• 정보처리학회논문지C
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• 제16C권1호
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• pp.27-36
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• 2009

최근의 개인정보 노출의 가장 큰 원인은 정당한 개인정보 관리자 즉, 내부자에 의한 부정 이용이다. 관리자는 사용자의 기밀문서를 몰래 복사하거나 고쳐 쓰는 것도 가능하다. 이러한 민감한 개인 및 기업 데이터의 안전한 관리 대책으로서 기밀정보의 안전한 분산 저장관리 기능이 요구되고 있다. 한편, 개인정보를 제공하는 경우, 정보 소유자가 프라이버시 데이터를 누구에게 얼마만큼 가중치(weight)을 두고 공개할지를 정해야 한다. 따라서 참여자의 중요도에 따라 개인정보 열람에 대한 권한의 가중치를 다르게 지정할 수 있는 구조가 요구된다. 본 논문에서는 개인정보를 권한의 가중치에 따라 안전하게 관리할 수 있는 새로운 데이터 관리 기법을 위한 Digit-independent 알고리즘을 새롭게 제안한다. 제안된 알고리즘을 근거로 데이터의 수집과 단순한 연산만으로 고속 연산처리가 가능하여 대량의 프라이버시 데이터에 적용할 수 있는 데이터 관리기법으로서 가중치 테이블 기반의 Digit-independent 알고리즘을 이용한 데이터 분할 복원 방식을 제안한다. 제안 방식은 유비쿼터스 환경에서 e-비즈니스 데이터의 안전한 관리 및 저장에 활용될 수 있을 것이다.

• Human Ecology Research
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• 제62권1호
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• pp.33-45
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• 2024

This study aimed to identify the need for dietary management due to weight changes among middle-aged women in the Gwangju area during the COVID-19 pandemic. To achieve this, a survey was conducted of their eating habits, dietary and lifestyle habits, alterations in food intake, and changes in menopausal symptoms. Overall, significant differences were found between dietary and lifestyle habits (p<.01) depending on the frequency of eating out. Specifically, those who eating out two to three times a week exhibited a significant increase in negative habits such as ordering delivery food and consuming instant meals. In terms of food consumption changes, those who eating out two or three times a week displayed a relatively higher increase in the consumption of non-recommended food than those who eating out once a week. Regarding changes in menopausal symptoms, individuals who eating out two to three times a week experienced a greater increase in the severity of menopausal symptoms than those who eating out once a week. In terms of dietary and lifestyle habit changes, it was found that the more frequent the exercise, the greater the overall improvement in dietary and lifestyle habits (p<.001). Moreover, women who did not experience weight gain exhibited positive changes in their dietary and lifestyle habits compared with women who experienced weight gain. The results for food consumption changes revealed that the consumption of non-recommended foods was higher in middle-aged women who experienced weight gain, particularly the consumption of meat (p<.001) and noodles (p<.05).

• Journal of Nutrition and Health
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• 제55권3호
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• pp.406-417
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• 2022

Purpose: The incidence of chronic diseases is increasing and the age of onset is decreasing in South Korea. Healthy eating habits to prevent chronic diseases are established in adolescence. This study verified the identified factors and dynamics that affect diet self-assessment for sustainable adolescent health and the prevention of chronic diseases. Methods: Data were collected from 492 middle and high school students in South Korea from June to July 2018, and the participants answered a questionnaire on dietary safety management competency for sustainable health. Results: The healthy dietary self-assessment scores of overweight/obese adolescents and adolescents who perceived their health as normal were significantly lower than those of other groups. Factor analysis verified the validity of the items that comprised each study area before a multiple regression analysis was used to investigate the factors affecting healthy dietary self-assessment. Sweet and salty diets, anxiety, food and nutrition knowledge, weight management knowledge, stress management, exercise, basic eating habits, and healthy eating habits significantly affected healthy dietary assessment among adolescents. A higher perception of one's health indicated a higher healthy dietary self-assessment, dietary safety knowledge, and health management practice scores (p < 0.01). Factors like healthy dietary self-assessment, food and nutrition knowledge, and weight management knowledge appear to have a significant correlation with other identified factors, except overeating. The adolescents' awareness, knowledge, and dietary safety practices influenced healthy dietary self-assessment, which can prevent chronic diseases and achieve sustainable health. Conclusion: This study illustrated how the adolescents' awareness, knowledge, and practices of dietary safety influenced their healthy diet self-assessment. The results indicate that diet-based health management competency education relative to the adolescents' self-perception and weight levels should be implemented.

