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Dynamic Simulation of Volume Fraction and Density Solid Phase Effect on Phase Hold-Up in 3 Phase Fluidize Bed Column through CFD  [PDF]
Mohammad Ali Salehi, Ali Basiry
Engineering (ENG) , 2015, DOI: 10.4236/eng.2015.71003
Abstract: The gas-liquid-solid fluidized bed has emerged in recent years as one of the most promising devices for three-phase operation. Selection and design is one of them in parameter in the performance of three phase system. This paper focuses on volume fraction and density effect on the phases hold-up in a 3 phase fluidize bed column containing liquid phase with 100 cm height and 20 cm diameter, in this case the solid phase with 0.15, 0.25, 0.35 volume fraction and density 2470, 3000, 4000, 5000 m3 dispersion into liquid phase and the gas phase enter the column through a sparger of 2 cm diameter with 0.02 m/s velocities. The results show as the solid phase volume fraction increases from 0.02 to 0.08 m/s. The gas hold-up decreases and solid hold-up increases. Solid phase density increases, so solid phase hold-up decreases and gas hold-up decreases.
Effects of different levels of feeding of pistachio epicarp silage on wool characteristics of growing Afshari lambs  [PDF]
Mahnaz Salehi, Farhad Mirzaei, Ali Mahdavi
Agricultural Sciences (AS) , 2012, DOI: 10.4236/as.2012.33040
Abstract: Sixteen Afshari male lambs (mean live weight 35 ± 1.21 kg, 10 month of age) were used to study the effect of different levels of pistachio epicarp silage (0%, 8%, 17% and 25%) on wool characteristics. The fleece weight (FW), staple length on shoulder (STS), flank (STF), back (STB) and rump (STR), true wool fiber (TW), modulated fiber (MF), kemp fiber (KF) percentage, mean wool fiber diameter (MD) and its coefficient variation (CVMD), breaking load (BL), wool tenacity (WT) and extension (E) were measured. These data were analyzed by one-way ANOVA using SAS software package. The total mean of FW, STS, STB, STF STR; TW, MF, KF, MD, CVMD, BL, WT and E of wool were 1622.2 ± 0.2 gr, 6.20 ± 0.26 cm, 6.80 ± 0.20 cm, 6.50 ± 0.20 cm, 6.90 ± 0.20 cm, 63.30 ± 1.6 mu, 8.30 ± 1.6 mu, 28.40% ± 2.5%, 37.0 ± 0.9 mu, 47.02% ± 2.99%, 7.60 ± 0.3 kgf, 3.40 ± 0.2 gf/tex and 31.1% ± 1.7% respectively, although there was significant difference among treatments on FW, MF, KF, MD, BL and WT. The results showed that feeding lambs with 25% pistachio epicarp silage of total dry matter intake affected wool characteristics and its effect was similar with the control group.
Evaluation of Soil Physical and Chemical Properties in Poplar Plantations in North of Iran
Ali Salehi,Maryam Maleki
Ecologia Balkanica , 2012,
Abstract: Soil physical and chemical properties and some quantitative characteristics of Populus deltoides Marsh (clone 79.51) plantations and relationships between them were evaluated in Guilan plain of north of Iran. Two same aged poplar plantations with low and high qualities were selected. In each poplar plantation, fifteen sample plots with systematic sampling method were selected. In each sample plot diameter at breast height (DBH) as well as height of all trees within them was determined. Soil samples were taken from 0-20cm in each plot and soil texture, water holding capacity (WHC), bulk density (B.D) and particle density (P.D) as well as soil porosity, O.C, N, available P and exchangeable K were determined for each soil sample in laboratory. Tree data and soil properties between two plantations were analysed using independent samples t-test (Student’s t test at p < 0.05). The results showed that among soil physical properties, percentage of clay, sand, B.D and WHC and amongst soil chemical properties O.C, N, available P and exchangeable K were significantly different between two plantations. Heavy textured soils with high B.D are undesirable for growing of populus deltoides in study area. The results also indicated that poor quality plantations has negative effect on soil nutrient and reduces its fertility. Reduction of nutrient availability had negative effects on quantity and quality of poplar trees.
