This work suggests a system of ordinary differential equations (ODEs) containing a three-species food chain model incorporating wind and fear effects. The properties of the solution, like positivity and bound-ness, were investigated. All equilibrium points (biologically feasible) have been obtained, and the local stability of these equilibriums has been carried out. The global stability outcomes on the equilibrium points under specific restrictions have been established. Also, the persistence restrictions have been investigated. By utilizing Sotomayor’s theorem, the local bifurcation of the suggested model has been inspected. Furthermore, numerical analysis was carried out to ensure the theoretical results obtained by utilizing MA

The arise of Islam as a multidimensional changing phenomenon with its own revolutionary and comprehensive character was inherent with a lot of alterations in social aspects , and this is explicit particularly in the scope of urban life and town planning . Essentially, Islamic style of life has its own urban identity. The urbanization process in Islam has been developed across two integrated sides, the first one concerned on ideational and theoretical aspects , while the other associated with practice .Many urban centers emerged during the Islamic era since the erection of Basrah , the first Islamic town in the middle of the 7th. centaury. Some contemporary urban concepts , both environmental and social could be noticed in Islamic

The analysis of the classic principal components are sensitive to the outliers where they are calculated from the characteristic values and characteristic vectors of correlation matrix or variance Non-Robust, which yields an incorrect results in the case of these data contains the outliers values. In order to treat this problem, we resort to use the robust methods where there are many robust methods Will be touched to some of them.

   The robust measurement estimators include the measurement of direct robust estimators for characteristic values by using characteristic vectors without relying on robust estimators for the   variance and covariance matrices. Also the analysis of the princ

As the process of  estimate for model and variable selection significant is a crucial process in the semi-parametric modeling At the beginning of the modeling process often At there are many explanatory variables to Avoid the loss of any explanatory elements may be important as a result , the selection of significant variables become necessary , so the process of variable selection is not intended to simplifying  model complexity explanation , and also predicting. In this research was to use some of the semi-parametric methods (LASSO-MAVE , MAVE and The proposal method (Adaptive LASSO-MAVE) for variable selection and estimate semi-parametric single index model (SSIM) at the same time .

This research include the designation of newly instrument (Turbidmeter) depending on using photo voltaic detector (8.5mm.*8.5mm.).These dimensions have large area which increases the scattering rays with a variable intensity. The properties of this design are local mode and the used tools are a available in the local markets as well as its less cost light weight system. It is worth mentioning that the possibility of its application in many fields such as: Clinical, Laboratory, Industrial and Fuel fields. This designation, applied to estimate Barium Sulphate in turbidity method. The analytical results show high accuracy and repetition, also the linearity ranges from (4-180) ppm. At the detection limit (0.05) ppm. With correlation coefficient

This study investigates the influence of fear, refuge, and migration in a predator–prey model, where the interactions between the species follow an asymmetric function response. In contrast to some other findings, we propose that prey develop an anti-predator response in response to a concentration of predators, which in turn increases the fear factor of the predators. The conditions under which all ecologically meaningful equilibrium points exist are discussed in detail. The local and global dynamics of the model are determined at all equilibrium points. The model admits several interesting results by changing the rate of fear of predators and predator aggregate sensitivity. Numerical simulations have been performed to verify our theoret

تعد ضغوط التعلم من المتغيرات المهمة في العملية التعليمية، وهي من أكثر المشكلات شيوعاً بين الطلبة في الجامعات والمراحل التعليمية الأخرى، وترتكز ضغوط التعلم على فكرة شعور الطلبة بالضغط أثناء الدراسة، وشعورهم بالتعب من الدراسة، ونفورهم وخوفهم وجمودهم عن إنجاز المهام الموكلة إليهم، وكلما طالت مدة التعرض لضغوط التعلم دون محاولة مواجهة أسبابها، كلما ظهرت تغيرات أكثر في الحالة النفسية والفسيولوجية للشخص. وقد جا

هدف البحث الحالي إلى عامل البخل المعرفي الذي يعد من العوامل التي تعطل الأفراد سعي الى الادراك المتمثل بالبيئة المادية والمعرفية والعالم المحيط بهم فهو يجعل الأفراد لا يرغبون في بذل المزيد من الجهد والوقت في التفكير والتحليل مما يؤدي الي معوقات في الإدراك، فالبخل المعرفي هو اعتماد الفرد الاختصارات العقلية والاستدلالات العقلية السريعة للحفاظ على الموارد العقلية عند التعامل مع المهام التي تتطلب في المقام الا

-مشكلة البحث وأهمية الحاجة اليه:-

يمكن القول أن التقدم والتخلف قضيتان جذورهما فكرية تتمحوران حول استخدام المنهجية العلمية وليست التكنولوجيا عملاً خلافاً او مستحيلاً على أي شعب اذا اتيح له تربية العقل المنهجي أنه العقل الذي تعلم كيف يفكر . فالتكنولوجية : هي العملية الابداعية لمثل هذا العقل المنهجي وليس هذا العقل وليد المصادفة بل إن التربية أهم عوامل بنائه. فإذا ما أفادت التربية من هذه الحقيق