Preamplified photodetectors for high-fidelity postselecting optical devices

The fidelity of postselecting devices based on direct photon number detection can be significantly improved by insertion of a phase-insensitive optical amplifier in front of the detector. The scheme is simple, and the cost to the probability of obtaining the appropriate detector outcome is low.Comment: 5 pages, 7 figures, typos corrected and Journal Ref Adde

Strong causality from weak via continuous monitoring

Repeated unbiased measurements cause a continual application of the weak causality principle, leading to an apparent arrow of time for continuously-monitored quantum systems

Retrodictive fidelities for pure state postselectors

Two measures of fidelity are proposed for postselecting devices, the retrodictive conditional probability that the state in the measurement arm is the one indicated by the detectors, and the probability that the device produces the state that it would produce if working perfectly. The first is the natural quantity that one wishes to maximize to improve the device operation. The second corresponds more closely with the accurate operation of the device than the more usual overlap-based fidelity. The results are particularly applicable to the types of state preparation and logic gate operation in linear optical quantum computing

An examination of gender differences in attitudes towards partner infidelity

The present study is designed to take a new approach to studying gender differences in reactions to partner infidelity by measuring attitudes toward partner infidelity. No previous studies have directly examined attitudes toward partner sexual versus emotional infidelity, nor have studies assessed the strength of these attitudes. Thus, this study was designed as an initial investigation of overall evaluative differences between men and women. It was found that women held significantly more negative attitudes towards emotional infidelity than did men, with no gender differences in attitude held towards sexual infidelity. For sexual infidelity, more positive attitudes toward partner sexual infidelity were associated with lower reported distress for both men and women, with the relationship being significantly more pronounced for men. For emotional infidelity, attitude strength moderated the relationship between attitude towards emotional infidelity and distress about emotional infidelity. There was a significant relationship between attitudes toward partner emotional infidelity and distress when attitude strength was high but not when attitude strength was low.Department of Psychological ScienceThesis (M.A.

Mentor Teachers Speak: Valuing Teacher Voices in English Education

This narrative inquiry case study brings the voices of mentor teachers into the discourse of English language arts teacher preparation. In a series of interviews, mentor teachers discuss the challenges faced by student teachers, the pedagogical content knowledge needed to teach secondary ELA, and the relationship between secondary schools and universities. At the heart of this project is a desire to empower mentor teachers, whose voices are often missing from scholarship about teacher preparation. This study can give English educators and mentor teachers common ground, fostering connections between the colleges who prepare new teachers and the schools in which they will teach

Extension of tabulated design parameters for rectangular columns exposed to fire taking into account second order effects and various fire models

Fire, as one of the most severe load conditions, has an important impact on concrete structures. It does not only affect the material strength, but also the structural stiffness and stability. A concrete column, compared to other structural members, has most often to cope both with vertical forces and bending moments transmitted by slabs and beams. Consequently, it is essential to find a reliable and practical way to establish interaction curves for the overall structural behaviour of concrete columns subjected to fire. In this paper, a cross-section calculation method based on the material models of Eurocode 2 is explained and adopted to calculate interaction curves for a typical rectangular column exposed to the ISO834 standard fire. Subsequently, an iterative approach is introduced to develop interaction curves taking into account second order effects in case of four-side heated fire exposure. The maximum permitted slenderness ratios of columns under different fire durations are obtained and compared with Eurocode 2 provisions. Finally, this method is applied to calculate the maximum permitted slenderness ratios for columns exposed to hydrocarbon fires and natural fires