An Enhanced Hyper-Parameter Optimization of a Convolutional Neural Network Model for Leukemia Cancer Diagnosis in a Smart Healthcare System.

Healthcare systems in recent times have witnessed timely diagnoses with a high level of accuracy. Internet of Medical Things (IoMT)-enabled deep learning (DL) models have been used to support medical diagnostics in real time, thus resolving the issue of late-stage diagnosis of various diseases and increasing performance accuracy. The current approach for the diagnosis of leukemia uses traditional procedures, and in most cases, fails in the initial period. Hence, several patients suffering from cancer have died prematurely due to the late discovery of cancerous cells in blood tissue. Therefore, this study proposes an IoMT-enabled convolutional neural network (CNN) model to detect malignant and benign cancer cells in the patient's blood tissue. In particular, the hyper-parameter optimization through radial basis function and dynamic coordinate search (HORD) optimization algorithm was used to search for optimal values of CNN hyper-parameters. Utilizing the HORD algorithm significantly increased the effectiveness of finding the best solution for the CNN model by searching multidimensional hyper-parameters. This implies that the HORD method successfully found the values of hyper-parameters for precise leukemia features. Additionally, the HORD method increased the performance of the model by optimizing and searching for the best set of hyper-parameters for the CNN model. Leukemia datasets were used to evaluate the performance of the proposed model using standard performance indicators. The proposed model revealed significant classification accuracy compared to other state-of-the-art models.

On SFBC Schemes for Enabling Virtual Array Concept in Monostatic ISAC Scenarios.

The integrated sensing and communication (ISAC) paradigm is being proposed for 6G as a new feature of the physical layer (PHY), for tackling dual-functional applications, i.e., demanding radio-sensing and communication functions, such as the Internet of Things (IoT) and autonomous driving systems. This work considers the integration of sensing and communications functionalities in a unique platform. To achieve this goal, the use of orthogonal space frequency block codes (SFBC) is proposed. SFBC code orthogonality enables both the separation of communications data streams at a user terminal and the estimation of target parameters. The SFBC enhances the communications link diversity without requiring channel state information knowledge at the transmitter and enable the virtual antenna array concept for enhancing the direction-finding resolution. The use of different SFBCs provides a tradeoff between achieved diversity and sensing resolution. For example, an Alamouti code, applicable for the case with two transmitting antennas, duplicates sensing resolution and achieves a diversity order of two while the use of a Tarokh code, applicable for a scenario with four transmitting antennas, provides a fourfold better resolution and diversity order of four. However, the code rate achieved with the Tarokh code is half of the one achieved with the Alamouti code. Furthermore, the unambiguous range is reduced since the bandwidth is divided to multiplex the different antenna signals. For its simplicity, good performance and reduced integration requirements, the method is promising for future ISAC systems.

Secure Cognitive Radio-Enabled Vehicular Communications under Spectrum-Sharing Constraints.

Vehicular communication has been envisioned to support a myriad of essential fifth-generation and beyond use-cases. However, the increasing proliferation of smart and intelligent vehicles has generated a lot of design and infrastructure challenges. Of particular interest are the problems of spectrum scarcity and communication security. Consequently, we considered a cognitive radio-enabled vehicular network framework for accessing additional radio spectrum and exploit physical layer security for secure communications. In particular, we investigated the secrecy performance of a cognitive radio vehicular network, where all the nodes in the network are moving vehicles and the channels between them are modeled as double-Rayleigh fading. Furthermore, adopting an underlay approach, the communication between secondary nodes can be performed by employing two interference constraint strategies at the primary receiver; (1) Strategy I: the secondary transmitter power is constrained by the interference threshold of the primary receiver, and (2) Strategy II: the secondary transmitter power is constrained by both the interference threshold of the primary receiver and the maximum transmit power of the secondary network. Under the considered strategies, we derive the exact secrecy outage probability (SOP) and ergodic secrecy capacity (ESC) expressions over double-Rayleigh fading. Moreover, by analyzing the asymptotic SOP behavior, we show that a full secrecy diversity of 1 can be achieved, when the average channel gain of the main link goes to infinity with a fixed average wiretap channel gain. From the ESC analysis, it is revealed that the ESC follows a scaling law of ΘlnΩm2Ωe2 for large Ωm and Ωe, where Ωm and Ωe are the average channel gains of the main link and wiretap link. The numerical and simulation results verify our analytical findings.

