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A comparison on the use of Perlin-noise and Gaussian noise based augmentation on X-ray classification of lung cancer patient

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Journal of physics: Conference Series 2021年第1期1951卷

作者： M Haekal RR Septiawan F Haryanto I Arif Department of Physics Faculty of Sciences and Data Analytics Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo - Surabaya Jawa Timur 60111 Indonesia Computer Engineering Study Program School of Electrical Engineering Telkom University Jl. Telekomunikasi No.1 Bandung Jawa Barat 40257 Indonesia Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jl. Ganeca 10 Bandung Jawa Barat 40132 Indonesia

The use of deep learning in medical image classification has become an important study in the past few years. The proper use of this method, however, is still hindered by many problems, one of it being the imbalance of dataset available for training which resulted in small-set database. In this study, the effect of noise-based augmentation on the performance of deep learning based classification will be studied. The noises which were used for the augmentation method were Perlin-noise and Gaussian noise. The modality of medical image used in this study is X-ray. 174 X-ray images (87 cancer, 87 normal) were used in this study and will be classified by using transfer learning from previously trained deep learning architecture. The deep learning architecture used was vgg-19. The images were divided into two groups, 138 (69 cancer, 69 normal) images were used for training phase and 36 (18 cancer, 18 normal) were images used for testing phase. Three deep learning models were used for the classification tasks, the first one was retrained to classify the original images, the second one was retrained by using mix of original images and images with Perlin-noise, and the third one was retrained by using mix of original images and images with Gaussian noise. The results showed that the three models returned similar accuracy of 0.8 which indicate that the use of noise-based augmentation can increase the performance of deep learning in classifying medical images with small set training database.

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Reservoir Characterization using Simultaneous Inversion for Identifying the Sandstone Reservoir of Air Benakat Formation 'IDY' Field in South Sumatra Basin

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IOP Conference Series: Materials Science and engineering 2019年第7期546卷

作者： I D Yuliandari A M Juwono Said Sabbeq Study Program of Engineering Geophysics Department of Physics FMIPA Brawijaya University PT Pertamina UTC

Abstract. This research was conducted using simultaneous inversion seismic method. The inversion method can be used not only to identify reservoirs, but to identify the fluid content in a rock formation. Formation in this study is Air Benakat Formation, in the South Sumatra Basin. Simultaneous inversion has the results in the form of P-impedance, S-impedance, density, P-wave velocity, S-wave velocity, and νp /νs . From the data that have been obtained, that IDY-1 well is considered as a gas saturated sandstone reservoir. Fluid Replacement Modeling (FRM) was also used, in this study, to obtain the detailed information about the presence of gas in the Air Benakat Formation. FRM can simulate the state of the formation if it were in an in situ case condition, and in the gas case condition. From the results of FRM processing, that is for the gas case condition of 90%, it was obtained the νp /νs value of 1.75 to 1.875. While, in the in situ case condition, the ratio was obtained to be 2.0 to 2.2. Based on simultaneous inversion results, the research area is known to have a P-impedance value of 5800 to 6000 (m / s) * (g / cc), an S-impedance of 2000 to 4000 (m / s) * (g / cc), the density of 2.2 to 2.27 g/g/cm3 and the νp /νs ratio of 2.17 to 2.25. To identify the distribution of sandstone reservoirs, a horizontal cross-section map was made, which produced results of the cross section of low impedance and low νp /νs value. This shows that the IDY-1 well is a well-saturated sandstone reservoir.

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Computer Modelling of the Information Properties of Hyper Chaotic Lorenz System and Its Application in Secure Communication System

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Journal of physics: Conference Series 2021年第1期1764卷

作者： Volodymyr Rusyn Mujiarto Mustafa Mamat Firmansyah Azharul W. S. Mada Sanjaya Aceng Sambas Estiyan Dwipriyoko Akhmad Sutoni Yuriy Fedkovych Chernivtsi National University Kotsybynsky str. 2 Chernivtsi 58012 Ukraine. Department of Mechanical Engineering Universitas Muhammadiyah Tasikmalaya Indonesia Faculty of Informatics and Computing Universiti Sultan Zainal Abidin Kuala Terengganu Malaysia Department of Mechanical Engineering Sekolah Tinggi Teknologi Cileungsi Indonesia Department of Physics Universitas Islam Negeri Sunan Gunung Djati Bandung Indonesia Informatics Study Program Universitas Langlangbuana Bandung Indonesia Department of Industrial Engineering Universitas Suryakancana Cianjur Indonesia

This paper presents computer modeling, analysis and research of the hyper-chaotic Lorenz system based on programming interface that has been developed in LabView software environment. This study allows for generating and research of the main information properties of hyper-chaotic Lorenz system, focusing on time distribution of the four chaotic coordinates, phase portraits and Lyapunov exponents. The programming interface demonstrates the algorithm of masking and decrypt of the information carrier.

