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내부에 피라미드 구조를 가지는 ISB 판넬의 정적 특성 분석
안동규,이상훈,김민수,한길영,김진석,정창균,양동열 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
The objective of this research work is to investigate into static characteristics of ISB panels with the pyramidal structure as a internally structured material. In order to investigate the behavior of material deformation and frracture characteristics, several tensile tests have been carried out for the ISB panel and skin sheet. Through the results of the experiments, the mechanical properties of ISB panel and skin sheet and fracture characteristics have been obtained. In addition, the mechaical properties of the ISB panel have been compared with that of the skin sheet by the view point of a specific modulus, a specific yield strength and a specific strength. From the results of the comparision, it has been shown that the ISB panel has an excellent static characteristics.
안삼근,강형철,안상열,이균필,변희섭 경상대학교 농업생명과학연구원 2002 농업생명과학연구 Vol.36 No.4
본 연구는 집성 염색 무니목 개발을 위하여 사용 가능한 수종과 3종류의 염료를 사용하여 염색시간, 염색온도, 함수율 및 Flitch 제작에 대하여 연구한 결과는 다음과 같다. 실험에 사용한 4수종 중에서 선삭성이 불량한 은수원 사시나무를 제외한 3수종인 소나무와 이태리 포플러, 마티카가 사용 가능한 수종으로 밝혀졌다. Stain은 번지거나 얼룩이 지는 현상, Dylon은 침투 불균일로 부적당하였으나 Fine은 염색상태가 양호하였다. 염색시간은 5시간 이상 되어야 염색정도가 양호하였고, 염색온도는 90℃에서 가장 적당하였으며 생재와 기건재 및 포수재에 대한 영향은 큰 차이가 없었다. Flitch제작에 적당한 함수율은 9%이었다. This study was carried out to develop laminated dyeing wood, for which usable three sixties of trees and 3 kinds of dye stuffs were used to investigate dyeing time, dyeing temperature, moisture content and manufacture of flitch, the results were as follows: Out of four species of trees used in the experiment, it was found that three species, Pinus densiflora, Populus euramercana and Dyrea costulata were usable excluding Populus tomentiglandulosa whose cutting ability was bad. As to influence according to the kind of dye stuff, the Stain of low price could be used as a coloring agent but it was not proper as a dyeing agent due to spreading or staining phenomenon. As Dylon which was generally used to dye textile penetrated them uneven, dyeing only their surface, it was also found improper to be used. On the other hand, the dyed condition was good with Fine. The dyed condition was good when dyeing time was more than 5 hours and it was the most adequate when the temperature was at 90℃. There was no significant difference between their influence on green, dried and saturated wood.-In the manufacture of Flitch, the most appropriate moisture content was 9%.
성정현,김성균,김상혁,김호섭,박준석,안달 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1
본 논문에서는 신호의 분리와 합성이 가능한 Diplexer를 제작하였다. 저역 통과 여파기와 고역 통과 여파기의 특성을 정합하여 Diplexer로 구현함으로써 신호의 분리와 합성이 가능하다는 것을 시뮬레이션을 통해 확인하였다. 또한 신호의 분리와 합성의 가능성을 입증하기 위해 실제 마이크로스트립구조의 Diplexer를 제작, 측정한 결과 각각의 통과 대역폭 내에서 0.4dB, 0.8dB이내의 삽입손실과 -20dB의 반사손실이 됨을 실험결과를 통해 알수 있었고 또한, 인덕터의 구현 방법을 마이크로스트립으로 하여 주파수 특성과 재현성을 높였다.
홍성균,이성수,안규동,이병국 순천향대학교 산업의학연구소 2001 순천향산업의학 Vol.7 No.1
Ki is emerging and getting popular as a new alternative therapy in new millenium. The purpose of this study was to investigate the understanding and experience of the Ki therapy for college students. 320(Male=138, Female=182) students were participate in this study. Study subjects were answered with prepared 8 questions for their personal opinion and experience about Ki therapy. Study variables about personal information such as sex, blood type, religion, health status, personality, parent's religion, parent' occupation and parent educational level were also collected. The results of this study were as follows; 1 Among all study students (n=320), 89% of students answered positively in the existence of Ki, whereas only 11% answered negatively. 2. Among all study students (n=320), 13% (n=41) of students had a chance to have a Ki therapy and among 41 students 93% of them had experienced real Ki in any kind of form. 3. Among 41 Ki experienced students, 32% of students felt a feeling of floating and flying, 25% of students felt a feeling of pulling from the back and 21% of students felt a feeling of warming and comfortable, 10% of students felt refreshment and 5% of students felt a feeling of dizziness, whereas only 7% of students did not feel anything from Ki therapy. 4. While 53% of students among 41 Ki experienced students experienced their Ki in Ki training center, 31% and 6% of students experienced in college or university and other place, respectively. 5. Among all study students, 89% of students thought that Ki therapy was useful and wanted to have Ki therapy in case of medical attention, whereas only 11 % of students did not want Ki therapy. 6. Among study students with positive thinking about Ki therapy, 24% and 23% of students thought Ki therapy useful for (endocrine and skin diseases) and chronic adult diseases such as hypertension, cardiac disease, diabetes and obesity, respectively, whereas 21% and 18% of study students thought Ki therapy useful for neuropsychiatric disease and digestive diseases, respectively. 7. Regarding to the reason of attraction of Ki therapy compared with other treatment methods, 51% of students answered that Ki therapy gave comfortable and easiness to mind and 42% of students answered that it did not need any kind of injection or medicine.