Hybrid Satellite-Terrestrial Relay Network: Proposed Model and Application of Power Splitting Multiple Access.

The development of hybrid satellite-terrestrial relay networks (HSTRNs) is one of the driving forces for revolutionizing satellite communications in the modern era. Although there are many unique features of conventional satellite networks, their evolution pace is much slower than the terrestrial wireless networks. As a result, it is becoming more important to use HSTRNs for the seamless integration of terrestrial cellular and satellite communications. With this intent, this paper provides a comprehensive performance evaluation of HSTRNs employing non-orthogonal multiple access technique. The terrestrial relay is considered to be wireless-powered and harvests energy from the radio signal of the satellite. For the sake of comparison, both amplify-and-forward (AF) and decode-and-forward (DF) relaying protocols are considered. Subsequently, the closed-form expressions of outage probabilities and ergodic capacities are derived for each relaying protocol. Extensive simulations are performed to verify the accuracy of the obtained closed-form expressions. The results provided in this work characterize the outage and capacity performance of such a HSTRN.

Efficient Power Control Framework for Small-Cell Heterogeneous Networks.

Heterogeneous networks are rapidly emerging as one of the key enablers of beyond fifth-generation (5G) wireless networks. It is gradually becoming clear to the network operators that existing cellular networks may not be able to support the traffic demands of the future. Thus, there is an upsurge in the interest of efficiently deploying small-cell networks for accommodating a growing number of user equipment (UEs). This work further extends the state-of-the-art by proposing an optimization framework for reducing the power consumption of small-cell base stations (BSs). Specifically, a novel algorithm has been proposed which dynamically switches off the redundant small-cell BSs based on the traffic demands of the network. Due to the dynamicity of the formulated problem, a new UE admission control policy has been presented when the problem becomes infeasible to solve. To validate the effectiveness of the proposed solution, the simulation results are compared with conventional techniques. It is shown that the proposed power control solution outperforms the conventional approaches both in terms of accommodating more UEs and reducing power consumption.

Iterative Analog-Digital Multi-User Equalizer for Wideband Millimeter Wave Massive MIMO Systems.

Most of the previous work on hybrid transmit and receive beamforming focused on narrowband channels. Because the millimeter wave channels are expected to be wideband, it is crucial to propose efficient solutions for frequency-selective channels. In this regard, this paper proposes an iterative analog-digital multi-user equalizer scheme for the uplink of wideband millimeter-wave massive multiple-input-multiple-output (MIMO) systems. By iterative equalizer we mean that both analog and digital parts are updated using as input the estimates obtained at the previous iteration. The proposed iterative analog-digital multi-user equalizer is designed by minimizing the sum of the mean square error of the data estimates over the subcarriers. We assume that the analog part is fixed for all subcarriers while the digital part is computed on a per subcarrier basis. Due to the complexity of the resulting optimization problem, a sequential approach is proposed to compute the analog phase shifters values for each radio frequency (RF) chain. We also derive an accurate, semi-analytical approach for obtaining the bit error rate (BER) of the proposed hybrid system. The proposed solution is compared with other hybrid equalizer schemes, recently designed for wideband millimeter-wave (mmWave) massive MIMO systems. The simulation results show that the performance of the developed analog-digital multi-user equalizer is close to full-digital counterpart and outperforms the previous hybrid approach.

The screening of rare blood donors in a highly admixed population: A new approach for Holley and Diego genotyping and impact of genomic and self-reported ancestry.

