#mathematicalmodelling

[physicsalertofficial]

Bayreuth mathematicians use AI to study galaxies What do galaxies look like? How do they behave in the long term? These are some of the questions that Dr. Sebastian Wolfschmidt and Christopher Straub, researchers at the University of Bayreuth, are trying to answer. They use mathematical models of galaxies that incorporate Einstein’s general theory of relativity, which explains how gravity affects space and time. However, these models are not easy to test, as astronomical observations are limited and numerical simulations are time-consuming. That’s why Wolfschmidt and Straub have developed a novel approach that uses artificial intelligence (AI) to quickly predict the stability of galaxy models. A deep […]

[jobrxiv]

Postdoctoral Fellow in Microbial Genetics or Genomics, UTHealth Houston University of Texas Health Science Center at Houston Join us in our multidisciplinary research #genetics, #genomics, #molbio, #evolution, #systems, #bigdata, & #mathematicalmodeling See the full job description on jobRxiv: https://jobrxiv.org/job/university-of-texas-health-science-center-at-houston-27778-postdoctoral-fellow-in-microbial-genetics-or-genomics-uthealth-houston/?feed_id=81231 #antibiotics #antimicrobial_resistance #bacterial_behavior #genetics #genomics #microbiology #sequencing #transposon #ScienceJobs #hiring #research

[urgent-homework-help]

Are you struggling to complete your Matlab assignments for your mathematical modelling course? Our team of experienced tutors can provide the support you need to succeed. From basic concepts to advanced techniques, we have the expertise to help you tackle any assignment. Contact us today for personalized Matlab homework assistance.

[prapatti01]

Mathematical Modeling: Definition, Classifications - Turito

[binomialpascal]

Steven Strogatz is great at communicating how cool and useful math and mathematical thinking can be.

[acadma]

Fossilized coral at 10x and 20x with the #Samsung #Note9 and the @moment 10x #marco lens. I wonder what mathematical model describes this growth patten? I'd like to recreate it digitally and use it to create 3D printed structures. #fossil #fossilizedcoral #fossilized #coral #stone #mathematics #mathematicalmodeling #growthpatten @samsungmobile #momentmacro #photography #macrophotography #cellphonephotography #photo (at Williamsburg, Virginia) https://www.instagram.com/p/B6yprbXHHBU/?igshid=7ce7wsxadnjq

[mycoblonde]

The likelihood supplies a natural order of preferences among all the possibilities under consideration

RA Fisher, 1956. 

I’ve never seen a better summary of what maximum likelihood (ML) models do. I tend to lean towards ML analyses as opposed to Bayesian methods, but that’s just me.

[study-helps-blog]

Clarify any doubts immediately. Math is not a subject to wait until the end of the class to clear out queries. . . . . . . #Math #matheuscanto #mathieuvandenbergh #Mathwedding #mathewjsmithphotography #MathildeofBelgium #mathisliamjourney #mathieumerletbriand #MathAwarenessMonth #mathematicalmodel #mathesonhammock #mathmagician #matheuscarvalho #mathomework #mathesonhammockpark #mathsgame #mathieudussaucy #MathewsNoCam #mathstutor #mathieumilesphotography #mathematicequation #mathcenters #mathart #mathmammoth #mathewmodine #mathsbaba #mathdegree #MathieuValbuena #mathieuvilleneuve #mathaji https://www.instagram.com/p/BuI2LJpgN7s/?utm_source=ig_tumblr_share&igshid=v04j0m7fk9pk

[bilingualpublishing]

Discussion at Maximum Sediment Discharge Theory

DOI:  https://doi.org/10.30564/jgr.v3i1.1572 Abstract It is observed the gravel river sediment discharge with existing empiricalregime relationships. The aim of the research is to give a mathematicalmodel about the stable cross-section geometry and to determine a modelfor the stable slope of an alluvial channel which is in nature seldom stable.In an alluvial channel to reach an equilibrium…

[helpwithperdisco]

Want To Score Dream Grades In Academics? Grab It Now By Seeking Mathematical Modeling Assignment Help And Online Tutor Service This Hour is Offered At the Most Affordable Price! Order Now on WhatsApp: +1-415-670-9521!! #MathematicalModeling #AssignmentHelp #AssessmentWritingService #OnlineTutorService #DownloadSolutions #OnlineTutor #AskTutor #AssignmentWriting #HomeworkHelp

[djangodeveloper]

