부추 전용 포장 결속기 개발

김용석(Yong-Seok Kim),박성희(Sung-Hee Park),박태표(Te-Pyo Park),양순용(Soon-Young Yang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

An Allium-odorum is difficult material to handling, because it is soft and weak as mechanical. For bundling work of allium-odorum, we must grip in the bundle shape of unit weight, however, it is difficult that grip allium-odorum by hand because the bundle bulk is very big. Especially, in packing work, the bundle shape of allium-odorum package than other vegetables is very important, because difference of a price becomes much according to the bundle shape. In this paper, we propose bundling mechanism for a quadrangle shape in bundle shape, and semi-automatic bundling mechanism that makes use of a eccentric roller and a triangularity link. We carry out mechanical modeling and analysing respectively using the CATIA V5 and SimDesigner. We manufactured the prototype of the semi-automatic bundling machine, and got satisfied result through field test. And this machine will be commercialized and announced soon.

채소 자동결속기 개발

김용석(Yong-Seok Kim),김재준(Jea-Jun Kim),박태표(Te-Pyo Park),양순용(Soon-Young Yang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

In this paper, we propose an automatic vegetable-bundling mechanism that makes use of heat melt sticking. The proposed mechanism is made of three modules for aligning, shaping, and bundling. Using the SMO(SimDesigner Motion) module, we optimize condition of mechanical movement of the bundling mechanism. We manufactured the prototype of the automatic bundling machine. Also we carried out directly the field test for verification of performance in farmhouse which produces vegetable, and we got satisfied result. This machine will be commercialized and announced soon.

Organic Solar Cells: Solution‐Processable Reduced Graphene Oxide as a Novel Alternative to PEDOT:PSS Hole Transport Layers for Highly Efficient and Stable Polymer Solar Cells (Adv. Mater. 42/2011)

Yun, Jin‐,Mun,Yeo, Jun‐,Seok,Kim, Juhwan,Jeong, Hyung‐,Gu,Kim, Dong‐,Yu,Noh, Yong‐,Jin,Kim, Seok‐,Soon,Ku, Bon‐,Cheol,Na, Seok‐,In WILEY‐VCH Verlag 2011 Advanced Materials Vol.23 No.42

<P>Solution‐processable reduced graphene oxide as a hole‐transporting layer for highly efficient and stable organic solar cells is reported on page 4923 by Dong‐Yu Kim, Seok‐In Na, and co‐workers. Introduction of a newly reduced graphene oxide by simple solution processing into solar cells dramatically raises the cell efficiency and cell life‐time. The results will allow full use of chemically reduced graphene and will advance the realization of carbon‐based printable optoelectronic devices. </P>

우리나라 長壽者의 生活 및 意識調査에 관한 硏究 - Ⅴ. 過去의 健康疾病 및 苦痛에 대한 態度 -

최진호(Jin-Ho Choi),변재형(Jae-Hyeung Pyeun),임채환(Chae-Hwan Rhim),양종순(Jong-Soon Yang),김수현(Soo-Hyun Kim),김정한(Jeung-Han Kim),이병호(Byeong-Ho Lee),우순임(Soon-Im Woo),최선남(Sun-Nam Choe),변대석(Dae-Seok Byun),김무남(Mu-Nam 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.1 No.-

The present study was designed to be link a part of the research on the investigation on daily life and consciousness of the longevous people in Korea, and to investigate the health conditions, and the attitude on disease and suffering of longevous people in the past. 1. By the health conditions of longevous people between 40 and 60 years, ""very good"" showed the highest figure of 71.0%, followed by ""ordinary"" (21.6%). Consequently it is found that 92.6% of total longevous people surveyed maintained the good health conditions above ordinary. 2. Of the experiences of disease and/or injury after 60 years of longevous people, ""never"" showed the highest figure of 74.7%, while ""had"" showed the only 22.6% of total longevous people surveyed. 3. Of the details of disease and/or injury after 60 years of longevous people. ""digestive disease"" showed the highest figure of 32.6%. followed by ""apoplexia cerebri & hypertensions""(14.0%) and ""heart disease""(14.0%), and followed by ""respiratory disease""(12.3%). 4. Of the experiences of suffering between 40 and 60 years of longevous people, ""never"" showed 53.7% of total longevous people surveyed, while the frequency of suffering decreased in the order of ""once""(22.7%), ""2 times""(15.8%) and ""3 times""(4.7%). By the details of suffering between 40 and 60 years of longevous people. ""family life"" showed the highest figure of 85.1%, followed by ""business""(10.1%). 5. By the attitude on suffering of longevous people, ""tried to forget soon"" showed the highest figure of 54.2%, followed by ""continuous worried""(23.3%), and followed by ""not worried""(7.2%).

