• Journal of Korean Neurosurgical Society
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• 제48권6호
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• pp.518-523
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• 2010

Objective : Chronic subdural hematoma (CSDH) is known to have a significant recurrence rate. There are different criteria defining the recurrence of CSDH. We evaluated the postoperative course of CSDH and tried to propose the reasonable criteria of recurrence. Methods : We retrospectively examined the medical records and pre- and postoperative CT scans of 149 consecutive patients who underwent surgery from January 2005 to December 2009. Diagnosis was confirmed by CT scanning or MRI. The postoperative courses were either resolved or recurrent. The resolved CSDH was one of the three types; early resolution, delayed resolution, or late resolution. The recurrent CSDH was one of the four types; recurrence without resolution, early recurrence after resolution, late recurrence after resolution, or recurrent-and-resolved type. Results : The CSDH was resolved within 30 days after surgery in 58 (39%) patients, between 1 to 3 months in 62 (42%), and after 3 months in 11 (7%) patients. The CSDH was recurred in 18 (12%) patients. Late resolution or recurrence was more common in the aged. The recurrent hematoma was seen on the same side in 11 patients, on the different side in 7 patients. Recurrence was significantly more common in the thick hematomas. Conclusion : For a working criteria of the recurrence of CSDH, we propose the early recurrence as return of symptoms or reaccumulation of the hematoma after a surgery within 3 months regardless of the location, amount or repeated operations. The late recurrence can be defined as reappearance or enlargement of a liquefied hematoma within the cranial cavity surrounded by the membranes or persistent CSDH beyond 3 months after surgery.

• 농업과학연구
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• 제34권1호
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• pp.85-97
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• 2007

This study aimed at analyzing the economic effect of outdoor swimming pool investment using the reservoir's amenity resources. We focused on the identification of the amenity value of reservoir in the rural area and the economic evaluation for establishing This study aimed at analyzing the economic effect of outdoor swimming pool investment using the reservoir's amenity resources. We focused on the identification of the amenity value of reservoir in the rural area and the economic evaluation for establishing infrastructure such as swimming pool based on the reservoir's landscape value. To this end, we have conducted the case study on the outdoor swimming pool in connection with Go-Bok reservoir in Yeon-Gi county, Chungnam Province and estimated its income effect on the rural community by cost-benefit analysis method. The research results are as follows; 1) Outdoor swimming pool participants, with 11,581 visitors totaled to Yeon-gi county every year, was estimated to spend the worth of 58,446 thousand won paid for the agricultural product purchase and etc. 2) Internal rate return of the outdoor swimming pool project was estimated to 16.19%, which considered to be economically feasible comparing with 10% of current capital opportunity cost. Based on the results of this study, we suggest the following strategies for development of amenity value of swimming pool in connected with the reservoir; 1) Reservoir amenities should be well preserved even after construction of swimming pool lest losing amenity values while managing the facilities. 2) Measures to increase the marketing value of intangible reservoir's amenities through promotion should be established. 3) Effective program for more visitors with longer staying and more agricultural products sales should be designed.

• 경영과정보연구
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• 제29권3호
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• pp.1-21
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• 2010

본 연구의 목적은 (1) e-Business의 안전성에 영향을 미치는 요인을 도출하고, (2) 도출한 요인의 타당성을 검증하기 위하여 기업의 성과와의 연관성을 검토하는데 있다. 기업의 성과는 전통적으로 학계에서 사용되어 왔던 회계적인 측정치인 자산수익률 (ROA: Return on Assets)과 최근 대안으로 부각되고 있는 마케팅적인 측정치인 Tobin's q를 모두 사용하여, 기업의 성과를 보다 정확하게 측정하고자 한다. 문헌연구를 통하여 도출된 9개 성공요인과 요인의 구성항목을 1단계 패널평가를 통하여 그 타당성과 정확성을 검토하여 설문지를 개발한 후, 수도권 e-Business 업체 담당중역이나 관리자에게 설문을 배포하였는데, 최종응답율은 72.6% (n = 212)였다. 설문분석 결과, 응답자들은 정보관리(INFO MGT)를 e-Business의 안전성에 가장 큰 영향을 미치는 요인으로 평가하였다. 이어서 대금 결제(PAYMENT), 보안프로그램 (PROGRAMS), 침범 (INTRUSION) 순으로 영향력을 평가하였다. 정부정책 (GOVT POLICY)은 9가지 요인 중 가장 낮게 평가되었다. 각 요인이 기업의 성과에 미치는 영향을 파악하기 위하여 회귀분석을 실시하였는데, e-Business의 안전성에 영향을 미치는 요인들이 기업의 성과에 대하여 설명력이 높은 것으로 나타나, 본 연구에서 도출한 e-Business의 안전성에 영향을 미치는 요인들이 상당한 설득력을 가지고 있는 것으로 검증되었다. 응답자들은 Tobin's q의 경우 정보관리(INFO MGT), 배송(DELIVERY), 침범(INTRUSION) 이 그리고 ROA의 경우 정부 정책(GOVT POLICY), 인식(AWARENESS), 배송(DELIVERY), 그리고 침범(INTRUSION) 이 통계적으로 유의하게 설명력을 갖는 요인들로 파악되었다.

