This study optimizes the effect of injection parameters such as melting temperature, injection pressure, injection speed, holding pressure, mold temperature, and cooling time on isotactic polypropylene (iPP) moldings. The 2k factorial design is used to employ for planning the experiment to study the tensile properties of iPP specimens, such as ultimate tensile strength, and strain at yield. The effect of the parameters on the mechanical properties is determined by using the variance analysis. The four factors as melting temperature, holding pressure, mold temperature, and cooling time were the results obtained by screening with a full factorial design, which is a significant parameter. The optimum condition for the highest tensile properties of iPP was obtained when setting injection molding conditions with melting temperature, mold temperature, holding pressure, and cooling time remained at 230 °C, 60 °C, 80 bar, and 20 sec. Base on ANOVA, empirical equations are proposed to relationship for predicting the ultimate tensile strength and strain at yield. The changes in the microstructure of the injection molding specimens are discussed in terms of crystallinity degree. All of this was supported by a polarized optical microscopy (POM) and one-dimension wide-angle X-ray diffraction (1D-WAXD) measurements.
{"title":"Influence of injection process parameters on mechanical properties of isotactic polypropylene: A design of experiments approach","authors":"N. Phupewkeaw, Pattarawit Srimuang","doi":"10.1063/5.0063790","DOIUrl":"https://doi.org/10.1063/5.0063790","url":null,"abstract":"This study optimizes the effect of injection parameters such as melting temperature, injection pressure, injection speed, holding pressure, mold temperature, and cooling time on isotactic polypropylene (iPP) moldings. The 2k factorial design is used to employ for planning the experiment to study the tensile properties of iPP specimens, such as ultimate tensile strength, and strain at yield. The effect of the parameters on the mechanical properties is determined by using the variance analysis. The four factors as melting temperature, holding pressure, mold temperature, and cooling time were the results obtained by screening with a full factorial design, which is a significant parameter. The optimum condition for the highest tensile properties of iPP was obtained when setting injection molding conditions with melting temperature, mold temperature, holding pressure, and cooling time remained at 230 °C, 60 °C, 80 bar, and 20 sec. Base on ANOVA, empirical equations are proposed to relationship for predicting the ultimate tensile strength and strain at yield. The changes in the microstructure of the injection molding specimens are discussed in terms of crystallinity degree. All of this was supported by a polarized optical microscopy (POM) and one-dimension wide-angle X-ray diffraction (1D-WAXD) measurements.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121135395","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}
Concrete has been used as the primary material for civil engineering infrastructure systems. RC structures in marine environments are at risk of steel corrosion due to the penetration of chloride ions. The concrete used blast furnace slag (from now on referred to as “BFS”) to improve durability and water tightness, which development of porosity properties is essential and has low initial strength and susceptible to environmental effects. The use of industrial by-product materials, such as BFS, which aims to improve the pore size distribution of cement, has become a theme of this study when used as a sufficient amount of replacement Blaine value of BFS are experimentally investigated. The Mercury injection porosimetry (from now on referred to as “MIP”) technique was used to examine the effect of water to cement ratio (w/c) on the pore structure of manufactured BFS were different Blaine value in this study. The pore size distribution of cement- based materials has been reviewed, with test results in this investigation also indicate that the threshold radius increases with different curing conditions and BFS replacement percentages. Porosity and mean diameter were considered, which clearly explains the relationship between pore structure and curing condition, as shown in the result. The intruded pore volume per volume of paste in the mortar increases with increasing replacement level concentration. The strongly suggested that pores distribution be disturbed by this testing might not be only pores in the paste alone although could include water ratio, fissures, and bond cracks at the aggregate-paste interface.
