• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.69-69
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• 2020

식물체가 건조 스트레스를 받으면 각 기관 물질 생산의 변이, 분화 및 발달 억제를 통해서 식물의 생산활동을 현저히 저하시켜, 식물의 생장, 형태, 개체발생 및 대사생리에 영향을 미치는 것으로 연구되어 왔다. 최근 기후 온난화로 인해 온도가 점진적으로 상승하고 가뭄과 같은 이상기상이 빈번하게 발생함에 따라 많은 노지 작물의 농업 생산성이 약화되고 있다. 배추는 우리나라의 대표적인 식품 중 하나인 김치의 주재료로 연중 안정적인 생산과 공급이 필요시 되지만, 배추의 경우 건조 조건에서 엽육조직의 붕괴와 같은 생리장해가 발생되기 때문에 최근 발생되고 있는 이상 기후의 영향으로 안정적인 생산이 어려워지고 있는 실정이다. 하지만, 배추에서는 이상 기후에 대응이 가능한 내건성 품종의 육성을 위한 연구는 미흡한 실정이다. 따라서 본 연구에서는 내건성이 높은 배추 개발을 위한 기초소재를 찾는 것을 목적으로 농촌진흥청 유전자원센터에서 보존하고 있는 재래종 배추 30계통을 분양받아 강릉원주대학교 생명과학대학 내의 조직배양실을 이용하여 연구를 수행하였다. 배지는 Tissue Culture Square Dish(125×125×20mm)에 Agar를 녹여 40ml씩 분주하여 고체배지를 조성한 후, 건조 처리구 Polyrthylene glycol 6000(PEG) 0%(Control), 20%(Mild Stress), 30%(Severe Stress)를 설정하여 60ml씩 추가 분주하여 배양기 28℃에서 15시간 처리를 하였다. 분양받은 각 계통의 종자는 1% 차아염소산 나트륨으로 10분간 종자표면을 살균한 후, 5번 정도 멸균수로 헹군 후, 표면 살균한 재래종 종자를 고체배지 시험관에 6립씩 치상하였다. 식물체 생육은 각 처리구별 3반복으로 하였으며 주간 12시간 주기, 광도 2,400Lux, 온도 20℃의 조직배양실에서 치상 후 7일간 생육하였다. 치상 후 7일간 생육시킨 식물체를 채취하여 지상부생체중, 지하부 생체중, 뿌리 길이를 측정하였으며, 지상부와 지하부로 나누어 50℃에서 72시간 건조시킨 후, 건물 생산량을 조사하였다. 본 실험 결과 건조 처리(PEG-6000)는 배추의 생장을 저해하였지만, 생육 저해 정도는 계통간의 차이가 있는 것을 관찰할 수 있었으며 무처리구와 스트레스 처리구간의 생장량 변화 정도를 기반으로 군집분석을 수행한 결과 'IT110483'과 'IT104903' 계통이 실험에 공시된 계통들 중 상대적으로 강한 건조 내성을 가진 것을 확인할 수 있었다. 따라서, 재래종 배추 계통 중 일부는 건조내성이 강한 새로운 배추 품종을 육성하는데 있어 유용하게 이용될 수 있을 것으로 사료된다.

• Journal of the Korean Society of Radiology
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• v.13 no.3
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• pp.459-464
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• 2019

In order to minimize the radiation exposure dose of the thyroid site at dental cone-beam computer tomography, a protector using a Bolus was prepared, and the radiation shielding effect and the appropriateness of the image were evaluated. Using a dental cone-beam computed tomography (CBCT), a glass dosimeter was attached to the left and right sides of the thyroid for a dental radiation phantom, and the radiation dose was measured. The absorbed dose for each shield was measured by another method to 10 mm, 20 mm, and 30 mm-thickness, respectively. Eight evaluators evaluated whether or not the medical image is appropriate. When using a 30 mm Bolus shield at the left thyroid site, the resulting value is reduced by an average of $342.67{\mu}Gy$ by 20.7% from the average value of $431.22{\mu}Gy$ measured without using a Bolus shield, the right thyroid site In the case of using 30 mm Bolus shield, it showed a dose reduction effect of 21.9% with an average of $424.56{\mu}Gy$. The adequacy of the medical image was judged to be usable by both evaluators. In conclusion, the dental cone-beam computerized tomography can be used as a useful shielding material because it has a radiation shielding effect and it is possible to treat the diagnosis of the bolus protector in the thyroid without any obstruction shade in order to minimize the radiation dose.

