Model-based reuse for crosscutting frameworks: assessing reuse and maintenance effort

Abstract Background Over the last years, a number of researchers have investigated how to improve the reuse of crosscutting concerns. New possibilities have emerged with the advent of aspect-oriented programming, and many frameworks were designed considering the abstractions provided by this new paradigm. We call this type of framework Crosscutting Frameworks (CF), as it usually encapsulates a generic and abstract design of one crosscutting concern. However, most of the proposed CFs employ white-box strategies in their reuse process, requiring two mainly technical skills: (i) knowing syntax details of the programming language employed to build the framework and (ii) being aware of the architectural details of the CF and its internal nomenclature. Also, another problem is that the reuse process can only be initiated as soon as the development process reaches the implementation phase, preventing it from starting earlier. Method In order to solve these problems, we present in this paper a model-based approach for reusing CFs which shields application engineers from technical details, letting him/her concentrate on what the framework really needs from the application under development. To support our approach, two models are proposed: the Reuse Requirements Model (RRM) and the Reuse Model (RM). The former must be used to describe the framework structure and the later is in charge of supporting the reuse process. As soon as the application engineer has filled in the RM, the reuse code can be automatically generated. Results We also present here the result of two comparative experiments using two versions of a Persistence CF: the original one, whose reuse process is based on writing code, and the new one, which is model-based. The first experiment evaluated the productivity during the reuse process, and the second one evaluated the effort of maintaining applications developed with both CF versions. The results show the improvement of 97% in the productivity; however little difference was perceived regarding the effort for maintaining the required application. Conclusion By using the approach herein presented, it was possible to conclude the following: (i) it is possible to automate the instantiation of CFs, and (ii) the productivity of developers are improved as long as they use a model-based instantiation approach.

A arquitetura patrimonial através dos jogos digitais

O presente artigo pretende ressaltar o potencial dos jogos digitais como instrumento de assimilação do conhecimento em arquitetura patrimonial, através da pesquisa Patrimônio arquitetônico, design e educação: desenvolvimento de Sistemas Interativos Lúdicos (jogos educativos em meio digital). Nesta pesquisa foram desenvolvidos jogos digitais a partir do levantamento das características arquitetônicas dos edifícios de relevância histórica e cultural da cidade de São Carlos. Através da interação e exploração da interface digital pelo usuário, a apropriação do conhecimento ocorre de uma forma lúdica e criativa. Por meio da manipulação desses jogos, os alunos, cidadãos e visitantes podem aproximar-se da educação patrimonial adquirindo consciência histórica e aprendendo a valorizar as origens da cidade e a arquitetura do município. Ressalta-se a importância das metodologias que permitem viabilizar o desenvolvimento dos jogos eletrônicos (desenho e linguagem de programação) e que se apresentam como importantes ferramentas de representação da arquitetura. Por fim, destaca-se a importância da educação patrimonial para a formação do cidadão e preservação do patrimônio cultural.

A linguagem de programação aliada ao desenho na criação de jogos digitais como instrumento de arquitetura patrimonial

This research studies the use of digital games as a playful tool approach of knowledge in architecture heritage. We emphasize the potential of digital games as a tool and importance of digital drawing combined with programming language, the means by which the making of the games became possible. The models developed are based on the properties of historical and cultural interest in the city of São Carlos, Brasil.

Construção e Evidências Psicométricas de uma Escala de Avaliação da Percepção Visual

Este estudo teve como objetivo construir e conhecer os parâmetros psicométricos de um instrumento para análise da percepção visual de adultos. Para a construção da escala participaram 295 adultos saudáveis, sem déficits cognitivos ou perceptivo-visuais. Nesta etapa foi formulada uma escala tetrafatorial constituída por 20 itens que avaliam quatro dimensões referentes à percepção visual: constância da forma, figurafundo, posição e relação espacial. Para obter evidências de validade foi utilizada uma amostra de 183 voluntários com boa saúde física e mental e acuidade visual normal ou corrigida. Os dados obtidos relatam a existência de concordância interjuízes, adequação semântica e significância no teste-reteste do instrumento. Os coeficientes de fidedignidade variaram de 0,84 a 0,93. Os quatro fatores esperados foram encontrados, cada um contendo 5 itens, e juntos explicaram 57,52% da variância do constructo. O instrumento apresentou parâmetros psicométricos adequados, o que pode justificar sua utilidade em pesquisas básicas e na prática clínica.

