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Utilization of waste of chicken feathers and waste of cardboard as the material of acoustic panel maker

IOP Conference Series: Earth and Environmental Science 2018年第1期126卷

作者： Ansarullah Ramli Rahim Asniawaty Kusno Baharuddin Nurul Jamala Graduate Student Architecture Program Faculty of Engineering Universitas Hasanuddin Building Science and Technology Laboratory Department of Architecture Faculty of Engineering Universitas Hasanuddin

In The existence of chicken fur is a waste of chicken slaughterhouse Which is produced daily and still not widely used. Likewise cartons everywhere we can see its being because its function is so great in all human activities In the fulfillment of the need for storage and packaging of goods for human purposes such as electronic goods, commodity, Because it has a relatively large thickness of paper. Several studies have proven that Quill and cardboard can be used for acoustic materials. This study aims to identify the potential of chicken fur and cardboard to be created as panel materials Which acts as an acoustic panel. . This study uses an experimental method by combining two materials, Including waste Quill and carton waste by performing several stages in the formation of panels, Such as the selection of chicken fur material and cardboard cleaning process, drying process, enumeration process, panel modeling process. The result of this research is acoustic panel model with size 20x20cm2 with thickness 9 and 18 mm, The study also produced a Ø9,8 cm diameter-shaped panel model with 1.5cm, 2.5cm, and 5cm thickness for use in testing absorption coefficients using impedance tubes.

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Influence of application of accurate airflow resistance on openings with different configurations of shading devices on the building thermal performance 33

Influence of application of accurate airflow resistance on o...

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33rd International on Passive and Low Energy architecture Conference: Design to Thrive, PLEA 2017

作者： Maciel, Liliane Oliveira, Matheus Barbosa, Sabrina Carlo, Joyce Tibiriçá, Álvaro Graduate Architecture and Urban Planning Program Federal University of Viçosa Viçosa Brazil Educational Institute Santo Agostinho Montes Claros Brazil Department of Production and Mechanical Engineering Federal University of Viçosa Viçosa Brazil

ISBN: (纸本)9780992895754

With large cooling potentials, natural ventilation is the main passive technique applied to tropical buildings. In computational simulations studies, the discharge coefficient (Cd) is required as a parameter to characterize the resistance the opening imposes to the airflow. As shape and angle of shading devices influence the airflow through the openings, accurate setting of Cd has a significant impact on the characterization of the cooling phenomena. This study investigates the effect of accurate Cd of five different configurations of shading devices. Using a classroom as a generic case, corrected Cd obtained from CFD models were used to simulations on the software EnergyPlus identifying airflow levels and periods of thermal comfort under the climate conditions of São Paulo. Results indicate that using 0.6 as a Cd value in the simulations is adequate for openings with shading devices that has a lower level of obstruction on the façade. However, for geometries with several slats and low angles, Cd values can be as low as 0.34. In this case, the airflow through the room decreases in average 15% in relation to the model that used usual Cd. The outcomes contribute to a more precise prediction of natural ventilation of buildings with shaded openings. © Copyright 2017 NCEUB.

关键词： Tropical buildings

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Molecular dynamics study of mechanical properties of monolayer graphene sheet 44

Molecular dynamics study of mechanical properties of monolay...

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44th European Physical Society Conference on Plasma Physics, EPS 2017

作者： Dela Cruz, C.J.M. Vasquez, M.R. Bo-ot, L.M.T. Energy Engineering Graduate Program College of Engineering University of the Philippines Quezon City Philippines Deparment of Mining Metallurgical and Materials Engineering College of Engineering University of the Philippines Quezon City Philippines College of Architecture University of the Philippines Quezon City Philippines

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Indoor temperature variation with different roof materials and natural ventilation 33

Indoor temperature variation with different roof materials a...

