TecnoLogicas最新文献

MindFluctuations: Poetic, Aesthetic and Technical Considerations of a Dance Spectacle Exploring Neural Connections 思维波动：探索神经联系的舞蹈奇观的诗意、美学和技术思考

TecnoLogicas Pub Date : 2018-01-15 DOI: 10.22430/22565337.728

Tania Fraga

{"title":"MindFluctuations: Poetic, Aesthetic and Technical Considerations of a Dance Spectacle Exploring Neural Connections","authors":"Tania Fraga","doi":"10.22430/22565337.728","DOIUrl":"https://doi.org/10.22430/22565337.728","url":null,"abstract":"En esta era de co-evolucion de los seres humanos y las computadoras estamos presenciando mucho miedo de que la humanidad pierda el control y la autonomia. Esta es una posibilidad. Otro es el desarrollo de sistemas simbioticos entre el hombre y las maquinas. Para lograr este objetivo es necesario investigar formas de aplicar algunos conceptos clave capaces de tener un efecto catalizador sobre tales ideas. Al discutir esta posibilidad a traves del estudio de caso del espectaculo MindFluctuations, una obra experimental que explora las conexiones neuronales, estamos buscando formas de desarrollarlas discutiendo este caso particular desde su concepcion hasta su realizacion. Tambien establece un proceso de reflexion sobre el diseno, desarrollo y produccion de este espectaculo de danza. Esta obra de arte utiliza una aplicacion personalizada, NumericVariations, para explorar las conexiones neuronales citadas para espectaculos, actuaciones e instalaciones especificas del sitio. Su enfoque fue posible gracias a la reciente investigacion en neurociencia y al desarrollo de una Interfaz de Computadora Cerebral (BCI) integrada con un marco de realidad virtual, que permitio que surgiera una obra experimental de realidad virtual interactiva. Un casco neuronal, conectado a la computadora y entrelazado con procedimientos matematicos, propicio una simbiosis de seres humanos con computadoras","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45378243","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

Art, science and technology, brief reflections on interdisciplinary work 艺术、科学和技术，对跨学科工作的简要思考

TecnoLogicas Pub Date : 2018-01-15 DOI: 10.22430/22565337.742

Wilson J. Sarmiento, Santiago Mesa-Romero

引用次数: 1

Efecto de la concentración de magnetita en la estructura, propiedades eléctricas y magnéticas de un material compuesto a base de resina de poliéster 磁铁矿浓度对聚酯树脂复合材料结构、电学和磁性性能的影响

TecnoLogicas Pub Date : 2018-01-15 DOI: 10.22430/22565337.708

G. Peña-Rodríguez, Paola A. Rivera-Suárez, César H. González-Gómez, C. A. Parra-Vargas, A. O. Garzón-Posada, David A. Landínez-Téllez, J. Roa-Rojas

{"title":"Efecto de la concentración de magnetita en la estructura, propiedades eléctricas y magnéticas de un material compuesto a base de resina de poliéster","authors":"G. Peña-Rodríguez, Paola A. Rivera-Suárez, César H. González-Gómez, C. A. Parra-Vargas, A. O. Garzón-Posada, David A. Landínez-Téllez, J. Roa-Rojas","doi":"10.22430/22565337.708","DOIUrl":"https://doi.org/10.22430/22565337.708","url":null,"abstract":"This study reports the effect of the concentration of magnetite powders (Fe3O4) on the electrical and magnetic properties of a resin-based composite of thermoset polyester. The samples were prepared by the casting method at different concentrations: 60-40, 70-30, 80-20, 90-10 and 100-0 (% in weight), where the primary phase was resin and the secondary, Fe3O4 powders. The crystalline structure was studied using X-ray diffraction and surface characterization was carried out applying the scanning electron microscopy technique. The electrical response was measured by electric polarization curves as a function of the electric field; and the volumetric electrical resistivity, by an electrometer. The magnetic response was determined by magnetization curves as a function of temperature and intensity of the applied magnetic field. The structural analysis indicates that crystallinity increases as higher concentrations of Fe3O4 are added to the samples. The electrical characterization of the material reveals that the volumetric resistivity decreases as the content of magnetite increases. These reactions indicate an insulation-conductor transition with increasing dielectric constant values. The magnetic characterization presents a linear increase of the saturation of magnetization and magnetic moment as a function of the amount of magnetite added to the polymer matrix, whereas the coercivity shows behaviors of soft magnetic materials for T ˃ Tv and for T < Tv, where Tv represents the temperature of Verwey.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48447589","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

