• 한국환경복원기술학회지
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• 제22권2호
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• pp.73-92
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• 2019

The purpose of this study is to establish the conservation and restoration areas for sustainable stream management by reflecting the ecological health, cultural characteristics, and the citizens' needs for stream uses. Therefore, we extended spatial ranges of stream evaluation to riparian areas in addition to stream sections. The evaluation indexes are stream naturalness, availability, biota assessment, and riparian characteristics such as land uses and legally protected areas. The grading system was unified with five classes. The spatial evaluation units for stream section are classified as right and left for laterally and 500m for longitudinally. For riparian areas, 30m and 100m of distance from the edge of stream are applied as spatial evaluation units. The six types of stream sections for management are conservation sections(priority/general) and restoration sections(priority/general) for ecological landscape and core and general sections for cultural landscape. The established system for evaluation and designating areas for stream management was applied to Jeonjucheon and Samcheon in Jeonju-si, and the conservation and restoration areas were designated reflecting the characteristics of urban and non-urban areas and left and right of stream sections. The results of this study will provide detailed guidelines for designating stream sections and practical management strategies for sustainable urban stream management.

• Weed & Turfgrass Science
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• 제7권3호
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• pp.181-190
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• 2018

본 연구는 2017년 2월부터 4월까지 충북지역 제초제 저항성 논잡초 발생현황을 조사하기 위하여 11개 시 군 289지점에서 토양시료를 채취하였다. 충북지역의 제초제 저항성 논잡초의 발생을 조사한 결과, 시 군별 최우점 잡초는 물달개비이었고, 그 다음은 강피였다. 충북지역의 제초제 저항성 잡초 발생비율과 면적은 각각 80.6%, 28,272 ha로 지난 2012년 보다 3배 증가하였다. 옥천군의 저항성 발생율이 93.8%로 가장 높았고, 충주시, 보은군, 영동군, 진천군과 괴산군이 80% 이상, 청주시, 음성군, 증평군이 70% 이상으로 높은 수준이었다. 발생면적은 청주시가 6,957 ha로 가장 많았고, 충주시, 진천군, 보은군, 음성군의 순으로 높았다. 초종별 제초제 저항성 비율과 면적은 물달개비 49%, 17,646 ha, 강피 44%, 15,617 ha, 올챙이고랭이 29%, 10,377 ha의 순으로 발생하였다. 충북지역 모든 지역에서 물달개비와 강피는 acetolactate synthase (ALS) 저해제 제초제에 저항성이 40% 이상이므로 집중적인 관리가 필요하며, 현재 설포닐우레아계 제초제 사용이 증가하고 있고, 대부분의 농가가 이앙 후 10일 이전에 제초제를 사용하기 때문에 이앙 후에도 관리가 필요하며, 매년 적용 제초제를 교호 살포하는 방법으로 제초제 저항성 잡초의 발생을 줄여야 하겠다.

• 한국광학회지
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• 제18권6호
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• pp.452-460
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• 2007

ZERODUR와 용융 석영으로 저산란 반사경을 제작하고 산란 특성을 연구하였다. Bowl feed 법을 이용하여 초연마면인 표면거칠기 0.326 ${\AA}$인 용융 석영 기판과 표면거칠기 0.292 ${\AA}$의 ZERODUR 기판을 얻었다. 이온빔 스퍼터링 방법으로 초연마된 기판 위에 $SiO_2$와 $Ta_2O_5$를 교번으로 22층을 증착하여 다층박막 고반사 거울을 얻었다. 용융 석영 반사경과 ZERODUR 반사경의 산란이 각각 4.6 ppm과 30.9 ppm으로 측정되었으며, 이로부터 산란이 매우 작은 경우 기판의 표면거칠기가 산란을 결정하는 주요 파라미터가 아니라는 것을 알았다. 나아가 반사경의 표면거칠기를 AFM으로 측정한 결과. ZERODUR 반사경이 용융 석영 반사경 보다 박막의 표면거칠기가 2.3배 더 높게 측정 되었다. 이 결과는 기판-박막 경계면에서 박막 형성 초기에 기판의 화학조성 또는 결정방향과 증착물질의 상호관계로 인하여 박막 형성 초기에 표면거칠기가 급격히 나빠져서 발생하는 것으로 유추되었다. SEO 300A으로 접촉각 측정을 하여 Giriflaco-Good-Fowkees-Young 방법으로 표면에너지를 계산하였다. 표면거칠기 0.46 ${\AA}$을 갖는 용융 석영 기판이 표면거칠기 0.31 ${\AA}$을 갖는 ZERODUR 기판보다 접촉각이 더 작고 표면에너지는 크게 나타났다. 이러한 차이가 기판 종류에 따라 박막형성 초기에 표면거칠기를 다르게 하는 한 요인으로 판단되며, 기판의 표면에너지가 높을수록 미려한 박막표면을 얻는 것으로 확인되었다. ZERODUR의 표면에너지 차이를 설명하기 위해 XPS 분석으로 용융 석영은 Si, O로 구성되었고 ZERODUR는 Si, O, Al, Na 그리고 F로 구성되었다는 것을 알 수 있었다.

