• 한국산학기술학회논문지
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• 제17권6호
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• pp.157-165
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• 2016

하이테크 제품 중에서 이동통신 단말기는 빠른 속도로 혁신이 이루어지고 있으며 이에 따라 제품수명주기도 짧아지고 있다. 이렇게 짧아진 제품수명주기를 정확히 예측하기 위해서는 정확한 수요예측방법론의 선택이 중요하며 이는 전략적 경영계획 수립에 가장 기본적인 요소라고 할 수 있다. 본 연구의 목적은 이동통신 단말기의 전체 확산 수명에 적용될 수 있는 최적의 모형을 제시하는 것이다. 우리는 2013년 3월부터 2014년 8월까지 국내 특정 이동통신 서비스 사업자의 이동통신 단말기 판매 데이터를 활용하여 이동통신 단말기의 판매추이 및 수요예측을 위한 최적의 모형을 제시하고자 한다. 본 연구에서는 네 가지 모형의 성능을 비교분석하였는데 두 가지 S자형 확산모형인 Gompertz와 logistic 모형, 두 가지 비선형 회귀모형인 Michaelis-Menten과 logarithmic 모형을 비교한다. 모형 적합도에 따르면 logistic 모형이 모형일치성에 있어서 다른 세 개의 모형보다 성능이 우수한 것으로 발견되었으며 수요예측모델로는 확산이 정체하기 전까지는 logistic 모형이 우수하며 포화단계에 근접할수록 Gompertz 모형이 적합한 것으로 나타났다. 이러한 분석결과는 이동통신 단말기 시장 규모를 추정하거나 이동통신 단말기의 재고 및 주문관리를 하는데 있어서 유용한 자료로 활용될 수 있을 것이다.

• 한국조리학회지
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• 제3권
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• pp.385-421
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• 1997

This study was performed as placing stress on business plan preparation and investing economy analysis centered to cases upon presenting the premises of study for new foundation of food service business. The summarized results are as follows: 1. In the aspect of carrying out process of practical project, establishing the promotion strategy, the facility project program, the menu program, the facility and furniture program, organization & manning schedule, the business operation schedule, review of all laws & provisions and the allout promotion schedule in order were deployed. 2. Analysis of investing economy for review of profitability 1) In case of investment, excluding 600million for the real setate lease among the total investment of 1billion, it was required by 161, 235, 000 for interior project, 161, 110, 000 for facility & equipment, 19, 235, 000 for fittings, 27, 600, 000 for menu plate & uniform, 27, 600, 000 for furniture, 13, 800, 000 for sign article. 2) In case of loss & profit presumed the annual turnover is to be 1, 115, 856, 000 the contigent profit(before tax) is to be 148, 966, 000 which is 13.3% in comparson to the sales amount and the net profit(after tax) for this term s to be 104, 276, 000 which is 9.3% against the sales and the profitable ratio to the equity investment( 500 million) is 20.9% and it satisfies 20% of the premises of study. 3) In case of the payback period will be approximately two(2) years which indicated within three(3) years that is standard of new project evaluation term of ordinary enterprise. 4) In case of internal rate of return it will be 21.5% which is favorable profitability as taking into account of 15% that is standard of new project evaluation by ordinary enterprise based on general downtown money interest. That the investing value of Happy Day profitability is hinted as it is sufficient enough as the case under this study based upon such results and considered that securing supremacy is competitive power in case of commitment will be possible.

• Asia Marketing Journal
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• 제14권2호
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• pp.1-22
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• 2012

Gifticon is an innovative new service of SK Marketing & Company. Launched in the end of 2006 for the first time in the world, the mobile gift certificate is in the form of a SMS message that bears a bar code to exchange with real products sent to the intended recipient through internet portal, messenger or/and mobile phones. The service started by connecting individuals (B2C business) and was expanded to the new marketing tools of companies (B2B business). While the business took off with soft progress in the initial year of launch, Gifticon business finally gained its momentum in the growth of sales in its second and third year. Yet, the data showed that the growth of user-base was getting stagnant that the number of users remained flat for the past few months. Moreover, competition from latecomers such as Giftishow from KTF and Heartcon from LG Telecom gets fierce. Particularly in B2B sector where Gifticon has made minimal profit, competitors started aggressive promotional activities, taking away shares from Gifticon. Under these circumstances, team is facing tough strategic decisions for its long-term growth; How can they further grow the business? Should they go after more massive targets for broader user-base? Should they pursue B2B business more aggressively? This case study asks students to come up with solutions for these questions by understanding concepts, theories and models for diffusion of innovations and strategies to overcome a chasm.

