Design Patterns Based Pre-processing of Source Code for Plagiarism Detection

Asadullah, Allahbaksh; Basavaraju, M.; Stern, Ilan; Bhat, Vasudev

doi:10.1109/apsec.2012.141

Cited by 9 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[43], who investigated the pyrolysis of Açaí seeds in nature at 350, 400, and 450 °C, 1.0 atmosphere, in pilot scale, showing an increase of biooil yield with temperature. Moreover, the results are in agreement with similar studies for the yield of bio-oil by the pyrolysis of biomass reported in the literature [44][45][46][47][48][49][50][51][52][53][54][55], whereas the yield of bio-oil increases between 200 and 450 °C [44][45][46][47][48][49][50][51][52][53][54][55]. The effect of process temperature on the composition of hydrocarbons and oxygenates in bio-oil obtained by pyrolysis of Açaí seeds (Euterpe Oleracea, Mart), activated with 2.0 M KOH solution, at 350, 400, and 450 °C, 1.0 atmosphere, in laboratory scale, is show in Figure 9.…”

Section: Characterization Of Bio-charsupporting

confidence: 92%

Improving the Bio-Oil Quality of Residual Biomass Pyrolysis by Chemical Activation: Effect of Alkalis and Acid Pre-treatment

Daniel¹,

Valois²,

Bremer³

et al. 2023

Preprint

View full text Add to dashboard Cite

This work investigated the effect of temperature and acid or alkalis chemical activation by pyrolysis of Açaí seeds (Euterpe Oleraceae, Mart.) on the yield of bio-oil, hydrocarbon content of bio-oil, and chemical composition of aqueous phase. The experiments were carried out at 350, 400, and 450 °C and 1.0 atmosphere, KOH and HCl activation, in laboratory scale. The acidity of bio-oils and aqueous phases determined by AOCS methods, while the chemical composition of bio-oils and aqueous phase by GC-MS and FT-IR. The bio-char characterized by XRD. For the activation with KOH, the XRD analysis identified the presence of Kalicinite (KHCO3), the dominant crystalline phase in bio-char, while an amorphous phase was identified in bio-chars for the activation with HCl. The yield of bio-oil, for the pyrolysis of Açaí seeds activated with KOH, varied between 3.19 and 6.79 (wt.%), showing a smooth exponential increase with temperature. The acidity of bio-oil varied between 12.3 and 257.6 mgKOH/g, decreasing exponentially with temperature, while the acidity of aqueous phase lies between 17.9 and 118.9 mgKOH/g, showing and exponential decay behavior with temperature, demonstrating that higher temperatures favor not only the yield of bio-oil but also bio-oils with lower acidity. For the pyrolysis experiments activated with HCl, the yield of bio-oil varied between 2.13 and 3.37 (wt.%), decreasing linearly with temperature, while that of gas phase varied between 17.91 and 37.94 (wt.%), increasing linearly with temperature. The acidity of bio-oil varied between 127.1 and 218.5 mgKOH/g, increasing with temperature, showing that higher temperatures did not favor the yield of bio-oil and bio-oils acidity. For the chemical activation with KOH, the FT-IR analysis of bio-oils identified the presence of chemical groups characteristics of hydrocarbons and oxygenates, while that of aqueous phase only groups characteristics of oxygenates. For the chemical activation with HCl, the FT-IR analysis of bio-oil and aqueous phases identified only the presence of groups characteristics of oxygenates. For the experiments with KOH activation, the GC-MS of bio-oil identified the presence of hydrocarbons (alkanes, alkenes, cycloalkanes, cycloalkenes, and aromatics) and oxygenates (carboxylic acids, phenols, ketones, and esters). The concentration of hydrocarbons varied between 10.19 to 25.71 (area.%), increasing with temperature, while that of oxygenates from 52.69 to 72.15 (area.%), decreasing with temperature. For the experiments with HCl activation, the GC-MS of bio-oil identified only the presence of oxygenates. Finally, it can be concluded that chemical activation of Açaí seeds with KOH favors the not only the yield of bio-oil but also the content of hydrocarbons while activation with HCl produced bio-oils with only oxygen compounds.

show abstract

Section: Characterization Of Bio-charsupporting

confidence: 92%

Improving the Bio-Oil Quality of Residual Biomass Pyrolysis by Chemical Activation: Effect of Alkalis and Acid Pre-treatment

Daniel¹,

Valois²,

Bremer³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Their study also reported an increase in bio-oil yield with temperature. Similar studies focusing on biomass pyrolysis have consistently reported an increase in bio-oil yield within the temperature range of 200 to 450 °C [59][60][61][62][63][64][65][66][67][68][69][70]. The data indicate that pyrolysis at 400 °C generates minimum char and maximum gas and water, suggesting that the pyrolysis mechanism is optimized by the reaction temperature of 400 °C when using chemical activation with KOH.…”

Section: Effect Of Process Temperaturesupporting

confidence: 58%

“…Afterwards, the dried seeds were ground using a laboratory knife cutting mill (TRAPP, Brazil, Model: TRF 600). Then, the dried and grinded Açaí seeds were sieved using a set of sieves of 28,35,48,60 Mesh in order to remove the excess fiber material, as well as to decrease the specific particle diameter. The drying, grinding and sieving of Açaí seeds in shown in Figure 3.…”