Python for finance: Obtaining Stock Prices ☞ https://medium.com/mathematicalmodelling/python-for-finance-obtaining-stock-prices-15c4dcd08445 #python #programming

[jobrxiv]

Postdoctoral Fellow in Microbial Genetics or Genomics, UTHealth Houston University of Texas Health Science Center at Houston Join us in our multidisciplinary research #genetics, #genomics, #molbio, #evolution, #systems, #bigdata, & #mathematicalmodeling See the full job description on jobRxiv: https://jobrxiv.org/job/university-of-texas-health-science-center-at-houston-27778-postdoctoral-fellow-in-microbial-genetics-or-genomics-uthealth-houston/?feed_id=81042 #antibiotics #antimicrobial_resistance #bacterial_behavior #genetics #genomics #microbiology #sequencing #transposon #ScienceJobs #hiring #research

[babyawacs]

.@phys .@physics .@sciam @science @sciam .@science @sciam @nature @naturephysics @energy .@energy  https://physicswo rld.com/a/proton-contains-more-anti-down-quarks-than-anti-up/ this means nothing  ito nly means  that hadrons disintegrate  in a certainway w ith bigger energy and then the smallerbrackets with less e nergy and the smallest bits too then that some elements p air in disintegration thatyou give each a new name and tha t youmeld them into mathematicalmodels requiring symmetries then you fillin new holes with smaller bitsof that tha t looks like how nature is  not functioning thisis not an offense but itisno wonder its decades of no additional sc ientific gain init ************ itis a cumulativebondingflux with core charge and coutne r coat charge cumualtive creating charge balance equilibrium with with spikeout of chargeimbalance which forms a wineg lasslike spikeout deformed by atom composition cone clownmout h shingle  the chargeimbalance spikeout is not the 4kev b onding it redeclinates the position inside nuclei  as the reintegration coatchargeflip a neutron outof aproton alln ot toocomplicated the matter formation simply a relative  (!) chargeimbalance forming core and coat cumulatively  allth e matter antimatter bullshit symmetric universe whathappened allthe darkmatter darkenergy amatter of bonding flux cumual tive bondingflux web fromsubatomic tomacro tosupermacro eneergy teh core questions iswah t is energy waht is energyreally inrelationto charge im balance this. is the key question tothe universe ******** *** ofcourse the resonance effects once formed canbe fascin ating  but are derived already I am Christian KISS Bab yAWACS – Raw Independent Sophistication #THINKTANK + #INTEL #HELLHOLE #BLOG https://www.BabyAWACS.com/ Inquiry@BabyAWACS .com PHONE / FAX +493212 611 34 64 Helpful? Pay. Support. Do nnate. paypal.me/ChristianKiss

.@phys .@physics .@sciam @science @sciam .@science @sciam @nature @naturephysics @energy .@energy  https://physicswo rld.com/a/proton-contains-more-anti-down-quarks-than-anti-up/ this means nothing  ito nly means  that hadrons disintegrate  in a certainway w ith bigger energy and then the smallerbrackets with less e nergy and the smallest bits too then that some elements p air in disintegration thatyou give each a new name and tha t youmeld them into mathematicalmodels requiring symmetries then you fillin new holes with smaller bitsof that tha t looks like how nature is  not functioning thisis not an offense but itisno wonder its decades of no additional sc ientific gain init ************ itis a cumulativebondingflux with core charge and coutne r coat charge cumualtive creating charge balance equilibrium with with spikeout of chargeimbalance which forms a wineg lasslike spikeout deformed by atom composition cone clownmout h shingle  the chargeimbalance spikeout is not the 4kev b onding it redeclinates the position inside nuclei  as the reintegration coatchargeflip a neutron outof aproton alln ot toocomplicated the matter formation simply a relative  (!) chargeimbalance forming core and coat cumulatively  allth e matter antimatter bullshit symmetric universe whathappened allthe darkmatter darkenergy amatter of bonding flux cumual tive bondingflux web fromsubatomic tomacro tosupermacro eneergy teh core questions iswah t is energy waht is energyreally inrelationto charge im balance this. is the key question tothe universe ******** *** ofcourse the resonance effects once formed canbe fascin ating  but are derived already I am Christian KISS Bab yAWACS – Raw Independent Sophistication #THINKTANK + #INTEL #HELLHOLE #BLOG https://www.BabyAWACS.com/ Inquiry@BabyAWACS .com PHONE / FAX +493212 611 34 64 Helpful? Pay. Support. Do nnate. paypal.me/ChristianKiss

