Digital Commons Network^™

Use Of Esi-Fticr-Ms To Characterize Dissolved Organic Matter In Headwater Streams Draining Forest-Dominated And Pasture-Dominated Watersheds, Randolph Chambers

Arts & Sciences Articles

Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS) has proven to be a powerful technique revealing complexity and diversity of natural DOM molecules, but its application to DOM analysis in grazing-impacted agricultural systems remains scarce. In the present study, we presented a case study of using ESI-FTICR-MS in analyzing DOM from four headwater streams draining forest- or pasture-dominated watersheds in Virginia, USA. In all samples, most formulas were CHO compounds (71.8–87.9%), with other molecular series (CHOS, CHON, CHONS, and CHOP (N, S)) accounting for only minor fractions. All samples were dominated by molecules falling in the lignin-like region …

2014 Chesapeake Bay Sav Coverage, Sav Data Administrator, Virginia Institute Of Marine Science

Data

Abstract: The 2014 Chesapeake Bay SAV Coverage was mapped from 1:24,000 black and white aerial photography and digital multispectral imagery with a 25cm GSD to assess water quality in the Bay. Each area of SAV was interpreted from the rectified photography and classified into one of four density classes by the percentage of cover. The SAV beds were entered into an SDE GIS fetaure class using the quality control procedures documented below. The dataset contains all SAV areas that were identified from the areas flown. Some areas that are presumed to contain no SAV were not flown. Some small beds, …

Dbx1 Precursor Cells Are A Source Of Inspiratory Xii Premotoneurons., Ann L. Revill, Nicolas C. Vann, Victoria T. Akins, Andrew Kottick, Paul A. Gray, Christopher A. Del Negro, Gregory D. Funk

Arts & Sciences Articles

All behaviors require coordinated activation of motoneurons from central command and premotor networks. The genetic identities of premotoneurons providing behaviorally relevant excitation to any pool of respiratory motoneurons remain unknown. Recently, we established in vitro that Dbx1-derived pre-Bo¨ tzinger complex neurons are critical for rhythm generation and that a subpopulation serves a premotor function (Wang et al., 2014). Here, we further show that a subpopulation of Dbx1-derived intermediate reticular (IRt) neurons are rhythmically active during inspiration and project to the hypoglossal (XII) nucleus that contains motoneurons important for maintaining airway patency. Laser ablation of Dbx1 IRt neurons, 57% of which …

Sexuality And Intimacy Between Couples Facing Terminal Illness, Megan L. Johnson

The William & Mary Educational Review

No abstract provided.

Coherent Approach To Busycon/Busycotypus Fishery Management Along The Us Atlantic Seaboard Proceedings From The 16th International Conference On Shellfish Restoration (Icsr), December 10-13, 2014, Charleston Sc, Robert A. Fisher

Reports

No abstract provided.

Lancaster County, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Kory Angstadt, David Stanhope, Christine Tombleson, Karen Duhring, Alexander D. Renaud, Robert Isdell, Pamela Braff, Benjamin P. Weissman, Carl Hershner

Reports

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. The three tiered shoreline assessment approach divides the shorezone into three regions:

• the immediate riparian zone, evaluated for land use

• the bank, evaluated for height, cover and natural protection

• the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2015 Inventory for Lancaster County was generated using on-screen, digitizing …

City Of Portsmouth, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Kory Angstadt, Karen Duhring, David Weiss, Carl Hershner

Reports

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. The three tiered shoreline assessment approach divides the shorezone into three regions:

1) the immediate riparian zone, evaluated for land use; 2) the bank, evaluated for height, cover and natural protection; and 3) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2015 Inventory for the City of …

Two Nucleon Systems At M(Pi) Similar To 450 Mev From Lattice Qcd, Kostas Orginos, Assumpta Parreño, Martin J. Savage, Silas R. Beane, Et Al.

