bluuebunny/crossref_metadata_2025_split huggingface dataset:
You're all grown up now: Termination of foster care support at age 18
Authors: Avery Rosemary J. , Freundlich Madelyn 
Published: August 2008

ABSTRACTThis article considers the repercussions of discharging youth from foster care at age 18 based on recent research demonstrating that youth at this age are not developmentally prepared to live independently and have a continued need for strong social scaffolding during emerging adulthood. Drawing upon recent research findings, we make recommendations for changes to state and federal policy that provide youth transitioning from foster care an extension of federal/state financial and social support into the third decade of life. We argue for a re‐conceptualization of “independent living” as “interdependent living,” and recommend that policymakers require a permanent committed adult be identified for each youth prior to discharge from foster care.
Brief report: The defense mechanisms of homophobic adolescent males: A descriptive discriminant analysis
Authors: Lewis Andrew J. , White Jennifer 
Published: August 2008

ABSTRACTThe study examined the role of defense mechanisms in homophobic attitudes of older male adolescents aged 17–18 years. A cross‐sectional survey collected data from final year high school students (N = 86) attending an all male school in a regional centre in Victoria, Australia. The school was identified by teachers as having a problematic culture of homophobic intolerance. Participants were divided into homophobic and non‐homophobic groups based on their scores on the Homophobia Scale Questionnaire. Discriminant analysis was conducted to identify the predictors that would best categorise students into those two groups on the basis of defense styles derived from the Defense Style Questionnaire‐40 (DSQ‐40). The strongest predictors of homophobia amongst defense styles were idealisation, denial, somatisation and devaluation accounting for 18.31%, 17.64%, 13.10% and 11.35% of the variance, respectively. Results generally supported the larger contribution of more immature defenses to higher levels of homophobia.
THE JOINT SIMILARITY PROBLEM FOR WEIGHTED BERGMAN SHIFTS
Authors: Ferguson Sarah H. , Petrovic Srdjan 
Published: August 2008

AbstractWe solve a joint similarity problem for pairs of operators of Foias–Williams/Peller type on weighted Bergman spaces. We show that for the single operator, the Hardy space theory established by Bourgain and Aleksandrov–Peller carries over to weighted Bergman spaces, by establishing the relevant weak factorizations. We then use this fact, together with a recent dilation result due to the first author and Rochberg, to show that a commuting pair of such operators is jointly polynomially bounded if and only if it is jointly completely polynomially bounded. In this case, the pair is jointly similar to a pair of contractions by Paulsen’s similarity theorem.AMS 2000 Mathematics subject classification: Primary 47B35; 47B47
EMBEDDING ℐn IN A 2-GENERATOR INVERSE SUBSEMIGROUP OF ℐn+2
Authors: McAlister D. B. , Stephen J. B. , Vernitski A. S. 
Published: August 2008

AbstractGiven an integer $n$, we show that $\mathcal{I}_{n}$ embeds in a 2-generated subsemigroup of $\mathcal{I}_{n+2}$, which is an inverse semigroup. An immediate consequence of this result is the following, which is analogous to the case for groups and semigroups: every finite inverse semigroup may be embedded in a finite 2-generated semigroup which is an inverse semigroup.AMS 2000 Mathematics subject classification: Primary 20M18. Secondary 20M20
MAXIMAL FUNCTIONS AND SUBORDINATION FOR OPERATOR GROUPS
Authors: Blower Gordon 
Published: August 2008

AbstractLet $E$ be a UMD Banach space, and $L$ a positive self-adjoint operator in $\mathrm{L}^2$ of Laplace type, for which the imaginary powers $L^{-\ri t}$ form a $C_0$-group of exponential growth $0\leq\alpha\lt \pi$ on $\mathrm{L}^p(E)$, where $1\lt p\lt\lt \infty$. Suppose $G(z)$ is holomorphic inside and on the boundary of the sector $\{z:z\neq0,\ |\arg z|\leq\phi\}$, and $z^\kappa G(z)\rightarrow0$ uniformly as $z\rightarrow\infty$ for some $\kappa\gt0$ and $\phi\gt\alpha$. Then $G(tL)$ $(t \gt0)$ defines a bounded family of linear operators on $\mathrm{L}^p(E)$; and the maximal operator $f\mapsto\sup_{t \gt 0}\|G(tL)f\|_E$ is bounded on the domain of $\log L$. The proof uses transference methods. These hypotheses hold for the maximal solution operators for the heat, wave and Schrödinger equations, and for Cesàro sums.AMS 2000 Mathematics subject classification: Primary 47D03; 42B25; 47D09
SOME BASIC RESULTS FOR PROPER FREE G-MANIFOLDS, WHERE G IS A DISCRETE GROUP
Authors: Kankaanrinta Marja 
Published: August 2008

