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CHARACTERISTIC POLYNOMIALS OF SOME WEIGHTED GRAPH BUNDLES AND ITS APPLICATION TO LINKS
Sohn, Moo-Young,Lee, Ja-Eun 國立 昌原大學校 基礎科學硏究所 1994 基礎科學硏究所論文集 Vol.6 No.-
In this paper, we introduce weighted graph bundles and study their characteristic polynomial. In particular, we show that the characteristic polynomial of a weighted K_(2) (??_(2)) bundles over a weighted graph Γ_(ω) can be expressed as a product of characteristic polynomials two weighted graphs whose underlying graphs are Γ As an application, we compute the signature of a link whose corresponding weighted graph is a double covering of that of a given link.
內耳組織의 Na^+, K^+ ATPase 分布와 알부민輸送에 關한 超微形態學的 硏究
손진호,박경란,이영호,노승무,김원식 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2
This study was carried out to investigate distribution of Na^+, K^+ -ATPase in the cochlear tissues by means of electron microscopic immunocytochemistry and transcytosis of albumin in the cochlear tissues. Ten cochleas obtained from guinea pigs were stained by avidin-biotin-peroxidase with anti-human Na^+, K^+ -ATPase rabbit IgG as primary antibody. Three guinea pigs were perfused with colloidal gold binding bovine serum albumin. Four were injected into the endolymphatic and perilymphatic spaces via oval and round windows. The cochlear tissues were observed with electron microscope. The results obtained were were as follows. Na^+, K^+ -ATPase was predominently distributed in basolateral infoldings and mitochondrial membranes and cristae, and moderately in the cytoplasmicn membrane and interdental cells. Albumin was distributed on the endothelial cells of the strial capillaries and surrounding interstitium. There were no albumins in marginal cells, intermediate cells, basal cells, Reissner' s membrane, and cells of the organ of Corti. According to the above results. it is suspected that transport of Na^+ and K^+ is performed in basolateral infoldings of marginal cells by active transport mechanism, and that immuncoytochemical method is more excellent to demonstrate Na^+, K^+ -ATPase than that of enzyme histochemistry. Transcytosis of albumin into the endolymphatics may be restricted by stria vascularis, Reissner' s membrane, and the cells of the organ of Corti.
박두병,전창무,손인기,민경준,김영돈,노병인 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.5
연구목적 : 감정표현불능증이 정신신체질환의 특징적인 성격 경향 인지에 대해 논란이 많이 있어 왔다. 이에 정신신체질환이면서 피부과 외래 환자의 다수를 차지하는 원형탈모증 환자에 있어서의 감정표현불능증에 대해 알아보았다. 방 법 : 원형탈모증 환자군(31명)과 연령, 성별을 대비시킨 정상대조군(31명)에서 MMPI, SCL-90-R, TAS-20K를 시행하였다. 정신신체질환 이외의 질환에 의한 영향을 배제하기 위해 다른 정신과 질환이 있다고 판단되는 경우는 제외시켰다. 집단간의 비교를 위해 paired t-검증을 실시하였다. 결 과 : 원형탈모증 환자군에서 MMPI 결과는 F 척도, K 척도, Hs 척도, D 척도, Hy 척도, Pd 척도, Pa 척도, Pt 척도, Sc 척도의 점수가 정상대조군에 비해 의미있는 차이를 보였고(p<0.05), SCL-90-R 점수에서는 SOM 척도, O-C 척도, I-S 척도, DEP 척도, ANX 척도, HOS 척도, PHOB 척도, PAR 척도, PSY 척도, GSI, PSDI, PST 점수가 정상대조군보다 유의하게 높은 점수를 보였다(p<0.05). 또한 TAS-20K 점수에서는 환자군이 정상대조군에 비해 Factor 1과 총점에서 유의하게 높은 점수를 보였다(p<0.05). 결 론 : 결론적으로, 원형 탈모증 환자군에서 정상 대조군에 비해 감정표현불능증이 더 심하고 특히 자신의 느낌을 잘 알지 못하는 것으로 나타났다 이는 원형탈모증 환자의 심리적인 대처기전을 세워 나가는데 좀더 주의를 기울이고, 더 많은 관심을 가져야 한다는 것을 의미한다. Objectives : Alexithymia has been regarded as the general personality of psychosomatic disease, but it's controversial. The object of the study is to find out the relationship between alexithymia and alopecia areata. Methods : Thirty one alopecia areata patients were compared to 31 normal healthy persons in alexithymic tendency using TAS-20K Also MMPI and SCL-90-R were checked in both groups. Psychiatric diseases were ruled out. Results : The scores of F, K, Hs, D, Hy, Pd, Pa, Pt and Sc of MMPI in alopecia areata patients were different from those in normal healthy persons. The scores of SOM, O-C, I-S, DEP, ANX, HOT, PHOB, PAR, PSY,GSI, PSDI, and PST of SCL-90-R in alopecia areata patients were significantly higher than those in normal healthy persons. In TAS-20K, the scores of Factor I and Total in alopecia areata patients were higher than those in normal healthy persons. Conclusion : Our results suggest that alopecia areata patients are more alexithymic than normal healthy persons.
