• 한국실내디자인학회논문집
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• 제26권6호
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• pp.71-80
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• 2017

The purpose of this study is identify the status of the ward of public hospital for integrated nursing care service. Integrated nursing care service has been expanding on a national scale from 2016 but most of public hospitals are currently unable to operate due to nursing shortage. In this study 8 wards of public hospital have been chosen and analyzed. The measure of space program and area distribution(patient area percentage, staff area percentage, circulation area percentage), nurses's walking distance(distance from ns to patient room, distance from ns to core) were calculated by depthmapX and autocad programs. The result of this study is as follows. Nurse's walking distance is more than 24m so the efficiency of nurse's patient care is reduced. The percentage of patient area in double-corridor is higher and the patient feels more comfortable but the Nurse's walking distance is longer and the accessibility is lowered. NS should be located in the center of the ward and close to the core but some wards are not composed of proper space-separation and flow of human trrafic is overlapped. This study may serve as basic research for the architectural plan for future integrated nursing care ward.

• Tuberculosis and Respiratory Diseases
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• 제40권6호
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• pp.669-676
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• 1993

연구배경 : 종양세포는 세포의 분열성장이 매우 왕성하므로 정상 세포에 비하여 세포분열 주기 중 S-Phase fraction(SPF)의 증가를 예상할 수 있다. 같은 종양증에서도 SPF가 높으면 종양의 성장이 훨씬 빠를 것으로 생각되며, 이러한 종양세포의 생물학적 특성을 이용하여 원발성 편평상피성 폐암 환자에서 SPF와 생존기간과의 관계를 연구하였다. 방법 : 1985년 9월 부터 1990년 3월 까지 원광의대 부속병원에서 원발성 편평상피성 폐암으로 진단받고나서, 수술, 방사선, 화학요법 등을 실시받지 않고 사망한 21례를 대상으로 하였다. SPF 분석방법은 paraffin에 보관된 병리조직을 처리하여 유식세포 분석법에 의한 DNA histogram으로서 분석하였다. 결과 : 1) 전 대상군의 평균 생존기간은 225(${\pm}162$)일 이었고, TNM 병기, PS scale이 진행할 수록 단축되는 양상이다. 2) 전 대상군의 평균 SPF는 23.4(${\pm}11.3$)% 이었으며, TNM 병기, PS scale 별로 구분하여 비교한 결과, TNM 병기, PS scale의 진행정도와 SPF는 관계가 없었다. 3) SPF 20%를 기준으로 한, high SPF 군과 low SPF 군의 평균 생존기간은 각각 153(${\pm}99$)일, 342(${\pm}180$)일 로서 유의한 차이가 있었다(p<0.01). high SPF군과 low SPF군을 TNM 병기, PS scale 별로 구분하여 비교하여도 역시 유의하게 high SPF군이 low SPF 군 보다 평균 생존기간이 짧았다. 결론 : 편평상피성 폐암 환자에서 종양세포의 SPF가 증가되어 있으면, 예후가 유의하게 좋지 않으며, SPF는 TNM 병기, PS scale과는 무관한 독립된 예후추정 인자로서의 임상적 이용이 가능하다고 생각된다.

• Journal of Korean Neurosurgical Society
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• 제67권5호
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• pp.541-549
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• 2024

Objective : Advancements in AVM surgical techniques for cerebral arteriovenous malformation (AVM) underscore its efficacy. Our research aims to showcase the positive outcomes of treating low-grade AVMs surgically, focusing on safety and effectiveness. Methods : We retrospectively reviewed 55 patients (36 males and 19 females; average age 37.4 years) with Spetzler-Martin (S-M) grade 1 and 2 AVMs who underwent surgical resection between January 2009 and December 2022. Results : In our study, 55 patients with S-M grade 1 and 2 AVMs underwent surgical resection, evenly divided between grades 1 (50.9%) and 2 (49.1%). Intracranial hemorrhage was the primary symptom in 74.5% of cases. Pre-operative Glasgow coma scale (GCS) scores revealed 69.1% of patients scored above 13, with 18% below 8. Successful resection was achieved in 87.3%. Postoperatively, 95.5% of ruptured and 90.9% of unruptured AVM patients showed lower or same modified Rankin scale scores. Poorer outcomes were significantly linked to lower GCS scores and intranidal/flow-related aneurysms through multivariate logistic regression. Postoperative seizures noted in nine patients, were exclusive to the ruptured AVM group. Conclusion : Our findings indicate surgical resection as a beneficial treatment for low-grade AVMs, yielding high cure rates and positive functional outcomes in both ruptured and unruptured cases. Preoperative GCS scores and the presence of associated aneurysms are predictive of postoperative functional status. Additionally, managing postoperative seizures effectively is key to enhancing prognosis.