Cross-cultural adaptation and assessment of the reliability and validity of the Core Outcome Measures Index (COMI) for the Brazilian-Portuguese language

The use of patient-orientated questionnaires is of utmost importance in assessing the outcome of spine surgery. Standardisation, using a common set of outcome measures, is essential to aid comparisons across studies/in registries. The Core Outcome Measures Index (COMI) is a short, multidimensional outcome instrument validated for patients with spinal disorders. This study aimed to produce a Brazilian-Portuguese version of the COMI. A cross-cultural adaptation of the COMI into Brazilian-Portuguese was carried out using established guidelines. 104 outpatients with chronic LBP (> 3 months) were recruited from a Public Health Spine Medical Care Centre. They completed a questionnaire booklet containing the newly translated COMI, and other validated symptom-specific questionnaires: Oswestry Disability Index (ODI) and Roland Morris disability scale (RM), and a pain visual analogue scale. All patients completed a second questionnaire within 7-10 days to assess reproducibility. The COMI summary score displayed minimal floor and ceiling effects. On re-test, the responses for each individual domain of the COMI were within 1 category in 98% patients for the domain 'function', 96% for 'symptom-specific well-being', 97% for 'general quality of life', 99% for 'social disability' and 100% for 'work disability'. The intraclass correlation coefficients (ICC2,1) for COMI pain and COMI summary scores were 0.91-0.96, which compared favourably with the corresponding values for the RM (ICC, 0.99) and ODI (ICC, 0.98). The standard error of measurement for the COMI was 0.6, giving a "minimum detectable change" (MDC95%) of approximately 1.7 points i.e., the minimum change to be considered "real change" beyond measurement error. The COMI scores correlated as hypothesised (Rho, 0.4-0.8) with the other symptom-specific questionnaires. The reproducibility of the Brazilian-Portuguese version of the COMI was comparable to that of other language versions. The COMI scores correlated in the expected manner with existing but longer symptom-specific questionnaires suggesting good convergent validity for the COMI. The Brazilian-Portuguese COMI represents a valuable tool for Brazilian study-centres in future multicentre clinical studies and surgical registries.

DeCS terminology and the new rules on orthography of Portuguese language: guidelines for an update

PURPOSE: To indicate orthographic changes to be used as a basic reference for professionals, researchers, doctors, teachers, students and users, which are directly linked and performing activities in health services in general, aimed at implementing the correct orthography in recovery and production of their scientific studies. METHODS: For data collection, were shown some examples of terminology DeCS (Descriptors in Health Science) analyzed according to the current spelling and compared with the Orthographic Vocabulary of Portuguese Language (VOLP). RESULTS: It was select and listed examples of key words and/or terms related to Health Sciences, which was compared to the respective rules of the Orthographic Agreement of Portuguese Language, and divided into three items: graphical accentuation, the non use of dieresis and exceptions and, the use of hyphen. CONCLUSION: This study show some guidelines for the orthographic alterations of the terms used by scientific community, according the new orthographic rules, contributing for the efficiency in the description of the documents and consequently in their recovery.

LALP: a language to program custom FPGA-based acceleration engines

Field-Programmable Gate Arrays (FPGAs) are becoming increasingly important in embedded and high-performance computing systems. They allow performance levels close to the ones obtained with Application-Specific Integrated Circuits, while still keeping design and implementation flexibility. However, to efficiently program FPGAs, one needs the expertise of hardware developers in order to master hardware description languages (HDLs) such as VHDL or Verilog. Attempts to furnish a high-level compilation flow (e.g., from C programs) still have to address open issues before broader efficient results can be obtained. Bearing in mind an FPGA available resources, it has been developed LALP (Language for Aggressive Loop Pipelining), a novel language to program FPGA-based accelerators, and its compilation framework, including mapping capabilities. The main ideas behind LALP are to provide a higher abstraction level than HDLs, to exploit the intrinsic parallelism of hardware resources, and to allow the programmer to control execution stages whenever the compiler techniques are unable to generate efficient implementations. Those features are particularly useful to implement loop pipelining, a well regarded technique used to accelerate computations in several application domains. This paper describes LALP, and shows how it can be used to achieve high-performance computing solutions.

