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Showing 72 results for Mazaheri
Volume 2, Issue 1 (Issue 1 (Tome 2)- 2012)
Abstract
City is like a living entity, which regenerates constantly by constructing new buildings. With few exceptions, the character of cities have changed over time with the architectural styles fashionable in each period as well as the changing demands for their functionality. Most often, the character is a combination of styles and it is important that this evolution is maintained and the vitality of places can be extended. In fact, city is the result of different historical periods and includes historical loads of various periods; and, contemporary eras are in this process, too. Our constructions will form some parts of the city in future and will cause a layer in this inherited complex, and will make specification and identity of cities and will be an inheritance for posterity. Although preservation is considered as a major step in revitalization of historic sites and buildings, ironically these sites benefit from being extended. In fact opposing construction of new structures on these sites could mean taking away the liveliness of the city and the long term standing of these sites as a historical place. In contrary, expansion and construction of new buildings on these sites maintains the history of the site to the new era and enrich its history. New architectural styles and materials are often introduced into the city initially on the periphery and then in empty plots or as replacements for dilapidated buildings. Sometimes, existing buildings are adapted to the new styles. New architecture in an existing setting will set out to copy, mimic, integrate, harmonize with, contrast, juxtapose on or even compete with the existing context. Each situation may necessitate a different approach. However, construction of these new structures on a historic context is a very delicate task which requires well-planned regulations as these new structures link the contemporary architecture to the values and characteristics of the site. Over the past few centuries a great afford has been carried out, thorough the world and particularity within the central Europe, for design of such regulations and legislations for revitalization and conservation of these sites. This has left a legacy of resolutions, recommendations and charters in this field around the world that are result of experience gained from a variety of approaches in this field in different countries. In order to achieve a design guideline for new constructions in historic context, the purpose of this paper is review of ideas and theories, agreements and charters associated with the presence of new constructions in historic context. In this paper, we will review the theory of theorists that had more impact on the approaches. We will then look at the details of the agreements between the international bodies that directly or indirectly influenced these regulations and had key roles in their design. At the end, we will set a table which will be based on the approach of any of the agreements, and the evolution of this approach is discussed in international scale.
Volume 2, Issue 4 (12-2013)
Abstract
Fusarium graminearum is one of the most important causes of FHB or wheat scab in different part of the world. This fungus is able to produce widespread Trichothecene mycotoxins such as Nivalenol (NIV) and Deoxynivalenol (DON) which are harmful for both human and animals. To determine chemotypes of Trichothecene, a total of 100 isolates from different fields of Golestan province in Iran including Gorgan, Kordkuy, Bandaregaz, Gonbad, Minodasht, Kalaleh and Azadshahr were identified as F. graminearum using morphological features then 96 isolates were confirmed by polymerase chain reaction (PCR) assay using F. graminearum species-specific primers (Fg16F/Fg16R). Based on sequences of Tri13 gene involved in the mycotoxin biosynthetic pathway, PCR assays was used to detect Nivalenol (NIV) and Deoxynivalenol (DON) chemotypes. Of the 96 tested isolates with Tri13 PCR assays, 70 classified as NIV chemotype and the remaining 26 isolates as DON producers. These results indicated that NIV chemotype was the most dominant chemotype in studied zones. A greater proportion of NIV chemotype was found in Gorgan fields (P < 0.05, P < 0.0001), whereas greater proportion of DON was detected in Gorgan and Gonbad fields (P < 0.05, P < 0.0001). Chemotyping by PCR assay were confirmed using HPLC method. These results demonstrated that PCR assay and HPLC could be used as rapid, reliable and cost-effective methods for the detection and identification of mycotoxin-producing Fusarium-species and may thus help to develop strategies to avoid or reduce mycotoxin contamination of cereals.
Volume 3, Issue 4 (12-2015)
Abstract
Aim: This study was performed to investigate the general mental health and aggression in female prisoners in Isfahan with the aim of determining whether the scores of aggression and general mental health differ according to selected demographic characteristics.