• Wind and Structures
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• 제20권3호
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• pp.449-468
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• 2015

Current wind-resistance designs of large-scale indirect dry cooling towers (IDCTs) exclude an important factor: the influence of the ventilation rate for radiator shutter on wind loads on the outer surfaces of the tower shell. More seemingly overlooked aspects are the effects of various ventilation rates on the wind pressure distribution on the tower surfaces of two IDCTs, and the feature of the flow field around them. In order to investigate the effects of the radiator shutter ventilation rates on the aerodynamic interference between IDCTs, this paper established the numerical wind tunnel model based on the Computational Fluid Dynamic (CFD) technology, and analyzed the influences of various radiator shutter ventilation rates on the aerodynamic loads acting upon a single and two extra-large IDCTs during building, installation, and operation stages. Through the comparison with the results of physical wind tunnel test and different design codes, the results indicated that: the influence of the ventilation rate on the flow field and shape coefficients on the outer surface of a single IDCT is weak, and the curve of mean shape coefficients is close to the reference curve provided by the current design code. In a two-tower combination, the ventilation rate significantly affects the downwind surface of the front tower and the upwind surface of the back tower, and the larger positive pressure shifts down along the upwind surface of the back tower as the ventilation rate increases. The ventilation rate significantly influences the drag force coefficient of the back tower in a two-tower combination, the drag force coefficient increases with the ventilation rate and reaches the maximum in a building status of full ventilation, and the maximum drag coefficient is 11% greater than that with complete closure.

• 한국수자원학회논문집
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• 제51권8호
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• pp.713-727
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• 2018

본 연구는 국내 하천의 고유성을 반영할 수 있는 물리적 환경평가 체계를 개발하는 것이다. 하천유형 분류, 평가구간 선정, 평가 항목 및 지표에 대하여 종합적으로 요약하였다. 하천의 물리적 구조는 하천 유수력에 의한 반응의 결과이므로 하도경사, 하상재료의 입경 및 하도지형의 특성에 따라 하천을 3가지 유형으로 분류하였다. 평가구간은 각 하천 유형의 대표적인 특징인 step 또는 여울출현 간격, 사행도에 따라 저수로 폭의 10배와 25배 기준으로 선정하였다. 평가지표는 하도 안정성, 흐름 상태, 횡단면 형상, 하안 안정성, 하도개수 및 하천횡단구조물과 같은 공통지표와 유효 서식지, 하상 매몰도, 흐름의 다양성 및 step과 여울 출현빈도와 같은 하천 유형별 특성지표로 구성되어 있다. 적용성 검토를 위하여 개발된 평가체계를 9개의 하천에 적용하고 그 결과를 제시하였다.

• Nuclear Engineering and Technology
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• 제48권5호
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• pp.1083-1095
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• 2016

