C.E.S.A.R.
  • Recife, Estado de Pernambuco, Brazil
Recent publications
Q&A forums are today a valuable tool to assist developers in programming tasks. Unfortunately, contributions to these forums are often unclear and incomplete. Docker is a container solution that enables software developers to encapsulate an operating environment and could help address reproducibility issues. This artile reports on a feasibility study to evaluate if Docker can help improve reproducibility in Stack Overflow. We started surveying Stack Overflow users to understand their perceptions on the proposal of using Docker to reproduce Stack Overflow posts. Participants were critical and mentioned two important aspects: cost and need. To validate their criticism, we conducted an exploratory study focused on understanding how costly the task of creating containers for posts is for developers. Overall, results indicate that the cost of creating containers is not high, especially due to the fact that dockerfiles are highly similar and small. Based on these findings we developed a tool, dubbed Frisk , to assist developers in creating containers for those posts. We then conducted a user study to evaluate interest of Stack Overflow developers on the tool. We found that, on average, users spent nearly ten minutes interacting with Frisk and that 45.3% of the 563 Frisk sessions we created for existing posts resulted in a successful access to the corresponding web service by the owners of the post. Overall, this artile provides early evidence that the use of Docker in Q&A forums should be encouraged for configuration-related posts.
The digital world is a reality for big companies looking through new alternatives to reach tanned and new users. The carnival is a celebration of Brazilian culture and motivated us to align the areas of interaction design, usability, and branding. The purpose of this article is to propose a new use of Facebook’s Live Action interaction tool, creating animated and interactive content that seeks to increase user engagement. In general, we use the inputs on interaction design of Norman [9], Saffer [3] and Rogers (2013), gestalt context with Gomes Filho [6] and games through Schell [8] and Salen & Zimmerman [2]. Through the case study of the game Carnavalia, it is approached how the process of game design and UX, applied to a mass event, can enhance the interaction of the tool bringing quantifiable and positive returns for product or brand exposure.
Communication is still one of the main challenges of distributed software development and it is important for distributed teams to be able to maintain effective communication, i.e., to communicate properly and in a timely manner to facilitate the management of project activities and then to contribute to the process quality. Communication is also a critical aspect for Software Reuse in global development since it affects trust and can foster the not-invented-here syndrome. In order to handle such challenge, this paper presents an evaluation of a preliminary version of an assessment method for identifying communication maturity, based on the Communication Maturity Model (C2M), a model that supports the improvement of communication processes and practices in distributed organizations. We present the preliminary assessment method definition and its evaluation results obtained during two focal group sessions with IT professionals. Findings include a positive and promising perception on the benefits of adopting this method, and a demand for further work towards its maturation.
The Consumer Behavior area has developed over the years an extensive body of knowledge related to cultural, social and psychological factors that would influence the consumer at the time of purchase. The Design area could benefit from these findings by trying to incorporate some of this knowledge in a systematic way in its Design Methodology. This research aims to investigate if cultural aspects may be able to describe the behavior of group of individuals. Thus, this article describes an experiment where it was applied Hofstede's cultural model to compare a group of students regarding cultural aspects. The data collected showed that the groups presented differences and similarities regarding their cultural values, however it was not possible to generalize the findings and infer that similar groups would present the analogous results.
Integrated pest management in Australian winter grain crops is challenging, partly because the timing and severity of pest outbreaks cannot currently be predicted, and this often results in prophylactic applications of broad spectrum pesticides. We developed a simple model to predict the median emergence in autumn of pest populations of the redlegged earth mite, Halotydeus destructor, a major field crop and pasture pest in southern Australia. Previous data and observations suggest that rainfall and temperature are critical for post-diapause egg hatch. We evaluated seven models that combined rainfall and temperature thresholds derived using three approaches against previously recorded hatch dates and 2013 field records. The performance of the models varied between Western Australia and south-eastern Australian States. In Western Australia, the key attributes of the best fitting model were more than 5 mm rain followed by mean day temperatures of below 20.5 °C for 10 days. In south-eastern Australia, the most effective model involved a temperature threshold reduced to 16 °C. These regional differences may reflect adaptation of H. destructor in south-eastern Australia to varied and uncertain temperature and rainfall regimes of late summer and autumn, relative to the hot and dry Mediterranean-type climate in Western Australia. Field sampling in 2013 revealed a spread of early hatch dates in isolated patches of habitat, ahead of predicted paddock scale hatchings. These regional models should assist in monitoring and subsequent management of H. destructor at the paddock scale.
