• Title, Summary, Keyword: Integrity

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Guaranteed GNSS-based Road Charging Applications through User-Level Integrity

  • Mark, Audrey;Schortmann, Joaquin Cosmen;Olague, Miguel Angel Martinez;Merino, Miguel Romay
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.2
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    • pp.77-82
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    • 2006
  • Integrity plays a fundamental role in the feasibility of 'liability critical' applications. Road charging, e.g. road tolling in urban zones or on highways, represents a series of liability critical applications where a guarantee in integrity could be a true enabler: being the mechanism that prevents the incorrect charging of users and enabling the advancement of these applications using GNSS such as Galileo and EGNOS that provide integrity mechanisms. However, the integrity of the end user position is not guaranteed by the EGNOS and Galileo integrity services alone as provided. Algorithms have been developed to supply a guarantee on the performance attainable at the user level through the provision of a horizontal protection level that responds to local user conditions such as multipath or interference. In addition, an application has been developed that implements road charging mechanisms based on the availability of user-level integrity. Results obtained show that the user-level integrity algorithms provided the required level of integrity guarantee and granularity of the horizontal protection levels necessary for executing urban and rural (highway) road charging. In addition, the road charging application developed shows that the current application domain requirements can be met through the provision of guaranteed integrity and that further reductions in the horizontal protection levels along with increased signal availability will enable future road charging modalities.

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Analysis Method of Signal Integrity for Mobile Display Circuit Modules (모바일 디스플레이 회로 모듈의 시그널 인티그리티 해석 기법)

  • Lee, Yong-Min
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.46 no.4
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    • pp.64-69
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    • 2009
  • This paper addresses the simulation methodology of signal integrity and power integrity for mobile display modules. The proposed technique can be applied to analyse a circuit module which consist of connector, FPCB and driver ICs. The recent demand of serial interconnection technology in the mobile display industry needs delicate impedance control of signal and power traces to prohibit system malfunctioning and to reduce electromagnetic field radiation. Based on the S-parameter and Z-parameter analysis, we analyse the correlation between frequency-domain and time-domain measurements. With multi-port macros, signal integrity can be included in power integrity analysis in time domain.

Study on Evaluation of Structural Integrity for Small Aircraft Tail (소형 항공기 미익부 구조 건전성 평가에 관한 연구)

  • Lee, Muhyoung;Park, Illkyung;Kim, Sungjoon;Ahn, Sukmin
    • Journal of Aerospace System Engineering
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    • v.6 no.2
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    • pp.28-34
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    • 2012
  • Structural integrity evaluation is important item in the aircraft certification. Recently, it is designed for limit load, material weakness about fatigue and corrosion, damage by bird strike in flight to evaluate structural integrity of aircraft. And static/fatigue analysis are performed to secure structural integrity, it was verified by static and fatigue tests. To evaluate the structural integrity of small aircraft tail, structural integrity was calculated by the finite element analysis. In the present study, finite element analysis are performed to pick out load cases in flight occurrence, and secure margin of safety to evaluate structural integrity of KC-100 tail unit. The proprieties of finite element analysis results are compared with the static structure test results. The estimation process of structural integrity for small aircraft tail may help the design.

Overview of 3-D IC Design Technologies for Signal Integrity (SI) and Power Integrity (PI) of a TSV-Based 3D IC

  • Kim, Joohee;Kim, Joungho
    • The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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    • v.24 no.2
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    • pp.3-14
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    • 2013
  • In this paper, key design issues and considerations for Signal Integrity(SI) and Power Integrity(PI) of a TSV-based 3D IC are introduced. For the signal integrity and power integrity of a TSV-based 3-D IC channel, analytical modeling and analysis results of a TSV-based 3-D channel and power delivery network (PDN) are presented. In addition, various design techniques and solutions which are to improve the electrical performance of a 3-D IC are investigated.

Extenuating Food Integrity Risk through Supply Chain Integration: The Case of Halal Food

  • Ali, Mohd Helmi;Tan, Kim Hua;Pawar, Kulwant;Makhbul, Zafir Mohd
    • Industrial Engineering and Management Systems
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    • v.13 no.2
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    • pp.154-162
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    • 2014
  • Effects of food scandals on religious belief, human health and even on causes of death indicate that firms and consumers are vulnerable to integrity risks in the global supply chain. Mitigating the integrity risk and maintaining the credence quality products like halal food is very challenging, if not impossible. Our aim in this research is to show that supply chain integration can mitigate the halal food integrity risk. To illustrate this idea, we have conducted case studies and interviews in seven Malaysian chicken supply chain focal firms. We unpack the halal integrity risks along the supply chain, such as production risk, raw material risk, food security risk, outsourcing practices risk, service risk, and logistics risk. The research argues that supply chain integration, such as internal integration and external integration practices, could minimize the halal integrity risk. The advantages of supply chain integration in mitigating the halal integrity risk are also highlighted in this paper.

