17,912 research outputs found
Count three for wear able computers
This paper is a postprint of a paper submitted to and accepted for publication in the Proceedings of the IEE Eurowearable 2003 Conference, and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library.
A revised version of this paper was also published in Electronics Systems and Software, also subject to Institution of Engineering and Technology Copyright. The copy of record is also available at the IET Digital Library.A description of 'ubiquitous computer' is presented. Ubiquitous computers imply portable computers embedded into everyday objects, which would replace personal computers. Ubiquitous computers can be mapped into a three-tier scheme, differentiated by processor performance and flexibility of function. The power consumption of mobile devices is one of the most important design considerations. The size of a wearable system is often a design limitation
On the Brauer groups of symmetries of abelian Dijkgraaf-Witten theories
Symmetries of three-dimensional topological field theories are naturally
defined in terms of invertible topological surface defects. Symmetry groups are
thus Brauer-Picard groups. We present a gauge theoretic realization of all
symmetries of abelian Dijkgraaf-Witten theories. The symmetry group for a
Dijkgraaf-Witten theory with gauge group a finite abelian group , and with
vanishing 3-cocycle, is generated by group automorphisms of , by
automorphisms of the trivial Chern-Simons 2-gerbe on the stack of -bundles,
and by partial e-m dualities.
We show that transmission functors naturally extracted from extended
topological field theories with surface defects give a physical realization of
the bijection between invertible bimodule categories of a fusion category and
braided auto-equivalences of its Drinfeld center. The latter provides the
labels for bulk Wilson lines; it follows that a symmetry is completely
characterized by its action on bulk Wilson lines.Comment: 21 pages, 9 figures. v2: Minor changes, typos corrected and
references added. v3: Typos correcte
Can tithonia diversifolia (Hemsl). A. Gray, a pantropic invasive weed species, cleanup spent lubricating oil polluted soils?
Two pot trials were conducted in the crop garden of the Department of Crop Protection and Environmental Biology, University of Ibadan between March and June 2005, to evaluate the phytoremediating potential of Tithonia diversifolia in spent oil polluted soil to enhance the agricultural productivity. The study was a completely randomized design with three replicates. Varying pollution levels were created by administering spent lubricating oil at 0, 50, 100, 150 and 200 ml per 4-kg soil in pots. Two Tithonia seedlings were transplanted into each pot and were monitored for 12 weeks. At commencement of the two trials, lead concentrations in the soil averaged 3.78 mg/kg and 37.75 mg/kg in the control and in 200-ml treatment respectively, and cadmium concentrations averaged 0.73 mg/kgand 2.05 mg/kg in the control and 200-ml treatment respectively. At the end of the two trials, lead content was reduced to 0.00 and 11.88 mg/kg and cadmium content was reduced to 0.00 to 0.43 mg/kg in the control and 200-ml treatments respectively. Tithonia seedlings were able to absorb lead and cadmium in the polluted soils, and contents in the root were more than contents in the shoot. The lead and cadmium contents in the shoot compared to the root were about 54% and 30% respectively. Theimplication of the results for the quality of vegetable produced at urban and peri-urban roadside and wetland gardens is discussed
Pengelolaan Pelabuhan Cartagena Spanyol sebagai Kerangka Optimalisasi Pelabuhan di Negeri Sendiri
Dampak ekonomi dari pengembangan Pelabuhan Cartagena sangat pesat dalam kurun waktu 10 tahun terakhir. Hal ini ditunjukkan dengan adanya kenaikan Product Domestic Regional Bruto(PDRB) sektor kelautan dengan Gross Value Added(GVA) dari nilai 1,1% menjadi 3,81% dan nilai 0,1% menjadi 2,11% untuk sektor tenaga kerja. Dengan metode Regional Input-Output Tables(R-IOT) dan metode pendekatan Input-Output(I-O) didapat data dan angka â angka yang bisa memberikan beberapa terobosan pengembangan dari sektor forex pelabuhan maupun sektor pariwisata maritim, sehingga Pelabuhan Cartagena sebagai pemberi impact terbesar ke 5 dari 28 pelabuhan yang ada di Spanyol dan menempatkan Spanyol menduduki peringkat 2 dalam hal kedatangan turis dengan kapal pesiar di Eropa setelah Italia.Indonesia juga mencontoh dengan strategi yang sama sektor-sektor yang mempengaruhi PDRB,tenaga kerja pada sektor kelautan,keringanan bidang pajak, kemudahan bidang tenaga kerja, jaminan keamanan bagi investor yang menanam modalnya disektor kelautan, dengan didukung oleh akses-akses transportasi yang mudah, cepat, dan simpul-simpul kemacetan ditiadakan. Seluruh akses yang menuju kepusat-pusat ekonomi kelautan diperbaiki, industri pendukung baik dari sektor swasta maupun Badan Usaha Milik Negara(BUMN) juga berbenah. Indonesia mulai memandang laut sebagai masa depan,tidak lagi membelakangi laut, seluruh aktifitas dan kebijakannya bersifat sustainable .Potensi kelautan yang demikianlah yang dapat menjamin masa depan generasi mendatang menjadi lebih baik
Radio Timing and Optical Photometry of the Black Widow System PSR J1953+1846A in the Globular Cluster M71
We report on the determination of the astrometric, spin and orbital
parameters for PSR J1953+1846A, a "black widow" binary millisecond pulsar in
the globular cluster M71. By using the accurate position and orbital parameters
obtained from radio timing, we identified the optical companion in ACS/Hubble
Space Telescope images. It turns out to be a faint (m_F606W>=24, m_F814W>=23)
and variable star located at only ~0.06" from the pulsar timing position. The
light curve shows a maximum at the pulsar inferior conjunction and a minimum at
the pulsar superior conjunction, thus confirming the association with the
system. The shape of the optical modulation suggests that the companion star is
heated, likely by the pulsar wind. The comparison with the X-ray light curve
possibly suggests the presence of an intra-binary shock due to the interaction
between the pulsar wind and the material released by the companion. This is the
second identification (after COM-M5C) of an optical companion to a black widow
pulsar in a globular cluster. Interestingly, the two companions show a similar
light curve and share the same position in the color magnitude diagram.Comment: Accepted for publication by ApJ; 33 Pages, 10 Figures, 3 Table
Neural Substrates of Reliability-Weighted Visual-Tactile Multisensory Integration
