• Title/Summary/Keyword: quantification technique

Search Result 9, Processing Time 0.208 seconds

A Study on the View Plan of Courtyard Apartment (중정형 공동주택(아파트)의 조망계획에 관한 연구)

  • An, Kwang-Ho;Choi, Yong-Seok
    • Journal of the Architectural Institute of Korea Planning & Design
    • /
    • v.33 no.4
    • /
    • pp.3-10
    • /
    • 2017
  • This is a phased study of the development of the quantification technique of right of view which is the basis of the view plan. The quantification technique is verified through the courtyard apartment and to derive the basic basis of optimal layout and view plan. Based on the self-developed evaluation method, the quantification was evaluated by calculating the measurement point by the quantification technique. As a result of the calculation, the lower floor is more advantageous for the view than the high floor due to the difference of the view distance and the view angle. It is also necessary to set the reference by weight. The quantification technique method enables intuitive evaluation of meaningful view objects. Considering the view only, it is advantageous to arrange a living room facing the courtyard where the view is planned. On the other hand, sunshine is much affected by the self-shadowing. Therefore, in the case of an unfavorable household, it is necessary to plan the windows and the space to bring sunshine from outside.

Quantified Comparison of Work Characteristics for Musculoskeletal Hazards Assessment of Industrial Workers (생산직 근로자의 근골격계질환 위험성 평가를 위한 작업특성의 수량화 비교)

  • Lim, Hyeon-Kyo;Yun, Jong-Hun;Luo, Meiling
    • Journal of the Korean Society of Safety
    • /
    • v.27 no.3
    • /
    • pp.131-140
    • /
    • 2012
  • Though there might exist not a few differences between cyclic works and atypical works, many researchers have applied the same assessment techniques that used for repetitive works, which may result introduce bias in their conclusions. This research aimed to verify whether there exist non-negligible work characteristics and/or dissimilarity among works with different work nature and whether one of the most prevalent assessment techniques for assessing ergonomic hazards of musculoskeletal disorders, REBA, can be applied to atypical works. For a general hospital, an automobile repair shop, and two auto-part assembly plants which manufactures quite different parts, a questionnaire survey and field investigation and ergonomic assessment were carried out and analyzed statistically with reference to the 3rd Quantification technique. The results showed that there exist remarkable difference between physical factors in cyclic works and atypical non-cyclic works. As for repetitive work, body posture was significant factors affecting on musculoskeletal disorders while atypical works seemed to have none which implied that the necessity of taking psychosocial factors into account for assessment of hazards. Complain rate in repetitive works was highest shoulder, back, and neck or wrist in sequence. However, there existed no consistent trend in complain rate in atypical works. And, though weight of manufacturing objects was a common factor that can partly explain musculoskeletal complain, time duration was significant in atypical work whereas repeatability and body posture were significant in repetitive works. As being the results, to summarize, it could be said that application of conventional ergonomic assessment techniques regardless of repetitiveness would be fruitless, and that the necessity of a unique methodology focused on atypical non-cyclic works should not be neglected.

Dimension Reduction in Time Series via Partially Quanti ed Principal Componen (부분-수량화를 통한 시계열 자료 분석에서의 차원축소)

  • Park, J.A.;Hwang, S.Y.
    • The Korean Journal of Applied Statistics
    • /
    • v.23 no.5
    • /
    • pp.813-822
    • /
    • 2010
  • We investigate a possible achievement in dimension reduction of time series via partially quantified principal component. Partial quantification technique allows us in modeling to accommodate artificial variable(s) of practical importance which is defined subjectively by the data analyst. Suggested procedures are described and in turn illustrated in detail by analyzing monthly unemployment rates in Korea.

