The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Konrad Wegener - One of the best experts on this subject based on the ideXlab platform.
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an integrated Cost Model for selective laser melting slm
Rapid Prototyping Journal, 2013Co-Authors: L. Rickenbacher, Adriaan Spierings, Konrad WegenerAbstract:Purpose – The integration of additive manufacturing (AM) processes into a production environment requires a Cost‐Model that allows the precise estimation of the total Cost per part, although the part might be produced in the same build job together with other parts of different sizes, complexities and quantities. Several Cost‐Models have been proposed in the past, but most of them are not able to calculate the Costs for each single part in a mixed build job or are not suitable for Selective Laser Melting (SLM). The purpose of this paper is to develop a Cost Model, including all pre‐ and post‐processing steps linked to SLM.Design/methodology/approach – Based on collected data and the generic Cost Model of Alexander et al., an adapted Model was developed for the SLM process including all required pre‐ and post‐processes. Each process was analysed and Modelled in detail, allowing an evaluation of the influences of the different geometries on the Cost of each part.Findings – By simultaneously building up mult...
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An integrated Cost-Model for selective laser melting (SLM)
Rapid Prototyping Journal, 2013Co-Authors: L. Rickenbacher, Adriaan Spierings, Konrad WegenerAbstract:Purpose – The integration of additive manufacturing (AM) processes into a production environment requires a Cost-Model that allows the precise estimation of the total Cost per part, although the part might be produced in the same build job together with other parts of different sizes, complexities and quantities. Several Cost-Models have been proposed in the past, but most of them are not able to calculate the Costs for each single part in a mixed build job or are not suitable for Selective Laser Melting (SLM). The purpose of this paper is to develop a Cost Model, including all pre- and post- processing steps linked to SLM. Design/methodology/approach – Based on collected data and the generic Cost Model of Alexander et al. , an adapted Model was developed for the SLM process including all required pre- and post-processes. Each process was analysed and Modelled in detail, allowing an evaluation of the influences of the different geometries on the Cost of each part. Findings – By simultaneously building up multiple parts, the manufacturing as well as the set-up time and therefore the total Cost per part can be significantly reduced. In the presented case study a Cost reduction of 41 per cent can be achieved in average. Originality/value – Using different Cost allocation algorithms, the developed Cost Model enables a precise determination of total Cost per part avoiding that any geometry is preferred in simultaneous manufacture. This helps to optimize build jobs and to manufacture SLM parts more economically by pooling parts from different projects, whereas the Cost per part can still be precisely determined.
Victor Lopez - One of the best experts on this subject based on the ideXlab platform.
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a multilayer Cost Model for metro core networks
IEEE\ OSA Journal of Optical Communications and Networking, 2013Co-Authors: Franz Rambach, Beate Konrad, Lars Dembeck, Ulrich Gebhard, Matthias Gunkel, Marco Quagliotti, Laura Serra, Victor LopezAbstract:A capital expenditure Model is a key requirement to evaluate multilayer (ML) metro and core network architectures. Based on the Internet protocol/multiprotocol label switching (IP/MPLS), MPLS-transport profile, optical transport network and WDM technology, a detailed capital expenditure Model developed by researchers from system vendors and network operators is introduced. Besides current equipment and corresponding prices for the different layers, it also contains predictions for technology evolution and pricing until 2018. We show how to determine the price of anML node by constructing it from components specified in the Cost Model. We use the Model in a case study where we benchmark the price of an integrated IP/MPLS/WDM solution.
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A multilayer Cost Model for metro/core networks
IEEE OSA Journal of Optical Communications and Networking, 2013Co-Authors: Franz Rambach, Beate Konrad, Lars Dembeck, Ulrich Gebhard, Matthias Gunkel, Marco Quagliotti, Laura Serra, Victor LopezAbstract:A capital expenditure Model is a key requirement to evaluate multilayer (ML) metro and core network architectures. Based on the Internet protocol/multiprotocol label switching (IP/MPLS), MPLS-transport profile, optical transport network and WDM technology, a detailed capital expenditure Model developed by researchers from system vendors and network operators is introduced. Besides current equipment and corresponding prices for the different layers, it also contains predictions for technology evolution and pricing until 2018. We show how to determine the price of anML node by constructing it from components specified in the Cost Model. We use the Model in a case study where we benchmark the price of an integrated IP/MPLS/WDM solution.
Mohammad Mahdi Kashef - One of the best experts on this subject based on the ideXlab platform.
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Cost Model based service placement in federated hybrid clouds
Future Generation Computer Systems, 2014Co-Authors: Jorn Altmann, Mohammad Mahdi KashefAbstract:As cloud federation allows companies in need of computational resources to use computational resources hosted by different cloud providers, it reduces the Cost of IT infrastructure by lowering capital and operational expenses. This is the result of economies of scale and the possibility for organizations to purchase just as much computing and storage resources as needed whenever needed. However, a clear specification of Cost savings requires a detailed specification of the Costs incurred. Although there are some efforts to define Cost Models for clouds, the need for a comprehensive Cost Model, which covers all Cost factors and types of clouds, is undeniable. In this paper, we cover this gap by suggesting a Cost Model for the most general form of a cloud, namely federated hybrid clouds. This type of cloud is composed of a private cloud and a number of interoperable public clouds. The proposed Cost Model is applied within a Cost minimization algorithm for making service placement decisions in clouds. We demonstrate the workings of our Cost Model and service placement algorithm within a specific cloud scenario. Our results show that the service placement algorithm with the Cost Model minimizes the spending for computational services. Comparison of Cost Models for cloud computing.Design of a comprehensive Cost Model for federated hybrid clouds.Design of an algorithm for service placements in federated hybrid clouds.Performed a sensitivity analysis with the help of the service placement algorithm.