• Parasites, Hosts and Diseases
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• v.30 no.3
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• pp.163-168
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• 1992

Hugot (1983), Hugot and Tourte-Schaefer (1985) reported that nematodes of the genus nnterobius causing human enterobiasis might be classified into two difEerent species on the basis of the size and shape of spicule in male worms. E. gregorii Hugot, 1983 has signif;cantly shorter spicules in males than those in E. vermicularis. A total of 194 male Enterobius were collected from 17 schoolchildren by anthelmintics at Wonju, Kangwon-do. The sizes of spicules and morphologies were comparatively observed. Two different types of spicules in male Enterobius were also observed in Korea. Out of 112 male worms observed, the percentages of E. gregorii (short-spicule type) and E. vermicularis (long-spicule type) were 23.2% and 76.8%, respectively.

• Journal of the Korean Geographical Society
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• v.36 no.5
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• pp.516-526
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• 2001

This study aims to reveal the capacity of impacts that the diffusion of networked computer in rural areas, or so-called rural telematics, has on regional development schemes. It is accomplished mainly by a case study of a small rural village near the city of Weonju, Korea, which has been recently designated as an information model village by the provincial government and given supports for information infrastructure. The case study shows that although the residents'computer use is confined to a very elementary level in every respect of using internet, e-mails, and visiting village portal site, there is high potential that extended use of networked computer would bring positive changes in life-styles and community formulation, and hence new possibilities of regional development. These positive moves will be possible by increasing economic, social and cultural benefits that the residents receive from using computer facilities. One of the important prerequisites is to transform external motivation to internal one and to lead the residents to a more active use of computers.

• The Journal of Engineering Geology
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• v.13 no.4
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• pp.475-490
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• 2003

The purpose of this study is to apply one of the geophysical methods, GPR to archaeology. Time slice of analysis method was used to interpret archaeological feature before excavation. Study areas are Pubcheonri burial mound group in Wonju, Songhakdong no. 1 tomb, Gosung in Kyungsangnamdo, and Yoshinogari 2 rows of jar-coffins burial in Saga Prefecture, Japan. We found a stone tomb, spreaded and piled stones from spoiled tombs of the Baekje Dynasty as archaeological features in Pubchonri, Wonju. Songhakdong no. 1 tomb in Gosung was the unique keyhole-shaped tomb in Kyungsangnamdo as we know. But we found that the tomb consists of 3 tombs and there are lots of stone tombs according to the GPR and excavation. From the GPR exploration and excavation, it turned out not be a keyhole-shape tomb. We also found jar-coffins burial in Yoshinogari, Japan. As a result GPR was very helpful to detect archaeological features and pattern before excavation in advance.

• Journal of the korean academy of Pediatric Dentistry
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• v.49 no.3
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• pp.340-347
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• 2022

Distal displacement of the tooth germ of the mandibular second premolar (MnP2) leads to its impaction and obturation of the eruption path of the mandibular first molar delaying its eruption. The present case report describes the treatment of 2 cases of eruption guidance for distally displaced developing MnP2 that caused delayed eruption of the mandibular first molar. Intentional extraction of primary predecessor results in the mesial shift of the displaced MnP2. However, unfavorable distal ectopic eruption of the mandibular first premolar after the premature loss of primary second molar has been previously reported. Hemisection and sequential extraction of the mandibular primary second molar were performed to mesially shift the distally displaced MnP2, while preventing unfavorable distal ectopic eruption of the mandibular first premolar.

