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Trinkle DR, Hennig RG, Srinivasan SG, Hatch DM, Jones MD, Stokes HT, Albers RC, Wilkins JW. New mechanism for the alpha to omega martensitic transformation in pure titanium. Phys Rev Lett 2003; 91:025701. [PMID: 12906490 DOI: 10.1103/physrevlett.91.025701] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2003] [Indexed: 05/24/2023]
Abstract
We propose a new direct mechanism for the pressure driven alpha-->omega martensitic transformation in pure titanium. A systematic algorithm enumerates all possible pathways whose energy barriers are evaluated. A new, homogeneous pathway emerges with a barrier at least 4 times lower than other pathways. The pathway is shown to be favorable in any nucleation model.
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Affiliation(s)
- D R Trinkle
- The Ohio State University, Columbus, Ohio 43210, USA
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2
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Abstract
The coupling between Bloch oscillating electrons and longitudinal optical phonons in a superlattice leads to resonant phonon excitation but no gap in the Bloch-phonon spectrum. In addition, we predict a sharp transition from plasma to Bloch oscillations at nu(B) = 2nu(P). From a microscopic description with phenomenological dampings, we numerically map out the behavior of coupled Bloch-plasmon-phonon modes for a wide range of parameters, and mimic experimental conditions. Our results are in good agreement with recent experiments by Dekorsy et al. [Phys. Rev. Lett. 85, 1080 (2000)].
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Affiliation(s)
- AW Ghosh
- Department of Physics, The Ohio State University, 174 West 18th Avenue, Columbus, Ohio 43210, USA
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Kim J, Kirchhoff F, Wilkins JW, Khan FS. Stability of Si-interstitial defects: from point to extended defects. Phys Rev Lett 2000; 84:503-506. [PMID: 11015949 DOI: 10.1103/physrevlett.84.503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/1999] [Indexed: 05/23/2023]
Abstract
Trends in the growth of extended interstitial defects are extracted from extensive tight-binding and ab inito local density approximation simulations. With an increasing number of interstitials, the stable defect shape evolves from compact to chainlike to rodlike. The rodlike 311 defect, formed from (011) interstitial chains, is stabilized as it grows, elongating in the chain direction. Accurate parametrization of the defect-formation energy on the number of interstitials and interstitial chains, together with the anisotropy of the interstitial capture radius, enables macroscopic defect-growth simulations.
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Affiliation(s)
- J Kim
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
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Hamby SL, Bardi CA, Wilkins JW. Neuropsychological assessment of relatively intact individuals: Psychometric lessons from an HIV+ sample. Arch Clin Neuropsychol 1997. [DOI: 10.1093/arclin/12.6.545] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Hamby SL, Albert Bardi C, Wilkins JW. Neuropsychological assessment of relatively intact individuals: pychometric lessons from an HIV+ sample. Arch Clin Neuropsychol 1997; 12:545-56. [PMID: 14590666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
The assessment of relatively intact individuals poses special problems for neuropsychologists, because fine discriminations are often needed to identify subtle deficits or gradual declines in performance. Many neuropsychological tests, however, are not well-suited for making such exact discriminations. 117 HIV+ individuals were administered 26 different neuropsychological tests that produce 48 scores. Measures of skewness and kurtosis were used to identify nonnormal sampling distributions. While many tests showed good sampling distributions, several demonstrated ceiling effects and other restrictions of range. This included some tests, such as Boston Naming and Lafayette Grooved Pegboard, that are not ordinarily considered screening instruments. Such nonnormal distributions distort the interpretation of clinical and research data, and indicate a need to use tests that are suited to the abilities of the population being assessed.
