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1
Estimation of CIE tristimulus values under various illuminants
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Ali Shams-Nateri
Yıl :
2009
Ali Shams-Nateri
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In this work, a procedure is described to estimate the CIE tristimulus values of Munsell color chips under new illuminants from CIE tristimulus values under specific illuminant. The estimation was performed by multiple linear regression (MLR) and principal component analysis (PCA) techniques. In addition, the effects of illuminants combination and Munsell hue, value and chroma on reconstruction of CIE tristimulus values were evaluated in both methods. The results obtained indicate that the performance of principal component method is better than multiple regression method. The accuracy of estimation depends on the initial and target illuminants and hue, chroma and value of samples. © 2009 Wiley Periodicals, Inc. Col Res Appl, 34, 100–107, 2009
DOI : 10.1002/col.20477
ISSN: 0361-2317
Sayı: 2
Cilt: 34
Sayfa: 100-107
2
Prediction of dye concentrations in a three-component dye mixture solution by a PCA-derivative spectrophotometry technique
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Ali Shams-Nateri
Konu :
General Chemistry, General Chemical Engineering, Human Factors and Ergonomics
Yıl :
2010
Ali Shams-Nateri
Yayıncı Web Sitesi
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Kaydet Alıntıla
Derivative spectrophotometry is one of the most important techniques that can be used to determine the dye concentration. In addition, principal component analysis (PCA) is a linear method to condense the dimensionality of large numbers of absorbance spectra. In this work, PCA and derivative spectrophotometry techniques are used to improve the accuracy of Beer's law prediction of the concentrations in three‐component dye mixtures. The performance of the new method is compared with the normal Beer's law by calculation absolute error, relative error, and ternary relative error of prediction. As obtained results indicate, the prediction accuracy of dye concentration prediction in PCA‐derivative spectrophotometry method is higher than normal Beer's law method. © 2009 Wiley Periodicals, Inc., Col Res Appl, 2010.
DOI : 10.1002/col.20553
ISSN: 0361-2317
Sayı: 1
Cilt: 35
Sayfa: 29-33
3
Reusing wastewater of madder natural dye for wool dyeing
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
Journal of Cleaner Production
Yayıncı:
Elsevier
Yazar(lar) :
Ali Shams-Nateri
Yıl :
2011
Ali Shams-Nateri
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Natural dye is environment-friendly which is usually extracted from vegetative material. In this work, the wastewater of madder dyebath is reused for wool dyeing. Initially, the madder absorption behavior on wool fiber is determined by new methods based on spectroscopic information of dye solution. The absorbance spectra change is explained in terms of absorbability of chemical components of madder on wool by using several techniques such as principal component analysis, colorimetry, statistical and derivative spectroscopy techniques. The obtained results indicate that the chemical components of the initial dye solution are different from those remaining in the exhausted dye solution. In reusing wastewater of wool dyeing with madder, the exhausted dyebath is reconstructed by adding madder and water. The analyzing color parameter and fastness properties of samples indicate that the quality of samples dyed in reconstructed dyebath is the same as initial wool dyeing. The economic analysis shows that the reusing wastewater caused 19.91% cost saving in wool dyeing with madder.
DOI : 10.1016/j.jclepro.2010.12.018
Anahtar Kelimeler : Natural dye, Reusing, Madder, Wool, Absorption behavior, Dyeing
ISSN: 0959-6526
Sayı: 6-7
Cilt: 19
Sayfa: 775-781
Sınıflandırma :
4
Scattering behavior of nonabsorbing metallic nanoparticles
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
Optics & Laser Technology
Yayıncı:
Elsevier
Yazar(lar) :
Ali Shams-nateri
Yıl :
2012
Ali Shams-nateri
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Kaydet Alıntıla
The optical property of nanosized metallic particles is unique and size-dependent, which cause color variation. In this work, the relationship between diameter and refractive index of nonabsorbing metallic nanoparticles and their scattering properties is studied by using Mie theory. Obtained results indicate that the optical scattering of metallic nanoparticle depends on their refractive index and diameter. The effect of refractive index on optical scattering depends on the nanoparticle diameter. So that, for very fine nanoparticle (10 nm diameter) the effect of refractive index on scattering is not significant. But the effect of refractive index of large size nanoparticle (700–900 nm diameter) on their optical scattering is higher than fine and medium size nanoparticles. The wavelength with maximum scattering depends on refractive index and nanoparticles diameter. In addition, the colorimetric study indicates that the color of nanoparticle depends on their size and refractive index. So that, the lightness, hue, and colorfulness of nanoparticles is changed by changing size and refractive index.
DOI : 10.1016/j.optlastec.2012.01.013
Anahtar Kelimeler : Metallic nanoparticles, Optical-properties, Scattering
ISSN: 0030-3992
Sayı: 6
Cilt: 44
Sayfa: 1670-1674
5
Determination of bicomponent dye solutions by means of zero-crossing-point derivative spectrophotometry
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Ali Shams Nateri , Ehsan Ekrami
Konu :
General Chemistry, General Chemical Engineering, Human Factors and Ergonomics
Yıl :
2008
Ali Shams Nateri
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Kaydet Alıntıla
In this study, a new spectrophotometric method was developed for the determination of some textile dyes with different types of overlapping spectra. The binary mixtures of five dyes with yellow, scarlet, red, blue, and navy blue colors were analyzed by zero‐crossing‐point first‐derivative spectrophotometry. The absorption spectra of the mixtures prepared in different ratios were recorded between 400 and 700 nm. First derivative amplitudes at appropriate zero‐crossing wavelengths were selected for the determination of dyes in the mixtures. The proposed method was successfully applied to the determination of dyes with overlapping spectra in their bicomponent mixtures. The proposed derivative method is simple, rapid, and suitable for quantitative analysis of bicomponent dye solutions. © 2008 Wiley Periodicals, Inc. Col Res Appl, 33, 307–311, 2008.
