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Search Results: 1 - 10 of 13181 matches for " Mohammad Sadegh Safaee Firouzabadi "
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Evaluation of Effect of Peppermint as a New Preventive Method for Milk Fever and Subclinical Hypocalcaemia in Transition Holstein Cows
Mehdi Goodarzi,Mohammad Sadegh Safaee Firouzabadi,Mohammad Mahdi Zarezadeh Mehrizi,Mohsen Jafarian
International Journal of Animal and Veterinary Advances , 2012,
Abstract: Milk fever and subclinical hypocalcaemia are the most important macromineral disorders that affect transition dairy cows. Feeding peppermint to dairy cattle due to physiological or pharmacological functions may effect rumen fermentation and digestibility. Thus, in the present study, peppermint was tested for its effects upon serum calcium and urine pH levels in transition Holstein cows. Twenty dairy cattle (the last 3 weeks prepartum) were divided into 2 groups. Group 1 (control) treated with no peppermint and group 2 (treatment) treated with peppermint. To determine serum calcium and urine pH levels, blood and urine were taken in start of experiment, after 15 days adaptation period with the peppermint being mixed with concentrate and 12 h after calving in second milking. Serum calcium and urine pH levels between control group and treatment group were not significantly different (p>0.05) in start of experiment, but their levels after 15 days adaptation period and 12 h after calving were significant (p<0.05). In treatment group serum calcium and urine pH difference between before treatment and after treatment in three different times were different significantly (p<0.05). According to these results, it can be concluded that peppermint has a great potential as a new preventive method for milk fever and subclinical hypocalcaemia by inducing mild metabolic acidosis or any unknown mechanism.
Using DEA and AHP for Ratio Analysis  [PDF]
Mohammad Sadegh Pakkar
American Journal of Operations Research (AJOR) , 2014, DOI: 10.4236/ajor.2014.44026

This research proposes an integrated approach to the Data Envelopment Analysis (DEA) and Analytic Hierarchy Process (AHP) methodologies for ratio analysis. According to this, we compute two sets of weights of ratios in the DEA framework. All ratios are treated as outputs without explicit inputs. The first set of weights represents the most attainable efficiency level for each Decision Making Unit (DMU) in comparison to the other DMUs. The second set of weights represents the relative priority of output-ratios using AHP. We assess the performance of each DMU in terms of the relative closeness to the priority weights of output-ratios. For this purpose, we develop a parametric goal programming model to measure the deviations between the two sets of weights. Increasing the value of a parameter in a defined range of efficiency loss, we explore how much the deviations can be improved to achieve the desired goals of the decision maker.This may result in various ranking positions for each DMU in comparison to the other DMUs. An illustrated example of eight listed companies in the steel industry of China is used to highlight the usefulness of the proposed approach.

Using DEA and AHP for Multiplicative Aggregation of Hierarchical Indicators  [PDF]
Mohammad Sadegh Pakkar
American Journal of Operations Research (AJOR) , 2015, DOI: 10.4236/ajor.2015.55026
Abstract: The author [Pakkar, M.S. (2014) Using Data Envelopment Analysis and Analytic Hierarchy Process to Construct Composite Indicators. Journal of Applied Operational Research, 6(3), 174-187.] recently proposed a multiplicative approach using Data Envelopment Analysis (DEA) and Analytic Hierarchy Process (AHP) to reflect the priority weights of indicators in constructing composite indicators (CIs). Nonetheless, this approach is limited to the situations with a single level hierarchy which might not satisfy the needs of a multiple level hierarchy. Therefore, the current paper extends this approach to the situations in which the indicators of similar characteristics can be grouped into sub-categories and further linked into categories to form a three-level hierarchical structure. An illustrative example of road safety performance for a set of European countries highlights the usefulness of the proposed “extended approach”.
Synthesis and Biomedical Application of SiO2/Au Nanofluid Based on Laser-Induced Surface Plasmon Resonance Thermal Effect  [PDF]
Mohammad E. Khosroshahi, Mohammad Sadegh Nourbakhsh, Lida Ghazanfari
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.29112
Abstract: We described the synthesis of Au coated SiO2 nanoshells linked with NH2 biomolecular ligands using a simple wet chemical method with a particular application for laser tissue soldering. Tunable nanoshells were prepared by using different gold colloidal concentrations. The nanoshells are characterized by UV-vis spectroscopy, FTIR, XRD and AFM. The FTIR results confirmed the functionalized surfaces of silica nanoparticles with NH2 terminal groups. A broad absorption was observed between 470 - 600 nm with a maximum range between 530 - 560 nm. Based on the XRD results three main peaks of Au (111), (200) and (220) were identified. In addition, AFM results showed that the diameter of silica core was between 90 - 110 nm with gold shell thickness between 10 - 30 nm. A possible tissue soldering using gold nanoshells and laser-induced thermal effect based on surface plasmon resonance is demonstrated. In our case this corresponds to 90?C (i.e. below vaporization) using the higher gold concentration (2 ml) at 60 W·cm–2.
