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Problem solving process for heat and mass transfer modeling

AIP Conference Proceedings 2019年第1期2177卷

作者： Perepi Rajarajeswari M. Ravikumar 1Department of Computer science and Engineering Kingston Engineering College Vellore India 2Department of Mechanical Engineering Kingston Engineering College Vellore India

Normally in engineering, conceptual models provide formal model of the system. Mathematical modeling gives the systematic representation in terms of properties. Modeling process is performed by using design space analysis and mathematical equations and this can be performed with different design alternatives. Conceptual analysis of natural convection is described. In this paper the modeling of heat and mass transfer is performed with the concepts of heat and mass transfer and properties of objects in the design space. Numerical solution has been conducted for energy equation with different boundary conditions. The present work analyses the heat and mass transfer modeling process with mathematical equations.

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Atomistic investigation of diffusion welding of dissimilar materials through molecular dynamics simulation

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AIP Conference Proceedings 2020年第1期2256卷

作者： M. Zaenudin M. N. Mohammed Adhes Gamayel Ade Sunardi 1Department of Mechanical Engineering Faculty of Engineering and Computer Science Institut Teknologi & Kesehatan Jakarta (ITKJ) Jl. Jatiwaringin Raya No. 278 Pondok Gede 17411 Jakarta Indonesia 2Department of Engineering & Technology Faculty of Information Sciences and Engineering Management & Science University University Drive Off Persiaran Olahraga 40100 Shah Alam Selangor Malaysia

Molecular dynamics simulation of diffusion welding between aluminum and nickel has been performed and the tensile behavior of the as-welded material has been examined. Two slabs Al-Ni are being contacted directly to introduce diffusion between the two with certain parameters. Diffusion welding was performed at a temperature of 500 K, at the pressure of 10 MPa in the x-direction, and a holding time of 200 ps. The tensile test is performed at a strain value of 2.64e9/s. The results have shown that the displacement of atoms during diffusion welding significantly occurs from the beginning until it reaches about 10 ps. However, the movement of atoms experiencing a plateau stage and less atomic exchange is occurring afterward. nickel slab that has a better strength was able to maintain its fcc crystalline structure during diffusion welding and tensile test than aluminum which has lower strength. The higher melting point of Ni promoting better resistance in the interface to be deformed, while the lower melting point of Al has been promoting better bonding between the two that is promoted by the defects that occur at the interface. During the tensile test, the lower strength of Al made it randomly deformed and crack seems to occur. However, failure of the diffusion-welded Al-Ni has occurred around the interface. The ultimate tensile strength of the diffusion-welded Al-Ni reaches up to 4.166 GPa at a strain value of 0.07128.

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Neuro-symbolic interpretable AI for automatic COVID-19 patient-stratification based on standardised lung ultrasound data

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Proceedings of Meetings on Acoustics 2022年第1期46卷

作者： Leonardo Lucio Custode Federico Mento Sajjad Afrakhteh Francesco Tursi Andrea Smargiassi Riccardo Inchingolo Tiziano Perrone Giovanni Iacca Libertario Demi 1Department of Information Engineering and Computer Science University of Trento Trento TN ITALY leonardo.custode@unitn.it federico.mento@unitn.it sajjad.afrakhteh@unitn.it giovanni.iacca@unitn.it libertario.demi@unitn.it 2UOS Pneumologia di Codogno ASST Lodi Lodi ITALY francesco.tursi@asst-lodi.it 3Department of Medical and Surgical Sciences Fondazione Policlinico Universitario A. Gemelli IRCCS Rome ITALY andrea.smargiassi@policlinicogemelli.it riccardo.inchingolo@policlinicogemelli.it 4Department of Internal Medicine IRCCS San Matteo Pavia ITALY tiziano.perrone@gavazzeni.it

In the current pandemic, being able to efficiently stratify patients depending on their probability to develop a severe form of COVID-19 can improve the outcome of treatments and optimize the use of the available resources. To this end, recent studies proposed to use deep-networks to perform automatic stratification of COVID-19 patients based on lung ultrasound (LUS) data. In this work, we present a novel neuro-symbolic approach able to provide video-level predictions by aggregating results from frame-level analysis made by deep-networks. Specifically, a decision tree was trained, which provides direct access to the decision process and a high-level explainability. This approach was tested on 1808 LUS videos acquired from 100 patients diagnosed as COVID-19 positive by a RT-PCR swab test. Each video was scored by LUS experts according to a 4-level scoring system specifically developed for COVID-19. This information was utilised for both the training and testing of the algorithms. A five-folds cross-validation process was utilised to assess the performance of the presented approach and compare it with results achieved by deep-learning models alone. Results show that this novel approach achieves better performance (82% of mean prognostic agreement) than a threshold-based ensemble of deep-learning models (78% of mean prognostic agreement).

