Academic literature on the topic 'OAE3'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'OAE3.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "OAE3"
1
Liu, Kaiyu. "Upper Cretaceous sequence stratigraphy, sea-level fluctuations and Oceanic Anoxic Events 2 and 3, Northeastern Gulf of Mexico." Stratigraphy 2, no. 2 (2005): 147–66. http://dx.doi.org/10.29041/strat.02.2.03.
Full textAbstract:
The relationship between Oceanic Anoxic Events (OAEs) and sea-level fluctuations can be determined by placing OAE sediments into an integrated sequence stratigraphic framework based on biostratigraphic age control, and regional seismic and well-log data. Two Upper Cretaceous black shale units in the northeastern Gulf of Mexico area, the Marine Tuscaloosa shale and the downdip Eutaw shale, are interpreted to be deposited in association with Late Cretaceous OAE 2 (Cenomanian–Turonian boundary event) and OAE3 (late Coniacian – early Santonian). TheMarine Tuscaloosa shale accumulated during the maximum flooding event of the UKI sequence (middle Cenomanian to upper Turonian); and the downdip Eutaw shale accumulated as the early transgressive systems tract of theUKII sequence (upperConiacian to upperCampanian). These OAEs can be classified into two categories according to their sequence stratigraphic positions. Type I OAE (e.g., OAE 2) occurred during a maximum flooding event, and the black shale associated with this type of event was deposited in an open shelf environment. Type II OAE (e.g., OAE 3) occurred during the early phase of a marine transgression that resulted in the inundation of large coastal areas and the formation of lagoons and estuaries, which acted to trap large quantities of terrestrial organic carbon.
2
Ismail, Ahmed Aly. "A New Epistemological Insight of the Coniacian-Santonian Oceanic Anoxic Event (OAE3)." American Journal of BioScience 12, no. 1 (2024): 22–34. http://dx.doi.org/10.11648/j.ajbio.20241201.14.
Full textAbstract:
Eighteen planktic and eleven benthic foraminiferal species were recorded from the dark grey to black shale facies of the Matulla Formation in Abu Zeneima area, West-Central Sinai, Egypt. The faunal assemblage is dominated by cosmopolitan whiteinellids, marginotruncanids, Dicarinellids, Contusotruncanids and Heterohelicids. The planktic species with high taxonomic diversity were used to zone the Coniacian and Santonian stages, as well as define the Coniacian/ Santonian boundary, while benthic foraminifera is of minor contribution in age assignment. The stratigraphic analysis of the relations and ranges of these fauna led to the recognition of five biozones<i>; Dicarinella primitiva</i> or <i>Huberella huberi</i> or <i>Marginotruncana</i> <i>sinuosa</i> for the Coniacian, while <i>Dicarinella concavata</i> and <i>Dicarinella asymetrica</i> for the Santonian. Also, the Coniacian/Santonian boundary was delineated, considering the appearance of <i>Dicarinella</i> <i>concavata</i> and disappearance of <i>Huberella huberi</i>, as well as the<i> </i>increase of Marginotruncanids (<i>M. renzi, M. sigali, M. marginata, M. pseudolinneiana</i>….etc.). Furthermore, the black shales found in the middle part of the Matulla Formation were attributed to the Coniacian-Santonian Oceanic Anoxic Event (OAE3). The occurrence of black shales with planktic foraminifera during the Coniacian–Santonian interval in several countries belonging to five continents, was the main impetus to render this event a global event.
3
Topper, R. P. M., J. Trabucho Alexandre, E. Tuenter, and P. Th Meijer. "A regional ocean circulation model for the mid-Cretaceous North Atlantic Basin: implications for black shale formation." Climate of the Past 7, no. 1 (2011): 277–97. http://dx.doi.org/10.5194/cp-7-277-2011.
Full textAbstract:
Abstract. High concentrations of organic matter accumulated in marine sediments during Oceanic Anoxic Events (OAEs) in the Cretaceous. Model studies examining these events invariably make use of global ocean circulation models. In this study, a regional model for the North Atlantic Basin during OAE2 at the Cenomanian-Turonian boundary has been developed. A first order check of the results has been performed by comparison with the results of a recent global Cenomanian CCSM3 run, from which boundary and initial conditions were obtained. The regional model is able to maintain tracer patterns and to produce velocity patterns similar to the global model. The sensitivity of the basin tracer and circulation patterns to changes in the geometry of the connections with the global ocean is examined with three experiments with different bathymetries near the sponges. Different geometries turn out to have little effect on tracer distribution, but do affect circulation and upwelling patterns. The regional model is also used to test the hypothesis that ocean circulation may have been behind the deposition of black shales during OAEs. Three scenarios are tested which are thought to represent pre-OAE, OAE and post-OAE situations. Model results confirm that Pacific intermediate inflow together with coastal upwelling could have enhanced primary production during OAE2. A low sea level in the pre-OAE scenario could have inhibited large scale black shale formation, as could have the opening of the Equatorial Atlantic Seaway in the post-OAE scenario.
4
Topper, R. P. M., J. Trabucho Alexandre, E. Tuenter, and P. Th Meijer. "A regional ocean circulation model for the mid-Cretaceous North Atlantic Basin: implications for black shale formation." Climate of the Past Discussions 6, no. 5 (2010): 2371–421. http://dx.doi.org/10.5194/cpd-6-2371-2010.
Full textAbstract:
Abstract. High concentrations of organic matter accumulated in marine sediments during Oceanic Anoxic Events (OAEs) in the Cretaceous. Model studies examining these events invariably make use of global ocean circulation models. In this study, a regional model for the North Atlantic Basin during OAE2 at the Cenomanian-Turonian boundary is developed. A first order check of the results is performed by comparison with the results of a recent global Cenomanian CCSM3 run from which boundary and initial conditions were obtained. The regional model is able to maintain tracer patterns and to produce velocity patterns similar to the global model. The sensitivity of basin tracer and circulation patterns to changes in the geometry of the connections with the global ocean is examined with three experiments with different bathymetries near the sponges. Different geometries turn out to have little effect on tracer distribution, but do affect circulation and upwelling patterns. The regional model is also used to test the hypothesis that ocean circulation may be behind the deposition of black shales during OAEs. Three scenarios are tested which are thought to represent pre-OAE, OAE and post-OAE situations. Model results confirm that Pacific intermediate inflow together with coastal upwelling can have enhanced primary production during OAE2. A low sea level in the pre-OAE scenario can inhibit large scale black shale formation, as can the opening of the Equatorial Atlantic Seaway in the post-OAE scenario.
5
Freymueller, Nicholas A., Jason R. Moore, and Corinne E. Myers. "An analysis of the impacts of Cretaceous oceanic anoxic events on global molluscan diversity dynamics." Paleobiology 45, no. 02 (2019): 280–95. http://dx.doi.org/10.1017/pab.2019.10.
Full textAbstract:
AbstractOceanic anoxic events (OAEs) are contemporaneous with 11 of the 18 largest Phanerozoic extinction events, but the magnitude and selectivity of their paleoecological impact remains disputed. OAEs are associated with abrupt, rapid warming and increased CO2flux to the atmosphere; thus, insights from this study may clarify the impact of current anthropogenic climate change on the biosphere. We investigated the influence of the Late Cretaceous Bonarelli event (OAE2; Cenomanian/Turonian stage boundary; ~94 Ma) on generic- and species-level molluscan diversity, extinction rates, and ecological turnover. Cenomanian/Turonian results were compared with changes across all Cretaceous stage boundaries, some of which are coincident with less severe OAEs. We found increased generic turnover, but not species-level turnover, associated with several Cretaceous OAEs. The absence of a species-level pattern may reflect species occurrence data that are too temporally coarse to robustly detect patterns. Five hypotheses of ecological selectivity relating anoxia to survivorship were tested across stage boundaries with respect to faunality, mobility, and diet using generalized linear models. Interestingly, benthic taxa were consistently selected against throughout the Cretaceous regardless of the presence or absence of OAEs. These results suggest that: (1) the Cenomanian/Turonian boundary (OAE2) was associated with a decline in molluscan diversity and increase in extinction rate that were significantly more severe than Cretaceous background levels; and (2) no differential ecological selectivity was associated with OAE-related diversity declines among the variables tested here.
