luis carlos | INSUTEC - Academia.edu (original) (raw)

Papers by luis carlos

The American journal of …, Jan 1, 2008

This cross-sectional, population-based observational study using stratified multistage sampling a... more This cross-sectional, population-based observational study using stratified multistage sampling assessed the prevalence of cardiovascular risk factors and carotid plaques and measured carotid intimamedia thickness in individuals living in major cities in 7 Latin American countries.

Public Health …, Jan 1, 2002

The purpose of this paper is to present key points of an intervention programme (Agita São Paulo ... more The purpose of this paper is to present key points of an intervention programme (Agita São Paulo Program) to promote physical activity in a developing country. Agita is a multi-level, community-wide intervention designed to increase knowledge about the benefits and the level of physical activity in a mega-population of 34 million inhabitants of São Paulo State, Brazil. The main message was taken from the Centers for Disease Control/American College of Sports Medicine (CDC/ACSM) recommendation that: 'everyone should accumulate at least 30 minutes of physical activity, on most days of the weeks, of moderate intensity, in one single or in multiple sessions'. Activities were encouraged in three settings: home, transport and leisure time. Focus groups were students from elementary schools through to college, white and blue collar workers, and elderly people. Innovative aspects included: (1) a research centre leading the process, (2) scientific and institutional partnerships (over 160 groups), (3) a feasible approach -the 'one-step-ahead' model, (4) empowerment, (5) inclusion, (6) non-paid media, (7) social marketing, and (8) culture-linked. Data were obtained from 645 random, home-based questionnaires over four years -stratified by sex, age, education and socio-economic level. These data show that the Agita message reached 55.7% of the population, and among these, 23.1% knew the main message. Recall of Agita and knowledge of its purpose were well distributed among different socioeconomic levels, being known by 67% of the most educated. The prevalence of people reaching the recommendation was 54.8% (men 48.7%, women 61%); and risk of being sedentary was quite smaller among those who knew the Agita message (7.1%) compared with those who did not know (13.1%). In conclusion, based upon the Agita São Paulo experience, it appears that a multi-level, community-wide intervention to promote physical activity may obtain good results if the model contains the items listed above.

Angewandte Chemie …, Jan 1, 2008

The materials were prepared with all Ln elements (except for radioactive Pm) and different mixtur... more The materials were prepared with all Ln elements (except for radioactive Pm) and different mixtures of two or more lanthanides.

Chemistry of …, Jan 1, 2003

New lanthanide complexes of 3-hydroxypicolinic acid (HpicOH) were prepared: [Ln(H 2 O)-(picOH) 2 ... more New lanthanide complexes of 3-hydroxypicolinic acid (HpicOH) were prepared: [Ln(H 2 O)-(picOH) 2 (µ-HpicO)]‚3H 2 O (Ln ) Eu, Tb, Er). The complexes were characterized using photoluminescence, infrared, Raman, and 1 H NMR spectroscopy, and elemental analysis. The crystal structure of [Eu(H 2 O)(picOH) 2 (µ-HpicO)]‚3H 2 O 1 was determined by X-ray diffraction. Compound 1 crystallizes in a monoclinic system with space group P2 1 /c and cell parameters a ) 9.105(13) Å, b ) 18.796(25) Å, and c ) 13.531(17) Å, and ) 104.86(1) deg. The 3-hydroxypicolinate ligands coordinate through both N,O-or O,O-chelation to the lanthanide ions, as shown by X-ray and spectroscopic results. Photoluminescence measurements were performed for the Eu(III) and Tb(III) complexes; the Eu(III) complex was investigated in more detail. The Eu(III) compound is highly luminescent and acts as a photoactive center in nanocomposite materials whose host matrixes are silica nanoparticles.

Pharmacology & …, Jan 1, 2001

Data Mining, 2002. ICDM …, Jan 1, 2002

In view of the substantial number of existing feature selection algorithms, the need arises to co... more In view of the substantial number of existing feature selection algorithms, the need arises to count on criteria that enables to adequately decide which algorithm to use in certain situations. This work reviews several fundamental algorithms found in the literature and assesses their performance in a controlled scenario. A scoring measure ranks the algorithms by taking into account the amount of relevance, irrelevance and redundance on sample data sets. This measure computes the degree of matching between the output given by the algorithm and the known optimal solution. Sample size effects are also studied.

Advanced …, Jan 1, 2000

Page 1. Communications 594 © WILEY-VCH Verlag GmbH, D-69469 Weinheim, 2000 0935-9648/00/0804-0594... more Page 1. Communications 594 © WILEY-VCH Verlag GmbH, D-69469 Weinheim, 2000 0935-9648/00/0804-0594 $ 17.50+.50/0 Adv. Mater. 2000, 12, No. 8 b) D. Beljonne, BMW Langeveld-Voss, Z. Shuai, RAJ Janssen, SCJ Meskers, EW Meijer, J.-L. BrØdas, Synth. Met. ...

Proceedings of the …, Jan 1, 2003

Every plant species examined to date harbors endophytic fungi within its asymptomatic aerial tiss... more Every plant species examined to date harbors endophytic fungi within its asymptomatic aerial tissues, such that endophytes represent a ubiquitous, yet cryptic, component of terrestrial plant communities. Fungal endophytes associated with leaves of woody angiosperms are especially diverse; yet, fundamental aspects of their interactions with hosts are unknown. In contrast to the relatively species-poor endophytes that are vertically transmitted and act as defensive mutualists of some temperate grasses, the diverse, horizontally transmitted endophytes of woody angiosperms are thought to contribute little to host defense. Here, we document high diversity, spatial structure, and host affinity among foliar endophytes associated with a tropical tree (Theobroma cacao, Malvaceae) across lowland Panama. We then show that inoculation of endophyte-free leaves with endophytes isolated frequently from naturally infected, asymptomatic hosts significantly decreases both leaf necrosis and leaf mortality when T. cacao seedlings are challenged with a major pathogen (Phytophthora sp.). In contrast to reports of fungal inoculation inducing systemic defense, we found that protection was primarily localized to endophyte-infected tissues. Further, endophyte-mediated protection was greater in mature leaves, which bear less intrinsic defense against fungal pathogens than do young leaves. In vitro studies suggest that host affinity is mediated by leaf chemistry, and that protection may be mediated by direct interactions of endophytes with foliar pathogens. Together, these data demonstrate the capacity of diverse, horizontally transmitted endophytes of woody angiosperms to play an important but previously unappreciated role in host defense.