이온 주입을 이용한 실리콘 나노선의 전기적인 특성 연구 및 전계효과트랜지스터 응용

이승용,이상권 한국물리학회 2009 새물리 Vol.59 No.3

We have successfully studied electrical characteristics of intrinsic Si nanowires prepared using standard B-ion implantation with a dose of 1×1011, 1×1012, and 1×1013 ions/cm2 and at energy of 10 keV. After B-ion implantation on intrinsic Si nanowires, we found that the resistance (R) and resistivity (ρ) of B-implanted Si nanowires decreased about ~ 106 times compared to intrinsic Si nanowires. From our I-V characteristics, it is also noted that implanted B-ions in Si nanowires were behaved the hole carriers. In addition, we demonstrated p-type Si nanowire field-effect transistor (p-Si NW FET) prepared by B-ion implantation with a dose of 1×1013 ions/cm2 and at energy of 10 keV. The electrical characteristics of B-implanted Si NW FET showed a clear p-type FET behavior with a hole mobility of ~5.7 cm2/V•s and hole concentration of 1×1019 cm-3. 본 논문에서는 이온주입 (ion implantation) 방법을 이용하여 고유 반도체 특성을 가지는 실리콘 나노선 (silicon nanowires) 의 전기적인 특성에 관한 연구를 진행하였다. 합성한 (As-synthesis) 상태에서 매우 큰 저항을 가지는 고유 반도체 실리콘 나노선에 각각 B (붕소) 이온의 dose 량을 1×1011, 1×1012, 그리고 1×1013 ions/cm2 주입을 해준 결과 저항과 비저항 값이 최대 약 ~106 정도 낮아졌음을 알 수 있었으며, 이를 통하여 이온 주입된 B 이온이 캐리어 (carrier)로 작용하였음을 확인할 수 있었다. 추가로 B 이온의 dose 량이 1×1013 ions/cm2 이온 주입된 p-type 실리콘 나노선을 이용하여 후면게이트 (back-gate) 전계효과트랜지스터 (field-effect transistors)를 제작하였으며 전류-전압 (current-voltage) 특성 측정 결과 캐리어의 이동도 (mobility) 와 농도 (concentration) 는 각각 ~5.7 cm2/V•s 와 ~1×1019 cm-3 였음을 확인하였다. 나노 반도체물질에 기존의 in-situ 도핑이 아닌 선택적인 영역에 도핑이 가능한 이온주입법을 이용하여 다각적인 연구를 계속적으로 추진한다면 나노선을 활용한 전자소자 구현에 기여 할 것이라 판단된다.

의료관광코디네이터에 대한 인식도와 역할 제고에 관한 연구

이승용,김선이 한국호텔관광학회 2011 호텔관광연구 Vol.13 No.4

This study was set out to provide the basis for systemized special program and the direction for its growth to improve the role of the medical tourism coordinators in the global era. As the investigative tool, the survey was conducted to figure out the awareness and experiences for the level of awareness for the coordinators and the questions asked about the association with the visits to the hospital. Moreover, as the direct objective of this study, the survey asked questions about the directions for the role of medical tourism coordinators. The key findings from the study are as follows. In relation to the level of awareness, those who have experienced the awareness constituted the majority while the actual cases of consultation were not many, failing to show significant differences. Despite this, those who intended to visit the hospital after the consultation exceeded the majority, indicating that the consultation with the coordinators was one of the important variables. Based on the analysis of the level of awareness for the revitalization of the role of coordinators, the results obtained are as follows. First, the responses said that the personality education and promotion were the most important in terms of the categories in the necessary roles. Second, as for the level of interest, the friendliness and service of the coordinators were found to be more important than anything by the level of the respondents. Also, the women were found to have a higher level of awareness in all categories. Third, as for the importance of the role and service, the order came out to be ‘the reliability of the consultation’, followed by the ‘specialization’, ‘friendliness’ and ‘safe information management’. The coordinators in the hospital just for the domestic patients may be limited to the management of employee and patients and consultation. However, for the overseas medical tourism, it is safe to say that the coordinators act as very important medium, acting as the foundation for the revitalization and the growth of the medical tourism. In particular, as for the coordinators in the hospitals for the foreigners, more systemized education and management on various abilities and actual experiences be essential elements in the future.

