3-Dimensional simulation of multistage depressed collectors on microcomputers.

A three-dimensional (3-D) package for simulation of asymmetric and crossed-field multistage depressed collectors for microwave tubes has been developed. This package is based upon the 3-D finite-difference code KOBRA3-INP. The main features of the package are a user-friendly input interface, postprocessors for collector analysis and calculation of secondary electron trajectories, and versatile output graphics. Both PC and. mainframe versions of the package have been developed. The results of simple benchmark tests and those of simulation and analysis of asymmetric and crossed-field collectors including the effects of secondary electrons are presented. It is found that the asymmetric hyperbolic electric field collector shows very low backstreaming. It is shown that the representation of trajectories in energy space gives a better insight into the behavior of individual trajectories than plotting in coordinate-space. The package will be useful for designing novel types of depressed collector

Explicit computations of Hida families via overconvergent modular symbols

In [Pollack-Stevens 2011], efficient algorithms are given to compute with overconvergent modular symbols. These algorithms then allow for the fast computation of $p$-adic $L$-functions and have further been applied to compute rational points on elliptic curves (e.g. [Darmon-Pollack 2006, Trifkovi\'c 2006]). In this paper, we generalize these algorithms to the case of families of overconvergent modular symbols. As a consequence, we can compute $p$-adic families of Hecke-eigenvalues, two-variable $p$-adic $L$-functions, $L$-invariants, as well as the shape and structure of ordinary Hida-Hecke algebras.Comment: 51 pages. To appear in Research in Number Theory. This version has added some comments and clarifications, a new example, and further explanations of the previous example

Domestic violence and empowerment : a national study of scheduled caste women in India

Indiana University-Purdue University Indianapolis (IUPUI)Domestic violence (DV) in India is one of the most alarming issues that is experienced by over one-third (36.6%) of non-Scheduled Caste/Scheduled Tribe (non SC/ST) women and nearly half (48%) of Scheduled Caste (SC) women (ages 15-49). DV and women’s empowerment are historically interlinked. The patriarchy embedded within social-cultural norms along with economic capability deprivation takes away the freedom of SC women to enjoy bodily safety in public and private spaces. Despite Constitutional measures, SC women continue to face violence-induced capability deprivation due to discrimination at three levels: caste, class, and gender. DV against SC women is an understudied area; there are scarcely any studies on DV in this population using national data. This research used data from the National Family Health Survey-III 2005-2006 (N = 12,069-SC women and N = 45,390- non-SC/ST women). Descriptive statistics and logistic regression were used to examine DV trends amongst SC and non-SC/ST women. Contrary to the study’s hypothesis, having better empowerment (household-autonomy, healthcare decision-making, sexual-autonomy) increased the likelihood of women experiencing DV. However, the hypothesis relating to economic empowerment and autonomy was supported showing a reduced likelihood of DV. SC women were empowered when they had the capability to earn wages; however, they had no instrumental freedom to spend their own earnings. Similarly, empowerment indicators were shown to impact the likelihood of justifying the violence shaping women’s gender norms and attitudes. When compared with non-SC/ST, SC women who have economic and healthcare autonomy had lower odds of justifying DV. Exposure to DV in childhood, early marriage, and husbands’ alcohol abuse significantly enhanced the likelihood of DV. Across most of the indicators, the intensity of DV amongst SC women was relatively higher than non-SC/ST women. The findings emphasize the need for social work practice and policy to focus not only on empowering women in terms on economic and material well-being through ownership, but also assessing if this ownership have instrumental value in practice without the threat of DV. Future research can enhance understanding of DV by examining social exclusion, socio-cultural patriarchy, and the intersectionality of caste, class, gender, and other individualist and community factors.2 year

Fault tolerant BeeHive routing in mobile ad-hoc multi-radio network

In this paper, fault tolerance in a multi-radio network is discussed. Fault tolerance is achieved using the BeeHive routing algorithm. The paper discusses faults added to the system as random fluctuations in hardware radio operation. The multi-radio nodes are designed using WiMAX and WiFi Radios that work in conjunction using traffic splitting to transfer data across a multi-hop network. During the operation of this network random faults are introduced by turning off certain radios in nodes. The paper discusses fault tolerance as applied to multi radio nodes that use traffic splitting in the transmission of data. We also propose a method to handle random faults in hardware radios by using traffic splitting and combining it with the BeeHive routing algorithm