[1] The Problem of Underqualified Teachers in American Secondary Schools This article presents the results of a research project on the phenomenon of out-of-field teaching in American high schools–teachers teaching subjects for which they have little education or training. Over the past couple of years, the problem of out-of-field teaching […]
News Update on Mineral Supplement : May 21
[1] Vitamin/Mineral Supplement Use among Athletes: A Review of the Literature Vitamin/mineral supplements are often used by athletes as ergogenic aids to improve performance. This paper reviews studies of the prevalence, patterns, and explanations for vitamin/mineral supplement use among athletes. Fifty-one studies provided quantitative prevalence data on 10,274 male and […]
Latest News on Newton’s Law : May 21
[1] On the origin of gravity and the laws of Newton Starting from first principles and general assumptions we present a heuristic argument that shows that Newton’s law of gravitation naturally arises in a theory in which space emerges through a holographic scenario. Gravity is identified with an entropic force […]
News Update on Power Generator : May 21
[1] MEMS power generator with transverse mode thin film PZT A thin film lead zirconate titanate, Pb(Zr,Ti)O3 (PZT), MEMS power generating device is developed. It is designed to resonate at specific frequencies from an external vibrational energy source, thereby creating electrical energy via the piezoelectric effect. Our cantilever device is designed to have a flat structure with […]
Latest Research News on Spleen : May 21
[1] Structure and function of the spleen The spleen combines the innate and adaptive immune system in a uniquely organized way. The structure of the spleen enables it to remove older erythrocytes from the circulation and leads to the efficient removal of blood-borne microorganisms and cellular debris. This function, in […]
Latest Research on Tomato Seedling : May 21
[1] A humic acid improves growth of tomato seedling in solution culture The effects of humic acid (HA) on nutrient accumulation and growth of tomato seedlings were evaluated in a solution of limited nutrient availability in a greenhouse. HA additions were made to the nutrient solution at rates of 0, […]
Latest News on Aloe Vera : May 21
[1] Aloe vera We review the scientific literature regarding the aloe vera plant and its products. Aloe vera is known to contain several pharmacologically active ingredients, including a carboxypeptidase that inactivates bradykinin in vitro, salicylates, and a substance(s) that inhibits thromboxane formation in vivo. Scientific studies exist that support an […]
News Update on Medicinal Plant : May 21
[1] A review of the antioxidant potential of medicinal plant species Some researchers suggest that two-thirds of the world’s plant species have medicinal value; in particular, many medicinal plants have great antioxidant potential. Antioxidants reduce the oxidative stress in cells and are therefore useful in the treatment of many human diseases, including cancer, cardiovascular […]
News Update on Resources and Manufacturing Engineering: May 21
[1] Advanced manufacturing engineering In this paper reported are some of the activities of the Laboratory of Manufacturing Technology of the NTUA in manufacturing engineering, focusing onto some recent trends and developments in advanced manufacturing of advanced materials, mainly emphasizing my long-standing Greek–Ukrainian–Russian–Hungarian scientific cooperation, also with international involvement worldwide, […]
Latest News on Water Quality : April 21
[1] Water quality Water chemistry and water quality are examined. Water quality parameters discussed include oxygen content, pH, nitrates, heavy metals, trace elements, hardness, odour and colour. Water quality standards from Europe and the USA, and their relation to human and aquatic health are examined. [2] DESIGN OF AN INDEX OF WATER […]