bluuebunny/crossref_metadata_2025_split huggingface dataset:
A high‐frequency transformer‐based buck‐boost AC‐AC converter with high efficiency and wide range conversion ratio for DVR application
Authors: Abdoli Iman , Ahmed Hafiz Furqan , Mosallanejad Ali 
Published: March 2023

AbstractThis paper proposes an isolated single‐phase impedance‐source ac‐ac converter with a wide voltage conversion ratio and a safe commutation strategy. The new topology has noteworthy features like continuous input current, galvanic isolation, and non‐inverting and inverting buck‐boost modes with a wide voltage coverage. Also, only one switch operates with high‐frequency PWM signals, reducing the semiconductor switching loss. The galvanic isolation has been achieved by employing a high‐frequency transformer (HFT), eliminating low‐frequency transformers (LFT) from the topology. A safe commutation strategy has been designed and applied to the converter to mitigate the voltage and current spikes on power switches, which eliminates additional snubber circuits. A prototype has been designed to validate the suggested converter performance in stand‐alone and DVR applications. The peak obtained efficiency equals 96.1% and 94.9% in inverting and non‐inverting step‐down and step‐up modes, respectively, validated by an accurate power loss model and experimental results. Experimental results confirm the theory and operation of the proposed converter.
Gaia colour-magnitude diagrams of young open clusters
Authors: Negueruela I. , de Burgos A. 
Published: March 2023

Context. Automated analyses of Gaia astrometric data have led to the discovery of many new high-quality open cluster candidates. When a good determination of their parameters is available, these objects become excellent tools for investigating the properties of our Galaxy.
Aims. We explore whether young open clusters can be readily identified from Gaia data alone by studying the properties of their Gaia colour-magnitude diagrams. We also want to compare the results of a traditional cluster analysis with those of automated methods.
Methods. We selected three young open cluster candidates from the UBC catalogue, ranging from a well-populated object with a well-defined sequence to a poorly populated and poorly defined candidate. We obtained classification spectra for the brightest stars in each. We redetermined members based on EDR3 data and fitted isochrones to derive the age, distance, and reddening.
Results. All three candidates are real clusters with ages below 100 Ma. UBC 103 is a moderately populous cluster, with an age around 70 Ma. At a distance of ∼3 kpc, it forms a binary cluster with nearby NGC 6683. UBC 114 is a relatively proximal (∼1.5 kpc) poorly populated cluster containing two early-B stars. UBC 587 is a dispersed and very young (≤10 Ma) cluster located at ∼3 kpc, behind the Cygnus X region, which may be a valuable tracer of the Orion arm.
Conclusions. The OCfinder methodology for the identification of new open clusters is extremely effective, with even poor candidates resulting in interesting detections. The presence of an almost vertical photometric sequence in the Gaia colour-magnitude diagram is a safe way to identify young open clusters. Automated methods for the determination of cluster properties give approximate solutions, but these are still subject to difficulties. There is some evidence suggesting that artificial intelligence systems may systematically underestimate extinction, which may impact in the age determination.
Magnesiummangel unter einer Therapie mit Cyclophosphamid –
Medikamenteninteraktion
Authors: Kisters Klaus , Kühne Sandra , Gröber Uwe 
Published: March 2023

ZusammenfassungMagnesiumverluste unter einer medikamentösen Therapie sind in der Medizin
häufig, wobei bes. ältere Menschen betroffen sind. Ein
Magnesiummangel wird dabei oft nicht diagnostiziert, obwohl klinische Symptome
bereits vorliegen. Auch unter einer Therapie mit Cyclophosphamid kommt es zu
Magnesiumverlusten. Die Kontrolle des Magnesiumstatus und ggf. eine
adäquate Substitution sind erforderlich. Unzureichende
Magnesiumversorgung verschlechtert die Prognose der Patient*innen,
klinische Krankheitszeichen verstärken sich.
Who will excel in advanced endoscopy? A study assessing the criteria and perceptions of experts with regard to selection of ERCP and EUS trainees
Authors: Campos Sara , Devière Jacques , Arvanitakis Marianna 
Published: March 2023

