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Strain and Temperature Characterization of LPGs Written by CO2 Laser in Pure Silica LMA Photonic Crystal Fibers

Photonic Sensors 2015年第3期5卷 241-250页

作者： Roberta Cardoso CHAVES alexandre de almeida prado pohl Ilda ABE Renan SEBEM Aleksander PATERNO Laboratorio Avangado de Telecomunicacoes Federal University of Technology Parancl Brazil Laboratorio de Fot6nica Federal University of Technology Parana Brazil Laboratory of Optoeleetronic Systems Santa Catarina State University Santa Catarina Brazil

This paper reports on the writing of long period gratings （LPGs） in a six-ring pure silica solid core, and large mode area photonic crystal fiber （fiber core diameter p = 10.1 μm） using a CO2 laser system, and the characterization of their strain and temperature sensitivities. Temperature and strain sensitivities in the order of-19.6pm/℃ and -88 pm/με, respectively, were obtained, which were comparable or surpassed values of the similar photonic crystal fiber （PCF）-based LPG or sensor configurations found in the literature.

关键词： Long period grating photonic crystal fiber CO2 laser

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Scar Acceleration Method—MAC^® in the Treatment of Chronic Wounds in Lymphedema: Case Report

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Open Journal of Regenerative Medicine 2022年第4期11卷 63-76页

作者： Marcus Vinicius de Mello Pinto Aline Ronis Sampaio Miriam Viviane Baron Angela Gonçalves Marx Esteban Fortuny Francisco Javier Millan Martínez Alessandra Fernandes de Lima Thais do prado Pessanha Passos alexandre Gomes Sancho Celulare Institute Petrópolis Brazil Program in Medicine and Health Sciences of the Pontifical Catholic University of Rio Grande do Sul (PUC/RS) Porto Alegre Brazil Faculty of Medicine of USP Sao Paulo Brazil Universidad Finis Terrae Santiago Chile Hospital Viamed Virgen de la Paloma Madrid Spain Clinilar Belo Horizonte Brazil Oncology Physiotherapy by ABFO COFFITO Brazil Physiotherapy Course Grande Rio University Duque de Caxias Brazil Augusto Motta University Center (UNISUAM) Rio de Janeiro Brazil

Wounds are a serious public health problem in our country. Access to effective, low-cost treatment is still far from the reality for many patients leading to a chronic and serious condition. They interfere in the quality of life of these individuals who isolate themselves socially constrained by the appearance of their wounds. The report shows the case of a patient with type II diabetes mellitus, with chronic wounds in lymphedema in the lower limbs who was treated with the Scar Acceleration Methodology associated with Complex decongestive Therapy, leading to an improvement in her social participation and quality of life.

关键词： Lympedema Wound Healing Diabetes Mellitus Complication

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Advances and New Applications Using the Acousto-Optic Effect in Optical Fibers

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Photonic Sensors 2013年第1期3卷 1-25页

作者： alexandre A. P. pohl Roberson A. OLIVEIRA Ricardo E. DA SILVA Carlos A. F. MARQUES Paulo de Tarso NEVES JR. Kevin COOK John CANNING Rogério N. NOGUEIRA3 Advanced Telecommunications Laboratory Federal University of Technology - Paraná Curitiba Brazil Volvo GTT Advanced Technology & Research Curitiba Brazil Instituto de Telecomunicagōes P6lo de Aveiro 3810-193 Aveiro Portugal Interdisciplinary Photonics Labs School of Chemistry University of Sydney New South Wales 2006 Australia

This work presents a short review of the current research on the acousto-optic mechanism applied to optical fibers. The role of the piezoelectric element and the acousto-optic modulator in the excitation of flexural and longitudinal acoustic modes in the frequency range up to 1.2 MHz is highlighted. A combination of the finite elements and the transfer matrix methods is used to simulate the interaction of the waves with Bragg and long period gratings. Results show a very good agreement with experimental data. Recent applications such as the writing of gratings under the acoustic excitation and a novel viscometer sensor based on the acousto-optic mechanism are discussed.