DOI : 10.1002/col.20415
ISSN: 0361-2317
Sayı: 4
Cilt: 33
Sayfa: 307-311
6
Effect of classification by competitive neural network on reconstruction of reflectance spectra using principal component analysis
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Abbas Hajipour , Ali Shams-Nateri
Yıl :
2016
Ali Shams-Nateri
Yayıncı Web Sitesi
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Kaydet Alıntıla
The best way to describe a color is to study its reflectance spectrum, which provide the most useful information. Different methods were purposed for reflectance spectra reconstruction from CIE tristimulus values such as principal components analysis. In this study, the training samples were first divided into 3, 6, 9, and 12 subgroups by creating a competitive neural network. To do that, L*a*b*, L*C*h or L*a*b*C*h were introduced to neural network as input elements. In order to investigate the performance of reflectance spectra reconstruction, the color difference and RMS between actual and reconstructed data were obtained. The reconstruction of reflectance spectra were improved by using a six or nine‐neuron layer with L*a*b* input elements. © 2016 Wiley Periodicals, Inc. Col Res Appl, 42, 182–188, 2017
DOI : 10.1002/col.22050
ISSN: 0361-2317
Sayı: 2
Cilt: 42
Sayfa: 182-188
7
Improve neural network-based color matching of inkjet textile printing by classification with competitive neural network
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Abbas Hajipour , Ali Shams-Nateri
Konu :
General Chemistry, General Chemical Engineering, Human Factors and Ergonomics
Yıl :
2018
Ali Shams-Nateri
Yayıncı Web Sitesi
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Kaydet Alıntıla
Nowadays, with increasing use of digital printing in the textile industry, characterization and color matching are very much considered. There is a very complicated relationship between pixel values of input digital image and colorimetric parameters of printed textile samples. One of the most important used methods for inverse characterization of printer and prediction of CMYK digital values is neural network. In this study, the prediction accuracy of CMYK digital values were improved by dividing the training samples into 2, 4, 6, 8, and 10 subgroups using creating a competitive neural network. For classification of samples, L*a*b* or XYZ were introduced to a competitive neural network as input parameters. Then, the classification of test samples was performed by trained competitive neural network. To predict the of CMYK digital values of input digital image, a cascade‐forward back propagation neural network is trained by L*a*b* of each subgroup. The results obtained show that the prediction accuracy of CMYK digital values were improved by suggested method. The best result was obtained by classification of samples with L*a*b* into eight subgroups and using a cascade‐forward back propagation neural network with 4, 4, and 4 neurons in hidden layers.
DOI : 10.1002/col.22246
ISSN: 0361-2317
Sayı: 1
Cilt: 44
Sayfa: 65-72
8
Expanding the color gamut of inkjet textile printing during color matching
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Abbas Hajipour , Ali Shamsu2010Nateri
Yıl :
2021
Ali Shams‐Nateri
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Kaydet Alıntıla
One of the most important subjects of digital printing is evaluation of color gamut mapping. A printer can only reproduce colors that are in its color gamut. Maybe, a color tolerance between reference sample and printed sample is in agreement between manufacturer and customer. The goal of this work is to estimate the expansion of the color gamut of an inkjet textile printer by consideration of the acceptable (predetermined) color difference during color matching. For analyzing the color gamut, a standard color chart IT8.7/4‐2005 CMYK target was printed by nine different mixtures of CMYK, and then the reflectance spectra and colorimetric parameters of the printed samples were measured. The inks used were disperse water‐based inks that were printed on the polyester fabric. The maximum acceptable color difference in this study was equal to 2 CIELAB units for all colors. In order to estimate the color gamut with the maximum acceptable color difference, for all boundary points of gamut, expanded points were obtained by Euclidean distance less than  = 2. The results show that when the acceptable color difference is considered in color gamut measuring, the area and volume of the color gamut are increased and so, the reproducibility of printer is increased. The maximum and minimum expansions of color gamut volumes were obtained by the mixtures with minimum and maximum color gamuts, respectively. The volume expansion of the mixture with the minimum color gamut volume was 34.20%, while the volume expansion of the mixture with the maximum color gamut volume was 28.06%.
DOI : 10.1002/col.22681
ISSN: 0361-2317
Sayı: 6
Cilt: 46
Sayfa: 1218-1226
9
The Factor Analysis of Problems of Rural Waste Management in Qazvin Township
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
Rāhburdhā-yi tusi̒ah-i rūstāyī
Yazar(lar) :
Parvaneh Safari Alamouti , Ali Shams
Yıl :
2016
Ali Shams
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Kaydet Alıntıla
The descriptive- survey research was conducted to evaluate the rural waste management problems in Qazvin Township. The statistical population was consisted of all rural households in Qazvin Township (N=31338) which were selected and studied base on Cochran sampling formula and using randomized multi-stage sampling method 464. The research tool was a researcher made questionnaire. In this field, the content and face validity was verified by an expert panel. The reliability of research tool was acquired by conducting a pilot study and calculation cronbach alpha coefficient equals to 0.9. Data were analyzed by SPSS/Win 18 software and exploratory factor analysis technique was used. The results revealed that six factors named as final disposal problem of household waste management (17/11 percent), educational and cultural problems of household waste (14/11 percent), health problems of household waste (12/11 percent), knowledge and health problems of agricultural wastes (8/98 percent), knowledge problem of household waste (6/99 percent), and education problem of agricultural waste (5/47 percent) were explained as 64.68 percent of total waste problems in the region.
