• Korean Journal of Mathematics
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• 제27권2호
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• pp.535-545
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• 2019

The main idea of this paper is to introduce the notion of $cat^1$-monoids and to prove that the category of crossed semimodules ${\mathcal{C}}=(A,B,{\partial})$ where A is a group is equivalent to the category of $cat^1$-monoids. This is a generalization of the well known equivalence between category of $cat^1$-groups and that of crossed modules over groups.

• Molecules and Cells
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• 제20권2호
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• pp.247-255
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• 2005

Three different catalase cDNA clones (CaCat1, CaCat2, and CaCat3) were isolated from hot pepper (Capsicum annuum L.), and their expression patterns were analyzed at the levels of mRNA and enzyme activity. Northern hybridization showed that the three catalase genes were differentially expressed in various organs, and that expression of CaCat1 and CaCat2 was regulated differently by the circadian rhythm. In situ hybridization revealed different spatial distributions of CaCat1 and CaCat2 transcripts in leaf and stem. In response to wounding and paraquat treatment, CaCat1 mRNA increased at 4-12 h in both paraquat-treated and systemic leaves. In contrast, wounding had no significant effect on expression of the catalase genes. The increase of catalase activity in the paraquat-treated and systemic leaves paralleled that of CaCat1 mRNA, but did not match that of CaCat1 mRNA in paraquat-treated stems. Our results suggest that CaCat1 may play a role in responses to environmental stresses.

• Journal of Microbiology
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• 제39권3호
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• pp.168-176
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• 2001

Five different types of catalases from photosynthetic bacterium Rhodospirillum rubrum S1 grown aerobically in the dark were found in this study, and designated Catl (350 kDa), Cat2 (323 kDa), Cat3 (266 kDa), Cat4 (246 kDa), and Cat5 (238 kDa). Analysis of native PAGE revealed that Cat2, Cat3, and Cat4 were also produced in the cells anaerobically grown in the light. It is notable that only Cat2 was expressed much more strongly in response to the anaerobic condition. Enzyme activity staining demonstrated that Cat3 and Cat4 had bifunctional catalase-peroxidase activities, while Catl, Cat2, and Cat5 were typical monofunctional catalases. S1 cells grown aerobically in the presence of malate as the sole source of carbon exhibited an apparent catalase Km value of 10 mM and a Vmax of about 705 U/mg protein at late stationary growth phase. The catalase activity of Sl cells grown in the anaerobic environment exhibited a much lower Vmax of about 109 U/mg protein at late logarithmic growth phase. The catalytic activity was stable in the broad range of temperatures (30$\^{C}$-60$\^{C}$), and pH (6.0-10.0). R. rubrum S1 was much more resistant to H$_2$O$_2$in the stationary growth phase than in the exponential growth phase regardless of growth conditions. Cells of stationary growth phase treated with 15 mM H$_2$O$_2$for 1 h showed 3-fold higher catalase activities than the untreated cells. In addition, L-glutamate induced an 80-fold increase in total catalase activity of R. rubrum S1 compared with magic acid. Through fraction analyses of S1 cells, Cat2, Cat3, Cat4 and Cat5 were found in both cytoplasm and periplasm, while Catl was localized only in the cytoplasm.

• 기본간호학회지
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• 제9권3호
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• pp.399-411
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• 2002

Purpose: This study was done to investigate the application of complementary and alternative therapies (CAT) in patients with chronic liver disease. and to analyze the Influence of health locus of control (HLOC) on CAT. Method: Questionnaires on CAT and a multidimensional health locus of control (MHLOC) scale developed by Wallston and Wallston were completed by 141 patients. Result: Analysis showed that 44.7% of the patients had experience with CAT and 49.2% of the patients reported being willing to use CAT. Reliability scores for the scale were HLOC-I 0.7376, HLOC-P 0.6383, HLOC-C 0.7351. The mean scores for the HLOC were HLOC-I 24.86, HLOC-P 22.86, HLOC-C 16.00. There were no significant differences in mean scores for HLOC between the patients who had used CAT and those who had not. Eight response Patterns for HLOC were identified. Among them, 'yea sayer' was the largest group (27.0%). A significant difference was found in the 'yea sayer' pattern between the group who had used CAT and the group who had not. Conclusion: CAT relates to various cognitive factors such as HLOC. Further study is needed to examine the influence of HLOC on CAT and its response patterns.

• 기본간호학회지
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• 제13권2호
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• pp.275-284
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• 2006

Purpose: The purpose of this study was to analyze tile trends in physiological variables in CAT research in nursing in Korea. Method: Of studies published in Korea between January, 2000 and December, 2005, 227 studies were analyzed according to the criteria of type, theme, and patterns in physiological variables related to CAT. Results: There were 72 articles on CAT research in which physiological variables were examined. The most frequently researched type of CAT was massage and in particular, foot massage. The most frequently used physiological variables in CAT research were blood pressure, pulse, and body temperature. Patients with high blood pressure were the most frequent subjects for CAT research. As to the effect of physiological variable by CAT type, foot massage showed a decline in blood pressure in all six research studies involving patients with high blood pressure. Conclusion: There is a need to describe accurately the mechanism by which CAT affects physiological variables. There is also a need for repetitive analysis to verify the effect, and meta-analysis for the effect on physiological variables according to type of CAT.

