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유종수,Yu,Jong-Su 한국조류학회(藻類) 2003 ALGAE Vol.18 No.4
Algal flora and community structure of benthic marine algae in the subtidal zone, Yeongil Bay area were studied. The number of algal species in the quadrats were identified totally 78: 2 Cyanophyta, 10 Chlorophyta, 19 Phaeophyta, and 47 Rhodophyta. The dominant species based on biomass were Sargassum hornerii, Undaria pinnatifida, and Sargassum thunbergii. Vertical distribution was clear by the representative algae such as, Undaria pinnatifida, Sargassum thunbergii, Sargassum horneri, Corallina spp. in the upper subtidal zone, Undaria pinnatifida, Sargassum horneri, Caulerpa okamurae in the middle zone, and Dictyopteris divaricata in the lower zone.
Ecological Study of the Marine Algal Community at the Coast of Taean Thermal Power Plant, Korea
유종수,김영환,Yu, Jong-Su,Kim, Yeong-Hwan The Korean Society of Phycology 2003 ALGAE Vol.18 No.4
The community structure of benthic marine algae was investigated at Taean Thermal Power Plant and other places around Taean Peninsula, the west coast of Korea. Total of 100 species including 3 Cyanophyta, 14 Chlorophyta, 18 Phaeophyta, and 65 Rhodophyta were identified. The number of species was highest with 78 species at the Power Plant intake, followed by 61 at the discharge, 56 at Bunjeondo, and 50 at Maoe. It was noteworthy that a subtropical species Caulerpa okamurae was collected at the intake in autumn and it was the first observation in the west coast of Korea. The pattern of vertical algal distribution showed Gloiopeltis furcata occurred in the upper intertidal zone, Sargassum thunbergii and Corallina spp. in the middle and lower zone and Enteromorpha spp. in the lower middle zone. These were all dominant species except for Enteromopha spp., which was subdominant species. Other subdominant species were Chondrus ocellatus and Neorhodomela aculeata. The average diversity indices were between 0.70 and 1.20 at each area based on their dry weight. The similarity index was 0.79 between the algal flora of this study and that of 1987, indicating that the condition of the benthic environment remained unchanged since then. This area maintained its environmental quality, so the algal community remained same with similar structure. This study area seemed a suitable place for long term monitoring of the benthic environment where industrial facilities such as a power plant might affect the benthic algal community.
유종수 ( Jong Su Yu ),이성윤 ( Seong Yun Lee ),나희영 ( Hee Yeong Na ),안태정 ( Tae Jung Ahn ),김현경 ( Hyun Kyoung Kim ) 한국고무학회 2012 엘라스토머 및 콤포지트 Vol.47 No.4
최근 들어 광, 온도, pH, 전기, 자성, 압력 등과 같은 외부 환경의 작은 변화에도 반응하여 모양/부피가 변하거나 기계적, 광학적, 전기적, 화학적 특성 등이 가역적으로 바뀌는 스마트 소재에 대한 관심이 높아지고 있다. 이러한 스마트 소재들 중 광조사에 의해 소재의 다양한 특성을 가역적으로 제어할 수 있는 광응답 스마트 소재가 많은 관심을 받고 있다. 본 논문에서는 광에너지를 받아 기계적 에너지로 바로 전환되어 인공근육, 모터 등과 같은 액츄에이터 기능을 할 수 있는 광구동형 스마트 고분자 소재들에 대해 소개하고자 한다. 특히, 광구동형 스마트 고분자 소재중에서도 마이크로와 매크로 스케일 변형이 가능한 아조벤젠을 함유한 비결정성 고분자, 액정 고분자, 자기 조립형 초분자에 대한 다양한 연구들에 대해 설명하고자 한다. Control of shape/volume, mechanical, optical, electrical, and chemical switching of materials by external stimuli such as light, temperature, pH, electric field, and pressure has attracted great attention. Among these materials, photo-responsive materials containing photochromic compounds such as azobenzene, spiropyran, and cinnamic acid groups have been the subject of intense interest in recent years. In this review, we describe the recent progress in the area of azobenzene containing polymer materials that can convert light energy into mechanical energy directly. Especially we focus our attention on light-driven actuators such as artificial muscle, motor, and valve. We summarize the photomechanical effects in liquid crystal elastomer, amorphous polymer, monolayer, and supramolecules containing azobenzene, respectively.
