• 농촌계획
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• 제30권2호
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• pp.69-77
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• 2024

As impervious area increases due to urbanization, rainfall on the impervious area does not infiltrate into the ground, and stormwater drains quickly. Low impact development (LID) practices have been suggested as alternatives to infiltrate and store water in soil layers. The practices in South Korea is applied to urban development projects, urban renewal projects, urban regeneration projects, etc., it is required to perform literature research, watershed survey, soil quality, etc. for the LID practices implementation. Prior to the LID implementation at fields, there is a need to simulate its' effect on watershed hydrology, and Storm Water Management Model (SWMM) provides an opportunity to simulate LID practices. The LIDs applied in South Korea are infiltration-based practices, vegetation-based practices, rainwater-harvesting practices, etc. Vegetation-based practices includes bio-retention cell and rain garden, bio-retention cells are mostly employed in the model, adjusting the model parameters to simulate various practices. The bio-retention cell requires inputs regarding surface layer, soil layer, and drain layer, but the inputs for the drain layer are applied without sufficient examination, while the model parameters or inputs are somewhat influential to the practice effects. Thus, the approach to simulate vegetation-based LID practices in SWMM uses was explored and suggested for better LID simulation in South Korea.

• 대한방사선기술학회지:방사선기술과학
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• 제37권3호
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• pp.169-175
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• 2014

2013년 국민건강보험심사평가원의 의료기관 데이터베이스에 따르면 1118개의 병.의원에 영상의학과가 개설되어있다. 이들 병원에는 CT, 투시촬영장치, 일반촬영장치와 같은 의료용 방사선 발생장치가 운영되고 있다. 이 중에서도 일반촬영장치는 가장 많은 병원에서 운영되고 있는 장비이다. 일반촬영장치의 경우 film-screen 장치에서 digital radiography 로 급격하게 변하고 있다. 하지만 그 촬영기법은 films-screen 기법을 그대로 사용하고 있어 디지털 장치의 맞는 촬영기법의 개발을 위한 전반적인 실태 조사가 필요하다. 이에 본 연구에서는 국내 의료기관의 일반촬영기법에 관한 조사를 시행하여 실제 병원에서 사용하고 있는 일반촬영기법의 기술적 항목에 대한 현황을 파악하여 보았다. 본 연구에서는 의료기관에서 일반적으로 사용되는 일반촬영기법 26개에 대한 촬영기법의 전국 단위 조사에서 흉부, 두부, 척추, 골반에 해당하는 검사에 대한 분석을 시행하였다.

• 기술혁신학회지
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• 제16권2호
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• pp.506-529
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• 2013

2010년 유엔 생물다양성협약 총회에서 나고야의정서(일명, ABS)가 채택됨으로 인해 각 국가는 해외자원의 이용과 국내자원에 대한 보호 측면에 관한 전략적인 대응이 필요하게 되었다. 본 연구는 우리나라가 ABS이행을 위한 대응정책을 효과적으로 하고 있는지 평가하고, 관련 부처 및 기관들의 긴밀한 연계체계 구축과 통합적 관리 및 효율적 운영 시스템을 확립하기 위한 방안을 찾고자 하였다. 연구결과 우리나라 정부 부처들은 다양한 생물유전자원관리 법률을 가지고 있으나 ABS에서 제기하고 있는 이용 및 이익 공유에 대한 규정을 모두 갖고 있지는 않은 것으로 나타났다. 대부분의 법률은 생물유전자원의 보존, 혹은 그 서식지의 보전 측면을 강조하고 있으나, '자원이용국'으로서 가지고 있어야 할 제도나 전략에 대해서는 미비한 것으로 나타났다. 따라서 향후 과제는 ABS에 대응하여 '자원제공국'뿐만 아니라 '자원이용국' 입장에서의 부처별 역할 조정 및 통합이 필요하고, 원산지 기재 특허 요건화에 대해서도 법률적으로 입장을 뚜렷이 할 필요가 있다.

• 한국의학물리학회지:의학물리
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• 제28권1호
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• pp.22-26
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• 2017

We have developed an analytic software that can easily analyze the spot position and width of proton beam therapy nozzles in a periodic quality assurance. The developed software consists of an image processing method that conducts an analysis using center-of-spot geometry and a Gaussian fitting method that conducts an analysis through Gaussian fitting. By using the software, an analysis of 210 proton spots with energies 150, 190, and 230 MeV showed a deviation of approximately 3% from the mean. The software we developed to analyze proton spot positions and widths provides an accurate analysis and reduces the time for analysis.

• 한국염색가공학회지
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• 제29권2호
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• pp.69-76
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• 2017

To get the proper treatment conditions, sulfonation reactions of persimmon tannin with sodium sulfite and sulfuric acid were proceeded in various settings, respectively. Also, the property changes were investigated by carrying out the additional analysis: elementary analysis and instrumental analysis using FT-IR, DSC, and TGA. The degree of $-SO_3Na$ substitutions appeared 0.216 and 0.208 under the treatment time of 3 hours and 6 hours, respectively and the degree of $-SO_3H$ substitutions indicated 0.200 and 0.167 under 9 hours and 18 hours, respectively by elemental analysis. In terms of the FT-IR spectras, there was a peak based on the bonds of pyran ring and ether in relation to non-treated and sulphonated tannin at $1,102cm^{-1}$. No peak was shown in the sulfited tannin. An absorption peak which was due to the $C{\rightarrow}O$ of secondary -OH group became evident in nontreated and sulfited tannin at $1,092cm^{-1}$ and $1,090cm^{-1}$, respectively but the same result was not found in sulphonated tannin. The results of TGA analysis of the sulfonated persimmon tannin showed that the sulfonation of it improved thermal properties.

