cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analytical Transmission Electron Microscopy of InAs/GaAs quantum dots and GaInNAs/GaAs quantum wells
Creators: name: Kadkhodazadeh, Shima
Publisher: name: Imperial College London
Year: 2009

description: Structure and chemical composition of InAs/GaAs quantum dots and GaInNAs/GaAs quantum wells were investigated using analytical transmission electron microscopy. These material systems are of importance for fabricating optoelectronic devices capable of operating in the 1.3 – 1.55 μm wavelength range. The samples were grown by molecular beam epitaxy. The optical properties of the quantum dots and quantum wells are largely determined by their structure and composition. Properties such as the shape, size and composition of the InAs/GaAs quantum dots and the morphology and composition of the GaInNAs/GaAs quantum wells were studied using high angle annular dark field imaging and electron energy-loss spectroscopy. In the case of the InAs/GaAs quantum dots, in particular, the effects of the GaAs spacer layer thickness in bilayer quantum dots and overgrowing the quantum dots with GaInAs instead of GaAs on the properties of the dots were investigated. The results indicated that the GaAs spacer layer can have a significant influence on the shape, size and nucleation position of the quantum dots in the second layer. In addition to this, it was demonstrated that overgrowing the quantum dots with GaInAs instead of GaAs introduces smaller changes to the structure and composition of the dots. In case of the quantum wells, the influence of the growth temperature and In composition on their morphology and composition were examined. Higher growth temperatures and In contents were shown to lead to the degradation of the 2D morphology and formation of inhomogeneities in the chemical composition of the quantum wells. When correlated with the optical performance of these structures, these results can provide important information about their structure – property relationships. Finally, the possibility of utilising electron energy-loss spectroscopy in monochromated transmission electron microscopy instruments to measure and map the band gap of semiconductor structures was studied and the results discussed.
Non-Linear Realization of ${\aleph_0}$-Extended Supersymmetry
Creators: name: Nishino, Hitoshi
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As generalizations of the original Volkov-Akulov action in four-dimensions, actions are found for all space-time dimensions D invariant under N non-linear realized global supersymmetries. We also give other such actions invariant under the global non-linear supersymmetry. As an interesting consequence, we find a non-linear supersymmetric Born-Infeld action for a non-Abelian gauge group for arbitrary D and N, which coincides with the linearly supersymmetric Born-Infeld action in D=10 at the lowest order. For the gauge group U({\cal N}) for M(atrix)-theory, this model has {\cal N}^2-extended non-linear supersymmetries, so that its large {\cal N} limit corresponds to the infinitely many (\aleph_0) supersymmetries. We also perform a duality transformation from F_{μν} into its Hodge dual N_{μ_1...μ_{D-2}}. We next point out that any Chern-Simons action for any (super)groups has the non-linear supersymmetry as a hidden symmetry. Subsequently, we present a superspace formulation for the component results. We further find that as long as superspace supergravity is consistent, this generalized Volkov-Akulov action can further accommodate such curved superspace backgrounds with local supersymmetry, as a super p-brane action with fermionic kappa-symmetry. We further elaborate these results to what we call `simplified' (Supersymmetry)^2-models, with both linear and non-linear representations of supersymmetries in superspace at the same time. Our result gives a proof that there is no restriction on D or N for global non-linear supersymmetry. We also see that the non-linear realization of supersymmetry in `curved' space-time can be interpreted as `non-perturbative' effect starting with the `flat' space-time.
description: 29 pages, latex, no figures
Simulated Annealing Clusterization Algorithm for Studying the Multifragmentation
Creators: name: Puri, Rajeev K.
name: Aichelin, Joerg
Publisher: name: arXiv
Year: 1998
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present the details of the numerical realization of the recently advanced algorithm developed to identify the fragmentation in heavy ion reactions. This new algorithm is based on the Simulated Annealing method and is dubbed as Simulated Annealing Clusterization Algorithm [SACA]. We discuss the different parameters used in the Simulated Annealing method and present an economical set of the parameters which is based on the extensive analysis carried out for the central and peripheral collisions of Au-Au, Nb-Nb and Pb-Pb. These parameters are crucial for the success of the algorithm. Our set of optimized parameters gives the same results as the most conservative choice, but is very fast. We also discuss the nucleon and fragment exchange processes which are very important for the energy minimization and finally present the analysis of the reaction dynamics using the new algorithm. This algorithm is can be applied whenever one wants to identify which of a given number of constituents form bound objects.
description: 36 pages, 15 figures, submitted to Journal of Computational Physics
Cracking and complexity of self-gravitating dissipative compact objects
Creators: name: Herrera, L.
name: Di Prisco, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The concept of cracking refers to the tendency of a fluid distribution to "split'', once it abandons the equilibrium. In this manuscript we develop a general formalism to describe the occurrence of cracking within a dissipative fluid distribution, in comoving coordinates. The role of dissipative processes in the occurrence of cracking is brought out. Next, we relate the occurrence of cracking with the concept of complexity for self-gravitating objects defined in [1-3]. More specifically we relate the occurrence of cracking with the condition of the vanishing of the scalar function intended to measure the complexity of the fluid distribution (the complexity factor). We also relate the occurrence of cracking with the specific mode of leaving the equilibrium. Thus, we prove that leaving the equilibrium in either, the homologous (H), or the quasi--homologous regime (QH), prevents the occurrence of cracking. Also, it is shown that imposing the condition of vanishing complexity factor alone, (independently of the mode of leaving the equilibrium) prevents the occurrence of cracking in the non-dissipative geodesic case, and in the non-dissipative isotropic case. These results bring out further the relevance of the complexity factor and its related definition of complexity, in the study of self-gravitating systems.
description: 13 pages Revtex-4, 1 figure. Published in PRD
The Planckian Conspiracy: String Theory and the Black Hole Information Paradox
Creators: name: Lowe, David A.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been argued that the consistency of quantum theory with black hole physics requires nonlocality not present in ordinary effective field theory. We examine the extent to which such nonlocal effects show up in the perturbative S-matrix of string theory.
description: 13 pages, harvmac
Achieving Mental Health Parity: A Rhetorical Analysis of Social Change
Creators: name: Deems, Julia
Publisher: name: Carnegie Mellon University
Year: 2018
Subjects: Rhetoric

