نتایج جستجو برای: f20

تعداد نتایج: 234  

Journal: :تحقیقات اقتصادی 0
زهرا زمانی دکتری اقتصاد، دانشگاه اصفهان سید کمیل طیبی استاد گروه اقتصاد، دانشگاه اصفهان ایرج کاظمی دانشیار گروه آمار، دانشگاه اصفهان

in the era of globalization, particularly, since early 1990s, economies around the world have been affected considerably by co-movements in one or more countries. in the literature this phenomenon is recognized as synchronization in business cycles, while joint policies being conducted by trading partners can modify such effects properly. the objective of this paper has been to evaluate a possi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان 1389

گراف های فاصله-منظم در سال های پایانی دهه چهل قرن بیستم مورد توجه قرار گرفتند. مسائل زیادی از اردوش درخصوص این گراف ها وجود دارد که حل آن ها کمک زیادی به پیشرفت در این زمینه می کند. در این پایان نامه حاصل ضرب های تانسوری، حاصل جمع قوی و حاصل ضرب قوی گراف ها مورد بررسی قرار گرفته اند. هم چنین حاصل ضرب گراف های فاصله-منظم مورد مطالعه قرار گرفته و در بین نانو ساختارهایی که مطالعه کرده ایم، نشان دا...

2003
C. Wigger

The Gamma-ray instruments on-board INTEGRAL offer an unique opportunity to perform time resolved analysis on GRBs. The imager IBIS allows accurate positioning of GRBs and broad band spectral analysis, while SPI provides high resolution spectroscopy. GRB 030501 was discovered by the INTEGRAL Burst Alert System in the ISGRI field of view. Although the burst was fairly weak (fluence F20−200 keV ≃ ...

1999
Mikhail Shtogrin

We explore some generalizations of fullerenes Fv (simple polyhedra with v vertices and only 5and -gonal faces) seen as (d−1)dimensional simple manifolds (preferably, spherical or polytopal) with only 5and 6-gonal 2-faces. First, finite and planar (infinite) 3-fullerenes are described. Three infinite families of spherical 4fullerenes are presented in Sections 4-6. The Construction A gives 4-poly...

1999
H. A. Atwater Thomas J. Watson

We describe the evolution of microstructure during ultrahigh vacuum ion beam sputter deposition of Cu (00 1) at room temperature on hydrogen-terminated Si (00 1) . In situ reflection high energy electron diffraction indicates growth of an epitaxial Cu (001) film on Si (001) with the intensity of the Bragg rods sharpening during 5-20 nm of Cu film growth. Post-growth x-ray diffraction indicates ...

2007
Andrew Burke Holger Görg Aoife Hanley

The paper examines the impact of Foreign Direct Investment (FDI) on the survival of business start-ups. FDI has potential for both negative displacement/competition effects as well as positive knowledge spillover and linkage effects on new ventures. We find a net positive effect for the whole dataset. However, a major contribution of the paper is to outline and test an argument that this effect...

2011
Zanxia Cao Lei Liu Liling Zhao Jihua Wang

The aim of this work is to investigate the effects of different force fields and temperatures on the structural character of Aβ (12-28) peptide in aqueous solution. Moreover, the structural character of Aβ (12-28) peptide is compared with other amyloid peptides (such as H1 and α-syn12 peptide). The two independent temperature replica exchange molecular dynamics (T-REMD) simulations were complet...

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