252 research outputs found

    Cyriax\u27 syndrome: slipping rib syndrome; a review, analysis, and commentary

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    Tactical and Logistical Compromise in the Management of Combat

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    In combat operations, sustainability as well as flexibility are paramount concern. Health maintenance and casualty management programs are crucial underpinnings of any such plans and must be thouroughly intrgrated with tactical operations. The structure and operation of medical services is essentially a function of command direction, and the decision for a specific form of supporting activity in any given maneuver is ultimately the responsibility of the operational commander

    2D-based indoor mobile laser scanning for construction digital mapping application

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    A common issue which occurs often in construction projects is how to determine the discrepancies between as-built or existing constructions and initial design. Physical manual measurement usually brings many of problems such as long measuring time, high labor consumption, and measurement error accumulation and in some cases lower accuracy. Therefore, more advanced technologies such as laser scanning and total station, which are used in geospatial mapping and surveying have been adopted in order to provide much more reliable and accurate measurements. However, technical and financial issues still constrain the widespread applications of well-known 3-dimensional (3D) terrestrial and aerial laser scanning, such as high equipment cost, complex pre-preparation, inconvenience of use and spatial limitation. This paper aims to introduce an innovative laser scanning method for indoor construction mapping. This method integrates an IMU-GPS positioning approach with a more convenient, more time saving and lower costed 2-dimensional (2D) laser scanner to realize indoor mobile 3D mapping for construction model creation, which can be integrated with Building Information Modelling (BIM) design in order to realize the applications, such as quality control of as-built construction or indoor mapping of existing building. Although compared with traditional 3D laser scanning, its accuracy and reliability cannot reach such a high level currently, experimental results still indicate feasibility, reliability and potential capability of this indoor mobile laser scanning method. It is hoped that this method will be further improved to substitute the stationary 3D laser scanning for narrow and limited construction spatial mapping in the near future

    Gauge covariant fermion propagator in quenched, chirally-symmetric quantum electrodynamics

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    We discuss the chirally symmetric solution of the massless, quenched, Dyson-Schwinger equation for the fermion propagator in three and four dimensions. The solutions are manifestly gauge covariant. We consider a gauge covariance constraint on the fermion--gauge-boson vertex, which motivates a vertex Ansatz that both satisfies the Ward identity when the fermion self-mass is zero and ensures gauge covariance of the fermion propagator.Comment: 11 pages. REVTEX 3.0. ANL-PHY-7711-TH-9

    BIM-based multidisciplinary building design practice - a case study

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    Purpose / Context - As the emerging digital technology, Building Information Modelling has been applied in the multidisciplinary design work for sustainable houses. This study aims to input the real-world design context into the BIM pedagogy and to demonstrate the capacity of BIM in enhancing teamwork in the cross-disciplinary collaboration. Methodology / Approach – A case study of a Saint Lucia-based residential house project was adopted by utilizing BIM as the platform to carry on the redesign plan differing from an existing de-sign. Nine different student design teams from the University of Nottingham Ningbo China, each team consisting of students from architecture, civil engineering, and architectural environmental engineering, worked in the BIM-based platform to provide solutions on architectural model, structural design, cost estimate, and sustainability in terms of energy efficiency. Each team’s design plan was presented and evaluated by academics, the client, and construction professionals. Results – The case study demonstrates the capacity of BIM in assisting the cross-disciplinary pro-ject design. BIM learners gained the practical experience in the team design work. As the project deliverable, different design plans were evaluated by the client and the contractor for further devel-opments. The BIM project experience from team members was also presented in this study. Key Findings / Implications – The BIM education provides the insights of how colleague educa-tion could equip students with the state-of-the-art learning experience by incorporating the real-world project into the BIM pedagogy. BIM, as the coordination platform, could be fully utilized to implement the building design. This case project serves as an example of briding the gap between BIM academ-ia and industry. Future BIM education could continue adopting the case study-based experiential learning approach and expand BIM applications from design to the construction stage. Originality – This work provides the case study in the pedagogical practice demonstrating the BIM-enabled multidisciplinary collaboration in architectural visualization, structural design, budget control, and sustainability strategies
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