Methods: This cross-sectional, descriptive correlational study was performed in the central prison of Isfahan. Regarding the inclusion and exclusion criteria, 170 female prisoners were selected and completed the study self-administered questionnaires including Buss–Perry Aggression Questionnaire (BPAQ (and General Health Questionnaire (GHQ‑28) as well as demographic information. Data were analyzed by SPSS20.
Findings: Five questionnaires were excluded due to deficiencies. Finally, 165 valid completed questionnaires were prepared for the analysis. According to the traditional ranking and cut-off point of 22 for GHQ‑28 scores, prevalence of suspected psychological disorders among participants was 87.9%. ANOVA test results showed significant differences between the GHQ-28 scores of participants with different characteristics. Females under 20 years old (P≤.001), single females (p=.015), and those who had no children (p=.021) reported higher scores in general mental health (higher values in the scale indicate more psychological symptoms) Likewise, there were significant differences between the BPAQ scores of participants with different characteristics (P≤.001).
Conclusion: Younger and single female prisoners and those who had no children were suffering from lower mental health and more aggression. The present study emphasizes on the necessity of psychological assistance and support to improve mental health of these groups of female prisoners.
Volume 4, Issue 2 (6-2015)
Abstract
Laboratory and field experiments were conducted to determine the efficacy of some insecticides on the control of Sarta longhorned beetle, Aeolesthes sarta Solsky adults and larvae. In the laboratory, three pairs of mated and non-oviposited adults were released on the logs of field elm, Ulmus minor Mill that had been treated with chlorpyrifos, carbaryl, permethrin or imidacloprid. In the field experiments, artificially infested U. minor var. umbraculifera Rehd trees were treated by imidacloprid and oxydemeton-methyl through soil and trunk injection. In the laboratory test the best results were obtained from imidacloprid and permethrin applications, because of occurrence of high adult mortality after short period and also preventing egg laying. Despite a few eggs that were laid on the chlorpyrifos treated logs, there were no living larvae in the sprayed logs. Results of the field tests showed that the number of living larvae did not differ significantly between oxydemeton-methyl and control treatment, however, imidacloprid injection was effective in controlling this pest.
Volume 4, Issue 3 (Number 3&4 - 2002)
Abstract
A solid state fermentation method was developed for the production of citric acid from date pulp (obtained of date syrup production from the process) by Aspergillus niger PTCC 5010. Poor yield was obtained when potassium ferrocyanide treated date pulp were used as substrate, but methanol at a 3-4% concentration markedly increased the forma-tion of citric acid from the waste. The optimum range of pH and moisture for citric acid production were 3.5-4.5, and 70-80% respectively. This method produced about 168g cit-ric acid per kg of date pulp under optimum conditions. On the basis of reducing sugar consumed, the yield was 87% within eight days.
K. Mazaheri, M. Darbandi, S. Vakilipour,
Volume 6, Issue 1 (9-2006)
Volume 6, Issue 1 (9-2006)
Abstract
Two essential steps in numerical simulation of a flow field are discretization of the computational space and discretization of the governing partial differential equations (pde’s). In the present work a triangular unstructured grid is utilized. Unstructured grids are recognized to be superior for complex geometries as well as for grid adaptation. For descritization of governing pde’s a finite element method is employed. This research presents a new implicit finite element method in a triangular unstructured grid. For convection term of Navier–Stokes equation a conservative upwind method is used, while a finite element method is used for viscous terms. Results are very promising for viscous flows inside a driven cavity.
