1,481 research outputs found

    Heavy Civil Estimating Module for CM 314

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    In the past, through engagement with students that have gone through the Heavy Civil class, it has been found that student understanding of typical heavy civil operations is subpar. Through an updated course module that focuses on estimating the four major operations, Earthwork, Underground, Asphalt, and Concrete, students will gain a deeper understanding of the heavy civil field of construction. The module consists of four assignments that pertain to the previously mentioned operations. Each contain a lecture detailing typical crew compositions and cycle times, reference material and resources the student can use when completing the assignments. This new module will challenge student critical thinking skills and provide a deeper understanding of heavy civil operations

    Locally constrained homomorphisms on graphs of bounded treewidth and bounded degree.

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    A homomorphism from a graph G to a graph H is locally bijective, surjective, or injective if its restriction to the neighborhood of every vertex of G is bijective, surjective, or injective, respectively. We prove that the problems of testing whether a given graph G allows a homomorphism to a given graph H that is locally bijective, surjective, or injective, respectively, are NP-complete, even when G has pathwidth at most 5, 4 or 2, respectively, or when both G and H have maximum degree 3. We complement these hardness results by showing that the three problems are polynomial-time solvable if G has bounded treewidth and in addition G or H has bounded maximum degree

    Reactive direction control for a mobile robot: A locust-like control of escape direction emerges when a bilateral pair of model locust visual neurons are integrated

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    Locusts possess a bilateral pair of uniquely identifiable visual neurons that respond vigorously to the image of an approaching object. These neurons are called the lobula giant movement detectors (LGMDs). The locust LGMDs have been extensively studied and this has lead to the development of an LGMD model for use as an artificial collision detector in robotic applications. To date, robots have been equipped with only a single, central artificial LGMD sensor, and this triggers a non-directional stop or rotation when a potentially colliding object is detected. Clearly, for a robot to behave autonomously, it must react differently to stimuli approaching from different directions. In this study, we implement a bilateral pair of LGMD models in Khepera robots equipped with normal and panoramic cameras. We integrate the responses of these LGMD models using methodologies inspired by research on escape direction control in cockroaches. Using ‘randomised winner-take-all’ or ‘steering wheel’ algorithms for LGMD model integration, the khepera robots could escape an approaching threat in real time and with a similar distribution of escape directions as real locusts. We also found that by optimising these algorithms, we could use them to integrate the left and right DCMD responses of real jumping locusts offline and reproduce the actual escape directions that the locusts took in a particular trial. Our results significantly advance the development of an artificial collision detection and evasion system based on the locust LGMD by allowing it reactive control over robot behaviour. The success of this approach may also indicate some important areas to be pursued in future biological research

    TOI-5375 B: A Very Low Mass Star at the Hydrogen-Burning Limit Orbiting an Early M-type Star

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    The TESS mission detected a companion orbiting TIC 71268730, categorized it as a planet candidate, and designated the system TOI-5375. Our follow-up analysis using radial velocity data from the Habitable-zone Planet Finder (HPF), photometric data from Red Buttes Observatory (RBO), and speckle imaging with NN-EXPLORE Exoplanet Stellar Speckle Imager (NESSI) determined that the companion is a very low mass star (VLMS) near the hydrogen-burning mass limit with a mass of 0.080\pm{0.002} M_{\Sun} (83.81±2.10MJ83.81\pm{2.10} M_{J}), a radius of 0.1114^{+0.0048}_{-0.0050} R_{\Sun} (1.08410.04870.0467RJ^{0.0467}_{0.0487} R_{J}), and brightness temperature of 2600±702600\pm{70} K. This object orbits with a period of 1.721553±0.000001\pm{0.000001} days around an early M dwarf star (0.62\pm{0.016}M_{\Sun}). TESS photometry shows regular variations in the host star's TESS light curve, which we interpreted as activity-induced variation of ∼\sim2\%, and used this variability to measure the host star's stellar rotation period of 1.9716−0.0083+0.0080^{+0.0080}_{-0.0083} days. The TOI-5375 system provides tight constraints on stellar models of low-mass stars at the hydrogen-burning limit and adds to the population in this important region.Comment: 15 pages, 8 figures, Accepted to the Astronomical Journa

    Development of Genomic Resources for Pacific Herring through Targeted Transcriptome Pyrosequencing

