Article
Engineering, Geological
Xing Li, Wei Yao, Chonglang Wang
Summary: Dynamic fragmentation is a primary fracture type for rock mass in rock engineering, and it is crucial for fragmentation optimization. Multiple dynamic loading leads to the production of more fragments and influences the size distribution, especially when the loading rate is lower. Multiple loading pulses decrease the mean fragment size and generate more fine grains compared to single loading pulses. Therefore, single dynamic compressive loading should be used when evaluating the dynamic fragmentation efficiency of rocks to avoid inaccurate fragmentation size analysis.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Zi-En Zhang, Yuan-Yuan An, Bo Zheng, Jin-Ping Chang, Ying-Feng Han
Summary: The study functionalized NHC-based assemblies with orthogonal host-guest interaction to fabricate metal-carbene based supramolecular polymer gel. It was found that the gold carbene assemblies can complex with multiple ammonium salts without disrupting the underlying metal-carbene cylinders, while exhibiting multiple responsiveness in forming supramolecular polymer metallogel.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Libin Zeng, Yanfeng Chen, Bo Zhang, Dongyuan Qiu
Summary: This paper presents an accurate modeling and analysis method for on-off controlled VHF resonant boost converter considering multiple parasitic parameters. By dividing the system into a main network and a parasitic oscillation network, and taking into account the influences of the parameters, an equivalent circuit model is proposed. The periodic approximate analytical solution of the output voltage is obtained by using the equivalent small parameter method, and the steady-state waveform of the output voltage can be quickly obtained by combining the solution of the parasitic oscillation network and on-off state switching conditions.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Hyunwoo Heo, Hyungseup Kim, Donggeun You, Yongsu Kwon, Yil-suk Yang, Junghoon Lee, Hyoungho Ko
Summary: This paper presents a new type of PLL-based resonator driving IC with automatic parasitic capacitance cancellation and automatic gain control functions. The study has employed various techniques to compensate and cancel the distortion in the frequency response of the resonator.
MEASUREMENT & CONTROL
(2022)
Article
Pharmacology & Pharmacy
Basma Moutamenni, Nicolas Tabary, Alexandre Mussi, Jeremy Dhainaut, Carmen Ciotonea, Alexandre Fadel, Laurent Paccou, Jean-Philippe Dacquin, Yannick Guinet, Alain Hedoux
Summary: Mesoporous silica (MPS) carriers have potential in increasing drug solubility and stabilizing amorphous drug delivery. A solvent-free method called milling-assisted loading (MAL) allows manipulation of the drug's physical state within the pores. This study investigated the effects of milling intensity and pore architecture on drug state and release. The results showed that decreasing milling intensity promoted nanocrystallization of the confined drug, and the chemical modification of the pore surface also enhanced nanocrystallization. The particle size of the composites had the greatest influence on the drug release profile.
Article
Chemistry, Physical
Alexander P. Fellows, Vasileios Balos, Ben John, Alvaro Diaz Duque, Martin Wolf, Martin Thaemer
Summary: Second-order nonlinear spectroscopy is an important technique for studying interfacial systems due to its ability to analyze molecular structures and interactions. This study demonstrates that information about depth distributions, molecular orientation, and local dielectric properties can be extracted from the phase of the measured signal using multiple nonlinear pathways. This novel information can be correlated to characteristic vibrational spectra, enabling advanced sample characterization and analysis of interfacial molecular structures.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Junia Nomura, Tomohiko Momma, Yuki Kojima, Yusuke Hisai, Takumi Kobayashi, Daisuke Akamatsu, Feng-Lei Hong
Summary: In this study, a compact and low-power experimental setup for cold atoms was demonstrated, which is essential for cold atom experiments such as optical clocks and quantum simulations. Yb atoms were directly loaded into a 3D magneto-optical trap (MOT) from a dispenser atomic source without using a Zeeman slower. The power consumption of the dispenser was approximately 3 W. Spectroscopy of the atomic beam from the dispenser showed a flux of 1.4 x 10(13) s(-1) cm(-2) on the Yb transition at 399 nm. Up to 4.1 x 10(7) atoms could be loaded into the MOT with specific laser powers.