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Physical Characterization of Injectable Bone Substitute Associated-3D Printed Bone Scaffold for Spinal Tuberculosis

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Journal of physics: Conference Series 2019年第1期1417卷

作者： I F Wardhani R M R Samudra Katherine D Hikmawati Aminatun Biomedical Engineering Study Program Universitas Airlangga Indonesia Physics Department Universitas Airlangga Indonesia

There are two important factors to overcome spinal tuberculosis, i.e. killing and preventing the Mycobacterium tuberculosis to spread, also replacing and reconstructing the damaged bone. This study focused on an innovation to overcome the spinal tuberculosis problem by combining the IBS and 3D printed bone scaffold. This innovation could provide a local drug delivery system along with tissue regeneration and bone reconstruction. In this study, 3D printed bone scaffold which have been injected with IBS were tested its physical characterizations. The bone scaffold was fabricated from Polylactide acid (PLA) filament using FDM method through an ordinary commercial 3D printer. The IBS was synthesized from nanohydroxyapatite, gelatin, streptomycin, and HPMC. The physical characterization performed in this study were porosity test functional group test, and degradation test. From those characterizations, it could be concluded that the IBS associated-3D printed bone scaffold is a potential alternative to overcome spinal tuberculosis.

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Galaxy clusters at z∼1 imaged by ALMA with the Sunyaev-Zel’dovich effect

arXiv

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arXiv 2022年

作者： Kitayama, Tetsu Ueda, Shutaro Okabe, Nobuhiro Akahori, Takuya Hilton, Matt Hughes, John P. Ichinohe, Yuto Kohno, Kotaro Komatsu, Eiichiro Lin, Yen-Ting Miyatake, Hironao Oguri, Masamune Sifón, Cristóbal Takakuwa, Shigehisa Takizawa, Motokazu Tsutsumi, Takahiro van Marrewijk, Joshiwa Wollack, Edward J. Department of Physics Toho University Chiba Funabashi274-8510 Japan No. 1 Section 4 Roosevelt Road Taipei10617 Taiwan Institute of Astronomy National Tsing Hua University Hsinchu30013 Taiwan Department of Physics Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Astrophysical Science Center Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Core Research for Energetic Universe Hiroshima University Department of Physics Hiroshima University 1-3-1 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Physics Program Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Mizusawa VLBI observatory National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Operation Division SKA Observatory Jodrell Bank Lower Withington MacclesfieldSK11 9DL United Kingdom Astrophysics Research Centre University of KwaZulu-Natal Westville Campus Durban4041 South Africa School of Mathematics Statistics & Computer Science University of KwaZulu-Natal Westville Campus Durban4041 South Africa Wits Centre for Astrophysics School of Physics University of the Witwatersrand Private Bag 3 Johannesburg2050 South Africa Department of Physics and Astronomy Rutgers The State University of New Jersey PiscatawayNJ08854-8019 United States Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima-ku Tokyo171-8501 Japan Institute of Astronomy School of Science The University of Tokyo 2-21-1 Osawa Mitaka Tokyo181-0015 Japan Research Center for the Early Universe School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Max-Planck-Institut für Astrophysik Karl-Schwarzschild Str. 1 GarchingD-85741 Germany The University of Tokyo Institutes for Advanced Study The University of Tokyo 5-1-5 Kashiwanoha Chiba277-8583 Japan Nagoya University Nagoya464-8

We present high angular-resolution measurements of the thermal Sunyaev-Zel’dovich effect (SZE) toward two galaxy clusters, RCS J2319+0038 at z = 0.9 and HSC J0947−0119 at z = 1.1, by the Atacama Large Millimeter/submillimeter Array (ALMA) in Band 3. They are supplemented with available Chandra X-ray data, optical data taken by Hyper Suprime-Cam on Subaru, and millimeter-wave SZE data from the Atacama Cosmology Telescope. Taking into account departures from spherical symmetry, we have reconstructed non-parametrically the inner pressure profile of two clusters as well as electron temperature and density profiles for RCS J2319+0038. This is one of the first such measurements for an individual cluster at z >∼ 0.9. We find that the inner pressure profile of both clusters is much shallower than that of local cool-core clusters. Our results consistently suggest that RCS J2319+0038 hosts a weak cool core, where radiative cooling is less significant than in local cool cores. On the other hand, HSC J0947−0119 exhibits an even shallower pressure profile than RCS J2319+0038 and is more likely a non-cool-core cluster. The SZE centroid position is offset by more than 140 h−170kpc from the peaks of galaxy distribution in HSC J0947−0119, suggesting a stronger influence of mergers in this cluster. We conclude that these distant clusters are at a very early stage of developing the cool cores typically found in clusters at lower redshifts. Copyright © 2022, The Authors. All rights reserved.

