Preferred Language
Articles
/
jeasiq-777
Comparison between the Local Polynomial Kernel and Penalized Spline to Estimating Varying Coefficient Model

Analysis the economic and financial phenomena and other requires to build the appropriate model, which represents the causal relations between factors. The operation building of the model depends on Imaging conditions and factors surrounding an in mathematical formula and the Researchers target to build that formula appropriately. Classical linear regression models are an important statistical tool, but used in a limited way, where is assumed that the relationship between the variables illustrations and response variables identifiable. To expand the representation of relationships between variables that represent the phenomenon under discussion we used Varying Coefficient Models (VCM) as it assumes the effects of variables illustrations be variable adoption of another explanatory variable. These structural avoided what is known as Curse of Dimensionality, which appears when we used nonparametric methods in estimation. We estimate the varying coefficients by using nonparametric methods which is the Local Polynomial Kernel (LPK) and Penalized Spline (PS), and by using simulation technique for comparison we found that the LPK method is the best.

 

Crossref
View Publication Preview PDF
Quick Preview PDF
Publication Date
Fri Sep 01 2023
Journal Name
Energy Reports
Effect of solvents on performance of Alq3/ZnO solar cells: A theoretical approach

Successfully, theoretical equations were established to study the effect of solvent polarities on the electron current density, fill factor and efficiencies of Tris (8-hydroxy) quinoline aluminum (Alq3)/ ZnO solar cells. Three different solvents studied in this theoretical works, namely 1-propanol, ethanol and acetonitrile. The quantum model of transition energy in donor–acceptor system was used to derive a current formula. After that, it has been used to calculate the fill factor and the efficiency of the solar cell. The calculations indicated that the efficiency of the solar cell is influenced by the polarity of solvents. The best performance was for the solar cell based on acetonitrile as a solvent with electron current density of (5.0

... Show More
View Publication Preview PDF
Scopus (2)
Scopus Clarivate Crossref
Publication Date
Sat Dec 15 2018
Journal Name
كلية التربية الاساسية
تقويم الكفاءة الادارية لأعضاء اللجان المشرفة على التطبيقات التدريسية في كليات التربية بجامعة بغداد من وجهة نظر التدريسيين المشرفين عليها

هدف البحث إلى معرفة تقويم الكفاءة الادارية لأعضاء اللجان المشرفة على التطبيقات التدريسية في كليات التربية بجامعة بغداد من وجهة نظر التدريسيين المشرفين عليها. اعتمد البحث المنهج الوصفي التحليلي. وتكون مجتمع البحث من (162) مشرفاً على التطبيقات التدريسية من كليات التربية/ جامعة بغداد، واختيرت عينة البحث بالطريقة العشوائية البسيطة، وبلغ عدد أفراد العينة (120) مشرفاً من الكليات آنفة الذكر. وتم بناء استبانة تضمنت (35)

... Show More
Publication Date
Tue Jan 08 2019
Journal Name
Arab Science Heritage Journal
الأمير كوركوز الاويغوري دراسة في سيرته ودوره السياسي والاداري والاقتصادي والعمراني خلال العصر العباسي 624-641 هـ/ 1226- 1243 م

حظيت عدد من الشخصيات التاريخية ممن كان لها أثر واضح المعالم في تطور النظام الإداري والسياسي للإمبراطورية المغولية، بأهتمام عدد لا بأس به من الباحثين.

View Publication Preview PDF
Publication Date
Wed Dec 12 2018
Journal Name
Arab Science Heritage Journal
الحركة مساهمة المرأة في الحركة العلمية من خلال كتاب (( أنباء الغمر بأبناء العمر )) لابن حجر العسقلاني (773هـ/852هـ) (دراسة تاريخية)

The search in these subjects makes an importanl accomplishment in the study of the scientific life in that (era)   specialy what the wonen had from a scientific and social level in that(age) the studies of the scientestis which were brilliant in the this era never hed the same as the first scientests . because of the common mistakes toward some resesrchers

View Publication Preview PDF
Publication Date
Sun Apr 02 2017
Journal Name
Journal Of Educational And Psychological Researches
أهم المشاكل الاجتماعية والنفسية المؤدية إلى الإصابة بمرض الزهايمر لدى كبار السن (دراسة ميدانية لعينة من المصابين في مدينة بغداد)

The most important social and psychological problems that lead to Alzheimer's disease in the elderly (field study of a sample of people living in the city of Baghdad). The research aims to: 1. Identify the most important social, psychological and health problems of elderly people with Alzheimer's disease. 2. The most prominent solutions and treatments for people living with this disease. 3. rehabilitation and provision of social, psychological and medical services for people with Alzheimer's disease. The research stages of Alzheimer's disease and its symptoms and the most important causes of Alzheimer's disease, research has strengthened the theoretical framework. The theoretical study unexplained social pressure generating dealt with Al

