Creality CR-PLA Wood (White Pine) Filament.Creality's CR-Wood PLA filament is ideal for creating figurines and more. It stands out for its beautiful wood color, high strength and resistance to distortion. It allows smooth and fast printing - without clogging the nozzle. What's more, it's made of durable and environmentally friendly materials. At the same time, it is compatible with most FDM printers on the market.Top quality manufacturingEnvironmentally friendly, biodegradable materials were used to make the filament, which is characterized by very high durability. Its undoubted advantage is also its elegant wood color - you will successfully use it, for example, for printing decorations.Smooth printingThe filament allows you to print 3D models smoothly and quickly - at speeds of up to 90 mm/s. It is distinguished by excellent adhesion and low shrinkage. It is also resistant to distortion and minimizes the risk of clogging the printer nozzle. All this will allow you to print your chosen parts with ease and save time! ManufacturerCrealityNameCR-Wood FilamentModel3301130001ColorWhite pinePrinting temperatureFrom 190°C to 230°CPrinting speed40-90 mm/secFilament diameter1.75 mmWeight1 kg
Rohelusse mattunud Jeju saarelt pärineva 98% naturaalse aaloe sisaldus annab Su nahale tõelise värskuselaengu ja vajaliku niisutuse. - rahustab ja värskendab välisteguritest ärritunud nahka - sobib ka tundlikule nahale, kuna ei sisalda 18 kahjuliku ainete nimekirja kantud koostisosa - veepõhine tootevalem värskendab koheselt kurnatud nahka, jätmata nahale kleepuvat kihti! - niisutav koostis katab naha hooldava kaitsekihiga - kõik-ühes geel-sprei sobib nii näole kui kehale kandmiseks!
Päiksevarjuki peamine eesmärk on hoida objektiivi esiläätsest eemal pildikvaliteeti vähendav külgvalgus. Samuti kaitseb varjuk esiläätse mingil määral ka kahjustuste eest (näiteks kukkumisel või löögi korral)., Sobivus: Canon EF 70-200mm F2.8L USM.
Kõrgetasemeline reageerimisvõime Ülireageeriv turvisemustri disain kohandub pidevalt teega, tagades maanteega optimaalse kokkupuuteala. Suurepärane juhitavus „Dynamic Response“ tehnoloogia: aramiidi ja nailoni hübriidvöö tagab juhtimisotsuste optimaalse edastamise maanteele. Erakordne haarduvus kuival ja parem pidurdamine märjal teel „Bi-Compound“ tehnoloogia: turvises on kasutatud 2 erinevat elastomeeri -välimine pool: uudne hübriidelastomeer, mis tagab haarduvuse KUIVAL teel -sisemine pool: uudne ühendisegu, mille erilised „funktsionaalsed elastomeerid“ ja räni tagavad suurepärase haarduvuse ja pidurdamisel MÄRJAL teel.
An acclaimed textile designer, author, artist, and photographer, Alice Starmore is a native of Scotland's Isle of Lewis. Starmore has taught and lectured extensively throughout Britain, Europe, and the United States. She has written 16 books and countless magazine articles, and her classic Book of Fair Isle Knitting is the work that introduced Americans to the popular traditional technique. 4 Questions with Alice Starmore: An Exclusive Dover Interview Alice Starmore has a fascinating tale to tell. We spoke to the author of the #1 crafts bestseller Alice Starmore's Book of Fair Isle Knitting about her knitting background, professional start, and more. Clearly, knitting is a deeply ingrained facet of the culture of Scotland's Outer Hebrides. Did your mother teach you to knit? My mother taught me to knit when I was very young. She was a dressmaker as well as a knitter and our house was a place of constant creativity. I was also born at a time when most women knitted as a matter of course, and I had three aunts who had been fisher girls in their youth and were experts at making traditional fishermen's gansies. I understand that your first language is Gaelic — do you still speak it?Yes I still speak Gaelic. The Isle of Lewis, where I live, is in the Outer Hebrides — the heartland of Gaelic and the only place where you will hear the language in everyday use.How did you get your start professionally?I designed a small collection of knitwear in 1975 and successfully sold it in London boutiques. It was featured in a national newspaper and from that small beginning my knitting career evolved in ways that were quite unimaginable to me when I began. Your books are known and loved around the world, and you've adapted design elements from the textile arts of many countries into your repertoire. Are you still discovering "new" aspects of knitting and fabric arts from other cultures?I am interested in everything. I find inspiration in all aspects of the world around me. There is enough inspiration in the natural world on my doorstep to last many lifetimes. I am also inspired by art, culture, history, science and music. My own culture features widely in my design work but I have always been interested in other cultures and in other places. My main problem is that I cannot possibly live long enough to produce work from the amount of ideas that come into my head.