Arts & Sciences Articles

Nucleon-nucleon systems are studied with lattice quantum chromodynamics at a pion mass of m(pi) similar to 450 MeV in three spatial volumes using n(f) = 2 + 1 flavors of light quarks. At the quark masses employed in this work, the deuteron binding energy is calculated to be B-d = 14.4(-2.6)(+3.2) MeV, while the dineutron is bound by B-nn = 12.5(-5.0)(+3.0) MeV. Over the range of energies that are studied, the S-wave scattering phase shifts calculated in the S-1(0) and S-3(1)-D-3(1) channels are found to be similar to those in nature, and indicate repulsive short-range components of the interactions, consistent …

Letter From The Editor, Davis Clement

The William & Mary Educational Review

No abstract provided.

Administering An Educational Program: Implementing Culturally Responsive Curriculum And Instruction In Elementary Schools To Increase Student Achievement, Marquita Hockaday

The William & Mary Educational Review

The demographics in America’s K-12 classrooms will continue to shift throughout the 21st century as students become more diverse. However, educators remain predominantly White, presenting issues of cultural disequilibrium. Cultural disequilibrium may result in frustration and a breakdown in the classroom, leading to a lack of achievement amongst culturally diverse students. Further, educators and educational leaders often lack the skills to work with diverse populations due to inadequate pre-service programs. Thus, it is critical that educational leaders become aware of and understand various culturally responsive curricula and instructional practices. Elementary school educational leaders can develop and administer effective culturally responsive …

Helping Students Maximize Their Degrees As Competitive Tools: The Value Of Experiential Learning, Cassandra Spencer, April Perry

The William & Mary Educational Review

It is a common misconception among students that following graduation there will be an abundance of job opportunities, and by simply earning a degree, they will be competitive in the job market. Through a review of relevant literature, this article examines college graduate employment statistics and the skills employers desire most in new hires. Using this literature as a contextual lens, the benefits of experiential learning as a way for college students to maximize their degree is discussed. The research shows that these types of learning opportunities are essential in helping students grow, learn, realize their potential, explore different career …

The Necessary Shift In Writing Instruction: Implementing Authentic Tasks While Meeting Learning Standards, Miranda Sigmon

The William & Mary Educational Review

This article focuses on writing instruction and the necessity for this instruction to be modified regarding the use of literacy in everyday life. Reviewing literature about standards, motivation, and writing instruction makes the implementation of authentic writing tasks evident as a necessity for increasing student motivation and allowing for students’ individuality. Each lesson taught in the classroom, regardless of expected outcomes, should foster student engagement, curiosity, and eagerness to learn. With respect to writing instruction, teachers must approach learning with student individuality in mind and create writing experiences that are engaging, allow for creativity, and have meaning for students so …

Biotelemetry Of Cownose Rays In Chesapeake Bay: Habitat Use And Ray Movement, Robert A. Fisher

Reports

No abstract provided.

Piecewisesem: Piecewise Structural Equation Modelling In R For Ecology, Evolution, And Systematics, Jonathan S. Lefcheck

VIMS Articles

Summary

1. Ecologists and evolutionary biologists rely on an increasingly sophisticated set of statistical tools to describe complex natural systems. One such tool that has gained significant traction in the biological sciences is structural equation models (SEM), a form of path analysis that resolves complex multivariate relationships among a suite of interrelated variables.

2. Evaluation of SEMs has historically relied on covariances among variables, rather than the values of the data points themselves. While this approach permits a wide variety of model forms, it limits the incorporation of detailed specifications. Recent developments have allowed for the simultaneous implementation of non‐normal distributions, random …

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Climate Change As Migration Driver From Rural And Urban Mexico, Raphael J. Nawrotzki, Lori M. Hunter, Daniel Runfola, Fernando Riosmena

Arts & Sciences Articles

Studies investigating migration as a response to climate variability have largely focused on rural locations to the exclusion of urban areas. This lack of urban focus is unfortunate given the sheer numbers of urban residents and continuing high levels of urbanization. To begin filling this empirical gap, this study investigates climate change impacts on US-bound migration from rural and urban Mexico, 1986–1999. We employ geostatistical interpolation methods to construct two climate change indices, capturing warm and wet spell duration, based on daily temperature and precipitation readings for 214 weather stations across Mexico. In combination with detailed migration histories obtained from …

Street-Level Predictive Modeling Of Nuisance Flooding Verified Via Crowdsourced App Data In Norfolk, Va, J. D. Loftis, H. V. Wang, D R. Forrest

Presentations

No abstract provided.

