Rock Cycle
Mostrando 1-12 de 29 artigos, teses e dissertações.
-
1. Extensión de durabilidad de pistones de bombas de fractura hidráulica mediante el empleo de tecnología de nitruración por plasma y PVD
ABSTRACT Hydraulic stimulation technique consists of "fracturing" the formation (rock reservoirs) through pumping a fracturing fluid downhole. This operation is performed by using hydraulic fracturing pumps. The pistons of these pumps are mechanical components performing the intake and compressing fracture fluid by reciprocating action. During this alternati
Matéria (Rio J.). Publicado em: 19/07/2018
-
2. Laboratory study of dynamic mechanical characteristic of granite subjected to confining pressure and cyclic blast loading
Abstract To investigate the deformation characteristic of deep rock under cyclic blasting, the static-dynamic loading experimental equipment was set up. The dynamic strain gauges and high-speed (HS) camera were adopted to obtain strain field and the crack propagation of rock under confining pressure of 0 MPa, 5 MPa and 10 MPa. Under the one-time loading fro
Lat. Am. j. solids struct.. Publicado em: 28/06/2018
-
3. Experimental Investigation on Limit Cycle Wing Rock Effect on Wing Body Configuration Induced by Forebody Vortices
ABSTRACT The purpose of this paper is to present the aerodynamic and flow characteristics of a slender body with a 30° swept wing configuration undergoing a limit cycle oscillation using a synchronous measurement and control technique of wing rock/particle image velocimetry/dynamic pressure associated with the time history of the wing rock motion. The exper
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
-
4. Evidences of the influence of the detonation sequence in rock fragmentation by blasting – Part II
Abstract This paper shows the work conducted at the Experimental Mine of the Research Center of Responsible Mining of the University of São Paulo, taking into account the theoretical issues presented in the first part of the article. The research was performed without changing the production cycle and without resorting to investments in new types of equipme
Rem: Rev. Esc. Minas. Publicado em: 2015-12
-
5. Evidences of the influence of the detonation sequence in rock fragmentation by blasting – Part I
Drilling and blasting are fundamental operations in the mining cycle and consti tute an important component of the mining costs. Rock fragmentation can in principle be managed by means of two options: by increasing or reducing the specific consumption of explosives, or by modifying the drilling pattern. The choice of one or other type of control depends on t
Rem: Rev. Esc. Minas. Publicado em: 2015-09
-
6. Sylvatic foci of the Chagas disease vector Triatoma infestans in Chile: description of a new focus and challenges for control programs
Triatoma infestans is one of the main domestic vectors of Chagas disease. Reports of wild habitat occurrences have recently increased. In Chile, after a successful elimination campaign of T. infestans domestic infestation, a sylvatic focus was reported in bromeliads in the metropolitan region. Here, we report a new focus of sylvatic T. infestans inhabiting r
Memórias do Instituto Oswaldo Cruz. Publicado em: 2010-08
-
7. The "ROCK CYCLE" game : a playful resource for geosciences teaching / Jogo "Ciclo das rochas" : um recurso ludico para o ensino de geociencias
It is relatively easy to find educational games and toys and also papers that report their use for teaching of different disciplines, specially on Mathematics. By the other hand, there are scarce similar experiences in the scientific branch of Geology. This situation has encouraged research on geological games. The Rock Cycle game is a proposal to stimul
Publicado em: 2007
-
8. Influência das condições operacionais na formação e remoção de tortas de filtração de gases.
The present work aims to evaluate the influence of some operational variables on the filtration process and cake detachment, and also the patchy cleaning phenomenon. The studied conditions were maximum pressure drop, 20, 40 and 60 cmc.a., filtration velocity, 5 and 10 cm/s, cleaning velocity, 10 and 15 cm/s and thickness of the cake. Phosphoric rock dust wit
Publicado em: 2007
-
9. Filtração de gases: estudo da deposição de diferentes tortas de filtração em diferentes meios filtrantes.
The particle retention inside a filter medium, after cleaning, significantly improves the initial pressure drop during the subsequent cycle, that is, the residual pressure drop. However, the way as these particles accommodate inside the filter isnt still very clear, as well as, its impact on filtering performance. This work aims to verify the spatial disposa
Publicado em: 2006
-
10. Tectonic evolution of the Maranco-Poço Redondo Domain : records of the Cariris Velhos and Brasiliano orogenesis on the Sergipano belt, NE Brazil / Evolução tectonica do dominio Maranco-Poço Redondo : registro das orogeneses Cariris Velhos e Brasiliana na Faixa Sergipana, NE do Brasil
This Thesis aims to advance in the geological knowledge of the Sergipano Belt, by studying the tectonic evolution for two within seven lithotectonic domains: the Marancó -Poço Redondo Domain. To reach the objective a detailed field work, that used four geological maps (1:100.000) from the Carira Project (PLGB, DNPM-CPRM, 1988) as base maps and a Landsat im
Publicado em: 2005
-
11. PROGRAMA DE GESTÃO AMBIENTAL PARA O PROCESSO DE MINERAÇÃO NO MUNICÍPIO DE SÃO DOMINGOS DO SUL RS.
This job presents a Program of Environmental Administration for the mining process in the municipal district of São Domingos do Sul RS. This work had as tool the methodology followed in the Analysis of the Cycle of LifeALC. This methodology contemplates: a diagnosis on the rising of data of the local reality, reaching social, political, economic and environ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/11/2003
-
12. Efeito do tempo pos-prensagem na adaptação das bases de proteses totais confeccionadas com resina acrilica QC-20 em diferentes ciclos de polimerização
This study evaluated the influence of the post-compressing rest time (immediate, 12 h and 24 h) and the cycles of polymerization (conventional, fast cycle, and by microwave energy) on the adaptation of complete denture bases made with the fast polymerization acrylic resin QC-20. Forty-five plaster rock models were made from a metallic master model of an eden
Publicado em: 2001