Bayesian beta regression models: joint mean and precision modeling

This paper summarizes the beta regression models, with joint modeling of the mean and precision parameters, and the Bayesian methodology proposed by Cepeda (2001) and Cepeda and Gamenrman (2005) to fit these models. This Bayesian methodology is implemented and applied in the development of simulated and applied studies

Bivariate beta regression models: a Bayesian approach applied to educational data

In this paper we propose a bivariate beta regression model, de¯ning the beta distribution derived from Farlie-Gumbel-Morgenstern (FGM) copulas. This model could be a good alternative to analyze pairs of proportions, when they are not independent. To ¯t the proposed models we apply standard existing MCMC (Markov Chain Monte Carlo) methods to simulate samples for the joint posterior of interest, using the Bayesian methodology proposed by Cepeda and Gamerman (2001) and Cepeda and Gamerman (2005). Two examples are introduced to illustrate the proposed methodology: an example with simulated bivariate data and an example with a real data set

Corrosion in 316L porous prostheses obtained by gelcasting

Gelcasting (GC) process, usually used for ceramic moulding, is adapted for producing spongy or porous metal osteosynthesis components destined to bone void filling. The main objective of the interconnected porosity is to improve the osteoconductive of metal matrix by ingrowth of bone. Further, porosity reduces metal density and Young module, which causes bone resorption, leading to implant failure, phenomenon known as stress shielding. The employed GC is based on the formulation of AISI 316L stainless steel powder suspension in an aqueous solution of organic polymers. This suspension is cast into porous ceramic shells, like those used in lost wax technique, wherein the polymer crosslinking is induced by heating. The shells, containing the resulting hydrogel–metal composite, are subjected to thermal cycle in order to dry, burn the organic phase, sinter the metal particles at 1200 °C, and cool down to room temperature under dry hydrogen permanent flow. The susceptibility to corrosion of 50-60 % porous pieces was analyzed. The results indicated that the lower relation between the open porosity and the total porosity, the lower the corrosion rate.International Congress of Science and Technology of Metallurgy and Materials, SAM – CONAMET 201

Aplicación tecnológica de arcillas (acopios) de la sucesión superior de la formación Cerro Largo, Buenos Aires, Argentina

Based on mineralogical, physicochemical and technological characterization, the brownish and red clays of the upper pelitic succession of the Cerro Largo Formation, Sierras Bayas, Province of Buenos Aires, recently redefined as Olavarría Formation, composed of predominant illitic material, with impurities of quartz, calcite, siderite, hematite, goethite and pyrite, are suitable for red ceramic producís of low water absorption (15%). Preliminary controlled mixtures of the two varieties found (brownish and red), with different technological properties, constitute a better quality product than the ones obtained with the individual clays, wen with the addition of 3-5% bentonite.VI Reunión Argentina de Sedimentología - I Simposio de Arcilla realizado en Bahía Blanca, Argentina los días 16 al 27 de mayo de 1996