OBJECTIVES: The present study aimed to develop strategies for genotyping DO*HY (Dombrock system) and DI*A/DI*B (Diego system) alleles and to evaluate the impact of genomic and self-declared ancestry on rare donor screening in admixed populations. BACKGROUND: The antigens Hy and Dib demonstrate clinical importance. The lack of antisera for the serological evaluation of these antigens makes it necessary to develop molecular methods. In addition, considering that some rare red blood cell phenotypes present differences in frequency between ethnic groups, it is important to assess the applicability of self-declared ancestry in the search for rare donors in admixed populations. METHODS: DO*HY and DI*A/DI*B genotyping based on real-time polymerase chain reaction (PCR) was standardised. A total of 457 blood donors clustered by self-defined skin colour/race categories were genotyped. Furthermore, individual genomic ancestry was used in the analyses. RESULTS: The assays developed are reproducible and provide satisfactory results even at low concentrations of DNA, which make them useful in situations where the DNA is scarce, such as dried blood spots on filter paper, or when screening for pooled samples. No significant difference was observed in the frequencies of the DI*A, DI*B and DO*HY, comparing the self-declared White (branco) donors with those who are Black (preto) and Brown (pardo). CONCLUSION: Real-time PCR, especially using pooled samples, is a promising strategy to screen rare blood donors. Although both self-reported race/colour and some blood group phenotypes are associated with ancestry, the results point to a greater complexity in the application of self-declared race/colour in the screening of rare donors in admixed populations.

Erratum: Do, D.-T., et al. Hybrid Satellite-Terrestrial Relay Network: Proposed Model and Application of Power Splitting Multiple Access. Sensors 2020, 20, 4296.

The authors wish to make the following erratum to this paper [...].

Mundo da doença mental: percepções e perspectivas no processo saúde-doença / World of mental disease: perceptions and perspective of the health disease process

Objetivo: desvelar a percepção do ser humano na descoberta do mundo dadoença mental e as perspectivas no processo saúde-doença. Método: estudo fenomenológico,desenvolvido com 10 adultos em tratamento em uma unidade de internação psiquiátrica, nohospital público de um município do sul do Brasil. A produção de dados ocorreu por meio daentrevista fenomenológica, no período de janeiro a março de 2014. Utilizou-se afenomenologia-hermenêutica de Paul Ricoeur e para a compreensão dos discursos, oreferencial teórico-filosófico de Maurice Merleau-Ponty. Resultados: o diagnóstico dadoença mental permeia a vivência pela generalidade e hábito, os quais, expõem osparadigmas. Contudo, quando se mostra como corpo próprio, emerge a singularidadeenquanto ser no mundo para as percepções do processo saúde-doença. Conclusão: para tanto,faz-se necessário desvelar as reais necessidades do ser humano, a fim de tecer redes designificações diante do processo saúde-doença e perspectivas terapêutica.

Aim: to unveil the perception of the human being in the discovery of the worldof mental illness and the prospects in the health disease process. Method: phenomenologicalstudy developed with 10 adults undergoing treatment in a psychiatric inpatient unit of apublic hospital in a municipality in the south of Brazil. The production of data occurredthrough the phenomenological interview from January to March, 2014. Paul-Ricoeur'sphenomenology-hermeneutics and Maurice Merleau-Ponty's theoretical-philosophicalreference were used to understand the discourses. Results: the diagnosis of mental illnesspermeates the experience by generality and habit, which expose the historical paradigms.However, when it is shown as a body itself, the singularity emerges as a being in the world forthe perceptions of the disease health process. Conclusion: to do so, it is necessary to unveilthe real needs of the human being, in order to weave networks of meanings before the healthdisease and therapeutic perspectives processes.

Objetivo: revelar la percepción del ser humano en el descubrimiento del mundode la enfermedad mental y las perspectivas en el proceso salud enfermedad. Método: estudiode perspectiva fenomenológica, desarrollado con 10 adultos en tratamiento en una unidad deinternación psiquiátrica, de un hospital público de una ciudad del sur de Brasil. Larecolección de datos ocurrió por medio de entrevista fenomenológica, desarrollada en entreenero y marzo de 2014. Para el análisis se utilizó la fenomenología hermenéutica, de PaulRicoeur, y para la comprensión de los discursos el referencial teórico filosófico de MauriceMerleau-Ponty. Resultados: el diagnóstico de la enfermedad mental está relacionada con lavivencia por la generalización y el hábito, los cuales evidencian los paradigmas. Sinembargo, cuando se expone como cuerpo propio emerge la singularidad del ser en el mundopara las percepciones del proceso salud enfermedad. Conclusión: para tanto es necesariorevelar las reales necesidades del ser humano, con el objetivo de tejer redes designificaciones sobre el proceso salud enfermedad y perspectivas terapéuticas.

