208 research outputs found

    Hidden magnetic transitions in thermoelectric layered cobaltite, [Ca2_2CoO3_3]0.62_{0.62}[CoO2_2]

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    A positive muon spin rotation and relaxation (μ+\mu^+SR) experiment on [Ca2_2CoO3_3]0.62_{0.62}[CoO2_2], ({\sl i.e.}, Ca3_3Co4_4O9_9, a layered thermoelectric cobaltite) indicates the existence of two magnetic transitions at \sim 100 K and 400 - 600 K; the former is a transition from a paramagnetic state to an incommensurate ({\sf IC}) spin density wave ({\sf SDW}) state. The anisotropic behavior of zero-field μ+\mu^+SR spectra at 5 K suggests that the {\sf IC-SDW} propagates in the aa-bb plane, with oscillating moments directed along the c-axis; also the {\sf IC-SDW} is found to exist not in the [Ca2_2CoO3_3] subsystem but in the [CoO2_2] subsystem. In addition, it is found that the long-range {\sf IC-SDW} order completes below \sim 30 K, whereas the short-range order appears below 100 K. The latter transition is interpreted as a gradual change in the spin state of Co ions %% at temperatures above 400 K. These two magnetic transitions detected by μ+\mu^+SR are found to correlate closely with the transport properties of [Ca2_2CoO3_3]0.62_{0.62}[CoO2_2].Comment: 7 pages, 8 figures. to be appeared in Phys. Rev.

    Advances in Hyperspectral Image Classification: Earth monitoring with statistical learning methods

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    Hyperspectral images show similar statistical properties to natural grayscale or color photographic images. However, the classification of hyperspectral images is more challenging because of the very high dimensionality of the pixels and the small number of labeled examples typically available for learning. These peculiarities lead to particular signal processing problems, mainly characterized by indetermination and complex manifolds. The framework of statistical learning has gained popularity in the last decade. New methods have been presented to account for the spatial homogeneity of images, to include user's interaction via active learning, to take advantage of the manifold structure with semisupervised learning, to extract and encode invariances, or to adapt classifiers and image representations to unseen yet similar scenes. This tutuorial reviews the main advances for hyperspectral remote sensing image classification through illustrative examples.Comment: IEEE Signal Processing Magazine, 201

    Oceanographic and underwater acoustics research conducted during the period 1 May 1961-31 October 1961

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    Research during this six month period was performed during cruises of the CHAIN to the Romanche Trench, to the Puerto Rico Trench, and to the Mediterranean Sea, and during a cruise of the BEAR to the Gulf of Maine. New instrumentation aboard the CHAIN included the 12, 000 joule Boomer and a 25, 000 joule Sparker for continuous Seismic reflection profiles and other research in hydroacoustics. A semiautomatic data recording system for shipboard use was in.stalled and operated by IBM and, to facilitate launching and retrieving deep gear, a closed circuit television system was used . Also the navigational system, GEON, was installed and tested. Prior to the cruises of the summer and fall redesign and refinement of the instrumentation and equipment entailed overhaul of the thermistor chain and contouring temperature recorder, modification of the heat probe for thermal gradient measurements to lessen lowering time, and improvement of the inverted echo-sounding equipment. Research at sea included collecting samples of rock and sediment and photographing the ocean floor in support of research into the structure and dynamics of the Romanche and Puerto Rico Trenches and the Mid-Atlantic Ridge , observing internal waves in the North Atlantic studying water circulation in the Mediterranean, the dynamics of flow through the Strait of Gibraltar (concentrating this year on internal waves there), observing the behavior and measuring the sound scattering properties of deep scattering layers in the Mediterranean, measuring heat flow from the inner Earth across the Mid-Atlantic Ridge and in the western Mediterranean, and studying the relationship between sound transmission and the physical properties of the water and sea floor in the eastern Mediterranean. At Woods Hole various analysis programs progressed. Several of these used programs of digital computing which have been prepared lately at Woods Hole. The precision time source for remote control reported earlier was improved and tested ashore. A tape recording system for Scuba divers was devised and tested satisfactorily in thirty feet of water.Undersea Warfare Branch Office of Naval Research Contracts Nonr-1367(00)NR 261-102 and Nonr-2129(00)NR 261-10