The Development of Quantification Technique for Brain In vivo Proton NMR Spectroscopy (뇌의 양성자 핵자기공명 분광학을 위한 정량화 방법 개발)

  • 강해진
    • Progress in Medical Physics
    • /
    • v.12 no.1
    • /
    • pp.31-39
    • /
    • 2001
  • NMR spectroscopy enables us to measure the molar concentration of the metabolites in the organisms, and this technique is the only method to measure the concentration non-invasively. The proton NMR spectroscopy has been used to study the biochemical changes in human as well as in animal brain. MRI uses the proton densities and its relaxation times for reconstructing images, but MRS gives the biochemical changes inside the body. NMR spectroscopy could provide the information which MRI and CT could not, and this makes NMR spectroscopy more useful in diagnosing diseases. This study was tried to develop the quantitation of the molar concentration of the metabolites in the brain using the proton MR spectroscopy. The spectra of each metabolites was obtained, and the proton MR spectra was obtained from the insula gray matter areas of the 16 volunteers. And this spectra was analyzed to estimated the molar concentrations of the metabolites in the region. The results showed the very similar to those of the others.

  • PDF

3D Measurement Method Based on Point Cloud and Solid Model for Urban SingleTrees (Point cloud와 solid model을 기반으로 한 단일수목 입체적 정량화기법 연구)

  • Park, Haekyung
    • Korean Journal of Remote Sensing
    • /
    • v.33 no.6_2
    • /
    • pp.1139-1149
    • /
    • 2017
  • Measuring tree's volume is very important input data of various environmental analysis modeling However, It's difficult to use economical and equipment to measure a fragmented small green space in the city. In addition, Trees are sensitive to seasons, so we need new and easier equipment and quantification methods for measuring trees than lidar for high frequency monitoring. In particular, the tree's size in a city affect management costs, ecosystem services, safety, and so need to be managed and informed on the individual tree-based. In this study, we aim to acquire image data with UAV(Unmanned Aerial Vehicle), which can be operated at low cost and frequently, and quickly and easily quantify a single tree using SfM-MVS(Structure from Motion-Multi View Stereo), and we evaluate the impact of reducing number of images on the point density of point clouds generated from SfM-MVS and the quantification of single trees. Also, We used the Watertight model to estimate the volume of a single tree and to shape it into a 3D structure and compare it with the quantification results of 3 different type of 3D models. The results of the analysis show that UAV, SfM-MVS and solid model can quantify and shape a single tree with low cost and high time resolution easily. This study is only for a single tree, Therefore, in order to apply it to a larger scale, it is necessary to follow up research to develop it, such as convergence with various spatial information data, improvement of quantification technique and flight plan for enlarging green space.

Sampling-based Approach for Seismic Probabilistic Risk Assessment (지진 확률론적 리스크 평가를 위한 샘플링기반 접근법)

  • Kwag, Shinyoung;Eem, Seunghyun;Park, Junhee;Choi, In-Kil
    • Journal of the Computational Structural Engineering Institute of Korea
    • /
    • v.33 no.2
    • /
    • pp.129-136
    • /
    • 2020
  • In this study, we develop a sampling-based seismic probabilistic risk assessment (SPRA) quantification technique that can accurately consider a partially dependent condition of component seismic fragility information. Specifically, the SPRA quantification method is proposed by combining the advantages of two representative methodologies: EPRI seismic fragility and JAERI seismic fragility input-based quantification. The most important feature of the proposed method is that it performs a SPRA using a sampling technique by transforming the EPRI seismic fragility input into JAERI seismic fragility input. When the proposed sampling-based approach was applied to an example of simple system and to a SPRA problem of a nuclear power plant, it was observed that the proposed method yields approximately similar system seismic fragility and seismic risk results as those of the exact solution. Therefore, it is believed that the approach proposed in this study can be used as a useful tool for accurately assessing seismic risks, considering the partial seismic dependence among the components; the existing SPRA method cannot handle such partial dependencies.

Evaluation of Biocompatibility of Extracorporeal Circuit - Development of a Quantification Technique using in-vivo Injection of Tc99m Radioactive Platelets - (체외순환도관의 혈액적합성 평가 - 방사선 동위원소(Tc99m) 활성화 혈소판의 생체 내 주입을 이용한 정량분석법의 개발 -)

