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A Decision Support Methodology for Remediation Planning of Concrete Bridges

  • Rashidi, Maria;Lemass, Brett
    • Journal of Construction Engineering and Project Management
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    • v.1 no.2
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    • pp.1-10
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    • 2011
  • Bridges are critical and valuable components in any road and rail transportation network. Therefore bridge remediation has always been a top priority for asset managers and engineers, but identifying the nature of true defect deterioration and associated remediation treatments remains a complex task. Nowadays Decision Support Systems (DSS) are widely used to assist decision makers across an extensive spectrum of unstructured decision environments. The main objective of this research is to develop a requirements-driven methodology for bridge monitoring and maintenance which has the ability to assess the bridge condition and find the best remediation treatments using Simple Multi Attribute Rating Technique (SMART); with the aim of maintaining a bridge within acceptable limits of safety, serviceability and sustainability.

Some Finite Integrals Involving The Product of Srivastava's Polynomials and A Certain $\bar{H}$-Function with Applications

  • Singh, Yashwant;Garg, Atul
    • Kyungpook Mathematical Journal
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    • v.48 no.2
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    • pp.165-171
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    • 2008
  • The aim of this paper is to evaluate four finite integrals involving the product of Srivastava's polynomials, a generalized hypergeometric function and $\bar{H}$-function proposed by Inayat Hussian which contains a certain class of Feynman integrals. At the end, we give an application of our main findings by connecting them with the Riemann-Liouville type of fractional integral operator. The results obtained by us are basic in nature and are likely to find useful applications in several fields notably electric networks, probability theory and statistical mechanics.

A Study on the Application of Ecological Structural Dynamic Modelling (생태 모델링기법으로서 동적구조모형의 고찰)

  • Kim, Jwa-Kwan
    • Journal of Environmental Impact Assessment
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    • v.13 no.4
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    • pp.213-222
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    • 2004
  • Exergy is defined as the amount of work (entropy-free energy) a system can perform when it is brought into thermodynamic equilibrium with its environment. Exergy measures the distance from the inorganic soup in energy terms. Therefore, exergy can be considered as fuel for any system that converts energy and matter in a metabolic process. The aim of this study is to introduce structural dynamic modelling which is based on maximum exergy principle. Especially, almost ecological models couldn't explain algal succession until now. New model (structural dynamic model) is anticipated to predict or explain the succession theory. If the new concept using maximum exergy principle is used, algal succession can be explained in many actual cases. Therefore, It is estimated that structural dynamic model using maximum exergy principle might be a excellent tool to understand succession of nature from now on.

An Attack-based Filtering Scheme for Slow Rate Denial-of-Service Attack Detection in Cloud Environment

  • Gutierrez, Janitza Nicole Punto;Lee, Kilhung
    • Journal of Multimedia Information System
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    • v.7 no.2
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    • pp.125-136
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    • 2020
  • Nowadays, cloud computing is becoming more popular among companies. However, the characteristics of cloud computing such as a virtualized environment, constantly changing, possible to modify easily and multi-tenancy with a distributed nature, it is difficult to perform attack detection with traditional tools. This work proposes a solution which aims to collect traffic packets data by using Flume and filter them with Spark Streaming so it is possible to only consider suspicious data related to HTTP Slow Rate Denial-of-Service attacks and reduce the data that will be stored in Hadoop Distributed File System for analysis with the FP-Growth algorithm. With the proposed system, we also aim to address the difficulties in attack detection in cloud environment, facilitating the data collection, reducing detection time and enabling an almost real-time attack detection.

Implication of Co-Branding in Hotel Foodservice Department (호텔 식음료부문의 공동브랜딩 도입에 관한 연구)

  • Kim, Young-Kyu;Choi, Young-Joon
    • Journal of the Korean Society of Food Culture
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    • v.20 no.2
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    • pp.232-242
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    • 2005
  • It is the aim of this study to identify and develop improved management practice and competitive edge through co-branding which has been adopted extensively in the States. There is no universally accepted definition of co-branding. The term has been used interchangeably with labels such as brand alliance and composite branding. This study is exploratory in nature and at best a pilot study as few academic research are found dealing with actual cases between hotels and restaurant companies in Korea. Through related literatures reviews and research findings, this study will provide valuable insight as to the methods and activities of co-branding and a framework to help industry professions identify co-branding opportunities to enhance the productivity.

