ESTIMATIVAS DE ÁREA BASAL E USO DO RELASCÓPIO DE BITTERLICH EM AMOSTRAGEM DE FLORESTA ESTACIONAL DECIDUAL

A Floresta Estacional Decidual da região nordeste de Goiás é um tipo de vegetação florestal do grande bioma Cerrado, que pode ocorrer em áreas de afloramento de calcário e, geralmente, apresenta maior biomassa de espécies arbóreas que a vegetação de cerrado adjacente. Este estudo foi desenvolvido em uma área de floresta intacta (Fazenda Flor Ermo) e em quatro áreas de floresta perturbada (Fazendas Formosa, Traçadal, Manguinha e Conçeição Mocambo). O objetivo foi estimar a área basal e a intensidade amostral utilizando o relascópio de Bitterlich em florestas deciduais. A área basal foi de 29,3 m²/ha na floresta intacta e de 23 a 24 m²/ha nas perturbadas. As florestas com perturbação acentuada apresentaram curvas de distribuição do desvio padrão dos pontos de amostragem com pequena variação comparada com a curvas das áreas com baixo nível de perturbação. Para um limite de confiança de 95 % de probabilidade de confiança para a estimativa da média, 20 unidades amostrais com o relascópio podem ser suficientes para amostrar satisfatoriamente a área basal nesse tipo de vegetação

Identification of transitional disks in Chamaeleon with Herschel

Transitional disks are circumstellar disks with inner holes that in some cases are produced by planets and/or substellar companions in these systems. For this reason, these disks are extremely important for the study of planetary system formation. The Herschel Space Observatory provides an unique opportunity for studying the outer regions of protoplanetary disks. In this work we update previous knowledge on the transitional disks in the Chamaeleon I and II regions with data from the Herschel Gould Belt Survey. We propose a new method for transitional disk classification based on the WISE 12 micron-PACS 70 micron color, together with inspection of the Herschel images. We applied this method to the population of Class II sources in the Chamaeleon region and studied the spectral energy distributions of the transitional disks in the sample. We also built the median spectral energy distribution of Class II objects in these regions for comparison with transitional disks. The proposed method allows a clear separation of the known transitional disks from the Class II sources. We find 6 transitional disks, all previously known, and identify 5 objects previously thought to be transitional as possibly non-transitional. We find higher fluxes at the PACS wavelengths in the sample of transitional disks than those of Class II objects. We show the Herschel 70 micron band to be an efficient tool for transitional disk identification. The sensitivity and spatial resolution of Herschel reveals a significant contamination level among the previously identified transitional disk candidates for the two regions, which calls for a revision of previous samples of transitional disks in other regions. The systematic excess found at the PACS bands could be a result of the mechanism that produces the transitional phase, or an indication of different evolutionary paths for transitional disks and Class II sources.Comment: Accepted for publication in A&A: 11 March 2013 11 pages, 15 figure

Herschel survey of brown dwarf disks in Rho Ophiuchi

Recent observations of the Rho Ophiuchi cluster with the Herschel Space Observatory allow us to probe the spectral energy distribution (SED) of the brown dwarf population in the far-IR, where the disk emission peaks. We performed aperture photometry at 70, 100, and 160 micron, and constructed SEDs for all previously known brown dwarfs detected. These were complemented with ancillary photometry at shorter wavelengths. We compared the observed SEDs to a grid of synthetic disks produced with the radiative transfer code MCFOST, and used the relative figure of merit estimated from the Bayesian inference of each disk parameter to analyse the structural properties. We detected 12 Class II brown dwarfs with Herschel, which corresponds to one-third of all currently known brown dwarf members of Rho Ophiuchi. We do not detect any of the known Class III brown dwarfs. Comparison to models reveals that the disks are best described by an inner radius between 0.01 and 0.07 AU, and a flared disk geometry with a flaring index between 1.05 and 1.2. Furthermore, we can exclude values of the disk scale-height lower than 10 AU (measured at a fiducial radius of 100 AU). We combined the Herschel data with recent ALMA observations of the brown dwarf GY92 204 (ISO-Oph 102), and by comparing its SED to the same grid of disk models, we derived an inner disk radius of 0.035 AU, a scale height of 15 AU with a flaring index of beta~1.15, an exponent for dust settling of -1.5, and a disk mass of 0.001 MSun. This corresponds to a disk-to-central object mass ratio of ~1%. The structural parameters constrained by the extended SED coverage (inner radius and flaring index) show a narrow distribution for the 11 young brown dwarfs detected in Rho Ophiuchi, suggesting that these objects share the same disk evolution and, perhaps, formation.Comment: Accepted for publication in A&

