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Usability has long been recognized as an important software quality attribute and it has become essential in web application development and maintenance. However, it is still hard to integrate usability evaluation and improvement practices in the software development process. Moreover, these practices are usually unaffordable for small to medium-sized companies. In this position paper we propose an...
Initial contract award in January 2008 for more than 450 Automatic Wire Test Sets (AWTS) by the U.S. Armed Services, Eclypse International has worked recent integration with end users in the field to support maintenance and troubleshooting of Electrical Wiring Interconnect Systems (EWIS) predominantly on aircraft. This paper and discussion will provide a snapshot of our efforts with the 160th Special...
Automated Test Systems (ATSs) can join the Internet of Things (IoT) at multiple layers and benefit both the overall IoT concept as well as advance the goals of ATSs. Logistics and sustainment are traditionally brought into the IoT conversation through asset tracking, transportation, and Health and Usage Monitoring Systems (HUMS). However the IoT has additional aspects that can be related to logistics...
The initial focus for the cyber security community has been to make operating systems and networks more secure and harder to penetrate. These improvements are making it more difficult to exploit these systems, driving attackers to turn their attention to embedded systems and hardware exploitation. It is expected that new threats from improperly secured embedded operating systems, poorly defended firmware...
Santa Barbara Infrared (SBIR) is developing a family of support equipment based on the U.S. Army's Future E-O system, a key component of the Next-Generation Automatic Test Station (NGATS). These electro-optical (E-O) test systems are scalable to meet the varying test and diagnostic needs at factory, depot and field maintenance levels. The family shares an open-system modular architecture that enables...
Rounding errors are introduced pervasively when using floating-point arithmetic to approximate real arithmetic. The accumulation or catastrophic cancellation of rounding errors in numerical programs may produce high inaccuracy results, which can cause serious software failures once being triggered. High inaccuracies are known hard to debug and fix manually for developers. Hence, the automated techniques...
Refactoring is widely used technique to enhance overall quality of an existing software system by changing its internal structure without modifying its external behavior. Although, it is difficult to implement the refactoring manually, it helps to reduce the defects in the existing software. Three main types of design defects are investigated in the current study namely blob, Spaghetti Code (SC) and...
• U.S. nuclear power plant operating philosophy • The E-M Environment • Digital changes and challenges • EMC within the design change process • Testing & review for EMC
Technical Debt (TD) is a metaphor used to explain the negative impacts that sub-optimal design decisions have in the long-term perspective of a software project. Although TD is acknowledged by both researchers and practitioners to have strong negative impact on Software development, its study on Testware has so far been very limited. A gap in knowledge that is important to address due to the growing...
Utilities employ Thermal instability testing (TIT) for final acceptance testing alter the construction and refurbishment of turbogenerator rotors. This type of testing is performed through two methodologies namely current injection and friction/windage in order to assess the thermal sensitivity of the machine's rotor. Although there are distinct differences between the two methods, no apparent preference...
The useful life of an electrical generator is directly related to the condition of the winding insulation. Non-invasive methods to assess the condition of insulation systems are typically limited to physical inspections, drawing inferences from a review of operating conditions and maintenance records, and from the results of on-line and off-line electrical testing. This paper identifies when to perform...
The article deals with the condition estimation of 6-10 kV cable lines (CL) with impregnated paper insulation (IPI) taking into account their length and operational reliability measures according to failure statistics. The subject under study is urgent because of the lack of reasonable insulation diagnostics of CL. The article theoretically justifies the CL diagnostics with non-destructive methods...
This paper presents a mathematical model for assessing the availability of a non-redundant telecommunications system, which is continuously tested during operation. The types of faults that can occur in such systems are defined as permanent and intermittent faults. Mathematical equations are derived to calculate the mean times spent by the system in the operable and repair states using the properties...
Formal approaches to software development have traditionally aimed at guaranteeing software correctness, through the use of notations, analysis mechanisms and other elements founded on solid mathematical grounds. Since the seminal works of Hoare, Floyd and others, formal methods have used logical notations to capture intended software behavior, and proposed techniques for reasoning about software...
Developers write unit tests together with programcode, and then maintain these tests as the program evolves. Sincewriting good tests can be difficult and tedious, unit tests canalso be generated automatically. However, maintaining these tests(e.g., when APIs change, or, when tests represent outdated andchanged behavior), is still a manual task. Because automaticallygenerated tests may have no clear...
We present an original concept for patch generation: we propose to do it directly in production. Our idea is to generate patches on-the-fly based on automated analysis of the failure context. By doing this in production, the repair process has complete access to the system state at the point of failure. We propose to perform live regression testing of the generated patches directly on the production...
Test case maintainability is an important concern, especially in open source and distributed development environments where projects typically have high contributor turn-over with varying backgrounds and experience, and where code ownership changes often. Similar to design patterns, patterns for unit testing promote maintainability quality attributes such as ease of diagnoses, modifiability, and comprehension...
Current automatic program repair techniques often produce overfitting patches. Such a patch passes the test suite but does not actually repair the bug. In this paper, we propose two techniques to address the patch overfitting problem. First, we propose an automatic repair technique that performs syntactic code search to leverage bug-related code from a code database to produce patches that are likely...
In the paper are described general changes and chronology of their implementation related to requirements for electrical insulating footwear and overshoes. They are based on new edition of EN 50321-1, which still is under development within WG5 TC 81 CLC.
Transportation agencies strive to keep people and goods moving. Operation and maintenance of transportation infrastructure is key to accomplish their objectives. Intelligent Transportation Systems (ITS) applications rely on massive detection grids that collectively demand significant maintenance resources. Resource constraints force transportation agencies to look for innovative ways to optimize their...
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