Análise do comportamento dinâmico de vigas sanduíche com núcleo honeycomb preenchido com gel magneto reológico

With the rapid advancement of technology comes the need for lighter weight and higher strength materials, so studies on new materials and manufacturing techniques are needed. The aeronautics industry is always at the forefront of researching new materials, where the weight factor is crucial. In contrast, aircraft suffer from intense mechanical vibration and the ability to control these vibrations is of paramount importance for stability. of the aircraft and its structural integrity. To control these intense vibrations, intelligent materials have been pointed as a possible resource for vibration control, since it is possible to vary the modal frequencies of the structure through electrical or magnetic excitations. The objective of this dissertation is to analyze the dynamic behavior under the influence of vibrations in sandwich beams, which have honeycomb cores filled with rheological magnet gels and composite material skins. The development of the work has an experimental analysis through free and forced vibration tests to determine the modal parameters of the beams built according to the applied magnetic field intensity, and a statistical analysis to determine the factors that most impacted this process. With the results obtained, the use of these materials is promising in structures, due to the fact that they achieve reductions in the value of natural frequencies in the order of 54%, increase in damping factors of up to 390% and decrease in forced vibration amplitude of 40%. % in relation to the use of a magnetic field. Resulting from the statistical analysis showed that the factor that most influenced the response of free and forced vibration assays was the gel. In the conclusion of this dissertation, it is proposed new models of beams, since there are few studies in the honeycomb core filled with rheological magnet gel.Com o avanço acelerado da tecnologia surge a necessidade de materiais com menor peso e maior resistência, assim estudos em novos materiais e técnicas de fabricação são necessárias. A indústria aeronáutica sempre está à frente em pesquisa de novos materiais, onde o fator “peso” é crucial, em contrapartida, aeronaves sofrem com problema de intensa vibrações mecânicas e a possibilidade de conseguir fazer o controle dessas vibrações é de suma importância para a estabilidade da aeronave e sua integridade estrutural. Para controle dessas intensas vibrações tem-se apontado os materiais inteligentes como possível recurso para controle de vibrações, pois é possível variar as frequências modais da estrutura através de excitações elétricas ou magnéticas. O objetivo desta dissertação é de realizar a análise do comportamento dinâmico sobre influência de vibrações em vigas sanduíche, que possuem núcleos em forma de colmeia (honeycomb), preenchidos por géis magneto reológicos e faces em material compósito. O desenvolvimento do trabalho possui uma análise experimental através de ensaios de vibrações livre e forçada para a determinação dos parâmetros modais das vigas construídas em função da intensidade de campo magnético aplicado, e uma análise estatística para determinar os fatores que mais impactaram nesse processo. Com os resultados obtidos, o emprego desses materiais se mostra promissores em estruturas, devido ao fato de alcançar reduções no valor das frequências naturais na ordem de 54%, aumento nos fatores de amortecimento de até 390% e diminuição na amplitude de vibração forçada de 40% em relação ao emprego de um campo magnético. Resultante da análise estatística mostrou que o fator que mais influenciou na resposta dos ensaios de vibração livre e forçada foi o gel. Na conclusão desta dissertação, se propõe novos modelos de vigas, já que são escassas na literatura trabalhos com núcleo honeycomb preenchido com gel magneto reológico