description: Congressional rhetoric has commonly taken one of two forms: studies of political leaders or studies of the settling of political argument. Our understanding of other components of congressional rhetoric, including the role of public testimony, is less well developed. Further study of congressional rhetoric is critical to our understanding of political decision-making. Public testimony is central to deliberative democracy, in which an engaged citizenry provides reasons for policy decisions. I examine public testimony, the written response to legislation prepared in advance and presented orally before congressional committee.
Public testimony benefits the public as a forum in which to express support or concerns and as a public record of congressional reasoning; it simultaneously benefits legislators, in that testimony clarifies problems, identifies goals, suggests solutions, and provides a source for rhetorical strategy. Public testimony on mental health parity legislation, including the Mental Health Parity Act of 1996 and legislation integrated into the Affordable Care Act, and was considered by Congress for more than two decades and offers a rich site for investigation. In part, this research examines claims made by stakeholder groups as they define the policy problem. Findings suggest that public testimony does more than respond to the legislation: it expands the policy issue and sets the agenda for additional legislative change. Better understanding the role of public testimony can expand and strengthen its use.
Mental health parity legislation aims to address discrepancies between insurance provisions for mental health care relative to medical care. While public opinion polls have long demonstrated support for parity, enacting legislation proved challenging. Legislation was introduced repeatedly, and much legislation was sent to committee for public response. The most direct beneficiaries, the mentally ill and their families, testify. This dissertation asks: Do the mentally ill and their supporters have rhetorical agency? If so, what strategies do they employ? Findings suggest that those that focus on mental illness employ one set of rhetorical strategies, including personal narratives of tragedy and luck, while those that focus on mental wellness employ other strategies. This research has significance for congressional rhetoric, public deliberation, and deliberative democracy.
System Identification with Applications in Speech Enhancement
Creators: name: Lin, Xiang
Publisher: name: Imperial College London
Year: 2009

