M. P. Sáez-Pérez, Alberto Martínez-Ramírez, Orge Alberto DuránSuárez, M. A. Villegas-Broncano
By using silicate inorganic binders and glass waste it is possible to mould technical and artistic elements which later can be compacted by means of low temperature, and subsequently apply the sintering through high-temperature processing, which is generally lower than current melting glass processes, close to 1250 °C. The experimental phase established thermal ranges from 600°C to 750°C, a fact that allows for an effective sintering temperature (of around 650°C/18 hours). The mixtures and proportions for this experiment were fixed including ethyl silicate as a fluidizer in mixtures,as well as the size of glass grains.The results indicate good compaction of the samples after the initial phase (80°C/24h), allowing proper handling without alterations in samples edges.During heating treatment, mechanical resistance increases gradually (600-750°C), although the volume of porosity was inversely proportional. According to the matrix vs grain size relationship, the partial fusion of both materials is evident in the rounding of the glass grains as well as the resin bonds joined between them. The resins appeared in a homogenous fashion, covering and gluing the grains, a development which improves the joining of sintered samples. Samples with a mixture of sodium silicate and ethyl silicate resins experienced less melting between grains due to a lower volume of fluxing elements, which means a lower percentage volume of sodium (Na). This study concludes that a sintering process for new vitreous composites could be carried out between 650°C and 700°C, offering the opportunity for a substantial reduction in the amount of energy required to produce industrial glass. Keywords: Water-glass, glass recycling, low temperature
{"title":"Low Temperature Glass Sintering Based on Silico Sodium Resins","authors":"M. P. Sáez-Pérez, Alberto Martínez-Ramírez, Orge Alberto DuránSuárez, M. A. Villegas-Broncano","doi":"10.18502/keg.v5i4.6795","DOIUrl":"https://doi.org/10.18502/keg.v5i4.6795","url":null,"abstract":"By using silicate inorganic binders and glass waste it is possible to mould technical and artistic elements which later can be compacted by means of low temperature, and subsequently apply the sintering through high-temperature processing, which is generally lower than current melting glass processes, close to 1250 °C. The experimental phase established thermal ranges from 600°C to 750°C, a fact that allows for an effective sintering temperature (of around 650°C/18 hours). The mixtures and proportions for this experiment were fixed including ethyl silicate as a fluidizer in mixtures,as well as the size of glass grains.The results indicate good compaction of the samples after the initial phase (80°C/24h), allowing proper handling without alterations in samples edges.During heating treatment, mechanical resistance increases gradually (600-750°C), although the volume of porosity was inversely proportional. According to the matrix vs grain size relationship, the partial fusion of both materials is evident in the rounding of the glass grains as well as the resin bonds joined between them. The resins appeared in a homogenous fashion, covering and gluing the grains, a development which improves the joining of sintered samples. Samples with a mixture of sodium silicate and ethyl silicate resins experienced less melting between grains due to a lower volume of fluxing elements, which means a lower percentage volume of sodium (Na). This study concludes that a sintering process for new vitreous composites could be carried out between 650°C and 700°C, offering the opportunity for a substantial reduction in the amount of energy required to produce industrial glass. \u0000Keywords: Water-glass, glass recycling, low temperature","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116893227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the utilization of mine tailings, the by-product originating from metal- and mineral-based ore mining, as a new cement replacement material. This paper is based on the chemical and physical characteristics of 13 mine tailing samples. In this study, Chemometrics were applied to consider all parameters simultaneously and obtain a thorough screening of potential relations in the large data set. Hierarchical Cluster Analysis (HCA) groups samples according to (dis)similar features and Principal Component Analysis (PCA) visualizes predominating variables and relations to samples. The application of HCA highlighted a clear grouping between mine tailings according to characteristics. Meanwhile, PCA identified the predominant chemical and physical characteristics in the mine tailing samples. Chemometrics therefore provided a thorough overview of mine tailings’ physical and chemical characteristics. Keywords: mine tailings, chemometrics, cement replacement
