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Hypocenter dimension of 7.5 mw Palu earthquake using fractal approach

IOP Conference Series: Earth and Environmental science 2020年第1期575卷

作者： Syamsurijal Rasimeng Alimuddin Rustadi Rudy Z. Sinambela Idris Mandang Samsul Bakri Ahmad Zaenudin Department of Geophysical Engineering Faculty of Engineering University of Lampung Indonesia Disaster and Mitigation Center Faculty of Engineering University of Lampung Indonesia Study Program of Geophysics Faculty of Mathematics and Natural Science Mulawarman University Indonesia Department of Forestry and The Graduate Program of Environmental Sciences University of Lampung Indonesia

Research on the Palu earthquake in the period of August to October 2018 has been carried out in the Palu Koro Fault (PKF) zone with a hypocenter of 5-20 km. This study aims to determine the fractal dimensions of these earthquakes based on the relationship between logarithmic frequency and earthquake magnitude correlation introduced by Gutenberg-Richter. Statistical correlation between logarithmic frequency and earthquake magnitude was calculated using the inversion approach. Based on the calculation results obtained fractal dimension value of 1.0378, which describes the seismicity pattern at a depth of 5-20 km. It indicates that the earthquakes triggered by the movement in rupture segments which seen as points along the PKF zone.

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The spectrum of city park service scope: case study of Lapangan Puputan Badung and Lapangan Puputan Margarana Denpasar-Bali

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IOP Conference Series: Earth and Environmental science 2019年第1期396卷

作者： N Kohdrata G A M Suartika A A K Krisnandika L S Yusiana I M A Dharmadiatmika Landscape Architecture Study Program Faculty of Agriculture Udayana University Bali Indonesia Architecture Study Program Faculty of Engineering Udayana University Bali Indonesia

This research aims to find the spectrum of a park service scope from two city parks in Denpasar, a densely populated city. The city parks in study are Lapangan Puputan Badung and Lapangan Puputan Margarana as city public facilities of Denpasar – Bali that is said to improve citizen quality of life and environment as well. However, this research focuses to see how city parks in Bali serve their users. This study uses a survey research method. Sample of respondents are chosen using accidental sampling technique with questionnaire as media of data collection. Data series include, users' age, frequency of visit, activities, and domicile. Research findings are analysed spatially and descriptively as well. Result shows that most visitors are young people who spend time mostly for exercising and other recreational activities. It is also interesting to see that both city park users are regular visitors. They visit the parks at least 1 to 2 time per week and spend 1 to 2 hours in there. The parks users mostly come from densely populated areas. That shows the importance of city parks as complement to a city. However, as a city that going to smart city, ICT has not been recognized much. As conclusion, the spectrum of city parks service scope of Denpasar still ranging in traditional functions of public green open space. A city park serves a man-made nature-like place for people to get refresh within an urban landscape setting.

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Changes in electroencephalography complexity of acute Ischemic stroke: A fuzzy approximate entropy analysis

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AIP Conference Proceedings 2020年第1期2314卷

作者： Osmalina Nur Rahma Alfian Pramudita Putra Angga Bagus Prasetyo Riries Rulaningtyas Sastra Kusuma Wijaya 1Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Airlangga University Indonesia 2Department of Physics Faculty of Mathematics & Natural Science University of Indonesia Indonesia

Stroke is one of the leading causes of death in the world. The previous study had shown that EEG (Electroencephalogram) was a promising tool to detect stroke since it is non-invasive and cheap. So, the EEG analysis method needs to be more explored to give an accurate prognosis assessment. Previously, complexity analysis, such as Fuzzy Approximate Entropy (fApEn), had been successfully differentiated between control and patients with Alzheimer's Disease. Thus, this study used fApEn to analyse the changes of electroencephalography complexity in Acute Ischemic Stroke (AIS) during hyperventilation and photic stimulation, which are a general protocol to investigate the abnormality in EEG. Photic stimulation conducted using white light that flashed with frequency 5Hz, 10Hz, and 15Hz consecutively for three minutes and then continued by hyperventilation for three minutes, approximately. This study compared the fApEn value from healthy subjects with AIS patients. The result showed that patient with AIS tended to conduct the lower and higher fApEn value compared to the healthy subject. The lower value of fApEn occurred because of the presence of the slow-waves on the EEG, while the higher fApEn indicated the epileptiform activity during the recording. The increment of the slow-waves and the presence of epileptiform activity could be considered as the characteristic of stroke even though its appearance is uncertain. However, complexity analysis of EEG could be useful in differentiating the healthy subject and patient with stroke or classifying the severity level of the stroke to improve stroke management.

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Analysis of Daylight Distribution on Building Height and Space Depth.