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33rd International on Passive and Low Energy architecture Conference: Design to Thrive, PLEA 2017

作者： Drach, Patricia R. Architecture and Urbanism Department School of Industrial Design State University of the Rio de Janeiro - DAU/ESDI/UERJ Rio de Janeiro Brazil Post-Graduate Program in Urbanism School of Architecture and Urbanism Federal University of Rio de Janeiro PROURB/FAU/UFERJ Rio de Janeiro Brazil Urban Engineering Program Federal University of Rio de Janeiro PEU/POLI/UFRJ Rio de Janeiro Brazil

ISBN: (纸本)9780992895754

This work involves experiments using subroutines developed by the author in Fortran language to calculate heat and mass transfer, and ventilation. The simulations were done to check the results of the influence of the application of different materials on a flat roof associated to passive ventilation. The target of this paper is to evaluate the use of subroutines developed to show air temperature changes, the heat transfer through a flat roof and the ventilation on a small prototype. The experiments conducted involved predictable results and that is exactly why they were suitable to check the performance of the subroutine. It is relevant to mention that the heat transfer through a flat roof was checked including a solar gain factor, which changes during the simulation using the subroutines, according to the hour of day (hourly from 7a.m. to 5p.m). The analysis started by solving the air-circulation problem to determine the wind fields, using a mixed stabilized finite element method, like Petrov-Galerkin, applied to the full Navier-Stokes equations. The thermal problem is analyzed through the SUPG - Streamline Up-wind Petrov-Galerkin stabilized finite element method. Computational simulations allow for testing low cost operational interferences before implementing a project. © Copyright 2017 NCEUB.

关键词： Ventilation

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Plant diversity in agroforestry system and its traditional use by three different ethnics in Central Sulawesi Indonesia

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IOP Conference Series: Earth and Environmental Science 2021年第1期886卷

作者： Ramadanil Pitopang Agung Tri Atmoko Yusran Wardah Sudarkam R. Mertosono Panji Anom Ramawangsa Department of Biology Faculty of Mathemathics & Natural Sciences Tadulako University Jl. Sukarno Hatta Km 9 Kampus Bumi Tadulako Tondo Palu Indonesia Post Graduate Program Tadulako University Jl. Sukarno Hatta Km 9 Kampus Bumi Tadulako Tondo Palu Indonesia Department of Forest Management Faculty of Forestry Tadulako University Jl. Sukarno Hatta Km 9 Kampus Bumi Tadulako Tondo Palu Indonesia Faculty of Teachers' Training and Education Tadulako University Faculty of Agriculture Tadulako University Kampus Bumi Tadulako Tondo Sukarno Hatta Street Km 10 Tondo Palu Indonesia Department of Architecture Faculty of Engineering University of Bengkulu Jl. W.R Supratman Kandang Limun Bengkulu 38371 Sumatera Indonesia

This paper discusses the result of the study on plant diversity in the Agroforestry system and its traditional uses by the three different ethnicities in Banggai Regency, Central Sulawesi, Indonesia. The basic data of traditional plants used by each of the ethnic groups in the research site wer collected through an in-depth interview initiated by an informed consent using a questionnaire containing open-ended questions—fifty (50) respondents from each of the ethnic groups representing different jobs. The result showed that the highest number of plant species was found in research site B, bu the highest number of individual plants was noted in research site A. The highest Important Value Index (IVI) of tree, poles, sapling a,nd seedling level of plant species differed among the three research sites. When viewed from the perspective of traditional plant use, the highest ICS of plants utilized by the three ethnics was 'coconut' (Cocos Nucifera L). The number ofthe utiliplantslant was different among the three ethnics. Tao Taa Wana people have utilized about 43 plant species, 27 of which were used for medicines, 20 for foods, 2 for natural dying, 18 for fuels, 6 for building materials, 5 for ritraditionaluonal ceremonies. In research site B (Singkoyo), 52 plant spe es have been extensively used by Javanese people for a wide range of culturally related activities, 28 species were used as medicine, 32 for food, 17 for fuel, 7 for building materials, and 10 for ornaments. Unlikely, in site C (Mentawa, 39 plant species were used traditionally by Balinese people; 18 of which were used for medicines, 18 for food, and 13 for ritual ceremonies).

