alireza ranjbar - Academia.edu (original) (raw)

Papers by alireza ranjbar

Advances in Dermatology and Allergology

Introduction: Atopic diseases are global concerns in the today's industrialized world. Allergic r... more Introduction: Atopic diseases are global concerns in the today's industrialized world. Allergic rhinitis is the most rising healthcare expenditure. Aim (ZM) with the common name of Shirazi thyme, a randomized clinical trial was designed to evaluate the alleviation of the symptoms of allergic rhinitis. Material and methods: A total of 30 allergic rhinitis patients were randomly and equally assigned to experimental and control groups. Afterwards, the case group was treated with an extract of ZM and the control group with placebo for 2 months. Finally, the clinical signs and symptoms before and after the treatment according to the SNOT22 questionnaire were analysed. Results: Comparing the symptoms of allergic rhinitis and an average score of SNOT22 questionnaire between the Based on this questionnaire, our patients in the ZM syrup group had lower grades than before the treatment and experienced amelioration. Conclusions highly recommended. Since allergic rhinitis is a multifactorial condition, the use of herbal antioxidants along with

Article history: Received 8 September 2013 Received in revised form 21 October 2013 Accepted 29 O... more Article history: Received 8 September 2013 Received in revised form 21 October 2013 Accepted 29 October 2013 Available online 10 November 2013

Reports of biochemistry & molecular biology, 2018

Background Rhinitis, which occurs most commonly as allergic rhinitis and affects 20% of the world... more Background Rhinitis, which occurs most commonly as allergic rhinitis and affects 20% of the world's population, is a major health care burden causing significant morbidity. Considering the high prevalence of allergic rhinitis and anti-inflammatory effects of thyme, a favorite condiment, we performed a randomized clinical trial to determine whether thyme can relieve allergic rhinitis symptoms and affect the expression of TH17- and T-regulatory cell- (Treg) related cytokines IL-17, TGF-β, FOXP3, and IL-10. Methods Thirty patients with allergic rhinitis symptoms and positive skin prick test for common aero allergens were randomly assigned to experimental or control groups. The experimental group received thyme or Zataria multiflora (ZM) extracts and the control group received placebo for two months. Expression of IL-17, TGF-β, FOXP3, and IL-10 was evaluated in all subjects by real-time PCR before and after intervention. Results After treatment IL-17 expression was significantly les...

Article type: Review Article Asthma is a common chronic inflammatory and complex disease in child... more Article type: Review Article Asthma is a common chronic inflammatory and complex disease in children with many contributing (including genetic and environmental) factors. This study aims to review the impact of infections in children with asthma. Different websites including Googlescholar, Yahoo, Pubmed, SID.IR, MAGIRAN, IRANDOC, IRANMEDEX , Embase and Hand searching were searched for pertinent articles with keywords asthma, pediatric, infection, virus, bacteria, and fungus. Out of the results, full article s relevant to pediatric asthma were selected. Acute respiratory infections caused by Chlamydia pneumoniae and Mycoplasma pneumoniae are involved in 5%-30% of wheezing events and asthma attacks. Viral infections were previously found in 24% -34% of asthmatic children, but technological advancements have revealed them to be present in 77%-81% of cases, with rhinovirus found in 47%, Respiratory Syncytial Virus in 21%, and the rest (including influenza, parainfluenza, adenovirus, cor...

Software-Defined Networking (SDN) has evolved as a new networking paradigm to solve many of curre... more Software-Defined Networking (SDN) has evolved as a new networking paradigm to solve many of current obstacles and limitations in communication networks. While initially intended mainly for single-domain networks, SDN technology is going to be deployed also to large cloud-based data centers where several customers, called tenants, share network resources. In a multi-tenant environment, the SDN technology allows the customers to have higher level of control over the available network resources. However, as the underlying network elements and control logic are shared between multiple tenants, the isolation between tenant domains becomes an important factor in the design of all multi-tenant solutions. In this paper, we propose a scalable system architecture based on OpenFlow and packet rewriting that provides isolation and controlled sharing between tenants while enabling them to have control over their assigned resources. The architecture addresses different facets of isolation in a mu...

This document specifies a collaboration agreement protocol. The collaboration agreement makes pos... more This document specifies a collaboration agreement protocol. The collaboration agreement makes possible individual security services functions (SSF) to collaborate with each other. The collaboration is mostly intended for SSF located in different administrative domains, in which case the collaboration cannot be performed by a shared orchestrator. The collaboration between SSF in different domains assumes the traffic is steered through the two domains.

