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Showing 12 results for Haghparast


Volume 3, Issue 2 (, (Articles in Persian) 2012)
Abstract

The main aim of this research is finding the similarities and differences between the representations of social actors in the two different versions of Bahman’s vengeance seeking. Accordingly, the author tried to find the ideological background behind the two texts and show the difference in impression by studying socio-semantic elements that Theo Van Leeuwen offered in his suggested pattern and comparing them with the corresponding parts in Shahnama and Bahmannama. The results showed that some branches of the two main methods are exclusion, and inclusion is to some extent visible in both texts. Also association, dissociation, nomination and categorization along with their subsets are the techniques used to represent the social actors. Analysis of the two texts clearly shows that Bahman in Shahnama is seeking legitimacy for his goal while he has the authority and individuality in Bahmannama while he does not need to use persuasive and approval seeking techniques; so representations of social actors in Shahnama are more than in Bahmannama and they were used deliberately.

Volume 4, Issue 10 (12-2016)
Abstract

So far several models have been proposed in order to systematically classify hero`s replicable life in heroic narratives around the world. These models, except for some few cases of difference, are very similar to each other. After the introduction and criticism of Hero patterns available, this study compares and contrasts the most famous and comprehensive ones as examples for Rustam`s life events. It shows that many parts of these patterns do not match with the most prominent representative of the idea of "world champion" and beyond that with the life structure of heroes Sam`s Clan and it is needed to design a native pattern to classify overall life structure of Iranian heroes. Therefore, the authors have determined the life structure of five first Iranian champions i.e. Garshasp, Nariman, Sam, Zal and Rustam and have shown their replicable parts. Accordingly, they have suggested a new pattern of Iranian heroes' life that consists of five distinct sections of characteristics of hero`s parents, amazing properties of the hero from birth and childhood, departure for battle, love and marriage, and finally guilt and death.

Volume 6, Issue 1 (6-2017)
Abstract

Growth, sex ratio and age of 188 specimens of Tench, Tinca tinca, from Anzali wetland were recorded during Nov. 2013 to June 2014. The age range of fish was 0+ to 6+ years. Male to female sex ratio was 1:1.7 that differed significantly (P<0.05). Maximum total length (TL) and weight (W) was 40.7 cm and 1000g, respectively. The b value of the length-weight relationship was 2.70 that showed negative allometric growth (p<0.05). The growth performance index (ϕ) was calculated as 2.61. The estimated von Bertalanffy growth parameters were (L= 47.48 cm, k= 0.18 yr- and t0= -1.07 yr). Tmaxwas calculated 16.41 years. Also infinity weight (W) was estimated as 1261.43 g. The present investigation provides basic information about population structure of Tench (T. tinca) in Anzali wetland.