As in its parent game Kakerlakenpoker, Kakerlakenpoker Royal has nothing to do with poker except that the game is all about bluffing, but with cards showing cockroaches, rats and stink bugs instead of queens, 10s and aces. To set up the game, shuffle the deck and deal the cards out to players. On a turn, a player takes one card from his hand, lays it face down on the table, slides it to a player of his choice, and declares a type of critter, e.g., "Stink bug". The player receiving the card either: Accepts the card, says either "true" or "false", then reveals the card. If this player is wrong in her claim, she keeps the card on the table in front of her face up; if she is right, the player who gave her the card places it face up before him. Passes the card to another player, peeking at it first, then keeping it face-down and either saying the original type of critter or saying a new type. This new player again has the choice of accepting the card or passing it, unless the card has already been seen by all other players in which case the player must accept it and make a true/false claim. The game ends when a player has no cards to pass on his turn or when a player has four cards of the same critter on the table in front of him. In either case, this player loses and everyone else wins. To this, Kakerlakenpoker Royal adds new rules and new nasty "royal" critters to create more options for players during the game.
Värvi ja kaunista lemmiktegelastega! Värvi oma lemmiktegelased ja kaunista lehed lõbusate lugudega. Reisisõbralik Crayola tegevusraamat on lihtne ja mugav kaasa haarata nii reisidele, kui ka lõbus koduseks ajaviiteks. Komplektis on 32 lehekülge värvimist ja lõbusaid tegevusi, nagu labürindid, peidetud pildid ja sobitamismängud. Kaasas on 7 mahapestavat Pip-Squeak markerit ning hoiukarp markerite jaoks.
Richard Feynman (1918-88) received the 1965 Nobel Prize in Physics for his contributions to the development of quantum electrodynamics. One of the best-known scientists of his generation, Feynman assisted in the development of the atomic bomb and was a prominent member of the panel that investigated the 1986 Challenger disaster.Known worldwide as the voice of NASA's Jet Propulsion Lab, Albert R. Hibbs (1924-2003) studied for his doctorate under Feynman's tutelage and transcribed and edited Feynman's lectures in quantum electrodynamics.Daniel F. Styer holds a Ph.D. from Cornell University and is the John and Marianne Schiffer Professor of Physics at Oberlin College. Richard P. Feynman: The Scientist's Scientist One of the most famous scientists of the twentieth century, and an inexhaustible source of wonderful quotes, Richard Feynman shared the 1965 Nobel Prize in Physics with Julian Schwinger and Sin-Itiro Tomonaga for his contributions to the development of quantum electrodynamics. 1965 was also the year in which Feynman and A. R. Hibbs first published Quantum Mechanics and Path Integrals, which Dover reprinted in a new edition comprehensively emended by Daniel F. Styer in 2010. In the Author's Own Words:"Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle. It is our responsibility as scientists to proclaim the value of this freedom; to teach how doubt is not to be feared but welcomed and discussed; and to demand this freedom as our duty to all coming generations." "I think I can safely say that nobody understands quantum mechanics." "Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there." "To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature. . . . If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in." — Richard P. Feynman
