An amendment to this paper has been published and can be accessed via a link at the top of the pa... more An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Neck circumference (NC) has been proposed as a simple and practical tool, independently associate... more Neck circumference (NC) has been proposed as a simple and practical tool, independently associated with cardiometabolic risk factors. However, the association of NC with inter-muscular adipose tissue (IMAT) is still to be determined. We aimed to examine the association of NC with thigh IMAT, and visceral adipose tissue (VAT) measured with computed tomography (CT) in overweight/obese women. 142 premenopausal overweight and obese Caucasian women participated in this cross-sectional study. NC was measured with an inextensible metallic tape above the thyroid cartilage according to International Society for Advancement of Kinanthropometry protocol. Thigh IMAT and VAT volumes were measured with a single cross-sectional CT. Regarding the covariates, fat mass (FM) was assessed with dual-energy x-ray absorptiometry and physical activity was objectively measured with accelerometry. NC was positively associated with thigh IMAT and VAT volumes (standardized β coefficient: β = 0.45, P-value = ≤0...
Magnesium research : official organ of the International Society for the Development of Research on Magnesium, 2011
Magnesium plays significant roles in promoting strength. Surveys of athletes reveal that intake o... more Magnesium plays significant roles in promoting strength. Surveys of athletes reveal that intake of magnesium is often below recommended levels. We aimed to understand the impact of magnesium intake on strength in elite male basketball, handball, and volleyball players. Energy and nutrient intake were assessed from seven-day diet record. Strength tests included maximal isometric trunk flexion, extension, and rotation, handgrip, squat and countermovement Abalakov jump, and maximal isokinetic knee extension and flexion peak torques. Linear regression models were performed with significance at p<0.1. Mean magnesium intake was significantly lower than the recommended daily allowance. Regression analysis indicated that magnesium was directly associated with maximal isometric trunk flexion, rotation, and handgrip, with jumping performance tests, and with all isokinetic strength variables, independent of total energy intake. The observed associations between magnesium intake and muscle ...
We aimed to analyze the association between changes in total and regional fat (FM) and fat-free m... more We aimed to analyze the association between changes in total and regional fat (FM) and fat-free mass (FFM) over a season with resting (REE) and total energy expenditure (TEE) in elite basketball players. At the beginning of the pre-season and at the final of the competitive period, measures of total and regional FM, FFM, lean soft tissue (LST), and bone mineral estimated by DXA and REE by indirect calorimetry were obtained in eight males and nine females of the Portuguese basketball team (16-17 years). TEE was assessed by doubly labeled water. Handgrip and a vertical-jumping were used to assess strength and power. Changes were expressed as a percentage from the baseline values. Resting energy expenditure and TEE increased by 13.2 ± 12.6 and 13.3 ± 12.7% (p \ 0.01), respectively. Increases in FFM (3.6 ± 2.2%) and reductions in relative FM (-4.0 ± 6.6%) were observed (p \ 0.01). The strength and power increased by 14.4 ± 9.9 and 9.8 ± 10.6%, respectively (p \ 0.001). Alone, FFM and arms LST differences explained 25 and 23% of the total variance in REE alteration. These variables remained associated after adjusting for gender and baseline values (b = 0.536, p = 0.042; and b = 2.023, p = 0.016, respectively). Over the season, the REE increase was explained by changes in FFM. The increase in REE along with the strength and power improvement may suggest that a qualitative change in the metabolic active tissues occurred. Furthermore, these findings highlight the regional LST contribution, specifically located at the upper limbs, as a key component for the higher REE occurred over the season in junior basketball players. Keywords Resting energy expenditure Á Indirect calorimetry Á Total energy expenditure Á Doubly labeled water Á Body composition Á Fat-free mass Á Dual energy X-ray absorptiometry Á Regional lean soft tissue Á Stable isotopes Á Elite athletic training Communicated by Klaas R Westerterp.