DOI : 10.22048/rdsj.2016.13610
Anahtar Kelimeler : Agricultural waste, Household waste, Problems and bottlenecks, Qazvin
Cilt: 3
Sayı: 1
Sayfa: 6 - 6
Sınıflandırma :
10
The effect of fabric density on the quality of digital printing on polyester
Dergi Makalesi

Dergi Makalesi
Kaynak :
Springer Link
Dergi:
Fibers and Polymers
Yazar(lar) :
Abbas Hajipour , Ali Shams-Nateri
Konu :
Polymers and Plastics, General Chemical Engineering, General Chemistry
Yıl :
2017
Ali Shams-Nateri
Yayıncı Web Sitesi
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Kaydet Alıntıla
One of the most important benefits of textile inkjet printing is the print quality. However, some factors affect the print quality, such as the weave density. In this research, the effect of weft density on the inkjet printing of polyester was investigated. Lines with different widths were printed in the warp and weft directions, and the print quality was evaluated as the line width. The obtained result showed that the weft density affected the line width and the print quality decreased with an increased weft density. The width of the lines printed in the weft direction is more than the width of lines printed in the warp direction. Also, the analysis of variance (ANOVA) results confirmed the effect of the weft density and the printed lines direction on the line width and print quality. The investigation of the relation between the print quality and the vertical wicking shows a very poor relation between the two.
DOI : 10.1007/s12221-017-7441-z
Anahtar Kelimeler : Fabric density, Print quality, Polyester, Digital printing
ISSN: 1229-9197 1875-0052
Sayı: 12
Cilt: 18
Sayfa: 2462-2468
11
Pinpointing the classifiers of English language writing ability: A discriminant function analysis approach
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
Applied Research on English Language
Yazar(lar) :
Mohammad Ali Shams , Reza Pishghadam
Yıl :
2013
Mohammad Ali Shams
Tam Metin
Kaydet Alıntıla
  The major aim of this paper was to investigate the validity of language and intelligence factors for classifying Iranian English learners` writing performance. Iranian participants of the study took three tests for grammar, breadth, and depth of vocabulary, and two tests for verbal and narrative intelligence. They also produced a corpus of argumentative writings in answer to IELTS specimen. Several runs of discriminant function analyses were used to examine the classifying power of the five variables for discriminating between low and high ability L2 writers. The results revealed that among language factors, depth of vocabulary (collocational knowledge) produces the best discriminant function. In general, narrative intelligence was found to be the most reliable predictor for membership in low or high groups. It was also found that, among the five sub-abilities of narrative intelligence, emplotment carries the highest classifying value. Finally, the applications and implications of the results for second language researchers, cognitive scientists, and applied linguists were discussed.Â
Anahtar Kelimeler : L2 writing, L2 writing, narrative intelligence, depth and breadth of vocabulary, grammar, verbal intelligence, discriminant function analysis, narrative intelligence, depth and breadth of vocabulary, grammar, verbal intelligence, Discriminant function analysis
Cilt: 2
Sayı: 1
Sayfa: 45 - 60
Sınıflandırma :
12
An analytical model for sandwich panels made of textile-reinforced concrete
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
Construction and Building Materials
Yayıncı:
Elsevier
Yazar(lar) :
Ali Shams , Josef Hegger , Michael Horstmann
Yıl :
2014
Ali Shams
Yayıncı Web Sitesi
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Kaydet Alıntıla
Textile-reinforced concrete (TRC) is a composite material that consists of high-strength, fine-grained concrete and non-corrosive textile reinforcements, which are mainly fabricated of AR-glass or carbon fibers in order to design filigree and lightweight concrete structures. In order to investigate the load-bearing behavior of sandwich panels with thin TRC-facings and resilient insulation cores applied for self-supporting façades, a series of tests have been performed at RWTH Aachen University. The present paper summarizes the results of the experimental investigations and presents an analytical model that enables a realistic calculation of the load-bearing-deflection behavior of the panels tested in Aachen.
DOI : 10.1016/j.conbuildmat.2014.04.025
Anahtar Kelimeler : Textile reinforced concrete, Sandwich panel, Analytical model cracking, Composite action, Load-bearing behavior
ISSN: 0950-0618
Cilt: 64
Sayfa: 451-459
Sınıflandırma :
Mimarlık %100
13
Experimental investigations on Textile-Reinforced Concrete (TRC) sandwich sections
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
Composite Structures
Yayıncı:
Elsevier
Yazar(lar) :
Ali Shams , Michael Horstmann , Josef Hegger
Yıl :
2014
Ali Shams
Yayıncı Web Sitesi
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Kaydet Alıntıla
Textile-Reinforced Concrete (TRC) is a new construction material that offers several advantages over steel reinforced concrete. These advantages are particularly relevant for applications requiring thin-walled, structural elements with a high load-carrying capacity. For example, sandwich panels, made of two thin TRC facings and a core of polymeric rigid foam present an attractive choice for modern building envelopes. These combine low weight with a high structural capacity, while simultaneously fulfilling structural and physical demands. The development of sandwich panels made of TRC has been the subject of several research projects at the Institute for Structural Concrete of RWTH Aachen University in Germany. The present paper outlines the testing procedure of sandwich sections made of TRC and their load-carrying behaviour subjected to tension, shear forces, and bending moments.
