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Kohl A.,Dresden University of Applied Sciences
Discrete Mathematics and Theoretical Computer Science | Year: 2013

A b-coloring of a graphGby k colors is a proper vertex coloring such that each color class contains a color-dominating vertex, that is, a vertex having neighbors in all other k - 1 color classes. The b-chromatic number Xb(G) is the maximum integer k for which G has a b-coloring by k colors. Let Cr n be the rth power of a cycle of order n. In 2003, Effantin and Kheddouci established the b-chromatic number Xb(Cr n) for all values of n and r, except for 2r + 3 ≤ n ≤ 3r. For the missing cases they presented the lower bound L := min{n - r - 1, r + 1 + [ n-r-1/3]} and conjectured that Xb(C r n) = L. In this paper, we determine the exact value on Xb(Cr n) for the missing cases. It turns out that Xb(Cr n) > L for 2r + 3 ≤ n ≤ 2r + 3 + r-6/4. © 2013 Discrete Mathematics and Theoretical Computer Science (DMTCS), Nancy, France. Source

Lehmann R.,Dresden University of Applied Sciences
AVN Allgemeine Vermessungs-Nachrichten | Year: 2015

This contribution describes an automatic method, which can be applied to classical geodetic computation problems. Starting from given input quantities (e. g. coordinates of known points, measurements) computation opportunties for all other relevant quantities are found. For redundant input quantities a multitude of different computation opportunties exists, which are all found automatically, and their results are computed. If the computation is non-unique, but only a finite number of solutions exist, then all solutions are found and computed. By comparison of the different computation results there is the opportunity to detect gross errors in the input quantities and to produce a robust final result. The method does not work stochastically, so no stochastic model of the observations is required. The description of the algorithm is illustrated with the help of examples. The method was implemented as a webserver script and is available for free in the internet. Source

Gestring I.,Dresden University of Applied Sciences
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2016

Green supply chain design considers besides costs and service level as well the environmental impact. There is a trade-off in terms of costs and environmental impact between the size of warehouses and the transport mode and transport frequency. High frequent deliveries with trucks result in high emission during transport, but low emission during the storage process. Less frequent delivery with trains or ships have a lower emission during transport, but the items must be stored for a longer time and so need more space in a warehouse. The consequences are illustrated with a case study. The total CO2emission and the eco-efficiency are calculated. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2016. Source

Agency: Cordis | Branch: FP7 | Program: CP | Phase: ICT-2007.1.1 | Award Amount: 21.00M | Year: 2008

Key objectives of EUWB are i) to explore the enormous economic potential of the ground-breaking Ultra-Wideband (UWB) radio technology, ii) to extend the UWB concept with advanced cognitive radio, multiband/multimode networking, and multiple antenna system concepts, iii) to enable the introduction of advanced services and competitive applications using the radio spectrum in a sophisticated manner.\nThe advanced scientific and technical project work will be accompanied by activities in European and world wide regulation and standardisation bodies in which EUWB partners are highly committed. As a key for economic success of UWB, the project partners will continue to devote significant efforts to participation in CEPT ECC, IEEE, ITU, ETSI, and ECMA working towards consensus building and iterative improvement of the initial European and world-wide UWB regulation and standardisation.\nUWB technology enables gigabits per second short range communications and inherent precise real-time location tracking. Prominent examples to be implemented in the EUWB project are the Intelligent Home environment, the Public Transport environment, the Automotive environment and the Next Generation of Heterogeneous Public Access Network environment, following a strong demand from the mentioned industry sectors.\nEUWB is an industry-led initiative of 22 highly regarded industrial, consulting, and academic organisations. It builds on previous projects, such as PULSERS, and take into account stakeholders of the whole value chain. Major aim is to consolidate the technology advances in scientific areas related to UWB and to define system concepts for the envisaged four application areas. The results will be materialised in four application platforms built on the open UWB technology developed in EUWB. Besides integration in the AIRBUS plane, the DAIMLER car, the PHILIPS future home, and the TELEFNICA access network, scientific studies will guide industry to gain competitiveness with their UWB system.

Agency: Cordis | Branch: FP7 | Program: CP-IP | Phase: SST.2008.1.1.6. | Award Amount: 12.92M | Year: 2009

The study of CER, UNIFE, UIC and Euromot of the railway and engine manufacturing industries concluded on a risk of disruptive effect of the NRMM Directive application on the railway diesel vehicle supply market, leading to a possible risk of a partial modal shift from rail to road on regional passenger lines and freight transportation specialized routes, with even foreseeable consequences on the operations of the main electrified system. Such a shift would of course be highly detrimental to the achievement of the general objectives of a sustainable development of the European transport system. The project would also find the best balance between environmental and economical requirements, in order to avoid an always possible shift from rail transport to a less sustainable mode like road, even on electrified main routes would also encourage the engine industry to give rail applications serious consideration in their product development plans and provide the European Commission with proposals for a flexible move to the IIIB objective. The four years project is therefore build on the basis of several application sub-projects, representative of the different engine applications (rail cars, Diesel Multiple Units, shunting locomotives, main line light and heavy-haul locomotives) that will enable the industry to evaluate the different solutions to be applied to rail systems in real operating conditions. The optimum trade-off between the reduction of pollutant emissions by rail vehicles and the fuel energy consumption and CO2 emissions, as well as the overall impact of the applied technologies on the environment through a life cycle assessment approach, will be identified by this experimental part of the project. But the rail manufacturing industry also wishes to foster the development of rail specific applications of innovative solutions so as to even further develop the competitive advantages of rail transport in terms of sustainable development.

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