• 한국방사선학회논문지
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• 제17권3호
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• pp.367-373
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• 2023

비행시 승무원이나 승객은 우주방사선과 공기나 비행기 기체와 반응하여 발생한 2차 산란선 등에 의해 피폭을 받게 된다. 항공기 승무원의 경우 우주기상 환경 시뮬레이션을 이용하여 계산된 피폭선량으로 방사선 안전관리를 적용받고 있다. 하지만, 태양활동이나 고도, 비행경로 등에 따라 피폭선량이 가변적이어서 계산법보다는 항로별 측정하는 것이 권고되고 있다. 본 연구에서는 범용 Si 센서와 다중채널파고분석기를 이용하여 우주방사선 선량을 측정할 수 있는 선량계를 개발하였다. 선량계산은 미우주항공국의 우주방사선 측정장비인 CRaTER(Cosmic Ray Telescope for the Effects of Radiation)의 알고리즘을 적용하였다. 표준교정시설에서 Cs-137 662 keV 감마선으로 에너지 및 선량교정을 시행하였으며, 실험 범위에서 선량률 의존성이 없음을 확인하였다. 제작된 선량계를 이용하여 2023년 5월 두바이 인천 구간의 국제선에서 직접 선량을 측정한 결과 국내 우주방사선 선량평가코드(KREAM; Korean Radiation Exposure Assessment Model for Aviation Route Dose)로 계산된 결과와 12% 이내로 비슷하게 나타났으며, 고도와 위도가 높아짐에 따라 계산 결과와 동일하게 선량이 증가하는 것을 확인하였다. 좀 더 많은 실증적 검증 실험이 요구되는 제한점은 있지만, 항공기 내 또는 개인 피폭선량 모니터링에 가성비가 우수한 선량계로 충분한 활용 가능성을 확인하였다.

• 전기학회논문지
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• 제65권10호
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• pp.1702-1705
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• 2016

We propose a novel hydrogen-reduced p-type amorphous silicon oxide buffer layer between $TiO_2$ antireflection layer and p-type silicon window layer of silicon thin film solar cells. This new buffer layer can protect underlying the $TiO_2$ by suppressing hydrogen plasma, which could be made by excluding $H_2$ gas introduction during plasma deposition. Amorphous silicon oxide thin film solar cells with employing the new buffer layer exhibited better conversion efficiency (8.10 %) compared with the standard cell (7.88 %) without the buffer layer. This new buffer layer can be processed in the same p-chamber with in-situ mode before depositing main p-type amorphous silicon oxide window layer. Comparing with state-of-the-art buffer layer of AZO/p-nc-SiOx:H, our new buffer layer can be processed with cost-effective, much simple process based on similar device performances.

• 상하수도학회지
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• 제24권6호
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• pp.743-751
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• 2010

It requires an interim performance assessment for BTL business of the sewerage rehabilitation which continues from 2005 till now. Means, It is necessary to make an interim performance assessment and an analysis of an business effect of the sewerage rehabilitation BTL projects which still continues, and we presented an improvement method of the new sewerage rehabilitation project in future. This paper has conducted an analysis of the business effect for 3 local government BTL projects which are completed and under operation as of now in Jincheon-Gun, Cheongju-Si and Gangjin-Gun. As a method of business effect analysis, we conducted a business effect of the 3 places using the index set which we previously set for the business effect analysis. The index set in this research was sectionalized to an improvement effect of operating wastewater treatment plant, an benefit effect of the direct cost, an benefit effect of the indirect cost and an environment friendly effect. We, in this paper, conducted an business effect analysis for 3 sewerage rehabilitation BTL projects which are completed or under operation recently as a demonstration, however we judge that an business effect analysis shall be conducted in a stage that a significant time for operation has passed since the completion of the construction in order to induce an actual business effect of the sewerage rehabilitation BTL project.