• Journal of the Korean Recycled Construction Resources Institute
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• v.10 no.1
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• pp.40-47
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• 2022

In this study, the direction of the steel fibers mixed in the normal mortar and the steel slag mortar was arranged in the circumferential direction by using an electromagnetic field, and a double punch test was performed to evaluate the effect of magnetic filed exposure on tensile strength and on fracture energy. As a result of the experiment, it was confirmed that it is possible to arrange the steel fibers in the circumferential direction. Tensile strength and displacement at failure were also increased according to the arrangement of steel fibers due to exposure to electromagnetic fields. On the other hand, the fracture energy hardly increased. It is considered that there was a limit in resisting crack growth because the area where the arrangement of steel fibers could be adjusted under the electromagnetic field was not deep to center of specimen and the end shape of the steel fibers were straight not hooked. Additional research is needed to address these issues.

• The Journal of the Convergence on Culture Technology
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• v.8 no.3
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• pp.175-182
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• 2022

The purpose of this study was to examine the effect of telephone intervention on the reduction of depression after the intervention for the elderly living alone during the COVID-19 pandemic. A one-group pretest and posttest design was used to examine changes in depression level following telephone intervention a once a week for 10 weeks. The subjects of this study were older adults aged 65 registered with 3 social welfare institutions in Wonju, and a total of 114 elderly completed a questionnaire before and after the intervention. Telephone intervention was provided by 56 nursing student volunteers, and each student was in charge of 2-3 elderly people. The depression score decreased from 6.59±3.74 before the intervention to 5.01±3.34 after the intervention (t=4.959, p<.001). Study findings suggest that telephone intervention is effective as an emotional support for the elderly living alone during the COVID-19 pandemic. Further research is needed to expand the scope of various subjects and regions, including the elderly not living alone.

• Proceedings of the KIEE Conference
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• 2003.07a
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• pp.354-356
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• 2003

본 논문에서 제시한 전력감시 시스템은 원주권광역상수도에 적용된 개방형 SCADA 시스템으로 무인화 사업장에 널리 사용되는 설비로서 중앙제어실에서 CRT화면을 통하여 원거리에 위치한 현장설비를 감시할 수 있으며 필요시 제어 명령을 보내서 해당기기를 제어하도록 구성되어 있다. 전기설비를 감시하는 모든 계전기는 디지탈로 구성되어 있어 전압, 전류값을 추적하고 판독하도록 되어 있다. 특히 각 판넬 내부에 설치된 폐쇄배전반 절연열화 진단설비는 전력설비 열화 시 발생하는 부분방전 검출을 위해 30MHz대역의 협대역으로 선정되어 있으며, 1초 동안 펄스 크기와 펄스 수량을 측정하여 열화진행과정을 실시간으로 근무자에게 통보하고, 또한 화재감시센서를 이용하여 화재발생 시 배전반 상부에 설치된 개별형 자동소화기가 동작하여 사고 파급을 막도록 구성하였다.

• Korean Journal of Food Science and Technology
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• v.51 no.2
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• pp.160-168
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• 2019

This study aimed to determine whether double-processed ginseng berry extract (PGBC) could improve learning and memory in an $A\hat{a}42$-induced Alzheimer's mouse model. Passive avoidance test (PAT) and Morris water-maze test (MWMT) were performed after mice were treated with PGBC, followed by acetylcholine (ACh) measurement and glial fibrillary acidic protein (GFAP) detection for brain damage. Furthermore, acetylcholinesterase (AChE) activity and choline acetyltransferase (ChAT) expression were analyzed using Ellman's and qPCR assays, respectively. Results demonstrated that PGBC contained a high amount of ginsenosides (Re, Rd, and Rg3), which are responsible for the clearance of $A{\hat{a}} 42$. They also helped to significantly improve PAT and MWMT performance in the $A{\hat{a}} 42-induced$ Alzheimer's mouse model when compared to the normal group. Interestingly, ACh and ChAT were remarkably upregulated and AChE activities were significantly inhibited, suggesting PGBC to be a palliative adjuvant for treating Alzheimer's disease. Altogether, PGBC was found to play a positive role in improving cognitive abilities. Thus, it could be a new alternative solution for alleviating Alzheimer's disease symptoms.