scholarly journals On the chain-level intersection pairing for PL manifolds

2006 ◽  
Vol 10 (3) ◽  
pp. 1391-1424 ◽  
Author(s):  
J E McClure
Keyword(s):  
Intersection Pairing ◽  
Level Intersection ◽  
Chain Level

Relations in the tautological ring derived from combinatorial classes and hyperelliptic fatgraphs

2008 ◽  
Vol 144 (2) ◽  
pp. 369-395
Author(s):  
ALEX JAMES BENE
Keyword(s):  
Moduli Space ◽  
Cell Decomposition ◽  
Integration Scheme ◽  
Weighted Sum ◽  
Closed Formula ◽  
Moduli Space Of Curves ◽  
Hodge Integrals ◽  
Tautological Ring ◽  
Level Intersection ◽  
Chain Level

AbstractA closed formula is obtained for the integral$\int_{\Hgbs^1}\kappa_{1}\psi^{2g-2}$of tautological classes over the locus of hyperelliptic Weier points in the moduli space of curves. As a corollary, a relation between Hodge integrals is obtained.The calculation utilizes the homeomorphism between the moduli space of curves$\M_{g,1}$and the combinatorial moduli space$\Mc_{g,1}$, a PL-orbifold whose cells are enumerated by fatgraphs. This cell decomposition can be used to naturally construct combinatorial PL-cycles$W_a\subset\Mc_{g,1}$whose homology classes are essentially the Poin duals of the Mumford–Morita–Miller classes κa. In this paper we construct another PL-cycle$\Hgc \subset \Mc_{g,1}$representing the locus of hyperelliptic Weier points and explicitly describe the chain level intersection of this cycle withW1. Using this description of$\Hgc\cap W_1$, the duality between Witten cyclesWaand the κaclasses, and the Kontsevich--Penner method of integration, scheme of integrating ε classes, the integral$\int_{\Hgbs^1}\kappa_{1}\psi^{2g-2}$is reduced to a weighted sum over graphs and is evaluated by the enumeration of trees.

scholarly journals THE IMPACT OF THE COVID-19 PANDEMIC ON SUPPLY CHAINS IN THE AUTOMOTIVE INDUSTRY

2020 ◽  
Author(s):  
Goran Milovanovic ◽  
◽  
Tamara Stankovic ◽  
Keyword(s):  
Supply Chain ◽  
Supply Chains ◽  
Automotive Industry ◽  
Business Relationships ◽  
Automotive Supply Chain ◽  
Automotive Supply ◽  
The Impact ◽  
Insight Into ◽  
Chain Level

Health crises have an impact on supply chains, mainly by disrupting their regular activities. In this research, the authors have analyzed the impact that the Covid-19 pandemic has made on business relationships between supply chain partners in the automotive industry and their suppliers, which are mostly from territories where the initial outbreak of the SARS COV 2 virus occurred. The analysis shows that in some cases, there is a strong dependency between the pandemic and production levels. Being dependent prevents supply chains from maintaining stability and causes system vulnerabilities. The authors conclude their work with a thesis on the pronounced impact of the current pandemic on automotive supply chain activities. For the analysis to be complete, it is necessary to monitor changes in production levels further, since data for the current year still does not provide a realistic insight into all the consequences at the supply chain level.

Sustainable Supply Chain Development

2019 ◽  
pp. 81-102
Author(s):  
Shounak Basak ◽  
Sudhanshu Shekhar ◽  
Kushal Saha
Keyword(s):  
Energy Efficiency ◽  
Supply Chain ◽  
Energy Management ◽  
Balance Sheet ◽  
Sustainable Supply Chain ◽  
Chain Operation ◽  
Challenges And Opportunities ◽  
Supply Chain Operation ◽  
Chain Level

Sustainability has assumed increased importance in view of the international focus on pollution control and climate change. Specifically, the development of sustainable supply chain can help in important ways to reduce pollution and address environmental concerns. Energy efficiency forms an important aspect of this movement towards sustainable supply chain. Energy efficiency can be achieved through judicious energy management initiatives at the supply chain level. A metrics-based approach provides an effective mechanism to implement energy management programs in supply chain operation. The chapter explores the utility of energy balance sheet as a metric to implement such energy management programs. It further looks at the challenges and opportunities faced by supply chain partners in implementing energy management programs. It uses the case study of Firozabad glass industry to illustrate the implementation of energy management for developing sustainable supply chain.

An Analysis of Factors that Influence the Ability of SMEs to Derive Benefit in Four Phases of Electronic Commerce

2003 ◽  
pp. 97-110
Author(s):  
Stephen B. Chau ◽  
Paul Turner
Keyword(s):  
Supply Chain ◽  
Electronic Commerce ◽  
External Factors ◽  
Third Party ◽  
Preliminary Review ◽  
Internal Factors ◽  
Web Based ◽  
Potential Benefits ◽  
The Relationship ◽  
Chain Level

This paper builds on research presented by the authors at IRMA 2001. Previous research by Chau and Turner (2001b) adapted the work of Venkatraman (1994) to explore the relationship between the degree of SME organisational transformation and potential benefits derived from e-commerce. The qualitative data explored reveals various factors that influence SME’s ability to derive benefit from conducting Web-based e-commerce. A preliminary review suggests that these factors can be distinguished into internal factors (organisational and technological) and external factors (nature of supply chain, level of service provided by third party organisations, industry influence, and government assistance). This paper discusses these factors and their implications for modelling e-business organisational transformation.

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