ANTECEDENTES DA INTENÇÃO DE RECOMPRA EM APLICATIVO DE HOSPEDAGEM

O avanço tecnológico tem possibilitado o desenvolvimento de novos formatos de negócios no contexto virtual, sendo os casos dos aplicativos de reserva de locais e de experiências. No entanto, ainda são criadas barreiras no consumo em tais aplicativos, por conta da confiança dos participantes. Nesse sentido, o artigo tem como objetivo identificar a influência da utilidade percebida, da facilidade de uso e da confiança na empresa e em terceiros na intenção de recompra em aplicativos de hospedagem. Para isso, foi realizada uma survey com 176 usuários de um aplicativo de hospedagem (Airbnb) e a análise realizada por meio da modelagem de equações estruturais (MEE). Os resultados apresentaram que a utilidade percebida e facilidade de uso influenciam positivamente na intenção de recompra, porém a confiança na empresa e em terceiro não foi positiva. Além disso, a utilidade percebida influenciou positivamente a confiança na empresa e em terceiros, o que não ocorreu com a facilidade de uso. A pesquisa contribuiu para uma reflexão a respeito da nova economia ou da economia compartilhada, possibilitando reflexões para as empresas no que tange a importância da percepção de utilidade de seus aplicativos.Palavras-chave: Percepção de utilidade. Facilidade de uso. Confiança. Intenção de recompra. Aplicativos móveis.ABSTRACTThe technological advance has made possible the development of new business formats in the virtual context, being the cases of applications of places reservation and experiences. However, consumption barriers are still created in such applications, because of the confidence of the participants. In this sense, the article aims to identify the influence of perceived utility, ease of use and trust in the company and third parties in the intention of repurchase in hosting applications. For this, a survey was carried out with 176 users of a hosting application (Airbnb) and the analysis performed through structural equation modeling (SEM). The results showed that the perceived utility and ease of use positively influence the repurchase intention, but confidence in the company and in the third one was not positive. In addition, perceived utility positively influenced trust in the company and in others, which did not occur with ease of use. The research contributed to a reflection about the new economy or the shared economy, allowing reflections for companies on the importance of the perception of utility of their applications.Keywords: Perceived usefulness. Perceived ease of use. Trust. Repurchase intention. Mobile apps

Confiabilidade teste-reteste da baropodometria em indivíduos jovens assintomáticos durante análise semi estática e dinâmica

Introduction: Postural control is a multidimensional construct modulated by the integration of sensory information and muscular activity. One of the challenges in clinical practice and scientific research is the postural data collection of objective control data. Thus, baropodometry can be a promising instrument for analysis. Objective: To evaluate the absolute and relative reliability of baropodometry by means of test-retest in young asymptomatic subjects during semi-static and dynamic analysis. Methods: This is a methodological study, approved by the Research Ethics Committee of UFJF (1,803,411). Sample selection was performed by convenience. Healthy individuals aged 18 to 35 years were included in the study without gender restriction. Participants with pain or any clinical signs of overload which led to unfeasible collection were excluded from the analysis. The variables analyzed were contact surface, maximum and mean pressure, index bow, pressure center and pressure areas in the forefoot, midfoot and hindfoot. Results: 33 individuals (total of 66 feet) participated in this study. The mean body mass of the participants was 63.0 ± 9.9kg, height of 163.4 ± 30.1cm, BMI of 23.7 ± 2.8 kg/m2. It was observed that five out of the eight variables evaluated in the semi-static analysis presented high reliability (≥ 0.70). On the other hand, the reproducibility of the measures in the dynamic analysis was low to moderate (≤ 0.69). Conclusion: Baropodometry findings should be interpreted with caution in clinical practice and in scientific research. It is suggested that complementary assessments be made for decision-making assistance.Introdução: O controle postural é um constructo multidimensional modulado pela integração de informações sensoriais e atividade muscular. Um dos desafios na prática clínica e em pesquisas científicas é a obtenção de dados objetivos do controle postural. Baseando-se nessa premissa, a baropodometria pode ser um instrumento promissor para esta análise. Objetivo: Avaliar a confiabilidade absoluta e relativa por meio de teste-reteste da baropodometria em indivíduos jovens assintomáticos durante análise semi estática e dinâmica. Métodos: Trata-se de um estudo metodológico, aprovado pelo Comitê de Ética em pesquisa da UFJF (parecer 1.803.411). A seleção da amostra foi por conveniência. Foram incluídos indivíduos hígidos de 18 a 35 anos sem restrição de gênero e excluídos participantes com queixa álgica ou qualquer sinal clínico de sobrecarga que inviabilizasse a coleta. As variáveis analisadas foram superfície de contato, pressão máxima e média, arco index, centro de pressão e as áreas de pressão no antepé, mediopé e retropé. Resultados: Participaram do estudo 33 indivíduos (66 pés). A média de massa corporal dos participantes foi de 63,0 ± 9,9 kg, estatura de 163,4 ± 30,1 cm, IMC de 23,7 ± 2,8 kg/m2 e número do calçado 38,0 ± 2,1. Observamos que das oito variáveis avaliadas na análise semi estática, cinco apresentaram confiabilidade alta (CCI ≥ 0.70). Por outro lado, a reprodutibilidade das medidas na análise dinâmica foi de baixa à moderada (CCI ≤ 0.69). Conclusão: Os achados da baropodometria devem ser interpretados com cautela na prática clínica e em pesquisa científica. Sugere-se que sejam realizadas avaliações complementares para o auxílio de tomada de decisões

Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the flux can be described by a power law $E^{-\gamma}$ with index $\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19}$ eV.Comment: Replaced with published version. Added journal reference and DO

Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30 to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy -- corrected for geometrical effects -- is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal.Comment: Replaced with published version. Added journal reference and DO

Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy

We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8 \pm 0.7 (stat) \pm 6.7 (sys) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principle calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the direct calibration of any cosmic-ray radio detector against the well-established energy scale of the Pierre Auger Observatory.Comment: Replaced with published version. Added journal reference and DOI. Supplemental material in the ancillary file

A inclusão escolar para pacientes com deficiência intelectual ou atraso cognitivo: School inclusion for patients with intellectual disability or cognitive delay

A educação inclusiva é fundamental para que crianças e adolescentes vivenciem ideias e experiências de ensino aprendizagem significativa, desenvolvam a autonomia e conquistem direitos de cidadania. No entanto, existem obstáculos que precisam ser compreendidos e superados e estratégias que podem ser adotadas para promover a inclusão de crianças com deficiência intelectual ou atraso cognitivo. Diante disso, este estudo tem como objetivo compreender o processo de inclusão escolar de alunos com deficiência intelectual ou atraso cognitivo. Para isso, trata-se de uma revisão sistemática de literatura, desenvolvida a partir da seleção de estudos nas bases de dados Scielo, Pubmed e BVS/Medline a partir do uso de descritores DeCS/MeSH e aplicação de critérios de inclusão e exclusão. Após a análise e interpretação dos dados, concluiu-se que, no processo de inclusão de alunos com deficiência intelectual ou atraso cognitivo no ambiente escolar, a educação inclusiva interfere positivamente na qualidade de vida desses. Para isso, destacam-se uma série de estratégias relevantes, tais como: envolvimento de escola como um todo, dos professores e da família; compreender a deficiência; valorizar os interesses e habilidades dos alunos com deficiência; estimular a autodeterminação desses e a convivência entre pessoas deficientes e não deficientes; promover a socialização por meio de jogos; utilizar atividades adaptadas; e cuidar da formação inicial e continuada dos professores, contemplando ideias sobre educação inclusiva

The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V

The eighteenth data release of the Sloan Digital Sky Surveys (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs, or "Mappers": Milky Way Mapper (MWM), Black Hole Mapper (BHM), and Local Volume Mapper (LVM). This data release contains extensive targeting information for the two multi-object spectroscopy programs (MWM and BHM), including input catalogs and selection functions for their numerous scientific objectives. We describe the production of the targeting databases and their calibration- and scientifically-focused components. DR18 also includes ~25,000 new SDSS spectra and supplemental information for X-ray sources identified by eROSITA in its eFEDS field. We present updates to some of the SDSS software pipelines and preview changes anticipated for DR19. We also describe three value-added catalogs (VACs) based on SDSS-IV data that have been published since DR17, and one VAC based on the SDSS-V data in the eFEDS field.Comment: Accepted to ApJ

The eighteenth data release of the Sloan Digital Sky Surveys : targeting and first spectra from SDSS-V

The eighteenth data release of the Sloan Digital Sky Surveys (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs, or "Mappers": Milky Way Mapper (MWM), Black Hole Mapper (BHM), and Local Volume Mapper (LVM). This data release contains extensive targeting information for the two multi-object spectroscopy programs (MWM and BHM), including input catalogs and selection functions for their numerous scientific objectives. We describe the production of the targeting databases and their calibration- and scientifically-focused components. DR18 also includes ~25,000 new SDSS spectra and supplemental information for X-ray sources identified by eROSITA in its eFEDS field. We present updates to some of the SDSS software pipelines and preview changes anticipated for DR19. We also describe three value-added catalogs (VACs) based on SDSS-IV data that have been published since DR17, and one VAC based on the SDSS-V data in the eFEDS field.Publisher PDFPeer reviewe