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RISS 인기검색어
- 검색키워드
- 저자 : Mohsen Soltanpour (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Optimization of Bottom Friction Coefficient Using Inverse Modeling in the Persian Gulf
Zahra Ranji,Mohsen Soltanpour 한국해양과학기술원 2021 Ocean science journal Vol.56 No.4
A practical method for the calibration of the ocean circulation model is introduced using measured water levels along the Persian Gulf coastlines. Dimensional analysis is employed to present a new Manning formulation as a function of water depth, mean velocity, vegetation, and bed sediment size. The ocean circulation model is configured by applying the pre-defined Manning formula, including empirical parameters. The direct minimization approach of data assimilation is then applied to find the optimum bottom friction distribution. MIKE21 and AUTOCAL modules of DHI are selected for simulation and optimization, respectively. The optimization method using spatially varying friction results in slight overall improvement of model outputs, compared to applying a constant friction. The bottom friction in shallow vegetated areas is significantly modified, which highlights the effect of the vegetation on bed resistance in shallow waters.
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Spatial Memory and Antioxidant Protective Effects of Raisin (Currant) in Aged Rats
Davoud Ghorbanian,Mohammed Gol,Mohsen Pourghasem,Jamshid Faraji,Kaveh Pourghasem,Nabiollah Soltanpour 한국식품영양과학회 2018 Preventive Nutrition and Food Science Vol.23 No.3
Diets rich in fruits and vegetables can prevent age-related diseases. This research was conducted to evaluate the effects of raisin consumption on the spatial memory and morphometric parameters of brain tissue in aging rats. Old rats (20 months of age) were divided into 2 groups: control and raisin, with 6 rats in each group. The raisin group received 6 g of raisins daily in addition to their food and water for 90 days. After treatments, all animals were evaluated by behavioral tests to assess spatial memory and learning alongside other tests including the ferric reducing antioxidant power (FRAP), malondialdehyde, and histological examinations. The results showed that there are significant differences in the Morris water task and passive avoidance learning of behavioral tests and biochemical tests (FRAP and thiobarbituric acid reactive substances) between the two groups. The histological study indicated that the cell count of the hippocampus, the diameter of the lateral ventricle, and area of the corpus callosum in the raisin group changed in comparison with the control group but they were not significant. The results demonstrated that raisins significantly raise antioxidant levels in blood and promotes cognitive and motor performance in aging rats.
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Numerical Study of Influencing Factors on Tidal Wave Propagation in the Persian Gulf
S. Mahya Hoseini,Mohsen Soltanpour 한국해양과학기술원 2022 Ocean science journal Vol.57 No.4
A 2D hydrodynamic model is employed to study the characteristics of tidal wave propagation in the Persian Gulf (PG). The study indicates that tidal waves propagate from the Arabian Sea and the Gulf of Oman into the PG through the Strait of Hormuz. The numerical model is first validated using the measured water levels and current speeds around the PG and the principal tidal constituents of Admiralty tide tables. Considering the intermediate width of the PG, in comparison to the Rossby deformation radius, the tidal wave propagates like a Kelvin wave on the boundaries. Whereas the continental shelf oscillation resonance of the basin is close to the period of diurnal constituents, the results show that the tide is mixed mainly semidiurnal. A series of numerical tests is also developed to study the various effects of geometry and bathymetry of the PG, Coriolis force, and bed friction on tidal wave deformation. Numerical tests reveal that the Coriolis force, combined with the geometry of the gulf, results in the generation of different amphidromic systems of diurnal and semidiurnal constituents. The configuration of the bathymetry of the PG, with a shallow zone at the closed end of the basin that extends along its longitudinal axis in the southern half (asymmetrical cross section), results in the deformations of incoming and returning tidal Kelvin waves and consequently the shifts of amphidromic points (APs). The bed friction also results in the movements of the APs from the centerline to the south border of the gulf.
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