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A CFD study on the hydrodynamic response of a small-scale ice floe induced by a passing ship

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Journal of Hydrodynamics 2024年第2期36卷 290-299页

作者： Zongyu Jiang Spyros Hirdaris Sasan tavakoli Mikko Suominen Pentti Kujala Marine and Arctic Technology Department of Mechanical EngineeringAalto UniversityEspooFinland Global Ship Systems Centre ABS Hellenic SM LLC.AthensGreece Department of Infrastructure Engineering The University of MelbourneMelbourneAustralia

A Reynolds averaged Navier-Stokes(RANS)computational fluid dynamics(CFD)model is built to investigate the hydrodynamic response of a circular ice floe under the influence of a passing ship in calm *** ship,mirroring the KRISO Container Ship’s hull design,progresses near an ice floe whose diameter is 30%of the ship’s length and its thickness is 3 *** ship advances at a constant speed,which is handled by using the overset mesh *** study focuses on the ice floe’s motions and the hydrodynamic forces induced by three speeds and three transverse distances of the passing *** reveal that ship-generated wakes notably influence the ice floe’s motions,with a greater influence on sway than ***,the ship’s speed and proximity distinctly affect the ice floe’s motions.

关键词： Hydrodynamics ship-ice interactions ice floe Reynolds averaged Navier-Stokes(RANS)computational fluid dynamics(CFD)

Thin-film flow technology in controlling the organization of materials and their properties Special Collection:Distinguished Australian Researchers

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Aggregate 2024年第1期5卷 115-129页

作者： Clarence Chuah Xuan Luo Javad tavakoli Youhong Tang Colin L.Raston Flinders Institute for Nanoscale Science and Technology College of Science and EngineeringFlinders UniversityAdelaideSouth AustraliaAustralia Centre for Health Technologies School of Biomedical EngineeringFaculty of Engineering and Information TechnologyUniversity of Technology SydneySydneyNew South WalesAustralia

Centrifugal and shear forces are produced when solids or liquids *** systems and devices that use these forces,such as dynamic thin-film flow technology,are evolving continuously,improve material structure-property relationships at the nanoscale,representing a rapidly thriving and expanding field of research high with green chemistry metrics,consolidated at the inception of *** vortex fluidic device(VFD)provides many advantages over conventional batch processing,with fluidic waves causing high shear and producing large surface areas for micro-mixing as well as rapid mass and heat transfer,enabling reactions beyond diffusion *** these abilities allows for a green and innovative approach to altering materials for various research and industry applications by controlling small-scale flows and regulating molecular and macromolecular chemical reactivity,self-organization phenomena,and the synthesis of novel *** review highlights the aptitude of the VFD as clean technology,with an increase in efficiency for a diversity of top-down,bottom-up,and novel material transformations which benefit from effective vortex-based processing to control material structure-property relationships.

关键词： material nanoscale structure-property relationship thin film flow technology vortex fluidic device

Nurses'critical thinking disposition and professional commitment:a cross-sectional study

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Frontiers of Nursing 2024年第1期11卷 119-126页

作者： Mahtab Allah tavakoli Golnaz Foroughameri Jamileh Farokhzadian Sedigheh Khodabandeh Shahraki Nursing Research Center Kerman University of Medical SciencesKerman ***Iran Reproductive Health Family and Population Research CenterKerman University of Medical SciencesKerman ***Iran

Objective:High-quality and successful nursing care delivery in a variety of situations requires critical thinking training and professional *** present study aimed to investigate critical thinking disposition,professional commitment,and the relationship between these 2 variables among ***:As a result of stratified random sampling,201 nurses were enrolled in the present cross-sectional *** were gathered using a socio-demographic form,the Critical Thinking Disposition Inventory(CTDI),and the Nurses'Professional Commitment Scale(NPCS).Results:Although the critical thinking disposition scores were at a moderate level(115.70±13.55),the mean score for professional commitment was high(91.37±11.77).A positive correlation was found between critical thinking disposition and professional commitment(r=0.67,P=0.001).Conclusions:Nursing managers are urged to employ strategies to enhance nurses'critical thinking disposition and professional commitment.

