• 한국병원경영학회지
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• 제7권1호
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• pp.64-87
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• 2002

The purpose of this study is aimed to grasp the factors, which may influence the harmonized organizational efficiency of the objects of hospital structure as well as its structural constituents of each departments of administration, nursing, and para-medical personnels, in order to provide basic data enable to contribute in the development of hospital. The survey data involved in the study was derived from 385 personnels working in 5 medium and small sized hospitals in Seoul area. The main finding of the study can be summarized as follows; 1. The organizational efficiency in accordance with the general characteristics of subjects in order of male, over 30 years of age, university graduates, long-term tenure and high position is higher, whereas, in as much as wage and well trained personnels in administration departments are higher, its organizational efficiency is higher in comparison with those of nursing and para-medical departments. 2. The organizational efficiency in accordance with satisfaction and the motive contributional factors is higher as much as the high satisfactory level in every departments in general. 3. The organizational efficiency in accordance with the factors of job characteristics is higher in as much as difficulty of the jobs is lesser, however there was not statically significance between administration and para-medical departments. In as much as the job circulation is intact, job standard level is higher and the more job responsibility the higher organizational efficiency, while the more workload and the more work feud resulted lower organizational efficiency. It was obvious that the higher professional expertise as well as the training and application level are improving the organizational efficiency. 4. The organizational efficiency in accordance with the factors of structural characteristics was higher in as much as the intercommunication was smooth and the structural formalization level are higher, however there was not statically significance between the participation level of decision making and the organizational efficiency. 5. In as much as higher educational level of over university graduates, management of organization and the job level are satisfied, the psychological motive contributional level is higher, while the lesser job difficulty, the smooth job performance, the higher level of professional expertise, the higher structural formalization level, the smooth intercommunication, have affected as major influence factors of the structural characteristics of organizational efficiency. 6. As the management of hospital organization, the job level and personal relation are satisfied or psychological motive is provided, especially when there are no difficult jobs or smooth job circulation and no job feud are prevailing, it was apparent that the organizational efficiency is improving accordingly. The nursing departments has high educational standard and is satisfied in the management and job level of hospital organization as there are no difficult jobs while the level of hospital's organizational formality is high and the intercommunication is smooth, which are improving the organizational efficiency. The para-medical departments is also satisfied the management and job level of hospital organization and it was apparent that the organizational efficiency is higher in as much as the level of job standardization is high and the intercommunication is smooth. As a result of this study, in order for improving the organizational efficiency of the medium and small sized hospitals, the management and job level as well as personal relation are preferably satisfied, whereas the level of job circulation, job responsibility, the expertise and formalization of organization, intercommunication and etc. should be satisfied, and, therefore, it is advisable to buildup discriminated organizational management and environment for different division on the basis above factors. Since this study is carried on several hospitals in Seoul area, there is a certain limit to generalize its result to all domestic hospitals, nevertheless the gallop poll was made by developing the questionnaires with reasonability and reliability. Especially, as the study was carried by analyzing the comparison of influence factors' difference of organizational efficiency in accordance with the divisional characteristics of the medium and small sized hospitals.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.38.2-38.2
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• 2010

Biomimetc is a new domain of learning that proposes a solution getting clues from nature. There seems to be a sign of this phenomenon in fields of Renewable Energy. Foe example, Wind power was imitate the whale's fin that was improve efficiency of generating energy. This study focused on the photovoltaic generation as the instance of applying biomimetic. Efficiency is the most important factor in field of Photovoltaic generation. When given solar cell taking the sun light, most important fields of the study are absorb more light and increase the quantity of generation. For improving efficiency, the solar cell were builded up textures of taking a pyramid form, such a surface structure taking a role for remaining the light. This effects do the role as increasing absorbing efficiency. Such phenomenon calls Light Trapping, locking up the light on the surface of solar cell for a long time. Light is a vital factor to plants in the nature. Plants grow up through the photosynthesis that absorbing light for growth and propagation. So, plants make a effort how can absorb more the light in poor surroundings. This study set up a goal that imitates the minute surface structure of plants and applies to the existing solar cells's surface structure, so it can improve the efficiency of absorbing light. We used Light Tools software analyzing geometrical optics to analyze efficiency about new designed textures on the computer. We made a comparison between existing textures and new designed textures. Consequently, new designed textures were advanced efficiency, absorbing rates of light increasing about 7 percent. In comparison with existing and new textures, advancing about 20 percent in the efficient aspect.

