The gravity model

This study is to evaluate the precision of some new global Earth Gravitational Models in the East Vietnam Sea, selecting the best model. The method and the program for calculating Free air gravity anomaly from the global earth gravitational model have been researched and developed. Evaluation of the precision of the models is done by comparing the models with ship-derived gravity anomalies. Data with anomalous signs are detected and removed when the deviation exceeds three times the root mean square deviation.

13p dianmotminh02 03-05-2024 1 1   Download

In this paper, we made the first attempt to analyze the impact of tariffs on Vietnam’s export of Mach and Elec products to partners within CPTPP. This study utilized a modified gravity model and simultaneous quantile regression to analyze Vietnam’s export turnover of machinery and electronic products to 10 CPTPP member countries from 2005 to 2020 on different quantiles of the export distribution.

14p viohoyo 25-04-2024 3 1   Download

This article explores the determinants of interregional labour migration in southern Russian regions. Using a basic gravity model with very specialized variables (working-age population, the nearest distance between the administrative regional centres) we partially confirmed hypotheses concerning the presence of a gravitational link between separate regions in southern Russia.

7p longtimenosee07 29-03-2024 5 2   Download

Ebook "Gravity, special relativity, and the strong force: A Bohr-Einstein-de broglie model for the formation of hadrons" shows that the strong interaction forces, which keep hadrons and nuclei together, are relativistic gravitational forces exerted between very small particles in the mass range of neutrinos. First, this book considers the motion of two or three charged particles under the influence of electrostatic and gravitational forces only, which shows that bound states are formed by following the same semi-classical methodology used by Bohr to describe the H atom.

155p manmanthanhla0201 26-02-2024 1 1   Download

Part 1 book "The cellular automaton interpretation of quantum mechanics" includes content: Motivation for this work, deterministic models in quantum notation, interpreting quantum mechanics, deterministic quantum mechanics, concise description of the ca interpretation, quantum gravity, information loss, alleys to be further investigated and open questions,... and other contents.

141p muasambanhan07 08-02-2024 2 0   Download

This paper evaluates the effects of the EU-Vietnam Free Trade Agreement (EVFTA) and the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) on Vietnam’s trade flow. The study employed a gravity model with two panel datasets.

15p vibego 02-02-2024 4 2   Download

This study aims to empirically measure the effect of logistics performance on Vietnam’s imports based on the trade gravity model. Using panel data of bilateral trade between Vietnam and 116 trading partners during the period 2007-2018, we find a significantly positive effect of logistics on Vietnam’s imports.

6p vigojek 02-02-2024 9 2   Download

This paper presents the modeling and control of a Novel Structure of the four Degrees of Freedom (4DOF) Hybrid Magnetic Bearings (HBMs) with a rigid rotor. In which, the centralized PD control is applied to control the HBM at its center coordinates.

8p vijeff 01-12-2023 6 3   Download

Part 1 of ebook "Handbook of international economics (Volume 4)" provides readers with contents including: Chapter 1 - Heterogeneous firms and trade; Chapter 2 - Multinational firms and the structure of international trade; Chapter 3 - Gravity equations, workhorse,toolkit, and cookbook; Chapter 4 - Trade theory with numbers, quantifying the consequences of globalization; Chapter 5 - Domestic institutions as a source of comparative advantage;...

341p dangsovu 20-10-2023 10 5   Download

The introduction to this paper is provided in Section 1, while the computational program is described in detail in Section 2. The study results and evaluations are presented and discussed in Sections 3 and 4, respectively.

9p vimulcahy 02-10-2023 5 2   Download

Since then, Vietnam has actively participated in numerous free trade agreements with the aim of forming and developing a socialist-oriented market economy, managed and regulated by the State. Typically, the Vietnam-US Bilateral Trade Agreement (BTA) was signed in 2000 between the two countries.

8p vimulcahy 18-09-2023 12 5   Download

This paper investigates the effects of economic sanctions (ES) on global banking flows (GBF) using 4,022 pairs of 207 countries during the period 1995-2018. We use a structural gravity model combined with the rich Global Sanction DataBase introduced by Felbermayr et al. (2020, 2021).

17p viindra 06-09-2023 8 4   Download

This paper attempt to analyze the link between TBT and SPS measures on Vietnam’s seafood export to major destinations namely the US, the EU, Korea, Japan and China. To tackle this problem, the author first offers a thorough review of the literature related to evaluation of trade barriers and specifically non-tariff barriers on trade to obtain a comprehensive view of estimation methods and data used.

10p viindra 06-09-2023 5 2   Download

Ebook Facts on file science experiments: Space and astronomy experiments - Part 2 includes contents: Chapter 10: how does light intensity vary with distance?; chapter 11: flashlight magnitude; chapter 12: how long is twilight?; chapter 13: acceleration due to gravity; chapter 14: the law of inertia; chapter 15: who knows ten constellations?; chapter 16: the size of the universe; chapter 17: rocket science; chapter 18: measuring the altitude and speed of a model rocket; chapter 19: building a cross-staff; chapter 20: the parallax effect.

94p haojiubujain03 09-08-2023 8 4   Download

Searching for the origin of the dark matter and the dark energy is among the problems that the modern physics, including the general theory of relativity, is facing to. Various theories or models have been proposed to solve these problems without satisfactory success yet.

12p viberkshire 09-08-2023 6 5   Download

This study will provide an insight about the exports of environmental products from Vietnam, the determinants impacting on the export performance and focus on the APEC list of environmental goods that is consisted of 54 commodities in 54 different 6 digit HS code. By using stochastic frontier gravity model for the panel data of top 20 partner countries and regions of Vietnam on environmental goods exports from 2001 to 2016, the estimated results illustrate that GDP of partners nations, participating in the ASEAN and exchange rate have positive impacts on the exports of Vietnam.

12p nhanchienthien 25-07-2023 7 3   Download

This study utilizes the gravity model and various estimation methods such as OLS, FGLS, and GMM to analyze the effects of bilateral trade and other factors on migration flows in ASEAN countries. Specifically, the study examines the impacts of population, gross domestic product per capita, rule of law, human development index, and the contiguous border between two countries.

10p viwolverine 11-07-2023 8 4   Download

The main aims of physical geodesy are to study the shape of the Earth, its gravity field and the geoid which is an equipotential surface closest to the mean sea level. Precise geoid determination has been an important research topic in geodesy and geophysics in the past two decades. Scientists and government agencies all around the world have made great efforts on the development of highaccuracy geoid models.

182p runthenight07 01-03-2023 7 2   Download

Trade and world economic integration are seen as the impetus for accelerating the well-beings of the domestic Vietnamese communities and international community in the region. However, an understanding of the link between trade and economic integration from the perspective of Vietnam is missing. Empirical studies on Vietnamese trade are in lack to address these determinants (see, Le, 1996; Nguyen, 2010). This thesis identifies the key factors that have driven the impressive growth of Vietnamese exports during the world economic integration process (1986-2010).

473p runthenight04 02-02-2023 3 2   Download

The main aims of physical geodesy are to study the shape of the Earth, its gravity field and the geoid which is an equipotential surface closest to the mean sea level. Precise geoid determination has been an important research topic in geodesy and geophysics in the past two decades. Scientists and government agencies all around the world have made great efforts on the development of high-accuracy geoid models.

182p runthenight04 02-02-2023 7 3   Download