Smart Phones by Conch Republic Case Study Example | Topics and Well Written Essays - 1000 words

Smart Phones by Conch Republic - Case Study Example Currently the company has its smart phone model in the market which has already earned company a good chunk of revenues. However, with the passage of time, Conch Republic keeps on investing more money in its research and development activities so that its major products continue to exist in the market without getting obsolete. As a result, the company has developed a new model of the existing smart phone which has different new features but the most popular one is that of Wi-Fi tethering. The company has planned to terminate the production of the existing smart phones in next two years, but have made the financial viability of the introduction of new smart phones. The proposed smart phones are estimated to have the useful life of around five years. The company has already incurred around $750,000 and $200,000 on the development of the prototype and the marketing campaign of the new smart phones respectively. However, both of these costs are not included in the investment appraisal co mputation of the new smart phones because they are assumed to be the sunk cost. Sunk costs are those which do not matter whether a certain project is either accepted or rejected, in this way, these two costs would have no impact upon the decision to accept or reject the new smart phone. ... Therefore, in the computation of net cash flows, the impact of loss of contribution in the existing smart phone model due to introduction of new smart phones, are also included and they are considered as a cash outflows. Assumptions All the amounts included in the computation are US Dollars ($). Taxes are assumed to be paid to the authorities in the year in which the tax liability of Conch Republic arises. Impact of inflation is ignored. Discount factor for Conch Republic is estimated to be 12%. Depreciation rates are assumed to 5-years MACRS. Conch Republic is assumed to pay tax at the rate of 35%. Investment Appraisal The project of introduction of new smart phones by Conch Republic has been mainly appraised with the help of traditional investment appraisal techniques which are Discounted Payback Period, Profitability Index, Internal Rate of Return and lastly but the most famous one, Net Present Value. The most important factor which is common in all the above mentioned techniques is the use of discounted cash flows so that the impact of time value of money can managed appropriately (Brigham et al, 2008). The main stream presentation of the computation of the overall investment appraisal of the new smart phones is attached at the end of this discussion along with workings of changes in working capital and loss of contribution of the existing smart phones due to launch of new smart phones. 1. Discounted Payback Period (PBP) Discounted Payback Period mainly depicts the duration in which the initial investment of any project is likely to be recovered (Eckbo, 2008). For the proposed new smart phones, the discounted payback period is found to be 3.94 years which means that in around 3.94 years, there is likelihood that the initial investment of $38.5 million is

Springsteens The Ghost of Tom Joad relationship with Steinbecks Grape

In 1995, Bruce Springsteen produced an album titled â€Å"The Ghost of Tom Joad†. Its title track brings out a lot of ideas from John Steinbeck’s Pulitzer Prize winning novel, The Grapes of Wrath. Migrant workers, as explained in chapter twenty three of The Grapes of Wrath, used music as a main source of entertainment. They would play the harmonica, the guitar, and the fiddle, while the other workers would dance and be jolly, despite how bad the work was that day. The instrumentals of the song are harmonica and acoustic guitar. This helps to bring out both the theme of the song and the ideas from the book. The seventh line of the song is â€Å"Families sleepin' in their cars in the southwest† (The Ghost of Tom Joad 1995). In the book, while the families were driving through the southwest to find better jobs in California, some families were only able to sleep in their cars. Most families could barely afford the cars they were traveling in, let alone a nice place to stay along their journey. The eighth line is, â€Å"No home no job no peace no rest† (The Ghost of Tom Joad 1995). These eight word phrase says a lot. The migrant workers had no home, at least not a stable one. This was because they had no steady job. They were never really at peace with themselves, for they could not forgive themselves for leaving their land in Oklahoma. They had trouble getting rest because they were always so hungry. This one line almost completely sums up the lives of the migrant workers characterized in this novel. The next two lines, â€Å"The highway is alive tonight, But nobody's kiddin' nobody about where it goes† (The Ghost of Tom Joad 1995), are talking about Route 66. This highway is the one that all of the Okies traveled on to get to Califo... ...e." (The Ghost of Tom Joad 1995) This final verse explains what Tom says when he is leaving the family so that they don’t have an extra mouth to feed. When he leaves, after killing a second man, he tells his mom that he plans to carry on Casy’s plans of unionization. He says that he will be everywhere that the migrant farm workers, his people, are starving and being treated unfairly. I believe it is obvious that Steinbeck’s The Grapes of Wrath greatly influenced Bruce Springsteen’s The Ghost of Tom Joad. There is much evidence to prove it. Even the title of the song proves it. There is no way that u can say there is no connection between the two wonderful works of art. Works Consulted Springsteen, Bruce. "The Ghost of Tom Joad." By Bruce Springsteen. Rec. 1995. The Ghost of Tom Joad. Steinbeck, John. New York, New York: Penguin Classics, 1939.

