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Minimizing Products Rates Variation in Just-in-Time Mixed-Model Manufacturing  [PDF]
Ghorbanali Mohammadi, Darius Mohammadi
American Journal of Operations Research (AJOR) , 2016, DOI: 10.4236/ajor.2016.62017
Abstract: Mixed-Model assembly lines are often used in manufacturing based on just-in-time techniques. The effective utilization of these lines requires a schedule for assembling the different models be determined. The objective is to minimize the total deviation of actual production rates from the desired production rates. Mathematical method with the optimization algorithm is proposed here to solve this problem. To prove the efficiency of the proposed algorithm, a number of test problems are solved. The results show that the proposed algorithm is an efficient and effective algorithm which gives better results with the large problem sizes. This paper presents a practical procedure to minimize total product variation rates, and easy to use by practitioner.
Investigating the Linguistics Features of Bayza Dialect
Ghorbanali Ebrahimi
Journal of Language Teaching and Research , 2012, DOI: 10.4304/jltr.3.3.369-378
Abstract: Bayza is a dialect spoken in the southwest of Iran in Fars province. This paper examines phonetic peculiarities, morphological system and vocabulary of this dialect. The dialect of Bayza has not yet been studied and described by either Iranians or non-Iranians researchers. Bayza is a region in Fars province and is located 50 kilometers northwest of Shiraz. This region is considered as one of the most ancient centers of Iran. Its Elamite-Achaemenian name is Anzan or Anshan. During Sassanid period, it was called “Darespid” and later on it was changed to Bayza by Arabs. Bayza is a fertile region with a mild and pleasant climate. Its population is around 45000, and the main job of its people is farming and animal husbandry. The Bayza dialect is among the dialects associated with the southwest Persian languages. In this paper, Bayza dialect is studied at the level of phonemics, phonetics, morphology and vocabulary.
Correlation and Path Coefficient Studies in F2 Populations of Rice
Ghaffar KIANI,Ghorbanali NEMATZADEH
Notulae Scientia Biologicae , 2012,
Abstract: This study performed to determine the association between grain yield and yield components in fifty-four selected rice genotypes at F2 populations. Results showed that traits, the panicles per plant (r = 0.751) and filled grains per panicle (r = 0.458) correlated significantly with grain yield, while grain yield was negatively associated with non-filled grains per panicle (-0.297). Path coefficient analysis revealed that grain yield was associated with panicles per plant and filled grains per panicle with the direct effects of 0.691 and 0.568, respectively. The greatest indirect effect belonged to panicle length (0.301) through filled grains per panicle. Stepwise regression analysis showed that 72.1 percent of yield variation could be explained by three characters: the panicles per plant, filled grains per panicle and panicle length. Information obtained in this study revealed that traits, the panicles per plant and filled grains per panicle, could be used as selection criteria for grain yield improvement at segregating populations of rice.
Exponential B-Spline Solution of Convection-Diffusion Equations  [PDF]
Reza Mohammadi
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.46129
Abstract: We present an exponential B-spline collocation method for solving convection-diffusion equation with Dirichlet’s type boundary conditions. The method is based on the Crank-Nicolson formulation for time integration and exponential B-spline functions for space integration. Using the Von Neumann method, the proposed method is shown to be unconditionally stable. Numerical experiments have been conducted to demonstrate the accuracy of the current algorithm with relatively minimal computational effort. The results showed that use of the present approach in the simulation is very applicable for the solution of convection-diffusion equation. The current results are also seen to be more accurate than some results given in the literature. The proposed algorithm is seen to be very good alternatives to existing approaches for such physical applications.
Acoustic Modeling of a 3-Layered Panel Incorporating Electro-Rheological/ Magneto-Rheological (EMR) Fluids  [PDF]
Nader Mohammadi
Open Journal of Acoustics (OJA) , 2014, DOI: 10.4236/oja.2014.41001
Abstract: Applications of Electro-Rheological (ER) or Magneto-Rheological (MR) fluids as typical smart materials have been widely investigated over the past decades (since their introduction in 40s). The special applications of these materials as a means of noise suppression are not yet investigated. Constrained Layer Damping (CLD) sheets can be realized by incorporating EMR (ER/MR) materials. In this way, a multilayered damping sheet is obtained with adaptive (tunable) stiffness and damping characteristics. These properties are easily changed in proportion to the electric (magnetic) field applied upon the EMR layer. This notion has been introduced for semi-active vibration control problems. Herein, such panels incorporating EMR material are proposed for adaptive acoustic treatments. Modeling (simulation) of a 3-layered panel with the middle layer being EMR with adjustable
Experimental Evaluation of Transmission Loss of a Glass Cylinder Tube Containing a Fluid  [PDF]
Nader Mohammadi
Open Journal of Acoustics (OJA) , 2014, DOI: 10.4236/oja.2014.41002
Abstract: Transmission Loss (TL) of a glass cylinder tube containing a fluid is studied experimentally. This test specimen represents a typical double layer panel including a fluid. The tests are carried out by using a modified four-microphone standing-wave (impedance) tube for specimens with different lengths, 15 and 30 mm. Each cylinder tube is tested filled with one of the fluids at a time. The fluids are air, water, motor oil and a nanoparticle fluid (in absence of magnetic field). The effects of the cylinder length (thickness), impedance tube terminations, and the containing fluid are discussed. The increasing of the thickness led to an increase of the TL values and a decrease in resonance frequencies. Also, the addition of liquid middle layer led to considerable increase of the TL.
