• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.802-807
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• 2003

International Convention Center Jeju(ICCJ) was planed and built for accommodating a variety of conventional and exhibitional activities. For a better flexibility of operation, almost all rooms in ICCJ are designed to be subdivided Into a couple of small rooms with installation of movable partition walls. Architectural and acoustical design should be deliberatively and cooperatively undertaken to cope with such a complex condition. Conference hall, the largest room in ICCJ, has a capacity of 5000 seats who:1 used as a whole. It could be divided into 3 halls, one with 2000 pre-installed seats on slanted floor, up/down removable stage and its settings above, and the other 2 flat rooms with no seats installed. A devided hall with pre-installed seats and stage is designed for a multi-use auditorium. Almost all surfaces except ceilings adjacent to the stage are sound absorptively treated, in regard to extensive use of sound reinforcement systems. Its reverberation time 1.65 sec without audience, which is roughly correspond to 1.50 sec with fully occupied audience. When there is a need for a larger room, all the partition wail Is removed and the hall could be used as a whole. Exhibition hall is located in the first floor of ICCJ. Absorption and softness are needed for the hat 1 because exhibition behavior has something noisy features. Perforated MDF panels with porous materials and air space in the back groundare adopted for the walls. There are one large, two medium, and several small convention rooms in ICJJ. The room are also acoustically designed for maximum flexibility with no defects soundwisely.

• 한국통신학회논문지
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• 제33권3B호
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• pp.135-143
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• 2008

본 논문은 CSMA/CA 경쟁방식 프로토콜을 사용하는 무선 PAN(WPAN: Wireless Personal Area Network)을 위해 QoS를 보장하고 에너지 효율적인 전송을 위한 방법을 제안한다. WPAN 장치들은 제한된 배터리 용량의 전지로 동작하기 때문에 에너지 소모는 WPAN 시스템에서 가장 중요한 문제 중의 하나이다. 따라서 WPAN이 경쟁기반 MAC 프로토콜을 사용할 경우 독립적 채널 접근 시도에 의한 충돌로 인하여 에너지 소모 문제는 더 중요하다. 본 논문에서는 에너지 소모를 최소화하면서 QoS를 보장하기 위해 최적의 fragment 크기, 변조 수준과 전송 전력을 선택하는 알고리즘을 제안한다. 제안한 알고리즘에 대한 성능평가를 수행하여 개선정도를 시뮬레이션 결과에 제시하였다.

• Advances in concrete construction
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• 제6권5호
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• pp.423-463
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• 2018

This paper investigates the behavior of normal and self-compacted steel fiber reinforced concrete (SCC-SFRC) corbels rehabilitated by Basalt Fiber Mesh (BFM) and Basalt Fiber Fabric (BFF) for the first time in literature. The research objective is to study the effectiveness of BFM and BFF in the rehabilitation of damaged reinforced concrete corbels with and without epoxy injection. The experimental program includes two types of concrete: normal concrete, and self-compacted concrete. For normal concrete, 12 corbels were rehabilitated by BFM without injection epoxy in cracks, with two values of compressive strength, three ratios of steel fiber (SF), and two values of shear span. For self-compacted concrete, 48 corbels were rehabilitated with different parameters where 12 corbels were rehabilitated by BFM with and without epoxy injection, 18 heated corbels with three different high-temperature level were rehabilitated by repairing cracks only by epoxy injection, and 18 heated corbels with three different high-temperature level were rehabilitated by repairing cracks by epoxy and wrapping by BFF. All 48 corbels have two values of compressive strength, three values volumetric ratios of SF, and two values of the shear span. Test results indicate that RC corbels rehabilitated by BFM only without injection did not show any increase in the ultimate load capacity. Moreover, For RC corbels that were repaired by epoxy without basalt wrapping, the ultimate load capacities showed an increase depending on the mode of failure of corbels before the rehabilitation. However, the rehabilitation with only crack repairing by epoxy injection is more effective on medium strength corbels as compared to high strength ones. Finally, it can be concluded that use of BFF is an effective and powerful technique for the strengthening of damaged RC corbels.

• 디지털융복합연구
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• 제16권7호
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• pp.479-491
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• 2018

