1,994 research outputs found
Constraints on the active tectonics of the Friuli/NW Slovenia area from CGPS measurements and three-dimensional kinematic modeling
We use site velocities from continuous GPS (CGPS) observations and kinematic
modeling to investigate the active tectonics of the Friuli/NW Slovenia area. Data from 42
CGPS stations around the Adriatic indicate an oblique collision, with southern Friuli
moving NNW toward northern Friuli at the relative speed of 1.6 to 2.2 mm/a. We
investigate the active tectonics using 3DMove, a three-dimensional kinematic model tool.
The model consists of one indenter-shaped fault plane that approximates the Adriatic
plate boundary. Using the ‘‘fault-parallel flow’’ deformation algorithm, we move the
hanging wall along the fault plane in the direction indicated by the GPS velocities. The
resulting strain field is used for structural interpretation. We identify a pattern of
coincident strain maxima and high vorticity that correlates well with groups of
hypocenters of major earthquakes (including their aftershocks) and indicates the
orientation of secondary, active faults. The pattern reveals structures both parallel and
perpendicular to the strike of the primary fault. In the eastern sector, which shows more
complex tectonics, these two sets of faults probably form an interacting strike-slip
system
Masuknya Inggris ke Australia dan Dampaknya Bagi Suku Aborigin
Artikel ini memakai metode penelitian kepustakaan. Studi kepustakaan ialah metode pengumpulan data dengan metode mereview buku, dokumen, catatan, serta berbagai macam laporan yang berhubungan dengan permasalahan yang hendak diteliti. Penelitian ini bertujuan untuk mengetahui peristiwa masuknya Inggris ke Australia, serta dampak bagi kelangsungan hidup suku Aborigin. Bangsa Eropa yang pertama kali membuka rute pelayaran ke benua Australia adalah Potugis, yang melakukan pelayaran samudera pada tahun 1511. Pada tahun 1606, Spanyol juga menjadi salah satu bangsa Eropa yang membuka rute pelayaran untuk menemukan benua Australia. Setelah rute pelayaran tersebut terbuka bangsa Eropa lainnya juga mulai melakukan pelayaran untuk menemukan benua Australia. Salah satu bangsa Eropa yang melakukan pelayaran untuk menemukan benua Australia adalah Belanda. Para pendatang tidak mengakui adannya suku-suku pribumi di Australia dan hanya memandang Australia sebagai daerah yang tidak berpenghuni (terra nullius). Sedangkan, bagi suku-suku pribumi terutama bagi suku Aborigin, para pendatang tersebut dianggap sebagai penajah, sebagai ancaman yang mengambil wilayah tersebut. Bagi suku Aborigin wilayah Australia adalah milik mereka, karena mereka telah menempati wilayah tersebut selama ribuan tahun
Comment on "Evidence for the Droplet/Scaling Picture of Spin Glasses"
In a recent letter Moore et al. claim to exhibit evidence for a
non-mean-field behavior of the Ising spin glass. We show that their claim
is insubstantial, and by analyzing in detail the behavior of the
Migdal-Kadanoff approximation (MKA) as compared to the behavior of the
Edwards-Anderson (EA) spin glass we find further evidence of a mean-field like
behavior of the spin glass.Comment: 1 page comment including one postscript figur
Efficient and environmentally friendly microwave-assisted synthesis of catalytically active magnetic metallic Ni nanoparticle
Pure magnetic metallic nickel was synthesized by a simple and fast microwave-assisted method using a monomode microwave reactor. Nickel chloride was employed as metal precursor, while an environmental-friendly mixture of ethylene glycol and ethanol was simultaneously used as solvent and reducing agent. The parameters combination, for the occurrence of the reaction, of the mixture molar fraction, and the metal precursor concentration was developed. The influence of the temperature and the time of the irradiation was investigated. The best performance (71% yield) was achieved at 250 °C in 5 min of microwave irradiation. The phase and the morphology of the metal were analyzed by X-ray diffraction, scanning emission microscopy, and transmission electron microscopy, while the surface area was determined by nitrogen physisorption. The material exhibited a strong magnetic behavior. The metallic nickel showed high catalytic activity for the hydrogenolysis of benzyl phenyl ether, a lignin model compound, in a microwave-assisted environmental-friendly reaction
4D Spin Glasses in Magnetic Field Have a Mean Field like Phase
By using numerical simulations we show that the 4D Edwards Anderson
spin glass in magnetic field undergoes a mean field like phase transition. We
use a dynamical approach: we simulate large lattices (of volume ) and work
out the behavior of the system in limit where both and go to infinity,
but where the limit is taken first. By showing that the dynamic
overlap converges to a value smaller than the static one we exhibit replica
symmetry breaking. The critical exponents are compatible with the ones obtained
by mean field computations.Comment: Physrev format, 5 ps figures include
Screening for novel endogenous inflammatory stimuli using the secreted embryonic alkaline phosphatase NF-κB reporter assay
An immune response can be activated by pathogenic stimuli, as well as endogenous danger signals, triggering the activation of pattern recognition receptors and initiating signalling cascades that lead to inflammation. This method uses THP1-Blue™ cells, a human monocytic cell line which contains an embryonic alkaline phosphatase reporter gene allowing the detection of NF-κBinduced transcriptional activation. We validated this protocol by assessing NF-κB activation after stimulation of toll-like receptor 4 (TLR4) by two different agonists: lipopolysaccharide (LPS), derived from the cell wall of Gram negative bacteria, and tenascin-C, an extracellular matrix protein whose expression is induced upon tissue injury. We then used this protocol to screen for potential new endogenous TLR4 agonists, but this method can also be used as a quick, economical and reliable means to assay the activity of other inflammatory stimuli resulting in TLR-dependent NF-κB activation
The mean field infinite range p=3 spin glass: equilibrium landscape and correlation time scales
We investigate numerically the dynamical behavior of the mean field 3-spin
spin glass model: we study equilibrium dynamics, and compute equilibrium time
scales as a function of the system size V. We find that for increasing volumes
the time scales increase like . We also present an
accurate study of the equilibrium static properties of the system.Comment: 6 pages, 9 figure
Overlap Among States at Different Temperatures in the SK Model
We discuss the issue of temperature chaos in the Sherrington--Kirkpatrick
spin glass mean field model. We numerically compute probability distributions
of the overlap among (equilibrium) configurations at two different values of
the temperature, both in the spin glass phase. The situation on our medium size
systems is clearly non-chaotic, but a weak form of chaos could be emerging on
very large lattices.Comment: 4 pages in aps format including 8 ps figures. Small change
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