6
Aradhana, Aparna, Gadadhar Sarangi, Prasant Saboth, and Radha Tripathy. "Assessment of Hearing Impairment in NICU Graduates by Otoacoustic Emission and Brainstem Evoked Response Audiometry Tests." Journal of Neonatology 34, no. 3 (2020): 109–17. http://dx.doi.org/10.1177/0973217920951878.
Full textAbstract:
Objectives: To find out the incidence of hearing impairment in Neonatal Intensive Care Unit (NICU)-admitted newborns and to correlate between several risk factors. Design: Prospective observational study. Setting: In a tertiary teaching hospital of Odisha between October 2014 and October 2016. Study population: 100 newborns delivered in the institution and admitted in NICU with usual indications and risk factors that underwent otoacoustic emission 1 and 2 (OAE1, OAE2) and Brainstem Evoked Response Audiometry (BERA). Results: 84 babies in OAE1 and 86 babies in OAE2 got “pass” results. In BERA test, 92 babies got normal waveform. 7 (13.7%) of 51 premature babies, 5 (38.5%) of 13 very low birth weight babies, 7 (17.5%) of 40 babies receiving ototoxic medication for >5 days, 7 (31.8%) of 22 babies with hyperbilirubinemia, 6 (42.9%) of 14 babies with sepsis, 5 (20%) of 20 babies with birth asphyxia, 3 (60%) of 5 babies under mechanical ventilation for >5 days, 1 baby with ear abnormality, and 1 (50%) out of 2 babies with congenital infections had hearing impairment and statistically significant association with abnormal OAE and BERA test. Conclusion: There is high incidence of hearing loss in NICU-admitted newborns. OAE and BERA both should be performed for complete evaluation of hearing. Important risk factors are elaborated. Predischarge hearing assessment in NICU is most important.
7
Karakitsios, V., H. Tsikos, K. Agiadi - Katsiaouni, S. Dermitzoglou, and E. Chatziharalambous. "THE USE OF CARBON AND OXYGEN STABLE ISOTOPES IN THE STUDY OF GLOBAL PALAEOCEANOGRAPHIC CHANGES: EXAMPLES FROM THE CRETACEOUS SEDIMENT ROCKS OF WESTERN GREECE." Bulletin of the Geological Society of Greece 39, no. 1 (2006): 64. http://dx.doi.org/10.12681/bgsg.18445.
Full textAbstract:
In the present paper we examine the use of carbon and oxygen stable isotopes in the study of global palaeoceanographic changes, with special reference to the oceanic anoxic events (OAEs). The analysis of stable isotopes was applied to the examination of Cretaceous sediments from the Ionian and Pindos zones of Western Greece. In the Ionian zone the carbon and oxygen stable isotopes, combined with biostratigraphic data, record the palaeoenvironmental change corresponding to the anoxic events Bonarelli (Cenomanian/Turonian, OAE2) and Paquier (Lower Albian, OAE1b). In the Pindos zone, within the Cretaceous sediments, we observed two organic-carbon-rich levels. According to the biostratigraphic and isotopie analysis, the first level corresponds to an OAE of Santonian age. This local oceanic anoxic event is described for the first time. The second level, Aptian - Albian age, possibly correlates to either the Paquier event (OAE 1b) or the Selli event (OAE 1a), which in Greece were until now known only in the Ionian zone.
8
Machado, M. C., F. Chemale, K. Kawashita, O. Rey, and C. A. V. Moura. "Isotope studies of carbonate rocks of La Luna Formation (Venezuela) to constrain the oceanic anoxic event 3 (OAE3)." Journal of South American Earth Sciences 72 (December 2016): 38–48. http://dx.doi.org/10.1016/j.jsames.2016.07.001.
Full text
9
Lowery, Christopher M., R. Mark Leckie, and Bradley B. Sageman. "Micropaleontological evidence for redox changes in the OAE3 interval of the US Western Interior: Global vs. local processes." Cretaceous Research 69 (January 2017): 34–48. http://dx.doi.org/10.1016/j.cretres.2016.08.011.
Full text
10
Abdala, Carolina, Tricia Benjamin, Samantha Stiepan, Ping Luo, and Christopher A. Shera. "Detection of mild sensory hearing loss using a joint reflection-distortion otoacoustic emission profile." Journal of the Acoustical Society of America 156, no. 4 (2024): 2220–36. http://dx.doi.org/10.1121/10.0030399.
Full textAbstract:
Measuring and analyzing both nonlinear-distortion and linear-reflection otoacoustic emissions (OAEs) combined creates what we have termed a “joint-OAE profile.” Here, we test whether these two classes of emissions have different sensitivities to hearing loss and whether our joint-OAE profile can detect mild-moderate hearing loss better than conventional OAE protocols have. 2f1-f2 distortion-product OAEs and stimulus-frequency OAEs were evoked with rapidly sweeping tones in 300 normal and impaired ears. Metrics included OAE amplitude for fixed-level stimuli as well as slope and compression features derived from OAE input/output functions. Results show that mild-moderate hearing loss impacts distortion and reflection emissions differently. Clinical decision theory was applied using OAE metrics to classify all ears as either normal-hearing or hearing-impaired. Our best OAE classifiers achieved 90% or better hit rates (with false positive rates of 5%–10%) for mild hearing loss, across a nearly five-octave range. In summary, results suggest that distortion and reflection emissions have distinct sensitivities to hearing loss, which supports the use of a joint-OAE approach for diagnosis. Results also indicate that analyzing both reflection and distortion OAEs together to detect mild hearing loss produces outstanding accuracy across the frequency range, exceeding that achieved by conventional OAE protocols.
Dissertations / Theses on the topic "OAE3"
1
MINIATI, FRANCESCO. "CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY AND PALEOECOLOGY OF THE LATE TURONIAN TO EARLY CAMPANIAN INTERVAL AND OF OCEANIC ANOXIC EVENT 3." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/826218.
Full textAbstract:
Il Cretacico si caratterizza per la presenza di diversi intervalli di alterazione del sistema climatico-oceanico a scala globale responsabili della deposizione di black-shale marini ricchi di carbonio, definiti come Eventi Anossici Oceanici (OAEs). L’OAE3 rappresenta l’ultimo episodio di diffusa anossia durante l’intervallo Coniaciano-Santoniano. Rispetto ai precedenti eventi anossici, l’OAE3 ha una estensione regionale, ma non globale, poiché risulta essere confinato all’Oceano Atlantico sud-equatoriale e ad alcuni bacini limitrofi (es: Bacino Caraibico, Bacino del Western Interior). Altre importanti differenze fra l’OAE3 e i precedenti eventi anossici consistono nell’assenza di una anomalia del δ13C, ma piuttosto il verificarsi durante il Coniaciano-Santoniano di una serie di escursioni isotopiche sia positive che negative di piccola entità. Inoltre la deposizione di sedimenti ricchi di materia organica (black shales) sembra essere diacrona anche all’interno dello stesso Atlantico centro-meridionale. I principali obiettivi di questa tesi sono la ricostruzione di eventuali cambiamenti paleoceanografici avvenuti durante l’OAE3 in base alle variazioni di abbondanza e composizione delle associazioni a nannofossili calcarei.
Il mio progetto di dottorato si è concentrato sulla biostratigrafia e paleoceanografia a nannofossili calcarei per l’intervallo compreso tra il tardo Turoniano e il Campaniano inferiore (Cretacico Superiore) e in particolare sul Coniaciano-Santoniano. La studio delle associazioni a nannofossili calcarei sia in termini semiquantitativi che quantitativi ha permesso di ottenere una biostratigrafia di dettaglio utile a datare e correlare le variazioni del nannoplancton calcareo durante l’OAE3.
Lo studio è stato condotto sia su siti oceanici carotati nell’ambito dei progetti Deep Sea Drilling Project (DSDP) e Ocean Drilling Program (ODP) che su sezioni continentali, situate nell’Atlantico sud-equatoriale, in Oceano Indiano e nel Bacino Anglo-Parigino. I risultati ottenuti sono stati poi integrati con dati di letteratura al fine di ottenere una successione di eventi per il Coniaciano-Santoniano e fornire una caratterizzazione paleoceanografica dell’OAE3.
È stata realizzata una dettagliata revisione tassonomica per risolvere alcune incongruenze tassonomiche e ottenere una terminologia aggiornata e unificata. Questa è stata la base per una biostratigrafia coerente, ad alta risoluzione delle successioni studiate, e stabilire una datazione e correlazione a scala sovra-regionale. Sono state applicate le quattro biozonazioni standard proposte per il Cretacico Superiore per ottenere la massima risoluzione e testare la loro applicabilità nei diversi bacini e contesti oceanografici.
