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Search Results: 1 - 10 of 3168 matches for " Seyed-Fariborz Hashemi-Dizaji Mail "
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EFFECT OF SOAKING PROCESS IN WATER ON THE ACOUSTICAL QUALITY OF WOOD FOR TRADITIONAL MUSICAL INSTRUMENTS
Mehran Roohnia,Seyed-Fariborz Hashemi-Dizaji Mail,Lo?c Brancheriau Mail,Ajang Tajdini
BioResources , 2011,
Abstract: The damping coefficient of the first mode in the longitudinal vibration of mulberry and walnut woods was characterized to find justifications for the water soaking of woods in traditional musical instrument industries in Iran. Visually clear and sound beams were prepared from Morus alba and Juglans regia, and the damping coefficient in the temporal field was evaluated before and after three continuous cycles of soaking of specimens in distilled water (24 hours, pH 7, and temperature 50 oC). Experiments were conducted with free longitudinal vibration using the free-free bar method in 360×20×20 (L×R×T) dimensions. Soaking cycles homogenized and decreased the damping coefficient in both species. On the basis of such results, the suitability of water soaked specimens is discussed in traditional musical instrument industries in Iran, taking into the account the longitudinal sound velocity, modulus of elasticity, and density affecting the acoustic limits. These two series of testing specimens were suitable in resonators and xylophone bars for backs, sides, and ribs and not for top plates, unless as the outstanding piece, since they marginally meet the density, sound velocity and damping coefficient limits qualified for those applications.
Status of Narcotic Drugs in Islamic Jurisprudence and Foundations of Islamic Laws  [PDF]
Kazem Mirzaei Nejad, Seyed Hossein Hashemi
Beijing Law Review (BLR) , 2018, DOI: 10.4236/blr.2018.93025
Abstract: Narcotic drugs have been a problem for human communities for a long time. The problem has become even worse since its use has become broad and people can provide it manually and by industrial equipment. Regarding the depth of its teachings, Islam has focused its main attention on human and his/her well-being both in this and the other worlds. Islam has acknowledged and valued wisdom more than any other schools of thoughts and has never admitted inflicting harm on such a precious gold, including the harmful effects of the narcotic drugs that influences on the wisdom and psych of humans; therefore, Islam has seriously antagonized and prohibited this act and it has been certainly known as a forbidden act by the Islam. This article studied jurisprudential and legal foundations of prohibition of narcotic drugs, which are included in cases Islam has prohibited. All the following concepts approve the above claims and the authors of this article have studied them: Unjust enrichment, avoiding from unclearness and wickedness, abstaining from any evil acts and narcotic drugs use as a leader of all evil deeds, and destroying oneself. Furthermore, expanding, extending and presenting the foundation of the prohibition of narcotic drugs can help authorities with their mission in campaigning against such an evil phenomenon. The authorities will be able to prioritize fighting against drugs, and finally eradicate them with peace of mind and easefully with accessing to legitimate authorization and religious orders based on the prohibition of the narcotic drugs in Islam.
The Use of Critical Thinking in Social Science Textbooks of High School: A Field Study of Fars Province in Iran
Seyed Ahmad Hashemi
International Journal of Instruction , 2011,
Abstract: This study aims at investigating the use of critical thinking in high school social science textbooks based on Fars Province teachers' attitudes in order to present a model for textbook development. To achieve this goal, the use of the following skills in the social science textbooks was analyzed: reasoning, questioning, assessment of examples and statements, group work, interpretation, true judgment about issues, analysis and evaluation, logicality, and explicitness. It is a field study which was conducted in several high schools of Fars Province in Iran. The population of this study included 568 social science teachers. The sample was selected based on the stratified random sampling procedure so that 153 teachers participated in this study. The data were collected using a forty-four-item questionnaire based on Likert-scale, which was developed and validated by the researcher himself and some experts. The reliability coefficient was also estimated as 0.86. The data were analyzed through descriptive statistics (frequency, percentage, standard deviation, and coefficient of variations) and inferential statistics (Chi-square and Kruskal-Wallis Non-parametric tests). The result showed that the teachers of the Social Studies Textbook evaluated assessment of examples and statements, and analysis and evaluation skills as not satisfactory respectively. They evaluated the other skills as fairly satisfactory. Teachers of Sociology Textbook 1 evaluated explicitness, assessment of examples and statements, analysis and evaluation, and interpretation skills as not satisfactory respectively. They also evaluated other skills as fairly satisfactory. Teachers of Sociology Textbook 2 evaluated explicitness as not satisfactory, logicality as satisfactory, and other skills as fairly satisfactory. Therefore it is possible to rank order the social science textbooks of high school as satisfactory and not satisfactory with regard to the use of critical thinking. In other words, Sociology Textbook 2, Social Studies Textbook, and Sociology Textbook 1 were ordered on a continuum of satisfaction from satisfactory to unsatisfactory, respectively.
