3,035 research outputs found
EmBench: Quantifying Performance Variations of Deep Neural Networks across Modern Commodity Devices
In recent years, advances in deep learning have resulted in unprecedented
leaps in diverse tasks spanning from speech and object recognition to context
awareness and health monitoring. As a result, an increasing number of
AI-enabled applications are being developed targeting ubiquitous and mobile
devices. While deep neural networks (DNNs) are getting bigger and more complex,
they also impose a heavy computational and energy burden on the host devices,
which has led to the integration of various specialized processors in commodity
devices. Given the broad range of competing DNN architectures and the
heterogeneity of the target hardware, there is an emerging need to understand
the compatibility between DNN-platform pairs and the expected performance
benefits on each platform. This work attempts to demystify this landscape by
systematically evaluating a collection of state-of-the-art DNNs on a wide
variety of commodity devices. In this respect, we identify potential
bottlenecks in each architecture and provide important guidelines that can
assist the community in the co-design of more efficient DNNs and accelerators.Comment: Accepted at MobiSys 2019: 3rd International Workshop on Embedded and
Mobile Deep Learning (EMDL), 201
El minicomputador de PAPY una estrategia didáctica para comprender y fortalecer las operaciones básicas
Esta propuesta tiene como fin, presentar una estrategia metodológica como herramienta en el proceso de aprendizaje de las operaciones elementales, por medio de la utilización del minicomputador de papy, con base en las experiencias realizadas en los colegios maristas de Colombia. En este trabajo se evidencia el valor pedagógico del juego y de la incorporación en forma adecuada de las nuevas tecnologÃas de la información para la formación del pensamiento matemático. El minicomputador de papy, es un ejercitador que nos permite desarrollar en los niños conceptos como la composición y descomposición de números utilizando el esquema multiplicativo y aditivo. Además, otra estrategia que permite el minicomputador de Papy es realizar las operaciones suma, resta, multiplicación y división, de las cuales nos encargaremos en esta experiencia de aula
El minicomputador de Papy: una estrategia didáctica para comprender y fortalecer las operaciones básicas
Esta propuesta, del proyecto Juega y Construye la Matemática, tiene como fin presentar una estrategia metodológica como herramienta en el proceso de aprendizaje de las operaciones elementales, por medio de la utilización del minicomputador de Papy, con base en las experiencias realizadas en los colegios Maristas de Colombia. En este trabajo se evidencia el valor pedagógico del juego y de la incorporación en forma adecuada de las nuevas tecnologÃas de la información para la formación del pensamiento matemático. El minicomputador de Papy, es un ejercitador que nos permite desarrollar en los niños conceptos como la composición y descomposición de números utilizando el esquema multiplicativo y aditivo. Además, otra estrategia que permite el minicomputador de Papy es realizar las operaciones suma, resta, multiplicacion y división, de las cuales nos encargaremos en esta experiencia de aula
A family of droids -- Android malware detection via behavioral modeling: static vs dynamic analysis
Following the increasing popularity of mobile ecosystems, cybercriminals have increasingly targeted them, designing and distributing malicious apps that steal information or cause harm to the device's owner. Aiming to counter them, detection techniques based on either static or dynamic analysis that model Android malware, have been proposed. While the pros and cons of these analysis techniques are known, they are usually compared in the context of their limitations e.g., static analysis is not able to capture runtime behaviors, full code coverage is usually not achieved during dynamic analysis, etc. Whereas, in this paper, we analyze the performance of static and dynamic analysis methods in the detection of Android malware and attempt to compare them in terms of their detection performance, using the same modeling approach. To this end, we build on MaMaDroid, a state-of-the-art detection system that relies on static analysis to create a behavioral model from the