• Korean Journal of Poultry Science
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• 제46권1호
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• pp.25-30
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• 2019

This study was conducted to investigate basic data of development for appropriate management system in broiler. Data such as ages at marketing, livability, body weight, etc. were collected from a total of 53 broiler farms located in Chungnam, Chungbuk, Jeollanam, Jeollabuk, Gyeongbuk. 1. Average of ages at marketing were 32 days. Those of windowless house and open-type house were 31.96 and 32.03 days, respectively. The significant difference among four seasons was highly found (P<0.001). The longest ages at marketing were 32.86 days in winter. Average of livability was 96.25%. According to type of chick house, those of windowless house and open-type house were 95.93% and 96.59%, respectively. The livability according to season showed significant difference (P<0.05). The highest livability was 97.39% in autumn. However, the lowest livability was 95.36% in summer. 2. Average body weight at marketing was 1.62 kg. The significant difference was found in marketing weight by season (P<0.05). The heaviest body weight was 1.65 kg in winter, but the lowest weight was 1.60 kg in summer. Average of FCR was 1.62. the significant differences according to the season were highly found (P<0.01). Especially, the best FCR was 1.59 in autumn. Average cycles of marketing was 5.70. The significant differences according to farms size were found (P<0.05), cycles of small farms and big farms were 5.8 and 5.3, respectively. The ages at marketing were highly correlated with marketing weight (r=0.684) and feed conversion (r=0.439). The correlation between feed conversion and livability was highly negative (r=-0.614). According to the above result, livability and body weight at marketing were badly detected in summer. In conclusion, broiler farms should be controlled through properly environmental management system for improvement of performances.

• 대한공업교육학회지
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• 제44권1호
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• pp.94-113
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• 2019

This study has been performed for the purpose of providing the basic pedagogical resources to the specialized and meister high school related educational settings in either constructing educational contents suitable for the students'technological thinking disposition or fortifying the disposition required for the students.. A tool of secured validity and reliability has been used to test technological thinking disposition for the specialized and Meister high school students. Followings are the major results of the survey analysis for the subjects. 1. Technological thinking disposition with the most component ratio for the specialized & meister high school was turned out to be Technological Operating Disposition(TOD). The second most was Technological Planning and Reflecting Disposition(TPRD). Technological Curiosity Disposition(TCD), Technological Problem Identifying and Resolving Disposition (TPIRD), Technological Analyzing Disposition(TAD), Technological Creativity and Expressing Disposition(TCED) were in sequence. 2. In comparing the technological disposition of specialized high school students with that of meister high school students, the statistical test showed no evidence for the difference between the two group. 3. Statistical comparison test for the gender difference in technological thinking disposition has also been performed for the students of specialized and meister high school. The result showed that the magnitude of difference between the component ratio of TCD and TPIRD for the boy students was bigger than that for the girl students. In the TPRD, the component ratio for the disposition of the girl students was bigger than that of the boy students on the other hand. 4. For the comparison test of the technological thinking disposition between boys and girls only for the specialized high school students, the results showed the same different component ratio results as the results of the test for the specialized and meister high school students. 5. For the gender difference of meister high school student for the technological thinking disposition, there was no statistical evidence supporting the difference.

• 대한공업교육학회지
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• 제44권1호
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• pp.23-51
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• 2019

The purpose of this study was to analysis school dropout of specialized vocational high school students using phenomenological research method. The interview for the research was carried out with 10 adolescents who dropped out specialized vocational high school from December 8 to 23, 2018. According to the result of the research, 31 themes were extracted from interviews with 10 research participants. And 10 theme clusters were categorized from these. And these clusters were divided into 3 domains : 'before school dropout', 'causes & process of school dropout, feeling about school dropout', 'after school dropout' Based on the finding of the study, major conclusions of this study were as follow: First, adolescents who dropped out specialized vocational high school suffered from hard school life, disappointing lead from teachers, stereotypical lesson. And they committed misdeeds, and had psychological difficulties. Some of them kept up the good relationship with their friends, teachers, parents, some of them did not. Some of them kept up the good relationship with their friends, teachers and parents, while some of them did not. Second, they chose dropout due to various different causes. The procedures of school dropout proceeded with comparative ease. The effect of dropout prevention program is very limited. The feeling they felt at the time of school dropout varied individually. Some adolescents who dropped out specialized vocational high school were satisfied while others were stressed out, regretting their decision. Third, they lived diligently working part-time jobs or preparing General Equivalency Diploma (GED) test after dropout. They experienced positive changes in their daily lives after dropout. But sometimes they experienced various difficulties and negative changes. Most of them had their goals, and they were preparing for them. Their expectation was low that their life will succeed if they returned to school. They wanted people to understand their decision about dropout. And multiple institutions are supporting adolescents who dropped out specialized vocational high school. They need practical support : Various information, activity for career experience, counseling etc.

