Modernizing the Integrated Approach: A Dynamic Teaching Method Using Podcasts and Multimedia Content

This project explores ways to create a curriculum in which multimedia and technology such as podcasts, streaming video, and online articles are utilized effectively in order to develop academic skills for adult international students, specifically those with the goal of attending an American university. Through this integrated approach that combines all of the essential language skills (listening, reading, speaking, and writing), students will build confidence and thus become empowered and individualized learners. They will be able to attain mastery of an essential academic skill set that will assist them in attaining their goals in many different realms. This project engages various learning types and activate students’ interest by creating a flexible and individualized curriculum in which students can draw upon their own interests in order to solidify not only academic writing and reading skills similar to those used in a university but also argumentative abilities, critical thinking skills, and content-based knowledge. Moreover, students will be deeply engaged because the content is modern and relevant and the approach is dynamic

Defect filtering for thermal expansion induced dislocations in III-V lasers on silicon

Epitaxially integrated III-V semiconductor lasers for silicon photonics have the potential to dramatically transform information networks, but currently, dislocations limit performance and reliability even in defect tolerant InAs quantum dot (QD) based lasers. Despite being below critical thickness, QD layers in these devices contain previously unexplained misfit dislocations, which facilitate non-radiative recombination. We demonstrate here that these misfit dislocations form during post-growth cooldown due to the combined effects of (1) thermal-expansion mismatch between the III-V layers and silicon and (2) precipitate and alloy hardening in the active region. By incorporating an additional sub-critical thickness, indium-alloyed misfit dislocation trapping layer, we leverage these mechanical hardening effects to our advantage, successfully displacing 95% of misfit dislocations from the QD layer in model structures. Unlike conventional dislocation mitigation strategies, the trapping layer reduces neither the number of threading dislocations nor the number of misfit dislocations. It simply shifts the position of misfit dislocations away from the QD layer, reducing the defects' impact on luminescence. In full lasers, adding a misfit dislocation trapping layer both above and below the QD active region displaces misfit dislocations and substantially improves performance: we measure a twofold reduction in lasing threshold currents and a greater than threefold increase in output power. Our results suggest that devices employing both traditional threading dislocation reduction techniques and optimized misfit dislocation trapping layers may finally lead to fully integrated, commercially viable silicon-based photonic integrated circuits.Comment: 9 pages, 6 figure

Professionalism and the Millbank Tendency: The Political Sociology of New Labour's employees

This article analyses party employees, one of the most under-researched subjects in the study of British political parties. We draw on a blend of quantitative and qualitative data in order to shed light on the social and political profiles of Labour Party staff, and on the question of their professionalisation. The latter theme is developed through a model derived from the sociology of professions. While a relatively limited proportion of party employees conform to the pure ideal-type of professionalism, a considerably greater number manifest enough of the core characteristics of specialisation, commitment, mobility, autonomy and self-regulation to be reasonably described as 'professionals in pursuit of political outcomes'

Dislocation-induced structural and luminescence degradation in InAs quantum dot emitters on silicon

We probe the extent to which dislocations reduce carrier lifetimes and alter luminescence and growth morphology in InAs quantum dots (QD) grown on silicon. These heterostructures are key ingredients to achieving a highly reliable monolithically integrated light source on silicon necessary for photonic integrated circuits. We find up to 20-30% shorter carrier lifetimes at spatially resolved individual dislocations from both the QD ground and excited states at room temperature using time-resolved cathodoluminescence spectroscopy. These lifetimes are consistent with differences in the intensity measured under steady-state excitation suggesting that trap-assisted recombination limits the minority carrier lifetime, even away from dislocations. Our techniques also reveal the dramatic growth of misfit dislocations in these structures under carrier injection fueled by recombination-enhanced dislocation glide and III-V/Si residual strain. Beyond these direct effects of increased nonradiative recombination, we find the long-range strain field of misfit dislocations deeper in the defect filter layers employed during III-V/Si growth alter the QD growth environment and introduce a crosshatch-like variation in the QD emission color and intensity when the filter layer is positioned close to the QD emitter layer. Sessile threading dislocations generate even more egregious hillock defects that also reduce emission intensities by altering layer thicknesses, as measured by transmission electron microscopy and atom probe tomography. Our work presents a more complete picture of the impacts of dislocations relevant for the development of light sources for scalable silicon photonic integrated circuits.Comment: 15 pages, 6 figure

