eBooks de Historia de la ciencia, página 18 de 61

Whether it is true or not that not more than twelve persons in all the world are able to understand Einsteins Theory, it is nevertheless a fact that there is a constant demand for information about this much-debated topic of relativity. The books published on the subject are so technical that only a person trained in pure physics and higher mathematics is able to fully understand them. In order to make a popular explanation of this far-reaching theory available, the present book is published.Professor Lorentz is credited by Einstein with sharing the development of his theory. He is doubtless better able than any other manexcept the author himselfto explain this scientific discovery.

This book deals with the works of Graham Bell and other scientists on the phenomena of sound and its production.In bringing before you some discoveries made by Mr. Sumner Tainter and myself, which, having resulted in the construction of apparatus for the production and reproduction of sound by means of light, it is necessary to explain the state of knowledge which formed the starting-point of our experiments. I shall first describe the remarkable substance selenium, and the manipulations devised by various experimenters; but the final result of our researches has extended the class of substances sensitive to light-vibrations, until we can propound the fact of such sensitiveness being a general property of all matter.ABOUT THE AUTHOR Alexander Graham Bell (18471922) was a Scottish-born inventor, scientist, teacher of the deaf, and innovator who is best known for inventing the telephone.

The probability that the most accurate method of determining the solar parallax now available is that resting on the measurement of the velocity of light, has led to the acceptance of the following paper as one of the series having in view the increase of our knowledge of the celestial motions. The researches described in it, having been made at the United States Naval Academy, though at private expense, were reported to the Honorable Secretary of the Navy, and referred by him to this Office. At the suggestion of the writer, the paper was reconstructed with a fuller general discussion of the processes, and with the omission of some of the details of individual experiments.

It is not my intention in this paper to give a detailed account of the natural disintegration of the radio elements or of the methods employed to effect the artificial disintegration of certain light elements. I shall assume that you all have a general knowledge of the results of these investigations, but I shall confine myself to a consideration of the bearing of these results on our knowledge of the structure of the nuclei of atoms.(The Author - 1924)

In this work, I have endeavoured to give a complete and connected account, from a physical standpoint, of the properties possessed by the naturally radio-active bodies. I have found the theory that the atoms of the radio-active bodies are undergoing spontaneous disintegration extremely serviceable, not only in correlating the known phenomena, but also in suggesting new lines of research.The present edition includes a large amount of new material relating to the nature and properties of the radiations and the emanations. In the limits of this book, it would have been found impossible, even had it been thought desirable, to include more than a brief sketch of the physiological effects of the rays.(E. RUTHERFORD - 1905)

Nordmann has presented Einsteins principle in words which lift the average reader over many of the difficulties he must encounter in trying to take it in.Remembering Goethes maxim that he who would accomplish anything must limit himself, he has not aimed at covering the full field to which Einsteins teaching is directed. But he succeeds in making many abstruse things intelligible to the layman.Einsteins theories have brought about a profound revolution in science. In their light the world seems simpler, more co-ordinated, more in unison.

Since the discovery of strongly radioactive substances, research on radioactivity has been greatly developed. I propose in this article to give an account of the actual state of our knowledge relative to this subject, laying particular stress on the most recent work.(Pierre Curie - 1904)

Come sarebbe un libro con una struttura fisica e concettuale che non potrebbe assumere? In cui i paragrafi, e forse anche le parole e le lettere, non fossero disposti con ordine ma distribuiti casualmente? Come sarebbe descritta la proposta dellabbandono di ogni teoria senza farne una teoria, una proposta o una descrizione? E come sarebbe farlo con una lingua che non puo essere altro che convenzionale e con parole che non hanno un significato se non quello arbitrariamente attribuito loro? Come sarebbe farlo lamentando la mancanza di esplicitazione del meccanismo che regola lassegnazione e luso dei nomi, sottolineando che la logica puo solo essere relativa e che vari tipi di falsita sono piu adatti di un solo tipo di verita per essere usati per interpretare cio che viene comunicato? Come potrebbero essere date risposte a queste domande se anche la conoscenza fosse messa in dubbio e il domandare stesso questionato? Apparizione del Dissolventismo

The Italian physicist Ettore Majorana mysteriously disappeared in 1938. Majorana was part of the famous Via Panisperna group directed by Enrico Fermi. In those years the model of heavy atom (that is, with many electrons) was proposed, and Fermi elaborated a model based on Statistical Quantum Mechanics known as the Thomas-Fermi model (as established in the same period by Llewellyn Thomas). This model was governed by a nonlinear second-order differential equation. Numerical integration was extremely complicated. Fermi and his group had been working on it for a week. Ettore Majorana only needed one nights work not only to integrate the equation, but to develop a sophisticated algorithm for the solution of an entire class of differential equations. In the ebook that we offer today we present our solution obtained with the aid of the Mathematica software.Subjects:Genesis of the Thomas - Fermi equationHistorical noteA particular integral of the Thomas-Fermi equationA boundary problemA boundary problemComplete solutionMarcello Colozzo, a graduate in Physics, has been involved in online teaching of Mathematics and Physics since 2008 through the Extra Byte website where "simulations" are performed in the Mathematica computing environment. In recent years he has published various articles on mathematical physics and collaborates with the Electronic Open Source magazine. An avid reader of cyberpunk fiction, he has attempted to transition into "cyber writer" status by publishing various anthologies of short stories.

