Science & Nature - Books

Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives

Science & Nature

Presents applied theory and advanced simulation techniques for electric machines and drivesThis book combines the knowledge of experts from both academia and the software industry to present theories of multiphysics simulation by design for electrical machines, power electronics, and drives. The comprehensive design approach described within supports new applications required by technologies sustaining high drive efficiency. The highlighted framework considers the electric machine at the heart of the entire electric drive. The book also emphasizes the simulation by design concept—a concept that frames the entire highlighted design methodology, which is described and illustrated by various advanced simulation technologies.Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives begins with the basics of electrical machine design and manufacturing tolerances. It also discusses fundamental aspects of the state of the art design process and includes examples from industrial practice. It explains FEM-based analysis techniques for electrical machine design—providing details on how it can be employed in ANSYS Maxwell software. In addition, the book covers advanced magnetic material modeling capabilities employed in numerical computation; thermal analysis; automated optimization for electric machines; and power electronics and drive systems. This valuable resource: Delivers the multi-physics know-how based on practical electric machine design methodologies Provides an extensive overview of electric machine design optimization and its integration with power electronics and drives Incorporates case studies from industrial practice and research and development projects Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives is an incredibly helpful book for design engineers, application and system engineers, and technical professionals. It will also benefit graduate engineering students with a strong interest in electric machines and drives.

下一場人類大瘟疫

Science & Nature

我們無法避開這些可怕疾病而置身事外,因為我們就活在自然界裡, 人類常常忘了,自己也是動物之一,而且和其他動物密不可分! 2003年肆虐中港台的SARS疫情,會不會再次死灰復燃? 伊波拉病毒什麼時候會在非洲以外地區爆發大流行? 從HIV、亨德拉病毒、伊波拉、禽流感到SARS……, 新興疾病從其他動物跨物種跳躍到人類宿主的機會越來越頻繁, 演化會不會終將造就出無法遏止的超級病原? 下一場凶殘的人類大規模流行病,殺害數百萬人的重大疫情,肯定是一種新疾病引發的──至少是人類新遇上的種類。致病原禍首肯定是我們陌生的,不熟悉的,卻也不會是從外太空來的。這種殺手病原體──最可能是種病毒──很有可能是從非人類動物外溢傳進人群。

Vegetable Oil in Energy, Volume 1

Science & Nature

Vegetable Oil in Energy, Volume 1: Biofuel Technology examines the conversion processes involved in the production of biofuels from vegetable oils. With a strong focus on methodologies and protocols, the book provides step-by-step guidance on a comprehensive range of production pathways for liquid and gaseous biofuels. The first part of the book provides an overview of present vegetable oil production. Subsequent chapters describe the key production pathways, including pyrolysis, decarboxylation, deoxygenation, catalytic cracking processes, esterification, trans-esterification, anaerobic digestion, catalytic pyrolysis, and more. The economic potential of different vegetable oil feedstocks is discussed within each chapter.Finally, chapters are dedicated to sustainability, examining the environmental and socioeconomic impact of production, with an emphasis on GHG emission reduction. This book provides readers with the latest developments in the production of biofuels from vegetable oils, which will be of interest to students, researchers, and industry professionals involved in bioenergy and renewable energy, and may be of interest to interdisciplinary teams working across biotechnology, chemistry, chemical engineering, environmental science and sustainability sciences. - Presents the latest advances in biofuel technology, including the use of microreactors, ultrasonic-assisted systems, microwave-assisted systems, high shear mixing reactors and supercritical processes - Provides step-by-step guidance on the latest methods and processes - Assesses the sustainability of the various biofuels production pathways from edible and non-edible vegetable seed oil