Article
Chemistry, Physical
Basma Moutamenni, Nicolas Tabary, Laurent Paccou, Yannick Guinet, Alain Hedoux
Summary: The capabilities of the recent MAL method were analyzed to confine amino acids within mesoporous silica matrices. The study showed a high filling degree of L-tryptophan into unmodified MCM-41 pores. Low-frequency Raman spectroscopy was found to be a suitable technique for determining the confinement of molecular materials within silica-based ordered mesoporous materials and probing their molecular conformation and interaction with the pore surface.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Physics, Multidisciplinary
Alto Osada, Atsushi Noguchi
Summary: Trapped-ion quantum technologies have been developed for decades and are used in various applications. Coherent manipulation of ions' oscillatory motions in an ion trap is crucial for quantum information processing. However, unwanted decoherence caused by fluctuating electric-field environment poses a challenge. Ablation loading with pulsed laser can reduce pollution and heat production. This paper demonstrates an efficient loading method for a single ion using laser ablation and successive photoionization, enabling deterministic single-ion loading and opening up new possibilities for functional ion-trap quantum devices.
JOURNAL OF PHYSICS COMMUNICATIONS
(2022)
Article
Construction & Building Technology
Hu-dan Tang, Ming-li Zhu
Summary: The deformation and failure of limestone are influenced by unloading or other disturbing loads. 3D acoustic emission experiments were conducted to explore the progressive propagation of micro-cracks and nonlinear breakage mechanisms. The results showed that energy conversion and distribution, as well as the role of pre-existing cracks, are crucial in the failure process, with the analytical solution of nonlinear parameters aligning well with experimental results.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Computer Science, Information Systems
Suvra Sekhar Das, Vivek Rangamgari, Shashank Tiwari, Subhas Chandra Mondal
Summary: This work introduces a time domain channel estimation method for OTFS to combat the impact of residual synchronization errors in high mobility scenarios. By analyzing the effects of residual synchronization errors, it is shown that OTFS exhibits better sparsity in time domain channel representation. In addition, utilizing low complexity MMSE equalization and SIC receiver can enhance system performance and mitigate against residual synchronization errors.
Article
Computer Science, Information Systems
Aritra Chatterjee, Vivek Rangamgari, Shashank Tiwari, Suvra Sekhar Das
Summary: The proposed NOMA-OTFS system combines the advantages of high mobility and high spectral efficiency, showing better system sum SE compared to OMA-OTFS at both system and link levels. While NOMA-OTFS improves outage SE compared to NOMA-OFDM, there is a decrease in mean SE. Link-level results demonstrate that the CWIC-based NOMA-OTFS receiver performs significantly better than NOMA-OFDM in terms of block error rate, goodput, and throughput.
IEEE SYSTEMS JOURNAL
(2021)
Article
Mechanics
I. A. Volkov, L. A. Igumnov, D. N. Shishulin, E. Boev
Summary: The article addresses the issue of assessing the kinetics of stress-strain state and damage accumulation in polycrystalline structural materials under highly loaded conditions caused by non-stationary long-term thermal force loading. It presents a mathematical model based on the mechanics of a damaged medium and provides proof of its applicability for different loading conditions through numerical simulations and comparison with experimental data.
MECHANICS OF SOLIDS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Jaroslav Dragoun, Jakub Talla
Summary: The Fortescue theorem is a valuable technique for transforming three-phase systems into symmetrical components, but it is not suitable for real-time systems. This paper proposes a solution by combining the Fortescue theorem with a second-order generalized integrator (SOGI). The proposed algorithm can identify voltage vectors and process systems with multiple harmonics.
2022 20TH INTERNATIONAL CONFERENCE ON MECHATRONICS - MECHATRONIKA (ME)
(2022)
Article
Engineering, Electrical & Electronic
Q. Courte, M. Rack, M. Nabet, P. Cardinael, J-P Raskin
Summary: This paper compares the differences in RF performances among various advanced substrates such as TR, PSi, Au-Si, and DP, and investigates the influence of temperature and DC bias voltage. The purpose is to provide an overview and a more in-depth analysis of the characteristics of DP substrate to aid design choices for RF-IC applications.
