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Studying the Equilibrium Points of the Modified Circular Restricted three-body Problem: the Case of Sun–Haumea System

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Research in Astronomy and Astrophysics 2023年第11期23卷 232-242页

作者： INurul Huda b.Dermawan M.b.Saputra R.Sadikin t.Hidayat Research Center for Computing National Research and Innovation AgencyBogorIndonesia Department of Astronomy and bosscha observatory FMIPAInstitut Teknologi BandungBandungIndonesia

We intend to study a modified version of the planar Circular Restricted three-body Problem(CRtbP) by incorporating several perturbing parameters. We consider the bigger primary as an oblate spheroid and emitting radiation while the small primary has an elongated body. We also consider the perturbation from a disk-like structure encompassing this three-body system. First, we develop a mathematical model of this modified *** have found there exist five equilibrium points in this modified CRtbP model, where three of them are collinear and the other two are non-collinear. Second, we apply our modified CRtbP model to the Sun–Haumea system by considering several values of each perturbing parameter. through our numerical investigation, we have discovered that the incorporation of perturbing parameters has resulted in a shift in the equilibrium point positions of the Sun–Haumea system compared to their positions in the classical CRtbP. the stability of equilibrium points is investigated. We have shown that the collinear equilibrium points are unstable and the stability of non-collinear equilibrium points depends on the mass parameter μ of the system. Unlike the classical case, non-collinear equilibrium points have both a maximum and minimum limit of μ for achieving stability. We remark that the stability range of μ in non-collinear equilibrium points depends on the perturbing parameters. In the context of the Sun–Haumea system, we have found that the non-collinear equilibrium points are stable.

关键词： celestial mechanics Kuiper belt:general planets and satellites:dynamical evolution and stability

Nanostructured steels for advanced structural applications

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Materials Futures 2022年第1期1卷 97-100页

作者： H J Kong t Yang t L Zhang b X Cao C t Liu Department of Mechanical Engineering Department of Material Science and EngineeringHong Kong Institute for Advanced StudyCity University of Hong KongHong KongPeople’s Republic of China

this vision summarizes the recent advancement of nanostructured steels foradvanced structural applications, foresees possible challenges and pinpoints futuredirections as well as opportunities in this new era of indus... 详细信息

关键词： nanostructured steels extreme environments advanced manufacturing shape memory

Effect of high-intensity interval training in adolescents with asthma:the eXercise for Asthma with Commando Joe’s^(■)(X4ACJ)trial

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Journal of Sport and Health Science 2021年第4期10卷 488-498页

作者： Charles o.N.Winn Kelly A.Mackintosh William t.b.Eddolls Gareth Stratton Andrew M.Wilson Melitta A.McNarry Gwyneth A.Davies Swansea University Medical School Singleton CampusSwansea UniversitySwansea SA28PPUK Applied Sports technology Exercise and Medicine(A-STEM)Research CentreCollege of EngineeringBay CampusSwansea UniversitySwansea SA18ENUK Norwich Medical School University of East AngliaNorwichEngland NR47TJUK

background:Higher levels of cardiorespiratory fitness are associated with reduced asthma severity and increased quality of life in those with ***,the purpose of this study was to evaluate the effectiveness of a 6-month high-intensity interval training(HIIt)intervention in adolescents with and without ***:A total of 616 adolescents(334 boys;13.0±1.1 years,1.57±0.10 m,52.6±12.9 kg,mean±SD),including 155 with asthma(78 boys),were recruited as part of a randomized controlled trial from 5 schools(4 control and 1 intervention).the 221 intervention participants(116 boys;47 asthma)completed 6 months of school-based HIIt(30 min,3 times per week,10-30 s bouts at>90%age-predicted maximum heart rate with equal rest).At baseline,mid-intervention,post-intervention,and 3-month follow-up,measurements for 20-m shuttle run,body mass index(bMI),lung function,Pediatric Quality of Life Inventory,Paediatric Asthma Quality of Life Questionnaire,and Asthma Control Questionnaire were ***,69 adolescents(39 boys(of the 36 with asthma there were 21 boys))also completed an incremental ramp *** analysis,each group’s data(intervention and control)were divided into those with and without ***:Participants with asthma did not differ from their peers in any parameter of aerobic fitness,at any time-point,but were characterized by a greater *** intervention elicited a significant improvement in maximal aerobic fitness but no change in sub-maximal parameters of aerobic fitness,lung function,or quality of life irrespective of asthma *** in the intervention group maintained their bMI,whereas bMI significantly increased in the control group throughout the 6-month ***:HIIt represents an effective tool for improving aerobic fitness and maintaining bMI in adolescents,irrespective of asthma *** was well-tolerated by those with asthma,who evidenced a similar aerobic fitness to their healthy peers and responded equally

