• 한국산학기술학회논문지
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• 제15권12호
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• pp.7093-7100
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• 2014

본 연구의 목적은 산업재해 근로자의 노동시장이행과 관련한 요인들을 분석하는 것이다. 이를 위하여 근로복지공단이 주관하는 제 1차 산재보험패널조사 데이터를 활용하였다. 주요 연구 결과로 첫째, 요양기간 종료 후 비경제활동인구와 실직 중인 대상자가 각각 7.2%, 22.3%에 이르렀다. 둘째, 새로운 일자리로 복귀한 이들 중 기존에 담당하고 있던 직종과 다른 직종에 근무하는 비중이 31.5%였다. 산업재해로 인하여 직장과 직종이 동시에 바뀌는 산재근로자의 노동시장이행 성격을 보여준다. 셋째, 산재 근로자의 노동시장 이행 중 일자리 복귀여부와 관련한 요인을 살펴보면 남성, 낮은 연령대, 교육연수가 높을수록, 요양기간이 짧을수록, 업무수행능력에 대한 주관적 평가가 좋을수록 유의미한 관련성을 보여주었다. 산재 전직장의 규모와 종사상 지위도 관련성을 보여주었다. 직업훈련 경험자 중 일자리로 복귀하지 못한 사람들의 비중이 상대적으로 높았고 장해등급 정도는 관련성을 보여주지 않았다. 마지막으로 분석결과를 토대로 산재근로자의 노동시장이행 각 단계를 고려하여 이행노동시장 관점에서 만들어진 정책의 필요성을 제시하였다.

• 한국자기공명학회논문지
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• 제11권2호
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• pp.64-72
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• 2007

[ $^1H$ ] nuclear magnetic resonance (NMR) experiments have been performed at 30 - 300 K and 7 T to investigate dynamics of hydrogen bond network in the single crystal $(NH_4)_3H(SO_4)_2$. The two proton sites, ammonium proton and hydrogen-bond proton, are identified from the $^1H$ NMR MAS spectrum at 340 K. As temperature decreases, the $^1H$ NMR spectrum shifts to the higher frequency side with a larger linewidth. The spectrum at 65 K shows a distinctive change in line shape toward the ferroelectric transition at 63 K. The measured values of $T_1$ for ammonium and hydrogen-bond protons are similar in the whole range of temperature. $T_1$ of $^1H$ NMR shows a gradual decrease down to 120 K and starts to steeply increase below 100 K. Then $T_1$ shows abrupt decrease below 70 K with a sharp minimum at 63 K, where the ferroelectric transition occurs. This temperature dependence of spectrum and $T_1$ clearly prove that the large change in the dynamics of hydrogen bond network is associated with the ferroelectric phase transition at 63 K.

• 대한화학회지
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• 제29권1호
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• pp.15-22
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• 1985

25$^{\circ}C$ 아세톤속에서 벤조일화합물과 피리딘류와의 친핵성치환반응을 속도론적으로 연구하였다. 전이상태 파라미터 $_{\rho}_S$, $_{\rho}_N$, ${\beta}$값으로 보아 생성물을 닮은 전이상태를 갖는 synchronous S$_N$2 반응메카니즘을 예상할 수 있었다. Potential Energy Surface 모형으로서 S$_N$2 반응메카니즘의 규명은 가능했으나 결합형성이 많이 진전되고 결합의 파괴는 약간 진전된 생성물에 더 가까운 전이상태 변화의 예측과 이탈능력 증가(Cl- ＜ CN-)에 따르는 전이상태 변화의 예측은 불가능하였다. Quantum mechanical 모형의 적용으로 이들 반응의 전이상태 역시 생성물을 닮은 구조임을 알 수 있었고 CN-이 Cl-보다 이탈능력이 좋음을 예측할 수 있었다.

