Secure Remote Storage of Logs with Search Capabilities

Dissertação de Mestrado em Engenharia InformáticaAlong side with the use of cloud-based services, infrastructure and storage, the use of application logs in business critical applications is a standard practice nowadays. Such application logs must be stored in an accessible manner in order to used whenever needed. The debugging of these applications is a common situation where such access is required. Frequently, part of the information contained in logs records is sensitive. This work proposes a new approach of storing critical logs in a cloud-based storage recurring to searchable encryption, inverted indexing and hash chaining techniques to achieve, in a unified way, the needed privacy, integrity and authenticity while maintaining server side searching capabilities by the logs owner. The designed search algorithm enables conjunctive keywords queries plus a fine-grained search supported by field searching and nested queries, which are essential in the referred use case. To the best of our knowledge, the proposed solution is also the first to introduce a query language that enables complex conjunctive keywords and a fine-grained search backed by field searching and sub queries.A gerac¸ ˜ao de logs em aplicac¸ ˜oes e a sua posterior consulta s˜ao fulcrais para o funcionamento de qualquer neg´ocio ou empresa. Estes logs podem ser usados para eventuais ac¸ ˜oes de auditoria, uma vez que estabelecem uma baseline das operac¸ ˜oes realizadas. Servem igualmente o prop´ osito de identificar erros, facilitar ac¸ ˜oes de debugging e diagnosticar bottlennecks de performance. Tipicamente, a maioria da informac¸ ˜ao contida nesses logs ´e considerada sens´ıvel. Quando estes logs s˜ao armazenados in-house, as considerac¸ ˜oes relacionadas com anonimizac¸ ˜ao, confidencialidade e integridade s˜ao geralmente descartadas. Contudo, com o advento das plataformas cloud e a transic¸ ˜ao quer das aplicac¸ ˜oes quer dos seus logs para estes ecossistemas, processos de logging remotos, seguros e confidenciais surgem como um novo desafio. Adicionalmente, regulac¸ ˜ao como a RGPD, imp˜oe que as instituic¸ ˜oes e empresas garantam o armazenamento seguro dos dados. A forma mais comum de garantir a confidencialidade consiste na utilizac¸ ˜ao de t ´ecnicas criptogr ´aficas para cifrar a totalidade dos dados anteriormente `a sua transfer ˆencia para o servidor remoto. Caso sejam necess´ arias capacidades de pesquisa, a abordagem mais simples ´e a transfer ˆencia de todos os dados cifrados para o lado do cliente, que proceder´a `a sua decifra e pesquisa sobre os dados decifrados. Embora esta abordagem garanta a confidencialidade e privacidade dos dados, rapidamente se torna impratic ´avel com o crescimento normal dos registos de log. Adicionalmente, esta abordagem n˜ao faz uso do potencial total que a cloud tem para oferecer. Com base nesta tem´ atica, esta tese prop˜oe o desenvolvimento de uma soluc¸ ˜ao de armazenamento de logs operacionais de forma confidencial, integra e autˆ entica, fazendo uso das capacidades de armazenamento e computac¸ ˜ao das plataformas cloud. Adicionalmente, a possibilidade de pesquisa sobre os dados ´e mantida. Essa pesquisa ´e realizada server-side diretamente sobre os dados cifrados e sem acesso em momento algum a dados n˜ao cifrados por parte do servidor..

MAMMALS IN PORTUGAL : A data set of terrestrial, volant, and marine mammal occurrences in P ortugal

