• 천문학회보
• /
• 제40권2호
• /
• pp.56.4-57
• /
• 2015

We present the optical design and a sensitivity analysis for a wide field of view (FOV) instrument operating at UV and IR wavelengths. The ongoing investigation is performed in collaboration with Omnisys Instruments (Sweden) and focuses on a telluric-limb-viewing instrument that will fly in a low Earth orbit to study mesospheric wave structures over a wide range of horizontal scales in the altitude range 80 - 100 km. The instrument has six wavelength channels which consist of 4 channels of IR and 2 of UV. We are proposing an optical design based on three mirror aplanatic off-axis reflective system. The entrance pupil diameter and effective focal length are 45 mm and 270 mm, respectively. The FOV is $5.5^{\circ}{\times}1^{\circ}$ and the secondary mirror is set for stop. The optical specification is required to have an encircled energy of at least 80 % within a diameter of 21 um. We performed sensitivity analysis for the longest wavelength of 772 nm in consideration of the diffraction limit of system. The results show that tolerance limits for positions and angles of the mirrors are not very sensitive compared with typical error budgets of manufacturing and assembling process. The secondary mirror has the most sensitive tolerance for surface figure of 250 nm in root-mean-square.

• 보건교육건강증진학회지
• /
• 제32권4호
• /
• pp.93-108
• /
• 2015

Objectives: The purpose of this study was to investigate the current state of health literacy research and to explore the directions of improvement health literacy in Korea. Methods: A review of literature was conducted via an electronic database and citation tracking reference. A total of 173 articles were identified, where and then 41 articles were selected for review that met the inclusion criteria. Two authors independently reviewed the articles using the matrix table and together examined together the three aspects of the studies: research methods, health literacy instrument, and results. Results: Most of the articles were descriptive-correlation studies, but there were one intervention study and six methodology studies that were developing health literacy measures and instrument related items and etc. More troubling sufficient samples and sampling methods were lacking at the population level. The validity of the used health literacy instruments was not sufficient reported. Conclusions: Health literacy instruments need to be validated in various population and contexts. Additionally, effective strategies to improve health literacy included teach-back, pictogram, and decision aids need to be tested in Korean health care system.

• Journal of the Korean Wood Science and Technology
• /
• 제49권1호
• /
• pp.82-92
• /
• 2021

Nakdong technique is an unfamiliar scorching treatment using an iron heated in a kiln over 1000℃. It is a typical convention in Asian countries to treat Nakdong on the surface of paulownia species. The scorching treatment changes the surface characteristics as well as the color of the wood. This study focused on the effects of functional features such as water resistance, anti-mold, anti-termite, and sound improvement because this treatment is usually used on paulownia wood-bodied musical instruments surface. It took 28'57" for Nakdong-iron treated surface to absorb a droplet of water. The absorbance time of iron treated surface was longer than that of torch treated one. There was no noticeable effect on the anti-mold test. On the anti-termite test, there was nearly 3% more mean mass loss on the torch samples than controlled and iron treated ones. In examining the sound radiation coefficient before and after Nakdong treatment, the Nakdong-iron treated surface showed an increase in the average value of 1.2 m4/kg s, which means that it has sound quality improvement. Through this research, the Nakdong technique results are expected to be used as basic-data for further research and give a practical idea for using the traditional treatment method on the wood surface.

• 한국학교보건학회지
• /
• 제36권3호
• /
• pp.71-81
• /
• 2023

Purpose: This study aimed to investigate the trends in domestic research related to health literacy in children and adolescents. Methods: Six journal articles and four dissertations or theses related to health literacy in children and adolescents were analyzed according to the following criteria: study aim, research design, study population and sample size, sampling method, health literacy variables, and characteristics of health literacy measurement instruments. Result: The majority of studies focused on general children and adolescents. Correlational studies were most prevalent, while no experimental study was identified at all. The variable most frequently explored in relation to health literacy was health promoting behaviors. Functional health literacy instruments, assessing numeracy and reading comprehension, were most commonly used to evaluate child and adolescent health literacy. Conclusion: Considering the emphasis on health literacy improvement in order to achieve health equity across the entire life cycle, there is a need for both quantitative and qualitative growth in domestic health literacy studies for children and adolescents. School-based interventions are essential for enhancing health literacy. Furthermore, it is also necessary to develop an instrument to measure health literacy of children and adolescents that can be utilized and monitored at the national level.