Le analisi quantitative delle associazioni a nannofossili calcarei hanno permesso di caratterizzare la distribuzione dei nutrienti prima, durante e dopo l’OAE3. La distribuzione dei taxa indicativi di più alta fertilità mostra caratteristiche diverse per le varie successioni, suggerendo che l’OAE3 non è stato caratterizzato da un episodio globale di fertilizzazione. Infatti, la fertilità rimane in genere bassa ad eccezione delle aree di upwelling che sono caratterizzate da condizioni meso-eutrofiche anche negli intervalli che precedono e seguono l’OAE3.
Le analisi quantitative condotte in questo studio hanno evidenziato la presenza di ampie fluttuazioni di abbondanza dei generi Micula e Marthasterites durante il Coniaciano-Santoniano. Questi picchi di abbondanza possono essere correlati con eventi analoghi descritti in letteratura, anche se con valori di incremento differenti nei vari siti. Durante l’OAE3 sono stati individuati due distinti picchi di abbondanza di Marthasterites (M. furcatus) e cinque di Micula (M. staurophora). L’affinità paleoecologica di Micula, e in particolare M. staurophora, così come quella del genere Marthasterites
rimane poco chiara, pertanto le cause dei loro picchi di abbondanza devono essere individuate. Tuttavia, le fluttuazioni nelle associazioni a nannofossili calcarei indicano un profondo cambiamento paleoceanografico durante il Coniaciano-Santoniano.
L’inizio dell’OAE3 coincide con un elevato aumento in abbondanza (e localmente dominanza) di
M. furcatus, che suggerisce il rapido instaurarsi di nuove e peculiari condizioni paleoceanografiche ad ampia scala. Le condizioni paleoceanografiche più alterate sono raggiunte nella parte centrale dell’OAE3 con un picco di abbondanza (climax) di M. staurophora sincrono a scala globale.
Oltre al loro valore per le ricostruzioni paleoambientali, i picchi di abbondanza di Micula and Marthasterites si sono rilevati estremamente utili per complementare/implementare la caratterizzazione biostratigrafica dei limiti Turoniano/Coniaciano, Coniaciano/Santoniano e Santoniano/Campaniano. Questi picchi di abbondanza potrebbero dunque essere introdotti come eventi addizionali in future zonazioni a nannofossili calcarei del Cretacico Superiore.<br>The Late Cretaceous was punctuated by several periods of global perturbations of the climate-ocean system that lead to widespread organic carbon-rich marine black shale deposition, termed Oceanic Anoxic Events (OAEs). The OAE3 represents the last episode of anoxia dated as Coniacian-Santonian. Compared to previous anoxic events, OAE3 has a regional extension, rather than a global significance, since it is confined to the equatorial-south Atlantic Ocean and adjacent basins (e.g. Caribbean Basin,
Western Interior Basin). Another major difference of OAE3 relative to previous OAEs resides in the absence of a prominent δ13C anomaly, but the occurrence of several minor positive and negative excursions in the Coniacian-Santonian interval. Moreover, the deposition of organic carbon-rich sediments (black shales) seems to be diachronous even in the central-south Atlantic Ocean.
This PhD project focused on calcareous nannofossil biostratigraphy and paleoceanography of the Late Turonian to Early Campanian time interval (Late Cretaceous), and specifically of the Coniacian-Santonian. Nannofossil assemblages were investigated semiquantitatively and quantitatively to obtain a detailed biostratigraphic framework for assessing the paleoenvironmental changes across OAE3. The study was performed on Deep Sea Drilling Project (DSDP) and Ocean Drilling Program (ODP) sites and on-land sections, situated in the equatorial and south Atlantic Ocean, the Indian Ocean and the
Anglo-Paris Basin. The results of my investigation were integrated with data from literature in order to achieve a solid framework of events for the Coniacian-Santonian time interval and provide a paleoceanographic characterization of OAE3. A detailed revision of the taxonomy was accomplished for solving a few taxonomic incongruities and obtain a unified updated nomenclature. This was the basis for the coherent high-resolution biostratigraphy of the selected sites, in order to establish dating and correlations at supra-regional scale. The four standards biozonation schemes available for the Upper Cretaceous were applied to attain the maximum resolution and test their individual applicability in different oceanic basins and oceanographic settings. The major objective of this PhD thesis was the reconstruction of presumed paleoceanographic changes across OAE3 as recorded by abundance and composition of calcareous nannofossil assemblages. Quantitative analyses of calcareous nannofossil assemblages allowed the characterization of paleotemperature and nutrient changes prior, during and after OAE3. Nannofossil-based paleotemperature obtained in this study and documented in the literature do not show significant changes in the studied successions, perhaps due to unresolved unambiguous temperature-related taxa in the Late Cretaceous and/or minor (subtle) temperature changes across OAE3. As far as paleofertility isconcerned, the nannofossil taxa indicative of higher nutrient content display very different patterns at
the various sites, suggesting that OAE3 was not characterized by a global fertilization episode. Indeed, fertility remained globally low with the exception of upwelling areas characterized by meso-eutrophic conditions also in the intervals preceding and following OAE3. The quantitative analyses conducted in this study pointed out relatively large fluctuations in abundance of genera Micula and Marthasterites in the Coniacian-Santonian interval. These abundance peaks could be correlated with analogous events described in the literature, even if with different values of abundance at the various sites/sections. Two Marthasterites (M. furcatus) abundance peaks and five Micula (M. staurophora) abundance peaks were distinguished across OAE3. The paleoecological affinity of Micula,
and specifically M. staurophora, as well as that of genus Marthasterites remains unexplained, so the causes of their abundance peaks continue to be elusive. However, the distinctive fluctuations in nannofossil assemblages indicate profound paleoceanographic changes during the Coniacian-Santonian. The onset of OAE3 coincides with a major increase in abundance (and locally dominance) of M. furcatus suggesting the rapid establishment of new and peculiar paleoceanographic conditions at widespread to
global scale. The most altered paleoceanographic conditions were reached in the core of OAE3 with the synchronous maximum abundance (climax) of M. staurophora at global scale. In addition to their value for paleoenvironmental reconstructions, the identified Micula and Marthasterites abundance peaks turned out to be extremely useful for complementing/implementing the
biostratigraphic characterization of the Turonian/Coniacian, Coniacian/Santonian and Santonian/Campanian boundaries and might be introduced as additional events in future nannofossil zonations for the Late Cretaceous.
2
Munns, Denton R. "Drug interactions with the human organic anion transporter 3, OAT3." Diss., Search in ProQuest Dissertations & Theses. UC Only, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1465498.
Full text
3
Braun, Christina [Verfasser]. "Expressionsregulation der organischen Anionentransporter OAT1 und OAT3 im Ischämie-Reperfusions-Modell / Christina Braun." Halle, 2018. http://d-nb.info/116913274X/34.
Full text
4
Muñoz, Moscoso Yina Fernanda. "Modelos de degradação para aplicação em sistemas de gerenciamento de Obras de Arte Especiais – OAEs." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/24573.