Scandinavian Journal of Medicine & Science in Sports, 2021
We aimed to validate bioelectrical impedance spectroscopy (BIS), compared with tracer dilution me... more We aimed to validate bioelectrical impedance spectroscopy (BIS), compared with tracer dilution measurements, for assessing total body water (TBW), intracellular water (ICW), and extracellular water (ECW) in athletes differing in hydration status. A total of 201 athletes participated. Reference TBW and ECW were determined by deuterium and bromide dilution methods, respectively; ICW was calculated as TBW‐ECW. Water compartments were estimated by BIS. Urine specific gravity (USG) classified athletes into well‐hydrated (WH) (USG < 1.023), euhydrated (EH) (USG:1.024–1.026), and dehydrated (DH) (USG>1.027). No significant differences were found between BIS and the reference methods for WH, EH, and DH athletes for TBW, ICW nor ECW (p>0.05). Concordance of TBW and its compartments by method was significant (p < 0.001) with coefficients of determination ranging by hydration classification [EH:52–96%;DH:56–98%;WH:71–96%]. Bland‐Altman analyses showed no trend for TBW and its compartments with the exception of ICW in the WH athletes. The 95% confidence BIS intervals for the WH group ranged from −3.08 to 2.68 kg for TBW, −4.28 to 4.14 kg for ICW, and −3.29 to 3.02 kg for ECW. For the EH athletes, the 95% confidence intervals ranged from −2.78 to 2.24 kg for TBW, −4.10 to 3.94 kg for ICW, and −3.44 to 3.06 kg for ECW. In DH group, TBW ranged between −1.99 and 2.01 kg, ICW between −3.78 and 6.34 kg, and ECW between −6.22 and 3.74 kg. These findings show that BIS is useful at a group level in assessing water compartments in athletes differing in hydration status. However, the usefulness of BIS is limited at an individual level, especially in dehydrated athletes.
Apos argumentar que a avaliacao de respostas e algo extremamente complexo, este artigo descreve o... more Apos argumentar que a avaliacao de respostas e algo extremamente complexo, este artigo descreve o processo de avaliacao das respostas do Pagico, e as questoes surgidas no proprio processo, assim como sugere um modelo de gradacao entre respostas e a sua possivel futura classificacao nesses moldes. Alem de descrever o processo seguido, o artigo sugere formas mais avancadas de interface de avaliacao (a desenvolver no futuro). O problema das justificacoes e como e preciso melhorar essa questao e tambem apresentado e discutido. Uma analise dos comentarios dos avaliadores, assim como alguns dados quantitativos sobre esses comentarios, e depois apresentada.
International Journal of Environmental Research and Public Health, 2020
The aims of this study were to analyze the usefulness of raw bioelectrical impedance (BI) paramet... more The aims of this study were to analyze the usefulness of raw bioelectrical impedance (BI) parameters in assessing water compartments and fluid distribution in athletes. A total of 202 men and 71 female athletes were analyzed. Total body water (TBW) and extracellular water (ECW) were determined by dilution techniques, while intracellular water (ICW) was calculated. Fluid distribution was calculated as the ECW/ICW ratio (E:I). Phase angle (PhA), resistance (R) and reactance (Xc) were obtained through BI spectroscopy using frequency 50kHz. Fat (FM) and fat-free mass (FFM) were assessed by dual-energy X-ray absorptiometry. After adjusting for height, FM, FFM, age and sports category we observed that: PhA predicted ICW (females: β = 1.62, p < 0.01; males: β = 2.70, p < 0.01) and E:I (males and females: β = −0.08; p < 0.01); R explained TBW (females: β = −0.03; p < 0.01; males: β = −0.06; p < 0.01) and ECW (females: β =-0.02, p < 0.01; males: β = −0.03, p < 0.01) and ICW (females: β =-0.01, p < 0.053; males: β =-0.03 p < 0.01); and Xc predicted ECW (females: β = −0.06, p < 0.01; males: β = −0.12, p < 0.01). A higher PhA is a good predictor of a larger ICW pool and a lower E:I, regardless of body composition, age, height, and sports category. Lower R is associated with higher water pools whereas ECW expansion is explained by lower Xc. Raw BI parameters are useful predictors of total and extracellular pools, cellular hydration and fluid distribution in athletes.
