| 1. |
- Aslani, H., et al.
(författare)
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Iranian Joint Registry (Iranian National Hip and Knee Arthroplasty Registry)
- 2016
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Ingår i: Archives of Bone and Joint Surgery-Abjs. - 2345-4644. ; 4:2, s. 192-196
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Tidskriftsartikel (refereegranskat)abstract
- Periodic evaluation and monitoring the health and economic outcome of joint replacement surgery is a common and popular process under the territory of joint registries in many countries. In this article we introduce the methodology used for the foundation of the National Iranian Joint Registry ( IJR) with a joint collaboration of the Social Security Organization (SSO) and academic research departments considering the requirements of the Iran's Ministry of Health and Education.
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| 2. |
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| 3. |
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| 4. |
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| 5. |
- Braide, M, et al.
(författare)
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Migration of human granulocytes in filters: effects of gravity and movable gradients of f-MLP
- 1994
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Ingår i: Biorheology. - THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB : PERGAMON-ELSEVIER SCIENCE LTD. - 0006-355X .- 1878-5034. ; 31:6, s. 617-630
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Tidskriftsartikel (refereegranskat)abstract
- The Boyden chamber technique for chemotaxis uses a mesh filter that constitutes a matrix for cell locomotion and, at the same time, creates a local restriction for convective fluid movements that allows the establishment of a diffusive concentration gradient of chemotactic substance in the filter. In the present study, the Boyden chamber was modified by the introduction of a filter sandwich that allowed cell migration both upwards and downwards and by the use of a fluid density gradient controlling cell buoyancy and mechanically supporting a movable chemotactic gradient. This method was used to study chemotaxis and random migration of human granulocytes under the influence of gravitational forces and movable gradients of f-MLP. The results show that gravity affected cell motion significantly during random migration but not during chemotaxis. The rate of chemotactic migration was dependent on the steepness of the spatio-temporal f-MLP gradients. A stationary spatial gradient produced less migration than a gradient that was slowly moved through the filter sandwich in a direction opposite to that of the cell migration. The presence of f-MLP at constant concentration caused a minor, statistically insignificant, increase of the rate of random migration.
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| 6. |
- Djalili-Moghaddam, M, et al.
(författare)
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Study of geometry effects in torsional rheometry of fibre suspensions
- 2004
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Ingår i: Rheologica Acta. - : Springer-Verlag. - 0035-4511 .- 1435-1528. ; 44:44, s. 29-37
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Tidskriftsartikel (refereegranskat)abstract
- This work concerns the problem of measuring the viscosity of a suspension of fibres that are not short compared to the dimensions of the measurement device. We have examined various geometry effects in shear using parallel-plate and cone-and-plate configurations. Steady state viscosity, transient viscosity and first normal stress difference have been studied. Silicone oil with milled glass fibres at 8 vol.% was used as a model fibre suspension. The conventional parallel-plate geometry exhibits a significant gap dependence of the apparent viscous response. Too small gaps constrain the fibre rotations, thus lowering the initial stress peak and delaying the development of steady state. Too large gaps lead to a loss of liquid at the sample perimeter, which reduces the apparent steady state viscosity. The steady state response, however, seems to be correct for gaps in the range 1 - 2 mm when the maximum fibre length is 1.5 mm. The cone-and-plate geometry is less sensitive to large gaps. Too small a gap at the ( truncated) cone apex leads to anomalous response due to bridging of the gap by fibres. The use of unusually large plates ( 100 mm diameter) and different cone angles and truncations was explored. It was shown that cone-and-plate configurations of large diameter and large truncation can effectively decrease the geometry disturbances both due to fibre bridging at the cone apex and loss of liquid at the edge.
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| 7. |
- Djalili-Moghaddam, M., et al.
(författare)
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Study of geometry effects in torsional rheometry of fibre suspensionsIs The “Creative Class” Necessarily Urban?