Volume 7, Issue 1 (4-2017)
Abstract
Population growth in large cities in under developing countries have been forced the governments that are responsible for the provision of housing units, to seek solutions in the sphere of urban housing are desirable. Extensive experience in various countries, including the United States of America in the
years after World War II, the sample debut experience of this, which in contemporary era have been tested. Ekbatan before the Islamic Revolution in Iran and the seal housing in the eighties and nineties such that each location during the suburbs are. The main purpose of this paper is to evaluate the potential of the Urban Distressed Areas and Urban structure important in shaping the city center, in order to provide housing and create a vitality of space in the form of social life, in contrast to the suburban areas. In this paper, a review of the Literature and the International Treaties in the field of Housing and Urban Development Strategy Documents, deals, also present paper studies the past two decades of experience in the field of Mass Housing, analyzes the positive achievements and negative consequences arising from the various policies. Finally, based on the research findings to develop the
advantages of sites within the city, especially urban distressed areas. In the upcoming strategy paper “rational argument” is used as a research strategy. This article is mostly “Descriptive and Analytical” is. In this paper, using the strategy of “Rational Argument” technique “Analyzers of the Content”, “reasonable inference”, and tries to classify content, and thus to develop a coherent way to achieve the target pave. The main issue of this study is to investigate the consequences of inappropriate social, cultural and urban development of the city outskirts, and relying on the “reasoning” description of the research and development projects based on the remaking of old and important housing within the cities logical. The results showed improper factors marginal urban housing development include: 1. Lack of
Participation 2. Households Cultural Exchange 3. The problems of Access to the Towns of Origin 4. The
Cost of Providing Infrastructure 5. The difficulty of Macro Management -6Conflict Patterns of Life 7. Adverse
Environmental Effects 8. Social Insecurity It is also important factors in selected urban distressed areas
and to provide affordable housing include 1. The Recovery of the Initial Nuclear Generating Urban
areas 2. Diversification of Activities in Single Activity Centers 3. Raising the Level of Security 4. The Cost
reduction and enables the Creation of Parallel Supplement 5. Easy of Macro Management 6. Ability
to Develop the Project 7. The Participation of Households’ 8. Growth Economic Value of Historic Areas
10. Control the Inappropriate Development of the City. The results show that the Endogenous versus
Conventional Approach to Residential Development in Historic Cities more appropriate.
1. Introduction
Why Population Growth and the need to Achieve Long-Term Solutions to the provision of housing, is
the main concern for metropolitan policy?
Actions on housing supply in all countries and global macroeconomic management. Measures such
as the UN Conference on residential areas in June 1996 in Istanbul Turkey, issues of human settlements
development and management in the 21st-century look. The projects under the United Nations
Human Settlements Program “UN-HABITAT “The former United Nations Centre for Human Settlements
was called by the defense, setting policy, capacity building, knowledge creation and strengthening
partnerships Governments and civil society to support the sustainable development of human
settlements. It is also responsible for the international community to help improve the lives of at least
hundred million slum dwellers Millennium Development Goal of reducing by half the proportion of
people without access to safe drinking water, permanent 2020 to fulfill. as part of the Declaration
stated, “We have come together to take this opportunity and the global goals of” adequate shelter for
all “and become human settlement safer, healthier, more capability for life, more equitable, sustainable
and effective, we endorse. We have two major themes of the conference, “adequate shelter for all”
this situation analyzed a large number of theories and approaches to urban planning and design with
qualified, small and certain human scales within the scope of local community and the findings make
them far away from their own positive traditions and their appropriate native cultural identification.
A historical survey on global experiences in policy making for neighborhood exceptional pattern
indicate the common problem of destroying self-oriented social relations and a concept of collective
life in such neighborhoods which undeniably cause to destroy the feeling of social cohesion and
continually losing of social capital in neighborhood pattern. Also the existence of high population
which makes congested neighborhoods may lay suitable backgrounds for committing social crimes
and damages which in turn directly influence the perception of the dwellers’ security and safety.
Studies conducted include two different textures of a neighborhood and the research process is
based on recognizing coherence between anti-social behavior and design variables in the pattern of
residential neighborhood.
In summary, the article studies two different textures in the selected neighborhood and compare
them to find the relation between the abnormal behavior and the type and pattern of the residential
places in there.
