The final hot strip profile is a superposition of the roll initial CROWN, the roll bending and flattening CROWN, the roll WEARING CROWN and the roll thermal CROWN. In this research, linear regression models are proposed to predict the roll force, the roll WEARING CROWN and the roll thermal CROWN using experimental data provided by Mobarake Steel Complex (MSC). The Euler-Bernoulli beam theory based on elasticity approach is also used to predict the roll bending and flattening CROWN. Finally, the work roll initial CROWN in order to obtain desired strip profile in hot rolling is predicted utilizing a computer programming. The obtained initial CROWNs are then used for seven stands of an actual roll schedule for hot strip mill of MSC. The measured strip profile shows a good agreement with the desired one for the mentioned mill.

Liens tolerate environmental stresses utilizing is one of the applicable technologies in sustainable agriculture. Since occurrence of a suitable winter for studing and selection of cold/frost resistance on breeding materials is one year out of ten, therefore laboratory methods complementing field data provide a reasonable solution for this propose. This research was conducted in Khorasan Agri. Res. Center. Mashhad. Using RCBD in three replications during 1380-81. Treatments consisted of twenty promising genotypes of uniform regional yield trail (cold area). Genotypes suits low temperature regions will be introduced based on generated results from this investigation. Using CROWN freezing method, experimental genotypes were treated with -20. C temperature under controlled conditions. Survival percentage was computed. Results indicated that genotypes No.9 (C-78-9) and No.7 (C-78-7) had highest (98.33%) and lowest (66.67%) survival percentage respectively. The minimum CROWN Moisture Content was detected in line No. 9 (C-78-9) and there was no significant difference for the same trait between genotype No.7(C-78-7) and other superior genotypes. A high negative correlation (r=-0.701) was observed between survival percentage after exposing to frost and CROWN moisture content. Ear primordia development stage was one of the characters which had also a significant correlation with survival percentage (r=-0.619). Significant correlation between survival percentage and days to heading (r=-0.207) and days to physiological maturity (r =-0.028) was not observed. Correlation between survival percentage and collected cold damage data from experimental fields over five low temperature regional stations was highly significant (r=0.416), therefore it may be concluded that CROWN Freezing Method and subsequent computing of survival percentage is a reliable method for estimating wheat frost/cold tolerance in natural conditions.

Literature as a cultural mirror of every nation is the most reliable source that reflects customs, rituals, and beliefs of people intentionally. Undoubtedly, literature of our nation is among richest and brightest literatures as the human precious wealth. In addition of its unique historic features, Bihaghi History Book is one of the most precious literature sources. The source that as more we contemplate we do fascinate more and also we discovered its historical, cultural and…values. One of the cases that take attention of this pernicious heritage reader is precise mentioning and delicate attention of events, incidents and rituals and… of Masoud Ghaznavi government because of sharp attendance of Abolfazl Beihaghi at the central affairs of Masoud Court. Description of Mahmood Ghaznavi death and empowerment of Masoud is one of the main parts of this book. It is in this part that Beihaghi in describing Mahmood mourning rituals, despite that period costumes and rituals and even previous eras(according to its contemporary literature) by explaining white WEARING of Masoud and his followers in Mahmood and Khalifa empowered by god mourning rituals. The costume that was completely oppose of other mourning descriptions in various Persian literatures up to writer s period. As if mourning and its specific features are one of the most significant characteristic of every nation customs and rituals, studying its causes and finding roots and origins of these differences is one of the main purposes of this research.

The most important application of polytetrafluoroethylene (PTFE) polymer in industry is its use as a solid lubricant, due to its lack of reactivity with most industrial materials. However, the PTFE polymer has low abrasive resistance that limited its usage. In this research, 0, 2, and 5% of nanoclay were added to PTFE polymer as filler, and properties of the resultant nanocomposites were investigated. For this purpose, the nanoclay was first dissolved in a solution of water and surfactant, and then added into the PTFE. After thoroughly mixing, the cylindrical specimens were produced by cold pressing and heated to 340 °, C for 2 h in an atmosphere-protected furnace. EDS analysis, electron scanning microscopy and pin-on-disk wear test were done on nanocomposites. The results of the EDS proved the uniform distribution of nanoclay in the matrix of PTFE. The abrasion test showed that the wear resistance was more than 100 times in the nanocomposite containing 5% nanoclay than PTFE. The investigation of the abrasive particles showed that the particles separated from polymer are longer and thicker than those separated from nanocomposite. By observing the surface of the abrasive pin after the wear test, it became clear that the transfer film from the PTFE polymer was formed on the surface of the abrasive pin and prevented the nanocomposite from the abrasion directly. Therefore, the abrasion mechanism in nanocomposites is “, abrasive”,due to the surface adhesion.

Background. Periodontal surgery has a major role in aesthetic dentistry. Main indications for aesthetic CROWN lengthening of anterior teeth are excessive gingival exposure or “ gummy smile” appearance, to expose the anatomic CROWN of teeth, reduce asymmetry between contralateral teeth, and reduce gingival exposure. The preservation of biologic width space following aesthetic procedures demands the existence of clearly defined therapeutic objectives Methods. Indications for surgery and different surgical techniques will be explained as well identifying the problem Results. Different indications are illustrated with cases to show the surgical treatment approach to improve the esthetic appearance for each condition. Conclusions. Aesthetic CROWN Lengthening is a predictable surgery.

Background. Dental esthetic has become a popular topic among all disciplines in dentistry. There is a notable relationship between a person’ s attractiveness and amount of gingival show. Excessive gingival display and discrepant gingival margins has a negative impact on a pleasant smile and also on one’ s self-confidence. Esthetic CROWN lengthening is used to alter the gingival labial profile. This procedure is indicated to reduce gingival exposure or asymmetry between contralateral teeth. It is important to consider parameters of ideal gingival labial positions. Esthetic analysis that is included, facial, dental and dentogingival, should be done before beginning of treatment. The aim of this study is to review the related studies and gather information on esthetic parameters of ideal gingival labial positions and classification of CROWN-lengthening procedures. Methods. This study is based on articles found in PubMed database, published in 2014 and later. The keywords for this research were esthetic CROWN lengthening, gummy smile, gingivectomy, and periodontal surgery. Results. In order to perform a successful treatment, having the knowledge on classification and treatment sequence of CROWN-lengthening procedures with their indication and contraindications, is critical. Esthetic CROWN lengthening classification: I. Gingival reduction only without osseous resection II. Gingival reduction with osseous resection Both of these techniques can be performed by gingivectomy or apically positioned flap. This decision is made on the basis of amount of keratinized gingiva. Gingival reduction only is rarely used because bone reduction is usually needed to achieve ideal treatment. Conclusions. Dentists should be aware patients of benefits of cosmetic dental rehabilitation. The evaluation of each case is the most important step to achieve proper treatment plan and choose correct technique for CROWN Lengthening. Therefore, the patient esthetic demand will be perceived in the best way.

Perception of body is different in various cultures and it is one of the prominent concerns of sociologists of sociologists of the world today. In this field different insights to the body of men and women is well-known. In some societies body is considered as a private object and will prevented to be shown in public. In some others it is cherish and the owner can use it in any way. In Iranian long history the body considers as a private object and avoids to be publicized. This rule is restrictors for women. In this article a short history of women's WEARING is presented and women students' tendency to different WEARING is analyzed. Women students' WEARING in different social occasions is reported and social condition's affect on their clothing is examined. The article will deal with social changes in a period of ten years and its effect on women students' tendency to different types of costume.