서초동(서울시 서초구)의 거미상

김주필(Joo Pil Kim),정혜리(Hye ri Jeong),김대희(Dae Hee Kim),박동우(Dong Woo Park),서재웅(Jae Woong Seo),이현우(Hyun woo Lee) 한국거미연구소 2017 한국거미 Vol.33 No.1

2016년 3월 31일부터 7월 31일까지 서울특별시 서초구 서초동에 위치한 서울고등학교 교정 일대를 서울고등학교 환경생물부 부원들이 채집 조사한 결과 20과 43속 53종의 거미가 조사 연구되어 이에 보고하는 바이다. From March 31st to July 31st in 2016, members of an environmental biology club at Seoul High School located in Seocho-gu, Seoul, Dae-Hee Kim, Dong-Woo Park, Jae-Woong Seo and Hyun-woo Lee, collected 20 families 43 genera 53 species of spiders and report the result of the study here.

제통단이 퇴행성 슬관절염 환자의 삶의 질에 미치는 영향

서병관,류성룡,강중원,우현수,이상훈,이재동,최도영,김건식,이두익,이윤호 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objectives : to evaluate the effects of Jetongdan, the newly developed herbal medicine, on the quality of life in patients with osteoarthritis of knee Methods : Placebo-controlled, randomized clinical trial on the 80 patients with osteoarthritis of the knee was fulfilled. After enrollment, they took medication as they enrolled. And they were asked to answer the questionnaires (Korean Health Assessment Questionnaire (KHAQ), Lequesne's functional index (LF1), visual analogue scale (VAS)) and analysed with the erythrocyte sedimentation rate (ESR) at baseline, after 4 weeks and 8 weeks of medication. Results : Total KHAQ score, some categories of KHAQ like hygiene, activities were significantly improved after 8 weeks of medication. And the change of the KHAQ score was significantly correlated with the change of VAS. But LFI, VAS, ESR level was not significantly improved, and it was considered because of the short medication period and small size of study population. Conclusion : In conclusion, Jetongdan could improve the health-related quality of life in patients with osteoarthritis of knee. Further study in the large population, in long period were recommended.

Helicobacter pylori 양성인 소화성 궤양 및 위염 환자에서 Helicobacter pylori 제균에 대한 판토프라졸 포함 삼제 요법의 임상효과 및 내약성에 대한 연구

서영호,이완식,주영은,김현수,최성규,유종선,김행재,서순팔,김세종 최신의학사 2000 最新醫學 Vol.43 No.11-12

工業化過程의 社會的 意義 : 産業革命을 中心으로

서승록,신현재 대구대학교 (한사대학) 산업기술연구소 1982 産業技術硏究 Vol.2 No.1

Modern industry has been established by the factory system industry, depending upon the industrial revolution which once caused the worldwide unemployment but has brought wealth and prosperity to the whole-world-peoples. The industrialization of the factory system has resulted; first, the posibility of mass production through the technical specialization, second, the reduction of working hours and efforts by the mechnization, third, the rationalization of production with the scientific method, fourth, the establishment of the foundation of modern capitalism. Therefore, the influences of the industrial revolution to the society through the industrialization process should be well reilluminated once more in all its affirmative aspects.

