scholarly journals Smartphones as detector the speed of sound: A classroom explanation and demonstration

2021 ◽  
Vol 2145 (1) ◽  
pp. 012070
Author(s):  
T Thongsuk ◽  
A Intanin
Keyword(s):  
Everyday Life ◽  
Speed Of Sound ◽  
Educational Innovation ◽  
Simple Calculation ◽  
Experimental Results ◽  
General Science ◽  
Percentage Difference ◽  
Smartphone Sensors ◽  
The Mean ◽  
Faculty Of Education

Abstract This paper presents how smartphones determine the speed of sound (C) with a classroom explanation and demonstration to design a variety of lab instruments. Smartphone sensors such as mics and speakers were used as experimental tools by students for calculating the value of speed of sound. Mathematics is used to describe physics principles using only the mean of repetitive experimental results. After conducting an experiment with 43 students, majoring in general science, faculty of education and educational innovation, Kalasin University, the students report the value of the speed of sound nearly to theoretical values with a percentage difference of less than 0.1%, equipment used in everyday life in the classroom, equipment that is cheap, along with a simple calculation of speed of sound, is an advantage of this experiment.

scholarly journals Open Access Articles Have a Greater Research Impact Than Articles Not Freely Available

2006 ◽  
Vol 1 (3) ◽  
pp. 57
Author(s):  
Suzanne Pamela Lewis
Keyword(s):  
Open Access ◽  
Political Science ◽  
Web Of Science ◽  
Research Impact ◽  
Sample Population ◽  
Article Title ◽  
Electronic Engineering ◽  
Percentage Difference ◽  
The Mean ◽  
Leading Journals

A review of: Antelman, Kristin. “Do Open-Access Articles Have a Greater Research Impact?” College & Research Libraries 65.5 (Sep. 2004): 372-82. Objective – To ascertain whether open access articles have a greater research impact than articles not freely available, as measured by citations in the ISI Web of Science database. Design – Analysis of mean citation rates of a sample population of journal articles across four disciplines. Setting – Journal literature across the disciplines of philosophy, political science, mathematics, and electrical and electronic engineering. Subjects – A sample of 2,017 articles across the four disciplines published between 2001 and 2002 (for political science, mathematics, and electrical and electronic engineering) and between 1999 and 2000 (for philosophy). Methods – A systematic presample of articles for each of the disciplines was taken to calculate the necessary sample sizes. Based on this calculation, articles were sourced from ten leading journals in each discipline. The leading journals in political science, mathematics, and electrical and electronic engineering were defined by ISI’s Journal Citation Reports for 2002. The ten leading philosophy journals were selected using a combination of other methods. Once the sample population had been identified, each article title and the number of citations to each article (in the ISI Web of Science database) were recorded. Then the article title was searched in Google and if any freely available full text version was found, the article was classified as open access. The mean citation rate for open access and non-open access articles in each discipline was identified, and the percentage difference between the means was calculated. Main results – The four disciplines represented a range of open access uptake: 17% of articles in philosophy were open access, 29% in political science, 37% in electrical and electronic engineering, and 69% in mathematics. There was a significant difference in the mean citation rates for open access articles and non-open access articles in all four disciplines. The percentage difference in means was 45% in philosophy, 51% in electrical and electronic engineering, 86% in political science, and 91% in mathematics. Mathematics had the highest rate of open access availability of articles, but political science had the greatest difference in mean citation rates, suggesting there are other, discipline-specific factors apart from rate of open access uptake affecting research impact. Conclusion – The finding that, across these four disciplines, open access articles have a greater research impact than non-open access articles, is only one aspect of the complex changes that are presently taking place in scholarly publishing and communication. However, it is useful information for librarians formulating strategies for building institutional repositories, or exploring open access publishing with patrons or publishers.

scholarly journals Contour Detection for Fibre of Preserved Szechuan Pickle Based on Dilated Convolution

2019 ◽  
Vol 9 (13) ◽  
pp. 2684 ◽  
Author(s):  
Hongyang Li ◽  
Lizhuang Liu ◽  
Zhenqi Han ◽  
Dan Zhao
Keyword(s):  
Edge Detection ◽  
State Of The Art ◽  
Contour Detection ◽  
Experimental Results ◽  
Contour Method ◽  
Class Differences ◽  
Dilated Convolution ◽  
The Mean ◽  
Art Performance