• Journal of Ecology and Environment
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• 제32권4호
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• pp.229-236
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• 2009

A habitat model was developed to delineate potential habitat of the leopard cat (Prionailurus bengalensis) in a mountainous region of Kangwon Province, Korea. Between 1997 and 2005, 224 leopard cat presence sites were recorded in the province in the Nationwide Survey on Natural Environments. Fifty percent of the sites were used to develop a habitat model, and the remaining sites were used to test the model. Fourteen environmental variables related to topographic features, water resources, vegetation and human disturbance were quantified for 112 of the leopard cat presence sites and an equal number of randomly selected sites. Statistical analyses (e.g., t-tests, and Pearson correlation analysis) showed that elevation, ridges, plains, % water cover, distance to water source, vegetated area, deciduous forest, coniferous forest, and distance to paved road differed significantly (P < 0.01) between presence and random sites. Stepwise logistic regression was used to develop a habitat model. Landform type (e.g., ridges vs. plains) is the major topographic factor affecting leopard cat presence. The species also appears to prefer deciduous forests and areas far from paved roads. The habitat map derived from the model correctly classified 93.75% of data from an independent sample of leopard cat presence sites, and the map at a regional scale showed that the cat's habitats are highly fragmented. Protection and restoration of connectivity of critical habitats should be implemented to preserve the leopard cat in mountainous regions of Korea.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.164-167
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• 2009

본 논문에서는 LFSR(Linear Feedback Shift Register)과 2D CAT(Two-Dimensional Cellular Automata Transform)를 이용한 영상 암호화법을 제안한다. 먼저 LFSR을 이용하여 원 영상의 크기만큼 PN(pseudo noise) 수열을 생성한다. 그런 다음, 생성된 수열을 원 영상과 XOR 연산하여 원 영상을 변환한다. 그리고, 게이트웨이 값을 설정하여 2D CAT 기저함수를 생성한다. 생성된 기저함수를 변환된 원 영상에 곱하여 2D CAT 영상 암호화를 한다. 마지막으로, 안정성 분석을 통하여 제안한 방법이 높은 암호화 수준의 성질을 가졌음을 검증한다.

• 기본간호학회지
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• 제8권3호
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• pp.314-323
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• 2001

Purpose : Complementary and alternative therapies(CAT) are defined as those treatments and healthcare practices not taught widely in medical schools, not generally used in hospitals, and not usually reimbursed by health care insurance. Recently, CAT have become increasingly popular with health care consumers and health care professionals. This study investigated nurses' perceptions and experiences with CAT. Method: 124 nurses who were working in university hospitals in Seoul and Inchon were randomly selected as participants for this study. They answered open and closed questionnaires on their Perceptions and experiences with CAT. Results: Most of the subjects recognized the existence of CAT (86.3%), and expected a treatment effect from CAT when it is combined with conventional therapy (84.7%). Nurses accepted CAT positively as complement for conventional therapy and useful modalities of psychological support when its effects have been proven scientifically. Forty nurses (32.3%) had learned CAT including soojichim, aroma therapy, relaxation, meditation, music therapy, massage, and acupressure. Eight nurses (6.5%) used CAT with patients including soojichim, hand massage, relaxation, and music therapy. Conclusion: In spite of the nurses' positive perceptions of CAT, the nurses' professional experiences were quite limited. Nurses need authorized training programs and continuing education opportunities in CAT. This would increase their ability to use CAT. But to improve scientific knowledge more evidence based research is.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2009년도 추계학술발표대회
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• pp.463-464
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• 2009

기존 필드버스의 낮은 트래픽 전송률로 인하여 IEEE 802.3 이더넷이 필드버스의 대안으로 제시되었다. 하지만, 이더넷은 CSMA/CD 메카니즘을 사용하기 때문에 실시간 성이 떨어진다는 단점이 있다. 이러한 단점을 개선하기 위하여 EtherCAT이 개발되었다. 본 논문에서는 EtherCAT의 Cycle Time 성능을 분석하고 개선하기 위하여 M-EtherCAT을 제안한다. M-EtherCAT은 EtherCAT과 달리 각 Telegram이 Slave를 거치지 않기 때문에 EtherCAT 보다 Cycle Time의 최소 주기를 더 줄일 수 있다.

• 한국임상수의학회지
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• 제17권1호
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• pp.279-284
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• 2000

A 3.5kg, 3-year-old castrated male Japanese domestic cat withpelvic limb ataxia and dysuria was referred to the Veterinary Medical Center of the Tokyo University. On the neurologic examination findings, both pelivic had a LMN paresis. The cat was FeLV positive and FIV negative. Radiographic findings did not identify the spinal lesions. In magnetic resonance images(MRI) of the lumbar spinal cord, the cat had the lesions in the lumbar(L) 1 and L3, characterized by hyperintensity on a transverse T2-weighted and T1-weighted images, and contrast enhancement was evident. The mass removed by dorsal laminectomy. Histopathological examination of the mass revealed spinal lymphoma. Three weeks after the surgery, the cat administered chemotherapy protocol for lymphoma by current protocol. Two weeks after chemotherapy, the cat had a metastasis to bone marrow and died.