Full textAbstract:
Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, 2017.<br>Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2017-08-03T16:09:23Z
No. of bitstreams: 1
2017_YinaFernandaMuñozMoscoso.pdf: 5763922 bytes, checksum: a876b7cd82d88c5b67bb1392ea2cbf79 (MD5)<br>Approved for entry into archive by Raquel Viana (raquelviana@bce.unb.br) on 2017-09-19T14:55:07Z (GMT) No. of bitstreams: 1
2017_YinaFernandaMuñozMoscoso.pdf: 5763922 bytes, checksum: a876b7cd82d88c5b67bb1392ea2cbf79 (MD5)<br>Made available in DSpace on 2017-09-19T14:55:08Z (GMT). No. of bitstreams: 1
2017_YinaFernandaMuñozMoscoso.pdf: 5763922 bytes, checksum: a876b7cd82d88c5b67bb1392ea2cbf79 (MD5)
Previous issue date: 2017-09-19<br>São apresentados os resultados de uma pesquisa que teve como objetivo propor um modelo de previsão da degradação, baseada numa análise determinística e estocástica, para contribuir no acompanhamento das Obras de Arte Especiais – OAEs do Brasil, sob responsabilidade do Departamento Nacional de Infraestrutura de Transporte – DNIT, e para banco de dados similares. No banco de dados do DNIT consta o inventário de quatro mil quinhentos e trinta e uma OAEs, com uma vistoria realizada entre 2012 a 2016 para todas as obras do inventario. Devido ao número insuficiente de registros históricos para o desenvolvimento de um modelo de previsão da degradação das OAEs, foram testados os modelos de degradação utilizando-se o banco de dados do Departamento de Transporte de Nevada (NDOT), obtido durante um ano de estágio desenvolvido na Universidade de Nevada, Las Vegas (USA). Foi realizado um estudo comparativo dos modelos de degradação, e após a calibragem dos modelos de previsão com o banco de dados de NDOT, foi determinado o modelo de degradação mais apropriado para as OAEs sob responsabilidade do DNIT e banco de dados similares, visando proporcionar apoio na tomada de decisões e garantir um desempenho eficiente das estruturas. Foi determinado que a Regressão de Potência é o método de cálculo mais apropriado para a estimação das curvas de degradação das OAEs no Brasil, sob responsabilidade do DNIT. Podendo-se utilizar esta regressão de maneira individual para cada uma das OAEs, uma vez sejam realizadas mais inspeções nas estruturas.<br>The objective of this research was to propose a degradation prediction model, based on a deterministic and stochastic analysis, to contribute to the accompaniment of the Brazil Bridges, under the responsibility of the National Department of Transport Infrastructure - DNIT, and other similar databases. In the DNIT database there is an inventory of four thousand five hundred and thirty-one bridges, but only one inspection was carried out between 2012 and 2016. Due to the insufficient number of historical records for the development of a model for predicting the degradation of bridges, the models of degradation were tested using the database of the Department of Transportation of Nevada (NDOT), obtained during a year of internship developed at the University of Nevada, Las Vegas (USA). A comparative study of the degradation models was carried out, and after the calibration of the forecast models with the NDOT database, the most appropriate degradation model was determined for the bridges under the responsibility of DNIT and similar databases, aiming to provide support in decision-making and ensure efficient performance of structures. It was determined that the Power Regression is the most appropriate calculation method for the estimation of the degradation curves of OAEs in Brazil, under the responsibility of DNIT. This regression can be used individually for each of the OAEs, once more inspections are performed on the structures.
5
Brehin, Anne-Claire. "La protéine OAS3 de la voie interferon inhibe la réplication du virus chikungunya dans les cellules humaines." Paris 7, 2008. http://www.theses.fr/2008PA077082.
Full textAbstract:
Chez l'Homme, l'infection par le virus chikungunya (CHIK), un membre du genre Alphavirus de la famille des Togaviridae, se manifeste classiquement par des arthralgies aiguës. La flambée inattendue de fièvre chikungunya dans les îles de l'Océan Indien en 2006 mis en exergue la nécessité de comprendre la pathogénie de cette maladie peu étudiée. La caractérisation moléculaire de plusieurs isolats cliniques collectés sur l'Ile de La Réunion mis en évidence l'émergence du variant viral E1-226V associé à l'adaptation au vecteur Ae. Albopictus. Pour poursuivre cette caractérisation, nous avons produit des outils spécifiques pour la détection du virus CHIK comme une forme soluble de la glycoprotéine d'enveloppe E2 (gp-E2) ainsi que des anticorps monoclonaux murins spécifiques de la gp-E2 du virus. Chez les individus infectés par les alphavirus dont le virus CHIK, l'infection virale est contrôlée par l'IFN-α/β. Qui stimule la production d'un ensemble de molécules antivirales. Nos travaux suggèrent qu'une famille de ces gènes, les 2',5'-Oligoadenylate Synthétases (OAS), joue un rôle primordial dans l'immunité innée anti-arbovirale. Nous avons étudié si l'isoforme OAS3 humaine joue un rôle contre l'infection par le virus CHIK. Les cellules épithéliales humaines surexprimant l'OASS inhibent efficacement la croissance du virus CHIK aussi bien que d'autres alphavirus comme les virus Sindbis et Semliki Forest. Cette activité anti-alphavirale empêche l'accumulation des ARN viraux et des protéines virales. En conclusion, l'activité de la protéine OAS3 représente une importante voie anti-alphavirale par laquelle l'IFN-α/β contrôle l'infection du virus CHIK dans les cellules humaines<br>Humans infected with chikungunya virus (CHIKV), a member of the Alphavirus genus of the Togaviridae family, typically experience acute illness with incapaciting polyarthralgia. The unexpected outbreak of chikungunya fever in the Indian Ocean islands in 2006 highlights the need to understand this disease pathogenesis not well studied. Several clinical isolates collected in La Reunion Island were characterized at the molecular level. Our study emphasized the emergence of the viral variant E1-226V associated with adaptation to the vector Ae. Albopictus. The production of specific tools for the CHIK virus detection was necessary to pursue this characterization. We produced a soluble form of the envelope E2 glycoprotein (gp-E2) in Drosophila S2 cells, as well as mouse monoclonal antibodies specific of the virus gp-E2. In people infected by alphavirus such as CHIK virus, the viral infection is controlled by IFN-α/βwhich stimulates the production of a set of antiviral molecules. Our laboratory had shown that the 2', 5'-Oligoadenylate Synthetases (OAS) genes, inducible by IFN-α, play a critical role in antiviral immunity against arboviruses. Whether the OAS3 human form may play a role in the protective innate immunity to CHIKV was investigated. Human epithelial cells respond to ectopic OAS3 protein expression by inhibiting CHIKV growth as efficiently as that of other alphaviruses such as Sindbis and Semliki Forest viruses. The OAS-mediated inhibition of CHIKV growth was attributable to a dramatic reduction in viral RNA and protein levels. In conclusion, OAS3 activity represents an important antialphaviral pathway by which IFN-α/β controls CHIKV infection in human cells
6
DEL, VISCIO Gabriella. "Chondrodonta (Bivalvia) proliferation in peri-Adriatic shallow-water carbonates: a bioevent preluding the Cretaceous OAE1a and OAE2." Doctoral thesis, Università degli studi di Ferrara, 2021. http://hdl.handle.net/11392/2478848.
Full textAbstract:
La Chondrodonta, un bivalve simil-ostreide e opportunista, è comunemente riportata nelle piattaforme carbonatiche Tetidee del Cretaceo, con una particolare concentrazione nel periodo Aptiano – Cenomaniano. Nonostante ciò, non è ancora emersa una chiara relazione né temporale né causale tra la proliferazione di questo bivalve e gli Eventi Anossici Oceanici (OAEs).
Per tali ragioni, la distribuzione stratigrafica e il significato paleoecologico della Chondrodonta sono stati analizzati ai fini di stabilire un preciso rapporto temporale tra i suoi accumuli e gli OAEs e di definire le possibili perturbazioni ambientali alla base della sua proliferazione.
Gli accumuli di Chondrodonta analizzati affiorano nelle successioni carbonatiche di piattaforma interna della Piattaforma Apula (Aptiano inferiore, a ridosso dell’OAE1a), e della Piattaforma Adriatica (Cenomaniano superiore, a ridosso dell’OAE2). Il contesto stratigrafico intorno agli accumuli è stato ricostruito attraverso analisi bio- e chemostratigrafiche. Analisi sedimentologico-litostratigrafiche e geochimiche (concentrazione di elementi maggiori, in traccia e di Terre Rare) hanno permesso di dedurre le variazioni paleo-ambientali associate alla proliferazione del bivalve.
Sulla base della correlazione dei record isotopici tra piattaforma e bacino, si è osservato come gli accumuli di Chondrodonta ricadano al di sotto delle tipiche escursioni nella curva del δ13C che segnano, rispettivamente, l’inizio dell’OAE1a e dell’OAE2. In entrambe le successioni studiate, la Chondrodonta appare subordinata all’interno dei calcari a rudiste e raggiunge una fase di massima proliferazione e predominanza sulle stesse rudiste in prossimità dell’inizio degli eventi anossici. Dalle analisi stratigrafiche e geochimiche è emerso come gli intervalli di proliferazione di Chondrodonta siano caratterizzati da un aumento di nutrienti oltre la soglia di tollerabilità per le rudiste, e da fluttuazioni nell’ossigenazione e nell’apporto terrigeno in acque di bassa energia.
