2,851 research outputs found
Smart Asset Management for Electric Utilities: Big Data and Future
This paper discusses about future challenges in terms of big data and new
technologies. Utilities have been collecting data in large amounts but they are
hardly utilized because they are huge in amount and also there is uncertainty
associated with it. Condition monitoring of assets collects large amounts of
data during daily operations. The question arises "How to extract information
from large chunk of data?" The concept of "rich data and poor information" is
being challenged by big data analytics with advent of machine learning
techniques. Along with technological advancements like Internet of Things
(IoT), big data analytics will play an important role for electric utilities.
In this paper, challenges are answered by pathways and guidelines to make the
current asset management practices smarter for the future.Comment: 13 pages, 3 figures, Proceedings of 12th World Congress on
Engineering Asset Management (WCEAM) 201
Multiplicity Dependence of Non-extensive Parameters for Strange and Multi-Strange Particles in Proton-Proton Collisions at TeV at the LHC
The transverse momentum () spectra in proton-proton collisions at
= 7 TeV, measured by the ALICE experiment at the LHC are analyzed
with a thermodynamically consistent Tsallis distribution. The information about
the freeze-out surface in terms of freeze-out volume, temperature and the
non-extenisivity parameter, , for , ,
and are extracted by
fitting the spectra with Tsallis distribution function. The
freeze-out parameters of these particles are studied as a function of charged
particle multiplicity density (). In addition, we also study
these parameters as a function of particle mass to see any possible mass
ordering. The strange and multi-strange particles show mass ordering in volume,
temperature, non-extensive parameter and also a strong dependence on
multiplicity classes. It is observed that with increase in particle
multiplicity, the non-extensivity parameter, decreases, which indicates the
tendency of the produced system towards thermodynamic equilibration. The
increase in strange particle multiplicity is observed to be due to the increase
of temperature and not to the size of the freeze-out volume.Comment: Version similar to the published version in EPJ
Transverse Momentum Spectra and Nuclear Modification Factor using Boltzmann Transport Equation with Flow in Pb+Pb collisions at = 2.76 TeV
In the continuation of our previous work, the transverse momentum ()
spectra and nuclear modification factor () are derived using relaxation
time approximation of Boltzmann Transport Equation (BTE). The initial
-distribution used to describe collisions has been studied with the
pQCD inspired power-law distribution, the Hagedorn's empirical formula and with
the Tsallis non-extensive statistical distribution. The non-extensive Tsallis
distribution is observed to describe the complete range of the transverse
momentum spectra. The Boltzmann-Gibbs Blast Wave (BGBW) distribution is used as
the equilibrium distribution in the present formalism, to describe the
-distribution and nuclear modification factor in nucleus-nucleus
collisions. The experimental data for Pb+Pb collisions at =
2.76 TeV at the Large Hadron Collider at CERN have been analyzed for pions,
kaons, protons, and . It is observed that the present formalism
while explaining the transverse momentum spectra upto 5 GeV/c, explains the
nuclear modification factor very well upto 8 GeV/c in for all these
particles except for protons. is found to be independent of the degree
of non-extensivity, after 8 GeV/c.Comment: Same as published version in EPJ
IT ENABLED SERVICE INNOVATION: STRATEGIES FOR FIRM PERFORMANCE
This dissertation seeks to understand firm strategies and implications for sustainability and success in the context of IT-enabled service innovations.
The first essay examines how business models evolve to influence the financial sustainability and maturity of health information exchanges (HIE), a new organizational form in the United States healthcare landscape to facilitate electronic health information sharing across multiple stakeholders such as hospitals, doctors, laboratories, and patients. The study focusses on two components of business models of HIEs: the customer value proposition that is manifested through three categories of service offerings (e.g., foundational, vendor driven and advanced), and two revenue model approaches to earn profits (e.g., subscription and transaction-based revenues models). Using an unique archival data set constructed from surveys of HIEs in the US from 2008 to 2010 for empirical analysis; we find that foundational IT enabled service offerings have higher positive influence on operational maturity and financial sustainability, compared to vendor driven or advanced service offerings. Further, findings show subscription-based revenue models are more advantageous for sustainability in early stages, while transaction-based revenue models lead to higher operational maturity in later stages.
The second essay investigates how two dimensions of IT enabled service augmentation, i.e., value added service and customer care, interplay with core services to influence customer satisfaction with cell phone services in base-of-the-pyramid (BOP) markets. Arguing for price- and relational- evaluations, we develop hypotheses for a substitution effect of value added services, and a complementary effect of customer care, on the relationship between core service and customer satisfaction. Specific to the BOP market context, we further proposed a differentiated influence of service augmentation for different categories of providers based on their institutional contexts and investment strategies. We empirically examine and find support for the hypothesized relationships using an archival data set from surveys of over 3,400 cell phone customers across 34 providers in seven South Asian countries.
