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UTAUT 이론을 적용한 스마트폰의 관광용 Alert System 이용의도에 관한연구
김종건(Jong Gyeon Kim),현용호(Yong Ho Hyun),박영아(Young A Park) 한양대학교 관광연구소 2013 觀光硏究論叢 Vol.25 No.3
본 연구의 목적은 환경적 요인, 개인적 요인, 노력기대, 성과기대, alert system 이용의도 간의 구조적 영향관계를 검증하는 것이다. 본 연구를 위해 인천국제 공항에서 탑승을 위해 대기 중인 응답자들을 대상으로 설문을 실시하였다. 총 350부가 배포되었고 불성실하게 응답을 한 설문을 제외한 303부가 최종 분석에 이용 되었다. 본 연구 결과는 다음과 같다. 첫째, 사회적 영향과 촉진조건이 노력기대에 정(+)의 영향을 준 것으로 나타난 반면 성과기대요인에는 영향을 주지 않은 것으로 밝혀졌다. 둘째, 자기 효능 감이 노력기대에 정(+)의 영향을 준 반면 성과기대에는 부(-)의 영향을 주었다. 셋 째, 노력기대가 성과기대에 유의미한 정(+)의 영향을 주었고 노력기대와 성과기대가 alert system 이용의도에 유의미한 정(+)의 영향을 준 것으로 나타났다. 관광 실무자 및 어플리케이션 개발자들을 위한 이론적·실무적 시사점이 제시되었고 마지막으로 한계점 이 논의되었다. The purpose of this study is to examine the structural relationships between environmental factors(i.e. social influence, facilitating conditions), personal factors(i.e. self-efficacy, anxiety), effort-expectancy, performance-expectancy, and an use intention of Alert systems. The questionnaires were distributed to people who would wait for the flight as a purpose of overseas travel at the Incheon International airport. Of the 350 distributed questionnaires, 303 usable data were used in the analysis. Confirmatory factor analysis and structural equation modelling analysis were adopted by using AMOS 5.0. Results of this study are as follows: first, it is found that social influence and facilitating conditions significantly impact on effort-expectancy, whereas those factors do not on performance-expectancy; second, it is discovered that self-efficacy has a positive effect on performance-expectancy, whereas anxiety significantly negatively influences performance-expectancy; Third, it is revealed that there is a positive influence of effort-expectancy on performance-expectancy; and fourth, both effort-expectancy and performance-expectancy postively affect the use intention of Alert systems. The theoretical and practical implications, and the limitations are discussed.
오대주 ( Oh Dae-ju ),현호봉 ( Hyun Ho-bong ),임태준 ( Lim Tae-joon ),윤선아 ( Yoon Seon-a ),함영민 ( Ham Young-min ),윤원종 ( Yoon Weon-jong ),양우삼 ( Yang Woo-sam ),정용환 ( Jung Yong-hwan ) 한국유기농업학회 2018 韓國有機農業學會誌 Vol.26 No.4
We analyzed the nuclear ribosomal internal transcribed spacer (ITS) sequence of common buckwheat, Fagopyrum esculentum and tartary buckwheat, F. tataricum. The diversity of the nucleotides and haplotypes, Tajima’s D, and Fu’s Fs was analyzed and compared among the varieties of common buckwheat and tartary buckwheat. The diversity of nucleotides and haplotypes indicated that the buckwheat populations had undergone rapid population expansion but D and Fs did not support their expansion statistically. The phylogenetic analysis of ITS sequences did not clearly establish the phylogenetic relationships between the varieties of common buckwheat. The In/Del sequence of ITS-1 region could, therefore, be used as a DNA marker to distinguish raw or manufactured products derived from common buckwheat and tartary buckwheat.
