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Statistical models from weigh-in-motion data
Tommy H.T. Chan,T. J. Miao,Demeke B. Ashebo 국제구조공학회 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.20 No.1
This paper aims at formulating various statistical models for the study of a ten year Weighin-Motion (WIM) data collected from various WIM stations in Hong Kong. In order to study the bridge live load model it is important to determine the mathematical distributions of different load affecting parameters such as gross vehicle weights, axle weights, axle spacings, average daily number of trucks etc. Each of the above parameters is analyzed by various stochastic processes in order to obtain the mathematical distributions and the Maximum Likelihood Estimation (MLE) method is adopted to calculate the statistical parameters, expected values and standard deviations from the given samples of data. The Kolmogorov-Smirnov (K-S) method of approach is used to check the suitability of the statistical model selected for the particular parameter and the Monte Carlo method is used to simulate the distributions of maximum value stochastic processes of a series of given stochastic processes. Using the statistical analysis approach the maximum value of gross vehicle weight and axle weight in bridge design life has been determined and the distribution functions of these parameters are obtained under both free-flowing traffic and dense traffic status. The maximum value of bending moments and shears for wide range of simple spans are obtained by extrapolation. It has been observed that the obtained maximum values of the gross vehicle weight and axle weight from this study are very close to their legal limitations of Hong Kong which are 42 tonnes for gross weight and 10 tonnes for axle weight.
Penetrating Neck Injury Involving Wooden Foreign Bodies: Case Report
Tommy Alfandy Nazwar,Farhad Balafif,Donny Wisnu Wardhana,Christin Panjaitan 대한신경손상학회 2023 Korean Journal of Neurotrauma Vol.19 No.4
Although rare, penetrating neck injuries can have grave consequences, and are associated with high mortality rates. Individuals with cervical injuries due to wooden foreign bodies are at an increased risk of developing infectious complications. In this case, a male patient aged 27 years presented with a cervical injury indicative of a penetrating wound caused by a wooden foreign body. Computed tomography (CT) scan revealed no signs of intracranial hemorrhage or fracture. Additionally, cervical CT scan showed no evidence of cervical corpus or longus colli muscle lesions. The medical team suggested a cervical magnetic resonance imaging (MRI) examination; however, the patient’s family opted out. Subsequently, the patient underwent wound debridement, which involved the extraction of a fragment of impaling wood. Two days after the procedure, the patient developed a fever and weakness of the shoulder and arm on the ipsilateral side. Following the process of re-education, the family provided consent for MRI examination. A subsequent surgical procedure was performed on the patient based on the MRI findings and clinical presentation. Residual wooden fragments were effectively extracted, resulting in positive progression of the patient’s condition.
Acquired Tastes: Urban Impacts on Jeju Shamanic Ritual
Tommy Tran 한국학중앙연구원 한국학중앙연구원 2018 THE REVIEW OF KOREAN STUDIES Vol.21 No.1
What are the implications of a Starbucks bag tied on a tree as an offering to village gods or a Buddhist chant intoned in place of a shamanic invocation? This article re-considers the cultural meanings of practical material changes in Jeju shamanism in relation to its rapid urbanization since the early 2000s. Though often romanticized as an idyllic rural paradise or a bastion of shamanic practice, Jeju City has grown into a large complex and cosmopolitan city with constant access to international markets. Urban change had a profound impact on Jeju shamanism in every aspect. Once purely region- and community-specific, shamanic rituals, despite their decline in the depopulating countryside, have seen in some aspects an accidental vitality that came with urban interactions. Mainland Korean and foreign goods grace altars and the changed pace of life prompts practitioners to adopt new forms to keep old meanings. This article observes that as rural communities proactively maintain shamanic rites, they hardly are passive recipients of new things and ideas from the city that looms large over them. Although numbers of rural shrine worshippers are indeed declining, where rituals remain pertinent to local communities, Jeju shamanism’s interactions with urbanization demonstrate significant, and sometimes accidental, dynamism.
The Aspirations of Direct Aspiration for Thrombectomy in Ischemic Stroke: A Critical Analysis
Tommy Andersson,Martin Wiesmann,Omid Nikoubashman,Anil Gopinathan,Pervinder Bhogal,Leonard L.L. Yeo 대한뇌졸중학회 2019 Journal of stroke Vol.21 No.1
The treatment of acute ischemic stroke by mechanical thrombectomy has been revolutionary, however most of the clinical trials were done with the use a stent retriever. At the same time, an alternative technique of thrombectomy through direct aspiration with a large bore distal access catheter at the face of the clot is rapidly gaining popularity. Nonetheless, the data supporting this new technique is not yet as mature as that available on stent retrievers. This review is a critical analysis of the evidence supporting the principle of direct aspiration thrombectomy and a discussion of its potential strengths and weaknesses in comparison to the available studies on stent retrievers. While this is by no means a conclusive review, it should serve as a yardstick of where the science is currently, and what are the next trials that are necessary.
Tommy Tran 고려대학교 민족문화연구원 2015 Cross-Currents Vol.- No.17
This article examines how urban space in Cheju City can be imagined as a site of experience and identity. The rapid development of Cheju City on Cheju Island, the Republic of Korea’s prime resort and ecological heritage destination, has foregrounded tensions between global tourism and local identity. How people experience cities physically has an intimate connection with how they imagine and represent urban space. Cheju City, which has transformed from being the modest seat of a long-marginalized periphery into a burgeoning tourism hub, is a battleground on which differing visions of urban space as the location of culture are staged. Such debates are as much about the right to represent identity as about the right to use urban space. While urban redevelopment in Cheju City erases entire city blocks for tourist facilities and elaborate monuments to distant pasts, emergent social movements are rearticulating sites of memory to recover a sense of a Cheju-specific landscape and to redefine local identity. Using ongoing ethnographic and archival research conducted since 2012, this article demonstrates how a new urban heritage paradigm is emerging in Cheju. Heritage is no longer confined to essentialist conclusions drawn from rural folklore but now directly addresses urban experience.
Translating Integer Factoring into Graph Coloring
Jensen, Tommy Rene Department of Mathematics 2016 Kyungpook mathematical journal Vol.56 No.2
This paper gives for every positive integer n an explicit construction of a graph G with fewer than $15{\log}^2n-{\frac{5}{2}}{\log}n+28$ vertices, such that there exists a nontrivial factoring of n if and only if G is 3-colorable.