The history of wilderness in Nevada and the United States

The following thesis addresses the role that interest groups play in the formation of policy within the government of the United States. Furthermore, it concerns itself with one specific policy issue as a means of accomplishing that goal; wilderness policy. Clearly, it can be established that interest groups are an integral part of the public policy process in democratic models of government. By charting the course of a policy issue, such as wilderness, from its inception through the various stages to final resolution, it is possible to see how a federal policy is influenced by interest groups. As this policy affects states and their constituencies, it can be argued that interest groups insert themselves at every step of the policy process under the federalism model of government, and the resulting policy is one that sets the standards for future generations

Incivility as a Barrier to Embeddedness Among Engineering Students: Does Gender Matter?

To meet the current demand for engineers, research has focused on how to attract and retain qualified candidates in the field, especially those that are underrepresented (e.g., women; NSB, 2016). The present study investigates incivility and embeddedness, which have been found to be antecedents of retention in both the workplace (Cortina, Magley, Williams, & Langhout, 2001; Mitchell, Holtom, Lee, Sablynski, & Erez, 2001) and the collegiate setting (Caza & Cortina, 2007; Major et al., 2015). To extend previous research, both constructs were examined simultaneously among undergraduate engineering students. Undergraduate, first-year engineers completed an online survey indicating the extent to which they experienced incivility in engineering, the primary source of the uncivil treatment, and their level of embeddedness in engineering. A comparison of means and three hierarchical moderated regressions were used to test the proposed hypotheses. Results indicated that men and women experienced similar levels of incivility in engineering. In addition, incivility significantly predicted two of the three dimensions of embeddedness: fit and links. Gender moderated the relationship between incivility and engineering fit such that men who experienced incivility experienced lower engineering fit while incivility did not influence engineering fit for women. Gender did not moderate the relationship between incivility and engineering links or sacrifice. Future research should examine persistence in relation to these variables to determine if embeddedness mediates the relationship between incivility and persistence in one\u27s engineering major

Changes in aliphatic hydrocarbon tracer composition during the digestive process of the marine worm Nereis virens. Preliminary results

In the laboratory, marine worms were fed with a mixture of algae and several aliphatic hydrocarbons for 15 days. By comparing hydrocarbons in food and in faeces, it appeared that the worm's digestive process led to changes in the distribution of the n-alkanes mixture. These changes were different from those only due to physical processes in the experimental conditions, indicating that marine worm feeding could substantially affect the fate of hydrocarbons in the sedimentary marine ecosystem

Ferritic nitrocarburising of tool steels

Four different tool steel materials, P20, H13, M2 and D2, were nitrocarburised at 570&deg;C in a fluidised bed furnace. The reactive diffusion of nitrogen and carbon into the various substrate microstructures is compared and related to the different alloy carbide distributions. The effect of carbon bearing gas (carbon dioxide, natural gas) on carbon absorption is reported, as well as its influence on compound layer growth and porosity. Partial reduction of Fe3O4 at the surface resulted in the formation of a complex, epsi-nitride containing oxide layer. In H13, carbon was deeply absorbed throughout the entire diffusion zone, affecting the growth of grain boundary cementite, nitrogen diffusivity and the sharpness of the compound layer: diffusion zone interface. When natural gas was used, carbon became highly concentrated in the compound layer, while surface decarburisation occurred with carbon dioxide. These microstructural effects are discussed in relation to hardness profiles, and compound layer hardness and ductility. The surfaces were characterised using glow discharge optical emission spectroscopy, optical and scanning electron microscopy and X-ray diffraction.<br /

Effect of Seasonal Changes on Predictive Model Assessments of Streams Water Quality with Macroinvertebrates

In this study we investigate how seasonal variability in aquatic macroinvertebrate communities affects the performance of a predictive model developed to assess environmental quality. Macroinvertebrates were sampled from nine not visibly disturbed sites located in different streams of the Mondego catchment across a full year. Organisms were identified to the lowest practicable taxonomic level and their abundances recorded at three taxonomic levels (order, family and lowest level). The seasonal samples were examined with regard to seasonal variation using three predictive models at order, family and lowest taxonomic level. The models showed increasing effect of seasonal changes across taxonomic levels, from order to the lowest level. When using the current models samples should be taken in the same season as the reference sites were sampled. Furthermore, data from more reference sites should be added to the model in order to encompass sufficient natural variation and allow the use of the model in different seasons. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

