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Data Descriptor: Computed tomography data collection of the complete human mandible and valid clinical ground truth models

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arXiv 2019年

作者： Wallner, Jürgen Mischak, Irene Egger, Jan Department of Oral and Maxillofacial Surgery Medical University of Graz Auenbruggerplatz 5/1 Graz8036 Austria Computer Algorithms for Medicine Laboratory Graz Austria University Clinic of Dental Medicine and Oral Health Medical University of Graz Billrothgasse 4 Graz8010 Austria Institute for Computer Graphics and Vision Graz University of Technology Inffeldgasse 16c/II Graz8010 Austria

Image-based algorithmic software segmentation is an increasingly important topic in many medical fields. Algorithmic segmentation is used for medical three-dimensional visualization, diagnosis or treatment support, especially in complex medical cases. However, accessible medical databases are limited, and valid medical ground truth databases for the evaluation of algorithms are rare and usually comprise only a few images. Inaccuracy or invalidity of medical ground truth data and image-based artefacts also limit the creation of such databases, which is especially relevant for CT data sets of the maxillomandibular complex. This contribution provides a unique and accessible data set of the complete mandible, including 20 valid ground truth segmentation models originating from 10 CT scans from clinical practice without artefacts or faulty slices. From each CT scan, two 3D ground truth models were created by clinical experts through independent manual slice-by-slice segmentation, and the models were statistically compared to prove their validity. These data could be used to conduct serial image studies of the human mandible, evaluating segmentation algorithms and developing adequate image tools. Copyright © 2019, The Authors. All rights reserved.

关键词： computerized tomography

Authenticating Users Through Fine-Grained Channel Information

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Authenticating Users Through Fine-Grained Channel Informatio...

作者： Liu, Hongbo Wang, Yan Liu, Jian Yang, Jie Chen, Yingying Poor, H. Vincent Department of Computer Information and Graphics Technology Indiana University-Purdue University Indianapolis IndianapolisIN46222 United States Department of Electrical and Computer Engineering Stevens Institute of Technology HobokenNJ07030 United States Department of Computer Science Florida State University TallahasseeFL32306 United States Department of Electrical Engineering Princeton University PrincetonNJ08544 United States

User authentication is the critical first step in detecting identity-based attacks and preventing subsequent malicious attacks. However, the increasingly dynamic mobile environments make it harder to always apply cryptographic-based methods for user authentication due to their infrastructural and key management overhead. Exploiting non-cryptographic based techniques grounded on physical layer properties to perform user authentication appears promising. In this work, the use of channel state information (CSI), which is available from off-the-shelf WiFi devices, to perform fine-grained user authentication is explored. Particularly, a user-authentication framework that can work with both stationary and mobile users is proposed. When the user is stationary, the proposed framework builds a user profile for user authentication that is resilient to the presence of a spoofer. The proposed machine learning based user-authentication techniques can distinguish between two users even when they possess similar signal fingerprints and detect the existence of a spoofer. When the user is mobile, it is proposed to detect the presence of a spoofer by examining the temporal correlation of CSI measurements. Both office building and apartment environments show that the proposed framework can filter out signal outliers and achieve higher authentication accuracy compared with existing approaches using received signal strength (RSS). © 2017 IEEE.

关键词： Channel state information

Results of the ontology alignment evaluation initiative 2020 15

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Results of the ontology alignment evaluation initiative 2020

15th International Workshop on Ontology Matching, OM 2020

作者： Nikooie Pour, Mina Abd Algergawy, Alsayed Amini, Reihaneh Faria, Daniel Fundulaki, Irini Harrow, Ian Hertling, Sven Jiménez-Ruiz, Ernesto Jonquet, Clement Karam, Naouel Khiat, Abderrahmane Laadhar, Amir Lambrix, Patrick Li, Huanyu Li, Ying Hitzler, Pascal Paulheim, Heiko Pesquita, Catia Saveta, Tzanina Shvaiko, Pavel Splendiani, Andrea Thiéblin, Elodie Trojahn, Cássia Vataščinová, Jana Yaman, Beyza Zamazal, Ondřej Zhou, Lu Linköping University Swedish e-Science Research Center Linköping Sweden Friedrich Schiller University Jena Germany Laboratory Kansas State University United States BioData.pt INESC-ID Lisbon Portugal Institute of Computer Science-FORTH Heraklion Greece Pistoia Alliance Inc. United States University of Mannheim Germany City University of London United Kingdom Department of Informatics University of Oslo Norway LIRMM University of Montpellier CNRS France Fraunhofer FOKUS Berlin Germany Fraunhofer IAIS Sankt Augustin Germany LASIGE Faculdade de Ciências Universidade de Lisboa Portugal TasLab Trentino Digitale SpA Trento Italy Logilab France IRIT Université Toulouse II Toulouse France University of Economics Prague Czech Republic ADAPT Centre Dublin City University Ireland

The Ontology Alignment Evaluation Initiative (OAEI) aims at comparing ontology matching systems on precisely defined test cases. These test cases can be based on ontologies of different levels of complexity and use different evaluation modalities (e.g., blind evaluation, open evaluation, or consensus). The OAEI 2020 campaign offered 12 tracks with 36 test cases, and was attended by 19 participants. This paper is an overall presentation of that campaign. Copyright © 2020 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).

