Journal of Applied Research on Science and Technology (JARST)最新文献

{"title":"Preparation of nylon 6/PLA blend nanofibers by needleless electrospinning","authors":"Maneerat Charoenchan, Tanapak Metanawin, Siripan Metanawin","doi":"10.60101/jarst.2023.253756","DOIUrl":"https://doi.org/10.60101/jarst.2023.253756","url":null,"abstract":"The nylon 6/PLA blend nanofibers have been prepared for the first time by needleless electrospinning. The formic acid (FA) was found to be the co-solvent with dichloromethane (DCM) at a ratio of 3:1 for dissolving nylon 6/PLA blend. The nylon 6/PLA blend solutions in various ratios of PLA (8, 10, and 12 wt%) were studied to prepare nanofiber at the applied voltage range of 25 kV to 30 kV. The morphology images of the fibers were shown by scanning electron microscope (SEM). It was found that the average diameter of the nylon 6/PLA blend fibers became smaller as the applied voltage increased from 25 kV to 30 kV and as the PLA content increased from 8 to 12 wt%. The morphology of the fibers became finer with increasing the PLA content. The morphology of the nylon 6:PLA (20:10) nanofibers presented a smooth surface without the formation of beads with an average diameter of 157 nm at the applied voltage of 25 kV. The high PLA content (12 wt%) at a low applied voltage (25 kV) exhibited the bead formation. In contrast, the bead was formed at the medium PLA concentration (10 wt%) at the applied voltage of 30 kV. Therefore, the high PLA content (12 wt%) at a high applied voltage (30 kV) presented a ribbon-like nanofiber of nylon 6/PLA without bead formation. The particle size distribution obtained from SEM images of the nylon 6/PLA nanofiber was narrow at low PLA contents and became broader at higher PLA concentrations.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"73 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140224364","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":"Optimizing pick-place operations: Leveraging k-means for visual object localization and decision-making in collaborative robots","authors":"Naphat Yenjai, Nattasit Dancholvichit","doi":"10.60101/jarst.2023.254153","DOIUrl":"https://doi.org/10.60101/jarst.2023.254153","url":null,"abstract":"This article presents an approach to object localization algorithms for pick-place operations in collaborative robots by utilizing conventional color segmentation in computer vision and k-means clustering. Adding the k-means clustering algorithm complements the color segmentation by distinguishing and grouping the sections of similar pixels; hence, object localization is more accurate. The order of pick-place operations of each cluster acquired from the proposed algorithm is prioritized based on  norm. Integrating the proposed framework provides a well-structured depiction of the localized objects, which is fundamental for successful pick-place operations. The TCP/IP communication framework via socket communication is established to facilitate data transmission between the robot and the host computer. The objective is to ensure that the robot's end effector performs as directed by the host computer by obtaining information on the pick-and-place operation, including the localized coordinates, dimensions, the order of operations, and the pose of the objects of interest to the robot. In this experiment, a cobot arm is employed to autonomously pick and place objects with different shapes and colors in a workspace filled with diverse objects, requiring the robot to choose the closest objects to operate based on the data from the host computer. Our results demonstrate the effectiveness of this integration, showcasing the enhanced adaptability and efficiency of pick-place operations in collaborative robots. This study indicates 98% accuracy in pick-and-place operations with an average latency of 0.52 ± 0.1 s, indicating an improvement compared to the traditional algorithm without k-means clustering, which achieves an accuracy of 88%. Additional studies reveal that when incorporating pose estimation into the pick-place operations, the proposed algorithm's accuracy is 94%. The demonstration highlights the potential of leveraging machine learning algorithms and computer vision from the camera to perform flexible pick-place operations via socket communication.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"56 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139779730","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":"Optimizing pick-place operations: Leveraging k-means for visual object localization and decision-making in collaborative robots","authors":"Naphat Yenjai, Nattasit Dancholvichit","doi":"10.60101/jarst.2023.254153","DOIUrl":"https://doi.org/10.60101/jarst.2023.254153","url":null,"abstract":"This article presents an approach to object localization algorithms for pick-place operations in collaborative robots by utilizing conventional color segmentation in computer vision and k-means clustering. Adding the k-means clustering algorithm complements the color segmentation by distinguishing and grouping the sections of similar pixels; hence, object localization is more accurate. The order of pick-place operations of each cluster acquired from the proposed algorithm is prioritized based on  norm. Integrating the proposed framework provides a well-structured depiction of the localized objects, which is fundamental for successful pick-place