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Relative air temperature analysis external building on Gowa Campus

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IOP Conference Series: Earth and Environmental Science 2018年第1期126卷

作者： Tayeb Mustamin Ramli Rahim Baharuddin Nurul Jamala Asniawaty Kusno Graduate Student Architecture Program Faculty of Engineering Universitas Hasanuddin Makassar Indonesia Building Science and Technology Laboratory Department of Architecture Faculty of Engineering Universitas Hasanuddin Makassar Indonesia

This study aims to data analyze the relative temperature and humidity of the air outside the building. Data retrieval taken from weather monitoring device (monitoring) Vaisala, RTU (Remote Terminal Unit), Which is part of the AWS (Automatic Weather Stations) Then Processing data processed and analyzed by using Microsoft Excel program in the form of graph / picture fluctuation Which shows the average value, standard deviation, maximum value, and minimum value. Results of data processing then grouped in the form: Daily, and monthly, based on time intervals every 30 minutes. The results showed Outside air temperatures in March, April, May and September 2016 Which entered in the thermal comfort zone according to SNI standard (Indonesian National Standard) only at 06.00-10.00. In late March to early April Thermal comfort zone also occurs at 15.30-18.00. The highest maximum air temperature occurred in September 2016 at 11.01-11.30 And the lowest minimum value in September 2016, time 6:00 to 6:30. The result of the next analysis shows the level of data conformity with thermal comfort zone based on SNI (Indonesian National Standard) every month.

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Phase change materials (PCM) for building envelope applications: A review of numerical models

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AIP Conference Proceedings 2019年第1期2191卷

作者： José Henrique Nazzi Ehms Rejane De Cesaro Oliveski Luiz Alberto Oliveira Rocha Cesare Biserni Massimo Garai 1Mechanical Engineering Graduate Program Universidade do Vale do Rio dos Sinos 93022-750 São Leopoldo Brazil 2Department of Industrial Engineering (DIN) School of Engineering and Architecture Alma Mater Studiorum - University of Bologna Viale Risorgimento 2 40136 Bologna Italy

Phase Change Materials (PCM) present a great potential for energy efficiency gains in thermal systems, e.g. by storing solar energy in buildings or heat loads in industrial processes. This is because a great amount of energy can be stored per mass unit within a small temperature range. Significant applications of this peculiar characteristic of PCM regard the effective adoption of macro-encapsulated PCM into building envelopes. Several studies on this topic tend to be limited to a sort of “material selections” on PCM and a lack of systematic analysis has consequently emerged. In order to guarantee an effective use coupled with economic feasibility, a deep understanding of the phase transition phenomenon is needed. The study of PCM using computational fluid dynamics (CFD) is documented in several works, in accordance with the current trend of CFD to become increasingly widespread. Numerical studies on solidification and melting processes use a combination of formulations to describe the physical phenomena related to such processes, mainly the latent heat and the velocity transition between the liquid and the solid phases. The methods used to describe the latent heat are divided in three main groups: (i) source term methods (E-STM), (ii) temperature transforming models (E-TTM) and (iii) enthalpy methods (E-EM). The description of the velocity transition is in turn divided in three main groups: (i) switch-off method (SOM), (ii) source term method (STM) and (iii) variable viscosity method (VVM). In this context, the main objective of the present paper is to review the numerical approaches used to describe solidification and melting processes.

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Sustainable Revitalization in Cultural Heritage Kampong Kauman Surakarta Supported by Spatial Analysis

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IOP Conference Series: Earth and Environmental Science 2018年第1期123卷

作者： M Musyawaroh T S Pitana M Masykuri Nandariyah Doctoral Candidate Study Program of Environmental Science Graduate School of Universitas Sebelas Maret Surakarta Indonesia Study Program of Architecture Faculty of Engineering Universitas Sebelas Maret Surakarta Indonesia Study Program of Environmental Science Graduate School of Universitas Sebelas Maret Surakarta Indonesia Study Program of Agronomy Graduate School of Universitas Sebelas Maret Surakarta Indonesia

Revitalization is a much-needed for a historic kampong as a settlement, place of business, and as tourist destinations. The research was conducted in Kauman as one of the cultural heritage kampong which was formerly as a residence of abdidalemulamaKeraton who also work as batik entrepreneurs. This study aims to formulate a sustainable revitalization step based on the character of the area and the building. Aspects of sustainable revitalization that analyzed are the physical and non-physical condition of the environment. This research is an applied research with qualitative rationalistic approach supported with spatial distribution analysis through satellite imagery and Arch-GIS. The results revealed that sustainable revitalization for Kaumancan be done through: 1) Physical condition of the environment consists of land and building use, green open space, recreational park and sport activities, streets, drainage network, sewer network, the garbage disposal network; 2) Non-physical of the environment consists of economy, heritage socio-cultural, and the engagement of relevant stakeholders. The difference of this study with others is, this study is a continuation of the Kauman revitalization assistance program which involves community participation to produce a more appropriate solution for the problem of kampong.

