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MOVING FRAMES ON GENERALIZED FINSLER STRUCTURES
Sabau, Sorin V.,Shibuya, Kazuhiro,Shimada, Hideo Korean Mathematical Society 2012 대한수학회지 Vol.49 No.6
We study the relation between an R-Cartan structure ${\alpha}$ an an (I, J, K)-generalized Finsler structure ${\omega}$ on a 3-manifold ${\Sigma}$ showing the difficulty in finding a general transformation that maps ${\alpha}$ to ${\omega}$. In some particular cases, the mapping can be uniquely determined by geometrical conditions. Moreover, we are led in this way to a negative answer to our conjecture in [12].
Panashe Sabau,Jun Jie Chong,Aghil Jafari,Subham Agrawal,Chathura Semasinghe,Appolinaire Etoundi 제어로봇시스템학회 2020 제어로봇시스템학회 국제학술대회 논문집 Vol.2020 No.10
In the past century many medical advancements in prosthetics have been achieved, however, discomfort in prosthetic socket remains one of the toughest challenges faced by both amputees and prosthetists. Wearing an uncomfortable socket can lead to users discontinuing use of their socket and subsequently reducing their long-term mobility; negatively impact their psychological health; and prolong rehabilitation. This paper continues the research conducted in earlier publications [1], [2], which introduced the concept of an automated ISO standard robotic testing rig to test a full artificial limb prosthesis (a bio-inspired transfemoral prosthetic socket attached to robotic prosthetic joints and an ankle joint). This paper presents an automated method of designing the bio-inspired socket using artificial intelligence to reduce discomfort and the design time of new or existing full artificial lower limbs using qualitative and quantitative data. The socket will be tested in a gait simulation shown in the figure 7, to safely achieve desirable walking velocities, step length, safety and comfort while consequentially reducing the physical testing on patients and consequentially reduce physical testing on patients.
Navigating the AI Ascendancy: Evaluating U.S. Policies in the Sino–American AI Race
Timothy Sabau,이대우 한국국방연구원 2023 The Korean Journal of Defense Analysis Vol.35 No.3
As China’s ascendancy in Artificial Intelligence (AI) potentially surpasses that of the United States in specific dimensions, this research article critically assesses the existing and proposed AI policies of the United States, incorporating recommendations from the U.S. National Security Commission on AI (NSCAI). The research uses dual-scoring metrics based on the NSCAI-proposed AI stack and an original stakeholder metric to provide quantifiable variables to assess the potential impact of a policy, capturing feasible policy proposals. This analysis creates a practical tool for policy analysts and researchers to evaluate AI policies, which includes a tiered policy structure based on overall scores from the dualscoring metrics. Given the significance of AI in future national development, our model aims to aid policymakers in discerning the merit and feasibility of specific AI policies, thereby facilitating informed policymaking and development.
Moving frames on generalized Finsler structures
Sorin V. Sabau,Kazuhiro Shibuya,Hideo Shimada 대한수학회 2012 대한수학회지 Vol.49 No.6
We study the relation between an R-Cartan structure and an (I, J,K)-generalized Finsler structure ! on a 3-manifold showing the difficulty in finding a general transformation that maps to !. In some particular cases, the mapping can be uniquely determined by geometrical conditions. Moreover, we are led in this way to a negative answer to our conjecture in [12].
Olariu, Radu,Moser, Helen Laura,Lese, Ioana,Sabau, Dan,Georgescu, Alexandru Valentin,Grobbelaar, Adriaan Ockert,Constantinescu, Mihai Adrian Korean Society of Plastic and Reconstructive Surge 2020 Archives of Plastic Surgery Vol.47 No.3
Background Perforator flaps have led to a revolution in reconstructive surgery by reducing donor site morbidity. However, many surgeons have witnessed partial flap necrosis. Experimental methods to increase inflow have relied on adding a separate pedicle to the flap. The aim of our study was to experimentally determine whether increasing blood flow in the perforator pedicle itself could benefit flap survival. Methods In 30 male Lewis rats, an extended posterior thigh perforator flap was elevated and the pedicle was dissected to its origin from the femoral vessels. The rats were assigned to three groups: control (group I), acute inflow (group II) and arterial preconditioning (group III) depending on the timing of ligation of the femoral artery distal to the site of pedicle emergence. Digital planimetry was performed on postoperative day (POD) 7 and all flaps were monitored using laser Doppler flowmetry perioperatively and postoperatively in three regions (P1-proximal flap, P2-middle of the flap, P3-distal flap). Results Digital planimetry showed the highest area of survival in group II (78.12%±8.38%), followed by groups III and I. The laser Doppler results showed statistically significant higher values in group II on POD 7 for P2 and P3. At P3, only group II recorded an increase in the flow on POD 7 in comparison to POD 1. Conclusions Optimization of arterial inflow, regardless if performed acutely or as preconditioning, led to increased flap survival in a rat perforator flap model.
Osteomyelitis: A Descriptive Study
Laura Prieto-Pérez,Ramón Pérez-Tanoira,Elizabet Petkova-Saiz,Concepción Pérez-Jorge,Cristina Lopez-Rodriguez,Beatriz Alvarez-Alvarez,Jorge Polo-Sabau,Jaime Esteban 대한정형외과학회 2014 Clinics in Orthopedic Surgery Vol.6 No.1
Background: To analyze the incidence and clinical-microbiological characteristics of osteomyelitis (OM) in a tertiary Spanish hospital. Methods: All cases diagnosed with OM between January 2007 and December 2010 were retrospectively reviewed. The variablesexamined include epidemiological characteristics, risk factors, affected bone, radiographic changes, histology, microbiological cultureresults, antibiotic treatment, and the need for surgery. Results: Sixty-three cases of OM were diagnosed. Twenty-six patients (41.3%) had acute OM whereas 37 patients (58.7%) wereclassified as chronic OM. OM may result from haematogenous or contiguous microbial seeding. In this group, 49 patients (77.8%)presented with OM secondary to a contiguous source of infection and 14 patients had hematogenous OM (22.2%). Staphylococcusaureus was the most commonly found microorganism. Conclusions: OM mainly affected patients with risk factors related to the presence of vascular diseases. Antibiotic treatmentmust be guided by susceptibility patterns of individual microorganisms, although it must be performed together with surgery inmost of the cases.