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Overview of the LAMOST-Kepler project

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Research in Astronomy and Astrophysics 2020年第10期20卷 343-352页

作者： Jian-Ning Fu Peter De Cat Weikai Zong Antonio Frasca Richard O.Gray An-Bin Ren Joanna Molenda-Zakowicz Christopher J.Corbally Giovanni Catanzaro Jian-Rong Shi A-Li Luo Hao-Tong Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Royal Observatory of Belgium Ringlaan 3B-1180 BrusselBelgium inaf-Osservatorio Astrofisico di Catania Via S.Sofia 781-95123 CataniaItaly Department of Physics and Astronomy Appalachian State UniversityBooneNC 28608USA Department of Astronomy China West Normal UniversityNanchong 637002China Astronomical Institute of the University of Wroclaw ul.Kopernika 1151-622 WroclawPoland Vatican Observatory Research Group University of ArizonaTucsonAZ 85721-0065USA Key Lab for Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

The NASA Kepler mission obtained long-term high-quality photometric observations for a large number of stars in its original field of view from 2009 to *** provide reliable stellar parameters in a homogeneous way,the LAMOST telescope began to carry out low-resolution spectroscopic observations for as many stars as possible in the Kepler field in *** June 2018,238386 low-resolution spectra with SNRg≥6 had been collected for 155623 stars in the Kepler field,enabling the determination of atmospheric parameters and radial velocities,as well as spectral classification of the target *** information has been used by astronomers to carry out research in various fields,including stellar pulsations and asteroseismology,exoplanets,stellar magnetic activity and flares,peculiar stars and the Milky Way,binary stars,*** summarize the research progress in these fields where the usage of data from the LAMOST-Kepler(LK)project has played a *** addition,time-domain medium-resolution spectroscopic observations have been carried out for about 12000 stars in four central plates of the Kepler field since *** currently available results show that the LAMOST-Kepler medium resolution(LKMRS)observations provide qualified data suitable for research in additional science projects including binaries,high-amplitude pulsating stars,*** LAMOST is continuing to collect both low-and mediumresolution spectra of stars in the Kepler field,we expect more data to be released continuously and new scientific results to appear based on the LK project data.

关键词： astronomical database:miscellaneous technique:spectroscopy stars:general stars:statistics

Application of Selected Natural Antimicrobial Formulations for the Control of Food Pathogens in Fresh-Cut Cauliflower

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Journal of Food Science and Engineering 2014年第6期4卷 261-270页

作者： Pamphile Tawema Jaejoon Han Stephane Salmieri Khanh Dang Vu Monique Lacroix Research Laboratories in Sciences Applied to Food Nutraceutical and Functional Food Institute (INAF) Canadian Irradiation Center (CIC) 1NRS-Institute Armand-Frappier University of Quebec 531 Boulevard des Prairies Laval Quebec H7V 1B7 Canada Department of Food Bioscience and Technology Korea University Seoul 136-701 Korea

In recent years, research on biopolymer based-coating containing natural antimicrobial agents is developing significantly. The objective of this study was to evaluate the antimicrobial efficiency of six formulations containing pre-selected natural antimicrobial compounds against Listeria monocytogenes, Escherichia coli O 157：H7, Salmonella typhimurium, the total bacteria and total yeasts and molds in cauliflower. Each formulation was subjected to a sensory test in parallel to microbiological analysis and the efficiency during storage at 5 ℃ was evaluated for the two best formulations, based on their ability to eliminate the target microorganisms. Both formulations were able to reduce all pathogens and total flora below detectable levels after 24 h of storage at 5 ℃. Using washing or spraying treatments, the two formulations were able to reduce Listeria to undetectable levels for 3 d. This efficiency was extended to 7 d when the formulations were incorporated into an edible coating. Washing treatment with the two formulations was also able to limit the growth of yeast and molds at levels lower than 2 log, for more than 7 d. The population of E. coli was reduced to below the detection limit during 14 d of storage, after washing treatment with the two formulations. The spraying treatment of cauliflower with the formulations allowed the use of very small amounts of antimicrobials while maintaining a fairly good efficiency, greatly reducing the potential costs of implementing this method in the industry. Future research may focus on development of nanoemulsion of antimicrobial formulations based on the developed antimicrobial formulations in this study to improve the better coating efficiency.

关键词： Natural antimicrobials organic acids essential oils food pathogens shelf life.