As sensory systems deteriorate in aging or disease, the brain must relearn the appropriate weights to assign each modality during multisensory integration. Using blood-oxygen level dependent functional magnetic resonance imaging of human subjects, we tested a model for the neural mechanisms of sensory weighting, termed âweighted connections.â This model holds that the connection weights between early and late areas vary depending on the reliability of the modality, independent of the level of early sensory cortex activity. When subjects detected viewed and felt touches to the hand, a network of brain areas was active, including visual areas in lateral occipital cortex, somatosensory areas in inferior parietal lobe, and multisensory areas in the intraparietal sulcus (IPS). In agreement with the weighted connection model, the connection weight measured with structural equation modeling between somatosensory cortex and IPS increased for somatosensory-reliable stimuli, and the connection weight between visual cortex and IPS increased for visual-reliable stimuli. This double dissociation of connection strengths was similar to the pattern of behavioral responses during incongruent multisensory stimulation, suggesting that weighted connections may be a neural mechanism for behavioral reliability weighting
Climate Change and Water Resources in Ireland: Initial investigations using downscaled GCMS and hydrological modelling techniques.
Predictions are made of changes in effective runoff at a
high spatial resolution for the island of Ireland under different climate
change scenarios. Although previous studies have examined the response
of selected Irish catchments to future climate scenarios this is the first time
that the whole area of the island has been considered. This paper discusses
the initial investigation that has been carried out and outlines research
currently in progress.
Polynomial regression techniques are used to derive a baseline climatology
for Ireland. Downscaled precipitation and evaporation data from
the United Kingdom Climate Program (UKCIP)for the Medium-low 2080
scenario is used together with the baseline data for the initial investigation.
The precipitation and potential evaporation (PE) data are converted
to a suitable form for input to HYSIM. Two sets of simulations are carried
out for 825 JO x JO km grid squares covering the land area of the island of
Ireland for the baseline period and the 2080 scenario. The hydrological
parameters for each of these squares are considered to be identical for this
initial investigation. The results of this investigation are presented.
Future work is considered, focusing on the parameterisation of HYSIM
for individual grid cells. The initial investigation demonstrates that the
representation of storage is of particular importance. Parameter values
are derived for each square using data from the Soil Survey of Ireland, the
CORINE land use database and information on major aquifers provided
by the Geological Survey of Ireland. The flexible data requirements of
HYSIM allow some representation of the diverse hydrological conditions
found within Ireland. For example, approximately 40% of Ireland is underlain
by limestones, many of which are karstified. These karst aquifers are
an important water resource and can respond very rapidly to precipitation
inputs. There are also extensive areas of lakes and wetlands. The land area
is divided into broad hydrological zones to provide some representation of
this variability
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Comparative Studies on Water- and Vapor-Based Hydrothermal Carbonization: Process Analysis
Hydrothermal carbonization (HTC) reactor systems used to convert wet organic wastes into value-added hydrochar are generally classified in the literature as liquid water-based (HTC) or vapor-based (VTC). However, the distinction between the two is often ambiguous. In this paper, we present a methodological approach to analyze process conditions for hydrothermal systems. First, we theoretically developed models for predicting reactor pressure, volume fraction of liquid water and water distribution between phases as a function of temperature. The reactor pressure model predicted the measured pressure reasonably well. We also demonstrated the importance of predicting the condition at which the reactor system enters the subcooled compression liquid region to avoid the danger of explosion. To help understand waterâfeedstock interactions, we defined a new solid content parameter %S(T) based on the liquid water in physical contact with feedstock, which changes with temperature due to changes in the water distribution. Using these models, we then compared the process conditions of seven different HTC/VTC cases reported in the literature. This study illustrates that a large range of conditions need to be considered before applying the label VTC or HTC. These tools can help in designing experiments to compare systems and understand results in future HTC researc
Current perspectives on prevention of vascular cognitive impairment and promotion of vascular brain health
\ua9 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. Introduction: The true global burden of vascular cognitive impairment (VCI) is unknown. Reducing risk factors for stroke and cardiovascular disease would inevitably curtail VCI. Areas Covered: The authors review current diagnosis, epidemiology, and risk factors for VCI. VCI increases in older age and by inheritance of known genetic traits. They emphasize modifiable risk factors identified by the 2020 Lancet Dementia Commission. The most profound risks for VCI also include lower education, cardiometabolic factors, and compromised cognitive reserve. Finally, they discuss pharmacological and non-pharmacological interventions. Expert Opinion: By virtue of the high frequencies of stroke and cardiovascular disease the global prevalence of VCI is expectedly higher than prevalent neurodegenerative disorders causing dementia. Since ~ 90% of the global burden of stroke can be attributed to modifiable risk factors, a formidable opportunity arises to reduce the burden of not only stroke but VCI outcomes including progression from mild to the major in form of vascular dementia. Strict control of vascular risk factors and secondary prevention of cerebrovascular disease via pharmacological interventions will impact on burden of VCI. Non-pharmacological measures by adopting healthy diets and encouraging physical and cognitive activities and urging multidomain approaches are important for prevention of VCI and preservation of vascular brain health
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