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Electrical Switching Phenomena in V_2O_5 - TeO_2 Glass Semiconductors
RHEE, Chunghi,YOON, Se Won 慶熙大學校 1974 論文集 Vol.8 No.-
10∼70 mole%를 포함한 몇개의 V_2O_5-TeO_2유리의 電流-電壓 特性이 유리의 組成 成分과 電極사이 간격에 따라서 조사되었다. 유리표면에서 非可逆的인 스윗칭이 한번 일어난 後에는 電壓을 每번 올렸다 내림에 따라 S型. 負性微分抵抗 特性이 再現됨을 發見하였다. 첫번째 스윗칭이 생긴후 形成된 필라멘트가 結晶化 하는 것으로 보아 스윗칭 현상은 不規則的인 유리質 狀態로부터 規則的인 結晶質 狀態로의 相變化와 관계됨을 알수있다. 結晶化된 狀態는 構造가 安定하여 S型 特性을 再現시키며 이 現象은 電子的 過程보다는 熱 果에 현저히 基因하고 있다. Current-voltage characteristic of se-veral V_2O_2-TeO_2 glasses containing 10-70 molar percent V_2O_2 was investigated as a function of composition and electrode separation. It has been found that the irreversible switching phenomenon occurs once on a virgin surface of the glasses and s-type negative differential resis-tance is reproduced in each voltage recycling. Evidence of devitrification of the filament formed after the first switching reveals that the switching action is associated with a phase transi-tion from a disordered glassy-state to an ordered devitrified-state due to self-heating effects. The devitrified state is structure stable and yields a reproducible s-type characueristic, which is attributed predominantly to thermal effects rather than to electronic processes.
( Se Hee Yoon ),( Nak Won Choi ),( Sung Ro Yun ) 대한내과학회 2010 The Korean Journal of Internal Medicine Vol.25 No.1
Background/Aims: The aim of this study was to evaluate the peritonitis-causing bacteria detected in peritoneal fluid using a blood culture bottle in patients undergoing continuous ambulatory peritoneal dialysis (CAPD). Methods: One-hundred and eleven dialysates from 43 patients suspected of peritonitis related to CAPD were retrospectively evaluated between May 2000 and February 2008. In all cases, 5 to 10 mL of dialysate was inoculated into a pair of BacT/Alert blood culture bottles, and 50 mL of centrifuged dialysate was simultaneously inoculated into a solid culture media for conventional culture. The results were compared to those of the conventional culture method. Isolated microorganisms were compared between the two methods. Results: The blood culture method was positive in 78.6% (88/112) of dialysate specimens and the conventional culture method in 50% (56/112, p<0.001). Conclusions: The blood culture method using the BacT/Alert system is useful for culturing dialysates and improves the positive culture rate in patients with suspected peritonitis compared to the conventional culture method. (Korean J Intern Med 2010;25:82-85)
Oriental Thought and Unified Science
Yoon, Se-Won 세계평화교수협의회 1973 아카데미論叢 Vol.1 No.1
After reading Full Circle, I was so much impressed that it was the beginning moment for both civilizations of the East and the West to start to melt together and remain in harmony themselves. I have only a slight knowledge of the history of natural science, but I understand the historical and fundamental backgrounds of natural science, which is advocated and developed mostly by the western countries, throght my consecutive studying and teaching in physics. As an oriental, I am sure that up to my father's generation all intellectuals learned such subjects as polities, economics, religion, literature and natural science based on oriental philosophy. Although I am align from my fathers' way of thinking in intellectual fields, naturally my way of living, viewpoint and personality have been brought about under the same philosophical influence as our ancestors. Benefited by the consequence with which oriental thoughts are oblized, I find the similar thoughts hidden in Full Circle; thus, it seems to me, in fact, that the philosophy, civilization, way of life, religion and politics which are enjoyed by the orient are in harmony with the thought of Unified Science. Oriental thought was not originally divided into scientific culture and literary culture. This consequence is esentially due to the beginning point of oriental thought which unify the whole phenomena of man and nature. It is known that the first legendary Emperor of China, Fu-I, derived the idea of world creation and the Yellow Emperor, Huang-Ti deried the theories of the dual power of Yin and Yang and the five elements. Lao-Tze and Confucius, the famous philosophers six centuries before Christ, arranged and systemized the oriental thoughts up to their time in their books. The book of change, Chou-I, which was originally described by Confucius and lately supplemented by Che-Tze mentions that gentleman is such a man that his virtue is consistent with heaven and earth, his brightness with sun and moon, his order with four seasons, and his fate with spirit. Moreover this oriental thought has not only reigned over the spiritual power of our ancestors without any remarkable changes in its ruling principles, but also has been very active in our oriental subconsciousnesss. The original point of our oriental thought started from Taoism, the principle of which is to form a picture of the cosmogony or philosophy of the origin of the world. In other words, the conception of Taoism is similar to the following quotation out of St. John's Gospel,)chap 1, verse 1) "In the beginning was the word, and the word was with God, and the word was God." To express it in more familiar terms, the conception of Tao is the Way, and is also subdivied into the other as an indivisible entity. The following is quoted from Lieh-tze, the oldest author who proposed a creation theory. "……starts from chaos, in which the three primary elements of the universe, force, form and sub-stance were still undivided. The first stage is followed by a second, the great inception, when force becomes separated, then by a third, the great beginning, when form appears and a fourth, the great homogeneity, when substance becomes visible. The light and pure substance rise above and form heaven, the heavier and coarser sink down and produce the earth."