• Journal of Preventive Medicine and Public Health
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• 제39권4호
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• pp.365-370
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• 2006

Objectives: The purpose of this study was to investigate the differences in smoking rates according to the major occupational categories in South Korea. Methods: The study subjects were a weighted sample of 24,495 men and 26,121 women aged 25-64 from the 2003 Social Statistics Survey, which was conducted by the Korea National Statistical Office. Occupation was classified according to the Korean Standard Occupation Classification. We computed the age-standardized smoking rates according to gender and occupations after adjusting for the education level, marital status, and self-rated health. Results: For men, the smoking rate in elementary occupations was two times higher than that of clerks (OR=1.98, 95% CI=1.74-2.26). In general, a more prestigious job(professionals) correlated with lower smoking rates, and less prestigious jobs correlated with higher smoking rates, except for legislators, senior officials and managers. For women, smoking among service workers was 4.1 times higher than among clerical workers (OR=4.11, 95% CI=2.87-5.88). For women, their occupations, except elementary workers, and the unemployed, the retired and the armed forces, failed to show significant differences in smoking compared with the clerical workers. After adjusting for education, occupational differences in the smoking rate for men were attenuated in most occupations, except for legislators, professionals, and technicians. Further adjustment for marital status and self-rated health had a minimal effect on the occupational differences in the smoking rate for men. For women workers with service or elementary occupations, the ORs of smoking were attenuated with adjustment of the educational levels. However, the ORs of smoking were increased in workers with service, sales or elementary occupations, as well as for legislators, and the unemployed, the retired and the armed forces, after additionally adjusting for marital status. Conclusions: More prestigious jobs generally correlated with lower smoking rates in both sexes. The anti-tobacco policy should consider smoking rate differentials by occupations.

• 한국인구학
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• 제20권1호
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• pp.129-159
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• 1997

본 연구는 한국사회의 산업화과정에서 배제되어 왔던 전북지역에서 직업집단들간에 생활기회가 얼마나 차등적으로 나타나고 있는지 분석하였다. 좀더 구체적으로 본 연구는 6개 직업범주에 속하는 사람들간에 생활기회의 하위영역인 건강상태와 여가생활 각각이 얼마나 차등적으로 나타나고 있는지 분석하엿다. 분석결과에 의하면, 직업별로 생활기회가 차등적으로 나타나고 있음을 확인할 수 있었다. 즉 직업적 위세가 높은 직업에 종사하는 사람들은 좀더 좋은 생활기회를 가지고 있으며, 역으로 직업적 위세가 낮은 직업에 종사하는 사람들은 열악한 생활기회를 가지고 있다. 먼저 전문-관리직 종사자들은 모든 영역에서 가장 우수한 생활기회를 누리고 있었다. 그 다음으로 전문-기술직, 사무직, 그리고 판매-서비스직 종사자들이 높은 생활기회를 누리고 있다. 그러나 이들 3개 직업집단들 모두가 모든 영역에서 일치된 생활기회를 가진 것은 아니다. 특히 전문-기술직 종사들은 일의 자율성과 안정성에도 불구하고 작업환경의 열악성과 그것이 건강에 미친 영향을 부정적으로 인식하고 있다. 반면에 판매-서비스직 종사자들은 낮은 사회적 인식에도 불구하고 일의 자율성과 높은 수입 등으로 비교적 높은 생활기회를 누리고 있다. 그러나 농업과 생산직 종사자들은 비교적 열악한 생활기회를 가지고 있다. 특히 농업 종사자들은 여가생활부문을 제외한 다른 부문에서 생산직 종사자들보다 상대적으로 좋은 기회를 가지고 있었다. The main purpose of this study is to describe the different life chances among various occupational groups in Chonbuk Province which has been excluded in the process of Korea's industrialization since the 1960s. More specifically, this study analyzed to what extent 6 occupational groups have the different life chances in the sub-levels such as health conditions and leisure life. According to our data analysis, it is found that the 6 occupational groups have the different life chances. That is, while those who are engaged in the higher prestigious occupation have a good life chance, those who in the lower prestigious occupation have a worse life chance. For example, among 6 occupational groups, professional-managerial who secure the higher autonomy and stability in their work have the highest life chance in the labor and health, and leisure life. Next, professional-technical, white-collar, sales-service occupants have the higher life chance after the professional-managerial. However, these 3 occupation groups are partially inconsistent in the two sectors of the life chance. Specifically, the professional-technical, despite their autonomy and stability in the work world, conceived that their work conditions are worse as well as badly influencing on their own health. On the other band, the sales-service workers group, despite their lower social status, is relatively autonomous and stable in their work environment and thus has the higher life chances. Finally, agricultural and productive workers have relatively the lower lift chances. Nevertheless, there are some clear differences among these 2 occupational groups. That is, the farmers have relatively the higher life chances in the sectors of socio-economic characteristics, and labor and health rather than productive workers. As a result, the productive workers are generally located in the lowest level of life chance. This fact is particularly attributed to the fragility of manufacturing industries in Chonbuk Province.