배기형 해부테이블과 급배기 장치를 설치한 해부실습실의 포름알데히드 농도 평가
서제훈(Je Hoon Seo),현종아(Jong-a Hyun),오민광(Min-Kwang Oh),김지영(Ji Young Kim),김용대(Yong-Dae Kim),김동운(Dong-Woon Kim),Alfreda Stadlin,손현준(Hyun Joon Sohn),이은영(Eun Young Lee) 대한체질인류학회 2016 해부·생물인류학 (Anat Biol Anthropol) Vol.29 No.3
해부실습을 위한 시신의 방부처리에 사용하는 포름알데히드는 인체에 유해하다. 국내외에서는 산업 현장에서 근로자들의 건강을 보호할 목적으로 포름알데히드의 허용농도를 규정 또는 권고하고 있다. 고용노동부의 시간가중평균농도 (time weighted average, TWA)의 허용범위는 0.5 ppm (0.75 mg/㎥) 이하이고 단시간노출농도 (short term exposure limit, STEL)는 1 ppm (1.5 mg/㎥) 이하이며 미국과 유럽의 TWA는 0.3~2 ppm 사이이다. 이 연구는 배기형 해부테이블과 급배기 장치를 설치한 해부실습실에서 포름알데히드의 공기 중 농도를 측정하여 국내외 포름알데히드 기준 농도와 비교하였다. 배기형 해부테이블은 elevated dissection table을 채택하여 10대를 설치하였고, 급배기 장치는 천장에 급기구 18개와 해부실습실 양쪽 벽면 아래쪽에 배기구 5개씩 10개를 설치하였다. 포름알데히드 농도 측정은 이동식 측정기인 Formaldemeter로 바닥에서 1.5 m 높이에서 실내 5부위와 시신 바로 위에서 측정하였다. 해부실습실 실내 5부위의 포름알데히드 평균농도는 0.31 ppm (0.45 mg/㎥)이었고, 0.21~0.41 ppm (0.26~0.51 mg/㎥)의 분포를 보였다. 시신 바로 위에서의 포름알데히드 평균농도는 0.45 ppm (0.56 mg/㎥)이었고, 0.31~0.64 ppm (0.39~0.80 mg/㎥)의 분포를 보였다. 포름알데히드의 TWA는 5시간 기준으로 해부실습실 실내가 평균 0.19 ppm (0.24 mg/㎥)이었고, 0.13~0.26 ppm의 분포를 보였다. 시신 바로 위의 TWA는 평균 0.28 ppm (0.35 mg/㎥)이었고, 0.19~0.40 ppm의 분포를 보였다. 배기형 해부테이블과 급배기 장치를 설치한 해부실습실은 고용노동부의 포름알데히드 농도 기준을 충족하였고, 대부분의 외국 기준도 충족하는 수준이었다. 이 연구는 국내 의과대학의 해부실습실 환경 개선 선도 모델의 첫 공기 질 평가로서 다른 의과대학 해부실습실의 공기 중 포름알데히드 농도의 기준값으로 활용될 뿐만 아니라 환경 개선 공사를 위한 설계 및 시공의 참고자료로 활용될 것으로 기대된다. Formaldehyde (FA) used for preserving the body for anatomy dissection is harmful to the human body. In many countries, for the purpose of protecting the health of workers in the industrial field, the maximal allowable air concentration of FA has been set. The threshold limit values of time weighted average (TLV-TWA) and short-term exposure limit (TLV-STEL) of FA recommended by Ministry of Employment and Labor (MOEL) of Korea are less than 0.5 and 1 ppm, respectively. In the United States and Europe, TLV-TWAs of FA are recommended at between 0.3 and 2 ppm. In this study, we compared the air concentration of FA to domestic and foreign standards of FA in an anatomy laboratory equipped dissecting tables with inbuilt exhaust and an air diffuser/return system. We installed ten elevated dissection tables, 18 air diffusers on the ceiling, and 10 air returns at the bottom of both side walls. The concentration of FA was measured at five sites in the anatomy laboratory and above the cadavers on the dissecting tables at a height of 1.5 m from the floor using a Formaldemeter. The average concentration of FA in the anatomy laboratory (five sites) was 0.31 ppm (0.45 mg/㎥), range 0.21 to 0.41 ppm (0.26~0.51 mg/㎥). The average concentration of FA above the cadavers was 0.45 ppm (0.56 mg/㎥), range 0.31 to 0.64 ppm (0.39~0.80 mg/㎥). The average TWA of FA in the anatomy laboratory was 0.19 ppm (0.24 mg/㎥), range 0.13 to 0.26 ppm. The average TWA of FA above the cadavers was 0.28 ppm (0.35 mg/㎥), range 0.19 to 0.40 ppm. The anatomy laboratory dissecting tables equipped with inbuilt exhaust and air diffuser/return system met the criteria of the FA concentration recommended by MOEL of Korea and most foreign countries. This study was the first evaluation of the air concentration of FA in an anatomy laboratory equipped dissecting tables with inbuilt exhaust and an air diffuser/return system in Korea. We expect it will be not only used as a standard of comparison for anatomy laboratories, but as a reference for design and construction to improve air quality in Korean Medical Colleges.