Mammals are threatened worldwide, with 26% of all species being includedin the IUCN threatened categories. This overall pattern is primarily associatedwith habitat loss or degradation, and human persecution for terrestrial mam-mals, and pollution, open net fishing, climate change, and prey depletion formarine mammals. Mammals play a key role in maintaining ecosystems func-tionality and resilience, and therefore information on their distribution is cru-cial to delineate and support conservation actions. MAMMALS INPORTUGAL is a publicly available data set compiling unpublishedgeoreferenced occurrence records of 92 terrestrial, volant, and marine mam-mals in mainland Portugal and archipelagos of the Azores and Madeira thatincludes 105,026 data entries between 1873 and 2021 (72% of the data occur-ring in 2000 and 2021). The methods used to collect the data were: live obser-vations/captures (43%), sign surveys (35%), camera trapping (16%),bioacoustics surveys (4%) and radiotracking, and inquiries that represent lessthan 1% of the records. The data set includes 13 types of records: (1) burrowsjsoil moundsjtunnel, (2) capture, (3) colony, (4) dead animaljhairjskullsjjaws, (5) genetic confirmation, (6) inquiries, (7) observation of live animal (8),observation in shelters, (9) photo trappingjvideo, (10) predators dietjpelletsjpine cones/nuts, (11) scatjtrackjditch, (12) telemetry and (13) vocalizationjecholocation. The spatial uncertainty of most records ranges between 0 and100 m (76%). Rodentia (n=31,573) has the highest number of records followedby Chiroptera (n=18,857), Carnivora (n=18,594), Lagomorpha (n=17,496),Cetartiodactyla (n=11,568) and Eulipotyphla (n=7008). The data setincludes records of species classified by the IUCN as threatened(e.g.,Oryctolagus cuniculus[n=12,159],Monachus monachus[n=1,512],andLynx pardinus[n=197]). We believe that this data set may stimulate thepublication of other European countries data sets that would certainly contrib-ute to ecology and conservation-related research, and therefore assisting onthe development of more accurate and tailored conservation managementstrategies for each species. There are no copyright restrictions; please cite thisdata paper when the data are used in publications.info:eu-repo/semantics/publishedVersio

Mammals in Portugal: a data set of terrestrial, volant, and marine mammal occurrences in Portugal

Mammals are threatened worldwide, with ~26% of all species being included in the IUCN threatened categories. This overall pattern is primarily associated with habitat loss or degradation, and human persecution for terrestrial mammals, and pollution, open net fishing, climate change, and prey depletion for marine mammals. Mammals play a key role in maintaining ecosystems functionality and resilience, and therefore information on their distribution is crucial to delineate and support conservation actions. MAMMALS IN PORTUGAL is a publicly available data set compiling unpublished georeferenced occurrence records of 92 terrestrial, volant, and marine mammals in mainland Portugal and archipelagos of the Azores and Madeira that includes 105,026 data entries between 1873 and 2021 (72% of the data occurring in 2000 and 2021). The methods used to collect the data were: live observations/captures (43%), sign surveys (35%), camera trapping (16%), bioacoustics surveys (4%) and radiotracking, and inquiries that represent less than 1% of the records. The data set includes 13 types of records: (1) burrows | soil mounds | tunnel, (2) capture, (3) colony, (4) dead animal | hair | skulls | jaws, (5) genetic confirmation, (6) inquiries, (7) observation of live animal (8), observation in shelters, (9) photo trapping | video, (10) predators diet | pellets | pine cones/nuts, (11) scat | track | ditch, (12) telemetry and (13) vocalization | echolocation. The spatial uncertainty of most records ranges between 0 and 100 m (76%). Rodentia (n =31,573) has the highest number of records followed by Chiroptera (n = 18,857), Carnivora (n = 18,594), Lagomorpha (n = 17,496), Cetartiodactyla (n = 11,568) and Eulipotyphla (n = 7008). The data set includes records of species classified by the IUCN as threatened (e.g., Oryctolagus cuniculus [n = 12,159], Monachus monachus [n = 1,512], and Lynx pardinus [n = 197]). We believe that this data set may stimulate the publication of other European countries data sets that would certainly contribute to ecology and conservation-related research, and therefore assisting on the development of more accurate and tailored conservation management strategies for each species. There are no copyright restrictions; please cite this data paper when the data are used in publications

COVID-19 symptoms at hospital admission vary with age and sex: results from the ISARIC prospective multinational observational study

