bluuebunny/crossref_metadata_2025_split huggingface dataset:
Composition operators on weighted Bergman spaces of a half-plane
Authors: Elliott Sam J. , Wynn Andrew 
Published: February 2011

AbstractWe use induction and interpolation techniques to prove that a composition operator induced by a map ϕ is bounded on the weighted Bergman space $\mathcal{A}^2_\alpha(\mathbb{H})$ of the right half-plane if and only if ϕ fixes the point at ∞ non-tangentially and if it has a finite angular derivative λ there. We further prove that in this case the norm, the essential norm and the spectral radius of the operator are all equal and are given by λ(2+α)/2.
Analysis of a genetically structured variance heterogeneity model using the Box–Cox transformation
Authors: YANG YE , CHRISTENSEN OLE F. , SORENSEN DANIEL 
Published: February 2011

SummaryOver recent years, statistical support for the presence of genetic factors operating at the level of the environmental variance has come from fitting a genetically structured heterogeneous variance model to field or experimental data in various species. Misleading results may arise due to skewness of the marginal distribution of the data. To investigate how the scale of measurement affects inferences, the genetically structured heterogeneous variance model is extended to accommodate the family of Box–Cox transformations. Litter size data in rabbits and pigs that had previously been analysed in the untransformed scale were reanalysed in a scale equal to the mode of the marginal posterior distribution of the Box–Cox parameter. In the rabbit data, the statistical evidence for a genetic component at the level of the environmental variance is considerably weaker than that resulting from an analysis in the original metric. In the pig data, the statistical evidence is stronger, but the coefficient of correlation between additive genetic effects affecting mean and variance changes sign, compared to the results in the untransformed scale. The study confirms that inferences on variances can be strongly affected by the presence of asymmetry in the distribution of data. We recommend that to avoid one important source of spurious inferences, future work seeking support for a genetic component acting on environmental variation using a parametric approach based on normality assumptions confirms that these are met.
Diversity in the 18S SSU rRNA V4 hyper-variable region ofTheileriaspp. in Cape buffalo (Syncerus caffer) and cattle from southern Africa
Authors: MANS BEN J. , PIENAAR RONEL , LATIF ABDALLA A. , POTGIETER FRED T. 
Published: February 2011

SUMMARYSequence variation within the 18S SSU rRNA V4 hyper-variable region can affect the accuracy of real-time hybridization probe-based diagnostics for the detection ofTheileriaspp. infections. This is relevant for assays that use non-specific primers, such as the real-time hybridization assay forT. parva(Sibekoet al.2008). To assess the effect of sequence variation on this test, theTheileria18S gene from 62 buffalo and 49 cattle samples was cloned and ∼1000 clones sequenced. Twenty-six genotypes were detected which included known and novel genotypes for theT. buffeli, T. mutans, T. taurotragiandT. veliferaclades. A novel genotype related toT.sp. (sable) was also detected in 1 bovine sample.Theileriagenotypic diversity was higher in buffalo compared to cattle. Polymorphism within theT. parvahyper-variable region was confirmed by aberrant real-time melting peaks and supported by sequencing of the S5 ribosomal gene. Analysis of the S5 gene suggests that this gene can be a marker for species differentiation.T. parva, T.sp. (buffalo) andT.sp. (bougasvlei) remain the only genotypes amplified by the primer set of the hybridization assay. Therefore, the 18S sequence diversity observed does not seem to affect the current real-time hybridization assay forT. parva.
Trajectory tracking compensation for teleoperation with transmission delays
Authors: Hu Lingyan , Liu Xiaoping P. , Liu Guoping , Xu Shaoping 
Published: February 2011

SUMMARYThe proper transmission of wave variables rather than power variables in teleoperation with time delays ensures system passivity – rendering the entire system stable, but the introduction of wave variables leads to distortion between the velocities/positions of the master and slave, and the performance deteriorates significantly with the increase of time delays. This paper presents a new compensating scheme implemented at the slave side to remove or cancel partially the distortion. The system passivity can still be maintained by tuning a properly designed low-pass filter. Compared with previous work, the main contribution of this work exists in two points: first, it is the actual velocity/trajectory of the slave rather than the reference velocity/trajectory of the slave that tracks the master one, so the quality of tracking is better and converges faster; second, the proposed compensator does not require any additional signal from the master side, minimizing the amount of data transmitted over the channel, which is very important from the practical point of view. The simulation and experiment results show that the velocity (or trajectory) tracking is significantly improved under the condition of stability, and the force presented to the user is close to the environment one, meaning a high degree of system transparency is achieved.
Inter-island dispersal of flightlessBothrometopus huntleyi(Coleoptera: Curculionidae) from the sub-Antarctic Prince Edward Island archipelago
Authors: Grobler G.C. , Bastos A.D.S. , Chimimba C.T. , Chown S.L. 
Published: February 2011

