The Reservation Wage Unemployment Duration Nexus

A thorny problem in identifying the determinants of reservation wages and particularly the role of continued joblessness in their evolution is the simultaneity issue. We deploy a natural control function approach to the problem that involves conditioning elapsed duration on completed unemployment duration in the reservation wage equation. Our analysis confirms that the use of elapsed duration alone compounds two separate and opposing influences. Only with the inclusion of completed duration is the negative effect of continued joblessness on reservation wages apparent. For its part, the completed duration coefficient suggests that higher reservation wages negatively influence the probability of exiting unemployment.reservation wages, unemployment duration, control function

U.S. Unemployment Duration: Has Long Become Longer or Short Become Shorter?

The U.S. labor market has been experiencing unprecedented high average unemployment duration. The shift in the unemployment duration distribution can be traced back to the early nineties. In this study, censored quantile regression methods are employed to analyze the changes in the US unemployment duration distribution. We explore the decomposition method proposed by Machado and Mata (2005) to disentangle the contribution of the changes generated by the covariate distribution and by the conditional distribution. The data used in this inquiry are taken from the nationally representative Displaced Worker Surveys of 1988 and 1998. We provide evidence that the change in the unemployment duration distribution is mainly produced by the opposing effects of a sharp rise in job-to-job transition rates and an increased sensitivity of unemployment duration to unemployment rates. Compositional changes in the labor force played a limited role. We rationalize our findings by arguing that improved screening technology is likely to be the relevant underlying mechanism at work.

Relação coronal do implante com a crista óssea

Introdução: A reabilitação com implantes nas últimas décadas tem evoluído tendo em vista a obtenção de melhores resultados ao nível mecânico/funcional, mas também a nível estético. A relação coronal dos implantes com crista óssea é um dos pontos que tem sido estudado. Objectivo: Realizar uma revisão sobre a relação coronal dos implantes com a crista óssea, com objectivo de responder à seguinte questão “A posição sub-crestal dos implantes em relação à crista óssea é vantajosa?”. Para tal vão ser estudados alguns dos factores que podem influenciar esta decisão. Metodologia: Realizou-se pesquisa bibliográfica recorrendo às bases de dados da “MEDLINE/Pubmed”, “SciELO”, “Science Direct”, “B-on”, “Google Academic” e repositórios de várias universidades portuguesas e estrangeiras, com as palavras-chave: “Bone Cells” ”Bone remodeling”, “Bone Crest”, “Osseointegration”, “Implant Placement”, “Biologic Width” e “Platform Switching”,”Implant Placement Depth” e “Morse Cone”, tendo sido estas associadas entre si. Também foi realizada pesquisa manual em livros dos vários temas estudados. Conclusão: A colocação de implantes ao nível sub-crestal ainda apresenta alguma controvérsia, mas obedecendo a alguns factores, como a utilização de um implante e pilar específicos, pode tornar- se algo muito vantajoso numa perspectiva futura.Introduction: The rehabilitation using implants has evolved in the last decades with the purpose of obtaining better results at a mechanical/functional level but also at the aesthetic. The coronal relation between the implants and the bone crest is one of the points that have been more studied. Aim: Perform a revision about the coronal relation of the implants and the bone crest, with the goal to answer the following question “Is the sub-crest position of implants with the bone crest an advantage?”. For this, some factors that might influence this decision will be studied. Methodology: The bibliographic research was made using the data bases of “MEDLINE/Pubmed”, “SciELO”, “Science Direct”, “B-on”, “Google Academic” and the repositories of several Portuguese and foreign universities, using the following key-words:“Bone Cells” ”Bone remodeling”, “Bone Crest”, “Osseointegration”, “Implant Placement”, “Biologic Width” e “Platform Switching” e “Morse Cone”, and associating with each other. There were also used several books about the different subjects studied in this research. Conclusion: The implant placement at a sub-crestal level still presents some controversy, but following some factors, as using specific implant and abutment, it may become something very advantageous in a future perspective

Near real-time analytics engine for vitals and environmental monitoring of first responders

