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Search Results: 1 - 10 of 19267 matches for " Ali Sadeghi "
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Effect of Neurofeedback on Visual-Spatial Attention in Male Children with Reading Disabilities: An Event-Related Potential Study  [PDF]
Neda Sadeghi, Mohammad Ali Nazari
Neuroscience & Medicine (NM) , 2015, DOI: 10.4236/nm.2015.62013
Abstract:
Recent studies describe a number of difficulties associated with attention deficit in children with reading disabilities. Information about visual-spatial attention mainly arises from studies using event-related potentials (ERPs) during Posner’s spatial cueing paradigm. This study aims to use neurofeedback with a special protocol for treating children with reading disabilities, and moreo-ver, to evaluate visual-spatial attention ability by means of Posner paradigm task and ERPs. The study was conducted in a single subject design in 20 sessions. Participants were 2 male children, aged between 10 - 12 years old, who completed twelve 30-min neurofeedback sessions. Repeated measurements were performed during the baseline, treatment, and post treatment phases. Results showed some improvement in Posner paradigm parameters (correct response, valid and invalid reaction times). Furthermore, grand average ERPs for both of the participants in each of the four conditions (Valid-right, Invalid-right, Valid-left and Invalid-left) were analyzed. The analysis of P3 component showed a reduction in latency, indicating an improvement in the timing of cognitive processes. In addition, the graphs showed a decrease in amplitude level, which meant easier processing than before.
Cauchy's Equations and Ulam's Problem
Ali Sadeghi
Mathematics , 2014,
Abstract: Our aim is to study the Ulam's problem for Cauchy's functional equations. First, we present some new results about the superstability and stability of Cauchy exponential functional equation and its Pexiderized for class functions on commutative semigroup to unitary complex Banach algebra. In connection with the problem of Th. M. Rassias and our results, we generalize the theorem of Baker and theorem of L. Sze'kelyhidi. Then the superstability of Cauchy additive functional equation can be prove for complex valued functions on commutative semigroup under some suitable conditions. This result is applied to the study of a superstability result for the logarithmic functional equation, and to give a partial affirmative answer to problem 18, in the thirty-first ISFE. The hyperstability and asymptotic behaviors of Cauchy additive functional equation and its Pexiderized can be study for functions on commutative semigroup to a complex normed linear space under some suitable conditions. As some consequences of our results, we give some generalizations of Skof's theorem, S.-M. Joung's theorem, and another affirmative answer to problem 18, in the thirty-first ISFE. Also we study the stability of Cauchy linear equation in general form and in connection with the problem of G. L. Forti, in the 13th ICFEI (2009), we consider some systems of homogeneous linear equations and our aim is to establish some common Hyers-Ulam-Rassias stability for these systems of functional equations and presenting some applications of these results.
Comparison of Strain Ellipsoid Shape in the South of Ardabil Range (NW), Based on the Results of the Magnetic Susceptibility Anisotropy and Paleostress Methods  [PDF]
Ramin Sadeghi, Abdollah Saeedi, Mehran Arian, Manochehr Ghorashi, Ali Solgi
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.59054
Abstract: In recent years, the method of magnetic survey as one of the new techniques in geological and geophysical studies is known. In this study to determine the shape of the stress field of the two methods, Anisotropy of Magnetic Susceptibility (AMS) and paleostresshave been used. Paleomagnetism is the characteristics of magnetic rocks. Some issues in associated with the past places of continental and oceanic plates can be solved. AMS is one of the paleomagnetism methods that pay to measurement of parameters (which are reflector of the magnetic fabrics rocks). It is presenting an ellipsoid with three-axis perpendicular to each other that defines magnetic ellipsoid. In this regard, the number of 12 stations in different rocks (Jurassic to Quaternary) in the southern region of Ardebil sampling was conducted. In this connection, the study of magnetic fabrics has shown an elliptical magnetic susceptibility with the prolate shape. For the separation of paleostress phases in the Khalkhal area using the analysis of the paleostress based on the study of heterogeneous fault-slip data and sliding lineaments. Firstly, data were picked from 10 stations, and after their analysis, the elliptical shape (prolate) has been determinated. The shape of the ellipsoid, based on AMS and paleostress methods and their results show that in both methods the shape of the stress field is prolate.
