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ECORFAN Journal Taiwan最新文献

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Comparative study of thermal efficiency of flat spiral vs. conical spiral in a parabolic solar collector 抛物面太阳能集热器中平面螺旋与锥形螺旋热效率的比较研究
ECORFAN Journal Taiwan Pub Date : 2020-12-31 DOI: 10.35429/ejt.2020.8.4.24.27
Tomás Avalos-Sanchez, Patricia Robles-Velazquez, M. Prado-Salazar
{"title":"Comparative study of thermal efficiency of flat spiral vs. conical spiral in a parabolic solar collector","authors":"Tomás Avalos-Sanchez, Patricia Robles-Velazquez, M. Prado-Salazar","doi":"10.35429/ejt.2020.8.4.24.27","DOIUrl":"https://doi.org/10.35429/ejt.2020.8.4.24.27","url":null,"abstract":"Compare the thermal efficiency of two kind of heat by radiant energy concentrated by a parabolic solar collector. Methodology: became two spirals with 1.3 m length and diameter 3/8” copper pipe, which were controlled water flow from one step and recirculated making temperature measurements to water in container return and readings taken every 5 minutes. These coils were placed at the focal point of a parabolic solar collector of 77 cm in diameter and concavity of 6.6 cm. both proved to be very efficient in heat absorption and transmission to the water into itself, which showed greater heat loss but was the conical, although it wasn't exposed to air currents and that it had an aluminum housing. Meanwhile the flat spiral showed greater uniformity in the behavior of temperatures despite being exposed to air currents.The maximum temperature reached, at a flow rate of 0.15 l/min, was 97.5 ° C in 30 minutes from the initial temperature. Lower flows did not allow to make a reliable temperature reading since the water was going into its vapor phase.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115242411","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}
引用次数: 0
Characterization of a copper susceptor sensitive to solar IR and UV radiation 一种对太阳红外和紫外辐射敏感的铜感受器的表征
ECORFAN Journal Taiwan Pub Date : 2020-12-31 DOI: 10.35429/ejt.2020.8.4.20.23
J. Zárate-Corona, Julio Teloxa-Reyes, Daniel Aguilar-Galvan
{"title":"Characterization of a copper susceptor sensitive to solar IR and UV radiation","authors":"J. Zárate-Corona, Julio Teloxa-Reyes, Daniel Aguilar-Galvan","doi":"10.35429/ejt.2020.8.4.20.23","DOIUrl":"https://doi.org/10.35429/ejt.2020.8.4.20.23","url":null,"abstract":"Renewable energies use has become the best alternative to reduce the damage effects due to global warming. In this work it is presented the characterization for a copper susceptor being sensible to IR and UV sun radiation, the susceptor was installed in the focus of a parabolic antenna reaching temperatures around 300°C. The susceptor is elaborated from type “K” thermocouples as transducers from heat energy to electric energy, thermocouples were mounted on a copper bar which received a chemical treatment in order to obtain an oxide film sensible to IR and UV sun radiation it is shown the absorption specters of the film taking as a reference the air absorption spectres measured with a BRUKER® equipment. Thermocouple array consist of 800 elements connected on parallel and series, final setup will be disposed in a configuration able to reduce atmospheric perturbations and absorb the high sun radiation values available at UPTlax Campus, it has been evaluated the effectiveness of the presented technology as a viable proposal that could be an alternative to the conventional silice photovoltaic cells.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122181388","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}
引用次数: 0
Solar Concentrator PDR with solar tracking 带太阳能跟踪的太阳能集中器PDR
ECORFAN Journal Taiwan Pub Date : 2020-06-30 DOI: 10.35429/ejt.2020.7.4.1.8
Pino Duran, J. G. Barbosa, P. Quinto, L. Moreno