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY
(2022)
Article
Chemistry, Physical
Elisabeth Smela
FARADAY DISCUSSIONS
(2017)
Article
Engineering, Biomedical
Bathiya Prashan Senevirathna, Sheung Lu, Marc P. Dandin, John Basile, Elisabeth Smela, Pamela A. Abshire
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2018)
Article
Instruments & Instrumentation
Ying Chen, Miao Yu, Hugh A. Bruck, Elisabeth Smela
SMART MATERIALS AND STRUCTURES
(2018)
Article
Chemistry, Analytical
Joni Kilpijarvi, Niina Halonen, Maciej Sobocinski, Antti Hassinen, Bathiya Senevirathna, Kajsa Uvdal, Pamela Abshire, Elisabeth Smela, Sakari Kellokumpu, Jari Juuti, Anita Lloyd Spetz
Article
Instruments & Instrumentation
Ying Chen, Miao Yu, Hugh A. Bruck, Elisabeth Smela
SMART MATERIALS AND STRUCTURES
(2018)
Article
Biophysics
Bathiya Senevirathna, Sheung Lu, Marc Dandin, John Basile, Elisabeth Smela, Pamela Abshire
BIOSENSORS & BIOELECTRONICS
(2019)
Article
Engineering, Biomedical
Bathiya P. Senevirathna, Sheung Lu, Marc P. Dandin, Elisabeth Smela, Pamela A. Abshire
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2019)
Article
Engineering, Multidisciplinary
Elisabeth Smela
Summary: This study investigates the use of bipolar current injection and voltage measurement patterns in electrical impedance tomography (EIT) for tactile sensing. The performance of 36 unique combinations for a 16-electrode system is evaluated through simulations. The choice of pattern should be based on the specific application's needs, with performance influenced by electrode placement symmetry and sensitivity at the center of the sensor. Patterns with high spatial symmetry and adjacent electrode positions should be avoided, while a 3-3 pattern may be a good strategy for overall performance. The use of 13 electrodes instead of 16 is also examined for greater flexibility in pattern selection and potential reduction in data collection time. Decreasing noise on the signal is more important than selecting from among the remaining patterns.
ENGINEERING RESEARCH EXPRESS
(2022)
Article
Engineering, Multidisciplinary
Elisabeth Smela
Summary: This article investigates the application of electrical impedance tomography (EIT) in tactile sensing. The study finds that noise destabilizes EIT images and introduces artefacts. To manage the destabilization, the authors propose an efficient criterion based on the onset of artefacts to evaluate tactile sensor image quality. The study also evaluates different methods for determining optimal hyperparameters.
ENGINEERING RESEARCH EXPRESS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Kang Choi, Kasun Pathirage, Salman Azam, Pamela Abshire, Roy Anderson, Elisabeth Smela
Summary: This paper presents a handheld fluorometer that can detect blue/green fluorescence from small Stokes shift fluorophores. It introduces two novel techniques to emulate far-field operation while operating in the near field. The detection of Alexa Fluor 488 achieved a sensitivity of 26 (seconds per decade of dilution) and a resolution of 0.01 (concentration units).
2022 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS 22)
(2022)
Proceedings Paper
Automation & Control Systems
Lasitha Weerakoon, Zepeng Ye, Rahul Subramonian Bama, Elisabeth Smela, Miao Yu, Nikhil Chopra
Summary: This paper explores integrated estimation and control of soft robots, introducing a new method of estimating curvature using stretchable sensing skin. The study includes uni-directional and bi-directional bending of soft robots, and demonstrates successful curvature tracking control through integrated soft sensing skin.
2021 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION (ICRA 2021)
(2021)
Article
Engineering, Biomedical
Ahmed Ramadan, Anindo Roy, Elisabeth Smela
IEEE JOURNAL OF TRANSLATIONAL ENGINEERING IN HEALTH AND MEDICINE
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Bathiya Senevirathna, Sheung Lu, Nathan Renegar, Marc Dandin, Elisabeth Smela, Pamela Abshire
2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Bathiya Senevirathna, Alexander Castro, Timir Datta-Chaudhuri, Elisabeth Smela, Pamela Abshire
2017 IEEE 60TH INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS (MWSCAS)
(2017)
Proceedings Paper
Engineering, Mechanical
Hugh A. Bruck, Elisabeth Smela, Miao Yu, Ying Chen, Joshua Spokes
MECHANICS OF COMPOSITE AND MULTI-FUNCTIONAL MATERIALS, VOL 7
(2017)