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800㎿급 발전소 복수기의 최적 운전점 및 운전방법에 대한 연구
장철호(Cheol-Ho Jang),홍은기(Eun-Kee Hong),황광원(Kwang-Won Hwang),윤린(Rin Yun) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
Along with the recent construction of a 800㎿ thermal power plant it is necessary to check the soundness of the current operation of the condenser, and to investigate the effects of vacuum level of it on the turbine efficiency for the power plant. In this study, the performances of the condenser and the turbine for the 800㎿ thermal power plant were tested based on the ASME PTC 6 and ASME PTC 12.2 with the variation of the vacuum level. When the condenser vacuum levels were 719.91 ㎜Hg, 724.5 ㎜Hg, and 729.6 ㎜Hg, the turbine efficiencies were 47.36%, 47.47%, and 47.55%, respectively. From the regression analysis of the present data, it was estimated that the optimal vacuum point is between 729 ㎜Hg and 731 ㎜Hg. When this optimal point is to be applied to the condenser, the profit of 5.5 billion won/year is expected based on the '09 caloric cost.
김병호 ( Byung Ho Kim ),감신 ( Sin Kam ),배상근 ( Sang Geun Bae ),김건엽 ( Keon-yeop Kim ),이원기 ( Won Kee Lee ),홍남수 ( Nam-soo Hong ),박형근 ( Hyeung-keun Park ),이혜진 ( Heyjean Lee ),조은정 ( Eun-jung Cho ),채성철 ( Shung C 한국보건정보통계학회(구 한국보건통계학회) 2017 보건정보통계학회지 Vol.42 No.1
Objectives: This study was conducted to investigate economic feasibility of operating Regional Cardiocerebrovascular Centers using cost-benefit analysis. Methods: The current study assessed cost and benefit data collected from nine hospitals which were designated as Regional Cardiocerebrovascular Centers between 2008 and 2010. Results: The operation of Regional Cardiocerebrovascular Centers reduced mortality rate and length of stay due to acute myocardial infarction and stroke and also decreased disability occurred after stroke. The total calculated cost of operating nine Regional Cardiocerebrovascular Centers was 19.85-22.30 billion won and the minimum benefit calculated was 23.98 billion won. Applying the maximum cost and the minimum benefit, the net benefit was 1.68 billion won, which is estimated to 190 million won per Regional Cardiocerebrovascular Center. Conclusions: The present study revealed that the operation of Regional Cardiocerebrovascular Centers was economically beneficial. The benefit would be larger if intangible benefit such as the long-term effects to community hospitals and enhancement of quality of life of patients and their families are considered.
Design and Evaluation of Telematics User Interface for Ubiquitous Vehicle
Hong, Won-Kee,Kim, Tae-Hwan,Ko, Jaepil Korea Society of Industrial Information Systems 2014 한국산업정보학회논문지 Vol.19 No.3
In the ubiquitous computing environment, a ubiquitous vehicle will be a communication node in the vehicular network as well as the means of ground transportation. It will make humans and vehicles seamlessly and remotely connected. Especially, one of the prominent services in the ubiquitous vehicle is the vehicle remote operation. However, mutual-collaboration with the in-vehicle communication network, the vehicle-to-vehicle communication network and the vehicle-to-roadside communication network is required to provide vehicle remote operation services. In this paper, an Internet-based human-vehicle interfaces and a network architecture is presented to provide remote vehicle control and diagnosis services. The performance of the proposed system is evaluated through a design and implementation in terms of the round trip time taken to get a vehicle remote operation service.
Hong Sunmok,Jeon Jihui,Chang Won Kee 대한근전도전기진단의학회 2023 대한근전도 전기진단의학회지 Vol.25 No.1
Cranial neuropathy and radiculopathy are common complications of tuberculous meningitis. However, the co-occurrence of these complications and the corresponding electrodiagnostic findings have rarely been reported. We report a patient diagnosed with tuberculous meningitis who presented with difficulty in smelling, facial paralysis, hearing loss, and severe weakness in the bilateral lower extremities. A neurological examination confirmed impaired function of the olfactory nerves. Electrodiagnostic studies, including a nerve conduction study, electromyography, and brainstem auditory evoked potential, revealed multiple cranial neuropathies involving the left facial nerve and bilateral vestibulocochlear nerves, as well as bilateral lumbosacral polyradiculopathies. In patients with tuberculous meningitis, multiple cranial neuropathies and polyradiculopathies can occur simultaneously as complications, and electrodiagnostic studies can enable an accurate diagnosis of these complications and an assessment of their severity.