소아청소년기에 치수치료를 받은 제1대구치의 술전 상태 조사

이순영,이경호,노홍석,정태성,김신 大韓小兒齒科學會 2011 大韓小兒齒科學會誌 Vol.38 No.4

제1대구치는 막중한 역할을 함에도 불구하고, 청소년 이전에 건강을 상실하는 경우가 드물지 않다. 본 연구는 청소년기 이 전에 치수치료를 받게 된 제1대구치의 우식 및 수복 상태와 분포를 파악할 목적으로 시도되었다. 최근 5년간 부산대학교 치 과병원에서 치수치료를 받은 18세 이하 106명 환자의 135개 제1대구치를 대상으로 의무기록에 대한 조사를 시행하여 다음 과 같은 결과를 얻었다. 1. 평균 연령은 11.9세(남 11.5세, 여 12.5세)였고 유의한 성차를 보였으며(p<0.05), 악별로는 상악 47개, 하악 88개로 하악 치아가 더 많았다. 2. 치수 치료 전 치료 기왕력이 없는 치아는 74개, 치수 또는 수복 치료를 받은 치아는 61개였다. 그 중 재치수치료를 받게 된 경우는 22개로 치수절제술-치수절단술의 순이었으며, 단순 수복치료를 받았던 치아는 39개로 복합레진-아말감-GI- 인레이-수복물 탈락 후 미치료-열구전색 및 주조 전장관의 순이었다. 3. 병소 위치가 분류 가능한 73개의 병소 중에서는 근심면 병소가 22개, 교합면 혹은 협설면 병소 39개, 원심면 병소가 12 개를 차지하였다. In clinical dentistry, it is not difficult to meet the permanent first molars with severe coronal caries lesions in children or adolescents. The circumstances surrounding the first molars of children and adolescents are so immature and imperfect compared with those of adults. So we thought it significant to understand the status of these teeth at the moment of endodontic treatment and immediate cause of it. 106 patients with 135 permanent molars necessitating endodontic treatment in childhood and adolescence were included in this study, and the dental records and radiographs were examined. 1. The mean age was 11.9 year (male 11.5, female 12.5) and the result shows significant difference between gender(p<0.05). The mandibular teeth took more than half percentage than maxillary teeth. 2. Of 135 teeth, 45.2 percent of teeth had history of dental treatment previously and 16.3 percent of teeth showed necessity of re-endodontic treatment. 3. Of 73 teeth, 22 teeth had mesial-wall cavity causing endodontic treatment, 39 had occlusal cavity, and 12 had distal cavity.