Antifrágil

Science & Nature

En El cisne negro, Taleb nos mostró que los acontecimientos altamente improbables e impredecibles son parte integrante de nuestro mundo. En Antifrágil, Taleb da la vuelta a la incertidumbre y la hace deseable, incluso necesaria.Igual que los huesos humanos se fortalecen cuando están bajo tensión, muchas otras cosas se benefician de la presión, el caos, la inestabilidad o la confusión. En esta obra, Nassim Nicholas Taleb identifica y denomina «antifrágil» a esa categoría de cosas que no solo se benefician del caos, sino que lo necesitan para sobrevivir y florecer y que además es inmune a los errores de predicción.Sumamente ambicioso, documentado, ingenioso y multidisciplinario, Antifrágil nos ofrece un programa sobre cómo comportarnos —y prosperar— en un mundo que no comprendemos, y que es demasiado incierto como para que intentemos descifrarlo y predecirlo. El mensaje de Taleb es revolucionario: solo lo antifrágil perdurará.

Advances in Nanotechnology and Its Applications

Science & Nature

This book highlights current trends and research advances in nanotechnology and its applications. It discusses the synthesis and characterization of nanomaterials / nanocomposites for novel applications in environmental monitoring and sustainability, and presents new findings on wastewater treatment technologies using nanofiltration membranes.

Computational Intelligence in Bioprinting

Science & Nature

COMPUTATIONAL INTELLIGENCE IN BIOPRINTING The book provides a comprehensive exploration of the evolving field of bioprinting in regenerative medicine and is an essential guide for professionals seeking a thorough understanding of the field. Computational Intelligence in Bioprinting provides a comprehensive overview of the evolving field of bioprinting in reformative medicine, defining the process of printing structures using viable cells, biomaterials, and living molecules. The primary goal is to provide substitutes for tissue implants, which might lead to eliminating the requirement for organ donors, as well as to transform animal testing for the learning and analysis of disease and the growth of treatments. The book offers a comprehensive overview of bioprinting technologies and their applications, emphasizing the integration of computation intelligence, artificial intelligence, and other computer science advancements in the field. By harnessing the power of computational intelligence techniques such as AI, machine learning, optimization algorithms, and data analytics, existing hurdles can be overcome and the full potential of bioprinting can be unlocked. The book covers an extensive range of topics, including bio-ink formulation and characterization, bioprinter hardware and software design, tissue and organ modeling, image analysis, process optimization, and quality control. Audience The book is aimed at professionals, practitioners and researchers in the fields of bioprinting, tissue engineering, and computational intelligence in medicine.

Algocrazia

Science & Nature

Gli algoritmi e i sistemi di intelligenza artificiale governano già oggi alcune delle nostre attività. In un prossimo futuro potranno arrivare a gestire e senza più alcuna mediazione umana tutte le attività relative alla nostra sfera personale, sociale e politica. Algocrazia descrive in modo accessibile le tecnologie informatiche sottostanti a questa rivoluzione, e discute gli indubbi vantaggi che essa ci sta portando e ci porterà. Vantaggi che dovremo sfruttare fino in fondo perché potenzialmente in grado di rendere le nostre vite più piacevoli e sicure. Allo stesso tempo però il libro evidenzia i potenziali pericoli che possono insorgere dall’abbandonarsi ciecamente a strumenti informatici senza essere in grado di comprenderne il funzionamento e il potenziale impatto. In primis, il pericolo di trasformare le nostre società democratiche in società sotto il governo degli algoritmi: le algocrazie

Le Temps

Science & Nature

À la fois évident et impalpable, substantiel et fuyant, le temps s'impose dans toutes les disciplines sans être l'apanage d'aucune. Avec le talent de vulgarisateur qu'on lui connaît, Étienne Klein nous entraîne du temps de la physique à la philosophie du temps.

