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RISS 인기검색어
- 검색키워드
- 저자 : Thiago Viana (검색결과 5 건)
- 무료
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- 유료
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A Catalog of Bad Smells in Design-by-Contract Methodologies with Java Modeling Language
Thiago Viana 한국정보과학회 2013 Journal of Computing Science and Engineering Vol.7 No.4
Bad smells are usually related to program source code, arising from bad design and programming practices. Refactoring activities are often motivated by the detection of bad smells. With the increasing adoption of Design-by-Contract (DBC) methodologies in formal software development, evidence of bad design practices can similarly be found in programs that combine actual production code with interface contracts. These contracts can be written in languages, such as the Java Modeling Language (JML), an extension to the Java syntax. This paper presents a catalog of bad smells that appear during DBC practice, considering JML as the language for specifying contracts. These smells are described over JML constructs, although several can appear in other DBC languages. The catalog contains 6 DBC smells. We evaluate the recurrence of DBC smells in two ways: first by describing a small study with graduate student projects, and second by counting occurrences of smells in contracts from the JML models application programming interface (API). This API contains classes with more than 1,600 lines in contracts. Along with the documented smells, suggestions are provided for minimizing the impact or even removing a bad smell. It is believed that initiatives towards the cataloging of bad smells are useful for establishing good design practices in DBC.
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A Catalog of Bad Smells in Design-by-Contract Methodologies with Java Modeling Language
Viana, Thiago Korean Institute of Information Scientists and Eng 2013 Journal of Computing Science and Engineering Vol.7 No.4
Bad smells are usually related to program source code, arising from bad design and programming practices. Refactoring activities are often motivated by the detection of bad smells. With the increasing adoption of Design-by-Contract (DBC) methodologies in formal software development, evidence of bad design practices can similarly be found in programs that combine actual production code with interface contracts. These contracts can be written in languages, such as the Java Modeling Language (JML), an extension to the Java syntax. This paper presents a catalog of bad smells that appear during DBC practice, considering JML as the language for specifying contracts. These smells are described over JML constructs, although several can appear in other DBC languages. The catalog contains 6 DBC smells. We evaluate the recurrence of DBC smells in two ways: first by describing a small study with graduate student projects, and second by counting occurrences of smells in contracts from the JML models application programming interface (API). This API contains classes with more than 1,600 lines in contracts. Along with the documented smells, suggestions are provided for minimizing the impact or even removing a bad smell. It is believed that initiatives towards the cataloging of bad smells are useful for establishing good design practices in DBC.
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Anne Beatriz Figueira Câmara,Rafael Viana Sales,Carlos Vital dos Santos Júnior,Miguel Angelo Fonseca de Souza,Clenildo de Longe,Thiago Medeiros Chianca,Rosangela Dala Possa,Luiz Carlos Bertolino,Lucie 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.7
Palygorskite clay mineral (Pal) was employed in the removal of Congo red (CR) and methylene blue (MB)dyes pollutants in aqueous effluents by the adsorption process. The materials, Pal raw and acid Pal (Apal), were characterizedby SEM, EDX, XRD, XFR, FTIR, XPS and Raman spectroscopy techniques that evidenced the main active sitesof clay mineral. Characterization data indicated that acid treatment caused a leaching process of metallic cations on thePal surface. As result, the maximum adsorption capacity was increased from 11.3 to 120.5mg·g1 and from 2.7 to238.1mg·g1 for MB and CR dyes, respectively. The regeneration result after five cycles was of 75% recovered to MBadsorption into Apal. Semi-empirical quantum mechanical (SQM) calculations were performed to identify the mechanismof interaction between the Pal surface and dyes. High correlation (R2>0.99) was observed for the experimentaldata using the pseudo-second-order kinetic model, that were confirmed by computed enthalpy values (298.7 to 84.5 kJ·mol1), suggesting a chemisorption process as the determining step. Furthermore, the experimental and computationalresults indicated that the Pal also could work removing efficiently two dyes simultaneously with an adsorptioncapacity of 37.2 and 40.4mg·g1 for MB and CR, respectively.
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Souza, Carolina de Santana,Procopio, Thamara Figueiredo,Belmonte, Bernardo do Rego,Paiva, Patricia Maria Guedes,de Albuquerque, Lidiane Pereira,Pontual, Emmanuel Viana,Napoleao, Thiago Henrique The Korean Society for Applied Biological Chemistr 2018 Applied Biological Chemistry (Appl Biol Chem) Vol.61 No.3
In this study, the effects of Opuntia ficus-indica lectin (OfiL) on the survival and nutritional parameters of Sitophilus zeamais (maize weevil) adults were evaluated. OfiL was incorporated into the artificial diets at concentrations of 15, 60, and 95 mg/g (mg of lectin per g of wheat flour). Mortality was evaluated after 7 and 15 days, and the amount of food ingested and the weight of the insects were determined on the 7th day. In addition, the in vitro effects of OfiL on the gut enzymes of the insect were investigated. The ingestion of OfiL did not show any significant difference in the mortality rates compared to control. The relative consumption rate was also similar to that of the control, and no deterrent effect was detected. However, the values of the relative biomass variation and the efficiency of ingested food conversion were negative in the treatments at 60 and 95 mg/g, showing that lectin ingestion resulted in weight loss. OfiL exhibited a stimulatory effect on the protease activity from S. zeamais gut extract, which may cause uncontrolled hydrolysis of proteins in the digestive tract. This lectin did not promote significant alteration in the amylase activity. In conclusion, OfiL was able to exert anti-nutritional effects without causing a deterrent effect.
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Carolina de Santana Souza,Thamara Figueiredo Procopio,Bernardo do Rego Belmonte,Patrıcia Maria Guedes Paiva,Lidiane Pereira de Albuquerque,Emmanuel Viana Pontual,Thiago Henrique Napoleao 한국응용생명화학회 2018 Applied Biological Chemistry (Appl Biol Chem) Vol.61 No.3
In this study, the effects of Opuntia ficus-indica lectin (OfiL) on the survival and nutritional parameters of Sitophilus zeamais (maize weevil) adults were evaluated. OfiL was incorporated into the artificial diets at concentrations of 15, 60, and 95 mg/g (mg of lectin per g of wheat flour). Mortality was evaluated after 7 and 15 days, and the amount of food ingested and the weight of the insects were determined on the 7th day. In addition, the in vitro effects of OfiL on the gut enzymes of the insect were investigated. The ingestion of OfiL did not show any significant difference in the mortality rates compared to control. The relative consumption rate was also similar to that of the control, and no deterrent effect was detected. However, the values of the relative biomass variation and the efficiency of ingested food conversion were negative in the treatments at 60 and 95 mg/g, showing that lectin ingestion resulted in weight loss. OfiL exhibited a stimulatory effect on the protease activity from S. zeamais gut extract, which may cause uncontrolled hydrolysis of proteins in the digestive tract. This lectin did not promote significant alteration in the amylase activity. In conclusion, OfiL was able to exert anti-nutritional effects without causing a deterrent effect.
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