Electropulsing Treatment on Enhancement of Electrical Conductivity of Screen-Printed Ag Wire

Ju‑Won Park,Howook Choi,Hwangsun Kim,Simoon Sung,Hye‑Jin Jeong,Il Kim,Jaeseok Gong,Sung‑Tae Hong,Heung Nam Han 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.5

The effect of high electric current density on the sintering of Ag wires manufactured by screen printing is evaluated throughelectrical resistivity analysis and microstructure observation. Different forms (continuous and pulsed) of electric currentwith different current densities are applied to the specimens. Conventional heat treatment is also performed as a controlgroup to examine the athermal effect of electropulsing treatment. Compared to the conventional heat treatment, the resistivityis reduced more under the electropulsing treatment with continuous current for the same temperature and treatment time.Also, the process time of electropulsing treatment can be reduced by applying a pulse form of high density current insteadof continuous current without losing the benefit of enhanced reduction of resistivity. The microstructural observationsobtained from high angle annular dark field scanning transmission electron microscope and a digital precession instrumentclearly show that necking connecting the crystals is formed more firmly under electric current. In addition, the temperaturechange of Ag wire and substrate is calculated according to the change of the resistivity when the electric current is appliedto confirm the reliability.

월악산국립공원의 곤충다양성에 관한 연구 : 노린재목, 딱정벌레목, 나비목

박성준(Seong-Joon Park),전용락(Yong-Lak Jeon),홍의정(Eui-Jung Hong),윤주창(Ju-Chang Yun),박서경(Seo-Kyoung Park),김병진(Byung-Jin Kim) 국립공원연구원 2010 국립공원연구지 Vol.1 No.3

본 연구는 2007년부터 2009년까지 3년 동안 월악산 모니터링 조사 지점과 동일지구에 대해 정기적인 주간조사를 통해 주간곤충류(노린재목, 딱정벌레목, 나비목)의 종목록을 확보 하여, 월악산국립공원의 생태계에 자연적 혹은 인위적으로 변화된 내용을 측정하여 곤충자원의 체계적인 관리를 위한 자료를 제공하고자 실시되었다. 본 조사기간 동안 채집 확인된 주간곤충류는 65과 404종(노린재목 21과 86종, 딱정벌레목 38과 244종, 나비목 6과 74종)이 조사되었다. 따라서 문헌조사를 포함한 결과 월악산국립공원에 서식하는 것으로 확인된 주간곤충류는 멸종위기야생동물 2종, 고유종 6종, 국외반출승인대상종 10종과 특정종 50종을 포함하여 총 72과 609종(딱정벌레목 44과 368종, 노린재목 22과 126종, 나비목 6과 115종)으로 나타났다. 아울러 조사지점별 분석결과 S3에서 종다양성이 가장 높게 나타났으며, S10은 다른 조사지점과 다르게 종다양성이 현저하게 떨어지는 것으로 나타났다. 각 조사기간별우점종으로는 2007년과 2009년도에 넉점박이송장벌레, 2008년도에는 더듬이긴노린재로 나타났다. This study were conducted for three years from 2007 to 2009 and at the same points as monitoring surveys, through regular surveys insects (Hemiptera, Coleoptera, Lepidoptera) to obtain the list, to measure and assess Woraksan National Park ecosystem’s natural or artificial change, to provide data for systematic management of the contents of insects. As a result of all the collections were examined, 404 species of 65 family under 3 order were identified. Therefore, the species composition of insect over each result from Woraksan National Park’s was a total of 3 orders, 72 families, 609 species including 2 Endangered species, 6 Endermic species, 10 Management of exotic species and 50 Designated species; 368 species of family Coleoptera which is the highest, 126 species of family Hemiptera and 115 species of family Lepidoptera. Site 3 had the highest indices diversity. In contrast, Site 10 indices diversity, different from the other survey points, were significantly low. In each survey period, dominant species included Nicrophorus quadripunctatus in 2007 and 2009. In 2008, dominant species was Pachygrontha antennata.

