In the Classroom: The Winter Tradition Project (Feb. \u2791)

In an effort to involve all students and to educate them about the cultures of other countries, I developed a winter tradition project. The project required that students write brief descriptions of things their families do during the holidays or winter months. These were compiled into a class booklet. The winter tradition project proved to an excellent activity for middle school students because it allowed them to learn about each other while increasing their writing, computer, and interpersonal skills. I introduced this five-day project to five language arts classes of 20-25 students each

In the Classroom: Poetry in Motion (May \u2791)

Presents a look at several special projects designed by various teachers to foster learning in young children. Includes using a body movement to respond to poetry, creating a `Book-a-Mania\u27 week of instructional and entertaining events, and using logos and street signs to teach reading awareness

In the Classroom: Building Self-Esteem Through Poetry (April \u2791)

Describes the instruction programs devised by various teachers across the nation and the benefits of the programs. Includes building self-esteem through poetry, fostering the connection between art and poetry, and using Caldecott Medal books to motivate independent reading and creative writing

In the Classroom: Creating a Writing-Rich Environment in the Preschool Classroom (Mar. \u2791)

Describes the special teaching strategies developed by various teachers across the nation, including preschool journal writing, creating big books, and teaching comprehension through reading and writing editorials

In the Classroom: Details, Details, Details (Nov. \u2790)

Recounts how several teachers came up with their own solutions to teaching problems involving diverse areas like reading diagnosis, writing workshops, and peer conferencing

The Heisenberg antiferromagnet on a triangular lattice: topological excitations

We study the topological defects in the classical Heisenberg antiferromagnet in two dimensions on a triangular lattice (HAFT). While the topological analysis of the order parameter space indicates that the defects are of $Z_2$ type, consideration of the energy leads us to a description of the low--energy stationary points of the action in terms of $\pm$ vortices, as in the planar XY model. Starting with the continuum description of the HAFT, we show analytically that its partition function can be reduced to that of a 2--dimensional Coulomb gas with logarithmic interaction. Thus, at low temperatures, the correlation length is determined by the spinwaves, while at higher temperatures we expect a crossover to a Kosterlitz--Thouless type behaviour. The results of recent Monte Carlo calculations of the correlation length are consistent with such a crossover.Comment: 9 pages, revtex, preprint: ITP-UH 03/9

Finite-temperature ordering in a two-dimensional highly frustrated spin model

We investigate the classical counterpart of an effective Hamiltonian for a strongly trimerized kagome lattice. Although the Hamiltonian only has a discrete symmetry, the classical groundstate manifold has a continuous global rotational symmetry. Two cases should be distinguished for the sign of the exchange constant. In one case, the groundstate has a 120^\circ spin structure. To determine the transition temperature, we perform Monte-Carlo simulations and measure specific heat, the order parameter as well as the associated Binder cumulant. In the other case, the classical groundstates are macroscopically degenerate. A thermal order-by-disorder mechanism is predicted to select another 120^\circ spin-structure. A finite but very small transition temperature is detected by Monte-Carlo simulations using the exchange method.Comment: 11 pages including 9 figures, uses IOP style files; to appear in J. Phys.: Condensed Matter (proceedings of HFM2006

Negotiating the riskscapes of convenience food

Summary: Addressing the spatial dimensions of risk, this paper examines the multiple ways that consumers negotiate the ëriskscapesí associated with the consumption of convenience food. It explores how convenience food poses a range of risks and potential ways of mitigating those risks. Drawing on empirical research from Germany and the UK, the paper demonstrates how food risks should be contextualized within the practices of everyday life and how consumer understandings of risk differ from expert risk assessments. The paper locates a number of different sites within the riskscape associated with convenience food, going beyond the focus on food safety and security that are the main concerns of health authorities and government advisors. Deicit models of food risk are criticised and alternatives are proposed that emphasise the socially embedded nature of risk within the practices of everyday life

Exogenous application of platelet-leukocyte gel during open subacromial decompression contributes to improved patient outcome

Background: Platelet-leukocyte gel (PLG) is being used during various surgical procedures in an attempt to enhance the healing process. We studied the effects of PLG on postoperative recovery of patients undergoing open subacromial decompression (OSD). Methods: PLG was produced from platelet-leukocyte-rich plasma (P-LRP), prepared from a unit of whole blood. Forty patients were included in the study. Self-assessed evaluations, using the American Shoulder and Elbow Surgeons scoring system of activities of daily living (ADL), joint instability, pain levels, pain medications, and clinical evaluations for range of motion were conducted. Results: Platelet and leukocyte counts were significantly increased in the P-LRP compared to baseline counts. Treated patients demonstrated decreased visual analog scales for pain and used significantly less pain medication, had an improved range of motion during passive forward elevation, external rotation, external rotation with arm at 90 degrees abduction, internal rotation, and cross body adduction compared to control patients (p < 0.001). No differences in the instability score were observed between the groups. Furthermore, treated patients performed more ADL (p < 0.05). Conclusion: In the PLG-treated group, recovery was faster and patients returned earlier to daily activities and also took less pain medication than control subjects

Comparison of Saturated Hydraulic Conductivity Measurement Methods for a Glacial-Till Soil

Hydraulic conductivity is the single most important hydraulic parameter for flow and transport-related phenomena in soil, but the results from different measuring methods vary under different field conditions. To evaluate the performance of four in situ saturated hydraulic conductivity (Ks) measuring methods, Ks measurements were made at four depths (15, 30, 60, and 90 cm) and five locations on a glacial-till soil of Nicollet (fine-loamy, mixed, mesic Aquic Hapludoll)-Clarion (fine-loamy, mixed, mesic Typic Hapludoll) association. The four in situ methods were: (i) Guelph permeameter, (ii) velocity permeameter, (iii) disk permeameter, and (iv) double-tube method. The Ks was also determined in the laboratory on undisturbed soil cores collected from all the five sites and four depths. The Guelph permeameter method gave the lowest Ks values, possibly because of small sample size, whereas the disk permeameter and double-tube methods gave maximum values for Ks with minimum variability, possibly because of large sample size. Maximum variability in Ks values for soil cores at shallow depths may have occurred because of the presence or absence of open-ended macropores. Estimates of Ks, however, are most comparable for the velocity permeameter and the laboratory method using a constant-head permeameter