First Responders are on a daily basis exposed to extreme conditions not only because of their duties but also due to the type of environment in which they perform. If the exposure to these conditions is not monitored, it may cause several health problems in long and short-term. This exposure can be controlled through vitals and environmental sensors placed in these professionals. However, the collected data is not relevant if it is not analyzed and processed. This analysis has the most benefits the closer it is to the moment the data is collected, allowing a more informed decision making. The purpose of this thesis is to study and implement a service system in the cloud enabling near real-time processing of the data that was collected by the sensors. This system allows the dynamic change of the running data processing services through a web interface, which also allows changing the source of the data that is going to be processed, whether it is from services that are external to the system or that are read directly from files. For this purpose we need each service to be sufficiently isolated not to interfere with others, choosing to keep a service per container because it addresses the least expensive virtualization option. This solution allows each machine to have several services that share the same computational resources, as its allocation is abstracted by the chosen solution. This system allows not only the integration of processing methods that already exist but also presents enough modularity so that they can be developed and integrated new methods

Petrophysical and geochemical characterization of the late-variscan Santa Eulália Plutonic Complex (Ossa-Morena Zone, Portugal)

The Santa Eulália Plutonic Complex (SEPC) is a calc-alkaline granitic body located in the northern part of the Ossa Morena Zone, composed by a medium- to coarse-grained pink granite (G0 group) involving large elongated masses of mafic (gabbroic) to intermediate (granodioritic) rocks, M group, and a central gray monzonitic granite (G1 group) which present dominant medium granular facies. A multidisciplinary study, including petrophysical, AMS and IRM measurements, and geochemical data, elemental and isotopic (Nd and 18O), point out differences in magnetic behaviour, magnetic lineations patterns and geochemical features, reflecting distinct petrogenetic processes at the level of the magmatic sources and evolution, as well as the emplacement mechanisms of M, G0 and G1 facies associated in the SEPC

A tabular editor for user interfaces modelling

The IVY workbench is a model-based tool for the automated analysis of interactive systems. Models are written in a domain specific language, MAL interactors, using a textual editor. This language has shown to be the main barrier for tool adoption by inexperienced users. We propose a new editor, which eases modelling, in order to lower the tool’s learning curve.Trabalho realizado no ambito do projecto “NORTE-01- ˆ 0145-FEDER-000016” financiado pelo Programa Operacional Regional do Norte (NORTE 2020), PORTUGAL 2020 e Uniao˜ Europeia, atraves do Fundo Europeu para o Desenvolvimento ´ Regional (FEDER).info:eu-repo/semantics/publishedVersio

Joblessness

The U.S. labor market has been experiencing unprecedented high average unemployment duration. The shift in the unemployment duration distribution can be traced back to the early nineties. In this paper, censored quantile regression methods are employed to analyze the changes in the US unemployment duration distribution. We explore the decomposition method proposed by Machado and Mata (2005) to disentangle the contribution of compositional vis-à-vis structural changes. The data used in this inquiry are taken from the nationally representative Displaced Worker Surveys of 1988 and 2008. Apart from the effect of economic improvement we find that the sensitivity of joblessness duration to education and the aging of the population were the two main forces behind the increase of the unemployment duration, in the last twenty years. We tentatively argue that firms use education as a signaling device during recessions, but the signaling power of education during the recent low-unemployment environment faded significantly.

Relativistic evaluation of the two-photon decay of the metastable {1s}^{2} 2s 2p~^3\mbox{P}_0 state in berylliumlike ions with an active-electron model

The two-photon {1s}^{2} 2s 2p~^3\mbox{P}_0 \rightarrow {1s}^{2} {2s}^2 ^1\mbox{S}_0 transition in berylliumlike ions is theoretically investigated within a full relativistic framework and a second-order perturbation theory. We focus our analysis on how electron correlation, as well as the negative-energy spectrum can affect the forbidden $E1M1$ decay rate. For this purpose we include the electronic correlation by an effective potential and within an active-electron model. Due to its experimental interest, evaluation of decay rates are performed for berylliumlike xenon and uranium. We find that the negative-energy contribution can be neglected in the present decay rate. On the other hand, if contributions of electronic correlation are not carefully taken into account, it may change the lifetime of the metastable state by 20\%. By performing a full-relativistic $jj$-coupling calculation, we found discrepancies for the decay rate of an order of 2 compared to non-relativistic $LS$-coupling calculations, for the selected heavy ions.Comment: 7 pages, 3 page

Using the First Principal Component as a Core Inflation Indicator

This paper investigates the consequences of non-stationarity for the principal components analysis and suggests a data transformation that allows obtaining smoother series for the first principal component to be used as a core inflation indicator. The paper also introduces a theoretical model, which allows interpreting core inflation as a common stochastic trend to the year-on-year rates of change of the price indices of the basic CPI items. Finally, it is shown that the first principal component computed in real time meets the evaluation criteria introduced in Marques et al. (2000).