Dimmesdale the Lying Coward

Cooper Chisum Dimmesdale the Lying Coward In the book The Scarlet Letter, a character named Reverend Arthur Dimmesdale was considered to be, by most people in the Puritan community, a hero. Dimmesdale was an extremely religious man with great morals and values. Many people in the community looked up to him for his passion and truth about his religious beliefs. Dimmesdale was a very reserved man, and was thought to be an angel of God. People worshiped him, believed what he said, and looked at him as hero.Unfortunately the community was left completely devastated and confused, because Dimmesdale was a lying coward that didn’t find the strength to admit his sin. Dimmesdale knew how the community saw him and could not face the truth, so he hid it. Dimmesdale lived two different lives, one was the religious face that everyone loved and looked up too. On the other hand, when he was alone all he did was beat himself up mentally and physically.Soon the guilt made Dimmesdale weaker and weaker and he wanted to tell the truth, and tried multiple times, but he never found the courage. He allowed the guilt of lying and manipulating the people to eventually kill him all because he couldn’t deal with what the community might think. Nobody in the town imagined him committing of sin of any kind, especially one that was a huge wrong doing in the Puritan community. Dimmesdale hid a secret behind the mask he wore for the community. He had courage to commit the sin but he did not have the courage to admit it.He committed adultery with a woman, she got pregnant, caught and punished by public humiliation because of him, but he couldn’t accept the consequences. On the other hand, he was tortured not only by his conscience; he was beat down by Roger Chillingworth. Eventually Dimmesdale was destined to die because he could not survive the guilt. Surprisingly in a last show of strength, Dimmesdale admits to his sin, but dies soon after. He died and left the community , his people with no explanation.In the novel The Scarlet Letter by Nathanial Hawthorne, Dimmesdale proves that he is a coward by not being able to do the right thing and tell the truth. He lived a double life. He was a hero to so many people and all he did was let them down. He lost their trust and honor towards him, all because he could face the consequenses. Arthur Dimmesdale is a pathetic lying coward that didn’t have the confidence or power to make things right and follow what he preached to people of the Puritan community. He didn’t have the courage to live by everything he made other people believe in.

Kentucky Vital Records - Marriage, Death Births

Learn how and where to obtain birth, marriage, and death certificates and records in Kentucky, including the dates for which Kentucky vital records are available, where they are located, and links to online Kentucky vital records databases. Kentucky Vital Records: Kentucky Department for Public HealthOffice of Vital Statistics275 East Main Street - IE-AFrankfort, KY 40621Phone: (502) 564-4212Fax: (502) 227-0032 What You Need to Know:Personal check or money order should be made payable to Kentucky State Treasurer. Call or visit the Web site to verify current fees. All requests MUST include the signature and a photocopy of a valid photo ID of the individual requesting the record. Web site: Kentucky Office of Vital Statistics Kentucky Birth Records Dates: From 1911 (statewide); selected counties from 1852 Cost of copy: $10.00 Comments: Access to birth records in Kentucky is not restricted by law.  With your request, include as much as you can of the following: the name on the birth record being requested, date of birth, place of birth (city or county), fathers full name, (last, first, middle), mothers full name, including her maiden name, your relationship to the person whose certificate is being requested, your daytime telephone number with area code, your handwritten signature and complete return mailing address.Application for Kentucky Birth Certificate * The Kentucky Department for Libraries and Archives has birth records for the cities of Louisville, Lexington, Covington and Newport, which enacted records collection ordinances before 1911. KDLA also has selected birth records (statewide coverage) covering the years 1852-1862, 1874-1879 and 1891-1910. Consult their website for a list of available birth records by county. Online:Kentucky Vital Records: 1852–1914 is a collection of free, digitized microfilm images on FamilySearch; includes birth records from the 1908–1910 range for many KY counties Kentucky Birth Records, 1847–1911 includes indexes and images (requires subscription to Ancestry.com) Kentucky Death Records Dates: From 1911 (statewide); selected counties from 1852 Cost of copy: $6.00 Comments: Access to death records in Kentucky is not restricted by law.  With your request, include as much as you can of the following: the name on the death record being requested, date of death, place of death (city or county), your relationship to the person whose certificate is being requested, your purpose for needing the copy, your daytime telephone number with area code, your handwritten signature and complete return mailing address. For deaths occurring from 1900 to 1917, the city and/or county of death is required in order to locate the record.Application for Kentucky Death Certificate * The Kentucky Department for Libraries and Archives has death records for the cities of Louisville, Lexington, Covington and Newport, which enacted records collection ordinances before 1911. KDLA also has selected death records (statewide coverage) covering the years 1852-1862, 1874-1879 and 1891-1910. Consult their Web site for a list of available death records by county. Online:Kentucky Death Index 1911-1992 (free) Kentucky Death Certificates and Records 1852-1965 including digitized Kentucky death certificates from 1911-1953 (requires subscription to Ancestry.com) Kentucky