월악산국립공원의 곤충다양성에 관한 연구 - 노린재목, 딱정벌레목, 나비목 -

박성준(Seong-Joon Park),전용락(Yong-Lak Jeon),홍의정(Eui-Jung Hong),윤주창(Ju-Chang Yun),박서경(Seo-Kyoung Park),김병진(Byung-Jin Kim) 국립공원연구원 2010 국립공원연구지 Vol.1 No.4

본 연구는 2007년부터 2009년까지 3년 동안 월악산 모니터링 조사 지점과 동일지구에 대해 정기적인 주 간조사를 통해 주간곤충류(노린재목, 딱정벌레목, 나비목)의 종목록을 확보 하여, 월악산국립공원의 생태계에 자연적 혹은 인위적으로 변화된 내용을 측정하여 곤충자원의 체계적인 관리를 위한 자료를 제공하고자 실시되었다. 본 조 사기간 동안 채집 확인된 주간곤충류는 65과 404종(노린재목 21과 86종, 딱정벌레목 38과 244종, 나비목 6과 74종) 이 조사되었다. 따라서 문헌조사를 포함한 결과 월악산국립공원에 서식하는 것으로 확인된 주간곤충류는 멸종위기야 생동물 2종, 고유종 6종, 국외반출승인대상종 10종과 특정종 50종을 포함하여 총 72과 609종(딱정벌레목 44과 368 종, 노린재목 22과 126종, 나비목 6과 115종)으로 나타났다. 아울러 조사지점별 분석결과 S3에서 종다양성이 가장 높게 나타났으며, S10은 다른 조사지점과 다르게 종다양성이 현저하게 떨어지는 것으로 나타났다. 각 조사기간별 우점종으로는 2007년과 2009년도에 넉점박이송장벌레, 2008년도에는 더듬이긴노린재로 나타났다. This study were conducted for three years from 2007 to 2009 and at the same points as monitoring surveys, through regular surveys insects (Hemiptera, Coleoptera, Lepidoptera) to obtain the list, to measure and assess  Woraksan National Park ecosystem’s natural or artificial change, to provide data for systematic management of the contents of insects. As a result of all the collections were examined, 404 species of 65 family under 3 order were identified. Therefore, the species composition of insect over each result from Woraksan National Park’s was a total of 3 orders,  72 families, 609 species including 2 Endangered species, 6 Endermic species, 10 Management of exotic species and 50 Designated species; 368 species of family Coleoptera which is the highest, 126 species of family Hemiptera and 115 species of family Lepidoptera. Site 3 had the highest indices diversity. In contrast, Site 10 indices diversity, different  from the other survey points, were significantly low. In each survey period, dominant species included Nicrophorus quadripunctatus in 2007 and 2009. In 2008, dominant species was Pachygrontha antennata.

영유아 보육시설의 조리실 시설 현황 조사 및 조리실 시설 설계 기준안 개발

박영주,곽동경,강영재,정홍관 대한영양사협회 2003 대한영양사협회 학술지 Vol.9 No.3

The purposes of this study were to assess the child care centers' foodservice facility, and to develop the kitchen facility model based on the general sanitation standards and guidelines in order to provide basic information for a plan review to build or renovate child care centers' foodservice facility. The scopes of the study include : 1) field assessment of the foodservice management practices and facilities in 8 public child care centers, and 2 private child care centers which they are subsidized from the government as public child care centers, 2) development of child care centers' kitchen facility model based on the General Sanitation Standards and Guidelines. The results of this study can be summarized as follows : 1. Field Assessment of the Child Care Centers' Foodservice Facility Average number of children in child care centers was 78.0±24.20, the average space of kitchen was 15.13±4.25(㎡), Especially, the average space of kitchen was 18.49±4.35(㎡) with enrollment capacity of 90∼120 children in child care centers. The inventory level of most foods was relatively low except rice and kimchi. Kitchen facilities and equipments were similar to those of home kitchen and did not meet the standards of institutional practice. Therefore, the director in child care centers should recognize the importance of the sanitation management and pay more attention to the renovation of foodservice facilities as well as sanitation management practices. 2. Development of the Kitchen Facility Model based on the General Sanitation Standards and Guidelines The kitchen facility plan model with enrollment capacity of 100 children was developed based on the results of field assessment and literature review. Suggested kitchen space was 34.16㎡(6,100mm×5,600mm). This space was bigger than the results of field survey or precedent study, considered appropriate to implement the general sanitation standards. The main feature of the developed kitchen facility plan and model was product flow in one direction from the arrival of the raw material to the finished product in order to prevent cross contamination and to improve working efficiency.