{"title":"Influence of both Blaine value and curing condition on pore sizes distribution of mortar with using blast furnace slag","authors":"P. Subpa-asa, N. Nito, S. Fujiwara, S. Date","doi":"10.1063/5.0065955","DOIUrl":"https://doi.org/10.1063/5.0065955","url":null,"abstract":"Concrete has been used as the primary material for civil engineering infrastructure systems. RC structures in marine environments are at risk of steel corrosion due to the penetration of chloride ions. The concrete used blast furnace slag (from now on referred to as “BFS”) to improve durability and water tightness, which development of porosity properties is essential and has low initial strength and susceptible to environmental effects. The use of industrial by-product materials, such as BFS, which aims to improve the pore size distribution of cement, has become a theme of this study when used as a sufficient amount of replacement Blaine value of BFS are experimentally investigated. The Mercury injection porosimetry (from now on referred to as “MIP”) technique was used to examine the effect of water to cement ratio (w/c) on the pore structure of manufactured BFS were different Blaine value in this study. The pore size distribution of cement- based materials has been reviewed, with test results in this investigation also indicate that the threshold radius increases with different curing conditions and BFS replacement percentages. Porosity and mean diameter were considered, which clearly explains the relationship between pore structure and curing condition, as shown in the result. The intruded pore volume per volume of paste in the mortar increases with increasing replacement level concentration. The strongly suggested that pores distribution be disturbed by this testing might not be only pores in the paste alone although could include water ratio, fissures, and bond cracks at the aggregate-paste interface.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"81 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134219733","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}
W. Wattanutchariya, Phisit Seesuriyachan, Bussaba Arree, Araya Raiwa, Kochakon Moonsub, Jaturapit Phongsupa
Nowadays, Thai consumers are more alert and caring about their hair health. As a result, products that care and promote hair and scalp are in high demand. One of the most interesting products is the hair care line. One of the important substances that help in reducing hair loss and promoting hair regrowth is coffee extract. This research focuses on value creation of coffee products from the northern Thailand into a cosmeceutical product. Variety of coffee by-product are studied in terms of Caffeine content and antioxidant activity, which benefit the hair growth and scalp care function. In addition, product development technique has been implemented to develop the hair serum prototype that comply with customer’s requirement. The results show that the active ingredient can be extracted from a variety part of coffee by- product. The coffee bean extraction yields the highest amount of Caffeine, while the red coffee fruit extraction yields the highest amount of antioxidant activity. However, when compare in terms of performance/cost of material, the extraction of fall grade cherry coffee is the most cost effective source for both active ingredients for this serum development. In the meantime, the market demand was collected based on 252 sample size using online questionnaires. The results show that the sample group gave importance to the factor of no irritation to the scalp as the first concern, while the safety issue as the second and the properties of the product ranked the third on customer’s needs. Then the prototype was developed and verified in terms of active ingredient concentration and product stability. Furthermore, product was validated in terms of hair growth and skin irritation. Finally, the prototype was analyzed with 3 focus groups: (1) hair loss prevention group (2) hair loss solution group and (3) beauty service provider/ product supplier. According to these focus group evaluation, it shows that all three test participants were satisfied with prototype’s sensory. Some issues that could be improved are viscosity and stickiness. Additionally, marketing mix was evaluated on these group to estimate potential product-package design, selling price and place, as well as the promotion technique.