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IOP Conference Series: Materials science and engineering 2019年第1期619卷

作者： Nurul Jamala Annajma Nurul Wika Asniawaty Kusno Department of Architecture Engineering Faculty Hasanuddin University Indonesia Study Program of Architecture Engineering Faculty Hasanuddin University Indonesia

Lighting design is one of the priorities in designing buildings. Natural lighting can reduce energy consumption in buildings. Aesthetic levels are the basis of the planning concept, but need to pay attention to the concept of using natural lighting, in order to realize the energy-efficient building design. The purpose of the study was to determine how the level of illuminance affects the opening area, depth of space and height of the building. Quantitative research method is to analysis statistical data from measurements of illuminance levels in space. The results of the study concluded that the level of illuminance in the meeting room of the Center of Technology building in Hasanuddin University exceeded the illuminance standard. The extent of openings in the building envelope affects the illuminance level in space. Natural light distribution affects the height of the building's floor and the depth of space. Based on this conclusion, it is expected that in designing a building it is necessary to pay attention to the building facade, so that the distribution of natural light is not too high into the building and to avoid negative effects such as glare, high brightness and contrast.

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Hydroxyapatite-gelatin-HPMC composite as injectable bone substitute with alendronate variation for osteoporotic bone

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AIP Conference Proceedings 2020年第1期2314卷

作者： Novita Sari Alfian Pramudita Putra Siswanto Muhammad Fajar Faliasthiunus Pradipta Dyah Hikmawati 1Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia 2Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

The treatment of bone with osteoporosis could be done by filling the bone defect with Injectable Bone Substitute (IBS). IBS could be functioned as drug delivery system by associating a drug inside the IBS, such as alendronate for osteoporosis case. In this study, IBS has been synthesized and characterized with the alendronate variations. The IBS was synthesized by stirring hydroxyapatite and gelatin 5% (w/v) with a ratio of 45:55. The alendronate was added to the solution with composition of 0%, 5%, 10%, 15% and 20%. The mixture was mixed with 2% (w/v) HPMC. FTIR test results indicated the formation of hydroxyapatite-gelatin bonding (Ca2+--COO−) at wavenumber of 1560.54 cm−1. The acidity test result indicated that the sample had a pH of 7 and was able to remain stable. The IBS could be set in 3 hours and 38 minutes when injected to HA substrate and capable of enveloping the surface of HA substrate. The pore size of the substrate decreased from range of 153 to 625.8 µm into 247.4 to 480.8 µm. The XRD test results indicated that degree of crystallinity decreased from 76.81% to 75.13%. The best alendronate composition in IBS was 10% compared to the mass of hydroxyapatite.

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Integration of Satellite-Derived Bathymetry and Sounding Data in Providing Continuous and Detailed Bathymetric Information

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IOP Conference Series: Earth and Environmental science 2020年第1期618卷

作者： Nur Syahirah Hashim Othman Mohd Yusof Wiwin Windupranata Saiful Aman Hj. Sulaiman Centre of Studies for Surveying Science and Geomatics UiTM Shah Alam Malaysia Geodesy and Geomatics Engineering Study Program Faculty of Earth Science and Technology Institute Technology of Bandung Indonesia

A hydrographic survey can be a cumbersome sometimes. The data can be sparse, providing it can be costly, and it took a lot of manpower and time. Space-borne data like multispectral images can be a helpful tool towards hydrographic survey, especially in the shallow water area. The company like EOMAP and TCARTA make use of Satellite-Derived Bathymetry (SDB) as a tool and product. Would it be great if it also can be applied in Malaysia, especially on the low-risk job or survey planning? Enlarging the survey area and providing a continuous and detailed water depth information is the main objective in this research. In order to complement with convenience and cost reduction, the author used Landsat 8 '(free downloadable images)' in this research. Structuring the procedure is the central part of the process involving pre-processing and processing step until the final product obtained. In this research, the author used various kind of bathymetry algorithms such as Single-Band Algorithm (SBA), Green-Band Algorithm (GBA), and Stumpf. Moreover, the author also uses Principal Component Analysis (PCA) tool from ArcMap and Spear Relative Water Depth: Log-Ratio Transform tool from ENVI to derived bathymetry. All of this bathymetry algorithm gives out a different concept with a different statistical approach. The final result then will be compared and evaluated with Single-Beam Echosounder data (ground truth).

