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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: VETERINARY RESEARCH FORUM
- نوع مقاله: Journal Article
- کلمات کلیدی: Avian,Histopathology,Canary (Serinus canaria),Extraskeletal osteoma
- چکیده:
- چکیده انگلیسی: Osteoma is an uncommon bone tumor in avian species and other animals. A 2-year-old male canary (Serinus canaria) with a history of an oval mass in the left wing for several months was examined. Radiographs showed a radio-opaque mass. Upon the bird’s owner request, the canary was euthanatized and submitted for necropsy. The histopathologic examination revealed numerous trabeculae consisting of both woven and lamellar bone covered by one to several rows of normal osteoblasts. The trabeculae were closely packed, having only small intertrabecular spaces which contained proliferating osteoblasts, sinusoids and myeloid tissue. Based on clinical, radiographic, and histopathologic findings, the mass was diagnosed as extraskeletal osteoma. To the best of authors’ knowledge, extraskeletal osteoma has not been reported in in avian species so far, and this is the first report of osteoma tumor in the birds. However, benign tumors of bones are extremely rare in the birds, osteoma should be considered as a differential diagnosis in the birds with bone lesions.
- انتشار مقاله: 24-06-1396
- نویسندگان: Moosa Javdani,Mohammad Hashemnia,Zahra Nikousefat,Mohammad Ghasemi
- مشاهده
- جایگاه : پژوهشی
- مجله: Sociological of Studies of youth
- نوع مقاله: Journal Article
- کلمات کلیدی: Social Factors,Youth,Psychological,Social Sense of Security,Chahar mahal Va Bakhtiari
- چکیده:
- چکیده انگلیسی: This article seeks to examine the effect of social and psychological factors which affect on the sense of social security. The research design was descriptive and correlation method that applied to questionnaire for measuring all the youth from 20 to 30 years of age from Charmahal va Bakhtiari among 310 ones from different towns were selected by multi-age approach. Data were obtained by using correlation and regression were analyzed. As the results showed that motivations of students to engage with the police can be an important factor in their sense of security, Those young people who are involved with the police feel more secure as much. The results also showed that the size of the police to support as much as they feel more secure Therefore it is necessary to have more programs to support youth in the community to deal with the threats.
- انتشار مقاله: 20-09-1392
- نویسندگان: Hojatollah Moradi Pordanjani,Sattar Sadeghi,Enayatollah Tavakoli,Mohammad Ghasemi
- مشاهده
- جایگاه : پژوهشی
- مجله: Pure Life
- نوع مقاله: Journal Article
- کلمات کلیدی: Social Networks,Cyberspace,Cultural Jihad
- چکیده: پژوهش حاضر با هدف بیان ضرورت جهاد در شبکه های اجتماعی فضای مجازی تدوین شده است. در این پژوهش با روش کیفی- توصیفی و با استفاده از مطالعات کتابخانه ای و ابزار فیش برداری به گردآوری اطلاعات پرداخته شده است.
یافته های پژوهش نشان می دهد جهاد سیاسی، علمی، فرهنگی و اقتصادی در شبکه های اجتماعی فضای مجازی ضرورت ویژه ای دارد؛ لذا تمامی کاربران عضو فضای مجازی- به ویژه جوان مسلمان- باید در این فضا به صورت فعال و جهادگونه و به دور از انفعال، فعالیت نمایند و ضمن حفظ خود از تهدیدهایی که فضای مجازی در بر دارد از فرصت های آن نهایت استفاده را برده و نقشه های دشمان را نقش بر آب کند.- چکیده انگلیسی: The present study aims to express the necessity of jihad in social networks of cyberspace. In this study, qualitative-descriptive method has been used to collect data using library studies and fisheries tools.
Research findings show that political, scientific, cultural, and economic jihad in social networks are of particular importance, so all users of the cyberspace - especially young Muslims - must be active and jihadist in this space, away from Inactivate, operate, while protecting itself from the threats posed by cyberspace, taking full advantage of its opportunities and destroying enemy plans.- انتشار مقاله: 15-05-1396
- نویسندگان: Mohammad Ghasemi Siani,Marjan Shiravi,AmirHossein Ishaghian Rizi
- مشاهده
- جایگاه : پژوهشی
- مجله: Sahand Communications in Mathematical Analysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Admitting center map,Nonexpansive map,Cochebyshev set,Best proximity pair
- چکیده:
- چکیده انگلیسی: In this work we investigate a class of admitting center maps on a metric space. We state and prove some fixed point and best proximity point theorems for them. We obtain some results and relevant examples. In particular, we show that if $X$ is a reflexive Banach space with the Opial condition and $T:Crightarrow X$ is a continuous admiting center map, then $T$ has a fixed point in $X.$ Also, we show that in some conditions, the set of all best proximity points is nonempty and compact.
