A Creative Project in Printmaking Dealing With the Production of a Series of Original Prints Using Multiple Plates Printed in Relief and Intaglio Techniques

It was the purpose of this study to explore and develop technical and aesthetic possibilities resulting from the use of multiple plates in printmaking: 1. by relating the content of separate plates through the combination of shape, color and implied narrative qualities; 2. by developing the contour of the total composition as a secondary visual effect of the multiple plates with no limitation as to media, material, or color within the production of the print

Effect of Humic Acid on Adsorption of Polychlorinated Biphenyls onto Organoclay

Mitigation of risks stemming from contaminated sediments in freshwater and estuarine environments remains an important challenge to the field of environmental science and engineering. Capping sediments with reactive materials is one approach that has recently been the subject of research and development. This research evaluated the use of organoclay as a sorbent in a reactive cap for in situ remediation of contaminated sediments, and provides an original contribution by presenting the sorption characteristics of individual polychlorinated biphenyls (PCB) congeners in the presence of high concentrations of humic acids typical of sediment porewater environments. Sorption of coplanar and noncoplanar PCBs on three commercially available organoclays was studied in this work. Studies were conducted to evaluate the kinetics of adsorption of PCBs on organoclay and to determine the effect of humic acid on the kinetics of adsorption. Isotherm studies were conducted to determine the adsorption affinity of PCBs for organoclays in the presence and absence of humic acid. Studies showed a 45 to 96% reduction in the sorption affinity for organoclays after preloading with high concentrations of humic acid, depending both on the congener and the composition of organoclay. Desorption of PCBs upon addition of humic acid after PCBs were equilibrated with organoclay was statistically significant, although the magnitude of the effect was much smaller than that observed from preloading of humic acid

Evaluation of Activated Carbon as a Reactive Cap Sorbent for Sequestration of PCBs in Presence of Humic Acid

This study investigated the interferences caused by high humic acid concentrations on the adsorption of coplanar and noncoplanar polychlorinated biphenyls (PCBs) on coconut shell activated carbon. In particular, the research focuses on the application of activated carbon as a reactive cap for contaminated sediment sites, a possible intervention to reduce contaminant flux through pore water, and to organisms in aquatic environments. Kinetic and equilibrium studies were conducted using activated carbon as a sorbent for individual PCB congeners including BZ 1, 52, 77, 153, and 169, respectively, in the presence and absence of humic acid. Results showed that preloading of activated carbon with humic acid significantly reduced the adsorption affinity for all selected PCB congeners. Experiments conducted without preloading of activated carbon demonstrated that desorption upon subsequent spiking with humic acid (simulating long-term exposure to pore water that contains high humic acid concentrations) was not found to be statistically significant, and varied with coplanarity of PCBs. Results provide important information for the design of reactive caps in sediments where high concentrations of dissolved organic carbon are found, and highlight the importance of considering site conditions when designing effective reactive caps

Problem-Based Learning as a Model for the Interior Design Classroom: Bridging the Skills Divide Between Academia and Practice

The addition of problem-based learning (PBL) pedagogy to studio-based learning (SBL) environments may help bridge the divide between traditional design education and initial postgraduate jobs. This paper demonstrates how one instructor adapted a PBL model to the interior design studio, including planning, execution, and evaluation. The relationship between PBL and SBL is explored. Two realistic design problems were created for use by interior design students who participated in PBL sessions. All of the groups adequately answered the client’s design programmatic needs. Students learned to perform as team members, including how to collaborate and compromise while working toward an effective design product. The evaluation process was the most challenging component for students. The skills fostered by PBL would be valuable in the workplace

Understanding "poor" performance : Palmetto Achievement Challenge Test (PACT) scores and poverty

This report briefly reviews the movement toward standardized testing systems and the relationship between student poverty and test performance, followed by a presentation of school-level performance on the Palmetto Achievement Challenge Test (PACT) in South Carolina that accounts for the effects of poverty. It concludes with a set of policy implications and recommendations

Malignant Progression in Two Children with Multiple Osteochondromas

Multiple Osteochondromas (MO) is a disease of benign bony growths with a low incidence of malignant transformation. Secondary chondrosarcoma in children is rare even in children with MO. Making a diagnosis of malignancy in low-grade cartilage tumors is challenging and requires consideration of clinical, radiographic, and histopathological factors. We report two cases of skeletally immature patients with MO who presented with rapidly enlarging and radiographically aggressive lesions consistent with malignant transformation. Both underwent allograft reconstruction of the involved site with no signs of recurrence or metastatic disease at a minimum of four-year follow-up