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Fluid Dynamics & Materials Processing 2022年第5期18卷 1243-1251页

作者： larbi afif Nahla Bouaziz Research Lab Energetic and Environment National Engineering School of TunisTunis El Manar UniversityBelvedereTunis1002Tunisia

In the present work,a novel Organic Rankine Cycle(ORC)configuration is used for a low-grade heat source cogeneration *** investigation is conducted accordingly into the simultaneous production of electricity and *** proposed configuration relies on concentrated solar power(as heat source)and ambient air(for cooling).Furthermore,two gas ejectors are added to the system in order to optimize the thermodynamic efficiency of the organic Rankine *** results show that the thermodynamic and geometric parameters related to these ejectors have an important effect on the overall system *** order to account for the related environmental impact,the following working fluids are considered:HCFC-124,HFC-236fa,HFO-1234yf and *** shown by the numerical simulations,the fluid R1234yf presents the minimal heat consumption and therefore provides an optimal thermal efficiency for the ORC cycle(which is around 29%).However,the refrigerant R236fa displays the highest refrigeration performances with a performance coefficient reaching a value as high as 0.38.

关键词： ORC energy efficiency solar energy ejector

Remission of type 2 diabetes mellitus

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World Journal of Diabetes 2024年第7期15卷 1384-1389页

作者： afif Nakhleh Elya Halfin Naim Shehadeh Institute of Endocrinology Diabetes and MetabolismRambam Health Care CampusHaifa 3109601Israel Diabetes and Endocrinology Clinic Maccabi Healthcare ServicesHaifa 3299001Israel The Azrieli Faculty of Medicine Bar-Ilan UniversitySafed 1311502Israel

The surge in type 2 diabetes mellitus(T2DM)is tightly linked to obesity,leading to ectopic fat accumulation in internal *** management has become a cornerstone of T2DM treatment,with evidence suggesting that significant weight loss can induce ***,defined as sustained hemoglobin(HbA1c)below 6.5% for at least 3 months without medication,can be achieved through various approaches,including lifestyle,medical,and surgical *** bariatric surgery offers significant remission rates,particularly for patients with severe *** lifestyle modifications,including lowcalorie diets and exercise,have also demonstrated significant *** like incretin-based agents show robust results in improving beta-cell function,achieving glycemic control,and promoting weight *** complete remission without medication may not be attainable for everyone,especially those with severe insulin resistance or deficiency,early and aggressive glycemic control remains a crucial *** HbA1c below 6.5%from the time of diagnosis reduces the risk of long-term complications and ***,considering a broader definition of remission,encompassing individuals with sustained control on medication,could offer a more comprehensive and inclusive approach to managing this chronic disease.

关键词： Type 2 diabetes mellitus Remission Lifestyle intervention Metabolic bariatric surgery Glucose-lowering medications Weight management medications

Systemic oncological therapy in breast cancer patients on dialysis

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World Journal of Clinical Oncology 2024年第6期15卷 730-744页

作者： Salman Khan Ghada Araji Ekrem Yetiskul Praneeth Reddy Keesari Fadi Haddadin Zaid Khamis Varun Chowdhry Muhammad Niazi Sarah afif Meekoo Dhar Suzanne El-Sayegh Department of Internal Medicine Northwell Health-Staten Island University HospitalStaten IslandNY 10305United States Department of Hematology and Oncology Northwell Health-Staten Island University HospitalStaten IslandNY 10305United States Department of Internal Medicine CUNY School of MedicineNew YorkNY 10031United States

The advancement of renal replacement therapy has significantly enhanced the survival rates of patients with end-stage renal disease(ESRD)over ***-ever,this prolonged survival has also been associated with a higher likelihood of cancer diagnoses among these patients including breast *** cancer treatment typically involves surgery,radiation,and systemic therapies,with ap-proaches tailored to cancer type,stage,and patient ***,renal replacement therapy complicates systemic therapy due to altered drug clearance and the necessity for dialysis *** review emphasizes the need for opti-mized dosing and administration strategies for systemic breast cancer treatments in dialysis patients,aiming to ensure both efficacy and ***,ch-allenges in breast cancer screening and diagnosis in this population,including soft-tissue calcifications,are highlighted.