BackgroundA key component for spray decision-making in IPM programmes is the establishment of economic injury levels (EIL) and economic thresholds (ET). We aimed to establish an EIL for the redlegged earth mite (Halotydeus destructor Tucker) on canola.ResultsComplex interactions between mite numbers, feeding damage and plant recovery were found, highlighting the challenges in linking H. destructor numbers to yield. A guide of 10 mites per plant was established at the 1st true leaf stage; however simple relationships were not evident at other crop development stages, making it difficult to establish reliable EILs based on mite number. Yield was however strongly associated with plant damage and plant densities, reflecting the impact of mite feeding damage and indicating a plant-based alternative for establishing thresholds for H. destructor. Drawing on data from multiple field trials, we show that plant densities below 30–40 per m2 could be used as a proxy for mite damage when reliable estimates of mite densities are not possible.Conclusion This plant-based threshold provides a practical tool that avoids the difficulties of accurately estimating mite densities. The approach may be applicable to other situations where production conditions are unpredictable and interactions between pests and plant hosts are complex.
Development of sampling techniques to effectively estimate invertebrate densities in the field is essential for effective implementation of pest control programs, particularly when making informed spray decisions around economic thresholds. In this article, we investigated the influence of several factors to devise a sampling strategy to estimate Halotydeus destructor Tucker densities in a canola paddock. Direct visual counts were found to be the most suitable approach for estimating mite numbers, with higher densities detected than the vacuum sampling method. Visual assessments were impacted by the operator, sampling date, and time of day. However, with the exception of operator (more experienced operator detected higher numbers of mites), no obvious trends were detected. No patterns were found between H. destructor numbers and ambient temperature, relative humidity, wind speed, cloud cover, or soil surface conditions, indicating that these factors may not be of high importance when sampling mites during autumn and winter months. We show further support for an aggregated distribution of H. destructor within paddocks, indicating that a stratified random sampling program is likely to be most appropriate. Together, these findings provide important guidelines for Australian growers around the ability to effectively and accurately estimate H. destructor densities.
Drawback is a special customs regime that allows the exemption, suspension or refunds the payment of taxes on the import of raw material used in the production of goods for export. Thus, this study aims to analyze the use of the Drawback customs regime in logistics operations of exporting companies of Southern Santa Catarina. Methodologically, the study was characterized as a descriptive research as to the purposes and bibliographical and field research as to the means. The target population was defined by producing exporters of Southern Santa Catarina, characterized by 44 companies participating in the survey, and only 13 are users of the Customs Drawback scheme. The data collection instrument was a questionnaire via Google Docs, sent directly to professionals in the export and import departments. Data analysis was mainly qualitative. It was found that the users or companies who have used the scheme, are medium and large, consolidated in the international market and mostly belong to the chemical and ceramic sector. In using the system, companies highlight the reduction in logistics costs, support before sales in the foreign market and procurement of raw materials cheaper in relation to domestic. Highlight the lack of trained professionals and high-tax corporate control as obstacles in the use of the customs procedure Drawback.
