14,650 research outputs found

    Do Development Department Standards Deter Potential Affordable Housing in Los Angeles Areas? A Case Study

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    Development department standards for constructing new buildings are put in place for the general well being of the community and its buildings. Using a case study of a recent Santa Monica Mixed-Use project, the paper can analyze the building standards, programs, and other requirements put in place. The purpose of the case study was to highlight challenges and issues to project start-up created by the city’s standards to gain insight as to how standards may deter construction containing affordable housing units in the Los Angeles Area. Qualitative research was conducted through e-mail correspondence with the VP and development partner of a construction company. Issues with Santa Monica’s 2010 Land Use and Circulation Element standards were shown to be the most impactful to the project which created challenges dealing with community benefits such as public road improvements and public space incorporation. Other challenges highlighted were discrepancies regarding standard requirements between the development agreement and Architectural Review Board which created a 6-month delay. Using information gained from the case study it was determined that standards generally do not deter new construction, but if the standards are too stringent and the area’s market is too low, developers will be less inclined to build

    Global constraints on anomalous triple gauge couplings in effective field theory approach

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    We present a combined analysis of LHC Higgs data (signal strengths) together with LEP-2 WW production measurements. To characterize possible deviations from the Standard Model (SM) predictions, we employ the framework of an Effective Field Theory (EFT) where the SM is extended by higher-dimensional operators suppressed by the mass scale of new physics Λ\Lambda. The analysis is performed consistently at the order Λ−2\Lambda^{-2} in the EFT expansion keeping all the relevant operators. While the two data sets suffer from flat directions, together they impose stringent model-independent constraints on the anomalous triple gauge couplings. As a side product, we provide the results of the combined fit in different EFT bases.Comment: 7 pages. v2: References and clarifications adde

    The Orion Protostellar Explosion and Runaway Stars Revisited : Stellar Masses, Disk Retention, and an Outflow from the Becklin-Neugebauer Object

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    © 2020 The American Astronomical Society. All rights reserved.The proper motions of the three stars ejected from Orion's OMC1 cloud core are combined with the requirement that their center of mass is gravitationally bound to OMC1 to show that radio source I (Src I) is likely to have a mass around 15 M o˙ consistent with recent measurements. Src I, the star with the smallest proper motion, is suspected to be either an astronomical-unit-scale binary or a protostellar merger remnant produced by a dynamic interaction ∼550 yr ago. Near-infrared 2.2 μm images spanning ∼21 yr confirm the ∼55 km s -1 motion of "source x" (Src x) away from the site of stellar ejection and point of origin of the explosive OMC1 protostellar outflow. The radial velocities and masses of the Becklin-Neugebauer (BN) object and Src I constrain the radial velocity of Src x to be. Several high proper-motion radio sources near BN, including Zapata 11 ([ZRK2004] 11) and a diffuse source near IRc 23, may trace a slow bipolar outflow from BN. The massive disk around Src I is likely the surviving portion of a disk that existed prior to the stellar ejection. Though highly perturbed, shocked, and reoriented by the N-body interaction, enough time has elapsed to allow the disk to relax with its spin axis roughly orthogonal to the proper motion.Peer reviewedFinal Published versio

    Exploring various corona geometries and their emissivity profiles

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    viii, 82 leaves : ill. (chiefly col.) ; 29 cmIncludes abstract.Includes bibliographical references (leaves 79-82).The differences in emissivity profiles produced by various corona geometries are explored via general relativistic ray tracing simulations in order to better understand the inner disc region of active galactic nuclei. Emissivity profiles produced by point sources are distinguishable from those produced by cylindrical slabs and spheroidal coronae, but are indistinguishable from profiles produced by conical geometries, requiring an analysis of reflection fraction to differentiate them. Beamed point and beamed conical sources exhibit differences most evident in the reflection fraction. For point sources a relationship for the measured reflection fraction with source height and velocity is determined. Simulating spectra from the emissivity profiles produced by the various geometries produce distinguishable differences that do not exceed 15 per cent in the most extreme cases. Emissivity profiles are found to be useful in distinguishing point source and extended geometries given high quality spectral data of extreme, bright sources over long exposure times
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