Differential carrier lifetime measurements were performed on index-guided oxide-confined vertical cavity surface emitting lasers operating at 980 nm. Lifetimes were extracted from laser impedance measurements at subthreshold currents, with device size as a parameter, using a simple small-signal model. The carrier lifetimes ranged from 21 ns at 9 mA, to about 1 ns at a bias close to threshold. F...

In this paper I attempt to address a serious criticism of the “Anthropic Landscape” and “Discretuum” approach to cosmology, leveled by Banks, Dine and Gorbatov. I argue that in this new and unfamiliar setting, the gauge Hierarchy may not favor low energy supersymmetry. 1 The Banks Dine Gorbatov Argument Let’s begin by reviewing a successful use of the anthropic principle. In 1987 Steven Weinber...

The formal description of the semantics of object-oriented data models is still an open problem. Some characteristic features of object-oriented data models, such as methods and inheritance, involve investigating data and schema. Therefore they can not be handled straightforwardly with rst order logic. As an alternative, we propose the evolving algebra approach to specify the formal semantics o...

Achieving dependability in large scale infrastructure systems always requires making intelligent tradeoffs. This paper proposes QAPSL, a systematic approach to making such tradeoffs with regards to application state management. We identify Quality, Availability, Performance, Security, and Lifetime as a set of fundamental state properties that can be traded against each other. We then describe a...

BACKGROUND Online risk calculators offer different levels of precision in their risk estimates. People interpret numbers in varying ways depending on how they are presented, and we do not know how the number of decimal places displayed might influence perceptions of risk estimates. OBJECTIVE The objective of our study was to determine whether precision (ie, number of decimals) in risk estimat...

HORB is a Java ORB (Object Request Broker) that extends Java for distributed object oriented computing. Applications of HORB and HORB itself are network portable and transferable, since HORB provides both portability and interoperability among diierent kinds of OSs. This paper describes the organization and the main features of HORB. It provides remote object creation/connection, remote method ...

The incidence and mortality from coronary heart disease (CHD) in Japan are reported to be among the lowest of all industrialized countries,1,2 but, in the backdrop of major dietary changes and worsening cardiovascular risk factors,2 recent reports have shown an increasing trend of acute myocardial infarction (AMI) in the Japanese population.3,4 With the aging of the population and the presence ...

New radiative-lifetime measurements based on time-resolved laser-induced fluorescence are reported for 133 odd-parity and 2 even-parity levels of Co I, ranging in energy from 28 300 to 59 400 cm–1. Our lifetimes agree with earlier, but much less extensive, lifetime measurements based on laser-induced fluorescence. Satisfactory agreement is also found with the critical compilation of atomic tran...

— Conventional Augmented Reality has used data gloves or markers for smooth interaction between objects and background. This causes inconvenience of use and lower immersion. To build up immersion in Augmented Reality, additional input devices must be removed. For this purpose, accurate recognition of space coordinates is needed even with no attachment of markers. This paper proposes a method to...

Fluorescence based methods are increasingly being used for the analysis of crude oils because they offer high speed, low cost, non-contact, and non-destructive testing options. The fluorescence of crude oils is due to the presence of a wide range of cyclic aromatic compounds, with the intensity and temporal behaviour of this fluorescence being directly related to chemical composition. In partic...