{"title":"Development of hair serum from local coffee by-product","authors":"W. Wattanutchariya, Phisit Seesuriyachan, Bussaba Arree, Araya Raiwa, Kochakon Moonsub, Jaturapit Phongsupa","doi":"10.1063/5.0063780","DOIUrl":"https://doi.org/10.1063/5.0063780","url":null,"abstract":"Nowadays, Thai consumers are more alert and caring about their hair health. As a result, products that care and promote hair and scalp are in high demand. One of the most interesting products is the hair care line. One of the important substances that help in reducing hair loss and promoting hair regrowth is coffee extract. This research focuses on value creation of coffee products from the northern Thailand into a cosmeceutical product. Variety of coffee by-product are studied in terms of Caffeine content and antioxidant activity, which benefit the hair growth and scalp care function. In addition, product development technique has been implemented to develop the hair serum prototype that comply with customer’s requirement. The results show that the active ingredient can be extracted from a variety part of coffee by- product. The coffee bean extraction yields the highest amount of Caffeine, while the red coffee fruit extraction yields the highest amount of antioxidant activity. However, when compare in terms of performance/cost of material, the extraction of fall grade cherry coffee is the most cost effective source for both active ingredients for this serum development. In the meantime, the market demand was collected based on 252 sample size using online questionnaires. The results show that the sample group gave importance to the factor of no irritation to the scalp as the first concern, while the safety issue as the second and the properties of the product ranked the third on customer’s needs. Then the prototype was developed and verified in terms of active ingredient concentration and product stability. Furthermore, product was validated in terms of hair growth and skin irritation. Finally, the prototype was analyzed with 3 focus groups: (1) hair loss prevention group (2) hair loss solution group and (3) beauty service provider/ product supplier. According to these focus group evaluation, it shows that all three test participants were satisfied with prototype’s sensory. Some issues that could be improved are viscosity and stickiness. Additionally, marketing mix was evaluated on these group to estimate potential product-package design, selling price and place, as well as the promotion technique.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130538512","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}
U. Wangrakdiskul, Thongrob Sappuang, Athiwat Khumsupa
Korat stirred-noodle industry is one of the community businesses producing a signature provincial food of Nakhon Ratchasima Province, Thailand. Presently, there are many SME factories producing Thai instant noodles products which are called Mee Korat. However, their production process is still dependent on the labor force and needs improvement. Although, the substantial effect of Coronavirus pandemic of worldwide, food products demand is adversely increased. The studied company faces the problem of low capacity. This leads to unachieved customer demand which higher than 100% of current production. Due to expanding the market of the company to neighboring countries, such as Lao, Myanmar, improving the production process is crucial. Seven wastes technique has been applied for analyzing and improving productivity. Adjusting the current tooling i.e., spatula turner for stirring sauce slurry at mixing sauce station, and installing portable conveyor for reducing movement of workers at packing station are proposed. The results of these improvements can reduce the number of workforces and laborers’ fatigue. In addition, production and productivity can be increased and respond to the high demand of customers.
{"title":"Enhancement competitive capabilities of the Korat stirred-noodle industry by improving productivity","authors":"U. Wangrakdiskul, Thongrob Sappuang, Athiwat Khumsupa","doi":"10.1063/5.0063783","DOIUrl":"https://doi.org/10.1063/5.0063783","url":null,"abstract":"Korat stirred-noodle industry is one of the community businesses producing a signature provincial food of Nakhon Ratchasima Province, Thailand. Presently, there are many SME factories producing Thai instant noodles products which are called Mee Korat. However, their production process is still dependent on the labor force and needs improvement. Although, the substantial effect of Coronavirus pandemic of worldwide, food products demand is adversely increased. The studied company faces the problem of low capacity. This leads to unachieved customer demand which higher than 100% of current production. Due to expanding the market of the company to neighboring countries, such as Lao, Myanmar, improving the production process is crucial. Seven wastes technique has been applied for analyzing and improving productivity. Adjusting the current tooling i.e., spatula turner for stirring sauce slurry at mixing sauce station, and installing portable conveyor for reducing movement of workers at packing station are proposed. The results of these improvements can reduce the number of workforces and laborers’ fatigue. In addition, production and productivity can be increased and respond to the high demand of customers.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124113368","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}
Jaturapit Phongsupa, Artit Yawootti, W. Wattanutchariya
This research aimed to extract chlorogenic acid (CGA) which is an active ingredient found in coffee beans using a pulsed electric field (PEF) as an extraction technique. Factorial design was used for planning an experiment and analyzing appropriate parameters for the extraction. Coffee beans from northern region of Thailand were collected and prepared for the experiment. Material conditions including mixing ratio of coffee bean and solvent and length of blending time were set as independent variables in this study. The condition of PEF intensity, number of pulses and concentration of ethanol solution were set at 5 kV, 1000 pulses and 62.67%. According to the analysis of factorial design and response optimizer, the result showed that the highest total phenolic content of 0.0098 mg CAE/g sample could be extracted from coffee beans: solvent ratio at 0.75 g/ml with 30 seconds blending time. Further investigation on various coffee bean type and PEF conditions are studied to verify an appropriate condition and cost-effective method for active ingredient extraction of local coffee beans of Thailand.
