• 산업경영시스템학회지
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• 제29권2호
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• pp.83-91
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• 2006

Internet shopping mall has become a huge distribution channel with dramatic growth in recent years. The number of consumers has exponentially increased as the scale of shopping mall has been large so that shopping malls with thousands or millions of consumers become a general case. However, it is essential to evaluate whether current assortment of consumers is proper or not in the strategic aspect in order to operate Internet shopping mall effectively and gain profits. That is, it is important to evaluate whether consumer strategy of corporation is proper or not from the corporation. Despite this business importance, consumer assortment has not been evaluated well and related study is not sufficient. This study supposes a framework for consumer assortment evaluation, which evaluates whether consumer assortment of Internet shopping mall is proper or not. In the framework for consumer assortment evaluation, analysis data based on order data and consumer data in database is made. Then, four factors, consumer maintenance rate, consumer profitability, consumer securing rate and consumer conversion are setup, and 22 measurement indexes are drawn. Finally, a consumer assortment evaluation score card is made by integrating them. This study has applied a supposed framework to a domestic typical community based shopping mall, and it is expected that the evaluation result will be used as informant strategic information to operate the shopping mall effectively.

• 융합보안논문지
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• 제11권5호
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• pp.21-29
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• 2011

이 연구의 목적은 시큐리티조직의 멘토링유형과 멘토링기능이 조직몰입에 미치는 영향을 규명하는데 있다. 이 연구는 2010년 수도권소재 5개소 시큐리티조직에 종사하는 시큐리티요원들을 모집단으로 설정한 후 판단표집법을 이용하여 최종분석에 이용된 사례 수는 총 198명이다. 연구에 사용된 설문지는 총 37문항으로 구성되었으며, SPSSWIN 18.0을 이용하여 빈도분석, 요인분석, 신뢰도분석, 다중회귀분석 등을 실시하였다. 설문지의 신뢰도는 Cronbach's ${\alpha}$값이 .622이상으로 나타났다. 결론은 다음과 같다. 첫째, 시큐리티조직의 멘토링유형은 멘토링기능에 영향을 미친다. 즉, 공식적 멘토링이 활성화 되면, 우정보호기능, 경력관리기능, 사회심리적기능은 촉진된다. 둘째, 시큐리티조직의 멘토링유형은 조직몰입에 영향을 미친다. 즉, 공식적 멘토링이 활성화 되면, 조직몰입은 증가한다. 셋째, 시큐리티조직의 멘토링 기능은 조직몰입에 영향을 미친다. 즉, 우정보호기능, 경력관리기능, 사회심리적기능, 역할모델기능이 촉진 될수록 조직몰입은 증가한다.

• 환경영향평가
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• 제20권3호
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• pp.313-324
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• 2011

The purpose of this study is to present the raw data for establishing the plan of top soil conservation in soil environment and preventing the soil loss by establishing the potential amount of soil loss using RUSLE. The results are as follows. To apply the RUSLE model, we calculated the potential amount of soil loss by using 5 factors; rainfall erosion factor(R), topographical factor(LS), soil erosion factor(K), land cover factor(C) and erosion control factor(P). The assessment map of soil loss was drawn up by classifying 5 grades. According to the soil loss estimation by the RUSLE, it showed that approximately 83.9% of the study area had relatively lower possibility of soil loss which was the 1 ton/ha in annual soil loss. Whereas, the 7.0% of the study area was defined as high risk area which was the 10 ton/ha in annual. Therefore, this area was needed that there was environment-friendly construction of farm land, improvement of cultivation environment and so forth. In future, if we will analyze the amount of soil loss of Gyeongju national park and Hyeongsan river watershed, we will offer the help to establishing the conservation plan of soil environment in Gyeongsangbuk-do.

• Journal of Biosystems Engineering
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• 제10권2호
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• pp.1-11
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• 1985

A double pipe grain heater using engine exhaust gas as a heat source was developed. The performance of the grain heater was examined with soybeans as a test material experimentally and numerically using a mathematical model constructed. The following conclusions were drawn: 1. The modified screw conveyor used in the grain heater has a characteristic of decreasing capacity with increasing speed at speeds above 60 rpm. Operation with speeds below 60 rpm is recommended. 2. Heating soybeans by the heater at soybean flow rate up to 100 kg/hr, inlet temperature of the exhaust gas to the heater are recommended as above $400^{\circ}C$, $300^{\circ}C$, and $200^{\circ}C$ roughly for a 2, 5, and 10 kW engine, respectively. 3. Temperature increments of soybean by the heater at soybean flow rates ranged from 25 to 100 kg/hr are in the ranges of $6^{\circ}C-35^{\circ}C$, $15^{\circ}C-88^{\circ}C$, and $15^{\circ}C-140^{\circ}C$ with exhaust gas from a 2, 5, and 10 kW engine, respectively, at an exhaust temperature of $500^{\circ}C$. 4. Thermal efficiency of the heater at soybean flow rates ranged from 25 to 100 kg/hr are in the ranges of 35-37%, 28-34%, and 20-29% with exhaust gas from a 2, 5, and 10 kW engine, respectively. 5. The grain heater can be used to heat the other grain, also, without any bad effect from the exhaust gas used as a heat source.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2008년도 춘계 종합학술대회 논문집
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• pp.431-435
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• 2008

