8,309 Works

How Engaged Are Morgan State University Students? A Focus On Service Learning

Mercy Wangu Ndege
One of the key components of Morgan State University's mission is to promote an active relationship between its University and Baltimore city communities by integrating student skills with the community's needs. As such, the University has established both formal curricular and informal organizational structures through which to implement community engagement activities. According to Denton (1997), service learning as part of formal academic course offerings evolved from the work of John Dewey who provided the theoretical...

Study of two Russian composers who had conflicting audience acceptance; Nicolai Medtner and Sergei Rachmaninoff

Lilly Ahn
Musical studies on selected songs by Medtner and Rachmaninoff

THE INCIDENCE OF TRADE WARS: EVIDENCE FROM THE US SOLAR INDUSTRY

Wenjun Wang
Trade wars between countries in the renewable energy sector have proliferated in recent years, potentially hindering the growth of the industry. This dissertation investigates the welfare effect of anti-dumping policies initiated by the US government against Chinese manufacturers. It focuses on the US solar industry, which has grown more than thirtyfold over the past ten years. Chapter 1 describes the policy background leading to the trade war, together with institutional details of the industry. Furthermore,...

Dark regeneration of rhodopsin in crayfish photoreceptors

Thomas W. Cronin & Goldsmith, Timothy H .
The eyes of crayfish were exposed to lights of known spectral composition, and the course of regeneration was followed in the dark by measuring the content of rhodopsin and metarhodopsin in single rhabdoms isolated at various times after the adaptation, using an assay that is based on the fluorescence of metarhodopsin. Complete recovery requires several days in the dark after intense adaptation to orange light, but requires less than 2 d after blue light exposure....

Control of diel vertical migration: Photoresponses of a larval crustacean

Richard B. Forward, Thomas W. Cronin & Donald E. Stearns
The lower threshold for phototaxis of dark‐adapted larvae of the crab Rhithropanopeus harrisii is 10⁻⁷ W·m⁻² at 500‐nm light. This threshold does not change throughout development. In the Newport River estuary (North Carolina), larvae show a pattern of nocturnal vertical migration in which the distribution of later‐stage zoeal larvae centers on the 10⁻⁷ W·m⁻² isolume during the day. The behavioral responses underlying this relationship include a negative geotaxis in darkness which changes to a sinking...

Photosensitivity spectrum of crayfish rhodopsin measured using fluorescence of metarhodopsin

T. W. Cronin & T. H. Goldsmith
Discrepancies exist among spectral measurements of sensitivity of crayfish photoreceptors, their absorption in situ, and the number and absorption spectra of crayfish photopigments that are extracted by digitonin solutions. We have determined the photosensitivity spectrum of crayfish rhodopsin in isolated rhabdoms using long wavelength fluorescence emission from crayfish metarhodopsin as an intrinsic probe. There is no measurable metarhodopsin in the dark-adapted receptor, so changes in the emission level are directly proportional to metarhodopsin concentration. We...

Fluorescence of crayfish metarhodopsin studied in single rhabdoms

T.W. Cronin & T.H. Goldsmith
Isolated photoreceptor organelles (rhabdoms) from eyes of crayfish (Procambarus. Orconectes) were examined on a microscope system designed for quantitative measurements of fluorescent. Although fully dark-adapted rhabdoms are nonfluorescent or very weakly fluorescent, an increasing emission appears on exposure to light. Over the 30-fold range of intensities studied, the rate of the appearance of this fluorescence is identical to the rate of formation of metarhodopsin from rhodopsin. Furthermore, the excitation spectra for the observed emission are...

SHORT TERM TRAVEL BEHAVIOR PREDICTION THROUGH GPS AND LAND USE DATA

Cory Krause
The short-term destination prediction problem consists of capturing vehicle Global Positioning System (GPS) traces and learning from historic locations and trajectories to predict a vehicle’s destination. Drivers have predictable trip destinations that can be estimated through probabilistic modeling of past trips. This dissertation has three main hypotheses; 1) Employing a tiered Markov model structure will permit a shorter learning period while achieving similar accuracy results, 2) The addition of derived trip purpose information will increase...

Re-Examining The Mortality Function Of Carriers In The Transition To A Deregulated Trucking Industry: Are There Organizational Properties Of Carriers That Affect Their Mortality Function In The Transitional Period?

