• 대한전자공학회논문지SD
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• 제45권3호
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• pp.69-76
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• 2008

본 논문에서는 가속도 센서 및 자이로 센서 등과 같이 고해상도 및 작은 면적과 적은 전력 소모를 동시에 요구하는 센서 인터페이스 응용을 위한 12비트 1kS/s 65uA 0.35um CMOS 알고리즈믹 A/D 변환기 (ADC)를 제안한다. 제안하는 ADC는 재순환 기법을 이용한 알고리즈믹 구조를 사용하여 샘플링 속도, 해상도, 전력 소모 및 면적을 최적화하였으며, 일반적인 열린 루프 샘플링 기법을 적용한 버전1과 오프셋 및 플리커 잡음을 제거하여 동적 성능을 향상시키기 위해 닫힌 루프 샘플링 기법을 적용한 버전2로 각각 제작되었다. 또한 SHA와 MDAC 회로에는 스위치 기반의 전력 최소화 기법과 바이어스 공유 기법이 적용된 2단 증폭기를 사용하여 면적과 전력 소모를 최소화시켰다. 한편, 저전력, 소면적 구현을 위한 개선된 기준 전류 및 전압 발생기를 온-칩으로 집적하였으며, 시스템 응용에 파라 선택적으로 다른 크기의 기준 전압 값을 외부에서 인가할 수 있도록 하였다. 제안하는 시제품 ADC는 0.35um 2P4M CMOS 공정으로 제작되었으며, 측정된 DNL 및 INL은 12비트 해상도에서 각각 최대 0.78LSB, 2.24LSB의 수준을 보이며, 동적 성능으로는 1kS/s의 동작 속도에서 버전1, 버전2 각각 최대 60dB, 63dB 수준의 SNDR과 70dB, 75dB 수준의 SFDR을 보여준다. 시제품 ADC의 칩 면적은 버전1, 버전2 각각 $0.78mm^2,\;0.81mm^2$ 이며 전력 소모는 2.5V 전원 전압과 1kS/s의 동작 속도에서 각각 0.163mW, 0.176mw이다.

• Biomolecules & Therapeutics
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• 제11권4호
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• pp.249-256
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• 2003

Pyroligneous liquid(PL) is produced by carbonizing Oak in 350-40$0^{\circ}C$. It is traditionally used for treating stress-related disorder, hepatic disease, immune disorder, G-I disorder and inflammatory disease. The aim of this study is to investigate anti-stress effects of PL. The experiments were performed with the use of young(9 weeks of age) male rats of SD strain and the male ICR mice (20-25 g). Animals of the normal group were not exposed to any stress and the control group were exposed to stress. The rats of the Ginseng, diazepam(BZ) and PL supplementary group were orally administered once a day 100 g of Ginseng extract-kg body weight, 5 mg of BZ/kg body weight and 1 ml of PL100 g body weight and then exposed to stress. The mice of the Ginseng, BZ and PL supplementary group were given water containing 100 g of Ginseng extract/100 ml potable water, 5 mg of BZ/kg 100 ml of drinking water and 10 ml of PL/100 ml of drinking water and exposed to stress. Animals were given materials for 7 days after stabilizing them, and then were given supplementary materials for 5 days with stress. They were stressed by immobilization for 30 minutes and then the animals were exposed to electroshocks for 5 minutes. We recorded stress-related behavioral changes of experimental animals by stressing them using the Etho-vision system and measured the levels of corticosterone in blood While stress suppressed locomotor activity of animals, PL-supplementation partially blocked the stress effect of locomotion in rats and mice, and also partially blocked stress-induced behavioral changes such as freezing, burrowing, smelling and rearing activity in rats and freezing, grooming, tailing and rearing in mice. The staying time of stressed rats and mice in open area decreased and in closed area it increased relatively in elevated plus maze test. However, these changes also partially were blocked by PL-supplementation. PL-supplementation decreased levels of blood corticosterone increased by stress in rats. These results suggest that PL protects partially the living organism from stress attack in some cases.

• 대한한의학회지
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• 제43권1호
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• pp.6-17
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• 2022

Objectives: This study describes the implementation of a training course that aimed to increase the competency of undergraduate students of Korean medicine at a single college to obtain informed consent and perform bee venom acupuncture using an objective structured clinical examination (OSCE). Methods: We developed and implemented a short training course for 111 fourth-year students of Korean medicine during their clinical rotation at the Department of Acupuncture and Moxibustion Medicine. Lectures were conducted on the effects of and hypersensitivity reactions to bee venom acupuncture, obtaining informed consent, performing skin test and bee venom acupuncture. Due to the COVID-19 pandemic, some students were offered online lectures, and some could not experience the performance of OSCE in person. A survey with 16 closed and three open questions was used to investigate self-efficacy, opinions about the online lectures, and the OSCE. Results: Out of 111 questionnaires, 104 were completed (94%). Students were generally satisfied with the online lectures and OSCE. For the subjective questionnaire about what was helpful in the training of bee venom acupuncture techniques and OSCE, the authenticity of the teaching method was recorded the highest. Conclusions: This study showed that online lectures were effective in teaching clinical skills of Korean Medicine. It is necessary to produce standard educational materials for clinical skills of Korean Medicine, and studies to analyze the reliability and validity of OSCE are needed.

