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Search Results: 1 - 10 of 149 matches for " Somayyeh Shamsi "
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An improved symmetric SOR iterative method for augmented systems
Davod Khojasteh Salkuyeh,Somayyeh Shamsi,Amir Sadeghi
Tamkang Journal of Mathematics , 2012, DOI: 10.5556/j.tkjm.43.2012.479-490
Abstract: In this paper, the improved symmetric SOR (ISSOR) iterative method is introduced to solve augmented systems. Convergence properties of the proposed method are studied. Some numerical experiments of the ISSOR method are given to compare with that of the well-known SOR-like and MSSOR methods.
An Intelligent Assessment Tool for Students’ Java Submissions in Introductory Programming Courses  [PDF]
Fatima Al Shamsi, Ashraf Elnagar
Journal of Intelligent Learning Systems and Applications (JILSA) , 2012, DOI: 10.4236/jilsa.2012.41006
Abstract: This paper presents a graph-based grading system for Java introductory programming courses, eGrader. This system grades submission both dynamically and statically to ensure a complete and through grading job. While dynamic analysis is based on JUnit framework, the static analysis is based on the graph representation of the program and its quality which is measured by software metrics. The graph representation is based on the Control Dependence Graphs (CDG) and Method Call Dependencies (MCD). eGrader outperforms existing systems in two ways: the ability of grading submission with semantic-errors, effectively, and generating reports for students, as a feedback on their performance, and instructors on the overall performance of the class. eGrader is well received by instructors not only for saving time and effort but also for its high success rate that is measured by four performance indicators which are sensitivity (97.37%), specificity (98.1%), precision (98.04%) and accuracy (97.07%).
Measuring Health Belief Model Constructs in Preventive Behavior about Self-Medication in Pregnant Women in Arak City
M Shamsi
Qom University of Medical Sciences Journal , 2012,
Abstract: Background and Objectives: Nowadays, the use of educational models to determine the causes of rejection of health-related behaviors has been on theincrease. Health belief model is one of the models during the past years has been considered. Therefore, the aim of this study was to measure health belief model constructs in preventive behavior about self-medication in pregnant women in the city of Arak. Methods: Thisanalytical, cross-sectional study was carried out on 200 pregnant women having referred to health centers in Arak city. Data collection was based on the Health Belief Model (susceptibility, severity, perceived benefits and barriers, cues to action) and the checklist of self efficacy and practice mothers about self-medication. Data were collected from organized interviews and finally analyzed using descriptive statistical tests such as Pearson correlation. Results: In this research the mean age of subjects studied was found to be 28.15±4.25 years and the mean duration of pregnancy was 7.2±4.6 weeks. Moreover the findings showed that there was a reverse relationship between self-medication measures by the mothers under study and perceived barriers sensitivity, severity, benefits and perceived self efficacy. Conclusion: Based on the results of this study, health belief model constructs in pregnant women who practice self-medication have low precision. Therefore, a training program based on health belief model is strongly recommended in order toenhance sensitivity and perceived severity in pregnant women to their health and self-medication and also increase their self efficacy and perceived benefits with a reduction of perceived barriers
On-line Survival Analysis of Power Electronic Converters Using Step Noise-Cox Processes
Pourya Shamsi
Computer Science , 2015,
Abstract: This paper is focused on survival analysis of electrical components. The main goal of this paper is to develop a method for on-line estimation of the Mean Time To Failure (MTTF) of electrical components under dynamic stress levels. The proposed method models the variations of the stress levels as a stochastic process. Hence, a stochastic failure rate function can be developed for each electrical component. Later, this function is used as the underlying rate of a doubly stochastic Poisson process (known as Cox processes). Furthermore, this Cox process is used for on-line estimation of the Mean Residual Life (MRL) using the observed stress levels. The proposed method provides a good estimate of the age and life expectancy of each component. An experimental case study is provided to demonstrate the proposed method.
A Review of the Language-Thought Debate: Multivariant Perspectives
Parviz Birjandi,Somayyeh Sabah
Brain. Broad Research in Artificial Intelligence and Neuroscience , 2012,
Abstract: In recent times, there has been a growing interest in analyzing the relationship between language and thought from a variety of points of view to explore whether language comes before thought or thought precedes language. Accordingly, the present paper attempts at mulling over the current debates on this issue, including Chomsky’s (1975, 1983) Independent Theory, the Sapir-Whorf hypothesis (1956), Piaget’s Cognitive Determinism (1952, as cited in, Chaput, 2001), Vygotsky’s (1978, 1986) Theory of Interchanging Roles, O’brien and Opie’s (2002) Radical Connectionism, and Slobin’s (1987, 1991, 2003) Thinking for Speaking Hypothesis, which recently have received a great amount of attention, among other positions. Then the pedagogical implications of the Thinking for Speaking Hypothesis for Second Language Acquisition (SLA) are presented.