Microbial Biotechnology

Science & Nature

A holistic approach covering a wide range of environmental microbial applications along with current and future trends In Microbial Biotechnology: Role in Ecological Sustainability and Research, a team of distinguished researchers delivers an authoritative overview of the role of microbial biotechnology in the pursuit of environmental and ecological sustainability. The book provides readers with compelling presentations of microbial technology, including its applications in the removal of environmental pollutants, and sustainable agriculture using microbial biocontrol agents or bio-fertilizers. Readers will also be able to explore the microbial reduction of greenhouse gases and a wide range of other cutting-edge applications, including the removal of various toxic environmental contaminants, such as antibiotics, pesticides, dyes, and heavy metals. Microbial Biotechnology provides: A thorough introduction to microorganisms, their metabolic engineering, the human microbiome, and other foundational topics An in-depth exploration of environmental management, including bioremediation through a nexus approach A fulsome treatment of current trends in microbial biotechnology and its role in sustainable productionPerfect for professionals in applied microbiology, biotechnology, environmental engineering, green chemistry, and soil science, Microbial Biotechnology: Role in Ecological Sustainability and Research will also earn a place in the libraries of research scholars, scientists, and academicians with an interest in environmental microbiology and ecology.

Advanced Control of Doubly Fed Induction Generator for Wind Power Systems

Science & Nature

Covers the fundamental concepts and advanced modelling techniques of Doubly Fed Induction Generators accompanied by analyses and simulation resultsFilled with illustrations, problems, models, analyses, case studies, selected simulation and experimental results, Advanced Control of Doubly Fed Induction Generator for Wind Power Systems provides the basic concepts for modelling and controlling of Doubly Fed Induction Generator (DFIG) wind power systems and their power converters. It explores both the challenges and concerns of DFIG under a non-ideal grid and introduces the control strategies and effective operations performance options of DFIG under a non-ideal grid. Other topics of this book include thermal analysis of DFIG wind power converters under grid faults; implications of the DFIG test bench; advanced control of DFIG under harmonic distorted grid voltage, including multiple-loop and resonant control; modeling of DFIG and GSC under unbalanced grid voltage; the LFRT of DFIG, including the recurring faults ride through of DFIG; and more. In addition, this resource: Explores the challenges and concerns of Doubly Fed Induction Generators (DFIG) under non-ideal grid Discusses basic concepts of DFIG wind power system and vector control schemes of DFIG Introduces control strategies under a non-ideal grid Includes case studies and simulation and experimental results Advanced Control of Doubly Fed Induction Generator for Wind Power Systems is an ideal book for graduate students studying renewable energy and power electronics as well as for research and development engineers working with wind power converters.

Μόνο έξι αριθμοί

Science & Nature

Πώς είναι δυνατόν μέσω ενός μοναδικού «γεγονότος γένεσης» να δημιουργηθούν δισεκατομμύρια γαλαξίες, μαύρες τρύπες, άστρα και πλανήτες; Πώς τα άτομα συναθροίστηκαν σχηματίζοντας —εδώ στη Γη, αλλά πιθανόν και σε άλλους κόσμους— έμβια όντα τόσο πολύπλοκα που να αναρωτιούνται για την προέλευση και το σκοπό της ζωής; Ποιοι είναι οι θεμελιώδεις νόμοι που διέπουν το Σύμπαν μας; Και υπάρχουν άλλα σύμπαντα; Στο παρόν βιβλίο, ο Martin Rees, Βασιλικός Αστρονόμος της Βρετανίας, προσφέρει στο ευρύ κοινό κατανοητές απαντήσεις στα παραπάνω ερωτήματα και παράλληλα μας οδηγεί στην πρώτη γραμμή της έρευνας στη σύγχρονη φυσική. Μας εξηγεί πώς έξι αριθμοί, «εντυπωμένοι» στη Μεγάλη Έκρηξη, μπορούν να προσδιορίζουν τα θεμελιώδη χαρακτηριστικά του φυσικού κόσμου. Και πώς από τις τιμές αυτών των έξι αριθμών εξαρτάται, με εκπληκτική ευαισθησία, η κοσμική εξέλιξη —αν οποιοσδήποτε από τους εν λόγω αριθμούς «είχε ρυθμιστεί» διαφορετικά, δεν θα μπορούσε να υπάρξουν ούτε άστρα ούτε ζωή. Το γεγονός μάς παρέχει τη δυνατότητα να αντιληφθούμε ριζικά νέες προοπτικές για το Σύμπαν και τη δική μας θέση μέσα σ’ αυτό, καθώς και για την υπόσταση των φυσικών νόμων. • «Το βιβλίο αποπνέει το λεπτό άρωμα της μοντέρνας φυσικής και κοσμολογίας, παρότι λόγω του μεγέθους του αδυνατεί να μας φανερώσει όλες τις λεπτομέρειες...» —The New Scientist

