Article
Geosciences, Multidisciplinary
Federica Ghione, Andreas Kohler, Anna Maria Dichiarante, Ingrid Aarnes, Volker Oye
Summary: To estimate seismic hazard and risk on local scales, understanding site amplification factors is crucial. However, national or regional seismic hazard studies often do not consider local site effects, as local site conditions may not be well understood. This study proposes an efficient and non-invasive methodology to derive the local average shear wave velocity (Vs30) of the ground, which is an important parameter for assessing soil amplification and extending knowledge of site characteristics. The proposed methodology integrates various data sources, including well databases, topographic slope derived from Digital Elevation Models, and near-surface Quaternary geological maps. By using the Horizontal to Vertical Spectral Ratio (HVSR) method and a statistics-based geological mapping tool (COHIBA), the study demonstrates the potential for cost-efficient mapping of seismic site amplification on a municipality scale.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
A. Daag, L. E. Aque, O. Locaba, R. Grutas, R. Solidum Jr
Summary: This research investigates the use of microtremor horizontal-to-vertical spectral ratio (H/V) to obtain site response characteristics and explore its relationship with soil liquefaction potential. By analyzing the H/V curves and the liquefaction potential index (LPI) of the soil, the study reveals that the shape, predominant period, and relative amplitude of the H/V curve are fundamentally linked to the spatial variability and shear strength of soils. The research also validates the use of the predominant period as a complementary tool for rapid site-specific liquefaction assessment.
GEOMATICS NATURAL HAZARDS & RISK
(2023)
Article
Computer Science, Software Engineering
Kwassi Joseph Dzahini, Michael Kokkolaras, Sebastien Le Digabel
Summary: The StoMADS-PB algorithm is proposed for constrained stochastic blackbox optimization, which deals with objective and constraint functions provided by a noisy blackbox. The method utilizes estimates and probabilistic bounds for constraint violations, allowing infeasible solutions. With the use of Clarke nonsmooth calculus and martingale theory, convergence results for the objective and violation function are proven with probability one.
MATHEMATICAL PROGRAMMING
(2023)
Article
Robotics
Murilo Marques Marinho, Bruno Vilhena Adorno
Summary: This study proposes an adaptive constrained kinematic control strategy that compensates for calibration errors in the robot's motion model online, leading to improved accuracy and safety in robotic applications.
IEEE TRANSACTIONS ON ROBOTICS
(2022)
Article
Astronomy & Astrophysics
Michael Gedalin, Christopher T. Russell, Andrew P. Dimmock
Summary: The Mach number is a crucial parameter in collisionless shocks, but its observational accuracy is compromised by various factors. This study analyzes a set of CLUSTER observed shocks to establish a relationship between maximum magnetic compression and the Alfvenic Mach number, proposing it as a proxy for Mach number estimates in incomplete data situations.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Michael C. Jaskolka, Maureen Tarsio, Anne M. Smardon, Md Murad Khan, Patricia M. Kane
Summary: The vacuolar H+-ATPase (V-ATPase) is a proton pump responsible for acidifying organelles in cells. The RAVE complex plays a crucial role in the reassembly of V-ATPases through the rapid and reversible disassembly and reassembly processes. Native RAVE and RAVE-V1 complexes purified using an inducible overexpression system contain substoichiometric levels of subunit C, suggesting their importance in V-ATPase reassembly.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2021)
Article
Quantum Science & Technology
John H. Selby, Ana Belen Sainz, Victor Magron, Lukasz Czekaj, Micha l Horodecki
Summary: Understanding the permissible set of correlations in nature is a fundamental problem in quantum theory. This paper takes a complementary viewpoint and investigates the correlations that physical theories can exhibit under certain constraints on measurements. It is shown that demanding a theory to have a composite measurement imposes constraints on the structure of its sets of states and effects, leading to constraints on the allowed correlations. The existence of a correlated measurement that reads out the parity of local fiducial measurements is specifically studied, and it is found that this assumption has strong consequences for violations of Bell inequalities, including the recovery of Tsirelson's bound in certain situations.