The objective of this work was to evaluate the effect of interference Brachiaria plantaginea, Bid... more The objective of this work was to evaluate the effect of interference Brachiaria plantaginea, Bidens pilosa and Amaranthus hybridus in the growth of bean plants, as well as the interference of bean on the growth of these weeds, plus the effect of the herbicide mixture, fomesafen + fluazifop-p-butyl, on the development of bean. The experiments were conducted in a greenhouse in pots of 15 dm ³, using a randomized block design. The first experiment evaluated the effect of weed and the effect of the herbicide mixture on the culture, in the second evaluated the effect of interference of bean in the development of three weed species. The bean competition with weeds caused negative effects on crop growth as well as reduced the growth of weeds. B. plantaginea and B. pilosa were the weeds that have resulted in more negative effect on crop growth. All weeds had negative affected growth of the culture. The herbicide mixture caused reduction in root growth of culture; this fact may be reflected...
2009 Seventh Brazilian Symposium in Information and Human Language Technology, 2009
The AC/DC service has been giving access to Portuguese corpora through the Web since 1999. This p... more The AC/DC service has been giving access to Portuguese corpora through the Web since 1999. This paper describes the tasks related to processing and making the texts publicly available. It also provides an overview on the interface with which the users can query the corpora and finalizes pointing future directions.O AC/DC é um serviço que desde 1999 dá acesso a
This paper describes the first attempt to evaluate morphological analysers for Portuguese with an... more This paper describes the first attempt to evaluate morphological analysers for Portuguese with an evaluation contest. It emphasizes the options that had to be taken and that highlight considerable disagreement among the participating groups. It describes the trial intended to prepare the real contest in June 2003, its goals and preliminary results.
GeoCLEF is an evaluation initiative for testing queries with a geographic specification in large ... more GeoCLEF is an evaluation initiative for testing queries with a geographic specification in large set of text documents. GeoCLEF ran a regular track for the third time within the Cross Language Evaluation Forum (CLEF) 2008. The purpose of GeoCLEF is to test and evaluate cross-language geographic information retrieval (GIR). GeoCLEF 2008 consisted of two sub tasks. A search task ran for the third time and a Wikipedia pilot task (GikiP) was organized for the first time. For the GeoCLEF 2008 search task, twenty-five search topics were defined by the organizing groups for searching English, German and Portuguese document collections. Topics were developed also for English, German and Portuguese. Many topics were geographically challenging. Eleven groups submitted 131 runs. The groups used a variety of approaches, including sample documents, named entity extraction and ontology based retrieval. The evaluation methodology and results are presented in the paper.
In this paper, we describe the resumption of activities of Floresta Sintá(c)tica, a treebank for ... more In this paper, we describe the resumption of activities of Floresta Sintá(c)tica, a treebank for Portuguese. We present some underlying guidelines around the project and how they influence our linguistic choices. We then describe the new texts added to the treebank, proceed to mention the new syntactic information added to the old texts, and finally describe the new user-friendly search system and the plans for its expansion.
Um mundo novo na Floresta Sintá(c)ticao treebank do Português A new world in Floresta Sintá(c)tic... more Um mundo novo na Floresta Sintá(c)ticao treebank do Português A new world in Floresta Sintá(c)tica-the Portuguese treebank RESUMO-A Floresta Sintá(c)tica tem como objetivo criar e disponibilizar um corpus sintaticamente anotado. Neste artigo, são apresentados dois novos materiais do projeto: Selva (300 mil palavras e parcialmente revisto) e Amazônia (3.8 milhões de palavras, não revisto). Para lidar com um material tão grande e variado foi construída a interface Milhafre. O artigo mostra, ainda, como vem sendo enfrentado o desafi o de compatibilizar, de uma lado, o usuário lingüista, que pode ter um perfi l muito heterogêneo e, em geral, pouca familiaridade determinadas formalizações mais utilizadas em informática e, de outro, um único modelo de anotação sintática, freqüentemente pouco conhecido do lado "lingüístico não-computacional" e uma interface de acesso e manipulação de corpora capaz de lidar com um objeto tão complexo como a língua. Palavras-chave: árvores sintáticas, corpus anotado, corpus revisto, busca em corpora. ABSTRACT-Floresta Sintá(c)tica is a publicly available treebank for Portuguese, created as a collaboration project between Linguateca and the VISL project. It consists of Brazilian and European Portuguese texts automatically annotated by the parser PALAVRAS (Bick, 2000) and manually revised. In this paper, we present two new corpora, Selva (composed by literary, scientifi c and transcribed spoken texts, partially revised) and Amazonia, (a huge corpus of 3.8 million words, unrevised), and a user-friendly web based corpus tool, Milhafre. We also present how we manage to balance (a) our user, which can have different linguistic background, (b) the need for a grammar that is rich and complex enough in order to process real language (our corpora); and (c) the absence of a consensual syntactic model.
