bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reengineering the performance appraisal
Authors: Findley Henry M. , Amsler Gordon M. , Ingram Earl 
Published: July 2007

AbstractSupporters of total quality management often argue that the performance appraisal should no longer be used because it inhibits cooperative behavior. Others contend that the appraisal is too hard to implement. This article shows, however, that there are important reasons for retaining the appraisal as a key instrument in managing employee performance. Rather than dismantling their performance assessment systems, most organizations would do well to revamp them to ensure accuracy and fairness. © 1999 John Wiley & Sons, Inc.
Activities of daily living among St Petersburg women after mild stroke
Authors: Johansson Ann , Mishina Ekaterina , Ivanov Andrey , Björklund Anita 
Published: July 2007

AbstractThe aim of the present study was to determine how women living in St Petersburg, Russia, who have had a mild stroke, describe their performance in activities of daily living (ADL) and to elicit possible causes of their occupational dysfunction. Thirty‐six women who had experienced a mild stroke and been referred to a rehabilitation centre participated in the study. Data collection was conducted through interviews, including the ‘ADL Staircase’ and a modified ‘Frenchay Activities Index for Stroke Patients’. Additional data were collected through field notes and information from team members and relatives. The results showed that women who have had a mild stroke and ADL limitations experience occupational dysfunction in ADL that is most often caused by a combination of overprotection from relatives, the women's own feelings of anxiety and insecurity, and an overemphasizing of their disability. The results are limited, based on the small sample and restricted geographic area. There is a need to further investigate how individuals who have had a mild stroke can be physically and socially rehabilitated and reintegrated into the community in countries with developing economies such as Russia. Copyright © 2007 John Wiley & Sons, Ltd.
Unexplained elevated maternal serum β‐HCG concentration and adverse pregnancy outcome
Authors: Ganapathy Ramesh , Lamont Ronald F. , Bassett Paul 
Published: July 2007

AbstractObjectiveTo investigate the association between unexplained elevated maternal serum β‐Human chorionic gonadotrophin (HCG) in the second trimester of pregnancy and adverse pregnancy outcome.MethodsIn a case‐controlled study of 3463 women who opted for second‐trimester serum screening for Down syndrome, 142 were found to have a serum β‐HCG of ≥3.5 multiples of the median (MoM), 56 of whom had a serum β‐HCG of ≥5.0 MoM. These women were compared with a control group of women with serum β‐HCG within the 95% confidence interval around the median.ResultsIn the elevated β‐HCG group (≥5 MoM) significantly more babies required admission to the special care baby unit (p = 0.02) and were small for gestational age (SGA) (p = 0.03). The mean birth weight was also significantly lower in the group with elevated β‐HCG. Women with a serum β‐HCG of ≥5, ≥6, ≥7 or ≥8 MoM were associated with SGA babies in 40, 44, 64 and 86% respectively. All babies born to the six women with β‐HCG of 8.75–24.1 MoM were SGA.ConclusionIncreased surveillance is necessary in pregnancies where the maternal serum β‐HCG in the second trimester is inexplicably elevated to ≥5 MoM. Copyright © 2007 John Wiley & Sons, Ltd.
Comparison of lung proteome profiles in two rodent models of pulmonary arterial hypertension
Authors: Laudi Sven , Steudel Wolfgang , Jonscher Karen , Schöning Wenzel , Schniedewind Björn , Kaisers Udo , Christians Uwe , Trump Saskia 
Published: July 2007

AbstractWe studied the lung proteome changes in two widely used models of pulmonary arterial hypertension (PAH): monocrotaline (MCT) injection and chronic hypoxia (CH); untreated rats were used as controls (n = 6/group). After 28 days, invasive right ventricular systolic pressure (RVSP) was measured. Lungs were immunostained for α‐smooth muscle actin (αSMA). 2‐DE (n = 4/group) followed by nano‐LC‐MS/MS was applied for protein identification. Western blotting was used additionally if possible. RVSP was significantly increased in MCT‐ and CH‐rats (MCT 62.5 ± 4.4 mmHg, CH 62.2 ± 4.1 mmHg, control 25.0 ± 1.7 mmHg, p<0.001). This was associated with an increase of αSMA positive vessels. In both groups, there was a significantly increased expression of proteins associated with the contractile apparatus (diphosphoHsp27 (p<0.001), Septin2 (p<0.001), F‐actin capping protein (p<0.01), and tropomyosin β (p<0.02)). In CH, proteins of the nitric oxide (Hsc70; p = 0.002), carbon monoxide (biliverdin reductase; p = 0.005), and vascular endothelial growth factor (VEGF) pathway (annexin 3; p<0.001) were significantly increased. In MCT, proteins involved in serotonin synthesis (14‐3‐3; p = 0.02), the enhanced unfolded protein response (ERp57; p = 0.02), and intracellular chloride channels (CLIC 1; p = 0.002) were significantly elevated. Therefore, MCT‐ and CH‐induced vasoconstriction and remodeling seemed to be mediated via different signaling pathways. These differences should be considered in future studies using either PAH model.
Purification of the Prep1 interactome identifies novel pathways regulated by Prep1
Authors: Díaz Víctor M. , Bachi Angela , Blasi Francesco 
Published: July 2007