Domination in graphs of minimum degree four
Moo Young Sohn,Yuan Xudong 대한수학회 2009 대한수학회지 Vol.46 No.4
A dominating set for a graph G is a set D of vertices of G such that every vertex of G not in D is adjacent to a vertex of D. Reed [11] considered the domination problem for graphs with minimum degree at least three. He showed that any graph G of minimum degree at least three contains a dominating set D of size at most 3/8|V(G)| by introducing a covering by vertex disjoint paths. In this paper, by using this technique, we show that every graph on n vertices of minimum degree at least four contains a dominating set D of size at most 4/11|V(G)|. A dominating set for a graph G is a set D of vertices of G such that every vertex of G not in D is adjacent to a vertex of D. Reed [11] considered the domination problem for graphs with minimum degree at least three. He showed that any graph G of minimum degree at least three contains a dominating set D of size at most 3/8|V(G)| by introducing a covering by vertex disjoint paths. In this paper, by using this technique, we show that every graph on n vertices of minimum degree at least four contains a dominating set D of size at most 4/11|V(G)|.
THE BONDAGE NUMBER OF C<sub>3</sub>×C<sub>n</sub>
Sohn, Moo-Young,Xudong, Yuan,Jeong, Hyeon-Seok Korean Mathematical Society 2007 대한수학회지 Vol.44 No.6
The domination number ${\gamma}(G)$ of a graph G=(V,E) is the minimum cardinality of a subset of V such that every vertex is either in the set or is adjacent to some vertex in the set. The bondage number of b(G) of a graph G is the cardinality of a smallest set of edges whose removal from G results in a graph with domination number greater than ${\gamma}(G)$. In this paper, we calculate the bondage number of the Cartesian product of cycles $C_3\;and\;C_n$ for all n.
Young Moo Choo,Kwang Sik Lee,Hyung Joo Yoon,Bo Yeon Kim,Mi Ri Sohn,Jong Yul Roh,Yeon Ho Je,Nam Jung Kim,Iksoo Kim,Soo Dong Woo,Hung Dae Sohn,Byung Rae Jin 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.10
Bee venom contains a variety of peptides and enzymes, including serine proteases. While the presence of serine proteases in bee venom has been demonstrated, the role of these proteins in bee venom has not been elucidated. Furthermore, there is currently no information available regarding the melanization response or the fibrin(ogen)olytic activity of bee venom serine protease, and the molecular mechanism of its action remains unknown. Here we show that bee venom serine protease (Bi-VSP) is a multifunctional enzyme. In insects, Bi-VSP acts as an arthropod prophenoloxidase (proPO)-activating factor (PPAF), thereby triggering the phenoloxidase (PO) cascade. Bi-VSP injected through the stinger induces a lethal melanization response in target insects by modulating the innate immune response. In mammals, Bi-VSP acts similarly to snake venom serine protease, which exhibits fibrin(ogen)olytic activity. Bi-VSP activates prothrombin and directly degrades fibrinogen into fibrin degradation products, defining roles forBi-VSP as a prothrombin activator, a thrombin-like protease, and a plasmin-like protease. These findings provide a novel view of the mechanism of bee venom in which the bee venom serine protease kills target insects via a melanization strategy and exhibits fibrin(ogen)olytic activity.