Gli intervalli a Chondrodonta sono stati correlati anche ad una crescente fertilità e ad un progressivo deterioramento ambientale nelle vicine aree bacinali. La posizione stratigrafica degli accumuli globali di Chondrodonta precede l’inizio degli OAE1a e 2 in piattaforme carbonatiche poste a differenti latitudini e condizioni climatiche, permettendo di considerare la proliferazione di questo bivalve come un bioevento a scala regionale.
La proliferazione di Chondrodonta risulta quindi inseribile all’interno di una “finestra ambientale”, innescata dai cambiamenti climatici che preludono gli OAEs e principalmente caratterizzata da un aumento di nutrienti sulle piattaforme carbonatiche. Il bivalve opportunista Chondrodonta beneficia, infatti, della transizione da condizioni oligotrofiche a mesotrofiche in piattaforma, occupando una nicchia ecologica posta al passaggio tra comunità stenotopiche ed euritopiche.
La presenza e la durata della “finestra ambientale” sono controllate anche da condizioni paleo-geografiche e idrodinamiche locali così come da locali fluttuazioni nell’ossigenazione delle acque e negli apporti terrigeni.
L’eccessivo deterioramento delle condizioni ambientali all’inizio degli OAEs inibisce, per contro, la proliferazione della Chondrodonta provocando la sua scomparsa dalla comunità bentonica in favore di specie propriamente mesotrofiche come dimostrato per la Chondrodonta dell’Aptiano inferiore all’inizio dell’OAE1a.
La proliferazione della Chondrodonta rappresenta, quindi, un marker stratigrafico a scala regionale del crescente stress ambientale in piattaforma. La predominanza transitoria della Chondrodonta all’interno della comunità bentonica costituisce la risposta biologica dei sistemi carbonatici di acque basse al crescente deterioramento ambientale che culmina con gli Eventi Anossici Oceanici 1a e 2 del Cretaceo.<br>The opportunistic, oyster-like bivalve Chondrodonta, common in Tethyan Cretaceous shallow-water carbonates, shows peaks of concentration during the Aptian – Cenomanian time interval. Despite this, neither a temporal nor a causal relationship between the flourishing of this bivalve and Oceanic Anoxic Events (OAEs) has emerged yet.
The stratigraphic distribution and the ecological significance of Chondrodonta have been analyzed to both define the timing between its accumulations and OAEs and infer OAE-related environmental perturbations triggering its proliferation.
The studied Chondrodonta accumulations occur in inner platform limestones of the lower Aptian Apulia Carbonate Platform straddling OAE1a, and of the upper Cenomanian Adriatic Carbonate Platform straddling OAE2. The stratigraphic framework around the Chondrodonta beds has been built using biostratigraphic and chemostratigraphic data. Palaeoenvironmental changes associated with its proliferation have been inferred by coupling sedimentologic-lithostratigraphic analyses with the concentration of major, trace elements and REE.
Based on platform-to-basin stratigraphic correlations, the lower Aptian Chondrodonta beds occur right below the negative δ13C excursion marking the onset of OAE1a and the upper Cenomanian beds occur below the δ13C positive excursion of the OAE2 interval. In both cases, Chondrodonta appears in the stratigraphic succession associated with rudist limestones and then reaches a phase of maximum proliferation and predominance over rudists at the prelude of OAEs.
As emerged by stratigraphic and geochemical analyses, the Chondrodonta proliferation occurred in an interval of increasing nutrients and in low-energy seawaters with fluctuating oxygenation and intermittent terrigenous inputs. These environmental changes prevented the settlement of the less tolerant rudists while they promoted the thriving of Chondrodonta in monospecific (or quasi-) benthic communities close to the onset of OAEs.
The intervals of Chondrodonta proliferation also correlate to increasing fertility and environmental deterioration in the nearby basins. Further, the stratigraphic position of lower Aptian and upper Cenomanian Chondrodonta accumulations in worldwide carbonate platforms located at different palaeolatitudes and climates, generally predates the onset of OAEs and enables to consider the proliferation of this bivalve as a regional bioevent. Accordingly, the flourishing of Chondrodonta is ascribable within an environmental “window”, triggered by the changing climate preluding OAEs and mainly resulted in nutrient pulses on the platforms top. The opportunistic behavior of Chondrodonta was rather efficient in the transition from oligo- to mesotrophic conditions in shallow-water carbonate areas. This oyster-like bivalve benefitted from this environmental instability and occupied a short-lived environmental niche between more stable, stenotopic and eurytopic benthic communities.
The occurrence and duration of this environmental “window” were also controlled by local, quick fluctuations in other seawater parameters (e.g., oxygenation, terrigenous inputs) and by limiting environmental factors related to palaeogeography and hydrodynamics.
However, further increase of inhospitable conditions leading to OAEs inhibited the proliferation of the bivalve, allowing fully mesotrophic taxa to dominate the benthic community. This is particularly demonstrated for the early Aptian Chondrodonta, abruptly outpaced by mesotrophic assemblages at the onset of OAE1a.
The proliferation of Chondrodonta can be, therefore, used as a regional stratigraphic marker for an early phase of environmental stress in shallow-water carbonate platforms. Its transitionary predominance within the benthic community represents the biotic response of the Cretaceous shallow-water carbonate systems to increasing environmental deterioration peaking with Oceanic Anoxic Events 1a and 2.
7
Silwal, Pramit. "ONTOLOGY ALIGNMENT USING SEMANTIC SIMILARITY WITH REFERENCE ONTOLOGIES." Miami University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1357171995.
Full text
8
Smurzynski, Jacek. "Otoacoustic Emissions: The Influence of the Middle-ear Function, SFOAEs, and OAEs as a Diagnostic Predictor for Cochlear Impairment." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2160.
Full text
9
FERRARO, SERENA. "Oceanic Anoxic Event (OAE) 1b (late Aptian - early Albian): evolutionary, palaeoecological, palaeoceanographic and palaeoclimatic implication." Doctoral thesis, Urbino, 2018. http://hdl.handle.net/11576/2656846.
Full text
10
Gouveia, João José de Simoni. "Estudo de associação entre microssatélites localizados no cromossomo OAR3 e características de crescimento e resistência aos nematódeos gastrintestinais em ovinos." Universidade Federal de São Carlos, 2008. https://repositorio.ufscar.br/handle/ufscar/5455.
Full textAbstract:
Made available in DSpace on 2016-06-02T20:21:21Z (GMT). No. of bitstreams: 1
2152.pdf: 1768000 bytes, checksum: bfe924ab33d5d72de49d9edd1a2c9176 (MD5)
Previous issue date: 2008-08-15<br>Financiadora de Estudos e Projetos<br>The sheep production has been growing surprinsingly in the last years in Brazil, but in despite of this, it can not be considered competitive yet, principally because the lack of structure and organization of the sector. Among the problems
faced by the Brazilian sheep producers we could cite the gastrointestinal parasites and the relatively low productivity of the native breeds when compared with the exotic ones. The knowledge of the genetic factors controlling these traits can help in the improvement of then without impair the correlated traits. Through molecular biology and statistical technics is possible to identify genes/chromosomal regions associated with these traits and once the region is confirmed as really important in the control of the characteristic this information could be used in breeding programs through marker assisted selection. Many regions were identified as candidate for growth and nematode resistance traits in sheep and other ruminants, and among of them is the Q arm of the sheep chromosome OAR3. Because of this, the aim of this study was to investigate three microssatelite markers located in the Q arm of the OAR3 and its relationship with growth and nematode resistance traits in sheep from three genetic
groups: Santa Inês X Santa Inês, Dorper X Santa Inês e Suffolk X Santa Inês. The association analysis revealed two alleles of the BL4 marker with significative effect in the Santa Inês x Santa Inês genetic group and one allele form the same marker with significative effect in the genetic group Dorper x Santa Inês on birth weight. It was also observed one allele from the BL4 marker associated with slaughter weight in the
Santa Inês x Santa Inês genetic group. We did not observe any association between the markers studied and nematode resistance. Our results suggest that there are one or more genes in the studied region related with growth traits, but more studies are required to confirm the importance of this region in the control of these traits and to identificate the candidate genes.<br>A ovinocultura, apesar de apresentar um crescimento significativo nos últimos anos, ainda não pode ser considerada no Brasil como uma exploração competitiva. Isto se deve principalmente pela falta de organização e estruturação do setor produtivo. Dentre os problemas da ovinocultura nacional podemos citar as parasitoses gastrintestinais e a baixa produtividade das raças locais quando comparadas com raças importadas. O entendimento dos fatores genéticos que controlam as características produtivas pode auxiliar na melhoria dos rebanhos para uma característica importante sem significar prejuízo a outras características. Através de técnicas de biologia molecular e estatística pode-se identificar
genes/regiões cromossômicas responsáveis pelo controle dessas características e uma vez que essas regiões sejam identificadas e comprovadas como importantes, essa informação pode ser utilizada em programas de melhoramento genético através de seleção assistida por marcadores. Algumas regiões já foram identificadas como sendo candidatas a conter genes importantes tanto para resistência aos nematódeos gastrintestinais quanto para características de crescimento em ovinos e outras espécies de ruminantes. Dentre estas regiões está o braço Q do cromossomo OAR3 dos ovinos. Por isso, o objetivo deste trabalho foi estudar três marcadores microssatélites localizados no braço Q do cromossomo ovino OAR3 e suas relações com as características de crescimento (peso ao nascimento e peso ao abate) e resistência aos nematódeos gastrintestinais utilizando ovinos pertencentes a três grupos genéticos (Santa Inês X Santa Inês, Dorper X Santa Inês e Suffolk X Santa Inês). A análise de associação revelou a presença de dois alelos do marcador BL4 com efeito significativo no grupo genético Santa Inês x Santa Inês e um alelo do mesmo marcador com efeito significativo no grupo genético Dorper x Santa Inês para peso ao nascimento. Também foi observado efeito de um alelo do marcador BL4 com efeito significativo no grupo genético Santa Inês x Santa Inês para peso ao abate. Não foi observado efeito significativo de nenhum marcador na característica de resistência aos nematódeos gastrintestinais. Os resultados deste trabalho sugerem a presença de um ou mais genes na região estudada para características de crescimento, porém mais estudos são necessários para confirmar a real importância desta região no controle destas características bem como a identificação de possíveis genes candidatos.