내용기반 이미지 검색 시스템에 대한 고찰과 설계 요건에 대한 연구

서재현,서상환,김흥식 인제대학교기초과학연구소 1998 자연과학 Vol.2 No.-

멀티미디어 데이터베이스의 내용기반 검색은 색인 기술을 요구한다. 전통적인 데이터베이스와는 달리 데이터 항목은 기본이 되는 데이터 타입들의 속성의 집합으로 나타내어지는데, 멀티미디어 데이터베이스에 있는 멀티미디어 객체는 특징들의 수집에 의해 표현되고, 객체 내용의 유사성은 문맥과 참조의 프레임에 의존하며, 객체의 특징은 다중양식 특징 측정에 의해 특성화된다. 내용기반 이미지 검색을 단계별로 3가지 큰 작업으로 나누어 보면 해당 이미지를 가장 정확하게 특징들을 추출하는 단계와 그 추출된 특징을 효과적이고 능률적으로 저장, 검색을 지원하는 단계와 다시 이미지의 유사성을 검출해 내는 단계로 요약된다. 본 논문에서는 기존에 연구된 이미지 특징 추출들을 연구 분석하고 이미지 내용 기반 검색에 적합한 다양한 특징 추출과 유사도 검색에서의 문제점과 이에 대한 적합한 설계요건에 대해 제시한다. Content-based retrieval of multimedia database calls for content-based indexing techniques. Different from conventional databases, where data items are represented by a set of attributes of elementary data types, multimedia objects in multimedia databases are represented by a collection of features; similarity of object contents depends on context ad frame of reference; and features of objects are characterized by multimodal feature measures. Try to divide content-based images retrieval systems into three large operation, it is consist of the following three phases; extracting features that can represent images the most exactly, storing the extracted features effectively and efficiently and support retrieval, detect similarity of images. In this paper we first investigated and analyse the existing image feature extraction methods and various features extraction that adequate for content-based image retrieval and problem of similarity retrieval, we also present design of suitable demand.

자연정화공법에 의한 하수처리장에서 최적 여재 선정

서동철,이홍재,조주식,박현건,김형갑,허종수 한국환경농학회 2003 한국환경농학회지 Vol.22 No.1

농어촌 등에서 소규모로 발생하는 하수를 환경친화적이고 높은 하수처리효율을 유지하면서 하수처리장의 장기간 사용을 위한 최적의 여재를 선정하기 위하며 자연정화공법을 이용한 소형하수처리장치를 호기성조 및 혐기성조로 구분하여 시공한 다음, 하수처리량 및 여재 입경별 수처리 효율을 조사하였고, 호기성조와 혐기성조에서 여재 입경별 하수의 투수속도를 조사한 결과는 다음과 같다. 호기성조 처리수 및 방류수중의 pH 및 EC는 여제입경에 따라서 별 차이가 없었고, 용존산소는 호기성조를 동과한 호기성조 처리수의 용존산소는 큰 폭으로 증가하였으나 혐기성조를 통과한 방류수의 용존산소는 호기성조 처리수에 비해 약간 감소하여 여재입경 및 하수처리량에 따라서 별 차이가 없이 약 2.4~5.1 mg/L정도이었다. BOD,000 및 탁도 처리율은 여재 대(4~10 mm)를 사용했을 경우에도 호기성조 처리수에서 BOD 처리율은 약 91%이상, COD 처리율은 73%이상, 탁도 처리율은 83%이상이었으며, 이들 처리율은 여재입경이 작을수록 증가하였고 모든 조건에서 방류수중의 BOD 처리율은 98%이상, COD 처리율은 91%이상, 탁도 처리율은 98%이상이었다. 여재입경별 총 질소 및 총 인 처리율은 여재입경이 작을수록 약간 증가하였고, 모든 조건에서 방류수중의 총 질소 처리율은 약 45~59%, 총 인 처리율은 약 80~96% 정도이었다. 하수 처리율 및 투수속도를 고려해 볼 때 하수처리장 호기성조의 최적입경은 2~4 mm정도 혐기성조의 최적입경은 0.1~4 mm정도가 적절한 젓으로 사료되었다. 따라서 이러한 조건을 자연정화공법을 이용한 하수처리장에 적용하면 높은 하수처리효율을 유지하면서 하수처리장의 공극폐쇄현상이 일어나지 않아 장기간 운전할 수 있을 것으로 판단된다. An investigation was carried out to evaluate the effects of pebble size on the small-scale sewage treatment apparatus by natural purification method that consisted of aerobic and anaerobic plot pH and EC in both plots varied minimally regardless of pebble size. DO in aerobic plot increased as the pebble size decreased. That in the anaerobic plot was slightly less in comparison with that of the aerobic plot, but varied minimally, 2.4~5.1 mg/L regardless of pebble size. Under all experimental conditions, removals of BOD, COD and turbidity in anaerobic plot were more than 98, 91 and respectively. Removals of T-N and T-P increased as pebble size decreased. Under all experimental conditions, removals of T-N and T-P in anaerobic plot were about 45~59 and 80~96%, respectively. Judging from the above results, it should be considered that the optimum pebble size and pebble permeability in both plot was 2~4 mm and 0.1~4 mm, respectively.

