فهرست مطالب peiman valipour

The use of nano fibers has grown significantly in recent years. These fibers have many advantages over micro fibers, the most important of which is their specific surface area and greater strength. Electrospinning is a conventional process used to prepare fine and uniform polymer nanofibers. The use of this method is limited due to the need for a high potential difference, the need for an electrically conductive collector, and relatively low production speed. Centrifugal spinning technology uses centrifugal force instead of using high voltage to produce nanofiber polymer and is a safer and more affordable option than electrospinning. In this study, centrifugal and electric forces were used simultaneously to produce polyacrylonitrile nanofibers and the effectS of adding centrifugal force to electric forces on the diameter of nanofibers, production rate, percentage of surface porosity, and dye absorption of polyacrylonitrile nanofibers were compared for both methods. The results showed that the use of electrocentrifuge instead of electrospinning can reduce the diameter of nanofibers by 40% and increase the production rate by 68%. On the other hand, increasing the rotation speed in this method leads to a decrease in the diameter of nanofibers and an increase in the specific surface area. Morever, nanofibers produced by this method were 33% more successful than electrospun nanofibers in absorbing colored pollutants. Therefore, the use of these fibers as an effective absorbent for colored wastes is suggested.

This research was conducted with the aim of identifying and prioritizing the factors in the design of office uniforms for the employees of education departments in Mazandaran province with rug motifs. In order to determine the weight of specific qualitative coefficients, which is one of the most important parts of qualitative assessment, the Analytical Hierarchy Process (AHP) method was used in Expert Choice software. A researcher-made questionnaire and the opinions of 10 experts in this field were used to collect data. According to the subject and purpose, 3 main features and 9 sub-criteria are named 1. Imagery including simulation, abstractionism, symbolic style, visual motifs including shapes, concepts of shapes, shapes. and creating the illusion of movement including lines, rhythmic surface and color contrast were identified and selected. The findings of the research showed that the priority of the main criteria from the highest value to the lowest value includes imagery, visual motifs and creating the illusion of movement. Also, the sub-criteria of symbolic style, shape concept, shape symbol, abstraction, lines, simulation, color contrast, shape reference and rhythmic levels were also prioritized from the highest value to the lowest value. The results of this research can be used in the design of office uniforms for employees of companies and organizations with traditional motifs, especially rugs, etc.

the color has a special representation in customs and rituals. Clothing is the most obvious cultural symbol and the most important and specific aspect of ethnicity and tribe, which is quickly affected by acculturation phenomena among different societies. The wedding dress has also been one of the important characteristics and dominated by this cultural element. which has been conducted in a descriptive-analytical way. Field and library methods have been used to collect information to study the symbolic role of the color of the wedding ceremony dress of the girls of the Caspian region of Iran and how it is influenced by its ethnic-tribal identity. The results of the research indicate that the application of color in the marriage ritual of the Caspian regions of Iran has symbolic meanings in addition to aesthetic aspects and is related to the theme of the intended ritual. For example, the presence of the green color in the wedding dress of the northern regions of Iran is a symbol of the greenery and freshness of these regions and indicative of the fertility and greenness of the couple. White color is a symbol of honesty and purity and the beginning of life based on intimacy. which is often seen in the headscarves of the brides in these regions.The symbolic role of red in these rituals is love, life, and happiness. As a result of the flexibility, the green color and red power are good complements for any beginning, including the beginning of a marital life,

This research has been conducted with the objective of multi-functional finishing on cotton fabric forimproving different properties such as photocatalytic activity, electrical conductivity, UV blocking, andantibacterial. To this end, in situ synthesis of graphene/zinc stannate nanocomposite was carried outand its effect on the cotton properties was investigated. The structure and morphology of the fabricsurface has been examined by field emission scanning electron microscopy (FE-SEM) and its chemicalstructure has been elucidated by X-ray photoelectron spectroscopy (XPS). The electrical conductivityof coated fabrics was improved significantly due to the presence of graphene on the surface of cottonfabrics. The photocatalytic activity of the treated fabrics with graphene/zinc stannate nanocompositewas tested by degradation of methylene blue in aqueous solution under sunlight irradiation, whichdemonstrated excellent photocatalytic efficiency of the nanocomposite. The antibacterial activities of thesamples against two common pathogenic bacteria including Escherichia coli and Staphylococcus aureushave been also assessed, which suggested that the graphene/zinc stannate nanocomposite can functioneffectively as antibacterial agents. Moreover, the nanocomposite finished cotton fabric showed properUV blocking activity.

