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Maintenance for a fleet of aircraft can be viewed from a systems engineering perspective. Not only are the aircraft complex systems, the logistics of maintaining airworthy systems depend on resources such as technicians, parts, and support equipment. Support equipment which falls under the Test, Measurement, and Diagnostic Equipment (TMDE) category requires periodic calibration. The calibration process...
In standard power cycling tests, forward conduction generates heat in the die and therefore the ther-momechanical stress in the package. In application, however, a significant part of the power losses are switching losses, so that the load current is lower than in standard power cycling test, for an equal temperature swing. A new concept for power cycling tests is presented, which allows the generation...
Bonding technology using anisotropic conductive paste shows great promise to achieve the denser integration schemes that are required for the application of high resolution ultrasonic imaging. A design of experiments has been carried out to characterize and optimize a flip-chip bonding technology that utilizes a novel, magnetically aligned anisotropic conductive paste. This optimized process has the...
The step in cost savings separating low (LV) and medium voltage (MV) drive application has steadily decreased over the last two decades. In addition to the more economical use of MV drives in certain applications, there are compelling technical advantages, and increased reliability is also often realized. This can equate to a decreased total cost of ownership and should be explored when applying drives...
0.35mm fine pitch wafer level chip scale package (WLCSP) has been developed by NCAP for portable electronic applications. It can provide 196 pin counts in 5mm × 5mm package body size. This paper reports the development work of WLCSP and the package level and board level reliability study including thermal cycling and drop test. The technology is evaluated using a 5mm × 5mm test vehicle with 0.35mm...
With the development of the automotive electronics and other fields of electronic products toward the direction of miniaturization, high density, high reliability and low power consumption, the three-dimensional system-level packaging technology has become a new direction of technology development. In the three-dimensional system-level package, due to the need to stack a variety of chips, and the...
The smart electricity meter (SEM) is important in our life, so consumers and manufacturers pay more attention to its reliability. In order to evaluate the performance of SEM, we must spend a lot of time censoring its status. For example, if we want to assess to the SEM reliability, it may take several years at least according to the standards. So accelerated degradation testing (ADT) and accelerated...
Multiple indices are available for measuring the performance of closed-loop systems, some of which are explored in the seminal work of Graham & Lathrop in 1953. In their paper, a determination is made of closed-loop transfer functions for optimal performance relative to the non-standard performance indices ITSE and ISTSE. A new approach is presented to calculate such metrics using Lyapunov matrix...
This paper presents a smart system based on Low Power Wide Area networks for a remote monitoring of technological room in unstaffed railway stations. The paper aim is the design of an efficient network scheme characterized by improved performance compared with the standard solution. Adopting an innovative smart System Control Strategy and a custom network topology, good results are reached in terms...
A wide range of mobile devices, e.g., wireless sensor nodes, RFID tags and smartphones, gradually coalesces into the Internet of Things (IoT). Debugging and optimizing such systems is challenging and necessary to realize the foreseen vision. In this paper, we describe our endeavor to build and adapt a testbed enabling the analysis of different scenarios involving mobile elements. Instead of creating...
Short-term tracking is an open and challenging problem for which discriminative correlation filters (DCF) have shown excellent performance. We introduce the channel and spatial reliability concepts to DCF tracking and provide a novel learning algorithm for its efficient and seamless integration in the filter update and the tracking process. The spatial reliability map adjusts the filter support to...
A cost-efficient framework for executing life-time dependability procedures is presented in this paper. The proposed framework relies on distributed sensors and actuators (embedded instruments) for self-awareness and adaptation, where the IEEE 1687 standard (iJTAG) is utilized for the dependability communications and the on-chip access of the instruments.
In the presented work we predict the life expectancy of multi-part railway fail-safe signaling systems. The monitored electronic track circuits detect train locations and movement in real time, and issue alerts and warnings to prevent collisions. Based on 10 years of failure reports from the manufacturer of systems used by Railway Infrastructure Administration in the Czech Republic, we establish estimates...
We present a novel on-board perception system for collision avoidance by micro air vehicles (MAV). An egocentric cylindrical representation is utilized to model the world using forward-looking stereo vision. This efficient representation enables a 360° field of regard, as the vehicle moves around and disparity maps are fused temporally on the cylindrical map. For this purpose, we developed a new Gaussian...
The study herein summarized was focused on the development of a method to derive reliable estimates of the quality of movement of stroke survivors via the analysis of wearable sensor data. Data was collected from 34 subjects while they performed a battery of functional movements that are part of a standard clinical assessment. The quality of movement was assessed using the Functional Ability Scale,...
Field Programmable Gate Array (FPGA) system is widely used in deep learning application and cloud system for acceleration. Quality and reliability of IP block is essential to the successful development of today's complex hardware acceleration design. In this paper, we discuss the important issues of quality and reliability of digital soft IP, and propose a qualification measurement system that can...
In service oriented architecture, workflow discovery and web service composition (WSC) are two major challenges and many works have been carried out in the recent years. In this work, we address the problem of WSC in a multi-cloud environment. All existing methods assume that a feasible solution exists and solves the WSC problem, however when user constraints are hard, a feasible solution might not...
The vehicle routing problem (VRP) is one of the central problems in logistics and supply chain management. In this paper, we present a simulation approach for cost and reliability analyses for the vehicle routing problem with stochastic demands. The objective of this study is to provide a method in evaluating the reliability and the associated cost of a VRP solution by using simulation. First, a deterministic...
In medical practice, glaucoma severity is usually measured using the Advanced Glaucoma Intervention Studies (AGIS) metric. In a previous study [2], we replicated the work of Montolio et al., [5] and demonstrated that, for a larger dataset, time of day of test using the AGIS metric did make a difference to the measurement of glaucoma, supporting Montolio et als work. However, in our earlier study,...
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