How The Administration Of My School - 1588 Words

Introduction I will be examining how the administration of my school assesses the workforce of my school, works with the teacher unions and makes sure the school action plan is in place to attain the vision of the school. With all the moving parts of the school, I will be looking at how the administration keeps the focus of the school in the right direction. Procedures Used for Assessing the Workforce Our school uses a couple different techniques in order to assess the workforce engagement of the school. The mentor teachers and administrators use observations and data to help assess the classroom teachers of the school. The quarterly grades and test scores for each of the classes that the teacher is assigned will be examined by the†¦show more content†¦This process also lets the administration know which teachers are reaching out to the students and offering more opportunities to learn the material. During the time which teachers and mentor teachers meet to develop the action plan of the teacher, they will be using the data collected from observations, test scores and quarterly grades to help determine the areas of strength and weakness. The administration team and mentor teachers make a valid attempt to visit every classroom at least once every 2 weeks. When an administration enters the classroom they are looking at the interac tions between the educator and the student, the amount of questions and level of questions being asked to the students and finally the rigor of the lesson. These three areas are the most important to the success of the class. The action plans that are developed between the mentor teachers and the teachers are primarily focused on these observations. After the action is developed, the observers will be looking for progression in those problems areas that were identified. The action plan also has areas based on the quarterly grades and test scores of the students on the educators classes. The action plan of the educator will also have areas of how to improve the content retention of the students in the classes. Reviewing the grades and test scores of the students and coming up with ideas on how to advance the students

The And Its Impact On Society - 1707 Words

1. Zakaria argues that societies are going through democratization where closed systems are becoming more open. Therefore, now social change is originating from the masses unlike in the past. Today democracy is not just a form of government it is a way of life. For example, a singer that is more popular is also more successful. Large groups of people are what create change. Even capitalism is becoming more democratic. 2. Zakaria defines constitutional liberalism as the goals of government such as protecting the rights of its citizens. In contrast, democracy refers to a government who is elected through free and public elections. Chapter 1 3. Although some argue that the concept of liberty first originated in Ancient Greece, Zakaria argues that liberty first arose after the rise of the Catholic Church. As the Catholic Church’s influence grew throughout Europe, some began to rebel. These reformers such as John Calvin or Martin Luther broke away from the church which resulted in the Reformation. However, after the Reformation followed the Enlightenment which truly led to established liberty. People rebelled again authoritarian rule in both the American and French Revolution. These revolution led people to recreate their government structures. As a result, governments that promised to protect the rights of its citizens were created in both France and the newly established United States of America. 4. According to Zakaria, the relationship between culture andShow MoreRelatedThe And Its Impact On Society Essay1711 Words   |  7 Pagesfrom our identity, the past dictates how we are reared up, our place in society, society’s expectations of us, our expectation of society, and most importantly, our expectation of ourselves. Due to this inextricability, it is impossible to deny the past without simultaneously brushing off a part of ourselves. America in the 21st century can––heavy emphasis on can––be considered progressive, modern, and accepting. As a society, we aspire to be labeled as such: we take the label of being the â€Å"meltingRead MoreThe And Its Impact On Society1167 Words   |  5 PagesFor millennia, divine figures have been an integral part of human society. Ancient Greeks worshipped Apollo, the Egyptians revered Horus, and the Hopi paid homage to Kokopelli. Each divine figure is association with its own dogma, that is, a set of beliefs that are regarded as irrefutable. At best, these dogmas can serve as the backbone of a tightly knit community. However, more often than not, dogma harms society by either creating a schism within a religious group, or by promoting the persecutionRead MoreThe And Its Impact On Society2002 Words   |  9 Pagesthere has never been genocide aimed at an entire race of people. Others may assume that even if the dogma was used in America, there was no lasting impact on our society since the evils of Nazi Germany were revealed to the world. The ideology of the pseudoscience named ‘Eugenics’ has continued to have a great impact on the development of our society today. Eugenics is still being used today to justify the sterilization and is discrimination against women of color mothers today. Even though theRead MoreImpact Of A Mediated Society On Society1735 Words   |  7 PagesImpact of a Mediated Society Mass media has a direct and enormous affect on the current society from pop culture gossip to education among schools. The media is not only present in the environment but goes to lengths to control and dictate the feelings and perceptions of the current generation. Given that technology constantly reaches kids at younger ages, the prevalent existence influences children at younger years as time passes. 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We are at a crucial time in history where educators can make a difference in how our students interact with one another and make a place for themselvesRead MoreMusic And Its Impact On Society958 Words   |  4 PagesCulture Although some may suggest music can only serve for entertainment, music imposes a direct impact on the ideals and actions of today’s culture. In the past, the music of a culture greatly impacts the people and speaks what the people felt afraid to express. Different types of music reach different areas of the human brain, thus affecting the way people act in various ways. Music possesses such a deep impact on human brains it affects the way we act and process different situations we go through. AlthoughRead MoreThe Media And Its Impact On Society Essay1723 Words   |  7 Pagesand information about key points that the public ought to know about. Off base reporting implies that individuals have the wrong information about different issues and may settle on uneducated choices. Be that as it may, similarly as the media can impact the public to settle on a good choice, these public pioneers may just write about part of the issue, affecting the way that individuals comprehend certa in issues and driving them to settle on uneducated choices about subjects. In this twentieth-centuryRead MoreThe And Human Impact On Society1732 Words   |  7 Pagesresponsibilities, and offers more comprehensive information about the financial and human impact on society. Sustainability reporting discloses other relevant information about a company that financial reporting lacks. Currently, laws and regulations are not designed with policies and procedures to accommodate sustainability reporting. In order for companies to mitigate their risks and environmental impact, as well as provide reliable reports, a mandatory sustainability report is essential. 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Soul Food free essay sample

A ritual done over a specific length of time can become tradition, rooting itself into one’s culture and lifestyle. George Gmelch in the essay â€Å"Baseball Magic† describes rituals as being irrational and unemotional behaviors linked to an outcome. He finds when a baseball player has a good performance his rituals grow and are continued. Gmelch’s findings reflect that rituals fulfill one’s need for control over one’s environment. Similar to Gmelch, I have found that within my family the ritual of cooking soul food every Sunday has become a means of keeping my family together. By consistently performing this ritual a sense of control is established over the continual unity within my family. Unity is important because it is the basic structure of family, and is something that was not always a part of African American culture. Dating back to slavery, families were often divided in the slave trade and were never to be seen again. This division has had long-term effects on African American families to this day, where often it is seen that a father or mother is lacking and children are raised by extended family. My family came to California from the East Coast over 30 years ago, thus keeping the ritual of Sunday dinner alive has been a crucial factor in maintaining our unity as a family. My family practices the ritual of having a large soul food dinner every Sunday at my Aunt Louise’s house. On October 26, 2008 I arrived at my Aunt Louise’s house in Los Angeles, California. Just before entering the house I was greeted by the smell of baked foods. As I walked into my aunt’s cozy medium sized home, I immediately saw the dining room table fully set for the guests. The mahogany table was covered with a cream and gold tasseled table cloth, cream plates rimmed with gold sat on the table near silver goblets with gold rims, and champagne flutes and silver utensils matched with gold handles. This elaborate table setting directly reflects the teachings passed down within my family of having wealth within one’s spirit. Gmelch states that routines are â€Å"comforting; they bring order into a world in which players have little control† (303). Just as baseball players need routines to organize their lives, my family is routinely reminded every Sunday that just because we don’t have money it doesn’t mean our minds should be impoverished. In the areas where control is lacking, such as finance, our family finds comfort from this reminder representing the riches we share as a family. Thus at this table, memories have been shared over the years and special occasions celebrated. After exiting the dining room I entered the kitchen where I saw a grey pot of cabbage with a large piece of ham inside, biscuits, macaroni and cheese, and baked chicken smothered in gravy. The hot soul food on the stove indicated dinner was prepared and all the elements of Sunday dinner at my Aunt Louise’s house began to come together. I watched as my family members made their way to the food, dinner plates in hand. Within minutes everyone settled in at the dining room table. My dad began to tell everyone to hold hands and bow for prayer as he prayed for blessing over the food, which coincides with George Gmelch’s finding of how Latin American’s make the sign of the cross or bless themselves before every bat (304). As a Christian family the importance that has been placed upon giving thanks to the one who provided us with our meal is an aspect of the ritual implemented to purify the food we are eating. While the family ate, conversation was sparked and the â€Å"soul† food began to work its magic. The food we ate made everyone comfortable, warm and more open to each other. The known aspect of how this food affects us draws upon what Gmelch states about a fielder having â€Å"complete control over the outcome of his performance† and by cooking soul food a sense of control is established (305). Everyone knows my Aunt Louise is a great cook, and when she cooks our soul food favorites we can’t help but be drawn to her house for her cooking. The soul food we eat establishes our control as a unified family every Sunday. What is within this food, analyzed by Professor Fredrick Douglas Opie, is the yolk that continues to bring African American families together. Soul food and Sunday dinners have been a staple throughout African American families. Known for bringing families together for food and great conversation, this tradition roots itself in times as early as slavery. In an interview by journalist Farai Chideya of the National Public Radio (NPR), author and Professor Fredrick Douglas Opie examines the history of soul food. His book Hog and Hominy: Soul Food from Africa to America is an educational journey outlining where â€Å"soul† food began and how it became important to African American culture. He shows that the term â€Å"soul† as a prerequisite for the type of food commonly made by African American’s, stemmed from the 60s, an era of cultural empowerment. This food with â€Å"soul† as Professor Opie defines, is the main component of dinners which unite my family every Sunday evening. Within this traditional food cooked every Sunday our stomach’s are not the only aspect of us being fed, but our â€Å"souls† are being filled under the unity of food. My Aunt Louise is the reason the ritual of soul food being cooked on Sunday continues throughout our family. Historically the institution of slavery is where traditional African American foods were originally cooked, specifically out of â€Å"what the master rationed† (Opie). Usually when elaborate meals were cooked they were done sparingly and with whatever slaves could get their hands on. As Professor Douglas Opie draws upon, common soul food cooking in slavery rooted out of need, specifically for better tasting food. Similarly within my family, the need to keep everyone unified is the reason my Aunt continues the ritual of cooking soul food every Sunday. My Aunt Louise originally moved to California over 30 years ago with her sister, my grandmother. When she first moved to California with her sister, they were so busy raising children, working and dealing with marriage that seeing each other often was impossible. As she stated, the significance of her dinners every Sunday have been for â€Å"family gathering, so everyone can come together, enjoy conversation, catch up on their week†¦something that can’t be done everyday† (Robinson). A need to keep the family strong is why great soul food is cooked by her every Sunday. Originally my Aunt’s mother always cooked soul food dinners. Her mother and grandmother made sure that Sunday was specifically set aside â€Å"because that was an important day in our house that has been passed down from generation to generation† (Robinson). She was taught to cook at 11 years old, and from there participated in helping her mother cook elaborate meals on this special day of the week. The purpose for cooking soul food on Sunday as Professor Douglas Opie recalls, is because â€Å"certain foods weren’t always readily available to African Americans, so Sunday was set aside to cook them (Opie). † As a generational ritual among our African American culture, this day has held strong as a major characteristic of the ritual of cooking soul food by my Aunt Louise. What traditional soul food ritualistically cooked in our family every Sunday has done is bring us together. Foods such as fried chicken, greens, macaroni and cheese, cornbread and black eyed peas and gravy are known to bring comfort to an individual. Historically throughout slavery such staple foods gave a type of release to the stresses and depression occurred in that time. For my family, eating soul food when we are together comforts us and allows us to be more laid back and this in turn makes bonding every Sunday easier. Without this soul food, Sunday dinners could not be effective in the glue that keeps our family strong. Soul food is so closely aligned in the fabric of African American people and our culture that it’s almost impossible to get us to stop eating it (Opie). The soul food my family eats is a meaningful ritual and tradition because of its cultural roots and mysterious â€Å"feel good† qualities, soul food eaten in my family is a ritual of meaning which has become tradition. Within my family the tradition of having a large soul food dinner at my Aunt Louise’s house occurs every Sunday. Since I was a child, I remember going to her house, enjoying great food and socializing with members of my family. Gmelch in writing â€Å"Baseball Magic† discusses how rituals can play a large role in one’s life, as a means of control over a specific outcome. Overtime the ritual of soul food cooked every Sunday for dinner has become the incentive keeping unity within my family strong. The strength of family, especially to my own, reaches as far back into slavery where many families were broken apart. Opie in his interview by Farai Chideya in regards to his book Hog Hominy: Soul food from Africa to America analysis what soul food is and how it became to be important in African American culture. Originating out of a simple need for better tasting food, traditional foods cooked by slaves were later titled â€Å"soul food† during the Black Power Movement of the 60s. This soul food, passed down from generations is today what my family enjoys during time of bonding and relationship. In all, from what I have learned through observations and interview regarding this ritual, I will never look at my family’s Sunday dinners the same. As a ritual of true meaning, soul food dinner on Sunday is not only good food but a celebration of my family.