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Elastic-plastic beam-column fem model with fiber elements evaluating shear deformation

Journal of Structural and Construction Engineering

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Journal of Structural and Construction Engineering 2017年第737期82卷 1035-1045页

作者： Wang, Dan Hayashi, Yoshiki Muramoto, Makoto Morisako, Kiyotaka Graduate School of Science and Technology Doctoral Program of Design Science Kyoto Institute of Technology Japan Maeda Corporation Japan Faculty of Design and Architecture Kyoto Institute of Technology Japan

This paper proposes a new beam-column FEM which consists of several fiber elements considering shear deformation. The shear strain in each fiber element is assumed by shear deformation angle and distribution of shear strain at the elastic state. The formulation is accomplished based on the incremental perturbation method. Normal stress-strain relation and shear stress-strain relation in the fiber element are supposed here to obey each different consistent law independently. The verification of the proposed numerical method named FERTs-P is carried out for the problem of elastic beam, elastic-plastic beam. The simulation of the steel beam experiment and the frame experiment with a shear panel are done by the FERTs-P. The ratios of shear deformation to bending deformation in elastic beams are almost coincident with theoretical values. The numerical results by the FERTs-P are relatively good predictions for load-deflection curves of beams and frame yielding at shear. In spite of bold modeling, this numerical method may be expected considerably. © 2017 Architectural Institute of Japan. All rights reserved.

关键词： Finite element method

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Search for Gamma-Ray Spectral Lines from Dark Matter Annihilation up to 100 TeV toward the Galactic Center with MAGIC

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Physical Review Letters 2023年第6期130卷 061002-061002页