• Journal of agriculture & life science
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• 제52권6호
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• pp.49-60
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• 2018

Here, we reported 159 varieties of major cultivars using grapevine genetic resources to identify the resistant grape ripe rot cultivars. To do this, we performed pathogenicity assays from these grape cultivars by inoculating Colletotrichum acutatum and Colletotrichum gloeosporioides. Genotyping-by-sequencing(GBS) method was also used to compare genetic diversity among grape varieties. As a result, leaves inoculated with C. acutatum showed that 58 cultivars were susceptible, while 17 cultivars were resistant. In the case of C. gloeosporioides, 34 cultivars were found to be susceptible, while 25 cultivars were resistant. The 8 cultivars that showed resistance to both species were 'Agawan', 'Huangguan', 'Xiangfei', and 5 other cultivars from the hybrids of European and American species. Most of the varieties such as 'Emerald Seedless', 'Tano Red', and 'Rem 46-77(Aestivalis GVIT 0970)' originated in European species were identified as susceptible. These results can be used in the effective management of grape disease. In addition, these findings provide information for the development and cultivation of resistant to grape ripe rot disease cultivars.

• The Korean journal of helicobacter and upper gastrointestinal research
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• 제18권4호
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• pp.247-257
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• 2018

Background/Aims: The aim of this study was to analyze the trend of the prevalences of atrophic gastritis (AG) and intestinal metaplasia (IM) from 2011 to 2016~2017 in Korea. And, the risk factors of AG and IM were compared between 2011 and 2016~2017. Materials and Methods: A total of 4,023 subjects in 2011 and 2,506 subjects in 2016~2017 were enrolled. AG and IM were diagnosed on the basis of endoscopic findings. Multivariate analysis was performed for risk factors of AG and IM. Seventeen factors were analyzed. Results: The seroprevalence of Helicobacter pylori decreased from 2011 (59.8%; 2,407/4,023) to 2016~2017 (51.6%; 1,293/2,506; P<0.001). The prevalence of AG decreased from 2011 to 2016~2017 (P=0.018), but that of IM increased (P<0.001). The risk factors of AG in 2011 were male sex, old age, H. pylori immuoglobulin G (IgG) positivity, family history of gastric cancer (GC), and high-salt diet. For IM in 2011, the risk factors were male sex, old age, H. pylori IgG positivity, and family history of GC. Risk factors of AG in 2016~2017 were old age, H. pylori IgG positivity, and country of residence. For IM in 2016~2017, the risk factors were male sex, old age, family history of GC, high fasting glucose level (${\geq}126mg/dL$), H. pylori IgG positivity, and low income level. Conclusions: The difference in prevalence trends of AG and IM between 2016~2017 and 2011 could be the result of the different risk factors of AG and IM, such as decreased prevalence of H. pylori infection.