description: As the increasing popularity of integrating hands-free telephony on mobile portable devices and the rapid development of voice over internet protocol, identification of acoustic systems has become desirable for compensating distortions introduced to speech signals during transmission, and hence enhancing the speech quality. The objective of this research is to develop system identification algorithms for speech enhancement applications including network echo cancellation and speech dereverberation. A supervised adaptive algorithm for sparse system identification is developed for network echo cancellation. Based on the framework of selective-tap updating scheme on the normalized least mean squares algorithm, the MMax and sparse partial update tap-selection strategies are exploited in the frequency domain to achieve fast convergence performance with low computational complexity. Through demonstrating how the sparseness of the network impulse response varies in the transformed domain, the multidelay filtering structure is incorporated to reduce the algorithmic delay. Blind identification of SIMO acoustic systems for speech dereverberation in the presence of common zeros is then investigated. First, the problem of common zeros is defined and extended to include the presence of near-common zeros. Two clustering algorithms are developed to quantify the number of these zeros so as to facilitate the study of their effect on blind system identification and speech dereverberation. To mitigate such effect, two algorithms are developed where the two-stage algorithm based on channel decomposition identifies common and non-common zeros sequentially; and the forced spectral diversity approach combines spectral shaping filters and channel undermodelling for deriving a modified system that leads to an improved dereverberation performance. Additionally, a solution to the scale factor ambiguity problem in subband-based blind system identification is developed, which motivates further research on subbandbased dereverberation techniques. Comprehensive simulations and discussions demonstrate the effectiveness of the aforementioned algorithms. A discussion on possible directions of prospective research on system identification techniques concludes this thesis.
Magnetic Levitation Stabilized by Streaming Fluid Flows
Creators: name: Baldwin, K. A.
name: de Fouchier, J. -B.
name: Atkinson, P.
name: Hill, R. J. A.
name: Swift, M. R.
name: Fairhurst, D. J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We demonstrate that the ubiquitous laboratory magnetic stirrer provides a simple passive method of magnetic levitation, in which the so-called `flea' levitates indefinitely. We study the onset of levitation and quantify the flea's motion (a combination of vertical oscillation, spinning and "waggling"), finding excellent agreement with a mechanical analytical model. The waggling motion drives recirculating flow, producing a centripetal reaction force that stabilises the flea. Our findings have implications for the locomotion of artificial swimmers, for the development of bidirectional microfluidic pumps and provide an alternative to sophisticated commercial levitators.
description: 5 pages, 3 figures, SI material included as pdf
D1 and D5-Brane Actions in AdS_m x S^n
Creators: name: Dawson, P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The kappa-invariant and supersymmetric actions of D1 and D5-branes in AdS_3 x S^3 are investigated, as well as the action of a D5-brane in an AdS_5 x S^5 background. The action of a D5-brane lying totally in an AdS_3 x S^3 background is found. Some progress was made towards finding the action for the D5-brane free to move in the whole AdS_3 x S^3 x T^4 space, however the supersymmetric action found here is not kappa-invariant and the reasons the method used did not find a kappa-invariant solution are discussed.
description: 17pp, Latex, improved explanations, a definition added
Solar signals in sea level pressure and sea surface temperature
Creators: name: Roy, Indrani
Publisher: name: Imperial College London
Year: 2010