AbstractBothrometopus huntleyiis a flightless weevil endemic to the volcanically-formed sub-Antarctic Prince Edward Islands archipelago that arose approximately 0.5 million years ago (m.y.a.). Since emergence, a series of volcanic and glaciation events have occurred on Marion Island, whilst Prince Edward Island, the second island constituting the archipelago, has remained largely unaffected by glaciation. Cytochrome oxidase I gene analyses indicate that major historical dispersal events in this species are linked to the geologically discrete histories of these islands and underlie the high haplotype diversity (0.995) recovered for the Prince Edward Islands archipelago. The estimated time to haplotype coalescence of ∼ 0.723 m.y.a. is in keeping with estimated dates of island emergence, and the majority of individuals appear to have descended from a relict, high-altitude population that is still present on Marion Island. The first major inter-island dispersal event occurred ∼ 0.507 m.y.a., coinciding with the oldest dated rocks on Marion Island. Apart from this early inter-island colonization, only one other between-island dispersal event was detected. The genetically discreteB. huntleyicomplexes on each of the islands of the Prince Edward Islands archipelago together with the low levels of inter-island gene flow reaffirm the need to control alien invasive mice, which are restricted to Marion Island, and which prey on this weevil species.
Protein-losing enteropathy: integrating a new disease paradigm into recommendations for prevention and treatment
Authors: Meadows Jeffery , Jenkins Kathy 
Published: February 2011

AbstractProtein-losing enteropathy is a relatively uncommon complication of Fontan procedures for palliation of complex congenital cardiac disease. However, the relative infrequency of protein-losing enteropathy belies the tremendous medical, psychosocial and financial burdens it places upon afflicted patients, their families and the healthcare system that supports them. Unfortunately, because of the complexity and rarity of this disease process, the pathogenesis and pathophysiology of protein-losing enteropathy remain poorly understood, and attempts at treatment seldom yield long-term success. The most comprehensive analyses of protein-losing enteropathy in this patient population are now over a decade old, and re-evaluation of the prevalence and progress in treatment of this disease is needed. This report describes a single institution experience with the evaluation, management, and treatment of protein-losing enteropathy in patients with congenital cardiac disease in the current era, follows with a comprehensive review of protein-losing enteropathy, focused upon what is known and not known about the pathophysiology of protein-losing enteropathy in this patient population, and concludes with suggestions for prevention and treatment.
Neuropsychological Comparison of Children with Heavy Prenatal Alcohol Exposure and an IQ-Matched Comparison Group
Authors: Vaurio Linnea , Riley Edward P. , Mattson Sarah N. 
Published: February 2011

AbstractAn objective in current research on children with fetal alcohol spectrum disorders (FASD) is to determine neurobehavioral profiles to identify affected individuals. Deficits observed when children with FASD are compared to typically developing controls may be confounded by lower IQ scores in the subjects with FASD. To determine if prenatal alcohol exposure is associated with neurobehavioral deficits after controlling for IQ differences, multivariate analyses were conducted to compare alcohol-exposed (ALC) subjects to a comparison group closely matched on IQ (IQC). The initial analysis included a broad neuropsychological battery with measures of language, executive function, visual–motor integration, motor ability, and academic achievement. Additional, in depth comparisons focused on visual sustained attention, verbal learning and memory and parent/guardian-reported behavior problems. Group differences (ALC < IQC) were found on verbal learning and parent-rated behavior problems. Group differences were marginally significant (measures within the broad neuropsychological comparison) or not significant (visual attention, retention of verbal material) on the remaining comparisons. Therefore, some deficits (e.g., verbal learning and behavior problems) in children with heavy prenatal alcohol exposure cannot be explained by the lower FSIQ observed in the population. These areas of relative weakness could be useful in distinguishing children with FASD from other children with lowered IQ. (JINS, 2011, 17, 463–473)
Music Composition as an Act of Cognition: ENACTIV – interactive multi-modal composing system
Authors: Spasov Miroslav 
Published: February 2011