Firm Size, Audit Regulation and Fraud Detection: Empirical Evidence from Iran = Velikost podjetja, ureditev revidiranja in odkrivanje goljufij: empiriˇcni dokazi iz Irana
Mahdi Salehi,Ali Mansoury
Management , 2009,
Abstract: An auditor has the responsibility for the prevention, detection and reporting of fraud. Illegal acts and errors are the most controversial issues in auditing, and have been the most frequently debated areas amongst auditors, politicians, media, regulators and the public. Prior research has documented a positive association between audit quality and auditor size. While some studies have used the audit fee as a surrogate for audit quality, other studies have employed more direct measures, such as the outcomes of quality control reviews. Those latter studies, however, used samples that suffer from severe geographic or client-type restrictions. Moreover, most studies of the quality-size relationship have focused on relatively large cpa firms. By the way, in recent years there has been considerable debate about the nature of audit practice (Salehi 2007). Auditors also have responsibility for ensuring the accuracy and precision of statements prepared by managers.
Modeling of Daptomycin Release from Medium-Dose Daptomycin-Xylitol-Loaded PMMA Bone Cements  [PDF]
Ali Salehi, Gladius Lewis, Ashley Cox Parker, Warren O. Haggard
Journal of Biomedical Science and Engineering (JBiSE) , 2014, DOI: 10.4236/jbise.2014.76037
Abstract: Antibiotic-loaded poly (methyl methacrylate) bone cements (ALPBCs) are widely used as an agent to decrease the occurrence of periprosthetic joint infection (PJI). Most often, the antibiotic used in an ALPBC is gentamicin, tobramycin, or vancomycin. In many recent clinical studies, it has been reported that the pathogens that commonly present in PIJ are becoming resistant to these antibiotics. As such, a new generation of antibiotics is emerging, among which is daptomycin. Literature reports with a clinically relevant medium-dose daptomycin-loaded cement show that the daptomycin release rate from cylindrical specimens is low. Incorporation of a poragen, such as dextrose, glycine, or particulate xylitol, into the cement powder has been shown to be an effective way to increase daptomycin release rate. There are, however, no studies on modeling of daptomycin release from specimens of either a daptomycin-loaded cement or a daptomycin-poragen-loaded cement. In the present work, we determine the profiles of daptomycin release from cylindrical medium-dose daptomycin-xylitol-loaded cement specimens, as a function of the particulate xylitol loading. We used these results and relationships that have been shown to model antibiotic release from ALPBC specimens to obtain the best-fit relationship for the present cements. Through this approach, we demonstrated that, regardless of the xylitol loading, the daptomycin release profile is a mixture of initial burst followed by a slow Fickian diffusion.
Impact of the corporate governance characteristics and ownership on earnings quality of the Islamic private banks in Iran
Mohammad Khodaei Valahzaghard,Ali Salehi
Management Science Letters , 2012,
Abstract: This paper investigates corporate governance and ownership effects on earning quality in Iranian private banks. The study uses the information of 12 private banks from year 2005 to 2010 using regression analysis based on panel data. Among different factors, the effect of big five shareholder are considered to be significant and positive on earning quality. In addition, the effect of one variable regression test reveals that institutional ownership has positive impact on earning quality. However, the impacts of other variables including percentage of ownership concentration, the size of board of directors, reliance on debt, logarithm of sum of assets, return of assets, logarithm of operating cash flow on earning quality are not meaningful. The result of this survey indicates that institutional ownership plays an important role earning quality simply because institutions normally have the access on professionals to control management.