The design of Prototype Gen-IV Sodium-Cooled Fast Reactor (PGSFR) has been developed and the validation and verification (V&V) activities to demonstrate the system performance and safety are in progress. In this paper, the current status of test activities is described briefly and significant results are discussed. The large-scale sodium thermal-hydraulic test program, Sodium Test Loop for Safety Simulation and Assessment-1 (STELLA-1), produced satisfactory results, which were used for the computer codes V&V, and the performance test results of the model pump in sodiumshowed good agreement with those in water. The second phase of the STELLA program with the integral effect tests facility, STELLA-2, is in the detailed design stage of the design process. The sodium thermal-hydraulic experiment loop for finned-tube sodium-to-air heat exchanger performance test, the intermediate heat exchanger test facility, and the test facility for the reactor flow distribution are underway. Flow characteristics test in subchannels of a wire-wrapped rod bundle has been carried out for safety analysis in the core and the dynamic characteristic test of upper internal structure has been performed for the seismic analysis model for the PGSFR. The performance tests for control rod assemblies (CRAs) have been conducted for control rod drive mechanism driving parts and drop tests of the CRA under scram condition were performed. Finally, three types of inspection sensors under development for the safe operation of the PGSFR were explained with significant results.

• 한국전자거래학회지
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• 제23권3호
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• pp.159-171
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• 2018

국내에 수입되어 판매되는 해외식품 수입액은 매년 급증하는 추세이며, 원재료를 수입하여 가공하는 것을 포함하면 규모는 더 클 것으로 예상된다. 수입 농수산물 완제품에 대한 화물신고 시 원재료에 대한 원산지는 표기되나, 원재료에 대한 검사 정보는 아직 미흡한 편이다. 이에 농수산물 제품 구매 시 원재료 또는 제품에 남아 있는 방사능 존재 여부, 생산 이력 관리 등에 대한 우려가 커지고 있다. 국내 수입농수산물의 위해식품정보는 관리되고 있으나, 미생물, 잔류농약, 식품첨가물, 알레르기 성분 등 주로 글로벌 이슈가 되는 위해요소들이 대부분이다. 그러므로 원재료의 생산이력 및 검사정보의 체계적인 관리를 위해서는 전체 운송과정에서의 물류 주체들 간 관련 데이터의 공유와 활용도 제고를 위한 아키텍처, 비즈니스 모델 등에 대한 표준화가 필요하다고 판단된다. 이에 본 논문에서는 수입농수산물 운송 중 상태 추적을 위해 단계별 정보를 수집, 가공, 처리하기 위한 아키텍처를 설계하고, 비즈니스 프로세스 간에 발생하는 업무 흐름을 정의하였다. 또한 도출한 데이터 엘리먼트로 정보 모델을 정의하고 UBL 기반의 XML 스키마를 정의하였다. 제안한 표준 모델을 통해 물류 주체 간 정보 유통 및 공유가 용이할 것이며, 실시간 관리가 필요한 농수산물 운송에 대한 가시성, 신뢰성, 안전성 및 신선도 체계 수립이 가능할 것으로 기대한다.

• Journal of Korean Neurosurgical Society
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• 제65권6호
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• pp.816-824
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• 2022

Objective : Emergency superficial temporal artery to middle cerebral artery (STA-MCA) anastomosis in patients with large vessel occlusion who fails mechanical thrombectomy or does not become an indication due to over the time window can be done as an alternative for blood flow restoration. The authors planned this study to quantitatively measure the degree of improvement in cerebral perfusion flow using perfusion magnetic resonance imaging (MRI) after bypass surgery and to find out what factors are related to the outcome of the bypass surgery. Methods : For a total of 107 patients who underwent emergent STA-MCA bypass surgery with large vessel occlusion, the National Institute of Health stroke scale (NIHSS), modified Rankin score (mRS), infarction volume, and hypoperfusion area volume was calculated, the duration between symptom onset and reperfusion time, occlusion site and infarction type were analyzed. After emergency STA-MCA bypass, hypoperfusion area volume at post-operative 7 days was calculated and analyzed compared with pre-operative hypoperfusion area volume. The factors affecting the improvement of mRS were analyzed. The clinical status of patients who underwent emergency bypass was investigated by mRS and NIHSS before and after surgery, and changes in infarct volume, extent, degree of collateral circulation, and hypoperfusion area volume were measured using MRI and digital subtraction angiography (DSA). Results : The preoperative infarction volume was median 10 mL and the hypoperfusion area volume was median 101 mL. NIHSS was a median of 8 points, and the last normal to operation time was a median of 60.7 hours. STA patency was fair in 97.1% of patients at 6 months follow-up DSA and recanalization of the occluded vessel was confirmed at 26.5% of patients. Infarction volume significantly influenced the improvement of mRS (p=0.010) but preoperative hypoperfusion volume was not significantly influenced (p=0.192), and the infarction type showed marginal significance (p=0.0508). Preoperative NIHSS, initial mRS, occlusion vessel type, and last normal to operation time did not influence the improvement of mRS (p=0.272, 0.941, 0.354, and 0.391). Conclusion : In a patient who had an acute cerebral infarction due to large vessel occlusion with large ischemic penumbra but was unable to perform mechanical thrombectomy, STA-MCA bypass could be performed. By using time-to-peak images of perfusion MRI, it is possible to quickly and easily confirm that the brain tissue at risk is preserved and that the ischemic penumbra is recovered to a normal blood flow state.

