• Asia pacific journal of information systems
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• 제19권2호
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• pp.139-155
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• 2009

For the last few decades, many studies have tried to explore and unveil venture companies' success factors and unique features in order to identify the sources of such companies' competitive advantages over their rivals. Such venture companies have shown tendency to give high returns for investors generally making the best use of information technology. For this reason, many venture companies are keen on attracting avid investors' attention. Investors generally make their investment decisions by carefully examining the evaluation criteria of the alternatives. To them, credit rating information provided by international rating agencies, such as Standard and Poor's, Moody's and Fitch is crucial source as to such pivotal concerns as companies stability, growth, and risk status. But these types of information are generated only for the companies issuing corporate bonds, not venture companies. Therefore, this study proposes a method for evaluating venture businesses by presenting our recent empirical results using financial data of Korean venture companies listed on KOSDAQ in Korea exchange. In addition, this paper used multi-class SVM for the prediction of DEA-based efficiency rating for venture businesses, which was derived from our proposed method. Our approach sheds light on ways to locate efficient companies generating high level of profits. Above all, in determining effective ways to evaluate a venture firm's efficiency, it is important to understand the major contributing factors of such efficiency. Therefore, this paper is constructed on the basis of following two ideas to classify which companies are more efficient venture companies: i) making DEA based multi-class rating for sample companies and ii) developing multi-class SVM-based efficiency prediction model for classifying all companies. First, the Data Envelopment Analysis(DEA) is a non-parametric multiple input-output efficiency technique that measures the relative efficiency of decision making units(DMUs) using a linear programming based model. It is non-parametric because it requires no assumption on the shape or parameters of the underlying production function. DEA has been already widely applied for evaluating the relative efficiency of DMUs. Recently, a number of DEA based studies have evaluated the efficiency of various types of companies, such as internet companies and venture companies. It has been also applied to corporate credit ratings. In this study we utilized DEA for sorting venture companies by efficiency based ratings. The Support Vector Machine(SVM), on the other hand, is a popular technique for solving data classification problems. In this paper, we employed SVM to classify the efficiency ratings in IT venture companies according to the results of DEA. The SVM method was first developed by Vapnik (1995). As one of many machine learning techniques, SVM is based on a statistical theory. Thus far, the method has shown good performances especially in generalizing capacity in classification tasks, resulting in numerous applications in many areas of business, SVM is basically the algorithm that finds the maximum margin hyperplane, which is the maximum separation between classes. According to this method, support vectors are the closest to the maximum margin hyperplane. If it is impossible to classify, we can use the kernel function. In the case of nonlinear class boundaries, we can transform the inputs into a high-dimensional feature space, This is the original input space and is mapped into a high-dimensional dot-product space. Many studies applied SVM to the prediction of bankruptcy, the forecast a financial time series, and the problem of estimating credit rating, In this study we employed SVM for developing data mining-based efficiency prediction model. We used the Gaussian radial function as a kernel function of SVM. In multi-class SVM, we adopted one-against-one approach between binary classification method and two all-together methods, proposed by Weston and Watkins(1999) and Crammer and Singer(2000), respectively. In this research, we used corporate information of 154 companies listed on KOSDAQ market in Korea exchange. We obtained companies' financial information of 2005 from the KIS(Korea Information Service, Inc.). Using this data, we made multi-class rating with DEA efficiency and built multi-class prediction model based data mining. Among three manners of multi-classification, the hit ratio of the Weston and Watkins method is the best in the test data set. In multi classification problems as efficiency ratings of venture business, it is very useful for investors to know the class with errors, one class difference, when it is difficult to find out the accurate class in the actual market. So we presented accuracy results within 1-class errors, and the Weston and Watkins method showed 85.7% accuracy in our test samples. We conclude that the DEA based multi-class approach in venture business generates more information than the binary classification problem, notwithstanding its efficiency level. We believe this model can help investors in decision making as it provides a reliably tool to evaluate venture companies in the financial domain. For the future research, we perceive the need to enhance such areas as the variable selection process, the parameter selection of kernel function, the generalization, and the sample size of multi-class.

