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The Faculty/ Researcher Works collection focuses on research, scholarship, and creative works, as well as materials that primarily reflect the intellectual environment of the Temple University campus.

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Recent Submissions

  • Understanding band gaps of solids in generalized Kohn-Sham theory

    Perdew, JP; Yang, W; Burke, K; Yang, Z; Gross, EKU; Scheffler, M; Scuseria, GE; Henderson, TM; Zhang, IY; Ruzsinszky, A; Peng, H; Sun, J; Trushin, E; Görling, A; Perdew, John P|0000-0003-4237-824X; Peng, Haowei|0000-0002-6502-8288 (2017-03-14)
    The fundamental energy gap of a periodic solid distinguishes insulators from metals and characterizes low-energy single-electron excitations. However, the gap in the band structure of the exact multiplicative Kohn-Sham (KS) potential substantially underestimates the fundamental gap, a major limitation of KS densityfunctional theory. Here, we give a simple proof of a theorem: In generalized KS theory (GKS), the band gap of an extended system equals the fundamental gap for the approximate functional if the GKS potential operator is continuous and the density change is delocalized when an electron or hole is added. Our theorem explains how GKS band gaps from metageneralized gradient approximations (meta-GGAs) and hybrid functionals can be more realistic than those from GGAs or even from the exact KS potential. The theorem also follows from earlier work. The band edges in the GKS one-electron spectrum are also related to measurable energies. A linear chain of hydrogen molecules, solid aluminum arsenide, and solid argon provide numerical illustrations.
  • A novel comparison of Moller and Compton electron-beam polarimeters

    Magee, JA; Narayan, A; Jones, D; Beminiwattha, R; Cornejo, JC; Dalton, MM; Deconinck, W; Dutta, D; Gaskell, D; Martin, JW; Paschke, KD; Tvaskis, V; Asaturyan, A; Benesch, J; Cates, G; Cavness, BS; Dillon-Townes, LA; Hays, G; Hoskins, J; Ihloff, E; Jones, R; King, PM; Kowalski, S; Kurchaninov, L; Lee, L; McCreary, A; McDonald, M; Micherdzinska, A; Mkrtchyan, A; Mkrtchyan, H; Nelyubin, V; Page, S; Ramsay, WD; Solvignon, P; Storey, D; Tobias, WA; Urban, E; Vidal, C; Waidyawansa, B; Wang, P; Zhamkotchyan, S (2017-03-10)
    We have performed a novel comparison between electron-beam polarimeters based on M{\o}ller and Compton scattering. A sequence of electron-beam polarization measurements were performed at low beam currents ($<$ 5 $\mu$A) during the $Q_{\rm weak}$ experiment in Hall C at Jefferson Lab. These low current measurements were bracketed by the regular high current (180 $\mu$A) operation of the Compton polarimeter. All measurements were found to be consistent within experimental uncertainties of 1% or less, demonstrating that electron polarization does not depend significantly on the beam current. This result lends confidence to the common practice of applying M{\o}ller measurements made at low beam currents to physics experiments performed at higher beam currents. The agreement between two polarimetry techniques based on independent physical processes sets an important benchmark for future precision asymmetry measurements that require sub-1% precision in polarimetry.
  • Exclusive η electroproduction at W&gt;2 GeV with CLAS and transversity generalized parton distributions

