This thesis investigates embedded databases and graphical interfaces for the MicroBaseJ project. The project aim is the development of an integrated database and GUI user interface for a typical 3G, or 2.5G, mobile phone with Java MIDP2 capability. This includes methods for data acquisition, mobile data and information communication, data management, and remote user interface. Support of phone delivered informatics will require integrated server and networking infrastructure research and development to support effective and timely delivery of data for incorporation in mobile device-based informatics applications. A key research and development (R&D) challenge is to support effective and timely delivery of data for incorporation in mobile device-based informatics applications. Another important aspect of the project is determining how to develop efficient graphics for the small mobile screen. The research investigates and analyses the architecture of a mobile monitoring system. The project developed a generic solution that can be implemented in a number of commercial sectors, such as horticulture, building management and pollution/water management. The developed concept is tested using data relevant to the horticultural area of application. The system also addresses the main issues related to mobile monitoring, including real-time response, data integrity, solution cost, graphical presentation, and persistent storage capabilities of modern mobile devices. Four embedded databases based on J2ME have been investigated. Two of the four have been evaluated and analysed. The Insert function, Sequence Search, and Random Search of Perst List and RMS (Record Management System) databases have been tested. The size of the processed data was limited to 20,000 records when using the wireless toolkit simulator, and 11,000 records when using a mobile phone. Perst Lite reflects good performance and has out-performed RMS in all tests. User interface software such as J2ME Polish for mobile phones has been investigated. Custom J2ME class for graphical interface is developed. This provides the graphical presentation of the data collected from the sensors; including temperature, wind speed, wind direction, moisture, and leaf wetness. The graphical interface, bar charts, and line charts with trace ball for collected data have been designed and implemented. The embedded database performance and project performance have been investigated and analysed. The performances of Perst Lite and RMS are evaluated in terms of the insert, sequence search, and random search functions based on simulation and real devices. The record numbers vary from 1,000 to 20,000. The project performance contains data receiving and storage, and data presentation and configuration. The performance of data storage and configuration can be negated due to the running mode and the response time. Thus, data presenting performance is the key focus in this project. This performance was divided into the categories of initial, data search, data selection, and charting. The initial performance includes the initialisation of the project parameters, and the reaching of the welcome interface. Data search performance refers to the retrieval of the specified data from the embedded database, measured on 48 data points, which only can be presented on the mobile screen from the retrieved data. These four performance types are measured in thousands of record numbers, varying from 1,000 to 18,000 record numbers, with the retrieved data range varying from 1 day to 30 days.

Objectives: This study identifies modern information technologies that can improve the clinical practice of Picture Archiving and Communication Systems (PACS) and determines the approaches that are needed to improve the functionality of current PACS to provide better next generation PACS and to improve the future of radiology practices and workflow with future PACS generations. Method: A parallel mixed method approach was adopted including qualitative method (semi-structured interviews), quantitative method (questionnaire survey) and observation of online discussion groups on PACS. Five databases were searched to find salient literature, including Science Direct, Springer Link, Scopus, CINAHL Plus and Google Scholar. Six radiologists were interviewed and questionnaires were collected from 120 radiologists. Four online discussion groups related to PACS were monitored via LinkedIn. The data were analysed thematically using the thematic analysis method. Finally, a focus group was held with a separate group of radiologists to validate the findings. Results: Eight themes emerged from the thematic analysis of the data: (1) limitations of traditional PACS; (2) user needs and requirements that can increase PACS functionality; (3) Web based solutions of PACS; (4) PACS on mobile phones; (5) Vendor Neutral Archive (VNA); (6) full integration of voice recognition in PACS; (7) backup solutions for the system and (8) continuous training for PACS users. Discussion: With the development of healthcare information and communication technology (ICT) and with the increased demands of the radiologists to expand PACS usability, traditional PACS must be updated to follow the changes. Modern technologies can provide better solutions to enhance the functionality of current PACS. The next generation of PACS can fulfil the future requirements of users. This study considers the issues between the needs and requirements of the users of a PACS system in the future and the developing solutions in ICT and the PACS industry. Moreover, highly developed PACS systems with advanced features will have a direct impact in changing and improving radiology workflow. Accordingly, a model has been developed that proposes new features for the next generation PACS system, which may be applied to the next generation radiology practice. The model was validated with the focus group and, by using a separate group of radiologists in another country, was determined to be generalisable. Conclusion: It is widely recognised that traditional PACS must be updated to adopt recent advances in ICT. This research has identified themes that, when incorporated, will enhance the functionality of PACS and radiology workflow and provide better quality clinical practice. The findings from this empirical research can be used: as recommendations to vendors; for technology development; and by medical institutes to consider aspects when undertaking implementation of PACS and training future radiologists. Keywords: 'Picture archiving and communication system’, PACS, Future trends, next generation, Organisational efficiency, Productivity, Clinical practice, Ubiquitous.

