• 조명전기설비학회논문지
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• 제21권6호
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• pp.117-125
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• 2007

연료전지 발전시스템에서는 DC-DC 승압용 컨버터와 DC-AC 인버터가 필요하다. 그러므로 본 논문에서는 연료전지의 전압을 380[VDC]로 승압하기 위한 절연형 DC-DC 컨버터와 단상 220[VAC]로 변환하기 위한 LC필터를 가진 PWM 인버터로 구성된 전력변환장치를 제안하였다. 특히 제안한 연료전지 시스템용 고효율 DC-DC 컨버터는 위상천이 PWM 제어법을 이용하여 부분 공진에 의한 ZVS를 실현하였으며, 일정 스위칭 주파수화 및 스위치의 스위칭 손실, 피크 전압과 전류를 저감시켰다. 그리고, 정류회로에 2개의 인덕터를 첨가하여 리플성분이 저감된 직류전압과 전류를 부하측에 안정하게 공급할 수 있었다. 또한, 넓은 출력 전압 조정에도 효율을 92[%]정도 얻을 수 있다. 이상과 같이 결과는 시뮬레이션과 실험을 통하여 그 타당성을 확인하였다.

• 한방안이비인후피부과학회지
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• 제33권3호
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• pp.45-68
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• 2020

Objectives : This study aims to evaluate the effectiveness and safety of manual and electroacupuncture on glaucoma. Method : We searched 11 electronic databases using index words to identify randomized clinical trials. Meta-analysis of weighted mean difference (WMD) or standardized mean difference (SMD) were used to evaluate the outcomes. Cochrane bias risk assessment tool was used to assess the risk of bias in each clinical study. The collected data was analyzed using RevMan software (ver. 5.3). Results : At the initial stage of data retrieval, 549 papers were searched. After reviewing 37 full texts, a total of 10 RCT studies (426patients, 715 eyes) were selected and 8 RCT studies (357 people, 617 eyes) were involved in meta-analysis. Meta-analysis of 8 RCTs showed that acupuncture alone was more effective in reducing intraocular pressure(IOP) than conventional treatment (WMD = -5.73, 95% CI: [-12.30, 0.83], P = 0.09, I² = 97%) The combination of acupuncture or electroacupuncture with conventional treatment was also effective in lowering IOP (WMD = -1.84, 95% CI: [-2.31, -1.37], P <0.00001, I² = 45%). It was estimated that the combination of acupuncture with conventional treatment was also effective for improving visual field (VF) (WMD = -2.17, 95% CI: [-4.32, -0.02], P = 0.05, I² = 89%) but improvement in visual acuity (VA) was not significant (MD = 0.06, 95% CI: [-0.03, 0.15], P = 0.23, I² = 0%). Subgroup analyzes were performed only for the studies that used open glaucoma as the study's disease and combination of acupuncture or electroacupuncture with conventional therapy would have an effect on lowering intraocular pressure (WMD = -1.68)., 95% CI: [-2.46, -0.90], P <0.0001, I² = 29%). Conclusion : This study suggests that acupuncture treatment for glaucoma may be effective in reducing intraocular pressure and helpful in improving visual field defects. However, due to the small sample size, high risk of bias and high heterogeneity in the methodology, it is expected that further studies will be needed to verify the results. Further studies in large-scale samples based on a minimized biased methodology would be necessary.

• 지역사회간호학회지
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• 제11권2호
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• pp.538-555
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• 2000

The purpose of this study, in which 573 students from 2 high schools in Kang Nung city participated was to identify the attitude and experience of sexual harassment. This information will provide useful data, and promote a more systematic sexual harassment education program. The subjects of this study were 278 male students and 295 female students. The data was collected from September 25 to October 6. 2000. The data was analyzed using the statistical Computer package. SPSS to manipulate the data along with frequency, percentage, and mean t-test. The results from this study were summarized as follows. 1. The results from this comparison between two groups were significant in their attitude on sexual harassment(t=-2.26. p=0.024). Female students had higher scores than male students. 2. As a cause of sexual harassment. 'A man's misjudgement regarding a women as sexual objects(n=130: 22.7%)'. 'Patriarchal system of unequal distribution of power and status between the sexes(n=105: 18.3%)'. 'The effect of sexual stimulatives. (pornography. pornovideo. TV program ect.)(n=89: 15.5%)'. 3. As a countermeasure for prevention, 'Punishment, law and regulation of the sexual harasser(n = 151; 26.4%)', 'A preventive education of sexual harassment in adolescence (n = 125: 21.8%)'. 'Reformation of gender inequality and sex discrimination in the socio-structure(n=76; 13.3%)'. 4. Out of 573 students who participated in this study, 209(36.5%) students reported experiencing an incident of sexual harassment. For 278 males who participated in this study, 88(31.7%) had experienced an incident of sexual harassment. For the 295 females who participated in this study, 121(41.0%) had experienced an incident of sexual harassment. The type of sexual harassment is reported physical sexual harassment(n = 248: 40.5%), verbal sexual harassment(n = 226; 36.7%), and visual sexual harassment(n=139: 22.6%). 5. Their age in which they had experienced harassment was usually 'after 16 years of age(n=122: 58.4%)'. The age of harassers were mostly teenagers(n=112; 53.6%). The relationship to the with sexual harasser was a stranger (n=85; 40.7%), or a friend(n=78: 37.3%). After the incident of sexual harassment occurred, some students informed friends (n=114: 54.5%), 63(30.1%) told no one. Male students' feelings after the experienced harassment ranged from: 'be interesting', 'be pleasant'. Female students' feelings after the experienced harassment ranged from; 'be surprised', 'get a shock', 'fear', 'shame'.