• ANNALS OF ANIMAL RESOURCE SCIENCES
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• 제29권4호
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• pp.150-157
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• 2018

The Zygote arrest 1 (ZAR1) gene is known to affect early embryonic development in various vertebrates. In this study, we performed the association analysis to check whether there is any significant relationship between semen kinematic characteristics and the ZAR1 gene. To determine semen kinematic characteristics, we measured motility (MOT), straight-line velocity (VSL), curvilinear velocity (VCL), average path velocity (VAP), linearity (LIN), straightness (STR), amplitude of lateral head displacement (ALH), and beat cross frequency (BCF) of spermatozoa in boars. In order to detect single nucleotide polymorphisms (SNPs), we extracted genomic DNA from multiple Duroc boars, and then subsequently used them in sequencing reactions. As a result, three SNPs were detected in the intronic region of ZAR1 gene (g.2435T>C in intron 2, g.2605G>A and g.4633A>C in intron 3 ). SNPs g.2435T>C and g.2605G>A were significantly associated with MOT (p<0.01) and VSL (p<0.05), and g.4633A

• Cross-Cultural Studies
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• 제52권
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• pp.133-164
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• 2018

This purpose of this paper is to focus on anti-Japanese literature and pro-Japanese literature skills among Korean literary history written in Japan, and to observe the differences between Korean and Japanese perception surrounding anti-Japanese and pro-Japanese literature. Analyzed texts are "Taste Korean Literature" by Saegusa Dosikatsu and "The Footsteps of Modern Literature of Chosun" by Shirakawa Yutaka, the earnest modern Korean literary historians written from the perspective of Japanese writers, and though there's no overall written history of literature, they were seen through with the perspective of Omura Masuo, at the forefront of Japanese researchers in modern and contemporary Korean literature. The main results of the review are as follow: First, In Korean literary history by Japan, the frame "pro-Japanese literature" is clearly embedded. It is clearly distinctive from the aspect of China or North Korea, and though it follows the narration system of South Korean literature, it also forms the breaking (turning) point of anti-Japanese and pro-Japanese literature relative to anti-Japanese and pro-Japanese literature. Second, even if it follows the narration system of South Korean literature, that question was constantly raised on existing Korean academic evaluation of anti-Japanese and pro-Japanese literature, and different interpretations of reading were practiced. For example, Korean academic circles highly regard literature of writers such as Kim, Jong han or Lee, Seok hoon, while Korean academics do not place much importance on Lee, Gwang Soo's pro-Japanese elements that are important. The third point is that generous marks are credited to writers with outstanding Japanese or to Japanese creative writing. As a result, they dissolve internal logic in different pro-Japanese collaborators such as Chang, Hyuk Ju, Kim, Sa Ryang, Lee, Seok hoon, or Kim, Yong Jae by melting the same "Japanese literature" in a cage. The last point is reading different inner thoughts of Kim, Jong-han or Lee, Seok-hoon unlike outspoken pro-Japanese collaborators such as Lee, Gwang soo, Jang, Hyuk Joo or Kim, Yong je. These points require more in-depth analysis, and will be continued in follow-up tasks.

• The Korean Journal of Vision Science
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• 제20권4호
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• pp.561-568
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• 2018

Purpose : The size and regular array of the collagen fibers in the corneal stroma have very close correlation with transparency. Simulation was carried out to investigate the change of light transmittance according to the array structure and collagen fiber layer thickness. Methods : The collagen fibers in corneal stroma were arranged in regular hexagonal, hexagonal, square and random shapes with OptiFDTD simulation software, and the light transmittance was analyzed. In square array, the light transmittance according to the density change was confirmed by when the number of collagen fibers in the simulation space was the same and the light transmittance was examined when the number and density of collagen fibers were changed. Results : When the number of collagen fibers is the same, the density becomes smaller and the thickness of the fibrous layer becomes thicker in order of arrangement of square, regular hexagonal, random and hexagonal. As a result of measuring the light transmittance by changing the array structure, the light transmittance measured at the detector at the same position was almost similar regardless of the array structure. In the detectors D0, D1, D2 and D3, the maximum transmittance is shown in square, hexagonal and square, regular hexagonal and regular hexagonal array structure, and the minimum transmittance is hexagonal, random, hexagonal and square, and square array structure. However, the difference between the maximum transmittance and the minimum transmittance was almost the same within 1%. When the number of collagen fibers was the same, the light transmittance of the rectangular array structure decreased with increasing fiber layer thickness. And as the thickness increased, the light transmittance decreased more when the number of collagen fibers decreased. Conclusion : Even though the collagen array structure changed, the light transmittance is almost similar regardless of the arrangement structure. However, as the array structure was changed, the thickness of the collagen fiber layer changed, and as the thickness increased, the light transmittance decreased. In other words, the transparency of the corneal stroma is more closely related to the thickness of the fibrous layer than the array of collagen fibers.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• 제32권1호
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• pp.16-31
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• 2019