.@phys .@physics .@sciam @science @sciam .@science @sciam @nature @naturephysics @energy .@energy https://physicsworld.com/a/proton-contains-more-anti-down-quarks-than-anti-up/ this means nothing itonly means that hadrons disintegrate in a certainway with bigger energy and then the smallerbrackets with less energy and the smallest bits too then that some elements pair in disintegration thatyou…

[gliimpermeabili]

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Come un errore di programmazione diventò una pandemia virtuale nel mondo di World of Warcraft. 🎮 Te lo raccontiamo nella seconda puntata de #gliimpermeabili sul nostro canale YouTube. • ➡️Link in bio • #gliimpermeabili #S01E02 #cuovadis #rubrica #worldofwarcraft #WoW #blizzard #incident #corruptedblood #corruptedbloodincident #virtualgame #game #multiplayer #mmorpg #worldepidemics #erictlofgren #mathematicalmodeling #videogiochi #pandemic #architettura #architecture #coronavirus #covid19 #covid #virus #emergenzasanitaria #restiamoacasa #noirestiamoacasa #quarantena #confinamento https://www.instagram.com/p/B_rv9oyFsiK/?igshid=1mmus40etan67

[evoldir]

Job: UHull.ResAssoc.EvolutionParentalCare

ResearchAssociate in Phylogenetic Comparative Analysis School of Environmental Sciences We are looking to appoint a Research Associate in phylogenetic comparative analysis of parental care, who has or is presently working towards completingtheir PhD in Biology or relateddisciplines. The post is funded by the University of Hull. The RA will be a member of the EvolutionaryComparative Ecology Group (http://bit.ly/2okw5Xn) led by DrIsabella Capellini (http://bit.ly/2os5G7m)that investigates fundamental questions on the evolution of animal diversityusing state of the art phylogenetic comparative approaches, and offers adynamic research environment in which the RA can further develop their skills.The successful applicant will be a core member of the ‘Parental Care’ cluster includingDr James Gilbert, Dr Lesley Morrell and 2 PhD students, with whom the RA isexpected to work closely. Within the School, the successful applicant will alsobenefit from a rich and diverse research environment that includes the Ecologyand Environmental Change Group, and the Evolutionary Biology Group. This project extends our past work inmammals (West & Capellini 2016 NatureCommunications) to amphibians and fish. The RA will compile a large datasetof parental care behaviours in amphibians and fish, lead the analysis usingphylogenetic comparative methods to answer questions on the evolution of femaleand male uniparental care, and draft manuscripts. Depending on the RA’s skillsand interest, we may also investigate the project’s questions with mathematicalmodeling approaches. Essential: PhDin biology or related discipline near completion; knowledge of modernphylogenetic comparative methods, strong quantitative skills, evidence of workof publishable quality, excellent oral and written communication skills,demonstrable ability to work as an effective team member, and be reliable,self-motivated and well organized. Desirable: PhDin biology or related discipline, experience with phylogenetic comparativemethods, experience in testing hypotheses on phenotypic evolution acrossspecies, strong publication record, experience with R. The position is fixed term for 3 years. The start dateis 25th September 2017and no earlier than the 1st of August 2017. Salary range: £26,829 to £32,004 pa -Starting salaries according to qualification and experience. You can learn more about thisposition and apply onlineat: www.hull.ac.uk/jobs (Vacancy ref: FS0302).Applicants are required to submit a current CV and a covering letter detailing how their qualifications andexperience meet the job description and specification. Enquiries to Dr Isabella Capellini: I.Capellini@hull.ac.uk Closing date 27thApril 2017  Isabella Capellini via Gmail

[sukoptfe-blog]

POLYMER EXTRUSION PROCESS

Once a polymer has been melted, mixed and pressurised in an extruder, it is pumped through an extrusion die for continuous forming (after cooling and solidification) into a final product. The most common die types are flat, annular and proŽle. Products made by extrusion include pipe, tubing, coating of wire, plastic bottles, plastic films and sheets, plastic bags, coating for paper and foil, Ž bres, Ž laments, yarns, tapes and a wide array of proŽfiles.