Volume 6, Issue 3 (11-2016)
Abstract

Horizontal development of the cities has resulted in much destruction environmentally and economically. Two of the major consequences of such destruction is imbalanced development and inappropriate application of lands in the cities that are referred brownfield in this article. Brownfield in the urban planning jargon, a brownfield site (or simply a brownfield), is a type of land formerly used for industrial purposes or some commercial applications. The brownfield concept was first introduced by the British government and was used in accordance with the sustainable development policies which is mostly focused on the environmentally polluted lands. In the last two decades, redevelopment policies of brownfield as a crucial practical solution for preventing disperse growth of cities and also supporting the concentrated growth of cities have been attracted more attention. The main features of the brownfields are: -1 Pollution: each land in which an environmental complication has the occurrence probability. -2 Empty and leaved without using and in general lands and properties that their activities have been closed or not been used anymore. Of course, some of the terms that must be separated from the brownfield areas are: greenfields and grayfields.
Greenfields are those lands that previously has not been developed and often are rural or suburban. These green sites are located in the edge of small or large cities and have better accessibility and more palatability with additional space for future development.
The term grayfield, was defined in 1998 by new urbanism congress. Unlike the famous terms of greenfields (the rural undeveloped) and brownfields (polluted urban sites), the gray lands are called to the large undeveloped sites that have good reasons for redevelopment. The term of grayfield can be used to describe any kind of redevelopment that significantly is not polluted. But regarding the importance of environmental protection and sustainable development and realization their policies, it is essential to eliminate or reduce the environmental pollutions purposefully to achieve the redevelopment of brownfields.
For the sake of importance and novelty of the subject, redevelopment of Brownfield with the objective of efficient applications of lands in cities and reducing the environmental pollution and also improving the social-economical context of these fields is the subject of this article. Brownfield of Kan stream in Tehran was selected as the case study. The field was selected as it is one of the few major barren Brownfield in Tehran. They are not only in the leaved brownfields but also regarding the river-valley nature, the fields has specific ecological and tourism features. Unfortunately, due to lack of planning and management, these brownfields have been converted to the locations of rubbish depot and uncontrolled polluted waters and therefore infected with the environmental pollution. The methodology of this article is descriptiveanalytical using library studies. After studying the theoretical framework, defining features of brownfield, literature review, objectives and the importance and of these fields, the redevelopment process of Kan stream Brownfield are presented. Finally, the conclusion and analysis of the actions are conducted in redevelopment of brownfield with social, economical and tourism approach.
After comprehensive studies, in order to determine the kind of landuses in Kan brownfields, establishing a national and even an international performance scale park is designated as the planning vision. In this context, the objectives of the redevelopment planning process Kan brownfield included:
creating a touristic space to enhance the region›s tourism identity, planning with emphasis on providing recreational services for all social classes, such as children, elderly people and women and people with disabilities (all divisions with regard to sex, age and physical aspects), strengthening of the relationship between people and nature and to replacing normal social activities and improvement environmental conditions; Developing ecotourism in urban environment regarding and it s benefits beyond natural landscapes, enhancing green space for per capita in Tehran city and attainment to the standard limits for
environment qualities by using marginal lands and rivers sanctums.steel plates. In addition these bars are pre- tensioned by means of cable passing through them in order to behave properly to the applied forces.
The way that the bars are moved through the retraction process and the function of the building effects on the selection of the covering materials. In this structure, as the distance between the bars is changed during the deployment process it is required to use a flexible but strong material that can resist repeated retraction. Therefore, a flexible membrane that is strong enough during movement and has a proper foldability such as ETFE is one of the best alternatives for covering the roof. ETFE is also able to penetrate enough light inside of the building when the roof is in fully closed position and this in turn reduce the energy required for running the building.
The membrane is also attached to the bars though the slots that have already been created during fabrication and is fasted by means of pinned curve plate. This is also worth to mention that in this structure, the placement of the moveable components underneath the covering material support the whole structure even in severe weather conditions. Therefore, this increase the life cycle of the system and decrease the maintenance cost.
In summary, this paper proposes a new solution for a retractable curved roof system that can not only be transformed from an open to closed configuration but is also able to support itself structurally even during movement and transformation. In other word, the structural and transformable components are integrated and are able to make the whole structure stable during transformation.

Volume 13, Issue 1 (Number 1 - 2011)
Abstract

Effects of sodium salt solutions on physicochemical and sensory characteristics of refrigerated Persian sturgeon (Acipenser persicus) fillets during 12 days of storage were investigated. Fillets were dipped in solutions (2.5% w/v) of sodium acetate (SA), sodium lactate (SL), sodium citrate (SC) and distilled water (as control) for 10 minutes and then packaged. An assessment of TBARS, FFA, pH, heme iron and sensory attributes (flavor, color and odor) was carried out on 0,3,6,9 and 12 days past the storage time. Results indicated that TBARS values of each sample increased with the storage time (P< 0.05). Control showed the highest values of TBARS while sodium acetate sample had the significantly (P< 0.05) lowest figures among the treatments (1.04 for SA versus 2.34 for control). Lipid hydrolysis assessment revealed that the sodium salt treated samples, especially sodium acetate, acquired the lower FFA amounts (P< 0.05) as compared with control. No significant differences (P> 0.05) were observed among the pH values of the treatments. Heme iron assessment showed that the samples treated with sodium acetate contained more heme iron as compared with control. Sensory assessment revealed more desirable scores for the sodium acetate treated group as compared with others samples. The order for the sodium salt treated effects was: SA> SC> SL. As a consequence, sodium salts, in particular sodium acetate, might be considered as effective tools in preventing the quality degradation of the fillets, resulting in an extension of their shelf life.