Background: The ISARIC prospective multinational observational study is the largest cohort of hospitalized patients with COVID-19. We present relationships of age, sex, and nationality to presenting symptoms. Methods: International, prospective observational study of 60 109 hospitalized symptomatic patients with laboratory-confirmed COVID-19 recruited from 43 countries between 30 January and 3 August 2020. Logistic regression was performed to evaluate relationships of age and sex to published COVID-19 case definitions and the most commonly reported symptoms. Results: ‘Typical’ symptoms of fever (69%), cough (68%) and shortness of breath (66%) were the most commonly reported. 92% of patients experienced at least one of these. Prevalence of typical symptoms was greatest in 30- to 60-year-olds (respectively 80, 79, 69%; at least one 95%). They were reported less frequently in children (≤ 18 years: 69, 48, 23; 85%), older adults (≥ 70 years: 61, 62, 65; 90%), and women (66, 66, 64; 90%; vs. men 71, 70, 67; 93%, each P < 0.001). The most common atypical presentations under 60 years of age were nausea and vomiting and abdominal pain, and over 60 years was confusion. Regression models showed significant differences in symptoms with sex, age and country. Interpretation: This international collaboration has allowed us to report reliable symptom data from the largest cohort of patients admitted to hospital with COVID-19. Adults over 60 and children admitted to hospital with COVID-19 are less likely to present with typical symptoms. Nausea and vomiting are common atypical presentations under 30 years. Confusion is a frequent atypical presentation of COVID-19 in adults over 60 years. Women are less likely to experience typical symptoms than men

Recursos humanos: um modelo compreensivo do campo

info:eu-repo/semantics/publishedVersio

9) Efeito do Manejo do Solo em Algumas Propriedades Físicas de um Latossolo Amarelo, do Estado do Pará.