A Critical Look at the Status of Affect in Second Language Acquisition Research: Lessons from Vygotsky’s Legacy
Parviz Maftoon,Somayyeh Sabah
Brain. Broad Research in Artificial Intelligence and Neuroscience , 2012,
Abstract: The phenomenon of affect and its relationship to second language learning is well-known and has been experienced by most language learners. One of the main debates that has recently appeared in the Second Language Acquisition (SLA) literature is related to the status of affective factors in this domain. The present paper attempts at mulling over the current controversies over affect with a special attention to Vygotsky’s account of the matter.
Nano-sizedsilicasupportedFeCl3asanefficientheterogeneouscatalystforthesynthesisof1,2,4-triazinederivatives
Davood Habibi,Somayyeh Vakili
催化学报 , 2015, DOI: 10.1016/S1872-2067(15)60829-4
Abstract: ?Theone-potsynthesisofaseriesof1,2,4-triazinesfromthereactionsofsemicarbazideorthiosemicarbazidewithvariousα,β-dicarbonylcompoundsunderrefluxconditionsinaEtOH-H2O(9:1)mixtureassolventandcatalyzedbynano-sizedsilicasupportedFeCl3(FeCl3@SiO2)wasinvestigated.TheFeCl3contentofthecatalystwasmeasuredbyatomicabsorptiontogettheadsorptioncapacity.Thereactionsgavehighyieldsoftheproductandthecatalystwaseasilyseparatedandreusedforsuccessivereactionrunswithoutsignificantlossofactivity.
Density functional theory studies on the structure, vibrational spectra of three new tetrahalogenoferrate (III) complexes  [PDF]
Shahriare Ghammamy, Kheyrollah Mehrani, Somayyeh Rostamzadehmansor, Hajar Sahebalzamani
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.38091
Abstract: Three new tetrahalogenoferrate (III) complexes with the general formula (R)4N[FeCl3X]– in that (X=F-,Cl-,Br-) synthesized by the reaction of FeCl3 with (C2H5)4NF, (CH3)4NCl and (C4H9)4NBr salts in anhydrous CH3CN. These were characterized by elemental analysis, IR, UV/Visible and 81Br-NMR spectroscopy. The optimized geometries and frequencies of the stationary point are calculated at the B3LYP/LANL2DZ level of theory. Harmonic vibrational frequencies and infrared intensities for FeCl3F-, FeCl4- and FeCl3Br- are studied by means of theoretical and experimental methods. The calculated frequencies are in reasonable agreement with the experiment values.
The Design and Construction of an Intelligent Taxi Electronic Payment System Solution  [PDF]
Mozhgan Sadeghian, Soheila Dadjou, Majid Meghdadi, Leila Safari, Somayyeh Sadeghian
Intelligent Control and Automation (ICA) , 2011, DOI: 10.4236/ica.2011.24047
Abstract: Today the usage of electronic services in different taxies seems to be necessary. Organizing a system to pay the taxi electronically with the card by the passenger can decrease the need to carry cash. Designing and building of such a system by using a special taximeter with new features and also one or more card reader can be fixed into the taxi. Payment is with the smart credit card and from the client's account. The information of presented services is stored in the system and will be recorded as offered services. The driver can have access to taxi organization or some special terminals electronically to see his account and also he can receive a receipt.
Design and Implementation of a Low-Power Active RFID for Container Tracking at 2.4 GHz Frequency  [PDF]
Dawood Moeinfar, Hossein Shamsi, Fatemeh Nafar
Advances in Internet of Things (AIT) , 2012, DOI: 10.4236/ait.2012.22003
Abstract: In this paper a new active RFID system at 2.45 GHz based on the low-power system-on-chip CC2530 RF transceiver is designed and implemented. Only by using of an integrated multi-channel fast chip, both the MCU and RF operations are done which makes the RFID more reliable and reduces the complexity of the hardware and cost, vividly. This RFID system utilizes the Zig-Bee IEEE 802.15.4 standard in the ISM band. A lot amount of energy is restored by setting Tags in the sleep mode in the most of times. The maximum transmission range of 80 m at the output power of 4.5 dBm is obtained. The main application of this system is for the container identification with precise operation and high accuracy. An active Tag with unique ID is mounted on each vehicle. By enabling the AUTOCRC error detection possibility, minor errors are detected in the received frames. Receiver sensitivity of –97 dBm and current consumption of 1 μA in the sleep mode and 29.6 mA in the active mode are reported.
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