Volume 13, Issue 1 (Winter 2025)
Abstract

Background: Due to high toxicity, durability in natural conditions, and bioaccumulation in the food chain, potentially toxic elements are considered serious pollutants.
Material and Method: toxic elements (Al, As, Cr, Cd, Co, Cu, Ni, Pb, Zn, V, and Mn) in sediment samples from some coastal rivers flowing into the southern Caspian Sea (Tajan, Babolroud, and Shirood) were assessed. Single (Cf , EF, Igeo, Hq, PLI, and QoC) and integrated contamination indices (m-PEC-q, m-PEL-q, MERMQ, NPI, and CSI) were used to assess the ecotoxicological risk of the metals.
Results: At all sites, the level of Cd was less than the detection limit (<5 mg.kg-1), indicating no significant source of pollution containing Cd. The mean concentration order of the metals in the rivers varied, suggesting that their contaminant sources significantly differed. The metal content of the Tajan River was substantially lower than that of the other rivers. EF values of Cu, Ni, and As showed partial enrichment, probably indicating their anthropogenic origin. According to the single indices of CF, Igeo, PLI, and Hq, the Babolrood and Shirood Rivers, sediment was significantly contaminated by As, Ni, and Zn. Based on NPI values, the Shirood River was extremely polluted by As. Integrated ecotoxicological risk indices of CSI, m-ERM-Q, and m-PEL-q suggest that metals pose medium to low levels of environmental toxicity in the Babolrood and Shirood Rivers.
Discussion and Conclusion: This research demonstrated the necessity of using management and pollution control strategies such as improving wastewater treatment, promoting sustainable agriculture, and regulating industrial discharges.


Volume 13, Issue 6 (Number 6 - 2011)
Abstract

This study was carried out to evaluate the effects of red onion (Allium cepa L.) juice and green tea (Camellia sinenses) extract on lipid oxidation and sensory characteristics of refrigerated (4ºC) sturgeon fillets (Acipenser persicus). Fresh fillets were tumbled in 1%, 2.5%, and 5% (v/v) aqueous solutions of onion Juice (OJ) and tea extract (TE), and then stored for up to 8 days at 4°C in a refrigerator. Chemical indices of lipid oxidation as assayed by heme iron, thiobarbituric acid and free fatty acid contents indicated much more reduction in 2.5%TE, 5%TE and 5%OJ-treated samples relative to the other samples (P<0.05). Significant (P<0.05) differences in pH values of treatments and the control were observed during the first 2 days of storage time. For 5%OJ treatment, the pH remained constant during refrigerated storage (P>0.05) whereas gradual changes were detected in pH values of the others. Generally, the order of effectiveness for inhibiting oxidation in sturgeon fillets was found to be: 5% TE or OJ = 2.5% TE > 2.5 % OJ>1% TE = 1% OJ. Based on sensory scores, higher amounts of onion juice (>1%) were more effective to improve attributive characteristics of the fillets.

Volume 14, Issue 4 (7-2012)
Abstract

Considering the crucial importance of Daphnia species in aquaculture, in particular for artificially- cultured sturgeon fry, a comprehensive study on the hatching requirements of their diapausing eggs seemed to be inevitable in order to obtain the ideal hatching technique. To do so, the ephippial eggs were collected from live food ponds in the cultivation and breeding centre of Gorgan and after isolation, were kept in dry and wet conditions at 4°C for 2 months in darkness. Following the pre-incubation period, the ephippia in each group were subdivided into two parts each treated with NaOCl 1% and distilled water. The effect of temperature levels (20, 25, and 30˚C) and photoperiod levels (12L: 12D, 24L: 0D) on hatching percent and the rate of egg hatching were investigated in artificial daphnia medium (AdaM) for 15 days. Results indicated that wet pre-treatment of Daphnia magna diapausing eggs with 1% NaOCl solution and subsequently exposure to continuous illumination at 20 and 25˚C was effective to reach the maximum number of hatchlings and the maximum egg hatching rate (P< 0.05). Exposure of the wet diapausing eggs of Daphnia pulex to 12 hours illumination and 25ºC without soaking in NaOCl 1% maximized the number of hatchlings and the rate of egg hatching (P< 0.05).