Wireless Networking Concepts Wi-MAX Networks

Question: Discuss about the Wireless Networking Concepts for Wi-MAX Networks. Answer: Compare and Contrast three data encryption standards for Wi-MAX networks The three data encryption standards are Cipher Block Chaining (CBC), Counter (CTR) and Counter with CBC Message authentication code (CCM). Cipher Block Chaining Counter Counter with CBC Message authentication code The (BA) base station forwards the data to (SS) Subscriber Station. The data is encrypted in a parallel order. It was developed as a non-patented alternative to OCB. A Security Association specific initialization vector is sent as a Traffic Encryption Key (TEK) response when the TEK three way handshake. It is better when compared with CBC. It is better than both CBC and CTR. For encryption of the data traffic, the algorithm makes use of Security Association specific Initialization vector combined with TEK. It handles encryption pre-processing. Combination of CBC-MAC is used for data authentication and CTR mode is used for data encryption. Complete security for the data encryption is not guaranteed by this standard. It do not contain the authenticity for the encrypted messages. It contains the authenticity for the encrypted messages. It contains traditional implementation methods. It contains simple implementation. Implementation costs less. It has no extra features instead makes use of the algorithm. It is the improved version of CBC. Additional features are added to CCM and it makes it more secured to achieve the cryptographic data encryption standard. It contains more number of complexities. Only certain complexities are resolved. It reduces the complexity to a greater extent. Performance is less. Performance is better than CBC. The performance is maximised. Research the security challenges for any two examples of WPAN technologies. The WPAN technology contains certain security challenges with respect to the Wireless USB and the ZigBee WPAN Technology. Wireless USB The Wireless USB is a technology which uses radio frequencies instead of cables. They provide connection to approximately 3mts ("Ellisys - Technology - Wireless USB", 2016). It uses the encryption and in encryption the security challenges are noticed. The Wireless USB, focuses on confidentiality, availability, integrity and authenticity (Keller, 2004). The current security challenges are in security attacks and fault diagnosis in the security services. The Intrusion detection Techniques, key management services and Secure Routing methods are used for prevention from the attacks (Kent, Tibbs, Sexton, 2009). In Wireless USB, the confidentiality follows certain criteria, they are as follows (Leavitt, 2007): The information is just provided to the authorised user. All the information is, required to be a secret. In Wireless USB, the availability follows certain criteria, they are as follows (Torres, 2008): The designed services are ensured by the node. In the nodes, the service attacks brings security challenges. They become successful in attacking the nodes. It fails to provide certain network services. In Wireless USB, the integrity follows certain criteria, they are as follows ("USB.org - Wireless USB", 2016): It is effective in maintaining the integrity. And the information is forwarded with their identity. In Wireless USB, the authenticity follows certain criteria, they are as follows (Rackley, 2007): It assures genuine communication between the users. It requires identify of the users for communicating with the other users. It ensures to claim the authenticity. In case if the authenticity is not claimed then it is possible to send the fake messages to any number of users. ZigBee WPAN Technology The ZigBee WPAN Technology, is used for transferring the data to approximately 70mts. 802.15.4 is named as ZigBee WPAN. Its main aim is monitoring and controlling the applications. It requires low range of information throughput and less power is consumed. The working process of ZigBee technology is that the data is transferred as the packets with at least 128 bytes ("What is Zigbee? | what is WPAN? | zigbee basics", 2016). This technology offers higher data transferring rate. A double layer is ensured for security. The double layer includes the security of Network Layer and the Application Layer (Labiod, Afifi, De Santis, 2007). It uses the security policy AES 128b Encryption standard algorithm. This algorithm deploys the MAC Layer. It contains the three following keys ("What is Advanced Encryption Standard (AES)? - Definition from WhatIs.com", 2016): Link Key The link keys is the unique key to connect the two nodes. The Application Layer controls and manages the Link keys. It requires more storage space. Network Key The network key is required by each node to connect the network of nodes. The Network key is used in a network for sharing the devices. The trust center forms the network key. Even at different intervals it forms the network key. Master Keys The master key ensures to keep the Link keys private. Every single node is installed with this master key. It makes use of Link key and the Network key. The master key follows a set of two security policy, which are updated and followed by the data centers. The two security policies are Commercial Mode and the Residential Mode. In the Commercial Mode, the network key is used by the data centers and are permitted to transfer their keys between the two nodes. It requires more space to store the resources, it offers a centralized model to maintain the security control of the keys (Labiod, Afifi, De Santis, 2007). In the Residential Mode, just the network keys are shared. It requires less space to store the resources and thus it is considered as the appropriate mode for implementing the wireless sensor model (Labiod, Afifi, De Santis, 2007). References Ellisys - Technology - Wireless USB. (2016).Ellisys.com. Retrieved 27 September 2016, from https://www.ellisys.com/technology/wusb.php Keller, S. (2004).Wireless USB. Labiod, H., Afifi, H., De Santis, C. (2007).Wi-Fi, Bluetooth, Zigbee and WiMAX. Dordrecht: Springer. Leavitt, N. (2007). For Wireless USB, the Future Starts Now.Computer,40(7), 14-16. https://dx.doi.org/10.1109/mc.2007.238 Rackley, S. (2007).Wireless networking technology. Amsterdam: Elsevier, Newnes. Torres, G. (2008).Introduction to Wireless USB (WUSB) - Hardware Secrets.Hardware Secrets. Retrieved 27 September 2016, from https://www.hardwaresecrets.com/introduction-to-wireless-usb-wusb/ USB.org - Wireless USB. (2016).Usb.org. Retrieved 27 September 2016, from https://www.usb.org/developers/wusb/ What exactly is Wireless USB?. (2005).Communications Engineer,3(4), 46-47. https://dx.doi.org/10.1049/ce:20050415 What is Advanced Encryption Standard (AES)? - Definition from WhatIs.com. (2016).SearchSecurity. Retrieved 27 September 2016, from https://searchsecurity.techtarget.com/definition/Advanced-Encryption-Standard What is Zigbee? | what is WPAN? | zigbee basics. (2016).Rfwireless-world.com. Retrieved 27 September 2016, from https://www.rfwireless-world.com/Terminology/what-is-zigbee.html

Achebes Things Fall Apart and the culture of the Igbo

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The Theory of Management Fashion Essay Example | Topics and Well Written Essays - 2500 words

