bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fragment Docking to S100 Proteins Reveals a Wide Diversity of Weak Interaction Sites
Authors: Arendt Yvonne , Bhaumik Anusarka , Del Conte Rebecca , Luchinat Claudio , Mori Mattia , Porcu Marco 
Published: August 2007

AbstractThe S100 protein family is a highly conserved group of Ca2+‐binding proteins that belong to the EF‐hand type and are considered potential drug targets. In the present study we focused our attention on two members of the family: S100A13 and S100B; the former is involved in the nonclassical protein release of two proangiogenic polypeptides FGF‐1 and IL‐1α that are involved in inflammatory processes, whereas S100B is known to interact with the C‐terminal domain of the intracellular tumor suppressor p53 and promote cancer development. We screened, using waterLOGSY NMR experiments, 430 molecules of a generic fragment library and we identified different hits for each protein. The subset of fragments interacting with S100B has very few members in common with the subset interacting with S100A13. From the 15N‐HSQC NMR spectra of the proteins in the presence of those hits the chemical shift differences Δδ(HN) were calculated, and the main regions of surface interaction were identified. A relatively large variety of interaction regions for various ligands were identified for the two proteins, including known or suggested protein–protein interaction sites.
Application of Fourier differential quadrature for the analysis of photonic crystals
Authors: Mahzoon M. , Abiri H. , Ghayour R. 
Published: August 2007

AbstractA Fourier expansion‐based differential quadrature (FDQ) method is used for computing the spectrum and eigenmodes of 2‐D photonic crystals. The FDQ method is applied to the master equation of photonic crystals, which is in the form of an eigenvalue problem. It is shown that the complex periodic Bloch eigenfunction may be determined by this method. The region under consideration is a unit cell with periodic boundary conditions and consists of two different dielectric materials. Thus, there are discontinuities in the region. By adjusting the position of grid points properly, the accuracy of solution can be improved.Since proper analytical interpolation functions are used in the DQ method, its accuracy is high compared with the conventional low‐order finite difference and finite element methods, whereas the number of required grid points is quite smaller. In addition, the method is efficient as far as the CPU capacity and computational time
are concerned because of the low number of grid points used. Copyright © 2007 John Wiley & Sons, Ltd.
Variations in the colorimetric characteristics of verdigris pictorial films depending on the process used to produce the pigment and the type of binding agent used in applying it
Authors: De la Roja José Manuel , San Andrés Margarita , Cubino Natalia Sancho , Santos‐Gómez Sonia 
Published: August 2007

AbstractThe term verdigris embraces a wide range of synthetic pigments whose compositions can also vary. All are salts of copper, but their chemical composition will vary depending on the ingredients used to synthesize them and the conditions in which that synthesis is performed.This article presents the results of applying some of the recipes contained in treatises; the recipes used here, specifically, were taken from the Mappae Clavicula (12th century) and the Ms. of Pierre Lebrun (17th century). The ingredients mentioned present some variations, so that the pigments prepared in turn exhibit significant differences in terms of chemical composition and colorimetric characteristics. The recipes from the Mappae Clavicula, for example, produced monohydrated copper(II) acetate, which upon binding with gum arabic created bluish‐green pictorial films, whereas the colour was yellowish green when the binder was linseed oil. The pigment made from Pierre Lebrun's recipe was a copper(II) chloride mixed with an organo‐copper complex, which can be bound with gum arabic to produce a yellowish‐green colour, whereas mixing with linseed oil presented certain difficulties. These results are derived from colorimetric measurements, which were used to produce values of lightness (L), chroma (C) and hue (H), and also percent reflectance spectra. © 2007 Wiley Periodicals, Inc. Col Res Appl, 32, 414–423, 2007
Prediction of spectral reflectance factor distribution of color‐shift paint finishes
Authors: Takagi Atsushi , Sato Shinsuke , Baba Gorow 
Published: August 2007

