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Kim Changnam,Ahmed Oli,Park C. Hyung Keun,Chung Seockhoon 대한신경정신의학회 2022 PSYCHIATRY INVESTIGATION Vol.19 No.6
Objective In this study, we aimed to develop a Korean version of the Coronavirus Reassurance-Seeking Behaviors Scale (CRBS) and to explore its reliability and validity among the general population in South Korea.Methods Using an online survey conducted during November 9–15, 2021, we collected the demographic data of 400 individuals and their responses to rating scales such as the CRBS, the Stress and Anxiety to Viral Epidemics-6 items (SAVE-6), the Generalized Anxiety Disorder-7 items (GAD-7), and the Patient Health Questionnaire-9 items (PHQ-9). We conducted factor analyses and utilized item response theory to confirm the validity and reliability of the Korean version of the CRBS.Results Factor analyses revealed that the single factor model of the Korean version of the CRBS showed a good fit with the CRBS (χ<sup>2</sup>=5.475, df=5, p value=0.361, χ<sup>2</sup>/df=1.095, CFI=0.999, TLI=0.998, RMSEA=0.015). Multigroup CFA results indicated that the CRBS measures reassurance-seeking behaviors consistently across variables of sex, depression, general anxiety, and viral anxiety. The CRBS also exhibited good convergent validity with the SAVE-6 (r=0.431, p<0.001), GAD-7 (r=0.574, p<0.001), and PHQ-9 (r=0.575, p<0.001).Conclusion The CRBS is a reliable and valid rating scale that measures reassurance-seeking behavior in relation to viral epidemics.
Mobile IPv6에서 Fast Handoff 기법을 이용한 AAA 인증 성능 향상 방안
김창남(Changnam Kim),문영성(Youngsong Mun),허의남(Eui-Nam Huh) 한국정보과학회 2004 정보과학회논문지 : 정보통신 Vol.31 No.6
본 논문에서는 이동노드의 글로벌 이동성을 제공하기 위한 방법으로 AAA(Authentication, Authorization and Account) 서비스 기반의 보안 인증 모델을 정의하고 AAA 인증 절차에서 발생하는 서비스 지연 시간을 최소화하기 위해 Mobile IP 작업 그룹에서 정의하고 있는 Fast Handoff를 적용하였다. 즉, 이동노드의 로밍이 발생하는 경우 Fast Handoff 절차가 진행되면서 동시에 AAA 인증 절차를 수행함으로써 이동노드 인증 시간을 줄이고 신속한 로밍 및 서비스 제공이 가능하도록 하였다. IPsec (Internet Protocol Security), RR(Return Routability), AAA를 기반으로 한 기존의 방식들은 이동노드의 Layer2 Handoff가 성공적으로 처리된 후에 발생하는 인증 절차를 정의하고 있는데 이 절차가 수행되는 동안은 이동 노드의 서비스가 지연되므로 실시간, 고품질의 서비스를 만족하기 위해서는 이를 줄일 수 있는 방안이 연구되어야 한다. 본 논문에서 제안한 방법은 이러한 목적을 만족하기 위한 것으로써 제안된 방식을 사용했을 때 Layer2 Handoff 전에 이동 노드가 FBACK(Fast Binding Acknowledge) 메시지를 받은 경우 최대 55%, 받지 못한 경우 최대 17%의 성능 향상을 보인다. In this paper, we define the secure authentication model to provide a mobile node with global roaming service and integrate the Fast Handoff scheme with our approach to minimize the service latency. By starting the AAA(Authentication, Authorization and Account) procedure with Fast Handoff simultaneously when a roaming occurs, authentication latency is reduced significantly and provision of fast and seamless service is possible. The previous works such as IPsec(Internet Protocol Security), RR (Return Routability) and AAA define the procedures performed after the completion of Layer2 Handoff which leads us to study a way of providing the real time and QoS guaranteed service during this period. The proposed scheme is for this goal and when appling it to roaming environment it shows the cost reduction up to 55% and 17% for the case of the MN receiving the FBACK and not respectively before L2 Handoff occurs.
김혜영(Hyeyoung Kim),김동선(Dongsun Kim),홍창남(Changnam Hong) 한국지방교육경영학회 2017 지방교육경영 Vol.20 No.1
본 연구의 목적은 부산광역시교육청 소속의 중학교 자유학기제 희망학교 운영 사례를 분석하여 자유학기제의 안정적인 정착을 위한 시사점을 제공하는 것이다. 본 연구에 참여한 학교는 총 6개이며, 주요 결과는 다음과 같다. 첫째, 대부분의 자유학기제 희망학교들은 교육청의 요청과 학교장 혹은 교감의 적극적인 의지가 반영되어 자유학기제를 시작하게 되었다. 둘째, 자유학기제 운영을 위해 교사들은 수업시수 변경과 같은 교육과정 재구성, 학생 활동 중심의 수업방식 및 평가방식의 변화를 이끌어 냈다. 끝으로, 학생의 수업 태도 변화가 자유학기제의 가장 큰 성과로 나타났으며, 교사 업무시간의 부족, 교사 간 갈등 등은 자유학기제 운영의 어려움으로 확인되었다. The purpose of this study is to provide a suggestion for the stable settlement of 'Free Semester' by analyzing the cases of 'Free semester' hope schools in Busan Metropolitan City office of Education. The total number of schools participating in this study is 6, and the main results are as follows. First, most hope schools have started 'Free Semester' because of requesting from the office of Education and the active involvement of the principal or vice principal. Second, for the free semester system, the teachers lead the change of curriculum such as change of the number of classes, the change of teaching method and evaluation method centered on student activities. Finally, the change of attitude of the students showed the greatest achievement of the free semester system, and lack of teacher working time, conflict between teachers were found to be difficult to operate the free school system.
