Iranian journal of science and technology. transaction a, science Impact Factor & Information

Publisher: Shiraz University

Journal description

Current impact factor: 0.20

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2012 Impact Factor 0.2
2011 Impact Factor 0.029
2008 Impact Factor 0.059
2007 Impact Factor 0.011
2006 Impact Factor 0.041

Impact factor over time

Impact factor
Year

Additional details

5-year impact 0.18
Cited half-life 0.00
Immediacy index 0.00
Eigenfactor 0.00
Article influence 0.07
ISSN 1028-6276
OCLC 405751656
Document type Journal / Magazine / Newspaper

Publisher details

Shiraz University

  • Pre-print
    • Author cannot archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Publisher's version/PDF may be used
    • Applies to Molecular Biology Research Communications
    • Publisher last contacted on 05/10/2012
  • Classification
    ​ blue

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, a new model based on kinetic theory of gases and longitude oscillations of metallic nanocluster on single carbon nanotube (CNT) in addition to phononvibrations of CNT on substrate is presented to describe the growth mechanism of ultra-long CNT in chemical vapor deposition (CVD).Interaction between CNT and catalyst is investigated by Lennard-Jones potential. Simulations demonstrate that metal nanocluster makes and keeps the carbon atoms at tip end reactive. So carbon nanotube can grow more than 1 cm. In addition, results show carbon nanotubes with larger diameter grow less owing to higher damping factors. Furthermore, effect of temperatureand type of catalyst on growth is discussed and it is shown thatthere is an optimum temperature and an optimum catalyst for growth process. Also, it is shown that the optimum temperature is changed by using different catalysts. Finally, effect of the partial pressure of decomposed hydrocarbons on the growth is also discussed. It is demonstrated that increasing partial pressure leads to the longest CNTs and influence of partial pressure on CNTs with smaller diameter is stronger. All results from the model are in good agreement with reported experimental results.
    Iranian journal of science and technology. transaction a, science 03/2015; 39(A1):1-6.
  • Iranian journal of science and technology. transaction a, science 02/2015;
  • Iranian journal of science and technology. transaction a, science 01/2015;
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this article, we have analysed the Bianchi type-V domain walls and quark matter cosmological model with Cosmological constant L in f (R, T) theory of gravity with the choice of f (R, T) = R + 2 f (T). Some physical and kinematical behaviour of the models are also discussed.
    Iranian journal of science and technology. transaction a, science 01/2015;
  • Iranian journal of science and technology. transaction a, science 01/2015;
  • Iranian journal of science and technology. transaction a, science 12/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: An efficient and chemoselective procedure for the preparation of 1,1-diacatates (acylals) from various aldehydes with acetic anhydride in the presence of Brønsted acidic ionic liquid [Msei]Cl as a reusable catalytic system under solvent-free condition at room temperature and short periods of times with excellent yields will be described. The catalyst was easily separated in simple work-up and was recycled several times without loss of reactivity under the described reaction conditions.
    Iranian journal of science and technology. transaction a, science 10/2014;
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    ABSTRACT: An efficient method for the Friedel–Crafts acylation of a wide range of aromatic compounds in good to excellent yields under solvent-free conditions, using iron zirconium phosphate (ZPFe) was investigated. The catalyst is easy to prepare and shows interesting catalytic properties. The catalyst was characterized by some instrumental techniques such as XRD, ICP-OES, SEM and TEM. A wide variety of benzene derivatives reacted easily with benzoyl chloride and some of its derivatives to afford the corresponding aromatic ketones in clean and good yields with the para isomer predominating typically using 3mol% of catalyst. The use of inexpensive materials, simple and clean work-up, short reaction times in most cases and good yields are the main advantages of this method. This work introduces a new application of this catalyst, not described in the literature until now. Also, the catalyst can be recovered and reused for three times without a significant loss in its activity and selectivity.
    Iranian journal of science and technology. transaction a, science 10/2014; 38:463-471.
  • Iranian journal of science and technology. transaction a, science 10/2014;
