31 research outputs found
A long-term "memory" of HIF induction in response to chronic mild decreased oxygen after oxygen normalization
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Numerical Simulation of Groundwater Table Falling in Horizontal and Sloping Aquifers by Differential Quadrature Method (DQM)
Full text linkA Comparison between Respiratory Factors in Patients with Vocal Nodule and Normal Controls
No full text• Background:Speech is the most important communication tool and is the smooth product of four systems: respiratory, phonatory, resonatory, and articulatory. Currently, a variety of voice disorder occurred because of life style and environmental pollutants. Vocal nodule is one of the most prevalent disorders in this category. Considering the point that the air required for vocal cords vibration is supplied by respiratory system and we repeatedly confront with inappropriate respiratory factors in patients with vocal nodules, this study was carried out to compare respiratory factors in patients with vocal nodule and normal controls.
• Materials and Methods:In this study, 14 patients with vocal nodule and 7 healthy subjects referred from a medical specialist were examined. Vital capacity, vital volume and tidal volume of patients and controls were measured by PCLX, LX-strobe and ST 1 dysphonia while making voice with high, normal and low frequencies. The data were analyzed using Fisher and Mann-Withny tests.
• Results:The results showed that there was significant difference between patients with vocal nodule and healthy controls on all measured factors. However, there was no relationship between family background and vocal nodule.
• Conclusion:Patients with vocal nodule do not seem to have problem with the volume of their lungs. Probably high tension in their respiratory muscles during speaking causes them not to be able to use the full capacity of their lungs and this creates a short of tidal volume and as a result, a problem in their phonatory system, i.e., vocal nodule. Because of small sample size, we need to be cautious in generalizing the results.
• Key words: Vocal nodule, respiratory factors, phonatory syste
Evaluating Students’ attitudes and usage e of mobile in educational activities at Paramedical Sciences School
Full text linkIntroduction: Mobile learning is a new way of modern teaching method and a subset of e-learning that refers to a change in thinking about the design and planning of learning goals and environments. The purpose of this study was to investigate the attitude of students of the Medical Sciences School toward the mobile phone in educational activities and its usage.
Methods: 150 students of Mashhad School of Paramedical Sciences were investigated in this cross-sectional study in 2019-20, using a researcher-made questionnaire including three sections on student demographic information, mobile applications in education, and student attitude toward mobile phone use in educational activities. The questionnaire`s validity was obtained according to 7 experts' opinions in the field of education, and its reliability was calculated using Cronbach's alpha of 0.794. Data were analyzed by descriptive and analytical statistics using SPSS 16 software.
Result: From the investigation of 150 students of Mashhad Paramedical Sciences opinions in six educational groups indicated that students of health information technology, laboratory science, physiotherapy, ophthalmology, radiology, speech therapy, medical records, mostly used mobile phones for their educational activities respectively. The most common use of students' mobile phones at university was the use of the Internet and social networks, taking photos and videos, and the most common use in teaching activities was reading files, viewing scores, recording audio and selecting units. From the students' perspective, using mobile phones in educational activities leads to getting higher scores, doing activities faster, make better communication between teacher and student, and speeded up the learning feedback.
Conclusion: According to the results, we suggest encouraging teachers to use mobile phones in academic activities and running workshops to increase the awareness of mobile capabilities. Also educational planners, and mobile based learning programs should design educational software to promote the correct culture of mobile use in educational activities.</jats:p
محاسبه ی بازگشتی مدول کشسانی لایههای روسازی به روش ترکیبی دیفرانسیل کوادرچر و الگوریتم بهینهسازی جستجوی هارمونی
No full textThe evaluation of pavements being utilized using falling weight deflectometer (FWD) is one of the most important components of the pavement management system in many countries. The computation of pavement layer properties to estimate the remaining life of the pavement and also pavement maintenance has always been of interest to road pavement researchers and engineers. On the other hand, the back-calculation is widely used for the estimation of the pavement layer properties. In most back-calculation methods, the commercial software such as ABAQUS, ANSYS, etc., are used as numerical simulation engine. But it is difficult to integrate them with the optimization engine and consequently, they require the pre-generated artificial analytical data for search space. ubsequently, much computational time due to the large number of iterations is required. In this paper, the differential quadrature method (DQM) is employed to analyze the pavement. By combining this method with harmony search (HS) optimization algorithm, a computationally efficient model is developed for calculation of surface deflections so that it significantly reduces the overall computational time for back-calculation. As an application of the proposed hybrid differential quadrature method and harmony search (DQ-HS) optimization algorithm, a numerical example for back-calculation of elastic modulus of a three-layer pavement structures is presented. The results of this study with different populations show that this method can be used to calculate the elastic modulus of the layers in less than 20 iterations. To demonstrate the efficiency of the optimization algorithm for harmonic search and the convergence independence of optimal solutions, the problem with 10 populations and repetition of 20 is performed 10 times with a series of random numbers. The results indicate that the independence of the method of optimization from random values. Fast convergence, high precision and low computational cost are the advantages of this proposed method to estimate
unknown parameters of a multilayer structure, including pavement structure