Fruit and vegetables intake among elderly Iranians: a theory-based interventional study using the five-a-day program
Leili Salehi, Kazem Mohammad, Ali Montazeri
Nutrition Journal , 2011, DOI: 10.1186/1475-2891-10-123
Abstract: This quasi-experimental study was performed among a community-based sample of elderly in Tehran, Iran in year 2008 to 2009. Data were collected at baseline and 4 weeks follow-up. At baseline face-to-face interviews were conducted using a structured questionnaire including items on demographic information, stages of change, self-efficacy, decisional balance, daily servings of FV intake. Follow-up data were collected after implementing the intervention.In all 400 elderly were entered into the study (200 individuals in intervention group and 200 in control group). The mean age of participants was 64.06 ± 4.48 years and overall two-third of participants were female. At baseline total FV intake was not differed between two groups but it was significantly increased in the intervention group at posttest assessment (mean serving/day in intervention group 3.08 ± 1.35 vs. 1.79 ± 1.08 in control group; P = 0.001). Further analysis also indicated that elderly in intervention group had higher FV intake, perceived benefits and self-efficacy, and lower perceived barriers. Compared with control group, greater proportions of elderly in intervention group moved from pre-contemplation to contemplation/preparation and action/maintenance stages (P < 0.0001), and from contemplation/preparation to action/maintenance stages (P = 0.004) from pretest to posttest assessments.This study suggests that the Transtheoretical Model is a useful model that can be applied to dietary behavior change, more specifically FV consumption among elderly population in Iran and perhaps elsewhere with similar conditions.Adequate FV intakes could decrease risk of various chronic diseases such as cancers, cardiovascular disease, diabetes, and stroke [1-6]. The World Health Organization (WHO) dietary guideline recommends the minimum 5-a-day consumption of FV [7]. Individuals have not, as yet, adopted the minimum recommendations to consume five servings of FV per day in spite of all the benefits of FV on improving h
Comparison of Plant Diversity and Stand Characteristics in Alnus subcordata C.A.Mey and Taxodium distichum (L.) L.C. Rich
Masoud Tabari,Abdollah Rostamabadi,Ali Salehi
Ecologia Balkanica , 2011,
Abstract: Stand characteristics and understory plant diversity were investigated in low-drained man-made stands of Alnus subcordata C.A.Mey and Taxodium distichum (L) L.C. Rich. The trees were planted with distances of 3 × 3 m and 4 × 4 m in northern Iran. In these stands, herbaceous and woody species were counted in plots of 20 × 20 m. Then, indexes of richness, H/ diversity, J/ equitability and Jaccard similarity (JI), tree growths, cover crown percentage, and litter layer thickness of each stand were assessed following 17 years after planting. The results revealed that the greatest diameter at breast height (D.B.H) and stem height were observed in Alnus 4 × 4 m. By contrast, crown cover percentage and litter thicknesses were greater in Taxodium stands. Species richness, H/ diversity and J/ equitability indexes, Jaccard similarity (JI) of Alnus stands were greater than those of Taxodium stands. In reality, small and light canopy of Alnus is the main reason that the solar radiation can penetrate easily to forest ground and affect understory plant diversity. Alnus as a native tree species, due to greater growth attributes and higher diversity indices in their stands are proposed for plantations in such low-drained sites of northern Iran.
Audit Independence and Expectation Gap: Empirical Evidences from Iran
Mahdi Salehi,Ali Mansoury,Zhila Azary
International Journal of Economics and Finance , 2009, DOI: 10.5539/ijef.v1n1p165
Abstract: This paper discusses about auditor independence and audit expectation gap. An independent auditor is essential because of the separation of ownership from the management; the independent factor is the foundation of the public accounting profession and upon its maintenance depend the profession’s strength and its stature. Independence is fundamental to the reliability of auditors’ reports. The causes for reducing independence are economic dependence of the auditor on the client; audit market competition; the provision of non-audit services (NAS); the regulatory framework. Due to these causes auditors are not able to produce a fair report. Therefore “auditor independence is a key element of the audit expectation gap”. If auditors are independent it reduces the expectation gap.
Banking Crisis: Empirical Evidence of Iranian Bankers
Mahdi Salehi,Ali Mansouri,Reza Pirayesh
Pakistan Journal of Commerce and Social Sciences , 2009,
Abstract: It is generally understood that well functioning banks and financial institutions help promote economic growth. That’s why Iranian government is trying to play active role to promote economic growth through well established banking and financial system. This survey shows that after interference of Iranian government in banking sector the going concern of Iranian banks became sustainable. However, the interference raises higher level of inflation in Iranian economy.
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