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Affiliation(s)
- S L Hamby
- AIDS Neurologic Center and Department of Psychology, University of North Carolina, USA
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6
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Aulbur WG, Jönsson L, Wilkins JW. Polarization-dependent density-functional theory and quasiparticle theory: Optical response beyond local-density approximations. Phys Rev B Condens Matter 1996; 54:8540-8550. [PMID: 9984529 DOI: 10.1103/physrevb.54.8540] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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7
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Sergeev A, Reizer M, Wilkins JW. Renormalization of the Drude conductivity by the electron-phonon interaction. Phys Rev Lett 1996; 76:2374-2377. [PMID: 10060681 DOI: 10.1103/physrevlett.76.2374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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8
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Hyldgaard P, Wilkins JW. Electron-electron scattering in far-infrared quantum cascade lasers. Phys Rev B Condens Matter 1996; 53:6889-6892. [PMID: 9982114 DOI: 10.1103/physrevb.53.6889] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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9
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Jönsson L, Levine ZH, Wilkins JW. Large local-field corrections in optical rotatory power of quartz and selenium. Phys Rev Lett 1996; 76:1372-1375. [PMID: 10061704 DOI: 10.1103/physrevlett.76.1372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Silva JB, Lima WL, Oliveira WC, Mello JL, Oliveira LN, Wilkins JW. Particle-hole asymmetry in the two-impurity Kondo model. Phys Rev Lett 1996; 76:275-278. [PMID: 10061060 DOI: 10.1103/physrevlett.76.275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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11
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Kim J, Yeh ML, Khan FS, Wilkins JW. Surface phonons of the Si(111)-7 x 7 reconstructed surface. Phys Rev B Condens Matter 1995; 52:14709-14718. [PMID: 9980808 DOI: 10.1103/physrevb.52.14709] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Davies JH, Egues JC, Wilkins JW. Effect of incoherence on current and shot noise in resonant tunneling: An exactly solvable model. Phys Rev B Condens Matter 1995; 52:11259-11265. [PMID: 9980228 DOI: 10.1103/physrevb.52.11259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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13
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Anisimov VI, Albers RC, Wills JM, Alouani M, Wilkins JW. Prediction of an undimerized, insulating, antiferromagnetic ground state in halogen-bridged linear-chain Ni compounds. Phys Rev B Condens Matter 1995; 52:R6975-R6978. [PMID: 9979728 DOI: 10.1103/physrevb.52.r6975] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Aulbur WG, Levine ZH, Wilkins JW, Allan DC. Small calculated second-harmonic generation in Si1Ge1. Phys Rev B Condens Matter 1995; 51:10691-10700. [PMID: 9977764 DOI: 10.1103/physrevb.51.10691] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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16
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Smith RA, Reizer MY, Wilkins JW. Suppression of the order parameter in homogeneous disordered superconductors. Phys Rev B Condens Matter 1995; 51:6470-6492. [PMID: 9977183 DOI: 10.1103/physrevb.51.6470] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Alouani M, Wilkins JW, Albers RC, Wills JM. Alouani et al. Reply. Phys Rev Lett 1994; 73:3599. [PMID: 10057426 DOI: 10.1103/physrevlett.73.3599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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18
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Chen J, Levine ZH, Wilkins JW. Linear and nonlinear optical properties of four polytypes of SiC. Phys Rev B Condens Matter 1994; 50:11514-11519. [PMID: 9975281 DOI: 10.1103/physrevb.50.11514] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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19
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Egues JC, Hershfield S, Wilkins JW. Zero-frequency shot noise for tunneling through a system with internal scattering. Phys Rev B Condens Matter 1994; 49:13517-13527. [PMID: 10010288 DOI: 10.1103/physrevb.49.13517] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Kim K, McKenzie RH, Wilkins JW. Universal subgap optical conductivity in quasi-one-dimensional Peierls systems. Phys Rev Lett 1993; 71:4015-4018. [PMID: 10055132 DOI: 10.1103/physrevlett.71.4015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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21
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Alouani M, Wilkins JW, Albers RC, Wills JM. Tuning of the charge-density wave in the halogen-bridged transition-metal linear-chain compounds. Phys Rev Lett 1993; 71:1415-1418. [PMID: 10055534 DOI: 10.1103/physrevlett.71.1415] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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22
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Robertson KR, Stern RA, Hall CD, Perkins DO, Wilkins JW, Gortner DT, Donovan MK, Messenheimer JA, Whaley R, Evans DL. Vitamin B12 deficiency and nervous system disease in HIV infection. Arch Neurol 1993; 50:807-11. [PMID: 8352665 DOI: 10.1001/archneur.1993.00540080018007] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND Vitamin B12 deficiency may result in a number of neurological and neuropsychiatric disorders. Patients with human immunodeficiency virus type 1 (HIV-1) infection may have a high rate of vitamin B12 deficiency and nervous system disease. Vitamin B12 deficiency may contribute to neurological disease in HIV-1-infected individuals. OBJECTIVE To evaluate the possible contribution of vitamin B12 deficiency to neurological disease in HIV-1-infected individuals. MAIN OUTCOME MEASURES Comparison of serum vitamin B12 levels with neurological, neuropsychological, and mood state abnormalities in 153 HIV-1-positive subjects and 57 high-risk seronegative controls. A subgroup of 67 subjects underwent additional extensive clinical neurophysiological, cerebrospinal fluid, and magnetic resonance imaging evaluations. RESULTS No statistically significant relationships were noted between vitamin B12 levels and abnormalities on any of the measures examined. CONCLUSIONS This study does not indicate an important role for vitamin B12 deficiency in the neurological disease of HIV-1 infection.
