• 대한지역사회영양학회지
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• 제12권5호
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• pp.592-605
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• 2007

Undernutrition could be a significant deterrent to healthy aging and could negatively affect health outcomes in elderly. This study aimed to assess health-related factors which are associated with nutritional risks in middle-aged and elderly individuals by a cross-sectional study. Interviews were conducted with 2660 subjects (847 males, 1813 females), aged 50 years and over, in 15 cities in Korea. Data on food intake were obtained through a validated semi-quantitative food frequency questionnaires. Nutritional status were analyzed according to health-related factors including cigarette smoking, alcohol drinking, exercise, stress and depression level. Less regular exercise was associated with a higher likelihood of a poor nutrition [odds ratio (OR) 1.94; 95% confidence intervals (CI) 1.43-2.65] of middle-aged and elderly male subjects. Cigarette smoking (OR 1.84; 95% CI 1.24-2.71), less exercise (OR 2.58; 95% CI 2.07-3.21), stress (OR 1.73; 95% CI 1.36-2.22), and depression (OR 1.34, 95% CI 1.08-1.67) of middle-aged and elderly female subjects was associated with a higher likelihood of a poor nutrition. The results of the multiple regression analysis showed that less exercise proved to be the strongest predictors for the poor nutrition, followed by stress, smoking, and depression (model $R^2= 9.0%$). It suggests that guidance to promote regular exercise, to quit smoking, to minimize stress and depression level might help to improve nutritional status of middle-aged and elderly in Korea. These findings also suggest that having recommendable health behaviors are beneficial to the good nutrition of subjects aged 50 years and over.

• 한국간호교육학회지
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• 제7권2호
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• pp.229-244
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• 2001

The purposes of this study are to do surveys of the state of health and dental health behaviors of higher grade students in elementary school and their mothers, to investigate the relationship of students' dental health, and to apply those results to the systematic and efficient dental health care. The subjects were totally 618 people, including 309 elementary school students in 4th, 5th, or 6th grades and their mothers in Pusan. The questionnaires were used as instruments, which were made by the researcher and related with other preceeding studies. The content validity of the instruments was tested by two professors of nursing. Dental checking were conducted by an expert of dental sanitation, according to the standard of the World Health Organization. The period of collecting data was 20 months from October 20th to December 20th in 2000 and the collected data were analyzed by SAS program and classified as the real number, the percentage, the mean, the standard deviation, t-test, and F-test. In conclusion, there is no significant correlation between grades and treated or treatment-needed permanent teeth. There is the highest significant correlation between treated or treatment-needed permanent teeth and students' dental health behaviors. There is high significant correlation between mothers' dental health behaviors and students' dental health behaviors. Also, There is significant correlation between mothers' state of dental health and students' state of dental health. From the results of this study, the students' dental health behaviors are the most important variables in the students' state of dental health. But both boys(9.48) and girls(9.97) get the low marks on the total mark 15 about brushing, which can be self-controlled. Therefore, the developments of dental health guidance in education about dental health by mothers or the educational courses in schools, such as brushing educations by the experts, dental health education, brushing after lunch, or the various equipments in brushing, should be accomplished. Above all, behavior-centered education should be conducted instead of knowledge-centered education.

• 한국생활과학회지
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• 제24권5호
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• pp.663-676
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• 2015

The purpose of this study was to examine whether any differences can be found in body comparison, body satisfaction, and appearance management behaviors according to the MBTI's typology among male and female adolescents in Gwangju and South Jeolla province, South Korea. It was conducted by a self-report survey of 534 male and female high school students in Gwangju and South Jeolla province. The collected survey data were analyzed by Means, Cronbach's ${\alpha}$, Factor analysis, and t-test using the SPSS/PC WIN 19.0 statistical program. The results were as follows: Introversion Type(I) teens tend to think a thinner body is closer to the ideal when compared to Extroversion type(E) students. They spend less time comparing their bodies with their peers. However, they usually have lower levels of body satisfaction and are more likely to be concerned about acne. Intuition Type(N) students tend to have a body figure that is a little plumper than Sensing Type(S) teens. They are inclined to try and lose weight and are concerned about acne. Sensing Type(S) students are more likely to compare their bodies with their peers than Intuition Type(N) teens. However, they are generally less satisfied with their bodies. Feeling Type(F) teens are more concerned with harmony and personal hygiene the Thinking Type(T) students. Judging Type (J) students generally want to be thinner than their current body type when compared with Perceiving Type(P) teens. When Judging Type(J) teens decide they need to be on a diet, they do their best to lose weight even if it means exercising and forgoing their favorite foods. These results indicate that it would be more effective to offer guidance to teens while taking into consideration their differences in terms of appearance management behaviors based on the MBTI Topology of Adolescents.