The Theory of Management Fashion - Essay Example The essay "The Theory of Management Fashion" concerns the theory of fashion management. In view of this, the theory of management fashion states that management fashion is in principal a cultural happening structured by the rule of rationality. This means that the management must be perceived to be always looking for perfection. The primary belief in management is that over a given span of time, a particular management fashion will be out of trend, and a newer one will replace it. Based on this school of thought, certain management fashions last for a short time while other stay for a long period and attain widespread acceptance. In various management segments, several successions of management creativity are seen whereby as one goes out of trend and declines in popularity, the trendsetter initiates a novel innovation, thus resulting into a graphical representation of the trend as a rising and declining curve.Management fashion has been studied over the years through an examination o f two comparable life patterns. The first parallel is the discourse life pattern, which is an approach employed to study the volume as well as the natural world of disclosure concerning a particular trend over time. It employs bibliographic and subject matter breakdown, separating the assorted forms of discourse such as the Internet, business book, journal and magazines as well as the mass media. The dissemination life cycle is the second parallel. This strategy is employed to determine the level. to which management creativity is taken up by organizations, which follow fashion and the extent of use over a given period. Based on the innovation form and type, the analysis can be executed through case study surveys or the scrutiny of secondary facts such a sales figures and services supplies among other market indicators. Literature review Across generations, social science scholars have been captivated by fashion and fads. However, it is only recently that theories and schools studyi ng these two aspects in management emerged with scholars like Abrahamson (1996) pioneering in the field of study in addition to other scholars like Fairchild (1999) following suit. These scholars and their studies among others attend to the hype centered on organizational management models and tools namely knowledge management and quality circles among others (Herzhoff 2010). In view of this, four themes have been identified which are applicable to the study of management fashion. Fads and fashion in academic research There has been a divergence in view points concerning management fashion with scholars like Cole (1999) observing management fashion studies as an expensive pastime while Abrahamson (1996) acknowledges the importance of examining fashion, claiming that publicized themes of management should not just be disregarded. In view of this, other scholars like Collins (2000), support Abrahamson’s viewpoint. Abrahamson, who is a supporter of the management fashion theory, contends that philosophers and academicians ought not to be indifferent to trends, since they are not only restricted to aesthetics. Abrahamson (1996), further states that there exist two clear differences between trends and aesthetics. Trends in aesthetics necessitate only to be recent and attractive, whereas trends in management need to be not only logic but also progressive. Secondly, the demand for aesthetic fashion is influenced by social

A Report on the Investigation on the Allegations against a Plant Essay

A Report on the Investigation on the Allegations against a Plant Employee of an Acquired Corporation, Lakes Inc - Essay Example The investigation landed on a big clue, which made it clear that the offence was done in the preparation of invoice for purchase of items. From this case it was found that actually, the invoice was supposed to be prepared for purchasing high definition flat screen television but the prepared invoice was in the name of a computer server. The investigation is carried out from August to November 2009. In the mean time, it was also found that the employee has submitted the invoice through the purchase department for a refund amount of $8,795.60. Due to this issue, the director of purchasing department, Mr Bob Smith, and the administrative assistant, Ms Mary Bad, had to be terminated from the company. The company maintains a database for all the items they purchase and a particular code is fixed for the items, which relates to the work done by the administrative assistant. As part of the investigation, a visit was made to all the stores from where the goods were purchased. The manager of one store said that in the past six months, Bob Smith had done two more purchases and these items were delivered either to him or his assistant. He showed the invoices of these items that had been purchased. When comparing these with the plant invoices, the file had only copies. Everything in the invoice except the name of the items was similar. The director of the purchasing department and the administrative assistant are the culprit in this case. They cheated the company and this had been continuing for several years. The invoices, the proof and the statement of the store manager have been apt evidences for this particular investigation. Bob Smith and Mary Bad were cheating the company by making false invoices and purchasing costly items with the company’s earnings. They might even resell these items at a higher price and make more profits out of it. The case is found to be misappropriation on purchasing the asset. There are various schemes for asset misappropriation such a s â€Å"skimming, cash larceny, fraudulent disbursements, and non-cash larceny and misuse† (Albrecht n.d pg 2). Misappropriation of the Asset Fraudulent Disbursement Scheme From these schemes, the one, which is similar to the case under study here, is the fraudulent disbursements scheme. Asset misappropriation schemes consist of â€Å"those frauds in which a perpetrator employs trickery or deceit to steal or misuse an organization’s resources† (Albrecht n.d pg 1). In this case, both the director and his assistant have taken assets of the organization to benefit themselves. Here, misappropriation of assets occurred during the purchase of goods and services. The organization pays extra for purchased goods and services, as all of them were not used in the plant. It includes a billing scheme, which involves employers making payments based on false invoices for personal purchases as done by Mr Bob Smith and Ms Mary. Such type of asset misappropriation frauds are seri ous enough, which result in material misstatement of the financial statements of the organization, without the knowledge of the management. Finally, the company incurs a huge loss and a lot of damages. Final Results of the Investigation Asset misappropri

Essay on Typical Cell Example | Topics and Well Written Essays - 1250 words

On Typical Cell - Essay Example Additionally, each cell keeps its own instructions that enable it to carry out these tasks. The debate over typical cell has been present for several decades. Microbiology scientists in different factions have defined the basic cells with its components, while others argue that the definition of a typical cell is not definite. This paper discusses the basic structure and functioning of the cell to understand whether there is anything like a typical cell. The cell is the fundamental building block for all living organisms. Living cells are divided into two main categories: prokaryotes and eukaryotes. Scientists believe that life on earth began some 4 billion years ago. Prokaryotic cells were the first cells to evolve in the world. These organisms did not have a nuclear membrane, the membrane surrounding the nucleus of a cell. Bacteria cells are an example of prokaryotic organisms. However, the recent discovery of archaea (a second prokaryotic) proves that there was a third life of cel lular domain (Panno, 2005:41). Prokaryotes are single cell organisms that do not differentiate or develop to form multi-cellular organisms. Although some bacteria reside as masses of cells or grow in filaments, each single cell is similar to the other and has the capacity to exist independently. The reason behind the existence of the cells is the probability of not separating after cell division, or maybe they remained in a common slime or sheath (Cooper and Hausman, 2009:246). Despite their close arrangement to each other, they do not communicate or interact for continuity. Prokaryotes differ from eukaryotes based on nuclear structure and organization. Prokaryotes have the capability to inhabit everywhere on the planet, including our body surface. Prokaryotes lack the nuclear membrane. They also have no intracellular structure and organelles characteristic of eukaryotes. The functions of the organelles like mitochondria, Golgi apparatus, and chloroplasts are delegated to the prokar yotic plasma membrane. A prokaryote has three main architectural regions: a cytoplasmic part that has the ribosome and cell genomes (deoxyribonucleic acid DNA), a cell envelope that has a plasma membrane, a cell wall, and a capsule, and appendages refered to as pili and flagella (Panno, 2005:67). On the other hand, eukaryotes have a more defined nuclear structure. Examples of eukaryotes include animals, plants, and unicellular organisms. Eukaryotes are approximately ten times larger than prokaryotes, and having up to 1000 times much volume. The major difference between the two is that eukaryotes have compartments within the membrane where particular metabolisms occur (Cooper and Hausman, 2009:290). A significant difference is the nucleus, which is a compartment delineated by the nuclear membrane. The nucleus houses the DNA of the eukaryotic cell, thus the name of the eukaryotes (true nucleus). The eukaryotes also have organelles, special small structures that perform specific functi ons within a cell. Eukaryotic cells have dozens of different types of these organelles. Eukaryotes were a major development on the life of living things as well as a key evolution concept. Eukaryotes use the same metabolic processes and genetic codes like prokaryotes, but their advanced organizational complexity allows development of multi-cellular organism (Cooper and Hausm

Hutchinson-Gilford Progeria Syndrome Genetics

Hutchinson-Gilford Progeria Syndrome Genetics Progeria is a rare, fatal, sporadic, autosomal dominant syndrome that involves premature aging, generally leading to death at approximately 13 years of age due to myocardial infarction or stroke. The genetic basis of most cases of this syndrome is a change from glycine GGC to glycine GGT in codon 608 of the lamin A (LMNA) gene, which activates a cryptic splice donor site to produce abnormal lamin A; this disrupts the nuclear membrane and alters transcription. Mutations in the Lamin A: To date, models have been proposed to explain how mutations in the lamin A gene could lead to HGPS, structural fragility and altered gene expression. One model links HGPS to stem cell-driven tissue regeneration. In this model, nuclear fragility of lamin A-deficient cells increases apoptotic cell death to levels that exhaust tissues ability for stem cell-driven regeneration. Tissue-specific differences in cell death or regenerative potential, or both, result in the tissue-specific segmental aging pattern seen in HGPS. Children born with HGPS typically appear normal at birth, but within a year they begin to display the effects of accelerated aging. Typical facial features include micrognathia (small jaw), craniofacial disproportion, alopecia (loss of hair), and prominent eyes and scalp veins. Children experience delayed growth and are short in stature and below average weight. Due to a lack of subcutaneous fat, skin appears wrinkled and aged looking. Other key abnormalities include delayed dentition, a thin and high pitched voice, a pyriform (pear-shaped) thorax, and a horse riding stance. As they mature, the disorder causes children to age about a decade for every year of their life. This means that by the age of 10, an affected child would have the same respiratory, cardiovascular, and arthritic conditions as a senior citizen. On average, death occurs at the age of 13. HGPS vs. Inheritance HGPS had been proposed to be a recessive disorder due to observations of affected individuals found in consanguineous families. However, many cases of progeria were also observed in families in which the parents were not related, suggesting sporadic autosomal dominant inheritance, which has been confirmed with the discovery of the causative mutations. Others have reported the presence of various chromosomal abnormalities, such as an inverted insertion in the long arm of chromosome 1, as possible contributing factors to the disease. These cytogenetic clues proved to be critical for discovery of the HGPS gene. HGPS vs. Genetics After many years of appreciating that HGPS was caused by genetic rather than by environmental factors, researchers took the first steps in isolating genetic mutations that cause HGPS. A team centered at the National Human Genome Research Institute in Maryland, under the direction of Francis Collins, initiated their search with a genome-wide scan. Using 403 polymorphic microsatellite markers, the investigators found no evidence of homozygosity in 12 individuals with classical HGPS. However, two individuals showed uniparental isodisomy of chromosome 1q, and one had a 6Mb paternal interstitial deletion in 1q. From this observation, the investigators concluded that the HGPS gene must lie within a 4.82Mb region on chromosome 1q. This region contains approximately 80 known genes, including Lmna. Lmna and Types A-type and B-type lamins (Type V intermediate filaments) are the main components of the nuclear lamina, the innermost layer of the nuclear envelope. The nuclear lamina in mammalian cells is a thin (20-50 nm) protein meshwork that interacts with various proteins and chromatin and is essential for maintaining the structural integrity of the nuclear envelope, the protective barrier between the cytoplasm and nucleus. Cell studies of HGPS patients Immunofluorescence studies with antibodies against lamin A/C were performed using fibroblasts from HGPS subjects and their parents. The results showed structural nuclear abnormalities in 48% of HGPS cells compared with