Article
Engineering, Electrical & Electronic
Paolo Carbone, Johan Schoukens, Alessio De Angelis, Antonio Moschitta, Francesco Santoni
Summary: This article introduces a novel estimation framework for the parameters in a linear-in-the-parameter estimation problem when one-bit measurements are processed. Experimental results validate the theoretical analysis and show that different estimation approaches provide different performance levels.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Green & Sustainable Science & Technology
Jin Fu, Yiwei Jian, Yali Wu, Dingjiang Chen, Xu Zhao, Youhua Ma, Shiwei Niu, Yufeng Wang, Fulin Zhang, Changxu Xu, Sheng Wang, Limei Zhai, Feng Zhou
Summary: The study re-evaluated the runoff losses of nitrogen (N) and phosphorus (P) from rice paddies in China using a newly-developed model, showing that the national N and P losses were lower than previous estimates but higher than NPCP data. Hotspots were identified in south China, with most losses occurring during non-fertilization period and in single rice system.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Geochemistry & Geophysics
Xiaoyi Shen, Chang-Qing Ke, Qimao Wang, Jie Zhang, Lijian Shi, Xi Zhang
Summary: The study examined sea ice thickness estimates derived from ICESat-2, showing its high reliability in total freeboard but notable differences in SIT estimates compared to IceBird data, likely due to uncertainties from other parameters. The BMA method proved to be the best for SIT estimation, with potential error sources in ice density and snow depth that require further investigation.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Mathematics, Applied
Sebastian Franz
Summary: The discretisation of H-div-functions on rectangular meshes involves three families of finite elements, namely Raviart-Thomas, Brezzi-Douglas-Marini, and Arnold-Boffi-Falk elements. In order to prove convergence of numerical methods using these elements, sharp interpolation error estimates are important, especially in an anisotropic setting.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Sriram Ganesan, Iman Javaheri, Veera Sundararaghavan
Summary: Measurement and analysis of microstructures are crucial for materials design and structural performance. By using a generalized inverse Voronoi problem to approximate 3D microstructures from surface EBSD images, the study was able to compare predicted surface strains to experimentally measured data, finding that surface strains were qualitatively similar among different reconstructions but subsurface grains influenced the choice of activated slip systems. The results highlight the importance of performing a full 3D crystal plasticity analysis for accurate interpretation of measured surface data.
MECHANICS OF MATERIALS
(2021)
Article
Environmental Sciences
Erdem Bayrak
Summary: This study investigates the soil properties that contribute to the destructive effect of earthquakes in the Eastern Pontides region of Turkey. The results identify Samsun province as a risky area due to its soil characteristics, highlighting the need for detailed microzonation studies in the region.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Shuting Liu, Baochang Zhang, Yiqing Liu, Anjia Han, Huijuan Shi, Tian Guan, Yonghong He
Summary: Pathological examination is crucial for cancer diagnosis, with virtual IHC image generation playing an important role in areas where traditional IHC examination is challenging. A novel adversarial learning method is proposed to effectively generate Ki-67-stained images, showcasing superior performance and robustness.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2021)
Article
Automation & Control Systems
Xiong Yang, Haibo He
Summary: This article addresses an event-driven H-infinity control problem for continuous-time nonlinear systems with asymmetric input constraints. By converting the problem into a two-person zero-sum game and developing a novel event-triggering condition to exclude Zeno behavior, the study provides a solution for handling the issue effectively. Utilizing adaptive critic learning framework, a single critic network is used to solve the event-driven Hamilton-Jacobi-Isaacs equation and demonstrate the guaranteed uniform ultimate boundedness of all signals in the closed-loop system.