• 상하수도학회지
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• 제27권3호
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• pp.299-312
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• 2013

This study investigated the contaminant loading and characteristics of particle size distributions(PSDs) in the rainfall runoff from two different sources, the pavement road and the ancillary parking lot, and then evaluated four different types of filter media(i.e., EPP, EPS, Zeolite, and Perlite) to treat runoff water. The results showed that runoff from the pavement road contains 5.6 and 20 times higher SS and Pb concentrations, respectively, than that from the parking lot. The particles smaller than $100{\mu}m$ occupied 89.8 % of runoff from the pavement road and 81.4 % of that from the parking lot by volume. The effect of the hydraulic loading, at 950 m/day filtering linar velocity and 40 cm head loss, was largest for Zeolite, followed by Perlite, EPS, and EPP. The return period of tested media calculated by the regression equation for head loss indicated that EPP has the longest life time. The average SS removal rate was similar for all media at between 84.9 % and 89 %, while the effect of various filter column heights was different, showing minimal for EPP and maximum for EPS. All filter media tested demonstrated over 95 % of SS treatment efficiency for the particles bigger than $100{\mu}m$, while for the ones smaller than $100{\mu}m$ the efficiency was in order of EPP(82.4%) > Perlite(76.1 %) > EPS(66.2 %) > Zeolite(65.2 %). The results in conclusion implies that EPP is most effective filter media for the highly contaminated fine particles from road runoff.

• 통상정보연구
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• 제15권4호
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• pp.3-25
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• 2013

본 연구에서는 서비스 상품으로 미래 신 성장동력 산업인 의료관광산업의 육성과 개발이 시급한 실정이다. 현실은 관광과 의료가 융 복합 산업의 새로운 경제패러다임의 중추적 역할을 하는 산업으로 성장시키기 위한 실질적 의료관광 마케팅 전략수립의 기초적 근거를 제공하고자 연구의 목적을 두었다. 설문지는 한국의 방한한 의료관광자 중 상위 3개국(일본, 중국, 미국)을 대상으로 조사를 하였습니다. 수집된 자료를 근거하여 의료관광 목적시 각국의 의료 여행자 행동의 관계를 분석하였다 이에 대한 분석결과는 의료관광서비스품질(신뢰성, 유형성, 편리성)은 지각된 가치에 정(+)의 영향을 미치는 것으로 조사되었다. 또한 이들 요인 중(신뢰성, 유형성, 반응성, 편리성)은 감정적 가치에 정의 영향을 미치는 것으로 나타났다.

• 산업경영시스템학회지
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• 제40권4호
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• pp.29-37
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• 2017

This papers focuses on remanufacturing processes in a closed loop supply chain. The remanufacturing processes is considered as one of the effective strategies for enterprises' sustainability. For this reason, a lot of companies have attempted to apply remanufacturing related methods to their manufacturing processes. While many research studies focused on the return rate for remanufacturing parts as a control parameter, the relationship with demand certainties has been studied less comparatively. This paper considers a closed loop supply chain environment with remanufacturing processes, where highly fluctuating demands are embedded. While other research studies capture uncertainties using probability theories, highly fluctuating demands are modeled using a fuzzy logic based ambiguity based modeling framework. The previous studies on the remanufacturing have been limited in solving the actual supply chain management situation and issues by analyzing the various situations and variables constituting the supply chain model in a linear relationship. In order to overcome these limitations, this papers considers that the relationship between price and demand is nonlinear. In order to interpret the relationship between demand and price, a new price elasticity of demand is modeled using a fuzzy based nonlinear function and analyzed. This papers contributes to setup and to provide an effective price strategy reflecting highly demand uncertainties in the closed loop supply chain management with remanufacturing processes. Also, this papers present various procedures and analytical methods for constructing accurate parameter and membership functions that deal with extended uncertainty through fuzzy logic system based modeling rather than existing probability distribution based uncertainty modeling.