{"title":"Solar Concentrator PDR with solar tracking","authors":"Pino Duran, J. G. Barbosa, P. Quinto, L. Moreno","doi":"10.35429/ejt.2020.7.4.1.8","DOIUrl":"https://doi.org/10.35429/ejt.2020.7.4.1.8","url":null,"abstract":"The reduction in conventional fuels consumption can be accomplished through the use of solar energy, transforming it into thermal energy throught a solar collector. There are a lot of solar collector kind, but the solar concentration way, specifically the parabolic dish reflector technology, or just PDR solar concentrator, offers one of the most efficient paths to achieve high quality thermal energy. Usually, the PDR solar concentrator are designed in big dimensions in order to generate electrical energy; nevertheless this technology could be used in minor scale in order to generate solar concentration high levels to achieve enough thermal energy to satisfy hot water demand in residential buildings, homes and even the industry. The prototype here presented was developed in four phases: The parabolic dish, the gear box and mechanical support device, the sun tracking control system and finally the system integration and operational tests. The four phases conjunction results in a totally operative prototype with the capability of achieve temperatures of 400 ºC, over a concentration focal point under partially cloudy day conditions.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124421207","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}
引用次数: 0
Prototype robot rover with Arduino, LabVIEW and mobile devices 基于Arduino、LabVIEW和移动设备的机器人漫游车原型
ECORFAN Journal Taiwan Pub Date : 2020-06-30 DOI: 10.35429/ejt.2020.7.4.28.34
M. Beltran, Oscar Salinas, M. Luna-Ortíz
{"title":"Prototype robot rover with Arduino, LabVIEW and mobile devices","authors":"M. Beltran, Oscar Salinas, M. Luna-Ortíz","doi":"10.35429/ejt.2020.7.4.28.34","DOIUrl":"https://doi.org/10.35429/ejt.2020.7.4.28.34","url":null,"abstract":"Terrestrial robot prototype all – terrain explorer, for exploration of areas that pose a danger to humans was developed. Mega Arduino microcontroller was used for remote control of the robot's movements as well as shipping and receiving signals in a wireless way. The visual interface is adapted to be used with mobile devices, with which the robot can be controlled, and also signal processing for decision- making. This visual interface was developed in LabVIEW executable mode, so this software not need be installed on the mobile device. A comparison between RF technologies and Wi - Fi point to point, no significant difference was found between them, with respect to the wireless functionality of the robot. The terrestrial prototype designed has four wheels, it is functional is independent and can be moved into different types of surface and places where humans cannot access, either for safety or for the same site. The proof of concept was successful, the prototype is expandable in functionality, appropriate technologies and application-specific functions can be integrated into the overall scheme.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115280618","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}
引用次数: 0
Mechatronic system to assist rehabilitation therapies for shoulder and elbow joints: Design, kinematic analysis, building and HMI 辅助肩关节和肘关节康复治疗的机电系统:设计、运动学分析、构建和人机界面
ECORFAN Journal Taiwan Pub Date : 2020-06-30 DOI: 10.35429/ejt.2020.7.4.9.17
F. Aguilar-Pereyra
{"title":"Mechatronic system to assist rehabilitation therapies for shoulder and elbow joints: Design, kinematic analysis, building and HMI","authors":"F. Aguilar-Pereyra","doi":"10.35429/ejt.2020.7.4.9.17","DOIUrl":"https://doi.org/10.35429/ejt.2020.7.4.9.17","url":null,"abstract":"This work presents a novel application of a system to assist therapies during upper limb rehabilitation. The design and kinematic analysis of a device proposed is presented. Two mechanisms are driven by only one motor develop circular, arc and linear paths in order to move the shoulder and elbow joints in rehabilitation therapies. The first mechanism M1 position, velocity and acceleration are analyzed and its graphics respect to time are obtained. The main goal is to develop a mechatronic system which help to therapists during shoulder or elbow rehabilitation activities and be able to record the patient movements during the session. The methodology includes the study of art state, biomechanic analysis of shoulder and elbow joints, mechanism type selection and kinematic analysis in MATLAB® and its validation in ADAMS®. The main contribution is the proposal of an easy to use mechanism that develop three paths for upper limb rehabilitation. The amplitude and velocity of movements can be programmed, monitored and registered in a computational system and the information used to improve therapy.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121748251","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}
引用次数: 0
Image resolution enhancement via sparse interpolation on wavelet domain 基于小波域稀疏插值的图像分辨率增强
ECORFAN Journal Taiwan Pub Date : 2020-06-30 DOI: 10.35429/ejt.2020.7.4.18-.27
Román Chavez, Volodymyr Ponomaryow, Fernando Castro
