Spatial oscillations in the spontaneous emission rate of an atom inside a metallic wedge

A method of images is applied to study the spontaneous emission of an atom inside a metallic wedge with an opening angle of $\pi/N$, where N is an arbitrary positive integer. We show the method of images gives a rate formula consistent with that from Quantum Electrodynamics. Using the method of images, we show the correspondence between the oscillations in the spontaneous emission rate and the closed-orbits of emitted photon going away and returning to the atom inside the wedge. The closed-orbits can be readily constructed using the method of images and they are also extracted from the spontaneous emission rate.Comment: 8 figure

Multiple Time Scales in Diffraction Measurements of Diffusive Surface Relaxation

We grew SrTiO3 on SrTiO3 (001) by pulsed laser deposition, using x-ray scattering to monitor the growth in real time. The time-resolved small angle scattering exhibits a well-defined length scale associated with the spacing between unit cell high surface features. This length scale imposes a discrete spectrum of Fourier components and rate constants upon the diffusion equation solution, evident in multiple exponential relaxation of the "anti-Bragg" diffracted intensity. An Arrhenius analysis of measured rate constants confirms that they originate from a single activation energy.Comment: 4 pages, 3 figure

Oxetanes from the Ring Contraction of ?-Triflates of ?-Lactones: Oxetane Nucleosides and Oxetane Amino Acids

?-Triflates of ?-lactones with potassium carbonate in methanol give efficient contraction of the ring to oxetane-1-carboxylates in which the oxygen substituent at C(3) of the oxetane is predominantly trans to the carboxylate at C(2), regardless of the stereochemistry of the starting triflate. The limitations of the procedure are discussed and compared with analogous reactions for the preparation of THF carboxylates. The potential of the contraction in the preparation of oxetane nucleosides (such as oxetanocin) and oxetane sugar amino acids (analogues of oxetin) as peptidomimetics with predisposition to form secondary structural motifs is illustrated

Rainbows in the Grass. II. Arbitrary Diagonal Incidence

We consider external reflection rainbow caustic,,; due to the reflection of light from a pendant droplet where the light rays are at an arbitrary angle with respect to the horizontal. We compare this theory to observation of glare spots from, pendant drops on grass; we also consider the potential application of this theory to the determination of liquid surface tension. (C) 2008 Optical Society of Americ

Rainbows in the Grass. I. External Reflection Rainbows from Pendant Droplets

In the mid-morning on a sunny day one can sometimes see glare spots associated with uncolored rainbow (i.e., fold) caustics due to the sunlight reflected from the surface of dew or guttation drops. We show that these dewdrop reflection rainbows are due to places on the droplet (i.e., from an inflection circle ) where its Gaussian curvature becomes zero. We work out the theory of such caustics with horizontally incident light and present a comparison of the theory to measurements made in the laboratory. (C) 2008 Optical Society of Americ

The Original Olivia, No. 1

volumes : illustrations. Publication Date: No.1 (summer 1991)-. Title from indicia. For adults only! Contents: No. 1. The Maltese Pussy -- Brunch of the Amazon cavewomen -- Close encounters of the bimbo kind / Robert Outlaw -- Barnyard bimbo / Robert Outlaw, story & Dan W. Taylor, art. Color cover illustrations, b&w interior. Library has #1 (summer 1991). The Adler Archive of Underground Comix, Gift of Bill Adler.https://digitalcommons.risd.edu/specialcollections_adlerarchive_undergroundcomix/1063/thumbnail.jp

Observed Effects of a Changing Step-Edge Density on Thin-Film Growth Dynamics

We grew SrTiO3 on SrTiO3 [001] by pulsed laser deposition, while observing x-ray diffraction at the (0 0 .5) position. The drop dI in the x-ray intensity following a laser pulse contains information about plume-surface interactions. Kinematic theory predicts dI/I = -4sigma(1-sigma), so that dI/I depends only on the amount of deposited material sigma. In contrast, we observed experimentally that |dI/I| < 4sigma(1-sigma), and that dI/I depends on the phase of x-ray growth oscillations. The combined results suggest a fast smoothing mechanism that depends on surface step-edge density.Comment: 4 figure

The Impact of Situational Factors On Information System (Is) Managerial Leader Behaviors: What Information Systems Employees Want

Information systems leadership has evolved dramatically over the past 40 years. Early in the era of computing most attention was focused on the technical skills of IS managers. As IS has become ubiquitous in our organizations and increasingly embedded in our everyday lives, the need for a broader approach to IS management has emerged with an increasing emphasis on non-technical skills in business practices and an appreciation of the impact of organizational culture. Further, information systems managers increasingly find themselves in crisis situations that may require different leadership skills to successfully navigate. These crises may be caused by the physical destruction of computer hardware, the loss of critically sensitive data, sophisticated hacking of company computers, or a coding error in a mission critical software program. The research on managerial leadership in crisis situations is relatively sparse; however, the research on managerial leadership behaviors for the information systems sector is essentially nonexistent. This research study attempts to fill that gap, finding that there are a few desired managerial leadership behaviors in common between the information systems group and other studied groups, as well as differences and desired shifts in priorities

INTRODUCTION TO SELECTING SUBSETS OF TRAITS FOR QUANTITATIVE TRAIT LOCI ANALYSIS

Quantitative trait loci (QTL) mapping is a popular statistical method that is often used in agricultural applications to identify genomic regions associated with phenotypic traits of interest. In its most common form, a QTL analysis tests one phenotypic trait at a time using a variety of research hypotheses that depend on the application. When multiple traits are available, there are considerable benefits to analyzing subsets of biologically related traits in a multipletrait QTL mapping framework. Determining the most informative subset(s) of traits is the critical challenge that we address in this work. We present our approach, as well as simulations that demonstrate the performance. We also discuss an application of our approach as applied to an Arabidopsis thaliana data set