AbstractAs the exterior paint colors of automobiles change the shade of color and brightness according to viewing angle, the appearance of a paint finish is expressed numerically by the reflection characteristic (i.e. reflectance) of paint surface. We figure out that the reflectance of most automotive paint finishes is best measured at the incident angle of 60° and the five aspecular angles of 10°, 18°, 28°, 40°, and 90° on the incident plane (Color Res Appl 2005;30:275–282). However, in the case of the so‐called color shift paint, which changes its paint finish appearance as a jewel beetle, depending on the light source location, the reflection characteristic can not be expressed accurately by conventional measuring methods. As the directions not included in the incident plane need to be taken into account, we have to measure at 48,139 points, changing all the incident angles and reflected angles. (It would take about 16 days.) We, therefore, tried to reduce the number of combinations of incident and reflected angles by analyzing the experimental data. Consequently, we reduced it to 1485 points (about 4 h). When we numerically compared our result to the result of all measuring points, we found that the color difference is 2.76 and therefore our method is practically usable. © 2007 Wiley Periodicals, Inc. Col Res Appl, 32, 378–387, 2007
Recovering spectral data from natural scenes with an RGB digital camera and colored filters
Authors: Valero Eva M. , Nieves Juan L. , Nascimento Sérgio M. C. , Amano Kinjiro , Foster David H. 
Published: August 2007

AbstractMany spectral‐recovery methods using RGB digital cameras assume the underlying smoothness of illuminant and reflectance spectra, and apply low‐dimensional linear models. The aim of the present work was to test whether a direct‐mapping method could be used instead of a linear‐models approach to recover spectral radiances and reflectances from natural scenes with an RGB digital camera and colored filters. In computer simulations, a conventional RGB digital camera with up to three colored filters was used to image scenes drawn from a hyperspectral image database. Three measures were used to evaluate recovery with the direct‐mapping method: goodness‐of‐fit, root‐mean‐square error, and a color‐difference metric. It was found that with two and three filters both spectral radiances and reflectances could be recovered sufficiently accurately for many practical applications. With little increase in computational complexity, an RGB camera and a few colored filters can provide significantly better recovery of natural scenes than an RGB camera alone. © 2007 Wiley Periodicals, Inc. Col Res Appl, 32, 352–360, 2007
Diffractive CIE 1931 chromaticity diagram
Authors: Orava Joni , Jääskeläinen Timo , Parkkinen Jussi , Leppanen Veli‐Pekka 
Published: August 2007

AbstractA novel diffractive CIE 1931 chromaticity diagram is generated by utilizing surface relief gratings on a plastic sample. A properly illuminated sample is shown to reflect the CIE chromaticity diagram with exact colors and large gamut. Additive color mixing is accomplished by utilizing the four main peaks of a 4000 K fluorescent lamp's spectrum as the primary colors. The primary grating units are reflecting the combination of the primary colors to the desired viewing angle and thereby forming the correct chromaticity (x, y) at each pixel of chromaticity diagram. Weights of primary colors at each pixel of the diagram are controlled by fixing the relative areas of the primary gratings. The master grating is fabricated with aid of electron beam lithography. The final grating is hot embossed on a polycarbonate sample using an electroplated nickel shim. Chromaticity values are measured from the plastic sample by a spectroradiometer. © 2007 Wiley Periodicals, Inc. Col Res Appl, 32, 409–413, 2007
Active target particle swarm optimization
Authors: Zhang Ying‐Nan , Hu Qing‐Ni , Teng Hong‐Fei 
Published: August 2007

AbstractWe propose an active target particle swarm optimization (APSO). APSO uses a new three‐target velocity updating formula, i.e. the best previous position, the global best position and a new target position (called active target). In this study, we distinguish APSO from EPSO (extended PSO)/PSOPC (PSO with passive congregation) by the different methods of getting the active target. Note that here EPSO and PSOPC are the two existing methods for using three‐target velocity updating formula, and getting the third (active) target from the obtained positions by the swarm. The proposed APSO gets the active (third) target using complex method, where the active target does not belong to the existing positions. We find that the APSO has the advantages of jumping out of the local optimum and keeping diversity; however, it also has the disadvantages of adding some extra computation expenses. The experimental results show the competitive performance of APSO when compared with PSO, EPSO, and PSOPC. Copyright © 2007 John Wiley & Sons, Ltd.
Automatic capture and reconstruction of computational provenance
Authors: Frew James , Metzger Dominic , Slaughter Peter 
Published: August 2007