关键词： Ontology

Non-line-of-sight reconstruction using efficient transient rendering

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arXiv 2018年

作者： Iseringhausen, Julian Hullin, Matthias B. University of Bonn Institute of Computer Science II Bonn53115 Germany

Being able to see beyond the direct line of sight is an intriguing prospective and could benefit a wide variety of important applications. Recent work has demonstrated that time-resolved measurements of indirect diffuse light contain valuable information for reconstructing shape and reflectance properties of objects located around a corner. In this paper, we introduce a novel reconstruction scheme that, by design, produces solutions that are consistent with state-of-the-art physically-based rendering. Our method combines an efficient forward model (a custom renderer for time-resolved three-bounce indirect light transport) with an optimization framework to reconstruct object geometry in an analysis-by-synthesis sense. We evaluate our algorithm on a variety of synthetic and experimental input data, and show that it gracefully handles uncooperative scenes with high levels of noise or non-diffuse material reflectance. Copyright © 2018, The Authors. All rights reserved.

关键词： Light transmission

Rock glacier monitoring using aerial photographs: Conventional vs. UAV-based mapping - A comparative study

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Rock glacier monitoring using aerial photographs: Convention...

2018 ISPRS Technical Commission I Midterm Symposium on Innovative Sensing - From Sensors to Methods and Applications

作者： Kaufmann, V. Seier, G. Sulzer, W. Wecht, M. Liu, Q. Lauk, G. Maurer, M. Institute of Geodesy Graz University of Technology Steyrergasse 30 Graz8010 Austria Department of Geography and Regional Science University of Graz Heinrichstraße 36 Graz8010 Austria Institute of Applied Geosciences Graz University of Technology Steyrergasse 30 Graz8010 Austria Institute of Computer Graphics and Vision Graz University of Technology Inffeldgasse 16/II Graz8010 Austria

Rock glaciers are creep phenomena of mountain permafrost. Typically, these landforms look like lava flows from a bird's eye view. Active rock glaciers move downslope with flow velocities in the range of few centimeters to several meters per year. Thus, large masses of rock and ice can be gradually transported down-valley. In this paper we present a comparative study analyzing surface change for Tschadinhorn rock glacier, a relatively fast moving rock glacier located in the Hohe Tauern Range of the Austrian Alps. Aerial photographs (1954-2017) of both metric (conventional) and non-metric (UAV-based) aerial surveys were compared to derive multi-annual to annual flow vector fields and surface height change. For each time interval given we computed a single representative value for flow velocity and, if applicable, also for area-wide surface height change, i.e. volume change. The velocity graph obtained represents the temporal evolution of the kinematics of the rock glacier with good discrimination. Volume change was difficult to quantify since temporal changes were rather small and close to insignificance. The precision and accuracy of the results obtained were numerically quantified. Our study showed that for the Tschadinhorn rock glacier UAV-based aerial surveys can substitute conventional aerial surveys as carried out by national mapping agencies, such as the Austrian Federal Office of Metrology and Surveying (BEV). Thus, UAV-based aerial surveys can help to bridge the data gap between regular aerial surveys. The high accuracy of the UAV-derived results would even allow intra-annual change detection of flow velocity. © Authors 2018. CC BY 4.0 License.

关键词： Unmanned aerial vehicles (UAV)

A full solar cycle of proton and helium measurements 37

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A full solar cycle of proton and helium measurements

