• Korean Journal of Community Nutrition
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• v.2 no.3
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• pp.338-348
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• 1997

This study was conducted to investigate the health and nutritional status of 123 middle aged men at their worksite in Taejon. The results of this study on the factors that influence their health and nutritional status were as follows : 1) 74.8$\%$ of the subjects had history in the order of alimentary, heat, liver, diabetic and pulmonary diseases. 30.3$\%$ stopped smoking at 42.3% yrs. and 74.5$\%$ smoked more than 10 cigarets per day. Also 71.9$\%$ drank 2-3 times per week and 35.3$\%$ drank 1-2 times per week. 91.4$\%$ exercised more than 30min every day. 2) 54.4% showed concerns about their health whereas 20.3$\%$ were afraid that they night get sick. 3) 90.4$\%$ ate regularly and 54.5$\%$ worried about their cholesterol, salt, fat and MSG intakes. 48.7$\%$ ate out 1-2times per week and their favorite foods eaten outside were Korea. 4) 41.5$\%$ were classified as 'normal A', 30.9$\%$ 'normal B' group and high blood pressure and liber diseases in 'doubtful for disease' group were pointed out from their 1996 health check ups. 5) By Broca index, 39.8$\%$ were overweight and 9.8% were obese however by BMI only 23.6% were overweight. According to the relationship between calculated and self recognized obesity, 62.4$\%$ categorized themselves into the right weight range but 34.3$\%$ thought they were thinner than they were. 6) 43.9$\%$ were border line in cholesterol intake and 12.1$\%$ needed medical care for high blood cholesterol. 7) The Average energy intake was 1970.6㎉(80.9$\%$ RDA) with a 65 :19 : 16 ratio of carbohydrate : protein : fat. Protein, Fe, thiamin, riboflavin, niacin and Vit. A. 8) Occupation, regularity of meals, partner's job, income. smoking, alcohol drinking, health concerns and eating out were the factors that influenced the subject's nutrient intakes and health status. from this study, it was found that middle aged men needs to know their health and nutritional status and to be educated correct health and nutritional information through formal or informal channel. The worksite is the vest place to do this and we want these results to be used to develop the nutrition education program for middle aged men at the worksite.

• Journal of Nutrition and Health
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• v.47 no.1
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• pp.67-76
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• 2014

Purpose: This study was conducted in order to analyze the dietary habits and food intake status according to the prevalence of depression in adults. Methods: A total of 496 subjects, 224 men and 272 women aged 50 to 100 years were recruited from more than 13 cities in Korea. The questionnaires consisted of general characteristics, dietary life status, food intakes, the mean mini dietary assessment and satisfaction with food-related life questionnaire of the subjects to ask according to the degree of depression. Depression status was evaluated according to the Korean form of the Geriatric Depression Scale (K-GDS). Results: All subjects were divided into depression or normal groups; the prevalence of depression was 13.8% (male) and 23.9% (female). People aged 65 or older were more likely to have higher prevalence of depression and to be bereaved. People in the depression group had poor appetite, almost never dined-out, and ate alone. The food intake of miscellaneous cereals, beans, tofu, chicken/duck meat, cabbage, carrot/amber, fungi, apple, pear, strawberry, grapes, and banana was significantly higher in the normal group compared with the depression group. In particular, significantly higher intake of vegetables and fruits was observed in the normal group. In addition, subjects in the depression group ate more fatty meat and were more dissatisfied with food-related life than those in the normal group. Conclusion: The results of this study imply that the prevalence of depression may affect the dietary habits, food intake, and dietary behaviors in the older adult population.

• Parasites, Hosts and Diseases
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• v.53 no.1
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• pp.109-112
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• 2015

Diphyllobothrium latum and Diphyllobothrium nihonkaiense are morphologically similar to each other, and only genetic method can differentiate clearly between the 2 species. A strobila of diphyllobothriid tapeworm discharged from a 7-year-old boy was analyzed to identify the species by mitochondrial cytochrome c oxidase subunit 1 (cox1) gene sequencing. He and his family (total 4 persons) ate slices of 3 kinds of raw fish 16 days before visiting our outpatient clinic. All family members complained of abdominal pain and watery diarrhea. They all expelled tapeworm strobilae in their stools. They were treated with a single oral dose of praziquantel and then complained of no more symptoms. The cox1 gene sequencing of the strobila from the boy revealed 99.9% (687/688 bp) similarity with D. nihonkaiense and only 93.2% (641/688 bp) similarity with D. latum. Thus, we assigned this tapeworm as D. nihonkaiense. This is the first report of D. nihonkaiense infection in a family in Korea, and this report includes the 8th pediatric case in Korea. The current report is meaningful because D. nihonkaiense infection within a family is rare.