{"title":"Chlorogenic acid extraction of local coffee beans by pulsed electric field","authors":"Jaturapit Phongsupa, Artit Yawootti, W. Wattanutchariya","doi":"10.1063/5.0063781","DOIUrl":"https://doi.org/10.1063/5.0063781","url":null,"abstract":"This research aimed to extract chlorogenic acid (CGA) which is an active ingredient found in coffee beans using a pulsed electric field (PEF) as an extraction technique. Factorial design was used for planning an experiment and analyzing appropriate parameters for the extraction. Coffee beans from northern region of Thailand were collected and prepared for the experiment. Material conditions including mixing ratio of coffee bean and solvent and length of blending time were set as independent variables in this study. The condition of PEF intensity, number of pulses and concentration of ethanol solution were set at 5 kV, 1000 pulses and 62.67%. According to the analysis of factorial design and response optimizer, the result showed that the highest total phenolic content of 0.0098 mg CAE/g sample could be extracted from coffee beans: solvent ratio at 0.75 g/ml with 30 seconds blending time. Further investigation on various coffee bean type and PEF conditions are studied to verify an appropriate condition and cost-effective method for active ingredient extraction of local coffee beans of Thailand.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114248680","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}
One of the big challenges for the management of emergency medical service (EMS) in many urbans is a timely demand response when an emergency call occurs. To minimize patient mortality and disability, the response time of emergency medical services is critical. However, due to the continuous growth of the economic area, residential density, population density, traffic congestion, and epidemic area. Those factors are becoming complex issues for operation level planning, which need accurate and real-time demand area estimates to assign the area of responsibility for ambulance facilities while minimizing response time to emergencies and keep operating costs low. Therefore, in this article, we propose a conceptual framework for integrating multiple factors data both historical data and real-time data from social media to real-time EMS management. We propose an approach for identifying and analyzing hot spots of activity in data collections by using time-varying kernel density estimation (KDE) to convert multiple factors related to ambulance service (point locations and weight) for visualization and detection of abnormal intensities of the activity information and leads to the improvement of the EMS system. In addition, our model was applied to the case study of Bangkok EMS.
{"title":"Activity detection for multi-factors of ambulance demand areas: A case study in Bangkok","authors":"Suriyaphong Nilsang, C. Yuangyai","doi":"10.1063/5.0063773","DOIUrl":"https://doi.org/10.1063/5.0063773","url":null,"abstract":"One of the big challenges for the management of emergency medical service (EMS) in many urbans is a timely demand response when an emergency call occurs. To minimize patient mortality and disability, the response time of emergency medical services is critical. However, due to the continuous growth of the economic area, residential density, population density, traffic congestion, and epidemic area. Those factors are becoming complex issues for operation level planning, which need accurate and real-time demand area estimates to assign the area of responsibility for ambulance facilities while minimizing response time to emergencies and keep operating costs low. Therefore, in this article, we propose a conceptual framework for integrating multiple factors data both historical data and real-time data from social media to real-time EMS management. We propose an approach for identifying and analyzing hot spots of activity in data collections by using time-varying kernel density estimation (KDE) to convert multiple factors related to ambulance service (point locations and weight) for visualization and detection of abnormal intensities of the activity information and leads to the improvement of the EMS system. In addition, our model was applied to the case study of Bangkok EMS.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123056652","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 article deals with the web applications, which are helpful for constructing the semantic categories in various types of disciplines: mathematics, physics, statistics, computer science, linguistics. This software aims at forming the components within the semantic space of the category with unstable hierarchical structure. Such semantic structure with the core and peripheries is observed in the category of deviation. The core includes the most statistically frequent elements, which are connected with each other. The periphery consists of semantically related terms with the components of the core. This structure is considered in mathematics or computer science under the support of applications within cognitive and computational linguistics. Some of the applications are used online or can be designed by the scholar in accordance with the tasks of the research, using special tools for devices. The example of this work is the category of deviation in the framework of mathematical modeling in connection with computational linguistics, building the co-occurrence network of units, constructing frequency list, and doing hierarchical cluster analysis of the units in the system “core-periphery” of the semantic concept, forming the domains. The quantitative content analysis, taking into account the statistical data of contextual analysis and mapping these measurements with web applications, is the key approach in this paper. The object of the quantitative content analysis here is the units of expressing the category of deviation in the work “The Shadow over Innsmouth” by H. Lovecraft. The data received in this work can be essential for scholars in the spheres of computer science, mathematics, physics, computational linguistics as the method of understanding the connections between mathematical operations used in web applications and the meaning. Units within the semantic fields of the category of deviation were considered from the position of quantitative content analysis, mathematics, and cognitive science for the first time.