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Synthesis and characterization of acrylic resin with ultra high molecular weight polyethylene (UHMWPE) addition as dental prosthetic base

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AIP Conference Proceedings 2020年第1期2314卷

作者： Prihartini Widiyanti Siswanto Ika Fauziyatus Silfiana 1Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia 2Departement of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

Acrylic based resins are frequently used in daily dental practice. The most common use of the materials includes denture bases and denture liners. Dental prosthetic base is part of a denture that rests on the supporting network elements where the artificial tooth is placed. The problem with the denture base is the high incidence of dental base fracture due to masticatory pressure. This study is aimed to obtain the best properties of fiber acrylic resin as a dental prosthetic base by adding Ultra High Molecular Weight Polyethylene (UHMWPE). UHMWPE fiber length variation used was 0 mm, 2 mm, 4 mm, 6 mm, and 8 mm with a width of 2 mm fiber. The characterization test was porosity, density, compressive strength and hardness. The porosity test are showed that its best value was 1.695%, while the highest density test was 1.177 g/cm3. The highest compressive strength test was at 67.615 MPa and the highest hardness was 17.1 kgf/mm2. Based on all results,they are showed that the variation of UHMWPE fiber length with a width of 2 mm affected the physical and mechanical properties of dental prosthetic base materials.

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Calcium release and physical properties of modified carbonate apatite cement as pulp capping agent in dental application

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Biomaterials Research 2018年第1期22卷 1-6页

作者： Zakaria, Myrna Nurlatifah Cahyanto, Arief El-Ghannam, Ahmed Department of Endodontology and Operative Dentistry Program Study of Dentistry Faculty of Medicine Universitas Jenderal Achmad Yani Cimahi Indonesia Department of Dental Materials Science and Technology Faculty of Dentistry Universitas Padjadjaran Sumedang-Jatinangor Indonesia Department of Mechanical Engineering and Engineering Science The University of North Carolina at Charlotte Charlotte NC United States

Background: Carbonate apatite (CO3Ap) and silica-calcium phosphate composite (SCPC) are bone substitutes with good prospect for dental application. SCPC creates a hydroxyapatite surface layer and stimulate bone cell f... 详细信息

Background: Carbonate apatite (CO₃Ap) and silica-calcium phosphate composite (SCPC) are bone substitutes with good prospect for dental application. SCPC creates a hydroxyapatite surface layer and stimulate bone cell function while, CO₃Ap induce apatite crystal formation with good adaptation providing good seal between cement and the bone. Together, these materials will add favorable properties as a pulp capping material to stimulate mineral barrier and maintain pulp vitality. The aim of this study is to investigate modification of CO₃Ap cement combined with SCPC, later term as CO₃Ap-SCPC cement (CAS) in means of its chemical (Calcium release) and physical properties (setting time, DTS and pH value). Methods: The study consist of three groups;group 1 (100% calcium hydroxide, group 2 CO₃Ap (60% DCPA: 40% vaterite, and group 3 CAS (60% DCPA: 20% vaterite: 20% SCPC. Distilled water was employed as a solution for group 1, and 0.2 mol/L Na₃PO₄ used for group 2 and group 3. Samples were evaluated with respect to important properties for pulp capping application such as pH, setting time, mechanical strength and calcium release evaluation. Results: The fastest setting time was in CO₃Ap cement group without SCPC, while the addition of 20% SCPC slightly increase the pH value but did not improved the cement mechanical strength, however, the mechanical strength of both CO₃Ap groups were significantly higher than calcium hydroxide. All three groups released calcium ions and had alkaline pH. Highest pH level, as well as calcium released level, was in the control group. Conclusion: The CAS cement had good mechanical and acceptable chemical properties for pulp capping application compared to calcium hydroxide as a gold standard. However, improvements and in vivo studies are to be carried out with the further development of this material. © The Author(s).

关键词： Carbonate apatite CO3Ap-SCPC cement Pulp capping Silica-calcium phosphate composite

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The effect of polystyrene addition in characteristics of zinc oxide eugenol dental cement

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AIP Conference Proceedings 2020年第1期2314卷

作者： Prihartini Widiyanti Siswanto Betanty Prasetya Sadewi 1Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia 2Departement of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

Zinc oxide-eugenol cements are easier to be tolerated by tissue than other dental materials. They could relieve pain, antibacterial and antiseptic. The cements provide better sealing properties than other type of cements. They used as temporary filling materials, gingival dressings due to their poor mechanic properties. In order to increase the mechanical properties and to reduce solubility of this cement,the additive must be added in the composition of this cement. This study used dental materials, namely zinc oxide eugenol dental cement and polystyrene additives. The sample used in this study was made of the dental cement composition of zinc oxide eugenol cement without the addition of additives polystyrene and with the addition of 2%, 5% and 10% variations of *** results of the tensile strength test and compressive strength test are showed that the larger the percentage of polystyrene additives added to the samples, the greater the two parameters of mechanical strength. This result was in accordance with microstructure characteristic using Scanning Electron Microscopy (SEM) which showed that the greater the percentage of the polystyrene additive, the more subtle the connection between the cement and the teeth.