Peeling fibre is an indispensable process in the production of preserved Szechuan pickle, the accuracy of which can significantly influence the quality of the products, and thus the contour method of fibre detection, as a core algorithm of the automatic peeling device, is studied. The fibre contour is a kind of non-salient contour, characterized by big intra-class differences and small inter-class differences, meaning that the feature of the contour is not discriminative. The method called dilated-holistically-nested edge detection (Dilated-HED) is proposed to detect the fibre contour, which is built based on the HED network and dilated convolution. The experimental results for our dataset show that the Pixel Accuracy (PA) is 99.52% and the Mean Intersection over Union (MIoU) is 49.99%, achieving state-of-the-art performance.

Vibratory Feeding by Nonsinusoidal Vibration—Optimum Wave Form

1985 ◽  
Vol 107 (2) ◽  
pp. 188-195 ◽  
Author(s):  
S. Okabe ◽  
Y. Kamiya ◽  
K. Tsujikado ◽  
Y. Yokoyama
Keyword(s):  
Experimental Results ◽  
Wave Form ◽  
Velocity Wave ◽  
The Mean ◽  
Straight Lines ◽  
Vibratory Conveyor ◽  
Theoretical Results ◽  
Vibratory Feeding

This paper presents the conveying velocity on a vibratory conveyor whose track is vibrated by nonsinusoidal vibration. The velocity wave form of the vibrating track is approximated by six straight lines, and five distortion factors of the wave form are defined. Considering the modes of motion of the particle, the mean conveying velocity is calculated for various conditions. Referring to these results, the optimum wave form is clarified analytically. The theoretical results show that the mean conveying velocity is considerably larger than that of ordinary feeders if the proper conveying conditions are chosen. The theoretical results are confirmed by experimental results.

scholarly journals Adaptive Broadcasting Mechanism for Bandwidth Allocation in Mobile Services

2014 ◽  
Vol 2014 ◽  
pp. 1-14
Author(s):  
Gwo-Jiun Horng ◽  
Chi-Hsuan Wang ◽  
Chih-Lun Chou
Keyword(s):  
Analytical Model ◽  
Bandwidth Allocation ◽  
Data Dissemination ◽  
Data Access ◽  
Experimental Results ◽  
Bandwidth Utilization ◽  
Access Latency ◽  
The Mean ◽  
Access Efficiency ◽  
Broadcast Program

This paper proposes a tree-based adaptive broadcasting (TAB) algorithm for data dissemination to improve data access efficiency. The proposed TAB algorithm first constructs a broadcast tree to determine the broadcast frequency of each data and splits the broadcast tree into some broadcast wood to generate the broadcast program. In addition, this paper develops an analytical model to derive the mean access latency of the generated broadcast program. In light of the derived results, both the index channel’s bandwidth and the data channel’s bandwidth can be optimally allocated to maximize bandwidth utilization. This paper presents experiments to help evaluate the effectiveness of the proposed strategy. From the experimental results, it can be seen that the proposed mechanism is feasible in practice.

scholarly journals IMPLEMENTACIÓN DE METODOLOGÍAS COOPERATIVAS EN LA DOCENCIA UNIVERSITARIA: EXPERIENCIAS EN LA FACULTAD DE EDUCACIÓN Y DEPORTE DE VITORIA-GASTEIZ

2018 ◽  
Vol 22 (3) ◽  
Author(s):  
Ainhoa Gómez Pintado ◽  
Vanesa Rojo Robas ◽  
Ana Zuazagoitia Rey-Baltar
Keyword(s):  
Basque Country ◽  
Educational Innovation ◽  
Teaching Objectives ◽  
El Sistema ◽  
Innovation Project ◽  
Innovación Educativa ◽  
Faculty Of Education ◽  
The University ◽  
Pais Vasco ◽  
Selection Of