Approximation of reconstruction formula for continuous wavelet and Weyl-Heisenberg frames
Ali Akbar Arefijamaal,Ghadir Sadeghi
Journal of Nonlinear Analysis and Application , 2012, DOI: 10.5899/2012/jnaa-00107
Abstract: As for an orthonormal basis, a frame allows each element in the underlying Hilbert space to be written as an unconditionally convergent infinite linear combination of the frame elements. The coefficients are called frame coefficients. Peter G. Casazza and Ole Christensen introduced some methods to approximate frame coefficients. In this article, we investigate some of these results for a continuous frame. As a consequence, approximation of the solution to a moment problem is also discussed. We also apply the results to wavelet frames and Weyl-Heisenberg frames.
Evaluation of Sourdough Effect on Microbiological Shelf Life and Sensory Properties of Iranian Barbari Bread
Alireza Sadeghi,Fakhri Shahidi,Seyed Ali Mortazavi,Balal Sadeghi
Biotechnology , 2008,
Abstract: The aims of this research were to apply the sourdough LAB containing specific starter cultures for Barbari bread production and evaluation it`s microbiological shelf life and sensory properties. The effects of fermentation times (8, 16 and 24 h), fermentation temperatures (28, 32 and 36 °C) and type of starter culture (Lactobacillus sanfransicencis (ATCC 14917), Lactobacillus plantarum (ATCC 43332) and a mixture of both LAB) were analyzed in a completely randomized design with factorial experiment and 4 replications was conducted. Microbiological shelf lives of samples were determined by plating serial dilutions on to plate count agar, at days 1 to 7. Breads sensory properties were determined in 1, 24, 48 and 72 h intervals, after baking according to AOAC standard method. The results showed that, sourdough had significant effect (p≤0.05) on microbiological shelf life and sensory properties of Barbari bread in comparison with control sample. Moreover the produced sample with Lactobacillus plantarum (24 h fermentation time and 32 °C fermentation temperature) had the most microbiological shelf life and the sample produced with a mixture of both LAB (16 h fermentation time and 28 °C fermentation temperature) had the best sensory evaluation, 72 h after baking.
The Effect of an Intravenous Bolus of Ultra-Low-Dose Naloxone on Intraoperative Sedation, Post Operative Pain Intensity and Morphine Consumption in Cesarean Section Patients under Spinal Anesthesia
Mustafa Sadeghi,Ali Movafegh,Behrang Nouralishahi
Research Journal of Biological Sciences , 2012,
Abstract: Different drugs from various pharmacological classes have been used to enhance postoperative opioid analgesia and reduce adverse effects. Animal studies have demonstrated that co-administration of an ultra-low-dose opioid antagonist with an opioid agonist may result in enhanced analgesia. Investigation of this effect in humans has been limited and produced inconsistent findings. In this study, 60 patients were randomized into 2 groups to receive either 2 mL saline (control group) or received IV dose of 100 ng kg 1 naloxone (diluted with normal saline to 2 mL) (naloxone group) after to the administration of spinal anesthesia (15 mg 0.5% hyperbaric bupivacaine). After administration of IV medication (saline or naloxone), sedation were scored with the Richmond Agitation-Sedation Scale at times 0, 5, 20, 30 min, respectivily. Following the surgery, patients were asked to score the pain (using 10-cm Visual Analog Scale (VAS) at the arrival in the ward and 2, 4, 8, 12 and 24 h, respectivily after surgery. The presence of Postoperative Nausea and Vomiting (PONV) and pruritus were recorded. All enrolled patients received post-operative intravenous analgesia delivered through a PCA pump. The demographic characteristics of patients, ASA physical status class, duration of surgery, basal VAS and basal sedation score were similar in the 2 groups. Total dose of morphine (38.3 10.7 mg in C group and 23.5 7.1 mg in N group, independent t test<0.001), the VAS pain score at time intervals (Mann-Whitney u test, p<0.001) and the intraoperative sedation score (Mann-Whitney u test, p<0.001) were significantly lower in the naloxone group. There were no significant differences in incidence of PONV and pruritus in groups.