Electronic Structure of Graphene Grown on a Hydrogen-terminated Ge (110) Wafer
Sung Joon Ahn,Hyun Woo Kim,Ishwor Bahadur Khadka,Krishna Bahadur Rai,Joung Real Ahn,Jae-Hyun Lee,Seog Gyun Kang,Dongmok Whang 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.73 No.5
Using angle-resolved photoemission spectroscopy, we studied the electronic structure of graphene grown on a Ge (110) wafer, where a single-crystal single-layer graphene was recently grown using chemical vapor deposition. The growth mechanism of the single-layer single-crystal graphene was related to the hydrogen termination of the Ge (110) surface. To further understand the growth mechanism, we measured the electronic structure of the graphene-covered Ge (110) wafer in a vacuum as a function of the increasing temperature, which led to a deintercalation of the hydrogen atoms. Furthermore, we measured the electronic structure after the reintercalation of the hydrogen atoms between the Ge substrate and graphene. These findings show that hydrogen is intercalated between the Ge substrate and graphene after the growth of graphene using chemical vapor deposition.
Patterns of care for patients with nasopharyngeal carcinoma (KROG 11-06) in South Korea
Sung, Soo Yoon,Kang, Min Kyu,Kay, Chul Seung,Keum, Ki Chang,Kim, Sung Hwan,Kim, Yeon-Sil,Kim, Won Taek,Kim, Ji-Yoon,Kim, Jin-Hee,Moon, Sung Ho,Ahn, Yong Chan,Oh, Young Taek,Wu, Hong-Gyun,Lee, Chang-Ge The Korean Society for Radiation Oncology 2015 Radiation Oncology Journal Vol.33 No.3
Purpose: To investigate the patterns of care for patients with nasopharyngeal carcinoma (NPC) in South Korea. Materials and Methods: A multi-institutional retrospective study was performed (Korean Radiation Oncology Group [KROG] 11-06) on a total of 1,445 patients from 15 institutions. Results: Of the 1,445 patients, more than half were stages III (39.9%) and IV (35.8%). In addition to patterns of care, we also investigated trends over time with the periods 1988-1993, 1994-2002, and 2003-2011. The frequencies of magnetic resonance imaging and positron emission tomography-computed tomography were markedly increased in the third period compared to previous 2 periods. Concurrent chemoradiation (CCRT) was performed on 894 patients (61.9%), neoadjuvant chemotherapy on 468 patients (32.4%), and adjuvant chemotherapy on 366 patients (25.3%). Of stage II-IV patients, CCRT performed on 78.8% in 2003-2011 compared to 15.0% in 1988-1993. For patients treated with CCRT, cisplatin was the most commonly used agent in 81.3% of patients. Over the periods of time, commonly used radiotherapy (RT) techniques were changed from 2-dimensional RT (1988-1993, 92.5%) to 3-dimensional RT (2003-2011, 35.5%) or intensity-modulated RT (IMRT; 2003-2011, 56.5%). Median RT doses given to primary tumors, high-risk lymphatics, and low-risk lymphatics were 70.0 Gy, 58.1 Gy, and 48.0 Gy, respectively. Adoption of IMRT increased the dose per fraction and escalated total radiation dose. Conclusion: Assessment of the patterns of care for NPC patients in South Korea demonstrated that management for NPC including diagnostic imaging, treatment regimen, RT techniques and dose schedule, advanced in accordance with the international guidelines.
22q11.2 결손 증후군 (DiGeorge 증후군)의 산전 진단 2예
박성균 ( Sung Kyun Park ),전균호 ( Gyun Ho Jeon ),노현진 ( Hyun Jin Roh ),안송미 ( Song Mi Ahn ),김선권 ( Sun Kwon Kim ),심재윤 ( Jae Yoon Shim ),김성훈 ( Sung Hoon Kim ),원혜성 ( Hye Sung Won ),이필량 ( Pil Ryang Lee ),김암 ( Ah 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.9
Before the exact location of its chromosomal abnormality was identified, 22q11.2 deletion syndrome was described as many different names depending on its presenting clinical features. Patients with this syndrome have a wide range of findings such as cardi