AbstractLet $G$ be a countable discrete group and let $M$ be a proper free $C^r$ $G$-manifold and $N$ a $C^r$ $G$-manifold, where $1\leq r\leq\omega$. We prove that if $G$ acts properly and freely also on $N$ and if $\dim(N)\geq2\dim(M)$, then equivariant immersions form an open dense subset in the space $C^r_G(M,N)$ of all equivariant $C^r$ maps from $M$ to $N$. The space $C^r_G(M,N)$ is equipped with a topology, which coincides with the Whitney $C^r$ topology if $G$ is finite and is suited to studying equivariant maps. We also prove an equivariant version of Thom’s transversality theorem and show that $C^\omega_G(M,N)$ is dense in $C^r_G(M,N)$, for $1\leq r\leq\infty$.AMS 2000 Mathematics subject classification: Primary 57S20
ON THE MAIN INVARIANT OF ELEMENTS ALGEBRAIC OVER A HENSELIAN VALUED FIELD
Authors: Aghigh Kamal , Khanduja Sudesh K. 
Published: August 2008

AbstractLet $v$ be a henselian valuation of a field $K$ with value group $G$, let $\bar{v}$ be the (unique) extension of $v$ to a fixed algebraic closure $\bar{K}$ of $K$ and let $(\tilde{K},\tilde{v})$ be a completion of $(K,v)$. For $\alpha\in\bar{K}\setminus K$, let $M(\alpha,K)$ denote the set $\{\bar{v}(\alpha-\beta):\beta\in\bar{K},\ [K(\beta):K] \lt [K(\alpha):K]\}$. It is known that $M(\alpha,K)$ has an upper bound in $\bar{G}$ if and only if $[K(\alpha):K]=[\tilde{K}(\alpha):\tilde{K}]$, and that the supremum of $M(\alpha,K)$, which is denoted by $\delta_{K}(\alpha)$ (usually referred to as the main invariant of $\alpha$), satisfies a principle similar to the Krasner principle. Moreover, each complete discrete rank 1 valued field $(K,v)$ has the property that $\delta_{K}(\alpha)\in M(\alpha,K)$ for every $\alpha\in\bar{K}\setminus K$. In this paper the authors give a characterization of all those henselian valued fields $(K,v)$ which have the property mentioned above.AMS 2000 Mathematics subject classification: Primary 12J10; 12J25; 13A18
A GENERALIZATION OF THE WIDDER–ARENDT THEOREM
Authors: Chojnacki Wojciech 
Published: August 2008

AbstractWe establish a generalization of the Widder–Arendt theorem from Laplace transform theory. Given a Banach space $E$, a non-negative Borel measure $\mea$ on the set $\Rplus$ of all non-negative numbers, and an element $\bnd$ of $\R\cup\{-\infty\}$ such that $\natres{-\coefl}$ is $\mea$-integrable for all $\coefl>\bnd$, where $\natres{-\coefl}$ is defined by $\natres{-\coefl}(t)=\exp(-\coefl t)$ for all $t\in\Rplus$, our generalization gives an intrinsic description of functions $\f\colon\Set\to E$ that can be represented as $\f(\coefl)=T(\natres{-\coefl})$ for some bounded linear operator $T\colon\Ma\to E$ and all $\coefl> \bnd$; here $\Ma$ denotes the Lebesgue space based on $\mea$. We use this result to characterize pseudo-resolvents with values in a Banach algebra, satisfying a growth condition of Hille–Yosida type.AMS 2000 Mathematics subject classification: Primary 44A10; 47A10. Secondary 43A20; 46B22; 46G10; 46J25; 47D06
ALGEBRAIC CURVES, RIEMANN SURFACES AND KLEIN SURFACES WITH NO NON-TRIVIAL AUTOMORPHISMS OR SYMMETRIES
Authors: Turbek Peter 
Published: August 2008

