Illawarra labour force trends

This e-brief, which is part of a series relating to all NSW regions, sets out key labour force trends for the residents of the Illawarra region. Data has been sourced from the Australian Bureau of Statistics’ (ABS) monthly Labour Force Survey. The ABS divides NSW into 28 regions; 15 in Greater Sydney and 13 in Regional NSW. Covered are four key labour force indicators: Employment (full-time and part-time); The participation rate; The unemployment rate; and The youth unemployment rate. A map of the Illawarra region is included at the end of the e-brief. The map also shows the NSW electorates located wholly or partly within the region. The e-brief finishes with a short section on labour force definitions and methodological notes

Hunter Valley labour force trends

This e-brief, which is part of a series relating to all NSW regions, sets out key labour force trends for the residents of the Hunter Valley region. Data has been sourced from the Australian Bureau of Statistics’ (ABS) monthly Labour Force Survey. The ABS divides NSW into 28 regions; 15 in Greater Sydney and 13 in Regional NSW. Covered are four key labour force indicators: Employment (full-time and part-time); The participation rate; The unemployment rate; and The youth unemployment rate. A map of the Hunter Valley region is included at the end of the ebrief. The map also shows the NSW electorates located wholly or partly within the region. The e-brief finishes with a short section on labour force definitions and methodological notes.&nbsp

Estudio de la composición y las propiedades mecánicas de los elementos de unión elaborados en guadua para estructuras poliédricas de puentes y otras aplicaciones

La presente investigación consistió en desarrollar y definir un elemento hecho principalmente a base de guadua, que pudiera resistir con las solicitaciones de carga presentes en estructuras poliédricas, más específicamente en un puente peatonal que se construirá en la Universidad Tecnológica de Pereira. Por tal motivo, se debió comenzar tomando como base investigaciones previas realizadas en la universidad sobre propiedades físico-mecánicas de la Guadua para todo el proceso de diseño, probando inclusive el material de refuerzo que deberá llevar por dentro la guadua para proporcionar una mayor resistencia al elemento de unión y poder soportar los esfuerzos del puente y compensar las debilidades de ésta. (Material hueco por dentro) El proceso de investigación se desarrolló de manera sistemática, empezando por el estudio y definición del material de refuerzo, probando diferentes tipos de materiales compuestos y verificando sus propiedades físico-mecánicas a través de pruebas de laboratorio. Una vez se tuvo definido la composición exacta del material de refuerzo, se procedió a realizar el diseño detallado del elemento de unión hecho en guadua, definiendo aspectos como su forma, tamaño, accesorios, configuración y que debería llevar por dentro el material seleccionado anteriormente; igual que con el material de refuerzo, se realizaron pruebas de laboratorio para obtener los resultados que este prototipo del elemento de Guadua puede proporcionar, de esta manera se realizaron modificaciones de diseño para aumentar la resistencia mecánica de este hasta lograr un resultado aceptable para ser utilizado en puentes peatonales

Noether-Lefschetz Theory in Toric Varieties

In 1994 Batyrev and Cox proved the "Lefschetz hyper-surface theorem" for toric varieties, which claims that for a quasi-smooth hyper-surface $X={f=0}$ in a complete simplicial toric variety $Pj^{2k+1}_{Sigma}$ the morphism $i^*:H^p(Pj_{Sigma}) ightarrow H^p(X)$ induced by the inclusion, is injective for $p=2k$ and an isomorphism for p<2k. This allows us to define $NL_{eta}$, the main geometrical object of this work, the locus of quasi-smooth hypersurfaces of degree $eta$ such that $i^*$ is not an isomorphism. Following the tradition we call it in cite{bm} the Noether-Lefschetz locus, while some authors call it Hodge loci when $Pj^{2k+1}_{Sigma}=Pj^{2k+1}$. This is a interesting geometrical object since it is the locus where the Hodge Conjecture is unknown. The cornerstone of this thesis, a Noether-Lefschetz theorem, is a consequence of "the infinitesimal Noether-Lefschetz theorem" namely, Bruzzo and Grassi in 2012 showed that if the multiplication $R(f)_{eta}otimes R(f)_{keta-eta_0} ightarrow R(f)_{(k+1)eta-eta_0}$ is surjective, where $eta_0$ is the class of the anticanonical divisor of $Pj^{2k+1}_{Sigma}$, the Noether-Lefschetz locus is non-empty and each irreducible component has positive codimension. We prove in Chapter 2 that if $keta-eta_0=neta$ $(ninN)$ where $eta$ is the class of an ample, primitive and $0$-regular divisor and $eta$ is $0$-regular with respect to $eta$, then every irreducible component $N$ of the Noether-Lefschetz locus respect to $eta$ satisfies $n+1leq codim N leq h^{k-1,k+1}(X)$. The lower bound generalize to higher dimensions some of the work of Green , Voisin and Lanza and Martino and the upper bound extend some results of Bruzzo and Grassi in 2018. In Chapter 3, continuing the study of the Noether-Lefschetz components, we prove that asymptotically the components whose codimension is bounded from above are made of hypersurfaces containing a small degree $k$-dimensional subvariety $V$. As a corollary we get an asymptotic characterization of the components of small codimension, generalizing the work of Otwinowska in 2003 for $Pj_{Sigma}^{2k+1}=Pj^{2k+1}$, Green and Voisin for $Pj_{Sigma}^{2k+1}=Pj^3$. Finally in chapter 4 we prove asymptotically the Hodge Conjecture when $V$ as before is smooth complete intersection. We also prove that on a very general quasi-smooth intersection subvariety in a projective simplicial toric variety the Hodge conjecture holds. We end this work with a natural and different extension of the Noether-Lefschetz loci. Some tools that have been developed in the thesis are a generalization of Macaulay theorem for Fano, irreducible normal varieties with rational singularities, satisfying a suitable additional condition, and an extension of the notion of Gorenstein ideal to toric varieties

