Combining Bluetooth Mesh and KNX : the best of both worlds

Bluetooth Mesh (BT Mesh) is a promising wireless technology for building automation. At the same time, KNX is a well-established building automation system that has a vast installed base. Specifically, the strength of KNX lies in its proven semantic models. These models are the foundation for interoperability and the implementation of larger systems. The presented project demonstrates how a user can easily connect a new BT Mesh system to a well-established, wired KNX building automation system. Notably, the project achieves this through a self-developed stateless gateway, which allows controlling BT Mesh devices from the KNX network and vice versa. As a result, it is possible to leverage existing management systems from KNX building automation systems in BT Mesh networks. Furthermore, the project validates this concept using Home Assistant, a well- known open-source home automation platform and demonstrates, that heterogeneous KNX and BT Mesh systems are feasible

A proposal for a virtual fundamental class for Artin stacks

See thesis, p.

Production of selenium-enriched yeast (Kluyveromyces marxianus) biomass in a whey-based culture medium

Two important aspects of agriculture intensification are the reduction in the concentration of specific soil minerals that affects livestock production and the increase of agricultural by-products, which produce environmental pollution. In this regard, whey - a cheese by-product-often is considered a wasted-product. Due to its lactose concentration, (4.5%), when whey is discarded without treatment generates a high Biological Oxygen Demand (BOD) and a high Chemical Oxygen Demand (COD). Taking into account these two issues, we developed a whey-based culture medium to produce selenium-enriched Kluyveromyces biomass. Then, we evaluated the effect of its supplementation on calves blood selenium concentration. Kluyveromyces marxianus DSM 11954 and Kluyveromyces lactis DSM 3795 strains were used in this study. Different culture media were prepared using whey as a main component and supplemented with peptone, yeast extract, (NH4)2SO4 and K2HPO4 as appropriate. In the selected whey culture medium, three sodium selenite concentrations between 10-30 μg/mL were tested to produce selenium-enriched biomass. After that, a scaled up to 5 L stirred-tank bioreactor was carried out to increase final yeast biomass levels. Finally, dietary supplementation experiments with selenium-enriched yeast were conducted to increase selenium content in calves. K. marxianus DSM 11954 showed a better growth performance than K. lactis DSM 3795 in a medium composed by whey, (NH4)2SO4 5 g/L, K2HPO4 1 g/L (pH 6.5) so, this strain was chosen to continue the experiments. The results showed that sodium selenite addition at 20 μg/mL was adequate to generate selenium-enriched biomass. Our study demonstrated that whey is an optimal and economical culture medium to produce selenium-enriched- yeast biomass. Also, we proved that 10 days of yeast-biomass supplementation raised blood-selenium level in calves.Fil: Gurdo, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); ArgentinaFil: Calafat, Mario Jose. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Noseda, Diego Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); ArgentinaFil: Gigli, Isabel. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentin

Estudio de las propiedades mecánicas de fibras de lino

En los últimos años ha crecido fuertemente el desarrollo de materiales compuestos de matriz polimérica y fibras naturales como refuerzo. Las propiedades de las fibras naturales son determinantes y es indispensable establecer un criterio de análisis para industrializar su uso. Se presentan primeros análisis de fibras de lino, obtenido a partir de rastrojos de la zona de Tandil. Los objetivos de este trabajo son: - Explorar métodos de obtención y la naturaleza de las fibras de lino. - Obtener la carga mecánica soportada por las fibras.Área: Ingeniería, Arquitectura y Tecnologí

Harnessing the potential of open data for valuation transparency in the developing world

There are many responsibilities on many disciplines in addressing both current and future demands related to the growth of cities in the developing world. As they are to be home to over 90 percent of the world’s future children, addressing those demands is urgent. Valuation is at the base of all economic activity. Consequently, accurate and accountable valuations at a proportionate cost can assist in improving market efficiencies for the populations themselves to address their challenges. A major impediment is that property markets in such cities can be opaque, both accidentally and deliberately, so that the information costs of obtaining the reliable data that accurate and accountable valuations require can be much higher than in more developed markets (in contrast to the values, which could well be much lower). The use of open data can be a means of finding the cloth to provide the suit, the “suit” being the best market value reading possible in that market. Particularly when reliable government data is insufficient, by a process of triangulation a valuer can provide the best due diligence available in a market, and thereby contribute to a virtuous spiral in that market’s evolution. This paper explores how this might be done

On the self-similarity of the norm one group of pp-adic division algebras

Let $p$ be a prime, $K$ a finite extension of $\mathbb{Q}_p$, $D$ a finite dimensional central division $K$-algebra, and $SL_1(D)$ the group of elements of $D$ of reduced norm $1$. When $p\geqslant \mathrm{dim}(SL_1(D))$, we provide an infinite family of congruence subgroups of $SL_1(D)$ that do not admit self-similar actions on regular rooted $p$-ary trees. The proof requires results on $\mathbb{Z}_p$-Lie lattices that also lead to the classification of the torsion-free $p$-adic analytic pro-$p$ groups $G$ of dimension less than $p$ with the property that all the nontrivial closed subgroups of $G$ admit a self-similar action on a $p$-ary tree. As a consequence we obtain that a nontrivial torsion-free $p$-adic analytic pro-$p$ group $G$ of dimension less than $p$ is isomorphic to the maximal pro-$p$ Galois group of a field that contains a primitive $p$-th root of unity if and only if all the nontrivial closed subgroups of $G$ admit a self-similar action on a regular rooted $p$-ary tree.Comment: 25 page

Fibroblasts Inform the Heart: Control of Cardiomyocyte Cycling and Size by Age-Dependent Paracrine Signals

Within the developing and adult heart, the fibroblast is often dismissed as merely a structural element, important just to mechanical integrity or to scarring when excessive in disease. Ieda et al. in this issue of Developmental Cell now report an essential program of paracrine factor production in cardiac fibroblasts that controls heart muscle cell growth, driving cycling or enlargement depending on the fibroblasts' developmental stage