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Sample records for deepwater campos basin

  1. From obc seismic to porosity volume: A pre-stack analysis of a turbidite reservoir, deepwater Campos Basin, Brazil

    Science.gov (United States)

    Martins, Luiz M. R.

    The Campos Basin is the best known and most productive of the Brazilian coastal basins. Turbidites are, by far, the main oil-bearing reservoirs. Using a four component (4-C) ocean-bottom-cable (OBC) seismic survey I set out to improve the reservoir characterization in a deep-water turbidite field in the Campos Basin. In order to achieve my goal, pre-stack angle gathers were derived and PP and PS inversion were performed. The inversion was used as an input to predict the petrophysical properties of the reservoir. Converting seismic reflection amplitudes into impedance profiles not only maximizes vertical resolution but also minimizes tuning effects. Mapping the porosity is extremely important in the development of a hydrocarbon reservoirs. Combining seismic attributes derived from the P-P data and porosity logs I use linear multi-regression and neural network geostatistical tools to predict porosity between the seismic attributes and porosity logs at the well locations. After predicting porosity in well locations, those relationships were applied to the seismic attributes to generate a 3-D porosity volume. The predicted porosity volume highlighted the best reservoir facies in the reservoir. The integration of elastic impedance, shear impedance and porosity improved the reservoir characterization.

  2. Deep-water Drilliinae, Cochlespirinae and Oenopotinae (Mollusca: Gastropoda: Turridae from the Campos Basin, southeast Brazil

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    Raquel Medeiros Andrade Figueira

    2010-08-01

    Full Text Available Samples of a soft-bottom community from the continental slope of Campos Basin, off southeast Brazil, were obtained between 2001 and 2003 by the Research Vessel “Astro-Garoupa” with a 0.25 m2 box corer or by dredging with a Charcot dredge. A total of 177 samples were taken at depths ranging from 700 to 1950 m. Mollusks were present at all of the stations and among Gastropoda the Turridae showed the highest diversity. Within the family Cochlespirinae we found: Leucosyrinx tenoceras (Dall, 1889, L. verrillii (Dall, 1881, expanding the known distribution of the latter species farther south, and L.? subgrundifera (Dall, 1888, which is the first record of this species for the South Atlantic and the shallowest depth at which it has ever been found. Within the family Drilliinae we found Splendrillia centimata (Dall, 1889, also the first record of this species for the South Atlantic and its shallowest depth. Within the subfamily Oenopotinae we describe here three new species in the genus Oenopota Mörch, 1852: O. seraphina n. sp., O. diabula n. sp. and O. carioca n. sp.

  3. Deep-water Mangeliinae, Taraninae and Clathurellinae (Mollusca: Gastropoda: Conoidea: Turridae from the Campos Basin, southeast Brazil

    Directory of Open Access Journals (Sweden)

    Raquel Medeiros Andrade Figueira

    2010-11-01

    Full Text Available During the program “Environmental Characterization of the Campos Basin, RJ, Brazil”, from 2001 to 2003, samples were taken of soft bottoms from the continental slope of Campos Basin (off southeast Brazil by the Research Vessel “Astro-Garoupa” with a 0.25 m2 box corer or by dredging with a Charcot dredge; 117 stations with depths from 700 to 1950 m were sampled. There were molluscs in all samples, and among Gastropoda the Turridae showed the highest diversity. Here we present the results obtained for the subfamilies Mangeliinae, Taraninae and Clathurellinae. Two species were found within Mangeliinae: Benthomangelia cf. macra (Watson, 1881 and Benthomangelia enceladus n. sp. Within Taraninae only one undescribed species was found: Taranis tanata n. sp. Within Clathurellinae we found four species: Corinnaeturris leucomata (Dall, 1881, recorded for the first time in the South Atlantic; Corinnaeturris rhysa (Watson, 1881, extending its described depth range; Corinnaeturris angularis n. sp., Typhlomangelia nivalis (Lovén, 1846, expanding its known distribution farther south; and Drilliola pulchella (Verrill, 1880. The type material of Drilliola loprestiana (Calcara, 1841, previously considered lost, has been located and is illustrated here. Drilliola crispata (Cristofori and Jan, 1832 is considered to be a nomen dubium.

  4. Paleoenvironmental changes and influence on Operculodinium centrocarpum during the Quaternary in the Campos Basin, southwestern Brazil

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    Santos, Alessandra; de Araujo Carvalho, Marcelo; de Oliveira, Antônio Donizeti; Mendonça Filho, João Graciano

    2017-12-01

    The purpose of this paper is to document the changes observed in the Quaternary dinoflagellate assemblages from 80 core samples from the Campos Basin. The Interglacial (Subzone X1), Glacial (Subzones Y5 to Y2), Last Glacial Maximum (Subzone Y1) and Post-Glacial (Zone Z) intervals were identified. High abundance of Operculodinium centrocarpum suggests the warm, high salinity and nutrient-poor water conditions dominated the upper water column of the Campos Basin. The climate and oceanic current dynamic of the continental slope of the Campos Basin appears to has been a significant controlling factor in the distribution of dinocysts, particularly of O. centrocarpum, during the Pleistocene/Holocene transition.

  5. Actual stage of organic geochemical knowledge from Campos and Espirito Santo basins, Brazil

    International Nuclear Information System (INIS)

    Gaglianone, P.C.; Trindade, L.A.F.

    1987-01-01

    Campos and Espirito Santo basins display several similar geochemical aspects. The microbial and other degradation processes caused changes in the composition of the oils in the reservoir rocks. The oils are biodegraded in different degrees, with the reservoir temperature developing an important role in the control of the biodegradation process. The migration pathway model is similar for Campos and Espirito Santo basins, involving the upward secondary migration through a window in the evaporitic seals. The oils passed to the marine sequence where migration and accumulation were controlled by faults, regional unconformities and by reservoirs. The geochemical correlation of oils are realized by gaseous and liquid chromatography analysis, carbon isotopes and biolabelled compounds. (author)

  6. Raft tectonics in northern Campos Basin; Tectonica de jangada (raft tectonics) na area norte da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Marilia R. de [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacases, RJ (Brazil)]|[PETROBRAS, Macae, RJ (Brazil). Unidade de Negocio da Bacia de Campos; Fugita, Adhemar M. [Universidade do Estado, Rio de Janeiro, RJ (Brazil). Programa de Recursos Humanos da ANP

    2004-07-01

    In the northern area of Campos Basin salt gliding/spreading processes promoted the break-up and transport of Cretaceous and Tertiary rocks overlying the evaporites. This process is known as raft tectonics, and it represents the most extreme form of thin-skinned extension above the salt decollement surface. Three distinct geotectonic domains were recognized that formed in response to the raft tectonics. The first one, confined to the shallower shelf portion of the basin, is characterized by minor extension (pre-raft domain), probably because of small salt thickness and low gradient. In the second domain (or disorganized rafts domain), located in distal platformal and slope areas, seismic sections show the occurrence of blocks or rafts with angular shapes, sometimes imbricated and frequently discontinuous. In the third domain, or domain of organized rafts, located in bacinal region, seismic sections show a more continuous raft pattern, often folded because of salt compression in the distal portions of the basin. The main purposes of this work is to characterize these three tectonic domains distinguished by raft tectonics, as well as their importance in hydrocarbon accumulations in calcarenites. (author)

  7. Paleomorphology of the upper part of the Macae formation, Namorado field, Campos basin; Paleomorfologia do intervalo superior da formacao Macae, Campo de Namorado, Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Barboza, Eduardo Guimaraes [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Inst. de Geociencias. Programa de Pos-Graduacao em Geociencias; Tomazelli, Luiz Jose; Ayup-Zouain, Ricardo Norberto [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Inst. de Geociencias. Centro de Estudos de Geologia Costeira e Oceanica; Viana, Adriano Roessler [PETROBRAS, Rio de Janeiro, RJ (Brazil). Exploracao e Producao. Edificio Sede

    2004-07-01

    The Macae Formation (Late Albian-Turonian of the Campos Basin) is represented by a thick column of carbonate sediments whose deposition began soon after the evaporitic phase that marks the beginning of the marine occupation of the basin. The top of this interval is represented by an unconformity (Type I), indicative of a variation in the base level of the basin, on which the turbidities of the basal sequence of the Namorado Field were deposited. For a better understanding of the depositional geometry of these turbidities, the paleogeomorphology analysis demonstrated to be quite efficient. The method of work used for so was a combination among the seismic 3D visualization (VoxelGeo{sup R}), from the characterization of different physical attributes of the seismic signal, and the facies analysis of wells profiles of the referred field. The developed analysis allowed the individualization and the three-dimensional visualization of a sinuous paleochannel in the top of the interval, until then not described in previous interpretations of this depositional system. With the information coming from this study, a better understanding of the genesis of this accumulation can be reached, especially in the part regarding to the units of important economic character, represented by the turbidities deposits and whose occurrences are related with stages of relative lowering of the sea level. (author)

  8. Digital model of the seabed geomorphology of southern-central Espirito Santo basin and northern Campos basin; Modelo digital da geomorfologia do fundo oceanico do centro-sul da bacia do Espirito Santo e norte da bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Schreiner, Simone; Souza, Mariana Beatriz Ferraz Mendonca de; Migliorelli, Joana Paiva Robalo [Petroleo Brasileiro S. A. (PETROBRAS), Rio de Janeiro, RJ (Brazil). Unidade de Servicos de Exploracao e Producao], Emails: schreiner@petrobras.com.br, mbfms.fototerra@petrobras.com.br, joanamigli.fototerra@petrobras.com.br

    2009-05-15

    That communication brings the result of a bathymetric mosaic of converted in a digital model of the ocean topography, consisting of 17 seismic projects 3D, besides 17 multibeam bathymetry surveys of South-Central Espirito Santo Basin and Northern Campos Basin.

  9. Results of the marine biota monitoring during drilling activity on Campos Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Petta, Claudia Brigagao de; Bastos, Fabio; Danielski, Monica; Ferreira, Mariana; Gama, Mariana; Coelho, Ana Paula Athanazio; Maia, Decio [Aecom do Brasil Ltda, Rio de Janeiro, RJ (Brazil)

    2012-07-01

    The Environmental Monitoring Project (PMA) aims to report environmental changes arising from drilling activity, in relation to the marine fauna. This project can also help in the monitoring of accidental spills. Since the professionals spend six hours of the day monitoring the ocean around the rigs, they can locate and identify oil stains, notify the responsible onboard, and also help in the monitoring of the oil stain. Such Project has been developed onboard a drilling unit working in Campos Basin. The results presented here were collected during the drilling activity in Bijupira and Salema fields, by Shell Brasil Petroleo Ltda, from July 13th to October 8th, 2011.

  10. Oil pipelines inspection with high wall thickness using MFL tool - Campos Basin experience; Inspecao de oleoduto com paredes espessas com ferramenta MFL - a experiencia da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Franzoi, Aldo; Camerini, Claudio; Bueno, Sergio I.O. [PETROBRAS, Rio de Janeiro, RJ (Brazil); Franca, Andre; Miranda, Ivan V. Janvrot; Silva, Jose A.P.; Lima, Vinicius [PipeWay Engenharia, Rio de Janeiro, RJ (Brazil)

    2005-07-01

    Campos Basin deep water pipelines are designed to out stand internal pressure, launching loads and buckling witch demands high wall thickness up to 1 inch. On the other hand, operational conditions require high pumping temperatures to meet requirements of flow assurance. This scenario becomes difficult internal survey specially MFL tools. The present work describes PETROBRAS effort, with PipeWay partnership, looking for alternatives for internal inspection on those pipelines using MFL specially designed, showing details and results from a recent survey. (author)

  11. Consequences of artificial deepwater ventilation in the Bornholm Basin for oxygen conditions, cod reproduction and benthic biomass - a model study

    Science.gov (United States)

    Stigebrandt, A.; Rosenberg, R.; Råman Vinnå, L.; Ödalen, M.

    2015-01-01

    We develop and use a circulation model to estimate hydrographical and ecological changes in the isolated basin water of the Bornholm Basin. By pumping well-oxygenated so-called winter water to the greatest depth, where it is forced to mix with the resident water, the rate of deepwater density reduction increases as well as the frequency of intrusions of new oxygen-rich deepwater. We show that pumping 1000 m3 s-1 should increase the rates of water exchange and oxygen supply by 2.5 and 3 times, respectively. The CRV (cod reproduction volume), the volume of water in the isolated basin meeting the requirements for successful cod reproduction (S > 11, O2 > 2 mL L-1), should every year be greater than 54 km3, which is an immense improvement, since it has been much less in certain years. Anoxic bottoms should no longer occur in the basin, and hypoxic events will become rare. This should permit extensive colonization of fauna on the earlier periodically anoxic bottoms. Increased biomass of benthic fauna should also mean increased food supply to economically valuable demersal fish like cod and flatfish. In addition, re-oxygenation of the sediments should lead to increased phosphorus retention by the sediments.

  12. Tectonic inheritage from adjacent basement, north of the Campos Basin; Heranca tectonica no embasamento adjacente no norte da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Ferroni, Felipe R. [Universidade Estadual Paulista (UNESP), Rio Claro, SP (Brazil); Castro, Joel C. de [Universidade Estadual Paulista (UNESP), Rio Claro, SP (Brazil). Inst. de Geociencias e Ciencias Exatas. Dept. de Geologia Aplicada; Souza, Iata A. de; Castro, Joel C. de [Universidade Estadual Paulista (UNESP), Rio Claro, SP (Brazil). Inst. de Geociencias e Ciencias Exatas

    2008-07-01

    The evolution of the Atlantic Brazilian basins is a target of researches since the firth discovery of oil deposits. With the advance of the geophysical methods the understanding of the structures in depth became possible. The objective of this paper is to determine if the adjacent basement in the north of Campos Basin has significant influence in the identification of areas that can contain hydrocarbons. Therefore, lineaments had been extracted with SRTM images of continental basement and the main alignment was correlated with gravimetric anomalies map and seismic data. Eight levels on seismic data had been interpreted (basement, top rift, shallow water Albian, Albian, mid-Oligocene and mid-Miocene). In all levels were identified a fault normal system, which cut sediments since basement until the Recent. The main direction of the basement is NE-SW, and the alignments formed for basin basement faults coincide with this direction, what indicates that the system is active and also genetically related. (author)

  13. Experiences of nonrecognition among offshore workers in the Campos basin: an approach based on Axel Honneth

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    Adelia Maria Miglievich Ribeiro

    2011-11-01

    Full Text Available Our research focused on a specific group of workers – those employed in the petroleum industry in the Campos Basin (RJ by Petrobrás – and service providers. Their interviews provide empirical material for a possible new approach to the offshore workers’ environment based on some issues raised by Axel Honneth, current Critical Theory’s exponent, such as the experience of disrespect, moral feelings of indignation, and his articulation in search for solutions to configure or not a struggle for recognition. We attest the analytical potential of the Honnethian premises in guiding empirical investigations which may lead to the review of the production relationship as a space to experience the claim for its humanization within advanced capitalism, in which the tendency to individualistic and conformist solutions prevail as they are triggered by the concurrent work precariousness.

  14. Hamacantha (Hamacantha) boomerang sp. nov. from deep-sea coral mounds at Campos Basin, SW Atlantic, and redescription of H. (H.) schmidtii (Carter, 1882) (Hamacanthidae, Poecilosclerida, Demospongiae).

    Science.gov (United States)

    Hajdu, Eduardo; Castello-Branco, Cristiana

    2014-01-08

    There are 22 species of Hamacantha registered from all over the world, and frequently from deep-waters, only two of which had previously been reported from the SW Atlantic. Here we describe a third species for this area, Hamacantha (H.) boomerang sp. nov., collected from deep-sea coral mounds at Campos Basin (off Rio de Janeiro state). We found oxeas 271-630 µm long, diancistras in three size classes, 125-155, 45-69 and 20-29 µm, and toxas, 58-82 µm. This is the only Hamacantha combining oxeas and toxas, but the latter are very rare. The species approaches the Caribbean H. (H.) schmidtii (Carter, 1882), where we observed oxeas 390-495 µm long, and diancistras in three size classes, 109-124,  44-54 and 26-41 μm, however toxas appear to be absent. Both species are clearly distinct by micrometric values, as well as the overall morphology of the smaller diancistras, distinct from the intermediate category in the new species, but quite similar in H. (H.) schmidtii. Hamacantha (Vomerula) falcula approaches the new species very closely in microsclere dimensions and morphology, but is set apart by its styloid and smaller megascleres.

  15. Sediment compaction and pore pressure prediction in deepwater basin of the South China Sea: Estimation from ODP and IODP drilling well data

    Science.gov (United States)

    Xie, Yangbing; Wu, Tuoyu; Sun, Jin; Zhang, Hanyu; Wang, Jiliang; Gao, Jinwei; Chen, Chuanxu

    2018-02-01

    Overpressure in deepwater basins not only causes serious soft sediment deformation, but also significantly affects the safety of drilling operations. Therefore, prediction of overpressure in sediments has become an important task in deepwater oil exploration and development. In this study, we analyze the drilling data from ODP Leg 184 Sites 1144, 1146, and 1148, and IODP Leg 349 Sites U1431, U1432, U1433, and U1435 to study the sediment compaction and controls in the northern South China Sea. Sedimentation rate, sediment content, distribution area, and buried depth are the factors that influence sediment compaction in the deepwater basin of the South China Sea. Among these factors, the sediment content is the most important. The fitted normal compacted coefficients and mudline porosity for an interval of 50 m shows disciplinary variation versus depth. The pore pressure predicted from different fitted results shows varying overpressure situations. The normal compaction trend from Site 1144 reflects the porosity variation trend in stable deposition basins in the northern South China Sea. The predicted pore pressure shows overpressure at Site 1144, which is attributed to compaction disequilibrium. Nevertheless, the mixed lithology column may influence the predicted over-pressure at Site 1148, which is responsible for the confusing result. Above all, we find that sediment compaction should serve as a proxy for pore pressure in the deepwater basin of the South China Sea.

  16. Evaluation of abundant hydrocarbon-generation depressions in the deepwater area of Qiongdongnan Basin, South China Sea

    Institute of Scientific and Technical Information of China (English)

    LIU Zhen; SUN Zhipeng; WANG Zisong; ZHANG Wei; LI Tingan; HE Weijun; LI Fengxia

    2016-01-01

    It has been confirmed that the key source rocks of Qiongdongnan Basin are associated with the Yacheng Formation, which was deposited in a transitional marine-continental environment. Because the distribution and evolution patterns of the source rocks in the major depressions are different, it is important to determine the most abundant hydrocarbon-generation depressions in terms of exploration effectiveness. Based on an analysis of organic matter characteristics of the source rocks, in combination with drilling data and seismic data, this paper establishes a model to evaluate the hydrocarbon-generation depressions in the deepwater area of Qiongdongnan Basin. First of all, by using the method of seismic-facies model analysis, the distribution of sedimentary facies was determined. Then, the sedimentary facies were correlated with the organic facies, and the distribution of organic facies was predicted. Meanwhile, the thickness of source rocks for all the depressions was calculated on the basis of a quantitative analysis of seismic velocity and lithology. The relationship between mudstone porosity and vitrinite reflectance (Ro) was used to predict the maturity of source rocks. Second, using the parameters such as thickness and maturity of source rocks, the quantity and intensity of gas generation for Yacheng and Lingshui Formations were calculated. Finally, in combination with the identified hydrocarbon resources, the quantity and intensity of gas generation were used as a guide to establish an evaluation standard for hydrocarbon-generation depressions, which was optimized for the main depressions in the Central Depression Belt. It is proposed that Lingshui, Ledong, Baodao and Changchang Depressions are the most abundant hydrocarbon depressions, whilst Songnan and Beijiao Depressions are rich hydrocarbon depressions. Such an evaluation procedure is beneficial to the next stage of exploration in the deep-water area of Qiongdongnan Basin.

  17. Energetic aspects and opportunities for reusing water on offshore platforms in Campos Basin, Brazil

    Directory of Open Access Journals (Sweden)

    Victor Magalhães Duarte

    2017-09-01

    Full Text Available In the drilling and production of oil at sea, a large quantity of potable water used is most commonly transported to oil platforms using offshore supply vessels (OSVs. Sea water desalination is used as well, but only in a few oil platforms. To minimize energy consumption, water supply options were studied. The desalination of seawater and the reusing of streams of grey water and black water were evaluated and compared with the characteristics of the current supply via OSVs. In both desalination and OSV water supply options an electrolytic wastewater treatment plant is used. The objective of this study was to analyze the current situation regarding water supply on offshore platforms located in the Campos Basin, Rio de Janeiro, Brazil, and to propose measures to take advantage of opportunities to reuse water and reduce energy expenditure. Two alternative scenarios were developed that involved the reuse of water that comes from the effluent of a biological wastewater treatment plant (WWTP. Information on the logistics of supplying water to platforms was obtained through direct consultation with companies and sources in the literature. The results show that annual energy consumption (uptake, treatment, transportation, use and waste water treatment of water on offshore platforms is currently 1.89 GWh, and that a reduction of 1.8 GWh of the energy consumed can be achieved using advanced reuse treatments. Energy consumption in the water reuse treatment is more competitive than those of transport by OSVs or seawater desalination.

  18. Project finance in Campos Basin; O 'Project Finance' na auto-suficiencia

    Energy Technology Data Exchange (ETDEWEB)

    D' Almeida, Albino Lopes; Mendonca, Roberto Wagner [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The present conquest of the self-sufficiency is a result of 3 decades of investments that started with the discovery of the well 1-RJS-9A in 1974. The second leap was the discovery of giant fields in the 1980 including Marlim (1984) and Albacora (1985) among others. This first two conquests were basically technical and were recognized by the OTC in 1991 and 2000. The third leap was the utilization of project finance structures. We examine the role of project finance in the main projects developed by the PETROBRAS E and P - Exploration and Production - segment in the Campos Basin region. These projects allowed PB to invest more than US$ 6 billion dollars in a five year interval increasing production in 12 oil fields by 75% in a 7 years interval which later enabled PB to be self-sufficient in oil production. The financial structures of Albacora, Barracuda, EVM and Marlim are shown and discussed in various aspects which including structure, schedule, conditionalities, warranties, management of the SPEs and relationship with international agencies. Considering the present quest of developing Tupi and Jupiter which might represent investments around US$ 80 billion and it's impacts to the PETROBRAS capital structure and risk this might be a useful discussion. (author)

  19. [Work-related accidents on oil drilling platforms in the Campos Basin, Rio de Janeiro, Brazil].

    Science.gov (United States)

    Freitas, C M; Souza, C A; Machado, J M; Porto, M F

    2001-01-01

    The offshore oil industry is characterized by complex systems in relation to technology and organization of work. Working conditions are hazardous, resulting in accidents and even occasional full-scale catastrophes. This article is the result of a study on work-related accidents in the offshore platforms in the Campos Basin, Rio de Janeiro State. The primary objective was to provide technical back-up for both workers' representative organizations and public authorities. As a methodology, we attempt to go beyond the immediate causes of accidents and emphasize underlying causes related to organizational and managerial aspects. The sources were used in such a way as to permit classification in relation to the type of incident, technological system, operation, and immediate and underlying causes. The results show the aggravation of safety conditions and the immediate need for public authorities and the offshore oil industry in Brazil to change the methods used to investigate accidents in order to identify the main causes in the organizational and managerial structure of companies.

  20. PETROBRAS and social responsibility: the artificial reefs project in Campos Basin, Brazil; PETROBRAS e responsabilidade social: a instalacao de recifes artificiais na Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Cortegiano, Adriana de Santa Marinha Pastorino de Almeida

    2004-07-01

    This article focus on an innovative project launched by PETROBRAS with the main purpose of minimizing the impacts of drilling activities in Campos Basin, over the fishery industry in the northeast region of Rio de Janeiro. This project is seen as a relevant part of PETROBRAS' corporate social responsibility actions. In this sense, it is supposed to consider the interests of all parts directly and indirectly related and affected by the companies' intervention. The major conclusion is that the project could be an important first step to restructure the fishery sector an to harmonize the 'sea users'. A potential improvement could be the promotion of a more effective participation of fishermen in the project and the inclusion of the social and environmental dimensions. (author)

  1. Application of MSS/LANDSAT images to the structural study of recent sedimentary areas: Campos Sedimentary Basin, Rio de Janeiro, Brazil

    Science.gov (United States)

    Parada, N. D. J. (Principal Investigator); Barbosa, M. P.

    1983-01-01

    Visual and computer aided interpretation of MSS/LANDSAT data identified linear and circular features which represent the ""reflexes'' of the crystalline basement structures in the Cenozoic sediments of the emergent part of the Campos Sedimentary Basin.

  2. Event sedimentation in low-latitude deep-water carbonate basins, Anegada passage, northeast Caribbean

    Science.gov (United States)

    Chaytor, Jason D.; ten Brink, Uri S.

    2015-01-01

    The Virgin Islands and Whiting basins in the Northeast Caribbean are deep, structurally controlled depocentres partially bound by shallow-water carbonate platforms. Closed basins such as these are thought to document earthquake and hurricane events through the accumulation of event layers such as debris flow and turbidity current deposits and the internal deformation of deposited material. Event layers in the Virgin Islands and Whiting basins are predominantly thin and discontinuous, containing varying amounts of reef- and slope-derived material. Three turbidites/sandy intervals in the upper 2 m of sediment in the eastern Virgin Islands Basin were deposited between ca. 2000 and 13 600 years ago, but do not extend across the basin. In the central and western Virgin Islands Basin, a structureless clay-rich interval is interpreted to be a unifite. Within the Whiting Basin, several discontinuous turbidites and other sand-rich intervals are primarily deposited in base of slope fans. The youngest of these turbidites is ca. 2600 years old. Sediment accumulation in these basins is low (−1) for basin adjacent to carbonate platform, possibly due to limited sediment input during highstand sea-level conditions, sediment trapping and/or cohesive basin walls. We find no evidence of recent sediment transport (turbidites or debris flows) or sediment deformation that can be attributed to the ca. M7.2 1867 Virgin Islands earthquake whose epicentre was located on the north wall of the Virgin Islands Basin or to recent hurricanes that have impacted the region. The lack of significant appreciable pebble or greater size carbonate material in any of the available cores suggests that submarine landslide and basin-wide blocky debris flows have not been a significant mechanism of basin margin modification in the last several thousand years. Thus, basins such as those described here may be poor recorders of past natural hazards, but may provide a long-term record of past oceanographic

  3. Large-scale deep-water seafloor mapping from the Rockall to the Hatton basins, NE Atlantic

    Science.gov (United States)

    Monteys, X.; Thébaudeau, B.; Murcia, C.; Duncan, N.

    2016-02-01

    Multibeam data acquired in 2000 and 2001 during the Irish National Seabed Survey (INSS) are used for the first detailed investigation of the seabed geomorphology and sediment type in the Hatton-Rockall basin area of the North East Atlantic Ocean, covering an area of approximately 80,000 km². The original multibeam survey produced bathymetric and backscatter datasets that allowed the creation of a Digital Terrain Models of approximately 50 m in resolution in water depths between 500 and 3500 m. Near-surface sediments for the entire region haven been classified using features derived from multibeam angular backscatter data (12kHz) and robust unsupervised clustering techniques. Additionally, sub bottom data imaging the shallow stratigraphy and geomagnetic measurements collected at the time of the MBES survey are combined to further characterise some of the features identified. The features presented in detail include parts of the Hatton and Gardar contourite drifts, volcanic mounds identified by their morphology and magnetic signature, deep-water coral mounds, iceberg scours as well as canyons, gullies and escarpments along and down the slopes of the banks and mounds. This study highlights for the first time the variety and complexity of the seafloor present at the seabed in the Irish Hatton-Rockall basin area

  4. Green line fracturing systems fluids in Campos Basin, Brazil; Sistemas de fluidos de fraturamento na Bacia de Campos: evolucao em beneficio do meio ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Alexandre B. de; Araujo, Cosme J.C. de; Martinho, Flavio M.; Gaspar, Fernando [BJ Services do Brasil, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The constant demand for Services Companies in Oil and Gas Industry to reduce the environmental impacts has led to a race in search of new cleaner technologies. Fluids with low toxicity are the target of research and development by the companies which are committed to ensure the aspects of quality, health, safety and environment from manufacturing up to the use in the final destination of these products. The replacement of these fluids is happening at a larger speed than in the past on the based in two factors: greater awareness on the part of these companies in relation to the environmental and by new environmental laws. The fluids systems used in fracturing operations are not an exception to this rule. Service companies today are in the process of replacing their formulations with systems less aggressive to the environment so-called 'green' systems. In this context the new technological developments of fracturing fluids are of fundamental importance to assist the new environmental requirements of both operators and government regulatory bodies and also to ensure better effectiveness of these products. This paper reports the research, development and application of new environmentally acceptable fracturing fluids technology, reviews the pioneering case histories in offshore operations and the benefits experienced in the Campos Basin - Brazil. (author)

  5. Mercury in sediments from shelf and continental slope at Campos Basin near Rio de Janeiro, Brazil

    Science.gov (United States)

    Araujo, Beatriz; Hintelmann, Holger; Dimock, Brian; Gomes de Almeida, Marcelo; Falcão, Ana Paula; de Rezende, Carlos Eduardo

    2016-04-01

    Mercury (Hg) is a global pollutant due to its ability to undergo long-range transport from source regions to remote parts of the world, and its ubiquitous presence in aquatic ecosystems. The Hg isotope ratios could be an effective tool for tracing the sources and process of Hg in the environment. This study aimed to establish the distribution of mercury in surface sediments of three transects (25- 3000m water depth) in continental shelf and slope in Campos Basin-RJ-Brazil, using the Hg isotopes to understand the geochemical processes relating to Hg cycling that occur in a subtropical coastal environment. The study area was divided into three transects: A (located to the south and close to a upwelling area), D (located opposite the mouth of the Paraiba do Sul River) and I (located north near the top of Vitória-ES). Sampling isobaths were 25, 50, 75, 100, 150, 400, 700, 1000, 1300, 1900, 2500 and 3000m. The Total Hg, MMHg and Hg stable isotopes were determined based on EPA Method 1631, EPA method 1630 and Foucher and Hintelmann (2006), respectively. The silt/clay ranged from 0.05 to 95%, and the organic carbon (OC) from 0.07 to 1.43 % for all transects. THg and MMHg concentrations in the shelf were 11.9 ± 7.2 (1.7- 22.2) ng.g-1 and 0.15 ± 0.12 (0.02 - 0.40) ng.g-1; in the slope 30.3 ± 9.2 (11.6 - 51.6) ng.g-1 and 0.13 ± 0.06 (0.03 -0.29) ng.g-1 , respectively. The δ202Hg and Δ199Hg varied from -0.32 to -1.85 ‰ (-0.79 ± 0.44‰) and -0.41 to 0.09 ‰ (-0.03 ± 0.12 ‰) for all transects, respectively. The delta values between both regions are significantly different, the shelf region showed δ202Hg from -0.59 to -2.19 ‰ (mean: -1.52 ±0.65) and Δ199Hg from - 0.53 to 0.08 ‰ (mean: -0.27 ±0.55) and the slope region were observed δ202Hg values from -0.32 to -1.82 ‰ (mean: -0.73 ±0.39 ‰ n=18) and gΔ199Hg from -0.23 to 0.09‰ (mean: -0.02 ±0.08‰ n=5). The slope appears to be enriched with heavier isotopes compared to the shelf, however, in the

  6. Geometry of the proximal part of the modern turbidite depositional system of the Carapebus Formation, Campos Basin: a model for reservoir heterogeneities; Geometria da porcao proximal do sistema deposicional turbiditico moderno da Formacao Carapebus, Bacia de Campos; modelo para heterogeneidades de reservatorio

    Energy Technology Data Exchange (ETDEWEB)

    Machado, Luis Claudio Ribeiro; Kowsmann, Renato Oscar; Almeida Junior, Waldemar de; Murakami, Celso Yoshihito; Schreiner, Simone; Miller, Dennis James; Piauilino, Pedro Orlando Vasconcelos [PETROBRAS, Rio de Janeiro, RJ (Brazil). Exploracao e Producao. Unidade de Servico Submarino]. E-mail: machadolc@petrobras.com.br

    2004-11-01

    The deep-water marine sedimentary environment of the Cenozoic of the Campos Basin is examined at the modern sea floor, where it can be better understood. This environment is responsible for the genesis of the turbidite systems of the Carapebus Formation, the reservoirs that hold more than 90% of Brazil's petroleum reserves. The study was developed with the records of regional side-scan sonar, swath bathymetry, sub-bottom profiler data, standard multichannel 3D seismic surveys and piston cores covering almost the entire basin. After leaving the Almirante Camara Canyon, the turbiditic flows erode the muddy debris apron surrounding the continental slope and begin to deposit thick layers of clean sand into a big trough in water depths of 1800 m to 3000 m. The trough is 3.5 km wide, 150 m deep, 150 km long, and is formed by a chain of salt withdrawal mini-basins. In some places the sea floor is flat enough to develop today a depositional lobe, in all aspects analogous to the best, geologically ancient petroleum reservoirs in the basin. Aspects of the system: 1) the arcosean sands are brought by the river, cross the shelf, the incised valley, the canyon, and deposit as turbidites - they do not originate from a collapse of the continental slope; 2) a wide muddy debris apron surrounds the continental slope (slope apron), and represents a huge volume of sediment in the Campos Basin ; 3) the turbidites do not develop a submarine fan, but are deposited in an elongated trough formed by salt tectonics; 4) the turbidite beds, both in the lobe or in the trough, are not deposited during a single episode, but in multiple events over significant geologic time in which small channels which brought the turbidites avulse and meander along the entire depositional area, building a single amalgamated bed; 5) classic channel-levees are not present because this system comprises a sandy braid plain and the levees are as sandy as the channel; 6) a hierarchical depositional model for bulb

  7. Pipeline integrity evaluation: 10 years experience at Campos basin; Avaliacao de integridade de dutos submarinos de transferencia: 10 anos de atividades na Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Bueno, Sergio Ibaje Oliveira; Franzoi, Aldo Renato [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2005-07-01

    PETROBRAS E and P department (up-stream segment) had assigned first contract for pipeline inspection using smart pigs in 1995. Up to this time only TRANSPETRO (down-stream segment) had an experience with those inspections mainly focused on first generation tools. On this contract, it was first time required high resolution tools, which had bigger defect detection capability and sizing accuracy as advantages but with higher cost. It was regarded necessary due to high costs involved on a virtual sub sea survey or repair. The investment was regarded fair as there is no way to establish correlation digs as well as normally done after on shore pipelines surveys. Actually the first internal inspection was carried out in 1997. From this period it has been realized the enormous importance on verifying all platforms installations and all procedures involving cleaning runs. We have taken many lessons from these inspections. Commissioning using all kinds of cleaning pigs (some was invented) that could be specially contracted on scaling removing jobs; diesel batch to make easy US pigs inspection, cleaning steps that should be gradual to allow receiving of debris without disturbing platforms process efficiency; special tools designed in-house to meet some specific installations requirements as limited pigability; were some issues that demanded efforts on this period. PETROBRAS/E and P through its Campos Basin Production Unit has been strongly involved on looking for solutions to keep its sub sea pipeline net integrity; a strategic asset that will guarantee the Brazilian development on oil and gas production. (author)

  8. Impacts of production of hydrocarbons in Campos Basin: missing or not detected; Impactos da producao de hidrocarbonetos na Bacia de Campos: ausentes ou nao detectados

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Carolina E. [Instituto Brasileiro de Meio Ambiente e Recursos Naturais Renovaveis (CGPEG/DILIC/IBAMA), Rio de Janeiro, RJ (Brazil). Coordenacao Geral de Petroleo e Gas. Diretoria de Licenciamento; Gama, Bernardo A. Perez da [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2012-07-01

    According to the Brazilian legislation, the Environmental Impacts Monitoring Plan is one of the requirements of the environmental licensing to offshore oil and gas production activities. The Monitoring Plan's structure is based upon sampling and evaluation of numerous parameter settings in water and sediment compartments, while the conclusion as to the existence or absence of impact is obtained after statistical analysis of the results. The aim of this work was to evaluate the methodological adequacy of monitoring and to calculate the statistical power of tests applied with the purpose to determine the reliability of their findings. Experiences in other countries like Australia have shown that this is an important instrument in preparing an effective environmental study regarding the detection of impacts. In Brazil, this is the first initiative to critically evaluate the results of reports of environmental monitoring originated from the licensing of hydrocarbons production activities. Campaign reports forwarded to the environmental agency in charge, i.e., the Brazilian Institute of Environment and Renewable Natural Resources (IBAMA), and the selected ventures are located in the Campos Basin and have different operating companies. The results were both relevant and concerning. All monitoring reports confirmed the absence of alterations or impacts on the biotic media for sediment compartments, but the greater statistical power did not exceed 25% for a great magnitude impact. Thus it was concluded that if the oil production activity has caused alterations or impacts to bentonic organisms, the carried out monitoring was inefficient to detect them even if they were of great magnitude. This analysis is expected to be an instrument for future changes in environmental licensing procedures e for the improvement of the environmental public management in Brazil. (author)

  9. Modeling and identification of new complementary development opportunities in a Campos Basin offshore giant field; Modelagem e identificacao de novas oportunidades de desenvolvimento complementar de um campo gigante na Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Jose Adilson T.; Steagall, Daniel E.; Lorenzatto, Rudimar Andreis [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    The objective of this paper is to present the methodology that has been used for the complementary development of the giant Marlin oil field in the Campos Basin, with the study of the opportunities of new wells and application of new technologies for the enhancement of production, recovery factor and the gain of reserves. This methodology is applied integrating geophysics, geology, engineering, planning and operation, containing: identification of the non drained areas, positioning of new locations, risk analysis, reduction risk analysis actions, production estimation, attractive location selection; conceptual well project with location of the well head, submarine layout, drilling program, multiphase flow curves; drilling schedule, completion, and production commencement; production forecasting with flux simulation using operational reality of the oil, gas, and water treatment production capacity; wells substitution and deviation criteria; project critical resources and preliminary economical evaluation including project risk. The obtained results were the optimization of the project portfolio of new wells considering the identification of new opportunities, schedule and entrance order of wells, helping also in the acquisitions of new data for reservoir risk reduction before project implementation. (author)

  10. Analysis of the influence of the Colatina Belt in the Campos and Espirito Santo Basins-Brazil; Analise da influencia da Faixa Colatina nas Bacias de Campos e Espirito Santo

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Gustavo Henrique Teixeira da; Simoes, Luiz Sergio Amarante; Souza, Iata Anderson de [Universidade Estadual Paulista (UNESP), Rio Claro, SP (Brazil). Inst. de Geociencias e Ciencias Exatas

    2008-07-01

    Recent discoveries in the Espirito Santo Basin confirm the importance of it in the national exploratory scenery (oil and gas production). The new fields like Carapo and Camarupim, beyond others, next to already known Golfinho and Canapu, totalize an addition of 560 million barrels. In this way, studies in the area add importance, as the case of the present research, where if it looked to analyze the influence of Colatina Belt in Espirito Santo Basin and secondarily in Campos Basin. The results had been gotten through the integration of diverse data, such as lineaments extracted from images SRTM, potential maps and analyze of seismic lines. It was concluded that the Colatina Belt if projects for the interior of the basins, but that the same one seems to be dislocated in relation to the direct projection of the continental features, being that its influence can be felt with bigger emphasis in the Campos Basin, while in the Espirito Santo it look like to have low importance with regard to the exploration aspects. Also it was verified the presence of numerous halo kinetic structures that affect all the mapped horizons, this element determine great importance in the generation of structural traps. (author)

  11. Diagenesis and reservoir quality evolution of palaeocene deep-water, marine sandstones, the Shetland-Faroes Basin, British continental shelf

    Energy Technology Data Exchange (ETDEWEB)

    Mansurbeg, H. [Department of Earth Sciences, Uppsala University, Villavaegen 16, SE 752 36 Uppsala (Sweden); Morad, S. [Department of Earth Sciences, Uppsala University, Villavaegen 16, SE 752 36 Uppsala (Sweden); Department of Petroleum Geosciences, The Petroleum Institute, P.O. Box 2533, Abu Dhabi (United Arab Emirates); Salem, A. [Faculty of Education at Kafr El-Sheikh, Tanta University, Kafr El-Sheikh (Egypt); Marfil, R.; Caja, M.A. [Departmento Petrologia y Geoquimica, Facultad de Geologia, UCM, 28040 Madrid (Spain); El-ghali, M.A.K. (Geology Department, Al-Fateh University, P.O. Box 13696, Libya); Nystuen, J.P. [Department of Geosciences, University of Oslo, P.O. Box 1047 Blindern, NO-0316 Oslo (Norway); Amorosi, A. [Department of Earth Sciences, University of Bologna, Via Zamboni 67, 40127 Bologna (Italy); Garcia, D. [Centre SPIN, Department GENERIC, Ecole Nationale Superieure des Mines de Saint Etienne 158, Cours Fauriel 42023, Saint-Etienne (France); La Iglesia, A. [Instituto de Geologia Economica (CSIC-UCM), Facultad de Geologia, UCM, 28040 Madrid (Spain)

    2008-06-15

    The Palaeocene, deep-water marine sandstones recovered from six wells in the Shetland-Faroes Basin represent lowstand, transgressive and highstand systems tract turbiditic sediments. Mineralogic, petrographic, and geochemical analyses of these siliciclastics are used to decipher and discuss the diagenetic alterations and subsequent reservoir quality evolution. The Middle-Upper Palaeocene sandstones (subarkoses to arkoses) from the Shetland-Faroes Basin, British continental shelf are submarine turbiditic deposits that are cemented predominantly by carbonates, quartz and clay minerals. Carbonate cements (intergranular and grain replacive calcite, siderite, ferroan dolomite and ankerite) are of eogenetic and mesogenetic origins. The eogenetic alterations have been mediated by marine, meteoric and mixed marine/meteoric porewaters and resulted mainly in the precipitation of calcite ({delta}{sup 18}O{sub V-PDB}=-10.9 permille and -3.8 permille), trace amounts of non-ferroan dolomite, siderite ({delta}{sup 18}O{sub V-PDB}=-14.4 permille to -0.6 permille), as well as smectite and kaolinite in the lowstand systems tract (LST) and highstand systems tract (HST) turbiditic sandstone below the sequence boundary. Minor eogenetic siderite has precipitated between expanded and kaolinitized micas, primarily biotite. The mesogenetic alterations are interpreted to have been mediated by evolved marine porewaters and resulted in the precipitation of calcite ({delta}{sup 18}O{sub V-PDB}=-12.9 permille to -7.8 permille) and Fe-dolomite/ankerite ({delta}{sup 18}O{sub V-PDB}=-12.1 permille to -6.3 permille) at temperatures of 50-140 and 60-140 C, respectively. Quartz overgrowths and outgrowth, which post- and pre-date the mesogenetic carbonate cements is more common in the LST and TST of distal turbiditic sandstone. Discrete quartz cement, which is closely associated with illite and chlorite, is the final diagenetic phase. The clay minerals include intergranular and grain replacive

  12. Along-dip variations of structural style in the Somali Basin deep-water fold and thrust belt (East Africa)

    Science.gov (United States)

    Cruciani, Francesco; Rinaldo Barchi, Massimiliano

    2014-05-01

    Continental passive margins are place of extended slope-failure phenomena, which can lead to the formation of gravity-driven deep-water fold and thrust belts (DW-FTBs), in regions where no far-field compressional stress is active. These giant geological features, which are confined to the sedimentary section, consist of extensional-compressional linked systems detached over a common décollement, generally salt or shales. The continental passive margin of northern Kenya and southern Somalia is an excellent and relatively unexplored site for recognizing and understanding the DW-FTBs originated over a regional shale décollement. In this study we have interpreted a 2D seismic data-set of the 1980s, hosted by Marine Geoscience Data System at Lamont-Doherty Earth Observatory of Columbia University (http://www.marine-geo.org), and recently reprocessed by ENI, in order to investigate the structural style of a DW-FTB developed offshore of northern Kenya and southern Somalia (Somali Basin). This region records the oldest sedimentary section of the Indian Ocean since the breakup of Gondwana began in the Middle-Lower Jurassic separating Madagascar from Africa. From the Upper Cretaceous to at least the Lower Miocene, the margin has been characterized by gravitational collapse leading to the formation of a DW-FTB extending more than 400 km along-strike. The northern portion of the DW-FTB is about 150 km wide, whilst in the southern portion is few tens of km wide. We analysed the northern portion along a regional seismic section. Our study represents the first detailed structural interpretation of this DW-FTB since its discovery in the 1980s. The good quality of the available reprocessed seismic data has allowed us to identify remarkable along-dip variations in the structural style. The basal detachment constantly deepens landward, in agreement with a prevailing gravity-spreading deformation process (as in the case of the Niger Delta). On the seismic data are not visible, as

  13. Sedimentology and sequence stratigraphy from outcrops of the Kribi-Campo sub-basin: Lower Mundeck Formation (Lower Cretaceous, southern Cameroon)

    Science.gov (United States)

    Ntamak-Nida, Marie Joseph; Bourquin, Sylvie; Makong, Jean-Claude; Baudin, François; Mpesse, Jean Engelbert; Ngouem, Christophe Itjoko; Komguem, Paul Bertrand; Abolo, Guy Martin

    2010-08-01

    The Kribi-Campo sub-basin is composed of an Early to Mid Cretaceous series from West Africa's Atlantic coast and is located in southern Cameroon in the Central African equatorial rain forest. It is the smallest coastal basin in Cameroon and forms the southern part of the Douala/Kribi-Campo basin known as Douala basin ( s.l.). Until now, no detailed sedimentological studies have been carried out on the outcrops of this basin located in the Campo area. The aim of this study was to characterise the depositional environments, vertical evolution and tectonic context of these Lower Cretaceous series in order to make a comparison with adjacent basins and replace them in the geodynamic context. Facies analysis of the Lower Mundeck Formation (Lower Cretaceous) indicates the presence of four major, interfigered facies associations, that are inferred to represent elements of an alluvial to lacustrine-fan delta system. The clast lithologies suggest proximity of relief supplying coarse-grained sediment during the deposition of the Lower Mundeck Formation at Campo. The general dip and direction of the bedding is approximately 10°-12°NW, which also corresponds to the orientation of the foliations in the underlying metamorphic basement. The main sedimentary succession is characterised by a major retrogradational/progradational cycle of Late Aptian age, evaluated at about 3 Ma, with a well-developed progradational trend characterised by fluctuations of the recognised depositional environments. Fluctuations in lake level and sediment supply were possibly controlled by active faults at the basin margin, although climatic changes may have also played a role. The consistently W-WNW palaeoflow of sediments suggests that the palaeorelief was located to the east and could be oriented in a NNE-SSW direction, downthrown to the west. Local outcrops dated as Albian, both north and south of the main outcrop, display some marine influence. These deposits are cut by 040-060 faults parallel to

  14. Sonic profile simulation from the profiles of gamma ray and resistivity in the wells from Campos Basin

    International Nuclear Information System (INIS)

    Leite, Marcos; Carrasquilla, Abel; Silva, Jadir da

    2008-01-01

    The knowledge of the mechanical properties of the rocks is essential in the calculation of the stability of the oil wells and in the elaboration of drilling projects, because they help in the selection of the best equipment for each geologic scene. In these activities, the most important mechanical property is the rock compressibility, which can be calculated from the sonic geophysical log, but this one, not always available in the well data set. In order to minimize this limitation, it was developed, in this work, a methodology to simulate it through an algorithm that utilizes fuzzy logic concepts, using as input data gamma ray and resistivity logs. The basic principle of this methodology is to propose that any geophysical log, including the sonic log, can be considered function of other measured geophysical logs in the same depths. On the other hand, to test the confidence of this approach, it was compared with two others commonly used in the simulation of logs: the linear multiple regression and the neural network back-propagation, showing, our methodology, however, better results. Finally, to validate the method, it was tested using wells from Namorado Oil Field in Campos Basin, which contains gamma ray, sonic and resistivity logs. (author)

  15. Pollen grains in quaternary sediments from the Campos Basin, state of Rio de Janeiro, Brazil: Core BU-91-GL-05

    Directory of Open Access Journals (Sweden)

    Aline Gonçalves de Freitas

    2013-12-01

    Full Text Available Here, we describe pollen grains extracted from a Pleistocene-Holocene sediment core (BU-91-GL-05; 22°48'45"S; 41°54'13"W taken from the Albacora Slope (22°48'45"S; 41°54'13"W, located in the Campos Basin of the northern region of the state of Rio de Janeiro, Brazil. The analysis resulted in the identification and morphological description of 46 types of pollen: one of a gymnosperm genus (Podocarpus; and 45 of angiosperm taxa across 27 families-one family of monocotyledons (Poaceae and 26 families (30 types of dicotyledons. The most common angiosperm families were Amaranthaceae (Chenopodium, Amaranthus and Gomphrena; Fabaceae (Fabaceae type, Bauhinia, Inga and Canavalia; Malpighiaceae (Tetrapteris, Heteropteris and Peixotoa; Malvaceae (Sida, Abutilon, Hibiscus and Pseudobombax; Rubiaceae (Faramea, Borreria and Psychotria; Asteraceae (Eupatorium and tribe Vernonieae; Bignoniaceae (Bignoniaceae type, Adenocalymma and Tabebuia; and Onagraceae (Fuchsia and Ludwigia. The palynoflora in this study are associated with dense montane and submontane Atlantic Forest, semideciduous forest and restinga (coastal woodland, all of which are present in the state of Rio de Janeiro. Palynological analysis can provide important data about paleovegetation and paleoclimatic changes in the studied area during the Quaternary, specifically in the last 145,000 years.

  16. Carbon and oxygen stable isotope data as paleoenvironmental indicators for limestones from the Campos, Santos and Espirito Santo Basins, Brazil

    International Nuclear Information System (INIS)

    Takaki, T.; Rodrigues, R.

    1984-01-01

    Carbon and oxygen isotope data of limestones from Campos, Santos and Espirito Santo basins provided additional information on the sedimentation environments of these carbonates. The predominance of δ 13 C values between + 1,0 per mille and - 1,0 per mille samples from the Tertiary and the middle section of the Jiquia Stage (Lower Cretaceous) could indiccate, for both carbonate sequences, deposition in a normal marine environment. However, the absence of marine fossils in the Jiquia Stage but not in the Tertiary allows to suggest a normal marine environment for the latter and saline lakes for the former. More positive δ 13 C values in the upper portion of the Jiquia Stage and in the Alagoas Stage suggest a restricted marine environment, with a tendency to hypersalinity. During the Albian the carbonate sedimentation could have occurred in a marine enrironment with an above normal salinity, as indicated by values of δ 13 C between + 3,0 per mille and + 4,0 per mille. According to δ 18 O data, the surface waters were warm, with a tendency of becoming gradually cooler towards the top of the Tertiary. (Author) [pt

  17. Oil seepage detection technique as a tool to hydrocarbon prospecting in offshore Campos Basin-Brazil; Deteccao de exsudacoes de oleo como uma ferramenta de prospeccao de hidrocarbonetos na regiao maritima da Bacia de Campos - Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Castilho, Jose G.; Brito, Ademilson F. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Modelagem de Bacias (LAB2M); Landau, Luiz [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Metodos Computacionais em Engenharia (LAMCE)

    2004-07-01

    With a proven capacity to identify oil slicks in offshore regions, RADARSAT-1 imagery can be useful for oil exploration purposes. The paper discusses the seepage detection method at Campos Basin, offshore Rio de Janeiro State, which is responsible for 80% of the Brazilian production of oil and gas. It is known that the horizontal migration of petroleum can occurs over tens or even hundreds of kilometers, where the source rock placed in more deep locations can be linked with shallow reservoirs or traps and even reach the ocean. It means that seepage can provide information for risking petroleum charge at basin scales, and cannot have a direct relation with the geographical position of the interpreted seeps and possible filled prospects. A good understanding of the geology, and hence the petroleum systems of a basin is the key to use seepage in exploration. The work is divided into three main steps. First step were select oil seepages interpreted at Campos Basin where is found several giant petroleum fields. Second, the geology of the study area and its structural and stratigraphic features were analyzed, in order to identify possible migration pathways related to faults generated by halokinesis. Another important aspect is the presence of 'windows' or ducts in the evaporates beds allowing the contact between the section that contains source rocks and the turbidities reservoirs, that contain the majority of the oil discovers. All these features were interpreted based on a regional dip seismic line (203 - 76), and a geologic cross section with E-W orientation, showing the structure of the Marlim Field. Finally, all the information was integrated in a Geographical Information System (GIS), and then analyzed in an interdisciplinary environment, with the intention to link possible routes of oil migration to post-evaporites reservoirs or to interpreted seeps. (author)

  18. Thermal-history reconstruction of the Baiyun Sag in the deep-water area of the Pearl River Mouth Basin, northern South China Sea

    Science.gov (United States)

    Tang, Xiaoyin; Yang, Shuchun; Hu, Shengbiao

    2017-11-01

    The Baiyun Sag, located in the deep-water area of the northern South China Sea, is the largest and deepest subbasin in the Pearl River Mouth Basin and one of the most important hydrocarbon-accumulation depression areas in China. Thermal history is widely thought to be of great importance in oil and gas potential assessment of a basin as it controls the timing of hydrocarbon generation and expulsion from the source rock. In order to unravel the paleo-heat flow of the Baiyun Sag, we first analyzed tectonic subsidence of 55 pseudo-wells constructed based on newly interpreted seismic profiles, along with three drilled wells. We then carried out thermal modeling using the multi-stage finite stretching method and calibrated the results using collected present-day vitrinite reflectance data and temperature data. Results indicate that the first and second heating of the Baiyun Sag after 49 Ma ceased at 33.9 Ma and 23 Ma. Reconstructed average basal paleoheat flow values at the end of the rifting periods are 57.7-86.2 mW/m2 and 66.7-97.3 mW/m2, respectively. Following the last heating period at 23 Ma, the study area has undergone a persistent thermal attenuation phase, and basal heat flow has cooled down to 64.0-79.2 mW/m2 at present.

  19. Cetaceans occurrence visual monitoring during seismic survey in the North of Campos Basin; Monitoramento visual de ocorrencia de cetaceos durante o levantamento de dados sismicos no norte da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Flor, Karina C.A.; Amaro, Thays P.C.; Carloni, Giuliano G. [Ecologus Engenharia Consultiva, Rio de Janeiro, RJ (Brazil); Uller, George A. [CGGVeritas, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The objective of this research is to present the results of the marine biota visual monitoring developed during the seismic survey in the north area of Campos Basin. The monitoring lasted five months, between 14 February and 14 July 2007, reaching, on average, eleven hours and fifty one minutes of sign effort per day. It was conducted by fourteen marine biota catch sign, three for each period of boarding, that took over during all period of the activity. Sixty two cetaceans were registered, eight belonging to suborder Odontoceti and four belonging to suborder Mysticeti. Tursiops truncatus was the predominant species in number of registers, followed by Megaptera novaeangliae. It's important to report that during all seismic activity period there wasn't any cetacean register presenting any behavior disturbance. (author)

  20. Dynamic behaviour of natural oil droplets through the water column in deep-water environment: the case of the Lower Congo Basin

    Science.gov (United States)

    Jatiault, R.; Dhont, D.; Loncke, L.; Durrieu De Madron, X.; Dubucq, D.; Channelliere, C.; Bourrin, F.

    2017-12-01

    Key words: Hydrocarbon seepage, Oil Slick, Lower Congo Basin, Underwater deflection, Deep-water Pockmark, Ascent speedThe space-borne imagery provides a significant means to locate active oil seeps and to estimate the expelled volume in the marine environment. The analysis of numerous overlapping satellite images revealed an abundant volume of 4400 m3 of oil naturally reaching the sea surface per year, expelled from more than a hundred seep sites through the Lower Congo Basin. The active seepage area is located in the distal compressional province of the basin where salt napes and squeezed diapirs. The integration of current data was used to link accurately sea surface manifestations of natural oil leakages with active fluid flow features on the seafloor. A mooring with ADCPs (Acoustic Doppler Current Profilers) distributed throughout the water column provided an efficient calibration tool to evaluate the horizontal deflection of oil droplets. Using a Eulerian propagation model that considered a range of probable ascent speeds, we estimated the oil migration pathways through the water column using two different approaches. The first approach consisted in simulating the backwards trajectory of oil droplets using sea surface oil slicks locations and concomitant current measurements. The second method analyzed the spatial spreading of the surfacing signatures of natural oil slicks based on 21 years of satellite observations. The location of the surfacing points of oil droplets at the sea surface is restricted to a circle of 2.5 km radius around the release point at the seafloor. Both approaches provided a range of ascent speeds of oil droplets between 3 to 8 cm.s-1. The low deflection values validate the near-vertical links between the average surfacing area of oil slicks at the sea surface with specific seafloor disturbances (i.e. pockmarks or mounds) known to expel fluids.

  1. Project installation the large equipment in line system in Brazil. Gas export line valve P-40 FPSO-MLS. Field Marlim Sul, Campos Basin, Brazil; Operacao de instalacao do maior equipamento no sistema in line ja realizado no Brasil. Valvula do gasoduto P-40 X FPSO-MLS. Campo de Marlim Sul, Bacia de Campos, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Marques, Marcos Antonio Rodrigues; Fernandes, Paulo Tavares [PETROBRAS, Campos dos Goytacases, RJ (Brazil). Exploracao e Producao

    2005-07-01

    This work will approach the current level of development of the installation of connected underwater equipment to flexible lines in the underwater engineering operations in Campos' Basin. The project will show studies, analysis and simulations (through software developed by PETROBRAS) about the installation of the largest equipment laid in the 'in-line' system (connected to flexible lines) in Brazil - and one of the largest of the world: the ESDV (Emergency Shut Down Valve) of the gas pipeline P-40 x FPSO-MLS, in the South Marlim field, in Campos' Basin. This ESDV, of about 18.000 kg, 4 m height and 6,5 m length, has the purpose of assuring the safety conditions on the facilities, interrupting the gas flow exported for P-40 in case of emergency situations. Its installation opened a new alternative in releasing underwater equipment, using the ships that install the flexible lines. This operation occurred in June, 2004, and required the use of a second vessel for support and monitoring of the ESDV laying. The ESDV was installed at 400 m from FPSO-MLS, in a water depth of 1.137 m. This method shall be used broadly by the company in the implantation of the new units of Campos' Basin, and the upcoming studies must consider the gradual increase of the water depth in the new projects. This work will focus the technological development in this area, and one of its purposes is to foresee the future difficulties that can appear in the implantation of the production systems in deep and ultra-deep waters. (author)

  2. Sources of basalt suites in the Campos and Pelotas basins (South-Southeast of Brazil) and geo dynamic breakup models for Western Gondwana; Tipos de fontes associadas as suites basalticas de Campos e de Pelotas (Sul-Sudeste) e modelos geodinamicos de ruptura do Gondwana ocidental

    Energy Technology Data Exchange (ETDEWEB)

    Lobo, Janaina Teixeira; Valente, Sergio de Castro; Szatmari, Peter; Duarte, Beatriz Paschoal [Universidade Estadual do Rio de Janeiro, RJ (Brazil). Faculdade de Geologia. Pos-graduacao]. E-mail: janaina_lobo@hotmail.com

    2006-05-15

    Based essentially on geochemical data, this work aims at defining constrain to the petrogenesis of the Eocretacious basalts from the Campos and Pelotas marginal rift basins (South-Southeast Brazil). Geochemical modeling, including quantification of mantle sources and binary mixing methods, were performed in order to contribute to the elaboration of geo dynamic models related to the initial stages of Gondwana breakup. Basalts from Campos and Pelotas basins comprise two transitional series with tholeiitic affinities. All basalts from the Campos Basin can be assigned to a low-TiO2 suite (TiO2 1.20 +- 0.12 wt %; Ti/Y = 272); whereas basalts from the Pelotas Basin comprise a low-(TiO2 = 1.19 +- 0.02 wt %; Ti/Y = 288) and a high-TiO2 suites (TiO2 = 2.10 +- 0.19 wt %; Ti/Y = 387). Non-modal batch partial melting modeling showed that the La/YbN = 5.78 generation ratio of the Campos Basin suite was obtained from 21% of partial melting of lherzolite garnet. The same model required a source with smaller amounts of garnet (melted at 28%) to generate the La/YbN generation ratio of the low-TiO2 suite of the Pelotas Basin. Larger amounts of grenade and less partial melting (22%) were necessary to generate the La/YbN ratio of the high-TiO2 suite of the Pelotas Basin. The simple binary model shows that parent compositions of Campos and Pelotas cannot result from the mixture of T C (Tristao da Cunha) and SCLM (Sub continental Lithospheric Mantle). The best results obtained suggest the participation of component N-Morb in the generation of basalt suites of the Campos and Pelotas basins (respectively 61% and 93% of partial melting). Tristao da Cunha seems to have been an important component to the generation of the basalt suite of the Campos Basin (at 39% of partial melting). In Pelotas, the model indicates restricted contribution of SCLM reservoirs. (author)

  3. Structural setting and evolution of the Mensa and Thunder Horse intraslope basins, northern deep-water Gulf of Mexico: A case study

    NARCIS (Netherlands)

    Weimer, P.; Bouroullec, R.; Berg, A.A. van den; Lapinski, T.G.; Roesink, J.G.; Adson, J.

    2017-01-01

    The Mensa and Thunder Horse intraslope minibasins in southcentralMississippi Canyon, northern deep-water Gulf ofMexico, had a linked structural evolution from the Early Cretaceous through the late Miocene. Analysis of the two minibasins illustrates the complexities of deep-water sedimentation and

  4. Application of organic facies in sedimentological-stratigraphical model of the Oligo-Miocene and Miocene of the Campos Basin; Aplicacao da faciologia organica no modelo sedimentologico-estratigrafico do Oligo-Mioceno e Mioceno da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Mendonca Filho, Joao Graciano; Mendonca, Joalice de Oliveira; Oliveira, Antonio Donizeti de; Torres, Jaqueline [Universidade Federal do Rio de Janeiro (UFRJ). Centro de Ciencias Exatas e da Natureza. Inst. de Geociencias (Brazil)], e-mails: graciano@geologia.ufrj.br, donizeti@lafo.geologia.ufrj.br, joalice@lafo.geologia.ufrj.br, jaqueline@lafo.geologia.ufrj.br; Menezes, Taissa Rego [Centro de Pesquisas da Petrobras (CENPES), RJ (Brazil). P e D em Geociencias. Gerencia de Geoquimica], e-mail: taissamenezes@petrobras.com.br; Santos, Viviane Sampaio Santiago dos; Arienti, Luci Maria [Centro de Pesquisas da Petrobras (CENPES), RJ (Brazil). P e D em Geociencias. Gerencia de Sedimentologia e Estratigrafia], e-mails: vsss@petrobras.com.br, arienti@petrobras.com.br

    2010-05-15

    This study integrates palynofacies analyses and the sedimentological and stratigraphic model of the Oligo-Miocene/Miocene siliciclastic deposits from the stratigraphic interval of the shallow continental platform up to the slope/basin of the Oligo-Miocene/ Miocene of the Campos Basin proposed. The main objective of the palynofacies study was to characterize the particulate sedimentary organic matter to obtain information about the proximal-distal relationship and the sedimentary organic matter preservation and depositional environmental conditions. The 158 core samples collected in 29 wells of the 9 oil production fields (Albacora, Barracuda, Marlim Sul, Marlim, Voador, Marlim Leste, Moreia and Albacora Leste), were studied. This technique provides information about the proximal-distal relationship and the paleoenvironmental conditions of deposition and preservation of sedimentary organic matter, to facilitate the evaluation and comparisons between the associations of particulate organic components. Thus, the palynofacies technique can be used as another tool in the characterization of depositional systems, based on the spatial and temporal distribution of sedimentary intervals. In general the palynofacies assemblages showed the predominance of the Phytoclast Group (terrestrial derived organic matter) at various degradation stages due to the selective preservation process diagnosed in the studied samples. Some samples, revealed high dinocysts percentages indicative of transgressive depositional conditions. From the obtained data, it was possible to characterize the stratigraphic sequences according to the distribution of particulate organic content (e.g. influence of fluvio-deltaic systems, oxygen system, regressive-transgressive tendencies of each sequence). Additional analyses of Total Organic Carbon (% wt) showed the control of the particulate components from the Phytoclast Group on the TOC (% wt) content, suggesting that the relative sea-level variation curves

  5. V Campos

    Indian Academy of Sciences (India)

    Home; Journals; Bulletin of Materials Science. V Campos. Articles written in Bulletin of Materials Science. Volume 37 Issue 1 February 2014 pp 157-166 Electronic Supplementary Material. Characterization of neutrophil adhesion to different titanium surfaces · V Campos R C N Melo L P Silva E N Aquino M S Castro W ...

  6. Real-time management of data of the petroleum exploration process at Campos Basin - Brazil; Gerenciamento em tempo real de dados do processo de exploracao de petroleo na Bacia de Campos - Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Ladeira, Eduardo [PETROBRAS, Rio de Janeiro, RJ (Brazil); Saad, Sergio Sami [Cybertecnica, Sao Paulo, SP (Brazil)

    2004-07-01

    The main goal of this paper is to show the importance of a secure and efficient information system for a company, from the plant floor to the top management level, as well as the impact of this efficiency on the employees' working routine and on the company's results. The change in the working methodology of the company brought by the implementation of the Operational Information System allowed the sharing of all the information that used to be concentrated almost exclusively at the operational level in true information islands (the offshore platforms) and the delivery of information in real-time to all engineers and technicians from various onshore areas of the company: process monitoring, maintenance, technical assistance, laboratory and planning, also making possible the integration with the Enterprise Management System. All these features allowed an increase in the knowledge about the process, leading to time saving and improvement of the cost/return of investment relationship in several kinds of projects and processes. After the system had been implemented it was possible to monitor in real-time and store all the process data of approximately 30 offshore petroleum exploration platforms of the Campos Basin in a unique repository. (author)

  7. A comparison between three inspection techniques on a sub sea pipeline in Campos Basin; Comparacao do resultado de tres tecnicas de inspecao com pigs instrumentados em um mesmo oleoduto da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Franzoi, Aldo Renato; Bueno, Sergio Ibaje Oliveira; Camerini, Claudio S; Marinho, Carla; Nazario, Fabiana [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Freitas, Miguel; Weid, Jean Pierre von der [Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil)

    2005-07-01

    The PPG-1/PGP-1 crude pipeline links Pargo and Garoupa platforms at the Campos Basin. Garoupa process the crude removing water and transferring it to the coast. During 10 years this pipeline had operated with more than 20% of water. In 2001, the pipeline was surveyed with a MFL pig. The results showed internal corrosion in almost the entire 22 inches pipeline concentrated on its bottom part (channeling corrosion). This type of indication has a high difficult on sizing using MFL tools. The logistic to replace the damaged pipeline was started but before that, the pipeline was surveyed with a US pig to improve the sizing of all defects. The results of the US pig confirmed the MFL report and were decided to keep all tasks in order to replace the corroded segment. At that time, a new inspection pig was under development on PETROBRAS Research Center in cooperation with PUC-Rio/CETUC. It was decided run this tool in that pipeline to compare its results against the two most common methods used for pipelines inspections. (author)

  8. Sonic profile simulation from the profiles of gamma ray and resistivity in the wells from Campos Basin; Simulacao do perfil sonico a partir dos perfis de raios gama e de resistividade em pocos da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Leite, Marcos, E-mail: marcosviniciuscl@gmail.com [PETROBRAS, E e P - SERV/US - PO, Macae, RJ (Brazil); Carrasquilla, Abel, E-mail: abel@lenep.uenf.br [Laboratorio de Engenharia e Exploracao de Petroleo, Universidade Estadual do Norte Fluminense Darcy Ribeiro (LENEP/UENF), Macae, RJ (Brazil); Silva, Jadir da [Instituto de Geociencias, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil)

    2008-04-15

    The knowledge of the mechanical properties of the rocks is essential in the calculation of the stability of the oil wells and in the elaboration of drilling projects, because they help in the selection of the best equipment for each geologic scene. In these activities, the most important mechanical property is the rock compressibility, which can be calculated from the sonic geophysical log, but this one, not always available in the well data set. In order to minimize this limitation, it was developed, in this work, a methodology to simulate it through an algorithm that utilizes fuzzy logic concepts, using as input data gamma ray and resistivity logs. The basic principle of this methodology is to propose that any geophysical log, including the sonic log, can be considered function of other measured geophysical logs in the same depths. On the other hand, to test the confidence of this approach, it was compared with two others commonly used in the simulation of logs: the linear multiple regression and the neural network back-propagation, showing, our methodology, however, better results. Finally, to validate the method, it was tested using wells from Namorado Oil Field in Campos Basin, which contains gamma ray, sonic and resistivity logs. (author)

  9. Stratigraphic and tectonic control of deep-water scarp accumulation in Paleogene synorogenic basins: a case study of the Súľov Conglomerates (Middle Váh Valley, Western Carpathians

    Directory of Open Access Journals (Sweden)

    Soták Ján

    2017-10-01

    Full Text Available The Súľov Conglomerates represent mass-transport deposits of the Súľov-Domaniža Basin. Their lithosomes are intercalated by claystones of late Thanetian (Zones P3 - P4, early Ypresian (Zones P5 - E2 and late Ypresian to early Lutetian (Zones E5 - E9 age. Claystone interbeds contain rich planktonic and agglutinated microfauna, implying deep-water environments of gravity-flow deposition. The basin was supplied by continental margin deposystems, and filled with submarine landslides, fault-scarp breccias, base-of-slope aprons, debris-flow lobes and distal fans of debrite and turbidite deposits. Synsedimentary tectonics of the Súľov-Domaniža Basin started in the late Thanetian - early Ypresian by normal faulting and disintegration of the orogenic wedge margin. Fault-related fissures were filled by carbonate bedrock breccias and banded crystalline calcite veins (onyxites. The subsidence accelerated during the Ypresian and early Lutetian by gravitational collapse and subcrustal tectonic erosion of the CWC plate. The basin subsided to lower bathyal up to abyssal depth along with downslope accumulation of mass-flow deposits. Tectonic inversion of the basin resulted from the Oligocene - early Miocene transpression (σ1 rotated from NW-SE to NNW-SSE, which changed to a transpressional regime during the Middle Miocene (σ1 rotated from NNE-SSW to NE-SW. Late Miocene tectonics were dominated by an extensional regime with σ3 axis in NNW-SSE orientation.

