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Books > Science & Mathematics > Science: general issues > Scientific standards
Das vorliegende Lehrbuch bietet Studierenden der Natur- und
Ingenieurswissenschaften einen ubersichtlichen und anschaulichen
Einstieg in den Umgang mit Messdaten und deren Interpretation unter
Verwendung der Messunsicherheit - fruher oft Fehlerrechnung
genannt. Dabei stehen das Verstandnis und die Vermittlung von
direkt anwendbarem Wissen im Vordergrund. Auf lange mathematische
Herleitungen wird weitgehend verzichtet. Auf Basis einiger
einfacher Grundprinzipien wie der Verteilung der Messwerte oder dem
mathematischen Modell einer Messung fuhrt dieses Buch in zentrale
Themen ein: - das Messen an sich, - die Angabe von Messergebnissen,
- das Konzept der Unsicherheit, - die Auswertung von Messdaten
mittels verschiedener Methoden, - sowie die Bewertung der
erhaltenen Ergebnisse. Alle diese Themen werden anhand vielfaltiger
Beispiele ausfuhrlich dargestellt und die Anwendung der abstrakten
Konzepte anhand konkreter Zahlenbeispiele veranschaulicht. Fragen
zur Selbstkontrolle sowie zur Vertiefung der Inhalte runden jedes
Kapitel ab.
Das Buch beinhaltet die Ergebnisse des dreijahrigen Verbundprojekts
Separator i4.0 des BMBF-Spitzenclusters it's OWL. Gegenstand des
Projekts war die nachhaltige Einbindung von Expertenwissen in die
zukunftsweisende Weiterentwicklung und Optimierung von
Separationsprozessen. Durch die Entwicklung neuartiger
intelligenter Komponenten aus dem Bereich der Sensorik wird es
zukunftig moeglich sein, Separatoren und die zugehoerigen
Prozesszusammenhange zu verstehen und diese oekologisch/oekonomisch
optimal auszulegen und zu betreiben. Hierzu wurde ein
Instrumentarium bestehend aus Methoden und Loesungen erarbeitet,
das daruber hinaus auf analoge Problemstellungen komplexer
maschinenbaulicher Anlagen anwendbar sein wird.
Dieser Band der Reihe Fachwissen Technische Akustik behandelt die
in der Bauakustik meistverbreiteten Messmethoden, vom theoretischen
Hintergrund uber anwendungspraktische Fragestellungen bis hin zu
den nationalen und internationalen Normen. Die Normenreihe der DIN
EN ISO 12354 dient dabei als roter Faden, da sie die messbaren
Groessen der Bauakustik in einen Gesamtzusammenhang bringt.
Ausgehend von den Aufgabenstellungen der bauakustischen Messtechnik
werden die in Frage kommenden Kenngroessen erlautert. Ein
wesentlicher Aspekt ist der Zusammenhang zu den bestehenden
nationalen und internationalen Normen. Schwerpunktmassig werden die
Grundprinzipien der Luft- und Trittschalldammung behandelt.
Beschrieben werden Messverfahren, die im Labor und in Gebauden zum
Einsatz kommen. Dabei wird ausfuhrlich auf die Schalldammung als
Bauteil- bzw. Systemeigenschaft eingegangen. Die aus den
physikalischen Grundlagen ableitbaren Voraussetzungen der
Messverfahren wie z.B. die Anforderungen an die Schallfelder und
die daraus ableitbaren Festlegungen der Messverfahren (z.B.
Position und Anzahl von Lautsprechern und Mikrofonen) werden
eingehend diskutiert. Auf praktische Fragestellungen wie die
Notwendigkeit der Fremdgerauschkorrektur oder den Einfluss der
Koerperschallnachhallzeiten auf die Messergebnisse wird bei den
jeweiligen Messverfahren ebenfalls Bezug genommen. Ein
ausfuhrliches Literatur- und Normenverzeichnis erganzt die
behandelten Themen, so dass eine weiterfuhrende Vertiefung
ermoeglicht wird.
In diesem Band der Reihe Fachwissen Technische Akustik werden
Grundlagen der Abtastung und Quantisierung, digitale Filter sowie
mehrere digitale Signalverarbeitungsmethoden beschrieben:
Echtzeit-Frequenzanalysator, 2-Kanal-FFT-Analysator mit Sweep- oder
Rauschanregung und Maximalfolgenmesstechnik. Anwendungen und
Fehlerquellen der digitalen Messverfahren werden an Beispielen
diskutiert.
