Parenting-Related Stress, Parental Distress, and Youth Health-Related Quality of Life in Families of Youth with Spina Bifida: Parenting Behaviors As Mediators

Research has shown that youth with spina bifida (SB) have poorer psychosocial outcomes, including health-related quality of life (HRQOL), compared to typically developing youth. Demographic and illness-severity factors that may affect HRQOL have been identified, but modifiable factors affecting HRQOL have not yet been identified in this population. Potential modifiable factors include parent factors. In fact, in other pediatric populations, parent factors have been found to impact HRQOL above and beyond illness-severity. This impact may be especially salient for youth with SB, as these youth are more socially isolated and depend on parents for both medical and non-medical caregiving needs. The current study proposes that increases in three parent factors (parent distress, parenting stress, and SB-specific parenting stress) lead to less adaptive parenting behaviors, which, in turn, affect youth HRQOL. The present study addresses gaps in the literature by utilizing a longitudinal, multi-method, and multi-informant research design

Estimating Residual Error by Repeated Measurements

Repeated measurements can be used to estimate the residual error of a measurement process. Residual error, defined as the error remaining after all known sources of error have been accounted for, is what causes differences in the measurement outcome when everything about the measurement process is seemingly identical. Four estimators for the amount of residual error are suggested. These estimators are functions of the outcomes from m repeated measurements on each of n items. Assuming a normal distribution for the residual error, two of the estimators are unbiased estimators for the standard deviation of the residual error, and the third is the maximum likelihood estimator for the standard deviation of the residual error. The fourth is not an estimator for standard deviation, but rather it uses the distance between measurement order statistics as an indicator of the amount of residual error. The efficiencies of the first two estimators and the bias of the maximum likelihood estimator are evaluated. Computations use standard statistical methods and are included in appendices.This work, motivated by the study of machines used to measure the modulus of elasticity of dimension lumber, has been used to assess the performance of this machinery. An example using data from more than 10 years ago and some recent data show that the residual error then was about double that of today for well-tuned, high-speed production-line machinery

Self-Management in Youth with Spina Bifida: Associations with Parent Factors in the Context of a Summer Camp Intervention

Achieving condition-related independence is an important developmental milestone for youth with spina bifida (SB) that can be impacted by a variety of parent factors. This study aimed to investigate (1) the cross-sectional associations between parent factors (adjustment, perceptions, attitudes, behaviors) and youth self-management (e.g., youth\u27s condition-related responsibility and mastery), (2) relations between these same parent factors and changes in youth self-management following participation in a summer camp intervention for one summer, and (3) associations between parent factors and growth in self-management variables over two summers. Participants were 89 camper-parent dyads recruited at a summer camp for youth with SB (Myouth age=12.2 years); 48 families participated across two years. Campers and parents completed assessments at Time 1 (pre-camp) and Time 3 (post-camp) for one or two summers. Parents reported on demographics, their own adjustment, perceptions, and behaviors, and youth with SB\u27s condition-related responsibility and mastery. Youth also reported on condition-related responsibility, and a composite score across both reporters was created. Hierarchical multiple regression analyses and multilevel modeling were used to examine relationships between parent factors and youth self-management. Without covariates, parental overprotection was significantly associated with both camper responsibility and mastery. with covariates, parents\u27 expectations for future goal attainment was the only parent factor significantly positively associated with camper responsibility (β=.63, p\u3c.01) and mastery (β=.22, p\u3c.05), and these associations were moderated by camper age (such that the association was only significant for older campers). When examining changes over one summer, parental expectations for the future were significantly associated with changes in campers\u27 condition-related mastery (β=.31, p\u3c.05). When examining trajectories, parental perception of child vulnerability (PPCV) was significantly negatively associated with the slope of the responsibility growth curve (β=-.01., p\u3c.05), and parents\u27 expectations for future goal attainment was significantly positively associated with the slope of the mastery growth curve (β=.05., p\u3c.05). Parent adjustment was not related to youth self-management. Parent perceptions and behaviors (overprotection, expectations for the future, PPCV) may be important targets for assessment and intervention when promoting condition-related independence for youth with SB

Theory of Drop Formation

We consider the motion of an axisymmetric column of Navier-Stokes fluid with a free surface. Due to surface tension, the thickness of the fluid neck goes to zero in finite time. After the singularity, the fluid consists of two halves, which constitute a unique continuation of the Navier-Stokes equation through the singular point. We calculate the asymptotic solutions of the Navier-Stokes equation, both before and after the singularity. The solutions have scaling form, characterized by universal exponents as well as universal scaling functions, which we compute without adjustable parameters

Interests, Norms, and Support for the Provision of Global Public Goods: The Case of Climate Cooperation

Mitigating climate change requires countries to provide a global public good. This means that the domestic cleavages underlying mass attitudes toward international climate policy are a central determinant of its provision. We argue that the industry-specific costs of emission abatement and internalized social norms help explain support for climate policy. To evaluate our predictions we develop novel measures of industry-specific interests by cross-referencing individuals? sectors of employment and objective industry-level pollution data and employ- ing quasi-behavioral measures of social norms in combination with both correlational and conjoint-experimental data. We find that individuals working in pollutive industries are 7 percentage points less likely to support climate cooperation than individuals employed in cleaner sectors. Our results also suggest that reciprocal and altruistic individuals are about 10 percentage points more supportive of global climate policy. These findings indicate that both interests and norms function as complementary explanations that improve our under- standing of individual policy preferences