Duffy blood group system: New genotyping method and distribution in a Brazilian extra-Amazonian population.

Duffy blood group system is of interest in several fields of science including transfusion medicine, immunology and malariology. Although some methods have been developed for Duffy polymorphism genotyping, not all of them have been sufficiently described and validated, and all present limitations. At the same time, the frequency of Duffy alleles and antigens in some densely populated regions of the world are still missing. In this study we present new tests for genotyping the major alleles of the Duffy blood system and describe Duffy alleles and antigens in blood donors and transfusion-dependent patients in Minas Gerais, Brazil. A simple and reproducible strategy was devised for Duffy genotyping based on real-time PCR that included SNPs rs12075 and rs2814778. No significant differences between the allele frequencies were observed comparing blood donors and patients. Among the blood donors, the phenotype Fy(a-b+) was the most common and the Fy(a-b-) phenotype, associated with populations of African descent, was remarkably less common among subjects who self-identified as black in comparison to other ethnoracial categories. However, the African ancestry estimated by molecular markers was significantly higher in individuals with the allele associated to the Duffy null phenotype. The genotyping method presented may be useful to study Duffy genotypes accurately in different contexts and populations. The results suggest a reduced risk of alloimmunization for Duffy antigens and increased susceptibility for malaria in Minas Gerais, considering the high frequency of Duffy-positive individuals.

Percepções do ser humano internado em unidade psiquiátrica sobre o viver com doença mental / Percepciones del ser humano internado en la unidad psiquiatrica sobre el vivir con enfermedad mental / Perceptions of individuals hospitalized in psychiatric units about living with a mental disorder

RESUMO Objetivo: desvelar a percepção do ser humano internado em unidade psiquiátrica sobre o viver com doença mental. Método: trata-se de estudo de abordagem fenomenológica, cujos dados foram obtidos por meio de entrevistas com dez adultos internados em uma unidade psiquiátrica de um hospital de ensino do sul do Brasil, no período de janeiro a março de 2014. Utilizaram-se os passos da fenomenologia-hermenêutica de Paul Ricoeur e, para compreensão e interpretação das informações, o referencial teórico-filosófico de Maurice Merleau-Ponty. Resultados: revelaram três temas: o mundo do ser humano que vivencia a doença mental; percepção da doença mental para o ser humano que vivencia a internação psiquiátrica; e o ser na relação de ambiguidade: o movimento de liberdade. Conclusão: a equipe de saúde, em especial o enfermeiro, necessita incorporar a visão crítica reflexiva da prática assistencial, as bases científicas e a legislação vigente na área da saúde, em especial a saúde mental, as quais visam à autonomia de escolha centrada no ser humano que vivencia a doença mental. Também promover uma rede quente de cuidado singularizado que preze pelo acolhimento e instigue o autocuidado do ser humano por meio da educação em saúde na perspectiva de ações de integralidade. Logo, é fundamental a promoção de saúde, autonomia e liberdade pela escuta do ser humano que vivencia o fenômeno da doença mental, em seus desejos de vida e perspectivas clínicas.

RESUMEN Objetivo: revelar la percepción del ser humano internado en una unidad psiquiátrica sobre el vivir con enfermedad mental. Métodos: estudio con abordaje fenomenológico, cuyos datos fueron obtenidos por medio de entrevistas con diez adultos internados en una unidad psiquiátricos de un hospital de enseñanza del Sur de Brasil, en el periodo de enero a marzo de 2014. Se utilizaron los pasos de la fenomenología-hermenéutica de Paul Ricoeur y, para la comprensión e interpretación de las informaciones, el referencial teórico-filosófico de Merleau-Ponty. Resultados: se revelaron tres temas: el mundo del ser humano que vive la enfermedad mental; percepción de la enfermedad mental para el ser humano que vive la internación psiquiátrica; y el ser en la relación de ambigüedad: el movimiento de libertad. Conclusión: el equipo de salud, en especial el enfermero, necesita incorporar la visión critico-reflexiva de la práctica asistencial, las bases científicas y la legislación vigente en el área de la salud, en especial la salud mental, las cuales visan la autonomía de elección centrada en el ser humano que vive la enfermedad mental. También promover una red de cuidado singularizado que preconice la recepción e instigue el autocuidado del ser humano por medio de la educación en salud en la perspectiva de acciones de integralidad. Consecuentemente, es fundamental la promoción de la salud, autonomía y libertad por la escucha del ser humano que vive el fenómeno de la enfermedad mental, en sus deseos de vida y perspectivas clínicas.