Análise sobre acidentes em humanos por ofídicos

The aim was to identify the medical conduct against snakebites in the literature. This is a descriptive study of a critical-reflexive nature, with a qualitative approach. Three categories were established for analysis, such as: Ophidian accidents, Medical conducts and Permanent education. It was noted the importance of recognizing snakes and knowledge of clinical management in the establishment of an appropriate medical conduct and that, for this, it is necessary for the professional to have a continuing education in their work environment. It is concluded that their accidents constitute a public health problem, with the highest number of accidents in rural areas, in patients of economically active age; regarding the anatomical part, the lower limbs were the most affected; Regarding seasonality, the months from October to December were more frequent and most patients sought immediate help, up to 3 hours after the accident. Among the accidents, the most frequent local manifestations were pain and edema. Most cases were classified as mild and the number of deaths extremely low. The results showed a lack in the taxonomic description and the scarcity of scientific materials that addressed the medical conduct to be taken in the face of accidents with snakes.Objetivou-se identificar a conduta médica frente aos acidentes ofídicos na literatura. Trata-se de um estudo descritivo de caráter crítico-reflexivo, de abordagem qualitativa. Estabeleceu-se três categorias para análise, tais quais: Acidentes ofídicos, Condutas médicas e Educação permanente. Notou-se a importância do reconhecimento das serpentes e conhecimento do manejo clínico no estabelecimento de uma conduta médica adequada e que, para isso, torna-se necessário que o profissional tenha uma educação continuada em seu ambiente laboral. Conclui-se que seus acidentes constituem um problema de saúde pública, sendo o maior número de acidentes na zona rural, em pacientes com idade economicamente ativa; com relação a parte anatômica, os membros inferiores foram os mais acometidos; com relação a sazonalidade, os meses de outubro a dezembro tiveram maior frequência e a maioria dos pacientes procuraram socorro imediato, até 3 horas após o acidente. Dentre os acidentes, as manifestações locais mais frequentes foram dor e edema. A maioria dos casos foram classificados como leves e o número de óbito extremamente baixos. Os resultados evidenciaram carência na descrição taxonômica e a escassez de materiais científicos que abordavam sobre as condutas médicas a serem tomadas frente aos acidentes com serpentes das serpentes

Análise sobre acidentes em humanos por ofídicos

The aim was to identify the medical conduct against snakebites in the literature. This is a descriptive study of a critical-reflexive nature, with a qualitative approach. Three categories were established for analysis, such as: Ophidian accidents, Medical conducts and Permanent education. It was noted the importance of recognizing snakes and knowledge of clinical management in the establishment of an appropriate medical conduct and that, for this, it is necessary for the professional to have a continuing education in their work environment. It is concluded that their accidents constitute a public health problem, with the highest number of accidents in rural areas, in patients of economically active age; regarding the anatomical part, the lower limbs were the most affected; Regarding seasonality, the months from October to December were more frequent and most patients sought immediate help, up to 3 hours after the accident. Among the accidents, the most frequent local manifestations were pain and edema. Most cases were classified as mild and the number of deaths extremely low. The results showed a lack in the taxonomic description and the scarcity of scientific materials that addressed the medical conduct to be taken in the face of accidents with snakes.Objetivou-se identificar a conduta médica frente aos acidentes ofídicos na literatura. Trata-se de um estudo descritivo de caráter crítico-reflexivo, de abordagem qualitativa. Estabeleceu-se três categorias para análise, tais quais: Acidentes ofídicos, Condutas médicas e Educação permanente. Notou-se a importância do reconhecimento das serpentes e conhecimento do manejo clínico no estabelecimento de uma conduta médica adequada e que, para isso, torna-se necessário que o profissional tenha uma educação continuada em seu ambiente laboral. Conclui-se que seus acidentes constituem um problema de saúde pública, sendo o maior número de acidentes na zona rural, em pacientes com idade economicamente ativa; com relação a parte anatômica, os membros inferiores foram os mais acometidos; com relação a sazonalidade, os meses de outubro a dezembro tiveram maior frequência e a maioria dos pacientes procuraram socorro imediato, até 3 horas após o acidente. Dentre os acidentes, as manifestações locais mais frequentes foram dor e edema. A maioria dos casos foram classificados como leves e o número de óbito extremamente baixos. Os resultados evidenciaram carência na descrição taxonômica e a escassez de materiais científicos que abordavam sobre as condutas médicas a serem tomadas frente aos acidentes com serpentes das serpentes

