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Search Results: 1 - 10 of 659 matches for " Mohamadali Mohamadzadeh Rezaei "
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Crossed Testicular Ectopia: A Case Report
Behzad Feizzadeh Kerigh,Mohamadali Mohamadzadeh Rezaei
Urology Journal , 2005,
Retrocaval Ureter: A Study of 13 Cases
Aliasghar Yarmohammadi,Mohamadali Mohamadzadeh Rezaei,Behzad Feizzadeh,Hassan Ahmadnia
Urology Journal , 2006,
Abstract: Introduction: The aim of this study was to report our 23-year experience in the diagnosis and treatment of retrocaval ureter. Materials and Methods: Data from 13 patients with retrocaval ureter were reviewed. Intravenous urography and retrograde pyelography had been used for confirming the diagnosis. All of the patients had been symptomatic and undergone surgery. A control intravenous urography had been performed 6 months postoperatively. Results: The mean age of the patients was 23 years (range, 12 to 37 years). Twelve patients (92.3%) were men. The clinical manifestations were pyelonephritis in 7 (53.8%), right flank pain in 4 (30.8%), gross hematuria in 1 (7.7%), and ureteral calculus in 1 (7.7%). All of the patients had type 1 right-sided retrocaval ureter. Associated anomalies were seen in none of the patients. The control intravenous urography showed improvement of renal function. Conclusion: In our patients, the most common cause of referral was pyelonephritis. In symptomatic cases, operation is needed and can improve renal function.
Helicobacter Pylori Eradication can induce platelet recovery in chronic refractory idiopathic thrombocytopenic purpura
Azarm,Mohamadali Khami
International Journal of Hematology-Oncology and Stem Cell Research , 2005,
Abstract: The prevalence of Helicobacter pylori infection and the effect of its eradication on platelet count in 95 Iranian patients with chronic refractory autoimmune thrombocytopenic purpura (CRITP) was investigated. 69 of 95 patients were infected with H.pylori (72.6%). H.pylori eradication was obtained in 69 infected CRITP pa tients who were not in remission and had platelet count below 100×109 at the time of infection assessment. 4 pa tients failed to eradicate of H.pylori. During follow-up (median 22.5 months). 3 of 33 of responsive patients re lapsed after 14 months of eradication. 30 of 65 H.pylori-eradicated patients (46%) showed a significant increase in platelet count accompanied by a significant decrease of platelet-associated immunoglobulin G (IgG). In forteen patients without H.pylori infection, platelet counts did not significantly increase with the same treatment. On the other hand, eradication therapy did not affect platelet counts in 6 patients with gastric ulcer. This re sponse was maintained in all responding patients throughout the follow up period."nThe assessment of H.pylori infection and its eradication shoud be attempted in CRITP as this approach could be an effective strategy, at least for some of these patients
Soil and Subsurface Sediment Microzonation Using with Seismic Refraction Tomography for Site Assessment (Case Study: IKIA Airport, Iran)  [PDF]
Khalil Rezaei
Open Journal of Geology (OJG) , 2016, DOI: 10.4236/ojg.2016.63016
Abstract: The site effects relating to the amplification of ground motion under earthquake loading are strongly influenced by both the subsurface soil condition and the geologic structure. In this study, for site characterization at the Imam Khomeini International Airport (IKIA) area in south of Tehran, in-situ seismic refraction tomography were carried out as a part of site investigations project, in addition geologic setting, borehole drilling, ground waters information and measurements. Based on seismic refraction studies, three layers are separable which with increasing in depth the S and P wave velocity is increased and this indicates increasing in compaction of soil and geologic materials. In the second and third separated layers, the zones with low and high seismic shear wave velocity is approximately equal, and northeast and southwest of the airport site has the low velocities, in addition to containing loose soils, highly weathered stones, and low depth to groundwater. In terms of Poisson’s ratio, the most important and key installations of airport site are located in suitable positions. According to Iranian Seismic Code, most of the lands around the airport are in class 2 and 3. It seems that a fault or a discontinuity is passed from northwest to the southeast of the study area. This site, according to geological, subsurface geophysical, and geotechnical boreholes studies, is high risk-earthquake prone.
Dendritic cells: In the forefront of immunopathogenesis and vaccine development – A review
Mohamadzadeh Mansour,Luftig Ronald
Journal of Immune Based Therapies and Vaccines , 2004,
Abstract: Dendritic cellls (DCs) comprise an essential component of the immune system. These cells, as antigen presenting cells (APCs) to na ve T cells, are crucial in the initiation of antigen specific immune responses. In the past years, several DC subsets have been identified in different organs which exert different effects in order to elicit adaptive immune responses. Thus, identification of such DC subsets has led to a better understanding of their distribution and function in the body. In this review, several key properties of the immunobiology, immunopathogenesis and vaccine strategies using DCs will be discussed.
