73 research outputs found
Wet-white shavings as a potential source for leather retanning bioagents
The tanning industry generates a high quantity of solid wastes, so there is a need to create ways to value these wastes with aim to reduce environmental impact. A lot of research work has been done recently and some authors have shown the potential for obtaining protein hydrolysates from solid wastes and its application. The present work had a main objective the wet-white shavings valorization by production of hydrolysed protein and biopolymrs for leather retanning.The authors would like to acknowledge IAPMEI for the support of the Project LSW2Chem 45319 by Portugal 2020
ProgrammeN/
Exploring events and distributed representations of text in multi-document summarization
In this article, we explore an event detection framework to improve multi-document summarization. Our approach is based on a two-stage single-document method that extracts a collection of key phrases, which are then used in a centrality-as-relevance passage retrieval model. We explore how to adapt this single-document method for multi-document summarization methods that are able to use event information. The event detection method is based on Fuzzy Fingerprint, which is a supervised method trained on documents with annotated event tags. To cope with the possible usage of different terms to describe the same event, we explore distributed representations of text in the form of word embeddings, which contributed to improve the summarization results. The proposed summarization methods are based on the hierarchical combination of single-document summaries. The automatic evaluation and human study performed show that these methods improve upon current state-of-the-art multi-document summarization systems on two mainstream evaluation datasets, DUC 2007 and TAC 2009. We show a relative improvement in ROUGE-1 scores of 16% for TAC 2009 and of 17% for DUC 2007.info:eu-repo/semantics/submittedVersio
MARTA: A high-energy cosmic-ray detector concept with high-accuracy muon measurement
A new concept for the direct measurement of muons in air showers is
presented. The concept is based on resistive plate chambers (RPCs), which can
directly measure muons with very good space and time resolution. The muon
detector is shielded by placing it under another detector able to absorb and
measure the electromagnetic component of the showers such as a water-Cherenkov
detector, commonly used in air shower arrays. The combination of the two
detectors in a single, compact detector unit provides a unique measurement that
opens rich possibilities in the study of air showers.Comment: 11 page
Semantically Aware Text Categorisation for Metadata Annotation
In this paper we illustrate a system aimed at solving a longstanding and challenging problem: acquiring a classifier to automatically annotate bibliographic records by starting from a huge set of unbalanced and unlabelled data. We illustrate the main features of the dataset, the learning algorithm adopted, and how it was used to discriminate philosophical documents from documents of other disciplines. One strength of our approach lies in the novel combination of a standard learning approach with a semantic one: the results of the acquired classifier are improved by accessing a semantic network containing conceptual information. We illustrate the experimentation by describing the construction rationale of training and test set, we report and discuss the obtained results and conclude by drawing future work.</p
Gastronomy and Wine in the Alentejo Portuguese Region: Motivation and Satisfaction of Turists from Évora
Food and winemaking are a recognized tangible and intangible culturalheritage
of Portugal. From the relationshipbetween these twocomponents, astrategic
product emerged with a considerable potential for tourism industry, which is
notignored bymany of tourism organizations. This chapter intends to analyze food
and winemaking from atourism demand perspective. Particularly, this study
describes visitors’ profi le, including, their motivations, their knowledgeabout theenological
and gastronomicresourcesand the degreeof satisfaction. A total of 308
questionnaires were collected between February and May of 2012, from the visitors
that visited the historic center of Évora (Alentejo-Portugal). Results reveal a visitor
profi le associated with regional cuisine and wine products from Portugal. Moreover,
visitors’ evidenced a high level of knowledge regarding the Portuguese cuisine and
regional wines; although this not matches with their primary motivation for visit the
city of Évora
Effects of the electronic threshold on the performance of the RPC system of the CMS experiment
Resistive Plate Chambers have a very important role for muon triggering both in the barrel and in the endcap regions of the CMS experiment at the Large Hadron Collider (LHC). In order to optimize their performance, it is of primary importance to tune the electronic threshold of the front-end boards reading the signals from these detectors. In this paper we present the results of a study aimed to evaluate the effects on the RPC efficiency, cluster size and detector intrinsic noise rate, of variations of the electronics threshold voltage
Machine Learning based tool for CMS RPC currents quality monitoring
The muon system of the CERN Compact Muon Solenoid (CMS) experiment includes
more than a thousand Resistive Plate Chambers (RPC). They are gaseous detectors
operated in the hostile environment of the CMS underground cavern on the Large
Hadron Collider where pp luminosities of up to
are routinely achieved. The CMS RPC system
performance is constantly monitored and the detector is regularly maintained to
ensure stable operation. The main monitorable characteristics are dark current,
efficiency for muon detection, noise rate etc. Herein we describe an automated
tool for CMS RPC current monitoring which uses Machine Learning techniques. We
further elaborate on the dedicated generalized linear model proposed already
and add autoencoder models for self-consistent predictions as well as hybrid
models to allow for RPC current predictions in a distant future
- …