{"title":"Applying Chemometrics to Evaluate Mine Tailings’ Potential As Partial Cement Replacement","authors":"Anne Mette T. Simonsen, K. B. Pedersen, P. Jensen","doi":"10.18502/keg.v5i4.6808","DOIUrl":"https://doi.org/10.18502/keg.v5i4.6808","url":null,"abstract":"This study investigates the utilization of mine tailings, the by-product originating from metal- and mineral-based ore mining, as a new cement replacement material. This paper is based on the chemical and physical characteristics of 13 mine tailing samples. In this study, Chemometrics were applied to consider all parameters simultaneously and obtain a thorough screening of potential relations in the large data set. Hierarchical Cluster Analysis (HCA) groups samples according to (dis)similar features and Principal Component Analysis (PCA) visualizes predominating variables and relations to samples. The application of HCA highlighted a clear grouping between mine tailings according to characteristics. Meanwhile, PCA identified the predominant chemical and physical characteristics in the mine tailing samples. Chemometrics therefore provided a thorough overview of mine tailings’ physical and chemical characteristics. \u0000Keywords: mine tailings, chemometrics, cement replacement","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117306283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Sztubecka, M. Skiba, M. Mrówczyńska, Michael Mathias
The research subject presented in the paper is acoustic perception, the perception of a sound landscape by a human. The paper aim was formulated - knowing the sources of noise based on the subjective assessment of recipients allows for sustainable management of green areas (city parks). The need to shape a harmonious landscape may contribute to finding a new function and attractive form for the studied areas. Research carried out for selected city parks in Bydgoszcz (Poland) concerns the registration of responses of people assessing the sound landscape (subjective approach). Completed studies allow ”translating” subjective assessments into meaningful values using fuzzy cognitive maps. The scenarios completed show the possibility of using tools supporting the decision-making process in urban planning of city parks in relation to existing acoustic conditions. Keywords: Noise, Soundscape, Green areas, Urban planning, Environment
{"title":"Noise As a Factor of Green Areas Soundscape Creation","authors":"M. Sztubecka, M. Skiba, M. Mrówczyńska, Michael Mathias","doi":"10.3390/su12030999","DOIUrl":"https://doi.org/10.3390/su12030999","url":null,"abstract":"The research subject presented in the paper is acoustic perception, the perception of a sound landscape by a human. The paper aim was formulated - knowing the sources of noise based on the subjective assessment of recipients allows for sustainable management of green areas (city parks). The need to shape a harmonious landscape may contribute to finding a new function and attractive form for the studied areas. Research carried out for selected city parks in Bydgoszcz (Poland) concerns the registration of responses of people assessing the sound landscape (subjective approach). Completed studies allow ”translating” subjective assessments into meaningful values using fuzzy cognitive maps. The scenarios completed show the possibility of using tools supporting the decision-making process in urban planning of city parks in relation to existing acoustic conditions. \u0000Keywords: Noise, Soundscape, Green areas, Urban planning, Environment","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129193392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Hidalgo, Jonny Guaiña, V. Ramos, Piedad Yumiseba, C. Gutiérrez
This work shows the development of a computerized system for registering emergency patients at Alfonso Villagómez Hospital, using the DSDM(Dynamic Systems Development Method) agile development methodology in which 150 requirements expressed in UML(Unified Modeling language) diagrams were obtained for greater understanding; The PyCharm integrated development environment, the Django frameworks under the language Python and Bootstrap were used for the design of the templates and database management system PostgreSQL. The architecture applied was MTV(Model Template View) and once the system was implemented, the usability of software was evaluated according to the ISO/IEC 9126 standard, using the survey called USE (utility, satisfaction and ease of use), for the hypothesis the test was applied Chi square and it is concluded that the computer system is useful and meets the needs of users. Resumen. Este trabajo muestra el desarrollo de un sistema informático del registro de pacientes de emergencia del Hospital Alfonso Villagómez, utilizando la metodología de desarrollo ágil DSDM(Metodología de Desarrollo de Sistemas Dinámicos) en el cual se obtuvieron 150 requerimientos expresados en diagramas UML(lenguaje unificado de modelado) para mayor comprensión; para el desarrollo del sistema se utilizó el entorno de desarrollo integrado PyCharm, los frameworks Django bajo el lenguaje Python y Bootstrap para el diseño de plantillas y como gestor de base de datos PostgreSQL. La arquitectura aplicada fue MTV(Modelo, Vista, Plantilla) y una vez implantado el sistema se evaluó la usabilidad de software según el estándar ISO/IEC 9126, mediante la encuesta denominada USE (utilidad, satisfacción y facilidad de uso), para la prueba de la hipótesis se aplicó la prueba de chi cuadrado y se concluye que el sistema informático es útil y satisface las necesidades de los usuarios.
