• Journal of Chest Surgery
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• v.34 no.3
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• pp.224-230
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• 2001

배경: 지속적인 온혈 심성지액을 이용한 심금 보호술이 소개된 이수, 이를 토대로 많은 임상결과가 발표되고 있다. 그러나 지속적 심정지액 주입에 따른 적정한 수술시야 확보와 역행성 관류법에 따른 우심실 보호에 대한 문제들이 제기 되고 있다. 이에 Antonio 등은 포타슘만을 이용한 간헐적 온혈액 심정지술을 이용하여 만족할 만한 임상결과를 보고 하였다. 본 임상연구는 포타슘만을 이용한 간헐적 온혈액 심정지술을 이용하여, 개심술을 시행 받은 70례의 환잔의 임상결과를 분석하여 그 유용성을 알아보고자 하였다. 대상 및 방법: 1998년 5월부터 1999년 1월까지 포타슘만을 이용한 간헐적 온혈액 심정지술을 이용하여 관상동맥 우회술 및 판막수술을 시행한 70명의 환자와 같은 기간 간헐적 냉혈액 심성지술을 이용하여 동일 술자에 의해 수술을 시행한 70명의 임상결과를 비교 분석하였다. 결과: 총 심폐기 사동 시간(98.7$\pm$6.0분, 114.3$\pm$7.5분, p=0.018),수술중 심정지를 위해 필요한 심정지액의 양(1463.0$\pm$68.0cc, 3584.0$\pm$179.0cc, p<0.001), 의식이 회복될 때까지의 시간(3.5$\pm$0.4시간, 4.9$\pm$0.8시간, p=0.044), 기관 삽관의 제거까지의 시간(10.8$\pm$0.8시간, 13.2$\pm$0.6시간, p=0.017), 부정액으로 리도케인(Lidocaine)의 도움이 필요한 경우(75.2$\pm$6.8mg, 114.5$\pm$7.2mg, p=0.006)등에 있어서는 포타슘만을 이용한 간헐적 온혈액 심정지술이 유의성의 있었고, 술수 심근효소의 상승, 사망률과 이환율에 있어서는 두군간의 유의성은 없었다. 결론: 관상동맥 우회술 및 판막수술에 있어 포타슘만을 이용한 간헐적 온혈액 심정지술은 적어도 간헐적 냉혈액 심정지술과 같은 정도의 심근 보호를 할 수 있었으며, 기존의 warm heart surgery의 장점인 심폐기 가동시간이 짧고, 의식회복이 빠른 점과 함께 용적과부학(volume loading)를 줄일 수 있는 장점이 있어 유용한 심근 보호술의 하나로 사료된다.

• Child Health Nursing Research
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• v.17 no.1
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• pp.39-47
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• 2011

Purpose: This study was done to determine whether a parenting education program using responsive teaching strategies is effective for parenting stress, maternal interactional behavior and behavioral problems in children at risk for Attention Deficit Hyperactivity Disorder (ADHD). Methods: Participants in this study were 17 elementary school children and their parents. The ADHD risk group was determined by scores on the Korean-ADHD Rating Scale. The parenting education program was developed based on Dr. Mahoney's responsive teaching curriculum. Mothers participated in the program once a week for 8 sessions. Treatment outcome was evaluated using the Korean version of the Child Behavior CheckList (K-CBCL), parenting stress, maternal interactional behavior, and child pivotal developmental behavior. Data were analyzed using Wilcoxon signed rank test, Mann-Whitney test, and regression analysis. Results: After the parenting education program, no significant difference in parenting stress (Z=-1.00, p=.320) was found, but there was a significant decrease in the child's internal behavior problems (Z=-2.05, p=.040), and also a significant improvement in maternal interactional behavior and a significant difference in child pivotal developmental behavior (Z=-2.67, p=.008). Conclusion: The results indicate that parenting education programs based on responsive teaching strategies are effective and that application of a program is recommended to prevent behavioral problems and improve maternal child interaction for children at risk for ADHD.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.5
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• pp.211-216
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• 2011

Networked virtual environments (NVEs) are distributed systems where geographically dispersed users interact with each other in virtual worlds by exchanging network messages. Massively Multiplayer Online Game (MMOG) is one of diverse applications where more than hundreds of users enjoy experiencing virtual worlds. A limited area called area of interest (AOI) in MMOG is reduced the load caused by message exchange between users. Voronoi-based Overlay Network (VON) is proposed to reduce the bandwidth consumption in P2P environments and Vorocast also is made using message forwarding in VON. We propose a dynamic AOI management method that solves problems such as a consistency and latency due to forwarding position updates to neighbor nodes from the message originator in forwarding scheme. Our scheme provides the consistency and reduces latency by combining direct connection scheme and Vorocast scheme compared to existing schemes. The communication between a user and users existing in center circle within AOI of the user is directly connected and the communication between the user and users existing outside the center area within AOI is using Vorocast scheme. The proposed model is evaluated through simulations.