关键词： Breast cancer Systemic therapy Renal replacement therapy Dialysis End-stage renal disease Hormone therapy Chemotherapy

Biochemical methane potential of three-phase olive mill solid waste:Influence of temperature and supplemental enzymes

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Carbon Resources Conversion 2022年第3期5卷 248-254页

作者： Rafat Al afif Christoph Pfeifer Institute of Chemical and Energy Engineering Department of Material Sciences and Process EngineeringUniversity of Natural Resources and Life SciencesViennaMuthgasse 1071190 ViennaAustria

Methane potential of three-phase olive mill solid waste(3POMSW)was evaluated by biochemical methane potential(BMP)tests at temperatures of 37.5◦C and 55◦*** results have shown,that thermophilic processing has a higher methane and biogas yield by 10%and 17.2%,respectively,compared to mesophilic *** thermophilic conditions of 3POMSW results in higher conversion of the feedstock into *** result of addition of enzymes(MethaPlus,Hemicellulase,PectinaseL,Amylase S and Lipase)and their mixtures to 3POMSW at 55◦C has shown that the optimum mixture of enzymes was Metha Plus and Hemicellulase,which resulted in an increase of methane yield by 1.3%compared to the base case without addition of *** model equations were developed based on first-order kinetic in order to calculate the biogas yield versus the time as a function of reaction rate constant(k)and the maximum biogas yield(ymax).In this study,results have shown two different reaction rates obtained for the mixtures of enzymes with 3POMSW of 0.130 d^(-1) from t=0…14 days and 0.034 d^(-1) from t=28…63 *** developed simple model equations can be applied for calculating the biogas yield at the time and by optimizing the process improving biological nutrient removal.

关键词： Three-phase olive mill solid waste Biochemical methane potential Mesophilic Thermophilic Anaerobic digestion

Thermal Analysis of Melting Occurring Inside a Finned Rectangular Enclosure Equipped with Discrete Pulsed Protruding Heat Sources

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1539-1549页

作者： Brahim Amahan Hamid El Qarnia Ali El afif Faculty of Sciences Department of PhysicsLaboratory of Innovation in Sciences Technology and ModelingChouaib Doukkali UniversityEl JadidaMorocco Faculty of Sciences Semlalia Fluid Mechanics and Energetic LaboratoryDepartment of PhysicsCadi Ayyad UniversityMarrakeshMorocco

This paper numerically investigates the effect of the location of a horizontal fin on the melting of a phase change material(PCM)inside a rectangular enclosure heated by multiple discrete pulsed protruding heat *** fin and the phase change material filling the enclosure store the thermal energy extracted from the heat sources,in sensible and latent *** heat sources are assumed to simulate electronic components undergoing a superheating technical *** extracting heat from the electronics,the PCM plays the role of a heat *** analyze the thermal behavior and predict the cooling performance of the proposed cooling system,we derive a nonlinear mathematical model based on mass,momentum and energy conservation *** numerical investigations are conducted to quantify the influence of the fin position on the thermal behavior and the cooling performance of the heat *** include the transient maximum temperature occurring inside the heat sources and the liquid volume.A comparison between our numerical results and experimental data selected from the literature shows a good *** main conclusion is that the presence of the fin leads to a slight increase in the melting time.

关键词： Phase change material melting heat transfer pulsed heating electronics cooling heat storage fin

THE LERAY-SCHAUDER CONDITION FOR 1-SET WEAKLY-CONTRACTIVE AND(ws)-COMPACT OPERATORS

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Acta Mathematica Scientia 2014年第2期34卷 263-273页

作者： afif BEN AMAR Department of Mathematics Faculty of Sciences

Abstract The main purpose of this article is to prove a collection of new nxea point theorems for （ws）-compact and so-called 1-set weakly contractive operators under Leray- Schauder boundary condition. We also introduce the concept of semi-closed operator at the origin and obtain a series of new fixed point theorems for such class of operators. As consequences, we get new fixed point existence for （ws）-compact （in particular nonexpansive） self mappings unbounded closed convex subset of Banach spaces. The main condition in our results is formulated in terms of axiomatic measures of weak noncompactness. Later on, we give an application to generalized Hammerstein type integral equations.

关键词： Measure of weak noncompactness weakly condensing and weakly nonexpan-sire (ws)-compact operator fixed point theorems semi-closed at the origin

A COMPOUND POISSON MODEL FOR LEARNING DISCRETE BAYESIAN NETWORKS

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Acta Mathematica Scientia 2013年第6期33卷 1767-1784页

作者： Abdelaziz GHRIBI afif MASMOUDI Laboratory of Physic-Mathematics University of Sfax Laboratory of Probability and Statistics University of Sfax

We introduce here the concept of Bayesian networks, in compound Poisson model, which provides a graphical modeling framework that encodes the joint probability distribution for a set of random variables within a directed acyclic graph. We suggest an approach proposal which offers a new mixed implicit estimator. We show that the implicit approach applied in compound Poisson model is very attractive for its ability to understand data and does not require any prior information. A comparative study between learned estimates given by implicit and by standard Bayesian approaches is established. Under some conditions and based on minimal squared error calculations, we show that the mixed implicit estimator is better than the standard Bayesian and the maximum likelihood estimators. We illustrate our approach by considering a simulation study in the context of mobile communication networks.