关键词： Acousto-optics fiber gratings optical fibers optical sensors

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腐植酸与二价阳离子的相互作用

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腐植酸 2013年第5期 33-36页

作者： alexandre G.S.prado Claudio Airoldi 张志国巴西利亚大学化学研究所墨西哥联邦区70919 坎皮纳斯州立大学化学研究所圣保罗13083 华东理工大学化学与分子工程学院上海200237

研究了水溶液中二价阳离子(Cu、Ni、Co和Zn)与商业化腐植酸(HAAl)和泥炭腐植酸(HAPs)的相互作用。研究采用修正的兰缪尔方程拟合了一系列吸附等温曲线。实验发现,HAAl对前述金属离子的最大吸附摩尔数分别为0.55±0.02 mmol/g,0.66±0.02... 详细信息

研究了水溶液中二价阳离子(Cu、Ni、Co和Zn)与商业化腐植酸(HAAl)和泥炭腐植酸(HAPs)的相互作用。研究采用修正的兰缪尔方程拟合了一系列吸附等温曲线。实验发现,HAAl对前述金属离子的最大吸附摩尔数分别为0.55±0.02 mmol/g,0.66±0.02 mmol/g,0.54±0.02 mmol/g,0.40±0.02 mmol/g,HAPs对它们的最大吸附摩尔数分别为:0.63±0.03 mmol/g,0.61±0.06 mmol/g,0.55±0.02 mmol/g,0.54±0.03 mmol/g。对于相同的序列,HAAl和HAPS之间的相互作用所吸收的热量值分别为2.4±1.0 mmol/g,8.4±0.9 mmol/g,18.3±0.9 mmol/g,10.6±0.9 kJ/mol,和18.4±1.2 mmol/g,15.9±1.4 kJ/mol,15.4±1.2 kJ/mol,15.0±1.2 kJ/mol。由于吉布斯自由能为负,离子络合作用过程必然伴随着熵的增加。

关键词：腐植酸热力学数据二价阳离子吸附

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Geo-environmental parametric 3D models of SARS-CoV-2 virus circulation in hospital ventilation systems

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Geoscience Frontiers 2022年第6期13卷 244-256页

作者： Carla Gabriela Carlot Zorzi Alcindo Neckel Laércio Stolfo Maculan Grace Tibério Cardoso Leila Dal Moro alexandre almeida del Savio Leopoldo D.Z.Carrasco Marcos L.S.Oliveira Eliane Thaines Bodah Brian William Bodah Faculdade Meridional IMED304-Passo Fundo-RS 99070-220Brazil Universidad de Lima Avenida Javier Prado Este 4600–Santiago de Surco 1503Peru department of Civil and Environmental.Universidad de la Costa CUCCalle 58#55–66BarranquillaAtlánticoColombia State University of New York Onondaga Community College4585 West Seneca TurnpikeSyracuseNY 13215USA Thaines and Bodah Center for Education and development 840 South Meadowlark LaneOthelloWA 99344USA

The novel coronavirus, SARS-CoV-2, has the potential to cause natural ventilation systems in hospital environments to be rendered inadequate, not only for workers but also for people who transit through these environments even for a limited duration. Studies in of the fields of geosciences and engineering,when combined with appropriate technologies, allow for the possibility of reducing the impacts of the SARS-CoV-2 virus in the environment, including those of hospitals which are critical centers for healthcare. In this work, we build parametric 3D models to assess the possible circulation of the SARS-CoV-2 virus in the natural ventilation system of a hospital built to care infected patients during the COVID-19 pandemic. Building Information Modeling(BIM) was performed, generating 3D models of hospital environments utilizing Revit software for Autodesk CFD 2021. The evaluation considered dimensional analyses of 0°, 45°, 90° and 180°. The analysis of natural ventilation patterns on both internal and external surfaces and the distribution of windows in relation to the displacement dynamics of the SARS-CoV-2 virus through the air were considered. The results showed that in the external area of the hospital, the wind speed reached velocities up to 2.1 m/s when entering the building through open windows. In contact with the furniture, this value decreased to 0.78 m/s. In some internal isolation wards that house patients with COVID-19, areas that should be equipped with negative room pressure, air velocity was null. Our study provides insights into the possibility of SARS-CoV-2 contamination in internal hospital environments as well as external areas surrounding hospitals, both of which encounter high pedestrian traffic in cities worldwide.

关键词： COVID-19 global epidemic Dimensional analysis Wind velocity Hospital environment Contamination

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