Improving Storage Performance Through Layout Optimizations

Disk drives are the bottleneck in the processing of large amounts of data used in almost all common applications. File systems attempt to reduce this by storing data sequentially on the disk drives, thereby reducing the access latencies. Although this strategy is useful when data is retrieved sequentially, the access patterns in real world workloads is not necessarily sequential and this mismatch results in storage I/O performance degradation. This thesis demonstrates that one way to improve the storage performance is to reorganize data on disk drives in the same way in which it is mostly accessed. We identify two classes of accesses: static, where access patterns do not change over the lifetime of the data and dynamic, where access patterns frequently change over short durations of time, and propose, implement and evaluate layout strategies for each of these. Our strategies are implemented in a way that they can be seamlessly integrated or removed from the system as desired. We evaluate our layout strategies for static policies using tree-structured XML data where accesses to the storage device are mostly of two kinds - parent-tochild or child-to-sibling. Our results show that for a specific class of deep-focused queries, the existing file system layout policy performs better by 5-54X. For the non-deep-focused queries, our native layout mechanism shows an improvement of 3-127X. To improve performance of the dynamic access patterns, we implement a self-optimizing storage system that performs rearranges popular block accesses on a dedicated partition based on the observed workload characteristics. Our evaluation shows an improvement of over 80% in the disk busy times over a range of workloads. These results show that applying the knowledge of data access patterns for allocation decisions can substantially improve the I/O performance.

Especificações e concepções de front-end UHF integrado e multipadrão em tecnologia CMOS 130nm

The Brazilian Environmental Data Collecting System (SBCDA) collects and broadcasts meteorological and environmental data, to be handled by dozens of institutions and organizations. The system space segment, composed by the data collecting satellites, plays an important role for the system operation. To ensure the continuity and quality of these services, efforts are being made to the development of new satellite architectures. Aiming a reduction of size and power consumption, the design of an integrated circuit containing a receiver front-end is proposed, to be embedded in the next SBCDA satellite generations. The circuit will also operate under the requirements of the international data collecting standard ARGOS. This work focuses on the design of an UHF low noise amplifier and mixers in a CMOS standard technology. The specifi- cations are firstly described and the circuit topologies presented. Then the circuit conception is discussed and the design variables derived. Finally, the layout is designed and the final results are commented. The chip will be fabricated in a 130 nm technology from ST Microelectronics.

Uma leitura atual do bairro da Ribeira em Natal/RN a partir dos dois circuitos da economia urbana

The present study aims to analyze the spatial organization of the Ribeira district in Natal/ RN from the two circuits of the urban economy. For its realization, was used the bibliographical, documentary and field research. From the information collected in the field research and of secondary data was elaborated the maps, tables, graphics, frames and photographic collections. In the analysis of the results identified the presence of two circuits of the urban economy in the said neighborhood, thus as the predominance of the upper circuit compared to the lower circuit between the surveyed establishments, well as the role that each of the circuits represents to their spatial organization. Some variables such as technology, organization, information, publicity and consumption were important to establish the main differences between the circuits.

Aplicação de tratamentos eletroquímicos integrados para remediação de solos e águas contaminadas com petróleo e pesticidas

Electrochemical technologies have been proposed as a promising alternative for the treatment of effluents and contaminated soils. Therefore, the objective of this work was to study the treatment of contaminated soils and wastewaters using electrochemical technologies. Thus, the study regarding the scale-up of the electrochemical system with continuous flow treatment of wastewater of the petrochemical industry was investigated using platinum electrodes supported on titanium (Ti / Pt), and boron-doped diamond (BDD). The results clearly showed that under the operating conditions studied and electrocatalytic materials employed, the better removal efficiency was achieved with BDD electrode reducing the chemical oxygen demand (COD) from 2746 mg L-1 to 200 mg L-1 in 5 h consuming 56.2 kWh m-3 . The decontamination of soils and effluents by petrochemical products was evaluated by studying the effects of electrokinetic remediation for removal of total petroleum hydrocarbons (HTP) from contaminated soil with diesel. The efficiency of this process was dependent on the electrolyte used Na2SO4 (96.46%), citric acid (81.36%) and NaOH (68.03%) for 15 days. Furthermore, the effluent after treatment of the soil was treated by electrochemical oxidation, achieving a good elimination of the organic polluting load dissolved. Depending on the physical behavior of wastewater contaminated with oil (emulsified state); atrazine emulsified effluents were investigated. The main characteristics of the effluent produced during the washing of contaminated soil were studied, being dependent on the surfactant dosage used; which determined its electrolytic treatment with BDD. The electrochemical oxidation of emulsified effluent of atrazine was efficient, but the key to the treatment is reducing the size of micelles.

