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        검색결과 21

        1.
        2020.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 도심지 산지형 공원의 물리적 구조 및 식생구조가 기상에 미치는 영향을 분석하기 위해 물리적 구조인 표고, 경사도, 사면 향, 지형구조와 식생 구조인 현존식생, 흉고직경, 울폐도의 기상과의 평균비교를 실시하였다. 분석 결과, 표고의 경우 상대습도, 풍속, 일사에서 유형 간 차이가 있는 것으로 분석되었으며, 경사도의 경우 풍속을 제외한 모든 기상요소에서 유형 간 차이가 있는 것으로 분석되었다. 사면 향의 경우 기온과 상대습도에서 유형간 차이나 있는 것으로 분석되었다. 지형구조의 경우 계곡부, 사면부, 능선부로 구분하였으며, 상대습도에서 측정 값의 차이가 있는 것으로 분석되었으나 기온, 풍속, 일사량에서는 일정한 경향과 유형간 차이가 미미한 것으로 분석되었다. 식생구조 중 현존식생의 경우 일사량을 제외한 기온, 상대습도, 풍속 항목에서 유형 간 차이가 있는 것으로 분석되었으며, 흉고직경의 경우 기온, 풍속, 일사량 항목에서 유형 간 유의한 차이가 있는 것으로 분석되었다. 울폐도의 경우 기온과 일사량에서 유의한 차이가 있는 것으로 분석되었다. 식생 및 물리적구조가 기상환경에 미치는 영향 분석을 위한 관계분석결과 기온의 경우 경사도와 사면 향, 흉고직경과 울폐도에서 영향을 받는 것으로 분석되었으며, 상대습도의 경우 물리적구조인 표고, 경사도, 사면 향, 지형구조와 식생구조인 현존식생과 울폐도에서 상관성이 분석되었다. 풍속의 경우 표고, 현존식생, 흉고직경에서 상관성이 분석되었으며, 일사량의 경우 경사도와 흉고직경, 울폐도간의 상관성이 분석되었다. 전반적으로 기온과 상대습도, 일사량에 가장 큰 영향을 주는 인자는 울폐도로 분석되었으며, 다음으로 경사도에서 상관관계가 높게 분석되는 경향이 나타났다. 흉고직경 또한 기온과 일사량간의 상관성이 매우 높은 것으로 분석되었으며 풍속과의 상관관계도 나타났으나 상대습도는 통계적인 유의성이 나타나지 않았다.
        4,200원
        6.
        2006.09 구독 인증기관·개인회원 무료
        The magnetic ferrite nanoparticles were synthesized and coated by silica precursor in controlling the coating thicknesses and sizeses. The surface modification was performed with amino-functionalized organic silanes on silica coated magnetic nanoparticles. The use of functionalized self-assembled magnetic ferrite nanoparticles for nucleic acid separation process give a lot of advantages rather than the conventional silica based process.
        11.
        2006.06 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        Building materials are composed of very complex chemical compounds. The aims of this paper are to investigate the emission concentrations of indoor pollutants from new apartment house and the emission variation patterns during 75 days. The average value of total volatile organic compounds(TVOCs) concentration was 3,768 ㎍/㎥ in five new apartments. Major VOCs included toluene, ethylbenzene, m,p-xylene and o-xylene. The average concentrations of each compound were measured as : benzene(58㎍/㎥), toluene (793㎍/㎥), ethylbenzene(438㎍/㎥), styrene(79㎍/㎥), m,p-xylene(1,210㎍/㎥), o-xylene(364㎍/㎥). The results indicated that the major VOCs from the new apartment were affected by building products such as on aromatic hydrocarbon compounds. TVOCs emission are characterized as high emission level at initial time (12,856㎍/㎥) and decreased through time. After a lapse of 75 days in sample house, TVOCs concentration decreased in about 20 times as compared with the initial concentration. The TVOCs emission profiles strongly depended on the generation mode and the concentration of the VOCs in building material.
        4,500원
        12.
        1998.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Sleep deprivation may affect the brain functions such as cognition and consequently, dynamics of the BEG. We examined the effects of sleep deprivation on chaoticity of the EEG. Five volunteers were sleep-deprived over a period of 24 hours They were checked by EEG during two days. thc first day of baseline period and the second day of total sleep deprivation period. EEGs were recorded from 16 channels for nonlinear analysis. We employed a method of minimum embedding dimension to calculate the first positive Lyapunov exponent. Fer limited noisy data, this algorithm was strikingly faster and more accurate than previous ones. Our results show that the sleep deprived volunteers had lower values of the first positive Lyapunov exponent at ten channels (Fp1, F4. F8. T4, T5. C3, C4. P3. P4. O1) compared with the values of baseline periods. These results suggested that sleep deprivation leads to decrease of chaotic activity in brain and impairment of the information processing in the brain. We suggested that nonlinear analysis of the EEG before and after sleep deprivation may offer fruitful perspectives for understanding the role if sleep and the effects of sleep deprivation on the brain function.
