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Análisis de las condiciones de iluminación en las aulas del Departamento de Ingeniería Civil de la Universidad de Guanajuato de acuerdo con la NOM-025-STPS-2008 y NOM-007-ENER-2014 根据NOM-025-STPS-2008和nom -007- enar -2014,瓜纳华托大学土木工程系教室的照明条件分析
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.548
L. E. C. Valencia, César Leonardo Ruiz Jaime, E. M. A. Guzmán
Since ancient times humans have used various ways of illuminating the spaces inhabited, initially to protect themselves and now to continue with activities related with the day. However, the lighting in-room houses and public buildings including schools do not have the appropriate levels, low levels can lead to health consequences for users or high levels leads low energy efficiency, so that this study analyzed the lighting in the classrooms of Civil Engineering Department of the University of Guanajuato and compared with the levels set in the Mexican standards. From the results it was concluded that natural lighting is insufficient for reading and writing activities, a situation that is solved with of artificial light, although the classrooms analyzed are energy efficient the production of electricity involves an environmental impact.
自古以来,人类就使用各种方式照亮居住的空间,最初是为了保护自己,现在则继续与白天有关的活动。然而,室内房屋和包括学校在内的公共建筑的照明没有适当的水平,低水平可能导致用户的健康后果或高水平导致低能源效率,因此本研究分析了瓜纳华托大学土木工程系教室的照明,并与墨西哥标准中设定的水平进行了比较。从结果中得出的结论是,自然采光不足以进行阅读和写作活动,这种情况可以通过人工照明来解决,尽管分析的教室是节能的,但电力的生产涉及环境影响。
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引用次数: 0
Estudios de repetibilidad y reproducibilidad de métodos no destructivos en maderas angiospermas. 被子植物木材无损方法的重复性和重现性研究。
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.533
J. R. S. Castellanos, René Navarrete Padilla
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引用次数: 0
La lógica de la gestión del riesgo volcánico 火山风险管理的逻辑
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.558
Servando de la Cruz Reyna
Volcanic risk management presents difficulties that are inherent to the nature of the eruptive activity, namely the inaccessibility of the magmatic systems and the multiple interpretations attributable to the signals recorded on the surface. Authorities responsible for the protection of the population require the decision factors that the scientific community may provide, which, with such epistemic uncertainties, must seek ways to identify and communicate the basic elements of the volcanic process that support correct decisions, which otherwise may compromise the safety of large sectors of the population in vulnerable regions.
火山风险管理带来的困难是火山喷发活动固有的性质,即岩浆系统的不可接近性和归因于地表记录的信号的多种解释。负责保护人口的当局需要科学界可能提供的决策因素,由于认识上的不确定性,科学界必须设法确定和传达火山过程的基本要素,以支持正确的决定,否则这些决定可能危及脆弱地区大部分人口的安全。
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引用次数: 0
Transformadores de Potencia con Doble Núcleo: Análisis de respuesta a la frecuencia 双芯电力变压器:频率响应分析
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.543
C. Rojas, Sigridt Garcí­a Martínez
The Frequency Response Analysis (FRA), is an excellent tool for the diagnosis and detection of internal faults in a transformer, such as: a displacement and winding deformation due to electromagnetic forces as a result of fault currents, the loosening of winding supports as a consequence of electric shocks or when the transformer is transported. These type of faults are mainly involved with the change in the geometry of the transfomer as a whole, a factor that alters the RLC parameters which represent the transformer, and therefore, its resonance points. The standard behavior of the three-phase three limbs transformer can be found in the literature. In this work, an analysis of the tests, which were applied in a double core transformer that is commoly used in arc furnaces, was carried out. The main feature of these transformers is that they feed high currents over a wide range of voltages.