关键词： critical thinking nursing education professional commitment skills strategies

Isoimperatorin alleviates acetic acid-induced colitis in rats

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Asian Pacific Journal of Tropical Biomedicine 2024年第4期14卷 147-153页

作者： Saied Goodarzi Amir Hossein Abdolghaffari Behnaz Najafi Mostafa Pirali Hamedani Saeed tavakoli Mahshad Marvi Maryam Baeeri Narguess Yassa Abbas Hadjiakhoondi Mohammad Abdollahi Zahra Tofighi Medicinal Plants Research Center Faculty of PharmacyTehran University of Medical SciencesTehranIran Department of Toxicology and Pharmacology Faculty of PharmacyTehran Medical SciencesIslamic Azad UniversityTehranIran Department of Pharmacognosy Faculty of PharmacyTehran University of Medical SciencesTehranIran Medicinal Plants Research Center Institute of Medicinal PlantsACECRKarajIran International Campus School of Pharmacy Tehran University of Medical SciencesTehranIran Toxicology and Diseases group The Pharmaceutical Sciences Research CenterTehran University of Medical SciencesTehranIran Department of Toxicology and Pharmacology Faculty of PharmacyTehran University of Medical SciencesTehranIran

Objective:To investigate the effect of isoimperatorin on histopathological and biochemical changes in acetic acid-induced colitis ***:Colitis was induced by intracolonic administration of acetic acid solution(4%v/v)in *** were divided into six groups including the sham group,the negative control group,the dexamethasone-treated group,and the groups treated with isoimperatorin(0.1,1,and 10 mg/kg/d by gavage).The treatments were administered for three days and then colonic status was assessed by macroscopic,histopathological,and biochemical ***:Isoimperatorin significantly alleviated colonic damage in a dose-dependent manner and improved histological changes in rats with acetic acid-induced *** also significantly reduced myeloperoxidase,TNF-α,IL-1β,and malodialdehyde ***:Isoimperatorin alleviates acetic acid-induced colitis in rats and may be a potential therapeutic agent for the treatment of colitis.

关键词： Isoimperatorin Inflammatory bowel disease Acetic acid Colitis TNF-α IL-1β

Theoretical Investigation of Adsorption Effects of Granisetron Anticancer Drug over BN(7,7-7) Nanotube as a Factor of Drug Delivery: a DFT Study

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Chinese Journal of Structural Chemistry 2019年第9期38卷 1421-1431页

作者： ZIBA tavakoli Department of Chemistry Genaveh Branch Islamic Azad University Department of Chemistry Gachsaran Branch Islamic Azad University

In the present work, the interaction between drug Granisetron(GRS) and BN(7,7-7) nanotube by density functional theory(DFT) calculations in the solvent water has been investigated. The non-bonded interaction effects of the molecule GRS with BN(7,7-7) nanotube on chemical shift tensors, natural charge and electronic properties such as the energy gap between HOMO and LUMO, global hardness, electronegativity and electronic chemical potential have been also detected. The natural bond orbital(NBO) analysis suggested that charge transfer depended between GRS and nanotube and induces a dipole moment in the complex. Then, the possibility of the use of BN(7,7-7) nanotube for GRS delivery to the diseased cells has been established.

关键词： granisetron BN(7,7-7) nanotube DFT adsorption NBO

Ocean Chemistry Revealed by Mineralogical and Geochemical Evidence at the Permian——Triassic Mass Extinction,Offshore the Persian Gulf,Iran

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Acta Geologica Sinica(English Edition) 2016年第5期90卷 1852-1864页

作者： Vahid tavakoli School of Geology College of ScienceUniversity of Tehran

The Upper Permian Dalan Formation and the Lower Triassic Kangan Formation in the Persian Gulf area are mainly composed of shallow marine facies limestone and *** subsurface-cored intervals were investigated in order to understand the original mineralogy and paleoceanic *** decreasing trend of Sr concentration in these deposits shows that aragonite was precipitated during the Late Permian and then gradually changed to calcite toward the Permian-Triassic boundary（PTB）.The dissolution rate of aragonite decreased from 60 m below the PTB toward the boundary,with the only exception at 10 m below the Permian-Triassic Boundary（PTB） due to the Permian-Triassic unconformity in this *** increasing trend of Mg/Ca ratio in a global scale at the end-Permian time shows that the interpreted variation of mineralogy does not result from the change of this *** increasing p（CO2） and decreasing pH are considered to be the main controlling *** increase of Ca2＋ at the end-Permian time due to the input of meteoric waters is too little to fully compensate this effect.A local maximum of the Si content just at the PTB confirms the input of runoff waters.

