• 생태와환경
• /
• 제45권4호
• /
• pp.420-443
• /
• 2012

An Individual-Based Model (IBM) was developed by employing natural and toxic survival rates of individuals to elucidate the community responses of benthic macroin-vertebrates to anthropogenic disturbance in the streams. Experimental models (dose-response and relative sensitivity) and mathematical models (power law and negative exponential distribution) were applied to determinate the individual survival rates due to acute toxicity in stressful conditions. A power law was additionally used to present the natural survival rate. Life events, covering movement, exposure to contaminants, death and reproduction, were simulated in the IBM at the individual level in small (1 m) and short (1 week) scales to produce species abundance distributions (SADs) at the community level in large (5 km) and long (1~2 years) scales. Consequently, the SADs, such as geometric series, log-series, and log-normal distribution, were accordingly observed at severely (Biological Monitoring Working Party (BMWP<10), intermediately (BMWP<40) and weakly (BMWP${\geq}50$) polluted sites. The results from a power law and negative exponential distribution were suitably fitted to the field data across the different levels of pollution, according to the Kolmogorov-Smirnov test. The IBMs incorporating natural and toxic survival rates in individuals were useful for presenting community responses to disturbances and could be utilized as an integrative tool to elucidate community establishment processes in benthic macroin-vertebrates in the streams.

• 한국음향학회지
• /
• 제23권5호
• /
• pp.410-419
• /
• 2004

본 논문에서는 베이시안에 기반한 신뢰도 융합 기법을 제안한다. 음성인식에서 신뢰도는 인식 결과에 대한 신뢰의 정도를 말하며, 인식 결과가 맞는 지의 여부를 판단할 수 있다. 개별 신뢰도 기법의 신뢰도 값을 융합하여 최종 판단을 내리는 집중형 융합 방식과 개별 신뢰도 기법의 판단 결과들을 융합하는 분산형 융합의 두 가지 방식에 대해 최적의 베이시안 융합규칙이 제시되었다. 고립단어 인식에서의 미등록어 거절 실험 결과 집중형 베이시안 신뢰도 융합 기법은 개별 신뢰도 기법에 비해 13% 이상의 상대적인 에러 감소 효과를 보였으나, 분산형 베이시안 융합은 성능의 향상을 보이지 못했다.

• 지식경영연구
• /
• 제18권1호
• /
• pp.139-157
• /
• 2017

This study proposed that a relationship exists between individual emotions and knowledge sharing (KS) intentions in competitive online advice communities. Through statistical analysis of 220 valid questionnaires collected from qualified community members, we found that individuals' intentions to contribute knowledge were enhanced by playfulness and reciprocity, while their intention to seek knowledge from others was facilitated significantly by needs fulfillment, sense of competition, and playfulness. In addition, we found that playfulness was a common factor that affected the intention to seek, as well as to contribute, knowledge. Specifically, playfulness was a highly significant individual emotion that affected both individuals' intention to contribute and seek knowledge, while reciprocity was significant primarily in individuals' intentions to contribute knowledge. Needs fulfillment and sense of competition were significant emotions that affected primarily individuals' intentions to seek knowledge. Interestingly, the factors that affected the intention to seek knowledge were consistent both in all participants and in the high-level fear group. However, in the low-level fear group, playfulness influenced KS intentions.

• 감성과학
• /
• 제22권4호
• /
• pp.65-74
• /
• 2019

Extant research has proposed that the Object-Spatial-Verbal cognitive style can elucidate individual differences in the preference for modality-specific information. However, no studies have yet ascertained whether this type of information processing evinces structural correlations in the brain. Therefore, the current study used voxel-based morphometry (VBM) analyses to investigate individual differences in gray matter volumes based on the Object-Spatial-Verbal cognitive style. For this purpose, ninety healthy young adults were recruited to participate in the study. They were administered the Korean version of the Object-Spatial-Verbal cognitive style questionnaire, and their anatomical brain images were scanned. The VBM results demonstrated that the participants' verbal scores were positively correlated with regional gray matter volumes (rGMVs) in the right superior temporal sulcus/superior temporal gyrus, the bilateral parahippocampal gyrus/fusiform gyrus, and the left inferior temporal gyrus. In addition, the rGMVs in these regions were negatively correlated with the relative spatial preference scores obtained by individual participants. The findings of the investigation provide anatomical evidence that the verbal cognitive style could be decidedly relevant to higher-level language processing, but not to basic language processing.