King Lear :: essays papers

King Lear Act I Scene i: Set in the royal court, the first scene of Shakespeare's King Lear pivots upon the refusal of the aged monarch's youngest daughter, Cordelia, to follow the suit of her sisters Goneril and Regan in professing love for their father, and Lear's wrathful decision to disown Cordelia. Nevertheless, Act I, scene i of Lear begins with a parallel subplot about the bastard Edmund's treachery toward his father Gloucester and his brother Edgar. At the start of the scene, we first see the loyal gentlemen Kent and Gloucester discussing Lear's intention to leave the realm to his daughters and their sons-in-law. The dialogue is interrupted by the appearance of Edmund, the illegitimate son of Gloucester. In due course we learn that Edmund is not only a bastard but also an inveterate villain, the male counterpart to Lear's "evil" daughters, Goneril and Regan. Trumpets blare as a majestic Lear arrives with his retinue and announces that his "darker purpose" is to hand over his kingdom to his t hree daughters. He proceeds to ask each of them to express their love for him in words. Goneril tells her father that he is dearer to her than "eyesight, space and liberty" (l.56); the second daughter Regan answers that she is "an enemy of all other joys" (l.73). But Lear's youngest daughter, Cordelia, responds that she can add nothing to what her older sisters have said. Cordelia refuses to go beyond her own heart and conscience; she loves her father, but not to the exclusion of all else. Lear becomes infuriated, and then disinherits and disowns his youngest daughter. The goodly Kent's efforts to restore Cordelia only provoke Lear's wrath and lead to the nobleman's banishment. When two suitors for Cordelia's hand in marriage, the Duke of Burgundy and the King of France appear, Lear tells them that they must take her without a dowry. The Duke of Burgundy refuses but the King of France takes the fair and true Cordelia with him. In the scene's final exchange, Goneril and Regan reveal themselves as the coming villains of the tragedy, with the bastard Edmund lurking in the background Scenes ii, iii, iv, & v: Here Shakespeare returns to the subplot, as Edmund devises a scheme to set his father against Edgar, Gloucester's legitimate son. He shows Gloucester a phony letter in which Edgar tries to enlist Edmund into a murder plot against their father.

Importance of the English Language in Present Day World Essay

Language is the source of communication. Its the way through which we share our ideas and thoughts with others. There are uncountable languages in this world. Because every country has their own national language, then they have different local languages spoken and understood by their people in different regions. Let’s talk about English. It is the language of England and has International Standard. Many people think English as American Language but it is not true. In fact, when Columbus discovered America, he saw the country in the Stone Age with high illiteracy rate. Those were the European and English people who brought education and knowledge even technology towards America. There are several factors that make us to learn English Language to go through in the current time. First of all, as I already mention, it has International Standard, that’s why everyone needs to learn English in order to get in touch on International Level. If we see Educational field, we will find much of the syllabus is written in English. Children are taught and encouraged to learn English on starting levels. And accordingly, as they promote to the next levels they study almost all the subjects in English. We see the Internet and find more than 90% of websites written and created in English. And even when you see some sites in other languages, they also give you the option to translate in English. All the research and studies you find will be written and typed in English. All the information regarding each and everything contains English Language. There is another factor that make English very important in this world is it is the easiest language of the world to learn. Many people think that it is very difficult and confusing. But I suggest them to start and learn only for a week and they will feel easy with English. With good understanding and communication in English, we can travel around the globe. We get assistance and help in English in every part of world. You can test it by on line travel. Better you visit some offices, companies, governmental organizations, and other departments, and you will see the importance of English as they hire the professional staff after getting know that whether the people they are hiring are good at English or not. This is the company’s will that their staff is not even well educated but also good English speaker, writer and Reader. Those who are still unaware about the importance of English. They should start learning English as a time will come when everything would be understood, spoken and written in English. Better watch some media and get the scope of English.

How to Conjugate French Regular -ER Verbs

How to Conjugate French Regular -ER Verbs There are five main kinds of verbs in French: regular -ER, -IR, -RE; stem-changing; and irregular. Once youve learned the rules of conjugation for each of the first three kinds of verbs, you should have no problem conjugating regular verbs in each of those categories. The majority of French verbs are regular -ER verbs. French Regular -ER Verb Conjugations The verb form that ends in -ER is called the infinitive, and -ER is the infinitive ending. The verb with the infinitive ending removed is called the stem or radical. To conjugate -ER verbs, remove the infinitive ending to find the stem and add the endings. The table lists the present tense conjugations for the regular -ER verbs parler (to speak or talk), donner (to give), and visiter (to visit). To help with learning, the infinitive form is listed (such as  parler) followed by the stem (such as  parl-). Pronoun Ending parler parl- donner donn- visiter visit- je -e parle donne visite tu -es parles donnes visites il -e parle donne visite nous -ons parlons donnons visitons vous -ez parlez donnez visitez ils -ent parlent donnent visitent Regular -ER verbs share conjugation patterns in all tenses and moods. More -ER Verb  Conjugations: Penser The rules for conjugating regular -ER verbs remain the same throughout all tenses and moods: Thats why they the are called regular -ER verbs. For your studies, it can be helpful, however, to view all the conjugations for all tenses of moods of a regular -ER verb, such as  penser  (to think). Remember that to conjugate this regular -ER verb, simply take the stem -pense  and then add the appropriate endings. Pronoun Present Future Imperfect je pense penserai pensais tu penses penseras pensais il pense pensera pensait nous pensons penserons pensions vous pensez penserez pensiez ils pensent penseront pensaient Pronoun Subjunctive Conditional Pass Simple Imperfect Subjunctive je pense penserais pensai pensasse tu penses penserais pensas pensasses il pense penserait pensa penst nous pensions penserions pensmes pensassions vous pensiez penseriez penstes pensassiez ils pensent penseraient pensrent pensassent Pronoun Imperative tu pense nous pensons vous pensez Some Common French Regular -ER Verbs Take some time to familiarize yourself with the most common regular -ER verbs, because youre likely to encounter these words often when reading or speaking French. They all share the same conjugation patterns, with a few exceptions noted below. aimer   to like, to lovearriver   to arrive, to happenchanter     to singchercher   to look forcommencer   to begindanser   to dancedemander   to ask fordà ©penser     to spend (money)dà ©tester   to hatedonner   to giveà ©couter   to listen toà ©tudier      to studyfermer   to closegoà »ter     to tastejouer   to playlaver   to washmanger     to eatnager   to swimparler   to talk, to speakpasser   to pass, spend (time)porter   to wear, to carryrà ªver   to dreamsembler   to seemskier   to skitravailler   to worktrouver   to findvoler   to fly, to steal A Few Exceptions All regular s of this kind of conjugation would be commencer  (to begin), manger (to eat),  nager  (to swim), and  skier (to ski). Though they are conjugated just like regular -ER verbs, watch out for verbs that end in  -IER, such as  Ãƒ ©tudier  (to study).

The Pros And Cons Of Outsourcing Essays - Human Resource Management

The Pros And Cons Of Outsourcing Essays - Human Resource Management The Pros And Cons Of Outsourcing Besides hiring workers through their company, businesses often choose to lease or rent them from outside leasing companies. The term outsourcing is referred to as using leased employees or hiring outside staff. These employees can be noted as temporaries, temps, contract employees, or casual workers. Throughout the past decade, this practice has become a more accepted method for hiring firms to attain the services of outside workers. This fairly new business practice can be benefiting to the business although in some ways it may be inadequate. Employee leasing can give you many benefits that can be obtained by hiring independent workers. The leasing company hires highly trained and experienced workers who are brought in only when needed and then are disposed at the end. This becomes an opportunity for the business to use sufficient workers without the trauma and expense of laying off their own employees. This is by far easier for the employee and the employer due to the intermediary which is the leasing company. This intermediary takes away the unnecessary steps which often occur in business situations. Another contributing factor in having leased employees benefiting the company is the fact that you do not have to pay and withhold federal and state payroll taxes for these people. The leased employee does not require benefits or workers compensation. This cuts out the costs a great deal for the company. In most cases, leased employees have a certain expertise, which eliminates the need to train former employees to do jobs involved with the area in which a skill is needed to learn. In the case where a company has employees with a lack of internet skills, the leased employee can definitely be used in a positive manner.

