scholarly journals Associated graphs and chain maps

2016 ◽  
Vol 37 (1) ◽  
pp. 7-20
Author(s):  
E. EL-Kholy ◽  
N. El-Sharkawey
Keyword(s):  
Foods ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 539 ◽  
Author(s):  
Foivos Anastasiadis ◽  
Ioanna Apostolidou ◽  
Anastasios Michailidis

Sustainable food supply chains are complex systems involving several stakeholders, processes, flow of goods/materials and information. The value generated in combination with the contradictory agendas among actors makes any groundwork for future research a challenging endeavor. Hence, an end-to-end mapping of the food supply chain under examination is a vital prerequisite for the design of a comprehensive research framework. This study exemplified such a mapping approach in the Greek sustainable tomato supply chain, providing significant insights for an impactful research agenda. Data were obtained from secondary sectoral sources and open interviews with key players across the supply chain—covering all its main stages, i.e., production, packaging, storing, transportation, wholesaling, and retailing. The findings are summarized in three supply chain maps that illustrate the areas concerning sustainability, value chain and stakeholders. These maps synthesize a bigger picture of the supply chain that reveals the complicated interactions among its actors, the hidden bottlenecks in the flow of information and the areas that need deeper exploration. Its fundamental implication is the design of a targeted research framework, underlying the main priorities of the Greek tomato supply chain and eventually the Greek agri-food sector.


Nature ◽  
1985 ◽  
Vol 314 (6008) ◽  
pp. 271-273 ◽  
Author(s):  
Zlatko DembiĆ ◽  
Wilhelm Bannwarth ◽  
Benjamin A. Taylor ◽  
Michael Steinmetz

2011 ◽  
Vol 20 (01) ◽  
pp. 127-139
Author(s):  
NOBORU ITO

Explicit chain homotopy maps and chain maps for the Reidemeister moves of Khovanov homology are often useful for several proofs of the isotopy invariance of Khovanov homology. However, such maps are missing except for the first Reidemeister moves given by Viro. In this paper, such chain homotopy maps and chain maps are obtained explicitly for the second and third Reidemeister moves (Sec. 2). Some applications are given to show the usefulness of these maps (Sec. 3).


Author(s):  
M. Z. Kazemi-Baneh

The homotopy of chain maps on preabelian categories is investigated and the equality of standard homologies andd-homologies of homotopic chain maps is established. As a special case, ifXandYare the same homotopy type, then theirnthd-homologyR-modules are isomorphic, and ifXis a contractible space, then itsnthd-homologyR-modules forn≠0are trivial.


2018 ◽  
Vol 51 (11) ◽  
pp. 1726-1731 ◽  
Author(s):  
Pascal Wichmann ◽  
Alexandra Brintrup ◽  
Simon Baker ◽  
Philip Woodall ◽  
Duncan McFarlane

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2859
Author(s):  
Foivos Anastasiadis ◽  
Maria Alebaki

The wine industry involves both the production (i.e., from vine to wine) and consumption of wine (i.e., dining and tourism experiences). This results in a complicated system of intertwined product and services supply chains. Recent studies in the field suggest several key perspectives for future research, such as sustainability, resilience and circular economy. However, the complex nature of the sector which comprises numerous stakeholders and flows (i.e., products—services—information), entailing knotty interactions and interdependencies, makes any research direction questionable in terms of its effectiveness. Therefore, the objective of this study is to provide a tool for designing targeted future research in such multiple environments. We employed an end-to-end mapping approach using data from the Greek wine supply chain, identifying essential insights for a compelling research agenda. The key output is a set of three supply chain maps revealing the structure, processes and actors from all the main angles: basic production, value chain and stakeholders. A synthesis of these maps supports an overall understanding of the sector, unmasking any interaction and hidden information holdups. The study thus aims to offer an integrated research framework that highlights the leading priorities of the Greek wine industry.


1964 ◽  
Vol 60 (4) ◽  
pp. 721-735 ◽  
Author(s):  
G. M. Kelly

There is a sense in which the homology group HA of a free Abelian chain complex A may be said to be a ‘complete system of invariants’ of A, to within chain equivalence; certainly any graded Abelian group G is isomorphic to HA for a suitable A, and if HA and HB are isomorphic then A and B are chain equivalent. Such a result is useful in showing that it is fruitless to seek other homotopy invariants of A; whatever depends only on the homotopy class of A depends only on HA, so that we can, for instance, predict the existence of a formula giving H(A ⊗ G), to within isomorphism, in terms of HA and G. The theorem on the existence and uniqueness to within chain equivalence of projective resolutions of modules is a variant of the above theorem, more general in one direction and more special in another.


2010 ◽  
Vol 29-32 ◽  
pp. 1274-1278
Author(s):  
Wan Chun Zhou ◽  
Tong Zhou

In this thesis, the author first analyzed the topological structure of the original mechanism. On this basis, the topological map and a series of kinematic chain maps which meet the requirements have been constructed with graph theory. Then the types of various components were designated based on specific design constraints, and generalized kinematic chains were turned into the new mechanism having the same or similar function with the original mechanism. Designers can value them comprehensively and screen out the good structural type. The method is regarded as a workable and efficient method for development and design of new products.


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