Books on the topic "OAE3"
1
Giamarellos, Iōan. Asphalistiko dikaio kai paroches OAED: Kōdikopoiēsē diataxeōn. Ekdoseis Aphoi P. Sakkoula, 1994.
Find full text
3
N, Vinokurov I͡U︡, Podgornova N. P, and Ivanov A. N, eds. Dokumenty i materialy OAE: 1987-1989 gg. Akademii͡a︡ nauk SSSR, In-t Afriki, 1990.
Find full text
4
Khachim, F. I. Konstitut͡s︡ionnoe pravo stran Blizhnego Vostoka: Iran, Egipet, Izrailʹ, OAĖ, Irak. Izd-vo Rossiĭskogo universiteta druzhby narodov, 2001.
Find full text
5
Otoacoustic emissions (OAEs). American Academy of Otolaryngology--Head and Neck Surgery Foundation, 1997.
Find full text
6
Otoacoustic emissions (OAEs). 2nd ed. American Academy of Otolaryngology--Head and Neck Surgery Foundation, 2001.
Find full textBook chapters on the topic "OAE3"
1
Shoup, Victor. "OAEP Reconsidered." In Advances in Cryptology — CRYPTO 2001. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-44647-8_15.
Full text
2
Tirona, Rommel G. "OATP1A2, OAT1, and OAT3." In Pharmacogenomics of Human Drug Transporters. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118353240.ch6.
Full text
3
Walger, M., and S. Hoth. "Otoakustische Emissionen (OAE)." In Objektive Audiometrie im Kindesalter. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-44936-9_4.
Full text
4
Boldyreva, Alexandra, and Marc Fischlin. "On the Security of OAEP." In Advances in Cryptology – ASIACRYPT 2006. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11935230_14.
Full text
5
Pointcheval, David. "OAEP: Optimal Asymmetric Encryption Padding." In Encyclopedia of Cryptography and Security. Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-5906-5_150.
Full text
6
Jia, Dingding, Bao Li, Xianhui Lu, and Yamin Liu. "RSA-OAEP is RKA Secure." In Information Security and Cryptology. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-12087-4_17.
Full text
7
Boldyreva, Alexandra. "Strengthening Security of RSA-OAEP." In Topics in Cryptology – CT-RSA 2009. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00862-7_27.
Full text
8
Pointcheval, David. "OAEP: Optimal Asymmetric Encryption Padding." In Encyclopedia of Cryptography, Security and Privacy. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-030-71522-9_150.
Full text
9
Stowers, Lisa, Sandeepa Dey, Vladana Vukojević, Yu Ming, and Lars Terenius. "Ovarian Cancer Antigen OA3." In Encyclopedia of Signaling Molecules. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0461-4_100967.
Full text
10
Cao, Nairen, Adam O’Neill, and Mohammad Zaheri. "Toward RSA-OAEP Without Random Oracles." In Lecture Notes in Computer Science. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45374-9_10.
Full textConference papers on the topic "OAE3"
1
MOTTA, MARIANA MARETTO, ISIS CLER DEPOLLI, PEDRO HENRIQUE AVANCINI GUIMARÃES, and MARIA JULIANA ANASTÁCIO SANTANA. "INSPEÇÕES EM OBRAS DE ARTE ESPECIAIS DA MALHA RODOVIÁRIA DO ESPÍRITO SANTO." In Anais da 49ª Reunião Anual de Pavimentação - RAPv. Even3, 2024. http://dx.doi.org/10.29327/1430212.49-74.
Full textAbstract:
O Departamento de Edificações e de Rodovias do Espírito Santo (DER-ES), a fim de levantar a atual situação de todas as Obras de Arte Especiais (OAE) existentes na malha rodoviária sob sua administração, realizou a contratação de serviços técnicos especializados de pesquisa, cadastro, inspeção cadastral e avaliação de todas as pontes com base na ABNT NBR 9452 (2019), DNIT 010 PRO (2004) e no Manual de Inspeções de Pontes Rodoviárias – DNIT. As inspeções que estão sendo realizadas consistem na verificação visual das características geométricas e estruturais, das manifestações patológicas e das anomalias nas estruturas e em seus elementos. A partir dos resultados está sendo elaborado um plano de manutenção e reabilitação das estruturas. Até o momento, 722 pontes já foram inspecionadas por todo o estado, indicando desde estruturas em excelentes condições até obras com riscos iminentes de colapso. A maior parte das OAE vistoriadas foram classificadas com condição de estabilidade boa e aparentemente boa, sendo observado que as estruturas com notas inferiores, classificadas como precárias e sofríveis, estão concentradas na região Sul do estado. Ações urgentes foram planejadas e estão sendo executadas para os casos mais graves. Para as estruturas com danos mais brandos estão sendo elaboradas planilhas, que objetivam a contratação de serviços de manutenção e conservação. O DER-ES visa manter um monitoramento regular das pontes sob sua responsabilidade, via inspeções regulares a fim de garantir a segurança e a funcionalidade interrupta da malha rodoviária estadual.
2
Azam, Saifaris Azizi Bin Saiful, Syed Farid Syed Adnan, and Muhammad Asyraf Asbullah. "Performance Comparison Of Rabin-p And RSA-OAEP Encryption Scheme In Securing Data On Cloud." In 2024 14th International Conference on System Engineering and Technology (ICSET). IEEE, 2024. https://doi.org/10.1109/icset63729.2024.10774588.
Full text
3
Zhou, Junsheng, Xin Wen, Baorui Ma, et al. "3D-OAE: Occlusion Auto-Encoders for Self-Supervised Learning on Point Clouds." In 2024 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2024. http://dx.doi.org/10.1109/icra57147.2024.10610588.
Full text
4
Choi, Youngwon, and Joong-Ho Won. "Ornstein Auto-Encoders." In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/301.
Full textAbstract:
We propose the Ornstein auto-encoder (OAE), a representation learning model for correlated data. In many interesting applications, data have nested structures. Examples include the VGGFace and MNIST datasets. We view such data consist of i.i.d. copies of a stationary random process, and seek a latent space representation of the observed sequences. This viewpoint necessitates a distance measure between two random processes. We propose to use Orstein's d-bar distance, a process extension of Wasserstein's distance. We first show that the theorem by Bousquet et al. (2017) for Wasserstein auto-encoders extends to stationary random processes. This result, however, requires both encoder and decoder to map an entire sequence to another. We then show that, when exchangeability within a process, valid for VGGFace and MNIST, is assumed, these maps reduce to univariate ones, resulting in a much simpler, tractable optimization problem. Our experiments show that OAEs successfully separate individual sequences in the latent space, and can generate new variations of unknown, as well as known, identity. The latter has not been possible with other existing methods.
