1,582 research outputs found
An Experiment to Evaluate Skylab Earth Resources Sensors for Detection of the Gulf Stream
The author has identified the following significant results. An experiment to evaluate the Skylab earth resources package for observing ocean currents was performed in the Straits of Florida in January 1974. Data from the S190 photographic facility, S191 spectroradiometer and S192 multispectral scanner, were compared with surface observations. The anticyclonic edge of the Gulf Stream could be identified in the Skylab S190A and B photographs, but the cyclonic edge was obscured by clouds. The aircraft photographs were judged not useful for spectral analysis because vignetting caused the blue/green ratios to be dependent on the position in the photograph. The spectral measurement technique could not identify the anticyclonic front, but mass of Florida Bay water which was in the process of flowing into the Straits could be identified and classified. Monte Carlo simulations of the visible spectrum showed that the aerosol concentration could be estimated and a correction technique was devised
ABO and Rh Blood Group Distribution Among Kunbis (Maratha) population of Amravati District, Maharashtra
The present study reports the distribution of ABO and Rh blood groups among the Kunbis (Maratha) population of Amravati district. The phenotypic frequency of blood group B is observed highest (33.06) percent, O (31.04), A (27.02) and AB is lowest (08.33) percent. The phenotypic frequency of Rh negative is (04.26) percent. TheKunbis (Maratha) population shows close genetic relationship with the Gujratis
Monopole Percolation in pure gauge compact QED
The role of monopoles in quenched compact QED has been studied by measuring
the cluster susceptibility and the order parameter previously
introduced by Hands and Wensley in the study of the percolation transition
observed in non-compact QED. A correlation between these parameters and the
energy (action) at the phase transition has been observed. We conclude that the
order parameter is a sensitive probe for studying the phase
transition of pure gauge compact QED.Comment: LaTeX file + 4 PS figures, 12 pag., Pre-UAB-FT-308 ILL-(TH)-94-1
Quantum reverse-engineering and reference frame alignment without non-local correlations
Estimation of unknown qubit elementary gates and alignment of reference
frames are formally the same problem. Using quantum states made out of
qubits, we show that the theoretical precision limit for both problems, which
behaves as , can be asymptotically attained with a covariant protocol
that exploits the quantum correlation of internal degrees of freedom instead of
the more fragile entanglement between distant parties. This cuts by half the
number of qubits needed to achieve the precision of the dense covariant coding
protocol
Factors Influencing the Adoption of Electronic Health Records in the Australian Environment
With the widespread use of medical records and the subsequent rise in the use of electronic health records (EHRs), the success of their adoption has become an important consideration for health agencies. In the current digital environment, the adoption of EHR has become significant because it limits the use of paper trails, and the care may be more effective because it is based on the electronic transfer of patient information. However, an improvement in the quality of the healthcare service is dependent upon how well EHRs are managed in healthcare as many stakeholders will contribute to them. While the advantages of EHRs are significant and cannot be disputed, a number of concerns have been raised regarding their success, as well as the ways in which they are adopted. The diversity of factors that affect the adoption of EHRs in various contexts requires a comprehensive investigation in order to establish a precise knowledge of their adoption in various healthcare settings. Such identification will help to mitigate many issues in their organisation at policy, workflow efficiency adoption and management levels. In this study, various factors that affect the adoption of EHRs in Australia will be identified and explored so as to arrive at a conceptual model that can be empirically tested later. Considering the vast amount of resources being dedicated to the adoption of EHRs in Australia, identifying barriers to their adoption, especially on an organisational level is essential for its success. Many studies have been conducted to understand barriers to the adoption of EHRs in Australia; however, there have been few studies concentrating on an organisational level in order to explore the challenges and obstacles that face specific organisations
The Phases and Triviality of Scalar Quantum Electrodynamics
The phase diagram and critical behavior of scalar quantum electrodynamics are
investigated using lattice gauge theory techniques. The lattice action fixes
the length of the scalar (``Higgs'') field and treats the gauge field as
non-compact. The phase diagram is two dimensional. No fine tuning or
extrapolations are needed to study the theory's critical behovior. Two lines of
second order phase transitions are discovered and the scaling laws for each are
studied by finite size scaling methods on lattices ranging from through
. One line corresponds to monopole percolation and the other to a
transition between a ``Higgs'' and a ``Coulomb'' phase, labelled by divergent
specific heats. The lines of transitions cross in the interior of the phase
diagram and appear to be unrelated. The monopole percolation transition has
critical indices which are compatible with ordinary four dimensional
percolation uneffected by interactions. Finite size scaling and histogram
methods reveal that the specific heats on the ``Higgs-Coulomb'' transition line
are well-fit by the hypothesis that scalar quantum electrodynamics is
logarithmically trivial. The logarithms are measured in both finite size
scaling of the specific heat peaks as a function of volume as well as in the
coupling constant dependence of the specific heats measured on fixed but large
lattices. The theory is seen to be qualitatively similar to .
