On the Accuracy of Equivalent Antenna Representations

The accuracy of two equivalent antenna representations, near-field sources and far-field sources, are evaluated for an antenna installed on a simplified platform in a series of case studies using different configurations of equivalent antenna representations. The accuracy is evaluated in terms of installed far-fields and surface currents on the platform. The results show large variations between configurations. The root-mean-square installed far-field error is 4.4% for the most accurate equivalent representation. When using far-field sources, the design parameters have a large influence of the achieved accuracy. There is also a varying accuracy depending on the type of numerical method used. Based on the results, some recommendations on the choice of sub-domain for the equivalent antenna representation are given. In industrial antenna applications, the accuracy in determining e.g. installed far-fields and antenna isolation on large platforms are critical. Equivalent representations can reduce the fine-detail complexity of antennas and thus give an efficient numerical descriptions to be used in large-scale simulations. The results in this paper can be used as a guideline by antenna designers or system engineers when using equivalent sources

Cultivating Perspective: A Qualitative Inquiry Examining School History Textbooks for Microaggressions Against Native Americans

Native American youth face a number of challenges that affect their academic success and mental health (Center for Native American Youth, 2016). One way in which Native American youth currently face prejudice within the school system is through curriculum (Yosso, 2002). More specifically, Native American youth are often presented with textbooks that include stereotyped and distorted information about their peoples’ history (Loewen, 1995; Sanchez, 2007). However, there is currently a gap in the literature showing whether or not these textbooks also contain microaggressive statements towards Native Americans. The current study looked at 5 Eighth Grade level Montana history texts from around the state to explore two research questions. The first- are there microaggressions in history textbooks used across the state, and the second- if there are microaggressions, what are those themes? Results of this study found that microaggressions were present in textbooks used in Eighth Grade textbooks in Montana. Microaggressions found in these books included 96 microinvalidations, 54 microinsults, and 11 microassaults. Furthermore, the themes of these microaggressive statements expanded beyond Sanchez’s (2007) original themes. In turn, this section further discusses the results of this study as well as the possible implications, directions for future research, and suggestions for school psychologists

POLLUTION SURVEILLANCE AND DATA ACQUISITION USING MULTISPECTRAL REMOTE SENSING 1

Large scale water resource investigations and effective pollution surveillance programs require the development of additional instrumentation and techniques to supplement existing methods of data acquisition. As a result, interest is growing in the concept of remote sensing. Described in this paper is the multispectral sensor concept and its application in water resource studies.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73841/1/j.1752-1688.1970.tb01651.x.pd

Welfare Workers' Responses to Domestic Violence Cases: The Effects of Training and Worker Characteristics

Copyright 2006 Alliance for Children and FamiliesThis study evaluated a one-day domestic violence training for Temporary Assistance for Needy Families (TANF) workers and analyzed the relationship between worker characteristics and the use of work exemptions. In a post-only evaluation, trained workers reported a greater tendency than untrained workers to refer clients to couples counseling, make a safety plan, and file a report to child protection services. In a pre/post evaluation, workers reported after training that they would be less likely to refer clients to couples counseling, and more likely to ask about the emotional and physical impact of abuse, make a safety plan, and ask about access to weapons. Workers most likely to offer a waiver from work requirements reported a higher likelihood of making referrals for a variety o f services

Masculinidades, Igualdad de Género y Violencia

Based on new data on the impact of gender equality on interpersonal violence, the paper offers a critique of the gender-based violence view and presents an alternative view where gender inequality is central. This is connected to recent theory developments regarding gendering as an ontoformative (reality shaping) process, focusing on how gender inequality becomes manifest especially through sexual harassment and sex-related violence.Este artículo está basado en nuevos datos sobre el impacto de la igualdad de género en la violencia interpersonal, en él se presenta una crítica a la visión existente acerca de la violencia de género y describe una visión alternativa donde la desigualdad de género es central. Ello está conectado con los desarrollos teóricos recientes sobre género entendidos como un proceso ontoformativo (visión de la realidad), centrados en cómo la desigualdad de género se manifiesta especialmente a través del acoso sexual y la violencia sexual

Technology, Safety and Costs of Decommissioning a Reference Low-Level Waste Burial Ground. Main Report

Safety and cost information are developed for the conceptual decommissioning of commercial low-level waste (LLW) burial grounds. Two generic burial grounds, one located on an arid western site and the other located on a humid eastern site, are used as reference facilities for the study. The two burial grounds are assumed to have the same site capacity for waste, the same radioactive waste inventory, and similar trench characteristics and operating procedures. The climate, geology. and hydrology of the two sites are chosen to be typical of real western and eastern sites. Volume 1 (Main Report) contains background information and study results in summary form

Macro material flow modeling for analyzing solid waste management options

A Macro Material Flow Modeling (MMFM) concept and approach are being adopted to develop a predictive modeling capability. This capability is intended to provide part of the basis for evaluating potential impacts from various solid waste management system configurations and operating scenarios, as well as evaluating the impacts of various policies on solid waste quantities and compositions. The MMFM capability, as part of a broader Solid Waste Initiative at Pacific Northwest Laboratory, is intended to provide an increased understanding of solid waste as a disposal, energy, and resource problem on a national and global scale, particularly over the long term. This model is a macro-level simulation of the flows of the various materials through the solid waste management system, and also through the associated materials production and use system. Inclusion of materials production and use within the modeling context allows a systems approach to be used, providing a much more complete understanding of the origins of the solid waste materials and also of possible options for materials recovery and reuse than if a more traditional end-of-pipe'' view of solid waste is adopted. The MMFM is expected to be useful in evaluating longer-term, broader-ranging solid waste impacts than are traditionally evaluated by decision-makers involved in implementing solutions to local or regional solid waste management problems. This paper discusses the types of questions of interest in evaluating long-term, broad-range impacts from solid waste. It then identifies the basic needs for predictive modeling capabilities like the MMFM, and provides a basic description of the conceptual framework for the model and the associated data. Status of the MMFM implementation is also discussed

Subacromial ultrasound guided or systemic steroid injection for rotator cuff disease: randomised double blind study

Objective To compare the effectiveness of ultrasound guided corticosteroid injection in the subacromial bursa with systemic corticosteroid injection in patients with rotator cuff disease

The Iterative Signature Algorithm for the analysis of large scale gene expression data

We present a new approach for the analysis of genome-wide expression data. Our method is designed to overcome the limitations of traditional techniques, when applied to large-scale data. Rather than alloting each gene to a single cluster, we assign both genes and conditions to context-dependent and potentially overlapping transcription modules. We provide a rigorous definition of a transcription module as the object to be retrieved from the expression data. An efficient algorithm, that searches for the modules encoded in the data by iteratively refining sets of genes and conditions until they match this definition, is established. Each iteration involves a linear map, induced by the normalized expression matrix, followed by the application of a threshold function. We argue that our method is in fact a generalization of Singular Value Decomposition, which corresponds to the special case where no threshold is applied. We show analytically that for noisy expression data our approach leads to better classification due to the implementation of the threshold. This result is confirmed by numerical analyses based on in-silico expression data. We discuss briefly results obtained by applying our algorithm to expression data from the yeast S. cerevisiae.Comment: Latex, 36 pages, 8 figure