Neste artigo descrevemos a primeira iniciativa de avaliação conjunta no âmbito do processamento c... more Neste artigo descrevemos a primeira iniciativa de avaliação conjunta no âmbito do processamento computacional da língua portuguesa, a que chamámos AvalON (Avaliação: Organização Não-dirigida). Avaliação conjunta é um processo de avaliação em que os critérios se estabelecem de comum acordo entre os participantes, que definem, para uma dada área de aplicação, um conjunto de tarefas e os critérios de sucesso para avaliar a execução dessas tarefas. Embora tenha, em conjunto com outras formas de avaliação, o objectivo de medir a qualidade de um sistema, tem, ao contrário de uma avaliação por juízes, examinadores, ou painel de peritos, a garantia de uma total abertura em relação aos critérios e à explicitação dos objectivos-e não deixa margem para diferenças de opinião na atribuição do resultado. Isto porque apenas se avalia conjuntamente aquilo que os participantes conseguem concordar numa primeira fase (a definição do problema), processo esse que é, aliás, extraordinariamente valioso para definir uma área científica e estimar a sua maturidade. A diferença em relação à avaliação "normal" que se faz em todos os projectos de engenharia informática (e, portanto, em todo o processamento computacional da língua que se preze) é que a medição do progresso é muito mais objectiva, assim como se consegue também uma estimativa da dificuldade do problema em si, e não apenas da sua resolução. O modelo de avaliação conjunta apareceu nos EUA ainda nos anos oitenta do século passado, e em breve se tornou um motor e um exemplo na área do processamento da língua, falada ou escrita. Veja-se Hirschman (1998), Gaizauskas (1998), Voorhes (2000), assim como a lista compilada em Soares (2002b). O modelo expandiu-se pouco depois para a Europa (veja-se Mariani (1998), Paroubek e Blasband (1999) e Chibout et al. (2000)) e para a Ásia. Para o português, foi considerado uma das formas de avançar significativamente, por ocasião do debate alargado associado à criação do Livro Branco (1999), em Santos (1999a; 1999b). 1 Também, devido ao facto de os cidadãos da nossa língua se encontrarem espalhados pelo mundo, há uma necessidade maior de juntar esforços através de um conhecimento mútuo só possível através de competições amigáveis. A tentativa de organização nesse sentido foi, desde o início, um dos objectivos da 1 Além de a organização deste tipo de iniciativas ter sido preconizada no documento preparatório, foi mencionada em várias intervenções no debate.
International Journal of Environmental Research and Public Health, 2021
Health policies rely on physical activity (PA) and sedentary behavior data collected through PA q... more Health policies rely on physical activity (PA) and sedentary behavior data collected through PA questionnaires (PAQs). Validity of international PAQs varies among countries. Therefore, it is important to know the validity of the national versions of the PAQs to properly evaluate the results. We conducted a validation study of the Slovenian versions of the International PAQ Short Form (IPAQ-SF), the Global PAQ (GPAQ), and the PAQ used in the European Health Interview Survey (EHIS-PAQ) on 306 healthy adults. The most valid and reliable constructs in all tested were sedentary behavior and vigorous PA (VPA), however the criterion validity of these constructs was low (Spearman’s ρ 0.38–0.45 for sedentary behavior and 0.34–0.42 for VPA). Moderate to vigorous PA (MVPA) had low validity (0.26–0.29) despite being used as a standard measure of PA behavior. Participants over-reported MVPA for 17 to 156 min and underreported the sedentary behavior for more than two hours. The test-retest study ...
