The Impact of Ethnicity on Executive Functioning in Youth

Executive function can be defined as a group of processes that guide and direct cognitive functions (Isquith, Roth & Gioia, 2013). Relatively little is known about executive function in ethnic minority children. This dissertation examined whether ethnicity predicts performance and parent rating scores on three executive function processes. To date, no study has teased apart the effects of ethnic minority status and its confounding variables in executive function. A total of 134 Caucasian and African American youth between the ages of 11-17 were included in the study. Of those 134 youth, 116 had complete data (both performance-based scores and rating scales) and 18 had rating scales only and no performance-based scores. Results of the current study demonstrate that ethnicity does not predict performance scores or parent-report scores on any executive function after controlling for age, gender, comorbidity, diagnosis, and socioeconomic status. Comorbidity, or number of diagnoses was a significant predictor of performance scores and parent-report scores. Finally, socioeconomic status and age moderated the relationship between rating scales and performance-based measures, with youth over the age of 13 and youth of higher socioeconomic status reporting significantly fewer executive function deficits regardless of their scores on performance-based measures. Executive functions are an integral part of success across settings. There is a continued need to identify variables that impact executive functions in order to implement appropriate interventions

Wide range and tunable linear TMR sensor using two exchange pinned electrodes

A magnetic tunnel junction sensor is proposed, with both the detection and the reference layers pinned by IrMn. Using the differences in the blocking temperatures of the IrMn films with different thicknesses, crossed anisotropies can be induced between the detection and the reference electrodes. The pinning of the sensing electrode ensures a linear and reversible output. It also allows tuning both the sensitivity and the linear range of the sensor. The authors show that the sensitivity varies linearly with the ferromagnetic thickness of the detection electrode. It is demonstrated that an increased thickness leads to a rise of sensitivity and a reduction of the operating range

Lung cancer in lifetime nonsmoking men – results of a case-control study in Germany

Epidemiological studies of lung cancer among nonsmoking men are few. This case–control study was conducted among lifetime nonsmoking men between 1990 and 1996 in Germany to examine lung cancer risk in relation to occupation, environmental tobacco smoke, residential radon, family history of cancer and previous lung disease. A total of 58 male cases with confirmed primary lung cancer and 803 male population controls who had never smoked more than 400 cigarettes in their lifetime were personally interviewed by a standardized questionnaire. In addition, 1-year radon measurements in the living and bedroom of the subjects' last dwelling were carried out. Unconditional logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (CI). Having ever worked in a job with known lung carcinogens was associated with a two-fold significantly increased lung cancer risk (OR = 2.2; Cl = 1.0–5.0), adjusted for age and region. The linear trend test for lung-cancer risk associated with radon exposure was close to statistical significance, demonstrating an excess relative risk for an increase in exposure of 100 Bq m−3 of 0.43 (P = 0.052). Nonsignificantly elevated effects of exposure to environmental tobacco smoke in public transportation and in social settings were observed. No associations with a family history of cancer or previous lung diseases were found. Our results indicate that occupational carcinogens and indoor radon may play a role in some lung cancers in nonsmoking men. © 2001 Cancer Research Campaign http://www.bjcancer.co

How do art teachers describe the ways in which choice-based art lessons may contribute to an inclusive learning environment?

The purpose of this research was to highlight the many different ways art educators in New York City create lessons, prompts, and projects with the use of choice-based lessons. By using a choice-based curriculum students will become empowered to make artworks that best represent them. When working within choice-based parameters an inclusive classroom can emerge. The research is backed by literature, theorists and educators that work or have worked in the field of art education. The topic explores how choice should be at the forefront of lesson making, if educators are interested in creating a classroom that could be seen as inclusive. Data from this study was collected through the process of interviewing three New York City art educators. Findings from this data collection resulted in a clear correlation between choice-based lessons and an inclusive art classroom

