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Articles 301 - 327 of 327
Full-Text Articles in Entire DC Network
Conservation Laws, Symmetry Breaking And Control Of The Heat Current, Guilio Casati
Conservation Laws, Symmetry Breaking And Control Of The Heat Current, Guilio Casati
2015 Workshop on Infrared Radiation, Thermoelectricity and Chaos
Conservation Laws, Symmetry Breaking and Control of the Heat Current
Dr. Giulio Casati
Insubria University, Center for Nonlinear and Complex Systems, Department of Physics and Mathematics
The understanding of the underlying dynamical mechanisms which determines the macroscopic laws of heat conduction is a long standing task of non-equilibrium statistical mechanics. A better understanding of such mechanism may also lead to potentially interesting applications based on the possibility to control the heat flow. Indeed, a model of thermal rectifier has been recently proposed in which heat can flow preferentially in one direction. The proposed rectifying mechanism is of very general nature …
The Effect Of Religious Opposition On The Mexican-American War (1846-1848), April L. Pickens
The Effect Of Religious Opposition On The Mexican-American War (1846-1848), April L. Pickens
MAD-RUSH Undergraduate Research Conference
The Effect of Religious Opposition on the Mexican-American War, 1846-1848
By April Pickens, History Major
James Madison University
The Mexican-American War began in dubious circumstances, and some Americans disagreed with “Polk’s War” from the beginning. But it was the united efforts of three Protestant denominations—the Congregationalists, the Unitarians, and the Quakers—that finally turned a large segment of the populace against the war. They were able to do this with their multiplying publications, which wielded significant influence in the religiously aware society that existed in America after the Second Great Awakening. When sufficient numbers of ordinary citizens and politicians began voicing …
A Movement On The Verge: The Spark Of Stonewall, Tiffany Renee Nelson
A Movement On The Verge: The Spark Of Stonewall, Tiffany Renee Nelson
MAD-RUSH Undergraduate Research Conference
The presentation is concentrated on the Stonewall Riots and the movement that was furthered by the riots. A narrative of the riots is given as well as a description of the formation of the modern gay and lesbian liberation movement in the United States. Focused in the 1960’s-1980’s time period, an overview of the formation of organizations devoted to the LGBT community and gay rights is presented, in addition to marches that took place to raise awareness. Briefly mentioned are the outbreak of HIV/AIDS in the gay community and how the outbreak contributed to growing gay pride. The essay attempts …
The American Allies: The Impact Of The Oneida Involvement In The American Revolution, Ashlen M. Clark
The American Allies: The Impact Of The Oneida Involvement In The American Revolution, Ashlen M. Clark
MAD-RUSH Undergraduate Research Conference
The American Revolution extended its grasp far past the white men who started it, forcing Natives across the colonies to become involved. Soon after the beginning of the Revolution the Iroquois Six Nations of New York were drawn into the conflict and forced to choose between the Americans, the British, or attempts at neutrality. After the war the Iroquois Six Nations emerged divided, broken, and severely less powerful than when they entered the strife. This paper examines the impact of the American Revolution on this Iroquoian division, specifically focusing on the Oneida Indian Tribe and the effects of their alliance …
Politics Of Identity And Oppression In Rhys’S Voyage In The Dark, Ellen Michelle Stringer
Politics Of Identity And Oppression In Rhys’S Voyage In The Dark, Ellen Michelle Stringer
MAD-RUSH Undergraduate Research Conference
In this essay, “Politics of Identity and Oppression in Rhys’s Voyage in the Dark” I aim to explore the ways in which identity and the idea of the constructed ‘self’ are both created and continuously transformed by one’s experiences and memories. I argue that the protagonist of Rhys’s novel’s identity is ultimately shaped by her racialized experiences of growing up in the West Indies. In my discussion I analyze the color metaphors Rhys utilizes and the impact they have upon readers’ unconscious perceptions about race, ultimately aiming to deconstruct the commonly assumed/utilized dichotomy between white/black. I use these notions of …
Jordan: A Negative Case In A Tumultuous Region, Ann Marie Margaret Hager
Jordan: A Negative Case In A Tumultuous Region, Ann Marie Margaret Hager
MAD-RUSH Undergraduate Research Conference
International media brings attention to the worst conflicts worldwide. When ISIS beheads journalists, like Foley and Sotloff (Vourvoulias, 2014) journalists around the globe turn their editorial dockets to these heinous actions. Yet, it is easy to pay attention to conflict when it becomes severe, i.e., escalates to the level of war. It’s no wonder that the Arab/Israeli conflict has such a plethora of literature and media attention while tensions in places like Jordan, right next door, have not. However, Jordan is an example of a negative case: a country that has, despite its significant tensions, not experienced large-scale violence in …