  10. Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05

    Directory of Open Access Journals (Sweden)

    Aline Gonçalves de Freitas

    2015-06-01

    Full Text Available This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years BP. Thirty different types of palynomorphs were identified, described, and photographed: two bryophyte spores (sensu lato; 21 pteridophyte spores; four freshwater microalgae; onePseudoschizaea; and two microfungi. Some of the identified spores (Sphagnum, Blechnum, Cyatheaceae, Dennstaedtiaceae, Lycopodiella, Microgramma, Polypodium, Acrostichum, Pityrogramma, and Lygodium are related to the modern flora found on the northern coast of Rio de Janeiro State, at the Restinga of Jurubatiba, from vegetation types such as shrub swamp/coastal swamp formation, seasonally flooded forest, Clusia and Ericaceae woods, and disturbed vegetation. The freshwater microalgae and the microfungi are also presently recorded from the coastal lagoons of this region. The high spore concentration in slope sediments reflects the intense terrigenous influx, caused by a relative low sealevel during glacial stages. Palynological analysis suggests the presence of taxa from flooded forests and humid areas in the coastal plain during glacial and interglacial stages of the Late Pleistocene.

  11. Environmental controls on the distribution of living (stained) benthic foraminifera on the continental slope in the Campos Basin area (SW Atlantic)

    Science.gov (United States)

    Yamashita, Cintia; Mello e Sousa, Silvia Helena de; Vicente, Thaisa Marques; Martins, Maria Virgínia; Nagai, Renata Hanae; Frontalini, Fabrizio; Godoi, Sueli Susana; Napolitano, Dante; Burone, Letícia; Carreira, Renato; Figueira, Rubens Cesar Lopes; Taniguchi, Nancy Kazumi; Rezende, Carlos Eduardo de; Koutsoukos, Eduardo Apostolos Machado

    2018-05-01

    Living (stained) benthic foraminifera from deep-sea stations in the Campos Basin, southeastern Brazilian continental margin, were investigated to understand their distribution patterns and ecology, as well as the oceanographic processes that control foraminiferal distribution. Sediments were collected from 1050 m to 1950 m of water depth during the austral winter of 2003, below the Intermediate Western Boundary Current (IWBC) and the Deep Water Boundary Current (DWBC). Based on statistical analysis, vertical flux of particulate organic matter and the grain size of sediment seem to be the main factors controlling the spatial distribution of benthic foraminifera. The middle slope (1050 m deep) is characterized by relatively high foraminiferal density and a predominance of phytodetritus-feeding foraminifera such as Epistominella exigua and Globocassidulina subglobosa. The occurrence of these species seems to reflect the Brazil Current System (BCS). The above-mentioned currents are associated with the relatively high vertical flux of particulate organic matter and the prevalence of sandy sediments, respectively. The lower slope (between 1350 and 1950 m of water depth) is marked by low foraminiferal density and assemblages composed of Bolivina spp. and Brizalina spp., with low particulate organic matter flux values, muddy sediments, and more refractory organic matter. The distribution of this group seems to be related to episodic fluxes of food particles to the seafloor, which are influenced by the BCS at the surface and are deposited under low deep current activity (DWBC).

  12. Study of chemical composition of sludges and scales from the oil production activities and correlation with natural radioactivity - case study: Campos Basin, Brazil

    International Nuclear Information System (INIS)

    Cruz, Rosana Petinatti da

    2002-01-01

    This work intended to study general aspects related to natural radioactivity, focusing on its occurrence in the oil industry and on sludge and scales samples taken from the Oil E and P region from Campos's Basin. The physical and chemical analysis and the statistical treatment were carried out with the objective of determine the samples composition checking the differences between the sludges and the scales. Third six representative samples were obtained from the Radioprotection and Dosimetry Institute (IRD/CNEN), Brazil, taking into account factors such as activity concentration, physical and chemical aspects and origin. After the oil extraction, samples were classified by aspects as color and granulometry. Ali the studied samples were analyzed by X-rays diffraction being identified the presence of barite, calcite, quartz among others. The results supplied a base for the elaboration of a successive determination scheme which comprehended residual organic material, carbonate, sulfate, silica, chloride and metals as the alkaline, earthy alkaline, aluminum, etc. The sludges presented a highly variable chemical composition, being rich in silica and carbonates. The main components analysis showed a statistical valid relationship among the radium isotopes and the carbonates presence. On the other hand, the scales are made of barium and strontium sulfates (75%), presenting a minor variation on its chemical composition and in the existing radium content. Due to this low variability of the barium, sulfate and radium contents, it has not been possible to consider valid a relationship that could exist among them in the application of the main component analysis. (author)

  13. Effects of non-aqueous fluids-associated drill cuttings discharge on shelf break macrobenthic communities in the Campos Basin, Brazil.

    Science.gov (United States)

    Santos, Maria Fernanda L; Silva, Janete; Fachel, Jandyra M G; Pulgati, Fernando H

    2010-08-01

    This paper assesses the effects of non-aqueous fluids (NAF)-associated drill cuttings discharge on shelf break macrobenthic communities in the Campos Basin, off the southeast Brazilian coast, Rio de Janeiro State. Samples were taken with a 0.25-m2 box corer from surrounding two oil and gas wells on three monitoring cruises: before drilling, three months after drilling, and 22 months after drilling. Statistical methodologies used Bayesian geostatistical and analysis of variance models to evaluate the effects of the NAF-associated drill cuttings discharge and to define the impact area. The results indicated that marked variations were not observed in the number of families between cruises, though there were changes in the fauna composition. The changes seen in biological descriptors in both control and background situation areas were not considered significant, showing a temporal homogeneity in means. The impact area presented changes in biological descriptors of communities and trophic structure during the three cruises and such changes were correlated to chemical and physical variables related to the drilling activities, as a result of the mix of drill cuttings and sediment and the anoxic conditions established in the substrate. In that area, three months after drilling, a decrease in diversity and an increase in density, motile deposit-feeders and Pol/Crp ratio, and dominance of opportunistic organisms, such as the capitellid Capitella sp., were observed and, 22 months after drilling, an increase of diversity, reduction of dominance of capitellid polychaete, changes in the fauna composition, and a dominance of opportunistic burrowing and tube-building organisms were observed, indicating an ecological succession process.

  14. Gulf of Mexico deep-water

    International Nuclear Information System (INIS)

    Ott, G.L.

    1998-01-01

    The deepwater Gulf of Mexico, an emerging basin with 20 BBOE resource potential, was discussed. Technologies are advancing and development options are increasing within the Gulf of Mexico deepwater environment. Deepwater offers significant rate potentials leading to strong cash flows. The projected steep rate of resources captured in the next five years show that there is a short window of opportunity to establish a business position. The major production variables are development costs and cycle time. There is a definite market for Gulf of Mexico products because U.S. energy demand is expected to outstrip U.S. supply. Present infrastructure is capable of moving large volumes of gas into major U.S. markets, but with the large number of projects currently underway, especially in the United States, supply could exceed capacity. 1 tab., 16 figs

  15. Concentrations and isotope ratios of mercury in sediments from shelf and continental slope at Campos Basin near Rio de Janeiro, Brazil.

    Science.gov (United States)

    Araujo, Beatriz Ferreira; Hintelmann, Holger; Dimock, Brian; Almeida, Marcelo Gomes; Rezende, Carlos Eduardo

    2017-07-01

    Mercury (Hg) may originate from both anthropogenic and natural sources. The measurement of spatial and temporal variations of Hg isotope ratios in sediments may enable source identification and tracking of environmental processes. In this study we establish the distribution of mercury concentrations and mercury isotope ratios in surface sediments of three transects along the continental shelf and slope in Campos Basin-RJ-Brazil. The shelf showed on average lower total Hg concentrations (9.2 ± 5.3 ng g -1 ) than the slope (24.6 ± 8.8 ng g -1 ). MMHg average concentrations of shelf 0.15 ± 0.12 ng g -1 and slope 0.13 ± 0.06 ng g -1 were not significantly different. Distinct differences in Hg isotope ratio signatures were observed, suggesting that the two regions were impacted by different sources of Hg. The shelf showed more negative δ 202 Hg and Δ 199 Hg values ranging from -0.59 to -2.19‰ and from -0.76 to 0.08‰, respectively. In contrast, the slope exhibited δ 202 Hg values from -0.29 to -1.82‰ and Δ 199 Hg values from -0.23 to 0.09‰. Mercury found on the shelf, especially along the "D" and "I" transects, is depleted in heavy isotopes resulting in more negative δ 202 Hg compared to the slope. Isotope ratios observed in the "D" and "I" shelf region are similar to Hg ratios commonly associated with plants and vegetation and very comparable to those detected in the estuary and adjoining mangrove forest, which suggests that Hg exported from rivers may be the dominating source of Hg in near coastal regions along the northern part of the shelf. Copyright © 2017 Elsevier Ltd. All rights reserved.

  16. Deepwater Horizon - Baseline Dataset

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In 2010, the Deepwater Horizon oil spill occurred in the Gulf of Mexico and the Natural Resources Damage Assessment (NRDA) was initiated to determine the extent of...

  17. Emissões naturais e antrópicas de nitrogênio, fósforo e metais para a bacia do Rio Macaé (Macaé, RJ, Brasil sob influência das atividades de exploração de petroleo e gás na Bacia de Campos Natural and anthropogenic emissions of nitrogen, phosphorous and metals into the Macaé river basin (Macaé, RJ, Brazil Influenced by oil and gas exploration in Campos Basin

    Directory of Open Access Journals (Sweden)

    Mauricio Mussi Molisani

    2013-01-01

    Full Text Available Emission factors of natural processes and anthropogenic activities were used to estimate nutrients and metal loads for the lower Macaé river basin, which hosts the operational base for the offshore oil and gas exploration in the Campos Basin. The estimates indicated that emissions from anthropogenic activities are higher than natural emissions. Major contributing drivers include husbandry and urbanization, whose effluents receive no treatment. The increasing offshore oil exploration along the Brazilian littoral has resulted in rapid urbanization and, therefore might increase the inshore emission of anthropogenic chemicals in cases where effective residue control measures are not implemented in fluvial basins of the region.

  18. Physical simulation of gas reservoir formation in the Liwan 3-1 deep-water gas field in the Baiyun sag, Pearl River Mouth Basin

    Directory of Open Access Journals (Sweden)

    Gang Gao

    2015-01-01

    Full Text Available To figure out the process and controlling factors of gas reservoir formation in deep-waters, based on an analysis of geological features, source of natural gas and process of reservoir formation in the Liwan 3-1 gas field, physical simulation experiment of the gas reservoir formation process has been performed, consequently, pattern and features of gas reservoir formation in the Baiyun sag has been found out. The results of the experiment show that: ① the formation of the Liwan 3-1 faulted anticline gas field is closely related to the longstanding active large faults, where natural gas is composed of a high proportion of hydrocarbons, a small amount of non-hydrocarbons, and the wet gas generated during highly mature stage shows obvious vertical migration signs; ② liquid hydrocarbons associated with natural gas there are derived from source rock of the Enping & Zhuhai Formation, whereas natural gas comes mainly from source rock of the Enping Formation, and source rock of the Wenchang Formation made a little contribution during the early Eocene period as well; ③ although there was gas migration and accumulation, yet most of the natural gas mainly scattered and dispersed due to the stronger activity of faults in the early period; later as fault activity gradually weakened, gas started to accumulate into reservoirs in the Baiyun sag; ④ there is stronger vertical migration of oil and gas than lateral migration, and the places where fault links effective source rocks with reservoirs are most likely for gas accumulation; ⑤ effective temporal-spatial coupling of source-fault-reservoir in late stage is the key to gas reservoir formation in the Baiyun sag; ⑥ the nearer the distance from a trap to a large-scale fault and hydrocarbon source kitchen, the more likely gas may accumulate in the trap in late stage, therefore gas accumulation efficiency is much lower for the traps which are far away from large-scale faults and hydrocarbon source

  19. Origin of Organic Matter in Sediments of the Campos Basin (SE Brazilian Continental Margin) by Means of Stable Isotopes and Molecular Markers

    Energy Technology Data Exchange (ETDEWEB)

    Wagener, A. L.R.; Carreira, R. S.; Baeta, A.; Scofield, A. L. [Departamento de Quimica, Pontificia Universidade Catolica, Rio de Janeiro, RJ (Brazil); Farias, C. O.; Cordeiro, L. G.M.S.; Oliveira, D. R. [Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ (Brazil); Rezende, C. E.; Almeida, M. [Centro de Biociencias e Biotecnologia, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ (Brazil)

    2013-07-15

    Sediment samples were taken from a total of 133 stations in two sampling campaigns (winter 2008/2009 and summer 2009) distributed on the shelf and in transects which extended from 25 m to 3000 m water depth. The region under study is influenced by upwelling, river discharge and beyond the platform by five different water masses. The goal of the work was to examine by means of carbon isotopic composition and lipid biomarkers the provenance of the organic matter pool in the sediments so as to evaluate source strength, degradation and relevance to sustain a benthic community. Isotopic and molecular indicators show the influence of the outflow of the Paraiba do Sul river on the quality and quantity of organic matter (OM) that accumulates on the shelf; however, this influence is dependent on the hydrological regime on the river's basin. In the upwelling region of Cabo Frio, the OM is mainly of autochthonous sources, and evidence of export of labile OM produced on the shelf to the slope was found, which can potentially influence the benthic process at depths between 700 and 1000 m. (author)

  20. Reestruturação produtiva, terceirização e relações de trabalho na indústria petrolífera offshore da Bacia de Campos (RJ Productive reorganization, outsourcing and labor relations in an offshore oil industry in Campos Basin

    Directory of Open Access Journals (Sweden)

    Denise Alvarez

    2007-04-01

    Full Text Available Este artigo analisa as correlações do uso intensivo da tercerização com as relações de trabalho nas plataformas offshore da Bacia de Campos (RJ. Abordamos prioritariamente o intervalo que abrange os últimos 10 anos, período em que acompanhamos de forma sistemática o referido campo empírico. O referencial teórico-metodológico utilizado no curso da pesquisa, na qual se insere esta contribuição, inspira-se com maior ênfase no instrumental da Ergonomia da Atividade e da Psicodinâmica do Trabalho numa perspectiva ergológica. Em nossa análise, além da tendência à precarização do trabalho em sentido mais global, merecem destaque as possíveis perdas no ativo de conhecimento formal e informal (um patrimônio longamente acumulado devido à fragmentação dos coletivos de trabalho, já que consideramos a coesão destes um elemento crucial para a confiabilidade do sistema. Em verdade, a precarização do trabalho contribui para esta fragmentação, e tem como uma de suas causas o avanço pouco criterioso da terceirização, na esteira das várias iniciativas de flexibilização organizacional ligadas à reestruturação produtiva do setor. Isto acarretou conseqüências nefastas para a saúde e a segurança dos trabalhadores indicando que a opção pela terceirização como instrumento de gestão, da forma com que vinha sendo conduzida até recentemente, não estaria considerando tais implicações com o devido rigor.This paper analyses the correlations between the intensive use of outsourcing and labor organizations on offshore oil platforms in the Campos Basin (Rio de Janeiro. We studied and followed the reported empirical field over the last 10 years in a systematic way. The theorist-methodological referential applied in our research, in which this work can be found, was inspired by Ergonomics of the Activity and the Psycho Dynamic of the Work. In our analysis, two aspects should be mentioned: the tendency of increasing

  1. Multivariate analysis of calcareous nanno fossils and stable isotopic ({delta}{sup 18}O and {delta}{sup 13}C) in the upper Campanian - lower Maastrichtian of the Campos Basin, Brazil; Analise multivariada em nanofosseis calcarios e isotopos estaveis ({delta}{sup 18}O e {delta}{sup 13}C) do Campaniano superior - Maastrichtiano inferior na Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Luiz Carlos Veiga de [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas. Gerencia de Bioestratigrafia e Paleoecologia]. E-mail: lcveiga@petrobras.com.br; Rodrigues, Rene; Lemos, Valesca Brasil

    2005-05-01

    Qualitative analysis in calcareous nanno fossils is a powerful tool for bio stratigraphic uses, principally in identification of bio zones and determination of relative age. But quantitative studies must be applied for pale oceanographic applications and high resolution bio stratigraphy. In order to better understand the relationships between the different species of nanno fossils, new methodologies and non-traditional correlation tools were tested on a 18 m upper Campanian - lower Maastrichtian core from Campos Basin. Multiple regression helped to determine the best counting method. Watznaueria barnesae and Micula decussata dominate the fossil assemblage and have inverse abundances to each other. Both were opportunist species in competition for nutrients. Q mode factorial analysis (57 samples, 19 variables) was applied to the same core and shows that two factors explain 99.2% of the total variance of the micro fossil assemblage. The first factor represents 83.6% and the second factor only 15.6% of the total variance. The former is associated with Watznaueria barnesae, Cribrosphaerella ehrenbergii and Stradneria crenulata, which represent the original population of nano plankton. The latter factor is associated with Micula decussata, which is believed to represent the effect of solution at the sediment water interface. Both factors were used to develop a dissolution-sea level curve for nanno fossils. When combined with oxygen and carbon isotopes, this curve clearly shows that higher dissolution occurred during the late Campanian - early Maastrichtian time when {delta}{sup 18}O, {delta}{sup 13} C and TOC all had lower values. These correlations indicate a strong link between high sea levels, high temperatures and lower amount of continental organic debris. (author)

  2. Il campo magnetico terrestre

    OpenAIRE

    Meloni, A.; Winkler, A.

    2004-01-01

    La Terra si comporta come se fosse una grande calamita, in grado di influenzare l'ago magnetico delle bussole la quale si orienta approssimativamente verso Nord. La forza che agisce sull’ago, costringendolo ad assumere questa posizione, è generata dal campo magnetico terrestre.

  3. fernanda f campos

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Biosciences. FERNANDA F CAMPOS. Articles written in Journal of Biosciences. Volume 42 Issue 4 December 2017 pp 657-664 Article. In vitro leishmanicidal, antibacterial and antitumour potential of anhydrocochlioquinone A obtained from the fungus Cochliobolus sp. FERNANDA F CAMPOS ...

  4. Producing deep-water hydrocarbons

    International Nuclear Information System (INIS)

    Pilenko, Thierry

    2011-01-01

    Several studies relate the history and progress made in offshore production from oil and gas fields in relation to reserves and the techniques for producing oil offshore. The intention herein is not to review these studies but rather to argue that the activities of prospecting and producing deep-water oil and gas call for a combination of technology and project management and, above all, of devotion and innovation. Without this sense of commitment motivating men and women in this industry, the human adventure of deep-water production would never have taken place

  5. IL CAMPO GEOMAGNETICO

    Directory of Open Access Journals (Sweden)

    F. MOLINA

    1972-06-01

    Full Text Available Questo lavoro non è un trattato sul campo geomagnetico e nemmeno
    una rassegna sull'argomento, almeno nel significato che normalmente
    si attribuisce al termine « rassegna »; esso è semplicemente
    un tentativo di condensare in termini comprensibili agli studiosi non
    specializzati ciò che oggi si sa o si ipotizza sul magnetismo terrestre
    e sulle sue cause. Chi scrive si è sempre trovato a disagio di fronte
    alle richieste di una spiegazione sull'origine del campo magnetico
    terrestre: o si cerca di cavarsela con poche parole (« si tratta di correnti
    elettriche indotte nell'interno della Terra » che possono forse accontentare
    chi non si occupa in modo particolare di problemi scientifici
    ma non possono soddisfare un fisico, oppure ci si sente obbligati a
    tentare faticosamente di approfondire, sia per capirli personalmente
    che per poterli poi spiegare agli altri, argomenti e ragionamenti che
    sono in realtà accessibili solo a un fisico teorico ben preparato. Apparentemente
    non esiste una via di mezzo, come del resto in molti altri
    campi della fisica contemporanea.
    La presente monografia rappresenta appunto il tentativo di trovare
    questa via di mezzo: nel terzo capitolo, dedicato alle teorie sull'origine
    del campo geomagnetico, si cerca di descrivere qualitativamente
    i principali processi fisici proposti come sorgenti del campo,
    dopo un accenno ai fondamenti fisici e matematici sui quali sono state
    elaborate le varie teorie. Senza farmi soverchie illusioni di essere riuscito
    nell'intento, mi dichiarerei tuttavia soddisfatto se questo lavoro
    destasse sull'argomento l'interesse di qualche giovane ricercatore, incoraggiandolo
    ad un approfondimento.

  6. Barbabos Deep-Water Sponges

    NARCIS (Netherlands)

    Soest, van R.W.M.; Stentoft, N.

    1988-01-01

    Deep-water sponges dredged up in two locations off the west coast of Barbados are systematically described. A total of 69 species is recorded, among which 16 are new to science, viz. Pachymatisma geodiformis, Asteropus syringiferus, Cinachyra arenosa, Theonella atlantica. Corallistes paratypus,

  7. All eyes on the deepwater prize

    Energy Technology Data Exchange (ETDEWEB)

    Shepherd, Richard

    2000-01-01

    This article focuses on the impact of the opportunity of deepwater oil on the production growth ambitions of oil companies. Details are given of the trend towards the spending of less money, drilling fewer wells, and developing fewer new fields by the larger oil companies to obtain the best available profit. The greening of oil with the growing awareness of environmental concerns and fuel efficiency aspects is considered. The global potential for deepwater oil production, the threat to deepwater economics of market pressures, and the dominant position of large companies in deepwater activities are discussed. (UK)

  8. Ultra-Deepwater Production Systems

    Energy Technology Data Exchange (ETDEWEB)

    Ken L. Smith; Marc E. Leveque

    2005-05-31

    The report herein is a summary of the work performed on three projects to demonstrate hydrocarbon drilling and production methods applicable to deep and ultra deepwater field developments in the Gulf of Mexico and other like applications around the world. This work advances technology that could lead to more economic development and exploitation of reserves in ultra-deep water or remote areas. The first project is Subsea Processing. Its scope includes a review of the ''state of the art'' in subsea components to enable primary production process functions such as first stage liquids and gas separation, flow boosting, chemical treatment, flow metering, etc. These components are then combined to allow for the elimination of costly surface production facilities at the well site. A number of studies were then performed on proposed field development projects to validate the economic potential of this technology. The second project involved the design and testing of a light weight production riser made of composite material. The proposed design was to meet an actual Gulf of Mexico deepwater development project. The various engineering and testing work is reviewed, including test results. The third project described in this report encompasses the development and testing of a close tolerance liner drilling system, a new technology aimed at reducing deepwater drilling costs. The design and prototype testing in a test well are described in detail.

  9. Video nueva herramienta del campo

    Directory of Open Access Journals (Sweden)

    Manuel Calvelo Ríos

    2015-01-01

    Full Text Available El Video resulta ser una herramienta sumamente útil para el desarrollo rural. Entendemos por desarrollo rural el intento de regular las relaciones campo-ciudad en términos más equitativos para el hombre del campo. Es por tanto una decisión política.

  10. Ultra-Deepwater Production Systems

    Energy Technology Data Exchange (ETDEWEB)

    K. L. Smith; M. E. Leveque

    2003-09-30

    This report includes technical progress made during the period October, 2002 through September, 2003. At the end of the second technical progress report, the ConocoPhillips opportunities to apply subsea processing in the Gulf of Mexico had been exhausted, and an alternative site was identified in Norway. This was a non-ConocoPhillips operated field, and the subsea processing was proposed as a phased development approach with 2-phase separation at the field, and then gas and liquids exported via pipeline to remote platform locations for processing. Although the unrisked economics were quite favorable, the risked economic evaluation compelled the operator to develop the field with the more conventional and proven Floating Production, Storage and Offloading (FPSO) option. Work on the subsea processing was suspended at this time. Discussions with DOE regarding two other step-change deepwater technologies ensued. One was an effort to develop a light-weight, high pressure composite production riser. A field demonstration of the design would then be performed by deploying a limited number of composite joints in a Gulf of Mexico deepwater development. The other was to begin the process of taking drilling with casing technology to the deepwater. This is called, ''close-tolerance liner drilling''. It was agreed that both technologies should be pursued, and the work began. During this reporting period, the initial production riser design had been completed and preliminary test sample components were being fabricated. Regarding the liner drilling, the sub-contractors were selected, the design basis was agreed and designs progressed towards meeting a projected first quarter, 2004 onshore test program.

  11. Ultra-Deepwater Production Systems

    Energy Technology Data Exchange (ETDEWEB)

    K. L. Smith; M. E. Leveque

    2004-09-30

    This report includes technical progress made during the period October, 2003 through September, 2004. At the end of the last technical progress report, the subsea processing aspects of the work program had been dropped due to the lack of commercial opportunity within ConocoPhillips, and the program had been redirected towards two other promising deepwater technologies: the development and demonstration of a composite production riser, and the development and testing of a close-tolerance liner drilling system. This report focuses on these two technologies.

  12. Markov chains and entropy tests in genetic-based lithofacies analysis of deep-water clastic depositional systems

    Directory of Open Access Journals (Sweden)

    Borka Szabolcs

    2016-01-01

    Full Text Available The aim of this study was to examine the relationship between structural elements and the so-called genetic lithofacies in a clastic deep-water depositional system. Process-sedimentology has recently been gaining importance in the characterization of these systems. This way the recognized facies attributes can be associated with the depositional processes establishing the genetic lithofacies. In this paper this approach was presented through a case study of a Tertiary deep-water sequence of the Pannonian-basin.

  13. Deepwater Horizon Seafood Safety Oracle Database (2010)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In 2010, the Deepwater Horizon oil spill occurred in the Gulf of Mexico. In response to this spill, the National Marine Fisheries Service initiated a data collection...

  14. Production strategy and technological challenges arisen with the low permeability gas reservoirs in the Mexilhao, Urugua and Tambau Fields, Campos Basin, Southeast, Brazil; Estrategia de producao e desafios tecnologicos no desenvolvimento da producao de gas nos reservatorios de baixa permeabilidade dos Campos de Mexilhao, Urugua e Tambau, Bacia de Santos

    Energy Technology Data Exchange (ETDEWEB)

    Barroso, Alberto da Silva; Silva, Celso Tarcisio de Souza; Pires, Luis Carlos Gomes; Damasceno, Luis Carlos; Filoco, Paulo Roberto [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Mexilhao, Urugua and Tambau Fields are located in the North part of the Santos Basin will produce together 18 106 m3/d of gas and 45 000 bbl/d of oil and condensate. Besides the contribution to attend the country gas demand the production of these fields starts the establishment of a minimum gas production, transportation and processing infra-structure, that are flexible enough to permit increasing in production from possible upsides. This new production pole has a strategic importance because it will increment gas production close to the main brazilian consumer center. Mexilhao, Urugua and Tambau Fields are located in the North part of the Santos Basin will produce together 18 106 m3/d of gas and 45 000 bbl/d of oil and condensate. Besides the contribution to attend the country gas demand the production of these fields starts the establishment of a minimum gas production, transportation and processing infra-structure, that are flexible enough to permit increasing in production from possible upsides. This new production pole has a strategic importance because it will increment gas production close to the main brazilian consumer center.(author)

  15. Deepwater development - the metocean challenges

    International Nuclear Information System (INIS)

    Graham, C.

    1998-01-01

    As the focus of the offshore industry moves increasingly towards deepwater, attention is concentrating more and more on life-cycle field development costs. Key elements are reducing development lead times, equipment standardisation and efficient use of scarce resources. An essential precursor is a clear definition of the metocean environment. Without it, engineering design may be unnecessarily conservative or inadequate. Either way the consequences will be expensive. It is the metocean challenge to help bring down costs, while maintaining adequate safety levels by providing the necessary answers, but most important of all, to do this in sufficient time to be in step with the engineering requirements at each stage of a planned development. (author)

  16. A Two-Dimensional Post-Stack Seismic Inversion for Acoustic Impedance of Gas and Hydrate Bearing Deep-Water Sediments Within the Continental Slope of the Ulleung Basin, East Sea, Korea

    Directory of Open Access Journals (Sweden)

    Keumsuk Lee

    2013-01-01

    Full Text Available A post-stack inversion of 2D seismic data was conducted to estimate the spatial distribution of acoustic impedance associated with gas and hydrates in the Ulleung Basin, East Sea, Korea constrained by logs from three boreholes drilled on its continental margin. A model-based inversion was applied to a Plio-Quaternary succession composed of alternations of unconsolidated mass-flow deposits/turbidites. A comparison of seismic reflections and synthetic data computed from impedance logs is shown for two zones. An upper (steep slope zone contains a moderately continuous, possibly bottom-simulating reflector feature along the corresponding section. This feature may be associated with a lithology boundary near a drill site in addition to, or instead of, a stability boundary of gas hydrates (i.e., gas below and hydrates above. The lower (gentle slope zone has locally cross-cutting reflection patterns that are more likely to be attributed to gas- and hydrate-related physical phenomena than to spatiotemporal changes in lithology. This seismic inversion is informative and useful, making a contribution to enhance the interpretability of the seismic profiles for a potential hydrate recovery.

  17. Deepwater Ports in US waters as of August 2013

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Deepwater Port Licensing Program is the application process designed to promote the construction of LNG and oil deepwater ports. This license system was...

  18. Erosion and deposition by supercritical density flows during channel avulsion and backfilling: Field examples from coarse-grained deepwater channel-levée complexes (Sandino Forearc Basin, southern Central America)

    Science.gov (United States)

    Lang, Jörg; Brandes, Christian; Winsemann, Jutta

    2017-03-01

    Erosion and deposition by supercritical density flows can strongly impact the facies distribution and architecture of submarine fans. Field examples from coarse-grained channel-levée complexes from the Sandino Forearc Basin (southern Central America) show that cyclic-step and antidune deposits represent common sedimentary facies of these depositional systems and relate to the different stages of avulsion, bypass, levée construction and channel backfilling. During channel avulsion, large-scale scour-fill complexes (18 to 29 m deep, 18 to 25 m wide, 60 to > 120 m long) were incised by supercritical density flows. The multi-storey infill of the large-scale scour-fill complexes comprises amalgamated massive, normally coarse-tail graded or widely spaced subhorizontally stratified conglomerates and pebbly sandstones, interpreted as deposits of the hydraulic-jump zone of cyclic steps. The large-scale scour-fill complexes can be distinguished from small-scale channel fills based on the preservation of a steep upper margin and a coarse-grained infill comprising mainly amalgamated hydraulic-jump zone deposits. Channel fills include repeated successions deposited by cyclic steps with superimposed antidunes. The deposits of the hydraulic-jump zone of cyclic steps comprise regularly spaced scours (0.2 to 2.6 m deep, 0.8 to 23 m long) infilled by intraclast-rich conglomerates or pebbly sandstones, displaying normal coarse-tail grading or backsets. These deposits are laterally and vertically associated with subhorizontally stratified, low-angle cross-stratified or sinusoidally stratified sandstones and pebbly sandstones, which were deposited by antidunes on the stoss side of the cyclic steps during flow re-acceleration. The field examples indicate that so-called spaced stratified deposits may commonly represent antidune deposits with varying stratification styles controlled by the aggradation rate, grain-size distribution and amalgamation. The deposits of small-scale cyclic

  19. Water isotopic characterization of hypersaline formation of a petroleum field Reconcavo basin, Brazil; Caracterizacao isotopica de aguas de formacao hipersalinas de um campo de petroleo da Bacia do Reconcavo, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Teles, Danilo Ribeiro de Sa; Azevedo, Antonio Expedito Gomes de, E-mail: danilosateles@yahoo.com.br, E-mail: expedito@ufba.br [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Inst. de Fisica. Centro de Pesquisa em Geofisica e Geologia; Santos, Christian Pereira Lopes dos, E-mail: cplsgs@gmail.com [Instituto Federal Baiano, Salvador, BA (Brazil)

    2010-04-15

    Formation water is the water present in reservoir rock pores, produced together with petroleum. Usually it is hyper saline with concentrations that can be higher than 250 g/l of dissolved solids. The concentration of the dissolved elements and the isotopic composition of the water and of some of the dissolved elements can be excellent tracers to study the dynamic of underground fluid flux, the mixing of distinct sources and the origin of salinization of these waters. This work reports the isotopic composition ({delta}{sup 2}H , {delta}{sup 18}O) and electrical conductivity (EC) of formation waters from 10 wells of a petroleum field of the Reconcavo Basin, looking for their evolution, interaction with the minerals and rocks and reservoir interconnection. The samples have electric conductivity ranging from 84 to 137 mS/cm, with conductivity increasing with depth of production zone. It is observed an enrichment of deuterium and oxygen-18 with the depth of production zone, probably due to water-rock interactions that were probably increased by higher temperatures of the deeper levels and longer residence times. The samples from the production zone between 1450 to 1520 m, drained by 7 of the 10 wells sampled, show a small range in isotopic composition and in electric conductivity, indicating homogeneity in this level of the reservoir. In the shallow level of 450 m the values of {delta}{sup 2}H , {delta}{sup 18}O and EC are lower, with isotopic composition similar to the oceanic water, possibly representing the original water that entered the reservoir during the sedimentation of the basin. (author)

  20. Dinâmica do ecótono floresta-campo no sul do estado do Amazonas no Holoceno, através de estudos isotópicos e fitossociológicos Vegetation dynamics during the Holocene in a forest-savanna transition, Southern Amazon Basin, based on isotope and phytosociological studies

    Directory of Open Access Journals (Sweden)

    Elaine Vidotto

    2007-01-01

    Full Text Available Com o emprego dos isótopos do carbono (12C, 13C, 14C da matéria orgânica do solo (MOS e das plantas, é apresentado um estudo comparativo entre perfis orgânicos de solos formados em depressões de áreas cobertas por ecossistemas de campos e florestas ao sul do estado do Amazonas, visando o entendimento da dinâmica da paleovegetação. A dinâmica da vegetação atual na região foi avaliada utilizando-se estudos fitossociológicos e caracterizações botânica e isotópica (delta13C das espécies de plantas presentes em duas bordas floresta-campo. Teores de carbono orgânico total foram superiores nas camadas superficiais no campo, quando comparados com a floresta. Dados de delta13C associados à cronologia do 14C indicaram predomínio de plantas C3 no início do Holoceno em ambos os ecótonos. Entre aproximadamente 7.000-3.000 anos AP verificou-se a influência crescente de plantas C4, indicando regressão da floresta com possível presença de um clima mais seco. A partir de aproximadamente 3.000 anos AP os dados sugeriram expansão da floresta provavelmente relacionada ao retorno a um clima mais úmido. A presença de algumas espécies características da borda, como a Sclerolobium paniculatum e Himatanthus sucuuba, nos campos, sugere o atual avanço da floresta sobre os mesmos. Estas espécies estariam sendo as bioindicadoras desse avanço.This paper presents a comparative study between organic soil horizons formed in depressions located at the forest/savanna boundary in the Southern Amazon Basin. The influence of the paleovegetation dynamics, based on carbon isotope (12C, 13C and 14C data of soil organic matter (SOM and plants was evaluated, as well as the present vegetation dynamics, inferred from the modern vegetation structure, composition and phytosociology. The uppermost soil horizon in savanna showed higher total carbon content than in forest. 13C and 14C data from soil samples indicated a predominance of C3 plants in the early

  1. The deepwater Gulf of Mexico : promises delivered?

    International Nuclear Information System (INIS)

    Pickering, D.R.

    1999-01-01

    A summary review of deepwater Gulf of Mexico (GOM) oil production was presented for the years 1989 to 1998. Trends and prospects in deepwater GOM production and leasing were assessed. Promises and forecasts made in the early 1990s were compared with what actually happened since then. Forecasts in the early 1990s promised deeper, faster and cheaper developments in the deepwater Gulf. Results of the comparison showed that the prognosticators were correct on all three counts. Regarding the future of the Gulf, one can be justified in being optimistic in so far as more experience, robust economics, more and cheaper rigs can be taken as reliable indicators of optimism. In contrast, there are certain negatives to consider, such as low commodity prices, budget constraints, lease expirations, technical challenges and increased competition. . 12 figs

  2. Systematic approach to the treatment of crude oil produced by small concessionaires in marginal areas of the Reconcavo Basin; Abordagem sistematizada para o tratamento do oleo produzido em campos marginais da Bacia do Reconcavo por pequenos concessionarios

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Edson Jorge Alves [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Engenharia Quimica; Araujo, Marcia Queiroz de [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Engenharia Quimica; Ferreira, Doneivan Fernandes [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Geologia e Geofisica Aplicada

    2008-07-01

    The establishment of the 'Petroleum Law' (Law No. 9.478/97) abolished the Exploration and Production State Monopoly in Brazil. Attaining concessions through the bidding rounds promoted by the Brazilian Petroleum Agency (ANP) became the only legal means for exploring and/or producing oil and natural gas in Brazil. In order to attract small and medium companies to this niche, inactive areas with marginal accumulations were offered by the Agency. These areas were returned to ANP by PETROBRAS. Currently, six small companies operate in the Reconcavo Oil Province, extracting and processing different types of oil. The available infrastructure is mostly deteriorated and obsolete. Additionally, there are serious limitations in the separation and storage capacity. This scenario resulted in the fragmentation of the old PETROBRAS production infrastructure. A possible solution to this problem could involve the establishment of a collective treatment unit which would work as a condominium. However, the operation of this plant must take into account the diversity of oils being produced in the Reconcavo Basin (physical-chemicals characteristics). This paper is aimed at (1) establishing a preliminary characterization of the different types of oil which will be delivered by local producers; (2) the critical variables for the oil model (it includes all oils received from different areas of the Reconcavo); (3) the identification of the main stake holders within this process; and (4) suggestions for operating models for the treatment unit taking into account the potential innovations and opportunities for R and D and spin-offs. (author)

  3. Deepwater Horizon Seafood Safety Response - Deepwater Horizon Oil Spill Seafood Safety Response

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In the aftermath of the Deepwater Horizon oil spill in 2010, there was concern about the risk to human health through consumption of contaminated seafood from the...

  4. Deepwater Gulf of Mexico more profitable than previously thought

    International Nuclear Information System (INIS)

    Craig, M.J.K.; Hyde, S.T.

    1997-01-01

    Economic evaluations and recent experience show that the deepwater Gulf of Mexico (GOM) is much more profitable than previously thought. Four factors contributing to the changed viewpoint are: First, deepwater reservoirs have proved to have excellent productive capacity, distribution, and continuity when compared to correlative-age shelf deltaic sands. Second, improved technologies and lower perceived risks have lowered the cost of floating production systems (FPSs). Third, projects now get on-line quicker. Fourth, a collection of other important factors are: Reduced geologic risk and associated high success rates for deepwater GOM wells due primarily to improved seismic imaging and processing tools (3D, AVO, etc.); absence of any political risk in the deepwater GOM (common overseas, and very significant in some international areas); and positive impact of deepwater federal royalty relief. This article uses hypothetical reserve distributions and price forecasts to illustrate indicative economics of deepwater prospects. Economics of Shell Oil Co.'s three deepwater projects are also discussed

  5. Mechanical Characteristics of Some Deepwater Floater

    DEFF Research Database (Denmark)

    Chen, Zhen-Zhe; Tarp-Johansen, Niels Jacob; Jensen, Jørgen Juncher

    2006-01-01

    This paper presents an initial study of the mechanical characteristics of some deepwater floater designs for offshore wind turbines. Three different concepts (NREL TLP, Dutch Trifloater, and Japanese SPAR) are summarized, based on data from the available studies. A 5 MW Horizontal Axis Wind Turbine...

  6. Produced water reinjection in Campos Basin; Reinjecao de agua produzida na Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Mendes, Roberta A.; Furtado, Claudio J.A.; Luz Junior, Euripedes B. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    To manage the increasing volume of produced water became one of the main challenges in the petroleum industry. PWRI (produced water re-injection) leads to a decrease operational cost in platforms, an increase in liquid flow rates on the topside facilities and a decrease in surface disposal of water. Nowadays in Brazilian fields for every barrel of produced oil three barrels of water need to be handled. PWRI is a process that has been widely diffused in many fields in the world. The main advantages of the PWRI are to reduce collected water, to decrease or eliminate surface disposal of produced water, and to help oil recovery. On the other hand, PWRI tends to increase corrosion when inappropriate materials in tubing and pipelines are used; increase souring potential due to the amount of nutrients for bacteria in the produced water; increase scale formation when sea-water and produced water are mixed and increase formation damage. Even in reservoirs with good qualities in terms of permeability and porosity, the poor quality of the reinjection water decreases injectivity. To minimize injectivity loss some requirements are important: to avoid solids in the produced water system, to inject above fracture propagation pressure to maintain injectivity whenever possible, to use compatible the chemical products for oil-water separation to avoid the formation solids-oil agglomerates. (author)

  7. Deepwater Horizon Accident Investigation Report

    International Nuclear Information System (INIS)

    2010-09-01

    On the evening of April 20, 2010, a well control event allowed hydrocarbons to escape from the Macondo well onto Transocean's Deepwater Horizon, resulting in explosions and fire on the rig. Eleven people lost their lives, and 17 others were injured. The fire, which was fed by hydrocarbons from the well, continued for 36 hours until the rig sank. Hydrocarbons continued to flow from the reservoir through the wellbore and the blowout preventer (BOP) for 87 days, causing a spill of national significance. BP Exploration and Production Inc. was the lease operator of Mississippi Canyon Block 252, which contains the Macondo well. BP formed an investigation team that was charged with gathering the facts surrounding the accident, analyzing available information to identify possible causes and making recommendations to enable prevention of similar accidents in the future. The BP investigation team began its work immediately in the aftermath of the accident, working independently from other BP spill response activities and organizations. The ability to gather information was limited by a scarcity of physical evidence and restricted access to potentially relevant witnesses. The team had access to partial real-time data from the rig, documents from various aspects of the Macondo well's development and construction, witness interviews and testimony from public hearings. The team used the information that was made available by other companies, including Transocean, Halliburton and Cameron. Over the course of the investigation, the team involved over 50 internal and external specialists from a variety of fields: safety, operations, subsea, drilling, well control, cementing, well flow dynamic modeling, BOP systems and process hazard analysis. This report presents an analysis of the events leading up to the accident, eight key findings related to the causal chain of events and recommendations to enable the prevention of a similar accident. The investigation team worked separately

  8. Deepwater Horizon Accident Investigation Report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-09-15

    On the evening of April 20, 2010, a well control event allowed hydrocarbons to escape from the Macondo well onto Transocean's Deepwater Horizon, resulting in explosions and fire on the rig. Eleven people lost their lives, and 17 others were injured. The fire, which was fed by hydrocarbons from the well, continued for 36 hours until the rig sank. Hydrocarbons continued to flow from the reservoir through the wellbore and the blowout preventer (BOP) for 87 days, causing a spill of national significance. BP Exploration and Production Inc. was the lease operator of Mississippi Canyon Block 252, which contains the Macondo well. BP formed an investigation team that was charged with gathering the facts surrounding the accident, analyzing available information to identify possible causes and making recommendations to enable prevention of similar accidents in the future. The BP investigation team began its work immediately in the aftermath of the accident, working independently from other BP spill response activities and organizations. The ability to gather information was limited by a scarcity of physical evidence and restricted access to potentially relevant witnesses. The team had access to partial real-time data from the rig, documents from various aspects of the Macondo well's development and construction, witness interviews and testimony from public hearings. The team used the information that was made available by other companies, including Transocean, Halliburton and Cameron. Over the course of the investigation, the team involved over 50 internal and external specialists from a variety of fields: safety, operations, subsea, drilling, well control, cementing, well flow dynamic modeling, BOP systems and process hazard analysis. This report presents an analysis of the events leading up to the accident, eight key findings related to the causal chain of events and recommendations to enable the prevention of a similar accident. The investigation team worked

  9. Installation Capacity Assessment of Damaged Deepwater Pipelines

    Directory of Open Access Journals (Sweden)

    Ramasamy R.

    2014-07-01

    Full Text Available The worldwide exploration and development of subsea and deepwater reservoirs has laid down some new and old engineering challenges to the offshore pipeline industry. This requires large D/t pipelines to be installed at water depths in the vicinity of up to 2700m. The deepwater collapse and buckle propagation event is almost unavoidable as the pipe wall thickness cannot be always determined from the codes and standards due to the limit state criteria. These codes also do not consider any fabrication imperfections and sustained damages emanating from transportation and handling. The objective of this paper is to present the Finite Element Analysis (FEA of dented pipes with D/t ratio more than 45, which is outside the applicability of current design codes, and to investigate the effects on installation capacity of these various damage sizes in terms of collapse and buckle propagation.

  10. Deepwater Gulf of Mexico: high prospects

    International Nuclear Information System (INIS)

    Kirkland, G.

    2000-01-01

    The present and future role of the deepwater Gulf of Mexico to meeting natural gas requirements of the United States are reviewed.The steady increase in U.S. demand, outpacing U.S.supply for over 10 years and the increasing reliance by the USA on Canadian exports is demonstrated in conjunction with the '30 Tcf Challenge'. Regarding the Gulf of Mexico specifically, it is estimated that to meet expectations, production there needs to grow to 22 Bcfpd by 2020, especially the deepwater pools which have a potential of 80 to 140 Tcf over the next 50 years. These pools already produce as much oil as the shelf region, but only 25 per cent as much gas. To produce the expected 7 to 12 Bcfpd oil production must reach 4 million barrel of oil per day, which involves cycle time, new technologies and cost challenges. Much of the new technology needed is related to cutting costs and while good progress is being made, it is argued that further gains could occur if international technology were applied in the Gulf. The rate of success in exploration has also improved, with over one billion barrels of deepwater discoveries per year over the last four years. Cycle times have also improved, although the impact of cycle time in the deeper water regions is cause for some concern. The overall assessment is that to get the gas, one has to get the oil first, meaning that deepwater success is more dependent on oil prices than on gas prices. Nevertheless, the need for developing and applying new technologies remains paramount, including the application of existing foreign technologies that have proven successful elsewhere. It is equally important to demonstrate a high level of environmental stewardship, and to continue focusing on cycle time, including access to prospective acreage, a well-trained workforce, and reasonable regulatory and permitting requirements

  11. Fate of dispersants associated with the deepwater horizon oil spill.

    Science.gov (United States)

    Kujawinski, Elizabeth B; Kido Soule, Melissa C; Valentine, David L; Boysen, Angela K; Longnecker, Krista; Redmond, Molly C

    2011-02-15

    Response actions to the Deepwater Horizon oil spill included the injection of ∼771,000 gallons (2,900,000 L) of chemical dispersant into the flow of oil near the seafloor. Prior to this incident, no deepwater applications of dispersant had been conducted, and thus no data exist on the environmental fate of dispersants in deepwater. We used ultrahigh resolution mass spectrometry and liquid chromatography with tandem mass spectrometry (LC/MS/MS) to identify and quantify one key ingredient of the dispersant, the anionic surfactant DOSS (dioctyl sodium sulfosuccinate), in the Gulf of Mexico deepwater during active flow and again after flow had ceased. Here we show that DOSS was sequestered in deepwater hydrocarbon plumes at 1000-1200 m water depth and did not intermingle with surface dispersant applications. Further, its concentration distribution was consistent with conservative transport and dilution at depth and it persisted up to 300 km from the well, 64 days after deepwater dispersant applications ceased. We conclude that DOSS was selectively associated with the oil and gas phases in the deepwater plume, yet underwent negligible, or slow, rates of biodegradation in the affected waters. These results provide important constraints on accurate modeling of the deepwater plume and critical geochemical contexts for future toxicological studies.

  12. Innovation gets to the bottom of Brazil's deepwater challenge; Lifting deepwater

    Energy Technology Data Exchange (ETDEWEB)

    2010-07-01

    Cargotec makes access to Brazil's deep waters possible with innovative offshore technology such as MacGregor ultra-deepwater lifting system, which replaces heavy steel wire with multi-component fibre rope that weights nothing in water. (Author)

  13. Tuberculosis pulmonar de campos inferiores

    Directory of Open Access Journals (Sweden)

    Alejandra González

    2010-10-01

    Full Text Available La tuberculosis (TB que compromete sólo los campos pulmonares inferiores (TBCI es poco frecuente en el adulto y en general está asociada a alguna causa de inmunodepresión. El objetivo de nuestro trabajo fue determinar la incidencia de TBCI en nuestra población y comparar sus características respecto de la TB pulmonar de localización habitual. Se estudiaron en forma retrospectiva en el período de 2004 a 2008, 42 pacientes con TBCI que fueron comparados con 84 pacientes con TB pulmonar de localización habitual (grupo control. Se excluyeron pacientes con HIV. La TBCI representó el 6% del total de TB pulmonar. No se encontraron diferencias significativas en cuanto a edad, sexo, presencia de cavidades en la radiografía, días de evolución y nivel de albúmina. La TBCI tuvo significativamente mayor proporción de comorbilidades (p < 0.001, presencia de condensación (p < 0.001 y compromiso unilateral (p < 0.001 en la radiografía de tórax, junto con mayor número de internaciones (p = 0.02. Cabe destacar que sólo16 de los 42 pacientes con TBCI (38% tenían alguna comorbilidad demostrada. La TBCI puede presentarse aun sin comorbilidades asociadas y debe sospecharse en neumonías de evolución tórpida independientemente de su localización.

  14. Gibberellin biosynthesis and signal transduction is essential for internode elongation in deepwater rice.

    Science.gov (United States)

    Ayano, Madoka; Kani, Takahiro; Kojima, Mikiko; Sakakibara, Hitoshi; Kitaoka, Takuya; Kuroha, Takeshi; Angeles-Shim, Rosalyn B; Kitano, Hidemi; Nagai, Keisuke; Ashikari, Motoyuki

    2014-10-01

    Under flooded conditions, the leaves and internodes of deepwater rice can elongate above the water surface to capture oxygen and prevent drowning. Our previous studies showed that three major quantitative trait loci (QTL) regulate deepwater-dependent internode elongation in deepwater rice. In this study, we investigated the age-dependent internode elongation in deepwater rice. We also investigated the relationship between deepwater-dependent internode elongation and the phytohormone gibberellin (GA) by physiological and genetic approach using a QTL pyramiding line (NIL-1 + 3 + 12). Deepwater rice did not show internode elongation before the sixth leaf stage under deepwater condition. Additionally, deepwater-dependent internode elongation occurred on the sixth and seventh internodes during the sixth leaf stage. These results indicate that deepwater rice could not start internode elongation until the sixth leaf stage. Ultra-performance liquid chromatography tandem mass-spectrometry (UPLC-MS/MS) method for the phytohormone contents showed a deepwater-dependent GA1 and GA4 accumulation in deepwater rice. Additionally, a GA inhibitor abolished deepwater-dependent internode elongation in deepwater rice. On the contrary, GA feeding mimicked internode elongation under ordinary growth conditions. However, mutations in GA biosynthesis and signal transduction genes blocked deepwater-dependent internode elongation. These data suggested that GA biosynthesis and signal transduction are essential for deepwater-dependent internode elongation in deepwater rice. © 2014 The Authors. Plant, Cell & Environment published by John Wiley & Sons Ltd.

  15. Recent changes in the deep-water fish populations of Lake Michigan

    Science.gov (United States)

    Moffett, James W.

    1957-01-01

    The deep-water fish fauna of Lake Michigan consisted of lake trout (Salvelinus namaycush), burbot (Lota lota maculosa), seven species of chubs or deep-water ciscoes (Leucichthys spp.), and the deep-water sculpin (Myoxocephalus quadricornis). Other species occupied the deep-water zone but were not typically part of the fauna.

  16. Deepwater drilling; Jakten paa de store dyp

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    Recent technological development has made it possible to drill for oil and gas at the impressive depth of 3000 metres. An increasing part of the world's oil and gas discoveries are made in deep or ultra deep waters. Ultra deep waters are those exceeding 1500 metres. Since drilling at more than 500 metres started at the end of the 1970s, 32 discoveries of about 500 million barrels of extractable oil or gas have been made. These finds amount to almost 60 thousand millions barrels of oil equivalents. Most of the effort has been made in the coasts between Brazil, West Africa and the Gulf of Mexico. Deepwater projects have been a field of priority for Norwegian oil companies in their search for international commissions. It is frequently time-consuming, expensive and technologically challenging to drill at great depths. The article describes the Atlantis concept, which may reduce the complexities and costs of deepwater activities. This involves making an artificial sea bottom, which in the form of an air-filled buoy is anchored at a depth of 200 - 300 metres. Production wells or exploration wells and risers are extended from the real bottom to the artificial one.

  17. Deep-Water Resedimented Carbonate Exploration Play Types: Controls and Models

    Science.gov (United States)

    Minzoni, M.; Janson, X.; Kerans, C.; Playton, T.; Winefield, P.; Burgess, P. M.

    2016-12-01

    Deepwater resedimented deposits have been described in both modern and ancient carbonate sequences, many with good reservoir potential, for example the giant Cretaceous Poza Rica field in Mexico ( 40 MMBoe), the Mississippian Tangiz field in Kazakhstan, and several fields in the U.S. Permian basin (several Tcf gas). Nevertheless, carbonate slope and basin systems remain poorly understood when compared to their siliciclastic counterparts. Legacy published and unpublished work, combined with a global database of surface and sub-surface examples of resedimented carbonates, has highlighted that downslope resedimentation of carbonate material is in large part controlled by the evolution of the parent platform margin, which in turn is best characterized in terms of various controlling processes such as the carbonate factory type, tectonic setting, eustatic variations, and prevailing wind direction and ocean current patterns. Two generic play types emerge: (i) attached carbonate slope play -developed immediately adjacent to the parent carbonate platform and dominated by rock fall and platform collapse deposits or in situ boundstone; and (ii) detached carbonate slope play - deposited further from the platform margin via channelized turbidity currents and other mass-flow processes. High-rising, steep, bypass platform margins with collapse scars and grain-dominated factories have the highest potential to generate channelized and detached deep-water reservoirs with high initial porosity and permeability. Best reservoirs are aragonitic grainstones transported from the platform into the adjacent basin, and undergoing dissolution in submarine undersaturated water with early formation of secondary porosity to further enhance reservoir properties. Any exploration model aiming at identifying potential resedimented carbonate plays should be based on carbonate platform configurations and factory types favorable for re-sedimentation of large sedimentary bodies and preservation or

  18. Campo eletromagnético de uma carga em queda livre num campo gravitacional uniforme

    OpenAIRE

    Goto, Mario

    2010-01-01

    As transformações de Rindler são usadas para obter o campo eletromagnético de uma carga em queda livre num campo gravitacional uniforme. Electromagnetic field of free falling charge in an uniform gravitational field is obtained using Rindler transformations.

  19. AUV Applications for Deepwater Exploration and production

    Energy Technology Data Exchange (ETDEWEB)

    Dawsom, Ila

    2003-07-01

    A great deal of AUV technology development has taken place in the last 20 years, and vehicles have been built and proven in some of the most challenging environments. Much of this development has been for military and environmental monitoring purposes. BP pursued the development of autonomous underwater vehicle (AUV) technology for deepwater seabed survey work from 1997. There was a need to obtain better data due to increased seabed complexity, preserve the integrity of the seabed and deliver large programs at a faster pace. En 2001 the first commercial survey was carried out using this technology, and since then many deepwater surveys have been carried out using AUV systems. The result has been faster, less expensive surveys and higher quality data. The AUV was able to offer a solution to deep water acquisition problems as the vehicles actively work to stay on the proposed survey lines - compensating for near sea floor currents, and automatically maintaining a fixed altitude to the seabed thus producing more even datasets, allowing easier processing and analysis of sonar and profiler images. All with much reduced support vessel costs. The focus has since turned to AUV application for underwater inspection and intervention within BP The view had always been that survey vehicles would lead to inspection and eventually intervention-capable autonomous vehicles, and this needled to be explored in more detail. In 2002 BP used the CandC Technologies Hugin 3000 vehicle to survey a pipeline in deepwater Gulf of Mexico - the first time an AUV had been used for pipeline inspection. The success of this survey has allowed an assessment of how closely actual pipe behaviour follows that predicted by design analysis, and has also demonstrated the potential of AUVs to offer a lower cost solution to pipeline inspection and integrity monitoring throughout the field life. A detailed study into the technologies required to perform a range of underwater inspection and intervention

  20. Sediment Sampling Data for BP Spill/Deepwater Horizon

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Deepwater Horizon oil spill (also referred to as the BP oil spill) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect. Following...

  1. Air Sampling Data for BP Spill/Deepwater Horizon

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Deepwater Horizon oil spill (also referred to as the BP oil spill) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect. Following...

  2. Waste Sampling Data for BP Spill/Deepwater Horizon

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Deepwater Horizon oil spill (also referred to as the BP oil spill) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect. Following...

  3. Air Monitoring Data for BP Spill/Deepwater Horizon

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Deepwater Horizon oil spill (also referred to as the BP oil spill) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect. Following...

  4. Surface Water Sampling Data for BP Spill/Deepwater Horizon

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Deepwater Horizon oil spill (also referred to as the BP oil spill) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect. Following...

  5. Water Sampling Data for BP Spill/Deepwater Horizon

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Deepwater Horizon oil spill (also referred to as the BP oil spill) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect. Following...

  6. DEEPWATER AND NEARSHORE FOOD WEB CHARACTERIZATIONS IN LAKE SUPERIOR

    Science.gov (United States)

    Due to the difficulty associated with sampling deep aquatic systems, food web relationships among deepwater fauna are often poorly known. We are characterizing nearshore versus offshore habitats in the Great Lakes and investigating food web linkages among profundal, pelagic, and ...

  7. Augusto de Campos tradutor de Emily Dickinson

    Directory of Open Access Journals (Sweden)

    Fernanda Maria Alves Lourenço

    2015-04-01

    Full Text Available http://dx.doi.org/10.5007/2175-7968.2015v35n2p161 Este artigo objetiva analisar a tradução de duas poesias de Emily Dickinson (1830-1886 realizada por Augusto de Campos (1931 e publicada em 2008 na coletânea Emily Dickinson: Não sou ninguém.  Inicialmente serão apresentados alguns elementos da poética de Dickinson, a partir de Gilbert e Gubar (1984, Donoghue (1969, Sewall (1963 e Daghlian (1987. Em seguida, será dada ênfase à figura de Augusto de Campos como poeta e como tradutor, com ênfase nos seus comentários sobre tradução, visando compreender sua prática tradutória. (CAMPOS, 2004; 2006; 2008 Por fim, será analisada a tradução de duas poesias de Dickinson realizada por Augusto de Campos, buscando identificar a relação entre a teoria e a prática do tradutor. Essa análise, de caráter discursivo, além do plano formal e sintático, busca verificar o plano semântico dos textos, e ressalta que não tem a pretensão de realizar qualquer tipo de julgamento prescritivo.

  8. Temas de Física para Ingeniería: Campos escalares y vectoriales

    OpenAIRE

    Beléndez, Augusto; Bernabeu, Guillermo; Pastor Antón, Carlos

    1988-01-01

    Magnitudes, vectores y campos: "Campos escalares y vectoriales". Campo escalar y campo vectorial. Cálculo vectorial infinitesimal: operadores. Representación vectorial de una superficie. Integración de campos vectoriales. Relaciones entre los campos escalares y vectoriales. Clasificación de los campos vectoriales.

  9. The structure and stratigraphy of deepwater Sarawak, Malaysia: Implications for tectonic evolution

    Science.gov (United States)

    Madon, Mazlan; Kim, Cheng Ly; Wong, Robert

    2013-10-01

    The structural-stratigraphic history of the North Luconia Province, Sarawak deepwater area, is related to the tectonic history of the South China Sea. The Sarawak Basin initiated as a foreland basin as a result of the collision of the Luconia continental block with Sarawak (Sarawak Orogeny). The foreland basin was later overridden by and buried under the prograding Oligocene-Recent shelf-slope system. The basin had evolved through a deep foreland basin ('flysch') phase during late Eocene-Oligocene times, followed by post-Oligocene ('molasse') phase of shallow marine shelf progradation to present day. Seismic interpretation reveals a regional Early Miocene Unconformity (EMU) separating pre-Oligocene to Miocene rifted basement from overlying undeformed Upper Miocene-Pliocene bathyal sediments. Seismic, well data and subsidence analysis indicate that the EMU was caused by relative uplift and predominantly submarine erosion between ˜19 and 17 Ma ago. The subsidence history suggests a rift-like subsidence pattern, probably with a foreland basin overprint during the last 10 Ma. Modelling results indicate that the EMU represents a major hiatus in the sedimentation history, with an estimated 500-2600 m of missing section, equivalent to a time gap of 8-10 Ma. The EMU is known to extend over the entire NW Borneo margin and is probably related to the Sabah Orogeny which marks the cessation of sea-floor spreading in the South China Sea and collision of Dangerous Grounds block with Sabah. Gravity modelling indicates a thinned continental crust underneath the Sarawak shelf and slope and supports the seismic and well data interpretation. There is a probable presence of an overthrust wedge beneath the Sarawak shelf, which could be interpreted as a sliver of the Rajang Group accretionary prism. Alternatively, magmatic underplating beneath the Sarawak shelf could equally explain the free-air gravity anomaly. The Sarawak basin was part of a remnant ocean basin that was closed by

  10. QUAL O FUTURO DAS ESCOLAS NO CAMPO?

    Directory of Open Access Journals (Sweden)

    Célia Regina Vendramini

    2015-09-01

    Full Text Available RESUMO:Tendo como ponto de partida a questão sobre o futuro das escolas rurais ou do campo, o artigo aborda o contexto social, político e econômico que suporta ou não a existência das escolas, bem como uma análise sobre a situação das escolas em diferentes contextos, particularmente no Brasil, em Portugal e nos Estados Unidos. Problematizamos as respostas dadas pelo poder público, acadêmicos e organizações e movimentos sociais sobre o fechamento, a redução do número de alunos e de comunidades rurais com escola, as condições de funcionamento, a distância percorrida pelos alunos, além das implicações das escolas para a vitalidade do campo. Concluímos que o futuro das escolas está diretamente relacionado com o futuro do campo.

  11. Recycled residues: a new frontier to the citizenship; Residuos reciclaveis na Bacia de Campos: uma nova fronteira para a cidadania

    Energy Technology Data Exchange (ETDEWEB)

    Cunha, Joao Guilherme Ribeiro da [PETROBRAS, Rio de Janeiro, RJ (Brazil). CEMPRE - Compromisso Empresarial para Reciclagem

    2004-07-01

    The Selective Collection Program of the Campos Basin, implanted in May 1996, aims to devote adequately the recyclable waste generated at the site of PETROBRAS in the Campos Basin and the rescue environmental awareness with the practice of not wasting materials classified as recyclable. It is always to remember that education is the basis for everything and that the results of investments in environmental education be perceived slow, and takes time and perseverance. The structure of the Selective Collection Program consists of the separation of waste at source, transportation, segregation, storage and appropriate final destination. The PETROBRAS has important role in this context, reinforcing its compromise to quality of local communities life with social and environmental responsibility. (author)

  12. The role of deep-water sedimentary processes in shaping a continental margin: The Northwest Atlantic

    Science.gov (United States)

    Mosher, David C.; Campbell, D.C.; Gardner, J.V.; Piper, D.J.W.; Chaytor, Jason; Rebesco, M.

    2017-01-01

    The tectonic history of a margin dictates its general shape; however, its geomorphology is generally transformed by deep-sea sedimentary processes. The objective of this study is to show the influences of turbidity currents, contour currents and sediment mass failures on the geomorphology of the deep-water northwestern Atlantic margin (NWAM) between Blake Ridge and Hudson Trough, spanning about 32° of latitude and the shelf edge to the abyssal plain. This assessment is based on new multibeam echosounder data, global bathymetric models and sub-surface geophysical information.The deep-water NWAM is divided into four broad geomorphologic classifications based on their bathymetric shape: graded, above-grade, stepped and out-of-grade. These shapes were created as a function of the balance between sediment accumulation and removal that in turn were related to sedimentary processes and slope-accommodation. This descriptive method of classifying continental margins, while being non-interpretative, is more informative than the conventional continental shelf, slope and rise classification, and better facilitates interpretation concerning dominant sedimentary processes.Areas of the margin dominated by turbidity currents and slope by-pass developed graded slopes. If sediments did not by-pass the slope due to accommodation then an above grade or stepped slope resulted. Geostrophic currents created sedimentary bodies of a variety of forms and positions along the NWAM. Detached drifts form linear, above-grade slopes along their crests from the shelf edge to the deep basin. Plastered drifts formed stepped slope profiles. Sediment mass failure has had a variety of consequences on the margin morphology; large mass-failures created out-of-grade profiles, whereas smaller mass failures tended to remain on the slope and formed above-grade profiles at trough-mouth fans, or nearly graded profiles, such as offshore Cape Fear.

  13. Patterns of stress field orientations, structures, basement structural heritage and tectonic evolution of the Camamu and Reconcavo South Basins, Palm Tree's coastline, Bahia, Brazil; Padroes de orientacao dos campos de tensao, estruturas, heranca do embasamento e evolucao tectonica das bacias de Camamu e porcao sul do Reconcavo, Costa do Dende, Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Correa-Gomes, Luiz Cesar [Centro Federal de Educacao Tecnologica da Bahia, Salvador, BA (Brazil). Dept. de Ciencias Aplicadas]. E-mails: gomes@cefetba.br, lccgomes@ufba.br; Dominguez, Jose Maria Landim; Barbosa, Johildo Salomao Figueiredo; Silva, Idney Cavalcanti da; Pinto, Moises Vieira [Universidade Federal da Bahia (UFBA), Campus de Ondina, Salvador, BA (Brazil). Inst. de Geociencias. Dept. de Geologia]. E-mails: jose_landim@uol.com.br; johildo@cpgg.ufba.br; idney25@ig.com.br

    2005-12-15

    The Camamu and Reconcavo South Basins are located near the passive continental margin of the Bahia State, Brazil, and have high potential for hydrocarbon exploration. In these basins and surrounding basement, brittle and ductile structures were studied, which resulted in 3D stress field orientations by use of inversion methods. From this study, the following results are relevant: important control of the basement structural heritage on the basin formation and evolution; local strike-inversion of {sigma}{sub 1} and {sigma}{sub 3} orientations in transtensive settings; vertical {sigma}{sub 1} typical of extensional regime precedes sub horizontal {sigma}{sub 1} of transtensive one; in relation to basin's long axes, at least four main horizontal {sigma}{sub 1} orientations were obtained, involving parallel, orthogonal and two diagonal sets. This could be related to: parallel and orthogonal flexural stress due to the sedimentary load, local elastic rebound of fault blocks, stress channeling, density contrasts between oceanic and continental crusts and ridge pull of the adjacent oceanic plate; diagonals, due to a combination of first order regional and second order local stress fields. This suggest that the continental margin of the Bahia State evolves from a typical passive into a transtensive margin, with transpressive regime that have been observed in some places, in a classical evolution of the Wilson Cycle. (author)

  14. Deepwater extended well testing in the Gulf of Mexico

    International Nuclear Information System (INIS)

    Cribbs, M.E. Jr.; Voss, J.D.; DeCarlo, L.J.

    1993-01-01

    This paper examines deepwater Gulf of Mexico well testing and the need for extended well testing from the oil company's perspective. Well test objectives together with possible facility arrangements are examined as they integrate with the DeepStar project's modular field development facility arrangement

  15. GB 388 -- An independent's approach to deepwater development

    International Nuclear Information System (INIS)

    Blincow, R.M.; Whittenburg, L.A.; Pickard, R.D.

    1995-01-01

    As the oil industry moves toward greater water depths in search of viable investment opportunities, cost effective, fast track development schemes must be cultivated to overcome the economic obstacles inherent to deepwater field development. While every deepwater development is different and each presents its own unique problems, the dilemma of justifying the costs, minimizing the lead time to first revenue and minimizing the associated risk are common to all projects. The Garden Banks 388 project has successfully utilized the project management concepts, and methodologies presented in this paper to develop a relatively low cost, low risk, fast track approach to deepwater development in the Gulf of Mexico. This paper describes the production system concept, management style and philosophy which have been employed to develop Garden Banks 388. The paper also discusses why the Floating Production System is considered the best alternative for this particular application. Many of the ideas and strategies used in this project can be applied to any project, whether it be deepwater or more conventional types of projects

  16. 77 FR 63300 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2012-10-16

    ...-deepwater architecture and technology to the Secretary of Energy and provide comments and recommendations... business. Individuals who would like to attend must RSVP by email at: [email protected] no later... your request for an oral statement at least three business days prior to the meeting, and reasonable...