An amendment to this paper has been published and can be accessed via a link at the top of the pa... more An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Neck circumference (NC) has been proposed as a simple and practical tool, independently associate... more Neck circumference (NC) has been proposed as a simple and practical tool, independently associated with cardiometabolic risk factors. However, the association of NC with inter-muscular adipose tissue (IMAT) is still to be determined. We aimed to examine the association of NC with thigh IMAT, and visceral adipose tissue (VAT) measured with computed tomography (CT) in overweight/obese women. 142 premenopausal overweight and obese Caucasian women participated in this cross-sectional study. NC was measured with an inextensible metallic tape above the thyroid cartilage according to International Society for Advancement of Kinanthropometry protocol. Thigh IMAT and VAT volumes were measured with a single cross-sectional CT. Regarding the covariates, fat mass (FM) was assessed with dual-energy x-ray absorptiometry and physical activity was objectively measured with accelerometry. NC was positively associated with thigh IMAT and VAT volumes (standardized β coefficient: β = 0.45, P-value = ≤0...
Magnesium research : official organ of the International Society for the Development of Research on Magnesium, 2011
Magnesium plays significant roles in promoting strength. Surveys of athletes reveal that intake o... more Magnesium plays significant roles in promoting strength. Surveys of athletes reveal that intake of magnesium is often below recommended levels. We aimed to understand the impact of magnesium intake on strength in elite male basketball, handball, and volleyball players. Energy and nutrient intake were assessed from seven-day diet record. Strength tests included maximal isometric trunk flexion, extension, and rotation, handgrip, squat and countermovement Abalakov jump, and maximal isokinetic knee extension and flexion peak torques. Linear regression models were performed with significance at p<0.1. Mean magnesium intake was significantly lower than the recommended daily allowance. Regression analysis indicated that magnesium was directly associated with maximal isometric trunk flexion, rotation, and handgrip, with jumping performance tests, and with all isokinetic strength variables, independent of total energy intake. The observed associations between magnesium intake and muscle ...
We aimed to analyze the association between changes in total and regional fat (FM) and fat-free m... more We aimed to analyze the association between changes in total and regional fat (FM) and fat-free mass (FFM) over a season with resting (REE) and total energy expenditure (TEE) in elite basketball players. At the beginning of the pre-season and at the final of the competitive period, measures of total and regional FM, FFM, lean soft tissue (LST), and bone mineral estimated by DXA and REE by indirect calorimetry were obtained in eight males and nine females of the Portuguese basketball team (16-17 years). TEE was assessed by doubly labeled water. Handgrip and a vertical-jumping were used to assess strength and power. Changes were expressed as a percentage from the baseline values. Resting energy expenditure and TEE increased by 13.2 ± 12.6 and 13.3 ± 12.7% (p \ 0.01), respectively. Increases in FFM (3.6 ± 2.2%) and reductions in relative FM (-4.0 ± 6.6%) were observed (p \ 0.01). The strength and power increased by 14.4 ± 9.9 and 9.8 ± 10.6%, respectively (p \ 0.001). Alone, FFM and arms LST differences explained 25 and 23% of the total variance in REE alteration. These variables remained associated after adjusting for gender and baseline values (b = 0.536, p = 0.042; and b = 2.023, p = 0.016, respectively). Over the season, the REE increase was explained by changes in FFM. The increase in REE along with the strength and power improvement may suggest that a qualitative change in the metabolic active tissues occurred. Furthermore, these findings highlight the regional LST contribution, specifically located at the upper limbs, as a key component for the higher REE occurred over the season in junior basketball players. Keywords Resting energy expenditure Á Indirect calorimetry Á Total energy expenditure Á Doubly labeled water Á Body composition Á Fat-free mass Á Dual energy X-ray absorptiometry Á Regional lean soft tissue Á Stable isotopes Á Elite athletic training Communicated by Klaas R Westerterp.
