16,954 research outputs found

    Practicing the Perfections: \u3ci\u3eCommunitas\u3c/i\u3e During the \u3ci\u3eSaga Dawa Kortsay\u3c/i\u3e at Swayambhunath, Nepal

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    Based on observations from personal participation in the 2014 Saga Dawa Kortsay at Swayambhunath Stupa complex located near Kathmandu, Nepal, my essay draws attention to the distinctive lay Buddhist community that is formed in such ritual performances. Using Victor Turner’s concept of communitas, I argue that the liminal experience of the pilgrimage enables the constitution of a distinctive lay Buddhist community in terms of the self-transformation usually reserved for monastic practitioners. In contrast to recent accounts of Nepali pilgrimage that emphasize the subordinate role of the lay community in the Buddhist sangha, I argue that lay participants in ritual performances like the Saga Dawa Kortsay cultivate individual and collective identities as members of the sangha in their own right, with their own responsibilities for practicing and preserving Buddhist teachings. Through discussions of the Swayambunath complex, pilgrims’ efforts toward self-transformation, and their practice of Buddhist perfections through donations to mendicants, I use the example of the Saga Dawa Kortsay to explain how a distinctive lay Buddhist community is formed by pilgrims through the situation of communitas

    Enforcement of Forum-Selection Clauses in Federal Court After \u3cem\u3eAtlantic Marine\u3c/em\u3e

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    Forum-selection clauses are important agreements that limit exposure to risk of litigation in an undesired locale. The enforcement of forum-selection clauses in the U.S. federal court system was not always certain, but today, such agreements are broadly considered enforceable. Courts, however, are split as to whether such clauses are governed by state or federal law and as to the proper procedural mechanism for enforcement. Recently, in Atlantic Marine Construction Co. v. U.S. District Court, the U.S. Supreme Court made strides toward resolving these disagreements among lower courts. This Note explores the history of enforcement of forum-selection clauses in federal court and articulates the legal complexities that remain in the wake of Atlantic Marine. It argues that Atlantic Marine implicitly resolved the choice-of-law split in favor of applying state substantive law to determine a forum clause’s validity and federal procedural law to determine its enforceability. To effectuate this implicit resolution, this Note proposes that courts engage in a two-step analysis in evaluating motions to enforce forum-selection clauses and that litigants bring such motions under Federal Rules of Civil Procedure 12(b)(6), 12(c), or 56

    Predictions of Cockpit Simulator Experimental Outcome Using System Models

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    This study involved predicting the outcome of a cockpit simulator experiment where pilots used cockpit displays of traffic information (CDTI) to establish and maintain in-trail spacing behind a lead aircraft during approach. The experiments were run on the NASA Ames Research Center multicab cockpit simulator facility. Prior to the experiments, a mathematical model of the pilot/aircraft/CDTI flight system was developed which included relative in-trail and vertical dynamics between aircraft in the approach string. This model was used to construct a digital simulation of the string dynamics including response to initial position errors. The model was then used to predict the outcome of the in-trail following cockpit simulator experiments. Outcome included performance and sensitivity to different separation criteria. The experimental results were then used to evaluate the model and its prediction accuracy. Lessons learned in this modeling and prediction study are noted

    Information and display requirements for independent landing monitors

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    The ways an Independent Landing Monitor (ILM) may be used to complement the automatic landing function were studied. In particular, a systematic procedure was devised to establish the information and display requirements of an ILM during the landing phase of the flight. Functionally, the ILM system is designed to aid the crew in assessing whether the total system (e.g., avionics, aircraft, ground navigation aids, external disturbances) performance is acceptable, and, in case of anomaly, to provide adequate information to the crew to select the least unsafe of the available alternatives. Economically, this concept raises the possibility of reducing the primary autoland system redundancy and associated equipment and maintenance costs. The required level of safety for the overall system would in these cases be maintained by upgrading the backup manual system capability via the ILM. A safety budget analysis was used to establish the reliability requirements for the ILM. These requirements were used as constraints in devising the fault detection scheme. Covariance propagation methods were used with a linearized system model to establish the time required to correct manually perturbed states due to the fault. Time-to-detect and time-to-correct requirements were combined to devise appropriate altitudes and strategies for fault recovery

    Constituent quark scaling violation due to baryon number transport

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    In ultra-relativistic heavy ion collisions at \roots\approx200 GeV, the azimuthal emission anisotropy of hadrons with low and intermediate transverse momentum (pT≲4p_T\lesssim 4 GeV/c) displays an intriguing scaling. In particular, the baryon (meson) emission patterns are consistent with a scenario in which a bulk medium of flowing quarks coalesces into three-quark (two-quark) "bags." While a full understanding of this number of constituent quark (NCQ) scaling remains elusive, it is suggestive of a thermalized bulk system characterized by colored dynamical degrees of freedom-- a quark-gluon plasma (QGP). In this scenario, one expects the scaling to break down as the central energy density is reduced below the QGP formation threshold; for this reason, NCQ-scaling violation searches are of interest in the energy scan program at the Relativistic Heavy Ion Collider (RHIC). However, as \roots is reduced, it is not only the initial energy density that changes; there is also an increase in the net baryon number at midrapidity, as stopping transports entrance-channel partons to midrapidity. This phenomenon can result in violations of simple NCQ scaling. Still in the context of the quark coalescence model, we describe a specific pattern for the break-down of the scaling that includes different flow strengths for particles and their anti-partners. Related complications in the search for recently suggested exotic phenomena are also discussed.Comment: 7 pages, 2 tables, 2 figures. Wording sharpened. Two tables added, to quantify the estimate of stopped quark fraction

    Nuclear recoil energy scale in liquid xenon with application to the direct detection of dark matter

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    We show for the first time that the quenching of electronic excitation from nuclear recoils in liquid xenon is well-described by Lindhard theory, if the nuclear recoil energy is reconstructed using the combined (scintillation and ionization) energy scale proposed by Shutt {\it et al.}. We argue for the adoption of this perspective in favor of the existing preference for reconstructing nuclear recoil energy solely from primary scintillation. We show that signal partitioning into scintillation and ionization is well-described by the Thomas-Imel box model. We discuss the implications for liquid xenon detectors aimed at the direct detection of dark matter

    Generation of optimum vertical profiles for an advanced flight management system

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    Algorithms for generating minimum fuel or minimum cost vertical profiles are derived and examined. The option for fixing the time of flight is included in the concepts developed. These algorithms form the basis for the design of an advanced on-board flight management system. The variations in the optimum vertical profiles (resulting from these concepts) due to variations in wind, takeoff mass, and range-to-destination are presented. Fuel savings due to optimum climb, free cruise altitude, and absorbing delays enroute are examined

    Evaluation of the usefulness of various simulation technology options for TERPS enhancement

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    Current approved terminal instrument procedures (TERPS) do not permit the full exploitation of the helicopter's unique flying characteristics. Enhanced TERPS need to be developed for a host of non-standard landing sites and navigation aids. Precision navigation systems such as microwave landing systems (MLS) and the Global Positioning System (GPS) open the possibility of curved paths, steep glide slopes, and decelerating helicopter approaches. This study evaluated the feasibility, benefits, and liabilities of using helicopter cockpit simulators in place of flight testing to develop enhanced TERPS criteria for non-standard flight profiles and navigation equipment. Near-term (2 to 5 year) requirements for conducting simulator studies to verify that they produce suitable data comparable to that obtained from previous flight tests are discussed. The long-term (5 to 10 year) research and development requirements to provide necessary modeling for continued simulator-based testing to develop enhanced TERPS criteria are also outlined
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