Partial Differential Equations & BeyondStanley J. Farlow's Partial Differential Equations for Scientists and Engineers is one of the most widely used textbooks that Dover has ever published. Readers of the many Amazon reviews will easily find out why. Jerry, as Professor Farlow is known to the mathematical community, has written many other fine texts — on calculus, finite mathematics, modeling, and other topics. We followed up the 1993 Dover edition of the partial differential equations title in 2006 with a new edition of his An Introduction to Differential Equations and Their Applications. Readers who wonder if mathematicians have a sense of humor might search the internet for a copy of Jerry's The Girl Who Ate Equations for Breakfast (Aardvark Press, 1998). Critical Acclaim for Partial Differential Equations for Scientists and Engineers:"This book is primarily intended for students in areas other than mathematics who are studying partial differential equations at the undergraduate level. The book is unusual in that the material is organized into 47 semi-independent lessonsrather than the more usual chapter-by-chapter approach. "An appealing feature of the book is the way in which the purpose of each lesson is clearly stated at the outset while the student will find the problems placed at the end of each lesson particularly helpful. The first appendix consists of integral transform tables whereas the second is in the form of a crossword puzzle which the diligent student should be able to complete after a thorough reading of the text. "Students (and teachers) in this area will find the book useful as the subject matter is clearly explained. The author and publishers are to be complimented for the quality of presentation of the material." — K. Morgan, University College, Swansea
Preface to Revised edition Preface1. Mathematical Review 1.1 Linear Algebra 1.1.1 Three-dimensional vector algebra 1.1.2 Matrices 1.1.3 Determinants 1.1.4 N-Dimensional Complex Vector spaces 1.1.5 Change of Basis 1.1.6 The Eigenvalue Problem 1.1.7 Functions of Matrices 1.2 Orthogonal functions, Eigenfunctions, and Operators 1.3 The Variation Method 1.3.1 The Variation principle 1.3.2 The Linear Variational Problem Notes, Further Reading2. Many Electron Wave functions and operators 2.1 The Electronic Problem 2.1.1 Atomic Units 2.1.2 The Born-Oppenheimer Approximation 2.1.3 The Antisymmetry or Pauli Exclusion Principle 2.2 Orbitals, Slater Determinants, and Basis functions 2.2.1 Spin Orbitals and Spatial Orbitals 2.2.2 Hartree Products 2.2.3 Slater Determinants 2.2.4 The Hartree-Fock Approximation 2.2.5 The Minimal Basis H subscript 2 Model 2.2.6 Excited Determinants 2.2.7 Form of the Exact Wave function and Configuration Interaction 2.3 Operators and Matrix Elements 2.3.1 Minimal Basis H subscript 2 matrix Elements 2.3.2 Notations for One- and Two-Electron Integrals 2.3.3 General Rules for Matrix Elements 2.3.4 Derivation of the Rules for Matrix Elements 2.3.5 Transition from Spin Orbitals to Spatial Orbitals 2.3.6 Coulomb and Exchange Integrals 2.3.7 Pseudo-Classical interpretation of Determinantal Energies 2.4 Second Quantization 2.4.1 Creation and annihilation Operators and Their Anticommutation Relations 2.4.2 Second-Quantized Operators and Their Matrix Elements 2.5 Spin-Adapted Configurations 2.5.1 Spin Operators 2.5.2 Restricted Determinants and Spin-Adapted Configurations 2.5.3 Unrestricted Determinants Notes, Further Reading3. The Hartree-Fock Approximation 3.1 The Hartree-Fock Equations 3.1.1 The Coulomb and Exchange Operators 3.1.2 The Fock Operator 3.2 Derivation of the Hartree-Fock Equations 3.2.1 Functional Variation 3.2.2 Minimization of the Energy of a Single Determinant 3.2.3 The Canonical Hartree-Fock Equations 3.3 Interpretation of Solutions to the Hartree-Fock Equations 3.3.1 Orbital energies and Koopmans' Theorem 3.3.2 Brillouin's Theorem 3.3.3 The Hartree-Fock Hamiltonian 3.4 Restricted Closed-Shell hartree-Fock: The Roothaan Equations 3.4.1 Closed-Shell Hartree-Fock: Restricted Spin Orbitals 3.4.2 Introduction of a Basis: The Roothaan Equations 3.4.3 The Charge Density 3.4.4 Expression for the Fock Matrix 3.4.5 Orthogonalization of the Basis 3.4.6 The SCF Procedure 3.4.7 Expectation Values and Population Analysis 3.5 Model Calculations on H subscript 2 and HeH superscript + 3.5.1 The 1s Minimal STO-3G Basis Set 3.5.2 STO-3G H subscript 2 3.5.3 An SCF Calculation on STO-3G HeH superscript + 3.6 Polyatomic Basis Sets 3.6.1 Contracted Gaussian functions 3.6.2 Minimal Basis Sets: STO-3G 3.6.3 Double Zeta Basis Sets: 4-31G 3.6.4 Polarized Basis Sets: 6-31G and 6-31G 3.7 Some Illustrative Closed-Shell