The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Reza Tavakkolimoghaddam - One of the best experts on this subject based on the ideXlab platform.

  • designing blood supply chain network in Disaster Situation considering blood groups and expiration date
    Social Science Research Network, 2020
    Co-Authors: Milad Asadpour, Omid Boyer, Reza Tavakkolimoghaddam
    Abstract:

    The purpose of this paper is designing blood supply chain network in Disaster Situation considering blood groups and expiration dates. In the proposed network, there are blood collection centers, labs for quality assurance and producing blood products, and hospitals. Donors refer to blood collecting centers. These centers receive blood from donors and transfer to labs. After required tests, labs send blood products to hospitals. In the proposed model of this study, a blood product, i.e. plasma is considered. The proposed model is a MIP model which minimizes the total cost of the network, including: the establishment cost of facilities, cost of transportation, and cost of holding inventory. Furthermore, uncertainty in demand has been considered using different scenarios. Moreover, in order to meet the demand, blood groups and plasma expiration date have also been investigated. Finally, the efficiency of the proposed model is investigated using random problems in different dimensions.

  • reliable blood supply chain network design with facility disruption a real world application
    Engineering Applications of Artificial Intelligence, 2020
    Co-Authors: Nazanin Haghjoo, Reza Tavakkolimoghaddam, Hani Shahmoradimoghadam, Yaser Rahimi
    Abstract:

    Abstract The blood supply of hospitals in Disasters is a crucial issue in supply chain management. In this paper, a dynamic robust location–allocation model is presented for designing a blood supply chain network under facility disruption risks and uncertainty in a Disaster Situation. A scenario-based robust approach is adapted to the model to tackle the inherent uncertainty of the problem, such as a great deal of a periodic variation in demands and facilities disruptions. It is considered that the effect of disruption in facilities depends on the initial investment level for opening them, which are affected by the allocated budget. The usage of the model is implemented by a real-world case example that addresses the demand and disruption probability as uncertain parameters. For large-scale problems, two meta-heuristic algorithms, namely the self-adaptive imperialist competitive algorithm and invasive weed optimization, are presented to solve the model. Furthermore, several numerical examples of managerial insights are evaluated.

  • a bi objective location allocation problem of temporary emergency stations and ambulance routing in a Disaster Situation
    2018 4th International Conference on Optimization and Applications (ICOA), 2018
    Co-Authors: Reza Tavakkolimoghaddam, Pedram Memari, Ehsan Talebi
    Abstract:

    The aim of this study is to introduce a new temporary emergency stations distribution for emergency medical services (EMSs) simultaneously in order to find the optimal ambulance routing in a Disaster response. Planning and preparedness are a set of activities in pre-Disaster Situations. When a Disaster may not occur for a long time in a specific city, we cannot predict the time of its occurrence. However, in Disaster Situations, an EMS is faced with a large number of injured people, most of them with critical injuries, in which normal facilities and planning cannot respond. Last Disasters teach us that we should be ready to respond correctly to decrease morbidity and mortality. This study seeks a better plan for patients in a post-Disaster by categorizing them into very high emergency and normal patients. The main aim of the presented model is to find the best ambulance routing by minimizing the total response time, meanwhile finding the optimal number of a temporary emergency station and the best location setup by taking costs into consideration. The model is exactly solved by the e-constraint method. Then, we can propose the optimal planning for the decision makers.

  • fuzzy dynamic location allocation problem with temporary multi medical centers in Disaster management
    IFAC-PapersOnLine, 2018
    Co-Authors: Pedram Memari, Reza Tavakkolimoghaddam, M Partovi, A Zabihian
    Abstract:

    Abstract Disaster follows a large number of injured people in a short period of time. Emergency Medical Service (EMS) cannot respond them with normal facilities, which needs to allocate temporary emergency stations for covering patients. Also, the normal facilities and hospital may encounter with damages. The aim of this study is to maximal-covering patients in a Disaster Situation by considering the priority to seriously injured people to treatment. For this purpose, a new fuzzy dynamic bi-objective location-allocation model with a multi-medical server and queuing M/M/c framework is introduced. Patients are responded and categorized into four types of different priority. Because of changing the patient type, the model will be dynamic. It can also accept new patients, and medical servers can displace among temporary emergency stations according to demands of areas in each period. The first objective is to minimize the construction cost of temporary emergency stations and the rate of losing patients, in which EMS cannot respond. The second objective is to minimize the travel time of patients and queue time simultaneously (i.e., minimize the response time). The augmented e-constraint method and non-dominated sorting genetic algorithm (NSGA-II) are used to validate and solve the model for the given problems. Finally, this study considers preparedness and response phases in the EMS system of the Tehran city.

Kazuhiko Kinoshita - One of the best experts on this subject based on the ideXlab platform.

  • interface mode assignment method for self reconstruction of wireless mesh networks based on ieee 802 11 infrastructure mode
    Ieej Transactions on Electrical and Electronic Engineering, 2020
    Co-Authors: Erdenetuya Dorj, Kazuhiko Kinoshita
    Abstract:

    The key features of computer networks available for Disaster Situation is reliable, fault tolerance and self-configurable. Therefore, using wireless mesh network for Disaster prevention and recover system has gain much attention from the research community in last decades. In addition, from the practical aspects of the network infrastructures of the Disaster system, we should assume the core capabilities such as wireless connectivity in wide range, ease of use, and low cost so on. In this paper, we propose an interface mode assignment method for reconstructing a route from an isolated router to a gateway (GW) router in a wireless mesh network based on IEEE 802.11 infrastructure mode after a Disaster occurrance. The proposed method assigns an adequate mode to each interface in an isolated router to recover the network reachability in distributed manner. Simulation results show the effectiveness of the proposed method via two different scenarios.

  • a practical route reconstruction method for wi fi mesh networks in Disaster Situation with spare ap
    Social Science Research Network, 2019
    Co-Authors: Erdenetuya Dorj, Jovilyn Therese B Fajardo, Kazuhiko Kinoshita
    Abstract:

    Computer networks comprise essential infrastructure in modern society and must function even in a Disaster Situation. Therefore, fault-tolerant networks are being actively studied. Disaster information systems, however, suffer from two main issues: lack of their utilization in peacetime and the difficulty for a non-expert to manage them should a Disaster strike. Therefore, we place special emphasis on the development of a reliable network infrastructure that can function during both normal and Disaster times, using a Wi-Fi-based wireless mesh network. In a large-scale Disaster Situation, our goal is to identify a way to reconstruct the mesh network by adding the minimum number of spare access points (APs) to ensure the reachability of all mesh routers to the backbone network. Furthermore, we consider that only public workers without any experience with wireless communication technologies must decide upon the adequate locations for spare APs and install them. Both of simulation experiments and field trial prove the effectiveness of the proposed methods.

  • a practical route reconstruction method for wi fi mesh networks in Disaster Situation with spare ap
    International Journal of Wireless & Mobile Networks, 2019
    Co-Authors: Erdenetuya Dorj, Jovilyn Therese B Fajardo, Kazuhiko Kinoshita
    Abstract:

    A Practical Route Reconstruction Method for Wi-Fi Mesh Networks In Disaster Situation with Spare AP

  • a route reconstruction method with spare ap for wireless mesh networks in Disaster Situation
    Proceedings of the 2nd International Conference on Vision Image and Signal Processing, 2018
    Co-Authors: Erdenetuya Dorj, Kazuhiko Kinoshita
    Abstract:

    Computer networks are kind of essential infrastructure in modern society and should work even in a Disaster Situation so that fault-tolerant networks are actively being studied. Basically, Disaster information systems, however, are blamed for two main issues such as the lack of their utilization in peacetime and the difficulty for a non-expert to manage them in case of Disaster Situation. Therefore, we give a special emphasis to development of a roadside edge server for both normal-time and Disaster-time through Wi-Fi based wireless mesh network. In large-scale Disaster Situation, our goal is to figure out a way to reconstruct the mesh network by adding the minimum number of spare APs which satisfies the reachability for all the roadside edge servers to the backbone network. Furthermore, we consider that the only public workers without any experience on wireless communication technologies must decide adequate locations for spare APs and install them. The simulation results prove the effectiveness of the proposed method.

