Export-led Growth in Bangladesh: A Time Series Analysis

This article examines time series evidence to investigate the link between exports and economic growth in Bangladesh. Using quarterly data for a period from 1976 to 2003 the article finds that industrial production and exports are cointegrated. The results of an error correction model (ECM) suggest that there is a long-run unidirectional causality from exports to growth in Bangladesh

Workers\u27 Migration and Remittances in Bangladesh

Bangladesh has sent more than 6.7 million workers to over 140 countries during a period of more than three decades since the mid-1970s. Most of these workers temporarily migrated to work in Middle East and Southeast Asia. This mass movement of temporary migrant workers has, to some extent, eased unemployment pressures on the over-burdened labor market in this highly populated country. More importantly, the remittance transfers received from these migrant workers have reached a phenomenal level of over 10 billion US dollars in 2009, approximately 12 percent of GDP in Bangladesh. This paper analyzes the trends and various other aspects of workers\u27 migration and remittances in Bangladesh. It further discusses the micro and macroeconomic impacts of remittances. While most remittance transfers have been used by migrant-sending households for consumption, there is evidence to show that these transfers have helped reduce poverty in Bangladesh. The analysis presented in this paper further indicates that these remittances may have significant effects on other macroeconomic variables as well

Bright soliton trains of trapped Bose-Einstein condensates

We variationally determine the dynamics of bright soliton trains composed of harmonically trapped Bose-Einstein condensates with attractive interatomic interactions. In particular, we obtain the interaction potential between two solitons. We also discuss the formation of soliton trains due to the quantum mechanical phase fluctuations of a one-dimensional condensate.Comment: 4 pages, 2 figures, submitted to PR

Soliton response to transient trap variations

The response of bright and dark solitons to rapid variations in an expulsive longitudinal trap is investigated. We concentrate on the effect of transient changes in the trap frequency in the form of temporal delta kicks and the hyperbolic cotangent functions. Exact expressions are obtained for the soliton profiles. This is accomplished using the fact that a suitable linear Schrodinger stationary state solution in time can be effectively combined with the solutions of non-linear Schrodinger equation, for obtaining solutions of the Gross-Pitaevskii equation with time dependent scattering length in a harmonic trap. Interestingly, there is rapid pulse amplification in certain scenarios

Two-component Bose gas in an optical lattice at single-particle filling

The Bose-Hubbard model of a two-fold degenerate Bose gas is studied in an optical lattice with one particle per site and virtual tunneling to empty and doubly-occupied sites. An effective Hamiltonian for this system is derived within a continued-fraction approach. The ground state of the effective model is studied in mean-field approximation for a modulated optical lattice. A dimerized mean-field state gives a Mott insulator whereas the lattice without modulations develops long-range correlated phase fluctuations due to a Goldstone mode. This result is discussed in comparison with the superfluid and the Mott-insulating state of a single-component hard-core Bose.Comment: 11 page

Beyond Patient Reported Pain: Perfusion Magnetic Resonance Imaging Demonstrates Reproducible Cerebral Representation of Ongoing Post-Surgical Pain

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

Implementation of six sigma in Australian manufacturing small and medium enterprises

The present study discusses the status of quality management practices in manufacturing SMEs in Australia and investigates the reasons why they are not implementing the Six Sigma methodology. This study emphasises that Six Sigma can be implemented in manufacturing SMEs. Moreover, this study identifies the motivation for adopting Six Sigma by Australian manufacturing SMEs. A Six Sigma implementation framework is developed and presented

Mermin-Ho vortex in ferromagnetic spinor Bose-Einstein condensates

The Mermin-Ho and Anderson-Toulouse coreless non-singular vortices are demonstrated to be thermodynamically stable in ferromagnetic spinor Bose-Einstein condensates with the hyperfine state F=1. The phase diagram is established in a plane of the rotation drive vs the total magnetization by comparing the energies for other competing non-axis-symmetric or singular vortices. Their stability is also checked by evaluating collective modes.Comment: 4 pages, 4 figure

The Detection of IVT Over Iraq and Surrounding Region and the links to Precipitation Over Iraq

This study examines the impact of low-level vertically integrated moisture flux (IVT) features on precipitation in Iraq and surrounding areas during the rainy season. The study calculates and analyzes the IVT across the region. It identifies the maximum precipitation linked with IVT from January to December (1981-2020). In addition, it determines the IVT threshold for each month using wind component data (u, v) and specific humidity data. The findings reveal that IVT has a greater impact in dry and semi-arid areas, the Mediterranean Sea and the Red Sea are the main sources of IVT. The Red Sea has an impact on Iraqs south and south-central region while the Mediterranean Sea has an impact on Iraqs north and north- central region. The study also finds a strong correlation between IVT and precipitation over Iraq during the rainy season with the amount of precipitation largely influenced by the intensity and direction of IVT. The results suggest that IVT transfer from the Mediterranean and Red Seas has a significant impact on the amount of precipitation over Iraq and the neighboring areas

Spinor Bose-Einstein Condensates with Many Vortices

Vortex-lattice structures of antiferromagnetic spinor Bose-Einstein condensates with hyperfine spin F=1 are investigated theoretically based on the Ginzburg-Pitaevskii equations near $T_{c}$. The Abrikosov lattice with clear core regions are found {\em never stable} at any rotation drive $\Omega$. Instead, each component $\Psi_{i}$ $(i=0,\pm 1)$ prefers to shift the core locations from the others to realize almost uniform order-parameter amplitude with complicated magnetic-moment configurations. This system is characterized by many competing metastable structures so that quite a variety of vortices may be realized with a small change in external parameters.Comment: 4 page