Case studies to enhance online student evaluation: Bond University – Surveying students online to improve learning and teaching

One of the most sensible ways of improving learning and teaching is to ask the students for feedback. At the end of each teaching period (i.e. semester or term) all universities and many schools survey their students. Usually these surveys are managed online. Questions ask for student perceptions about teaching, assessment and workload. The survey administrators report four common problems

Carbohydrate intake and cardiometabolic risk factors in high BMI African American children.

The aim of this study was to evaluate the relationship between intakes of subgroups of energy-providing carbohydrate, and markers of cardiometabolic risk factors in high BMI African American (AA) children.A cross sectional analysis was performed on data from a sample of 9-11 year old children (n = 95) with BMI greater than the 85th percentile. Fasting hematological and biochemical values for selected markers of cardiometabolic risk factors were related to intakes of carbohydrates and sugars.After adjusting for gender, pubertal stage and waist circumference, multivariate regression analysis showed that higher intakes of carbohydrate (with fat and protein held constant) were associated with higher plasma concentrations of triglycerides (TG), VLDL-C, IDL-C, and worse insulin resistance (homeostasis model assessment of insulin resistance, HOMA-IR). After dividing carbohydrate into non-sugar versus sugar fractions, sugars were significantly related to higher TG, VLDL-C, IDL-C, lower adipocyte fatty acid insulin sensitivity (ISI-FFA), and was closely associated with increased HOMA-IR. Similar trends were observed for sugars classified as added sugars, and for sugars included in beverages. Further dividing sugar according to the food group from which it was consumed showed that consuming more sugar from the candy/soda food group was highly significantly associated with increased TG, VLDL-C, IDL-C and closely associated with increased HOMA-IR. Sugars consumed in all fruit-containing foods were significantly associated with lower ISI-FFA. Sugars consumed as fruit beverages was significantly associated with VLDL-C, IDL-C and ISI-FFA whereas sugars consumed as fresh, dried and preserved fruits did not show significant associations with these markers.Sugars consumed from in all dairy foods were significantly associated with higher TG, VLDL-C and IDL-C, and with significantly lower HDL-C and ISI-FFA. These effects were associated with sugars consumed in sweetened dairy products, but not with sugars consumed in unsweetened dairy products. This analysis suggests that increases in carbohydrate energy, especially in the form of sugar, may be detrimental to cardiometabolic health in high BMI children

Can we explain variations in winery ratings in Victoria?

The scoring of wines and the ratings of wineries is the source of much debate. In this paper we attempt to explain variations in winery ratings in Victoria by examining two winery rating systems, the winery 5-star ratings system of Halliday and the WineBoss version that modifies the Halliday system, to obtain a consensus industry rating from a variety of sources; in conjunction with a limited number of other data about the wineries that are rated. We use ordered logit models and odds ratios on a sample of rated Victorian wineries (291 in the Halliday sample and 331 in the WineBoss sample) to see which predictor variables increase the odds of a winery being in a higher-rated category. Wineries that are older, use a consultant winemaker and/or produce predominantly red wines are more likely to be in a higher-rated category than those wineries that do not; conversely, wineries that use a contract winemaker and/or are located in a number of particular regions of Victoria are more likely to be in a lower-rated category than those wineries that do not. All of these results are as expected and confirm previous research. However, neither the size of the winery in terms of output nor whether the winery has other revenue sources, such as a restaurant, has any significant correlation with winery rating. The paper concludes with some suggestions for further research

J/Psi Production from Electromagnetic Fragmentation in Z decay

The rate for $Z^{0}\to J/ \psi + \ell^{+}\ell^{-}$ is suprisingly large with about one event for every million $Z^{0}$ decays. The reason for this is that there is a fragmentation contribution that is not suppressed by a factor of $M^{2}_{\psi}/M^{2}_{Z}$. In the fragmentation limit $M_{Z}\to\infty$ with $E_{\psi}/M_{Z}$ fixed, the differential decay rate for $Z^{0}\to J/ \psi + \ell^{+}\ell^{-}$ factors into electromagnetic decay rates and universal fragmentation functions. The fragmentation functions for lepton fragmentation and photon fragmentation into $J/\psi$ are calculated to lowest order in $\alpha$. The fragmentation approximation to the rate is shown to match the full calculation for $E_{\psi}$ greater than about $3 M_{\psi}$.Comment: 16 pages and 8 figure

