This work reports experimental data comparing the low frequency noise spectrum of InP based HBTs. Double heterojunction device structures are examined with and without surface passivation ledges. INTRODUCTION Compound semiconductor InP heterojunction bipolar transistors (HBTs) hold great promise for ultra high-speed analog microwave circuit applications. The low frequency noise characteristics ...

Producing cost-competitive small and medium-sized solar cooling systems is currently a significant challenge. Due to system complexity, extensive engineering, design and equipment costs; the installation costs of solar thermal cooling systems are prohibitively high. In efforts to overcome these limitations, a novel sorption heat pump module has been developed and directly integrated into a sola...

PURPOSE To determine whether giant vacuoles form preferentially near collector channels or over regions of optically empty space within the juxtacanalicular tissue (JCT). METHODS To assess the relationship between giant vacuoles and collector channels, six eyes were perfused with phosphate-buffered saline (PBS) at 20 mm Hg and then fixed by perfusion. Serial sections were cut in the frontal p...

Inspired by work in semi-conservative collection, we have implemented a mostly-copying collector for an object-oriented language, including support for object pinning. Our collector efficiently manages fragmentation by measuring page residency and determining where copying can be most effective. This work in progress will form the foundation of our ongoing work in real-time collection.

This paper presents several microwave power ampl~ier designs that promise high power and broad bandwidth, while meeting the eficiency and linearity requirements of advanced radar and communication systems. Power amplifiers are designed based on an ultra-high f~u~ (>450 GHz) selective buried sub-collector (SBSC) HBT technology [1]. SBSC HBTs are fabricated on prepatterned sub-collector mesas. Th...

Abstract—Solar water heating is a thermodynamic process of heating water using sunlight with the help of solar water heater. Thus, solar water heater is a device used to harness solar energy. In this paper, a modified solar water heating system (MSWHS) has been proposed over flat plate collector (FPC) and Evacuated tube collector (ETC). The modifications include selection of materials other tha...

Real-time Java is becoming a viable platform for real-time applications, bringing new challenges to a garbage collector. A real-time collector has to be incremental as not to cause deadline misses by suspending an application for too long. In particular, if a real-time collector has to relocate objects in the heap, it must do so incrementally and transparently to the application. This is usuall...

This paper presents BBox, a digital black box to provide for authentic archiving (and, consequently, forensic evidence) for remote auditing in distributed systems. Based upon public key cryptography and trusted computing platforms, the BBox employs standard primitives to ensure the authenticity of records during the transmission from devices to the collector, as well as during their storage on ...

This paper presents the design of a prototypical system to support creative group discussions, like brainstorms. The central concept of this design is the Idea-collector: a tangible input device that is used to organize information displayed on an electronic whiteboard. A working prototype of the Idea-collector was made, following a range of early prototypes. Initial user tests are encouraging ...