In this study, a mesoporous silica nanostructure was synthesized and magnetized (Magnetic-SBA-15) and then its ability to remove reactive red 198 dye (RR198) from aqueous solution was investigated. The structure of produced adsorbent were evaluated by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). the effect of effective parameters on the adsorption process such as pH, adsorbent dose, contact time, temperature and dye concentration were investigated and optimized. The optimum conditions for removal of reactive red 198 dye was pH =2, adsorbent dosage of 0. 4 g/l ,contact time of 60 minutes and temperature 25 ⁰C in 60 ppm of dye concentration. UV-vis spectrophotometer was used to determine the amount of residual dye in the solution. To determine the type of adsorption isotherm, the Langmuir, Freundlich and dubinin-radushkevich equations of adsorption isotherms were used. The results showed a good fit for the Langmuir adsorption isotherm (R2 = 0.997 and RL = 0.275). According to the values obtained from thermodynamic parameters such as enthalpy (-15.346 kJ/mol) and Gibbs free energy, the removal of reactive red 198 dye by Magnetic-SBA-15 was exothermic and spontaneous.

Using‌ different‌ resources‌ and‌ the‌ qualitative‌ method‌ of‌ content‌ analysis,‌‌‌‌ a‌ human‌ resource‌ management‌ model,‌‌‌‌ which‌ is‌ composed‌ of‌ ideal‌ goals‌ (perspective,‌‌‌‌ mission,‌‌‌‌ values,‌‌‌‌ and‌ strategic‌ orientation),‌‌‌‌ was‌ developed‌ for‌ the‌ petroleum‌ industry.‌‌‌‌ The‌ data‌ required‌ were‌ collected‌ from‌ various‌ sources,‌‌‌‌ including‌ upstream‌ documents,‌‌‌‌ business‌ strategy,‌‌‌‌ trends,‌‌‌‌ comparisons,‌‌‌‌ historical‌ documents,‌‌‌‌ and‌ semi-structured‌ interviews‌ with‌ 49‌ senior‌ managers‌ of‌ the‌ petroleum‌ industry.‌‌‌‌ The‌ results‌ include‌ perspective,‌‌‌‌ mission,‌‌‌‌ values,‌‌‌‌ and‌ strategic‌ orientation‌ in‌ four‌ main‌ categories‌ (human‌ resource‌ supply,‌‌‌‌ training,‌‌‌‌ recruitment,‌‌‌‌ and‌ retention),‌‌‌‌ 71‌ sub-categories,‌‌‌‌ and‌ 20‌ concepts‌ (strategic‌ orientation)‌‌‌‌ related‌ to‌ the‌ human‌ resource‌ policy‌ of‌ the‌ petroleum‌ industry.

Today, one of the criteria for success in gaining market share in the Apparels market is to focus and invest in the organizational brand, which is achieved as a result of the positive performance of the organization and the organizational brand. Therefore, the purpose of this study is to investigate the effect of brand title, brand awareness, brand attitude, and brand reputation on brand performance in the Garment industry (case study of LC_man brand). The research method is applied in terms of purpose and in the category of descriptive and survey research. The studied statistical population is the customers of LC_man brand in Tehran. The sampling method was simple random sampling, and 384 people were selected and distributed as a sample using Krejcie and Morgan's table. Data were obtained using standard questionnaires. To calculate the reliability of the questionnaire, Cronbach's alpha and combined reliability and content validity from the perspective of professors were used. Smart Pls3 software was used for data analysis. The result of the hypotheses showed that Brand signature (including two dimensions of brand name and brand logo) has a positive and significant effect on brand attitude and brand awareness of customers. Also, brand awareness has a positive and significant impact on brand attitude and these two variables also affect the brand reputation and finally the brand reputation has a positive and significant effect on brand performance.

identity and customer purchase behaviour. The purpose of this study is to study the factors affecting the customer purchase behaviour towards clothing with Sasanian empire designs employing a combined statistical method including TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) and AHP (Analytic Hierarchy Process). The statistical population of the study included five selected buyers from a pool of respondents by targeted sampling method. The indicators were extracted at two levels, which include criteria and options, using library studies and expert opinions. According to the research findings, in the first level, the brand’s subjective image criterion with a weight of 0.449 was the first priority. The brand advertisement criterion with a weight of 0.311 was the second priority. The criterion for buying behaviour with a weight of 0.240 was the third priority. In the second level, the options of style, color & fabric, and the use of accessories were ranked the first, second, and third, respectively. Therefore, the option of fashion style was more important than the option of color and fabric and the use of accessories.