Abstract
Background and study aims Training program directors (TPDs) and experts play a crucial role in selecting ERCP/EUS trainees and determining the workforce in endoscopy. Additionally, prospective trainees should know what TPDs/experts expect from them. Nonetheless, the criteria and perceptions used in this selection have not been clarified. The aim of this study was to identify TPD/expert values/beliefs regarding personal attributes needed for selecting trainees that can excel and those which may lead to disqualification; compare perspectives between TPDs/experts and trainees regarding the selection process and critical trainee characteristics; and investigate the general approach and satisfaction regarding current application process for ERCP/EUS training.
Methods We conducted a web-based survey to collect general opinion and data regarding the application process and trainee selection and disqualification from training. European TPDs/experts and trainees were invited to participate.
Results Thirty-six TPDs/experts and 25 trainees from 18 countries responded. The application process is mainly driven by individual request (86.1 %). Almost half of TPDs/experts felt only moderately (38.9 %) to slightly (8.3 %) satisfied with the current application process. TPDs/experts value a diversity of trainee characteristics, but mainly traits such as “honesty,” “being a team player,” and “self-awareness” (72.2 % each). Technical skills ranked seventh as considered “extremely important.” “Disregard for patient welfare” and “lack of work ethic” were the most common reasons for disqualification. TPDs/experts and trainees agreed in most questions.
Conclusions This survey outlines trainee selection criteria for ERCP/EUS training. Non-technical skills are the most valued by TPDs/experts. While knowledge and technical expertise are clearly important, understanding that professional attitudes are highly regarded may help direct the application process more effectively.
Hydration of Arylacetylenes Promoted by the Photothermal ­Effect of Gold Nanoparticles
Authors: Zhang Yanhua , Yuan Hongyan , Su Kaixuan , Ji Mengyuan , Xue Huimin , Chen Hongyu 
Published: March 2023

AbstractWith the help of the photothermal effect of gold nanoparticles (AuNPs), the hydration of the arylacetylenes to synthesize carbonyl compounds is successfully achieved. The reaction proceeds smoothly for various substrates and the ketone products are obtained in good isolated yields up to 91%. The successful gram-scale and sunlight-exposure experiments illustrate the potential application of this method in the future organic syntheses.
O número relativo de linfócitos é menor quando o agente etiológico da doença de Pott é isolado com sucesso
Authors: Zanon Igor de Barcellos , Meves Robert , Klautau Giselle Burlamaqui 
Published: March 2023

Resumo
Objetivo Descrever as características clínico-epidemiológicas, laboratoriais e radiológicas da espondilodiscite tuberculosa na população brasileira e avaliar se há diferenças entre pacientes em que o agente etiológico da doença de Pott foi isolado ou não.
Métodos Os pacientes diagnosticados com tuberculose (TB) da coluna (doença de Pott) foram acompanhados em um hospital quaternário entre 2009 e 2019 e divididos em 2 grupos: isolamento positivo (IP) do agente etiológico (por baciloscopia, cultura ou teste rápido molecular positivo) e isolamento negativo (IN) do agente etiológico.
Resultados De um total de 26 pacientes com diagnóstico de TB da coluna, 21 (80,7%) eram do sexo masculino, e a média de idade era de 40 ± 22,5 anos. As contagens médias de linfócitos foram maiores no grupo IN (25,35 ± 13,08; p = 0,025) do que no grupo IP (14,18 ± 7,48). Além disso, a relação monócito/linfócito foi menor no grupo IN (0,39 ± 0,22; p = 0,009) do que no grupo IP (0,89 ± 0,65). O número relativo de linfócitos maior ou igual a 16,7 teve sensibilidade de 76,9% e especificidade de 62,5% no grupo IN. A razão monócito/linfócito maior ou igual a 0,58 teve sensibilidade de 84,6% e especificidade de 75,0% no grupo IN.
Conclusão Não observamos diferenças em relação às características clínico-epidemiológicas e radiológicas entre os dois grupos experimentais. No entanto, o grupo IN apresentou maior número de linfócitos e menor razão monócito/linfócito.
Qualidade de vida e satisfação de pacientes com idade superior ou inferior a 65 anos submetidos a artroplastia total de joelho
Authors: Oliveira Lucas Silveira Rabello de , Costa Lauro Augusto Veloso , Asfora Brenand Medeiros , Loureiro Paulo Henrique , Ferretti Mário , Lenza Mário 
Published: March 2023