Ministério da Educação e do Desporto e Faculdade de Ciências Agrárias do Pará.1) Discute-se aplicações do método estatístico de Análise de Fatores (AF), na caracterização da estrutura das florestas tropicais, através da elaboração de um mapa tipológico, construído a partir de um índice, definido como: o módulo da resultante da soma vetorial dos escores fatoriais ponderados pela contribuição de cada fator à comunalidade total.2) Este trabalho teve por objetivo avaliar as mudanças edáficas causadas pelo cultivo intensivo (pomar) de um Latossolo Amarelo álico textura média, em comparação com um solo com as mesmas características sob cobertura de uma vegetação secundária (capoeira). As características físicas estudadas foram: textura, densidade global, densidade de partículas, macro e microporosidade e volume de sólidos. Fez-se ainda a determinação da matéria orgânica. Os resultados mostraram que a porosidade total e a macroporosidade alteraram para menor, enquanto que a densidade global aumentou na profundidade do 0-20 cm na área sob pomar. Por sua vez, o manejo intensivo, causado pela mecanização e influenciada pelo baixo teor de matéria orgânica, contribuiu para um brusco aumento de densidade global até a profundidade de 20 cm: em conseqüência, a microporosidade apresenta aumento altamente significativo em relação aos valores encontrados na capoeira, até profundidade de 20 cm.3) A área da bacia do rio Candiru-Açu encontra-se localizada na microrregião homogênea Guajarina, entre os paralelos de 2° 24' a 2° 56' de latitude Sid e entre os meridianos de 47° 19' e 47° 45' de longitude W Gr. Os solos ai existentes são representados pelos Latossolos Amarelos de textura média a muito argilosa. Podzólicos Vermelhos-Amarelos. Solos Aluviais e Hidromórficos Indiscriminados. O objetivo da pesquisa foi demonstrar a eficiência de imagens de satélite do TM/LANDSAT-S no mapeamento do uso atual das terras e da cobertura vegetal da bacia hidrográfica do rio Candiru-Açu, o qual foi realizado na escala 1:100.000. As delimitações foram realizadas por meio da interpretação visual das imagens coloridas do TM/LANDSAT-5 na combinação 3R4G5B, com apoio das imagens preto e branco dos canais 4 e 5, na escala 1:100.000. Na área da bacia foi observado que 54,31% encontra-se coberta por vegetação florestal primitiva, vindo em seguida a atividade pecuária com 30,14%, a capoeira com 12.07%, a agricultura com 3,44% e, finalmente a área urbana com 0,04% da área total. A escala final do mapa de uso atual foi de 1:400.000.4) Relata-se um caso de Hemopericárdio em cão de raça pastor alemão, com 'rês anos de idade, acometido por Hiperparasitismo por Spirocerca lupi. O hemopericárdio resultou da ruptura de um aneurisma do tipo dissecante na porção intrapericárdica da artéria aorta, com o acúmulo aproximado de 300ml de sangue no saco pericárdico, fator determinante de morte súbita por tamponamento cardíaco. Outras lesões foram identificadas a nível da artéria aorta na forma de numerosos e pequenos nódulos na adventícia. Na porção torácica do esôfago, foram identificados três nódulos. Os exemplares de S. lupi totalizaram 175 espécimes, sendo que algumas estavam livres da serosa periesofágica e periaórtica.5) Estudou-se a influência de cinco diferentes sistemas de manejo, na condutividade hidráulica e estabilidade de agregado de um Podzólico Amarelo Tb Álico Epidistrófico, textura arenosa/média no município de Igarapé-Açu, Estado do Pará, cultivado com milho (Zea mays L). A localidade é caracterizada por um clima do tipo Ami da classificação de Köeppen. Além do sistema convencional, foram testados dois sistemas reduzidos de preparo (enxada rotativa e duas gradagens leves) e dois sistemas sem mobilização do solo (capina manual e plantio direto). O sistema convencional apresentou baixo valor de condutividade hidráulica (4,2 mm/h) e a estabilidade de agregado foi maior no plantio direto e nos sistemas reduzidos de preparo na camada superficial de 0-10cm.6) Fui estudada a mineralogia da fração argila dos solos classificados como série Sede e Babaçu, pertencentes ao grande grupo Podzólico Vermelho-Amarelo, existente na Estação Experimental da CEPLAC, município de Santa Inês-MA. O estudo teve por finalidade conhecer a natureza dos minerais de argila desses solos, relacionando-se com suas características físicas e químicas. Identificaram-se como minerais de argila, quartzo, caulinita, ilita e presença de uma mistura pouco definida de ilita/montmorilonita. Embora apresentem mineralogia semelhante ao longo dos subhorizontes, a série Babaçu detém maior teor de argila e, em média, o dobro da CTC da série Sede.7) Em uma propriedade do município de Castanhal, Estado do Pará, em um rebanho de trezentos bovinos destinados à produção leiteira, criados em sistema de semiconfinamento, foi constatado que um animal da raça holandesa,com aproximadamente sete anos de idade e do sexo feminino, apresentava nódulos e lesões multiulcerativas bastante extensas, situadas na região lombo-sacra e dorsal. Pelas características macroscópicas suspeitou-se de carcinoma epidermóide. Em seguida foi realizada biópsia da lesão. O exame histológico comprovou o diagnóstico clínico.8) Os efeitos de micorriza e de níveis de fósforo sobre o crescimento de mudas de Hevea brasiliensis foram determinados em casa-de-vegetação na Escola Superior de Agricultura "Luiz de Queiroz". O delineamento experimental foi completamente casualizado com seis repetições na combinação de três níveis de fósforo, com e sem inoculação. Os níveis de fósforo foram 0,9; 1,8 e 2,7g de P2O5 por planta, usando-se o superfosfato triplo. Nos tratamentos com inoculação, esta fo ifeita com o fungo Gigaspora margarila, sendo que o solo não foi esterilizado. As avaliações foram realizadas nove meses após o plantio. As análises de raízes não evidenciaram a presença do fungo inoculado, entretanto, estas foram infectadas por Rhizoctonia sp. Esta infecção promoveu o aumento do diâmetro, da altura e do peso de matéria seca das plantas fertilizadas com o maior nível de fósforo.9) Com objetivo de avaliar os efeitos do manejo sobre a estabilidade dos agregados do solo em água, foram amostradas, em janeiro de 1992, duas áreas adjacentes de um Latossolo Amarelo álico, textura média, uma cultivada com pomar doméstico de espécies frutíferas que é submetida a contínuo manejo mecanizado e outra não cultivada sob vegetação secundária em regeneração (capoeira), com aproximadamente 18 anos de pousio. Foram feitas amostragens às profundidades de 0-10 cm, 10-20 cm, 20-30 cm e 30-40 cm. Os dados obtidos não demonstraram efeito significativo do manejo sobre a agregação e o conteúdo de matéria orgânica. Estas variáveis somente foram influenciadas pela profundidade do solo. O efeito