IEEE TRANSACTIONS ON CYBERNETICS
(2021)
Article
Geosciences, Multidisciplinary
Francesco Mulargia, Guido Visconti, Robert J. Geller
EARTH-SCIENCE REVIEWS
(2018)
Editorial Material
Geochemistry & Geophysics
Francesco Mulargia, Philip B. Stark, Robert J. Geller
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2018)
Review
Geochemistry & Geophysics
S. Molnar, J. F. Cassidy, S. Castellaro, C. Cornou, H. Crow, J. A. Hunter, S. Matsushima, F. J. Sanchez-Sesma, A. Yong
SURVEYS IN GEOPHYSICS
(2018)
Article
Geosciences, Multidisciplinary
Lara Bertello, Matteo Berti, Silvia Castellaro, Gabriela Squarzoni
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2018)
Article
Engineering, Geological
D. Sandron, M. Santulin, A. Tamaro, C. Orci, G. Benedetti, S. Castellaro, R. Romeo, A. Rebez, S. Grimaz, P. Malisan, G. Guadagnini, F. Sciascia, D. Slejko
BULLETIN OF EARTHQUAKE ENGINEERING
(2019)
Article
Geochemistry & Geophysics
Francesco Mulargia
GEOPHYSICAL JOURNAL INTERNATIONAL
(2019)
Article
Mechanics
S. Castellaro, S. Russo
COMPOSITE STRUCTURES
(2019)
Article
Geochemistry & Geophysics
Giulia Sgattoni, Silvia Castellaro
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Geochemistry & Geophysics
Rajiv Kumar, Ram Bichar Singh Yadav, Silvia Castellaro
SEISMOLOGICAL RESEARCH LETTERS
(2020)
Article
Geochemistry & Geophysics
Silvia Castellaro, Giulia Alessandrini, Giuseppe Musinu
Summary: The role of local geology in controlling ground motion is important, but less attention is commonly given to the seismic station installation. This study examines the effect of housing, foundation, and pillar on seismic records and proposes a working scheme to identify potential installation-related issues. The maximum reliable frequency, below which no soil-structure interaction is expected, is also highlighted as crucial information.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Luca Tavasci, Alessandro Lambertini, Davide Donati, Valentina Alena Girelli, Giovanni Lattanzi, Silvia Castellaro, Stefano Gandolfi, Lisa Borgatti
Summary: This paper describes the procedure for building a high-quality 3D model of a rocky pinnacle in the Dolomites, Italy, using Structure from Motion (SfM) techniques. The study compares models of different qualities and point densities to determine the optimal trade-off between processing time and accuracy. The results show that higher quality models allow for more detailed mapping of discontinuities, with some drawbacks due to noise. The paper also discusses the limitations and challenges of performing discontinuity mapping in the different models.
Article
Engineering, Civil
Andrea Calidori, Giacomo Bernagozzi, Silvia Castellaro, Luca Landi, Pier Paolo Diotallevi
Summary: Modal flexibility-based methods are effective for vibration-based structural damage detection. This paper proposes a method for estimating a proportional flexibility-resembling (PFR) matrix without the need for explicit identification of modal parameters. The proposed method avoids the typical two-stage approach of traditional methods.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Geochemistry & Geophysics
Michael W. Asten, Alan Yong, Sebastiano Foti, Koichi Hayashi, Antony J. Martin, William J. Stephenson, John F. Cassidy, Jacie Coleman, Robert Nigbor, Silvia Castellaro, Kosuke Chimoto, Cecile Cornou, Ikuo Cho, Takumi Hayashida, Manuel Hobiger, Chun-Hsiang Kuo, Albert Macau, E. Diego Mercerat, Sheri Molnar, Passakorn Pananont, Marco Pilz, Nakhorn Poovarodom, Esteban Saez, Marc Wathelet, Hiroaki Yamanaka, Toshiaki Yokoi, Don Zhao
Summary: This study evaluates earthquake site effects using geophysical site characterization methods and provides recommendations for preferred arrays and processing methodology for future studies.
JOURNAL OF SEISMOLOGY
(2022)
Article
Geochemistry & Geophysics
Giulia Sgattoni, Silvia Castellaro
Summary: By combining microtremor and gravity data, a unique 3D bedrock model of the Bolzano sedimentary basin was derived, demonstrating the successful interpretation of the stratigraphic model through analyzing ground resonance frequencies and gravity data.
Article
Geosciences, Multidisciplinary
Giulia Alessandrini, Umberta Tinivella, Michela Giustiniani, Ivan de la Cruz Vargas-Cordero, Silvia Castellaro