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Applications of temperature sensor cultivation fish and plant aquaponic with greenhouse for local food innovation

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AIP Conference Proceedings 2021年第1期2331卷

作者： Alimuddin Ria Arafiyah Yeyen Maryani Irma Saraswatia Masjudin Mustahal 1Department Of Electrical Engineering Faculty of Engineering University of Sultan Ageng Tirtayasa Jl Jenderal Sudirman Km.03 Cilegon Banten Indonesia 42435 2Department of Computer Science Faculty of Mathemetics and Natural Science Jakarta State University Jl Pemuda No 10 RT 8/RW 5 Rawamangun Pulo Gadung Kota Jakarta Timur Daerah Ibukota Jakarta Indonesia 13220 3Department of Chemical Engineering Faculty of Engineering University of Sultan Ageng TirtayasaJl Jenderal Sudirman Km.03 Cilegon Banten Indonesia 42435 4Department of Fishery Faculty of Agriculture University of Sultan Ageng TirtayasaJl Jakarta Raya Km 04 Pakupatan Serang Banten Indonesia 42124

Aquaponic Cultivation Technology can be done inside the house or outside the home, this cultivation also produces plants and fish that can be used by the community with urban farming on local food. Aquaponic system fish farming is a culture system that can save land use and increase the efficiency of nutrient utilization from the rest of the feed and fish metabolism. The purpose is to design water temperature sensors on aeroponics and to test temperature sensors by validating others.. The design of an early warning system application due to a landslide there are several stages, namely: first, Designing a DS18B20 sensor on acuponics. Second, Testing the DS18B20. The measurement results will be stored on the scratchpad and read by the device. This sensor can measure temperatures in the range 0 ° -50 ℃. Microcontroller functions as an electronic circuit controller and stores the program in it. Microcontroller is called a single chip because the microcontroller has a memory and I / O devices. The test was carried out using a container containing chunks of ice. The test was carried out safely for 15 minutes and data was taken every minute. Testing the DS18B20 sensor with a comparison sensor found an average error of 0.0409 with a standard deviation of 0.08023. The results of the measurement of small error errors presented that the DS18B20 sensor can be used properly.

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Erratum: “Preparation, thermoelectric properties, and crystal structure of boron-doped Mg2Si single crystals” [AIP Advances 10, 035115 (2020)]

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AIP Advances 2021年第2期11卷

作者： Kei Hayashi Wataru Saito Kazuya Sugimoto Kenji Ohoyama Kouichi Hayashi Naohisa Happo Masahide Harada Kenichi Oikawa Yasuhiro Inamura Yuzuru Miyazaki 1Department of Applied Physics Graduate School of Engineering Tohoku University Sendai 980-8579 Japan 2Institute of Quantum Beam Science Graduate School of Science and Engineering Ibaraki University Tokai 319-1106 Japan 3Department of Physical Science and Engineering Nagoya Institute of Technology Nagoya 466-8555 Japan 4Frontier Research Institute for Materials Science Nagoya Institute of Technology Nagoya 466-8555 Japan 5Department of Computer and Network Engineering Graduate School of Information Sciences Hiroshima City University Hiroshima 731-3194 Japan 6Materials and Life Science Division J-PARC Center Tokai 319-1195 Japan

Mg/B occupancy (occ.) in Table II of the original article1 was not correct. This erratum presents the corrected version of Table II. The B occ. should be half o

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A Study of Filters Selectivity with Maximally Flat Responses with Respect to Hausdorff Distance 9

A Study of Filters Selectivity with Maximally Flat Responses...

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9th National Conference with International Participation, ELECTRONICA 2018

作者： Apostolov, Peter Stefanov, Alexey Apostolov, Stoyan Department of Communication and Computer Engineering South-West University Ivan Mihaylov str. 66 Blagoevgrad2700 Bulgaria Department Systems and Control Technical University of Sofia 8 Kl. Ohridski Blvd. Bl. 1 Sofia1000 Bulgaria

ISBN: (纸本)9781538658017

This article examines the approximations of the ideal transfer function of a low pass filter with sigmoidal functions using Hausdorff distance. A relation between the filter selectivity and the Hausdorff distance is established. The approximation parameters are defined. Analytical dependencies of transfer functions and their respective Hausdorff distances are derived. An analysis of the results is made. © 2018 IEEE.

关键词： Transfer functions

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Erratum: “Compositional and phase dependence of elastic modulus of crystalline and amorphous Hf1-xZrxO2 thin films” [Appl. Phys. Lett. 118, 102901 (2021)]

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Applied Physics Letters 2021年第12期119卷

作者： Shelby S. Fields David H. Olson Samantha T. Jaszewski Chris M. Fancher Sean W. Smith Diane A. Dickie Giovanni Esteves M. David Henry Paul S. Davids Patrick E. Hopkins Jon F. Ihlefeld 1Department of Materials Science and Engineering University of Virginia Charlottesville Virginia 22904 USA 2Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville Virginia 22904 USA 3Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA 4Sandia National Laboratories Albuquerque New Mexico 87185 USA 5Department of Chemistry University of Virginia Charlottesville Virginia 22904 USA 6Deparment of Physics University of Virginia Charlottesville Virginia 22904 USA 7Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22904 USA

The following Erratum has been prepared by the authors:

