introduction: to identify of motivates and barriers to growth is one of the most important issues in the economic growth literature. introducing endogenous growth models by lucas (1988) and romer (1989) and the development of this theory in the 1990s, making it possible to include economical, political and social variables in economic theories to test them empirically. corruption is one of the ...

We examine the relation between venture capital (VC) investments and mergers and acquisitions (M&A) activity around the world. We find evidence of a strong positive association between VC investments and lagged M&A activity, consistent with the hypothesis that an active M&A market provides viable exit opportunities for VC companies and therefore incentivizes them to engage in more deals. We als...

A cover of a hypergraph is a collection of edges whose union contains all vertices. Let H = (V, E) be a k-uniform, D-regular hypergraph on n vertices, in which no two vertices are contained in more than o(D/e log D) edges as D tends to infinity. Our results include that if k = o(log D), then there is a cover of (1 + o(1))n/k edges, extending the known result that this holds for fixed k. On the ...

one of the most traditional architecture and urban planning patterns is bazaar. the aim of this paper is studying social, economical and architectural features of traditional bazaars. the claim of this study is that they are significant relationship between social and economical values of bazaars with their architectural values. bazaar usually is located along the main routes of the city and ex...

Nasuh, Known as Matrakci was a miniature painter who accompanied King Suleiman Kanuni during hiscampaign to Iran in 940-42 AH/1533-36 AD and he has drawn many miniature from lots of Iranian cities including Khoy, Tabriz, Zanjan, Soltaniyeh, Hamedan, and Ghasre Shirin to Baghdad and Shahre Zur, Baneh, Bukan, Maraghe. Being capital during one part of the Safavid dynasty and in the other part as t...

This paper presents a performance analysis of the potential study in complementing grid utility supply with renewable energy system. A general-purpose building consisting office and laboratory facility has been chosen as test case hybrid system fuel cell solar photovoltaic cells installed addition to existing power supply. HOMER simulation software was used run simulations, results showed that ...

For energy saving retrofit projects, its economics are usually evaluated in terms of capital investment and payback time. The capital investment is in direct relation to the total heat recovery area of the network and the payback time factor is base on both the area and the energy savings. The debottlenecking is an increased throughput, which can be profitable in economic sense. The combination...