  17. 77 FR 10487 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2012-02-22

    ... development and implementation of programs related to ultra-deepwater architecture and technology to the... Committee will lead the meeting for the orderly conduct of business. Individuals who would like to attend... telephone number listed above. You must make your request for an oral statement at least three business days...

  18. 76 FR 16621 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2011-03-24

    ... implementation of programs related to ultra-deepwater architecture and technology to the Secretary of Energy and... orderly conduct of business. If you would like to file a written statement with the Committee, you may do.... You must make your request for an oral statement at least two business days prior to the meeting, and...

  19. 77 FR 53191 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2012-08-31

    ... Secretary of Energy on development and implementation of programs related to ultra-deepwater architecture... Chairman of the Committee will lead the meeting for the orderly conduct of business. If you would like to... three business days prior to the meeting, and reasonable provisions will be made to include all who wish...

  20. 77 FR 5246 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2012-02-02

    ... development and implementation of programs related to ultra-deepwater architecture and technology to the... least three business days prior to the meeting, and reasonable provisions will be made to include all... meeting to facilitate the orderly conduct of business. Public comment will follow the three-minute rule...

  1. 76 FR 13606 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2011-03-14

    ... programs related to ultra-deepwater architecture and technology to the Secretary of Energy and provide... conduct of business. If you would like to file a written statement with the Committee, you may do so... must make your request for an oral statement at least two business days prior to the meeting, and...

  2. 78 FR 70931 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2013-11-27

    ... ultra-deepwater architecture and technology to the Secretary of Energy and provide comments and... business. Individuals who would like to attend must RSVP to [email protected] no later than 5:00 p... an oral statement at least three business days prior to the meeting, and reasonable provisions will...

  3. 78 FR 58292 - Ultra-Deepwater Advisory Committee

    Science.gov (United States)

    2013-09-23

    ...-deepwater architecture and technology to the Secretary of Energy and provide comments and recommendations... the orderly conduct of business. Individuals who would like to attend must RSVP by email to: Ultra... number listed above. You must make your request for an oral statement at least three business days prior...

  4. Evidence of Enhanced Respired Carbon in Eastern Equatorial Pacific Deep-Waters over the last 30,000 years

    Science.gov (United States)

    Umling, N. E.; Thunell, R.

    2016-12-01

    Rapid decreases in glacial deep water reservoir ages have been observed in the Eastern Equatorial Pacific (EEP; this study), North Pacific (Rae et al., 2014), Southwest Pacific (Sikes et al., 2016), and North Atlantic (Skinner et al., 2013). It has been hypothesized that release of a deep ocean 14C-depleted, respired-carbon reservoir to the surface ocean and atmosphere is the most likely mechanism for the observed increases in atmospheric CO2 concentrations recorded in ice cores during the last glacial-interglacial transition (Broecker and Barker, 2007). This study examines whether oxygenation, organic carbon flux, and carbonate chemistry in the EEP deep-waters reflect an increase in respired carbon associated with recorded 14C-depletions using isotopic and trace element records from three Panama Basin cores (2,650-3,200 m water-depth). An increase in glacial deep-water respired carbon storage would result in a shift of DIC speciation towards lower carbonate ion concentrations along with deoxygenation of bottom waters. Specifically, we use the boron to calcium (B/Ca) and uranium to calcium (U/Ca) ratios of the benthic foraminifera Cibicidoides wuellerstorfi to reconstruct deep-water carbonate ion concentration (Yu and Elderfield, 2007; Raizsch et al., 2011). Additionally, bottom water oxygenation is estimated from the difference in δ13C of benthic foraminifera living in pore waters at the anoxic boundary and of those living in bottom water (Δ δ13C; Hoogakker et al., 2015, 2016), while carbon flux was assessed from the U/Ca and Cd/Ca of foraminiferal authigenic coatings.

  5. El creciente campo de los Estudios Sensoriales

    Directory of Open Access Journals (Sweden)

    David Howes

    2014-09-01

    Full Text Available Este ensayo presenta una breve descripción acerca del giro sensorial en la investigación contemporánea, y propone algunas perspectivas de trabajo para futuras investigaciones. Esta labor no pretende ser exhaustiva y, más bien, busca indicar las principales tendencias en este campo. El ensayo, en su primera parte, ofrece una mirada general sobre la aparición y el desarrollo de la historia y la antropología de los sentidos. En la segunda parte, la atención se concentra en cómo el campo de los estudios sensoriales puede ser, de otro lado, conceptualizado como compuesto de cultura visual, cultura auditiva (o estudios del sonido, cultura del olfato, cultura del gusto y cultura del tacto. Se ofrece una explicación acerca de la génesis de estas divisiones. Posteriormente, se presenta una visión general de algunas cuestiones claves en los estudios sensoriales, como la pregunta por el número de los sentidos y la relación entre orden sensorial y orden social. El ensayo concluye con ocho proposiciones para los estudios sensoriales.

  6. El creciente campo de los Estudios Sensoriales

    Directory of Open Access Journals (Sweden)

    David Howes

    2014-08-01

    Full Text Available Este ensayo presenta una breve descripción acerca del giro sensorial en la investigación contemporánea, y propone algunas perspectivas de trabajo para futurasinvestigaciones. Esta labor no pretende ser exhaustiva y, más bien, busca indicar las principales tendencias en este campo. El ensayo, en su primera parte, ofrece una mirada general sobre la aparición y el desarrollo de la historia y la antropología de los sentidos. En la segunda parte, la atención se concentra en cómo el campo de los estudios sensoriales puede ser, de otro lado, conceptualizado como compuesto de cultura visual, cultura auditiva (o estudios del sonido, cultura del olfato, cultura del gusto y cultura del tacto. Se ofrece una explicación acerca de la génesis de estas divisiones. Posteriormente,se presenta una visión general de algunas cuestiones claves en los estudios sensoriales, como la pregunta por el número de los sentidos y la relación entre orden sensorial y orden social. El ensayo concluye con ocho proposiciones para los estudios sensoriales.

  7. Injectivity decline prediction for Campos Basin reservoirs; Previsao da perda de injetividade para reservatorios da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Adriano dos [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Bedrikovetsky, Pavel [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil); Furtado, Claudio J.A. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    A simulator for prediction of injectivity decline in perforated water injection wells is presented. The model parameters (filtration and formation damage coefficients) were determined from history data fitting, allowing injectivity decline prediction for various perforated water injectors. The injectivity model, considering both internal and external filtration, fitted the history data very well and allowed a comprehensive analysis of injectivity decline. The simulations revealed that, after the perforations filling, the injectivity decline rate becomes much more intensive. Therefore, the time necessary for perforations filling is an important variable on work over planning. (author)

  8. Survey management in directional wells in Polvo Field - Campos Basin; Gerenciamento de 'surveys' em pocos direcionais no Campo de Polvo - Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Fernando; Antunes, Francisco; Rafainer, Gilberto [HALLIBURTON, Rio de Janeiro, RJ (Brazil). Sperry Drilling Services; Ohara, Shiniti [Devon Energy do Brasil Ltda., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Magnetic Surveying Techniques are fully used in order to control the well path in drilling operations, and electronic tools, known as Measure While Drilling (MWD), uses the intensity and inclination of Earth's magnetic field as a reference for its inputs. These tools have three magnetometers and three accelerometers spaced 90 degrees apart which measure the components of magnetic field and gravitational field to calculate the inclination, the direction of the well, and the tool face orientation. Erroneous readings can occur due to the magnetic interference since the Earth magnetic field can be affected by external sources such as, magnetized materials in the BHA (axial), casings strings or near by wells (cross axial), and these abnormal readings are enough to put the well bore far away from its desired location. In this paper we intend to show the methodology and software usage to allow magnetic field strength exam and identification of systematic failures in mechanization or calibration of the electronics tools. Moreover, the use of enhancements as In-Field Referencing (IFR) or Interpolated In Field Referencing (IIFR) in sensors calculation are described. Furthermore, the results obtained comparing the solutions with gyroscope survey data is shown. (author)

  9. Desagrarización del campo chiapaneco

    Directory of Open Access Journals (Sweden)

    Julieta Martínez Cuero

    2011-06-01

    Full Text Available En este trabajo se analizan las transformaciones del campo chiapaneco a nivel regional. El propósito es evaluar las tesis de una nueva ruralidad y heterogeneidad estructural en el sector rural del estado. Para ello, en primer lugar se describen las condiciones estructurales del sector agrario en la entidad, partiendo de: las condiciones ecológicas y geográficas, el tipo de tenencia de la tierra y la composición poblacional dedicada a la producción agrícola. En segundo lugar, se recogen elementos clave que explican el proceso de desagrarización en cada una de las regiones de análisis, considerando el impacto de las políticas de apertura económica sobre el sector y el agotamiento de la frontera agrícola.

  10. QTL analysis of internode elongation in response to gibberellin in deepwater rice

    OpenAIRE

    Nagai, Keisuke; Kondo, Yuma; Kitaoka, Takuya; Noda, Tomonori; Kuroha, Takeshi; Angeles-Shim, Rosalyn B.; Yasui, Hideshi; Yoshimura, Atsushi; Ashikari, Motoyuki

    2014-01-01

    Gibberellin (GA) is a plant hormone that has important roles in numerous plant developmental phases. Rice plants known as deepwater rice respond to flooding by elongating their internodes to avoid anoxia. Previous studies reported that GA is essential for internode elongation in deepwater rice. Quantitative trait locus (QTL) analyses identified QTLs regulating internode elongation in response to deepwater conditions. However, the interaction between internode elongation and regulators of GA s...

  11. Current status of deepwater oil spill modelling in the Faroe-Shetland Channel, Northeast Atlantic, and future challenges.

    Science.gov (United States)

    Gallego, Alejandro; O'Hara Murray, Rory; Berx, Barbara; Turrell, William R; Beegle-Krause, C J; Inall, Mark; Sherwin, Toby; Siddorn, John; Wakelin, Sarah; Vlasenko, Vasyl; Hole, Lars R; Dagestad, Knut Frode; Rees, John; Short, Lucy; Rønningen, Petter; Main, Charlotte E; Legrand, Sebastien; Gutierrez, Tony; Witte, Ursula; Mulanaphy, Nicole

    2018-02-01

    As oil reserves in established basins become depleted, exploration and production moves towards relatively unexploited areas, such as deep waters off the continental shelf. The Faroe-Shetland Channel (FSC, NE Atlantic) and adjacent areas have been subject to increased focus by the oil industry. In addition to extreme depths, metocean conditions in this region characterise an environment with high waves and strong winds, strong currents, complex circulation patterns, sharp density gradients, and large small- and mesoscale variability. These conditions pose operational challenges to oil spill response and question the suitability of current oil spill modelling frameworks (oil spill models and their forcing data) to adequately simulate the behaviour of a potential oil spill in the area. This article reviews the state of knowledge relevant to deepwater oil spill modelling for the FSC area and identifies knowledge gaps and research priorities. Our analysis should be relevant to other areas of complex oceanography. Crown Copyright © 2017. Published by Elsevier Ltd. All rights reserved.

  12. Deep-water northern Gulf of Mexico hydrocarbon plays

    International Nuclear Information System (INIS)

    Peterson, R.H.; Cooke, D.W.

    1995-01-01

    The geologic setting in the deep-water (depths greater than 1,500 feet) Gulf of Mexico is very favorable for the existence of large, commercial hydrocarbon accumulations. These areas have active salt tectonics that create abundant traps, underlying mature Mesozoic source rocks that can be observed expelling oil and gas to the ocean surface, and good quality reservoirs provided by turbidite sand deposits. Despite the limited amount of drilling in the deep-water Gulf of Mexico, 11 deep-water accumulations have been discovered which, when developed, will rank in the top 100 largest fields in the Gulf of Mexico. Proved field discoveries (those with announced development plans) have added over 1 billion barrels of oil equivalent to Gulf of Mexico reserves, and unproved field discoveries may add to additional billion barrels of oil equivalent. The Minerals Management Service, United States Department of the Interior, has completed a gulf-wide review of over 1,086 oil and gas fields and placed every pay sand in each field into a hydrocarbon play (plays are defined by chronostratigraphy, lithostratigraph, structure, and production). Seven productive hydrocarbon plays were identified in the deep-water northern Gulf of Mexico. Regional maps illustrate the productive limits of each play. In addition, field data, dry holes, and wells with sub-economic pay were added to define the facies and structural limits for each play. Areas for exploration potential are identified for each hydrocarbon play. A type field for each play is chosen to demonstrate the play's characteristics

  13. Submesoscale dispersion in the vicinity of the Deepwater Horizon spill

    OpenAIRE

    Poje, Andrew C.; Özgökmen, Tamay M.; Lipphardt, Bruce L.; Haus, Brian K.; Ryan, Edward H.; Haza, Angelique C.; Jacobs, Gregg A.; Reniers, A. J. H. M.; Olascoaga, Maria Josefina; Novelli, Guillaume; Griffa, Annalisa; Beron-Vera, Francisco J.; Chen, Shuyi S.; Coelho, Emanuel; Hogan, Patrick J.

    2014-01-01

    Reliable forecasts for the dispersion of oceanic contamination are important for coastal ecosystems, society and the economy as evidenced by the Deepwater Horizon oil spill in the Gulf of Mexico in 2010 and the Fukushima nuclear plant incident in the Pacific Ocean in 2011. Accurate prediction of pollutant pathways and concentrations at the ocean surface requires understanding ocean dynamics over a broad range of spatial scales. Fundamental questions concerning the structure of the velocity fi...

  14. Visual sensitivity of deepwater fishes in Lake Superior.

    Directory of Open Access Journals (Sweden)

    Kelly A Harrington

    Full Text Available The predator-prey interactions in the offshore food web of Lake Superior have been well documented, but the sensory systems mediating these interactions remain unknown. The deepwater sculpin, (Myoxocephalus thompsoni, siscowet (Salvelinus namaycush siscowet, and kiyi (Coregonus kiyi inhabit low light level environments. To investigate the potential role of vision in predator-prey interactions, electroretinography was used to determine visual sensitivity for each species. Spectral sensitivity curves revealed peak sensitivity at 525 nm for each species which closely corresponds to the prevalent downwelling light spectrum at depth. To determine if sufficient light was available to mediate predator-prey interactions, visual sensitivity was correlated with the intensity of downwelling light in Lake Superior to construct visual depth profiles for each species. Sufficient daytime irradiance exists for visual interactions to approximately 325 m for siscowet and kiyi and 355 m for the deepwater sculpin during summer months. Under full moon conditions, sufficient irradiance exists to elicit ERG response to light available at approximately 30 m for the siscowet and kiyi and 45 m for the deepwater sculpin. Visual interactions are therefore possible at the depths and times when these organisms overlap in the water column indicating that vision may play a far greater role at depth in deep freshwater lakes than had been previously documented.

  15. Educação do Campo e o programa Projovem Campo em Planaltina/DF

    Directory of Open Access Journals (Sweden)

    Marina Morenna Alves Figueiredo

    2017-07-01

    Full Text Available A Política Nacional de Juventude (PNJ demonstra o reconhecimento do Governo sobre a necessidade de políticas sociais específicas para este segmento. Dentre as diversas políticas para a juventude, a presente pesquisa buscou retratar o Programa Projovem Campo, na área de educação, destinado a promover a conclusão do ensino fundamental dos jovens, de 18 a 29 anos, que já deveriam ter concluído tal etapa. Para elucidar a importância desta política pública foi realizado um estudo de caso no Centro de Ensino Fundamental Pipiripau II, na zona rural de Planaltina/DF e foram feitas entrevistas com os gestores, coordenadores, professores e estudantes do Programa Projovem Campo nesta unidade de ensino. Os resultados do trabalho de campo indicaram dificuldades na implementação e execução do programa. Entre as principais dificuldades destacam-se o não cumprimento de ações estabelecidas no desenho da política, como a refeição oferecida que não era jantar, as rotas dos ônibus e o impedimento de transportar crianças, a falta de um espaço específico e de materiais para a sala de acolhimento, além do não pagamento da bolsa auxílio para os estudantes.

  16. Arctic deep-water ferromanganese-oxide deposits reflect the unique characteristics of the Arctic Ocean

    Science.gov (United States)

    Hein, James; Konstantinova, Natalia; Mikesell, Mariah; Mizell, Kira; Fitzsimmons, Jessica N.; Lam, Phoebe; Jensen, Laramie T.; Xiang, Yang; Gartman, Amy; Cherkashov, Georgy; Hutchinson, Deborah; Till, Claire P.

    2017-01-01

    Little is known about marine mineral deposits in the Arctic Ocean, an ocean dominated by continental shelf and basins semi-closed to deep-water circulation. Here, we present data for ferromanganese crusts and nodules collected from the Amerasia Arctic Ocean in 2008, 2009, and 2012 (HLY0805, HLY0905, HLY1202). We determined mineral and chemical compositions of the crusts and nodules and the onset of their formation. Water column samples from the GEOTRACES program were analyzed for dissolved and particulate scandium concentrations, an element uniquely enriched in these deposits.The Arctic crusts and nodules are characterized by unique mineral and chemical compositions with atypically high growth rates, detrital contents, Fe/Mn ratios, and low Si/Al ratios, compared to deposits found elsewhere. High detritus reflects erosion of submarine outcrops and North America and Siberia cratons, transport by rivers and glaciers to the sea, and distribution by sea ice, brines, and currents. Uniquely high Fe/Mn ratios are attributed to expansive continental shelves, where diagenetic cycling releases Fe to bottom waters, and density flows transport shelf bottom water to the open Arctic Ocean. Low Mn contents reflect the lack of a mid-water oxygen minimum zone that would act as a reservoir for dissolved Mn. The potential host phases and sources for elements with uniquely high contents are discussed with an emphasis on scandium. Scandium sorption onto Fe oxyhydroxides and Sc-rich detritus account for atypically high scandium contents. The opening of Fram Strait in the Miocene and ventilation of the deep basins initiated Fe-Mn crust growth ∼15 Myr ago.

  17. 75 FR 36773 - Pipeline Safety: Updating Facility Response Plans in Light of the Deepwater Horizon Oil Spill

    Science.gov (United States)

    2010-06-28

    ... have been, or are subsequently relocated to the Gulf to respond to the Deepwater Horizon event should.... PHMSA-2010-0175] Pipeline Safety: Updating Facility Response Plans in Light of the Deepwater Horizon Oil... 194. In light of the Deepwater Horizon oil spill in the Gulf of Mexico, which has resulted in the...

  18. 33 CFR 149.321 - How many ring life buoys must be on each deepwater port?

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false How many ring life buoys must be on each deepwater port? 149.321 Section 149.321 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Lifesaving Equipment Manned Deepwater Port Requirements § 149.321 How many ring life buoys must be...

  19. 75 FR 29397 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling

    Science.gov (United States)

    2010-05-26

    ... National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling By the authority vested in... Deepwater Horizon Oil Spill and Offshore Drilling (the ``Commission''). Sec. 2. Membership. (a) The... impact of, oil spills associated with offshore drilling, taking into consideration the environmental...

  20. 75 FR 70350 - Liberty Natural Gas LLC, Liberty Liquefied Natural Gas (LNG) Deepwater Port License Application

    Science.gov (United States)

    2010-11-17

    ... DEPARTMENT OF TRANSPORTATION Maritime Administration [USCG-2010-0993] Liberty Natural Gas LLC, Liberty Liquefied Natural Gas (LNG) Deepwater Port License Application AGENCY: Maritime Administration... announce they have received an application for the licensing of a natural gas deepwater port and the...

  1. 76 FR 4417 - Liberty Natural Gas LLC, Liberty Liquefied Natural Gas (LNG) Deepwater Port License Application

    Science.gov (United States)

    2011-01-25

    ... DEPARTMENT OF TRANSPORTATION Maritime Administration [USCG-2010-0993] Liberty Natural Gas LLC, Liberty Liquefied Natural Gas (LNG) Deepwater Port License Application AGENCY: Maritime Administration... application describes an offshore natural gas deepwater port facility that would be located approximately 16.2...

  2. JAIME CAMPOS GARRIDO (1939-2010

    Directory of Open Access Journals (Sweden)

    Efraím Otero Ruiz

    2011-01-01

    Full Text Available

    Palabras pronunciadas durante las honras fúnebres, Iglesia Inmaculada Concepción del Chicó, Diciembre 21, 2010

    Con el desgarramiento de las calamidades imprevistas y ahogados por la sorpresa y el dolor reprimido, nos agrupamos aquí hoy para decir unas palabras de despedida al inolvidable amigo y colega Jaime Campos Garrido. Porque quienes lo vieron a su regreso de Europa, hacía apenas un mes, jamás se imaginaron que la muerte iría a incluirlo en ese terrible listado que en el último semestre se ha llevado a lo mejor de la gastroenterología clínica y quirúrgica colombianas, en un desfi le interminable de duelos sucesivos: Alvaro Caro Mendoza, Jaime De la Hoz De la Hoz y ahora Jaime, todos después de coronar las más brillantes carreras que la especialidad y la Universidad  Nacional avalaron en la última mitad del siglo XX, y todos cercados de ese nimbo de prestigio y amistad que hoy nos hace más insoportable y dolorosa su partida. 

    Nacido de cuna preclara en Popayán, Jaime terminó sus estudios de médico en la Universidad Nacional en 1964 y desde sus épocas de estudiante mostró la inclinación por la que iría a ser su especialidad definitiva. Muy recién graduado viajó a Francia, donde iría a especializarse por varios años en endoscopia digestiva; allí fue pronto acogido por sus colegas que en etapas sucesivas lo irían incorporando a la Sociedad Nacional Francesa de dicha especialidad, lo mismo que a la Francesa de Gastroenterología y al Círculo André Lambling, del que sería Fundador en 1981 y poco después su Presidente, distinción extraordinaria para un joven especialista proveniente de estas latitudes. A su regreso a Bogotá además como destacado internista, fue fundador en 1967 de la cátedra de Gastroenterología en el Hospital de San Juan de Dios, siguiendo de ahí en adelante por riguroso concurso a ocupar los cargos de Instructor Asociado

  3. Sociedade e cultura portuguesas II : a cidade e o campo

    OpenAIRE

    Catroga, Fernando; Carvalho, Paulo Archer de

    2000-01-01

    Académico - Licenciaturas A cidade e o campo, um jogo dicotómico evidenciando características que por um lado eram associadas à pax rústica, santuário de virtudes cristãs, e por outro lado aos conflitos e desventuras urbanas. O campo tipifica um segmento mágico de um passado que o crescimento urbano ameaça destruir.

  4. Deepwater offshore windfarm. Design fabrication and installation study. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This report discusses the plans and benefits of using the Beatrice oil field installation for the development of the offshore Beatrice windfarm in the Moray Firth. The development of an economic support structure for wind turbine generators to allow development of deepwater wind farms was investigated, and the screening of structural designs, and the analysis of fatigue, fabrication and installation considerations is described. Details are given of the recommendation for a further examination of two structural designs as options for the Beatrice windfarm development, the estimated costs, and the results of an environmental review.

  5. Deep-water anoxygenic photosythesis in a ferruginous chemocline

    DEFF Research Database (Denmark)

    Crowe, Sean; Maresca, J. A.; Jones, CarriAyne

    2014-01-01

    information suggests that deep-water GSB can be supported by a S-cycle, even under ferruginous conditions. The constraints we place on the metabolic capacity and physiology of GSB have important geobiological implications. Biomarkers diagnostic of GSB would be a good proxy for anoxic conditions but could...... not discriminate between euxinic and ferruginous states, and though GSB biomarkers could indicate a substantial GSB community, such a community may exist with very little metabolic activity. The light requirements of GSB indicate that at light levels comparable to those in the OAB of Lake Matano or the Black Sea...

  6. Levantamento de Orchidaceae em quatro fragmentos de Campos de Altitude em Campos do Jordão, SP, Brasil

    OpenAIRE

    Gonçalves,Gabriel Franco; Sampaio,Daniela; Barros,Fábio de

    2015-01-01

    Orchidaceae é uma das maiores famílias das Angiospermas, sendo também uma das mais ricas e com mais alto grau de endemismo na Mata Atlântica, bioma que inclui a Floresta Ombrófila Mista e os Campos de Altitude, típicos da região de Campos do Jordão. Este trabalho teve como objetivo fazer um levantamento das espécies de Orchidaceae ocorrentes em quatro campos de altitude em uma Área de Proteção Ambiental pertencente ao Instituto Presbiteriano Mackenzie em Campos do Jordão, Estado de São Paulo,...

  7. El ordenamiento de Medina del Campo de 1328 = The Medina del Campo Legal Code of 1328

    Directory of Open Access Journals (Sweden)

    Ana Arranz Guzmán

    2015-06-01

    Full Text Available Durante los dos últimos siglos la controversia historiográfica ha envuelto en una cierta nebulosa la reunión mantenida por Alfonso XI en Medina del Campo en el año 1328, siendo calificada por algunos historiadores de auténticas Cortes o negando, otros, su propia existencia. Con la transcripción en estas páginas del Ordenamiento elaborado en ella, así como con el análisis realizado del texto y su cotejo con las actas editadas de las Cortes madrileñas de 1329, se espera cerrar, quizá definitivamente, la larga polémica suscitada por esta asamblea, a la vez que aportar algunos datos más sobre la sobresaliente labor legislativa llevada a cabo por el monarca castellano.Scholarship over the last two centuries has debated once and again without reaching a consensus over the meeting held by Alfonso XI in Medina del Campo in 1328, considered by some historians as an authentic parliament (Cortes while others deny it. With the transcription of this legal code (Ordenamiento and its comparison with the edited account of the proceedings of the Cortes held in Madrid in 1329, our purpose is to lay to rest the debate provoked by this assembly. Furthermore, we intend to present additional information relating to the salient legislative work undertaken by this Castilian monarch.

  8. 76 FR 6153 - Supplemental Environmental Impact Statement for the Proposed Campo Regional Landfill Project on...

    Science.gov (United States)

    2011-02-03

    ... for the Proposed Campo Regional Landfill Project on the Campo Indian Reservation, San Diego County, CA... proposed Campo Regional Landfill Project (Proposed Action) to be located on the Campo Indian Reservation... Landfill Project (Proposed Action). There is no Federal action of amended lease and amended sublease...

  9. Qualification of a novel deepwater gas / liquid separator

    Energy Technology Data Exchange (ETDEWEB)

    Abrand, Stephanie

    2010-07-01

    The implementation of subsea boosting and processing systems is becoming a common development scheme for the development of deep and ultra-deep water fields. Those subsea processing systems shall address the mechanical and functional constraints that are imposed by the deepwater installation and operation along with the obvious reliability requirements. Saipem has developed a deepwater gas separation and liquid boosting system that encompasses a good flexibility in handling a wide range of steady and unsteady multiphase input streams and a relatively simple mechanical arrangement. The system is composed of an array of vertical pipes that contributes in providing the required separation and liquid hold up volumes. The reduced diameter and wall thickness of the vertical pipes, as compared with the equivalent single separation vessel, is particularly suited in deep and ultra-deep water applications and/or high pressure services. Furthermore, the system relies on the gravity separation whose efficiency is ensured by its ability to accommodate large variety of input flowrate and un-steady regimes. In the continuous effort of providing reliable and proven process solutions to the market, Saipem has undertaken a qualification program focused to characterise and demonstrate the system versatility and separation performances, that will involve model testing in multiphase conditions. (Author)

  10. Minimal incorporation of Deepwater Horizon oil by estuarine filter feeders

    International Nuclear Information System (INIS)

    Fry, Brian; Anderson, Laurie C.

    2014-01-01

    Highlights: • Oil from the Deepwater Horizon oil spill entered Louisiana bays in mid-2010. • Oil was used minimally (<1%) in diets of mussels and barnacles. • Also, oil did not enhance planktonic respiration rates. • Use of oil carbon was relatively small in these productive estuarine food webs. - Abstract: Natural abundance carbon isotope analyses are sensitive tracers for fates and use of oil in aquatic environments. Use of oil carbon in estuarine food webs should lead to isotope values approaching those of oil itself, −27‰ for stable carbon isotopes reflecting oil origins and −1000‰ for carbon-14 reflecting oil age. To test for transfer of oil from the 2010 Deepwater Horizon spill into estuarine food webs, filter-feeding barnacles (Balanus sp.) and marsh mussels (Geukensia demissa) were collected from Louisiana estuaries near the site of the oil spill. Carbon-14 analyses of these animals from open waters and oiled marshes showed that oil use was <1% and near detection limits estimated at 0.3% oil incorporation. Respiration studies showed no evidence for enhanced microbial activity in bay waters. Results are consistent with low dietary impacts of oil for filter feeders and little overall impact on respiration in the productive Louisiana estuarine systems

  11. Development and verification of deep-water blowout models

    International Nuclear Information System (INIS)

    Johansen, Oistein

    2003-01-01

    Modeling of deep-water releases of gas and oil involves conventional plume theory in combination with thermodynamics and mass transfer calculations. The discharges can be understood in terms of multiphase plumes, where gas bubbles and oil droplets may separate from the water phase of the plume and rise to the surface independently. The gas may dissolve in the ambient water and/or form gas hydrates--a solid state of water resembling ice. All these processes will tend to deprive the plume as such of buoyancy, and in stratified water the plume rise will soon terminate. Slick formation will be governed by the surfacing of individual oil droplets in a depth and time variable current. This situation differs from the conditions observed during oil-and-gas blowouts in shallow and moderate water depths. In such cases, the bubble plume has been observed to rise to the surface and form a strong radial flow that contributes to a rapid spreading of the surfacing oil. The theories and behaviors involved in deepwater blowout cases are reviewed and compared to those for the shallow water blowout cases

  12. O voleibol feminino e seu posicionamento no campo esportivo brasileiro

    Directory of Open Access Journals (Sweden)

    Tatiana Moreira

    2013-11-01

    Full Text Available http://dx.doi.org/10.5007/2175-8042.2013v25n41p269 O presente artigo oferece reflexões introdutórias acerca do posicionamento do voleibol feminino no interior do campo esportivo brasileiro. Por meio da pesquisa exploratória com base em Pinheiro (1995, Pizzolato (2004, Marchi Jr. (2004, Costa (2005, Vlastuin (2008, Moreira (2009 e Afonso (2011, identificamos pontos centrais que orientaram a interpretação sociológica fundamentada pela Sociologia Reflexiva de Bourdieu. Constatamos que a trajetória histórica do voleibol feminino no campo esportivo brasileiro se deu entre habitus construídos e legitimados sob efeitos de dominação simbólica do voleibol masculino, instauradores das leis de reprodução social e que refletem o seu posicionamento hierárquico no campo esportivo brasileiro.

  13. Chronobiology of deep-water decapod crustaceans on continental margins.

    Science.gov (United States)

    Aguzzi, Jacopo; Company, Joan B

    2010-01-01

    Species have evolved biological rhythms in behaviour and physiology with a 24-h periodicity in order to increase their fitness, anticipating the onset of unfavourable habitat conditions. In marine organisms inhabiting deep-water continental margins (i.e. the submerged outer edges of continents), day-night activity rhythms are often referred to in three ways: vertical water column migrations (i.e. pelagic), horizontal displacements within benthic boundary layer of the continental margin, along bathymetric gradients (i.e. nektobenthic), and endobenthic movements (i.e. rhythmic emergence from the substrate). Many studies have been conducted on crustacean decapods that migrate vertically in the water column, but much less information is available for other endobenthic and nektobenthic species. Also, the types of displacement and major life habits of most marine species are still largely unknown, especially in deep-water continental margins, where steep clines in habitat factors (i.e. light intensity and its spectral quality, sediment characteristics, and hydrography) take place. This is the result of technical difficulties in performing temporally scheduled sampling and laboratory testing on living specimens. According to this scenario, there are several major issues that still need extensive research in deep-water crustacean decapods. First, the regulation of their behaviour and physiology by a biological clock is almost unknown compared to data for coastal species that are easily accessible to direct observation and sampling. Second, biological rhythms may change at different life stages (i.e. size-related variations) or at different moments of the reproductive cycle (e.g. at egg-bearing) based on different intra- and interspecific interactions. Third, there is still a major lack of knowledge on the links that exist among the observed bathymetric distributions of species and selected autoecological traits that are controlled by their biological clock, such as the

  14. Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs

    Energy Technology Data Exchange (ETDEWEB)

    Michael Batzle

    2006-04-30

    During this last period of the ''Seismic Evaluation of Hydrocarbon Saturation in Deep-Water Reservoirs'' project (Grant/Cooperative Agreement DE-FC26-02NT15342), we finalized integration of rock physics, well log analysis, seismic processing, and forward modeling techniques. Most of the last quarter was spent combining the results from the principal investigators and come to some final conclusions about the project. Also much of the effort was directed towards technology transfer through the Direct Hydrocarbon Indicators mini-symposium at UH and through publications. As a result we have: (1) Tested a new method to directly invert reservoir properties, water saturation, Sw, and porosity from seismic AVO attributes; (2) Constrained the seismic response based on fluid and rock property correlations; (3) Reprocessed seismic data from Ursa field; (4) Compared thin layer property distributions and averaging on AVO response; (5) Related pressures and sorting effects on porosity and their influence on DHI's; (6) Examined and compared gas saturation effects for deep and shallow reservoirs; (7) Performed forward modeling using geobodies from deepwater outcrops; (8) Documented velocities for deepwater sediments; (9) Continued incorporating outcrop descriptive models in seismic forward models; (10) Held an open DHI symposium to present the final results of the project; (11) Relations between Sw, porosity, and AVO attributes; (12) Models of Complex, Layered Reservoirs; and (14) Technology transfer Several factors can contribute to limit our ability to extract accurate hydrocarbon saturations in deep water environments. Rock and fluid properties are one factor, since, for example, hydrocarbon properties will be considerably different with great depths (high pressure) when compared to shallow properties. Significant over pressure, on the other hand will make the rocks behave as if they were shallower. In addition to the physical properties, the scale and

  15. Spatial distribution of pelagic fish larvae in the northern main basin of Lake Huron

    Science.gov (United States)

    Roseman, Edward F.; O'Brien, Timothy P.

    2013-01-01

    Larval fish occurrence in inshore and offshore zones in the northern main basin of Lake Huron was assessed during 2007 as part of a larger ecological examination of Lake Huron foodwebs and habitats. Day and night collections using neuston and conical nets at inshore (1.5–15 m depths) and offshore (37 and 91 m depths) locations at De Tour and Hammond Bay to assess the abundance, phenology, and spatial distribution of pelagic ichthyoplankton during spring and early summer were made. In general, densities of larval fishes were higher at De Tour than Hammond Bay during daytime neuston net collections, with the exception of Longnose Sucker, which were only collected at Hammond Bay. Lake Whitefish, Burbot, and Rainbow Smelt dominated inshore catches in early spring with Cisco, Deepwater Sculpin, Emerald Shiner, Bloater, Slimy Sculpin, Ninespine Stickleback, and Yellow Perch larvae also collected.Nighttime nearshore and offshore sampling revealed that Rainbow Smelt and Burbot larvae were present in relatively high abundances compared to inshore densities. Concentrations of larvae of deepwater demersal fishes such as Lake Whitefish and Deepwater Sculpin suggest that inshore zones in northern Lake Huron are important nursery habitats emphasizing a critical production and recruitment linkage between inshore and deepwater zones.

  16. Deepwater Canyons 2012: Pathways to the Abyss on NOAA Ship Nancy Foster between 20120815 and 20121001

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Mid-Atlantic Deep-Water Canyons project is co-funded by the Bureau of Ocean Energy Management (BOEM) and NOAA's Office of Ocean Exploration and Research (which...

  17. Deep-water fisheries at the Atlantic Frontier

    Science.gov (United States)

    Gordon, J. D. M.

    2001-05-01

    The deep sea is often thought of as a cold, dark and uniform environment with a low-fish biomass, much of which is highly adapted for life in a food-poor environment. While this might be true of the pelagic fish living in the water column, it is certainly not true of the demersal fish which live on or close to the bottom on the continental slopes around the British Isles (the Atlantic Frontier). These fish are currently being commercially exploited. There is growing evidence to support the view that success of the demersal fish assemblages depends on the pelagic or benthopelagic food sources that impinge both vertically and horizontally onto the slope. There are several quite separate and distinct deep-water fisheries on the Atlantic Frontier. It is a physical barrier, the Wyville-Thomson Ridge, which results in the most significant division of the fisheries. The Ridge, which has a minimum depth of about 500 m, separates the warmer deep Atlantic waters from the much colder Norwegian Sea water and as a result, the deep-water fisheries to the west of the Hebrides and around the offshore banks are quite different from those of the Faroe-Shetland Channel (West of Shetland). The fisheries to the West of the Hebrides can be further divided by the fishing method used into bottom trawl, semipelagic trawl and longline. The bottom-trawl fisheries extend from the shelf-slope break down to about 1700 m and the target species varies with depth. The smallest vessels in the fleet fish on the upper slope, where an important target species is the anglerfish or monkfish ( Lophius spp.). On the mid-slope the main target species are blue ling ( Molva dypterygia) and roundnose grenadier ( Coryphaenoides rupestris), with bycatches of black scabbardfish ( Aphanopus carbo) and deep-water sharks. On the lower slope orange roughy ( Hoplostethus atlanticus) is an important target species. The major semipelagic trawl fishery is a seasonal fishery on spawning aggregations of blue whiting

  18. Morphological divergence between three Arctic charr morphs - the significance of the deep-water environment.

    Science.gov (United States)

    Skoglund, Sigrid; Siwertsson, Anna; Amundsen, Per-Arne; Knudsen, Rune

    2015-08-01

    Morphological divergence was evident among three sympatric morphs of Arctic charr (Salvelinus alpinus (L.)) that are ecologically diverged along the shallow-, deep-water resource axis in a subarctic postglacial lake (Norway). The two deep-water (profundal) spawning morphs, a benthivore (PB-morph) and a piscivore (PP-morph), have evolved under identical abiotic conditions with constant low light and temperature levels in their deep-water habitat, and were morphologically most similar. However, they differed in important head traits (e.g., eye and mouth size) related to their different diet specializations. The small-sized PB-morph had a paedomorphic appearance with a blunt head shape, large eyes, and a deep body shape adapted to their profundal lifestyle feeding on submerged benthos from soft, deep-water sediments. The PP-morph had a robust head, large mouth with numerous teeth, and an elongated body shape strongly related to their piscivorous behavior. The littoral spawning omnivore morph (LO-morph) predominantly utilizes the shallow benthic-pelagic habitat and food resources. Compared to the deep-water morphs, the LO-morph had smaller head relative to body size. The LO-morph exhibited traits typical for both shallow-water benthic feeding (e.g., large body depths and small eyes) and planktivorous feeding in the pelagic habitat (e.g., streamlined body shape and small mouth). The development of morphological differences within the same deep-water habitat for the PB- and PP-morphs highlights the potential of biotic factors and ecological interactions to promote further divergence in the evolution of polymorphism in a tentative incipient speciation process. The diversity of deep-water charr in this study represents a novelty in the Arctic charr polymorphism as a truly deep-water piscivore morph has to our knowledge not been described elsewhere.

  19. Crisis strategies in BP's Deepwater Horizon response : An image repair and situational crisis communication study

    OpenAIRE

    Johansson, Mikael

    2017-01-01

    The BP Deepwater Horizon crisis in 2010 was one the largest catastrophes in the history of the oil industry. BP was sued over the disaster, and lost several billion dollars. This study examines the crisis response strategies and/or image repair strategies, which can be found in BP's press releases following the Deepwater Horizon crisis. In particular, the study looks closer at what established crisis communication strategies could be discerned in the material, and how they are used discursive...

  20. Catwell and Sherdaps for deep-water production fields

    Energy Technology Data Exchange (ETDEWEB)

    Hopper, H.P.; Rey, R. [Cameron, 34 - Beziers (France)

    2000-07-01

    The names Catwell and SherDaps are derived from: - Catenary Well - Subsea Horizontal Extended Reach Drilling And Production System. Both systems use the technique of being able to drill a well in deep-water either through a platform catenary carrier pipe or a catenary drilling riser. They also offer, in addition, significant advantages when drilling into shallow reservoirs and the ability to enhance production using platform artificial lift systems or easily serviceable pumps either in the well or at the mud-line. Catwell is a platform system with surface wellheads/trees whereas SherDaps uses a group of subsea wellheads/trees/BOP's that are accessible from one permanent catenary drilling riser. Both systems allow drilling/completing and future well intervention from a central location that otherwise would have required several drilling centres (i.e. platforms or subsea) if the conventional approach was followed. It is envisaged that well targets close to a platform will use well conductors possibly with mud-line wellheads, then Catwell to reach the medium range well targets and SherDaps for long range wells. It is considered that this arrangement would allow a single surface drilling/ production centre to have access to well targets giving a foot print range of up to a 20 km diameter. The total Capex savings on a Deep-water Field Development could be in the region of $200 m on a $1 billion development. Opex will be lower with the ability from the drilling center to quickly access any problem well and rectify any faults, minimising lost production. (authors)

  1. TRABALHO DE CAMPO NO VALE DO JEQUITINHONHA: UMA POSSIBILIDADE DE APROXIMAÇÃO DA REALIDADE DO CAMPO

    Directory of Open Access Journals (Sweden)

    Maria de Fátima Almeida Martins

    2010-01-01

    Full Text Available Este texto é fruto da experiência que tivemos na visita de campo ao Vale do Jequitinhonha(MG, lugar de referência e atuação de três educandos do curso de Licenciatura do Campo – Pedagogia da Terra –, integrantes da turma iniciada em dezembro de 2005, na Faculdade de Educação da UFMG. Essa turma marcou o início de nossas reflexões e nossa prática,com a formação e o ensino da Área de Ciências Sociais e Humanidades para professores que atuarão na educação do/no campo. Os relatos, as análises e as aproximações com os saberes e fazeres do campo apresentados aqui resultam das observações e do acompanhamento realizados nos locais de estágio dos referidos educandos. Estes residem 16TRABALHO DE CAMPO NO VALE DO JEQUITINHONHA: Revista Geografares, n° 8, 2010UMA POSSIBILIDADE DE APROXIMAÇÃO DA REALIDADE DO CAMPOnas cidades de Rio Pardo de Minas, Jequitinhonha e Almenara, mas suas práticas se realizam no campo, relacionada, respectivamente, à atuação do Sindicato dos Trabalhadores Rurais de Rio Pardo de Minas; do Centro de Agricultura Alternativa (CAA; da Caritas Diocesana, sediada em Jequitinhonha; e do Movimento dos Trabalhadores Rurais Sem Terra (MST, em Jequitinhonha e Almenara.

  2. SEA-MAP: A cost effective method for production from deepwater reservoirs

    International Nuclear Information System (INIS)

    Wybro, P.G.; Chaisson, M.

    1994-01-01

    SEA Engineering Marginal field Autonomous Production (SEAMAP) based on a small tension leg platform is a concept for commercially viable production from deepwater reservoirs. Considerable engineering effort has and is still being made to find ways of commercially developing the deepwater Gulf of Mexico reserves. The limited number of actual deepwater developments would appear to indicate the energy industry at present remains reluctant to proceed with the development of many of the known discoveries. The major deterrents have been the major investment required in order to implement the development plans combined with uncertainties regarding reservoir performance. Mindful of this situation, SEA-MAP evolved from a perceived need for a low cost deepwater production system viable for relatively small reserves. The capital risk exposure is more sustainable and the major part of the facilities can be relocated to another site. Conversely, field production can be increased at a later stage with additional SEA-MAP platforms SEA-MAP offers a potential means, with minimum capital expenditure, of initiating production autonomously from a deepwater field, obtaining reservoir data and thereafter producing and performing workover activities during the field life. After producing from the field for a period, it may be determined that additional wells are needed. Such a situation leads into a logical phased development comprising more than one small platform or the relocation of an existing structure. Deepwater development can thus be approached cautiously, with minimized capital risk, minimal start-up investment and subsequent self-financing phased production

  3. Imagen de retina de campo ultra-amplio

    Directory of Open Access Journals (Sweden)

    Gerardo García-Aguirre

    2017-11-01

    Conclusión: Las imágenes de campo ultra-amplio han revolucionado la forma en la que estudiamos y entendemos la enfermedad de la retina. A medida que la tecnología para obtenerlas se haga más accesible, formará parte del armamentario de rutina para estudiar las enfermedades de la retina.

  4. Divagaciones: la ciudad, el campo, la comunicación

    Directory of Open Access Journals (Sweden)

    Gustavo M. Quesada

    2015-01-01

    Full Text Available Espero plantear algunos puntos para un debate de tiroteo entre el alcalde y un pequeño propietario la comunicación rural en una perspectiva de rural. Me pregunto, ¿es esto desarrollo? integración campo-ciudad. En estos puntos se En la integración campo-ciudad es necesario anotarán las diferencias del campo y de la ciudad. Su comprender que, en la mayoría de los casos, el explicación requerirá elaboraciones teóricas y campo lleva todas las probabilidades de perder. La metodológicas particulares. Al hablar de tecnología de producción, las determinaciones sobre comunicación rural, hay que considerar que la política agrícola y las operaciones de descripción de sus problemas alude a otros campos comercialización se realizan en la ciudad bajo su del conocimiento que podrían tratarse ampliamente influjo. Cubriré este debate bajo el prisma de como comunicación de las minorías o comunicación educador / comunidad rural. popular. Quizá así se pueda aspirar a un desarrollo pesar de que el área que abarca la que sirva para evitar nuevos suicidios o tiroteos enseñanza de la comunicación ha sido causados por errores tecnológicos. y a propósito de últimamen te una de las más, fértiles, citaré suicidios y tiroteos allá van dos hechos que mucho aquí como punto de referencia solamente me impresionaron.

  5. Energetic aspects and opportunities for reusing water on offshore platforms in Campos Basin, Brazil

    OpenAIRE

    Duarte, Victor Magalhães; Queiroz, Luciano Matos; Torres, Ednildo Andrade; Kiperstok, Asher

    2017-01-01

    Abstract In the drilling and production of oil at sea, a large quantity of potable water used is most commonly transported to oil platforms using offshore supply vessels (OSVs). Sea water desalination is used as well, but only in a few oil platforms. To minimize energy consumption, water supply options were studied. The desalination of seawater and the reusing of streams of grey water and black water were evaluated and compared with the characteristics of the current supply via OSVs. In both ...

  6. Ergonomics, safety, and resilience in the helicopter offshore transportation system of Campos Basin.

    Science.gov (United States)

    Gomes, José Orlando; Huber, Gilbert J; Borges, Marcos R S; de Carvalho, Paulo Victor R

    2015-01-01

    Air transportation of personnel to offshore oil platforms is one of the major hazards of this kind of endeavor. Pilot performance is a key factor in the safety of the transportation system. This study seeks to identify the ergonomic factors present in pilots' activities that may in some way compromise or enhance their performance, the constraints and affordances which they are subject to; and where possible to link these to their associated risk factors. Methodology adopted in this project studies work in its context. It is a merging of Activity Analysis (Guerin et al. 2001) of European tradition with Cognitive Task Analysis (CTA - www.ctaresource.com) articulated with the recent approaches to cognitive systems engineering developed by Professors David Woods and Erik Hollnagel. Fifty-five hours of field interviews provided the input for analysis. Sixteen ergonomic constraints were identified, some cognitive, some physical, all considered relevant by the research subjects and expert advisers. Although the safety record of the personnel transportation system studied is considered acceptable, there is low hanging fruit to be picked which can help improve the system's safety.

  7. Development of a segmentation method for analysis of Campos basin typical reservoir rocks

    Energy Technology Data Exchange (ETDEWEB)

    Rego, Eneida Arendt; Bueno, Andre Duarte [Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Macae, RJ (Brazil). Lab. de Engenharia e Exploracao de Petroleo (LENEP)]. E-mails: eneida@lenep.uenf.br; bueno@lenep.uenf.br

    2008-07-01

    This paper represents a master thesis proposal in Exploration and Reservoir Engineering that have the objective to development a specific segmentation method for digital images of reservoir rocks, which produce better results than the global methods available in the bibliography for the determination of rocks physical properties as porosity and permeability. (author)

  8. Natural gas geological characteristics and great discovery of large gas fields in deep-water area of the western South China Sea

    Directory of Open Access Journals (Sweden)

    Zhenfeng Wang

    2015-12-01

    Full Text Available To accelerate the petroleum exploration in deep sea of China, since the period of “the 11th Five-Year Plan”, the sedimentary process, source rock formation and hydrocarbon generation and expulsion process in deep-water area of the Qiongdongnan Basin in the western South China Sea have been studied systematically using the data like large-area 3D seismic survey, logging, drill core (cuttings and geochemical analysis, providing three innovative understandings, i.e. excellent hydrocarbon source conditions, good accumulation conditions, and grouping and zonal distribution of large exploration targets. From the study, the following conclusions are drawn. First, the deep-water area located in the southern and central parts of the Qiongdongnan Basin was formed under the control of such tectonic events as Indosinian–Eurasian Plate collision, Himalayan uplifting and South China Sea expansion, and experienced Paleogene lift and Neogene depression stages. Second, accompanied by lacustrine deposition, faulting activity was violent in Eocene; whereas in Early Oligocene, rift continued to develop under a sedimentary environment of marine–terrestrial transitional facies and littoral-neritic facies. Third, oil generation predominated Eocene lacustrine mudstone and gas generation predominated Lower Oligocene marine–terrestrial transitional facies coal-measure strata compose two sets of major source rocks. Fourth, analysis in respect of thermal evolution level, hydrocarbon generation volume and hydrocarbon generation intensity shows that Ledong, Lingshui, Baodao and Changchang sags belong to potential hydrocarbon-rich kitchens, among which Ledong and Lingshui sags have been proved to have great hydrocarbon generation potential by drilling. Fifth, researches of deep-water sedimentology and hydrocarbon accumulation dynamics reveal that Paleogene and Neogene plays are developed vertically, and favorable hydrocarbon accumulation zones like the Central

  9. Astronomically paced changes in deep-water circulation in the western North Atlantic during the middle Eocene

    Science.gov (United States)

    Vahlenkamp, Maximilian; Niezgodzki, Igor; De Vleeschouwer, David; Bickert, Torsten; Harper, Dustin; Kirtland Turner, Sandra; Lohmann, Gerrit; Sexton, Philip; Zachos, James; Pälike, Heiko

    2018-02-01

    North Atlantic Deep Water (NADW) currently redistributes heat and salt between Earth's ocean basins, and plays a vital role in the ocean-atmosphere CO2 exchange. Despite its crucial role in today's climate system, vigorous debate remains as to when deep-water formation in the North Atlantic started. Here, we present datasets from carbonate-rich middle Eocene sediments from the Newfoundland Ridge, revealing a unique archive of paleoceanographic change from the progressively cooling climate of the middle Eocene. Well-defined lithologic alternations between calcareous ooze and clay-rich intervals occur at the ∼41-kyr beat of axial obliquity. Hence, we identify obliquity as the driver of middle Eocene (43.5-46 Ma) Northern Component Water (NCW, the predecessor of modern NADW) variability. High-resolution benthic foraminiferal δ18O and δ13C suggest that obliquity minima correspond to cold, nutrient-depleted, western North Atlantic deep waters. We thus link stronger NCW formation with obliquity minima. In contrast, during obliquity maxima, Deep Western Boundary Currents were weaker and warmer, while abyssal nutrients were more abundant. These aspects reflect a more sluggish NCW formation. This obliquity-paced paleoceanographic regime is in excellent agreement with results from an Earth system model, in which obliquity minima configurations enhance NCW formation.

  10. Composition, phenology and restoration of campo rupestre mountain grasslands - Brazil

    OpenAIRE

    Le Stradic, Soizig

    2012-01-01

    Global environmental changes, especially land-use changes, have profound effects on both ecosystem functioning and biodiversity, having already altered many ecosystem services. These losses emphasize the need to preserve what remains; however when conservation programs are not sufficient, restoring areas that have been destroyed or disturbed can improve conservation efforts and mitigate damages. This work focuses on campos rupestres, Neotropical grasslands found at altitudes, which are part o...

  11. O mato & o asfalto: Campos da Antropologia no Brasil

    Directory of Open Access Journals (Sweden)

    Mariza Corrêa

    2011-06-01

    Full Text Available O artigo é um breve apanhado sobre o campo da antropologia no Brasil. Feito originalmente para leitores estrangeiros, pareceu-me melhor deixá-lo como estava a atualizá-lo, na expectativa de que possa ser útil para jovens iniciantes nesse campo, já que o texto refere algumas instituições importantes para a sua formação nos últimos anos — como os programas de pós-graduação e a Associação Brasileira de Antropologia (ABA, e seus temas de pesquisa. Propõe-se aqui também que não apenas a interdisciplinaridade, bastante praticada hoje, mas também relações transversais ao próprio campo da antropologia são desejáveis — isto é, que os antropólogos “urbanos” levem em conta o que dizem os etnólogos, que estes dialoguem com os estudos de gênero etc. De todo modo, a bibliografia incluída ainda é, e continuará a sê-lo por um bom tempo, leitura necessária para pesquisadores que se interessem pela história da antropologia.

  12. Macrorrealismo fenomenológico e campos-experiência

    Directory of Open Access Journals (Sweden)

    Renato Schaeffer

    1995-01-01

    Full Text Available Este artigo critica a concepção predominante, representacionista-neurofisicalista sobre a percepção sensorial. Introduz a noção de "campo-experiência" na tentativa de tratamento ontológico dos dados fenomenológicos da experiência. A idéia geral é que a experiência visual, por exemplo, seria ontologicamente algo assim como um campo-experiência de intencionalidade visual, que se estende por sobre e entre o sistema nervoso central do sujeito da experiência e o objeto distai da visão. Chamo esta posição de macrorrealismo fenomenológico, em contraste com o microrrealismo científico. Qualidades da fenomenalidade não estão subjetivamente dentro do cérebro, mas objetivamente dentro de campos-experiência perceptuais extra-encefálicos, ou, como dizemos, lá fora no mundo. Algumas conseqüências específicas do macrorrealismo fenomenológico são apresentadas.

  13. Helping enhances productivity in campo flicker ( Colaptes campestris) cooperative groups

    Science.gov (United States)

    Dias, Raphael Igor; Webster, Michael S.; Macedo, Regina H.

    2015-06-01

    Reproductive adults in many bird species are assisted by non-breeding auxiliary helpers at the nest, yet the impact of auxiliaries on reproduction is variable and not always obvious. In this study, we tested Hamilton's rule and evaluated the effect of auxiliaries on productivity in the facultative cooperative breeder campo flicker ( Colaptes campestris campestris). Campo flickers have a variable mating system, with some groups having auxiliaries and others lacking them (i.e., unassisted pairs). Most auxiliaries are closely related to the breeding pair (primary auxiliaries), but some auxiliaries (secondary auxiliaries) are unrelated females that joined established groups. We found no effect of breeder quality (body condition) or territory quality (food availability) on group productivity, but the presence of auxiliaries increased the number of fledglings produced relative to unassisted pairs. Nonetheless, the indirect benefit of helping was small and did not outweigh the costs of delayed breeding and so seemed insufficient to explain the evolution of cooperative breeding in campo flickers. We concluded that some ecological constraints must limit dispersal or independent breeding, making staying in the group a "best-of-a-bad-job" situation for auxiliaries.

  14. Circumscribing campo rupestre – megadiverse Brazilian rocky montane savanas

    Directory of Open Access Journals (Sweden)

    RJV. Alves

    Full Text Available Currently campo rupestre (CR is a name accepted and used internationally by botanists, zoologists, and other naturalists, usually applied to a very specific ecosystem, despite the lack of a consensual published circumscription. We present a tentative geographic circumscription of the term, combining data on climate, geology, geomorphology, soil, flora, fauna and vegetation. The circumscription of campo rupestre proposed herein is based on the following premises: (1 the classification of vegetation is not an exact science, and it is difficult to attain a high degree of consensus to the circumscription of vegetation names; (2 despite this, vegetation classification is useful for conservation and management. It is thus desirable to circumscribe vegetation types with the greatest attainable precision; (3 there is a need to preserve all montane and rocky vegetation types, regardless of classification, biome, etc; (4 the CRs are formed by a complex mosaic of vegetation types including rock-dwelling, psammophilous, aquatic, epiphytic, and penumbral plant communities. Campos rupestres stricto sensu are a Neotropical, azonal vegetation complex endemic to Brazil, forming a mosaic of rocky mountaintop “archipelagos” inserted within a matrix of zonal vegetation, mainly in the Cerrado and Caatinga provinces of the Brazilian Shield (southeastern, northeastern and central-western regions, occurring mainly above 900 m asl. up to altitudes exceeding 2000 m, having measured annual precipitation between 800 and 1500 mm, and an arid season of two to five months.

  15. Circumscribing campo rupestre - megadiverse Brazilian rocky montane savanas.

    Science.gov (United States)

    Alves, R J V; Silva, N G; Oliveira, J A; Medeiros, D

    2014-05-01

    Currently campo rupestre (CR) is a name accepted and used internationally by botanists, zoologists, and other naturalists, usually applied to a very specific ecosystem, despite the lack of a consensual published circumscription. We present a tentative geographic circumscription of the term, combining data on climate, geology, geomorphology, soil, flora, fauna and vegetation. The circumscription of campo rupestre proposed herein is based on the following premises: (1) the classification of vegetation is not an exact science, and it is difficult to attain a high degree of consensus to the circumscription of vegetation names; (2) despite this, vegetation classification is useful for conservation and management. It is thus desirable to circumscribe vegetation types with the greatest attainable precision; (3) there is a need to preserve all montane and rocky vegetation types, regardless of classification, biome, etc; (4) the CRs are formed by a complex mosaic of vegetation types including rock-dwelling, psammophilous, aquatic, epiphytic, and penumbral plant communities. Campos rupestres stricto sensu are a Neotropical, azonal vegetation complex endemic to Brazil, forming a mosaic of rocky mountaintop "archipelagos" inserted within a matrix of zonal vegetation, mainly in the Cerrado and Caatinga provinces of the Brazilian Shield (southeastern, northeastern and central-western regions), occurring mainly above 900 m asl. up to altitudes exceeding 2000 m, having measured annual precipitation between 800 and 1500 mm, and an arid season of two to five months.

  16. Otolith chemistry reveals seamount fidelity in a deepwater fish

    Science.gov (United States)

    Régnier, Thomas; Augley, Julian; Devalla, Sandhya; Robinson, Craig D.; Wright, Peter J.; Neat, Francis C.

    2017-03-01

    There are thousands of seamounts (underwater mountains) throughout the world's deep oceans, many of which support diverse faunal communities and valuable fish stocks. Although seamounts are often geographically and bathymetrically isolated from one another, it is not clear how biologically isolated they are from one another. We analysed the chemical signature of the otoliths of a deepwater fish, the roundnose grenadier (Coryphaenoides rupestris) to test the null hypothesis that there is random exchange between individuals from a seamount and other adjacent areas. The fish were sampled on the Scottish west coast, from the Rosemary Bank seamount and two adjacent locations of similar depth, in the same year at roughly the same time of year. We used flow-injection inductively coupled plasma mass spectrometry to measure trace element concentrations from micro-milled portions of the otolith corresponding to adult and juvenile life history stages. The elemental signatures of the fish from the seamount were distinguishable from the fish from the two other areas during both the juvenile and adult life-history phase. We infer that once juveniles settle on the seamount they remain there for the rest of their lives. Evidence for population structure should be factored into exploitation strategies to prevent local depletion and is an important consideration with respect to Rosemary bank being included in a network of Marine Protected Areas around Scotland.

  17. Science in support of the Deepwater Horizon response

    Science.gov (United States)

    Lubchenco, Jane; McNutt, Marcia K.; Dreyfus, Gabrielle; Murawski, Steven A.; Kennedy, David M.; Anastas, Paul T.; Chu, Steven; Hunter, Tom

    2012-01-01

    This introduction to the Special Feature presents the context for science during the Deepwater Horizon oil spill response, summarizes how scientific knowledge was integrated across disciplines and statutory responsibilities, identifies areas where scientific information was accurate and where it was not, and considers lessons learned and recommendations for future research and response. Scientific information was integrated within and across federal and state agencies, with input from nongovernmental scientists, across a diverse portfolio of needs—stopping the flow of oil, estimating the amount of oil, capturing and recovering the oil, tracking and forecasting surface oil, protecting coastal and oceanic wildlife and habitat, managing fisheries, and protecting the safety of seafood. Disciplines involved included atmospheric, oceanographic, biogeochemical, ecological, health, biological, and chemical sciences, physics, geology, and mechanical and chemical engineering. Platforms ranged from satellites and planes to ships, buoys, gliders, and remotely operated vehicles to laboratories and computer simulations. The unprecedented response effort depended directly on intense and extensive scientific and engineering data, information, and advice. Many valuable lessons were learned that should be applied to future events.

  18. Numerical simulation of mechanical compaction of deepwater shallow sediments

    Science.gov (United States)

    Sun, Jin; Wu, Shiguo; Deng, Jingen; Lin, Hai; Zhang, Hanyu; Wang, Jiliang; Gao, Jinwei

    2018-02-01

    To study the compaction law and overpressure evolution in deepwater shallow sediments, a large-strain compaction model that considers material nonlinearity and moving boundary is formulated. The model considers the dependence of permeability and material properties on void ratio. The modified Cam-Clay model is selected as the constitutive relations of the sediments, and the deactivation/reactivation method is used to capture the moving top surface during the deposition process. A one-dimensional model is used to study the compaction law of the shallow sediments. Results show that the settlement of the shallow sediments is large under their own weight during compaction. The void ratio decreases strictly with burial depth and decreases more quickly near the seafloor than in the deeper layers. The generation of abnormal pressure in the shallow flow sands is closely related to the compaction law of shallow sediments. The two main factors that affect the generation of overpressure in the sands are deposition rate and permeability of overlying clay sediments. Overpressure increases with an increase in deposition rate and a decrease in the permeability of the overlying clay sediment. Moreover, an upper limit for the overpressure exists. A two-dimensional model is used to study the differential compaction of the shallow sediments. The pore pressure will still increase due to the inflow of the pore fluid from the neighboring clay sediment even though the deposition process is interrupted.

  19. Hypothesis carbon flow through the deepwater Lake Ontario foodweb

    International Nuclear Information System (INIS)

    Flint, R.W.

    1986-01-01

    Several accounts in recent years have attempted to conceptualize foodwebs in valuable fishery systems, producing useful heuristic tools to help shape research and management policy. Here a mass balance conceptual model of the Lake Ontario deepwater foodweb is developed to evaluate energy pathways and determine available nutrition for predatory salmonines. A number of different trophic links were defined from phytoplankton, through the various forage species, to the tertiary consumers. Phytoplankton photosynthesis resulted in 178 g C/m/sup 2//yr production at the base of the foodweb. Approximately 60% of primary production was counted as required support for pelagic zooplankton and benthos. Dominant forage fish (alewife, smelt and sculpin) annually appeared to consume all smaller zooplankton carbon production, 93% of mysid production, 66% of most benthic community production, and, more specifically, 94% of amphipod carbon production. The model indicated that approximately 1.22 g C/m/sup 2//yr was available for support of top level predators. Based upon historic fishery records and stocking rates, these predators required approximately half of the annual carbon available as nutritional support. Impacts of trophic rearrangements in the Lake Ontario foodweb are discussed based upon model results

  20. 33 CFR 149.303 - What survival craft and rescue boats may be used on a manned deepwater port?

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What survival craft and rescue boats may be used on a manned deepwater port? 149.303 Section 149.303 Navigation and Navigable Waters... craft and rescue boats may be used on a manned deepwater port? (a) Each survival craft on a manned...

  1. Contrasting trends in North Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene

    NARCIS (Netherlands)

    Renssen, H.; Goosse, H.; Fichefet, T.

    2005-01-01

    The Holocene North Atlantic deep-water formation is studied in a 9,000-year long simulation with a coupled climate model of intermediate complexity, forced by changes in orbital forcing and atmospheric trace gas concentrations. During the experiment, deep-water formation in the Nordic Seas is

  2. Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80

    Science.gov (United States)

    Galan, M. J.; Cobos, F. J.

    1987-05-01

    El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

  3. Residual basins

    International Nuclear Information System (INIS)

    D'Elboux, C.V.; Paiva, I.B.

    1980-01-01

    Exploration for uranium carried out over a major portion of the Rio Grande do Sul Shield has revealed a number of small residual basins developed along glacially eroded channels of pre-Permian age. Mineralization of uranium occurs in two distinct sedimentary units. The lower unit consists of rhythmites overlain by a sequence of black shales, siltstones and coal seams, while the upper one is dominated by sandstones of probable fluvial origin. (Author) [pt

  4. Gas Hydrate Characterization from a 3D Seismic Dataset in the Eastern Deepwater Gulf of Mexico

    Energy Technology Data Exchange (ETDEWEB)

    McConnell, Dan

    2017-10-26

    The presence of a gas hydrate petroleum system and seismic attributes derived from 3D seismic data are used for the identification and characterization of gas hydrate deposits in the deepwater eastern Gulf of Mexico. In the central deepwater Gulf of Mexico (GoM), logging while drilling (LWD) data provided insight to the amplitude response of gas hydrate saturation in sands, which could be used to characterize complex gas hydrate deposits in other sandy deposits. In this study, a large 3D seismic data set from equivalent and distal Plio-Pleistocene sandy channel deposits in the deepwater eastern Gulf of Mexico is screened for direct hydrocarbon indicators for gas hydrate saturated sands.

  5. Applying and improving a sedimentary facies model for exploration of stratigraphic traps in the Austrian Molasse basin

    Energy Technology Data Exchange (ETDEWEB)

    Hinsch, R.; Kofler, N. [Rohoel-Aufsuchungs AG (RAG), Vienna (Austria); Hubbard, S. [Calgary Univ., Calgary (Canada). Dept. of Geology and Geophysics

    2007-09-13

    In the Molasse foreland basin of Upper Austria gas is produced from deep-water sandstones and conglomerates of the Puchkirchen and basal Hall formations (Oligocene-Lower Miocene). The basin is mature, with >750 wells drilled by RAG to date. An extensive 3-D seismic reflection dataset that covers much of the paleo-basin foredeep has been acquired in the study area over the last 15 years. Seismic stratigraphic analysis has revealed that deepwater sedimentation in the basin was dominated by a channel belt up to 5 km wide that transported sediment derived from the Central and Eastern Alps eastward along the basin axis (Linzer, 2001; de Ruig, 2003). Based on these findings, a detailed sedimentary facies model has been developed, outlining several distinct depositional elements that reveal numerous possible stratigraphic trap types (de Ruig and Hubbard, 2006). This depositional model is currently being applied and tested in exploration and refined by ongoing research. Channel abandonment and migration are important processes that resulted in stratigraphic configurations consisting of coarse-grained sandstones and conglomerates overlain by channel and overbank mudstones. This represents ideal reservoir architecture, including porous reservoir facies sealed by impermeable deposits. Additional stratigraphic trapping conditions can result from special spatial arrangements of depositional elements, for example a sandstone-filled tributary channel that is sealed by an overlying mudstone-filled abandonment channel. Recognizing and further improving such stratigraphic trapping configurations are important for future exploration in Upper Austria, where most of the structural traps have been drilled. (orig.)

  6. Classification of wetlands and deepwater habitats of the United States

    Science.gov (United States)

    Cowardin, L.M.; Carter, V.; Golet, F.C.; LaRoe, E.T.

    1985-01-01

    This classification, to be used in a new inventory of wetlands and deepwater habitats of the United States, is intended to describe ecological taxa, arrange them in a system useful to resource managers, furnish units for mapping, and provide uniformity of concepts and terms. Wetlands are defined by plants (hydrophytes), soils (hydric soils), and frequency of flooding. Ecologically related areas of deep water, traditionally not considered wetlands, are included in the classification as deepwater habitats.Systems form the highest level of the classification hierarchy; five are defined-Marine, Estuarine, Riverine, Lacustrine, and Palustrine. Marine and Estuarine Systems each have two Subsystems, Subtidal and Intertidal; the Riverine System has four Subsystems, Tidal, Lower Perennial, Upper Perennial, and Intermittent; the Lacustrine has two, Littoral and Limnetic; and the Palustrine has no Subsystems.Within the Subsystems, Classes are based on substrate material and flooding regime, or on vegetative life form. The same Classes may appear under one or more of the Systems or Subsystems. Six Classes are based on substrate and flooding regime: (1) Rock Bottom with a substrate of bedrock, boulders, or stones; (2) Unconsolidated Bottom with a substrate of cobbles, gravel, sand, mud, or organic material; (3) Rocky Shore with the same substrates as Rock Bottom; (4) Unconsolidated Shore with the same substrates as Unconsolidated Bottom; (5) Streambed with any of the substrates; and (6) Reef with a substrate composed of the living and dead remains of invertebrates (corals, mollusks, or worms). The bottom Classes, (1) and (2) above, are flooded all or most of the time and the shore Classes, (3) and (4), are exposed most of the time. The Class Streambed is restricted to channels of intermittent streams and tidal channels that are dewatered at low tide. The life form of the dominant vegetation defines the five Classes based on vegetative form: (1) Aquatic Bed, dominated by plants

  7. Marsh canopy structure changes and the Deepwater Horizon oil spill

    Science.gov (United States)

    Ramsey, Elijah W.; Rangoonwala, Amina; Jones, Cathleen E.

