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  • Closed Access
    Authors: 
    Zhen'An Liu; Jia Tao; Jingzhou Zhao; Hanjun Kou; Pengcheng Cao; Jianing Song; Wenxuan Gong; R. Itoh; Satoru Yamada; Q. D. Zhou;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    While the current Belle II data acquisition (DAQ) system has proven to be reliable in the first collisions delivered since May 2018, an upgrade to increase the bandwidth of the readout system is foreseen to be deployed over the next few years for higher target luminosit...

  • Open Access English
    Authors: 
    A. Dolgov; S. I. Godunov; A.S. Rudenko;
    Publisher: EDP Sciences

    We present a model where it is possible to generate cosmologically large domains of matter and antimatter separated by cosmologically large distances. Domain walls existed only in the early universe and later they disappeared. So the problem of domain walls in this mode...

  • Closed Access
    Authors: 
    Ann, Nurnajmin Qasrina; Pebrianti, Dwi; Bayuaji, Luhur; Daud, Mohd Razali; Samad, Rosdiyana; Ibrahim, Zuwairie; Hamid, Rosyati; Syafrullah, Mohammad;
    Publisher: Springer Singapore

    In this paper, a novel image template matching approach to tackle distance measurement problem has been proposed. There are many conventional algorithms to increase the accuracy of distance measurement as reported in the literature such as Semi-global algorithm to produ...

  • Publication . Article . 2021
    Closed Access
    Authors: 
    William Rice; James E. Levy; David P. Adams; Douglas R. Nichols; Richard K. Harrison; Matthew B. Jordan; Liam D. Claus; Daniel J. Dorsey;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    Recent advances in semiconductor processing technology have enabled development of a solid-state neutron sensor with exceptional efficiency for its unique reduced size. The boron-10 ( $n$ , alpha) capture reaction is used to detect incident thermal neutrons. This reacti...

  • Publication . Article . Preprint . 2019
    Open Access English
    Authors: 
    Samuel Laliberte; Robert Brandenberger;
    Project: NSERC

    In this paper, we study some aspects of moduli stabilization using string gases in the context of the Swampland. In the framework which we derive, the matter Lagrangian for string gases yields a potential for the size moduli which satisfies the de Sitter conjecture with...

  • Open Access English
    Authors: 
    Guo, Rui-Yun; Zhang, Jing-Fei; Zhang, Xin;

    We wish to investigate whether there is an extension to the base $\Lambda$CDM cosmology that can resolve the tension between the Planck observation of the cosmic microwave background anisotropies and the local measurement of the Hubble constant. We consider various plau...

  • Open Access English
    Authors: 
    Jackson Levi Said; Jurgen Mifsud; David Parkinson; Emmanuel N. Saridakis; Joseph Sultana; Kristian Zarb Adami;

    A violation of the distance-duality relation is directly linked with a temporal variation of the electromagnetic fine-structure constant. We consider a number of well-studied $f(T)$ gravity models and we revise the theoretical prediction of their corresponding induced v...

  • Open Access
    Authors: 
    Hellfeld, Daniel; Barton, Paul; Gunter, Donald; Haefner, Andrew; Mihailescu, Lucian; Vetter, Kai;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Country: United States

    The ability to localize and map the distribution of gamma-ray emitting radionuclides in 3D has applications ranging from medical imaging to nuclear security. In the case of radiological source search and nuclear contamination remediation, the deployment of freely moving...

  • Authors: 
    Vimal Kant Pandey; Cher Ming Tan;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    A transimpedance amplifier (TIA) is an essential electronic circuit in prompt gamma detection. To improve the performance and reliability of the electronics, we designed a TIA using GaN high electron mobility transistor (HEMT) as it is more radiation-hardened when compa...

  • Publication . Preprint . Article . 2020
    Open Access
    Authors: 
    Nicolás Bernal; Javier Rubio; Hardi Veermäe;
    Publisher: IOP Publishing
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    We present a novel UV freeze-in mechanism for enhancing the dark matter abundance in cosmologies where inflation is followed by an epoch dominated by a fluid stiffer than radiation. In such scenarios, even a small radiation abundance, produced for instance by instantane...

