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이한슬 ( Han Seul Lee ),김진수 ( Jin Su Kim ),심재훈 ( Jae Hoon Shim ),강민구 ( Min Koo Kang ),김성근 ( Seong Geun Kim ),이상일 ( Sang Ill Lee ) 한국수처리학회 2015 한국수처리학회지 Vol.23 No.5
Magnetite(Fe3O4) nanoparticles are used in nanotechnological applications and removal of heavy metals from wastewater. This study investigated the influence of synthesis conditions on the size and shape magnetite(Fe3O4) nanoparticles for the removal of heavy metals. Magnetite size is influenced by synthesis temperature, NH4OH concentration, pH and the atmosphere(O2 and N2). We synthesized the magnetite in two ways. One is by pouring the NH4OH solution(M1) and the other is by injecting in 6 ml/min(M2). Magnetite-M1 and M2 size was 13.58, 8.8 nm. From the Langmuir isotherms, the maximum adsorption capacities towards Cu were Magnetite-M1: 17.04 mg/g and Magnetite-M2: 21.07 mg/g. That data shows the synthesized Magnetite by putting NH4OH solution(6 ml/min) is more property to remove heavymetal from wastewater.
이한슬(Lee Han seul),황인철(Hwang In chul) 한국조형디자인학회 2017 조형디자인연구 Vol.20 No.2
우리나라 불교미술문화에서의 탑은 대표적 조형예술물이다. 탑은 무수히 건립되었지만 현재 남아있는 것은 돌로 만들어진 석탑이 대부분이다. 석탑은 옛 선조들의 꾸밈없는 미의식을 담고 있으며 오랜 기간에 걸쳐 계승·발전되어왔다. 우리나라 석탑의 구조적인 형태와 장식적인 모습을 통해 참다움을 깨우치고 그 당시 선조들의 가치관을 알 수 있다. 이에 통일신라시대에 정형양식이 되기까지 석탑의 성립과 발전된 과정을 비교 분석하여 그 특성을 정립하고 조형성을 재발견하고자 한다. 본 연구는 석탑 고유의 전통미, 독창성, 조형성을 고찰하여 현대 조형 디자인 연구에 조형적, 문화적 기틀을 마련할 수 있는 기초자료로 제시하고자 하는데 있다. 따라서 통일신라시대의 석탑들을 연표로 정리하고 전형양식에서 정형양식으로 변화하는 차이를 나열하여 이론적 배경을 확립하였다. 통일신라시대 석탑의 조형적 특성을 분석하기 위해서 석탑의 형태적 측면, 구조적 측면, 상징적 측면을 연구해 얻은 결론은 다음과 같다. 첫째, 통일신라시대 석탑의 변화된 과정을 시원기(7c), 전형기(8c초), 정형기(8c중기~후기), 하대기(9c)로 분리해서 정리할 수 있으며 그 결과 석탑의 조형적인 측면에서 정형양식이 확립된 이후로 지역과 시대에 따라 크게 다르지는 않지만 부분적인 변화로 인해 독창적인 석탑들의 형태가 나왔음을 알 수 있었다. 둘째, 대부분의 석탑들이 문화재로 등록되어있고, 그 석탑들을 중심으로 7세기~9세기까지 정형화된 조형적 변천과정을 정리하였다. 셋째, 석탑의 형태적 측면, 구조적 측면, 상징적 측면을 조사 연구 하였고, 그 결과 정형양식에서의 변화가 건축적, 구조적인 변화뿐만 아니라, 신앙적 측면에서의 변화가 있었다는 것을 알수 있었다. 또한 장식적인 요소 중, 상징하는 것과 비례적인 부분을 중요시 하는 우리 선조들의 조형적인 감각을 엿 볼 수 있었다. In the Buddhist art culture of Korea, towers were artistic sculptures and were built in countless numbers, but most of the remaining pagodas are the ones made of stone. Stone pagodas contain the aesthetic sense of ancient ancestors and have been inherited and developed over a long period of time. By realizing the true aspects Korea’s stone pagodas and learning about their structural and decorative aspects, we can see the values of our ancestors. Therefore, this study intends to compare and analyze the process of establishing and developing the stone pagodas until the formation of the fixed style in the Unified Silla period which our ancestors built over a long period of time, find out their characteristics, and rediscover their formativeness. This study aims to review the unique traditional beauty, originality and formality of stone pagodas and provide base data to form a formative and cultural framework in contemporary formative art design research. Therefore, the pagodas of the Unified Silla period were summarized in a chronological table, and the theoretical background was established by listing the differences in the change from typical style to fixed style. In the analysis of the formative characteristics of the pagodas in the Unified Silla period, the following conclusions were gained regarding the arrangement of the pagodas, the construction process, the structure, and decorative elements. First, the changing process of the stone pagodas of the Unified Silla period can be divided into three phases: the inception period(7c), the typical period(early8c), the fixed period(mid~late8c), and the final period(9c). Since the establishment of the fixed style, it was found that unique forms of stone pagodas emerged due to the partial changes, though not greatly different according to the area and the age. Second, most of the pagodas are registered as cultural assets and this study systematically organized the process of typical formative transition from the 7th century to the 9th century centering on the pagodas. Some of them have been lost, but about 120 pagodas were erected. Third, the construction process, structure and decorative elements of the stone pagodas were studied and as a result, it was found that the change in the fixed style involved not only change of architectural structure but also change of faith. Also, we can observe the formative sense of our ancestors who valued the symbolic aspects of decorative elements and the proportional parts.
