196,756 research outputs found
Responding to the challenge of cancer in Europe.
No full textThe term “cancer” is commonly used to cover a wide range of diseases which all share
a common feature, namely that cells in affected organs or tissues of the body (e.g. breast,
lung, skin or bone marrow) continue to grow indefinitely, without reference to the needs
of the body. Many cancers have the capacity to spread to other parts of the body and to
kill the patient. With more than 3 million new cases and 1.7 million deaths each year, cancer
currently represents the second most important cause of death and morbidity in Europe.
This volume, published under the Slovenian Presidency of the European Union, is a
review of the current status of cancer control in the European Union. The aim was to
summarize the evidence that should underpin policy for the prevention, management
and palliation of cancer in Europe.
The book has been produced as a collaborative effort between internationally recognized
public health institutes in the European Union, under the umbrella Fighting Against
Cancer Today (FACT). FACT is co-funded by the Government of Slovenia and the
European Commission’s Health and Consumer Protection Directorate, with additional
support from the European Observatory on Health Systems and Policies
Anchoring energy for nematic liquid crystals: contribution from the spatial variation of the elastic constants
No full textLandau theory for the surface induced order transitions in the nematic phase with hydrogen bonded molecules
No full textSome current problems in perovskite nano-ferroelectrics and multiferroics : kinetically-limited systems of finite lateral size
No full textWe describe some unsolved problems of current interest; these involve quantum critical points in ferroelectrics and problems which are not amenable to the usual density functional theory, nor to classical Landau free energy approaches (they are kinetically limited), nor even to the Landau-Kittel relationship for domain size (they do not satisfy the assumption of infinite lateral diameter) because they are dominated by finite aperiodic boundary conditions.Peer reviewe
Evidence for frequency dependent diffusion in hydrogel
No full textThe electrical response of a hydrogel to an external periodic voltage is investigated by means of the impedance spectroscopy technique. We show that the experimental data, obtained in the linear regime, for the real and imaginary parts of the electric impedance can be interpreted using the Poisson-Nernst-Planck model, taking into account the frequency dependence of viscosity and the non blocking character of the electrodes. We estimate the parameters (ion density, electrode conductivity, and diffusion coefficient) when varying the quantity of salt in the hydrogel. Our experimental data indicate that the bulk density of ions increases with the salt concentration, tending to a saturation value, whereas the electrode conductivity is independent of it. Finally, the parameters defining the dispersion of the diffusion coefficient depend weakly on the salt concentration
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
A comparison of sensors for minimizing the primary signal in planar-array magnetic induction tomography
No full textIn biomedical magnetic induction tomography (MIT), measurement precision may be improved by incorporating some form of primary field compensation/cancellation scheme. Schemes which have been described previously include gradiometric approaches and the use of 'back-off' coils. In each of these methods, however, the primary field cancellation was achieved only for a single transmitter/receiver combination. For the purpose of imaging, it would be desirable for a fully electronically scanned MIT system to provide a complete set of measurements, all with the primary field cancelled. A single channel suitable for incorporation into an MIT system with planar-array geometry is described. The transmitter is a 6-turn coil of wire 5 cm in diameter. The receiver is a surface mount inductor, of inductance 10 µH, mounted such that, in principle, no net primary field flux threads it. The results of measurements carried out with the single channel system suggest that the signal due to the primary excitation field can be reduced on average by a factor of 298 by the sensor geometry over the operating frequency range 1–10 MHz. The standard deviation and drift of the signal with the system adjusted for maximum primary field cancellation, expressed as a percentage of the signal when the receiver coil was rotated until its axis of sensitivity lay along the primary field, were 0.0009% and 0.009%, respectively. The filter time constant used was 30 ms
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