• 제목/요약/키워드: Safety Vector

검색결과 278건 처리시간 0.026초

Line of Sight Vector Estimation using UWB for Augmented Reality Based Indoor Location Monitoring System

  • Chun, Sebum;Seo, Jae-Hee;Lee, Sangwoo;Heo, Moon-Beom
    • Journal of Positioning, Navigation, and Timing
    • /
    • 제5권3호
    • /
    • pp.145-156
    • /
    • 2016
  • A variety of methods for indoor positioning systems have been underway to ensure the safety of emergency rescuers who are working in dangerous situations such as fire fighters. However, since most systems display locations of rescue workers in two-dimension (2D)-based maps, it is difficult for a commander located in the outside to recognize locations of rescuers inside the building intuitively. An augmented reality (AR)-based indoor positioning monitoring system can display locations of rescuer inside the building that can be seen by commanders to help intuitive recognition of positioning. To monitor AR-based indoor positioning, it is necessary to have an estimation technique of line of sight vector of observers. In the present study, an estimation technique of a line of sight vector using ultra-wide band tranceiver installed inside the indoor to trace locations is presented.

아데노바이러스 유전자치료제의 독성 (Toxicity of the Adenoviral Vector Mediated Gene Therapy)

  • 정인재
    • Environmental Analysis Health and Toxicology
    • /
    • 제24권1호
    • /
    • pp.71-77
    • /
    • 2009
  • Adenoviral vector(AdV) has been the most widely used viral vector for delivering an exogenous therapeutic gene to human. As of this date, more clinical trials utilize recombinant AdV to treat cancer and monogenic inherited disease as well as vaccine applications. However, the number of clinical trials had dropped markedly following the tragic death of a patient ongoing an AdV therapy for the treatment of an ornithine transcarbamylase deficiency(OTCD). This review is an attempt to provide the information on toxicity generated by AdVmediated gene transfer. It would serve as a sobering reality to researchers and clinicians exploring the use of AdV, as to the complications involved in human application.

불연속면의 최대경사벡터를 활용한 사면거동해석 (Analysis of Rock Slope Behavior Utilizing the Maximum Dip Vector of Discontinuity Plane)

  • 조태진
    • 터널과지하공간
    • /
    • 제29권5호
    • /
    • pp.332-345
    • /
    • 2019
  • 평사투영도에서 불연속면을 대표하는 유일한 점으로 정의되는 최대경사벡터를 해당 면의 경사와 경사방향에 의거하여 형성하였다. 평사투영해석에서 평면의 극점이 대원과 역방향에 제도되는 것에 비해 최대경사벡터는 대원의 최대 경사지점에 위치하여 불연속면의 미끄러짐 방향을 직접 투영도 상에서 지시한다. 투영도 상에서 불연속면의 거동방향을 직접적으로 지시하는 최대경사벡터를 활용하여 평면 및 전도파괴 양상을 직관적으로 확인하였다. 특히 평면 파괴의 경우 블록의 옆면을 형성하는 고 경사 절리의 존재를 확인하여 실제 미끄러짐 블록의 형성가능성을 산정하였다. 또한 사면 방향과 반대방향을 갖는 고경사절리들의 존재를 확인하여 3각형 단면을 갖는 미끄러짐 블록의 형성여부를 판별하고 안전율을 도출하였으며, 4각형 단면을 갖는 가장 취약한 블록의 안전율과 비교분석하였다. 쐐기파괴 경우에는 절리면 교차에 의해 형성되는 쐐기의 기저선 방향이 최대경사벡터 속성을 지니고 있어 쐐기파괴 영역을 평면 및 전도파괴 영역이 제도된 투영도 상에 함께 도시하여 분석을 수행하였다. 특히 쐐기 상부 면을 형성하는 절리를 추출할 수 있어 전체 쐐기형상을 추정하고 역학적 거동분석을 수행하는데 요구되는 쐐기의 기하학적 특성자료를 도출하는 토대를 확립하였다.

항적 데이터 학습을 통한 추천 항로 구성에 관한 연구 (Composing Recommended Route through Machine Learning of Navigational Data)

  • 김주성;정중식;이성용;이은석
    • 한국항해항만학회:학술대회논문집
    • /
    • 한국항해항만학회 2016년도 춘계학술대회
    • /
    • pp.285-286
    • /
    • 2016
  • 해상교통관제센터에 의해 실시간으로 수집되는 선박의 항해 데이터를 바탕으로 선박 항적 패턴 인식을 수행하고 이를 바탕으로 항적 모델을 추출하여 사전에 선위를 예측하는 기법을 제안한다. 항적 데이터의 처리와 가공, 항적 모델링을 위하여 Support Vector Regression 알고리즘이 사용되었으며, 적정 파라미터 선정을 위하여 k-fold cross validation과 grid search가 사용되었다. 제안된 항적 데이터 모델링 기법을 통하여 사전에 선박의 선위를 예측하여 해상교통과제사의 의사결정을 지원하고자 한다.

  • PDF

Structural health monitoring data reconstruction of a concrete cable-stayed bridge based on wavelet multi-resolution analysis and support vector machine

  • Ye, X.W.;Su, Y.H.;Xi, P.S.;Liu, H.
    • Computers and Concrete
    • /
    • 제20권5호
    • /
    • pp.555-562
    • /
    • 2017
  • The accuracy and integrity of stress data acquired by bridge heath monitoring system is of significant importance for bridge safety assessment. However, the missing and abnormal data are inevitably existed in a realistic monitoring system. This paper presents a data reconstruction approach for bridge heath monitoring based on the wavelet multi-resolution analysis and support vector machine (SVM). The proposed method has been applied for data imputation based on the recorded data by the structural health monitoring (SHM) system instrumented on a prestressed concrete cable-stayed bridge. The effectiveness and accuracy of the proposed wavelet-based SVM prediction method is examined by comparing with the traditional autoregression moving average (ARMA) method and SVM prediction method without wavelet multi-resolution analysis in accordance with the prediction errors. The data reconstruction analysis based on 5-day and 1-day continuous stress history data with obvious preternatural signals is performed to examine the effect of sample size on the accuracy of data reconstruction. The results indicate that the proposed data reconstruction approach based on wavelet multi-resolution analysis and SVM is an effective tool for missing data imputation or preternatural signal replacement, which can serve as a solid foundation for the purpose of accurately evaluating the safety of bridge structures.