• 한국산업융합학회 논문집
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• 제19권4호
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• pp.237-244
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• 2016

This paper investigates the possibility to increase the economic value of the thinned young apple trough fermentation process. It is studies the optimal fermentation condition of thinned young apple by manipulating preparation treatment and sugar content. To do this following steps are done. Firstly, different preparation treatment for thinned young apple such as whole apple, cutting apple, and blending apple were done. The different sugar content such as $24^{\circ}Brix$, $15^{\circ}Brix$ and $4^{\circ}Brix$ was added. Secondly, the sugar contents and pH level were measured during fermentation process. Finally, statistical analysis was used to examine the relation between the preparation treatment, sugar content and pH level during the fermentation process. The experimental result shows that the different preparation treatment influences to the fermentation process. The blending apple treatment gave lower pH level compared to other kind treatments. The sugar content of thinned young apple was decrease during the fermentation process. The statistical analysis shows that the manipulation preparation treatment and sugar content affect the final pH level and whole fermentation process. Experimental result shows that the thinned young apple fermentation could be proposed as new alternative product in the market. The best fermentation process was obtained from blending thinned young apple treatment with $24^{\circ}Brix$.

• 한국세라믹학회지
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• 제53권4호
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• pp.417-428
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• 2016

In this review, an attempt is made to calculate one-dimensional (1-D) electron density profiles from experimentally determined (00l) XRD intensities and possible structural models as well in an effort to understand the collective intracrystalline structures of intercalant molecules of two-dimensional (2-D) nanohybrids with heterostructures. 2-D ceramics, including layered metal oxides and clays, have received much attention due to their potential applicability as catalysts, electrodes, stabilizing agents, and drug delivery systems. 2-D nanohybrids based on such layered ceramics with various heterostructures have been realized through intercalation reactions. In general, the physico-chemical properties of such 2-D nanohybrids are strongly correlated with their heterostructures, but it is not easy to solve the crystal structures due to their low crystallinity and high anisotropic nature. However, the powder X-ray diffraction (XRD) analysis method is thought to be the most powerful means of understanding the interlayer structures of intercalant molecules. If a proper number of well-developed (00l) XRD peaks are available for such 2-D nanohybrids, the 1-D electron density along the crystallographic c-axis can be calculated via a Fourier transform analysis to obtain structural information about the orientations and arrangements of guest species in the interlayer space.

• 대한기계학회논문집A
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• 제38권6호
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• pp.585-592
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• 2014

본 논문에서는 도마뱀 로봇 설계를 위한 생체운동 모사 다물체 동역학 시뮬레이터가 개발되었다. 시뮬레이터에 사용된 다물체-기구 동역학 모델은 상용 소프트웨어인 RecurDyn 에 쿠반에놀 도마뱀의 모션 캡쳐 데이터와 Micro-CT 데이터를 적용하여 생성되었다. 다양한 도마뱀의 보행 운동 특성 해석을 위해서 생체운동 시뮬레이터는 궤적 생성모듈, 역기구학 모듈, 역동역학 모듈로 구성된다. 궤적생성 모듈은 도마뱀의 속도에 따른 척추운동과 발 궤적을 생성한다. 또한, 도마뱀 로봇 설계를 위해서 역기구학을 통한 관절 각도 계산과 그를 통한 역동역학 해석으로 이동속도에 대한 요구 조인트 구동력을 생성한다.

• Journal of Microbiology and Biotechnology
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• 제17권6호
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• pp.1045-1048
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• 2007

Two genes, dps encoding decaprenyl diphosphate synthase and dxs encoding 1-deoxy-D-xylulose 5-phosphate synthase, were isolated from Rhizobium radiobacter ATCC 4718. DNA sequencing analysis of the dps and dxs genes revealed an open reading frame of 1,077 bp and 1,920 bp, respectively. The heterologous expression in Escherichia coli BL21(DE3) was carried out in order to identify their functions. Recombinant E. coli BL21(DE3) harboring the dps gene produced $CoQ_{10}$ as well as $CoQ_8$ and $CoQ_9$, whereas E. coli harboring only the dxs gene produced more $CoQ_8$ compared with the wild-type E. coli. Additionally, the coexpression of dps and dxs genes in E. coli was carried out. The recombinant E. coli harboring only the dps gene produced $0.21{\pm}0.04\;mg/l$ of $CoQ_{10}$, whereas the coexpressed E. coli with dps and dxs genes produced $0.37{\pm}0.07\;mg/l$ of $CoQ_{10}$. HPLC analysis also showed that the $CoQ_{10}$ fraction (100% of the total CoQs distribution) was increased from $15.86{\pm}0.66%$ (only dps) to $29.78{\pm}1.80%$ (dps and dxs).

• Reproductive and Developmental Biology
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• 제33권1호
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• pp.41-48
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• 2009

Placenta is the main nutrition source for the fetus during pregnancy. Thus, it has a pivotal function in the pregnant process. Many functions of the placenta have been elucidated. An abnormal placenta is associated with a high rate of pregnancy failure in somatic cloned bovine. Differentially expressed genes (DEGs) were examined in a comparison between normal and cloned bovine placenta using annealing control primer (ACP)-based GeneFishing PCR. Using 120 ACPs, nearly 80 genes were identified and the fragments of 42 DEGs were sequenced. 38 of these genes were known genes and four were unknown. To determine the DEGs result, six target clones expressing on one-side of a normal and a clone placenta were selected. Through an analysis of the target genes using the real-time PCR, the expressing pattern was found to be somewhat different from the DEGs. Additionally, several genes appeared with the same expression pattern. Taken together, this suggests that the target genes would be essential for research into what influences the placental formative mechanisms during fetal development.