Resumen:Actualmente es visible la necesidad de una renovación metodológica, de reformar el sistema educativo centrado en la enseñanza del profesor, para conseguir un modelo centrado en el aprendizaje activo del alumnado. Para realizar esta difícil transición metodológica numerosos estudios apuestan por el uso de las metodologías activas. Este trabajo, inscrito en el marco de un Proyecto de Innovación Educativa de la Universidad del País Vasco (UPV/EHU), tiene como objetivo determinar la efectividad y validez de varias de estas técnicas cooperativas, implementadas en distintas materias, cursos y especialidades en la Facultad de Educación y Deporte de Vitoria-Gasteiz, partiendo del análisis de las valoraciones que sobre ellas ha realizado el alumnado. Los resultados, recogidos a través de cuestionarios, apuntan a una excelente aceptación de las técnicas empleadas por parte del alumnado; constatando su efectividad en el desarrollo del aprendizaje activo y cooperativo y confirmando la importancia de la selección de cada técnica en función de los objetivos docentes, así como su modificación y adecuación a estos y al grupo o asignatura en el que se implementa. Abstract:Currently is visible the need for a methodological renewal, that is, the need for a reform of the education system focused on teacher education, for a model focused on active learning of students. To perform this difficult methodological transition, numerous studies opt for the use of active methodologies. This work, written in the framework of an Educational Innovation Project of the University of the Basque Country (UPV/EHU), aims to determine the effectiveness and validity of several cooperative techniques, implemented in different subjects, courses and specialties in the Faculty of Education and Sports of Vitoria-Gasteiz, starting from the analysis of the assessments about the techniques made by students. The results, collected through questionnaires, point to an excellent acceptance of the techniques used by the students; confirming its effectiveness in the development of active and cooperative learning, and confirming the importance of the selection of each technique according to the teaching objectives, as well as its modification and adaptation to these and to the group or subject in which it was implemented.

scholarly journals A supervisão pedagógica e a formação contínua: mitos e percepções por meio de narrativas dos professores do Distrito de Monapo

2021 ◽  
Vol 16 ◽  
pp. 1-17
Author(s):  
Wilson Profírio Nicaquela ◽  
Adelino Inácio Assane
Keyword(s):  
Professional Development ◽  
Narrative Research ◽  
Educational Innovation ◽  
Administrative Practice ◽  
Catholic University ◽  
Supervision Process ◽  
Teachers Experiences ◽  
Faculty Of Education

What perceptions do teachers have about pedagogical supervision? This may be the founding question of a narrative research with teachers of Monapo district, in Nampula Province, Northern of Mozambique, which we developed within the scope of the PhD course in Educational Innovation, at the Faculty of Education and Communication of the Catholic University of Mozambique. The objective was to analyze teachers’ experiences on pedagogical supervision. For this, we asked teachers to produce texts narrating their experiences at school, as objects and/or subjects of the supervision process. This exercise is considered as the methodology of our study. To achieve the objective, we took as indicators: the role of the supervisor, the skills of the supervisor, and the perception of what supervision is and the challenges of supervision. Through the testimonies of the teachers, we could conclude that there is evidence at the level of the implications for the supervisee, because the procedures employed, in their perception, are not the most suitable for the monitoring and development of the teaching work, since they understand supervision as an administrative practice, with a supervisory and punitive function. Hence, they do not consider it as an auxiliary instrument for their professional development. Thus, when the supervision takes the character of assistance to the class, this process has been considered an “event” and not a practical space/training moment for some supervisors and/or teachers.

scholarly journals Quantum Calculations to Estimate the Heat of Hydrogenation Theoretically

2020 ◽  
Author(s):  
Ali Amir Khairbek
Keyword(s):  
Unsaturated Hydrocarbon ◽  
Experimental Results ◽  
Basis Set ◽  
Good Linear ◽  
Complete Basis ◽  
Complete Basis Set ◽  
Complete Basis Set Limit ◽  
The Mean ◽  
Experimental Values ◽  
Linear Correlations