• Structural Engineering and Mechanics
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• 제53권2호
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• pp.311-324
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• 2015

The purpose of this study was to investigate experimentally the fatigue performance of reinforced concrete (RC) beams with hot-rolled ribbed fine-grained steel bars of yielding strength 500MPa (HRBF500). Three rectangular and three T-section RC beams with HRBF500 bars were constructed and tested under static and constant-amplitude cyclic loading. Prior to the application of repeated loading, all beams were initially cracked under static loading. The major test variables were the steel ratio, cross-sectional shape and stress range. The stress evolution of HRBF500 bars, the information about crack growth and the deflection developments of test beams were presented and analyzed. Rapid increases in deflections and tension steel stress occured in the early stages of fatigue loading, and were followed by a relatively stable period. Test results indicate that, the concrete beams reinforced with appropriate amount of HRBF500 bars can survive 2.5 million cycles of constant-amplitude cyclic loading with no apparent signs of damage, on condition that the initial extreme tensile stress in HRBF500 steel bars was controlled less than 150 MPa. It was also found that, the initial extreme tension steel stress, stress range, and steel ratio were the main factors that affected the fatigue properties of RC beams with HRBF500 bars, whose effects on fatigue properties were fully discussed in this paper, while the cross-sectional shape had no significant influence in fatigue properties. The results provide important guidance for the fatigue design of concrete beams reinforced with HRBF500 steel bars.

• 농촌지도와개발
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• 제1권1호
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• pp.37-45
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• 1994

This study was conducted to investigate the organizational climate of the agricultural extension education agencies and its influence on their educators` attitude toward job in Korea. The specific objectives of the study were 1) to identify the educators` perception of the organizational climate in the agricultural extension education agencies, and 2) to determine whether or not the educators` perception of the organizational climate influnce on their attitude toward job. Organizational climate has bees defined by many scholars as the properties of the social psychological environment perceived by organization members. There are various theoretical interpretations offered by die scholas about the effect of organizational climate upon organization members` behavior. Through a series of the theoretical reviews, this study could draw more than twenty variables in four types of organizational climate which might be perceived by the educators of agricultural extension education agencies and might influence upon their attitude toward job. The data were collected mainly through questionnaires sent to the responsible officers for administering the questionnaires for all adult educators of 30 agricultural extension education agencies randomly sampled from the population of 190 agencies. After data cleaning, a total of 629 responded questionnaires were analyzed for the study. The statistical methods used in the study were percentile, correlation, one way analysis of variance and multiple regression analysis. The two major findings of the study were as follows : 1. The organizational climate of agricultural extension education agencies were classified into four types : 1) democratic-autonomous, 2) cooperative-friendly, 3) achievement-oriented, and 4) bureaucratic-authoritarian. Among these of organizational climates, the cooperative-friendly one was most positively but the bureaucratic-authoritarian one was least positively perceived by the educators. 2. The educators` potion of the organizational climate and their attitude toward job were significantly correlated. The educators` perception of the organizational climate explained 41 percent of the variance of their attitude toward job in a multiple regression analysis In particular, the perception of the achievement oriented type of the organizational climates alone explained 34 percent of the variance of the favorable attitude.

• Macromolecular Research
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• 제11권5호
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• pp.334-340
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• 2003

In order to fabricate new sustained delivery device of nerve growth factor (NGF), we developed NGF-loaded biodegradable poly(L-lactide-co-glycolide) (PLGA, the mole ratio of lactide to glycolide 75:25, molecular weight: 83,000 and 43,000 g/mole, respectively) film by novel and simple sandwich solvent casting method for the possibility of the application of neural tissue engineering. PLGA was copolymerized by direct condensation reaction and the molecular weight was controlled by reaction time. Released behavior of NGF from NGF-loaded films was characterized by enzyme linked immunosorbent assay (ELISA) and degradation characteristics were observed by scanning electron microscopy (SEM) and gel permeation chromatography (GPC). The bioactivity of released NGF was identified using a rat pheochromocytoma (PC-12) cell based bioassay. The release of NGF from the NGF-loaded PLGA films was prolonged over 35 days with zero-order rate of 0.5-0.8 ng NGF/day without initial burst and could be controlled by the variations of molecular weight and NGF loading amount. After 7 days NGF released in phosphate buffered saline and PC-12 cell cultured on the NGF-loaded PLGA film for 3 days. The released NGF stimulated neurite sprouting in cultured PC-12 cells, that is to say, the remained NGF in the NGF/PLGA film at 37 $^{\circ}C$ for 7 days was still bioactive. This study suggested that NGF-loaded PLGA sandwich film is released the desired period in delivery system and useful neuronal growth culture as nerve contact guidance tube for the application of neural tissue engineering.

• 한국환경교육학회지:환경교육
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• 제20권2호
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• pp.54-66
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• 2007

The purpose of this study is to find identity of the elementary environmental education and inquire elements of professionalism in environmental education that elementary teachers should have. This study performed a half-structured interview in twice to the eight of elementary teachers who completed the environmental education curriculum course in a graduate school or participated in the teacher training program before. As a result, this study found that the identity of the elementary environmental education consists of the unification comprehending various subjects, the well-rounded sensitivity balancing intellectual, emotional and behavioral aspects, and the grounding in forming environmentally friendly living-habit and academic basis of environments. Moreover, this study found that the teacher training program for the specialty of the elementary environmental teachers should comprise of the following twelve components: the knowledge of overall environmental curriculum, environmental life guidance and environmental classroom management, environmental teaching skills and function, the passion and commitment about environmental education, environmental sensitivity, understanding of education studies, the values and attitude about environment, environmental behavior, understanding the relationship between environmental psychology and developing stage of child, the general education and communication/cooperation with colleagues or local community, understanding of the role as an teacher for the elementary environmental education. More importantly, it would be very crucial that the teachers themselves who are the main body of education system should recognize the their role as the professionals in order to improve the quality of education.