    Bedlinskiy, I; Kubarovsky, V; Stoler, P; Adhikari, KP; Akbar, Z; Anefalos Pereira, S; Avakian, H; Ball, J; Baltzell, NA; Battaglieri, M; Batourine, V; Biselli, AS; Boiarinov, S; Briscoe, WJ; Burkert, VD; Cao, T; Carman, DS; Celentano, A; Chandavar, S; Charles, G; Ciullo, G; Clark, L; Colaneri, L; Cole, PL; Contalbrigo, M; Crede, V; D'Angelo, A; Dashyan, N; De Vita, R; De Sanctis, E; Deur, A; Djalali, C; Dupre, R; Alaoui, AE; Fassi, LE; Elouadrhiri, L; Eugenio, P; Fanchini, E; Fedotov, G; Fersch, R; Filippi, A; Fleming, JA; Forest, TA; Garçon, M; Gevorgyan, N; Ghandilyan, Y; Gilfoyle, GP; Giovanetti, KL; Girod, FX; Gleason, C; Golovatch, E; Gothe, RW; Griffioen, KA; Guidal, M; Guo, L; Hafidi, K; Hakobyan, H; Hanretty, C; Harrison, N; Hattawy, M; Hicks, K; Hughes, SM; Hyde, CE; Ilieva, Y; Ireland, DG; Ishkhanov, BS; Isupov, EL; Jenkins, D; Jiang, H; Jo, HS; Joo, K; Joosten, S; Keller, D; Khachatryan, G; Khachatryan, M; Khandaker, M; Kim, A; Kim, W; Klein, FJ; Kuhn, SE; Kuleshov, SV; Lanza, L; Lenisa, P; Livingston, K; MacGregor, IJD; Markov, N; McKinnon, B; Meziani, ZE; Mirazita, M; Mokeev, V; Montgomery, RA; Movsisyan, A; Munoz Camacho, C; Nadel-Turonski, P; Net, LA; Ni, A; Niccolai, S; Niculescu, G; Osipenko, M; Ostrovidov, AI (2017-03-10)
    © 2017 American Physical Society. The cross section of the exclusive η electroproduction reaction ep→e′p′η was measured at Jefferson Laboratory with a 5.75 GeV electron beam and the CLAS detector. Differential cross sections d4σ/dtdQ2dxBdφη and structure functions σU=σT+ϵσL,σTT, and σLT, as functions of t, were obtained over a wide range of Q2 and xB. The η structure functions are compared with those previously measured for π0 at the same kinematics. At low t, both π0 and η are described reasonably well by generalized parton distributions (GPDs) in which chiral-odd transversity GPDs are dominant. The π0 and η data, when taken together, can facilitate the flavor decomposition of the transversity GPDs.
  • Elliptic flow of electrons from heavy-flavor hadron decays in Au + Au collisions at √sNN =200, 62.4, and 39 GeV

    Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Ajitanand, NN; Alekseev, I; Anderson, DM; Aoyama, R; Aparin, A; Arkhipkin, D; Aschenauer, EC; Ashraf, MU; Attri, A; Averichev, GS; Bai, X; Bairathi, V; Behera, A; Bellwied, R; Bhasin, A; Bhati, AK; Bhattarai, P; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Bouchet, J; Brandenburg, JD; Brandin, AV; Brown, D; Bunzarov, I; Butterworth, J; Caines, H; Calderón De La Barca Sánchez, M; Campbell, JM; Cebra, D; Chakaberia, I; Chaloupka, P; Chang, Z; Chankova-Bunzarova, N; Chatterjee, A; Chattopadhyay, S; Chen, X; Chen, JH; Chen, X; Cheng, J; Cherney, M; Christie, W; Contin, G; Crawford, HJ; Das, S; De Silva, LC; Debbe, RR; Dedovich, TG; Deng, J; Derevschikov, AA; Didenko, L; Dilks, C; Dong, X; Drachenberg, JL; Draper, JE; Dunkelberger, LE; Dunlop, JC; Efimov, LG; Elsey, N; Engelage, J; Eppley, G; Esha, R; Esumi, S; Evdokimov, O; Ewigleben, J; Eyser, O; Fatemi, R; Fazio, S; Federic, P; Federicova, P; Fedorisin, J; Feng, Z; Filip, P; Finch, E; Fisyak, Y; Flores, CE; Fulek, L; Gagliardi, CA; Garand, D; Geurts, F; Gibson, A; Girard, M; Grosnick, D; Gunarathne, DS; Guo, Y; Gupta, S; Gupta, A; Guryn, W; Hamad, AI; Hamed, A; Harlenderova, A; Harris, JW; He, L; Heppelmann, S (2017-03-13)
    © 2017 American Physical Society. We present measurements of elliptic flow (v2) of electrons from the decays of heavy-flavor hadrons (eHF) by the STAR experiment. For Au+Au collisions at sNN=200 GeV we report v2, for transverse momentum (pT) between 0.2 and 7 GeV/c, using three methods: the event plane method (v2{EP}), two-particle correlations (v2{2}), and four-particle correlations (v2{4}). For Au+Au collisions at sNN=62.4 and 39 GeV we report v2{2} for pT<2GeV/c. v2{2} and v2{4} are nonzero at low and intermediate pT at 200 GeV, and v2{2} is consistent with zero at low pT at other energies. The v2{2} at the two lower beam energies is systematically lower than at sNN=200 GeV for pT<1GeV/c. This difference may suggest that charm quarks interact less strongly with the surrounding nuclear matter at those two lower energies compared to sNN=200 GeV.
  • Babies Living Safe & Smokefree: Randomized controlled trial of a multilevel multimodal behavioral intervention to reduce low-income children's tobacco smoke exposure