Abisola Abolude
The deregulation of the trucking industry in 1980 resulted in over-entry of carriers, which in turn spurred intense competition and ultimately led to mortality of many trucking carriers. This thesis studies the factors that led to carriers' exit from the industry, and aims to provide evidence that groups of carriers with varying operational characteristics could be affected differently by the predicting factors of exit, and as such may not share a single exit function as...

Understanding and Enhancing the U.S. Department of Housing and Urban Development’s ZIP Code Crosswalk Files

Ron Wilson & Alexander Din
ZIP Codes are commonly used for mapping, spatial analyses, creating tables, or other reporting products. Used for these tasks, the results from using these geographies often are distorted because of adverse statistical properties inherent with ZIP Codes. Summarizing ZIP Code data to other large geographies (for example, county, Core Based Statistical Area, state) associates them with these other geographies to create aggregate counts so that metropolitan or county rankings can be reported. This process requires...

INTEGRATED VARIABLE SPEED LIMIT AND RAMP METERING CONTROL FOR MANAGING RECURRENT FREEWAY CONGESTION

Yang Lu
Recurrent congestion due to highway bottlenecks is one major factor contributing to daily commuting delays in most traffic corridors. The resulting traffic queues often start from the bottleneck, and then spill back to further upstream segments to block their on-ramps and off-ramps. Consequently, the entire corridor -- freeways and their connected local arterials -- often suffers from severe gridlocks. To address such a critical issue, this research aims to develop an integrated control system, using...

Germ Cells and Epigenetics

Cynthia R. Wagner
All multicellular organisms begin life as a single cell, the zygote, created by the union of two germ cells, an oocyte and a sperm. Although scientists have understood for decades that the quantity of DNA an individual inherits from each parent is equivalent, a 1984 discovery by McGrath and Solter revealed that these genes are used differently depending on whether the genes are inherited from the mother or the father (McGrath & Solter 1984). These...

EFFECTS OF CARDIOVASCULAR DISEASE AND PHYSICAL INACTIVITY ON THE PARACRINE FUNCTION OF CIRCULATING ANGIOGENIC CELLS

Rian Quinn Landers-Ramos
Cardiovascular disease (CVD) is the leading cause of death in developed countries. Traditional cardiovascular risk factors account for only a fraction of events related to CVDs, emphasizing the need for investigations into more novel risk factors. Circulating angiogenic cells (CACs) are involved in the repair and maintenance of the vascular endothelium and function mainly through paracrine mechanisms. The studies presented in this dissertation provide new insight into differences in the paracrine actions of CACs as...

Rilke's Russian Encounter and the Transformative Impact on the Poet

Victoria Finney
Russian culture had a pivotal role in the development of Rainer Maria Rilke's poetic perception and evolution. As late as 1922, Rilke emphatically claimed that Russian culture made him into what he is. Decades earlier, during his visits to Russia in 1899 and 1900, Rilke encountered many Russians from different walks of life: writers, artists, intellectuals and ordinary folk. Having immersed himself in the study of Russian language, literature, visual arts and religious ritual, Rilke...

An Exploration Of Chronic Absenteeism From The Perspective Of Students In An Urban Public High School

Sheila Lucas
School attendance is a critical issue facing schools today. Many studies have been conducted nationally and internationally concerning poor school attendance. Findings from these studies have revealed that poor school attendance not only hinders academic achievement but also contributes to a poorly educated society. The purpose of this qualitative study was to examine chronic absenteeism from the student perspective. Nine participants who were 18 years old, from urban communities in Washington, D.C., and attend an...

Medicaid Long-Term Services and Supports in Maryland: FY 2012 to FY 2016 Volume 2 The Brain Injury Waiver

The Hilltop Institute
This chart book is the second in a series that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. It provides information about Maryland Medicaid participants who received services through the Brain Injury Waiver in fiscal years 2012 through 2016. The Brain Injury Waiver provides services to individuals aged 22 through 64 years with a brain injury diagnosis who require a specialty hospital or nursing facility level of care.

Medicaid Long-Term Services and Supports in Maryland: FY 2012 to FY 2016 Volume 4 The Model Waiver

The Hilltop Institute
This chart book is the fourth in a series that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. It summarizes demographic, service utilization, and expenditure data for Model Waiver participants for fiscal years 2012 through 2016. The Model Waiver allows individuals with medically complex needs and a chronic hospital or nursing facility level of care to received needed services in their homes.

