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X-ray crystallography provides us with the most accurate picture we
can get of atomic and molecular structures in crystals. It provides
a hard bedrock of structural results in chemistry and in
mineralogy. In biology, where the structures are not fully
crystalline, it can still provide valuable results and, indeed, the
impact here has been revolutionary. It is still an immense field
for young workers, and no doubt will provide yet more striking
developments of a major character. It does, however, require a wide
range of intellectual application, and a considerable ability in
many fields. This book will provide much help. It is a very
straightforward and thorough guide to every aspect of the subject.
The authors are ex perienced both as research workers and as
teachers of standing, and this is shown in their clarity of
exposition. There are plenty of illustrations and worked examples
to aid the student to obtain a real grasp of the subject. The
practical side is encouraged by the very clarity of the theory."
Crystallography may be described as the science of the structure of
materi als, using this word in its widest sense, and its
ramifications are apparent over a broad front of current scientific
endeavor. It is not surprising, therefore, to find that most
universities offer some aspects of crystallography in their
undergraduate courses in the physical sciences. It is the principal
aim of this book to present an introduction to structure
determination by X-ray crystal lography that is appropriate mainly
to both final-year undergraduate studies in crystallography,
chemistry, and chemical physics, and introductory post graduate
work in this area of crystallography. We believe that the book will
be of interest in other disciplines, such as physics, metallurgy,
biochemistry, and geology, where crystallography has an important
part to play. In the space of one book, it is not possible either
to cover all aspects of crystallography or to treat all the subject
matter completely rigorously. In particular, certain mathematical
results are assumed in order that their applications may be
discussed. At the end of each chapter, a short bibliog raphy is
given, which may be used to extend the scope of the treatment given
here. In addition, reference is made in the text to specific
sources of information. We have chosen not to discuss experimental
methods extensively, as we consider that this aspect of
crystallography is best learned through practical experience, but
an attempt has been made to simulate the interpretive side of
experimental crystallography in both examples and exercises."
This survey of the important types of inorganic and organic crystal
structures treats its subject thoroughly and in sufficient depth
for undergraduate modules in chemistry courses. Features of this
book are the instructions for 3D stereoviewing which is central to
a full appreciation of the presentation. Clear directions for
making your own stereo have been provided in the book, which
enables readers to examine the plentiful stereo of lattices and
crystal structures which are illustrated.
The introductory chapter explains point-group and space-group
symmetry insofar as required to understand lattices and crystal
structures. Crystal structures are sub-divided according to the
atomic force mainly responsible for cohesion in the solid state,
The descriptions of the structures are gi in crystallographic
terms, including data on the space group, molecular symmetry and
molecular geometry. Discussions of bonding theory for each
sub-division of the structures enhance and strengthen the author s
presentation.
The book stems from the author s successful lecture courses, tested
and refined in class teaching. It draws as necessary on equilibrium
thermodynamics and other chemical topics, with avoidance of
advanced mathematics, A level being the prerequisite.
Examines the important types of inorganic and organic crystal
structuresIncludes instructions for making simple stereoviewers and
computer programsDraws, as necessary, on equilibrium thermodynamics
and other chemical topics, with avoidance of advanced mathematics"
How the 2016 news media environment allowed Trump to win the
presidency The 2016 presidential election campaign might have
seemed to be all about one man. He certainly did everything
possible to reinforce that impression. But to an unprecedented
degree the campaign also was about the news media and its
relationships with the man who won and the woman he defeated. Words
that Matter assesses how the news media covered the extraordinary
2016 election and, more important, what information-true, false, or
somewhere in between-actually helped voters make up their minds.
Using journalists' real-time tweets and published news coverage of
campaign events, along with Gallup polling data measuring how
voters perceived that reporting, the book traces the flow of
information from candidates and their campaigns to journalists and
to the public. The evidence uncovered shows how Donald Trump's
victory, and Hillary Clinton's loss, resulted in large part from
how the news media responded to these two unique candidates. Both
candidates were unusual in their own ways, and thus presented a
long list of possible issues for the media to focus on. Which of
these many topics got communicated to voters made a big difference
outcome. What people heard about these two candidates during the
campaign was quite different. Coverage of Trump was scattered among
many different issues, and while many of those issues were
negative, no single negative narrative came to dominate the
coverage of the man who would be elected the 45th president of the
United States. Clinton, by contrast, faced an almost unrelenting
news media focus on one negative issue-her alleged misuse of
e-mails-that captured public attention in a way that the more
numerous questions about Trump did not. Some news media coverage of
the campaign was insightful and helpful to voters who really wanted
serious information to help them make the most important decision a
democracy offers. But this book also demonstrates how the modern
media environment can exacerbate the kind of pack journalism that
leads some issues to dominate the news while others of equal or
greater importance get almost no attention, making it hard for
voters to make informed choices.
As recently as the early 1970s, the news media was one of the
most respected institutions in the United States. Yet by the 1990s,
this trust had all but evaporated. Why has confidence in the press
declined so dramatically over the past 40 years? And has this
change shaped the public's political behavior? This book examines
waning public trust in the institutional news media within the
context of the American political system and looks at how this lack
of confidence has altered the ways people acquire political
information and form electoral preferences.
Jonathan Ladd argues that in the 1950s, '60s, and early '70s,
competition in American party politics and the media industry
reached historic lows. When competition later intensified in both
of these realms, the public's distrust of the institutional media
grew, leading the public to resist the mainstream press's
information about policy outcomes and turn toward alternative
partisan media outlets. As a result, public beliefs and voting
behavior are now increasingly shaped by partisan predispositions.
Ladd contends that it is not realistic or desirable to suppress
party and media competition to the levels of the mid-twentieth
century; rather, in the contemporary media environment, new ways to
augment the public's knowledgeability and responsiveness must be
explored.
Drawing on historical evidence, experiments, and public opinion
surveys, this book shows that in a world of endless news sources,
citizens' trust in institutional media is more important than ever
before.
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Wild Union (Paperback)
A M Ladd; Edited by Noelle S LeBlanc; Cover design or artwork by Shaun Cochran & Hannah Thigpen
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R651
Discovery Miles 6 510
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Ships in 10 - 15 working days
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1 Nephi is written chiastically, with 16 of the 22 chapters
containing near chapter-wide chiasmi. Until now, these large
parallel structures have not been documented. However, by their
study we gain a deeper connection to Nephi the ancient prophet, and
new insight into his gospel thinking, in particular the Atonement.
The heart of Nephi's composition is his account of his vision of
the tree of life, which features many inspiring parallels. For
instance, there are two usages of condescension, one which speaks
of Christ's birth to a fair virgin, and the other which tells of
Christ's baptism. The question arises, how are these parallel?
Nephi's vision at the center of his book also extends into chapters
12-14. These three chapters form a large chiasmus, and narrow to
center on the restoration. The precise center of chapters 11's
chiasmus and chapters 12-14's share the common thought - that He
spake unto me. This is the hinge of Nephi's message, which is that
God desires to commune with man, whether by angel, personal
visitation, or the still small voice of the Spirit. This book also
explores in depth the story of Nephi and Laban. Answering such
questions as, what does Laban mean in Hebrew, and why is that
important? As well, this book identifies prophetic pattern found in
the stories of Jonah, Elijah, Joseph in Egypt, Moses, and Stephen,
and examines how Nephi uses these same patterns in his writing.
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