    Collins, BN; Lepore, SJ; Lepore, Stephen J.|0000-0001-7370-6280; Sarwer, David B|0000-0003-1033-5528 (2017-03-14)
    © 2017 The Author(s). Background: Addressing children's tobacco smoke exposure (TSE) remains a public health priority. However, there is low uptake and ineffectiveness of treatment, particularly in low-income populations that face numerous challenges to smoking behavior change. A multilevel intervention combining system-level health messaging and advice about TSE delivered at community clinics that disseminate the Special Supplemental Nutrition Program for Women, Infants and Children (WIC), combined with nicotine replacement and intensive multimodal, individual-level behavioral intervention may improve TSE control efforts in such high-risk populations. Methods/Design: This trial uses a randomized two-group design with three measurement points: baseline, 3-month and 12-month follow-up. The primary outcome is bioverified child TSE; the secondary outcome is bioverified maternal quit status. Smoking mothers of children less than 6 years old are recruited from WIC clinics. All participants receive WIC system-level intervention based on the "Ask, Advise, Refer (AAR)" best practices guidelines for pediatrics clinics. It includes training all WIC staff about the importance of maternal tobacco control; and detailing clinics with AAR intervention prompts in routine work flow to remind WIC nutrition counselors to ask all mothers about child TSE, advise about TSE harms and benefits of protection, and refer smokers to cessation services. After receiving the system intervention, mothers are randomized to receive 3 months of additional treatment or an attention control intervention: (1) The multimodal behavioral intervention (MBI) treatment includes telephone counseling sessions about child TSE reduction and smoking cessation, provision of nicotine replacement therapy, a mobile app to support cessation efforts, and multimedia text messages about TSE and smoking cessation; (2) The attention control intervention offers equivalent contact as the MBI and includes nutrition-focused telephone counseling, mobile app, and multimedia text messages about improving nutrition. The control condition also receives a referral to the state smoking cessation quitline. Discussion: This study tests an innovative community-based, multilevel and integrated multimodal approach to reducing child TSE in a vulnerable, low-income population. The approach is sustainable and has potential for wide reach because WIC can integrate the tobacco intervention prompts into routine workflow and refer smokers to free evidence-based behavioral counseling interventions, such as state quitlines. Trial registration: Clinicaltrials.gov NCT02602288. Registered 9 November 2015.
  • Constructing geometrically equivalent hyperbolic orbifolds

    McReynolds, D; Meyer, JS; Stover, M (2017-03-14)
    © 2017, Mathematical Sciences Publishers. All rights reserved. We construct families of nonisometric hyperbolic orbifolds that contain the same isometry classes of nonflat totally geodesic subspaces. The main tool is a variant of the well-known Sunada method for constructing length-isospectral Riemannian manifolds that handles totally geodesic submanifolds of multiple codimensions simultaneously.
  • Effects of biaxial strain on the improper multiferroicity in h-LuFe O3 films studied using the restrained thermal expansion method

    Sinha, K; Zhang, Y; Jiang, X; Wang, H; Wang, X; Zhang, X; Ryan, PJ; Kim, JW; Bowlan, J; Yarotski, DA; Li, Y; Dichiara, AD; Cheng, X; Wu, X; Xu, X (2017-03-14)
    © 2017 American Physical Society. Elastic strain is potentially an important approach in tuning the properties of the improperly multiferroic hexagonal ferrites, the details of which, however, have been elusive due to experimental difficulties. Employing the method of restrained thermal expansion, we have studied the effect of isothermal biaxial strain in the basal plane of h-LuFeO3 (001) films. The results indicate that a compressive biaxial strain significantly enhances the K3 structural distortion (the order parameter of the improper ferroelectricity), and the effect is larger at higher temperatures. The compressive biaxial strain and the enhanced K3 structural distortion together cause an increase in the electric polarization and a reduction in the canting of the weak ferromagnetic moments in h-LuFeO3, according to our first principles calculations. These findings are important for understanding the strain effect as well as the coupling between the lattice and the improper multiferroicity in h-LuFeO3. The experimental elucidation of the strain effect in h-LuFeO3 films also suggests that the restrained thermal expansion can be a viable method to unravel the strain effect in many other thin film materials.
  • Signal transduction growth factors: The effective governance of transcription and cellular adhesion in cancer invasion