Periodic interstellar scintillation variations of PSRs J0613-0200 and J0636+5128 associated with the Local Bubble shell

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Science China(Physics,Mechanics & Astronomy) 2023年第11期66卷 221-232页

作者： Yulan Liu Robert A.Main Joris P.W.Verbiest Ziwei Wu Krishnakumar M.Ambalappat Jiguang Lu David J.Champion Ismael Cognard Lucas Guillemot Kuo Liu James W.Mc Kee Nataliya Porayko Golam.M.Shaifullah Gilles Theureau National Astronomical Observatories Chinese Academy of SciencesBeijing100101China Fakultät für Physik Universität BielefeldBielefeld33501Germany Max-Planck-Institut für Radioastronomie Bonn53121Germany Florida Space Institute University of Central FloridaOrlandoFL32826USA Station de radioastronomie de Nançay Observatoire de ParisNançay18330France Laboratoire de Physique et Chimie de l’Environnement et de l’Espace Universitéd’OrléansOrléans45071France E.A.Milne Centre for Astrophysics University of HullHullHU67RXUK Centre of Excellence for Data Science Artificial Intelligence and ModellingUniversity of HullHullHU67RXUK Dipartimento di Fisica“G.Occhialini” Universitàdi Milano-BicoccaMilano20126Italy inaf-Osservatorio Astronomico di Cagliari Selargius(CA)09047Italy INFN Sezione di Milano-BicoccaMilano20126Italy

Annual variations of interstellar scintillation can be modelled to constrain parameters of the ionized interstellar *** a pulsar is in a binary system,then investigating the orbital parameters is possible through analysis of the orbital variation of *** observations carried out from 2011 to 2020 by the European Pulsar Timing Array radio telescopes,PSRs J0613-0200and J0636+5128 show strong annual variations in their scintillation velocity,while the former additionally exhibits an orbital *** theory and Markov-chain-Monte-Carlo methods are used to interpret these periodic *** assume a thin and anisotropic scattering screen model,and discuss the mildly and extremely anisotropic scattering *** J0613-0200is best described by mildly anisotropic scattering,while PSR J0636+5128 exhibits extremely anisotropic *** measure the distance,velocity,and degree of anisotropy of the scattering screen for our two pulsars,finding that scattering screen distances from Earth for PSRs J0613-0200 and J0636+5128 are 316_(-20)^(+28)pc and 262_(-38)^(+96)pc,*** positions of these scattering screens are coincident with the shell of the Local Bubble towards both *** associations add to the growing evidence of the Local Bubble shell as a dominant region of scattering along many sightlines.

关键词： pulsar interstellar scintillation ionized interstellar medium

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Effect of Matching Algorithm and Profile Shape on Pulsar Pulse Time of Arrival Uncertainties

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Research in Astronomy and Astrophysics 2023年第12期23卷 230-241页

作者： J.Wang J.P.W.Verbiest G.M.Shaifullah J.P.Yuan Ruhr-Universität Bochum Fakultät für Physik und AstronomieAstronomisches Institut(AIRUB)D-44801 BochumGermany Advanced Institute of Natural Sciences Beijing Normal UniversityZhuhai 519087China Fakulatät für Physik Universität BielefeldPostfach 100131D-33501 BielefeldGermany Max-Planck-Institut für Radioastronomie Auf dem Hügel 69D-53121 BonnGermany Florida Space Institute University of Central Florida12354 Research ParkwayOrlandoFL 32826USA Dipartimento di Fisica"G.Occhialini "Universitádegli Studi di Milano-BicoccaPiazza della Scienza 3I-20126 MilanoItaly INFN Sezione di Milano-BicoccaPiazza della Scienza 3I-20126 MilanoItaly Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China inaf-Osservatorio Astronomico di Cagliari via della Scienza 509047 Selargius(CA)Italy

For high-precision pulsar timing analysis and low-frequency gravitational wave detection,it is essential to accurately determine pulsar pulse times of arrival(ToAs)and associated *** measure the ToAs and their uncertainties,various cross-correlation-based techniques can be *** develop methodologies to investigate the impact of the template-matching method,profile shape,signal-to-noise ratio of both template and observation on ToA *** methodologies are then applied to data from the International Pulsar Timing *** demonstrate that the Fourier domain Markov chain Monte Carlo method is generally superior to other methods,while the Gaussian interpolation shift method outperforms other methods in certain cases,such as profiles with large duty cycles or smooth profiles without sharp ***,it is important to note that our study focuses solely on ToA uncertainty,and the optimal method for determining both ToA and ToA uncertainty may differ.

