background: hot lab is a specially designed room in a nuclear medicine hospital where the radiopharmaceuticals are delivered, stored and prepared for dispensing. 99mo/99mtc-generator is the major source in the hot lab used for various medical imaging. it is important to maintain a standard for hot lab procedures to optimize the patient care and minimize radiation exposure to all nuclear medicin...

We propose a self-powered remote multi-sensing system for traffic sensing which is powered by the collective energy harvested from mechanical vibration of road caused passing vehicles and temperature gradient between asphalt soil underneath. A stacked piezoelectric transducer converts vibrations into electrical thermoelectric generator harvests thermal gradient. Electrical signals generators ar...

we analyze some properties of the distribution $q_{g,k}$ of the first component in a $k$-tuple chosen uniformly‎ ‎in the set of all the $k$-tuples generating a finite group $g$ (the limiting distribution of the product replacement algorithm)‎. ‎in particular‎, ‎we concentrate our attention on‎ ‎the study of the variation distance $beta_k(g)$ between $q_{g,k}$ and the uniform distribution‎. ‎we ...

virtual synchronous generators (VSGs) powered by renewable energy sources prefer to have storage attached the DC link with DC–DC converters, emulating inertia and smoothing intermittency of generations. This paper proposes a new VSG method for two-stage converter eliminate circulating power among inverters while having external characteristics identical those traditional VSG. In particular, pro...

Quantum-dot Cellular Automata (QCA) is a prominent paradigm that is considered to continue its dominance in thecomputation at deep sub-micron regime in nanotechnology. The QCA realizations of five-input Majority Voter based multilevel parity generator circuits have been introduced in recent years. However, no attention has been paid towards the QCA instantiation of the generic (n-bit) even and ...

The transformation of the electricity sector is a central element transition to decarbonized economy. Conventional generators powered by fossil fuels have be replaced variable renewable energy (VRE) sources in combination with storage and other options for providing temporal flexibility. We discuss market dynamics increasing VRE penetration its integration system. describe merit-order effect (t...

Automated terrain classification for electric powered wheelchairs (EPWs) has two primary motivations. First, certain terrains (e.g., sand and gravel) make wheelchair mobility more difficult. To alleviate this problem the wheelchair control system can be manually tuned for maximum speeds and/or accelerations to help adapt to various terrains. Terrain classification can then be used to automate t...

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...