An Improved Synthesis and Preliminary Biodistribution Study of a Technetium-99m-labeled 2-amino-2-deoxy(thioacetyl)-D-glucose Complex ([99mTc]-TA-DG) As a Tumor Imaging Agent
Fariba Johari Daha,Masoud Sadeghzadeh,Ghorbanali Charkhlooie,Kazem Haghir Ebrahimabadi
Iranian Journal of Nuclear Medicine , 2007,
Abstract: Introduction: This report describes the synthesis of 2-Amino-2-deoxy(S-benzoylthioacetyl)-D-glucose (S-Bz-TA-DG), radiolabeled with [99mTc(CO)3(OH2)3]+ complex with a procedure including deprotection of the benzoyl group, characterization by HPLC using a C18 reverse phase column and preliminary biodistribution study in normal mice. Methods: [99mTc(CO)3(H2O)3]+ complex was used to label TA-DG with 99mTc. This complex was prepared using up to 46 mCi of Na99mTcO4 in 1mL saline. The radiochemical purity (>95%) was determined by TLC in normal saline solution as the mobile phase. Radio-HPLC analysis of [99mTc]-(TA-DG) at pH=9.5-10, revealed that labeling with 99mTc resulted in the formation of three radiochemical species (Na99mTcO4 with tR=5.7 min, [99mTc(CO)3(H2O)3]+ complex with tR=27.5 min and [99mTc]-(TA-DG) [yield >85%] with tR=8.2 min) with different HPLC-profiles. Results:. The biodistribution of the [99mTc]-(TA-DG) complex was studied in normal mice (body mass 25-35 g) at 30 min and 1 h post-injection, according to a published procedure. This complex showed negligible brain uptake (0.13%±0.03 ID) at 30 min post-injection, an efficient clearance from the blood, a rapid excretion to the urine and a low retention in the liver and kidneys.Conclusion: Nonfunctionalized carbohydrate compounds such as glucose are generally weak ligands for chelating with 99mTc. Therefore, functionalization with an external chelating group or the insertion of some functional groups is essential to obtain strong metal-binding compounds. On the basis of our results, it seems that [99mTc]-(TA-DG) has not most of the favorable properties as an imaging agent for brain tumors.
Effects of dietary energy and protein dilution and time of feed replacement from starter to grower on broiler chickens performance
Behrooz AZIZI,Ghorbanali SADEGHI,Ahmad Karimi,,Fakhradin ABED
Journal of Central European Agriculture , 2011, DOI: 10.5513/jcea01/12.1.879
Abstract: An experiment was conducted to study the effects of dietary energy and protein dilution and time of feed replacement from starter to grower on performance of broilers with a 2×3 factorial arrangement in a completely randomized design with 480 day-old broilers from 1-42 day of age. Experimental treatments were 5% energy and protein diluted diets and starter diet was fed to 7, 14 or 21 days and finisher diet was fed beginning at 35 days. Grower diet was fed for variable times depending upon termination of feeding starter diet and initiation of finisher diet. Dilution of both energy and protein had no (P>0.05) significant effect on chicks performance, but significantly (P<0.05) increased breast meat yield. Reduction the time of feeding starter diet did not show any significant effects on bird's performance. From 1-42 days of age, the interaction between dilution of both energy and protein and changing time from starter to grower diets on body weight and feed intake was not significant(P<0.05). The results from this study suggest that diluting of both energy and protein up to 5% from 1-42 days of age and decreasing the time of starter diet had no adverse effect on broiler chickens performance and it may be beneficial economically.
Effect of cyproheptadine on combat related PTSD nightmares
Ahmadzadeh Gholamhossien,Asadolahi Ghorbanali,Mahmodi Gavad,Farhat Arezoo
Annals of General Psychiatry , 2006, DOI: 10.1186/1744-859x-5-s1-s159
Flame Atomic Absorption Spectrometric Determination of Trace Amounts of Zinc and Thallium in Different Matrixes after Solid Phase Extraction on Modified Multiwalled Carbon Nanotubes  [PDF]
Sayed Zia Mohammadi
American Journal of Analytical Chemistry (AJAC) , 2012, DOI: 10.4236/ajac.2012.35049
Abstract: The potential of modified multiwallcd carbon nanotubes, as a solid-phase extraction sorbent for the simultaneous separation and preconcentration of zinc and thallium has been investigated. Zinc and thallium were adsorbed quantitatively onto modified multiwalled carbon nanotubes in the pH range of 3 - 6.5. Parameters influencing the simultaneous preconcentration of Zn(II) and Tl(I) ions such as pH of the sample, sample and eluent flow rate, type and volume of elution solution and interfering ions, have been examined and optimized. Linearity was maintained between 0.1 to 20.0 μg?mL–1 for thallium and 20.0 ng?mL–1 to 5.0 μg?mL–1 for zinc in the final solution. The defection limits based on three times the standard deviation of the blank signal (n = 8) for thallium and zinc were 5.1 and 1.4 ng?mL–1, respectively. Seven replicate determination of a mixture of 5.0 and 0.2 μg?mL–1 of thallium and zinc in the final solution gave a mean absorbance of 0.085 and 0.074 with relative standard deviation 1.5% and 1.7%, respectively. The method has been applied for the determination of trace amounts of zinc and thallium in biological and water sample with satisfactory results.
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