关键词： methods data analysis-(stars:)pulsars general-methods statistical

Production of antihypertensive and antidiabetic peptide fractions from quinoa(Chenopodium quinoa Willd.)by electrodialysis with ultrafi ltration membranes

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Food Science and Human Wellness 2022年第6期11卷 1650-1659页

作者： Adrián González-Muñoz Marion Valle Rotimi E.Aluko Laurent Bazinet Javier Enrione Biopolymer Research and Engineering Lab(BiopREL) School of Nutrition and DieteticsFaculty of MedicineUniversidad de los AndesMonseñorÁlvaro del Portillo 12455Chile Centre for Biomedical Research and Innovation(CIIB) Universidad de los AndesChileMonseñorÁlvaro del Portillo 12455Chile Institute of Nutrition and Functional Foods(inaf) UniversitéLavalQuébec QC G1V 0A6Canada Department of Anatomy and Physiology Faculty of MedicineLaval Hospital Research CenterUniversitéLavalQuébec QC G1V 4G5Canada Department of Food and Human Nutritional Sciences University of ManitobaWinnipeg MB R3T 2N2Canada Department of Food Sciences Laboratoire de Transformation Alimentaire et ProcédésÉlectro Membranaire(LTAPEMLaboratory of Food Processing and Electro-Membrane Processes)UniversitéLavalQuébec QC G1V 0A6Canada

Processing bioactive peptides from natural sources using electrodialysis with ultrafiltration membranes(EDUF)have gained attention since it can fractionate in terms of their charge and molecular *** is a pseudo-cereal highlighted by its high protein content,amino acid profile and adapting growing *** present work aimed at the production of quinoa peptides through fractionation using EDUF and to test the fractions according to antihypertensive and antidiabetic *** data showed the production of peptides ranging between 0.4 and 1.5 k ***(CQPF)(3.01%),anionic(AQPF)(1.18%)and the electrically neutral fraction quinoa protein hydrolysate(QPH)-EDUF(~95%)were ***-vitro studies showed the highest glucose uptake modulation in L6 cell skeletal myoblasts in presence of QPH-EDUF and AQPF(17%and 11%)indicating potential antidiabetic *** antihypertensive effect studied in-vivo in spontaneously hypertensive rats(SHR),showed a decrease in systolic blood pressure in presence of the fractionated peptides,being 100 mg/kg a dose comparable to Captopril(positive control).These results contribute to the current knowledge of bioactive peptides from quinoa by reporting the relevance of EDUF as tool to produce selected peptide ***,further characterization is needed towards peptide sequencing,their respective role in the metabolism and scaling-up production using EDUF.

关键词： Quinoa Electrodialysis with ultrafiltration membranes Bioactive peptides Antihypertensive Antidiabetic

First result from the Jinping Underground Nuclear Astrophysics experiment JUNA:precise measurement of the 92 keV ^(25)Mg(p,γ)^(26)Al resonance

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Science Bulletin 2022年第2期67卷 125-132,M0003页

作者： Jun Su Hao Zhang Zhihong Li Paolo Ventura Yunju Li Ertao Li Chen Chen Yangping Shen Gang Lian Bing Guo Xinyue Li Liyong Zhang Jianjun He Yaode Sheng Yinji Chen Luohuan Wang Long Zhang Fuqiang Cao Wei Nan Weike Nan Gexing Li Na Song Baoqun Cui Lihua Chen Ruigang Ma Zhicheng Zhang Taoyu Jiao Bingshui Gao Xiaodong Tang Qi Wu Jiaqing Li Liangting Sun Shuo Wang Shengquan Yan Junhui Liao Youbao Wang Sheng Zeng Ding Nan Qiwen Fan Ningchun Qi Wenliang Sun Xuyuan Guo Peng Zhang Yunhua Chen Yong Zhou Jifang Zhou Jinrong He Changsong Shang Mingchuan Li Jianping Cheng Weiping Liu JUNA Collaboration China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 101408China inaf Osservatorio Astronomico di RomaVia Frascati 33Monte Porzio Catone(RM)00077Italy College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China Yalong River Hydropower Development Company Chengdu 610051China 不详

