• International Journal of Precision Engineering and Manufacturing
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• 제3권2호
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• pp.5-14
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• 2002

Internet becomes very common tool far communication and data sharing. Virtual readily(VR) on web browser, and virtual prototyping and virtual manufacturing is widely used in many engineering fields. The reduction of overall development process and error minimization during data conversion becomes very crucial where sharing data via Internet and VR. This paper deals with the advantage and disadvantage of VRML format used in RP(Rapid Prototyping), and a software for RP data preparation is developed. If VRML format as an international standard for VR, is replaced with STL format, the weak points of STL formal can be overcome and the technique related to virtual prototyping and virtual manufacturing can be addressed more systematically by sharing the data. The system developed in this work shows a good window to get access to a mare realistic observation of an object for an RP system from a long remote sites in a more systematic way.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.15-26
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• 2004

The calibration for systematic error in LiDAR is crucial for the accuracy of airborne laser scanning. The main error is the misalignment of platforms between INS(Inertial Navigation System) and Laser scanner For planimetrical calibration of LiDAR, the building is good feature which has great changes in height and continuous flat area in the top. The planimetry error(pitch, roll) is corrected by adjustment of height which is calculated from comparing ground control points(GCP) of building to laser scanning data. We can know scale correction of laser range by the comparison of LiDAR data and GCP is arranged at the end of scan angle where maximize the height error. The area for scale calibration have to be large flat and have almost same elevation. At 1000m for average flying height, The Accuracy of laser scanning data using LiDAR is within 110cm in height and ${\pm}$50cm in planmetry so we can use laser scanning data for generating 3D terrain surface, expecically digital surface model(DSM) which is difficult to measure by aerial photogrammetry in forest, coast, urban area of high buildings

• 한국경제지리학회지
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• 제9권2호
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• pp.261-272
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• 2006

본고는 캐나다의 도시권 획정을 고찰하였다. 구체적으로 캐나다 통계청(Statistics Canada)이 센서스 연도마다 정의하는 Census Metropolitan Area/census Agglomeration(CMA/CA)에 초점을 맞추었다. CMA/CA의 획정은 도시지역의 공간적 정의를 위한 밀도접근, 토지이용 접근, 기능지역 접근 중에서 기능지역 접근에 근거한다. 그러나 CMA/CA는 그 획정과정에서 밀도접근 및 토지이용접근을 토대로 캐나다 통계청이 정의하는 등질지역으로서의 도시지역(Urban Area, UA)을 활용한다는 특성을 갖는다. 실제로 인구 10,000명 이상의 UA는 CMA/CA의 중심부가 된다. 캐나다의 CMA/CA 고찰을 통해, 본고는 우리나라 도시권 획정에 고려할만한 주요사항을 제시하였다.

• 대한기계학회논문집A
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• 제26권5호
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• pp.851-863
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• 2002

Recent industrial requirements for highly precise shape processing have brought the electric discharge machining (EDM) in great need. High precision in EDM is primarily achieved by high performance controllers. However there exists inherent precision loss due to structural micro-deformation. On this background, we study structural deformation characteristics of wire cut EDM via finite element (FE) analysis and axiomatic design. Two different wire cut EDMs are selected as analysis models. 3D CAD package I-Deas is first used to construct FE models of wire cut EDMs, and then ABAQUS FE code is used for following structural analysis. Pertinency of FE mesh refinement is discussed in terms of η -factor. It is shown that performance accuracy of EDM depends strongly on the structural characteristics. Some design enhancements are suggested in an axiomatic design point of view. Finally we provide weight and temperature induced displacement discrepancies between wire end points as position functions of each subframe.

• 한국간호교육학회지
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• 제19권2호
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• pp.151-162
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• 2013

Purpose: This study was to deduce the changes of communication style and relationship patterns via self-analysis after Satir communication education for undergraduate nursing students. Methods: Thirty seven students participated in this study. The age of participants was 20 ~ 22 years and all of them were female students. Before the first semester and after the last class in 2011, we collected an evaluation from students of how their own communication style and relationship patterns changed. Using qualitative content analysis method, the data were analyzed. Results: After qualitative contents analysis, five change-related themes and 16 experience-related subjects emerged. Five themes were from self-contentment to discreet, from behavior of speaking and listening to understanding, from agreement to empathy, from your fault to my fault, and from feeling emotion to expressing emotion. Conclusion: From the results of this study, we found the essential points of changes for communication and relation ship experiences after Satir communication education and self-reflection could reinforce change in undergraduate nursing students' experiences.