Marriage Records Dates: From June 1958 (statewide), but many go back to early 1800s Cost of Copy: $6.00 Comments:  The Kentucky Office of Vital Statistics does not have records of marriages prior to 1958. Copies of marriage certificates prior to June 1958 may be obtained from the county clerk in the county where the license was issued. Send your request to the Clerk of Court in the county where the marriage license was issued.Application for Kentucky Marriage Certificate Online:Kentucky Marriage Index 1973-1993 (free)    Kentucky Divorce Records Dates: Varies by county Cost of copy: Varies Comments: The Kentucky Office of Vital Statistics does not have records of divorces prior to 1958. Records of divorce proceedings prior to June 1958 are available from the clerk of the circuit court that granted the decree. Online:Kentucky Divorce Index 1973-1993 (free) More US Vital Records - Choose a State

Juvenile Delinquency; The Issue Inside - 550 Words

In 2005 approximately 69 million people in the United States were under the age of 18. The projected juvenile population is expected to reach 74 million by 2015. â€Å"Violence itself is not a disorder. It can be one of a number of behaviors used to diagnose mental illness based on severity and circumstance.† (Bilderya 2) Children and teens are becoming more and more violent, committing more crimes, and doing excessive amounts of drugs. This is a major issue because these kids are the next generation. â€Å"Crimes of violence among youth can include fighting, rape, and robbery. Juveniles between the ages of 12 and 17 are more likely to be victims of these significantly correlated with mental illnesses.† (Bilderya 1) Juvenile crime stems from mostly mental and physiological reasoning, from watching parents fight, repeating what is said around the house to just down right low grades., resulting in higher crime rates among adolescents. Delinquency is a rising problem right here in the Michigan, and research shows that most juvenile delinquency comes from issues and illnesses in the brain. What children see/hear at a young age can very well affect them later in life. â€Å"Poor role modeling or mistreatment by parents such as abusive behavior or neglect can start your child down the wrong path† (Fisher 7) Everyday, ordinary things can put the wrong message in a child s mind. Such as the T.V. shows they watch, to the music they listen to. Kids see and hear that the violent and abusiveShow MoreRelatedJuvenile Delinquency Treatment : Description And Fundamental Principles1452 Words   |  6 PagesJuvenile Delinquency Treatment: Description and Fundamental Principles When treating juvenile delinquency the goal is to punish or rehabilitate the problem children after they have offended and been caught. To punish is to induce pain or payment for misconduct, while rehabilitation revolves around productive work pertaining to a program of education, along with counseling of some nature (Musick, 1995, pg. 233). It is typically assumed that adolescents deserve and require distinct management becauseRead MoreBreaking Down the Walls of Delinquency1685 Words   |  7 Pagescrimes. Sometimes a researcher has to get to what he or she thinks is the root of the problem to figure out what spawns a certain issue. What provokes a child to become delinquent and what makes the child gravitate so easily towards this lifestyle? It is necessary to explore how family life influences juvenile delinquency. Juveniles are more likely to become juvenile delinquents if there is little structure provided for them in their families. Children who are rejected by their pare nts, who growRead MoreThe Cost of Culpability: The Significance of Numbers Inside the Criminal Justice System (Age and Economics)1244 Words   |  5 Pages Both juveniles and mentally ill adult offenders fell under the above category, it was possible that one could be found not liable due to their age and mental status’ and win a victory in court that could be categorized as legal injustice. Throughout this paper, inconclusive evidence was found that suggested legal definitions were basically written the same but were interpreted differently by various courts. The only noticeable shifts were found in the application of these terms inside the criminalRead MoreThe Causes of Juvenile Delinquency and Crime Essay1432 Words   |  6 Pagesdirections. A teen’s peers also play a large role in how the teen behaves when the parents are not around. A teen’s social environment, consisting of family and peers, plays a vital role in their life, therefore becoming the ultimate cause of juvenile delinquency. A finding that emerges very strongly and consistently is that delinquents have very poor relationships with their parents† (Gove 303-304). The teens who commit crimes often lack a parental figure in their lives. These teens are not strictlyRead MoreCurrent Correctional System and Rehabilitation934 Words   |  4 Pagesnot career criminals in the first place. In principle, it is impractical to emphasize rehabilitation when there are glaring problems, arbitrary distinctions, and unjustifiable inconsistencies in the criteria for penal incarceration. As a threshold issue, a successful rehabilitation approach would require resolution of these problems. Second, the conditions within the current federal penal system are simply not conducive to a successful rehabilitation approach because there is no genuine attemptRead MoreProfit Over Youth : A Look Into The Business Of Prison950 Words   |  4 PagesPrison. The Office of Juvenile Justice and Delinquency Prevention established that in 2009 there were a total of 1,812,900 juvenile arrest. These arrest consisted of those who were arrested and never tried as adults, for the purpose of this paper the same definition of a juvenile will be used. It can be easily argued that the juvenile population is Americas most vulnerable, and this is the population that we are arresting at such high numbers. To understand