  • Lee, Sung-Ho;Sun, Kyung;Choi, Jai-Geol;Son, Ho-Sung;Jung, Jae-Seung;Ahn, Sang-Soo;Oh, Hye-Jung;Lee, Whan-Sung;Lee, Hye-Won;Kim, Kwang-Taik;Jeong, Yoon-Seop;Kim, Young-Ha;Kim, Hyoung-Mook
    • Journal of Chest Surgery
    • /
    • v.35 no.3
    • /
    • pp.171-176
    • /
    • 2002
  • Background: Blood-foreign interaction cause activation of coagulation and inflammatory process that may lead to multiorgan dysfunction and determine the surgical outcomes. Of the methods for assessing the biocompatibility, the platelet adhesion study is considered as the most valuable evaluation step in blood-foreign interaction. As the most studies have used in-vitro or ex-vivo conditions, we have developed a technique of quantification for platelet adhesion on the blood contact surface by using in-vivo injection of radioactive platelets. Material and Method: A coupled bypass circuit was designed to connect the proximal and descending thoracic aorta in 6 piglets(20∼25 Kg). One side of the circuit tube was consisted of a heparin coated PVC tube(10mm in ID, n=6, Experimental group), and the other, a non-heparin coated PVC tube(10mm in ID, n=6, Control group). After cannulation, the blood was circulated through the circuit for 2 hours. Platelet concentrate was prepared from homologous pig blood 24 hours before the experiment. The platelet concentrate was incubated with Tc-99m-HMPAO for 30 min and then centrifuged for 10 min. The supernatant was discarded and the radio-labeling efficacy was measured. The radio-labeled platelet concentrate was mixed with the autologous plasma to make the volume 5 ml, and the mixture was injected intravenously into the experimental animal. After 2 hour circulation, 5 pieces of the specimen(10mm in length each) were obtained from each PVC tube. The radioisotopes were counted with a gamma counter(Cobra ll, Packard, USA), and the ratio of radioisotope count was compared between the control and experimental group. Result: The radioisotope count number was 537.3221.1 Ci/min in the control group and 311.1 184.5 Ci/min in the experimental group(p=0.0104). The ratio between the groups was 1 to 0.58 (p=0.004). Conclusion: In vivo quantification using technetium-99m-HMPAO labeled platelets is simple and reproducible in evaluating platelet adhesion on a foreign surface. We suggest this technique to be a useful tool for blood compatibility test.

Measurement and Assessment of Absolute Quantification from in Vitro Canine Brain Metabolites Using 500 MHz Proton Nuclear Magnetic Resonance Spectroscopy: Preliminary Results (개의 뇌 조직로부터 추출한 대사물질의 절대농도 측정 및 평가: 500 MHz 고자장 핵자기공명분광법을 이용한 예비연구결과)

  • Woo, Dong-Cheol;Bang, Eun-Jung;Choi, Chi-Bong;Lee, Sung-Ho;Kim, Sang-Soo;Rhim, Hyang-Shuk;Kim, Hwi-Yool;Choe, Bo-Young
    • Investigative Magnetic Resonance Imaging
    • /
    • v.12 no.2
    • /
    • pp.100-106
    • /
    • 2008
  • The purpose of this study was to confirm the exactitude of in vitro nuclear magnetic resonance spectroscopy(NMRS) and to complement the defect of in vivo NMRS. It has been difficult to understand the metabolism of a cerebellum using in vivo NMRS owing to the generated inhomogeneity of magnetic fields (B0 and B1 field) by the complexity of the cerebellum structure. Thus, this study tried to more exactly analyze the metabolism of a canine cerebellum using the cell extraction and high resolution NMRS. In order to conduct the absolute metabolic quantification in a canine cerebellum, the spectrum of our phantom included in various brain metabolites (i.e., NAA, Cr, Cho, Ins, Lac, GABA, Glu, Gln, Tau and Ala) was obtained. The canine cerebellum tissue was extracted using the methanol-chloroform water extraction (M/C extraction) and one group was filtered and the other group was not under extract processing. Finally, NMRS of a phantom solution and two extract solution (90% D2O) was progressed using a 500MHz (11.4 T) NMR machine. Filtering a solution of the tissue extract increased the signal to noise ratio (SNR). The metabolic concentrations of a canine cerebellum were more close to rat’s metabolic concentration than human’s metabolic concentration. The present study demonstrates the absolute quantification technique in vitro high resolution NMRS with tissue extraction as the method to accurately measure metabolite concentration.

  • PDF