Resumo
Objetivo Comparar a qualidade de vida e satisfação 2 anos após a artroplastia total de joelho em indivíduos com idade ≥ e < 65 anos e identificar fatores preditivos de pior evolução clínica e baixo nível de satisfação nestes pacientes.
Métodos Trata-se de uma coorte retrospectiva de dados de pacientes com diagnóstico de osteoartrite de joelho submetidos a artroplastia total primária de joelho entre 2014 e 2018 (n = 190). Os resultados clínicos foram avaliados de acordo com os seguintes escores: escala visual analógica (EVA) de dor, EQ-5D-3L e EUROQOL-VAS (escalas de qualidade de vida), nível de satisfação do paciente e escala funcional do Knee Injury and Osteoarthritis Outcome Score (KOOS, na sigla em inglês). Estes dados foram coletados por meio de questionário aplicado no período pré-operatório e 1, 3, 12 e 24 meses após a cirurgia.
Resultados Os pacientes < 65 anos apresentaram valores significativamente menores (piora clínica) nas escalas KOOS-dor e KOOS-sintomas. Não houve diferenças nas principais pontuações clínicas de dor, função e qualidade de vida após o procedimento, nem no índice de satisfação com a cirurgia, entre pacientes < 65 anos em comparação com aqueles ≥ 65 anos. Observamos também que os pacientes não satisfeitos com o procedimento à avaliação de 24 meses apresentaram resultados clínicos em alguns escores analisados (KOOS-dor e EQ-VAS) semelhantes aos dos pacientes que se declararam satisfeitos.
Conclusão Os escores que avaliam dor, função, qualidade de vida e índice de satisfação são semelhantes entre os pacientes < 65 anos e aqueles ≥ 65 anos.
Electric-field induced entropic effects in liquid water
Authors: Conti Nibali Valeria , Maiti Sthitadhi , Saija Franz , Heyden Matthias , Cassone Giuseppe 
Published: March 2023

Externally applied electric fields in liquid water can induce a plethora of effects with wide implications in electrochemistry and hydrogen-based technologies. Although some effort has been made to elucidate the thermodynamics associated with the application of electric fields in aqueous systems, to the best of our knowledge, field-induced effects on the total and local entropy of bulk water have never been presented so far. Here, we report on classical TIP4P/2005 and ab initio molecular dynamics simulations measuring entropic contributions carried by diverse field intensities in liquid water at room temperature. We find that strong fields are capable of aligning large fractions of molecular dipoles. Nevertheless, the order-maker action of the field leads to quite modest entropy reductions in classical simulations. Albeit more significant variations are recorded during first-principles simulations, the associated entropy modifications are small compared to the entropy change involved in the freezing phenomenon, even at intense fields slightly beneath the molecular dissociation threshold. This finding further corroborates the idea that electrofreezing (i.e., the electric-field-induced crystallization) cannot take place in bulk water at room temperature. In addition, here, we propose a molecular-dynamics-based analysis (3D-2PT) that spatially resolves the local entropy and the number density of bulk water under an electric field, which enables us to map their field-induced changes in the environment of reference H2O molecules. By returning detailed spatial maps of the local order, the proposed approach is capable of establishing a link between entropic and structural modifications with atomistic resolution.
Measuring mental wellbeing of children via human-robot interaction
Authors: Abbasi Nida Itrat , Spitale Micol , Jones Peter B. , Gunes Hatice 
Published: March 2023