频率响应分析(FRA)是诊断和检测变压器内部故障的绝佳工具,例如:由于故障电流引起的电磁力引起的位移和绕组变形,由于电击或变压器运输时绕组支架松动。这些类型的故障主要与变压器整体几何形状的变化有关,这一因素改变了代表变压器的RLC参数,因此也改变了它的谐振点。三相三肢变压器的标准性能可以在文献中找到。本文对电弧炉中常用的双芯变压器的试验结果进行了分析。这些变压器的主要特点是它们在很宽的电压范围内提供大电流。
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引用次数: 0
Caracterización de un holograma mediante el dopaje de un PDLC con violeta de genciana 用龙胆草紫掺杂PDLC表征全息图
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.562
M. O. Gutiérrez, Mario Pérez Cortés, J. Torres, Jorge Carlos Lugo Jiménez, Otilio Santos Aguilar, Maritza De Coss Gómez
Se propone la utilizacion de un dispositivo PDLC (Polymer Dispersed Liquid-Crystal) dopado con violeta de genciana para su utilizacion en el grabado de rejillas holograficas (H-PDLC). Se muestra el comportamiento de la eficiencia de difraccion de rejillas holograficas grabadas en un H-PDLC con un espesor de 10 µm. El proceso de grabado se lleva a cabo por la modulacion del indice de refraccion del H-PDLC al ser expuesto a un patron de luz. La eficiencia maxima que alcanza este dispositivo es del 5% medido en el orden 1 de difraccion. Este dispositivo promete ser un buen material para funcionar como alternativa de las peliculas holograficas.
提出了一种掺杂龙胆草紫的PDLC(聚合物分散液晶)装置,用于全息光栅(H-PDLC)的蚀刻。研究了在10µm厚的H-PDLC上记录的全息光栅的衍射效率行为。蚀刻过程是通过调节H-PDLC暴露在光模式下的折射率来完成的。在1阶衍射下,该装置达到的最大效率为5%。这种设备有望成为一种很好的材料,作为全息胶片的替代品。
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引用次数: 0
Exploración sísmica de refracción mediante ruido sísmico 利用地震噪声进行地震折射勘探
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.555
J. González, Mariana Guadalupe Heredia Martí­nez, Iván Granados Chavarrí­a
In this study, a seismic refraction profile was obtained using seismic noise records. The waveforms were recorded on a refraction line located west of Mexico City. The line consists of a linear array of 24 vertical geophones spaced 2 meters apart and a record length of 175 minutes. The virtual refraction profile was constructed from the cross-correlation of the seismic noise records from the 24 geophones. Each virtual refraction trace was obtained by stacking the correlations for all time windows between pairs of stations. In signal processing, different normalization applications were tested, with the aim of recovering the arrival of the P wave. Three seismic refraction profiles were calculated corresponding to virtual sources located in the center and ends of the line. To evaluate the recovery of the P waves acquired in this way, a spectral analysis of the cross correlations was performed to rule out the use of surface waves in synthetic seismograms. The virtual profiles obtained were compared with the conventional seismic refraction profiles, showing clearly the recovery of the first arrivals of the P wave, even improving the definition of the traces of conventional refraction. In addition, to complement the study, an F-K analysis was performed to discriminate surface waves and obtain only body waves.