AbstractThe explicit defining equations of a new family of curves whose members have a trivial automorphism group are given. Each member is defined for characteristic zero and all but a finite number of characteristics greater than zero. This family, in conjunction with a previously appearing family of the author’s, provides explicit examples of algebraic curves which possess only the trivial automorphism for each genus greater than three. The family is then used to construct Riemann surfaces without anticonformal automorphisms and Klein surfaces with no non-trivial automorphisms.AMS 2000 Mathematics subject classification: Primary 14H37; 30F50; 30F99
CODIFYING TORT LAW: LESSONS FROM THE PROPOSALS FOR REFORM OF THE FRENCH CIVIL CODE
Authors: Giliker Paula 
Published: August 2008

AbstractThis article deals with a topic at the heart of modern comparative law: codification of private law on a national and European level. It offers a critical assessment of the recent French attempt to redraft the obligations provisions of its civil code, focusing on the revisions to the law of tort or delict. There has been little analysis of these provisions within or outside France. This article examines the key changes proposed and identifies the implications in terms of tort policy.
Detection of QTL for milk protein percentage in Italian Friesian cattle by AFLP markers and selective genotyping
Authors: Milanesi Elisabetta , Negrini Riccardo , Schiavini Fausta , Nicoloso Letizia , Mazza Raffaele , Canavesi Fabiola , Miglior Filippo , Valentini Alessio , Bagnato Alessandro , Ajmone-Marsan Paolo 
Published: August 2008

We targeted quantitative trait loci (QTL) for milk protein percentage (P%) in two Italian Holstein granddaughter design families using selective genotyping in combination with high throughput amplified fragment length polymorphism (AFLP) markers. A total of 64 extreme high and low sires in respect to estimated breeding value (EBV) for P% (EBVP%) were genotyped with 25 AFLP primer combinations that revealed 305 and 291 polymorphisms in the two families. Association between markers and EBVP% was investigated by a linear model only on bands having paternal origin (105 and 96 AFLP bands in family D and S, respectively). Although no marker was significantly associated with the target trait after correction for multiple comparisons, 17 AFLP markers, significant without correction for multiple tests, were considered suggestive of the presence of a QTL. Eleven of these were successfully located on sixBos taurus(BTA) chromosomes by radiation hybrid or in-silico mapping. Ten of these mapped in the immediate neighbourhood (less than 10 cM) of already described QTL for P%. Suggestive association was verified in four regions by microsatellites analysis: one on BTA 10; one on BTA 28; and two on BTA 18. Microsatellites identified significant effects by single marker and interval mapping analyses on BTA 10 and BTA 28, while they were only suggestive of the presence of QTL on BTA 18. In summary, our results firstly indicate that AFLP markers may be used to seek QTL exploiting a selective genotyping approach in GDD, a wide used experimental design in cattle; secondly, propose two approaches for AFLP mapping, namely in-silico mapping exploiting most updated release from the bovine whole genome sequencing project, and physical mapping exploiting a panel of Bovine/Hamster Radiation Hybrids; and thirdly, provide new information on QTLs for an economic important trait in a never investigated Holstein cattle population. AFLP in combination with selective genotyping can be a useful strategy for QTL searching in minor livestock species, sometimes having large economic impact in marginal areas, where more informative markers are still poorly developed.
Effect of diet supplementation with sunflower oil on milk production, fatty acid profile and ruminal fermentation in lactating dairy ewes
Authors: Hervás Gonzalo , Luna Pilar , Mantecón Ángel R. , Castañares Natalia , de la Fuente Miguel Angel , Juárez Manuela , Frutos Pilar 
Published: August 2008

The aim of this research was to enhance the nutritional quality of ewe milk fat by increasing potentially healthy fatty acids (FA) through diet supplementation with unprotected oil rich in linoleic acid, and without detrimental effects on animal performance. Twenty-four ewes were assigned to two high concentrate diets, control or supplemented with 6% sunflower oil (SO), for 4 weeks. No differences between treatments were found in milk production and dry matter intake. Although the SO diet increased milk fat percentage and tended to reduce milk protein concentration, it did not affect milk fat, protein or total solid yield. Most of the modifications in milk FA composition were addressed toward a potentially healthier profile: a decrease in C12:0 to C16:0 and a remarkable increase in the contents of cis-9 trans-11 C18:2 (from 0·94 to 3·60 g/100 g total FA) and trans-11 C18:1 (from 2·23 to 8·61 g/100 g total FA). Furthermore, the levels reached were maintained throughout the period monitored. However, the SO diet increased other trans C18:1 isomer percentages, too. The lack of differences between treatments in the in vitro ruminal fermentation parameters, studied with batch cultures of rumen microorganisms, would indicate no negative effects on ruminal fermentation.
Selection pressure towards monoxeny in Camallanus cotti (Nematoda, Camallanidae) facing an intermediate host bottleneck situation
Authors: LEVSEN A. , JAKOBSEN P. J. 
Published: August 2008