Sports apparel brands have played a significant role in the world of business and marketing. The present study aimed to investigate the impact of brand awareness on the brand equity in the sports apparel industry by conducting a descriptive research survey and the statistical techniques. Six hundred fifty individuals, including the physical education trainers and students, clothing designers, and textile engineers, participated in this survey. A designed survey questionnaire was employed for data collection. The reliability of the questionnaire was validated using Cronbach's alpha, and the result was 0.86, indicating a high level of internal consistency. The results of our study showed that the shopping value, satisfaction, and loyalty for foreign brands were generally higher than those of Iranian brands and significantly related. The most substantial relation was found to be between brand awareness and the perceived quality of the brand among several other aspects, including the equity, style, fidelity, design & pattern, brand association, the quality of clothing, color and fabric, and price.

Poor interaction between fillers and epoxy matrix is one of the major limitations to developing epoxy composites usage. In this study, effect of corona process on carbon nanotubes reinforced epoxy composite properties was evaluated. The structure and morphology of epoxy composites has been examined by scanning electron microscopy (SEM) and its chemical structure has been elucidated by Fourier transform infrared spectroscopy (FT-IR). Thermal, mechanical and electrical properties of the prepared composites were also assessed. To analyze the relationship between the interfacial interactions in the nanocomposites and tensile performance, a theoretical model germane to the mechanical behaviors of the nanocomposite was applied. According to the results, it was found that the corona modification of carbon nanotubes resulted in breaking of fillers agglomerates and improved their dispersion. The mechanical properties and thermal stability of modified samples were improved with respect to unmodified ones. Moreover, the prepared epoxy composite possessed excellent electrical conductivity.

Nowadays, brands influence various aspects of life and sometimes even represent our ways of life and culture. In this research, we investigate the impact of color index in clothes on customer loyalty by considering the mediation role of the brand character. A descriptive data collection and random sampling method were used in the statistical population of the customers of LC.Waikiki stores in the Mazandaran province. Following the Cochran formula, 384 customers were randomly selected as the sample population and asked to answer a Likert Scale standard questionnaire (a five point scale). The Cronbach's Alpha Coefficient of 0.813 was calculated which confirmed the validity and reliability of the questionnaires. SPSS22 and LISREL8.54 software were used for data analysis of the Kolmogorov–Smirnov, and Kaiser-Meyer-Olkin tests. The results indicate that the clothes’ color has a direct and meaningful effect on the customer loyalty. However, it is observed that the brand’s character and identity in relation to the clothes’ color, play a minor mediation role in the customer loyalty.

Today, the value of the brand is not neglected to anyone in the word of marketing. A famous brand can creat a credit beyond the usual one for an organization. The purpose of this study is to investigate the effect of clothing related attributes on the special value of the brand of men and woman in LC Wikiki stores of Mazandaran province. The method used in this research is descriptive correlational. The variables of the results of the project for the brand value of the men and women's set were examined in the research process. Than, the fied method was applied and based on the collected data, the final analysis was done to confirm or reject the main research hypotheses using LISREL8.54 and spss22 software. The statistical population of the study was stores of Mazandaran province located in babolsar and Kelarabad. The sampling method was stratified randomly and the sample was 384 LC Waikiki customers in Mazandaran province. The content validity method was used to validate the questionnaire and Cronbach's alpha method was used to confirm the reliability of the questionnaire. The method of statistical analysis of the data was descriptive and inferential statistics and the method of testing the hypothesis was the structural equation. Structural equation modeling was used in this study. The results of this research show that the brand features of the dress effect on the brand equity.

Some coated nanocomposites containing ZnO and TiO2 nanoparticles were prepared and the antibacterial activity of nanocomposites was evaluated against Escherichia coli and Staphylococcus aurous Nanocomposites were coated by polyamide coating solution. Nano ZnO and nano TiO2 were dispersed using a fixed power sonicator. Polypropylene surface was modified by a corona discharge method. To study the antibacterial effect of the prepared nanocomposites، a film contact method was performed and antibacterial property of the nanocomposites was estimated by dilution method. Coated nanocomposites exhibited excellent antibacterial activity in each of three antibacterial tests.