• 대한간호학회지
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• 제21권3호
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• pp.383-395
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• 1991

This study was to investigated the factors influencing the decisions of nurses to resign. The purpose was to contribute information useful for the effective management of nurse staffing resources. The specific objectives were as follows : 1. To investigate the level of job satisfaction of nurses who resign. 2. To analyze the relationship of job expectations and the decisions to resign. 3. To investigate the major reason for nurses' resignations. 4. To identify the relationship of the general characteristics of the nurses and the factors influencing their decisions to resign. 5. To analyze the relationship of the intention to resign and the factors influencing the decisions to resign. The sample consisted of 90 nurses who worked at Y hospital in Seoul from march. 1987 to Feb. 1988 and who had resigned. The instruments used for this study were slavitt et al's Index of Work Satisfaction Scale and a job expectations scale developed by the researcher Analysis of data was done using frequency, t-test and ANOVA. The results of study were as follows : 1. There was no difference in the job satisfaction level of nurses who resigned compared with nurses in active service but the subcategory interaction score was lower and the subcategory salary score was higher than for nurses in active service. 2. Low job expectation scores influenced the decision to resign. 3. The major reason for resigning were personal problems such as marriage, childbirth, and relocation of family. 4. The length of employment and the number of different service areas of the nurses who resigned were associated with the job satisfaction level. 5. The nurses who had have an intention to resign while in active service had lower scores for job satisfaction and the job expectation score was a greater influence on the decision to resign. In conclusion, the factors influencing the decisions of nurse to resign were job satisfaction, job expectations and intention to resign while still in active service.

• Strategy21
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• 통권44호
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• pp.142-176
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• 2018

So far, the main threat to South Korea was North Korea. That is why South Korea established a strategy based on the threat of North Korea and most of the budget on defense was used to deter North Korea. Even though the neighboring countries(China, Japan, and Russia) are growing as a real threat with abilities and intentions based on their powerful naval forces, South Korea has not yet been able to establish a strategy that regards neighboring countries as a threat. But the decades-old structural mechanism of the Korean security environment is undergoing a radical change on April 27, 2018, through the South-North summit and the Panmunjom Declaration. Under the changing security environment, South Korea was placed in a complicated dilemma that had to deal with threats of two axes(China), three axes(China, Japan), and four axes(Japan, Russia). If the one axis threat(North Korea) is dominated by land threats, the second, third and fourth axis threats are threats from the sea. This paper analyzed the maritime strategy of Korea within the framework of maritime-geopolitics, in other words recognition and expansion of the sphere of maritime. I have designed that the maritime defense space that we can deny from threats is divided into three lines of defense: 1 line (radius 3,000km), 2 lines (2,000km), and 3 lines (1,000km). The three defense zones of the three lines were defined as an active defense(1 line), defensive offense(2 line), active offense(3 line). The three defense zones of the three lines were defined as the sphere of core maritime, As a power to deny the sphere of core maritime, it was analyzed as a maneuvering unit, a nuclear-powered submarine, the establishment of missile strategy, and the fortification of islands station. The marine strategy of South Korea with these concepts and means was defined as 'Offensive Maritime Denial Strategy'.

• Smart Structures and Systems
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• 제23권1호
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• pp.1-14
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• 2019

