发布求助
文献互助 智能选刊 最新文献

Journal of Scientific and Technical Applications最新文献

筛选
英文 中文
Comparative study of P25/BiOCl mixtures as photocatalysts in Acid Orange 7 degradation P25/BiOCl混合光催化剂降解酸性橙7的比较研究
Journal of Scientific and Technical Applications Pub Date : 2021-08-30 DOI: 10.35429/jsta.2021.19.7.25.28
Lorena N. Mendez-Alvarado, Miguel A. RIVERA-FLORES, Miguel A. Sandoval, Rosalba Fuentes
{"title":"Comparative study of P25/BiOCl mixtures as photocatalysts in Acid Orange 7 degradation","authors":"Lorena N. Mendez-Alvarado, Miguel A. RIVERA-FLORES, Miguel A. Sandoval, Rosalba Fuentes","doi":"10.35429/jsta.2021.19.7.25.28","DOIUrl":"https://doi.org/10.35429/jsta.2021.19.7.25.28","url":null,"abstract":"Objectives. Among strategies used to improve the photocatalytic properties of titanium dioxide (TiO2), coupled semiconductor has been widely studied. Bismuth oxychloride (BiOCl) semiconductor has been highlighted, specially, with hierarchical structures (3D), because it has been shown to have higher performance in the photodegradation of organic dyes in wastewater. Therefore, in this work the degradation efficiency of acid orange 7 (AO7) was studied using TiO2 (P25 Degussa), synthesized BiOCl with hierarchical structure, and mixtures of them as photocatalysts. Methodology. BiOCl was synthesized by the solvothermal method. The BiOCl was characterized by different techniques such as X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the pore distribution and the surface area were determined. Photocatalytic experiments were carried out with a photocatalyst dose of 1 g‧L-1, initial dye concentration of 50 mg‧L-1, and UV light illumination. Contribution. The interaction of P25 Degussa with BiOCl microspheres (75/25, respectively) improved the photocatalytic degradation achieving a 50% degradation efficiency.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"280 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114255092","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
Containers vs. virtual machines: performance comparison 容器与虚拟机:性能比较
Journal of Scientific and Technical Applications Pub Date : 2021-07-31 DOI: 10.35429/jsta.2021.20.7.1.9
David RAMIREZ-PERALTA, Ever ALCUDIA-FUENTES
{"title":"Containers vs. virtual machines: performance comparison","authors":"David RAMIREZ-PERALTA, Ever ALCUDIA-FUENTES","doi":"10.35429/jsta.2021.20.7.1.9","DOIUrl":"https://doi.org/10.35429/jsta.2021.20.7.1.9","url":null,"abstract":"Server virtualization is a technological innovation widely used in information technology (IT) companies. Virtualization provides a platform to run different operating system services in the cloud. It makes it easy to build multiple virtual machines on a single basic physical machine, either in the form of hypervisors or containers. To host many microservices applications, emerging technology has introduced a model consisting of different operations performed by smaller individual deployed services. Therefore, the demand for low-cost virtualization techniques is developing rapidly. There are many lightweight virtualization technologies; Docker is one of them, which is an open-source platform. This technology enables developers and system administrators to build, create, and run applications using the Docker engine. This document provides performance evaluation of Docker containers and virtual machines using standard benchmark tools such as Sysbench, Phoronix, and Apache, including CPU performance, memory performance, storage read/write performance, load test and measurement of operating speed.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133567861","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
Computational program to evaluate local defects type Chalmers Test on a reflective optical surface 评价反射光学表面局部缺陷型查尔默斯试验的计算程序
Journal of Scientific and Technical Applications Pub Date : 2021-06-30 DOI: 10.35429/jsta.2021.19.7.18.24
B. Canales-Pacheco, E. Rueda-Soriano, Luis Alberto RUIZ-AGUILAR, Raymundo Sergio Noriega-Loredo
{"title":"Computational program to evaluate local defects type Chalmers Test on a reflective optical surface","authors":"B. Canales-Pacheco, E. Rueda-Soriano, Luis Alberto RUIZ-AGUILAR, Raymundo Sergio Noriega-Loredo","doi":"10.35429/jsta.2021.19.7.18.24","DOIUrl":"https://doi.org/10.35429/jsta.2021.19.7.18.24","url":null,"abstract":"A computational tool is developed to measure the local deformations in optical surfaces from the interference patterns obtained by the Chalmers test principle and from the analysis of a reflective optical surface using a commercial Fizeau interferometer of the ZYGO. The tests were made on a concave spherical mirror with a radius of curvature of 60 cm and a diameter of 13 cm. To obtain the measurements of local deformations, a computational tool proposed for the localization of dark fringes is used by evaluating the maximum and minimum of the image obtained in the interference patterns. The results obtained show that the computational tool allows locating fringes within an interference pattern, allowing faster inter-fringe measurements and assigning an error on the surface in terms of wavelength.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129375209","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