    Review of practice-led research in art, design & architecture

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    This review report sets out the outcomes of a 10 month investigation to describe the landscape of practice-led research in Art, Design and Architecture (ADA) in the UK and beyond. We were asked for a qualitative review but of course it has been important to gather some numbers to check and illustrate our observations. We have consulted widely, both face to face and in the virtual world, with experts and novices in the UK and around the world. We have tried to strike a balance between the natural desire of our colleagues to debate the more contentious aspects of this territory (they were never going to forgo that opportunity) and the equally strong wish of the AHRC that we should provide a clear description of what is happening. We have collected some diverse examples of research and subjected them to various examinations. We have also examined a selection of research projects funded by AHRC and other projects by creative practitioners, funded by a non-research organisation. From all this we have been able to describe the landscape in a straightforward sense: We have measures of the proportions of ADA academics involved in practice-led research. We have clarified differences in the ways that the different ADA disciplines engage with practice-led research and identified some problems that indicate possible future support strategies. We have discussed some problems with general definitions of research and identified issues that should be addressed to ensure that the AHRC definition can be applied to the full range of practice-led research. We have picked out some specific case examples that illustrate the range of contexts, methods and contributions made by practice-led researchers, and more are described in detail in Appendix F. We have also sought to assess how this research relates to the wider international picture in which the UK appears to have a strong position in both volume and development of research. We have also set out some issues that affect this community of researchers: What strengths and weaknesses have we observed and where is there a need to support development? Do the AHRC definition of research and guidance on practice-led research provide an effective framework? We have illustrated the state of development of research in ADA, and some reasons why it is less robust than might be expected from such long established disciplines. We recommend that the career path of researchers in ADA needs some attention and make some suggestions about how that could be achieved. We have also indicated some areas of inquiry that might be supported to advance the theory and methods of practice-led research. In particular we have come to the conclusion that conventional ideas of contribution to knowledge or understanding may not be serving us well. This is significant to fine artists but we believe that it relevant across ADA and a shared effort to develop appropriate new models would be a constructive development. The full set of recommendations can be found in chapter 5

    Desnutrición a partir de la valoración global subjetiva generada por el paciente (VGS-GP) en pacientes con cáncer de cabeza y cuello

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    La desnutrición es una complicación frecuente en pacientes con cáncer de cabeza y cuello (CyC). La Valoración Global Subjetiva Generada por el Paciente (VGS-GP)es una herramienta validada para valorar el estado nutricional. El objetivo del estudio fuedeterminar la frecuencia de desnutrición según VGS-GP en pacientes con cáncer de cabeza y cuello en el Instituto Nacional del Cáncer (INC) “Prof. Dr. Manuel Riveros” en el periodo 2014-2015.Estudioobservacional descriptivo de corte transversal en el que se estudiaron 81 pacientes mayores de 18 años, de ambos sexos condiagnóstico de cáncer de cabeza y cuello en el periodo 2014 - 2015. El estado nutricional de los pacientes fue valorado mediante la herramienta VGS-GP. La VGS-GP mostró una desnutrición moderada/severa del 64,2% (32,1% categorías B y 32,1%categorías C). El 98% de los pacientes presentó complicaciones secundarias, siendo la disfagia el síntoma más frecuente. Las "categorías B y C" se observaron con mayor frecuencia en pacientes del sexo masculino, de edades avanzadas, en estadiosIII/IV de la neoplasia, así como en pacientes sometidos a cirugía y quimioterapia y con cáncer en faringe, cavidad oral y esófago proximal. Según la VGS-GPmás de la mitad de los pacientes con cáncer de cabeza y cuello presentaron desnutrición moderada o severa ("categorías B y C")

    GSM Anjur Syarahan Umum Dr. Philip Kotler

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    KUALA LUMPUR, 29 Mei– Graduate School Of Management (GSM) Universiti Putra Malaysia (UPM) telah menganjur syarahan umum Prof. Dr. Philip Kotler bertajuk The Future of Marketing untuk berkongsi pengalaman dan pengetahuan dalam bidang ekonomi dan pemasaran dunia baru-baru ini

    Student Funded Fellowship 30th Annual Auction for Public Interest

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    Program for the Student Funded Fellowship 30th Annual Auction for Public Interest
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