한우 성별에 따른 등심의 육질특성 비교

최정석, 정동순, 최석현, 이상화, 김종희, 최양일 忠北大學校 農業科學硏究所 2011 農業科學硏究 Vol.27 No.4

-본문참고-

수 종의 복합레진 접착 시스템에서의 미세 누출의 비교

석충기,남동우,남순현,김영진,김현정 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

최근 자가 부식형 접착 시스템이 개발되어 법랑질 및 상아질에 모두 적용할 수 있고, 임상적 술식을 단순화 시켰다. 이 접착 시스템은 적용하기 용이하고 임상적으로도 법랑질 및 상아질에 높은 결합강도를 보인다고 보고되고 있다. 이 연구는 in vitro 상에서 복합레진 5급 와동의 법랑질 및 상아질 경계에서 전부식 처리를 동반한 one-bottle 접착시스템과 자가 부식형 접착 시스템을 사용하였을 때 미세 누출을 비교하기 위해 시행하였다. 교정적 목적으로 발치된 30개의 소구치를 무작위적으로 3개 군으로 나누었다; 1 군 (Single Bond^(�) + Filtek Z250^(�)), 2 군 (Clearfil SE Bond^(�) + Filtek Z250^(�)), 3 군 (Adper Prompt L-Pop^(�) + Filtek Z250^(�)). 표준화된 5급 와동을 각 소구치 협면, 설면에서 백악-법랑경계에 평행하게 형성하였으며, 와동의 치은측 1/2은 백악-법랑경계보다 1mm 치근단으로 연장하였다. 접착 시스템을 제조자의 지시대로 적용한 다음 복합레진을 충전하고 제조자의 지시대로 광중합하였다. 시편을 37℃ 증류수에 5일 간 보관 후 5℃±2℃ 와 55℃±2℃에서 1000회 열순환한 다음, 2% methylene blue 용액에 12시간 침잠시켰다. Isomet^(TM) (Buehler Co., Lake Bluff, IL, USA)을 사용하여 치아를 충전물 중앙에서 종절단한 후 입체 현미경하에서 25배의 배율로 색소 침투도를 평가하였다. 결과는 t-test 와 one-way ANOVA를 이용하여 통계처리 하였다. 결과는 다음과 같았다. ·실험에 사용 된 접착 시스템 중에 미세 누출을 완벽하게 방지하는 접착 시스템은 없었다. ·상아질 경계에서의 미세 누출이 법랑질 경계에서보다 통계학적으로 유의하게 더 많았다(p<0.0001). ·법랑질 경계에서 자가 부식형 접착 시스템은 전부식 처리를 동반한 one-bottle 접착 시스템과 통계학적으로 유의한 차이를 보이지 않았다. ·상아질 경계에서, 자가 부식형 접착 시스템은 전부식 처리를 동반한 one-bottle 접착 시스템과 통계학적으로 유의한 차이를 보이지 않았다. Recently, self-etching adhesive system have been developed and bonding procedures simplified into one or two steps, which are simultaneously applied to both enamel and dentin. These systems are easy to use and have the potential for good clinical success. The purpose of this study is to evaluate in vitro the microleakage on the cementum/dentin and enamel walls in composite resin restoration of Class V cavities, regarding the use of different adhesive systems. 30 human premolars were divided into 3 groups. A standardized Class Ⅴ preparation was prepared on the buccal and lingual surface of each premolar. The preparation were made parallel to the cementoenamel junctions, with the gingival half of the preparation extending 1mm apical to the cementoenamel junction. After adhesive system was applied to teeth as manufacture's recommendation, hybrid resin composite was filled in bulk into the preparation and light polymerized according to manufacturer's recommendations. Specimen were stored in distilled water at 37℃ for 5 days and thermocycled 1000 times (5℃+2℃ and 55℃±2℃), then immersed in a 2% methylene blue solution for 12 hours. After sectioning mesio distally through the restorations, the degree of dye penetration was scored under a stereomicroscope at × 25 magnification. The data were analyzed statistically using t-test and one-way ANOVA. The results were as follows: · There is no adhesive system which can prevent microleakage perfectly. · There is significant difference in microleakage between enamel margin and dentin margin (p<0.0001). · In enamel margin, self-etching primer systems did not show any significant difference comparing total-etching system. · In denin margin, self-etching primer systems did not show any significant difference comparing one-bottle adhesive system used in combination with total-etching.

설계변경의 경향 및 원인 분석을 통한 설계 품질향상 방안

석성재,김재근,이철우,홍순구,유춘번 한국품질경영학회 2000 품질혁신 Vol.1 No.1

This study is prepared to introduce design quality improvement measures by the trend and cause analysis of design changes which have been made during operations of construction project for power plant. In this study, two types of analysis tool have mainly taken for the use of the improvement measures. One tool is the trend analysis to identify which action should be taken to cut down design changes. This is also useful to monitor whether project participant's endeavour for the action taken is effective or not, to the project performance and design quality improvement. The other is the cause analysis, by using cause and effect diagram, which is useful to identify main causes of the design changes and to establish the measures to reduce recurrence of the design changes.

