• Title/Summary/Keyword: Focus adjustment

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Focus Adjustment Method with Statistical Analysis for an Interchangeable Zoom Lens with Symmetric Error Factors (대칭성 공차를 갖는 교환렌즈용 줌 렌즈의 핀트 조정법과 통계적 해석)

  • Ryu, J.M.;Jo, J.H.;Kang, G.M.;Lee, H.J.;Yoneyama, Suji
    • Korean Journal of Optics and Photonics
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    • v.22 no.5
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    • pp.230-238
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    • 2011
  • There are many types of interchangeable zoom lens in the digital single lens reflex camera and the compact digital still camera system in order to meet various specifications such as the field angle. Thus special cases for which the focus adjustment using only an auto-focus group is not available in the focal point correction (that is, the focus adjustment) of both wide and tele-zoom positions are sometimes generated. In order to make each BFL(back focal length, BFL) coincide at wide and tele-zoom positions with each designed BFL, focus adjustment processes must be performed at least in these two points within the zoom lens system. In this paper, we propose a method of focus adjustment by using the concept of focus sensitivity, and we calculate a limit on focus adjustment distance by means of statistical analysis.

Statistical Analysis of Focus Adjustment Method for a Floating Imaging System with Symmetric Error Factors (대칭형 공차를 갖는 플로팅 광학계의 상면 변화 보정 방법에 대한 통계적 해석)

  • Ryu, Jae Myung;Kim, Yong Su;Jo, Jae Heung;Kang, Geon Mo;Lee, Hae Jin;Lee, Hyuck Ki
    • Korean Journal of Optics and Photonics
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    • v.23 no.5
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    • pp.189-196
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    • 2012
  • A floating optical system is a system that moves more than 2 groups to focus at the camera lens. At the camera optics, the floating system that is mainly used is an optical system such as a macro lens which changes magnification very much. When the floating system is assembled and fabricated in the factory, there are differences between the image plane of the sensor and the focal plane of the infinity or macro state. Therefore, in a considerable proportion of cases, the focus adjustment to minimize the difference of BWD(Back Working Distance) is carried out in the process of manufacturing. In this paper, in order to decide the movement of each group in a floating system, we evaluated the rotation angle of CAM for the focus adjustment. We know that the maximum magnification of macro state is corrected by this numerical method for the focus adjustment, too. We investigated the limit of CAM rotation angle of the system by using statistical analysis for CAM rotation angle, which uses the focus adjustment of the floating system with symmetric error factors.

Adjustment Factors for Family Life of Multi Cultural Family Couples (다문화가정 부부의 가정생활 적응 요인에 대한 연구)

  • Kang, Ki-Jung;Chung, Chun-Seok
    • Journal of Family Resource Management and Policy Review
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    • v.13 no.2
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    • pp.153-167
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    • 2009
  • This research analyzes factors of family life adjustment in mixed-culture families through a focus group and individual interviews with nine mixed-culture couples eighteen people who live in city C. First, the reason that women of other cultures wants to marry Korean men is because they find it a good opportunity, as they expect that Korean husbands will take responsibility of their family. On the other hand, Korean men also expect that they would have some similarities to each other. Also, in southeastern Asian men have more freedom than women to choose an international marriage in Southeastern Asia. Second, mixed-culture couples in everyday life are affected by communication problems, cultural differences, natural environment, financial situation, male -dominant attitude, self-adjustment pressure, house-work role and financial support from their own country. Third, wives from other cultures ask for social support to adjust in Korea and make a healthy family. These women can be important, as they have their own role in the family even though they may be far from their mother in law's strong expectation in how well she can adopt Korean culture.

