Article
Physics, Multidisciplinary
T. Shiraishi, I Todoroki, T. Naka, A. Umemoto, R. Kobayashi, O. Sato
Summary: The newly developed sub-MeV neutron detector, based on super-fine-grained nuclear emulsion as a nano-imaging tracker (NIT), demonstrates high accuracy in detecting neutron-induced proton recoils. The detection efficiency for recoil proton tracks of more than 2 mu m range reached 100%, with satisfactory recoil energy and angle distribution. Automatic track recognition system achieved high recognition efficiency for tracks of more than a few micrometers and showed excellent rejection power for gamma-rays.
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2021)
Article
Imaging Science & Photographic Technology
Katsuya Hirota, Tomoko Ariga, Masahiro Hino, Go Ichikawa, Shinsuke Kawasaki, Masaaki Kitaguchi, Kenji Mishima, Naoto Muto, Naotaka Naganawa, Hirohiko M. Shimizu
Summary: This paper presents two methods for neutron imaging using emulsion detectors, one with track analysis for high resolution and the other without track analysis for high-density irradiation, both demonstrating potential for high-resolution neutron imaging.
JOURNAL OF IMAGING
(2021)
Article
Materials Science, Ceramics
Yang Shi, Zhangyi Huang, Jingjing Chen, Mao Deng, Mingyu Su, Jianqi Qi, Jun Wang, Haomin Wang
Summary: In this study, high-density and fine-grained ZnO ceramics were successfully fabricated using high-pressure cold sintering. The effects of solvent fraction and applied pressure on the densification process were investigated. The results showed that excess solvent hindered the densification of the ceramics but resulted in grain refinement. Additionally, unlike traditional pressure-assisted sintering, the appropriate pressure improved densification and inhibited grain growth.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Applied
Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Naoto Muto, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Naotaka Naganawa, Takehiko R. Saito
Summary: Neutron imaging is a nondestructive inspection technique with various applications. Developing a high-resolution neutron detector is challenging. We investigated the suitability of neutron detectors based on fine-grained nuclear emulsions for high-resolution neutron imaging. Simulated images were used to determine the required track density, and a density of around 10(4) tracks per 100 x 100 µm² is sufficient for imaging applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Computer Science, Information Systems
Suncheng Xiang, Dahong Qian, Mengyuan Guan, Binjie Yan, Ting Liu, Yuzhuo Fu, Guanjie You
Summary: This paper introduces a manually constructed large-scale person dataset named FineGPR with attribute annotations, and proposes an attribute analysis pipeline called AOST to effectively train from millions of synthetic data. Experimental results show that FineGPR with AOST outperforms existing real and synthetic datasets, demonstrating its feasibility for the ReID task.
ACM TRANSACTIONS ON MULTIMEDIA COMPUTING COMMUNICATIONS AND APPLICATIONS
(2023)
Article
Computer Science, Artificial Intelligence
Shenming Li, Lin Feng, Linsong Xue, Yifan Wang, Dong Wang
Summary: This study addresses the issue of few-shot fine-grained classification and proposes a method that models inter-class boundaries in a human-like style. By extracting key parts and performing part-by-part comparison, the method demonstrates effective performance in dealing with a limited number of labeled samples.
INTERNATIONAL JOURNAL OF MACHINE LEARNING AND CYBERNETICS
(2023)
Article
Environmental Sciences
Qing Hu, Runsheng Li, Yan Xu, Chaofan Pan, Chaoyang Niu, Wei Liu
Summary: The study proposed a cascade framework for detecting arbitrary-oriented and multi-type aircraft in remote sensing images. The method uses a rotation-based detector to determine the position and direction of aircraft, and a fine-grained recognition subnetwork to recognize their types, achieving more accurate recognition. Experimental results showed high average precision on a challenging dataset.
