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| 1 | Aerodynamic drag reduction of heavy vehicles using append devices by CFD analysis显示文摘Improving vehicle fuel consumption,performance and aerodynamic efficiency by drag reduction especially in heavy vehicles is one of the indispensable issues of automotive industry.In this work,the effects of adding append devices like deflector and cab vane corner on heavy commercial vehicle drag reduction were investigated.For this purpose,the vehicle body structure was modeled with various supplementary parts at the first stage.Then,computational fluid dynamic(CFD) analysis was utilized for each case to enhance the optimal aerodynamic structure at different longitudinal speeds for heavy commercial vehicles.The results show that the most effective supplementary part is deflector,and by adding this part,the drag coefficient is decreased considerably at an optimum angle.By adding two cab vane corners at both frontal edges of cab,a significant drag reduction is noticed.Back vanes and base flaps are simple plates which can be added at the top and side end of container and at the bottom with specific angle respectively to direct the flow and prevent the turbulence.Through the analysis of airflow and pressure distribution,the results reveal that the cab vane reduces fuel consumption and drag coefficient by up to 20 % receptively using proper deflector angle.Finally,by adding all supplementary parts at their optimized positions,41% drag reduction is obtained compared to the simple model. | Mehrdad khosravi Farshid Mosaddeghi Majid Oveisi Ali Khodayari Bavil | 2015 | Journal of Central South University2015，22，12： | 15 |
| 2 | Soil Organic Carbon Pools in Particle-Size Fractions as Affected by Slope Gradient and Land Use Change in Hilly Regions,Western Iran显示文摘This study was conducted to explore the effects of topography and land use changes on particulate organic carbon(POC),particulate total nitrogen(PTN),organic carbon(OC) and total nitrogen(TN) associated with different size primary particle fractions in hilly regions of western Iran.Three popular land uses in the selected site including natural forest(NF),disturbed forest(DF) and cultivated land(CL) and three slope gradients(0-10 %,S1,10-30 %,S2,and 30-50%,S3) were employed as the basis of soil sampling.A total of 99 soil samples were taken from the 0-10 cm surface layer in the whole studied hilly region studied.The results showed that the POC in the forest land use in all slope gradients was considerably more than the deforested and cultivated lands and the highest value was observed at NF-S1 treatment with 9.13%.The values of PTN were significantly higher in the forest land use and in the down slopes(0.5%) than in the deforested and cultivated counterparts and steep slopes(0.09%) except for the CL land use.The C:N ratios in POC fraction were around 17-18 in the forest land and around 23 in the cultivated land.In forest land,the silt-associated OC was highest among the primary particles.The enrichment factor of SOC,EC,was the highest for POC.For the primary particles,EC of both primary fractions of silt and clay showed following trend for selected land uses and slope gradients:CL> DF> NF and S3 > S2> S1.Slope gradient of landscape significantly affected the OC and TN contents associated with the silt and clay particles,whereas higher OC and TN contents were observed in lower positions and the lowest value was measured in the steep slopes.Overall,the results showed that native forest land improves soil organic carbon storage and can reduce the carbon emission and soil erosion especially in the mountainous regions with high rainfall in west of Iran. | Parisa Mokhtari KARCHEGANI Shamsollah AYOUBI Mohammad Reza MOSADDEGHI Naser HONARJOO | 2012 | Journal of Mountain Science2012，9，1： | 10 |
| 3 | Aging: A cell source limiting factor in tissue engineering显示文摘Tissue engineering has yet to reach its ideal goal,i.e.creating profitable off-theshelf tissues and organs,designing scaffolds and three-dimensional tissue architectures that can maintain the blood supply,proper biomaterial selection,and identifying the most efficient cell source for use in cell therapy and tissue engineering.These are still the major challenges in this field.Regarding the identification of the most appropriate cell source,aging as a factor that affects both somatic and stem cells and limits their function and applications is a preventable and,at least to some extents,a reversible phenomenon.Here,we reviewed different stem cell types,namely embryonic stem cells,adult stem cells,induced pluripotent stem cells,and genetically modified stem cells,as well as their sources,i.e.autologous,allogeneic,and xenogeneic sources.Afterward,we approached aging by discussing the functional decline of aged stem cells and different intrinsic and extrinsic factors that are involved in stem cell aging including replicative senescence and Hayflick limit,autophagy,epigenetic changes,miRNAs,mTOR and AMPK pathways,and the role of mitochondria in stem cell senescence.Finally,various interventions for rejuvenation and geroprotection of stem cells are discussed.These interventions can be applied in cell therapy and tissue engineering methods to conquer aging as a limiting factor,both in original cell source and in the in vitro proliferated cells. | Mohammadhossein Khorraminejad-Shirazi Mohammadreza Dorvash Alireza Estedlal Amir Human Hoveidaei Mohsen Mazloomrezaei Pouria Mosaddeghi | 2019 | World Journal of Stem Cells2019，11，10： | 4 |