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Affiliation(s)
- K R Robertson
- AIDS Neurological Center, University of North Carolina, Chapel Hill 27599-7025
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Zhong H, Levine ZH, Allan DC, Wilkins JW. Band-theoretic calculations of the optical-activity tensor of alpha -quartz and trigonal Se. Phys Rev B Condens Matter 1993; 48:1384-1403. [PMID: 10008499 DOI: 10.1103/physrevb.48.1384] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Davies JH, Hershfield S, Hyldgaard P, Wilkins JW. Current and rate equation for resonant tunneling. Phys Rev B Condens Matter 1993; 47:4603-4618. [PMID: 10006608 DOI: 10.1103/physrevb.47.4603] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Hershfield S, Davies JH, Hyldgaard P, Stanton CJ, Wilkins JW. Zero-frequency current noise for the double-tunnel-junction Coulomb blockade. Phys Rev B Condens Matter 1993; 47:1967-1979. [PMID: 10006233 DOI: 10.1103/physrevb.47.1967] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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26
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Wei S, Allan DC, Wilkins JW. Elastic constants of a Si/Ge superlattice and of bulk Si and Ge. Phys Rev B Condens Matter 1992; 46:12411-12420. [PMID: 10003157 DOI: 10.1103/physrevb.46.12411] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Davies JH, Hyldgaard P, Hershfield S, Wilkins JW. Classical theory for shot noise in resonant tunneling. Phys Rev B Condens Matter 1992; 46:9620-9633. [PMID: 10002773 DOI: 10.1103/physrevb.46.9620] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hershfield S, Davies JH, Wilkins JW. Resonant tunneling through an Anderson impurity. I. Current in the symmetric model. Phys Rev B Condens Matter 1992; 46:7046-7060. [PMID: 10002411 DOI: 10.1103/physrevb.46.7046] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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30
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McKenzie RH, Wilkins JW. Effect of lattice zero-point motion on electronic properties of the Peierls-Fröhlich state. Phys Rev Lett 1992; 69:1085-1088. [PMID: 10047119 DOI: 10.1103/physrevlett.69.1085] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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31
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Zhong H, Levine ZH, Allan DC, Wilkins JW. Optical activity of selenium: A nearly first-principles calculation. Phys Rev Lett 1992; 69:379-382. [PMID: 10046658 DOI: 10.1103/physrevlett.69.379] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Hall CD, Snyder CR, Robertson KR, Messenheimer JA, Wilkins JW, Robertson WT, Whaley RA, Van der Horst C, Silverman LM. Cerebrospinal fluid analysis in human immunodeficiency virus infection. Ann Clin Lab Sci 1992; 22:139-43. [PMID: 1354427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Cerebrospinal fluid (CSF) analytes were evaluated in 59 human immunodeficiency virus (HIV+) individuals to assess neurological involvement. Glucose, total protein, cell counts, p24 antigen, CSF: serum albumin/IgG ratios, and oligoclonal bands were measured. Eighty percent of samples showed abnormalities in one or more analyte. In some patients samples, these abnormalities could mimic those of secondary opportunistic infection when none was present. The presence of oligoclonal banding in CSF (31 percent) and disturbances in CSF: serum albumin/IgG ratio (30 percent) were related to decreases in serum CD4+ lymphocytes. Disturbances in CSF: Serum albumin/IgG ratio were also related to severity of non-neurological HIV disease staging. Cerebrospinal fluid oligoclonal bands were distinct from that found in serum in the same subjects. Since immune complexes between immunoglobulins and enzymes are observed in these same patients, these oligoclonal bands may result in artifactually elevated enzyme results secondary to decreased clearance leading to erroneous clinical decisions. There was no significant relationship between any abnormalities and the presence of neurologic disease as established by a wide variety of other studies. It is important to recognize the limits of CSF interpretation in this patient group.
