• 대한치과기공학회지
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• 제42권4호
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• pp.362-371
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• 2020

Purpose: The following study seeks to ascertain the motivations behind students' academic major selection and to identify the obstacles they encounter in the transition to university life, with the objective of providing information necessary to adapt well to the university and the course. Thereby, we aim to supply basic resources needed in the development of a university adaptation program to prevent academic dropout. Methods: Between October 1, 2019 and November 29, 2019, a self-administered questionnaire was distributed to a study sample consisting of students currently attending dental technology courses in Gangwondo and Gyeonggido. A total of 474 (94.8%) responses to the questionnaire were received and used for the final analysis. Results: Factors including major selection motivation, intrinsic motivation (p<0.001), academic adjustment (p<0.001), social adjustment (p<0.01), and institutional adjustment (p<0.05) all had negative relationships with academic dropout intention. Personal-emotional adjustment (p<0.001), however, showed a positive relationship with dropout intention. The explanatory power of the model was found to be 50.0%. Conclusion: This research shows that intrinsic motivation and personal-emotional adjustment diminish academic dropout intention. Therefore, it is recommended that diverse postenrolment course-adjustment programs should be developed to improve students' confidence in their choice of study, their adjustment to the course, and their level of satisfaction.

• 지질공학
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• 제30권4호
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• pp.497-514
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• 2020

본 연구는 강원도 삼척시 소재의 삼도 석회석광산에서 발생한 채굴공동 상부의 대규모 지반침하지를 대상으로 그 발생원인을 규명하는데 있다. 현장에서 채광, 측량도면 및 지질도 등을 토대로 지반침하지 인근의 갱도 및 산사면 붕괴지에 대한 지질조사 및 전기비저항탐사를 수행하였으며, 그 결과들로부터 지질공학적 평가를 수행하고 다양한 경험식과 수치해석 방법에 의해 지반침하의 원인을 분석하였다. 해석 결과로부터 다양한 불연속면이 발달한 불안정한 지반 내에서 채굴공동의 폭이 넓고 불규칙한 Pillar 설치로 인하여 오랜 기간 동안 채굴적 천단부 및 Pillar가 점진적으로 이완되면서 지반응력의 증가로 단층면을 따라 붕락되어 지반침하가 발생된 것으로 판단된다.

• 한국보육지원학회지
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• 제17권6호
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• pp.149-168
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• 2021

Objective: The purpose of this study was to analyze the structural relationship between fathers' involvement in parenting, mother's parenting stress and smartphone addiction, and children's smartphone addiction. Methods: The subjects of this study were 327 children aged between 3 and 5 who were attending nurseries and kindergartens in Gyeonggido, Gangwondo, and Busan, South Korea, and their mothers, fathers, and teachers. The data collected from the subjects were analyzed based on correlation analysis and structural equation modeling. Results: First, the fathers' involvement in parenting had a direct effect on their children's smartphone addiction, and no direct effect on the mother's parenting stress and smartphone addiction. Second, the mother's parenting stress had a direct effect on the mother's smartphone addiction and direct and indirect effects on their children's smartphone addiction. Third, the mother's smartphone addiction had a direct effect on their children's smartphone addiction. Conclusion/Implications: The findings in this study suggest the fathers' involvement in parenting and the mother's parenting stress and smartphone addiction have effects on their children's smartphone addiction. Based on these results, the study proposed ways to prevent children's addiction to smartphones and provided suggestions for further research.

• 현장농수산연구지
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• 제24권1호
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• pp.29-35
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• 2022

This study was conducted to investigate the seed storage method and seed germination characteristics of Synurus deltoides (Ait.) Nakai, a kind of wild vegetables. Several parameters affecting seed germination, such as germination temperature, chilling duration, imbibition duration, and storage method were evaluated. The seed germination of Synurus deltoides showed the highest germination rate (GR), promptness index (PI), germination performance index (GPI), mean daily germination (MDG) at 25℃. This implies that the optimum germination temperature was 25℃. And also, Seeds stored at -4℃, after 150 days showed relatively high germination rate about 98%. Therefore, The optimum germination temperature of Synurus deltoides was 25℃ and to increase the germination rate over 98% of Synurus deltoides, cold-wet storage 20 days treatments at 4℃ were effective in the improvement of seed germination.

• 식물병연구
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• 제28권3호
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• pp.162-165
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• 2022

Foot rot symptoms were repeatedly observed on plants of deltoid synurus (Synurus deltoides) growing in a field of the Wild Vegetable Research Institute located in Pyeongchang, Korea during disease surveys in July 2020 and June 2021. The symptoms appeared as wilting of the plant leaves, and the plant stems and petioles at or above the soil line turned dark and rotted. The incidence of diseased plants in the field was 5-10%. Five isolates of Phytophthora sp. were obtained from lesions of the diseased plants and investigated for their morphological and molecular characteristics. All the isolates were identified as Phytophthora cryptogea based on the morphological and molecular characteristics. Three isolates of P. cryptogea were tested for pathogenicity on deltoid synurus plants using artificial inoculation. All the tested isolates caused foot rot symptoms on the inoculated plants. The symptoms were similar to those observed in plants from the field investigated. To our knowledge, this is the first report of P. cryptogea causing Phytophthora foot rot in deltoid synurus.