JOURNAL OF APPLIED REMOTE SENSING
(2022)
Article
Construction & Building Technology
Ganghua Hu, Qing Yang, Xin Qiu, Dingchuan Zhang, Wenhao Zhang, Shanglin Xiao, Jingxian Xu
Summary: This study investigates and characterizes the fracture behavior of cold recycled asphalt emulsion mixtures (CRAEM) using digital image correlation (DIC) and acoustic emission (AE) techniques. The results show that cement content significantly affects the cracking resistance of CRAEM, and the fracture failure process can be divided into four stages based on the cumulative AE energy and AE amplitude. Analysis of DIC and AE data provides valuable insights into the fracture characteristics and damage evolution process of CRAEM.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
Ping Wang, Wenbang Hao, Yinli Jin
Summary: This paper successfully reconstructs the traffic flows of heavy, medium, and small vehicles by cleaning, normalizing, and filtering empirical data with the fusion of various sensor data. An improved deep belief network is proposed for predicting traffic flow in different time intervals. The method performs better in estimation and forecasting, particularly for longer time periods and heavy vehicles, benefiting traffic control and intelligent transportation systems.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Nanoscience & Nanotechnology
Yuqing Zhang, Jiye Li, Jinxiong Li, Tengyan Huang, Yuhang Guan, Yuhan Zhang, Huan Yang, Mansun Chan, Xinwei Wang, Lei Lu, Shengdong Zhang
Summary: This paper presents a capacitor-less embedded dynamic random access memory (eDRAM) technology based on oxide semiconductor (OS) transistors and demonstrates a self-aligned top-gate (SATG) amorphous InGaZnO (a-IGZO) thin-film transistor (TFT) using a simplified three-masks (3M) process. The performance of the TFT is improved by optimizing the gate insulator and interface defects, as well as manipulating the defects in the a-IGZO channel through a rapid thermal anneal. The developed TFTs show high device performance and minimal parasitic capacitances, enabling the realization of a high-performance and high-density monolithic-3D (M3D) integration.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yuxuan Liu, Shichang Liu, Liming Fu, Huanrong Wang, Wei Wang, Mao Wen, Aidang Shan
Summary: A new thermomechanical process involving heavy cold rolling and short-time heat treatment has been developed to fabricate fine-grained martensite microstructure in a low-cost plain low-carbon steel. Different ferrite-pearlite dual-phase microstructures were prepared via different processes, and the microstructure evolution and mechanical properties during short-time heat treatment were investigated. It was found that the volume fractions of transformed martensite increased with decreasing grain sizes of the pre-heat treatment dual phases. The rapid heating and short-time holding of the heat treatment promoted grain nucleation and inhibited grain growth, resulting in microstructure refinement. Tensile experiments showed that the heat treatment significantly improved the mechanical properties, with a yield strength improvement of 134% and a tensile strength improvement of 150% compared to the alloy without heat treatment.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Computer Science, Information Systems
Xiaoying Huang, Zhichuan Guo, Mangu Song
Summary: In today's data centers, achieving load balancing within servers is crucial for optimizing CPU resource utilization. Existing methods struggle to meet the demands of high-throughput scenarios. Therefore, this paper proposes an FPGA-based intra-server load balancer that offers high throughput while maintaining a good balance effect and flexibility.
INTERNATIONAL JOURNAL OF NETWORK MANAGEMENT
(2022)
Article
Engineering, Electrical & Electronic
Xiaoteng Zhao, Yong Chen, Lin Wang, Pui-In Mak, Franco Maloberti, Rui P. Martins
Summary: This article reports on a half-rate single-loop bang-bang clock and data recovery (BBCDR) circuit that does not require a reference and frequency detector (FD). The circuit achieves fast and robust frequency acquisition using a deliberate-current-mismatch charge-pump pair, resulting in significant power savings.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2022)
Article
Computer Science, Information Systems
Yumeng Liang, Anfu Zhou, Huanhuan Zhang, Xinzhe Wen, Huadong Ma
Summary: FG-LiquID is an accurate and robust system for fine-grained liquid identification. By focusing on the informative region of the mmWave spectrum and designing a novel neural network, FG-LiquID can accurately identify different liquids in daily scenarios, even with a difference of only 1% alcohol concentration.
PROCEEDINGS OF THE ACM ON INTERACTIVE MOBILE WEARABLE AND UBIQUITOUS TECHNOLOGIES-IMWUT
(2021)
Article
Physics, Nuclear
A. Shepetov, S. Mamina, V Piscal, V Ryabov, N. Saduyev, T. Sadykov, S. Shaulov, L. Vildanova, V Zhukov
Summary: The new multipurpose experimental complex at the Tien Shan mountain cosmic ray station of LPI includes detector subsystems for investigating the various components of extensive air showers (EAS) caused by cosmic ray interactions. Utilizing different types of detectors and multi-component techniques allows for effective research into aspects of high-energy cosmic ray interactions, potentially solving longstanding spectral problems.