This paper describes the ability of the Asian fish nematode Camallanuscotti to carry out both heteroxeny, i.e. an indirect life-cycle using copepods as intermediate host, and monoxeny, i.e. direct infection and development in the definitive fish host. C. cotti occurs naturally in various freshwater teleosts in Asia. During the past decades it has been disseminated into closed or semi-closed aquaculture systems and aquaria around the world, mainly due to the ornamental fish trade. Under such conditions the species may frequently face a bottleneck situation with regard to the availability of copepods. It is known that C. cotti may reproduce and persist in copepod-free aquaria for several months. In order to investigate whether C. cotti has selected towards monoxeny in water systems lacking copepods, in contrast to the opposite selection pressure when copepods are present, 2 separate infection trials were run. It was shown that the parasite can infect the fish host both indirectly via copepods, and directly. However, C. cotti has significantly higher fitness, expressed as survival to maturity, when transmitted indirectly compared to the direct transmission mode. We suggest that the ability of aquarium populations of C. cotti to carry out a direct life-cycle is favoured by selection in order to avoid extinction whenever copepods are absent. It still remains unknown, however, whether the parasite shows the same characteristics in the wild.
The time-course of the response to the FMRFamide-related peptide PF4 in Ascaris suum muscle cells indicates direct gating of a chloride ion-channel
Authors: PURCELL J. , ROBERTSON A. P. , THOMPSON D. P. , MARTIN R. J. 
Published: August 2008

We investigated the effects of PF4 on Ascaris suum somatic muscle cells using a 2 electrode current-clamp technique. PF4 is a FaRP (FMRFamide-related peptide), originally isolated from the free-living nematode Panagrellus redivivus. PF4 caused hyperpolarization and an increase in chloride ion conductance when it was applied to the muscle cells of the Ascaris body wall. The delay between the application of the peptide and the appearance of the response was measured and compared with that of gamma-amino butyric acid (GABA), a compound that directly gates ion channels, and with PF1, a FaRP that acts via an intracellular signal transduction mechanism. The PF4 and GABA delay times were not significantly different; they were 1·51±0·11 sec and 1·22±0·10 sec respectively. The delay following application of PF1, 3·75±0·51 sec, was significantly longer. The rapid response to PF4 is consistent with direct gating of a chloride ion channel, which has not been described elsewhere in the literature.
Comparison of the structures of natural and re-established populations of Ascaris in humans in a rural community of Jiangxi, China
Authors: PENG W. , ZHOU X. , CUI X. 
Published: August 2008

To compare the structures of natural and re-established populations of Ascaris in humans, universal (mass) chemotherapy was carried out at the beginning and the end of the study year using pyrantel pamoate. Worms expelled within 48 h of treatment were collected, their sex determined, and measurements made of length, width and weight. Length was used as the criterion for estimating the developmental stage of the worms. In comparison with the natural population, the re-established population displayed similar sex ratio as well as distribution patterns among individuals and age groups of the host. However, the mean worm burden of the re-established population was significantly decreased, with a reduction of burdens in children aged 5–9 years. Also, the re-established population showed significant changes in population structure and worm measurements in that it comprised more immature and less fertile males, less fertile and more senile females, smaller and lighter males, larger (but not heavier) females than the natural population. The results suggested that the re-established Ascaris population did not restore to its original status in relation to mean density, composition and fecundity. Therefore, universal treatment once a year should decrease the transmission of Ascaris in humans. Combined with previous results for the same study sites, the present findings also indicated that caution is warranted to avoid misleading conclusions when using prevalence and faecal egg counts as parameters for evaluating the success of control programmes.
Evolutionary history ofTrypanosoma cruziaccording to antigen genes
Authors: ROZAS M. , DE DONCKER S. , CORONADO X. , BARNABÉ C. , TIBYARENC M. , SOLARI A. , DUJARDIN J.-C. 
Published: August 2008

