Giles III N.,Prince Georges Community College
American Journal of Drug and Alcohol Abuse | Year: 2010
Background: Among adolescents, peers are an important source of drug procurement. However, little is known about factors associated with youths' involvement in drug trade. Objectives: The aim of the study is to identify substance use behaviors and contextual factors related to drug dealing among Black and White adolescents. Methods: The sample consisted of 13,706 White and Black youths who completed the National Survey on Drug Use and Health. Separate backward logistic regression was used to identify substance use behaviors and contextual factors associated with drug dealing among Black and White youths. Results: Among White youths, drug dealing was associated with use of marijuana, hallucinogens, cocaine, prescription drug misuse, availability of cocaine, and socioeconomic status (SES). Among Black youths, marijuana use and availability of crack and marijuana were associated with drug dealing. Conclusions and Scientific Significance: For White youths, substance use seems to be more relevant to drug dealing. Consequently, preventing and treating substance abuse may reduce involvement in the illegal distribution of drugs among White youths. More research is needed to identify risk and protective factors for drug dealing among Black adolescents. Copyright © 2010 Informa Healthcare USA, Inc.
Silverman S.E.,Prince Georges Community College
Pennsylvania Geographer | Year: 2010
Topical geography employs a multiplicity of methods in the depiction of both natural and cultural landscapes. One technique is to investigate the transformation of human attributes of a landscape as it evolves over a prolong period of time. A geographic synthesis emerges when attributes of economics, sociology and political ideology are united to illuminate cultural persistence, as well as transformation, as amplified by what can be observable in the landscape. Maryland's Catoctin Valley can be considered a subregion within Appalachia. In early 18th century it was part of the Trans-Appalachian Frontier as English and German settlers progressed towards the Shenandoah and Ohio Valleys. The valley reflects a spatial transformation brought on by turnpikes and a great canal that was, subsequently, replaced by both steam and electric railroads. Now the suburban frontier of the Washington's metropolis is intruding consequent to interstate construction, but this intrusion has not compromised historical vestiges of America's past three hundred years as apparent in the Valley's present landscape. Agrarianism, industrialization and suburban development, in the Catoctin Valley, reflect well the study of landscape evolution in both spatial and temporal contexts.
Sinex S.A.,Prince Georges Community College |
Halpern J.B.,Howard University
Materials Research Society Symposium Proceedings | Year: 2010
Many materials science concepts can be developed into animated, interactive spreadsheets to create engaging discovery learning tools. These Excel spreadsheets do not require programming expertise. Learning how to create and use these didactically useful spreadsheets is simple and new examples can be quickly created by instructors. © 2010 Materials Research Society.
Sinex S.A.,Prince Georges Community College |
Halpern J.B.,Howard University
Materials Research Society Symposium Proceedings | Year: 2011
We describe how students explore materials science concepts using animated interactive spreadsheets. An engaging pedagogy is created in the classroom using spreadsheets in a way that initially camouflages mathematical complexity, which can later be revealed and taught. Use of off-the-shelf spreadsheet software, including freeware makes these spreadsheets universally available. © 2011 Materials Research Society.
Sinex S.A.,Prince Georges Community College |
Chambers T.L.,Prince Georges Community College
Journal of Chemical Education | Year: 2013
Online collaboration is a vital 21st-century technology skill. So how can online collaboration be incorporated into general chemistry? We are using Google Drive spreadsheets and forms to develop online collaboration skills in students. The forms capability allows easy collection of data for class comparison and student feedback. The information collected in a spreadsheet can be projected for class discussion, or can easily be downloaded and analyzed in Excel. This is an effective way to gather class statistics on experimental data. We have started to use the Google chat feature to promote discussion in the laboratory of class data, such as looking for uniformity in data or analyzing errors across groups. This is done by posting a link to the form to enter data for student groups and then the link to the spreadsheet of data (which only instructors can edit) and having students open it in the lab. With multiple openings the chat feature is enabled. Any discussion is anonymous unless students or lab groups identify themselves (students are not signed into Google Drive). These mock online collaborations are a valuable start and demonstrate the ease and power of the technology. Collaborative group projects or reports are a logical next step, which would require students to have a Google account. © 2013 The American Chemical Society and Division of Chemical Education, Inc.
Juarrero A.,Georgetown University |
Juarrero A.,University of Miami |
Juarrero A.,Prince Georges Community College
Progress in Biophysics and Molecular Biology | Year: 2015
The role of context-sensitive constraints - first as enablers of complexification and subsequently as regulators that maintain the integrity of self-organized, coherent wholes - has only recently begun to be examined. Conceptualizing such organizational constraints in terms of the operations of far from equilibrium, nonlinear dynamic processes rekindles old metaphysical discussions concerning primary and secondary relations, emergence, causality, and the logic of explanation. In particular, far-from-equilibrium processes allow us to rethink how parts-to-whole and whole-to-parts - so-called "mereological"- relationships are constituted. A renewed understanding of recursive feedback and the role context-dependence plays in generating the boundary conditions and the internal organization of complex adaptive systems in turn allows us to redescribe formal and final cause in such a way as to provide a meaningful sense of heretofore seemingly intractable philosophical problems such as autonomy, self-determination, and agency. © 2015 .