DOI : 10.1016/j.compstruct.2014.07.056
ISSN: 0263-8223
Cilt: 118
Sayfa: 643-653
Sınıflandırma :
14
The effect of TiO 2 nanopigment on the optical properties of polyester fabric in UV–VIS–NIR regions
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Negin Piri , Ali Shamsu2010Nateri , Javad Mokhtari
Yıl :
2018
Ali Shams‐Nateri
Yayıncı Web Sitesi
Tam Metin
Kaydet Alıntıla
The particle size parameter is a key factor that affects radiative properties of nanopigments, and consequently, pigments of the same type but different sizes represent different spectral performance. Therefore, current study dealt with a systematic experimental investigation on the effect of TiO2 pigmented coatings on spectral reflectance and color performance of white and colored polyester fabrics in UV, VIS, and NIR region of electromagnetic spectrum, with a special emphasis on VIS region. In order to accomplish this target, polyester fabrics were coated with TiO2 nanopigment with various concentrations and different diameters, and their reflectance spectra were measured using spectrophotometric method. Two‐way analysis of variance (ANOVA) was utilized to investigate the significance of the effect of TiO2 nanopigment on the color performance of coated fabrics. According to experimental observations, an organized color shift appears in color coordinate of fabrics coated with TiO2 nanopigment of various sizes. Moreover, although TiO2 nanopigment with 35 nm diameter has the most significant impact on short wavelength region (UV region), the effect of pigment with 250 nm diameter is more noticeable on NIR region as long wavelength region.
DOI : 10.1002/col.22334
ISSN: 0361-2317

15
Textile colour matching using linear and exponential weighted principal component analysis
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Coloration Technology
Yazar(lar) :
Jalil Mohtasham , Ali Shams Nateri , Hale Khalili
Konu :
Materials Science (miscellaneous), General Chemical Engineering, Chemistry (miscellaneous)
Yıl :
2012
Ali Shams Nateri
Yayıncı Web Sitesi
Tam Metin
Kaydet Alıntıla
In this work, linear and exponential weighted principal component analysis techniques based on spectral similarity were employed for the prediction of dye concentration in coloured fabrics, which had been dyed with three component dye mixtures. The matching strategy was based on the equalisation of the first three principal component coordinates of the weighted reflectance curves of the predicted and target sample in a dynamic 3D eigenvector space. The performance of the proposed algorithm was evaluated by the root mean square differences of the reflectance curves and the relative error of the concentration prediction, as well as the metamerism index. The obtained results indicated that the developed exponential weighted principal component analysis method is more accurate than the spectrophotometric method and the simple principal component analysis matching strategy.
DOI : 10.1111/j.1478-4408.2012.00362.x
ISSN: 1472-3581
Sayı: 3
Cilt: 128
Sayfa: 199-203
16
Optimizing the setup of a flatbed color scanner for color measurement using full factorial design
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Color Research & Application
Yazar(lar) :
Elham Hasanlou , Ali Shamsu2010Nateri , Hossein Izadan
Konu :
General Chemistry, General Chemical Engineering, Human Factors and Ergonomics
Yıl :
2019
Ali Shams‐Nateri
Yayıncı Web Sitesi
Tam Metin
Kaydet Alıntıla
The application of flatbed color scanners for the measurement of color in various industries, especially textile industry, has received a great deal of attention. The initial setup of a scanner and the investigation of factors with a significant effect on scanner outputs are necessary to measure a reliable color using the scanner. In the present study, the setup of a flatbed color scanner was optimized using a full factorial design technique. Three factors, including the scanning position on the glass surface of the scanner (A), cutting size of an image in pixels (B), and bit depth (C), at different levels as input factors, and signal‐to‐noise ratio and variance of the scanned image as the responses were considered for the evaluation of the reliability of the scanner color measurement. The results of analyzing the factorial design indicate that each of the three factors played a significant role in the scanner setup for the color measurement so that factor A demonstrated the most significant impact on the responses.