Hong, Won-Kee,Park, Seon-Chee,Lee, Ho-Chan,Kim, Jin-Min,Kim, Seung-Il,Lee, Seung-Geun,Yoon, Ki-Joon John Wiley Sons, Ltd. 2010 The structural design of tall and special building Vol.19 No.6
<P>The authors present an experimental and analytical investigation of the modularized hybrid system (MHS) that utilizes the composite structure described in previous studies, that of a wide steel flange and precast concrete. The objective of this paper was to introduce the application of the MHS structural system to a high-rise building in which one additional floor was added while the overall building height was maintained. The 68-m-tall, 18-storey steel building was redesigned to a 19-storey building using the composite beams, which combine the merits of ductile steel and concrete components to withstand external loading while reducing floor height. The bottom flange of the steel beam is reinforced with concrete at a manufacturing plant, eliminating the use of temporary pour forms. The erection process of the composite beams is identical to that of traditional steel construction. This paper also describes more than 30 potential applications of high-rise composite construction using the MHS frames. The advantages of the MHS are presented in terms of reduced structural steel tonnage and shortened construction schedules. Copyright © 2009 John Wiley & Sons, Ltd.</P>
Hong, Won-Kee,Park, Seon-Chee,Kim, Jin-Min,Lee, Seung-Geun,Kim, Seung-Il,Yoon, Ki-Joon,Lee, Ho-Chan John Wiley Sons, Ltd. 2010 The structural design of tall and special building Vol.19 No.3
<P>An experimental investigation of composite beams composed of wide flange steel and precast concrete is presented. The bottom flange of the steel section is encased in precast concrete. Utilizing the merits of both steel and concrete material, the size of the steel beams can be reduced without sacrificing performance. The bottom flange of the steel beam is reinforced with concrete at a manufacturing plant, eliminating the use of temporary pour forms. The composite beams were tested to investigate how the size of the wide flange steel and how the top and bottom reinforcements influence the behaviour of the beams. Flexural load carrying capacity, load displacement relationships and failure modes were examined. The test specimens were T-shaped composite beams with slabs, each measuring 10-m long. The flexural moment strength of all of the composite beams—at both the yield limit state and the maximum load limit state—was measured and compared with the analytical flexural capacity.</P><P>The stiffness degradation, ductility and dissipating energy capabilities of the composite beams were investigated based on the hysteresis curves. The composite beams tested in this study successfully reduced both the floor height of the building and the size of the steel beams needed to meet code requirements. Copyright © 2008 John Wiley & Sons, Ltd.</P>
Association between genetic variants in pre-microRNAs and survival of early-stage NSCLC.
Hong, Mi Jeong,Choi, Yi Young,Jang, Ji-Ae,Jung, Hye-Jin,Lee, Shin Yup,Lee, Won Kee,Yoo, Seung Soo,Lee, Jaehee,Cha, Seung Ick,Kim, Chang Ho,Lee, Eungbae,Jeon, Hyo-Sung,Son, Ji Woong,Park, Jae Yong Lippincott Williams Wilkins 2013 Journal of thoracic oncology Vol.8 No.6
<P>MicroRNAs (miRNAs) are an abundant class of small non-protein-coding RNAs that function as negative gene regulators. Recent evidence indicates that altered miRNA expression plays an important role in the initiation and progression of lung cancer. Single nucleotide polymorphisms (SNPs) in pre-miRNAs could alter miRNAs processing, or expression, and hence, could influence the prognosis of lung cancer. To test this hypothesis, we evaluated the effects of four SNPs in pre-miRNAs (pre-miR-146a rs2910164, pre-miR-149 rs2292832, pre-miR-196a rs11614913, and pre-miR-499 rs3746444) on the survival outcomes of patients with early-stage non-small-cell lung cancer (NSCLC).</P>