ENACTIV is a project that addresses, explores and offers solutions for converting a performer/composer's expressive sonic and kinetic patterns into continuous variables for driving sound synthesis and processing in real-time interactive composition. The investigation is inspired by the achievements in cognitive science, in particular Umberto Maturana and Francisco Varela's Santiago Theory (1980, 1987), in which the authors explain how the process of cognition arises through ‘structural coupling’ – a mutual influence among living beings, and living beings (humans in particular) and the environment, and how this process stipulates certain patterns of organisation driving the individual's behaviour.The project investigates how a composer/performer's cognitive archetypes, which have been developed via his or her ‘structural coupling’ with the social and natural environment and expressed through voice and unwitting hand gestures, can be associated with or ‘mapped’ onto sound synthesis and processing parameters in such a way that the system will play an active role and act reciprocally, involving a certain degree of variation and unpredictability at its output. The aim of the project is to develop a creative tool which will allow professional musicians, multi-media artists and non-expert participants to engage with multi-modal improvisation in an intuitive way.
Assessment of self-efficacy for caregiving: The critical role of self-care in caregiver stress and burden
Authors: Merluzzi Thomas V. , Philip Errol J. , Vachon Dominic O. , Heitzmann Carolyn A. 
Published: February 2011

AbstractObjective:Little attention has been given to assessing the importance of self-care and communication in the caregiving setting, especially caregiving for those who are terminally ill. The Caregiver Inventory (CGI), a measure of self-efficacy for caregiving that includes these two dimensions, was subjected to psychometric analyses.Method:One hundred and thirty-three primary caregivers completed the CGI; of those, 81 also completed the Perceived Stress Scale (PSS), Caregiver Burden Inventory (CBI), and a measure of caregiver tasks (ADLR-CG). Based on home visits, social workers also rated the caregiver tasks required (ADLR-SW). Exploratory Factor Analysis, as well as reliability and validity analyses were conducted.Results:Fit indices in M + I (V. 5.1) indicated a four factors solution: Managing Medical Information (α = 0.64), Caring for Care Recipient (α = 0.78), Caring for Oneself (α = 0.88), and Managing Difficult Interactions/Emotions (α = 0.76). The CGI was highly negatively related to stress (PSS, r = −0.54, p = 0.001) and burden (CBI, p = −0.37, p = 0.001); ADLR-CG was related to burden (r = 0.43, p = 0.001) but not stress. In regression and relative importance analyses, Care of Oneself and Managing Difficult Interactions/Emotions emerged as equal in terms of having the strongest and most robust negative relationships with stress and burden.Significance of Results:Results suggest that the CGI is a reliable and valid measure of self-efficacy for caregiving, and indicate the importance of self-efficacy for self-care and for managing difficult communication in successfully navigating the demands of caregiving for terminally ill persons.
Prevalence of depression among relatives of cancer patients in Jordan: A cross-sectional survey
Authors: Mhaidat Nizar M. , Ai-Sweedan Suleiman A. , Alzoubi Karem H. , Alazzam Sayer I. , Banihani Mohammed N. , Yasin Muneer O. Bani , Massadeh Majed M 
Published: February 2011

AbstractObjective:Depression is common among chronically ill patients and their relatives. In this article, we investigated the prevalence of depression among relatives of cancer patients in Jordan, and studied the relation between several socio-demographic, disease- and treatment-related factors, together with the occurrence of depression among those relatives.Method:A cross-sectional survey study was conducted at a major university hospital in Jordan. Relatives of cancer patients were interviewed for socio-demographic information, and medical records were checked for information about disease and treatment of patient. Psychological status of the relative was assessed using the Hospital Anxiety & Depression Scale (HADS).Results:The prevalence of depression in our sample was 81.9%. Age and degree of relatedness were significantly correlated with the occurrence of depression among relatives of cancer patients. Significant correlations were also detected between depression among patient's relatives and the stage of the disease. Positive predictive factors for depression included relatives being middle aged, close relatedness, patients being in advanced disease stage, and on chemotherapy or undergoing surgery for cancer treatment.Significance of results:Depression is prevalent among relatives of cancer patients. Therefore, more attention is needed to detect changes in the psychological state of vulnerable relatives of cancer patients, in an effort to reduce the occurrence of depression.
Where do our patients die? A review of the place of death of cancer patients in Cape Town, South Africa
Authors: Manicom Clare 
Published: February 2011

AbstractObjective: A 3-year review of the place of death of patients from a private oncology unit in Cape Town explores the length of time patients spent in acute care hospital beds, under the oncologist's care, prior to their death. Implications for improved staff training, patient support, and family education are identified.Method: This is an exploratory quantitative study that captures details of place of death and particulars of length of acute care hospital stay for cancer patients of a private oncology unit. Data was gathered from 424 patient files, from January 2006 to December 2008, and is interpreted using simple descriptive statistics.Results: Of the 424 recorded deaths, the average age at death was 66.09 years, with lung and bronchial cancer accounting for the leading diagnosis at death (23.82%). Most of patient deaths recorded (42.92%) occurred at home, with death under the oncologist's care in an acute medical ward comprising the second largest category (34.20%). The majority of the patients who died in this ward (38%) died within 3 days of admission.Significance of results: Although medical and community support for end-of-life care at home are not uniformly available to all South Africans, the patients and families in this study had good access to hospice care, and achieved a higher “death at home” rate than that seen in several more developed countries. The review of place of death and length of hospitalization prior to death highlights the need for staff at private oncology units to be trained in and comfortable with palliative care. Attention is also drawn to the very real needs of carers and family members of patients, if death is planned to occur in the patient's home.
Factors affecting hope in a sample of fatigued breast cancer outpatients
Authors: Schjolberg Tore Kr. , Dodd Marylin , Henriksen Nils , Rustoen Tone 
Published: February 2011