DOI : 10.1002/col.22406
ISSN: 0361-2317
Sayı: 5
Cilt: 44
Sayfa: 718-729
17
The optical properties of PVA/TiO2composite nanofibers
Dergi Makalesi

Dergi Makalesi
Kaynak :
Wiley Online Library
Dergi:
Journal of Applied Polymer Science
Yazar(lar) :
Parastoo Ahmadpoor , Ali Shams Nateri , Vahid Motaghitalab
Konu :
Materials Chemistry, General Chemistry, Surfaces, Coatings and Films, Polymers and Plastics
Yıl :
2013
Ali Shams Nateri
Yayıncı Web Sitesi
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Kaydet Alıntıla
The electrospun nanofibers emerge several advantages because of extremely high specific surface area and small pore size. This work studies the effect of PVA nanofibers diameter and nano‐sized TiO2 on optical properties as reflectivity of light and color of a nanostructure assembly consisting polyvinyl alcohol and titanium dioxide (PVA/TiO2) composite nanofibers prepared by electrospinning technique. The PVA/TiO2 composite spinning solution was prepared through incorporation of TiO2 nanoparticles as inorganic optical filler in polyvinyl alcohol (PVA) solution as an organic substrate using the ultrasonication method. The morphological and optical properties of collected composites nanofibers were highlighted using scanning electron microscopy (SEM) and reflective spectrophotometer (RS). The reflectance spectra indicated the less reflectance and lightness of composite with higher nanofiber diameter. Also, the reflectance and lightness of nanofibers decreased with increasing nano‐TiO2 concentration. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
DOI : 10.1002/app.39147
ISSN: 0021-8995
Sayı: 1
Cilt: 130
Sayfa: 78-85
18
Factors Affecting the Greenhouse Owners’ Attitude toward Sustainable Agriculture in Zanjan Province
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
Journal of Agricultural Science and Sustainable Production
Yazar(lar) :
Zahra Hooshmandan Moghaddam Fard , Ali Shams
Yıl :
2017
Ali Shams
Tam Metin
Kaydet Alıntıla
Due to the low compliance of greenhouse production with the principles of sustainable agriculture, a meaningful effort in this regard needs to be done. One of the important factors affecting the success of future planning is the positive attitude of greenhouse owners toward sustainable agriculture. The purpose of this descriptive- correlational study was to investigate factors affecting greenhouse owners’ attitude toward sustainable agriculture. The validity of the questionnaire was verified by a panel of experts in the related field and to obtain its reliability, calculated alpha Cronbach coefficient was higher than 0.75 for different parts. The statistical population consisted all greenhouse owners in Zanjan province (N=80) and based on Krejci and Morgan sampling Table and using randomized sampling method 66 greenhouse owners selected. Results showed that majority of greenhouse owner use moderately of information channels and mass media. The majority of greenhouse owners (59.6 percent) had a medium level of knowledge regarding sustainable agriculture and Majority of them (73.7 percent) had a positive attitude toward sustainable agriculture. Correlation coefficient showed that greenhouse owners’ attitude had a positive meaningful correlation with information using level, income from the greenhouse, number of educational classes and their job satisfaction but a negative meaningful correlation with the number of household members participating in the activity. Regression analysis revealed that five variable of information using level, the number of household members participating in activity, knowledge and daily time spending in the greenhouse were explained 55.4 percent of greenhouse owners’ attitude toward sustainable agriculture.
Anahtar Kelimeler : Attitude, Greenhouse Owners, Knowledge, Sustainable Agriculture, Zanjan Province
Cilt: 27
Sayı: 1
Sayfa: 165 - 177
Sınıflandırma :
19
The effect of weave structure on the quality of inkjet polyester printing
Dergi Makalesi

Dergi Makalesi
Kaynak :
Taylor and Francis
Dergi:
The Journal of The Textile Institute
Yayıncı:
Informa UK Limited
Yazar(lar) :
Abbas Hajipour , Ali Shams Nateri
Konu :
Industrial and Manufacturing Engineering, Materials Science (miscellaneous), General Agricultural and Biological Sciences, Polymers and Plastics
Yıl :
2018
Ali Shams Nateri
Yayıncı Web Sitesi
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Kaydet Alıntıla
In this study, the print quality of lines were investigated in warp and weft directions that were inkjet printed on various weave structures of polyester such as plain, 2/2 twill, 3/1 twill, 3/2 twill and 4/1 twill. In order to study the effect of weave structure on the quality of inkjet printing on polyester fabrics, lines having a width of 1 mm, 2 mm, and 4 mm were inkjet-printed and the print quality was measured as the line width. The quantitative analysis of lines width was performed by scanning the fabrics with a scanner. The obtained result showed that the weave structure is effective on the lines width and print quality, and the plain weave structure had the worst print quality in both directions. Also, the width of lines printed in the weft direction was more than lines printed in the warp direction which is possibly due to more density of warp than weft. The effect of weave structure and print direction on lines width and print quality was also confirmed by the analysis of variance (ANOVA) results. The image processing was shown that the ink spreading shape on the various fabrics is different and is affected by the weave structure and the print direction.
DOI : 10.1080/00405000.2018.1529722
Anahtar Kelimeler : Print quality, inkjet printing, polyester, weave structure, print direction
ISSN: 0040-5000
Sayı: 6
Cilt: 110
Sayfa: 799-806
20
امروزه توجه به کشاورزی ارگانیک به دلیل آسیبهای ناشی از محصولات کشاورزی متعارف دوچندان شده است. برنامهریزی و تشویق کشاورزان به کشاورزی ارگانیک در مرحله اول نیازمند شناخت وضعیت موجود نگرشی آنها و عوامل مؤثر بر نگرش آنهاست. این تحقیق از نوع توصیفی
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
Journal of Agricultural Science and Sustainable Production
Yazar(lar) :
Zahra Hooshmandan Moghaddam Fard , Ali Shams
Yıl :
2016
Ali Shams
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Kaydet Alıntıla
In recent years, focusing on organic agriculture has been emphasized because of the negative effect of conventional agriculture. Any persuading planning of farmers to use organic agriculture methods requires investigating their current attitude toward organic agriculture. The main purpose of this descriptive-correlational study was to investigate effective factors on farmers' attitude towards organic agriculture. The statistical population consisted of all wheat farmers in Khodabande township (N= 24350) of them 275 were identified based on Cochran’s formula and through a stratified randomized sampling method. The research tool was a researcher-made questionnaire which its validity was verified by a panel of experts in the related field and to check its reliability, a Cronbach’s Alpha coefficient was calculated 0.78. The results showed that the attitude of the majority of respondents (50.9 percent) towards organic farming was at the neutral level and the attitude of 49.1 percent was positive. Correlation analysis revealed that age, family household number and experience had a negative meaningful correlation with farmers’ attitude but education, income and acquaintance with organic farming had a positive meaningful correlation. Comparison analysis showed that there were significant differences between the farmers’ attitude towards organic agriculture based on groups of different cultivation method, using of pesticide and Herbicide. In addition, logistic regression analysis indicated that 46.5 of farmers' attitude explained by three variables named as farmer’s experience, their acquaintance with organic farming and income.
