Cosmic web alignments with the shape, angular momentum and peculiar velocities of dark matter haloes

We study the alignment of dark matter haloes with the cosmic web characterized by the tidal and velocity shear fields. We focus on the alignment of their shape, angular momentum and peculiar velocities. We use a cosmological N-body simulation that allows to study dark matter halos spanning almost five orders of magnitude in mass ($10^{9}$-$10^{14}$) $h^{-1}$$M_{\odot}$ and spatial scales of $(0.5$-$1.0)$ $h^{-1}$ Mpc to define the cosmic web. We find that the halo shape presents the strongest alignment along the smallest tidal eigenvector, e.g. along filaments and walls, with a signal that gets stronger as the halo mass increases. In the case of the velocity shear field only massive halos $>10^{12}$ $h^{-1}$$M_{\odot}$ tend to have their shapes aligned along the largest tidal eigenvector; that is, perpendicular to filaments and walls. For the angular momentum we find alignment signals only for halos more massive than $10^{12}$ $h^{-1}$$M_{\odot}$ both in the tidal and velocity shear webs where the preferences are for it to be parallel to the middle eigenvector; perpendicular to filaments and parallel to walls. Finally, the peculiar velocities show a strong alignment along the smallest tidal eigenvector for all halo masses; halos move along filaments and walls. In the velocity shear the same alignment is present but weaker and only for haloes less massive than $10^{12}$ $h^{-1}$$M_{\odot}$. Our results clearly show that the two different algorithms we used to define the cosmic web describe different physical aspects of non-linear collapse and should be used in a complementary way to understand the effect of the cosmic web on galaxy evolution.Comment: 14 pages, 5 figures, MNRAS accepte

NTA-IOT: A FLEXIBLE AND MODULAR ARCHITECTURE FOR IOT APPLICATIONS

This work introduces the NTA-IoT, an abstract IoT architecture that is intended to be flexible and modular, in order to serve as a generic guide tool for developing IoT projects. The model is composed of two types of layers: base layers and support layers, with each layer providing a particular service in the IoT infrastructure. Some considerations and possible roles for building IoT projects following the NTA-IoT architecture are also detailed. Finally, this paper presents an example of a concrete implementation of the architecture on a home automation problem, based on the use of different technologies such as KNX, MQTT and the Outsystems platform to build a functional end-to-end IoT project. The correct functioning of this implementation shows that the architecture is, in fact, consistent and well-suited to serve as strategic guide to carry IoT projects with satisfactory results. Although the case study presented in this work is applied to home automation, the framework is hoped to be applicable to any type of project

Vaca pa’ la Vaca

Trabajo de síntesisEs una nueva alternativa de inversión en el sector Ganadero de Colombia, permite ser parte de una comunidad con excedentes de liquidez a partir de un monto mínimo de $150.000 pesos equivalente a una unidad, los cuales podrán ser negociados en nuestra plataforma.INTRODUCCIÓN E INFORMACIÓN GENERAL RESUMEN EJECUTIVO 1. DESCRIPCIÓN DEL PROYECTO DE INNOVACIÓN FINANCIERA CON BASE TECNOLÓGICA Y SOCIAL 2. OBJETIVOS DE VACA PA` LA VACA 3. INFORMACIÓN PRODUCTOS FINANCIEROS 4. ENCUESTA 5. ENTREVISTA 6. PLANEACIÓN ESTRATÉGICA 7. CONCEPTO DEL PRODUCTO, SERVICIO/MEJORA O FORTALECIMIENTO 8. LOGO VACA PA´ LA VACA 9. ESTUDIO DE MERCADO 10. FORMULACIÓN DEL MODELO DE NEGOCIO - PRODUCTO MÍNIMO VIABLE 11. ESTUDIO TÉCNICO 12. ESTUDIO ECONÓMICO Y FINANCIERO 13. ESTUDIO SOCIAL Y AMBIENTAL 14. NORMATIVIDAD 15. CONCLUSIONES 16. AGRADECIMIENTOS BIBLIOGRAFÍA ANEXOSEspecializaciónEspecialista en Formulación y Evaluación Social y Económica de Proyecto

Scaling of the elastic contribution to the surface free energy of a nematic on a sawtoothed substrate

We characterize the elastic contribution to the surface free energy of a nematic in presence of a sawtooth substrate. Our findings are based on numerical minimization of the Landau-de Gennes model and analytical calculations on the Frank-Oseen theory. The nucleation of disclination lines (characterized by non-half-integer winding numbers) in the wedges and apexes of the substrate induces a leading order proportional to qlnq to the elastic contribution to the surface free energy density, q being the wavenumber associated with the substrate periodicity.Comment: 7 pages, 6 figures, accepted for publication in Physical Review

Desarrollo autosostenible de la implementación de la construcción de la Escuela Porvenir en la utilización de material reciclable

Trabajo de InvestigaciónEl proyecto se basa en el diseño para la construcción de una escuela usando materiales reciclables los cuales son de gran ayuda ya que es un sistema económico y puede ser implantado en la población de bajos recursos.PregradoIngeniero Civi

Plasticity in organic composition maintains biomechanical performance in shells of juvenile scallops exposed to altered temperature and pH conditions