Calculations 3.7.1 Total Energies 3.7.2 Ionization Potentials 3.7.3 Equilibrium Geometries 3.7.4 Population Analysis and Dipole Moments 3.8 Unrestricted Open-Shell Hartree-Fock: The Pople-Nesbet Equations 3.8.1 Open-Shell Hartree-Fock: Unrestricted Spin Orbitals 3.8.2 Introduction of a Basis: The Pople-Nesbet Equations 3.8.3 Unrestricted Density Matrices 3.8.4 Expression for the Fock Matrices 3.8.5 Solution of the Unrestricted SCF Equations 3.8.6 Illustrative Unrestricted Calculations 3.8.7 The Dissociation Problem and its Unrestricted Solution Notes, Further Reading4. Configuration Interaction 4.1 Multiconfigurational Wave Functions and the Structure of the Full CI Matrix 4.1.1 Intermediate Normalization and an Expression for the Correlation Energy 4.2 Doubly Excited CI 4.3 Some Illustrative Calculations 4.4 Natural Orbitals and the One-Particle Reduced Density Matrix 4.5 The Multiconfiguration Self-Consistent Field (MCSCF) and Generalized Valence Bond (GVB) Methods 4.6 Truncated CI and the Size-Consistency Problem Notes, Further Reading5. Pair and Coupled-Pair Theories 5.1 The Independent Electron Pair Approximation (IEPA) 5.1.1 Invariance under Unitary Transformations: an example 5.1.2 Some Illustrative Calculations 5.2 Coupled-Pair Theories 5.2.1 The Coupled Cluster Approximation (CCA) 5.2.2 The Cluster Expansion of the Wave Function 5.2.3 Linear CCA and the Coupled Electron Pair Approximation (CEPA) 5.2.4 Some Illustrative Calculations 5.3 Many-Electron Theories with Single Particle Hamiltonians 5.3.1 The Relaxation Energy via CI, IEPA, CCA, and CEPA 5.3.2 The Resonance Energy of Polyenes in Hückel Theory Notes, Further Reading6. Many-Body Perturbation Theory 6.1 Rayleigh-Schrödinger (RS) Perturbation Theory 6.2 Diagrammatic Representation of RS Perturbation Theory 6.2.1 Diagrammatic Perturbation Theory for 2 States 6.2.2 Diagrammatic Perturbation Theory for N States 6.2.3 Summation of Diagrams 6.3 Orbital Perturbation Theory: One-Particle Perturbations 6.4 Diagrammatic Representation of Orbital Perturbation Theory 6.5 Perturbation Expansion of the Correlation Energy 6.6 The N-Dependence of the RS Perturbation Expansion 6.7 Diagrammatic Representation of the Perturbation Expansion of the Correlation Energy 6.7.1 Hugenholtz Diagrams 6.7.2 Goldstone Diagrams 6.7.3 Summation of Diagrams 6.7.4 What Is the Linked Cluster Theorem? 6.8 Some Illustrative Calculations Notes, Further Reading7. The One-particle Many-Body Green's Function 7.1 Green's Functions in single Particle Systems 7.2 The One-Particle Many-Body Green's Function 7.2.1 The Self-Energy 7.2.2 The solution of the Dyson Equation 7.3 Application of the formalism to H subscript 2 and HeH superscript + 7.4 Perturbation Theory and the Green's Function Method 7.5 Some Illustrative Calculations Notes, Further ReadingAppendix A. Integral Evaluation with 1s Primitive GaussiansAppendix B. Two-Electron Self-Consistent-Field ProgramAppendix C. Analytic Derivative methods and Geometry OptimizationAppendix D. Molecular Integrals for H subscript 2 as a Function of Bond Length Index
Classic text offers exceptionally precise coverage of partial differentiation, vectors, differential geometry, Stieltjes integral, infinite series, gamma function, Fourier series, Laplace transform, much more. Includes exercises and selected answers.
By the author of The Handmaid's Tale and The Testaments A leathery bog-man transforms an old love affair; a sweet, gruesome gift is sent by the wife of an ex-lover; landscape paintings are haunted by the ghost of a young girl. This dazzling collection of ten short stories takes us into familiar Atwood territory to reveal the logic of irrational behaviour and the many textures lying beneath ordinary life. 'Atwood is a writer of importance, with a deep understanding of human behaviour, a beautiful understated style and, rarest of all, a broad scope' Marilyn French 'Funny, sharp and always incisive' Time Out 'Everything Atwood forms in words has substance and weight' Daily Telegraph 'Margaret Atwood deserves an adjective - Atwoodian - in recognition of her virtuoso wit and unmistakable style' Chicago Tribune
