The evolution of a slender non-axisymmetric drop in an extensional flow

An asymptotic method for analysing slender non-axisymmetric drops, bubbles and jets in a general straining flow is developed. The method relies on the slenderness of the geometry to reduce the three-dimensional equations to a sequence of weakly coupled, quasi-two-dimensional Stokes flow problems for the cross-sectional evolution. Exact solution techniques for the flow outside a bubble in two-dimensional Stokes flow are generalised to solve for the transverse flow field, allowing large non-axisymmetric deformations to be described. A generalisation to the case where the interior contains a slightly viscous fluid is also presented. Our method is used to compute steady non-axisymmetric solution branches for inviscid bubbles and slightly viscous drops. We also present unsteady numerical solutions showing how the eccentricity of the cross-section adjusts to a non-axisymmetric external flow. Finally, we use our theory to investigate how the pinch-off of a jet of relatively inviscid fluid is affected by a two-dimensional straining cross-flow

A user oriented computer program for the analysis of microwave mixers, and a study of the effects of the series inductance and diode capacitance on the performance of some simple mixers

A user oriented computer program for analyzing microwave and millimeter wave mixers with a single Schottky barrier diode of known I-V and C-V characteristics is described. The program first performs a nonlinear analysis to determine the diode conductance and capacitance waveforms produced by the local oscillator. A small signal linear analysis is then used to find the conversion loss, port impedances, and input noise temperature of the mixer. Thermal noise from the series resistance of the diode and shot noise from the periodically pumped current in the diode conductance are considered. The effects of the series inductance and diode capacitance on the performance of some simple mixer circuits using a conventional Schottky diode, a Schottky diode in which there is no capacitance variation, and a Mott diode are studied. It is shown that the parametric effects of the voltage dependent capacitance of a conventional Schottky diode may be either detrimental or beneficial depending on the diode and circuit parameters

Guidelines for assessing the sources of risk and vulnerability

Social risk management (SRM) is a new means of looking at poverty, risk, and risk management that was recently presented in the World Bank's Social Protection Strategy Paper. The SRM perspective addresses how vulnerable households can be helped to better manage risks and become less susceptible to potentially damaging welfare losses. This paper provides some basic concepts and guidelines for organizing ideas and information that are relevant to risk and vulnerability assessments. Several templates are provided in the Annex, along with a list of completed and ongoing World Bank reports that investigate risk and vulnerability.Insurance&Risk Mitigation,Health Economics&Finance,Environmental Economics&Policies,Social Risk Management,Banking Law

The Covariant Quantum Superstring and Superparticle from their Classical Actions

We develop an approach based on the Noether method to construct nilpotent BRST charges and BRST-invariant actions. We apply this approach first to the holomorphic part of the flat-space covariant superstring, and we find that the ghosts b, c_z which we introduced by hand in our earlier work, are needed to fix gauge symmetries of the ghost action. Then we apply this technique to the superparticle and determine its cohomology. Finally, we extend our results to the combined left- and right-moving sectors of the superstring.Comment: 14 pages, harmva

Premenstrual Syndrome and Marital Dynamics

The University Archives has determined that this item is of continuing value to OSU's history.Presenter: Judith P. Siegel, Ph.D., Assistant Professor, Jane Addams College of Social Work, University of Illinois, Chicago, Illinois - "Premenstrual Syndrome and Marital Dynamics".The Ohio State University College of Social Wor

Processing techniques development, volume 3. Part 2: Data preprocessing and information extraction techniques

There are no author-identified significant results in this report

How Many Trans People Get Abortions? An Introduction to Critical Data Studies

As abortion restrictions escalate, scholars and activists have struggled to incorporate transgender individuals into their organizing efforts. On one hand, most people recognize that not everyone who needs an abortion identifies as a woman. On the other hand, many are reluctant to abandon or complicate the rallying cry of abortion as a woman\u27s issue. Caught at a perceived crossroad, stakeholders wonder, how many transgender people actually get abortions? in the hopes that this number might guide their social movement strategies. In this assignment, students will use the concept of critical data studies to examine the politics of how we collect and interpret data. Specifically, they will learn about critical data studies from an introductory article in Trans Studies Quarterly, then conduct a case study using two short articles from the journal Contraception that attempt to estimate the number of trans abortion-seekers. This activity engages a number of core topics in feminist theory, including the relationship between knowledge and power, building coalitions across difference, and questions of identity, essentialism, and what constitutes a “woman.