• BMB Reports
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• 제47권8호
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• pp.424-432
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• 2014

The defining feature of Parkinson's disease is a progressive and selective demise of dopaminergic neurons. A recent report on Parkinson's disease animal model demonstrates that poly (ADP-ribose) (PAR) dependent cell death, also named parthanatos, is accountable for selective dopaminergic neuronal loss. Parthanatos is a programmed necrotic cell death, characterized by PARP1 activation, apoptosis inducing factor (AIF) nuclear translocation, and large scale DNA fragmentation. Besides cell death regulation via interaction with AIF, PAR molecule mediates diverse cellular processes including genomic stability, cell division, transcription, epigenetic regulation, and stress granule formation. In this review, we will discuss the roles of PARP1 activation and PAR molecules in the pathological processes of Parkinson's disease. Potential interaction between PAR molecule and Parkinson's disease protein interactome are briefly introduced. Finally, we suggest promising points of therapeutic intervention in the pathological PAR signaling cascade to halt progression in Parkinson's disease.

• 대한기계학회논문집A
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• 제39권7호
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• pp.653-657
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• 2015

표면확산계수의 활성화를 통한 실리콘-게르마늄(silicon-germanium) 양자점의 성장을 수치해석적으로 구현하였다. 실리콘 기판 위에 증착된 실리콘-게르마늄 박막의 성장을 표현하는 비선형 지배방정식을 유도하였으며, 확산계수를 온도의 함수로 고려하여 표면확산계수의 국소적 향상이 미치는 효과를 살펴보았다. 해석결과는 안정상태의 박막이 섭동될 때에 양자점이 자기조립되는 과정을 보여주며, 박막표면의 국소부위에 선택적으로 구조물이 성장하는 현상을 나타낸다. 본 연구는 바텀업(bottom-up) 방식이 내재적으로 지닌 불규칙성을 해결할 대안을 마련하여 양자기기를 위한 공정개발의 방향을 제시한다.

• 한국식생활문화학회지
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• 제26권6호
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• pp.709-716
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• 2011

The principal objective of this study was to evaluate the quality characteristics of dried noodles when different concentrations of Loquat (Eriobotyya japonica Lindley) leaf powder (LLP) were added to the wheat flour. The cooking quality, mechanical texture properties, and viscosity were measured, and a sensory evaluation was conducted with the prepared noodles. The gelatinization points of the composite LLP-wheat flours were shown to increase. As measured via amylograph, viscosity at $95^{\circ}C$, viscosity at $95^{\circ}C$ after 15 minutes, and maximum viscosity values of those samples decreased as the LLP content increased. As increasing amounts of LLP were added, the L and a values were reduced, whereas the b value was increased and the color values, weight, and volume of the cooked noodle increased, as did the turbidity of the soup. With regard to the textural characteristics, the LLP additive increased hardness and cohesiveness, and reduced adhesiveness and springiness. Overall, the noodles prepared with 5% LLP were preferred more than the others, according to the results of our sensory evaluation.

• JSTS:Journal of Semiconductor Technology and Science
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• 제1권4호
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• pp.209-215
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• 2001

In this paper a method for analysis and modelling of coplanar transmission interconnect lines that are placed on top of silicon-silicon oxide substrates is presented. The potential function is expressed by series expansions in terms of solutions of the Laplace equation for each homogeneous region of layered structure. The expansion coefficients of different series are related to each other and to potentials applied to the conductors via boundary conditions. In the plane of conductors, boundary conditions are satisfied at $N_d$ discrete points with $N_d$ being equal to the number of terms in the series expansions. The resulting system of inhomogeneous linear equations is solved by matrix inversion. No iterations are required. A discussion of the calculated line admittance parameters as functions of width of conductors, thickness of the layers, and frequency is given. The interconnect capacitance and conductance per unit length results are given and compared with those obtained using full wave solutions, and good agreement have been obtained in all the cases treated

• 복식문화연구
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• 제28권2호
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• pp.181-198
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• 2020

Using the developed wedding planner selection criteria scale, this study examined whether wedding planner selection criteria differ according to consumer characteristics such as demographic characteristics and wedding preparation behaviors. The main survey for this study was conducted via the Internet with 295 consumers aged 20-30 living in the Seoul metropolitan area. The data collected from the survey processed and analyzed using the statistical programs SPSS 21.0 t-test. Analyzing how wedding planner selection criteria differ according to consumers' demographic characteristics and wedding preparation behaviors, results shown for the wedding planner selection criteria were all four points on average except for individual characteristics and important sub-factors regardless of the consumers' characteristics, and various results were derived depending on the consumers' characteristics. This study has various practical implications in that it verified the difference in wedding planner selection criteria according to consumer characteristics and determined how much money consumers were willing to play for wedding planners. It is recommended that future studies take various approaches to investigate how wedding planner users are satisfied with or place importance on wedding planner services and conduct empirical using the selection criteria developed in this study to compare influential variables that affect behavior intention and willingness to pay according to consumer type.