Abstract
During the last decade, children have shown an increasing need for mental wellbeing interventions due to their anxiety and depression issues, which the COVID-19 pandemic has exacerbated. Socially Assistive Robotics have been shown to have a great potential to support children with mental wellbeing-related issues. However, understanding how robots can be used to aid the measurement of these issues is still an open challenge. This paper presents a narrative review of child-robot interaction (cHRI) papers (IEEE ROMAN proceedings from 2016–2021 and keyword-based article search using Google Scholar) to investigate the open challenges and potential knowledge gaps in the evaluation of mental wellbeing or the assessment of factors affecting mental wellbeing in children. We exploited the SPIDER framework to search for the key elements for the inclusion of relevant studies. Findings from this work (10 screened papers in total) investigate the challenges in cHRI studies about mental wellbeing by categorising the current research in terms of robot-related factors (robot autonomy and type of robot), protocol-related factors (experiment purpose, tasks, participants and user sensing) and data related factors (analysis and findings). The main contribution of this work is to highlight the potential opportunities for cHRI researchers to carry out measurements concerning children’s mental wellbeing.
Exploring space for robot mistakes in child robot interactions
Authors: Stower Rebecca , Abdelghani Rania , Tschopp Marisa , Evangelista Keegan , Chetouani Mohamed , Kappas Arvid 
Published: March 2023

Abstract
Understanding the impact of robot errors in child-robot-interactions (CRI) is critical, as current technological
systems are still limited and may randomly present a variety of mistakes during interactions with children. In this study we
manipulate a task-based error of a NAO robot during a semi-autonomous computational thinking task implemented with the Cozmo
robot. Data from 72 children aged 7–10 were analysed regarding their attitudes towards NAO (social trust, competency trust,
liking, and perceived agency), their behaviour towards the robot (self-disclosure, following recommendations), as well as their
task performance. We did not find quantitative effects of the robot’s error on children’s self-reported attitudes, behaviour, or
task performance. Age was also not significantly related to either social attitudes or behaviours towards NAO, although there were
some age-related differences in task performance. Potential reasons behind the lack of statistical effects and limitations of the
study with regards to the manipulation of robot errors are discussed and insights into the design of future CRI studies
provided.
Space-time exchanged symplectic integrator approach to temporal-mode selective optical three-wave mixing frequency conversion
Authors: Nomura Kenya , Sako Tokuei 
Published: March 2023

Abstract
A space-time exchanged symplectic integrator (SI) method is developed to solve the three-wave resonance interaction equations commonly used in describing a number of fundamental nonlinear optical phenomena, such as second harmonic generation, optical parametric amplification, etc. Exchanging the roles of the space and time coordinates allows us to solve these nonlinearly coupled equations with hard-wired boundary conditions using a highly accurate SI scheme instead of standard finite difference methods. The developed method is then applied to the optical three-wave mixing frequency conversion processes in which an input signal light is converted into an idler light guided by a strong pump pulse. The temporal-mode selectivity in the frequency conversion processes is examined by systematically varying system parameters and the results are summarized as contour maps of selectivity on the ‘group-slownesses’, defined by the inverse of the group velocities, of the signal pulse and of the idler pulse relative to that of the pump pulse. The areas showing the highest peaks on these

selectivity

maps

undergo significant and characteristic changes in their positions as well as the heights for different values of the coupling strength γ. The observed trends are rationalized on the basis of the Schmidt modes obtained by decomposing the two-time transfer function that fully characterizes the dynamics of the signal–idler wave conversion.
The interplay of

symmetry with the Rabi oscillation in the non-Hermitian double Jaynes–Cummings model
Authors: Tian Zekai , Man Zhong-Xiao , Zhu Baogang 
Published: March 2023

Abstract
We study the dynamical evolution and

symmetry breaking of the non-Hermitian double Jaynes–Cummings model with

symmetry. The results indicate that there exist symmetry maintained and breaking phase in this model, and the non-Hermitian terms lead to different behaviors in two phases. In the

symmetry phase, there exists stable Rabi oscillation caused by the interaction between photons and atoms. At the exceptional point, the system shows critical property that the probabilities in each state over time tend to be equal. The system will undergo a transition from the

symmetry phase to the

symmetry breaking phase, as increasing the coupling constant. In the

symmetry breaking phase, complex eigenvalues appear, and the probability in each state increases monotonically in an exponential form. This study can help us to understand the effect of symmetry on the interaction between photons and atoms in non-Hermitian systems.
In-plane elastic property prediction of straight-arc coupled auxetic structures
Authors: Zhang Xiaolong , Hao Huanan , Lu Xuhao , Tian Ruilan 
Published: March 2023