• 한국유통학회지:유통연구
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• 제16권2호
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• pp.95-118
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• 2011

본 연구는 다음과 같은 연구목적을 가진다. 첫째, 프랜차이즈 시스템에서 사회연결망 밀도와 중앙성이 가맹점의 가맹본부와의 정보공유와 다른 가맹점들과의 정보공유에 미치는 영향에 대한 관계를 실증적으로 밝히고자 한다. 둘째, 앞서 제시한 관계들에 있어 가맹점과 가맹본부 간의 유대강도의 조절역할을 하는지에 대하여 탐색적으로 확인하고자 한다. 셋째, 실증분석의 결과를 토대로 학문적 실무적 시사점을 제시하고자 한다. 본 연구는 실증분석을 하기 위하여 부산지역에 소재한 프랜차이즈 가맹점들을 대상으로 설문조사를 실시하였으며, 설문응답의 신뢰성을 높이기 위해서 가맹점의 점주와 점장을 중심으로 설문조사 하였다. 회수된 설문지는 총 200부이며, 이 중 무성의하게 응답한 11부를 제외한 189부를 실증분석에 사용하였다. 평균변환법과 위계적 다중회귀분석법을 사용하여 가설들을 검증한 결과는 다음과 같다. 첫째, 정보공유 대상이 가맹본부인 경우 사회연결망 중앙성, 유대강도, 밀도 및 중앙성과 유대강도의 상호작용이 정보공유에 유의하게 영향을 미치는 것으로 나타났다. 둘째, 정보공유 대상이 다른 가맹점인 경우 사회연결망 중앙성이 정보공유에 유의한 영향을 미치는 것으로 나타났다. 마지막으로 본 연구의 실증분석 결과를 토대로 학문적 실무적 시사점과 본 연구의 한계점 및 향후 과제를 제시하였다.

• 대한간호
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• 제28권3호
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• pp.68-82
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• 1989

This study was a quasi-experimental research study to test the characteristics of temperature regulation according to sponge bath methods of cold application. Thirteen volunteers were selected from among nursing college students according to an established criteria using a purposive sampling technique. Four different cold application methods were used: $\circled1$ tepid water sponge bath at $28^{\circ}C$, $\circled2$ 20% alcohol sponge bath at $28^{\circ}C$, $\circled3$ 40% alcohol sponge bath at $28^{\circ}C$ and $\circled4$ tepid water sponge bath at 28$^{\circ}$C plus an ice bag to the head. Changes in rectal temperature, mean skin temperature, mean body temperature, heat content change and thermal discomfort during the cold application were measured at 5 minute intervals over a 120 minute period. The data collection period was from Dec. 20, 1988 to Feb. 3, 1989. The data were analyzed using descriptive statistics, simple regression, ANOVA, Duncan's multiple range test and Pearson correlation coefficient using the SPSS-X Program. The results of the study are summarized as follows. Five general hypothesis were tested. Hypothesis 1 that "Change in heat content will be decreased for each cold application method according to the cold application time" was rejected. (tepid water sponge bath: after 10 minutes of cold application, 20% alcohol sponge bath: after 25 minutes of cold application: 40% alcohol sponge bath: after 45 minutes of cold application, tepid water sponge bath plus an ice bag to the head: after 80 minutes of cold application) Hypothesis 2 that "Thermal discomfort will be changed for each cold application method according to the cold application time" was rejected after 5minutes of cold application. Hypothesis 3 that "Change in heat content will differ among the cold application methods" was accepted except 0~5, 0~10, 0~65, 0~105 and 0~120 minute. This difference showed significance only between sponge bath methods and tepid water sponge bath plus an ice bag to the head. Hypothesis 4 that "Thermal discomfort will differ among the cold application methods" was accepted at 15, 20, 35, 45, 75, 80, 90, 95, 100, 105, 110, 115 and 120 minute of cold application time. This difference showed significance only between sponge bath methods and tepid water sponge bath plus an ice bag to the head. Hypothesis 5 that "The higher the change in heat content, the higher the thermal discomfort during the cold application time" was accepted for between 10~60 and 75 minute of cold application. In conclusion, this study showed that in sponge bath at $28^{\circ}C$, 10~80 minute was a effective cold application time in the view of heat loss through the skin. Concerning the effects of evaporation and thermal discomfort, it was found that there was no difference with regard to the solutions; tepid water sponge bath; 20% alcohol sponge bath or 40% alcohol sponge bath at a $28^{\circ}C$ controlled solution temperature. So it was thought that the type of solution itself did not have a big influence on the heat loss through skin. The combined effect of sponge bath with an ice bag to the head showed a significant difference and also showed a slight increase in thermal discomfort. On the basis of this research it can be concluded that cold application, for example, an ice bag to the head during a tepid water sponge bath is a good method as it increase heat loss through conduction, although fit can also cause a slight increase in thermal discomfort. The correlation between changes in heat content and thermal discomfort were not high. So factors other than change in heat content are considered to have an effect on the cognition of thermal discomfort.