- انتشار مقاله: 29-10-1396
- نویسندگان: Mohammad Hosein Labbaf Ghasemi,Mohammad Reza Haddadi,Noha Eftekhari
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Theoretical and Applied Vibration and Acoustics
- نوع مقاله: Journal Article
- کلمات کلیدی: Nonlinear energy harvesting,Multimodal duffing oscillator,Complexification averaging method,Arc length continuation method
- چکیده:
- چکیده انگلیسی: A semi-analytical method is used to illustrate the behavior of a multimodal nonlinear electromechanical system which is under base-excitation. System is considered as piezo-ceramic patches attached to a cantilever beam coupled to a resistive load. The cantilever beam is modeled as a nonlinear Timoshenko beam using Assumed Mode method and equations of motion are derived through Lagrange's equation. Nonlinear multimodal equations are solved with Complexification Averaging method and results are compared with numerical simulations. Arc length Continuation method is used to achieve frequency response of the system. Results are presented for different values of geometric and physical parameters and the effect of this variations are discussed.
- انتشار مقاله: 22-11-1393
- نویسندگان: Moein Mohammadpour,Morteza Dardel,Mohammad Hasan Ghasemi,Mohammad Hadi Pashaei
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Theoretical and Applied Vibration and Acoustics
- نوع مقاله: Journal Article
- کلمات کلیدی: Control,Nonlinear dynamics,Multiple clearance joints,Joint friction
- چکیده:
- چکیده انگلیسی: In the current study, behavior of crank-slider mechanism with single and multiple clearance joints are analyzed. Using Lankarani-Nikravesh theory for estimating discontinuous contact forces in clearance joints, relevant systems have been mathematically modeled. Through numerical simulations, perturbations in response of mechanisms with clearance joints have been analyzed. Effects of increasing number of clearance joints have been addressed. From comparisons between responses of crank-slider mechanism with a single clearance joint and multiple clearance joints, it is concluded that perturbations intensify as the number of clearance joints in mechanism increases. Nonlinear dynamics of system are analyzed, using Poincare maps and bifurcation diagrams. Effects of joint friction on the response of the mechanism are investigated. Subsequently, a control scheme for providing continuous contact in clearance joints and maintaining a more stable mechanism is pro-posed. Obtained results demonstrate the effectiveness of proposed control method on reducing effect's of clearance and maintaining continuous contact in clearance joint
- انتشار مقاله: 22-11-1393
- نویسندگان: Morteza Dardel,Sadeq Yaqubi,Hamidreza Mohammadi Daniali,Mohammad Hassan Ghasemi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Rehabilitation in Civil Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: corrosion,Crack,Reinforced Concrete Beam,Nano Wollastonite,GMDH-type Neural Network
- چکیده:
- چکیده انگلیسی: Cracking of the concrete cover due to corrosion is defined as the serviceability limit state of reinforced concrete structures. This study evaluated the influence of a mineral admixture i.e. nano wollastonite on corrosion performance and serviceability of reinforced concrete structures by performing an accelerated corrosion test on ten reinforced concrete beams under a sustained load. To do so, five concrete beams were treated with nano wollastonite (NCW), while the others were normal concrete beams (NC). The results were discussed in terms of corrosion crack patterns, crack width, half-cell potentials, rebar mass loss, and rebar diameter degradation at different corrosion levels. The results showed that the incorporation of nano wollastonite in reinforced concrete beams increased the service life by increasing the initial cracking time, decreasing the corrosion crack growth rate and rebar mass loss. Given the maximum 0.3 mm corrosion crack width as limit state criteria, the lifetime of the NCW reinforced beams was 3.6 times longer than that of Group NC. The experimental results were compared with existing models. However, these models were unreliable in predicting the steel cross-section loss based on crack width. To solve this problem, a GMDH-type neural network model was developed and evaluated using obtained experimental data for NC and NCW beams.