Particle Transport In Low-Collisionality H-Mode Plasmas On Diii-D, Saskia Mordijck, X. Wang, E. J. Doyle, T. L. Rhodes, Et Al.

Arts & Sciences Articles

In this paper we show that changing from an ion temperature gradient (ITG) to a trapped electron mode (TEM) dominant turbulence regime (based on linear gyrokinetic simulations) results experimentally in a strong density pump-out (defined as a reduction in line-averaged density) in low collisionality, low power H-mode plasmas. We vary the turbulence drive by changing the heating from predominantly ion heated using neutral beam injection to electron heated using electron cyclotron heating, which changes the T-e/T-i ratio and the temperature gradients. Perturbed gas puff experiments show an increase in transport outside rho = 0.6, through a strong increase in the …

Gifted Children And Peer Relationships, Jennifer Riedl Cross

School of Education Book Chapters

The Social and Emotional Development of Gifted Children remains the only book that provides a comprehensive summary of the empirical research on the social and emotional development of gifted children by leading authorities in the field. It includes several features that make it the leading text on what we know about the social and emotional development of gifted children. For example, it summarizes the most significant findings from the empirical research on the topic. It also includes noteworthy variations that have been observed across cultural groups or global contexts. Each chapter also provides a short description of the practical applications …

Tenet Two: Commit To Student Learning As A Primary Focus, James P. Barber

School of Education Book Chapters

No abstract provided.

Social Control Of Reproduction And Breeding Monopolization In The Eusocial Snapping Shrimp Synalpheus Elizabethae, Stc Chak, Dr Rubenstein, Je Duffy

VIMS Articles

Understanding why individuals within altruistic societies forgo reproduction to raise others' offspring has fascinated scientists since Darwin. Although worker polymorphism is thought to have evolved only in sterile workers, worker subcastes appear to be common among social invertebrates and vertebrates. We asked whether sterility accompanies eusociality and morphological differentiation in snapping shrimps (Synalpheus)-the only known marine eusocial group. We show that workers in Synalpheus elizabethae are reproductively totipotent and that female-but not male-gonadal development and mating are mediated by the presence of a queen, apparently without physical aggression. In queenless experimental colonies, a single immature female worker typically became ovigerous, …

Molybdenum Complexes Of Chiral C2-Symmetric Picchxn-Type Ligands: Synthesis, Characterization, And Structural Studies, Rachel R. Bennov, David A. Berko, Samantha A. Burgess, John L. Dimeglio, Et Al., Robert D. Pike

Arts & Sciences Articles

A series of molybdenum complexes based on chiral C2-symmetric picchxn-type ligands (N4 ligands, defined as trans-N,N′-bis(heterocycl-2-ylmethyl)-1,2-diaminocyclohexanes) has been synthesized and characterized. Reported and novel picchxn-type ligands form (κ3-N4)Mo(CO)3, [(κ4-N4)Mo(NO)(CO)]PF6, and [(κ4-N4)Mo(NO)X]PF6 (X = Br, I) compounds. Multiple tridentate (κ3) and tetradentate (κ4) ligand configurations were observed, and the favored κ4 configuration was found to vary with N4 heterocycle identity. Heterocycle variation allowed for directed modification of the molybdenum electronic characteristics, but none of the studied {(κ4-N4)Mo(NO)}+ fragments was found to be a suitable …

The Influence Of Internal Migration On Exposure To Extreme Weather Events In Mexico, Daniel Runfola, Patricia Romero-Lankao, Leiwen Jiang, Et Al.

