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Epidemiology of HIV infection in the Middle East and North Africa

Epidemiology of HIV infection in the Middle East and North Africa

Objective: The Middle East and North Africa (MENA) region continues to be perceived as a region with very limited HIV epidemiological data, raising many controversies about the status of the epidemic in this part of the world. The objective of this review and synthesis was to address the dearth of strategic interpretable data on HIV in MENA by delineating a data-driven overview of HIV epidemiology in this region.
Regulation of store-operated Ca2+ entry during the cell cycle

Regulation of store-operated Ca2+ entry during the cell cycle

Cytoplasmic Ca2+ signals are central to numerous cell physiological processes, including cellular proliferation. Historically, much of the research effort in this area has focused on the role of Ca2+ signals in cell-cycle progression.
What economics can contribute to the addiction sciences

What economics can contribute to the addiction sciences

Aims
The addiction sciences are intrinsically multi-disciplinary, and economics is among the disciplines that offer useful perspectives on the complex behaviors surrounding substance abuse. This paper summarizes contributions economics has made in the past and could make in the future towards understanding how illegal markets operate, how prices affect use, how use generates various consequences, and how policy shapes all three.
Multiscale estimation of the Freundlich adsorption isotherm

Multiscale estimation of the Freundlich adsorption isotherm

Adsorption plays an important role in water and wastewater treatment. The analysis and design of processes that involve adsorption rely on the availability of isotherms that describe these adsorption processes. Adsorption isotherms are usually estimated empirically from measurements of the adsorption process variables. Unfortunately, these measurements are usually contaminated with errors that degrade the accuracy of estimated isotherms.
Outage probability of multiuser relay networks in Nakagami-m fading channels

Outage probability of multiuser relay networks in Nakagami-m fading channels

We evaluate the performance of downlink multi-user relay networks (MRNs) equipped with a single amplify-and-forward (AaF) relay. A thorough and exact analysis is conducted to analyze the outage probability of MRNs under dissimilar Nakagami-m fading conditions.
Stem Cell Research in the Greater Middle East: The Importance of Establishing Policy and Ethics Interoperability to Foster International Collaborations

Stem Cell Research in the Greater Middle East: The Importance of Establishing Policy and Ethics Interoperability to Foster International Collaborations

While fossil fuel reserves have strengthened the economies of numerous countries in the Greater Middle East (GME) for decades, multiple nations within this region are now increasingly investing in internal science and engineering programs as a mechanism to develop more extensive knowledge-based economies.
An Inverse Problem for Sturm-Liouville Operators on Arbitrary Compact Spatial Networks

An Inverse Problem for Sturm-Liouville Operators on Arbitrary Compact Spatial Networks

An inverse spectral problem is studied for Sturm-Liouville differential operators on arbitrary compact graphs (spatial networks). A uniqueness theorem of recovering operators from their spectra is proved, and a constructive procedure for the solution of the inverse problem is provided.
Soliton tunneling in the nonlinear Schrodinger equation with variable coefficients and an external harmonic potential

Soliton tunneling in the nonlinear Schrodinger equation with variable coefficients and an external harmonic potential

We report on the nonlinear tunneling effects of spatial solitons of the generalized nonlinear Schrodinger equation with distributed coefficients in an external harmonic potential. By using the homogeneous balance principle and the F-expansion technique we find the spatial bright and dark soliton solutions.
Inverse problems for Sturm-Liouville equations with boundary conditions polynomially dependent on the spectral parameter

Inverse problems for Sturm-Liouville equations with boundary conditions polynomially dependent on the spectral parameter

Sturm-Liouville differential operators in a finite interval with boundary conditions depending polynomially on the spectral parameter are studied. We establish the properties of the spectral characteristics and investigate three inverse problems of recovering the operator either from the so-called Weyl function, or from discrete spectral data or from two spectra.
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DeSIGN: Guided Practice for Sign Language

DeSIGN: Guided Practice for Sign Language

Children learn and practice their vocabulary through interaction with parents and friends as well as through formal instruction at school. However, for deaf children, sign language is the main...
Calcium channels determine how life begins, and ends
Calcium channels determine how life begins, and ends

Calcium channels determine how life begins, and ends

Ongoing work at Weill Cornell Medical College in Qatar (WCMC-Q) is investigating how intracellular calcium (Ca2+) signaling pathways are involved in the very beginning of life as they prepare the...
Taking gas-to-liquid technology to the next level
Taking gas-to-liquid technology to the next level

Taking gas-to-liquid technology to the next level

In the 1920s, two German scientists—Franz Fischer and Hans Tropsch—developed revolutionary chemical reactions that could transform gas into liquid. These reactions proved particularly...
Researchers build the case for wind and wave studies in Qatar
Researchers build the case for wind and wave studies in Qatar

Researchers build the case for wind and wave studies in Qatar

For the first time, fine detail about the wind and wave conditions around the coast of Qatar has been recorded. By arranging the most sophisticated equipment available on the edge of a 500-meter...
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