Objective : The purpose of this study is to analyze the charcateristics of inpatients in Ophthalmology, Otolaryngology & Dermatology Clinic by gender, age, season, and department of medical care after hospitalization from March, 2012 to February, 2018. Method : From March 1, 2012 to February 28, 2018, patients who were admitted to the Ophthalmology, Otolaryngology & Dermatology Clinic of Korean Medical Hospital were classified by gender, age, department, and season, and their relationship, hospitalization period, number of outpatient visits Differences were analyzed objectively using various statistical methods using IBM SPSS 18.0. Results : 1. The number of inpatients was 432, including duplication. Of these, 317 were female and 115 were male. The number of female patients was 2.8 times higher. 2. The average age of the inpatients was 43.9 years and the number of middle-aged 40-50 patients was 48.6%. 3. The number of inpatients in the departments was in the order of dermatology, otology, laryngology, rhinology, and ophthalmology. The most hospitalized diseases were eczema in the dermatology department, sudden hearing loss in the otology department, tonsillitis/peritonsillar abscess, rhinitis in the rhinology department, and dry eye syndrome in ophthalmology. 1) The effect of gender on the difference in the number of inpatients by subdivision was statistically significant. 2) The effect of age on the difference in the number of inpatients by subdivision was statistically significant. 3) The effect of seasons on the difference in the number of inpatients was not statistically significant. 4. The number of inpatients by season was in the order of winter, spring, summer, autumn, and the number of inpatients decreased significantly in autumn. 1) The effect of gender on the difference in the number of hospitalized patients by season was not statistically significant. 2) The effect of age on the difference in the number of hospitalized patients by season was not statistically significant. 5. The average length of hospital stay for inpatients was 10.7 days. 1) The effect of gender on length of hospital stay was not statistically significant. 2) The effect of age on hospital stay was not statistically significant. 3) The effect of the subdivision on hospital stay was statistically significant. 4) The effect of the season on hospital stay was not statistically significant. Conclusion : As a result of this study, the most distinctive feature of the present study was the high rate of inpatients with otic disease like idiopathic hearing loss and Meniere 's syndrome and the high rate of female patients. This may be related to the increased prevalence of the disease and the severity of the disease. In addition, the high rate of female patients suggests that women are more likely to be affected by illnesses, as well as to have more medical use and severe symptoms requiring hospitalization. In the future, it would be better to provide various treatment plans and policies for patients with otic diseases and female patients. Also it would be good if studies on these fields are made in the future.

• Korean Journal of Poultry Science
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• 제45권4호
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• pp.253-260
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• 2018

The hepatocyte nuclear factor 4 alpha ($HNF4{\alpha}$) gene is related to lipid transport, including abdominal fat and growth, in chickens. Interestingly, the A543G SNP within the $HNF4{\alpha}$ gene has previously been reported to be associated with body weight in both broilers and Korean native chickens (KNCs). However, its exact position within the HNF4 is not yet reported. This study aimed to identify the position of the A543G SNP and to identify additional SNPs that can be used as genetic markers in KNCs. A total of 128 KNCs were used for the sequencing and analysis of these genetic associations. As a result, A543G SNP was located in intron 4 of the $HNF4{\alpha}$ gene; it is reported as rs731246957 in the NCBI database. Fourteen SNPs were detected in the sequenced portion of the $HNF4{\alpha}$ gene; three of these, rs731246957, rs736159604 and new SNP, intron 6 (249), were significantly related with growth in the chickens. In this study, the TT genotype of rs731246957, previously reported as A543G SNP, the GG genotype of rs736159604 and GT of new SNP have are highly associated with body weight from birth to 40 weeks of age in KNCs (P<0.01). These results suggest that rs736159604, rs731246957 and intron 6 (249) SNPs within the $HNF4{\alpha}$ gene could function as growth-related markers in the selective breeding of KNCs.