441 Works

History and Memory Ways: UERJ’s Open University for Studies on the Elderly

Sandra Regina Sahb Furtado & Neusa Cardim Da Silva
ABSTRACT This paper presents the Memory Project, of the Open University for Studies on the Elderly, Rio de Janeiro State University (UnATI/UERJ) developed by the Reference and Documentation on Ageing Center (CRDE). The Project’s main goal is to organize and preserve UnATI’s memory and the specific aims are to bring back historical documents and create a database with indexed and registered informational material, besides collecting oral depositions to compose the collection. The paper brings historical...

Evolution of the comprehensive level of the Quoridor game: a comparison between elderly women and adolescents

Claudimara Chisté Santos & Antonio Carlos Ortega
ABSTRACT The cognitive aspects related to ageing need a more thorough investigation, in view of the need of creating preventive or maintenance strategies for an active and healthy ageing. This research aimed to compare the evolution of the comprehension level of a game of rules between elderly women and adolescents. Two groups of four participants for each age group were formed: one aged 65-75 years, and the other, 16-17 years. The study was based on...

Effect of aerobic physical exercise on the lipid profile in type 2 diabetic elderly women attended in a basic health unit in Maringá, Paraná State, Brazil

Carlos Alexandre Molena-Fernandes, Idalina Diair Regla Carolino, Rui Gonçalves Marques Elias, Nelson Nardo Junior, Raquel Soares Tasca & Roberto Kenji Nakamura Cuman
ABSTRACT This study aims to evaluate the influence of a physical exercise program on the lipid profile in type 2 diabetic elderly women. The patients were selected from a Basic Unit of Health (Mandacaru - NIS II, Maringá, Paraná), that attends 200 type 2 diabetic subjects. Among these patients, 40 women aged 60 years or more were randomically selected. The sample was distributed in two groups of 20 patients each: the Trained Group (TG), that...

INVESTIGATION OF THE CORPORAL BALANCE IN ELDERLY PEOPLE

Luana Mann, Julio Francisco Kleinpaul, Clarissa Stefani Teixeira, Angela Garcia Rossi, Luis Felipe Dias Lopes & Carlos Bolli Mota
ABSTRACT As people grow old, the human body undergoes for a long period of changes that cause a decline in some physical abilities, such as balance. This study aimed to compare the corporal balance of adult people who practice hydrogymnastics and sedentary elderly people in different support basis, with visual manipulation. It assessed 20 elderly people who practice hydrogymnastics and 15 sedentary adults. The balance was collected through a force platform AMTI. The support basis...

Immunosenescence: the association between leukocytes, cytokines and chronic diseases

Audrey Cecília Tonet & Otávio De Tolêdo Nóbrega
ABSTRACT The aging process and its natural consequence – oldness – are one of the major concerns of modern society, especially due to the rapid growth of the elderly population when compared to other age groups. This particular growth brings about significant changes in our civilization and also challenges society in several aspects, especially in those concerning health issues. This latter aspect is probably the most emphasized and worrisome, since a large proportion of older-adults...

Safety evaluation in the use of fitness equipment by the elderly

Carlos Eduardo Gonçalves Simas, Henrique Riera De Farias, Marcio Michel Gil, Renato Landim & Homero Da Silva Nahum Junior
Abstract This study aimed to evaluate the safety of elders during the use of fitness equipment. Ninety subjects were interviewed, 64 women (71.11%) and 26 men (28.89%). Data were collected through a questionnaire. Answers were treated with frequency analysis and then compared by Qui-squared test (a = 0.05), allowing to conclude that fitness practice’s primary goal was to improve health conditions (60.83%), and hydro-gymnastics was the second activity that most interested subjects (80.00%). Among the...

PHYSICAL ACTIVITY AND PREVALENCE OF FALLS AMONG ELDERLY LIVING IN SOUTHERN BRAZIL

Tânia R. Bertoldo Benedetti, Maria Angélica Binotto, Edio Luiz Petroski & Lúcia Hisako Takase Gonçalves
Abstract This study aimed to investigate the relation between the physical activities level and falls prevalence among elderly people in the city of Florianopolis, state of Santa Catatina, Brazil. It is an epidemiological , cross-sectional and descriptive study, carried out in the city of Florianópolis, Brazil. The sampling, of statistical type and stratified by census section and sex, resulted in a sample of 875 senior citizens. The instruments adopted for data collection were the Questionnaire...

Noise reduction in a laser polarimeter based on discrete waveplate rotations

Israel J. Vaughn & Brian G. Hoover
While several analyses of polarimeter noise-reduction have been published, little data has been presented to support the analytical results, particularly for a laser polarimeter based on measurements taken at discrete, independent rotation angles of two birefringent waveplates. This paper derives and experimentally demonstrates the reduction of both system and speckle noise in this type of laser polarimeter, achieved by optimizing the rotation angles of the waveplates by minimizing the condition numbers of the appropriate matrix...