Max Planck was unintentionally a revolutionary. In fact, in dealing with a thorny problem that afflicted physics at the end of the 19th century (the black body emission spectrum) he used a mathematical trick to ensure the convergence of what mathematicians call the "integral generalized". And not only that, his solution was in perfect agreement with the experimental data. "Unfortunately" (for Planck who adhered to the paradigm of classical physics), what he had used was much more than a simple artifice: Nature was revealing something very interesting to us.Ebook Topics:Experimental featuresStefan-Boltzmann law.Wiens law.Displacement lawTheoretical settingThe Rayleigh-Jeans radiation formulaMarcello Colozzo, a graduate in Physics, has been involved in online teaching of Mathematics and Physics since 2008 through the Extra Byte website where "simulations" are performed in the Mathematica computing environment. In recent years he has published various articles on mathematical physics and collaborates with the Electronic Open Source magazine. An avid reader of cyberpunk fiction, he has attempted to transition into "cyber writer" status by publishing various anthologies of short stories.

WHY WE SLEEP Unlocking the Power of Sleep and Dreams"Unlock the secrets of a good nights sleep with "Why We Sleep" - a fascinating and illuminating journey through the science of slumber and the mysteries of the dream world. Discover the essential role of sleep in our physical and mental well-being and learn how to harness its power for a happier, healthier life."DISCLAIMER:This Is Not A Book By Matthew Walker, Nor Is It Affiliated With Him. It Is An Independent publishing by Mega Reads That Summarizes His Book In Detail.Please note that this summary book cannot replace Matthew Walkers book or serve as the main book.This is a detailed analysis and summary of His book.

Questo ben documentato studio di Daniele Biancardi si sviluppa dalleta arcaica a Galileo Galilei, passando per il Medioevo e il Rinascimento e, in particolare, concludendosi con la figura sino a ora non adeguatamente valorizzata dellastronomo e geografo gesuita stellatese Giovanni battista Riccioli (1598-1671), autore del celebre trattato Alamgestum novum.

Zusammenfassung von Das Universum fur Eilige - Woraus bestehen Raum und Zeit? Welchen Platz nimmt der Mensch im Kosmos ein? Wie passen wir in das Universum? Heutzutage haben nur wenige von uns die Zeit, uber das Universum nachzudenken. Diese Zusammenfassung bringt das Universum kurz und pragnant in Kapiteln auf den Boden der Tatsachen, die Sie jederzeit und uberall in Ihrem geschaftigen Tag lesen konnen. Sie erklart vom Urknall bis zu schwarzen Lochern, von Quarks bis zur Quantenmechanik und von der Suche nach Planeten bis zur Suche nach auerirdischem Leben. Sie konnen es lesen, wahrend Sie auf Ihren Tee oder Kaffee warten, oder wahrend Sie auf den Bus, den Zug oder das Flugzeug warten, um anzukommen.Haftungsausschluss: Dies ist eine Zusammenfassung des Buches, nicht das Originalbuch, und enthalt Meinungen uber das Buch.

La chimica ela tavolozza della vita. Tutto cio che siamo eche vediamo, ogni giorno, echimica. Monolocali metropolitani eville hollywoodiane hanno tante differenze, ma non possono differire per la scienza che le riempie. La chimica esotto inostri occhi, dentro il frigorifero, sul soffitto, nellarmadio occorre solo esserne consapevoli!

Disciplina spesso misteriosa ecomplessa, la fisica viene qui raccontata quale esperienza intellettuale esentimentale, mostrando il modo in cui influenza linterpretazione della realta e come isuoi concetti diventano azioni esensazioni, eviceversa. La fisica come esperienza di vita, in cui il concetto di equilibrio eil cardine interpretativo per comprendere la natura apartire dalla sua osservazione, atto che coinvolge tutti isensi esfrutta la capacita percettiva per analizzare ecomprendere ifenomeni naturali. Il libro segue il filo rosso dellequilibrio eintreccia iprincipi della scienza con lesperienza umana, dedicando ogni capitolo auna specifica azione: crescere, difendere, cambiare, proteggere, orientarsi, scoprire, ricordare, legare efluire.