  • Closed Access
    Authors: 
    K. S. Bormotin; N. A. Taranukha;
    Publisher: Pleiades Publishing Ltd

    Functionals of direct and inverse problems of forming structural components are constructed taking into account the theory of incomplete reversibility of deformations. Formulations of these problems are given, and the uniqueness of their solutions is proved. An iterativ...

  • Authors: 
    M. Sukhanya; K. Gavaskar;
    Publisher: IEEE

    Inter-Integrated Circuit (I2C) plays an important role as an interface in communication between devices. EEPROMS, ADC, DAC and RTC require an interface for communication and I2C is used as an interface between them. The RTL behavior of the I2C Master Controller is verif...

  • Publication . Preprint . Article . 2020
    Open Access
    Authors: 
    Masahiro Kawasaki; Shusuke Ueda;
    Publisher: IOP Publishing

    Affleck-Dine inflation is a recently proposed model in which a single complex scalar field, nonminimally coupled to gravity, drives inflation and simultaneously generates the baryon asymmetry of universe via Affleck-Dine mechanism. In this paper we investigate the super...

  • Closed Access
    Authors: 
    Omprakash, Anup P.; Ildefonso, Adrian; Fleetwood, Zachary E.; Tzintzarov, George N.; Cardoso, Adilson S.; Babcock, Jeffrey A.; Mukhopadhyay, Rajarshi; Khachatrian, Ani; Warner, Jeffrey H.; McMorrow, Dale; +2 more
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    The single-event transient response of a high-voltage complementary SiGe-on-silicon-on-insulator technology is investigated along with its temperature dependence using a pulse laser. The p-n-p silicon-germanium heterojunction bipolar transistor (SiGe HBT) shows a larger...

  • Authors: 
    Slawosz Uznanski; Ruben Garcia Alia; Markus Brugger; C. Cangialosi; Salvatore Danzeca; Benjamin Todd;
    Publisher: IEEE

    Unlike a typical Radiation Hardness Assurance (RHA) methodology, this work presents a system level radiation qualification of a complex electronic system prior to component radiation characterization tests. Such a top-down approach reduces the beam time needed for quali...

  • Open Access
    Authors: 
    Wang, Yu; Liu, Shubin; Feng, Changqing; Shen, Zhongtao; Zhang, Junbin; Hong, Daojin; Liu, Jianbei; Zhou, Yi;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    CEPC (Circular Electron and Positron Collider) is a large experiment facility proposed by Chinese particle physics community. One of its running option is being the Higgs factory. Calorimeter is the main part of this experiment to measure the jet energy. Semi-digital ha...

  • Authors: 
    Bhavana Gaddipati; Usha Rani Nelakuditi; John William Carey Medithe;
    Publisher: IEEE

    It is very much difficult to call the patient every time to have EEG test, when a physician wants to examine the outcome of the diagnosis. Currently, there are many data acquisition schemes for monitoring the signals from the psyche and designed to perform EEG in the Re...

  • Publication . Conference object . Preprint . 2017
    Open Access English
    Authors: 
    Maria Grazia Pia; Elisabetta Ronchieri;

    We report an investigation of data analysis methods derived from other disciplines, which we applied to physics software systems. They concern the analysis of inequality, trend analysis and the analysis of diversity. The analysis of inequality exploits statistical metho...

  • Open Access English
    Authors: 
    Santanu Das; Anh Phan;

    Cosmological Boltzmann codes are often used by researchers for calculating the CMB angular power spectra from different theoretical models, for cosmological parameter estimation, etc. Therefore, the accuracy of a Boltzmann code is of utmost importance. Different Markov ...

  • Open Access English
    Authors: 
    S. Mohandas; R. J. van den Hoogen; D. Winters; M. Dala;
    Project: NSERC

    Utilizing the autonomous system of ordinary differential equations derived in arXiv:1809.01458 to define the evolution, we further investigate a class of cosmological models within an Einstein-aether gravitational framework by introducing a non-trivial coupling between ...

