1,254 research outputs found
Harbour Light. Port and transport related EU policy and regulations: The professionals' guide
Document type: Boo
Avaliação do potencial de cinco cultivares de videiras americanas para sucos de uva no sul de Minas Gerais.
Objetivou-se, no presente trabalho realizar uma caracterização dos sucos de uva de cinco cultivares de videira americana Vitis labrusca (Folha de Figo, Alwood, Concord, BRS-Rúbea e Isabel) segundo suas características visuais, olfativas e gustativas, utilizando um método descritivo por um painel de degustadores da Embrapa Uva e Vinho (EMBRAPA/CNPUV) de Bento Gonçalves e da Associação Brasileira de Enologia (ABE), constituído por doze degustadores. De acordo com os resultados, os sucos das cultivares Isabel e Folha de Figo foram superiores aos demais, segundo a análise de componentes principais (ACP), principalmente pelas variáveis limpidez, equilíbrio olfativo, intensidade e corpo gustativo, persistência olfato-gustativa e julgamento geral (notas). O suco Folha de Figo foi superior ao Isabel quanto à tonalidade, sendo o primeiro caracterizado como vermelho-violáceo. A cultivar Folha de Figo é a mais utilizada na região para a produção de suco, podendo os produtores utilizarem também a cultivar Isabel, que mostrou potencial nas condições edafo-climáticas do sul de Minas Gerais.Disponível também on-line
Технология транспортировки высокопарафинистых нефтей с применением депрессорных присадок
Объектом исследования являются технологии транспортировки высокопарафинстой нефти. Цель работы – анализ различных технологических решений, позволяющих улучшить перекачку высокопарафинистых нефтей. В процессе исследования рассматривались различные способы перекачки высокопарафинистых нефтей путем улучшения реологических характеристик; приведена технология, способы, параметры обработки высокопарафинистых нефтей депрессорными присадками. В результате исследования были определены положительные и отрицательные стороны различных технологий транспортировки высокопарафинистых нефтей, проанализирована технология обработки нефти депрессорной присадки, параметры обработки.The object of the research is the technology of transportation of high-paraffin oil. The purpose of the work is to analyze various technological solutions that allow improving the transmission of highly paraffinic oils. In the process of investigation, various ways of transmission highly paraffinic oils by improving rheological characteristics were considered; the technology, methods, parameters of treatment of highly paraffinic oils with depressant additives are given. As a result of the work, the positive and negative aspects of various technologies for transporting highly paraffinic oils were determined, the technology of oil treatment of the depressant additive, processing parameters were analyzed
Интеллектуальные энергосистемы. Т. 1
Настоящий сборник содержит материалы V Международного молодежного форума "Интеллектуальные энергосистемы", проведенного 9 - 13 октября 2017г. на базе Энергетического института Томского политехнического университета
A Kato type Theorem for the inviscid limit of the Navier-Stokes equations with a moving rigid body
The issue of the inviscid limit for the incompressible Navier-Stokes
equations when a no-slip condition is prescribed on the boundary is a famous
open problem. A result by Tosio Kato says that convergence to the Euler
equations holds true in the energy space if and only if the energy dissipation
rate of the viscous flow in a boundary layer of width proportional to the
viscosity vanishes. Of course, if one considers the motion of a solid body in
an incompressible fluid, with a no-slip condition at the interface, the issue
of the inviscid limit is as least as difficult. However it is not clear if the
additional difficulties linked to the body's dynamic make this issue more
difficult or not. In this paper we consider the motion of a rigid body in an
incompressible fluid occupying the complementary set in the space and we prove
that a Kato type condition implies the convergence of the fluid velocity and of
the body velocity as well, what seems to indicate that an answer in the case of
a fixed boundary could also bring an answer to the case where there is a moving
body in the fluid
Constraints on a Massive Dirac Neutrino Model
We examine constraints on a simple neutrino model in which there are three
massless and three massive Dirac neutrinos and in which the left handed
neutrinos are linear combinations of doublet and singlet neutrinos. We examine
constraints from direct decays into heavy neutrinos, indirect effects on
electroweak parameters, and flavor changing processes. We combine these
constraints to examine the allowed mass range for the heavy neutrinos of each
of the three generations.Comment: latex, 29 pages, 7 figures (not included), MIT-CTP-221
Разработка технологии ручной дуговой и механизированной под слоем флюса сварки нахлесточных соединений пластин
В выпускной квалификационной работе разработана технология ручной дуговой и механизированной сварки под слоем флюса нахлёсточных соединений пластин из стали 10Г2С1Д, предложено устройство для сварки. Произведены расчеты режимов сварки.