description: We investigate solar cycle signals in 150 years of Sea Level Pressure (SLP) and Sea Surface Temperature (SST) data, using multiple regression analysis. We detect a solar signal in both SLP and SST in the North Pacific during DJF, similar to that found by Van Loon et al. (2007) but of smaller magnitude. We do not, however, identify the signal they found in the tropics. Our results do not support mechanisms for a solar influence on climate directly involving tropical SSTs. We have used different reconstructions of total solar irradiance to investigate the sensitivity of the results. The series of Krivova & Solanki and Foster give similar results to those acquired using sunspot number but the Hoyt & Schatten solar index sometimes produces different results because of mixing of the solar signal with a long-term trend. Using different approaches Labitzke and van Loon (1992) and Camp and Tung (2007), arrived at different results for a solar influence on winter stratospheric polar temperatures and its relationship to the quasi-biennial oscillation (QBO) in tropical stratospheric zonal winds. We show that these differences appear different largely because of their choices of QBO height. We also show that the effect of the QBO (30, 40 or 50 hPa) combined with solar activity reveals a clear signal in polar annular modes expressed in SLP. We show that the nature of ENSO was different before 1950s (and after1997): this may affect any solar influence. Other authors have suggested that tropical circulations were different during the intervening period. Such observation may have implications relating to the sun, tropical circulation and climate change. During 1958-1997, omission of ENSO from regression gives false warming (cooling) signal of higher (lower) solar on SST in tropics. Such analysis, accompanied by our observation that the years of peak annual sunspot number used by van Loon et al. (2007) generally falls a year or more in advance of the maximum of the smoothed DSO, provides coherence to some apparently conflicting findings. Finally, an atmosphere-ocean coupling process, (mainly involving the Pacific Ocean) is proposed to account for the solar influences. This coupling appears to be disturbed during the later half of the 20th century, probably due to climate change.
Wikidata, Wikibase, and a federated ecosystem of structured knowledge for open science
Creators: name: Mietchen, Daniel
name: Taraborelli, Dario
Publisher: name: figshare
Year: 2018
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: Library and Information Studies
subject: FOS: Media and communications
subject: 80602 Computer-Human Interaction
subject: FOS: Psychology
subject: Digital Humanities

description: Slides from our FORCE 2018 talk on "Wikidata, Wikibase, and a federated ecosystem of structured knowledge for open science".
Xenotarsonemus spiniphorus Lofego, Moraes & Ochoa 2007
Creators: name: LIU, DONG
name: YI, TIAN-CI
name: XU, YUN
name: ZHANG, ZHI-QIANG
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Tarsonemidae
Xenotarsonemus
Xenotarsonemus spiniphorus

description: Xenotarsonemus spiniphorus Lofego, Moraes & Ochoa, 2007: 11
— Holotype female (ESALQ/USP), from Myrcia venulosa DC. (Myrtaceae), Pirassununga, State of São Paulo, Brazil.
description: Published as part of LIU, DONG, YI, TIAN-CI, XU, YUN & ZHANG, ZHI-QIANG, 2013, Hotspots of new species discovery: new mite species described during 2007 to 2012, pp. 1-102 in Zootaxa 3663 (1) on page 68, DOI: 10.11646/zootaxa.3663.1.1, http://zenodo.org/record/5630595
The role of inflammatory cytokines and hypoxia in varicose vein wall remodelling
Creators: name: Saunders, Beverley
Publisher: name: Imperial College London
Year: 2009