The Islamic State Of Iraq And The Levant (Isil): Combatting The Challenge Of Post-Modern Islamic Terrorism, Colin M. Bowie
The Islamic State Of Iraq And The Levant (Isil): Combatting The Challenge Of Post-Modern Islamic Terrorism, Colin M. Bowie
MAD-RUSH Undergraduate Research Conference
Author: Colin Bowie
Academic Major(s): International Affairs and Justice Studies
Institution: James Madison University
Presentation Title: The Islamic State of Iraq and the Levant (ISIL): Combatting the Challenge of Postmodern Islamic Terrorism
Abstract: This 38-page white paper examines the causes behind the terrorist group ISIL and ultimately recommends a comprehensive policy to destroy the group and eliminate chances of its revival. The author reviews the history of Al Qaeda in Iraq and the unraveling of Syria during its civil conflict. ISIL’s rise, tactics and its manifestation as a group that actively holds territory is discussed. A literature review then analyzes …
An Exploration Of Gender Roles And The Traditional Dual Gendered Parenting Model Within Co-Fathered Families, Zoe Dearborn Geyman
An Exploration Of Gender Roles And The Traditional Dual Gendered Parenting Model Within Co-Fathered Families, Zoe Dearborn Geyman
MAD-RUSH Undergraduate Research Conference
In this paper I develop a working theory of gender as a constantly performed state of social mimicry that evolves in response to one’s lived experience. Through analysis of transcript selections from the daily lives of two co-fathered families and relevant literature, I explore the gendered realities of gay parents, and introduce work, in this case referring to professional labor and its associated identities, as key to the gendering process. In the paper I also address the malleability of family units, and explore the ways in which gay fathers negotiate pressures to conform to the traditionally gendered family model. Ultimately, …
Reaching Reality: Realistic Portrayals Of Racism, Paige Evans
Reaching Reality: Realistic Portrayals Of Racism, Paige Evans
MAD-RUSH Undergraduate Research Conference
This paper argues that genre is essential to the accurate depiction of racism. By focusing on three landmark texts—Richard Wright’s Native Son, Ralph Ellison’s Invisible Man, and Percival Everett’s Erasure—an overview of the most powerful genres in this discussion is given. The first, Realism, is defined by its determination to show physical reality. The next, Surrealism, is associated with cognitive reality. Poststructuralism, the last genre included, is described as using the cognitive effects of Surrealism to actively commentate and critique the physical realities of Realism. It is this interaction that marks Poststructuralism as the genre best suited …
Sexual Violence On College Campuses: Individual Experience And Collective Silence Among Survivors, Kelsey Ruane
Sexual Violence On College Campuses: Individual Experience And Collective Silence Among Survivors, Kelsey Ruane
MAD-RUSH Undergraduate Research Conference
No abstract provided.
More Than A Housewife: Revolutionary Era Women In War, Claire R. Williams
More Than A Housewife: Revolutionary Era Women In War, Claire R. Williams
MAD-RUSH Undergraduate Research Conference
No abstract provided.
The Velvet Revolution: A Case Study In Strategic Nonviolence, Peter Tkach
The Velvet Revolution: A Case Study In Strategic Nonviolence, Peter Tkach
MAD-RUSH Undergraduate Research Conference
The Velvet Revolution in Czechoslovakia provides a unique case of the successful use of strategic nonviolence. This paper will seek to provide a basic background of the causal events leading to the revolution in 1989. After establishing a suitable background from which to frame the analytical portion of the paper, it will be asked what role nonviolence played in the movement and how that nonviolence was applied strategically to facilitate its goals. In doing so, this paper will draw upon the research of Peter Ackerman and Christopher Kruegler, two leading nonviolent theorists, and their twelve principles of strategic nonviolence. Drawing …
The Dream Of The Rood And Medieval Cross Veneration In Context, Brooke Thomas
The Dream Of The Rood And Medieval Cross Veneration In Context, Brooke Thomas
MAD-RUSH Undergraduate Research Conference
No abstract provided.
Founding The Island Gateway, Christopher Scott Bennett
Founding The Island Gateway, Christopher Scott Bennett
MAD-RUSH Undergraduate Research Conference
No abstract provided.
The Unwanted Immigrant: The Rise Of Californian Nativism From 1849-1860, Frank Anthony Bozich Iii
The Unwanted Immigrant: The Rise Of Californian Nativism From 1849-1860, Frank Anthony Bozich Iii
MAD-RUSH Undergraduate Research Conference
No abstract provided.