Kazuhide Kanenishi - One of the best experts on this subject based on the ideXlab platform.

  • Disaster recovery framework for e learning environment using private cloud collaboration and emergency alerts
    International Conference on Human Interface and Management of Information, 2015
    Co-Authors: Satoshi Togawa, Kazuhide Kanenishi
    Abstract:

    In this research, we have built a framework of Disaster recovery such as against earthquake, tsunami Disaster and a heavy floods for e-Learning environment. Especially, our proposed framework is based on private cloud collaboration. We build a prototype system based on IaaS architecture, and this prototype system is constructed by several private cloud fabrics on each site such as several universities. These private cloud fabric; that is handled almost like same block device. For LMS (Learning Management System) to work, we need to boot up virtual machines which installed LMS. The virtual disk images of each virtual machines are stored into the distributed storage system. The distributed storage system will be able to keep running as a large block device. We can control the virtual machine’s status and virtual machines positioning on the private cloud fabrics by the private cloud collaboration controller related with the emergency alert via smart phone. We think that our private cloud collaboration framework can continue working for e-Learning environment under the post-Disaster Situation. In this paper, we show our private cloud collaboration framework. And, we show the experimental results on the prototype system.

  • building of a Disaster recovery framework for e learning environment using private cloud collaboration
    International Association for Development of the Information Society, 2014
    Co-Authors: Satoshi Togawa, Kazuhide Kanenishi
    Abstract:

    In this research, we have built a framework of Disaster recovery such as against earthquake, tsunami Disaster and a heavy floods for e-Learning environment. Especially, our proposed framework is based on private cloud collaboration. We build a prototype system based on IaaS architecture, and this prototype system is constructed by several private cloud fabrics. These private cloud fabrics are operated as a large private cloud fabric. The distributed storage system builds on each private cloud fabric; that is handled almost like same block device. For LMS (Learning Management System) to work, we need to boot up virtual machines which installed LMS. The virtual disk images of each virtual machines are stored into the distributed storage system. The distributed storage system will be able to keep running as a large file system. We can control the virtual machines’ status and virtual machines positioning on the private cloud fabrics by the private cloud collaboration controller with a smartphone communication. The private cloud collaboration controller is able to grasp Disaster alert notifications. The Disaster alert notification can be caught by a cellphone carrier via smartphone function. We think that our private cloud collaboration framework can continue working for e-Learning environment under the post-Disaster Situation. In this paper, we show our private cloud collaboration framework. And next, we show the experimental results on the prototype configuration.

  • private cloud collaboration framework for e learning environment for Disaster recovery using smartphone alert notification
    International Conference on Human Interface and Management of Information, 2014
    Co-Authors: Satoshi Togawa, Kazuhide Kanenishi
    Abstract:

    In this research, we have built a framework of Disaster recovery such as against earthquake and tsunami Disaster for e-Learning environment. We build a prototype system based on IaaS architecture, and this prototype system is constructed by several private cloud computing fabrics. These private cloud fabrics are constructed to operate one large private cloud fabric under the VPN connection. The distributed storage system builds on each private cloud fabric; that is handled almost like same block device such as one file system. For LMS (Learning Management System) to work, we need to boot virtual machines. The virtual machines are booted from the virtual disk images that are stored into the distributed storage system. The distributed storage system will be able to keep running as one large file system when some private cloud fabric does not work by any Disasters. The Disaster alert such as Earthquake Early Warning can be caught by usual smartphone. And we control virtual machines status and virtual machines positioning on the private cloud fabrics by caught Disaster alert notifications. We think that our private cloud collaboration framework can continue working for e-Learning environment under the post-Disaster Situation. In this paper, we show our private cloud collaboration framework and the experimental results on the prototype configuration.