• Journal of environmental and Sanitary engineering
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• v.7 no.1
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• pp.1-16
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• 1992

Corrosion of pipes Is one of the most serious problems in the maintenance of water worlds. Corrosion is promoted not only by physical factors such as temperature, but also by electrochemical factors including concentration of soluble metal ions, chlorine ion, pH, DO and microorganisms. Corrosion products also affect corrosion rate. In this research, study results are summarized as follows ; 1) Corrosion test was performed for 4 weeks at $70^{\circ}C$, pH 7.0 with specimens of 4 types of metal materials used as service pipes. Corrosion rate and S.E.M were analyzed. The results were showed that corrosion 1.ate of carbon steel pipe was 4.10~5.22 $mg/\textrm{cm}^2$ . week, galvanized steel pipe 0.98~1.34$mg/\textrm{cm}^2$. week, Copper pipe 0.02~0.04$mg/\textrm{cm}^2$. week, stainless steel pipe 0.05~ 0.10$mg/\textrm{cm}^2$ . week. 2) When corrosion rate was tested for tile types of pipes at pH 7 and both $25^{\circ}C$ and $75^{\circ}C$, avaerage corrosion rate for 6 weeks at $25^{\circ}C$ Ivas 2.26$mg/\textrm{cm}^2$ . week in carbon steel pipe, 1.99$mg/\textrm{cm}^2$. week in galvanized steel pipe, 0.26 $mg/\textrm{cm}^2$. week in stainless steel pipe. At $87^{\circ}C$, average corrosion rate for 4 weeks u.3s 4.56 $mg/\textrm{cm}^2$. week in carbon steel pipe,

• ETRI Journal
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• v.30 no.1
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• pp.68-80
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• 2008

Since many efficient algorithms for implementing pairings have been proposed such as ${\eta}_T$ pairing and the Ate pairing, pairings could be used in constraint devices such as smart cards. However, the secure implementation of pairings has not been thoroughly investigated. In this paper, we investigate the security of ${\eta}_T$ pairing over binary fields in the context of side-channel attacks. We propose efficient and secure ${\eta}_T$ pairing algorithms using randomized projective coordinate systems for computing the pairing.

• Journal of the Korean Mathematical Society
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• v.45 no.4
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• pp.1057-1073
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• 2008

We present an explicit Eta pairing approach for computing the Tate pairing on general divisors of hyperelliptic curves $H_d$ of genus 2, where $H_d\;:\;y^2+y=x^5+x^3+d$ is defined over ${\mathbb{F}}_{2^n}$ with d=0 or 1. We use the resultant for computing the Eta pairing on general divisors. Our method is very general in the sense that it can be used for general divisors, not only for degenerate divisors. In the pairing-based cryptography, the efficient pairing implementation on general divisors is significantly important because the decryption process definitely requires computing a pairing of general divisors.

• Korean Journal of Computational Design and Engineering
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• v.8 no.1
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• pp.10-18
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• 2003

FEM (Finite Element Method) is a fundamental numerical analysis technique in wide spread use in engineering application. As the solving time occupies small portion of entire FEM analysis time because of development of hardware, the relative lime to the whole analysis time to make mesh mod-els is growing. In particular, in the case of stiffeners such as features attached to plate in ship structure, the line constraints are imposed on mesh model together with other constraints such as holes. To auto-matically generate two dimensional quadrilateral mesh with the line constraints, an algorithm is pro-posed based on the constrained Delaunay triangulation and Q-Morph algorithm in which the line constraints are not considered. The performance of the proposed algorithm is evaluated. And some numerical results of our proposed algorithm ate presented.

• Journal of the Korean Society of Clothing and Textiles
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• v.19 no.6
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• pp.968-983
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• 1995

In the field of psychology of clothing and fashion marketing, there have been many studies on clothing behavior but have been poorly catgorized according to the characteristics of variables. The author reviewed 120 recent studies on clothing varaibles published in Korea and grouped the variables into three categories. They are 1) the clot, ting atitude variables that consistently influence the Personal clothing behavior; 2) the market variables that are inherent to the market itself; and 3) the clothing consumer behavior uapiables that ate most related to the clothing consumer behavior. In this study the author surveyed and found that the following 9 major clothing attitude variables had been most frequently studied, including practicality, economy, modesity, aesthetics, fashionability, conformity and individuality, status symbolism, importance, and satisfaction. Two other categories will be reported in the following papers.

• Journal of the Korean Operations Research and Management Science Society
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• v.26 no.4
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• pp.71-82
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• 2001

Using the computer simulation method, we invest19ate the probability distribution of maximum eigenvalue of pair-wise comparison matrix, which has been used as a parameter for measuring the consistency of responses in analytic hierarchy process (AHP). We show that the shape of the distribution of the maximum eigenvalue is different according to the dimension of the matrix. In addition, we cannot find any evidence that the distribution of the Consistency Index is a Normal distribution, which has been claimed in the Previous literature. Accordingly, we suggest using so called K-index calcu1ated based on the concept of cumulative distribution function lather than based on that of arithmetic mean because the probabilistic distribution cannot be assumed to be a Normal distribution. We interpret the simulation results by comparing them with the suggestion of Saaty[11]. Our results show that using Saaty＇s value could be too generous when the dimension of the matrix is 3 and strict over 4. Finally, we propose new criteria for measuring the response consistency in AHP.

• Fisheries and Aquatic Sciences
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• v.7 no.2
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• pp.84-89
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• 2004

Feeding habits of Sillago japonica collected from in an eelgrass (Zostera marina) bed in Jindong Bay, Korea were studied. S. japonica was a carnivore which consumed mainly gammarid amphipods, polychaetes, bivalves, caridean shrimps and crabs. Its diets also included a small amount of fishes, copepods and caprellid amphipods. The diet of S. japonica underwent significant size-related changes; small individuals (<5cm SL) fed mainly on gammarid amphipods and crab larvae, while proportion of polychaetes and bivalves increased with increasing fish size and gammarid amphipods were also important prey for medium size individuals (5.1-9.9cm SL). The large individuals (>10cm SL) ate polychaetes, caridean shrimps and crabs. The dietary breadth of S. japonica were varied with size. The diet of S. japonica also underwent seasonal changes that could be related to differences in prey availability; gammarid amphipods were mainly consumed in spring and polychaetes in summer.