A real method of predication brake pad wear ,could lead to substantiol economies of time and money. This paper describes how such a procedure has been used and gives the results to establish is reliability by comparing the predicted wear with that which actually occurs in an existing service. The experimental work was carried out on three different commercial samples ,tested under different operation conditions (speed,load,time...etc)using a test ring especially modified for this purpose. Abrasive wear is mainly studied , since it is the type of wear that takes place in such arrangements. Samples wear tested in presences of sand or mud between the mating surfaces under different operational conditions of speed, load and braking time .Mechanical properties of the pad material samples (hardness, young,s modulus and collapse load under pure bending condition )wear established . The thermal conductivity and surface roughness of the pad material wear also found in order to enable comparison between the surface condition before and after testing. Sliding velocity had a small effect on the wear rate but it had great effect on friction coefficient. Wear rate was affected mainly by the surface temperature which causing a reduction friction coefficient and increasing the wear rate. Surface roughness had almost no effect on the wear rate since it was proved experimentally ,that the surface becomes softer during operation .mechanical properties of the pad material had fluctuating effect on wear rate. The existence of solid particles between pad and disc increasing wear rate and friction coefficient while the mud caused a reduction in wear rate of the pad surface since it acts as a lubricant absorbing the surface heat generated during sliding the area of contact between pad and disc. wear rate obtained experimentally agreed fairly well that found from empirically obtained equations.
The concept of poetics has different dimensions, part of which is related to the creative achievement, and part is related to the critical perspective.
The oil sector in Iraq suffered from several difficulties led to the decline and reduction of oil production and the deterioration of refineries and transport pipeline status in addition to the weakness of the technology side and the prevalence of financial and administrative corruption besides the high costs of rehabilitation of the oil sector and also administrative and institutional problems still ongoing.
In spite of Iraq's possession of vast oil wealth allows him to play an important role in the international energy market، he is still under the level. The production of oil doesn'<
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The Arab woman expressed the life of oppression that she suffers from in her masculine environment, as she expressed her linguistic abilities with eloquence and intelligence, as she did not neglect philosophy, wisdom, and exhortation
The term of ability (Al qoudra) is of the common terms which used by speech scientists to relate to one of the important verbal issues which called “Fate and destiny”. the issues of fate and destiny has been raised by Muslims since the dawn of Islam and It was researched among speech scientists, there are many opinions about this issues as the man can do or leave anything or he forced to do something that mean he hasn’t ability.
Also the term was used by jurists and they mention to the ability conditions (Assigning the Divine) and when this conditions are not available that means the man is not commissioning, the conditions are Mind, puberty and other conditions which mentioned in the books of jurisp
... Show MoreThe povety in a subjct of one of the most important problems that
accompanied the development process in iraq and is now pointing in the
depth of institutional struetues and threaten the sociol fabric and cohesion
mechamisms .
The study included of the most importana social problems that
accompamied thecrises and occupation in iraq as aproblem of unemployment
aworce, forced displacement and disintegration of family and juvenile
delinguency and the problems of drug addiction .
The study relied on sample slected from the city of Baghdad ,showed
the most important results of that two-thirds of the asssets of an urban sample
compared to one third of them from rural aelcyrounds and that there is
arelationship
لم تعد اللغة مجرد أداة للتعبير عما يفكر به المتكلمون، إذ تعدت ذلك إلى أن تكون سبيلاً في صناعة العالم على وفق مقاربة تداولية، وقف عليها علماء البحث اللساني من أمثال أوستن و هرسل، للكشف عما وراء اللغة، وما يقصده المتكلمون، والبحث عن أفعال الكلام التي يسعى المتحدثون الى استعمالها، ولذلك اتجهت هذه الدراسة للوقوف على شعر عصر صدر الإسلام، واجراء دراسة تداولية لاستكشاف الأفعال التي كثيرا ما استعملها شعراء الإسلام
... Show MoreThis research attempts to study Monetary system status and financing in the CIB through 4 sections, starting with the methodology and ending with conclusions and recommendations.
These two topics of Monetary and financing, that falls within the mandate of the CBI, are researched / studied relying on the resources and relevant literature. This research is a simple contribution, but meantime it is an honest attempt to elevate the effective role of the CBI which is considered one of the most pioneering central banks in the region.
Violence can be identified as an outreaching on others’ dignity,
freedom, properties, and life. Therefore, violent actions cannot be determined
only on materialistic attacks such as killing, beating, robbery, rape, and civil
wars, but it also includes the verbal attacks such as insult, threat, and cursing.
Violence against women can be identified as any bad actions that are
done against women, which lead to a physical or psychological harm, and
invade their safety and freedom whether these actions come from men or
women, against one woman or a group of women in special and general
places.
Before, the social, historical and lawful manners concentrated on
sexual distinction between the men and a woman, which