        4,000원
        13.
        2018.10 KCI 등재 서비스 종료(열람 제한)
        The characteristics of PM10, PM2.5 and Ratio(PM2.5/PM10) of 11 urban air monitoring stations in Gyeongnam were analyzed for the last 3 years(`15~`17). The average of the all stations was PM10 45 μg/㎥, PM2.5 24 μg/㎥ and Ratio 0.54, and annual reduction rates were PM10 -2.9%, PM2.5 –2.7% and Ratio –1.2%, respectively. The seasonal characteristics of PM10 were spring 54 μg/㎥ > winter 48 μg/㎥ > summer/autumn 40 μg/㎥, PM2.5 were spring/winter 26 μg/㎥ > summer 23 > autumn 22 μg/㎥ and Ratio were summer 0.56 > winter 0.55 > autumn 0.54 > spring 0.51, respectively. The hourly characteristics of PM10 were 11 μg/㎥ higher than 09:00~12:00 at 03:00~06:00, PM2.5 were 6 μg/㎥ higher than 09:00~12:00 at 17:00~18:00 and Ratio were 0.07 higher than 04:00~06:00 at 19:00. By site, the highest concentration of PM10 was YJ site 53 μg/㎥ and PM2.5 was HW site 28 μg/㎥. And Ratio at HD site showed the largest reduction from `15 0.62 to `17 0.52.
        14.
        2018.02 KCI 등재 서비스 종료(열람 제한)
        The study revolved around the forests of Yangjae Citizen’s Forest, a park where the Crime Prevention Through Environmental Design (CPTED) was applied. The survey methods for analysis are as follows. From August to October, a total of eight surveys were conducted and 147 of the 300 samples collected were utilized for analysis. According to the results of the survey, 43.5% of participants were males and 56.5% were females. The highest number of participants visited the forest at midday and aged twenties visited most among all age groups. The participants visited the forest mostly with family and the main purpose of visit was for walking exercise including strolling. In case of criminal experience two sexual harassment (6.0%), and a fraud crime (3.0%) were tallied. Insecurity analysis resulted that “other users’ drinking” and “few Closed-Circuit Televisions (CCTVs)” were found to increase visitor’s insecurity. According to the psychological security analysis, participants reported they felt safer in open space than the enclosed areas. They also responded that dense wooded areas along the trails would increase the level of insecurity, while open space and resting areas were effectively relieve unsafe feelings. CCTVs and lighting fixtures facilities in the study area play an important role to effectively manage the park to prevent crime.
        15.
        2016.10 KCI 등재 서비스 종료(열람 제한)
        This research assessed the disparity in anion generation according to the vertical structure of a Zelkova Serrata tree for the purpose of creating a pleasant and green city environment. Measurements for the study were conducted between July and August of 2014 in Chung-ju in the central region of the Republic of Korea. The average anion generation of vertical structure trees during active photosynthesis periods was: L Section (839.0 ea/cm3) > M Section (664.6 ea/cm3) > U Section (472.0 ea/cm3). According to DMRT analysis, significant difference was found in the average between the L, or M Locations and the U Locations. During dormant photosynthesis periods, records showed that the anion production at the M Location (1,212.5 ea/cm3) > L Location (1,050.4 ea/cm3) > H Location (844.1 ea/cm3), According to DMRT analysis, the difference within each location was significant for α=0.05. In a comprehensive analysis of the weather factors in each vertical structure, anion generation during active photosynthesis periods showed a positive correlation with solar radiation and a negative correlation with wind speed. Dormant photosynthesis periods showed negative correlations with both solar radiation and temperature, and positive correlations with relative humidity and wind speed. Predictions from a multicenter retrospective study showed that during active photosynthesis periods, Y1 = 282.443X1 + 512.07, and Y2 = 314.337X1 + 16.913X2, while during dormant photosynthesis periods, Y1=391.009X1 + 840.043, and Y2=351.412X1 + 32.765X2.
        16.