Medicaid Long-Term Services and Supports in Maryland: FY 2012 to FY 2016 Volume 3 Medical Day Care Waiver

The Hilltop Institute
This chart book is the third in a series that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. It provides information about Maryland Medicaid participants who received services through the Medical Day Care Waiver in fiscal years 2012 through 2016. The 1915(c) Medical Day Care Waiver provides medical day care services to persons aged 16 and over who are eligible for Medicaid and who meet a nursing facility level of...

Self-Assembly of Precision Polyolefin Block Copolymers and Sugar-Polyolefin Conjugates

Samantha Raina Nowak
Self-assembling materials have become ubiquitous in modern society. Thus, a great challenge exists in developing nonpolar building blocks for self-assembling materials in a simple, efficient, and scalable manner. It is also important to find new ways in which to utilize such building blocks in a versatile manner. In this work, precision polyolefins and end-group functionalized poly(-olefinates) (x-PAOs) were successfully used as simple, easily accessible nonpolar building blocks for the development of new nanostructured materials. Specifically,...

The Impact Of Single-Sex Education On African American Student Achievement: An Analysis Of An Urban School's Reform Efforts

Marquis S. Dwarte
The academic underperformance of African American males is nothing less than an epidemic that continues to limit their academic, career, and life opportunities. The complexities of meeting the academic needs of African American males are compounded for large, urban school districts with limited resources. Consequently, many urban school districts have implemented various non-traditional school programs in an effort to better address the schooling needs of African Americans. In 2006, federal legislation passed allowing public schools...

Medicaid Long-Term Services and Supports in Maryland: FY 2008 to FY 2011 Volume 3 The Traumatic Brain Injury Waiver

The Hilltop Institute
The Maryland Long-Term Services and Supports Chart Book, Volume 3, The Traumatic Brain Injury Waiver is the last in a series of three that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. Volume 1 explores service utilization and expenditures for Maryland Medicaid’s Living at Home Waiver, Older Adults Waiver, and Medical Day Care Waiver, as well as Maryland State Plan personal care services and Medicaid nursing facility utilization and expenditures....

Medicaid Long-Term Services and Supports in Maryland: FY 2008 to FY 2011 Volume 2 The Autism Waiver

The Hilltop Institute
The Maryland Long-Term Services and Supports Chart Book, Volume 2, The Autism Waiver is the second chart book in a series of two that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. The first chart book in the series explores service utilization and expenditures for Maryland Medicaid’s Living at Home Waiver, Older Adults Waiver, and Medical Day Care Waiver, as well as Maryland State Plan personal care services and Medicaid...

Medicaid Long‐Term Services Services and Supports in Maryland: FY 2011 to FY 2014 Volume 2 The Brain Injury Waiver

The Hilltop Institute
The Medicaid Long-Term Services and Supports in Maryland Chart Book, Volume 2, The Brain Injury Waiver is the second in a series of three that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. Volume 1 explores service utilization and expenditures for Maryland Medicaid’s Autism Waiver. Volume 3 provides information on the states’ Medicaid Model Waiver.

Medicaid Long‐Term Services Services and Supports in Maryland: FY 2011 to FY 2014 Volume 1 The Autism Waiver

The Hilltop Institute
The Medicaid Long-Term Services and Supports in Maryland Chart Book, Volume 1, The Autism Waiver is the first in a series of three that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. Volume 2 explores service utilization and expenditures for Maryland Medicaid’s Brain Injury Waiver. Volume 3 provides information on the state’s Medicaid Model Waiver

Medicaid Long-Term Services and Supports in Maryland: FY 2010 to FY 2013 Volume 2 The Autism Waiver

The Hilltop Institute
The Maryland Long-Term Services and Supports Chart Book, Volume 2, The Autism Waiver is the second chart book in a series of two that explores service utilization and expenditures for Medicaid-funded long-term services and supports in Maryland. Volume 1 in this series explores service utilization and expenditures for Maryland Medicaid’s Living at Home Waiver, Waiver for Adults, and Medical Day Care Waiver, as well as Maryland State Plan personal care services and Medicaid nursing facility...

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