关键词： Millimeter waves

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Renewable energy education framework for prospective physics teachers

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AIP Conference Proceedings 2022年第1期2468卷

作者： Dindin Nasrudin Agus Setiawan Dadi Rusdiana Liliasari 1Science Education Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No.229 Bandung Indonesia 2Physics Education Study Program UIN Sunan Gunung Djati Bandung Jl. AH. Nasution No. 105 Bandung West Java Indonesia 3Department of Mechanical Engineering Education Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No.229 Bandung Indonesia 4Departement of Physics Education Universitas Pendidikan Indonesia Jl. Dr. Setiabudi No. 229 Bandung Indonesia 5Departement of Chemistry Education Universitas Pendidikan Indonesia Jl. Dr. Setiabudi No. 229 Bandung Indonesia

Teachers play an important role in spreading energy literacy to students at all level of education. Teacher education must be able to provide learning related to renewable energy education. This study aims to describe the framework of renewable energy education for prospective physics teachers. The research method used is Qualitative Document Analysis (QDA), followed up by the Focus Group Discussion (FGD) method. The results show (1) The development of energy education programs at the university level must support the achievement of graduate profiles (2) There are several physics issues or topics at the high school level that are relevant to renewable energy, including climate change, environmentally friendly technology, global warming, and alternative energy (3) There are several global and national policies on renewable energy development that can be accommodated in the program. Renewable energy education framework for prospective teachers must consider four main points: content, context, and learning outcomes (multiple literacy and skills), which are focused on strengthening the profile of graduates. This study recommends the translation of this framework into a more operational and scalable program.

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Slope Stability Analysis for Landslides Natural Disaster Mitigation by Means of Geoelectrical Resistivity Data in Gedangan of South Malang, East Java, Indonesia

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IOP Conference Series: Materials Science and engineering 2019年第2期546卷

作者： Sunaryo Adi Susilo Alamsyah M. Yuwono Wiyono Geophysical Engineering Program Study Departement of Physics Faculty of Mathematics and Natural Sciences University of Brawijaya Malang Indonesia 65145

A study entitled slope stability analysis for landslides natural disaster mitigation by means of geoelectrical resistivity data in Gedangan of South Malang, East Java, Indonesia has been conducted. This study aims to obtain the physical parameters that cause landslides that occur in Gedangan village, Gedangan sub-district, Malang district. The research was conducted using geoelectrical resistivity method by applying a vertical electrical sounding (VES) model and Wenner-Schlumberger configuration. From the data as a result of field data acquisition, processing and interpretation are carried out to obtain landslide parameters. By merging each vertical electrical sounding (VES) point, physical parameters will be obtained as the basis for local landslide analysis. The results of the cross-sectional line A (GED4-GED1-GED2) indicate the presence of an average slope surface or topography that is relatively parallel with the average slope sliding plane which is about 7° whereas line B (GED1-GED3-GED5) is around 15°. The average thickness of the overlying layer in the slip plane both on line A and line B is around 65m. The slope condition of the slip plane (angle and thickness of the layer) indicates an unstable condition. For stable conditions F> = 1.2, the maximum thickness of the cover layer at line A is 54 m while in line B is 8.2 m. For stable conditions F> = 1.5, the maximum thickness of the cover layer for line A is 25.5 m while in line B is 5.85 m. To overcome the landslide, the proposed solution was by doing a reduction/dredging of the cover layer or installation of the bored piles.

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Steady Rayleigh-BénardRayleigh-Bénard convection between stress-free boundaries

arXiv

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arXiv 2020年

作者： Wen, Baole Goluskin, David LeDuc, Matthew Chini, Gregory P. Doering, Charles R. Department of Mathematics University of Michigan Ann ArborMI48109-1043 United States Department of Mathematics & Statistics University of Victoria VictoriaBCV8P 5C2 Canada Department of Physics University of Michigan Ann ArborMI48109-1040 United States Program in Integrated Applied Mathematics University of New Hampshire DurhamNH03824 United States Department of Mechanical Engineering University of New Hampshire DurhamNH03824 United States Center for the Study of Complex Systems University of Michigan Ann ArborMI48109-1042 United States