Pore directionality and correlation lengths of mesoporous silica channels aligned by physical epitaxy

Herein we report on the alignment of mesoporous silica, a potential host for sub-10 nm nanostructures, by controlling its deposition within patterned substrates. In-depth characterization of the correlation lengths (length of a linear porous channel), defects of the porous network (delamination), and how the silica mesopores register to the micrometer-sized substrate pattern was achieved by means of novel focused ion beam (FIB) sectioning and in situ SEM imaging, which to our knowledge has not previously been reported for such a system. Our findings establish that, under confinement, directed deposition of the sol within channeled substrates, where the cross-sectional aspect ratio of the channels approaches unity, induces alignment of the mesopores along the length of the channels. The pore correlation length was found to extend beyond the micrometer scale, with high pore uniformity from channel to channel observed with infrequent delamination defects. Such information on pore correlation lengths and defect densities is critical for subsequent nanowire growth within the mesoporous channels, contact layout (electrode deposition etc.), and possible device architectures

Adolescent tuberculosis.

Adolescence is characterised by a substantial increase in the incidence of tuberculosis, a known fact since the early 20th century. Most of the world's adolescents live in low-income and middle-income countries where tuberculosis remains common, and where they comprise a quarter of the population. Despite this, adolescents have not yet been addressed as a distinct population in tuberculosis policy or within tuberculosis treatment services, and emerging evidence suggests that current models of care do not meet their needs. This Review discusses up-to-date information about tuberculosis in adolescence, with a focus on the management of infection and disease, including HIV co-infection and rifampicin-resistant tuberculosis. We outline the progress in vaccine development and highlight important directions for future research

Anomalous dimensions of operators in polarized deep inelastic scattering at O(1/N_f)

Critical exponents are computed for a variety of twist-2 composite operators, which occur in polarized and unpolarized deep inelastic scattering, at leading order in the 1/N_f expansion. The resulting d-dimensional expressions, which depend on the moment of the operator, are in agreement with recent explicit two and three loop perturbative calculations. An interesting aspect of the critical point approach which is used, is that the anomalous dimensions of the flavour singlet eigenoperators, which diagonalize the perturbative mixing matrix, are computed directly. We also elucidate the treatment of gamma^5 at the fixed point which is important in simplifying the calculation for polarized operators. Finally, the anomalous dimension of the singlet axial current is determined at O(1/N_f) by considering the renormalization of the anomaly in operator form.Comment: 22 latex pages plus 7 figure

The Vehicle, Fall 2008

Table of Contents DwIFoFErREINdTPhilip Gallagherpage 17 LeftoversAmanda Vealepage 18 the bogGrace Lawrencepage 19 Visitor\u27s Morning on EarthSteven T. Coxpage 20 The Moon Man Philip Gallagherpage 21 SearchingsAmanda Vealepage 23 Becoming WiseAmanda Vealepage 24 PerennialsAmanda Vealepage 26 SoldierMary Lieskepage 27 Desecration of a RelicAmanda Vealepage 29 New LifeJennifer O\u27Neilpage 30 GardenerKrystina Levyapage 43 The Reasons WhyMary Lieskepage 44 Dining at the MortuaryAmanda Vealepage 45 Poetry Hop Scotch BehopJake Dawsonpage 1 Empty RoomAmanda Vealepage 2 Mantis (from memory) Muddy ShoesGina Marie LoBiancopage 3 MEMOSamuel Clowardpage 5 MathMary Lieskepage 7 To a Little Black GirlJustin Sudkamppage 8 Government OfficeSamuel Clowardpage 9 FirstKellen Fasnachtpage 10 Seeing Artichoke, Call MeAmanda Vealepage 11 TrumpetSarah Fairchildpage 12 That\u27s the StuffJake Dawsonpage 13 Your Hair is ThinningAmanda Vealepage 15 UnableDonica Millerpage 16 Dance PartnersSamantha Sauerpage 32 I StillMegan Mathypage 33 IncandescenceSarah Fairchildpage 34 Stone CraneBrendan Hughespage 35 The Road TakenSamantha Sauerpage 36 YouMegan Mathypage 37 Zhangjiajie National Forest Park, Zhangjiajie, ChinaBrendan Hughespage 38 Spotlight on 2008 Chapbook LessonsGlen Davispage 62 Interview with Glen DavisRebecca Griffithpage 64 Contributorspage 69 Submission Guidelines/Reading Event Blues Mad FoolJake Dawsonpage 47 Good WomanJake Dawsonpage 49 Good ManJake Dawsonpage 51 And I Miss YouDonica Millerpage 53 Entropy of Your ShirtAmanda Vealepage 56 Mavericks Philip Gallagherpage 57 Untitled [It\u27s 10:15 p.m....]Philip Gallagherpage 59 Prose A Birdhouse for GrandpaLeslie Hancockpage 39 MotivationMary Lieskepage 55 Art Forgotten GardenBrendan Hughescovers BeMegan Mathypage 31https://thekeep.eiu.edu/vehicle/1088/thumbnail.jp