作者： H. Abe S. Abe V. A. Acciari T. Aniello S. Ansoldi L. A. Antonelli A. Arbet Engels C. Arcaro M. Artero K. Asano D. Baack A. Babić A. Baquero U. Barres de Almeida J. A. Barrio I. Batković J. Baxter J. Becerra González W. Bednarek E. Bernardini M. Bernardos A. Berti J. Besenrieder W. Bhattacharyya C. Bigongiari A. Biland O. Blanch G. Bonnoli Ž. Bošnjak I. Burelli G. Busetto R. Carosi M. Carretero-Castrillo G. Ceribella Y. Chai A. Chilingarian S. Cikota E. Colombo J. L. Contreras J. Cortina S. Covino G. D’Amico V. D’Elia P. Da Vela F. Dazzi A. De Angelis B. De Lotto A. Del Popolo M. Delfino J. Delgado C. Delgado Mendez D. Depaoli F. Di Pierro L. Di Venere E. Do Souto Espiñeira D. Dominis Prester A. Donini D. Dorner M. Doro D. Elsaesser G. Emery V. Fallah Ramazani L. Fariña A. Fattorini L. Font C. Fruck S. Fukami Y. Fukazawa R. J. García López M. Garczarczyk S. Gasparyan M. Gaug J. G. Giesbrecht Paiva N. Giglietto F. Giordano P. Gliwny N. Godinović J. G. Green D. Green D. Hadasch A. Hahn T. Hassan L. Heckmann J. Herrera D. Hrupec M. Hütten R. Imazawa T. Inada R. Iotov K. Ishio I. Jiménez Martínez J. Jormanainen D. Kerszberg Y. Kobayashi H. Kubo J. Kushida A. Lamastra D. Lelas F. Leone E. Lindfors L. Linhoff S. Lombardi F. Longo R. López-Coto M. López-Moya A. López-Oramas S. Loporchio A. Lorini E. Lyard B. Machado de Oliveira Fraga P. Majumdar M. Makariev G. Maneva N. Mang M. Manganaro S. Mangano K. Mannheim M. Mariotti M. Martínez A. Mas Aguilar D. Mazin S. Menchiari S. Mender S. Mićanović D. Miceli T. Miener J. M. Miranda R. Mirzoyan E. Molina H. A. Mondal A. Moralejo D. Morcuende V. Moreno T. Nakamori C. Nanci L. Nava V. Neustroev M. Nievas Rosillo C. Nigro K. Nilsson K. Nishijima T. Njoh Ekoume K. Noda S. Nozaki Y. Ohtani T. Oka J. Otero-Santos S. Paiano M. Palatiello D. Paneque R. Paoletti J. M. Paredes L. Pavletić M. Persic M. Pihet F. Podobnik P. G. Prada Moroni E. Prandini G. Principe C. Priyadarshi I. Puljak W. Rhode M. Ribó J. Rico C. Righi A. Rugliancich N. Sahakyan T. Saito S. Sakurai K. Satalecka F. G. Sat Japanese MAGIC Group: Institute for Cosmic Ray Research (ICRR) The University of Tokyo Kashiwa 277-8582 Chiba Japan Instituto de Astrofísica de Canarias and Departamento de Astrofísica Universidad de La Laguna E-38200 La Laguna Tenerife Spain National Institute for Astrophysics (INAF) I-00136 Rome Italy Università di Udine and INFN Trieste I-33100 Udine Italy Max-Planck-Institut für Physik D-80805 München Germany Università di Padova and INFN I-35131 Padova Italy Institut de Física d’Altes Energies (IFAE) The Barcelona Institute of Science and Technology (BIST) E-08193 Bellaterra (Barcelona) Spain Technische Universität Dortmund D-44221 Dortmund Germany Croatian MAGIC Group: University of Zagreb Faculty of Electrical Engineering and Computing (FER) 10000 Zagreb Croatia IPARCOS Institute and EMFTEL Department Universidad Complutense de Madrid E-28040 Madrid Spain Centro Brasileiro de Pesquisas Físicas (CBPF) 22290-180 URCA Rio de Janeiro (RJ) Brazil University of Lodz Faculty of Physics and Applied Informatics Department of Astrophysics 90-236 Lodz Poland Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n 18008 Granada Spain Deutsches Elektronen-Synchrotron (DESY) D-15738 Zeuthen Germany ETH Zürich CH-8093 Zürich Switzerland Università di Pisa and INFN Pisa I-56126 Pisa Italy Universitat de Barcelona ICCUB IEEC-UB E-08028 Barcelona Spain Armenian MAGIC Group: A. Alikhanyan National Science Laboratory 0036 Yerevan Armenia Centro de Investigaciones Energéticas Medioambientales y Tecnológicas E-28040 Madrid Spain Department for Physics and Technology University of Bergen Norway INFN MAGIC Group: INFN Sezione di Catania and Dipartimento di Fisica e Astronomia University of Catania I-95123 Catania Italy INFN MAGIC Group: INFN Sezione di Torino and Università degli Studi di Torino I-10125 Torino Italy INFN MAGIC Group: INFN Sezione di Bari and Dipartimento Interateneo di Fisica dell’Università e del Politecnico di Bari I-70125 Bari Italy

Linelike features in TeV γ rays constitute a “smoking gun” for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with ground-based Cherenkov telescopes enables the search for TeV spectral features in immediate association with a dense dark matter reservoir at a sensitivity out of reach for satellite γ-ray detectors, and direct detection and collider experiments. We report on 223 hours of observations of the Galactic Center region with the MAGIC stereoscopic telescope system reaching γ-ray energies up to 100 TeV. We improved the sensitivity to spectral lines at high energies using large-zenith-angle observations and a novel background modeling method within a maximum-likelihood analysis in the energy domain. No linelike spectral feature is found in our analysis. Therefore, we constrain the cross section for dark matter annihilation into two photons to ⟨σv⟩≲5×10−28 cm3 s−1 at 1 TeV and ⟨σv⟩≲1×10−25 cm3 s−1 at 100 TeV, achieving the best limits to date for a dark matter mass above 20 TeV and a cuspy dark matter profile at the Galactic Center. Finally, we use the derived limits for both cuspy and cored dark matter profiles to constrain supersymmetric wino models.

关键词： Dark matter Gamma ray astronomy Particle dark matter Milky Way Cosmic ray & astroparticle detectors Cosmic rays & astroparticles Electromagnetic radiation astronomy Telescopes

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