Language impairment in Huntington's disease

Language alterations in Huntington's disease (HD) are reported, but their nature and correlation with other cognitive impairments are still under investigation. This study aimed to characterize the language disturbances in HD and to correlate them to motor and cognitive aspects of the disease. We studied 23 HD patients and 23 controls, matched for age and schooling, using the Boston Diagnostic Aphasia Examination, Boston Naming Test, the Token Test, Animal fluency, Action fluency, FAS-COWA, the Symbol Digit Modalities Test, the Stroop Test and the Hooper Visual Organization Test (HVOT). HD patients performed poorer in verbal fluency (p<0.0001), oral comprehension (p<0.0001), repetition (p<0.0001), oral agility (p<0.0001), reading comprehension (p=0.034) and narrative writing (p<0.0001). There was a moderate correlation between the Expressive Component and Language Competency Indexes and the HVOT (r=0.519, p=0.011 and r=0.450, p=0.031, respectively). Language alterations in HD seem to reflect a derangement in both frontostriatal and frontotemporal regions.

Influência do tipo de estímulo visual na produção escrita de surdos sinalizadores sem queixas de alterações na escrita

OBJETIVO: Analisar a influência do tipo de estímulo visual sobre a produção escrita de surdos sinalizadores sem queixas de alterações na escrita. MÉTODOS: Participaram 14 surdos, de ambos os gêneros, com idades entre 8 e 13 anos, usuários da Língua Brasileira de Sinais, alunos da terceira e quarta séries do Ensino Fundamental de uma escola especial para surdos. Foram avaliados por meio de produções escritas baseadas em dois tipos de estímulos: uma sequência de quatro figuras e uma figura de ação. Cada produção foi pontuada de acordo com critérios adaptados da teoria das Competências Comunicativas (Genérica, Enciclopédica, e Linguística). RESULTADOS: Na análise da Competência Genérica não houve diferença entre as produções a partir da sequencia ou da figura de ação. Entretanto, notou-se que a figura de ação propiciou mais produções de gênero narrativo, enquanto as figuras em sequência eliciaram mais descrições. Quanto às Competências Enciclopédica e Linguística, ambos os estímulos visuais proporcionaram resultados semelhantes nas produções escritas. Tanto na Competência Enciclopédica quanto na Linguística, o desempenho dos surdos foi aquém do esperado para a faixa de escolaridade, demonstrando conhecimento parcial sobre a língua portuguesa escrita. No entanto, observou-se que as figuras sequenciadas propiciaram organização de ideias e coesão global um pouco mais elaboradas. CONCLUSÃO: Nenhum dos tipos de estímulo visual, seja figura de ação ou sequência de figuras, propicia melhores desempenhos de produção escrita de surdos sinalizadores sem queixas de alterações na escrita para a maior parte dos aspectos analisados.

Visual stimuli and written production of deaf signers

PURPOSE: To verify the interference of visual stimuli in written production of deaf signers with no complaints regarding reading and writing. METHODS: The research group consisted of 12 students with education between the 4th and 5th grade of elementary school, with severe or profound sensorineural hearing loss, users of LIBRAS and with alphabetical writing level. The evaluation was performed with pictures in a logical sequence and an action picture. The analysis used the communicative competence criteria. RESULTS: There were no differences in the writing production of the subjects for both stimuli. In all texts there was no title and punctuation, verbs were in the infinitive mode, there was lack of cohesive links and inclusion of created words. CONCLUSION: The different visual stimuli did not affect the production of texts.