5
Allam, S., I. Ferreira, B. Fahmi, S. Yusmananto, and A. Koeshidayatullah. "AI-assisted Oceanic Anoxic Events (OAEs) identification and prediction: A case from the Late Cretaceous OAE-2." In 84th EAGE Annual Conference & Exhibition. European Association of Geoscientists & Engineers, 2023. http://dx.doi.org/10.3997/2214-4609.202310364.
Full text
6
SANDU, Veronica, and Angela MALANIUC. "Open Access to educational resources." In "Ştiință și educație: noi abordări și perspective", conferinţă ştiinţifică internaţională. Ion Creangă Pedagogical State University, 2024. https://doi.org/10.46727/c.v4.21-22-03-2024.p308-313.
Full textAbstract:
The article explores the concept of Open Access to Educational Resources (OAER) and its impact in the educational context. It analyzes the evolution and significance of OAER in facilitating free access to educational materials, including textbooks, online courses, and other relevant resources. The benefits of OAER for various user categories, ranging from students to educators and educational institutions, are discussed. The article highlights the challenges and opportunities associated with the implementation of OAER and underscores its key role in democratizing education and promoting equal opportunities in learning. By examining current trends and relevant initiatives, the article provides a comprehensive perspective on how OAER contributes to the transformation of the educational landscape, opening doors to knowledge and learning for all.
7
Ludvigson, Greg A., Anthony L. Layzell, Robert Joeckel, Andreas Möller, and Rolfe D. Mandel. "CHEMOSTRATIGRAPHIC PROFILES OF THE CRETACEOUS OAE 1D, MID-CENOMANIAN EVENT, AND OAE2 FROM LONG-LINE DRILLCORES, CRATONIC MARGIN OF THE NORTH AMERICAN WESTERN INTERIOR BASIN." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-338796.
Full text
8
Schartner, Peter. "A low-cost alternative for OAEP." In the International Workshop. ACM Press, 2011. http://dx.doi.org/10.1145/2349913.2349914.
Full text
9
Liu, Jie, Gongliang Chen, and Jianhua Li. "Revision of Security Proof on f-OAEP." In 2008 International Conference on Information Security and Assurance ISA. IEEE, 2008. http://dx.doi.org/10.1109/isa.2008.38.
Full text
10
SHERA, CHRISTOPHER A., ARNOLD TUBIS, and CARRICK L. TALMADGE. "FOUR COUNTER-ARGUMENTS FOR SLOW-WAVE OAEs." In Proceedings of the Ninth International Symposium. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812773456_0071.
Full textReports on the topic "OAE3"
1
Gallmeier, F. X., J. S. Tang, and R. T. III Primm. MCNP-model for the OAEP Thai Research Reactor. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/677116.
Full text
2
Turner, S., D. Brown, K. Yiu, R. Housley, and T. Polk. Updates for RSAES-OAEP and RSASSA-PSS Algorithm Parameters. RFC Editor, 2010. http://dx.doi.org/10.17487/rfc5756.
Full text
3
Schartau, Markus, Tronje Peer Kemena, Vanessa Lampe, Jan Taucher, and Miriam Seifert. New/refined parameterizations for modelling ocean alkalinization effects on biogeochemistry and plankton dynamics. OceanNets, 2024. http://dx.doi.org/10.3289/oceannets_d5.8.
Full textAbstract:
In this report the potential effects of pulsed ocean alkalinity enhancement (OAE) on plankton growth dynamics, efficacy and carbon dioxide removal (CDR) are simulated at an oligotrophic site nearby the Canary Islands (Spain). Parameterizations of how phytoplankton and bacterial growth respond to variations in carbonate chemistry are introduced and applied. The model resolves vertical profiles within a 420 km2 area of OAE, and within a 2.05×105 km2 surrounding region. Both areas are connected and lateral dispersion causes a horizontal exchange of chemical and biological tracers. The analysis comprises 32 pulsed OAE scenarios of varying intensities and frequencies of alkalinity addition. The intensities of OAE are derived as fractions of total CaO available for OAE in Europe, from 0.05 % (low), 0.1 % (moderate), 0.2 % (high) and 0.4 % (extreme). These four intensities are co-varied with four frequencies of OAE: monthly, seasonal, annual-winter, and annual-summer deployments. The study shows how much the frequency of the OAE influences the efficacies determined locally and remotely. The model results also provide some first insight of potential OAE effects on biological production. (OceanNets Deliverable, D5.8)
4
Muri, Helene, and Anusha Sathyanadh. Report on carbon cycle interactions and efficacy of land-based CDRs (e.g. BECCS), when combined with oceanic CDRs (individually or in a portfolio). OceanNets, 2024. http://dx.doi.org/10.3289/oceannets_d4.8.
Full textAbstract:
In this deliverable 4.8, we analyze the Norwegian Earth System Model (NorESM) simulations from Deliverable 4.6 and 4.7 on land-based and ocean-based Carbon Dioxide Removal (CDR) scenarios. We focus the analysis on BioEnergy coupled to CCS (BECCS) using sugarcane as feedstock, and ocean alkalinity enhancement (OAE), applied individually and in combinations. We find that a higher amount of carbon captured by making use of the carbon sequestration potential of land and ocean together, as expected. The sugarcane yield is unaffected by the OAE deployment, however, carbon uptake by other parts of the land is somewhat reduced by OAE in the combined BECCS and OAE case. Less carbon is taken up by the oceans during BECCS deployment, whilst less carbon is taken up by land during the OAE deployment. The uptake of carbon by the oceans in the combined BECCS and OAE case is directly additive from the individual cases. However, some non-linear responses are seen in other parts of the climate responses. (OceanNets Deliverable, D4.8)
5
Housley, R. Use of the RSAES-OAEP Key Transport Algorithm in Cryptographic Message Syntax (CMS). RFC Editor, 2003. http://dx.doi.org/10.17487/rfc3560.
Full text
6
Taucher, Jan, and Markus Schartau. Report on parameterizing seasonal response patterns in primary- and net community production to ocean alkalinization. OceanNETs, 2021. http://dx.doi.org/10.3289/oceannets_d5.2.
Full textAbstract:
We applied a 1-D plankton ecosystem-biogeochemical model to assess the impacts of ocean alkalinity enhancement (OAE) on seasonal changes in biogeochemistry and plankton dynamics. Depending on deployment scenarios, OAE should theoretically have variable effects on pH and seawater pCO2, which might in turn affect (a) plankton growth conditions and (b) the efficiency of carbon dioxide removal (CDR) via OAE. Thus, a major focus of our work is how different magnitudes and temporal frequencies of OAE might affect seasonal response patterns of net primary productivity (NPP), ecosystem functioning and biogeochemical cycling. With our study we aimed at identifying a parameterization of how magnitude and frequency of OAE affect net growth rates, so that these effects could be employed for Earth System Modell applications. So far we learned that a meaningful response parameterization has to resolve positive and negative anomalies that covary with temporal shifts. As to the intricacy of the response patterns, the derivation of such parameterization is work in progress. However, our study readily provides valuable insights to how OAE can alter plankton dynamics and biogeochemistry. Our modelling study first focuses at a local site where time series data are available (European Station for Time series in the Ocean Canary Islands ESTOC), including measurements of pH, concentrations of total alkalinity, dissolved inorganic carbon (DIC), chlorophyll-a and dissolved inorganic nitrogen (DIN). These observational data were made available by Andres Cianca (personal communication, PLOCAN, Spain), Melchor Gonzalez and Magdalena Santana Casiano (personal communication, Universidad de Las Palmas de Gran Canaria). The choice of this location was underpinned by the fact that the first OAE mesocosm experiment was conducted on the Canary Island Gran Canaria, which will facilitate synthesizing our modelling approach with experimental findings. For our simulations at the ESTOC site in the Subtropical North Atlantic we found distinct, non-linear responses of NPP to different temporal modes of alkalinity deployment. In particular, phytoplankton bloom patterns displayed pronounced temporal phase shifts and changes in their amplitude. Notably, our simulations suggest that OAE can have a slightly stimulating effect on NPP, which is however variable, depending on the magnitude of OAE and the temporal mode of alkalinity addition. Furthermore, we find that increasing alkalinity perturbations can lead to a shift in phytoplankton community composition (towards coccolithophores), which even persists after OAE has stopped. In terms of CDR, we found that a decrease in efficiency with increasing magnitude of alkalinity addition, as well as substantial differences related to the timing of addition. Altogether, our results suggest that annual OAE during the right season (i.e. physical and biological conditions), could be a reasonable compromise in terms of logistical feasibility, efficiency of CDR and side-effects on marine biota. With respect to transferability to global models, the complex, non-linear responses of biological processes to OAE identified in our simulations do not allow for simple parameterizations that can easily adapted. Dedicated future work is required to transfer the observed responses at small spatiotemporal scales to the coarser resolution of global models.