Control algorithms are the most important aspects in successful control of structures against earthquakes. In recent years, intelligent control methods rather than classical control methods have been more considered by researchers, due to some specific capabilities such as handling nonlinear and complex systems, adaptability, and robustness to errors and uncertainties. However, due to lack of learning ability of fuzzy controller, it is used in combination with a genetic algorithm, which in turn suffers from some problems like premature convergence around an incorrect target. Therefore in this research, the introduction and design of the Fuzzy Cooperative Coevolution (Fuzzy CoCo) controller and Adaptive Neural-Fuzzy Inference System (ANFIS) have been innovatively presented for semi-active seismic control. In this research, in order to improve the seismic behavior of structures, a semi-active control of building using Magneto Rheological (MR) damper is proposed to determine input voltage of Magneto Rheological (MR) dampers using ANFIS and Fuzzy CoCo. Genetic Algorithm (GA) is used to optimize the performance of controllers. In this paper, the design of controllers is based on the reduction of the Park-Ang damage index. In order to assess the effectiveness of the designed control system, its function is numerically studied on a 9-story benchmark building, and is compared to those of a Wavelet Neural Network (WNN), fuzzy logic controller optimized by genetic algorithm (GAFLC), Linear Quadratic Gaussian (LQG) and Clipped Optimal Control (COC) systems in terms of seismic performance. The results showed desirable performance of the ANFIS and Fuzzy CoCo controllers in considerably reducing the structure responses under different earthquakes; for instance ANFIS and Fuzzy CoCo controllers showed respectively 38 and 46% reductions in peak inter-story drift ($J_1$) compared to the LQG controller; 30 and 39% reductions in $J_1$ compared to the COC controller and 3 and 16% reductions in $J_1$ compared to the GAFLC controller. When compared to other controllers, one can conclude that Fuzzy CoCo controller performs better.

• The Plant Pathology Journal
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• 제38권5호
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• pp.461-471
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• 2022

Erwinia amylovora is a causative pathogen of fire blight disease, affecting apple, pear, and other rosaceous plants. Currently, management of fire blight relies on cultural and chemical practices, whereas it has been known that few biological resources exhibit disease control efficacy against the fire blight. In the current study, we found that an SFC20201208-M01 fungal isolate exhibits antibacterial activity against E. amylovora TS3128, and the isolate was identified as a Penicillium brasilianum based on the 𝛽-tubulin (BenA) gene sequence. To identify active compounds from the P. brasilianum culture, the culture filtrate was partitioned with ethyl acetate and n-butanol sequentially. From the ethyl acetate layer, we identified two new compounds (compounds 3-4) and two known compounds (compounds 1-2) based on spectroscopic analyses and comparison with literature data. Of these active compounds, penicillic acid (1) exhibited promising antibacterial activity against E. amylovora TS3128 with a minimal inhibitory concentration value of 25 ㎍/ml. When culture filtrate and penicillic acid (125 ㎍/ml) were applied onto Chinese pearleaf crab apple seedlings prior to inoculation of E. amylovora TS3128, the development of fire blight disease was effectively suppressed in the treated plants. Our results provide new insight into the biocontrol potential of P. brasilianum SFC20201208-M01 with an active ingredient to control fire blight.

• 정보관리학회지
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• 제20권4호통권50호
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• pp.277-301
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• 2003

기업의 경쟁력을 높이기 위해서는 지식과 지식의 창조, 공유, 활용 등을 포함하는 원천으로써 지식을 자산화 할 수 있는 지식관리가 중요하다. 이 연구는 개념적 연구결과와 지식관리유형에 따라 지식창조프로세스 관계에 대한 연구를 수행하였다. 특히 효율적인 지식관리의 길라잡이를 제시하였다는 데 그 의의가 있다. 또한 은행에 지식관리유형이 시스템중심접근방법과 사람중심 접근방법이 있으며 이를 4가지 지식변환의 모드에서 지식창조의 다양한 형태를 제공하였다. 이를 위해 이 연구는 일반적으로 기업현장에서 인용되고 발생되는 지식관리유형을 실증적으로 도출하였으며, 금융산업 중에서 은행과의 관계를 규명하기 위해, 실 사례를 통해 지식관리유형과 지식창조프로세스간의 관계를 조사하고 분석하였다 이 연구결과를 기반으로 지식창조프로세스 모형을 제시하였다.