An implicit finite element method for discrete dynamic fracture

A method for modeling the discrete fracture of two-dimensional linear elastic structures with a distribution of small cracks subject to dynamic conditions has been developed. The foundation for this numerical model is a plane element formulated from the Hu-Washizu energy principle. The distribution of small cracks is incorporated into the numerical model by including a small crack at each element interface. The additional strain field in an element adjacent to this crack is treated as an externally applied strain field in the Hu-Washizu energy principle. The resulting stiffness matrix is that of a standard plane element. The resulting load vector is that of a standard plane element with an additional term that includes the externally applied strain field. Except for the crack strain field equations, all terms of the stiffness matrix and load vector are integrated symbolically in Maple V so that fully integrated plane stress and plane strain elements are constructed. The crack strain field equations are integrated numerically. The modeling of dynamic behavior of simple structures was demonstrated within acceptable engineering accuracy. In the model of axial and transverse vibration of a beam and the breathing mode of vibration of a thin ring, the dynamic characteristics were shown to be within expected limits. The models dominated by tensile forces (the axially loaded beam and the pressurized ring) were within 0.5% of the theoretical values while the shear dominated model (the transversely loaded beam) is within 5% of the calculated theoretical value. The constant strain field of the tensile problems can be modeled exactly by the numerical model. The numerical results should therefore, be exact. The discrepancies can be accounted for by errors in the calculation of frequency from the numerical results. The linear strain field of the transverse model must be modeled by a series of constant strain elements. This is an approximation to the true strain field, so some error is expected

PatMining - Wege zur Erschließung textueller Patentinformationen für das Technologie-Monitoring

Patent have often been seen as a useful information source for technology monitoring. Nevertheless, analyzing patent information remains a demanding task, and this is largely due to the ever increasing number and extent of patent documents. A very useful tool for dealing with the information overflow in order to analyze textual patent information can be found in the application of semantic patent analysis. Following up on this, approaches to the content-based analysis of textual patent information for technology monitoring are introduced in this thesis. Relating to the usefulness of patent information for technology monitoring, it is shown that technologies are published in patents on a large scale. Furthermore, patents provide information about new technologies at an early stage. From a methodological point of view, the role of design decisions for concept extraction is highlighted. Additionally, semantic patent analysis is adapted for technology monitoring and its specific tasks

Two-electron processes in multiple ionization under strong soft-x-ray radiation

In a combined experimental and theoretical study we have investigated the ionization of atomic argon upon irradiation with intense soft-x-ray pulses of 105 eV photon energy from the free-electron laser FLASH. The measured ion yields show charge states up to Ar7+. The comparison with the theoretical study of the underlying photoionization dynamics highlights the importance of excited states in general and of processes governed by electron correlation in particular, namely, ionization with excitation and shake-off, processes usually inaccessible by measurements of ionic yields only. The Ar7+ yield shows a clear deviation from the predictions of the commonly used model of sequential ionization via single-electron processes and the observed signal can only be explained by taking into account the full multiplet structure of the involved configurations and by inclusion of two-electron processes. The competing process of two-photon ionization from the ground state of Ar6+ is calculated to be orders of magnitude smaller

Coulomb-U and magnetic moment collapse in δ\delta-Pu

The around-the-mean-field version of the LDA+U method is applied to investigate electron correlation effects in $\delta$-Pu. It yields a non-magnetic ground state of $\delta-$Pu, and provides a good agreement with experimental equilibrium volume, bulk modulus and explains important features of the photoelectron spectra

Branching of negative streamers in free flight

We recently have shown that a negative streamer in a sufficiently high homogeneous field can branch spontaneously due to a Laplacian instability, rather than approach a stationary mode of propagation with fixed radius. In our previous simulations, the streamer started from a wide initial ionization seed on the cathode. We here demonstrate in improved simulations that a streamer emerging from a single electron branches in the same way. In fact, though the evolving streamer is much more narrow, it branches after an even shorter propagation distance.Comment: 4 pages, 3 figure