Osteonecrose dos maxilares associada ao uso de medicamentos

A osteonecrose pode ser definida como lesão de osso exposto ou fístula em pacientes sem histórico de doença metastática ou de radioterapia, que estão sob tratamento com agentes antirreabsortivos e/ou antiangiogênicos, tendo suas lesões persistindo por mais de oito semanas. Este estudo tem por objetivo descrever a osteonecrose associada ao uso de medicamentos, relatando sua etiologia e suas formas de tratamento. Esta pesquisa é uma revisão narrativa de Literatura, feita por meio de levantamento bibliográfico nas bases de dados Biblioteca Virtual em Saúde (BVS), Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS), Biblioteca Eletrônica Científica Online (SciELO) e no PubMed. A osteonecrose relacionada ao uso de medicamentos é uma patologia desafiadora, tendo áreas de tecido ósseo não vital que favorecem a colonização de bactérias e aumento da necrose óssea. Na literatura não há um protocolo especifico de tratamento, contudo, o uso de terapia fotodinâmica antimicrobiana vem se mostrado uma alternativa promissora no combate a essa patologia

Surgical treatment of onychomatricoma with dermal graft : case report.

Relata-se caso de mulher de 58 anos que apresentou espessamento da unha do h?lux esquerdo acompanhado por crescimento lento de les?o n?dulo-vegetante no leito ungueal. Ap?s bi?psia incisional com exame anatomopatol?gico a les?o foi diagnosticada como onicomatricoma, uma rara neoplasia benigna espec?fica do complexo ungueal. O tratamento de escolha do onicomatricoma ? cir?rgico, sendo realizado no presente caso a reconstru??o do leito ungueal atrav?s de enxerto d?rmico.Case report of a 58-year-old woman that presented with nail thickening of the left hallux in association with a slow- growing nodular/vegetative lesion on the nail matrix. After incisional biopsy and histopathological examination, the lesion was diagnosed as an onychomatricoma, a rare benign neoplasia that occurs specifically in the nail matrix. The treatment of choice for the onychomatricoma is surgery and in the present case, a reconstruction of the ungula matrix was achieved through a dermal graft

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

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

ATLANTIC-PRIMATES: a dataset of communities and occurrences of primates in the Atlantic Forests of South America

Primates play an important role in ecosystem functioning and offer critical insights into human evolution, biology, behavior, and emerging infectious diseases. There are 26 primate species in the Atlantic Forests of South America, 19 of them endemic. We compiled a dataset of 5,472 georeferenced locations of 26 native and 1 introduced primate species, as hybrids in the genera Callithrix and Alouatta. The dataset includes 700 primate communities, 8,121 single species occurrences and 714 estimates of primate population sizes, covering most natural forest types of the tropical and subtropical Atlantic Forest of Brazil, Paraguay and Argentina and some other biomes. On average, primate communities of the Atlantic Forest harbor 2 ± 1 species (range = 1–6). However, about 40% of primate communities contain only one species. Alouatta guariba (N = 2,188 records) and Sapajus nigritus (N = 1,127) were the species with the most records. Callicebus barbarabrownae (N = 35), Leontopithecus caissara (N = 38), and Sapajus libidinosus (N = 41) were the species with the least records. Recorded primate densities varied from 0.004 individuals/km 2 (Alouatta guariba at Fragmento do Bugre, Paraná, Brazil) to 400 individuals/km 2 (Alouatta caraya in Santiago, Rio Grande do Sul, Brazil). Our dataset reflects disparity between the numerous primate census conducted in the Atlantic Forest, in contrast to the scarcity of estimates of population sizes and densities. With these data, researchers can develop different macroecological and regional level studies, focusing on communities, populations, species co-occurrence and distribution patterns. Moreover, the data can also be used to assess the consequences of fragmentation, defaunation, and disease outbreaks on different ecological processes, such as trophic cascades, species invasion or extinction, and community dynamics. There are no copyright restrictions. Please cite this Data Paper when the data are used in publications. We also request that researchers and teachers inform us of how they are using the data. © 2018 by the The Authors. Ecology © 2018 The Ecological Society of Americ