• Asian-Australasian Journal of Animal Sciences
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• 제27권7호
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• pp.1044-1049
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• 2014

This study was conducted in order to investigate whether the presence of light or different colors of light would influence the energy expenditure and behavior of broiler chickens. Eight 8-week-old broiler chickens were adapted to a respiration chamber (Length, 28.5 cm; Height, 38.5 cm; Width, 44.0 cm) for one week prior to the initiation of the experiment. In experiment 1, energy expenditure and behavior of the chickens were analyzed in the presence or absence of light for four days. Chickens were exposed to 6 cycles of 2 h light/2 h dark period per day. In experiment 2, the broiler chickens that had been used in experiment 1 were used to evaluate the effect of 4 different wavelength light-emitting diodes (LEDs) on the energy expenditure and behavior of broiler chickens. The LEDs used in this study had the following wavelength bands; white (control), red (618 to 635 nm), green (515 to 530 nm) and blue (450 to 470 nm). The chickens were randomly exposed to a 2-h LED light in a random and sequential order per day for 3 days. Oxygen consumption and carbon dioxide production of the chickens were recorded using an open-circuit calorimeter system, and energy expenditure was calculated based on the collected data. The behavior of the chickens was analyzed based on following categories i.e., resting, standing, and pecking, and closed-circuit television was used to record these behavioral postures. The analysis of data from experiment 1 showed that the energy expenditure was higher (p<0.001) in chickens under light condition compared with those under dark condition. The chickens spent more time with pecking during a light period, but they frequently exhibited resting during a dark period. Experiment 2 showed that there was no significant difference in terms of energy expenditure and behavior based on the color of light (white, red, green, and blue) to which the chickens were exposed. In conclusion, the energy expenditure and behavior of broiler chickens were found to be strongly affected by the presence of light. On the other hand, there was no discernible difference in their energy expenditure and behavior of broiler chickens exposed to the different LED lights.

• 한국학교ㆍ지역보건교육학회지
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• 제18권1호
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• pp.57-68
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• 2017

Objectives: The purpose of the study was to evaluate the effect of community intervention on reducing salt intake among college students on their knowledge, attitude and practice of low-salt diet. Methods: A community intervention planned to increase college students' knowledge, attitude and practice of low-salt diet. The intervention comprised of 1 lecture on salt and health, 4 campaigns on low-salt diet, and 2 taste testing was carried out from March 24 to May 19, 2015. All the intervention was open to entire university while data was collected from a panel of convenient sample. We used the baseline data of 251 students, 226 students completed post-test. Post-test data on knowledge, attitude, and practice, blood pressure measurement, and urine salt test were collected on May 25 and 26 by trained nursing students and graduates. Baseline data were collected on March 17 and 18. Data were analyzed using IBM-SPSS 21.0 for t-test and ANCOVA. Results: Regarding a general characteristic and health behavior, there was statistically significant difference in living arrangement(p<0.001), amount of monthly allowance(p=0.005) and frequency of eating-out(p<0.001) between the two regions in this study. However, there was no statistically significant difference in gender, major, smoking, drinking and frequency of breakfast. Regarding a characteristic related to low-salt diet, there was statistically significant difference in diastolic blood pressure level(p=0.002), urine test(p=0.001). But there was no statistically significant difference in knowledge, attitude, practice of low-salt diet and systolic blood pressure. There was no statistically significant difference in their knowledge of low-salt diet(F=1.588, p=0.209), attitude(F=2.182, p=0.141), practice(F=3.507, p=0.062) and systolic blood pressure(F=1.723, p=0.191), diastolic blood pressure(F=1.552, p=0.214), urine test after a community intervention. Conclusions: Community intervention that does not have concrete target group doesn't seem to be effective on increasing knowledge, attitude and practice of the entire community, not even in university-a somewhat closed community. It is suggested to apply a target specific intervention in order to have efficient and effective outcome from a intervention.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
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• pp.140-145
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• 2012