Evaluating Corrosion Resistance of Additive-Manufactured Ti–6Al–4V Using Electrochemical Critical Localized Corrosion Temperature

Jae‑Bong Lee,Dong‑il Seo,Hyun Young Chang 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.1

A new concept to evaluate the localized corrosion resistance of stacked Ti alloys such as additive-manufactured (AM)Ti–6Al–4V alloy is proposed. Crevice corrosion of subtractive-manufactured (SM) Ti–6Al–4V occurred on the surfacebeneath the crevice former, whereas localized corrosion of the AM alloy occurred in any vulnerable site irrespective of thecrevice assembly. The electrochemical critical localized corrosion temperature (E-CLCT) was measured to evaluate theresistance of AM Ti–6Al–4V alloys to localized corrosion. The results showed that the localized corrosion of AM Ti–6Al–4V was attributable to the anisotropy and microstructure that resulted from rapid cooling, which were completely differentfrom the anisotropy and microstructure of SM Ti–6Al–4V. The optimum applied potential of AM Ti–6Al–4V in 25 wt%NaCl aqueous solution was deduced. The E-CLCT provides a useful criterion for determining the resistance of AM Ti alloysto localized corrosion and for comparing their resistances.

가토 외고정 모델을 이용한 치밀체형 세라믹스의 골결합능 평가

이재협,이동호,이재학,공현식,안영준,류현승,서준혁,홍국선,김환,장봉순,이춘기 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

6LoWPAN에서 단편화 관리 기법

한재일,서현곤 한라대학교 2009 論文集 Vol.12 No.-

6LoWPAN is IPv6 packets transmission technology at Sensor network over the IEEE 802.15.4 Standard MAC and Physical layer Adaptation layer between IP layer and MAC layer performs fragmentation and reassembly of packet for transmit IPv6 packets RFC4944 IETF 6LoWPAN WG standard document define packet fragmentation and reassembly In this paper we propose the IRM(Immediate Retransmission Method) and SRM(Selective Retransmission Method) to manage packet fragmentation and reassembly at 6LoWPAN Each time destination receives a fragmented packet it sends Ack message to the source node on IRM However on SRM the destination node receives all fragmented packet it sends Ack message or Nak message to the source node In this case Nak message include the dropped packet number To compare the performance of the proposed schemes we develop a simulator using C^(++) The result of simulation shows the proposed schemes provider better performance than RFC4944 standard scheme

공동탐사 시스템의 비교에 관한 연구

이호재,조병서,허웅,김현중 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In this study, we report the characteristics of three Kinds of Radar Exploration Systems, which are used in geological cavity detection, for effective use. The systems are RAMAC, PEMSS and KAIST CW. We repeated measurements each system for same geological model. The AMAC System has a unique capability in finding fracture zones from the reflected waves, and represents the cavity as a hyperbola because the cavity responds as a point source. In the PEMSS systems the relative velocity and attenuation of the electromagnetic wave which varies by geological medium represents geological structures. The main merit of the PEMSS system is cavity localization. The location of the cavity is determined the depths of cavity signals in each offset data. The KAIST CW system also detects a cavity from the attenuation pattern of continuous waves. This uses the phenomenon of 180'phase change of the wave when it propagates the cavity, producing the high attenuation at that point. Our study shows that the RAMAC is suitable in cavity scanning, the PEMSS is adaptive in precise geology exploration, and KAIST CW is best in cavity detection.