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Affiliation(s)
- C D Hall
- Department of Neurology, University of North Carolina, Chapel Hill 27599-7025
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Messenheimer JA, Robertson KR, Wilkins JW, Kalkowski JC, Hall CD. Event-related potentials in human immunodeficiency virus infection. A prospective study. Arch Neurol 1992; 49:396-400. [PMID: 1558522 DOI: 10.1001/archneur.1992.00530280086027] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
P3 event-related evoked potentials (ERP) were recorded from 47 human immunodeficiency virus (HIV)-positive subjects examined twice and 29 HIV-positive subjects examined three times at 6-month intervals. The P3 latency significantly increased over time for asymptomatic subjects and subjects with acquired immunodeficiency syndrome (AIDS) and AIDS-related complex. N2 latency was prolonged relative to control values in both HIV-positive groups but did not increase with time. The P3 latency correlated with neuropsychologic measures of motor control and speed of mental processing. Confounding factors (active or previous substance abuse, developmental disabilities, and history of closed head injury or epilepsy) did not significantly affect ERP latencies. Endogenous ERP components are frequently abnormal in HIV-positive subjects and the P3 latency progressively increases over time. Continued follow-up is required to determine the clinical utility of ERP studies in the HIV-positive population.
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Affiliation(s)
- J A Messenheimer
- Department of Neurology, AIDS Neurologic Center, University of North Carolina, Chapel Hill 27599
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Levine ZH, Zhong H, Wei S, Allan DC, Wilkins JW. Strained silicon: A dielectric-response calculation. Phys Rev B Condens Matter 1992; 45:4131-4140. [PMID: 10002025 DOI: 10.1103/physrevb.45.4131] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hershfield S, Davies JH, Wilkins JW. Probing the Kondo resonance by resonant tunneling through an Anderson impurity. Phys Rev Lett 1991; 67:3720-3723. [PMID: 10044808 DOI: 10.1103/physrevlett.67.3720] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Hall CD, Snyder CR, Messenheimer JA, Wilkins JW, Robertson WT, Whaley RA, Robertson KR. Peripheral neuropathy in a cohort of human immunodeficiency virus-infected patients. Incidence and relationship to other nervous system dysfunction. Arch Neurol 1991; 48:1273-4. [PMID: 1668978 DOI: 10.1001/archneur.1991.00530240077026] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A cohort of 94 patients infected with human immunodeficiency virus was evaluated clinically and electrophysiologically for the presence of peripheral neuropathy, and the results were compared with evaluations of central nervous system function. Thirty-two (34%) had some degree of peripheral neuropathy; 18 (19%) (six [12%] of the 49 asymptomatic patients, five [45%] of the 11 patients with acquired immunodeficiency syndrome [AIDS], and seven [21%] of the 34 patients with AIDS-related complex) had neuropathy on clinical examination; and 21 (23%) (eight [16%] asymptomatic, four [36%] AIDS, and nine [26%] AIDS-related complex) had neuropathy on electrophysiologic evaluation. There was a significant correlation between the presence of neuropathy and evidence of central nervous system dysfunction.