Introduction: COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 increasingly involves ... more Introduction: COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 increasingly involves people worldwide. Probiotics can improve immune system functions via different mechanisms. We proposed that Synbiotic Lactocare? may also reduce SARS-Cov2 infection in high-risk medical staff working in COVID-19 hospital wards. Method: In a randomized, controlled trial, 60 hospital staff without any history of clinical or laboratory evidence of SARS-Cov2 infection were received either once-daily oral synbiotic capsule (Lactocare?) that contains 1 billion CFU/Cap of L. (Lactobacillus) casei, L. rhamnosus, Streptococcus thermophilus, Bifidobacterium breve, L. acidophilus, Bifidobacterium infantis, L. bulgaricus, and Fructooligosacharide (Zist Takhmir, Tehran, Iran) or placebo with the same appearance for 30 days. They were followed for two months. Result: During the two-month period of this study, SARS-COV-2 RT-PCR test results were positive in three participants (9.67%) in placebo group c...

2017 17th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID)

Cloud virtualization technology is shifting towards light-weight containers, which provide isolat... more Cloud virtualization technology is shifting towards light-weight containers, which provide isolated environments for running cloud-based services. The emerging trends such as container-based micro-service architectures and hybrid cloud deployments result in increased traffic volumes between the micro-services, mobility of the communication endpoints, and some of the communication taking place over untrusted networks. Yet, the services are typically designed with the assumption of scalable, persistent and secure connectivity. In this paper, we present the SynAPTIC architecture, which enables secure and persistent connectivity between mobile containers, especially in the hybrid cloud and in multi-tenant cloud networks. The solution is based on the standardized Host Identity Protocol (HIP) that tenants can deploy on top of existing cloud infrastructure independently of their cloud provider. Optional cloud-provider extensions based on Software-Defined Networking (SDN) further optimize the networking architecture. Our qualitative and quantitative evaluation shows that SynAPTIC performs better than some of the existing solutions.

Iranian Journal of Allergy, Asthma and Immunology

In light of various supports of prodigious figures in the field of immunology and allergy, the su... more In light of various supports of prodigious figures in the field of immunology and allergy, the subject area has been faced a great leap during the last century. The current state of the discipline owes an abundant appreciation for the scholars motivated in escalating the true nature of the science, who left no stone unturned in improving the general common sense and understanding of the human knowledge in general, and immunology and allergy in particular. Professor Reza Farid Hosseini is among the dignitaries who invested his life and energy on weaving the tapestry of the immunology and allergy. He delivered a great deal of influence on the field by his ethical devotion to science and was a significant contributor in the realms of the human immune system. His presence drastically rehabilitated the place of the Immunology in Iran, and the current paper seeks to review the personal and academic life of Professor Reza Farid Hosseini in honor and appreciation for his in-depth involvemen...

Iranian Journal of Immunology Iji, Sep 1, 2006

Background: Selenium (Se) is part of the glutathione peroxidase enzyme complex (GSH-PX) that play... more Background: Selenium (Se) is part of the glutathione peroxidase enzyme complex (GSH-PX) that plays an important role in antioxidant mechanisms in body, also it has been demonstrated that populations with low Se intake have 2-3 times greater risk of ischemic heart disease. Objective: To determine the circulating levels of IL- 6, TNF-alpha, Cu, Zn, and Se in patients with chronic coronary artery disease (CCAD), acute myocardial infarction (AMI), and normal individuals. Methods: Patients were divided into two groups: 25 subjects with CCAD and 25 patients with AMI. The control group included 50 normal individuals who did not have any history of ischemic heart disease, and were sex and age matched with the patients. Blood samples were collected during the first hours after the onset of chest pain in AMI group. Serum concentration of Se, Cu, and Zn were determined by atomic absorption spectrometry and TNF-alpha and IL-6 levels were measured using ELISA method. Results: In both groups of patients there was a significant reduction in serum Se levels (82.36 + 11.31 g/L in CCAD, 74.08+11.31g/L in AMI, and 105+32.52g/L in the control group, p=0.03). TNF-alpha titers were increased in AMI patients compared with CCAD and control group. Mean TNF-alpha levels were 37.44 pg/ml in CCAD, 914.32 pg/ml in AMI, and 4.80 pg/ml in the control group (p=0.01). Serum levels of IL-6 in CCAD and AMI patients were 3.28 15.55 pg/ml and 472207.88 pg/ml, respectively, and 1.28 pg/ml in the control group (p=0.001). Conclusion: These findings confirm previous studies and demonstrate that patients suffering from AMI exhibit lower plasma concentrations of Se and higher concentrations of pro-inflammatory cytokines of TNF-alpha and IL-6.

Influenza has remained a serious widespread threat to the human and animal population. Vaccinatio... more Influenza has remained a serious widespread threat to the human and animal population. Vaccination is the best prophylactic strategy for controlling the influenza infection. The current licensed vaccines (i.e. synthetic virus-like particles, inactivated or live-attenuated whole virus, split and subunit vaccines) are based on the immune response against

Journal of Allergy and Clinical Immunology, 2004

RationaleAsthma is a very complex disease whose cause remains unknown. Little is known about the ... more RationaleAsthma is a very complex disease whose cause remains unknown. Little is known about the possible mechanism of selenium at more basic layers of the pathogenesis of allergic disorders.