인터넷의 발달에 따라 온라인 시장이 급진적으로 확대되고 있으며, 이에 따른 비즈니스 수익모델들이 많은 관심을 모으고 있다. 대부분의 온라인 상거래가 게임의 아이템이나 물건들을 거래하는 것에 국한되어지고 있으나, 2003년 Linden Lab 에서 공개한 가상현실 Second Life는 사용자들이 가상세계에 자신의 아바타를 만들어서 제2의 삶을 만들어가는 가상현실 게임이다. 2003년 공개 이후 전 세계에서 현재 1200만 명이 넘는 사용자를 확보하며 급성장을 하고 있다. 기존의 게임들이 정해진 시나리오대로 게임을 풀어나가는 반면, Second Life는 현실과 동일한 가상 환경에서 개인의 삶을 만들어가는 방식으로 타게임들 과의 차별성을 두고 있다. 또한 가상의 화폐인 Linden Dollar를 기반으로 하는 경제 시스템을 기반으로 하고 있어서 현실과 동일한 부동산 취득, 옷, 신발 등 경제 활동이 일어나고 있으며, 기업의 마켓팅 수단이외에 공공기관의 홍보 및 정치, 교육에 이르기까지 다양한 분야에서 세컨라이프를 통한 활동이 활발하다. 국내에서도 2007년 말에 한국어 서비스를 제공함으로서 관심이 높아지고 있는 현실이다. 본 연구에서는 Second Life를 통한 비즈니스 모델의 사례를 알아보고, 문화 콘텐츠분야에서 응용이 가능한 비즈니스 수익모델 방향을 제시하고자 한다.

• 한국치위생학회지
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• 제18권2호
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• pp.165-175
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• 2018

Objectives: This study aims to examine the factors that influence the organizational citizenship behavior of clinical dental hygienists to use them as basic data for improving effectiveness and efficiency of dental clinics and hospitals. Methods: A self-reported questionnaire was answered by 250 clinical dental hygienists in Seoul, Gyeonggi, Chungcheong, Jeolla and Gyeongsang province areas who were chosen using convenient sampling method from May 1st to June 30th of 2017. The data was analyzed using IBM SPSS/WIN 22.0 factor analysis on clinical dental hygienists' organization citizenship behavior, organizational commitment, empowerment, self-leadership and job satisfaction. T-test and one-way ANOVA were performed for subjects' general characteristics and organizational citizenship behavior, organizational commitment, empowerment, self-leadership and job satisfaction depending on their job characteristics. The mean comparison was drawn using the Scheffe test. Pearson's correlation and multiple regression analysis were performed to examine the relation of clinical dental hygienists' organizational citizenship behavior, organizational commitment, empowerment, self-leadership and job satisfaction Also, the significance level was set at 0.05. Results: Clinical dental hygienists' organizational citizenship behavior was 3.84 points with organizational commitment of 3.27, empowerment of 3.41, self-leadership 3.45 and job satisfaction of 3.57. Factors that influence clinical dental hygienists' organizational citizenship behavior appeared in the order of organizational commitment, job satisfaction, self-leadership, empowerment and job intensity, and the model's explanation power was 45.6%. Conclusions: Clinical dental hygienists' organizational citizenship behavior was correlated to career, organizational commitment, empowerment, self-leadership and job satisfaction, where organizational commitment had the biggest influence. Therefore, clinical dental hygienists organizational citizenship behavior needs further studies and investigtae more ways to promote factors that influence organizational citizenship behavior.

• 한국치위생학회지
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• 제18권2호
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• pp.205-215
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• 2018

Objectives: The purpose of the study is to investigate the relationship between the number of remaining teeth and bone health status among adults over 65 years old. Methods: The study subjects were 1,843 adults over 65 years old drawn from the Korea National Health and Nutrition Examination Survey (KNHANES) in 2008-2010. Oral health status included the number of remaining teeth, and prosthetic appliance status. Bone health statuses were assessed using dual-energy X-ray absorptiometry (DEXA). Bone health statuses were classified into normal (T-score ${\geq}-1.0$), osteopenia (-2.5 < T-score < -1.0), and osteoporosis (T-score ${\leq}-2.5$). Complex samples chi-square test was used to estimate the relationship between the number of remaining teeth and bone health status, and related factors included in the model were analyzed with the complex samples logistic regression analysis. Results: Using the multinomial logistic regression analytic method, the elderly having 20 or more remaining teeth and those having less than 20 remaining teeth with prosthesis were compared. The latter group had 1.89 times higher rate of being diagnosed as having osteoporosis. Conclusions: This study suggests that oral health is an important factor for geriatric osteoporosis. Therefore, in order to prevent fractures due to osteoporosis and osteoporosis in old age, it is necessary to be aware of the relationship between oral health and osteoporosis, and oral health should be considered when preparing preventive management strategies.

