bluuebunny/crossref_metadata_2025_split huggingface dataset:
Robust full‐motion recovery of head by dynamic templates and re‐registration techniques
Authors: Xiao Jing , Moriyama Tsuyoshi , Kanade Takeo , Cohn Jeffrey F. 
Published: June 2003

AbstractThis article presents a method to recover the full‐motion (3 rotations and 3 translations) of the head from an input video using a cylindrical head model. Given an initial reference template of the head image and the corresponding head pose, the head model is created and full head motion is recovered automatically. The robustness of the approach is achieved by a combination of three techniques. First, we use the iteratively reweighted least squares (IRLS) technique in conjunction with the image gradient to accommodate nonrigid motion and occlusion. Second, while tracking, the templates are dynamically updated to diminish the effects of self‐occlusion and gradual lighting changes and to maintain accurate tracking even when the face moves out of view of the camera. Third, to minimize error accumulation inherent in the use of dynamic templates, we re‐register images to a reference template whenever head pose is close to that in the template. The performance of the method, which runs in real time, was evaluated in three separate experiments using image sequences (both synthetic and real) for which ground truth head motion was known. The real sequences included pitch and yaw as large as 40° and 75°, respectively. The average recovery accuracy of the 3D rotations was about 3°. In a further test, the method was used as part of a facial expression analysis system intended for use with spontaneous facial behavior in which moderate head motion is common. Image data consisted of 1‐min of video from each of 10 subjects while engaged in a two‐person interview. The method successfully stabilized face and eye images allowing for 98% accuracy in automatic blink recognition. © 2003 Wiley Periodicals, Inc. Int J Imaging Syst Technol 13: 85–94, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ima.10048
Effect of textile waste water on the spermatogenesis of male albino rats
Authors: Gupta R. S. , Sharma Rakhi , Chaudhary Rakesh , Yadav Rajesh Kumar , Khan T. I. 
Published: June 2003

AbstractTextile waste water released from dyeing and printing industries situated in Sanganer, Jaipur (India), brought about inhibition of spermatogenesis in male rats. Water analysis showed the presence of heavy metals at more than permissible limits. Oral administration of waste water to the rats at the dose level of 26.6 ml kg−1 body wt. significantly reduced the weights of testes, epididymides and seminal vesicle. Treated animals showed a notable depression of various stages of spermatogenesis. The production of spermatids was inhibited by 70.8% in waste‐water‐treated rats. The populations of spermatogonia, preleptotene spermatocytes and secondary spermatocytes were decreased by 67.2, 71.1 and 73.2%, respectively. The total number of Sertoli cells was affected after waste water treatment. Reduced sperm count and motility resulted in treated groups.A significant fall in the content of various biochemical parameters of reproductive tissues was observed after water treatment. Copyright © 2003 John Wiley & Sons, Ltd.
Life history parameters of the Two‐spotted Spider Mite (Tetranychus urticae Koch) feeding on bean leaves treated with pyrrolizidine alkaloids
Authors: Pietrosiuk Agnieszka , Furmanowa Mirosława , Kropczyńska Danuta , Kawka Beata , Wiedenfeld Helmut 
Published: June 2003

AbstractIn this study we assess the effect of pyrrolizidine alkaloids (PAs) extracted from Lithospermum canescens on the biology of the two‐spotted spider mite (Tetranychus urticae Koch). Lithospermum canenscens (Michaux) Lehm. (Boraginaceae) is a common prairie plant also known as Indian paint or hoary puccoon. A mixture of seven PAs with known chemical structures was used in this investigation. Mites treated with PAs showed a high mortality of juveniles, a decrease in female fecundity and a shortened longevity. The intrinsic rate of population increase (rm) was used as an indicator of T. urticae population performance after treatment with PAs. The rm value obtained with alkaloid‐treated leaves was lower than that for mites developing on untreated leaves, which indicates that the mite population would develop much slower on treated plants. The results suggest that further studies should be performed to assess the possible use of PA extracts for spider mite control. Copyright © 2003 John Wiley & Sons, Ltd.
Leadership competence and political control: The influential factors
Authors: Itzhaky Haya , York Alan S. 
Published: June 2003