Scandinavian Journal of Medicine & Science in Sports, 2021
We aimed to validate bioelectrical impedance spectroscopy (BIS), compared with tracer dilution me... more We aimed to validate bioelectrical impedance spectroscopy (BIS), compared with tracer dilution measurements, for assessing total body water (TBW), intracellular water (ICW), and extracellular water (ECW) in athletes differing in hydration status. A total of 201 athletes participated. Reference TBW and ECW were determined by deuterium and bromide dilution methods, respectively; ICW was calculated as TBW‐ECW. Water compartments were estimated by BIS. Urine specific gravity (USG) classified athletes into well‐hydrated (WH) (USG < 1.023), euhydrated (EH) (USG:1.024–1.026), and dehydrated (DH) (USG>1.027). No significant differences were found between BIS and the reference methods for WH, EH, and DH athletes for TBW, ICW nor ECW (p>0.05). Concordance of TBW and its compartments by method was significant (p < 0.001) with coefficients of determination ranging by hydration classification [EH:52–96%;DH:56–98%;WH:71–96%]. Bland‐Altman analyses showed no trend for TBW and its compartments with the exception of ICW in the WH athletes. The 95% confidence BIS intervals for the WH group ranged from −3.08 to 2.68 kg for TBW, −4.28 to 4.14 kg for ICW, and −3.29 to 3.02 kg for ECW. For the EH athletes, the 95% confidence intervals ranged from −2.78 to 2.24 kg for TBW, −4.10 to 3.94 kg for ICW, and −3.44 to 3.06 kg for ECW. In DH group, TBW ranged between −1.99 and 2.01 kg, ICW between −3.78 and 6.34 kg, and ECW between −6.22 and 3.74 kg. These findings show that BIS is useful at a group level in assessing water compartments in athletes differing in hydration status. However, the usefulness of BIS is limited at an individual level, especially in dehydrated athletes.
Apos argumentar que a avaliacao de respostas e algo extremamente complexo, este artigo descreve o... more Apos argumentar que a avaliacao de respostas e algo extremamente complexo, este artigo descreve o processo de avaliacao das respostas do Pagico, e as questoes surgidas no proprio processo, assim como sugere um modelo de gradacao entre respostas e a sua possivel futura classificacao nesses moldes. Alem de descrever o processo seguido, o artigo sugere formas mais avancadas de interface de avaliacao (a desenvolver no futuro). O problema das justificacoes e como e preciso melhorar essa questao e tambem apresentado e discutido. Uma analise dos comentarios dos avaliadores, assim como alguns dados quantitativos sobre esses comentarios, e depois apresentada.
International Journal of Environmental Research and Public Health, 2020
The aims of this study were to analyze the usefulness of raw bioelectrical impedance (BI) paramet... more The aims of this study were to analyze the usefulness of raw bioelectrical impedance (BI) parameters in assessing water compartments and fluid distribution in athletes. A total of 202 men and 71 female athletes were analyzed. Total body water (TBW) and extracellular water (ECW) were determined by dilution techniques, while intracellular water (ICW) was calculated. Fluid distribution was calculated as the ECW/ICW ratio (E:I). Phase angle (PhA), resistance (R) and reactance (Xc) were obtained through BI spectroscopy using frequency 50kHz. Fat (FM) and fat-free mass (FFM) were assessed by dual-energy X-ray absorptiometry. After adjusting for height, FM, FFM, age and sports category we observed that: PhA predicted ICW (females: β = 1.62, p < 0.01; males: β = 2.70, p < 0.01) and E:I (males and females: β = −0.08; p < 0.01); R explained TBW (females: β = −0.03; p < 0.01; males: β = −0.06; p < 0.01) and ECW (females: β =-0.02, p < 0.01; males: β = −0.03, p < 0.01) and ICW (females: β =-0.01, p < 0.053; males: β =-0.03 p < 0.01); and Xc predicted ECW (females: β = −0.06, p < 0.01; males: β = −0.12, p < 0.01). A higher PhA is a good predictor of a larger ICW pool and a lower E:I, regardless of body composition, age, height, and sports category. Lower R is associated with higher water pools whereas ECW expansion is explained by lower Xc. Raw BI parameters are useful predictors of total and extracellular pools, cellular hydration and fluid distribution in athletes.
