A NEW MAPPING FOR FINDING A COMMON SOLUTION OF SPLIT GENERALIZED EQUILIBRIUM PROBLEM, VARIATIONAL INEQUALITY PROBLEM AND FIXED POINT PROBLEM

Farid, Mohammad,Kazmi, Kaleem Raza The Kangwon-Kyungki Mathematical Society 2019 한국수학논문집 Vol.27 No.2

In this paper, we introduce and study a general iterative algorithm to approximate a common solution of split generalized equilibrium problem, variational inequality problem and fixed point problem for a finite family of nonexpansive mappings in real Hilbert spaces. Further, we prove a strong convergence theorem for the sequences generated by the proposed iterative scheme. Finally, we derive some consequences from our main result. The results presented in this paper extended and unify many of the previously known results in this area.

Creep analysis of adhesively bonded single lap joint using finite element method

Mohammad Zehsaz,Farid Vakili-Tahami,Mohammad-Ali Saeimi-Sadigh 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.7

Adhesive joints are being used widely in engineering industries due to the increasing demand for designing lightweight structures. Becauseof the physical properties of the most adhesives, they creep even at room temperature. Therefore, the creep behavior of a single lapadhesive joint is studied in this paper. For this purpose, using the experimental data, creep constitutive equations for the adhesive hasbeen obtained. Then, these equations have been employed to investigate the creep behavior of the joint. The results show that due to thecreep straining, the stresses in the joint corners, decrease. However, creep strain accumulates in these areas which this in turn may lead toseparation of adhesive from adherent. In order to eliminate the effect of strain accumulation, two modifying methods have been proposedin this paper: increasing the layer thickness and using filleted joints.

Sensitive High-Resolution Melting Analysis for Screening of KRAS and BRAF Mutations in Iranian Human Metastatic Colorectal Cancers

Niya, Mohammad Hadi Karbalaie,Basi, Ali,Koochak, Aghigh,Tameshkel, Fahimeh Safarnezhad,Rakhshani, Nasser,Zamani, Farhad,Imanzade, Farid,Rezvani, Hamid,Adib sereshki, Mohammad Mahdi,Sohrabi, Masoud Rez Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.12

Background: Investigations of methods for detection of mutations have uncovered major weaknesses of direct sequencing and pyrosequencing, with their high costs and low sensitivity in screening for both known and unknown mutations. High resolution melting (HRM) analysis is an alternative tool for the rapid detection of mutations. Here we describe the accuracy of HRM in screening for KRAS and BRAF mutations in metastatic colorectal cancer (mCRCs) samples. Materials and Methods: A total of 1000 mCRC patients in Mehr Hospital, Tehran, Iran, from Feb 2008 to May 2012 were examined for KRAS mutations and 242 of them were selected for further assessment of BRAF mutations by HRM analysis. In order to calculate the sensitivity and specificity, HRM results were checked by pyrosequencing as the golden standard and Dxs Therascreen as a further method. Results: In the total of 1,000 participants, there were 664 (66.4%) with wild type and 336 (33.6%) with mutant codons 12 and/or 13 of the KRAS gene. Among 242 samples randomly checked for the BRAF gene, all were wild type by HRM. Pyrosequencing and Dxs Therascreen results were in line with those of the HRM. In this regard, the sensitivity and specificity of HRM were evaluated as 100%. Conclusion: The findings suggest that the HRM, in comparison with DNA sequencing, is a more appropriate method for precise scanning of KRAS and BRAF mutations. It is also possible to state that HRM may be an attractive technique for the detection of known or unknown somatic mutations in other genes.

A New Reliable Algorithm for Identifying Types of Partial Discharge Detected through Ultrasonic Emission

Mohammad Shukri Hapeez,Ngah Ramzi Hamzah,Habibah Hashim,Ahmad Farid Abidin 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.1

This paper presents a simple, consistent and reliable technique to identify detected partial discharges (PD) using an acoustic ultrasonic method. A new reliable algorithm named ‘Simple Partial Discharge Identifier’ (SPDI) is proposed to perform identification process of the detected ultrasonic signals of PD. Experimental works based on recommended practices were setup and the ultrasonic signals of the PD were recorded. The PD data is then employed as the reference data. The SPDI developed has been tested against commonly used models in Neural Network (NN). Results from the SPDI algorithm shows more reliable results compared to NN models results. Comparison made on the mean square error (MSE) results shows SPDI produces the desired outcome with lower MSE in 97.17% of trials. Low error of SPDI indicates a high reliability to be applied in the identification of PD.

