1,176 research outputs found
Katalog der Musikbibliothek Peters ...
No full textClassified, with author indexes.Preface signed: C.F. Peters. Dr. Emil Vogel, bibliothekar.Abth. 1. Theoretische Werke.--Abth. 2. Praktische Werke.Mode of access: Internet
Businesses on the 800 block of the east side of 3rd Ave. from Marion St. to Columbia St., ca. 1901-1903
No full textIncludes: First M.E. Church, C.F. Stolting Wallpaper/Painting, and J. Kenney Boot & Shoe Repair. An Actor's Relief poster is in window of otherwise unidentified business.
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Factors affecting the rotational use of insecticides for the management of resistance in mosquitoes
No full textThe
rotation
of
the
use
of
chemically
unrelated
insecticides
has
been
advocated
to
delay
the
build
up
of
resistance.
To
examine
this
concept
in
the
laboratory,
Anopheles
albimanus
and
Culex
guinquefasciatus
were
subjected
to
two
kinds
of
rotational
selection
which
may
be
referred
to
as
short
term
pre-planned
rotation
and
"opportunistic"
rotation.
No
difference
was
observed
between
these
two
methods
in
term
of
the
time
for
each
resistance
level
to
reach
5Q%.
The
effectiveness
of
selection
for
resistance
depends
on
the
protection
conferred
by
resistance
genes
and
this
was
tested
by
laboratory
releases
of
the
DDT
resistant
and
susceptible
homozygotes
and
heterozygotes
of
An.
gambiae
into
DDT
sprayed
and
unsprayed
miniature
huts.
All
the
genotypes
were
killed
with
freshly
applied
DDT
but
survivors
were
observed
from
month
2,
3
and
5
onwards
for
RR,
RS
and
SS
genotypes,
respectively.
Persistence
of
DDT
on
the
sprayed
wall
and
roof
of
the
mud
hut
was
studied
by
bioassays
and
biochemical
assays
on
scrapings
from
the
wall
and
roof.
Linkage
between
resistance
genes
could
effect
the
rotational
use
of
insecticides.
No
linkage
was
found
between
propoxur
and
dieldrin
resistance
genes
by
combining
bioassay
and
biochemical
methods.
As
a
preparation
for
a
field
studies
in
Malaysian
field
collected
Aedes
aegypti
and
Culex
guinguefasciatus
larvae
were
selected
with
temephos
and
Bti.
Cx
guinguefasciatus
responded
to
temephos
selection
but
Ae.
aegypti
did
not
respond
to
temephos
and
neither
species
responded
to
Bti
selection.
~
Caged
adults
were
exposed
to
thermal
fogging
in
the
field.
The
partially
resistant
Cx
guinguefasciatus
strain
hardly
survived
any
better
than
susceptible
strains.
Resistant
and
susceptible
larvae
were
exposed
to
water
samples
from
containers
which
had
been
treated
with
temephos
sand
granules.
100%
mortality
was
obtained
for
all
the
strains
up
to
week
6.
Resistant
Culex
started
to
survive
at
week
7
but
susceptibles
did
not
do
so
until
week
ten.
The
prospects
for
the
various
proposed
strategies
for
resistance
management
are
discussed
Motion of quantum vortex lines near realistic rough boundaries
No full textWe numerically solve the three--dimensional, time--dependent Gross--Pitaevskii equation to model a superfluid flowing over a realistic rough boundary. Our model for the boundary is based on the atom--force microscope image of a NbTi vibrating wire used to generate turbulence in actual experiments. We find that near the boundary a dense region of quantum vortices is created, which forms a kind of `superfluid boundary layer'
Wave excitations in adjacent vortex filaments
No full textThe interactions of the nearest neighbour vortices are argued to play a significant role in the crossover range of scales that lies between the Kolmogorov-Richardson cascade and the Kelvin wave driven cascade in superfluid turbulence. In this work, we study how a wave excitation (a Kelvin wave or a soliton) on a vortex affects a nearby straight vortex. Our numerical simulations reveal that coherent excitations can hop from one vortex filament to another whilst retaining their coherent properties
Spectral properties of Andreev reflection from quantum turbulence in 3He-B: What do they tell about turbulent fluctuations?