웹 카메라 서버용 JPEG2000의 EBCOT 설계에 관한 연구

박주현,김영철,홍성훈 전남대학교 전자통신기술연구소 2001 전자통신기술논문지 Vol.4 No.1

In this paper, an EBCOT in JPEG2000 for application to a web camera is designed in VLSI and implemented into a chip. The designed EBCOT extracts contexts from mutual relevance of neighborhood pixels values and previous bit-plane values in a same subband. The contexts are compressed using entropy coding scheme. Two IP modules, a context extracting module and an arithmetic coding module, are modeled in VHDL and synthesised using Synopsys tool, and fabricated using Hyun-dai 0.35㎛ CMOS process.

꽃꽂이시 절화조합이 장미의 절화수명과 미생물 증식에 미치는 영향

박윤점,정주연,장홍기,허북구 한국화훼연구회 2001 화훼연구 Vol.9 No.2

Various combinations of cut rose and other cut flowers were accomplished to provide basic data for vase life extension of cut rose. The vase life of cut rose combined with other cut flowers was as follows ;rose (8 days) > rose + gladiolus (6 days) > rose + calla (4 days) > rose + chrysanthemum (4 days) > rose + carnation (3 days) > rose + gerbera (2 days). The vase solution of cut rose without other cut flowers had the lowest concentration (1.2×105 CFU/mL) of bacterial cells. On the other hand, The vase solution of cut rose with gerbera had the highest concentration (9.3×106 CFU/mL) of bacterial cells. From the above results, it is concluded that vase life of cut rose is extended by reducing the bacterial cells in the vase solution though the proper combination with effective cut flowers.

남북 스포츠 교류의 사회문화적 의의에 관한 연구

박종진, 민주홍 忠北大學校 平生體育硏究所 2014 平生體育硏究所 論文集 Vol.26 No.-

The political policies between the two Koreas since the Korean War have resulted in exclusive senses and this aspect affected to politics, society, education and so forth over the last half century or so. Those affected exclusiveness recently appears in sport too, therefore the sports exchanges between the two nations has now almost disappeared from the scene under the modern and present political conflicts. As witnessed in the case of Germany, sports exchanges can play enormously important role to achieve unification of the two Koreas. It was the research intention to understand the transformation of sports policies in two Koreas and to explore changes of sports exchange since the Korean War. The main purpose of the study, therefore is to find out appropriate approaches to the sports exchange towards the two divided Koreas. An inter-subjective discussion has been made analyzing primary and secondary sources. The research outcome are as follows. Firstly, the President Chung Hee Park attempted sport exchange with the North intending nationalistic oriented policy and it was aimed to focus on elites' intensive cultivation considering winning always against the North. This could not accelerated active exchanges moreover, it in fact hindered the exchanges with the North. Secondly, the President Doo Hwan Jeon announced 'national conciliation and democratic unification' and he intended to promote unification policy during his reign. However, the military based government had a limit to continue the policy towards the unification through sport. Moreover, the international politics during the early 80s was in the Cold War and the Korean situation was influenced. Thirdly, during the reign of Dae-jung Kim, his intention towards the unification was often criticized due to various concerns including the misuses of supported material. However, his Sunshine Policy to embrace the North in fact contributed to an active sports exchange between the two Koreas. Various types of competitions and sports events were taken place constantly promoting the national homogeneity. Overall research discussion and result may be able to contribute to finding sound methods to conciliate and to express the Korean national homogeneity in the global society. Therefore relevant researches needs to be carried out for an appropriate way of sports exchange and it may be expected that the sports exchanges will be setting a strong stone for the democratic unification in the near future.