Anahtar Kelimeler : Agricultural Development, Attitude, Khodabandeh Township, Organic Agriculture, Wheat Farmers
Cilt: 26
Sayı: 3
Sayfa: 155 - 170
Sınıflandırma :
Çevre %68
Çevre %67
21
Wages and Productivity in Iran’s Manufacturing Industries With a Production Boom Strategy
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
فصلنامه سیاست‌های راهبردی و کلان
Yazar(lar) :
Mohammad Ali Feizpour , Ali Shams Esfandabadi
Yıl :
2019
Ali Shams Esfandabadi
Yayıncı Web Sitesi
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In the economic literature, wage deviation from labor productivity causes economic inefficiency. However, evidence in Iran’s economy indicates a lack of coordination between wage changes and labor productivity, and the gap between the two variables has increased over time. Accordingly, the present study has two main approaches: first, study of the relationship between wages and labor productivity in the manufacturing industries of Iran’s provinces during the years 1392-1383 and evaluation of the impact of wage productivity (based on classical theories); second, examining the effectiveness of wage productivity (based on efficiency wage theories). Using the combined data and the generalized least squares method, the results show that both classical and wage theories are correct. In other words, while wages have a positive and significant effect on labor productivity, they also are affected by it. However, its impact factor is far greater than its susceptibility factor. Therefore, from the policy point of view, the results show the necessity of paying attention to wages in order to increase labor productivity in the manufacturing industries of Iran’s provinces.
DOI : 10.32598/JMSP.7.3.1
Anahtar Kelimeler : wages, productivity, labor productivity, iranu2019s provinces, manufacturing industries
Cilt: 7
Sayı: 27
Sayfa: 326 - 345
Sınıflandırma :
22
Solar spectral performance of nanopigments
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
Solar Energy Materials and Solar Cells
Yayıncı:
Elsevier
Yazar(lar) :
Negin Piri , Ali Shams-nateri , Javad Mokhtari
Yıl :
2017
Ali Shams-nateri
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Solar spectral behavior of nanopigments has been an important issue in many practical relevance due to their tunable properties. There are extensive literatures on radiative transfer through pigmented coating but they are generally restricted to a small range of materials with specific properties and particular applications. Current study, on the other hand, concerns with a comprehensive look at contribution of fundamental characteristics of nanopigments on spectral behavior of the pigmented coatings. In order to accomplish this goal, a Discrete Ordinate Method (DOM), known as Multi Flux (MF) model in color science, has been applied on spherical particles embedded in nonabsorbing medium, and their optical responses including reflectance, transmittance and absorption has been studied over solar spectrum, with special emphasis on VIS region. The effect of various indices of refraction, particle sizes and volume fractions has been further investigated. Obtained results reveal that, pigments with different fundamental and morphological structures represent interesting optical behavior which is very promising in optimization of spectrally selective pigmented coatings. The results from MF model were subsequently validated using spectrophotometric measurements on Titanium dioxide nanopigments coated on white polyester substrate, which represented a good agreement with collected data from MF model.
DOI : 10.1016/j.solmat.2016.12.036
Anahtar Kelimeler : Solar spectra, Optical property, Nanopigment, Multi Flux model, Titanium dioxide
ISSN: 0927-0248
Cilt: 162
Sayfa: 72-82
Sınıflandırma :
23
Predition of Textile Fabric Color by Digital Camera
Dergi Makalesi

Dergi Makalesi
Kaynak :
Emerald Publishing
Dergi:
Research Journal of Textile and Apparel
Yayıncı:
Emerald Publishing
Yazar(lar) :
Ali Shams Nateri
Konu :
Mechanical and Materials Engineering
Yıl :
2008
Ali Shams Nateri
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The main objective of this study is to highlight the relationship between RGB values of digital camera as a device-dependent color space and a device-independent CIE color space. Calibration and testing databases are the colorimetric specifications of colored polyester fabrics. The colored fabrics were dyed with a variety of disperse dyestuffs. Camera characterization was done based on the polynomial regression technique. The methods adopted in the study were non-linear filtering applied to camera RGB values and a polynomial regression function directly applied to the CIELAB space. The performances of the methods improved by increasing the number of terms in the polynomial. The estimation errors of the linear polynomial regression to CIEXYZ, the nonlinear polynomial regression to CIEXYZ, the linear polynomial regression to CIELAB, and the nonlinear polynomial regression to CIELAB were 3.29, 4.43, 3.05, and 3.04 DE*ab respectively. The generalization capability decreased by increasing the number of terms in the polynomial regression. The best generalization capability was obtained by the linear polynomial regression to CIELAB. The best result was obtained by non-linear filtering while the second-best result was obtained by the polynomial regression to the CIELAB values.