• 서비스연구
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• 제14권1호
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• pp.27-43
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• 2024

중고차 시장에서 온라인 플랫폼 서비스의 시장 점유율은 지속적으로 증가하고 있다. 또한 중고차 온라인 플랫폼 서비스는 서비스 이용자에게 차량의 제원, 사고 이력, 점검 내역, 세부 옵션, 그리고 중고차의 가격 등을 공개하고 있다. 2023년 현재 국내 자동차 시장에서 SUV 차종의 신차 점유율은 50% 이상으로 확대되었으며, 하이브리드 차종은 신차 판매량이 지난해에 비해 두 배 이상 증가하였다. 이에 따라 이들 차종은 국내 중고차 시장에서도 인기를 끌고 있다. 기존 연구는 전체 차량 또는 브랜드별 차량을 대상으로 머신러닝 모델을 실행하여 중고차 가격 예측 모델을 제안하였다. 반면 국내 자동차 시장에서 SUV와 하이브리드 차종의 인기는 매년 상승하고 있으나, 이들 차종을 대상으로 중고차 가격 예측 모델을 제안한 연구는 찾기 어려웠다. 본 연구는 국내 시장에서 자국 브랜드가 생산한 세단, SUV, 그리고 하이브리드 차종을 대상으로 차량 제원과 옵션, 총 72개의 특성을 활용하여 이들 차종별 가장 우수한 중고차 가격 예측 모델을 선정하였다. 이를 위해 특성 선택으로 Lasso 회귀 모델을 활용하여 특성을 선별한 후 동일 샘플링으로 앙상블 모델을 실행하였다. 그 결과 모든 차종에서 최우수 모델은 CBR 모델로 선정되었으며, 차종별 최우수 모델을 대상으로 Tree SHAP Value의 시각화를 실행하여 특성의 기여도 및 방향성을 확인하였다. 본 연구의 시사점으로 온라인 플랫폼 서비스를 이용하는 매매관계자에게 차종별 중고차 가격 예측 모델을 제안하고 특성의 기여 수준과 방향성을 확인함으로써 이들 간 정보의 비대칭으로 야기된 문제 해결에 지원이 될 것으로 기대한다.

• 대한임상독성학회지
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• 제16권2호
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• pp.172-175
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• 2018

Acute nicotine poisoning by liquid nicotine for electronic cigarettes is becoming an increasing problem worldwide. On the other hand, there are no regulations regarding its concentration, container or labelling in Korea. This is the first case of a cardiac arrest after liquid nicotine ingestion that was confirmed by plasma nicotine detection in Korea. A 34-year-old male was found with a cardiac arrest at home by the emergency medical services crew, and had a return of spontaneous circulation after 27 minutes of cardio-pulmonary resuscitation. The cause of his cardiac arrest was suspected to be acute nicotine poisoning by the ingestion of liquid nicotine. Toxicology analysis of the National Forensic Service confirmed plasma nicotine, and the pharmacokinetic estimated average concentration of plasma nicotine at the time of the cardiac arrest was 29.7 mg/L, a lethal dose. He was hospitalized for further treatment, but was discharged after 20 days without any improvement. Considering the strong toxicity of nicotine, appropriate policy decisions are required for sales and distribution.

• 대한안전경영과학회지
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• 제15권4호
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• pp.323-330
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• 2013

The number of domestic smartphone users exceeded 30 million people, and the time in the future everyone will use a smartphone that will come with ago. Past purchase decisions, related research and product from the competition between the past case and the relevant literature for the smartphone market smartphone type to derive a purchase decision factors in the decision to purchase any difference between the factors. Literature and practices through performance, switching costs, product loyalty, design, brand, after-sales service, the price more than 7 variables were analyzed. One hundred people surveyed, respectively, did not obtain the response of a variety of ages and occupations, age of the sample used in the analysis of this study, and is concentrated as a student at the university of smartphones used to facilitate users analysis was done. We expect smartphone companies and related companies to be able to give guidelines for effective technology management.

• Journal of Information Technology Applications and Management
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• 제9권3호
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• pp.47-56
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• 2002

A variety of enterprises have Implemented ERP system on the promises of feasible strategic benefits. The objectives of this study are (1) to classily and analyze the motives and critical success factors o the enterprises'ERP system adoptions, and (2) to measure their impacts on the business performance. The data for this research were collected from 43 cases in Korea that have operated ERP system for more than 6 months after the implementation. This study results reveals that the Information strategic planning and business strategy establishment prior to ERP adoption and the demands of field people activate as critical triggers In the larger firms Among the six critical success factors, training was statistically significant for all of four performance measures control, cost reduction, quality and service, and work efficiency. And other findings are furnished. Also the larger company group In the sales volume has shown the higher performance except work efficiency.

• 한국조리학회지
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• 제4권
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• pp.481-499
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• 1998

In the present situation of national economy crisis, known as IMF, the hotel and tourist industry are undergoing financial difficulties. Particularly the hotel food and beverage business has experienced a significant reduction in sales. The results of the case study of the wheat noodle restaurant of the A hotel prompt for a change in business style and management. After researching menu, business records and other factors, it was recommended to open a new korean style restaurant in place of the current one. It was also recommended to include noodle dishes into menu in order to keep old customers. Besides, these changes, considering the fact that the noodle restaurant typically has a peak hour at lunch time, and the Korea one at dinner, will be quite practically useful in proper personal management in the service aspect.