Conclusion:
Assessment of the neighborhood dwellers about their living places influences the level or extent
of the achieving objectives and success in urban projects. Also by recognizing factors contributing
on inhabitants’ degree of satisfaction and dissatisfaction, and understanding available conditions
regarding residence quality, the future approaches have been suggested for promoting the environment
qualitative level and prevention from a repetition of some inappropriate actions in other places.
In the literature, satisfaction from environmental appearance has been considered as a key criterion
for the evaluation of the degree of environmental quality. This is due to the important fact that the
high-quality environment is defined as an environment which brings the high level of satisfaction feelings
to its population through socio-cultural and physical means.
years after World War II, the sample debut experience of this, which in contemporary era have been tested. Ekbatan before the Islamic Revolution in Iran and the seal housing in the eighties and nineties such that each location during the suburbs are. The main purpose of this paper is to evaluate the potential of the Urban Distressed Areas and Urban structure important in shaping the city center, in order to provide housing and create a vitality of space in the form of social life, in contrast to the suburban areas. In this paper, a review of the Literature and the International Treaties in the field of Housing and Urban Development Strategy Documents, deals, also present paper studies the past two decades of experience in the field of Mass Housing, analyzes the positive achievements and negative consequences arising from the various policies. Finally, based on the research findings to develop the
advantages of sites within the city, especially urban distressed areas. In the upcoming strategy paper “rational argument” is used as a research strategy. This article is mostly “Descriptive and Analytical” is. In this paper, using the strategy of “Rational Argument” technique “Analyzers of the Content”, “reasonable inference”, and tries to classify content, and thus to develop a coherent way to achieve the target pave. The main issue of this study is to investigate the consequences of inappropriate social, cultural and urban development of the city outskirts, and relying on the “reasoning” description of the research and development projects based on the remaking of old and important housing within the cities logical. The results showed improper factors marginal urban housing development include: 1. Lack of
Participation 2. Households Cultural Exchange 3. The problems of Access to the Towns of Origin 4. The
Cost of Providing Infrastructure 5. The difficulty of Macro Management -6Conflict Patterns of Life 7. Adverse
Environmental Effects 8. Social Insecurity It is also important factors in selected urban distressed areas
and to provide affordable housing include 1. The Recovery of the Initial Nuclear Generating Urban
areas 2. Diversification of Activities in Single Activity Centers 3. Raising the Level of Security 4. The Cost
reduction and enables the Creation of Parallel Supplement 5. Easy of Macro Management 6. Ability
to Develop the Project 7. The Participation of Households’ 8. Growth Economic Value of Historic Areas
10. Control the Inappropriate Development of the City. The results show that the Endogenous versus
Conventional Approach to Residential Development in Historic Cities more appropriate.
1. Introduction
Why Population Growth and the need to Achieve Long-Term Solutions to the provision of housing, is
the main concern for metropolitan policy?
Actions on housing supply in all countries and global macroeconomic management. Measures such
as the UN Conference on residential areas in June 1996 in Istanbul Turkey, issues of human settlements
development and management in the 21st-century look. The projects under the United Nations
Human Settlements Program “UN-HABITAT “The former United Nations Centre for Human Settlements
was called by the defense, setting policy, capacity building, knowledge creation and strengthening
partnerships Governments and civil society to support the sustainable development of human
settlements. It is also responsible for the international community to help improve the lives of at least
hundred million slum dwellers Millennium Development Goal of reducing by half the proportion of
people without access to safe drinking water, permanent 2020 to fulfill. as part of the Declaration
stated, “We have come together to take this opportunity and the global goals of” adequate shelter for
all “and become human settlement safer, healthier, more capability for life, more equitable, sustainable
and effective, we endorse. We have two major themes of the conference, “adequate shelter for all”
this situation analyzed a large number of theories and approaches to urban planning and design with
qualified, small and certain human scales within the scope of local community and the findings make
them far away from their own positive traditions and their appropriate native cultural identification.
