Time filter

Source Type

Frederick, Maryland, United States

Pena-Purcell N.,Texas A&M University | Bowen E.,West Virginia University | Zoumenou V.,University of Maryland Extension | Schuster E.R.,University of Missouri | And 3 more authors.
Journal of Extension | Year: 2012

We report results of a Web-based nationwide survey of nutrition and health Extension specialists representing 42 states. Survey items (n = 36) assessed five areas: curriculum review, nutrition and physical activity, professional training, communication, and evaluation. An internal curriculum review was common, but few states shared their criteria or process on-line. The majority of respondents reported discussing physical activity, and over half lead physical activities. Most favored on-line professional development training and a one-stop website for sharing information and resources. Evaluation data were most commonly collected for food safety, healthy eating and physical activity, and food resource management. © by Extension Journal, Inc. Source

Ristvey A.G.,University of Maryland Extension | Solano L.,University of Maryland University College | Wharton K.,University of Maryland University College | Cohan S.M.,University of Maryland University College | Lea-Cox J.D.,University of Maryland University College
Low Impact Development 2010: Redefining Water in the City - Proceedings of the 2010 International Low Impact Development Conference | Year: 2010

Extensive green roof systems are becoming increasingly popular with urban Low Impact Design (LID), having a number of tangible benefits, not the least of which is storm water mitigation, ameliorating urban storm water discharge from impervious surfaces while reducing high-flow periods which cause stream-bed erosion and carry pollutants to local waterways. The most important factor of storm water amelioration is the substrate or media, which are mineral-based manufactured aggregates, blended with specific granulometric distributions based on design intent or regional rainfall patterns, better optimizing water holding capacity while still providing enough air-filled porosity for healthy plant roots. Crumb rubber, a recycled tire product, is a potential green roof substrate amendment, and is currently available in large quantities throughout North America. Crumb rubber offers many potential benefits, including improvements in substrate air-filled porosity while reducing the weight of the green roof substrate for increasing the potential retrofit of older buildings. Three typical green roof substrates were amended with 8-12 sieve-mesh crumb rubber in increments of 0, 6, 12, 18, 24, and 30% by volume, and were analyzed for air-filled porosity and water holding capacity with the North Carolina State University Porometer system. Higher proportions of crumb rubber significantly reduced total porosity and water holding capacity, yet increased air-filled porosity compared to unamended control in one substrate and decreased bulk density in all substrates. This study was developed to determine the effect of crumb rubber amendments on the porosity and bulk density of green roof substrates to balance water holding performance yet, retain a root friendly environment, and increase the potential for green roof retrofit onto buildings with limited structural capacity. © 2010 ASCE. Source

Zoumenou V.M.,University of Maryland Extension | Zoumenou V.M.,University of Maryland Eastern Shore | Magnus M.,Florida International University | Himburg S.,Florida International University | And 4 more authors.
European Journal of Scientific Research | Year: 2010

The objective of this study is to describe and compare the strength of commitment to following the recommended lifestyle (eating and exercise habits) among six Black groups, with type 2 diabetes in Miami, Florida, and Abidjan, Côte d'Ivoire. Four public clinics in Miami and one clinic in Abidjan were used. Approximately 180 Black Americans (African-Americans, Caribbean-Americans, Haitian-Americans) and 180 Black Africans (Akan, Krou, Malinke), aged 20 years and older, were surveyed in a cross sectional design. One-way ANOVA, Chi square statistics, Canonical correlations, and content analysis were computed. The Commitment to Lifestyle Self-Management (CLSM) instrument (Zoumenou et al., 2009) was used to assess participants' strength of commitment to lifestyle self-management. Overall, African American participants showed the most negative attitude towards recommended foods, Caribbean American respondents reported the least perceived negative attitudes and behaviors towards weight control regimen. Black African groups had significantly more strength of commitment to dietary adherence and weight control than Black American groups. There is no dose response between diabetes services and strength of commitment to lifestyle self-management. Black Africans living in Africa reported less access to facilities, less attendance to diabetes classes but higher strength compared to African Americans. Being African living in Africa (r=.99), married (r=.36), following dietary recommendations (r=.52), were significantly correlated to participants' strength of commitment with a canonical correlation of .88. Adherence to diabetes self-management is a multi-factorial phenomenon. Black groups cannot be considered as a homogenous group. Cultural factors and individualized assessment of strength of commitment to lifestyle self-management should be considered before goal setting during counseling. © EuroJournals Publishing, Inc. 2010. Source

Solano L.,University of Delaware | Ristvey A.G.,University of Maryland Extension | Lea-Cox J.D.,University of Maryland University College | Cohan S.M.,University of Maryland University College
Ecological Engineering | Year: 2012

Extensive green roof systems can mitigate urban stormwater by capturing rainfall and reducing runoff volume. Green roof media, often made from heat-expanded shales, slates and clays are fundamental for roof hydraulic dynamics, and for providing optimal plant growth conditions. However, many of these media have a high carbon footprint from processing and occasionally impose load limitations for retrofitting on roofs of older infrastructure. This research studied recycled-tire crumb rubber (CR), as a light-weight material for amending green roof media. Despite its advantages as a recycled product, CR releases zinc (Zn). This heavy metal could be harmful for green roof plants and the overall ecosystem. Zinc released from CR was quantified, and the interactions with the commercial green roof media, rooflite ®, were characterized. In initial leaching assays, it was confirmed that CR leaches Zn in potentially toxic quantities for Sedum, which is perhaps the most important genus utilized in commercial applications in the United States. However, when CR was combined in volumetric proportions of 6%, 18% and 30% with the green roof medium rooflite ® and bathed in water for 16 days, up to 99% of Zn became unavailable compared to a 100% CR control. Crumb rubber was volumetrically combined in 30% proportions with either rooflite ® or glass beads for three months. Analysis of leachates from weekly applications of water showed that the green roof medium could render the Zn unavailable and below USEPA toxicity thresholds. These results suggest that media with high cation exchange capacities can effectively mitigate the Zn released from CR. This application may allow for the reutilization of a waste material as an amendment for extensive green roof media. © 2012 Elsevier B.V. Source

Zhang H.,Virginia Polytechnic Institute and State University | Richardson P.A.,Virginia Polytechnic Institute and State University | Belayneh B.E.,University of Maryland University College | Ristvey A.,University of Maryland Extension | And 4 more authors.
Water (Switzerland) | Year: 2015

Recycling irrigation reservoirs (RIRs) are an emerging aquatic ecosystem of critical importance, for conserving and protecting increasingly scarce water resources. Here, we compare water quality between runoff entrance and middle of four RIRs in nurseries in Virginia (VA) and Maryland (MD). Surface water temperature (T) and oxidation-reduction potential (ORP) were lower in the middle than at the entrance, while the trend was opposite for dissolved oxygen (DO), pH and chlorophyll a (Chla). The magnitude of these differences between the entrance and middle decreased with increasing depth. These differences were magnified by water stratification from April to October. Minimum differences were observed for electrical conductivity (EC), total dissolved solids (TDS) and turbidity (TUR). Cluster analyses were performed on water quality difference data to evaluate whether the differences vary with respect to reservoirs. Two clusters were formed with one consisting primarily of VA reservoirs, and the other consisting mostly of MD reservoirs in both years. Water quality in the middle and at the entrance of RIRs was expected to vary greatly because of runoff inflow. The two-point water quality differences observed here, although statistically significant, are not large enough to cause significant impact on crop health and productivity for most water quality parameters except pH. Additional analysis of outlet data shows that the range and magnitude of water quality difference between the middle and the outlet are comparable to those between the middle and entrance of RIRs. These results indicate that monitoring at a single point is sufficient to obtain reliable water quality estimates for most water quality parameters in RIRs except pH. This is important when considering the cost of labor and equipment necessary for documenting water quality in agricultural production systems. However, additional pH measurements are still necessary to make practical water quality management decisions. © 2015 by the authors; licensee MDPI, Basel, Switzerland. Source

Discover hidden collaborations