Abstract
Auxetic metamaterials with two components exhibit a wide variety of potential engineering applications due to their exotic mechanical properties. In this work, a novel straight-arc coupled structure (SACS) is designed by introducing a circular arc structure to a classical re-entrant structure. This work aims to explore the linear and geometrical nonlinear mechanical of SACS at large strains. According to Castigliano’s second theorem, the in-plane linear theoretical model is established to obtain equivalent Poisson’s ratio and elastic modulus. A geometrical nonlinear model is further established based on large deflection theory and chain algorithm. The finite element method is used to verify the prediction of the theoretical solution, and linear and nonlinear mechanical properties of the SACS are studied by numerical simulation. The influence of geometric parameter re-entrant angle and arc radius on the mechanical properties of the SACS is investigated to compare the linear and nonlinear mechanical properties. The linear numerical simulation of SACS with two transverse ribs (SACS-TR) and classical re-entrant honeycomb structure with two transverse ribs (CRS-TR) is carried out to analyze the in-plane elastic properties. These results demonstrate that considering the geometric nonlinear model can predict the actual structural deformation more accurately, which is verified by the quasi-static compression experiment results at large strains. The SACS design can enhance the auxetic effect and structure Young’s moduli under the same dimension.
Data recovery of 2D lifetime-based phosphor thermometry using deep neural networks
Authors: Jung Juyong , Kim Mirae , Cai Tao , Liu Yingzheng , Kim Kyung Chun 
Published: March 2023

Abstract
Thermographic phosphor (TP) thermometry has been widely used as one of the newly developed non-contact surface temperature measurement methods. However, temperature information is frequently lost locally because chemical bonding coatings are easily damaged during the measurement. This limits its application, such as in the case of jet impact, high-speed motion, high vibration, etc. We proposed to use of deep neural networks (DNNs) as a tool for recovering lost data. In this study, we captured the dynamic two-dimensional (2D) temperature field of jet impingement cooling a high temperature plate by TP thermometry. Different parts of the temperature information, including jet impact area and non-impact area, were then removed to assume the coating was damaged. A prediction model was established by the DNNs using the 2D space and time coordinates as the input dataset and using the temperature information corresponding to the coordinates as the output dataset. The removed temperature information was then recovered using the developed regression model and compared with the raw temperature field to evaluate predicted results. The results showed that the removed data can be successfully recovered using the established DNN prediction model, in which the predicted accuracy was greater than 94.94%. While in the central and the boundary area of the jet, the model has a relatively poor performance, which is mainly due to the large temperature gradients. These results indicate that the established DNN model can be used to recover the lost temperature information but it is limited for applications in regions with drastic temperature changes.
Ultra-thin gate insulator of atomic-layer-deposited AlO
x
and HfO
x
for amorphous InGaZnO thin-film transistors
Authors: Li Jiye , Guan Yuhang , Li Jinxiong , Zhang Yuqing , Zhang Yuhan , Chan ManSun , Wang Xinwei , Lu Lei , Zhang Shengdong 
Published: March 2023

Abstract
To strengthen the downscaling potential of top-gate amorphous oxide semiconductor (AOS) thin-film transistors (TFTs), the ultra-thin gate insulator (GI) was comparatively implemented using the atomic-layer-deposited (ALD) AlO
x
and HfO
x
. Both kinds of high-k GIs exhibit good insulating properties even with the physical thickness thinning to 4 nm. Compared to the amorphous indium-gallium-zinc oxide (a-IGZO) TFTs with 4 nm AlO
x
GI, the 4 nm HfO
x
enables a larger GI capacitance, while the HfO
x
-gated TFT suffers higher gate leakage current and poorer subthreshold slope, respectively originating from the inherently small band offset and the highly defective interface between a-IGZO and HfO
x
. Such imperfect a-IGZO/HfO
x
interface further causes noticeable positive bias stress instability. Both ALD AlO
x
and HfO
x
were found to react with the underneath a-IGZO channel to generate the interface defects, such as metal interstitials and oxygen vacancies, while the ALD process of HfO
x
gives rise to a more severe reduction of a-IGZO. Moreover, when such a defective interface is covered by the top gate, it cannot be readily restored using the conventional oxidizing post-treatments and thus desires the reduction-resistant pre-treatments of AOSs.