2,864 research outputs found
Improving Annotations in Digital Documents
Περιέχει το πλήρες κείμενοAnnotation plays a major role in a user’s reading of a document: from
elementary school students making notes on text books to professors marking up
their latest research papers. A common place for annotations to appear is in the
margin of a document. Surprisingly, there is little systematic knowledge of how,
why and when annotations are written in margins or over the main text. This paper
investigates how margin size impacts the ease with which documents can be
annotated, and user annotation behavior. The research comprises of a two part
investigation: first, a paper study that examines margins and their use in physical
documents; secondly, we evaluate document reader software that supports an extended
margin for annotation in digital documents
Apparent phonon side band modes in pi-conjugated systems: polymers, oligomers and crystals
The emission spectra of many pi-conjugated polymers and oligomers contain
side-band replicas with apparent frequencies that do not match the Raman active
mode frequencies. Using a time dependent model we show that in such many mode
systems, the increased damping of the time dependent transition dipole moment
correlation function results in an effective elimination of the vibrational
modes from the emission spectrum; subsequently causing the appearance of a
regularly spaced progression at a new apparent frequency. We use this damping
dependent vibrational reshaping to quantitatively account for the vibronic
structure in the emission spectra of pi-conjugated systems in the form of
films, dilute solutions and single crystals. In particular, we show that by
using the experimentally measured Raman spectrum we can account in detail for
the apparent progression frequencies and their relative intensities in the
emission spectrum.Comment: Presented in "Optical Probes 2005", Bangalore, Indi
PMH12 National Trends of Psychotropic Medication Use among Patients Diagnosed with Anxiety Disorders: Results from the Medical Expenditure Panel Survey 2004-2009
The cholesterol transporter ABCG1 links cholesterol homeostasis and tumour immunity
ATP-binding cassette transporter G1 (ABCG1) promotes cholesterol efflux from cells and regulates intracellular cholesterol homeostasis. Here we demonstrate a role of ABCG1 as a mediator of tumour immunity. Abcg1-/- mice have dramatically suppressed subcutaneous MB49-bladder carcinoma and B16-melanoma growth and prolonged survival. We show that reduced tumour growth in Abcg1-/- mice is myeloid cell intrinsic and is associated with a phenotypic shift of the macrophages from a tumour-promoting M2 to a tumour-fighting M1 within the tumour. Abcg1-/- macrophages exhibit an intrinsic bias towards M1 polarization with increased NF-κB activation and direct cytotoxicity for tumour cells in vitro. Overall, our study demonstrates that the absence of ABCG1 inhibits tumour growth through modulation of macrophage function within the tumour, and illustrates a link between cholesterol homeostasis and cancer. © 2015 Macmillan Publishers Limited. All rights reserved
Localization of an autonomous mobile robot based on ultrasonic sensory information
Based on ultrasonic sensory information, an approach is proposed for localization of autonomous mobile robot (AMRs). In the proposed method, it will be proven that the combination of three ultrasonic transmitters and two receivers can determine both the position and the orientation of an AMR with respect to a reference frame uniquely. In this manner, since only ultrasonic sensors are used, the proposed method will be highly cost-effective and easy to implement. To show the validity and feasibility of the proposed method, the hardware configuration and a series of experiments will be given for illustration
Renormalization Effects in a Dilute Bose Gas
The low-density expansion for a homogeneous interacting Bose gas at zero
temperature can be formulated as an expansion in powers of ,
where is the number density and is the S-wave scattering length.
Logarithms of appear in the coefficients of the expansion. We show
that these logarithms are determined by the renormalization properties of the
effective field theory that describes the scattering of atoms at zero density.
The leading logarithm is determined by the renormalization of the pointlike scattering amplitude.Comment: 10 pages, 1 postscript figure, LaTe
Detection of Novel Enterovirus with Emergency Department Based Syndromic Surveillance System in Taipei City
速い無衝突磁気再結合の計算機によるモデル化
Particle simulations of collisionless tearing, reconnection and coalescence of magnetic fields for a sheet-pinch configuration show that reconnection is Sweet-Parker like in the tearing and island formation phase. It is much faster to explosive in the island coalescence stage. Island coalescence is the most energetic process arrl leads to large ion temperature increase and oscillations in the merged state. Similar phenomena have been observed in equivalent MHD simulations.Coalescence and its effects, as observed in our simulations, may explain many of the features of solar flares and coronal X-ray brightening
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