description: Varicose Veins (VV) affect 10-40% of 30-70 year olds. They have a prominent twisted appearance caused by changes in vein wall thickness. Primary weakening of the vein wall, due to an imbalance in matrix metalloproteinase enzymes (MMP) and their inhibitors (TIMP), is thought to have a major role in homeostasis of extracellular matrix. This could cause dilatation of the vessel wall and dysfunction of the valve cusps resulting in reflux. This could be contributed to by other factors such as an inflammatory response involving cytokinemediated cellular infiltration and/or hypoxia. My study examined mRNA expression in VVs, compared with veins from other sources (VOS), of MMP and TIMP with pro-inflammatory and pro-angiogenic cytokines (TNF-α, IL-1β, IL-6 and VEGF). In parallel I examined expression of hypoxia-regulated transcription factors (HIF). Cell culture was performed on Human Saphenous Vein Endothelial Cells (HSVEC) and HMEC-1 cells exposed to differing degrees of hypoxia. I have shown a significant difference between VVs and VOS in expression of TIMP- 2, -3 and IL-1β. I have demonstrated a significant correlation between VEGF and TIMP-3, TNF-α and MMP-2, MT1-MMP, TIMP-2 and TIMP-3 and IL-1β and MMP-2, MT1-MMP and TIMP-2. This study has also described, for the first time, HIF-1α and HIF-2α expression in VV, and shows that mRNA for both HIFs is significantly reduced in VVs when compared to VOS. HIF-1α significantly correlates with MMP-2, TNF-α and IL-1β, whereas HIF-2α significantly correlates with MT1-MMP and TNF-α. Cell culture studies revealed little difference between different times of hypoxic exposure on mRNA expression of MMP-2, MT1-MMP and TIMP-2 in either cell type. However there was a significant increase in TIMP-3 as the degree of hypoxia increased. These data suggest that alterations in MMP/TIMP, possibly favouring matrix degradation leading to vein wall weakness and dilatation, may be mediated both by changes in inflammatory signals and/or by alterations in oxygen tension.
Quantum Magnetism, Spin Waves, and Light
Creators: name: Kusminskiy, Silvia Viola
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Both magnetic materials and light have always played a predominant role in information technologies, and continue to do so as we move into the realm of quantum technologies. In this course we review the basics of magnetism and quantum mechanics, before going into more advanced subjects. Magnetism is intrinsically quantum mechanical in nature, and magnetic ordering can only be explained by use of quantum theory. We will go over the interactions and the resulting Hamiltonian that governs magnetic phenomena, and discuss its elementary excitations, denominated magnons. After that we will study magneto-optical effects and derive the classical Faraday effect. We will then move on to the quantization of the electric field and the basics of optical cavities. This will allow us to understand a topic of current research denominated Cavity Optomagnonics. These notes were written as the accompanying material to the course I taught in the Summer Semester 2018 at the Friedrich-Alexander University in Erlangen. The course is intended for Master or advanced Bachelor students. Basic knowledge of quantum mechanics, electromagnetism, and solid state at the Bachelor level is assumed. Each section is followed by a couple of simple exercises which should serve as to "fill in the blanks" of what has been derived, plus specific references to bibliography, and a couple of check-points for the main concepts developed. The figures are pictures of the blackboard taken during the lecture.
description: Class notes, revised version, typos corrected, figures added
$ωN$ final state interactions and $ω$-meson production from heavy-ion collisions
Creators: name: Lykasov, G. I.
name: Cassing, W.
name: Sibirtsev, A.
name: Rzjanin, M. V.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the elastic and inelastic $ωN\to ωN, \to πN, \to ρN, \to ρπN, \to ππN, \to σN$ reactions within a boson exchange approximation where the $ωρπ$ coupling constant and form factor are fixed by the reaction $πN \to ωN$ in comparison to the experimental data. We find rather large $ωN$ cross sections at low relative momenta of the $ω$-meson which leads to a substantial broadening of the $ω$-meson width in nuclear matter. The implications of the $ωN$ final state interactions are studied for $ω$ production in $^{12}C{+}^{12}C, ^{40}Ca{+}^{40}Ca$ and $^{58}Ni{+}^{58}Ni$ reactions at about 2 A GeV within the HSD transport approach; the drastic changes of the transverse mass spectra relative to a general m_T-scaling (for $π^0$ and $η$ mesons) might be controlled experimentally by the TAPS Collaboration.
description: Changed content. 10 pages. 17 figures
LABCOM Summary Sheet from Directorate of Facilities Engineering to Colonel Stephen H. Young, Memorandum of Agreement
Creators: name: Bennett, Clara L.
Publisher: name: Directorate of Facilities Engineering
Year: 1990
Subjects: Charles County (County)
Nanjemoy Creek
Potomac River
Maryland (State / Territory)
Port Tobacco River
Blossom Point, MD
Cedar Neck Point
18CH216
Ballast House
Domestic Structures
House
Domestic Structure or Architectural Complex
Collections Management
Heritage Management

