نتایج جستجو برای: gravity model

تعداد نتایج: 2153001  

2007
RICHARD SEAGER MARK A. CANE

A model for the climatological mean sea surface temperature (SST) of the tropical Pacific Ocean is developed. The upper ocean response is computed using a time dependent, linear, reduced gravity model, with the addition of a constant depth frictional surface layer. The full three-dimensional temperature equation and a surface heat flux parameterization that requires pecification ofonly wind spe...

2016
K. F. Au

Endowed with abundant supply of raw materials and low labor cost Asian countries have become the world’s largest exporters of apparel products for the past few decades. In 2007, the value of Asian suppliers’ total apparel exports to the world amounted to US$ 165 billion which represented 52% of the world’s total apparel exports. The gravity trade model is utilized with an exploration at the agg...

Journal: :Revue Internationale de Géomatique 2016
Hadrien Commenges

Simini, González, Maritan et Barabási recently proposed a “universal model for mobility and migration patterns” : the radiation model. They compare the radiation model to the gravity model and conclude that the latter suffers important theoretical inconsistencies and systematic predictive discrepancies. By confronting both models, they address crucial issues about formalisms and usages of spati...

2000
Dilip Kumar Ghosh

We study the process ee → ee at a high energy ee collider including the effect of graviton exchanges in the warped gravity model of Randall and Sundrum. Discovery limits for gravitons are established and the effects of polarization are discussed.

2003
Lorenzo Iorio

In this paper we calculate explicitly the secular classical precessions of the node Ω and the perigee ω of an Earth artificial satellite induced by the static, even zonal harmonics of the geopotential up to degree l = 20. Subsequently, their systematic errors induced by the mismodelling in the even zonal geopotential coefficients Jl are compared to the general relativistic secular gravitomagnet...

2005
Thushyanthan Baskaran Tilman Brück

The paper analyzes the network structure of international trade. Adapting a network approach developed in the physical sciences, we propose that international trade functions like a scale-free network. For each commodity group we calculate a characteristic parameter which reflects the structure of its trading network. We then insert this variable into an expanded gravity model to explore the ef...

2015
Andreas Backhaus Inmaculada Martinez-Zarzoso Chris Muris

© A m Abstract: This paper investigates to what extent international migration can be explained by climatic variations. A gravity model of migration augmented with average temperature and precipitation in the country of origin is estimated using a panel data set of 142 sending countries for the period 1995 to 2006. We find two primary results. First, temperature is positively correlated with mi...

2013
Normaz Wana Ismail Collin Wong Koh King

The ASEAN Free Trade Agreement (AFTA) was set up in 1993 and has already shown significant effects by 2010. This study empirically investigates the effect of trade creation on intra-ASEAN trade for the period of 1986 to 2010. Using the gravity model, we find that major determinants of bilateral trade in ASEAN are GDP, population, relative endowment, distance and common border. A dummy variable ...

2004
Lorenzo Iorio

Recently Ciufolini has suggested to use the perigee of the proposed LARES/WEBER-SAT satellite in order to measure the secular precession which would be induced on such Keplerian orbital element by a weak-field modification of gravity occurring in some Brane-World scenarios put forth by Dvali. This precession would amount to 0.04 milliarcseconds per year for LARES. In this paper we show that, ac...

2002
Carlos Carrillo Carmen A Li

We apply the gravity model to examine the effects of the Andean Community and Mercosur on both intra-regional and intra-industrial trade in the period 1980-1997. After accounting for size and distance effects, the Andean Community preferential trade agreements had a significant effect on both the differentiated and reference products, in particular capital intensive goods. In contrast, Mercosur...

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