Materials for the intervention of construction systems for adobe housing 土坯房屋施工系统干预用材料
Journal of Scientific and Technical Applications Pub Date : 2020-12-30 DOI: 10.35429/JSTA.2020.18.6.19.31
Alberto Rosendo CASTILLO-REYES, M. Vázquez-Torres, A. Morales-Ortega, Rubén Ángel Montero-Urrusquieta
{"title":"Materials for the intervention of construction systems for adobe housing","authors":"Alberto Rosendo CASTILLO-REYES, M. Vázquez-Torres, A. Morales-Ortega, Rubén Ángel Montero-Urrusquieta","doi":"10.35429/JSTA.2020.18.6.19.31","DOIUrl":"https://doi.org/10.35429/JSTA.2020.18.6.19.31","url":null,"abstract":"This research aims to identify the relationship between the deterioration of constructions and restoration systems that will allow their permanence. The method applied to this research is qualitative in nature to publicize the maintenance systems that will allow the recovery of adobe constructions and recognize the technical richness. Qualitative research allows us to establish the observations of the social world, considering the experiences of the community, so that they can obtain information about their values, experiences, practices, customs and traditions. All this to come to issue solutions that do not attack your social environment and your urban image. The stages of the research were: fieldwork linking access to the field with productive data collection; data analysis in a continuous review that consisted of reducing information, disposition, transformation and obtaining results and verifying them to reach conclusions. Finally, the preparation of the report generated various approaches, and one of them produced the theme of this work whose contribution is that it identifies the constructive systems that can serve to generate new lines of research to promote the conservation of traditional architecture.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133879963","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
Uitsiton: wearable for mobility of the visually impaired 适用于视障人士的可穿戴设备
Journal of Scientific and Technical Applications Pub Date : 2020-09-30 DOI: 10.35429/jsta.2020.18.6.7.18
Adrian BUENDÍA-MARTÍNEZ, Lizbeth Gallardo-López
{"title":"Uitsiton: wearable for mobility of the visually impaired","authors":"Adrian BUENDÍA-MARTÍNEZ, Lizbeth Gallardo-López","doi":"10.35429/jsta.2020.18.6.7.18","DOIUrl":"https://doi.org/10.35429/jsta.2020.18.6.7.18","url":null,"abstract":"This article explains the development of the Uitsiton system, capable of detecting obstacles to alert visually impaired users, increasing their mobility and confidence when moving. Uitsiton is made up of a portable electronic device (wearable) and a mobile application (App) that operates under the Android platform. The wearable is integrated into a vest-like garment. It is used to compute the approximate distance between the visually impaired user and the obstacles that they can find in their path. The wearable covers a range of 180 degrees vertically and horizontally with respect to the center of the torso, and reaches a maximum distance of 120 cm. The App works synchronously with the wearable, it receives a series of data corresponding to the measurements of the distance between the user and the obstacle, and it triggers a sound pattern and a vibration pattern according to the proximity of the obstacle.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130795964","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
Técnicas para la implementación de turbo decodificadores con baja latencia 实现低延迟涡轮解码器的技术
Journal of Scientific and Technical Applications Pub Date : 2019-06-30 DOI: 10.35429/jsta.2019.15.5.29.41
Lennin C. Yllescas-Calderon, R. Parra-Michel, L. F. Gonzalez-Perez
{"title":"Técnicas para la implementación de turbo decodificadores con baja latencia","authors":"Lennin C. Yllescas-Calderon, R. Parra-Michel, L. F. Gonzalez-Perez","doi":"10.35429/jsta.2019.15.5.29.41","DOIUrl":"https://doi.org/10.35429/jsta.2019.15.5.29.41","url":null,"abstract":"Turbo coding is a channel coding technique that increases the capacity of communications systems, especially wireless and mobile. Due to its high correction capability, this technique is used in modern wireless communication standards such as 3GPP and LTE/LTE-Advanced. One of the features of these systems is the increase in data processing capacity, where transmission rates of up to 1 Gbps are specified. However, the turbo coding technique inherently presents a limited performance as a consequence of the turbo decoding process at the reception stage. The turbo decoder presents a high operation latency mainly caused by the iterative decoding process, the interleaver and deinterleaver stage and the estimation process of the information bits. In this work, we show the techniques used to implement modern low-latency turbo decoders suitable for 3G and 4G standards.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"1 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":"129893155","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