关键词： Permian Triassic carbonate mineralogy elemental composition Iran Persian Gulf

Neuroprotective potential of traditional Ayurvedic Kadha:age-related neurological disorders:a comprehensive literature review

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Traditional Medicine Research 2024年第9期9卷 51-77页

作者： Sarvin Sadreddini Mohammad Javad Emami Kazemabad Sogand Sheikholeslami Kosar Chitzan-Zadeh Mohammad Taha Kouchaki Midia Rashidi Amir Abbas Ghayerin Shahin Sabaghi Ghazal tavakoli Sepehr Nanbakhsh Tina Mansourian Arefeh Tabashiri Fariba Arbab Mojeni Mohammed Namiq Amin Zahra Taheri Seyed Esmaeil Sedighi Taraneh Tarkashvand Parham Amirazodi Mobina Fathi Shirin Yaghoobpoor Niloofar Deravi School of Medicine Tabriz University of Medical SciencesTabriz ***Iran School of Medicine Qom University of Medical SciencesQom ***Iran School of Medicine Hamadan University of Medical SciencesHamadan ***Iran School of Medicine Ahvaz Jundishapur University of Medical SciencesAhvaz ***Iran Faculty of Medicine Tabriz University of Medical SciencesTabriz ***Iran School of Medicine Iran University of Medical SciencesTehran ***Iran School of Medicine Shahid Beheshti University of Medical SciencesTehran ***Iran School of Medicine Mazandaran University of Medical SciencesSari ***Iran School of Medicine Kermanshah University of Medical SciencesKermanshah ***Iran Faculty of Pharmacy Pharmaceutical Sciences BranchIslamic Azad UniversityTehran ***Iran Department of Biology Faculty of SciencePayamNoor UniversityTehran ***Iran Faculty of Medicine Islamic Azad University of Medical ScienceTehran 193951495Iran International Campus Shahid Sadoughi University of Medical SciencesYazd ***Iran

Despite modern medicine’s advancements,age-related neurological diseases like Alzheimer’s disease and Parkinson’s disease remain challenging due to high costs,side effects,and limited ***,a traditional Indian medicine system,offers Kadha tea as a potential herbal *** review explores Kadha’s components(basil(Ocimum basilicum L.),black pepper(Piper nigrum L.),Cinnamon(Cinnamomum verum ***),ginger(Zingiber officinale Roscoe),and raisin(Vitis vinifera L.))and their interaction with various neurological *** suggest Kadha exhibits anti-inflammatory,antioxidant,and antiviral properties,potentially impacting Alzheimer’s disease,Parkinson’s disease,neurotoxicity,neuroinflammation,and brain *** focusing on specific disease mechanisms and Kadha’s intergrade effects,this review aims to elucidate its potential role in managing age-related neurological disorders.

关键词： Ayurveda Kadha neuroprotective neurological disorders traditional medicine

Human reliability analysis in maintenance team of power transmission system protection

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Protection and Control of Modern Power Systems 2020年第1期5卷 290-302页

作者： Mehdi tavakoli Mehdi Nafar Department of Electrical Engineering Marvdasht BranchIslamic Azad UniversityMarvdashtIran

The requirement for reliable electrical energy supply increases continuously because of its vital role in our ***,events due to various factors in the power grid can cause energy supply to be *** of these factors is human error and thus human reliability analysis is a serious element in the *** first step is to identify the roots of human error,on which there has been limited research in this *** this paper,the potential and actual causes of human error in maintenance teams of power transmission system protection are identified and predicted within a framework of human factors analysis and classification system ***,human error factors are ranked to help improve human *** proposed method is implemented in the Fars Electricity Maintenance Company.

关键词： Power transmission system protection Maintenance teams Human reliability HFACS method

Suppression of high order disturbances and tracking for nonchaotic systems:a time-delayed state feedback approach

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Control Theory and Technology 2022年第1期20卷 54-68页

作者： Zahed Dastan Mahsan tavakoli-Kakhki Faculty of Electrical Engineering K.N.Toosi University of TechnologyTehranIran

Time-delayed state feedback is an easy realizable control method that generates control force by differencing the current and the delayed versions of the system *** this paper,a new form of the time-delayed state feedback structure is *** on the proposed time-delayed state feedback method,a new robust tracking system is *** tracking system improves the conventional state feedback with integral action disturbance rejection characteristics in the presence of the disturbance signals imposed on the system dynamics or on the sensors that measure the system ***,the proposed tracking system tracks the ramp-shaped reference input signal,which is not achievable through conventional state ***,since the proposed method adds delays to the closed-loop system dynamics,the ordinary differential equation of the system changes to a delay differential equation with an infinite number of characteristic ***,conventional pole placement techniques cannot be used to design the time-delayed state feedback controller *** this paper,the simulated annealing algorithm is used to determine the proposed control system parameters and move the unstable roots of the delay differential equation to the left ***,the efficiency of the proposed reference input tracker is demonstrated by presenting two numerical examples.

关键词： Time-delayed state feedback Integral control Disturbance rejection Robust tracking