Prediction of Simulated 1,000 m Kayak Ergometer Performance in Young Athletes

This study aimed to develop a predictive explanatory model for the 1,000-m time-trial (TT) performance in young national-level kayakers, from biomechanical and physiological parameters assessed in a maximal graded exercise test (GXT). Twelve young male flat-water kayakers (age 16.1 ± 1.1 years) participated in the study. The design consisted of 2 exercise protocols, separated by 48 h, on a kayak ergometer. The first protocol consisted of a GXT starting at 8 km.h−1 with increments in speed of 1 km.h−1 at each 2-min interval until exhaustion. The second protocol comprised the 1,000-m TT. Results: In the GXT, they reached an absolute (Formula presented.) O2max of 3.5 ± 0.7 (L.min−1), a maximum aerobic power (MAP) of 138.5 ± 24.5 watts (W) and a maximum aerobic speed (MAS) of 12.8 ± 0.5 km/h. The TT had a mean duration of 292.3 ± 15 s, a power output of 132.6 ± 22.0 W and a (Formula presented.) O2max of 3.5 ± 0.6 (L.min−1). The regression model [TT (s) = 413.378–0.433 × (MAP)−0.554 × (stroke rate at MAP)] presented an R2 = 84.5%. Conclusion: It was found that (Formula presented.) O2max, stroke distance and stroke rate during the GXT were not different from the corresponding variables ((Formula presented.) O2peak, stroke distance and stroke rate) observed during the TT. The MAP and the corresponding stroke rate were strong predicting factors of 1,000 m TT performance. In conclusion, the TT can be useful for quantifying biomechanical parameters (stroke distance and stroke rate) and to monitor training induced changes in the cardiorespiratory fitness ((Formula presented.) O2max)

The dusty environment of HD 97300 as seen by Herschel and Spitzer

Aims. We analyze the surroundings of HD 97300, one of two intermediate-mass stars in the Chamaeleon I star-forming region. The star is known to be surrounded by a conspicuous ring of polycyclic aromatic hydrocarbons (PAHs). Methods. We present infrared images taken with Herschel and Spitzer using 11 different broad-band filters between 3.6 um and 500 um. We compare the morphology of the emission using cuts along different position angles. We construct spectral energy distributions, which we compare to different dust models, and calculate dust temperatures. We also derive opacity maps and analyze the density structure of the environment of HD 97300. Results. We find that HD 97300 has no infrared excess at or below 24 um, confirming its zero-age main-sequence nature. The morphology of the ring is very similar between 3.6 um and 24 um. The emission at these wavelengths is dominated by either PAH features or PAH continuum. At longer wavelengths, only the northwestern part of the ring is visible. A fit to the 100-500 um observations suggests that the emission is due to relatively warm (~26 K) dust. The temperature gradually decreases with increasing distance from the ring. We find a general decrease in the density from north to south, and an approximate 10% density increase in the northeastern part of the ring. Conclusions. Our results are consistent with the theory that the ring around HD 97300 is essentially a bubble blown into the surrounding interstellar matter and heated by the star.Comment: 6 pages, 3 figures, accepted for publication in A&

Human–robot interaction in industrial settings: perception of multiple participants at a crossroad intersection scenario with different courtesy cues

In environments shared with humans, Autonomous Mobile Robots (AMRs) should be designed with human-aware motion-planning skills. Even when AMRs can effectively avoid humans, only a handful of studies have evaluated the human perception of mobile robots. To establish appropriate non-verbal communication, robot movement should be legible and should consider the human element. In this paper, a study that evaluates humans’ perceptions of different AMR courtesy behaviors at industrial facilities, particularly at crossing areas, is presented. To evaluate the proposed kinesic courtesy cues, we proposed five tests (four proposed cues—stop, deceleration, retreating, and retreating and moving aside—and one control test) with a set of participants taken two by two. We assessed three different metrics, namely, the participants’ self-reported trust in AMR behavior, the legibility of the courtesy cues in the participants’ opinions, and the behavioral analysis of the participants related to each courtesy cue tested. The retreating courtesy cue, regarding the legibility of the AMR behavior, and the decelerate courtesy cue, regarding the behavioral analysis of the participants’ signs of hesitation, are better perceived from the forward view. The results obtained regarding the participants’ self-reported trust showed no significant differences in the two participant perspectives.NORTE-06-3559-FSE-000018, integrated in the invitation NORTE-59-2018-41, aimed at the Hiring of Highly Qualified Human Resources, co-financed by the Regional Operational Programme of the North 2020, thematic area of Competitiveness and Employment, through the European Social Fund (ESF). This work was also supported by FCT–Fundação para a Ciência e Tecnologia within the R&D Units Project Scope: UIDB/00319/2020