• 한국과학교육학회지
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• 제17권2호
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• pp.139-148
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• 1997

This study investigated the influences of the cooperative learning strategies upon students' achievement and their perceptions of learning environments in a middle school physical science course. Prior to instruction, the Group Assessment of Logical Thinking was administered, and its score was used as a blocking variable. Mid-term examination score was used as a covariate. For the treatment group with heterogeneous grouping, cooperative learning instruction (the Learning Together model) was used, which emphasized group reward, individual accountability, and role division. For the control group, traditional instruction was used. After instruction, an achievement test consisting of three subtests (knowledge, understanding, and application), and the perception questionnaire of classroom and laboratory environments, were administered. ANCOVA results revealed that there was a significant interaction between instruction and the level of logical reasoning ability although there were no significant differences in all three subtest scores of the achievement test. For the concrete operational reasoners, the treatment group performed better in the subtests of understanding and application than the control group. For students at the formal and transition levels, however, the treatment group scored lower than the control group. Significant interactions were also found in the perceptions of classroom environment and laboratory environment. For the concrete operational reasoners, the treatment group showed more positive perception than the control group. For the students at the formal and transition levels, the control group had positive perception than the treatment group. Educational implications are discussed.

• Computers and Concrete
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• 제21권1호
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• pp.67-74
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• 2018

A differential scheme based micromechanical framework is proposed to obtain the effective properties of the saturated concrete repaired by the electrochemical deposition method (EDM) considering the interfacial transition zone (ITZ) effects. The constituents of the repaired concrete are treated as different phases, consisting of (micro-)cracks, (micro-)voids and (micro-)pores (occupied by water), deposition products, intrinsic concrete made up by the three traditional solid phases (i.e., mortar, coarse aggregates and their interfaces) and the ITZs. By incorporating the composite sphere assemblage (CSA) model and the differential approach, a new multilevel homogenization scheme is utilized to quantitatively estimate the mechanical performance of the repaired concrete with the ITZs. The CSA model is modified to obtain the effective properties of the equivalent particle, which is a three-phase composite made up of the water, deposition products and the ITZs. The differential scheme is employed to reach the equivalent composite of the concrete repaired by EDM considering the ITZ effects. Moreover, modification procedures considering the ITZ effects are presented to attain the properties of the repaired concrete in the dry state. Results in this study are compared with those of the existing models and the experimental data. It is found that the predictions herein agree better with the experimental data than the previous models.

• Bulletin of the Korean Chemical Society
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• 제27권12호
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• pp.2002-2010
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• 2006

This study examined the quenching of ofloxacin (OFL) and flumequine (FLU) fluorescence by $Cuj^{2+}$, $Ni^{2+}$, $Co^{2+}$ and $Mn^{2+}$ in an aqueous solution. The change in the fluorescence intensity and lifetime was measured at various temperatures as a function of the quencher concentration. According to the Stern-Volmer plots, the fluorescence emission was quenched by both collisions (dynamic quenching) and complex formation (static quenching) with the same quencher but the effect of static quenching was larger than that of dynamic quenching. Large static and dynamic quenching constants for both OFL and FLU support significant ion-dipole and orbital-orbital interactions between fluorophore and quencher. For both molecules, the static and dynamic quenching constants by $Cu^{2+}$ were the largest among all the metal quenchers examined in this study. In addition, both the static and dynamic quenching mechanisms by $Cu^{2+}$ were somewhat different from the quenching caused by other metals. Between $Ni^{2+}$ and FLU, a different form of chemical interaction was observed compared with the interaction by other metals. The change in the absorption spectra as a result of the addition of a quencher provided information on static quenching. With all these metals, the static quenching constant of FLU was larger than those of OFL. The fluorescence of OFL was quite insensitive to both the dynamic and static quenching compared with FLU. This property of OFL can be explained by the twisted intramolecular charge transfer in the excited state.