Prevalence Rate of Congenital Anomaly of Male Newborn in Fasa Hospital
Seyed Mohsen Hesami,Fariborz Ghafarpasand,Farhood Nikouee
Journal of Fasa University of Medical Sciences , 2011,
Abstract: Background & Objectives: Congenital anomalies of external genitalia are one of the most frequently congenital anomalies especially in the boys neonates, that in many cases no definite cause was found for them. Because of having basic knowledge will help our for early diagnosis planning, early treatment and decreasing psycho-social problems of these patients and their parents, we decided to carry out this study to survey of congenital anomalies of external genitalia among boy neonates born in valiasr hospital-Fasa and additionally to compare our findings with other studies in other cities of Iran. Materials & Methods: This study is a descriptive, cross sectional study, that was done with all of neonates who were born from October until March 2011 in valiasr hospital-Fasa .Sample was examined by pediatrician for general and external genitalia assessment. Neonates with reproductive disease reassessed by urologist physician and paraclinical assessment were done if it was necessary. Impalpable one or both testes in scrotum defied as undescended testis. Having hydrocele and hernia was confirmed by physical exam and sonography. Results: During the study 885 recently born boy neonate were assessed. Among participants 58 boys (%6.5) have congenital anomalies of external genitalia.Hydrocele was the most frequent anomaly that was seen in 25 boy neonates(%2.8).The second anomaly was undescended testis that was observed in 19 boy neonates.(%2.1).Then hypospadias in 11 neonates(%1.2) and inguinal hernia in 3 neonates(%0.4) were seen. Conclusion: This study showed that hydrocele ,undescended testis ,hypospadias and inguinal hernia are orderly the most frequent congenital anomalies of external genitalia in recently born neonates in Fasa.
Control of Three Stored Product Beetles with Artemisia haussknechtii (Boiss) (Asteraceae) Essential Oil
Seyed Mehdi Hashemi,Seyed Ali Safavi
Ecologia Balkanica , 2012,
Abstract: Fumigant toxicity of the essential oil of aerial parts from Artemisia haussknechtii (Boiss) (Asteraceae) was investigated against the cowpea weevil Callosobruchus maculatus (Fab.), the rice weevil Sitophilus oryzae (L.), and the red flour beetle Tribolium castaneum (Herbst). Dry ground plants were subjected to hydro distillation using a Clevenger type apparatus and the chemical composition of the volatile oil was studied by gas chromatography mass spectrometry (GC MS). The major components of the oil were camphor (29.24%), 1, 8 cineol (27.62%), yomogi alcohol (5.23%), and camphene (4.80%). The essential oil in same concentrations was assayed against (1 7 days old) adults of insect species and percentage mortality was recorded after 24, 48, and 72 h exposure times. LC50 values were varied between 19.84 and 103.59 μL L-1 air, depending on insect species and exposure time. Callosobruchus maculatus was more susceptible than other species. These results suggested that A. haussknechtii oil might have potential as a control agent against C. maculatus, S. oryzae and T. castaneum.