• 한국전통조경학회지
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• 제35권4호
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• pp.144-164
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• 2017

본 연구는 중국 문화유산관광지 대명궁과 병마용을 방문한 중국관광객들을 대상으로 관광동기를 분석하였고 동기에 따른 시장세분화를 연구하였다. 그리고 대명궁과 병마용의 문화재활용 만족도 차이를 조사하였다. 관광동기 요인분석에 대한 측정변수로 사용된 14개의 문항에 대하여 요인분석 검증과 '체험성, 문화매료성, 여가신기성, 사교성' 등 총 4개 요인을 추출하였다. 그 도출된 4개의 방문동기요인은 군집분석을 실시하여 결국 2개의 군집(문화체험동기집단, 여가사교동기집단)을 지정하였다. 분석결과에 따라 문화유산관광객은 관광지에 대한 문화체험성을 더 선호하는 것을 알 수 있었다. 따라서 문화유산관광지 문화체험성에 대해 투입한 노력이 필요하다. 대명궁과 병마용의 문화재활용 만족도 차이를 검정하기 위하여 22개의 측정항목에 대해 T-test분석을 실시하였다. 분석결과를 통해 문화재의 보존, 복원상태, 사실성, 유형문화유산 가치, 문화재에 관련 체험프로그램, 해설서비스, 안내문, 휴게시설, 기념품의 상징성, 입장료, 주변 식당과 숙박시설은 문화재활용의 만족도에 미치는 영향요인이 될 수 있음을 알 수 있었다. 문화유산관광지의 관리자들이 문화재를 잘 보존하고 편의시설과 직원들의 전문성을 높이고, 방문객들이 문화재를 더 쉽게 이해할 수 있도록 해설에 더욱 중점을 두어 방문경험에서 교육적인 효과를 얻었다고 느낄 수 있도록 만들 때 문화재활용의 만족도를 더욱 높일 것이다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2011년도 학술발표회
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• pp.14-14
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• 2011

Groundwater in the Waikatoregion is a valuable resource for agriculture, water supply, forestry and industries. The 434,000 ha study area comprises the upper Waikato River catchment from the outflow of Lake Taupo (New Zealand's largest lake) through to Lake Karapiro (a man-made hydro lake with high recreational value) (Figure 1). Water quality in the area is naturally high. However, there are indications that this quality is deteriorating as a result of land use intensification and deforestation. Compounding this concern for decision makers is the lag time between land use changes and the realisation of effects on groundwater and surface water quality. It is expected that the effects of land use changes have not yet fully manifested, and additional intensification may take decadesto fully develop, further compounding the deterioration. Consequently, Environment Waikato (EW) have proposed a programme of work to develop a groundwater model to assist managing water quality and appropriate policy development within the catchment. One of the most important and critical decisions of any modelling exercise is the choice of the modelling platform to be used. It must not inhibit future decision making and scenario exploration and needs to allow as accurate representation of reality as feasible. With this in mind, EW requested that two modelling platforms, MODFLOW/MT3DMS and FEFLOW, be assessed for their ability to deliver the long-term modelling objectives for this project. The two platforms were compared alongside various selection criteria including complexity of model set-up and development, computational burden, ease and accuracy of representing surface water-groundwater interactions, precision in predictive scenarios and ease with which the model input and output files could be interrogated. This latter criteria is essential for the thorough assessment of predictive uncertainty with third-party software, such as PEST. This paper will focus on the attributes of each modelling platform and the comparison of the two approaches against the key criteria in the selection process. Primarily due to the ease of handling and developing input files and interrogating output files, MODFLOW/MT3DMS was selected as the preferred platform. Other advantages and disadvantages of the two modelling platforms were somewhat balanced. A preliminary regional groundwater numerical model of the study area was subsequently constructed. The model simulates steady state groundwater and surface water flows using MODFLOW and transient contaminant transport with MT3DMS, focussing on nitrate nitrogen (as a conservative solute). Geological information for this project was provided by GNS Science. Professional peer review was completed by Dr. Vince Bidwell (of Lincoln Environmental).