“Don’T Call Me A Pothead!” A Qualitative Study Of High Achieving Marijuana Users, Katrina Miles
“Don’T Call Me A Pothead!” A Qualitative Study Of High Achieving Marijuana Users, Katrina Miles
MAD-RUSH Undergraduate Research Conference
No abstract provided.
High & Low Resolution Techniques To Solve Protein Structures, Nathan Wright
High & Low Resolution Techniques To Solve Protein Structures, Nathan Wright
Science Enabled by Photon Sources: Local Research Interests in Virginia
Protein structure and dynamics form the platform on which almost all biomedical research is currently based, including hot topics like computer-aided drug design and established problems like creating a cure for cancer. Since most proteins are too small to visualize with even an electron microscope, biochemists must use either NMR spectroscopy or x-ray diffraction to determine what the structures look like. In my lab, we combine both techniques to describe fundamentally how normal and mutated proteins behave in muscle cells. We are specifically interested in the structural protein obscurin. This giant muscle protein helps to organize muscle cells, sense muscle …
Optical Techniques To Probe Internal Dynamics Of Soft Materials, Klebert Feitosa
Optical Techniques To Probe Internal Dynamics Of Soft Materials, Klebert Feitosa
Science Enabled by Photon Sources: Local Research Interests in Virginia
Like many other soft materials, foam displays complex fluid behavior. Under different circumstances it may behave like an elastic solid or a typical fluid depending on driving forces and the interactions between individual bubbles. To understand the inherent complexities of foam flow, an effective method to visualize its internal structure and dynamics is paramount. In this talk, I will introduce two techniques we have used in our lab to probe foam dynamics at the bubble level: optical tomography and confocal microscopy. The results show great promise to unveil the internal mechanisms that lead to the complex fluid behavior of foams.
X-Ray Fluorescence Microscopy: A Tool For Biology, Life Science & Nanomedicine, Stafan Vogt
X-Ray Fluorescence Microscopy: A Tool For Biology, Life Science & Nanomedicine, Stafan Vogt
Science Enabled by Photon Sources: Local Research Interests in Virginia
Trace elements, in particular metals, play a significant role in most known life forms. It is estimated that one-third of all known proteins contain metal cofactors, and the majority of these function as essential metalloenzymes catalyzing biochemical reactions. Trace metals are increasingly recognized as having a critical impact on human health both in their natural occurrence and via therapeutic drugs (e.g., environmental exposure to heavy metals, treatment with cisplatin-based drugs in chemotherapy, ...), and in diseases such as Alzheimer’s. Quantitative study of the distribution of trace elements on the cellular and subcellular level provide important information about functions and pathways …
Harvesting Heat Through Seebeck Spin Tunneling Effect, Costel Constantin
Harvesting Heat Through Seebeck Spin Tunneling Effect, Costel Constantin
Science Enabled by Photon Sources: Local Research Interests in Virginia
Harvesting the wasted heat released in the atmosphere by electronic devices has become an important issue in microelectronics as devices shrink toward nanoscale dimensions while achieving an increase in operating speed. Spintronic devices that make use of electrons’ spin as an information carrier offer a promising path to create novel efficient devices thus reducing this wasted heat. Thermoelectronics, on the other hand, explores the possibility of converting heat into electrical power. Spin caloritronics is an exciting new research field that takes advantage of both spintronics and thermoelectronics. In this talk, I will present the design of a spin caloritronic device …
The Role Of Photon Sources In Materials Research: Past, Present, & Future, E. Ward Plummer
The Role Of Photon Sources In Materials Research: Past, Present, & Future, E. Ward Plummer
Science Enabled by Photon Sources: Local Research Interests in Virginia
In this lecture I will trace the development of Light Sources from the early days of parasitic operation to the new billion dollar dedicated facilities. Clearly, the mode of usage has changed, but so has the type of user. How have these facilities balanced the need for beyond the state-of-the art experiments and serving the needs for routine characterization of materials? How can and should these facilities address the needs for the development of a workforce needed for the next generation of machines and science? Have they produced the science and scientists anticipated? Where do we go next, what is …
Pmma Nanocomposites Composed Of Optically Active Doped Inorganic Nanocrystals, Kyle Gipson
Pmma Nanocomposites Composed Of Optically Active Doped Inorganic Nanocrystals, Kyle Gipson
Science Enabled by Photon Sources: Local Research Interests in Virginia
As technology advances, more efficient, cost-effective materials and processes are being developed to serve the duties of optical materials within networks. As light transfers data through polymer optical materials, the polymeric matrix absorbs the signal and this phenomenon is known as attenuation. Attenuation occurs via the higher vibrational energies with respect to fluoropolymers that are inherent with hydrocarbon amorphous polymers like polymethyl methacrylate (PMMA).