{"title":"Image resolution enhancement via sparse interpolation on wavelet domain","authors":"Román Chavez, Volodymyr Ponomaryow, Fernando Castro","doi":"10.35429/ejt.2020.7.4.18-.27","DOIUrl":"https://doi.org/10.35429/ejt.2020.7.4.18-.27","url":null,"abstract":"The image processing algorithms collectively known as super-resolution (SR) have proven effective in producing high-quality imagery from low-resolution (LR) images. This paper focuses on a novel image resolution enhancement method employing the wavelet domain techniques. In order to preserve more edge information, additional edge extraction step is proposed employing high-frequency (HF) sub-band images - low-high (LH), high-low (HL), and high-high (HH) - via the Discrete Wavelet Transform (DWT). In the designed procedure, the LR image is used in the sparse interpolation for the resolution-enhancement obtaining low-low (LL) sub- band. Additionally, all sub-bands (LL, LH, HL and HH) are performed via the Lanczos interpolation. Finally, the estimated sub-band images are used to form the new high-resolution (HR) image using the inverse DWT (IDWT). Experimental results on real data sets have confirmed the effectiveness of the proposed framework in terms of objective criteria as well as in subjective perception.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114076365","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}
引用次数: 0
Laser power density effect on the properties of Sb2S3 thin films prepared by pulsed laser assisted chemical bath deposition 激光功率密度对脉冲激光辅助化学浴沉积Sb2S3薄膜性能的影响
ECORFAN Journal Taiwan Pub Date : 2019-12-31 DOI: 10.35429/ejt.2019.6.3.1.6
Nabile Edith Rodríguez-García, F. A. Vázquez-Gálvez, Fernando Estrada-Saldaña, Israel Hernández-Hernández
{"title":"Laser power density effect on the properties of Sb2S3 thin films prepared by pulsed laser assisted chemical bath deposition","authors":"Nabile Edith Rodríguez-García, F. A. Vázquez-Gálvez, Fernando Estrada-Saldaña, Israel Hernández-Hernández","doi":"10.35429/ejt.2019.6.3.1.6","DOIUrl":"https://doi.org/10.35429/ejt.2019.6.3.1.6","url":null,"abstract":"Antimony Sulfide (Sb2S3) thin films were prepared using the laser assisted chemical bath deposition technique. The precursors used in the chemical bath were antimony chloride and sodium thiosulfate, the deposit was made at room temperature on glass substrate, while it was irradiated with a wavelength of 532 nm of the pulsed Nd:YAG laser. In this work, we studied the effects of energy density (1.97 x 107 and 7.07 x 106 W/cm2) and the irradiation time (30, 45 and 60 min) during the deposition process on the structure and the optical and electrical properties of the antimony sulfide films. The structure, composition, and optical and electrical properties were analyzed by X-Ray Diffraction (XRD), Raman Spectroscopy and X-Ray Emitted Photoelectron Spectroscopy (XPS), UV-Vis spectroscopy and photoconductivity. The results showed that the laser assisted chemical deposition technique is an effective synthesis technique for obtaining thin films of antimony sulfide for optoelectronic applications or in solar cells.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133950296","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}
引用次数: 0
Market research to identify commercial viability of buccal tablets based on white clay 市场研究，以确定以白粘土为基础的口腔片的商业可行性
ECORFAN Journal Taiwan Pub Date : 2019-06-30 DOI: 10.35429/ejt.2019.5.3.21.23
Isidro González-Vázquez, Martha Patricia Ángel-García, Raul Arteaga-Iturrarán
{"title":"Market research to identify commercial viability of buccal tablets based on white clay","authors":"Isidro González-Vázquez, Martha Patricia Ángel-García, Raul Arteaga-Iturrarán","doi":"10.35429/ejt.2019.5.3.21.23","DOIUrl":"https://doi.org/10.35429/ejt.2019.5.3.21.23","url":null,"abstract":"About a billion tubes of toothpaste are discarded in landfills every year. It becomes a real environmental problem considering that the package is composed of 75% plastic and 25% aluminum. Aware of this, new green brands go on the market with the will to eradicate such waste. The idea is to validate the developing of a toothpaste that is a pill that is used for cleaning teeth that will be mainly clay combined with coconut oil. Making this toothpaste will result on a better dental health as well as taking care of the environment, helping to eliminate plastics. Using clay and coconut oil has prove to destroy of all types of microbes, viruses, bacteria, many of which harm our oral hygiene. Helping to solve the problem of caries that affects 60 to 90 percent of the population by improving their dental hygiene. Survey in a simple of 383 inhabitans was taken in order to Identify areas of commercial opportunity and the willingness of the consumer to purchase oral cleaning tablets.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114435256","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}