Exact Renormalization Group Equations. An Introductory Review

We critically review the use of the exact renormalization group equations (ERGE) in the framework of the scalar theory. We lay emphasis on the existence of different versions of the ERGE and on an approximation method to solve it: the derivative expansion. The leading order of this expansion appears as an excellent textbook example to underline the nonperturbative features of the Wilson renormalization group theory. We limit ourselves to the consideration of the scalar field (this is why it is an introductory review) but the reader will find (at the end of the review) a set of references to existing studies on more complex systems.Comment: Final version to appear in Phys. Rep.; Many references added, section 4.2 added, minor corrections. 65 pages, 6 fig

Glycoprotein Acetyls : A Novel Inflammatory Biomarker of Early Cardiovascular Risk in the Young

Background Low-grade inflammation in the young may contribute to the early development of cardiovascular disease. We assessed whether circulating levels of glycoprotein acetyls (GlycA) were better able to predict the development of adverse cardiovascular disease risk profiles compared with the more commonly used biomarker high-sensitivity CRP (C-reactive protein). Methods and Results A total of 3306 adolescents and young adults from the Avon Longitudinal Study of Parents and Children (mean age, 15.4 +/- 0.3; n=1750) and Cardiovascular Risk in Young Finns Study (mean age, 32.1 +/- 5.0; n=1556) were included. Baseline associations between inflammatory biomarkers, body composition, cardiovascular risk factors, and subclinical measures of vascular dysfunction were assessed cross-sectionally in both cohorts. Prospective risk of developing hypertension and metabolic syndrome during 9-to-10-year follow-up were also assessed as surrogate markers for future cardiovascular risk. GlycA showed greater within-subject correlation over 9-to-10-year follow-up in both cohorts compared with CRP, particularly in the younger adolescent group (r=0.36 versus 0.07). In multivariable analyses, GlycA was found to associate with multiple lifestyle-related cardiovascular disease risk factors, cardiometabolic risk factor burden, and vascular dysfunction (eg, mean difference in flow-mediated dilation=-1.2 [-1.8, -0.7]% per z-score increase). In contrast, CRP levels appeared predominantly driven by body mass index and showed little relationship to any measured cardiovascular risk factors or phenotypes. In both cohorts, only GlycA predicted future risk of both hypertension (risk ratio [RR], approximate to 1.1 per z-score increase for both cohorts) and metabolic syndrome (RR, approximate to 1.2-1.3 per z-score increase for both cohorts) in 9-to-10-year follow-up. Conclusions Low-grade inflammation captured by the novel biomarker GlycA is associated with adverse cardiovascular risk profiles from as early as adolescence and predicts future risk of hypertension and metabolic syndrome in up to 10-year follow-up. GlycA is a stable inflammatory biomarker which may capture distinct sources of inflammation in the young and may provide a more sensitive measure than CRP for detecting early cardiovascular risk.Peer reviewe