• 벤처창업연구
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• 제10권5호
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• pp.137-150
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• 2015

본 연구에서는 창업자의 창업가정신, 창업역량이 창업만족도에 미치는 영향과 플로우(Flow)경험의 조절효과 여부에 대하여 탐구하였다. 이는 정부나 지자체, 공공기관 등에서 주관하는 창업지원사업 선정자중 교육 및 자금지원, 멘토링과 컨설텅 등의 수혜를 받았음에도 불구하고 실제 창업후 창업자별 창업만족도에는 차이가 있음을 실증적으로 규명하고자 하는데 그 목적이 있다. 본 연구의 목적을 위해서 정부의 창업지원사업 수혜자중 창업 5년 미만의 기창업자 320명을 대상으로 설문지를 통한 자료를 수집하였다. 창업가정신 변수로는 혁신성, 진취성, 위험감수성의 세 요인을 검토하였으며 창업역량 변수로는 네트워크 역량, 시장지향성, 마케팅역량의 세 요인을 검토하였다. 수집된 자료는 인구통계학적 특성을 통제변인으로 하는 다중회귀분석을 실시하였고 플로우 경험의 조절효과는 조절회귀분석으로 분석하였다. 분석결과 창업가정신의 혁신성, 진취성, 위험감수성이 창업만족도에 정의 영향을 미치는 것으로 나타났으며 창업역량의 네트워크역량, 시장지향성, 마케팅역량이 창업만족도에 정의 영향을 미치고 있었다. 플로우 경험의 조절효과 분석 결과 창업가정신, 창업역량과 창업만족도간에 정의 조절효과가 있는 것으로 나타났다. 이러한 연구결과는 창업자를 대상으로 한 창업지원사업에서 선정기준인 창업자의 창업가정신, 창업역량 평가항목이 유효하며 창업지원항목인 교육, 자금, 컨설팅도 중요하지만 창업 이후 과정에서는 창업자 스스로가 플로우 경험을 가질 수 있도록 창업생태계 조성과 네트워킹 지원 강화 등 변화가 필요하다는 결론을 도출하였다.

• Journal of Nutrition and Health
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• 제50권4호
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• pp.313-324
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• 2017

본 연구는 한국 성인의 항산화 비타민 섭취량과 대사증후군의 관련성을 분석하고자 하였다. 이를 위해 한국 성인 614명의 3일치 식사조사 자료를 한국인 상용식품의 항산화 비타민 함량 데이터베이스와 연계하여 항산화 비타민(비타민 A (${\mu}g$ RE, ${\mu}g$ RAE), 레티놀, 카로티노이드, 비타민 C, 비타민 E)의 섭취량을 추정하였다. 항산화 비타민 섭취밀도에 따라 대상자를 3분위로 나누어 대사증후군 및 그 위험요인의 오즈비를 계산한 결과, 남성에서 레티놀, 카로티노이드, 비타민 E의 섭취밀도가 높은 그룹의 대사증후군 유병률이 섭취밀도가 낮은 그룹보다 낮았으며, 여성 대상자에서도 레티놀의 섭취 밀도가 낮은 그룹보다 중간 및 높은 그룹의 대사증후군 유병률이 낮았다. 또한 남성 대상자에서 비타민 A, 카로티노이드, 비타민 E의 섭취밀도가 높은 그룹의 고혈당의 오즈비가 섭취밀도가 낮은 그룹보다 유의하게 낮았고, 여성 대상자에서는 비타민 A (${\mu}g$ RE)의 섭취밀도가 높은 그룹의 복부비만 오즈비가 섭취밀도가 낮은 그룹보다 유의하게 낮았다. 이상의 결과에서 한국 성인에게서 항산화 비타민 섭취량과 대사증후군 사이에 유의한 관련성이 있음을 확인할 수 있었다. 추후 항산화 비타민 섭취량과 대사증후군의 관련성에 대한 대규모 전향적 연구 또는 개입연구가 실시되어 인과관계를 더욱 명확히 파악하게 된다면, 대사증후군 관리 및 예방을 위한 식생활 관련 정책 수립의 과학적 근거를 제공하는데 도움이 될 것이다.

