Recently, environmental noise has arisen from various sources, such as those from exhaust mufflers of combustion engines found in cars, trucks, or power generators, which produce significant noise during their operation. Controlling the radiated noise from these mufflers is a major factor in improving acoustic comfort and minimizing the impact on the surrounding communities. Numerous research has been presented for this reason by modification of the internal structure of the exhaust muffler. The main objective of this work is to reduce the noise level emitted from exhaust mufflers. This can be achieved by adjusting structure parameters to attenuate the surrounding environment's radiated noise. Analysis of pressure-wave propagation h

In this paper, we establish the conditions of the occurrence of the local bifurcations, such as saddle node, transcritical and pitchfork, of all equilibrium points of an eco-epidemiological model consisting of a prey-predator model with SI (susceptible-infected) epidemic diseases in prey population only and a refuge-stage structure in the predators. It is observed that there is a transcritical bifurcation near the axial and free predator equilibrium points, near disease-free equilibrium point is a saddle-node bifurcation and near positive (coexistence) equilibrium point is a saddle-node bifurcation, a transcritical bifurcation and a pitchfork bifurcation. Further investigations for Hopf bifurcation near coexistence equilibrium point

11-22 Description An apology may be defined as “the act of declaring one’s regret, remorse or sorrow for having insulted, failed, injured, harmed or wronged another (Internet Encyclopedia of Philosophy IEP). A definition quite interested in the function suggests that “an apology is a speech act addressed to B’s face–needs and intended to remedy an offence for which A. takes responsibility.”(Holmes, 1990: 159). Apologies are also" speech acts" that are hard to identify, define or categorize, a difficulty that arises directly out of the functions they perform (Lakoff, 2001: 201) and the forms they take. In function, they range from selfabasement for wrongdoing to the formal display of appropriate feeling. In form, they range from

In this study, geopolymer mortar was designed in various experimental combinations employing 1% micro steel fibers and was subjected to different temperatures, according to the prior works of other researchers. The geopolymer mortar was developed using a variety of sustainable material proportions (fly ash and slag) to examine the influence of fibers on its strength. The fly ash weight percentage was 50%, 60%, and 70% by slag weight to study its effect on the geopolymer mortar's properties. The optimal ratio produced the most significant results when mixed at a 50:50 ratio of fly ash and slag with 1% micro steel fibers at curing temperature 240oC for 4 hours through two days. The compressive strength of the geopolymer mortar increas

The influence of fear on the dynamics of harvested prey-predator model with intra-specific competition is suggested and studied, where the fear effect from the predation causes decreases of growth rate of prey.  We suppose that the predator attacks the prey under the Holling type IV functional response. he existence of the solution is investigated and the bounded-ness of the solution is studied too. In addition, the dynamical behavior of the system is established locally and globally. Furthermore, the persistence conditions are investigated. Finally, numerical analysis of the system is carried out.

This experiment was carried out in one of the fields (A) affiliated to the College of Agricultural Engineering Sciences / University of Baghdad, for the spring season 2021, On hybrid tomato plants (Mayai Mayai) to test flower viability, using two factors, the first was three levels of irrigation interval (2, 4, 6) days, and the second factor three concentrations of compound Nano fertilizer with concentrations (0, 1.5, 2.5) gm liter-1, so that the number of treatments is 9 treatments and three replications, the number of experimental units is 27 experimental units distributed randomly according to the random drawing method to ensure reducing experimental error and obtaining the most accurate results. A factorial experiment 3 x 3 x 3 was carr

(Thimma) in Arabic means compact, and immunity. (People of Thimma) are the free non-Muslim people under Muslim rule. This includes Heavenly Religions people, i. e., Christian and Jews).
They have been called (People of Thimma) because they had paid (Jizyah: tribute) so they became safe for their souls, honor, properties at the custody of Muslims.
Islamic law had posed (Jizyah: tribute) upon the Jews and Christians who were living under Muslim rule as a reaction of not embracing Islam Faith against securing their rights and freedom.
Freedoms secured by Islam for the (People of Thimma) had been many, including the right of faith, not coercing them to be Muslim, the right to live, to possess properties, protect and secure them, the

Writing his own biography is like making his confession in front of the altar of the truth. In The words,Sartre writes his own child life from the view of a philosopher-thinker. He presents his days spent justlike a series of images carrying advices and experiencesto whole the world. The words shows the life of a small orphan who met early with death when he lost his father. Then death becomes as his shadow that goes with him on day and night until the end. The mother of the little Poulou seems like the mirror that reflects the sadness and the melancholy of the dark and gloomy days. The small Poulou becomes his only consolation in misery. The little Jean -Paul lives completely in a literary atmosphere . Because his grandfather Karl Schwe

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      تقوم فكرة البحث الحالي على افتراض مفاده ان الكف المعرفي لدى الاطفال يزداد مع التقدم بالعمر عبر مرحلة الطفولة الوسطى ،  وتسهم هذه الزيادة في فاعلية التحسن التطوري في اداء الذاكرة .

      ولغرض تفحص هذه الفكرة تتبعت الباحثة تطور الكف المعرفي الفعال للاسترجاع بقمع أو كف مسارات الاسترجاع للمعلومات غير ذات الصلة بالموضوع اوالمهمة في ا

تعد الطفولة من المراحل المهمة في حياة الفرد باعتبارها الأساس الذي يبنى عليه شخصيته من خلال ما يتلقاه من رعاية وأعداد وتدريب في طفولته   ( الذويبي،1988, ص31) فعلى ضوء ما يتلقى الفرد من خبرات في مرحلة الطفولة يتحدد إطار شخصيته فإذا كانت الخبرات مواتية وسوية وسارة يشب رجلاً سوياً متكيفاً مع نفسه ومع المجتمع الذي يحيط به  وإن كانت خبرات مؤلمة مريرة ترك ذلك آثاراً في شخصيته . إن خبرات الطفولة تحفر جذورها عم