AbstractThis study considers the impact of social support upon the psychological empowerment of community activists. Although it has been clearly shown that the human and personal resources that individual activists bring to their voluntary activity and the inputs of the agencies and associations in which they are active both contribute to the activists' empowerment, little research has considered the effect of the support given by family, friends, and significant others. One hundred twenty‐two community activists in the lower socioeconomic neighborhoods of a city in the center of Israel filled in questionnaires at the conclusion of a year's training program. The questionnaires included scales of social support (family and friends), satisfaction with the course (practical and learning), leadership competence, policy control, self‐esteem, and mastery. The variables were of importance in their contribution to leadership competence and policy control, but in different ways. Both forms of satisfaction from the course, self‐esteem, and family support, contributed to leadership competence, while both mastery and self‐esteem, and the support of friends contributed to policy control. The differences between leadership competence and policy control are discussed in the light of these findings. © 2003 Wiley Periodicals, Inc. J Comm Psychol 31: 371–381, 2003.
Stigmatizing attitudes towards individuals with mental illness in Hong Kong: Implications for their recovery
Authors: Tsang Hector W.H. , Tam Phidias K.C. , Chan Fong , Cheung W.M. 
Published: June 2003

AbstractThe literature suggests that stigmatizing attitudes in the community will affect lives and recovery of people with mental illness. This is particularly serious and obvious in Chinese societies where mental illness is often associated with shame and stigma. As Hong Kong and China have undergone rapid changes in terms of social and economic development, this study aimed at providing the most up‐to‐date empirical information regarding mental illness stigma and its impact on individuals with mental illness. A 31‐item Questionnaire on Mental Illness was developed to measure public attitudes towards mental illness, with special reference to issues that affected the burden on family members of mental health consumers. The questionnaire together with the Level of Contact Sub‐scale (Holmes et al., 1999) was distributed to primary and secondary students for their friends and relatives aged 16 or above to complete. A total of 1,007 validly completed questionnaires were returned constituting a response rate of 74%. An exploratory factor analysis identified eight factors which accounted for 50.6% of the total variance: hostility, aberrant, openness, resources, acceptance, rights, misgivings, and accommodation. The data showed that there were rather severe stigmatizing attitudes in the community, such as beliefs about parents causing the illness, strong opposition to setting up psychiatric community facilities near their residence, and limited employment opportunities for people with mental illness, which also increased both the subjective and objective burdens on clients' relatives by denying them social and practical support. Correlations between previous contacts and attitudes are significant. Implications to further research and social policy are discussed. © 2003 Wiley Periodicals, Inc. J Comm Psychol 31: 383–396, 2003.
Victim‐reported risk factors for continued abusive behavior: Assessing the dangerousness of arrested batterers
Authors: Cattaneo Lauren Bennett , Goodman Lisa A. 
Published: June 2003

AbstractPolicy changes have dramatically increased the number of domestic violence cases entering criminal courts, creating a critical need for competent risk assessment. This study adds to the knowledge base about risk factors important to consider in such assessments, using a prospective design and follow‐up through victim interview. Participants were 169 primarily African American women who appeared at a court intake center following the arrest of an abusive partner. We reached over half of these participants for follow‐up 3 months later. Questionnaires administered at intake elicited information about demographics, substance abuse, the history of physical and psychological abuse in the relationship, the batterer's general violence, and the victim's own assessment of her level of endangerment. All variables were measured through victim report, combined with official records when relevant. Significant predictors of continued abusive behavior were the batterer's history of alcohol abuse, the severity of abuse in the relationship, the batterer's general violence, the level of psychological abuse in the relationship, and, notably, the victim's own assessment of the dangerousness of her case. Most variables were stronger in their sensitivity, or ability to correctly identify reabusers, than their specificity, or ability to correctly identify nonreabusers. Implications for practice and research are discussed. © 2003 Wiley Periodicals, Inc. J Comm Psychol 31: 349–369, 2003.
Community violence exposure in a young adult sample: III. Psychophysiology and victimization interact to affect risk for aggression
Authors: Scarpa Angela , Ollendick Thomas H. 
Published: June 2003