• 철학연구
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• 제145권
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• pp.45-69
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• 2018

이 글은 포스트휴먼이 단순히 과학기술의 효과가 아니라 인문학의 이념에 의해 제약될 수밖에 없다는 관점에서 포스트휴먼시대의 인간다움을 성찰하는 한 가지 시도이다. 필자는 휴머니즘 또는 인간중심주의(anthropocentricism)의 시각에 갇힌 근대성을 넘어선 새로운 인간에 대한 물음이 두 가지 의미에서 비판적으로 제기되어야 한다고 본다. 첫째, 포스트휴먼은 근대의 계몽적 주체에 의해 억압된 타자인 신체, 감성, 자연, 여성의 목소리를 회복할 수 있는가? 둘째, 포스트휴먼은 인간의 본질이나 불변의 토대를 상정하지 않고 지금 이곳에서 비인간적인 것과 싸우면서 인간성을 보존할 수 있는가? 위 물음을 제기하는 과정에서 필자는 근대의 계몽적 휴머니즘의 파국을 각기 다른 경로를 따라 동시에 겪었던 하이데거(M. Heidegger, 1889-1976), 벤야민(W. Benjamin, 1892-1940), 아도르노(Th. W. Adorno, 1903-1969)와 대화를 시도한다. 세 철학자는 근대 휴머니즘과 기술문명이 초래한 비인간적 세계상황을 목도하면서 계몽적 주체의 타자인 예술과 예술작품으로부터 인간 이후의 인간의 가능성을 발견했다. 필자는 세 철학자가 주장한 새로운 인간상을 '끊임없이 탈존하는 인간'(하이데거/ 2장), '신경감응을 통해 타자와의 유사성을 회복한 인간'(벤야민/ 3장), '비인간적인 사회를 규정적으로 부정하는 인간'(아도르노, 4장)으로 특징짓고, 각각의 현재성을 검토할 것이다. 결론적으로 필자는 4차산업혁명 시대가 인간의 감각, 충동, 무의식에 이르기까지 세계 전체를 더욱더 촘촘히 관리하고 통제하는 디지털 자본주의의 시스템으로 전개되는 한, 포스트휴먼시대 인간다움의 필요조건이 '심미적 진정성'(${\ddot{a}}sthetische$ $Authentizit{\ddot{a}t$)이라고 주장할 것이다.

• 기록학연구
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• 제57호
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• pp.165-234
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• 2018

기록향연은 인간에게 기록이란 무엇인가를 곰곰이 생각하면서 그 생각을 찬찬히 기록하는 시간이었다. 사람들이 기록하는 모습을 가만히 지켜보았다. 한 사람이 생각을 꺼낸다는 것은 그 사람의 욕망, 언어, 정서, 감각이 동시에 움직이는 신체적 활동이었다. 철학에서 생각은 논리적이고 인식적인 행위만이 아니다. 생각은 사고, 느낌, 정서, 의지 등을 망라하는 신체적(정신과 육체) 활동이다. 신체에서 어떤 정서적 변화가 생기면 그 변화에 대한 관념이 생긴다. 정서적 변화는 신체의 활동능력을 증가, 감소, 촉진, 저해하는 힘으로 작용한다. 그러나 처음부터 철학적 개념을 제시하지는 않았다. 사랑은 누가 가르쳐주지 않는다. 어느 순간 자신도 모르게 사랑하면서 사랑이 무엇인지 실감나게 몸으로 겪고 그 안에서 다시 사랑을 반복하면서 희노애락을 겪는다. 인생사가 대체로 이러지 않을까. 공장에서 자동차를 만드는 것과는 다를 것 같다. 기록향연이 시작되면, 무작정하고는 당신에게 기록이란 무엇인지 생각해보자고 했고, 그런 생각을 출처로 삼아 기록하자고 했다. 기록향연은 아직 고유명사이다. 일반명사가 되기를 바라는 마음으로 기록향연이라는 기록실험의 과정과 의미를 보고한다.

• 토지주택연구
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• 제13권3호
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• pp.93-106
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• 2022