这项工作展示了在Alfonso Villagómez医院使用DSDM(动态系统开发方法)敏捷开发方法为登记急诊患者开发的计算机化系统，其中获得了用UML(统一建模语言)图表示的150个需求，以便更好地理解;使用PyCharm集成开发环境、Python语言下的Django框架和Bootstrap对模板和数据库管理系统PostgreSQL进行了设计。应用的体系结构是MTV(模型模板视图)，一旦系统被实现，软件的可用性根据ISO/IEC 9126标准进行评估，使用名为USE(效用，满意度和易用性)的调查，对于假设测试应用卡方，得出结论，计算机系统是有用的，满足用户的需求。Resumen。Este trabajo el desarrollo de sistema informático del registro de急诊医院阿方索Villagómez，利用andandla metodología de desarrollo ágil DSDM(Metodología de desarrollo de Sistemas Dinámicos) en el cuel cutuvieron 150要求表达和图表UML(lenguaje univerado de modelado) para mayor comprensión;链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接:链接链接La arquitectura applicicada fute MTV(Modelo, Vista, Plantilla)通过una vez inplantado el sistema evaluó La usabilidad de software según el estándar ISO/IEC 9126, mediante La encuesta denominada USE (utilitdad, satisfacción y facilidad de uso)， para La prueba de La hipótesis se aplicó La prueba de chi cuadrado y se concluye que el sistema informático es útil通过满足los usuarios的需求。
{"title":"Application of the DSDM methodology and the Django framework for the patient registration system of the Alfonso Villagómez pediatric hospital emergency service","authors":"B. Hidalgo, Jonny Guaiña, V. Ramos, Piedad Yumiseba, C. Gutiérrez","doi":"10.18502/keg.v5i1.5921","DOIUrl":"https://doi.org/10.18502/keg.v5i1.5921","url":null,"abstract":"This work shows the development of a computerized system for registering emergency patients at Alfonso Villagómez Hospital, using the DSDM(Dynamic Systems Development Method) agile development methodology in which 150 requirements expressed in UML(Unified Modeling language) diagrams were obtained for greater understanding; The PyCharm integrated development environment, the Django frameworks under the language Python and Bootstrap were used for the design of the templates and database management system PostgreSQL. The architecture applied was MTV(Model Template View) and once the system was implemented, the usability of software was evaluated according to the ISO/IEC 9126 standard, using the survey called USE (utility, satisfaction and ease of use), for the hypothesis the test was applied Chi square and it is concluded that the computer system is useful and meets the needs of users. \u0000Resumen. Este trabajo muestra el desarrollo de un sistema informático del registro de pacientes de emergencia del Hospital Alfonso Villagómez, utilizando la metodología de desarrollo ágil DSDM(Metodología de Desarrollo de Sistemas Dinámicos) en el cual se obtuvieron 150 requerimientos expresados en diagramas UML(lenguaje unificado de modelado) para mayor comprensión; para el desarrollo del sistema se utilizó el entorno de desarrollo integrado PyCharm, los frameworks Django bajo el lenguaje Python y Bootstrap para el diseño de plantillas y como gestor de base de datos PostgreSQL. La arquitectura aplicada fue MTV(Modelo, Vista, Plantilla) y una vez implantado el sistema se evaluó la usabilidad de software según el estándar ISO/IEC 9126, mediante la encuesta denominada USE (utilidad, satisfacción y facilidad de uso), para la prueba de la hipótesis se aplicó la prueba de chi cuadrado y se concluye que el sistema informático es útil y satisface las necesidades de los usuarios.","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130018540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of Carbon Stock Potential and Carbon Absorption on Pamonean Land of Mentawai Community at Siberut Island","authors":"C. ., Gusmardi Indra, Erizal Muchtar, N. ., M. .","doi":"10.18502/KEG.V1I2.4431","DOIUrl":"https://doi.org/10.18502/KEG.V1I2.4431","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122591384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Febriani, Nurul H. Ulwiyyah, Nurdin Saidi, T. Iqbalsyah
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{"title":"Screening and Production of Lipase from a Thermo-halophilic Bacterial Isolate of Pria Laot Sabang 80 Isolated from Under Water Hot Spring","authors":"Febriani, Nurul H. Ulwiyyah, Nurdin Saidi, T. Iqbalsyah","doi":"10.18502/KEG.V1I2.4436","DOIUrl":"https://doi.org/10.18502/KEG.V1I2.4436","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123897273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Syukri, D. M. Islami, Yoni Saputra, Salmi Seprianti, S. Wahyuni, F. Ramadhani, S. Arief, O. N. Tetra, Y. E. Putri, Y. Rilda
.
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{"title":"Natural Zeolits and Its Modifications with Protons and Copper As the Catalyst for Esterification of Ethanol with Acetic Acid","authors":"Syukri, D. M. Islami, Yoni Saputra, Salmi Seprianti, S. Wahyuni, F. Ramadhani, S. Arief, O. N. Tetra, Y. E. Putri, Y. Rilda","doi":"10.18502/KEG.V1I2.4454","DOIUrl":"https://doi.org/10.18502/KEG.V1I2.4454","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126386694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Azadi, M. Syafwan, A. Nazra, Riza Azfa, Zita Putri Netrisa
.
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{"title":"Variational Approximations for Intersite Soliton in a Ablowitz-Ladik-Cubic Discrete Nonlinear Schrödinger Equation","authors":"A. Azadi, M. Syafwan, A. Nazra, Riza Azfa, Zita Putri Netrisa","doi":"10.18502/KEG.V1I2.4430","DOIUrl":"https://doi.org/10.18502/KEG.V1I2.4430","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116399433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Microfibrillation of Coir Using High Speed Blender to Improvement of Tensile Behavior of Coir Reinforced Epoxy Composites","authors":"I. Mawardi, Jufriadi ., Hanif .","doi":"10.18502/KEG.V1I2.4441","DOIUrl":"https://doi.org/10.18502/KEG.V1I2.4441","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120807229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Numerical Study of Bird Flu Infection Process Within a Poultry Farm with Age Structured Model","authors":"T. D. Nova, A. R. Putri, Masaji Watanabe","doi":"10.18502/KEG.V1I2.4426","DOIUrl":"https://doi.org/10.18502/KEG.V1I2.4426","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":106635,"journal":{"name":"KnE Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132391839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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