DOI : 10.1108/RJTA-12-02-2008-B001
Anahtar Kelimeler : Camera, Evaluation, Fabric, Textile, Color, Polynomial regression
ISSN: 1560-6074
Cilt: 12
Sayı: 2
Sayfa: 1-12
Sınıflandırma :
24
Synthesis and characterization of novel reactive dyes with simultaneous insect-repellent and anti-bacterial properties
Dergi Makalesi

Dergi Makalesi
Kaynak :
Springer Link
Dergi:
Fibers and Polymers
Yazar(lar) :
Javad Mokhtari , Ali Shams-Nateri , Parnian Ferdosi
Konu :
Polymers and Plastics, General Chemical Engineering, General Chemistry
Yıl :
2014
Ali Shams-Nateri
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N,N-Diethyl-m-toluamide (DEET) is widely used as an insect-repellent. Sulfonamides are an important class of anti-bacterial drugs. In order to combine the strength of anti-bacterial activities of sulfonamides and insect-repellent property of DEET, three azo reactive dyes were designed and synthesized. To do this, the diazoniom salts of sulfonamides viz. 4-amino-N-(4-methyl-2-pyrimidinyl) benzene sulfonamide, 4-amino-N-(4-dimethyl-2-pyrimidinyl) benzene sulfonamide and 4-amino-N-(4,6-dimethyl-2-pyrimidinyl) benzene sulfonamide were prepared using HCl and NaNO2. The resulting diazoniom salts were then coupled to the coupling component containing N,N-diethyl-m-toluamide to produce the novel dyes. The synthesized dyes were filtered off and then purified. To investigate and analyze the dyes, analytical methods such as 1H-NMR, FTIR, UV-visible spectroscopy, and elemental analysis were used. Consequently, the anti-bacterial activities of dyes were measured with E. coli and P. aeruginosa as a Gram-negative strain and S. aureus and S. mutans as a Gram-positive strain according to MIC method. The insect-repellent efficacy of the dyes was studied using standard methods for Anophle mosquito repellent. The results confirmed anti-bacterial and insect-repellent activity of the dyes.
DOI : 10.1007/s12221-014-1369-3
Anahtar Kelimeler : Insect-repellent, N, N-Diethyl-m-toluamide, Anti-bacterial, Azo reactive dye, Sulfonamide
ISSN: 1229-9197 1875-0052
Sayı: 7
Cilt: 15
Sayfa: 1369-1374
25
Scaling up methadone maintenance treatment for opioid-dependent prisoners in Iran
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
International Journal of Drug Policy
Yayıncı:
Elsevier
Yazar(lar) :
Marziyeh Farnia , Bahman Ebrahimi , Ali Shams , Saman Zamani
Yıl :
2010
Ali Shams
Yayıncı Web Sitesi
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Background Research evidence indicates that prisoners in Iran are at risk of drug-related harm, including acquisition of blood-borne infections. In response, several prevention interventions including methadone maintenance treatment (MMT) have been introduced into prisons in Iran. Methods This report reviews and presents some important information extracted from published articles, and available documents on HIV sentinel surveillance and provision of MMT inside correctional settings in Iran. Results Biological surveillance data in 2005 showed that on average about 3% of prisoners in the country tested positive for HIV infection. MTT that constitutes a main component of the Prison Organisation's HIV prevention package is becoming increasingly accessible to opioid-dependent prisoners. Between 2002 and 2008, the number of opioid-dependent prisoners receiving MMT increased steadily from 100 to more than 25000. Conclusion Experiences in Iran suggest that access to MMT would be helpful for reducing illicit drug injection in a prison setting and can be considered as a major intervention for preventing the transmission of blood-borne infections among prisoners.
DOI : 10.1016/j.drugpo.2010.03.008
Anahtar Kelimeler : Prison, Methadone maintenance treatment, HIV, Iran
ISSN: 0955-3959
Sayı: 5
Cilt: 21
Sayfa: 422-424
Sınıflandırma :
26
Comparative study of photocatalytic activities of magnetically separable WO3/TiO2/Fe3O4 nanocomposites and TiO2, WO3/TiO2 and TiO2/Fe3O4 under visible light irradiation
Dergi Makalesi

Dergi Makalesi
Kaynak :
Science Direct
Dergi:
Superlattices and Microstructures
Yayıncı:
Elsevier
Yazar(lar) :
Abdollah Fallah Shojaei , Ali Shams-Nateri , Maryam Ghomashpasand
Yıl :
2015
Ali Shams-Nateri
Yayıncı Web Sitesi
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In this study WO3/TiO2/Fe3O4 nanocomposite particles with different amount of WO3 content (1, 3, 5, 8 and 10 wt.%) were prepared via sol–gel method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) surface areas, diffuse reflectance spectra (DRS) and the vibration sample magnetometry (VSM) were used to characterize the nanocomposites. The photocatalytic activity of the nanoparticles was tested by degrading direct blue 71 dye solution under visible light irradiation. The enhanced photocatalytic activity is attributed to the electron–hole separation and transformation among the semiconductors. The effect of the initial dye concentration, catalyst dosage and the photocatalytic reaction apparent rate constant kapp were also investigated. On the other hand the WO3/TiO2/Fe3O4 nanocomposites could be readily recovered from the reaction solution by using a permanent magnetic bar and their photocatalytic activity was studied after six cycles of repetitive recycling. Then, this nanocomposite can be used as highly efficient and reusable photocatalyst.
DOI : 10.1016/j.spmi.2015.09.014
ISSN: 0749-6036
Cilt: 88
Sayfa: 211-224
Sınıflandırma :
Kimya %72
Kataliz %100
27
Evaluation of Cross-Shore Profile Behavior in Medium-Term Timescales Using XBeach: A Case Study of Zarabad Fishery Harbor, Iran
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
International Journal of Coastal and Offshore Engineering
Yazar(lar) :
Ali Shams Derakhshan , Mahdi Adjami , Seyed Ahmad Neshaei
Yıl :
2019
Ali Shams Derakhshan
Yayıncı Web Sitesi
Kaydet Alıntıla
Among the numerous problems that decrease the capability of a harbor in the country, seasonal sedimentation is identified as a major problem for many fishery harbors. In 2007, Zarabad Fishery Harbor conditions were also identified as critical due to the large volume of sand accumulation and consequent closure of its entrance. Numerical modeling of coastal bed level change was implemented to provide insight into the typical response of the Zarabad beach to regular wave attacks, and to obtain an operational and validated model for the site. Advanced numerical models employed to predict coastal evolution at a variety of time and spatial scales usually include many free parameters that require calibration to the available field data. The XBeach numerical model was selected for its capacity to accurately model hydrodynamic and morphological processes over a two-dimensional domain. It comprises about 250 model settings that approximately 150 of these settings relate to physical and numerical Behavior and the other 100 are case-specific parameters. In this research, 11 parameters are adopted to optimize the model prediction efficiency for Zarabad Fishery Harbor area. For calibration and validation stages, two cross-shore profiles and two medium-term time periods are selected. The model showed great promise in predicting the evolution of cross-shore profiles under water, but as expected, the dry part results showed major errors. XBeach proved to be an operational tool to predict cross-shore profiles in the area, in such timescales. Although, more tests are needed to utilize the model in longer time periods with regard to the duration of simulations.
