Large Eddy Simulation-Based Analysis of Entropy Generation in a Turbulent Nonpremixed Flame

LES (large eddy simulation) is employed for prediction and analysis of entropy generation in turbulent combustion. The entropy transport equation is considered in LES. This equation contains several unclosed entropy generation terms corresponding to irreversible processes: heat conduction, mass diffusion, chemical reaction and viscous dissipation. The SGS (subgrid scale) closure of these effects is provided by a methodology termed the En-FDF (entropy filtered density function), which contains complete statistical information about SGS variation of scalars and entropy. In the En-FDF, the effects of chemical reaction and its associated entropy generation appear in closed forms. The methodology is applied for LES of a nonpremixed jet flame. Predictions show good agreements with the experimental data. Analysis of entropy generation shows that heat conduction and chemical reaction are the main sources of irreversibility in this flame. The sensitivity of individual entropy generation effects to turbulence intensity is studied

The Association between Religious Belief and Drug Adherence Mediated by Religious Coping in Patients with Mental Disorders

Introduction: Adherence to drug regimen is an important factor in the treatment of patients with mental disorders. In some studies, religious beliefs have been shown to be effective for treatment adherence. This study aimed to investigate the association between religious beliefs and adherence to the medication regimen mediated by religious coping in patients with mental disorders. Methods: In this cross‑sectional study, 164 patients with mental disorders were selected through convenient sampling from educational centers in Qazvin city. Data were collected using a demographic questionnaire, March Drug Adherence Questionnaire, Santaklara’s Religious Faithfulness questionnaire, and Pargament Religious Coping questionnaire. Data were expressed as mean ± standard deviation and analyzed using descriptive and inferential statistics. Results: The mean age of the patients was 38.87 ± 14.42 years. The mean duration of the disease was 5.71 ± 5.78 years. The mean of the religious belief score was 30.90 ± 5.96, the mean of the negative religious coping score was 2.17 ± 2.94, and the mean of positive religious coping score was 6.83 ± 4.69. There was a significant positive correlation between religious beliefs, adherence to medication regimen, and positive religious coping. There was a significant negative correlation between religious beliefs, adherence to medication regimen, and negative religious coping. Conclusion: There was a significant positive correlation between religious beliefs and adherence to medication regimen in patients with mental disorders. Religious beliefs were directly associated with positive religious coping, and adherence to medication regimen was indirectly associated with negative religious confrontation

Progress in the Prediction of Entropy Generation in Turbulent Reacting Flows Using Large Eddy Simulation

An overview is presented of the recent developments in the application of large eddy simulation (LES) for prediction and analysis of local entropy generation in turbulent reacting flows. A challenging issue in such LES is subgrid-scale (SGS) modeling of filtered entropy generation terms. An effective closure strategy, recently developed, is based on the filtered density function (FDF) methodology with inclusion of entropy variations. This methodology, titled entropy FDF (En-FDF), is the main focus of this article. The En-FDF has been introduced as the joint velocity-scalar-turbulent frequency-entropy FDF and the marginal scalar-entropy FDF. Both formulations contain the chemical reaction and its entropy generation effects in closed forms. The former constitutes the most comprehensive form of the En-FDF and provides closure for all of the unclosed terms in LES transport equations. The latter is the marginal En-FDF and accounts for entropy generation effects, as well as scalar-entropy statistics. The En-FDF methodologies are described, and some of their recent predictions of entropy statistics and entropy generation in turbulent shear flows are presented

Parallelism Exploration in B2C and B2B Systems

As the e-commerce sites are being more secure and reliable in recent years and the number of transactions is rising rapidly, parallelism can help us to reduce response time and increase throughput for e-commerce transactions. This paper will investigate parallelism in on-line transaction processing. It aims to specify those aspects of e-commerce transactions that would profit from parallel processing and analyze current parallel processing techniques to determine those which can be used for e-commerce transactions. The parallel processing techniques proposed in this paper can be easily applied to B2C and B2B on-line transaction processing. Although some parallel implementations of databases have been proposed, to the best of our knowledge, parallel implementations of on-line transaction processing specific to e-commerce are rarely existed

Molecular Detection of Mycoplasma synoviae from Backyard and Commercial Turkeys in Some Parts of Iran

M. synoviae (MS) is an economically important pathogen and the major cause of airsacculitis and infectious synovitis in turkeys. Infection with this pathogen may remain asymptomatic but can render infected birds susceptible to secondary infections. This study was carried out for the molecular detection of MS infection in commercial and backyard turkey flocks in Tehran, Semnan, Isfahan, Qazvin, Zanjan, East Azerbaijan, Gilan, Mazandaran, and Golestan provinces of Iran. Sixty-hundred tracheal, choanal cleft or/and infraorbital sinus samples were collected from 18 commercial and 31 backyard turkey flocks. The polymerase chain reaction (PCR) technique was performed by using primers specific for detecting the 16S rRNA and vlhA genes of MS. The results showed that 51.61% of backyard and 33.33% of commercial farms were MS-positive. These findings suggested the molecular presence of MS, especially in northern and central regions of Iran. Further, the frequency of MS-positive samples was significantly lower in commercial farms than backyard farms (

Compatibility of the entomopathogenic fungus Beauveria bassiana with the insecticides fipronil, pyriproxyfen and hexaflumuron

The compatibility of Beauveria bassiana isolate DEBI 002 (Atashgah) with fipronil, pyriproxyfenand hexaflumuron insecticides was assayed. To determine the impact of the insecticides on thegermination of the fungal spore, different concentrations of the compounds were added to the culturemedium (malt agar). In order to calculate the mycelial growth in different treatments, each colonydiameter was measured and the spores were counted in the surface area to assess its sporulation. Theresults showed that pyriproxyfen at 1500 ppm and hexaflumuron at 80 ppm completely inhibited mycelialgrowth, while the inhibitory effect of fipronil at 1600 ppm remained at 76.6%. The inhibitory effect oflower concentrations of all three insecticides was between 10 and 20%. All tested insecticides inhibitedthe spore production between 80 to 100% at the highest concentrations without any significantdifferences. Pyriproxyfen at 400 ppm and hexaflumuron at all concentrations completely inhibited sporegermination, with significant difference, comparing with the rest of treatments. The results indicate thathexaflumuron has the highest inhibitory effect on the spore germination and is not recommended to beused simultaneously with B. bassiana against the insect pests

The survival of patients with t(15;17)(q22;q12) positive acute promyelocytic leukemia: A study in north-east of iran

Background & Objective: Acute promyelocytic leukemia (APL) with t(15;17)(q22;q12) is a relatively common subtype of acute myeloid leukemia (AML). Here, our objective was to ascertain the survival of patients with this leukemia in north-east of Iran. Methods: Survival rates of 42 APL patients with t(15;17)(q22;q12) were assessed. Clinical information was obtained from archived medical records. Statistical analysis was performed by SPSS 18 software using log-ranked test and Kaplan Maier survival analysis. Results: Females and males comprised 49 and 51, respectively. The mean age at diagnosis was 34.3±14.1 years old. During the study period, 17 demises occurred in males, while this number was 7 in females. The mean survival of patients (month) was 23.22±3.57 (95 CI: 16.21±30.2). The five-year survival rate obtained 30. Regarding demographic and clinical features, the highest rates of 5-year survival were recorded in patients with 20-35 years old (47.6), males (51), white blood cell count <10� 109 /l (48), and platelet count >140� 109 /l (100). Conclusion: Younger age, lower WBC count and higher platelet count were significantly associated with longer survival in AML patients with t(15;17)(q22; q12). © Iranian Society of Pathology. All rights reserved