ABSTRACT Objective: to reveal the perception of individuals hospitalized in psychiatric units about living with a mental disorder. Method: study with phenomenological approach with data obtained through interviews with ten adult individuals hospitalized in a psychiatric unit of a teaching hospital in the southern region of Brazil between January and March 2014. The steps of Paul Ricoeur's hermeneutic phenomenology were used, and Maurice Merleau-Ponty's theoretical-philosophical reference was used for data understanding and interpretation. Results: three themes were revealed: the world of individuals that experience a mental disorder; perception on the mental disorder for the individual that experiences psychiatric hospitalization; and the being in the ambiguity relation: the movement of freedom. Conclusion: the health care team, particularly nurses, need to incorporate the critical reflective view of the care practice, the scientific bases, and the legislation in force in the area of health, especially mental health, to enable autonomy of choice focused on the human being experiencing a mental disorder, as well as promote a warm network of individualized care that values the reception and incites the self-care through the education in health in the perspective of comprehensive actions. Therefore it is critical to promote health, autonomy, and freedom by listening to the individuals that experiences the phenomenon of a mental disorder in relation to their life desires and clinical perspectives.

As práticas educativas e o autocuidado: evidências na produção científica da enfermagem / Educational practices and self-care: evidence in scientific production of nursing / Prácticas educativas y auto-cuidado: evidencias en la producción científica de enfermería

Buscar e analisar as evidências disponíveis nas produções científicas de enfermagem acerca de práticas educativas em saúde relacionadas ao autocuidado.MÉTODO: trata-se de uma revisão integrativa da literatura. A busca foi realizada no Sistema da Literatura Latino-Americana em Ciências da Saúde (LILACS) e na US National Library of Medicine (PUBMED), resultando na amostra de 13 publicações. Os dados foram analisados de acordo com a análise de conteúdo.RESULTADOS: desses estudos emergiram diferentes estratégias para a promoção do autocuidado, entre elas a utilização de recursos tecnológicos duros, de visitas domiciliares, grupos terapêuticos e de uma folha de orientações.CONCLUSÕES: destaca-se a necessidade de que os profissionais de enfermagem busquem qualificar suas práticas incorporando ações educativas inovadoras e contextualizadas de promoção do autocuidado...

Objective: this study aims to seek and analyze the available evidence in the scientific nursing production about educational health practices related to self-care. Method: it is an integrative literature review. The search was conducted in the Latin-American and Caribbean Literature on Health Sciences System (LILACS) and in the US National Library of Medicine (PUBMED), resulting in a sample of 13 publications. Results: different strategies for promoting self-care emerged from these studies, including the use of hard technological resources, home visits, therapeutic groups, and use of a guidance sheet. Conclusion: there is the need for nursing professionals seek to qualify their practices incorporating innovative and contextualized educational practices to promote self-care

Enfermagem e cuidado de si no mundo do cuidado em psiquiatria / Enfermería y autocuidado en el mundo de lo cuidado en psiquiatria / Nursing and self-care in the world of psychiatric care

Objective: Understanding self-care among nursing professionals in mental health. Method: qualitative study conducted in a psychiatric unit of a teaching hospital in Rio Grande do Sul, Brazil. Merleau-Ponty’s phenomenology of perception was used as a philosophical theoretical framework and Paul Ricoeur’s hermeneutic phenomenology was used as a methodological framework. The research was conducted with10 nursing professionals in mental health, out of a total population of 15 professionals, by means of open interview, within the period from September to December 2010. Results: through the metaphor of discourses, the theme emerged: the world of psychiatry. Conclusion: care in the world of psychiatry is unveiled as a stage of intense interpersonal exchanges, matches and mismatches with the other involved in care. This space of objective and subjective relationships and events interferes with care for the other and each nursing professional’s self-care...