在本研究中,利用地震噪声记录获得了地震折射剖面。这些波形是在墨西哥城以西的折射线上记录下来的。这条线由24个垂直检波器组成,间隔2米,记录长度为175分钟。利用24个检波器地震噪声记录的相互关系,构建了虚拟折射剖面。通过叠加台站间所有时间窗口的相关性,得到每个虚拟折射迹线。在信号处理中,测试了不同的归一化应用,目的是恢复P波的到达。计算了位于线中心和两端的虚拟震源对应的三个地震折射剖面。为了评估以这种方式获得的P波的恢复,对相互关系进行了频谱分析,以排除在合成地震图中使用表面波的可能性。将获得的虚拟剖面与常规地震折射剖面进行了比较,清楚地显示了P波首次到达的恢复,甚至改进了常规折射轨迹的定义。此外,为了补充研究,进行了F-K分析以区分表面波并仅获得体波。
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引用次数: 0
Geodesia aplicada al monitoreo de desplazamientos de una ladera inestable y la influencia de la precipitación, durante el período 2008-2011, Teziutlán, Puebla. 应用大地测量法监测不稳定斜坡的位移和降水的影响,teziutlan,普埃布拉。
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.559
Ángel Gómez Vázquez, Ana Teresa Mendoza Rosas
In October 1999, a landslide occurred in the neighborhood of La Aurora, TeziutlAin, state of Puebla, which resulted in the death of 130 people. During the period 2008-2011, a geodetic network was built on that slope to detect its movements, which is made up of 10 points on it and two remote control stations. In this period of time, we carried out 11 distance measurement campaigns with a total station. Negative displacements between -5 and -19 mm were detected in some points near the 1999 landslide crown, in the rest of the points, the displacement was very small. The displacement velocities are less than 7.3mm per year, which according to the classification of Cruden and Varnes (1996) would place them in level 1, as extremely slow. We calculate correlation coefficients between displacements and meteorological variables from a database of the National Water Commission (CONAGUA), the meteorological station is located near the landslide area, our results do not show significant correlations.
1999年10月,普埃布拉州特齐乌特兰的拉奥罗拉附近发生山体滑坡,造成130人死亡。在2008-2011年期间,在该斜坡上建立了一个大地测量网来检测其运动,该网络由斜坡上的10个点和两个远程控制站组成。在此期间,我们用全站仪进行了11次距离测量活动。在1999年滑坡冠附近的一些点检测到负位移在-5 ~ -19 mm之间,其余点的位移很小。位移速度小于7.3mm /年,根据Cruden和Varnes(1996)的分类,它们将其列为1级,即极慢。我们从国家水委(CONAGUA)的数据库中计算了位移与气象变量的相关系数,气象站位于滑坡区附近,我们的结果没有显示出显著的相关性。
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引用次数: 0
Tectónica y sismicidad en la Región Volcánica Paricutín - Tancítaro, Michoacán, México 墨西哥米却肯州paricutin - tancitaro火山地区的构造和地震活动
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.556
Daniel Alberto Gómez Calderón, Diana Cinthia Soria Caballero, Pedro Corona Chávez
Active tectonomagmatic regions are characterized for the presence of regional fault systems, as well as recurrent volcanism and seismicity. The Parícutin-Tancítaro Volcanic Region is located in the Michoacán-Guanajuato Volcanic Field on the central part of the Transmexican Volcanic Belt and represents a structurally complex zone with high volcanic density. This work presents a morphotectonic and seismicity analysis in the Parícutin-Tancítaro Volcanic Region. Here, we observe the coexistence of two regional fault systems: 1) the Cotija-Nueva Italia Fault System, which groups NW-SE oriented faults and fractures, and represent the limit between the Meseta P’urhépecha area to the north and the Peribán-Los Reyes Graben and the Bajo Balsas Basin to the south. 2) The Tepalcatepec-Tangancícuaro Fault System, which groups NE-SW oriented faults, including frequent volcanic lineaments with the same direction; this system influences the formation of the Peribán-Los Reyes Graben. The Parícutin-Tancítaro Region presents an intense seismic activity and is characterized by the record of at least 7 seismic swarms during the last 80 years. Independently the precision on the location and relatively occurrence depth of the seismic swarms, those overlap with the regional faults systems (previously mentioned) and with late Pleistocene, Holocene and recent volcanic lineaments (e.g. Parícutin volcano (1943-1952), Pedregal volcano (470-710), Astillero volcano (620-680), and Metate volcano (1000-1600)). The concurrence and recurrence of the three tectonomagmatic elements strongly suggest that the tectonic structures ease the ascension and emplacement of magmas, probably associated to shallow reservoirs to at depths of 4-5 km, 9-10 km and 14-17 km. This scenario carries inherent geological hazards related to volcanic and seismic activity, which could affect the communities settled in the region. Therefore, its necessary monitoring volcanic and seismic processes evolution in the Parícutin-Tancítaro Volcanic Region through geophysical techniques and permanent analysis of data. KeywoRds: vulcanotectonic, active fault, seismicity, Parícutin-Tancítaro, volcanic field. coRResPondencia de autoR: dagcbeto@gmail.com Ciencia Nicolaita Copyright, Universidad Michoacana de San Nicolás de Hidalgo. HistoRial del aRtículo Recibido: 6 de junio de 2021 Aceptado: 27 de julio de 2021 25 Ciencia Nicolaita No. 82, septiembre 2021
活跃的构造岩浆区以区域断裂系统的存在以及周期性的火山活动和地震活动为特征。Parícutin-Tancítaro火火区位于跨墨西哥火山带中部的Michoacán-Guanajuato火山田,是一个火山密度高的构造复杂带。本文介绍了Parícutin-Tancítaro火山区的形态构造和地震活动性分析。1) Cotija-Nueva Italia断裂系统,由NW-SE向断裂和断裂组成,是北至Meseta P ' urhsamucha地区与南至Peribán-Los Reyes地堑和Bajo Balsas盆地之间的分界线。2) Tepalcatepec-Tangancícuaro断裂系统,为NE-SW向断裂群,同一方向的火山构造频繁出现;该体系影响Peribán-Los雷耶斯地堑的形成。Parícutin-Tancítaro地区呈现强烈的地震活动,其特征是在过去80年中记录了至少7个地震群。独立于地震群的位置精度和相对发生深度,与区域断裂系统(前面提到的)以及与晚更新世、全新世和最近的火山构造(如Parícutin火山(1943-1952)、Pedregal火山(470-710)、Astillero火山(620-680)和Metate火山(1000-1600))重叠的地震群。三种构造岩浆元素的同时和重复强烈表明,构造构造缓解了岩浆的上升和侵位,可能与深度为4-5 km、9-10 km和14-17 km的浅层储层有关。这种情况带有与火山和地震活动有关的固有地质灾害,可能会影响在该地区定居的社区。因此,有必要通过地球物理技术和对资料的永久分析来监测Parícutin-Tancítaro火山区火山和地震过程的演变。关键词:火山构造,活动断裂,地震活动性,Parícutin-Tancítaro,火山场作者通信:dagcbeto@gmail.com Ciencia Nicolaita版权所有,米却阿卡纳大学Nicolás伊达尔戈。history del aRtículo Recibido: 2021年6月6日接收:2021年7月27日25《Nicolaita》第82期,2021年9月
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引用次数: 0
Aplicación de VolcFlow para simular Avalanchas de Escombros y CDP en los volcanes Popocatépetl, Volcán de Colima y Ceboruco 应用VolcFlow模拟popocatepetl火山、Colima火山和Ceboruco火山的碎石雪崩和CDP
Pub Date : 2021-09-14 DOI: 10.35830/CN.VI82.557
Enrique Cárdenas Sánchez, L. Gómez, Elis Olivia Rangel Flores, Oscar Dionicio Reyes Mendoza, Francisco Valencia Alcaraz
Volcanic hazard analysis makes it possible to quantify the potential risk from historical events in the social and economic context.  In the geographical context, Mexico has at least 38 volcanic centers, including monogenetic volcanoes and stratovolcanoes, which have presented explosive activity in the last 10 thousand years.  The main relevant are the PopocatA©petl volcano, VolcAin de Colima and the Ceboruco volcano. They have some similarities between them, such as presenting recent explosive and effusive activity and being located on high population density in its surroundings and therefore, a high degree of vulnerability.  On the one hand, the Ceboruco volcano has presented at least 8 eruptions including the last since 1870. Moreover, VolcAin de Colima and the PopocatA©petl volcano have been two of the most active volcanoes in Mexico with frequent emplacement and destruction of lava domes in the last 20 years causing preventive evacuation by the corresponding authorities. We used the VolcFlow app written by MATLAB to solve conservation of mass and momentum equations.  Considering the above, this article shows the result of hazard analysis of various events such as lahars, pyroclastic flows, and avalanche debris with a mitigating risk approach from volcanic hazard. The results allow us to make effective modifications in the rheological parameters that are characteristic for each type of event in each volcano considering the characteristics such as the flux density, viscosity, volume of material emitted and Digital Elevation Model.