37th International Cosmic Ray Conference, ICRC 2021

作者： Marcelli, N. Boezio, M. Munini, R. Lenni, A. Ngobeni, D. Aslam, O.P.M. Bisschoff, D. Potgieter, M. Adriani, O. Barbarino, G.C. Bazilevskaya, G.A. Bellotti, R. Bogomolov, E.A. Bongi, M. Bonvicini, V. Bruno, A. Cafagna, F. Campana, D. Carlson, P. Casolino, M. Castellini, G. De Santis, C. Galper, A.M. Koldashov, S.V. Koldobskiy, S. Kvashnin, A.N. Leonov, A.A. Malakhov, V.V. Marcelli, L. Martucci, M. Mayorov, A.G. Menn, W. Merge, M. Mikhailov, V.V. Mocchiutti, E. Monaco, A. Mori, N. Osteria, G. Panico, B. Papini, P. Pearce, M. Picozza, P. Ricci, M. Ricciarini, S.B. Simon, M. Sotgiu, A. Sparvoli, R. Spillantini, P. Stozhkov, Y.I. Vacchi, A. Vannuccini, E. Vasilyev, G.I. Voronov, S.A. Yurkin, Y.T. Zampa, G. Zampa, N. IFPU TriesteI-34014 Italy University of Trieste Department of Physics TriesteI-34100 Italy North-West University Centre for Space Research Potchefstroom2520 South Africa Institute for Experimental and Applied Physics CA University in Kiel Germany University of Florence Department of Physics Florence Sesto FiorentinoI-50019 Italy INFN Sezione di Florence Florence Sesto FiorentinoI-50019 Italy University of Naples "Federico II" Department of Physics NaplesI-80126 Italy INFN Sezione di Naples NaplesI-80126 Italy Lebedev Physical Institute MoscowRU-119991 Russia University of Bari Department of Physics BariI-70126 Italy INFN Sezione di Bari BariI-70126 Italy INFN Sezione di Trieste TriesteI-34149 Italy IFPU Institute of Fundamental Physics of the Universe TriesteI-34151 Italy Ioffe Physical Technical Institute St. PetersburgRU-194021 Russia KTH Department of Physics The Oskar Klein Centre for Cosmoparticle Physics AlbaNova University Centre StockholmSE-10691 Sweden INFN Sezione di Rome "Tor Vergata" RomeI-00133 Italy RIKEN EUSO Team Global Research Cluster Saitama Wako-shi Japan IFAC Florence Sesto FiorentinoI-50019 Italy MEPhI: National Research Nuclear University MEPhI MoscowRU-115409 Russia University of Trieste Department of Physics TriesteI-34127 Italy University of Rome "Tor Vergata" Department of Physics RomeI-00133 Italy INFN Laboratori Nazionali di Frascati Via Enrico Fermi 40 FrascatiI-00044 Italy University of Siegen Department of Physics SiegenD-57068 Germany Istituto Nazionale di Astrofisica Fosso del cavaliere 100 RomaI-00133 Italy University of Udine Department of Mathematics Computer Science and Physics Via delle Scienze Udine206 Italy

Time-dependent energy spectra of galactic cosmic rays (GCRs) carry fundamental information regarding their origin and propagation. When observed at the Earth, these spectra are significantly affected by the solar wind and the embedded solar magnetic field that permeates the heliosphere, changing significantly over an 11-year solar cycle. Energy spectra of GCRs measured during different epochs of solar activity provide crucial information for a thorough understanding of solar and heliospheric phenomena. The PAMELA experiment had collected data for almost ten years (15 June 2006-23 January 2016), including the minimum phase of solar cycle 23 and the maximum phase of solar cycle 24. Here, we present spectra for protons and helium-nuclei measured by the PAMELA instrument from 2006 to 2014. Time profiles of the proton-to-helium flux ratio at various rigidities were also investigated, allowing the study of all characteristic features resulting from their different mass-to-charge ratio and the difference in the shape of their respective local interstellar spectra. The force-field approximation of the solar modulation was used to relate these dependencies to the different shapes of the local interstellar proton and helium-nuclei spectra. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Helium

Challenges and Outlook in Robotic Manipulation of Deformable Objects

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arXiv 2021年

作者： Zhu, Jihong Cherubini, Andrea Dune, Claire Navarro-Alarcon, David Alambeigi, Farshid Berenson, Dmitry Ficuciello, Fanny Harada, Kensuke Kober, Jens Li, Xiang Pan, Jia Yuan, Wenzhen Gienger, Michael Cognitive Robotics TU Delft Honda Research Institute Europe Netherlands LIRMM Université de Montpellier CNRS 161 Rue Ada Montpellier34090 France COSMER Laboratory EA 7398 Universié de Toulon La Garde83130 France The Hong Kong Polytechnic University Department of Mechanical Engineering Kowloon Hong Kong The University of Texas at Austin Austin United States The University of Michigan Ann ArborMI United States Università degli Studi di Napoli Federico II Napoli80125 Italy The Osaka University Japan The National Institute of AIST Japan Cognitive Robotics TU Delft Netherlands Department of Automation Tsinghua University Beijing China The Department of Computer Science The University of Hong Kong Pok Fu Lam Hong Kong Robotics Institute Carnegie Mellon University PittsburghPA15213 United States Honda Research Institute Europe Offenbach Germany