Corrosión en prótesis porosas de AISI 316L obtenidas por Gelcasting

El Proceso gelcasting (GC), que generalmente se usa para el moldeo de cerámica, es adaptado para la producción de componentes de metal de osteosíntesis esponjosos porosos o prótesis, destinada llenado de defectos óseos. El objetivo principal de la porosidad interconectada es mejorar la osteoconductividad de matriz metálica y el crecimiento de hueso en su interior. Además, la porosidad disminuye la densidad de metal y los módulos de Young, que causan la resorción ósea, lo que lleva al fracaso del implante, fenómeno conocido apantallamiento de tensiones. El GC empleada se basa en la formulación de una suspensión de polvo de acero inoxidable AISI 316L en una solución acuosa de monómeros y polímeros orgánicos. Esta es colada en cáscara cerámicas porosas, como los utilizados en la técnica de la cera perdida, en la que el entrecruzado polimérico es inducido por calentamiento. Las cáscaras, que contienen el compuesto de metal de hidrogel resultante, se someten a ciclo térmico con el fin de secar, quemar la fase orgánica, sinterizar las partículas de metal a 1200 º C, y enfriar a temperatura ambiente bajo hidrógeno flujo permanente seco. La susceptibilidad a la corrosión fue analizada en piezas con porosidades entre 50 a 60%.. Los resultados indicaron que cuanto menor es la relación entre la porosidad abierta y la porosidad total, menor es la velocidad de corrosión.Gelcasting (GC) process, usually used for ceramic moulding, is adapted for producing spongy or porous metal osteosynthesis components destined to bone void filling. The main objective of the interconnected porosity is to improve the osteoconductive of metal matrix by ingrowth of bone. Further, porosity reduces metal density and Young module, which cause bone resorption, leading to implant failure, phenomenon known as stress shielding. The employed GC is based on the formulation of AISI 316L stainless steel powder suspension in an aqueous solution of organic polymers. This suspension is cast into porous ceramic shells, like those used in lost wax technique, wherein the polymer crosslinking is induced by heating. The shells, containing the resulting hydrogel–metal composite, are subjected to thermal cycle in order to dry, burn the organic phase, sinter the metal particles at 1200 °C, and cool down to room temperature under dry hydrogen permanent flow. The susceptibility to corrosion of 50-60 % porous pieces was analyzed. The results indicated that the lower relation between the open porosity and the total porosity, the lower the corrosion rate

Standards in semen examination:publishing reproducible and reliable data based on high-quality methodology

Biomedical science is rapidly developing in terms of more transparency, openness and reproducibility of scientific publications. This is even more important for all studies that are based on results from basic semen examination. Recently two concordant documents have been published: the 6th edition of the WHO Laboratory Manual for the Examination and Processing of Human Semen, and the International Standard ISO 23162:2021. With these tools, we propose that authors should be instructed to follow these laboratory methods in order to publish studies in peer-reviewed journals, preferable by using a checklist as suggested in an Appendix to this article.Peer reviewe

Juxtaposing BTE and ATE – on the role of the European insurance industry in funding civil litigation

One of the ways in which legal services are financed, and indeed shaped, is through private insurance arrangement. Two contrasting types of legal expenses insurance contracts (LEI) seem to dominate in Europe: before the event (BTE) and after the event (ATE) legal expenses insurance. Notwithstanding institutional differences between different legal systems, BTE and ATE insurance arrangements may be instrumental if government policy is geared towards strengthening a market-oriented system of financing access to justice for individuals and business. At the same time, emphasizing the role of a private industry as a keeper of the gates to justice raises issues of accountability and transparency, not readily reconcilable with demands of competition. Moreover, multiple actors (clients, lawyers, courts, insurers) are involved, causing behavioural dynamics which are not easily predicted or influenced. Against this background, this paper looks into BTE and ATE arrangements by analysing the particularities of BTE and ATE arrangements currently available in some European jurisdictions and by painting a picture of their respective markets and legal contexts. This allows for some reflection on the performance of BTE and ATE providers as both financiers and keepers. Two issues emerge from the analysis that are worthy of some further reflection. Firstly, there is the problematic long-term sustainability of some ATE products. Secondly, the challenges faced by policymakers that would like to nudge consumers into voluntarily taking out BTE LEI

Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan

This paper describe development and financial performance of cooperative in District Pelalawan among 2007 - 2008. Studies on primary and secondary cooperative in 12 sub-districts. Method in this stady use performance measuring of productivity, efficiency, growth, liquidity, and solvability of cooperative. Productivity of cooperative in Pelalawan was highly but efficiency still low. Profit and income were highly, even liquidity of cooperative very high, and solvability was good

Search for stop and higgsino production using diphoton Higgs boson decays

Results are presented of a search for a "natural" supersymmetry scenario with gauge mediated symmetry breaking. It is assumed that only the supersymmetric partners of the top-quark (stop) and the Higgs boson (higgsino) are accessible. Events are examined in which there are two photons forming a Higgs boson candidate, and at least two b-quark jets. In 19.7 inverse femtobarns of proton-proton collision data at sqrt(s) = 8 TeV, recorded in the CMS experiment, no evidence of a signal is found and lower limits at the 95% confidence level are set, excluding the stop mass below 360 to 410 GeV, depending on the higgsino mass