Revista Brasileira de Aplicações de Vácuo最新文献_第2页

Assembly of UV-Ozone Reactor to Combat of Coronavirus and Other Pathogenic Microorganisms 抗击冠状病毒及其他病原微生物的uv -臭氧反应器组装

Revista Brasileira de Aplicações de Vácuo Pub Date : 2021-11-15 DOI: 10.17563/rbav.v40.1214

E. R. Santos, Juliana Aparecida Vendrami, Antonio Celso Duarte, E. C. Burini Júnior, R. Onmori, W. Hui

{"title":"Assembly of UV-Ozone Reactor to Combat of Coronavirus and Other Pathogenic Microorganisms","authors":"E. R. Santos, Juliana Aparecida Vendrami, Antonio Celso Duarte, E. C. Burini Júnior, R. Onmori, W. Hui","doi":"10.17563/rbav.v40.1214","DOIUrl":"https://doi.org/10.17563/rbav.v40.1214","url":null,"abstract":"The contamination on the surface of objects caused by: fungi, microbes, bacteria and viruses (and also coronavirus) can be solved using UV rays and/or ozone gas. For this reason, a UV-Ozone reactor apparatus with low cost was mounted to test two different types of HID (high intensity discharge) lamps: high pressure mercury vapor lamp (HPMVL) and metal halide lamp (MHL), both with nominal power of 400 watts and E-40 (base, screw) were studied as possible method of disinfection. Each lamp used the respective electromagnetic ballasts and both were manufactured by Osram Company. These lamps have two bulb types: the outer bulb which was removed and it is responsible for filtering the ultraviolet wavelengths and the internal bulb (where there is mercury, argon or metal halide confined at high pressure) that is the main source of ultraviolet rays. The complete apparatus was assembled using: aluminum reflector (used as a chamber), two microcomputer fans and a wooden base covered by an aluminum foil. A rubber strip was placed at the edge of the reflector for better adhesion on the aluminum foil (for better confinement ozone gas). The ozone concentration inside the reactor was measured with a monitor, the temperatures were measured near lamps with a thermocouple and a spectroradiometer with optical fiber was used to obtain the wavelengths. The results revealed to the elapsed time of 2 minutes a maximum peak of ozone concentration of 23 ppm for LVMAP, while the MHL presented 4.5 ppm only. The temperature obtained by HPMVL was lower with 31.5 ºC, while the MHL presented 48.0 ºC. The HPMVL presented higher amount of wavelengths at the ranges: UV-A, UV-B and UV-C, while the MHL presented only UV-A. For these reasons, it is suggested to be most promissory the use of HPMVL to combat the coronavirus and other pathogenic microorganisms.","PeriodicalId":237166,"journal":{"name":"Revista Brasileira de Aplicações de Vácuo","volume":"308 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123330221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lifetime and optical analyses of LED lamps LED灯的寿命和光学分析

Revista Brasileira de Aplicações de Vácuo Pub Date : 2021-08-30 DOI: 10.17563/rbav.v40i1.1208

E. R. Santos, Hélio Akira Furuya, E. C. Burini Júnior

{"title":"Lifetime and optical analyses of LED lamps","authors":"E. R. Santos, Hélio Akira Furuya, E. C. Burini Júnior","doi":"10.17563/rbav.v40i1.1208","DOIUrl":"https://doi.org/10.17563/rbav.v40i1.1208","url":null,"abstract":"In this study, optical and lifetime analyses of commercial light-emitting diode (LED) lamps were carried out with the objective to better understand these characteristics. Lamps of different manufacturers and powers were used: Ourolux of 9 watts, Kian of 9 watts, Black+Decker of 9 watts, FLC of 8 watts, Galaxy of 7 watts and Brilia of 7 watts. These LED lamps remained on by 24 hours/day for 4,291.16 hours. Illuminance measurements were analyzed once a week by each lamp inside the integrating sphere with a sensor of lux meter coupled. Results showed decrease of illuminance by elapsed time, due to the degradation. Results of the illuminance obtained between the initial moment of the experiment and the final one were calculated, revealing degradation of 19% to Ourolux, 20% to FLC, 26% to Black+Decker, 28% to Kian, 29% to Galaxy and 33% to Brilia. This study suggests that the diffusers can have different transmittance values interfering on the illuminance, since the FLC LED lamp presented illuminance with highest values than the other LED lamps tested with similar electrical and optical characteristics. This experiment showed that the nominal power of the LED lamp has no direct relation to the illuminance and, comparing the lifetime, the LED lamp manufactured by Black+Decker was the only one to reach 5,521 hours, that is a lifetime much shorter than the one described at the packages (25,000 hours) for all LED lamps tested","PeriodicalId":237166,"journal":{"name":"Revista Brasileira de Aplicações de Vácuo","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124464094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Circular economy of ITO thin films deposited on glass obtained from degraded OLED devices 降解OLED器件玻璃上沉积ITO薄膜的循环经济性