AbstractPrep1 homeodomain transcription factor interacts with Pbx proteins to regulate oculogenesis, angiogenesis, and hematopoiesis in mice. To isolate new Prep1 interactors competing or copurifying with Pbx, we identified proteins copurified with Prep1‐TAP by tandem affinity purification (TAP). Prep1–TAP was fully functional and allowed the isolation of a Prep1 proteome from cytoplasm and nucleus, but most interactors were nuclear. The Prep1–TAP complex included Pbx1b, Pbx2, and other nonhomeodomain proteins: p160 Myb‐binding protein (p160), β‐actin, NMMHCIIA.
Isolation of signal transduction complexes using biotin and crosslinking methodologies
Authors: Freed Julie K. , Smith Julia R. , Li Peigang , Greene Andrew S. 
Published: July 2007

AbstractWe have developed a strategy to preferentially label the N‐terminal α‐amino groups of intact proteins allowing the internal ϵ‐amino groups to remain free to react with chemical crosslinking reagents. The convergence of these methodologies allows biotinylated ligands to bind to their receptors within the cell membrane followed by removal of the crosslinked complex from cell lysate. This technique allows for the isolation of protein complexes in an MS‐compatible system, thus providing a tool for furthering our understanding of signal transduction.
A prospective study on educational level and adaptation to cancer, within one year after the diagnosis, in an older population
Authors: Barbareschi Giorgio , Sanderman Robbert , Tuinstra Jolanda , van Sonderen Eric , Ranchor Adelita V. 
Published: July 2007

AbstractSocio‐economic status (SES) has often been associated with health disparities and mortality in cancer patients, yet systematic research into the role of SES in the course of the disease is lacking. This prospective study intends to examine the role of SES (i.e. educational level in this study) in psychological and physical adaptation to cancer. Ninety‐nine cancer patients were followed from a community‐based survey. Pre‐ and post‐morbid data on patients' quality of life (QoL) were available. Adaptation was defined by looking at the level and pattern of scores on QoL scales from pre‐ to post‐disease assessments. Results show some non‐significant trends that more high‐educated patients managed to adapt completely to cancer in relation to role and physical functioning when compared with low‐educated participants. Furthermore, the greater part of high‐educated patients who completely adapted in physical functioning achieved this result more rapidly without an initial deterioration. Unexpectedly, these differences were not significant when tested in a regression model. Hence, although there are some indications for differences in adaptation to role and physical functioning between educational groups, we did not find any evidence that proved such a relation. For the group as a whole, it is very interesting to see that based on our operationalization of adaptation, only a small percentage of patients deteriorated from pre‐ to post‐disease assessments. Copyright © 2007 John Wiley & Sons, Ltd.
A novel approach to local similarity of protein binding sites substantially improves computational drug design results
Authors: Ramensky Vasily , Sobol Alexandr , Zaitseva Natalia , Rubinov Anatoly , Zosimov Victor 
Published: July 2007

AbstractWe present a novel notion of binding site local similarity based on the analysis of complete protein environments of ligand fragments. Comparison of a query protein binding site (target) against the 3D structure of another protein (analog) in complex with a ligand enables ligand fragments from the analog complex to be transferred to positions in the target site, so that the complete protein environments of the fragment and its image are similar. The revealed environments are similarity regions and the fragments transferred to the target site are considered as binding patterns. The set of such binding patterns derived from a database of analog complexes forms a cloud‐like structure (fragment cloud), which is a powerful tool for computational drug design. It has been shown on independent test sets that the combined use of a traditional energy‐based score together with the cloud‐based score responsible for the quality of embedding of a ligand into the fragment cloud improves the self‐docking and screening results dramatically. The usage of a fragment cloud as a source of positioned molecular fragments fitting the binding protein environment has been validated by reproduction of experimental ligand optimization results. Proteins 2007. © 2007 Wiley‐Liss, Inc.
Diffuse Reflectance Spectrum of Cuprous Oxide
Authors: Tandon S. P. , Gupta J. P. 
Published: July 2007