why these juveniles are being arrested atRead MoreJuvenile Delinquency And The Juvenile Justice System2169 Words   |  9 Pagesthe factors that contribute to juvenile delinquency and the solutions to correct or prevent this delinquency. In the history of the construction and implementing federal laws, it has been imperative to take actions and make procedures in response to the increasing number of minors who violate the laws. The formation of a juvenile justice system that is made up of proper course and development was created. It is important to point out the reasons why these juveniles do offensive and criminal actsRead MoreJuvenile Crime Is One Of The Country s Not Joking Issues Essay1415 Words   |  6 PagesJuvenile crime is one of the country s not joking issues. Worry about it is shared through elected, state, and neighborhood government authorities and through people in general. In the United States, age cut-off points of juveniles change, the most extreme age being set at 14 years in a few states and as high as 21 years in others. The 16-to 20-year age gather, considered grown-up in many spots, has one of the most unusual occurrences of actual crime. A large degree of grown-up criminals has a foundationRead MoreFice Of Juvenile Justice And Delinquency Prevention1668 Words   |  7 PagesThe Office of Juvenile Justice and Delinquency Prevention (OJJDP) provides leadership and technical assistance in the development, implementation, and operation of new approaches, techniques, and methods related to ju venile justice and delinquency prevention. In 1999, OJJDP created the Safe Start Initiative to prevent and reduce the impact of children s exposure to violence in both the home and the community, and to expand the knowledge base of evidence-based practices. Exposure to violence is definedRead MoreCommunity Based And Residential Delinquency Program896 Words   |  4 PagesAccording to AMIkids.org, even thought AMIkids had a high-risk population most of the youth entering AMIkids community based and residential delinquency program successfully completed the program. In the year 2011 74% of the youth endorsed to an AMIkids group based project finished administrations, expanding from 70% in FY 2005-06. AMIkids has expanded the productivity of programming as of late, with normal lengths of administration diminishing both its group based and private misconduct mediations

Personality Disorders Essay - 1330 Words

There are personality disorders, and then there are extremely troubling personality disorders that haunt you if you have ever met someone who had one. Antisocial personality disorder would be the latter. Often called sociopaths or psychopaths, individuals with Antisocial Personality Disorder exhibit a lack of conscience, and have a complete disregard for the safety of those around them and their self (American Psychological Association [APA], 2000). While half of the teenagers in America exhibit these traits, they are only one part of the criterion for the DSM-IV to diagnose someone with this personality disorder. As adults, individuals with ASPD are often unable to maintain a job or relationships with others as they are irresponsible and†¦show more content†¦In a study, Meloy (2007) found that â€Å"2/3 of all psychiatrists believe that a ‘psychopathic disorder’ can be a treatable condition† (pg 1). The checklist for measuring mild to severe psychopathy takes an interesting perspective and measures several traits that are distinctive to common psychopathic behavior. Glibness, parasitic lifestyle, callousness, promiscuous behavior are only some of the traits that are measured on a scale of 0-2, 0 not fitting at all, 2 fitting them perfectly and then tallied together (Meloy 2007). 10-19 would be only very mild psychopathy, possibly borderline, 20-29 would be moderately psychopathic, and anything over 30 is definitely considered psychopathic for all intents and purposes (Meloy 2007). Biological traits can be often overlooked when diagnosing ASPD, as Conduct Disorder is often thought to be an environmental problem, for example growing up in an abusive family or in a bad neighborhood or being bullied as a child. However, in an experiment composed of 27 males with Early Onset Conduct Disorder or EOCD, 25 males with Adolescent Onset Conduct Disorder or AOCD, and 23 healthy males (those without Conduct Disorder or any other personality disorder for that matter) as the control group, the experiment concluded that there were increased levels of function in the amygdala as compared to the control group on neutral faces (Passamonti et al., 2010). EOCD is thought to be more persistent than AOCD as attributed to more amygdala functionShow MoreRelatedBorderline Personality Disorder And Personality Disorders931 Words   |  4 PagesIntroduction Amad, Ramoz, Thomas, Jardri and Gorwood questioned if borderline personality disorder runs in families through genetics. Although not stated borderline personality disorder was first diagnosed as an illness in 1980. Borderline personality disorder is a common mental disability that causes someone to experience unstable moods and occasionally have psychotic episodes. Gene-environment interaction which is when 2 different genotypes respond to different environmental variation in differentRead MoreBorderline Personality Disorder And Personality Disorders2101 Words   |  9 PagesBorderline Personality Disorder Emani J. Mills Psychology of Personality Catinia Farrington INTRODUCTION â€Å"Personality disorders have been documented in approximately 9 percent of the general U.S. population† (Angstman, Rasmussen, 2011). Emotional dysregulation disorder or its common name borderline personality disorder is a very serious and chronic disorder. 