Mobile phone usage involves the mobile phone, the telecommunications system, mobile phone users, and the adoption and use of the system. Mobile communications is a complex and rapidly changing industry consisting of the hardware, software, network and business aspects. Mobile phone users are influenced by demographic, social, cultural and contextual factors that complicate the understanding of mobile phone usage. Advances in technology and market competition drive the addition of new services and features. In contrast, human cognition and attention are more constrained and many users find it difficult to cope with the cognitive demands of mobile phone technology. The aim of this study is to develop a model for representing the influence of motivational needs and cultural factors on mobile phone usage variety. The link between motivational needs and mobile phone usage variety, the cultural factors that influence mobile phone usage variety, as well as usage spaces as an approach to representing usage variety, are researched. The research encompasses a literature study, structured interviews, a pilot study and a survey. The pilot study and survey yielded data about mobile phone usage of university students under the age of 30 in South Africa. The results from the statistical analysis were triangulated with the findings of the literature study and the observations made about mobile phone usage during this two-year period. A final survey was conducted to verify the model. The contribution of this study is a mobile phone technology usage model (MOPTUM) for representing the motivational and cultural factors that influence mobile phone usage variety in such a way that users can use the model to express their mobile phone usage needs in non-technical terms while marketers and designers can use the model to convert the expressed user needs into the features required. MOPTUM draws on concepts and models from sociology, computer-supported cooperative work, human-computer interaction and technology adoption models from the field of marketing. MOPTUM verifies some existing findings on mobile phone usage and then integrates and extends these existing models to provide a new model for understanding the motivational and cultural factors that influence mobile phone usage variety. / Computing / Ph. D. (Computer Science)

The aim of this thesis was to do consumer behaviour research on the electronics market. This thesis is specialized on the mobile phone market. According to the results of consumer research were proposed the recommendations for improving the current situation. These were made by O2 Czech Republic.

This thesis combines topic of augmented reality with tourism. For analyzing the state of the use of augmented reality was composed case studies. It was created product, which is called Guide to mobile phone.

Submitted by Haroudo Xavier Filho (haroudo.xavierfo@ufpe.br) on 2016-03-01T14:13:14Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Sandra Chacon Dissertação Mestrado.pdf: 7070042 bytes, checksum: 60fe7ecc17946cd79d4d9e6e1cb4fa96 (MD5) / Made available in DSpace on 2016-03-01T14:13:14Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Sandra Chacon Dissertação Mestrado.pdf: 7070042 bytes, checksum: 60fe7ecc17946cd79d4d9e6e1cb4fa96 (MD5) Previous issue date: 2015-02-24 / O principal problema desta pesquisa - como a interface com o software está interferindo na interface com o hardware no uso de aparelhos celulares - é abordado através de uma metodologia de detalhamento dos diferentes estilos de interação dos aparelhos, seguindo alguns passos, que foram: o estudo da usabilidade de software e hardware, em que se verifica a importância da aplicação prática da ergonomia, o desenvolvimento da tecnologia e como ela influenciou a comunicação através de dispositivos móveis, a intervenção do software na mudança brusca do formato dos aparelhos, interrompendo a tendência de miniaturização dos aparelhos que permaneceu até final da década de noventa, compreensão do contexto de uso dos celulares e interpretação das expectativas geradas nos usuários com relação ao lançamento de cada novo modelo. Esses passos foram decisivos para compreender como a usabilidade de software e hardware se interpõem uma a outra, alterando o tamanho e formato dos aparelhos, percepção, expectativas e a interação com os usuários. / The main problem of this research - how the interface with the software is interfering in the interface with the hardware in the use of mobile phones - is approached through a methodology of detailing of different styles of interaction of the cellphones, following some steps: the study on the usability of software and hardware, where the importance of the practical application of ergonomics is perceived, the development of technology and how it influenced the communication through mobile devices, the intervention of software in the sudden change of the format of the appliances, interrupting the trend of miniaturization of devices that remained until the late 1990s, understanding the context of use of cellphones, interpretation of the expectations generated on users with respect to the release of each new model. These steps were crucial to understand how the usability of software and hardware stand each other , changing the size and shape of the devices , perception, expectations and interaction with users.