Section: Physical Pre-treatment Of Açaí Seeds (Euterpe Oleracea Mart)mentioning

confidence: 99%

Improving the Antioxidant Activity, Yield and Hydrocarbon Content of Bio-Oil from Açaí Seeds Pyrolysis by Chemical Activa-Tion: Effect of Temperature and Molarity

Valois,

Daniel,

Bezerra

et al. 2023

Preprint

View full text Add to dashboard Cite

This study explores the impact of temperature and molarity on the pyrolysis of Açaí seeds (Euterpe Oleraceae, Mart.) activated with KOH on the yield of bio-oil, hydrocarbon content of bio-oil, an-tioxidant activity of bio-oil and chemical composition of aqueous phase. The experiments were carried out at 350, 400, and 450 °C and 1.0 atmosphere, with 2.0 M KOH, and at 450 °C and 1.0 atmosphere, with 0.5 M, 1.0 M and 2.0 M KOH, in laboratory scale. The composition of bio-oils and aqueous phase determined by GC-MS, while the acid value, a physical-chemical property of fundamental importance in biofuels, of bio-oils and aqueous phases by AOCS methods. The an-tioxidant activity of bio-oils determined by the TEAC method. The solid phase (biochar) charac-terized by X-ray diffraction (XRD). The diffractograms identified the presence of Kalicinite (KHCO3) in biochar, and those higher temperatures favor the formation peaks of Kalicinite (KHCO3). The pyrolysis of Açaí seeds activated with KOH show bio-oil yields from 3.19 to 6.79 (wt.%), aqueous phase yields between 20.34 and 25.57 (wt.%), solid phase yields (coke) between 33.40 and 43.37 (wt.%), and gas yields from 31.85 to 34.45 (wt.%). The yield of bio-oil shows a smooth exponential increase with temperature. The acidity of bio-oil varied between 12.3 and 257.6 mgKOH/g, decreasing exponentially with temperature, while that of aqueous phase between 17.9 and 118.9 mgKOH/g, showing and exponential decay behavior with temperature, demonstrating that higher temperatures favor not only the yield of bio-oil but also bio-oils with lower acidity. For the experiments with KOH activation, the GC-MS of bio-oil identified the presence of hydro-carbons (alkanes, alkenes, cycloalkanes, cycloalkenes, and aromatics) and oxygenates (carboxylic acids, phenols, ketones, and esters). The concentration of hydrocarbons varied between 10.19 to 25.71 (area.%), increasing with temperature, while that of oxygenates from 52.69 to 72.15 (area.%), decreasing with temperature. For the experiments with constant temperature, the concentrations of hydrocarbons in bio-oil increase exponentially with molarity, while those of oxygenates de-crease exponentially, showing that higher molarities favor the formation of hydrocarbons in bio-oil. The antioxidant activity of bio-oils decreases with increasing temperature, as the content of phenolic compounds decreases, and decreases with increasing KOH molarity, as higher molarities favors the formation of hydrocarbons. Finally, it can be concluded that chemical activation of Açaí seeds with KOH favors the not only the yield of bio-oil but also the content of hydrocarbons. The study of process variables is of utmost importance in order to clearly assess reaction mechanisms, economic viability and design goals that could be derived from chemically activated biomass pyrolysis processes.

show abstract

“…Design patterns are recurring solutions to common programming problems that embody best practices and provide a structured approach to software development. In the design-based technique, the detection process involves retrieving the design patterns used in the source code and determining the similarity percentage based on these patterns [27].…”

Section: Design-based Techniquementioning

confidence: 99%

Automated Detection Approaches for Source Code Plagiarism in Students' Submissions

Eliwa

Essam

Mohamed

et al. 2023

Journal of Computing and Communication

View full text Add to dashboard Cite

Code plagiarism is a significant concern in software development, as it compromises the integrity of original work and can lead to ethical and legal consequences. The need for effective plagiarism detection techniques has grown in parallel with the rise in online coding resources and collaborative platforms. The paper analyses existing plagiarism detection tools, comparing their characteristics, functions, and development timelines. Emphasis is placed on essential factors such as additional case detection, direct display of matched pairings, and compatibility with multiple programming languages. By examining these features, educators and software developers can decide which tools best suit their needs. Additionally, the paper explores various plagiarism detection techniques, including attribute counting, content comparison, string tiling, and parse tree comparison. The advantages and limitations of each method are examined, underscoring the need for continuous improvement and innovation in the field. This paper presents the most widely available plagiarism detection tools that can be seamlessly integrated into learning management systems. In conclusion, the paper highlights critical areas for future research and development in plagiarism detection. These include the integration of plagiarism detection with live learning management systems to streamline the process for educators and students, the enhancement of usability and user experience in plagiarism detection tools to facilitate their adoption, the advancement of detection algorithms to improve accuracy, and the support for multi-language and crosslanguage comparisons to cater to diverse programming environments.

show abstract

Design Patterns Based Pre-processing of Source Code for Plagiarism Detection

Cited by 9 publications

References 14 publications

Improving the Bio-Oil Quality of Residual Biomass Pyrolysis by Chemical Activation: Effect of Alkalis and Acid Pre-treatment

Improving the Bio-Oil Quality of Residual Biomass Pyrolysis by Chemical Activation: Effect of Alkalis and Acid Pre-treatment

Improving the Antioxidant Activity, Yield and Hydrocarbon Content of Bio-Oil from Açaí Seeds Pyrolysis by Chemical Activa-Tion: Effect of Temperature and Molarity

Automated Detection Approaches for Source Code Plagiarism in Students' Submissions

Contact Info

Product

Resources

About