• 한국환경교육학회지:환경교육
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• 제20권1호
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• pp.42-61
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• 2007

This study investigated the effect of the environmental issue analysis instruction on the decision making ability of middle school students. A pretest-posttest control group design was employed. The participants for the research were 288 1st grade male students in middle school in Seoul, the environmental issue analysis lesson group consisted of 142 members and the non-environmental education group consisted of 146 members. The cognitive level of the students were divided into three groups-concrete, transition, formal-as the result of GALT test. Students take issue analysis lessons during 6 weeks, one lesson per a week. Students had studied through worksheets reconstructed and developed by researcher on basis of issue analysis suggested by Ramsey et al. (1997). The results of the research were followings: After lesson for environmental issue analysis, all of the students were improved in decision-making ability regardless of cognitive level (p<.05). Especially, decision-making ability of the transition group students was improved to a high degree. Scores of searching relevant information, generation of alternatives, identification of values for selection criteria, the evaluation of alternatives' merits and demerits, prediction of consequence were increased in experimental group (p<.05). But the ability of selection of alternatives according to value was not reached statistically meaningful improvement. The decision-making ability of the control group students was not improved but ability of selection of alternatives, the evaluation of consequence were increased (p<.05).

• 임상간호연구
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• 제27권2호
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• pp.149-164
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• 2021

Purpose: The purpose of this study was to develop a Korean Nurse Residency Program (KNRP) in order to facilitate new nurses' transition to clinical practice working at tertiary hospitals in Korea. Methods: The KNRP was developed through a literature review, investigation of NRP cases in United States, two rounds of expert consultation, and appropriateness survey. For appropriateness survey of the program, a questionnaire with 118 items and 14 subcategories including overview and operation of KNRP, education programs, staffing criteria for new nurses' education, preceptor supporting strategies, evaluation standards for new nurse's education, infrastructure, and KNRP benefits was used. Data were collected from 369 nurses including nurse educators, nurse managers, preceptors, and new nurses working at 43 tertiary hospitals in Korea from February 16, 2021 to March 22, 2021. Data were analyzed with descriptive statistics. Results: Appropriateness score of KNRP was 3.42±0.31 (out of 4) and those of 14 subcategories ranged from 3.18±0.47 to 3.58±0.46. The final version of the KNRP postulated is a one-year program, which is composed of off-job training and on-site training including preceptorship over 3 months, and competency reinforcement and adaptation supporting programs. Conclusion: The application of the one-year KNRP will facilitate new graduate nurses' transition to clinical practice. In order for effective application of the KNRP, cooperative efforts of the government, professional associations, and hospitals are needed.

• 한국간호교육학회지
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• 제19권3호
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• pp.307-319
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• 2013

Purpose: The purpose of this study was to review nursing studies with regard to simulation- based learning in Korea. Methods: This systematic review examines the literature on simulation in nursing education from 2003 to 2012. The electronic databases reviewed included: RISS, the National Assembly Library, the National Library of Korea, and major nursing journal databases in Korea. The MeSH search terms included nursing, simulation, simulator, and standardized patient. Results: In total, 52 studies were included in the literature review. We included 21 quasi-experimental studies and 25 studies using high-fidelity simulation. They included knowledge and problem-solving ability in the cognitive domain; self efficacy, learning satisfaction, interpersonal relationships and communication, and confidence in the affective domain; and clinical performance ability and learning performance evaluation in the psychomotor domain. This systematic literature review revealed that simulation is useful in nursing education but uncovered a gap in the literature pertaining to the transfer of knowledge to performance and how to learn from cognitive reflection. Conclusions: This result suggests that it is necessary to conduct additional research on the cognitive learning process and transition to performance.

• 컴퓨터교육학회논문지
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• 제16권6호
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• pp.83-94
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• 2013

최근의 국가간 정치, 경제, 사회, 문화적인 측면에서의 교류와 협력이 활발해지면서 글로벌 세계에 대한 인식이 점차 높아지고 있다. 이러한 글로벌 시대에 맞는 인재를 양성하기 위해서는 그동안의 국가 중심의 교육에서 벗어나 글로벌 시대에 적합한 교육으로의 전환이 필요하다. 최근의 스마트기기의 폭팔적인 보급의 영향으로 스마트교육이라는 새로운 교육의 패러다임이 등장하였다. 스마트교육 환경의 특징인 고도로 연결된 사회에서 활발한 상호작용과 적극적인 참여와 협력 등은 보다 효과적으로 글로벌 학습을 지원할 수 있게 하였다. 본 연구에서는 스마트교육 환경에서 효과적으로 글로벌 학습을 지원하기 위한 교수 학습 모형을 제안한다.