A Basic Study on Position Fixing by Free Gyros (자유자이로를 이용한 위치결정에 관한 기초 연구)

  • Park, Sok-Chu;Jeong, Tae-Gweon
    • Journal of Navigation and Port Research
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    • v.28 no.8
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    • pp.653-657
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    • 2004
  • The authors aim to design further an upgraded and self-contained position fixing system to meet the future commercial requirements. As a first step this paper is to investigate the theoretical structure of position fixing based on the nature of free gyro, in which the tilt angles of the two spin axes at an arbitrary position are measured respectively and the elapsed time with respect to a reference position or starting point is observed And it illustrates some limitations to be expected in this system.

Overview of the development of smart base isolation system featuring magnetorheological elastomer

  • Li, Yancheng;Li, Jianchun
    • Smart Structures and Systems
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    • v.24 no.1
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    • pp.37-52
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    • 2019
  • Despite its success and wide application, base isolation system has been challenged for its passive nature, i.e., incapable of working with versatile external loadings. This is particularly exaggerated during near-source earthquakes and earthquakes with dominate low-frequency components. To address this issue, many efforts have been explored, including active base isolation system and hybrid base isolation system (with added controllable damping). Active base isolation system requires extra energy input which is not economical and the power supply may not be available during earthquakes. Although with tunable energy dissipation ability, hybrid base isolation systems are not able to alter its fundamental natural frequency to cope with varying external loadings. This paper reports an overview of new adventure with aim to develop adaptive base isolation system with controllable stiffness (thus adaptive natural frequency). With assistance of the feedback control system and the use of smart material technology, the proposed smart base isolation system is able to realize real-time decoupling of external loading and hence provides effective seismic protection against different types of earthquakes.

The effects of comics in modern society (현대사회에서 만화가 미치는 영향)

  • 진정식
    • Proceedings of the Korea Contents Association Conference
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    • 2003.11a
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    • pp.454-459
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    • 2003
  • Nowadays comic strip(or comics) has surpassed its limits as a role of humor and amusement. And it has firmly established its role as a kind of public information and mass media. Furthermore it is used as materials for effective learning and human nature education to prevent the problems caused by rapid changes, and means to lessen or relax stress. The author will examine the specific ability, characteristics and potential of comics in this modem society. This paper will discuss the results caused by comic strip and show the possibility that comics can achieve the aim as a mass media

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Adsorption and Desorption of Chemical Warfare Agent Simulants on Silica Surfaces with Hydrophobic Coating

  • Park, Eun Ji;Kim, Young Dok
    • Bulletin of the Korean Chemical Society
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    • v.34 no.7
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    • pp.1967-1971
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    • 2013
  • Aim of our study is finding adsorbents suitable for pre-concentration of chemical warfare agents (CWAs). We considered Tenax, bare silica and polydimethylsiloxane (PDMS)-coated silica as adsorbents for dimethyl methylphosphonate (DMMP) and dipropylene glycol methyl ether (DPGME). Tenax showed lower thermal stability, and therefore, desorption of CWA simulants and decomposition of Tenax took place simultaneously. Silica-based adsorbents showed higher thermal stabilities than Tenax. A drawback of silica was that adsorption of CWA simulant (DMMP) was significantly reduced by pre-treatment of the adsorbents with humid air. In the case of PDMS-coated silica, influence of humidity for CWA simulant adsorption was less pronounced due to the hydrophobic nature of PDMS-coating. We propose that PDMS-coated silica can be of potential importance as adsorbent of CWAs for their pre-concentration, which can facilitate detection of these CWAs.

Regarding Institutional Review Board Issues of Health Service Research Field (보건학 연구에서 연구윤리심의위원회 심의)

  • Lee, Sun-Hee
    • Health Policy and Management
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    • v.32 no.1
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    • pp.1-2
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    • 2022
  • With the rising attention dedicated to research ethics, the responsibility of researchers to comply with research ethics is also highlighted. Among a number of research ethics obligations that researchers should abide by, an institutional review board (IRB) review is the most essential step to be taken before launching research. As the health service research field grapples with human subjects, it closely aligns with IRB deliberation. However, it seems that researchers still do not fully understand their obligations of IRB reviews. Due to the nature of health services research, there are many cases that are exempt from IRB reviews, which often elicits confusion in the research field. On that note, we aim to explore the issues regarding IRB reviews that health service researchers need to know.