7
Taucher, Jan, and Markus Schartau. Report on parameterizing seasonal response patterns in primary- and net community production to ocean alkalinization. OceanNETs, 2021. http://dx.doi.org/10.3289/oceannets_d5.3.
Full textAbstract:
We applied a 1-D plankton ecosystem-biogeochemical model to assess the impacts of ocean alkalinity enhancement (OAE) on seasonal changes in biogeochemistry and plankton dynamics. Depending on deployment scenarios, OAE should theoretically have variable effects on pH and seawater pCO2, which might in turn affect (a) plankton growth conditions and (b) the efficiency of carbon dioxide removal (CDR) via OAE. Thus, a major focus of our work is how different magnitudes and temporal frequencies of OAE might affect seasonal response patterns of net primary productivity (NPP), ecosystem functioning and biogeochemical cycling. With our study we aimed at identifying a parameterization of how magnitude and frequency of OAE affect net growth rates, so that these effects could be employed for Earth System Modell applications. So far we learned that a meaningful response parameterization has to resolve positive and negative anomalies that covary with temporal shifts. As to the intricacy of the response patterns, the derivation of such parameterization is work in progress. However, our study readily provides valuable insights to how OAE can alter plankton dynamics and biogeochemistry. Our modelling study first focuses at a local site where time series data are available (European Station for Time series in the Ocean Canary Islands ESTOC), including measurements of pH, concentrations of total alkalinity, dissolved inorganic carbon (DIC), chlorophyll-a and dissolved inorganic nitrogen (DIN). These observational data were made available by Andres Cianca (personal communication, PLOCAN, Spain), Melchor Gonzalez and Magdalena Santana Casiano (personal communication, Universidad de Las Palmas de Gran Canaria). The choice of this location was underpinned by the fact that the first OAE mesocosm experiment was conducted on the Canary Island Gran Canaria, which will facilitate synthesizing our modelling approach with experimental findings. For our simulations at the ESTOC site in the Subtropical North Atlantic we found distinct, non-linear responses of NPP to different temporal modes of alkalinity deployment. In particular, phytoplankton bloom patterns displayed pronounced temporal phase shifts and changes in their amplitude. Notably, our simulations suggest that OAE can have a slightly stimulating effect on NPP, which is however variable, depending on the magnitude of OAE and the temporal mode of alkalinity addition. Furthermore, we find that increasing alkalinity perturbations can lead to a shift in phytoplankton community composition (towards coccolithophores), which even persists after OAE has stopped. In terms of CDR, we found that a decrease in efficiency with increasing magnitude of alkalinity addition, as well as substantial differences related to the timing of addition. Altogether, our results suggest that annual OAE during the right season (i.e. physical and biological conditions), could be a reasonable compromise in terms of logistical feasibility, efficiency of CDR and side-effects on marine biota. With respect to transferability to global models, the complex, non-linear responses of biological processes to OAE identified in our simulations do not allow for simple parameterizations that can easily adapted. Dedicated future work is required to transfer the observed responses at small spatiotemporal scales to the coarser resolution of global models.
8
Campbell, James, Spyros Foteinis, Mohammad Madankan, and Phil Renforth. Report on the detailed life cycle analysis results of the two case studies: ocean alkalinity enhancement potential of Spain. OceanNets, 2023. http://dx.doi.org/10.3289/oceannets_d6.4.
Full textAbstract:
A common challenge in many ocean-based negative emissions technologies (NETs) is the difficulty of developing new global industries and supply chains, which could be necessary for their much needed rapid and large-scale deployment. Therefore, to facilitate roll-out, existing industries and infrastructure should preferably be utilised. For ocean alkalinity enhancement (OAE) by CaO, i.e., ocean liming (OL), the lime can be produced by calcination of limestone using the spare capacity in the cement industry. For OAE by NaOH, i.e., electrochemical brine splitting (EBS), the NaOH can be produced by electrolysis of waste brines from the desalination sector. In this case study, we investigate the realistic OAE potential of Spain, because of its large availability of limestone, its increasing spare cement kiln capacity, and its large and growing desalination industry. This case study shows Spain has a high potential for alkalinity addition to the oceans. Specifically, the total CDR capacity of Spain via OAE is 24.4 Mt yr.-1 with contributions of 22.6 Mt of CO2 removed by OL and 1.8 Mt of CO2 removed by EBS, assuming these processes are driven solely by renewable energy. Further, this case study provides a realistic estimate of the CO2 removal potential and life cycle emissions for alkalinity enhancement for a given region, in contrast to more general global or continental studies before it. By doing so, Spain’s annual carbon dioxide removal (CDR) capacity by OAE is also identified. Future work will look to include coastal enhanced weathering of olivine to the portfolio of Spain’s OAE approaches.
9
Kittu, Leila R., and Ulf Riebesell. Report on data of ocean alkalinization mesocosm experiment in a temperate zone neritic system. OceanNets, 2025. https://doi.org/10.3289/oceannets_d5.7.
Full textAbstract:
We hypothesize that responses of natural food webs will depend on the method of OAE applied (CO2-equilibrated vs. non-equilibrated), and on the environmental setting (nutrient conditions, community composition, etc.). During a 54-day mesocosm experiment in May – July 2022, we tested the potential biogeochemical impacts of Ocean Alkalinity Enhancement (OAE) on a temperate, mesotrophic pelagic community in the Raunefjord south of Bergen, Norway. Ten in situ pelagic mesocosms each with a volume of ~55 m3 were deployed in the fjord, enclosing a natural post-bloom plankton community. A CO2 non-equilibrated alkalinity manipulation was achieved by adding sodium hydroxide (NaOH) to create a delta alkalinity gradient of 0, 150, 300, 450 and 600 μmol L-1 in two sets of five mesocosms each. Following the notion that diatoms may be enhanced under silicate-based OAE while coccolithophores would benefit under calcium-based OAE, the experiment was designed to test this hypothesis. To simulate the application of olivine/silicate-based (Mg2SiO4) versus calcium-based (CaCO3) minerals for ocean alkalinity enhancement, corresponding amounts of MgCl2 and CaCl2 were added to the respective mesocosms of each set. This report gives a summary of the datasets so far analyzed.
10
Keller, David P., Neha Mehendale, and Tronje P. Kemena. Analysis (report) of high- resolution modelling of efficacy, and regional impacts of selected ocean NETs close to the deployment sites. OceanNets, 2023. http://dx.doi.org/10.3289/oceannets_d4.3_v1.
Full textAbstract:
Many recent ocean modelling studies have demonstrated the added value of enhanced horizontal resolution, although it comes at a high computational cost. However, few modeling studies of ocean-based CDR have been done at high resolution. Here we assess the effects of model resolution on two simulated ocean-based CDR methods, unequilibrated ocean alkalinity enhancement (OAE) and the direct marine capture (DMC) of CO2 from seawater (with assumed permanent storage), in experiments with the FOCI Earth system model. To do this we utilized two FOCI configurations, one with a 1/2° ocean resolution and the other with a 1/10° ocean nest in the N. Atlantic. Both configurations were run in a series of “paired” experiments with identical climate forcing and CDR deployments. We show that model resolution does appear to matter when simulating OAE and DMC. For OAE, parameterization of physical processes in the coarse resolution version of the model appears to overestimate how long alkalized waters stay in contact with the atmosphere and where they are transported. This results in large differences in OAE efficacy with almost twice as much carbon sequestered when the model resolution is coarse. For the DMC simulations, at one site there were clear differences in the compensating CO2 flux induced by DIC removal, which was again higher with a coarse resolution, while at the other site variability was high and differences were difficult to determine. At both DMC sites there were clear differences in circulation with the two model resolutions, and thus on downstream biogeochemistry. We suggest that well resolving ocean physics may be necessary to best calculate unequilibrated OAE and DMC efficacies and side effects. These results should be confirmed using other models and with different resolutions.