В экономической части ВКР выполнен расчет экономического эффекта от внедрения новой технологии. Рассмотрены вопросы безопасности труда производственных рабочих и охраны окружающей среды. Выпускная квалификационная работа бакалавра выполнена в текстовом редакторе Microsoft Word 2016In final qualifying wok the technology of manual arc and mechanized welding under a layer of flux of lap joints of plates from steel 10G2C1D, is developed, the device for welding is suggested.
Calculations of welding modes are dene. In economic pat of final qualifying work, the calculation of the economic effect from the introduction of new technology is fulfilled. Issues of labor safety of industrial warblers and environmental protection are considered. The final qualifying work is done in a text editor Microsoft word 2016
NectarCAM : a camera for the medium size telescopes of the Cherenkov Telescope Array
NectarCAM is a camera proposed for the medium-sized telescopes of the
Cherenkov Telescope Array (CTA) covering the central energy range of ~100 GeV
to ~30 TeV. It has a modular design and is based on the NECTAr chip, at the
heart of which is a GHz sampling Switched Capacitor Array and a 12-bit Analog
to Digital converter. The camera will be equipped with 265 7-photomultiplier
modules, covering a field of view of 8 degrees. Each module includes the
photomultiplier bases, high voltage supply, pre-amplifier, trigger, readout and
Ethernet transceiver. The recorded events last between a few nanoseconds and
tens of nanoseconds. The camera trigger will be flexible so as to minimize the
read-out dead-time of the NECTAr chips. NectarCAM is designed to sustain a data
rate of more than 4 kHz with less than 5\% dead time. The camera concept, the
design and tests of the various subcomponents and results of thermal and
electrical prototypes are presented. The design includes the mechanical
structure, cooling of the electronics, read-out, clock distribution, slow
control, data-acquisition, triggering, monitoring and services.Comment: In Proceedings of the 34th International Cosmic Ray Conference
(ICRC2015), The Hague, The Netherlands. All CTA contributions at
arXiv:1508.0589
A systematic review of methods used to study fish in saltmarsh flats
There is a growing body of research highlighting the importance of saltmarshes as habitats for fish for feeding, refuge from predation and reproduction. However, more work is needed on fish on vegetated marsh flats (or surfaces). We reviewed 60 studies that used 21 methods to sample fish assemblages on saltmarsh flats. Drop samplers, fyke nets and pop nets were most frequently employed, with considerably more studies being conducted in graminoid than succulent marsh. Reporting of sampling temporal and tidal details, environmental variables and fish attributes was inconsistent. Most of the papers focussed on one or more of conservation management, comparisons among habitat types, and the use of saltmarsh (including fish activity type or residency status). Important potential areas of research include the relationships between the fish assemblages of saltmarsh flats and coastal fisheries, the effects of invasive plant species and marsh restoration efforts in areas outside the United States, and the potential effects of sea-level rise on vegetated flats as fish habitat. Sampling methods that provide density measures are likely to be most useful for most of this research. Thus, drop samplers and pop nets are an appropriate choice, the former in graminoid saltmarshes and the latter in succulent saltmarshes
The HADES Tracking System
The tracking system of the dielectron spectrometer HADES at GSI Darmstadt is
formed out of 24 low-mass, trapezoidal multi-layer drift chambers providing in
total about 30 square meter of active area. Low multiple scattering in the in
total four planes of drift chambers before and after the magnetic field is
ensured by using helium-based gas mixtures and aluminum cathode and field
wires. First in-beam performance results are contrasted with expectations from
simulations. Emphasis is placed on the energy loss information, exploring its
relevance regarding track recognition.Comment: 6 pages, 4 figures, presented at the 10th Vienna Conference on
Instrumentation, Vienna, February 2004, to be published in NIM A (special
issue
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