关键词： body mass index Cardiorespiratory fitness Intermittent exercise Intervention Quality of life

Impact of La^(3+)substitution on electrical,magnetic,dielectric and optical properties of Ni_(0.7)Cu_(0.1)Zn_(0.2)LaxFe_(2-x)o_(4)(0tem

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Journal of Rare Earths 2023年第5期41卷 740-746,I0004页

作者： b.b.Patil A.D.Pawar S.S.barate J.S.Ghodake J.b.thorat t.J.Shinde P.G.Department of Physics Smt.KRP Kanya MahavidyalayaIslampurMS415409India Department of Physics Shivaji UniversityKolhapurMS416004India Departments of Physics PDVP MahavidyalayaMahavidyalayaTasgaonMS416312India Department of Physics Sadguru Gadage Maharaj CollegeKaradMS415110

the oxalate co-precipitation method was used to synthesize the La3+substituted Ni-Cu-Zn(La-NCZ)nanoferrites having chemical composition Ni_(0.7)Cu_(0.1)Zn_(0.2)LaxFe_(2-x)o_(4)(x=0.015,0.025 and 0.035).DC resistivity study of nanoferrites shows both the conducting and semiconducting *** room temperature DC electrical resistivity of Ni-Cu-Zn(NCZ)nanoferrites decreases,whereas Curie temperature increases with increasing La^(3+)*** the temperature range of 30-170℃nanoferrites show p-type semiconducting behavior except x=0.015;thereafter,they show n-type *** frequency dispersive initial permeability(μi)associated with its real and imaginary(μ’andμ")parts are attributed to the domain wall movement and magnetic spin ***μi,u’andμ"of La-NCZ nanoferrites are higher than those of pure NCZ *** constant(ε’),dielectric loss(ε")and AC resistivity(ρAC)of La-NCZ nanoferrites show normal dielectric *** is found thatε’of NCZ nanoferrites decreases with the increasing content of La3+*** bandgap energy of La-NCZ nanoferrites is achieved in the range 1.36-1.70 eV confirming the semiconducting nature of materials.

关键词： Ni-Cu-La-Zn nanoferrites DC electrical Resistivity Permeability Dielectric properties bandgap energy Rare earths

Combined effects of rotation and thermal radiation on peristaltic transport of Jeffrey fluid

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International Journal of biomathematics 2015年第5期8卷 159-179页

作者： t. Hayat Maimona Rafiq b. Ahmad Department of Mathematics Quaid-i-Azam University 45320 Islamabad44000 Pakistan Nonlinear Analysis and Applied Mathematics (NAAM) Research Group Department of Mathematics King Abdulaziz University Jeddah 21589 Saudi Arabia

the objective of this communication is to examine the effect of rotation on the peristaltic motion of non-Newtonian fluid. Constitutive relationship of Jeffrey fluid is employed in the mathematical formulation and related analysis. the thermal radiation and Joule heating effects are also considered. An electrically conducting fluid in a channel with compliant boundaries is taken. Solution expressions are established through assumptions of large wavelength and low Reynolds number. Impact of taylor and Hartman numbers on the axial velocity is similar in a qualitative sense. there is reverse effect of taylor number on the secondary velocity when compared with the axial velocity. temperature and heat transfer coefficients are increasing functions of taylor number.

关键词： Rotating frame thermal radiation Joule heating Jeffrey fluid.

Analytical modeling and simulation of germanium single gate silicon on insulator tFEt

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Journal of Semiconductors 2014年第3期35卷 25-28页

作者： t.S.Arun Samuel N.b.balamurugan Department of Electronics and Communication Engineering Thiagarajar College of Engineering

this paper proposes a new two dimensional（2D） analytical model for a germanium（Ge） single gate silicon-on-insulator tunnel field effect transistor（SG SoI tFEt）. the parabolic approximation technique is used to solve the 2D Poisson equation with suitable boundary conditions and analytical expressions are derived for the surfacepotential,*** is derived further by using the electric fields. the results show that Ge based tFEts have significant improvements ***heanalytical model results with the technology computer aided design（tCAD） simulation results and also comparing them with results from a silicon based tFEt.