본 연구는 저소득층 여성의 건강에 영향을 미치는 요인을 다각적으로 살펴보고, 그 중 사회적 지지 자원이 저소득층 여성들이 가지고 있는 다양한 특성과 건강 관계에서 상호작용을 하는지 파악하였다. 본 연구를 위하여 소득에 따라 저소득층 기준에 부합하고 2인 이상의 가족 구성원으로 이루어진 가구 내 성인 여성 239명을 대상으로 설문조사를 실시하였고 기술통계, 상관분석 및 회귀분석 등을 이용하여 연구 결과를 도출하였다. 연구 결과 저소득층 여성들이 평가하는 본인의 건강 수준은 중간 수준이었고, 그들의 건강에 미치는 요인으로는 교육수준, 자기효능감, 사회적 지지 자원 등이 파악되었다. 특히 사회적 지지 자원은 교육수준과 주관적 건강 관계에서 조절변인으로서의 기능을 하는 것으로 나타났다. 본 결과를 통해 저소득층 여성의 건강 증진을 위해서는 직접적인 건강 관련 측면뿐 아니라 자기 관리 역량강화와 같은 심리적 지원, 사회적 지지 자원 확대를 위한 안전망과 같은 제도 구축 등까지 포괄적 관점에서 접근할 필요가 있다는 시사점을 도출하였다. 그리고 후속적으로 저소득층 여성의 건강과 관련된 변인들의 시간속성을 검증하거나 대상을 세분화하는 연구가 이루어질 필요가 있다.

• Bulletin of the Korean Chemical Society
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• 제34권8호
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• pp.2408-2412
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• 2013

We demonstrate herein the synthesis and modification of magnetic nanoparticles and its use in the immobilization of the lipase. Magnetic $Fe_3O_4$ nanoparticles (MNPs) were prepared by simple co-precipitation method in aqueous medium and then subsequently modified with tetraethyl orthosilicate (TEOS) and 3-aminopropyl triethylenesilane (APTES). Silanization magnetic nanoparticles (SMNP) and amino magnetic nanomicrosphere (AMNP) were synthesized successfully. The morphology, structure, magnetic property and chemical composition of the synthetic MNP and its derivatives were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) analysis, X-ray diffraction, superconducting quantum interference device (SQUID) and thermogravimetric analyses (TGA). All of these three nanoparticles exhibited good crystallization performance, apparent superparamagnetism, and the saturation magnetization of MNP, SMNP, AMNP were 47.9 emu/g, 33.0 emu/g and 19.5 emu/g, respectively. The amino content was 5.66%. The AMNP was used to immobilize lipase, and the maximum adsorption capacity of the protein was 26.3 mg/g. The maximum maintained activity (88 percent) was achieved while the amount of immobilized lipase was 23.7 mg $g^{-1}$. Immobilization of enzyme on the magnetic nanoparticles can facilitate the isolation of reaction products from reaction mixture and thus lowers the cost of enzyme application.

• 약학회지
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• 제47권6호
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• pp.410-416
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• 2003

Autotaxin(ATX) was originally purified from conditioned media of A2058 human melanoma cells and shown to be a potent cell motility-stimulating factor, possessing a type II nucleotide pyrophosphatase/phosphodiesterase (NPP2) activity. Recombinant ATX has recently demonstrated that human plasma lysophosholipase D is identical to ATX and uses lysophosphatidylcholine as a substrate to mediate various biological functions including tumor cell growth and motility through G-protein coupled receptor. However, despite pivotal roles of ATX on physiological or pathophysiological states, the production of ATX is solely depends on complicated purification method which employs multiple column steps, but resulted in very poor yield. This limited the use of ATX for extensive analysis. We, therefore, expressed six histidine-tagged recombinant human ATX(His-ATX) in High Five TM insect cells to improve the generation of ATX and to make simple the purification of ATX. The signal sequence of the human ATX gene was truncated and replaced with sequence of insect cell secretion signal within expression vector. In addition, codons for six histidines were added to the C-termini of 120kDa ATX cDNA construct. A simple purification scheme utilizing two-step affinity column chromatography was designed to purify His-ATX to homogeneity from the culture supernatant of transfected insect cells. Homogenous His-ATX was detected and isolated from the concentrated insect cell medium using concanavalin A agarose and nickel affinity chromatography. Purified His-ATX was in full length with ATX capacity. A combination of this expression system and purification scheme would be useful for production and purification of high-quality functional ATX for research and practical application of multiple functional motogen, ATX/NPP-2.

• 한국산업정보학회논문지
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• 제19권5호
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• pp.103-115
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• 2014

최근 스마트 폰 등 이동단말기 사용이 급증함에 따라 국내/외 기업을 중심으로 언제 어디서나 일할 수 있는 스마트 오피스(Mobile-Office)가 빠르게 보급되고 있다. 스마트 워크가 부상하는 이유는 새로운 근무형태의 대두, 업무 효율성 제고, 스마트 폰 등 모바일 기반의 경제가 급성장하여 기업 환경이 변화하였기 때문이며, 이로 인해 일하는 방식의 변혁이 필요했던 것이다. 중소기업의 경우 최신 IT기술에 대한 활용능력이 대기업에 비해 상대적으로 부족하고, 개발 역량 및 자본 투자에 대한 한계가 존재하기 때문에 중소기업에 최적화된 개발 방법론 및 활용 방법이 필요한 실정이다. 신속하고 정확한 비즈니스 의사결정을 할 수 있는 모바일 환경에서의 비즈니스 인텔리전스 애플리케이션을 개발하였다. 스마트 오피스 이전 기업 환경에서의 문제점(접근성, 이동성, 효율성, 복잡성, 통합성)을 스마트 기기와 연동하여 해결하고, 중소기업의 입장에서 최소비용을 투자한 개발로 다양한 스마트 기기 및 웹 등에서 활용 가능한 애플리케이션의 효과적인 도입 방안을 모색하였다.