    2016-01-01

    Marsh canopy structure was mapped yearly from 2009 to 2012 in the Barataria Bay, Louisiana coastal region that was impacted by the 2010 Deepwater Horizon (DWH) oil spill. Based on the previously demonstrated capability of NASA's UAVSAR polarimetric synthetic aperture radar (PolSAR) image data to map Spartina alterniflora marsh canopy structure, structure maps combining the leaf area index (LAI) and leaf angle distribution (LAD, orientation) were constructed for yearly intervals that were directly relatable to the 2010 LAI-LAD classification. The yearly LAI-LAD and LAI difference maps were used to investigate causes for the previously revealed dramatic change in marsh structure from prespill (2009) to postspill (2010, spill cessation), and the occurrence of structure features that exhibited abnormal spatial and temporal patterns. Water level and salinity records showed that freshwater releases used to keep the oil offshore did not cause the rapid growth from 2009 to 2010 in marsh surrounding the inner Bay. Photointerpretation of optical image data determined that interior marsh patches exhibiting rapid change were caused by burns and burn recovery, and that the pattern of 2010 to 2011 LAI decreases in backshore marsh and extending along some tidal channels into the interior marsh were not associated with burns. Instead, the majority of 2010 to 2011 shoreline features aligned with vectors displaying the severity of 2010 shoreline oiling from the DWH spill. Although the association is not conclusive of a causal oil impact, the coexistent pattern is a significant discovery. PolSAR marsh structure mapping provided a unique perspective of marsh biophysical status that enhanced detection of change and monitoring of trends important to management effectiveness.

  8. Maximal and anaerobic threshold cardiorespiratory responses during deepwater running

    Directory of Open Access Journals (Sweden)

    Ana Carolina Kanitz

    2014-12-01

    Full Text Available DOI: http://dx.doi.org/10.5007/1980-0037.2015v17n1p41   Aquatic exercises provide numerous benefits to the health of their practitioners. To secure these benefits, it is essential to have proper prescriptions to the needs of each individual and, therefore, it is important to study the cardiorespiratory responses of different activities in this environment. Thus, the aim of this study was to compare the cardiorespiratory responses at the anaerobic threshold (AT between maximal deep-water running (DWR and maximal treadmill running (TMR. In addition, two methods of determining the AT (the heart rate deflection point [HRDP] and ventilatory method [VM] are compared in the two evaluated protocols. Twelve young women performed the two maximal protocols. Two-factor ANOVA for repeated measures with a post-hoc Bonferroni test was used (α < 0.05. Significantly higher values of maximal heart rate (TMR: 33.7 ± 3.9; DWR: 22.5 ± 4.1 ml.kg−1.min−1 and maximal oxygen uptake (TMR: 33.7 ± 3.9; DWR: 22.5 ± 4.1 ml.kg−1.min−1 in TMR compared to the DWR were found. Furthermore, no significant differences were found between the methods for determining the AT (TMR: VM: 28.1 ± 5.3, HRDP: 26.6 ± 5.5 ml.kg−1.min−1; DWR: VM: 18.7 ± 4.8, HRDP: 17.8 ± 4.8 ml.kg−1.min−1. The results indicate that a specific maximal test for the trained modality should be conducted and the HRDP can be used as a simple and practical method of determining the AT, based on which the training intensity can be determined

  9. Deep-sea benthic footprint of the deepwater horizon blowout.

    Directory of Open Access Journals (Sweden)

    Paul A Montagna

    Full Text Available The Deepwater Horizon (DWH accident in the northern Gulf of Mexico occurred on April 20, 2010 at a water depth of 1525 meters, and a deep-sea plume was detected within one month. Oil contacted and persisted in parts of the bottom of the deep-sea in the Gulf of Mexico. As part of the response to the accident, monitoring cruises were deployed in fall 2010 to measure potential impacts on the two main soft-bottom benthic invertebrate groups: macrofauna and meiofauna. Sediment was collected using a multicorer so that samples for chemical, physical and biological analyses could be taken simultaneously and analyzed using multivariate methods. The footprint of the oil spill was identified by creating a new variable with principal components analysis where the first factor was indicative of the oil spill impacts and this new variable mapped in a geographic information system to identify the area of the oil spill footprint. The most severe relative reduction of faunal abundance and diversity extended to 3 km from the wellhead in all directions covering an area about 24 km(2. Moderate impacts were observed up to 17 km towards the southwest and 8.5 km towards the northeast of the wellhead, covering an area 148 km(2. Benthic effects were correlated to total petroleum hydrocarbon, polycyclic aromatic hydrocarbons and barium concentrations, and distance to the wellhead; but not distance to hydrocarbon seeps. Thus, benthic effects are more likely due to the oil spill, and not natural hydrocarbon seepage. Recovery rates in the deep sea are likely to be slow, on the order of decades or longer.

  10. How bioavailable is highly weathered Deepwater Horizon oil?

    Science.gov (United States)

    Bostic, J.; Ziolkowski, L. A.; Reddy, C. M.; Aeppli, C.; Swarthout, B.

    2016-02-01

    Oiled sand patties continue to be deposited on northern Gulf of Mexico beaches five years after the Deepwater Horizon (DwH) oil spill. It is known that during the first 18 months post-spill, sand patties from DwH were chemically transformed, both biotically and abiotically, from wellhead release to beach deposition. However, the chemically transformed oil, which appears to become more polar over time, is not well understood in regards to its biodegradation potential. Biodegradation exerts a large control on the fate of spilled oil, representing a major conduit for its removal from the environment. To assess the bioavailability of this weathered oil, sand patties were collected from intertidal and supratidal zones of beaches in Florida, Alabama, and Mississippi in July 2015. Microbial biomarkers of the viable community, phospholipid fatty acids (PLFA), were detected on all samples collected. The PLFA distributions (mostly saturated and branched structures) and abundances (2 - 9 x 1013 cells/g sand patty) were similar across sampling locations. The positive correlation between PLFA abundance and surface area to volume ratios of sand patties indicates that microbes are preferentially inhabiting outside surfaces of the patties. We will present data on the radiocarbon (14C) content of PLFA to assess carbon (C) sources assimilated by microbes. 14C of PLFA is a powerful tool for assessing C sources assimilated in this setting. Oil has no 14C (Δ14C= -1000‰) while modern organic matter has relatively abundant 14C (Δ14C= 0‰). Fingerprinting analysis of biomarker ratios using comprehensive two-dimensional gas chromatography will be presented to ascertain if oil originated from DwH. The extent of the chemical transformation of the oil into more polar compounds will also be measured using thin layer chromatography. Results of this investigation aim to determine the bioavailability and ultimate fate of oiled sand patties that continue to wash ashore on Gulf of Mexico

  11. Late Guadalupian evolution of the Delaware Basin: insights from stable isotope and trace element geochemistry

    Science.gov (United States)

    Smith, B.; Kerans, C.

    2017-12-01

    Accurate characterization of mixed carbonate and evaporite deposits requires an understanding of basin-scale physical, chemical, and biological processes. In these settings, carbonate geochemistry often responds to changes in the prevailing conditions in the water column. It follows that the geochemical record presents a potential aid for interpretation of depositional systems provided that it is relatively free of diagenetic overprint. This is seldom the case in shallow-water settings as processes such as meteoric diagenesis and early dolomitization obscure or erase the original geochemical signal. Fine grained deep-water sediments are more likely to retain their original geochemical characteristics. If reliable shelf-to-basin correlations can be established, then basinal deposits provide critical data not only for the interpretation of deep water environments, but overall basin evolution as well. This study examines variations in trace element and stable isotope geochemistry from the Delaware Basin of West Texas and New Mexico. Interpretation of geochemical data within a pre-existing shelf-to-basin stratigraphic framework suggests a link between basin water chemistry and sea level changes during the entirety of the Guadalupian. This link is supported analogies to modern silled basins where changes in sea level and thus recharge across the sill can control nutrient input, circulation, and bottom water oxygenation. In light of these relationships, the filling of the Delaware Basin with basin-centered evaporites at the end of the Guadalupian likely represents the culmination of a more gradual, cyclic evolution towards basin restriction. Ongoing work will continue to focus on tying regional-scale changes in basin water chemistry to the combined geochemical and physical sedimentological records.

  12. Teorias sobre o amor no campo da Psicologia Social

    OpenAIRE

    Martins-Silva, Priscilla de Oliveira; Trindade, Zeidi Araujo; Silva Junior, Annor da

    2013-01-01

    Este é um ensaio teórico sobre o fenômeno amor em relacionamentos românticos no campo da Psicologia e no da Psicologia social. São apresentadas as primeiras teorias sobre o amor na Psicologia, e, posteriormente, são abordadas em maior profundidade três teorias da Psicologia social: os estilos de amor de John Alan Lee, a teoria de apego, de Phillip Shaver, Cindy Hazan e Donna Bradshaw, e a teoria triangular do amor, de Robert J. Sternberg. São apresentados os aspectos teóricos, empíricos e met...

  13. Francisco Giner de los Ríos en el campo.

    OpenAIRE

    Anónimo (siglo XX)

    2010-01-01

    1 fot.; papel. - Hombre mayor sentado en campo.Francisco Giner de los Rios, filósofo, ensayista y pedagogo. Fundador y director de la Institución Libre de Enseñanza. (Emulsión de plata de ennegrecimiento directo montada sobre cartulina del mismo tamaño. Imagen muy arrugada y dañada en márgenes. Pequeña pérdida de materia en centro de lateral derecho. Imagen amarillenta y desvanecida). - Procedencia: fondo Miguel de Unamuno. - Buena Conservación.

  14. Biomarkers of Aryl-hydrocarbon Receptor Activity in Gulf Killifish (Fundulus grandis) From Northern Gulf of Mexico Marshes Following the Deepwater Horizon Oil Spill.

    Science.gov (United States)

    Dubansky, Benjamin; Rice, Charles D; Barrois, Lester F; Galvez, Fernando

    2017-07-01

    Following the Deepwater Horizon oil spill, shorelines throughout the Barataria Basin of the northern Gulf of Mexico in Louisiana were heavily oiled for months with Macondo-252 oil, potentially impacting estuarine species. The Gulf killifish (Fundulus grandis) has been identified as a sentinel species for the study of site-specific effects of crude oil contamination on biological function. In November and December 2010, 4-5 months after the Macondo well was plugged and new oil was no longer spilling into the Gulf waters, Gulf killifish were collected across the Barataria Basin from 14 sites with varying degrees of oiling. Fish collected from oiled sites exhibited biological indications of exposure to oil, including increase in cytochrome P4501A (CYP1A) mRNA transcript and protein abundances in liver tissues. Immunohistochemistry revealed increases in gill, head kidney, and intestinal CYP1A protein at heavily oiled sites. Intestinal CYP1A protein was a sensitive indicator of exposure, indicating that intestinal tissue plays a key role in biotransformation of AHR ligands and that ingestion is a probable route of exposure, warranting additional consideration in future studies.

  15. Coquina of the Lagoa Feia formation, Campos Basin: development geology evolution; Coquinas da formacao Lagoa Feia, Bacia de Campos: evolucao da geologia de desenvolvimento

    Energy Technology Data Exchange (ETDEWEB)

    Baumgarten, Cleyton S; Dultra, Artur J.C.; Silva Scuta, Maximiano da; Figueiredo, Marcus V.L. de; Sequeira, Maria F.P.B. [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    1988-01-01

    The evolution of Lagoa Feia coquinas is analysed in its several stages, beginning with the exploratory phase. Special emphasis is devoted to the elements which contribute to improvement in geologic mapping. Development of the reservoir geology, interpretation of the factors that had influence in the reservoir pressure, communications between the fields, causing the low pressure, are discussed. The low transmissibility resultant from the heterogeneity created by the calcite and silica cementation are also reported. 11 figs., 7 refs

  16. Creencias tradicionales y campos electromagnéticos

    Directory of Open Access Journals (Sweden)

    Colin A. Ross

    2011-09-01

    Full Text Available El autor propone que existe una serie de creencias y prácticas tradicionales que pueden proporcionar pistas acerca de la interacción de campos electromagnéticos en la biosfera. Por ejemplo, la creencia en el mal de ojo puede ser una construcción cultural relacionada con la sensación de estar siendo observado, pero a su vez puede estar basada en las emisiones de ondas electromagnéticas a través de los ojos. En este artículo se presentan datos para apoyar esta hipótesis. Otras creencias tradicionales, como la importancia de la conexión con la Madre Tierra también pueden contener una explicación similar. En este artículo se presentan una serie de hipótesis científicamente verificables sobre creencias tradicionales y campos electromagnéticos. En esta fase, los datos son insuficientes para confirmar la hipótesis, no obstante el objetivo de este artículo es estimular el pensamiento crítico y la investigación sobre algunas creencias tradicionales.

  17. DIAGNOSTICO DE AFECCIONES RESPIRATORIAS EN CAMPO QUIJANO SALTA -ARGENTINA

    Directory of Open Access Journals (Sweden)

    Marta Leonor de Viana

    2008-01-01

    Full Text Available Campo Quijano está a 30 Km. de la ciudad de Salta y cuenta aproximadamente con 8300 habitantes. En el éjido urbano existen dos borateras que constituyen una fuente puntual de contaminación del aire, suelo y aguas. Se estudió la prevalencia de enfermedades respiratorias en la población urbana en el año 2005. Se trabajó con los datos de las planillas de consultas diarias externas del Hospital Francisco Herrera. Se consideraron cuatro grupos de afecciones, seleccionados por la sintomatología y su posible asociación con las emisiones gaseosas de las borateras: Rinitis; Catarro en vías aéreas superiores, Espasmos y Tos irritativa. Se estimó y comparó la prevalencia de las enfermedades por barrio con la prueba de X2 y la de los residuales ajustados de Haberman. Los espasmos y catarros en vías aéreas superiores fueron las afecciones más frecuentes en la población de Campo Quijano. En rinitis no se encontraron diferencias entre barrios. El barrio San Roque presentó las mayores prevalencias en CVAs, espasmos y tos irritativa. Barrios cercanos a las borateras presentaron prevalencias dispares, lo que podría relacionarse con características socio-culturales, sanitarias y económicas, entre otros factores de riesgo, no considerados en este diagnóstico.

  18. Literatura y derechos humanos: “un campo naciente”

    Directory of Open Access Journals (Sweden)

    M. Jimena Saenz

    2014-06-01

    Full Text Available En este trabajo se propone una exploración de uno de los más recientes movimientos conjuntivos del “derecho y”: el área o “campo naciente” que articula las relaciones entre la literatura y los derechos humanos o, en su formulación genérica, el “derecho y las humanidades”. Ello en una escala modesta que enmarca la emergencia de ese campo de estudios en un contexto general y uno de sus más claros antecedentes académicos, para en la sección central presentar con algún detalle dos de los proyectos más representativos --y discutidos-- que se han emprendido en los últimos años y que suelen considerarse fundacionales del área. Sobre el final, se plantean algunos de los problemas y perspectivas del diálogo entre los estudios literarios y los derechos humanos. 

  19. 75 FR 39518 - National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction

    Science.gov (United States)

    2010-07-09

    ... DEPARTMENT OF ENERGY National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling; Correction AGENCY: Office of Fossil Energy, Department of Energy. ACTION: Notice of open meeting... Spill and Offshore Drilling, (75 FR 37783). This document makes several corrections to that notice. FOR...

  20. 78 FR 41047 - Ultra-Deepwater and Unconventional Natural Gas and Other Petroleum Resources Research and...

    Science.gov (United States)

    2013-07-09

    ... fields in an environmentally sustainable way. Offshore, research on Ultra-Deepwater emphasizes improved understanding of systems risk, reducing risk through the acquisition of real-time information, and reducing risk... production value chain ensures that the Department of Energy's research program leverages relevant emerging...

  1. 75 FR 16370 - Regulated Navigation Areas, Safety Zones, Security Zones; Deepwater Ports in Boston Captain of...

    Science.gov (United States)

    2010-04-01

    ... rule under Executive Order 13045, Protection of Children from Environmental Health Risks and Safety Risks. This rule is not an economically significant rule and would not create an environmental risk to...] RIN 1625-AA00, RIN 1625-AA11 Regulated Navigation Areas, Safety Zones, Security Zones; Deepwater Ports...

  2. 75 FR 51374 - Regulated Navigation Areas, Safety Zones, Security Zones; Deepwater Ports in Boston Captain of...

    Science.gov (United States)

    2010-08-20

    ... Ocean off the coast of Gloucester, Massachusetts. The purpose of these regulated areas is to protect... a water area within a defined boundary for which regulations for vessels navigating within the area..., Neptune Deepwater Port (Neptune), is located in the Atlantic Ocean, approximately eight nautical miles...

  3. Deepwater Chondrichthyan Bycatch of the Eastern King Prawn Fishery in the Southern Great Barrier Reef, Australia.

    Directory of Open Access Journals (Sweden)

    Cassandra L Rigby

    Full Text Available The deepwater chondrichthyan fauna of the Great Barrier Reef is poorly known and life history information is required to enable their effective management as they are inherently vulnerable to exploitation. The chondrichthyan bycatch from the deepwater eastern king prawn fishery at the Swain Reefs in the southern Great Barrier Reef was examined to determine the species present and provide information on their life histories. In all, 1533 individuals were collected from 11 deepwater chondrichthyan species, with the Argus skate Dipturus polyommata, piked spurdog Squalus megalops and pale spotted catshark Asymbolus pallidus the most commonly caught. All but one species is endemic to Australia with five species restricted to waters offshore from Queensland. The extent of life history information available for each species varied but the life history traits across all species were characteristic of deep water chondrichthyans with relatively large length at maturity, small litters and low ovarian fecundity; all indicative of low biological productivity. However, variability among these traits and spatial and bathymetric distributions of the species suggests differing degrees of resilience to fishing pressure. To ensure the sustainability of these bycatch species, monitoring of their catches in the deepwater eastern king prawn fishery is recommended.

  4. Indicators used to monitor subsurface oil during the Deepwater Horizon Event

    Science.gov (United States)

    The Gulf of Mexico Deepwater Horizon oil spill was the largest accidental marine spill in the history of the petroleum industry. The spill was also unprecedented due to the extreme depth of the wellhead leak within the ocean, posing unique challenges to the monitoring efforts, w...

  5. The deep-water spiny lobster Palinurus gilchristi is one of five ...

    African Journals Online (AJOL)

    spamer

    The deep-water spiny lobster Palinurus gilchristi is one of five ... conditions because all features that can be used to determine the ... growth as a function of CL were calculated for each ..... (>85 mm CL) may bear eggs more than once per year.

  6. Characterization of Emissions and Residues from Simulations of the Deepwater Horizon Surface Oil Burns

    Science.gov (United States)

    The surface oil burns conducted by the U.S. Coast Guard from April to July 2010 during the Deepwater Horizon disaster in the Gulf of Mexico were simulated by small scale burns to characterize the pollutants, determine emission factors, and gather particulate matter for subsequent...

  7. Metagenomics reveals sediment microbial community response to Deepwater Horizon oil spill

    DEFF Research Database (Denmark)

    Mason, Olivia U.; Scott, Nicole M.; Gonzalez, Antonio

    2014-01-01

    The Deepwater Horizon (DWH) oil spill in the spring of 2010 resulted in an input of similar to 4.1 million barrels of oil to the Gulf of Mexico; >22% of this oil is unaccounted for, with unknown environmental consequences. Here we investigated the impact of oil deposition on microbial communities...

  8. New insights into microbial responses to oil spills from the Deepwater Horizon incident

    Energy Technology Data Exchange (ETDEWEB)

    Mason, O.U.; Hazen, T.C.

    2011-06-15

    On April 20, 2010, a catastrophic eruption of methane caused the Deepwater Horizon exploratory drill rig drilling the Macondo Well in Mississippi Canyon Block 252 (MC252) to explode. The Deepwater Horizon oil spill was unprecendeted for several reasons: the volume of oil released; the spill duration; the well depth; the distance from the shore-line (77 km or about 50 miles); the type of oil (light crude); and the injection of dispersant directly at the wellhead. This study clearly demonstrated that there was a profound and significant response by certain members of the in situ microbial community in the deep-sea in the Gulf of Mexico. In particular putative hydrocarbon degrading Bacteria appeared to bloom in response to the Deepwater Horizon oil spill, even though the temperature at these depths is never >5 C. As the plume aged the shifts in the microbial community on a temporal scale suggested that different, yet metabolically important members of the community were able to respond to a myriad of plume constituents, e.g. shifting from propane/ethane to alkanes and finally to methane. Thus, the biodegradation of hydrocarbons in the plume by Bacteria was a highly significant process in the natural attenuation of many compounds released during the Deepwater Horizon oil spill.

  9. Deepwater Horizon - Estimating surface oil volume distribution in real time

    Science.gov (United States)

    Lehr, B.; Simecek-Beatty, D.; Leifer, I.

    2011-12-01

    Spill responders to the Deepwater Horizon (DWH) oil spill required both the relative spatial distribution and total oil volume of the surface oil. The former was needed on a daily basis to plan and direct local surface recovery and treatment operations. The latter was needed less frequently to provide information for strategic response planning. Unfortunately, the standard spill observation methods were inadequate for an oil spill this size, and new, experimental, methods, were not ready to meet the operational demands of near real-time results. Traditional surface oil estimation tools for large spills include satellite-based sensors to define the spatial extent (but not thickness) of the oil, complemented with trained observers in small aircraft, sometimes supplemented by active or passive remote sensing equipment, to determine surface percent coverage of the 'thick' part of the slick, where the vast majority of the surface oil exists. These tools were also applied to DWH in the early days of the spill but the shear size of the spill prevented synoptic information of the surface slick through the use small aircraft. Also, satellite images of the spill, while large in number, varied considerably in image quality, requiring skilled interpretation of them to identify oil and eliminate false positives. Qualified staff to perform this task were soon in short supply. However, large spills are often events that overcome organizational inertia to the use of new technology. Two prime examples in DWH were the application of hyper-spectral scans from a high-altitude aircraft and more traditional fixed-wing aircraft using multi-spectral scans processed by use of a neural network to determine, respectively, absolute or relative oil thickness. But, with new technology, come new challenges. The hyper-spectral instrument required special viewing conditions that were not present on a daily basis and analysis infrastructure to process the data that was not available at the command

  10. Deepwater Nitrogen Fixation: Who's Doing it, Where, and Why?

    Science.gov (United States)

    Montoya, J. P.; Weber, S.; Vogts, A.; Voss, M.; Saxton, M.; Joye, S. B.

    2016-02-01

    Nitrogen availability frequently limits marine primary production and N2-fixation plays an important role in supporting biological production in surface waters of many oligotrophic regions. Although subsurface waters typically contain high concentrations of nitrate and other nutrients, measurements from a variety of oceanic settings show measurable, and at times high rates of N2-fixation in deep, dark waters below the mixed layer. We have explored the distribution of N2-fixation throughout the water column of the Gulf of Mexico (GoM) during a series of cruises beginning shortly after the Deepwater Horizon (DWH) spill in 2010 and continuing at roughly annual intervals. These cruises allowed us to sample oligotrophic waters across a range of depths, and to explore the connections between the C and N cycles mediated by release of oil and gas (petrocarbon) from natural seeps as well as anthropogenic sources (e.g., the DWH). We used stable isotope abundances (15N and 13C) in particles and zooplankton in combination with experimental measurements of N2-fixation and CH4 assimilation to assess the contribution of oil- and gas-derived C to the pelagic food web, and the impact of CH4 releases on the pelagic C and N cycles. Our isotopic measurements document the movement of petrocarbon into the pelagic food web, and our experiments revealed that high rates of N2-fixation were widespread in deep water immediately after the DWH incident, and restricted to the vicinity of natural seeps in subsequent years. Unfortunately, these approaches provided no insight into the organisms actually responsible for N2-fixation and CH4-assimilation. We used nano-scale Secondary Ion Mass Spectrometry (nanoSIMS) to image the organisms responsible for these processes, and molecular approaches to explore the diversity of methanotrophs and diazotrophs present in the system. The ability to resolve isotopic distributions on the scale of individual cells is a critical part of bridging the gap between

  11. Absolute Thermal SST Measurements over the Deepwater Horizon Oil Spill

    Science.gov (United States)

    Good, W. S.; Warden, R.; Kaptchen, P. F.; Finch, T.; Emery, W. J.

    2010-12-01

    Climate monitoring and natural disaster rapid assessment require baseline measurements that can be tracked over time to distinguish anthropogenic versus natural changes to the Earth system. Disasters like the Deepwater Horizon Oil Spill require constant monitoring to assess the potential environmental and economic impacts. Absolute calibration and validation of Earth-observing sensors is needed to allow for comparison of temporally separated data sets and provide accurate information to policy makers. The Ball Experimental Sea Surface Temperature (BESST) radiometer was designed and built by Ball Aerospace to provide a well calibrated measure of sea surface temperature (SST) from an unmanned aerial system (UAS). Currently, emissive skin SST observed by satellite infrared radiometers is validated by shipborne instruments that are expensive to deploy and can only take a few data samples along the ship track to overlap within a single satellite pixel. Implementation on a UAS will allow BESST to map the full footprint of a satellite pixel and perform averaging to remove any local variability due to the difference in footprint size of the instruments. It also enables the capability to study this sub-pixel variability to determine if smaller scale effects need to be accounted for in models to improve forecasting of ocean events. In addition to satellite sensor validation, BESST can distinguish meter scale variations in SST which could be used to remotely monitor and assess thermal pollution in rivers and coastal areas as well as study diurnal and seasonal changes to bodies of water that impact the ocean ecosystem. BESST was recently deployed on a conventional Twin Otter airplane for measurements over the Gulf of Mexico to access the thermal properties of the ocean surface being affected by the oil spill. Results of these measurements will be presented along with ancillary sensor data used to eliminate false signals including UV and Synthetic Aperture Radar (SAR

  12. Flood frequency matters: Why climate change degrades deep-water quality of peri-alpine lakes

    Science.gov (United States)

    Fink, Gabriel; Wessels, Martin; Wüest, Alfred

    2016-09-01

    Sediment-laden riverine floods transport large quantities of dissolved oxygen into the receiving deep layers of lakes. Hence, the water quality of deep lakes is strongly influenced by the frequency of riverine floods. Although flood frequency reflects climate conditions, the effects of climate variability on the water quality of deep lakes is largely unknown. We quantified the effects of climate variability on the potential shifts in the flood regime of the Alpine Rhine, the main catchment of Lake Constance, and determined the intrusion depths of riverine density-driven underflows and the subsequent effects on water exchange rates in the lake. A simplified hydrodynamic underflow model was developed and validated with observed river inflow and underflow events. The model was implemented to estimate underflow statistics for different river inflow scenarios. Using this approach, we integrated present and possible future flood frequencies to underflow occurrences and intrusion depths in Lake Constance. The results indicate that more floods will increase the number of underflows and the intensity of deep-water renewal - and consequently will cause higher deep-water dissolved oxygen concentrations. Vice versa, fewer floods weaken deep-water renewal and lead to lower deep-water dissolved oxygen concentrations. Meanwhile, a change from glacial nival regime (present) to a nival pluvial regime (future) is expected to decrease deep-water renewal. While flood frequencies are not expected to change noticeably for the next decades, it is most likely that increased winter discharge and decreased summer discharge will reduce the number of deep density-driven underflows by 10% and favour shallower riverine interflows in the upper hypolimnion. The renewal in the deepest layers is expected to be reduced by nearly 27%. This study underlines potential consequences of climate change on the occurrence of deep river underflows and water residence times in deep lakes.

  13. A psicologia e a constituição do campo educacional brasileiro

    OpenAIRE

    Sganderla, Ana Paola; Carvalho, Diana Carvalho de

    2010-01-01

    O presente artigo tem por objetivo discutir como a Psicologia contribuiu para a formação do campo educacional brasileiro início do século XX. Ao mesmo tempo, o campo educacional forneceu elementos fundamentais que serviram de base à constituição dessa ciência como campo científico reconhecido no País. Como base teórica para a investigação, utilizamos o conceito de campo social de Pierre Bourdieu, relacionando as implicações práticas presentes nesta constituição: Intelectualidade influente; es...

  14. La tradición del trabajo de campo en Geografía

    Directory of Open Access Journals (Sweden)

    Perla Zusman

    2011-01-01

    Full Text Available El trabajo de campo ha adquirido distintas significaciones a lo largo de la historia de la Geografía. Los cambios en la concepción de la Geografía han derivado en redefiniciones de la contribución del trabajo de campo al proceso de producción de conocimiento. El objetivo de este texto es aproximarse a los aspectos epistemológicos y políticos presentes en las distintas formas de entender el trabajo de campo. A su vez, se busca mostrar que las diversas maneras de concebir y hacer el trabajo de campo conviven en la actualidad

  15. The Morphometry of the Deep-Water Sinuous Mendocino Channel and the Immediate Environs, Northeastern Pacific Ocean

    Directory of Open Access Journals (Sweden)

    James V. Gardner

    2017-11-01

    Full Text Available Mendocino Channel, a deep-water sinuous channel located along the base of Gorda Escarpment, was for the first time completely mapped with a multibeam echosounder. This study uses newly acquired multibeam bathymetry and backscatter, together with supporting multichannel seismic and sediment core data to quantitatively describe the morphometry of the entire Mendocino Channel and to explore the age and possible causes that may have contributed to the formation and maintenance of the channel. The first 42 km of the channel is a linear reach followed for the next 83.8 km by a sinuous reach. The sinuous reach has a sinuosity index of 1.66 before it changes back to a linear reach for the next 22.2 km. A second sinuous reach is 40.2 km long and the two reaches are separated by a crevasse splay and a large landslide that deflected the channel northwest towards Gorda Basin. Both sinuous reaches have oxbow bends, cut-off meanders, interior and exterior terraces and extensive levee systems. The lower sinuous reach becomes more linear for the next 22.2 km before the channel relief falls below the resolution of the data. Levees suddenly decrease in height above the channel floor mid-way along the lower linear reach close to where the channel makes a 90° turn to the southwest. The entire channel floor is smooth at the resolution of the data and only two large mounds and one large sediment pile were found on the channel floor. The bathymetry and acoustic backscatter, together with previously collected seismic data and box and piston cores provide details to suggest Mendocino Channel may be no older than early Quaternary. A combination of significant and numerous earthquakes and wave-loading resuspension by storms are the most likely processes that generated turbidity currents that have formed and modified Mendocino Channel.

  16. Economic viability of mature fields: a successful experience; Viabilidade economica de campos maduros: uma experiencia bem sucedida

    Energy Technology Data Exchange (ETDEWEB)

    Pacheco, Almi C.; Carvalho, Antonio Marcio D.; Santana, Francisco Pablo P.; Neto, Francisco A.S.; Souza, Thiago T. [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil)

    2008-07-01

    After the end of the PETROBRAS monopoly in Brazil, the country started a new exploratory stage. Until the beginning of the pre-salt researches, the discovery of new oil mature fields was almost impossible. To take back the incentive to new researches about on-shore basins, without affect the focus on the off-shore basins, the Agencia Nacional de Petroleo, Gas Natural e Biocombustiveis (ANP) has been making efforts to increase the segment of oil medium and small size producers, who are called independent producers. To guarantee the good results, ANP has created auctions of mature and original fields of oil. The objective is to attract small and medium companies, so they can contribute to new technology of land exploration. The auctions have brought strength to the independent producers. The aim of this article is to show the case of Quiambina field, which belongs to the Campo-Escola Project, created by ANP in partnership with Universidade Federal da Bahia (UFBA) to revitalize the fields considered as matures, returned by PETROBRAS at the end of its monopoly era. To prove the economic viability of these mature shields, it will be used real values, get in the first four years of production. (author)

  17. Emissões naturais e antrópicas de nitrogênio, fósforo e metais para a bacia do Rio Macaé (Macaé, RJ, Brasil sob influência das atividades de exploração de petroleo e gás na Bacia de Campos

    Directory of Open Access Journals (Sweden)

    Mauricio Mussi Molisani

    2013-01-01

    Full Text Available Emission factors of natural processes and anthropogenic activities were used to estimate nutrients and metal loads for the lower Macaé river basin, which hosts the operational base for the offshore oil and gas exploration in the Campos Basin. The estimates indicated that emissions from anthropogenic activities are higher than natural emissions. Major contributing drivers include husbandry and urbanization, whose effluents receive no treatment. The increasing offshore oil exploration along the Brazilian littoral has resulted in rapid urbanization and, therefore might increase the inshore emission of anthropogenic chemicals in cases where effective residue control measures are not implemented in fluvial basins of the region.

  18. WITHOUT FEAR TO DARE: DIGITAL INCLUSION IN CAMPOS

    Directory of Open Access Journals (Sweden)

    Margarida Maria Mussa Tavares Gomes

    2010-05-01

    Full Text Available The debate concerning changes brought by new technologies has shown that knowledge has been increasingly pointed out as a key / crucial factor in establishing or overcoming social and economic inequality, in creating or eliminating job opportunities and, in disseminating or concentrating well-being. However, participating in the Information Society is a far reality for most of the world population. With the aim of discussing the concept of digital inclusion and possible ways of making it work, two experiments in Campos dos Goytacazes, Rio de Janeiro State, Brazil, are examined: the CITIZEN INFORMATICS PROJECT (Projeto Informática Cidadã and the SURFING IS NECESSARY PROJECT (Projeto Navegar é Preciso.

  19. Deep-water oilfield development cost analysis and forecasting —— Take gulf of mexico for example

    Science.gov (United States)

    Shi, Mingyu; Wang, Jianjun; Yi, Chenggao; Bai, Jianhui; Wang, Jing

    2017-11-01

    Gulf of Mexico (GoM) is the earliest offshore oilfield which has ever been developed. It tends to breed increasingly value of efficient, secure and cheap key technology of deep-water development. Thus, the analyze of development expenditure in this area is significantly important the evaluation concept of deep-water oilfield all over the world. This article emphasizes on deep-water development concept and EPC contract value in GoM in recent 10 years in case of comparison and selection to the economic efficiency. Besides, the QUETOR has been put into use in this research processes the largest upstream cost database to simulate and calculate the calculating examples’ expenditure. By analyzing and forecasting the deep-water oilfield development expenditure, this article explores the relevance between expenditure index and oil price.

  20. GEOMORFOLOGIA DO CAMPO DE INSELBERGUES DE QUIXADÁ, NORDESTE DO BRASIL

    Directory of Open Access Journals (Sweden)

    Rúbson Pinheiro Maia

    2015-06-01

    Full Text Available Ao norte do Maciço da Borborema, no Nordeste Brasileiro, vários campos de inselbergues caracterizam as depressões sertanejas. Esses relevos ocorrem principalmente em áreas de intrusões graníticas que atualmente estão sendo exumadas pela erosão diferencial. Em Quixadá, no estado do Ceará, ocorre um dos mais representativos campo de inselbergues do Brasil. Trata-se de diversas massas rochosas em geral côncavo-convexas ou fraturadas, formada pela exposição subaérea de um batólito granítico. Nesse trabalho, individualizamos as diversas formas de inselbergues agrupando-as segundo seus padrões morfológicos. Esses padrões foram correlacionados com as fáceis do granito e com a densidade de fraturamento. Observamos que as fáceis porfiríticas ricas em fenocristais de feldspato originaram inselbergues com feições de dissolução do tipo caneluras e vasques, enquanto as fáceis caracterizadas pela presença de diques e enclaves máficos originaram inselbergues caracterizados por feições de fraturamento do tipo taffonis de colapso. Essa correlação nos permitiu concluir que mesmo dentro de uma mesma unidade litológica como o granitoide, as variações faciológicas internas podem resultar em feições distintas de acordo com as características mineralógicas e texturais da rocha e do fraturamento.

  1. Drowning unconformity of lacustrine rift basins: A case study from the Dongying Sag in Bohai Bay Basin, China

    Science.gov (United States)

    Chen, R.; Fan, J.

    2015-12-01

    The concept of drowning unconformity of lacustrine rift basins was proposed in this paper. This paper utilized 3D seismic data, well-log and the principles methods associated with structural geology, sedimentology and geochemistry, to analyze the drowning unconformity and discuss the origins of drowning unconformity in Dongying Sag in Bohai Bay Basin.Researching on it is not only important for a better understanding of tectonic evolution, palaeogeography and sedimentation of hydrocarbon source rocks, but also a vital guiding significance for the exploration of beach-bar sandstone reservoirs and shale oil.1. The concept of drowning unconformity of lacustrine rift basins is defined. With the consequences of rapid tectonic subsidence in basin, the sharp rise of lake-level and the increased rate of accommodation(A) in basin exceeded the rate of sediment supply(S),namely A>>S, the basin suddenly transformed into deep-water settings from shallow-water settings with sudden change of sediment transport and sediment dispersal patterns. 2.The sequence surface between Sha4 and Sha3 Member of Shahejie Formation is the drowning unconformity(43.5Ma). There are the sedimentary association of the reefs in shallow lacustrine, beach-bar sandstones and glutenite fan bodies under the surface. By contrast, there are the sedimentary association of deep-lake oil shales and shales over the surface. The drowning unconformity in Dongying Sag is a tectonic revolution surface which is changed from extensional tectonics to transtensional tectonics and it is also the surface of discontinuity from shallow lacustrine to deep lacustrine. The responses to sudden changes appeared in the parameters of geophysics, geochemistry and paleontology. 3. With the penetration of India into Asia plate in NNE trending,the subduction zones of Pacific Plate retreated. It caused the rapid downwelling of asthenospheric mantle, followed by the extensive drowning unconformity.

  2. Channel Extension in Deep-Water Distributive Systems

    Science.gov (United States)

    Hoyal, D. C.; Sheets, B. A.

    2007-12-01

    acceleration to Fr'-critical conditions and the formation of a depositional hydraulic jump, which perturbs sediment transport and ends channel extension. Similar morphodynamic length scale controls are observed in shallow water fan-delta experiments (e.g., SAFL DB-03) and in 2-D depositional cyclic steps. The experiments seem to explain two interesting observations from the earlier self-organized fan experiments and from real submarine fans. Firstly, the observation of 'perched' fills at the steep entrances to salt withdrawal minibasins (e.g., in the Gulf of Mexico) suggesting higher sedimentation rates (or inefficient sediment transport) on higher slopes (initially higher than at the slope break downstream). Secondly, strong progradation as the fan evolves and slope decreases in 'perched' fans suggests increasing flow efficiency on lower slopes, at least over a certain window of parameter space. Apparently deep water systems have a tendency to self-regulate even when flows differ significantly in initial density. The observed modulation to Fr'-critical flow appears to be an important control on length scales in deep- water distributive channel systems, potentially explaining strong deepwater progradation or 'delta-like' patterns that have remained paradoxical. Near critical conditions have been inferred from observations of many active submarine fans but the extent to which these results from conservative density currents apply to non-conservative and potentially 'ignitive' turbidity currents is the subject of ongoing investigation.

  3. Radiometric age of granite from Campo Formoso, BA-Brazil - a minimum age for Jacobina group

    International Nuclear Information System (INIS)

    Torquato, J.R.; Oliveira, M.A.F.T. de; Bartels, R.L.

    1978-01-01

    The Campo Formoso granite represents the magmatic phase of the remobilized Pre-Jacobina basement, located within an are defined by the Serra de Jacobina, north of Campo Formoso, Bahia. Intrusive relationships between this granite and the Jacobina Group metasediments, gradational changes in textures and compositions between the granite and basement rocks, and the general structural-topographic expression of this suggest a mantled gneiss dome model for this area. A RB/Sr whole rock isochron age of 1911 +- 13 m.y. for the Campo Formoso granite is established. This date is interpreted as the age of the development of the structure, as well as a minimum age for the Jacobina Group metasediments. K/Ar dates on muscovites from the Campo Formoso granite are concordant with the Rb/Sr isocron. It is suggested that a lower regional thermal gradient in the Campo Formoso area during Transamazonic time is the cause for a more rapid cooling environment. (Author) [pt

  4. Methodologies of time to depth conversions in a Campos basin offshore deep water; Metodologias de conversao sismica tempo profundidade em campo gigante de aguas profundas da Bacia de Campos

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Nier M.; Gomes, Jose A.T.; Camarao, Luciano F.; Oliveira, Rildo M. de; Steagall, Daniel E.; Carvalho, Marimonica R.J. [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2004-07-01

    With the aim to drill a horizontal well in the fault shadow zone, various techniques of time to depth conversion were used in a study to minimize the uncertainties. After removing some wells close to the fault and doing a conversion only based on VELAN (Velocities from Seismic Processing) the result had a considerable difference comparing to a conversion based on VELAN and wells. After this exercise, the confidence on the seismic cube was lost, especially for new projects close to the fault. To drill new wells in that region, a geologic model without the seismic was done to predict the depth values of the top of the reservoir. In addition, a new seismic in depth using the technique PSDM (Pre Stack Depth Migration) will be generated being taken into account that geological model. (author)

  5. Densidade populacional de raposa-do-campo Lycalopex vetulus (Carnivora, Canidae em áreas de pastagem e campo sujo, Campinápolis, Mato Grosso, Brasil

    Directory of Open Access Journals (Sweden)

    Ednaldo C. Rocha

    2008-03-01

    Full Text Available Diante da crescente descaracterização do Bioma Cerrado em função da expansão da fronteira agropecuária na região central do Brasil, torna-se importante avaliar a capacidade de adaptação das espécies ao ambiente antropizado. Neste sentido, este trabalho foi desenvolvido com o objetivo de estimar e comparar a densidade populacional da raposa-do-campo Lycalopex vetulus (Lund, 1842 em duas áreas com diferentes graus de alteração, pastagem e campo sujo, em Campinápolis, Mato Grosso. Para tanto, no período entre agosto a novembro de 2005, foram efetuados censos noturnos ao longo de transectos lineares, totalizando percursos de 129,8 km na área de campo sujo e 62,08 km na área de pastagem. Estimativas de densidade populacional foram geradas utilizando o programa Distance 5.0, sendo que o modelo e ajuste mais adequados aos dados foram half-normal + hermite. Foram obtidas 23 e 52 detecções de raposas-do-campo nas áreas de campo sujo e pastagem, respectivamente. A densidade populacional de raposa-do-campo na área de pastagem (D=4,28 indivíduos/km²; IC=2,69 - 6,82 foi maior que na área de campo sujo (D=1,21 indivíduos/km²; IC=0,73 - 2,01, fato que deve estar relacionado, principalmente, com a disponibilidade de alimento e redução de potenciais predadores. Por apresentar uma dieta composta principalmente de cupins, especialmente os dos gêneros Syntermes e Cornitermes, a raposa-do-campo encontra na área de pastagem uma base alimentar abundante e estável. Além disto, a simplificação ambiental, em função da implantação de pastagens acaba por reduzir, ou até mesmo eliminar, animais que são potenciais predadores de raposas-do-campo, como Chrysocyon brachyurus (Illiger, 1815, favorecendo o aumento da densidade populacional da espécie neste tipo de ambiente. Por fim, características adaptativas apresentadas pela raposa-do-campo têm permitido que esta espécie sobreviva, inclusive apresentando elevada densidade

  6. Floating oil-covered debris from Deepwater Horizon: identification and application

    International Nuclear Information System (INIS)

    Carmichael, Catherine A; Lemkau, Karin L; Nelson, Robert K; Reddy, Christopher M; Arey, J Samuel; Graham, William M; Linn, Laura J

    2012-01-01

    The discovery of oiled and non-oiled honeycomb material in the Gulf of Mexico surface waters and along coastal beaches shortly after the explosion of Deepwater Horizon sparked debate about its origin and the oil covering it. We show that the unknown pieces of oiled and non-oiled honeycomb material collected in the Gulf of Mexico were pieces of the riser pipe buoyancy module of Deepwater Horizon. Biomarker ratios confirmed that the oil had originated from the Macondo oil well and had undergone significant weathering. Using the National Oceanic and Atmospheric Administration’s records of the oil spill trajectory at the sea surface, we show that the honeycomb material preceded the front edge of the uncertainty of the oil slick trajectory by several kilometers. We conclude that the observation of debris fields deriving from damaged marine materials may be incorporated into emergency response efforts and forecasting of coastal impacts during future offshore oil spills, and ground truthing predicative models. (letter)

  7. [Phylogenetic diversity of microorganisms associated with the deep-water sponge Baikalospongia intermedia].

    Science.gov (United States)

    Kalyzhnaya, O V; Itskovich, V B

    2014-07-01

    The diversity of bacteria associated with deep-water sponge Baikalospongia intermedia was evaluated by sequence analysis of 16S rRNA genes from two sponge samples collected in Lake Baikal from depths of 550 and 1204 m. A total of 64 operational taxonomic units, belonging to nine bacterial phyla, Proteobacteria (classes Alphaproteobacteria,. Betaproteobacteria, Gammaproteobacteria, and Deltaproteobacteria), Actinobacteria, Planctomycetes, Cloroflexi, Verrucomicrobia, Acidobacteria, Chlorobi, and Nitrospirae, including candidate phylum WS5, were identified. Phylogenetic analysis showed that the examined communities contained phylotypes exhibiting homology to uncultured bacteria from different lake ecosystems, freshwater sediments, soil and geological formations. Moreover, a number of phylotypes were relative to psychrophilic, methane-oxidizing, sulfate-reducing bacteria, and to microorganisms resistant to the influence of heavy metals. It seems likely that the unusual habitation conditions of deep-water sponges contribute to the taxonomic diversity of associated bacteria and have an influence on the presence of functionally important microorganisms in bacterial communities.

  8. Chuva de sementes em remanescentes florestais de Campo Verde, MT

    Directory of Open Access Journals (Sweden)

    William Pietro-Souza

    2014-08-01

    Full Text Available O objetivo deste trabalho consistiu em avaliar sazonalmente a produção de sementes provenientes de fragmentos florestais presentes na zona rural de Campo Verde, MT. Essa caracterização ocorreu em termos de produção de sementes e riqueza de espécies vegetais. Foram selecionados três fragmentos florestais caracterizados como Floresta Estacional Semidecidual. Em cada fragmento, cinco coletores foram instalados e confeccionados com canos de PVC (1 m²; malha de náilon de 0,001 m e 0,15 m de profundidade do bojo. O material foi coletado mensalmente, cujas sementes foram quantificadas e separadas conforme a síndrome de dispersão, etapa sucessional e forma de vida. Houve a determinação da densidade, frequência absoluta, índice de diversidade e equitabilidade. Ao todo, foram obtidas 3.622 sementes, pertencentes a 74 táxons. Maiores densidades de sementes foram observadas durante os meses de setembro, outubro e novembro. As lianas Gouania sp., Fridericia speciosa, Heteropterys sp. e Distictella sp. responderam com 55,95% do total de sementes aportadas. Das espécies que compuseram a chuva de sementes, 74% não são dispersas pelo vento. Todavia, quando se verificou a quantidade de diásporos coletados, formas dispersas pelo vento foram predominantes, representando 76% do total. Citam-se como táxons arbóreos importantes para a recomposição florestal na região de Campo Verde, situada no Sudeste de Mato Grosso: Tachigali rubiginosa, Siparuna guianensis, Nectandra sp., Cordia alliodora, Alibertia sp., Terminalia brasiliensis e Myrcia sp. Essas espécies devem ser alvo de estudos mais específicos relacionados ao seu potencial para recuperação de ambientes degradados, considerando-se as Áreas de Preservação Permanente e Reservas Legais.

  9. Galeus corriganae sp. nov., a new species of deepwater catshark (Carcharhiniformes: Pentanchidae) from Papua New Guinea.

    Science.gov (United States)

    White, William T; Mana, Ralph R; Naylor, Gavin J P

    2016-12-06

    A new species of catshark, provisionally placed in the genus Galeus, is described from Papua New Guinea based on 7 specimens collected during recent deepwater surveys of the region. The new species, Galeus corriganae, is closest to G. priapus from New Caledonia and G. gracilis from northwestern Australia but differs in several morphological characters. A reclassification of the catshark groups is required to revise the familial and generic arrangement of the group.

  10. Enrichment of Fusobacteria in Sea Surface Oil Slicks from the Deepwater Horizon Oil Spill

    OpenAIRE

    Gutierrez, Tony; Berry, David; Teske, Andreas; Aitken, Michael D.

    2016-01-01

    The Deepwater Horizon (DWH) oil spill led to rapid microbial community shifts in the Gulf of Mexico, including the formation of unprecedented quantities of marine oil snow (MOS) and of a massive subsurface oil plume. The major taxa that bloomed in sea surface oil slicks during the spill included Cycloclasticus, and to a lesser extent Halomonas, Alteromonas, and Pseudoalteromonas?organisms that grow and degrade oil hydrocarbons aerobically. Here, we show that sea surface oil slicks at DWH cont...

  11. An experiment with forced oxygenation of the deepwater of the anoxic By Fjord, Western Sweden

    DEFF Research Database (Denmark)

    Stigebrandt, Anders; Liljebladh, Bengt; De Brabandere, Loreto

    2015-01-01

    inorganic nitrogen component. The amount of phosphate in the water column decreased by a factor of 5 due to the increase in flushing and reduction in the leakage of phosphate from the sediments when the sediment surface became oxidized. Oxygenation of the sediments did not increase the leakage of toxic...... in the By Fjord and the adjacent Havsten Fjord, with oxygenated deepwater, could be detected during the experiment....

  12. ¿CUÁNTO DURA UNA INVERSIÓN DEL CAMPO MAGNÉTICO TERRESTRE? Nuevos datos de la última inversión del campo magnético terrestre

    OpenAIRE

    Sagnotti, L.

    2014-01-01

    CUÁNTO DURA UNA INVERSIÓN DEL CAMPO MAGNÉTICO TERRESTRE? El campo magnético terrestre (o campo geomagnético) está generado por el movimiento complejo que tiene lugar en el núcleo externo de la Tierra. En su mayor parte, este campo es asimilable al que generaría una barra de imán situada en el centro del planeta.

  13. Leak-off mechanism and pressure prediction for shallow sediments in deepwater drilling

    Science.gov (United States)

    Tan, Qiang; Deng, Jingen; Sun, Jin; Liu, Wei; Yu, Baohua

    2018-02-01

    Deepwater sediments are prone to loss circulation in drilling due to a low overburden gradient. How to predict the magnitude of leak-off pressure more accurately is an important issue in the protection of drilling safety and the reduction of drilling cost in deep water. Starting from the mechanical properties of a shallow formation and based on the basic theory of rock-soil mechanics, the stress distribution around a borehole was analyzed. It was found that the rock or soil on a borehole is in the plastic yield state before the effective tensile stress is generated, and the effective tangential and vertical stresses increase as the drilling fluid density increases; thus, tensile failure will not occur on the borehole wall. Based on the results of stress calculation, two mechanisms and leak-off pressure prediction models for shallow sediments in deepwater drilling were put forward, and the calculated values of these models were compared with the measured value of shallow leak-off pressure in actual drilling. The results show that the MHPS (minimum horizontal principle stress) model and the FIF (fracturing in formation) model can predict the lower and upper limits of leak-off pressure. The PLC (permeable lost circulation) model can comprehensively analyze the factors influencing permeable leakage and provide a theoretical basis for leak-off prevention and plugging in deepwater drilling.

  14. Decline in the deepwater benthic communities abundance in the Onego Lake under multifactor influence

    Directory of Open Access Journals (Sweden)

    Kalinkina Nataliya Michailovna

    2016-06-01

    Full Text Available The dynamics of deepwater benthic communities state between 1988 and 2015 was analyzed. In the last decade the decline in the deepwater benthic communities development indicators is observed in Petrozavodskaya Bay and contiguous central area of the Lake Onego. The abundance of benthos decreased by 6-7 times, biomass dropped in 2-4 times. At the same time the changes in sedimentation processes of organic matter, nutrients, iron and manganese are observed in the water ecosystem. This has resulted in an increase in the concentrations of Fe and Mn in the sediment surface layers; in pore waters up to 13 mg Fe/l and 7 mg Mn/l. The sharp increase in the content of iron and manganese in the bottom sediment can be considered as a possible factor of benthos oppression. Another reason of the benthos decrease is the reduction of anthropogenic load. Now Petrozavodskaya bay receives 3 times less light organic substances than 10 years ago. The third possible reason for the reduction of benthic communities is invasion of baikalian amphipods Gmelinoides fasciatus, resulting in the redistribution of organic matter flow from the littoral zone to the pelagic zone and depletion of deepwater benthic food resources.

  15. Simplified Model for Evaluation of VIV-induced Fatigue Damage of Deepwater Marine Risers

    Institute of Scientific and Technical Information of China (English)

    XUE Hong-xiang; TANG Wen-yong; ZHANG Sheng-kun

    2009-01-01

    A simplified empirical model for fatigue analysis of deepwater marine risers due to vortex-induced vibration (VIV) in non-uniform current is presented. A simplified modal vibration equation is employed according to the characteristics of deepwater top tensioned risers. The response amplitude of each mode is determined by a balance between the energy feeding into the riser over the lock-in regions and the energy dissipated by the fluid damping over the remainder based on the data from self-excited oscillation and forced oscillation experiments of rigid cylinders. Multi-modal VIV fatigue loading is obtained by the square root of the sum of squares approach.Compared with previous works, this model can take fully account of the main intrinsic natures of VIV for low mass ratio structures on lock-in regions, added mass and nonlinear fluid damping. In addition, a closed form solution of fatigue damage is presented for the case of a riser with uniform mass and cross-section oscillating in a uniform flow. Fatigue analysis of a typical deepwater riser operating in Gulf of Mexico and West Africa shows that the current velocity profiles affect the riser's fatigue life significantly and the most dangerous locations of the riser are also pointed out.

  16. Analysis of China Fiscal System for Deepwater Oil and Gas Development under Uncertainty

    Directory of Open Access Journals (Sweden)

    Mingming Liu

    2014-05-01

    Full Text Available World deepwater is famous for its rich oil and gas reserves, and has become an important source of global oil and gas supply, with a rising investment which will be over the shallow water counterparts in the next few years, as well as an expansion of oil and gas output. The ‘Deepwater Golden Triangle’ of the North American Gulf of Mexico, Brazil and West Africa has been leading the most exploration, development and investment activities in the world, and their experience on fiscal system during different development stages has great reference value other than advanced technologies. Under the assumptions of uncertain oil price and producing cost, this paper analyzed China fiscal system for deepwater oil and gas development, modeled the free natural resource tax, uplifting the threshold of special oil levy, and other scenarios, and compared their results on contractor’s net presented value, internal return rate and present index. Based on net present value, internal return rate, profitability index, as well as the domestic fiscal policies, this paper found that Special Oil Levy levied only on profit oil and the cancel of government share oil would have the most significant incentives, while lower the income tax rate to 15%, raising the threshold price at which the Special Oil Levy payable by 15 $/bbl and zero Value-added tax have much higher feasibility.

  17. The diversity and antibiotic properties of actinobacteria associated with endemic deepwater amphipods of Lake Baikal.

    Science.gov (United States)

    Protasov, Eugenii S; Axenov-Gribanov, Denis V; Rebets, Yuriy V; Voytsekhovskaya, Irina V; Tokovenko, Bogdan T; Shatilina, Zhanna M; Luzhetskyy, Andriy N; Timofeyev, Maxim A

    2017-12-01

    The emergence of pathogenic bacteria resistant to antibiotics increases the need for discovery of new effective antimicrobials. Unique habitats such as marine deposits, wetlands and caves or unexplored biological communities are promising sources for the isolation of actinobacteria, which are among the major antibiotic producers. The present study aimed at examining cultivated actinobacteria strains associated with endemic Lake Baikal deepwater amphipods and estimating their antibiotic activity. We isolated 42 actinobacterial strains from crustaceans belonging to Ommatogammarus albinus and Ommatogammarus flavus. To our knowledge, this is the first report describing the isolation and initial characterization of representatives of Micromonospora and Pseudonocardia genera from Baikal deepwater invertebrates. Also, as expected, representatives of the genus Streptomyces were the dominant group among the isolated species. Some correlations could be observed between the number of actinobacterial isolates, the depth of sampling and the source of the strains. Nevertheless, >70% of isolated strains demonstrated antifungal activity. The dereplication analysis of extract of one of the isolated strains resulted in annotation of several known compounds that can help to explain the observed biological activities. The characteristics of ecological niche and lifestyle of deepwater amphipods suggests that the observed associations between crustaceans and isolated actinobacteria are not random and might represent long-term symbiotic interactions.

  18. Review of Nuria del Campo Martínez: Illocutionary Constructions in English: Cognitive Motivation and Linguistic Realization (2013)

    DEFF Research Database (Denmark)

    Jensen, Kim Ebensgaard

    2014-01-01

    A review of Nuria del Campo Martínez: Illocutionary Constructions in English: Cognitive Motivation and Linguistic Realization (2013)......A review of Nuria del Campo Martínez: Illocutionary Constructions in English: Cognitive Motivation and Linguistic Realization (2013)...

  19. Writing under cover: Cristina Campo as translator of John Donne

    Directory of Open Access Journals (Sweden)

    Maria Panarello

    2009-12-01

    Full Text Available The study of Cristina Campo’s translations offers a precious contribution to those of us who are attempting to investigate the unknown area that lies in the shadowy zone between the source text and its translation. Vittoria Guerrini, a rather solitary and reticent figure in 20th-century Italian literature, wrote under several pen names, of which her favourite was Cristina Campo, the masque she chose for her beautiful and intense translations of a small but significant collection of poems by John Donne. This paper aims at exploring Cristina Campo’s attitude towards translation and the unique relationship she established with the poets she translated. John Donne’s translations reflect a singular solidarity displaying points of affinity between two extremely complex personalities. The dialogic rapport abolishes difference in space and time, as well as difference in language, as author and translator testify the same supreme tension towards beauty, truth and perfection. Translation in this perspective is a sacred gesture of mediation.

  20. municipio Antolín del Campo. Estado Nueva Esparta

    Directory of Open Access Journals (Sweden)

    Rebeca Morales A.

    2006-01-01

    Full Text Available Se caracteriza la situación actual de la Gastronomía Típica Margariteña como atractivo turístico del Municipio Antolín del Campo. Se determinan los elementos que la componen, se inventariaron los productos de la Gastronomía Típica Margariteña ofertados por los restaurantes del municipio y se identificó el tipo de promoción, se obtuvo la opinión de turistas y propietarios de los restaurantes, respecto a esta gastronomía como Atractivo Turístico. El estudio es descriptivo. Como conclusión se obtuvo que: la gastronomía Típica Margariteña no es resaltada como elemento del folklore margariteño, es ofrecida como una opción más en el menú no como plato principal, los restaurantes que ofrecen gastronomía Típica Margariteña no utilizan ningún tipo de promoción para la misma.

  1. Evaluation of elemental composition of clays from Campos Gerais (MG)

    International Nuclear Information System (INIS)

    Martins, Joao P.M.; Maduar, Marcelo F.; Silva, Paulo S.C da

    2013-01-01

    There are numerous applications given to clays including oil and water adsorbent, ceramic, whitening of beverages, porcelain, waste treatment, organic carrier molecules in cosmetics and pharmaceuticals, support for catalysts. In the pharmaceutical industry, the clays are used as excipients, diluents, desiccants, emulsifiers, to mask undesirable flavors, isotonic agent such as charger and delivery of active substances. These characteristics have contributed to the expansion of the search for applications of clay minerals in the cosmetic industry. The aim of this study was to determine the elemental composition of clays from Campos Gerais, Minas Gerais, with a view to their applicability in the production of cosmetics. The elements As, Ba, Br, Ce, Cl, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Sm, Ta, Tb, Th,U, Yb and Zn were determined by neutron activation analysis and radionuclide activity concentration of 226 Ra, 228 Ra, 210 Pb and 40 K were determined by gamma spectrometry. It was verified that the activity concentration of radionuclides was in the same concentration as the global average, indicating that these samples do not present a risk of increased radiation exposure. The concentration of most elements determined is less than or equal to the overall mean concentrations, indicated by the values of Continental Upper Crust. (author)

  2. Insomnia and hypnotic use in Campo Grande general population, Brazil

    Directory of Open Access Journals (Sweden)

    Souza José Carlos

    2002-01-01

    Full Text Available The insomnia prevalence in general population was determined by means of 408 home interviews of adults, in a representative sample of Campo Grande city, Brazil. The random sample was stratified by sex, age and economic social status. Insomnia subtypes evaluated were the disorders of sleep initiation (DSI, sleep maintenance (DSM and early awakening (DEA. A structured questionnaire was used with the consent from the interviewed subjects. Statistics used chi-square, and Fisher tests; and inferences based on binomial distribution parameters; the significance level was 5% and confidence interval (CI was 95%.The general prevalence of insomnia was 19.1% (sd=2.0%, mostly women (p=0.0015, and people of less years of schooling (p=0.0317, subtype DSI (14.2%, p=0.0043, and chronic (p=0.7022. Hypnotic drugs were used by 6.9%(sd=1.3% in the last month. Use in the last 2 years, 70.3% mostly insomniacs (p<0.0001, women (p=0.0372 and people over 30 years of age (p=0.0536.

  3. Acerca de los estilos cognitivos: dependencia- independencia de campo

    Directory of Open Access Journals (Sweden)

    Anibal Meza

    1987-12-01

    Full Text Available Se ofrece una breve revisión de la literatura sobre los Estilos Cognitivos de Dependencia- Independencia del Campo (De-le. Se hace notar la ausencia de investigaciones peruanas sobre el tema y se delimita al ámbito de la temática De-le. Se da cuenta del origen de la De-le como constructo, anclándolo al interior del constructo mayor "diferenciación psicológica". Se reseñan los modos de evaluación y se enlistan las características de la De-le como estilos cognitivos (son dimensiones penetrantes del funcionamiento individual, son variables de proceso antes que de contenido y constituyen una dimensión bipolar y de valor neutral. Se ven las relaciones De-le -conducta interpersonal: tipo de orientación interpersonal, responsividad a claves sociales e intereses y respuestas interpersonales típicas. Finalmente, se examinan los orígenes ontogenético (restringiendo la revisión a efectos de entrenamiento y la crianza infantil y cultural de la De-le.

  4. A METRIC FOR A CHIRAL POTENTIAL FIELD UNA MÉTRICA PARA UN CAMPO POTENCIAL QUIRAL

    Directory of Open Access Journals (Sweden)

    Héctor Torres-Silva

    2008-11-01

    Full Text Available In this paper we present an example of a specific metric which geometrizes explicitly a light-like four-vector potential (chiral field. The geometrization shows that such a vector has the same geometrical structure as a gravitational Kerr field. We discuss a theoretical proposition that a rotating body generates, besides a special gravitational field, a magnetic-type gauge field which might be identified with a chiral geometrized field. This chiral field represents a novel type of field because we cannot identify it with any of the known electromagnetic fields. As an application of this theory we discuss the morphology of the planets around the sun.En este trabajo se presenta un ejemplo de una métrica especifica que geometriza explícitamente un potencial cuadrivector tipo luz (campo quiral. La geometrización muestra que tal vector tiene la misma estructura geométrica que un campo gravitacional Kerr. Se discute una proposición teórica que un cuerpo rotante genera, su gravitación y el calibre de campo tipo magnético que puede ser identificado con un campo quiral geometrizado. Este campo quiral representa un tipo novedoso de campo que no puede ser identificado con alguno de los campos electromagnéticos conocidos. Como aplicación de esta teoría se discute la morfología de los planetas alrededor del sol.

  5. Evidence of deepwater spawning of fall chinook salmon (Oncorhynchus tshawytscha): spawning near Ives and Pierce Island of the Columbia River, 1999; ANNUAL

    International Nuclear Information System (INIS)

    Mueller, Robert P.; Dauble, Dennis D.

    2000-01-01

    Fall chinook salmon Oncorhynchus tshawytscha, thought to originate from Bonneville Hatchery, were first noted to be spawning downstream of Bonneville Dam by Washington Department of Fisheries and Wildlife (WDFW) biologists in 1993 (Hymer 1997). Known spawning areas include gravel beds on the Washington side of the river near Hamilton Creek and Ives island. Limited spawning ground surveys were conducted in the area around Ives and Pierce Islands during 1994-1997 and based on these surveys it was believed that fall chinook salmon successfully spawned in this area. The size of this population from 1994 to 1996 was estimated at 1,800 to 5,200 fish (Hymer 1997). Recently, chum salmon were also documented spawning downstream of Bonneville Dam. Chum salmon O. kisutch were listed as threatened under the Endangered Species Act (ESA) in March, 1999. There are several ongoing investigations to define the physical habitat characteristics associated with fall chinook and chum salmon spawning areas downstream of Bonneville Dam. A major concern is to determine what flows (i.e. surface elevations) are necessary to ensure their long-term survival. Our objective was to locate deepwater spawning locations in the main Columbia River channel and to collect additional data on physical habitat parameters at the site. This objective is consistent with the high priority that the Northwest Power Planning Council's Independent Advisory Board and the salmon managers have placed on determining the importance of mainstem habitats to the production of salmon in the Columbia River Basin

  6. Isolation By Distance (IBD) signals in the deep-water rose shrimp Parapenaeus longirostris (Lucas, 1846) (Decapoda, Panaeidae) in the Mediterranean Sea.

    Science.gov (United States)

    Lo Brutto, S; Maggio, T; Arculeo, M

    2013-09-01

    The identification of boundaries of genetic demes is one of the major goals for fishery management, and few Mediterranean commercial species have not been studied from a genetic point of view yet. The deep-water rose shrimp Parapenaeus longirostris (Lucas, 1846) is one of the most important components of commercial landings in Mediterranean, its fishery aspects have received much attention, regrettably without any concern for the genetic architecture of its populations. The population structure in the central and eastern Mediterranean Sea (captures from six Italian and two Greek landings) has been analysed on the basis of surveys carried out with mitochondrial and AFLP markers. Data revealed the presence of a gradual discrepancy along a west-east axis. This species, occurring mainly at a depth of between 100 and 400 m, is not strongly confined in isolated demes, but it demonstrates an 'Isolation By Distance' model, within the Mediterranean Sea, which includes geographical areas with a some degree of isolation. The role of hydrodynamic forces, such as currents, water fronts, is discussed; and a further evidence of the 'Levantine isolation' within Mediterranean basin is shown. Copyright © 2013 Elsevier Ltd. All rights reserved.

  7. Evaluation of elemental composition of clays from Campos Gerais (MG); Avaliacao da composicao elementar de argilas de Campos Gerais (MG)

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Joao P.M.; Maduar, Marcelo F.; Silva, Paulo S.C da, E-mail: jpmm0697@hotmail.com [Instituto de Pesquisas Energeticas e nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2013-07-01

    There are numerous applications given to clays including oil and water adsorbent, ceramic, whitening of beverages, porcelain, waste treatment, organic carrier molecules in cosmetics and pharmaceuticals, support for catalysts. In the pharmaceutical industry, the clays are used as excipients, diluents, desiccants, emulsifiers, to mask undesirable flavors, isotonic agent such as charger and delivery of active substances. These characteristics have contributed to the expansion of the search for applications of clay minerals in the cosmetic industry. The aim of this study was to determine the elemental composition of clays from Campos Gerais, Minas Gerais, with a view to their applicability in the production of cosmetics. The elements As, Ba, Br, Ce, Cl, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Sm, Ta, Tb, Th,U, Yb and Zn were determined by neutron activation analysis and radionuclide activity concentration of {sup 226}Ra, {sup 228} Ra, {sup 210}Pb and {sup 40}K were determined by gamma spectrometry. It was verified that the activity concentration of radionuclides was in the same concentration as the global average, indicating that these samples do not present a risk of increased radiation exposure. The concentration of most elements determined is less than or equal to the overall mean concentrations, indicated by the values of Continental Upper Crust. (author)

  8. Carbonate Channel-Levee Systems Influenced by Mass-Transport Deposition, Browse Basin, Australia

    Science.gov (United States)

    Dunlap, D.; Janson, X.; Sanchez-Phelps, C.; Covault, J. A.

    2017-12-01

    Submarine channels are primary conduits for clastic sediment transport to deep-water basins, thereby controlling the location of marine depocenters and sediment bypass. The evolution and depositional character of submarine channels have broad implications to sediment dispersal, sediment quality, and hydrocarbon exploration potential. Siliciclastic channel systems have been extensively studied in modern environments, seismic and outcrop; however, carbonate channel-levee deposits have only recently been explored. Here we utilize newly released high-resolution (90 Hz) seismic-reflection data from the Australian Browse Basin to document the influence of mass-transport complex (MTC) deposition on the stratigraphic architecture of carbonate channel-levee systems. The 2014 vintage seismic survey is 2500 km2 and hosts numerous large Miocene-age carbonate channel-levee complexes basinward of the shelf edge. Regional horizons and individual channel forms were mapped. Channels range from 200-300 m wide and are bounded by high-relief levee-overbank wedges (>100 ms TWTT). These channels extend across the survey area >70 km. The leveed-channels were sourced from middle and late Miocene slope gullies linked to platform carbonates. Slope-attached and locally derived MTC's are evident throughout the Miocene section likely related to periods of basin inversion and shelf-edge gully incision. We interpret that regionally extensive (>1000 km2) slope-attached MTC's can shut down a channel-levee system and trigger the initiation of a new system, whereas more locally derived (wasting and turbidity currents, which informs depositional models of carbonate slope systems and calls for re-evaluation of the controls on stratigraphic patterns in mixed siliciclastic-carbonate deep-water basins.

  9. Energy and Mass Balance At Gran Campo Nevado, Patagonia, Chile

    Science.gov (United States)

    Schneider, C.; Kilian, R.; Casassa, G.