Candida albicans in patients with oronasal communication and obturator prostheses

Patients using obturator prostheses often present denture-induced stomatitis. In order to detect the presence of oral Candida albicans in patients with oronasal communications and to evaluate the effectiveness of a topical antifungal treatment, cytological smears obtained from the buccal and palatal mucosa of 10 adult patients, and from the nasal acrylic surface of their obturator prostheses were examined. A therapeutic protocol comprising the use of oral nystatin (Mycostatin®) and prosthesis disinfection with sodium hypochlorite was prescribed for all patients. Seven patients were positive for C. albicans in the mucosa, with 1 negative result for the prosthetic surface in this group of patients. Post-treatment evaluation revealed the absence of C. albicans on prosthesis surface and on the oral mucosa of all patients. The severity of the candidal infection was significantly higher in the palatal mucosa than in the buccal mucosa, but similar in the palatal mucosa and prosthesis surface, indicating that the mucosa underlying the prosthesis is more susceptible to infection. The therapeutic protocol was effective in all cases, which emphasizes the need for denture disinfection in order to avoid reinfection of the mucosa.Os pacientes portadores de prótese obturadora freqüentemente apresentam estomatite protética. Com o objetivo de detectar a presença de Candida albicans oral em pacientes com comunicação oronasal e avaliar a eficácia de um tratamento tópico antifúngico foi realizada citologia esfoliativa da mucosa palatina e jugal e da superfície acrílica nasal da prótese obturadora. O protocolo terapêutico consistiu de nistatina (Mycostatin®) para tratamento da mucosa oral e uma solução de hipoclorito de sódio para desinfecção da prótese. Sete pacientes (70%) apresentaram resultado positivo para C. albicans na mucosa, com um resultado negativo para a superfície protética neste grupo. A avaliação após o tratamento revelou ausência de C. albicans na mucosa oral de todos os pacientes, bem como na superfície protética. A infecção por C. albicans das mucosas jugal e palatina diferiram significantemente, enquanto que a mucosa palatina e a superfície protética apresentaram valores semelhantes. O grau de infecção da mucosa palatina foi significantemente maior quando comparado àquele da mucosa jugal e semelhante ao apresentado pela prótese, sugerindo que a mucosa subjacente à prótese é mais susceptível à infecção. O protocolo terapêutico foi efetivo em todos os casos, o que enfatiza a necessidade da desinfecção protética para se evitar a reinfecção da mucosa oral

Objetivos SMART: Uma reflexão sobre a sua implementação no processo de cuidados à pessoa com doença mental