Ultrafast Dynamics of Vibrational Symmetry Breaking in a Charge-ordered Nickelate

The ability to probe symmetry breaking transitions on their natural time scales is one of the key challenges in nonequilibrium physics. Stripe ordering represents an intriguing type of broken symmetry, where complex interactions result in atomic-scale lines of charge and spin density. Although phonon anomalies and periodic distortions attest the importance of electron-phonon coupling in the formation of stripe phases, a direct time-domain view of vibrational symmetry breaking is lacking. We report experiments that track the transient multi-THz response of the model stripe compound La$_{1.75}$Sr$_{0.25}$NiO$_{4}$, yielding novel insight into its electronic and structural dynamics following an ultrafast optical quench. We find that although electronic carriers are immediately delocalized, the crystal symmetry remains initially frozen - as witnessed by time-delayed suppression of zone-folded Ni-O bending modes acting as a fingerprint of lattice symmetry. Longitudinal and transverse vibrations react with different speeds, indicating a strong directionality and an important role of polar interactions. The hidden complexity of electronic and structural coupling during stripe melting and formation, captured here within a single terahertz spectrum, opens new paths to understanding symmetry breaking dynamics in solids.Comment: 21 pages, 4 figures; updated version with journal re

Spina Bifida

Spina bifida (SB) is a relatively common congenital birth defect that has a pervasive impact on the physical, neurocognitive, psychological, and social functioning of affected individuals and their families. Given the characteristics of this condition as well as the complexities of medical adherence in this population, pediatric psychologists are uniquely qualified to provide assessment and intervention services to these individuals

Stardust Interstellar Preliminary Examination (ISPE)

In January 2006 the Stardust sample return capsule returned to Earth bearing the first solid samples from a primitive solar system body, C omet 81P/Wild2, and a collector dedicated to the capture and return o f contemporary interstellar dust. Both collectors were approximately 0.1m(exp 2) in area and were composed of aerogel tiles (85% of the co llecting area) and aluminum foils. The Stardust Interstellar Dust Col lector (SIDC) was exposed to the interstellar dust stream for a total exposure factor of 20 m(exp 2-) day during two periods before the co metary encounter. The Stardust Interstellar Preliminary Examination ( ISPE) is a three-year effort to characterize the collection using no ndestructive techniques. The ISPE consists of six interdependent proj ects: (1) Candidate identification through automated digital microsco py and a massively distributed, calibrated search (2) Candidate extr action and photodocumentation (3) Characterization of candidates thro ugh synchrotronbased FourierTranform Infrared Spectroscopy (FTIR), S canning XRay Fluoresence Microscopy (SXRF), and Scanning Transmission Xray Microscopy (STXM) (4) Search for and analysis of craters in f oils through FESEM scanning, Auger Spectroscopy and synchrotronbased Photoemission Electron Microscopy (PEEM) (5) Modeling of interstell ar dust transport in the solar system (6) Laboratory simulations of h ypervelocity dust impacts into the collecting medi

Studies for a Photon Collider at the ILC

One option at the International Linear Collider is to convert the electron beams into high energy photon beams by Compton scattering a few millimetres in front of the interaction region. Selected physics channels for this option have been analysed and technical issues have been studied. So far no showstoppers for this option have been found.Comment: V2: Minor changes, accepted by NI

Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia)

Three Upper Miocene (Pontian) lignite seams are present in the Smederevsko Pomoravlje field (Kostolac Basin, Serbia). The origin of their organic matter (OM), the characteristics of the depositional environment and certain utilisation properties have been evaluated based on petrographic data, bulk organic geochemical parameters, biomarker patterns and their isotope signatures. Moreover, results of isotopic analysis were used for the investigation of the influence of diagenetic aromatisation on delta C-13 signatures of biomarkers. The studied lignites are typical humic coals. The OM of lignites is derived from woody vegetation and herbaceous peat-forming plants, with a strong prevalence of the former. The peat-forming vegetation is dominated by decay resistant conifers, including gymnosperm families Cupressaceae, Taxodiaceae, and Pinaceae. Angiosperms occurred in lower amounts. Minor contribution of ferns, fungi and emergent aquatic macrophyta to the biomass is also evident. Chemoautotrophic- and heterotrophic bacteria played an import role during diagenesis. Diagenetic alterations, associated with change in the number of carbon atoms, influence delta C-13 ratios. Diagenetic aromatisation of di- and non-hopanoid triterpenoids is accompanied with C-13 depletion, whereas aromatisation of hopanoids displays the opposite trend. Peatification proceeded in a fresh water environment under variable, anoxic to slightly oxic redox conditions. The lowermost coal seam III accumulated in a topogenous fresh water peat mire with open water areas, which changed occasionally into a wet forest swamp. This resulted in the deposition of mineral-rich coal. The characteristics of lignite in coal seam II are similar to those of coal seam III. This is supported also by generally similar delta C-13 values of individual biomarkers. Coal seam I is dominated by xylite-rich coal, formed under mesotrophic to ombrotrophic conditions. Rapid flooding of the bogs stopped peat growth in all three coal seams. The ratios of ring-A-degraded and non-degraded aromatic diterpenoids and non-hopanoid triterpenoids, proposed in this study, as well as degree of aromatisation of these biomarkers, reflect changes in the water table. Calorific values of the samples indicate that they meet basic requirements for utilisation in the thermal power plants. None of the lignite samples is suitable for coal briquetting, whereas, based on petrographic data, lignite from coal seam I possesses certain potential for fluidized bed gasification