operations. The TCP/IP communication framework via socket communication is established to facilitate data transmission between the robot and the host computer. The objective is to ensure that the robot's end effector performs as directed by the host computer by obtaining information on the pick-and-place operation, including the localized coordinates, dimensions, the order of operations, and the pose of the objects of interest to the robot. In this experiment, a cobot arm is employed to autonomously pick and place objects with different shapes and colors in a workspace filled with diverse objects, requiring the robot to choose the closest objects to operate based on the data from the host computer. Our results demonstrate the effectiveness of this integration, showcasing the enhanced adaptability and efficiency of pick-place operations in collaborative robots. This study indicates 98% accuracy in pick-and-place operations with an average latency of 0.52 ± 0.1 s, indicating an improvement compared to the traditional algorithm without k-means clustering, which achieves an accuracy of 88%. Additional studies reveal that when incorporating pose estimation into the pick-place operations, the proposed algorithm's accuracy is 94%. The demonstration highlights the potential of leveraging machine learning algorithms and computer vision from the camera to perform flexible pick-place operations via socket communication.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"51 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139839851","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":"WO3/Bi2WO6 photoanode enhancement for photoelectrocatalytic water oxidation; scan rate effect optimization in the cyclic voltammetry deposition method","authors":"Titsucha Uttayanil, Chatchai Ponchio","doi":"10.60101/jarst.2023.253891","DOIUrl":"https://doi.org/10.60101/jarst.2023.253891","url":null,"abstract":"The photoelectrocatalytic approach is a very efficient technology for eliminating microorganisms and organic contaminants. The development of photoanode is widely recognized as a crucial approach to enhancing the efficiency of photoelectrocatalytic cells. The key goal of this methodology is to enhance the efficacy of photoelectrocatalytic oxidation by optimizing composited photoanode fabrication. This research development focuses mainly on fabricating composite WO3/Bi2WO6 semiconductor thin films with high water oxidation efficiency and favorable photoelectrocatalytic E. coli degradation applications. Cyclic voltammetry was utilized to create WO3/Bi2WO6 thin coatings on conducting glass while optimizing the photoelectrocatalytic activity via the scan rate parameter. The characteristics of the developed electrode, including charge transfer resistance, optical properties, morphology, crystal structure, chemical composition, and oxidation numbers, were investigated to improve photoelectrocatalytic activity. It was observed that the scanning rate significantly influenced the characteristics of the WO3/Bi2WO6 electrode and the photoelectrocatalytic activity on water oxidation. It was discovered that the WO3/Bi2WO6 electrode prepared with a scan rate of 25 mV/s exhibited the greatest photoelectrocatalytic water oxidation as well as distinguishing characteristics from other conditions. The decision to utilize decreased scanning rates has been determined to optimize the reaction kinetics and improve the film-forming properties of WO3/Bi2WO6. Significantly, the developed electrode can also be used to eliminate 87.5% of E.coli in 15 minutes via a photoelectrocatalytic catalytic mechanism. The photoanode composed of WO3/Bi2WO6 has promising capabilities in removing microorganisms and organic pollutants, making it a viable candidate for future advancements in wastewater management applications.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"68 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135169094","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":"Development of a photoelectrocatalytic method to improve the efficiency of E. coli removal","authors":"Kanyarat Hmud, Masashi Hatamoto, Somporn Moonmangmee, Chatchai Ponchio","doi":"10.60101/jarst.2023.253893","DOIUrl":"https://doi.org/10.60101/jarst.2023.253893","url":null,"abstract":"The photoelectrocatalytic technology has attracted significant attention for effectively eliminating organic matter and microbiological pollutants in the environment, owing to its remarkable efficiency and low power consumption. The major goal of this research is to develop and determine the optimal conditions that will facilitate the photoelectrocatalytic technique's enhancement of E. coli eradication. The WO3/BiVO4 photoanode was fabricated on a conductive glass substrate using the automatic dip coating process, employing a layer-by-layer deposition method. Subsequently, the WO3/BiVO4 photoanode was calcinated at 550 °C for 60 minutes. The produced WO3/BiVO4 electrodes were employed as working electrodes to investigate and determine the optimal parameters for enhancing the eradication of E. coli process. The primary factors investigated in this study were the concentration of KCl electrolyte solution and the applied potential. These parameters were examined to identify the best circumstances that would result in the highest efficiency for the degradation of E. coli in a photoelectrochemical system. The study also aimed to comprehend the catalytic mechanism implicated in eliminating E. coli by implementing three different processes: photocatalysis, electrocatalysis, and photoelectrocatalysis. We discovered that the key factors directly influencing E. coli eradication effectiveness under the photoelectrocatalytic process were applied potential and electrolyte solution concentration. The optimum conditions eliminated 99.99% of E. coli in 150 minutes with an initial concentration of 106 CFU/ml, an electrolyte concentration of 0.01 M KCl, and an applied potential of 2.0 V. The study confirmed photoelectrocatalytic cells' efficacy in removing microorganisms and recommended their application in a wider range of wastewater treatment systems.