January 2008 ISSUE 23
Participate in this project:
As part of
the celebrations regarding the publication of Mie's
famous paper 100 years ago, you might be interested in knowing that I have set
up a Mie Translation Project, with the goal of
translating his papers into as many major languages as possible. The project
webpage is http://www.ugr.es/local/aquiran/mie.htm
Kind
Regards, Arturo Quirantes.
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Meetings
The
International Radiation Symposium IRS2008 will be held at Mabu Thermas
& Resort, at Foz do
http://www.irs2008.org.br/site/index.php.
Please
note that the abstract submission deadline is 20
January 2008.
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Dear
colleagues,
You are
invited to participate the session Cosmic Dust: Its Formation and Evolution in
the planetary science section of Asia Oceania Geosciences
Society 5th Annual Meeting (AOGS 2008) that will be held in
A primary
goal of this session is to find a consensus among experts in the formation and
evolution of cosmic dust: where it comes from and where it goes. All kinds of
cosmic dust such as intergalactic dust, interstellar dust, circumstellar
dust, cometary dust, asteroidal
dust, interplanetary dust, circumplanetary dust,
stellar nebular condensates, presolar grains,
interplanetary dust particles (extraterrestrial stratospheric particles),
micrometeorites (polar ice particles), meteoroids, meteors, and regolith particles are the subject of discussion. The
session will address interrelation between them and perceptions on the dust
alteration through a variety of processing. This includes different methods of
its determination (in-situ and laboratory measurements, astronomical
observations, laboratory and numerical analogue simulations, theoretical
modeling, etc.). However, the session is open for any other aspects of dust
research. We plan to publish a special issue of Earth, Planets and Space
(EPS) devoted to the AOGS dust session(http://www.terrapub.co.jp/journals/EPS/index.html)
Important
Dates in 2008:
January 24
Fee Waiver Application Deadline
January 24
Abstract Submission Deadline
April 22
Reduced Rate Registration Deadline
June 1
Online Registration Deadline
June 16-20
AOGS 2008
Hope to see
you in Busan!
Hiroshi Kimura (
Masateru Ishiguro (
Ludmilla Kolokolova (
Aigen Li (
Keiko Nakamura-Messenger (NASA/Johnson Space Center,
Torsten Poppe (Technische Universität Braunschweig,
Germany)
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New Light-Scattering PhD. Congratulations, Maxim Yurkin!
Yurkin
M.A. "Discrete dipole simulations of light
scattering by blood cells."
http://www.science.uva.nl/research/scs/papers/archive/Yurkin2007c.pdf
Blood is
one of the most important systems of the human organism, and its functionality
is largely determined by blood cells. Optical techniques are naturally
non-invasive and capable of fast cell processing, that is why they are widely
used to study and characterize blood cells, e.g. in flow cytometers.
Elastic light scattering is an optical signal, which generally does not require
sample preprocessing and is determined by overall cell morphology (size, shape,
and internal structure). In this thesis we further develop the discrete
dipole approximation to simulate light scattering by blood cells. Combined with
experimental measurements of light scattering patterns with scanning flow cytometer this allows us to approach the problem of blood
cells characterization. We applied this methodology to two types of blood
cells: red blood cells and granulocytes. We developed characterization method
for the former and studied in details the effect of granules on light
scattering signals for the latter..
==============================================================
New Books
Wozniak, Bogdian,
Dera, Jerzy,“ Light Absorption in Sea Water” Series: Atmospheric
and Oceanographic Sciences Library , Vol. 33 2007, VIII, 452 p.,
Hardcover ISBN: 978-0-387-30753-4
This
book takes a fresh, holistic approach to the problems of light absorption and
absorbers in seawaters, discussing the fundamentals of light absorption at
various depths in seawaters of different trophicity by absorbers of
diverse origin. The authors have drawn their information from a substantial
body of contemporary research results published in the subject literature (over
700 references) as well as their own work during the last 30 years. No other
book presently available examines the issues of light absorption and absorbers
in seawaters in such a manner.The book is intended
primarily for students, engineers and scientists professionally involved with
the marine environment; nevertheless, the authors hope that it will also find
favor among all who take an interest in the nature of our Earth, especially the
seas and oceans. The components most strongly differentiating the various
types of sea/ocean waters from the optical point of view – the water itself,
the organic and inorganic substances dissolved in it, and the manifold
particles suspended in it – receive comprehensive treatment. The spectral
absorption of light by pure water in its various states of matter and by atoms
and ions of sea salt is also given ample coverage. The interaction of light with
various kinds of organic molecules is analyzed in detail, as are the light
absorption spectra of the principal groups of these substances present in the
sea in dissolved form. The physical and chemical properties, as well as the
optical constants, of organic and inorganic suspended particulate matter (SPM),
are discussed in the context of their relationship to the light absorption
properties of SPM. Special emphasis is placed on the role of the phytoplankton
and the pigments it contains which are particularly strong and important
absorbers of visible light in the sea. The authors are professors of physics
with practical experience in the field of marine research going back 35 (BW)
and 45 (JD) years. They are also the authors of a large number of research
papers and several books, e.g., J. Dera, Marine Physics
(Elsevier (The Netherlands) and PWN (Poland)), W. Smekot-Wensierski, B. Wozniak et
al. Absorptionseigenschaften des marinen Phytoplanktons [Absorption
properties of marine phytoplankton] (GKSS-Forschungszentrum Geesthacht GmbH, Germany
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New Code
Discrete
ordinates FORTRAN code for computing Stokes parameters of light reflected and
transmitted by a finite homogeneous slab with a given optical thickness, single
scattering albedo, and phase matrix: SCIAPOL http://www.iup.uni-bremen.de/~alexk/
======================================================
DDA
Matthew Arnold has noted that Euler angles used to define particle orientation
are defined neither in the manual nor in the source code, while there are
clearly a lot of possible notations. This message is to clarify that the notation
used in ADDA is based on the paper: Mishchenko,M.I. "Calculation of the amplitude matrix for a
nonspherical particle in a fixed orientation",Applied
Optics 39(6):1026-1031. http://ao.osa.org/abstract.cfm?id=44481
This corresponds to "zyz-notation", as
described in Wikipedia: http://en.wikipedia.org/wiki/Euler_angle
and to "y-convention", as described in Mathworld:
http://mathworld.wolfram.com/EulerAngles.html
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New Papers
Mitchell,
D. L., Baran, A. J., Arnott,
W. P. ,and C. Schmitt, “Testing and Comparing
the Modified Anomalous Diffraction Approximation”, Journal of Atmospheric
Science, v. 63, 2948-2962, 2006. Read it here
Ulanowski
Z., J. Bailey, P. W. Lucas, J. H. Hough and E. Hirst,
"Alignment of atmospheric mineral dust due to electric field,"
Atmospheric Chemistry and Physics Discussions 7(5) 13203-13241 (2007).
The
article can be accessed and INTERACTIVE COMMENTS submitted at:
http://www.atmos-chem-phys-discuss.net/7/13203/2007/acpd-7-13203-2007.html
Abstract:
Optical polarimetry observations during a Saharan
dust episode show polarized extinction consistent with the presence of
vertically aligned particles in the atmosphere. Modelling
of the extinction together with particle orientation indicates that the
alignment could have been due to an electric field of the
order of 2 kV/m. The likely origin of the field is charging of the dust.
It is concluded that partial alignment may be a common feature of atmospheric
mineral dust layers. The modelling also indicates
that the alignment can significantly alter dust optical depth.