وضع (woodruff and siddoway, 1965) معادلة لتقدير مفقودات التربة بواسطة التعرية الريحية تدعى (معادلة التعرية الريحية (WEQ، إذ يعطي حل هذه المعادلة الكمية القصوى للتعرية الريحية تحت ظروف حقلية معينة، وتعتبر دليل في تحديد الأساليب الضرورية لمعالجة التعرية الريحية في تلك الظروف (الطيف وآخرون، 1991). تهدف هذه الدراسة إلى معرفة مدى تأثير التغيرات المناخية في منطقة السماوة جنوب العراق وبغداد وسط العراق طوال فترة 34 سنة في قيم مفقودات التربة بالتعرية الريحية باستعمال معادلة ( woodruff and siddoway, 1965 ) ومدى فعالية التغيير في عامل خشونة سطح التربة في خفض أو زيادة هذه المفقودات. تم اختيار موقعين تقع ضمن مناطق وسط وجنوب العراق, الأول في منطقة الجادرية في محافظة بغداد والثاني في منطقة السماوة في محافظة المثنى. أظهرت النتائج أن مفقودات التربة المقدرة للسنوات (1980- 2013) في الجادرية تنخفض سنوياً بمقدار 0.1 – 0.3 ميكاغرام. هكتار-1.سنة-1, بينما تزداد في السماوة بمقدار 0.24 – 0.76 ميكاغرام.هكتار-1.سنة-1. وكان تأثير معامل الخشونة معنوياً في خفض مفقودات التربة في فترة الدراسة. فقد خفض معامل الخشونة للترب المتنية (0.5) مفقودات التربة بنسبة 2.6 مرة مقارنة بالتربة غير المتنية (1) بينما كانت النسبة في التربة شبه المتنية (0.75) 65 % . ويرجع ذلك الى تأثير المتن في خفض سرعة الرياح والحد من قدرتها على التعرية. ان الاتجاه العام لمفقودات التربة يشير الى الانخفاض في منطقة بغداد والارتفاع في منطقة السماوة مع وجود حالة التذبذب في مفقودات التربة ما بين ارتفاع وانخفاض عن خط الاتجاه العام بسبب عامل المناخ (C) في المعادلة العامة لمفقودات التربة وهو يعكس قدرة الريح على التعرية، إذ يكون منخفظاً عند تحسن الظروف الرطبة من زيادة معدل الامطار وانخفاض التبخر ومرتفعاً عند سيادة ظروف الجفاف.
Traditionally, women playwrights in general, and black women playwrights in particular have been excluded from the American theater because of racial and gender oppression. However, early twentieth-century African-American women playwrights, such as Angelina Weld Grimke (1880-1958), Alice Dunbar-Nelson (1875-1935), Marry Burrill (1879-1946), and Myrtle Smith Livingston (1901-1973), whose works have been overshadowed for decades, were able to express their awareness of the racial discrimination facing African-Americans. They also paved the way for the next generation of black women playwrights, such as Alice Childress (1920-1994), Lorraine Hansberry (1930-1965) and many others.
... Show MoreNative speakers of English from different parts of the world have different accents,but the differences of accents are mainly the result of differences in the sound of vowels and consonants . The actual use of all these sounds in combination leads the speaker to produce a number of segments which only appear on the production level and realized on the perceptual one . RP pronunciation represents the teachable variety in all Iraqi universities because it is the most acceptable and understandable accent all over the world and not only in South East London ..The structure of the English syllable in RP pronunciation is influenced by the appearance of certain allophones especially aspiration and glottalization which ch
... Show MoreThe paper deals with the contemporary American playwright, Kenneth Bernard,
and his Theatre of the Ridiculous. This theatre, which originated in the 1960s and
1970s, aims at undermining dramatic and social conventions, and political,
psychological, sexual, and cultural categories. It makes use of mass culture
entertainment in America (television, popular songs, old movies, the circus) in its
attempt to make us recognize the world as “ridiculous,” a world which is both
brutal and farcically trivial and insignificant, a world of ruthless powers, of freaks,
clowns, and victims, of hysteria and absence of truth, a world, as Bernard describes it,
“without hope, mercy, history, or any saving sociology or ideology.
In "historical" fiction, characters that never really existed, give expression to the impact of historical events on the people who really did live through them. The result is not history, as an accurate record of actual events, but fiction in which an earlier age is rendered through the personal joys and sufferings of characters. This paper
aims at investigating the historical realities presented in Dickens’s A Tale of Two Cities.
Alice Walker's novel The Color Purple1983, whose events take place in the rural Georgia and addresses the most important issues in the early 20thcentury; like male dominant society and women submission to men, weaves a mosaic picture of male-female relationships. Black men like Alphonso, Albert and Harpo are portrayed as oppressors, cruel and they exercise power and violence over their wives and daughters. Through the negative portrayal of black male characters, Walker is accused to be a men hating writer because she ''Views oppression as an essentially masculine activity which springs from the male's aggressive need to dominate. In the novel, man is the premium mobile, the one by whom and t
... Show MoreAbstract
Social media has thrived recently and public organizations at Thi-Qar governorate across different levels are experimenting with launching government social media (GSM) to facilitating two-way interactions between the government and its citizens. Both scholars and practitioners are focusing on understanding the key success factors related to the create of GSM. This study aimed to identify the key success factors by exploring the formation mechanism of individuals’ continuous usage intention. Through the theoretical perspective of the uses and gratifications theory. We identify the gratification factors that stimulate users’ continuance intention toward GSM. Furthermore, we draw upon the stimulus–organism–
... Show MoreThe latest open commercial markets among countries, shift of capitals, and rise of mass economic, large international organizations, and international contracts leaded to a great increase of competition among countries for attracting capital for investments, specially among under developing countries which had bad economic situation, and which thinks that investment is the best solution to solve their old economic problems.
Developing small, and medium establishments in all economic sectors became the main economic force and natural resources for the development and growth of under developing countries. Small and medium establishments became the majority of any country establishments, and the past international experience shows t
... Show MoreIt is not often easy to identify a certain group of words as a lexical bundle, since the same set of words can be, in different situations, recognized as idiom, a collocation, a lexical phrase or a lexical bundle. That is, there are many cases where the overlap among the four types is plausible. Thus, it is important to extract the most identifiable and distinguishable characteristics with which a certain group of words, under certain conditions, can be recognized as a lexical bundle, and this is the task of this paper.
This research deals with parameters estimation methods for the intensity function of non homogeneous poisson processes , it aims to estimate parameters of this function throughout three methods which are maximum likelihood method , moment method and shurnkage method using simulation method.
In order to achive the best method, several assumed values for parameters of intensity function have been adopted using sample size of
(14, 25, 50, 100) .Results of estimation showed that the estimation over the estimation method , of maximum likelihood and moment .
This estimation gain the least mean of squares error for the above samples .
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... Show MoreArtificial intelligence is what helps in the transition to digitization or digital transformation, which is intended to represent files, images, and objects with separate points, which means the transformation from the traditional system that contains traditional drawbacks to the electronic system, and this transformation requires knowledge of the methods and means that suit this transformation, so the transformation to Digitization has now become a necessary matter for solving all contemporary problems. Most importantly, it is eliminating complex procedures and government red tape by turning to electronic governments, and eliminating everything that is complex, accumulated, and difficult to retrieve. This is what we will address in the sub
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