AbstractThe Earth System Science Server (ES3) project is developing a local infrastructure for managing Earth science data products derived from satellite remote sensing. By ‘local,’ we mean the infrastructure that a scientist uses to manage the creation and dissemination of her own data products, particularly those that are constantly incorporating corrections or improvements based on the scientist's own research. Therefore, in addition to being robust and capacious enough to support public access, ES3 is intended to be flexible enough to manage the idiosyncratic computing ensembles that typify scientific research. Instead of specifying provenance explicitly with a workflow model, ES3 extracts provenance information automatically from arbitrary applications by monitoring their interactions with their execution environment. These interactions (arguments, file I/O, system calls, etc.) are logged to the ES3 database, which assembles them into provenance graphs. These graphs resemble workflow specifications, but are really reports—they describe what actually happened, as opposed to what was requested. The ES3 database supports forward and backward navigation through provenance graphs (i.e. ancestor/descendant queries), as well as graph retrieval. Copyright © 2007 John Wiley & Sons, Ltd.
Tetrahedral CoII Complexes with CoI2O2 and CoO2S2 Cores – Crystal Structures of [Co{HN(OPPh2)(SPPh2)‐O}2I2] and [Co{N(OPPh2)(SPPh2)‐O,S}2]
Authors: Aragoni M. Carla , Arca Massimiliano , Carrea M. Bonaria , Garau Alessandra , Devillanova Francesco A. , Isaia Francesco , Lippolis Vito , Abbati Gian Luca , Demartin Francesco , Silvestru Cristian , Demeshko Serhiy , Meyer Franc 
Published: August 2007

AbstractThe compound [CoII{HN(OPPh2)(SPPh2)‐O}2I2] (1) was synthesised by the reaction of cobalt in powder with the iodine adduct of tetraphenylthiooxoimidodiphosphinic acid, HN(OPPh2)(SPPh2), in Et2O; treatment of compound 1 with NaOH resulted in deprotonation of the ligands bound to the metal ion and a separation of [CoII{N(OPPh2)(SPPh2)‐O,S}2] (2). Molecular structures of complexes 1 and 2 were elucidated by X‐ray diffraction analysis, which revealed a CoI2O2 tetrahedral core for compound 1 in which two neutral ligands bind through the oxygen atoms the CoII ion, and a tetrahedral CoO2S2 core for compound 2 with the oxygen and sulfur atoms of each anionic ligand chelating a CoII centre. Variable‐temperature magnetic susceptibility measurements are consistent with tetrahedral high‐spin (S = 3/2) CoII that possesses a 4A2 ground state with best fit parameters g = 2.25, |D| = 12.0 cm–1 and g = 2.37, |D| = 11.9 cm–1 for complexes 1 and 2, respectively. The compounds were further characterised by UV/Vis and IR spectroscopy. DFT calculations were performed on model complexes [CoII{N(OPH2)(SPH2)‐O,S}2] (3) and [CoII{N(SPH2)2‐S,S′}2] (4) to compare the electronic properties of the CoO2S2 and CoS4 cores. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Structure of the Iron‐Binding Exopolysaccharide Produced Anaerobically by the Gram‐Negative Bacterium Klebsiella oxytoca BAS‐10
Authors: Leone Serena , De Castro Cristina , Parrilli Michelangelo , Baldi Franco , Lanzetta Rosa 
Published: August 2007

AbstractKlebsiella oxytoca BAS‐10 is a Gram‐negative micro‐organism capable of growing on high concentrations of heavy metals. This bacterium produces large amounts of an iron‐binding exopolysaccharide that, in the presence of metallic cations, precipitates as a dense gel. The primary and secondary structure of the repeating unit of such polysaccharide has been characterised by chemical and spectroscopic methods, resulting in the following heptasaccharide: 2)‐α‐Rha‐(1→3)‐β‐Gal‐(1→2)‐α‐Rha‐(1→4)‐β‐GlcA‐[β‐GlcA‐(1→4)]‐(1→3)‐α‐Rha‐(1→3)‐α‐Rha‐(1→. The absolute configurations for the Rha units are L, while those for the GlcA and Gal residues are D. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Cyclic behavior of laterally loaded concrete piles embedded into cohesive soil
Authors: Tuladhar Rabin , Maki Takeshi , Mutsuyoshi Hiroshi 
Published: August 2007

