Now showing items 1713-1732 of 5032

    • Hall and field-effect mobilities in few layeredᅠp-WSe2ᅠfield-effect transistors 

      (2015)
      Here, we present a temperature (T) dependent comparison between field-effect and Hall mobilities in field-effect transistors based on few-layered WSe2 exfoliated onto SiO2. Without dielectric engineering and beyond a T-dependent threshold gate-voltage, we observe maximum hole mobilities approaching 350 cm(2)/Vs at T = 300 K. The hole Hall mobility ...
    • Hall effect in gated single-wall carbon nanotube films 

      Yomogida, Yohei; Horiuchi, Kanako; Okada, Ryotaro; Kawai, Hideki; Ichinose, Yota; (2022)
      The presence of hopping carriers and grain boundaries can sometimes lead to anomalous carrier types and density overestimation in Hall-effect measurements. Previous Hall-effect studies on carbon nanotube films reported unreasonably large carrier densities without independent assessments of the carrier types and densities. Here, we have systematically ...
    • Handle Addition for Doubly-Periodic Scherk Surfaces 

      (2012)
      We prove the existence of a family of embedded doubly periodic minimal surfaces of (quotient) genus g with orthogonal ends that generalizes the classical doubly periodic surface of Scherk and the genus-one Scherk surface of Karcher. The proof of the family of immersed surfaces is by induction on genus, while the proof of embeddedness is by the ...
    • Hands-On Training Courses for Cervical Cancer Screening, Diagnosis, and Treatment Procedures in Low- and Middle-Income Countries 

      Phoolcharoen, Natacha; Varon, Melissa Lopez; Baker, Ellen; Parra, Sonia; Carns, Jennifer; (2022)
      In 2018, there were approximately 570,000 new cases of cervical cancer worldwide. More than 85% of cases occurred in low- and middle-income countries (LMICs), primarily because of poor access to screening and a limited number of medical providers trained to diagnose and treat cervical precancerous lesions. Our objective was to provide locally arranged, ...
    • The Harang reversal and the interchange stability of the magnetotail 

      Ohtani, Shinichi; Gkioulidou, Matina; Wang, Chih-Ping; Wolf, Richard A. (2016)
      The present study addresses steady convection in the plasma sheet in terms of the interchange stability with special attention to the Harang reversal. The closure of the tail current with a field-aligned current (FAC) results from the divergence/convergence of the pressure gradient current. If the magnetotail is in a steady state, the associated ...
    • Hard X-Ray Constraints on Small-scale Coronal Heating Events 

      Marsh, Andrew J.; Smith, David M.; Glesener, Lindsay; Klimchuk, James A.; Bradshaw, Stephen J.; (2018)
      Much evidence suggests that the solar corona is heated impulsively, meaning that nanoflares may be ubiquitous in quiet and active regions (ARs). Hard X-ray (HXR) observations with unprecedented sensitivity >3 keV are now enabled by focusing instruments. We analyzed data from the Focusing Optics X-ray Solar Imager (FOXSI) rocket and the Nuclear ...
    • Hard X-ray quiescent emission in magnetars via resonant Compton upscattering 

      Baring, M.G.; Wadiasingh, Z.; Gonthier, P.L.; Harding, A.K. (2017)
      Non-thermal quiescent X-ray emission extending between 10 keV and around 150 keV has been seen in about 10 magnetars by RXTE, INTEGRAL, Suzaku, NuSTAR and Fermi-GBM. For inner magnetospheric models of such hard X-ray signals, inverse Compton scattering is anticipated to be the most efficient process for generating the continuum radiation, because the ...
    • Harmonic decomposition of three-particle azimuthal correlations at energies available at the BNL Relativistic Heavy Ion Collider 

      STAR Collaboration; Brandenburg, J.D.; Butterworth, J.; Eppley, G.; Geurts, F.; (2018)
      We present measurements of three-particle correlations for various harmonics in Au+Au collisions at energies ranging from √sNN=7.7 to 200 GeV using the STAR detector. The quantity ⟨cos(mϕ1+nϕ2−(m+n)ϕ3)⟩, with ϕ being the azimuthal angles of the particles is evaluated as a function of √sNN, collision centrality, transverse momentum, pT, pseudorapidity ...
    • Harnessing the power of antibodies to fight bone metastasis 

      Tian, Zeru; Wu, Ling; Yu, Chenfei; Chen, Yuda; Xu, Zhan; (2021)
      Antibody-based therapies have proved to be of great value in cancer treatment. Despite the clinical success of these biopharmaceuticals, reaching targets in the bone microenvironment has proved to be difficult due to the relatively low vascularization of bone tissue and the presence of physical barriers. Here, we have used an innovative bone-targeting ...
    • Hartree–Fock symmetry breaking around conical intersections 

