A Model for Energy-Awareness in Federated Cloud Computing Systems with Service-Level Agreements

International audienceAs data centers increase in size and computational capac- ity, numerous infrastructure issues become critical. Energy efficient is one of these issues because of the constantly increasing power consump- tion of CPUs, memory, and storage devices. A study shows that the whole energy consumed by data centers will be extremely high and it is like to overtake airlines in terms of carbon emissions. In that scenario, Cloud computing is gaining popularity since it can help companies to reduce costs and carbon footprint, usually distributing execution of ser- vices across distributed data centers. The research aims of this work are to propose and evaluate a Model for Federated Clouds that takes into account power consumption and Quality of Service (QoS) requirements. In our model, the energy reduction shall not result in negative impacts to the agreements between Cloud users and Cloud providers. Therefore, the model should ensure both energy-efficiency and QoS parameters, which sets up possibly conflicting objectives

A Fine-grained Approach for Power Consumption Analysis and Prediction

Power consumption has became a critical concern in modern computing systems for various reasons including financial savings and environmental protection. With battery powered devices, we need to care about the available amount of energy since it is limited. For the case of supercomputers, as they imply a large aggregation of heavy CPU activities, we are exposed to a risk of overheating. As the design of current and future hardware is becoming more and more complex, energy prediction or estimation is as elusive as that of time performance. However, having a good prediction of power consumption is still an important request to the computer science community. Indeed, power consumption might become a common performance and cost metric in the near future. A good methodology for energy prediction could have a great impact on power-aware programming, compilation, or runtime monitoring. In this paper, we try to understand from measurements where and how power is consumed at the level of a computing node. We focus on a set of basic programming instructions, more precisely those related to CPU and memory. We propose an analytical prediction model based on the hypothesis that each basic instruction has an average energy cost that can be estimated on a given architecture through a series of micro-benchmarks. The considered energy cost per operation includes all of the overhead due to context of the loop where it is executed. Using these precalculated values, we derive an linear extrapolation model to predict the energy of a given algorithm expressed by means of atomic instructions. We then use three selected applications to check the accuracy of our prediction method by comparing our estimations with the corresponding measurements obtained using a multimeter. We show a 9.48\% energy prediction on sorting

Photovoltaic water pumping system for small power conventional AC pumps

The interest of photovoltaic (PV) water pumping systems with standard components is increasing as a low cost and independent solution over dedicated systems. However, one of the challenges of this alternative is the fact that small power systems to drive power pumps require a small number of PV modules and the PV string voltage is, usually, not enough to feed the frequency converter. This paper presents an approach to the drive, using a DC/DC converter with maximum power point tracking (MPPT). The overall system has been tested on a real experimental platform.info:eu-repo/semantics/publishedVersio

Excalibur: An Autonomic Cloud Architecture for Executing Parallel Applications

International audienceIaaS providers often allow the users to specify many re-quirements for their applications. However, users without advanced technical knowledge usually do not provide a good specification of the cloud environment, leading to low per-formance and/or high monetary cost. In this context, the users face the challenges of how to scale cloud-unaware ap-plications without re-engineering them. Therefore, in this paper, we propose and evaluate a cloud architecture, namely Excalibur, to execute applications in the cloud. In our ar-chitecture, the users provide the applications and the archi-tecture sets up the whole environment and adjusts it at run-time accordingly. We executed a genomics workflow in our architecture, which was deployed in Amazon EC2. The ex-periments show that the proposed architecture dynamically scales this cloud-unaware application up to 10 instances, re-ducing the execution time by 73% and the cost by 84% when compared to the execution in the configuration specified by the user

O controle estatístico de processos no monitoramento da fabricação em uma empresa no ramo colchoeiro / The statistical control of processes in manufacturing monitoring in a company of mattress