引用次数: 0
Analysis by Pfeiffer chromatography on soil improved with bocashi and native microorganisms 用普发色谱法分析博卡什和原生微生物改良土壤
ECORFAN Journal Taiwan Pub Date : 2019-06-30 DOI: 10.35429/ejt.2019.5.3.7.12
Tarsicio Medina-Saavedra, G. Arroyo-Figueroa, Jobana Marleth Maldonado-Pacheco, Miriam Paola Cárdenas-Lara
{"title":"Analysis by Pfeiffer chromatography on soil improved with bocashi and native microorganisms","authors":"Tarsicio Medina-Saavedra, G. Arroyo-Figueroa, Jobana Marleth Maldonado-Pacheco, Miriam Paola Cárdenas-Lara","doi":"10.35429/ejt.2019.5.3.7.12","DOIUrl":"https://doi.org/10.35429/ejt.2019.5.3.7.12","url":null,"abstract":"Ehrenfried Pfeiffer (1899-1961), created a technique with which one can observe the qualitative characteristics of soils, composts and biofertilizers. The research seeks to evaluate soil improvement by applying native microorganisms by Pfeiffer Chromatography as a way to remedy it. Representative samples of a soil worked with conventional agriculture and improved with a compost were taken, the first sample at the beginning of the test and the following three every week after applying a Bocashi-type organic fertilizer made from native microorganisms; the soil samples were analyzed separately by the Pfeiffer chromatography technique. The control sample revealed a compacted, mineralized soil, with a small amount of organic matter and without biological activity, while the other samples with the soil already improved revealed the presence of organic matter with minerals integrated in the soil, also showing the presence of Enzymatic factors and the good biological and chemical activity manifested by the harmony between their zones. It is possible to conclude that Pfeiffer chromatography represents a simple tool to know the evolution of a soil by improving it with organic matter and efficient microorganisms manifesting some qualitative characteristics that indicate its progress.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"2000 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128271019","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}
引用次数: 0
Effect of base type on the dissolution of quartz with triisopropanolamine in minerals with silver occluded in quartz 碱型对三异丙醇胺在含银石英中溶解石英的影响
ECORFAN Journal Taiwan Pub Date : 2019-06-30 DOI: 10.35429/ejt.2019.5.3.1.6
M. Salazar-Hernández, E. Elorza-Rodríguez, C. Salazar-Hernández, J. Mendoza-Miranda
{"title":"Effect of base type on the dissolution of quartz with triisopropanolamine in minerals with silver occluded in quartz","authors":"M. Salazar-Hernández, E. Elorza-Rodríguez, C. Salazar-Hernández, J. Mendoza-Miranda","doi":"10.35429/ejt.2019.5.3.1.6","DOIUrl":"https://doi.org/10.35429/ejt.2019.5.3.1.6","url":null,"abstract":"The processing of refractory minerals of gold and / or silver occluded in quartz in sizes less than 1 μm is not viable, due to the chemical inertness of the silica. The treatment of these minerals is usually carried out by reduction of particle size by fine grinding that allows the release of the occluded particles. As an alternative to processing these minerals, has proposed the partial dissolution of the silica with diols in basic medium; in these studies partial dissolution of the matrix has been observed in 25% with triisopropanolamine and 3% mol KOH. The present work shows the effect of the type of base (organic-amines) in the dissolution of the matrix, observing a greater dissolution with the basic character of these and with the chelating effect of the same ones. Et3N was the weak base that showed the highest dissolution of the matrix, observing a dissolution rate (0.67 mmolmin-1) 2.5 times lower than that observed with KOH (1.66 mmolmin-1), similarly the observed effective diffusion coefficient was of an order of magnitude lower than that observed with KOH.","PeriodicalId":356684,"journal":{"name":"ECORFAN Journal Taiwan","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125236287","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}
引用次数: 0
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