Steady two-dimensional Rayleigh-Bénard convection between stress-free isothermal boundaries is studied via numerical computations. We explore properties of steady convective rolls with aspect ratios π/5 ⩽ Γ ⩽ 4π, where Γ is the width-to-height ratio for a pair of counter-rotating rolls, over eight orders of magnitude in the Rayleigh number, 103 ⩽ Ra ⩽ 1011, and four orders of magnitude in the Prandtl number, 10−2 ⩽ Pr ⩽ 102. At large Ra where steady rolls are dynamically unstable, the computed rolls display Ra → ∞ asymptotic scaling. In this regime, the Nusselt number Nu that measures heat transport scales as Ra1/3 uniformly in Pr. The prefactor of this scaling depends on Γ and is largest at Γ ≈ 1.9. The Reynolds number Re for large-Ra rolls scales as Pr−1Ra2/3 with a prefactor that is largest at Γ ≈ 4.5. All of these large-Ra features agree quantitatively with the semi-analytical asymptotic solutions constructed by Chini & Cox (2009). Convergence of Nu and Re to their asymptotic scalings occurs more slowly when Pr is larger and when Γ is smaller. Copyright © 2020, The Authors. All rights reserved.

关键词： Prandtl number

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Batik Pemalang Organic Wastewater Composition and Simple Electrocoagulation-Filtration Treatment

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IOP Conference Series: Earth and Environmental Science 2020年第1期448卷

作者： N I Pratiwi S R Sari F Arifan A T Wulandari I Alkian B Mustasjar M B F B Aji Department of Physics Faculty of Science and Mathematics Diponegoro University Indonesia Department of Engineering Architectural Engineering Diponegoro University Indonesia Department of Industrial Chemical Engineering Technology Vocational School Diponegoro University Indonesia Nursing Science Study Program Faculty of Health Sciences Muhammadiyah University Purwokerto Indonesia Department of History Faculty of Humanities Diponegoro University Indonesia

Wastewater produced by batik industry in Cibelok Village, Pemalang that is disposed straight into the sewage will increase the concentration of Biochemical Oxygen Demand (BOD), ammonia (NH3), Chemical Oxygen Demand (COD), chromium (Cr), lead (Pb), watercolour, acidity (pH), and dissolved oxygen (DO). Disposed batik wastewater without treatment will contaminate the environment, mainly its water and soil. The main purpose of this research is to reduce the concentration of Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), ammonia (NH3), chromium (Cr), lead (Pb), watercolour, acidity, and dissolved oxygen (DO) by treating batik Cibelok's waste and not contaminate the surrounding environment. Laboratory test results on batik waste in COD, BOD, DO, ammonia, chromium, lead, colour, and acidity (pH). These results are not in accordance with the 2014 Waste Water Quality Standard Number 5 by the Regulation of the Minister of Environment of the Republic of Indonesia. Alternatives that have been done to treat Cibelok Village's batik waste is to lower dangerous substances concentration through electrocoagulation and filtration. The processes could lower COD level around 57.6%, ammonia 98%, chromium 85%, and BOD 67%. Reducing the concentration of the substance makes the batik waste safer and environmentally friendly when it's finally disposed to the sewage.

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Synthesis and characterization biocomposite collagen-chitosan- glycerol as scaffold for gingival recession therapy

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Journal of International Dental and Medical Research 2017年第1期10卷 118-122页

作者： Rosdiani, Azizah Fresia Widiyanti, Prihartini Rudyarjo, Djoni Izak Biomedical Engineering Study Program Faculty of Science and Technology Universitas Airlangga Indonesia Institute of Tropical Disease Universitas Airlangga Indonesia Physics Study Program Faculty of Science and Technology Universitas Airlangga Indonesia

Gingivitis is considered high prevalence since nearly 75-90% of the world population suffers gingivitis in moderate category. The development of biomaterial in dentistry is divided into synthetic biomaterial and tissue engineering biomaterial includes scaffold engineering. Scaffold biomaterial engineering technique includes the development of tissue engineering and cell. The aim of this study is to determine the best compositions of collagen-chitosan scaffold by adding glycerol, marked by its mechanic characteristic. The synthesis process of the collagen-chitosan-glycerol scaffold is by freeze-dry method to form pores in the scaffold. The characterization of the synthesis was conducted through morphology test, tensile test, toxicity test, swelling test, and biodegradation test. Morphology test results in 50.89 - 143.5 μm pore size and thickness value of 412.0 - 514.9 mm which are appropriate for periodontal applications, especially gingivitis. The tensile test result is 0.46 MPa - 2.36 MPa and the highest value was seen on the variation of 0.46 with 2.36 MPa tensile strength value which is close to the value of UTS for periodontal. While the swelling test results in 1354.04 - 413.9%. Based on the characterization results in this study, the collagen-chitosan scaffold with the addition of glycerol is a potent periodontal scaffold candidate, especially gingivitis.

关键词： Chitosan Collagen Gingivitis Glycerol Scaffold

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