Standard enthalpies of hydrogenation of 29 unsaturated hydrocarbon compounds were calculated in the gas phase by CCSD(T) theory with complete basis set cc-pVXZ, where X = DZ, TZ, as well as by complete basis set limit extrapolation. Geometries of reactants and products were optimized at the M06-2X/6-31g(d) level. This M06-2X geometries were used in the CCSD(T)/cc-pVXZ//M06-2X/6-31g(d) and cc-pV(DT)Z extrapolation calculations. (MAD) the mean absolute deviations of the enthalpies of hydrogenation between the calculated and experimental results that range from 8.8 to 3.4 kJ mol−1 based on the Comparison between the calculation at CCSD(T) and experimental results. The MAD value has improved and decreased to 1.5 kJ mol−1 after using complete basis set limit extrapolation. The deviations of the experimental values are located inside the “chemical accuracy” (±1 kcal mol−1 ≈ ±4.2 kJ mol−1) as some results showed. A very good linear correlations between experimental and calculated enthalpies of hydro-genation have been obtained at CCSD(T)/cc-pVTZ//M06-2X/6-31g(d) level and CCSD(T)/cc-pV(DT)Z extrapolation levels (SD =2.11 and 2.12 kJ mol−1, respectively).

A Study on the Robustness of Pitch-Range Estimation from Brief Speech Segments

2020 ◽  
Vol 30 (01) ◽  
pp. 2050003
Author(s):  
Wenjie Peng ◽  
Kaiqi Fu ◽  
Wei Zhang ◽  
Yanlu Xie ◽  
Jinsong Zhang
Keyword(s):  
Speaker Recognition ◽  
Native Speakers ◽  
Estimation Method ◽  
Experimental Results ◽  
Percentage Error ◽  
Range Estimation ◽  
Pitch Range ◽  
Speech Segment ◽  
The Mean ◽  
Speech Segments

Pitch-range estimation from brief speech segments could bring benefits to many tasks like automatic speech recognition and speaker recognition. To estimate pitch range, previous studies have proposed to utilize deep-learning-based models with spectrum information as input. They demonstrated that such method works and could still achieve reliable estimation results when the speech segment is as brief as 300 ms. In this study, we evaluated the robustness of this method. We take the following scenarios into account: (1) a large number of training speakers; (2) different language backgrounds; and (3) monosyllabic utterances with different tones. Experimental results showed that: (1) The use of a large number of training speakers improved the estimation accuracies. (2) The mean absolute percentage error (MAPE) rate evaluated on the L2 speakers is similar to that on the native speakers. (3) Different tonal information will affect the LSTM-based model, but this influence is limited compared to the baseline method which calculates pitch-range targets from the distribution of [Formula: see text]0 values. These experimental results verified the efficiency of the LSTM-based pitch-range estimation method.

Measurements of the Fluorescence Decay Time in Mixed Solutions Using Pulse Fluorometery

1982 ◽  
Vol 37 (2) ◽  
pp. 197-198
Author(s):  
R. K. Bauer ◽  
R. Twardowski
Keyword(s):  
Malachite Green ◽  
Decay Time ◽  
Rhodamine 6G ◽  
Fluorescence Decay ◽  
Experimental Results ◽  
Mixed Solutions ◽  
Fluorescence Decay Time ◽  
The Mean

Abstract The mean fluorescence decay time for rhodamine 6G (donor) in the presence of malachite green (acceptor) has been investigated using a pulse fluorometer. The experimental results have been compared with theoretical ones obtained earlier [1].

Analysis of Turbulent Thermal Convection Between Horizontal Plates

1983 ◽  
Vol 105 (4) ◽  
pp. 789-794 ◽  
Author(s):  
M. Kaviany ◽  
R. Seban
Keyword(s):  
Temperature Distribution ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Thermal Convection ◽  
Equation Model ◽  
Experimental Results ◽  
Mixing Length ◽  
Mean Temperature ◽  
The Mean ◽  
The One

The one-equation model of turbulence is applied to the turbulent thermal convection between horizontal plates maintained at constant temperatures. A pseudo-three-layer model is used consisting of a conduction sublayer adjacent to the plates, a turbulent region within which the mixing length increases linearly, and a turbulent core within which the mixing length is a constant. It is assumed that the Nusselt number varies with the Rayleigh number to the one-third power. As a result, the steady-state distributions of the turbulent kinetic energy and the mean temperature are obtrained and presented in closed forms. These results include the effects of Prandtl number. The predictions are compared with the available experimental results for different Prandtl and Rayleigh numbers. Also included are the predictions of Kraichnan, which are based on a less exact analysis. The results of the one-equation model are in fair agreement with the experimental results for the distribution of the turbulent kinetic energy and the mean temperature distribution. The predictions of Kraichnan are in better agreement with the experimental results for the mean temperature distribution.

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