  • Authors: 
    Xiaoyu Zhou; Yonggang Wang; Yong Xiao; Zhengqi Song;
    Publisher: IEEE

    Time over dynamic threshold (TODT) has been proven to be an effective method in our previous work for nuclear energy signal digitizing. Comparing with other time over threshold (TOT) methods, TODT can translate the amplitude of nuclear pulses into time width with strict...

  • Authors: 
    Sterling Miranda Plata;
    Publisher: American Scientific Publishers
  • Authors: 
    B. Vandevelde; N. Chatry; N. Sukhaseum; J. Guillermin; L. Gouyet; A. Rousset; R. Gaillard; David Dangla; Eric Lorfevre;
    Publisher: IEEE

    The work presented here investigates the impact of multiple write cycles on NAND Flash memory radiation sensitivity. Cobalt 60 tests have been performed in order to study the memory array data corruption evolution with respect to the TID level. Heavy ion tests have also...

  • Publication . Preprint . Article . 2020
    Open Access English
    Authors: 
    Marcos A. G. Garcia; Kunio Kaneta; Yann Mambrini; Keith A. Olive;
    Publisher: HAL CCSD
    Country: France
    Project: ANR | IPS (ANR-11-IDEX-0003), ANR | P2IO (ANR-10-LABX-0038)

    We analyze in detail the perturbative decay of the inflaton oscillating about a generic form of its potential $V(\phi) = \phi^k$, taking into account the effects of non-instantaneous reheating. We show that evolution of the temperature as a function of the cosmological ...

  • Authors: 
    Ika Febrian Kristiana; Costrie Ganes Widayanti;
    Publisher: American Scientific Publishers
  • Closed Access
    Authors: 
    M. Ribière; F. de Gaufridy de Dortan; R. Delaunay; D. Aubert; T. Gouriou; R. Maisonny; T. d'Almeida;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    This article aims to quantify the radiation-induced electric responses of coaxial cables while irradiated by a pulsed X-ray flux. First, a precise characterization of the X-ray generator was performed using the 3-D Maxwell and Monte Carlo numerical simulations. These re...

  • Open Access
    Authors: 
    John Ellis; Malcolm Fairbairn; Marek Lewicki; Ville Vaskonen; Alastair Wickens;
    Publisher: IOP Publishing
    Project: NSF | Kavli Institute for Theor... (1748958), EC | DARKHORIZONS (648680)

    We discuss the observability of circular polarisation of the stochastic gravitational-wave background (SGWB) generated by helical turbulence following a first-order cosmological phase transition, using a model that incorporates the effects of both direct and inverse ene...

  • Publication . Article . Preprint . 2018
    Open Access English
    Authors: 
    A. Karagiorgos; T. Pailas; N. Dimakis; G. O. Papadopoulos; Petros A. Terzis; Theodosios Christodoulakis;

    In the present work we revisit the axisymmetric Bianchi VIII and IX models. At the classical level we reproduce the known analytic solution, in a novel way making use of two quadratic integrals of motion, the constraint equation, as well as a linear non-local integral o...

  • Open Access
    Authors: 
    J. Perez Padrón; J.P. Pérez Padrón; César-Fernando Méndez-Barrios; Emilio J. González-Galván;
    Publisher: Sociedad Mexicana de Fisica A C

    This paper presents an application of a Fractional Order Time Delay Neural Networks to chaos synchronization. The two main methodologies, on which the approach is based, are fractional order time-delay recurrent neural networks and the fractional order inverse optimal c...

  • Open Access
    Authors: 
    Foran, Brendan; Mann, Colin; Peterson, Mark; Bushmaker, Adam; Wang, Bo; Chen, Jihan; Yang, Sisi; Cronin, Stephen B.;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Project: NSF | Collaborative Research: T... (1402906)

    We report on photoluminescence (PL) spectroscopy and transmission electron microscope imaging of suspended and substrate-supported flakes of the 2-D semiconductor MoS2 before and after exposure to 100-keV proton radiation with fluences of $6 \times 10^{13}$ , $6\times 1...