AbstractObjective:The aims of this study of women with breast cancer were: to describe the levels of hope and compare hope scores for these patients with a sample from the general Norwegian population; to describe the relationship between hope and fatigue; and finally to evaluate the effect of demographic and clinical characteristics and fatigue on hope.Method:A total of 160 Norwegian outpatients with cancer and fatigue (>2.5 on a 0–10 scale) completed the Herth Hope Index (HHI), Fatigue Questionnaire (FQ), and Self-administered Comorbidity Questionnaire (SCQ).Results:The mean age of the women was 55.3 years (SD = 9.4), 81% lived with someone, and 67% were employed. The most common comorbidities were back pain (42%), osteoarthritis (26%), and headache (19%). The fatigued breast cancer patients reported significantly higher total hope scores than the general Norwegian population (p < .0001). The difference was largest in the individual item “I can see a light in the tunnel,” to which the cancer sample reported the highest scores, but they also felt more “scared about the future.” Total hope score was negatively correlated with total fatigue (TF), mental fatigue (MF), and chronic fatigue (CF), but not with physical fatigue (PF). Demographic and clinical characteristics were not significantly related to hope, except that patients who were married or living with someone showed significantly higher total hope scores.Significance of results:The higher levels of hope in breast cancer patients compared with the general Norwegian population may reflect a response shift in patients after getting a cancer diagnosis. The fact that a significant relationship was found between total hope scores and living arrangements may indicate that hope is easier to establish when patients have someone to relate to or receive support from. Hope and total fatigue were significantly, but weakly correlated.
Culture, institutions and economic growth
Authors: DE JONG EELKE 
Published: February 2011

Abstract:In his article ‘Institutions and Economic Development: Theory, Policy and History’, Ha-Joon Chang rightly argues that historical evidence does not irrefutably suggest that countries characterized by free markets perform better than those in which the state plays a much more prominent role. However, his method of substantiating his claims by means of examples from different sources and periods does not convince. A more systematic and theoretically founded approach is needed. This comment focuses on the cross-section versus time-series approach and the relation between culture, institutions and economic development.
A Trend-Change Extension of the Cairns-Blake-Dowd Model
Authors: Sweeting P. J. 
Published: February 2011

AbstractThis paper builds on the two-factor mortality model known as the Cairns-Blake-Dowd (CBD) model, which is used to project future mortality. It is shown that these two factors do not follow a random walk, as proposed in the original model, but that each should instead be modelled as a random fluctuation around a trend, the trend changing periodically. The paper uses statistical techniques to determine the points at which there are statistically significant changes in each trend. The frequency of change in each trend is then used to project the frequency of future changes, and the sizes of historical changes are used to project the sizes of future changes. The results are then presented as fan charts, and used to estimate the range of possible future outcomes for period life expectancies. These projections show that modelling mortality rates in this way leaves much greater uncertainty over future life expectancy in the long term.
SIR, You've Led Me Astray!
Authors: Birnbaum David , Zarate Roxie , Marfin Anthony 
Published: February 2011

Background.The standardized infection ratio (SIR) is an indirectly standardized morbidity ratio that has been used to compare the infection rate in a hospital with an expected number of infections from a national standard and is being increasingly promoted as a metric for the public reporting of healthcare-associated infections (HAIs).Objective.To identify potential discrepancies between SIR and other measures of risk.Methods.Hypothetical and real data were compared using relative risk, a directly standardized morbidity ratio, and SIR values across a range of varying hospital population compositions.Results.In real and hypothetical data, other summary statistics were consistent with each other and with underlying HAI incidence density rates. However, use of the SIR frequently led to conclusions inconsistent with these other inherently unbiased estimators.Conclusion.Because of a recognized type of distortion inherent in the calculation of indirectly standardized ratios, use of the SIR can lead to conclusions that differ from those reached when using other traditional measures of risk and to incorrect assessments of conclusions about the performance of hospitals or states. In addition, the tendency to inappropriately arrange SIR values in rank order for comparison makes SIR unsuitable as a statewide metric for monitoring HAIs.