삼채의 조추출물과 유기용매 분획물에 대한 항산화 및 항염증 효과
이용범(Yong-Bum Lee),함영민(Young-Min Ham),윤선아(Seon-A Yoon),오대주(Dae-Ju Oh),송상목(Sang-Mok Song),홍인철(In-Choel Hong),이시택(Si Taek Lee),현호봉(Ho Bong Hyun),김창숙(Chang-Suk Kim),윤원종(Weon-Jong Yoon) 한국식품영양과학회 2017 한국식품영양과학회지 Vol.46 No.1
본 연구는 삼채의 조추출물과 유기용매 분획물들을 가지고 DPPH 라디칼 소거 활성에 의한 항산화 활성 검색 결과 디클로로메탄(CH2Cl2) 분획물과 에틸아세테이트(EtOAc) 분획물에서 라디칼 소거 활성을 나타냈으며, xanthine oxidase 억제 효과는 DPPH 활성 라디칼 소거 활성에서 제일 뛰어났던 에틸아세테이트 분획물에서, superoxide 소거 활성은 헥산(n-hexane) 분획물에서 활성이 나타났다. RAW 264.7 세포에 lipopolysaccharide로 자극을 주고 삼채 주정 추출물 및 유기용매 분획물들을 처리하여 확인해본 결과, 조추출물과 물 분획물을 제외한 나머지 유기용매 분획물에서 염증 유발 인자(NO, PGE2, iNOS, COX-2, IL-6 및 IL-1β) 생성억제 효과가 나타났으며, 그중 디클로로메탄 분획물과 에틸아세테이트 분획물에서 억제 효과를 확인할 수 있었다. 본 실험 결과 삼채 조추출물과 유기용매 분획물에서 항산화 효과 및 염증 유발 인자의 생성 억제 효과가 나타났으며, 이러한 결과 삼채에서 유효성분 추출을 통한 항산화, 항염증 물질의 연구 또는 예방하거나 치료할 수 있는 염증 억제 성분의 분리 및 그 작용기전 연구에 중요한 기초 자료가 될 것이라 생각한다. This study describes the preliminary evaluation of antioxidant and anti-inflammatory activities of Allium hookeri. A. hookeri was extracted using crude extract and then fractionated sequentially with n-hexane, CH2Cl2, EtOAc, and n-BuOH. To screen for antioxidant and anti-inflammatory agents effectively, we first examined the inhibitory effect of A. hookeri extracts on production of oxidant stresses (2,2-diphenyl-1-picrylhydrazyl, xanthine oxidase, and superoxide). In addition, we examined the inhibitory effects of A. hookeri on production of pro-inflammatory factors (nitric oxide, prostaglandin E2, inducible nitric oxide synthase, and cyclooxygenase-2) in murine macrophage RAW 264.7 cells stimulated with lipopolysaccharide. Of the sequential solvent fractions of A. hookeri, EtOAc fractions showed decreased production of oxidant stresses, and CH2Cl2 and EtOAc fractions of A. hookeri inhibited production of pro-inflammatory factors. EtOAc fraction inhibited production of pro-inflammatory cytokines (interleukin-6 and -1β). These results suggest that A. hookeri has significant effects on oxidant stresses and pro-inflammatory factors and is a possible antioxidant and anti-inflammatory therapeutic and preventive material.
비인강 폐쇄 부전증 성인 환자에서 인두피판술 수술 후 객관적 언어평가: 증례보고
박종훈(Jong-Hoon Park),김다와(Da-Wa Kim),석현(Hyun Seok),백진아(Jin-A Baek),고승오(Seung-O Ko) 대한구순구개열학회 2021 대한구순구개열학회지 Vol.24 No.1
The purpose of this study is to objectively evaluate the post-surgical aerodynamic and acoustic characteristics of patients with velopharyngeal insufficiency (VPI) who received superiorly based pharyngeal flap surgery. Parameters for post-surgical evaluation of speech improvements vary by study designs, and the availability of objective research data is limited. VPI, also known as velopharyngeal Dysfunction (VPD), is a condition in which the soft palate and muscles of the posterior and lateral wall cannot form a velopharyngeal port. Objective evaluation of velopharyngeal closure is essential in the diagnosis and treatment of VPI. Hypernasality and limitations in speech articulation can be managed through various modalities, including speech therapy, speech-aid prosthetics, and surgical interventions. For patients with severe hypernasality, a superiorly based pharyngeal flap is the most commonly used procedure for the surgical correction of VPI. In this study, three patients (two male, one female) status post superiorly based pharyngeal flap surgery for hypernasality and inaccurate pronunciation were evaluated by a speech-language pathologist. Nasometers were used for objective measurement of post-surgical nasalance scores. The study results confirmed a significant and sustained improvement in nasality post superiorly based pharyngeal flap. Nasalance scores improved or reached normal limits during 1-2 months after surgical procedure, but with a tendency to relapse over time.
수용성 β-1,3-glucans의 면역 활성 효능에 대한 연구
심정현,최원아,김종완,이해숙,백태웅,조민철,이경애,상병찬,윤도영,Shim, Jung-Hyun,Choi, Won-A,Kim, Jong-Wan,Lee, Hae-Sook,Baek, Tae-Woong,Cho, Min-Cheol,Lee, Kyung-Ae,Sang, Byung-Chan,Yoon, Do-Young 대한면역학회 2003 Immune Network Vol.3 No.2
Background: $\beta$-1,3-glucans are well known to enhance the immune reactions, resulting in antitumor, antibacterial, antiviral, anticoagulatory and wound healing activities. $\beta$-1, 3-glucans have various activities depending on molecular weight, degree of branching, conformation, water-solubility and intermolecular association. However, the $\beta$-1,3-glucan linked backbone structure is essential and $\beta$-D-glucopyranosyl units are required for immuno-potentiating activities. Result: In this study, we tested the immunophamacological activities of soluble $\beta$-1,3-glucans and confirmed the following activities: (1) $IFN-{\gamma}$ production in PBMCs in the presence or the absence of PHA, LPS, or IL-18; (2) induction of various cytokines in the spleen and thymus; (3) adjuvant effect on the antibody production; (4) nitrogen oxide synthesis in macrophages; (5) the cytotoxic and antitumor effects on cell lines and ICR mice. Conclusion: These results strongly suggested that $\beta$-1,3-glucans possessed various immuno-pharmacological activities.