    The Gran Campo Nevado (GCN) Ice Cap on Peninsula Muñoz Gamero, Chile, is lo- cated in the southernmost part of the Patagonian Andes at 53S. It comprises an ice cap and numerous outlet glaciers which mostly end in proglacial lakes at sea level. The total ice covered area sums up to approximately 250 km2. GCN forms the only major ice body between the Southern Patagonian Icefield and the Street of Magallan. Its almost unique location in the zone of the all-year westerlies makes it a region of key interest in terms of glacier and climate change studies of the westwind zone of the Southern Hemisphere. Mean annual temperature of approximately +5C at sea level and high precipitation of about 8.000 mm per year lead to an extreme turn-over of ice mass from the accumulation area of the GCN Ice Cap to the ablation areas of the outlet glaciers. Since October 1999 an automated weather station (AWS) is run continuously in the area at Bahia Bahamondes for monitoring climate parameters. From February to April 2000 an additional AWS was operated on Glaciar Lengua a small outlet glacier of GCN to the north-west. Ablation has been measured at stakes during the same pe- riod. The aim of this study, was to obtain point energy and mass balance on Glaciar Lengua. The work was conducted as part of the international and interdisciplinary working group SGran Campo NevadoT and supported by the German Research Foun- & cedil;dation (DFG). Energy balance was calculated using the bulk approach formulas and calibrated to the measured ablation. It turns out, that sensible heat transfer is the major contribution to the energy balance. Since high cloud cover rates prevail, air tempera- ture is the key factor for the energy balance of the glacier. Despite high rain fall rates, energy input from rain fall is of only minor importance to the overall energy balance. From the energy balance computed, it was possible to derive summer-time degree-day factors for Glaciar Lengua. With data from the nearby

  10. O PROTAGONISMO INDÍGENA ENTRE CAMPOS MULTI E INTERDISCIPLINARES

    Directory of Open Access Journals (Sweden)

    Lígia Duque Platero

    2014-12-01

    Full Text Available O livro Missões, Militância Indigenista e Protagonismo Indígena é uma coletânea de artigos que orbitam ao redor das temáticas Missões religiosas e conversão religiosa, educação, terras e reterritorialização, sempre associados à questão do protagonismo indígena. Os artigos escolhidos para esta coletânea foram trabalhos apresentados nas XIII Jornadas Internacionais sobre as Missões Jesuíticas, realizada em Dourados, no Mato Grosso do Sul, de 30 de agosto a 03 de setembro de 2010. Os organizadores são a doutora em Antropologia e Teologia Graciela Chamorro e o doutor em História Protasio Paulo Langer. Esta coletânea contém dezessete artigos e uma entrevista. Os artigos são provenientes de diversas disciplinas e alguns deles são interdisciplinares. Do campo científico, há artigos da História, Etno-história, Etno-musicologia, Antropologia, Sociologia e Geografia. O livro também contém artigos da área de Teologia. A proposta da coletânea é a reunião de artigos que expressam as intrincadas relações interculturais e interpolíticas estabelecidas entre missionários, indigenistas e os povos indígenas na América do Sul.

  11. VIII Graduação em Campo: espaço a jovens pesquisadores e incentivo à pesquisa de campo na área de Antropologia Urbana

    OpenAIRE

    2014-01-01

    Em setembro, ocorreu a oitava edição do Seminário Graduação em Campo, evento realizado pelo NAU – Núcleo de Antropologia Urbana da USP. O evento foi criado para que os alunos de graduação dos cursos de Ciências Sociais e Antropologia no Brasil pudessem apresentar seus trabalhos de pesquisa, valorizando assim a pesquisa de campo  nas diversas instituições de ensino do país. Durante o congresso, os alunos puderam assistir a filmes etnográficos e também participar de minicursos ministrados pelos...

  12. Angiosperm disjunction "Campos rupestres - restingas": a re-evaluation Disjunção de Angiospermas Campos Rupestres - Restingas: uma reavaliação

    Directory of Open Access Journals (Sweden)

    Ruy José Válka Alves

    2007-09-01

    Full Text Available A disjunct distribution pattern between the extrazonal formations of the campos rupestres (rocky grasslands in the Espinhaço mountain range and the restingas (coastal strand vegetation in Brazil has been proposed repeatedly for several flowering-plant species. In order to validate this distribution pattern, available data from the literature and major herbaria were compiled and evaluated. Some of these species also occur in campos rupestres on mountain ranges in Goiás state, campos de altitude (high altitude grasslands of the Serra do Mar, and on geologically homologous rocky formations of the Guyana shield. Species that were also recorded for distinct zonal formations like cerrado, caatinga and forests were excluded from the pattern. The campo rupestre-restinga disjunction proved valid for 9 of 56 investigated species (16%. Explanations put forth by different authors for this unusual disjunction pattern are compared in the light of geological and climatological evidence.Um padrão de distribuição disjunta entre as formações extrazonais conhecidas por campos rupestres na cadeia do Espinhaço e as restingas do litoral brasileiro vem sendo repetidamente proposto para algumas espécies de fanerógamas. Para averiguar a validade deste padrão, foram reunidos dados disponíveis em literatura e nos principais herbários. Verificou-se que algumas espécies aparecem adicionalmente nos campos rupestres das Serras de Goiás, campos de altitude da Serra do Mar, em formações rupestres geologicamente homólogas do Escudo das Guianas. Foram excluídas do padrão as espécies cuja ocorrência foi verificada também em vegetação zonal, tal como cerrado, caatinga e matas. O padrão campo rupestre-restinga se mostrou válido para 9 de 56 espécies investigadas (16%. As razões apresentadas por distintos autores para explicar este padrão peculiar de disjunção são comparadas à luz de evidências geológicas e climatológicas.

  13. Molecular diversity of bacterial communities from subseafloor rock samples in a deep-water production basin in Brazil.

    Science.gov (United States)

    von der Weid, Irene; Korenblum, Elisa; Jurelevicius, Diogo; Rosado, Alexandre Soares; Dino, Rodolfo; Sebastian, Gina Vasquez; Seldin, Lucy

    2008-01-01

    The deep subseafloor rock in oil reservoirs represents a unique environment in which a high oilcontamination and very low biomass can be observed. Sampling this environment has been a challenge owing to the techniques used for drilling and coring. In this study, the facilities developed by the Brazilian oil company PETROBRAS for accessing deep subsurface oil reservoirs were used to obtain rock samples at 2,822-2,828 m below the ocean floor surface from a virgin field located in the Atlantic Ocean, Rio de Janeiro. To address the bacterial diversity of these rock samples, PCR amplicons were obtained using the DNA from four core sections and universal primers for 16S rRNA and for APS reductase (aps) genes. Clone libraries were generated from these PCR fragments and 87 clones were sequenced. The phylogenetic analyses of the 16S rDNA clone libraries showed a wide distribution of types in the domain bacteria in the four core samples, and the majority of the clones were identified as belonging to Betaproteobacteria. The sulfate-reducing bacteria community could only be amplified by PCR in one sample, and all clones were identified as belonging to Gammaproteobacteria. For the first time, the bacterial community was assessed in such deep subsurface environment.

  14. 33 CFR 149.304 - What type and how many survival craft and rescue boats must a manned deepwater port have?

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What type and how many survival craft and rescue boats must a manned deepwater port have? 149.304 Section 149.304 Navigation and... What type and how many survival craft and rescue boats must a manned deepwater port have? (a) Except as...

  15. Stratigraphy and paleogeographic significance of a Late Pennsylvanian to Early Permian channeled slope sequence in the Darwin Basin, southern Darwin Hills, east-central California

    Science.gov (United States)

    Stevens, Calvin H.; Stone, Paul; Magginetti, Robert T.; Ritter, Scott M.

    2015-01-01

    The complex stratigraphy of late Paleozoic rocks in the southern Darwin Hills consists of regionally extensive Mississippian and Early to Middle Pennsylvanian rocks overlain by latest Pennsylvanian to Early Permian rocks, herein called the Darwin Hills sequence. Deposition of this latter sequence marked the beginning of the Darwin Basin. In Mississippian time, a carbonate platform prograded westward over slightly older slope deposits. In the Late Mississippian this platform was exposed to erosion and siliciclastic sediments were deposited. In Early to Middle Pennsylvanian time the area subsided, forming a west-facing ramp that was subjected to deformation and erosion in Middle or early Late Pennsylvanian time. Later this area was tilted westward and deep-water sediments were deposited on this slope. In latest Pennsylvanian to earliest Permian time, a major channel was cut through the older Pennsylvanian rocks and into the Upper Mississippian strata. This channel was gradually filled with increasingly finer grained, deep-water sediment as the area evolved into a basin floor by Early Permian (Sakmarian) time. Expansion of the Darwin Basin in Artinskian time led to a second phase of deposition represented by strata of the regionally extensive Darwin Canyon Formation. The geology in this small area thus documents tectonic events occurring during the early development of the Darwin Basin.

  16. Poynting's theorem for complex fields; El teorema de Poynting para campos complejos

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Guasti, M. [Universidad Autonoma Metropolitana-Unidad Iztapalapa, Mexico, D.F (Mexico)

    2001-04-01

    Poynting's theorem is derived for complex electromagnetic fields without invoking the harmonic dependence of the fields. This reformulation yields the functional form of a continuity equation. The definition of poynting's vector for complex fields reduces to its traditional definition for real fields without involving an extra factor of 1/2. [Spanish] Se presenta la derivacion del teorema de Poynting utilizando una representacion compleja de los campos electromagneticos. En esta reformulacion se obtiene cabalmente la forma funcional de una ecuacion de continuidad. Este resultado no requiere que los campos armonicos sean trenes de onda infinitos, de manera que con este formalismo es posible abordar el caso de pulsos electromagneticos. La definicion del vector Poynting para campos complejos se reduce a la definicion convencional si los campos son reales sin involucrar un factor de 1/2 adicional.

  17. Regeneration after fire in campo rupestre : Short- and long-term vegetation dynamics

    OpenAIRE

    Le Stradic , Soizig; Hernandez , Pauline; Fernandes , Geraldo Wilson; Buisson , Elise

    2018-01-01

    International audience; The Cerrado (Brazilian savanna) is the second largest biome in Brazil, covering 22% of the country, and campo rupestre is one of the most biodiverse ecosystem. Campo rupestre are extremely old mountaintop tropical ecosystems, composed of a mosaic of herbaceous, shrubland and savanna vegetation, generally located above 900 m above sea level characterized by shallow, acidic and nutrient-poor soils. In the context of increased land-use changes, effective conservation and ...

  18. British Petroleum's Deepwater Horizon Accident and the Thinking, Engaged Workforce - 13265

    Energy Technology Data Exchange (ETDEWEB)

    Rigot, William L. [Fluor Corporation, Technical Support Services (United States)

    2013-07-01

    On April 20, 2010, hydrocarbons escaped from the Macondo well into Transocean's Deepwater Horizon, resulting in fire and multiple explosions. 11 people on the rig died. The billion dollar Deepwater Horizon sank. 4.9 M gallons of product flowed from the well for 87 days creating an environmental nightmare for communities bordering on the Gulf of Mexico. BP established a $20 B reserve to pay for damages. Investigations and legal culpability continue to this day. In September 2010, the Institute for Nuclear Power Operators (INPO) issued Significant Operating Experience Report (SOER) 10-2, Engaged, Thinking Organizations. The industry had experienced 11 events, 9 in US commercial nuclear utilities, and 2 international, that had disturbing trends. The underlying causes highlighted by INPO were inadequate recognition of risk, weaknesses in application of significant operating experience, tolerance of equipment and personnel problems, and a significant drift in standards. While the noted INPO problems and the Deepwater Horizon event appear to have nothing in common, they do exhibit similarities in a drift away from expected behavior on the part of front line workers and their supervisors. At the same time, hidden hazards are accumulating in the environment leading to error intolerant conditions. Without a good understanding of this concept, many organizations tend to focus on the person who 'touched it last', while missing the deeper organizational factors that led that individual to think that what they were doing was correct. An understanding of this failure model is important in reconstruction of events and crafting effective corrective actions. It is much more important, however, for leaders in high hazard industries to recognize when they are approaching error intolerant conditions and take steps immediately to add safety margin. (authors)

  19. British Petroleum's Deepwater Horizon Accident and the Thinking, Engaged Workforce - 13265

    International Nuclear Information System (INIS)

    Rigot, William L.

    2013-01-01

    On April 20, 2010, hydrocarbons escaped from the Macondo well into Transocean's Deepwater Horizon, resulting in fire and multiple explosions. 11 people on the rig died. The billion dollar Deepwater Horizon sank. 4.9 M gallons of product flowed from the well for 87 days creating an environmental nightmare for communities bordering on the Gulf of Mexico. BP established a $20 B reserve to pay for damages. Investigations and legal culpability continue to this day. In September 2010, the Institute for Nuclear Power Operators (INPO) issued Significant Operating Experience Report (SOER) 10-2, Engaged, Thinking Organizations. The industry had experienced 11 events, 9 in US commercial nuclear utilities, and 2 international, that had disturbing trends. The underlying causes highlighted by INPO were inadequate recognition of risk, weaknesses in application of significant operating experience, tolerance of equipment and personnel problems, and a significant drift in standards. While the noted INPO problems and the Deepwater Horizon event appear to have nothing in common, they do exhibit similarities in a drift away from expected behavior on the part of front line workers and their supervisors. At the same time, hidden hazards are accumulating in the environment leading to error intolerant conditions. Without a good understanding of this concept, many organizations tend to focus on the person who 'touched it last', while missing the deeper organizational factors that led that individual to think that what they were doing was correct. An understanding of this failure model is important in reconstruction of events and crafting effective corrective actions. It is much more important, however, for leaders in high hazard industries to recognize when they are approaching error intolerant conditions and take steps immediately to add safety margin. (authors)

  20. PhaseWatcher Vx subsea for HPHT - a new deepwater multiphase and wet gas flowmeter for HPHT

    Energy Technology Data Exchange (ETDEWEB)

    Rustad, Rolf

    2010-07-01

    A new deepwater multiphase and wet gas flowmeter for HPHT applications has been developed. The flowmeter covers all multiphase and wet gas applications from heavy oil to lean and dry gas. Key features include a pressure rating of 15,000psi, a maximum process temperature of 205 C (400F) and a maximum water depth of 3500m (11500feet). This paper will discuss the design, the qualification program and the application of industry standards and codes in the qualification program. The qualification philosophy and the selected standards and codes may be applied in qualification of most types of equipment for the deepwater HPHT oil and gas industry. (Author)

  1. Characterization of deepwater invertebrates at Isla del Coco National Park and Las Gemelas Seamount, Costa Rica

    Directory of Open Access Journals (Sweden)

    Richard M. Starr

    2012-11-01

    Full Text Available The deepwater faunas of oceanic islands and seamounts of the Eastern Tropical Pacific are poorly known. From 11-22 September 2009, we conducted an exploration of the deepwater areas around Isla del Coco National Park and Las Gemelas Seamount, located about 50km southwest of Isla del Coco, Costa Rica using a manned submersible to survey the seafloor habitats. The goal of the exploration was to characterize the habitats and biota, and conduct quantitative surveys of the deepwater portions of Isla del Coco National Park and Las Gemelas. We completed a total of 22 successful submersible dives, spanning more than 80hr underwater, and collected a total of 36hr of video. With respect to invertebrates, our objectives were to gather quantitative information on species composition, density, distribution and habitat associations as well as to compare the invertebrate communities between the two sites. A total of 7 172 invertebrates were counted from analysis of the video collected on this project. Larger organisms were counted and placed into 27 taxonomic groups to characterize the deepwater invertebrate fauna of Las Gemelas Seamount and Isla del Coco National Park. The Shannon-Weiner Index for biodiversity (H’ was calculated to be 0.14 ± 0.02 for Isla del Coco and 0.07 ± 0.03 for Las Gemelas surveys. Although richness was fairly equal between the two sites, evenness was greater at Isla del Coco (J = 0.04 ± 0.006 when compared to Las Gemelas (J = 0.02 ± 0.01. This lower level of evenness in the community at Las Gemelas was a result of high densities of a few dominant species groups, specifically sea urchins and black corals. We also evaluated invertebrate percent cover at both Isla del Coco and Las Gemelas Seamount with respect to habitat type, slope and rugosity. Results indicated that highly rugose habitats contained the highest frequencies of all invertebrates at both sites, with the exception of glass sponges and polychaetes at Isla del Coco

  2. Development of the Neptune Deepwater Port: The Importance of Key Stakeholder Involvement and Benefits

    Energy Technology Data Exchange (ETDEWEB)

    Silver, Marc

    2010-09-15

    In 2005, a subsidiary of GDF SUEZ began developing the Neptune LNG Deepwater Port off the coast of Massachusetts. The project met with minimal opposition and maintained a very aggressive timeline. The reasons? Productive involvement with key stakeholders and well-defined benefits. This paper outlines the systematic approach to stakeholder outreach and mitigation planning that Neptune LNG LLC took to garner project acceptance. Details of the pre-planning phase, the stakeholder outreach phase, and the project mitigation phase are all discussed. The result was a major energy project that took less than 3.5 years to permit and 1.5 years to build.

  3. Anti-infective Discorhabdins from a Deep-Water Alaskan Sponge of the Genus Latrunculia†

    Science.gov (United States)

    Na, MinKyun; Ding, Yuanqing; Wang, Bin; Tekwani, Babu L.; Schinazi, Raymond F.; Franzblau, Scott; Kelly, Michelle; Stone, Robert; Li, Xing-Cong; Ferreira, Daneel; Hamann, Mark T.

    2016-01-01

    Bioassay- and LC-MS-guided fractionation of a methanol extract from a new deep-water Alaskan sponge species of the genus Latrunculia resulted in the isolation of two new brominated pyrroloiminoquinones, dihydrodiscorhabdin B (1) and discorhabdin Y (2), along with six known pyrroloiminoquinone alkaloids, discorhabdins A (3), C (4), E (5), and L (6), dihydrodiscorhabdin C (7), and the benzene derivative 8. Compounds 3, 4, and 7 exhibited anti-HCV activity, antimalarial activity, and selective antimicrobial activity. Although compounds 3 and 7 displayed potent and selective in vitro antiprotozoal activity, Plasmodium berghei-infected mice did not respond to these metabolites due to their toxicity in vivo. PMID:20337497

  4. Puupehenol, a potent antioxidant antimicrobial meroterpenoid from a Hawaiian deep-water Dactylospongia sp. sponge.

    Science.gov (United States)

    Hagiwara, Kehau; Garcia Hernandez, Jaaziel E; Harper, Mary Kay; Carroll, Anthony; Motti, Cherie A; Awaya, Jonathan; Nguyen, Hoang-Yen; Wright, Anthony D

    2015-02-27

    From the organic extract of a deep-water Hawaiian sponge Dactylospongia sp., a new potent antioxidant and antimicrobial meroterpenoid, puupehenol (1), was isolated. The structure of 1 was determined using spectroscopic techniques ((1)H and (13)C NMR, MS, IR, UV, [α]D). The known compound puupehenone (2) was also isolated and suggested as a probable artifact of the isolation procedures. Complete unambiguous (1)H and (13)C NMR data are provided for compounds 1 and 2. Bioassays performed with 1 and 2 showed them both to be very effective antioxidants and to have antimicrobial properties.

  5. Anti-infective discorhabdins from a deep-water alaskan sponge of the genus Latrunculia.

    Science.gov (United States)

    Na, Minkyun; Ding, Yuanqing; Wang, Bin; Tekwani, Babu L; Schinazi, Raymond F; Franzblau, Scott; Kelly, Michelle; Stone, Robert; Li, Xing-Cong; Ferreira, Daneel; Hamann, Mark T

    2010-03-26

    Bioassay- and LC-MS-guided fractionation of a methanol extract from a new deep-water Alaskan sponge species of the genus Latrunculia resulted in the isolation of two new brominated pyrroloiminoquinones, dihydrodiscorhabdin B and discorhabdin Y (2), along with six known pyrroloiminoquinone alkaloids, discorhabdins A (3), C (4), E (5), and L (6), dihydrodiscorhabdin C (7), and the benzene derivative 8. Compounds 3, 4, and 7 exhibited anti-HCV activity, antimalarial activity, and selective antimicrobial activity. Although compounds 3 and 7 displayed potent and selective in vitro antiprotozoal activity, Plasmodium berghei-infected mice did not respond to these metabolites due to their toxicity in vivo.

  6. Review of flow rate estimates of the Deepwater Horizon oil spill

    OpenAIRE

    McNutt, Marcia K.; Camilli, Rich; Crone, Timothy J.; Guthrie, George D.; Hsieh, Paul A.; Ryerson, Thomas B.; Savas, Omer; Shaffer, Frank

    2011-01-01

    The unprecedented nature of the Deepwater Horizon oil spill required the application of research methods to estimate the rate at which oil was escaping from the well in the deep sea, its disposition after it entered the ocean, and total reservoir depletion. Here, we review what advances were made in scientific understanding of quantification of flow rates during deep sea oil well blowouts. We assess the degree to which a consensus was reached on the flow rate of the well by comparing in situ ...

  7. Archaeological use of Synthetic Aperture Sonar on deepwater wreck sites in Skagerrak

    DEFF Research Database (Denmark)

    Maarleveld, Thijs J.; Ødegård, Øyvind; Hansen, Roy E.

    2018-01-01

    Marine archaeological surveying in deep waters has so far been challenging, mainly due to operational and technological constraints. The standard tool has been Side Scan Sonar (SSS) towed behind a surface vessel. Synthetic Aperture Sonar (SAS) technology is not subject to the traditional range....../resolution tradeoff, and produces results of considerably higher quality than traditional SSS. In 2015 and 2016 a comprehensive mapping of wrecks in Skagerrak, a large deepwater area off the south coast of Norway was undertaken, using an interferometric SAS system deployed on an autonomous underwater vehicle...

  8. A basin on an unstable ground: Correlation of the Middle Archaean Moodies Basin, Barberton Greenstone Belt, South Africa

    Science.gov (United States)

    Ohnemueller, Frank; Heubeck, Christoph; Kirstein, Jens; Gamper, Antonia

    2010-05-01

    The 3.22 Ga-old Moodies Group, representing the uppermost part of the Barberton Supergroup of the Barberton Greenstone Belt (BGB), is the oldest well-exposed, relatively unmetamorphosed, quartz-rich sedimentary unit on Earth. Moodies facies (north of the Inyoka Fault) were thought to be largely of alluvial, fluvial, deltaic or shallow-marine origin (Anhaeusser, 1976; Eriksson, 1980; Heubeck and Lowe, 1994) and in its upper part syndeformational. However, units can only locally be correlated, and the understanding of the interplay between Moodies sedimentation and deformation is thus limited. We mapped and measured Moodies units in the northern BGB. They partly consist of extensive turbiditic deepwater deposits, including graded bedding, flame structures, and slumped beds, interbedded with jaspilites. These contrast with shallow-water environments, south-facing progressive unconformities and overlying alluvial-fan conglomerates along the northern margin of the Saddleback Syncline further south. The palaeogeographic setting in which late BGB deformation was initiated therefore appears complex and cannot be readily explained by a simple southward-directed shortening event. In order to constrain Moodies basin setting before and during late-Moodies basin collapse, we correlated ~15 measured sections in the northern and central BGB. Most units below the Moodies Lava (MdL, ca. 3230.6+-6 Ma) can be correlated throughout although facies variations are apparent. Above the Moodies Lava, coarse-grained units can only be correlated through the Eureka Syncline and the Moodies Hills Block but not with the Saddleback Syncline. Fine-grained and jaspilitic units can be correlated throughout the northern BGB. Moodies below-wavebase deposition occurred largely north of the Saddleback Fault. The observations are consistent with a pronounced basin compartmentalization event following the eruption of the MdL which appeared to have blanketed most of the Moodies basin(s) in middle Moodies

  9. Comparison of the rift and post-rift architecture of conjugated salt and salt-free basins offshore Brazil and Angola/Namibia, South Atlantic

    Science.gov (United States)

    Strozyk, Frank; Back, Stefan; Kukla, Peter A.

    2017-10-01

    This study presents a regional comparison between selected 2D seismic transects from large, conjugated salt and salt-free basins offshore southern Brazil (Campos Basin, Santos Basin, Pelotas Basin) and southwest Africa (Kwanza Basin, northern and southern Namibe Basin, Walvis Basin). Tectonic-stratigraphic interpretation of the main rift and post-rift units, free-air gravity data and flexural isostatic backstripping were used for a comprehensive basin-to-basin documentation of key mechanisms controlling the present-day differences in conjugated and neighbouring South Atlantic basins. A significant variation in the tectonic-sedimentary architecture along-strike at each margin and between the conjugated basins across the South Atlantic reflects major differences in (1) the structural configuration of each margin segment at transitional phase between rifting and breakup, as emphasized in the highly asymmetric settings of the large Santos salt basin and the conjugated, salt-free southern Namibe Basin, (2) the post-breakup subsidence and uplift history of the respective margin segment, which caused major differences for example between the Campos and Espirito Santo basins and the conjugated northern Namibe and Kwanza basins, (3) variations in the quantity and distribution of post-breakup margin sediments, which led to major differences in the subsidence history and the related present-day basin architecture, for example in the initially rather symmetric, siliciclastic Pelotas and Walvis basins, and (4) the deposition of Aptian evaporites in the large rift and sag basin provinces north of the Rio Grande Rise and Walvis Ridge, highly contrasting the siliciclastic basins along the margin segments south of the ridges. The resulting present-day architecture of the basins can be generally classified as (i) moderately symmetric, salt-free, and magma-rich in the northern part of the southern segment, (i) highly asymmetric, salt-bearing and magma-poor vs. salt-free and magma

  10. Sources, distributions and dynamics of dissolved organic matter in the Canada and Makarov Basins

    Directory of Open Access Journals (Sweden)

    Yuan Shen

    2016-10-01

    Full Text Available A comprehensive survey of dissolved organic carbon (DOC and chromophoric dissolved organic matter (CDOM was conducted in the Canada and Makarov Basins and adjacent seas during 2010-2012 to investigate the dynamics of dissolved organic matter (DOM in the Arctic Ocean. Sources and distributions of DOM in polar surface waters were very heterogeneous and closely linked to hydrological conditions. Canada Basin surface waters had relatively low DOC concentrations (69±6 µmol L-1, CDOM absorption (a325: 0.32±0.07 m-1 and CDOM-derived lignin phenols (3±0.4 nmol L-1 and high spectral slope values (S275-295: 31.7±2.3 µm-1, indicating minor terrigenous inputs and evidence of photochemical alteration in the Beaufort Gyre. By contrast, surface waters of the Makarov Basin had elevated DOC (108±9 µmol L-1 and lignin phenol concentrations (15±3 nmol L-1, high a325 values (1.36±0.18 m-1 and low S275-295 values (22.8±0.8 µm-1, indicating pronounced Siberian river inputs associated with the Transpolar Drift and minor photochemical alteration. Observations near the Mendeleev Plain suggested limited interactions of the Transpolar Drift with Canada Basin waters, a scenario favoring export of Arctic DOM to the North Atlantic. The influence of sea-ice melt on DOM was region-dependent, resulting in an increase (Beaufort Sea, a decrease (Bering-Chukchi Seas, and negligible change (deep basins in surface DOC concentrations and a325 values. Halocline structures differed between basins, and the Canada Basin upper halocline and Makarov Basin halocline were comparable in their average DOC (65-70 µmol L-1 and lignin phenol concentrations (3-4 nmol L-1 and S275-295 values (22.9-23.7 µm-1. Deep-water DOC concentrations decreased by 6-8 µmol L-1 with increasing depth, water mass age, nutrient concentrations, and apparent oxygen utilization. Maximal estimates of DOC degradation rates (0.036-0.039 µmol L-1 yr-1 in the deep Arctic were lower than those in other ocean

  11. Sources, distributions and dynamics of dissolved organic matter in the Canada and Makarov Basins

    Science.gov (United States)

    Shen, Yuan; Benner, Ronald; Robbins, Lisa L.; Wynn, Jonathan

    2016-01-01

    A comprehensive survey of dissolved organic carbon (DOC) and chromophoric dissolved organic matter (CDOM) was conducted in the Canada and Makarov Basins and adjacent seas during 2010–2012 to investigate the dynamics of dissolved organic matter (DOM) in the Arctic Ocean. Sources and distributions of DOM in polar surface waters were very heterogeneous and closely linked to hydrological conditions. Canada Basin surface waters had relatively low DOC concentrations (69 ± 6 μmol L−1), CDOM absorption (a325: 0.32 ± 0.07 m−1) and CDOM-derived lignin phenols (3 ± 0.4 nmol L−1), and high spectral slope values (S275–295: 31.7 ± 2.3 μm−1), indicating minor terrigenous inputs and evidence of photochemical alteration in the Beaufort Gyre. By contrast, surface waters of the Makarov Basin had elevated DOC (108 ± 9 μmol L−1) and lignin phenol concentrations (15 ± 3 nmol L−1), high a325 values (1.36 ± 0.18 m−1), and low S275–295 values (22.8 ± 0.8 μm−1), indicating pronounced Siberian river inputs associated with the Transpolar Drift and minor photochemical alteration. Observations near the Mendeleev Plain suggested limited interactions of the Transpolar Drift with Canada Basin waters, a scenario favoring export of Arctic DOM to the North Atlantic. The influence of sea-ice melt on DOM was region-dependent, resulting in an increase (Beaufort Sea), a decrease (Bering-Chukchi Seas), and negligible change (deep basins) in surface DOC concentrations and a325 values. Halocline structures differed between basins, but the Canada Basin upper halocline and Makarov Basin halocline were comparable in their average DOC (65–70 μmol L−1) and lignin phenol concentrations (3–4 nmol L−1) and S275–295 values (22.9–23.7 μm−1). Deep-water DOC concentrations decreased by 6–8 μmol L−1 with increasing depth, water mass age, nutrient concentrations, and apparent oxygen utilization. Maximal estimates of DOC degradation rates (0.036–0.039 μmol L−1

  12. Mississippian carbonate buildups and development of cool-waterlike carbonate platforms in the Illinois Basin, Midcontinent U.S.A.

    Science.gov (United States)

    Lasemi, Z.; Norby, R.D.; Utgaard, J.E.; Ferry, W.R.; Cuffey, R.J.; Dever, G.R.

    2005-01-01

    Numerous biohermal buildups occur in Mississippian (Lower Carboniferous) strata in the Illinois Basin and adjacent regions. They developed as mud mounds, biodetrital calcisiltite mounds, and bryozoan frame thickets (fenestrate-frame coquina or rudstone) during the Kinderhookian and early Meramecian (Tournaisian and early Visean), and as microbial mud mounds, microbial- serpulidbryozoanboundstones, and solenoporoid (red algal) boundstones during the Chesterian (late Visean and Serpukhovian). True Waulsortian mounds did not develop in the Illinois Basin, but echinoderm (primarily crinoids)-bryozoan carbonate banks and bryozoan frame thickets generally occupied the same niche during the Kinderhookian-early Meramecian. Nutrient availability and the resulting increase in the productivity of echinoderms and bryozoans were apparently detrimental to Waulsortian mound development. Deposition of crinoidal-bryozoan carbonates during the Kinderhookian-Osagean initially occurred on a ramp setting that later evolved into a platform with a relatively steep margin through sediment aggradation and progradation. By mid-Osagean-early Meramecian, two such platforms, namely the Burlington Shelf and the Ullin Platform, developed adjacent to a deep, initially starved basin. Sedimentologic and petrographic characteristics of the Kinderhookian-earliest Meramecian carbonates resemble the modern cool-water Heterozoan Association. This is in contrast with post-earliest Meramecian carbonates, which are typically oolitic and peloidal with common peri tidal facies. The post-earliest Meramecian carbonates, therefore, resemble those of the warm-water Photozoan Association. The prevalence of Heterozoan carbonates in the Illinois Basin correlates with a rapid increase in the rate of subsidence and a major second-order eustatic sea-level rise that resulted in deep-water starved basins at this time. In the starved Illinois Basin, deposition was initially limited to a thin phosphatic shale that was

  13. UN MODELO DE CUADERNO DE CAMPO PARA UNA EXCURSIÓN GEOGRÁFICA POR LA CUENCA DE LOS RÍOS JARAMA Y HENARES

    Directory of Open Access Journals (Sweden)

    Clemente Herrero Fabregat

    2005-12-01

    Full Text Available RESUMENLas excursiones son un instrumento para que el estudiante construya su conocimiento geográfico mediante una metodología activa en la que la observación directa constituye un factor fundamental. Esta observación debe ser encauzada mediante cuadernos de campo en los que se debe ir anotando una serie de observaciones, comparaciones, conclusiones que permitan un conocimiento activo del medio geográfico y social. En este artículo se pone como modelo un trabajo de campo sobre La cuenca del río Henaresy y el borde meridional de Somosierra, con una visita al pueblo de Patones.PALABRAS CLAVE:Excursión geográfica, Observación directa, Cuaderno de Campo, Cuenca del río Henares, Borde meridional de Somosierra, Patones. SUMMARY:Excursions are a way for the improvement of the student's geographical knowledge. Direct observation is the main factor in this active methodology. This observation should be documented using field notebooks, in which findings, comparisons and conclusions should be registered, so an active knowledge of the social and geographic media could be reached. In this paper, a model con- cerning a field work on the Henares River Basin and the southern limit of Somosierra (including a visittoPatonestown isproposed. KEY WORDS:Geographic excursion, Direct observation, Field notebook, The Henares River basin, Southern limit of Somosierra, Patones town.RESUMÉLes excursions sont un instrument pour que I'étudiant construise sa connaissance géographique par une méthodologie active dans laquelle l'observation directe constitue un facteur fondamental. Cette observation doit etre acheminée au moyen de cahiers de domaine dans lesquels elle doit annoter une série d'observations, comparaisons, conclusiones qui permettent une connaissance active du milieu géographique et social. Dans cet article on met comme modele un travail de domaine sur le bassin de la riviere Henares et et le bord méridional de Somosierra, avec une visite au

  14. Vestigial phragmocone in the gladius points to a deepwater origin of squid (Mollusca: Cephalopoda)

    Science.gov (United States)

    Arkhipkin, Alexander I.; Bizikov, Vyacheslav A.; Fuchs, Dirk

    2012-03-01

    The microstructure of the gladius cone was investigated in six species of nektonic squid: shallow-water Loligo gahi (Loliginidae), pelagic eurybathic Illex argentinus, Todarodes pacificus, Dosidicus gigas (Ommastrephidae), and deepwater Onykia ingens (Onychoteuthidae) and Gonatus antarcticus (Gonatidae) using state-of-the-art microscopy. Apart from L. gahi, all other species had septa-like layers in the gladius cone, which for the first time were investigated in detail and compared with those in extinct Cretaceous belemnites Hibolithes sp. and Pachyteuthis sp., and spirulid Cyrtobelus sp. It was found that the organic layers of the gladius cone in recent squid can be homologized with the organic components of the shell in fossil phragmocone-bearing coleoids. The septa-like layers in modern gladius cones therefore represent a vestigial phragmocone composed of organic septal rudiments of the ancestral phragmocone that has lost the siphuncle and gas-filled chambers. The well-developed rostrum in onychoteuthids and small rostrum of the gladius in ommastrephids and gonatids can be seen as homologous with the belemnoid rostrum, which may indicate a close phylogenetic relationship between belemnites and at least some squid. Possible evolutionary pathways of the reduction of the functional phragmocone in squid ancestors are discussed. Several features such as the loss of shell calcification, deep water speciation, and the structure of the equilibrium organ point to a deep-water origin of squids.

  15. Buoyancy differences among two deepwater ciscoes from the Great Lakes and their putative ancestor

    Science.gov (United States)

    Krause, A.E.; Eshenroder, R.L.; Begnoche, L.J.

    2002-01-01

    We analyzed buoyancy in two deepwater ciscoes, Coregonus hoyi and C. kiyi, and in C. artedi, their putative ancestor, and also analyzed how variations in fish weight, water content, and lipid content affected buoyancy. Buoyancy was significantly different among the three species (p < 0.0001). Estimates of percent buoyancy (neutral buoyancy = 0.0%) were: kiyi, 3.8%; hoyi, 4.7%; and artedi, 5.7%. Buoyancy did not change with fish weight alone (p = 0.38). Fish weight was negatively related to water content for all three species (p = 0.037). Lipid content was not significantly different between hoyi and kiyi, but artedi had significantly fewer lipids than hoyi and kiyi (p < 0.10). When artedi was removed from the analysis, fish weight and lipids accounted for 48% of the variation in buoyancy (p = 0.003), fatter hoyi were less dense than leaner hoyi, but fatter and leaner kiyi were no different in density. Our findings provide additional evidence that buoyancy regulation was a speciating mechanism in deepwater ciscoes and that kiyi is more specialized than hoyi for diel-vertical migration in deep water.

  16. System solutions for deepwater development : an overview from the US Gulf of Mexico

    International Nuclear Information System (INIS)

    Winkler, M.M.; Arnold, P.

    1998-01-01

    The U.S. Gulf of Mexico is one of the world's dominant offshore petroleum production areas which has seen a renaissance over the past four years due to successful exploration and production activities. The different solutions used in deepwater development in that area are discussed. Much of the success in the area can be attributed to technology improvements and to geologic conditions. The economics have been enhanced by the existence of world-class reservoirs which deliver high well rates and yield high per-well recovery volumes. Recent deepwater activity in the Gulf is reviewed and the major differences between development system types are described. The strong pipeline transportation network and Gulf Coast products market are also reviewed. The industry's future prospects and the factors for continued success, such as extended reach drilling, extending subsea offset, reduced exploration well costs, low margin drilling conditions, new riser system designs, local government impact, and the impact of health, safety and environmental issues round out the discussion. 1 tab., 9 figs

  17. Methane Flux to the Atmosphere from the Deepwater Horizon Oil Leak

    Science.gov (United States)

    Yvon-Lewis, S. A.; Hu, L.; Kessler, J. D.; Garcia Tigreros, F.; Chan, E. W.; Du, M.

    2010-12-01

    The unfortunate blowout at the BP Deepwater Horizon (DWH) oil rig on April 20, which killed 11 people, was releasing oil and methane at an average rate of 58,000 barrels per day into the deep ocean, until it was recently capped resulting in a total of 4.9 million barrels released (National Incident Command Report, 2010). The methane component of the emission was estimated at 40-60%. As part of a NSF funded RAPID award, the sea-to-air flux of methane from the blowout at the Deepwater Horizon was measured on board the R/V Cape Hatteras from June 11-20 with substantial spatial and temporal resolution over the course of seven days in June 2010. Air and water concentrations were analyzed continuously from a flowing air line and a continuously flowing seawater equilibrator using cavity ring-down spectrometers (CRDS) and a gas chromatograph with a flame ionization detector (GC-FID). The results indicate a low flux of methane to the atmosphere (0.024 μmol m^{-2} d^{-1}) with atmospheric and seawater equilibrium mixing ratios averaging 1.86 ppm and 2.85 ppm, respectively within the survey area. Most of the methane emitted from the wellhead was not emitted to the atmosphere. It dissolved into the water column at depth.

  18. Mapping and Visualization of The Deepwater Horizon Oil Spill Using Satellite Imagery

    Science.gov (United States)

    Ferreira Pichardo, E.

    2017-12-01

    Satellites are man-made objects hovering around the Earth's orbit and are essential for Earth observation, i.e. the monitoring and gathering of data about the Earth's vital systems. Environmental Satellites are used for atmospheric research, weather forecasting, and warning as well as monitoring extreme weather events. These satellites are categorized into Geosynchronous and Low Earth (Polar) orbiting satellites. Visualizing satellite data is critical to understand the Earth's systems and changes to our environment. The objective of this research is to examine satellite-based remotely sensed data that needs to be processed and rendered in the form of maps or other forms of visualization to understand and interpret the satellites' observations to monitor the status, changes and evolution of the mega-disaster Deepwater Horizon Spill that occurred on April 20, 2010 in the Gulf of Mexico. In this project, we will use an array of tools and programs such as Python, CSPP and Linux. Also, we will use data from the National Oceanic and Atmospheric Administration (NOAA): Polar-Orbiting Satellites Terra Earth Observing System AM-1 (EOS AM-1), and Aqua EOS PM-1 to investigate the mega-disaster. Each of these satellites carry a variety of instruments, and we will use the data obtained from the remote sensor Moderate-Resolution Imaging Spectroradiometer (MODIS). Ultimately, this study shows the importance of mapping and visualizing data such as satellite data (MODIS) to understand the extents of environmental impacts disasters such as the Deepwater Horizon Oil spill.

  19. Assessment of the Deepwater Horizon oil spill impact on Gulf coast microbial communities

    Directory of Open Access Journals (Sweden)

    Regina eLamendella

    2014-04-01

    Full Text Available One of the major environmental concerns of the Deepwater Horizon oil spill in the Gulf of Mexico was the ecological impact of the oil that reached shorelines of the Gulf Coast. Here we investigated the impact of the oil on the microbial composition in beach samples collected in June 2010 along a heavily impacted shoreline near Grand Isle, Louisiana. Successional changes in the microbial community structure due to the oil contamination were determined by deep sequencing of 16S rRNA genes. Metatranscriptomics was used to determine expression of functional genes involved in hydrocarbon degradation processes. In addition, potential hydrocarbon-degrading Bacteria were obtained in culture. The 16S data revealed that highly contaminated samples had higher abundances of Alpha- and Gammaproteobacteria sequences. Successional changes in these classes were observed over time, during which the oil was partially degraded. The metatranscriptome data revealed that PAH, n-alkane, and toluene degradation genes were expressed in the contaminated samples, with high homology to genes from Alteromonadales, Rhodobacterales, and Pseudomonales. Notably, Marinobacter (Gammaproteobacteria had the highest representation of expressed genes in the samples. A Marinobacter isolated from this beach was shown to have potential for transformation of hydrocarbons in incubation experiments with oil obtained from the Mississippi Canyon Block 252 (MC252 well; collected during the Deepwater Horizon spill. The combined data revealed a response of the beach microbial community to oil contaminants, including prevalence of Bacteria endowed with the functional capacity to degrade oil.

  20. Longer-Term Mental and Behavioral Health Effects of the Deepwater Horizon Gulf Oil Spill

    Directory of Open Access Journals (Sweden)

    Tonya Cross Hansel

    2015-10-01

    Full Text Available Mental health issues are a significant concern after technological disasters such as the 2010 Gulf Oil Spill; however, there is limited knowledge about the long-term effects of oil spills. The study was part of a larger research effort to improve understanding of the mental and behavioral health effects of the Deepwater Horizon Gulf Oil Spill. Data were collected immediately following the spill and the same individuals were resampled again after the second anniversary (n = 314. The results show that mental health symptoms of depression, serious mental illness and posttraumatic stress have not statistically decreased, and anxiety symptoms were statistically equivalent to immediate symptoms. Results also showed that the greatest effect on anxiety is related to the extent of disruption to participants’ lives, work, family, and social engagement. This study supports lessons learned following the Exxon Valdez spill suggesting that mental health effects are long term and recovery is slow. Elevated symptoms indicate the continued need for mental health services, especially for individuals with high levels of disruption resulting in increased anxiety. Findings also suggest that the longer-term recovery trajectories following the Deepwater Horizon Gulf Oil Spill do not fall within traditional disaster recovery timelines.

  1. Basalt stratigraphy - Pasco Basin

    International Nuclear Information System (INIS)

    Waters, A.C.; Myers, C.W.; Brown, D.J.; Ledgerwood, R.K.

    1979-10-01

    The geologic history of the Pasco Basin is sketched. Study of the stratigraphy of the area involved a number of techniques including major-element chemistry, paleomagnetic investigations, borehole logging, and other geophysical survey methods. Grande Ronde basalt accumulation in the Pasco Basin is described. An illustrative log response is shown. 1 figure

  2. Melo carboniferous basin

    International Nuclear Information System (INIS)

    Flossdarf, A.

    1988-01-01

    This report is about of the Melo carboniferous basin which limits are: in the South the large and high Tupambae hill, in the west the Paraiso hill and the river mountains, in the North Yaguaron river basin to Candidata in Rio Grande del Sur in Brazil.

  3. Basin Hopping Graph

    DEFF Research Database (Denmark)

    Kucharik, Marcel; Hofacker, Ivo; Stadler, Peter

    2014-01-01

    of the folding free energy landscape, however, can provide the relevant information. Results We introduce the basin hopping graph (BHG) as a novel coarse-grained model of folding landscapes. Each vertex of the BHG is a local minimum, which represents the corresponding basin in the landscape. Its edges connect...

  4. K Basin safety analysis

    International Nuclear Information System (INIS)

    Porten, D.R.; Crowe, R.D.

    1994-01-01

    The purpose of this accident safety analysis is to document in detail, analyses whose results were reported in summary form in the K Basins Safety Analysis Report WHC-SD-SNF-SAR-001. The safety analysis addressed the potential for release of radioactive and non-radioactive hazardous material located in the K Basins and their supporting facilities. The safety analysis covers the hazards associated with normal K Basin fuel storage and handling operations, fuel encapsulation, sludge encapsulation, and canister clean-up and disposal. After a review of the Criticality Safety Evaluation of the K Basin activities, the following postulated events were evaluated: Crane failure and casks dropped into loadout pit; Design basis earthquake; Hypothetical loss of basin water accident analysis; Combustion of uranium fuel following dryout; Crane failure and cask dropped onto floor of transfer area; Spent ion exchange shipment for burial; Hydrogen deflagration in ion exchange modules and filters; Release of Chlorine; Power availability and reliability; and Ashfall

  5. New species and new records of deep-water Pectinoidea (Bivalvia: Propeamussiidae, Entoliidae and Pectinidae) from the South Pacific

    NARCIS (Netherlands)

    Dijkstra, H.H.; Maestrati, P.

    2008-01-01

    Fifty-two deep-water species of Pectinoidea (37 Propeamussiidae, 1 Entoliidae, 14 Pectinidae) are listed from Norfolk Ridge (11 species), Loyalty Islands (4 species), Fiji Islands (30 species), Tonga (26 species), Solomon Islands (26 species) and the Marquesas archipelago (8 species). All species

  6. Effects of a deep-water running program on muscle function and functionality in elderly women community dwelling

    Directory of Open Access Journals (Sweden)

    Daisy Alberti

    2017-12-01

    Full Text Available Abstract AIMS The aim of the study was to determine the effects of deep-water running on muscle function and functionality in community dwelling old women. METHODS Older women (n=19 were randomly assigned to one of the two groups: deep-water running (DWR: n=09, 64.33±4.24 years, 75.15±12.53 kg, 160.45±7.52 cm; or control group CG: n=10, 64.40±4.22 years, 74.46±12.39 kg, 158.88±5.48 cm. The DWR group carried out 18 weeks of deep-water running, twice/week 50 min sessions. Dynamic isokinetic strength for the lower limb and functionality was assessed before and after intervention. RESULTS DWR group increased peak torque, total work and average power of the knee and hip flexors and extensors. Additionally showed better performance on gait speed, timed up and go test, five-times-sit-to-stand-test repetitions from a chair as well as the six-minute walk test. CONCLUSION The deep-water running program was effective to improve muscle function and functionality.

  7. Discorhabdins S, T, and U, new cytotoxic pyrroloiminoquinones from a deep-water Caribbean sponge of the genus Batzella.

    Science.gov (United States)

    Gunasekera, Sarath P; Zuleta, Ignacio A; Longley, Ross E; Wright, Amy E; Pomponi, Shirley A

    2003-12-01

    Discorhabdins S, T, and U (1-3), three new discorhabdin analogues, have been isolated from a deep-water marine sponge of the genus Batzella. These discorhabdin analogues showed in vitro cytotoxicity against PANC-1, P-388, and A-549 cell lines. The isolation and structure elucidation of discorhabdins S, T, and U are described.

  8. Discorhabdin P, a new enzyme inhibitor from a deep-water Caribbean sponge of the genus Batzella.

    Science.gov (United States)

    Gunasekera, S P; McCarthy, P J; Longley, R E; Pomponi, S A; Wright, A E; Lobkovsky, E; Clardy, J

    1999-01-01

    Discorhabdin P (1), a new discorhabdin analogue, has been isolated from a deep-water marine sponge of the genus Batzella. Discorhabdin P (1) inhibited the phosphatase activity of calcineurin and the peptidase activity of CPP32. It also showed in vitro cytotoxicity against P-388 and A-549 cell lines. The isolation and structure elucidation of discorhabdin P (1) are described.

  9. Hamacanthins A and B, new antifungal bis indole alkaloids from the deep-water marine sponge, Hamacantha sp.

    Science.gov (United States)

    Gunasekera, S P; McCarthy, P J; Kelly-Borges, M

    1994-10-01

    Hamacanthin A [1] and hamacanthin B [2] are two bioactive dihydropyrazinonediylbis(indole) alkaloids isolated from a new species of deep-water marine sponge, Hamacantha sp. The hamacanthins are growth inhibitors of Candida albicans and Cryptococcus neoformans. Isolation and structure elucidation of 1 and 2 by nmr spectroscopy are described.

  10. Model Testing and Reliability Evalution of the New Deepwater Breakwater at La Coruña, Spain

    DEFF Research Database (Denmark)

    Burcharth, Hans Falk; Maciñeira, Enrique; Canalejo, Pedro

    2003-01-01

    A new deepwater port development at Punta Langosteira near La Coruña is under design. Shelter is provided by a 2 km long rubble mound breakwater fully exposed to Atlantic waves. Max. water depth is 45 m, crownwall crest level is + 25 m and main armour blocks are 150 t cubes. Moorings for oil...

  11. 33 CFR 165.117 - Regulated Navigation Areas, Safety and Security Zones: Deepwater Ports, First Coast Guard District.

    Science.gov (United States)

    2010-07-01

    ..., Safety and Security Zones: Deepwater Ports, First Coast Guard District. 165.117 Section 165.117... Limited Access Areas First Coast Guard District § 165.117 Regulated Navigation Areas, Safety and Security... section are designated as regulated navigation areas. (2) Safety and security zones. All waters within a...

  12. EINSTEIN EQUATIONS FOR TETRAD FIELDS ECUACIONES DE EINSTEIN PARA CAMPOS TETRADOS

    Directory of Open Access Journals (Sweden)

    Héctor Torres-Silva

    2008-11-01

    Full Text Available Every metric tensor can be expressed by the inner product of tetrad fields. We prove that Einstein's equations for these fields have the same form as the stress-energy tensor of electromagnetism if the total external current . Using the Evans' unified field theory, we show that the true unification of gravity and electromagnetism is with source-free Maxwell equations.Todo tensor métrico puede ser expresado por el producto interno de campos tetrados. Se prueba que las ecuaciones de Einstein para esos campos tienen la misma forma que el tensor electromagnético de momento-energía si la corriente externa total es igual a cero. Usando la teoría de campo unificado de Evans se muestra que la verdadera unificación de la gravedad y el electromagnetismo es con las ecuaciones de Maxwell sin fuentes.

  13. As possibilidades analíticas da noção de campo social

    Directory of Open Access Journals (Sweden)

    Afrânio Mendes Catani

    2011-03-01

    Full Text Available O texto procura, num primeiro momento, discutir a noção de campo social, desenvolvida pelo sociólogo francês Pierre Bourdieu (1930-2002 para, em seguida, pensar o campo universitário em suas especificidades, esboçando possibilidades analíticas para o caso brasileiro a partir de seu clássico livro La noblesse d´État. Grandes Écoles et esprit de corps (1989. Embora desenvolvido por Bourdieu com a finalidade de estudar mecanismos de dominação vigentes na sociedade francesa, pretende-se indicar como esse aparato epistêmico prático pode, através do estabelecimento de relações de homologia, ser trabalhado para o estudo do campo universitário brasileiro.

  14. Development of ceramic with clays from Campos dos Goytacazes and Itaborai

    International Nuclear Information System (INIS)

    Ribeiro, A.P.; Babisk, M.P.; Monteiro, S.N.; Vieira, C.M.F.

    2012-01-01

    The county of Campos dos Goytacazes, located in the north region of the State of Rio de Janeiro, currently is the leading red ceramic pole of the State. However, the clays are kaolinitic predominance with low amount of flux oxides as well as elevated loss on ignition. In this work compositions were investigated using of a clay from the county of Itaborai, that is approximately 200 km away from Campos, to correct the deficiencies of the clay from Campos and so to improve the the technological properties of the ceramic. Rectangular specimens were prepared by uniaxial mold-press at 18 MPa and then fired at 800 deg C. The evaluated physical and mechanical properties were: plasticity, linear shrinkage, water absorption and flexural rupture strength. The results indicated that the clay from Itaborai significantly improves the evaluated properties of the ceramic. (author)

  15. Campo magnético generado por N bobinas alineadas axialmente

    OpenAIRE

    César Gutiérrez Tapia; Javier González Damián

    2002-01-01

    El cálculo del campo magnético generado por n bobinas axialmente alineadas permanece como un importante problema técnico en el proceso de construcción de los diferentes dispositivos para confinar el plasma con perfiles de campo externo tipo espejo. A partir de los métodos numéricos existentes para el cálculo de las integrales elípticas de primera clase k y segunda clase e, se describe la obtención de expresiones simples para calcular el campo magnético por el método de las ecuaciones elíptica...

  16. A modelagem científica vista como um campo conceitual

    Directory of Open Access Journals (Sweden)

    Rafael Vasques Brandão

    2011-01-01

    Full Text Available http://dx.doi.org/10.5007/2175-7941.2011v28n3p507 Este trabalho defende a tese de que o processo de modelagem científica pode ser visto como um campo conceitual subjacente ao domínio de campos conceituais específicos em Física e possui implicações relevantes para o Ensino de Física e a pesquisa nessa área centrados na estratégia didática da modelagem. Para tanto, apoia-se na visão epistemológica de Mario Bunge sobre modelagem científica e na Teoria dos Campos Conceituais de Gérard Vergnaud, levando em conta as ideias de Weil-Barais e Vergnaud sobre concepções em Física.

  17. The Ogaden Basin, Ethiopia: an underexplored sedimentary basin

    Energy Technology Data Exchange (ETDEWEB)

    Teitz, H.H.

    1991-01-01

    A brief article examines the Ogaden Basin in Ethiopia in terms of basin origin, basin fill and the hydrocarbon exploration history and results. The natural gas find in pre-Jurassic sandstones, which appears to contain substantial reserves, justifies continuing investigations in this largely underexplored basin. (UK).

  18. Occurrence and biogeography of hydroids (Cnidaria: Hydrozoa) from deep-water coral habitats off the southeastern United States

    Science.gov (United States)

    Henry, Lea-Anne; Nizinski, Martha S.; Ross, Steve W.

    2008-06-01

    Deep-water coral habitats off the southeastern USA (SEUS) support diverse fish and invertebrate assemblages, but are poorly explored. This study is the first to report on the hydroids collected from these habitats in this area. Thirty-five species, including two species that are likely new to science, were identified from samples collected primarily by manned submersible during 2001-2005 from deep-water coral habitats off North Carolina to east-central Florida. Eleven of the species had not been reported since the 19th to mid-20th century. Ten species, and one family, the Rosalindidae, are documented for the first time in the SEUS. Latitudinal ranges of 15 species are extended, and the deepest records in the western North Atlantic for 10 species are reported. A species accumulation curve illustrated that we continue to add to our knowledge of hydroid diversity in these habitats. Sexually mature individuals were collected for 19 species during the summer to early autumn months. Most of the observed species (89%) liberate planula larvae as part of their life cycles, suggesting that these species exhibit a reproductive strategy that reduces the risk of dispersal to sub-optimal habitats. Hydroids occurred across various substrata including coral rubble, live corals, rock and other animal hosts including hydroids themselves. All observed species were regionally widespread with typically deep-neritic to bathyal sub-tropical/tropical distributions. Hydroid assemblages from deep-water SEUS coral habitats were most similar to those from adjacent deep-water habitats off the SEUS (17 shared species), and those in the Straits of Florida/Bahamas and Caribbean/West Indian regions (14 and 8 shared species, respectively). The similarity to sub-tropical and tropical assemblages and the richness of plumularioids in the SEUS deep-water coral habitats support the idea of a Pleistocene intrusion of tropical species northwards following an intensification of the Gulf Stream from the

  19. Diet and habitat use by age-0 deepwater sculpins in northern Lake Huron, Michigan and the Detroit River

    Science.gov (United States)

    Roseman, Edward F.

    2014-01-01

    Deepwater sculpins (Myoxocephalus thompsonii) are an important link in deepwater benthic foodwebs of the Great Lakes. Little information exists about deepwater sculpin spawning habits and early life history ecology due to difficulty in sampling deep offshore habitats. Larval and age-0 deepwater sculpins collected in northern Lake Huron and the Detroit River during 2007 were used to improve our understanding of their habitat use, diet, age, and growth. Peak larval density reached 8.4/1000 m3 in the Detroit River during April and was higher than that in Lake Huron. Offshore bottom trawls at DeTour and Hammond Bay first collected benthic age-0 deepwater sculpins in early September when fish were ≥ 25 mm TL. Otolith analysis revealed that hatch dates for pelagic larvae occurred during late March and larvae remained pelagic for 40 to 60 days. Diet of pelagic larvae (10–21 mm TL) was dominated by calanoid copepods at all sample locations. Diets of benthic age-0 fish varied by location and depth: Mysis and chironomids were prevalent in fish from Hammond Bay and the 91 m site at DeTour, but only chironomids were found in fish from the 37 m DeTour site. This work showed that nearshore epilimnetic sites were important for pelagic larvae and an ontogenetic shift from pelagic planktivore to benthivore occurred at about 25 mm TL in late summer. Age analysis showed that larvae remained pelagic long enough to be transported through the St. Clair–Detroit River system, Lake Erie, and the Niagara River, potentially contributing to populations in Lake Ontario.

  20. O campo dos economistas franceses no fim dos anos 90: lutas de fronteira, autonomia e estrutura

    Directory of Open Access Journals (Sweden)

    Frédéric Lebaron

    2001-04-01

    Full Text Available A noção de economista, longe de simples e evidente, é objeto de numerosas lutas de definição. O exemplo do campo dos economistas franceses, analisado a partir de um conjunto de entrevistas, observações de dados prosopográficos, revela certas características dessas lutas. Estas opõem detendores de formas diferenciadas de capital, que estão elas mesmas em correspondência com posições distintas no campo do poder. Nessas lutas, estão em questão ao mesmo tempo a autonomia e a estrutura desse campo científico. A fraca autonomia relativa do campo da ciência econômica se faz acompanhar de uma forte homologia entre a estrutura desse campo e aquela do campo do poder francês em seu conjunto.The concept of the economist, rather than being a simple and evident one, is the object of numerous conflicting definitions. The example of the field of French economists, as analysed in a set of interviews and the observation of prospographical data, reveal certain characteristics of these conflicts. These struggles oppose those who detain differentiated forms of capital, which are themselves in correspondence with distinct positions in the field of power. These conflicts put into question both the autonomy and the structure of this scientific field. The relatively weak autonomy of the field of economical sciences is followed by a strong homology between the structure of this field and that of the field of French power in its entirety.

  1. Nuevos campos de precipitación media anual para Colombia

    OpenAIRE

    Álvarez Villa, Oscar David; Vélez Upegui, Jaime Ignacio; Poveda Jaramillo, Germán

    2008-01-01

    Se obtiene un campo de intensidad de precipitación promedio para el territorio colombiano mediante el análisis de los datos proporcionados de forma gratuita por la mision TRMM, el cual se ha empleado como información secundaria para la estimación de nuevos campos de precipitación para Colombia. Se comprobo que dicha información secundaria manifiesta muchas de las características físicas del fenómeno de precipitación. Además se mostro que presenta una fuerte correlación con los promedios d...

  2. Acuidade visual e eletrorretinografia de campo total em pacientes com síndrome de Usher

    OpenAIRE

    Mendieta,Luana; Berezovsky,Adriana; Salomão,Solange Rios; Sacai,Paula Yuri; Pereira,Josenilson Martins; Fantini,Sérgio Costa

    2005-01-01

    A síndrome de Usher (SU) é doença autossômica recessiva caracterizada por perda auditiva neuro-sensorial acompanhada de retinose pigmentária (RP). OBJETIVO: Analisar a eletrorretinografia de campo total (ERG) e a acuidade visual (AV) em pacientes com síndrome de Usher tipos I e II. MÉTODOS: Foram estudadas as respostas da eletrorretinografia de campo total e a acuidade visual de 22 pacientes (idade média = 26,8±16,8 anos). Destes, 17 tinham síndrome de Usher tipo I e 5 tinham síndrome ...

  3. Aplicación móvil para medir campos magnéticos

    OpenAIRE

    Valdecantos Perales, Víctor; González, Manuel Á.

    2015-01-01

    Este proyecto tiene como objetivo medir el campo magnético en cualquier punto de la tierra mediante un dispositivo móvil con sistema operativo Android. Con estas medidas se quieren crear puntos sobre un mapa mundial que reflejen la intensidad y sentido del campo. Estos dispositivos cuentan con un gran número de sensores tales como sensor de proximidad, acelerómetro, temperatura, gravedad, luz... pero este proyecto se van a utilizar sólo dos de esos sensores: el acelerómetro y sensor magnético...

  4. Manual de métodos de campo para el monitoreo de aves terrestres

    Science.gov (United States)

    C. John Ralph; Geoffrey R. Geupel; Peter Pyle; Thomas E. Martin; David F DeSante; Borja Milá

    1996-01-01

    El presente manual es una recopilación de métodos de campo para la determinación de índices de abundancia y datos demográficos de poblaciones de aves terrestres en una amplia variedad de hábitats. Está dirigido a biólogos, técnicos de campo, e investigadores de cualquier parte del Continente Americano. Los métodos descritos incluyen cuatro tipos de censos...

  5. María Zambrano e Cristina Campo: amicizia e destino

    Directory of Open Access Journals (Sweden)

    Adele Ricciotti

    2014-01-01

    Full Text Available Il presente saggio intende analizzare l'amicizia e la relazione intellettuale instauratasi tra María Zambrano e Cristina Campo durante la seconda metà degli anni Cinquanta a Roma, testimoniata dalle lettere scritte da Cristina Campo all'amica e pubblicate in Italia. La vicinanza del pensiero e del sentimento religioso che le caratterizza è senz'altro un motivo d'indagine. Questa importante corrispondenza è inoltre studiata in relazione alla filosofia di Simone Weil, figura mediatrice che unisce le due autrici.

  6. Las organizaciones intermedias en el campo de la responsabilidad social empresarial

    OpenAIRE

    Abelenda Casalet, Lucía

    2010-01-01

    Se presenta un estudio sobre un tipo particular de organizaciones de la sociedad civil, las organizaciones intermedias. Focalizamos el estudio en las organizaciones intermedias que se desempeñan en el campo de la Responsabilidad Social Empresarial. La investigación está orientada a la búsqueda de rasgos que puedan definir la acción de estas organizaciones y su capacidad de innovación social en un campo particular. En el desarrollo de la investigación se jerarquizó el nivel micro, relacionado ...

  7. River basin administration

    Science.gov (United States)

    Management of international rivers and their basins is the focus of the Centre for Comparative Studies on (International) River Basin Administration, recently established at Delft University of Technology in the Netherlands. Water pollution, sludge, and conflicting interests in the use of water in upstream and downstream parts of a river basin will be addressed by studying groundwater and consumption of water in the whole catchment area of a river.Important aspects of river management are administrative and policy aspects. The Centre will focus on policy, law, planning, and organization, including transboundary cooperation, posing standards, integrated environmental planning on regional scale and environmental impact assessments.

  8. Near-Inertial Surface Currents and their influence on Surface Dispersion in the Northeastern Gulf of Mexico near the Deepwater Horizon Oil Spill

    Science.gov (United States)

    Gough, M.; Reniers, A.; MacMahan, J. H.; Howden, S. D.

    2014-12-01

    The continental shelf along the northeastern Gulf of Mexico is transected by the critical latitude (30°N) for inertial motions. At this latitude the inertial period is 24 hours and diurnal surface current oscillations can amplify due to resonance with diurnal wind and tidal forcing. Tidal amplitudes are relatively small in this region although K1 tidal currents can be strong over the shelf west of the DeSoto Canyon where the K1 tide propagates onshore as a Sverdrup wave. Other sources of diurnal motions include internal tidal currents, Poincaré waves, and basin resonance. It is therefore very difficult to separate inertial wind-driven motions from other diurnal motions. Spatiotemporal surface currents were measured using hourly 6 km resolution HF radar data collected in June 2010 during the Deepwater Horizon oil spill and July 2012 during the Grand Lagrangian Deployment (GLAD). Surface currents were also measured using GLAD GPS-tracked drifters. NDBC buoy wind data were used to determine wind-forcing, and OSU Tidal Inversion Software (OTIS) were used to predict tidal currents. The relative spatiotemporal influence of diurnal wind and tidal forcing on diurnal surface current oscillations is determined through a series of comparative analyses: phase and amplitude of bandpassed timeseries, wavelet analyses, wind-driven inertial oscillation calculations, and tidal current predictions. The wind-driven inertial ocean response is calculated by applying a simple "slab" model where wind-forcing is allowed to excite a layer of low-density water riding over high density water. The spatial variance of diurnal motions are found to be correlated with satellite turbidity imagery indicating that stratification influences the sea surface inertial response to wind-forcing. Surface dispersion is found to be minimized in regions of high diurnal variance suggesting that mean surface transport is restricted in regions of inertial motions associated with stratification.

  9. Sustainable development of deep-water seaport: the case of Lithuania.

    Science.gov (United States)

    Burskyte, Vilma; Belous, Olga; Stasiskiene, Zaneta

    2011-06-01

    In 2003, the Japan International Cooperation Agency carried out a development feasibility study of Klaipeda Seaport (Lithuania). The focus in this study was the evaluation of environmental impacts of the port expansion because it is located in an ecologically sensitive area. While the Japanese researchers focused on the environmental impact analysis, they did not provide unambiguous conclusions. The problems remained unresolved and required further, more detailed consideration and deeper analysis. Environmental sustainability in seaports is an issue of timely importance in many countries given the rapid increase in port-to-port traffic and harbor capacity. This paper explores the situation in Klaipeda Seaport (Lithuania) which is the northernmost ice-free port on the Eastern coast of the Baltic Sea and its challenges in terms of environmental aspects and current pollution situation. This port plays an important role in the economic development of the region and in creating a sustainable society, i.e., a society that continues to develop economically without increasing its impact on our living environment and where the possible reduction of its current impact can be huge due to the fact that the seaport is a place where transport and logistics intersect and constitute large-scale industrial estates. Increasingly, they also turn towards sustainability. Society faces the need for radical change because of increasing technological progress and increasing environmental impact. Environmental and public issues must be addressed by a systemic approach to find harmony among all the subsystems. Therefore, the authors of the article performed an assessment of the deep-water port of Klaipeda sustainable development opportunities tackling the following tasks: (1) Assessing Klaipeda port and the projected deep-water port of the current environment state; (2) Assessing the impact of the water quality of Klaipeda port, depending on the intensity of activity; (3) Assessing the

  10. Deepwater fish assemblages at Isla del Coco National Park and Las Gemelas Seamount, Costa Rica

    Directory of Open Access Journals (Sweden)

    Richard M. Starr

    2012-11-01

    Full Text Available The deepwater faunas of oceanic islands and seamounts of the Eastern Tropical Pacific are poorly known. From 11-22 September 2009 we conducted an exploration of the deepwater areas of the Isla del Coco Marine Conservation Area, Costa Rica and a nearby seamount using a manned submersible. The goal of the exploration was to characterize the habitats and biota, and conduct quantitative surveys of the deepwater portions of Isla del Coco National Park and Las Gemelas Seamount, located about 50km southwest of Isla del Coco. We completed a total of 22 submersible dives, spanning more than 80hr underwater, and collected a total of 36hr of video. We surveyed habitats from 50-402m and observed more than 45 species of fishes, some of which have not yet been described and are likely new to science. The diversity of fish species in deep water at Isla del Coco National Park was lower than the diversity of fishes in shallow water, and eight species groups accounted for more than 95% of the total fish biomass. The combined density of all fish species was higher at Las Gemelas Seamount (253 fishes/100m² than at Isla del Coco National Park (138 fishes/100m². The combined density of fishes in habitats comprised primarily of bedrock or large boulders outcrops was more than three times as high at Las Gemelas Seamount as it was at Isla del Coco National Park. This discrepancy was caused by the extremely high concentration of Anthiinae fishes in rocky habitats at Las Gemelas Seamount. Densities of fishes in the other habitats were similar between the two sites. Similarly, when estimates of fish density were plotted by slope categories the density was much greater on steep slopes, which were usually comprised of rock habitats. Also, the density of fishes was greatest on high rugosity habitats. Results of these submersible surveys indicate that seamounts in the tropical eastern Pacific Ocean may be an important source of biodiversity and that more quantitative surveys

  11. Discussion on the exploration & development prospect of shale gas in the Sichuan Basin

    Directory of Open Access Journals (Sweden)

    Dazhong Dong

    2015-01-01

    Full Text Available The Sichuan Basin, a hotspot and one of the most successful areas for shale gas exploration and development, can largely reflect and have a big say in the future prospect of shale gas in China. Through an overall review on the progress in shale gas exploration and development in the Sichuan Basin, we obtained the following findings: (1 the Sichuan Basin has experienced the marine and terrestrial depositional evolution, resulting in the deposition of three types of organic-matter-rich shales (i.e. marine, transitional, and terrestrial, and the occurrence of six sets of favorable shale gas enrichment strata (i.e. the Sinian Doushantuo Fm, the Cambrian Qiongzhusi Fm, the Ordovician Wufeng–Silurian Longmaxi Fm, the Permian Longtan Fm, the Triassic Xujiahe Fm, and the Jurassic Zhiliujing Fm; (2 the five key elements for shale gas accumulation in the Wufeng-Longmaxi Fm are deep-water shelf facies, greater thickness of organic-rich shales, moderate thermal evolution, abundant structural fractures, reservoir overpressure; and (3 the exploration and development of shale gas in this basin still confronts two major challenges, namely, uncertain sweet spots and potential prospect of shale gas, and the immature technologies in the development of shale gas resources at a depth of more than 3500 m. In conclusion, shale gas has been discovered in the Jurassic, Triassic and Cambrian, and preliminary industrial-scale gas has been produced in the Ordovician-Silurian Fm in the Sichuan Basin, indicating a promising prospect there; commercial shale gas can be produced there with an estimated annual gas output of 30–60 billion m3; and shale gas exploration and production experiences in this basin will provide valuable theoretical and technical support for commercial shale gas development in China.