Objetivo: Compreender o cuidado de si dos profissionais de enfermagem em saúde mental. Método: estudo qualitativo realizado em unidade psiquiátrica de um hospital escola no Rio Grande do Sul. Utilizou-se a fenomenologia da percepção de Merleau-Ponty como referencial teórico filosófico e a fenomenologia hermenêutica de Paul Ricoeur como referencial metodológico. A pesquisa foi desenvolvida com 10profissionais de enfermagem em saúde mental, de uma população total de 15 profissionais, por meio de entrevista aberta, no período de setembro a dezembro de 2010. Resultados: da metáfora dos discursos emergiu o tema: o mundo da psiquiatria. Conclusão: o cuidado no mundo da psiquiatria desvela-se como palco de intensas trocas interpessoais, encontros e desencontros com o outro envolvido no cuidado. Esse espaço de relações e acontecimentos objetivos e subjetivos interfere no cuidado do outro e no cuidado de si de cada profissional de enfermagem...

Objetivo: Comprender el autocuidado de los profesionales de enfermería en salud mental. Método: estudio cualitativo realizado en una unidad psiquiátrica de un hospital de enseñanza en Rio Grande do Sul, Brasil. La fenomenología de la percepción de Merleau-Ponty se utilizó como marco teórico filosófico y la fenomenología hermenéutica de Paul Ricoeur se utilizó como marco metodológico. La investigación se realizó con 10 profesionales de enfermería en salud mental, de una población total de 15 profesionales, por medio de entrevista abierta, en el período de septiembre a diciembre de 2010. Resultados: a través de la metáfora de los discursos, el tema surgió: el mundo de la psiquiatría. Conclusión: la atención en el mundo de la psiquiatría se dio a conocer como un escenario de intensos intercambios interpersonales, encuentros y desencuentros con el otro involucrado en la atención. Este espacio de relaciones y acontecimientos objetivos y subjetivos interfiere con la atención al otro y el autocuidado de cada profesional de enfermería...

O significado da utilização de psicofármacos para indivíduos com transtorno mental em acompanhamento ambulatorial / El significado de la psicofarmacología para personas con trastorno mental en el seguimiento ambulatorial / The meaning of psychotropic drug use for individuals with mental disorders in outpatient monitoring

O objetivo deste estudo foi compreender o significado da utilização de psicofármacos para indivíduos com transtorno mental em acompanhamento ambulatorial. Métodos: Estudo com abordagem qualitativa, descritivo, realizado em abril e maio de 2012 por meio de entrevista semiestruturada. Para análise dos dados foi utilizado Software Atlas Ti 6.2, e, para interpretação dos dados, Análise de Conteúdo Temática de Minayo. Resultados: Emergiram duas categorias: o uso de psicofármacos como possibilidade de uma vida normal e a importância da utilização de psicofármacos como promoção de saúde física e mental. Conclusão: A utilização dos psicofármacos para os usuários do ambulatório constitui a sua aceitação diante da sociedade, que os considerada como promotor da reinserção social. A partir dos depoimentos dos indivíduos, revelaram-se significados novos à relação paciente medicação em psiquiatria, no sentido de uma valorização do uso destes medicamentos. .

Objetivo:Comprender el significado del uso de psicofármacos por parte de personas con enfermedad mental.Métodos:Estudio cualitativo, descriptivo, realizado entre abril y mayo de 2012, en una clínica de consulta externa de un hospital universitario. Para el análisis de los datos, se utilizó el software Atlas Ti 6.2 y el Análisis de Contenido Temático de Minayo para la interpretación de los datos.Resultados:Emergieron dos categorías: el uso de drogas psicotrópicas como posibilidad de una vida normal; y la importancia de utilizar esas sustancias para la promoción de la salud física y mental.Conclusión:El uso de psicofármacos para los usuarios del ambulatorio supone la aceptación del mismo delante de la sociedad, considerándolo promotor de la inclusión social. A partir de los testimonios de las personas, se revelaron nuevos significados sobre la relación medicación-paciente psiquiátrico, que propiciaron la apreciación del uso de estos fármacos.