Electoral College Essay Example | Topics and Well Written Essays - 250 words

Electoral College - Essay Example This research will begin with the statement that an electoral college comprises of a group of electors who are chosen to elect a candidate to a certain office. Since 1964, in the United States, 538 electors have been selected in each presidential election. This is in line with article II, section 2 of the US constitution, which clearly outlines the number of electors that every state should have. It also spells out how those electors should be chosen. The Electoral College is an illustration of an indirect election, unlike the popular vote as the measure for electing the president. The researcher tells that he supports the Electoral College since; it gives a chance all citizens to air their views in a representative way, which is an act of exercising democracy in a free and fair manner. On the other hand, if we just use popular vote, for instance, the main cities on the eastern and western coastal region of the US could be making a decision the CIC always. Furthermore, the Electoral College has survived and is still flourishing for over a period of 200 years in electing the president and other government officials. The Electoral College system supports the two party systems, something that has significantly played a vital role in maintaining peace and stability among the people of America. Therefore, the author of this paper advocates that the Electoral College ought to continue being used for conducting presidential elections.

Leadership evaluation of prior manager Essay Example | Topics and Well Written Essays - 2000 words

Leadership evaluation of prior manager - Essay Example Usually these kinds of leaders have high level of performances and low level of grievances as these leaders are more committed to achieving goals. Moreover, high task leaders are strong when it comes to technical skills and are good nurturers and planners. Another important trait that such leaders possess is the work allocation as proper defining and scheduling of work is done for workers to maximize productivity and later for doing assessment for workers. Similarly, high people leadership style focuses on building trust between manager and workers. This kind of leadership usually has strong personal traits and are committed towards making a bridge between manager and worker by creating or ensuring trust, delegating responsibilities to the workers, motivating employees by listening and fulfilling their needs. Philip Mayers, director of Make a Wish organization Australia, was asked to fill the assessment form for behavioral leadership. He scored 8 (in terms of odd numbers) which proved that he possessed high task leadership. Moreover, in terms of even number, Philip Mayers score was 7, which meant he had high people leadership style as well. It has been found that Mayers ensured that his employees were engaged with work full-time and were not doing any other activity during working hours. Similarly he does not waste time in knowing about employees during working hours and believes in setting goals and agenda during department meetings. He believes in punctuality and has a clear policy of briefing employees what needs to be done. However in case of conflicts in the organization, he personally gets involved and tries to come up with the solution to carry out work in a peaceful manner. Also he periodically tries to motivate his staff so that they can achieve goals easily. In terms of working habits, Mayers is reluctant in giving permission regarding problems that occur during work and the solutions of those problems. He believes in

Financial Statement Analysis and Valuation Assignment

Financial Statement Analysis and Valuation - Assignment Example The organization has a rich history which dates back to the industrial revolution. The company was founded on September 19, 1759. The human capital of the firm is what has made this organization so successful. The biggest companies in the world are recognized by their talent and the attitude of their people (Martinez, 2014). The global workforce of the firm is composed of 49,700 employees. The majority employees of the firm are located in the UK and Europe. GKN has operations in 33 countries across five continents. GKN has expanded its operations using both wholly owned subsidiaries and joint ventures. The strategy of the organization is to maximize shareholder value by growing its earnings, dividends paid to shareholders, and maintaining sustainable growth in sales, profitability, and cash generation (Gkn, 2015). A main competitor of the company is Meggit PLC. Meggit PLC is a global engineering company that specializes in extreme environment components and smart sub-systems for aerospace and energy markets (Meggit, 2015). The global workforce of this firm is composed of 10,000 employees and the operations of the company are located across Asia, Europe, North America, Brazil, India, and the Middle East. One of the goals of the corporate governance initiatives of the company is to maintain internal control. The board of directors of the company is composed of nine members. Kevin Cummings is the chief executive officer (CEO) of the firm. Within the board of directors there are four committees. These four committees are the executive committee, audit committee, remuneration committee and nominations committee. Over the last few years three of the awards that the company has won include Quality Achievement Award 2013, Excellent Quality Supplier Award, and Fords certification for manufacturing excellence. GKN generated revenues of  £7,136 million of 2013. The revenues of the company

Movie vs books Essay Example for Free

Movie vs books Essay From our mouths, to writing and finally to film, the way we tell stories has evolved over time and I must say thank God for its advancements. Reading a book can be nice but thanks to movies all the work of deciphering the message of the story is done through the director of the motion picture. He is responsible for researching the story to find the intent of the writers and will often consult with the writer to bring you the true meaning of the story. The director brings the story to life on screen with words, images, and sounds, leaving little to wonder, taking out the questions of what the story is about and leaving us with little or no debate. Examples of this can be seen in the Hollywood productions of the movies â€Å"Holes† and â€Å"The Great Gatsby†. The movie Holes (2003) was directed by Andrew Davis who used the writer of Holes, Louis Sacher as a consultant on the set during production (Movie Hole Interview October 6, 2003). The movie follows the life of a boy, Stanley, who due to a family curse, ends up in a juvenile detention center out in the middle of nowhere after being falsely accused of stealing shoes. A witch has placed a curse on Stanley’s family causing this turn of events; the curse can’t be removed until he completes certain tasks for his best friend. At the detention center he is brought together by fate with a boy named Zero who will become his best friend. Through trials and tribulations he and his friend are able to stay united, break the family curse, and get out of the juvenile detention center. Holes was one of my favorite movies growing up, and I have also read the book, I believe the movie follows the storyline of the book down to its minutest details. The movie provided all of the key factors that the book Holes was trying to convey, and in comparing the two I was almost stunned at the realization that the two were one in the same. The movie gives the reader and viewer the same theme time and time again throughout the story; friends will get you through the day, and stick to your goals. The Great Gatsby is another movie that I’m sure many people are familiar with and the story is one I myself have fallen in love with. Like holes I have also read the book that was based on the most recent Great Gatsby (2013) movie remake by director Baz Luhrmann. It is a marvelous movie that evokes a person’s passion, yet wills you to move on past lost love. In the movie we follow the narrator who takes us into the world of Gatsby, a Debonair Millionaire. From watching the movie we may conclude that everything Gatsby does throughout the story is for a woman name Daisy, whom is in love with and desires. To impress her he throws luxurious parties and to be closer to her he buys a mansion across the bay from her. Unfortunately due to his misplaced love, a love that should have been for God, he moves to corruption and swindling to attain his love, alas the only love he receives is the one who loves all, Death. Director, Baz Luhrmann tells the New York Times (May 9, 2013) â€Å"That he sticks close to the details of the story and lifts dialogue and description directly from the novels†. In doing so he is helping to provide us with a view of the story that the writer envisioned. Yet personal interpretation can be a problem within itself when comparing a movie to a book. While there is normally one message you can take away from a movie, with a book readers are able to decipher messages differently possibly coming to a conclusion the author never intended in the first place. Take the book 50 shades of Grey, which is rumored to be a movie soon, while discussing it with several women I have gotten several different interpretations of its meaning. Many saw the book as a romance novel with a main character that falls deeply in love. While some saw the main character as a scary control freak who liked to beat up his women. As for myself, I took it as a trashy love story reminding us of things we all secretly wish for, like the change to be a millionaire and to have incredible sex. So in conclusion, I can say with certainty that movies are the media in today’s society that can create a clear and concise message closely delivering what the writer had intended for its audience. While books can tell a story and allow the reader to use their imagination when determining the message of the writer we are often unsure about what message the writer was truly trying to convey when we finish the book. Movies provide us with words, sights and sounds that give us a clearer picture as to what the writer is trying to tell us. When we finish watching a movie we are left with little room for interpretation or argument and when we leave the theater we are satisfied that we have a good understanding of the writers true message was.

Web Pages :: Internet Technology Computers Essays

Web Pages The phrase "point and click" is all too familiar to the basic computer user these days. With their computers, people now have the power to do see and do a plethora of things with this phrase. Thanks to the invasion of cyberspace, even more possibilities exist to the everyday computer user. The Internet is an almost infinite resource for providing great reference information, entertainment, and other everyday needs. Obviously, people have their preferences of which pages they find the best or most useful. It is also quite clear that different pages have different purposes and therefore are displayed quite differently. For the expert computer user, time seems to play a factor in a good web page in terms of a simple yet informative page. Others prefer stunning visual or even audio effects to receive information. Web pages come in all styles and forms and exist for different purposes. Their appeal is completely personal to the viewer. First off, I would like to talk about informational pages. These pages exist for the sole purpose of enabling people to find out about a certain subject. For example, I had to write a research paper on atheism. As I put the word "atheism" through the Lycos search engine, many great pages came up. A very popular thing that web sites have are FAQ's. FAQ's stands for frequently asked questions. Of course, these questions come with answers that are either very blunt and simple, or complex and detailed. I find that most FAQ's give me more than enough information to satisfy my needs. Informational pages tend to not have fancy backgrounds and options such as Quicktime movies, JPEGs, or sound applications. These are a waste of memory and for the most part are not helpful to people who need fast and quotable information. However, people who have the time and interest to utilize these options can benefit from them. For certain subjects like music, sounds are obviously a good thing to have on a page. Links to other related pages are great if you need more than one source to research a certain subject. However, I do not like pages that have thousands and thousands of links. It is overwhelming to find that many links. The web maker should provide around ten good links. After all, the pages that are linked also have many links to them as well.