• 식물병연구
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• 제29권1호
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• pp.72-78
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• 2023

In September 2021, gray-to-brown discoloration and expanding water-soaked lesions were observed on the outer and inner layers and the core of kimchi cabbage (Brassica rapa subsp. pekinensis) in fields located in Samcheok, Gangwondo, Korea. A bacterial strain designated as KNUB-02-21 was isolated from infected cabbage samples. Phylogenetic analysis based on the sequences of the 16S rRNA region and the dnaX, leuS, and recA genes confirmed that the strain was affiliated with Pectobacterium versatile. Additionally, the biochemical and morphological profiles of the isolate were similar to those of P. versatile. Based on these results, the isolate was identified as a novel strain of P. versatile. Healthy kimchi cabbage slices developed soft rot upon inoculation with P. versatile KNUB-02-21 and exhibited symptoms similar to those observed in the diseased plants in fields. The re-isolated strains were similar to those of P. versatile. Prior to our study, P. versatile as the causative pathogen of kimchi cabbage soft rot had not been reported in Korea.

• 동의생리병리학회지
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• 제21권1호
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• pp.322-327
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• 2007

The purpose of this study was to investigate the change of female's Bone Mineral Density after taking herbal medicine. We examined age, sex, marriage, alcohol, smoking, and job of 76 female and their life style related with Osteoporosis. Bone Mineral Density was examined after 1 month (one herbal medicine), 2 months (two herbal medicine), and 3 months (three herbal medicine) between Group I (taking pear extract) and Group II (taking herbal medicine). Bone Mineral Density of Group II after 1 month was increased, but insignificant. Bone Mineral Density was not significantly different between the Group I and Group II after 2 and 3 months. In this study, we can conclude that Bone Mineral Density was increased after 1 month of taking herbal medicine. But we had inaccurate results due to limitations of this study: period of test, accuracy of instrument, impossibility of use young antlers of the deer, and etc. More detailed study should be conducted to yield more concrete results.

• 대한수의학회지
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• 제51권4호
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• pp.267-275
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• 2011

Methicillin-resistant Staphylococcus (S.) aureus (MRSA) is one of the most important nosocomial pathogens worldwide and the emergence of this strain has become a major clinical problem. In this study, we investigated the prevalence of MRSA and their genetic characteristics in 69 S. aureus isolated from humans and animals. In human isolates, higher antimicrobial resistance rates were observed against penicillin (80.6%), followed by erythromycin (11.9%) and tetracycline (9.0%). All of them were susceptible to clindamycin, enrofloxacin, novobiocin, pirlimycin, trimethoprim/sulfamethoxazole and vancomycin. The resistance patterns in animal isolates were similar to those of human isolates. Two (2.9%) MRSA strains were isolated from human (n = 1) and animal (n = 1), and these isolates were confirmed as carrying the mecA gene. One isolate originating from human was resistant to 7 drugs and the other isolate derived from animal was resistant to 11 drugs. Staphylococcal cassette chromosome mec (SCCmec) variant IIIB was identified in animal isolate but SCCmec type of an isolate from human was not exactly determined. Two MRSA isolates showed unrelated PFGE pattern between them. Our results indicated although the frequency of MRSA isolates from humans and animals was low, a continuous surveillance and monitoring should be called for to prevent the contamination and spread of MRSA in the community. To our knowledge, this is the first time that SCCmec type variant IIIB was detected from animals in Korea.

• 한국토양비료학회지
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• 제47권6호
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• pp.598-603
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• 2014

The level of nitrous oxide ($N_2O$), a long-lived greenhouse gas, in atmosphere has increased mainly due to anthropogenic sources, especially application of nitrogen fertilizers. Quantifying $N_2O$ emission in the agricultural field is essential to develop National inventories of greenhouse gases (GHGs) emission. The objective of this study was to develop emission factor to estimate direct $N_2O$ emission from agricultural field by measuring $N_2O$ emissions in the red pepper cultivating field from 2010 to 2012. Emission factor of $N_2O$ calculated from accumulated $N_2O$ emission, nitrogen fertilization rate, and background $N_2O$ emission was $0.0086{\pm}0.00043kg$ $N_2O-N\;kg^{-1}$ N resulted from three year experiment of the research sites. More extensive studies need to be conducted to develop $N_2O$ emission factors for other upland crops in the various regions of Korea because $N_2O$ emission is influenced by many factors including climate characteristics, soil properties, and agricultural practices.

• 한국산림과학회지
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• 제98권3호
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• pp.311-318
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• 2009

본 연구는 GIS를 이용하여 산림 바이오 에너지에 대한 공급 및 수요의 잠재량을 파악하고, 잠재지도 제작을 목적으로 하였다. 산림이 많고, 지리적으로 같은 위치에 해당하는 강원도 영동 지방 4개 시군(고성군, 양양군, 강릉시, 삼척시)을 연구 지역으로 선정하였으며, 수치 임상도의 임상과 영급정보, 통계연보의 가구수 정보를 GIS 자료 형태로 전환한 후 산림 바이오에너지의 잠재된 공급량과 수요량을 파악하였다. 숲가꾸기사업 계획을 기초로 가구수를 고려한 수요대비 잠재적 공급가능량은 약 3,144 Tcal로써, 시군단위에 상관없이 초과공급이 가능한 것으로 나타났으나, 강원도의 평균 수집률인 10%를 고려하면, 시의 경우 6%, 군은 15% 공급 가능한 것으로 나타났다. 한편, 수집률 변화에 따른 공급가능성을 비교한 결과, 60% 이상인 경우, 초과공급이 가능한 지역이 발생하였다.