- انتشار مقاله: 02-10-1396
- نویسندگان: Mahmoud Miri,Mohammad Reza Ghasemi,Hossein Beheshti Nezhad
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Health Management and Informatics
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Introduction: Myocardial infarctions (MI), as one of the outcomes of cardiovasculardiseases, are responsible for 20% of deaths, so that every 30 seconds, one person suffersfrom MI. Various drugs are used to treat myocardial infarction, and we need to have preciseinformation of the cost-effectiveness of these drugs. The aim of this study was to examineeconomic evaluation of the drugs used for treatment of patients with MI.Methods: In the present systematic review study, published articles related to economicevaluation of the drugs used for treatment of patients with MI within the time intervalbetween 2000 and 2017 were searched, using electronic databases such as Tufts MedicalCenter Cost-Effectiveness Analysis Registry ,Cochrane library, NHS Economic EvaluationsDatabase Medline, PubMed, Google scholar, web of science using the following keywords:Cost- effectiveness* OR cost- utility* OR economic evaluation * AND (myocardial infarction *) AND (angiotensin- converting enzyme inhibitor (lisinopril) OR thrombolytic agents(streptokinase, anistreplase or anisoylated plasminogen streptokinase activator complex OR beta blockers (metoprolol, propranolol, atenolol, acebutolol, bisoprolol). Due to heterogeneity in the outcome, we were not able to use meta-analysis. Methodological quality of the structuree of tarticles was examined by Drummond’s standard checklist.Results: Based on the inclusion criteria, the search of databases resulted in 12 articles thatfully covered economic evaluation of the drugs used in treating patients with MI. The resultsof the present study indicated that a streptokinase and t-PA drug for treatment of patientswith myocardial infarction was cost-effective. The results showed that most of the studiesclearly stated the time horizon of the study and included direct medical costs in their analysis. In addition, the majority of the studies were used the Markov model. The quality-adjusted life years (QALYs) were the main outcome used for measuring the effectiveness.Conclusion: The results of the present study showed that a thrombolytic agent for treatmentof patients with myocardial infarction was cost-effective. The results were relatively varied due to the differences in time horizon and variables used in the models such as efficacy and drug prices. Furthermore, these studies were designed and conducted in high-income countries; thus, the application of these results in low- and middle-income countries will be limited.Keywords: Economic evaluation, Systematic review, Myocardial Infarction, Drummond’schecklist
- انتشار مقاله: 19-10-1397
- نویسندگان: Aziz Rezapour,Marziye Hadian,Mohammad Ghasemi,Sajad Vahedi,Abdosaleh Jafari
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Health Management and Informatics
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: AbstractIntroductionMyocardial infarctions (MI) as one of the outcomes of cardiovascular diseases alone are responsible for 20% of deaths, so that every 30 seconds, one person suffered from MI. Various drugs are used to treat myocardial infarction and we need to have precise information of the cost-effectiveness of these drugs. The aim of this study was to examine economic evaluation of drugs used for treatment of patients with MI. Methods In the present review study, published articles related to economic evaluation of drugs used for treatment of patients with MI within the time interval between 2000 and 2017 were searched using electronic databases. Methodological quality of structure of articles was examined by Drummond’s standard checklist.ResultsThe results of the present study indicated that, a streptokinase and t-PA drug for treatment of patients with myocardial infarction was cost-effective. The results showed that most of the studies clearly stated the time horizon of the study and included direct medical costs in their analysis. In addition, majority of the studies used the Markov model. The quality-adjusted life years (QALYs) were the main outcome used for measuring the effectiveness.ConclusionThe results of the present study showed that, a thrombolytic agent for treatment of patients with myocardial infarction was cost-effective. The results were relatively varied due to the differences in time horizon and variables used in the models such as efficacy, and drug prices. Furthermore these studies were designed and conducted in high-income countries; thus, the application of these results in low- and middle-income countries will be limited.
- انتشار مقاله: 07-05-1397
- نویسندگان: Aziz Rezapour,Marziye Hadiyan,Mohammad Ghasemi,Sajad Vahedi,Abdosaleh Jafari
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Algorithms and Computation
- نوع مقاله: Journal Article
- کلمات کلیدی: reliability,Failure Probability,Genetic Algorithms,Based Optimization,Space structures
- چکیده:
- چکیده انگلیسی: Due to the probabilistic nature and uncertainties of structural parameters, reliability-based optimization will enable engineers to account for the safety of the structures and allow for its decision making applicability. Thus, reliability-based design will substitute deterministic rules of codes of practice. Space structures are of those types that have an exceedingly high range of applicability aspects in civil engineering. Therefore optimization of such structures with great and considerable number of members will be economically wise. For this purpose, the optimization process could be carried out using various mathematical models. One such model is to minimize weight while considering elements failure probability as constraints. Another form is to minimize weight and then regarding the whole structure system reliability as constraint. The third type could be to minimize failure probability as well as its weight, while taking into account the structural system reliability as the constraint. In this research each of the above forms were studied and the results were compared. Also, apart from reliability considerations for the members, the reliability of nodes was also taken into account. Node failure means that node displacement in at least one direction exceeds that of the allowable value. As well the effect of various stochastic parameters such as load, yield stress, modulus of elasticity and cross section were studied. The stochastic parameters discussed in this study are statistically independent and possess standardized normal distribution. To avoid local convergence during the process of optimization, Genetic Algorithms is used as means of optimization. This study show that with increasing the members or system admissible failure probability, optimum weight of structure increases, but with increasing the coefficient of variation of load or yield stress, optimum weight increases.
- انتشار مقاله: 15-02-1392
- نویسندگان: Mohammad Reza Ghasemi,Mohammad Reza Mostakhdemin Hosseini
- مشاهده