SUMMARYTrypanosoma cruzi, the agent of Chagas disease is associated with a very high clinical and epidemiological pleomorphism. This might be better understood through studies on the evolutionary history of the parasite. We explored here the value of antigen genes for the understanding of the evolution withinT. cruzi. We selected 11 genes and 12 loci associated with different functions and considered to be involved in host-parasite interaction (cell adhesion, infection, molecular mimicry). The polymorphism of the respective genes in a sample representative of the diversity ofT. cruziwas screened by PCR-RFLP and evolutionary relationships were inferred by phenetic analysis. Our results support the classification ofT. cruziin 2 major lineages and 6 discrete typing units (DTUs). The topology of the PCR-RFLP tree was the one that better fitted with the epidemiological features of the different DTUs: (i) lineage I, being encountered in sylvatic as well as domestic transmission cycles, (ii) IIa/c being associated with a sylvatic transmission cycle and (iii) IIb/d/e being associated with a domestic transmission cycle. Our study also supported the hypothesis that the evolutionary history ofT. cruzihas been shaped by a series of hybridization events in the framework of a predominant clonal evolution pattern.
An experimental investigation of hypervigilance for threat in children and adolescents with post-traumatic stress disorder
Authors: DALGLEISH T. , MORADI A. R. , TAGHAVI M. R. , NESHAT-DOOST H. T. , YULE W. 
Published: August 2008

Background. The present study examined biases in visual attention for emotional material in children and adolescents with post-traumatic stress disorder (PTSD) and healthy controls.Methods. The participants carried out an attentional deployment task in which probe detection latency data were used to determine the distribution of visual attention for threat-related and depression-related material.Results. The results showed that children and adolescents with PTSD, relative to controls, selectively allocated processing resources towards socially threatening stimuli and away from depression-related stimuli. This attentional avoidance of depression-related information in the PTSD participants declined with age.Conclusions. The results of the study are interpreted as a consolidation and extension of previous research on attentional bias and emotional disorder in younger participants.
The context of delusional experiences in the daily life of patients with schizophrenia
Authors: MYIN-GERMEYS I. , NICOLSON N. A. , DELESPAUL P. A. E. G. 
Published: August 2008

Background. Global characteristics and psychosocial risk factors related to delusions have been identified. The present study extends these findings to the level of everyday functioning, identifying characteristics of delusional moments (DMs) and contextual risk and protective factors for delusional exacerbations in daily life.Methods. Data were collected using the Experience Sampling Method (ESM), a time-sampling technique. Forty-eight chronic patients diagnosed with schizophrenia rated the intensity of pathological symptoms and mood states and described their thoughts and the environmental context during consecutive moments in daily life. Delusions were defined on the basis of self-rated suspicion, preoccupation, feeling controlled, and coded thought pathology. Daily context included current activity, persons present and location. Characteristics of DMs and non-delusional moments (nDMs) were compared, and a multilevel logistic regression model was used to identify contexts that might trigger or prevent DMs.Results. On average, patients experienced delusions less than one-third of the time. DMs were characterized by higher negative affect and lower positive affect. The presence of family or acquaintances decreased the risk of subsequently experiencing a DM, whereas withdrawal from activities increased this risk.Conclusions. Data support the validity of ESM for investigating delusions in schizophrenia. Daily life contexts appear to alter the probability that delusions will occur. Knowledge about such contexts may therefore be useful in helping patients develop better coping strategies and in creating therapeutic interventions that can lessen emotional distress.
The longitudinal effect of depression on functional limitations and disability in older adults: an eight-wave prospective community-based study
Authors: GEERLINGS S. W. , BEEKMAN A. T. F. , DEEG D. J. H. , TWISK J. W. R. , VAN TILBURG W. 
Published: August 2008

Background. The temporal relationship between depression and adverse functional outcomes in older adults is ambiguous. In the present eight-wave prospective community-based study, the longitudinal effect of depression on functional limitations and disability (in terms of disability days and bed days) was studied, thereby taking into account the role of chronic physical diseases.Methods. The study is based on a sample which at the outset consisted of 325 non-depressed and 327 depressed persons (55–85 years) drawn from a larger random community based sample in the Netherlands. Generalized estimating equations time-lag models were used to examine the longitudinal relation between depression and both functional limitations and disability.Results. Functional limitations were very persistent over time, whereas disability days and bed days were more fluctuating functional outcomes. Only in the presence of chronic physical diseases, there was a significant longitudinal association between depression at the previous measurement and functional limitations, disability days and bed days at the next measurement. The effect on functional limitations was small, which was probably partly due to their persistent nature.Conclusions. The finding of a longitudinal relationship between depression and functional outcomes in older adults with a compromised health status provides a rationale for treatment of chronic physical diseases as well as depression in depressed chronically ill elderly, in order to prevent a spiralling decline in psychological and physical health.