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Using Submerge Fermentation Method To Production Of Extracellular Lipase By Aspergillus Niger

Masoumeh Ghasemi, Afshin Farahbakhsh, Arman Farahbakhsh, Ali Asghar Safari
2014 Zenodo  
Method of Designing Experiment In this study, the optimum process conditions for lipase Masoumeh Ghasemi, Afshin Farahbakhsh, Arman Farahbakhsh, Ali Asghar Safari Using Submerge Fermentation Method  ...  Farahbakhsh is with the Department of Chemical Engineering, Quchan branch, Islamic Azad University, Quchan, Iran (e-mail: afshin.farahbakhsh@gmail.com). A.  ... 
doi:10.5281/zenodo.1096038 fatcat:quc2hgqzlvbxdd5rxnlsxe3m2m

Dissecting the Performance of Chained-BFT [article]

Fangyu Gai, Ali Farahbakhsh, Jianyu Niu, Chen Feng, Ivan Beschastnikh, Hao Duan
2021 arXiv   pre-print
Permissioned blockchains employ Byzantine fault-tolerant (BFT) state machine replication (SMR) to reach agreement on an ever-growing, linearly ordered log of transactions. A new paradigm, combined with decades of research in BFT SMR and blockchain (namely chained-BFT, or cBFT), has emerged for directly constructing blockchain protocols. Chained-BFT protocols have a unifying propose-vote scheme instead of multiple different voting phases with a set of voting and commit rules to guarantee safety
more » ... nd liveness. However, distinct voting and commit rules impose varying impacts on performance under different workloads, network conditions, and Byzantine attacks. Therefore, a fair comparison of the proposed protocols poses a challenge that has not yet been addressed by existing work. We fill this gap by studying a family of cBFT protocols with a two-pronged systematic approach. First, we present an evaluation framework, Bamboo, for quick prototyping of cBFT protocols and that includes helpful benchmarking facilities. To validate Bamboo, we introduce an analytic model using queuing theory which also offers a back-of-the-envelope guide for dissecting these protocols. We build multiple cBFT protocols using Bamboo and we are the first to fairly compare three representatives (i.e., HotStuff, two-chain HotStuff, and Streamlet). We evaluated these protocols under various parameters and scenarios, including two Byzantine attacks that have not been widely discussed in the literature. Our findings reveal interesting trade-offs (e.g., responsiveness vs. forking-resilience) between different cBFT protocols and their design choices, which provide developers and researchers with insights into the design and implementation of this protocol family.
arXiv:2103.00777v1 fatcat:gyaslwyeajfivg7ixqdjlvtw5m

Opportunistic Routing in Quantum Networks [article]

Ali Farahbakhsh, Chen Feng
2022 arXiv   pre-print
Unlike classical routing algorithms, quantum routing algorithms make use of entangled states - a type of resources that have a limited lifetime and need to be regenerated after consumption. In a nutshell, quantum routing algorithms have to use these resources efficiently, while optimizing some objectives such as the total waiting time. Current routing algorithms tend to keep a routing request waiting until all of the resources on its path are available. In this paper, we introduce a new way of
more » ... anaging entanglement resources in an opportunistic fashion: a request can move forward along its path as soon as possible (even if some resources on its path are not ready). We show that this opportunistic approach is fundamentally better than conventional approaches. In particular, our results indicate that this new approach achieves a 30-50% improvement in the average total waiting time and average link waiting time compared with several state-of-the-art routing algorithms. As a by-product of this work, we develop a new simulator for quantum routing, which can be used to evaluate various design choices under different scenarios.
arXiv:2205.08479v3 fatcat:3sbinaiw4nchdiubycf6jj43wq