Noise reduction in a laser polarimeter based on discrete waveplate rotations

Israel J. Vaughn & Brian G. Hoover
While several analyses of polarimeter noise-reduction have been published, little data has been presented to support the analytical results, particularly for a laser polarimeter based on measurements taken at discrete, independent rotation angles of two birefringent waveplates. This paper derives and experimentally demonstrates the reduction of both system and speckle noise in this type of laser polarimeter, achieved by optimizing the rotation angles of the waveplates by minimizing the condition numbers of the appropriate matrix...

Full-wave finite-difference time-domain simulation of electromagnetic cloaking structures

Yan Zhao, Christos Argyropoulos & Yang Hao
This paper proposes a radial dependent dispersive finite-difference time-domain method for the modeling of electromagnetic cloaking structures. The permittivity and permeability of the cloak are mapped to the Drude dispersion model and taken into account in dispersive FDTD simulations. Numerical simulations demonstrate that under ideal conditions, objects placed inside the cloak are ‘invisible’ to external electromagnetic fields. However for the simplified cloak based on linear transformations, the back scattering has a similar level to the...

Full-wave finite-difference time-domain simulation of electromagnetic cloaking structures

Yan Zhao, Christos Argyropoulos & Yang Hao
This paper proposes a radial dependent dispersive finite-difference time-domain method for the modeling of electromagnetic cloaking structures. The permittivity and permeability of the cloak are mapped to the Drude dispersion model and taken into account in dispersive FDTD simulations. Numerical simulations demonstrate that under ideal conditions, objects placed inside the cloak are ‘invisible’ to external electromagnetic fields. However for the simplified cloak based on linear transformations, the back scattering has a similar level to the...

Focal shift in vector Mathieu-Gauss beams

Raul I. Hernandez-Aranda & Julio C. Gutiérrez-Vega
The three dimensional distribution of focused vector Mathieu-Gauss beams (vMG) is studied in the vicinity of the geometrical focus of an unapertured thin lens. We adopt two different intensity based criteria for defining the actual focus. Our analysis confirms the existence of a focal shift towards the lens for this type of beams. The dependence of the focal shift on the different parameters of the beams is discussed in detail. Beams with different states of...

Focal shift in vector Mathieu-Gauss beams

Raul I. Hernandez-Aranda & Julio C. Gutiérrez-Vega
The three dimensional distribution of focused vector Mathieu-Gauss beams (vMG) is studied in the vicinity of the geometrical focus of an unapertured thin lens. We adopt two different intensity based criteria for defining the actual focus. Our analysis confirms the existence of a focal shift towards the lens for this type of beams. The dependence of the focal shift on the different parameters of the beams is discussed in detail. Beams with different states of...

Closed form formula for Mie scattering of nonparaxial analogues of Gaussian beams

Nicole J. Moore & Miguel A. Alonso
A closed form formula is found for the Mie scattering coefficents of incident complex focus beams (which are a nonparaxial generalization of Gaussian beams) with any numerical aperture. This formula takes the compact form of multipoles evaluated at a single complex point. Included are the cases of incident scalar fields as well as electromagnetic fields with many polarizations, such as linear, circular, azimuthal and radial. Examples of incident radially and azimuthally polarized beams are presented.

Closed form formula for Mie scattering of nonparaxial analogues of Gaussian beams

Nicole J. Moore & Miguel A. Alonso
A closed form formula is found for the Mie scattering coefficents of incident complex focus beams (which are a nonparaxial generalization of Gaussian beams) with any numerical aperture. This formula takes the compact form of multipoles evaluated at a single complex point. Included are the cases of incident scalar fields as well as electromagnetic fields with many polarizations, such as linear, circular, azimuthal and radial. Examples of incident radially and azimuthally polarized beams are presented.

Three dimensional imaging with randomly distributed sensors

Mehdi DaneshPanah, Bahram Javidi & Edward A. Watson
As a promising three dimensional passive imaging modality, Integral Imaging (II) has been investigated widely within the research community. In virtually all of such investigations, there is an implicit assumption that the collection of elemental images lie on a simple geometric surface (e.g. flat, concave, etc), also known as pickup surface. In this paper, we present a generalized framework for 3D II with arbitrary pickup surface geometry and randomly distributed sensor configuration. In particular, we...

Three dimensional imaging with randomly distributed sensors

Mehdi DaneshPanah, Bahram Javidi & Edward A. Watson
As a promising three dimensional passive imaging modality, Integral Imaging (II) has been investigated widely within the research community. In virtually all of such investigations, there is an implicit assumption that the collection of elemental images lie on a simple geometric surface (e.g. flat, concave, etc), also known as pickup surface. In this paper, we present a generalized framework for 3D II with arbitrary pickup surface geometry and randomly distributed sensor configuration. In particular, we...