• Educational Technology International
• /
• 제13권1호
• /
• pp.207-231
• /
• 2012

The purpose of this study is to analyze the effects of Critical Thinking Strategy supporting argumentation activities between learners. The research question is whether the form of Critical Thinking Strategy offered to support meaningful interaction of collaborative argumentation between learners influences the knowledge acquisition, learning outcome, and student satisfaction. For this, the collaboration outcome of the group, the level of individual knowledge acquisition, the level of students satisfaction were measured as outcome of argumentation activity and their differences analyzed. This study concludes the following: A comparison of the group that was provided with Critical Thinking Strategy (test group) and the group provided with general argumentation scaffolds (compared group) showed there wasn't statistically significant differences in the quality of the learning outcome of collaboration between the groups and in students satisfaction. But there was significant difference in the degree of individual acquisition depending on the offering of scaffolding for Critical Thinking. Therefore, as premised in this study, supporting meaningful mutual interaction between learners during collaborative argumentation using Critical Thinking Strategy has a positive influence on the individual acquisition of domain knowledge. The group provided with scaffolding for Critical Thinking gained higher effect in the degree of knowledge sharing and individual acquisition of domain knowledge compared to the group provided with general argumentation scaffolding.

• Educational Technology International
• /
• 제7권1호
• /
• pp.59-79
• /
• 2006

The purpose of this study is to measure the impact of motivation on academic achievement and satisfaction of adult learners in an e-Learning environment, and to come up with strategies to improve the effectiveness of e-Learning for adult learners. In order to find answer, devices were developed, tested for validity and reliability, and use for testing variables for 289 adult learners. To measure the impact of achievement motivation on learning in job training, a multiple regression analysis was performed. The analysis results show that achievement motivation has an impact on academic achievement with significance level .001, but does not have an impact on a learner's satisfaction. Further analyses on the subcategories of achievement motivation show that individual-oriented motivation affects achievement with significance level of .001, while social-oriented motivation does not. From this finding, some strategies to boost individual-oriented motivation are suggested to enhance effectiveness of job training in e-Learning environment. Further strategies to boost individual-oriented motivation should be developed by studying various aspects of e-Learning such as learning environments, learning culture, learning modes and methods, and evaluation.

• 인지과학
• /
• 제23권4호
• /
• pp.487-515
• /
• 2012

본 연구의 목적은 다양한 방식으로 개개인의 인지능력을 측정하고 문단 이해 능력을 살펴보는 것을 통해 문단이해에 영향을 미치는 인지정보처리 기제를 살펴보는 것이다. 이를 위하여 본 연구에서는 어휘판단 과제와 형태비교 과제를 사용하여 하위 인지능력을 측정하였고 숫자폭 과제, 작업폭 과제와 읽기폭 과제를 통하여 작업기억의 개인차를 측정하였다. 또한 논리적으로 유효한 추론과 유효하지 않은 추론의 처리 속도와 정확도를 살펴보는 것을 통해 고차 인지능력을 측정하였다. 문단이해 능력을 측정하기 위해서는 목표 문장 앞에 원인 문장이 있는 경우와 그렇지 않은 경우에 실험참여자들의 문장의 읽기 속도와 정확도를 측정하였다. 구조 모형을 통해 문단이해에 영향을 미치는 요인들을 살펴본 결과 하위 인지처리의 속도는 고차 인지처리의 속도와 상관이 있고 하위 인지처리의 정확도는 고차인지 처리의 정확도와 상관이 있었으나 고차 인지처리와 하위 인지처리에서 모두 속도와 정확도간의 상관은 나타나지 않았다. 또한 작업기억은 고차 인지처리 및 하위 인지처리의 정확도와는 상관이 있었으나 인지처리의 속도와는 상관이 없었다. 보다 중요하게 문단이해의 속도에는 하위 인지처리의 속도만이 영향을 미쳤지만 문단이해의 정확도에는 작업기억과 고차인지처리 기제가 영향을 미치는 것으로 나타났다. 문단이해의 속도는 문단이해의 정확도에 영향을 미치지 않았다.

