1,238 research outputs found
Murine spleen contains a diversity of myeloid and dendritic cells distinct in antigen presenting function
The spleen contains multiple subsets of myeloid and dendritic cells (DC). DC are important antigen presenting cells (APC) which induce and
control the adaptive immune response. They are cells specialized for antigen capture, processing and presentation to naıve T cells. However,
DC are a heterogeneous population and each subset differs subtly in phenotype, function and location. Similarly, myeloid cell subsets can be
distinguished which can also play an important role in the regulation of immunity. This review aims to characterize splenic subsets of DC and
myeloid cells to better understand their individual roles in the immune response.NHMRC (National Health and Medical Research Council of Australia
Comparative Study Between Power Teaching and Ctl in Increasing Students\u27 Speaking Ability
Tujuan dari penelitian ini adalah untuk mengetahui apakah ada perbedaan yang signifikan dalam pencapaian berbicara siswa yang diajar dengan menggunakan Power Teaching dan CTL. Penelitian ini dilakukan di kelas XI SMAN 10 Bandar Lampung. Hasil pre-test di kelas Power Teaching adalah 65,47, sedangkan di kelas CTL adalah 66,52. Hasil post-test di kelas Power Teaching adalah 76,88, sedangkan di kelas CTL adalah 71,45. Ini berarti bahwa ada perbedaan yang signifikan setelah kedua metode diberikan. Total nilai dalam semua aspek berbicara di kelas Power Teaching adalah 402,5 poin, sedangkan di kelas CTL adalah 129. Ada perbedaan yang signifikan di semua aspek berbicara antara metode Power Teaching dan metode CTL. Ada perbedaan yang signifikan dalam pencapaian berbicara siswa antara siswa yang diajar melalui Power Teaching dan mereka diajarkan melalui CTL. The objectives of this research were to find out whether there is significant differences in students\u27 speaking achievement who are taught by using Power Teaching and CTL and to find out whether there is aspect of two techniques mostly affect. The research was conducted at the eleventh grade of SMAN 10 Bandar Lampung. The result of pre-test in Power Teaching class was 65.47, while in CTL class was 66.52. The result of post-test in Power Teaching class was 76.88, while in CTL class was 71.45. It means that there was significant difference after treatments were given. The total gain in all aspects of speaking of Power Teaching was 402.5 points, while in CTL was 129. It means that there was significant difference in all aspects of speaking between Power Teaching and CTL method. There was a significant difference of students\u27 speaking achievement between the students who were taught through Power Teaching and those taught through CTL
Advancing Science with VGI: Reproducibility and Replicability of Recent Studies using VGI
In scientific research, reproducibility and replicability are requirements to ensure the advancement of our
body of knowledge.
T
his holds true also for VGI
-
related research and studies. However, the
characteristics
of VGI suggest particular difficulties in
ensuring
reproducibility and replicability
. In this
paper,
we aim to examine the current situation in VGI
-
related research
,
and identify strategies to ensure
realization of its full potential. To do so, we first
investigate
the different aspects of reprod
ucibility and
replicability
and their impact on
VGI
-
related research
. These impacts are different depending on the
objectives
of the study. Therefore
, we examine the
study
focus of VGI
-
related research to assess the
current body of research
and structure o
ur assessment
. Th
is work is
based
on a rigorous review of the
elements of reproducibility and a systematic mapping and analysis
of
58
papers on the use of VGI in the
crisis management field. Results of our investigation show that reproducibility issues related to data are
a
serious
concern
, while reproducibility issues related to analysis methods and processes face fewer
challenges. Howe
ver, since most studies still focus on
analyzing
the source data, reproducibility and
replicability are
still an unsolved problem
in VGI
-
related research. Therefore, we
show initiative
s
tackling
the problem, and
finally formulate strategies to improve the
situatio
Measurement of the infrared transmission through a single doped GaAs quantum well in an external magnetic field: Evidence for polaron effects
Precise absolute far-infra-red magneto-transmission experiments have been
performed in magnetic fields up to 33 T on a series of single GaAs quantum
wells doped at different levels. The transmission spectra have been simulated
with a multilayer dielectric model. The imaginary part of the optical response
function which reveals new singular features related to the electron-phonon
interactions has been extracted. In addition to the expected polaronic effects
due to the longitudinal optical (LO) phonon of GaAs, a new kind of carrier
concentration dependent interaction with interface phonons is observed. A
simple physical model is used to try to quantify these interactions and explore
their origin.Comment: 4 pages, 2 Figure
Mesoscopic spin confinement during acoustically induced transport
Long coherence lifetimes of electron spins transported using moving potential
dots are shown to result from the mesoscopic confinement of the spin vector.
The confinement dimensions required for spin control are governed by the
characteristic spin-orbit length of the electron spins, which must be larger
than the dimensions of the dot potential. We show that the coherence lifetime
of the electron spins is independent of the local carrier densities within each
potential dot and that the precession frequency, which is determined by the
Dresselhaus contribution to the spin-orbit coupling, can be modified by varying
the sample dimensions resulting in predictable changes in the spin-orbit length
and, consequently, in the spin coherence lifetime.Comment: 10 pages, 2 figure
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