The two studies contribute to existing literature in exploring the factors associated with firm performance, and derive managerial implications to effectively manage and profit from IT enabled service innovations. Overall, the dissertation has research and practice implications to gain an understanding of the appropriate strategies to increase firm performance in the context of IT enabled service innovations
Radial Flow in Non-Extensive Thermodynamics and Study of Particle Spectra at LHC in the Limit of Small
We expand the Tsallis distribution in a Taylor series of powers of (q-1),
where q is the Tsallis parameter, assuming q is very close to 1. This helps in
studying the degree of deviation of transverse momentum spectra and other
thermodynamic quantities from a thermalized Boltzmann distribution. After
checking thermodynamic consistency, we provide analytical results for the
Tsallis distribution in the presence of collective flow up to the first order
of (q-1). The formulae are compared with the experimental data.Comment: Replaced with Accepted version in Eur. Phys. J.
75As NMR local probe study of magnetism in (Eu1-xKx)Fe2As2
75As NMR measurements were performed as a function of temperature and doping
in (Eu1-xKx)Fe2As2 (x=0,0.38,0.5,0.7) samples. The large Eu2+ moments and their
fluctuations are found to dominate the 75As NMR properties. The 75As nuclei
close to the Eu2+ moments likely have a very short spin-spin relaxation time
(T2) and are wiped out of our measurement window. The 75As nuclei relatively
far from Eu2+ moments are probed in this study. Increasing the Eu content
progressively decreases the signal intensity with no signal found for the
full-Eu sample (x=0). The large 75As NMR linewidth arises from an inhomogeneous
magnetic environment around them. The spin lattice relaxation rate (1/T1) for
x=0.5 and 0.7 samples is nearly independent of temperature above 100K and
results from a coupling to paramagnetic fluctuations of the Eu2+ moments. The
behavior of 1/T1 at lower temperatures has contributions from the
antiferromagnetic fluctuations of the Eu2+ moments as also the fluctuations
intrinsic to the FeAs planes and from superconductivity.Comment: 6 pages, 6 figures (to appear in EPJB
Radial Flow and Differential Freeze-out in Proton-Proton Collisions at TeV at the LHC
We analyse the transverse momentum ()-spectra as a function of
charged-particle multiplicity at midrapidity () for various
identified particles such as , , , ,
, , and + in
proton-proton collisions at = 7 TeV using Boltzmann-Gibbs Blast Wave
(BGBW) model and thermodynamically consistent Tsallis distribution function. We
obtain the multiplicity dependent kinetic freeze-out temperature () and radial flow () of various particles after fitting the -distribution with BGBW model. Here, exhibits mild dependence
on multiplicity class while shows almost independent behaviour. The
information regarding Tsallis temperature and the non-extensivity parameter
() are drawn by fitting the -spectra with Tsallis distribution
function. The extracted parameters of these particles are studied as a function
of charged particle multiplicity density (). In addition to
this, we also study these parameters as a function of particle mass to observe
any possible mass ordering. All the identified hadrons show a mass ordering in
temperature, non-extensive parameter and also a strong dependence on
multiplicity classes, except the lighter particles. It is observed that as the
particle multiplicity increases, the -parameter approaches to
Boltzmann-Gibbs value, hence a conclusion can be drawn that system tends to
thermal equilibrium. The observations are consistent with a differential
freeze-out scenario of the produced particles.Comment: Published versio
Effect of Hagedorn States on Isothermal Compressibility of Hadronic Matter formed in Heavy-Ion Collisions: From NICA to LHC Energies
In this work, we have studied the isothermal compressibility () as
a function of temperature, baryon chemical potential and centre-of-mass energy
() using hadron resonance gas (HRG) and excluded-volume hadron
resonance gas (EV-HRG) models. A mass cut-off dependence of isothermal
compressibility has been studied for a physical resonance gas. Further, we
study the effect of heavier resonances ( 2 GeV) on the isothermal
compressibility by considering the Hagedorn mass spectrum,
. Here, the parameters, and
are extracted after comparing the results of recent lattice QCD
simulations at finite baryonic chemical potential. We find a significant
difference between the results obtained in EV-HRG and HRG models at a higher
temperatures and higher baryochemical potentials. The inclusion of the Hagedorn
mass spectrum in the partition function for hadron gas has a large effect at a
higher temperature. A higher mass cut-off in the Hagedorn mass spectrum takes
the isothermal compressibility to a minimum value, which occurs near the
Hagedorn temperature (). We show explicitly that at the future low energy
accelerator facilities like FAIR (CBM), Darmstadt and NICA, Dubna the created
matter would be incompressible compared to the high energy facilities like RHIC
and LHC.Comment: Same as published pape
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