• Journal of Environmental Health Sciences
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• v.14 no.2
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• pp.13-27
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• 1988

Two asbestos slate manufacturing and seven asbestos textile plants in Korea were surveyed from May 20 to July 2, 1987. The purposes of this study were to evaluate 1) worker exposure to asbestos, 2) compliance to the standards and 3) the efficiency of existing local exhaust systems. Sixty-two personal samples and eighty-three area samples were collected and analyzed using "NIOSH 7400" method. Results of this study were as follows. 1. The asbesots exposure concentrations in asbestos textile plants were 1.3 - 14.3 fibers/cc(geometric mean(GM), 4.4 fibers/cc). 2. Worker exposure level to asbestos fiber in asbestos slate manufacturing industry was 0.21 fibers/cc during wet processing, which is below the Korean Standard of 2 fibers/cc. 3. Most local exhaust systems installed in asbestos textile plants were inadequately designed. 4. Ninety-six percent of the 145 samples exceeded the U.S. Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (PEL) of 0.2 fibers/cc and forty-nine percent of the samples exceeded the Korean Standatd of 2 fibers/cc.

• Journal of the korean academy of Pediatric Dentistry
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• v.11 no.1
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• pp.103-112
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• 1984

Eighty children, aged from 2 years 8 months to 5 years 1 month old, were examined to study the relationship between the preschool children's response at dental visit and the influencing factors. The results were as follows: 1, There was no significant relationship between the sexes and the children's response. 2. Children who experienced the painful dental treatment demonstrated significantly more negative dental response. 3. Children who stowed negative dental behavior at last dental visit demonstrated significantly more negative dental response. 4. Children of mothers with high anxiety scores demonstrated significantly more negative dental response. 5, Children who were unpleasant at hospitaization demonstrated significantly more negative dental response. 6. Children who thought they had dental problems demonstrated significantly the most negative dental response. 7. Children who abhorred the medical treatment demonstrated significantly more negative dental response.

• Journal of The Korean Association For Science Education
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• v.16 no.3
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• pp.227-238
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• 1996

This study primary aim is to investigate students' responses to experimental results which conflict with their preconceptions regarding electrical circuits. Eighty-eight students of both sexes were randomly selected from a science high school in Korea. They were questioned about their preconceptions regarding an electric circuit, and sixty-eight students with relevant misconceptions were selected. These students were presented with experimental results obtained by some other experimenter, and asked to interpret these results. The second aim of this study is to explore how students' responses vary according to the type of inquiry-skills required to obtain the result. To do this, two type of experimental results were developed: one obtained by observation and the other obtained by controlling variables. We found that many students doubted results for the simple reason that they conflicted with their preconceptions. They rejected results by mentioning other factors which could have affected the result, or simply by reiterating their preconceptions. This behaviour varied considerably by inquiry-skill type. 41% of students rejected conflictual result obtained by observation, but only 6% of students rejected results obtained by controlling variables.

• Journal of the Korean Home Economics Association
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• v.37 no.1
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• pp.79-89
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• 1999

Children's sex, temperament, and empathy were studied as antecedents of preschoolers' prosocial development. Eighty eight 5-, and 6-year-old children, 41 boys and 47 girls, were sampled in two kindergartens. Children's naturally occurring prosocial behaviors were videotaped in their classrooms for 21 minutes in 3 days. Teachers rated the children's prosocial tendency using a questionnaire. Empathy was measured individually with a picture/story measure, and mothers provided information on children's temperament using a questionnaire. The two measures of preschoolers' prosocial behaviors, teacher ratings and free play observations, were moderately related. Girls were more prosocial in terms of helping/sharing/cooperation in both teacher-ratings and free-play observations. Preschoolers' adjustability was moderately related to the prosocial behaviors of children in both teacher-ratings and observations. Boys' verbal empathy was related to the observed prosocial behaviors.

• Journal of the Korean Home Economics Association
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• v.44 no.1 s.215
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• pp.139-150
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• 2006

Eighty-four fabrics, all weaved from silk, were excavated from Kim Yeoon's tomb. They comprised 51 pieces of silk tabby, 13 of satin damask, 17 of twill, and 2 of complex gauze, 1 of damask on tabby. The fabrics featured high quality of satin, a uniquely patterned satin damask, various silk tabbies, and 3-end complex gauze. The names of the fabrics used in this article are based on literature sources and include silk tabby(紬), thin silk tabby(紬), filament silk tabby(絹), satin damask(段), complex gauze(羅), simple gauze(紗), and twill(綾).