• 한국산학기술학회논문지
• /
• 제15권6호
• /
• pp.3625-3634
• /
• 2014

본 연구는 치과기공사의 건강관련 삶의 질 관리에 필요한 자료를 제시함으로써 치과기공사의 건강 위험 예방 및 관리를 위한 기초자료를 제공하고자 실시되었다. 조사대상은 대전지역 30개 치과기공소와 해당 업체에 근무하는 치과기공사 141명으로 하였으며, 2011년 12월 20일부터 2012년 1월 31일까지 작업환경을 측정함과 동시에 구조화된 자기기입식 설문지를 이용하여 설문조사를 실시하였다. 수집된 자료의 분석결과 건강지수 총점은 개인수준 요인인 근무시간과 흡연상태에 따라 통계적으로 유의미한 차이를 보였으며, 신체적 건강지수는 개인수준 요인인 흡연상태와 운동습관에 따라 통계적으로 유의미한 차이를 보였다. 정신적 건강지수는 개인수준 요인인 근무시간과 흡연상태에 따라 통계적으로 유의미한 차이를 보였다. 집단수준의 예측변수에서는 유의미한 변수가 나타나지 않았다. 결론적으로 치과기공사의 건강관련 삶의 질 수준은 집단수준 요인보다 개인수준 요인에 더 큰 영향을 받는 것으로 나타났다.

• 대한간호학회지
• /
• 제42권7호
• /
• pp.928-935
• /
• 2012

Purpose: The current study was done to identify individual- and group-level factors associated with health care service utilization among Korean medical aid beneficiaries by applying multilevel modeling. Methods: Secondary data analysis was performed using data on health care service reimbursement and medical aid case management progress from 15,948 beneficiaries, and data from 229 regions were included in the analysis. Results: Results of multilevel analysis showed an estimated intraclass correlation coefficient (ICC) of 18.1%, indicating that the group level accounted for 18.1% of the total variance in health care service utilization, and that beneficiaries within the region are more likely to share common features with regard to health care service utilization. At the individual level, existence of disability and types of medical aid beneficiaries showed a significant association, while, at the group level, social deprivation index, and the number of beneficiaries and case managers within the region showed a significant association with health care service utilization. Conclusion: The significant influence of group level variables in health care service utilization found in this study indicate a need for group level approaches, such as policy change and/or promotion of community awareness.

• 영어어문교육
• /
• 제3호
• /
• pp.13-42
• /
• 1997

The purpose that the curriculum appropriate for the student's level pursues is to offer to a student the curriculum that can satisfy the student's interest, aptitude, and requirements. This curriculum has recently enforced all over the country, but the careful research and the plan for verification on its effect are required so that it may accomplish its purpose. This study, centered on the reading comprehension ability of Freshman English of the High School, aims to suggest a more desirable procedure for organizing and enforcing the curriculum appropriate for the students' level. In order to provide the best curriculum appropriate for the student's level. (1) the diagnosis of the individual student's level should be made first ; (2) the syllabus focused both on the grammar and on the communicative functions should be prepared ; (3) the teaching material on the basis of the syllabus should be selected considering the student's interest. and requirements. The new method of teaching-learning English should also be developed with the enforcement of the new curriculum discussed here. The curriculum appropriate for the student's level has many kinds of problems but these disadvantages should be overcome for providing the better educational system for the individual student.