  12. Ground-water in the Teresina-Campo Maior area, Piaui, Brazil

    Science.gov (United States)

    Rodis, Harry G.; Suszczynski, Edison F.

    1972-01-01

    The Teresina-Campo Maior area lies in a presently developing farming and grazing region near the margin of drought-prone northeast Brazil where irrigated farming offers the best potential for economic development. The area comprises 9,700 square kilometers largely of catinga-covered tabular uplands which are drained by the perennial Rio Parnatba. The climate is hot and humid most of the year but with distinct wet and dry seasons. Temperature extremes range from 20?C to 39?C and the annum rainfall averages 1,200 millimeters. The area's ground-water reservoir is contained chiefly in sandstone aquifers of six westward-dipping sedimentary rock formations, all part of the Maranhao sedimentary basin. The youngest of these formations, namely the Piaut (Pennsylvarian), Poti (Mississippian), Longa (Upper Devonian), and Cabecas (Middle Devoniar), contain the principal aquifers. Precipitation is the primary source of recharge to these aquifers and is more than sufficient to replenish current withdrawals from wells. Underlying the principal aquifers are the untapped Pimenteiras and Serra Grande Formations (both Lower Devonian) which in areas adjacent to the report area are moderately good to excellent water producers. These aquifers are recharged principally by lateral inflow from the east. Water also occurs in the alluvial deposits (Quaternary) underlying the flood plain of the Rio Parnatba but recurrent and uncontrolled flooding at present (1966) precludes their development. Of little economic importance, because they lie above the zone of saturation, are the thin erosional remnants of the Pastos Bons (Upper Triassic), Matuca, and Pedra de Fogo (both Permian) Formations. There are in the report area about 200 drilled wells most of which are pumped with power-driven engines. The wells range from 40 to 500 meters deep but most do not exceed 150 meters, and practically all are completed open hole. Yields range from 500 liters per day for 6-inch-diameter domestic wells to 240

  13. AtlanticCanyons2011: Exploration and Research of Mid-Atlantic Deepwater hard Bottom Habitats and Shipwrecks with Emphasis on Canyons and Coral Communities between 20110604 and 20110617

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This is an interagency study that focuses on the exploration and investigation of deepwater hard bottom biological communities located in the northwest Atlantic...

  14. Deepwater Horizon - baseline fisheries surveys conducted in the Gulf of Mexico from 1987-04-16 to 2010-08-01 (NCEI Accession 0150631)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In 2010, the Deepwater Horizon oil spill occurred in the Gulf of Mexico and the Natural Resources Damage Assessment (NRDA) was initiated to determine the extent of...

  15. Historical oceanographic data and climatologies in support of the Deepwater Horizon oil spill event in the Gulf of Mexico (NODC Accession 0064867)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data products and in situ oceanographic data collected as part of the Deepwater Horizon Event in the Gulf of Mexico (May 2010). The climatological fields detailed...

  16. Watershed Planning Basins

    Data.gov (United States)

    Vermont Center for Geographic Information — The Watershed Planning Basin layer is part of a larger dataset contains administrative boundaries for Vermont's Agency of Natural Resources. The dataset includes...

  17. BASINS Framework and Features

    Science.gov (United States)

    BASINS enables users to efficiently access nationwide environmental databases and local user-specified datasets, apply assessment and planning tools, and run a variety of proven nonpoint loading and water quality models within a single GIS format.

  18. Tectonic-stratigraphic evolution of mini-basins and salt provinces of Espirito Santo Basin-Brazil; Analise da evolucao tectono sedimentar de mini-bacias e provincias de sal da Bacia do Espirito Santo

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira Neto, Walter Dias; Fernandes, Flavio Luis [Petroleum Geoscience Technology Ltda. (PGT), Rio de Janeiro, RJ (Brazil); Mohriak, Webster [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The Espirito Santo Basin integrates the group of basins along the eastern Brazilian continental margin. It is located between 18 deg and 21 deg S, encompassing an area of approximately 220,000 km{sup 2}, onshore and offshore the Espirito Santo State. Its geological limit with the Campos Basin to the south is defined by a Precambrian basement high (Vitoria Arch), and its northern limit with the Mucuri Basin is defined by a geopolitical limit. The study of salt tectonics processes in the Espirito Santo Basin allowed the deformational analysis and interpretation of the chronological evolution of the mini-basins developed between salt diapirs. We observe an intrinsic relationship between halokinesis and creation of subsidence troughs that may be important for trapping hydrocarbon reservoirs, and consequently form oil and gas accumulations in this portion of the basin. This geodynamics evolution of these structures is marked by a strong linkage between salt movement and coeval sedimentation in the interdomal basins, forming structures and stratigraphic traps that may constitute important aspects for the petroleum geology. (author)

  19. K Basin Hazard Analysis

    International Nuclear Information System (INIS)

    PECH, S.H.

    2000-01-01

    This report describes the methodology used in conducting the K Basins Hazard Analysis, which provides the foundation for the K Basins Final Safety Analysis Report. This hazard analysis was performed in accordance with guidance provided by DOE-STD-3009-94, Preparation Guide for U. S. Department of Energy Nonreactor Nuclear Facility Safety Analysis Reports and implements the requirements of DOE Order 5480.23, Nuclear Safety Analysis Report

  20. K Basin Hazard Analysis

    Energy Technology Data Exchange (ETDEWEB)

    PECH, S.H.

    2000-08-23

    This report describes the methodology used in conducting the K Basins Hazard Analysis, which provides the foundation for the K Basins Final Safety Analysis Report. This hazard analysis was performed in accordance with guidance provided by DOE-STD-3009-94, Preparation Guide for U. S. Department of Energy Nonreactor Nuclear Facility Safety Analysis Reports and implements the requirements of DOE Order 5480.23, Nuclear Safety Analysis Report.

  1. K Basins Hazard Analysis

    International Nuclear Information System (INIS)

    WEBB, R.H.

    1999-01-01

    This report describes the methodology used in conducting the K Basins Hazard Analysis, which provides the foundation for the K Basins Safety Analysis Report (HNF-SD-WM-SAR-062/Rev.4). This hazard analysis was performed in accordance with guidance provided by DOE-STD-3009-94, Preparation Guide for U. S. Department of Energy Nonreactor Nuclear Facility Safety Analysis Reports and implements the requirements of DOE Order 5480.23, Nuclear Safety Analysis Report

  2. Alternative response technology program for the Deepwater Horizon in the Gulf of Mexico - an overview

    International Nuclear Information System (INIS)

    Cortez, Michael J.; Rowe, Hunter G.

    2011-01-01

    The innovative approach utilized by the Alternative Response Technology (ART) Program for the MC252 Deepwater Horizon response in the Gulf of Mexico during 2010 was presented in this paper. The ART program is authorized by the Unified Area Command. This paper focuses on the spill response technologies that were implemented offshore, near shore and on-shore, and covers technologies related to booming, skimming, separation, sand cleaning, surveillance and detection. A process was designed and implemented for capturing ideas real time, which leveraged the public's ingenuity and entrepreneurial spirit. About 120,000 individual ideas were submitted by the public globally from more than 100 countries. About 40,000 of these ideas were related to addressing the spill response. There are about 100 new technologies related to spill response that were formally evaluated and/or field tested, and approximately 25 of those tested were successfully implemented across the spill response area.

  3. Alternative response technology program for the Deepwater Horizon in the Gulf of Mexico - an overview

    Energy Technology Data Exchange (ETDEWEB)

    Cortez, Michael J.; Rowe, Hunter G. [BP - Gulf Coast Restoration (United States)], email: michael.cortez@bp.com

    2011-07-01

    The innovative approach utilized by the Alternative Response Technology (ART) Program for the MC252 Deepwater Horizon response in the Gulf of Mexico during 2010 was presented in this paper. The ART program is authorized by the Unified Area Command. This paper focuses on the spill response technologies that were implemented offshore, near shore and on-shore, and covers technologies related to booming, skimming, separation, sand cleaning, surveillance and detection. A process was designed and implemented for capturing ideas real time, which leveraged the public's ingenuity and entrepreneurial spirit. About 120,000 individual ideas were submitted by the public globally from more than 100 countries. About 40,000 of these ideas were related to addressing the spill response. There are about 100 new technologies related to spill response that were formally evaluated and/or field tested, and approximately 25 of those tested were successfully implemented across the spill response area.

  4. Securing classification and regulatory approval for deepwater projects: management challenges in a global environment

    Energy Technology Data Exchange (ETDEWEB)

    Feijo, Luiz P.; Burton, Gareth C. [American Bureau of Shipping (ABS), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    As the offshore industry continues to develop and move into increasingly deeper waters, technological boundaries are being pushed to new limits. Along with these advances, the design, fabrication and installation of deepwater oil and gas projects has become an increasingly global endeavor. After providing an overview of the history and role of Classification Societies, this paper reviews the challenges of securing classification and regulatory approval in a global environment. Operational, procedural and technological changes which one Classification Society; the American Bureau of Shipping, known as ABS, has implemented to address these challenges are presented. The result of the changes has been a more customized service aiming at faster and more streamlined classification approval process. (author)

  5. Applications of science and engineering to quantify and control the Deepwater Horizon oil spill

    Science.gov (United States)

    McNutt, Marcia K.; Chu, Steven; Lubchenco, Jane; Hunter, Tom; Dreyfus, Gabrielle; Murawski, Steven A.; Kennedy, David M.

    2012-01-01

    The unprecedented engagement of scientists from government, academia, and industry enabled multiple unanticipated and unique problems to be addressed during the Deepwater Horizon oil spill. During the months between the initial blowout on April 20, 2010, and the final well kill on September 19, 2010, researchers prepared options, analyses of tradeoffs, assessments, and calculations of uncertainties associated with the flow rate of the well, well shut in, killing the well, and determination of the location of oil released into the environment. This information was used in near real time by the National Incident Commander and other government decision-makers. It increased transparency into BP’s proposed actions and gave the government confidence that, at each stage proposed, courses of action had been thoroughly vetted to reduce risk to human life and the environment and improve chances of success.

  6. A prediction method of natural gas hydrate formation in deepwater gas well and its application

    Directory of Open Access Journals (Sweden)

    Yanli Guo

    2016-09-01

    Full Text Available To prevent the deposition of natural gas hydrate in deepwater gas well, the hydrate formation area in wellbore must be predicted. Herein, by comparing four prediction methods of temperature in pipe with field data and comparing five prediction methods of hydrate formation with experiment data, a method based on OLGA & PVTsim for predicting the hydrate formation area in wellbore was proposed. Meanwhile, The hydrate formation under the conditions of steady production, throttling and shut-in was predicted by using this method based on a well data in the South China Sea. The results indicate that the hydrate formation area decreases with the increase of gas production, inhibitor concentrations and the thickness of insulation materials and increases with the increase of thermal conductivity of insulation materials and shutdown time. Throttling effect causes a plunge in temperature and pressure in wellbore, thus leading to an increase of hydrate formation area.

  7. Application of MODFLOW for oil reservoir simulation during the Deepwater Horizon Crisis

    Science.gov (United States)

    Hsieh, Paul A.

    2011-01-01

    When the Macondo well was shut in on July 15, 2010, the shut-in pressure recovered to a level that indicated the possibility of oil leakage out of the well casing into the surrounding formation. Such a leak could initiate a hydraulic fracture that might eventually breach the seafloor, resulting in renewed and uncontrolled oil flow into the Gulf of Mexico. To help evaluate whether or not to reopen the well, a MODFLOW model was constructed within 24 h after shut in to analyze the shut-in pressure. The model showed that the shut-in pressure can be explained by a reasonable scenario in which the well did not leak after shut in. The rapid response provided a scientific analysis for the decision to keep the well shut, thus ending the oil spill resulting from the Deepwater Horizon blow out.

  8. Reduction of deepwater formation in the Greenland Sea during the 1980s: Evidence from tracer data

    International Nuclear Information System (INIS)

    Schlosser, P.; Boenisch, G.; Bayer, R.; Rhein, M.

    1991-01-01

    Hydrographic observations and measurements of the concentrations of chlorofluorocarbons (CFCs) have suggested that the formation of Greenland Sea Deep Water (GSDW) slowed down considerably during the 1980s. Such a decrease is related to weakened convection in the Greenland Sea and thus could have significant impact on the properties of the waters flowing over the Scotland-Iceland-Greenlad ridge system into the deep Atlantic. Study of the variability of GSDW formation is relevant for understanding the impact of the circulation in the European Polar seas on regional and global deep water characteristics. New long-term multitracer observations from the Greenland Sea show that GSDW formation indeed was greatly reduced during the 1980s. A box model of deepwater formation and exchange in the European Polar seas tuned by the tracer data indicates that the reduction rate of GSDW formation was about 80% and that the start date of the reduction was between 1978 and 1982. 24 refs., 4 figs

  9. Methane flux to the atmosphere from the Deepwater Horizon oil disaster

    Science.gov (United States)

    Yvon-Lewis, Shari A.; Hu, Lei; Kessler, John

    2011-01-01

    The sea-to-air flux of methane from the blowout at the Deepwater Horizon was measured with substantial spatial and temporal resolution over the course of seven days in June 2010. Air and water concentrations were analyzed continuously from a flowing air line and a continuously flowing seawater equilibrator using cavity ring-down spectrometers (CRDS) and a gas chromatograph with a flame ionization detector (GC-FID). The results indicate a low flux of methane to the atmosphere (0.024 μmol m-2 d-1) with atmospheric and seawater equilibrium mixing ratios averaging 1.86 ppm and 2.85 ppm, respectively within the survey area. The oil leak, which was estimated to contain 30.2% methane by weight, was not a significant source of methane to the atmosphere during this study. Most of the methane emitted from the wellhead was dissolved in the deep ocean.

  10. Tulongicin, an Antibacterial Tri-Indole Alkaloid from a Deep-Water Topsentia sp. Sponge.

    Science.gov (United States)

    Liu, Hong-Bing; Lauro, Gianluigi; O'Connor, Robert D; Lohith, Katheryn; Kelly, Michelle; Colin, Patrick; Bifulco, Giuseppe; Bewley, Carole A

    2017-09-22

    Antibacterial-guided fractionation of an extract of a deep-water Topsentia sp. marine sponge led to the isolation of two new indole alkaloids, tulongicin A (1) and dihydrospongotine C (2), along with two known analogues, spongotine C (3) and dibromodeoxytopsentin (4). Their planar structures were determined by NMR spectroscopy. Their absolute configurations were determined through a combination of experimental and computational analyses. Tulongicin (1) is the first natural product to contain a di(6-Br-1H-indol-3-yl)methyl group linked to an imidazole core. The coexistence of tri-indole 1 and bis-indole alcohol 2 suggests a possible route to 1. All of the compounds showed strong antimicrobial activity against Staphylococcus aureus.

  11. Neopetrosiquinones A and B, sesquiterpene benzoquinones isolated from the deep-water sponge Neopetrosia cf. proxima.

    Science.gov (United States)

    Winder, Priscilla L; Baker, Heather L; Linley, Patricia; Guzmán, Esther A; Pomponi, Shirley A; Diaz, M Cristina; Reed, John K; Wright, Amy E

    2011-11-15

    Two new marine-derived sesquiterpene benzoquinones which we designate as neopetrosiquinones A (1) and B (2), have been isolated from a deep-water sponge of the family Petrosiidae. The structures were elucidated on the basis of their spectroscopic data. Compounds 1 and 2 inhibit the in vitro proliferation of the DLD-1 human colorectal adenocarcinoma cell line with IC(50) values of 3.7 and 9.8 μM, respectively, and the PANC-1 human pancreatic carcinoma cell line with IC(50) values of 6.1 and 13.8 μM, respectively. Neopetrosiquinone A (1) also inhibited the in vitro proliferation of the AsPC-1 human pancreatic carcinoma cell line with an IC(50) value of 6.1 μM. The compounds are structurally related to alisiaquinone A, cyclozonarone, and xestoquinone. Copyright © 2011 Elsevier Ltd. All rights reserved.

  12. Cytotoxic macrolides from a new species of the deep-water marine sponge Leiodermatium.

    Science.gov (United States)

    Sandler, Joel S; Colin, Patrick L; Kelly, Michelle; Fenical, William

    2006-09-15

    Chemical investigation of a new species of the deep-water marine sponge Leiodermatium, collected by manned submersible at a depth of 740 feet in Palau, resulted in the isolation of two cytotoxic macrolides, leiodolides A (1) and B (2). The leiodolides represent the first members of a new class of 19-membered ring macrolides, incorporating several unique functional groups including a conjugated oxazole ring, a bromine substituent, and an alpha-hydroxy-alpha-methyl carboxylic acid side-chain terminus. The structures of these new metabolites were established by spectroscopic analysis, chemical modification, and degradation. The relative and absolute stereochemistries at most chiral centers were assigned on detailed interpretation of spectroscopic data, coupled with chemical degradation and application of the modified Mosher ester method. Leiodolide A showed significant cytotoxicity (average GI(50) = 2.0 microM) in the National Cancer Institute's 60 cell line panel with enhanced activity against HL-60 leukemia and OVCAR-3 ovarian cancer cell lines.

  13. NOAA Response to the Deepwater Horizon Oil Spill - Protecting Oceans, Coasts and Fisheries (Invited)

    Science.gov (United States)

    Lubchenco, J.

    2010-12-01

    As the nation’s leading scientific resource for oil spills, NOAA has been on the scene of the Deepwater Horizon/BP oil spill from the start, providing coordinated scientific weather and biological response services to federal, state and local organizations. NOAA has mobilized experts from across the agency to help contain the spreading oil spill and protect the Gulf of Mexico’s many marine mammals, sea turtles, fish, shellfish and other endangered marine life. NOAA spill specialists advised the U.S. Coast Guard on cleanup options as well as advising all affected federal, state and local partners on sensitive marine resources at risk in this area of the Gulf of Mexico. As a major partner in the federal response to this incident, NOAA provided the necessary coastal and marine expertise required for sound, timely decision-making and helped protect the affected Gulf Coast communities and coastal marine environment and will continue to do so for ongoing restoration efforts.

  14. Composite risers for deep-water offshore technology: Problems and prospects. 1. Metal-composite riser

    Science.gov (United States)

    Beyle, A. I.; Gustafson, C. G.; Kulakov, V. L.; Tarnopol'skii, Yu. M.

    1997-09-01

    Prospects for the application of advanced composites in the offshore technology of oil production are considered. The use of composites in vertical pipelines-risers seems to be the most efficient. The operating loads are studied and the attendant problems are formulated. A comparative analysis of the characteristics of metal, composite, and metal-composite deep-water risers is presented. A technique is developed for designing multilayered risers, taking into account the action of internal and external pressures, gravity, and the axial tensile force created by tensioners, as well as the residual technological stresses due to the difference in coefficients of thermal expansion, physical-chemical shrinkage, and force winding. Numerical estimations are given for a two-layered riser with an inner metal layer of steel, titanium, or aluminum alloys and a composite layer of glass- or carbon-fiber plastics formed by circumferential winding. It is shown that the technological stresses substantially affect the characteristics of the riser.

  15. Microbial gene functions enriched in the Deepwater Horizon deep-sea oil plume

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Z.; Deng, Y.; Nostrand, J.D. Van; He, Z.; Voordeckers, J.; Zhou, A.; Lee, Y.-J.; Mason, O.U.; Dubinsky, E.; Chavarria, K.; Tom, L.; Fortney, J.; Lamendella, R.; Jansson, J.K.; D?haeseleer, P.; Hazen, T.C.; Zhou, J.

    2011-06-15

    The Deepwater Horizon oil spill in the Gulf of Mexico is the deepest and largest offshore spill in U.S. history and its impacts on marine ecosystems are largely unknown. Here, we showed that the microbial community functional composition and structure were dramatically altered in a deep-sea oil plume resulting from the spill. A variety of metabolic genes involved in both aerobic and anaerobic hydrocarbon degradation were highly enriched in the plume compared to outside the plume, indicating a great potential for intrinsic bioremediation or natural attenuation in the deep-sea. Various other microbial functional genes relevant to carbon, nitrogen, phosphorus, sulfur and iron cycling, metal resistance, and bacteriophage replication were also enriched in the plume. Together, these results suggest that the indigenous marine microbial communities could play a significant role in biodegradation of oil spills in deep-sea environments.

  16. Potential impacts of the Deepwater Horizon oil spill on large pelagic fishes

    Science.gov (United States)

    Frias-Torres, Sarrah; Bostater, Charles R., Jr.

    2011-11-01

    Biogeographical analyses provide insights on how the Deepwater Horizon oil spill impacted large pelagic fishes. We georeferenced historical ichthyoplankton surveys and published literature to map the spawning and larval areas of bluefin tuna, swordfish, blue marlin and whale shark sightings in the Gulf of Mexico with daily satellite-derived images detecting surface oil. The oil spill covered critical areas used by large pelagic fishes. Surface oil was detected in 100% of the northernmost whale shark sightings, in 32.8 % of the bluefin tuna spawning area and 38 % of the blue marlin larval area. No surface oil was detected in the swordfish spawning and larval area. Our study likely underestimates the extend of the oil spill due to satellite sensors detecting only the upper euphotic zone and the use of dispersants altering crude oil density, but provides a previously unknown spatio-temporal analysis.

  17. Deepwater royalty relief product of 3 1/2 year U.S. political effort

    International Nuclear Information System (INIS)

    Davis, R.E.; Neff, S.

    1996-01-01

    Against the backdrop of more than 20 years of increasingly stringent environmental regulation, ever-expanding exploration and development moratoria on the Outer Continental Shelf (OCS), and reductions in producer tax incentives, oil and natural gas exploration companies active in deep waters of the Gulf of Mexico recently won a significant legislative victory. On Nov. 28, 1995, President Clinton signed into law S.395, the Alaska Power Administration Sale Act. Title 3 of S.395 embodies the Outer Continental Shelf Deep Water Royalty Relief Act. This landmark legislation provides substantial incentives for oil and natural gas production in the gulf of Mexico by temporarily eliminating royalties on certain deepwater leases. It is the first direct incentive for oil and gas production enacted at the federal level in many years. This paper reviews the elements used to arrive at this successful legislation including the congressional leadership. It describes debates, cabinet level discussions, and use of parlimentary procedures

  18. Oil Characterization and Distribution in Florida Estuary Sediments Following the Deepwater Horizon Spill

    Directory of Open Access Journals (Sweden)

    Mace G. Barron

    2015-09-01

    Full Text Available Barrier islands of Northwest Florida were heavily oiled during the Deepwater Horizon spill, but less is known about the impacts to the shorelines of the associated estuaries. Shoreline sediment oiling was investigated at 18 sites within the Pensacola Bay, Florida system prior to impact, during peak oiling, and post-wellhead capping. Only two locations closest to the Gulf of Mexico had elevated levels of total petroleum hydrocarbons (TPH and total polycyclic aromatic hydrocarbons (PAHs. These samples showed a clear weathered crude oil signature, pattern of depletion of C9 to C19 alkanes and C0 to C4 naphthalenes, and geochemical biomarker ratios in concordance with weathered Macondo crude oil. All other locations and sample times showed only trace petroleum contamination. The results of this study are consistent with available satellite imagery and visual shoreline survey data showing heavy shoreline oiling limited to sandy beaches near the entrance to Pensacola Bay and shorelines of Santa Rosa Island.

  19. Environmental DNA from seawater samples correlate with trawl catches of Subarctic, deepwater fishes

    DEFF Research Database (Denmark)

    Thomsen, Philip Francis; Møller, Peter Rask; Sigsgaard, Eva Egelyng

    2016-01-01

    depths in Southwest Greenland. We collected seawater samples at depths of 188-918 m and compared seawater eDNA to catch data from trawling. We used Illumina sequencing of PCR products to demonstrate that eDNA reads show equivalence to fishing catch data obtained from trawling. Twenty-six families were......Remote polar and deepwater fish faunas are under pressure from ongoing climate change and increasing fishing effort. However, these fish communities are difficult to monitor for logistic and financial reasons. Currently, monitoring of marine fishes largely relies on invasive techniques...... such as bottom trawling, and on official reporting of global catches, which can be unreliable. Thus, there is need for alternative and non-invasive techniques for qualitative and quantitative oceanic fish surveys. Here we report environmental DNA (eDNA) metabarcoding of seawater samples from continental slope...

  20. Thermodynamic characterization of deepwater natural gas mixtures with heavy hydrocarbon content at high pressures

    International Nuclear Information System (INIS)

    Atilhan, Mert; Aparicio, Santiago; Ejaz, Saquib; Zhou, Jingjun; Al-Marri, Mohammed; Holste, James J.; Hall, Kenneth R.

    2015-01-01

    This paper includes high-accuracy density measurements and phase envelopes for deepwater natural gas mixtures. Mixtures primarily consist of (0.88 and 0.94) mole fraction methane and both mixtures includes heavy components (C 6+ ) more than 0.002 mole fraction. Experimental density and phase envelope data for deep and ultra-deep reservoir mixtures are scarce in literature and high accuracy measurements for such parameters for such natural gas-like mixtures are essential to validate the benchmark equations for custody transfer such as AGA8-DC92 and GERG-2008 equation of states (EOS). Thus, in this paper we report density and phase envelope experimental data via compact single-sinker magnetic suspension densimeter and isochoric apparatuses. Such data help gas industry to avoid retrograde condensation in natural gas pipelines

  1. Acquisition of airborne imagery in support of Deepwater Horizon oil spill recovery assessments

    Science.gov (United States)

    Bostater, Charles R., Jr.; Muller-Karger, Frank E.

    2012-09-01

    Remote sensing imagery was collected from a low flying aircraft along the near coastal waters of the Florida Panhandle and northern Gulf of Mexico and into Barataria Bay, Louisiana, USA, during March 2011. Imagery was acquired from an aircraft that simultaneously collected traditional photogrammetric film imagery, digital video, digital still images, and digital hyperspectral imagery. The original purpose of the project was to collect airborne imagery to support assessment of weathered oil in littoral areas influenced by the Deepwater Horizon oil and gas spill that occurred during the spring and summer of 2010. This paper describes the data acquired and presents information that demonstrates the utility of small spatial scale imagery to detect the presence of weathered oil along littoral areas in the northern Gulf of Mexico. Flight tracks and examples of imagery collected are presented and methods used to plan and acquire the imagery are described. Results suggest weathered oil in littoral areas after the spill was contained at the source.

  2. The U.S. Coast Guard’s Deepwater Force Modernization Plan: Can It Be Accelerated? Will It Meet Changing Security Needs?

    Science.gov (United States)

    2004-01-01

    Vehicle WAGB Ice Breaker WHEC High Endurance Cutter (also HEC) WIX Training Cutter WLB Seagoing Buoy Tender WLI Inland Buoy Tender WLIC Inland Construction...Foreign vessel inspections • Living marine resources protection • Marine and environmental science. The USCG website includes web pages for each mission...pp. 6–8 (available on the Web at http://www.uscg.mil/deepwater/. Mission Need. Most USCG Deepwater missions can be broken down into the functional

  3. Numerical analysis of wellbore instability in gas hydrate formation during deep-water drilling

    Science.gov (United States)

    Zhang, Huaiwen; Cheng, Yuanfang; Li, Qingchao; Yan, Chuanliang; Han, Xiuting

    2018-02-01

    Gas hydrate formation may be encountered during deep-water drilling because of the large amount and wide distribution of gas hydrates under the shallow seabed of the South China Sea. Hydrates are extremely sensitive to temperature and pressure changes, and drilling through gas hydrate formation may cause dissociation of hydrates, accompanied by changes in wellbore temperatures, pore pressures, and stress states, thereby leading to wellbore plastic yield and wellbore instability. Considering the coupling effect of seepage of drilling fluid into gas hydrate formation, heat conduction between drilling fluid and formation, hydrate dissociation, and transformation of the formation framework, this study established a multi-field coupling mathematical model of the wellbore in the hydrate formation. Furthermore, the influences of drilling fluid temperatures, densities, and soaking time on the instability of hydrate formation were calculated and analyzed. Results show that the greater the temperature difference between the drilling fluid and hydrate formation is, the faster the hydrate dissociates, the wider the plastic dissociation range is, and the greater the failure width becomes. When the temperature difference is greater than 7°C, the maximum rate of plastic deformation around the wellbore is more than 10%, which is along the direction of the minimum horizontal in-situ stress and associated with instability and damage on the surrounding rock. The hydrate dissociation is insensitive to the variation of drilling fluid density, thereby implying that the change of the density of drilling fluids has a minimal effect on the hydrate dissociation. Drilling fluids that are absorbed into the hydrate formation result in fast dissociation at the initial stage. As time elapses, the hydrate dissociation slows down, but the risk of wellbore instability is aggravated due to the prolonged submersion in drilling fluids. For the sake of the stability of the wellbore in deep-water

  4. Toxicity of weathered Deepwater Horizon oil to bay anchovy (Anchoa mitchilli) embryos.

    Science.gov (United States)

    O'Shaughnessy, Kathryn A; Forth, Heather; Takeshita, Ryan; Chesney, Edward J

    2018-02-01

    The BP-contracted Deepwater Horizon Macondo well blowout occurred on 20 April 2010 and lasted nearly three months. The well released millions of barrels of crude oil into the northern Gulf of Mexico, causing extensive impacts on pelagic, benthic, and estuarine fish species. The bay anchovy (Anchoa mitchilli) is an important zooplanktivore in the Gulf, serving as an ecological link between lower trophic levels and pelagic predatory fish species. Bay anchovy spawn from May through November in shallow inshore and estuarine waters throughout the Gulf. Because their buoyant embryos are a dominant part of the inshore ichthyoplankton throughout the summer, it is likely bay anchovy embryos encountered oil in coastal estuaries during the summer and fall of 2010. Bay anchovy embryos were exposed to a range of concentrations of two field-collected Deepwater Horizon oils as high-energy and low-energy water accommodated fractions (HEWAFs and LEWAFs, respectively) for 48h. The median lethal concentrations (LC 50 ) were lower in exposures with the more weathered oil (HEWAF, 1.48µg/L TPAH50; LEWAF, 1.58µg/L TPAH50) compared to the less weathered oil (HEWAF, 3.87µg/L TPAH50; LEWAF, 4.28µg/L TPAH50). To measure delayed mortality and life stage sensitivity between embryos and larvae, an additional 24h acute HEWAF exposure using the more weathered oil was run followed by a 24h grow-out period. Here the LC 50 was 9.71µg/L TPAH50 after the grow-out phase, suggesting a toxic effect of oil at the embryonic or hatching stage. We also found that exposures prepared with the more weathered Slick B oil produced lower LC 50 values compared to the exposures prepared with Slick A oil. Our results demonstrate that even relatively acute environmental exposure times can have a detrimental effect on bay anchovy embryos. Copyright © 2017 Elsevier Inc. All rights reserved.

  5. The Deepwater Horizon Oil Spill: Ecogenomics of the Deep-Sea Plume

    Science.gov (United States)

    Hazen, T. C.

    2012-12-01

    The explosion on April 20, 2010 at the BP-leased Deepwater Horizon drilling rig in the Gulf of Mexico off the coast of Louisiana, resulted in oil and gas rising to the surface and the oil coming ashore in many parts of the Gulf, it also resulted in the dispersment of an immense oil plume 4,000 feet below the surface of the water. Despite spanning more than 600 feet in the water column and extending more than 10 miles from the wellhead, the dispersed oil plume was gone within weeks after the wellhead was capped - degraded and diluted to undetectable levels. Furthermore, this degradation took place without significant oxygen depletion. Ecogenomics enabled discovery of new and unclassified species of oil-eating bacteria that apparently lives in the deep Gulf where oil seeps are common. Using 16s microarrays, functional gene arrays, clone libraries, lipid analysis and a variety of hydrocarbon and micronutrient analyses we were able to characterize the oil degraders. Metagenomic sequence data was obtained for the deep-water samples using the Illumina platform. In addition, single cells were sorted and sequenced for the some of the most dominant bacteria that were represented in the oil plume; namely uncultivated representatives of Colwellia and Oceanospirillum. In addition, we performed laboratory microcosm experiments using uncontaminated water collected from The Gulf at the depth of the oil plume to which we added oil and COREXIT. These samples were characterized by 454 pyrotag. The results provide information about the key players and processes involved in degradation of oil, with and without COREXIT, in different impacted environments in The Gulf of Mexico. We are also extending these studies to explore dozens of deep sediment samples that were also collected after the oil spill around the wellhead. This data suggests that a great potential for intrinsic bioremediation of oil plumes exists in the deep-sea and other environs in the Gulf of Mexico.

  6. Diverse, rare microbial taxa responded to the Deepwater Horizon deep-sea hydrocarbon plume.

    Science.gov (United States)

    Kleindienst, Sara; Grim, Sharon; Sogin, Mitchell; Bracco, Annalisa; Crespo-Medina, Melitza; Joye, Samantha B

    2016-02-01

    The Deepwater Horizon (DWH) oil well blowout generated an enormous plume of dispersed hydrocarbons that substantially altered the Gulf of Mexico's deep-sea microbial community. A significant enrichment of distinct microbial populations was observed, yet, little is known about the abundance and richness of specific microbial ecotypes involved in gas, oil and dispersant biodegradation in the wake of oil spills. Here, we document a previously unrecognized diversity of closely related taxa affiliating with Cycloclasticus, Colwellia and Oceanospirillaceae and describe their spatio-temporal distribution in the Gulf's deepwater, in close proximity to the discharge site and at increasing distance from it, before, during and after the discharge. A highly sensitive, computational method (oligotyping) applied to a data set generated from 454-tag pyrosequencing of bacterial 16S ribosomal RNA gene V4-V6 regions, enabled the detection of population dynamics at the sub-operational taxonomic unit level (0.2% sequence similarity). The biogeochemical signature of the deep-sea samples was assessed via total cell counts, concentrations of short-chain alkanes (C1-C5), nutrients, (colored) dissolved organic and inorganic carbon, as well as methane oxidation rates. Statistical analysis elucidated environmental factors that shaped ecologically relevant dynamics of oligotypes, which likely represent distinct ecotypes. Major hydrocarbon degraders, adapted to the slow-diffusive natural hydrocarbon seepage in the Gulf of Mexico, appeared unable to cope with the conditions encountered during the DWH spill or were outcompeted. In contrast, diverse, rare taxa increased rapidly in abundance, underscoring the importance of specialized sub-populations and potential ecotypes during massive deep-sea oil discharges and perhaps other large-scale perturbations.

  7. Guía para la construcción de instalaciones deportivas: campo de tiro

    OpenAIRE

    Bañuls García, Felipe

    2017-01-01

    Realización de proyectos de campos de tiro de pistola y escopeta tanto de aire comprimido como de fuego, arco, ballesta, tiro al plato y pista de air-soft. Escuela de Arquitectura e Ingeniería de Edificación Universidad Politécnica de Cartagena

  8. A grande fuga: como um campo sobreviveu a tempos difíceis

    Directory of Open Access Journals (Sweden)

    Leon Fink

    2012-12-01

    Full Text Available O artigo apresenta um balanço da historiografia norte-americana sobre trabalhadores. Após detectar momentos de crise dentro desse campo de pesquisa, aponta os caminhos de recuperação e vitalidade, com novas temáticas e abordagens.

  9. LINEAMIENTOS PARA LA CONSTRUCCION DEL CAMPO CONTABLE:UN ENFOQUE SOCIAL - HISTORICO

    OpenAIRE

    SUAREZ PINEDA, JESUS ALBERTO

    2010-01-01

    Se propone una definicion del campo contable,es pertinente en dos sentidos:en el sentido de la exposicion de las relaciones Social-Historica que subyacen a sus representaciones y dinamicas actuales de uso,y en cuanto horizonte y guia para la construcion del curriculo y la generacion de lineas y de grupos de investigacion en la universidad.

  10. Bit keskus. (Uuendusliku Tehnoloogia Keskus) Inca, Mallorca, Hispaania / Alberto Campo Baeza

    Index Scriptorium Estoniae

    Campo Baeza, Alberto

    1998-01-01

    High-tech büroo kolmnurksel krundil industriaalpargis. Krundi sisemuses suletud alal "salaaed" apelsinipuudega. Seintel ronivad aromaatse lõhnaga taimed: jasmiinid, vistaaria, viinapuud. Konkurss 1995, ehitus 1997-1998. Arhitekt Alberto Campo Baeza (koos: L. Ignacio Aguirre Lopez, Anton Garcia Abril, Antonio Perez Villegas)

  11. 75 FR 8986 - Draft Supplemental Environmental Impact Statement for the Proposed Campo Regional Landfill...

    Science.gov (United States)

    2010-02-26

    ... Indian Reservation for the purpose of constructing and operating a solid waste landfill, recycling..., (916) 978-6051. SUPPLEMENTARY INFORMATION: The purpose of the proposed action is to address the socio... Campo Indian Reservation to be used for the purpose of constructing and operating a solid waste disposal...

  12. O surgimento do campo da atividade física para idosos no Brasil

    Directory of Open Access Journals (Sweden)

    Silvio de Cassio Costa Telles

    2015-06-01

    Full Text Available É comum hoje em dia a inserção do idoso brasileiro no rol da prática de atividades físicas. No entanto, até o segundo quartel do século XX, acreditava-se que a prática de atividade física sistemática poderia ser nociva ou mesmo antecipar a morte. Este estudo busca analisar e descrever como surgiu o campo da atividade física para idosos no Brasil. Metodologicamente utilizamos uma pesquisa bibliográfica aliada à Teoria do Campo do sociólogo Pierre Bourdieu (1983, que possibilitou a analogia entre o campo internacional do idoso, que se mostrou precursor, e o campo nacional. Tal relação desenvolveu um novo habitus, que transformou o medo em confiança, a dúvida em certeza, o sedentarismo em dinamismo, a eminência da morte em ampliação da vida, culminando no arquétipo dos “novos velhos” brasileiros.

  13. Land use change and ecosystem service provision in Pampas and Campos grasslands of southern South America

    NARCIS (Netherlands)

    Modernel Hristoff, Pablo; Rossing, W.A.H.; Corbeels, M.; Dogliotti, S.; Picasso, V.; Tittonell, P.

    2016-01-01

    New livestock production models need to simultaneously meet the increasing global demand for meat and preserve biodiversity and ecosystem services. Since the 16th century beef cattle has been produced on the Pampas and Campos native grasslands in southern South America, with only small amounts of

  14. 78 FR 34373 - Campo Verde Solar, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes...

    Science.gov (United States)

    2013-06-07

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ER13-1541-000] Campo Verde Solar, LLC; Supplemental Notice That Initial Market- Based Rate Filing Includes Request for Blanket Section 204 Authorization This is a supplemental notice in the above-referenced proceeding of Campo Verde...

  15. Palaeoenvironments in the Skagerrak-Kattegat basin in the eastern North Sea during the last deglaciation

    DEFF Research Database (Denmark)

    Knudsen, K.L.; Conradsen, Keld; Heier-Nielsen, S.

    1996-01-01

    The study of a c. 18 m thick Late Weichseltan - Early Holocene (isotope stage 2/1) marine succession (original water depth 100-150 m) from the Skagen 3 borehole, northern Denmark, has led to a better understanding of the palaeoenvironmental changes during the last deglaciation. The palaeoenvironm......The study of a c. 18 m thick Late Weichseltan - Early Holocene (isotope stage 2/1) marine succession (original water depth 100-150 m) from the Skagen 3 borehole, northern Denmark, has led to a better understanding of the palaeoenvironmental changes during the last deglaciation......-Holocene transition after the Younger Dryas occurred in two stages. Arctic/subarctic deep-water assemblages persisted continuously at Skagen after the first stage at 10 100 BP, while cold boreal assemblages existed in shallower water environments in the Kattegat-Skagerrak basin during the same period of time...

  16. Seismogenic rotational slumps and translational glides in pelagic deep-water carbonates. Upper Tithonian-Berriasian of Southern Tethyan margin (W Sicily, Italy)

    Science.gov (United States)

    Basilone, Luca

    2017-07-01

    Soft-sediment deformation structures (SSDSs), which reflect sediment mobilization processes, are helpful to identify punctual events of paleoenvironmental stresses. In the upper Tithonian-Berriasian calpionellid pelagic limestone of the Lattimusa Fm. outcropping in the Barracù section (W Sicily), paleoenvironmental restoration reveals the occurrence of a deep-water flat basin, characterised by undeformed planar bedding, laterally passing to a gentle slope where the deformed horizons alternate with undeformed beds. Here, two types of gravity slides have been differentiated on the basis of different kinds of SSDSs, brittle deformation, involved lithofacies, geometry and morphology. Type 1 slump sheets, involving marl-limestone couplets, are characterised by chaotic stratification, truncated beds, recumbent folds, tension gashes, clastic dikes and small-scale listric normal faults and thrusts. They moved downslope as a rotational slump, displaying the typical wedge-shaped morphology, becoming thicker toe-wards. Type 2 slump sheets, involving bed packages of lime mudstone, are characterised by arcuate slump scars developing downwards as listric normal faults, associated with rotational beds and bulging. Displaying tabular geometries, they moved coherently along an overall bedding parallel detachment surface as a translational glide characterised by sediment creep. Regional geology indicates that the basin (Sicanian), bordered by a stepped carbonate platform, was affected by synsedimentary tectonics throughout the Mesozoic. The synsedimentary extensional tectonics that affect the Upper Triassic-Jurassic deposits with steeped normal faults, causing tilt-block and instability of the seafloor through fluidization processes, triggered the rotational slumps of the lower portion of the section. Seismic shocks, induced by outside sector tectonics, like those recorded in the adjacent Busambra stepped carbonate platform margin, triggered the rotational slumps that are not

  17. Voces en un campo de sangre: Max Aub y los penúltimos episodios nacionales

    Directory of Open Access Journals (Sweden)

    Joan Oleza Simó

    2002-11-01

    Full Text Available Certain reading of postmodernity has diagnosed (actually, offered the end of history, and therefore the end of historical novel, although some of us choose not to bury it but to bring it to live again. Within the context of this debate it is worth to stop at Max Aub's Laberinto mágico, which is a Spanish Civil War magnificent mural as well as one of the last manifestation of the pure model of national episode, Galdós and Valle Inclán's ultimate legacy. In spite of containing apparent heterogeneous elements, the historical and ideological signs in Campo cerrado (1939 are the ones of modern historical novel. In the following campos, Aub's historical-novel formula reached its maturity, Campo del moro (1963 possibly being the most brilliant and balanced example in this modality among the novels of the series. In it, the of history announced in, Campo del moro banishes away as a victim of treason and shocked by the madness that grows on Madrid's streets. Campo del moro could be considered a pure historical novel, since the necessary felicity conditions are accomplished, causing this genre to be completely fulfilled: historicity of the events and respect for the chronological order in which they occur; fiction limited by the historical referent; initiative of the historical events over fiction, and power of the public logic over the private; and last but not least, narrativity of the events manifestated in the selection of the golpe de estado of Casado and Besteiro and their enlightment as the key to the historical story. Three are the big issues that are presented in the argumental logic of the novel: treason, the confusion in the maze and the heroic cause degradation. ln Max Aub's speech, which feeds the novel, fiction, reality and history are weaved together to the point of creating Ariadna's in the Maze.

  18. Crude Exploration: Portraying Industrial Disaster in Deepwater Horizon, a Film Directed By Peter Berg, 2016 Crude Exploration: Portraying Industrial Disaster in Deepwater Horizon, a Film Directed By Peter Berg, 2016 .

    Science.gov (United States)

    Dixon, Shane; Gawley, Tim

    2017-08-01

    The 2016 film Deepwater Horizon offers a rare portrayal of industrial disaster. It is novel as there are few film-based treatments of this issue. The film enables the public to learn about the disaster, the lives lost, and the stories of survival, but it also provides the opportunity to examine how industrial disaster and, by extension, occupational health and safety may be publicly framed and understood. This article presents an analysis of Deepwater Horizon. Four primary industrial disaster frames are identified in the film: profit maximization, technology and technology failure, managerial conflict, and worker portrayals. Each frame offers advantages and limitations for enhancing public understandings of industrial disaster. Missing from the film is the regulatory environment of the oil drilling industry, whose omission serves to potentially reproduce messages that privilege individualistic, isolated, views of industrial disasters and prioritize immediate over distal causes.

  19. Formation and inversion of transtensional basins in the western part of the Lachlan Fold Belt, Australia, with emphasis on the Cobar Basin

    Science.gov (United States)

    Glen, R. A.

    The Palaeozoic history of the western part of the Lachlan Fold Belt in New South Wales was dominated by strike-slip tectonics. In the latest Silurian to late Early Devonian, an area of crust >25,000 km 2 lying west of the Gilmore Suture underwent regional sinistral transtension, leading to the development of intracratonic successor basins, troughs and flanking shelves. The volcaniclastic deep-water Mount Hope Trough and Rast Trough, the siliciclastic Cobar Basin and the volcanic-rich Canbelego-Mineral Hill Belt of the Kopyje Shelf all were initiated around the Siluro-Devonian boundary. They all show clear evidence of having evolved by both active syn-rift processes and passive later post-rift (sag-phase) processes. Active syn-rift faulting is best documented for the Cobar Basin and Mount Hope Trough. In the former case, the synchronous activity on several fault sets suggests that the basin formed by sinistral transtension in response to a direction of maximum extension oriented NE-SW. Structures formed during inversion of the Cobar Basin and Canbelego-Mineral Hill Belt indicate closure under a dextral transpressive strain regime, with a far-field direction of maximum shortening oriented NE-SW. In the Cobar Basin, shortening was partitioned into two structural zones. A high-strain zone in the east was developed into a positive half-flower structure by re-activation of early faults and by formation of short-cut thrusts, some with strike-slip movement, above an inferred steep strike-slip fault. Intense subvertical cleavage, a steep extension lineation and variably plunging folds are also present. A lower-strain zone to the west developed by syn-depositional faults being activated as thrusts soling into a gently dipping detachment. A subvertical cleavage and steep extension lineation are locally present, and variably plunging folds are common. Whereas Siluro-Devonian basin-opening appeared to be synchronous in the western part of the fold belt, the different period of

  20. Evaluation of genotoxicity and cytotoxicity of water samples from the Sinos River Basin, southern Brazil

    Directory of Open Access Journals (Sweden)

    E Bianchi

    Full Text Available Some water bodies in the Sinos River Basin (SRB have been suffering the effects of pollution by residential, industrial and agroindustrial wastewater. The presence of cytotoxic and genotoxic compounds could compromise the water quality and the balance of these ecosystems. In this context, the research aimed to evaluate the genotoxicity and cytotoxicity of the water at four sites along the SRB (in the cities of Santo Antônio da Patrulha, Parobé, Campo Bom and Esteio, using bioassays in fish and cell culture. Samples of surface water were collected and evaluated in vitro using the Astyanax jacuhiensis fish species (micronucleus test and comet assay and the Vero lineage of cells (comet assay and cytotoxicity tests, neutral red - NR and tetrazolium MTT. The micronucleus test in fish showed no significant differences between the sampling sites, and neither did the comet assay and the MTT and NR tests in Vero cells. The comet assay showed an increase in genetic damage in the fish exposed to water samples collected in the middle and lower sections of the basin (Parobé, Campo Bom and Esteio when compared to the upper section of the basin (Santo Antônio da Patrulha. The results indicate contamination by genotoxic substances starting in the middle section of the SRB.

  1. The Search for Eight Glacial Cycles of Deep-Water Temperatures and Global ice Volume From the Southern Hemisphere

    Science.gov (United States)

    Ferretti, P.; Elderfield, H.; Greaves, M.; McCave, N.

    2007-12-01

    It has been recently suggested "a substantial portion of the marine 100-ky cycle that has been object of so much attention over the past quarter of a century is, in reality, a deep-water temperature signal and not an ice volume signal" (Shackleton, 2000). There are currently few records available of deep-water temperature variations during the Pleistocene and most of our understanding is inferred from the oxygen isotopic composition (δ18O) of benthic foraminifera from deep-sea sediments. However, variations in benthic δ18O reflect some combination of local to regional changes in water mass properties (largely deep- water temperature) as well as global changes in seawater δ18O (δ18Osw) resulting from the growth and decay of continental ice. Recent studies suggest that benthic foraminiferal Mg/Ca may be useful in reconstructing deep-water temperature changes, but the application of this method to benthic species has been hampered by a number of unresolved issues, such as uncertainties related to the calibration for benthic Mg at the coldest temperatures. Here we present deep-sea Mg/Ca and δ18O records for the past eight glacial cycles in benthic foraminiferal ( Uvigerina spp.) calcite from a marine sediment core recovered in the mid Southern latitudes. Ocean Drilling Program Site 1123 was retrieved from Chatham Rise, east of New Zealand in the Southwest Pacific Ocean (3290 m water depth). This site lies under the Deep Western Boundary Current (DWBC) that flows into the Pacific Ocean, and is responsible for most of the deep water in that ocean; DWBC strength is directly related to processes occurring around Antarctica. Temperatures derived via pore fluid modeling of the last glacial maximum are available from Site 1123 and represent an important tool to constrain deep-water temperatures estimates using Mg/Ca. In selected time slices, we measured B/Ca ratios in Uvigerina in order to gain information on the deep-water carbonate saturation state and have data of Mg

  2. From frequent hurricanes to the Deepwater Horizon oil spill in coastal Louisiana: the impact of regulatory change

    Directory of Open Access Journals (Sweden)

    So-Min Cheong

    2014-06-01

    Full Text Available The issue of whether adaptations to past disasters can impede adaptation to new disasters of a different type or intensity will be analyzed by examining the transition from frequent hurricanes to the Deepwater Horizon oil spill in coastal Louisiana. In particular, the effects of changed regulatory structures from the Stafford Act to the Oil Pollution Act of 1990 in response to the Deepwater Horizon oil spill are investigated. The article describes how the federal, state, and local governments adjust. In addition, it illustrates the shifting focus on the environment with the activation of the Oil Pollution Act and the Clean Water Act. It wraps up with a discussion of the uncertainty that is pervasive in the case of the oil spill derived from changed regulations and the novelty of the disaster.

  3. Consumer Perceptions of Seafood Industries in the Wake of the Deepwater Horizon Oil Spill and Fukushima Daiichi Nuclear Disaster

    OpenAIRE

    McKendree, Melissa G.S.; Ortega, David L.; Widmar, Nicole Olynk; Wang, H. Holly

    2013-01-01

    The impact of environmental disasters on consumers’ perceptions and preferences for specific food items has seldom been studied in the applied economics literature. Recent aquatic disasters, namely the Deepwater Horizon Oil Spill and Fukushima Daiichi Nuclear Disaster, have had profound impacts on fisheries serving US consumers and on agribusinesses within the aquaculture industry. This study explores consumer preferences using a nation-wide representative sample, and finds that twenty-nine p...

  4. Characterization of Underwater Sounds Produced by a Hydraulic Cutterhead Dredge during Maintenance Dredging in the Stockton Deepwater Shipping Channel, California

    Science.gov (United States)

    2014-03-01

    underwater sound had not been linked to dredging projects. However, concerns for negative impacts of underwater noise on aquatic species (e.g. salmon ... METHODS Study site. The Port of Stockton is a major inland deepwater port in Stockton, California, located on the San Joaquin River before it joins... of Cook Inlet, Alaska. The authors reported that ambient sound levels ranged from 95 dB in the Knik Arm to 124 dB near Point Possession on an incoming

  5. Secobatzellines A and B, two new enzyme inhibitors from a deep-water Caribbean sponge of the genus Batzella.

    Science.gov (United States)

    Gunasekera, S P; McCarthy, P J; Longley, R E; Pomponi, S A; Wright, A E

    1999-08-01

    Secobatzelline A (1), a new batzelline natural analogue, and secobatzelline B (2), a likely artifact formed during the isolation procedure, have been isolated from a deep-water marine sponge of the genus Batzella. Secobatzellines A and B inhibited the phosphatase activity of calcineurin, and secobatzelline A inhibited the peptidase activity of CPP32. Both compounds showed in vitro cytotoxicity against P-388 and A-549 cell lines. The isolation and structure elucidation of secobatzellines A (1) and B (2) are described.

  6. A new species of deep-water Holothuroidea (Echinodermata of the genus Synallactes from off western Mexico

    Directory of Open Access Journals (Sweden)

    Claude Massin

    2010-08-01

    Full Text Available An undescribed species of Synallactes was collected during a deep-water benthic fauna survey off the Pacific coast of Mexico in the East Pacific, with the R/V El Puma. This new species differs from all the other known Synallactes by the presence of huge massive rods in the tube feet, some of them club-shaped. The later ossicle shape is unique among Holothuroidea. This is the first record of a Synallactes in the Gulf of California.

  7. Transport of Blue Crab Larvae in the Northern Gulf of Mexico During the Deepwater Horizon Oil Spill

    Science.gov (United States)

    2015-05-11

    the Deepwater Horizon (DWH) oil spill. The DWH spill, the largest accidental marine oil spill in US history (Graham et al. 2011), started when the...DWH oil platform, situ- ated 80 km southeast of Venice , Louisiana, ex- ploded and sank on 20 April 2010. An estimated 4.0 million barrels of oil...al. (1980). Using this ffiM together with spawning and larval behavior parameters from the known natural history of blue crabs, we ran 24

  8. Upper Paleogene shallow-water events in the Sandino Forearc Basin, Nicaragua-Costa Rica - response to tectonic uplift

    Science.gov (United States)

    Andjic, Goran; Baumgartner-Mora, Claudia; Baumgartner, Peter O.

    2016-04-01

    The Upper Cretaceous-Neogene Sandino Forearc Basin is exposed in the southeastern Nicaraguan Isthmus and in the northwestern corner of Costa Rica. It consists of an elongated, slightly folded belt (160 km long/30 km wide). During Campanian to Oligocene, the predominantly deep-water pelagic, hemipelagic and turbiditic sequences were successively replaced by shelf siliciclastics and carbonates at different steps of the basin evolution. We have made an inventory of Tertiary shallow-water limestones in several areas of Nicaragua and northern Costa Rica. They always appear as isolated rock bodies, generally having an unconformable stratigraphic contact with the underlying detrital sequences. The presence of these short-lived carbonate shoals can be attributed to local or regional tectonic uplift in the forearc area. The best-preserved exposure of such a carbonate buildup is located on the small Isla Juanilla (0.15 km2, Junquillal Bay, NW Costa Rica). The whole island is made of reef carbonates, displaying corals in growth position, associated with coralline red algae (Juanilla Formation). Beds rich in Larger Benthic Foraminifera such as Lepidocyclina undosa -favosa group permit to date this reef as late Oligocene. A first uplift event affected the Nicaraguan Isthmus, that rose from deep-water to shelfal settings in the latest Eocene-earliest Oligocene. The upper Oligocene Juanilla Formation formed on an anticline that developed during the early Oligocene, contemporaneously with other folds observed in the offshore Sandino Forearc Basin. During the early Oligocene, a period of global sea-level fall, the folded tectonic high underwent deep erosion. During the late Oligocene, a time of overall stable eustatic sea level, tectonic uplift gave way to moderate subsidence, creating accommodation space for reef growth. A 4th or 5th order (Milankovic-type) glacio-eustatic sea level rise, could also have triggered reef growth, but its preservation implies at least moderate

  9. Caesalpinioideae (Leguminosae nos Campos Rupestres do Parque Estadual do Itacolomi, MG, Brasil Caesalpinioideae (Leguminosae in "Campos Rupestres" of Itacolomi State Park, Minas Gerais State, Brazil

    Directory of Open Access Journals (Sweden)

    Valquíria Ferreira Dutra

    2008-06-01

    Full Text Available Este trabalho consiste do estudo florístico de Caesalpinioideae dos Campos Rupestres do Parque Estadual do Itacolomi (PEI, localizado no sul da Cadeia do Espinhaço. As coletas foram mensais, no período entre setembro/2003 e outubro/2004. Foram encontradas 13 espécies de Caesalpinioideae, reunidas em três gêneros: Bauhinia, Chamaecrista e Senna. O gênero Chamaecrista foi o que mais se destacou em número de espécies. Foram elaboradas chaves para identificação das espécies, além de diagnoses, ilustrações e comentários sobre afinidades, distribuição geográfica e fenologia das mesmas.This work consists of a floristic study of the Caesalpinioideae in "Campos Rupestres" at Itacolomi State Park, southern Espinhaço Range. Collections were carried out monthly from September 2003 to October 2004. Thirteen species of Caesalpinioideae belonging to three genera were found: Bauhinia, Chamaecrista and Senna. The genus Chamaecrista had the highest number of species. Species identification keys are presented, as well as descriptions, illustrations and comments on morphological relationships, geographic distribution and phenology.

  10. Sedimentary architecture of a sub-lacustrine debris fan: Eocene Dongying Depression, Bohai Bay Basin, east China

    Science.gov (United States)

    Liu, Jianping; Xian, Benzhong; Wang, Junhui; Ji, Youliang; Lu, Zhiyong; Liu, Saijun

    2017-12-01

    The sedimentary architectures of submarine/sublacustrine fans are controlled by sedimentary processes, geomorphology and sediment composition in sediment gravity flows. To advance understanding of sedimentary architecture of debris fans formed predominantly by debris flows in deep-water environments, a sub-lacustrine fan (Y11 fan) within a lacustrine succession has been identified and studied through the integration of core data, well logging data and 3D seismic data in the Eocene Dongying Depression, Bohai Bay Basin, east China. Six types of resedimented lithofacies can be recognized, which are further grouped into five broad lithofacies associations. Quantification of gravity flow processes on the Y11 fan is suggested by quantitative lithofacies analysis, which demonstrates that the fan is dominated by debris flows, while turbidity currents and sandy slumps are less important. The distribution, geometry and sedimentary architecture are documented using well data and 3D seismic data. A well-developed depositional lobe with a high aspect ratio is identified based on a sandstone isopach map. Canyons and/or channels are absent, which is probably due to the unsteady sediment supply from delta-front collapse. Distributary tongue-shaped debris flow deposits can be observed at different stages of fan growth, suggesting a lobe constructed by debrite tongue complexes. Within each stage of the tongue complexes, architectural elements are interpreted by wireline log motifs showing amalgamated debrite tongues, which constitute the primary fan elements. Based on lateral lithofacies distribution and vertical sequence analysis, it is proposed that lakefloor erosion, entrainment and dilution in the flow direction lead to an organized distribution of sandy debrites, muddy debrites and turbidites on individual debrite tongues. Plastic rheology of debris flows combined with fault-related topography are considered the major factors that control sediment distribution and fan

  11. Drill string corrosion problems at Pilar field; Corrosao na coluna de perfuracao no Campo de Pilar

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, Antimio Santos [PETROBRAS, XX (Brazil). Distrito de Perfuracao do Nordeste. Setor de Fluidos de Perfuracao

    1988-12-31

    Drilling column failures and washout problems are described as experienced in the Sergipe-Alagoas Basin`s Pilar field. Statistical data presented indicate the extent of this problem. A discussion is offered on causes detected and solutions adopted. (author) 3 refs., 16 figs.

  12. Deepwater fish assemblages at Isla del Coco National Park and Las Gemelas Seamount, Costa Rica

    Directory of Open Access Journals (Sweden)

    Richard M. Starr

    2012-11-01

    Full Text Available The deepwater faunas of oceanic islands and seamounts of the Eastern Tropical Pacific are poorly known. From 11-22 September 2009 we conducted an exploration of the deepwater areas of the Isla del Coco Marine Conservation Area, Costa Rica and a nearby seamount using a manned submersible. The goal of the exploration was to characterize the habitats and biota, and conduct quantitative surveys of the deepwater portions of Isla del Coco National Park and Las Gemelas Seamount, located about 50km southwest of Isla del Coco. We completed a total of 22 submersible dives, spanning more than 80hr underwater, and collected a total of 36hr of video. We surveyed habitats from 50-402m and observed more than 45 species of fishes, some of which have not yet been described and are likely new to science. The diversity of fish species in deep water at Isla del Coco National Park was lower than the diversity of fishes in shallow water, and eight species groups accounted for more than 95% of the total fish biomass. The combined density of all fish species was higher at Las Gemelas Seamount (253 fishes/100m² than at Isla del Coco National Park (138 fishes/100m². The combined density of fishes in habitats comprised primarily of bedrock or large boulders outcrops was more than three times as high at Las Gemelas Seamount as it was at Isla del Coco National Park. This discrepancy was caused by the extremely high concentration of Anthiinae fishes in rocky habitats at Las Gemelas Seamount. Densities of fishes in the other habitats were similar between the two sites. Similarly, when estimates of fish density were plotted by slope categories the density was much greater on steep slopes, which were usually comprised of rock habitats. Also, the density of fishes was greatest on high rugosity habitats. Results of these submersible surveys indicate that seamounts in the tropical eastern Pacific Ocean may be an important source of biodiversity and that more quantitative surveys

  13. Seed storage-mediated dormancy alleviation in Fabaceae from campo rupestre

    Directory of Open Access Journals (Sweden)

    Naïla Nativel

    2015-09-01

    Full Text Available ABSTRACTWe studied the effects of seed storage on germination and dormancy alleviation in three species of Fabaceae endemic to campo rupestrein southeastern Brazil. Fresh seeds of Collaea cipoensis, Mimosa maguirei and Mimosa foliolosawere set to germinate and germination of seeds after four, five and 13 years of storage was tested. Seed viability was maintained for all species after the full storage period. Seed storage significantly increased germination percentage and decreased germination time for C. cipoensisand M. foliolosa, suggesting the alleviation of physical dormancy with storage. However, we did not find evidence of dormancy alleviation in M. maguirei since stored seeds showed a decrease in germination in comparison to that of fresh seeds. Our data indicate species-specific storage-mediated dormancy alleviation, which will have important implications for restoration of campo rupestre.

  14. Campos de golf y medio ambiente. Una interacción necesaria

    Directory of Open Access Journals (Sweden)

    Cayetano Espejo Marín

    2004-01-01

    Full Text Available Desde finales de la década de los años ochenta del siglo pasado hay una preocupación generalizada por el impacto de los campos de golf sobre el medio ambiente. Varias Comunidades Autónomas españolas han redactado una normativa que permite controlar la incidencia de los campos de golf sobre dos aspectos fundamentales: las transformaciones paisajísticas y la procedencia del agua consumida. Las evaluaciones de impacto ambiental y el uso cada vez más generalizado de aguas depuradas contribuyen a minimizar los efectos sobre el entorno de estas instalaciones, que constituyen una interesante oferta turística de calidad sin estacionalidad.

  15. Enseñanza del campo eléctrico mediante el uso de simulaciones computacionales

    OpenAIRE

    Alzugaray, Gloria E.; Carreri, Ricardo A.; Marino, Luis A.

    2009-01-01

    El objetivo de este trabajo es proponer el abordaje del campo eléctrico a partir de un modelo de guía didáctica basada en el uso de un programa de simulación de libre acceso, aplicado en las actividades de trabajos prácticos de la asignatura Física Eléctrica. La formulación de la guía didáctica fue diseñada con el fin de favorecer la construcción significativa de conocimientos en el área electromagnetismo, en particular relacionado a los siguientes contenidos: ley de Coulomb, campo eléctri...

  16. Photoreceptors in electric field : Fotoreceptores em campo elétrico

    OpenAIRE

    Juliana Guerra Hühne

    2015-01-01

    Resumo: Estudos anteriores e evidências experimentais sugerem um papel importante dos campos elétricos endógenos no direcionamento da migração celular, no desenvolvimento e na regeneração celular e na cicatrização de feridas. Em culturas de células, campos elétricos de corrente contínua influenciam a divisão celular, a polaridade, a forma e a motilidade das células. As distrofias das células fotoreceptoras são uma das principais causas de cegueira hereditária no mundo ocidental; a aplicação d...

  17. Historia Reciente: apuntes sobre un campo de investigación en expansión

    Directory of Open Access Journals (Sweden)

    Marina Franco

    Full Text Available Este artículo se dedica a presentar las que consideramos características centrales del campo de la Historia Reciente, que en Argentina desarrolla en la última década un proceso de consolidación intelectual e institucional y una marcada expansión en la cantidad de investigaciones -plasmadas en tesis, artículos, libros y ponencias-. Repasamos para ello los principales problemas epistemológicos y políticos de esta área de la historiografía, presentamos algunos datos cuantitativos para dar cuenta del proceso de expansión, proponemos un balance de los principales nudos en que se concentra la producción y señalamos las áreas de vacancia y desafíos con que se encuentra el campo de la Historia Reciente en la actualidad.

  18. Il campo dell'arte: regole e valori dell'istituzione letteraria

    Directory of Open Access Journals (Sweden)

    Paola Avella

    2011-07-01

    Full Text Available Si considera in questo articolo il campo artistico, descritto da Pierre Bourdieu, come il teatro di una lotta per la conquista del monopolio della legittimità letteraria tra (disposizioni sociali, a cui corrispondono precise strategie simboliche, concorrenti. Viene, così, messo in discussione il mito della gratuità e del disinteresse del lavoro intellettuale insieme a quello dell’esperienza estetica come identificazione immediata e contemplazione dell’opera. Le istanze di legittimazione interne al campo, infatti, determinano i modi della produzione, ma anche quelli dell’appropriazione. Solo un fruitore dotato della competenza adeguata sarà in grado di riconoscere il valore esemplificazionale inscritto nel testo.

  19. Uma abordagem sociológica da sociologia: a ciência como campo

    Directory of Open Access Journals (Sweden)

    Vívian Matias dos Santos

    2012-03-01

    Full Text Available O presente ensaio objetiva analisar como o conceito de campo de Pierre Bourdieu pode contribuir para uma abordagem sociológica da Sociologia. A discussão desdobra-se desde a reflexão mais geral de como se firma a ciência até as possibilidades de compreensão da Sociologia neste espaço. Para tanto, fez-se necessário abordar o “campo científico” por meio das relações entre sua estrutura e seus agentes - relações “multidimensionais” que podem representar uma exitosa tentativa de superação da dicotomia ação/estrutura; indivíduo/sociedade; micro e macroteorização.

  20. O campo magnético e a massa dos mésons

    OpenAIRE

    Camila Sampaio Machado

    2013-01-01

    Neste trabalho buscamos explorar os efeitos do campo magnético, criado em colisões de íons pesados não-centrais, em estados ligados. Motivados pelo caso do átomo de hidrogênio, onde a presença do campo magnético deixa o estado mais ligado,estudamos o caso dos mésons B e D. Inicialmente trabalhamos com a equação de Schrödinger e utilizamos o modelo de potencial de Cornell que faz uma boa descrição da espectroscopoia de mésons pesados. Em seguida, utilizando as regras de soma da QCD, procuram...

  1. La Neurociencia Computacional hoy: II. El Proyecto Blue Brain, un ejemplo muy representativo en el campo

    Directory of Open Access Journals (Sweden)

    Jesús Cortés

    2009-01-01

    Full Text Available La Neurociencia Computacional es un campo reciente, pero bien establecido dentro de las Neurociencias. En un primer artículo (Cortés, 2009, http://www.cienciacognitiva.org/?p=55, “Qué es y por qué es difícil su estudio”, explico su principal paradigma: todo proceso mental que tiene lugar en nuestro cerebro tiene un circuito o cableado físico que lo sustenta. En este artículo comento un ejemplo muy representativo en el campo: el macro-proyecto de simulación a gran escala y en tiempo real de procesos en la corteza cerebral, el famoso Blue Brain Project.

  2. Los campos fantasmas en la renormalización de un modelo Lagrangiano t-J

    Directory of Open Access Journals (Sweden)

    Oscar P. Zandron

    2011-01-01

    Full Text Available En presente trabajo hemos tratado el rol de los campos fantasmas en el proceso de renormalización del formalismo Lagrangiano perturbativo para un modelo t-J. Mostramos que con la incorporación de campos fantasmas apropiados en los propagadores y vértices de la teoría, la misma puede ser renormalizada a todo orden. Esto se pone en evidencia en el estudio detallado de la renormalización del propagador ferromagnético del magnón, mostrando el ablandamiento térmico de la frecuencia. También hemos analizado el caso antiferromagnético, y estos resultados fueron confrontados con estudios previos en teorías del "spin-polarón".

  3. EL PROBLEMA DE LA CIUDADANIA: UNA APROXIMACION DESDE EL CAMPO DE LA COMUNICACION-EDUCACION

    Directory of Open Access Journals (Sweden)

    Humberto J. Cubides C.