AbstractModern seismic design codes stipulate that the response analysis should be conducted by considering the complete structural system including superstructure, foundation, and ground. However, for the development of seismic response analysis method for a complete structural system, it is first imperative to clarify the behavior of the soil and piles during earthquakes. In this study, full‐scale monotonic and reversed cyclic lateral loading tests were carried out on concrete piles embedded into the ground. The test piles were hollow, precast, prestressed concrete piles with an outer diameter of 300 mm and a thickness of 60 mm. The test piles were 26 m long. Three‐dimensional (3D) finite element analysis was then performed to study the behavior of the experimental specimens analytically. The study revealed that the lateral load‐carrying capacity of the piles degrades when subjected to cyclic loading compared with monotonic loading. The effect of the use of an interface element between the soil and pile surface in the analysis was also investigated. With proper consideration of the constitutive models of soil and pile, an interface element between the pile surface and the soil, and the degradation of soil stiffness under cyclic loading, a 3D analysis was found to simulate well the actual behavior of pile and soil. Copyright © 2007 John Wiley & Sons, Ltd.
Decentralized robust control of building structures under seismic excitations
Authors: Ma Tian‐Wei , Xu Ning‐Shou , Tang Yu 
Published: August 2007

AbstractMany of the control algorithms proposed for structures subjected to seismic excitations are based on a centralized design philosophy, such as the linear quadratic regulator (LQR) design. The information of all the states of the system is usually required in these methods to determine the control command. For applications involving large‐scale systems, it may be more convenient to design decentralized controllers that depend only on the information of the local states for control command calculation. In this study, a nonlinear decentralized robust control algorithm is proposed. The structural system is decomposed into several artificially uncoupled subsystems. The interconnections between adjacent subsystems are treated as uncertain but bounded disturbances to the subsystems. The controller associated with one subsystem determines the control
command based only on the states of the local subsystem. Numerical examples of linear and nonlinear structural models are presented to demonstrate the effectiveness and robustness of the proposed controller. The traditional LQR design is used as a baseline for comparison. Copyright © 2007 John Wiley & Sons, Ltd.
Spherical sliding isolation bearings with adaptive behavior: Experimental verification
Authors: Fenz Daniel M. , Constantinou Michael C. 
Published: August 2007

AbstractThis paper describes an experimental program to examine the force–displacement behavior of a class of multi‐spherical sliding bearings. The primary goal of the experiments is to test the validity of the theory developed in a companion paper that describes the behavior of these devices. Experimental work consisted of testing the three primary variations of these bearings in several configurations of different friction and displacement capacities. Most tests were carried out at slow speeds; however, some testing was also conducted at high speed (up to approximately 400 mm/s) to examine the behavior under dynamic conditions. The results of experimental testing were generally found to be in very good agreement with the analytical results. It is shown that the forces and displacements at which transitions in stiffness occur are predictable and therefore controllable in design. Furthermore, the underlying principles of operation were confirmed by the fact that starting and stopping of sliding on the different surfaces occurred as expected from theory. Copyright © 2007 John Wiley & Sons, Ltd.
It would not have happened to me at home: qualitative exploration of sojourns abroad and eating disorders in young Czech women
Authors: Pavlova Barbara , Uher Rudolf , Papezova Hana 
Published: August 2007

AbstractBackgroundEating disorders can be triggered by life events involving migration and acculturation.AimTo explore associations between sojourns abroad and the onset and course of eating disorders.MethodSix semi‐structured interviews with women with an eating disorder and history of sojourn abroad and seven first‐person Internet testimonies were analysed using interpretative phenomenological analysis (IPA).ResultsWe identified three trajectories relating eating disorders to sojourns abroad: (I) weight‐gain when abroad associated with later development of an eating disorder; (II) development or worsening of an eating disorder when abroad; (III) stay abroad as an attempt to escape the illness. Three topics informed on the impact of sojourns abroad on mental health: (A) different food and eating habits; (B) negative emotions; (C) illness as attempt to achieve something valuable.ConclusionThe importance of the identified trajectories and topics relating eating disorders to sojourns abroad needs to be estimated in an epidemiological study. Copyright © 2007 John Wiley & Sons, Ltd and Eating Disorders Association.
Effects of youth, price, and audience size on alcohol advertising in magazines
Authors: Nelson Jon P. , Young Douglas J. 
Published: August 2007