AbstractThe diffuse reflectance spectrum of cuprous oxide (Cu2O) for both pure and diluted samples has been studied in the region 200 to 1000 nm. Four bands having energies 2.67, 3.85, 4.64, and 5.00 eV have been observed. The results are discussed in the light of the band structure of Cu2O. The forbidden energy gap has been estimated to be 2.02 eV.
Isomeric Shifts in Some Tellurium (IV) Isoelectronic Complexes
Authors: Gukasyan S. E. , Iofa B. Z. , Karasev A. N. , Semenov S. I. , Shpinel V. S. 
Published: July 2007

AbstractThe Mössbauer effect of the 35.5 keV transition in Te125 has been studied in Me[TeIVHal6] type compounds. The dependence of the isomeric shift on ligand electronegativity has been found to disagree with the behaviour expected from the positive sign of ΔR/R established for Te125. Such disagreement can be explained by the presence of an unshared pair of electrons on the valence shell of the four‐valent tellurium in the compounds studied.
Mössbauer Effect in the FeS1+x System
Authors: Goncharov G. N. , Ostanevich Yu. M. , Tomilov S. B. , Cser L. 
Published: July 2007

AbstractA study was made of the composition dependence of the Mössbauer effect in the FeS1+x system in the range 0 ≪ x ≪ 0.135 at room temperature. The observed changes of the Mössbauer parameters are attributed to phase transitions and related to the variation of the concentration of iron vacancies with composition. The measured value of the quadrupole splitting is in good agreement with the prediction from the point charge model. The presence of Fe3+ could not be inferred from any observation in the studied range of concentration. The observed influence of iron vacancies indicates a strong superexchange which can be held responsible for the ferromagnetic bond of iron spins in the C‐plane. A short range order of vacancies is suggested for the explanation of the observed composition dependence of the phase transitions.
On the Mechanism of the Reduction of the Specular Boundary Scattering of Phonons
Authors: Bausch W. , Waidelich W. 
Published: July 2007

AbstractThe Boltzmann equation is solved for the case of the thin film and the cylindrical rod with a surface layer of different relaxation time. It can be shown that the reduction of specular boundary scattering observed after sandblasting is mainly due to the numerous dislocations introduced by this procedure.
ESR Spectra of Se− in Silver Chloride Crystals Doped with Selenium and Cadmium
Authors: Schwarz D. 
Published: July 2007

AbstractAn impurity ion centre identified as Se− has been produced by irradiation with blue light at − 100°C in AgCl:Se, Cd. The p‐function containing the unpaired electron points along [100] crystal direction and the centre has orthorhombic symmetry (point group C2v). A hyperfine interaction of the unpaired electron with one 77Se nucleus is observed. Apart from this an additional splitting of the lines indicates a strong superhyperfine interaction with two silver ions. A qualitative understanding of this structure can be obtained as follows: The ground state pz (z parallel [100]) forms σ‐bonds with two Ag+ ions on the z‐axis of the centre.
EPR Investigations on CaWO4:Pb Single Crystals
Authors: Born G. , Hofstaetter A. , Scharmann A. 
Published: July 2007

AbstractElectron paramagnetic resonance has been observed at single crystals of calcium tungstate doped with lead. After exposure to X‐ray irradiation at the temperature of liquid air paramagnetic centres appear. One group of lines originates from the Vk‐centre in the tungstates. The resonance of Pb3+ ions at Ca2+ sites is reported. This spectrum is characterized by a pronounced hyperfine interaction of the unpaired 6s electron of the Pb3+ ion with the nuclear magnetic moment of the Pb207 isotope. Superhyperfine interaction with four surrounding tungsten nuclei is observed indicating covalent bonding effects with the tungstate groups as ligands and a treatment of the complex in terms of molecular orbitals is proposed. The thermal annealing of the centres detected by EPR is correlated with the thermoluminescence glow curve.
On the Schrödinger Equation in the Extended Crystal Momentum Representation
Authors: Iadonisi G. , Preziosi B. 
Published: July 2007