• 농약과학회지
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• 제16권3호
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• pp.242-256
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• 2012

QuEChERS(Quick, Easy, Cheap, Effective, Rugged and Safe)분석법은 고체상의 분말을 시료에 직접 주입하여 농약성분을 추출하는 방법으로 분석법이 간단하고 빠르기 때문에 많이 연구되고 있다. 이 방법은 기존 분석법에 비하여 적은 시료량과 상대적으로 많은 불순물을 포함하고 있기 때문에 LC-MS/MS 등의 감도가 높은 분석기기를 필요로 하며, HPLC나 GC 분석을 위해서는 개선이 필요하다. 본 연구에서는 QuEChERS AOAC Official 2007.01 법을 개선하여 사과, 포도, 배, 단감 4가지 과일을 대상으로 UPLC-PDA, GC-${\mu}ECD$ 및 GC-NPD 을 이용하기 위한 QuEChERS 분석법을 개발하고자 하였으며 그 결과를 QuEChERS AOAC Official 2007. 01법을 적용한 LC-MS/MS 분석결과와 비교하였다. QuEChERS AOAC Official 2007. 01법을 이용한 네가지 과일별 회수율은 각각 사과 71.1~104%, 포도 75.7~132.2%, 배 84.8~108.7%, 감 78.3~127.4%이었으며, 개선된 QuEChERS법을 이용한 네가지 작물별 회수율은 각각 사과 70.9~112.9%, 포도 71.3~101, 배 71.3~126%, 감 76.4~122.5% 이었으며, 두 방법 모두 다성분 분석법의 회수율 기준인 70~130%이내 조건을 만족하였다. 대부분의 농약이 변형한 방법으로 실험을 수행하였을 때 좋은 회수율이 보이므로 ECD, NPD 및 UVD와 같이 현재 분석기관에서 많이 보급된 분석 장비로 사용하여 다성분 동시분석이 가능할 것으로 판단되었다.

• 대한방사선기술학회지:방사선기술과학
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• 제32권3호
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• pp.285-291
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• 2009

본 연구의 목적은 대사증후군(MetS) 진단지표와 경동맥 내-중막 두께(carotid IMT)의 관련성을 이해하기 위하여 수행하였다. 연구대상자는 동맥경화와 기타 심혈관계 질환이 없는 남성 근로자 315명으로 하였다. 이 연구는 한국산업안전보건공단 산업안전보건연구원의 생명윤리위원회의 승인을 받은 후, 연구대상자의 동의를 받고 수행하였다. 인체계측과 혈청생화학 항목에 대한 검사는 체성분분석기기와 생화학자동분석 기기를 이용하여 측정하였고, MetS의 진단은 NCEP-ATP III 기준에 의하여 판단하였다. Carotid IMT는 고해상도 B-mode 초음파기기를 이용하여 경동맥 분지점과 근위부의 내-중막 두께를 측정하였다. Carotid IMT는 $0.739{\pm}0.137\;mm$이었고 연령증가와 더불어 유의하게 증가되었다. 또한 수축기 및 이완기혈압, 중성지방 및 공복혈당도 연령증가에 따라 유의한 증가를 보였다. Carotid IMT는 BMI(r = 0.170, p = 0.004), 수축기(r = 0.148, p = 0.011)와 이완기혈압(r = 0.123, p = 0.036) 및 HDL-cholesterol(r = -0.164, p = 0.005)과 통계적으로 유의한 상관성을 보였다. MetS 진단지표와 carotid IMT에 대한 다중 로지스틱 회귀분석을 실시한 결과, carotid IMT는 혈압(교차비 = 4.220, p < 0.01)과 MetS(교차비 = 1.301, p < 0.05)과 유의한 관련성을 보였다. 이상의 결과는 혈압과 대사증후군이 죽상동맥경화증의 중요한 위험인자로 작용함을 보여주는 결과라 판단된다.