Anahtar Kelimeler : xbeach model, cross-shore profiles, sand accretion and erosion, beach sedimentation, bed level change
Cilt: 3
Sayı: 2
Sayfa: 47 - 54
Sınıflandırma :
28
Routing over intermittent links for network centric warfare applications
Konferans Bildirileri

Konferans Bildirileri
Kaynak :
IEEE Xplore
Yazar(lar) :
Tariq Ali Shams , Adnan K. Kiani
Konu :
Computing and Processing
Yıl :
2014
Tariq Ali Shams
Yayıncı Web Sitesi
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In this paper, a routing strategy for Network Centric Warfare Applications is proposed. In Network Centric Warfare Applications, a Mobile Adhoc Wireless Network (MANET) is usually required to be setup on the fly between military nodes such as soldiers, armored vehicles, tanks and ships. Due to secrecy requirements, these applications mostly operate in data silence mode keeping the transmitted data as low as possible. In such applications, link stability and reliability take precedence over throughput. Thus in this paper we present a routing algorithm where some of the throughput is traded off for discovering more stable and reliable routes suitable for Network Centric Warfare operations. The proposed algorithm is compared with two of the most popular link stability based MANET protocols. An average 5 % improvement in routing overhead and packet delivery ratio with negligible loss in throughput is observed.
DOI : 10.1109/wcnc.2014.6952675
Anahtar Kelimeler : Routing, Routing protocols, Signal to noise ratio, Throughput, Measurement, Mobile computing, military communication, mobile ad hoc networks, protocols, telecommunication network reliability, telecommunication network routing, intermittent links, network centric warfare applications, mobile adhoc wireless network, military nodes, soldiers, armored vehicles, tanks, ships, MANET protocols, Network Centric Warfare, Mobile Adhoc Networks, cross layer designs
29
Localization of Bose–Einstein Condensation by Disorder
Dergi Makalesi

Dergi Makalesi
Kaynak :
Springer Link
Dergi:
Journal of Low Temperature Physics
Yazar(lar) :
Ali Shams , J. L. DuBois , H. R. Glyde
Konu :
Condensed Matter Physics, General Materials Science, Atomic and Molecular Physics, and Optics
Yıl :
2006
Ali Shams
Yayıncı Web Sitesi
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Recent experiments suggest that Bose–Einstein condensation (BEC) in liquid4 can be localized when the liquid is confined in porous media. We demonstrate in a simple model of hard core bosons using Monte Carlo that the condensate can be separated into two parts. The two regions of condensate are separated by a region of uncondensed fluid that forms in response to a local attractive external potential. The aim is to illustrate that separated condensates, and therefore localized BEC, can be created in porous media.
DOI : 10.1007/s10909-006-9227-3
Anahtar Kelimeler : Boseu2013Einstein condensation, BEC, localization of BEC, Porous media, Superfluidity, Monte-Carlo, Phonon-Roton Excitation
ISSN: 0022-2291 1573-7357
Sayı: 5-6
Cilt: 145
Sayfa: 357-367
30
Factors Associated with the Marketing Behavior (Selling Type) of Olive Farmers in the Tarom Township
Dergi Makalesi

Dergi Makalesi
Open Access
Kaynak :
Directory of Open Access Journals (DOAJ)
Dergi:
Rāhburdhā-yi tusi̒ah-i rūstāyī
Yazar(lar) :
Somayeh Chegini , Ali Shams , ahmad Gheidi , Esmail Karami Dehkordi
Yıl :
2015
Ali Shams
Yayıncı Web Sitesi
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Kaydet Alıntıla
The marketing behavior of olive farmers is different and their behavior is affected by several factors. Because of the strategic importance of olive in the agricultural economics of the Tarom Township, this descriptive - correlational study was aimed to investigate the marketing behavior of olive farmers and the relevant factors effective in the Tarom Township. The statistical population under study consisted of all of the olive farmers in the Tarom Township in 2013 (N=7500) 160 of whom were selected by randomized multi-stage sampling based on Cochran's sampling formula. The research tool was a questionnaire whose validity was verified by a panel of experts in this field and its reliability were obtained by calculating the Cronbach's alpha coefficient greater than 0.7 for composite indices. The results showed that olive farmers market their olive products by three methods named as green, canned and broken and the variables of age, olive price, quantity and quality of production, size of garden, number of participants in extension classes and risk taking status have a significant relationship with marketing behavior of the farmers.
DOI : 10.22048/rdsj.2015.15049
Anahtar Kelimeler : Marketing Behavior, Olive Farmers, Tarom Township, Effective Factor
Cilt: 2
Sayı: 3
Sayfa: 271 - 286
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