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GECON - A Cost Model for hybrid clouds
Economics of Grids Clouds Systems and Services, 2011Co-Authors: Mohammad Mahdi Kashef, Jorn AltmannAbstract:Cloud computing aims at allowing customers to utilize computational resources and software hosted by service providers. Thus, it shifts the complex and tedious resource and software management tasks typically done by customers to the service providers. Besides promising to eliminate these obstacles of resource management for consumers, Cloud computing also promises to reduce the Cost of IT infrastructure. In particular, it promises to reduce the Cost of IT through lower capital and operational expenses, stemming from a Cloud's economies of scale and from allowing organizations to purchase just as much computer and storage resources as needed whenever needed. A clear specification of savings however requires a detailed specification of the Costs incurred. Although there are some efforts to define Cost Models for Clouds, the need for a comprehensive Cost Model, which covers all Cost factors, is undeniable. In this paper, we cover this gap by suggesting a Cost Model for hybrid Clouds (i.e., the combinations of a private data center (private Cloud) and the public Cloud). This Model is based on a comprehensive literature research on Cost factors and the idea of combining Cost of data centers and Cost for using Clouds. Finally, we demonstrate the workings of the suggested Cost Model by applying it to a specific Cloud scenario.
L. Rickenbacher - One of the best experts on this subject based on the ideXlab platform.
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an integrated Cost Model for selective laser melting slm
Rapid Prototyping Journal, 2013Co-Authors: L. Rickenbacher, Adriaan Spierings, Konrad WegenerAbstract:Purpose – The integration of additive manufacturing (AM) processes into a production environment requires a Cost‐Model that allows the precise estimation of the total Cost per part, although the part might be produced in the same build job together with other parts of different sizes, complexities and quantities. Several Cost‐Models have been proposed in the past, but most of them are not able to calculate the Costs for each single part in a mixed build job or are not suitable for Selective Laser Melting (SLM). The purpose of this paper is to develop a Cost Model, including all pre‐ and post‐processing steps linked to SLM.Design/methodology/approach – Based on collected data and the generic Cost Model of Alexander et al., an adapted Model was developed for the SLM process including all required pre‐ and post‐processes. Each process was analysed and Modelled in detail, allowing an evaluation of the influences of the different geometries on the Cost of each part.Findings – By simultaneously building up mult...
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An integrated Cost-Model for selective laser melting (SLM)
Rapid Prototyping Journal, 2013Co-Authors: L. Rickenbacher, Adriaan Spierings, Konrad WegenerAbstract:Purpose – The integration of additive manufacturing (AM) processes into a production environment requires a Cost-Model that allows the precise estimation of the total Cost per part, although the part might be produced in the same build job together with other parts of different sizes, complexities and quantities. Several Cost-Models have been proposed in the past, but most of them are not able to calculate the Costs for each single part in a mixed build job or are not suitable for Selective Laser Melting (SLM). The purpose of this paper is to develop a Cost Model, including all pre- and post- processing steps linked to SLM. Design/methodology/approach – Based on collected data and the generic Cost Model of Alexander et al. , an adapted Model was developed for the SLM process including all required pre- and post-processes. Each process was analysed and Modelled in detail, allowing an evaluation of the influences of the different geometries on the Cost of each part. Findings – By simultaneously building up multiple parts, the manufacturing as well as the set-up time and therefore the total Cost per part can be significantly reduced. In the presented case study a Cost reduction of 41 per cent can be achieved in average. Originality/value – Using different Cost allocation algorithms, the developed Cost Model enables a precise determination of total Cost per part avoiding that any geometry is preferred in simultaneous manufacture. This helps to optimize build jobs and to manufacture SLM parts more economically by pooling parts from different projects, whereas the Cost per part can still be precisely determined.
Franz Rambach - One of the best experts on this subject based on the ideXlab platform.
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a multilayer Cost Model for metro core networks
IEEE\ OSA Journal of Optical Communications and Networking, 2013Co-Authors: Franz Rambach, Beate Konrad, Lars Dembeck, Ulrich Gebhard, Matthias Gunkel, Marco Quagliotti, Laura Serra, Victor LopezAbstract:A capital expenditure Model is a key requirement to evaluate multilayer (ML) metro and core network architectures. Based on the Internet protocol/multiprotocol label switching (IP/MPLS), MPLS-transport profile, optical transport network and WDM technology, a detailed capital expenditure Model developed by researchers from system vendors and network operators is introduced. Besides current equipment and corresponding prices for the different layers, it also contains predictions for technology evolution and pricing until 2018. We show how to determine the price of anML node by constructing it from components specified in the Cost Model. We use the Model in a case study where we benchmark the price of an integrated IP/MPLS/WDM solution.
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A multilayer Cost Model for metro/core networks
IEEE OSA Journal of Optical Communications and Networking, 2013Co-Authors: Franz Rambach, Beate Konrad, Lars Dembeck, Ulrich Gebhard, Matthias Gunkel, Marco Quagliotti, Laura Serra, Victor LopezAbstract:A capital expenditure Model is a key requirement to evaluate multilayer (ML) metro and core network architectures. Based on the Internet protocol/multiprotocol label switching (IP/MPLS), MPLS-transport profile, optical transport network and WDM technology, a detailed capital expenditure Model developed by researchers from system vendors and network operators is introduced. Besides current equipment and corresponding prices for the different layers, it also contains predictions for technology evolution and pricing until 2018. We show how to determine the price of anML node by constructing it from components specified in the Cost Model. We use the Model in a case study where we benchmark the price of an integrated IP/MPLS/WDM solution.