Support vector ensemble for incipient fault diagnosis in nuclear plant components

  • Ayodeji, Abiodun;Liu, Yong-kuo
    • Nuclear Engineering and Technology
    • /
    • 제50권8호
    • /
    • pp.1306-1313
    • /
    • 2018
  • The randomness and incipient nature of certain faults in reactor systems warrant a robust and dynamic detection mechanism. Existing models and methods for fault diagnosis using different mathematical/statistical inferences lack incipient and novel faults detection capability. To this end, we propose a fault diagnosis method that utilizes the flexibility of data-driven Support Vector Machine (SVM) for component-level fault diagnosis. The technique integrates separately-built, separately-trained, specialized SVM modules capable of component-level fault diagnosis into a coherent intelligent system, with each SVM module monitoring sub-units of the reactor coolant system. To evaluate the model, marginal faults selected from the failure mode and effect analysis (FMEA) are simulated in the steam generator and pressure boundary of the Chinese CNP300 PWR (Qinshan I NPP) reactor coolant system, using a best-estimate thermal-hydraulic code, RELAP5/SCDAP Mod4.0. Multiclass SVM model is trained with component level parameters that represent the steady state and selected faults in the components. For optimization purposes, we considered and compared the performances of different multiclass models in MATLAB, using different coding matrices, as well as different kernel functions on the representative data derived from the simulation of Qinshan I NPP. An optimum predictive model - the Error Correcting Output Code (ECOC) with TenaryComplete coding matrix - was obtained from experiments, and utilized to diagnose the incipient faults. Some of the important diagnostic results and heuristic model evaluation methods are presented in this paper.

Safety evaluation of gene therapy - a case study of naked DNA product

  • Ahn, Byung-Ok
    • 한국독성학회:학술대회논문집
    • /
    • 한국독성학회 2003년도 추계학술대회
    • /
    • pp.86-86
    • /
    • 2003
  • Gene therapy is a medical intervention based on modification of the genetic material of living cells. Gene transfer usually conducted using bacterial plasmid DNA and/or virus vector to express a specific protein. Gene transfer medicinal products classified as naked nucleic acid, complexed nucleic acid or non-viral vectors, viral vector, and genetically modified cells according to biological origin.(omitted)

  • PDF

Estimation of Human Flavin-containing Monooxygenases Activity(FMO1) in the Baculovirus Expression Vector System by using S-oxidation of Methimazole

  • Kim, Young-Mi
    • 한국식품위생안전성학회지
    • /
    • 제14권4호
    • /
    • pp.415-421
    • /
    • 1999
  • The flavin-containing monooxygenases (FMOs) (EC 1.14. 13.8) are NADPH-dependent flavoenzymes that catalyze oxidation of soft nucleophilic heteroatom centers in a range of structurally diverse compounds including foods, drugs, pesticides, and other xenobiotics. In humans, FMOl appears to be the predominant form expressed in human fetal liver. cDNA-expressed human FMO and human liver microsomal FMO have been observed to N- and S-oxy-genate nucleophilic nitrogen- and sulfur-containing drugs and chemicals, respectively. In the present study, FMOl can be expressed in the baculovirus expression vector system at level of 2.68 nmol FMOl/mg of membrane protein. This isoform was examined for its capacity to metabolize methimazole to its S-oxide using thiocholine assay. Kinetic studies of its S-oxide by recombinant human FMO1 result in Km of 7.66 $\mu$M and Vmax of 17.79 nmol/min/mg protein.

  • PDF

약계자 영역에서 SynRM의 최대 토크제어를 위한 센서리스 벡터제어 (Sensorless Vector Control for Maximum Torque of SynRM in the Field Weakening Region)

  • 이정철;정동화
    • 한국안전학회지
    • /
    • 제17권2호
    • /
    • pp.32-38
    • /
    • 2002
  • In this paper, a new approach for the SynRM(Synchronous Reluctance Motor) control which ensures producing MTPA(Maximum Torque per Ampere) over the entire field weakening region is presented. In addition, this paper presents a speed sensorless control scheme of SynRM using flux observer. Also, by adjusting the base speed for the field weakening operation according to the flux level, the current and voltage limit, the smooth and precise transition into the field weakening operation can be achieved. The validity of the proposed scheme is verified through simulation.

MPC5554를 이용한 HEV용 IPMSM 벡터제어 (IPMSM Vector Control using MPC5554 for HEV)

  • 문정송;이정효;하인용;원충연
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2010년도 춘계학술대회 논문집
    • /
    • pp.213-219
    • /
    • 2010
  • MCU(Micro Controller Unit) used for the automobiles has been required for improving of the safety and high reliability. Also, the necessity of high performance MCU equipped with high fuel-efficiency has been risen according to increased requests of high fuel-efficiency and improving the occupants safety with the development of intelligent vehicles and future vehicles. The MPC5554 32-bit embedded controller, made by Freescale Semiconductor, specialized in the part of the power train provides the high reliability, fast interrupt process and real-time control. In This paper, the investigation on IPMSM using MPC5554 has been performed. Also SVPWM(Space Vector Pulse Width Modulation) is implemented to the servo system.

  • PDF