sequences of abstracted API calls. Then, aiming to apply the same technique in a dynamic analysis setting, we modify CHIMP, a platform recently proposed to crowdsource human inputs for app testing, in order to extract API calls' sequences from the traces produced while executing the app on a CHIMP virtual device. We call this system AuntieDroid and instantiate it by using both automated (Monkey) and user-generated inputs. We find that combining both static and dynamic analysis yields the best performance, with F-measure reaching 0.92. We also show that static analysis is at least as effective as dynamic analysis, depending on how apps are stimulated during execution, and, finally, investigate the reasons for inconsistent misclassifications across methods.Accepted manuscrip
Dicionário de História de Pelotas
No ano de 2005 iniciou-se o projeto intitulado "Dicionário sobre a História de Pelotas". A ideia surgiu tendo em vista toda a produção existente no campo da História, especialmente vinculada a monografias, trabalhos de conclusão de curso, dissertações e teses, que discutiam a cidade e as pessoas que nela habitavam ou que por aqui passavam. A concepção era ousada e tinha como meta aglutinar os
estudos dos principais especialistas sobre temas diversos. Dessa forma, foram 5 anos de trabalho intenso ao se convidar e definir como seriam tratados os verbetes por 36 profissionais e 14 estudantes, hoje formados e atuando. Passados 7 anos do lançamento da 1ª edição do Dicionário da História de Pelotas, já era o momento de publicá-lo em versãodigital, dando maior visibilidade e facilidade de acesso à obra.Sem bols
Patterns of distribution and abundance of larval phosichthyidae (actinopterygii, stomiiformes) in southeastern Brazilian waters
Horizontal and vertical distribution patterns and abundance of larval phosichthyids were investigated from oblique and depth-stratified towns off Southeastern brazilian waters, from São Tomé cape (41ºW.; 22ºS.) to São Sebastião island (45ºW.; 24ºS.). The sampling was performed during two cruises (January/2002 -summer; August/2002 -winter). Overall 538 larvae of Phosichthyidae were collected during summer and 158 in the winter. Three species, Pollichthys mauli, Vinciguerria nimbaria and Ichthyioccoccus sp. occurred in the area, but Ichthyioccoccus sp. was extremely rare represented by only one specimen, caught in the oceanic region during the summer. Geographically, larval were concentrated in the oceanic region, and vertically distributed mainly between the surface and 80 m depth in the summer and winter. Larvae were more abundant during the night, performing a diel vertical migration in the water column. The results suggest that the meandering and eddies of Brazil Current play important role on the transport and distribution patterns of larval phosichthyids over the oceanic and neritic area in the Southeastern Brazil.Padrões de distribuição horizontal e vertical e abundância de larvas de peixes de Phosichthyidae foram examinados a partir de arrastos oblÃquos e estratificados em águas do Sudeste Brasileiro, entre cabo de São Tomé (41ºW.; 22ºS.) e a ilha de São Sebastião (45ºW.; 24ºS.). A amostragem foi realizada durante dois cruzeiros (Janeiro/2002 -verão; Agosto/2002 -inverno). Foi coletado um total de 538 larvas de Phosichthyidae durante o verão e 158 no inverno. Três espécies, Pollichthys mauli, Vinciguerria nimbaria e Ichthyioccoccus sp. ocorreram na área, mas Ichthyioccoccus sp. foi extremamente rara representada somente por uma larva, capturada na região oceânica durante o verão. Geograficamente, as larvas estiveram concentradas na região oceânica e verticalmente entre a superfÃcie e 80 m de profundidade nos cruzeiros de verão e inverno. As larvas foram mais abundantes durante a noite, apresentando uma migração vertical diária na coluna d'água. Os resultados sugerem um importante papel dos meandramentos e vórtices da Corrente do Brasil no transporte e padrões de distribuição das larvas dos Phosichthyidae nas áreas oceânica e nerÃtica do sudeste brasileiro.Conselho Nacional de Desenvolvimento CientÃfico e Tecnológico (CNPq
Patterns of distribution and abundance of larval phosichthyidae (actinopterygii, stomiiformes) in southeastern Brazilian waters
