• 한국광학회지
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• 제25권2호
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• pp.90-94
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• 2014

편광기와 1/4 파장판을 이용한 레이저 출력경을 적용한 반도체 포화 흡수체에 의해 Q-스위칭된 Yb:YAG 레이저를 제안하고 그 출력 특성을 조사하였다. 설치된 1/4 파장판의 회전각을 변화시킴으로써 레이저 출력을 가변시킬 수 있음을 보였다.

• 한국보육지원학회지
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• 제17권4호
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• pp.129-154
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• 2021

Objective: This research examines the understanding of the competencies required from the director of a childcare center. It also analyzes the characteristics of the capabilities of a director of a daycare center. The research questions are as follows: First, what are the competencies of a childcare center director? Second, what are the characteristics of the competencies of a childcare center director? Methods: In this study, the Q methodology was applied. First, the Q population was identified based on prior studies and through open questionnaires and in-depth interviews targeting 71 teachers and directors of childcare centers. Next, 40 Q samples were selected. Second, P samples were selected targeting the 30 directors, Q sort was conducted, and the data were analyzed using the QUANL program. Results: The main results of this study can be summarized as follows. First, four types of competencies were demanded from the director of a daycare center. Second, the competencies required from the director of a daycare center were accountability-centered, functional-management-centered, human-relationshipcentered, and rationality-centered capabilities. Conclusion/Implications: The policy-level of and educational ways to support the competencies of a director of a daycare center were discussed.

• 한국인터넷방송통신학회논문지
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• 제13권3호
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• pp.93-101
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• 2013

본 논문은 경쟁업체 $F_B$가 q개의 상점을 운영하고 있는 상황에서 신규 업체 $F_A$가 시장 점유율을 최대로 하는 p,(p$V=V{\backslash}F_B$ 후보 노드들 중 최단거리를 기준으로 최대로 확보한 상위 노드들 q개를 선택하였다. q개 노드에 대해 포함-배제 원리를 적용하여 p개의 확보 고객수 합을 구해 경쟁을 통해 최대 값을 가진 노드 집합을 $F_A$의 상점 위치로 결정하는 경쟁 알고리즘이다. 제안된 경쟁 알고리즘은 q=5에 대해 p1,2,3,4의 상점 위치를 최적으로 간단히 결정하였으며, 시장 점유율도 최대로 높일 수 있음을 보였다.

• Child Health Nursing Research
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• 제4권1호
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• pp.116-127
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• 1998

The purpose of this study was to examine the reliability of Q-sorting and to develope a typology of coping to stress in school-age children through the use of Q-methodology. For the study, Q-statements are selected from the literature and interviews of 30 Children, A total number 153 statement were collected and 31 Q-samples were finally selected. AP-sample of 76 was selected the elementary school children. Each of respondents were given 31 coping strategies questionnaire and set of 31 statements with cartoon on each of cards and sorted them according to the 9-point scale. The result of the C-sorting by each subject were coded and analyzed using the QUANAL PC and SPSS PC＋ program. As a result of the analysis, There were significant relationship between score each item of question naire and score of sorted statement. Therefore, school-age children was able to Q-sorting(forced normal distribution). Also, the four types of coping were named as follows : Type I (n=35) : To search for the dynamic behaviors Type II (n=12) : To search for the intellectual behaviors Type III (n=22) : To search for emotional-spiritual behaviors Type IV (n=7) : To search for the self-abuse behaviors Throught the study, the implication for teachers, parents and school nurses is that there is needed to guide and to support adaptive coping behaviors. Also, it is recommended that the application of Q-methodology for study of children's subjective concepts like stress and coping.

• 한국콘텐츠학회논문지
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• 제17권2호
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• pp.384-393
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• 2017

본 연구는 학령기 경계선 지능 아동을 대상으로 Q방법론을 적용하여 '학교'에 대한 주관적 인식유형과 특성을 파악하고자 하였다. Q표본은 학계 및 현장전문가 4인, 경계선 지능 아동 4인에 대한 심층면접과 관련 문헌고찰을 통해 21개를 선정하였고, P표본은 초등학교에 재학 중인 경계선 지능 아동 총 18명의 학부모와 본인의 동의를 거쳐 표집하였다. P표본은 5점 척도의 정규분포로 Q분류를 실시하였고 수집된 데이터는 Quanl PC 프로그램을 통해 분석하였다. 연구결과 학령기 경계선 지능아동의 학교에 대한 태도유형은 '참여적-의존형'과 '방관적-위축형'의 두 가지 유형으로 도출되었다. 본 연구결과를 통해 학교에 대한 태도는 아동의 자존감 및 가족 지지환경의 양상에 따라 달라질 수 있으며 각 유형별 소속감의 욕구와 안전의 욕구에 대한 적절한 교육복지적 개입이 필요함을 알 수 있었다. 본 연구결과는 경계선 지능아동의 학교에 대한 주관적 유형을 구체화함으로써 경계선 지능 아동이 초등교육을 통해 중등교육 이상의 교육 권리와 학습의 질을 유지하도록 돕기 위한 교육중재 방안에 기초자료를 제공했다는 점에서 함의가 있다.