• 재활간호학회지
• /
• 제3권2호
• /
• pp.154-168
• /
• 2000

This study was done to analyze the trends of research on stroke in Korea, to suggest future direction, for research on stroke. This article reviewed 75 nursing research papers on stroke done since 1990 to 2000 by examining them according to the period of publication or presentation, research design, type of subjects, measurement variables, the intervention outcome of experimental research, and theme of qualitative research. The research were as follows : 1. 26 of 75 studies were composed of master thesis and dissertation of graduate school. There were 53 nonexperimental research, 15 experimental research, and 7 qualitative studies design. 2. Stroke patients subject' Characteristic were 44 and Family and Spouses of caregiver support were 28 of total studies. 3. Most measurement instruments used for research were translated and redesigned it into Korean that developed by foreigners, and development measurement instruments used Kang's ADL. 4. Family support and Social support was shown the frequently among correlational research. 5. Methodological research were development of an evaluation tool for the quality of nursing care in stroke patients, caregiver support of development of nursing intervention list, and Home care Nursing Intervention protocol, and development of client selection criteria based on the needs of services to be offered. 6. The experimental research of intervention were mostly education nursing intervention, rehabilitation program on functional recovery, support nursing intervention, and applying a home care protocol on the nursing care intervention. 7. Theme of qualitative research were family experience, home care in family experience, soobal experience, illness experience, hope of Stroke patients and so on. Phenomenologic methodology and Granded Theory was designed of Qualitative research. On the basis of the above finding the following recommendations are made: 1. It's necessary to develop a reliable and variable measurement tool for stroke patients and family care of stroke patients. 2. It's necessary to study the comparison of Nursing Studies of stroke research abroad, the replication to establish the effect of nursing intervention stroke patients and family care of stroke patients.

• 유통과학연구
• /
• 제10권11호
• /
• pp.89-99
• /
• 2012

Purpose - Mobile devices, especially mobile terminals capable of telecommunication and wireless connectivity, are leading the advancements in consumer electronics. Digital convergence drives the functions of various devices, such as cellular phones, MP3 players, personal digital assistants, and gaming, into a single device. This trend would continue and applications such as digital audio and video streaming (including personalized content delivery mechanisms) would soon be on a handheld device. As customers want mobile convergence devices, manufacturers are driving new initiatives in the emerging mobile device market. Given the roles played by device design and service content in user satisfaction of a mobile convergence device, this study focuses on identifying and measuring the constructs for the process by which user satisfaction is achieved. This study synthesizes the expectation-disconfirmation paradigm with empirical theories in user satisfaction. Device and service levels are separated, and nine key constructs for user satisfaction of mobile convergence devices are proposed. Insight into this process could help web-based businesses to improve user satisfaction, thus enhancing the effectiveness of e-commerce for sellers and buyers. Research design, data, methodology - This study draws on three users of mobile convergence devices as examples. To test there search model and hypotheses, survey questionnaires were sent to 607 mobile device users. Mobile device users were initially identified from several members, and subjects were randomly drawn. Data from 577 survey responses were finally analyzed. The unit of measurement and analysis in this research study is at a personal level. Results - The measurements for the constructs were developed and tested in a two-phase study. In the first phase, the device and service dimensions were identified, and instruments for measuring them were developed and tested. In the second phase, using the salient dimensions of the device and service as the formulating first-order factors, instruments were developed and empirically tested to measure satisfaction of the device and service. In measuring satisfaction of mobile convergence devices, the critical tasks are to identify the key constructs of such user satisfaction and to develop validated instruments to measure them. Hence, the results of this study have immediate implications for businesses and for research in user satisfaction of mobile convergence devices. Conclusions - This study provides reliable instruments for operationalizing key constructs in the analysis of user satisfaction of mobile convergence devices within the expectation-disconfirmation paradigm. Hence, convergence device makers will be able to examine whether their websites meet their customers' expectations by examining the device aspect of the mobile convergence device customers, and the service aspect expectations and disconfirmation. Moreover, the introduction of expectation and disconfirmation constructs brings the marketing aspect of convergence devices into focus for such retailers, an aspect crucial to the effective design of websites for online businesses. In addition,this study provides the metrics required to initiate future studies on user satisfaction of mobile convergence devices.