Evaluation of a FO-PID Controller in a Buck DC/DC Converter Model Buck DC/DC变换器模型中FO-PID控制器的评估
Journal of Scientific and Technical Applications Pub Date : 2019-06-30 DOI: 10.35429/JSTA.2019.15.5.1.8
G. Muñoz-Hernández, Ana S Damian-Mora, Jose Ramirez-Espinoza, Jesús Chávez-Galán
{"title":"Evaluation of a FO-PID Controller in a Buck DC/DC Converter Model","authors":"G. Muñoz-Hernández, Ana S Damian-Mora, Jose Ramirez-Espinoza, Jesús Chávez-Galán","doi":"10.35429/JSTA.2019.15.5.1.8","DOIUrl":"https://doi.org/10.35429/JSTA.2019.15.5.1.8","url":null,"abstract":"The applications of electrical energy converters are wide. It is a common device that can be found in almost every apparatus, both industrial and domestic. This work will deal with linear and nonlinear models of DC/DC converters. Those models will used to probe, by simulation, classic and advance controllers. PID controllers have shown a good response regulating DC/DC converters, for that reason the inclusion of two more degree of freedom due to the Integral and derivative of Fractional Order, could improve the performance of these controllers. Furthermore, Piecewise modeling can be useful to obtain adaptive controllers whose parameters change at different operational conditions.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"24 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":"132113979","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
Strength of the shaft/hub joint using a finite element model 使用有限元模型计算轴/轮毂连接的强度
Journal of Scientific and Technical Applications Pub Date : 2019-06-30 DOI: 10.35429/jsta.2019.15.5.9.18
M. Salgado‐Cruz, Claudia Cortés-García, D. Szwedowicz-Wasik, E. Martínez-Rayón
{"title":"Strength of the shaft/hub joint using a finite element model","authors":"M. Salgado‐Cruz, Claudia Cortés-García, D. Szwedowicz-Wasik, E. Martínez-Rayón","doi":"10.35429/jsta.2019.15.5.9.18","DOIUrl":"https://doi.org/10.35429/jsta.2019.15.5.9.18","url":null,"abstract":"This article describes the effect of the roughness size on the axial slip strength between the parts of shaft/hub joints with interference fit. The surface roughness was obtained from a turning process with different finishes (fine, medium and rough). A finite element modeling was developed, which uses a normal contact stiffness equivalent to the size of the surface roughness between the joint pieces to represent the real contact. In order to validate the numerical model, theoretical results of contactpressure and extraction force of the shaft/hub joint with smooth elements were compared with the corresponding numerical results obtained. The numerical results from studies that considered the size of the surface roughness showed that the axial load capacity of the joint decreased with larger roughness.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"30 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":"114744516","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
Mejora de contraste de imagenes de mamografía mediante procesamiento digital de imagen 通过数字图像处理提高乳房x线照相术图像的对比度
Journal of Scientific and Technical Applications Pub Date : 2019-06-30 DOI: 10.35429/jsta.2019.15.5.19.28
J. Quintanilla, B. Ojeda, R. Ruelas, J. Yáñez
{"title":"Mejora de contraste de imagenes de mamografía mediante procesamiento digital de imagen","authors":"J. Quintanilla, B. Ojeda, R. Ruelas, J. Yáñez","doi":"10.35429/jsta.2019.15.5.19.28","DOIUrl":"https://doi.org/10.35429/jsta.2019.15.5.19.28","url":null,"abstract":"This paper shows the obtained results of applying image enhancement techniques in regions of interest extracted of mamographies. The objective is to improve the detection of breast lesions, such as the microcalcifications and thus contribute to the early detection of breast cancer. Usually, the quality of the region of interest images is not better, and they have some deficiencies that difficult the microcalcifications detection. Due to this, the approach in this paper is to increase the quality of the region of interest image by means of edge and contour enhancement, modifying the contrast and noise reduction and its possible suppression of the background of the image. The techniques that were implemented are the modification of the contrast by lineal and non-lineal transformations, the histogram equalization technique, spatial filtering technique and a technique based on mathematical morphology operations. Finally, a contrast improvement index was applied in order to evaluate in a quantitative way each of the contrast enhancement technique implemented.","PeriodicalId":344827,"journal":{"name":"Journal of Scientific and Technical Applications","volume":"2011 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":"114868042","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: 1
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信