• 대한토목학회논문집
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• 제30권6D호
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• pp.663-673
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• 2010

본 연구에서는 사회기반시설에 사전 대응적 방식의 자산관리 체계를 도입하기 위해 자산관리정보시스템을 개발하고 있다. 본 연구는 향후 자산관리정보시스템의 개발과 운영을 위한 방향을 모색하기 위한 목적으로, 자산관리정보시스템의 예상되는 성과를 평가하기 위한 사용자 만족도와 자산관리기능이 유지관리 업무에 미치는 영향정도를 분석하기 위해 연구 모형을 체계화하고 평가기준을 선정하였다. 선정된 평가기준에 따라 중요도를 산정하기 위해 AHP 분석 방법을 사용하였다. 중요도의 논리적 일관성을 검증하였으며 한쪽으로 편중된 이상치를 최소로 반영하기 위해 대용가능지수를 계산하였다.

• 한국환경과학회지
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• 제30권3호
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• pp.289-293
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• 2021

This study was conducted to investigate the distribution of duck production in duck housing as a function of the breeding period. The items in duck production distribution included body weight, feed intake, feed conversion ratio, and average duck production. All data were based on eight cycles (June and December, 2017; February, June, August, September, and November, 2018; February, 2019) at Farm Site 1 through 7. The most optimal results in the duck production distribution were observed at Site 1 for weight gain, feed intake, and feed efficiency. This could be explained by the fact that Site 1 was well managed in environmental improvement and sustainability. Based on these data, selective alternatives to improve duck production in duck farms are recommended as follows: first, proper management and recording of litter used as a flooring material are required, and second, continuous management such as temperature, relative humidity and ventilation is needed. Lastly, it is necessary to change duck facilities by introducing environmental management techniques. Furthermore, efforts to improve the overall facilities and management of duck breeding farms through additional field studies are needed in the future.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제6권1호
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• pp.109-119
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• 2002

If C is a code, an orphan is a coset without any parent. We investigate the structure of orphans of the code BCH(3, m). All weight 5 cosets and all weight 3 reduced cosets are orphans, and all weight 1,2 and 4 are not orphans. We conjecture that all weight 3 unreduced cosets are not orphans. We prove this conjecture for m = 4, 5.

• 품질경영학회지
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• 제21권2호
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• pp.232-241
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• 1993

The objective of this study is to develop an algorithm in the consideration of importance Weight and desirable shape of specific department in the computerized layout planning. Quantitative relationship chart between each department was used. It is decided that the priority among the department as to variable factors and the optimum quantitative relationship chart was obtained using by the Weighting method. The algorithm presented in this study could generate more practical layout for the actual design problem.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.566-569
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• 1996

Steel making using EAF (Electric Arc Furnace) consists of three major processes: molten steel making, slab casting and hot rolling. Orders from customers, which includes their requirements such as composition, order quantity with allowable range, width, thichness, and unit weight of coils etc, are grouped as charges for EAF to enhance the productivity of the furnace. This paper develops an efficient grouping algorithm for charges in the EAF by exploiting the order characteristics: the allowable ranges of furnace capacity, order quantity, and unit weight of coils. Numerical test shows that the proposed heuristic works very efficiently and the results are quite satisfactory.

• Management Science and Financial Engineering
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• 제14권1호
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• pp.87-90
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• 2008

We show that when a max-cut problem is allowed native-weight edges, to decide if the problem has a cut of a positive weight is NP-hard. This implies that there is no polynomial time algorithm which guarantees a cut whose objective value is no less than $1/p(<I>)$ times the optimum for any polynomially computable polynomial p, where denotes the encoding length of an instance I.