• Monthly Korean Chicken
• /
• v.16 no.5
• /
• pp.88-93
• /
• 2010

지난 3월호에서는 '미국 타이슨의 통합경영'에 대해 알아보았다. 이번 호에서는 태국의 대표 통합경영체인 CP 그룹에 대해 살펴보고자 한다.

• Information Display
• /
• v.23 no.3
• /
• pp.36-42
• /
• 2022

• Childhood Kidney Diseases
• /
• v.18 no.2
• /
• pp.98-105
• /
• 2014

Purpose: Nafamostat mesilate (NM), a synthetic serine protease inhibitor, has been investigated as an anticoagulant for adult patients with a high risk of bleeding, who need chronic renal replacement therapy (CRRT). However, little is known about the use of NM as an anticoagulant in pediatric CRRT. The aim of this study was to evaluate the ideal dosage, efficacy, and safety of NM in pediatric CRRT. Methods: We conducted a retrospective study of 40 pediatric patients who had undergone at least 24 h of venovenous CRRTs between January 2011 and October 2013. We divided the patients according to risk of bleeding. Those at high risk received no anticoagulation (group 1) or NM as an anticoagulant (group 2), while those at low risk received heparin (group 3). Results: Forty patients (25 male and 15 female; mean age, $8.2{\pm}6.6$ years) were enrolled. The mean duration of CRRT was 13.0 days, and the survival rate was 57.5%. The mean hemofilter lifespan was 39.3 h in group 1 and 11.3 h in group 3. In group 2, hemofilter lifespan was extended from 7.5 h to 27.4 h after the use of NM (P =0.001). The mean hemofilter lifespan with NM was greater than with heparin (P =0.018). No patient experienced a major bleeding event during treatment with NM. Conclusion: NM may be a good alternative anticoagulant in pediatric patients with a high risk of bleeding requiring CRRT, and is not associated with bleeding complications.

• Korean Journal of Environment and Ecology
• /
• v.20 no.2
• /
• pp.159-169
• /
• 2006

Interpretive sign is a communication medium that is often used in self-guided interpretation. Understanding interpretive signs and their users is important to maximize the effectiveness of interpretation. This study evaluated design attributes of interpretive signs by visitor's personal characteristics and visiting patterns using Importance-Performance Analysis(IPA). Data were collected from August to September of 2003 at the self-guided trail in Naejangsan National Park, Korea. Visitors using the trail participated in a questionnaire survey, and a total of 276 subiects was used for data analysis. The IPA results showed that female(23.3%) than male(13.3%), low age group(43.3%) than middle(0.0%) and high age group(0.0%), higher education group(36.7%) than lower education group(0.0%), medium size group(33.3%) than large(10.0%) or small group(16.7%), 'with child' group(66.7%) than 'without child' group(20.0%) rated higher importance and lower performance on more design attributes of the interpretive signs. These groups also showed higher rate of 'Concentrate Here(CH)' attributes that require urgent improvement. The 'with child' group showed the especially high rate of 'CH' attributes. The results suggest that interpretive signs need to be designed considering diverse user groups. It is also necessary to develop some standardized items of the sign design attributes for more efficient and reliable implementation of IPA and other evaluative works.

• The Bulletin of The Korean Astronomical Society
• /
• v.35 no.2
• /
• pp.47.2-47.2
• /
• 2010

태양플레어는 태양 대기에서 발생하는 격렬한 폭발현상으로 이를 예측하고 대비하기가 쉽지 않다. 본 연구에서는 플레어의 발생 확률이 태양 흑점 분류와 흑점 면적 변화량에 어떻게 의존하는 가를 조사하였다. 이를 위하여 약 9년 기간(2001년 7월 ~ 2010년 6월) NOAA에서 제공하는 AR(Active Region) 정보에 근거한 McIntosh 흑점 분류법을 사용하였다. 플레어는 C 등급 이상(C,M,X)인 것만을 고려하였다. 본 연구에서는 60개의 McIntosh 흑점군 그룹 중 가장 플레어를 많이 발생시키는 6개의 흑점군 그룹에 대해 태양 흑점 면적의 변화량을 각각 3그룹으로 나누어(감소, 무변화, 증가) 비교해보았다. 그 결과 거의 모든 그룹에서 태양 흑점의 넓이가 증가, 감소, 무변화 순으로 플레어의 발생 확률이 높다는 것을 확인하였다. 예로, 흑점군 그룹 중 Fkc그룹의 경우 위의 순서대로 65%, 50%, 44%로 M등급의 플레어가 발생했다. 흑점의 면적 변화가 자기플럭스의 변화를 나타내는 좋은 인자임을 고려할 때, 본 결과는 새로운 자기플럭스가 광구로 상승하는 경우에 플레어의 발생 확률이 더 높음을 보여준다. 본 연구 결과를 토대로 태양 흑점 분류와 면적의 변화량에 따른 플레어 발생 확률 연구의 발전방향과 활용 방안에 대해 논의하고자 한다.