AbstractIn this paper, we study the effects of youth readership, price of advertisements, and audience size on alcohol advertising in 35 major magazines. The regressions also account for readership demographics (adult reader age, income, gender, race), magazine characteristics (newsstand sales, number of annual issues), and type of beverage (beer, wine, spirits). Using count data models, the results indicate significant effects for price, audience size, and adult demographics, but fail to support claims that alcohol advertisers target adolescent readers. Copyright © 2007 John Wiley & Sons, Ltd.
Measuring health polarization with self‐assessed health data
Authors: Apouey Benedicte 
Published: August 2007

AbstractThis paper proposes an axiomatic foundation for new measures of polarization that can be applied to ordinal distributions such as self‐assessed health (SAH) data. This is an improvement over the existing measures of polarization that can be used only for cardinal variables. The new measures of polarization avoid one difficulty that the related measures for evaluating health inequalities face. Indeed, inequality measures are mean based, and since only cardinal variables have a mean, SAH has to be cardinalized to compute a mean, which can then be used to calculate an inequality measure. In contrast, the new polarization measures are median based and hence do not require to impose cardinal scaling on the categories. After deriving the properties of these new polarization measures, we provide an empirical illustration using data from the British Household Panel Survey that demonstrates that SAH polarization is also a relevant question on empirical grounds, and that the polarization measures are adequate to evaluate polarization phenomena whereas inequality measures are not adequate in these cases. Copyright © 2007 John Wiley & Sons, Ltd.
Opposite effects of glucocorticoid receptor activation on hippocampal CA1 dendritic complexity in chronically stressed and handled animals
Authors: Alfarez D.N. , Karst H. , Velzing E.H. , Joëls M. , Krugers H.J. 
Published: August 2007

AbstractRemodeling of synaptic networks is believed to contribute to synaptic plasticity and long‐term memory performance, both of which are modulated by chronic stress. We here examined whether chronic stress modulates dendritic complexity of hippocampal CA1 pyramidal cells, under conditions of basal as well as elevated corticosteroid hormone levels. Slices were prepared from naïve, handled or chronically stressed animals and briefly treated with vehicle or corticosterone (100 nM); neurons were visualized with a fluorescent dye injected into individual CA1 pyramidal cells. We observed that 21 days of unpredictable stress did not affect hippocampal CA1 apical or basal dendritic morphology compared with naïve animals when corticosteroid levels were low. Only when slices from stressed animals were also exposed to elevated corticosteroid levels, a significant reduction in apical (but not basal) dendritic length became apparent. Unexpectedly, animals that were handled or 3 weeks showed a reduction in both apical dendritic length and number of apical branch points when compared with naïve animals. Apical dendritic length and number of branch points were restored to levels found in naïve animals several hours after in vitro treatment with 100 nM corticosterone. All effects of acute corticosterone administration could be prevented by the glucocorticoid receptor antagonist RU38486 given during the last 4 days of the stress or handling protocol. We conclude that brief exposure to high concentrations of corticosterone can differently affect apical dendritic structure, depending on the earlier history of the animal, a process that critically depends on involvement of the glucocorticoid receptor. © 2007 Wiley‐Liss, Inc.
Testing and extending the unfolding model of voluntary turnover to it professionals
Authors: Niederman Fred , Sumner Mary , Maertz JR. Carl P. 
Published: August 2007

AbstractThis study examines the turnover decision processes of information technology (IT) personnel for the first time. Our theoretical guide for this investigation was the unfolding model of voluntary turnover (Lee & Mitchell, 1994), the preeminent turnover process model. Most of the 124 leavers used three new decision paths that shared the characteristic of including an alternative job search and evaluation; another significant number used the original five theorized paths. In sharp contrast to earlier findings on the unfolding model, the majority of respondents (88%) reported following paths not among the original five theorized paths.This result strongly suggests that IT professionals likely take numerous routes in deciding to leave current employment, most of which involve some search for and consideration of alternative jobs. A general conclusion for human resource managers is to assume that IT professionals are aware of alternative opportunities and to consider early interventions emphasizing the relative benefits of the current job over labor market competitors. © 2007 Wiley Periodicals, Inc.