4,889 research outputs found
SecDevOps modeling for web services and applications
The concept of Web Applications and software in general is very present in our everyday lives, and from the consumer perspective it might seem simple, as we only see the final product. But, to develop this software, there is a lot going on behind the scenes that we do not see, in fact, building software continuously and with a certain level of quality is a very complex task and takes a lot of effort. In this project I aim to analyse and compare existing application development security models and tools, focusing on how they are applied to DevOps (Software Development and IT Operations). From the comparisons, I will choose the best model according to my opinion and I will apply the model to the implementation of web services and applications. After the implementation of the use case. At the end, I will discuss possible improvements and changes for the approach used to develop the application
Non universality of entanglement convertibility
Recently, it has been suggested that operational properties connected to
quantum computation can be alternative indicators of quantum phase transitions.
In this work we systematically study these operational properties in 1D systems
that present phase transitions of different orders. For this purpose, we
evaluate the local convertibility between bipartite ground states. Our results
suggest that the operational properties, related to non-analyticities of the
entanglement spectrum, are good detectors of explicit symmetries of the model,
but not necessarily of phase transitions. We also show that thermodynamically
equivalent phases, such as Luttinger liquids, may display different
convertibility properties depending on the underlying microscopic model.Comment: 5 pages + references, 4 figures - improved versio
Teacher and peer reports on preschoolers’ sociometric popularity
This study investigated the association between preschool children’s sociometric popu-larity obtained from peer sociometric nominations and from teachers’ classifications. A total of 1535 children (731 girls and 804 boys), aged between 34 and 89.6 months (M = 61.96, SD = 8.91), and 89 teachers participated in the study. The association between reports from the two sources, although not independent, was weak, with teachers perceiving more children as popular and fewer children as rejected. Teacher and peer classifications were similarly asso-ciated with social skills and behavior problems. Sociometric popularity obtained from teachers, but not from peers, was associated with children’s age and verbal competence. Overall, findings suggest that traditional peer sociometric nominations, even at early ages, are not replaceable by teachers’ classifications of children’s sociometric popularity.info:eu-repo/semantics/acceptedVersio
Projeto Balal Gainako – projeto de dinamização dos sistemas de produção pecuários nos sectores de Pitche e Gabú (Guiné-Bissau): implementação do maneio alimentar
Os efetivos bovinos da região de Gabú (Guiné-Bissau), além das
limitações naturais impostas pela produtividade da raça e pelas doenças
endémicas, estão sujeitos a um forte stress alimentar na estação seca.
A experiência internacional mostra que as espécies arbóreas e arbustivas
indígenas, ou alóctones, produtoras de forragem de elevado valor
nutritivo, rica em proteína bruta, integradas em sistemas agrosilvopastoris,
são uma solução técnica eficaz e eficiente para obviar a
escassez de alimentos animais nos períodos secos, nas áreas tropicais
de chuvas sazonais.
A estruturação de sistemas agro-silvopastoris para a área de estudo
envolveu nove etapas metodológicas, entre as quais: (i) seleção e
entrevista no campo de informantes locais; (ii) identificação e seleção,
à escala da espécie, das plantas autóctones de maior interesse
veterinário ou na alimentação animal; (iii) elaboração de uma proposta
modelo de recolha, multiplicação e distribuiçãode germoplasma das
espécies selecionadas (autóctones e alóctones).
Foram identificadas 10 espécies autóctones de interesse potencial, das
quais foram selecionadas para multiplicação: Faidherbia albida (Fabaceae,
Mimosoideae), Afzelia africana (Fabaceae, Caesalpinioideae), Dichrostachys
cinerea (Fabaceae, Mimosoideae), Moringa oleifera (Moringaceae) e Prosopis
africana (Fabaceae, Faboideae). As espécies indígenas são insuficientes
para cumprir os objectivos do projeto. Entre as espécies arbóreas
forrageiras alóctones de uso corrente em sistemas silvo-pastoris em
outros países africanos, elegeram-se para multiplicação e distribuição
duas leguminosas de origem centro-americana: Gliricidia sepium e a
Leucaena leucocephala
Raman excitation spectroscopy of carbon nanotubes: effects of pressure medium and pressure
Raman excitation and emission spectra for the radial breathing mode (RBM) are
reported, together with a preliminary analysis. From the position of the peaks
on the two-dimensional plot of excitation resonance energy against Raman shift,
the chiral indices (m, n) for each peak are identified. Peaks shift from their
positions in air when different pressure media are added - water, hexane,
sulphuric acid - and when the nanotubes are unbundled in water with surfactant
and sonication. The shift is about 2 - 3 cm-1 in RBM frequency, but
unexpectedly large in resonance energy, being spread over up to 100meV for a
given peak. This contrasts with the effect of pressure. The shift of the peaks
of semiconducting nanotubes in water under pressure is orthogonal to the shift
from air to water. This permits the separation of the effects of the pressure
medium and the pressure, and will enable the true pressure coefficients of the
RBM and the other Raman peaks for each (m, n) to be established unambiguously.Comment: 6 pages, 3 Figures, Proceedings of EHPRG 2011 (Paris