Revista Brasileira de Aplicações de Vácuo Pub Date : 2021-08-30 DOI: 10.17563/rbav.v40i1.1209

E. R. Santos, Lucas Henrique Silva de Jesus, E. C. Burini Júnior, R. Onmori, W. Hui

{"title":"Circular economy of ITO thin films deposited on glass obtained from degraded OLED devices","authors":"E. R. Santos, Lucas Henrique Silva de Jesus, E. C. Burini Júnior, R. Onmori, W. Hui","doi":"10.17563/rbav.v40i1.1209","DOIUrl":"https://doi.org/10.17563/rbav.v40i1.1209","url":null,"abstract":"In this work, circular economy was investigated for commercial indium tin oxide (ITO) thin films deposited on glass substrates obtained from degraded organic light-emitting diodes (OLED). These devices were assembled and polarized at laboratory in a previous work. For each substrate, with geometry 2.5 × 2.5 cm, four OLEDs with active area of 3 × 3 mm were set up. These OLED devices were assembled with ITO as the electrode anode and successive depositions of other materials (layer-by-layer), to form the complete structure. To obtain the recovered ITO, all layers were removed from the samples containing the OLEDs previously mounted, remaining only the ITO thin films, that were cleaned with commercial product together with the received ITO/glass samples. Both samples were compared using some techniques, such as: colorimetry, electrical resistance, and Raman spectroscopy. A methodology with light-emitting diode (LED) device polarized emitting light crossing the ITO thin films was used, and the luminance with chromaticity coordinates was obtained, revealing the good transparency of the thin films. Electrical resistance of recovered ITO revealed five higher orders of magnitude in comparison to the one of received ITO. This fact can be tributed to a poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) layer, causing corrosion of the ITO thin films during the assembly of OLEDs or loss of the field lines created during the electrical measurements by probes of four-point probe. Raman spectroscopy did not show satisfactory results in the chemical composition analyses of the samples, but it indicated good cleaning process of the samples before the analyses.","PeriodicalId":237166,"journal":{"name":"Revista Brasileira de Aplicações de Vácuo","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123206476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Different electrode anodes used in OLED devices Diferentes eletrodos anodos usados em dispositivos OLEDs OLED设备中使用的不同电极阳极OLED设备中使用的不同电极阳极

Revista Brasileira de Aplicações de Vácuo Pub Date : 2021-03-22 DOI: 10.17563/RBAV.V40.1205

E. R. Santos, T. Fullenbach, M. Medeiros, L. Zambom, R. Onmori, Shu Hui Wang

{"title":"Different electrode anodes used in OLED devices Diferentes eletrodos anodos usados em dispositivos OLEDs","authors":"E. R. Santos, T. Fullenbach, M. Medeiros, L. Zambom, R. Onmori, Shu Hui Wang","doi":"10.17563/RBAV.V40.1205","DOIUrl":"https://doi.org/10.17563/RBAV.V40.1205","url":null,"abstract":"Transparent conductive oxides (TCOs) known as indium tin oxide (ITO) and fluorine tin oxide (FTO) deposited on glass were compared by different techniques and also as anodes in organic light-emitting diode (OLED) devices with same structure. ITO produced at laboratory was compared with the commercial one manufactured by different companies: Diamond Coatings, Displaytech and Sigma-Aldrich, and FTO produced at laboratory was compared with the commercial one manufactured by Flexitec Company. FTO thin films produced at laboratory presented the lowest performance measured by Hall effect technique and also by I-V curve of OLED device with low electrical current and high threshold voltage. ITO thin films produced at laboratory presented elevated sheet resistance in comparison with commercial ITOs (approximately one order of magnitude greater), that can be related by a high number of defects as discontinuity of the chemical lattice or low crystalline structure. In the assembly of OLED devices with ITO and FTO produced at laboratory, neither presented luminances. ITO manufactured by Sigma-Aldrich company presented better electrical and optical characteristics, as low electrical resistivity, good wettability, favorable transmittance, perfect physicalchemical stability and lowest threshold voltage (from 3 to 4.5 V) for OLED devices.","PeriodicalId":237166,"journal":{"name":"Revista Brasileira de Aplicações de Vácuo","volume":"390 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115208431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Monte Carlo approach for predicting aircraft detection by MANPADS 预测单兵携带防空系统探测飞机的蒙特卡洛方法

