Showing 5 results for Nasirian
Volume 3, Issue 2 (Spring 2023)
Abstract
An example of Rorty's confrontation with the analytical philosophy is his opposition to Davidson's attempt to propose a semantic theory based on truth. According to an anti-metaphysical approach to Truth, Rorty believes that the use of the phrase "p is true" is simply to confirm a claim that we consider ourselves or others justified in making. Although Davidson is against the metaphysical approach to truth, based on a Tarskian truth definition, he believes that a notion of truth more robust than Rorty will admit is required to propose a theory about meaning. Rorty's Wittgensteinian response to Davidson is that not only the conversation between the speaker and the interpreter is not conditional on knowing a theory of meaning based on truth, but the attempt to say something more than what we can say about truth leads us to the confusions of the metaphysical tradition. This article, referring to Davidson's writings, shows that Davidson's effort to propose a semantic theory based on truth inevitably leads him to express metaphysical interpretations.
Roya Nasirian, Bahram Naseri, Jabraeil Razmjou,
Volume 3, Issue 3 (9-2014)
Abstract
The eggs and larvae of the Indian meal moth, Plodia interpunctella (Hübner), are widely used in mass rearing of parasitoids and predators. Feeding indices and some biological parameters of P. interpunctella were studied on bran of different wheat cultivars ('Back-cross Roshan', 'Khooshe Pishgam', 'Khoshki line 9', 'Arg', 'Alvand', 'Pishtaz', 'WS-89-2', 'Sepahan' and 'Bam') when incorporated into artificial diets under laboratory conditions (25 ± 1 ºC, 65 ± 5% R.H., and a 16:8 h light-dark photoperiod). The efficiency of conversion of ingested food was highest on 'Back-cross Roshan' (98.79 ± 8.48%) and lowest on 'Pishtaz' (64.56 ± 9.66%). The highest and lowest percentage of mortality of P. interpunctella larvae were on 'Pishtaz' (56%) and 'Back cross Roshan' (12%). Our results showed that larval growth index was highest on 'Khoshki line 9' (5.81) and lowest on 'Pishtaz' (3.33). Moreover, the highest daily and total fecundity were detected in moths that were reared on 'Back-cross Roshan' (37.6 ± 0.93 and 177.3 ± 1.61 eggs, respectively). The results demonstrated that, among different wheat cultivars tested, 'Back-cross Roshan' was the most suitable cultivar for P. interpunctella rearing in order to optimize the mass production of natural enemies.
Volume 4, Issue 2 (spring 2022 2022)
Abstract
The issue of management and planning for urban fringe in different countries always experience different approaches, attitudes that are generally in the form of protection or development of urban fringe and surroundings areas, because it depends on political, economic and institutional developments over time. For this reason, there is no uniform and formal definition of urban fringe among different countries. Over the past five decades, city of Tehran has adopted different policies in the plans and provided projects which were different in the preparation and implementation. In the present study, five decades of planning for the Urban Fringe of Tehran are investigated and analyzed, and these programs have been studied and analyzed from two dimensions of policy and quality. The paper is applied and is based on a non-intrusive interpretive approach. The information gathering tools are library studies and use of various sources and texts. The study's findings for policy analysis identified five categories (management, planning, organization, conservation, development) and for analyzing the quality of the seven categories (program presentation, effect of reality, popular participation, infrastructure capacity, land status, implementation and adaptability). The results of the analysis of the programs show that in the developed programs the main approach and policy is based on the protection of Urban Fringe, which in order to achieve it should improve the integrity (due to the way of implementation) and legitimacy (due to lack of public participation) of the programs.
Volume 14, Issue 2 (8-2014)
Abstract
The frequency bandwidth of microstrip patch antennas can be increased using both of U-slot and proximity feeding. Although some design rules have been already explained for the probe-fed U-slot antenna the proximity coupling causes to consider a lot of parameters for design procedure; consequently, to deal with all of them seems confusing. In this paper after investigating the effect of various parameters on the multiple resonant frequencies of the antenna and recognizing the most effective factors, some guidelines to design a proximity coupled U-slot microstrip antenna are proposed. In addition, an antenna element with 16% impedance bandwidth is designed at center frequency of 16.7GHz, and its broadband impedance and radiation characteristics are vastly considered. Also, 1×2 and 2×2 arrays of the antenna element are designed to use as subarrays for designing large arrays. The measurement results of return loss and radiation pattern, show good agreement with simulation results.
Volume 19, Issue 122 (April 2022)
Abstract
In this study, the graphene oxide was used as adsorbent for the separation (adsorption and desorption) of flavonoids from lemon peel. Properties of desorption extract (total phenolic content, total flavonoid content, scavenging ability of DPPH free radicals) were determined. Antioxidant activity of desorption extract at three levels of 250, 500 and 1000 ppm and BHT synthetic antioxidant at 200 ppm in antioxidant-free frying oil were evaluated by measuring peroxide value, thiobarbituric acid test, conjugated DN and color index. Each gram of lemon peel extract contained 19767.20 μg phenolic compounds and 33.552 μg flavonoids on dry matter. Each gram of desorption extract contained 5861.56 μg phenolic compounds and 3.446 μg flavonoids on dry matter. Peroxide value, thiobarbituric acid,
conjugated DN and color index of oil increased with increasing heating time and the highest increase was observed in the control treatment without antioxidants. Treatments containing desorption extract at 500 and 1000 ppm, can compete with BHT antioxidant. The results of this study indicated that desorption extract can be used as a replacement for synthetic antioxidants in oil.