One solution to realize efficient light emission is to incorporate nanoparticles into the polymer matrix. In the research presented, aqueous solution-polymer precipitation was used to synthesize light harvesting ligand capped luminescent nanoparticles. Tb3+:LaF3 was the chromophore …
Optical Properties& Energy Transfer Dynamics Of Atmospheric Species, Daniel K. Havey
Optical Properties& Energy Transfer Dynamics Of Atmospheric Species, Daniel K. Havey
Science Enabled by Photon Sources: Local Research Interests in Virginia
Our research group is interested in how light interacts with small molecules and particulate matter that are important to atmospheric chemistry and climate change. An active project currently being performed in the James Madison University Undergraduate Laser Laboratory involves a detailed mapping of energy transfer rates from excited or metastable states of atomic or molecular species. This talk describes a specific example study with potential relevance to the JLAMP VUV/Soft X-ray User Facility that would investigate relaxation dynamics of metastable Krypton atoms using two-photon photoacoustic spectroscopy at 819 nm and 124 nm. A study like this would provide useful reference …
Surface Modification & Characterization Of Nano-Composite Polymers, Chris Hughes, Brian Augustine
Surface Modification & Characterization Of Nano-Composite Polymers, Chris Hughes, Brian Augustine
Science Enabled by Photon Sources: Local Research Interests in Virginia
We have studied the modification of surfaces of both PMMA and nano-composite polyhedral oligomeric silsesquioxane (POSS) containing acrylics. These nano-composites can be spun cast from a variety of solvents and the surface chemistry can be modified by exposure to oxygen-containing plasmas. However, we have found that interesting surface structure evolve over the space of several hours after these films are deposited. We have also found that the solvent used for the spin casting of these layers can alter the behaviors of these surfaces. In particular, we found that halogenated solvents can form complexes with the PMMA backbone to increase the …
Research Potential Of The Twisted Photon Beams, Andrei Afanasev
Research Potential Of The Twisted Photon Beams, Andrei Afanasev
Science Enabled by Photon Sources: Local Research Interests in Virginia
The fact that photon beams can carry large orbital angular momenta was pointed out in a pioneering work by Allen and collaborators [1] and was later demonstrated experimentally. When quantized, such beams can be described in terms of twisted photons [2] that have a peculiar property: their total angular momentum projected on the direction of propagation may range from a few to hundreds of units of h. Accelerator-based light sources may generate such twisted light with high intensities, leading to new applications in several fields of physics. Examples of such applications will be presented in this talk.
[1.] L. Allen …
Development Of A 60,000 Rpm X-Ray Chopper With 25 Nsec Phase Jitter For Crystallography, Eric Maslen
Development Of A 60,000 Rpm X-Ray Chopper With 25 Nsec Phase Jitter For Crystallography, Eric Maslen
Science Enabled by Photon Sources: Local Research Interests in Virginia
A high speed X-Ray chopper (mechanical shutter) was developed for sub microsecond time-resolved photocrystallography using a synchrotron source. Based on a rim-slotted titanium wheel rotating at a nominal 60,000 r/min, the device has an upper bound timing alignment (aperture passage compared to source pulse edge) jitter of 23 nsec RMS and has been operated consistently at jitters as low as 7 nsec RMS. The spindle was derived from a commercial turbo-molecular pump whose drive was adapted in a fairly simple manner to enable fine control by a secondary wheel phase regulator using conventional, off-the-shelf components. Because the spindle uses magnetic …
Imaging And Rheology Of Complex Granular & Granular-Fluid Flows, Brian Utter
Imaging And Rheology Of Complex Granular & Granular-Fluid Flows, Brian Utter
Science Enabled by Photon Sources: Local Research Interests in Virginia
Granular materials are ubiquitous in nature and industry, from avalanches to the mixing of pharmaceuticals, yet the behavior of these “fluids” is poorly understood. While individual particles interact simply through friction and inelastic collisions, the non-linear forces and large number of particles leads to an unpredictable, complex system. History dependence, strong fluctuations and sudden failure are commonly observed, making predictive equations of macroscopic flow difficult or impossible to determine. Our recent work focuses on jamming, avalanching and shear banding in dense granular and granular-fluid flows and, in particular, the effects of external vibration and surface chemistry on flow properties. Ongoing …