일반적으로 실내 공기질을 조절하기 위해서는 환기의 역할이 중요하다. 최근 코로나-19 등 감염병의 확산으로 거주자들의 실내에서 보내는 시간이 늘어남에 따라 환기의 중요성은 더욱 높아지고 있으며, 환기성능에 대한 관심도 더욱 높아지는 추세이다. 많은 국가에서 현재 환기 성능을 파악하는 지표로서 시간당 환기횟수를 사용하고 있으며, 국내에서도 공동주택을 대상으로 시간당 0.5회 이상의 환기횟수를 확보하도록 규제하고 있다. 하지만, 선행연구 및 국내외 환기성능 평가 관련 표준을 검토한 결과 시간당 환기횟수만을 통해 실내 환기 성능을 평가하는데에는 실질적 실내 환기 성능을 평가하는 데에는 한계가 있는 것으로 나타났으며, 실질적인 환기 성능을 평가하기 위해서는 실내 국소부위를 대상으로 오염물질 저감속도와 공간내 환기 성능 균일도 등을 고려하는 것이 필요할 것이다. 이에 대해 본 연구에서는 추적가스 희석법을 이용한 실증 실험을 통해 측정 위치별 유속, 공기연령 및 환기효율을 측정하고 비교하였으며, 측정점별 조합에 따른 평균값과 공간 내 중심점에서의 측정값을 비교하여 측정점 선정에 따른 환기성능 차이를 비교 조사하였다. 본 연구 결과는 향후 실환경 기반의 주거공간 실내 환기성능을 평가하기 위한 실험절차 개발을 위한 기초자료로 활용될 수 있을 것이다.

• 한국동물위생학회지
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• 제45권1호
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• pp.1-11
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• 2022

A novel porcine circovirus 4 (PCV4) was recently identified in Chinese and Korean pig herds. Although several conventional polymerase chain reaction (cPCR) and real-time PCR (qPCR) assays were used for PCV4 detection, more sensitive and reliable qPCR assay is needed that can simultaneously detect PCV4 and internal positive control (IPC) to avoid false-negative results. In the present study, a duplex qPCR (dqPCR) assay was developed using primers/probe sets targeting the PCV4 Cap gene and pig (glyceraldehyde-3-phosphate dehydrogenase) GAPDH gene as an IPC. The developed dqPCR assay was specifically detected PCV4 but not other PCVs and porcine pathogens, indicating that the newly designed primers/probe set is specific to the PCV4 Cap gene. Furthermore, GAPDH was stably amplified by the dqPCR in all tested viral and clinical samples containing pig cellular materials, indicating the high reliability of the dqPCR assay. The limit of detection of the assay 5 copies of the target PCV4 genes, but the sensitivity of the assay was higher than that of the previously described assays. The assay demonstrated high repeatability and reproducibility, with coefficients of intra-assay and inter-assay variation of less than 1.0%. Clinical evaluation using 102 diseased pig samples from 18 pig farms showed that PCV4 circulated in the Korean pig population. The detection rate of PCV4 obtained using the newly developed dqPCR was 26.5% (27/102), which was higher than that obtained using the previously described cPCR and TaqMan probe-based qPCR and similar to that obtained using the previously described SYBR Green-based qPCR. The dqPCR assay with IPC is highly specific, sensitive, and reliable for detecting PCV4 from clinical samples, and it will be useful for etiological diagnosis, epidemiological study, and control of the PCV4 infections.

• 한국프랜차이즈경영연구
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• 제9권1호
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• pp.41-51
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• 2018

Purpose - In franchise system, how to build the relationship between the franchisor and franchisee through influence strategy is very important, because it affects on the long-term orientation like recontract intentions. Thus, this study examines the effect of mandatory influence strategy on relationship satisfaction, relationship trust, and recontract intentions in the context of food-service franchise industry. This study suggests the guidelines on how franchisor uses their influence strategy on franchisee to maintain and increase the recontract intentions. Research design, data, and methodology - This study examines the structural relationship between mandatory influence strategy, relationship satisfaction, relationship trust, and recontract intentions from the franchisee's perspective. Mandatory influence strategy divide into three sub-dimensions such as request, legalistic plea, threat. In order to test the purposes of this study, research model and hypotheses were developed. Every constructs were measured by multiple items tested and developed in the previous research. Also, the constructs utilized in this research are measured using 7-point scales anchored by "1=strongly disagree" and 7=strongly agree". The data were collected from 496 owner and owner manager franchisees and were analyzed using SPSS 21.0 and Smart PLS 3.0. program. Analysis of frequency was conducted to identify the demographics and general characteristics of the survey subjects. In order to measure the reliability and validity of the measurement tools, confirmatory factor analysis and correlation analysis were conducted and structural model analysis was conducted to verify the proposed research model. Result - The results of this study are as follows. First, this research found that mandatory influence strategy is positively related to relationship satisfaction and relationship trust, but not to recontract intention directly. Second, this research also found that the full mediating role of relationship satisfaction and relationship trust between the mandatory influence strategy and recontract intention. Conclusions - The findings of this research indicate that franchisor should use properly mandatory influence strategy to improve recontract intentions through relationship satisfaction and relationship trust. Due to the nature of food-service franchise industry, which needs high relationship quality, franchisor must manage their franchisee using influence strategy in order to improve satisfaction and trust. If franchisee perceives higher relationship quality, they will show higher intention to recontract. At the end of this paper, limitations and future research directions were suggested.