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A study of learning motivation of senior high schools by applying unity and mblock on programming languages courses

Journal of Physics: Conference Series 2020年第1期1456卷

作者： L H Peng M-H Bai I Siswanto National Yunlin University of Science and Technology Department of Creative Design. University Road Section 3DouliouYunlin 64002. Taiwan. Doctoral Program Graduate School of Design National Yunlin University of Science and Technology. University RoadSection 3DouliouYunlin 64002. Taiwan. Automotive Engineering Education Department Faculty of Engineering Universitas Negeri Yogyakarta. Indonesia.

This study aims to explore whether high school students can enhance students' learning motivation through challenging learning situationsin programming courses. This study was conducted for 12th-grade students in high school. The experiment lasted for eight weeks. Measurements included Pre- and post-tests measure MSLQ (Motivated Strategies for Learning Questionnaire) and the performance of programming. The experimental group learning design the game interactive project in Unity with C# programming language, and the control group learning build Arduino interactive project in mBlock with block-based programming. The results showed that there was no significant difference in performance, but the learning motivation of the experimental group was lower than that of the control group.

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Correction to: Use of meat resources in the Early Pleistocene assemblages from Fuente Nueva 3 (Orce, Granada, Spain)

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Archaeological and Anthropological Sciences 2022年第5期14卷 1-1页

作者： Yravedra, José Solano, José Antonio Courtenay, Lloyd A. Saarinen, Juha Linares‑Matás, Gonzalo Luzón, Carmen Serrano‑Ramos, Alexia Herranz‑Rodrigo, Darío Cámara, José Miguel Ruiz, Auxiliadora Titton, Stefania Rodríguez‑Alba, Juan José Mielgo, Clara Blain, Hugues‑Alexandre Agustí, Jordi Sánchez‑Bandera, Christian Montilla, Eva Toro‑Moyano, Isidro Fortelius, Mikael Oms, Oriol Barsky, Deborah Jiménez‑Arenas, Juan Manuel Department of Prehistory Ancient History and Archaeology Complutense University of Madrid Madrid Spain C.A.I. Archaeometry and Archaeological Analysis Complutense University Madrid Spain Department of Prehistory and Archaeology University of Sevilla Seville Spain Department of Cartographic and Land Engineering Higher Polytechnic School of Avila University of Salamanca Avila Spain Department of Geosciences and Geography University of Helsinki Helsinki Finland School of Archaeology St. Hugh’s College University of Oxford Oxford UK History and Arts Doctoral Program University of Granada Granada Spain GEOREC Master Program University of Granada Granada Spain Department d’Historia i Historia de l’Art Universitat Rovira I Virgili (URV) Tarragona Spain Institut Català de Paleoecologia Humana I Evolució Social Tarragona Spain Institució Catalana de Recerca I Estudis Avançats (ICREA) Barcelona Spain Museum of the First Settlers of Europe “Josep Gibert” Granada Spain Archaeological and Ethnological Museum of Granada Granada Spain Department of Geology Unitat d’Estratigrafia University of Barcelona Barcelona Spain Department of Prehistory and Archaeology University of Granada Granada Spain Institute of Peace and Conflict Research University of Granada Granada Spain

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Bandgap in orthorhombic thin lead halide perovskite (CsPbBr3) nanosheets measured from STEM-EELS

arXiv

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arXiv 2020年

作者： Brescia, Rosaria Toso, Stefano Ramasse, Quentin Manna, Liberato Downing, Clive Calzolari, Arrigo Bertoni, Giovanni Electron Microscopy Facility Istituto Italiano di Tecnologia Via Morego 30 Genova16163 Italy Nanochemistry Department Istituto Italiano di Tecnologia Via Morego 30 Genova16163 Italy International Doctoral Program in Science Universita Cattolica del Sacro Cuore Brescia25121 Italy SuperSTEM SciTech Daresbury Science and Innovation Campus Keckwick Lane DaresburyWA4 4AD United Kingdom School of Chemical and Process Engineering & School of Physics University of Leeds LeedsLS29JT United Kingdom CRANN and AMBER Research Centers Trinity College Dublin Dublin 2 Ireland School of Chemistry Trinity College Dublin Dublin 2 Ireland CNR - Istituto Nanoscienze Via Campi 213/A Modena41125 Italy