Personality patterns and Smoking behavior among students in Tabriz, Iran

Ali Fakharri, Ali Jahani, Homayoun Sadeghi-Bazargani, Mostafa Farahbakhsh, Asghar Mohammadpour Asl
2017 Electronic Physician  
Psychological factors have always been considered for their role on risk taking behavior such as substance abuse, risky driving and smoking. The aim of this study was to determine the association between smoking behavior and potential personality patterns among high school students in Tabriz, Iran. Methods: Through a multistage sampling in a cross-sectional study, 1000 students were enrolled to represent the final grade high school student population of Tabriz, Iran in 2013. The personality
more » ... erns along with smoking status and some background information were collected through standard questionnaires along with Millon Clinical Multiaxial Inventory-III (MCMI-III). Fourteen personality patterns and ten clinical syndromes. ANOVA and Kruskal Wallis tests were used to compare numeric scales among the study participants, with respect to their smoking status. Stata version 13 statistical software package was used to analyze the data. Multivariate logistic regression was used to predict likelihood of smoking by personality status. Results: Two logistic models were developed in both of whom male sex was identified as a determinant of regular smoking (1 st model) and ever-smoking (2 nd model). Depressive personality increased the likelihood of being a regular smoker by 2.8 times (OR=2.8, 95% CI: 1.3-6.1). The second personality disorder included in the model was sadistic personality with an odds ratio of 7.9 (96% CI: 1.2-53%). Histrionic personality increased the likelihood of experiencing smoking by 2.2 times (OR=2.2, 95% CI: 1.6-3.1) followed by borderline personality (OR=2.8, 95% CI: 0.97-8.1). Conclusion: Histrionic and depressive personalities could be considered as strong associates of smoking, followed by borderline and sadistic personalities. A causal relationship couldn't be assumed unless well controlled longitudinal studies reached the same findings using psychiatric interviews.
doi:10.19082/3950 pmid:28461869 pmcid:PMC5407227 fatcat:lhctdhalqbd2jc7rwyen4snkve

Neck pain and low back pain in relation to functional disability in different sport activities

Farzin Farahbakhsh, Maryam Akbari-Fakhrabadi, Ardalan Shariat, Joshua A. Cleland, Farbod Farahbakhsh, Tohid Seif-Barghi, Mohammad Ali Mansournia, Mohsen Rostami, Ramin Kordi
2018 Journal of Exercise Rehabilitation  
This population-based, cross-sectional study aimed to determine the frequency of neck pain, low back pain (LBP) and also the LBP related functional disability in five sport categories including football, volleyball, basketball, wrestling, and other sports in one of the Iranian sport Olympiads. The prevalence of neck pain and LBP in different time points was evaluated with the use of an interview questionnaire. A visual analogue scale was used to evaluate the athlete's current pain. Furthermore,
more » ... the functional disability related to LBP was assessed by the Athletes Disability Index Questionnaire (ADI). A total of 452 male athletes aging between 12 and 20 were screened. Three hundred seventy-seven participants responded to the questionnaires in which their mean age (standard deviation) was 15.95 (1.25). Collectively, the life-time prevalence of neck pain and LBP in all the athletes was 38.8% and 42.0%, respectively. The highest risk of neck pain at all-time points was observed among basketball players compared to other sport groups (P< 0.05). The risk of LBP in most time points was the least among wrestlers (P< 0.05). The ADI score was significantly higher among basketball players (13.89%) compared to volleyball players and wrestlers (P < 0.05). Our study revealed a high prevalence of neck pain and LBP among Iranian young male athletes. A higher risk of neck pain and LBP among basketball players predisposes this sport at high risk of developing spine injuries which needs further consideration.
doi:10.12965/jer.1836220.110 pmid:30018941 pmcid:PMC6028206 fatcat:rfc4xcksynev5drwtwowcflmgq

Technique for inversion of an inhomogeneous bianisotropic slab through an optimisation approach

Ali Farahbakhsh, Ali Abdolali, Mohammad Soleimani, Davoud Zarifi
2013 IET Microwaves, Antennas & Propagation  
An electromagnetic inversion method is presented to reconstruct the constitutive parameters of an inhomogeneous bianisotropic slab. The measured co-and cross-reflection and transmission coefficients are used to extract the electromagnetic parameters profiles of the inhomogeneous bianisotropic media from the proposed method, using truncated Fourier series expansion and Gravitational Search Algorithm (GSA). GSA is used to improve the speed and accuracy of the optimisation process because of the
more » ... mplexity of inhomogeneous bianisotropic media, highly non-linearity of optimisation problem, and extremely large search space. Finally, the accuracy and robustness of the proposed reconstruction method are validated using some typical examples.
doi:10.1049/iet-map.2012.0553 fatcat:h4jmjd7ut5hxnpientdwbuf7hu

RECONSTRUCTING CONSTITUTIVE PARAMETERS OF INHOMOGENEOUS PLANAR LAYERED CHIRAL MEDIA BASED ON THE OPTIMIZATION APPROACH

Davoud Zarifi, Ali Farahbakhsh, Ali Abdolali, Mohammad Soleimani
2013 Progress In Electromagnetics Research M  
Farahbakhsh, A., S. Tavakoli, and A.  ... 
doi:10.2528/pierm12121702 fatcat:vibaje6narh3rel7okessd4t4m