The Custom Woodworking Company Case Study Essay -- Project Management

Table of Contents I. Introduction 3 II. Custom Woodworking Company Corporate Profile 3 III. Opportunity 4 IV. Project Concepts 5 V. Case Study Proposal 5 VI. Project Processes and Knowledge Areas 6 VII. Project Planning 7 VIII. Quality 8 IX. Cost Estimating 9 X. Risk Identification and Management 10 XI. Facility Startup and Project Closeout 11 XII. Conclusion 12 XIII. Bibliography 13â€Æ' I. Introduction The Custom Woodworking Company (CWC) was founded in 1954 by Ron â€Å"Woody† Carpenter. Woody, after an apprenticeship as a cabinet maker, started his own small woodworking business, specializing in furniture manufacturing. Due to the high quality of the craftsmanship, CWC gained a reputation for their high quality and attractively designed furniture. Since that time, CWC has grown in to a successful mid-size organization, providing several lines of furniture to wholesalers and retail centers, as well as producing and supplying cabinets for residential construction contractors. Throughout the years, CWC has steadily prospered and has created a loyal staff and work force. John Carpenter, Woody’s son, has recently joined the CWC team after completing business degree. Under his strong guidance, CWC has moved into the commercial construction industry, supplying and installing countertops, cabinets, and other fixtures in commercial developments. CWC currently possesses a high reputation for supplying millwork to the construction industry. II. Custom Woodworking Company Corporate Profile Location: Someplace, NY Business: Furniture manufacturing, ... ...ovartis Foundation for Sustainable Development (2013). Project Management Handbook A Working Tool for Project Managers. [ONLINE] Available at: http://www.novartisfoundation.org/platform/apps/Publication/getfmfile.asp?id=613&el=808&se=1800744&doc=44&dse=4. [Last Accessed 20 April 2014]. PMBOK, (2013). A guide to the project management body of knowledge : (PMBOK guide). 5th ed. Newtown Square, PA: Project Management Institute, Inc.. Project Management Institute (PMI) (2013). Project Management Professional (PMP) Handbook. [ONLINE] Available at: http://www.pmi.org/certification/~/media/pdf/certifications/pdc_pmphandbook.ashx. [Last Accessed 20 April 2014]. Wideman, M., (1993). Project Management Case Study The Custom Woodworking Company - Woody 2000 Project. [ONLINE] Available at: http://www.maxwideman.com/papers/woody2000/intro.htm. [Last Accessed 24 April 2014].

Prediction of Cross-Axis-Sensitivity of Inertial Micro-Sensor Through Modeling and Simulation

Prediction of Cross-axis-sensitivity of inertial micro-sensor through modeling and simulation B. P. Joshi1, A. B. Joshi2, A. S. Chaware2 , S. A. Gangal*2 1 Armament Research & Development Establishment (ARDE), DRDO Ministry of Defence, Dr Homi Bhabha Road, Pashan Pune-411021, India Ph. No. +91-20-2588 4795, Fax No. +91-20-2589 3102 E-mail:[email  protected] org 2 Department of Electronic Science, University of Pune, Pune-411 007, India Abstract: In addition to sensitivity and bandwidth, the cross-sensitivity is an important design parameter for acceleration/ inertial sensor design. In this paper prediction of cross-axis sensitivity of cantilever type of piezoresistive accelerometer is discussed. The effect of variation in geometrical parameters such as width and thickness of flexure & proof mass (PM) on crosssensitivity are studied. Optimization of cross-sensitivity by varying geometrical parameters has been attempted. This paper deals with simulations of skewed type (Flexure perpendicular to proof mass) and planar type (Flexure in plane with Proof mass) structure for cross-axis sensitivity analysis. The simulation and modeling has been carried using Coventorware MEMSCAD software. Keywords: Inertial sensor, Cross-sensitivity, MEMSCAD, FEM. 1 Introduction Micromachined accelerometers are widely used in many applications. Large number of scientists all over the world are working on MEMS based acceleration sensors that are mostly either capacitive or of piezoresistive type. A piezoresistive type of acceleration sensor basically consists of a proof-mass attached to a micro-cantilever (Flexure) all made out of silicon. [1-4]. For piezoresistive accelerometer sensitivity S is defined as relative change in resistance per unit of acceleration. Following mathematical equation defines relation between sensor dimensions and its sensitivity [5]. Equation for sensitivity can be written as: S = K . g . L t 2 (In Pa. ) †¦Ã¢â‚¬ ¦ Eq. 1 Where, S is the sensitivity [stress level], g is the applied acceleration, t is thickness of flexure in  µm, L is length of flexure in  µm, K is the constant of proportionality. An accelerometer is expected to have only one sensitive axis. However, cantilever type of accelerometer is also sensitive in other direction. This undesired sensitivity is called as cross axis sensitivity. Cross axis sensitivity is the maximum sensitivity in the plane perpendicular to the sensitive direction relative to the sensitivity in the measuring direction. It is calculated as the geometric sum of the 1 sensitivities in two perpendicular directions in this plane [6]. If Z is sensitive axis then cross sensitivity is defined as †¦Ã¢â‚¬ ¦Eq 2 Where suffix (x, y, z) denotes axis in which sensitivity is measured. Effect of cross sensitivity is one of the most important design considerations. Many attempts have been made to reduce cross sensitivity by the accelerometer designers. 7-8]. Since it is a structure deflecting under influence of inertial force, stress is developed in the flexure due to its bending. Therefore it can be stated that if the width of flexure is much greater than its thickness the cross axis sensitivity will be low. Different types of mechanical designs and structures have been tried by designers to reduce cross-sensitivity effect. Efficient use of four-piezor esistors in bridge structure is mostly tried structure [7]. Another way to reduce cross sensitivity is multi flexure accelerometer [8]. However, all these structures have a major drawback, that is, they require more processing steps as well as larger size on chip. In this paper, single cantilever type piezoresistive accelerometer is presented. The crosssensitivity is analysis is carried out by varying width as well as thickness of flexure and proof mass. Paper discusses simulations carried out for skewed and planner structure accelerometer using Coventorware software. 2 Simulations Cantilever (Flexure) type of piezoresistive accelerometer is modeled and simulated using Coventorware 2003 software. Fig. shows Skewed type acceleration sensor structure, in which Flexure is perpendicular to proof mass and sensitive axis is Y-axis. The sensor is modeled with proof mass having dimension of 2000 µm X 400 µm X 200 µm (LxWxH) and flexure is having dimensions of 100 µm X 50 µm X 12 µm (LxWxH). In this structure, flexure width is in Z-axis and flexure thickness is in Y-axis. Fig. 2 shows the planar type of accelerome ter of the above dimension, in which flexure is in plane with Proof Mass. In this case, flexure width in Y-axis, thickness is in Z-axis. Z-axis is sensitive axis. Simulation is carried out using MemMech solver. The Max stress values are considered for discussion in terms of sensitivity. Z Y X Fig 1: Skewed piezoresistive Accelerometer Fig 2: Planar Piezoresistive Accelerometer 2 Simulations are carried out to find cross-axis sensitivity by varying flexure thickness & flexure width. Simulations are also carried out to find cross-axis sensitivity by varying thickness and width of proof mass. 3 Results and discussions 3. 1 Skewed structure (Fig 1) Simulations were carried out on skewed type of structure (of dimension mentioned in simulations above) by varying its lexure thickness. Flexure thickness is varied from 50  µm to 200  µm and flexure width is kept as 12  µm. Skew structure response for variation in flexure thickness is shown in table No. 1. Here sensitive axis is Y-axis. Table 1: Cross axis sensitivity w. r. to variation in Flex thickness for skewed structure Flexure thickness In  µm 50 100 150 200 Sz Sx Sy (In MPa) (In MPa) (In MPa) 82 6. 5 340 22 1. 5 170 9. 8 0. 52 110 5. 6 0. 19 81 % Cross-Sensitivity 24. 19 12. 97 8. 92 6. 92 Thickness to width ratio 4. 17 8. 33 12. 50 16. 67 It is observed that as the flexure thickness is increased while keeping the width same, cross axis sensitivity decreases but at the cost of sensitivity, which is not acceptable. To minimize this undesirable cross-sensitivity effect, structure is modified. In modified structure, flexure is in plane with proof mass. [Fig no. 2] Further simulations are carried out with Planner structure. 3. 2 Planar Accelerometer Planner accelerometer of above-mentioned dimensions was simulated. Varying geometrical parameters like thickness & width of proof mass as well as flexure simulations were carried out. The results are given in following paragraphs. Here sensitive axis is Z-axis. 3. 2. 1 Variations in flexure width(FW) Simulations are carried out in MEMMECH Solver by varying flexure width from 12 µm to 30  µm while keeping flexure thickness same as 50  µm. Following table shows effect of flexure width on sensitivity as well as cross-sensitivity. Table 2: Cross axis sensitivity for various flexure widths of planar structure Flexure Width (In  µm) 12 18 24 30 Sensitivity Sx Sy Sz(In MPa) (In MPa) (In MPa) 330 28 25. 2 150 13 11. 29 83 7. 4 6. 34 54 4. 9 4. 07 % Cross axis Sensitivity 11. 42 11. 48 11. 74 11. 80 Thickness to width ratio 4. 7 2. 78 2. 08 1. 67 3 It can be seen from the above results that as thickness to width ratio reduces cross-sensitivity marginally increases but effecting drastic reduction in sensitivity of the sensor. 3. 2. 2 Variation in flexure thickness (FT) Simulations are carried out in MEMMECH solver by varying flexure thickness from 50 to 125  µm. F ollowing table shows effect of flexure thickness on sensitivity as well as cross-sensitivity. Table 3: Cross axis sensitivity for various flexure thickness of planar structure Flexure Width (In  µm) 50 75 100 125 Sensitivity Sx Sy Sz(In MPa) (In MPa) (In MPa) 330 28 25. 220 19 14 160 14 8. 8 130 11 5. 9 % Cross sensitivity 11. 42 10. 73 10. 34 9. 60 Thickness to width ratio 4. 17 6. 25 8. 33 10. 42 The simulation results show noticeable reduction in cross-sensitivity as the thickness to width ratio increases. This is because as the flexure becomes more and more stiff, cross-sensitivity decreases. 3. 2. 3 Variation in Prof mass width (PMW) Simulations are carried out in MEMMECH solver by varying proof mass width. It is varied from 400 µm to 1000 µm. Here the flexure dimensions are kept original as 100 µm X 50 µm X 12 µm (LxWxH). Following table shows the effect of proof mass width on sensitivity as well as crosssensitivity. Table 4: Effect of Proof-Mass Width variation on cross sensitivity of planar structure PM Width (In  µm) 400 600 800 1000 Sensitivity Sz(In MPa) 330 490 660 830 Sx (In MPa) 28 41 54 66 Sy (In MPa) 25. 2 37. 8 50. 5 63. 2 % Cross axis Sensitivity 11. 42 11. 38 11. 20 11. 01 It can be seen from above results that Variations in Proof mass width have negligible effect on cross sensitivity but helps to increase the sensor sensitivity by many folds. This is due to increase in proof-mass weight. 3. 2. Variation of Prof mass thickness (PMT) Simulations are carried out in MEMMECH solver by varying proof-mass thickness. It is varied over from 50 µm to 200 µm. Here also the flexure dimensions are kept as 100 µm X 50 µm X 12 µm (LxWxH). Following table shows effect of proof mass thickness on sensitivity as well as cross-sensitivity. 4 Table 5: Effect of Proof-Mass thickness variation on c ross sensitivity of planar structure PM Thickness (In  µm) 200 150 100 50 Sensitivity Sz(In MPa) 330 250 160 82 Sx (In MPa) 28 16 6. 8 1. 6 % Cross axis Sy Sensitivity = RMS of Sx (In MPa) &Sy / Sz 25. 2 11. 42 13. 57 8. 39 5. 47 5. 45 0. 95 2. 27 It can be seen from above results that cross-sensitivity decreases considerably with decrease in Proof Mass thickness but at the heavy cost of sensitivity. This due to decrease in proof mass weight. Fig No. 3 gives summary of variation in cross-sensitivity with respect to each of the above discussed parameters. Cross Axis Sensitivity for various geometrical parameters. 14. 00 12. 00 % cross-sen. 10. 00 8. 00 6. 00 4. 00 2. 00 0. 00 1 2 3 4 FT PMW FW PMT Fig 3: Graph of summary of variation in cross-sensitivity for geometrical parameters The proof mass width and flexure thickness doesn’t have much impact on cross sensitivity. In case of flexure width variation, cross sensitivity decreases along with increase in flexure width. The bending stress caused by transverse acceleration in X, Y direction is much less then stress caused by desired acceleration in Z direction. Thus for low cross-sensitivity, Ratio of width to thickness should be high. These results have good agreements with earlier reported results [7-8] 4) Conclusions A cross sensitivity effect is studied by varying geometrical parameter like thickness as well as width of flexure and proof mass. Following conclusions can be drawn from all of the above simulation Skewed structure has much higher cross-sensitivity as compared to planar type of structure for the same thickness to width ratio of flexure. (Compare values of in table 1 and 2 for thickness to width ratio of 4. 17). But they have similar sensitivity. When Thickness to Width ratio is increased to 8. 33 in case of skewed structure its crosssensitivity drastically reduces but is still higher than plan structure. One can safely increase sensor sensitivity by increasing proof mass weight by increasing width in planar structure. Variations in flexure thickness and Proof Mass width doesn’t affect cross ensitivity. For better low cross-sensitivity, thickness to width ratio of flexure for planar type of design should be as low as possible and further sensitivity can be enhanced by increasing proof mass width. 5 Acknowledgements The authors thank ARDE, Pune, Ministry of Defence for funding the research work on development of micro accelerometer at University of Pune. Shri BP Joshi, Scientist ‘F’, would like to thank Director ARDE for giving opportunity to work on the project and also to Dr. S. K. Salwan (Guide for Ph. D. ) for his valuable guidance and suggestions. References 1. J. A. Plaza, J. Esteve, E. Lora-Tamayo, Simple technology for bulk accelerometer based on bond and etch back silicon on insulator wafers, Sensors and Actuators, A68, 1992, p199-302 2. Aaron Partridge, J. Kurth Reynolds, Benjamin W. Chui, Eugene, M. Chow, A HighPerformance Planar Piezoresistive Accelerometer, JMEMS, vol 9, No. 1, March 2000, p 58-66. 3. R. P. Van Kampen, R. F. Woffenbuttel, Modelling the mechanical behaviour of bulkmicro machined silicon accelerometers, Sensors and Actuators, A64, 1998, p137-150 4. L M Roylance and J B Angell, â€Å" A batch fabricated silicon accelerometer. IEEE Trans. Electron Devices, vol. ED-26. pp. 1911-1917. Dec. 1979. 5. Sabrie Soloman, Sensors Handbook, MGH Publications, 1998 pg no 66. 31 6. Kaiyu chen. A survey of piezoresistive semiconductor accelerometer. EE663 microelectronic sensor project report. 7. H. crazzolara, G. Flach, W. von Munch. Piezoresistive accelerometer with overload protection and low cross-sensitivity. Sensor and actuators A . 39(1993)201-207 8. Homg chen, Mihang bao. A piezoresistive accelerometer with novel vertical beam structure. Sensor and actuators. A63(1997) 19- 25. 6