description: A summary sheet requesting the approval and signature on Maryland SHPO letter regarding the new Memorandum of Agreement for the Blossom Point Farmhouse, Blossom Point Field Test Facility. Also included is a letter from Kise Franks & Straw to the U.S. Army Corps of Engineers, Fort Worth District regarding the Blossom Point Marketing Plan.
On the Quantum Moduli Space of Vacua of $N=2$ Supersymmetric $SU(N_c)$ Gauge Theories
Creators: name: Hanany, Amihay
name: Oz, Yaron
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct families of hyper-elliptic curves which describe the quantum moduli spaces of vacua of $N=2$ supersymmetric $SU(N_c)$ gauge theories coupled to $N_f$ flavors of quarks in the fundamental representation. The quantum moduli spaces for $N_f < N_c$ are determined completely by imposing $R$-symmetry, instanton corrections and the proper classical singularity structure. These curves are verified by residue and weak coupling monodromy calculations. The quantum moduli spaces for $N_f\geq N_c$ theories are parameterized and their general structure is worked out using residue calculations. Global symmetry considerations suggest a complete description of them. The results are supported by weak coupling monodromy calculations. The exact metrics on the quantum moduli spaces as well as the exact spectrum of stable massive states are derived. We find an example of a novel symmetry of a quantum moduli space: Invariance under the exchange of a moduli parameter and the bare mass. We apply our method for the construction of the quantum moduli spaces of vacua of $N=1$ supersymmetric theories in the coulomb phase.
description: 35 pages, latex
Email from Robert Craig to Multiple Parties, First Draft Scope of Work for Phase II Study
Creators: name: Craig, Robert
Year: 2000
Subjects: Charles County (County)
Nanjemoy Creek
Potomac River
Maryland (State / Territory)
Port Tobacco River
Blossom Point, MD
Cedar Neck Point
18CH156
18CH219
18CH214
18CH483
Collections Management
Heritage Management

description: Email and first draft for the scope of work entitled Phase II Archaeological Investigation in Support of Proposed Small Caliber Arms Range at Blossom Point Research Facility.
Adelphi, MD Field Book, 2000.030_0192
Creators: name: K. Wilson
Year: 1995
Subjects: Maryland (State / Territory)
Collections Management
Heritage Management

description: Field book of various notes about what was found in an archaeological survey done in Adelphi, MD. The notes cover the dates August 14, 1995 through August 15, 1995.
Field Notes for the Adelphi Site, 2000.030_0196
Creators: name: Holland-Lilly, Mimi
Year: 1995
Subjects: Maryland (State / Territory)
Collections Management
Heritage Management

description: Field notes for a Phase II investigation at the Adelphi sites written by Mimi Holland-Lilly. Dates range from August 9, 1995 to August 10, 1995.
Morphology of coronal mass ejections between the sun and the earth
Creators: name: Savani, Neel P
Publisher: name: Imperial College London
Year: 2010

description: The theme of my PhD has been to investigate the global shape and size of coronal mass ejections, or CMEs, as they propagate from the Sun towards the Earth. CMEs are large eruptive events originating from previously magnetically confined structures in the solar atmosphere. These phenomena are the single biggest drivers for geomagnetic disturbances at Earth. My research is focused on analysing spacecraft data obtained both by imaging observations and in situ instrumentation. The three pieces of work presented in this thesis are summarised below: Using the NASA STEREO mission, launched in 2006, I have analysed data from the Heliospheric Imager (HI) instruments. This new instrument is uniquely positioned to observe CMEs as they propagate away from the Sun into the inner heliosphere between 0.1 and 1 AU. Using this data I have been able to estimate the radial expansion of a single CME as it propagates in the inner heliosphere. Investigating another case study event seen by STEREO-B in November 2007, I have been able to show that the distortion of a CME can be directly attributed to a structured solar wind. By using a 3D MHD simulation of the solar wind in the vicinity of the CME, it has been shown that a bimodal velocity structure within this solar wind was driving the CME from behind and distorting it from a circular to a concave morphology. Using in situ data, I have also attempted to deduce the shape of CMEs in the inner heliosphere. To do this I analysed the shock wave driven ahead of the propagating CME, applying a technique previously used to predict the distance of the shock upstream of Earth’s magnetosphere - this distance can be predicted when the object’s shape (Earth) is known. I have carried out a statistical survey of many CMEs over a range of distances from the Sun, and compared them to theoretical predictions of their shape based on geometry.
Blossom Point Phase II Artifact Inventory, 18CH156 Excavation and STPS, 2002.022_0017, N.D.
Creators: name: System User
Year: 2018
Subjects: Maryland (State / Territory)
18CH156
Ceramic
Chipped Stone
Fire Cracked Rock
Collections Management
Data Recovery / Excavation
Heritage Management