... Show More
View Publication Preview PDF
Publication Date
Mon Mar 01 2010
Journal Name
Journal Of Economics And Administrative Sciences
ادوار إدارة المعرفة التنظيمية و رأس مال الزبون العلاقة والأثر/ دراسة تطبيقية على القطاع المصرفي الأهلي في محافظة النجف الاشرف

يختبر البحث الحالي علاقة الأثر والارتباط بين إدارة المعرفة التنظيمية (المتمثلة قيادة المعرفة، تنظيم المعرفة، عمليات المعرفة، ثقافة المعرفة، تطبيق المعرفة، تقاسم المعرفة) ومتغير (رأس مال الزبون) في مجموعة من المصارف الأهلية في محافظة النجف إذ تمثلت مشكلة الدراسة بمدى دور إدارة المعرفة في هذه المصارف فضلاً عن الزبائن الذين يتعاملون معها، وقد استخدمت استمارة الاستبيان كأداة رئيسة لجمع البيانات إذ تم تو

... Show More
View Publication Preview PDF
Crossref
Publication Date
Sat Jun 06 2015
Journal Name
مجلة
فعالية استخدام تدريبات القوة الدافعة الذاتية في تطوير القوة الخاصة و بعض القدرات الوظيفية و المهارية للاعبين الشبابا بالكرة الطائرة

Publication Date
Mon Jan 01 2024
Journal Name
Baghdad Science Journal
Using Wild Plant Species Grown in Wadi Al – Tib Region North East of Al – Ammara, Iraq, as Indicators of Heavy Metals Accumulation

The current study included, studying the ability of eight genera of plants belong to Brassicaceae family, Brassica tournifortii, Cakile Arabica, Capsella bursa – pastoris,Carrichtera annua, Diplotaxis acris, Diplotaxis haru , Eruca sativa and Erucaria hispanica to accumulate ten heavy metals Cadmium, Chromium , Copper, Mercury, Manganese ,Nickel ,Lead ,and Zinc . Plant leaves samples were collected from Al-Tib area during spring of 2021.The data demonstrated that, the highest conc. of Cd was 2.7 mg/kg in Diplotaxis acris leaves and lower value was 0.3 mg/kg in Cakile Arabica leaves. For Co, the highest conc.was 1.3 mg/kg in Capsella bursa – pastoris leaves, whereas the lower value was 0.5 mg/kg in Cakile arabica leaves. As for Cr ele

... Show More
View Publication Preview PDF
Scopus (1)
Scopus Crossref
Publication Date
Mon Jun 01 2015
Journal Name
Journal Of Economics And Administrative Sciences
Impact of non-current assets impairment reporting on certain financial indicators application on Al-Mansour Pharmaceuticals- a private corporation

   This research deals with the financial reporting for non-current assets impairment from the viewpoint of international accounting standards, particularly IAS 36 "Impairment of non-current assets." The research problems focus on the presence of internal and external indicators on impairment of non-current assets in many of companies listed in Iraqi stock exchange. So it is required to apply IAS 36 to reporting for the impairment loss of assets since this impairment impact certain financial indicators. These indicators help users in their decision-making and forecasting future financial situation and the ability of the company to achieve future profits or maintain current profits. The research aims to shedding lig

... Show More
View Publication Preview PDF
Crossref
Publication Date
Thu Feb 04 2016
Journal Name
Iraqi Journal Of Market Research And Consumer Protection
Effect of Extracts Alkaloids Cordia myxa leafs on fourth larval stage in lesser grain borer Rhyzopertha dominica (F.)(Coleoptera:Bostrichidae): Effect of Extracts Alkaloids Cordia myxa leafs on fourth larval stage in lesser grain borer Rhyzopertha dominica (F.)(Coleoptera:Bostrichidae)

An experimental study was conducted to evaluate the effect of AL-coholic extract alkaloid of Cordia myxa leafs in fourth larval stage of lesser grain borer Rhyzopertha dominica. Using alkaline extracts of 8%, the study has been shown clear effect increased in mortality rate for fourth larval stage 93.3% and degressed to 66.6% at 4% concentrate to 13.3% with control treatment .Ahigher percentage of pupal mortality 16.6% at 4% concentrate has been observed, while no natural emergence carried out at concentrates of 4.6% comparing with control treatment of 86.66%, at the same time percentage of deformation has been increased to 16.66% at 4% of extracts and degressed to 6.66% at 6% while no deformation have been shown with control treatment .

... Show More
View Publication Preview PDF