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Showing 3 results for Malekpour

Touraj Malekpour, Ali Keshavarz Valian, Masoud Zia Bashar Hagh, Bagher Soleimani,
Volume 15, Issue 10 (1-2016)
Abstract

In recent years, many researches have investigated nanofluids pool boiling and reported some contradictory results. In this study, the pool boiling heat transfer of water- alumina and TiO2-water nanofluids at saturated temperature was investigated experimentally. The experiments were conducted to investigate the impact of concentration and type of nanofluid on the pool boiling heat transfer of brass surface. Water- alumina and TiO2-water nanofluids with volumetric concentration of 0.0025-1% and 0.0025, 0.01, 0.25 % was used, respectively. An experimental setup with a cylindrical heated test section made of brass and surface roughness of 0.2µm was designed and fabricated. The experimental results showed that, the heat transfer decreases as the nanoparticles added into the pure water base fluid. At a constant heat flux, the heat transfer coefficient decreases as the alumina volumetric concentration increments from 0.0025 to 0.01% and then increases for further addition from 0.01 to 1%. The TiO2-water nanofluids performance with respect to the water-alumina nanofluids was not very promising. That means, the boiling heat transfer decreases while the boiling surface temperature increase at a constant heat flux.

Volume 17, Issue 102 (August 2020)
Abstract

Pomegranate peel, a waste generated from fruit processing industry, is known as a potential source of bioactive ingredients such as polyphenols, minerals and fibers. In this study, the chemical composition and functional properties of pomegranate peel powder (PPP) were determined and it was applied as a substitute of wheat flour in formulation of sponge cake at five levels of 1.5, 3, 4.5, 6 and 7.5% and two particle sizes of 210 and 500 microns. Then, the physical properties of the batter and the chemical, physical and sensory properties of the resulting sponge cake were examined. The chemical analysis of PPP showed that this powder was high in fiber, minerals especially potassium and calcium, and phenols. By increasing the PPP level and decreasing its particle size, batter consistency and density, as well as cake specific volume and symmetry index were significantly increased, while the porosity of the cake decreased. The chemical analysis of the cakes also showed a significant increase in the moisture content, ash, total fiber, and the decreasing trend of the protein, carbohydrate and energy content by increasing the percentage of PPP. In addition, samples containing higher levels of PPP had a lower L * index and higher a * and b * indices and were, therefore, darker, more reddish and yellowish. According to texture analysis, cakes with a higher percentage of PPP had more hardness and gumminess, and less cohesiveness. Based on the sensory analysis, the closest sample to the control was a cake containing 1.5% PPP with a particle size of 500 microns. Overall, it can be concluded that replacing less than 4.5% PPP can produce a cake with good quality properties and higher nutritional value.

Volume 22, Issue 3 (Fall 2018)
Abstract

Abstract:
 
The twentieth century obsession with communication, as Habermass described it, has been affected planning theory and practice. Communicative action as a new approach in planning theories in pursuit of critique of positivism dominance and quantitative approaches in planning in the last of 1970s and through this view that procedural planning theory should be oriented to social welfare goals, considered as a progress in procedural planning theory. Nonetheless, procedural planning theory also for sake of ignoring power relations and its mechanism in society from planning researchers has been criticized as a tool for facilitating the neoliberal ideology. Critics believe that the public in this kind of planning has been become to private sector partners for reproduction of capital and the real people- no part morass in society- excluded from this kind planning. The goal of this paper is to discover the unknown areas of collaborative planning with application of the beginning of politics concept as new formulation of real politics and approach for rediscovery of people.
Exploring of casual relationship of research subject-collaborative planning and the application of the beginning concept for critiquing it- constitute the basic framework of paper and this matter shows explanatory nature of this paper. Also exploring unknown areas of collaborative planning represent the explorative essence. Independence of politics from government construct contingency characteristic of politics and social field. This fact results in reference to people politics energy which has not been revealed and this energy has solved in intra power groups and capital owners and prevents immanent movement.
This article calls for a return to Lacanian perspective in contemporary communicative planning theory and analysis, but rather than traditional critique, it argues for a critique predicated on the psychoanalysis of Lacan and “The real concept. It signals right from that an intention to tamper with the familiar interpretation of planning theories to shake up current flow of theorization to allow other, more radical thoughts to be emerge. According to this approach, planners and policy-makers should be involved with conflicts and agonism more than consensus building.
At that point in history, planning theory was dominated by systems that upheld rational approaches which gave planning processes priority over the possible results. Some like Mouffe and Laclau were among the chief detractors and critics of this approach who saw it as rooted in an apolitical basis. Lacan provides an explanation for this challenge based on his theorizing about human subjectivity— how we acquire the identifications that constitute ourselves as planners. The article will deploy Lacan’s explanatory power for understanding how the professional identities of planners and the central ideas constituting the planning discipline are interrelated. Particularly, Lacan’s theoretical model of the four discourses will be used to explore planning education and how aspiring planners acquire and internalize the discipline’s often-diffuse sets of traditions, beliefs, knowledges, and values.
In this article, I will trace a reconfigurative path through the Lacan’s psychoanalytic theory, picking out the hidden narrative that has instigated the contemporary reassertion of antagonism and conflict in planning. My intent is not to erase the historical discussion about consensus in planning decision making process but to open up and recompose the territory of the communicative planning through a critical reference to antagonism in planning.  As will be evident in this article, this reference and reassertion of conflict in planning theory and practice is an exercise in both deconstruction and reconstitution through Lacan and Mouffe viewpoints. It cannot be accomplished simply by appending spatial highlights to inherited planning theories perspectives and sitting back to watch them with logical convictions.
The article argues that a Lacanian inspired phronetic model is particularly useful for understanding spatial planning and related urban policy discourses, for it provides insight as to how desire and resultant ideological fantasies shape our shared social reality and spaces of habitation in our globalized world. Why is it so difficult to define concisely the meaning of ‘planning’ and many of its dominant concepts—public interest, new urbanism, sustainability or smart growth—when deployed in formulating urban policy? Lacan’s discourse theory suggests an answer based on an understanding of our human subjectivity, a subjectivity that implicitly seeks to overlook contradiction and ambiguity in our desire to fulfill human aspirations for a harmonious and secure world. This article will use Lacanian theory to examine the beliefs of the planning profession, how they are shaped and then implemented in our urban environments.
This article, maps out a new political approach in planning theory and practice that is deeply rooted in the real concept of Lacan and the political concept of Mouffe that applies equally well to critical planning theory and to decision making process. The fist fruit of this approach – and the first lessons of planning theory that embodies it – is the idea that planners can understand planning environment uncertainty, complexity and conflicts only by locating himself within antagonistic environment. This approach enables us to grasp real practice and theory and the relations of stakeholders in planning and decision-making process. I draw upon Lacan’s depiction of what is essentially a real imagination in planning to illustrate the logic of antagonism that help realization of planning decision making process.
 

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