Revista Brasileira de Aplicações de Vácuo Pub Date : 2020-12-28 DOI: 10.17563/rbav.v39i3.1187

Caio Augusto de Melo Silvestre, Eduarda de Proença Rosa Campos

引用次数: 0

Desenvolvimento de um modelo de equações estruturais simultâneas para avaliação da qualidade de serviço em aeroportos 建立机场服务质量评价的同时结构方程模型

Revista Brasileira de Aplicações de Vácuo Pub Date : 2020-12-28 DOI: 10.17563/rbav.v39i3.1176

Eliézer Mello de Souza, Anderson Ribeiro Correia

引用次数: 1

Design of DES encryption algorithm as bundleddata asynchronous pipeline using FPGA 基于FPGA的捆绑式数据异步管道DES加密算法设计

Revista Brasileira de Aplicações de Vácuo Pub Date : 2020-12-28 DOI: 10.17563/rbav.v39i3.1179

Diego A. Silva, D. L. Oliveira, G. Batista

引用次数: 0

Estudo preliminar teórico de filtro compressor de pulso totalmente fotônico

Revista Brasileira de Aplicações de Vácuo Pub Date : 2020-12-28 DOI: 10.17563/rbav.v39i3.1177

André Paim Gonçalves, R. M. Richter, Felipe Streitenberger Ivo, Alessandro Roberto dos Santos, Robson Ribeiro Carreira, Olympio Lucchini Coutinho

引用次数: 0

Microwave photonic radar warning receiver: airborne antenna over fiber optic 微波光子雷达预警接收机:光纤机载天线

Revista Brasileira de Aplicações de Vácuo Pub Date : 2020-12-28 DOI: 10.17563/rbav.v39i3.1183

Paulo Henrique Kiohara Acyoli Bastos, Felipe Streitenberger Ivo, Olympio Lucchini Coutinho

{"title":"Microwave photonic radar warning receiver: airborne antenna over fiber optic","authors":"Paulo Henrique Kiohara Acyoli Bastos, Felipe Streitenberger Ivo, Olympio Lucchini Coutinho","doi":"10.17563/rbav.v39i3.1183","DOIUrl":"https://doi.org/10.17563/rbav.v39i3.1183","url":null,"abstract":"Electronic warfare had great importance mainly in the Second World War. Radar was one of the greatest inventions in the area at that time, reinventing the way war was viewed until then. Nowadays, modern combat aircraft has sophisticated warfare systems. One of them is known as radar warning receiver (RWR), responsible for alerting pilots to possible radar detection and guiding the direction in which it is being radiated. Technological innovations allowed the interaction of the microwave and optoelectronics area, leading to an area known as microwave photonics (MWP). This article presents a photonic link to replace the copper cables used by RWR systems, applying photonic technology in order to improve performance and benefit from the intrinsic characteristics that optical fiber offers to the system, offering a totally passive remote system, in which only one phase modulator is connected to the RWR antenna. The results obtained for a totally photonic link by experiment were satisfactory. As expected, a gain above the unit was obtained. However, the observed noise figure was higher than expected, which ended up resulting in a lower signal noise ratio.","PeriodicalId":237166,"journal":{"name":"Revista Brasileira de Aplicações de Vácuo","volume":"24 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124665835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proposal of anti-radiation missile decoy assisted by microwave photonics 微波光子学辅助反辐射导弹诱饵的设计

Revista Brasileira de Aplicações de Vácuo Pub Date : 2020-12-28 DOI: 10.17563/rbav.v39i3.1178

Andre P. Goncalves, Renan Richter, F. Ivo, A. R. Santos, R. R. Carreira, O. Coutinho

引用次数: 0