The purpose of this study is to understand the change of impression by comparing the uniformity lighting with the compound lighting. In previous study, we proposed a light controlling method to harmonize daylight from a window and artificial lights from a ceiling and obtained the results to support our method. We referred this method as the Adjusted Compound-Lighting Model (AC Model). The model claims that lighting in a room with a side-window are perceived as harmonious when the overall light distribution in the room is well approximated by a compound of lights from the window and the entire ceiling. The experiment is carried out with the scaled-models and mock-up spaces that were supposed to be an office space. One is lit by the uniform lighting and the other by the compound lighting in each experimental space. In order to present varying illuminance distributions, thetwo variables were used in this study. One was the ratio of thelight from the window and ceiling in the standard and evaluation box. The standard box was provided by the ratio of 20% to 40% from the window and 80% to 60% from the ceiling as two lighting ratio patterns [Wu20(=Cu80) and Wu40(=Cu60)]. And the evaluation box was provided by the light ratio of 0% to 40 from the window and 100% to 60% from the ceiling [Wcp0(=Ccp100), Wcp20(=Ccp80) and Wcp40(=Ccp60)]. The other variable was themean illuminance level in both boxes. Two level of mean illuminance (700lx and 300lx) were used in this experiment. Each lighting condition was established at equal horizontal mean illuminance level, held constant near 700lx or 300lx in both boxes. Both of them were similar in the shape of distribution when there were same ratios of lights from the window and the ceiling. Subjects were asked to evaluate the point of difference by semantic differential rating on their overall impression after comparing with two rooms. The results showed that the impressions of compound lighting were more positive score than that of uniformity lighting on the items of 'dim-bright', 'dislike-like', 'artificial-natural' and 'closed-open', and that there was no significant difference in impressions between two spaces on other items.

• 한국조경학회지
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• 제38권4호
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• pp.75-83
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• 2010

대학 캠퍼스계획은 과거 대학의 기능과 건축물의 미관 만을 강조하였으나, 녹화, 에코를 중시하는 과정을 거쳐 이제는 지역주민의 문화와 커뮤니티 공간으로 전환되었다. 본 연구는 국립 순천대학교 문화공원 조성사업 현상설계 당선작으로 선정된 계획안의 설계전략과 내용을 분석한 것이다. 국립 순천대학교 문화공간 조경 설계의 주요 내용은 다음과 같다. 첫째, 대학 시설의 개방 차원을 넘어서 지역과의 적극적인 연계 방안을 모색하고자 하였다. 물리적 환경의 연계만이 아니라 학교와 지역의 역사, 문화를 시민과 함께 공유할 수 있는 계층별 프로그램을 공유하는 거점공간으로 조성하였다. 둘째, 건축물과 옥외시설물에 통합된 이미지를 부여하기 위하여 형태 및 색채계획을 수립하였다. 디자인 모티브는 대학을 대표하는 상징성이 충분한 '세권의 책'을 선정하여 3권의 책이 만들어내는 6개의 선과 이들이 만들어 내는 육각형, 원의 형태를 설계에 적용하였다 색채의 경우 조화성, 심미성과 함께 가시성을 높일 수 있도록 건축물에 대해서는 소재색인 적갈색을 적용하고 시설물의 경우 주조색은 검정색과 파랑색, 강조색은 흰색와 노랑색을 적용하여 순천 도시 이미지를 선도하고자 하였다. 셋째, 일반적으로 대학 캠퍼스가 가지는 폐쇄성을 극복하고 지역과 소통할 수 있도록 누구나가 자연스럽게 방문하고 체험이 가능한 베리어프리(barrier free) 설계를 지향하였다.

• Tuberculosis and Respiratory Diseases
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• 제87권1호
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• pp.100-114
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• 2024

Background: Long-term oxygen therapy (LTOT) improves the survival of patients with hypoxemia due to chronic respiratory diseases. The clinical outcomes of LTOT are strongly associated with patient adherence. To improve the adherence of patients, physicians have focused on the efficacy of LTOT. However, poor adherence may stem from patients' perceptions of LTOT. Herein we evaluated patients' perceptions of LTOT affecting adherence. Methods: We conducted a cross-sectional survey study using descriptive, open, and closed-ended questionnaire. Patients using oxygen therapy (OT) or requiring it but avoiding OT responded to the questionnaires at three university hospitals. Results: Seventy-nine patients responded to the questionnaires. The number of patients using home and portable OT was 69 (93%) and 37 (46.3%), respectively. Patients with good adherence were 22 (30.1%). Among patients with good adherence, 90.9% used oxygen according to physicians' prescriptions whereas only 37.3% of those with poor adherence followed physicians' prescriptions (p<0.01). The reasons for avoiding using home OT were fear of permanent use (50%), unwanted attention (40%), and lack of symptoms (40%). They avoided portable OT because of unwanted attention (39%), heaviness (31.7%), and lack of symptoms (21.6%). Conclusion: Patients on LTOT had the perception of the misunderstanding the effects of OT and of psychosocial barriers to initiate or use LTOT. Considering these findings, health professionals need to provide effective education on the purpose of LTOT to improve patient adherence to OT and provide sufficient support for the management of psychosocial barriers in patients using LTOT.