Inorganic lead halide perovskites are promising candidates for optoelectronic applications, due to their bandgap tunability, high photoluminescence quantum yield, and narrow emission line widths. In particular, they offer the possibility to vary the bandgap as a function of the halide composition and dimension/shape of the crystals at the nanoscale. Here we present an aberration-corrected scanning transmission microscopy (STEM) study of extended nanosheets of CsPbBr3 directly demonstrating their orthorhombic crystal structure and their lateral termination with Cs-Br planes. The bandgaps from individual nanosheets are measured by monochromated electron energy loss spectroscopy (EELS). We find an increase of the bandgap starting at thicknesses below 10 nm, confirming the less dramatic effect of 1D confinement in nanosheets compared to the 3D confinement observed in quantum dots, as predicted by density functional theory calculations and optical spectroscopy data from ensemble measurements. Copyright © 2020, The Authors. All rights reserved.

关键词： Nanosheets

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Characterization of the mechanical vibration signals associated with unbalance and misalignment in rotating machines, using the cepstrum transformation and the principal component analysis

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IOP Conference Series: Materials Science and engineering 2020年第1期844卷

作者： C L Sandoval-Rodriguez J G Ascanio Villabona C G Cárdenas-Arias A D Rincon-Quintero B E Tarazona-Romero Energy Systems Automation and Control Research Group (GISEAC) Design and materials research group (DIMAT) Electromechanical Engineering Faculty of Natural Sciences and Engineering Technological Units of Santander (UTS) Road No 9-82 students 680005 Bucaramanga Colombia. Energy in Building Research Group (ENEDI) Doctoral Program in Energy Efficiency and Sustainability in Engineering and Architecture Department of Machines and Thermal Engines University of the Basque Country (UPV / EHU) Engineer Torres Quevedo Square 1 48013 Bilbao BI Spain.

In the present document, the Cepstrum transform and the analysis of principal components were used to differentiate amplitudes in the mechanical vibrations produced by unbalance and misalignment with respect to a reference group. This document requires three stages. It begins with levelling in order to establish the control group. The unbalancing was carried out with a known mass located in the two radial distances of the first and second flywheels. The misalignment was made by running the sliding supports back 0.5, 1.0 and 1.5 degrees. In the second stage, Matlab algorithms were created for both cepsctrum and main component analysis. In the last stage the obtained data were analyzed identifying the differences that may exist in the analyzed records. The project focused on the use of Matlab to find differences at a frequency of 30 Hz. The results obtained made it possible to determine that it is possible to find differences with the proposed methodology.

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Manufacture of hybrid pieces using recycled R-PET, polypropylene PP and cocoa pod husks ash CPHA, by pneumatic injection controlled with LabVIEW Software and Arduino Hardware

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IOP Conference Series: Materials Science and engineering 2020年第1期844卷

作者： A D Rincón-Quintero L A Del Portillo-Valdés A Meneses-Jacomé C G Cárdenas-Arias C L Sandoval-Rodriguez J G Ascanio-Villabona B E Tarazona-Romero J A Sandoval-Baldión J C Ortiz-Ríos R A Mantilla-Olejua Design and materials research group (DIMAT) Automation and Control Energy Systems Research Group (GISEAC) Electromechanical engineering Faculty of Natural Sciences and Engineering Technological Units of Santander (UTS) Calle de los estudiantes No 9-82 680005 Bucaramanga Colombia. Energy in Building research group (ENEDI) Doctoral Program in Energy Efficiency and Sustainability in Engineering and Architecture Department of Machines and Thermal Engines University of the Basque Country (UPV/EHU) Engineer Torres Quevedo Plaza 1 48013 Bilbao BI España.

The research consists of the design and automation of a pneumatic injector, applying LabVIEW software through an integrated Arduino hardware module, programming through an interface, the pressure that guarantees the geometric quality in the models obtained. The final result shows a piece designed in mass fraction with 40% polypropylene resin (PP), 40% recycled polyethylene terephthalate in the form of scales (R-PET) and 20% from cocoa pod husks ash (CPHA). Likewise, the platform allows to define and control the conditions of generation of the product, defining a pattern according to the type and the mass proportion between the resin of PP, R-PET and CPHA. In addition, the design of the mechanical and thermal elements, consisting of the piston and the system of clamp-type resistors, the pneumatic injection means and the raw material feed gate, improve the efficiency and effectiveness of the equipment.