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A Structural Equation Model on Social Re-Adjustment of Stroke Patients: Based on Roy's Adaptation Model (뇌졸중 환자의 사회재적응 구조모형: Roy의 적응모형에 기반하여)

  • Kim, Jungmi;Kim, Hwasoon
    • Journal of Korean Academy of Nursing
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    • v.53 no.4
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    • pp.480-495
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    • 2023
  • Purpose: This study aimed to develop and test a structural equation model on social re-adjustment of individuals with stroke based on a literature review and Roy's adaptation model. Methods: This study involved 321 participants who had a stroke and visited the outpatient department after discharge. The hypothetical model was developed based on Roy's adaptation model and a comprehensive review of previous literature on the topic. The model comprised four exogenous variables (neurological damage, gender [man], age, and social support) and five endogenous variables (activities of daily living, acceptance of disability, depression, rehabilitation motivation, and social re-adjustment). The data were analyzed using SPSS Windows software version 22.0 and AMOS 23.0. Results: Out of 28 research hypotheses, 18 were supported, and they indicated approximately 64% probability of social re-adjustment. Social re-adjustment is directly and significantly affected by age, social support, activities of daily living, and depression. Social re-adjustment is indirectly affected by neurological impairment, gender (men), age, social support, and rehabilitation motivation. Conclusion: Continuous assistance and care should be provided for individuals with disabilities caused by sudden neurological damage to facilitate gradual improvement in their social re-adjustment. To enhance social re-adjustment, especially among older adults, newly developed interventions should focus on improving their activities of daily living, preventing depression, and enhancing support from family and healthcare personnel.

The Effects of Ego Strength, Failure Tolerance, and Performance Anxiety on School-Age Children's School Class Adjustment: A Focus on Gender Differences (자아강도, 실패내성 및 수행불안이 학령기 아동의 학교수업적응에 미치는 영향: 성별에 따른 차이를 중심으로)

  • Kim, Se Young
    • Korean Journal of Child Studies
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    • v.37 no.2
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    • pp.13-25
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    • 2016
  • Objective: The purposes of this study were to examine the effects of school-age children's ego strength, failure tolerance, and performance anxiety on their school class adjustment, and to model the relation structure of the variables. Method: For these purposes, a questionnaire survey was conducted with 562 6th graders. Results and Conclusion: The results of this study are summarized as follows. First, ego strength, failure tolerance, and performance anxiety were significantly different according to gender. Second, in male students, ego strength, failure tolerance, and performance anxiety had a significant direct effect on school class adjustment. In addition, ego strength and failure tolerance had a significant indirect effect on school class adjustment. Third, female students' paths to school class adjustment were similar to male students' but the effect of failure tolerance on performance anxiety and the effect of performance anxiety on school class adjustment were not significant. Fourth, in the results of multi-group analysis, the effect path from ego strength to school class adjustment was different between male and female students, and the effect was higher in female students than in male students.

Adjustment Experiences of Nursing Students in the Face of COVID-19 (COVID-19를 맞이한 간호대학생의 적응 경험)

  • Im, Sookbin;Choi, Eun-Hi;Lee, Miyoung;Hong, Na Young;Hwang, Do Young;Choi, Yun Bi
    • Journal of the Korean Society of School Health
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    • v.33 no.3
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    • pp.213-221
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    • 2020
  • Purpose: The purpose of this study was to investigate adjustment experiences of nursing students in the face of COVID-19. Methods: The subjects were 4 focus groups consisting of a total of 20 participants, including 18 nursing students and 2 professors. From July to August 2020, focus group interviews were conducted. Results: We identified 15 sub-themes and 4 hemes. The 4 themes were sudden and new situation, changes in daily life due to non-face-to-face contact, becoming in an unfamiliar life, rising to the challenge of the new normal. Conclusion: Participants were experiencing difficult situations, accepting and recognizing them as challenges. It is necessary to conduct further research on how college students experiencing a crisis accept the situation and how they think about it, according to their major. In addition, since this research was conducted through focus group interviews, it is necessary to conduct further research using another research method.

