720 research outputs found
BVOC fluxes from a bioenergy maize plantation
Germany, and other countries as well, intends to largely increase the plantation area for bioenergy production in the near future. Potential plant species that are likely to be intensively cultivated are corn, energy grasses, and woody crops, which might emit biogenic volatile organic compounds (BVOC) at higher rates than common agricultural species. Due to the reactivity of some BVOCs with oxidizing atmospheric compounds, future land-cover changes and the extension of plantation area might affect air quality and the formation of secondary organic aerosols with potential consequences for the local climate. In the current project, we measured the BVOC fluxes from maize plants on an agricultural site in Northeastern Germany using automated large chambers (5.625 m3) and online detection of BVOCs by proton transfer mass spectrometry (PTR-MS). BVOC fluxes were continuously followed for 7 weeks, from the flowering of the plants to the senescence stage. The highest fluxes were observed for sesquiterpenes, monoterpenes, and acetone during grain development and ripening. After the ripening process mainly monoterpenes and acetone still show substantial emission rates
Avaliação térmica de farinhas e amidos de sementes de Araucaria angustifolia de diferentes procedências, do Estado do Paraná.
Farinhas e amidos de pinhão (Araucaria angustiofolia) foram extraídos, caracterizadas e avaliadas por TG-DTA e DSC. As curvas TG das farinhas são similares à do amido, excetuando à DTA deste que possui um evento exotérmico mais intenso a 532 ºC. A quantidade de água no processo de gelatinização foi inversamente proporcional à entalpia
S-band Polarization All Sky Survey (S-PASS): survey description and maps
We present the S-Band Polarization All Sky Survey (S-PASS), a survey of
polarized radio emission over the southern sky at Dec~ taken with
the Parkes radio telescope at 2.3~GHz. The main aim was to observe at a
frequency high enough to avoid strong depolarization at intermediate Galactic
latitudes (still present at 1.4 GHz) to study Galactic magnetism, but low
enough to retain ample Signal-to-Noise ratio (S/N) at high latitudes for
extragalactic and cosmological science. We developed a new scanning strategy
based on long azimuth scans, and a corresponding map-making procedure to make
recovery of the overall mean signal of Stokes and possible, a
long-standing problem with polarization observations. We describe the scanning
strategy, map-making procedure, and validation tests. The overall mean signal
is recovered with a precision better than 0.5\%. The maps have a mean
sensitivity of 0.81 mK on beam--size scales and show clear polarized signals,
typically to within a few degrees of the Galactic plane, with ample S/N
everywhere (the typical signal in low emission regions is 13 mK, and 98.6\% of
the pixels have S/N ). The largest depolarization areas are in the inner
Galaxy, associated with the Sagittarius Arm. We have also computed a Rotation
Measure map combining S-PASS with archival data from the WMAP and Planck
experiments. A Stokes map has been generated, with a sensitivity limited to
the confusion level of 9 mK.Comment: Accepted for publication on MNRAS. Maps are available for download at
the website indicated in the manuscrip
Проектирование системы пожарной сигнализации и разработка системы оповещения автомобильной станции техобслуживания
Объектом исследования является предприятие: Автосервис на Шоссейной. Станция технического обслуживания легковых автомобилей, находиться в городе Юрга, по адресу ул. Шоссейная, д.33 с общей площадью территории предприятия равной 108 м2.
Цель работы – Спроектировать оборудование автоматической пожарной сигнализацией и систему оповещения людей о пожаре для станции технического обслуживания «Автомастерская».
В процессе исследования проводились анализ; систематизация; проектирование.
В результате исследования: на объекте исследования спроектирована система установки автономных тепловых пожарных извещателей «ИП101-1А-А1», в полной мере соответствуюшая предъявляемым требованиям.The object of research is the enterprise: Service at highway. The station maintenance cars, located in the town of Yurga, at ul. Highway, d.33 with a total area of the territory of the enterprise equal to 108 m2.
Purpose - designed equipment automatic fire alarm system and warning people about the fire to the service station "body shop".
The study carried out an analysis; systematization; design.
As a result of the study: on-site study designed mounting system of autonomous heat fire detectors "IP101-1A-A1", fully sootvetstvuyushaya requirements
Deterministic Ultracold Ion Source targeting the Heisenberg Limit
The major challenges to fabricate quantum processors and future nano solid
state devices are material modification techniques with nanometre resolution
and suppression of statistical fluctuations of dopants or qubit carriers. Based
on a segmented ion trap with mK laser cooled ions we have realized a
deterministic single ion source which could operate with a huge range of
sympathetically cooled ion species, isotopes or ionic molecules. We have
deterministically extracted a predetermined number of ions on demand and have
measured a longitudinal velocity uncertainty of 6.3m/s and a spatial beam
divergence of 0.6 mrad. We show in numerical simulations that if the ions are
cooled to the motional ground state (Heisenberg limit) nanometre spatial
resolution can be achieved.Comment: 4 pages 4 figures. to be published in pr
Cracking the code of oscillatory activity
Neural oscillations are ubiquitous measurements of cognitive processes and dynamic routing and gating of information. The fundamental and so far unresolved problem for neuroscience remains to understand how oscillatory activity in the brain codes information for human cognition. In a biologically relevant cognitive task, we instructed six human observers to categorize facial expressions of emotion while we measured the observers' EEG. We combined state-of-the-art stimulus control with statistical information theory analysis to quantify how the three parameters of oscillations (i.e., power, phase, and frequency) code the visual information relevant for behavior in a cognitive task. We make three points: First, we demonstrate that phase codes considerably more information (2.4 times) relating to the cognitive task than power. Second, we show that the conjunction of power and phase coding reflects detailed visual features relevant for behavioral response-that is, features of facial expressions predicted by behavior. Third, we demonstrate, in analogy to communication technology, that oscillatory frequencies in the brain multiplex the coding of visual features, increasing coding capacity. Together, our findings about the fundamental coding properties of neural oscillations will redirect the research agenda in neuroscience by establishing the differential role of frequency, phase, and amplitude in coding behaviorally relevant information in the brai
The impact of direct‐acting antiviral agents on liver and kidney transplant costs and outcomes
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146297/1/ajt14895_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146297/2/ajt14895.pd
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