    Domenico, MD; Giordano, A; Giordano, Antonio|0000-0002-5959-016X (2017-03-16)
    © Domenico et al. Giulio Bizzozero classified the tissues concerning their capacity to self-renew during the adult life in labile, stable and permanent tissues. In 1940 Viktor Hamburger and Rita Levi Montalcini exposed the possibility to induce the growth of permanent cells thanks to a specific ligand Nerve Growth Factor (NGF). Stanley Cohen purified a protein the Epidermal Growth Factor (EGF), able to induce epidermis proliferation and to elicit precocious eye disclosure and teeth eruption, establishing the "inverse" relationships between the proliferation and differentiation. These two biological effects induced by EGF were according to EGFR signaling is involved in a large array of cellular functions such as proliferation, survival, adhesion, migration and differentiation. This review is focused on the key role of growth factors signaling and their downstream effectors in physiological and in pathological phenomena, the authors highlight the governance of Growth factors during the EMT in cancer invasion.
  • Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2&gt;1 GeV2. I. ep→eπ+n

    Bosted, PE; Amaryan, MJ; Anefalos Pereira, S; Avakian, H; Badui, RA; Ball, J; Baltzell, NA; Battaglieri, M; Batourine, V; Bedlinskiy, I; Biselli, AS; Briscoe, WJ; Bültmann, S; Burkert, VD; Carman, DS; Celentano, A; Chandavar, S; Charles, G; Ciullo, G; Clark, L; Colaneri, L; Cole, PL; Contalbrigo, M; Crede, V; D'Angelo, A; De Vita, R; Deur, A; De Sanctis, E; Djalali, C; Dupre, R; Egiyan, H; El Alaoui, A; El Fassi, L; Elouadrhiri, L; Eugenio, P; Fanchini, E; Fedotov, G; Filippi, A; Fleming, JA; Forest, T; Fradi, A; Gevorgyan, N; Ghandilyan, Y; Gilfoyle, GP; Girod, FX; Gleason, C; Gohn, W; Golovatch, E; Gothe, RW; Griffioen, KA; Guidal, M; Hakobyan, H; Hattawy, M; Hicks, K; Holtrop, M; Hughes, SM; Ilieva, Y; Ireland, DG; Ishkhanov, BS; Isupov, EL; Jiang, H; Jo, HS; Joo, K; Joosten, S; Khachatryan, G; Khandaker, M; Kim, A; Kim, W; Klein, FJ; Koirala, S; Kubarovsky, V; Kuhn, SE; Lanza, L; Net, LA; Lenisa, P; Livingston, K; MacGregor, IJD; McCracken, ME; McKinnon, B; Meyer, CA; Mirazita, M; Mokeev, VI; Montgomery, RA; Munevar, E; Munoz Camacho, C; Murdoch, G; Nadel-Turonski, P; Niccolai, S; Osipenko, M; Ostrovidov, AI; Park, K; Pasyuk, E; Peng, P; Phelps, W; Pisano, S; Pogorelko, O; Price, JW; Prok, Y; Protopopescu, D; Puckett, AJR (2017-03-20)
    © 2017 American Physical Society. Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive π+ electroproduction reaction γ∗p→nπ+. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic range covered is 1.1<W<3 GeV and 1<Q2<6GeV2. Results were obtained for about 6000 bins in W, Q2, cos(θ∗), and φ∗. Except at forward angles, very large target-spin asymmetries are observed over the entire W region. Reasonable agreement is found with phenomenological fits to previous data for W<1.6 GeV, but very large differences are seen at higher values of W. A generalized parton distributions (GPD)-based model is in poor agreement with the data. When combined with cross-sectional measurements, the present results provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q2, for resonances with masses as high as 2.4 GeV.
  • Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2&gt;1 GeV2. II. ep→eπ0p TARGET and BEAM-TARGET SPIN .... II. ... P. E. BOSTED et al.