A Study of the Effect of Family Strength on School Adjustment among Adolescents and the Mediating Effect of Social Support - Focus on Middle School Students of the Gyeongnam Region - (가족건강성이 청소년의 학교적응에 미치는 영향 및 사회적 지지의 매개효과 - 경남지역 중학생을 중심으로 -)

  • Sim, Mi Young;Hwang, Soon Keum
    • Journal of Family Resource Management and Policy Review
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    • v.17 no.3
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    • pp.1-17
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    • 2013
  • This study focused on adolescents who are studying in middle schools of the Gyeongnam region, aims to provide methods for improving school adjustment among adolescents through the enhancement of family strength. It will examine the effect of family strength on adolescents' school adjustment verify the mediating effect of social support in the influential relationships of school adjustment. The summarizations, obtained in this study are as follows: First, an analysis of the results of the effect of family strength on social support demonstrated that family strength had a positive effect on social support. That is, as family strength was higher, social support increased. Second, an analysis of the results of the effect of family strength on school adjustment show that family strength would have a direct effect on school adjustment, which is positive. Where family strength was higher, school adjustment of adolescents was also higher. Third, the results of the effect of social support on school adjustment when controlling family strength demonstrate that social support would have a positive effect on school adjustment, however, family strength did not predict school adjustment. Therefore, the complete mediating effect of social support in the relationship between family strength and school adjustment was identified. In conclusion, it was identified that family strength had an indirect effect on school adjustment, but not a direct effect. Therefore, it is indicated that indirect intervention through the social support system as well as direct intervention for the improvement of adolescents' school adjustment is required. In addition, it was confirmed that family strength and social support would be more important variables than control variables, which reflect the characteristics of adolescents and family in terms of school adjustment. Therefore, the recognition that the responsibility in adjusting to school is the common role of families, schools, and community going beyond the individual responsibility of adolescents is needed.

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Multi-focus 3D display of see-through Head-Mounted Display type (투시형 두부 장착형 디스플레이방식의 다초점 3차원 디스플레이)

  • Kim, Dong-Wook;Yoon, Seon-Kyu;Kim, Sung-Kyu
    • Journal of Broadcast Engineering
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    • v.11 no.4 s.33
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    • pp.441-447
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    • 2006
  • See-through HMD type 3D display can provide an advantage of us seeing virtual 3D data used stereoscopic display simultaneously with real object(MR-Mixed Reality). But, when user sees stereoscopic display for a long time, not only eye fatigue phenomenon happens but also de-focus phenomenon of data happens by fixed focal point of virtual data. Dissatisfaction of focus adjustment of eye can be considered as the important reason of this phenomenon. In this paper, We proposed an application of multi-focus in see-through HMD as a solution of this problem. As a result, we confirmed that the focus adjustment coincide between the object of real world and the virtual data by multi-focus in monocular condition.

Towards a Student-centred Approach to Translation Teaching

  • Almanna, Ali;Lazim, Hashim
    • Cross-Cultural Studies
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    • v.36
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    • pp.241-270
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    • 2014
  • The aim of this article is to review the traditional methodologies of teaching translation that concentrate on text-typologies and, as an alternative, to propose an eclectic multi-componential approach that involves a set of interdisciplinary skills with a view to improving the trainee translators' competences and skills. To this end, three approaches, namely a minimalist approach, a pre-transferring adjustment approach and a revision vs. editing approach are proposed to shift the focus of attention from teacher-centred approaches towards student-centred approaches. It has been shown that translator training programmes need to focus on improving the trainee translators' competences and skills, such as training them how to produce and select among the different versions they produce by themselves with justified confidence as quickly as they can (minimalist approach), adjust the original text semantically, syntactically and/or textually in a way that the source text supplely accommodates itself in the linguistic system of the target language (pre-transferring adjustment), and revise and edit others' translations. As the validity of the approach proposed relies partially on instructors' competences and skills in teaching translation, universities, particularly in the Arab world, need to invest in recruiting expert practitioners instead of depending mainly on bilingual teachers to teach translation.