$Research paper thumbnail of Fuzzy fractional order sliding mode controller for nonlinear systems$

... a, Babol (Noushirvani) University of Technology, Faculty of Electrical and Computer Engineeri... more ... a, Babol (Noushirvani) University of Technology, Faculty of Electrical and Computer Engineering, PO Box 47135-484, Babol, Iran. b, Department of Mathematics, Mutah University, Al-Karak, Jordan. Received 23 April 2009; revised 7 May 2009; Accepted 7 May 2009. ...

$Research paper thumbnail of Application of the enhanced homotopy perturbation method to solve the fractional-order Bagley–Torvik differential equation$

The enhanced homotopy perturbation method (EHPM) is applied for finding improved approximate solu... more The enhanced homotopy perturbation method (EHPM) is applied for finding improved approximate solutions of the well-known Bagley-Torvik equation for three different cases. The main characteristic of the EHPM is using a stabilized linear part, which guarantees the stability and convergence of the overall solution. The results are finally compared with the Adams-Bashforth-Moulton numerical method, the Adomian decomposition method (ADM) and the fractional differential transform method (FDTM) to verify the performance of the EHPM.

In this paper a new linearization procedure based on Homotopy Perturbation Method (HPM) will be p... more In this paper a new linearization procedure based on Homotopy Perturbation Method (HPM) will be presented. The procedure begins with solving nonlinear differential equation by HPM. This will be done by evaluation of the time response of a nonlinear dynamic. An equivalent Laplace transform of the time response will be obtained. In the preceding, the effect of an external excitation i.e. input, will be removed from the model to find an approximate linear model for the nonlinear dynamic. The effectiveness of the procedure is verified using a heat transfer nonlinear equation. Ultimately, both HPM based linear model and that of nonlinear have been controlled via a closed loop PID controller. The simulation result shows the significance of the proposed technique.

In this work, a systematic study on the fabrication of Mg-Ni hydrogen storage materials is presen... more In this work, a systematic study on the fabrication of Mg-Ni hydrogen storage materials is presented. Mg-6 wt% Ni base alloys were fabricated by a melting and casting process, and then ball milled by planetary ball milling. As a comparison, a sample of Mg + 6 wt% Ni was also prepared by ball milling pure elemental powders. X-ray diffraction patterns of the cast and ball-milled (BM)-cast samples show the existence of both Mg and Mg 2 Ni phases, while in the BM-powder sample there are some peaks corresponding to Ni particles. Hydrogen sorption properties of the samples were measured at 200 • C and 250 • C. The thermodynamic behaviour of hydrogenated samples was also investigated by differential scanning calorimetry. The ball-milled samples show enhanced hydrogen sorption properties in comparison with the cast samples, and ball-milling after casting results in superior hydrogen absorption/desorption properties in comparison with the ball-milled powder. Our discussion demonstrates that by ball-milling after casting, the Ni particles can penetrate into the deeper layers of magnesium particles and show a combination of the catalytic roles in terms of both hydrogen dissociation and hydrogen pumping to the interface between the catalyst and the Mg.

A LiAlH 4 /single walled carbon nanotube (SWCNT) composite system was prepared by mechanical mill... more A LiAlH 4 /single walled carbon nanotube (SWCNT) composite system was prepared by mechanical milling and its hydrogen storage properties investigated. The SWCNT e metallic particle addition resulted in both a decreased decomposition temperature and enhanced desorption kinetics compared to pure LiAlH 4. The decomposition temperature of the 5 wt.% SWCNT-added LiAlH 4 sample was reduced to 80 C and 130 C for the first and second stage, respectively, compared with 150 C and 180 C for as-received LiAlH 4. In terms of the desorption kinetics, the 5 wt.% SWCNT-added LiAlH 4 sample released about 4.0 wt.% hydrogen at 90 C after 40 min dehydrogenation, while the as-milled LiAlH 4 sample released less than 0.3 wt.% hydrogen for the same temperature and time. Differential scanning calorimetry measurements indicate that enthalpies of decomposition in LiAlH 4 decrease with added SWCNTs. The apparent activation energy for hydrogen desorption was decreased from 116 kJ/mol for as-received LiAlH 4 to 61 kJ/mol by the addition of 5 wt.% SWCNTs. It is believed that the significant improvement in dehydrogenation behaviour of SWCNT-added LiAlH 4 is due to the combined influence of the SWCNT structure itself and the catalytic role of the metallic particles contained in the SWCNTs. In addition, the different effects of the SWCNTs and the metallic catalysts contained in the SWCNTs were also investigated, and the possible mechanism is discussed.

Abstract and Applied Analysis, 2010

Fractional calculus techniques and methods started to be applied successfully during the last dec... more Fractional calculus techniques and methods started to be applied successfully during the last decades in several fields of science and engineering. In this paper we studied the stability of fractional-order nonlinear time-delay systems for Riemann-Liouville and Caputo derivatives and we extended Razumikhin theorem for the fractional nonlinear time-delay systems.