AbstractAn initial study of young adults with high and low exposure to community violence found that aggression was related to increased baseline heart rate variability (HRV), reduced baseline heart rate (HR), and increased poststressor cortisol level. Based upon previous research on biosocial interactions, this study tested specific predictions that the cardiovascular–aggression link would be found only in nonvictims and the cortisol–aggression link only in victims. Forty‐seven victims and nonvictims completed self‐reports of aggression and two stressor tasks. Results supported the hypotheses for HRV and cortisol. However, reduced HR was associated with aggression in both victims and nonvictims, and its variance was explained by increased HRV. Findings support biosocial theories of violence and are discussed in terms of vagally mediated HR underarousal and emotion dysregulation in antisocial populations. © 2003 Wiley Periodicals, Inc. J Comm Psychol 31: 321–338, 2003.
Perceived susceptibility to pregnancy and sexually transmitted disease among pregnant and nonpregnant adolescents
Authors: Kershaw Trace S. , Niccolai Linda M. , Ethier Kathleen A. , Lewis Jessica B. , Ickovics Jeannette R. 
Published: June 2003

AbstractThis study of urban adolescent females investigated predictors of perceived susceptibility to single and dual sexual outcomes (pregnancy only, sexually transmitted disease [STD] only, pregnancy and STDs). Thirty percent of participants felt susceptible to dual sexual outcomes. We developed a predictive model of perceived susceptibility to pregnancy/STDs from sexual risk‐behavior, sexual consequences (e.g., recent pregnancy and STD), relationship, cognitive, psychological, and personal factors. Dual pregnancy and STD susceptibility was associated with more than one sexual partner in the past year, no hormonal contraception use, inconsistent condom use, not being pregnant, and White race. In contrast, pregnancy‐only susceptibility was associated with only hormonal contraceptive use and not being pregnant. Finally, STD susceptibility was associated with more than one sexual partner in the past year, no hormonal contraceptive use, and low self‐esteem. We must understand how individuals perceive their susceptibility to complex combinations of reproductive health outcomes (e.g., pregnancy and STDs) to design interventions to increase condom and contraceptive use among adolescent females. © 2003 Wiley Periodicals, Inc. J Comm Psychol 31: 419–434, 2003.
Erratum
Authors: Long D. Adam , Perkins Douglas D. 
Published: June 2003

AbstractThe Note to Table 9 of “Confirmatory Factor Analysis of the Sense of Community Index and Development of a Brief SCI,” by D. Adam Long and Douglas D. Perkins (Journal of Community Psychology, Vol. 31, No. 3, p. 279) contained some incorrect text. Most importantly, the Note should read, “ … 7% of the variance,” rather than “ … 30% of the variance.”Also, six of the references appearing the the References section were missing B.J. Bishop as a coeditor. The corrected references are as follows.
Relative binding strength of terpyridine model complexes under matrix‐assisted laser desorption/ionization mass spectrometry conditions
Authors: Meier Michael A. R. , Lohmeijer Bas G. G. , Schubert Ulrich S. 
Published: June 2003

AbstractThe relative binding strength of a series of terpyridine metal complexes of the type [MIIL2]+ was investigated by using variable laser intensities in matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOFMS). A model terpyridine ligand, 4′‐(1,4,7‐trioxa‐octyl)‐2,2′:6′,2″‐terpyridine, was prepared and complexed with a series of transition metal ions including cadmium, cobalt, copper, iron, manganese, nickel and ruthenium. The relative binding strength of these complexes can be obtained by measuring MALDI mass spectra of the prepared compounds at different laser intensities. The ratio of the signal intensities belonging to the ligand [LH]+ and the complex [ML2]+ ([LH]+ /[ML2]+) depends on the laser intensity utilized for the spectrum acquisition. By considering an [LH]+/[ML2]+ ratio > 10 as the point of complete complex dissociation, it is possible to establish a row of complex stabilities depending on the kind of metal ion. Copyright © 2003 John Wiley & Sons, Ltd.
COMPLX: a computer algorithm for the detection of protein–ligand and other macromolecular complexes in mass spectra
Authors: Wong Jason W. H. , Downard Kevin M. 
Published: June 2003