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Since people lack knowledge about the different types of personality disorders, they tend to lack the ability to deal with those type of people. There has always been questions about the symptoms, causes, treatment and involvement in society that involve the Antisocial, Anxiety and Narcissist disorders. We hear aboutRead MoreThe Personality Of Antisocial Personality Disorder1003 Words   |  5 PagesAntisocial personality disorder is a disregard for others rights and violating theses rights. This disorder starts as a child to people who carry this disorder portray the characteristics of irritability, aggressiveness, lack of remorse, and irresponsibility. A psychopath falls under the umbrella of antisocial personality disorders. A psychopath is a person with a personality disorders which is inherited from their parents at birth. Flashes of these inherited factors show and happen in the childRead MorePersonality Disorders : What Causes A Personality Disorder?930 Words   |  4 PagesPersonality disorders is a deeply ingrained pattern of behavior of a specified kind, typically manifest by the time one reaches adolescence and causing long term difficulties in personal relationships or functioning in society. Someone with personality disorder not only effects the person with it but the love ones as well. A question that is always raised while talking about personality disorder is what causes a personality disorder? Some doctors and professor believe that things happen in a person’sRead MorePersonality Theories Of Personality Disorders1497 Words   |  6 Pagesdifferent theories of personality wh ich scientists have developed in order to help explain how people think, feel, and behave. The trait theory of personality is one that attempts to explain personality by identifying patterns of behavior that include relatively stable characteristics which in turn causes individuals to consistently behave in particular ways (Funder, 2015). While personality may change due to different situations or states, the trait theory proposes that overall personality characteristicsRead MorePersonality Of Personality Disorders And The Wpa Section On Personality Disorder1359 Words   |  6 PagesPersonality disorder has being and issue among therapist and psychiatrist. Also Personality disorder is presently being acknowledged as an essential condition in standard psychiatry over the world. In spite of the fact that it regularly stays unrecognized in customary practice, research studies have demonstrated that it is familiar, makes significant bleakness, is connected with high expenses to admini strations and to society, and meddles, generally adversely, with advancement in the treatment ofRead MorePersonality Disorders And Eating Disorders1925 Words   |  8 Pagestypes of disorders. I am personally interested in personality disorders and eating disorders. Now that might sound weird, but what I mean is I find it interesting and want to figure out how it effects people. I want to know how it effects people’s daily life. Now a day’s society glorifies personality disorders such as depression and eating disorders in general. Disorders aren’t something to be glorified they are something that some people struggle with and sometimes can’t live with their disorder or illnessRead MoreThe Personality Of Antisocial Personality Disorder1941 Words   |  8 PagesToday it is estimated that .6 to 4% of the general population are thought to have antisocial personality. (Thompson, 2014) Antisocial disorder is a personality disorder in which a person may have b ehavioral deficits or tendencies not accepted as normal by society’s standard. Antisocial personality disorder is sometimes also known as sociopathy. Someone who has this disorder may be called a sociopath. Some behavioral deficits seen in sociopaths include, superficial charm, pathological lying, lack

Microelectronics Reliability Essay Free Essays

string(52) " latter will be shows in the following subdivision\." Abstraction Micro-Electro-Mechanical Systems or short MEMS, is a engineering that is basically a combination of electro-mechanical stuffs and mechanical technology at a micro graduated table. The engineering used for fiction is derived from the IC fiction procedures and typically ranges from one micrometer to several millimetres. The MEMS engineering finds its usage in assorted applications where for case, micro detectors and/or micro actuators are needed. We will write a custom essay sample on Microelectronics Reliability Essay or any similar topic only for you Order Now As its name suggests, MEMS devices are basically mechanical devices that can dwell of fixed parts or a combination of fixed and traveling parts. However this besides gives rise to dependability issues due to both electrical as mechanical issues [ 2 ] s.a. stuff weariness, stiction, dazes etc. The dependability can be greatly enhanced [ 1 ] turn outing the engineering can be suited for usage in high terminal applications. The end of this essay is to present and familiarise the reader to an extent with the operation and the dependability issues of a MEMS accelerometer. First the working of a MEMS accelerometer will be covered after which its dependability will be considered. Here assorted dependability issues will be considered after which†¦Ã¢â‚¬ ¦..some†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.solutions will be given on how to cover with†¦..some†¦..of†¦..the dependability issues. Finally a decision will be drawn if the presented solution†¦Ã¢â‚¬ ¦.solutions†¦Ã¢ € ¦Ã¢â‚¬ ¦..are bettering the dependability. Introduction MEMS engineering devices have established a repute over the old ages as capable detector and actuator devices doing assorted information garnering techniques possible. The engineering enables applications to garner information from the environment in assorted spheres merely to change over them to the electrical sphere. Following to the electrical sphere, the detectors can be fabricated to observe mechanical, thermic, chemical, magnetic and optical signals. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ Give some more illustrations about the usage and demo some images etc. particularly mention the usage in automotive industry †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ One noteworthy illustration that possibly talk easy to the head is the usage of MEMS detectors in the modern smartphones. The detector enables the phone to observe up from down for assorted maps s.a. exchanging to a larger screen, GPS applications and game characteristics where the phone detects the tilting for playing some games. Figure†¦ ..shows the usage of accelerometers germinating over the old ages. img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.004.png"/ [ 4 ] As the figure points out, the MEMS accelerometer had made its first visual aspect as a clang detector in an airbag. From there it evolved to be used even in playthings where it needs to be inexpensive and is produced in a high volume. However an application in toys doesn’t need to be extremely dependable unlike the usage in application for automotive terminals s.a. the airbag where a life can be saved depending on the right operation of the detector. 1. MEMS accelerometer Basic operation Figures†¦shows a basic MEMS capacitive accelerometer. img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.005.png"img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.006.png"/ [ 4 ] †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ . The MEMS detector shown uses two home bases connected to the cardinal mass w.r.t the fixed home bases as differential capacitances. The electrical capacity is given by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.007.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.008.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.009.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.010.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.011.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.012.png"/ The two home bases attached to the cardinal mass signifier series electrical capacities with the fixed home bases. When there is acceleration the mass will travel in the positive or negative way depending on the motion. This in bend will ensue in positive or negative electrical capacity and depending on the distance the capacitances are smaller or larger. Thus for positive motion one capacitance will increase positively while the other will increase negatively, or frailty versa for negative motion. When there is no acceleration the movable mass will be back at its place due to the snap belongingss of Si which consequences in a place equidistance between each outer plates. This will ensue in zero electromotive force on the cardinal home base as the electrical capacity on each side are equal ( except for the sine ) . This is because the outer home bases can be driven with a square moving ridge with the coveted frequence so that one home base sees a positive signal while the other sees a negative signal, and frailty versa. For positive motion the end product square moving ridge is in stage with the input signal resulting in a greater magnitude when demodulated. For negative motion this is the antonym. The described device has merely two outer home bases which means that the sensitiveness will be low. To increase the sensitiveness the figure off traveling fingers ( outer plates ) must be increased [ 1 ] . However every bit will be shown in the text, the more moving parts in the accelerometer the higher the chance of failure. 2. Common MEMS failure mechanisms Although the MEMS engineering has proved its worth, there are many failure mechanisms that need to be considered when planing to hold a qualitative merchandise at the terminal of the processing. Table†¦ [ 6 ] summarizes the common failure mechanisms of MEMS devices: Failure Cause Mechanical Fracture Overload, daze ; Corrosion ; Fatigue Stiction Van der Waals force ; Capillary force ; Chemical bonding ; Electrostatic charging ; Residual emphasis Charge accretion Electric emphasis ; Radiation ; Improper handling Wear Adhesion ; Abrasion ; Corrosion ; Surface weariness Creep and weariness Intrinsic emphasis ; Applied emphasis ; Thermal emphasis Electric short and unfastened Dielectric stuff debasement ; ESD, high electric field ; Electromigration ; Oxidation Contamination Intrinsic ( e.g. , crystal growing ) ; Manufacturing-induced ; Usage environment-induced As the accelerometer is considered as the instance survey, merely some of the failure mechanisms are of involvement. The most of import failure mechanisms are Mechanical breaks. Following to that stiction is besides of import as the accelerometer contains traveling parts. In ulterior subdivisions some solutions will be presented on how to better some of the failure mechanisms. Mechanical fractures†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ Mechanical break is the most common failure manner and largely is a consequence of Shocks. Dazes are fundamentally sudden accelerations. While usually an accelerometer operates under conditions merely holding to cover low g-shocks s.a. in consumer electronics, auto clang detectors need to defy much more than that to be dependable. Apart from dazes the mechanical failure manner can besides be a consequence of in-use-stiction as a consequence of suspended parts doing contact that under normal conditions doesn’t occur. The latter will be shows in the following subdivision. You read "Microelectronics Reliability Essay" in category "Essay examples" Reducing mechanical breaks To better the MEMS accelerometer assorted methods can be used. One normally used method is to restrict the motion of the cogent evidence mass by implementing a stopper. Figure†¦..shows an execution of the latter. img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.013.png"/ [ 7 ] The T-shaped construction is the stopper. By implementing the stopper, the break of the back uping beams can be avoided as the maximal emphasis on the beams given by the snap is non exceeded. Following to restricting the emphasis it besides prevents the