• 한국기록관리학회지
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• 제18권2호
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• pp.109-133
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• 2018

행정정보 데이터세트의 기록관리 필요성은 기록관리 연구자들 사이에서 넓은 공감대를 형성하고 있으며 지속적으로 연구되어 왔다. 그동안 정보 기술의 발전에 따라 행정정보시스템의 신규 구축 및 재개발이 증가하고 있음에도 불구하고 실제 공공기관에서 운영 중인 각종 행정정보시스템에서 생산된 데이터세트는 관리하지 못 하고 있는 실정이다. 그 원인은 현실 적용이 가능한 관리 방안의 부재에 있다고 하겠다. 본 연구는 구현 가능한 행정정보 데이터세트 관리 방안은 데이터세트 관리 환경의 실상에 기초하여야 한다는 판단 하에, 현재 운영 중인 행정정보시스템에서의 데이터세트 생산 및 관리 환경 사례를 조사함으로써 관리 방안 개발의 기초 자료와 유사 연구에서 활용할 수 있는 조사방법론을 제시하고자 한다.

• 농업과학연구
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• 제28권2호
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• pp.147-161
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• 2001

Efficiency and competitive power in agribusiness management has became important issue due to the rapid changes in farming environment under new WTO agreement. To increase competitive power, small-sized petty farm should be restructured to be specialized large-scaled farming system. Trust farming corporation(TFC) has been introduced to increase farm productivity and competitive power through large scale farming system and refined management skills. Eventually, TFCs are expected to revitalize rural economy. TFCs are increasing in numbers, but they are unsatisfactory in quality often with insolvent operations. The typical problems with TFCs are internal conflicts among members, lack of management abilities and incentives, inefficiency in machinery use, and insolvent operations. The self effort by members and legal-institutional assistance can alleviate the negative factors against the rational for cooperative management and sustain TFCs. This study identifies the management problems of TFCs. To provide the methods for increasing management efficiency, improving rational management skills, and hence to help revitalizing the rural economy with competitive power, 20 TFCs in Nonsan County is surveyed. The major findings are as follows; 1) According to the survey result of 20 trust farming corporations, investments on the accumulation of knowledges and information, accounting management, machinery management are required due to the present lack of management/accounting ability. There also exist problems associated with revenue sources, labor uses, and public recognition. To increase management efficiency under current situation, corporations should import active business plans with expanding farming execution and off-farm season business. 2) Based on the result of corporations' business analysis, more than 50% of the corporations were not able to provide profit dividends to the members. It suggests that trust farming corporations need appropriate and stable revenue sources to sustain business. It is also required that corporations should reduce their excessive expenditure on fixed assets. 3) Theoretical amounts of consignment fees for tillage operation, planting, and harvesting were found to be 338,874 won, 216,596 won, and 332,318 won, respectively. Although actual levels of fee are 110%~120% of these theoretical levels of consignment fee, corporations' expected fee levels could not be acheived because of competency of consignment market.

• 한국정보과학회논문지:시스템및이론
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• 제35권6호
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• pp.293-303
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• 2008

컴퓨팅 환경이 무선과 휴대용 시스템으로 변화하면서, 전력효율이 점점 중요해지고 있다. 특히 내장형 시스템일 경우에 더욱 그러한데 이중 메모리에서 소모되는 전력이 전체 전력소모의 두 번째 큰 요소가 되고 있다. 메모리 시스템에서의 전력소모를 줄이기 위해서 SDRAM의 저전력 모드를 활용할 수 있다. RDRAM의 경우 냅모드(nap mode)는 액티브 모드(active mode)의 5%이하의 전력만을 소모한다. 하지만 하드웨어 컨트롤러는 운영체제가 협조하지 않으면 이 기능을 효율적으로 활용하지 못한다. 이 논문에서는 SDRAM의 액티브 유닛(active unit)의 수를 최소화하는 방법에 초점을 맞춘다. 운영체제는 참조되지 않는 메모리를 저전력 모드에 놓음으로써 최소한의 유닛들만을 액티브 모드에 놓은 상태로 프로그램이 수행될 수 있도록 피지컬(physical) 페이지들을 할당한다. 이것은 PAVM(Power Aware Virtual Memory) 연구의 일반화된 시스템 전반에 대한 연구라고 할 수 있다. 우리는 모든 피지컬 메모리를 고려하고 있으며, 특히 평균적으로 전체 메모리의 절반을 사용하는 버퍼 캐시를 고려하고 있다. 버퍼 캐시의 용량과 그 중요성 때문에 PAVM 방식은 버퍼 캐시를 고려하지 않고는 완전한 해법이 되지 못한다. 이 논문에서 우리는 메모리의 사용처를 분석하고 저전력 페이지 할당 정책을 제안한다. 특히 프로세스의 주소공간에 매핑(mapping)된 페이지들과 버퍼 캐시가 고려된다. 이 두 종류의 페이지들간의 상호작용과 그 관계를 분석하고 저전력을 위해 이러한 관계를 이용한다.