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Affiliation(s)
- C D Hall
- AIDS Neurologic Center, University of North Carolina School of Medicine, Chapel Hill 27599-7025
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Hu BY, Stanton CJ, Wilkins JW. Acoustic mode with time-dependent phase velocity in photoexcited semiconductors. Phys Rev B Condens Matter 1991; 44:11067-11071. [PMID: 9999225 DOI: 10.1103/physrevb.44.11067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hu BY, Wilkins JW. Two-stream instabilities in solid-state plasmas caused by conventional and unconventional mechanisms. Phys Rev B Condens Matter 1991; 43:14009-14029. [PMID: 9997270 DOI: 10.1103/physrevb.43.14009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wilkins JW, Robertson KR, Snyder CR, Robertson WK, van der Horst C, Hall CD. Implications of self-reported cognitive and motor dysfunction in HIV-positive patients. Am J Psychiatry 1991; 148:641-3. [PMID: 2018167 DOI: 10.1176/ajp.148.5.641] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The authors examined HIV-positive subjects to determine the relationship of patient complaints of cognitive and motor dysfunction to psychiatric status and performance on established cognitive and motor function tests. METHOD HIV-positive volunteers (N = 77) were evaluated at entry into a longitudinal neurological study. Forty were asymptomatic, 29 had AIDS-related complex, and eight had AIDS. The subjects were not selected for the presence or absence of cognitive or motor complaints. Complaints of cognitive and motor dysfunction were assessed with items from the AIDS Clinical Trials Group Macro Neurologic Exam. Current depression and anxiety were assessed with the Profile of Mood States. Psychiatric status was assessed with the NIMH Diagnostic Interview Schedule, a structured interview that provides DSM-III psychiatric diagnoses. Actual cognitive and motor performance was measured with standard neuropsychological tests known to be sensitive to the effects of HIV. RESULTS Cognitive complaints were found in 38 (49%) of the subjects. These complaints were associated with psychiatric symptoms but not with cognitive performance. Motor complaints, found in 12 (16%) of the subjects, were associated with poorer motor performance but not with psychiatric symptoms. The overall frequency of psychiatric diagnosis was high. CONCLUSIONS Self-reports of cognitive and motor dysfunction were common in this unselected group and are of concern to health care providers. Potentially treatable psychiatric conditions were also common, particularly in subjects with cognitive complaints, and appropriate treatment referrals are indicated. Patients who report motor dysfunction should be neurologically evaluated for treatable causes.
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Affiliation(s)
- J W Wilkins
- AIDS Neurologic Center, School of Medicine, University of North Carolina, Chapel Hill
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Zhong H, Levine ZH, Wilkins JW. Linear polarizability calculation for rare-gas atoms in the time-dependent local-density approximation with a scissors operator. Phys Rev A 1991; 43:4629-4636. [PMID: 9905579 DOI: 10.1103/physreva.43.4629] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Lipavsk P, Khan FS, Wilkins JW. High-field transport in semiconductors. III. Wave-function renormalization. Phys Rev B Condens Matter 1991; 43:6665-6681. [PMID: 9998109 DOI: 10.1103/physrevb.43.6665] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lipavsk P, Khan FS, Kalvová A, Wilkins JW. High-field transport in semiconductors. II. Collision duration time. Phys Rev B Condens Matter 1991; 43:6650-6664. [PMID: 9998108 DOI: 10.1103/physrevb.43.6650] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bonesteel NE, Wilkins JW. Variational Monte Carlo calculations for the t'-J model with Fermi holes and boson spins. Phys Rev Lett 1991; 66:1232-1235. [PMID: 10044029 DOI: 10.1103/physrevlett.66.1232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Lipavsk P, Khan FS, Abdolsalami F, Wilkins JW. High-field transport in semiconductors. I. Absence of the intra-collisional-field effect. Phys Rev B Condens Matter 1991; 43:4885-4896. [PMID: 9997861 DOI: 10.1103/physrevb.43.4885] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kang MH, Wilkins JW. H-H interaction in Ti lattice: Pseudopotential density-functional total-energy approach. Phys Rev B Condens Matter 1990; 41:10182-10184. [PMID: 9993406 DOI: 10.1103/physrevb.41.10182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hu BY, Wilkins JW. Universal features in degenerate and nondegenerate hot-carrier screening. Phys Rev B Condens Matter 1990; 41:10706-10720. [PMID: 9993479 DOI: 10.1103/physrevb.41.10706] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dorsey AT, Jacobsen KW, Levine ZH, Wilkins JW. Analytic approach to charge transfer during atom-surface scattering. Phys Rev B Condens Matter 1989; 40:3417-3420. [PMID: 9992297 DOI: 10.1103/physrevb.40.3417] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hu BY, Sarker SK, Wilkins JW. Quantum kinetic-equation approach to semiconductor hot-carrier screening. Phys Rev B Condens Matter 1989; 39:8468-8475. [PMID: 9947560 DOI: 10.1103/physrevb.39.8468] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hu BY, Wilkins JW. Hot-carrier screening in semiconductors: A Boltzmann-equation approach. Phys Rev B Condens Matter 1989; 39:8464-8467. [PMID: 9947559 DOI: 10.1103/physrevb.39.8464] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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