Padrões de distribuição horizontal e vertical e abundância de larvas de peixes de Phosichthyidae foram examinados a partir de arrastos oblÃquos e estratificados em águas do Sudeste Brasileiro, entre cabo de São Tomé (41ºW.; 22ºS.) e a ilha de São Sebastião (45ºW.; 24ºS.). A amostragem foi realizada durante dois cruzeiros (Janeiro/2002 -verão; Agosto/2002 -inverno). Foi coletado um total de 538 larvas de Phosichthyidae durante o verão e 158 no inverno. Três espécies, Pollichthys mauli, Vinciguerria nimbaria e Ichthyioccoccus sp. ocorreram na área, mas Ichthyioccoccus sp. foi extremamente rara representada somente por uma larva, capturada na região oceânica durante o verão. Geograficamente, as larvas estiveram concentradas na região oceânica e verticalmente entre a superfÃcie e 80 m de profundidade nos cruzeiros de verão e inverno. As larvas foram mais abundantes durante a noite, apresentando uma migração vertical diária na coluna d'água. Os resultados sugerem um importante papel dos meandramentos e vórtices da Corrente do Brasil no transporte e padrões de distribuição das larvas dos Phosichthyidae nas áreas oceânica e nerÃtica do sudeste brasileiro.Horizontal and vertical distribution patterns and abundance of larval phosichthyids were investigated from oblique and depth-stratified towns off Southeastern brazilian waters, from São Tomé cape (41ºW.; 22ºS.) to São Sebastião island (45ºW.; 24ºS.). The sampling was performed during two cruises (January/2002 -summer; August/2002 -winter). Overall 538 larvae of Phosichthyidae were collected during summer and 158 in the winter. Three species, Pollichthys mauli, Vinciguerria nimbaria and Ichthyioccoccus sp. occurred in the area, but Ichthyioccoccus sp. was extremely rare represented by only one specimen, caught in the oceanic region during the summer. Geographically, larval were concentrated in the oceanic region, and vertically distributed mainly between the surface and 80 m depth in the summer and winter. Larvae were more abundant during the night, performing a diel vertical migration in the water column. The results suggest that the meandering and eddies of Brazil Current play important role on the transport and distribution patterns of larval phosichthyids over the oceanic and neritic area in the Southeastern Brazil
Refinement of neuronal synchronization with gamma oscillations in the medial prefrontal cortex after adolescence
The marked anatomical and functional changes taking place in the medial prefrontal cortex (PFC) during adolescence set grounds for the high incidence of neuropsychiatric disorders with adolescent onset. Although circuit refinement through synapse pruning may constitute the anatomical basis for the cognitive differences reported between adolescents and adults, a physiological correlate of circuit refinement at the level of neuronal ensembles has not been demonstrated. We have recorded neuronal activity together with local field potentials in the medial PFC of juvenile and adult mice under anesthesia, which allowed studying local functional connectivity without behavioral or sensorial interference. Entrainment of pyramidal neurons and interneurons to gamma oscillations, but not to theta or beta oscillations, was reduced after adolescence. Interneurons were synchronized to gamma oscillations across a wider area of the PFC than pyramidal neurons, and the span of interneuron synchronization was shorter in adults than juvenile mice. Thus, transition from childhood to adulthood is characterized by reduction of the strength and span of neuronal synchronization specific to gamma oscillations in the mPFC. The more restricted and weak ongoing synchronization in adults may allow a more dynamic rearrangement of neuronal ensembles during behavior and promote parallel processing of information.Fil: de Almeida, Julián. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de FisiologÃa de Circuitos Neuronales; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Jourdan, Iván. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de FisiologÃa de Circuitos Neuronales; Argentina. Universidad de Buenos Aires. Facultad de IngenierÃa; ArgentinaFil: Murer, Mario Gustavo. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de FisiologÃa de Circuitos Neuronales; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Belforte, Juan Emilio. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de FisiologÃa de Circuitos Neuronales; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentin
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