Isotope separation with the RICH detector of the AMS Experiment

The Alpha Magnetic Spectrometer (AMS), to be installed on the International Space Station (ISS) in 2008, is a cosmic ray detector with several subsystems, one of which is a proximity focusing Ring Imaging Cherenkov (RICH) detector. This detector will be equipped with a dual radiator (aerogel+NaF), a lateral conical mirror and a detection plane made of 680 photomultipliers and light guides, enabling precise measurements of particle electric charge and velocity. Combining velocity measurements with data on particle rigidity from the AMS Tracker it is possible to obtain a measurement for particle mass, allowing the separation of isotopes. A Monte Carlo simulation of the RICH detector, based on realistic properties measured at ion beam tests, was performed to evaluate isotope separation capabilities. Results for three elements -- H (Z=1), He (Z=2) and Be (Z=4) -- are presented.Comment: 5 pages. Contribution to the Fifth International Workshop on New Worlds in Astroparticle Physics (Faro 2005). Presenter: Rui Pereir

Video summary - Neptus, command and control infrastructure for heterogeneous teams of autonomous vehicles

This video shows a brief overview over Neptus, a command and control infrastructure for heterogeneous teams of autonomous vehicles. Having different,types of vehicles at our laboratory and from our partners, there was an increasing need to create a common infrastructure to all these systems. Additionally, a tool to support the entire mission life cycle (Planning, Execution, Review and Dissemination) was lacking. Neptus was created to provide vehicle independence and seamless inter-systems communications. Currently, Neptus has been already tested with Remotely Operated Vehicles, Autonomous Underwater Vehicles, Unmanned Air Vehicles, Autonomous Surface Vehicles and Wireless Sensor Networks. Some of these systems were operated simultaneously by various operating consoles that were sharing the same communication infrastructure. The received data was being relayed to a web server that allowed for the real-time mission following by using a common web browser

O digital e seus efeitos no valor da marca

info:eu-repo/semantics/publishedVersio

The approach of sports competition in school: an action research with Physical Education teachers

Sport and competition are completely interconnected issues and are present in society in different ways. However, teachers of Physical Education (EF) at school have difficulties in contextualizing the competition in their classes, often for not knowing proposals that approach the subject in a significant way for them. In this context, this research has as main objective to describe the consequences of an action research with teachers of EF, about the treatment of sports competition in school. In eight meetings, one of the researchers and two teachers met to study the application of Sport Education. The results point to a change in the teachers' conception about the contextualization of sports competition in EF classes, since they understood the possibility of working with this theme from the principles of Sport Education

A framework for cooperative engineering

This paper discusses a framework for Cooperative Engineering (CE) and itsprototype implementation. Cooperative Engineering concerns the application ofConcurrent Engineering techniques to the design and development of products and oftheir manufacturing systems by a network of companies coming together exclusively forthat purpose. CE is a common practice in many industries such as automotive, aerospace,shipbuilding, defence, and pharmaceutical. This framework provides a formal model forCE. This is done in the context of distributed hybrid systems (DHS), a modelling andcontrol framework for networked systems introduced recently by the control andcomputer science communities

Setting of an endoscopic nasal reference point for surgical access to the anterior base through an anatomical study on cadavers

AbstractIntroductionDiseases of paranasal sinuses, nasal cavity, and skull base can be treated by endonasal operations using a nasal rigid endoscope. When conducting this kind of surgery, anatomical references are critical for safety.ObjectiveTo measure the distance from the posterior wall of the maxillary sinus to the skull base, according to socio-demographic characteristics, and to detail an anatomical reference point for paranasal sinus operations and for an access to the anterior skull base, comparing anatomical variations between right and left sides, gender, height, weight, age, and ethnicity in cadavers.MethodsMeasures were taken from the 90° angle (the starting point where deflection of the skull base begins to form the anterior wall of the sphenoid, also known as Δ90°) to the upper, middle, and lower points of the posterior wall of the maxillary sinus. This study used 60 cadavers aged over 17 years, and evaluated these bodies with respect to age, height, BMI, weight, gender, and ethnicity, comparing measurements of right and left sides.ResultsThe measurements were >1.5cm in all cadavers and did not vary with age, height, weight, gender, and ethnicity on their right and left sides. The lack of association between the measurement from Δ90° to the upper, middle, and lower posterior walls of the maxillary sinus (categorical or quantitative) is noteworthy, considering the characteristics studied.ConclusionThe methodology defined the nasal point of reference, considering an absence of variation in the cadavers’ characteristics

Electrochemical sensing of the thyroid hormone thyronamine (T0AM) via molecular imprinted polymers (MIPs)

Recent studies have shown that besides the well-known T3 (triiodothyronine) and T4 (thyroxine) there might be other important thyroid hormones, in particular T0AM (thyronamine) and T1AM (3-iodothyronamine). The absence of a large number of studies showing their precise importance might be explained by the limited number of analytical methodologies available. This work aims to show an electroanalytical alternative making use of electropolymerized molecularly imprinted polymer (MIPs). The MIPs' polymerization is performed on the surface of screen-printed carbon electrodes (SPCEs), using 4-aminobenzoic acid (4-ABA) as the building and functional monomer and the analyte T0AM as the template. The step-by-step construction of the SPCE-MIP sensor was studied by cyclic voltammetry (CV) and by electrochemical impedance spectroscopy (EIS). After optimization, by means of square-wave voltammetry, the SPCE-MIP showed suitable selectivity (in comparison with other thyroid hormones and catechol amines), repeatability (intra-day of 3.9%), a linear range up to 10 μmol L-1 (0.23 × 103 μg dL-1) with an r2 of 0.998 and a limit of detection (LOD) and quantification (LOQ) of 0.081 and 0.27 μmol L-1 (1.9 and 6.2 μg dL-1), respectively.This project was supported by Fundação para a Ciência e a Tecnologia (FCT), and FEDER/COMPETE (UID/QUI/00081/2013, UID/QUI/50006/2013, POCI-01-0145-FEDER-006980 and NORTE-01-0145-FEDER-000028). JGP (SFRH/BPD/101419/2014), PR (SFRH/BD/132384/2017) and LMG (SFRH/BPD/76544/2011) wish to acknowledge FCT for their research grants. FC thanks NORTE-01-0145-FEDER-000028 grant.info:eu-repo/semantics/publishedVersio