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Flat chains in banach spaces  [PDF]
Tarn Adams
Mathematics , 2004,
Abstract: We generalize the notion of flat chains with arbitrary coefficient groups to Banach spaces and prove a sequential compactness result. We also remove the restriction that a flat chain have finite mass in order for its support to exist.
Rectifiability of flat chains  [PDF]
Brian White
Mathematics , 1999,
Abstract: We prove (without using Federer's structure theorem) that a finite-mass flat chain over any coefficient group is rectifiable if and only if almost all of its 0-dimensional slices are rectifiable. This implies that every flat chain of finite mass and finite size is rectifiable. It also leads to a simple necessary and sufficient condition on the coefficient group in order for every finite-mass flat chain to be rectifiable.
An MRP Model for Supply Chains  [cached]
Lutfu Sagban?ua,M. Nurettin Alabay
International Business Research , 2010, DOI: 10.5539/ibr.v3n4p124
Abstract: The information technologies pose as one of the biggest enablers of the modern supply chain management (SCM). This study focuses on one of the vital use of information technologies in SCM context, namely Materials Requirement Planning (MRP). Types and ways of information technologies related to supply chain management is analyzed. MRP is discussed along with a model to provide an example. Information about the developed software for the model is also provided. MRP and its value in inventory management systems are stated as a basis for the future research which will improve the current MRP model introduced along with the experimental results as a basis for comparison.
Web Services Supply Chains: A Literature Review  [PDF]
V. Krithika,Dr. Arshinder Kaur,Dr. K. Chandra Sekaran
Computer Science , 2012,
Abstract: The aim of this review paper is to bring into light a potential area i.e., web services supply chains for research by analyzing the existing state of art in this. It is observed from the review process that there seems to be much less work done in the area of web service supply chains as compared to e-commerce and product oriented service supply chains. The service quality assurance models, end to end Quality of Service (QoS) models, attempts made to QoS attributes are also found to be from individual perspectives of participating entities in a service process rather than a collective perspective considering individual QoS attributes rather than multiple QoS attributes. In light of these gaps we highlight the comparison between product oriented and pure online/ web service supply chains, a need for quality driven optimization in the web services supply chains, perceived complexities in the existing work and propose a conceptual model.
Simulation in Supply Chains: An Arena basis  [cached]
James Bekker,Sylvain Guittet-Remaud
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: The quest for global competitiveness brought about new business approaches, of which the supply chain has become an important entity during the last few years. With even more complex decision structures, demand variation and the need for evaluating alternatives within this frame, simulation and simulation-optimization have been identified as key decision-making tools. This paper briefly reviews the basic characteristics of supply chains, and illustrates that existing software may be integrated towards a supply chain simulator. AFRIKAANSE OPSOMMING: Die strewe na globale mededingendheid vereis nuwe benaderings deur ondernemings, terwyl die toevoerketting 'n belangrike entiteit gedurende die afgelope paar jaar geword het. Toenemende kompleksiteit in besluitneming, variasie in vraag en die behoefte om alternatiewe binne hierdie komplekse raamwerk te evalueer, het tot gevolg dat simulasie en simulasie-optimering as sleutel-besluitneming gereedskap beskou word. Hierdie artikel gee 'n kort oorsig oor die basiese eienskappe van toevoerkettings, en dit word getoon dat bestaandeprogrammatuur integreer kan word om 'n toevoerketting-simuleerderte ontwikkel.
Structure of aluminum atomic chains  [PDF]
Prasenjit Sen,S. Ciraci,A. Buldum,Inder P. Batra
Physics , 2001, DOI: 10.1103/PhysRevB.64.195420
Abstract: First-principles density functional calculations reveal that aluminum can form planar chains in zigzag and ladder structures. The most stable one has equilateral triangular geometry with four nearest neighbors; the other stable zigzag structure has wide bond angle and allows for two nearest neighbors. An intermediary structure has the ladder geometry and is formed by two strands. All these planar geometries are, however, more favored energetically than the linear chain. We found that by going from bulk to a chain the character of bonding changes and acquires directionality. The conductance of zigzag and linear chains is 4e^2/h under ideal ballistic conditions.
Stability and structure of atomic chains on Si(111)  [PDF]
Corsin Battaglia,Philipp Aebi,Steven C. Erwin
Physics , 2008, DOI: 10.1103/PhysRevB.78.075409
Abstract: We study the stability and structure of self-assembled atomic chains on Si(111) induced by monovalent, divalent and trivalent adsorbates, using first-principles total-energy calculations and scanning tunneling microscopy. We find that only structures containing exclusively silicon honeycomb or silicon Seiwatz chains are thermodynamically stable, while mixed configurations, with both honeycomb and Seiwatz chains, may be kinetically stable. The stability and structure of these atomic chains can be understood using a surprisingly simple electron-counting rule.
MRP-based negotiation in collaborative supply chains  [cached]
Bernard Grabot,Yue Ming,Raymond Houé
International Journal of Production Management and Engineering , 2013, DOI: 10.4995/ijpme.2013.1516
Abstract: Although collaboration between parteners is now considered as a mean to increase the performance of the supply chains, most of them are still managed in a directive way through cascades of classical MRP/MRP2 systems, in which the constraints of the suppliers, especially the smallest ones, are poorly taken into account. We suggest in this article to assess the interest of the integration into collaborative processes of some practices based on MRP, identified after a study in aeronautical supply chains. Within these processes, classical parameters of MRP would be negotiated instead of being imposed by the large companies.
Formation and properties of metal-oxygen atomic chains  [PDF]
W. H. A. Thijssen,M. Strange,J. M. J. aan de Brugh,J. M. van Ruitenbeek
Physics , 2007, DOI: 10.1088/1367-2630/10/3/033005
Abstract: Suspended chains consisting of single noble metal and oxygen atoms have been formed. We provide evidence that oxygen can react with and be incorporated into metallic one-dimensional atomic chains. Oxygen incorporation reinforces the linear bonds in the chain, which facilitates the creation of longer atomic chains. The mechanical and electrical properties of these diatomic chains have been investigated by determining local vibration modes of the chain and by measuring the dependence of the average chain-conductance on the length of the chain. Additionally, we have performed calculations that give insight in the physical mechanism of the oxygen-induced strengthening of the linear bonds and the conductance of the metal-oxygen chains.
Sales Rebate Contracts in Fashion Supply Chains
Chun-Hung Chiu,Tsan-Ming Choi,Ho-Ting Yeung,Yingxue Zhao
Mathematical Problems in Engineering , 2012, DOI: 10.1155/2012/908408
Abstract: We explore in this paper the performance of sales rebate contracts in fashion supply chains. We conduct both analytical and numerical analyses via a mean-variance framework with reference to real empirical data. To be specific, we evaluate the expected profits and variance of profits (risk) of the fashion supply chains, fashion retailers, and manufacturers under (1) the currently implemented sales rebate practices, (2) the case without sales rebate, and (3) the theoretical coordination situation (if target sales rebate is adopted). In addition, we analyze how sales effort affects the performances of the supply chain and its agents. Our analysis indicates that the rebate contracts may hurt the retailer and the manufacturer of a fashion supply chain when it is inappropriately set. Moreover, a properly designed sales rebate contract not only can coordinate the supply chain (with retail sales effort) but can also improve expected profits and lower the levels of risk for both the manufacturer and the retailer.
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