Success in scientific and engineering research depends on effective
writing and presentation. The purpose of this guide is to help the
reader achieve that goal. It enables students and researchers to
write and present material to a professional modern standard,
efficiently and painlessly, and with maximum impact. The approach
is not prescriptive. Rather, the emphasis is on a logical approach
to communication, informed by what needs to be achieved, what works
in practice, and what interferes with success. Over 400 examples of
good and bad writing and graphing are presented. Each is from a
published research article and is accompanied by analysis, comment,
and correction where needed. Journal reviewers' critiques of
submitted manuscripts are included to illustrate common pitfalls.
Above all, this is a "how-to" book, comprehensive but concise,
suitable for continuous study or quick reference. Checklists at the
end of each chapter enable the reader to test the readiness of a
dissertation, journal submission, or conference presentation for
assessment or review. Although oriented towards engineering and the
physical and life sciences, it is also relevant to other areas,
including behavioural and clinical sciences and medicine.
Reiner Thiele fuhrt in die polarisationsoptischen Grundlagen der
Sensortechnik ein. Er zeigt dazu, ausgehend von einer
Faraday-Effekt-Applikation zur Messung hoher elektrischer Stroeme,
das Verfahren zum Test optischer und elektronischer
Sensorkomponenten auf. Seine Testergebnisse erlauben die Erkennung
von Schwachstellen im Sensor und fuhren auf Moeglichkeiten zu deren
Kompensation. Daraus resultieren effiziente Methoden zur
Elimination der stoerenden Doppelbrechung in optischen Kopplern.
Reiner Thiele zeigt die Loesung auf, wie die Messung von hohen
elektrischen Stroemen ohne Eingriff in den Messgroessenkreis
gelingt - ein grundsatzliches Problem der elektrischen
Energietechnik. Er schlagt dies durch die Applikation des
Faraday-Effektes zur Polarisations-Ebenen-Drehung linear
polarisierten Lichts in Lichtwellenleitern vor, induziert durch das
den stromfuhrenden elektrischen Leiter umgebende Magnetfeld. Eine
in Transmission arbeitende erfindungsgemasse Schaltungsanordnung
aus optischen und elektronischen Komponenten stellt dabei den
gewunschten linearen Zusammenhang zwischen Messgroesse und Messwert
bei Elimination der stoerenden Doppelbrechung der Lichtwellenleiter
her, die sich ansonsten vermindernd auf die Effizienz des
Faraday-Effektes auswirkt.
Early in my career I was given the task of designing a sub-critical
nuclear reactor facility that was to be used to perform basic
research in the area of reactor physics. We planned to run a series
of experiments to determine fundamental parameters related to the
distribution of neutrons in such s- tems. I felt that it was
extremely important to understand how the design would impact upon
the accuracy of our results and as a result of this - quirement I
developed a design methodology that I subsequently called
prediction analysis. After working with this method for several
years and applying it to a variety of different experiments, I
wrote a book on the subject. Not surprisingly, it was entitled
Prediction Analysis and was p- lished by Van Nostrand in 1967.
Since the book was published over 40 years ago science and
technology have undergone massive changes due to the computer
revolution. Not - ly has available computing power increased by
many orders of magnitude, easily available and easy to use software
has become almost ubiquitous. In the 1960's my emphasis was on the
development of equations, tables and graphs to help researchers
design experiments based upon some we- known mathematical models.
When I reconsider this work in the light of today's world, the
emphasis should shift towards applying current techn- ogy to
facilitate the design process.
La (TM)introduzione delle lauree triennali ha in molti casi
costretto i docenti a ridurre drasticamente il numero di ore di
insegnamento e quindi la (TM)estensione dei programmi dei corsi di
Fisica.
In questo volumetto l'autore si A] proposto di esporre
sinteticamente ma con il massimo rigore possibile il corso di
Fisica Generale I evitando le dimostrazioni delle leggi fisiche, ma
dando la prioritA alle applicazioni di tali leggi e allo
svolgimento di esercizi che in genere viene trascurato in molti
corsi.
Ha cercato pertanto di presentare i fenomeni fisici
sottolineando, dove possibile, la loro presenza nella vita
quotidiana e le loro piA semplici e immediate applicazioni,
consentendo in tal modo agli studenti di vedere la Fisica non piA
come una interminabile serie di formule ma come un nuovo modo di
interpretare e di capire i fenomeni naturali inanimati (del resto
non dobbiamo dimenticare che il termine greco da cui deriva il suo
nome A] fisis, fisis, ovvero natura).
Il contenuto A] completo, comprendendo anche capitoli quali la
meccanica relativa, i fluidi, la termodinamica dei ciclia ] Al
termine di ogni capitolo viene riportato un formulario che riassume
sinteticamente le leggi piA importanti esposte nel capitolo,
premessa questa indispensabile per permettere allo studente la
risoluzione di problemi che segue. Il CD allegato al volume,
presenta una raccolta di problemi molto piA ricca.