This study was funded by PIA ANID ACT 172037 for international collaborative research among Chile (NAL, MAL, JV, CG-H, CD) and Spain (ARN, CG). Author also acknowledges support from Fondecyt 1190444 (MAL), Fondecyt 1210171 (CAV) and ANID - Millennium Science Initiative Program - ICN2019_015 (SECOS) (NAL, MAL and CAV). ANID doctoral scholarhip #21210012 to SB. ANID PFCHA / Doctorados Becas Chile Chile/2019-CEL00011051 to AA-O and DICYT from USACH to AA-O and CG-H during the execution of sample processing and analysis. We also acknowledge to Anita Quiroga, Jhonny Rojas for their support in lab procedures, and the staff at BIO-CT Lab (Universidad de Chile). We are grateful to B. Broitman and two anonymous reviewers who provided valuable comments on previous version of the manuscript.The exposure to environmental variations in pH and temperature has proven impacts on benthic ectotherms calcifiers, as evidenced by tradeoffs between physiological processes. However, how these stressors affect structure and functionality of mollusk shells has received less attention. Episodic events of upwelling of deep cold and low pH waters are well documented in eastern boundary systems and may be stressful to mollusks, impairing both physiological and biomechanical performance. These events are projected to become more intense, and extensive in time with ongoing global warming. In this study, we evaluate the independent and interactive effects of temperature and pH on the biomineral and biomechanical properties of Argopecten purpuratus scallop shells. Total organic matter in the shell mineral increased under reduced pH (~ 7.7) and control conditions (pH ~ 8.0). The periostracum layer coating the outer shell surface showed increased protein content under low pH conditions but decreasing sulfate and polysaccharides content. Reduced pH negatively impacts shell density and increases the disorder in the orientation of calcite crystals. At elevated temperatures (18 °C), shell microhardness increased. Other biomechanical properties were not affected by pH/ temperature treatments. Thus, under a reduction of 0.3 pH units and low temperature, the response of A. purpuratus was a tradeoff among organic compounds (biopolymer plasticity), density, and crystal organization (mineral plasticity) to maintain shell biomechanical performance, while increased temperature ameliorated the impacts on shell hardness. Biopolymer plasticity was associated with ecophysiological performance, indicating that, under the influence of natural fluctuations in pH and temperature, energetic constraints might be critical in modulating the long-term sustainability of this compensatory mechanism.PIA ANID ACT 172037Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1190444 1210171ANID - Millennium Science Initiative Program ICN2019_015ANID doctoral scholarhip 21210012ANID PFCHA / Doctorados Becas Chile Chile/2019-CEL0001105

ERGOLETRÍAS

Revista ErgoletríasAño 6. No. 6 Semestre B de 2019ISSN: 2322-9977RectorOmar Albeiro Mejia PatiñoVicerrectora AcadémicaMiría Bianney BermúdezCardonaVicerrector DesarrolloHumanoEnrique Alirio Ortiz GuizaDirector IDEADCarlos Arturo GamboaBobadillaSecretaría AcadémicaIDEADMarien Alexandra Gil SernaErgoletríasDirectorNelson Romero GuzmánCoordinador EditorialOmar Alejandro GonzálezComité Editorial de laUniversidadHernán RuizCarlos Arturo GamboaBobodillaJorge Ladino Gaitán BayonaElmer HernándezApoyo Editorial NacionalCristo Rafael Figueroa(Universidad Javeriana)Carlos Fajardo Fajardo(Universidad Pedagógica Nal.)Carlos A. Castrillón(Universidad del Quindío)Apoyo Editorial InternacionalFredy Yezzed López Varón(Argentina)Diseño e Impresión:Colors Editores S.A.S.500 ejemplaresImágenes tomadas de la WEBSuministradas por el Auto

CONTENIDO

ENSAYOArte y cultura en la obra de Friedrich NietzscheMilton Fernando DionisioLa sonrisa de SísifoSergio QuinteroFragmentos (inconclusos) sobre lectura, alteridad ynovelaAlex Silgado RamosConciencia trágica de la poesíaÁlvaro MarínConmoción poética e impugnación del nazismo en La batalla,escenas de Alemania, de Heiner MüllerJorge Ladino Gaitán BayonaYinca Shonibare, MBE: y la cita al Rococó en Mr. & Mrs.Andrews (sin la cabeza) (1998) y The Swing (after Fragonard)(2001)Albeiro AriasTres chispa zos alrededor del fuegoMaycol Estiben Pinzón BarragánJuan José León GómezAngie PradaGarcía Márquez, heredero de melancolíasPatricia PenagosPOETAS DEL ESPERANTOCinco poetas en esperantoCarlos A. CastrillónCREACIÓNBestiario en Cartagena. Varios autoresMinificcionesYurany Muriel LuengasLuis Vega, antes y después de Fuiste malaDavid LaraCINE Y LIBROSPelícula El baile rojoLuis RozoSubversión del haiku en Nuevas lecciones de anatomía, deJorge Ladino GaitánLibardo Vargas CelemínAntología poética e Luis Fernando MejíaCarlos A. CastrillónLa oscuridad del oficio: una luz que se proyecta tras lasombraSergio QuinteroPoesia sobre la violencia en colombiaNelson Romero Guzmá