Este trabalho descreve a aplicabilidade das ferramentas do controle estatístico de processos em uma situação específica, justificada pela preocupação em reduzir os itens não conformes produzidos. Diante da acirrada concorrência e recessão com relação às vendas, é de fundamental importância para as organizações manter a melhoria contínua para reduzir a variabilidade de seus processos. O objetivo do trabalho é analisar a variabilidade do processo produtivo de um colchão de mola por intermédio dos índices de capabilidade e gráficos de controle da empresa X. Este propósito foi alcançado mediante revisão bibliográfica com buscas em artigos científicos, livros e revistas especializadas sobre temas pertinentes a pesquisa, como gestão da qualidade total nos produtos e controle estatístico de processos, seguido de um estudo de caso. Este, foi desenvolvido a partir de coleta de dados através de visitas in loco e seleção de amostras semanais para verificação da conformidade das dimensões dos colchões. Posteriormente, os dados foram inseridos no programa Minitab 16.0 para que fosse feita a análise e a interpretação das variações encontradas no produto escolhido. Assim sendo, foi possível trabalhar com algumas das principais técnicas do controle estatístico a fim de reduzi-las. O embasamento teórico, a compilação e análise dos gráficos desenvolvidos, permitiram aos autores do trabalho analisar que, embora encontrados alguns itens não conformes, o processo de modo geral encontrava-se controlado e capaz, ou seja, dentro das especificações exigidas no produto pela empresa fabricante.  

Proposal of a non-linear model to adjust in vitro gas production at different incubation times

This work aims to propose a new model named Gompertz-Von Bertalanffy bicompartmental (GVB), a combination of the models Gompertz and Von Bertalanffy. The GVB models is applied to fit the kinetic curve of cumulative gas production (CGP) of four foods (SS – sunflower silage; CS – corn silage; and the mixtures 340SS – 660 gkg-1 of corn silage and 340 gkg-1 of sunflower silage; and 660SS – 340 gkg-1 of corn silage and 660 gkg-1 of sunflower silage). The GVB fit is compared to models Logistic-Von Bertalanffy bicompartmental (LVB) and bicompartmental logistic (BL). All the process studied employed the semi-automatic “in vitro” technique of producing gases used in ruminant nutrition. The gas production readout was performed at times 2, 4, 6, 8, 10, 12, 15, 19, 24, 30, 48, 72, and 96 h. The data generated were used to estimate the models’ parameters by the least squared method with the iterative Gauss-Newton process. The data fit quality of the models was verified using the adjusted coefficient of determination criterion (), mean residual square (MRS), Akaike information criterion (AIC), and mean absolute deviation (MAD). Among the analyzed models, the LVB model presented the best quality of fit evaluators for CS. In contrast, the GVB model showed better quality of fit to describe CGP over time for 340SS, 660SS, and SS, presenting the highest values of () and the lowest values of MSR, AIC, and MAD

Social Security Status of HIV-Patients in Brazil

The studies show that HIV/AIDS disease had and is having a high impact on Populations' health but it represents serious socioeconomic problems added for individuals, families, communities and Governments of many countries. In Brazil, the National Standardization Panel of the Federal Courts, the body that comprises the Brazilian National Council of Justice, drafted the docket 78. From this docket, to grant or deny the social security benefi, the judges will not have their decisions limited only to the clinical aspects of medical experts report,starting to also consider the personal, economic, social and cultural aspects of the HIV patient. By analyzing the cases heard by Federal Court of the 5th Region, which constitutes the Brazilian states of Paraíba, Pernambuco, Rio Grande do Norte, Ceará, Alagoas and Sergipe, fourteen cases were found on appeal of special courts. Within those cases, ten were founded to be HIV positive and were granted some sort of pension and welfare benefi, and four were rejected, denying incoming thus those patients with syndrome, the right to receive benefis. The Brazilian Federal Government through the Provisional Measure no 664 from 2014 excluded the art. 151 of the Federal Law 8. 213/91 which dealt with the granting sickness benefi and disability retirement to patients with various disabling conditions which among the HIV saving a total of 18 million to public coffers.The authors point out that the exclusion or this article constitutes the loss of benefis–sickness assistance and disability retirement– those who do not have a minimum period of contribution to Social Security. That constitutes prejudice to the HIV patient´s rights in relation helpless leaving them to State coverage. In this context HIV/AIDS diagnosis not only adversely affects individual health and survival but may be associated with higher also need for care, thus resulting in higher expenses for the healthcare system