        2014.10 KCI 등재 서비스 종료(열람 제한)
        The object of this research is to find out the psychological change of observer according to the index of Greenness in the space of scenic planting, and research is proceeded with total 112, male students 69, and female students 43. The index of Greenness experimented with 5 pictures, 20%, 40%, 60%, 80%, and 100%, and carried out the test after selecting each picture of the index of Greenness for landscaping in Konkuk University Global Campus. To find out the mood condition of testee, POMS and SD was used for analyzing. As a result of TMD among POMS, male and female students are shown as each 60% > 100% > 40% > 20% > 80% in order. As a result of SD, male and female students are shown as 80% > 20% > 40% > 60% > 100% in order and the index of Greenness 100% makes people feel fluent and natural about plants but closed and constrained than the index of Greenness 80%.
        17.
        2014.06 KCI 등재 서비스 종료(열람 제한)
        Cardiovascular system is the primary organ to develop and reach a functional state, which underscores the essential role of the vasculature in the developing embryo. The vasculature is a highly specialized organ that functions in a number of key physiological works including the carrying of oxygen and nutrients to tissues. It is closely involved in the formation of heart, and hence it is essential for survival during the hatching period. The expression of genes involved during vascular development in the olive flounder (Paralichthys olivaceus) in the days after hatching is not fully understood. Therefore, we examined the expression patterns of genes activated during the development of flounder. Microscopic observations showed that formation of blood vessels is related to the expression of the vimentin gene. Also, the temporal expression patterns of this vimentin-like gene in the developmental stages and in the normal tissues of olive flounder. The purpose of this study was to examine the expression patterns of vimentin in normal tissues of the olive flounder and during the development of the vascular system in newly hatched olive flounders and HIF-1 plays a vital role in the formation of blood vessels during development. Vimentin expression was strong at the beginning of the development of blood vessels, and was present throughout all developmental stages. Our findings have important implications with respect to the roles of vimentin and HIF-1 in the development and evolution of the first blood vessels in olive flounder. Further studies are required to elucidate the vimentin-mediated hypoxic response signal transduction and to decipher the functional role of vimentin in developmental stages.
        18.
        2014.06 KCI 등재 서비스 종료(열람 제한)
        Fish larvae are immediately exposed to microbes from hatching to maturation of their lymphoid organs, therefore effective innate mechanisms is very important for survival. However, the knowledge of the development of immune system in fish is limited and in demand now. In vertebrates, recombination-activating gene 1 (RAG-1) and immunoglobulin M (IgM) have been considered as very useful markers of the physiological maturity of the immune system. In this study, the expression of the both genes was assessed throughout the early developmental stages of olive flounder larvae (5-55 dph) and used as markers to follow the development of immune system. RAG-1 and IgM mRNA expression was detectable at 5 dph and remained so until 55 dph. These patterns of expression may suggest that the olive flounder start to develop its function around 5 dph. Tissue distribution was found that both genes mRNAs are only expressed in the immune-related organ such as spleen, kidney and gill. The early detection of IgM mRNA led to the investigation of its presence in oocytes. Both RAG-1 and IgM mRNA transcripts were detected in unfertilized oocytes, suggesting that they are maternally transferred. The biological significance of such a phenomenon remains to be investigated.
        19.
        2012.12 KCI 등재 서비스 종료(열람 제한)
        This study was conducted to analyze the difference of body types within and between wild and farmed populations of olive flounder Paralichthys olivaceus using measured records of morphological traits. The results showed that surveyed traits and standard deviation were of body weight, of total length, and of body length. Also body height, body shape index and condition factor were , and , respectively. As result of least squares mean and standard error for each trait assumed in this study, those of farmed population showed significantly higher than those of wild population in all traits, exclusively in total length and body length (p<0.01). Particularly, the values of the body height and the body weight of the farmed population were higher than those of the wild population in the same total length. And the phenotypic correlation coefficients of the body weight, the total length, the body length and the body height showed strong positive correlation in all populations. These result suggested that morphological differences exist in farmed and wild flounder. Therefore, introduction of wild flounder is essential for the future production to improve the body type of farmed flounder, and parental fish should be chosen by considering selection of commercially important traits in the production process.
        20.
        2009.12 KCI 등재 서비스 종료(열람 제한)
        In this paper, a 3m-class free running model ship will be introduced with its manoeuvring performance experiments. The results of turning circle test and zig-zag test will be explained. The developed system are equipped with GPS, main control computer, wireless LAN, IMU (Inertial Measurement Unit), self-propulsion propeller and driving rudder. Its motion can be controlled by RC (Radio Control) and wireless LAN from land based center. Automatic navigation is also available by pre-programmed algorithm. The trajectory of navigation can be acquired by GPS and it provides us with important data for ship's motion control experiments. The results of manoeuvring performance experiment have shown that the developed free running model ship can be used to verify the test of turning circle and zig-zag. For next step, other experimental researches such as ship collision avoidance system and automatic berthing can be considered in the future.
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