Empirical wind model for the middle and lower atmosphere. Part 1: Local time average

The HWM90 thermospheric wind model was revised in the lower thermosphere and extended into the mesosphere and lower atmosphere to provide a single analytic model for calculating zonal and meridional wind profiles representative of the climatological average for various geophysical conditions. Gradient winds from CIRA-86 plus rocket soundings, incoherent scatter radar, MF radar, and meteor radar provide the data base and are supplemented by previous data driven model summaries. Low-order spherical harmonics and Fourier series are used to describe the major variations throughout the atmosphere including latitude, annual, semiannual, and longitude (stationary wave 1). The model represents a smoothed compromise between the data sources. Although agreement between various data sources is generally good, some systematic differences are noted, particularly near the mesopause. Root mean square differences between data and model are on the order of 15 m/s in the mesosphere and 10 m/s in the stratosphere for zonal wind, and 10 m/s and 4 m/s, respectively, for meridional wind

Viewing an Interdisciplinary Human-Centered Design Course as a Multiteam System: Perspectives on Cooperation and Information Sharing

Many design projects, including human-centered design (HCD) projects, incorporate multiple teams cooperating within what is referred to as a Multiteam System (MTS) environment. These teams mutually rely on resources and processes provided by other teams. As an MTS increases in complexity, knowledge is distributed to more individuals. While effectively distributed knowledge increases creativity and productivity, it is also can hinder team effectiveness. Team members may fail to exchange relevant information or to integrate pertinent information into reasoning for design decisions. Our research addresses information sharing among teams and individuals in HCD by examining interactions between and within the MTS (i.e., instructional team, novice designer or student team, and stakeholder team) in an interdisciplinary design course. Specifically, we used a thematic analysis of design reviews to investigate the influence of information requests toward the quality of the information exchanged, the influence of meeting structure and flow on design team interactions and meeting outcomes, and the influence of information sharing on cooperation within the HCD process. The findings align with previous studies about information sharing in a MTS and also contribute to a broad understanding of how an integrated interpretation of information sharing can influence a cooperative design process, such as HCD. Our analysis also suggests that designers must promote a cooperative decision-making process by eliciting open and unique information relevant to the design goals. Finally, design educators can support the development of novice engineers by improving their understanding of how to elicit information from, and share information, with other teams and stakeholders

One-dimensional conduction in Charge-Density Wave nanowires

We report a systematic study of the transport properties of coupled one-dimensional metallic chains as a function of the number of parallel chains. When the number of parallel chains is less than 2000, the transport properties show power-law behavior on temperature and voltage, characteristic for one-dimensional systems.Comment: 4 pages, 5 figures, submitted to Phys. Rev. Let

Production of Heavy Quarkonium in High Energy Colliders

Recent data from the Tevatron has revealed that the production rate of prompt charmonium at large transverse momentum is orders of magnitude larger than the best theoretical predictions of a few years ago. These surprising results can be understood by taking into account two recent developments that have revolutionized the theoretical description of heavy quarkonium production. The first is the realization that fragmentation must dominate at large transverse momentum, which implies that most charmonium in this kinematic region is produced by the hadronization of individual high-$p_T$ partons. The second is the development of a factorization formalism for quarkonium production based on nonrelativistic QCD that allows the formation of charmonium from color-octet $c \bar c$ pairs to be treated systematically. This review summarizes these theoretical developments and their implications for quarkonium production in high energy colliders.Comment: 45 pages of text and 4 figures. Typset using LaTex. To be published in Annual Review of Nuclear and Particle Science. A postscript version of the file is available at: http://phenom.physics.wisc.edu:80/pub/preprints