Cosa significa vita? Quali sono ifondamenti chimici ebiologici da cui ha origine? Ecome si spiega levoluzione? Lautore risponde aqueste domande, ripercorrendo le fasi della nascita del Sistema solare edel nostro pianeta apartire dalla nebulosa originaria. Attraversando le ere geologiche, che hanno visto la comparsa elo sviluppo dei primi organismi viventi, viene proposta unanalisi critica ecostruttiva delle teorie che spiegano le origini elevoluzione biologica, valutandone prove afavore epunti deboli.

Vi siete mai chiesti come atomi piccolissimi possano unirsi coerentemente fino a formare la materia che ci circonda? Siete curiosi di conoscere come possano i processi quantistici diventare effetti macroscopici visibili a occhio nudo? Vi intrigano le moderne nanotecnologie e la scoperta di nuovi materiali innovativi? "Il Metallo, lIsolante e il Superconduttore" e un libro che potra soddisfare queste vostre curiosita. Verrete guidati attraverso diversi argomenti scientifici tipici della fisica della materia condensata, ovvero la branca della fisica che si occupa dello studio delle diverse forme della materia e dei processi fisici in atto al suo interno. La fisica della materia e inoltre un baluardo per la moderna ricerca del complesso e le diverse applicazioni in cui essa si ramifica. Questo libro si pone lobiettivo di presentare dei concetti scientifici estremamente attuali, poiche interfacciabili con molte altre branche della ricerca scientifica quali le nanotecnologie, lingegneria, la biologia e le scienze della complessita, offrendo un retroterra culturale difficilmente rinvenibile in ulteriori opere saggistiche. In aggiunta, vuole presentarsi come uno strumento in ambito accademico per gli studenti interessati, garantendo uno sguardo a tutto tondo sugli argomenti di piu grande attualita nel campo della fisica della materia condensata.

In this book, Oris continues to give full answers to inmost and fundamental questions of cosmic and human existence: about Earth and universal destinies, the nature of life and death, Soul and God, good and evil, about our relations with one another, the nature of Space-Time and how the entire visible and invisible-to-us reality is formed.The Universal Knowledge given by Oris offers the fundamentals of a new and unique world view for all of us. It allows us to penetrate the mystery of eternal existence to an extent inaccessible before, reasonably and substantially solving the problems therein, offering convincing answers which are not available in any religious world view, philosophical movement or scientific theory. Oriss Information expands the limits of human experience and perception literally to infinity!

The third volume of IISSIIDIOLOGY Fundamentals allows readers to go deeper into yet completely unexplored by us structures that provide functioning of human Self-Consciousness and its interconnections with Self-Consciousnesses Forms focused by it. First two volumes of IISSIIDIOLOGY Fundamentals thoroughly describe the deep Nature of Causes and Mechanisms of Creative Activity of everything manifested in multidimensional and different-Qualitative Macrocosmos, including also qualitative Basis of Focus Dynamics of Form-Creators of Universal Structures. The third volume in its turn focuses on the detailed description of basic Principles of exhiberation of Human and other Self-Consciousnesses Forms in all the diversity of different-dimensional diapasons of the Tertiary Illusion.To allow the reader to fully comprehend the essence of the notion Self-Consciousness Form, the author describes realization functions of these structures at the example of subjective formation as a result of life creativity of every personality of so called personalistic Worlds, which goes far beyond existing scientific notions about the surrounding reality and peculiarities of interaction between Forms structuring it, whether it is a human, a planet, or an elementary particle. Furthermore, he describes different-dimensional variety of Forms of lluuvvumic Direction of development and characteristics of focal realization of Humankind Collective Cosmic Intelligence as a unified the LLUU-VVU-Entity.The third volume ends with a detailed description of multi-level manifestation of Plasmic Forces Diapasons of our Universe, which are described from a position of their subjective interpretation through the specific peculiarities of human Perception systems. Endless inner transformations of Universal Illusion, as mechanisms of evolutional growth of the Cosmic Human on its Way to its Universal Future, lets inquisitive readers to form in their Self-Consciousness own highly intuitive conceptions about endless varieties of all possible variants of development, where goes the process of eternal multidimensional Existence of every human personality.

Thoughtful study of this material allows the reader to get a more objective idea of the material basis of idealism by developing, in particular, quantum theory of Consciousness on the example of "microtubule concept". The reader will also learn about chakram determinacy of Focus Dynamics of all Self-consciousness Forms, will get an understanding of primary connections of thought formation, will get unique information about informational-energy conditionality of ontogenesis and embryogenesis, pathogenesis in general and hereditary diseases in particular, and finally will discover the universal etiological model of one of the most complex human feelings - the feeling of love.