• 한국생활과학회지
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• 제22권6호
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• pp.599-613
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• 2013

The purpose of this study was to investigate the mediating effects of empathic ability and depression on the relationship between adult attachment and psychological well-being of university students. We conducted a survey on 318 university students in Cheongju-si and Hongseong gun. The data were analyzed by Pearson' productive correlation, hierarchical regression analysis and Sobel test. The results were as follows: Firstly, anxiety attachment, empathic ability and depression were significant predictors of the psychological well-being of university students. Depression was the strongest predictors psychological well-being. Secondly, depression mediated partially the relationship between anxiety attachment and psychological well-being, and empathic ability and depression mediated partially the relationship between avoidance attachment and psychological well-being. In conclusion, the empathic ability and depression mediate the effects of adult attachment on psychological well-being of university students. The implications and limitations of this study were discussed.

• 국제물리치료학회지
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• 제5권1호
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• pp.647-651
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• 2014

The purpose of this study is to provide the case of influence of myofacial release(MFR) and cryotherapy in acute whiplash injury. The subjects were consisted of 3 adults(2 males, 1 female) who had been diagnosed with whiplash injury. The performance period was 1 weeks, 6 times and 1 time is 40min(MFR: 20min, cryotherapy: 20min). We measured neck pain(Visual analogue scale, VAS) and cervical alignment(cervical curvature & line of gravity). All measurements of each subject were measured at pre-treatment and post-treatment. The results are listed below. The neck pain(VAS) index decreased from 7.54cm to 4.11cm. The cervical curvature increased from $23.62^{\circ}$ to $29.76^{\circ}$. The line of gravity decreased from 8.03mm to 3.66mm. Based on the results, it can be suggested that both MFR and cryotherapy can be used to neck pain and alignment in acute whiplash injury.

• 한국생활과학회지
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• 제24권5호
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• pp.645-661
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• 2015

The purpose of this study was to investigate the effects of socio-demographic variables, adult attachment and emotion regulation style on psychological well-being of university students. We conducted a survey on 318 university students in Cheongju-si and Hongseong gun. T-test, Pearson' productive correlation, hierarchical regression analysis were used. The results were as follows: First, there was a significant difference in emotion regulation style according to university student's sex. In other words, females used more support-seeking style than males did. Second, male university students' psychological well-being was high at more active style, less anxiety attachment and avoidant/distractive style, older students, less avoidance attachment, and higher economic status. Third, female university students' psychological well-being was high at less avoidant/distractive style and more active style, older students, less anxiety attachment, and more support-seeking style. In conclusion, emotion regulation style was the strongest factor to increase university student's psychological well-being among other variables. The implications and limitations of this study were discussed.

• Physical Therapy Rehabilitation Science
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• 제7권1호
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• pp.1-5
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• 2018

Objective: Setting therapeutic goals assist to identify patient priorities and predict problem that may arise in performing daily and functional activities. Goal setting is associated with improved rehabilitation outcomes in individuals with hemiparetic stroke. This study was conducted to assess the effects of having awareness and satisfaction of goals on the functional status of individuals with hemiparetic stroke. Design: Cross-sectional study. Methods: Eighty-one people who had been diagnosed with stroke participated in this study. The study was conducted through a face-to-face surveys to identify participants' awareness and satisfaction of goals and standard assessment tools were used to evaluate patients' functional status. This study measured functional status through three clinical measures including the manual function test (MFT), Berg Balance scale (BBS), and modified Barthel index (MBI). Results: In participants with hemiparetic stroke, the MBI, BBS, and MFT scores were significantly higher in the participants who were aware of the therapeutic goal than in those who were unaware (p<0.05). The MBI, BBS, and MFT scores were not significant between the participants who were satisfied with the goal and those who were unsatisfied. Conclusions: This study suggests that having awareness in therapeutic goal-setting could lead to improvement of functional status in those with hemiparetic stroke. This study highlights how goal-setting can have a positive effect on persons with hemiparetic stroke.