The standard CRAY random number generator RANF proved to be inadequateComment: 25pages,26figures;revtex;ILL-(TH)-94-#12; only hardcopy of figures
availabl
Conceptual framework for telehealth adoption in Indian healthcare
India is a developing country with a large landmass and a huge socio-culturally, economically and, ethnically diverse population. The healthcare system for such a diverse and complex country could entail challenges and difficulties in execution and outreach. Here, the emerging area of Telehealth could afford a place for itself in providing healthcare and health education to a large section of people residing in areas where there is acute shortage of healthcare professionals. Almost, seventy per cent of the population in India are rural. The infrastructure in India, similar to other developing countries, is erratic and differs throughout the country. Similarly, the ICT infrastructure is developed in the urban areas whereas there are insufficient ICT facilities in the rural areas. As telehealth depends on the utilisation of ICT infrastructure it is essential to conduct a study to find out the determinants of ICT adoption in the Indian telehealth environment. Moreover, as evident from relevant literature, telehealth is in a nascent stage in India, with most of the projects currently in a pilot study level. As such, it would be practical to conduct the study from an organisational point of view because the organisational adoption of ICT will eventually foster the implementation of telehealth in the domain of Indian healthcare. The study focuses on developing a conceptual framework of ICT adoption in the Indian telehealth environment, as limited research has been conducted in this area. The study highlighted the drivers and barriers of telehealth around the world, reviewed the relevant models of ICT adoption and generated themes to develop the conceptual framework. Empirical testing of the conceptual framework may have the potential to establish and confirm the determinants of ICT adoption in the Indian telehealth environment. The conceptual framework may be utilised for governmental and non-governmental policy level decision making
Optimal strategies for sending information through a quantum channel
Quantum states can be used to encode the information contained in a
direction, i.e., in a unit vector. We present the best encoding procedure when
the quantum state is made up of spins (qubits). We find that the quality of
this optimal procedure, which we quantify in terms of the fidelity, depends
solely on the dimension of the encoding space. We also investigate the use of
spatial rotations on a quantum state, which provide a natural and less
demanding encoding. In this case we prove that the fidelity is directly related
to the largest zeros of the Legendre and Jacobi polynomials. We also discuss
our results in terms of the information gain.Comment: 4 pages, RevTex, final version to appear in Phys.Rev.Let
Multiple copy 2-state discrimination with individual measurements
We address the problem of non-orthogonal two-state discrimination when
multiple copies of the unknown state are available. We give the optimal
strategy when only fixed individual measurements are allowed and show that its
error probability saturates the collective (lower) bound asymptotically. We
also give the optimal strategy when adaptivity of individual von Neumann
measurements is allowed (which requires classical communication), and show that
the corresponding error probability is exactly equal to the collective one for
any number of copies. We show that this strategy can be regarded as Bayesian
updating.Comment: 5 pages, RevTe
A novel interplanetary communications relay
A case study of a potential Earth-Mars interplanetary communications relay, designed to ensure continuous communications, is detailed. The relay makes use of orbits based on artificial equilibrium points via the application of continuous low thrust, which allows a spacecraft to hover above the orbital plane of Mars and thus ensure communications when the planet is occulted with respect to the Earth. The artificial equilibria of two different low-thrust propulsion technologies are considered: solar electric propulsion, and a solar sail/solar electric propulsion hybrid. In the latter case it is shown that the combination of sail and solar electric propulsion may prove advantageous, but only under specific circumstances of the relay architecture suggested. The study takes into account factors such as the spacecraft's power requirements and communications band utilized to determine the mission and system architecture. A detailed contingency analysis is considered for recovering the relay after increasing periods of spacecraft motor failure, and combined with a consideration for how best to deploy the relay spacecraft to maximise propellant reserves and mission duration
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