소수성 가소제 Diethylphthalate가 Ethylcellulose 필름으로부터의 살리씰산 방출에 미치는 영향

이승용,신상철,이민화,심창구 대한약학회 1984 약학회지 Vol.28 No.3

Release characteristics of salicylic acid from ethylcellulose(EC) films containing varying ratio of dieththylphthalate (DEP) were studied. Mathematical analysis of the release data showed that the release behavior actually conforms with the Higuchi's diffusion-controlled model. The release rate constants(k) were independent from the film thickness and the pH of release medium, but were proportional to the concentration of salicylic acid itself. The logarithm of the release rate constant (log k) increased as the concentration of DEP was increased. In conclusion, hydrophobic plastisizer DEP seemed to be very useful in controlling release rate constant of slightly soluble drugs as like salicylic acid without changing it's release characteristics.

포르투갈어 명령문

이승용 한국외국어대학교 언어연구소 1977 언어와 언어학 Vol.5 No.-

江華學派 李匡師 家門의 家門文學 계승의 실제적 양상에 대하여

이승용 동양고전학회 2024 東洋古典硏究 Vol.- No.94

This study targeted on the selected poems of the members of Lee Kwangsa’s Jeonju Lee Family Deokcheongun Clan, which represent Ganghwa School among Soron Academic Circle during the late Joseon Dynasty, abstracts of their poems. This study examined the actual aspects of succeeding the poetic literature by dividing into “direct succession through poetry writing” and “indirect succession through selected poems.” In the “direct succession through poetry writing,” this study analyzed the long poems created by Lee Kwangsa and his two sons, Lee Geungik and Lee Yongik. Their poems were written in the same format of 90 semantic characters(韻). Their poems were also written in the similar tones and expressed their inner side straightly in the form of verbal message. These are the common characteristics found in the long poems written by Lee and his two sons. In addition, the creation of the long poems extends beyond temporary exchange of poems. The format of 90 semantic characters is also utilized in creating other poems, and this shows continuity of creation. Lee enjoyed creating long poems and expressing is inner thoughts honestly during his exile at Puryong County. His tendency and method of creating poems were succeeded directly to his two sons. In the “indirect succession through selected poems,” this study targeted the poems from Hyeopjungjip(篋中集), compiled by Lee Sangsun to collect the poems of the ancestors. Then, this study sorted and analyzed the poems that show the continuous flow and common characteristics in the poetic literature. The representative poem is the several successive lines of verses(Yeongusi, 聯句詩) included under the subtitle of "Yeongujip” at the end of Hyeopjungjip(篋中集). The several successive lines of verses are created between Lee family’s father and son, uncle and nephew, brothers, and cousins. Like long poems, the several successive lines of verses were continuously created by the family’s Gwang Generation and Ik Generation. The poems also share the same creative backgrounds, which are training the poem and solidifying the bond of family members. The fact that the collection of poems was compiled by collecting several figures, instead of specific person of the family shows that the tradition poetic literature was continued in the level of family.

