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89.900  Articles
1 of 8.990 pages  |  10  records  |  more records»
A zero-sum flow is an assignment of nonzero integers to the edges such that the sum of the values of all edges incident with each vertex is zero, and we call it a zero-sum k-flow if the absolute values of edges are less than k. We recall the zero-sum flow... see more

We generalise to signed graphs a classical result of Tutte [Canad. J. Math. 8 (1956), 13—28] stating that every integer flow can be expressed as a sum of characteristic flows of circuits. In our generalisation, the rôle of circuits is taken over by signed... see more

Beyond energy efficiency, there are now urgent challenges around the supply of resources, materials, energy, food and water. After debating energy efficiency for the last decade, the focus has shifted to include further resources and material efficiency. ... see more

In order to satisfy the requirements of Directive 2010/31/EU for Zero Energy Buildings (ZEB), innovative solutions were investigated for building HVAC systems. Horizontal air-ground heat exchangers (HAGHE) offer a significant contribution in reducing ener... see more

This paper addresses a general stochastic user equilibrium (SUE) traffic assignment problem (TAP) for transport networks with electric vehicles (EV), where EV paths are restricted by the EV driving range limits. A minimization model for path-constrained S... see more

Abstrak. Sebagian besar wilayah Indonesia memiliki potensi curah hujan yang tinggi rata-rata berkisar 2000 - 4000 mm/tahun.  Curah hujan merupakan salah satu sumber air bersih yang ekonomis dan bisa dimanfaatkan secara langsung. Namun sebaliknya, huj... see more

Linkages between rural and urban areas assist numerous regions in a variety of ways. As a meeting place for villages and cities, a small town with hinterlands of agricultural areas acts as a market for village commodities, intermediary markets in larger m... see more

Abstrak. Sebagian besar wilayah Indonesia memiliki potensi curah hujan yang tinggi rata-rata berkisar 2000 - 4000 mm/tahun.  Curah hujan merupakan salah satu sumber air bersih yang ekonomis dan bisa dimanfaatkan secara langsung. Namun sebaliknya, huj... see more

The Sidimpuan snake fruit (Salacca sumatrana Becc.) tree flowers throughout the year. However, the fruits are produced seasonally. The level of production is directly related to flowering and fruit set. A low level of fruit formation results in a low numb... see more

1 of 8.990 pages  |  10  records  |  more records»