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Incidence of corrosion in low voltage electrical conductor

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IOP Conference Series: Materials Science and engineering 2020年第1期844卷

作者： J G Ascanio-Villabona A D Rincón-Quintero C G Cardenas-Arias C L Sandoval-Rodriguez Automation and Control Energy Systems Research Group (GISEAC) Design and materials research group (DIMAT) Electromechanical engineering Faculty of Natural Sciences and Engineering Technological Units of Santander (UTS) Calle de los students No 9-82 680005 Bucaramanga Colombia. Energy in Building research group (ENEDI) Doctoral Program in Energy Efficiency and Sustainability in Engineering and Architecture Department of Machines and Thermal Engines University of the Basque Country (UPV/EHU) Engineer Torres Quevedo Plaza 1 48013 Bilbao BI España.

This research used a salt spray booth to generate accelerated corrosion in a copper conductor, AWG 12-gauge purity of 95.95%, this caliber used in residential electrical installations according RETIE Chapter 3 Article 20 and NTC 2050 338. Additionally, to provide an enabling stage of corrosion, type mouse tail splices were made. The amount of corrosion is measured by weight loss, and incidence of corrosion in transport was evaluated from two perspectives: difference active at the beginning and end of the test power, and the change in resistance of the specimen measured at different times of the experiment. The test piece was subjected to a flow of alternating current into a low voltage system, while corrosion occurred. Using two single-phase two-wire electronic meters, the rate of power supply circuit test was recorded, to check for changes in the energy carried from exposure to the corrosive environment wire. The data collected showed that exposure times of the samples in the salt spray chamber involvement was not very noticeable in the copper wire, highlighting small corrosion spots. Similarly, the energy no changes were observed to induce corrosion, however, the resistance of the wire showed a total change of up to 2.4 [milliohms]. The data collected showed that exposure times of the samples in the salt spray chamber involvement was not very noticeable copper wire, highlighting small corrosion spots. Similarly, the energy no changes were observed to induce corrosion, however, the resistance of the wire showed a total change of up to 2.4 [milliohms].

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Development of an artificial vision system that allows non-destructive testing on flat concrete slabs for surface crack detection by processing of digital images in MATLAB

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IOP Conference Series: Materials Science and engineering 2020年第1期844卷

作者： BE Romero-Tarazona CL Rodriguez-Sandoval JG Villabonai-Ascanio A D Rincón-Quintero Automation and Control Energy Systems Research Group (GISEAC) Design and materials research group (DIMAT) Electromechanical Engineering Faculty of Natural Sciences and Engineering Technological Units of Santander (UTS) Road No 9-82 students 680005 Bucaramanga Colombia. Energy in Building research group (ENEDI) Doctoral Program in Energy Efficiency and Sustainability in Engineering and Architecture Department of Machines and Thermal Engines University of the Basque Country (UPV/EHU) Engineer Torres Quevedo Plaza 1 48013 Bilbao BI España

A computing tool based on an intelligent algorithm generates new alternatives for an early crack detection on flat concrete slab in a surface testing. First, a system able to autonomously detect a surface crack, by means of a digital image processing system has been developed. This system carries on an effective selection of data by an algorism bound to a specialized MATLAB software that can assess in full detail the surface conditions of a concrete slab, and finding out any affected spot.

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Building a prototype for functional analysis of the energy potential of the water flow in pipe ½ 'using microturbines applied to Unidades Tecnológicas de Santander

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IOP Conference Series: Materials Science and engineering 2020年第1期844卷

作者： J G Ascanio-Villabona C L Sandoval-Rodriguez A D Rincón-Quintero B E Tarazona-Romero R E Paez-Castro Automation and Control Energy Systems Research Group (GISEAC) Design and materials research group (DIMAT) Electromechanical engineering Faculty of Natural Sciences and Engineering Technological Units of Santander (UTS) Calle de los estudiantes No 9-82 680005 Bucaramanga Colombia. Energy in Building research group (ENEDI) Doctoral Program in Energy Efficiency and Sustainability in Engineering and Architecture Department of Machines and Thermal Engines University of the Basque Country (UPV/EHU) Engineer Torres Quevedo Plaza 1 48013 Bilbao BI España.

