기존 연구들은 확증적 데이터 분석을 통하여 거시경제지표, 주택정책 등의 영향이 시/도 사이에 상이함을 증명하였지만 해당 지역 내의 주택가격 변동의 역동성을 보여주지는 못하였다. 본 연구는 탐색적 공간 데이터 분석을 통하여 보다 상세한 공간 단위에서 아파트 매매가격의 시공간적 역동성을 탐색하고자 한다. 주요한 분석 결과는 다음과 같다. 첫째, 가격 급등시기, 2008년 세계금융위기의 영향 등에서 시/도별로 큰 차이가 나타났다. 둘째, 2006년 1월부터 2016년 6월까지 실거래 가격 변화를 주택정책과 함께 살펴본 결과 주거안정 정책은 가격 하락을, 시장 활성화 정책은 가격 상승을 가져왔다. 정책효과는 대체로 3~5개월 지속되었다. 셋째, 가격변동이 심한 10개 시기별로 시/구 수준에서 단위가격과 변동률 및 변동액의 관계를 살펴본 결과 시기별로 가격 변동을 주도한 시/구들이 상이하였다. 마지막으로 군집분석 결과 시기별로 공간 군집의 위치와 범위가 상이하게 나타났다. 또한 몇몇 시/구에서는 이웃한 행정구역 사이에 상반된 연관성 유형을 보이는 등 국지적 역동성이 나타났다.

Marine structures developed for marine industry and resource manifests different fluid characteristics. As such, the changes in the location, shape and size of these structures affect the fluid flow. Specifically, this wake flow caused by the structures result in environmental damage and topographical change. but on the other hand, protects harbor facility and environment. This study was conducted by changing the position of vertical plate in horizontal and vertical direction and experimented the variation of wake flow by PIV. This experiment confirmed the wake flow reduction by the changes of gab in horizontal and vertical direction. Particularly, the experiment showed that changes of gab in horizontal and vertical direction resulted in an increased u-velocity fields in the back of structure for larger horizontal gab.

This study was performed to analyze the psychologic change of Tae-kwon-do Athletes who were wearing the mouth guard and one of contact sports during their matches of Tae-kwon-do 10 selected Tae-kwon-do athletes who had no injuries which they had college Tae-kwon-do sparring matches in the Cheon-an area have participated in the study. The oral impressions if the selected athletes were taken to produce for individual custom mouth guards. After the mouth guards were produced, each of them sat in a chair and attached G.S.R. surface electrodes in the palms of the ends of the second and third fingers of their left hands without moving their left hands, And then they were asked to watch footages of Tae-kwon-do games to stimulate them as if the had have a mock match, and Labscribe2 which are one of polygraphy was used to record their G.S.R. values. To determine whether the mouth guards affected the changes of their psychological status during the sparring matches of not, the experimental group wore the mouth guards while they watched the footages, and the control group didn’t wear any mouth guards. The G.S.R. values of the two groups were measured while the watched the footages. To see if there were and significant polygraphy differences between the experimental group and the control group in G.S.R. values, a statistical package SPSS was used to make a comparative analysis. And there were significant change in between the experimental and control group that wore the mouth guards, and it was concluded the wearing mouth guards exerts an influence on change in the psychological state of Tae-kwon-do athletes while they watch a footage of mock match.