Volume 15, Issue 1 (1-2013)
Abstract

The aim of the present study was to compare three reducing sugars (D-glucose, D-arabinose, D-mannose) with respect to the antioxidative activity characteristics of their Caramelisation Products (CPs) prepared by monitoring UV-absorbance, browning intensity, ferric ion reducing capacity, Fe2+ ion chelating activity as well as DPPH radical scavenging activity. Moreover, the effect of CPs from D-glucose on prevention of lipid oxidation and improvement of sensory characteristics were examined in Indian shrimp flesh (Penaeus indicus) during its frozen storage for a duration of 6 months. The reducing sugars were heated at 100°C at pH 10 for 100 minutes to generate CPs. Results revealed greater antioxidant activity of the hexoses, D-glucose and D-mannose, than that of the pentose sugar, D-arabinose, as evidenced by the higher UV-absorbance, browning development, reducing power, chelating as well as DPPH radical scavenging activity. Results of the chemical analysis including TBARs and FFA proved that the addition of CPs from glucose (G-CPs) could retard the formation of compounds produced over lipid oxidation in G-CPs-added shrimps (P< 0.05). More desirability in sensory attributes of the shrimps treated with G-CPs was expressed than in the untreated samples during the 6 months of storage. These results reflect that G-CPs can be utilized as additives in seafood with appropriate antioxidative and techno-functional properties.
Aminreza Noghrehabadi, Amir Haghparast,
Volume 16, Issue 11 (1-2017)
Abstract

In this paper, the modified couple stress theory is used to study static and dynamic pull-in instability of a general model of a nano-cantilever under a sudden applied DC voltage in the presence of the surface effects. A partial part of the nano-cantilever is subject to the electrostatic and capillary forces. Euler-Bernoulli theory is used to model the beam and the equation of motion is derived by using Hamilton’s principle. The governing equations are transformed into a non-dimensional form and then solved using finite element method (FEM). The results, obtained using FEM are compared with the data available in the literature and found in good agreement. Basic parameters for engineering design at the nanoscale, such as deflection and pull-in voltage have been calculated for both of the dynamic and static modes. The results of dynamic analysis of the beam show that as the voltage increases, the beam goes into an oscillating mode with large amplitudes just before pull-in phenomenon occurs and the beam collapses into the substrate (fixed electrode). Moreover, it is found that a decrease in the length of the fixed electrode (increase of the partially affecting parameter), and the increase of the fringing field effect, the size effect and the surface effect increases the pull-in voltage of the nano-cantilever beam.

Volume 19, Issue 6 (11-2017)
Abstract

Tests were done to determine high-yielding and stable durum wheat genotypes. An experiment was set up as a RCBD (Randomized Complete Block Design) with three replications on 17 advanced durum wheat genotypes under rainfed and supplementary irrigation conditions in the cropping seasons of 2011-13. Combined analysis of variance indicated that environment main effect accounted for 70.09% of total yield variation; and effects of genotype and Genotype×Environment Interaction (GEI) accounted for 2.95 and 10.71%, respectively. Results indicated remarkable difference in genotypes response across environments. G×E interaction was analyzed following Additive Main effects and Multiplicative Interaction (AMMI) model. The first two interaction Principal Component Axes (IPCA1 and IPCA2) explained 53.75 and 36.99% of total interaction effects, respectively. Based on the AMMI model, AMMI Stability Value (ASV) and Genotype Selection Index (GSI), genotypes G11, G8, and G14 were selected for all environments. According to the AMMI2 biplot, the G15, G16 and G17 exhibited specific adaptation with rainfed (E1) and irrigation (E2) environments. G3 and G4 displayed specific adaptation with rainfed (E3) environment and G10, G9, G1, and G12 indicated specific adaptability with irrigation (E4) environment. The E3 had high discrimination ability, so, this environment was considered sufficient for making genotypes recommendation. Results of this investigation illustrate that the AMMI stability parameters are suitable for characterizing stable genotypes and that the GSI parameter can detect genotypes with high grain yield and good stability for plant breeding research in durum wheat.

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