The objective of this work was to evaluate the effect of interference Brachiaria plantaginea, Bid... more The objective of this work was to evaluate the effect of interference Brachiaria plantaginea, Bidens pilosa and Amaranthus hybridus in the growth of bean plants, as well as the interference of bean on the growth of these weeds, plus the effect of the herbicide mixture, fomesafen + fluazifop-p-butyl, on the development of bean. The experiments were conducted in a greenhouse in pots of 15 dm ³, using a randomized block design. The first experiment evaluated the effect of weed and the effect of the herbicide mixture on the culture, in the second evaluated the effect of interference of bean in the development of three weed species. The bean competition with weeds caused negative effects on crop growth as well as reduced the growth of weeds. B. plantaginea and B. pilosa were the weeds that have resulted in more negative effect on crop growth. All weeds had negative affected growth of the culture. The herbicide mixture caused reduction in root growth of culture; this fact may be reflected...
2009 Seventh Brazilian Symposium in Information and Human Language Technology, 2009
The AC/DC service has been giving access to Portuguese corpora through the Web since 1999. This p... more The AC/DC service has been giving access to Portuguese corpora through the Web since 1999. This paper describes the tasks related to processing and making the texts publicly available. It also provides an overview on the interface with which the users can query the corpora and finalizes pointing future directions.O AC/DC é um serviço que desde 1999 dá acesso a
This paper describes the first attempt to evaluate morphological analysers for Portuguese with an... more This paper describes the first attempt to evaluate morphological analysers for Portuguese with an evaluation contest. It emphasizes the options that had to be taken and that highlight considerable disagreement among the participating groups. It describes the trial intended to prepare the real contest in June 2003, its goals and preliminary results.
GeoCLEF is an evaluation initiative for testing queries with a geographic specification in large ... more GeoCLEF is an evaluation initiative for testing queries with a geographic specification in large set of text documents. GeoCLEF ran a regular track for the third time within the Cross Language Evaluation Forum (CLEF) 2008. The purpose of GeoCLEF is to test and evaluate cross-language geographic information retrieval (GIR). GeoCLEF 2008 consisted of two sub tasks. A search task ran for the third time and a Wikipedia pilot task (GikiP) was organized for the first time. For the GeoCLEF 2008 search task, twenty-five search topics were defined by the organizing groups for searching English, German and Portuguese document collections. Topics were developed also for English, German and Portuguese. Many topics were geographically challenging. Eleven groups submitted 131 runs. The groups used a variety of approaches, including sample documents, named entity extraction and ontology based retrieval. The evaluation methodology and results are presented in the paper.
In this paper, we describe the resumption of activities of Floresta Sintá(c)tica, a treebank for ... more In this paper, we describe the resumption of activities of Floresta Sintá(c)tica, a treebank for Portuguese. We present some underlying guidelines around the project and how they influence our linguistic choices. We then describe the new texts added to the treebank, proceed to mention the new syntactic information added to the old texts, and finally describe the new user-friendly search system and the plans for its expansion.
Um mundo novo na Floresta Sintá(c)ticao treebank do Português A new world in Floresta Sintá(c)tic... more Um mundo novo na Floresta Sintá(c)ticao treebank do Português A new world in Floresta Sintá(c)tica-the Portuguese treebank RESUMO-A Floresta Sintá(c)tica tem como objetivo criar e disponibilizar um corpus sintaticamente anotado. Neste artigo, são apresentados dois novos materiais do projeto: Selva (300 mil palavras e parcialmente revisto) e Amazônia (3.8 milhões de palavras, não revisto). Para lidar com um material tão grande e variado foi construída a interface Milhafre. O artigo mostra, ainda, como vem sendo enfrentado o desafi o de compatibilizar, de uma lado, o usuário lingüista, que pode ter um perfi l muito heterogêneo e, em geral, pouca familiaridade determinadas formalizações mais utilizadas em informática e, de outro, um único modelo de anotação sintática, freqüentemente pouco conhecido do lado "lingüístico não-computacional" e uma interface de acesso e manipulação de corpora capaz de lidar com um objeto tão complexo como a língua. Palavras-chave: árvores sintáticas, corpus anotado, corpus revisto, busca em corpora. ABSTRACT-Floresta Sintá(c)tica is a publicly available treebank for Portuguese, created as a collaboration project between Linguateca and the VISL project. It consists of Brazilian and European Portuguese texts automatically annotated by the parser PALAVRAS (Bick, 2000) and manually revised. In this paper, we present two new corpora, Selva (composed by literary, scientifi c and transcribed spoken texts, partially revised) and Amazonia, (a huge corpus of 3.8 million words, unrevised), and a user-friendly web based corpus tool, Milhafre. We also present how we manage to balance (a) our user, which can have different linguistic background, (b) the need for a grammar that is rich and complex enough in order to process real language (our corpora); and (c) the absence of a consensual syntactic model.