Detecting atypical functioning of emotional processing in Colombian ex-combatants 检测哥伦比亚前战斗人员情绪处理的非典型功能

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.710

Mónica Rodríguez-Calvache, Andrés Quintero-Zea, Sandra P. Trujillo-Orrego, N. Trujillo-Orrego, José David López-Hincapié

引用次数: 5

CO, Pb ++ and SO2 effects on L-type calcium channel and action potential in human atrial myocytes. In silico study CO、Pb++和SO2对人心房肌细胞L型钙通道和动作电位的影响。计算机研究

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.718

Diana C. Pachajoa, C. Tobón, J. P. Ugarte, J. Saiz

引用次数: 1

Advances in biomedical engineering: a call for enhancing empirical research 生物医学工程的进展:呼吁加强实证研究

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.741

A. Orozco-Duque, D. Novák

引用次数: 1

Neurosurgery and brain shift: review of the state of the art and main contributions of robotics 神经外科和脑转移：机器人技术的现状和主要贡献综述

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.719

Karin Correa-Arana, Ó. A. Vivas-Albán, J. Sabater-Navarro

{"title":"Neurosurgery and brain shift: review of the state of the art and main contributions of robotics","authors":"Karin Correa-Arana, Ó. A. Vivas-Albán, J. Sabater-Navarro","doi":"10.22430/22565337.719","DOIUrl":"https://doi.org/10.22430/22565337.719","url":null,"abstract":"Este articulo presenta una revision acerca de la neurocirugia, los asistentes roboticos en este tipo de procedimiento, y el tratamiento que se le da al problema del desplazamiento que sufre el tejido cerebral, incluyendo las tecnicas para la obtencion de imagenes medicas. Se abarca de manera especial el fenomeno del desplazamiento cerebral, comunmente conocido como brain shift, el cual causa perdida de referencia entre las imagenes preoperatorias y los volumenes a tratar durante la cirugia guiada por imagenes medicas. Hipoteticamente, con la prediccion y correccion del brain shift sobre el sistema de neuronavegacion, se podrian planear y seguir trayectorias de minima invasion, lo que conllevaria a minimizar el dano a los tejidos funcionales y posiblemente a reducir la morbilidad y mortalidad en estos delicados y exigentes procedimientos medicos, como por ejemplo, en la extirpacion de un tumor cerebral. Se mencionan tambien otros inconvenientes asociados a la neurocirugia y se muestra como los sistemas robotizados han ayudado a solventar esta problematica. Finalmente se ponen en relieve las perspectivas futuras de esta rama de la medicina, la cual desde muchas disciplinas busca tratar las dolencias del principal organo del ser humano.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47384807","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: 3

Flujo de potencia óptimo para redes radiales y enmalladas empleando programación semidefinida 采用半定规划的径向网络和网状网络的最优功率流

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.703

O. D. Montoya-Giraldo, Walter Gil-González, Alejandro Garcés-Ruiz

引用次数: 10

Feature extraction based on time-singularity multifractal spectrum distribution in intracardiac atrial fibrillation signals 基于时间奇点多重分形谱分布的心内房颤信号特征提取