    Bosted, PE; Kim, A; Adhikari, KP; Adikaram, D; Akbar, Z; Amaryan, MJ; Anefalos Pereira, S; Avakian, H; Badui, RA; Ball, J; Balossino, I; Battaglieri, M; Bedlinskiy, I; Biselli, AS; Boiarinov, S; Briscoe, WJ; Brooks, WK; Bültmann, S; Burkert, VD; Cao, T; Carman, DS; Celentano, A; Chandavar, S; Charles, G; Chetry, T; Ciullo, G; Clark, L; Colaneri, L; Cole, PL; Contalbrigo, M; Cortes, O; Crede, V; D'Angelo, A; Dashyan, N; De Vita, R; De Sanctis, E; Deur, A; Djalali, C; Dupre, R; Egiyan, H; El Alaoui, A; El Fassi, L; Elouadrhiri, L; Eugenio, P; Fanchini, E; Fedotov, G; Fegan, S; Fersch, R; Filippi, A; Fleming, JA; Forest, TA; Fradi, A; Ghandilyan, Y; Gilfoyle, GP; Girod, FX; Glazier, DI; Gohn, W; Golovatch, E; Gothe, RW; Griffioen, KA; Guidal, M; Guler, N; Hakobyan, H; Guo, L; Hafidi, K; Hakobyan, H; Hanretty, C; Harrison, N; Hattawy, M; Heddle, D; Hicks, K; Hollis, G; Holtrop, M; Hughes, SM; Ireland, DG; Isupov, EL; Jenkins, D; Jiang, H; Jo, HS; Joo, K; Keller, D; Khachatryan, G; Khandaker, M; Kim, W; Klei, A; Klein, FJ; Koirala, S; Kubarovsky, V; Kuhn, SE; Lanza, L; Lenisa, P; Livingston, K; Lu, HY; MacGregor, IJD; Markov, N; Mayer, M; McCracken, ME; McKinnon, B; Mineeva, T; Mirazita, M (2017-03-20)
    © 2017 American Physical Society. Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive π0 electroproduction reaction γ∗p→pπ0, expanding an analysis of the γ∗p→nπ+ reaction from the same experiment. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic ranges covered are 1.1<W<3 GeV and 1<Q2<6 GeV2. Results were obtained for about 5700 bins in W, Q2, cos(θ∗), and φ∗. The beam-target asymmetries were found to generally be greater than zero, with relatively modest φ∗ dependence. The target asymmetries exhibit very strong φ∗ dependence, with a change in sign occurring between results at low W and high W, in contrast to π+ electroproduction. Reasonable agreement is found with phenomenological fits to previous data for W<1.6 GeV, but significant differences are seen at higher W. When combined with cross-sectional measurements, as well as π+ observables, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q2, for resonances with masses as high as 2.4 GeV.
  • Using analogy to learn about phenomena at scales outside human perception

    Resnick, I; Davatzes, A; Newcombe, NS; Shipley, TF (2017-12-01)
    © 2017, The Author(s). Understanding and reasoning about phenomena at scales outside human perception (for example, geologic time) is critical across science, technology, engineering, and mathematics. Thus, devising strong methods to support acquisition of reasoning at such scales is an important goal in science, technology, engineering, and mathematics education. In two experiments, we examine the use of analogical principles in learning about geologic time. Across both experiments we find that using a spatial analogy (for example, a time line) to make multiple alignments, and keeping all unrelated components of the analogy held constant (for example, keep the time line the same length), leads to better understanding of the magnitude of geologic time. Effective approaches also include hierarchically and progressively aligning scale information (Experiment 1) and active prediction in making alignments paired with immediate feedback (Experiments 1 and 2).
  • New Physics Searches from Nucleon Matrix Elements in Lattice QCD

    Constantinou, M (2017-03-22)
    © The Authors, published by EDP Sciences, 2017. In this paper we review recent progress in hadron structure using lattice QCD simulations, with main focus in the evaluation of nucleon matrix elements. We highlight developments that may guide new Physics searches, such as the scalar and tensor charges, as well as, the neutron electric dipole moment.
  • Characterization of Thin Film Materials using SCAN meta-GGA, an Accurate Nonempirical Density Functional

    Buda, IG; Lane, C; Barbiellini, B; Ruzsinszky, A; Sun, J; Bansil, A (2017-03-23)
    We discuss self-consistently obtained ground-state electronic properties of monolayers of graphene and a number of 'beyond graphene' compounds, including films of transition-metal dichalcogenides (TMDs), using the recently proposed strongly constrained and appropriately normed (SCAN) meta-generalized gradient approximation (meta-GGA) to the density functional theory. The SCAN meta-GGA results are compared with those based on the local density approximation (LDA) as well as the generalized gradient approximation (GGA). As expected, the GGA yields expanded lattices and softened bonds in relation to the LDA, but the SCAN meta-GGA systematically improves the agreement with experiment. Our study suggests the efficacy of the SCAN functional for accurate modeling of electronic structures of layered materials in high-Throughput calculations more generally.
  • Clinical application prospect of umbilical cord-derived mesenchymal stem cells on clearance of advanced glycation end products through autophagy on diabetic wound

    Han, Yanfu; Sun, Tianjun; Tao, Ran; Han, Yanqing; Liu, Jing; Tao, Rongjia|0000-0001-5058-4401 (2017-03-24)
    Nowadays, wound healing delay due to diabetes is considered to be closely related to the accumulation of advanced glycation end products (AGEs). Although mesenchymal stem cells (MSCs) exhibit positive effects on diabetic wound healing, related mechanisms are still not fully elucidated. It has been reported that MSCs can improve the activity of autophagy in injured tissues, thereby playing an important role in wound healing. The autophagy induced by MSCs may be beneficial to diabetic wound healing via removing AGEs, which provide new ideas for clinical treatment of diabetic wounds with the potential of broad application prospects. In this study, the current research situation and application prospect of umbilical cord-derived MSCs on the clearance of AGEs in diabetic wound were reviewed.
  • First measurement of unpolarized semi-inclusive deep-inelastic scattering cross sections from a He 3 target