AbstractA new algorithm has been designed and tested to identify protein, or any other macromolecular, complexes that have been widely reported in mass spectral data. The program takes advantage of the appearance of multiply charged ions that are common to both electrospray ionization and, to a lesser extent, matrix‐assisted laser desorption/ionization (MALDI) mass spectra. The algorithm, known as COMPLX for the COMposition of Protein–Ligand compleXes, is capable of identifying complexes for any protein or macromolecule with a binding partner of molecular mass up to 100 000 Da. It does so by identifying ion pairs present in a mass spectrum that, when they share a common charge, have an m/z value difference that is an integer fraction of a ligand or binding partner molecular mass. Several additional criteria must be met in order for the result to be ranked in the output file including that all m/z values for ions of the protein or complex have progressively lower values as their assigned charge increases, the difference between the m/z values for adjacent charge states (z, z + 1) decrease as the assigned charge state increases, and the ratio of any two m/z values assigned to a protein or complex is equal to the inverse ratio of their charge. The entries that satisfy these criteria are then ranked according to the appearance of ions in the mass spectrum associated with the binding partner, the length of a continuous series of charges across any set of ions for a protein and complex and the lowest error recorded for the molecular mass of the ligand or binding partner. A diverse range of hypothetical and experimental mass spectral data were used to implement and test the program, including those recorded for antibody–peptide, protein–peptide and protein–heme complexes. Spectra of increasing complexity, in terms of the number of ions input, were also successfully analysed in which the number of input m/z values far exceeds the few associated with a macromolecular complex. Thus the program will be of value in a future goal of proteomics, where mass spectrometry already plays a central role, for the direct analysis of protein and other associations within biological extracts. Copyright © 2003 John Wiley & Sons, Ltd.
Decomposition of Ḃ0,11 (ℤ) into special atoms
Authors: Boza Santiago , Torres Rodolfo H. 
Published: June 2003

AbstractThe so–called special atom space Ḃ0,11 (ℝ) plays an important role as a substitute in many problems in analysis for the larger Hardy space H1(ℝ). In this article the analogous space Ḃ0,11 (ℤ) in the discrete setting is investigated. In particular, appropriate special atom decompositions of the elements in the space are obtained. The work is motivated by previous work in the subject in the characterization of spaces of sequences.
Moduli of vector bundles in characteristic 2
Authors: Bhosle Usha N. 
Published: June 2003

AbstractLet X be a nonsingular curve of genus 2 over an algebraically closed field of characteristic 2. We show that the moduli space of semistable rank two vector bundles with a fixed determinant of even degree on X is isomorphic to the three dimensional projective space. We prove results on orthogonal and spin bundles on hyperelliptic curves generalising this result.
Measurable selectors for the metric projection
Authors: Cascales B. , Raja M. 
Published: June 2003

AbstractLet Y and Z be two topological spaces and F : Y × Z → ℝ a function that is upper semi–continuous in the first variable and lower semi–continuous in the second variable. If Z is Polish and for every y ∈ Y there is a point z ∈ Z with F(y, z) = infw∈Z F(y, w) we prove that there is a nice measurable function h : Y → Z satisfying F(y, h(y)) = infz∈Z F(y, z) for every y ∈ Y . As an application we obtain the existence of universally measurable selectors for the metric projection onto weakly K–analytic convex proximinal subsets of a Banach space, which then allows us to prove that Lp(μ, Y ) is proximinal in Lp(μ, X) for every proximinal weakly K–analytic subspace Y of a Banach space X.
Composition operators on spaces of real analytic functions
Authors: Domański Paweł , Langenbruch Michael 
Published: June 2003

AbstractLet Ω1, Ω2be open subsets of ℝand ℝ, respectively, and let A(Ω1) denote the space of real analytic functions on Ω1. We prove a Glaeser type theorem by characterizing when a composition operatorCφ: A(Ω1) → A(Ω2),Cφ(f) ≔f∘φ, is a topological embedding. Using this result we characterize when A(Ω1) can be embedded topologically into A(Ω2) as a locally convex space or as a topological algebra. We also characterize LB–subspaces and Fréchet subspaces of A(Ω1). In particular, it follows that if A(Ω1) and A(Ω2) are isomorphic as locally convex spaces, thend1=d2.
On a measure of non–compactness for maximal operators
Authors: Edmunds D. E. , Meskhi A. 
Published: June 2003