• 간호행정학회지
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• 제10권1호
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• pp.11-23
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• 2004

Purpose: The objective of this study was to collect the basic data for improving the quality of nursing education by identifying the teaching efficiency of the ordered clinical nursing education by preceptor which was accepted by Gachongil College since 2001. Method: The data was collected from 30 Sept to 20 Oct 2002. The subjects of this study were 240 nursing students, junior 2nd term trained by the preceptors and 137 preceptors of 12 hospitals located in Inchon, Gyong Ki-do, and Seoul. The scale for measuring the teaching effectiveness, developed by Kim Miae et al.(1998), was employed as a tool for me study. The data was analysed by SPSS using mean value(SD), and ANOVA. Results: Mean value of teaching efficiency of preceptors evaluated by me nursing students scored 3.68(maximum 5). For 5 causal factors classified en the teaching efficiency, the factor of "teaching method and evaluation" showed the highest score, but "available as resource person" get the lowest. Items showing high score en teaching efficiency were "overall effectiveness of teacher", "was able to work with staff in cooperative manner", but the item of was unclear in instructions given to me showed the lowest. The psychiatric ward get the highest score, but cardiac catheterization room showed the lowest. The hospital 10 showed the highest score, but the hospital 8 get the lowest. Conclusion: As the findings from this study, the ordered clinical nursing education by preceptor showed higher teaching efficiency than the conventional education. Thus, cooperative relationship between nursing colleges and hospitals shall be suggested for improving the quality of clinical nursing education, and ordered clinical nursing education system.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제11권8호
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• pp.259-268
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• 2022

데이터 양의 폭발적 증가에 따른 관리 효율성 제고를 위한 클라우드 서비스 활용이 일상으로 자리잡고 있는 현재, 데이터 프라이버시 보존을 위한 다양한 암호화 기법이 적용되고 있다. 클라우드 시스템의 방대한 컴퓨팅 자원에도 불구하고 다수 사용자로부터 아웃소싱된 데이터의 중복으로 인한 저장 효율성의 저하는 서비스 효율을 현저히 감소시키는 요인으로 작용하면서, 프라이버시가 보장된 암호문에 대한 데이터 중복제거에서의 효율성 향상을 위한 다양한 연구가 진행되고 있다. 본 연구에서는 최신 USENIX ATC에 발표된 Ren et al.의 신뢰실행환경을 활용한 암호문에 대한 중복제거의 효율성 개선을 위한 연구결과를 분석하고 서비스에 참여하는 키 관리 서버를 사용자에 통합함으로써 제3의 독립적인 키 관리 서버의 필요성을 제거하면서도 키 관리의 안정성 개선 방법을 제시한다. 실험을 통하여 제안 기법에서 약 30%의 통신 효율 개선 효과를 얻을 수 있음을 확인하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권9호
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• pp.4467-4486
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• 2016

Discrete cosine transform (DCT) based JPEG standard significantly improves the coding efficiency of image compression, but it is unacceptable event in serious blocking artifacts at low bit rate and low efficiency of high-definition image. In the light of all phase digital filtering theory, this paper proposes a novel transform based on discrete sine transform (DST), which is called all phase discrete sine biorthogonal transform (APDSBT). Applying APDSBT to JPEG scheme, the blocking artifacts are reduced significantly. The reconstructed image of APDSBT-JPEG is better than that of DCT-JPEG in terms of objective quality and subjective effect. For improving the efficiency of JPEG coding, the structure of JPEG is analyzed. We analyze key factors in design and evaluation of JPEG compression on the massive parallel graphics processing units (GPUs) using the compute unified device architecture (CUDA) programming model. Experimental results show that the maximum speedup ratio of parallel algorithm of APDSBT-JPEG can reach more than 100 times with a very low version GPU. Some new parallel strategies are illustrated in this paper for improving the performance of parallel algorithm. With the optimal strategy, the efficiency can be improved over 10%.

