Note: A phase synchronization photography method for AC discharge

2018 ◽  
Vol 89 (5) ◽  
pp. 056107 ◽  
Author(s):  
Zhicheng Wu ◽  
Qiaogen Zhang ◽  
Jingtan Ma ◽  
Lei Pang
Keyword(s):  
Phase Synchronization ◽  
Ac Discharge ◽  
Photography Method

Exploring Visual Methods in Teaching Tourism

2020 ◽  
Vol 25 (2) ◽  
pp. 203-214
Author(s):  
Ana Isabel Rodrigues
Keyword(s):  
Visual Culture ◽  
Visual Stimuli ◽  
Visual Methods ◽  
Self Reflection ◽  
Moving Images ◽  
Educational Environments ◽  
Ways Of Thinking ◽  
And Behavior ◽  
Photography Method

Humankind is becoming increasingly image based. Visual culture is everywhere: it surrounds us all with still and moving images. Based on this pictorial change, working with the visual in education has the potential for engaging students in a process of self-reflection in an effort to change ways of thinking and behavior, aiming to consolidate concepts taught in classes. Nevertheless, there are key elements to consider as a set of methodologies and practices. The aim of this study is to explore multiple ways of working with the visual, within educational environments, specifically in classes taught in the second and third year of a degree in Tourism. Two examples of visual methodologies were considered for this study. An image-based exercise through the use of tourism cartoons as visual stimuli to evoke opinions and incite thoughts was fully implemented. Analysis was undertaken and the results are presented. A reflexive photography method is also proposed as another example for a visual-based exercise. The results from the cartoons exercise demonstrate that knowledge is continuously derived from the experience of the learner. The student's impressions and full comprehension of the concepts taught in a particular subject were achieved with this exercise.

scholarly journals Numerical Analysis of the Dynamic Interaction between Two Closely Spaced Vertical-Axis Wind Turbines

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2286
Author(s):  
Yutaka Hara ◽  
Yoshifumi Jodai ◽  
Tomoyuki Okinaga ◽  
Masaru Furukawa
Keyword(s):  
Wind Turbines ◽  
Power Distribution ◽  
Phase Synchronization ◽  
Average Power ◽  
Vertical Axis ◽  
Turbine Rotor ◽  
Mean Power ◽  
Vertical Axis Wind Turbines ◽  
Fluid Body ◽  
First Time

To investigate the optimum layouts of small vertical-axis wind turbines, a two-dimensional analysis of dynamic fluid body interaction is performed via computational fluid dynamics for a rotor pair in various configurations. The rotational speed of each turbine rotor (diameter: D = 50 mm) varies based on the equation of motion. First, the dependence of rotor performance on the gap distance (gap) between two rotors is investigated. For parallel layouts, counter-down (CD) layouts with blades moving downwind in the gap region yield a higher mean power than counter-up (CU) layouts with blades moving upwind in the gap region. CD layouts with gap/D = 0.5–1.0 yield a maximum average power that is 23% higher than that of an isolated single rotor. Assuming isotropic bidirectional wind speed, co-rotating (CO) layouts with the same rotational direction are superior to the combination of CD and CU layouts regardless of the gap distance. For tandem layouts, the inverse-rotation (IR) configuration shows an earlier wake recovery than the CO configuration. For 16-wind-direction layouts, both the IR and CO configurations indicate similar power distribution at gap/D = 2.0. For the first time, this study demonstrates the phase synchronization of two rotors via numerical simulation.

A comparison of the Remote Food Photography Method and the Automated Self-Administered 24-hour Dietary Assessment Tool for measuring full day dietary intake among school-aged children

2021 ◽  
pp. 1-26
Author(s):  
Traci A. Bekelman ◽  
Corby K. Martin ◽  
Susan L. Johnson ◽  
Deborah H. Glueck ◽  
Katherine A. Sauder ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Energy Intake ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Assessment Tool ◽  
Dietary Assessment ◽  
Ease Of Use ◽  
Self Report ◽  
Food Photography ◽  
Photography Method