A Study of CIGS Coated Thin-Film Layer using Doctor Blade Process
유종수(Yu, Jong-Su),윤성만(Yoon, Seong Man),김도진(Kim, Do-Jin),조정대(Jo, Jeongdai) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Recently, printing and coating technologies application fields have been expanded to the energy field such as solar cell. One of the main reasons, why many researchers have been interested in printing technology as a manufacturing method, is the reduction of manufacturing cost. In this paper, We fabricated CIGS solar cell thin film layer by doctor blade methods using synthesis of CIS precursor nanoparticles ink on molybdenum (Mo) coated soda-lime glass substrate. Synthesis CIS precursor nanoparticles ink fabrication was mixed Cu, In, Se powder and Ethylenediamine, using microwave and centrifuging. Using multi coating process as we could easily fabrication a fine flatness CIS thin-film layer (0.7{sim}1.35{mu}m), and reduce a manufacture cost and process steps. Also if we use printing and coating method and solution process in each layer of CIGS solar cell (electrode, buffer), it is possible to fabricate all printed thin-film solar cell.
윤성만,유종수,조정대,김광영,강정식,Yun, Seong-Man,Yu, Jong-Su,Jo, Jeong-Dae,Kim, Gwang-Yeong,Gang, Jeong-Sik 재료연구소 2010 機械와 材料 Vol.22 No.3
디스플레이의 기술 발달에 따라 전자소재용 기능성 필름이 각광받고 있다. 용도에 따라 제작 방법도 다양하고 생산 방식에도 차이가 있지만, 제조 기간이나 비용이 많이 소모되어 절감하려는 노력이 필요하다. 보안필름은 기능성 필름의 한 종류로서, 제조 방법에는 여러 가지가 있을 수 있으나 저가의 대량생산을 위해 최근에는 인쇄기법을 이용해 보안필름의 원리에 부합하는 필름을 제조하려는 시도가 이루어지고 있다. 따라서 본 원고에서는 인쇄기법 기반으로 안료 및 감광필름을 이용해 보안필름을 제조한 경우를 통하여 새로운 보안필름 제조방법에 대해 접근 하고자 한다.
해중림의 구조와 기능 -1. 통영산 외톨개모자반(MYAGROPSIS MYAGROIDES) 개체군의 연령과 생장-
김남길,유종수,Kim,Nam-Gil,Yu,Jong-Su 한국조류학회(藻類) 2003 ALGAE Vol.18 No.4
The age growth pattern of Myagropsis mygroides (Cystoseiraceae, Phaeophyta)population were investigated at Tongyeong (128$^{\circ}$ 25' E and 34$^{\circ}$ 45' N) in South coast of Korea, from September 1998 to August 1999. Water temperatures varied from 7.7${^{\circ}C}$ to 26${^{\circ}C}$ during the survey period. Distinct seasonal changes were found in the plant legth and wet weight of plant, and their maximum length and wet weight were attained 70.5(${\pm}$ 20.9) cm and 191.8(${\pm}$ 135.0) g during April and May. The growth patterns were divided into four periods of slow growth (September-November), fast growth (December-February), maturing growth (March-May) and declining period (June-August). The Tongyeong population of M. myagroides was dominated by less than three-year old small plants with slower growth rates, shorter plant length, lighter plant weight than those of other locations in Korea.
한강하류의 환경학적 연구 V.식물플랑크톤 군집 대발생의 특징
정승원,이진환,유종수,Jeong, Seung-Won,Lee, Jin-Hwan,Yu, Jong-Su 한국조류학회(藻類) 2003 ALGAE Vol.18 No.4
Ecological characteristics of phytoplankton communities were investigated biweekly at 6 stations from Feb. 2001 to Feb. 2002 at the lower part of the Han River. During the study, a total of 267 taxa which were composed of 114 green algae, 104 diatoms, 22 blue-green algae, 13 chrysophytes and 2 dinoflagellates were observed. The standing crops of phytoplankton communities were ranged from 1.30 ${\times}10^6$ cells ${\cdot}l^{-1}$ to 37.47 ${\times}10^6$ cells ${\cdot}l^{-1}$. The dominant species were 11 taxa including Pediastrum duplex, Scenedesmus quadricauda in green algae, Osillatoria limosa, Microcystis aeruginosa, Merisomorpedia sp., Phormidium sp. in blue-green algae, and Asterionella gracillima, Aulacoseira granulata, Fragilaria crotonensis, Stephanodiscus hantzschii f. tenuis, Synedra acus in diatoms. Asterionella gracillima and Stephanodiscus hantzschii f. tenuis were abundant at every station from winter to spring. Stephanodiscus hantzschii f. tenuis occupied the highest dominant ratio and standing crop. From summer to autumn, dominant species were Aulacoseira granulata at all stations and blue-green algae such as Osillatoria limosa, Microcystis aeruginosa, Merisomorpedia sp. at some stations. These 4 species were mostly present at the lower stations 4, 5, 6 and very few at the upper stations 1, 2, 3.