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.8
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• pp.3313-3317
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• 2015

The purpose of this study is to describe the relationship between caregiver burden and perceived social support among caregivers of patients with cancer. The research was conducted in a university hospital in ${\dot{I}}zmir$, Turkey. Eighty patient relatives who provided care service to patients with cancer who were admitted at hematology and oncology clinics participated in the study. The findings indicated that the care burden score was mild level. The mean of the perceived social support score was $58.4{\pm}21.0$ supporting the conclusion that there is a weak and negative-direct relation between caregiver and perceived social support and that as the perceived social support increased, conversely, care burden decreased.

• Asian-Australasian Journal of Animal Sciences
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• v.20 no.3
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• pp.313-315
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• 2007

Seventeen haplotypes were detected from the complete mitochondrial DNA control region sequences analyzed from eighty individuals of two Tibetan domestic sheep breeds. The nucleotide composition of all the sequences was 33.0% A, 29.7%T, 22.9%C and 14.4%G; G+C was 37.3%. The length of the sequences ranged from 1,107 bp to 1,259 bp. The difference between them was primarily due to 3-5 copy numbers of a 75 bp tandem repeat sequence. The NJ phylogenetic tree (the number of replications of bootstrap test is 1,000) presented three major domestic sheep lineages, which suggested that modern Tibetan sheep breeds are derived from three maternal sources.

• Imaging Science in Dentistry
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• v.44 no.1
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• pp.31-35
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• 2014

Purpose: This study was performed to investigate the effect of image enhancement of periapical radiographs according to the diagnostic task. Materials and Methods: Eighty digital intraoral radiographs were obtained from patients and classified into four groups according to the diagnostic tasks of dental caries, periodontal diseases, periapical lesions, and endodontic files. All images were enhanced differently by using five processing techniques. Three radiologists blindly compared the subjective image quality of the original images and the processed images using a 5-point scale. Results: There were significant differences between the image quality of the processed images and that of the original images (P< 0.01) in all the diagnostic task groups. Processing techniques showed significantly different efficacy according to the diagnostic task (P< 0.01). Conclusion: Image enhancement affects the image quality differently depending on the diagnostic task. And the use of optimal parameters is important for each diagnostic task.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.3
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• pp.415-422
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• 1996

This study was conducted to evaluate the necessity of clinical nutrition education in the medical school curriculum. One hundred and eighty five medical school students, residents, nurses, and forty undergraduate students majoring in food science and nutrition were involved in this study. The survey included questions about nutritional knowledge, necessity of nutrition counseling, necessity of clinical nutrition and nutritional attitudes. The nutritional knowledge scores of the subjects in medical school and residents were significantly lower than those of the students majoring in food science and nutrition. Subjects of 91.3% strongly agreed to the necessity of nutrition counseling for patients ; 78.9% agreed that the present nutrition education in medical schools was inadequate. Most subjects (94.1%) agreed that clinical nutrition was an important field in the treatment of diseases. The medical profession is facing the challenges of the 1990s with the shift to outpatient care and preventative services. Clinical nutrition is an essential element in the process of curriculum change. The nutrition educator will be expected to take a leading role in integrating clinical nutrition into medical school curriculum.

• Proceedings of the Korea Society of Poultry Science Conference
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• 2001.11a
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• pp.49-51
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• 2001

Betaine functions as an osmoregulators in the cells and its inclusion can spare the choline, carcass fat reduction. Thus, two hundred eighty eight of seventy eight weeks old laying hens were fed with 0, 500, 1,000, 2,000 ppm betaine addition during the environmentally high temperature stress. Basal diets contained 16% CP and 2,800 ME. Egg production, feed intake, feed conversion were examined for eight weeks. Egg qualities, liver betaine, blood osmolarity, AntiDiuretic Hormone(ADH) were measured at the end experiment. Egg production of hens fed 500, 2,000 ppm dietary betaine and showed significance between control and 2,000 ppm betaine treatment(P＜0.05). ADH of blood sera tended to increase as dietary supplemental betaine increased. The results of this experiments indicated that dietary supplemental betaine was able to improve the performance, eggshell breaking strength, liver betaine in this experiment.