수많은 정보의 홍수 속에서 소비자는 자신의 감성에 맞는 스타일을 선택하기 원하므로 개인화 서비스에 대한 효용과 필요성이 꾸준히 증가하고 있다. 본 연구에서는 적극적 개인화 쇼핑몰의 샘플 동영상을 직접 제작하여 인터넷 쇼핑몰 이용자 대학생 170명에 대하여 이를 경험하도록 하였고 이에 따라 소비자 반응이 변하는 것을 측정하였다. 또 소비자의 개인화의 수준에 따라 소비자의 웹사이트 평가, 만족도/인터넷 행동, 제품품질평가 등 반응도 조사하였다. 또한 이를 선호쇼핑몰의 종류, 인터넷 쇼핑몰 접속 횟수에 따라 차이가 존재하는지를 조사하였다. 결과는 첫째, 적극적 개인화 쇼핑몰을 이미 경험해본 대학생 소비자의 경우 적극적 개인화 수준이 높게 나타났다. 선호 쇼핑몰의 종류에 따라서 소극적 개인화 수준이 달랐는데, 일반의류 쇼핑몰을 선호하는 사람들이 낮고 복합대형쇼핑몰과 소셜커머스를 선호하는 사람들은 소극적 개인화 점수가 높았다. 둘째, 대학생 소비자의 적극적 개인화 동영상 경험 전후에 따라서 만족도/인터 넷행동, 제품품질 평가는 변화하지 않는 것으로 나타났으나, 소극적 개인화 점수는 감소하고 적극적 개인화 점수와 웹사이트 평가는 증가하는 것으로 나타났다. 셋째, 인터넷 쇼핑몰 접속 횟수는 만족도/인터넷행동, 웹사이트 평가와 정적 상관이 있는 반면에, 적극적 개인화 요소는 만족도/인터넷 행동, 웹사이트 평가와 부적 상관이 있었다.

고분자 전해질막은 수화상태에서 이온전달채널을 형성하여 연료전지 시스템내에서 수소이온을 전달하는 핵심적인 역할을 한다. 저가습 상태에서는 효과적인 이온전달이 잘 이루어지지 않는 것으로 보고되며, 친수성 및 소수성 영역의 명확한 상분리가 일어나는 불소계 고분자 전해질 막에 비하여, 탄화수소계 고분자 전해질 막에서는 이러한 상분리 현상이 상대적으로 약하게 일어나고, 그 결과로 낮은 수소이온 전도도를 갖는 것으로 알려져 있다. 본 연구에서는 이러한 낮은 수소이온 전도도를 분자 구조 측면에서 규명하기 위하여, 분자전산모사를 통해 가습 상태 변화에 따른 함수율 조건을 이용하여 고분자 전해질막 모델을 만들고, 이를 서로 비교하여 이온전달 채널의 형성에 어떤 요소들에 영향을 미치는지 규명 하고자 한다.

Ionic liquids (ILs) are organic salts with low melting point by asymmetric ionic strength between cation and anion. They have been known as promising DNA extraction, separation and preservation agent due to their hydrophilic, hydrophobic interaction with DNA. However, few studies have been performed about how DNA-ILs complexes form and their mechanism. Herein, we present three types of ionic liquids (EMIM-Cl, BMIM-Cl, and OMIM-Cl) change the DNA structure depend on alkyl chain length of ionic liquids. Structural changes of DNA by ionic liquids are observed by Atomic force microscopy, gel electrophoresis, zeta potential and solid-state nanopore technology. The results of AFM show the different structures of DNA, including aggregate, stretching, and bundling shapes in terms of EMIM-Cl, BMIM-Cl, and OMIM-Cl respectively. In DNA translocation experiment, DNA/EMIM-Cl show rare translocation signal due to aggregated structure by neutralized surface charge. DNA/BMIM-Cl and DNA/OMIM-Cl show slowing down the translocation speed due to changes of DNA net charge and structure. Especially, OMIM-Cl make slowing down the DNA translocation speed about 102~104 times compared to translocation speed of bare DNA by unzipping the bundling shape of complex. In conclusion, the morphology of DNA could be modified by the incorporation with different alkyl chain length of ILs, providing their further application in nanopore technique for slowing DNA sequencing or understanding protein-DNA interaction.

To stabilize the supply of kimchi by extending the storage period of spring kimchi cabbage, this study manufactured kimchi from spring kimchi cabbage under varying storage conditions and periods, and analyzed their quality and sensory characteristics following the maturing period. Trimming loss was lowest in the group of plasma+reverse direction+predrying+ HDPE film processing. The salting yield of spring kimchi cabbage stored for 12 weeks was lower than that of spring kimchi cabbage stored for 6 weeks, and the kimchi yield was low in the pre-treatment group of spring kimchi cabbage stored for 12 weeks. The firmness was slightly different according to the storage period from one month of maturation. From the perspective of pH and acidity, the maturation in the reverse direction+pre-drying+HDPE film processing group was slower than that in the normal group (<0.05). In the sensory evaluation, the preference was increased in the low temperature storage processing group as the maturation period was increased (<0.05).