• 경영정보학연구
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• 제24권4호
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• pp.55-76
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• 2022

사람들은 SNS를 일상적으로 사용하고 있다. SNS를 사용함에 있어 사람들은 의도적이든 그렇지 않든 자신의 개인정보를 노출하고 있다. SNS은 사람들이 자주 볼 수 없는 사람들과 소통할 수 있게 하는 등 장점을 제공하긴 하지만, 어두운 면도 가지고 있다. SNS 사용자 중에 일부는 정보제공자의 동의없이 SNS상에 있는 개인정보를 도용하기도 해 사회적인 문제로 대두되고 있다. 본 논문은 SNS상의 개인정보 침해에 영향을 미치는 요인에 대한 연구이다. 본 논문에서 SNS상에서 개인정보 침해는 수동적과 능동적 침해로 나눈다. 수동적 침해는 정보제공자의 동의 없이 정보를 수집하는 것을 말하는 것이며 능동적 침해는 정보제공자의 동의없이 정보를 유포하는 행위를 말한다. 본 연구를 통해 낮은 윤리의식이 수동적 침해와 능동적 침해를 즐거움으로 생각하는 것에 긍정적으로 영향을 미친다는 결과를 도출했다. 또한 낮은 윤리의식을 가진 사람일수록 다른 사람의 개인정보를 수집하는 것에 호기심이 많다라는 결론도 도출했다. 본 연구는 낮은 윤리의식 이외에도 즐거움, 호기심, 개인정보 침해의 피해자로서의 경험과 가해자로서의 경험 그리고 타인의 개인정보를 수집하거나 유포할 수 있다는 자기효능감이 수동적 그리고 능동적 개인정보 침해에 미치는 영향을 설문 자료를 통해 조사하였다.

• Journal of Forest and Environmental Science
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• 제29권1호
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• pp.58-70
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• 2013

Iriai an Indigenous forest management system in Japan from the viewpoint of "common pool resources" was a success resilient institution and resulted with sustainable production system and environmental conservation. This study was conducted in Osawa of the Nagano prefecture through group discussions, field observations and an in-depth field survey. Osawa Property Ward Forest is managed under the concept very much similarly to traditional "Iriai". This study firstly examined the changes of collective forest management system in terms of awareness and interest in forest management; forest management activities; role of forest; and collection of forest products. Then it analyzed the current threats for collective forest management have been identified as: land abandonment due to loss of benefits and lack of active community participation; deterioration of forest environment particularly the micro-climate and aesthetic values; conflict with local government authorities restraining the use of money in property ward forest and conflict with outsiders on damping of the garbage. Community cantered forestry management rules; livelihood contribution; protection of environment; local initiatives for protection and economic activities are the prevailing opportunities for collective forest management. The main requirements for revitalization of collective forest management are explained as local reciprocity; imposition of community based forest rules; encouraging local innovations; and building partnerships with stakeholders. Collective forest management system addresses the limitations of conventional forestry models, which had invalidated traditional 'iriai' institutions, and key to restoring sustainable use of forest and environmental resources. Cross-institutional collaborations together with responsibilities of local communities would ensure the revitalization of forest resources.