• 한국군사과학기술학회지
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• 제13권5호
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• pp.852-860
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• 2010

An environment in which the software is operated become more complex and changed dynamically. Such software requires the ability to adapt in accordance with operating environments, by monitoring the changes of user requirements and operating environments. Especially, the mobile device used in military operation requires more dynamical adaptation than the mobile device in normal environment. In this paper, we propose MOSAIC architecture based on Self-Adaptive Software suitable for military mobile device and verify the results. The proposed architecture consists of context manager, evaluation manager and adaptation manager. We simulate the MOSAIC architecture by modelling PRE(Position Reporting Equipment) used in the army and verify four types of operational mode and dynamical reconfiguration of user interface.

• 디지털융복합연구
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• 제18권4호
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• pp.177-191
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• 2020

본 연구는 프랜차이즈 경영자의 사적 효용 동기에서 비롯된 자기과시적 성향이 기업의 원가행태에 어떠한 영향을 미치고 있는지를 검정하고자 하였다. 연구 문제를 해결하기 위해 국내 프랜차이즈 경영자의 자기과시적 성향에 대한 대용치를 개발하고 이들 특성 변수를 그룹화하여 그룹별 독립변수가 영업비용인 종속변수에 미치는 영향을 다중회귀모형을 이용하여 비교·분석하였다. 연구 결과, 프랜차이즈 경영자의 자기과시적 성향은 매출 감소 시 영업비용의 하방경직성을 강화시키게 되고, 자기과시적 성향이 커질수록 하방경직성은 더욱 강화되어 나타났다. 본 연구는 기존 연구에서 수행되지 않았던 프랜차이즈 경영자의 갑질 행위 등의 자기과시적 성향에 대한 대용치를 개발하여 향후 프랜차이즈 경영자에 대한 연구를 강화하고, 기업의 영업비용에 미치는 경영자의 자기과시적 속성의 영향을 확인함으로써 예비창업자, 가맹점주, 투자자 등의 프랜차이즈 이해관계자에게 유용한 정보를 제공할 것이다.

• 디지털융복합연구
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• 제18권2호
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• pp.447-453
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• 2020

본 연구는 동정맥루 및 혈관성형술 환자를 위한 정보제공프로그램을 개발하고 수술실 간호사가 제공하는 정보제공프로그램의 효과를 알아보기 위한 비동등성 대조군 전후설계를 이용하였다. 연구대상은 동정맥루나 혈관성형술을 위해 내원한 환자를 대상으로 실험군과 대조군 각각 40명을 편의표출 하였다. 정보제공프로그램은 수술당일, 수술 후 각각 1회기씩 총 2회기로 제공되며 수술에 대한 정보제공, 수술 후 통증관리, 투석혈관 관리, 응급상황 대처, 합병증 관리방법으로 구성되었다. 자료분석은 SPSS/WIN 21.0을 이용하여 사전 동질성 검증은 χ²-test 와 t-test, 실험군과 대조군간의 불안, 자기효능감에 대한 차이는 t-test를 이용하였다. 연구결과, 수술실 간호사의 정보제공프로그램을 제공 받은 실험군의 기질불안과 상태불안은 통계적으로 유의하게 감소하였고 자기효능감이 통계적으로 유의하게 증가하였다. 본 연구결과 수술실 간호사가 제공하는 정보제공프로그램이 동정맥루 및 혈관성형술 환자의 불안을 감소시키고 자기효능감을 증진시켜 말기 신질환자의 수술 후 자기 관리능력이 향상되어 투석로에 대한 합병증 예방과 자가간호 수준 향상에 기여할 것으로 사료된다.

• KIEE International Transactions on Power Engineering
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• 제3A권1호
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• pp.17-26
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• 2003

In this paper, the comparative steady-state operating performance analysis algorithms of the stand-alone single-phase self-excited induction generator (SEIG) is presented on the basis of the two nodal admittance approaches using the per-unit frequency in addition to a new state variable de-fined by the per-unit slip frequency. The main significant features of the proposed operating circuit analysis with the per-unit slip frequency as a state variable are that the fast effective solution could be achieved with the simple mathematical computation effort. The operating performance results in the simulation of the single-phase SEIG evaluated by using the per-unit slip frequency state variable are compared with those obtained by using the per-unit frequency state variable. The comparative operating performance results provide the close agreements between two steady-state analysis performance algorithms based on the electro-mechanical equivalent circuit of the single-phase SEIG. In addition to these, the single-phase static VAR compensator; SVC composed of the thyristor controlled reactor; TCR in parallel with the fixed excitation capacitor; FC and the thyristor switched capacitor; TSC is ap-plied to regulate the generated terminal voltage of the single-phase SEIG loaded by a variable inductive passive load. The fixed gain PI controller is employed to adjust the equivalent variable excitation capacitor capacitance of the single-phase SVC.

• International Journal of Naval Architecture and Ocean Engineering
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• 제4권3호
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• pp.302-312
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• 2012

Underwater vehicles play a very important role in underwater engineering. Water-tight junction box (WJB) is one of the key components in underwater vehicle. This paper puts forward a pressure self-adaptive water-tight junction box (PSAWJB) which improves the reliability of the WJB significantly by solving the sealing and pressure problems in conventional WJB design. By redundancy design method, the pressure self-adaptive equalizer (PSAE) is designed in such a way that it consists of a piston pressure-adaptive compensator (PPAC) and a titanium film pressure-adaptive compensator (TFPAC). According to hydro-mechanical simulations, the operating volume of the PSAE is more than or equal to 11.6 % of the volume of WJB liquid system. Furthermore, the required operating volume of the PSAE also increases as the gas content of oil, hydrostatic pressure or temperature difference increases. The reliability of the PSAWJB is proved by hyperbaric chamber tests.