Severe angina pectoris in asthma attack: a case report

Seyed Hesamedin Nabavizadeh, Nazanin Farahbakhsh, Ali Fazel, Fereshteh Mosavat, Amir Anushiravani
2016 Electronic Physician  
Asthma is a chronic inflammatory disorder of the airways related to the obstruction of reversible airflow. Asthma presents as recurrent attacks of cough and dyspnea. Poor control causes recurrent admissions to the ICU, and mortality is related to poor drug compliance and follow-up. Angina pectoris is a syndrome of recurrent chest discomfort related to myocardial ischemia. The presence of these two disorders rarely has been reported. We reported a 12-year-old boy who was referred with
more » ... n of asthma and developed angina pectoris during hospitalization. He had labored breathing and diffuse wheezing. During treatment of the asthma, the patient developed severe chest pain due to shunt formation and coronary hypoxia, caused by the sole administration of ventolin, since oxygen had been disconnected. After receiving appropriate therapy, both his asthma and angina recovered, and, to date, he has not experienced angina pectoris again.
doi:10.19082/2591 pmid:27504177 pmcid:PMC4965212 fatcat:sgcfvmbd6rbtndpwigowty462m

DESIGN OF NONUNIFORM METALLIC ANECHOIC CHAMBER FOR RADIATION PATTERN MEASUREMENT

Ali Farahbakhsh, Mohammad Khalaj-Amirhosseini
2017 Progress In Electromagnetics Research M  
Antenna pattern measurement is an essential step in antenna qualification which should be done in anechoic chambers. The common method for construction of the anechoic chamber is to cover all inside walls by the electromagnetic absorbers. In this paper, a new method is presented to design a fully metallic chamber by controlling the electromagnetic wave propagation inside the chamber and guiding them to a piece of absorber. Therefore, a desirable quiet zone is formed inside the chamber while a
more » ... eat reduction of absorber usage is achieved. The proposed chamber is analyzed using ray tracing method, and its performance is evaluated by simulation which shows the practicality of the proposed chamber.
doi:10.2528/pierm17050701 fatcat:4eb3bfvb3vcbtbmxfvpthvgzjm

Urea biosensor based on immobilization of urease on ZnO nanoparticles

Mostapha Eghbali, Afshin Farahbakhsh, Aliasghar Rohani, Ali Pour
2015 Oriental Journal of Chemistry  
doi:10.13005/ojc/310284 fatcat:qmtm5yjvara5plc2o2qiapoluu

Design a low mutual coupling microstrip array antenna with non regular polygonal patches

Ali Farahbakhsh, Gholamreza Moradi
2010 IEICE Electronics Express  
This paper presents a new method to design microstrip array antennas. In this method, non-regular polygonal patches are used and their shapes are determined by genetic algorithm (GA) depending on the design needs. The positions of patch vertexes are optimized by GA. Connecting the vertexes with an incorrect order yields to an invalid patch which its edges intersect themselves. So, ant colony optimization (ACO) is used to find correct connection order of vertexes. This method is used to design
more » ... array antenna with low amount of return loss and mutual coupling. Finally, design procedure is verified by simulation.
doi:10.1587/elex.7.1271 fatcat:t2vnm32bibevzok7crks6devha