    1998-01-01

    Full Text Available Diversos autores en su análisis de la sociedad contemporánea intentan resignificar el concepto de ciudadanía para responder a la pregunta de cómo lograr en nuestras sociedades complejas idear una base común de solidaridad social, respetando el pluralismo. El autor, acogiendo el término de ciudadanía contestable, y a partir de la revisión de las teorías clásicas de ciudadanía (liberal, comunitarista y neorrepublicana respecto de los rasgos básicos que definen el concepto, realiza un abordaje novedoso y sugerente al tema desde las categorías en construcción del campo de comunicación-educación, campo que define como estratégico.

  4. Orientação pelo campo geomagnético

    Directory of Open Access Journals (Sweden)

    Pedro Henrique Arruda Aragão

    1985-11-01

    Full Text Available In the past few years scientists have shown that some kinds of organisms utilize the geomagnetic field as a mechanism of orientation. Last September, in analyzing samples of water and sediments collected from Igapo Lake, in Londrina neighborhood, we realized that it also contained this kind of microorganisms, which also utilizes magnetic field lines for its orientation.Estudos realizados nestes últimos anos têm mostrado que algumas espécies de organismos fazem uso do campo geomagnético como mecanismo de orientação. Em setembro último, analisando amostras de água e sedimentos da periferia do Lago Igapó – Londrina, pudemos observar a existência de microorganismos que utilizam as linhas de campo para orientação.

  5. Desempeño de sensores de campo electrostático en sistemas de alerta de tormentas

    OpenAIRE

    Aranguren Fino, Harby Daniel

    2011-01-01

    Esta tesis presenta un estudio operacional y científico de sensores de campo electrostático mediante el análisis de tormentas eléctricas en tres lugares: Colombia (2010), usando una estación de medida en Bogotá; Florida - EE.UU (2009), usando 31 sensores en el Kennedy Space Center - KSC y Navarra - España (2010), con 11 molinos de campo en parques eólicos. En total se analizaron cerca de 67000 medidas de variaciones de campo eléctrico producidas por rayos. En cada sitio se uso adicionalmente ...

  6. Development of aqueous fluids with bentonite clay for drilling of onshore oil wells; Conceitos, feicoes diagnosticas e exemplos sismicos de dobras associadas a falhas distensionais na secao rifte das bacias de Campos e Santos

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Mario Neto Cavalcanti de; Silva, Paulo Cezar Santarem da; Matos, Gabriel Correa de [PETROBRAS SA. (CENPES/PETROBRAS), Rio de Janeiro, RJ (Brazil). Centro de Pesquisas e Desenvolvimento Leopoldo A. Miguez de Mello. Gerencia de Geologia Estrutural e Geotectonica], Emails: marioaraujo@petrobras.com.br, paulosantarem@petrobras.com.br, gabriel.matos@petrobras.com.br; Lima, Rodrigo Dias [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). E e P. Gerencia de Interpretacao das Bacias da Costa Sudeste], Email: rodrigolima@petrobras.com.br

    2008-11-15

    With the exception of the salt-related rollover folds of the Brazilian Continental Margin, folds are not features commonly associated with extensional faults. N-S-trending folds are common features in the hanging wall or above the termination of normal basement faults of the pre, syn and post-rift sequences of the Campos and Santos basins. Regional compression, differential compaction and local transpression are interpreted as the main reasons to explain the formation of folds in the Brazilian margin. However, they can also be formed as a result of the interplay among kinematics, amount of slip and geometry of faults. Two main types of fault-related folds are strongly influenced by geometry and kinematics: fault-bend folds and fault-propagation folds. Fault-bend folds are flexures formed as a result of dip changes of the fault plane. The folds are formed by the collapse of the hanging wall block as it passes over the top of bends in the fault plane. Fault-propagation folds form when movement of basement faults propagates deformation above their tip into a stratified rift and/or post-rift sequence. In this case, the movement of the buried normal fault produces folding in the overlying rocks, without expressive rupture of the beds. Movement along these folds can be accompanied by flexural slip mechanisms, allowing their lateral migration away from the fault plane and the formation of fold swarms like those in the Campos and Santos basins. The strong geometrical relationships of fault-bend and fault-propagation folds not only facilitate the predictive interpretation of these structures in seismic sections, but also allow measurement of stretching, reservoir quality predictions and fracture intensity estimates. In the Campos and Santos basins, regional scale fault-bend and fault-propagation folds might be responsible for the structural control of basement highs and depressions, distribution and migration of depo centers, and location of fractured zones. Fold swarms

  7. Overview of avian toxicity studies for the Deepwater Horizon Natural Resource Damage Assessment

    Science.gov (United States)

    Bursian, Steven J.; Alexander, C.R.; Cacela, Dave; Cunningham, Fred L.; Dean, Karen M.; Dorr, Brian S.; Ellis, Christine K.; Godard-Codding, Céline A.J.; Guglielmo, Christopher G.; Hanson-Dorr, Katie C.; Harr, Kendall E.; Healy, Katherine A.; Hooper, Michael J.; Horak, Katherine E.; Isanhart, John P.; Kennedy, Lisa V.; Link, Jane E.; Maggini, Ivan; Moye, John K.; Perez, Christina R.; Pritsos, Chris A.; Shriner, Susan A.; Trust, Kinberly A.; Tuttle, Peter L.

    2017-01-01

    The Oil Pollution Act of 1990 establishes liability for injuries to natural resources because of the release or threat of release of oil. Assessment of injury to natural resources resulting from an oil spill and development and implementation of a plan for the restoration, rehabilitation, replacement or acquisition of natural resources to compensate for those injuries is accomplished through the Natural Resource Damage Assessment (NRDA) process. The NRDA process began within a week of the Deepwater Horizon oil spill, which occurred on April 20, 2010. During the spill, more than 8500 dead and impaired birds representing at least 93 avian species were collected. In addition, there were more than 3500 birds observed to be visibly oiled. While information in the literature at the time helped to identify some of the effects of oil on birds, it was not sufficient to fully characterize the nature and extent of the injuries to the thousands of live oiled birds, or to quantify those injuries in terms of effects on bird viability. As a result, the US Fish and Wildlife Service proposed various assessment activities to inform NRDA injury determination and quantification analyses associated with the Deepwater Horizon oil spill, including avian toxicity studies. The goal of these studies was to evaluate the effects of oral exposure to 1–20 ml of artificially weathered Mississippi Canyon 252 oil kg bw-1 day-1 from one to 28 days or one to five applications of oil to 20% of the bird's surface area. It was thought that these exposure levels would not result in immediate or short-term mortality but might result in physiological effects that ultimately could affect avian survival, reproduction and health. These studies included oral dosing studies, an external dosing study, metabolic and flight performance studies and field-based flight studies. Results of these studies indicated changes in hematologic endpoints including formation of Heinz bodies and changes in cell counts

  8. The 2010 Deepwater Horizon oil spill: the trauma signature of an ecological disaster.

    Science.gov (United States)

    Shultz, James M; Walsh, Lauren; Garfin, Dana Rose; Wilson, Fiona E; Neria, Yuval

    2015-01-01

    The 2010 Deepwater Horizon “British Petroleum (BP)” oil spill was a mega-disaster characterized as the petroleum industry’s largest-volume marine oil spill in history. Following a “wellhead blowout” that destroyed the drilling platform, 4.9 million barrels of petroleum flowed into the Gulf of Mexico over 87 days and the spill expanded to cover 68,000 square miles of sea surface. However, despite the expansive scope of the event, systematic surveys of affected coastal populations found only modest effects on mental health and substance abuse. An established trauma signature (TSIG) methodology was used to examine the psychological consequences in relation to exposure to the unique constellation of hazards associated with the spill. A hazard profile, a matrix of psychological stressors, and a “trauma signature” summary for the affected Gulf Coast population--in terms of exposure to hazard, loss, and change--were created specifically for this human-generated ecological disaster. Psychological risk characteristics of this event included: human causation featuring corporate culpability, large spill volume, protracted duration, coastal contamination from petroleum products, severe ecological damage, disruption of Gulf Coast industries and tourism, and extensive media coverage. The multiple impact effect was notable due to prior exposure of the region to Hurricane Katrina. These stressors were counterbalanced by the relative absence of other prominent risks for distress and psychopathology. Coastal residents did not experience significant onshore spill-related mortality or severe injury, shortages of survival needs, disruption of vital services (health care, schools, utilities, communications, and transportation), loss of homes, population displacement, destruction of the built environment, or loss of social supports. Initial acute economic losses were partially offset by large-sum BP payments for cleanup and recovery of the coastal economy. Not only did Gulf

  9. Environmental DNA from Seawater Samples Correlate with Trawl Catches of Subarctic, Deepwater Fishes.

    Directory of Open Access Journals (Sweden)

    Philip Francis Thomsen

    Full Text Available Remote polar and deepwater fish faunas are under pressure from ongoing climate change and increasing fishing effort. However, these fish communities are difficult to monitor for logistic and financial reasons. Currently, monitoring of marine fishes largely relies on invasive techniques such as bottom trawling, and on official reporting of global catches, which can be unreliable. Thus, there is need for alternative and non-invasive techniques for qualitative and quantitative oceanic fish surveys. Here we report environmental DNA (eDNA metabarcoding of seawater samples from continental slope depths in Southwest Greenland. We collected seawater samples at depths of 188-918 m and compared seawater eDNA to catch data from trawling. We used Illumina sequencing of PCR products to demonstrate that eDNA reads show equivalence to fishing catch data obtained from trawling. Twenty-six families were found with both trawling and eDNA, while three families were found only with eDNA and two families were found only with trawling. Key commercial fish species for Greenland were the most abundant species in both eDNA reads and biomass catch, and interpolation of eDNA abundances between sampling sites showed good correspondence with catch sizes. Environmental DNA sequence reads from the fish assemblages correlated with biomass and abundance data obtained from trawling. Interestingly, the Greenland shark (Somniosus microcephalus showed high abundance of eDNA reads despite only a single specimen being caught, demonstrating the relevance of the eDNA approach for large species that can probably avoid bottom trawls in most cases. Quantitative detection of marine fish using eDNA remains to be tested further to ascertain whether this technique is able to yield credible results for routine application in fisheries. Nevertheless, our study demonstrates that eDNA reads can be used as a qualitative and quantitative proxy for marine fish assemblages in deepwater oceanic

  10. Salt Marsh Bacterial Communities before and after the Deepwater Horizon Oil Spill.

    Science.gov (United States)

    Engel, Annette Summers; Liu, Chang; Paterson, Audrey T; Anderson, Laurie C; Turner, R Eugene; Overton, Edward B

    2017-10-15

    Coastal salt marshes along the northern Gulf of Mexico shoreline received varied types and amounts of weathered oil residues after the 2010 Deepwater Horizon oil spill. At the time, predicting how marsh bacterial communities would respond and/or recover to oiling and other environmental stressors was difficult because baseline information on community composition and dynamics was generally unavailable. Here, we evaluated marsh vegetation, physicochemistry, flooding frequency, hydrocarbon chemistry, and subtidal sediment bacterial communities from 16S rRNA gene surveys at 11 sites in southern Louisiana before the oil spill and resampled the same marshes three to four times over 38 months after the spill. Calculated hydrocarbon biomarker indices indicated that oil replaced native natural organic matter (NOM) originating from Spartina alterniflora and marine phytoplankton in the marshes between May 2010 and September 2010. At all the studied marshes, the major class- and order-level shifts among the phyla Proteobacteria , Firmicutes , Bacteroidetes , and Actinobacteria occurred within these first 4 months, but another community shift occurred at the time of peak oiling in 2011. Two years later, hydrocarbon levels decreased and bacterial communities became more diverse, being dominated by Alphaproteobacteria ( Rhizobiales ), Chloroflexi ( Dehalococcoidia ), and Planctomycetes Compositional changes through time could be explained by NOM source differences, perhaps due to vegetation changes, as well as marsh flooding and salinity excursions linked to freshwater diversions. These findings indicate that persistent hydrocarbon exposure alone did not explain long-term community shifts. IMPORTANCE Significant deterioration of coastal salt marshes in Louisiana has been linked to natural and anthropogenic stressors that can adversely affect how ecosystems function. Although microorganisms carry out and regulate most biogeochemical reactions, the diversity of bacterial

  11. Question of uncertainty : Transitioning from hurricanes to the BP Deepwater Horizon oil spill in coastal Louisiana

    Science.gov (United States)

    Cheong, S.

    2013-12-01

    Uncertainty is highlighted in the case of the oil spill. Hurricane is considered a known factor that people are used to and know how to handle. This uncertainty is primarily attributed to the magnitude of the spill. As the largest spill in the U.S., the long-term effects of the spill are difficult to assess. Uncertainty, however, has more to do with the novelty of the disaster and the accompanying regulatory change than the specific characteristics of this spill such as the size and longevity of the spill. The unfamiliarity with the Oil Pollution Act results in a lack of knowledge and uncertainty about local and state responses to the spill. The unpreparedness and unfamiliarity of this spill accompanied by different regulations underlie people's sense of uncertainty. This paper examines coastal Louisiana's shift from frequent hurricanes to the BP Deepwater Horizon oil spill in 2010, particularly focusing on the effects of changed regulations from the Stafford Act to the Oil Pollution Act. It documents how the federal, state, and local governments adjust, and discusses the shifting emphasis to the environment with the activation of the Oil Pollution Act and the Clean Water Act. One assumption is that people's established ways of behavior are commonly shaped by their previous experience of disasters, but this can paradoxically hinder their timely adaptation to new or different, high- impact environmental change. This leads to testing the hypothesis whether greater vulnerabilities result from adaptations to previous and well-known disasters. Results: The structural differences in regulations dictate the way governments and communities respond and adapt to the oil spill. The new set of regulations during the BP Deepwater Horizon oil spill unlike the ones during hurricanes served as barriers to adaptation. Governments at federal, state, and local levels had difficulties adjusting to new rules and changed authorities, and they, in turn, generated uncertainty and

  12. DISTRIBUCIÓN ESPACIAL DEL AMACHAMIENTO DEL FRIJOL (Aphelenchoides besseyi CHRISTIE EN CAMPO

    Directory of Open Access Journals (Sweden)

    N\\u00E9stor Felipe Chaves-Barrantes

    2014-01-01

    Full Text Available El objetivo del presente trabajo fue determinar la distribución espacial del amachamiento en campo. La investigación se realizó entre mayo y julio del 2009 en las comunidades de Veracruz de Pérez Zeledón, San José y Concepción de Buenos Aires, Puntarenas, Costa Rica. Para ello se evaluó la incidencia de la enfermedad por punto de siembra en dos parcelas de frijol provenientes de distintas rotaciones (arroz/frijol y maíz/fri - jol, con lo cual, posteriormente se determinó la distribución espacial de la enfermedad en campo por medio de un análisis de corridas y los índices de varianza/media (V/M, Lloyd y Morisita. En el análisis de corridas se obtuvo un valor pro - medio de Z de -1,06 para la parcela sembrada previamente con arroz, y de -0,98 para la parcela sembrada previamente con maíz, lo que indica una tendencia a la agregación. Los índices de V/M, Lloyd y Morisita fueron mayores que 1 en ambas parcelas, por lo que se determinó que el amacha - miento presentó un patrón espacial agregado (en parches en condiciones de campo. El patrón espacial del amachamiento en campo tiende a enmascararse debido a la rotación con cultivos hospederos de Aphelenchoides besseyi , – su agente causal –, en especial la rotación maíz/frijol donde el produc - tor redistribuye el inóculo de la enfermedad cuando esparce las cañas de maíz sobre el terreno de cultivo

  13. Molecular identification of Hepatozoon canis in dogs from Campo Grande, Mato Grosso do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Carlos Alberto do Nascimento Ramos

    Full Text Available The aim of this study was to investigate the occurrence of Hepatozoon species infecting dogs in the municipality of Campo Grande, Mato Grosso do Sul (MS, Brazil, using blood samples (n = 165 drawn from dogs. The species Hepatozoon caniswas identified in 3.63% of the tested animals using molecular tools. Further studies are needed to determine the clinical relevance of this infection and the main arthropod vectors involved in its transmission.

  14. Molecular identification of Hepatozoon canis in dogs from Campo Grande, Mato Grosso do Sul, Brazil

    OpenAIRE

    Ramos,Carlos Alberto do Nascimento; Babo-Terra,Verônica Jorge; Pedroso,Thatianna Camillo; Souza Filho,Antônio Francisco; Ribeiro de Araújo,Flábio; Cleveland,Herbert Patric Kellermann

    2015-01-01

    The aim of this study was to investigate the occurrence of Hepatozoon species infecting dogs in the municipality of Campo Grande, Mato Grosso do Sul (MS), Brazil, using blood samples (n = 165) drawn from dogs. The species Hepatozoon caniswas identified in 3.63% of the tested animals using molecular tools. Further studies are needed to determine the clinical relevance of this infection and the main arthropod vectors involved in its transmission.

  15. Molecular identification of Hepatozoon canis in dogs from Campo Grande, Mato Grosso do Sul, Brazil.

    Science.gov (United States)

    Ramos, Carlos Alberto do Nascimento; Babo-Terra, Verônica Jorge; Pedroso, Thatianna Camillo; Souza Filho, Antônio Francisco; de Araújo, Flábio Ribeiro; Cleveland, Herbert Patric Kellermann

    2015-01-01

    The aim of this study was to investigate the occurrence of Hepatozoon species infecting dogs in the municipality of Campo Grande, Mato Grosso do Sul (MS), Brazil, using blood samples (n = 165) drawn from dogs. The species Hepatozoon canis was identified in 3.63% of the tested animals using molecular tools. Further studies are needed to determine the clinical relevance of this infection and the main arthropod vectors involved in its transmission.

  16. Nefrectomia videolaparoscópica em Graxaim-do-campo (Pseudalopex gymnocercus com displasia renal

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    João P.S. Feranti

    2014-08-01

    Full Text Available Graxains-do-campo habitam o centro-leste da América do Sul, desde o sudeste do Brasil e leste da Bolívia. A displasia renal compreende um espectro de anomalias e é frequentemente relatada em cães de diversas raças, sendo a maioria dos relatos achados de necropsia. A maior parte das doenças renais congênitas nos cães apresenta caráter progressivo, portanto o tratamento é limitado e direcionado a fim de retardar a progressão da doença renal estabelecida. No presente relato é descrita a realização de nefrectomia laparoscópica em graxaim-do-campo (Pseudalopex gymnocercus com displasia renal. Suspeitou-se de doença no rim direito por meio de ultrassonografia e urografia excretora. Para o procedimento cirúrgico foram utilizados três portais (10, 10, 5mm, endoscópio rígido de 10mm/0(0 e clipes para hemostasia dos vasos renais. A técnica cirúrgica utilizada neste canídeo selvagem foi semelhante à usada em cão doméstico, devido à escassez de relatos em cirurgias em graxaim e a inexistência de descrições de nefrectomia videolaparoscópica em graxaim-do-campo. O animal foi acompanhado por um período de 30 dias pós-cirurgia sem a ocorrência de complicações. O presente relato demonstra que a técnica proposta foi adequada para a realização de nefrectomia videolaparoscópica em Graxaim-do-campo.

  17. El proceso de selección natural en el campo social del ballet en Cuba

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    Hamlet Betancourt León

    2010-09-01

    Full Text Available El campo del ballet es un sistema social conflictivo donde se manifiesta gran competitividad -reflejada en continuas selecciones sociales y naturales- para cumplimentar la fantasía de todos los bailarines: bailar públicamente. El objetivo de esta investigación es demostrar la pertinencia del supuesto teórico darwinista de selección natural en la discriminación de belleza escénica de la figura del bailarín en el sistema piramidal de selección, formación y desempeño profesional del campo cubano del ballet. El campo del ballet se registra fácticamente en instituciones culturales pobladas por individuos que persiguen cotidianamente crear bailarines profesionales aptos -primera condición es ser revolucionario- que representen internacionalmente a la Revolución Cubana. El campo se estructura en un sistema piramidal de selección, formación y desempeño de bailarines profesionales que rige sus prácticas principales de exclusión/inclusión -puntos de corte- por el principio darwinista de selección natural. Los exámenes de capacidades físicas de ingreso y pase de nivel a la enseñanza de nivel medio y la aceptación a la compañía profesional Ballet Nacional de Cuba conforman los puntos de corte del sistema piramidal. Estos contienen prácticas sociales que valoran -empírica, pero sistemáticamente- las características morfo-funcionales de los participantes interesados respecto al deber ser del canon artístico de figura, para seleccionar siempre a los más bellos, los más aptos, bailarines de ballet.

  18. Salida de campo a Suances (Cantabria) el 27 y 28 de agosto de 1950

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo a Suances, Cantabria, el 27 y 28 de agosto de 1950, de la que se anotaron observaciones sobre las siguientes aves: Actitis hypoleucos (Andarríos chico, llamado Actynioides hypoleucus por el autor), Arenaria interpres (Vuelvepiedras común), Calidris sp. (Correlimos), Carduelis cannabina (Pardillo común, llamada Colorín y Acanthis cannabina por el autor), Carduelis carduelis (Jilguero), Charadrius hiaticula (Chorlitejo grande), Corvus corax (Cuervo), Falco tinnunculus (Cernícalo...

  19. Salida de campo a Les Echets (Francia) el 7 de junio de 1954

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo a Les Echets (Francia) el 7 de junio de 1954, de la que se anotaron observaciones sobre las siguientes aves: Carduelis sp. (seguramente, el Jilguero, C.carduelis), Columba oenas (Paloma zurita), Miliaria calandra (Triguero, llamada Emberiza calandra por el autor), Phoenicurus ochruros (Colirrojo tizón), Phylloscopus collybita (Mosquitero común), Saxicola torquata (Tarabilla común), Streptopelia sp. (Tórtola) y Sylvia communis (Curruca zarcera). Field trip to Les Echets (Fra...

  20. Salida de campo al Sotillo (Valladolid) el 5 de febrero de 1952

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo al "Sotillo", en Valladolid capital, el 5 de febrero de 1952, de la que se anotaron observaciones sobre las siguientes aves: Accipiter nisus (Gavilán común, también llamado Astur palumbarius por el autor), Aegithalos caudatus (Mito), Alectoris rufa (Perdiz roja), Cettia cetti (Ruiseñor bastardo), Corvus frugilegus (Graja), Corvus monedula (Grajilla, llamada Coloeus por el autor), Cyanistes caeruleus (Herrerillo común, llamado Parus coeruleus por el autor), Emberiza cirlus (Es...

  1. Incidence and prevalence of systemic sclerosis in Campo Grande, State of Mato Grosso do Sul, Brazil.

    Science.gov (United States)

    Horimoto, Alex Magno Coelho; Matos, Erica Naomi Naka; Costa, Márcio Reis da; Takahashi, Fernanda; Rezende, Marcelo Cruz; Kanomata, Letícia Barrios; Locatelli, Elisangela Possebon Pradebon; Finotti, Leandro Tavares; Maegawa, Flávia Kamy Maciel; Rondon, Rosa Maria Ribeiro; Machado, Natália Pereira; Couto, Flávia Midori Arakaki Ayres Tavares do; Figueiredo, Túlia Peixoto Alves de; Ovidio, Raphael Antonio; Costa, Izaias Pereira da

    Systemic sclerosis is an autoimmune disease which shows extreme heterogeneity in its clinical presentation and that follows a variable and unpredictable course. Although some discrepancies in the incidence and prevalence rates between geographical regions may reflect methodological differences in the definition and verification of cases, they may also reflect true local differences. To determine the prevalence and incidence of systemic sclerosis in the city of Campo Grande, state capital of Mato Grosso do Sul (MS), Brazil, during the period from January to December 2014. All health care services of the city of Campo Grande - MS with attending in the specialty of Rheumatology were invited to participate in the study through a standardized form of clinical and socio-demographic assessment. Physicians of any specialty could report a suspected case of systemic sclerosis, but necessarily the definitive diagnosis should be established by a rheumatologist, in order to warrant the standardization of diagnostic criteria and exclusion of other diseases resembling systemic sclerosis. At the end of the study, 15 rheumatologists reported that they attended patients with systemic sclerosis and sent the completed forms containing epidemiological data of patients. The incidence rate of systemic sclerosis in Campo Grande for the year 2014 was 11.9 per million inhabitants and the prevalence rate was 105.6 per million inhabitants. Systemic sclerosis patients were mostly women, white, with a mean age of 50.58 years, showing the limited form of the disease with a mean duration of the disease of 8.19 years. Regarding laboratory tests, 94.4% were positive for antinuclear antibody, 41.6% for anti-centromere antibody and 19.1% for anti-Scl70; anti-RNA Polymerase III was performed in 37 patients, with 16.2% positive. The city of Campo Grande, the state capital of MS, presented a lower incidence/prevalence of systemic sclerosis in comparison with those numbers found in US studies and close

  2. WRITTEN THAT CONVERGE: A POETIC RESONANCE BETWEEN HAROLDO DE CAMPOS AND HERBERTO HELDER

    Directory of Open Access Journals (Sweden)

    Geovanna Marcela da Silva Guimarães

    2015-08-01

    Full Text Available The objective of this work, based on readings of O grau zero da escrita (2000 by Roland Barthes, O trabalho da citação (2013 by Antoine Compagnon and on the critical fortune about the poetic works of Haroldo de Campos and Herberto Helder, is to demonstrate how the poetic writings of these authors poetically and historically converge between them.

  3. Quality control of 5mg diazepam suppositories manipulated in the city of Campos Goytacazes – RJ

    OpenAIRE

    Renata Aparecida Venturi Canzian; Fernanda Fraga Pessanha; Jean Carlos Brandão Storck

    2012-01-01

    Diazepam suppositories are widely used by children and elderly, and require close attention to quality control because it is a controlled prescription drug. The objective of the study was to analyze diazepam suppositories manipulated in Campos dos Goytacazes, RJ, to verify if they are within the required quality standards, and offer safety and efficiency to patients. We analyzed samples of 5mg diazepam suppositories acquired in five randomly selected pharmacies, identified as Pharmacy A, Phar...

  4. The archaeological context of Levantine rock Art in Campo de Hellín (Albacete

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    Gabriel GARCÍA ATIÉNZAR

    2012-03-01

    Full Text Available This work explores the knowledge of human settlement and the Levantine rock Art in a specific geographical context. The spatial reading of these elements allows to present hypotheses on human communities that occupied lands of the Campo de Hellín (Albacete during the first phases of Holocene and how they built a landscape that reflects their social, economic and symbolic needs.

  5. Urban forest and environmental inequality in Campos dos Goytacazes, Rio de Janeiro, Brazil

    DEFF Research Database (Denmark)

    Silva, Victor; Pedlowski, Marcos; Heynen, Nikolas

    2002-01-01

    Social and spatial inequality regarding environmental resources and services is one of most complex issues affecting contemporary urban life. The objective of this research is to study the spatial distribution of trees in public areas in Campos dos Goytacazes, Rio de Janeiro, Brazil. This researc...... and education levels of the population seem to play a more causal on tree quantity and species diversity. This inequality stresses a problem with environmental justice, a characteristic of Brazilian cities intrinsically connected to urban sustainability....

  6. Origen de la gran industria en la comarca del Campo de Gibraltar

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    María José Foncubierta Rodríguez

    2010-11-01

    Full Text Available Cuando en la década de los sesenta se pusieron en marcha los Planes Nacionales de Desarrollo, la comarca del Campo de Gibraltar vivía una situación de pobreza y de analfabetismo, caracterizada por la servidumbre de su población al uso militar de gran parte de su territorio, y a la presencia de la colonia británica de Gibraltar. La calificación como Zona de Preferente Localización Industrial, hizo que en el Arco de la Bahía de Algeciras se instalara un conjunto de grandes empresas que han transformado sensiblemente la comarca, en términos de empleo, económicos e incluso de cualificación de los ciudadanos. Palabras-clave: Grandes industrias, Campo de Gibraltar, Planes de Desarrollo, Bahía de Algeciras.___________________________ABSTRACT:When in the sixties are launched the National Development Plans, in order to avoid regional imbalance, the region of Campo de Gibraltar suffered a socio-economic situation of poverty and illiteracy, which was characterized by the easement to military use of its territory, and the presence of the British colony of Gibraltar. Its classification as Industrial Location Preferred Zone was the cause of a set of large companies to be installed at the Bay of Algeciras, which have significantly transformed the situation in this area, in terms of employment, economy, and even their people´s qualification.Keywords: Large industries, Campo de Gibraltar, Development Plans, Bay of Algeciras

  7. Espacio y desaparición: los campos de concentración en Argentina

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    Colombo, Pamela

    2011-12-01

    Full Text Available The main goal of this article is to investigate how the use of forced disappearances in Argentina (1974-1983 caused modifications to the unique spatial characteristics of their concentration camps. Specifically, I analyze three aspects: the removal within the camps of spatial-temporal references to the disappeared persons, the manner in which these victims remain present within the camps despite their disappearance, and the manner in which the outside space penetrates and superimposes itself upon the camp. This analysis is upheld by personal in depth interviews I had in Tucumán with relatives of the Disappeared and with survivors of the concentration camps.

    Partiendo de la hipótesis de que la técnica aniquilación por desaparición forzada de personas en Argentina (1974-1983 reconfiguró el espacio; el trabajo que desarrollo en el presente artículo consiste en indagar acerca de las particularidades de la dimensión espacial en los campos de concentración en Tucumán. El análisis gira en torno a tres ejes centrales: la negación de las referencias espacio-temporales a los detenidos-desaparecidos dentro del campo; el modo en que los desaparecidos «a pesar de todo» se representan un espacio y un tiempo concentracionario; y por último, el modo en que superponen e interpenetran los espacios del afuera con el adentro del campo. Este trabajo de análisis se sustenta en entrevistas en profundidad que he realizado a familiares de desaparecidos y sobrevivientes de campos de concentración en Tucumán.

  8. O campo da Lingüística Documentária

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    Maria de Fátima Gonçalves Moreira Tálamo

    Full Text Available Proposição do campo da Lingüística Documentária cuja função primordial é a de estabelecer parâmetros e modelos de elaboração de códigos para o processamento da informação - construção e recuperação - com o objetivo de responder à questão, nuclear da área de Ciência da Informação, relacionada à transformação de conteúdos registrados em elementos estruturados. Para isso, enfatizam-se, tanto os traços que relacionam este campo à revolução lingüística em curso desde o século 20, como as interfaces que tal campo mantém com as disciplinas que abordam a linguagem sob os aspectos sintático, semântico, conceitual e comunicacional, definindo-se seus problemas específicos bem como discutindo seus vértices conceituais.

  9. Conceitos sobre o modelo de campos e armas da competição

    Directory of Open Access Journals (Sweden)

    Jose Celso Contador

    2008-01-01

    Full Text Available http://dx.doi.org/10.5007/2175-8069.2008v10n21p147 O modelo de Campos e Armas da Competição (CAC vem sendo publicado como referencial teórico de muitos estudos, porém, de forma fragmentada. Devido ao grau de consolidação que atingiu, é o momento de publicá-lo na íntegra, a fim de lançá-lo à discussão na comunidade científica da área de Estratégia. É um modelo da Teoria da Competitividade validado cientificamente, que, por ser qualitativo e quantitativo, tem vantagens em relação ao modelo de Porter, RBV e Balanced Scorecard. Ele nasceu de uma idéia simples: separar, de acordo com o interesse do cliente, as chamadas vantagens competitivas, distinguindo as que lhe interessam das que não lhe interessam. As primeiras referem-se aos campos da competição, e, as segundas, às armas da competição. Os campos da competição estão relacionados à estratégia competitiva de negócio, e as armas da competição às estratégias competitivas operacionais. Este é o primeiro artigo de uma série de três.

  10. Pesquisa de campo qualitativa: uma vivência em geografia humanista

    Directory of Open Access Journals (Sweden)

    Rita Jaqueline Nogueira Chiapetti

    2011-01-01

    Full Text Available O objetivo deste artigo é descrever a experiência de uma pesquisa de campo qualitativa em Geografia, com uma abordagem humanista. A pesquisa de campo foi feita no município de Itacaré, sul do estado da Bahia, com o propósito compreender como os sujeitos de Itacaré percebem o rio das Contas, qual é o significado do rio para eles. Como método de pesquisa de campo, optamos pela história oral e pelas técnicas da entrevista, da observação e, ainda, pelo registro de paisagens através de fotografias. A nossa presença em Itacaré foi importante para o êxito da pesquisa porque pudemos conhecer melhor as pessoas e o seu cotidiano, fato que contribuiu para a qualidade das informações contidas nas 41 entrevistas feitas. Também, essa convivência com as pessoas do lugar foi uma grande experiência vivida na perspectiva da Geografia Humanista.

  11. El trabajo de campo: clave en la investigación cualitativa

    Directory of Open Access Journals (Sweden)

    Virginia Inés Soto-Lesmes

    2010-01-01

    Full Text Available Objetivo: destacar la experiencia de la inserción al campo no sólo como la forma de recolectar información y determinar la calidad de los datos en que se basan los hallazgos, análisis y conclusiones, sino, también como elemento integrador del proceso de investigación que permita realizar una lectura de la realidad más específica. Método: a través de la investigación Experiencias de las adolescentes embarazadas en la localidad de Kennedy en la ciudad de Bogotá. Deseando el embarazo pero no tan pronto, se describen el estudio cualitativo y los antecedentes de la investigación, y se presentan las fases propias de la inserción. Conclusión: como método, la inserción al campo trasciende el acceso al dato; exige una acción dialéctica entre la teoría y la práctica, ya que el trabajo de campo requiere una formación teórico-metodológica y, al mismo tiempo, se sustenta en diversas técnicas y herramientas para la investigación.

  12. Teaching arithmetic at the primary school in the nineteenth century: the memories of Humberto de Campos

    Directory of Open Access Journals (Sweden)

    Maria Laura Magalhães Gomes

    2017-09-01

    Full Text Available This article focuses on the narrative of Humberto de Campos in his first volume of memoirs (1886-1900 with regard to the education of the author. The first section emphasizes the importance of autobiographical writing for research in History of Education, and especially in History of Mathematics Education. The second section is a brief presentation of Humberto de Campos as a Brazilian writer. The next part discusses the theoretical and methodological foundations adopted for the use of autobiographical sources in research. The core of the text consists of the approach of the main school experiences narrated by Humberto de Campos in Parnaíba, in the interior of the state of Piauí, in the 1890s, highlighting practices that involve mathematical knowledge. The writer’s school memories emphasize the material precariousness of elementary education, the simultaneous teaching of many students of different levels in schools managed by a single teacher and the teaching methods based on repetition and memorization and supported in practices of punishment and humiliation of students.

  13. Aegla rosanae Campos Jr., um novo sinônimo de Aegla paulensis Schmitt (Crustacea, Aeglidae Aegla rosanae Campos Jr., a new synonym of Aegla paulensis Schmitt (Crustacea, Aeglidae

    Directory of Open Access Journals (Sweden)

    Georgina Bond-Buckup

    2000-06-01

    Full Text Available The validity of Aegla rosanae Campos Jr., 1998 as a new species was analysed. On the basis of comparisons with Aegla paulensis Schmitt, A. rosanae was considered its junior synonym.

  14. Estudio del Efecto de Campos Magnéticos en Citoesqueleto de Osteoblastos Humanos Estudio del Efecto de Campos Magnéticos en Citoesqueleto de Osteoblastos Humanos

    Directory of Open Access Journals (Sweden)

    Modesto Sosa Aquino

    2012-02-01

    Full Text Available En este trabajo se presentan los resultados obtenidos de la aplicación de Campos Magnéticos (CM tanto pulsados (CMP como estáticos (CME en la morfología de osteoblastos humanos. El efecto de dichos campos ha sido medido por medio del análisis de la estructura de la β-tubulina, la cual es una proteína que forma parte del citoesqueleto celular. El campo magnético aplicado fue de 0.65 mT en el caso del CMP y de 0.5 mT en el caso del CME. La aplicación de los CM provoca alteración en el patrón de distribución normal de las redes de microtúbulos, dando lugar a la formación de agregados fluorescentes en la región cortical de la membrana celular. Las observaciones obtenidas con respecto a loscambios morfológicos de los osteoblastos, indican claramente que éstos son sensibles a la estimulación con CM, alterando su actividad celular a través de cambios en la estructuradel citoesqueleto celular.In this work are presented the results obtained from the application of magnetic fields (MF, both pulsed (PMF and static (SMF, on the morphology of human osteoblasts. The effectof such fields has been evaluated through the analysis of the structure of the β-tubuline, which is protein that forms part of the cellular cytoskeleton. The applied fields were 0.65 m Tand 0.5 mT for PMF and SMF, respectively. The application of the MF produces alterations in the pattern of normal distribution of microtubules, which gives rise to the formation of fluorescent aggregates in the cortical region of the cellular membrane. The obtained results with respect to the morphological changes in the osteoblasts clearly suggest that these are sensitive to stimulation with MFs, which alter its cellular activity through changes in cytoskeletal structures.

  15. Evidence of lipofuscin accumulation in the deep-water red shrimp Aristaeomorpha foliacea (Risso, 1827

    Directory of Open Access Journals (Sweden)

    V. MEZZASALMA

    2008-12-01

    Full Text Available Lipofuscin, a non-degradable, degenerative fluorescent pigment which accumulates in post-mitotic cells, represents a promising method for ageing marine crustaceans. The presence and accumulation of lipofuscin has been studied in the deep-water red shrimp Aristaeomorpha foliacea (Risso, 1827 to assess its use as a tool for ageing larger (i.e., older specimens and thus improve knowledge of the growth and longevity of this species. Specimens, gathered during experimental trawl surveys carried out in the Strait of Sicily (Mediterranean Sea, were stored directly on-board in 10% buffered formaldehyde solution; their brain was thereafter removed, prepared with various current histological techniques and examined with a binocular microscope. Thin sections of the olfactory lobe cell mass were also analyzed using fluorescence microscopy, and the lipofuscin concentration was measured through image analysis. Various indices were computed for each individual by pooling data from many images: number and coverage of the lipofuscin granules per unit area, and mean individual area of the granules. Lipofuscin was detected in all specimens investigated with characteristics (grain typology and dimension strictly resembling those already described in other crustacean species. The present preliminary results encourage further studies to develop and validate a methodology based on the use of lipofuscin for improving the relative ageing of large A. foliacea shrimps.

  16. Near-bottom pelagic bacteria at a deep-water sewage sludge disposal site

    Energy Technology Data Exchange (ETDEWEB)

    Takizawa, M.; Straube, W.L.; Hill, R.T.; Colwell, R.R.

    1994-01-01

    The epibenthic bacterial community at deep-ocean sewage sludge disposal site DWD-106, located approximately 106 miles (ca. 196 km) off the coast of New Jersey, was assessed for changes associated with the introduction of large amounts of sewage sludge. Mixed cultures and bacterial isolates obtained from water overlying sediment core samples collected at the deep-water (2,500 m) municipal sewage disposal site were tested for the ability to grow under in situ conditions of temperature and pressure. The responses of cultures collected at a DWD-106 station heavily impacted by sewage sludge were compared with those of samples collected from a station at the same depth which was not contaminated by sewage sludge. Significant differences were observed in the ability of mixed bacterial cultures and isolates from the two sites to grow under deep-sea pressure and temperature conditions. The levels of sludge contamination were established by enumerating Clostridium perfringens, a sewage indicator bacterium, in sediment samples from the two sites. (Copyright (c) 1993, American Society for Microbiology.)

  17. Evidence for the bioerosion of deep-water corals by echinoids in the Northeast Atlantic

    Science.gov (United States)

    Stevenson, Angela; Rocha, Carlos

    2013-01-01

    In situ video observations of echinoids interacting with deep-sea coral are common in the deep-sea, but paradoxically the deep-sea literature is devoid of reports of bioerosion by extant echinoids. Here we present evidence of contemporary bioerosion of cold-water coral by four species of deep-sea echinoids, Gracilechinus elegans, Gracilechinus alexandri, Cidaris cidaris, and Araeosoma fenestratum, showing that they actively predate on the living framework of reef building corals, Lophelia pertusa and Madrepora oculata, in the NE Atlantic. Echinoid specimens were collected in six canyons located in the Bay of Biscay, France and two canyons on the north side of the Porcupine Bank and Goban Spur, Ireland. A total of 44 live specimens from the four taxa (9 of G. elegans, 4 of G. alexandri, 21 of C. cidaris and 10 of A. fenestratum) showed recent ingestion of the coral infrastructure. Upon dissection, live coral skeleton was observed encased in a thick mucus layer within the gastrointestinal tract of G. elegans and G. alexandri while both live and dead coral fragments were found in C. cidaris and A. fenestratum. Echinoid bioerosion limits the growth of shallow-water reefs. Our observations suggest that echinoids may also play an important role in the ecology of deep-water coral reefs.

  18. EMG activity of hip and trunk muscles during deep-water running.

    Science.gov (United States)

    Kaneda, Koichi; Sato, Daisuke; Wakabayashi, Hitoshi; Nomura, Takeo

    2009-12-01

    The present study used synchronized motion analysis to investigate the activity of hip and trunk muscles during deep-water running (DWR) relative to land walking (LW) and water walking (WW). Nine healthy men performed each exercise at self-determined slow, moderate, and fast paces, and surface electromyography was used to investigate activity of the adductor longus, gluteus maxima, gluteus medius, rectus abdominis, oblique externus abdominis, and erector spinae. The following kinematic parameters were calculated: the duration of one cycle, range of motion (ROM) of the hip joint, and absolute angles of the pelvis and trunk with respect to the vertical axis in the sagittal plane. The percentages of maximal voluntary contraction (%MVC) of each muscle were higher during DWR than during LW and WW. The %MVC of the erector spinae during WW increased concomitant with the pace increment. The hip joint ROMs were larger in DWR than in LW and WW. Forward inclinations of the trunk were apparent for DWR and fast-paced WW. The pelvis was inclined forward in DWR and WW. In conclusion, the higher-level activities during DWR are affected by greater hip joint motion and body inclinations with an unstable floating situation.

  19. Astronomically paced middle Eocene deepwater circulation in the western North Atlantic

    Science.gov (United States)

    Vahlenkamp, Maximilian; Niezgodzki, Igor; De Vleeschouwer, David; Bickert, Torsten; Harper, Dustin; Lohmann, Gerrit; Pälike, Heiko; Zachos, James C.

    2017-04-01

    The role of the Atlantic Meridional Overturning Circulation (AMOC) as a key player for abrupt climatic changes (e.g. Heinrich Stadials) during the Pleistocene is relatively well constrained. However, the timing of the onset of a „modern" North Atlantic Deepwater (NADW) formation are still debated: Recent estimates range from the middle Miocene to the Early Eocene [Davies et al., 2001, Stoker et al., 2005, Hohbein et al., 2012] and are mainly based on the seismic interpretation contourite drifts. Another understudied aspect of the AMOC is its behavior during climatic variations on orbital time scales and under different climatic boundary conditions (icehouse vs hothouse). IODP Expedition 342 drilled carbonate-rich sequences from sediment drifts offshore Newfoundland that cover the middle Eocene with high sedimentation rates ( 3 cm/ kyr). We present a 2 Myr long stable carbon and oxygen isotope record of benthic foraminifera nuttalides truempyi spanning magnetochron C20r in unprecedented resolution (Petroleum Geology, v. 22, no. 9, p. 977-1005. Hohbein, M. W., Sexton, P. F., and Cartwright, J. A., 2012, Onset of North Atlantic Deep Water production coincident with inception of the Cenozoic global cooling trend: Geology, v. 40, no. 3, p. 255-258.

  20. Deep impact : destruction and sinking of Deepwater Horizon a blow to offshore industry

    International Nuclear Information System (INIS)

    Anon.

    2010-01-01

    In the weeks following the blowout in British Petroleum's (BP) Macondo well in the Gulf of Mexico on April 20, 2010, the implications for the industry spread quickly, impacting operations around the world. When the Deepwater Horizon exploded, killing 11 crew members, the immediate impact of the blowout resulted in at least 5,000 barrels per day of oil leaking out of the wellbore. This article discussed the impacts of the oil blowout from the well and the response from BP, rig owner Transocean Ltd., and Haliburton. As of mid-May, 2010, several attempts to plug the well were unsuccessful. Solutions that attempted to block the well from leaking were presented, including several low-tech solutions to attack the two main sources of oil which were the failed blowout preventer and the crumpled up riser resting on the sea floor. The article noted that as a last solution the well could be intersected with a relief well that could block the flow at depth. This option could take two or three months to reach the required depth. The article then discussed the costs of the oil spill to BP, fisheries, the tourism industry, and other hard-hit sectors. It was concluded that similar to the spill caused by the Exxon Valdez in Alaska 21 years ago, the Gulf disaster will affect the image of the industry for years to come. 5 figs.

  1. Deepwater Horizon oil spill impacts on sea turtles could span the Atlantic.

    Science.gov (United States)

    Putman, Nathan F; Abreu-Grobois, F Alberto; Iturbe-Darkistade, Iñaky; Putman, Emily M; Richards, Paul M; Verley, Philippe

    2015-12-01

    We investigated the extent that the 2010 Deepwater Horizon oil spill potentially affected oceanic-stage sea turtles from populations across the Atlantic. Within an ocean-circulation model, particles were backtracked from the Gulf of Mexico spill site to determine the probability of young turtles arriving in this area from major nesting beaches. The abundance of turtles in the vicinity of the oil spill was derived by forward-tracking particles from focal beaches and integrating population size, oceanic-stage duration and stage-specific survival rates. Simulations indicated that 321 401 (66 199-397 864) green (Chelonia mydas), loggerhead (Caretta caretta) and Kemp's ridley (Lepidochelys kempii) turtles were likely within the spill site. These predictions compared favourably with estimates from in-water observations recently made available to the public (though our initial predictions for Kemp's ridley were substantially lower than in-water estimates, better agreement was obtained with modifications to mimic behaviour of young Kemp's ridley turtles in the northern Gulf). Simulations predicted 75.2% (71.9-76.3%) of turtles came from Mexico, 14.8% (11-18%) from Costa Rica, 5.9% (4.8-7.9%) from countries in northern South America, 3.4% (2.4-3.5%) from the United States and 1.6% (0.6-2.0%) from West African countries. Thus, the spill's impacts may extend far beyond the current focus on the northern Gulf of Mexico. © 2015 The Authors.

  2. Biomarkers reveal sea turtles remained in oiled areas following the Deepwater Horizon oil spill

    Science.gov (United States)

    Vander Zanden, Hannah B.; Bolten, Alan B.; Tucker, Anton D.; Hart, Kristen M.; Lamont, Margaret M.; Fujisaki, Ikuko; Reich, Kimberly J.; Addison, David S.; Mansfield, Katherine L.; Phillips, Katrina F.; Pajuelo, Mariela; Bjorndal, Karen A.

    2016-01-01

    Assessments of large-scale disasters, such as the Deepwater Horizon oil spill, are problematic because while measurements of post-disturbance conditions are common, measurements of pre-disturbance baselines are only rarely available. Without adequate observations of pre-disaster organismal and environmental conditions, it is impossible to assess the impact of such catastrophes on animal populations and ecological communities. Here, we use long-term biological tissue records to provide pre-disaster data for a vulnerable marine organism. Keratin samples from the carapace of loggerhead sea turtles record the foraging history for up to 18 years, allowing us to evaluate the effect of the oil spill on sea turtle foraging patterns. Samples were collected from 76 satellite-tracked adult loggerheads in 2011 and 2012, approximately one to two years after the spill. Of the 10 individuals that foraged in areas exposed to surface oil, none demonstrated significant changes in foraging patterns post spill. The observed long-term fidelity to foraging sites indicates that loggerheads in the northern Gulf of Mexico likely remained in established foraging sites, regardless of the introduction of oil and chemical dispersants. More research is needed to address potential long-term health consequences to turtles in this region. Mobile marine organisms present challenges for researchers to monitor effects of environmental disasters, both spatially and temporally. We demonstrate that biological tissues can reveal long-term histories of animal behavior and provide critical pre-disaster baselines following an anthropogenic disturbance or natural disaster.

  3. Impacts of the Deepwater Horizon oil spill evaluated using an end-to-end ecosystem model.

    Science.gov (United States)

    Ainsworth, Cameron H; Paris, Claire B; Perlin, Natalie; Dornberger, Lindsey N; Patterson, William F; Chancellor, Emily; Murawski, Steve; Hollander, David; Daly, Kendra; Romero, Isabel C; Coleman, Felicia; Perryman, Holly

    2018-01-01

    We use a spatially explicit biogeochemical end-to-end ecosystem model, Atlantis, to simulate impacts from the Deepwater Horizon oil spill and subsequent recovery of fish guilds. Dose-response relationships with expected oil concentrations were utilized to estimate the impact on fish growth and mortality rates. We also examine the effects of fisheries closures and impacts on recruitment. We validate predictions of the model by comparing population trends and age structure before and after the oil spill with fisheries independent data. The model suggests that recruitment effects and fishery closures had little influence on biomass dynamics. However, at the assumed level of oil concentrations and toxicity, impacts on fish mortality and growth rates were large and commensurate with observations. Sensitivity analysis suggests the biomass of large reef fish decreased by 25% to 50% in areas most affected by the spill, and biomass of large demersal fish decreased even more, by 40% to 70%. Impacts on reef and demersal forage caused starvation mortality in predators and increased reliance on pelagic forage. Impacts on the food web translated effects of the spill far away from the oiled area. Effects on age structure suggest possible delayed impacts on fishery yields. Recovery of high-turnover populations generally is predicted to occur within 10 years, but some slower-growing populations may take 30+ years to fully recover.

  4. Development and Testing of a Post-Installable Deepwater Monitoring System Using Fiber-Optic Sensors

    Science.gov (United States)

    Seaman, Calvin H.; Brower, David V.; Le, Suy Q.; Tang, Henry H.

    2015-01-01

    This paper addresses the design and development of a fiber-optic monitoring system that can be deployed on existing deepwater risers and flowlines; and provides a summary of test article fabrication and the subsequent laboratory testing performed at the National Aeronautics and Space Administration-Johnson Space Center (NASA-JSC). A major challenge of a post-installed instrumentation system is to ensure adequate coupling between the instruments and the riser or flowline of interest. This work investigates the sensor coupling for pipelines that are suspended in a water column (from topside platform to seabed) using a fiber-optic sensor clamp and subsea bonding adhesive. The study involved the design, fabrication, and test of several prototype clamps that contained fiber-optic sensors. A mold was produced by NASA using 3-D printing methods that allowed the casting of polyurethane clamp test articles to accommodate 4-inch and 8-inch diameter pipes. The prototype clamps were installed with a subsea adhesive in a "wet" environment and then tested in the NASA Structures Test Laboratory (STL). The tension, compression, and bending test data showed that the prototype sensor clamps achieved good structural coupling, and could provide high quality strain measurement for active monitoring.

  5. Impacts of gold mine waste disposal on deepwater fish in a pristine tropical marine system

    International Nuclear Information System (INIS)

    Brewer, D.T.; Milton, D.A.; Fry, G.C.; Dennis, D.M.; Heales, D.S.; Venables, W.N.

    2007-01-01

    Little is known about the impacts of mine waste disposal, including deep-sea tailings, on tropical marine environments and this study presents the first account of this impact on deepwater fish communities. The Lihir gold mine in Papua New Guinea has deposited both excavated overburden and processed tailings slurry into the coastal environment since 1997. The abundances of fish species and trace metal concentrations in their tissues were compared between sites adjacent to and away from the mine. In this study (1999-2002), 975 fish of 98 species were caught. Significantly fewer fish were caught close to the mine than in neighbouring regions; the highest numbers were in regions distant from the mine. The catch rates of nine of the 17 most abundant species were lowest, and in three species were highest, close to the mine. There appears to be limited contamination in fish tissues caused by trace metals disposed as mine waste. Although arsenic (several species) and mercury (one species) were found in concentrations above Australian food standards. However, as in the baseline (pre-mine) sampling, it appears they are accumulating these metals mostly from naturally-occurring sources rather than the mine waste

  6. Analyzing structural variations along strike in a deep-water thrust belt

    Science.gov (United States)

    Totake, Yukitsugu; Butler, Robert W. H.; Bond, Clare E.; Aziz, Aznan

    2018-03-01

    We characterize a deep-water fold-thrust arrays imaged by a high-resolution 3D seismic dataset in the offshore NW Borneo, Malaysia, to understand the kinematics behind spatial arrangement of structural variations throughout the fold-thrust system. The seismic volume used covers two sub-parallel fold trains associated with a series of fore-thrusts and back-thrusts. We measured fault heave, shortening value, fold geometries (forelimb dip, interlimb angle and crest depth) along strike in individual fold trains. Heave plot on strike projection allows to identify individual thrust segments showing semi-elliptical to triangular to bimodal patterns, and linkages of these segments. The linkage sites are marked by local minima in cumulative heave. These local heave minima are compensated by additional structures, such as small imbricate thrusts and tight folds indicated by large forelimb dip and small interlimb angle. Complementary profiles of the shortening amount for the two fold trains result in smoother gradient of total shortening across the structures. We interpret this reflects kinematic interaction between two fold-thrust trains. This type of along-strike variation analysis provides comprehensive understanding of a fold-thrust system and may provide an interpretative strategy for inferring the presence of complex multiple faults in less well-imaged parts of seismic volumes.

  7. Oil release from Macondo well MC252 following the Deepwater Horizon accident.

    Science.gov (United States)

    Griffiths, Stewart K

    2012-05-15

    Oil flow rates and cumulative discharge from the BP Macondo Prospect well in the Gulf of Mexico are calculated using a physically based model along with wellhead pressures measured at the blowout preventer (BOP) over the 86-day period following the Deepwater Horizon accident. Parameters appearing in the model are determined empirically from pressures measured during well shut-in and from pressures and flow rates measured the preceding day. This methodology rigorously accounts for ill-characterized evolution of the marine riser, installation and removal of collection caps, and any erosion at the wellhead. The calculated initial flow rate is 67,100 stock-tank barrels per day (stbd), which decays to 54,400 stbd just prior to installation of the capping stack and subsequent shut-in. The calculated cumulative discharge is 5.4 million stock-tank barrels, of which 4.6 million barrels entered the Gulf. Quantifiable uncertainties in these values are -9.3% and +7.5%, yielding a likely total discharge in the range from 4.9 to 5.8 million barrels. Minimum and maximum credible values of this discharge are 4.6 and 6.2 million barrels. Alternative calculations using the reservoir and sea-floor pressures indicate that any erosion within the BOP had little affect on cumulative discharge.

  8. Simulating the effect of hydrate dissociation on wellhead stability during oil and gas development in deepwater

    Science.gov (United States)

    Li, Qingchao; Cheng, Yuanfang; Zhang, Huaiwen; Yan, Chuanliang; Liu, Yuwen

    2018-02-01

    It is well known that methane hydrate has been identified as an alternative resource due to its massive reserves and clean property. However, hydrate dissociation during oil and gas development (OGD) process in deep water can affect the stability of subsea equipment and formation. Currently, there is a serious lack of studies over quantitative assessment on the effects of hydrate dissociation on wellhead stability. In order to solve this problem, ABAQUS finite element software was used to develop a model and to evaluate the behavior of wellhead caused by hydrate dissociation. The factors that affect the wellhead stability include dissociation range, depth of hydrate formation and mechanical properties of dissociated hydrate region. Based on these, series of simulations were carried out to determine the wellhead displacement. The results revealed that, continuous dissociation of hydrate in homogeneous and isotropic formations can causes the non-linear increment in vertical displacement of wellhead. The displacement of wellhead showed good agreement with the settlement of overlying formations under the same conditions. In addition, the shallower and thicker hydrate formation can aggravate the influence of hydrate dissociation on the wellhead stability. Further, it was observed that with the declining elastic modulus and Poisson's ratio, the wellhead displacement increases. Hence, these findings not only confirm the effect of hydrate dissociation on the wellhead stability, but also lend support to the actions, such as cooling the drilling fluid, which can reduce the hydrate dissociation range and further make deepwater operations safer and more efficient.

  9. Seamount egg-laying grounds of the deep-water skate Bathyraja richardsoni.

    Science.gov (United States)

    Henry, L-A; Stehmann, M F W; De Clippele, L; Findlay, H S; Golding, N; Roberts, J M

    2016-08-01

    Highly localized concentrations of elasmobranch egg capsules of the deep-water skate Bathyraja richardsoni were discovered during the first remotely operated vehicle (ROV) survey of the Hebrides Terrace Seamount in the Rockall Trough, north-east Atlantic Ocean. Conductivity-temperature-depth profiling indicated that the eggs were bathed in a specific environmental niche of well-oxygenated waters between 4·20 and 4·55° C, and salinity 34·95-35·06, on a coarse to fine-grained sandy seabed on the seamount's eastern flank, whereas a second type of egg capsule (possibly belonging to the skate Dipturus sp.) was recorded exclusively amongst the reef-building stony coral Solenosmilia variabilis. The depths of both egg-laying habitats (1489-1580 m) provide a de facto refuge from fisheries mortality for younger life stages of these skates. © 2016 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles.

  10. Homing pigeons externally exposed to Deepwater Horizon crude oil change flight performance and behavior.

    Science.gov (United States)

    Perez, Cristina R; Moye, John K; Cacela, Dave; Dean, Karen M; Pritsos, Chris A

    2017-11-01

    The Deepwater Horizon oil spill was the largest in U.S. history, contaminating thousands of miles of coastal habitat and affecting the lives of many avian species. The Gulf of Mexico is a critical bird migration route area and migrants that were oiled but did not suffer mortality as a direct result of the spill faced unpredictable fates. This study utilized homing pigeons as a surrogate species for migratory birds to investigate the effects a single low level external oiling event has on the flight performance and behavior of birds flying repeated 161 km flights. Data from GPS data loggers showed that lightly oiled pigeons changed their flight paths, increased their flight durations by 2.6 fold, increased their flight distances by 28 km and subsequently decreased their route efficiencies. Oiled birds also exhibited reduced rate of weight gain between flights. Our data suggest that contaminated birds surviving the oil spill may have experienced flight impairment and reduced refueling abilities, likely reducing overall migration speed. Our findings contribute new information on how oil spills affect avian species, as the effects of oil on the flight behavior of long distance free-flying birds have not been previously described. Copyright © 2017 Elsevier Ltd. All rights reserved.

  11. Persistent impacts to the deep soft-bottom benthos one year after the Deepwater Horizon event.

    Science.gov (United States)

    Montagna, Paul A; Baguley, Jeffrey G; Cooksey, Cynthia; Hyland, Jeffrey L

    2017-03-01

    In fall 2010, several months after the Deepwater Horizon blowout was capped, zones of moderate and severe impacts to deep-sea, soft-bottom benthos were identified that together extended over an area of 172 km 2 . A subset of stations sampled in 2010 was resampled in May and June 2011, 10 to 11 months after the event, to determine whether the identified adverse effects were persisting. The design compared 20 stations from the combined moderate and severe impact zone to 12 stations in the reference zone that were sampled in both years. There were no statistically significant differences in contaminant concentrations between the impact and nonimpact zones from 2010 to 2011, which indicates contaminants persisted after 1 y. Whereas there were some signs of recovery in 2011 (particularly for the meiofauna abundance and diversity), there was evidence of persistent, statistically significant impacts to both macrofauna and meiofauna community structure. Macrofaunal taxa richness and diversity in 2011 were still 22.8% and 35.9% less, respectively, in the entire impact zone than in the surrounding nonimpact area, and meiofaunal richness was 28.5% less in the entire impact zone than in the surrounding area. The persistence of significant biodiversity losses and community structure change nearly 1 y after the wellhead was capped indicates that full recovery had yet to have occurred in 2011. Integr Environ Assess Manag 2017;13:342-351. © 2016 SETAC. © 2016 SETAC.

  12. Simulation of Deepwater Horizon oil plume reveals substrate specialization within a complex community of hydrocarbon degraders.

    Science.gov (United States)

    Hu, Ping; Dubinsky, Eric A; Probst, Alexander J; Wang, Jian; Sieber, Christian M K; Tom, Lauren M; Gardinali, Piero R; Banfield, Jillian F; Atlas, Ronald M; Andersen, Gary L

    2017-07-11

    The Deepwater Horizon (DWH) accident released an estimated 4.1 million barrels of oil and 10 10 mol of natural gas into the Gulf of Mexico, forming deep-sea plumes of dispersed oil droplets and dissolved gases that were largely degraded by bacteria. During the course of this 3-mo disaster a series of different bacterial taxa were enriched in succession within deep plumes, but the metabolic capabilities of the different populations that controlled degradation rates of crude oil components are poorly understood. We experimentally reproduced dispersed plumes of fine oil droplets in Gulf of Mexico seawater and successfully replicated the enrichment and succession of the principal oil-degrading bacteria observed during the DWH event. We recovered near-complete genomes, whose phylogeny matched those of the principal biodegrading taxa observed in the field, including the DWH Oceanospirillales (now identified as a Bermanella species), multiple species of Colwellia , Cycloclasticus , and other members of Gammaproteobacteria, Flavobacteria, and Rhodobacteria. Metabolic pathway analysis, combined with hydrocarbon compositional analysis and species abundance data, revealed substrate specialization that explained the successional pattern of oil-degrading bacteria. The fastest-growing bacteria used short-chain alkanes. The analyses also uncovered potential cooperative and competitive relationships, even among close relatives. We conclude that patterns of microbial succession following deep ocean hydrocarbon blowouts are predictable and primarily driven by the availability of liquid petroleum hydrocarbons rather than natural gases.

  13. Tracing the incorporation of carbon into benthic foraminiferal calcite following the Deepwater Horizon event.

    Science.gov (United States)

    Schwing, Patrick T; Chanton, Jeffrey P; Romero, Isabel C; Hollander, David J; Goddard, Ethan A; Brooks, Gregg R; Larson, Rebekka A

    2018-06-01

    Following the Deepwater Horizon (DWH) event in 2010, hydrocarbons were deposited on the continental slope in the northeastern Gulf of Mexico through marine oil snow sedimentation and flocculent accumulation (MOSSFA). The objective of this study was to test the hypothesis that benthic foraminiferal δ 13 C would record this depositional event. From December 2010 to August 2014, a time-series of sediment cores was collected at two impacted sites and one control site in the northeastern Gulf of Mexico. Short-lived radioisotopes ( 210 Pb and 234 Th) were employed to establish the pre-DWH, DWH, and post-DWH intervals. Benthic foraminifera (Cibicidoides spp. and Uvigerina spp.) were isolated from these intervals for δ 13 C measurement. A modest (0.2-0.4‰), but persistent δ 13 C depletion in the DWH intervals of impacted sites was observed over a two-year period. This difference was significantly beyond the pre-DWH (background) variability and demonstrated that benthic foraminiferal calcite recorded the depositional event. The longevity of the depletion in the δ 13 C record suggested that benthic foraminifera may have recorded the change in organic matter caused by MOSSFA from 2010 to 2012. These findings have implications for assessing the subsurface spatial distribution of the DWH MOSSFA event. Copyright © 2018 Elsevier Ltd. All rights reserved.

  14. Shape memory alloy actuated accumulator for ultra-deepwater oil and gas exploration

    Science.gov (United States)

    Patil, Devendra; Song, Gangbing

    2016-04-01

    As offshore oil and gas exploration moves further offshore and into deeper waters to reach hydrocarbon reserves, it is becoming essential for the industry to develop more reliable and efficient hydraulic accumulators to supply pressured hydraulic fluid for various control and actuation operations, such as closing rams of blowout preventers and controlling subsea valves on the seafloor. By utilizing the shape memory effect property of nitinol, which is a type of shape memory alloy (SMA), an innovative SMA actuated hydraulic accumulator prototype has been developed and successfully tested at Smart Materials and Structure Laboratory at the University of Houston. Absence of gas in the developed SMA accumulator prototype makes it immune to hydrostatic head loss caused by water depth and thus reduces the number of accumulators required in deep water operations. Experiments with a feedback control have demonstrated that the proposed SMA actuated accumulator can provide precisely regulated pressurized fluids. Furthermore the potential use of ultracapacitors along with an embedded system to control the electric power supplied to SMA allows this accumulator to be an autonomous device for deployment. The developed SMA accumulator will make deepwater oil extraction systems more compact and cost effective.

  15. Tsukamurella spongiae sp. nov., a novel actinomycete isolated from a deep-water marine sponge.

    Science.gov (United States)

    Olson, Julie B; Harmody, Dedra K; Bej, Asim K; McCarthy, Peter J

    2007-07-01

    A Gram-positive, rod-shaped, non-spore-forming bacterium (strain K362(T)) was isolated from a deep-water marine sponge collected off the coast of Curaçao in the Netherlands Antilles. On the basis of 16S rRNA gene sequence similarities, strain K362(T) was shown to belong to the genus Tsukamurella, being most closely related to Tsukamurella pulmonis (99.2 %), Tsukamurella tyrosinosolvens (98.9 %), Tsukamurella strandjordii (98.8 %), Tsukamurella pseudospumae (98.8 %) and Tsukamurella spumae (98.8 %). A combination of the substrate utilization patterns, the fatty acid and mycolic acid profiles and the DNA-DNA hybridization results supported the affiliation of strain K362(T) to the genus Tsukamurella and enabled the genotypic and phenotypic differentiation of strain K362(T) from the seven recognized Tsukamurella species. Strain K362(T) therefore represents a novel species of the genus Tsukamurella, for which the name Tsukamurella spongiae sp. nov. is proposed. The type strain is K362(T) (=DSM 44990(T)=NRRL B-24467(T)).

  16. The Deepwater Horizon oil spill and Gulf of Mexico shelf hypoxia

    Science.gov (United States)

    Rabalais, Nancy N.; Smith, Leslie M.; Turner, R. Eugene

    2018-01-01

    The oil/water/dispersant mixture from the 2010 Deepwater Horizon oil spill was juxtaposed on the Louisiana continental shelf with the annual development of oxygen-depleted bottom waters. There was uncertainty whether the oil from the spill might worsen the extent or severity of the seasonal hypoxic area formation in 2010. The surface and bottom water hydrocarbons in May were elevated compared to in June and July, while the bottom-water dissolved oxygen concentrations were higher in May and June compared to in July. The degradation of oil in the water column or sediments was not known. The results of an empirical orthogonal functions (EOF) analysis of the progression of hypoxia development in May, June and July 2010, and an analysis of conditions in July compared to a 27-year background database, indicated no difference in oxygen concentrations for May, June or July 2010, with or without oil data included, nor any difference in July 2010 compared to other years. The analysis instead indicated that, in all years compared, the hypoxic area increased with higher river discharge, higher nitrate-N load, an easterly (westward) wind and reduced wind speed. Although the analyses did not demonstrate that the oil spill affected, or did not affect, the size of the 2010 hypoxic zone, there was evidence that the 2010 hypoxia season did not differ from the long-term record.

  17. Where the oil from surface and subsurface plumes deposited during/after Deepwater Horizon oil spill?

    Science.gov (United States)

    Yan, B.

    2016-02-01

    The Deepwater Horizon (DwH) oil spill released an estimated 4.9 million barrels (about 200 million gallons) of crude oil into the Gulf of Mexico between April 20, 2010 and July 15, 2010. Though Valentine et al. has linked the elevated oil components in some sediments with the subsurface plume, the sites with fallout from the ocean surface plume has not been identified. This piece of information is critical not only for a comprehensive scientific understanding of the ecosystem response and fate of spill-related pollutants, but also for litigation purposes and future spill response and restoration planning. In this study we focus on testing the hypothesis that marine snow from the surface plume were deposited on the sea floor over a broad area. To do so, we use publicly available data generated as part of the ongoing Natural Resource Damage Assessment (NRDA) process to assess the spatial distribution of petroleum hydrocarbons in the water column and deep-ocean sediments of the Gulf of Mexico. Sensitive hydrocarbon markers are used to differentiate hydrocarbons from surface plume, deep subsurface plume, and in-situ burning. Preliminary results suggest the overlapping but different falling sites of these plumes and the sedimentation process was controlled by various biological, chemical, and physical factors.

  18. Sedimentological Characterization of a Deepwater Methane Hydrate Reservoir in Green Canyon 955, Northern Gulf of Mexico

    Science.gov (United States)

    Meazell, K.; Flemings, P. B.

    2017-12-01

    Grain size is a controlling factor of hydrate saturation within a Pleistocene channel-levee system investigated by the UT-GOM2-1 expedition within the deepwater northern Gulf of Mexico. Laser diffraction and settling experiments conducted on sediments from 413-440 meters below the seafloor reveal the presence of two interbedded lithologic units, identified as a silty sand and a clayey silt, according Shepard's classification system. The sand-rich lithofacies has low density and high p-wave velocity, suggesting a high degree of hydrate saturation. Conversely, the clay and silt dominated lithofacies is characterized by a higher density and low p-wave velocity, suggesting low hydrate saturation. The sand-rich lithofacies is well-sorted and displays abundant ripple lamination, indicative of deposition within a high-energy environment. The clayey-silt is poorly-sorted and lacks sedimentary structures. The two lithofacies are interbedded throughout the reservoir unit; however, the relative abundance of the sand-rich lithofacies increases with depth, suggesting a potential decrease in flow energy or sediment flux over time, resulting in the most favorable reservoir properties near the base of the unit.