• 한국콘텐츠학회논문지
• /
• 제13권3호
• /
• pp.456-467
• /
• 2013

본 연구는 온라인 수업의 학업성취를 높이기 위하여 학습도구의 개발과 자기조절학습 강화를 위한 기초자료를 제공하기 위한 것이다. 이를 위해 사이버대학의 온라인 수업에서 사용되는 학습도구-강의, 과제, 참여도구-와 자기조절학습, 학업성취 간의 관계를 실증적으로 분석하였다. 사이버대학교에서 인간복지학부 수강생들을 대상으로 수집된 설문지 226개를 구조방정식모형을 이용하여 분석하였다. 연구결과, 강의, 과제, 참여도구는 모두 자기조절학습-인지, 초인지, 관리-전략에 긍정적 영향을 보였고, 자기조절학습도 학업성취에 유의미한 영향을 나타내었다. 그러나 학습도구는 학업성취에 대한 직접적 영향을 나타나지 않았고, 초인지전략을 매개로 하여 학업성취에 영향을 보였다. 즉 학습도구의 개발은 학습자들의 자기조절학습의 강화전략과 연계된 개발이 필요함을 알 수 있다.

• 대한치과의사협회지
• /
• 제55권10호
• /
• pp.688-694
• /
• 2017

Objectives: This preliminary study compared the effects of glide path establishing instruments prior to substantial root canal preparation. Materials and Methods: Glide path was established by enlargement of the 2nd mesiobuccal root canal of Dentalike by using three kinds of glide path preparation nickel-titanium file; PathFile, One G and ProGlider. The pre- and post-instrumented Dentalikes were weighed in the resolution of 1 / 10mg. In addition, after glide path preparation, torque generated during shaping using the WavoOne file was measured. The data were analyzed by one-way ANOVA and Tukey post-hoc test at a significance level of 95%. Results: The ProGlider had the significantly larger amount of reduced weight than other instrument groups (p < 0.05). There was no significant difference between group of glide path preparation with ProGlider and without glide path preparation in maximum torque and total stress generation during the shaping with WaveOne. Conclusions: Glide path preparation instruments may have different efficiency according to their geometries. The Dentalike artificial teeth were revealed to have discrepancies in the size of root canals by microCT examination. It is impossible to make a meaningful judgment of the results due to the reliability or resolution problem of the root canal size of the artificial tooth selected as the standardized tooth.

• 복식
• /
• 제54권4호
• /
• pp.75-84
• /
• 2004

Stage costumes perform not only the instrumental but also the expressive functions. The major goal of this study is to develop the functional and aesthetic costume designs for musical players considering the characteristics of instruments. players’ postures. The scope of this study is restricted to the musical costumes for female adult soloists playing the wind and string instruments. This study is composed of theory research, empiricalresearch and manufacturing a real costume. First, theory research contains theory of musical costumes and that of pure musical areas. Concept, characteristics and wearing effects are analysed in theory of musical costumes. Second, designs of instruments and playing postures are analysed in the theory of pure musical areas. Proper and improper designs are compared based on the survey asking the favorite designs of 56 wind and string players. Third, I manufacture a stage costume for a harpist. The conclusions of this study are as follows. First, wind and string players think the functionality of costumes more importantly than the esthetic sense. And there are differences in design preferences for different playing postures. Second, string Players basically use arms, fingers and the upper body. Wind players use fingers more than string players and do abdominal breathing. Third, string players think the design of arms and sleeves because of frequent usage of bow and prefer the design without sleeves. On the contrary, wind players think the silhouette importantly because of standing playing posture. Fourth, players don't think that the accessory is not important and want it so long as it doesn't hinder playing. Fifth, shoes plays more important role than costume in case of playing posture with using pedals and moving legs frequently. Lastly, both wind and string players prefer the design with simplicity and comfort most.

• 융합정보논문지
• /
• 제10권1호
• /
• pp.1-12
• /
• 2020

정부는 기업의 R&D 활동을 촉진하기 위해 자금지원 정책을 펼치고 있다. 공공 자금지원이 기업의 R&D 투자에 미치는 영향을 다룬 기존 문헌들은 주로 단일 정책에 초점을 두며 다른 정책도구의 잠재적인 영향을 고려하지 않는 한계가 있었다. 이에 본 연구는 중소기업에 중심을 두고 대표적인 재정지원 도구인 자금지원과 세제지원의 조합이 R&D 투자에 미치는 영향을 살펴보았다. 중소기업기술통계조사 3개년 (2015-2017) 자료를 기반으로 고정 효과모형을 통해 분석한 결과는 다음과 같다. 먼저, 정책조합은 중소기업 R&D 투자에 정적인(+) 영향을 주며, 상호 보완적이다. 둘째, 조세지원의 영향을 통제하는 경우에도 자금지원은 중소기업 R&D 투자와 정적인(+) 관계를 가진다. 이러한 결과는 중소기업의 R&D 투자 촉진을 위한 우리나라의 재정지원에 대한 정당성을 의미한다. 또한 자원과 역량에 대한 제약이 있는 중소기업에게 있어 특히 자금지원이 유용한 정책수단으로 적용될 수 있음을 시사한다.