Bacillus sp. 부착 여재를 사용한 여과시설의 비점오염원 처리장치 개발
이한슬 ( Han Seul Lee ),김진수 ( Jin Soo Kim ),신총수 ( Chong Soo Shin ),심상보,김달우,강민구 ( Min Koo Kang ),이상일 ( Sang Ill Lee ) 한국수처리학회 2015 한국수처리학회지 Vol.23 No.1
This study was conducted to reduce runoff by rainwater infiltration facility using attached growth with bacillus sp., which are reported to remove nitrogen and phosphorus as well as organic matter effectively. This study was investigated non-point pollutants removal efficiency of organic, nitrogen, and phosphorus in column using the media attached growth with bacillus sp.. To compare attached growth with bacillus sp. and detached media, two columns filled with perlite, zeolite, vermiculite, pumice, peat-moss was installed. In A column(attached growth with bacillus sp.), in case of infiltration velocity 30 mm/hr in high concentration of influent, it showed the removal efficiency(after aging term) is SS(suspended solid) 85.8±1.2 %, T-P(total phosphorus) 67.0±8.1 %, T-N(total nitrogen) 66.0±4.9 %, COD(chemical oxygen demand) 73.6±2.9 %, NH4+-N 72.7±3.0 %. In B column(detached media), in case of infiltration velocity 30 mm/hr in high concentration of influent, it showed the removal efficiency(after aging term) is SS 86.0±2.2 %, T-P 62.5±11.3 %, T-N 53.3±3.9 %, COD 34.6±3.7 %, NH4+-N 61.5±2.8 %. Removal efficiency of A column is better than B column. As the result from this study, using media with bacillus sp. can improve a effective removal of non-point source pollutants.
이한슬(Lee, Han Seul),전세희(Jeon, Se Hee),김가은(Kim, Ga Eun),김도희(Kim, Do Hee),진수정(Jin, Su Jeong),김시우(Kim, Sea Woo),정석원(Jung, Seok Won),신아엘(Shin, A-el) 한국정보기술학회 2015 Proceedings of KIIT Conference Vol.2015 No.6
현재 우리가 살아가고 있는 디지털 시대에서는 스마트폰 없이는 생활이 불가능 할 정도로 스마트폰의 활용도가 높아지고, 없어서는 안 될 IT 기기가 되었다. 모임 어플리케이션이 늘어나면서 SNS를 통한 사람들과의 모임 활동이 잦아졌다. 기존의 모임 어플리케이션 기능인 일정, 알람 등 뿐만 아니라 각 모임에 어울리고 그에 세분화 된 어플리케이션의 필요성을 느꼈다. 이 SNS 연계 단체 모임 지원 큐레이션 시스템은 기존에 출시됐던 다른 모임용 어플리케이션의 기능에 출석체크, 자리배치, 회비관리, 스포츠 라인업 등의 부가적인 형태를 추가하여 다양한 모임과 더불어 학교, 회의, 강연, 동호회 등에서 활용 가능한 어플리케이션이다. In this digital world, we live in; Smart phone is indispensable IT equipment. We cannot live without Smart Phone because people depend on this equipment more than before. Group activity, through SNS, becomes frequent because of increasing of applications. Due to increase group activity, we see the necessity subdivided applications which have several functions such as schedule, alarm and so on. This curation system, supporting group activity connected by SNS, is added some functions: checking attendance, seat positioning, managing membership fee, lineup of sports. It is differentiated application. So, this system is available application for using in school, meeting, lecture, speech, club and so on.
이한슬 ( Han Seul Lee ),김진수 ( Jin Su Kim ),심재훈 ( Jae Hoon Shim ),강민구 ( Min Koo Kang ),김성한 ( Seong Han Kim ),이상일 ( Sang Ill Lee ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.1
Phenol compounds in wastewater is difficulty in treatment because of higher salinity, acidity, COD and non-biodegradable properties. So there is limitation to control phenol wastewater using the so far conventional process. An alternative method of treating such wastewater is Advanced oxidation processes(AOPs). Ozone(O3) process can easily destroy the phenol compounds using its highly reactivity with free radicals, especially hydroxyl radicals. In this study, magnetite was developed as an ozonation assistance material for the degradation of phenol in water. Magnetite NPs have attracted widespread attention as their unique properties, such as high surface area, chemical reactivity, the nearly full polarization, inexpensive and supermagnetisim so that magnetite is easily separated and recovered. In order to evaluate the adsorption on magnetite, experiments were performed in two different ways(single ozonation, Ozonation/Magnetite). 10 g/L of magnetite and 200 mg/L-phenol(C0: 511.21 mg/L) water was mixed generating the ozone(1g/hr). After 3 hr, phenol removal was 100% and COD removal was 84.35%. The degradation efficiency of phenol and COD increased about each 28.84, 34.10% due to the adsorption of magnetite.