• 한국지반공학회지:지반
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• 제2권3호
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• pp.67-78
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• 1986

철근 콘크리트 얕은 기초 구조물의 파괴유형을 지반에 대해서는 지지력(BCM), 여밀 침하량 (CSM), R.C. slab에 대해서는 moment (MFM) 및 사인장 전단파괴(PCM) 등의 유형으로 설정하였다. 그런데, 이 4개의 서로 다른 유형에는 작용되는 하중 기초의 폭 및 깊이가 공통으로 입력되는 설계변수들이므르, 이 공통 설계변수들이 차지는 파괴영역을 고려하여 system reliability를 해석하 는 방법을 제시하였다. 또한 제시된 방법에 의해 대표적인 얕은 기초 구조물에 대한 신뇌도를 해석 한 바, 1. 단-거훈함수에 대한 신뢰지수는 CSM이 가장 낮고, 가장 안정한 상태는 PCM이었으며, BCM 및 MFM의 파괴확률은 유사하고 CSM과 PSM의 중간 정도였다. 2. 유상관 파괴유형에 대해서는, 이계법에 의한 윤독지수의 범익가 일계법에 비해서 러 쫍고 그 하한치가 더 크게 평여된다. 따라서, 구조물에 대한 통체적인 신뇌도는 파괴유형들 사이의 공분산 이 고려된 이계법으로 해석해야 과소허가될 위험이 없음을 알았다.

• 보건교육건강증진학회지
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• 제31권5호
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• pp.159-166
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• 2014

Purpose: In spite of many Healthy Cities projects in Korea, there are few research about healthy urban planning. So we tried to use available recent models to a Healthy Cities project in a medium sized city in Gyeongnam province. Methods: Using mainly European Healthy Urban Planning Model and opinion leader survey, SWOT analysis, forum and discussion have been done to a city. Secondary city health indicator obtained from Ministry of Statistics. Results: There are strong need to develop health industry, green traffic and healthy living from survey using Healthy Cities policy direction of Korean Health Promotion Fund. Among the Healthy Urban Planning objectives, improvements of physical environments, prevention of accidents and crime, improvements of healthy esthetics rated highly. Although environmental pollution was problem local government push forward to the pilot healthy urban project as active healthy water-front development. Considering secondary healthy city indicators, change of external forces and internal capacity final task for healthy urban planning for Yangsan city were development of riverside physical education park and active living and anti-ageing environments etc. Conclusions: Comprehensive assessment and plan was possible through MAPP Model using European Healthy Urban Planning objectives to draw the direction of future urban planning for Healthy Cities Projects. Further research and formal introduction would be needed.

• Biotechnology and Bioprocess Engineering:BBE
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• 제6권6호
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• pp.402-409
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• 2001

Different bioligands carrying synthetic adsorbents have been reported in the literature for protein separation, We have developed a novel and new approach to obtain high protein ad-sorption capacity utilizing 2-methacrylamidohistidine(MAH) as a bioligand. MAH was synthe-sized by reacting methacrylocholride and histidine, Spherical beads with an average size of 150-200㎛ were obtained by the radical suspension polymerization of MAH and 2-hydrosyethyl-methacrylate(HEMA) conducted in an aqueous dispersion medium. p(HEMA-co-MAH) beads had a specific surface area of 17.6㎡/g . Synthesized MAH monomer was characterized by NMR. p(HEMA-co-MAH) beads were characterized by swelling test, FTIR and elemental analysis. Then Cu(II) ions were incorporated onto the beads and Cu(II) loading was found to be 0.96 mmol/g.These affinity beads with a swelling ration of 65% and containing, 1.6 mmol MAH/g were used in the adsorption/desorption of human serum albumin(HSA) from both aqueous solutions and hu-man serum. The adsorption of HSA onto p(HEM-co-MAH) was low(8.8 mg/g). Cu(II) chelation onto the beads significantly increased the HSA adsorption (56.3 mg/g). The maximum HSA ad-sorption ws observed at pH 8.0 Higher HSA adsorption was observed from human plasma(94.6 mgHSA/g) Adsorption of other serum proteins were obtained as 3.7 mg/g for fibrinogen and 8.5mg/g for γ-globulin. The total protein adsorption was determined as 107.1mg/g. Desorption of HSA was obtained using 0.1 M Tris/HCl buffer containing 0.5 M NaSCN, High desorption rations(up to 98% of the adsorbed HSA) were observed. It was possible to reuse Cu(II) chelated-p(HEMA-co-MAH) beads without significant decreases in the adsorption capacities.