The effect of ketamine on preventing postpartum depression

Mina Alipoor, Marzeyeh Loripoor, Majid Kazemi, Farshid Farahbakhsh, Ali Sarkoohi
2021 Journal of Medicine and Life  
Postpartum depression is a common disabling psychosocial disorder that could have adverse effects on the life of the mother, infant, and family. The present study was conducted to evaluate the effect of ketamine on preventing postpartum depression in women undergoing caesarian sections considering the relatively known positive effect of ketamine on major depression. The present double-blind, randomized clinical trial was conducted on 134 women undergoing scheduled caesarian sections.
more » ... s were randomly allocated into two groups of control and intervention. To induce anesthesia, 1-2 mg/kg of body weight of Nesdonal and 0.5 mg/kg of body weight of ketamine were used in the intervention group, while only 3-5 mg/kg of body weight Nesdonal was administered in the control group. Data were gathered using the Edinburgh Postnatal Depression Scale (EPDS) in three stages: before the caesarian section and two and four weeks after the caesarian section. Data were analyzed using variance analysis with repeated measures and the Chi-square test. Results of the present study showed that the mean (± standard deviation) of the depression score in the intervention and control groups were 13.78±3.87 and 13.79±4.78(p = 0.98) before the caesarian section, 11.82±3.41 and 14.34±4.29 (p < 0.001) two weeks after and 10.84±3.48 and 13.09±3.79 (p = 0.001) four weeks after the caesarian section, respectively. Using ketamine in the induction of general anesthesia could be effective in preventing postpartum depression. However, further studies are required to strengthen these findings.
doi:10.25122/jml-2020-0116 pmid:33767791 pmcid:PMC7982256 fatcat:fslcs6t23jb7rjx6f22czsi7aa

Dual band microstrip antenna with non regular polygonal patch for satellite applications

Mohammad Mosalanejad, Ali Farahbakhsh, Gholamreza Moradi
2012 IEICE Electronics Express  
In this paper, a new method for designing dual band microstrip antenna is presented. This method can be used to design any dual band microstrip patch antenna with arbitrary resonant frequencies and different frequency ratios. In this method, non-regular polygonal patch is used to design dual band microstrip antenna and particle swarm optimization (PSO) technique and ant colony optimization (ACO) are used to optimize the shape of the patch antenna. This method is used to design a dual band
more » ... trip antenna for satellite application, which has resonant frequencies at 8.6 and 13 GHz.
doi:10.1587/elex.9.1290 fatcat:kcloc4qsmzbqzdgohvmsvre3ve

A 12-20 GHz Wideband High-Power SP2T Switch Based on Gap Waveguide Technology

Abdullah J. Alazemi, Ali Farahbakhsh, Davoud Zarifi
2021 Sensors  
A novel wideband high-power single-pole two-throw (SP2T) switch based on gap waveguide technology is presented in this article. The proposed switch has a SP2T structure and consists of three standard WR62 waveguide ports. Due to the advantage of gap waveguide technology, the switch design structure requires no electrical contact between its different parts, and the leakage of the electromagnetic wave is suppressed. The proposed switch has an air gap between its parts. As a result, the sliding
more » ... rt of the switch can be moved freely to change the switch states. Consequently, a low-precision and low-cost fabrication can be utilized. The simulation and measurement of the proposed switch indicate that a 50% operating frequency bandwidth covering the range of 12-20 GHz can be achieved. The switch input return-loss is better than 15 dB within the frequency bandwidth, whereas the insertion loss and isolation levels of the proposed design are above 0.15 dB and better than 65 dB, respectively.
doi:10.3390/s21165396 pmid:34450838 pmcid:PMC8399977 fatcat:jzdp4clnwjetxkm45n5xvto3eu

A descriptive study of agoraphobic situations and correlates on panic disorder

Habibeh Barzegar, Mostafa Farahbakhsh, Hosein Azizi, Sepideh Aliashrafi, Hossein Dadashzadeh, Ali Fakhari
2021 Middle East Current Psychiatry  
Background We aimed to identify the distribution and effective factors of agoraphobic situations and how they relate to panic disorder. We included confirmed 61 patients with agoraphobia in Bozorgmehr Psychiatric Clinic of Tabriz. Multiple logistic regression was used to measure panic disorder, agoraphobia, and effective factors. Results The average age of participants was 37.26 (SD 10.9), including 68.85% female and 31.15% male. Out of those, around three-fourths, 45 (73.7%), had panic
more » ... or comorbidity at least by one psychiatric disorder. Among various types of agoraphobia situations, leaving 34.63% and being 32.63% home alone had the most occurrences. A trend was observed between the rising of agoraphobia situations and panic risk. The final analysis was found a significant relationship between being bathroom alone (OR = 1.3; CI 1.12–1.56), having more than one psychiatric disorder (AOR = 8.25; CI 1.12–27.17), and panic risk. Conclusions We found leaving home alone, being home alone, being in a crowd, and standing in line as the most common agoraphobic situations. There appears agoraphobia and panic disorders are poorly understood in primary mental health care systems. The screening and treating programs are needed for increasing the quality of life and early identification of these disorders.
doi:10.1186/s43045-021-00110-y fatcat:r2g2ehuyqngafozv3ccpi7m5qu
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