| 4 | Soil Atterberg Limits and Consistency Indices as Influenced by Land Use and Slope Position in Western Iran显示文摘Atterberg limits and consistency indices are used for classifications of cohesive(fine-grained) soils in relation with compaction and tillage practices. They also provide information for interpreting several soil mechanical and physical properties such as shear strength, compressibility, shrinkage and swelling potentials. Although, several studies have been conducted regarding the land use effects on various soil mechanical properties, little is known about the effects of land use and slope positions on Atterberg limits and consistency indices. This study was conducted to investigate the effects of land use and slope position on selected soil physical and chemical properties, Atterberg limits and consistency indices in hilly region of western Iran. Three land uses including dryland farming, irrigated farming and pasture and four slope positions(i.e., shoulder, backslope, footslope, and toeslope) were used for soil samplings. One hundred eleven soil samples were collected from the surface soil(0-10 cm). Selected physical and chemical properties, liquid limit(LL), plastic limit(PL) and shrinkage limit(SL) were measured using the standard methods; and consistency indices including plastic index(PI), friability index(FI), shrinkage index(SI) and soil activity(A=PI/clay) were calculated. The results showed that irrigated farming significantly increased organic matter content(OM) and OM/clay ratio, and decreased bulk density(ρb) and relative bulk density(ρb-rel) as a result of higher biomass production and plant residues added to the soil compared to other land uses. Except for sand content, OM, ρb, cation exchange capacity(CEC) and calcium carbonate equivalent(CCE), slope position significantly affected soil physical and chemical properties. The highest values of silt, OM/clay and CEC/clay were found in the toeslope position, predominantly induced by soil redistribution within the landscape. The use of complexed(COC)- noncomplexed organic carbon(NCOC) concept indicated that majority of the studied soils were located below the saturation line and the OM in the soils was mainly in the COC form. The LL, PI, FI and A showed significant differences among the land uses; the highest values belonged to the irrigated farming due to high biomass production and plant residues returned to the soils. Furthermore, slope position significantly affected the Atterberg limits and consistency indices except for SL. The highest values of LL, PI, SI and A were observed in the toeslope position probably because of higher OM and CEC/clay due to greater amount of expandable phyllosilicate clays. Overall, soils on the toeslope under irrigated farming with high LL and SI and low values of FI need careful tillage management to avoid soil compaction. | Zahra ZOLFAGHARI Mohamamd Reza MOSADDEGHI Shamsollah AYOUBI Hamid KELISHADI | 2015 | Journal of Mountain Science2015，12，6： | 2 |
| 5 | Soil compactibility as affected by soil moisture content and farmyard manure in central Iran 显示文摘 | Mosaddeghi M R Hajabbasi M A Hemmat A | 2000 | Soil Tillage Res2000，55，： | 1 |
| 6 | Soil water a-vailability for plants as quantified by conventional availabl ewater,leastlimiting water range and integral water capacity显示文摘 | ASGARZADEH H MOSADDEGHI M R MAHBOUBI A A | 2010 | Plant and Soil2010，335，： | 1 |
| 7 | Tensile strength of sand, palygorskite and calcium carbonate mixtures and interpretation with the effective stress the- ory显示文摘 | MOSADDEGHI M R HAJABBASI M A | 2006 | Geoderma2006，134，： | 1 |
| 8 | Short-term effects of tillage and manure on some soil physical properties and maize root growth in a sandy loam soil in western Iran显示文摘 | M.R. Mosaddeghi A.A. Mahboubi A. Safadoust | 2008 | Soil & Tillage Research2008，，1： | 1 |
| 9 | Lightning electromagnetic fields at very close distanceassociated with lightning strikes to the Gaisberg tower显示文摘 | MOSADDEGHI A SHOORY A RACHIDI F | 2010 | J Geophys Res2010，115，17： | 1 |
| 10 | Effect of nearby buildings on electromagnetic fields from lightning 显示文摘 | MOSADDEGHI A PAVANELLO D RACHIDI F | 2009 | Journal of Lightning Research2009，，1： | 1 |