A Comparative Study of Different Kalman Filtering Methods in Multi Sensor Data Fusion
Mohammad Sadegh Mohebbi Nazar
Lecture Notes in Engineering and Computer Science , 2009,
Techno-Economical Unit Commitment Using Harmony Search Optimization Approach
Mohammad Sadegh Javadi
International Journal of Applied Power Engineering , 2012, DOI: 10.11591/ijape.v1i1.434
Abstract: -In this paper, Security-Constrained Unit Commitment (SCUC) model is proposed in a restructured power system. This model consists of a closed-loop modified Unit Commitment (UC) and Security-constrained Optimal Power Flow (SCOPF). The objective of this SCUC model is to obtain the maximum social welfare-based system operating cost while maintaining the system security. In conventional power systems, the demand was forecasted before market operation and determined as a fixed constant. Supplying this demand was therefore considered as a constraint. However, in restructured power system which is based on Standard Market Design (SMD), DISCOs offer the demand and their proposed prices; therefore the demand is modeled as an elastic load. Independent System Operator (ISO) is responsible for operating the power market. The ISO performed the power market using the SCUC software to obtain feasible and economical operation as much as possible. In this paper, Harmony Search Algorithm (HSA) has been implemented to solve SCUC problem. Since the SCUC problem is a non-linear, mixed integer, large scale and non-convex problem, harmony search optimization is addressed as an efficient technique to overcome the aforementioned challenges. The simulation results show that the presented method is both satisfactory and consistent with expectation.
Security Constraint Unit Commitment Considering Line and Unit Contingencies- Particle Swarm Optimization
Mohammad Sadegh Javadi
International Journal of Applied Power Engineering , 2012, DOI: 10.11591/ijape.v1i1.433
Abstract: This paper presents a new approach for considering all possible contingencies in short-term power system operation. Based on this new approach, both generator and transmission line outages would be modeled in network-based power system analysis. Multi generator and also parallel transmission lines is modeled in this methodology. We also investigate this claim that feasibility and applicability of this approach is much more than the previous analytical methodologies. Security Constrained Unit commitment (SCUC) program which is carried out by Independent System Operator (ISO), is one of the complex problems which would be handled by this approach. In this paper, a DC-Optimal Power Flow (DCOPF) methodology has been implemented by particle swarm optimization technique. The Lagrangian Relaxation technique is based on the derivatives and the PSO is a non- derivative technique. These approaches are effective tools which can be implemented for short-term and long-term power system analysis, especially for economic analysis of restructured power systems. The DCOPF methodology has been considered for LMP calculation in LR, which is not available in PSO techniques. In the other hand, PSO technique may be able to provide the optimal solution, where LR usually getting stuck at a local optimum in a large scale power system. The simulation results show that the presented methods are both satisfactory and consistent with expectation.
New Characterizations of Fusion Bases and Riesz Fusion Bases in Hilbert Spaces
Mohammad Sadegh Asgari
Mathematics , 2012,
Abstract: In this paper we investigate a new notion of bases in Hilbert spaces and similar to fusion frame theory we introduce fusion bases theory in Hilbert spaces. We also introduce a new definition of fusion dual sequence associated with a fusion basis and show that the operators of a fusion dual sequence are continuous projections. Next we define the fusion biorthogonal sequence, Bessel fusion basis, Hilbert fusion basis and obtain some characterizations of them. we study orthonormal fusion systems and Riesz fusion bases for Hilbert spaces. we consider the stability of fusion bases under small perturbations. We also generalized a result of Paley-Wiener [13] to the situation of fusion basis.
Ability of Extension System to Accomplish Supportive Policies of Sustainable Agriculture in Iran
Mohammad Sadegh Allahyari,Mohammad Chizari
Journal of Applied Sciences , 2008,
Abstract: This study was carried out to assess the ability of extension system to accomplish supportive policies of sustainable agriculture as perceived by extension experts. A sample of 87 respondents was selected through simple random sampling technique and surveyed through a pre-designed questionnaire. Descriptive and inferential were used to analyze the date for drawing conclusion. The findings show that extension experts generally had a positive perception regarding the ability of extension system for the achievement of supportive policies of sustainable agriculture in Iran context. No significant differences between overall means of professionals` perceptions toward ability of extension system to achieve supportive policies of sustainable agriculture and their age, organizational position, years of experience or educational background were found. It is concluded that extension system had a more effective role to accomplish policies regarding the supporting local groups for community action.
On the Generality of Orthogonal Projections and e-Projections in Banach Algebras  [PDF]
Mohammad Sadegh Asgari, Seyedeh Sara Karimizad, Hamidreza Rahimi
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.25044
Abstract: In this paper we develop the orthogonal projections and e-projections in Banach algebras. We prove some necessary and sufficient conditions for them and their spectrums. We also show that the sum of two generalized orthogonal projections u and v is a generalized orthogonal projection if, uv=vu=0. Our results generalize the results obtained for bounded linear operators on Hilbert spaces.
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