In the present study, the structural and fatigue analysis on the shape change of an automatic press are investigated for prediction of operation safety and reliability of the automatic press along the thickness(t) and length(L) of head, and corner shapes(case 1, 2, 3). The equivalent stress and deformation characteristics of the automatic press were studied by computerized analysis method for the bushing production of the seat frame. An external stress of 14.0 MPa was applied to predict the operation stability and the fatigue limit of the structure. As the thickness of the header increased and the length of the header decreased, the load stability applied by the piston improved and the maximum stress and deformation were reduced. In addition, due to the change in shape of the corners, the load applied at the cross-sectional area of the corners decreases, and then the maximum stress and deformation appearing in the header are reduced. That is, the change of corner shapes affects the equivalent stress and deformation. That is the change of corner shapes affects the equivalent stress and deformation. From the fatigue and vibration analysis, fatigue failure does not occur even when the number of alternating operation of the automatic press increases, and the natural frequency is predicted for dynamic characteristics.

This study was designed to investigate the contents of icariin during ripening of Epimedium koreanum with sugar and Soju (25, 30, and 35% alcohol contents) using a homemade method. Contents of icariin of Epimedium wine were examined using high performance liquid chromatography. Icariin levels in Epimedium wine increased during the first 3 days of storage; after 6 days, icariin contents decreased gradually until 30 days. Contents of icariin in Epimedium wine by storage temperature (5 and 20°C) were not different during storage. After 30 days, icaiin was not detected in all tested Epimedium wines. Epimedium wines were assessed for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, 2,2'-azinobis( 3-ethylbenzothiazoline-6-sulfonic acid) and (ABTS) radical scavenging activity. DPPH and ABTS radical scavenging activities increased in early storage periods, however, after 6 or 9 days, activities decreased gradually.

급격한 수온의 변화는 어류의 생리학적인 측면에서 스트레스를 유발한다. 본 연구에서는 넙치 (Paralichthys olivaceus)로부터 각 수온별(9, 12, 15, 18 및 21℃) 조건에 따라 24 및 48시간 동 안 노출시킨 후에, 혈액생리학적 분석, 스트레스 단백질로 알려진 Hsp70 mRNA 발현 및 산소 소비량을 조사하였다. 혈액학적 분석에서 hematocrit (Ht) 및 hemoglobin (Hb), 혈장 코티졸 및 글루코스의 변화, aspartate aminotransferase (AST) 및 alanine aminotransferase (ALT), NH3, 삼 투질농도(osmolality) 및 총단백질(total protein, TP)은 9℃ 및 12℃에서 다른 수온별 실험구에 비 해 대부분의 항목에서 유의적인 차이를 보였다. Hsp70 mRNA 발현은 9℃ 및 12℃에서 다른 실험구에 비해 높은 발현량을 확인하였고, 산소소비량은 9℃ 및 12℃에서 21℃에 비해 낮았다. 이러한 결과는 넙치 종자의 장거리 수송을 위한 수온자료로 활용할 수 있다

선창은 선박의 화물을 싣는 공간으로 구조적 문제로 인해 세정작업은 위험성이 크고 작업 난이도가 높은 작업이다. 이 연구에서는 전용 선창세정기의 설계 자료로 활용하기 위해 압력변화에 따른 분무특성을 고찰한 결과 노즐 형상의 최적화를 위한 변수 요소를 확인 하였다

Biodiesel fuel (BDF) can be effectively used as an alternative fuel in diesel engines. The BDF, however, may affect performance and exhaust emissions of the diesel engine because it's physical and chemical properties are different with from the diesel fuel such as viscosity, compressibility and so on. To investigate an effect of injection timing on characteristics of performance and exhaust emissions with the BDF in an IDI diesel engine, this research applied the BDF derived from soybean oil in this study. The engine was operated with six different injection timings from TDC to BTDC 12 ˚CA and six different loads at the engine speed of 1500 and 2000 rpm. In less then the BDF 20, it showed the similar trend compare to the diesel fuel. But, the best injection timing was 2˚CA retarded compare to the diesel fuel with BDF 50.