| 11 | Soil aggregation and organic carbon as affected by topography and land use change in western Iran显示文摘 | Shamsollah Ayoubi Parisa Mokhtari Karchegani Mohammad Reza Mosaddeghi Naser Honarjoo | 2012 | Soil & Tillage Research2012，，： | 1 |
| 12 | Short-term effects of tillage and manure on some soil physical properties and maize root growth in a sandy loam soil in western Irma显示文摘 | Mosaddeghi M R Mahboubi A A Safadoust A | 2009 | Soil and Tillage Research2009，104，1： | 1 |
| 13 | Suitability of pre-compression stress as the real critical stress of unsaturated agricultural soils显示文摘 | M.R. Mosaddeghi A.J. Koolen M.A. Hajabbasi A. Hemmat T. Keller | 2007 | Biosystems Engineering2007，，1： | 1 |
| 14 | Varia-tion of soil microbial biomass C and hydrolytic enzyme activitiesin a rangeland ecosystem: are slope aspect and position effective?显示文摘 | NAHIDAN S NOURBAKHSH F MOSADDEGHI M R | 2015 | Archives of Agronomy and Soil Science2015，61，6： | 1 |
| 15 | Short- term effects of tillage and manure on some soil physical properties and maize root growth in a sandy loam soil in western Iran 显示文摘 | Mosaddeghi M R Mahboubi A A Safadoust A | 2009 | Soil & Tillage Research2009，104，1： | 1 |
| 16 | Laboratory evaluation of a model for soil crumbling for pre- diction of the optimum soil water content for tillage 显示文摘 | Mosaddeghi M R Morshedizad M Mahboubi A A | 2009 | Soil and Tillage Research2009，105，2： | 1 |
| 17 | Short-term effects of tillage and manure on some soil physical properties and maize root growth in a sandy loam soil in western Iran 显示文摘 | Mosaddeghi M R Mahboubi A A Safadoust A | 2009 | Soil and Tillage Research2009，104，1： | 1 |
| 18 | Plate sinkage versus confined compression tests for in situ soil compressibility studies显示文摘 | Mosaddeghi M R Hemmat A Hajabbasi M A | 2006 | Biosystems Engineering2006，93，3： | 1 |
| 19 | Comparisons of different procedures of pre-compaction stress determination on weakly structured soils显示文摘 | Mosaddeghi M R Koolen A J Hemmat A | 2006 | Journal of Terramechanics2006，44，： | 1 |
| 20 | Evaluation of the efficiency of irrigation methods on the growth and survival of tree seedlings in an arid climate显示文摘Scarce and scattered precipitation in arid regions is detrimental for newly planted seedlings.It is essential to provide required water storage for seedlings in restoration projects in the first year of their establishment.The subsurface irrigation can be much more effective than the surface irrigation because of the regulation of water availability and reduction in water evaporation.We studied the effect of surface and subsurface irrigation methods on the growth and survival of four common tree species including heaven tree(Ailanthus altissima(Mill.)Swingle),China berry(Melia azedarach L.),white mulberry(Morus alba L.),and black locust(Robinia pseudoacacia L.)by installing underground clay reservoirs with different permeabilities in Isfahan City,Iran.Different amounts of animal manure and wheat straw were mixed with clay fraction and cooked in a pottery kiln at 900°C to produce reservoirs with different permeabilities.The experimental treatments consisting of irrigation and tree species were considered with a factorial arrangement in a completely randomized design with three replications in 2016 and 2017.Leaf water potential of seedlings,which is indirectly related to drought resistance,was measured by a portable pressure chamber.The results showed that saplings height,basal diameter,number of leaves,chlorophyll content and stomatal conductance were significantly(P<0.05)higher in the subsurface irrigation with low permeability than in the surface irrigation,but the number of branches of the studied species were not significantly(P>0.05)affected by the irrigation methods and different permeabilities of clay reservoirs.The clay reservoirs with low and medium permeabilities constantly provide better conditions for plant growth,and water with lower pressure and longer time intervals to the plant roots as compared with the reservoirs with high permeability.Analysis of variance of the data showed that year and interaction between year and permeability of reservoir had significant effects(P<0.05)on all growth parameters,except for the chlorophyll content.In addition,the highest percentage of survival was 100%associated with the subsurface irrigation and the control treatment had the lowest survival percentages of 60%,70%,80%and 100%for M.alba,M.azedarach,A.altissima and R.pseudoacacia,respectively.Finally,the values of leaf water potential showed that R.pseudoacacia was the most drought resistant species. | Zahra JAFARI SayedHamid MATINKHAH Mohammad R MOSADDEGHI Mostafa TARKESH | 2020 | Journal of Arid Land2020，12，3： | 1 |
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