The ^(25)Mg(p,γ)^(26)Al reaction plays an important role in the study of cosmic 1.809 MeV γ-ray as a signature of ongoing nucleosynthesis in the *** astrophysical temperature around 0.1 GK,the ^(25)Mg(p,γ)^(26)Al reaction rates are dominated by the 92 keV resonance capture *** report a precise measurement of the 92 keV ^(25)Mg(p,γ)^(26)Al resonance in the day-one experiment at Jinping Underground Nuclear Astrophysics experiment(JUNA)facility in the China Jinping Underground Laboratory(CJPL).The resonance strength and ground state feeding factor are determined to be 3.8±0.3×10^(-10) eV and 0:660:04,*** results are in agreement with those reported in the previous direct underground measurement within uncertainty,but with significantly reduced ***,we recommend new ^(25)Mg(p,γ)^(26)Al reaction rates which are by a factor of 2.4 larger than those adopted in REACLIB database at the temperature around 0.1 *** new results indicate higher production rates of ^(26g)Al and the cosmic 1.809 MeV γ-*** implication of the new rates for the understanding of other astrophysical situations is also discussed.

关键词： Nuclear astrophysics Underground laboratory Cosmic c ray Resonance reaction 26Al

Detailed characterization of a laboratory magnetized supercritical collisionless shock and of the associated proton energization

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Matter and Radiation at Extremes 2022年第1期7卷 15-28页

作者： W.Yao A.Fazzini S.N.Chen K.Burdonov P.Antici J.B´eard S.Bolaños A.Ciardi R.Diab E.D.Filippov S.Kisyov V.Lelasseux M.Miceli Q.Moreno V.Nastasa S.Orlando S.Pikuz D.C.Popescu G.Revet X.Ribeyre E.d’Humi`eres J.Fuchs LULI–CNRS CEAUPMC Univ Paris 06:Sorbonne Universit´eEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance Sorbonne Universit´e Observatoire de ParisUniversit´e PSLCNRSLERMAF-75005 ParisFrance ELI-NP “Horia Hulubei”National Institute for Physics and Nuclear Engineering30 Reactorului StreetRO-077125 Bucharest-MagureleRomania IAP Russian Academy of Sciences603155 Nizhny NovgorodRussia INRS-EMT 1650 Blvd.Lionel-BouletVarennesQuebec J3X 1S2Canada LNCMI UPR 3228CNRS-UGA-UPS-INSAF-31400 ToulouseFrance JIHT Russian Academy of Sciences125412 MoscowRussia Universit`a degli Studi di Palermo Dipartimento di Fisica e Chimica E.Segr`ePiazza del Parlamento 190134 PalermoItaly inaf–Osservatorio Astronomico di Palermo PalermoItaly University of Bordeaux Centre Lasers Intenses et ApplicationsCNRSCEAUMR 5107F-33405 TalenceFrance ELI-Beamlines Institute of PhysicsCzech Academy of Sciences5 Kvetna 83525241 Dolni BrezanyCzech Republic NRNU MEPhI 115409 MoscowRussia

Collisionless shocks are ubiquitous in the Universe and are held responsible for the production of nonthermal particles and high-energy *** the absence of particle collisions in the system,theory shows that the interaction of an expanding plasma with a pre-existing electromagnetic structure(as in our case)is able to induce energy dissipation and allow shock *** formation can alternatively take place when two plasmas interact,through microscopic instabilities inducing electromagnetic fields that are able in turn to mediate energy dissipation and shock *** our platform in which we couple a rapidly expanding plasma induced by high-power lasers(JLF/Titan at LLNL and LULI2000)with high-strength magnetic fields,we have investigated the generation of a magnetized collisionless shock and the associated particle *** have characterized the shock as being collisionless and *** report here on measurements of the plasma density and temperature,the electromagnetic field structures,and the particle energization in the experiments,under various conditions of ambient plasma and magnetic *** have also modeled the formation of the shocks using macroscopic hydrodynamic simulations and the associated particle acceleration using kinetic particle-in-cell *** a companion paper to Yao et al.[***.17,1177–1182(2021)],here we show additional results of the experiments and simulations,providing more information to allow their reproduction and to demonstrate the robustness of our interpretation of the proton energization mechanism as being shock surfing acceleration.