• Asia pacific journal of information systems
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• 제18권1호
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• pp.1-23
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• 2008

As managing customer relationship gets more important, companies are strengthening information service using multi-channels to their customers as a part of their customer relationship management (CRM) initiatives. It means companies are now accepting such information services not as simple information -delivering tools, but as strategic initiatives for acquiring and maintaining customer loyalty. In this paper, we attempt to validate whether or not such various information services would impact on organizational performance in terms of CRM strategy. More specifically, our research objective is to answer the next three questions: first, how to construct the instruments to measure not information quality but information service quality?; second, which attributes of information service quality can influence corporate image and customer loyalty?; finally, does each information service type have unique characteristics compared with others in terms of influencing corporate image and customer loyalty? With respect to providing answers to those questions, the previous studies had been limited in that those studies failed to consider the variety of types of information service or restricted the quality of information service to information quality. An appropriate research model answering the above questions should consider the fact that most companies are utilizing multi channels for their information services, and include the recent strategic information service such as customer online community. Moreover, since corporate information service could be regarded as a type of products or services delivered to customer, it is necessary to adopt the criteria for assessing customer's perceived value when to measure the quality of information service. Therefore, considering both multi-channels and multi-traits may enable us to tell the detailed causal routes showing which quality attributes of which information service would affect corporate image and customer loyalty. As information service channels, we include not only homepage and DM (direct mail), which are the most frequently applied information service channels, but also online community, which is getting more strategic importance in recent years. With respect to information service quality, we abstract information quality, convenience of information service, and timeliness of information service through a wide range of relevant literature reviews. As our dependant variables, we consider corporate image and customer loyalty that both of them are the critical determinants of organizational performance, and also attempt to grasp the relationship between the two constructs. We conducted a huge online survey at the homepage of one of representative dairy companies in Korea, and gathered 367 valid samples from 407 customers. The reliability and validity of our measurements were tested by using Cronbach's alpha coefficient and principal factor analysis respectively, and seven hypotheses were tested through performing correlation test and multiple regression analysis. The results from data analysis demonstrated that timeliness and convenience of homepage have positive effects on both corporate image and customer loyalty. In terms of DM, its' information quality was represented to influence both corporate image and customer loyalty, but we found its' convenience have a positive effect only on corporate image. With respect to online community, we found its timeliness contribute significantly both to corporate image and customer loyalty. Finally, as we expected, corporate image was revealed to provide a great influence to customer loyalty. This paper provides several academic and practical implications. Firstly, we think our research reinforces CRM literatures by developing the instruments for measuring information service quality. The previous relevant studies have mainly depended on the measurements of information quality or service quality which were developed independently. Secondly, the fact that we conducted our research in a real situation may enable academics and practitioners to understand the effects of information services more clearly. Finally, since our study involved three different types of information service which are most frequently applied in recent years, the results from our study might provide operational guidelines to the companies that are delivering their customers information by multi-channel. In other words, since we found that, in terms of customer loyalty, the key areas would be different from each other according to the types of information services, our analysis would help to make decisions such as selecting strengthening points or allocating resources by information service channels.

• 한국식품위생안전성학회지
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• 제32권4호
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• pp.290-297
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• 2017