• Journal of Community Nutrition
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• 제3권1호
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• pp.21-29
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• 2001

This study was conducted to examine factors with attendance in hyperlipidemia nutrition eduction program among 101 hyperlipidemic outpatients (38 males 63 females) at Samsung Medical Center We employed the Health Belief Model (HBM) as the theoretical framework The individual nutrition education and counseling program was scheduled with 4- half hour session sin 2 to 4 weeks intervals. Upon initiation of the program a trained dietitian surveyed HBM constructs and psychosocial factors. The following were included perceived susceptibility to cardiovascular disease(CVD) perceived severity to CVD percieved benefits to diet modification perceived barriers to persistence in maintaining therapy and self efficicacy and social support from family Sociodemographic data health factors stress level nutrition knowledge, and 24-hour dietary recall behavior were also surveyed All these data was analyzed according to the number of nutrition sessions attended The subjects were 55.9$\pm$9.4 year old and 24.6$\pm$kg/㎡ Sociodemographic factors were not associated with the number of nutrition sessions attended HBM constructs and psychosocial factors were significantly associated with the number of nutrition sessions attended. According to Spearman correlation coefficients. From stepwis regression analyses using HBM constructs as independent variables perceive barriers to persistence in maintaining diet therapy (negative) proved to be the strongest predictors for the number of nutrition sessions attended (partial R$^2$= 72.3%) followed by perceived severity to CVD and self efficacy (model R$^2$=76.6% The findings indicate that HBM constructs and psychosocial factors were closely associated with patient attendance It suggests that information and guidance to minimize patients perceived barriers to diet therapy might help to improve patients to scheduled appointments in nutrition education programs.

• Journal of Nutrition and Health
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• 제41권4호
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• pp.365-373
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• 2008

This study examined the needs and practice willingness for the health promotion program of restaurant industry among Seoul residents. Using structured self-administered questionnaires, data on subjects' general characteristics, health status, and eating out behavior characteristics, the needs and practice willingness of the health promotion program for restaurant industry were collected from 765 adults above the age of 19. The needs for nutrition labeling such as fat, calorie, sodium, fiber, and the practice willingness for consuming nutrition labeled food were high. Results showed that gender, restaurant's management status, and food quality status were significant indicators for needs for health promotion program. Education duration, food quality status, and the frequency of eating out were significant variables for practice willingness. The results imply that health promotion program for the restaurant industry should be based on the consumer's characteristics. Also, the results imply the necessity of several activities such as social marketing to inform the benefit of participation in the health promotion program for consumers, guidance to maintain the food quality and improve the ambiance of restaurant for suppliers, and the new establishment of research centers to validate the labeled information on meals and analyze the nutrients of the meals for agencies.

• Steel and Composite Structures
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• 제33권1호
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• pp.37-66
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• 2019

In cold-formed steel structures, such as trusses, wall frames and portal frames, the use of back-to-back built-up cold-formed stainless-steel lipped channels as compression members are becoming increasingly popular. The advantages of using stainless-steel as structural members are corrosion resistance and durability, compared with carbon steel. The AISI/ASCE Standard, SEI/ASCE-8-02 and AS/NZS do not include the design of stainless-steel built-up channels and very few experimental tests or finite element analyses have been reported in the literature for such back-to back cold-formed stainless-steel channels. Current guidance by the American Iron and Steel Institute (AISI) and the Australian and New Zealand (gAS/NZS) standards for built-up carbon steel sections only describe a modified slenderness approach, to consider the spacing of the intermediate fasteners. Thus, this paper presents a numerical investigation on the behavior of back-to-back cold-formed stainless-steel built-up lipped channels. Three different grades of stainless steel i.e., duplex EN1.4462, ferritic EN1.4003 and austenitic EN1.4404 have been considered. Effect of screw spacing on the axial strength of such built-up channels was investigated. As expected, most of the short and intermediate columns failed by either local-global or local-distortional buckling interactions, whereas the long columns, failed by global buckling. All three grades of stainless-steel stub columns failed by local buckling. A comprehensive parametric study was then carried out covering a wide range of slenderness and different cross-sectional geometries to assess the performance of the current design guidelines by AISI and AS/NZS. In total, 647 finite element models were analyzed. From the results of the parametric study, it was found that the AISI & AS/NZS are conservative by around 10 to 20% for cold-formed stainless-steel built-up lipped channels failed through overall buckling, irrespective of the stainless-steel grades. However, the AISI and AS/NZS can be un-conservative by around 6% for all three grades of stainless-steel built-up channels, which failed by local buckling.