A historical survey on global experiences in policy making for neighborhood exceptional pattern
indicate the common problem of destroying self-oriented social relations and a concept of collective
life in such neighborhoods which undeniably cause to destroy the feeling of social cohesion and
continually losing of social capital in neighborhood pattern. Also the existence of high population
which makes congested neighborhoods may lay suitable backgrounds for committing social crimes
and damages which in turn directly influence the perception of the dwellers’ security and safety.
Studies conducted include two different textures of a neighborhood and the research process is
based on recognizing coherence between anti-social behavior and design variables in the pattern of
residential neighborhood.
In summary, the article studies two different textures in the selected neighborhood and compare
them to find the relation between the abnormal behavior and the type and pattern of the residential
places in there.
Conclusion:
Assessment of the neighborhood dwellers about their living places influences the level or extent
of the achieving objectives and success in urban projects. Also by recognizing factors contributing
on inhabitants’ degree of satisfaction and dissatisfaction, and understanding available conditions
regarding residence quality, the future approaches have been suggested for promoting the environment
qualitative level and prevention from a repetition of some inappropriate actions in other places.
In the literature, satisfaction from environmental appearance has been considered as a key criterion
for the evaluation of the degree of environmental quality. This is due to the important fact that the
high-quality environment is defined as an environment which brings the high level of satisfaction feelings
to its population through socio-cultural and physical means.
Volume 11, Issue 5 (Supplementary Issue - 2009)
Abstract
The estimation of velocity distribution plays a major role in the hydrodynamics of vegetated streams or rivers of extensive natural floodplains. The velocity profile in vegetated channels can be divided into three zones: uniform zone which is close to bed with uniform velocity distribution, logarithmic zone which involves the main channel with no vegetive cover and the transition zone that is affected by the upper zone flow. In order to arrive at an analytical solution to the force balance that governs the flow specific turbulence, characteristics of the flow through the vegetation are required. A new analytical model for the velocity distribution in the transition zone of vegetated (inflexible submerged vegetation) channels is hereby developed. The model is based on a force equilibrium equation and on Prandtl Mixing Length concept. Vegetation is treated as a homogeneous field of identical cylindrical stems and the flow field considered as uniform and steady. The proposed procedure is straightforward; it follows principles of fluid mechanics and shows good agreement with laboratory flume experiments. The new model can be employed for an exact estimation of discharge through naturally vegetated rivers. The model has been calibrated and verified. The results imply a desirable correlation between calculated and observed data.
Volume 12, Issue 48 (9-2015)
Abstract
In this research, the production of low fat butter, as a novel product, based on full-fat soy flour and sodium caseinate was studied. Water : butter ratio, soy flour : sodium caseinate ratio and emulsifier content were the designed factors and their effects on rheological properties of low-fat butter such as hardness, spreadability, adhesiveness, elasticity and consistency were evaluated. The Central Composite Design (CCD) and Response Surface Methodology (RSM) were employed as experimental design and statistical analysis. By increasing water to butter ratio, as a principal factor affecting on product characteristics, hardness, adhesiveness, elasticity, consistency and spreadability were reduced. The final product was w/o emulsion which was low-calorie, had functional and nutritional effects due to protein components and also its properties could be compared with ordinary butter. Based on final results, the optimum formulation for low-fat butter were: water : butter ratio as 1.03 (50% water and 48.5% butter), soy flour : sodium caseinate as 1.57 (5% soy flour and 3.2% sodium caseinate) and 0.66% emulsifier.
Volume 12, Issue 49 (10-2015)
Abstract
In this study, full fat soy flour was used in the formulation of breakfast cream containing 30% fat. Different levels of full fat soy flour (5 - 22.5%) and water content (15 - 37.5%) in two type of formulated cream with 55 and 70 % breakfast cream were evaluated. The effect of formulation on physicochemical properties (viscosity, syneresis, acidity and pH ), sensory properties (taste, texture, color and appearance and total acceptance) and economical yield were evaluated. The results of this research showed that the effect of formulation on all physicochemical and sensory properties of cream and also economical yield was significant .The E sample had the least difference with control in physicochemical properties (viscosity 4.86 Pa.S, syneresis 21%, and moisture content 65.8%) and the C sample received higher scores of texture and total acceptance than the other formulations.