• 한국농공학회논문집
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• 제53권1호
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• pp.17-28
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• 2011

This study was performed to ascertain the possibility of securing inflows to reservoir with low ratio of watershed to paddy field areas by outside diversion weir. The case of Maengdong reservoir and Samryong diversion weir was selected. Most of inflows to Maengdong reservoir with watershed area of $7.06\;km^2$ and total storage capacity of $1,269{\times}10^4\;m^3$ are filled with intake water from outside Samryong diversion weir. Only using water storage data in Maengdong reservoir from 1991 to 2009, the range of water intake in Samryong diversion weir to Maengdong reservoir was optimized to 0.135~30 mm/d, from which water intake to Maengdong reservoir was $1,672.9{\times}10^4\;m^3$ (70.1 %) and downstream outflow to Weonnam reservoir was $714.4{\times}10^4\;m^3$ (29.9 %). The parameters of DAWAST model for reservoir inflow were determined to UMAX of 313.8 mm, LMAX 20.3 mm, FC 136.8 mm, CP 0.018, and CE 0.007. Inflows to Maengdong reservoir were $427.1{\times}10^4\;m^3$ (20.3 %) from inside watershed, and $1,672.9{\times}10^4\;m^3$ (79.7 %) from outside. Paddy irrigation water requirements were estimated to $1,549{\times}10^4\;m^3$ on annual average. Operation rule curve was drawn by using daily inflow and irrigation requirement data. By securing the amount of inflow to Maengdong reservoir to about 80 % from outside Samryong diversion weir, water supply capacity for irrigation of $1,549{\times}10^4\;m^3/yr$ was analyzed to be enough. Additional water supplies for instream flow were analyzed to $1,412\;m^3/d$ in normal reservoir operation, $36,000\;m^3/d$ in withdrawal limit operation by operation rule curve from October to March of non irrigation period.

• 한국구조물진단유지관리공학회 논문집
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• 제7권3호
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• pp.251-262
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• 2003

교량의 건설계획단계에서 LCC을 고려한 의사결정이나 공용중인 교량의 체계적인 유지관리 전략을 수립하기 위해서도 최소한의 점검결과만으로 노후화를 예측할 수 있는 LCP가 필요하다. 본 연구에서는 국내외 연구결과를 토대로 무리함수 $y=\sqrt{y^2_0-at}$로 표현되는 LCP를 제안하여 국내외연구결과에서 적용한 D/B에 적용한 결과 상관계수가 0.99이상으로 노후화 경향을 표현할 수 있었으며, 전국에 분포되어 있는 슬래브교량을 대상으로 정밀점검 및 정밀안전진단의 BMS를 Fuzzy Logic을 이용하여 정량적 평가하여 회귀분석을 실시한 결과 0.81의 상관계수를 갖는 노후화 예측모델을 도출할 수 있었다.

• Restorative Dentistry and Endodontics
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• 제17권1호
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• pp.36-54
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• 1992

The purpose of this study was to compare the shear bond strengths to ground dentin surfaces of four dentinal bonding agents in 193 teeth. Various dentin surfaces treated with four dentin bonding agents were attached with two restorative composite resins. The effectiveness of the bonding were tested by the monitoring the shear bond strength. The shear bond strengths were measured after 2 hours and 24 hours after surface conditioning with four dentin bonding agents. Effects of EDTA, the additive illumination, and sealer treatments without primer on bond strength to dentin surfaces were assessed. In addition the effects of the thickness of specimens ranging from 0.65 mm to 1.95 mm and the ratio of catalyst and base paste on the bond strength of chemical cure composite resin were estimated. The shear bond strength was determined by testing specimens in the Instron universal testing machine (Model No. 1122) at a crosshead speed of 1.0 mm/min. Following condusions were drawn: 1. The highest mean shear bond strengths of chemical cure composite resin to dentin conditioning with dentin bonding agents aged 2 hours were obtained, and then that was decreased with time followed by EDTA treatment. 2. In light cure composite resin, the shear bond strength was increased following dentin conditioning with bonding agents with time, irradiation time and EDTA treatment except in SB group. 3. The thicker the composite resin specimen was, the less the shear bond strength in chemical cure composite resin was. 4. In light cure composite resin, there was a little change in shear bond strength following dentin conditioning with bonding agents. 5. In chemical cure composite resin, the shear bond strength was the highest in the ratio of 1/1 of catalyst and base part. 6. Without a dentin primer, shear bond strength to dentin conditioned only with UB sealer was the highest among four sealers in light cure composite resin.