Cell Phone
Mostrando 13-24 de 57 artigos, teses e dissertações.
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13. ANALYSIS OF A COMMERCIAL PORTABLE LITHIUM-ION BATTERY UNDER LOW CURRENT CHARGE-DISCHARGE CYCLES
The dependence between the transferred charge and the corresponding transference time to charge and discharge a portable cell phone Li-ion battery (LiCoO2/C) under cycles of low intensity currents was studied in detail. The voltage curve profile between 3.0 and 4.2 V and the charging and discharging time are strongly influenced by the applied current intensi
Quím. Nova. Publicado em: 2016-09
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14. Cell phone radiation effects on cytogenetic abnormalities of oral mucosal cells
The aim of this study was to evaluate the effects of exposure to cell phone electromagnetic radiation on the frequency of micronuclei, broken eggs cells, binucleated cells, and karyorrhexis in epithelial cells of the oral mucosa. The sample was composed of 60 cell phone users, who were non-smokers and non-drinkers, and had no clinically visible oral lesions.
Braz. oral res.. Publicado em: 20/10/2015
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15. Consumer Complaints and Company Market Value
Consumer complaints affect company market value and common sense suggests that a negative impact is expected. However, do complaints always negatively impact company market value? We hypothesize in this study that complaints may have a non-linear effect on market value. Positive (e.g. avoiding high costs to solve complaints) and negative (e.g. speedy and int
BAR, Braz. Adm. Rev.. Publicado em: 2014-09
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16. A new problem in inflammatory bladder diseases: Use of mobile phones!
Purpose Technological developments provide a lot of conveniences to our lives. This issue is one of the risks that arise along with these conveniences. In our study we tried to understand the impact of electromagnetic waves from mobile phones on bladder tissue. Materials and Methods Twenty-one adult male albino rats were divided into three equal groups.
Int. braz j urol.. Publicado em: 2014-08
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17. Synthesis of Co-Al-Cl LDH by cathodic material reprocessing from cellular phone batteries
The aim of this paper was the recovering of the cathodic material from discarded lithium ion batteries for obtainment of the lamellar double hydroxides (LDHs) by the co-precipitation method at variable pH in HCl and H2O2 1:1 (v/v) acid solution containing Co and Al (extracted from cathodic material composed of LiCoO2 and aluminum foil). These metals were pre
Mat. Res.. Publicado em: 29/04/2014
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18. Life cycle assessment of cell phones in Brazil based on two reverse logistics scenarios
This article is a result of a cell phone collection obtained at the Center for Information Technology Renato Archer (CTI) under the AMBIENTRONIC Program, an initiative that supports the Brazilian electronic sector in the development of technologies for sustainability. The objective of this article is to assess two reverse logistic scenarios of cell phones us
Prod.. Publicado em: 21/03/2014
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19. Avaliação de dispositivos de captura de imagens digitais para detecção colorimétrica em microzonas impressas
This report describes a study about the feasibility of using a conventional digital camera, a cell-phone camera, an optical microscope, and a scanner as digital image capture devices on printed microzones. An array containing nine circular zones was drawn using graphics software and printed onto transparency film by a laser printer. Due to its superior analy
Quím. Nova. Publicado em: 2014
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20. Photographs taken with cellphones in schools: portrait of a new school? A survey in the municipal schools of Florianopolis / Fotografias produzidas com celulares nas escolas: retrato de um novo ensino? Uma pesquisa na rede Municipal de ensino de FlorianÃpolis
This study aimed to investigate the presence of the cell phone and its recurrence for educational use in the municipal schools of Florianopolis - RME, collecting and analyzing data about the access and familiarity of students and teachers with digital media in the school environment of RME, and also verifying the status of the cell phone and the use of its p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2013
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21. Um estudo sobre o design, a implementação e a avaliação de interfaces flexíveis para idosos em telefones celulares / A research on design, implementation and evaluation of flexible interfaces for the elderly in mobile phones
A população idosa cresce no Brasil e cada vez mais se faz necessário desenvolver tecnologias de informação e comunicação adequadas a esse público. Com o barateamento dos telefones celulares, muitas famílias gostariam que seus idosos fossem usuários desses dispositivos visando ter contato com os mesmos quando esses estão fora de suas casas. No enta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/04/2012
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22. Tecnologias móveis na educação
The use of the mobile technology has caused several changes in all segments of society. Due to their being inserted in peoples lives, the digital mobile devices cause changes in the way people communicate, interact, work, purchase, entertain and learn. In search for greater flexibility, convenience and mobility, society has increasingly taken control of the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2011
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23. Contribuição para os usuários de sistemas CAD/CAM/CNC em operação de fresamento de topo em aço para moldes e matrizes / Contribution to the users of systems CAD/CAM/CNC in end milling operation in steel for molds and dies
The increased in the demand for plastic products and the need for reduction manufacturing times, and the growing dependence of man on the computer in present day, especially in manufacturing activities, has resulted in constant research of technological developments in order to supply these needs. In dies and molds manufacturing industry for plastic injectio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/06/2011
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24. Cell phones and male infertility: a review of recent innovations in technology and consequences
Cell phones have become a vital part of everyday life. However, the health risks associated with their usage are often overlooked. Recently, evidence from several studies supports a growing claim that cell phone usage may have a detrimental effect on sperm parameters leading to decreased male fertility. Nonetheless, other studies showed no conclusive link be
International braz j urol. Publicado em: 2011-08