The green peach aphid, Myzus persicae (Sulzer), is a serious pest throughout the world, attacking a broad range of crop plants across numerous agricultural industries. This species has a high propensity to develop chemical resistance, and has the unenviable title of having resistance to more insecticides than any other insect species. An extensive survey of field populations was undertaken across Australia, and showed widespread and high levels of resistance to carbamates and synthetic pyrethroids in M. persicae. Moderate levels of resistance to organophosphates were also observed in many populations, while there is new evidence of resistance developing to neonicotinoids. Isofemale (clonal) lines of M. persicae were generated and subsequently tested across a range of insecticides; individual genetic clones were found to contain resistance to multiple chemical classes. Resistance genotyping of these aphids were consistent with published literature of known resistant mechanisms. The high and widespread levels of resistance identified within Australia are concerning. Resistance in M. persicae has spread quickly across Australia, and thus farmers are likely to have fewer chemical control options in the future. There is a need to develop resistance management strategies that rotate insecticides, spray insecticides only when economically necessary, and incorporate nonchemical control options.
The red crab, Gecarcoidea natalis, is endemic to Christmas Island in the Indian Ocean and largely responsible for shaping the unique ecosystem found throughout the island's rainforests. However, the introduction and establishment of supercolonies of the highly invasive yellow crazy ant, Anoplolepis gracilipes, has decimated red crab numbers over the last several decades. This poses a significant risk to the future conservation of G. natalis and consequently threatens the integrity of the unique island ecosystem. Here we undertook a population genetic analysis of G. natalis using a combination of 11 microsatellite markers and sequencing of the mitochondrial cytochrome oxidase subunit I gene from samples collected on Christmas Island as well as a single location from North Keeling Island (located approximately 900 km west of Christmas Island). The genetic results indicate that G. natalis is a single panmictic population on Christmas Island, with no spatial genetic structure or restricted gene flow apparent between sampled locations. Further, G. natalis from North Keeling Island are not genetically distinct and are recent immigrants from Christmas Island. The effective population size of G. natalis has likely remained large and stable on Christmas Island throughout its evolutionary history with relatively moderate to high levels of genetic diversity in microsatellite loci and mitochondrial haplotypes assessed in this study. For management purposes G. natalis can be considered a single panmictic population, which should simplify conservation efforts for the genetic management of this iconic island species.
Background Analgesics are among the most commonly consumed drugs by the world populations. Within the broader context of self-medication, pain relief occupies a prominent position. Our study was to ascertain the prevalence of self-medication with analgesics among the Spanish population and to identify predictors of self-medication, including psychological disorders, psychological dysfunction, mental health status, and sociodemographic and health-related variables. Methods We used individualized secondary data retrieved from the 2009 European Health Interview Survey (EHIS) for Spain to conduct a nationwide, descriptive, cross-sectional pharmacoepidemiology study on self-medication with analgesics among adults (individuals aged at least 16 years) of both genders living in Spain. A total of 7,606 interviews were analysed. The dichotomous dependent variables chosen were the answers “yes” or “no” to the question In the last 2 weeks have you taken the medicines not prescribed for you by a doctor for joint pain, headache, or low back pain?” Independent variables were sociodemographic, comorbidity, and healthcare resources. Results A total of 7,606 individuals reported pain in any of the locations (23.7%). In addition, analgesic consumption was self-prescribed in 23.7% (1,481) of these subjects. Forty percent (40.1%) of patients self-medicated for headache, 15.1% for low back pain, and 6.7% for joint pain. The variables significantly associated with a greater likelihood of self-medication of analgesics, independently of pain location were: age 16–39 years (2.36 < AOR < 3.68), higher educational level (1.80 < AOR <2.21), psychological disorders (1.56 < AOR < 1.98), and excellent/good perception of health status (1.74 < AOR < 2.68). In subjects suffering headache, self-prescription was associated with male gender (AOR 2.13) and absence of other comorbid condition (AOR 4.65). Conclusions This pharmacoepidemiology study constitutes an adequate approach to analgesic self-medication use in the Spanish population, based on a representative nationwide sample. Self-prescribed analgesic consumption was higher in young people with higher educational level, higher income, smoker, and with psychological disorders and with a good perception of their health status independently of the location of pain.
This article aims to present an artifact based on a design paradigm called "meta interface", an interface for interfaces, as a useful mean of improving existing interfaces for the individual needs of various classes of users. As a proof of concept of this paradigm, a case study was implemented. It consisted in the development, implementation and application of a “Meta-interface” with the aim to provide better access for users with low vision. The results confirmed evidence of the feasibility of this paradigm and also generated evidences for its effectiveness in improving the usability and accessibility of websites.