Portrait of Carol Spinka, commercial artist preparing layout

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Perspectiva sociológica en el estudio de la calidad del suelo y los indicadores integrados

El objetivo de este trabajo consiste en analizar la relevancia de construir indicadores integrados para estudiar la calidad de suelos a nivel regional, desde la perspectiva sociológica, considerando el impacto de la acción humana sobre la naturaleza. Por una parte, para acordar criterios y poder compararlos dentro del marco geográfico de los países integrantes del MERCOSUR; también, para monitorearlos en el tiempo constatando la evolución de algunas propiedades del recurso que permiten la identificación de niveles críticos de deterioro

Perspectiva sociológica en el estudio de la calidad del suelo y los indicadores integrados

El objetivo de este trabajo consiste en analizar la relevancia de construir indicadores integrados para estudiar la calidad de suelos a nivel regional, desde la perspectiva sociológica, considerando el impacto de la acción humana sobre la naturaleza. Por una parte, para acordar criterios y poder compararlos dentro del marco geográfico de los países integrantes del MERCOSUR; también, para monitorearlos en el tiempo constatando la evolución de algunas propiedades del recurso que permiten la identificación de niveles críticos de deterioro

Perspectiva sociológica en el estudio de la calidad del suelo y los indicadores integrados

El objetivo de este trabajo consiste en analizar la relevancia de construir indicadores integrados para estudiar la calidad de suelos a nivel regional, desde la perspectiva sociológica, considerando el impacto de la acción humana sobre la naturaleza. Por una parte, para acordar criterios y poder compararlos dentro del marco geográfico de los países integrantes del MERCOSUR; también, para monitorearlos en el tiempo constatando la evolución de algunas propiedades del recurso que permiten la identificación de niveles críticos de deterioro

Fatores de sucesso na implementação de sistemas integrados de gestão empresarial (ERP): estudo de caso em uma média empresa

RAMOS, A. S. M.; OLIVEIRA, M. A. Fatores de sucesso na implementação de sistemas integrados de gestão empresarial (ERP): estudo de caso em uma média empresa. In: ENCONTRO NACIONAL DE ENGENHARIA DE PRODUÇÂO, 22., 2002, Curitiba-PR. Anais... Porto Alegre-RS: ABEPRO, 2002. v. 1.

Resiliência, Coping e Autocompaixão em Cuidadores Formais da Rede Nacional de Cuidados Continuados Integrados

