Data center plays an important role in cloud computing. Cloud computing provides novel perspectives in Internet technologies and raises issues in the architecture, protocol, and implementation of existing networks and...
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Data center plays an important role in cloud computing. Cloud computing provides novel perspectives in Internet technologies and raises issues in the architecture, protocol, and implementation of existing networks and data centers. Although various cloud-based data center architectures have been proposed in recent years, some challenging issues, e.g., congestion control, load balancing and energy efficiency, still need to be addressed. In this paper, we present the designs of network architecture for data center servers, and then analyze and compare several promising solutions to tackle those challenging problems.
An age wave is upon us, and many tech-savvy older adults are reaching retirement. To explore the barriers and benefits of engaging this population, promote an active post-working life, and foster community, we plan to...
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An age wave is upon us, and many tech-savvy older adults are reaching retirement. To explore the barriers and benefits of engaging this population, promote an active post-working life, and foster community, we plan to involve retired programmers in the development of a free/open source software (FOSS) health and wellness application. FOSS communities are dominated by young male developers, and can be hostile to outsiders despite a shared philosophical alignment of altruistic motivations often embraced by retirees. I expect to contribute to the field by exploring the benefits and barriers of involving older adults in FOSS communities, as well as how they can benefit each other by collaborating to develop a meaningful product with and for older adults.
We derive a semi-analytical expression for the uplink inter-cell interference (ICI) assuming proportional fair scheduling (with a maximum normalized signal-to-noise ratio (SNR) criterion) deployed in the cellular netw...
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We derive a semi-analytical expression for the uplink inter-cell interference (ICI) assuming proportional fair scheduling (with a maximum normalized signal-to-noise ratio (SNR) criterion) deployed in the cellular network. The derived expression can be customized for different models of channel statistics that can capture path loss, shadowing, and fading. Firstly, we derive an expression for the distribution of the locations of the allocated user in a given cell. Then, we derive the distribution and moment generating function of the uplink ICI from one interfering cell. Finally, we determine the moment generating function of the cumulative uplink ICI from all interfering cells. The derived expression is utilized to evaluate important network performance metrics such as outage probability and fairness among users. The accuracy of the derived expressions is verified by comparing the obtained results to Monte Carlo simulations.
Recently, several Gaussian like image representations are proposed as an alternative of the bag-of-word representation over local features. These representations are proposed to overcome the quantization error problem...
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ISBN:
(纸本)9781467316590
Recently, several Gaussian like image representations are proposed as an alternative of the bag-of-word representation over local features. These representations are proposed to overcome the quantization error problem faced in bag-of-word representation. They are shown to be effective in different applications, the Extended Hierarchical Gaussianization reached excellent performance using single feature in VOC2009, Vector of Locally Aggregated Descriptors and Fisher Kernel reached excellent performance using only signature like representation on Holiday dataset. Despite their success and similarity, no comparative study about these representations has been made. In this paper, we perform a systematic comparison about three emerging different gaussian like representations: Extended Hierarchical Gaussianization, Fisher Kernel and Vector of Locally Aggregated Descriptors. We evaluate the performance and the influence of feature and parameters of these representations on Holiday and CC_Web_Video datasets, and several important properties about these representations have been observed during our investigation. This study provides better understanding about these gaussian like image representations that are believed to be promising in various applications.
This study was motivated by the possibility of using N resonant levels interacting with the GaAs conduction band, in GaNxAs1−x (0<x<2.5%), to enhance the density of states effective mass (md) and consequently th...
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This study was motivated by the possibility of using N resonant levels interacting with the GaAs conduction band, in GaNxAs1−x (0
Automatic detection of characteristic patterns of diabetic retinopathy such as hard exudates may help to an early diagnosis. Methods for automatic detection of hard exudates and optic disc are presented. Exudates dete...
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ISBN:
(纸本)9789898425898
Automatic detection of characteristic patterns of diabetic retinopathy such as hard exudates may help to an early diagnosis. Methods for automatic detection of hard exudates and optic disc are presented. Exudates detection involves a preprocessing stage, threshold selection and region growing. For optic disc detection a Bayes classifier is applied followed by mathematical morphology techniques in order to improve the final result. The methods here presented were evaluated using the IMAGERET database, which contains fundus images evaluated by qualified experts. In average, the area of exudates automatically detected overlaped with 60.75% and 63.91% areas defined by each of the two experts. For optic disc detection, sensitivity and specificity were 72.12% and 95.56% respectively.
The proposed work is a project based research methodology inspired by IRPM-Interdisciplinary Research Project Management,and its goal is to support the development of biodiesel from oilseed native Cerrado,thus promoti...
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The proposed work is a project based research methodology inspired by IRPM-Interdisciplinary Research Project Management,and its goal is to support the development of biodiesel from oilseed native Cerrado,thus promoting sustainable development of the region Bico do Papagaio,state of ***,this work intends to be a platform that facilitates future systematic reviews and meta-analyzes,through standardization of procedures and their sequence,because only a well defined and general methodology will provide clarity and allow experimentation reproducibility in a rigorous ***,it is shown that IRPM is a strategy that helps produce more publications.
Evolution involves only a few simple processes, yet the resulting dynamics are surprisingly rich and complex. Sewall Wright developed the metaphor of fitness landscapes to provide deeper insight into the complex worki...
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Complex inorganic brown pigments having a high near infrared solar reflectance have been synthesized. Fe2O3 is the host component and mixtures of Sb2O3, SiO2, Al2O3, and TiO2 were used as the guest components. Sb2O3, ...
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Complex inorganic brown pigments having a high near infrared solar reflectance have been synthesized. Fe2O3 is the host component and mixtures of Sb2O3, SiO2, Al2O3, and TiO2 were used as the guest components. Sb2O3, SiO2, Al2O3, and TiO2 were mixed into 40 different compositions. It was found that a sample, denoted by S31, with a composition of Fe2O3, Sb2O3, SiO2, Al2O3, and TiO2 of 70, 10, 12, 2 and 6 wt% respectively, gives a maximum near infrared solar reflectance of 46.7%. Brown pigment colours were measured in CIE L*a*b* colour index. The S31 pigment powder was then prepared as a reflective coating material with different amounts of pigment powder from 4-8 g in 100 g of ceramic glaze. The prepared materials were sprayed on the biscuit clay tiles for reflectance measurements. It was found that 5 g of S31 pigment powder mixed with 100 g of ceramic glaze gives the highest near-infrared reflectance value of 41.3%. The newly synthesized pigment is a suitable ceramic roof coating for its high reflectance performance and the durability performing once the ceramic roof installed on house.
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