  • Authors: 
    Yueer Li; Zhibiao Cheng; Chen Yang; Mengfu Wei; Junhai Wen;
    Publisher: IEEE

    This paper focuses on gamma camera motion parameters estimation applied in accurate radioactive source image reconstruction. Compared with traditional experimental and medical detection scenarios, the practical application scene of a radioactive source detector is more ...

  • Open Access
    Authors: 
    Klaes MØller; Peter B. Denton; Irene Tamborra;
    Publisher: IOP Publishing

    The sources of cosmic rays with energies above 55 EeV are still mysterious. A guaranteed associated flux of ultra high energy neutrinos known as the cosmogenic neutrino flux will be measured by next generation radio facilities, such as the proposed Giant Radio Array for...

  • Closed Access
    Authors: 
    Grace, C. R.; Stezelberger, T.; Denes, P.;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    Programmable Electronic Termination and Line Driver (PETAL) is a 16-channel ADC driver chip that provides single-ended-to-differential conversion and column biasing for high-speed CMOS image sensors. By increasing the level of integration, the number of driver chips and...

  • Open Access English
    Authors: 
    Sam Young; Marcello Musso;

    We consider the application of peaks theory to the calculation of the number density of peaks relevant for primordial black hole (PBH) formation. For PBHs, the final mass is related to the amplitude and scale of the perturbation from which it forms, where the scale is d...

  • Closed Access
    Authors: 
    Shaozhong Yue; Lei Zhifeng; Chao Peng; Zhong Xiangli; Jinbin Wang; Zhang Zhangang; Yun-Fei En; Wang Yunhui; Liang Hu;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    The electrical characteristics and low-frequency noise (LFN) of AlGaN/GaN high-electron-mobility transistors (HEMTs) after 3-MeV proton irradiation up to a total dose of 5.0 $\times 10^{14}$ p/cm2 have been studied in this article. The devices experienced a 14.6% decrea...

  • Authors: 
    Luo Sheng; He Wei; Zhang Zhun; He Lingxiang; Cao Jianmin; Wu Qingyang;
    Publisher: IEEE

    A layout technique via pulse quenching is tested in this paper. The limitation of layout technique is found by 3D device experiment. The new requirement of layout technique can be affirmed that layout technique via pulse quenching is more suitable in nMOS under 90nm tec...

  • Authors: 
    Andrew M. Keller; Michael Wirthlin;
    Publisher: IEEE

    FPGAs are being used in data center applications in large quantities. Single-event upsets (SEUs) occur more frequently within large-scale deployments of SRAM-based FPGAs. This work estimates the neutron cross section for SEUs in the configuration memory and memory block...

  • Open Access English
    Authors: 
    G. Gabella; Bethany L. Goldblum; T. A. Laplace; J. J. Manfredi; Joseph Gordon; Z.W. Sweger; Edith Bourret;

    Organic scintillators doped with capture agents provide a detectable signal for neutrons over a broad energy range. This work characterizes the fast and slow neutron response of EJ-254, an organic plastic scintillator with 5% natural boron loading by weight. For fast ne...

  • Publication . Article . 2018
    Closed Access
    Authors: 
    Jaehyun Lee; In Soo Ko; Jang-Hui Han; Juho Hong; Haeryong Yang; Chang-Ki Min; Heung-Sik Kang;
    Publisher: Korean Physical Society

    A photoinjector is used as the electron source to generate a high peak current and low emittance beam for an X-ray free electron laser (FEL). The beam emittance is one of the critical parameters to determine the FEL performance together with the slice energy spread and ...

  • Authors: 
    Toru Matsumura; Takao Shinkawa;
    Publisher: IEEE

    Li-containing scintillators arranged in cage-shaped are proposed as a fast-neutron imager for nuclear security. Counting rate difference among the scintillators enables us to reconstruct the direction of neutron source by the aid of an iterative-Bayesian unfolding metho...

