1,720,969 research outputs found
A survey of literature on automated storage and retrieval systems from 2009 to 2019
No full textThis paper provides a literature review on automated storage and retrieval systems based on the Scopus database. The last comprehensive literature review that analyses the subject in its entirety dates back to 2009 by Roodbergen and Vis. Since then, the scientific community has provided many new efficient solutions, most of which are collected in Scopus. All these new published solutions need to be classified and summarised; thus, for this paper, more than one thousand scientific publications were analysed in order to classify the proposed solutions, deliver new academic insights to the field, and provide clear guidelines for researchers and practitioner
Architecture, application and implementation of a digital twin of the RFID-enabled material flow in real-time for automotive intralogistics
No full textRFID is used in logistics in the automotive industry to automate processes and optimise material flow. However, the data generated by RFID installations during operation offer more potential for further analyses to collect even more benefits from the technology. Therefore, in this paper, RFID data will be used to create a digital twin of the RFID-enabled material flow (DTRMF) in real-time and to programme various big data analyses. The architecture of the DTRMF must meet various qualitative requirements. Since the big data and digital twin architectures available in the literature either do not optimally fulfil all these requirements, or they are not described in enough detail to support real applications, this paper presents a new digital twin architecture for RFID-enabled material flow. This architecture consists of the data ingestion layer, data processing and analyses layer, data storage layer, visualisation layer, and the optional semantic layer. In addition, suitable technologies for the implementation of the architecture are described, and the feasibility of the architecture is demonstrated and verified by means of a case study
Guideline to Safety and Security in Federated Remote Labs
Full text linkThe interest of the educational community in the laboratory- (lab) based education has grown steadily. As remote labs have started to be a reliable alternative to traditional hands-on labs, security and safety issues are becoming increasingly important, as their interconnected nature raises new and challenging issues. The complexity increases when multiple institutions are involved in a federated lab infrastructure. This paper provides a guideline for assessing safety and security in federated labs following the VDI/VDE 2182 guideline and verifies the concept based on remote labs in three different academic institutions
Safety and Security in Federated Remote Labs – A Requirement Analysis
No full textRecently, the interest of the educational community in laboratory- (lab-) based education has grown steadily. As remote and virtual labs have started to be a reliable alternative to traditional hands-on labs, security and safety issues are becoming increasingly important, especially in the case of remote laboratories, as their interconnected nature raises new and challenging issues. When multiple institutions are involved in a federated labs infrastructure, the complexity increases. Since a structured approach to assess safety and security for federated remote labs is missing, this paper aims at clarifying the general requirements to be considered and proposes a general concept for assessing safety and security in federated labs. Firstly, we analyze the current state on safety and security in remote labs by means of a literature review. Secondly, we investigate existing requirements and define operational requirements for a safety and security guideline in federated remote labs. Thirdly, we provide an overview about standardization approaches and existing guidelines and suggest a guideline, which matches our requirements analysis
Digilab4u: General architecture for a network of labs
No full textThe paper presents the architecture designed to create a network of remote and virtual laboratories, to integrate and enhance them with new technologies and methods for lab-based education, within five universities inside the Open Digital Lab For You (DigiLab4U) project. Many factors lead to an increase in interest in networks of labs. The main ones aim on increasing the exploitation of laboratory equipment, together with the increasing necessity of practical experience in students’ careers. Lead by this necessity, the network developed an education environment with a strong focus on Industry 4.0 and Industrial Internet of Things. Moreover, its aim is the integration of new technologies and alternative teaching methods within the environment through an iterative approach. Compliant with these objectives and considering the standards available for such concepts, a new architecture of a network has been created based on the Industrial Reference Internet Architecture. With respect to these standards, the general architecture has been built as a client-server architecture composed of three elements: (i) Client, (ii) Web server, and (iii) Local server. We also took into consideration that the project aims to enlarge the network in the future, making it accessible from different institutions all over the world, to enable the learners to perform new experiments and enhance their skills. Besides, it enables the integration of technologies such as Serious Games and Learning Analytics, as they are becoming more and more widespread and necessary for teaching and assessing the students. To ease the understanding and the scalability of the network, three different points of view architecture has been proposed, by splitting and describing it into software, hardware, and logical perspectives
Challenges and Solutions to Integrate Remote Laboratories in a Cross-University Network
No full textLocation-independent networking of laboratory infrastructures is opening new possibilities for teaching and learning. In order to make full use of the possibilities it makes sense to form associations and use real, partly digitized and fully digital laboratories shared across locations. The connection of different laboratories with different equipment and different conditions confronts us with technical challenges. This article presents challenges, which are faced in an international project, as well as possible technical solutions and the way to our decision
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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