Volume 13, Issue 1 (Spring 2023)
Abstract
Aims: In the protection of places with cultural significance, the identification and assessment procedure is the basic phase and generally the first step. Considering the specific characteristics of Modern and contemporary heritage, a framework for this procedure is necessary. The purpose of this research is to propose a framework based on the activities, documents and research done in this field in the global context.
Methods: This research is based on the descriptive-analytical method with library-study and logical reasoning in the three areas of registration, identification and assessment of modern works.
Findings: In this study, while reviewing the activities and researches, the criteria of the world heritage guidelines effective on the registration of modern heritage, the historical thematic identification frameworks of this heritage and a method for assessment the buildings of the era have been introduced. At the end, based on these cases, a model and framework of the assessment process of modern architectural heritage is proposed. Also, it’s usage has been investigated in a domain of Iranian heritage works.
Conclusion: A framework for the assessment process of the modern architectural heritage provides the possibility of clarifying and facilitating the registration, identification and assessment of these works. Such a framework, taking into account the nature of Modern and contemporary heritage and its commonalities in the global context, has the possibility of being formulated as a general framework. To use in a national or regional context, it is necessary to adapt it considering the historical, cultural and social characteristics of the context.
Kiumars Mazaheri, Hossein Shojaee,
Volume 13, Issue 3 (6-2013)
Volume 13, Issue 3 (6-2013)
Abstract
In most airbag systems, the gaseous mixture that fills up the airbag is produced by the fast combustion of a propellant in a combustion chamber called inflator. Since the process of gas production in the airbag inflator is a high-temperature combustion process, having a right understanding and precise control over the combustion in the airbag inflator has always been a challenge. In this paper, the numerical study of combustion process in a pyrotechnic inflator was carried out based on a Zero-Dimensional Multi Zones model. The parametric study show that the performance of inflator is more affected by the propellant characteristics such as mass, combustion index, and propellant temperature coefficient and is not significantly influenced by hardware elements of inflator. In order to simulate hybrid pyrotechnic inflator, the initial pressure of gas plenum was increased by 25 to 50 times. As a result, the performance both in combustion chamber and in discharge tank decreased. This lower temperature leads to a higher thermal efficiency.
Volume 13, Issue 3 (Number 3 - 2011)
Abstract
The effect of different fertilizing systems and drought stress during grain development on grain minerals of barley (Hordeum vulgare L.) was studied in field experiments on a clay-loamy soil during 2007 and 2008 growing seasons. The treatments consisted of three irrigation regimes (main plots) of: Non-stressed (NS, normal irrigation continued until the end of plant physiological maturity), Moderate Stress (MS, irrigation ceased from the beginning of flowering to the beginning of grain filling stage and Severe Stress (SS, irrigation ceased from the beginning of flowering stage up to the end of physiological maturity) along with six fertilizing regimes consisting of no fertilizer application (control) (NF), phosphorous and nitrogen Biofertilizers (BF), 100% Chemical fertilizer (NPK) (CF), Vermicompost (VC) 5 t ha-1, 50% Chemical fertilizer (NPK)+50% Vermicompost (2.5 t ha-1) (CV), and 50% Chemical fertilizer (NPK)+ Biofertilizer (CB), assigned to the sub plots. Drought stress significantly increased grain minerals of N, Zn and Mn by 12, 27, and 7% as compared with control (NS), respectively. Average grain nitrogen concentration in chemical fertilizer (CF) treatment was significantly more than those in the other treatments followed by integrated fertilizing systems (CB and CV). Phosphorous concentration in grains produced in BF fertilizer medium was significantly higher than those in other treatments. Grain Fe and Zn concentrations increased through vermicompost application. However, Mn concentration was higher in grains fertilized with chemical fertilizer. It can be concluded that in barley production under water deficit conditions, grain mineral quality could be improved through integrated fertilizer application.