{"title":"Web applications for the semantic categories","authors":"A. Ptashkin","doi":"10.1063/5.0063778","DOIUrl":"https://doi.org/10.1063/5.0063778","url":null,"abstract":"This article deals with the web applications, which are helpful for constructing the semantic categories in various types of disciplines: mathematics, physics, statistics, computer science, linguistics. This software aims at forming the components within the semantic space of the category with unstable hierarchical structure. Such semantic structure with the core and peripheries is observed in the category of deviation. The core includes the most statistically frequent elements, which are connected with each other. The periphery consists of semantically related terms with the components of the core. This structure is considered in mathematics or computer science under the support of applications within cognitive and computational linguistics. Some of the applications are used online or can be designed by the scholar in accordance with the tasks of the research, using special tools for devices. The example of this work is the category of deviation in the framework of mathematical modeling in connection with computational linguistics, building the co-occurrence network of units, constructing frequency list, and doing hierarchical cluster analysis of the units in the system “core-periphery” of the semantic concept, forming the domains. The quantitative content analysis, taking into account the statistical data of contextual analysis and mapping these measurements with web applications, is the key approach in this paper. The object of the quantitative content analysis here is the units of expressing the category of deviation in the work “The Shadow over Innsmouth” by H. Lovecraft. The data received in this work can be essential for scholars in the spheres of computer science, mathematics, physics, computational linguistics as the method of understanding the connections between mathematical operations used in web applications and the meaning. Units within the semantic fields of the category of deviation were considered from the position of quantitative content analysis, mathematics, and cognitive science for the first time.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127888705","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}
K. Onlaor, Ukit Boontanom, T. Thiwawong, P. Songkeaw, B. Tunhoo
In this work, the iron oxide (Fe2O3) nanoparticles thin films were applied to prepare humidity device. Fe2O3 nanoparticles were prepared by precipitation process following with post sintering process at various temperatures. The properties of Fe2O3 nanoparticles were characterized by X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy, respectively. The effect of sintering temperatures on properties of synthesized particles was investigated. To fabricate the humidity device, the suspension of Fe2O3 nanoparticles in ethanol solvent was dropped on gold interdigited electrodes. The device impedance demonstrated the response of humidity level at various values. The humidity sensing characteristics such as sensitivity, response times, and hysteresis, respectively, were performed. It was observed that the humidity response depended on the post sintering temperatures of Fe2O3 nanoparticles.