If Science is to Save Us

Science & Nature

There has never been a time when ‘following the science’ has been more important for humanity. At no other point in history have we had such advanced knowledge and technology at our fingertips, nor had such astonishing capacity to determine the future of our planet.But the decisions we must make on how science is applied belong outside the lab and should be the outcome of wide public debate. For that to happen, science needs to become part of our common culture. Science is not just for scientists: if it were, it could never save us from the multiple crises we face. For science can save us, if its innovations mesh carefully into society and its applications are channelled for the common good.As Martin Rees argues in this expert and personal analysis of the scientific endeavour on which we all depend, we need to think globally, we need to think rationally and we need to think long-term, empowered by twenty-first-century technology but guided by values that science alone cannot provide.Also available as an audiobook.

Cum sa evitam un dezastru climatic

Science & Nature

ÎN ACEASTĂ CARTE SURPRINZĂTOR DE TRANȘANTĂ ȘI DE CONCENTRATĂ, BILL GATES PREZINTĂ UN PLAN AMPLU, PRACTIC – ȘI ACCESIBIL – PENTRU CUM PUTEM AJUNGE ÎN TIMP UTIL LA ZERO EMISII DE CARBON, CA SĂ EVITĂM O CATASTROFĂ CLIMATICĂ. Bill Gates a petrecut un deceniu investigând cauzele și efectele schimbărilor climatice. Cu ajutorul experților în fizică, chimie, biologie, inginerie, științe politice și finanțe, el s-a concentrat asupra măsurilor necesare pentru a opri cursul planetei noastre către un dezastru ecologic. În paginile acestui volum, nu numai că explică de ce trebuie să facem eforturi pentru a ajunge la emisii nete zero de gaze cu efect de seră, dar vine și cu informații despre ce ar trebui să facem pentru a atinge acest obiectiv extrem de important. Bill Gates ne oferă o descriere clară a provocărilor cu care ne confruntăm. Bazându-se pe înțelegerea sa despre inovație și măsurile necesare pentru a introduce idei noi pe piață, autorul prezintă domeniile în care tehnologia contribuie deja la reducerea emisiilor, unde și cum putem face tehnologiile actuale să funcționeze mai eficient, unde sunt necesare tehnologii inovatoare și cine lucrează la aceste inovații esențiale. În cele din urmă, stabilește un plan concret și practic pentru atingerea obiectivului zero emisii – sugerând nu numai politici pe care guvernele ar trebui să le adopte, dar și ceea ce putem face noi ca indivizi pentru a menține guvernul, angajatorii și pe noi înșine angrenați în această întreprindere crucială. Așa cum arată Bill Gates, reducerea la zero a emisiilor poluante nu va fi simplă sau ușor de realizat, dar, dacă urmăm planul pe care îl stabilește aici, acesta este un obiectiv ferm la îndemâna noastră. „Pentru a opri încălzirea globală și a evita efectele negative ale schimbărilor climatice, oamenii ar trebui să nu mai elibereze gaze cu efect de seră în atmosferă. Pare dificil, și așa va fi. Omenirea nu a mai contribuit niciodată la ceva de o asemenea amploare. Toate țările vor trebui să-și schimbe obiceiurile, deoarece practic toate activitățile ce țin de viața modernă – cum creștem culturile, cum fabricăm diverse lucruri, cum ne deplasăm dintr-un loc într-altul – presupun eliberarea de gaze cu efect de seră. Dacă nu se modifică nimic și lumea va produce în continuare gaze cu efect de seră, schimbările climatice vor fi din ce în ce mai severe, iar impactul asupra oamenilor va fi, cel mai probabil, catastrofal. Dar lucrurile se pot schimba. Avem deja câteva dintre instrumentele necesare – iar în privința celor pe care nu le avem încă, tot ce am învățat despre climă și tehnologie mă face să fiu optimist că le putem inventa, implementa și, dacă acționăm suficient de repede, putem evita o catastrofă climatică. Această carte este despre ce va fi nevoie pentru a face asta și de ce cred eu că putem reuși.“ BILL GATES BILL GATES este tehnolog, important om de afaceri și filantrop. În 1975, a cofondat Microsoft cu prietenul său din copilărie, Paul Allen; astăzi, el și Melinda Gates sunt copreședinți ai Fundației Bill & Melinda Gates. De asemenea, a înființat organizația Breakthrough Energy, în efortul său de a ajuta piața să comercializeze energie curată și alte tehnologii legate de climă. El și Melinda au împreună trei copii.