Restoration of degraded forest ecosystem through non-forestry livelihood supports: experience from the Chunati Wildlife Sanctuary in Bangladesh

Mohammad Mahfuzur Rahman,Md. Abdullah Al Mahmud,Farid Uddin Ahmed 한국산림과학회 2017 Forest Science And Technology Vol.13 No.3

Lack ofnon-forestry incomesources for the forest-dependent community was oneof the major causes of continued biodiversity loss in Chunati Wildlife Sanctuary (CWS). A livelihood support program was implemented from July 2012 through June 2015 to reduce people’s forest-dependence for their livelihoods. We evaluated the efficacy of this program in enhancing the biodiversity health of CWS. An Ordinary Least Square regression framework was used to estimate the difference in difference of the income between the control and the treatment households. Alongside, the biodiversity attributes of the CWS were measured in 2012 and 2015 and were compared. The intervention increased a treatment household’s monthly non-forestry income by BDT11,781 and decreased its monthly forest income by BDT2128. In contrast, with increased natural regeneration of 8.43%, 12 out of the 16 major species at CWS showed increased importance value index (IVI). The IVI increased by 48.03% for Acacia auriculiformis and decreased by 56.30% and 31.76% for Dipterocarpus turbinatus and Tectona grandis, respectively. As confirmed by the households, this biodiversity improvement could be attributed to the livelihood intervention program at CWS. Continued monitoring is important to sustain the successes of the program.

Validity of Self-reported Hypertension and Factors Related to Discordance Between Self-reported and Objectively Measured Hypertension: Evidence From a Cohort Study in Iran

Farid Najafi,Yahya Pasdar,Ebrahim Shakiba,Behrooz Hamzeh,Mitra Darbandi,Mehdi Moradinazar,Jafar Navabi,Bita Anvari,Mohammad Reza Saidi,Shahrzad Bazargan-Hejazi 대한예방의학회 2019 Journal of Preventive Medicine and Public Health Vol.52 No.2

Objectives: Self-reporting can be used to determine the incidence and prevalence of hypertension (HTN). The present study was conducted to determine the validity of self-reported HTN and to identify factors affecting discordance between self-reported and objectively measured HTN in participants in the Ravansar Non-Communicable Diseases (RaNCD) cohort. Methods: The RaNCD cohort included permanent residents of Ravansar, Iran aged 35-65 years. Self-reported data were collected before clinical examinations were conducted by well-trained staff members. The gold standard for HTN was anti-hypertensive medication use and blood pressure measurements. The sensitivity, specificity, positive and negative predictive values, and overall accuracy of self-reporting were calculated. Univariate and multivariate logistic regression were used to examine the discordance between self-reported HTN and the gold standard. Results: Of the 10 065 participants in the RaNCD, 4755 (47.4%) were male. The prevalence of HTN was 16.8% based on self-reporting and 15.7% based on medical history and HTN measurements. Of the participants with HTN, 297 (18.8%) had no knowledge of their disease, and 313 (19.9%) had not properly controlled their HTN despite receiving treatment. The sensitivity, specificity, and kappa for self-reported HTN were 75.5%, 96.4%, and 73.4%, respectively. False positives became more likely with age, body mass index (BMI), low socioeconomic status, and female sex, whereas false negatives became more likely with age, BMI, high socioeconomic status, smoking, and urban residency. Conclusions: The sensitivity and specificity of self-reported HTN were acceptable, suggesting that this method can be used for public health initiatives in the absence of countrywide HTN control and detection programs.

Investigating the possibility of replacing IN 738LC gas turbine blades with IN 718

Farid Vakili-Tahami,Mohammad Reza Adibeig 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.10

The possibility of replacing IN 738LC gas turbine blades with IN 718 is investigated in terms of their creep behavior at different workingconditions. The latter superalloy is domestically produced and therefore there is a strong interest in using this alloy in manufacturinggas turbine blades. For this purpose, first the creep behavior and constitutive equation of IN 718 have been determined using experimentaldata. Test samples were machined from as-received bars and their physical and mechanical properties together with their creep behaviorwere examined. Constant load uni-axial creep tests were carried out at two constant temperatures of 660 and 675°C. Initial stressesrange from 490 to 690 MPa that are below the yield stress at each temperature level. The test results verify the quality of the domesticallyproduced superalloy and show that its characteristics match with the international standards. In addition, numerical optimization techniqueswere used to obtain creep constitutive parameters of the produced alloy based on the experimental data. Then, the creep behaviorof gas turbine blades, which operate at different rotating speeds, was investigated using finite element method. The results show thatsince the creep deformation of IN 718 is high, it can only be used in low and medium power gas turbines.