본 연구는 2017년 수입식품 중 신규 기준설정 예정 농약인 tridemorph의 안전성 관리를 위한 공정시험법을 확립하기 위하여 수행하였다. Tridemorph의 잔류물의 정의는 모화합물로 규정하며, 확립된 시험법은 실험실내 및 실험실간 검증을 통해 공정시험법으로의 유효성을 확인하였다. 대표 농산물 5종(감귤, 감자, 고추, 대두, 현미)에 대하여 잔류분석이 가능하도록 선택성과 감도가 우수한 LC-MS/MS를 사용하여 수용성 유기용매인 ACN로 추출 후 $NH_2$ 카트리지에 가장 회수율이 우수한 용매인 MeOH/DCM (1/99, v/v)를 정제조건으로 확립하여 시험법을 개발하였다. 개발된 tridemorph의 직선성은 결정계수($r^2$)가 0.99 이상으로 우수하였으며, 검출한계 및 정량한계는 각각 0.001 및 0.005 mg/kg으로 높은 감도를 나타내었다. 개발된 시험법의 평균 회수율은 75.9~103.7%였으며, 분석오차는 8.5%이하로 정확성 및 재현성이 우수함을 확인할 수 있었다. 또한, 외부기관 검증 결과 평균 회수율은 87.0~109.2%이었으며, 상대표준편차는 모두 7.8% 이하로 조사되어 국제적 잔류농약 분석 가이드라인 및 식품의약품안전평가원 가이드라인에 적합한 수준임을 확인하였다. 따라서 본 시험법은 농산물 중 tridemorph의 잔류검사를 위한 공정시험법으로 활용할 수 있을 것으로 판단된다.

• 가정간호학회지
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• 제7권1호
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• pp.58-72
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• 2000

This study was an attempt to encourage the development of a rehabilitation delivery system and programs as a substitute service for hospitalization on the case of car accident patients, such as hospital based home health care nursing services. Various substitute services for hospitalization are required to curtail the length of stay for inpatients who were hospitalized with car accident compensation insurance. It focused on developing an estimation an early discharge day for car accident inpatients based on detailed statements of treatment for 111 inpatients who were hospitalized at the General Hospital in 1997. This study had four specific purposes as follows. First. to find out the utilization of medical services. Second, to estimate the time of early discharge and income increasing effect based on early discharge for those patients. Third, to identify the factors affecting total medical expenditure and the length of stay for those inpatients. Forth, to figure out the need of utilizing home health care nursing service for accident patients. In order to analyze the length of stay and medical expenditure for inpatients who were hospitalized due to car accidents, the authors conducted micro- and macro-analysis of medical and medical expenditure records. Micro-analysis was done by nominal group discussion of 4 expertise with the critical criteria, such as a decrease in the amount of treatment after surgery, treatments, tests, drugs and changes in the test consistency, drug methods, vital signs, start of ROM exercise, doctor's order, patient's outside visiting ability, and stable conditions. In addition to identifying variables affecting medical expenditure, and the length of stay and income effect due to early discharge day, the data was analyzed with a multiple regression analysis and linear regression analysis model by SPSS-PC for windows and Excell program. Results of this study were as follows. First. the mean length of stay was 50.3 days. whereas the mean length of stay due to early discharge was 34.3 days at the hospital. The estimation of time of early discharge depended on the length of stay. The longer the length of stay, the longer the length of time of early discharge : for instance a length of stay under 10 days was estimated as correlating to a mean length of stay of 6.6 days and early discharge of 6.5. The mean length of stay was 217.4 days and the time of early discharge was 110.1 respectively. The mean medical expenditure per day was found to be 169.085 Won and the mean medical expenditure per day showed negative linear trends according to the length of stay at the hospital. The estimation results of the income effect due to being discharged 16 days early was around 2,244,000 won per bed. However. this sum does not represent the real benefits resulting from early discharge, but rather the income increasing amount without considering medical prime cost in the general hospital. Therefore, further analysis is required on the cost containments and benefits as turn over rate per bed as the medical prime costs. The length of stay was most significant and was positive to the total medical expenditure, as expected. Surgery and patient's residential area was also an important variable in explaining medical expenditure. The level of complications was the most significant variable in explaining the length of stay. There was a high level for need a home health care nursing service which further supports early discharge for accident patients. In addition, when the patient was discharged. they needed follow up care for complications suffered during the car accident. $86.8\%$ of discharged patients responded that they needed home health services after early discharge. From these research findings, the following suggestions have been drawn. Strategies on a health care delivery system must be developed in order to focus on the consumer's needs and being planned for 21 century health policy in Korea. Community based intermediate facilities or home health care should be developed for rehabilitation services as a substitute for hospitalization in order to shorten the length of stay would be. A hospital based home health care nursing service. it would be available immediately to utilize by patients who want rehabilitation services as a substitute for hospitalization with the cooperation of car insurance companies.