• Journal of Microbiology and Biotechnology
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• 제21권5호
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• pp.494-502
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• 2011

Coenzyme $Q_{10}$ ($CoQ_{10}$) is a widely used supplement in heart diseases treatment or antioxidative dietary. The microbial production of $CoQ_{10}$ was enhanced by addition of solanesol and novel precursors recovered from waste tobacco. The novel precursors were separated by silica gel and identified as ${\alpha}$-linolenic acid (LNA) and butylated hydroxytoluene (BHT) based on the effect on $CoQ_{10}$ production and GC-MS. The effects of novel precursors on $CoQ_{10}$ production by Sphingomonas sp. ZUTE03 were further evaluated in a two-phase conversion system. The precursor's combination of solanesol (70 mg/l) with BHT (30 mg/l) showed the best effect on the improvement of $CoQ_{10}$ yield. A maximal $CoQ_{10}$ productivity (9.5 mg $l^{-1}$ $h^{-1}$) was achieved after 8 h conversion, with a molar conversion rate of 92.6% and 92.4% on BHT and solanesol, respectively. The novel precursors, BHT and LNA in crude extracts from waste tobacco leaves, might become potential candidates for application in the industrial production of $CoQ_{10}$ by microbes.

• Journal of Photoscience
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• 제12권3호
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• pp.175-183
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• 2005

Plants dissipate excess excitation energy from their photosynthetic apparatus by a process called non-photochemical quenching (NPQ). The major part of NPQ is energy dependent quenching (qE) which is dependent on the thylakoid pH and regulated by xanthophyll cycle carotenoids associated with photosystem (PS) II of higher plants. The acidification of the lumen leads to protonation and thus conformational change of light harvesting complex (LHC) proteins as well as PsbS protein of PSII, which results in the induction of qE. Although physiological importance of qE has been well established, the mechanistic understanding is rather insufficient. However, recent finding of crystal structure of LHCII trimer and identification of qE mutants in higher plants and algae enrich and sharpen our understanding of this process. This review summarizes our current knowledge on the qE mechanism. The nature of quenching sites and components involved in this process, and their contribution and interaction for the generation of qE appeared in the proposed models for the qE mechanism are discussed.

• 대한수학회지
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• 제59권5호
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• pp.843-867
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• 2022

Maynard proved that there exists an effectively computable constant q1 such that if q ≥ q1, then $\frac{{\log}\;q}{\sqrt{q}{\phi}(q)}Li(x){\ll}{\pi}(x;\;q,\;m)<\frac{2}{{\phi}(q)}Li(x)$ for x ≥ q8. In this paper, we will show the following. Let 𝛿1 and 𝛿2 be positive constants with 0 < 𝛿1, 𝛿2 < 1 and 𝛿1 + 𝛿2 > 1. Assume that L ≠ ℚ is a number field. Then there exist effectively computable constants c0 and d1 such that for dL ≥ d1 and x ≥ exp (326n𝛿1L(log dL)1+𝛿2), we have $$\|{\pi}_C(x)-\frac{{\mid}C{\mid}}{{\mid}G{\mid}}Li(x)\|\;{\leq}\;\(1-c_0\frac{1og\;d_L}{d^{7.072}_L}\)\;\frac{{\mid}C{\mid}}{{\mid}G{\mid}}Li(x)$$.

• 대한수학회보
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• 제50권2호
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• pp.583-588
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• 2013

In this paper, we introduce the $q$-analogue of $p$-adic log gamma functions with weight alpha. Moreover, we give a relationship between weighted $p$-adic $q$-log gamma functions and $q$-extension of Genocchi and Euler numbers with weight alpha.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.45-50
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• 2010

EPCglobal Class-1 Gen-2 standard proposed Q-algorithm to select a frame size for the next query round. Q-algorithm calculates the frame size without estimating the number of tags. Therefore, the Q-algorithm has advantage that the reader's algorithm is simpler than other algorithms. However, it is impossible to allocate the optimized frame size. Also. the conventional Q-algorithm does not define an optimized parameter value C for adjusting the frame size. In this paper, we propose a modified Q-algorithm with the tag number estimation scheme, and evaluate the performance with computer simulations.