Study of the Effect of a Closed-End Side Branch on Sinusoidally Perturbed Flow of Liquid in a Line

Classical undamped acoustic-wave theory was used to determine analytical relations among sinusoidal perturbations of pressure and flow at the ends of a hydraulic-transmission line having a closed-end branch of arbitrary length attached at an arbitrary point. Experimental data were obtained for the equilateral case (a branch half as long as the main line connected to the main line at the midpoint) at mean flow speeds of 5 to 10 feet per second. Measured pressure-perturbation ratios agreed closely with analytical predictions. As frequencies for which the branch length was an odd multiple of 1/4 wavelength, waves in the main line were almost completely reflected at the junction point

Pedestrian Detection with Wearable Cameras for the Blind: A Two-way Perspective

Blind people have limited access to information about their surroundings, which is important for ensuring one's safety, managing social interactions, and identifying approaching pedestrians. With advances in computer vision, wearable cameras can provide equitable access to such information. However, the always-on nature of these assistive technologies poses privacy concerns for parties that may get recorded. We explore this tension from both perspectives, those of sighted passersby and blind users, taking into account camera visibility, in-person versus remote experience, and extracted visual information. We conduct two studies: an online survey with MTurkers (N=206) and an in-person experience study between pairs of blind (N=10) and sighted (N=40) participants, where blind participants wear a working prototype for pedestrian detection and pass by sighted participants. Our results suggest that both of the perspectives of users and bystanders and the several factors mentioned above need to be carefully considered to mitigate potential social tensions.Comment: The 2020 ACM CHI Conference on Human Factors in Computing Systems (CHI 2020

Tooth serration morphologies in the genus Machimosaurus (Crocodylomorpha, Thalattosuchia) from the Late Jurassic of Europe

© 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. The attached file is the published version of the article

Buffalo Beauty in the Amethyst

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Variety is the Key: Teaching Shakespeare in Secondary English Classrooms

This thesis explores the reasons teachers teach Shakespeare, especially his plays, in Secondary English classrooms, which plays teachers teach and why they teach them, and a catalog of methods of teaching Shakespeare. The catalog includes methods of introduction, literary analysis, performance, multimedia, and technology, as well as methods that integrate multiple approaches. The thesis stresses the integration of multiple approaches and the employment of a variety of methods

Western Bean Cutworm Infestation Rates in Relation to their Location of the Platte River

According to DuPont Pioneer, Western Bean Cutworm (WBCW) larval infestations can reduce the corn yield by 15-20%. Western Bean Cutworm can be found throughout the Corn Belt and are destructive because their feeding may cause a variety of molds to be introduced to the ear, which reduces the grain quality and negatively affects yield. Genes such as Herculex may provide suppression, but a timely insecticide treatment will provide more control of the WBCW. Insecticide treatments can be applied aerially or by chemigation and are typically applied to prevent insect infestations or to control an infestation that is higher than desired. The type of insecticide used varies between producers, as well as what insect is being controlled. In this study, the WBCW is the insect that is under examination. Previous studies have examined economic injury levels and economic thresholds in corn as they relate to insects. Using proprietary data and comparative analysis, this study examines Western Bean Cutworm (WBCW) egg and larvae infestation counts in corn fields in Kearney, Phelps, and Dawson counties of Nebraska. The data was collected from corn fields within five miles of the Platte River, as well as from corn fields outside of the five mile range of the Platte River (referred to as Non Platte fields). The fields under examination were treated if the WBCW infestation was equal to or greater than 10%. The next section reviews previous studies in relation to this study

Microplastic Presence in Pacific Walrus Tissues

Examined microplastic presence in Pacific walrus muscle and blubber, as well as trends in age and sex