Polarization-sensitive swept-source optical coherence tomography with continuous source polarization modulation

Masahiro Yamanari, Shuichi Makita & Yoshiaki Yasuno
We present fiber-based polarization-sensitive swept-source optical coherence tomography (SS-OCT) based on continuous source polarization modulation. The light source is a frequency swept laser centered at 1.31 µm with a scanning rate of 20 kHz. The incident polarization is modulated by a resonant electro-optic modulator at 33.3 MHz, which is one-third of the data acquisition frequency. The zeroth- and first-order harmonic components of the OCT signals with respect to the polarization modulation frequency have the polarimetric...

Polarization-sensitive swept-source optical coherence tomography with continuous source polarization modulation

Masahiro Yamanari, Shuichi Makita & Yoshiaki Yasuno
We present fiber-based polarization-sensitive swept-source optical coherence tomography (SS-OCT) based on continuous source polarization modulation. The light source is a frequency swept laser centered at 1.31 µm with a scanning rate of 20 kHz. The incident polarization is modulated by a resonant electro-optic modulator at 33.3 MHz, which is one-third of the data acquisition frequency. The zeroth- and first-order harmonic components of the OCT signals with respect to the polarization modulation frequency have the polarimetric...

Fizeau Fourier transform imaging spectroscopy: missing data reconstruction

Samuel T. Thurman & James R. Fienup
Fizeau Fourier transform imaging spectroscopy yields both spatial and spectral information about an object. Spectral information, however, is not obtained for a finite area of low spatial frequencies. A nonlinear reconstruction algorithm based on a gray-world approximation is presented. Reconstruction results from simulated data agree well with ideal Michelson interferometer-based spectral imagery. This result implies that segmented-aperture telescopes and multiple telescope arrays designed for conventional imaging can be used to gather useful spectral data through...

Fizeau Fourier transform imaging spectroscopy: missing data reconstruction

Samuel T. Thurman & James R. Fienup
Fizeau Fourier transform imaging spectroscopy yields both spatial and spectral information about an object. Spectral information, however, is not obtained for a finite area of low spatial frequencies. A nonlinear reconstruction algorithm based on a gray-world approximation is presented. Reconstruction results from simulated data agree well with ideal Michelson interferometer-based spectral imagery. This result implies that segmented-aperture telescopes and multiple telescope arrays designed for conventional imaging can be used to gather useful spectral data through...

Carrier-envelope phase measurement from half-cycle high harmonics

Pengfei Lan, Peixiang Lu, Fang Li, Yuhua Li & Zhenyu Yang
We present an efficient method to observe the high harmonics generated in individual half-cycle of the driving laser pulse by mixing a weak ultraviolet pulse, and then the cutoff of each half-cycle harmonic is imaged. The simulation shows that the information of the driving laser pulse, including the laser intensity, pulse duration and carrier-envelope phase, can be in situ retrieved from the harmonic spectrogram. In addition, our results show that this method also distinguishes the...

Carrier-envelope phase measurement from half-cycle high harmonics

Pengfei Lan, Peixiang Lu, Fang Li, Yuhua Li & Zhenyu Yang
We present an efficient method to observe the high harmonics generated in individual half-cycle of the driving laser pulse by mixing a weak ultraviolet pulse, and then the cutoff of each half-cycle harmonic is imaged. The simulation shows that the information of the driving laser pulse, including the laser intensity, pulse duration and carrier-envelope phase, can be in situ retrieved from the harmonic spectrogram. In addition, our results show that this method also distinguishes the...

Generation of vortex beams from lasers with controlled Hermite- and Ince-Gaussian modes

Takayuki Ohtomo, Shu-Chun Chu & Kenju Otsuka
We report selective excitations of higher-order Hermite-Gaussian and Ince-Gaussian (IG) modes in a laser-diode-pumped microchip solid-state laser and controlled generation of corresponding higher-order and multiple optical vortex beams of different shapes using an astigmatic mode converter (AMC). Simply changing the pump-beam diameter, shape, and lateral off-axis position of the tight pump beam focus on the laser crystal within a microchip semispherical cavity can produce the desired optical vortex beams in a well controlled manner. Pattern...

Generation of vortex beams from lasers with controlled Hermite- and Ince-Gaussian modes

Takayuki Ohtomo, Shu-Chun Chu & Kenju Otsuka
We report selective excitations of higher-order Hermite-Gaussian and Ince-Gaussian (IG) modes in a laser-diode-pumped microchip solid-state laser and controlled generation of corresponding higher-order and multiple optical vortex beams of different shapes using an astigmatic mode converter (AMC). Simply changing the pump-beam diameter, shape, and lateral off-axis position of the tight pump beam focus on the laser crystal within a microchip semispherical cavity can produce the desired optical vortex beams in a well controlled manner. Pattern...

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