In accordance with human necessities and deep attention into security, research studies have today became an irrefutable necessity in this area. It is noted that traditional concepts of this important issue have changed, as a result of occurring various events in the past, particularly in the 20th century; so that security is no more limited to protecting human beings against individual and col...

the main purpose of this study is to provide a historical perspective on intellectual development trends of educational administration during the 20th century. to achieve this goal, documentary method was used. a review of historical events shows that in the intellectual history of educational administration, extended efforts have been done to avoid confusion for creating knowledge base of educ...

Desert dust perturbs climate by directly and indirectly interacting with incoming solar and outgoing long wave radiation, thereby changing precipitation and temperature, in addition to modifying ocean and land biogeochemistry. While we know that desert dust is sensitive to perturbations in climate and human land use, previous studies have been unable to determine whether humans were increasing ...

A Look at Contemporary Persian Poetry, Currents in Persian Poetry in 20th Century This book is a historical survey of literature though the writer has tried to distance himself from ancient approaches and to apply a modern look of analysis, critique and stylistics. In the first chapter the methodology is discussed followed by the second chapter which talks of text and metatext and the relation...

the control problem and dynamic programming is a powerful tool in economics and management. we review the dynamic programming problem from its beginning up to its present stages. a problem which was involved in physics and mathematics in i 7” century led to a branch of mathematics called calculus of variation which was used in economic, and management at the end of the first quarter of the 20” ...

Needle aspiration of lymph nodes was used at the beginning of the 20th century to identify parasites in sleeping sickness, secondary syphilis, filariasis, and bubonic plague. In 1921, Guthrie at the Johns Hopkins Hospital described systematic diagnosis of lymph node aspirates using air dried films and Romanowsky staining. This began the modern development of this technique and I intend to summa...

[1] An understanding of climate history prior to industrialization is crucial to understanding the nature of the 20th century warming and to predicting the climate change in the near future. This study integrates the complementary information preserved in the global database of borehole temperatures [Huang et al., 2000], the 20th century meteorological record [Jones et al., 1999], and an annual...

Changes in sea level (relative to the moving crust) are associated with changes in ocean volume (mostly thermal expansion) and in ocean mass (melting and continental storage): zeta(t) = zeta(steric)(t) + zeta(eustatic)(t). Recent compilations of global ocean temperatures by Levitus and coworkers are in accord with coupled ocean/atmosphere modeling of greenhouse warming; they yield an increase i...