火山灾害分析使量化历史事件在社会和经济背景下的潜在风险成为可能。在地理上,墨西哥至少有38个火山中心,包括单生火山和层状火山,它们在过去的一万年里呈现出爆炸性的活动。主要有PopocatA©petl火山、VolcAin de Colima火山和Ceboruco火山。它们之间有一些相似之处,例如最近出现爆炸性和涌出性活动,并且位于其周围人口密度高的地区,因此具有高度脆弱性。一方面,塞博鲁科火山已经出现了至少8次喷发,包括1870年以来的最后一次。此外,科利马火山和波波卡塔©佩特尔火山是墨西哥最活跃的两座火山,在过去20年里,熔岩圆顶经常被安置和破坏,导致有关当局进行预防性疏散。我们使用MATLAB编写的VolcFlow应用程序来求解质量守恒方程和动量方程。考虑到上述情况,本文展示了用减轻火山灾害风险的方法对火山泥流、火山碎屑流和雪崩碎屑等各种事件进行危害分析的结果。考虑到通量密度、粘度、喷出的物质体积和数字高程模型等特征,研究结果使我们能够有效地修改每个火山中每种类型事件的流变参数。
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引用次数: 0
Governos locais pelo Pacto Global para a Migração: iniciativas europeia e sul-americana em paradiplomacia municipal face aos limites jurídicos domésticos e internacionais 全球移民契约的地方政府:面对国内和国际法律限制的欧洲和南美市政辅助外交倡议
Pub Date : 2021-04-21 DOI: 10.14295/CN.V2I3.12313
Joséli Fiorin Gomes
The UN General Assembly approved the Global Compact for Migration, a non-binding agreement to improve international cooperation to mitigate the negative impacts of irregular migration. Despite this, many of the voting countries soon withdrew from the Compact. However, local governments in several of these countries, by paradiplomacy, have supported the UN agenda on migration, in contrast to the positions of States. In this sense, the work aims to identify and examine what are the initiatives, in municipal paradiplomacy, regarding human mobility, in South America and Europe, which are in line with the Compact ́s proposals. It is inquired which basis can legitimize them, pointing out the role attributed to local governments by the UN in its current  Doutora em Direito pela Universidade Federal do Rio Grande do Sul (UFRGS). Professora permanente do Programa de Pós-graduação em Relações Internacionais (PPGRI) e professora adjunta do Departamento de Direito da Universidade Federal de Santa Maria (UFSM). Campos Neutrais – Revista Latino-Americana de Relações Internacionais Vol. 2, No 3, Setembro–Dezembro de 2020. Santa Vitória do Palmar – RS. 73 agenda, aiming to investigate the legal obstacles, in international and domestic scope, put to these initiatives for the local realization of the said international agreement.
联合国大会批准了《全球移民契约》,这是一项不具约束力的协议,旨在加强国际合作,减轻非正常移民的负面影响。尽管如此,许多有投票权的国家很快退出了《契约》。然而,与各国的立场相反,其中一些国家的地方政府通过准外交支持联合国的移民议程。从这个意义上说,这项工作的目的是确定和审查南美洲和欧洲的市政准外交中关于人口流动的倡议,这些倡议符合《契约》的建议。有人询问哪一种依据可以使它们合法化,并指出联合国在其目前的南里奥格兰德州联邦大学(UFRGS)中赋予地方政府的作用。Pós-graduação em Relações国际项目常任教授(PPGRI)和圣玛丽亚联邦大学(UFSM)系主任管理教授。中立性教育-拉丁美洲评论Relações国际信息,第2卷,第3期,2020年9月- 10月。Santa Vitória do Palmar - RS. 73议程,旨在调查国际和国内范围内的法律障碍,为当地实现上述国际协议提出这些倡议。
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引用次数: 0
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Computer Networks and ISDN Systems
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