A field and laboratory evaluation of a commercial ELISA for the detection of Giardia coproantigens in humans and dogs

A capture enzyme linked immunosorbent assay (ELISA®) was evaluated for its ability to detect Giardia coproantigens in the faeces of humans and dogs in the Perth metropolitan area and Aboriginal communities in Fitzroy Crossing, Western Australia. Using zinc sulphate flotation and light microscopy, Giardia cysts and/or trophozoites were observed in 8 of 57 (14%) human stool samples from Perth and 21 of 55 (38%) stool samples from Fitzroy Crossing, after 2 separate examinations. Analysis of diagnostic sensitivity using the ELISA revealed that coproantigens were detected in all 29 human samples (100%) in which Giardia cysts and/or trophozoites were also present. Coproantigens were detected in one further sample from Perth and in 3 samples from Fitzroy Crossing in which no Giardia cyst or trophozoite was observed. The specificity of the test, as defined using Fitzroy Crossing samples free from Giardia, was 91%. The assay did not crossr-eact with Giardia-free stool samples containing Hymenolepis nana, Entamoeba coli, E. hartmanni, Chilomastix mesnili or Ancylostoma duodenale. Giardia cysts and/or trophozoites were also observed in 11 of 32 dog faecal samples (34%) in Perth and 11 of 29 dog samples (38%) in Fitzroy Crossing, after one zinc sulphate examination. The sensitivity of the ELISA for dogs was 64% and 55% for Perth and Fitzroy Crossing specimens respectively. The specificity was 95% when Fitzroy Crossing samples were used. Other parasites observed in Giardia-free faecal samples from dogs which did not produce a positive reaction with the kit were Ancylostoma caninum, Sarcocystis sp. and Isospora sp. The assay was tested under field conditions, in Fitzroy Crossing, where the results were read visually and were shown to correlate well with results obtained using spectrophotometry. Giardia coproantigens present in human stools remained detectable by the ELISA even after storage untreated at 25 °C for 8

Pin on disc wear investigation of nitrocarburised H13 tool steel

Nitrocarburised H13 disks were tested in dry, sliding wear against a stationary ruby ball (pin). Three different 4 h nitrocarburising treatments were compared, using N2/NH3/CO2, N2/NH3/natural gas and N2/NH3 gas mixtures, resulting in compound layers of varying thickness, hardness, porosity and oxide morphology. During mild, oxidative wear, with the formation of abrasive wear debris, the most brittle and oxidised surfaces performed poorly. Polishing to a bright, reflective finish greatly reduced wear. However, the N2/NH3/CO2 sample also frequently maintained a \u27very mild\u27 wear regime, owing to the formation of a protective film between the wear surfaces, and resulting in a lowering of the friction coefficient. This treated surface was porous and covered in a complex layer of coarse oxide+epsi-carbonitride. Nitrocarburised samples and wear tracks were characterised by optical microscopy, SEM, atomic force microscopy and stylus profilometry.<br /

Разработка казуального игрового приложения для развития аналитического мышления

В настоящее время рынок мобильных игр активно развивается. На мобильные игры приходится 33% всех загрузок приложений. Игры — это непрерывный процесс обучения пользователей. Люди не перестают обучаться через какое-то время, они постоянно развиваются и движутся вперёд. Объектом исследования являются платформа Unity, в которой разработано игровое приложение, среда разработки Microsoft Visual Studio, для написания скриптов на языке программирования С#, методы генерации случайных событий, среда моделирования Blender, для создания 3D объектов и Adobe Photoshop для реализации графического интерфейса пользователя. Цель работы – разработать казуальное игровое приложения для развития аналитического мышления.Currently, the mobile games market is actively developing. Mobile games account for 33% of all app downloads. Games are a continuous learning process for users. People do not stop learning after a while, they are constantly developing and moving forward. The object of research is the Unity platform, in which a game application has been developed, the Microsoft Visual Studio development environment for writing scripts in the C # programming language, methods for generating random events, the Blender modeling environment for creating 3D objects and Adobe Photoshop for implementing a graphical user interface. The purpose of the work is to develop a casual game application for the development of analytical thinking