In this paper the design and development of a device (sensors system) to
study the effect of operational flaws of dowel Albetona engraved:
In order to find the appropriate resistance R factors for the to concrete
bored pile executive defects, whic
h include 15% or less than the cross section of
the to concrete bored pile by conducting tests on miniature models of the pegs
under the influence of horizontal and vertical loads.
The study aimed to Compare the effect of combination Platelet Rich
Plasma with bovine derived xenograft and bovine derived xenograft
alone in treatment of human class II furcation defects in mandibular
molars. Twenty systemically healthy patients,
aged 32 to 58 years with
chronic periodontitis participated in the study . Each patient had 2 buccal
mandibular class II furcation defects (first or second molars) were
randomizely treated either with : bovine – derived xenograft with
Platelet – Rich plasma, or with bovine - derived xenograft alone.
If it is not cracked then it is not working. This statement is the actual result of difference
between tension strength of concrete and tension strength of steel in concrete structures
elements that are economically designed.
In spite of that, eng
ineers rarely use this statement to explain cracks in buildings, but
sometimes they use it to calm down the owner of some cracked building. That's why we should
define acceptable cracks and their degrees.
Cracks in concrete and reinforced concrete structures are a bad sign, although some of
these cracks have no negative effect on the utilization of the structure.
Reasons of cracks are various and different, some of them might occur in different types
of cracking while others may lead to a single type of crack.
Cracks formation in concrete varies due to the different factors causing them, which also
may be structural or related to the utilization of building.
It is not easy to put a useful list for probable reasons of cracking as cracks have many
shapes and any one of them might increase the danger of another one or even exceeds it. To
explain the relationship between these types, we proposed the cracking tree, which may help
the designer to take into consideration the probable reasons for cracking.
The main specification of cracks is that its three nodes define the three periods in the life
of a structure: design, construction and service. These are also divided into lists including
reasons causing cracking and their effects on each other.
Cracking tree branches into tension roots, taking into consideration that the first branches
determine the physical properties of cracks (width, depth, length,…). Then these branches
take their way throughout the three phases,(restriction of movement is the most important
branch). When these branches stop growing, they can tell the severity of cracking, in respect
to durability and beauty. This definitely still needs accurate study and repair.
This research aims to study the direct reasons of cracking, factors that increase cracks,
and types of cracking growing in structural members (Columns, Beams, Plates,..). Add to that
the procedures needed to prevent or stop cracks growing. We also offer an attempt to point the
best methods and materials to be used for restoration.
This paper deals with the poetic necessity of Qudamah Ben
Jaafar, he begins by explaining the term necessary, and then he displays the emergence of Arabic grammar and its motives; he also refers to the Arabic criticism which was subjective without
depending on standards, until the beginning of blogging era and
development of science; it has being influenced by other cultures,
particularly Greek philosophy. The most affected person, put
foundations and controls for criticism he was Qudamah Ben Jaafar, who wrote a book called (criticism of poetry) which pointed to the failure of his predecessors who launched judgments on the poetry and limited their attention to the rhyme, strange and meanings, and neglected the difference between good and bad poetry, he put limits to the poetry, and clarified its pillars, and explained the reasons of the good and bad quality of poetry, and judged defects on the poems in which their content are disturbed (pronunciation, weight, rhyme, meaning), and these defects included damages and so on.
The aim of this research is to to identify the availability requirements of the
application of Six Sigma methodology in the companies studied, by identifying the degree
of realization of the importance of employees applying six sigma methodology, a
nd to
identify the suitability of the organizational culture prevailing in the companies studied to
apply the methodology six sigma, and to identify the availability of the necessary skills to
apply six sigma methodology.
The results of this research indicated the low degree of employees’ awareness to the
importance of applying six sigma methodology, and the lack of appropriate organizational
culture currently prevailing in the companies to organizational culture required for the
application of six sigma methodology, and to non-availability of sufficient skills to apply
six sigma methodology.
The most important recommendations of this research reveals the need for the
studied companies to conduct awareness campaigns to raise the employees awareness of
the importance to apply the six sigma methodology, and the need to encourage employees
to work together, and the necessary to orientation of the needs of customers , and follow
the initiative strategy, and train employees on the choice of projects to improve the quality,
and training the employees on the use of statistical tools and management and planning
tools to improve quality.
The present work, aims to inspect by ultrasonic method numbers of imported steel
billets, which cause stopping and breaking in the production – lines.
The inspection was done by using ultrasonic detector,(echo – pulse method), a
straight – beam pr
obe was used as a transducer and receiver, at the same time.
The results of inspection showed the possibility of accurate defect determination in
steel billets, and also showed a good agreement between the experimental results and the
number of stopping and breaking in production in factory, and also the necessity to use that
inspection method in the imported billets which cause the continuous breaking in the
production – lines.