{"title":"Preparation of iron oxide (Fe2O3) nanoparticles thin film for humidity sensing device","authors":"K. Onlaor, Ukit Boontanom, T. Thiwawong, P. Songkeaw, B. Tunhoo","doi":"10.1063/5.0064731","DOIUrl":"https://doi.org/10.1063/5.0064731","url":null,"abstract":"In this work, the iron oxide (Fe2O3) nanoparticles thin films were applied to prepare humidity device. Fe2O3 nanoparticles were prepared by precipitation process following with post sintering process at various temperatures. The properties of Fe2O3 nanoparticles were characterized by X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy, respectively. The effect of sintering temperatures on properties of synthesized particles was investigated. To fabricate the humidity device, the suspension of Fe2O3 nanoparticles in ethanol solvent was dropped on gold interdigited electrodes. The device impedance demonstrated the response of humidity level at various values. The humidity sensing characteristics such as sensitivity, response times, and hysteresis, respectively, were performed. It was observed that the humidity response depended on the post sintering temperatures of Fe2O3 nanoparticles.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"466 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125828402","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}
These days, vehicles are widely developed because of the latest technology. As a result, roadside barriers are used not only to minimize the speed of vehicles but also to prevent crossing into the opposite lanes. Many technologies are used to improve the strength of barriers. On the other hand, the production of natural rubber in Thailand is higher than in other Asian countries. The ministry of transportation is focusing on using rubber in roadside barriers. Therefore, in this study, three different types of vehicles with 920, 1575, and 2013 kg at a constant velocity of 35 mph for frontal impact were used to compare the strength of reinforced concrete barriers with and without natural rubber by using non-linear dynamic finite element analysis. Results proved that the barriers with rubber sheets stored energy absorption better than those without rubber sheets.
{"title":"Crash energy absorption aspects of reinforced concrete barriers with natural rubber sheet","authors":"L. Aung, A. Jarasjarungkiat","doi":"10.1063/5.0064505","DOIUrl":"https://doi.org/10.1063/5.0064505","url":null,"abstract":"These days, vehicles are widely developed because of the latest technology. As a result, roadside barriers are used not only to minimize the speed of vehicles but also to prevent crossing into the opposite lanes. Many technologies are used to improve the strength of barriers. On the other hand, the production of natural rubber in Thailand is higher than in other Asian countries. The ministry of transportation is focusing on using rubber in roadside barriers. Therefore, in this study, three different types of vehicles with 920, 1575, and 2013 kg at a constant velocity of 35 mph for frontal impact were used to compare the strength of reinforced concrete barriers with and without natural rubber by using non-linear dynamic finite element analysis. Results proved that the barriers with rubber sheets stored energy absorption better than those without rubber sheets.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125941604","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. Jarasjarungkiat, Phanusit Srijarattanon, Phumin Predatham, Puttanun Hankla
The design of reinforced concrete structures is the foundation of civil engineering. Nowadays, a large number of computer programs are used for structural analysis and design but those programs are expensive to get licenses including unknown sources of information. In this research, the purpose is to develop an application that can design reinforced concrete structures according to ACI 318-95 standard based on residential reinforced concrete structures. Furthermore, Python is used to develop all of the procedures. The developed application is capable to receive data from analytical programs, design and display the result as graphics. Moreover, it can be printed as an efficient construction drawing being convenient for the users. Finally, this research will be an alternative for users who are interested to use a free and accurate application to design reinforced concrete structures.
{"title":"Development of a reinforced concrete design application by Python","authors":"A. Jarasjarungkiat, Phanusit Srijarattanon, Phumin Predatham, Puttanun Hankla","doi":"10.1063/5.0064506","DOIUrl":"https://doi.org/10.1063/5.0064506","url":null,"abstract":"The design of reinforced concrete structures is the foundation of civil engineering. Nowadays, a large number of computer programs are used for structural analysis and design but those programs are expensive to get licenses including unknown sources of information. In this research, the purpose is to develop an application that can design reinforced concrete structures according to ACI 318-95 standard based on residential reinforced concrete structures. Furthermore, Python is used to develop all of the procedures. The developed application is capable to receive data from analytical programs, design and display the result as graphics. Moreover, it can be printed as an efficient construction drawing being convenient for the users. Finally, this research will be an alternative for users who are interested to use a free and accurate application to design reinforced concrete structures.","PeriodicalId":445992,"journal":{"name":"THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122893252","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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