In the coal minnig zone in the department of Cesar (Colombia), the programs MM5, CALMET and CALPUFF were used to simulate the PM10 contribution of the mining projects PLJ, Norcarbón and the Hatillo, with the objective of compare the results of the model with the registers of monitoring of the zone and evaluate the dispersion model CALPUFF in two different topographic sites. Hatillo mining project is located a few kilometers from the village of La Loma, where the topographical features are plain; on the other side are the mining projects PLJ and Norcar-bón located in the low mountain zone of the Perijá, near to the La Jagua of Ibirico villaje. For the introduction of the emission variable in the CALPUFF model, was taken into account as provided in the study of the Monterrey Institute of Technology, (Huertas et al., 2008). Although the CALPUFF model is mostly recommended for long distances scenarios, there are exceptions for short distances scenarios where the model is reliable to measure the behavior of pollutants in the air. (EPA, 2005, 2008). In the present study were used these standards to evaluate the CALPUFF in the coal minning zone of department of Cesar, where the local weather is influenced by the mountain-valley relationship. The period of study was in a dry period. January (2008).
Open innovation model is the best choice for the firms that cannot afford R&D costs but intent to continue playing the innovation game. This model offers to any firm the possibility to have companies spread worldwide and in all research fields as partners in R&D. However, the possible partnership can be restricted to the manager's know-who. Patent documents can be the source of rich information about technical development and innovation from a huge amount of firms. Search through all these daily created documents is a cumbersome task that technology managers cannot afford. This paper aims to introduce an automated model to seek matching firms' R&D using data mining techniques applied into patent documents database. The methodology considers the search for patent documents from possible partners and these data treatment through the association technique among IPC fields. An evaluation system was implemented and a sample experiment was made. The results reached are patterns of technological knowledge interdependence that can be used to evaluate four possible types of partnership.
Prophylactic use of broad-spectrum insecticides is a common feature of broad-acre grains production systems around the world. Efforts to reduce pesticide use in these systems have the potential to deliver environmental benefits to large areas of agricultural land. However, research and extension initiatives aimed at decoupling pest management decisions from the simple act of applying a cheap insecticide have languished. This places farmers in a vulnerable position of high reliance on a few products that may lose their efficacy due to pests developing resistance, or be lost from use due to regulatory changes. The first step towards developing Integrated Pest Management (IPM) strategies involves an increased efficiency of pesticide inputs. Especially challenging is an understanding of when and where an insecticide application can be withheld without risking yield loss. Here, we quantify the effect of different pest management strategies on the abundance of pest and beneficial arthropods, crop damage and yield, across five sites that span the diversity of contexts in which grains crops are grown in southern Australia. Our results show that while greater insecticide use did reduce the abundance of many pests, this was not coupled with higher yields. Feeding damage by arthropod pests was seen in plots with lower insecticide use but this did not translate into yield losses. For canola, we found that plots that used insecticide seed treatments were most likely to deliver a yield benefit; however other insecticides appear to be unnecessary and economically costly. When considering wheat, none of the insecticide inputs provided an economically justifiable yield gain. These results indicate that there are opportunities for Australian grain growers to reduce insecticide inputs without risking yield loss in some seasons. We see this as the critical first step towards developing IPM practices that will be widely adopted across intensive production systems.