p-Integrality of canonical coordinate

Let $L=\delta^n+\sum_{i=0}^{n-1}a_i(z)\delta^i$ be a differential operator with coefficients in $\mathbb{Q}(z)$ of order $n\geq2$, where $\delta=z d/dz$. Suppose that $L$ has maximal unipotent monodromy at zero. In this paper we give a sufficient condition for the canonical coordinate of $L$ belongs to $\mathbb{Z}_p[[z]]$. This sufficient condition relies on the notion of Frobenius structure. As a consequence of the main result we prove that if $n=4$ and $L$ is an irreducible Picard-Fuchs equation with maximal unipotent monodromy at zero having a strong B-incarnation, then there is an integer $N>0$ such that the canonical coordinate of $L$ belongs to $\mathbb{Z}[1/N][[z]]$

Geometría dinámica: de la visualización a la prueba

La visualización juega un papel importante en el proceso de prueba, no fundamental, pero que cognitivamente contribuye a facilitar la búsqueda de soluciones en una tarea geométrica. En esta investigación se busca entregar una sugerencia de cómo promover el razonamiento geométrico en el aula por medio de la Geometría Dinámica. Se quiere intencionar el tránsito, desde la visualización a la prueba, a través de un diseño de secuencia de enseñanza, realzando este artefacto tecnológico en dicho tránsito y así, finalmente evidenciar una propuesta en los paradigmas geométricos de Kuzniak, apuntando a mejorar la enseñanza de la Geometría por medio de dicha articulación. Las actividades propuestas en el diseño invitan a los estudiantes a la exploración, inferencias, conjeturas, justificaciones, entre otras, logrando así un mayor razonamiento geométrico

Detection of Communities within the Multibody System Dynamics Network and Analysis of Their Relations

Multibody system dynamics is already a well developed branch of theoretical, computational and applied mechanics. Thousands of documents can be found in any of the well-known scientific databases. In this work it is demonstrated that multibody system dynamics is built of many thematic communities. Using the Elsevier’s abstract and citation database SCOPUS, a massive amount of data is collected and analyzed with the use of the open source visualization tool Gephi. The information is represented as a large set of nodes with connections to study their graphical distribution and explore geometry and symmetries. A randomized radial symmetry is found in the graphical representation of the collected information. Furthermore, the concept of modularity is used to demonstrate that community structures are present in the field of multibody system dynamics. In particular, twenty-four different thematic communities have been identified. The scientific production of each community is analyzed, which allows to predict its growing rate in the next years. The journals and conference proceedings mainly used by the authors belonging to the community as well as the cooperation between them by country are also analyzed

On the Use of the p-q Theory for Harmonic Current Cancellation with Shunt Active Filters

Discussion and mathematical proof on necessary and sufficient conditions for the application of the {p-q} theory for compensating the harmonic currents consumed by non-linear load using a shunt active filter are presented. These conditions over instantaneous active and reactive powers were not addressed before and must be considered on the design of new control strategies based on {p-q} theory. Theoretical demonstration is proposed and an application example with simulations results is used to validate the theoretical results

El memristor, aplicaciones circuitales con amplificadores operacionales

En esencia un elemento de circuito pasivo es un componente de vital importancia en el diseño de circuitos eléctricos y electrónicos, pues es el medio por el cual la energía interactúa en forma de almacenamiento o absorción. Se disponen de tres elementos básicos en la teoría clásica de circuitos los cuales son llamados el capacitor (descubierto en 1745), el resistor (descubierto en 1827) y el inductor (descubierto en 1831), pero en el año de 1971 un profesor de ingeniería eléctrica de la universidad de California, Berkeley predijo la existencia de un cuarto dispositivo fundamental, llamado el memristor comprobando que no era posible crear un duplicado de este elemento con la combinación de los otros tres dispositivos, por lo tanto, según dicha aseveración el memristor es un dispositivo fundamental. El presente trabajo está enfocado en brindar una breve visión de las aplicaciones, comportamientos, modelado matemático y adecuación de amplificadores operacionales a la tarea de estudiar la interacción dinámica de este dispositivo de dos terminales hacia usos menos teorizados con una proyección practica más amplia encaminado al beneficio de estudiantes que se hallen interesados en investigar al memristor como nueva tecnología

Candida albicans UBI3 and UBI4 promoter regions confer differential regulation of invertase production to Saccharomyces cerevisiae cells in response to stress

Candida albicans ubiquitin genes UBI3 and UBI4 encode a ubiquitin-hybrid protein involved in ribosome biogenesis and polyubiquitin, respectively. In this work we show that UBI3 and UBI4 promoter regions confer differentialexpr ession consistent with the function of their encoded gene products. Hybrid genes were constructed containing the SUC2 coding region under the controlof UBI3 or UBI4 promoters in the yeast vector pLC7. Invertase production in Saccharomyces cerevisiae transformants was differentially regulated: the UBI4 promoter was induced by stress conditions (thermalupshift and/or starvation) whereas the UBI3 promoter conferred constitutive invertase production in growing yeast cells. These results indicate that the UBI4 promoter is regulated by stress-response signaling pathways, whereas the UBI3 promoter is controlled according to the requirement for protein synthesis to support cell growth.Gozalbo Flor, Daniel, [email protected]