    Yan, X; Allada, K; Aniol, K; Annand, JRM; Averett, T; Benmokhtar, F; Bertozzi, W; Bradshaw, PC; Bosted, P; Camsonne, A; Canan, M; Cates, GD; Chen, C; Chen, JP; Chen, W; Chirapatpimol, K; Chudakov, E; Cisbani, E; Cornejo, JC; Cusanno, F; Dalton, MM; Deconinck, W; de Jager, CW; De Leo, R; Deng, X; Deur, A; Ding, H; Dolph, PAM; Dutta, C; Dutta, D; El Fassi, L; Frullani, S; Gao, H; Garibaldi, F; Gaskell, D; Gilad, S; Gilman, R; Glamazdin, O; Golge, S; Guo, L; Hamilton, D; Hansen, O; Higinbotham, DW; Holmstrom, T; Huang, J; Huang, M; Ibrahim, HF; Iodice, M; Jiang, X; Jin, G; Jones, MK; Katich, J; Kelleher, A; Kim, W; Kolarkar, A; Korsch, W; Lerose, JJ; Li, X; Li, Y; Lindgren, R; Liu, T; Liyanage, N; Long, E; Lu, HJ; Margaziotis, DJ; Markowitz, P; Marrone, S; McNulty, D; Meziani, ZE; Michaels, R; Moffit, B; Muñoz Camacho, C; Nanda, S; Narayan, A; Nelyubin, V; Norum, B; Oh, Y; Osipenko, M; Parno, D; Peng, JC; Phillips, SK; Posik, M; Puckett, AJR; Qian, X; Qiang, Y; Rakhman, A; Ransome, R; Riordan, S; Saha, A; Sawatzky, B; Schulte, E; Shahinyan, A; Shabestari, MH; Širca, S; Stepanyan, S; Subedi, R; Sulkosky, V; Tang, LG; Tobias, WA; Urciuoli, GM (2017-03-24)
    © 2017 American Physical Society. The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in He3(e,e′π±)X have been measured for the first time in Jefferson Lab experiment E06-010 with a 5.9GeVe- beam on a He3 gas target. The experiment focuses on the valence quark region, covering a kinematic range 0.12<xbj<0.45,1<Q2<4(GeV/c)2,0.45<zh<0.65, and 0.05<Pt<0.55GeV/c. The extracted SIDIS differential cross sections of π± production are compared with existing phenomenological models while the He3 nucleus approximated as two protons and one neutron in a plane-wave picture, in multidimensional bins. Within the experimental uncertainties, the azimuthal modulations of the cross sections are found to be consistent with zero.
  • Gridless quadrature compressive sampling with interpolated array technique

    Xi, F; Chen, S; Zhang, YD; Liu, Z; Zhang, Yimin Daniel|0000-0002-4625-209X (2017-04-01)
    © 2016 Elsevier B.V. Quadrature compressive sampling (QuadCS) is a sub-Nyquist sampling scheme for acquiring in-phase and quadrature (I/Q) components in radar. In this scheme, the received intermediate frequency (IF) signals are expressed as a linear combination of time-delayed and scaled replicas of the transmitted waveforms. For sparse IF signals on discrete grids of time-delay space, the QuadCS can efficiently reconstruct the I/Q components from sub-Nyquist samples. In practice, the signals are characterized by a set of unknown time-delay parameters in a continuous space. Then conventional sparse signal reconstruction will deteriorate the QuadCS reconstruction performance. This paper focuses on the reconstruction of the I/Q components with continuous delay parameters. A parametric spectrum-matched dictionary is defined, which sparsely describes the IF signals in the frequency domain by delay parameters and gain coefficients, and the QuadCS system is reexamined under the new dictionary. With the inherent structure of the QuadCS system, it is found that the estimation of delay parameters can be decoupled from that of sparse gain coefficients, yielding a beamspace direction-of-arrival (DOA) estimation formulation with a time-varying beamforming matrix. Then an interpolated beamspace DOA method is developed to perform the DOA estimation. An optimal interpolated array is established and sufficient conditions to guarantee the successful estimation of the delay parameters are derived. With the estimated delays, the gain coefficients can be conveniently determined by solving a linear least-squares problem. Extensive simulation results evidently demonstrate the superiority of the proposed algorithms in achieving super-resolution time-delay estimation and high-accuracy sparse signal reconstruction.
  • Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment

    An, FP; Balantekin, AB; Band, HR; Bishai, M; Blyth, S; Cao, D; Cao, GF; Cao, J; Cen, WR; Chan, YL; Chang, JF; Chang, LC; Chang, Y; Chen, HS; Chen, QY; Chen, SM; Chen, YX; Chen, Y; Cheng, JH; Cheng, J; Cheng, YP; Cheng, ZK; Cherwinka, JJ; Chu, MC; Chukanov, A; Cummings, JP; De Arcos, J; Deng, ZY; Ding, XF; Ding, YY; Diwan, MV; Dolgareva, M; Dove, J; Dwyer, DA; Edwards, WR; Gill, R; Gonchar, M; Gong, GH; Gong, H; Grassi, M; Gu, WQ; Guan, MY; Guo, L; Guo, XH; Guo, YH; Guo, Z; Hackenburg, RW; Han, R; Hans, S; He, M; Heeger, KM; Heng, YK; Higuera, A; Hor, YK; Hsiung, YB; Hu, BZ; Hu, T; Hu, W; Huang, EC; Huang, HX; Huang, XT; Huber, P; Huo, W; Hussain, G; Jaffe, DE; Jaffke, P; Jen, KL; Jetter, S; Ji, XP; Ji, XL; Jiao, JB; Johnson, RA; Jones, D; Joshi, J; Kang, L; Kettell, SH; Kohn, S; Kramer, M; Kwan, KK; Kwok, MW; Kwok, T; Langford, TJ; Lau, K; Lebanowski, L; Lee, J; Lee, JHC; Lei, RT; Leitner, R; Leung, JKC; Li, C; Li, DJ; Li, F; Li, GS; Li, QJ; Li, S; Li, SC; Li, WD; Li, XN; Li, YF; Li, ZB (2017-04-01)
    © 2017 American Physical Society. A measurement of electron antineutrino oscillation by the Daya Bay Reactor Neutrino Experiment is described in detail. Six 2.9-GWth nuclear power reactors of the Daya Bay and Ling Ao nuclear power facilities served as intense sources of νe's. Comparison of the νe rate and energy spectrum measured by antineutrino detectors far from the nuclear reactors (∼1500-1950 m) relative to detectors near the reactors (∼350-600 m) allowed a precise measurement of νe disappearance. More than 2.5 million νe inverse beta-decay interactions were observed, based on the combination of 217 days of operation of six antineutrino detectors (December, 2011-July, 2012) with a subsequent 1013 days using the complete configuration of eight detectors (October, 2012-July, 2015). The νe rate observed at the far detectors relative to the near detectors showed a significant deficit, R=0.949±0.002(stat)±0.002(syst). The energy dependence of νe disappearance showed the distinct variation predicted by neutrino oscillation. Analysis using an approximation for the three-flavor oscillation probability yielded the flavor-mixing angle sin22θ13=0.0841±0.0027(stat)±0.0019(syst) and the effective neutrino mass-squared difference of |Δmee2|=(2.50±0.06(stat)±0.06(syst))×10-3 eV2. Analysis using the exact three-flavor probability found Δm322=(2.45±0.06(stat)±0.06(syst))×10-3 eV2 assuming the normal neutrino mass hierarchy and Δm322=(-2.56±0.06(stat)±0.06(syst))×10-3 eV2 for the inverted hierarchy.
  • Measurement of the cross section and longitudinal double-spin asymmetry for dijet production in polarized pp collisions at s =200 GeV

    Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Ajitanand, NN; Alekseev, I; Anderson, DM; Aoyama, R; Aparin, A; Arkhipkin, D; Aschenauer, EC; Ashraf, MU; Attri, A; Averichev, GS; Bai, X; Bairathi, V; Barish, K; Behera, A; Bellwied, R; Bhasin, A; Bhati, AK; Bhattarai, P; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Bouchet, J; Brandenburg, JD; Brandin, AV; Brown, D; Bunzarov, I; Butterworth, J; Caines, H; Calderón De La Barca Sánchez, M; Campbell, JM; Cebra, D; Chakaberia, I; Chaloupka, P; Chang, Z; Chankova-Bunzarova, N; Chatterjee, A; Chattopadhyay, S; Chen, X; Chen, X; Chen, JH; Cheng, J; Cherney, M; Christie, W; Contin, G; Crawford, HJ; Das, S; De Silva, LC; Debbe, RR; Dedovich, TG; Deng, J; Derevschikov, AA; Didenko, L; Dilks, C; Dong, X; Drachenberg, JL; Draper, JE; Dunkelberger, LE; Dunlop, JC; Efimov, LG; Elsey, N; Engelage, J; Eppley, G; Esha, R; Esumi, S; Evdokimov, O; Ewigleben, J; Eyser, O; Fatemi, R; Fazio, S; Federic, P; Federicova, P; Fedorisin, J; Feng, Z; Filip, P; Finch, E; Fisyak, Y; Flores, CE; Fujita, J; Fulek, L; Gagliardi, CA; Garand, D; Geurts, F; Gibson, A; Girard, M; Grosnick, D; Gunarathne, DS; Guo, Y; Gupta, S; Gupta, A; Guryn, W; Hamad, AI; Hamed, A; Harlenderova, A; Harris, JW (2017-04-01)
    © 2017 American Physical Society. We report the first measurement of the longitudinal double-spin asymmetry ALL for midrapidity dijet production in polarized pp collisions at a center-of-mass energy of s=200 GeV. The dijet cross section was measured and is shown to be consistent with next-to-leading order (NLO) perturbative QCD predictions. ALL results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent NLO global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-x>0.05.
  • Prognostic Significance of Interleukin-34 (IL-34) in Patients With Chronic Heart Failure With or Without Renal Insufficiency

    Tao, Rong; Fan, Qin; Zhang, Hang; Xie, Hongyang; Lu, Lin; Gu, Gang; Wang, Fang; Xi, Rui; Hu, Jian; Chen, Qiujing; Niu, Wenquan; Shen, Weifeng; Zhang, Ruiyan; Yan, Xiaoxiang; Tao, Rongjia|0000-0001-5058-4401 (2017-04)
    BACKGROUND: Renal dysfunction, commonly associated with cardiac dysfunction, has predictive value for adverse long-term outcomes in heart failure (HF). We previously identified a novel renal biomarker, interleukin-34 (IL-34), elevated in HF patients and associated with kidney dysfunction and coronary artery disease during HF. However, the prognostic value of IL-34 in HF remains unclear, so that the present study aimed to determine it. METHODS AND RESULTS: This prospective, observational study included 510 consecutive HF patients with their serum IL-34 as well as other variables measured at baseline, and they were followed up for 2 years. The primary end point was a composite of cardiovascular death or a first HF hospitalization, with cardiovascular death, HF hospitalization, and all-cause mortality as secondary outcomes. There was a significant and gradual increase in risk as IL-34 increased, determined by log-rank tests with Kaplan-Meier curves. Serum IL-34 was also a significant prognostic predictor of the primary end point (1.301 [1.115-1.518]; P=0.001), cardiovascular death (1.347 [1.096-1.655]; P=0.005), HF hospitalization (1.234 [1.018-1.494]; P=0.032), and all-cause mortality (1.343 [1.115-1.618]; P=0.002) in HF as per SD increase in the log IL-34 level after adjusting for age, sex, traditional risk factors, and N-terminal pro-brain natriuretic peptide. Especially, IL-34 had a more-significant prognostic value in HF patients with kidney impairment than those without. CONCLUSIONS: IL-34 is a significant predictor of cardiovascular death, HF hospitalization, and all-cause mortality in chronic HF, especially when concomitant with renal dysfunction. Serum IL-34 measurement may provide new insights linking kidney impairment to poor HF outcomes beyond other renal markers.
  • Recovery of an oxidized majorite inclusion from Earth's deep asthenosphere

    Xu, Cheng; Kynicky, Jindrich; Tao, Renbiao; Liu, Xi; Zhang, Lifei; Pohanka, Miroslav; Song, Wenlei; Fei, Yingwei; Tao, Rongjia|0000-0001-5058-4401 (2017-04)
    Minerals recovered from the deep mantle provide a rare glimpse into deep Earth processes. We report the first discovery of ferric iron-rich majoritic garnet found as inclusions in a host garnet within an eclogite xenolith originating in the deep mantle. The composition of the host garnet indicates an ultrahigh-pressure metamorphic origin, probably at a depth of ~200 km. More importantly, the ferric iron-rich majoritic garnet inclusions show a much deeper origin, at least at a depth of 380 km. The majoritic nature of the inclusions is confirmed by mineral chemistry, x-ray diffraction, and Raman spectroscopy, and their depth of origin is constrained by a new experimental calibration. The unique relationship between the majoritic inclusions and their host garnet has important implications for mantle dynamics within the deep asthenosphere. The high ferric iron content of the inclusions provides insights into the oxidation state of the deep upper mantle.

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