      Jake, Lena C.; Henderson, Thomas M.; Scuseria, Gustavo E. (2018)
      We study the behavior of Hartree-Fock (HF) solutions in the vicinity of conical intersections. These are here understood as regions of a molecular potential energy surface characterized by degenerate or nearly degenerate eigenfunctions with identical quantum numbers (point group, spin, and electron numbers). Accidental degeneracies between states ...
    • HCN ppt-level detection based on a QEPAS sensor with amplified laser and a miniaturized 3D-printed photoacoustic detection channel 

      He, Ying; Ma, Yufei; Tong, Yao; Yu, Xin; Tittel, Frank K. (2018)
      Ultra-high sensitive and stable detection of hydrogen cyanide (HCN) based on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor was realized using an erbium-doped fiber amplifier (EDFA) as well as a miniaturized 3D-printed photoacoustic detection channel (PADC) for the first time. A HCN molecule absorption line located at 6536.46 cm-1 was ...
    • Health Literacy, Smoking, and Health Indicators in African American Adults 

      Stewart, Diana W.; Vidrine, Jennifer I.; Shete, Sanjay; Spears, Claire A.; Cano, Miguel A.; (2015)
      We examined cross-sectional associations of health literacy (HL) with smoking and other established health indicators among 1,467 African American adults. Data emanated from a longitudinal cohort study designed to investigate cancer risk factors among church-going African American adults. We conducted linear and logistic regression analyses to assess ...
    • Health-Related Physical Fitness and Activity in Homeschool: A Systematic Review With Implications for Return to Public School 

      Kabiri, Laura S.; Messineo, Ashley; Gattu, Nikhil; Ray, Brian D.; Iammarino, Nicholas K. (2021)
      BACKGROUND: The purpose of this systematic review is to summarize what is known about health-related physical fitness (cardiovascular endurance, muscular strength and endurance, flexibility, and body composition) and physical activity among homeschool youth. Findings from this study have implications for all American youth as they return to public ...
    • Heat shock factor 1 (HSF1) cooperates with estrogen receptor α (ERα) in the regulation of estrogen action in breast cancer cells 

      Vydra, Natalia; Janus, Patryk; Kus, Paweł; Stokowy, Tomasz; Mrowiec, Katarzyna; (2021)
      Heat shock factor 1 (HSF1), a key regulator of transcriptional responses to proteotoxic stress, was linked to estrogen (E2) signaling through estrogen receptor α (ERα). We found that an HSF1 deficiency may decrease ERα level, attenuate the mitogenic action of E2, counteract E2-stimulated cell scattering, and reduce adhesion to collagens and cell ...
    • Heaven and Health: How Black, Latino, and Korean Christians View the Relationship Between Faith and Health 

      Bolger, Daniel; Tinsley, Cleve IV; Ecklund, Elaine Howard (2018)
      Religious congregations have increasingly been viewed as potential access points to health care in underserved communities. Such a perspective stems from a robust literature identifying the unique civic role that churches potentially play in African American and Latino communities. Yet, research on congregational health promotion has often not ...
    • Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ(As1−xPx)2 

      Chen, Jian; Wang, Zhen; Li, Yupeng; Feng, Chunmu; Dai, Jianhui; (2019)
      We study the quantum phase transitions in the nickel pnctides, CeNi2−δ(As1−xPx)2 (δ ≈ 0.07–0.22) polycrystalline samples. This series displays the distinct heavy fermion behavior in the rarely studied parameter regime of dilute carrier limit. We systematically investigate the magnetization, specific heat and electrical transport down to low temperatures. ...
    • Heavy oil viscosity reduction at mild temperatures using palladium acetylacetonate 

      Xu, Yan; Heck, Kimberly N.; Ayala-Orozco, Ciceron; Arredondo, Jacob H.; Zenor, William; (2021)
      Metal-ligand compounds (“MLCs”) have been shown to reduce heavy oil viscosity and upgrade oil quality. However, MLCs generally require high treatment temperatures (around 250 °C), which is undesirably energy-intensive. We identified palladium(II) acetylacetonate (“PdA”) as a model MLC that can operate at mild temperatures (<200 °C). We studied its ...
    • Heavy-fermion quantum criticality and destruction of the Kondo effect in a nickelᅠoxypnictide 

      Luo, Yongkang; Pourovskii, Leonid; Rowley, S.E.; Li, Yuke; Feng, Chunmu; (2014)
      A quantum critical point arises at a continuous transformation between distinct phases of matter at zero temperature. Studies in antiferromagnetic heavy-fermion materials have revealed that quantum criticality has several classes, with an unconventional type that involves a critical destruction of the Kondo entanglement [1,2]. To understand such ...
    • Heavy-tailed densities 

      Rojo, Javier (2013)
      The concept of heavy- or long-tailed densities (or distributions) has attracted much well-deserved attention in the literature. A quick search in Google using the keywords long-tailed statistics retrieves almost 12 million items. The concept has become a pillar of the theory of extremes, and through its connection with outlier-prone distributions, ...