Abstract The limitations of self-report measures of dietary intake are well known. Novel, technology-based measures of dietary intake may provide a more accurate, less burdensome alternative to existing tools. The first objective of this study was to compare participant burden for two technology-based measures of dietary intake among school-age children: the Automated-Self Administered 24-hour Dietary Assessment Tool-2018 (ASA24-2018) and the Remote Food Photography Method (RFPM). The second objective was to compare reported energy intake for each method to the Estimated Energy Requirement for each child, as a benchmark for actual intake. Forty parent-child dyads participated in 2, 3-day dietary assessments: a parent proxy-reported version of the ASA24 and the RFPM. A parent survey was subsequently administered to compare satisfaction, ease of use and burden with each method. A linear mixed model examined differences in total daily energy intake (TDEI) between assessments, and between each assessment method and the EER. Reported energy intake was 379 kcal higher with the ASA24 than the RFPM (p=0.0002). Reported energy intake with the ASA24 was 231 kcal higher than the EER (p = 0.008). Reported energy intake with the RFPM did not differ significantly from the EER (difference in predicted means = −148 kcal, p = 0.09). Median satisfaction and ease of use scores were 5 out of 6 for both methods. A higher proportion of parents reported that the ASA24 was more time consuming than the RFPM (74.4% vs. 25.6%, p = 0.002). Utilization of both methods is warranted given their high satisfaction among parents.

scholarly journals In-phase synchronization between two auto-oscillating bubbles

2019 ◽  
Vol 4 (4) ◽  
Author(s):  
Dang Minh Nguyen ◽  
Muttikulangara Swaminathan Sanathanan ◽  
Jianmin Miao ◽  
David Fernandez Rivas ◽  
Claus-Dieter Ohl
Keyword(s):  
Phase Synchronization ◽  
Oscillating Bubbles

Study on ultra-precision phase synchronization technique employing phase-locked loop

2021 ◽  
Vol 17 (3) ◽  
pp. 134-139
Author(s):  
Wan-peng Zhang ◽  
Hong Wu ◽  
Wei-feng Zhou ◽  
Ying-xin Zhao ◽  
Zhi-yang Liu ◽  
...  
Keyword(s):  
Phase Synchronization ◽  
Phase Locked Loop ◽  
Precision Phase ◽  
Ultra Precision

scholarly journals Modifications in the Topological Structure of EEG Functional Connectivity Networks during Listening Tonal and Atonal Concert Music in Musicians and Non-Musicians

2021 ◽  
Vol 11 (2) ◽  
pp. 159
Author(s):  
Almudena González ◽  
Manuel Santapau ◽  
Antoni Gamundí ◽  
Ernesto Pereda ◽  
Julián J. González
Keyword(s):  
Topological Structure ◽  
Phase Synchronization ◽  
Random Network ◽  
Small World ◽  
Surrogate Data ◽  
Musical Structure ◽  
Beta Band ◽  
Tonal Music ◽  
Frequency Bands ◽  
Concert Music

The present work aims to demonstrate the hypothesis that atonal music modifies the topological structure of electroencephalographic (EEG) connectivity networks in relation to tonal music. To this, EEG monopolar records were taken in musicians and non-musicians while listening to tonal, atonal, and pink noise sound excerpts. EEG functional connectivities (FC) among channels assessed by a phase synchronization index previously thresholded using surrogate data test were computed. Sound effects, on the topological structure of graph-based networks assembled with the EEG-FCs at different frequency-bands, were analyzed throughout graph metric and network-based statistic (NBS). Local and global efficiency normalized (vs. random-network) measurements (NLE|NGE) assessing network information exchanges were able to discriminate both music styles irrespective of groups and frequency-bands. During tonal audition, NLE and NGE values in the beta-band network get close to that of a small-world network, while during atonal and even more during noise its structure moved away from small-world. These effects were attributed to the different timbre characteristics (sounds spectral centroid and entropy) and different musical structure. Results from networks topographic maps for strength and NLE of the nodes, and for FC subnets obtained from the NBS, allowed discriminating the musical styles and verifying the different strength, NLE, and FC of musicians compared to non-musicians.

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