AbstractAn extended crystal momentum representation is proposed and an alternative form of the Schrödinger equation in the crystal momentum representation (CMR) is given, which can be useful for strong impurity potentials. Moreover, properties of the operators and wave functions, which characterize such a representation, are discussed.
F19 Spin‐Lattice Relaxation in Solid K3ZrF7
Authors: Sharp A. R. , Lahajnar G. , Pintar M. M. 
Published: July 2007

AbstractThe model of Hampson and Pauling for the structure of the [ZrF7]3− ion is considered in the light of a transient nuclear magnetic resonance study of K3ZrF7.
The Elastic Anisotropy of CuZn as Determined by an Electron Microscope Study of Unstable Dislocations
Authors: Morton A. J. , Head A. K. 
Published: July 2007

AbstractThe elastic anisotropy of equiatomic β′‐CuZn has been determined by an electron microscope study of regions of directional instability of glide dislocations. Contrary to the previous measurements of McManus, it is concluded that the elastic anisotropy of β′‐CuZn is not significantly different from that of β′‐Cu‐48 at% Zn.
Electrical Resistivity of Dilute Chromium‐Rich Chromium‐Iron Alloys below 30 °K
Authors: Arajs S. 
Published: July 2007

AbstractElectrical resistivity ϱ of chromium‐iron alloys containing 0.04, 0.08, 0.9, 1.1, 1.3, 1.6, 1.8, and 3.3 at% iron has been measured as a function of temperature T below 30 °K. There are no anomalies in the ϱ vs. T curves for pure chromium and the alloys with 0.04 and 0.08 at% iron. The sample of 0.9 at% iron exhibits a small resistivity minimum at 10 °K. Higher iron contents cause a disappearance of this minimum. The temperature dependence of the electrical resistivity for 1.3, 1.8, and 3.3 at% iron solid solutions is anomalous. The transverse electrical magnetoresistivity of alloys containing 0.9, 2.3, and 3.3 at% iron has been studied at 4.2 °K in magnetic fields up to 12 kOe. The change in the magnetic component of the total magnetoresistivity has been found to be negative for all these samples. The above results have been interpreted as resulting from the localized magnetic moments on the iron atoms which couple weakly with the antiferromagnetic lattice of chromium.
Distribution of M‐Centres after Annealing in Plastically Deformed LiF Crystals
Authors: Serughetti J. , Saucier H. 
Published: July 2007

AbstractThe persistence of M‐centres in glide bands after annealing is explained with the aid of edge dislocations dipoles. On one hand these would cause the segregation of M‐centres, and on the other hand the segregation of the complementary interstitials, migrating in the opposite direction under the action of residual stresses. This slows down the recombination of these defects and consequently the thermal bleaching.
Thermally Stimulated Conductivity of Irradiated KBr
Authors: Taylor A. 
Published: July 2007

AbstractThe thermally stimulated conductivity of KBr crystals irradiated at 10 °K with monoenergetic neutrons and γ‐rays was studied over the temperature range 10 to 300 °K. The peak spectrum below 70 °K was associated with the annihilation of lattice defects created by the irradiation, while the higher temperature peaks were interpreted as due to the depopulation of impurity traps. The annealing kinetics of the low‐temperature peak were consistent with defect annihilation processes controlled by the migration of the Br− interstitials. Neutron bombardment enhanced significantly the low‐temperature peaks above the level established by background γ‐rays.
Calculation of the Magnetoconductivity in n‐Si in High Electric Fields
Authors: Asche M. , Sarbei O. G. 
Published: July 2007

AbstractThe magnetoconductivity of hot carriers in n‐Si for 77 °K is examined theoretically. Ellipsoidal constant energy surfaces and redistribution of electrons between the valleys are taken into account. The calculations are performed for the case of weak magnetic fields in the <110> direction, when the electric field is applied along <001>. The numerical results exhibit the characteristic features observed experimentally, i.e. a region of negative magnetoresistivity for intermediate electric field strengths.
Preparation and Optical Properties of Evaporated β‐HgS Films
Authors: Siemsen K. J. , Riccius H. D. 
Published: July 2007

AbstractA modified vacuum deposition technique has been developed for producing thin films of HgS with cubic structure. Transmission and reflection measurements near the fundamental absorption edge have been carried out at various temperatures. The room temperature energy gap is determined to be 0.54 eV. The temperature shift of the optical absorption edge in β‐HgS is +7.7 × 10−4 eV/°K. With increasing carrier concentration, the absorption edge exhibits a shift to higher energies. The electron effective mass has been determined from reflectivity measurements. Its dependence on carrier concentration indicates nonparabolic behaviour of the conduction band. The temperature dependence of the electrical resistivity, Hall coefficient, and mobility between 4.2 and 300 °K has been measured. These studies reveal semimetallic behaviour of β‐HgS.
Hole Conduction in Non‐Stoichiometric Silver Chloride
Authors: Müller P. , Spenke S. , Teltow J. 
Published: July 2007