description: Artifact inventory for the Blossom Point Phase II excavation and shovel test pits.
The regulation of tumor necrosis factor-alpha converting enzyme (TACE/ADAM17) during acute inflammation
Creators: name: Scott, Alasdair James
Publisher: name: Imperial College London
Year: 2010

description: The systemic inflammatory response syndrome (SIRS) describes the immune response to an insult that is inappropriate for a patient’s biological needs. Tumour necrosis factor-α (TNF) is one of the principal pro-inflammatory cytokines that mediates SIRS. TNF-α converting enzyme (TACE) is responsible for the ectodomain cleavage of numerous immunologically relevant substrates including TNF, both TNF receptors and the cellular adhesion molecule L-selectin. The biological significance of TACE lays in its ability to control the availability of these key mediators of the immune response in their membrane-bound and soluble forms. Little is known concerning the regulation of TACE-mediated ectodomain shedding and it contributes to disease pathophysiology. Our objective was to investigate the regulation of TACE catalytic activity and expression during acute inflammation in vitro and in vivo. Our aims were: 1) define the pathways mediating upregulation of TACE activity in primary human monocytes; 2) compare the regulation of TACE catalytic activity and TACE substrate shedding; 3) investigate the acute inflammatory response in elective surgical patients with particular focus on three potential biomarkers of inflammation: TACE expression, HLA-DR expression and circulating monocyte subset populations. We used a fluorimetric assay of TACE activity to demonstrate that lipopolysaccharide (LPS) stimulation of primary human monocytes promotes rapid upregulation of TACE activity, independently of changes in TACE expression. TACE activity upregulation was mediated by reactive oxygen species-induced activation of the p38 MAPK-MK2 pathway. Dithiol oxidation was found to induce L-selectin shedding but to attenuate LPS-induced TACE activity upregulation. Investigation of this paradox revealed that L-selectin shedding may be independent of TACE activity upregulation. Monocyte TACE expression was not modified by low to intermediate risk surgery. In contrast, surgery resulted in downregulation of monocyte HLA-DR expression and differential trafficking of monocyte subsets. These data provide insight into the regulation of TACE during acute inflammation.
Phase I Archaeological Survey of Twelve Areas at the Blossom Point Field Test Facility (BPFTF) Charles County, Maryland
Creators: name: Thomas, Ronald A.
name: Reinhold, Martin B.
Publisher: name: Geo-Marine, Inc.
Year: 1996
Subjects: Charles County (County)
Nanjemoy Creek
Potomac River
Maryland (State / Territory)
Port Tobacco River
Blossom Point, MD
Cedar Neck Point
18CH162
18CH227
18CH160
18CH157
18CH161
18CH479
18CH214
18CH480
18CH481
18CH482
18CH483
18CH484
Domestic Structures
House
Archaeological Feature
Tobacco Press
Shell Midden
Lithic Scatter
Midden
Shell
Ceramic
Chipped Stone
Fauna
Fire Cracked Rock
Glass
Quartz
Metal
Mineral
Shotgun shell
Collections Management
Heritage Management

