521 research outputs found
Características agronômicas de 13 cultivares de arroz em Sistema Irrigado.
Com o proposito de dar informacoes de pesquisas aos agricultores e tecnicos que lidam com a orizicultura, procurou-se estudar o rendimento de graos e outras caracteristicas agronomicas de 13 cultivares de arroz sob condicoes de irrigacao por inundacao. O conhecimento destes fatores, aliados as boas qualidades de engenho e culinaria, conduzem ao sucesso de uma lavoura comercial. Desse modo, ao se escolher cultivar(es) deve-se verificar, antecipadamente, todas as suas caracteristicas agronomicas e comerciais a fim de evitar frustracoes de safra.bitstream/item/95656/1/CT040001.pd
Использование IoT-технологий в защите окружающей среды
Большинство дискуссий вокруг феномена Интернета вещей (IoT) обычно сводится к тем потенциальным преимуществам для бизнеса и к тем удобствам для пользователей, которые обеспечивают интеллектуальные устройства и объекты, окружающие нас ежедневно. Однако, каким образом Интернет вещей и индустриальный Интернет вещей (M2M - machine-to-machine), то есть беспроводная передача данных и информации между устройствами и объектами, будет способствовать устойчивому развитию и защите окружающей среды.Most of the discussions around the phenomenon of the Internet of Things (IoT) usually boils down to those potential benefits for the business and to those amenities for users that provide intelligent devices and objects that surround us daily. However, how the Internet of things and the industrial Internet of things (M2M - machine-to-machine), that is, the wireless transmission of data and information between devices and objects, can have a beneficial effect on our lives and will contribute to sustainable development and the protection of the environment on the planet
Оценка экономической эффективности проекта разработки и эксплуатации нефтегазового месторождения
Целью работы является технико-экономическое обоснование
разработки обустройства Восточно-Таркосалинского месторождения,
расположенного на контрактной территории РФ.
Актуальность выбранной темы тем, что большинство нефтяных и
газонефтяных месторождений на территории России находятся в стадии
эксплуатации, характеризующейся падающей добычей углеводородов в связи с
постепенным истощением их запасов. Такая сложившаяся ситуация приводит к
необходимости составления новых проектных документов для дальнейшей
разработки (доразработки) месторождений.Materials of such calculations are usually drawn up in the form of special
documents: technical and economic calculations (TER), technical and economic
considerations (TES), technical and economic reports (TED) or feasibility studies of
proposed solutions. Depending on the conclusions of such calculations, the company
decides to proceed to the next stage of geological exploration, to switch to
exploration with the subsequent development of the field, or refuses to continue
works because of the high risk of non-return of investments or the unacceptably low
profitability of future productio
Generation of x-ray radiation in a storage ring by a superconductive cold-bore invacuum undulator
The first beam measurements with a cold-bore superconducting in-vacuum undulator in a storage ring are reported. Undulators are x-ray generators in light sources. The physical limitations of these devices limit the intensity and the brilliance of the x-ray beam. At present the undulators are made from permanent magnets. It was shown in earlier papers that at low electron beam intensities superconductive wires in the vacuum beam pipe can overcome the limitations inherent to permanent magnet undulators. It was argued that the use of these novel devices in light sources with high beam currents may be limited by the extreme anomalous skin effect regime in Cu at 4.2 K, which has so far undergone very little investigation, and the power deposited by the infrared part of the synchrotron radiation. The purpose of this paper is to present measurements of these effects at the synchrotron light source ANKA with stored currents up to 200 mA
Beam heat load and pressure rise in a could vacuum chamber
The beam heat load and the pressure in the vacuum chamber of the cold bore superconducting undulator installed at ANKA (ANgstrom source KArlsruhe) have been monitored for almost two years. Possible sources of the observed heat load could be synchrotron radiation from upstream magnets, image currents, electron and ion bombardment. In this paper, the various possible contributions to the heat load are discussed and compared with experimental results. The dynamic pressure increases nonlinearly with the average beam current. The current where it assumes a maximum varies both with the bunch intensity and with the initial vacuum pressure. A correlation between the heat load and the dynamic pressure has been observed. This study suggests that electron bombardment could explain the beam heat load and pressure rise observed for a bunch length of 10 mm
Beam heat load and pressure rise in a cold vacuum chamber
The beam heat load and the pressure in the vacuum chamber of the cold bore superconducting undulator installed at ANKA (ANgstrom source KArlsruhe) have been monitored for almost two years. Possible sources of the observed heat load could be synchrotron radiation from upstream magnets, image currents, electron and ion bombardment. In this paper, the various possible contributions to the heat load are discussed and compared with experimental results. The dynamic pressure increases nonlinearly with the average beam current. The current where it assumes a maximum varies both with the bunch intensity and with the initial vacuum pressure. A correlation between the heat load and the dynamic pressure has been observed. This study suggests that electron bombardment could explain the beam heat load and pressure rise observed for a bunch length of 10 mm
Testing Beam-Induced Quench Levels of LHC Superconducting Magnets
In the years 2009-2013 the Large Hadron Collider (LHC) has been operated with
the top beam energies of 3.5 TeV and 4 TeV per proton (from 2012) instead of
the nominal 7 TeV. The currents in the superconducting magnets were reduced
accordingly. To date only seventeen beam-induced quenches have occurred; eight
of them during specially designed quench tests, the others during injection.
There has not been a single beam- induced quench during normal collider
operation with stored beam. The conditions, however, are expected to become
much more challenging after the long LHC shutdown. The magnets will be
operating at near nominal currents, and in the presence of high energy and high
intensity beams with a stored energy of up to 362 MJ per beam. In this paper we
summarize our efforts to understand the quench levels of LHC superconducting
magnets. We describe beam-loss events and dedicated experiments with beam, as
well as the simulation methods used to reproduce the observable signals. The
simulated energy deposition in the coils is compared to the quench levels
predicted by electro-thermal models, thus allowing to validate and improve the
models which are used to set beam-dump thresholds on beam-loss monitors for Run
2.Comment: 19 page
The First 1 1/2 Years of TOTEM Roman Pot Operation at LHC
Since the LHC running season 2010, the TOTEM Roman Pots (RPs) are fully
operational and serve for collecting elastic and diffractive proton-proton
scattering data. Like for other moveable devices approaching the high intensity
LHC beams, a reliable and precise control of the RP position is critical to
machine protection. After a review of the RP movement control and position
interlock system, the crucial task of alignment will be discussed.Comment: 3 pages, 6 figures; 2nd International Particle Accelerator Conference
(IPAC 2011), San Sebastian, Spain; contribution MOPO01
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