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Effect of ZnO nanoparticles on the dielectric properties of polyurethane and epoxy resins

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AIP Conference Proceedings 2021年第1期2411卷

作者： Štefan Hardoň Jozef Kúdelčík Jaroslav Hornak Pavel Trnka Zoltán Adam Tamus Tomasz Koltunowicz 1Department of Physics Faculty of Electrical Engineering and Information Technology University of Žilina Univerzitná 12 010 26 Žilina Slovakia 2Department of Technologies and Measurement Faculty of Electrical Engineering University of West Bohemia Univerzitní 26 301 00 Pilsen Czech Republic 3Budapest University of Technology and Economics Group of High Voltage Technology and Equipment Egry J. utca 18 Budapest H-1111 Hungary 4Department of Electrical Devices and High Voltage Technology Faculty of Electrical Engineering and Computer Science Lublin University of Technology 38A Nadbystrzycka Str. 20-618 Lublin Poland

This study aims to present the influence of Zinc Oxide (ZnO) filler on the dielectric properties of two types of commercial potting compounds. For this purpose, the methods of dielectric spectroscopy were used to measure the changes in dielectric responses of polyurethane and epoxy by 1.0 wt. % ZnO over the frequency and temperature range, respectively. Two representatives of polyurethane and epoxy mixtures (VUKOL 022 and EPOXYLITE 3750 LV), that are commercially used in industry for filling cavities of all kinds (construction of electrical equipment), were used for this investigation. The ZnO nanoparticles in EPOXYLITE 3750 LV caused an increase, and in VUKOL 022 a decrease of the real permittivity compared to the pure matrix. Its decrease was most likely caused by the presence of highly immobile polyurethane chains in the interfacial regions around nanoparticles. The shift of a low relaxation maximum to higher frequencies for nanocomposite base on EPOXYLITE 3750 LV was affected by a smaller local electric field and electric double layers around the nanoparticles.

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Geographic information system (Sig) water distribution Pdam Tirta Daroy Banda Aceh using ArcGIS 10.3 and evaluation of distribution network system

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AIP Conference Proceedings 2020年第1期2291卷

作者： Muhammad Bayu Wibawa Desita Ria Yusian TB Julinawati Suanda 1Department of Informatics Engineering Faculty of Computer Sciece Ubudiyah Indonesia University Jl. Alue Naga Desa Tibang Banda Aceh Indonesia 2School of Business Innovation and Technopreneurship Jalan Kangar-Alor Star 01000 Kangar Perlis Malaysia

Clean water demands in the community that is increasingly rising must be followed by the availability of adequate water. Supply of clean water in the settlements must be provided with the quality that meets the health standards, sufficient quantities, sustainable as well as easy to get and affordable. Efforts in improving the water service especially to customers of PDAM Tirta Daroy in Kutaran and Podiamat, Alue Naga Village Banda Aceh is related with supply and demand method. The research method performed by evaluating the distribution system (supply) and the customers (demand) of the clean water. This research is in the form of data processing of a survey that conducted by adopting ArcGIS 10.3 and Epanet 2.0 software. The purpose of this research is to create a database of distribution network and customer geographically based, evaluation of distribution system and also to analyze the capacity of the distribution towards the distribution of clean water to customers. The results of the study are creation of distribution network and customers of clean water geographically database by adopting software ArcGIS10.3. The evaluation of distribution network installed toward the amount of water demand is evaluated by using software Epanet 2.0. Objects used in this research is 152 junction, 1 reservoir, 173 pipes, and one pump rated flow at the pump curve by 1.64 litre per second tailored to the needs of customers in Kutaran and Podiamat of 1,453 litre/person/second for needs an average of 150 people per litre per day. Pressure on the simulation relatively stable with the smallest value of 2,840 bar, but the level of water supply to customers less than 50% of the amount of water needed by the customer. The flow value of the pipes 150 with a speed of 0.2965 litre per second. On pipes 308 and 206 pipes there is no flow of water because there is no demand at the junction and the upstream end.

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Development and performance test of an innovative solar derived intermittent microwave convective food dryer

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AIP Conference Proceedings 2019年第1期2121卷

作者： Mohammad U. H. Joardder M. H. Masud Shayban Nasif Jakaria Abed Plabon Sagit Hasan Chaklader 1Department of Mechanical Engineering Rajshahi University of Engineering & Technology Rajshahi-6204 Bangladesh 2Department of Computer science and Engineering Varendra University Rajshahi Bangladesh

Drying is one of the oldest food preservation techniques associated simultaneous heat and mass transfer in order to extend the shelf-life of food materials. However, it is an energy intensive process and consumes about 20-25% of the energy used in the food processing industries. Developing of innovative drying system such as intermittent convective microwave (IMC) and utilization of renewable energy like solar energy in drying can be the potential solution of minimizing consumption of conventional energy in drying process. In this study, an innovative solar energy driven IMC dryer has been designed and fabricated. In addition to this, the effectiveness of this dryer over conventional drying process has been performed. Overall, the developed renewable energy based IMC drying shows better performance in energy consumption and quality aspect of the finish food product.

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