Identification of proteases employed by dendritic cells in the processing of protein purified derivative (PPD)
Mohamadzadeh Mansour,Mohamadzadeh Hamid,Brammer Melissa,Sestak Karol
Journal of Immune Based Therapies and Vaccines , 2004, DOI: 10.1186/1476-8518-2-8
Abstract: Dendritic cells (DC) are known to present exogenous protein Ag effectively to T cells. In this study we sought to identify the proteases that DC employ during antigen processing. The murine epidermal-derived DC line Xs52, when pulsed with PPD, optimally activated the PPD-reactive Th1 clone LNC.2F1 as well as the Th2 clone LNC.4k1, and this activation was completely blocked by chloroquine pretreatment. These results validate the capacity of XS52 DC to digest PPD into immunogenic peptides inducing antigen specific T cell immune responses. XS52 DC, as well as splenic DC and DCs derived from bone marrow degraded standard substrates for cathepsins B, C, D/E, H, J, and L, tryptase, and chymases, indicating that DC express a variety of protease activities. Treatment of XS52 DC with pepstatin A, an inhibitor of aspartic acid proteases, completely abrogated their capacity to present native PPD, but not trypsin-digested PPD fragments to Th1 and Th2 cell clones. Pepstatin A also inhibited cathepsin D/E activity selectively among the XS52 DC-associated protease activities. On the other hand, inhibitors of serine proteases (dichloroisocoumarin, DCI) or of cystein proteases (E-64) did not impair XS52 DC presentation of PPD, nor did they inhibit cathepsin D/E activity. Finally, all tested DC populations (XS52 DC, splenic DC, and bone marrow-derived DC) constitutively expressed cathepsin D mRNA. These results suggest that DC primarily employ cathepsin D (and perhaps E) to digest PPD into antigenic peptides.
Improving Quality of Service in Wireless Sensor Networks Using Multi-Path Routing
Marjan Radi,Behnam Dezfouli,MohamadAli Nematbakhsh
Majlesi Journal of Electrical Engineering , 2008, DOI: 10.1234/mjee.v2i4.126
Abstract: In many applications of wireless sensor networks, certain quality of end-to-end parameters is needed. Due to this requirement, supporting quality of service (QoS) in this kind of networks is of great importance. In recent years, multi-path routing technique is proposed as an effective approach to provide QoS. Utilizing multiple paths between senders and receivers, multi-path routing techniques can improve metrics such as reliability, power consumption, delay, throughput, and bandwidth. In this paper, we review the challenges of supporting QoS in wireless sensor networks. In addition, the benefits of multi-path routing are presented. Main elements of multi-path routing protocols are also introduced. At the end, we investigate the design of some multi-path routing protocols and present an application-based categorization of these protocols.
Studying and Developing Model of Six Sigma Implementation in Companies of Yazd House of Industry and Mine
Mollahoseini Ali,Forghani Mohamadali,Shahifar Milad
International Business and Management , 2011, DOI: 10.3968/j.ibm.1923842820110302.115
Abstract: Despite the increasing interest for Six Sigma implementations, there is also increasing concern about implementation failures. One major reason many implementations of Six Sigma methodology fail is lack of an effective implementation model. Asking CEOs about the most important factors for successful implementation of Six Sigma methodology the purpose of this research is to study and develop model of six sigma implementation in companies of Yazd House of Industry and Mine. The method used in this research is a descriptive-survey one. The research sample includes 276 top managers (CEOs) chosen randomly from among 1000 ones. To gather data a 63-material questionnaire (translated and altered) whose validity and reliability was achieved via existing ways. To analyze data we have used descriptive statistics (charts, frequency, average, Frequency percent, etc) and deductive statistics (Anova, x2, etc). The outputs show that more than 77 % of the participants suggest that all 11 factors mentioned in this research is significantly important for implementing six sigma in Companies of Yazd House of Industry and Mine. These factors include top management and leadership, six sigma teams, strategic planning, competitive benchmarking, process management, human resource development, education and training, quality tools, information and analysis, customer management and supplier management. A practical model for implementing six sigma in companies of Yazd House of Industry and Mine is also presented in this research out of research findings. Key words: Implementation model; Six Sigma;Companies of Yazd House of industry and mine
Improvement of Antenna Radiation Efficiency by the Suppression of Surface Waves  [PDF]
Homayoon Oraizi, Bahram Rezaei
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.33013
Abstract: The characteristics of coplanar waveguide (CPW) fed ring antennas (such as gain, efficiency and polarization purity) are degraded by the dielectric losses and excitation of surface waves on the substrates. To counteract such effects, we propose to remove some portions of the substrate in the vicinity of the metallic patches, which effectively eliminates the conditions for the generation of surface waves. The proposed technique is applied to a CPW-fed ring antenna and a prototype model is fabricated. The measurement data and the computer simulation results agree well and indicate the efficacy of the technique for the improvement of antenna gain and efficiency.
Radiative Heat Transfer and Thermocapillary Effects on the Structure of the Flow during Czochralski Growth of Oxide Crystals  [PDF]
Reza Faiez, Yazdan Rezaei
Advances in Chemical Engineering and Science (ACES) , 2015, DOI: 10.4236/aces.2015.53040
Abstract: A numerical study was carried out to describe the flow field structure of an oxide melt under 1) the effect of internal radiation through the melt (and the crystal), and 2) the impact of surface tension-driven forces during Czochralski growth process. Throughout the present Finite Volume Method calculations, the melt is a Boussinnesq fluid of Prandtl number 4.69 and the flow is assumed to be in a steady, axisymmetric state. Particular attention is paid to an undulating structure of buoyancy-driven flow that appears in optically thick oxide melts and persists over against forced convection flow caused by the externally imposed rotation of the crystal. In a such wavy pattern of the flow, particularly for a relatively higher Rayleigh number\"\" , a small secondary vortex appears nearby the crucible bottom. The structure of the vortex which has been observed experimentally is studied in some details. The present model analysis discloses that, though both of the mechanisms 1) and 2) end up in smearing out the undulating structure of the flow, the effect of thermocapillary forces on the flow pattern is distinguishably different. It is shown that for a given dynamic Bond number, the behavior of the melt is largely modified. The transition corresponds to a jump discontinuity in the magnitude of the flow stream function.
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