28세 여성에서 Epinephrine 국소 주사 후 발생한 스트레스성 심근병증 1예

임주견,곽성동,박재영,천재홍,최성열,차태준,이준상 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

Stress induced cardiomyopathy is characterized by transient left ventricular dysfunction with typical regional wall motion abnormality of basal segment hyperkinesia and apical hypokinesia after physical or psychological stress. Stress induced cardiomyopathy mimics acute myocardial infarction but coronary angiography shows normal and usually recovers rapidly. Stress induced cardiomyopathy appears to occur almost exclusively in old females. Only a few cases have been reported in younger women but not yet in korea. The pathogenesis is not well known. Currently, it is thought that catecholamine may play important role. Especially, epinephrine may be most important catecholamine in the pathogenesis of steress induced cardiomyopathy. We report a case of stress induced cardiomyopathy occurred in young female after local epinephrine injection for hemostasis during tonsillectomy. 스트레스성 심근병증은 고령의 여성에서 주로 발생하며 카테콜라민 중 특히 epinephrine이 병리기전의 주요한 원인의 하나로 생각되어지고 있다. 저자들은 28세의 젊은 여성에서 편도절제술 도중 지혈을 목적으로 epinephrine을 국소 주사한 후 발생한 스트레스성 심근병증 1예를 경험하여 문헌 고찰과 함께 보고하는 바이다.

골격성 Ⅲ급 부정교합 환자에서 양악 수술후 연조직 변화에 대한 연구

박홍주,최홍란 전남대학교 치과대학 1998 전남치대논문집 Vol.10 No.1

The purpose of this study was to assess the soft tissue changes using twenty skeletal class Ⅲ malocclusion patients who treated with bimaxillary surgery for the correction of dentofacial deformities. Patients were devided into two groups. One was impaction and advancement of maxilla with mandibular set-back (Group 1), the other was downward and advancement of maxilla with mandibular set-back (Group 2). Preoperative and postoperative one year cephalometric data were analyzed and compared. Results obtained were as follows : 1. The ratio of horizontal changes of soft tissue to hard tissue at Nt to ANS, Ls to UI, Li to LI, sPog to Pog were 1:0.60, 1:0.79, 1:0.47, 1:0.63 in group 1 respectively, and 1:0.59, 1:0.48, 1:0.83 1:1.09 in group 2 respectively. There were highly predictable in upper lip, lower lip, and chin. 2. The ratio of vertical changes of soft tissue to hard tissue at Nt to ANS, Li to LI were 1:0.72, 1:0.06 in group 1, and others showed no statistically significant differences. 3. The ratio of horizontal changes of Ls to hard tissue movements at LI(h) was 1:-0.82 in group 1 and at UI(h), LI(h) were 1:0.48, 1:0.01 in group 2. These ratios of group 1 were greater than those of in group 2. 4. The direction of horizontal change of Li was the same as that of hard tissue change. The ratio of horizontal changes of Li to LI was 1:0.47 in group 1 and others showed no statistically significant difference. 5. The changes of upper lip thickness and length were -1.6 mm, -1.4 mm in group 1, and -1 mm, -2.7 mm in group 2. 6. The ratios of thickness of upper lip to ANS, Ul, LI were 1:-0.83, 1:-0.37, 1:0.11 in group 1. There was similar trend in group 2, but there were no statistically significant difference. These results suggest that prediction of changes in soft tissue of upper lip, lower lip, and chin were 79%, 47%,and 63% in group 1, and 48%, 83%, and 109% in group 2 after bimaxillary surgery. There was a tendency of decrease in thickness and increase in length of the upper lip.

핀의 최적 설계를 위한 구조화 표본추출 적용 연구

박홍준,김정호,전형주 순천대학교 2000 순천대학교 자연과학논문집 Vol.19 No.1

The Taguchi method by orthogonal array, one of the structured sampling methods, has many advantages which are row cost and time saving for experiments and researches. But this method has applied limited area especially about mechanical problems. So, we experimented whether the structured sampling is useful to apply optimal design of mechanical elements. First, we made a mechanical problem to determine optimal parameters of a pin with a hole. The second, we calculated combination of optimal parameters by simulation. At the same time, we seeked optimal combination by structured sampling using orthogonal array and ANOVA(Analysis of Variance). The last, we compared these two results. The experimental result have shown that the structured sampling method seeked optimal parameters exactly. So, we see some possibility in this application.