Neste artigo descrevemos a primeira iniciativa de avaliação conjunta no âmbito do processamento c... more Neste artigo descrevemos a primeira iniciativa de avaliação conjunta no âmbito do processamento computacional da língua portuguesa, a que chamámos AvalON (Avaliação: Organização Não-dirigida). Avaliação conjunta é um processo de avaliação em que os critérios se estabelecem de comum acordo entre os participantes, que definem, para uma dada área de aplicação, um conjunto de tarefas e os critérios de sucesso para avaliar a execução dessas tarefas. Embora tenha, em conjunto com outras formas de avaliação, o objectivo de medir a qualidade de um sistema, tem, ao contrário de uma avaliação por juízes, examinadores, ou painel de peritos, a garantia de uma total abertura em relação aos critérios e à explicitação dos objectivos-e não deixa margem para diferenças de opinião na atribuição do resultado. Isto porque apenas se avalia conjuntamente aquilo que os participantes conseguem concordar numa primeira fase (a definição do problema), processo esse que é, aliás, extraordinariamente valioso para definir uma área científica e estimar a sua maturidade. A diferença em relação à avaliação "normal" que se faz em todos os projectos de engenharia informática (e, portanto, em todo o processamento computacional da língua que se preze) é que a medição do progresso é muito mais objectiva, assim como se consegue também uma estimativa da dificuldade do problema em si, e não apenas da sua resolução. O modelo de avaliação conjunta apareceu nos EUA ainda nos anos oitenta do século passado, e em breve se tornou um motor e um exemplo na área do processamento da língua, falada ou escrita. Veja-se Hirschman (1998), Gaizauskas (1998), Voorhes (2000), assim como a lista compilada em Soares (2002b). O modelo expandiu-se pouco depois para a Europa (veja-se Mariani (1998), Paroubek e Blasband (1999) e Chibout et al. (2000)) e para a Ásia. Para o português, foi considerado uma das formas de avançar significativamente, por ocasião do debate alargado associado à criação do Livro Branco (1999), em Santos (1999a; 1999b). 1 Também, devido ao facto de os cidadãos da nossa língua se encontrarem espalhados pelo mundo, há uma necessidade maior de juntar esforços através de um conhecimento mútuo só possível através de competições amigáveis. A tentativa de organização nesse sentido foi, desde o início, um dos objectivos da 1 Além de a organização deste tipo de iniciativas ter sido preconizada no documento preparatório, foi mencionada em várias intervenções no debate.
International Journal of Environmental Research and Public Health, 2021
Health policies rely on physical activity (PA) and sedentary behavior data collected through PA q... more Health policies rely on physical activity (PA) and sedentary behavior data collected through PA questionnaires (PAQs). Validity of international PAQs varies among countries. Therefore, it is important to know the validity of the national versions of the PAQs to properly evaluate the results. We conducted a validation study of the Slovenian versions of the International PAQ Short Form (IPAQ-SF), the Global PAQ (GPAQ), and the PAQ used in the European Health Interview Survey (EHIS-PAQ) on 306 healthy adults. The most valid and reliable constructs in all tested were sedentary behavior and vigorous PA (VPA), however the criterion validity of these constructs was low (Spearman’s ρ 0.38–0.45 for sedentary behavior and 0.34–0.42 for VPA). Moderate to vigorous PA (MVPA) had low validity (0.26–0.29) despite being used as a standard measure of PA behavior. Participants over-reported MVPA for 17 to 156 min and underreported the sedentary behavior for more than two hours. The test-retest study ...
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Papers by Paulo Rocha