Evaluation of Acetone Vapors Toxicity on Plodia interpunctella (Hubner) (Lepidoptera: Pyralidae) Eggs
Ali Asghr Pourmirza,Fershteh Sadeghi Nasab
Pakistan Journal of Biological Sciences , 2007,
Abstract: The efficacy of acetone vapors against carefully aged eggs of Plodia interpunctella (Hubner) at 17±1 and 27±1°C at different dosage levels of acetone over various exposure times was determined. Acetone was found to be toxic to Indian meal moth eggs. Considerable variation in the susceptibility of different age groups of eggs was apparent in the fiducial limits of the LD50 values. An inverse relationship between LD50 values and exposure times was observed in age groups of tested eggs. At 27±1°C and 24 h exposure period, eggs aged 1-2 day-old were more tolerant to acetone than other age groups, followed by 0-1 day-old, 2-3 day-old and 3-4 day-old eggs. A similar pattern of susceptibility of eggs was observed at 72 h exposure. In all bioassays, eggs exposed to higher dosages of acetone developed at smaller rate. This was significant for the eggs, which were exposed to the highest dosage for 24 h. Increasing the temperature from 17±1 to 27±1°C greatly increased the efficacy of acetone. At 27±1°C eggs of P. interpunctella were killed by less than one-third of the dosage required for control at 17±1°C. Acetone achieved 50% mortality with a dosage of 82.76 mg L-1 in 1-2 day-old eggs at 27±1°C. At this temperature hatching was retarded and greatly diminished when eggs aged 1-2 day-old were exposed to 80 mg L-1 of acetone for the 24 h exposure period. There was no evidence of a hatch delay longer than the time spent under vapors for eggs exposed at 17±1 or 27±1°C, indicating that some development must have occurred under fumigation.
A mass after discectomy, what can it be?
Samad Shams VAHDATI,Ali RIAZI,Hosna SADEGHI
Marmara Medical Journal , 2011,
Abstract: A 28-year old young man presented with a complaint of low-back pain. He had had this problem for 2 years, and the pain had been radiating to his left calf for 4 months. The patient had undergone surgery for lumbar disc herniation 3 months prior to presentation. Physical examination indicated good health status. There was erythema and discharge at the incision site without tenderness and swelling. The straight leg-raising test was positive at near to 80° on the left. The patient's left hamstring muscle strength was 4/5, and he had normal patellar deep tendon reflex on that side...
Triangular and Trapezoidal Fuzzy State Estimation with Uncertainty on Measurements
Mohammad Sadeghi Sarcheshmah,Ali Reza Seifi
Advances in Electrical and Electronic Engineering , 2012,
Abstract: In this paper, a new method for uncertainty analysis in fuzzy state estimation is proposed. The uncertainty is expressed in measurements. Uncertainties in measurements are modelled with different fuzzy membership functions (triangular and trapezoidal). To find the fuzzy distribution of any state variable, the problem is formulated as a constrained linear programming (LP) optimization. The viability of the proposed method would be verified with the ones obtained from the weighted least squares (WLS) and the fuzzy state estimation (FSE) in the 6-bus system and in the IEEE-14 and 30 bus system.
The Effect of an Intravenous Bolus of Ultra-Low-Dose Naloxone on Intraoperative Sedation, Post Operative Pain Intensity and Morphine Consumption in Cesarean Section Patients under Spinal Anesthesia
Mustafa Sadeghi,Ali Movafegh,Behrang Nouralishahi
Research Journal of Biological Sciences , 2008,
Abstract: Different drugs from various pharmacological classes have been used to enhance postoperative opioid analgesia and reduce adverse effects. Animal studies have demonstrated that co-administration of an ultra-low-dose opioid antagonist with an opioid agonist may result in enhanced analgesia. Investigation of this effect in humans has been limited and produced inconsistent findings. In this study, 60 patients were randomized into 2 groups to receive either 2 mL saline (control group) or received IV dose of 100 ng kg-1 naloxone (diluted with normal saline to 2 mL) (naloxone group) after to the administration of spinal anesthesia (15 mg 0.5% hyperbaric bupivacaine). After administration of IV medication (saline or naloxone), sedation were scored with the Richmond Agitation-Sedation Scale at times 0, 5, 20, 30 min, respectivily. Following the surgery, patients were asked to score the pain (using 10-cm Visual Analog Scale (VAS) at the arrival in the ward and 2, 4, 8, 12 and 24 h, respectivily after surgery. The presence of Postoperative Nausea and Vomiting (PONV) and pruritus were recorded. All enrolled patients received post-operative intravenous analgesia delivered through a PCA pump. The demographic characteristics of patients, ASA physical status class, duration of surgery, basal VAS and basal sedation score were similar in the 2 groups. Total dose of morphine (38.3±10.7 mg in C group and 23.5±7.1 mg in N group, independent t test<0.001), the VAS pain score at time intervals (Mann-Whitney u test, p<0.001) and the intraoperative sedation score (Mann-Whitney u test, p<0.001) were significantly lower in the naloxone group. There were no significant differences in incidence of PONV and pruritus in groups.
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