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135217665","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":"Microencapsulation of moringa oil in bio-polymer by simple solvent evaporation technique","authors":"Oraya Kullawong, Amorn Chaiyasat, Preeyaporn Chaiyasat","doi":"10.60101/jarst.2023.253714","DOIUrl":"https://doi.org/10.60101/jarst.2023.253714","url":null,"abstract":"Moringa oil (MO) contains various bioactive components and pharmacology. It is attractive to use as a raw ingredient in various products. However, there are limitations on its direct utilization, especially MO's instability and hastening the active ingredient's degradation from external environmental factors, including temperature, humidity, oxidation, light, and heat. To solve these problems, in this work, microencapsulation of MO using different biopolymers as cellulose acetate butyrate (CAB), ethyl cellulose (EC), and poly(L-lactic acid) (PLLA) were carried out by a simple solvent evaporation technique. The prepared polymer microcapsule suspensions were highly colloidal stable for all types of biopolymers and ratios. The spherical biopolymer capsules were formed to a micrometer size after solvent evaporation under all conditions. However, when the microcapsules were dried, aggregation was found with the polymer microcapsules at a ratio of PLLA to MO of 50:50 for all three types of polymers, possibly due to the low amount of polymer to completely encapsulate all of MO. When polymer contents increased to 70%, the dried spherical polymer microcapsules were smoothly produced. Using 70% polymers, the PLLA microcapsule surface was smoother than the polymer microcapsules prepared by CAB and EC which exhibited the dent or hole on the outer surface. Micrometer size, spherical polymer capsules with a core-shell morphology were fabricated. Due to the higher hydrophilicity of the polymer than the MO, the polymer moves outward, forming a strong shell around the MO. Then, all three biopolymers can be used for the microencapsulation of MO at a suitable polymer to MO ratio. However, using PLLA at a ratio of PLLA to MO of 70:30 presented the highest encapsulation efficiency (74.08%), which may be due to its high molecular weight. Because of the non-toxicity and biodegradability of biopolymers, the fabricated microcapsules would be well applied in cosmetic products.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135966538","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":"Cold pressed virgin coconut oil production: Enhancing energy efficiency through a closed tunnel hot air generation system","authors":"Boonthong Wasuri, Sombat Hathairattananon, Bopit Chainok","doi":"10.60101/jarst.2023.251713","DOIUrl":"https://doi.org/10.60101/jarst.2023.251713","url":null,"abstract":"The primary aim of this paper was to research and develop a closed tunnel house hot air production system, focusing on cost reduction in the cold-pressed coconut oil production process. The study's scope was centered on a case analysis of Tropicana Oil Co. Ltd. situated in Sampran district, Nakhon Pathom province. The research encompassed the design of a system capable of generating hot air and conserving thermal energy within a closed tunnel house environment. This included developing and constructing a prototype system tailored to this purpose. One of the key objectives was to assess the system's efficiency within the closed tunnel house setup. The broader goal was to enhance air temperature while reducing moisture content before initiating the coconut drying process. It was achieved through an electricity-powered hot air-drying technique, the process aimed to efficiently eliminate water or moisture from dried coconut, priming it for the subsequent cold-pressed oil extraction phase. The resulting system is anticipated to yield multiple benefits. It's projected to curtail energy consumption for operators by minimizing temperature losses within the system. This is facilitated by augmenting natural heat to elevate the air and container temperature during baking. Furthermore, this research unveiled insights into the optimal tunnel house configuration as a highly effective heat source. It also advanced knowledge in creating low-humidity heat storage systems and measurement/control mechanisms tailored for specific tasks. These innovations are anticipated to have applications beyond the coconut oil industry, extending to other sectors reliant on heat energy for production processes.","PeriodicalId":479861,"journal":{"name":"Journal of Applied Research on Science and Technology (JARST)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136236218","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}