Introdução: Na literatura internacional e nacional verifica-se a inexistência de estudos sobre os correlatos psicológicos de cuidadores formais, como a resiliência e o coping. Apesar de se reconhecer a importância de uma prestação de cuidados mais compassivos e humanizados, mais uma vez, não existem estudos nesta área. Este facto estende-se aos cuidadores formais que trabalham com pessoas em situação de dependência, na Rede Nacional de Cuidados Continuados Integrados. Assim, foram nossos objetivos: caraterizar os cuidadores formais de algumas Unidades de Cuidados Continuados (UCC) da RNCCI em variáveis sociodemográficas e profissionais; analisar os seus níveis de resiliência, coping e autocompaixão; verificar se existem associações significativas entre estas variáveis e com as variáveis sociodemográficas e profissionais. Metodologia: 78 cuidadores formais (sexo feminino, n = 76; 97,4%), com uma média de idades de 35,45 anos (DP = 9,0) forneceram o seu consentimento informado para preencherem um questionário sociodemográfico e profissional, a Escala de Avaliação Global da Resiliência, o Brief COPE e a Self Compassion Scale (SELFCS). Resultados: Os cuidadores revelaram um nível médio de resiliência (total). A dimensão de coping com média mais elevada foi o Coping ativo e a com média mais baixa foi o Uso de substâncias. Na SELFCS a dimensão com média mais elevada foi o Calor/compreensão e a com média mais baixa foi o Isolamento. No geral, a pontuação total de resiliência correlacionou-se de forma positiva com as dimensões positivas da autocompaixão (SELFCS) e de forma negativa com as dimensões negativas desta escala. As dimensões mais positivas de coping correlacionaram-se de forma positiva com as dimensões positivas de autocompaixão e as mais negativas de coping com as dimensões negativas de autocompaixão. Quanto maior a idade dos cuidadores menor o nível de Suporte Emocional e maior o nível de Religião e Mindfulness. Mais horas de trabalho associaram-se a menor resiliência e a maior nível de Suporte Emocional Discussão: Este estudo revelou, ainda que numa amostra reduzida, que os cuidadores formais das UCC parecem revelar níveis equilibrados em correlatos psicológicos importantes quando se “cuida” de outra pessoa. Porém, as UCC devem preocupar-se em fomentar, junto dos cuidadores, níveis mais elevados de resiliência, estratégias mais positivas de coping e a compaixão auto e hétero dirigida, para assegurar um “cuidar” mais pleno quer para os profissionais, quer para aqueles que são cuidados. / Introduction: In the international and national literature, we verified the inexistence of studies about psychological correlates of formal caregivers, such as resilience and coping. Although the importance of more humanized and compassive care is recognized, again, there are no studies in this area. This is also verified regarding formal caregivers that work with people in a dependence situation, as in the National Network of Continuous Care. Our aims were to characterize the formal caregivers from some units of the National Network of Continuous Care in sociodemographic and professional variables; analyze these professionals levels of resilience, coping and self-compassion; verify if there are significant associations between these variables and with the sociodemographic and professional variables. Methodology: 78 formal caregivers (female, n = 76; 97,4%), with an mean age of 35,45 years (SD = 9,0) provided their informed consent to fill in a professional and sociodemographic questionnaire, the Global Resiliency Evaluation Scale, the Brief COPE and the Self Compassion Scale (SELFCS). Results: The caregivers showed a medium level of resilience. The coping dimension with the highest mean was Active coping and the dimension with the lowest mean was Substance Use. Regarding SELFCS the dimension with the highest mean was Warmth, contrasting with Isolation, the dimension with the lowest mean. Overall, the total score of resilience was positively correlated with self-compassion positive dimensions (SELFCS) and negatively correlated with the negative dimensions of this scale. The most positive dimensions of coping were positively correlated with the positive dimensions of self-compassion and the most negative dimensions of coping were correlated with the negative dimensions of self-compassion. Older caregivers showed lower use of Emotional support and higher level of Religion and Mindfulness use. More daily hours of work were associated with less resilience and higher Emotional Support. Discussion: This study revealed, although in a small sample, that Continuous Care Units (CCU) formal caregivers seem to have balanced levels of psychological correlates that are important while caring for others. However, the CCU should promote, in the caregivers higher levels of resilience, coping and self-compassion, to ensure a better care, simultaneously the professionals and patients.