No full textOne of the experimental techniques developed to measure quantum turbulence at low temperatures in 3He-B utilizes the Andreev reflection of thermal quasiparticle excitations from quantized vortices and vortex structures. We present the results of theoretical, numerical, and experimental study of Andreev scattering from quantum turbulence in 3He-B. We analyze the spectral properties of the Andreev reflection and compare these with the spectral properties of superfluid turbulence, and discuss the physical mechanisms responsible for the scaling of spectral densities. Finally, we discuss the relation between our findings and related observables in ordinary turbulence
Effects of sublethal doses of pyrethroids on malaria vectors
No full textPyrethroids are currently the most widespread class of insecticide in public health use,
although their future may be limited by resistance. The present study investigates the
effects of these compounds on mosquitoes, other than mortality immediately after
exposure.
Longevity of both male and female An. gambiae was found to be significantly
curtailed following sublethal exposure to the most commonly used pyrethroids,
permethrin, deltamethrin and lambda-cyhalothrin. There was no direct effect observed on
fecundity. Irritancy on direct contact with all 3 compounds was recorded, particularly
with permethrin. Evening host-seeking flight activity was greatly reduced, and when
females were treated with permethrin before release into a flight chamber, significantly
fewer flew to a host to feed.
Experiments investigating Plasmodium yoelii and P. falciparum development in the
Asian vector An. stephensi revealed that sublethal exposure to pyrethroids inhibited
development of oocysts in the midgut. Similar experiments using organochlorine,
organophosphate and carbamate insecticides found no effect.
Radio-labeled permethrin was traced inside the blood meal following exposure.
However, none of the 3 pyrethroids were found to have a direct anti-malarial activity on
cultured gametocytes. Likewise, permethrin did not affect exflagellation of P. yoelii.
Time course experiments determined that for the reduction in oocysts there was a critical
period of between 18 and 48 hours after the infective feed. Permethrin was not found to
inhibit trypsin activity in assays, and the levels of trypsin in the midgut of blood fed
treated and untreated females was not found to differ in a manner which could explain
reduced infection rates.
It is clear that sublethal exposure of mosquitoes can lead to a wide range of
potentially important effects in terms of the impact of pyrethroids in malaria vector control
A Fuzzy-based Scoring Rule for Author Ranking: an alternative to h-index
No full textThe measurement of the quality of research has reached nowadays an increasing interest not only for scientific reasons but also for the critical problem of researchers' ranking, due to the lack of grant assignments. The most commonly used approach is based on the so-called h-index, even if the current literature debated a lot about its pros and cons. This paper, after a brief review of the h-index and of alternative models, focuses on the characterization and the implementation of a modified scoring rule approach by means of a fuzzy inference system a là Sugeno
Measuring public-health outcomes of release of transgenic mosquitoes
No full textThe transgenic RIDL method could ensure that male mosquitos can be released without biting females and that the males would have no female progeny after mating to wild females. Urban Anopheles or Aedes vector populations, surrounded by different species in rural areas, would seem to be the most appropriate targets for such releases, aiming at eradication. In urban areas intensity of transmission is generally not very high and the public-health outcomes of such urban programmes could be monitored by passive surveillance through health facilities or by active surveillance for infections with or without associated symptoms. The alternative use of transgenic mosquitos would be to produce strains refractory to infection by pathogens such as Plasmodium and to drive such genes into wild populations. In theory, in contrast to sterile-male eradication, such a procedure could "resist" a limited level of immigration and could open up the possibility of using the method against African rural malaria. However, in practice it would seem extremely difficult or impossible to ensure the necessary complete linkage of the refractoriness genes to the driving system. If this problem could be overcome one could monitor the impact of the spreading of the refractoriness genes by its impact on (i) the sporozoite rate in the wild population; (ii) the incidence of re-infection after clearing existing infections with an appropriate drug treatment; (iii) active surveillance for prevalence of malaria fever and anaemia in children; (iv) attacks of severe malaria and deaths monitored though hospitals and village reporters
Models to investigate some issues regarding the feasibility of driving refractoriness genes into mosquito vector populations
No full textA genetic driving system extremely closely genetically linked to a refractoriness gene is needed if such genes are to be of any use in the control of vector-borne disease. Wolbachia cytoplasmic symbionts and/or appropriate factors from Wolbachia incorporated into the mosquito genome may be usable as driving factors. Maximal fitness of refractoriness factors is needed, otherwise any genetic recombination between the refractoriness factor and the driver can be shown, by simple models, to lead ultimately to fixation of the driver no longer linked to the refractoriness factor. Models can also show the serious impact of non-isolation of the target wild population and incompleteness of the refractoriness
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