Mephibosheth Guest Speaker †Economics Essay

Mephibosheth Guest Speaker – Economics Essay Free Online Research Papers Mephibosheth Guest Speaker Economics Essay Private organizations are often more effective than the established government in the less-developed nations of the world. The majority of nations do not have a system in place to help the needy, whether it is a lack of financial capability, or a lack of a coherent and organized political or institutional structure that is able to administer these services to the people. NPOs can help to fill in this gap by providing the needy everything from basic food and medical supplies to job and occupational training to help people provide for themselves and their families. Mephibosheth seems to be providing many communities around the world with job and skill training, with which the trainees can then use to operate their own business or self-sustaining community. Working with families and young people is important in determining the economic and political future of a nation. People trained with basic economic skills will be able to improve the lives of the people around them, and perhaps influence and create the future leaders of that nation, who may then be able to use their positions of power to further help for the poor. However, in the current stage of Mephibosheth’s operations, teaching people skills that they can use to make a living with is a vast improvement from their previous condition – no skills to make money with, no capital to start a business venture with, no chance of government aid, and most importantly, little to no hope for a better future. The first thing I found interesting about Mephibosheth’s approach is that everyone has to contribute something in return for whatever they receive, like the children picking up firewood to get a meal. I found it interesting, because it is different from a simple handout from the organization, and instead teaches people that nothing is truly free in this world, and labor and time is necessary to accomplish something, much like the concept of opportunity cost, and how there is â€Å"no such thing as a free lunch.† The second thing I found interesting is that one school in South America, which looked remarkably large, and more like a high-rise apartment complex. I was just wondering exactly how much that facility cost, and how much money Mephibosheth is receiving from donors, and how much they need to operate and run their operations across the world. Research Papers on Mephibosheth Guest Speaker - Economics EssayAssess the importance of Nationalism 1815-1850 EuropeNever Been Kicked Out of a Place This NiceThe Effects of Illegal ImmigrationPETSTEL analysis of IndiaInfluences of Socio-Economic Status of Married Males19 Century Society: A Deeply Divided EraCapital PunishmentOpen Architechture a white paperIncorporating Risk and Uncertainty Factor in CapitalTwilight of the UAW