  • private cloud cooperation framework of e learning environment for Disaster recovery
    Systems Man and Cybernetics, 2013
    Co-Authors: Satoshi Togawa, Kazuhide Kanenishi
    Abstract:

    In this research, we have built a framework of Disaster recovery such as against earthquake and tsunami Disaster for e-Learning environment. We build a prototype system based on IaaS architecture, and this prototype system is constructed by several private cloud computing fabrics. These private cloud fabrics are constructed to operate one large private cloud fabric under the VPN connection. The distributed storage system builds on each private cloud fabric, that is handled almost like same block device such as one large file system. For LMS (Learning Management System) to work, we need to boot virtual machines. The virtual machines are booted from the virtual disk images that are stored into the distributed storage system. The distributed storage system will be able to keep running as one large file system when some private cloud fabric does not work by any troubles. We think that our inter-cloud framework can continue working for e-Learning environment under the post-Disaster Situation. In this paper, we show our inter-cloud cooperation framework and the experimental results on the prototype configuration.

  • private cloud cooperation framework for reducing the earthquake damage on e learning environment
    International Conference on Human-Computer Interaction, 2013
    Co-Authors: Satoshi Togawa, Kazuhide Kanenishi
    Abstract:

    In this research, we have built a framework of reducing earthquake and tsunami Disaster for e-Learning environment. We build a prototype system based on IaaS architecture, and this prototype system is constructed by several private cloud fabrics. The distributed storage system builds on each private cloud fabric; that is handled almost like same block device such as one large file system. For LMS to work, we need to boot virtual machines. The virtual machines are booted from the virtual disk images that are stored into the distributed storage system. The distributed storage system will be able to keep running as one large file system when some private cloud fabric does not work by any troubles. We think that our inter-cloud framework can continue working for e-Learning environment under the post-Disaster Situation.

Bernd Freisleben - One of the best experts on this subject based on the ideXlab platform.

  • smart street lights and mobile citizen apps for resilient communication in a digital city
    Global Humanitarian Technology Conference, 2019
    Co-Authors: Lars Baumgartner, Jonas Hochst, Patrick Lampe, Ragnar Mogk, Artur Sterz, Pascal Weisenburger, Mira Mezini, Bernd Freisleben
    Abstract:

    While information and communication technology is crucial for the operation of urban infrastructures and the wellbeing of its inhabitants, current technology is quite vulnerable to disruptions of various kinds. In future smart cities, a more resilient urban infrastructure is imperative to handle the increasing number of hazardous Situations. We present a novel resilient communication approach based on smart street lights as part of the public infrastructure. It supports people in their everyday life and adapts its functionality to the challenges of emergency Situations. Our approach relies on various environmental sensors and in-situ processing for automatic Situation assessment, and a range of communication mechanisms for maintaining a communication network. Furthermore, resilience is not only achieved based on infrastructure deployed by a digital city's municipality, but also based on integrating citizens through software that runs on their mobile devices. Web-based zero-installation and platform-agnostic apps can switch to device-to-device communication to continue benefiting people even during a Disaster Situation. Our approach, featuring a covert channel for professional responders and a zero-installation app, is evaluated through a prototypical implementation based on a commercially available street light.

  • smart street lights and mobile citizen apps for resilient communication in a digital city
    arXiv: Human-Computer Interaction, 2019
    Co-Authors: Lars Baumgartner, Jonas Hochst, Patrick Lampe, Ragnar Mogk, Artur Sterz, Pascal Weisenburger, Mira Mezini, Bernd Freisleben
    Abstract:

    Currently, nearly four billion people live in urban areas. Since this trend is increasing, natural Disasters or terrorist attacks in such areas affect an increasing number of people. While information and communication technology is crucial for the operation of urban infrastructures and the well-being of its inhabitants, current technology is quite vulnerable to disruptions of various kinds. In future smart cities, a more resilient urban infrastructure is imperative to handle the increasing number of hazardous Situations. We present a novel resilient communication approach based on smart street lights as part of the public infrastructure. It supports people in their everyday life and adapts its functionality to the challenges of emergency Situations. Our approach relies on various environmental sensors and in-situ processing for automatic Situation assessment, and a range of communication mechanisms (e.g., public WiFi hotspot functionality and mesh networking) for maintaining a communication network. Furthermore, resilience is not only achieved based on infrastructure deployed by a digital city's municipality, but also based on integrating citizens through software that runs on their mobile devices (e.g., smartphones and tablets). Web-based zero-installation and platform-agnostic apps can switch to device-to-device communication to continue benefiting people even during a Disaster Situation. Our approach, featuring a covert channel for professional responders and the zero-installation app, is evaluated through a prototype implementation based on a commercially available street light.