in-use-stiction as the moving parts are prevented from doing contact with the fixed parts. †¦Ã¢â‚¬ ¦..fatigue†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..shocks†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. Stiction Stiction is one of the most common failure mechanisms in MEMS and occurs where suspended constructions are used ( traveling parts ) . When different parts s.a. the fixed fingers in the accelerometer make contact, these can stay affiliated to one another. Figure†¦Ã¢â‚¬ ¦ . [ 6 ] †¦shows some illustrations of sidelong or/and perpendicular stiction. img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.014.png"/ Fig†¦ Examples of assorted stiction ( a ) no stiction ; ( B ) merely sidelong stiction ; and ( degree Celsius ) lateral and perpendicular stiction [ 6 ] . The stiction occurs peculiarly in micromachined constructions where the surface country to volume ratio is big ensuing in a typically little stiffness of reconstructing springs. The stiction can hold assorted causes and most of these can be due to processing, elevated RH degrees and dazes. The adhesion occurs either due to van der Waals, electrostatic forces ( trapped charge ) , capillary forces or a combination of these [ 7 ] . Reducing stiction As the failure mechanisms of MEMS devices are progressively researched, many ways have been proposed to cut down stiction. Some of these where: Modifying the structural stiffness Design of the traveling parts with higher stiffness to get the better of the stiction force Surface chemical science Using hydrophobic surfaces to forestall H2O from coming into contact with the MEMS structures as H2O causes capillary force and hence stiction [ 6 ] . Alternatively a hermetic waterproofing can be used Rough surfaces Rough surfaces reduces the Van der Waals force and with that the stiction Implementing a stopper to restrict the motion of the cogent evidence mass ( see old subdivision ) Anti stiction coating 3. Dependability Definition of the dependability Before discoursing the dependability of an accelerometer, the definition of dependability must be considered. Reliability is defined as the chance of a certain merchandise to execute harmonizing to its specifications within typical operating conditions for the expected life-time [ 2 ] . The expression for this is given by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.015.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.008.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.016.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.017.png"/ As for the failure rate, which is defined as the ratio of the entire figure of failures to the entire operating clip [ 1 ] . Thus ? img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.018.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.008.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.019.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.020.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.021.png"/ For measuring the dependability there are several standard theoretical accounts that can be used, viz. The exponential dependability distribution The binomial dependability distribution The Poisson dependability distribution Weibull dependability distribution In this text the exponential signifier is used for the dependability analysis as its less complex than other lifetime distribution theoretical accounts. Then the dependability is given by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.022.png"/ In world the failure rate is besides a map of clip. The failure rate ( as a map of clip ) follows the behaviour of a bathing tub curve [ 1 ] . img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.023.png"/ [ 2 ] The infant mortality part is caused by merchandise defects and perchance besides by cognize how restrictions like when proving paradigms [ 2 ] , as for the wear-out part, this is merely as its name suggests. Here the chance of no failure before clip T is given by [ 9 ] img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.024.png"/ img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.025.png"/ When ciphering the failure rate for increasing smaller intervals of clip, the jeopardy rate H ( T ) is obtained, with img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.026.png"/ However, because we are sing the exponential failure distribution, the jeopardy rate will be changeless and equal to the failure rate. Here we can see merely the utile clip from the bathing tub curve, that is, most infant mortality failures ( with ruinous defects ) can be filtered out during fabricating trials [ 1 ] . This means that we can see the failure rate to be more changeless and therefore the instantaneous jeopardy rate H ( T ) is merely the failure rate. 4. Dependability of a capacitive accelerometer As was stated in the Introduction subdivision, the capacitive accelerometer will be used for the chance analysis since it’s widely used and needs to be dependable adequate particularly in life endangering state of affairss s.a. auto clangs. The structural diagram of an accelerometer with 2N-fingers is shown in Figure†¦ . img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.027.png"/ [ 8 ] Here the accelerometer consists of fixed and movable parts which all demand to be fault-free. The accelerometer consists of 4 ground tackles, 4 back uping beams, 2N-fixed fingers, one movable cardinal mass and N-movable fingers attached to the cardinal mass. As stated before, utilizing more fingers increases the sensitiveness of the accelerometer. Here the system can be considered as a series theoretical account [ 1 ] because if any of the constituents fail, the whole system fails. For simpleness, the fixed parts can be considered holding perfect dependability as most defects are filtered out during the fabricating trial while the traveling parts can hold a higher dependability of failure. The dependability is so given by ( Rdegree Fahrenheitcorresponds