Thrombotic events and COVID-19 vaccines
COVID-19 vaccines are considered promising agents in the control of the pandemic. Although their safety was assessed in randomised clinical trials, severe adverse events (AEs) have been reported after large-scale administration. This study aims to evaluate thromboembolic AEs reported after vaccination in a real-world context and how they led to the interruption of vaccination campaigns. We also review the benefits and risks of the vaccines approved in the European Union and provide recommendations. A review of the literature was performed using Medline/PubMed electronic database as well as institutional and pharmacovigilance official reports. Our findings show that vaccine-induced prothrombotic immune thrombocytopenia has been suggested as a very rare AE associated with viral vector vaccines. Unusual thrombotic events combined with moderate-to-severe thrombocytopenia were reported mainly in women under 60 years of age. As safety signals emerged, Vaxzevria and Janssen´s COVID-19 vaccine campaigns have been paused while investigations proceed. On the other hand, the number of deep vein thrombosis and pulmonary embolism reports have not increased. Post-marketing surveillance indicated that mRNA vaccines are safe and should continue to be used. The thrombotic events report rate is not increased in people over 60 years. As they are at greater risk for COVID-19 complications and death, no vaccine restrictions are recommended in this group. Risk factors for vaccine-induced prothrombotic immune thrombocytopenia should be established so that evidence-based decisions can be made. Systematic monitoring of COVID-19 vaccine safety is essential to ensure that the benefits of vaccination outweigh the risks.All authors had full access to the complete data in the study and accepted the responsibility to submit it for publication. AA holds a PhD Grant (Ref. 2020. 09390.BD), co-funded by the Fundação para a Ciência e a Tecnologia, Lisbon, Portugal, and the Fundo Social Europeu Programme
Impact of the COVID-19 pandemic on tuberculosis services
Background: In Portugal, Outpatient Tuberculosis Centres (OTBC) are responsible for the diagnosis, treatment, screening and prevention of tuberculosis (TB), and only severe or resistant cases are hospitalized. Aim: To understand how infection control norms and standards were applied and how these centres responded during the pandemic. Method: We sent an electronic questionnaire to all coordinators of OTBC. The questionnaire included questions on infection control during the COVID-19 pandemic and evaluation of the functioning of the OTBC in two periods: during the 1st National State of Emergency and after 1 year. Results: Thirty-two responses were obtained (52.5%). The infection control norms were globally applied; diagnosis, treatment, and prevention were kept, and contact screening was only affected during the 1st State of Emergency. However, half of the respondents (53.1%) believed that there were diagnostic delays during the 1st State of Emergency, rising to 68.8% after 1 year. Only 31.3% performed Directly Observed Therapy (DOT) in all patients during the 1st State of Emergency, and 59.4% after 1 year. Half the inquiries expected an increase in TB incidence in the near future. Conclusion: The pandemic affected OTBC functioning, although the services were kept open; diagnostic delay and DOT appliance were the most affected. © 2022 Sociedade Portuguesa de PneumologiaFunding text 1: No specific funding was received for this work. However, Ana Aguiar holds a PhD Grant (2020.09390.BD), co-funded by the FCT and the FSE Program. We would like to thank all of the coordinators of TB centres who have answered the questionnaire. This research initiative would not be possible without their participation. We would also like to thank Ana Isabel Ribeiro for drawing the map of Portugal's Region Health Administrations. The work is part of the scientific activities of Global Tuberculosis Network and of the WHO Collaborating Centre for TB and Lung Diseases in Tradate, Italy (ITA-80).; Funding text 2: No specific funding was received for this work. However, Ana Aguiar holds a PhD Grant (2020.09390.BD), co-funded by the FCT and the FSE Program
Moment release rate of Cascadia tremor constrained by GPS
A comparison of GPS and seismic analyses of 23 distinct episodic tremor and slip events, located throughout the Cascadia subduction zone over an 11-year period, yields a highly linear relationship between moment release, as estimated from GPS, and total duration of nonvolcanic tremor, as summed from regional seismic arrays. The events last 1–5 weeks, typically produce ~5 mm of static forearc deformation, and show cumulative totals of tremor that range from 40 to 280 h. Moment released by each event is estimated by inverting GPS-measured deformation, which is sensitive to all rates of tremor-synchronous faulting, including aseismic creep, for total slip along the North American-Juan de Fuca plate interface. Tremor, which is shown to be largely invariant in amplitude and frequency content both between events and with respect to its duration, is quantified using several different parameterizations that agree to within 10%. All known Cascadia events detected since 1997, which collectively span the Cascadia arc from northern California to Vancouver Island, Canada, release moment during tremor at a rate of 5.2 ± 0.4 X 1016 N m per hour of recorded tremor. This relationship enables estimation of moment dissipation, via seismic monitoring of tremor, along the deeper Cascadia subduction zone that poses the greatest threat to its major metropolitan centers
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