• 한국빅데이터학회지
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• 제8권2호
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• pp.233-248
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• 2023

스마트시티의 미래를 구축하는 과정에서, 모빌리티와 도로 인프라의 혁신은 중요한 주제 중 하나이다. 특히 오늘날 자율주행 자동차의 보급과 전기자전거, 전동킥보드, 전동휠 등 도로에 등장하는 모빌리티의 종류가 다양해짐에 따라 도로는 기존의 자동차와 보행자를 비롯해 수용해야 할 주체들이 다양해졌으며 각 모빌리티 간의 상충 또한 해결해야 할 문제이다. 완전도로(Complete Street)는 2003년 미국에서 등장한 용어로 보행자, 자전거 이용자, 대중교통 이용자, PM(Personal Mobility) 이용자, 자동차 운전자 등 모든 도로 이용자의 공평한 안전과 편의를 고려한 도로 설계와 운영을 의미한다. 현재 해외 여러 도시에서 완전도로를 구현하고 있으며, 이를 제도화하기 위한 연구도 활발히 진행되고 있다. 그러나 국내에서는 완전도로에 대한 연구와 논의가 부족한 실정이다. 따라서 본 연구는 델파이 (Delphi)기법을 통해 학계 및 실무 전문가들의 의견을 수집 및 분석하여 완전도로 설계에서 고려해야 할 주요 요인들을 정형화하고자 한다. 총 세 차례의 델파이 설문이 진행되며 1차 개방형 설문을 통해 전문가들의 자유로운 답변을 수집하고 이를 키워드 위주로 정리하여 2·3차 폐쇄형 설문을 작성하였다. 2·3차 설문은 총 52개의 문항으로 구성되었으며 설문 결과 52개의 문항 중 34개의 항목이 최종 요인으로 채택되었다.

• 한국가정과교육학회지
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• 제34권3호
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• pp.1-23
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• 2022

본 연구의 목적은 미얀마의 섬유 및 패션산업에 대한 교수 및 대학생들의 인식을 살펴보고 패션 관련 고등교육 프로그램의 현황과 수요를 파악하는 것이다. 이를 위해 미얀마 대학생들과 양곤공과대학교 섬유공학과 교수들을 대상으로 인터뷰 및 설문조사를 실시하였다. 한 명의 한국인 교수를 제외하고 교수들은 이메일을 통해 폐쇄형 및 개방형 질문이 포함된 설문지에 응답하였다. 학생 데이터는 온라인 그룹 인터뷰 또는 이메일을 통해 수집되었다. 응답은 키워드 추출 및 분류를 통해 분석되었으며, 미얀마의 고등교육에 대한 일반적인 의견에 대한 폐쇄형 질문에 대해 기술통계분석이 실시되었다. 일반적으로 교수들은 고등교육이 매우 중요하며, 미얀마의 고등교육이 개선될 필요가 있다고 하였으며, 예체능 교육이 매우 중요하고, 예술과 패션을 포함한 문화산업은 미얀마의 사회경제적 발전에 중요하며, 패션산업이 미얀마 경제에 기여하는 바를 고려할 때 패션교육은 중요하다고 답하였다. 미얀마의 패션 산업에 대한 관심은 특히 학생들 사이에서 매우 높았지만 섬유공학 분야 학위 취득에 대한 관심은 제한적이었다. 의류업계의 낮은 임금, 관심이 아닌 학점으로 전공이 결정되는 것, 미얀마의 고등교육 및 패션스쿨 패션학과의 부재 등을 이유로 들었다. 일부에서는 미얀마 대학생들의 교육적 요구에 맞는 패션 학위가 제공되면 이러한 인식이 개선될 것이라고 믿었다. 패션상품개발, 패션디자인, 패턴 메이킹, 패션마케팅, 패션 브랜딩, 패션매니지먼트, 복식사사, 문화연구 분야에서 교육 프로그램에 대한 수요가 높았다. 섬유공학과 학생들은 졸업 후 섬유 및 의류공장을 주요 취업 기회로 인식하였다. 많은 학생들이 더 높은 급여를 받고 더 높은 수준의 지식과 기술을 습득할 수 있기를 기대했기 때문에 글로벌 패션 브랜드에 취직하기를 원했다. 미얀마 패션교육프로그램 개발은 패션 및 패션교육 분야에 대한 관심 증가, 교육을 받을 여력이 없는 학생들에게 학습 기회 제공, 미얀마의 국가 브랜드 개발, 미얀마 패션산업 및 전통 브랜드의 브랜드화 개선 등 다양한 긍정적인 효과가 있을 것으로 기대하였다.