Sie mussen einen naturwissenschaftlich-technischen Aufsatz
schreiben und stehen nun vor dem Problem, ihre wenigen Formeln und
Gleichungen korrekt darstellen zu wollen? Sie besitzen bereits
Bucher zum Thema "Schreiben einer wissenschaftlichen Arbeit",
moechten zusatzlich aber erfahren, wie Sie bestimmte Sonderzeichen
erzeugen koennen? Sie kennen sich in der Materie schon ganz gut
aus, moechten aber regelkonform schreiben? Dieses essential liefert
Ihnen Antworten in komprimierter Form. Neben allgemeinen Tipps
erhalten Sie auch solche fur das Arbeiten mit MS Word und daruber
hinaus Informationen zum Umgang mit MS Excel, MS Powerpoint,
OpenOffice und LibreOffice.
This open-access book addresses the following questions: how does
the polarization of a particle, i.e., the angular momentum state in
which it is produced, manifest itself in nature? What are the
concepts and tools needed to perform rigorous measurements
providing complete and unambiguous physical information?
Polarization measurements are important because they reflect the
nature and coupling properties of a particle and provide unique
insights into the underlying fundamental interactions, playing a
central role in the study and understanding of the mechanisms of
particle production. Besides gradually reviewing many fundamental
notions, the book presents several case studies relevant to physics
analyses underway at the LHC, including the lepton-antilepton
decays of vector states (Drell-Yan, Z and W bosons, quarkonia,
etc.). The book also offers a detailed discussion of cascade
decays, where the vector particle is a daughter of another
particle, as well as a survey of typical angular distributions of
particles of any integer or half-integer spin. With a visual
approach to the presentation of the concepts and frequent use of
pedagogical examples, taken from real measurements,
gedankenexperiments, or detailed simulations, the book focuses on
aspects of polarization measurements that are sometimes
underestimated or left unexplored in experimental analyses, such as
the importance of the choice of the reference frame, the existence
of frame-independent relations, and the shapes of the physically
allowed parameter domains. Several examples are provided of
pitfalls introduced when the intrinsic multidimensionality of the
problem is neglected in exchange for a simplified analysis.
Targeting an audience of graduate students, post-docs, and other
researchers involved in analyses of LHC data, this book helps to
establish a solid bridge between high precision data, existing or
soon to be collected, and accurate measurements, including
high-sensitivity tests of the Standard Model.
Written by three leading experts in the field, this textbook
describes and explains all aspects of the scanning probe
microscopy. Emphasis is placed on the experimental design and
procedures required to optimize the performance of the various
methods. Scanning Probe Microscopy covers not only the physical
principles behind scanning probe microscopy but also questions of
instrumental designs, basic features of the different imaging
modes, and recurring artifacts. The intention is to provide a
general textbook for all types of classes that address scanning
probe microscopy. Third year undergraduates and beyond should be
able to use it for self-study or as textbook to accompany a course
on probe microscopy. Furthermore, it will be valuable as reference
book in any scanning probe microscopy laboratory. Novel
applications and the latest important results are also presented,
and the book closes with a look at the future prospects of scanning
probe microscopy, also discussing related techniques in
nanoscience. Ideally suited as an introduction for graduate
students, the book will also serve as a valuable reference for
practising researchers developing and using scanning probe
techniques.
This book brings together two broad themes that have generated a
great deal of interest and excitement in the scientific and
technical community in the last 100 years or so: quantum tunnelling
and nonlinear dynamical systems. It applies these themes to
nanostructured solid state heterostructures operating at room
temperature to gain insight into novel photonic devices, systems
and applications.
This book presents a general framework for modelling power system
devices to develop complete electromechanical models for
synchronous machines, induction machines, and power electronic
devices. It also presents linear system analysis tools that are
specific to power systems and which are not generally taught in
undergraduate linear system courses. Lastly, the book covers the
application of the models, analysis and tools to the design of
automatic voltage controllers and power system stabilisers, both
for single-machine-infinite-bus systems and multi-machine
interconnected systems. In most textbooks modelling, dynamic
analysis, and control are closely linked to the computation methods
used for analysis and design. In contrast, this book separates the
essential principles and the computational methods used for power
system dynamics and control. The clear distinction between
principles and methods makes the potentially daunting task of
designing controllers for power systems much easier to approach. A
rich set of exercises is also included, and represents an integral
part of the book. Students can immediately apply-using any
computational tool or software-the essential principles discussed
here to practical problems, helping them master the essentials.
For a physicist, "noise" is not just about sounds, but refers to
any random physical process that blurs measurements, and in so
doing stands in the way of scientific knowledge. This book deals
with the most common types of noise, their properties, and some of
their unexpected virtues. The text explains the most useful
mathematical concepts related to noise. Finally, the book aims at
making this subject more widely known and to stimulate the interest
for its study in young physicists.
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