• 한국환경농학회지
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• 제15권4호
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• pp.506-519
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• 1996

The water quality in the rural areas is degrading due to a variety of causes such as the increase of the urban sewage and industrial wastes, the disposal of solid wastes, the growth of livestock waste, the growth of leisure facilities, the establishment of agricultural industry estates and etc. The water pollutants are scarce while the effluent is increasing from wide scattered sources. The technology specifically designed for the rural wastes water treatment plant needs to be implemented with improvement of agricultural water quality. 1. An integrated management measures against water pollution sources. The prevention of water pollution is the best measures in the environmental pollution. Hence, the most effective measures needs to be against the sources. Small-scale water treatment plants needs to be constructed in each village in the rural areas. As for the industrial effluent, the effluent discharge needs to be strictly monitored. Government subsidy for the establishment of treatment plant for livestock wastes is necessary. 2. The establishment of national-wide network for agricultural water quality. The network for agricultural water quality have been operated to conserve the agricultural water quality, and to develop management policies by the assessment of water pollution in the rural areas. The results of agricultural water quality network indicates that the water quality is degrading not only around urban areas but also in the distant rural areas, and the water quality at the pumping stations and weirs is worse than that of reservoirs. 3. The legal, systematic, and technical approaches for the agricultural water quality management. The actions currently implemented for the improvement of agricultural water quality involve temporary measures such as the improvement of irrigation facilities. These contingency measures are not effective in the long-term, and sometimes bring secondary pollution. Therefore, integrated measures covering the whole water environment such as the flow, quality, river morphology, aquatic ecosystem, and the surrounding environment, need be invented and implemented. Besides, the legal, systematic, and technical frameworks for the management are not fully established so far. The technology for the treatment of rural water pollution should be refined afterwards, and the research for the development of rural waste water treatment plant should be carried out.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2023년도 학술발표회
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• pp.142-142
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• 2023

Humans inevitably and continuously produce wastewater in daily life worldwide. To decrease the degradation of river water bodies and aquatic ecosystem therein, humans have built systems at different scales to collect, drain, and treat household-produced wastewater. Particularly, municipal wastewater treatment plants (WWTPs) with centralized controls have played a key role in reducing loads of nutrients in domestic wastewater for the last few decades. Notwithstanding such contributions, impaired rivers regarding water quality and habitat integrity still exist at the whole river basin scale. It is highly attributable to the absence of dilution capacity of receiving streams and/or the accumulation of the pollutant loads along flow paths. To improve the perspective for individual WWTPs assessment, the first crucial step is to achieve systematic understanding on spatial distribution characteristics of all WWTPs together in a given river basin. By taking the initiative, our former study showed spatial hierarchical distributions of WWTPs in three large urbanized river basins in Germany. In this study, we uncover how municipal WWTPs in the contiguous United States are distributed along river networks in a give river basin. The extended spatial scope allows to deal with wide ranges in geomorphological attributes, hydro-climatic conditions, and socio-economic status. Furthermore, we identify the relation of the findings with multiple factors related to human activities, such as the spatial distribution of human settlements, the degree of economy development, and the fraction of communities served by WWTPs. Generalizable patterns found in this study are expected to contribute to establishing viable management plans for recent water-environmental challenges caused by WWTP-discharges to river water bodies.