PHYSICS OF ATOMIC NUCLEI
(2021)
Article
Instruments & Instrumentation
N. Muto, H. Abele, T. Ariga, J. Bosina, M. Hino, K. Hirota, G. Ichikawa, T. Jenke, H. Kawahara, S. Kawasaki, M. Kitaguchi, J. Micko, K. Mishima, N. Naganawa, M. Nakamura, S. Roccia, O. Sato, R. I. P. Sedmik, Y. Seki, H. M. Shimizu, S. Tada, A. Umemoto
Summary: This article presents the improvement of an UCN detector with high spatial resolution and the experimental results of measuring the spatial distribution of UCNs in the Earth's gravitational field. By aligning microscopic images with high accuracy and improving the detector holder, the resolution of the detector is enhanced.
JOURNAL OF INSTRUMENTATION
(2022)
Article
Physics, Multidisciplinary
Shoki Iwaguchi, Atsushi Nishizawa, Yanbei Chen, Yuki Kawasaki, Masaaki Kitaguchi, Taigen Morimoto, Tomohiro Ishikawa, Bin Wu, Izumi Watanabe, Ryuma Shimizu, Hirohiko Shimizu, Yuta Michimura, Seiji Kawamura
Summary: The improvement of sensitivity to gravitational waves at lower frequencies remains challenging due to displacement noise. A neutron displacement-noise-free interferometer is proposed as a solution. By adjusting the neutron speed, the detector configuration is simplified to a single Mach-Zehnder interferometer with two beamsplitters and two mirrors. In this configuration, all displacement noise is canceled in the frequency domain, which is explained intuitively using a phasor diagram.
Article
Nanoscience & Nanotechnology
G. Mariani, A. Umemoto, S. Nomura
Summary: We describe a homemade and portable setup for performing pulsed magnetic resonance experiments on nitrogen-vacancy (NV) centers in diamonds. The system utilizes an Arduino Uno board and an automatic voltage regulator microcontroller to drive precise laser and microwave pulses, allowing for characterization and manipulation of the electron spin of NV centers.
Article
Nuclear Science & Technology
Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Satoshi Kodaira, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Michio Sakashita, Norihito Saito, Takehiko R. Saito, Satoshi Wada, Nakahiro Yasuda
Summary: FNTDs are luminescent detectors that can be reused at least seven times for applications requiring high track density accumulation, such as imaging applications.
RADIATION MEASUREMENTS
(2022)
Article
Instruments & Instrumentation
H. Akatsuka, T. Andalib, B. Bell, J. Berean-Dutcher, N. Bernier, C. P. Bidinosti, C. Cude-Woods, S. A. Currie, C. A. Davis, B. Franke, R. Gaur, P. Giampa, S. Hansen-Romu, M. T. Hassan, K. Hatanaka, T. Higuchi, C. Gibson, G. Ichikawa, I. Ide, S. Imajo, T. M. Ito, B. Jamieson, S. Kawasaki, M. Kitaguchi, W. Klassen, E. Korkmaz, F. Kuchler, M. Lang, M. Lavvaf, T. Lindner, M. Makela, J. Mammei, R. Mammei, J. W. Martin, R. Matsumiya, E. Miller, K. Mishima, T. Momose, S. Morawetz, C. L. Morris, H. J. Ong, C. M. O'Shaughnessy, M. Pereira-Wilson, R. Picker, F. Piermaier, E. Pierre, W. Schreyer, S. Sidhu, D. Stang, V. Tiepo, S. Vanbergen, R. Wang, D. Wong, N. Yamamoto
Summary: Electroless nickel plating is a versatile coating suitable for transporting and storing ultracold neutrons. Through roughness measurements and UCN-storage experiments, UCN guide tubes plated by multiple vendors were evaluated and found to have similar UCN-storage properties. The energy dependence of UCN losses can be described by the imaginary Fermi potential. Based on these findings, a vendor was chosen to plate the UCN-production vessel for a new neutron source.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Instruments & Instrumentation
Sumi Naoyuki, Ichikawa Go, Mishima Kenji, Makida Yasuhiro, Kitaguchi Masaaki, Makise So, Matsuzaki Shun, Nagano Tomoya, Tanida Masaki, Uehara Hideaki, Yano Kodai, Otono Hidetoshi, Yoshioka Tamaki
Summary: The neutron lifetime is an important parameter, but measurement methods have shown disagreement in results. A new experiment called LiNA was proposed to overcome the problems of background contamination and signal cut inefficiency in the previous experiments. The LiNA system, which includes a detector with three drift layers and a uniform magnetic field, demonstrated improved background suppression and confinement of beta-rays, allowing for more accurate measurements of neutron lifetime.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Physics, Multidisciplinary
Shoki Iwaguchi, Atsushi Nishizawa, Yanbei Chen, Yuki Kawasaki, Tomohiro Ishikawa, Masaaki Kitaguchi, Yutaka Yamagata, Bin Wu, Ryuma Shimizu, Kurumi Umemura, Kenji Tsuji, Hirohiko Shimizu, Yuta Michimura, Seiji Kawamura
Summary: To detect gravitational waves more effectively, it is important to develop a technique for reducing mirror displacement noise in ground-based detectors at low frequencies. The neutron displacement-noise-free interferometer (DFI) is a tool that can minimize mirror displacement noise in the lower frequency range. This paper presents a simplified configuration of the neutron DFI based on the direction of neutron incidence. Unlike the previous configuration, which involved bidirectional incidences at two speeds, the new configuration allows unidirectional neutron incidence at four speeds. This simplification is crucial for proof-of-principle experiments.