Arts & Sciences Articles

Between 2005 and 2010, 6.3 million migrants (approximately 6% of the population) moved domestically within Mexico. These shifts have potential implications for exposure to natural disasters. To examine this relationship, we use census microdata in conjunction with information on natural disaster events. The populations exposed to extreme weather events are first calculated based on observed disasters and demographic change between 2005 and 2010. This is compared to a hypothetical scenario with no migration between 2005 and 2010. The results presented in this research note demonstrate that while migration has slightly decreased overall exposure within Mexico, this influence is highly localized …

Squidpops: A Simple Tool To Crowdsource A Global Map Of Marine Predation Intensity, J. Emmett Duffy, Shelby L. Zeigler, Justin E. Campbell, Paige M. Bippus, Jonathan S. Lefcheck

VIMS Articles

We present a simple, standardized assay, the squidpop, for measuring the relative feeding intensity of generalist predators in aquatic systems. The assay consists of a 1.3-cm diameter disk of dried squid mantle tethered to a rod, which is either inserted in the sediment in soft-bottom habitats or secured to existing structure. Each replicate squidpop is scored as present or absent after 1 and 24 hours, and the data for analysis are proportions of replicate units consumed at each time. Tests in several habitats of the temperate southeastern USA (Virginia and North Carolina) and tropical Central America (Belize) confirmed the assay’s …

Writing At The Williamsburg Bray School?, Terry L. Meyers

Arts & Sciences Articles

"I’ve become interested recently in whether writing was taught to the pupils in the Williamsburg Bray School. I had assumed all along that it was, and that the discovery of 40 some slate pencils at the Bray School Dig was confirmation of that.

I’d not been alone in my assumption about the teaching of writing, for the great majority of those interested in the Bray School have affirmed that the curriculum included writing..."

Stafford County Shoreline Management Plan, C. Scott Hardaway Jr., Donna A. Milligan, Christine A. Wilcox, Marcia Berman, Tamia Rudnicky, Karinna Nunez, Sharon Kileen

Reports

With approximately 85 percent of the Chesapeake Bay shoreline privately owned, a critical need exists to increase awareness of erosion potential and the choices available for shore stabilization that maintains ecosystem services at the land-water interface. The National Academy of Science published a report that spotlights the need to develop a shoreline management framework (NRC, 2007). It suggests that improving awareness of the choices available for erosion control, considering cumulative consequences of erosion mitigation approaches, and improving shoreline management planning are key elements to minimizing adverse environmental impacts associated with mitigating shore erosion. Actions taken by waterfront property owners to …

Estuarine Sediment Dynamics, C. T. Friedrichs

Presentations

No abstract provided.

Modeling Estuarine Response To Load Reductions In A Warmer Climate: York River Estuary, Virginia, Usa, Samuel J. Lake, Mark Brush

VIMS Articles

The impact of climate warming on shallow tributary estuaries will be influenced by the complex cycling of nutrients and organic matter, diversity of primary producers, and enhanced benthic-pelagic coupling typical of these systems, along with advection of nutrients, organic matter, and hypoxic water from adjacent systems. This study utilized a parsimonious, reduced-complexity model that combines mechanistic equations with robust, data-driven, empirical formulations to predict how phytoplankton net primary production (NPP), net ecosystem metabolism (NEM), and hypoxia will change under a range of warmer conditions in the York River Estuary, VA, USA, a sub-estuary of Chesapeake Bay. Modeled NPP peaked earlier …

Volume 6, The James Blair Historical Review

James Blair Historical Review

No abstract provided.

The Effector Domain Of Marcks Is A Nuclear Localization Signal That Regulates Cellular Pip2 Levels And Nuclear Pip2 Localization, Timothy D. Rohrbach, Nishi Shah, William P. Jackson, Evin V. Feeney, Samantha Scanlon, Robert Gish, Ryan Kohdadadi, Stephen O. Hyde, Patricia H. Hicks, Joshua C. Anderson, John S. Jarboe, Christopher D. Willey

Richard Bland Faculty Works

Translocation to the nucleus of diacylglycerol kinase (DGK)– ζ is dependent on a sequence homologous to the effector domain of Myristoylated Alanine Rich C-Kinase Substrate (MARCKS). These data would suggest that MARCKS could also localize to the nucleus. A single report demonstrated immunofluorescence staining of MARCKS in the nucleus; however, further experimental evidence confirming the specific domain responsible for this localization has not been reported. Here, we report that MARCKS is present in the nucleus in GBM cell lines. We then over-expressed wild-type MARCKS (WT) and MARCKS with the effector domain deleted (ΔED), both tagged with V5-epitope in a GBM …

Richard Iii: A Ruler And His Reputation, David Horspool (Book Review), Kathleen Mccallister

W&M Libraries Publications

No abstract provided.