• 응용통계연구
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• 제17권2호
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• pp.253-267
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• 2004

임상시험중에는 소아암연구에서와 같이 환자 중의 상당수에서 사망 또는 재발이 오랜 기간 일어나지 않고 완치된 것으로 보이는 경우가 있다. 이 경우 연구자는 생존함수의 전반적인 비교보다는 치료율의 비교에 더 관심이 있을 것이다. 본고에서는 치료율의 비교를 위한 여러 모수적, 비모수적 방법들을 소개하고, 생존분포, 치료율, 중도절단을 등을 다양하게 설정한 모의실험을 통하여 각 방법들의 검정력과 유의수준을 비교하였다.

• 조명전기설비학회논문지
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• 제26권7호
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• pp.52-58
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• 2012

In this study, we have investigated the effect of the solar power generation facilities on the power quality of interconnected solar power generation system. When the solar power generation facility was connected to the distribution system, whether the solar power generation is under operation or not, Peak factor of current was increased to 0.033[%], Frequency is deviated from $60{\pm}0.2$[Hz] and also Short term flicker indication($P_{st}$) increased to 0.213[p.u.] compare with the disconnected situation. Harmonic current [%] in orders was 11.42[%] maximum under 11th orders and was 7.861[%] between 11th and 17th orders. These values were about 3 or 4 times compared with "the power system interconnection technique standards" at the same situation above. Therefore, we could confirmed that the solar power generation facility, when it was connected to the existing distribution system, made bad influence on the power qualities such as the peak factor of current, frequency regulation, short term flicker indication($P_{st}$) and harmonic current [%] in orders etc.

• 복식
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• 제27권
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• pp.207-217
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• 1996

The purpose of this study were to find ethnic fashion's background in the late period of 20th century to compare the World ethnic with the Korean ethnic through content analysis and to identify Korean ethnic of the world fashion Eth-nic fashion started at orientalism by Poiret in the 1910s advancing to African ethnic & Hippy fe-ver in 1960s-70-s have emerged variously with ecology in 1980s-90s' fashion trend. The next the present research analyzed the world ethnic and the Korean ethnnic. The identified 517 fashion photograph from fashion magazines were categorized into two areas: the trend of ex-ternal growth and ethnic fashion's origins/designers wearable situation colors fabrics/pattern. The result were as follows :First eth-nic fashion's external growth of both the World ethnic and the Korean ethnic were incresed. Sec-ond in the ethnic fasions' origins/designers while the World ethnic were almost the same rate between Asian and European ethnic by many designers the Korean ethnic were limited to Asian ethnic Third in the ethnic fashion's wearable situation while the World ethnic were variously wearing the Korean ethnic were lim-ited to work of collection. Forth in the ethnic fashion's colors the Korean ethnic were limited to white color. Last in the ethnic fashions' fabrics/patterns If the Korean ethnic would become a world of ethnic would become a world of ethnic fashion it should be deviced practival abrics and modernized patterns.

• The Journal of Asian Finance, Economics and Business
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• 제7권7호
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• pp.169-178
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• 2020

This study examines the current situation of responsibility accounting and proposed management solutions according to responsibility centers on public universities in Vietnam. The study applies quantitative research methods, and collected data through structured questionnaires to 138 public universities in Vietnam in 2019, receiving back 55 valid questionnaires. The data was cleaned and analyzed with SPSS software. The results show that most public universities in Vietnam assigned management responsibility to their departments, but responsibility accounting was not comprehensive since many universities are not financially autonomous. The Kruskal Wallis Test was conducted to compare the current situation of responsibility accounting among universities by the degree of autonomy and by geographic area. The research found out that totally autonomous universities assigned management responsibility to responsibility centers better than semi-autonomous and non-autonomous universities did. Regarding the evaluation of management responsibility, universities in Central Vietnam rated specific quantitative criteria, residual income (RI) and returns on investment (ROI) higher than universities in the North and the South of Vietnam did. However, universities in the South of Vietnam rated the evaluation of profits by department higher than the rest. The study also suggests structure for establishing responsibility centers in accordance with public universities in Vietnam.

• 보건행정학회지
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• 제18권3호
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• pp.128-146
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• 2008

Nonlinear pricing abounds in practice because it is a potentially powerful pricing method to explore consumer surplus. The various forms of nonlinear pricing are feasible within a given industry. In this context, it is important for manufacturers and retailers to understand which nonlinear pricing scheme is appropriate to apply in their specific situation and which nonlinear pricing schedule is the most profitable in their market situation. Although the merits of nonlinear pricing are well documented, the attempt to apply nonlinear pricing in medical service has been relatively rare. The researcher aims to try to full this gap by applying a practice-oriented simulation model to health examination data. We compare the sales volumes among nonlinear pricing scheme such as n-block tariff, two-part tariff, and uniform pricing. We found that n-block tariff outperforms two-part tariff and uniform pricing.