The project aims to build a working prototype for analysis of potential energy of water flow in pipe ½ 'by using micro tangential turbines with a loss running low, constituting a small-scale model for the study power generation thereof, setting parameters related to a hydraulic distribution system operation residential drinking water. Taking advantage of the electric power, a microturbine is obtained by decanting flow through it. The research methodology is descriptive quantitative approach, to develop the project initially performed a literature review, followed by identification of the electrical variables and characteristics of the prototype to generate a simulation of a real hydraulic circuit, it followed this comes the recognition and selection of the elements for retrofitting. Thus, as looking through prototype and analysis of the energy potential, generating an academic, social and environmental impact on the institution; since being pioneers in this type of project it is expected to generate the conceptual foundations in the community, enabling understanding of the use of this resource and future implementation. social and environmental in the institution; since being pioneers in this type of project it is expected to generate the conceptual foundations in the community, enabling understanding of the use of this resource and future implementation. social and environmental in the institution; since being pioneers in this type of project it is expected to generate the conceptual foundations in the community, enabling understanding of the use of this resource and future implementation.

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Face recognition system using Viola Jones, histograms of oriented gradients and multi-class support vector machine

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Journal of Physics: Conference Series 2019年第4期1341卷

作者： M Arafah A Achmad Indrabayu I S Areni Doctoral Student of Electrical Engineering Department Hasanuddin University Makassar Indonesia Informatics Study Program STMIK AKBA Makassar Indonesia Department of Electrical Engineering Hasanuddin University Makassar Indonesia Department of Informatics Hasanuddin University Makassar Indonesia

This study aims to determine the best distance to install a CCTV camera in identifying a person's face in the passenger inspection area at the airport, which can be developed for suspect detection systems. The training data used is in the form of an image with five different angles per person, while the testing data is in the form of video. The initial stage conducted is face detection based on local features (a pair of eyes, nose, and mouth) in the input data using the Viola-Jones method. The face detection results process with pre-processing, feature extraction, and classification. In the pre-processing stage, the Brightness Enhancement (BE), Grayscale and Contrast Limited Adaptive Histogram Equalization (CLAHE) methods are used to improve the quality of the detected face. Furthermore, the feature extraction and classification stages use the Histogram of Oriented Gradient (HOG) and the Multi-class Support Vector Machine (MSVM) methods, respectively. The result shows that the best accuracy obtained is 86.76% for a CCTV camera distance of 300 cm and a height of 250 cm.

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Characterization of polyethersulfone (PES) membrane entrapping with ginger extract (GE) as a green additive

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IOP Conference Series: Materials Science and engineering 2021年第1期1087卷

作者： A Fahrina N Arahman S Mulyati S Aprilia M R Bilad Department of Chemical Engineering Universitas Syiah Kuala Jl. Syeh A. Rauf No. 7 Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Universitas Syiah Kuala Jl. Syeh A. Rauf No. 7 Banda Aceh 23111 Indonesia Graduate School of Environmental Management Universitas Syiah Kuala Jl. Tgk Chik Pante Kulu No. 5 Banda Aceh 23111 Indonesia Atsiri Research Center Universitas Syiah Kuala Jl. Syeh A. Rauf No. 7. Banda Aceh 23111 Indonesia Research Center for Environmental and Natural Resources Universitas Syiah Kuala Jl. Hamzah Fansuri No. 4 Darussalam Banda Aceh 23111 Indonesia Chemical Engineering Department Universiti Teknologi PETRONAS Seri Iskandar Perak 32610 Malaysia

The hydrophilicity of the membrane surface plays an essential role in improving membrane filtration performance. Better hydrophilicity could facilitate higher water permeation and prevent fouling phenomena. In this research, a green additive from ginger extract (GE) was employed to improve the polyethersulfone (PES) membrane hydrophilicity. The PES/GE membrane was fabricated via the phase inversion method by dispersing GE powder in PES/NMP solution using sonication followed by mechanical stirred. The influence of ginger extract (GE) on the PES membrane was characterized in terms of hydrophilicity, morphological structure, porosity, water permeation, chemical composition, and mechanical property. Water contact angle measurements showed that PES/GE membrane with 0.1% GE has the highest hydrophilicity. Scanning Electron Microscopy (SEM) indicated a porous finger-like structure on the cross-section membrane after the addition of GE.

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