Biohydrogen - Advances and Processes

Science & Nature

Biohydrogen is the cleanest biofuel. It has the highest energy content by weight and burns cleanly – generating just water. It is the best choice for fuel cells, where it generates electricity directly, in its reaction with oxygen. Biohydrogen appears naturally as part of gases from mammal digestive systems, and it can be produced in specially designed anaerobic biodigesters, or through photocatalysis with microalgae. The gas is also easy to purify and use.As a green hydrogen obtained through bioprocesses, economical biohydrogen production is full of challenges and opportunities: from efficient and fast substrate conversion to storage, transportation, and safe use, there are several aspects that must be developed.Research in this field attacks the challenge of large-scale, efficient production from several directions: substrate pretreatment to enhance digestibility, metabolic networks analysis, and microbial diversity and succession to highlight constraints in production, bioreactor, and downstream design to improve throughput and reduce costs, to cite a few.This volume presents a brief introduction to biohydrogen production, and then explores the recent advances and developments in the area, in twenty four chapters written by specialists on the matter.

Verändere dein Bewusstsein

Science & Nature

Verändere dein Bewusstsein ist die faszinierende Erkundung der neuen Forschung zu Psychedelika wie LSD und Psilocybin, in der die ›neurale Korrellation‹ von mystischer und spiritueller Erfahrung und die Mechanismen von weit verbreiteten mentalen Krankheiten wie Depression, Sucht und Obsessionen untersucht werden. Und ein großartiger Reisebericht von der Geschichte und der Wirkung psychedelischer Substanzen. In den 50er und 60er Jahren wurden psychedelische Substanzen von Psychiatern als Wundermittel betrachtet, mit denen man psychische Erkrankungen beeinflussen und behandeln konnte. Als aber LSD und Psilocybin »aus dem Labor entkamen« und von der Gegenkultur vereinnahmt wurden, lösten sie moralische Panik und einen backlash aus. Das führte Anfang der 70er Jahre dazu, dass Psychedelika verboten wurden und die Forschung eingestellt wurde. Seit zehn Jahren wird dank engagierter Wissenschaftler, Aktivisten und Psychonauten wieder geforscht. Diese Forschung verändert unser Verständnis der Zusammenhänge zwischen dem Gehirn und dem Bewusstsein. Wissenschaftler beginnen, die »neurale Korrelation« von mystischer und spiritueller Erfahrung zu identifizieren und die Mechanismen, die bei so weit verbreiteten mentalen Erkrankungen wie Depressionen, Angstneurosen, Sucht und Obsessionen, aber auch bei ganz gewöhnlichem Unglücklichsein wirksam sind, besser zu verstehen. Michael Pollan erkundet diese aufregende Thematik auf zwei sich überkreuzenden Wegen, zum einen journalistisch und historisch, zum anderen persönlich. Durch das Vertiefen in wissenschaftliche Erkenntnis und in die Erfahrung veränderter Zustände des Bewusstseins gelingt es ihm, unser Verständnis von Geist und Selbst und unserem Platz in der Welt neu auszuloten.