AbstractTo remedy the lack of experimental data for holes in AgCl crystals, new measurements of the conductivity increase of zone‐refined AgCl crystals in Cl2 atmospheres were undertaken in the range 50 to 300 °C. The hole mobility was derived from a kinetic study of the conductivity change after admission/removal of the chlorine gas, taking into account the diffusion potential. Values for the enthalpy of hole formation in AgCl under different conditions of lattice disorder are given.
On the Quantum Theory of the Ferroelectric State in Electric Dipole Systems
Authors: Saburova R. V. 
Published: July 2007

AbstractA theoretical investigation of the possibility of the existence of “spin” waves in a system of OH− dipoles in the KCl lattice is presented. The system is shown to exist in the ferro‐electric state at very low temperatures. The expressions for the electric polarization and the heat capacity of the electric dipole system are obtained. A short theory of ferroelectric resonance is given.
On the Conductivity Mechanism of β‐Rhombohedral Boron
Authors: Werheit H. , Leis H. G. 
Published: July 2007

AbstractElectron and hole trapping levels of high density of states determine essentially the conductivity mechanism of β‐rhombohedral boron. The ionization energy of trapped electrons is much greater than that of trapped holes; so, up to high temperatures, the electrons do not appreciably contribute to the charge transport. From electrical conductivity and thermoelectric power at higher temperatures one obtains the activation energy of the hole mobility (0.19 eV). At low temperatures hopping within the hole trapping level seems to be the prevailing conductivity mechanism.
Low Temperature Specific Heat Measurements of Semi‐Borides of the First Series of Transition Elements
Authors: Kuentzler R. 
Published: July 2007

AbstractThe low temperature specific heat of nineteen borides T2B of transition elements was measured between 1.2 and 4.2 °K. The variation of the electronic specific heat coefficient γ as a function of the e/a ratio of the transition metal gives the shape of the 3d‐band of T2B. The band shape shows a minimum for the transition from weak to strong ferromagnetism. For the concentrations where the ferromagnetism appears and disappears, the γ values are strongly enhanced and do not express the real density of states at the Fermi level. The end of the T2B band compared with that of transition metals is shifted to lower e/a values as a result of a transfer of electrons to the 3d‐band due to the presence of boron atoms.
Resistivity Changes in Quenched Cd
Authors: Sprušil B. , Vostrý P. , Pamêtnická I. 
Published: July 2007

AbstractCd wires of purity 99.998 at% were quenched from TQ = 503 and 543 °K to 78 °K. Resistivity changes upon an isochronal and isothermal annealing were studied in the temperature range 78 to 430 °K. In the specimens investigated four recovery intervals were observed and in three of them recovery kinetics and activation energies were determined. The possible role of vacancies is discussed.
Exciton Absorption in Compensated Germanium
Authors: Safarov V. I. , Shlimak I. S. , Titkov A. N. 
Published: July 2007

AbstractThe fine structure of the indirect absorption edge in highly compensated germanium has been investigated by the wavelength derivative technique. This technique offers significant advantages, the exciton knees in the indirect absorption being transformed into sharp peaks. With increasing impurity concentration in compensated samples the excitonic structure disappears. This phenomenon has been shown to be due to ionization of excitons in electric fields of randomly distributed impurity ions. The critical concentration found experimentally is 2 × 1017 cm−3, which agrees well with theoretical estimates.
Ionic Charge and Lattice Dynamics of Cubic Zinc Sulphide
Authors: Kunc K. , Balkanski M. , Nusimovici M. 
Published: July 2007

AbstractThe lattice dynamics of cubic zinc sulphide is established with special attention paid to the value of static ionic charge. A simple ten parameters model of deformable ions is used which treats the short‐range interactions in terms of the valence force field and which considers the mechanical and electrical polarizabilities of the atoms in a simple manner. The recent inelastic neutron scattering measurements of the phonon dispersion curves being taken into account, the static ionic charge was found to be within the limits qZn ϵ (+0.25; +0.5) ∣e∣ and the value qZn = +0.335 ∣e∣ is considered as the most convenient one for the lattice dynamical calculations. Phonon dispersion curves and the density of states are calculated, the influence of various simplifications of the model is discussed.