Ghassem Heidarinejad, Hadi Pasdarshahri, Kiumars Mazaheri,
Volume 13, Issue 4 (7-2013)
Volume 13, Issue 4 (7-2013)
Abstract
A numerical study for the simulation of induced-flow by a two-room compartment fire has been accomplished using a fully-coupled Large Eddy Simulation (LES) model which incorporates Smagorinsky and One-Equation Sub-Grid Scale (SGS) turbulence models. Also, modified Eddy Dissipation Concept (EDC) and Discrete Ordinate Methods (DOM) are used for incorporating combustion and radiation, respectively. The models are applied for a range of total heat release rate (HRR) for fire source in the center and corner of the fire room. Numerical results of prediction by each SGS model are validated and compared against well-known available experimental data. The predicted time-averaged temperature profiles at different location of the compartment for each case have been calculated and found to be in good agreement with the experimental data. The results also show that the accuracy of One-Equation SGS model for the prediction of the characteristics of fire is higher than those obtain by Smagorinsky SGS model. The air mixture at the fire room opening is higher for the centrally located fire source than the corner one.
Volume 13, Issue 54 (8-2015)
Abstract
Gluten-free formulations are often supplemented with proteins to improve their quality. The objectives of this work were to assess the impact of different concentration of soy flour in addition to 2% of carboxy methyl cellulose on gluten-free bread quality parameters. Therefore, soy flour and rice flour were combined respectively in concentrations: 0% & 100%, 10% & 90%, 20% &80%, and 30% & 70%. Soy flour addition had had positive effect on farinograph properties of dough such as water absorption. Adding soy flour up to 10% caused positive and significant differences in physical properties of bread such as specific volume, crumb hardness, and porosity. Colorimetric factors, except for L*, were not influenced by soy flour. Pictures obtained from SEM showed that bread containing 10% of soy flour had the best texture and rice bread (100% rice flour) in the next order showed suitable and porous structure. Best score from organoleptic test was related to bread containing 10% soy flour getting the highest score in total acceptability. Generally, adding 10% soy flour resulted in reduction of undesirable properties of rice bread. However, increasing concentration resulted in negative effects on qualitative and sensory properties of bread.
Volume 13, Issue 58 (0-0)
Abstract
Use of soy products in sesame cream composition led to produce nutritious and healthy product with better quality and quantity. In this study, the effect of replacing soy meal instead of sesame in producing sesame cream to reduce fat and increase the protein content and the use of lecithin as emulsifier to improve rubbibility on chemical, physical properties and sensory evaluation was examined. Replacement percent of soy meal (0, 20, 30 and 40 percent) and lecithin (7,5,0 and 10 % w/w) was considered in the formulation. By increasing soya meal and lecithin replacements, changes in fat, protein, hardness, color (l *, b *, a *) was significant. In soy meal replacing, significant moisture difference( p <0.05) was not reported. The treatment with 20 percent soy meal and 10 percent lecithin in terms of physical and sensory properties obtained highest score and evaluated as the optimal sample and treatments with 40% and soy flour and 10% lecithin in terms of the chemical properties due to increasing protein content and reducing the amount of fat was considered as the optimal treatment.
Volume 14, Issue 1 (Spring 2024)
Abstract
Adding a new structure to the historic district is one of the methods of urban conservation that needs more cautious compared to other methods. In this regard, international organizations have addressed this issue in documents. which until now, has been investigated and analyzed less precisely. So, in this research, for the purpose of design formulations, what they are is followed up. So, by studying the documents, the required data were collected and based on the theme and structure of the design, were summarized in three levels of attitude, approach and method. Then, with the help of comparative comparison and SPSS, the design approaches are described. The collected data show that three design approached have been proposed so far. In the first, presented in the Venice Charter, the Washington Charter, the Charter of the Principles of Review, Conservation and Structural Restoration of Architectural Architecture, the New Zealand Charter and the Bura Charter, historic district as document is preferable. Therefore, it is recommended to not change and homogeny. In the second, presented in the statement of Tlaxcala and San Antonio, historic district is seen as a document and a part of a city. Therefore, it is recommended to manage change and harmony based on traditionalism. In other documents, despite the similar attitude and approach, it has been recommended to harmony with regard to characteristics of district and contemporary expression with compatibility with it.