关键词： tunnel field effect transistor(tFEt) analytical modelling Poisson equation surface potential electric field

Androgens exert sexually dimorphic effects on angiogenesis： novel insight into the relationship between androgens and cardiovascular disease

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Asian Journal of Andrology 2011年第4期13卷 626-627页

作者： Katya b Rubinow John K Amory Stephanie t Page Division of Metabolism Endocrinology and Nutrition University of Washington Seattle WA 98195 USA General internal Med c ne Un versity of Washington Seattle WA 98195 USA

the effects of androgen exposure on cardiovascular disease （CVD） risk in men remain poorly understood. Given the earlier incidence of CVD among men relative to women, androgens historically have been assumed to pote... 详细信息

关键词： Androgens sexually

Magnetocaloric effects in Fe_4MnSi_3b_x interstitial compounds

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Acta Metallurgica Sinica(English Letters) 2009年第5期22卷 397-400页

作者： Yongli WU o. tegus Weiguang ZHANG S. Yiriyoltu b. Mend Songlin Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials Inner Mongolia Normal University Huhhot 010022 China Van der Waals-Zeeman Instituut Universiteit van Amsterdam Valckenierstraat 65 1018 XE Amsterdam The Netherlands

the magnetic properties and magnetocaloric effect in Fe4MnSi3b~ compounds with x=0, 0.05, 0.10, 0.15, 0.20, 0.25 have been investigated. X-ray diffraction study shows that all these compounds investigated crystallize in the MnsSi3-type structure with space group P63/mcm. boron insertion in the host ternary silicide Fe4MnSi3 does not change the crystal symmetry, only leads to an increase of the lattice parameters, indicating the b atoms entered the interstitial sites. With increasing b content, the Curie temperature shifts to higher temperatures. the maximal magnetic-entropy changes of the Fe4MnSi3bx compounds with x=0, 0.10 and 0.20 are about 1.8 J/（kg.K）, 1.8 J/（kg-K） and 1.6 J/（kg.K）, respectively, for a field change from 0 to 1.5 t.

关键词： transition metal interstitial compounds Magaetocatoric effect Magnetic properties

Automated Chinese medicinal plants classification based on machine learning using leaf morpho-colorimetry,fractal dimension and visible/near infrared spectroscopy

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International Journal of Agricultural and biological Engineering 2019年第2期12卷 123-131页

作者： Jinru Xue Sigfredo Fuentes Carlos Poblete-Echeverria Claudia Gonzalez Viejo eden tongson Hejuan Du baofeng Su College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina School of Agriculture and Food.Faculty of Veterinary and Agricultural Sciences the University of Melbourne3010 Australia Faculty of AgriSciences Stellenbosch UniversityStellenbosch 7602South Africa Key Laboratory of Agricultural Internet of things Ministry of Agriculture and Rural AffairsYangling 712100ShaanxiChina Key Laboratory of Agricultural Perception and Intelligent Services Shaanxi ProvinceYangling 712100ShaanxiChina College of Information Engineering Tibet Nationality UniversityXianyang 712089ShaanxiChina

the identification of Chinese medicinal plants was conducted to rely on ampelographic manual assessment by *** recently,machine learning algorithms for pattern recognition have been successfully applied to leaf recognition in other plant *** new tools make the classification of Chinese medicinal plants easier,more efficient and cost *** study showed comparative results between machine learning models obtained from two methods:i)a morpho-colorimetric method and ii)a visible(VIS)/Near Infrared(NIR)spectral analysis from sampled leaves of 20 different Chinese medicinal ***,the automated image analysis and VIS/NIR spectral based parameters obtained from leaves were used separately as inputs to construct customized artificial neural network(ANN)*** showed that the ANN model developed using the morpho-colorimetric parameters as inputs(Model A)had an accuracy of 98.3%in the classification of leaves for the 20 medicinal plants *** the case of the model based on spectral data from leaves(Model b),the ANN model obtained using the averaged VIS/NIR spectra per leaf as inputs showed 92.5%accuracy for the classification of all medicinal plants *** A has the advantage of being cost effective,requiring only a normal document scanner as measuring *** method can be adapted for non-destructive assessment of leaves in-situ by using portable wireless *** b combines the fast,non-destructive advantages of VIS/NIR spectroscopy,which can be used for rapid and non-invasive identification of Chinese medicinal plants and other applications by analyzing specific light spectra overtones from leaves to assess concentration of pigments such as chlorophyll,anthocyanins and others that are related active compounds from the medicinal plants.

关键词： ampelography computer vision artificial neural networks pattern recognition Chinese medicinal plants