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.716

R. D. Urda-Benitez, A. E. Castro-Ospina, A. Orozco-Duque

{"title":"Feature extraction based on time-singularity multifractal spectrum distribution in intracardiac atrial fibrillation signals","authors":"R. D. Urda-Benitez, A. E. Castro-Ospina, A. Orozco-Duque","doi":"10.22430/22565337.716","DOIUrl":"https://doi.org/10.22430/22565337.716","url":null,"abstract":"Non-linear analysis of electrograms (EGM) has been proposed as a tool to detect critical conduction sites (e.g., rotors vortex, multiple wavefronts) in atrial fibrillation (AF). Likewise, studies have shown that multifractal analysis is useful to detect critical activity in EGM signals. However, the multifractal spectrum does not consider the temporal information. There is a new mathematical formalism to overcome this limitation: the time-singularity multifractal spectrum distribution (TS-MFSD), which involves the time variation of the spectrum. In this manuscript, we describe the methodology to compute the TS-MFSD from EGM signals. Moreover, we propose a methodology to extract features from time-singularity spectrum and from singularity energy spectrum (SES). We tested the features in an EGM database labeled by experts as: non-fragmented, discrete fragmented potentials, disorganized activity, and continuous activity. We tested the area under the receiver operating characteristic (ROC) curve. The proposed features achieve an area under the ROC curve of 95.17% when detecting signals with continuous activity. These results outperform those reported using multifractal analysis. To our knowledge, this is the first work that report the use of TS-MFSD in biomedical signals and our findings suggest that time-singularity has the potential to be used in the study of non-stationary behavior of EGM signals in AF.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42057343","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: 4

Propiedades Piezoeléctricas del Pentóxido de Niobio y Pentóxido de Tantalio: un estudio desde primeros principios 五氧化二铌和五氧化二钽的压电性能：从早期开始的研究

TecnoLogicas Pub Date : 2017-09-04 DOI: 10.22430/22565337.704

Olga M. Giraldo-Giraldo, Santiago Perez-Walton, Jorge M. Osorio-Guillén

{"title":"Propiedades Piezoeléctricas del Pentóxido de Niobio y Pentóxido de Tantalio: un estudio desde primeros principios","authors":"Olga M. Giraldo-Giraldo, Santiago Perez-Walton, Jorge M. Osorio-Guillén","doi":"10.22430/22565337.704","DOIUrl":"https://doi.org/10.22430/22565337.704","url":null,"abstract":"espanolNb2O5 y Ta2O5 son oxidos semiconductores de brecha ancha, los cuales en los ultimos anos han despertado gran interes debido a sus multiples aplicaciones tecnologicas, ya sea en electronica, telecomunicaciones o fotocatalisis. Por estas razones, en este trabajo presentamos un estudio a partir de calculos de primeros principios de las propiedades piezoelectricas de las fases Z y β de Ta2O5, y de las fases Z y P de Nb2O5 utilizado la teoria de los funcionales de la densidad y la aproximacion del gradiente, generalizado con la parametrizacion PBEsol. Una vez determinada la geometria de equilibrio para cada una de estas fases, realizamos un calculo utilizando respuesta lineal para determinar el tensor piezoelectrico asociado a cada una de estas fases, encontrando que la fase Z para ambos compuestos presenta una buena respuesta piezoelectrica. Adicionalmente, encontramos que la fase β-Ta2O5 no presenta respuesta piezoelectrica. EnglishNb2O5 and Ta2O5 are wide-bandgap semiconductor oxides that have attracted great interest in recent years due to their technological applications, such as in electronics, telecommunications or photocatalysis. Because of this, we present a study based on first-principles calculations of the piezoelectric properties of the Z and β phases of Ta2O5 as well as the Z and P phases of Nb2O5 by using the Density Functional Theory and the Generalized Gradient Approximation with PBEsol parameterization. Once the equilibrium geometry was determined for each of these phases, we made a calculation using the linear response theory to determine the piezoelectric tensor associated with each phase. We discovered that the Z phase of both compounds presents good piezoelectric response. Additionally, β-Ta2O5 does not show such response.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49267509","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