Erdenetuya Dorj - One of the best experts on this subject based on the ideXlab platform.

  • interface mode assignment method for self reconstruction of wireless mesh networks based on ieee 802 11 infrastructure mode
    Ieej Transactions on Electrical and Electronic Engineering, 2020
    Co-Authors: Erdenetuya Dorj, Kazuhiko Kinoshita
    Abstract:

    The key features of computer networks available for Disaster Situation is reliable, fault tolerance and self-configurable. Therefore, using wireless mesh network for Disaster prevention and recover system has gain much attention from the research community in last decades. In addition, from the practical aspects of the network infrastructures of the Disaster system, we should assume the core capabilities such as wireless connectivity in wide range, ease of use, and low cost so on. In this paper, we propose an interface mode assignment method for reconstructing a route from an isolated router to a gateway (GW) router in a wireless mesh network based on IEEE 802.11 infrastructure mode after a Disaster occurrance. The proposed method assigns an adequate mode to each interface in an isolated router to recover the network reachability in distributed manner. Simulation results show the effectiveness of the proposed method via two different scenarios.

  • a practical route reconstruction method for wi fi mesh networks in Disaster Situation with spare ap
    Social Science Research Network, 2019
    Co-Authors: Erdenetuya Dorj, Jovilyn Therese B Fajardo, Kazuhiko Kinoshita
    Abstract:

    Computer networks comprise essential infrastructure in modern society and must function even in a Disaster Situation. Therefore, fault-tolerant networks are being actively studied. Disaster information systems, however, suffer from two main issues: lack of their utilization in peacetime and the difficulty for a non-expert to manage them should a Disaster strike. Therefore, we place special emphasis on the development of a reliable network infrastructure that can function during both normal and Disaster times, using a Wi-Fi-based wireless mesh network. In a large-scale Disaster Situation, our goal is to identify a way to reconstruct the mesh network by adding the minimum number of spare access points (APs) to ensure the reachability of all mesh routers to the backbone network. Furthermore, we consider that only public workers without any experience with wireless communication technologies must decide upon the adequate locations for spare APs and install them. Both of simulation experiments and field trial prove the effectiveness of the proposed methods.

  • a practical route reconstruction method for wi fi mesh networks in Disaster Situation with spare ap
    International Journal of Wireless & Mobile Networks, 2019
    Co-Authors: Erdenetuya Dorj, Jovilyn Therese B Fajardo, Kazuhiko Kinoshita
    Abstract:

    A Practical Route Reconstruction Method for Wi-Fi Mesh Networks In Disaster Situation with Spare AP

  • a route reconstruction method with spare ap for wireless mesh networks in Disaster Situation
    Proceedings of the 2nd International Conference on Vision Image and Signal Processing, 2018
    Co-Authors: Erdenetuya Dorj, Kazuhiko Kinoshita
    Abstract:

    Computer networks are kind of essential infrastructure in modern society and should work even in a Disaster Situation so that fault-tolerant networks are actively being studied. Basically, Disaster information systems, however, are blamed for two main issues such as the lack of their utilization in peacetime and the difficulty for a non-expert to manage them in case of Disaster Situation. Therefore, we give a special emphasis to development of a roadside edge server for both normal-time and Disaster-time through Wi-Fi based wireless mesh network. In large-scale Disaster Situation, our goal is to figure out a way to reconstruct the mesh network by adding the minimum number of spare APs which satisfies the reachability for all the roadside edge servers to the backbone network. Furthermore, we consider that the only public workers without any experience on wireless communication technologies must decide adequate locations for spare APs and install them. The simulation results prove the effectiveness of the proposed method.