損窩 崔錫恒의 贐行詩에 대한 일고찰

이승용 동양고전학회 2023 東洋古典硏究 Vol.- No.91

This study focused on Farewell Poem(贐行詩) by Choi Seok-hang to examine the type of poem format Choi Seok-hang preferred and look into key figures who interacted with Choi Seok-hang during that time. Then, this study explored the techniques Choi Seok-hang used in Farewell Poem(贐行詩) to figure out his habits and patterns in poetical composition. First, Choi Seok-hang preferred a poem format with Chironnyulshi, and he mainly interacted with figures who were members of Soron Party(少論) at that time. Considering that Choi Seok-hang did not leave much of Farewell Poem(贐行詩), it is assumed that the recipients of Farewell Poem(贐行詩) in 『Sonwayugo(損窩遺稿)』 had a close relationship with Choi Seok-hang. Secondly, this study analyzed the format of Farewell Poem(贐行詩) and took a closer look into the sentence writing and composition techniques that Choi Seok-hang used to deliver the feelings of farewell effectively. According to analysis results, Choi Seok-hang often suggested the places and situations that recipients may face in the future, instead of describing the farewell situations. In addition, Choi Seok-hang said farewell to different figures but showed a habit of composing the poems with similar phrases, images, and words for the similar farewell situation. In composition of Farewell Poem(贐行詩), Choi Seok-hang actively adopted a standardized format of Chironnyulshi to maximize the beauty of expression with matching phrases and sentence writing techniques, rather than utilizing various formats and attempting new poems. Choi Seok-hang also selectively used the words and phrases that best matches the farewell situation, rather than finding new words and phrases. The Farewell Poem(贐行詩) by Choi Seok-hang mostly expresses the restrained emotions and lingering feelings of the poetic self, instead of revealing the feelings of farewell. Such a tendency is closely related to his preference for the Chironnyulshi poem format and his habit and pattern of poetical composition.

근대계몽기 석정 이정직의 논어관과 학습의 방향

이승용 동양고전학회 2018 東洋古典硏究 Vol.0 No.71

Seokjeong JEONG-JIK LEE is a scholar who tried to render a form of service for his country by writing works of literature during the crisis of the Period of Modern Enlightenment. He mainly expressed his perception of reality through an evaluation of historical figures. He left behind a text on the Analects of Confucius, which is known as the ‘10 questions and answers regarding the Analects of Confucius’, in his posthumous work. It seems that he wrote it to be used as lecture material for his students. The purpose of this thesis is to analyze his recognition to the Analects of Confucius and its learning direction expressed in the writing ‘10 questions and answers regarding the Analects of Confucius’. With respect to the word ren(仁), which is the most fundamental concept of the Analects, he viewed his life in an introspective way from the standpoint of a ‘Hoinyupe(好仁有蔽)’, which means that if you like kindness and fairness but don’t like learning it, then there will be negative effects, and through the ‘Gwangwajiin(觀過知仁)’, which means that you will know for sure kindness and fairness when you observe wrongdoing, not the general viewpoint of ‘Humaneness or Love’. He tried to determine the meaning of ren, and virtue(德) through a common denominator from an overall point of view. It might have been a reflection of his thoughts that a sound comprehension of powerful countries was needed. In terms of relationship between Gunja(君子) and Myeong(命), Gunja needs to make constant efforts to understand Myeong as a talented person who can maintain order. The direction of learning was examined under three categories: Jongipjibang(從入之方), Gunjajiryu(君子之類), and Sumunihae(隨文而解). Jongipjibang is defined as a way to complement the weaknesses of leaners according to their characteristics and it promotes a focus on pushing ethics into practice rather than acquiring knowledge as it is today. Gunja was classified into 3 stages. However, it merely provides standards to help learners’ understandings, so not all students may fall into these stages. Sumunihae gives explanations of commentaries on the book. Seokjeong remarked that the meaning was not different even if the same concept was annotated differently in the “Four Books”. This is because the context was emphasized according to the principle of ‘Sosisojeol Pilchakpilseom (所始所切, 必着必贍)’.