AbstractIt is proved that there is no weight pair (v,w) for which the Hardy–Littlewood maximal operator defined on a domain Ω in Rn is compact from the weighted Lebesgue space Lpw(Ω) to Lpv (Ω). Results of a similar character are also obtained for the fractional maximal operators. Moreover, a measure of non–compactness for these maximal operators is estimated from below. Analogous problems for one–sided maximal functions are also studied.
On the radius of convexity of linear combinations of univalent functions and their derivatives
Authors: Greiner Richard , Roth Oliver 
Published: June 2003

AbstractLet S denote the set of normalized univalent functions in the unit disk. We consider the problem of finding the radius of convexity rα of the set{(1 – α)f(z) + αzf′(z) : f ∈ S}for fixed α ∈ ℂ. Using a linearization method we find the exact value of rα for α ∈ [0, 1] and prove the (sharp) estimate rα ≥ r1 for α ∈ ℂ with |2α– 1| ≤ 1. As an application of these results the sharp lower bound for the radius of convexity of the convolution f ∗︁ g where f, g ∈ S and g is close–to–convex is found to be 5 – 2√6. The case α = 1/2 is related to an old conjecture of Robinson dating back to 1947.
On the Picard modular surface for ℚ(√–2) and related Theta constants
Authors: Koike Kenji 
Published: June 2003

AbstractThe family of abelian varieties over C which have the endomorphism √–d of type (n, 1) is parameterized on the complex ball Bn. Let G be a modular group for such a family equipped with a certain level structure. The quotient is called the Picard modular variety of level G. There are many studies on Picard modular varieties (for example, see [2]). But concrete models are known only for the cases d = 1, 3 and 163 (see [3], [6], [7] and [9]). In this paper, we study the Picard modular surface for d = 2.In Section 1, we give an explicit modular embedding Φ : Bn → Hn+1 for d ≡ 1, 2 mod 4. This is inspired by the modular embedding given in [7].In Section 2, we study several congruence subgroups of the Picard modular group G(ℤ) for ℚ(√–2 ) and relations among them. Furthermore we show some special properties of the theta constants restricted on Φ(Bn) with d = 2.In Section 3, we state the main theorem. Namely,(1) We give a birational morphism from \documentclass{article}\usepackage{amssymb}\pagestyle{empty}\begin{document}$ \overline {{\bf B}_2/ G_2(\mathbb Z)} $\end{document} onto a hypersurface in the weighted projective space P(1, 2, 3, 4).(2) We describe the image as an explicit hypersurface of degree 6 defined over ℤ[√2 ].
Higher order birational embeddings of Del Pezzo surfaces
Authors: Knutsen Andreas Leopold 
Published: June 2003

AbstractLet L be a nef line bundle on a Del Pezzo surface. We show that L + KS is birationally k–very ample if and only if all the smooth curves in |L| have gonality ≥k + 2, and we also find numerical criteria for birational k–very ampleness.
Formation of Thermoresponsive Poly(N‐isopropylacrylamide)/Dextran Particles by Atom Transfer Radical Polymerization
Authors: Kim Dong Jin , Heo Jin‐young , Kim Kwang Soo , Choi Insung S. 
Published: June 2003

AbstractThermoresponsive poly(N‐isopropylacrylamide)/dextran hybrid particles were formed by surface‐initiated, aqueous atom transfer radical polymerization via the attachment of a polymerization initiator onto dextran microspheres and polymerization of N‐isopropylacrylamide. The resulting hybrid particles were about 250 μm in diameter, and showed thermoresponsiveness: the average diameter changed from 273 μm to 214 μm when the temperature was increased from 25 °C to 40 °C (22% decrease).Schematic description of the procedure.magnified imageSchematic description of the procedure.
Fabrication of a Metal Particle Array Based on a Self‐Assembled Template from a Two‐Armed Polymer
Authors: Fu Jun , Feng Xiaoshuang , Han Yanchun , Pan Caiyuan , Yang Yuming , Li Binyao 
Published: June 2003

AbstractA two‐armed polymer with a crown ether core self‐assembles to produce macroporous films with pores perpendicularly reaching through the film down to the substrate. A possible assembling mechanism is discussed. The pore size can be conveniently adjusted by changing the solution concentration. These through‐hole macroporous films provide a template for fabricating an array of Cu nanoparticle aggregates.
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