Refinement of Techniques Metallographic Analysis of Highly Dispersed Structures

Flaws are regularly made while developing standards and technical specifications. They can come out as minor misprints, as an insufficient description of a technique. In spite the fact that the flaws are well known, it does not come to the stage of introducing changes to standards. In this paper shows that in the normative documents is necessary to clarify the requirements for metallurgical microscopes, which are used for analysis of finely-dispersed

Infinite families of 3-numerical semigroups with arithmetic-like links

Let S = a, b,N be a numerical semigroup generated by a, b,N ∈ N with 1 < a < b < N and gcd(a, b,N) = 1. The conductor of S, denoted by c(S) or c(a, b,N), is the minimum element of S such that c(S) + m ∈ S for all m ∈ N ∪ {0}. Some arithmetic-like links between 3-numerical semigroups were remarked by V. Arnold. For instance he gave links of the form $\displaystyle\frac{c(13, 32, 52)}{c(13, 33, 51)} = \displaystyle\frac{c(9, 43, 45) }{c(9, 42, 46)} = \displaystyle\frac{c(5, 35, 37)}{c(5, 34, 38)} = 2 or \displaystyle\frac{c(4, 20, 73)}{c(4, 19, 74)} = 4$. In this work several infinite families of 3-numerical semigroups with similar properties are given. These families have been found using a plane geometrical approach, known as L-shaped tile, that can be related to a 3-numerical semigroup. This tile defines a plane tessellation that gives information on the related semigroup.Peer Reviewe

Introducció d'elements passius de reforç com elements d'estabilització de talussos utilitzant el codi STABL

Les esllavissades i moviments de terres són accidents actualment molt habituals i que poden provocar nombrosos danys materials i sobretot pèrdues de vides humanes. L’estabilitat de talussos ha estat estudiada des d’anys enrera, sobretot en la investigació de quins factors provocaven la inestabilitat. Coneguts els factors desestabilitzadors, s’han anat incorporant diverses tecnologies sobre els talussos per tal de millorar la seva estabilitat i garantí uns factors de seguretat tolerables per la societat. La introducció d’elements passius com a reforç ha estat una de les tecnologies més utilitzades, en forma de malles, bulons..., però fins i tot els elements actius de reforç aporten al talús unes forces passives estabilitzadores. Existeixen en l’actualitat diversos programes que calculen el factor de seguretat d’un cert talús utilitzant diversos mètodes de càlcul, la majoria basant-se en mètodes iteratius. El procés de càlcul consisteix en examinar la superfície més critica considerant les ruptures internes, mixtes i externes. Si el sòl és inestable, cal incorporar nous reforços i si el sòl és estable, cal treure reforços per tal d’optimitzar la solució

Energy-efficient satellite joint computation and communication

The emerging interest in satellite networks will be a key driver in the path to 6G. The satellite segment must be conceived beyond a mere relay system, where nodes can process data and offload the terrestrial segment. Besides, evidence suggests that energy consumption is among the most important factors for the design of future communication networks. For this motivation, we introduce Sat2C, an energy-efficient algorithm for satellite joint routing, radio resource allocation and task offloading for latency-constrained services. We develop a novel energy model that incorporates the power amplifier subsystem and changes the geometry of the problem. Regarding the routing task, we propose the SHIELD algorithm, based on the submodularity framework and which achieves Pareto-efficient routes. Besides, the RRM problem is formulated as a log-log convex program. The experimental results reveal that Sat2C has low computational complexity, provides routes with low variance in the mean distance and the transmission powers are optimal to ensure energy minimization

Impacte d'un programa d'activitat física basat en el mètode Klapp i Stretching Global Actiu sobre la postura de persones adultes amb escoliosi idiopàtica

Curs 2011-2012La simetria entre espatlles i l’alçada de les dues crestes ilíaques es perd quan es pateix escoliosi. Aquest empitjorament de la bona postura té conseqüències negatives per a la salut, especialment en el sistema musculoesquelètic. L’objecte principal d’aquest treball és avaluar l’impacte d’un programa d’activitat física basat en la combinació dels mètodes “Klapp” i l’“Stretching Global Actiu” sobre la postura en bipedestació de persones adultes que pateixen escoliosi idiopàtica. L’aplicació d’ambdós mètodes de forma individual no obtenen millores en aquests paràmetres en persones adultes, però en canvi en nens i nenes sí. El treball és un estudi experimental en el qual es va assignar un subjecte al grup intervenció i un subjecte al grup control. El subjecte del grup intervenció va realitzar un programa de 20 sessions de 45 – 60 minuts de treball amb aquests dos mètodes de treball físic. El subjecte del grup control va seguir la seva activitat habitual. Abans i després de la intervenció, es varen mesurar les variables dependents principals i secundaries respectivament. Els resultats obtinguts han revelat una petita millora en la simetria de les espatlles (+0,2 cms.) en el grup intervenció però no en la simetria de l’altura de les crestes ilíaques. El grup control no ha presentat canvis. Per tant, podem dir que és útil utilitzar la combinació dels dos mètodes físics per a millorar la postura en persones adultes que pateixen escoliosi idiopàtica.The symmetry between shoulders and the height of the two iliac crests is lost when suffering from scoliosis. This worsening of good posture has negative consequences for health, especially in the musculoskeletal system. The primary purpose of this study was to assess the impact of a physical activity program based on the combination of methods "Klapp" and "Stretching Global Active" on the standing posture in adults suffering from idiopathic scoliosis . The application of both methods individually do not get improvements in these parameters in adults, but in children there are changes. This is an experimental study on a subject was assigned to the intervention group and a control group subject. The subject of the intervention group performed a program of 20 sessions of 45 - 60 minutes working with these two methods of physical work. The subject of the control group continued their usual activities. Before and after the intervention, were the dependent variables measured primary and secondary respectively. The results revealed a small improvement in the symmetry of the shoulders (+0.2 cm.) in the intervention group but not in the symmetry of the height of the iliac crests. The control group presented no changes. Therefore, we can say that it is useful to use a combination of two physical methods to improve posture in adults suffering from idiopathic scoliosis

The Scope of Interrogatories in Washington

It is the purpose of this article to discuss the scope of inquiry allowed by interrogatories propounded under the code in the State of Washington. In order to obtain a comprehensive understanding of this subject, it is necessary to discuss to a certain extent the use of the bill of discovery at common law and trace its development to the use of interrogatories today because the scope of inquiry today is much the same as it was under the old practice