Chemical Constituents and Toxicity of Essential Oils of Oriental Arborvitae, Platycladus orientalis (L.) Franco, against Three Stored-Product Beetles Componentes Químicos y Toxicidad de Aceites Esenciales de Tuya Oriental, Platycladus orientalis (L.) Franco, contra Tres Escarabajos de Productos Almacenados
Seyed Mehdi Hashemi,Seyed Ali Safavi
Chilean Journal of Agricultural Research , 2012,
Abstract: Plant secondary metabolites play an important role in plant-insect interactions and therefore such compounds may have insecticidal or biological activity against insects. Fumigant toxicity of essential oils of leaves and fruits from oriental arborvitae (Platycladus orientalis (L.) Franco) (Cupressaceae) was investigated against adults of cowpea weevil (Callosobruchus maculatus Fab.), rice weevil (Sitophilus oryzae L.), and red flour beetle (Tribolium castaneum Herbst). Fresh leaves and fruits were subjected to hydrodistillation using a Clevenger-type apparatus and the chemical composition of the volatile oils was studied by gas chromatography-mass spectrometry (GC-MS). Twenty-six compounds (92.9%) and 23 constituents (97.8%) were identified in the leaf and the fruit oils, respectively. The major components of both leaves and fruits oils were α-pinene (35.2%, 50.7%), α-cedrol (14.6%, 6.9%) and Δ-3-carene (6.3%, 13.8%), respectively. Both oils in the same concentration were tested for their fumigant toxicity on each species. Results showed that leaf oils were more toxic than fruit oils against three species of insects. Callosobruchus maculatus was more susceptible than S. oryzae and T. castaneum. LC510 values of the leaf and the fruit oils at 24 h were estimated 6.06 and 9.24 μL L1 air for C. maculatus, 18.22 and 21.56 μL L-1 air for S. oryzae, and 32.07 and 36.58 μL L4 air for T. castaneum, respectively. These results suggested that P. orientalis oils may have potential as a control agent against C. maculatus, S. oryzae, and T. castaneum. Los metabolitos secundarios de las plantas juegan un papel importante en las interacciones planta-insecto, y por lo tanto pueden tener actividad insecticida o biológica en los insectos. La toxicidad fumigante de los aceites esenciales de hojas y frutos del árbol oriental de la vida (Platycladus orientalis (L.) Franco) (Cupressaceae) fue investigada contra adultos de gorgojo del guisante (Callosobruchus maculatus Fab.), gorgojo del arroz (Sitophilus oryzae L.), y escarabajo rojo de la harina (Tribolium castaneum Herbst). Las hojas frescas y las frutas fueron sometidas a hidrodestilación utilizando un aparato tipo Clevenger y la composición química de los aceites volátiles se estudió por cromatografía de gas-espectrometría de masa (GC-MS). Se identificaron 26 (92,9%) y 23 compuestos (97,8%) en los aceites de hoja y de frutos, respectivamente. Los componentes principales de los aceites de hojas y frutos fueron α-pineno (35,2%, 50,7%), α-cedrol (14,6%, 6,9%) y Δ-3-careno (6,3%, 13,8%), respectivamente. Ambos aceites fueron
Facies Analysis, Depositional Environment of the Lower Permian Deposits of Chili Formation in Kalmard Block, Eastern Central Iran (Darin Section)  [PDF]
Javad Shahraki, Mohammad Javad Javdan, Seyed Mahmood Pahlavan Hashemi, Mohsen Jami, Mahdiyeh Nastooh, Seyed Mohammad Kalvandi
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.58049
Abstract: Early Permian deposits in north of Kalmard region recognize with formal group of Khan; they have various features in the different place. This group includes four different formations from lower to the upper part: Chili, Sartakht and Hermez. These formations consist of carbonate rocks. Chili Formation has 104 m, thickness in Darin section and consists of limestone with intermediates of shale and marland sandstone. Lower boundary of this formation is disconformable with Gachal formation. The upper boundary is separated by unconformity from the upper part Sartakht formation according to the lithological characters and microscopic studies, cause identifications of beach, intertidal, open and semi-restricted lagoon, shoals and bar and open marine sub-environ- ments for the Chili Formation. Vertical changes of microfacies and depth changes curve show much more thickness of shoals and bar microfacies, and little thickness of open and semi-re- stricted lagoon and open marine microfacies. Deposits of Chili Formation in Darin section deposited in the gentle gradient Homoclinal ramp in the south of Paleotethys Ocean. Two depositional sequences have been identified in this formation, based on recognized Fusulinid, show age of Sakmarian, which has adaptation with Lower Absaroka III.