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Nonlocality in photonic materials and metamaterials: roadmap

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Optical Materials Express 2025年第7期15卷 1544-1709页

作者： Francesco Monticone N Asger Mortensen Antonio I Fernández-Domínguez Yu Luo Xuezhi Zheng Christos Tserkezis Jacob B Khurgin Tigran V Shahbazyan André J Chaves Nuno M R Peres Gino Wegner Kurt Busch Huatian Hu Fabio Della Sala Pu Zhang Cristian Ciracì Javier Aizpurua Antton Babaze Andrei G Borisov Xue-Wen Chen Thomas Christensen Wei Yan Yi Yang Ulrich Hohenester Lorenz Huber Martijn Wubs Simone De Liberato P A D Gonçalves F Javier García de Abajo Ortwin Hess Illya Tarasenko Joel D Cox Line Jelver Eduardo J C Dias Miguel Sánchez Sánchez Dionisios Margetis Guillermo Gómez-Santos Igor M Vasilevskiy Tobias Stauber Sergei Tretyakov Constantin Simovski Samaneh Pakniyat J Sebastián Gómez-Díaz Igor V Bondarev Svend-Age Biehs Alexra Boltasseva Vladimir M Shalaev Alexey V Krasavin Anatoly V Zayats Andrea Alù Jung-Hwan Song Mark L Brongersma Uriel Levy Olivia Y Long Cheng Guo Shanhui Fan Sergey I Bozhevolnyi Adam Overvig Filipa R Prudêncio Mário G Silveirinha S Ali Hassani Gangaraj Christos Argyropoulos Paloma A Huidobro Emanuele Galiffi Fan Yang John B Pendry David A B Miller School of Electrical and Computer Engineering Cornell University Ithaca New York 14853 USA POLIMA—Center for Polariton-driven Light-Matter Interactions University of Southern Denmark Campusvej 55 DK-5230 Odense M Denmark D-IAS—Danish Institute for Advanced Study University of Southern Denmark Campusvej 55 DK-5230 Odense M Denmark Departamento de Física Teórica de la Materia Condensada Universidad Autónoma de Madrid E-28049 Madrid Spain Condensed Matter Physics Center (IFIMAC) Universidad Autónoma de Madrid E-28049 Madrid Spain School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China WaveCoRE Division Department of Electrical Engineering KU Leuven Leuven B-3001 Belgium Department of Electrical and Computer Engineering Johns Hopkins University Baltimore Maryland 21218 USA Department of Physics Jackson State University Jackson Mississippi 39217 USA Department of Physics Aeronautics Institute of Technology 12228-900 So Jos dos Campos SP Brazil Centro de Física (CF-UM-UP) and Departamento de Física Universidade do Minho P-4710-057 Braga Portugal International Iberian Nanotechnology Laboratory (INL) Av Mestre José Veiga 4715-330 Braga Portugal Max-Born-Institut 12489 Berlin Germany Humboldt-Universität zu Berlin Institut für Physik AG Theoretische Optik and Photonik 12489 Berlin Germany Center for Biomolecular Nanotechnologies Istituto Italiano di Tecnologia Via Barsanti 14 73010 Arnesano Italy Institute for Microelectronics and Microsystems (CNR-IMM) Via Monteroni Campus Unisalento 73100 Lecce Italy School of Physics Huazhong University of Science and Technology Luoyu Road 1037 Wuhan 430074 China Donostia International Physics Center DIPC 20018 Donostia-San Sebastián Spain Ikerbasque Basque Foundation fo

Photonic technologies continue to drive the quest for new optical materials with unprecedented responses. A major frontier in this field is the exploration of nonlocal (spatially dispersive) materials, going beyond the local, wavevector-independent assumption traditionally adopted in optical material modeling. The growing interest in plasmonic, polaritonic, and quantum materials has revealed naturally occurring nonlocalities, emphasizing the need for more accurate models to predict and design their optical responses. This has major implications also for topological, nonreciprocal, and time-varying systems based on these material platforms. Beyond natural materials, artificially structured materials—metamaterials and metasurfaces—can provide even stronger and engineered nonlocal effects, emerging from long-range interactions or multipolar effects. This is a rapidly expanding area in the field of photonic metamaterials, with open frontiers yet to be explored. In metasurfaces, in particular, nonlocality engineering has emerged as a powerful tool for designing strongly wavevector-dependent responses, enabling enhanced wavefront control, spatial compression, multifunctional devices, and wave-based computing. Furthermore, nonlocality and related concepts play a critical role in defining the ultimate limits of what is possible in optics, photonics, and wave physics. This Roadmap aims to survey the most exciting developments in nonlocal photonic materials and metamaterials, highlight new opportunities and open challenges, and chart new pathways that will drive this emerging field forward—toward new scientific discoveries and technological *** by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License . Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

关键词： Chemical elements Localized surface plasmon resonance Material properties Near field scanning optical microscopy Optical materials Thin films

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