Polymer extrusion through dies has certain similarities to the hot extrusion of metals.However, there are also signi-ficant differences. In metal extrusion the material is pushed forward by a ram, while in polymer extrusion the material is continuously supplied by a rotating screw. In hot metal extrusion the temperatures range from 340°C for magnesium to 1325°C for steel, and the corresponding pressures range from 35 to over 700 MPa.1 5 In polymer extrusion the temperatures seldom exceed 350°C, and pressures usually do not go much above 50 MPa at the screw tip. Solid phase extrusion of polymers has been developed for the production of certain high strength products.At low temperatures, the molecular orientation imparted by the forcing of the material through the shaping die remains in the extrudate. Solid state polymer extrusion has certain similaritiesto the cold extrusion of metals.

Blown film extrusion is the most important process for the production of thin plastic Žfilms from polyethylenes.The molten polymer is extruded through an annular die (normally of spiral mandrel construction) to form a thin walled tube which is simultaneously axially drawn and radially expanded. In most cases the blown film bubble is formed vertically upwards. The maximum bubble diameteris usually 1.2 – 4 times larger than the die diameter. The hot melt is cooled by annular streams of high speed air from external air rings, and occasionally also from internal air distributors. The solidiŽ ed Žfilm passes through a frame which pinches the top of the bubble and is taken up by rollers. Coextruded Žfilms with 3 – 8 layers (sometimes up to 11) are also produced by this process, for use in food packaging.

Cast Žfilm and sheet extrusion involves extruding a poly- mer through a  at die with a wide opening (up to 10 m), onto a chilled steel roller or rollers which quench and solidify the molten material. Film is generally defined as a product thinner than 0.25 mm, while sheet is thicker than this.The cast Žfilm process is used for very tight tolerances of thinŽ film, or for low viscosity resins. Most flat dies are of T slot or coathanger designs, which contain a manifold to spread the flowing polymer across the width of the die, followed downstream by alternating narrow and open slits to create the desired flow distribution and pressure drop. Most cast film lines manufactured today are coextrusion lines, com- bining layers from as many as seven extruders into the product through multimanifold dies, or single manifold dies with the aid of feedblocks.

In Žfilm extrusion, the shear rates at the die lips are usually ~103 s21. When the wall shear stress exceeds a certain value (usually 0.14 MPa in research papers, higher in industry with the help of additives),the extrudate surface loses its gloss owing to the sharkskin melt fracture phenomenon.Sharkskin can be described as a sequence of ridges visible to the naked eye, perpendicular to the flow direction.

Pipe and tubing extrusion involves pumping a molten polymer throughanannulardie,followingwhich the extruded product, while being pulled, passes through a vacuum sizer where it attains its final dimensions. This is followed by spray or immersion cooling and cutting to fixed lengths. Pipe of diameter up to 2 m or greater is made by this process, and tubing with diameters from 10 mm down to below 1 mm. The annular dies are normally of spider or spiral mandrel design.

In wire and cable coating processes, individual wires or wire assemblies are pulled at very high speed through a crosshead die, at right angles to the extruder axis. In high pressure extrusion, the polymer melt meets the wire or cable before the die exit, for example insulating of individual wires. In low pressure extrusion, the melt meets the cable after the die exit, for example jacketing of assemblies of insulated cables. Very high shear rates are frequently encountered in this process(up to 106 s2 1 ) and low viscosity resins are used.

ProŽfile extrusion is a manufacturing process used for products of constant cross-section. These can range from simple shapes to very complex profiles with multiple chambers and Žfingers. Examplesrange from picture frame mouldings, to automotive trim, to edging for tabletops,to window lineals. The extruded materials are classiŽ ed (roughly) as rigid or fiexible. The typical proŽle extrusion line consists of an extruder pumping a polymer through a proŽle die, followed by a sizing tank or calibrator, additional cooling troughs, a puller and a cutoff device. The design of profile dies requires considerable experience and patience.Output limitations in profile extrusion are encountered owing to either sharkskin (for thin products produced from high viscosity polymers) or the ability to cool thick walled products. Polymer pipe and proŽfile extrusion is similar to the hot extrusion of metals for the production of continuous hollow shapes of barlike objects. However, the mathematicalmodelling of these processesfor metals is based mainly on elastic – plastic flow hypotheses.

In melt spinning, the molten polymer ows through numerous capillaries in a spinneret (up to 1000). The poly- mer is delivered under pressure by a gear pump for accurate metering, after passing through a Ž lter which follows the extruder. On exiting the capillaries, the Ž laments are attenuated to the desired diameter.For the production of very thin Žfibres, the melt blowing process is used. In this process the bres are attenuated by the drag force exerted by a high velocity air jet.