Submitted by (lucia.rodrigues@ufrpe.br) on 2016-09-21T12:48:54Z No. of bitstreams: 1 Diogo Francisco Borba Rodrigues.pdf: 1924185 bytes, checksum: 9fc99c1e969769f5429de4703c66669d (MD5) / Made available in DSpace on 2016-09-21T12:48:54Z (GMT). No. of bitstreams: 1 Diogo Francisco Borba Rodrigues.pdf: 1924185 bytes, checksum: 9fc99c1e969769f5429de4703c66669d (MD5) Previous issue date: 2013-02-21 / Models and software have been developed for irrigation management, however they don’t reach small farmers due to technical and economic limitations. This study aimed to develop tools for irrigation management using mobile phone, a technology already assimilated by society. The first tool called IGmanejo sends SMS to farmers with area’s name, irrigation depth and run time. The second tool is a Java application for mobile phone (mobile IGmanejo), which support irrigation management to farmers who have irrigation evaporimeter tank and rain gauge. This paper intend support a public policy of rational use of water in the semiarid region of Brazil, since it is free to farmer and may solve the current gap in irrigation technical assistance. Training curse to be able software use, climate monitoring equipment and sensitization of farmers to adopt such technology are essential points to success on farm. This software was evaluated according to water saving to growing cabbage crop, under three different seasons. The management simulations were done on a small farm, in Pernambuco state. Irrigation depth send by SMS IGmanejo water saving in 20% compared to reference software CropWat (FAO). For mobile IGmanejo were done two simulations of irrigation, using data from gauge evaporimeter tank (Class A) and using simplified tank, and also compared with those obtained by IGmanejo SMS. The results did not present statistically significant differences, confirming that the farmer may use more economical methods to estimate evapotranspiration (like simplified tank) instead of class A tank, which has high cost. The software showed that it is able to reduce of use of water on agriculture going to remote regions to support irrigation management with simplicity and quality. / Diversos modelos e software têm sido desenvolvidos para o manejo de irrigação, no entanto eles não conseguem atingir pequenos agricultores devido a limitações técnicas e econômicas. O presente trabalho teve por objetivo desenvolver ferramentas de manejo de irrigação utilizando telefone celular, uma tecnologia já assimilada pela sociedade. A primeira ferramenta chamada de IGmanejo que envia SMS com o nome da área, a lâmina e o tempo de irrigação para agricultores previamente cadastrados. A segunda ferramenta é um aplicativo Java para telefone celular (IGmanejo mobile), que orienta o manejo de irrigação para agricultores que possuam tanque evaporimétrico e pluviômetro. Este trabalho pretende auxiliar na definição de uma política pública do uso racional de água no semiárido do Brasil, uma vez que não terá custo para o agricultor e, poderá auxiliar a lacuna existente hoje na assistência técnica especializada em irrigação no nordeste. Cursos de capacitação para uso do software, dos equipamentos de monitoramento climático e de sensibilização dos agricultores em adotar tal tecnologia são essenciais para a chegada com êxito dessa ferramenta no campo. Os softwares propostos neste trabalho foram validados de acordo com a economia de água obtida durante o ciclo da cultura do repolho, onde o início do cultivo foi simulado em três diferentes épocas do ano. As simulações de manejo foram realizadas em uma área de agricultura familiar situada no município de Pesqueira-PE. A lâmina de irrigação do IGmanejo SMS obteve 20% de economia de água quando comparada com a lâmina obtida pelo software de referência CropWat da FAO. Para o aplicativo IGmanejo mobile foram realizadas duas simulações de lâminas de irrigação, uma utilizando dados de tanque classe A e outra utilizando dados do tanque alternativo (classe B), e ainda foram comparadas com as lâminas obtidas do IGmanejo SMS. Os resultados não diferiram estatisticamente entre si, ratificando o fato de que o agricultor pode recorrer a métodos mais econômicos para estimativa da evapotranspiração com auxílio de tanques alternativos ao invés do tanque classe A, que possui custo elevado. Os softwares propostos mostraram que são capazes de reduzir o desperdício de água na agricultura e levar até áreas remotas a orientação para um manejo de irrigação com simplicidade e qualidade.

Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-09-09T13:20:05Z No. of bitstreams: 1 luizcarlosdecairesjunior.pdf: 1221822 bytes, checksum: f995937ad7d8db36ef8169850e5064e2 (MD5) / Approved for entry into archive by Diamantino Mayra (mayra.diamantino@ufjf.edu.br) on 2016-09-13T14:27:58Z (GMT) No. of bitstreams: 1 luizcarlosdecairesjunior.pdf: 1221822 bytes, checksum: f995937ad7d8db36ef8169850e5064e2 (MD5) / Made available in DSpace on 2016-09-13T14:27:58Z (GMT). No. of bitstreams: 1 luizcarlosdecairesjunior.pdf: 1221822 bytes, checksum: f995937ad7d8db36ef8169850e5064e2 (MD5) Previous issue date: 2011-02-22 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Nos últimos anos, o sistema de telecomunicação móvel tem crescido significativamente, de modo que um sexto da população mundial, mais de um bilhão de pessoas, utiliza este tipo de telefone (National Radiological Protection Board, 2004; Maier, 2006). No Brasil, em 2011, já há mais de 202,9 milhões de habilitações de celulares, uma densidade de 104,68 acessos para cada 100 habitantes (Anatel, 2011). Estudos sobre os efeitos da radiação emitida por telefones celulares sobre o organismo são escassos, os resultados são contraditórios e feitos em cultura de células ou em células recém retiradas do indivíduo para posterior exposição à radiação. Desta maneira, os objetivos deste trabalho foram estabelecer um modelo animal para o estudo do efeito da radiação eletromagnética emitida por aparelhos celulares sobre a fisiologia de ratos e avaliar a ação deste tipo de radiação sobre a expressão e atividade de ERK 1 e ERK 2 e a expressão de isoforma alfa de PKC em hipófise de ratos. Foram utilizados ratos Wistar machos com 60 dias de idade. A fonte de radiação foi um aparelho celular com freqüência de 1800 MHz. Foram estabelecidos 4 grupos experimentais: 1- animais expostos por período de 1h; 2- animais expostos por 3h; 3- animais expostos por 3 dias; 4- animais expostos por 10 dias. Nos experimentos de 3 e 10 dias, a exposição foi de 25 segundos a cada 2 min. Cada grupo experimental foi acompanhado de grupo controle. Foram medidas a capacidade da radiação atravessar os ossos cranianos dos animais de experimentação e a capacidade de aquecer a água sob a calota craniana. Foram avaliados os efeitos da radiação emitida pelo aparelho celular sobre a expressão e atividade de ERK 1 e ERK 2, e a expressão da isoforma alfa de PKC em células da hipófise. A radiação atravessa a calota craniana. A 3 cm de distância ela não impõem qualquer barreira a essa passagem. Não foi observado efeito da radiação sobre a temperatura da água. Após 1 hora de exposição foi observada diminuição significativa na atividade de ERK 1 e ERK 2 dos animais expostos à radiação. Este efeito inibitório se manteve nos experimentos de 3h e 3 dias. Ao décimo dia, a atividade de ERK 1 e ERK 2 do grupo tratado e controle foi semelhante. A expressão de PKC-alfa só foi alterada nos animais expostos a 3 dias de radiação. Os resultados nos permitem concluir que a radiação emitida por telefones móveis, neste modelo, afeta vias de sinalização importantes nas células hipofisárias, o que torna necessário estudos mais detalhados sobre as conseqüências das modificações observadas. / In the last few years, the mobile telecommunication system has improved significantly, making one sixth of the world`s population to use mobile phones, which means, in numbers, that more than a billion of people are using such devices nowadays (National Radiological Protection Board, 2004; Maier, 2006). In 2011, the number of habilitations in Brazil has reached more than 202,9 millions, corresponding a density of 104,68 phones for each hundred of habitants (Anatel, 2011). Studies about the effects of radiation transmitted by mobile phones to the organism are still very few, the results are contradictories and most of them are made in cell cultures or ex vivo cells to further exposure to radiation. Thus, the objectives of this study were to establish an animal model in order to investigate the effect of the electromagnetic radiation emitted by mobile phones into the physiology of rats and to evaluate the role of this type of radiation in the expression and activity of ERK 1 and ERK 2 and the expression of isoform alpha from PKC in pituitary gland. 60 days-old Wistar rats were used. The source of radiation was a mobile phone with a frequency of 1800 MHz. Four experimental groups were established: 1- animals exposed for 1 hour; 2- animals exposed for 3h; 3- animals exposed for 3 days; 4- animals exposed for 10 days. In the experiments of 3 and 10 days, the exposure was 25 seconds in every 2 minutes. Each experimental group was followed by a control group. The capacity of the radiation to cross the animal’s cranial bones, and to heat the water under the cranial region, was measured. The effect of the radiation emitted by the mobile phone on ERK 1 and ERK 2 expression and activity, and expression of isoform alpha of PKC in pituitary gland were evaluated. It was shown that the radiation is capable of crossing the cranial region. It was not observed any effect of the radiation into the water temperature. After 1 hour of exposure it were observed a significant reduction in ERK 1 and ERK 2 activity of the animals exposed to radiation. This inhibitory effect was kept in the experiments of 3 hours and 3 days as well. At the tenth day, the activity of ERK 1 and ERK 2 of control and exposed group was similar. The expression of PKC-alpha has only changed in the animals exposed to 3 days of radiation. According to these results, we conclude that radiation emitted by mobile phones, in this experimental model, affects important signaling pathways in the pituitary cells, but further studies with more details are needed to determine the consequences of the modifications observed.

Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-04-27T15:54:57Z No. of bitstreams: 1 luizcarlosdecairesjunior.pdf: 1316351 bytes, checksum: e029591c37abc938d7247930a9c7cd15 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-05-12T15:50:45Z (GMT) No. of bitstreams: 1 luizcarlosdecairesjunior.pdf: 1316351 bytes, checksum: e029591c37abc938d7247930a9c7cd15 (MD5) / Made available in DSpace on 2017-05-12T15:50:46Z (GMT). No. of bitstreams: 1 luizcarlosdecairesjunior.pdf: 1316351 bytes, checksum: e029591c37abc938d7247930a9c7cd15 (MD5) Previous issue date: 2014-08-22 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / O sistema de telecomunicação móvel tem crescido ao longo dos anos. A comunidade científica tem demonstrado uma crescente preocupação sobre os possíveis efeitos da exposição à radiação electromagnética de radiofrequência (RFEMR) emitida por dispositivos móveis sobre a saúde dos usuários. Este estudo teve como objetivo avaliar os efeitos da RF-EMR sobre a via de MAPKs, verificando os níveis de fosforilação das enzimas MEK 1 / 2 e ERK 1 / 2, em células do hipotálamo e hipófise, sobre a secreção de catecolaminas, nível de glicose sérica, consolidação da memória de longo prazo e estabelecimento de comportamento de ansiedade. Ratos Wistar machos, com 60 dias de idade, foram expostos à radiação emitida pelos telefones celulares (1,8 GHz) em condições agudas (1 e 3 horas de exposição) e crônicas (3 e 10 noites de exposição). Os níveis de fosforilação de MEK 1 / 2 e ERK 1 / 2 foram alterados em células hipotalâmicas de animais expostos por 1 hora. Após 3 horas, 3 noites e 10 noites, foi observada alteração somente no nível de fosforilação das enzimas MEK 1 / 2, em células hipotalâmicas; e nenhuma alteração foi constatada na fosforilação das enzimas MEK 1 / 2 e ERK 1 / 2, em células hipofisárias. As exposições por períodos agudos promoveram aumento da secreção basal de catecolaminas e a glicemia foi alterada após 1 hora e 10 noites. Não foi constatado comportamento estado de ansiedade pelo teste de cruz elevada em quaisquer períodos de exposição. Porém, a exposição crônica, por 10 noites, aumentou a secreção de catecolamina, estimulada por cafeína, concomitantemente à diminuição a glicemia, podendo afetar a consolidação da memória. Os resultados sugerem que a exposição de ratos a campos electromagnéticos emitidos por celulares é capaz de alterar a via de MAPKs, mudar o perfil de secreção basal e estimulada de catecolaminas, de glicemia, além de afetar a consolidação de memória de longo prazo. / The mobile telecommunication system has grown over the years. There has been a growing concern about the possible effects of exposure to radiofrequency electromagnetic radiation (RF-EMR) emitted by mobile devices on the health of users. This study aimed to evaluate the effects of whole-body RF-EMR exposure on MAPK's pathway, verifying the phosphorylation levels of MEK 1 / 2 and ERK 1 / 2, in hypothalamus and pituitary cells, catecholamine secretion, serum glucose, long-term memory consolidation and anxiety-like behavior occurrence. Male Wistar rats, 60 days old, were subjected to electromagnetic waves emitted by mobile phones (1.8 GHz) in acute (1 and 3 hours of exposure) and chronic (3 and 10 nights of exposure) conditions. The phosphorylation levels of MEK 1 / 2 and ERK 1 / 2 changed in hypothalamus cells after 1 hour of exposure. After 3 hours, 3 nights and 10 nights, we have found changes only in phosphorylation of MEK 1 / 2 (hypothalamus); no changes were found in MEK 1 / 2 and ERK 1 / 2 from pituitary cells. The acute exposures lead to the increase of basal catecholamine secretion and the glycemia changed after 1 hour and 10 nights. On the other hand, the chronic exposure increased the catecholamine release, by caffeine stimulation, but decreased the serum glucose level, disturbing the memory consolidation. The results suggest that exposure of rats to electromagnetic fields emitted by mobile phones is able to change the MAPK's pathway, profile of basal and stimulated secretion of catecholamines, and serum glucose level besides affecting long-term memory.

Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-07-07T12:01:34Z No. of bitstreams: 1 camilamansomusso.pdf: 1354117 bytes, checksum: 80a41e3ea9a118d4e53ddb41bbbd54e6 (MD5) / Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu.br), reason: on 2017-07-07T12:39:38Z (GMT) / Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-08-11T13:30:26Z No. of bitstreams: 1 camilamansomusso.pdf: 1354117 bytes, checksum: 80a41e3ea9a118d4e53ddb41bbbd54e6 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-08-14T17:08:26Z (GMT) No. of bitstreams: 1 camilamansomusso.pdf: 1354117 bytes, checksum: 80a41e3ea9a118d4e53ddb41bbbd54e6 (MD5) / Made available in DSpace on 2017-08-14T17:08:26Z (GMT). No. of bitstreams: 1 camilamansomusso.pdf: 1354117 bytes, checksum: 80a41e3ea9a118d4e53ddb41bbbd54e6 (MD5) Previous issue date: 2014-02-24 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / É crescente o número de usuários de telefonia móvel. Em 2013, o número total de telefones móveis habilitados no mundo atingiu 6,8 bilhões. Uma queda nas taxas de fertilidade tem sido notada em todo o mundo; embora existam muitas razões para o declínio dessas taxas, um dos principais motivos é a infertilidade masculina. Existe uma preocupação crescente no meio científico com os efeitos da exposição à radiação eletromagnética de radiofrequência (RF-EMR) emitida por telefones celulares em relação à fertilidade em homens. Este estudo teve como objetivo avaliar a qualidade dos espermatozoides de ratos Wistar, após exposição do animal à RF-EMR. Ratos Wistar machos (Rattus notvegicus , com 90 dias de idade e 280 ± 20 g de massa corporal, foram expostos à radiofrequência emitida por telefones celulares (1,8 GHz) por períodos de 3 e 10 noites. As amostras de secreção epididimária foram extraídas da cauda do epidídimo dos animais. Foi realizado o ensaio TUNEL para a marcação dos espermatozoides com DNA fragmentado e estes foram quantificados por citometria de fluxo e a concentração de espermatozoides, morfologia e mortalidade foram também avaliadas. As amostras dos animais de ambos os grupos expostos, 3 e 10 noites, apresentaram um aumento da mortalidade e uma diminuição da concentração de espermatozoides, além de um aumento da incidência de fragmentação do DNA, o que é um indicativo de apoptose. Não houve diferença significativa entre os grupos na porcentagem de espermatozoides morfologicamente normais e anormais. Diante dos resultados do presente estudo, especulamos que a RF-EMR emitida por telefones móveis afeta negativamente a qualidade do sêmen e pode prejudicar a fertilidade masculina. / The mobile communication system has grown over the years. The total number of mobile phone subscriptions reached 6.8 billion in 2013. Decreasing fecundity and fertility in men have led to growing concern about the hazardous effects of exposure to radiofrequency electromagnetic radiation (RF-EMR) on reproductive organs. This study aimed to analyze the sperm quality of rats after whole-body RF-EMR exposure. Male Wistar rats, 90 days old, were exposed to radiofrequency emitted by mobile phones (1.8 GHz) for periods of 3 and 10 nights. Apoptosis was tested using TUNEL assay, sperm morphology and mortality were assessed by Shorr and Eosin stain methods respectively, and the cell count was performed. Both exposed groups showed significantly increased mortality and reduced sperm concentration along with significant increase in the apoptosis incidence compared to the respective control groups. Given the results, we speculate that RF-EMR exposure negatively affects semen quality and may impair male fertility.