Results 61 to 70 of about 17,966 (292)

Part-Products of 1-Free Integer Compositions [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2011
If $\vec{\lambda}$ is a composition of the positive integer $n$, define ${\bf B}(\vec{\lambda})$ to be the product of the parts of $\vec{\lambda}$. We present a modified version of Hitczenko's stopped sequence construction that leads to a proof of the asymptotic lognormality of ${\bf B}$ for random 1-free compositions (compositions containing no parts
openaire   +2 more sources

Part-products of S-restricted integer compositions [PDF]

open access: yesApplicable Analysis and Discrete Mathematics, 2013
If S is a cofinite set of positive integers, an "S-restricted composition of n" is a sequence of elements of S, denoted ?? = (?1, ?2, ... ), whose sum is n. For uniform random S-restricted compositions, the random variable B(??) = ?i ?i is asymptotically lognormal. (A precise statement of the theorem includes an error term to bound the rate
Schmutz, Eric, Shapcott, Caroline
openaire   +2 more sources

Three‐Dimensional Anomalous Hall Sensing Enabled By Spin–Orbit Torque Driven Domain Reconfiguration In Chiral Multilayers

open access: yesAdvanced Functional Materials, EarlyView.
A three‐dimensional magnetic field sensor is realized in chiral W/CoFeB/MgO multilayers, where spin–orbit torques reversibly reconfigure homochiral stripe domains. The symmetry of the torque enables offset‐free in‐plane sensing, while the reproducible domain reconfiguration extends the linear out‐of‐plane range. An anomalous Hall readout delivers large‐
Sabri Koraltan   +16 more
wiley   +1 more source

A Hybrid Approach to QoS-Aware Service Composition [PDF]

open access: yes, 2008
QoS-aware service composition intends to maximize the QoS of a composite service when selecting service providers. This paper proposes a service composition scheme that uses a combination of Integer Programming, case-based reasoning, and, genetic ...
Ye, Xin   +3 more
core   +1 more source

A Dynamic Composition Mechanism of Security Service Chaining Oriented to SDN/NFV-Enabled Networks

open access: yesIEEE Access, 2018
With the large-scale commercial application of data center networks, the security problem of data center network is attracting more and more attention.
Yicen Liu   +3 more
doaj   +1 more source

Summer food of juvenile turbot, Psetta maxima (L.) and flounder, Platichthys flesus (L.), at Świętouść, Pomeranian Bay [PDF]

open access: yesActa Ichthyologica et Piscatoria, 1990
Summer food of 0- and I-age group turbot and flounder utilizing shallow, inshore nursery ground at Świętouść, Pomeranian Bay were examined. Juvenile turbot fed mostly on mysid. Neomysis integer, Pisces and Crangon crangon. Amphipod Bathyporeia pilosa was
I. Kostrzewska-Szlakowska, J. Szlakowski
doaj   +3 more sources

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

open access: yesAdvanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Giant Magnetic Coercivity Driven by Spin‐Bag Ferromagnetism in Epitaxial Sr3YCo4O10+δ Films with Engineered 2D Oxygen Vacancy Ordering

open access: yesAdvanced Functional Materials, EarlyView.
A giant magnetic coercivity and a vertical shift of hysteresis loops are demonstrated in Sr3YCo4O10+δ epitaxial films. The hard magnetic behavior originates from ferromagnetic spin bags stabilized within a long‐range ordered oxygen‐vacancy structure.
Yanbin Chen   +12 more
wiley   +1 more source

Identifying metabolites with integer decomposition techniques, using only their mass spectrometric isotope patterns [PDF]

open access: yes, 2007
Böcker S, Letzel M, Lipták Z, Pervukhin A. Identifying metabolites with integer decomposition techniques, using only their mass spectrometric isotope patterns.
Lipták, Zsuzsanna   +3 more
core   +1 more source

Chromosome structures: reduction of certain problems with unequal gene content and gene paralogs to integer linear programming

open access: yesBMC Bioinformatics, 2017
Background Chromosome structure is a very limited model of the genome including the information about its chromosomes such as their linear or circular organization, the order of genes on them, and the DNA strand encoding a gene.
Vassily Lyubetsky   +2 more
doaj   +1 more source

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