• Journal of the Korean Data and Information Science Society
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• 제12권2호
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• pp.103-111
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• 2001

과거 오랫동안 기업가나 팝슨(1979) 등의 학자들에 의해서 21세기의 가장 큰 산업이 될 것이라고 예측된 관광산업은 오늘날 단일산업으로는 세계 최대 규모이다. 관광분야에 대한 연구 중, 관광현상을 과학적이고 객관적으로 분석할 수 있는 방법론을 연구하고 제시하며 응용하는 분야로 관광조사분석론을 들 수 있다. 그런데 여기서 다루어지는 내용 중 관광수요와 마케팅분야가 핵심분야로 여겨진다. 오늘날 경제성장에 기인하여 해외관광은 급격한 성장을 보이고 있다. 이러한 상황에서, 관광마케팅을 위한 올바른 관광정책 수립에 필요한 해외관광 수요예측이 요구되는 바, 본 논문에서는 이러한 해외관광 수요예측을 위 한 중력모형과 회귀모형 에 대해서 비교해 보았다. 또한 중력모형을 이용한 수요 예측 시 우리실정에 맞는 여행유입요소를 제안하고, 이를 이용한 모형 비교분석을 실시해 보았다.

• 한국비블리아학회지
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• 제26권2호
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• pp.199-215
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• 2015

본 연구는 전국 공공도서관의 정보화 현황과 2012년과 2014년의 차이점 분석을 목적으로 하였다. 조사는 2012년과 2014년 인터넷을 통한 온라인 설문조사로 진행되었다. 조사 내용은 정보화 일반현황, 소프트웨어, 디지털자료실, RFID, 디지털 콘텐츠, 모바일 서비스, 통합서비스 현황에 관한 사항이 포함되었다. 조사 결과 파악된 문제점은 다음과 같다. 첫째, 정보화를 지역주민에 대한 전시적 효과에 치중하였다. 둘째, 정보화 담당인력이 부족하였다. 셋째, KOLAS의 문제점이 개선되지 않고 있다. 넷째, 디지털 도서관 서비스를 위한 준비가 미흡하다. 개선 방안으로 차세대 자료관리 소프트웨어의 개발, 모바일 앱과 웹 서비스 확산, 디지털 콘텐츠 확보 등을 제시하였다. 추후 연구 방향으로 이용자의 디지털 콘텐츠 및 기기 이용에 대한 연구를 제시하였다.

• 음성과학
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• 제9권2호
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• pp.109-132
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• 2002

The purpose of this study is to examine the focus realization of [Adjective+Noun] phrases which are used in English classroom situations. In order to examine this, two production and one perception experiments were designed. The noun phrases in the first two production experiments are divided into three patterns according to the location of focus. The difference between the two production experiments is that in the first experiment the focused words are contextually given in the classroom situation, but in the second experiment they are presented in written form. We compare the native English teachers' focus realization of noun phrases with that of Korean teachers from the point of view of intonational phonology. In the perception test, we examine how the uttered sentences are perceived by English native speakers and Korean native speakers. The results from the three experiments show that native English teachers' focus realization is quite consistent with informational structure. Also, there is a significant difference in pitch range of adjectives and nouns when the native speakers give pitch accents on the two content words, and the uttered sentences are mostly perceived as well as the speakers' intentions. As for Korean speakers, however, they usually focus only on the adjective or they focus on both the adjective and the noun, regardless of the relative informativeness of these words. From these findings, we can conclude that focus realization of Korean teachers is rather inconsistent with respect to informational structure when compared to that of native English teachers.

• 대한산업공학회지
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• 제42권3호
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• pp.173-181
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• 2016

This paper deals with the single-hoist and multiple-products scheduling problem. Although a mixed integer linear programming model for the problem was developed earlier, a branch-and-bound based heuristic algorithm is proposed in this paper to solve the big-size problems in real situation. The algorithm is capable of handling problems incorporating different product types, jobs in the process, and tank capacities. Using a small example problem the procedure of the heuristic algorithm is explained. To assess the performance of the heuristic we generate a bigger example problem and compare the results of the algorithm proposed in this paper with the optimal solutions derived from the mathematical model of earlier research. The comparison shows that the heuristic has very good performance and the computation time is sufficiently short to use the algorithm in real situation.

• 대한조선학회논문집
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• 제58권6호
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• pp.358-365
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• 2021

Crabbing motion is a pure sway motion with only sway velocity. The ship's crabbing motion is essential for an ideal berthing/unberthing process. The unberthing situation proceeds in sequential order such as crabbing motion section, pivoting section, and outer port section. For the berthing situation, the sequence has a reverse order: the inner port section, pivoting section, and crabbing motion section. In this paper, the berthing/unberthing data of the reference ship, Pukyong National University research ship "NARA", was analyzed to develop a sway velocity reference model. Several constraints were defined to derive the crabbing motion section during berthing/unberthing. The sway velocity reference model for the auto-berthing/unberthing was developed using the estimated sway velocity. A reproduction simulation of the ship was performed to compare the designed reference model and the reference ship data.