맹출 장애를 가진 상악 제1대구치의 외과적 노출을 이용한 치험례

석충기,남동우,김현정,김영진,남순현 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.1

치아의 맹출이란 구강내로 치아가 출현하기 전의 악골 내에서의 이동, 구강에 출현하여 교합면에 이르기까지의 이동, 그리고 교합면 도달이후의 추가적인 이동 등 모두를 포괄적으로 의미하는 용어이다. 맹출은 대부분 유전적으로 결정되며 치아가 성장 발육 과정에 따라 구강내로 맹출되는 과정은 preeruptive alveolar bone stage, alveolar bone stage와 mucosal Stage로 구분할 수 있는데, 이들 과정의 어느 단계에서도 장애가 발생하면 치아가 맹출하지 않는다. 맹출 장애의 원인으로는 치배의 부정위, 정상 맹출로의 방해, 치낭 혹은 치주인대의 손상 등이 있다. 맹출 장애 치료에는 유치발거 및 맹출 공간확보, 외과적 노출, 외과적 정위, 외과적 노출 후 견인이 있고, 이 중 외과적 노출이 가장 기본적인 술식이다. 외과적 노출은 영구치를 둘러싸는 점막, 골, 병소, 경우에 따라 치낭 등을 제거하여 개방된 맹출로를 확보하는 것이고, 형성된 맹출로는 레진관(celluloid crown)의 접착, 거타 퍼챠 혹은 산화 아연 유지놀 시멘트, 치 주 포대 등을 노출된 부위 에 충전하여 개방성을 유지하여야 한다. 외과적 노출시에는 치경부 치근의 백악질을 노출시키지 않도록 하여야 하며, 인접치아의 치주 조직이나 치근의 손상도 피 해야 한다 또한 노출 후 치아는 각화된 치은에 위치하여야 한다. 외과적 노출 중에 가해진 손상의 정도는 치아의 병리, 생리 학적 이상의 발현에 영향을 미치므로 주의하여야 한다. 본 증례들은 상악 제1대구치가 맹출 장애를 가긴 증례들이었으며, 이를 개선하기위해 위의 사항을 고려하여 외과적 노출을 시행하였고, 맹출 장애를 효과적으로 개선할 수 있었다. The eruption of permanent teeth represents the movement in the alveolar bone before appearance in oral cavity, to the occlusal plane after appearance in oral cavity, and additive mevement after reaching th the occlusal plane. Tooth eruption is mostly controlled by genetic signals. The eruption stage is divided to preeruptive alveolar stage. alveolar bone stage, mucosal stage according to the process of growth and development. If the disturbance is occured in any stage of eruption, tooth does not erupt. The cause of eruption disturbance are eclopic position of the tooth germ, obstruction of the eruption path and defects in the follicle or PDL. In the treatment of eruption disturbance, surgical procedures are commonly used. There are three kind of surgical procedure surgical exposure, surgical repositioning, surgical exposure and traction Surgical exposure is basic procedure. This involves removal of mucosa, bone, lesion that are surrounding the teeth, dental sac when necessary to maintain a patent channel between the crown and the normal eruptive path into the oral cavity. To ensure this patency, many techniques including cementation of a celluloid crown, packing with gutta-percha or zinc oxide eugenol, or a surgical pack, are used. When surgical exposure is conducted, operators should not expose any part of cervical root cement and not in jure periodontium or root of adjunct tooth. After surgical exposure, tooth should be surrounded by keratinized gingiva. There is direct relationship between the extent of development of pathophysiologic aberrations and the intensity of the manipulative injury inflicted on the tooth by surgical treatment, so operator should consider this thing. In these cases surgical exposure is conducted on Maxillary 1st milars that have a eruption disturbance and improve the eruption disturbance effectively.

농가경영성과에 따른 농업인 교육 분야별 필요도에 대한 분석

이순석,장우환 한국농업교육학회 2011 농업교육과 인적자원개발 Vol.43 No.4

이 연구는 농업경쟁력 제고의 방안으로 수행되고 있는 농업인 교육의 효과를 구명하고, 농가경영성과별로 농업인 교육 분야별 필요도의 차이를 분석하고자 하였다. 또한 농가경영성과별로 필요한 교육 분야를 제시하고자 하였다. 구체적 목적달성을 위한 분석 방법은 대응표본 t-검정, 일원분산분석 및 대응일치분석이며, 주요 연구 결과는 다음과 같다. 첫째, 농업교육과정에 대한 농가들의 교육 참여 이후 만족도 점수가 참여 이전 기대 점수보다 더 높아 농업인 교육 사업이 효과가 있는 것으로 분석되었다. 둘째, 농업인의 교육 필요도를 농가경영성과의 주요 지표인 소득과 부채를 기준으로 구분해본 결과, 경영능력배양과 농외소득증대 교육 필요도에서 공통적인 차별성이 존재하였다. 셋째, 대응일치분석을 통해 지각도를 그려본 결과, 농가 소득수준과 부채수준에 따라서 교육 분야에 대한 필요도가 다르게 나타났다. 이러한 분석 결과는 교육과정을 개발함에 있어서 농가들의 소득수준과 부채수준도 사전에 충분히 고려할 필요가 있다는 것을 제시해주고 있다. 앞으로 농업인 교육은 농가경영성과에 따른 수요자 맞춤형 교육과정을 통해 농업지식․기술 및 경영 능력에 대한 질적 변화를 기대할 수 있고, 더 나아가서 농업 전반의 경쟁력 제고에 긍정적인 영향을 미칠 것으로 판단된다. This study is to clear up the effect of farmer education for upgrade in the competitiveness of agriculture and to analyze the differences of necessity in farmer education sector by farm management result. Additionally, it proposes farmer education sector that farmers need by farm management result. Analysis methods used for this study are paired t-test, one-way ANOVA test and correspondence analysis. Major results are as follows. First, it shows that the effect of farmer education was over the expectation because satisfaction score was higher when farmer finished farmer education course compared to expectation score before participation in farmer education course. Second, there are common differences in necessity of farmer education course for the enhancement of management ability and the increase of nonfarm income in results that necessity of farmer education course was analyzed by income and debt level. Third, according to perceptual map through correspondence analysis, there are differences in necessity of farmer education course by income and debt level. It suggests that income and debt level have to be considered deeply in developing farm education course in advance. From now on, Farmer education course can make a qualitative change on the agricultural knowledge, techniques and management abilities by customized education course, effect positively on strengthening the competitiveness of agriculture by extension.