INTRODUCTION
With advancing technology where every day new systems are being designed, functions being implemented, new equipment being used, there are increased chances for damage due to failure of equipment rather components used in making those equipment. Hence the need for reliability of these components is very high so that the system designed is trusted and reliable which can be used for longer period of time.
Moreover, if we can determine the time of failure for an equipment we can save our system by replacing those components and increase the life of system. This forms the basis of the present thesis where the main focus is on finding more accurate reliability model for components using different techniques being supplied earlier and trying to successfully implementation of those models through fuzzy logic.
As most of the systems use semiconductors and devices formed through it, hence the focus is on these semiconductor devices. Also as the semiconductor’s function and performance evolve through various LSIs, ensuring its reliability is a major factor under consideration.
As a matter of fact, there had been many traditional approaches in predicting the reliability such as MIL-HDBK, Telcordia, and PRISM etc. In the same race Physics of Failure also gained importance and a Modified Physics of Failure method was suggested. Still finding the scope of improvement or say implementing the method through fuzzy logic, it could give us a clear and user friendly picture of its Industrial importance.
The different failure mechanisms which have high possibility of appearing at wafer level is given as-
1. Electro Migration (EM) - This is a failure mechanism where electrons flowing through metal (Al, Cu) lines collide physically with th...
... middle of paper ...
... All this combine to give useful life of device which is different from that predicted by traditional methods. Hence, realizing the major factor that lead to device failure that is, Physics of Failure method, is a more realistic approach to reliability prediction. As its importance and usefulness have been sighted in the two discussed paper, the goal of the thesis is to extend its work towards fuzzy system and efficient use of artificial techniques.
AIM & OBJECTIVE
Short idea of Modified Physics of Failure has been proposed in the Paper 5 being discussed as given below.
The objective is to use this approach and insert two blocks. 1. Fuzzy logic block user friendly implementation. 2. Artificial Neural Network for Decision making to choose best possible way to determine reliability of the devices.
The proposed model is-
Modified proposed model
This section outlines and describes the various elements of the program logic model (see Figure 2). Our logic model is an important evaluative tool as it helps to explain the ideas behind the development of the DCD guidelines and the reasons why DCD programs will lead to positive outcomes in deceased organ donation.
It is generally perceived that electronics are not intended for reuse. In the event that it is completed accurately, hardware reusing can anticipate contamination, make occupations, and spare assets as specified by Thomas, Valerie.... ... middle of paper ... ... The Web.
However, there are times when the communication signals between the assembly line and integrated manufacturing aren’t clear, or a work center in integrated manufacturing is offline while it is being repaired. When these miscommunications and repair issues happen it o...
...ial approaches which are Normal Accident and HROs, although it seems certain that both of them tends to limit the progression that can contribute toward achieving to highly protective systems. This is because the scope of the problems is too narrow and the potential of the solutions is too limited as well. Hence, Laporte and Consolini et.al., (1991) as cited in Marais, et.al., (2004) conclude that the most interesting feature of the high reliability organization is to prioritize both performance and security by the managerial oversight. In addition, the goal agreement must be an official announcement. In essence, it is recommended that there is a continuing need in the high risk organizations for more awareness of developing security system and high reliability environment in order to gain highly successful method to lower risk in an advance technology system.
There are various forms, subsets, and perspectives on knowledge. Intensively discusesed in the book is the concept or propositional knowledge, which is usually the answer when asked what knowledge is. The idea behind propositional knowledge is within knowing something is that way. For example, people make claims such as that George Washington was the first president of the United States in the late 1700s. This type of knowledge is separated from knowledge by acquaintance and knowing how. Knowledge by acquaintance comes from personal experiences or our senses. An example of such would be the knowledge of how chocolate tastes because you have tasted it before. As we can see by the title, which includes the word acquaintance, the knowledge derives
This story is that, during the mid 21 century, because of the thaw of the iceberg that was floating in the Arctic, thus human created the Artificial Intelligence to help themselves to face the terrible environment easily. David is a robot like them. But he is the only one that is written into the love. As the first robot has love, he became the experimental article to be a kid for a couple who lost their son. As the time goes by, David still can’t join this family, and the couple thinks he can’t rather than their son exactly, so they make a decision to send to the company that created him to destroy him. However, they didn’t want to finally, but David can’t stay with them anymore. David thinks they don’t like him because he is not a real boy, if he can be a real boy, he will hear stories by his mother before he goes to bed, although he never need to sleep. So he still has a dream that one day, he will be a real boy, because he wants to be with his mother. His best friend and guide, Teddy helped him to find his dream and he says he will see him become a real boy. There is only one hope, Blue Fairy can help him to achieve him dream. However, you know, he did find her, but he was freezed with his best hope, Blue Fairy...