Psychiatric admissions: meanings for the patients of a psychosocial care center / Internação psiquiátrica: significados para usuários de um centro de atenção psicossocial / Internación psiquiátrica: significados para usuarios de un centro de atención psicosocial

OBJECTIVE: To understand the meanings of psychiatric hospitalization for the patients of a Psychosocial Care Center. METHODOLOGY: Qualitative research with phenomenological approach. The scenario was a Psychosocial Care Center in the south of Brazil, from January to March 2010. 10 patients were interviewed with the guiding question: Tell me how it was for you to be admitted to a psychiatric inpatient unit. Were used hermeneutics analysis and Foucault’s thinking. RESULTS:Two themes were revealed: perception of hospitalization in a psychiatric unit: hospital as the place of mental patient, feelings and relations with others; perception of the healthcare team: work routine and conduct of the healthcare team. CONCLUSION:With the phenomenon unveiled, it was possible to realize that psychiatric hospitalization is experienced by ambiguity...

OBJETIVO: compreender os significados da internação psiquiátrica para usuários de um Centro de Atenção Psicossocial. METODOLOGIA: pesquisa qualitativa de abordagem fenomenológica. O cenário foi um Centro de Atenção Psicossocial, no Sul do Brasil, no período de janeiro a março de 2010. Foram entrevistados 10 usuários, sendo a questão orientadora: fale-me como foi para você estar internado em uma unidade de internação psiquiátrica. Utilizaram-se a análise hermenêutica e o pensamento foucaultiano. RESULTADOS: desvelaram-se dois temas - percepção da internação numa unidade psiquiátrica: hospital como lugar do doente mental, sentimentos e relações com o outro, e percepção da equipe de saúde - a rotina de trabalho e a conduta da equipe de saúde. CONCLUSÃO: com o fenômeno desvelado foi possível perceber que a internação psiquiátrica é vivenciada pela ambiguidade...

OBJETIVO:Comprender los significados de la internación psiquiátrica para usuarios de un Centro de Atención Psicosocial. METODOLOGIAInvestigación cualitativa de abordaje fenomenológica. El escenario fue un Centro de Atención Psicosocial, en el sur de Brasil, en el período de enero a marzo/2010. Fueron entrevistados 10 usuarios, siendo la cuestión orientadora: ¿Me diga, cómo fue estar internado en una Unidad de Internación Psiquiátrica?, ¿Se utilizó el análisis hermenéutica y pensamiento Foucaultiana? RESULTADOS:se desvelaron dos temas: percepción de la internación en una unidad psiquiátrica: hospital como lugar del enfermo mental, sentimientos y relaciones con el otro; percepción del equipo de salud: rutina de trabajo y de la conducta del equipo de salud. CONCLUSIÓN: Con el fenómeno desvelado fue posible percibir qué la internación psiquiátrica es vivida por la ambigüedad...

Psychiatric admissions: meanings for the patients of a psychosocial care center / Internação psiquiátrica: significados para usuários de um centro de atenção psicossocial / Internación psiquiátrica: significados para usuarios de un centro de atención psicosocial

OBJECTIVE: To understand the meanings of psychiatric hospitalization for the patients of a Psychosocial Care Center. METHODOLOGY: Qualitative research with phenomenological approach. The scenario was a Psychosocial Care Center in the south of Brazil, from January to March 2010. 10 patients were interviewed with the guiding question: Tell me how it was for you to be admitted to a psychiatric inpatient unit. Were used hermeneutics analysis and Foucault’s thinking. RESULTS:Two themes were revealed: perception of hospitalization in a psychiatric unit: hospital as the place of mental patient, feelings and relations with others; perception of the healthcare team: work routine and conduct of the healthcare team. CONCLUSION:With the phenomenon unveiled, it was possible to realize that psychiatric hospitalization is experienced by ambiguity.(AU)

OBJETIVO: compreender os significados da internação psiquiátrica para usuários de um Centro de Atenção Psicossocial. METODOLOGIA: pesquisa qualitativa de abordagem fenomenológica. O cenário foi um Centro de Atenção Psicossocial, no Sul do Brasil, no período de janeiro a março de 2010. Foram entrevistados 10 usuários, sendo a questão orientadora: fale-me como foi para você estar internado em uma unidade de internação psiquiátrica. Utilizaram-se a análise hermenêutica e o pensamento foucaultiano. RESULTADOS: desvelaram-se dois temas - percepção da internação numa unidade psiquiátrica: hospital como lugar do doente mental, sentimentos e relações com o outro, e percepção da equipe de saúde - a rotina de trabalho e a conduta da equipe de saúde. CONCLUSÃO: com o fenômeno desvelado foi possível perceber que a internação psiquiátrica é vivenciada pela ambiguidade.(AU)