Deformable object manipulation (DOM) is an emerging research problem in robotics. The ability to manipulate deformable objects endows robots with higher autonomy and promises new applications in the industrial, services, and healthcare sectors. However, compared to rigid object manipulation, the manipulation of deformable objects is considerably more complex, and is still an open research problem. Addressing DOM challenges demand breakthroughs in almost all aspects of robotics, namely hardware design, sensing, (deformation) modeling, planning, and control. In this article, we review recent advances and highlight the main challenges when considering deformation in each sub-field. A particular focus of our paper lies in the discussions of these challenges and proposing future directions of research. © 2021, CC BY.

关键词： Deformation

Solar still performance investigation by incorporating the shape of basin liner: A short review

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Materials Today: Proceedings 2021年 43卷 597-604页

作者： Raj Vardhan Patel Kiran Bharti Gaurav Singh Rajeev Kumar Sandeep Chhabra Desh Bandhu Singh Department of Mechanical Engineering Sherwood College of Engineering Research and Technology Barabanki Uttar Pradesh 225003 India Department of Computer Science and Engineering Saraswati Institute of Engineering and Technology NH-24 Pilkhuwa Hapur Uttar Pradesh 245304 India Galgotias University Plot No. 2 Sector 17-A Yamuna Expressway Greater Noida G. B. Nagar UP India Galgotias College of Engineering and Technology Plot No. 1 Knowledge Park II Greater Noida UP India Uttar Pradesh Institute of Design C-22 C Block Phase 2 Industrial Area Sector – 62 Noida 201301 Uttar Pradesh India Department of Mechanical Engineering KIET Group of Institutions Delhi-NCR Ghaziabad 201206 UP India Department of Mechanical Engineering Graphic Era Deemed to be University Bell Road Clement Town Dehardun 248002 Uttarakhand India

The source of solar energy is unlimited and it has the potential of reducing the contemporary shortage of fresh water prevalent throughout the globe if the solar energy is used wisely. This source of energy has emerged as one of the best alternatives to mitigate the crisis of energy as well as fresh water which are the two important factors for the survival of human beings on the earth. The research is going on throughout the world and new type of solar energy technology based water purifiers are being reported. The various studies have been reported in the literature with various designs of the basin liner with an objective of increasing the fresh water output. In this work, a review on the performance investigation of solar still by incorporating the different shapes of basin liner has been carried out. Authors have critically reviewed the solar stills with fins, corrugates wick, hemispherical basin and stepped still. It has been concluded that the evaporation area can be increased by changing the design of basin liner which provides higher fresh water output.

关键词： Solar still Finned basin liner Corrugated shape Fresh water yield Evaporation area

Search for an axion-like particle with forward proton scattering in association with photon pairs at ATLAS

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arXiv 2023年

作者： Aad, G. Abbott, B. Abeling, K. Abicht, N.J. Abidi, S.H. Aboulhorma, A. Abramowicz, H. Abreu, H. Abulaiti, Y. Hoffman, A.C. Abusleme Acharya, B.S. Bourdarios, C. Adam Adamczyk, L. Adamek, L. Addepalli, S.V. Cppm Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma NormanOK United States II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory UptonNY United States Faculté des Sciences Université Mohammed v Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New YorkNY United States Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile Infn Gruppo Collegato di Udine Sezione di Trieste Udine Italy Ictp Trieste Italy Lapp Univ. Savoie Mont Blanc CNRS/IN2P3 Annecy France Agh University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics University of Toronto TorontoON Canada Department of Physics Brandeis University WalthamMA United States

A search for forward proton scattering in association with light-by-light scattering mediated by an axion-like particle is presented, using the ATLAS Forward Proton spectrometer to detect scattered protons and the central ATLAS detector to detect pairs of outgoing photons. Proton-proton collision data recorded in 2017 at a centre-of-mass energy of √s = 13 TeV were analysed, corresponding to an integrated luminosity of 14.6 fb-1. A total of 441 candidate signal events were selected. A search was made for a narrow resonance in the diphoton mass distribution, corresponding to an axion-like particle (ALP) with mass in the range 150-1600 GeV. No excess is observed above a smooth background. Upper limits on the production cross section of a narrow resonance are set as a function of the mass, and are interpreted as upper limits on the ALP production coupling constant, assuming 100% decay branching ratio into a photon pair. The inferred upper limit on the coupling constant is in the range 0.04-0.09 TeV-1at 95% confidence level. © 2023, CC BY.

关键词： Forward scattering