RETRACTED: Lead in Karvandar River Basin Sediment, Sistan and Balouchestan, IRAN  [PDF]
Javad Shahraki, Mohammad Javad Javdan, Seyed Mahmood Pahlavan Hashemi, Mohsen Jami, Mahdiyeh Nastooh, Seyed Mohammad Kalvandi
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.58048
Abstract: Short Retraction Notice

The paper does not meet the standards of \"Open Journal of Geology\".

This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.

The full retraction notice in PDF is preceding the original paper, which is marked \"RETRACTED\".

The quality of life in cochlear implant children after two years from surgery and its impact on the family
Seyed Basir Hashemi,Leyla Monshizadeh
Iranian Journal of Otorhinolaryngology , 2010,
Abstract: Introduction: Cochlear implant has been established as effective option in rehabilitation of individuals with profound hearing impairment. As much of the studies about cochlear implants concentrated on aspects of speech perception and production, so we decided to study the quality of life of pre-lingual deaf children after at least 2 years of implantation. Materials and Methods: Twenty four patients’ parents in Fars Center were selected that had been implanted for at least 2 years and they filled the quality of life questionnaire. Three months later this questionnaire was filled again and results of two stages were analyzed. Results: In part of assessments p-value shows significant change in parent’s satisfaction. They believe that they can be beneficial for their children and in another part of this study, parents believe that the children communicate better, but still they need special care to do school homework and they have some difficulties in articulation. Conclusion: cochlear implantation is associated with improvement in quality of life. The improvement is significant in aspects of social communications and happiness.
On the Free Vibration Modeling of Spindle Systems: A Calibrated Dynamic Stiffness Matrix
Omar Gaber,Seyed M. Hashemi
Shock and Vibration , 2014, DOI: 10.1155/2014/787518
Abstract: The effect of bearings on the vibrational behavior of machine tool spindles is investigated. This is done through the development of a calibrated dynamic stiffness matrix (CDSM) method, where the bearings flexibility is represented by massless linear spring elements with tuneable stiffness. A dedicated MATLAB code is written to develop and to assemble the element stiffness matrices for the system’s multiple components and to apply the boundary conditions. The developed method is applied to an illustrative example of spindle system. When the spindle bearings are modeled as simply supported boundary conditions, the DSM model results in a fundamental frequency much higher than the system’s nominal value. The simply supported boundary conditions are then replaced by linear spring elements, and the spring constants are adjusted such that the resulting calibrated CDSM model leads to the nominal fundamental frequency of the spindle system. The spindle frequency results are also validated against the experimental data. The proposed method can be effectively applied to predict the vibration characteristics of spindle systems supported by bearings. 1. Introduction The booming aerospace industry and high levels of competition have forced companies to constantly look for ways to optimize their machining processes. Cycle time has been a major concern at various industries dealing with manufacturing of airframe parts and subassemblies. When trying to machine a part as quickly as possible, spindle speed or metal removal rates are no longer the limiting factors but rather the chatter that occurs during the machining process. It is well established that chatter is directly linked to the natural frequency of the cutting system, which includes the spindle, shaft, tool, and hold combination. The first mention of chatter can be credited to Taylor in 1907 [1]; however, the first comprehensive investigation of the problem was published by Arnold, in 1946 [2]. Arnold’s experiments were conducted on the turning process, where he theorized that the machine could be modeled as a simple oscillator and that the force on the tool decreased as the speed of the tool in relation to the work piece increased. Gurney and Tobias later theorized the now widely accepted belief that chatter is caused by wave patterns traced onto the surface of the work piece by preceding tool passes [3]. The phase shift of the preceding wave to the wave currently being traced determines whether there is any amplification in the tool head movement. If there exists a phase shift between the two tool paths, then
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