Ascensão e queda dos dinossauros

Science & Nature

Se hoje usamos a coroa que um dia pertenceu aos dinossauros, pode acontecer conosco o que aconteceu com eles? Há 66 milhões de anos, os dinossauros, as criaturas mais temidas da Terra, pereceram. Hoje, seguem como um dos maiores mistérios do nosso planeta. Este livro revela, como nunca antes, uma extraordinária saga de 200 milhões de anos. Baseando-se nas mais recentes descobertas científicas, Steve Brusatte, um jovem paleontólogo norte-americano que desponta como destaque na área, reconstitui esse mundo perdido e esclarece as origens enigmáticas, a evolução espetacular, a diversidade impressionante, a extinção cataclísmica e o legado duradouro dessas criaturas.

Euclid's Window

Science & Nature

Through Euclid's Window Leonard Mlodinow brilliantly and delightfully leads us on a journey through five revolutions in geometry, from the Greek concept of parallel lines to the latest notions of hyperspace. Here is an altogether new, refreshing, alternative history of math revealing how simple questions anyone might ask about space -- in the living room or in some other galaxy -- have been the hidden engine of the highest achievements in science and technology.Based on Mlodinow's extensive historical research; his studies alongside colleagues such as Richard Feynman and Kip Thorne; and interviews with leading physicists and mathematicians such as Murray Gell-Mann, Edward Witten, and Brian Greene, Euclid's Window is an extraordinary blend of rigorous, authoritative investigation and accessible, good-humored storytelling that makes a stunningly original argument asserting the primacy of geometry. For those who have looked through Euclid's Window, no space, no thing, and no time will ever be quite the same.

Visions

Science & Nature

Visions, physicist Michio Kaku looks to the future and guides the reader through the science of the next century. Based on many years of research into the pioneering efforts by theoreticians, and groundbreaking research that is taking place in laboratories around the world, Kaku leads us into the next century, predicting an even more far-reaching scientific revolution than the one we have at present.

The Long and the Short of It

Science & Nature

We’ve always measured the world around us, from how big things are, to how fast they go, how much they’re worth and practically everything in between. But who decided how we do it, and why? The Long and the Short of It takes us back in time to discover the origins and evolution of a huge variety of different units of measurement. On the way it answers such questions as: Why do we measure time in units of 60? How do you determine the height of a mountain when sea level keeps changing? Why did the length of a mile once depend on where you came from? What’s the width of a horse’s backside got to do with NASA’s booster rockets? Packed with fascinating stories, this is an intriguing guide to the many systems of measurement that make sense of our daily lives, from pounds and parsecs to bushels and barricades.

Fisica dell’Impossibile

Science & Nature

Riusciremo un giorno ad attraversare i muri, costruire astronavi in grado di superare la velocità della luce, leggere nella mente delle altre persone, muovere gli oggetti con la forza del pensiero e spostarci nello spazio e nel tempo? La risposta sembrerebbe scontata, e verrebbe naturale aggiungere che un conto è la scienza e un conto è la fantascienza. Eppure Michio Kaku, abile divulgatore e uomo di scienza, avverte: attenzione a trarre conclusioni affrettate, perché l'impossibile è un concetto relativo. D'altronde un secolo fa nessuno avrebbe scommesso sull'utilizzo dei raggi laser, sulla televisione o sulla capacità dell'uomo di scindere l'atomo e ricavarne energia. Teletrasporto e viaggi nel tempo, telecinesi ed esistenza di civiltà extraterrestri, fino alla possibilità di piegare la luce per nascondere oggetti e persone: Kaku prende spunto dal ricco e affascinante immaginario della fantascienza - Philip Dick e Asimov, letteratura e cinema, Tolkien e "L'uomo invisibile" - per esplorare i concetti fondamentali (e i limiti) delle leggi della fisica come le conosciamo oggi, e dimostrare che magari tra cento anni quelle di Lost potrebbero rivelarsi idee molto meno strampalate di quanto pensiamo ora.

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