关键词： Bayesian network compound Poisson distribution multinomial distribution implicit approach mobile communication networks

Comparison of the Effectiveness of TRV Chair and Canalith Repositioning Procedure (CRP) for the Treatment of Benign Paroxysmal Positional Vertigo (BPPV)

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International Journal of Otolaryngology and Head & Neck Surgery 2022年第4期11卷 143-153页

作者： Abdul Kader afif Yamout The School of Advanced Education Research and Accreditation (SAERA) Castelló Spain

The primary goal of this research is to evaluate the efficacy of traditional manual canalith repositioning procedures (CRP) to that of automated multi-axial repositioning chair (TRV). A total of 37 BPPV positive patients were distributed into two groups. The first group consisted of 20 patients, 10 under 50 years old (young group) and 10 over 50 years old (old group), who received TRV chair treatment, whereas the remaining 17 patients, 7 under 50 years old (young group) and 10 over 50 years old (old group) received CRP treatment. The DHI and VAS questionnaires were given to the patients before and after treatment, and the results were compared. The average VAS score for TRV patients was 84.5% (young group) and 77.5% (old group). These patients’ DHI results were as follows: for young patients, 10% had a mild handicap, 80% had a moderate handicap, and 10% had a severe handicap, while for the elderly, 40% had a mild handicap, 40% had a moderate handicap, and 20% had a severe handicap. The results improved significantly after the first treatment session. Old patients had a VAS of 28%, 30% had a mild handicap and only 10% had a moderate handicap. However, only 43% of the young group and 30% of the old group who underwent standard CRP suffered from mild handicap and had a VAS of 20% and 34.3% successively. The third session revealed that all patients in the TRV chair group had no handicap, whereas the CRP patients indicated that they still had a mild handicap. Upon analyzing the results, both treatment methods revealed the same efficacy in treating single canal BPPV. However, TRV chair appeared to be superior to traditional CRP in treating multi-canal BPPV.

关键词： Manual Repositioning Procedure Vertigo DHI CRP BPPV VAS TRV Chair

Comprehensive chemical characterization of PM_(2.5) in the large East Mediterranean-Middle East city of Beirut,Lebanon

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Journal of Environmental Sciences 2023年第11期133卷 118-137页

作者： Nansi Fakhri Marc Fadel Fatma Ozturk Melek Keles Minas Iakovides Michael Pikridas Charbel Abdallah Cyril Karam Jean Sciare Patrick L.Hayes Charbel afif EMMA Research Group Centre d’Analyses et de RechercheFaculty of SciencesUniversitéSaint-JosephBeirutLebanon Department of Chemistry Faculty of SciencesUniversitéde MontréalMontréalQuébecCanada Environmental Engineering Department Faculty of EngineeringBolu Abant Izzet Baysal UniversityBoluTurkey Climate and Atmosphere Research Center(CARE-C) The Cyprus InstituteNicosiaCyprus

The chemical composition of PM_(2.5) at two sites in Lebanon,a country in the East Mediterranean-Middle East region,is investigated in the spring and summer *** average PM_(2.5) concentrations were of(29±16)μg/m 3 for Beirut urban site and(32±14)μg/m 3 for Beirut suburban *** study showed that the geographic location of the East Mediterranean region,such as its proximity to the Mediterranean Sea and the dust storm intrusion are a significant contributor to the high PM levels from natural sources,which cannot be mitigated,rendering the PM_(2.5) WHO annual Air Quality guideline unattainable due to high natural background,which also applies to the entire Middle East *** and Eastern Europe are the dominant origin of air masses throughout our sampling days,suggesting the long-range transport as an important potential contributor to the high observed concentrations of V,Ni,and sulfate in this region most probably in other East Mediterranean countries than Lebanon *** local sources determined through the chemical speciation including organics are road transport,resuspension of dust and diesel private generators.A health risk assessment of airborne metals was performed and the carcinogenic risk for all the metals exceeded by 42(adults)and 14(children)times the acceptable risk level(10^(-6))at both *** was the predominant carcinogenic metal,emphasizing the need to replace energy production with cleaner energy on a regional level and highlighting the severe impact of air pollution on the health of inhabitants in this region’s main cities.

关键词： Chemical composition PM_(2.5) Eastern Mediterranean Middle East Organic aerosols Health risk assessment

Monte Carlo Simulations of Mixed Highly Frustrated Systems

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Chinese Physics Letters 2002年第8期19卷 1187-1190页

作者： K.afif M.Hamedoun 等 LaboratoiredeMagnetisme FacultedesSciencesBP1014RabatMorocco LaboratoiredePhysiquedessolides FacultedesSciencesDharMahrazFesMorocco

We have performed Monte Carlo simulations on the mixed highly frustrated K2CuxMn1-xF4 and FexMn1-xTiO3 systems. Transitions of random systems with well-established universality classes are obtained. This study allows us to investigate mainly the usual and re-entrant spin glass and criticality associated with these states. The ratio x of substitution (or dilution) is found to have a large influence on the nature of this criticality.

关键词： Monte Carlo methods