李匡師의 학문 경향과 지식수용 방식에 대하여 − 『圓嶠集選』 수록 雜著‧雜文을 중심으로 −

이승용 동양고전학회 2023 東洋古典硏究 Vol.- No.92

This paper focuses on the fact that although Japjeo(雜著) and Japmun(雜文) are basically written in a style in which miscellaneous opinions or stories are freely written without a fixed format due to the nature of the writing, they are materials that can provide a glimpse into the author's usual thoughts on the subject of interest, insight into it, and academic attitude. Therefore, we looked into Lee Kwang Sah(李匡師)'s academic tendency, knowledge acceptance method, and verification process that had not been paid attention until now. Lee Kwang Sah(李匡師), a member of Ganghwa School(江華學派) and famous calligrapher in the late Joseon Dynasty, paid a lot of attention to the fields of Gyeonghak, historical studies, scripture, and phonology in addition to calligraphy and Chinese poetry, and traces of it could be found in Japjeo(雜著)‧Japmun(雜文) included in 『WonGyojipseon(圓嶠集選)』. As can be seen from Lee Kwang Sah(李匡師)'s remarks, it is undeniable that the academic tendency to criticize ‘Heo(虛)’ and value ‘Sil(實)’ and pursue degree of things and Erudite learning was greatly influenced by Kanghwa study(江華學), which was passed down by Jeong Je du(鄭齊斗) and Yoon soon(尹淳). However, it cannot be asserted that Kanghwa study(江華學) encompasses all of Lee Kwang-sa's academic trends. Individual Lee Kwang Sah(李匡師)'s academic tendency and practice, which are one step away from the category of Kanghwa study(江華學), were most evident in Japjeo(雜著) and Japmun(雜文), which presented their areas of interest and insights. The articles included in Japjeo(雜著) and Japmun(雜文) clearly confirm the academic trend of Lee Kwang-sa, who recognized not only the macroscopic but also the microscopic areas as objects of inquiry. In the article on "Critical Perspective and Logical Approach," Lee Kwang Sah(李匡師)'s rational thinking and meticulous analysis of knowledge and information were seen. In addition, in the article related to "questioning and dialectic of universal knowledge," the process of correcting existing wrong knowledge was closely seen through presenting clear grounds based on reading and academic, not based on unfounded personal experiences. This knowledge acceptance method and verification process are one of the pillars of Lee Kwang Sah(李匡師)'s actual academic trends along with the academic trends represented by Kanghwa study(江華學).

문화관광축제의 교육적 요인이 축제 만족과 행동의도에 미치는 영향 관계:익산 서동축제를 중심으로

이승용,김석출 한국관광학회 2008 관광학연구 Vol.32 No.1

Educational element has been playing significant role in a number of festivals in Korea. This study is to identify whether the correlationship exists among the variables such as educational program satisfaction, overall satisfaction and behaviour intention in case of Iksan Seodong Festival 2006. It was found that educational program satisfaction had positive correlation with both overall satisfaction and behaviour satisfaction. In addition, overall satisfaction and behaviour intention was also found to be positively correlated. This implies that the festival visitors’ educational needs are very important and extended educational programs must be developed for the success of the festival.

셀룰러 오토마타를 이용한 뇌 영역 추출에 관한 연구

이승용,허창우,류광렬 한국정보통신학회 2003 한국정보통신학회논문지 Vol.7 No.7

본 논문은 뇌 자기공명영상에 대해 셀룰러 오토마타를 이용하여 뇌 영역을 추출한 연구이다. 입력된 뇌 자기공명영상의 배경영상을 임계값으로 제거한다. 임계값은 히스토그램 분석기법으로 설정된다. 분리된 영상정보는 셀룰러 오토마타 규칙을 적용하여 뇌 영역을 추출한다. 실험결과 평균 PSNR은 42㏈이상 향상되었으며, 상관도 측정 결과 98%이상 일치되었다. 본 연구 결과는 의료 뇌 영상의 자동 진단 시스템 등에 활용 할 수 있다. This paper describes the extraction method for cerebro-region using cellular automata from the cerebrum MR images. The cerebro-region extracted from applying the cellular automata rules obtained from histogram distribution analysis after removing the background image from the cerebro-region by determining the critical value. The experiment results showed that PSNR is 42㏈ on the image quality and the correlation factor is estimated 98%. And the result can be used as the medical auto-diagnostics system of cerebrum.