Feldspar Distinctions, Characteristics Identification

Feldspar Distinctions, Characteristics Identification Feldspars are a group of closely related minerals that together are the most abundant mineral in the Earths crust. A thorough knowledge of the feldspars is what separates geologists from the rest of us. How to Tell Feldspar Feldspars are hard minerals, all of them with a hardness of 6 on the Mohs scale. This lies between the hardness of a steel knife (5.5) and the hardness of quartz (7). In fact, feldspar is the standard for hardness 6 in the Mohs scale. Feldspars usually are white or nearly white, though they may be clear or light shades of orange or buff. They usually have a glassy luster. Feldspar is called a rock-forming mineral, very common, and usually makes up a large part of the rock. In sum, any glassy mineral thats slightly softer than quartz is very likely considered a feldspar. The main mineral that might be confused with feldspar is quartz. Besides hardness, the biggest difference is how the two minerals break. Quartz breaks in curvy and irregular shapes (conchoidal fracture). Feldspar, however, breaks readily along flat faces, a property called cleavage. As you turn a piece of rock in the light, quartz glitters and feldspar flashes. Other differences: quartz is usually clear and feldspar is usually cloudy. Quartz appears in crystals more commonly than feldspar, and the six-sided spears of quartz are very different from the generally blocky crystals of feldspar. What Kind of Feldspar? For general purposes, like picking granite for a countertop, it doesnt matter what type of feldspar is in a rock. For geological purposes, feldspars are quite important. For rockhounds without laboratories, its enough to be able to tell the two main types of feldspar, plagioclase (PLADGE-yo-clays) feldspar and alkali feldspar. The one thing about plagioclase thats usually different is that its broken faces- its cleavage planes- almost always have fine parallel lines across them. These striations are signs of crystal twinning. Each plagioclase grain, in reality, is typically a stack of thin crystals, each with its molecules arranged in opposite directions. Plagioclase has a color range from white to dark gray, and its typically translucent. Alkali feldspar (also called potassium feldspar or K-feldspar) has a color range from white to brick-red, and its typically opaque. Many rocks have both feldspars, like granite. Cases like that are helpful for learning to tell the feldspars apart. The differences can be subtle and confusing. Thats because the chemical formulas for the feldspars blend smoothly into each other. Feldspar Formulas and Structure What is common to all the feldspars is the same arrangement of atoms, a framework arrangement, and one basic chemical recipe, a silicate (silicon plus oxygen) recipe. Quartz is another framework silicate, consisting only of oxygen and silicon, but feldspar has various other metals partly replacing the silicon. The basic feldspar recipe is X(Al,Si)4O8, where X stands for Na, K, or Ca. The exact composition of the various feldspar minerals depends on what elements balance the oxygen, which has two bonds to fill (remember H2O?). Silicon makes four chemical bonds with oxygen; that is, its tetravalent. Aluminum makes three bonds (trivalent), calcium makes two (divalent) and sodium and potassium make one (monovalent). So the identity of X depends on how many bonds are needed to make up the total of 16. One Al leaves one bond for Na or K to fill. Two Als leaves two bonds for Ca to fill. So there are two different mixtures that are possible in the feldspars, a sodium-potassium series and a sodium-calcium series. The first is alkali feldspar and the second is plagioclase feldspar. Alkali Feldspar in Detail Alkali feldspar has the formula KAlSi3O8, potassium aluminosilicate. The formula actually is a blend ranging from all sodium (albite) to all potassium (microcline), but albite is also one endpoint in the plagioclase series so we classify it there. This mineral is often called potassium feldspar or K-feldspar because potassium always exceeds sodium in its formula. Potassium feldspar comes in three different crystal structures that depend on the temperature it formed at. Microcline is the stable form below about 400 C. Orthoclase and sanidine are stable above 500 C and 900 C, respectively. Outside the geological community, only dedicated mineral collectors can tell these apart. But a deep green variety of microcline called amazonite stands out in a pretty homogeneous field. The color is from the presence of lead. The high potassium content and high strength of K-feldspar make it the best mineral for potassium-argon dating. Alkali feldspar is a crucial ingredient in glass and pottery glazes. Microcline has a minor use as an abrasive mineral. Plagioclase in Detail Plagioclase ranges in composition from Na[AlSi3O8] to calcium Ca[Al2Si2O8], or sodium to calcium aluminosilicate. Pure Na[AlSi3O8] is albite, and pure Ca[Al2Si2O8] is anorthite. The plagioclase feldspars are named according to the following scheme, where the numbers are the percentage of calcium expressed as anorthite (An): Albite (An 0–10)Oligoclase (An 10–30)Andesine (An 30–50)Labradorite (An 50–70)Bytownite (An 70–90)Anorthite (An 90–100) The geologist distinguishes these under the microscope. One way is to determine the minerals density by putting crushed grains in immersion oils of different densities. (Albites specific gravity is 2.62, anorthites is 2.74, and the others fall in between.) The really precise way is to use thin sections to determine the optical properties along the different crystallographic axes. The amateur has a few clues. An iridescent play of light can result from optical interference inside some feldspars. In labradorite, it often has a dazzling blue hue called labradorescence. If you see that its a sure thing. Bytownite and anorthite are rather rare and unlikely to be seen. An unusual igneous rock consisting of only plagioclase is called anorthosite. A noteworthy occurrence is in New Yorks Adirondack Mountains; another one is the Moon.

Indirect Questions in English for ESL Learners

Indirect Questions in English for ESL Learners Indirect questions are a form used to be more polite in English. Consider the following situation: You are talking to a man at a meeting that you have never met. However, you know his name and also that this man knows a colleague named Jack. You turn to him and ask, Where is Jack? You might find that the man seems a little bothered and says he doesnt know. He isnt very friendly. You wonder why he seems bothered. Its probably because you didnt introduce yourself, didnt say excuse me, and- most importantly- you asked a direct question. Direct questions might be  considered rude when speaking to strangers. To be more polite we often use indirect question forms. Indirect questions serve the same purpose as direct questions but are considered more formal. One of the main reasons for this is that English does not have a formal you form. In other languages, its possible to use the formal you in order to make sure you are polite. In English, we turn to indirect questions. Forming Indirect Questions Information questions are posed using the question words where, what, when, how, why, and which. In order to form an indirect question,  use an introductory phrase followed by the question itself in positive sentence structure: Introductory phrase question word   positive sentence Connect the two phrases with the question word or ‘if’ in the case the question is a yes/no question. that begins without a question word. Examples Where is Jack? I was wondering if you know where Jack is.When does Alice usually arrive? Do you know when Alice usually arrives?What have you done this week? Can you tell me what youve done this week?How much does it cost? Id like to know how much it costs.Which color suits me? Im not sure which color suits me.  Why did he leave his job? I wonder why he left his job. Common Phrases Here are some of the most common phrases used for asking indirect questions. Many of these phrases are questions (i.e., Do you know when the next train leaves?), while others are statements made to indicate a question (i.e., I wonder if he will be on time.). Do you know †¦ ?I wonder / was wondering †¦.Can you tell me †¦ ?Do you happen to know ...?I have no idea ...Im not sure ...Id like to know ... Sometimes we also use these phrases to indicate that wed like some more information: Do you know when the concert begins?I wonder when he will arrive.Can you tell me how to check out a book.I’m not sure what he considers appropriate.I don’t know if he is coming to the party this evening. Quiz Now that you have a good understanding of indirect questions. Heres a short quiz to test your understanding. Take each direct question and create an indirect question with an introductory phrase. What time does the train leave?How long will the meeting last?When does he get off work?Why have they waited so long to react?Are you coming to the party tomorrow?Which car should I choose?Where are the books for the class?Does he enjoy hiking?How much does the computer cost?Will they attend the conference next month? Answers The answers use a variety of introductory phrases. There are many introductory phrases that are correct, only one is shown. Make sure to check the word order of the second half of your answer. Can you tell me what time the train leaves?I have no idea how long the meeting will last.Im not sure when he gets off work.  Do you know why they have waited so long to react?I wonder if you are coming to the party tomorrow.Im not sure which care I should choose.Can you tell me where the books for the class are?I dont know if he enjoys hiking.Do you happen to know how much the computer costs?Im not sure if they will attend the conference next month.

Forum 3 research methods Essay Example | Topics and Well Written Essays - 500 words

Forum 3 research methods - Essay Example It was found that people who wanted the inclusion of homosexuals into the protected group supported the hate crime law whereas others that wanted homosexuals out of the protected group rejected the hate crime law. As contained by the theory of identity politics, the data-supported path model helped the researchers find that the people who considered the hate crimes a source of fear among the victim group’s members as well as the economic and social liberals raised their support for the inclusion of the homosexuals into the hate crime laws. Rest of the research findings were not consistent with the theory of identity politics that considers the movement a united front. A surprising finding of the research was that the likelihood of belief in the increase of hate crimes was found to be more in the social conservatives as compared to the economic conservatives. All variables possibly having some kind of indirect or direct relationship with the dependent model included in the study were displayed in the form of a skeletal model shown in the article as Fig. 1. The skeletal model’s fundamental dependent variable was the general extent of support of a respondent for a hate crime law containing the condition of penalty enhancement. The definition of a variable as the dependent or independent variable depended upon the regression. In total, seven regressions were performed. In the first regression, the dependent variable in the skeletal model i.e. general hate crime law attitude was shown towards the extreme right with all of the independent variables towards the left. In the subsequent six regressions, â€Å"the dependent variables were homosexual inclusion, verbal aggression inclusion, hate crimes increased, fear among other group members, social liberalism/conservatism, and economic liberalism/conservatism† (Johnson and Byers, 2 003, p. 232), whereas the independent variables in these six regressions were all variables towards the left of but not above or

British Avante Garde Films Essay Example | Topics and Well Written Essays - 2000 words

British Avante Garde Films - Essay Example In spite of their seeming records for a status in a new anti-realist genre (including crime films and science fiction film), most of them were placed in the sunset world of lukewarm black and white B-movies. Such censures ultimately could stir the scholars and experts a bit and in recent times there is a sturdy growth in publications on British cinema although compared to the American scene the subject is still suffers from a relative lack of material. The tidy and wide contours the Hollywood cinema attained during the fifties and sixties and profited from the growth of film studies in the seventies. This is yet to be imitated in British cinema. Among the many revealing dealing of British film history Sarah Street's book British National Cinema (published in 1997). Street shows that "there is no such thing as a typical British film" (198). She , in this book has made a much more fascinating study by explaining the range in British movie making while revealing its evident historical trends - a study that could really snub those critics who always jeer at British cinema for not being "particularly interesting or worthy of study" (199). Here, she has traced the growth of the British Film industry, from the Lumiere brothers' first viewing in London in 1896, the manipulative power of Hollywood and the harsh financial disasters that affected British films. Sarah Street uses the ideas of 'official' and 'unofficial' cinema showing how British cinema has been both 'respectable' and 'disreputable' and eventually making us reveal why British cinema has constantly been treated indifferently by the authority and administration. Comparing Britain and Hollywood, Sarah asks what was the real historical and social function of the British 'star system'."British films" are always films that have been produced in England rather than Scotland, Wales and Ireland, or to be even more exact films made in London and its outer suburbs. Another interesting point here is the way "British Cinema" clutches "British-ness", the historical, cultural, social and psychological factors, traditions and values that most frequently linked with the British identity involving the duty to rebuild the British cinematic image implying the national identity. British film industry had the same starts and novelties as its foils in Europe and America and that all through its history it was both part of a larger cinematic society and it had to deal with same challenges as other national film industries. The British cinema has a history as lengthy as the history of cinema itself. There are also directors i n British cinema that can gloriously be entitled as "the inventor of cinema", the most remarkable among them being William Friese-Greene (1855 -1921), a portrait photographer turned film director, who, just like his French and American matching parts, was working for the creation of the cinematographic tools and is referred by many as the initiator in motion photography. He was a creator who conducted tests with moving image devices at the beginning of cinema that, after his death, was claimed