significante do manejo em função da profundidade, manifestou-se sobre a densidade aparente, a macroporosidade e a microporosidade. O índice de agregação apresentou correlação altamente significante com a densidade aparente, a macroporosidade e o conteúdo de matéria orgânica. Com a microporosidade, a signficância ficou ao nivel de 0,05%.1) This work discusses aplications offactor analysis to characterize the structure of tropical forests. It suggested that the construction of the typological map can be based on an index defined as the modulus of the resultant vectorial sum of factor scores weighted by the contribution of each factor for total community.2) This work had as objective to evaluate the edaphyc change caused hy intensive cultivation of an alic yellow latosol of medium texture, for making comparison with the same soil but with another regrow plant cover (capoeira). The soil physical characteristics studied were: texture, bulk density, particle density, macro and microporosity and volume of particles. The organic matter content was also determined. The results pointed out that the total porosity and macroporosity changed to less in the area under intensive cultivation in relation with capoeira area. The bulk density in this area increased at the depth of to 20cm. The intensive management caused by the soil mechanization an influenced by the low value organic matter as content. Contributed to increase the bulk density to a soil depth of 20cm. For this reason the microporosity presents hight significant increase in relation to the values presents in the soil of capoeira treatment up to the soil depth of 20cm.3) The Candiru-Açu area is located within the homogeneous micro region Guajarina between latitude 02° 24 ; and 02º 56' South, and longitude 47 º 19" and 47°45' west. The soil there existing are represented by the Yellow Latosols medium textured to very clayey; red-yellow Podzolics and Alluvial and Hidromorphicsoil. The objective of this study was to demonstrate the LANDSAT-5 image efficience in the survey of the atual use of lands and vegetal cover of Candiru-Açu hydrographical basin, which was mapped on the 1:100.000 scale. The delineated through visual interpretation of the colored TM/LANDSAT-5 images composed by the 3R 4G 5B channels aided by black and white images on the 4 and 5 channels a 1:100.000 scale. The final scale o fthe mup of atual use was 1:400.000.4) This study reports a case of Hemopericardium in a three years old German shepherd dog, taken with hyperparasitism by Spirocerca lupi. The hemopericardium was caused by the rupture of an aneurism of the dissecant type on the intrapericardial portion of the aorta, with a blood acummulation of about 300 ml in the pericardium sac, a determinam factor of sudden death. Other Lesions were identified on the aorta artery in the form of numerous small nolules on the adventitia. Three nodules were found on the thoracic portion of the esophagus. There were 175 S. lupi specimes, some of which found free in the perisophagic and periaorta serosa.5) The main ptirpose study Mas to evaluate the influence of five differents management systems, on the hydraulic conductivity (determinated in laboratory) and aggregated stability, of the sandy/medium textured Epidistrofic Alie Yellow Podzolic soil, located in the Amazon Region, county of Igarapé-Açu, State of Pará in Brazil, tilled with corn (Zea mays L.) This area is characterized by a type Ami climate based on the Koeppen classification. In addition to the conventional system of preparing the soil, two reduced system were tested (rotovator-RO and two light harrowings - LH) and two systems without tillaging the soil (hand weeding - HW and no-tilled - NT). The conventional system caused a great reduction on the hydraulic conductivity, where the aggregated stability was small in the reduced systems and no-tilled,in the 0-10 cm surface layer.6) The mineralogy of clays fraction of soil Sede serie and soil Babaçu serie was studied. The two soil series belongs to the red-yellow podzolic soil great groups of the Experimental Station of CEPLAC, in Santa Inês county of Maranhão State. The aims of the present study was to know the nature of the clay mineralogy of the soil and to stablish the relationship with some phisical and chemical soil characteristics. The main clay minerais identified were: quartz, caolinite, illit/montmorilonit. Dispite the both soil series present similar mineralogy along the soil horizons the Babaçu soil serie presents more clay percent along the soil horinzons in average double of CEC of they soil serie Sede.7) A 7 year old cow of the Deutsch race, belonging to a herd of 300 milk cows raised in semiconfinament in a ranch located in Castanhal, State of Pará, Brazil, was found with nodules and multicerative extensive lesions on the lunbosacral and dorsal regions. The microscopic characteristics indicated the possibility of squamous cell carcinoma, a diagnosis confirmed by the biopsy ofthe lesion.8) The effect of mycorrhiza and phosphorus leveis on the growth of Hevea brasiliensis seedlings was determined in a greenhouse trial at the Escola Superior de Agricultura "Luiz de Queiroz ". The experimental design wass completely randomized with six replications in a factorial combination of three P levels and two inoculation treatments. The phosphorus levels were: 0,9; 1,8 and 2,7 of P2O5 per plant using triple superphosphate. The inoculation treatments were: without inoculation and inocidation with the fungus Gigaspora margarita. For both treatments the soil irai not sterilized. Evaluations were made nine months after planting. Root analysis did not show the presence of the fungus inocidated, however, roots were infected by Rhyzoctonia sp. This infection promoted an increase in height, diameter and shoot dry matter on plants fertilized with the highest phosphorus level.9) The effect of aggregate stability of the soil was studied in the alic yellow latosol with medium granulometric textural conditions. One of the areas is cultivate with a domestic fruit tree archard wich is submitted to continuous mechanized management and the other one is a non-cultivated secondary forest with approximately 18 years of rest. The samples were taken at the iepths of 0-10 cm, 10-20 cm., 20-30 cm and 30-40 cm. The results didn 't show any significant effect of the management on the aggregation and on the organic matter content. These variable were affected only by the soil depth. The significant effect of management related to depht was shown on bulk density on macroporosity and on microporosity. The aggregation index showed higt significant correlation with bulkdensity, macroporosity and organic matter content the signification with microporosity was at 0,05%