Holmes J.,Johns Hopkins University |
Holmes J.,Howard University |
Holmes J.,Prince Georges Community College |
Johnson K.,Howard University |
And 3 more authors.
Applied Organometallic Chemistry | Year: 2012
ZnO is a high-mobility electron conductor being considered for high-throughput electronics in flexible and transparent formats. We demonstrated the Zn β-ketoiminate system, based on acetylacetimine with N-propyl, isopropyl, and butyl groups, as a vehicle for preparing ZnO thin films for electronic applications. Surface carbon was a primary impurity, and the precursors studied afforded films with the lowest surface carbon contamination at deposition temperatures near 400°C. Thermal annealing of the films reduced the surface carbon content and afforded semiconducting materials. Annealing also gave larger-grained, better connected films. Thinner films were associated with semiconducting as opposed to ohmic behavior; such films will be adaptable for transparent logic circuits. Copyright © 2012 John Wiley & Sons, Ltd.
Agency: NSF | Branch: Standard Grant | Program: | Phase: FED CYBER SERV: SCHLAR FOR SER | Award Amount: 4.80M | Year: 2016
Keeping computers and information systems secure is a major challenge. Business, industry, and government need well-prepared technicians who can prevent, detect, and investigate cybersecurity breaches, and the growth of cyber-threats has created a need for many more workers who have appropriate, specific knowledge and skills. As an Advanced Technological Education (ATE) center, CyberWatch has been addressing this workforce need for over a decade. In 2005, it was launched as an ATE regional center, with a focus on colleges and employers in the Washington-Baltimore region; and in 2012, it evolved into an ATE national center. The National CyberWatch Center (NCC) has achieved major national impact in cybersecurity education by establishing and validating education and training standards; creating a new annual conference focusing on cybersecurity education at the community college level; validating cybersecurity skills using performance-based assessments; and building new cybersecurity curricula tied to job roles and industry certifications.
In its next phase, the center will expand and enhance its leadership role by developing and promoting (1) programs and services designed to attract diverse populations into cybersecurity education and careers; (2) skills-based curricula; (3) collaborations among industry, government, and academia; (4) education, training, and assessment standards; and (5) other resources that increase the number of faculty members and colleges capable of offering high-quality courses and curricula in cybersecurity across the nation. One new focus will be to study and support students transitions from two-year to four-year institutions in cybersecurity in order to increase the number of community college students who enroll in and complete CyberCorps: Scholarship for Service (SFS) programs.
Agency: NSF | Branch: Continuing grant | Program: | Phase: | Award Amount: 5.67M | Year: 2012
CyberWatch has been funded as an Advanced Technological Education (ATE) Regional Center of Excellence since 2005 (NSF Award Nos. 0501828 and 0902747) and has expanded its membership to 94 colleges in 29 states. With this award, the center transitions to an even broader scope as an ATE National Center of Excellence.
The mission of CyberWatch is to advance cybersecurity education by leading collaborative efforts to strengthen the national cybersecurity workforce. The center is building a culture of collaboration among colleges and universities to:
* promote the growth of cybersecurity education programs nationally, especially in community colleges;
* build program and faculty capacity by sharing replicable models of excellence;
* promote the cybersecurity profession through a national dissemination program;
* strengthen student capacity and expand pathways to cybersecurity careers; and
* support research on cybersecurity education.
By promoting models of excellence, CyberWatch is expanding high-quality cybersecurity programs at community colleges around the nation. The center is mentoring colleges to achieve the Center of Academic Excellence in Information Assurance Education - 2 Year (CAE2Y) designation; increasing students awareness of cybersecurity careers and their participation in cybersecurity competitions at the K-12 and college levels; growing the number of faculty able to teach cybersecurity topics; assisting with curriculum development at all levels; expanding the knowledge base of what works (and what does not) in cybersecurity education at all levels; and continuing effective dissemination mechanisms, including the centers Web sites, newsletters, reports, conference presentations, and workshops and institutes, all of which advertise the centers services to a broad community.
As a national center, CyberWatch is leading the effort to bring cybersecurity education at community colleges to the forefront of the national dialogue, thereby helping employers across the nation to meet a critical workforce need.
PubMed | Prince Georges Community College and University of Maryland University College
Type: | Journal: Colloids and surfaces. B, Biointerfaces | Year: 2015
In this paper we provide numerical results for the electrostatic potential profile of a soft charged particle with a charged core and pH-dependent charge density. The present study serves as a useful platform for better quantification of the electrostatic potential profile of the MS2 bacteriophage virus. In this context, this work improves the analysis of a similar recent study [Phan et al., J. Chem. Phys. 139 (2013) 244908] in two aspects. First, as compared to the previous study, we provide numerical rather than analytical results for the electrostatic potential profile. This is important because the analytical treatment forbids the investigation of cases with intermediate to large charge density, relative to the bulk charge density of the electrolyte, of the viral surface. Second, the consideration of pH-dependent charge density in the electrostatic potential profile is a more credible representation of the electrostatics of the virus, which is known to demonstrate pH-dependent variation in the electrophoretic mobility. In fact, we establish that the various predictions on the electrostatic potential profile made in the previous study are substantially modified when the effect of pH is considered, and the result must now be described in terms of the difference pH-pKa, where Ka refers to the ionization constant of the acid that produces the PEL ions.