The delay fault testing has become an important part of the overall test development process. But delay fault testing is not so mature as stuck-at fault testing. The paper surveys various delay fault models, their advantages and limitations. The current trends in test pattern generation for delay faults are analyzed, too. The test pattern generation is directly related to the coverage metrics. ...

Scan technology increases the switching activity well beyond that of the functional operation of an IC. In this paper, we first discuss the issues of excessive peak power during scan testing and highlight the importance of reducing peak power particularly during the test cycle (i.e. between launch and capture) so as to avoid noise phenomena such as IR-drop or Ground Bounce. Next, we propose a s...

the global investigation of disasters in recent years shows that their number has increased annually and the number of affected people and costs of disasters are increasing

Telecommunication networks of the future are believed to involve systems that will work on different technologies, such as WiFi, WiMAX, 2G/3G, LTE, and satellite. In order to efficiently orchestrate the working of the different technologies, the idea of hybrid networks is being seriously considered. The chief driving factor is to facilitate and then exploit the cooperation of different wireless...

Satellite-retrieved aerosol optical depth (AOD) has become an important predictor of ground-level particulate matter (PM) and greatly empowered air pollution research worldwide. We evaluated the AOD parameters included in the Collection 6 aerosol product of the Moderate Resolution Imaging Spectroradiometer (MODIS) for two key factors affecting their applications in air quality research—coverage...

Using a drone as an aerial base station (ABS) to provide coverage to users on the ground is envisaged as a promising solution for beyond fifth generation (beyond-5G) wireless networks. While the literature to date has examined downlink cellular networks with ABSs, we consider an uplink cellular network with an ABS. Specifically, we analyze the use of an underlay ABS to provide coverage for a te...

PALM-3000 is proposed to be the first visible-light sodium laser guide star astronomical adaptive optics system. Deployed as a multi-user shared facility on the 5.1 meter Hale Telescope at Palomar Mountain, this state-of-the-art upgrade to the successful Palomar Adaptive Optics System will have the unique capability to open the visible light spectrum to diffraction-limited scientific access fro...

For the TerraSAR-X mission two new modes have been implemented and are operational since autumn 2013. One is a high azimuth resolution Staring Spotlight mode and the other is a wide ScanSAR mode with doubled ground range coverage compared to the nominal TerraSAR-X ScanSAR. This paper gives an overview about SAR performance analyses conducted during the mode design and implementation phases and ...

Jonathan M. Stern is Chair of the DRI Aerospace Law Committee. He practices aerospace and insurance coverage law with Schnader Harrison Segal & Lewis LLP, where he is resident in the Firm’s Washington, DC, office. Mr. Stern, who holds FAA-issued commercial pilot, control tower operator, and ground instructor certificates, was formerly an air traffic controller at Washington National Airport and...

This paper presents a simple model for the evaluation of obstruction caused by multiple buildings in satellite mobile communication systems, or in high-altitude platform (HAP) coverage. The proposed model can be useful for integration into propagation prediction tools. It is based on the KichhoffHuygens formulation, and includes the effect of ground reflections and reflections on a facing build...