- 2004
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Ingår i: Rheologica Acta. - : Springer Science and Business Media LLC. - 0035-4511 .- 1435-1528. ; 44:1, s. 29-37
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Tidskriftsartikel (refereegranskat)abstract
- This work concerns the problem of measuring the viscosity of a suspension of fibres that are not short compared to the dimensions of the measurement device. We have examined various geometry effects in shear using parallel-plate and cone-and-plate configurations. Steady state viscosity, transient viscosity and first normal stress difference have been studied. Silicone oil with milled glass fibres at 8 vol.% was used as a model fibre suspension. The conventional parallel-plate geometry exhibits a significant gap dependence of the apparent viscous response. Too small gaps constrain the fibre rotations, thus lowering the initial stress peak and delaying the development of steady state. Too large gaps lead to a loss of liquid at the sample perimeter, which reduces the apparent steady state viscosity. The steady state response, however, seems to be correct for gaps in the range 1-2 mm when the maximum fibre length is 1.5 mm. The cone-and-plate geometry is less sensitive to large gaps. Too small a gap at the (truncated) cone apex leads to anomalous response due to bridging of the gap by fibres. The use of unusually large plates (100 mm diameter) and different cone angles and truncations was explored. It was shown that cone-and-plate configurations of large diameter and large truncation can effectively decrease the geometry disturbances both due to fibre bridging at the cone apex and loss of liquid at the edge.
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| 8. |
- Ebrahimzadeh, I., et al.
(författare)
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Progressing urban development and life quality simultaneously
- 2016
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Ingår i: City, Culture and Society. - : Elsevier. - 1877-9166 .- 1877-9174. ; 7:3, s. 186-193
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Tidskriftsartikel (refereegranskat)abstract
- This research is on planning and managing of the cities for an improved urban life quality and it shows a novelty when it is investigating indicators of the life quality and urban planning outcomes jointly. This paper presumes that the improvement of life quality indicators will progress the urban planning and management outcomes mutually. It reviews the literature to exhibit an overall picture of association between urban planning and urban quality of life. The purpose of the study is to assess the weight scores of the life quality indicators with the use of classic methods. The paper finds various score numbers for the life quality in 26 districts of Maragheh regarding the rate of urban development in each neighborhood and shows how the indicators of the life quality vary values and efficiency in different urban neighborhoods. The results show a positive correlation between the indicators of the life quality and the level of success in urban planning and development. In another word, this study contributes to improve the life quality and urban planning jointly in the underdeveloped cities. The model of life quality-oriented urban planning is applicable in any city similar to the situation of Maragheh city.
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| 9. |
- Ebrahimzadeh, PR, et al.
(författare)
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A subpopulation analysis of f-MLP stimulated granulocytes migrating in filters
- 1996
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Ingår i: Biorheology. - : IOS Press. - 0006-355X .- 1878-5034. ; 33:3, s. 231-250
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Tidskriftsartikel (refereegranskat)abstract
- Leukocyte migration in vitro has been studied extensively during many years without providing satisfactory theoretical models for the different migratory behaviors (chemotaxis and chemokinesis) of leukocyte populations. The present study utilized the fluid gradient chamber, which is a new method to study leukocyte migration in filters. Human neutrophils were applied between two stacked filters and migrated in all directions under the influence of constant concentrations or chemotactic gradients of f-MLP, maintained in fluid phase density gradients. The distributions of the granulocytes over filter depth were fitted to theoretical functions composed by 1-3 Gaussian distributions, representing subpopulations. The results showed that the neutrophils migrated as two discrete subpopulations during chemokinetic stimulation (a constant concentration of f-MLP). One of the subpopulations showed less active and passive (slow sedimentation under the influence of gravity) translocation. The most mobile subpopulation was divided into two new subpopulations when exposed to chemotactic stimulation (concentration gradient of f-MLP), one of which responded chemotactically and one of which migrated in random directions. The properties of the different subpopulations where characterized in terms of diffusion coefficient (random migration), convection velocity (chemotactic migration) and sedimentation coefficient (passive translocation).
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