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    Pacific herring (Clupea pallasii) support commercially and culturally important fisheries but have experienced significant additional pressure from a variety of anthropogenic and environmental sources. In order to provide genomic resources to facilitate organismal and population level research, high-throughput pyrosequencing (Roche 454) was carried out on transcriptome libraries from liver and testes samples taken in Prince William Sound, the Bering Sea, and the Gulf of Alaska. Over 40,000 contigs were identified with an average length of 728 bp. We describe an annotated transcriptome as well as a workflow for single nucleotide polymorphism (SNP) discovery and validation. A subset of 96 candidate SNPs chosen from 10,933 potential SNPs, were tested using a combination of Sanger sequencing and high-resolution melt-curve analysis. Five SNPs supported between-ocean-basin differentiation, while one SNP associated with immune function provided high differentiation between Prince William Sound and Kodiak Island within the Gulf of Alaska. These genomic resources provide a basis for environmental physiology studies and opportunities for marker development and subsequent population structure analysis

    1960: Abilene Christian College Lectures - Full Text

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    Table of Contents: Theme Speeches: Christian Faith in the Modern World Basis of Faith - Leonard Mullens - 9 Authority in Christianity - John T. Smithson, Jr. - 27 Origin and Preservation of the Bible - Neil R. Lightfoot - 44 Alleged Discrepancies of the Bible - David H. Bobo - 62 The Unity of the Bible - Jack Meyer - 91 Faith and Reason - Joe Sanders - 115 The Reasonableness of Supernaturalism - Virgil Trout - 126 The Present Statue of the Doctrine of Organic Evolution - J.D. Thomas - 146 The Nature of Man - Roy F. Osborne, Jr. - 181 Modern Challenges to Christian Morals - Carl Spain - 199 The Christ, Whose Son is He? - Gordon Teel - 232 Special Speeches Teaching the Word of God in Korea - L. Haskell Chessfire - 255 The Influence of Christian Education - Judge Jack Pope - 276 Mission Opportunities in the Far East - Harry Robert Fox - 288 Mission Work in Austria - Robert Skelton - 303 Report from Switzerland - Heinrich Blum - 313 The Work in Nigeria - Rees Byrant - 320 The Training of Evangelists in Foreign Fields - Reiner Kallus - 331 Christian Scholarships - Everett Ferguson - 340 Evangelizing the World - A.R. Holton - 349 Panel Discussions The Significance of the Dead Sea Scrolls The Scrolls and the Text of the Bible - Paul Rotenberry - 357 The Relation between the Religion of the Essenes and that of Early Christians - Jay Smith - 366 Biblical Interpretation Expediency and Pattern Authority - J.W. Roberts - 381 Examples in Pattern Authority - Thomas B. Warren - 392 Mental Health and Sin The Present State of Mental Health Knowledge - Donald R. Sime - 409 The Relationship of Mental Health Problems to Sin - Paul Easley - 421 The Teenager The Problems of Youth - Mack Wayne Craig - 432 Influences for Good - Wyatt Sawyer - 443 The Benefits of Abilene Christian College To the Church - Hulen Jackson - 451 To The Home - Robert S. Bell - 459 \u27To the Community - Louie Welch - 465 Expenses At Abilene Christian College - James C. Kerr - 469 The Graduate School at Abilene Christian College What I Am Getting Now in the ACC Graduate Program - Harold Vanderpool - 475 How the ACC Graduate Program Has Stood Up - Everett Ferguson - 481 What the ACC Graduate Program Ought To Be - Frank Pack - 486 The Importance to the Church of the ACC Graduate Program A.R. Holton - 490 Beware: Large File Size Uploaded by Jackson Hage

    Supersymmetric Dark Matter and Yukawa Unification

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    An analysis of supersymmetric dark matter under the Yukawa unification constraint is given. The analysis utilizes the recently discovered region of the parameter space of models with gaugino mass nonuniversalities where large negative supersymmetric corrections to the b quark mass appear to allow b−τb-\tau unification for a positive μ\mu sign consistent with the b→s+γb\to s+\gamma and gμ−2g_{\mu}-2 constraints. In the present analysis we use the revised theoretical determination of aμSMa_{\mu}^{SM} (aμ=(gμ−2)/2a_{\mu}= (g_{\mu}-2)/2) in computing the difference aμexp−aμSMa_{\mu}^{exp}-a_{\mu}^{SM} which takes account of a reevaluation of the light by light contribution which has a positive sign. The analysis shows that the region of the parameter space with nonuniversalities of the gaugino masses which allows for unification of Yukawa couplings also contains regions which allow satisfaction of the relic density constraint. Specifically we find that the lightest neutralino mass consistent with the relic density constraint, bτb\tau unification for SU(5) and b−t−τb-t-\tau unification for SO(10) in addition to other constraints lies in the region below 80 GeV. An analysis of the maximum and the minimum neutralino-proton scalar cross section for the allowed parameter space including the effect of a new determination of the pion-nucleon sigma term is also given. It is found that the full parameter space for this class of models can be explored in the next generation of proposed dark matter detectors.Comment: 28 pages,nLatex including 5 fig

    Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV

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    A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440 GeV range is excluded at 95% confidence level.Comment: Submitted to JHE
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