  • Authors: 
    M. F. F. Ab Rashid; M Jusop; Nik Mohd Zuki Nik Mohamed; F. R. M. Romlay;
    Publisher: American Scientific Publishers

    One of the challenges in combinatorial optimization is to optimize travelling salesman problem with precedence constraint (TSPPC). The optimization algorithm to deal with this problem is continuously developed and improved to enhance its performance. Genetic algorithm (...

  • Authors: 
    Andrea Castoldi; Chiara Guazzoni; S. Maffessanti; M. Porro; F. Erdinger; Peter Fischer; Manfred Kirchgessner; Massimo Manghisoni;
    Publisher: IEEE

    The availability of on-chip sources with high degree of accuracy able to probe the response of the x-ray imaging detectors in all the conditions foreseen at the European XFEL is a key issue in order to implement automated procedures in order to trim gain and offset of e...

  • Publication . Article . Preprint . 2020
    Open Access
    Authors: 
    Raymond T. Co; Eric Gonzalez; Keisuke Harigaya;
    Publisher: IOP Publishing

    Reheating is a process where the energy density of a dominant component of the universe other than radiation, such as a matter component, is transferred into radiation. It is usually assumed that the temperature of the universe decreases due to cosmic expansion even dur...

  • Authors: 
    Ge Tang; Mo Li; Peng Sun; Lei Wang; Kexin Peng; Jian Zhang; Peng Feng; Biao Wei;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    A pulsed laser has been effectively applied in dose rate effects simulation for its stable pulse output, low cost, simple operation, and lack of ionizing risks for users. The conversion factor (CF) was proposed to describe the equivalence between the responses generated...

  • Authors: 
    Li Ding; Ping Kang; Wenbo Yin; Linli Wang;
    Publisher: IEEE

    This paper introduces a hardware TCP Offload Engine (TOE) aiming at low-latency communication systems. The throughput can reach 9.99 Gbps with the Jumbo frame. The input-to-output receiving latency of a packet consists of 100 bytes payload and 64 bytes header with times...

  • Open Access English
    Authors: 
    Bogeun Gwak;

    We investigate the weak cosmic censorship conjecture for Kerr-Sen black holes, which are solutions to the four-dimensional low-energy effective field theory for the heterotic string theory, based on the scattering of a charged scalar field. When the fluxes of the scalar...

  • Publication . Article . Preprint . 2019
    Open Access
    Authors: 
    Renata Kallosh; Andrei Linde;
    Publisher: IOP Publishing
    Project: NSF | Research in Particle Theo... (1720397)

    Hilltop inflation models are often described by potentials $V = V_{0}(1-{\phi^{n}\over m^{n}}+...)$. The omitted terms indicated by ellipsis do not affect inflation for $m \lesssim 1$, but the most popular models with $n =2$ and $4$ for $m \lesssim 1$ are ruled out obse...

  • Authors: 
    Jihwan Boo; Mark D. Hammig; Manhee Jeong;
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    In order to improve the image quality of a coded-aperture-based gamma-ray imaging apparatus, a method for removing Compton scattered and other multipixel events is presented that removes inaccurate position estimations from the data stream. In coded-aperture gamma-ray i...

  • Open Access
    Authors: 
    Guo-Ping Li; Ke-Jian He;
    Publisher: IOP Publishing

    In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Ho\v{r}ava-Lifshitz(HL) gravity. The results show that the event horizon $...

  • Publication . Part of book or chapter of book . 2020
    Closed Access
    Authors: 
    Atsuto Seko; Hiroyuki Hayashi; Hisashi Kashima; Isao Tanaka;
    Publisher: Springer International Publishing

    Chemically relevant compositions (CRCs) and atomic arrangements of inorganic compounds have been collected as inorganic crystal structure databases. Machine learning is a unique approach to search for currently unknown CRCs from a vast number of candidates. Firstly, we ...