to the traveling fingers ) img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.028.png"/ Therefore the entire failure rate is merely the amount of the failure rates which is given by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.029.png"/ As can be noted, there is a trade-off between the sensitiveness and the failure rate as both are dependent on n-fingers. As the figure of fingers can be increased to better the sensitiveness, this will convey the dependability down. 5. General solution As discussed antecedently the mechanical break and stiction are thermoset of import failure mechanisms. Here it was shows how to cut down these failures and hence besides the dependability. However if the device fails anyway so it’s considered useless. Unfortunately this can hold serious effects if it’s used in airbag systems and therefore the dependability still needs to be higher. To make this a more general attack can be used. This attack makes usage of ‘spare parts’ . If the accelerometer is broken up into smaller faculties connected together with some excess faculties, the latter can be used to replace the faulty faculties. As the faculties can be connected to some circuitry that would feel if the moving parts are faulty, a faulty faculty can be excluded and replaced by a excess one and this procedure is repeated until the redundant parts are used for replacing. This method is known as BISR ( built in self fix ) . Figure†¦..illustrates this. img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.030.png"/ †¦ . Here the k-out-of-n redundancy theoretical account can be used for the analysis [ 1 ] . The k-out-of-n system consists out of n-modules, withK-modules non-faulty to guarantee the right operation of the MEMS system. When utilizing such a system, until all the excess faculties are used and at least one faculty from the chief device is faulty at the clip, so the system can no longer map decently. This means that the system, unlike when merely one chief faculty is used, is a parallel system. Figure†¦.illustrates this. img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.031.png"/ †¦.. As the figure shows a 3-out-4 system is assumed. Notice that merely the moving parts are considered. That’s similar to the one-module device we can concentrate on the moving parts merely as these cut down the dependability at higher rate than the fixed parts. Again the dependability of one faculty can be done similar as for the one faculty device antecedently discussed in text. The dependability is so given by ( Rdegree Fahrenheitcorresponds to the traveling fingers ) img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.032.png"/ Therefore the entire failure rate is merely the amount of the failure rates which is given by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.033.png"/ Notice that unlike earlier, the failure rate is reduced as the figure of traveling fingers are increased for better sensitiveness. This means that the trade-off that had to be made earlier is non made any more and a much better dependability is obtained. The entire dependability of a system is given [ 1 ] by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.034.png"/ Where m is the excess faculty. Therefore in this instance the dependability is given by img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.035.png"/ Inserting the exponential signifier of the dependability for a faculty img alt="" src="https://s3-eu-west-1.amazonaws.com/aaimagestore/essays/1600366.036.png"/ However, utilizing this method besides increases the usage of the figure of back uping beams which in bend reduces the dependability. But in the visible radiation of the improved dependability by utilizing the BISR attack, the overall dependability increases more than is decreases [ 1 ] doing this method really utile. Decision MEMS have proven to be rather utile. However like any merchandise dependability issues can originate. The dependability of MEMS in toys doesn’t need to be all that high while for applications in automotive this needs to be really dependable as a unrecorded can depend on it when used in airbag systems. It has been shown that first it’s best to see the failure mechanisms and to better these which makes a longer lifetime possible. To better the dependability even further the BISR attack can be considered. From this it shows that the dependability can be really high and in the hereafter this attack might be considered to better other types of MEMS detectors. Mentions [ 1 ] X. Xiong, Y. Wu, and W. Jone, â€Å"Reliability analysis of self-repairable MEMS accelerometer, † in Proceedings of the 21st IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems ( DFT ’06 ) , pp. 236–244, October 2006 [ 2 ] Jacopo Iannacci, â€Å"Reliability of MEMS: A position on failure mechanisms, betterment solutions and best patterns at development level† , Center for Materials and Microsystems – CMM, Fondazione Bruno Kessler – FBK, Via Sommarive, 18, 38123 Povo, Trento, Italy, accepted 2014 [ 3 ] Frank CHoLLET, Haobing LIUâ€Å"A ( non so ) short direction to MEMS† , Creative Commons, version 5.1, 2013 [ 4 ] Michael Kraft, Neil M. White â€Å"MEMS for automotive and aerospace applications† , Woodhead Publishing Limited, Cambridge, 2013 [ 5 ] X. Xiong, Y. Wu, and W. Jone, â€Å"Material weariness and dependability of MEMS accelerometers, † in Proceedings of the 23rd IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems ( DFT ’08 ) , pp. 314–322, October 2008 [ 6 ] Ynhan Huang et Al. â€Å"MEMS Reliability Review† , IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY, VOL. 12, NO. 2, JUNE 2012 [ 7 ] Allyson L. Hartzell, et Al. â€Å"MEMS Reliability† , Springer, New York, 2011 [ 8 ] hypertext transfer protocol: //www.fandroides.com/wp-content/uploads/2014/04/8930-62341-How-does-smart-phone-accelerometer-work.png [ 9 ] hypertext transfer protocol: //en.wikipedia.org/wiki/Failure_rate How to cite Microelectronics Reliability Essay, Essay examples