COMPLICAÇÕES DE DEISCÊNCIA DOS TECIDOS MOLES PERI-IMPLANTARES: UMA REVISÃO DOS FATORES ASSOCIADOS E FREQUÊNCIA DE OCORRÊNCIA.

  Given the importance of associated factors and the need for appropriate preventive strategies, this study aims to review the existing literature on complications of peri-implant soft tissue dehiscence, analyzing the associated factors and frequency of occurrence. From this review, we intend to provide a solid scientific basis for the implementation of clinical practices that minimize the incidence of this complication and improve the results of treatments with dental implants. The results of this review emphasize the importance of a multifaceted approach to preventing and managing peri-implant soft tissue dehiscence. The quality of the gingival tissues, the surgical technique, the type and positioning of the implant, the patient's oral hygiene, and rigorous post-operative care are crucial determinants. Furthermore, systemic and environmental factors, the biocompatibility of implant materials, and the surgeon's experience play significant roles. Multidisciplinary collaboration and technological advances emerge as important allies to improve clinical results. Therefore, careful assessment and detailed planning are essential to reduce complications and ensure the long-term success of dental implants, promoting a better quality of life for patients.Diante da importância dos fatores associados e da necessidade de estratégias preventivas adequadas, este estudo tem como objetivo revisar a literatura existente sobre as complicações de deiscência dos tecidos moles peri-implantares, analisando os fatores associados e a frequência de ocorrência. A partir dessa revisão, pretende-se fornecer uma base científica sólida para a implementação de práticas clínicas que minimizem a incidência dessa complicação e melhorem os resultados dos tratamentos com implantes dentários. Os resultados desta revisão enfatizam a importância de uma abordagem multifacetada para prevenir e gerenciar a deiscência dos tecidos moles peri-implantares. A qualidade dos tecidos gengivais, a técnica cirúrgica, o tipo e o posicionamento do implante, a higiene bucal do paciente, e os cuidados pós-operatórios rigorosos são determinantes cruciais. Além disso, fatores sistêmicos e ambientais, a biocompatibilidade dos materiais dos implantes, e a experiência do cirurgião desempenham papéis significativos. A colaboração multidisciplinar e os avanços tecnológicos emergem como aliados importantes para melhorar os resultados clínicos. Portanto, uma avaliação cuidadosa e um planejamento detalhado são essenciais para reduzir as complicações e garantir o sucesso a longo prazo dos implantes dentários, promovendo uma melhor qualidade de vida para os pacientes

Multidifferential study of identified charged hadron distributions in ZZ-tagged jets in proton-proton collisions at s=\sqrt{s}=13 TeV

Jet fragmentation functions are measured for the first time in proton-proton collisions for charged pions, kaons, and protons within jets recoiling against a $Z$ boson. The charged-hadron distributions are studied longitudinally and transversely to the jet direction for jets with transverse momentum 20 $< p_{\textrm{T}} < 100$ GeV and in the pseudorapidity range $2.5 < \eta < 4$. The data sample was collected with the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.64 fb$^{-1}$. Triple differential distributions as a function of the hadron longitudinal momentum fraction, hadron transverse momentum, and jet transverse momentum are also measured for the first time. This helps constrain transverse-momentum-dependent fragmentation functions. Differences in the shapes and magnitudes of the measured distributions for the different hadron species provide insights into the hadronization process for jets predominantly initiated by light quarks.Comment: All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-013.html (LHCb public pages