  19. Investigation of heave response of the deepwater octagonal FDPSO using various heave plate configurations

    Science.gov (United States)

    Yu, Chenfang; Hu, Zhiqiang; Wang, Shisheng

    2017-12-01

    Heave plates can be employed to control undesirable heave motion amplitudes of the deepwater octagonal Floating, Drilling, Production, Storage, and Offloading (FDPSO) platform. Numerical simulations and model tests were applied to analyze and investigate the hydrodynamic response and the feasibility of the heave plate configurations. The diameter and the depth below the free surface of a single-layer heave plate, as well as the spacing of two-layer heave plates, were considered as the primary variables when studying the effect of heave plates on FDPSO hydrodynamics. The analysis results indicate that the heave plate diameter significantly affects the heave hydrodynamics, and heave performance could be improved with an increased diameter. In addition, increasing the depth below the free surface of a single-layer heave plate does not effectively suppress the heave motion within the range of draft depths tested. The target FDPSO obtained better heave characteristics with increased spacing between the two-layer heave plates. Furthermore, the global performances of the octagonal FDPSO with these typical heave plate configurations were comparatively analyzed. The results indicate that from a hydrodynamic point of view, the single-layer heave plate configuration has an advantage over the two-layer heave plate configuration.

  20. Spectrum response estimation for deep-water floating platforms via retardation function representation

    Science.gov (United States)

    Liu, Fushun; Liu, Chengcheng; Chen, Jiefeng; Wang, Bin

    2017-08-01

    The key concept of spectrum response estimation with commercial software, such as the SESAM software tool, typically includes two main steps: finding a suitable loading spectrum and computing the response amplitude operators (RAOs) subjected to a frequency-specified wave component. In this paper, we propose a nontraditional spectrum response estimation method that uses a numerical representation of the retardation functions. Based on estimated added mass and damping matrices of the structure, we decompose and replace the convolution terms with a series of poles and corresponding residues in the Laplace domain. Then, we estimate the power density corresponding to each frequency component using the improved periodogram method. The advantage of this approach is that the frequency-dependent motion equations in the time domain can be transformed into the Laplace domain without requiring Laplace-domain expressions for the added mass and damping. To validate the proposed method, we use a numerical semi-submerged pontoon from the SESAM. The numerical results show that the responses of the proposed method match well with those obtained from the traditional method. Furthermore, the estimated spectrum also matches well, which indicates its potential application to deep-water floating structures.

  1. Prolonged Financial Distress After the Deepwater Horizon Oil Spill Predicts Behavioral Health.

    Science.gov (United States)

    Buckingham-Howes, Stacy; Holmes, Katherine; Glenn Morris, J; Grattan, Lynn M

    2018-03-13

    The economic impact of disasters is well known; however, the link between financial loss and behavioral health problems is unknown. Participants included 198 adults of ages 21 to 82, living within 10 miles of the Gulf Coast during the Deepwater Horizon Oil Spill and were involved in the fishing, harvesting, seafood processing, or service/tourism industries. The functional impact of financial resource loss at 2.5 years post spill was measured using the 26-item Financial Life Events Checklist (FLEC). Individuals responded to financial distress by reducing social events and utility bills and changing food-shopping habits. The FLEC significantly predicted higher drug use (Drug Abuse Screening Test), alcohol use (Alcohol Use Disorders Identification Test), mood problems (Profile of Mood States), and depressive symptoms (Beck Depression Inventory II) (p values ≤ 0.05) 4.5 years after the spill. This preliminary study supports the notion that the functional impact of financial loss has a long-term impact on behavioral health after an oil spill.

  2. Bioassay of Lake Onego bottom sediments toxicity based on their chemical composition and deepwater macrozoobenthos state

    Directory of Open Access Journals (Sweden)

    Kalinkina Nataliya Michailovna

    2017-03-01

    Full Text Available The bioassay of the toxicity of bottom sediments sampled in different areas of Lake Onega was carried out by crustaceans biotesting (Ceriodaphnia affinis Lillijeborg. It was shown that in the most areas of Lake Onega there are non-toxic bottom sediments. Toxic bottom sediments were found in Kondopogskaya Bay, intensively polluted with pulp-and-paper mill wastewaters. For the first time in the deep central part of Lake Onega the area was revealed where the toxic bottom sediments contain a high content of iron, manganese and other trace elements typical for the central areas of the lake. The mapping of the bottom of Lake Onega was accomplished, and three zones were identified based on the analysis of the data concerning the chemical composition of bottom sediments, bioassay toxicity data and the results of the deepwater macrozoobenthos assessment. For each zone the parameters of the main groups of benthos (Amphipoda, Oligochaeta, Chironomidae were defined. The first zone is located in the area of intensive anthropogenic influence (Kondopogskaya Bay, Petrozavodskaya Bay, Povenets Bay, Kizhi Skerries. The second zone is located mostly in the deep part of Petrozavodskaya Bay, where the most intensive development of amphipods is observed. The third area is identified for the first time: it is located in the central deep part of Lake Onega, where the communities of macrozoobenthos are limited by a natural toxic factor.

  3. Technical Monitoring System for a New Part of Gdańsk Deepwater Container Terminal

    Directory of Open Access Journals (Sweden)

    Miśkiewicz Mikołaj

    2017-04-01

    Full Text Available Development strategy for the port of Gdańsk assumes that , up to 2027, it will become the main transport centre in the Baltic Sea region. To this end , for many years work has been carried out to facilitate access to the port both by sea and land. One of the elements of extension of the port is the building of another terminal of Deepwater Container Terminal, Gdańsk. In this task, geotechnical operations aimed at appropriate preparation of subgrade for storage of containers and operation of cranes, have been especially important. Effectiveness of the assumed design solution of land-side girder for gantry crane has been verified by means of a technical monitoring system. This paper presents main elements of design the land-side girder of a new quay of the container terminal in Gdańsk, together with its computational analysis, as well as the results collected during a few months of observation, which have revealed real work of monitored elements.

  4. La noción de campo en Kurt Lewin y Pierre Bourdieu: un análisis comparativo

    Directory of Open Access Journals (Sweden)

    José Manuel Fernández Fernández

    2009-01-01

    Full Text Available La noción de campo desempeñó un papel central en los proyectos científicos de Kurt Lewin y Pierre Bourdieu. En este artículo hacemos un análisis comparativo del uso teórico y metodológico que hicieron de este concepto en la producción de su fecunda obra en los campos de la psicología y de la sociología, respectivamente. Para ello nos hemos centrado en cinco cuestiones cruciales que de modo explícito plantearon estos dos investigadores en la elaboración de su teoría de campo: la ruptura con las objetivaciones parciales, la construcción del objeto, la dinámica interna de los campos, la delimitación de sus fronteras y la representación matemática de los hechos psicológicos y sociológicos. Concluimos con una síntesis en la que ponemos de relieve algunas importantes coincidencias y diferencias en la teoría de campo de Kurt Lewin y Pierre Bourdieu. Ambos le asignaron funciones epistemológicas similares, pero podemos apreciar en Lewin un mayor mimetismo respecto a la noción de campo proveniente de la física y sus posibilidades de formulación matemática, mientras que en Bourdieu la noción de campo es inseparable de las de habitus y capital, lo que facilita un análisis más integrado de los fenómenos micro y macrosociales, una apreciación más sofisticada de sus dimensiones temporales y criterios más precisos para establecer los límites de un campo.

  5. Lentes progressivas: análise dos campos intermediário e de perto por deflexometria

    Directory of Open Access Journals (Sweden)

    Celso Marcelo Cunha

    2013-02-01

    Full Text Available OBJETIVO: Avaliar por deflexometria as diferentes regiões das lentes progressivas e determinar as áreas dos campos de visão intermediário e de perto. MÉTODOS: Foram incluídas vinte e duas lentes progressivas com poder +1,00 DE para longe e duas adições diferentes (adição 1,00 e 2,00, 11 de cada. Mediram-se as áreas dos campos intermediário e de perto entre as isoastigmáticas de 0,5 DC. RESULTADOS: Encontraram-se diferenças significativas entre as áreas dos campos intermediário e de perto das lentes estudadas. Entre a área do campo intermediário e a adição observou-se correlação inversa; entre a área do campo intermediário e a extensão vertical do corredor encontrou-se correlação direta. CONCLUSÃO: Com esses dados permitem-se recomendar as lentes de acordo com o campo de maior necessidade visual de cada usuário.

  6. Monitoring of perfluoroalkyl substances in the Ebro and Guadalquivir River basins (Spain)

    Science.gov (United States)

    Lorenzo, Maria; Campo, Julian; Andreu, Vicente; Pico, Yolanda; Farre, Marinella; Barcelo, Damia

    2015-04-01

    Relevant concentrations of a broad range of pollutants have been found in Spanish Mediterranean River basins, as consequence of anthropogenic pressures and overexploitation (Campo et al., 2014). In this study, the occurrence and sources of 21 perfluoroalkyl substances (PFASs) were determined in water and sediment of the Ebro and Guadalquivir River basins (Spain). PFASs are persistent, bio-accumulative and toxic, which make them a hazard to human health and wildlife. The Ebro and Guadalquivir Rivers are the two most important rivers of Spain. They are representative examples of Mediterranean rivers heavily managed, and previous researches have reported their high pesticide contamination (Masiá et al., 2013). Analytes were extracted by solid phase extraction (SPE) and determined by liquid chromatography coupled to tandem mass spectrometry (LC/MS-MS). In water samples, from 21 analytes screened, 11 were found in Ebro samples and 9 in Guadalquivir ones. In both basins, the most frequents were PFBA, PFPeA, PFHxS and PFOS. Maximum concentration was detected for PFBA, with 251.3 ng L-1 in Ebro and 742.9 ng L-1 in Guadalquivir. Regarding the sediment samples, 8 PFASs were detected in those coming from Ebro basin and 9 in those from Guadalquivir. The PFASs most frequently detected were PFBA, PFPeA, PFOS and PFBS. Maximum concentration in Ebro samples was detected for PFOA, with 32.4 ng g-1 dw, and in Guadalquivir samples for PFBA with 63.8 ng g-1 dw. Ubiquity of these compounds in the environment was proved with high PFAS concentration values detected in upper parts of the rivers. Results confirm that most of the PFASs are only partially eliminated during the secondary treatment suggesting that they can be a focal point of contamination to the rivers where they can bio-accumulate and produce adverse effects on wildlife and humans. Acknowledgment The Spanish Ministry of Economy and Competitiveness has supported this work through the projects SCARCE-CSD2009-00065, CGL2011

  7. Alternatives for optimization of the heavy oil production in onshore marginal fields in Brazil; Alternativas para otimizacao de producao de oleos pesados em campos marginais terrestres no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Arlindo Antonio de [PETROBRAS, Rio de Janeiro, RJ (Brazil); Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-graduacao em Energia

    2004-07-01

    The intention of this article is to present possible alternatives for optimization of the production of heavy oils in marginal onshore fields in Brazil. The use of gas micro-turbines, the application of SAGD (Steam Assisted Gravity Drainage), the use of the drilling technique for river crossing and to a proposal for a new system of the rig less workovers are approached. The focus is the search of the increment of the production, the increase of the factor of final recovery, the global reduction of the costs and the minimization of the environmental impacts. The volumes of heavy oils in Campos Basin and in national onshore areas they are significant and, therefore, techniques and procedures that optimize its production are strategic. In the Brazilian Northeast there are a series of small fields of low productivity, in general of heavy oils, some in production there are more than twenty years that need of a reduction of the cost for barrel to continue producing. A realistic and responsible posture with the use of probabilistics concepts, techniques of engineering of the reliability, adoption of 'tolerable' levels of risk (associate to the return), attendance on line of the sceneries, premises and criteria, (proposal of the methodology GERISK), are relevant factors that can propitiate not only the reduction of the cost for produced barrel as well as to take the an increase of the factor of final recovery of the field. (author)

  8. Alternatives for optimization of the heavy oil production in onshore marginal fields in Brazil; Alternativas para otimizacao de producao de oleos pesados em campos marginais terrestres no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Arlindo Antonio de [PETROBRAS, Rio de Janeiro, RJ (Brazil); Santos, Edmilson Moutinho dos [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Programa Interunidades de Pos-graduacao em Energia

    2004-07-01

    The intention of this article is to present possible alternatives for optimization of the production of heavy oils in marginal onshore fields in Brazil. The use of gas micro-turbines, the application of SAGD (Steam Assisted Gravity Drainage), the use of the drilling technique for river crossing and to a proposal for a new system of the rig less workovers are approached. The focus is the search of the increment of the production, the increase of the factor of final recovery, the global reduction of the costs and the minimization of the environmental impacts. The volumes of heavy oils in Campos Basin and in national onshore areas they are significant and, therefore, techniques and procedures that optimize its production are strategic. In the Brazilian Northeast there are a series of small fields of low productivity, in general of heavy oils, some in production there are more than twenty years that need of a reduction of the cost for barrel to continue producing. A realistic and responsible posture with the use of probabilistics concepts, techniques of engineering of the reliability, adoption of 'tolerable' levels of risk (associate to the return), attendance on line of the sceneries, premises and criteria, (proposal of the methodology GERISK), are relevant factors that can propitiate not only the reduction of the cost for produced barrel as well as to take the an increase of the factor of final recovery of the field. (author)

  9. Deep-water chemosynthetic ecosystem research during the census of marine life decade and beyond: a proposed deep-ocean road map.

    Directory of Open Access Journals (Sweden)

    Christopher R German

    Full Text Available The ChEss project of the Census of Marine Life (2002-2010 helped foster internationally-coordinated studies worldwide focusing on exploration for, and characterization of new deep-sea chemosynthetic ecosystem sites. This work has advanced our understanding of the nature and factors controlling the biogeography and biodiversity of these ecosystems in four geographic locations: the Atlantic Equatorial Belt (AEB, the New Zealand region, the Arctic and Antarctic and the SE Pacific off Chile. In the AEB, major discoveries include hydrothermal seeps on the Costa Rica margin, deepest vents found on the Mid-Cayman Rise and the hottest vents found on the Southern Mid-Atlantic Ridge. It was also shown that the major fracture zones on the MAR do not create barriers for the dispersal but may act as trans-Atlantic conduits for larvae. In New Zealand, investigations of a newly found large cold-seep area suggest that this region may be a new biogeographic province. In the Arctic, the newly discovered sites on the Mohns Ridge (71 °N showed extensive mats of sulfur-oxidisng bacteria, but only one gastropod potentially bears chemosynthetic symbionts, while cold seeps on the Haakon Mossby Mud Volcano (72 °N are dominated by siboglinid worms. In the Antarctic region, the first hydrothermal vents south of the Polar Front were located and biological results indicate that they may represent a new biogeographic province. The recent exploration of the South Pacific region has provided evidence for a sediment hosted hydrothermal source near a methane-rich cold-seep area. Based on our 8 years of investigations of deep-water chemosynthetic ecosystems worldwide, we suggest highest priorities for future research: (i continued exploration of the deep-ocean ridge-crest; (ii increased focus on anthropogenic impacts; (iii concerted effort to coordinate a major investigation of the deep South Pacific Ocean - the largest contiguous habitat for life within Earth's biosphere, but

  10. Deep-water chemosynthetic ecosystem research during the census of marine life decade and beyond: a proposed deep-ocean road map.

    Science.gov (United States)

    German, Christopher R; Ramirez-Llodra, Eva; Baker, Maria C; Tyler, Paul A

    2011-01-01

    The ChEss project of the Census of Marine Life (2002-2010) helped foster internationally-coordinated studies worldwide focusing on exploration for, and characterization of new deep-sea chemosynthetic ecosystem sites. This work has advanced our understanding of the nature and factors controlling the biogeography and biodiversity of these ecosystems in four geographic locations: the Atlantic Equatorial Belt (AEB), the New Zealand region, the Arctic and Antarctic and the SE Pacific off Chile. In the AEB, major discoveries include hydrothermal seeps on the Costa Rica margin, deepest vents found on the Mid-Cayman Rise and the hottest vents found on the Southern Mid-Atlantic Ridge. It was also shown that the major fracture zones on the MAR do not create barriers for the dispersal but may act as trans-Atlantic conduits for larvae. In New Zealand, investigations of a newly found large cold-seep area suggest that this region may be a new biogeographic province. In the Arctic, the newly discovered sites on the Mohns Ridge (71 °N) showed extensive mats of sulfur-oxidisng bacteria, but only one gastropod potentially bears chemosynthetic symbionts, while cold seeps on the Haakon Mossby Mud Volcano (72 °N) are dominated by siboglinid worms. In the Antarctic region, the first hydrothermal vents south of the Polar Front were located and biological results indicate that they may represent a new biogeographic province. The recent exploration of the South Pacific region has provided evidence for a sediment hosted hydrothermal source near a methane-rich cold-seep area. Based on our 8 years of investigations of deep-water chemosynthetic ecosystems worldwide, we suggest highest priorities for future research: (i) continued exploration of the deep-ocean ridge-crest; (ii) increased focus on anthropogenic impacts; (iii) concerted effort to coordinate a major investigation of the deep South Pacific Ocean - the largest contiguous habitat for life within Earth's biosphere, but also the

  11. Novel techniques and insights into the deployment of pop-up satellite archival tags on a small-bodied deep-water chondrichthyan

    Science.gov (United States)

    Shipley, Oliver N.; Howey, Lucy A.; Tolentino, Emily R.; Jordan, Lance K. B.; Brooks, Edward J.

    2017-01-01

    Acquiring movement data for small-bodied, deep-water chondrichthyans is challenged by extreme effects of capture and handling stress, and post-release predation, however, it is urgently required to examine important fisheries interactions and assess the ecological role of these species within deep-water food webs. Here we suggest a novel release-cage mechanism to deploy pop-up satellite archival tags, as well as present vertical habitat data for a data-deficient, small-bodied, deep-water bycatch species, the Cuban dogfish (Squalus cubensis). Data were gathered from seven of eight High Rate X-Tags deployed on mature Cuban dogfish in the Exuma Sound, The Bahamas. Recovery periods appeared variable between individuals and are likely driven by capture-and-handling stress and tag burden. Application of the cross-correlation function to time-series depth and temperature data indicated three of the seven individuals suffered mortality through predation, which occurred during daytime, and suggests Cuban dogfish may constitute a proportion of deep-water apex predator diet in the Exuma Sound. Two animals were successfully released via a novel release-cage mechanism and displayed either no, or rapid (<15 mins) vertically stationary recovery periods and were not consumed by predators; data for these individuals were recorded for the entire deployment duration (14 days). Vertical habitat data suggests Cuban dogfish are diel-vertical migrators, similar to other deep-water taxa, and exhibit a relatively broad temperature and depth range, which may be driven by preference for specific bathymetric structures. These techniques provide an important first step into acquiring and presenting vertical habitat data for small-bodied, deep-water chondrichthyans, which can be directly applied to fisheries and ecosystem-based management approaches.

  12. Integrated Hydrographical Basin Management. Study Case - Crasna River Basin

    Science.gov (United States)

    Visescu, Mircea; Beilicci, Erika; Beilicci, Robert

    2017-10-01

    Hydrographical basins are important from hydrological, economic and ecological points of view. They receive and channel the runoff from rainfall and snowmelt which, when adequate managed, can provide fresh water necessary for water supply, irrigation, food industry, animal husbandry, hydrotechnical arrangements and recreation. Hydrographical basin planning and management follows the efficient use of available water resources in order to satisfy environmental, economic and social necessities and constraints. This can be facilitated by a decision support system that links hydrological, meteorological, engineering, water quality, agriculture, environmental, and other information in an integrated framework. In the last few decades different modelling tools for resolving problems regarding water quantity and quality were developed, respectively water resources management. Watershed models have been developed to the understanding of water cycle and pollution dynamics, and used to evaluate the impacts of hydrotechnical arrangements and land use management options on water quantity, quality, mitigation measures and possible global changes. Models have been used for planning monitoring network and to develop plans for intervention in case of hydrological disasters: floods, flash floods, drought and pollution. MIKE HYDRO Basin is a multi-purpose, map-centric decision support tool for integrated hydrographical basin analysis, planning and management. MIKE HYDRO Basin is designed for analyzing water sharing issues at international, national and local hydrographical basin level. MIKE HYDRO Basin uses a simplified mathematical representation of the hydrographical basin including the configuration of river and reservoir systems, catchment hydrology and existing and potential water user schemes with their various demands including a rigorous irrigation scheme module. This paper analyzes the importance and principles of integrated hydrographical basin management and develop a case

  13. Tectonic control on turbiditic sedimentation: The Late Cretaceous-Eocene successions in the Sinop-Boyabat Basin of north-central Turkey

    Energy Technology Data Exchange (ETDEWEB)

    Janbu, Nils Erik

    2004-07-01

    The aim of this study: Tectonics is widely recognized by geologists as the single most important factor controlling the development, filling and deformation of sedimentary basins. In general terms, the role of tectonics seems rather ''obvious'' to most geologists, because we know reasonably well as what tectonics ''can do'' as the agent of structural deformation. Therefore, the role of tectonics is often invoked as a kind of ballpark variable - as the obvious cause of ''subsidence'' or ''uplift'' - and seems to some authors even too obvious to mention. Relatively little attempt has been in sedimentological and stratigraphic studies to recognize as to what effects exactly the tectonic activity had on sedimentation in a particular basin. The principal aim of the present study has been to improve our understanding of how tectonic activity can affect deep-water turbiditic sedimentation in a particular basin, including its ''external'' influences (basin geometry, basin-margin configuration, sediment source/supply and relative sea-level change) and ''internal'' effects (basin-floor subsidence, seafloor deformation). Foreland basins are some of the most active tectonically, and the Sinop- Boyabat Basin is a fascinating case of a rift converted into a foreland basin and increasingly deformed. Summary of papers: The main part of the field study, concerned with the sedimentology and facies analysis of the turbiditic succession, is summarized in Papers 1-3, which put special emphasis on the physical character and morphodynamic evolution of the depositional systems and on the tectonic control on their development. Paper 4 focuses on the frequency distribution of bed thickness data collected by detailed logging of various turbiditic assemblages: siliciclastic deposits of nonchannelized currents (lobe and overbank facies); siliciclastic deposits of poorly

  14. Tectonic control on turbiditic sedimentation: The Late Cretaceous-Eocene successions in the Sinop-Boyabat Basin of north-central Turkey

    Energy Technology Data Exchange (ETDEWEB)

    Janbu, Nils Erik

    2004-07-01

    The aim of this study: Tectonics is widely recognized by geologists as the single most important factor controlling the development, filling and deformation of sedimentary basins. In general terms, the role of tectonics seems rather ''obvious'' to most geologists, because we know reasonably well as what tectonics ''can do'' as the agent of structural deformation. Therefore, the role of tectonics is often invoked as a kind of ballpark variable - as the obvious cause of ''subsidence'' or ''uplift'' - and seems to some authors even too obvious to mention. Relatively little attempt has been in sedimentological and stratigraphic studies to recognize as to what effects exactly the tectonic activity had on sedimentation in a particular basin. The principal aim of the present study has been to improve our understanding of how tectonic activity can affect deep-water turbiditic sedimentation in a particular basin, including its ''external'' influences (basin geometry, basin-margin configuration, sediment source/supply and relative sea-level change) and ''internal'' effects (basin-floor subsidence, seafloor deformation). Foreland basins are some of the most active tectonically, and the Sinop- Boyabat Basin is a fascinating case of a rift converted into a foreland basin and increasingly deformed. Summary of papers: The main part of the field study, concerned with the sedimentology and facies analysis of the turbiditic succession, is summarized in Papers 1-3, which put special emphasis on the physical character and morphodynamic evolution of the depositional systems and on the tectonic control on their development. Paper 4 focuses on the frequency distribution of bed thickness data collected by detailed logging of various turbiditic assemblages: siliciclastic deposits of nonchannelized currents (lobe and overbank facies); siliciclastic deposits of poorly confined, aggradational channels; siliciclastic deposits of well-defined sinuous channels nested into channel complexes; and

  15. Reproductive traits of tropical deep-water pandalid shrimps ( Heterocarpus ensifer) from the SW Gulf of Mexico

    Science.gov (United States)

    Briones-Fourzán, Patricia; Barradas-Ortíz, Cecilia; Negrete-Soto, Fernando; Lozano-Álvarez, Enrique

    2010-08-01

    Heterocarpus ensifer is a tropical deep-water pandalid shrimp whose reproductive features are poorly known. We examined reproductive traits of a population of H. ensifer inhabiting the continental slope (311-715 m in depth) off the Yucatan Peninsula, Mexico (SW Gulf of Mexico). Size range of the total sample ( n=816) was 10.4-38.9 mm carapace length. Females grow larger than males, but both sexes mature at 57% of their maximum theoretical size and at ˜30% of their total lifespan. Among adult females, the proportion of ovigerous females was high in all seasons, indicating year-round reproduction. Most females carrying embryos in advanced stages of development had ovaries in advanced stages of maturation, indicating production of successive spawns. In the autumn, however, the proportion of ovigerous females and the condition index of these females were lower compared to other seasons. This pattern potentially reflects a reduction in food resources following the summer minimum in particulate organic carbon flux to the deep benthos, as reported in previous studies. Spawns consisting of large numbers (16024±5644, mean±SD) of small eggs (0.045±0.009 mm 3) are consistent with extended planktotrophic larval development, an uncommon feature in deep-water carideans. Egg number increased as a power function of female size but with substantial variability, and egg size varied widely within and between females. There was no apparent trade-off between egg number and egg size and neither of these two variables was influenced by female condition. These results indicate iteroparity and a high and variable reproductive effort, reflecting a reproductive strategy developed to compensate for high larval mortality. The present study provides a baseline to compare reproductive traits between Atlantic populations of this tropical deep-water pandalid.

  16. The discovery of deep-water seagrass meadows in a pristine Indian Ocean wilderness revealed by tracking green turtles.

    Science.gov (United States)

    Esteban, N; Unsworth, R K F; Gourlay, J B Q; Hays, G C

    2018-03-21

    Our understanding of global seagrass ecosystems comes largely from regions characterized by human impacts with limited data from habitats defined as notionally pristine. Seagrass assessments also largely focus on shallow-water coastal habitats with comparatively few studies on offshore deep-water seagrasses. We satellite tracked green turtles (Chelonia mydas), which are known to forage on seagrasses, to a remote, pristine deep-water environment in the Western Indian Ocean, the Great Chagos Bank, which lies in the heart of one of the world's largest marine protected areas (MPAs). Subsequently we used in-situ SCUBA and baited video surveys to survey the day-time sites occupied by turtles and discovered extensive monospecific seagrass meadows of Thalassodendron ciliatum. At three sites that extended over 128 km, mean seagrass cover was 74% (mean range 67-88% across the 3 sites at depths to 29 m. The mean species richness of fish in seagrass meadows was 11 species per site (mean range 8-14 across the 3 sites). High fish abundance (e.g. Siganus sutor: mean MaxN.site -1  = 38.0, SD = 53.7, n = 5) and large predatory shark (Carcharhinus amblyrhynchos) (mean MaxN.site -1  = 1.5, SD = 0.4, n = 5) were recorded at all sites. Such observations of seagrass meadows with large top predators, are limited in the literature. Given that the Great Chagos Bank extends over approximately 12,500 km 2 and many other large deep submerged banks exist across the world's oceans, our results suggest that deep-water seagrass may be far more abundant than previously suspected. Copyright © 2018 The Author(s). Published by Elsevier Ltd.. All rights reserved.

  17. The importance of the stimulation vessels in the Brazilian offshore basins: a history of technological evolution; A importancia dos barcos de estimulacao em bacias offshore brasileiras: uma historia de evolucao tecnologica

    Energy Technology Data Exchange (ETDEWEB)

    Torres, Ricardo S.; Prata, Fernando Gaspar M.; Dean, Gregory D. [BJ Services do Brasil Ltda., RJ (Brazil)

    2004-07-01

    The Campos Basin is known as one of the most challenging deep water basins in the world. Currently there are thirty-seven platforms, more than a thousand oil wells, and about 4200 kilometers of submarine pipelines, having produced more than 1,2 billion barrels of oil per year and 15,7 million cubic meters of gas per day. The Campos Basin is responsible for more than 80% of Brazil's national production. Brazil intends to produce 2,2 million barrels of oil per day by 2007, when it will reach self-sufficiency. Therefore, the continued development of the offshore basins, such as Campos, Santos and Espirito Santo will be critical to meet this goal. In this context, the technological evolution of the vessels that render stimulation services is of fundamental importance to improve job quality, reduce time, protect with the environment, enable efficient communication, and ensure operational viability of new techniques. This paper reports on the history of this vessels, describing and illustrating new and state-of-the-art technology, historical cases of pioneering operations, data transmission in real time and the benefits for offshore operators with a global vision. (author)

  18. Drainage basins features and hydrological behaviour river Minateda basin

    International Nuclear Information System (INIS)

    Alonso-Sarria, F.

    1991-01-01

    Nine basin variables (shape, size and topology) have been analyzed in four small basins with non-permanent run off (SE of Spain). These geomorphological variables have been selected for their high correlation with the Instantaneous unit hydrograph parameters. It is shown that the variables can change from one small basin to another within a very short area; because of it, generalizations about the behaviour of the run off are not possible. In conclusion, it is stated that the variations in geomorphological aspects between different basins, caused mainly by geological constraints, are a very important factor to be controlled in a study of geoecological change derived from climatic change

  19. LA INEQUIDAD EN EL CAMPO DE LA SALUD PUBLICA EN AMERICA LATINA: UNA CUESTION CRUCIAL

    Directory of Open Access Journals (Sweden)

    Bernardo Kliksberg

    2002-08-01

    Full Text Available América Latina es considerada la región más desigual del planeta. Es el Continente donde, según múltiples fuentes, las polarizaciones son mayores en diversos campos, y el acceso a las oportunidades es marcadamente disímil para los diferentes sectores sociales. ¿Cómo impacta la inequidad latinoamericana el fundamental campo de la salud? ¿Qué problemas determina en esta área decisiva de la vida de las sociedades, y qué obstáculos y trabas pone al avance de los esfuerzos para mejorar la salud?.A pesar de su clara relevancia, este tema ha sido limitadamente puesto a foco. El objetivo de este trabajo es llamar la atención sobre el mismo, y contribuir a estimular este debate tan necesario. Para ello se subraya, en primer término, el papel central de la salud para el desarrollo, se reseñan las amplias brechas que existen, a pesar de ello, a nivel mundial entre países, y a su interior, se encaran ciertos difundidos mitos sobre cómo superar los problemas en salud, se exploran algunos de los principales impactos de la desigualdad de América Latina sobre aspectos básicos del campo de la salud y, finalmente, se sugieren algunas líneas de la gran tarea por realizar para enfrentar el peso de la inequidad sobre la salud pública.

  20. Pesquisa de campo qualitativa: uma vivência em geografia humanista

    Directory of Open Access Journals (Sweden)

    Rita Jaqueline Nogueira Chiapetti

    2011-01-01

    Full Text Available O objetivo deste artigo é descrever a experiência de uma pesquisa de campo qualitativa em Geografia, com uma abordagem humanista. A pesquisa de campo foi feita no município de Itacaré, sul do estado da Bahia, com o propósito compreender como os sujeitos de Itacaré percebem o rio das Contas, qual é o significado do rio para eles. Como método de pesquisa de campo, optamos pela história oral e pelas técnicas da entrevista, da observação e, ainda, pelo registro de paisagens através de fotografias. A nossa presença em Itacaré foi importante para o êxito da pesquisa porque pudemos conhecer melhor as pessoas e o seu cotidiano, fato que contribuiu para a qualidade das informações contidas nas 41 entrevistas feitas. Também, essa convivência com as pessoas do lugar foi uma grande experiência vivida na perspectiva da Geografia Humanista. Abstract QUALITATIVE FIELD RESEARCH: EXPERIENCE IN HUMANISTIC GEOGRAPHY This paper aims at describing the experience of a qualitative field research in Geography under a humanistic approach. The field research was carried out in Itacaré, located in the south of Bahia state, aiming at understanding how the individuals from Itacaré perceive Rio das Contas, what the river means to them. We have chosen oral history as field research method and the techniques of oral interview, observation and the record of landscapes through photography. Our presence in Itacaré was critical for the field research’s success as we could get to know better the people and their everyday life, which contributed for the quality of the information contained in the 41 oral interviews collected. Also, staying with these people was a valuable experience under the Humanistic Geography perspective.

  1. Plant Biodiversity Drivers in Brazilian Campos Rupestres: Insights from Phylogenetic Structure.

    Science.gov (United States)

    Zappi, Daniela C; Moro, Marcelo F; Meagher, Thomas R; Nic Lughadha, Eimear

    2017-01-01

    Old, climate-buffered infertile landscapes (Ocbils) have attracted increasing levels of interest in recent years because of their exceptionally diverse plant communities. Brazil's campos rupestres (rupestrian grasslands) are home to almost 15% of Brazil's native flora in less than 0.8% of Brazil's territory: an ideal study system for exploring variation in floristic diversity and phylogenetic structure in sites differing in geology and phytophysiognomy. We found significant differences in floristic diversity and phylogenetic structure across a range of study sites encompassing open vegetation and forest on quartzite (FQ) and on ironstone substrates, commonly termed canga . Substrate and physiognomy were key in structuring floristic diversity in the Espinhaço and physiognomy was more important than substrate in structuring phylogenetic diversity, with neither substrate nor its interaction with physiognomy accounting for significant variation in phylogenetic structure. Phylogenetic clustering was significant in open vegetation on both canga and quartzite, reflecting the potential role of environmental filtering in these exposed montane communities adapted to multiple environmental stressors. In forest communities, phylogenetic clustering was significant only at relatively deep nodes of the phylogeny in FQ while no significant phylogenetic clustering was detected across forest on canga (FC), which may be attributable to proximity to the megadiverse Atlantic forest biome and/or comparatively benign environmental conditions in FC with relatively deep, nutrient-rich soils and access to edaphic water reliable in comparison to those for open vegetation on canga and open or forest communities on quartzite. Clades representing relatively old lineages are significantly over-represented in campos rupestres on quartzite, consistent with the Gondwanan Heritage Hypothesis of Ocbil theory. In contrast, forested sites on canga are recognized as Yodfels. To be effective

  2. Plant Biodiversity Drivers in Brazilian Campos Rupestres: Insights from Phylogenetic Structure

    Directory of Open Access Journals (Sweden)

    Daniela C. Zappi

    2017-12-01

    Full Text Available Old, climate-buffered infertile landscapes (Ocbils have attracted increasing levels of interest in recent years because of their exceptionally diverse plant communities. Brazil’s campos rupestres (rupestrian grasslands are home to almost 15% of Brazil’s native flora in less than 0.8% of Brazil’s territory: an ideal study system for exploring variation in floristic diversity and phylogenetic structure in sites differing in geology and phytophysiognomy. We found significant differences in floristic diversity and phylogenetic structure across a range of study sites encompassing open vegetation and forest on quartzite (FQ and on ironstone substrates, commonly termed canga. Substrate and physiognomy were key in structuring floristic diversity in the Espinhaço and physiognomy was more important than substrate in structuring phylogenetic diversity, with neither substrate nor its interaction with physiognomy accounting for significant variation in phylogenetic structure. Phylogenetic clustering was significant in open vegetation on both canga and quartzite, reflecting the potential role of environmental filtering in these exposed montane communities adapted to multiple environmental stressors. In forest communities, phylogenetic clustering was significant only at relatively deep nodes of the phylogeny in FQ while no significant phylogenetic clustering was detected across forest on canga (FC, which may be attributable to proximity to the megadiverse Atlantic forest biome and/or comparatively benign environmental conditions in FC with relatively deep, nutrient-rich soils and access to edaphic water reliable in comparison to those for open vegetation on canga and open or forest communities on quartzite. Clades representing relatively old lineages are significantly over-represented in campos rupestres on quartzite, consistent with the Gondwanan Heritage Hypothesis of Ocbil theory. In contrast, forested sites on canga are recognized as Yodfels. To be

  3. Van Gogh e o campo de trigo com corvos: da tela ao videoclipe

    Directory of Open Access Journals (Sweden)

    Maria Adélia Menegazzo

    2015-09-01

    Full Text Available Há tempos sendo tema de reflexões e discussões entre pensadores, teóricos e artistas, a relação interartes se mantém e se renova nas manifestações artísticas contemporâneas. Hoje, o elo entre as artes e as discussões sobre o tema se estendem para outros campos, indo além da literatura e da pintura, e incluindo a fotografia, o cinema e, ainda, novas mídias, como a publicidade e o videoclipe. Este artigo apresenta uma reflexão sobre o elo entre diferentes formas de arte, o engendramento de uma obra de arte em outra, demonstrando mecanismos do exercício interartes, a partir da tela de Vincent Van Gogh, Campo de trigo com corvos. Propõe-se, então, uma análise sobre a maneira como o tema da pintura, as cores azul e amarelo, bem como os corvos, aparecem em outras manifestações artísticas, neste caso a poesia (À luz dos vegetais, de Contador Borges, o cinema (Sonhos, de Akira Kurosawa, a música e o videoclipe (Corvos sobre o campo, da banda Tantra. Como aporte teórico, são usados os conceitos de multimídia e mixmídia, de Claus Clüver, e descrição e translação pictural, de Liliane Louvel, assim como as discussões de Thiago Soares no que diz respeito a videoclipes.

  4. EL TRABAJO DE CAMPO EN ESTUDIOS SOBRE EDUCACIÓN: CUANDO LOS INVESTIGADORES ENFRENTAN LA REALIDAD

    Directory of Open Access Journals (Sweden)

    Silvia Patricia Aquino Zúñiga

    2010-01-01

    Full Text Available El propósito de este artículo es dar a conocer el significado de experiencias concretas de investigación tienen en la formación de estudiantes universitarios como investigadores. Los hallazgos que aquí se presentan se ubican dentro de un proyecto titulado: Evaluar para mejorar: Sistema de evaluación educativa para escuelas de bajo logro académico, el cual fue auspiciado por el Fondo Mixto de Fomento a la Investigación Científica y Tecnológica CONACYT ¿ Gobierno del Estado de Tabasco, en México. A lo largo de seis semanas, 30 asistentes de investigación, estudiantes de pregrado, agrupados en 10 grupos, visitaron 105 escuelas del estado de Tabasco, para aplicar cuestionarios a directores, profesores, padres de familia y estudiantes, así como exámenes para evaluar el desempeño académico de estos últimos. A través de entrevistas cualitativas enfocadas a los asistentes de investigación, se registraron sus experiencias en la realización del trabajo de campo. Los resultados indican que la experiencia favoreció aspectos formativos en investigación en los estudiantes y proporcionó a los investigadores responsables elementos para mejorar la planificación del trabajo de campo en proyectos futuros. Se concluye que involucrar a estudiantes de pregrado en trabajos de campo en proyectos de investigación resulta enriquecedor tanto para el estudiantado como para las personas responsables del proyecto.

  5. Measuring the Impact of the BP Deepwater Horizon Oil Spill on Consumer Behavior: Evidence from a Natural Experiment.

    OpenAIRE

    O. Ashton Morgan; John C. Whitehead; William L. Huth; Gregory S. Martin; Richard Sjolander

    2013-01-01

    A natural experiment setting is exploited to develop a unique dataset of oyster consumer actual and anticipated behavior immediately prior to and following the BP Deepwater Horizon oil spill. Using data from a repeat sample of oyster consumers, a pre and post-spill revealed and stated preference model allows both a short and longer-term response to the spill to be investigated. Findings indicate that, as expected, the BP spill had a negative impact on oyster demand in terms of short-run actua...

  6. Krisekommunikation på dybt vand: En analyse af BP's håndtering af Deepwater Horizon

    OpenAIRE

    Mærsk-Møller, Christian; Norrmann, Jeppe; Kühl, Alexander Heldbo

    2013-01-01

    This project aims to investigate BP’s crisis management through social media during and after the oil spill from Deepwater Horizon. The project aims to gain an insight into how BP has handled the crisis situation by using Facebook and YouTube. The project will provide an insight in the crisis strategies, that have been used because of the largest environmental disaster ever, and how the new medias such as Facebook and YouTube can be used in this context. A crisis situation leads to a weakenin...

  7. Oceanic, Latitudinal, and Sex-Specific Variation in Demography of a Tropical Deepwater Snapper across the Indo-Pacific Region

    Directory of Open Access Journals (Sweden)

    Ashley J. Williams

    2017-12-01

    Full Text Available Deepwater tropical fisheries provide an important source of income and protein to Pacific and Indian Ocean coastal communities who are highly dependent on fish for food security. The development of quantitative assessments and management strategies for these deepwater fisheries has been hindered by insufficient biological and fisheries data. We examine the age-specific demography of the pygmy ruby snapper Etelis carbunculus, an important target species in tropical deepwater fisheries, across 90° of longitude and 20° of latitude in the Pacific and Indian Oceans. Our results show that growth of E. carbunculus varies significantly between oceans and sexes and across latitudes in both oceans. Estimates of natural and fishing mortality were similar between oceans, but higher for females than males in both oceans. Evidence of greater fishing pressure on females than males is likely due to the larger size-at-age of females compared to males, assuming that selectivity of the fishing gear is related directly to fish size. Sex ratios were significantly female biased in both oceans despite this species being gonochoristic, and maturity schedules were similar between sexes in the Pacific Ocean. This species exhibits a protracted spawning season from mid-spring to autumn (i.e., October to May in the Pacific Ocean. These results represent the first estimates of age-specific demographic parameters for E. carbunculus, and provide the foundation for the development of the first species-specific assessment models and harvest strategies for the species. Future stock assessment models for E. carbunculus should consider sex-specific demographic parameters and spatial variation in demography. Our results reveal substantial differences in biology between E. carbunculus and the giant ruby snapper E. sp., a cryptic congeneric species, and thus contribute to greater clarity in managing fisheries that are dependent on these two species. Furthermore, the improved

  8. Dragmacidin G, a Bioactive Bis-Indole Alkaloid from a Deep-Water Sponge of the Genus Spongosorites.

    Science.gov (United States)

    Wright, Amy E; Killday, K Brian; Chakrabarti, Debopam; Guzmán, Esther A; Harmody, Dedra; McCarthy, Peter J; Pitts, Tara; Pomponi, Shirley A; Reed, John K; Roberts, Bracken F; Rodrigues Felix, Carolina; Rohde, Kyle H

    2017-01-11

    A deep-water sponge of the genus Spongosorites has yielded a bis-indole alkaloid which we have named dragmacidin G. Dragmacidin G was first reported by us in the patent literature and has recently been reported by Hitora et al. from a sponge of the genus Lipastrotheya . Dragmacidin G is the first in this series of compounds to have a pyrazine ring linking the two indole rings. It also has a rare N -(2-mercaptoethyl)-guanidine side chain. Dragmacidin G shows a broad spectrum of biological activity including inhibition of methicillin-resistant Staphylococcus aureus , Mycobacterium tuberculosis , Plasmodium falciparum, and a panel of pancreatic cancer cell lines.

  9. Dragmacidin G, a Bioactive Bis-Indole Alkaloid from a Deep-Water Sponge of the Genus Spongosorites

    Directory of Open Access Journals (Sweden)

    Amy E. Wright

    2017-01-01

    Full Text Available A deep-water sponge of the genus Spongosorites has yielded a bis-indole alkaloid which we have named dragmacidin G. Dragmacidin G was first reported by us in the patent literature and has recently been reported by Hitora et al. from a sponge of the genus Lipastrotheya. Dragmacidin G is the first in this series of compounds to have a pyrazine ring linking the two indole rings. It also has a rare N-(2-mercaptoethyl-guanidine side chain. Dragmacidin G shows a broad spectrum of biological activity including inhibition of methicillin-resistant Staphylococcus aureus, Mycobacterium tuberculosis, Plasmodium falciparum, and a panel of pancreatic cancer cell lines.

  10. Long-term changes in deep-water fish populations in the northeast Atlantic: a deeper reaching effect of fisheries?

    OpenAIRE

    Bailey, D.M.; Collins, M.A.; Gordon, J.D.M.; Zuur, A.F.; Priede, I.G.

    2009-01-01

    A severe scarcity of life history and population data for deep-water fishes is a major impediment to successful fisheries management. Long-term data for non-target species and those living deeper than the fishing grounds are particularly rare. We analysed a unique dataset of scientific trawls made from 1977 to 1989 and from 1997 to 2002, at depths from 800 to 4800 m. Over this time, overall fish abundance fell significantly at all depths from 800 to 2500 m, considerably deeper than the maximu...

  11. The Discovery of Deep Oil Plumes at the Deepwater Horizon Oil Spill Site (Invited)

    Science.gov (United States)

    Diercks, A. R.; Asper, V. L.; Highsmith, R. C.; Woolsey, M.; Lohrenz, S. E.; McLetchie, K.; Gossett, A.; Lowe, M., III; Joung, D.; McKay, L.

    2010-12-01

    In May 2010, the National Institute for Undersea Science and Technology (NIUST), a partnership of the University of Mississippi, the University of Southern Mississippi and NOAA, had a 17-day research cruise aboard the UNOLS vessel R/V Pelican scheduled. Two weeks before departure, the Deepwater Horizon oil platform burned and sank, resulting in an uncontrolled oil spill at a depth of ~1500 m at Mississippi Canyon Block 252. The initial mission plan to do AUV surveys of wrecks and hydrate outcrops in the northern Gulf of Mexico, some of them very close to the site of the accident, was abandoned in favor of responding to the still uncontrolled oil spill. The primary goals of the redefined cruise were to acquire baseline and early impact data for seafloor sediments and subsurface distribution of oil and gas hydrates as close as possible in time and space to the origin of the oil spill. Investigating an oil spill nearly a mile deep in the ocean presents special benthic sampling and subsurface oil detection challenges. NIUST’s AUV’s were unloaded from the ship and a large main winch installed to allow operation of a full ocean depth box corer for collecting sediment samples in water depths up to 2000 m. During the first five-day leg of the cruise, a total of 28 box cores were collected. The Pelican returned to port (Cocodrie, LA) to drop off sediment and water samples for immediate analyses, and to take on more sampling gear and supplies for the second leg of the cruise, including an Acrobat, a CDOM fluorometer, a Video Ray ROV, and a CO2 sensor in addition to the already installed CTD Rosette with O2 sensor and beam transmissometer. During Leg 2, CTD stations were plotted to cover the area surrounding the wreck site and at various water depths to map the subsurface water column structure and chemistry as baseline values for future investigations and especially to look for submerged oil and/or gas hydrates. Early in the water column sampling, a subsurface feature

  12. O professor de enfermagem: atuação em campo clínico

    Directory of Open Access Journals (Sweden)

    Marie Germaine Claire Lanthier

    1984-03-01

    Full Text Available O estudo procurou averiguar a opinião dos estudantes de enfermagem a respeito de determinados papéis desempenhados pelos professores em campo clínico, a fim de saber qual destes mais influencia na sua aprendizagem. Os três papéis escolhidos - Orientador Facilitador e Modelo - fundamentam-se nas três seguintes teorias: Bloom. Rogers e Bandura Os résultados entretanto, mais acentuada no grupo de estudantes que se acham nos últimos períodos do curso.

  13. Efeito do pastejo sobre as assembleias de formigas nos campos sulinos

    OpenAIRE

    William Dröse

    2015-01-01

    A conservação da biodiversidade aliada ao uso sustentável dos ecossistemas é considerada um grande desafio. A atividade pastoril é um dos principais tipos de uso da terra e cobre cerca de 25% da superfície terrestre. No entanto, apenas recentemente é que a manutenção da biodiversidade dos ecossistemas surgiu como preocupação em função desta prática. Os Campos Sulinos são ambientes do sul do Brasil que abrigam uma ampla riqueza de espécies. As formigas desempenham papéis essenciais nestes ecos...

  14. Estilo cognitivo de dependencia-independencia de campo y proceso lector

    OpenAIRE

    Kirchner, Teresa

    1987-01-01

    Este estudio trata de determinar si se dan relaciones de covariación entre la aptitud de reestructuración (una de las manifestaciones del constructo «Dependencia-Independencia de campo» (DIC) y el proceso lector.La DIC es uno de los Estilos Cognitivos surgidos a raíz de las investigaciones que sobre la percepción de la verticalidad realizaban Witkin y Asch a finales de los años 40, y que derivó finalmente en un modelo explicativo de las diferencias individuales, basado en el grado de diferenc...

  15. Efectos de tratamientos de presiembra sobre el comportamiento a campo de semillas de zanahoria y pimiento

    OpenAIRE

    Sánchez, R.; Kramarovsky, Emilio; Vallejo, Héctor; Fernández Lozano, José; Tognetti, Jorge Alberto

    1981-01-01

    p.173-181 Con el propósito de acelerar y uniformar la emergencia de plántulas de zanahoria (Daucus carota L.) y pimiento (Capsicum annuum L.) se ensayaron dos técnicas: el tratamiento de presiembra con soluciones de bajo potencial osmótico (TO) y la siembra en medio fluido de semillas germinadas (SMF). Durante dos años se realizaron 5 experimentos a campo con semillas de zanahoria cv. Chantenay sel. La Consulta y cv. Chantenay Red Cored y tres con pimiento cv. Ambato. En todos los casos ta...

  16. Procesiones, rogativas, conjuros y exorcismos : el campo valenciano ante la plaga de langosta de 1756

    OpenAIRE

    Alberola-Romá, Armando

    2003-01-01

    Entre los años 1756-1758 una plaga de langosta devastó los campos valencianos y los de buena parte de la geografía peninsular. Sus consecuencias alcanzaron enorme relevancia en el antiguo reino de Valencia al coincidir, además, con una meteorología adversa y con las dificultades de comercio y navegación derivadas del inicio de la guerra de los Siete Años. La manera de afrontar la plaga, utilizando «medios técnicos» combinados con otros de carácter «religioso» o «mágico» muy ...

  17. Environmental quality in mid-sized cities: case study of the city of Campos dos Goytacazes

    Directory of Open Access Journals (Sweden)

    Jane Ilce Barreto de Souza

    2010-05-01

    Full Text Available This work analyzes the urban environmental quality of Campos dos Goytacazes, a mid-sized city located in Rio de Janeiro, Brazil. The evaluation was based on indicators associated to local traffic and verticalization process. Inhabitants of the most populated areas were interviewed in order to depict the main disturbances caused by traffic intensification and urban verticalization. According to the interviewed, life and environmental quality has suffered severe deterioration, disturbing dwellers in terms of increasing amount of neighbors, noise levels, loss of individual freedom (parking, lack of privacy in recreational and private living areas, and consequent property devaluation.

  18. RELACIÓN ENTRE DIFERENTES PRUEBAS DE CAMPO: FUERZA, POTENCIA Y VELOCIDAD

    OpenAIRE

    Jessenia Hernández Elizondo

    2003-01-01

    Esta investigación tuvo como propósito principal el encontrar por medio de pruebas en las variables de fuerza, potencia y velocidad, la relación matemática existente entre estos tres constructos. Participaron 56 sujetos varones con edades entre 18 y 25 años. Con el fin de responder al objetivo del estudio, se les aplicaron pruebas de campo de fuerza (1RM de sentadilla completa y repeticiones máximas al 80% 60% 40% y 20%), de velocidad (30 metros lanzados y 30 metros sin impulso), y de potenci...

  19. Notas a la gaviota libertada en el campo, 31 de enero de 1951

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Notas a la Gaviota reidora (Larus ridibundus) libertada en el campo, cerca del Puente Colgante de Valladolid, el 31 de enero de 1951. Incluye observaciones de patos domésticos y Pavos reales (Pavo cristatus), y un pequeño esquema del enclave observado. Notes to the Common Black-headed Gull (Larus ridibundus) released in the field, near the Puente Colgante of Valladolid, the 31st of January of 1951. Observations of domestic ducks and Indian Peafowls (Pavo cristatus) and a little map of the ...

  20. Salida de campo a Laguna de Duero (Valladolid) el 14 de febrero de 1951

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo a Laguna de Duero, en la provincia de Valladolid, durante la mañana del 14 de febrero de 1951, de la que se anotaron observaciones sobre las siguientes aves: Accipiter nisus (Gavilán común, también llamado Astur palumbarius por el autor), Anas penelope (Silbón europeo), Anas platyrhynchos (Ánade azulón), Anser anser (Ánsar común), Anthus sp. (Bisbita), Ciconia ciconia (Cigüeña blanca), Clamator glandarius (Críalo europeo), Coccothraustes coccothraustes (Picogordo), Corvus coro...

  1. Salida de campo a Fuensaldaña (Valladolid) el 19 de agosto de 1953

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo a Fuensaldaña, en Valladolid, el 19 de agosto de 1953, de la que se anotaron observaciones sobre las siguientes aves: Alauda arvensis (Alondra común), Calandrella sp. (Terrera), Galerida sp. (Cogujada), Locustella naevia (Buscarla Pintoja), Pterocles alchata (Ganga ibérica) y Saxicola rubetra (Tarabilla norteña). Field trip to Fuensaldaña, at Valladolid, the 19th of August of 1953, of which there were noted observations about the following birds: Alauda arvensis (Eurasian S...

  2. Salida de campo a Santo Domingo de Silos, en Burgos, el 14 de septiembre de 1953

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo a Santo Domingo de Silos, en Burgos, el 14 de septiembre de 1953, de la que se anotaron observaciones sobre cangrejos, los siguientes peces: "Foxinellus sp." y Trucha (Salmo trutta o Oncorhynchus mykiss), los siguientes mamíferos: Bos taurus (Vaca), Capra aegagrus hircus (Cabra doméstica) y Galemys pyrenaicus (Desmán pirenaico), y las siguientes aves: Aquila sp. (Águila), Carduelis cannabina (Pardillo común, llamada Colorín y Acanthis cannabina por el autor), Carduelis carduel...

  3. Salida de campo a Etang de Fournelet (Francia) el 1 de mayo de 1954

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Salida de campo a Etang de Fournelet, seguramente cerca a la reserva natural de La Camarga, en el delta del río Ródano (Provenza), el 1 de mayo de 1954, de la que se anotaron observaciones sobre las siguientes aves: Actitis hypoleucos (Andarríos chico, llamado Actynioides hypoleucus por el autor), Circus aeruginosus (Aguilucho lagunero occidental), Himantopus himantopus (Cigüeñuela común), Motacilla flava (Lavandera boyera), Saxicola rubetra (Tarabilla norteña), Sylvia conspicillata (Curruca ...

  4. Investigación perfil en competencias y habilidades del empresario bogotano: trabajo de campo

    OpenAIRE

    Granada Forero, José Andrés; Lara Salinas, Karen Eliana

    2013-01-01

    Este documento corresponde al trabajo de campo para la investigación doctoral de Luis Alberto Estrada titulado “Perfil en competencias del empresario bogotano”. El objetivo que el equipo de investigación definió fue concretar las habilidades y competencias que acompañan a los emprendedores y fundadores de empresa en la primera década del siglo XXI. Para ello, se tomó una base de datos de la Cámara de Comercio de Bogotá, la cual contiene la información comercial de las empresas de la ciudad...

  5. REFLEXÕES SOBRE MODERNIDADE, TURISMO E CAMPO SOCIAL NO ESTADO DE ALAGOAS - BRASIL

    OpenAIRE

    Daniel Arthur Lisboa de Vasconcelos; Edson José Gouveia Bezerra

    2013-01-01

    O presente artigo, de caráter ensaístico, visa a contribuir com reflexões sobre modernidade, turismo e campo social sociais no Estado de Alagoas - Brasil. Utilizando o referencial de autores como Giddens (2001), Jameson (2002) e Harvey (1992), dentre outros, sintetizaremos algumas características das transições socioculturais da modernidade para o atual estágio do modo de produção capitalista, período que muitos têm considerado como a “pós-modernidade”. Posteriormente, empreenderemos breve de...

  6. Centralización del bombeo hidraulico en el campo lago agrío

    OpenAIRE

    Ronquillo Del Pozo, Carlos; Medina Vargas, William; Roman Franco, Hector

    2009-01-01

    El presente trabajo tiene como finalidad la construcción de dos estaciones de bombeo hidráulico centralizadas, la primera será instalada en la estación de producción central y la otra en la estación de producción norte, del campo Lago Agrio propiedad de Petroecuador ,ya que existe el espacio físico y la infraestructura necesaria para su construcción. La construcción de este sistema centralizado se lo propone como solución al problema energético por el cual atraviesa el sistema de bombeo...

  7. Prevalence of methylphenidate use by university students in Campos dos Goytacazes, RJ

    Directory of Open Access Journals (Sweden)

    Fernanda Fraga Pessanha

    2014-08-01

    Full Text Available Methylphenidate is a central nervous system stimulant commonly prescribed for children with Attention Deficit Hyperactivity Disorder. The aim of this study was to identify the prevalence of methylphenidate users among college students, as well as the main reasons for it, ways of acquisition, and possible side effects. The study demonstrated a 60% prevalence of the use of methylphenidate by university students in Campos dos Goytacazes. We conclude that there is a high rate of use of methylphenidate among students in this city. The authors suggest an awareness campaign on the risks of inappropriate use of methylphenidate.

  8. El campo de la investigación contable: oportunidades para los investigadores colombianos

    OpenAIRE

    Macías Cardona, Hugo A.; Cortés Cueto, Jaider

    2009-01-01

    Este artículo se propone ubicar la investigación contable colombiana en el ámbito mundial, a partir del concepto de campo científico popularizado por el sociólogo francés Pierre Bourdieu. Para ello, plantea un marco conceptual, describe la evolución de los grupos de investigación y las revistas en el país, presenta algunas tendencias en las publicaciones internacionales más visibles e identifica los retos que deben enfrentar los investigadores en Colombia para contribuir al despegue de esta i...

  9. El impuesto al valor agregado en los contratos de campos marginales

    OpenAIRE

    Niquinga Salazar, Oscar Javier

    2007-01-01

    Esta investigación dirigida por los métodos de investigación sistemático, exegético, y teleológico, pretende analizar los contratos petroleros de Campos Marginales utilizados por la legislación ecuatoriana y específicamente, el papel de Impuesto al Valor Agregado en la producción de la Curva Base; ésta, se convierte en una figura contractual innovadora que ha producido una interesante discusión a nivel nacional; sin embargo, la propuesta de este trabajo va encaminado a encontra...

  10. Campo magnético discontinuo en adultos con hipertensión arterial esencial

    OpenAIRE

    Enrique Arce Morera; Jorge Remis Sotelo; Jesús Hernández Méndez; Ismael Castañeda Rodríguez

    2003-01-01

    Se realizó un estudio piloto a 44 casos remitidos al Departamento de Fisioterapia de nuestro municipio con diagnóstico de hipertensión arterial esencial ligera y moderada, aplicándosele 15 sesiones de campo magnético discontinuo durante 15 min. Para buscar el grado de efectividad se utilizó el método estadístico de Mc Nemar, resultando muy significativa la reducción en los valores de la presión arterial, principalmente la máxima. Hubo un favorable efecto socioeconómico, pues se ahorró en el e...

  11. Characterization of ceramic bodies to produce bricks from Campos Goytacazes, Brazil

    International Nuclear Information System (INIS)

    Almeida, L.L.P. de; Maia, F.S.; Petrucci, L.J.T.; Pessanha, E.M.; Paixao, L.P.

    2010-01-01

    This work has for objective to study comparatively the characteristics and technological properties of four typical ceramic bodies from the region of Campos dos Goytacazes-RJ used to fabricate red ceramics. The characterization techniques used were: X-ray fluorescence, X-ray diffraction, differential thermal analysis (DTA), thermogravimetric analysis (TGA) and dilatometry. Specimens were molded by extrusion and then fired at 750, 850 and 950 deg C. The evaluated firing properties were: linear shrinkage and water absorption. The results showed that the investigated ceramic bodies have similar chemical and mineralogical composition. It is also concluded that the bodies are adequate to produce bricks. (author)

  12. HACIA LA (RE)CONSTRUCCIÓN DEL CAMPO MUSICAL NACIONAL UNA LECTURA EN CLAVE DE ROCK

    OpenAIRE

    GARCÍA, DAVID FERNANDO

    2009-01-01

    A partir del entrecruzamiento de dos visiones de diferente naturaleza sobre el panorama de la producción musical en Colombia, este artículo propone una manera de concebir la lógica del campo musical nacional. Esta construcción analítica de índole relacional pretende dar cuenta del espacio social en el que se negocia y define, tanto la producción de los diferentes géneros que conforman el universo de la música popular contemporánea en Colombia como las prácticas de los actores e instituciones ...

  13. El campo científico de la contabilidad: panorama internacional de las revistas

    OpenAIRE

    Macías Cardona, Hugo Arlés; Moncada Ruiz, Tatiana

    2011-01-01

    A partir de la noción de campo científico del sociólogo francés Pierre Bourdieu, este artículo identifica las características de la brecha existente entre la academia contable anglosajona y la academia contable latinoamericana. El objetivo es identificar algunos retos específicos que debe enfrentar la investigación latinoamericana, para acercarse a la frontera del conocimiento contable, moverse dentro de su dinámica y hacer aportes concretos. Para ello se presentan los principales avances de ...

  14. ARBORIZACIÓN DE PLAZA Y PERCEPCIÓN HUMANA EN CAMPOS DOS GOYTACAZES, RJ

    OpenAIRE

    Cláudio Luiz Melo de Souza; Verônica de Morais; Paulo Roberto Corrêa Landgraf

    2011-01-01

    Cuando aumenta la percepción ambiental de las personas, tambien se reduce el grado del vandalismo contralos bienes públicos, jardines y plazas, entonces la creencia popular es una inportante estrategia para losplaneamentos y mantenimientos de la arborización urbana. Este estudio tiene como objetivo diagnosticar laopinión de la población de Campos dos Goytacazes (RJ), sobre la forestación de la Plaza Barón del RioBranco. Se hizo un levantamiento cuantitativo de los arboles y se realizó una enc...

  15. LAS RELACIONES DE BIENESTAR SOCIAL Y LOS CAMPOS DE INTERVENCIÓN DEL TRABAJO SOCIAL

    Directory of Open Access Journals (Sweden)

    Edgar Malagón Bello

    2012-04-01

    Full Text Available El Bienestar Social identifica al grupo de relaciones surgidas de los imperativos éticos de ayuda social y a las entidades, programas y acciones en que se traducen. Crea canales de redistribución del ingreso que complementa el salario, dando origen a una especie de paralelismo con respecto a las relaciones de mercado. La Asistencia Social, la Autogestión, la Política Social, la Seguridad Social y el Bienestar Social Laboral, constituyen los campos de intervención profesional y representan una de las expresiones más importantes y menos interpretadas del objeto disciplinar.

  16. O PROFESSOR DAS ESCOLAS DO CAMPO: TRABALHADOR DE MÚLTIPLAS JORNADAS DE TRABALHO

    OpenAIRE

    Odimar J. Peripolli; Alceu Zoia

    2014-01-01

    As crescentes transformações socioeconômicas e o desenvolvimento do modo de produção têm provocado mudanças significativas no mundo do trabalho. As mudanças se fazem sentir também na escola. Neste trabalho nos propomos trazer para a reflexão um pouco da realidade da educação do campo, mais especificamente, as condições de trabalho do professor. Trabalhador dividido entre os muitos afazeres. Na roça: o camponês-professor e, na escola/ sala de aula: o professor-camponês. Em ambas as atividades,...

  17. Conservación y gestión del paisaje en el Campo de Albacete = Landscape conservation and management in the Campo de Albacete

    Directory of Open Access Journals (Sweden)

    José Luis Rodríguez García

    2015-10-01

    Full Text Available El artículo toma como base el territorio del Campo de Albacete, espacio donde se hace notar la influencia de la capital albaceteña en las poblaciones vecinas. La rica variedad paisajística que atesora necesita una intensa gestión de conservación para su puesta en valor como recurso imprescindible. Las diferentes encuestas entre población y visitantes, nos han proporcionado un pormenorizado análisis a escala local, a su vez compaginado con el trabajo de campo, por lo que hemos podido contrastar la percepción que de su paisaje tienen tanto los propios residentes como los agentes sociales de los aspectos y realidades de los distintos paisajes del territorio analizado. Si evaluamos los rasgos que identifican a este paisaje, fuertemente ligado al modo de vida de las personas que lo habitan, está llamado a una rápida desaparición ante los constantes cambios desarrollados en estas últimas décadas, por lo que su protección es necesaria y debe estar lo suficientemente reflejada en los documentos base para su buena gestión. Consideramos factores fundamentales para la gestión efectiva del paisaje en el territorio las llamadas Agendas 21, la importancia patrimonial de la ciudad de Chinchilla y el desarrollo turístico.The article takes as starting point the territory of the Campo de Albacete, an area where the influence of the capital city in the surrounding towns is stated. The wide landscape variety that amasses needs a powerful preservation management in order to highlight it as an essential resource. The different surveys carried out among the population and the visitors have provided a detailed analysis at a local level, combined at the same time with the field work; being able to check the perception, on the one hand, of the population, and on the other hand, of the social factors of the different aspects and realities of the different landscapes of analysed territory. If we assess the characteristics of this

  18. Global hierarchical classification of deepwater and wetland environments from remote sensing products

    Science.gov (United States)

    Fluet-Chouinard, E.; Lehner, B.; Aires, F.; Prigent, C.; McIntyre, P. B.

    2017-12-01

    Global surface water maps have improved in spatial and temporal resolutions through various remote sensing methods: open water extents with compiled Landsat archives and inundation with topographically downscaled multi-sensor retrievals. These time-series capture variations through time of open water and inundation without discriminating between hydrographic features (e.g. lakes, reservoirs, river channels and wetland types) as other databases have done as static representation. Available data sources present the opportunity to generate a comprehensive map and typology of aquatic environments (deepwater and wetlands) that improves on earlier digitized inventories and maps. The challenge of classifying surface waters globally is to distinguishing wetland types with meaningful characteristics or proxies (hydrology, water chemistry, soils, vegetation) while accommodating limitations of remote sensing data. We present a new wetland classification scheme designed for global application and produce a map of aquatic ecosystem types globally using state-of-the-art remote sensing products. Our classification scheme combines open water extent and expands it with downscaled multi-sensor inundation data to capture the maximal vegetated wetland extent. The hierarchical structure of the classification is modified from the Cowardin Systems (1979) developed for the USA. The first level classification is based on a combination of landscape positions and water source (e.g. lacustrine, riverine, palustrine, coastal and artificial) while the second level represents the hydrologic regime (e.g. perennial, seasonal, intermittent and waterlogged). Class-specific descriptors can further detail the wetland types with soils and vegetation cover. Our globally consistent nomenclature and top-down mapping allows for direct comparison across biogeographic regions, to upscale biogeochemical fluxes as well as other landscape level functions.

  19. Computalog's LWD system designed for deepwater drilling environments

    Energy Technology Data Exchange (ETDEWEB)

    Brady, K. [Precision Drilling Corporation, (Canada)

    2002-08-01

    To keep up with the ever changing requirements of drilling engineers for MWD and LWD (measuring -while-drilling and logging-while- drilling) equipment capable to withstand bore pressures of 20,000 to 25,000 psi and flow rates above industry average, is part of Computalog's ongoing effort to provide innovative technology for the industry's evolving drilling requirements. This paper describes the new PrecisionLWD'TM' system which is rated at 30,000 psi and is designed with the extra margin of reliability and performance needed for hostile deepwater environments. The system is made up of a series of high temperature tools and sensors. The entire system and all its individual tools are rated to 30,000 psi and have flow ratings of 400 gallons/minute, 1,000 gallons/minute, and 1,800 gallons/minute respectively, depending on tool size. The tools are manufactured at Houston, TX, at a facility that is equipped with testing equipment to simulate all aspects of extreme drilling conditions, including thermal cycling, vibration and pressure testing. The facility also features a 6,000-ft flow-loop for erosion and lost circulation testing and a computer array with the power equivalent of several Cray mainframes. The finished tools are calibrated and tested to a number of known standards and hole sizes, including aluminum and magnesium blocks, and a variety of formation types. Research and development efforts are also underway to make these tools compatible with the Precision Impulse'TM' Electromagnetic MWD system.

  20. Bathymetric controls on Pliocene North Atlantic and Arctic sea surface temperature and deepwater production

    Science.gov (United States)

    Robinson, M.M.; Valdes, P.J.; Haywood, A.M.; Dowsett, H.J.; Hill, D.J.; Jones, S.M.

    2011-01-01

    The mid-Pliocene warm period (MPWP; ~. 3.3 to 3.0. Ma) is the most recent interval in Earth's history in which global temperatures reached and remained at levels similar to those projected for the near future. The distribution of global warmth, however, was different than today in that the high latitudes warmed more than the tropics. Multiple temperature proxies indicate significant sea surface warming in the North Atlantic and Arctic Oceans during the MPWP, but predictions from a fully coupled ocean-atmosphere model (HadCM3) have so far been unable to fully predict the large scale of sea surface warming in the high latitudes. If climate proxies accurately represent Pliocene conditions, and if no weakness exists in the physics of the model, then model boundary conditions may be in error. Here we alter a single boundary condition (bathymetry) to examine if Pliocene high latitude warming was aided by an increase in poleward heat transport due to changes in the subsidence of North Atlantic Ocean ridges. We find an increase in both Arctic sea surface temperature and deepwater production in model experiments that incorporate a deepened Greenland-Scotland Ridge. These results offer both a mechanism for the warming in the North Atlantic and Arctic Oceans indicated by numerous proxies and an explanation for the apparent disparity between proxy data and model simulations of Pliocene northern North Atlantic and Arctic Ocean conditions. Determining the causes of Pliocene warmth remains critical to fully understanding comparisons of the Pliocene warm period to possible future climate change scenarios. ?? 2011.