ان تصنيع رمال مطلية بأوكسيد الحديد من خلال ترسيب الجزيئات النانوية لذلك الاوكسيد على سطوح الرمال واستخدامها في الحاجز التفاعلي النفاذ لإزالة ايونات الكادميوم والنحاس من المياه الجوفية الملوثة الهدف الرئيسي للدراسة الحالية. تم توصيف بيانات الامتزاز نتيجة تفاعل المادة المازة مع المادة الممتزة قيد الدراسة بشكل جيد من خلال نموذج لانكمير والذي كان أفضل من نموذج فراندلش. لقد وجد ان اعلى قيم لقابلية الامتزاز باستخدام الرمال المطلية بأوكسيد الحديد وصلت الى 1.9181 و7.6425 ملغم/غم لكل من الكادميوم والنحاس على التوالي. اثبت برنامج COMSOL Multiphysics 3.5a قدرته على محاكاة والتنبؤ بانتقال الكادميوم والنحاس من خلال حاجز تفاعلي نفاذ ذو البعد الواحد والمكون من رمال مطلية بأوكسيد الحديد. أثبتت النتائج ان المادة المصنعة المستخدمة ضمن هذا الحاجز لها القدرة على تأخير انتقال الملوثات. لوحظ ان جذر معدل مجموع الأخطاء بين النتائج المتوقعة والمقاسة لا يتجاوز 0.121 وهذا يعني وجود توافق جيد بين تلك البيانات.
يدور هذا البحث حول جمع الالفاظ التي تتعلق بعناصر الطبيعة السماويّة وظواهرها في ديوان محمد مصطفى الماحيّ, وترتيبها في حقول دَلاليّة على وفق دراسة معجمية, تناولت فيها الالفاظ التي تتعلّق بعناصر الطبيعة السماويّة وظواهرها, فكان الهدف من هذه الدراسة هو دراسة الألفاظ التي ترتبط دَلالتها بمفهوم عام يجمعها حقل دلاليّ واحد كجمع الفاظ (السماء،والقمر، والبدر، والنجم، والكوكب), تحت مفهوم (عناصر السماوية وظواهرها الطب
... Show MoreIn this paper, the generalized inverted exponential distribution is considered as one of the most important distributions in studying failure times. A shape and scale parameters of the distribution have been estimated after removing the fuzziness that characterizes its data because they are triangular fuzzy numbers. To convert the fuzzy data to crisp data the researcher has used the centroid method. Hence the studied distribution has two parameters which show a difficulty in separating and estimating them directly of the MLE method. The Newton-Raphson method has been used.
... Show MoreThe research aims to study the elements of attraction in television advertising and determine their relationship to consumer preferences, the extent to which the sample (250) watches television advertisements, and the motives for viewing. Males and females, and the statistical program spss was used to analyze the results using percentages, arithmetic mean, correlation coefficients ch2, Pearson’s coefficient and Alpha Cronbach for the stability of the test, and the research came to the conclusion that the percentage of watching television advertisements is good motivated by the identification of new goods and services in the market, as advertisements sometimes achieve consumer preferences, and the most prominent The forms that a
... Show MoreThe use of ultraviolet rays is one of the methods of treating surface contamination of many foods especially pickles. however, there are some side effects to its use, especially in high percentage oil food products, it is necessary to determine the appropriate doses and time periods to avoid deterioration of its oil physicochemical characteristics. this study was conducted to see the effect of ultraviolet rays 15W on some chemical properties of olive oil when using it to preserve green olive pickles, treated for 5, 10 and 15 min daily. green olive fruits Iraqi variety (al-ashrasi), in season (2020-2021) were pickled using Spanish style, the best time period to pr
... Show MoreThe research aims to analyze the relationships of influence and influence between the soft skills of human resources and strategic performance, as the soft skills of human resources constitute the engine for all duties and operations carried out by the organization, and as a result of sharp changes in the environment, it was necessary for this organization to determine the most important financial and non-financial indicators that are required Approving it in achieving strategic performance to ensure its survival and continuity in work. The research problem was represented by a decrease in cognitive awareness of the importance of employing soft skills for human resources in achieving the indicators of strategic financial and non-
... Show MoreIn this work, the effect of the addition of bright nickel plating and silver carried out by the electroplating method has been studied, on the coating of copper nanoparticles on the copper base metal via the process of thermal evaporation. The improvement of the solar absorber using CuNP in combination with the bright nickel and silver was obtained to be better than copper nanoparticles individually. A bright nickel enhanced the absorbed thermal stability. Also, other optical properties, absorptions, and emissivity slightly decreased from (93% to 87%), while the existence of silver had a slight impact on absorption of about (86.50%). On the other hand, thermal conductivity was evaluated using hot disk analyzer. The results showed a good
... Show Moreيهدف هذا البحث إلى دراسة مسببات الصراع، والتي شملت (المصالح الشخصية، التمايز المهني والوظيفي، ضعف التنسيق والتعاون وسوء تحديد الواجبات ووصف العمل)، وأثرها في قرارات المستشفى التي شملت (مدى تحقيق الأهداف، خدمة المريض وإرضاءه، كفاءة استخدام الموارد المتاحة، ومكافأة العاملين وتحفيزهم).
لقد تم اختيار مستشفى بغداد التعليمي ومستشفى غازي الحريري التابعتين لدا
... 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 MoreA simple method was used to create a graphene oxide/chitosan (GO/CS) nanocomposite, which was then used in batch experiments to remove copper ions from industrial wastewater under various conditions of initial concentration, adsorbent weight, pH, and contact time. Maximum removal percentage equal to 99.4 % for initial copper ion concentration of 5x10-2 mol/L at pH 6, time 75 min, temperature 25 °C, and adsorbing dose 0.1 g. The pseudo-second order kinetic model and the Freundlich isotherm adequately fit the experimental results. The process was spontaneous and endothermic, according to thermodynamic studies.