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    ABSTRACT: In this paper, the meshless local Petrov-Galerkin (MLPG) method is used to analyze the dynamic fracture of an isotropic FGM plate containing a center crack. The dynamic stress intensity factors are studied under the influence of various non-homogeneity ratios. Both the moving least square (MLS) and the direct method have been applied to estimate the shape function and to impose the essential boundary conditions. The enriched weight function method is used to simulate the displacement and stress field around the crack tip. Normalized dynamic stress intensity factors (NDSIF) are calculated using the path independent integral, J*, which is formulated for the nonhomogeneous material. To validate the method, the homogenous center cracked plate problem is analyzed. The obtained results show good agreement between the analytical solution and the MLPG results for homogenous material. After validation, a center cracked plate made of FGM with two different material gradations (along and normal to the crack length) and three different lengths of FGM zone under the effect of step load are considered, and the following six distinct problems are studied here.
    Iranian journal of science and technology. transaction a, science 04/2014; 2014(38M1+):181-194.
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    ABSTRACT: Sluice and radial radial gates are common devices used for flow control in hydraulic structures. This paper demonstrates the variation of the contraction coefficient of sluice gates and three types of radial gates (namely, Hard-Rubber, Sharp and Music Note gates) by using Energy and Momentum Equations (EMEs). This paper presents a novel method for estimating the acting force behind these gates under free and submerged flow conditions. A minimum value of the contraction coefficient for sluice gates was obtained under a certain value of relative gate opening. Under a specific condition, Hard-Rubber gates have a larger contraction than Sharp gates, while Music Note gates have the least contraction. It is recognized that the contraction coefficient decreases as the gate lip angle and the gate opening increase. Under submerged flow conditions, the contraction coefficient of sluice and radial gates would be either increased or decreased depending on the level of flow submergence. It is concluded that using the proposed contraction coefficient in estimating the discharge coefficient demonstrates an acceptable accuracy.
    Iranian journal of science and technology. transaction a, science 01/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The purpose of this paper is to investigate the inverse problem for a second order differential equation the so-called differential pencil on the finite interval 􁈾0,1􁈿 when the solutions are not smooth. We establish properties of the spectral characteristics, derive the Weyl function and prove the uniqueness theorem for this inverse problem.
    Iranian journal of science and technology. transaction a, science 01/2014; 38(A3):305-309.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Concentrations of elements (As, Co, Cu, Ni, Mo, Pb, V, Cd, Cr and Zn) are studied in the surface sediments of Bakhtegan Lake, northwest of Nyriz City, Iran, to assess metal contamination. The average abundance order of trace elements content in Bakhtegan Lake sediments is Cr>Ni> V> Zn> Cu> Co> As> Pb> Mo>Cd. The comparison of trace elements concentration in Bakhtegan Lake sediments with toxicological reference values, reveal that the average concentration of As, Cr and Ni in the present sediments is higher than threshold effective level (TEL). Ni shows higher concentration than toxic effect threshold (TET) and probable effective level (PEL) values. The results of contamination factor (CF) based on background value reveal that Cr, Cu, Zn, V, Co, Pb, Mo, As and Ni have moderate and Cd has considerable contamination factor. The application of modified degree of contamination values (mC d ) based on background and mean shale values indicate low and very low degree of contamination in sediment samples, respectively. The calculated EF values indicate that Cd in Bakhtegan Lake sediments is enriched compared to the background value. The strong association of Cr, Ni, Zn, Co, Cu, Pb, and V in sediments and high loading of these trace elements with clay, Mn and Fe (PC1) agree with the measured correlation coefficients indicating that Mn and Fe hydroxides and clay content play a significant role in the distribution and sorption of trace elements in sediments. The results of PCA for As and Cd indicate that these elements are influenced by anthropogenic activities. Keywords: Sediment; contamination; Factor analysis; toxicological reference; Bakhtegan Lake; Iran
    Iranian journal of science and technology. transaction a, science 01/2014;