The Effect of Corporate Integrity on Stock Price Crash Risk

  • YIN, Hong;ZHANG, Ruonan
    • The Journal of Business Economics and Environmental Studies
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    • v.10 no.1
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    • pp.19-28
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    • 2020
  • Purpose: This research aims to investigate the impact of corporate integrity on stock price crash risk. Research design, data, and methodology: Taking 1419 firms listed in Shenzhen Stock Exchange in China as a sample, this paper empirically analyzed the relationship between corporate integrity and stock price crash risk. The main integrity data was hand-collected from Shenzhen Stock Exchange Website. Other financial data was collected from CSMAR Database. Results: Findings show that corporate integrity can significantly decrease stock price crash risk. After changing the selection of samples, model estimation methods and the proxy variable of stock price crash risk, the conclusion is still valid. Further research shows that the relationship between corporate integrity and stock price crash risk is only found in firms with weak internal control and firms in poor legal system areas. Conclusions: Results of the study suggest that corporate integrity has a significant influence on behaviors of managers. Business ethics reduces the likelihood of managers to overstate financial performance and hide bad news, which leads to the low likelihood of future stock price crashes. Meanwhile, corporate integrity can supplement internal control and legal system in decreasing stock price crash risks.

Improvement of Noise Characteristics by Analyzing Power Integrity and Signal Integrity Design for Satellite On-board Electronics (위성용 전장품 탑재보드의 Power Integrity 및 Signal Integrity 설계 분석을 통한 노이즈 성능 개선)

  • Cho, Young-Jun;Kim, Choul-Young
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.48 no.1
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    • pp.63-72
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    • 2020
  • As the design complexity and performances are increased in satellite electronic board, noise related problems are also increased. To minimize the noise issues, various design improvements are performed by power integrity and signal integrity analysis in this research. Static power and dynamic power design are reviewed and improved by DC IR drop and power impedance analysis. Signal integrity design is reviewed and improved by time domain signal wave analysis and PCB(Printed Circuit Board) design modifications. And also power planes resonance modes are checked and mitigation measures are verified by simulation. Finally, it is checked that radiated noise is reduced after design improvements by EMC(Electro Magnetic Compatibility) RE(Radiated Emission) measurement results.

Development of a RVIES Syetem for Reactor Vessel Integrity Evaluation (원자로용기 건전성평가를 위한 RVIES 시스템의 개발)

  • Lee, Taek-Jin;Choe, Jae-Bung;Kim, Yeong-Jin;Park, Yun-Won;Jeong, Myeong-Jo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.8
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    • pp.2083-2090
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    • 2000
  • In order to manage nuclear power plants safely and cost effectively, it is necessary to develop integrity evaluation methodologies for the main components. Recently, the integrity evaluation techniques were broadly studied regarding the license renewal of nuclear power plants which were approaching their design lives. Since the integrity evaluation process requires special knowledges and complicated calculation procedures, it has been allowed only to experts in the specified area. In this paper, an integrity evaluation system for reactor pressure vessel was developed. RVIES(Reactor Vessel Integrity Evaluation System) provides four specific integrity evaluation procedures covering PTS(Pressurized Thermal Shock) analysis, P-T(Pressure-Temperature) limit curve generation, USE(Upper Shelf Energy) analysis and Fatigue analysis. Each module was verified by comparing with published results.

The Design and Implementation of HTML Document Integrity Management System (HTML 문서의 무결성 유지 시스템의 설계 및 구현)

  • 조이기;이영운;황인문;양수영;김원중
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.380-383
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    • 2002
  • It Is difficult to manage broken link with dangling reference, inaccurate reference m the manual site that is consist of HTML documents of much quantity as KLDP(Korean Linux Documentation Project, http:/ /kldp.org) Web site. In this paper. we define relationship and constrain renditions that exist between Web site's HTML documents. And we design and implement HIMS(HTML Document Integrity Management System), which notify user that integrity violation happens or launch trigger operation to keep integrity between HTML documents in case of insert, delete, update.

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