Human-robot interaction: Exploring the ability to express emotions by a social robot

Robots should have characteristics that make the interaction effective and fluent for a successful Human-Robot Interaction (HRI). Since the emotions play a fundamental role in the human interaction process, many robots are introduced facial expressions, speech, body movements, among others to deepen the HRI. This chapter presents the exploration, design, and evaluation of the recognition of emotions displayed by a social robot. Initially, a pre-experiment was done to program the emotions in a virtual prototype. Afterwards, a pilot study and two experiments were conducted by manipulating the robot facial expressions and body movements to evaluate the recognition of the emotions. The results show that joy, surprise, and sadness have higher correct recognition and fear, disgust, and anger reported as lower recognition. Further study is needed regarding body movement and displacement of the robot for disgust, fear, and anger. Moreover, a robot should be introduced in a specific context to increase the recognition of emotions.info:eu-repo/semantics/acceptedVersio

Physical mechanisms of interface-mediated intervalley coupling in Si

The conduction band degeneracy in Si is detrimental to quantum computing based on spin qubits, for which a nondegenerate ground orbital state is desirable. This degeneracy is lifted at an interface with an insulator as the spatially abrupt change in the conduction band minimum leads to intervalley scattering. We present a theoretical study of the interface-induced valley splitting in Si that provides simple criteria for optimal fabrication parameters to maximize this splitting. Our work emphasizes the relevance of different interface-related properties to the valley splitting.Comment: 4 pages, revised versio

Component-based programming for higher-order attribute grammars

This paper presents techniques for a component-based style of programming in the context of higher-oder attribute grammars (HAG). Attribute grammar components are "plugged in" into larger attribute grammar systems through higher-order attribute grammars. Higher-order attributes are used as (intermediate) "gluing" data structures.This paper also presents two attribute grammar components that can be re-used across different language-based tool specifications: a visualizer and animator of programs and a graphical user interface AG component. Both components are reused in the definition of a simple language processor. The techniques presented in this paper are implemented in LRC: a purely functional, higher-order attribute grammar-based system that generates language-based tools.(undefined

Model for quality assessment in small farms in Cape Verde

This study aims to perform a holistic quality assessment of Cape Verdean agricultural sector. To achieve this objective, we have constructed an innovative model – SQual4Agri – where the farming units’ internal dimension, external context, and the productivity itself were all brought up together. It includes instruments to assess Farmers' satisfaction toward the quality of services provided by the public departments, quality metrics to assess the organizational items in farming organization plus estimation of production. For the development of the (SQual4Agri) model, the researchers built a specific survey validated by experts in focus groups. After interpreting the collected data, the following phase was to adapt the instrument of the 5 Senses (5Ss) for small agricultural instances, and, finally, adapting the SERVPREF for the evaluation of rural services provided by official authorities. With the application of the SQual4Agri model in the Poilão Dam irrigation perimeter where seventy farmers were involved, we have concluded that it is quite needed and relevant the implementation of quality techniques and methodologies in agricultural production units. Another finding was, there is a lack of Cape Verde Farmers' awareness and information upon benefits with organizational development with special regard to quality issues. This evidence is positively related to findings in prior studies by Simões and Saraiva (2014) and Simões (2018), conducted in the islands of S. Nicolau and Santiago, respectively. The third finding indicates widespread dissatisfaction with the services provided by the Ministry of Agriculture and the Environment of Cape Verde. Despite this dissatisfaction, it is perceived that the farmer is satisfied with his own activity. This contradictory element may show the fatigue and discouragement caused by the difficulties of agriculture in Cape Verde and difficulties in the implementation of public policies in this area. The application of the SQual4Agri model also indicates large potential for public policies changing in the rural contexts with impacts on efficiency, quality, and productivity.info:eu-repo/semantics/acceptedVersio

An extremely rare association of multiple familial trichoepitheliomas and hereditary multiple osteochondromas

info:eu-repo/semantics/publishedVersio

Auditoria à prática profilática e incidência de náuseas e vómitos pós-operatórios (NVPO)