A failure analysis is the process of collecting data and analyzing it to determine the cause of failure and then applying this knowledge to further prevent future occurrence, and/or to improve the performance device, component or structure. In an engineering point of view, this is very important as it allows engineers to understand and learn about past failures in engineering and using this newly gain knowledge, they are able to construct a better design which will lower fail rate and improve the factor of safety within device, components of structure.
The concept of Multiple Intelligences has come out after Howard Gardner redefined intelligence. According to Gardner’s theory, human beings have different types of intelligence and based on their respective intelligence types, human beings have different skills in different areas. Human beings can be more successful and productive on areas they are skillful. Therefore, choosing appropriate professions, in accordance with one’s intelligence type, is important for individuals as well as for the society. This study aims to develop a technique to help high school students in the profession selection process using artificial intelligence. Questionnaire has been utilized as the research method and the data have been analyzed via Fuzzy Logic Toolbox which is subunit of the software called MATLAB. It was aimed to direct students to appropriate profession and build more successful and productive professions.
Reliability is one of the most important factors in circuit design. For modern CMOS technology, the circuit reliability is influenced by the shrinking of technology, the reduced supply voltage, higher frequency, and higher circuit density. These factors affects the circuit's probability of soft errors (also called single event upset). In addition, the process variation introduced in the fabrication process is also a big challenge for circuit designers because it makes the same circuit show different characteristics. Moreover, to reduce power consumption of the circuit, the method of reducing supply voltage to near threshold region is used, which is anticipated to have more effects on the reliability of the circuit. So the relationship between single event effect and process variation under near-threshold supply voltage should be analyzed and discussed.
Let be the conditional hazard function for the time to first failure for a given dump truck. As it is a repairable item, then failures are appropriate to model using the conditional hazard function . It is considered as a non-decreasing function of the age t and the usage rate y. We assume that is given by which is allowed to incorporate the age and usage for modeling the degradation the truck. As in general the usage rate does more impact to the degradation of the equipment, where . In other words, the truck with high usage intensity degrades much faster than that of the truck with low usage intensity . Furthermore, for a given truck, if all failures under the lease contract are minimally repaired and repair times are very small relative to the mean time between failures, then failures follow a non-homogeneous Poisson process (NHPP) with intensity function
... failure, only 650 failures recorded, which only covers 7.1% of the whole errors made by the workers or robots in the factory. This means high load level has 7.8 times increased risk or failure rate compare to low load level, and moderate load level obtained 5.3 times.
...mpany up and running through any kind of interruptions such as power failures, IT system crashes, natural or man-made disasters, supply chain/vendor problems and more.
Smith, PHD (an associate professor of economics at the Graziadio School of Business and Management at Pepperdine University), 6% of data losses is the result of software corruption and 40% is due to hardware failure. So what does this have to do with using up-to-date technology? Choosing to save money today by using unsupported software and outdated hardware are primary reasons for software corruption and hardware failure. Even more, there’s nothing more frustrating than losing data or having a hardware failure that brings employees to a grinding halt and negatively impacts
A hazard is a potential damage, adverse health or harm that may effects something or someone at any conditions. Other than that, the risk may be high or low, that somebody could be harmed depending on the hazards. Risk assessment is a practice that helps to improve higher quality of the develop process and manufacturing process. It is also a step to examine the failure modes of the product in order to achieve higher standard of safety and product reliability. Unfortunately, it is common that a product safety risk assessments are not undertaken, or not carried out effectively by manufacturer. Mostly an unsafe and unreliable product was produced and launched on to the market. Thus, the safety problems are mostly identified after an accident happened or after manufacturing problems arisen. In order to prevent risk, a person should take enough precautions or should do more to prevent them because as a user should be protected from harm that usually caused by a failure for whom did not take reasonable control measures.
A computer is a device which is used for several applications; business, gaming, or school. It’s important for people to know how computers work because in this day and age, operating a computer is an everyday task. This complex electrical device utilizes several parts inside of it to keep itself cool, conduct the proper tasks, and maintain stability. These devices can be found several places whether it be on the job, in one’s room, or on a school campus. Computers are essential for everyday use in order to complete what is required. What each component is and its function will be described.