Recently, push-based delivery has attracted considerable attention as a means of disseminating information to large client populations in both wired and wireless environments. In this paper, we address the problem of ensuring the consistency and currency of client's read-only transactions in the case of updates. Our approach is based on broadcasting invalidation reports and is scalable, i.e., i...

Passive systems possess the beneficial properties of ease of human control, and stable interaction with arbitrary passive systems. Motivated by these properties, our research has been directed towards developing passive hydraulic systems. A novel hydraulic element called the passive valve was first developed. The passive valve was used in single degree of freedom passive bilateral teleoperation...

by Nicholas E. Kottenstette This dissertation shows how to develop wireless networked embedded control systems (wnecs) in which the controller and the plant are isolated and can only interact over a wireless network. Many of the new results presented are based on passivity and scattering theory. In particular we show how to: 1. synthesize discrete time passive, strictly-input passive, and stric...

Euthanasia is one of the controversial topics in current medical ethics. Among the six well-known types of euthanasia, passive voluntary euthanasia (PVE) seems to be more plausible in comparison with other types, from the moral point of view. According to the Kantian framework, ethical features come from 'reason'. Maxims are formulated as categorical imperative which has three different version...

This paper explores passive switched capacitor based RF receiver front ends for spectrum sensing. Wideband spectrum sensors remain the most challenging block in the software defined radio hardware design.The use of passive switched capacitors provides a very low power signal conditioning front end that enables parallel digitization and software control and cognitive capabilities in the digital ...

In response to concern about smallpox possibly being used as a biological weapon, the President of the United States launched the National Smallpox Pre-Event Vaccination Program on 13 December 2002. Given safety concerns, identifying potentially serious adverse events (SAEs) was an essential tool of the program. To monitor for SAEs, both enhanced passive surveillance and active surveillance sys...

dynamically stable biped robots mimicking human locomotion have received significant attention over the last few decades. formerly, the existence of stable periodic gaits for straight walking of passive biped walkers was well known and investigated as the notion of passive dynamic walking. this study is aimed to elaborate this notion in the case of three dimensional (3d) walking and extend it f...

A new method for integrated design of passive and active elements is presented. Rather than the existing qualitative selection of parameters for passive elements, a quantitative approach is proposed which finds optimal active and passive parameters with respect to an H2/H∞ performance requirement. This new approach automatically yields passive designs when the given performance limits are high ...

Passive and proactive coping styles are associated with marked differences in behavioral and neuroendocrine responses. Previous studies revealed that the passive individuals are more prone to hyperinsulinemia. Likewise, we hypothesize that different coping styles may require different drugs to treat this. We tested this by treating passive and proactive rats (Roman Low Avoidance and Roman High ...

A quasi-passive leg exoskeleton is presented for load-carrying augmentation during walking. The exoskeleton has no actuators, only ankle and hip springs and a knee variabledamper. Without a payload, the exoskeleton weighs 11.7 kg and requires only 2 Watts of electrical power during loaded walking. For a 36 kg payload, we demonstrate that the quasi-passive exoskeleton transfers on average 80% of...