OBJECTIVES To determine whether middle-aged persons with depressive symptoms are at higher risk for developing activity of daily living (ADL) and mobility limitations as they advance into older age than those without. DESIGN Prospective cohort study. SETTING The Health and Retirement Study (HRS), a nationally representative sample of people aged 50 to 61. PARTICIPANTS Seven thousand two h...

Oman has made tremendous progress in the last four decades on the back of rising oil prices and this has led to substantial economic activity in oil, construction, industries and services sectors creating an unprecedented demand for labor ranging from professionals, technical experts, educators, highly skilled people in all vocations to low and semi-skilled people including cleaners, gardeners,...

Five decades ago, Inglehart for the first time described and explained an unprecedented transformation of political cultures in advanced industrial societies, which he called “silent revolution.” It was characterized by emergence those countries postmaterialist values as result a sustained period economic growth, profound impact on people’s attitudes behavior. As China has experienced extraordi...

The end of the last solar cycle was at least 3 years late, and to date, the new solar cycle has seen mainly weaker activity since the onset of the rising phase toward the new solar maximum. The newspapers now even report when auroras are seen in Norway. This paper is an update of our review paper written during the deepest part of the last solar minimum [1]. We update the records of solar activ...

a caricature of science that I do not recognize. Why do social scientists find science so difficult to fathom? In my experience, most working scientists have a much better appreciation of the power — and the limitations — of the scientific method than Collins is prepared to allow. Most have a robust understanding of Karl Popper's idea of falsification, of the impact of experimental error and th...

Networking of active and passive safety systems is the fundamental basis for comprehensive vehicle safety. Situation-relevant information relating to driver reactions, vehicle behavior and nearfield traffic environment are fed into a crash probability calculator, which continually assesses the current crash risk and intervenes when necessary with appropriate measures to avoid a crash and reduce...

Graphene exhibits a range of exceptional physical properties and holds great promise for development of novel bulk materials for widespread applications. Properly engineering of assembled structures of graphene at multiple length scales is essential to realize its full potential in bulk forms. In this Concept article, we highlight the unique colloidal and gelation behavior of a commonly used pr...

Reversible encapsulation allows the temporary isolation of molecules in very small spaces. There, molecular behavior is quite different than that in bulk solvent; in capsules recognition can be amplified, reactive intermediates can be stabilized, reactions can be accelerated or even catalyzed and new reaction pathways can appear. Accordingly, a multitude of capsules have been devised over the l...