A sucessão familiar é um processo contínuo essencial à vida da empresa e se refere ao momento em que o gestor transfere o comando da organização ao seu sucessor. Desta forma, o presente estudo objetivou analisar os desafios que a terceira geração de uma indústria metalúrgica do Sul de Santa Catarina enfrenta em seu processo de sucessão familiar. Quanto aos fins a pesquisa foi classificada como descritiva e quanto aos meios de investigação caracterizou-se como uma pesquisa bibliográfica e um estudo de caso. A amostra envolvida foram 11 membros de uma empresa familiar, sendo um representante da segunda geração e os outros 10 membros da terceira geração, todos integrantes do quadro de colaboradores, selecionados pelo critério de conveniência. Foram analisados dados primários, coletados por meio de entrevistas em profundidade com ajuda de um roteiro estruturado. Verificou-se que a empresa ainda não está planejando a sua sucessão familiar para os próximos anos. Entre as dificuldades e desafios a serem enfrentados pela terceira geração destacam-se os conflitos de ego, a disputa pelo poder, a resistência dos sucedidos em passar o poder, o ciúme dos sucessores na escolha do próximo gestor e divergência de ideias.
The eastern barred bandicoot, Perameles gunnii, has undergone a dramatic decline in distribution and abundance on the mainland of Australia during the twentieth century. In 1988 a captive breeding program was initiated to reduce the chance of extinction. With the extinction of the last wild mainland population in the early 1990s, reintroductions from captive-bred P. gunnii have met limited success, and currently only two extant populations persist in predator proof enclosures in the State of Victoria. With ~20 years of breeding, there are concerns that the genetic diversity within the breeding program has declined and may inhibit current and future success of the program. We have used ten nuclear microsatellite loci and sequencing of two partial mitochondrial genes (cytochrome oxidase I and ATPase 6) to determine genetic diversity within current Victorian P. gunnii. These diversity estimates are compared with historic samples from the captive breeding program dating back to 1995, historic samples from the last wild mainland population found at Hamilton in 1992 and contemporary Tasmanian wild populations. Results indicate that the captive P. gunnii population in the State of Victoria has lost significant genetic diversity through time. Genetic diversity is also reduced in populations at Hamilton Community Parklands and Mount Rothwell. Samples from the last wild population at Hamilton collected in 1992, along with samples from Tasmanian P. gunnii, had significantly greater genetic diversity than contemporary mainland populations. The results are discussed with reference to management options for maintaining genetic diversity within Victorian P. gunnii, including crossing Victorian and Tasmanian P. gunnii to increase genetic diversity, adaptability and evolutionary potential.
Tolerance and compensatory ability after invertebrate damage are important components of plant defense and are affected by various endogenous and exogenous factors. Here, we examine the impact of feeding damage caused by different densities of the redlegged earth mite (Halotydeus destructor Tucker) on the performance and recovery of canola and wheat seedlings at different plant developmental stages, and when grown under three levels of moisture stress. Both canola and wheat were susceptible to feeding damage caused by H. destructor at early growth development stages (canola-cotyledon, first and second true leaf stage; wheat-GS10 and GS12), but tolerated damage at the later growth stages (canola-third true leaf stage; wheat-GS14). Wheat plants compensated completely for mite feeding damage, while canola plants showed partial compensation when feeding occurred at the cotyledon and first true leaf stages. Canola was susceptible to immediate feeding damage from H. destructor under all levels of moisture stress and did not compensate for this damage over time when grown in the unstressed and moderately stressed treatments. Under severe moisture stress conditions, plant performance traits and mite density often showed a nonlinear relationship, with growth initially increasing as mite density increased, but then decreasing markedly as densities exceeded 30 mites/100 cm(2). Wheat seedlings were susceptible to immediate feeding damage when grown in the unstressed and severe stress conditions, but were generally able to compensate for this damage regardless of moisture conditions. The implications of these results for the management of H. destructor are discussed.
Hallux valgus is perhaps one of the most challenging of all forefoot deformities facing the surgeon today. More than 150 procedures have been developed during the last century to correct hallux valgus deformity. The first metatarso-phalangeal joint supports 125 % of the weight of a walking person during the propulsive phase of gait, and must perform this function 1,000 of times a day for a lifetime.
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63 members
Washington Henrique Carvalho Almeida
  • Department of Software Engineering
Helda Oliveira Barros
  • Department of Design
Gustavo Alexandre
  • Department of Software Engineering
Tiago Barros
  • Department of Software Engineering
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Rua Bione 220, Recife, Estado de Pernambuco, Brazil
Website
www.cesar.org.br