• Horticultural Science & Technology
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• v.31 no.6
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• pp.821-827
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• 2013

The purpose of this study was to investigate the effects of three kinds of horticultural activities (HAs) on attention concentration of elementary students. We selected 20 students using a Wee Class counseling office at J elementary school in Yeongcheon, and divided them into experimental and control groups composed of ten students each. The experimental group participated in three HAs including flower arrangement, planting, and pressed flower. Each HA was composed of three sessions and a session proceeded for a week. For the examinations of attention concentration, two groups responded the questionnaires before a week of the first session and at the end of the 9th session, only the experimental group participated in the measurement using grid by Harris before a week of the first session and at the end of each HA every week. The results of questionnaire survey showed that the scores of problem in emotion and problem in controlling, and the total score decreased 9.2, 7.8, and 19.0 points, respectively (P < 0.05), indicating that the attention concentration of the experimental group improved compared with the control. In the measurements using grid by Harris, the flower arrangement, planting, and pressed flower activities increased the scores by 2.22, 2.49, and 2.41 points compared with the pre-HA of 6.00, respectively (P < 0.05), that means the improvements of attention concentration. At the post-HAs, the flower arrangement, planting, and pressed flower activities increased the scores by 1.12, 1.39 and 1.31 points compared with the control group of 7.10, respectively (P < 0.05). In conclusion, the indoor HAs improved the attention and concentration of elementary students irrespective of kind of activities.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.588-591
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• 2002

P2P(Peer-to-Peer) can compose free network and take away center server function or problem about authentication is risen between each User because is opening network that can participate between each User weakening. We desire to authenticate request about service to user who is admited between each user to limit connection. Wish to admit Kerberos authentication mechanism to mechanism that can do information sharing safety in P2P environment to solve this in this treatise and design authentication mechanism.

• Applied Chemistry for Engineering
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• v.30 no.6
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• pp.667-672
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• 2019

As a non-renewable energy source, fossil fuel causes environment problems, numerous efforts have been made for a global decarbonization, for example, the realization of Power 2 Gas (P2G) system as a definitive research goal. In particular, ammonia is regarded as an emerging source since it can be used as a hydrogen carrier and production alongside for fuel cell applications. In this mini-review, we summarized the properties of ammonia and further highlighted the worldwide research trend for its superb potential in hydrogen energy supply industries.

• Korean Journal of Occupational Health Nursing
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• v.17 no.1
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• pp.45-54
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• 2008

Purpose: This study was conducted to compare and estimate sleep patterns and health status of the shift and non-shift factory workers. Methods: The subjects of this study were 290 male workers in 13 companies, which manufacture automobile parts in Daegu, Korea. Survey data were collected from March 5th, 2007 to April 5th, 2007. PSQI was scored to check the quality of sleep, ESS for excessive daytime sleep disorder, ISI for insomnia, and SF-36 for health status. The data were analyzed by $X^2$ and t-test using SPSS 12.0 for windows. Results: There was a difference in quality of sleep patterns between shift and non-shift workers (p=.033). A difference in the pattern of excessive daytime sleep (P=.005) and in the degree of insomnia (p=.030) were observed between the two groups. However, there were no significant difference in health status between the two groups. Conclusion: Based on these results, shift workers are in need of careful and continuous monitoring regarding sleep disorders and we need to develop health promotion programs including sleep hygiene for shift workers.

• Journal of The Korean Society of Inherited Metabolic disease
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• v.14 no.1
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• pp.60-65
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• 2014

Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive disease caused by a defect in cholesterol biosynthesis. This mutation encodes 7-dehydrocholesterol reductase (DHCR7), which is located on chromosome 11q13. It is characterized by typical facial appearances, microcephaly, small up-turned nose, cleft palate, syndactyly, and is correlated with cardiac, gastrointestinal and genital malformations. There may also be mental retardation, behavioral problems and growth retardation. It causes a broad spectrum of effects, ranging from a mild disorder of learning and behavior to a lethal malformation. There are four reports of Smith-Lemli-Opitz syndrome in Korean children. Here, we describe a two months old female with microcephaly, toe syndactyly and a cleft soft palate who was diagnosed as SLOS with c. 1054 C>T (p.R352W) and c.907G>A (p. G303R) mutations.

• Korean Journal of Psychosomatic Medicine
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• v.15 no.1
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• pp.51-55
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• 2007

Backgrounds: Obesity and depression are serious health problem and also constitute cardiovascular disease risk factors. Some studies found an association between obesity and higher rates of depression in women but not in men. The current study examined the association between depressive symptoms and obesity, especially central obesity in Korean women. Methods : The participants were 4,609 Korean women aged 20-85 years. Each individual was assessed for the presence of obesity and central obesity using the criteria suggested by WPRO(World Health Organization Regional Office for the Western Pacific). Depressive symptomatology was measured by Beck Depression Inventory(BDI). Results : In obese women, rate of depressed women is significantly higher compared normal group(27.6% VS. 23.2%, p<0.01). The rates of depressed women is higher in women who had central obesity(26.9% VS. 22.7%, p<0.01). Depressed women had higher rates of central obesity(93.2% VS.86.9%, p<0.01). Conclusion Our findings show obesity especially central obesity is associated with depressed women and suggests that further investigation for interaction between depression and obesity is needed.

• Journal of Engineering Education Research
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• v.12 no.4
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• pp.30-37
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• 2009

The purpose of this study was to examine the difference of problem-solving ability according to student's level of self-efficacy. Participants were 72 junior students who took the course 'Environmental Instrumental Analysis'. Before the PBL activities, students were given the self-efficacy tests to all students. Among them, 44 students(30% of each high and low ranking) were selected and encouraged to complete pre-problem solving tests. The PBL was conducted for 12 weeks using blended learning strategies. After the PBL, 44students completed post-problem solving tests. Results showed that there were differences of problem-solving ability according to student's level of self-efficacy. From the results, instructional strategies for promoting students' self-efficacy should be employed for enhancing problem-solving ability in PBL activities.