Volume 14, Issue 2 (Summer 2024)
Abstract
Aims: With the continuous growth of urban population and the development of cities, the demand for energy in the building sector, especially in residential areas, has significantly increased. The configuration and form of buildings, along with their architectural and structural features, have a noticeable impact on the energy consumption of buildings and environmental sustainability. The main objective of this research is to assess the thermal performance of buildings at the scale of the neighborhood unit.
Methods: This research was conducted using quantitative research methods and sensitivity analysis. The data collection methods included gathering information from credible library and online sources, as well as conducting field visits.
Findings: Research findings indicate that courtyard patterns are considered the most efficient, while linear patterns and discontinuous courtyard patterns are regarded as the least efficient residential block patterns in Zanjan. Furthermore, there is a significant correlation between energy consumption and layout and form indicators of the blocks, as well as moderate relationships with block proportions. The most efficient forms are octagonal and square shapes, and patterns with a length-to-width ratio ranging from 1 to 1.6 generally exhibit better energy performance.
Conclusion: studying and identifying efficient and inefficient patterns is important to reduce energy consumption in future design.
Alireza Alipoor, Kiumars Mazaheri, Ali Shamoonipour,
Volume 14, Issue 3 (6-2014)
Volume 14, Issue 3 (6-2014)
Abstract
In the present work, the dynamics of lean (ϕ =0.5) premixed hydrogen/air flames in a micro channel with prescribed wall temperature is studied. The investigation is carried out using the low Mach formulation of Navier-Stokes equations with detailed chemistry and molecular transport for different inflow velocity. Ignition-extinction repetitive, steady symmetry flame and asymmetric flame are observed as the inlet velocity increased. Close to lower flammability limit, ignition-extinction repetitive flame was observed duo to imbalance between chemical time scale and residence time scale. In this regime, the reacting flow is affected by high wall temperature and the extinction occurred by the flow temperature. Upon increasing the inlet velocity, symmetric flame can be observed due to the balance between time scales. It is observed that further increasing the inlet velocity would cause symmetry flame to become unstable because of presence of some perturbations in flow field. Based on the obtained results, it is suggested that the perturbations are created by preferential diffusion of species.
Volume 14, Issue 6 (11-2012)
Abstract
Yoghurt ice cream (YIC) or frozen yoghurt dessert can be regarded as a healthy alternative to plain ice cream. Also use of soy derived products in food formulations can lead to the development of products of improved nutritional and health promoting values. Yoghurt ice cream was prepared using full-fat soy flour to substitute 55% of non fat dry milk content. Product formulation comprised of 12% SNF, 10% fat, 18% sucrose, 0.4% stabilizer-emulsifier and 0.1% vanillin. The effect of incorporating yoghurt at the rate of 5.3%,15.9%, 26.5%, 37.1% and 47.7% of the total ice cream mix on the flow behavior, physico-chemical and sensory properties of Yoghurt Ice Cream was evaluated as compared with control, devoid of any yoghurt. The mixes all showed pseudoplastic flow behavior, with the viscosity increasing from 0.7 to 1.57 pa s when the yoghurt content increased from 0 to 47.7%. Higher contents of yoghurt in the mixes significantly improved the melting rate of the yoghurt ice cream where the minimum melting rate (16%) was obtained for the sample of 47.7% yoghurt content. The highest overrun value of 58% was obtained for the sample containing 15.9% yoghurt. However the specific gravity of the product decreased with increasing yoghurt content with the highest specific gravity of 1.108 being recorded for control. In the light of these findings, it can be concluded that yoghurt ice cream, containing full fat soy flour, can be successfully made by incorporating 25.6% yoghurt in the mix with the end product maintaining its acceptable sensory characteristics.