Construção das capacidades organizacionais de tecnologia da informação no contexto dos sistemas institucionais integrados de gestão da UFRN

The IT capability is a organizational ability to perform activities of this role more effectively and an important mechanism in creating value. Its building process (stages of creation and development) occurs through management initiatives for improvement in the performance of their activities, using human resources and IT assets complementary responsible for the evolution of their organizational routines. This research deals with the IT capabilities related to SIG (integrated institutional management systems), built and deployed in UFRN (Universidade Federal do Rio Grande do Norte) to realization and control of administrative, academic and human resources activities. Since 2009, through cooperative agreements with federal and educational institutions of direct administration, UFRN has supported the implementation of these systems, currently involving more than 30 institutions. The present study aims to understand how IT capabilities, relevant in the design, implementation and dissemination of SIG, were built over time. This is a single case study of qualitative and longitudinal nature, performed by capturing, coding and analysis from secondary data and from semi-structured interviews conducted primarily with members of Superintenência de Informática, organizational unit responsible for SIG systems in UFRN. As a result, the technical, of internal relationship and external cooperation capabilities were identified as relevant in the successful trajectory of SIG systems, which have evolved in different ways. The technical capacity, initiated in 2004, toured the stages of creation and development until it reached the stage of stability in 2013, due to technological limits. Regarding the internal relationship capability, begun in 2006, it toured the stages of creation and development, having extended its scope of activities in 2009, being in development since then. Unlike the standard life cycle observed in the literature, the external cooperation capability was initiated by an intensity of initiatives and developments in the routines in 2009, which were decreasing to cease in 2013 in order to stabilize the technological infrastructure already created for cooperative institutions. It was still identified the start of cooperation in 2009 as an important event selection, responsible for changing or creating trajectories of evolution in all three capacities. The most frequent improvements initiatives were of organizational nature and the internal planning activity has been transformed over the routines of the three capabilities. Important resources and complementary assets have been identified as important for the realization of initiatives, such as human resources technical knowledge to the technical capabilities and external cooperation, and business knowledge, for all of them, as well as IT assets: the iproject application for control of development processes, and the document repository wiki. All these resources and complementary assets grew along the capacities, demonstrating its strategic value to SINFO/UFRN

Ambulance Treatment Space Ergonomic Layout

This is the first time a multidisciplinary team has employed an iterative co-design method to determine the ergonomic layout of an emergency ambulance treatment space. This process allowed the research team to understand how treatment protocols were performed and developed analytical tools to reach an optimum configuration towards ambulance design standardisation. Fusari conducted participatory observations during 12-hour shifts with front-line ambulance clinicians, hospital staff and patients to understand the details of their working environments whilst on response to urgent and emergency calls. A simple yet accurate 1:1 mock-up of the existing ambulance was built for detailed analysis of these procedures through simulations. Paramedics were called in to participate in interviews and role-playing inside the model to recreate tasks, how they are performed, the equipment used and to understand the limitations of the current ambulance. The use of Link Analysis distilled 5 modes of use. In parallel, an exhaustive audit of all equipment and consumables used in ambulances was performed (logging and photography) to define space use. These developed 12 layout options for refinement and CAD modelling and presented back to paramedics. The preferred options and features were then developed into a full size test rig and appearance model. Two key studies informed the process. The 2005 National Patient Safety Agency funded study “Future Ambulances” outlined 9 design challenges for future standardisation of emergency vehicles and equipment. Secondly, the 2007 EPSRC funded “Smart Pods” project investigated a new system of mobile urgent and emergency medicine to treat patients in the community. A full-size mobile demonstrator unit featuring the evidence-based ergonomic layout was built for clinical tests through simulated emergency scenarios. Results from clinical trials clearly show that the new layout improves infection control, speeds up treatment, and makes it easier for ambulance crews to follow correct clinical protocols.

Ecosistemas circuitos de consumo de obras pìctóricas y escultóricas en Guayaquil y su extensión Samborondón, de octubre de 2012 a septiembre de 2013

Esta investigación, pretende hacer visibles los circuitos de arte pictórico y escultórico de la ciudad de Guayaquil, estudiando durante el periodo de octubre de 2012 a septiembre de 2013, la conformación de su sistema, la identificación de sus actores, sus visiones del arte, las interdependencias que los vinculan y la influencia del entorno, bajo una perspectiva de ecosistema. Este estudio no pretende ser un inventario de artistas, ni galerías, sino una primera exploración de la compleja temática del consumo del arte.