• 한국식생활문화학회지
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• 제15권2호
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• pp.69-78
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• 2000

The purposes of this study were to : (a) investigate overall operating conditions of university residence hall foodservice, (b) compare them by the management systems. Questionnaires were hand delivered and mailed to 73 foodservice managers. A total of 56 were usable; resulting in 76.7% response rate. The survey was conducted between October, 1998 and May, 1999. Statistical data analysis was completed using the SAS/Win 6.12 for Descriptive Analysis, $x^2-test$. Sixty-four percent of the foodservice operations were 'self-operated'; 23% were 'contracted'; and 13% were 'rented'. Eighty-three percent of operations provided 'single menu'; forty-six percent of foodservice operations with 'partially self-service'; and forty-one percent with 'complete self-service'. Forty-four percent of overall foodservice operations provided 1,000-2,000 meals per day; thirty-one percent provided less than 1,000 meals per day, and twenty-four percent provided more than 2,000 meals per day. The highest meal price was 1,950 won and the lowest was 700 won with average of 1,295 won. The mean number of employees was 12.2; the number of working hours was 59.7 hours per week.

• 문화기술의 융합
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• 제6권2호
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• pp.357-367
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• 2020

본 연구는 간호대학생의 수술실 실습경험을 이해하고 설명하기 위해 수행된 질적 연구이다. 본 연구의 참여자는 경상북도 C군 일개 대학에 수술실 임상실습에 참여한 간호 대학생 3, 4학년 67명을 대상으로 하였다. 자료수집기간은 2019년 1월14일부터 2020년 1월 13일까지였으며, 자료 수집은 개방형 자기보고서식 성찰일지를 통해 이루어졌으며, 수집된 자료는 Krippendorff [21]의 내용분석 방법을 사용하여 분석하였다. 간호대학생의 수술실 실습 경험을 분석한 결과, 27개의 하위주제, 12개의 주제, 그리고 5개의 범주로 도출되었다. 5개의 범주는 '복잡한 심경에 휩싸임', '펼쳐진 인체와 직면함', '수술실의 특성을 터득함', ' 임상실습의 한계와 맞닦드림' '자기성찰''이다. 본 연구 결과는 간호대학생의 수술실 실습 경험에 대한 이해를 제공하였으며, 간호대학생의 임상실습의 질을 향상시킬 수 있는 기초 자료로 활용될 것이라고 기대한다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1422-1424
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• 2009

Modified self-assembled $TiO_2$ and polyelectrolyte multilayer film have been used as OTFT insulator. Both films were used as gate insulator and their thickness were reduced to the order of 10nm. The operating voltage of OTFT was substantially reduced due to nanoscale thickness of titanium oxide and polyelectrolyte multilayer. Pentacene-based OTFT characteristics will be discussed.

• Journal of Nutrition and Health
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• 제36권10호
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• pp.1083-1093
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• 2003

Efficient financial management is a critical factor in achieving school foodservice goals. The objective of this study was to suggest efficient financial management practices in secondary school foodservices. In pursuit of this objective, we first identified performance indexes for measuring the success of financial management. Second, we suggested financial management standards, financial data classification methods and a report system. Last, we analyzed operating ratios with the financial data of self-operated and contract-managed school food services. The data were collected through an open-ended questionnaire from 10 middle/high school foodservices in Seoul and Kyeonggi Provincial during on-sites visits and interviews with dieticians and managers. Student participation, sales goals, re-contract frequency and number and cost of disaster loss were identified as the performance indexes for financial management. Income statements were compiled by identifying and classifying financial data. Total revenues consisted of subsidies, meal sales, other revenue and interest. Expenditures consisted of purchased food, salaries and wages, utility costs, office supplies, kitchen supplies, purchased services, company overhead indirect costs, facility investment and maintenance, facility usage expenses, employee benefits and miscellaneous. Mean price of a meal was 2,326 won at self-operated foodservices when the subsidies were included as revenues and 2,360 won at contract-managed foodservices. When including the subsidies as revenues, the operating ratios of self-operated foodservice showed that the food cost percentage was 66.9％, labor cost 23.2％, operation cost 9.9％ and profit 0％. The correspond figures at contract-managed foodservices were 57.6％, 21.5％, 15.3％, and 5.5％, respectively. Food costs in self-operated foodservices was significantly higher than that for contract-managed foodservices, however, facility investment and maintenance and facility usage expenses at self-operated foodservices was significantly lower than those for contract-managed foodservices. Based on this study, the methodology and classification system of financial data was found to be applicable to assess the financial structure of school foodservices.

• 산업경영시스템학회지
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• 제32권3호
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• pp.71-77
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• 2009

Using the results of the expected busy periods for the dyadic Min(N, D) and Max(N, D) operating policies in a controllable M/G/1 queueing model, an important relation between them is derived. The derived relation represents the complementary property between two operating policies. This implies that it could be possible to obtained desired system characteristics for one of the two operating policies from the corresponding known system characteristics for the other policy. Then, upper and lower bounds of expected busy periods for both dyadic operating policies are also derived.