Introdução: As NVPO são uma das principais queixas dos doentes do pós-operatório. Este trabalho teve como objetivo registar a prática farmacológica para profilaxia de NVPO em cirurgia programada e avaliar a sua eficácia. Metodologia: Incluídos todos os doentes submetidos a cirurgia programada das especialidades de Cirurgia Geral, Urologia e Cirurgia Vascular entre 3 e 21 de Dezembro de 2012. Excluídos se alta<24horas(h), pós-operatório no Serviço Cuidados Intensivos/ Intermédios ou impossível acesso aos registos. Tendo como modelos o Score Apfel Simplificado e as recomendações para cirurgia de ambulatório(1) (Tabela 1), a profilaxia instituída foi dividida em adequada, a mais ou a menos; avaliação da ocorrência de NVPO na Unidade Cuidados Pós-Anestésicos e às 24h (registos anestésicos e entrevista). Resultados apresentados em percentagem. Aplicação teste qui quadrado com p<0,05 para significância. Resultados: Avaliados 255 doentes (excluídos 68, incluídos 187). Com 0-1 fator risco (FR) 34%, 2 FR 45%, 3-4 FR 21%. A profilaxia foi adequada em 53% dos doentes, a mais em 16% e a menos em 31%. Incidência total de NVPO - 22% (24% no grupo de doentes que fez profilaxia adequada e 20% no grupo de profilaxia inadequada (p=0.35012)). Neste último grupo 13% realizaram profilaxia a mais e 24% a menos. Resultados da incidência de NVPO por fator de risco na tabela 2. A incidência de NVPO por FR nos doentes com profilaxia adequada foi menor ou igual em todos os grupos em relação ao previsto no Score Apfel simplicado(1,2). No grupo que fez profilaxia inadequada, esta foi a menos principalmente no grupo de 2 FR, com 71% de NVPO; e foi a mais essencialmente no grupo com 1 FR (4 doentes, todos com NVPO). Incidência menor com anestesia locoregional (ALR) vs anestesia geral (AG) (13% vs 27%) (p<0.001). Discussão e Conclusões: A profilaxia foi adequada, segundo as recomendações para cirurgia de ambulatório, em cerca de metade dos doentes. Apesar da profilaxia adequada, nos grupos de FR 1 e 2 não houve redução da incidência de NVPO comparando com a prevista pelo score de Apfel, alertando para a importância de outros fatores de risco não previstos neste score e que estas recomendações poderão ser insuficientes para a profilaxia de NVPO em cirurgia em regime de internamento. A incidência de NVPO foi menor com ALR vs AG, corroborando a ALR como melhor opção em doentes de risco de NVPO (1,2). Estes resultados salientam a importância da adoção de estratégias para redução do risco basal

Métodos de controle do etileno na qualidade e conservação pós-colheita de frutas.

Aspectos gerais do meloeiro; Características gerais do melão Cantaloupe; Qualidade; Maturação dos frutos; Etileno; Qualidade pós-colheita de melão por meio do controle de etileno; Permanganato de potássio; 1-MCP; Atmosfera modificada passiva.bitstream/item/33968/1/Dc-111.pd

Transport through an impurity tunnel coupled to a Si/SiGe quantum dot

Achieving controllable coupling of dopants in silicon is crucial for operating donor-based qubit devices, but it is difficult because of the small size of donor-bound electron wavefunctions. Here we report the characterization of a quantum dot coupled to a localized electronic state, and we present evidence of controllable coupling between the quantum dot and the localized state. A set of measurements of transport through this device enable the determination of the most likely location of the localized state, consistent with an electronically active impurity in the quantum well near the edge of the quantum dot. The experiments we report are consistent with a gate-voltage controllable tunnel coupling, which is an important building block for hybrid donor and gate-defined quantum dot devices.Comment: 5 pages, 3 figure

Survival of pathogens on soybean debris under no-tillage and conventional tillage systems.

A study was conducted in the subtropical area of Southern Brazil to determine the survival of pathogens in soybean residues under conventional and no-tillage cultivation systems from March to September of 1998 and 1999. The pathogens most frequently isolated were Colletotrichum truncatum, Phomopsis spp., Cercospora kikuchii, Fusarium spp., Macrophomina phaseolina, and Rhizoctonia solani. Other fungi isolated were Myrothecium roridum, Penicillium sp., Chaetomium sp., Epicoccum sp., Corynespora cassiicola and Trichoderma sp. The percent of survival of each pathogen varied according to the month and the year. Survival of C. truncatum, Phomopsis spp. and C. kikuchii were significantly reduced (p<0.05) from the first to the last evaluation either on buried debris or maintained on the soil surface. On the other hand, M. phaseolina and Fusarium spp. were either not affected or favored by burying the debris. The frequency of recovery of Fusarium spp. increased specially in debris kept under the soil. The loss of biomass, measured by debris weight along the period of this study, showed a reduction of 44.4% in the conventional system and 34.9% in the no-tillage system in 1998, when rain was better distributed. In 1999, the reduction was 48.2% and 39.0% for the conventional and no-tillage system, respectively

Dispersively detected Pauli Spin-Blockade in a Silicon Nanowire Field-Effect Transistor

We report the dispersive readout of the spin state of a double quantum dot formed at the corner states of a silicon nanowire field-effect transistor. Two face-to-face top-gate electrodes allow us to independently tune the charge occupation of the quantum dot system down to the few-electron limit. We measure the charge stability of the double quantum dot in DC transport as well as dispersively via in-situ gate-based radio frequency reflectometry, where one top-gate electrode is connected to a resonator. The latter removes the need for external charge sensors in quantum computing architectures and provides a compact way to readout the dispersive shift caused by changes in the quantum capacitance during interdot charge transitions. Here, we observe Pauli spin-blockade in the high-frequency response of the circuit at finite magnetic fields between singlet and triplet states. The blockade is lifted at higher magnetic fields when intra-dot triplet states become the ground state configuration. A lineshape analysis of the dispersive phase shift reveals furthermore an intradot valley-orbit splitting $\Delta_{vo}$ of 145 $\mu$eV. Our results open up the possibility to operate compact CMOS technology as a singlet-triplet qubit and make split-gate silicon nanowire architectures an ideal candidate for the study of spin dynamics