Article
Physics, Applied
Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Naoto Muto, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Naotaka Naganawa, Takehiko R. Saito
Summary: Neutron imaging is a nondestructive inspection technique with various applications. Developing a high-resolution neutron detector is challenging. We investigated the suitability of neutron detectors based on fine-grained nuclear emulsions for high-resolution neutron imaging. Simulated images were used to determine the required track density, and a density of around 10(4) tracks per 100 x 100 µm² is sufficient for imaging applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Proceedings Paper
Chemistry, Inorganic & Nuclear
Sean Vanbergen, Wolfgang Schreyer, Shomi Ahmed, Taraneh Andalib, Mike Barnes, Beryl Bell, Jason Chak, Elspeth Cudmore, Beatrice Franke, Pietro Giampa, Patricia Gnyp, Moritz Hahn, Sean Hansen-Romu, Kichiji Hatanaka, David Jones, Katerina Katsika, Shinsuke Kawasaki, Elie Korkmaz, Kirk Madison, Juliette Mammei, Russell Mammei, Cameron Marshall, Jeffery Martin, Ryohei Matsumiya, Kenji Mishima, Takahiro Okamura, Ruediger Picker, Edgard Pierre, Des Ramsay, Gelo Remon, Steve Sidhu, Brendan Thorsteinson, Willem van Oers
Summary: The TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration is constructing a new UCN source with unprecedented densities of UCNs for experiments. They use a tantalum-clad tungsten spallation target, receiving 40 mu A of 480-MeV protons from TRIUMF's main cyclotron. The design choices for the target and target-handling system are described, along with benchmarking of the target performance using UCN production measurements.
30TH CONFERENCE OF THE INTERNATIONAL NUCLEAR TARGET DEVELOPMENT SOCIETY, INTDS2022
(2023)
Article
Optics
Yoshitaka Taira, Shunsuke Endo, Shiori Kawamura, Taro Nambu, Mao Okuizumi, Toshiyuki Shizuma, Mohamed Omer, Heishun Zen, Yasuaki Okano, Masaaki Kitaguchi
Summary: Inverse Compton scattering of polarized laser photons by energetic electrons is used to generate polarized gamma rays. The polarization of the gamma rays varies depending on the scattering angle, as shown by experimental measurements using magnetized iron. The gamma rays near the central axis are circularly polarized and transition to linear polarization as the scattering angle increases. Highly polarized gamma rays can be obtained by using a collimator that transmits only the central axis of the gamma rays with such polarization characteristics. This can be achieved through 90-degree collisional inverse Compton scattering between an electron beam and a circularly polarized laser.
Article
Instruments & Instrumentation
Shigeyasu Itoh, Seiso Fukumura, Takuhiro Fujiie, Masaaki Kitaguchi, Hirohiko M. Shimizu
Summary: This article introduces an experiment that uses the strong electric field inside a crystal interacting with dynamically-diffracted neutrons to study the electric dipole moment of neutrons. The experiment observed neutron spin rotation from different crystal planes and compared the results with previous experiments, showing that spin rotation can occur even on crystal planes where it was previously thought not possible.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