• 전기화학회지
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• 제10권2호
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• pp.73-81
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• 2007

This review article considered the electrochemical reduction of uranyl ions on a Pt surface. Specifically, we focussed on the improvement in its reduction current efficiency. First, this article briefly explained the fundamentals of the reduction of uranyl ($UO_2^{2+}$) ions on a Pt surface. Namely, they involved the electrochemical behaviour of uranium species, and electrochemical cell configurations for the reduction of $UO_2^{2+}$ ions. In addition, the effects of adsorbed hydrogen atoms were investigated on the reduction of $UO_2^{2+}$ ions. Finally, this article presented the methods for improving current efficiency of the reduction of $UO_2^{2+}$ ions on a Pt surface. Three different kinds of methods are introduced, which include electrochemical surface treatments of Pt electrode involving hydrogenation and anodisation, the use of catalyst poisons, and formation of thin mercury film on a Pt electrode. Moreover, this article provided some clues about how hydrogenation and catalyst poisons work on the reduction of $UO_2^{2+}$ ions.

• 한국시뮬레이션학회논문지
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• 제23권4호
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• pp.229-235
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• 2014

생산시스템의 시간과 비용 효율성을 개선하는 것은 경쟁 우위를 구축하고 경쟁적인 비즈니스 환경에서 수익성을 향상하는 중요한 수단 중 하나이다. 그 중에서도 CONWIP(constant work-in-process)과 DBR(drum-buffer-rope)방법은 생산 공정의 효율을 개선하는 데 널리 사용된다. 이 연구에서는 실제 단추 공장 생산 시스템의 시뮬레이션 모델을 개발했다. 연구 결과에 의하면, CONWIP과 DBR 생산시스템 모두 병목 공정의 대기 시간을 감소시키는 등 실제 생산시스템보다 나은 결과를 나타냈다. 시뮬레이션 모델 결과를 바탕으로 제안된 생산시스템을 적용함으로써, 실제의 제조 공정의 효율을 크게 향상시킬 수 있을 것으로 기대된다.

• 한국기계가공학회지
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• 제19권1호
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• pp.29-35
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• 2020

Car inspection systems are regularly carried out by the state to ensure the safety and emission status of cars, thereby improving the safety and quality of life by reducing fine dust and greenhouse gases that are the main culprits of vehicle defects and air pollution. These automobile inspections are largely divided into either regular or comprehensive inspections. This study analyzed the smoke measuring probes used in the lug - down 3 mode. In the previously issued paper "Improvement of Soot Probe Efficiency for Automotive Emission Measurement," an improved smoke measurement probe(B) improved on the problems that arise from the current smoke measurement probe (A). In this study, a technique that can improve the probe's inhalation efficiency over the improved (B) probes was applied to probes (C). Probe (C) involves a structure designed close to the center of the circumference of the exhaust pipe, and the suction efficiency was improved by adding a variable center unit.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제16권11호
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• pp.1066-1070
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• 2010

무선 네트워크 환경에서 단말기의 에너지 효율은 멀티미디어 스트리밍 서비스의 연속적인 이용을 위한 중요한 고려사항이다. 본 논문에서는 멀티미디어 스트리밍 서비스를 이용하는 무선 단말기의 에너지 효율을 향상시키기 위해서 IEEE 802.11e의 U-APSD(Unscheduled Automatic Power Save Delivery) 환경에서 동작하는 스트리밍 시스템인 BACASS(Buffer-Aware and Content-Aware Streaming System)를 제안하였다. BACASS는 SVC로 인코딩된 영상을 이용하는 네트워크 인지형 스트리밍 시스템을 기반으로, PSNR(Peak Signal to Noise Ratio)과 클라이언트 버퍼 정보를 이용해서 U-APSD의 DP(Doze Period)를 유도함으로써 에너지 효율을 향상 시킨다. 시뮬레이션 결과를 통해서 제안하는 BACASS가 단말기의 에너지 효율을 향상시킴을 보였다.

• Journal of Power Electronics
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• 제12권3호
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• pp.418-428
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• 2012

It is very important to improve the overall efficiency of systems with a source of power that has low-voltage high-current terminal characteristics such as fuel cells. A resonant converter is required for high efficiency systems. However, the peak value of the switches current is large in a resonant converter. This peak current requires a large number of switches and results in system failures. In this paper, an analysis and experiments of a resonant isolation push-pull converter are performed. A switching loss analysis is performed in order to compare losses between a resonant push pull converter and a hard switching push-pull converter. Specially, the conduction loss is studied based on the ratio between the resonant frequency and the switching frequency. In addition, a method for improving the efficiency is implemented with conventional HF insolation converters.