• Journal of the Korea Society of Computer and Information
• /
• v.9 no.3
• /
• pp.177-182
• /
• 2004

The existing group key management architectures applied to a small scale routing protocols may have many overheads with key distribution. Therefore this paper proposes a group key management protocol in PIM-SM multicast group communication. This method divide multicast groups with RP, and subgroup key managers are established in each RP and can be transmitted groups keys. And this does not have needs of the data translation and the new key distribution for path change. This does not have needs of the data translation and the new key distribution for path change, so the data transmission time can be reduced.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.4
• /
• pp.197-202
• /
• 2018

This study was conducted to evaluate the distortion and data accuracy that may occur depending on the methods employed by the oral scanner (intra-oral scanner). Deseutap 3D models employing a plaster model used clinically as a scanner to create a standard scan data using the same model, separated by oral scanners in three different ways (AS Group, ZS group, OS group) How to scan each 5 times made the scan data for each group, it shows the 0.121 mm, 0.172 mm AS group, OS group 0.423 mm accuracy in ZS group. The ZS group showed the highest accuracy, with maximum error values of 0.113 mm, 0.169 mm and 0.246 being observed for the ZS, AS and OS group, respectively. The three scanning methods showed a clear differences in accuracy and reproducibility and also appeared to be meaningful in clinical practice.

• The KIPS Transactions:PartC
• /
• v.13C no.3 s.106
• /
• pp.339-344
• /
• 2006

Secure delivery of multicast data can be achieved with the use of a group key for data encryption in mobile ad hoc network (MANET) applications based on the group communication. However, for the support of dynamic group membership, the group key has to be updated for each member joining/leaving and, consequently, a mechanism distributing an updated group key to members is required. The two major categories of the group key distribution mechanisms proposed for wired networks are the naive and the tree-based approaches. The naive approach is based on unicast, so it is not appropriate for large group communication environment. On the other hand, the tree-based approach is scalable in terms of the group size, but requires the reliable multicast mechanism for the group key distribution. In the sense that the reliable multicast mechanism requires a large amount of computing resources from mobile nodes, the tree-based approach is not desirable for the small-sized MANET environment. Therefore, in this paper, we propose a new key distribution protocol, called the proxy-based key management protocol (PROMPT), which is based on the naive approach in the small-sized MANET environment. PROMPT reduces the message overhead of the naive through the first-hop grouping from a source node and the last-hop grouping from proxy nodes using the characteristics of a wireless channel.

• The Journal of the Korea Contents Association
• /
• v.13 no.3
• /
• pp.229-239
• /
• 2013

The purpose of this study was to examine the influential factors for the quality of life of 151 dental hygienists. Average score were job stress $2.84{\pm}0.60$, social support $3.97{\pm}0.52$ and quality of life $3.18{\pm}0.35$ In terms of the quality of life, there were significant gaps according to age, marital status, the type of workplace, education and economic status. In social support significant difference were found according to age, the type of workplace and work system. In job stress, economic status made significant differences to that. Among the sub-factors of the quality of life, the dental hygienists who worked in public dental clinics led a life of higher quality than those who worked in hospitals in terms of physical and psychological health. In terms of social relationships, the dental hygienists who received graduate-school education led a life of better quality than the college graduates. In terms of environments, the 30-34 age group led a life of better quality than the 25-29 age group, and those who worked in public dental clinics led a life of better quality than the others. Those who received graduate-school education led a life of better quality than the junior-college graduates and the college graduates, and the group whose annual income was between 30 and 39 million won led a life of higher quality than the others. In terms of the overall quality of life, the group that worked for five days a week was ahead of the other that worked for five days a week. As a result of analyzing what factors affected the quality of life, emotional support, material support were identified as the variables to have a significant impact on that.

• Journal of KIISE:Computer Systems and Theory
• /
• v.37 no.6
• /
• pp.348-353
• /
• 2010

A threshold decryption scheme is a multi-party public key cryptosystem that allows any sufficiently large subset of participants to decrypt a ciphertext, but disallows the decryption otherwise. When performing a threshold decryption, a third party is often involved to guarantee fairness among the participants. To maintain the security of the protocol as high as possible, it is desirable to lower the level of trust and the amount of information given to the third party. In this paper, we present a threshold decryption scheme which allows the anonymity of the participants as well as the fairness by employing a semi-trusted third party (STTP) which follows the protocol properly with the exception that it keeps a record of all its intermediate computations. Our solution preserves the security and fairness of the previous scheme and reveals no information about the identities of the participants and the plaintext even though an attacker is allowed to access the storage of the STTP.