OBJETIVO:Comprender los significados de la internación psiquiátrica para usuarios de un Centro de Atención Psicosocial. METODOLOGIAInvestigación cualitativa de abordaje fenomenológica. El escenario fue un Centro de Atención Psicosocial, en el sur de Brasil, en el período de enero a marzo/2010. Fueron entrevistados 10 usuarios, siendo la cuestión orientadora: ¿Me diga, cómo fue estar internado en una Unidad de Internación Psiquiátrica?, ¿Se utilizó el análisis hermenéutica y pensamiento Foucaultiana? RESULTADOS:se desvelaron dos temas: percepción de la internación en una unidad psiquiátrica: hospital como lugar del enfermo mental, sentimientos y relaciones con el otro; percepción del equipo de salud: rutina de trabajo y de la conducta del equipo de salud. CONCLUSIÓN: Con el fenómeno desvelado fue posible percibir qué la internación psiquiátrica es vivida por la ambigüedad.(AU)

Low-bit rate feedback strategies for iterative IA-precoded MIMO-OFDM-based systems.

Interference alignment (IA) is a promising technique that allows high-capacity gains in interference channels, but which requires the knowledge of the channel state information (CSI) for all the system links. We design low-complexity and low-bit rate feedback strategies where a quantized version of some CSI parameters is fed back from the user terminal (UT) to the base station (BS), which shares it with the other BSs through a limited-capacity backhaul network. This information is then used by BSs to perform the overall IA design. With the proposed strategies, we only need to send part of the CSI information, and this can even be sent only once for a set of data blocks transmitted over time-varying channels. These strategies are applied to iterative MMSE-based IA techniques for the downlink of broadband wireless OFDM systems with limited feedback. A new robust iterative IA technique, where channel quantization errors are taken into account in IA design, is also proposed and evaluated. With our proposed strategies, we need a small number of quantization bits to transmit and share the CSI, when comparing with the techniques used in previous works, while allowing performance close to the one obtained with perfect channel knowledge.

Low-complexity user selection for rate maximization in MIMO broadcast channels with downlink beamforming.

We present in this work a low-complexity algorithm to solve the sum rate maximization problem in multiuser MIMO broadcast channels with downlink beamforming. Our approach decouples the user selection problem from the resource allocation problem and its main goal is to create a set of quasiorthogonal users. The proposed algorithm exploits physical metrics of the wireless channels that can be easily computed in such a way that a null space projection power can be approximated efficiently. Based on the derived metrics we present a mathematical model that describes the dynamics of the user selection process which renders the user selection problem into an integer linear program. Numerical results show that our approach is highly efficient to form groups of quasiorthogonal users when compared to previously proposed algorithms in the literature. Our user selection algorithm achieves a large portion of the optimum user selection sum rate (90%) for a moderate number of active users.

Cuidado de enfermagem ambulatorial a pacientes com alteração da imagem facial / Ambulatory nursing care to patients with facial image change

Objetivo: analisar a percepção da equipe de enfermagem quanto ao cuidado a indivíduos com alteração da imagem facial. Método: estudo descritivo, exploratório, de abordagem qualitativa. Os dados foram construídos em um ambulatório de cabeça e pescoço, por meio de entrevista semiestruturada, entre os meses de setembro a novembro de 2012, com cinco integrantes da equipe de enfermagem. A análise das informações foi respaldada pela Técnica de Análise de Conteúdo. O projeto de pesquisa foi aprovado pelo Comitê de Ética em Pesquisa, Protocolo 0396.0.243.000-11. Resultados: seguida da análise das informações, emergiram duas categorias: 1. Preocupação com a estética e, 2. Sentimentos ambíguos, e seus respectivos temas. Conclusão: evidenciou-se que cuidar de pacientes com imagem facial alterada é difícil em face da gama de sentimentos envolvidos. Acredita-se que este estudo permitirá a ampliação do debate sobre a questão do cuidado ambulatorial a pacientes com alteração da imagem facial.(AU)