Na Unidade Curricular Estágio V – Enfermagem em Saúde Mental e Psiquiatria, no 3ºAno 1ºSemestre do Curso de Enfermagem 1ºCiclo, no âmbito do processo de cuidados à pessoa com doença mental surgiu a oportunidade de planear intervenções tendo por base os objetivos SMART. Um dos componentes na recuperação da pessoa é a definição de objetivos (Parsons et al., 2016). O método SMART, defende que os objetivos criados devem ser: Específicos (Specific), Mensuráveis, Atingíveis, Realistas e Temporais para que sejam atingidos mais facilmente e com sucesso (Drucker citado por Paiva, 2016). Objetivo Partilhar a reflexão sobre a implementação dos objetivos SMART no processo de cuidados à pessoa com doença mental. Metodologia Como metodologia para revisitar a aprendizagem desenvolvida em contexto de estágio consideramos a reflexão sobre ação pois esta tem um papel significativo na compreensão e integração do acontecimento (Perrenoud, 2011), mobilizando o ciclo reflexivo de Gibbs (Santos e Fernandes, 2004). Resultados A implementação dos objetivos SMART requer identificar a área na qual se quer atuar, estabelecer os objetivos SMART e a Goal attainment scaling, ferramenta utilizada para providenciar uma medida quantificável ao objetivo, e estabelecer um plano com intervenções para colmatar problemas identificados durante o processo para atingir o objetivo proposto (Borgen et al., 2020). Conclusão A reflexão sobre as aprendizagens realizadas, assim como o seu impacto no desenvolvimento pessoal e construção profissional futura, vão ao encontro do defendido por Shaw et al. (2015) a ética dos objetivos SMART consiste na colaboração com as pessoas, de modo a empoderá-las dos objetivos criados. Relevância para a Enfermagem A mobilização de objetivos SMART no âmbito do processo de cuidados facilita o trabalho colaborativo do enfermeiro com a pessoa com doença mental. Referências Bibliográficas Borgen I. M. H., Lovstad M., Andelic N., Hauger S., Sigurdardottir S.,Soberg H.L., Sveen U., Forslund M. V., Kleffelgard I., Lindstad M., Winter L., Roe C. (2020, Março). Traumatic brain injury—needs and treatment options in the chronic phase: Study protocol for a randomized controlled community-based intervention. Trials, 1 (21), pp. 1-14. Disponível em: https://trialsjournal.biomedcentral.com/track/pdf/10.1186/s13063-020-4195-5.pdf Paiva, E. C. P. (2016). A utilização do método smart para redefinir os objetivos estratégicos da liderança: Um estudo de caso aplicado em um fornecedor de peças plásticas da indústria automobilística. Monografia de Especialização em Gestão Empresarial, Universidade de Taubaté, Taubaté, São Paulo, Brasil. Disponível em: http://repositorio.unitau.br:8080/jspui/bitstream/20.500.11874/1231/1/Edson%20de%20Carv alho%20Paiva.pdf Parsons J. G. M., Plant S. E., Slark J., Tyson S. F., (2016, Novembro). How active are patients in setting goals during rehabilitation after stroke? A qualitative study of clinician perceptions. Disability and Rehabilitation, 3 (40), pp. 309-316. Disponível em: https://www.tandfonline.com/doi/full/10.1080/09638288.2016.1253115 Perrenoud, P. (2011). A Prática Reflexiva do Professor: Profissionalização e Razão Pedagógica. São Paulo: Artmed Editora Santos, E., Fernandes, A. (2004). Prática Reflexiva: Guia para a Reflexão Estruturada. Revista Referência, 11, pp.59-62. Disponível em: https://rr.esenfc.pt/rr/index.php?module=rr&target=publicationDetails&pesquisa=&id_artigo =2064&id_revista=5&id_edicao=10 Shaw, R. L., Pattison, H. M., Holland, C., Cooke R. (2015, Janeiro). Be SMART: examining the experience of implementing the NHS Health Check in UK primary care. BMC Family Practice, 1 (16), pp. 1-8. Disponível em: https://bmcfampract.biomedcentral.com/track/pdf/10.1186/s12875-014-0212-7.pdfN/

Radiative Transfer in Prestellar Cores: A Monte Carlo Approach

We use our Monte Carlo radiative transfer code to study non-embedded prestellar cores and cores that are embedded at the centre of a molecular cloud. Our study indicates that the temperature inside embedded cores is lower than in isolated non-embedded cores, and generally less than 12 K, even when the cores are surrounded by an ambient cloud of small visual extinction (Av~5). Our study shows that the best wavelength region to observe embedded cores is between 400 and 500 microns, where the core is quite distinct from the background. We also predict that very sensitive observations (~1-3 MJy/sr) at 170-200 microns can be used to estimate how deeply a core is embedded in its parent molecular cloud. Finally, we present preliminary results of asymmetric models of non-embedded cores.Comment: 8 pages, 15 figures, to appear in the conference proceedings of "Open Issues in Local Star Formation and Early Stellar Evolution", held in Ouro Preto (Brazil), April 5-10, 200

Rotation of the pre-stellar core L1689B

The search for the onset of star formation in pre-stellar cores has focussed on the identification of an infall signature in the molecular line profiles of tracer species. The classic infall signature is a double peaked line profile with an asymmetry in the strength of the peaks such that the blue peak is stronger. L1689B is a pre-stellar core and infall candidate but new JCMT HCO+ line profile data, presented here, confirms that both blue and red asymmetric line profiles are present in this source. Moreover, a dividing line can be drawn between the locations where each type of profile is found. It is argued that it is unlikely that the line profiles can be interpreted with simple models of infall or outflow and that rotation of the inner regions is the most likely explanation. A rotational model is developed in detail with a new 3D molecular line transport code and it is found that the best type of model is one in which the rotational velocity profile is in between solid body and Keplerian. It is firstly shown that red and blue asymmetric line profiles can be generated with a rotation model entirely in the absence of any infall motion. The model is then quantitively compared with the JCMT data and an iteration over a range of parameters is performed to minmize the difference between the data and model. The results indicate that rotation can dominate the line profile shape even before the onset of infall.Comment: Accepted by MNRAS, 7 pages, 4 figure