장규환,Eun-Joo Kim,Seong-Cheol Cho,Sung-Up Moon,Byeong Soo Kim,Jinhee Kim,Kyoung Ju Jeong,송경옥,Seong Hwan Mun,Won-Myoung Kang,Jonghoo Lee,Changnam Park,Hyoung-Seok Yang,이창희 대한백신학회 2022 Clinical and Experimental Vaccine Research Vol.11 No.3
Purpose: Classical swine fever (CSF) reemerged on CSF-free Jeju Island where vaccination is not practiced by the unintentional injection of a live attenuated vaccine (modified live attenuated vaccines–low-virulence Miyagi [MLV-LOM]) in 2014. Since the Jeju provincial authority is considering adopting a voluntary immunization policy using a CSF-E2 subunit vaccine to combat LOM-derived CSF endemic, this study aimed to evaluate in Jeju herds. Materials and Methods: Two vaccination trials using the Bayovac CSF-E2 vaccine licensed for use in South Korea assessed the safety and humoral immunity of the CSF-E2 vaccine in breeding (trial 1) and nursery animals (trial 2) under farm application conditions. Results: Neither local nor systemic (including reproductive) adverse effects were objectively observed in pregnant sows and young piglets following a respective vaccination regime at pregnancy or weaning, respectively. Trial 1 showed that sows immunized with the CSF-E2 vaccine possessed high and consistent E2-specific and neutralizing antibody levels. The CSF-E2 vaccine-immunized pregnant sows subsequently conferred appropriate and steady passive immunity to their offspring. In trial 2, a double immunization scheme of the CSF-E2 vaccine in piglets at 40 and 60 days of age could elicit a consistent and long-lasting adequate antibody response. Additionally, the two trials detected no Erns-specific antibody responses, indicating that CSF-E2 vaccine can differentiate infected from vaccinated animals (DIVA). Conclusion: Our trial data collectively provide invaluable information on applying the CSF-E2 subunit vaccine to circumvent the possible drawbacks associated with the MLV-LOM concerning the safety, efficacy, and DIVA, in the LOM-endemic field farms and contribute to advanced CSF eradication on Jeju Island.
Jeong Dongyeon,Cho Inn-Kyu,Kim Kyumin,Lee Joohee,Choi Jung Mun,Kim Jiyeon,Kim Changnam,Yoo Soyoung,Chung Seockhoon 대한신경정신의학회 2022 PSYCHIATRY INVESTIGATION Vol.19 No.7
Objective We aimed to explore the influence of public workers’ distress or viral anxiety on their level of depression and work engagement during the coronavirus disease (COVID-19) pandemic. Additionally, we ascertain the mediation effect of resilience and public service motivation on this association.Methods A total of 300 public workers participated in this online survey. Their demographic characteristics and responses to survey items were collected using the Stress and Anxiety to Viral Epidemics–6 items Scale, the Patient Health Questionnaire–9 items Scale, the Public Service Motivation (PSM) Scale, the Nine-item Utrecht Work Engagement Scale, the Korean Occupational Stress Scale–Short Form, and the Brief Resilience Scale.Results Work engagement of public workers was expected by PSM (β=0.28, p<0.001), resilience (β=0.30, p<0.001), and work-related stress (β=-0.40, p<0.001) (F=57.4, p<0.001). Depression was expected by fewer years of employment (β=-0.12, p=0.02), viral anxiety (β= 0.21, p<0.001), and low resilience (β=-0.42, p<0.001) (F=22.1, p<0.001). Resilience and PSM partially mediated the effects of work-related stress on work engagement. Depression was influenced by COVID-19–induced viral anxiety, and their resilience—but not PSM—mediated the association.Conclusion Public workers’ resilience and PSM partially mediated the effects of work-related stress on work engagement. The influence of viral anxiety on public workers’ depression was mediated by their resilience but not PSM.
Ahn, Meejung,Moon, Jihwan,Park, Changnam,Bang, Hyojin,Kim, Gi Ok,Kim, Sun-Ju,Kim, Ki-heung,Shin, Taekyun Kyung Hee Oriental Medicine Research Center, Kyung 2016 Oriental Pharmacy and Experimental Medicine Vol.16 No.1
We evaluated whether crude juice extract of chungpihongsim radish (Raphanus sativus L. cv. Chungpihongsim) (CH radish), with its characteristic red flesh and white skin, ameliorated ethanol-induced gastric injury in rats. Animals were divided into five groups: normal control, a group given CH radish extract (1000 mg/kg) only, two groups orally administered CH radish extract (500 and 1000 mg/kg, respectively, daily for 2 weeks) with ethanol treatment (5 mL/kg) 24 h after final administration of CH radish extract, and a group treated with ethanol alone. Tissues of stomach were collected after sacrifice, and the gastric mucosal injury index using hemorrhagic lesions were measured. Lipid peroxidation was evaluated based on malondialdehyde concentration. The radical-scavenging enzymes superoxide dismutase (SOD) and catalase (CAT) were also measured. Rats treated with CH radish extract (500 or 1000 mg/kg) for 2 weeks experienced no change in body weight. Pretreatment with the extract at both doses significantly ameliorated ethanol-induced hemorrhagic lesions in the gastric mucosa (p< 0.05), decreased malondialdehyde concentration (p< 0.05), and increased the levels of SOD (p< 0.05) and CAT (p< 0.05), compared to ethanol-alone treatment. These findings suggest that pretreatment with CH radish extract reduces ethanol-induced damage in the gastric mucosa, mediated partly by a decrease in lipid peroxidation and an increase in the cytoprotective radical-scavenging enzymes SOD and CAT.