Search published articles
Showing 5 results for Afrand
Volume 7, Issue 1 (Winter 2022)
Abstract
The purpose of this article is to provide simple and practical tips for pain care and management for patients with musculoskeletal pain during the Covid epidemic.
Volume 7, Issue 3 (Summer 2022)
Abstract
Aim: Stroke is the third leading cause of death after cardiovascular disease and cancer. Stroke causes disability in various forms in sufferers. It has been suggested that various pathological mechanisms are involved in causing this injury. Articles show that regular exercise is a way to treat stroke patients. One of the most common exercise therapy models is treadmill exercise.However, there is still controversy about when to start treadmill workouts, the intensity of the workout, the type of treadmill workout, and how it has positive effects. This article offers an overview of treadmill exercise and its’ effects on post-ischemic stroke rehabilitation. In this study, the effect of exercise time, exercise intensity, exercise style, and the positive effects of this type of exercise on rehabilitation of patients after ischemic stroke were briefly examined.
Volume 7, Issue 4 (Fall 2022)
Abstract
Musculoskeletal Disorders (MSDs) and pains are one of the most common and costly types of injuries that disrupt the function of the involved tissue/tissues, and the function of the affected person. Failure to pay proper attention to pain assessment can have an adverse effect on the patient, disease process, and treatment steps. In order to properly assess pain, one should have a selective and comprehensive perspective, including history taking, disease history, attention to clinical and paraclinical findings, the use of multidimensional quantitative and qualitative structured tools (to assess pain intensity, physical, emotional and social functions), and the use of health-related Quality of Life e (QoL) measurement tools. The purpose of this article is to present a new and brief approach to evaluate of musculoskeletal pain and related cases.
Hamed Eshgarf, Masoud Afrand, Mohammad Hemmat Esfe,
Volume 16, Issue 3 (5-2016)
Abstract
In this paper, the effects of temperature and nanoparticles volume fraction on the viscosity of non-Newtonian hybrid nanofluid, containing water and ethylene glycol as a base fluid and multi-walled carbon nanotubes (MWCNTs) and silica (SiO2) as additives, have been investigated experimentally. The measurements have been carried out in temperatures range of 27.5°C - 50°C by using a Brookfield DV-I PRIME digital Viscometer for different shear rates. The stable and homogeneous samples, with the solid volume fractions of 0.0625%, 0.25%, 0.5%, 0.75%, 1%, 1.5% and 2%, were prepared by dispersing the equal volumes of dry MWCNTs and SiO2 nanoparticles in a specified amount of the binary mixture of water/EG (50:50 %vol.). The measurement results at different shear rates showed that the base fluid possessed Newtonian behavior, while all nanofluid samples exhibit a pseudoplastic rheological behavior with a power law index of less than unity (n<1). Moreover, the consistency index and power law index have been obtained by accurate curve-fitting for all nanofluid samples. The results also revealed that the apparent viscosity generally increases with an increase in the solid volume fraction and decreases with temperature rising.
D. Mokhtari , M. Hojaji , M. Afrand ,
Volume 19, Issue 5 (May 2019)
Abstract
In this study, the effect of a cylindrical protuberance on the thrust vector of a supersonic jet was investigated as a new method in thrust vector control. For this purpose, a convergent-divergent nozzle was designed and constructed. This nozzle is such that the Mach number is its nominal output in full expansion conditions 2. The wall of the nozzle is equipped with pressurized holes to measure pressure variations. Also, there is a duct wall in the nozzle wall to apply a protuberance inside the nozzle. Pressure sensors for pressure measurement and also the schlieren system are used to check the outlet flow field. The total pressure of the compartment is constant at all tests and is 5.7bar. The results of this study show that the depth of penetration of the protuberance in the flow field has a significant effect on the amount of deviation and even the direction of the deviation of the jet stream exited from the convergent-divergent nozzle. The maximum jet outlet flow from the nozzle is 5.7degrees, which occurred at a rate of H/D*=0/4. In addition, these results indicate that with the increase in bulge penetration within the nozzle, the nozzle axial thrust has slightly decreased.