Santos e devotos no império ultramarino português

O artigo faz uma história da coleção de vilancicos de São Gonçalo de Amarante, que integram a Coleção Barbosa Machado na Biblioteca Nacional do Rio de Janeiro e, simultaneamente, apresenta reflexões sobre a relação santo-devoto no Império Ultramarino Português no século XVIII. Os vilancicos são identificados como um gênero retórico poético que evoca o santo e uma prática religiosa que contrastava com outras. Parte-se de uma perspectiva comparativa entre os vilancicos e outras evidências sobre a relação santo-devoto e, em particular, sobre o santo e sua festa na sociedade colonial escravista. O artigo dialoga com a historiografia centrada na noção de Império e com uma bibliografia da História e das Ciências Sociais voltada para a relação santodevoto, a santidade e as festas.<br>The paper produces a story of vilancicos for Saint Gonçalo do Amarante, that are part of the Rio de Janeiro National Library Barbosa Machado Collection and presents reflections on the relation saint-devotees in the Portuguese Overseas Empire during the 18th century. The vilancicos are identified as a rhetoric poetic genre that reminds the saint and a religious practice that contrasted with others. It starts from a comparative perspective between the vilancicos and other evidences about the relation saint-devotee, and in particular, about the saint and his feast in a colonial and proslavery society. The article deals with the historiography centered in the notion of Empire, and with a bibliography of History and Social Sciences pointed to the relation saint-devotee, the holiness and the feasts

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved