• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5124-5129
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• 2012

For achieving team performance, organizations should consider member's competency and their collective competency simultaneously. The principal aim of this research is to examine relationships among collective competency, group cohesiveness, team performance. 438 employees composing 52 teams participated in this empirical study. Results show that the mean of member competency was not associated with team performance. Results also show that there was no effect of group cohesiveness on team performance. However, consistent expectation, the interactive effect of collective competency and group cohesiveness on team performance was significant. Implications for future research are also discussed.

• Journal of the Korean Society of School Health
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• v.27 no.1
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• pp.39-49
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• 2014

Purpose: The purpose of this study was to investigate the effect of hand washing education programs on knowledge, attitude and performance of hand washing in Undergraduates. Methods: The study used a nonequivalent control group quasi-experimental design. A total of 118 students in K university in Seoul, Korea, participated in this study. 67 students were included in the experimental group and 51 students were in the control group. The experimental group was given a lecture, Educational Hand Washing Program, developed by researchers. Using a structural questionnaire, the students' perception on hand washing was measured before and after the intervention, in terms of knowledge, attitude, and performance at home and school. Results: The experimental group showed significantly higher scores in knowledge (p=.033), attitude (p<.001), and performance at home (p=.001). However, the performance at school didn't show a significant difference between the two groups (p=.063). Conclusion: The results indicate that education is effective in enhancing knowledge, attitude, and performance of hand washing.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.1
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• pp.149-165
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• 2013

Current group key agreement protocols, which are often tree-based, have unnecessary delays that are caused when members with low-performance computer systems join a group key computation process. These delays are caused by the computations necessary to balance a key tree after membership changes. An alternate approach to group key generation that reduces delays is the dynamic prioritizing mechanism of queue-based group key generation. We propose an efficient group key agreement protocol and present the results of performance evaluation tests of this protocol. The queue-based approach that we propose is scalable and requires less computational overhead than conventional tree-based protocols.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.7
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• pp.1737-1753
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• 2013

Current group key agreement protocols, which are often tree-based, have unnecessary delays that are caused when members with low-performance computer systems join a group key computation process. These delays are caused by the computations necessary to balance a key tree after membership changes. An alternate approach to group key generation that reduces delays is the dynamic prioritizing mechanism of queue-based group key generation. We propose an efficient group key agreement protocol and present the results of performance evaluation tests of this protocol. The queue-based approach that we propose is scalable and requires less computational overhead than conventional tree-based protocols.

• Journal of the Korean Society for Library and Information Science
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• v.19
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• pp.189-241
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• 1990

This study identified cognitive styles of online searchers in terms of Field Dependence (FD) and Field Independence (FI) dimension and determined whether searching performance was affected by FD / FI cognitive differences between online searchers and the extent to which searching performance was affected by the FD / FI dimension of cognitive style. This study used a quasi experimental design with 41 student subjects using the Lockheed DIALOG system and ERIC ONT AP database. Cognitive styles of student subjects were measured by using GEFT (Group Embedded Figure Test) and the subjects were divided into two cognitive groups- FD and FI based on the GEFT scores. Each subject was assigned two predetermined searches which had different search goals-a 'high precision search' and a 'high recall search.' Search performance of the two cognitive groups on the two problems was compared in order to see how these two groups responded to achieving different search goals in terms of search strategy, search inputs, and resulting search outputs. The major findings of this study were: 1. The pattern of approaching a search problem regardless of whether it was a high precision search or a high recall search was not significantly different between the two cognitive groups. 2. The FI group tended to use significantly more terms for the high recall search than the FD group but slightly less time than the FD group. However, significant differences in connect time between the two groups were not revealed. 3. For both search problems the FI group achieved a significantly higher success rate than the FD group. The FI group were significantly more successful searchers than the FD group. As for unit / cost, although the FI group were more cost effective than those of the FD group for both searches, these differences were too small to be statistically significant. 4. Mean differences of the search performance variables between the FD / FI groups were consistent across the two types of search questions. The FI group seemed to be equally effective for both types of search questions. In conclusion, the differences found in number of terms used and success rate between the two cognitive groups apparently resulted from different cognitive styles.

• Journal of the Korea Convergence Society
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• v.11 no.6
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• pp.227-235
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• 2020

This study expanded the superiority of random leader selection procedure on group decision-making task to actual group performance task, and examined the interaction effects of leader selection procedure(LSP) and collective efficacy(CE) on group performance. 2(LSP: formal/random)×2(CE: low/high) between subject design was used. The result revealed the significant main effect of LSP, which showed that groups with random leader performed better than those with formally selected leader. Further, significant interaction effect of LSP and CE revealed that when group's CE was high, group with random leader performed better than group with formally selected leader, and the difference between two groups was not significant when group's CE was low. These results suggested that LSP should not impair shared social identity of the group in order to maintain the positive effect of CE on group performance. The necessity for expanding these results to work team was discussed.

• Asian Oncology Nursing
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• v.12 no.2
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• pp.132-138
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• 2012

Purpose: The purpose of this study was to identify the performance status and quality of life (QOL) of patients after hematopoietic stem cell transplantation (HSCT) according to period of survival. Methods: Participants consists of 83 HSCT patients who were being treated regularly at out-patient clinic in two general hospitals in D city. Data were collected using questionnaires that were modified by Functional Assessment of Cancer Therapy-Bone Marrow Transplabtation (FACT-BMT) scale and Eastern Cooperative Oncology Group (ECOG). Results: The unrelated HSCT group's survival period was significantly worse than related HSCT group and autologous HSCT group. Performance status of the group with more than 3 years survival was significantly higher than that of the group with less than a year survival. The mean score of total QOL of HSCT patients was 2.69 out of 4. Total QOL was not significantly different among period of survival less than 1 year, 1-3 years, and more than 3 years. But BMT QOL was shown that the group with more than 3 years survival was higher than the groups with less than a year survival. Conclusion: Performance status and BMT QOL of the group with less than 1 year survival was significantly lowered than the groups with more than 3 years survival.

• Korean Journal of Agricultural Science
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• v.47 no.4
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• pp.707-715
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• 2020

An experiment was designed to assess ractopamine supplementation on growth, meat quality and carcass, and fecal scores of pigs. The 96 crossbred pigs ([Yorkshire× Landrace] × Duroc) had an average body weight of 72.8 ± 2.5 kg. Randomized allocation was followed in the allotment of the pigs according to their body weight into 1 of 2 dietary treatments: 1) CON, basal diet and 2) RAC (ractopamine hydrochloride), CON + 1% ractopamine with 12 replication pens per treatment including equal numbers of barrows (2) and gilts (2) per pen. At the end of the experiment, the lean meat percentage was higher (p < 0.05) for the RAC group compared to the CON group. Dietary ractopamine supplementation did not influence (p > 0.05) the growth performance and fecal score throughout the experimental period. In regard to sensory evaluation, higher (p < 0.05) scores for color and firmness were observed in the RAC group than in the CON group. Drip loss (p < 0.05) was higher in the ractopamine fed diet group compared to the control diet group at day 1. Additionally, longissimus muscle was improved (p < 0.05) in the ractopamine treated diet group than in the control diet group. In conclusion, in the early stage, ractopamine supplementation may not influence the growth performance, but it improves the leanness in the meat of finishing pigs.

• The Journal of Korean Academic Society of Nursing Education
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• v.26 no.1
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• pp.16-24
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• 2020

Purpose: This study examined the effects of guided imagery on stress, state anxiety, test anxiety and core basic nursing skill performance score of undergraduate nursing student. Methods: An equivalent control group pretest-posttest design was utilized. A total of 45 senior nursing students were randomly assigned to either an intervention group to receive guided imagery, or a control group (experimental group=23 students, control group=22 students). The guided imagery was provided via audio files to the intervention group for eight minutes, once a day for five days. The pretest was given before the intervention to measure variables for both groups, and the posttest was performed immediately afterward and three days after the intervention. Results: Significant differences were found between the two groups in stress ((F=4.94, p=.012), state anxiety (F=5.99, p=.005), and basic core nursing skill performance scores (Z=-2.45, p=.015). Conclusion: Guided imagery for nursing students has been identified as effective for stress, state anxiety, and basic core nursing skill performance scores. Guided imagery can be used as an effective intervention before performance tests. These study results can provide useful data for nursing education.

• Korean Journal of Adult Nursing
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• v.25 no.2
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• pp.170-182
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• 2013

Purpose: This study investigated the effectiveness of simulation training with a hybrid model of student nurses' performance ability and reported self confidence. Methods: A nonequivalent control group with pre-posttest was designed. Data collection was done during the first semester in 2012 at a college of nursing in Seoul. Nursing performance ability and reported self confidence related to taking care of patients with urinary problems were evaluated. The treatment group (n=96) received simulation training of a catheterization procedure with a hybrid model involving standardized patients and a mannequin. Nursing students in the comparison group (n=84) did not receive the simulation training but would receive it prior to their next clinical practicum's. Results: The treatment group showed a significantly higher performance ability and reported self confidence than that of the comparison group. The perceived helpfulness and contentment of the simulation training in experimental group was high. Conclusion: The findings of this study demonstrated that simulation with a hybrid model was effective in teaching skills prior to the clinical experience which suggests that skill development is not dependent on the actual clinical situation. Nurse educators should consider simulation training as a tool beyond that of clinical practicum.