• 정보학연구
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• 제7권3호
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• pp.63-81
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• 2004

전자상거래가 활성화되어가고 있는 상황하에서 우리나라는 물류의 아웃소싱에 대한 관심이 높아지고 있음에도 불구하고 국내 물류서비스를 담당하고 있는 제3자 물류업체는 규모가 영세하고 전문화된 활동영역이 미미하고, 화주기업의 경우에도 기업 내부정보의 유출과 통제력 약화 등을 우려하여 상호간 유기적 연계가 이루어지고 있지 않은 실정이다. 이에 따라 제3자 물류가 정착되기 위해서는 정부측면에서 불필요한 행정규제를 철폐하고 물류산업 활성활ㄹ 위한 특별법의 제정이 필요하고, 기업측면에서는 효율적인 물류전략 추진, 물류서비스 기반요소 확충, 물류업체 컨설팅 능력 확보, 정보기술에의 투자 등의 다각적인 전략이 요청된다.

• 농업과학연구
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• 제44권3호
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• pp.451-461
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• 2017

Korean agriculture has recently focused on the 6th dimension of industrialization, which includes the functions of healing and care. The green care and healing business is one of the most representative models, satisfying modern consumers' needs for care or healing in rural agricultural environments. Many studies have shown physical and social benefits from green care and healing, but studies regarding economic performance are rarely found. The present study aimed to analyze the economic feasibility of different green care and healing farm complexes proposed in recent domestic research, with various possible combinations of business scenarios. The results show that most of the scenarios are economically feasible as B/C (benefit-cost ratio) and IRR (internal rate of return) are 1.19 and 8.53%, respectively, under scenario 1. This study also performed a break-even analysis for providing more flexible decision-making information. Overall, scenario 1 from green care and healing site and scenario 4 from green care and healing cluster are found to be superior to the other scenarios in terms of B/C and IRR. The scenarios in this study reflect the domestic farms or complexes which have similar functions of care or healing. Therefore, the results of this study provide information on practical policies and business implications in making decisions on the specific size and operational patterns when adopting green care and healing complexes by central or local governments and private sectors in the future.

• 농촌지도와개발
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• 제7권2호
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• pp.257-277
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• 2000

The objectives of this study are to investigate the relationship between the growth of the horticultural sector and horticultural research and extension and to examine the socioeconomic returns to investment on research and extension in Korean horticulture. Data for horticultural production values, producer price indices and research and extension budgets for horticultural sector from 1965 to 1998 are collected from various sources. Multi-variate time series analysis technique with vector auto-regression model and Akino-Hayami Formula were employed for the analysis. This study finds (1) horticultural production responds about seven years later to the horticultural research investment shock. the magnitude of the impacts increases to a peak in seventeen years from the initial expenditures and then declines slowly thereafter until twenty years. and this peak gives a tip that horticultural research impact lasts much longer than grain's or agriculture's: (2) the social surplus from research investment benefits more to the consumer rather than to the horticultural producer: (3) B/C ratios in horticultural research are quite high with the range of 9 to 55 from 1965 to 1998. but these have been decreased since the early 1990s: (4) the socioeconomic returns to horticultural research is quite high with 56 percents of internal rate of return. It remains to be analyzed returns to investment on extension in horticulture because of no statistic significance in this study.

• 복식문화연구
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• 제19권4호
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• pp.876-887
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• 2011

The purpose of this study was to determine the fundamental foot measurement data that is essential for a shoes size system of women in their 20~30s according to a survey of Korean hand-made shoes companies. This research on the current situation of shoes companies was done by interviewing and surveying employees of these companies. The subjects for this study were 407 women in their 20s~30s who lived in a metropolitan area, and who wanted to enhance their foot health and prevent injury with a proper shoes size system. They were measured with the 3D scan method in use of 6th Size Korea. The result of this study showed that there is considerable dissatisfaction related to women's shoes and the current foot size system using foot length. The Korean hand-made shoes companies assessed here did not use the KS system, but they recognized the necessity of measuring the foot width and circumference, understanding that doing so properly can decrease the return and repair rate. And current target age for shoes bye the hand-made shoes companies was reported to be approximately 5 years. There were significant results according to ANOVA, factor and cluster analyses according to the age range pertaining to the foot length, circumference and height. Each element was significantly correlated with user's satisfaction. There were 5 factors and 3 clusters represented, and foot circumstance and width were as important as foot length with a range of 5 years.