关键词： field collision shock

Statistical analyses for NANOGrav 5-year timing residuals

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Research in Astronomy and Astrophysics 2017年第2期17卷 63-76页

作者： Yan Wang James M. Cordes Fredrick A. Jenet Shami Chatterjee Paul B. Demorest Timothy Dolch Justin A. Ellis Michael T. Lam Dustin R. Madison Maura A. McLaughlin Delphine Perrodin Joanna Rankin Xavier Siemens Michele Vallisneri MOE Key Laboratory of Fundamental Physical Quantities Measurements School of Physics Huazhong University of Science and Technology Wuhan 430074 China Center for Advanced Radio Astronomy University of Texas at Brownsville 1 West University Boulevard Brownsville TX 78520 USA Department of Physics and Astronomy University of Texas at Brownsville 1 West University Boulevard Brownsville TX 78520 USA Department of Astronomy Cornell University Ithaca NY 14853 USA National Radio Astronomy Observatory 520 Edgemont Road Charlottesville VA 22903 USA Department of Physics Hillsdale College 33 E. College Street Hillsdale M149242 USA Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena CA 91106 USA Department of Physics West Virginia University EO. Box 6315 Morgantown WV 26505 USA inaf-Osservatorio Astronomico di Cagliari Via della Scienza 5 09047 Selargius (CA) Italy Department of Physics University of Vermont Burlington VT 05405 USA Center for Gravitation Cosmology and Astrophysics Department of Physics University of Wisconsin-Milwaukee P.O. Box 413 Milwaukee WI 53201 USA

In pulsar timing, timing residuals are the differences between the observed times of arrival and predictions from the timing model. A comprehensive timing model will produce featureless resid- uals, which are presumably composed of dominating noise and weak physical effects excluded from the timing model （e.g. gravitational waves）. In order to apply optimal statistical methods for detecting weak gravitational wave signals, we need to know the statistical properties of noise components in the residuals. In this paper we utilize a variety of non-parametric statistical tests to analyze the whiteness and Gaussianity of the North American Nanohertz Observatory for Gravitational Waves （NANOGrav） 5- year timing data, which are obtained from Arecibo Observatory and Green Bank Telescope from 2005 to 2010. We find that most of the data are consistent with white noise; many data deviate from Gaussianity at different levels, nevertheless, removing outliers in some pulsars will mitigate the deviations.

关键词： pulsar timing array general -- statistical tests

Production of antihypertensive and antidiabetic peptides fractions from quinoa(Chenopodium quinoa Willd.) through combined electrodialysis with ultrafiltration membranes

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Food Science and Human Wellness 2022年

作者： Adrián González-Mu?oza André Marette Rotimi Aluko Laurent Bazinet Javier Enrione Biopolymer Research and Engineering Lab (BiopREL) School of Nutrition and Dietetics Faculty of Medicine Universidad de los AndesChile.Monse?or álvaro del Portillo Centre for Biomedical Research and Innovation (CIIB) Universidad de los AndesChile.Monse?or álvaro del Portillo Institute of Nutrition and Functional Foods (inaf) Université Laval Department of Anatomy and Physiology Faculty of Medicine Laval Hospital Research Center Université Laval Department of Human Nutritional Sciences University of Manitoba Department of Food Science and Nutrition Laboratoire de Transformation Alimentaire et Procédés électroMembranaire (LTAPEM Laboratory of Food Processing and Electro-Membrane Processes) Université Laval

Processing bioactive peptides from natural sources using combined electrodialysis with ultrafiltration membranes(EDUF) have gained attention since it can fractionate in terms of their charge and molecular weight. Quinoa is a pseudo-cereal highlighted by its high protein content, amino acid profile and adapting growing conditions. The present work aimed at the production of quinoa peptides through fractionation using EDUF and to test the fractions according to antihypertensive and antidiabetic activity. Experimental data showed the production of peptide ranging between 0.4-1.5 kDa. Cationic(CQPF)(3.01%), anionic(AQPF)(1.18%) and the electrically neutral fraction QPH-EDUF(～95%) were obtained. In-vitro studies showed the highest glucose uptake modulation in L6 cell skeletal myoblasts in presence of QPH-EDUF and AQPF(17% and 11%) indicating potential antidiabetic activity. The antihypertensive effect studied in-vivo in spontaneously hypertensive rats(SHR), showed a decrease in systolic blood pressure in presence of the fractionated peptides, being 100 mg/kg a dose comparable to Captopril(positive control). These results contribute to the current knowledge of bioactive peptides from quinoa by reporting the relevance of EDUF as tool to produce selected peptide fractions. Nevertheless, further characterization is needed towards peptide sequencing, their respective role in the metabolism and scaling-up production using EDUF.

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