Analysis of the hydrodynamic torque effects on large size butterfly valves andcomparing results with AWWA C504 standard recommendations

Farid Vakili-Tahami,Mohammad Zehsaz,Mahdi Mohammadpour,Ali Vakili-Tahami 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.9

Butterfly valves are widely used in various industries such as water distribution, sewage, oil and gas plants. The hydrodynamic torque applied on the butterfly valve disk is one of the most important factors which should be considered in their design and application. Although several methods have been used to calculate the total torque on these valves, most of them are based on hydrostatic analysis and ignore the hydrodynamic effect which has a major role to determine the torque of the large-size valves. For finding the dynamic-valvetorque,some empirical formulas and methods have been proposed; for example in AWWA C504 standard, a relationship for calculating the dynamic torque has been given and its variation versus disk angle has been stated. However, the use of these empirical relationships is restricted due to the conditions defined in the standards. In this paper, the dynamic-valve-torque has been calculated for a large butterfly valve under different conditions and also at the different opening angles of the valve disk. For this purpose a computational fluid dynamics (CFD) method has been used. The results have been compared with those given in the AWWA C504 standard recommendations. Moreover, the effects of the disk shape and its deformation, surface roughness, upstream/downstream pressure variation and disk-offset value have been studied.

Proposing a Algorithm for Finding Repetitive Patterns in Web Dataflow

Mohammad Rostami,Somayyeh Ehteshami,Fatemeh Yaghoobi,Farid Saghari,Samaneh Dezhdar 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.7

Today, searching repetitive patterns on data flows is very important. By data flow we mean a type of data which is constantly produced in a very fast and unlimited manner. As a kind of these data we can name the report of clicks in computer networks. A repetitive pattern is a pattern which is available in a significant number of transactions. Finding repetitive patterns in data flows is a new and arguable issue in data mining as data is received in form of fast and continuous flow. Unlike static databases, flow mining faces a lot of problems including single review, requiring unlimited memory and high rate of input data. A common way of searching repetitive patterns is the excess check of data which requires to be saved in memory. In addition, according to the features of data flows i.e. unlimited and fast production, it is not possible to save them in memory and hence techniques are needed which are able to process them online and find repetitive patterns. One of the most popular relative techniques is using sliding windows. It’s advantage is reduction of the consumed memory and increase in search speed. In this paper, a new vertical display and an algorithm based on pins, called DBP-BA, are proposed to find repetitive patters in data flows. Since this new display without any additional task has a compact form, the proposed algorithm has a better performance than similar ones in terms of consumed memory and processing time. On the other hand, experiments support this matter.

Treatment of Traumatic Direct Carotid-Cavernous Fistula with a BeGraft-Covered Stent

Seraj Farid Qoorchi Moheb,Najafi Sajjad,Raaisi Amira Al,Mirbolouk Mohammad Hossein,Ebrahimnia Feizollah,Shamsi Hashem Pahlavan,Garivani Yousef,Zabihyan Samira,Mowla Ashkan,Baharvahdat Humain 대한신경중재치료의학회 2024 Neurointervention Vol.19 No.2

The widely accepted option for treating traumatic direct carotid-cavernous fistula (dCCF) has been endovascular treatment using detachable balloons, coils, or embolic agents. Covered stent deployment has been applied by a few operators and has shown promising results. This is a retrospective study on patients with dCCF treated by an endovascular approach using BeGraft, a covered stent. In 4 cases, this device was successfully deployed without any complications. Immediate complete occlusion was achieved in 3 patients (75%) after deployment of the covered stents. One patient required transvenous coiling for occlusion of the remaining endoleak. Follow-up imaging demonstrated 100% fistula occlusion with complete internal carotid artery patency. No early or late complications occurred following treatment. In conclusion, the BeGraft-covered stent could be a promising safe and effective alternative option for the endovascular treatment of dCCF.