1,213 research outputs found
Multi-label Ferns for Efficient Recognition of Musical Instruments in Recordings
In this paper we introduce multi-label ferns, and apply this technique for
automatic classification of musical instruments in audio recordings. We compare
the performance of our proposed method to a set of binary random ferns, using
jazz recordings as input data. Our main result is obtaining much faster
classification and higher F-score. We also achieve substantial reduction of the
model size
Critical dynamics of phase transition driven by dichotomous Markov noise
An Ising spin system under the critical temperature driven by a dichotomous
Markov noise (magnetic field) with a finite correlation time is studied both
numerically and theoretically. The order parameter exhibits a transition
between two kinds of qualitatively different dynamics, symmetry-restoring and
symmetry-breaking motions, as the noise intensity is changed.
There exist regions called channels where the order parameter stays for a
long time slightly above its critical noise intensity. Developing a
phenomenological analysis of the dynamics, we investigate the distribution of
the passage time through the channels and the power spectrum of the order
parameter evolution. The results based on the phenomenological analysis turn
out to be in quite good agreement with those of the numerical simulation.Comment: 27 pages, 12 figure
Human μ-calpain: Simple isolation from erythrocytes and characterization of autolysis fragments
Heterodimeric μ-calpain, consisting of the large (80 kDa) and the small (30 kDa) subunit, was isolated and purified from human erythrocytes by a highly reproducible four-step purification procedure. Obtained material is more than 95% pure and has a specific activity of 6 - 7 mU/mg. Presence of contaminating proteins could not be detected by HPLC and sequence analysis. During storage at -80 °C the enzyme remains fully activatable by Ca²⁺, although the small subunit is partially processed to a 22 kDa fragment. This novel autolysis product of the small subunit starts with the sequence (60)RILG and is further processed to the known 18 kDa fragment. Active forms and typical transient and stable autolysis products of the large subunit were identified by protein sequencing. In casein-zymograms only the activatable forms 80 kDa+30 kDa, 80 kDa+22 kDa and 80 kDa+18 kDa displayed caseinolysis
Phase Separation Kinetics in a Model with Order-Parameter Dependent Mobility
We present extensive results from 2-dimensional simulations of phase
separation kinetics in a model with order-parameter dependent mobility. We find
that the time-dependent structure factor exhibits dynamical scaling and the
scaling function is numerically indistinguishable from that for the
Cahn-Hilliard (CH) equation, even in the limit where surface diffusion is the
mechanism for domain growth. This supports the view that the scaling form of
the structure factor is "universal" and leads us to question the conventional
wisdom that an accurate representation of the scaled structure factor for the
CH equation can only be obtained from a theory which correctly models bulk
diffusion.Comment: To appear in PRE, figures available on reques
Робочий зошит до конспекту лекцій з дисциплін “Основи побудови мікропроцесорних систем керування”, “Мікропроцесорна техніка”, “Програмні засоби систем керування” для студентів спеціальностей АГ – 8.092501 Автоматизоване управління технологічними процесами; АТ,ME – 8.091401 Системи управління й автоматики; СМ – 8.091501 Комп`ютерні системи та мережі
Дані методичні вказівки призначуються для вивчення апаратних та
програмних засобів мікропроцесорних систем управління (МПС).
У процесі вивчення дисципліни "Мікропроцесорні системи" студенти
вивчають структуру, архітектуру, сигнали та системи команд однокристального
мікроконтролера К1816 ВЕ51.
Розглянуті питання організації паралельного та послідовного вводу-
виводу, оганізація мікропроцесорних контролерів МПК).
Схемні рішення, які приведені у методичних вказівках можуть бути
використані при виконанні курсових і дипломних проектів студентами
спеціальностей "Комп’ютеризовані системи управління і автоматики" (АТ) і
"Автоматизація технологічних процесів гірничих підприємств" (АГ) та
"Комп’ютерні системи та мережі" (СМ)
Phase-ordering of conserved vectorial systems with field-dependent mobility
The dynamics of phase-separation in conserved systems with an O(N) continuous
symmetry is investigated in the presence of an order parameter dependent
mobility M(\phi)=1-a \phi^2. The model is studied analytically in the framework
of the large-N approximation and by numerical simulations of the N=2, N=3 and
N=4 cases in d=2, for both critical and off-critical quenches. We show the
existence of a new universality class for a=1 characterized by a growth law of
the typical length L(t) ~ t^{1/z} with dynamical exponent z=6 as opposed to the
usual value z=4 which is recovered for a<1.Comment: RevTeX, 8 pages, 13 figures, to be published in Phys. Rev.
On the fermionic signature of the lattice monopoles
We consider fermions in the field of static monopole-like configurations in
the Euclidean space-time. In all the cases considered there exists an infinite
number of zero modes, labeled by frequency i\omega. The existence of such modes
is a manifestation of instability of the vacuum in the presence of the
monopoles and massless fermions. In the Minkowski space the corresponding
phenomenon is well known and is a cornerstone of the theory of the magnetic
catalysis. Moreover, the well known zero mode of Jackiw and Rebbi corresponds
to the limiting case, \omega = 0. We provide arguments why the chiral
condensate could be linked to the density of the monopoles in the infrared
cluster. A mechanism which can naturally explain the equivalence of the
critical temperatures for the deconfinement and chiral transitions, is
proposed. We discuss possible implications for the phenomenology of the lattice
monopoles.Comment: 8 pages, RevTeX 4. An extended version, to be published in the
Physical Review
Monopole Clustering and Color Confinement in the Multi-Instanton System
We study color confinement properties of the multi-instanton system, which
seems to carry an essence of the nonperturbative QCD vacuum. Here we assume
that the multi-instanton system is characterized by the infrared suppression of
instantons as for large size . We first
investigate a monopole-clustering appearing in the maximally abelian (MA) gauge
by considering the correspondence between instantons and monopoles. In order to
clarify the infrared monopole properties, we make the ``block-spin''
transformation for monopole currents. The feature of monopole trajectories
changes drastically with the instanton density. At a high instanton density,
there appears one very long and highly complicated monopole loop covering the
entire physical vacuum. Such a global network of long-monopole loops resembles
the lattice QCD result in the MA gauge. Second, we observe that the SU(2)
Wilson loop obeys an area law and the static quark potential is approximately
proportional to the distance between quark and anti-quark in the
multi-instanton system using the SU(2) lattice with a total volume of and a lattice spacing of . We extract the string tension from
the measurements of Wilson loops. With an instanton density
of and a average instanton size of , the
multi-instanton system provides the string tension of about
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