description: A Phase I archeological survey of 12 selected areas totaling 250 acres at the Blossom Point Field Test Facility (BPFTF) in Charles County, Maryland, was conducted during the summer of 1993 by MAAR Associates, Inc. (MAI), of Newark, Delaware. MAI conducted the survey as a subcontractor to Geo-Marine, Inc. (GMI), of Plano, Texas, under contract with the U.S. Army Corps of Engineers, Fort Worth District, Fort Worth, Texas. The survey was undertaken as part of the compliance with Section 106 and Section 110 of the National Historic Preservation Act of 1966, as amended through 1992; Executive Order 11593, Protection and Enhancement of the Cultural Environment; and the management plan established in An Archeological Overview and Management Plan for the Harry Diamond Laboratories - Blossom Point Test Site (Gardner et al. 1985:6-6). The purpose of this survey was to locate and identify any cultural resources sites within the selected areas and to make management recommendations for any further appropriate action. MAI crews initially conducted a pedestrian reconnaissance in areas where artifacts could be observed at ground surface. Subsurface testing was also conducted, as well as limited testing in areas, where previously located sites had been identified. Although the vegetation varied greatly from area to area, surface visibility was generally low and subsurface shovel testing proved to be the major means of site location. A total of 28 sites (18 prehistoric and 10 historic) had been previously recorded at the BPFTF. An additional seven sites (18CH479, 18CH480, 18CH481, 18CH482, 18CH483, 18CH484, and 18CH485) have been recorded as a result of the current survey by MAI. Four sites are purely prehistoric sites and three sites contain both prehistoric and historic components. Fourteen sites, nine previously identified and five newly recorded sites, are recommended for a Phase II survey.
Geometry of coadjoint orbits and multiplicity-one branching laws for symmetric pairs
Creators: name: Kobayashi, Toshiyuki
name: Nasrin, Salma
Publisher: name: arXiv
Year: 2018
Subjects: subject: Representation Theory (math.RT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: Consider the restriction of an irreducible unitary representation $π$ of a Lie group $G$ to its subgroup $H$. Kirillov's revolutionary idea on the orbit method suggests that the multiplicity of an irreducible $H$-module $ν$ occurring in the restriction $π|_H$ could be read from the coadjoint action of $H$ on $O^G \cap pr^{-1}(O^H)$ provided $π$ and $ν$ are "geometric quantizations" of a $G$-coadjoint orbit $O^G$ and an $H$-coadjoint orbit $O^H$,respectively, where $pr: \sqrt{-1} g^{\ast} \to \sqrt{-1} h^{\ast}$ is the projection dual to the inclusion $h \subset g$ of Lie algebras. Such results were previously established by Kirillov, Corwin and Greenleaf for nilpotent Lie groups. In this article, we highlight specific elliptic orbits $O^G$ of a semisimple Lie group $G$ corresponding to highest weight modules of scalar type. We prove that the Corwin--Greenleaf number $\sharp(O^G \cap pr^{-1}(O^H))/H$ is either zero or one for any $H$-coadjoint orbit $O^H$, whenever $(G,H)$ is a symmetric pair of holomorphic type. Furthermore, we determine the coadjoint orbits $O^H$ with nonzero Corwin-Greenleaf number. Our results coincide with the prediction of the orbit philosophy, and can be seen as "classical limits" of the multiplicity-free branching laws of holomorphic discrete series representations (T.Kobayashi [Progr.Math.2007]).
description: Kirillov volume
Record of Environmental Consideration to Expand Street Light System
Creators: name: Division Of Public Works
Publisher: name: U.S. Army Research Laboratory
Year: 1995
Subjects: Charles County (County)
Nanjemoy Creek
Potomac River
Maryland (State / Territory)
Port Tobacco River
Blossom Point, MD
Cedar Neck Point
18CH216
Ballast House
Collections Management
Heritage Management

description: Record of Environmental Consideration to expand the street light system. Included are two maps that show where the lights will be added, six pictures of the roads that will have the lights added, and the size of the lights to be installed.
On-World Computing: Enabling Interaction on Everyday Surfaces
Creators: name: Xiao, Bo
Publisher: name: Carnegie Mellon University
Year: 2018
Subjects: subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: Computers are now ubiquitous. However, computers and digital content have remained largely separate from the physical world – users explicitly interact with computers through small screens and input devices, and the “virtual world” of digital content has had very little overlap
with the practical, physical world. My thesis work is concerned with helping computing escape the confines of screens and devices, to spill digital content out into the physical world around us. In this way, I aim to help bridge the gap between the information-rich digital world and the
familiar environment of the physical world and allow users to interact with digital content as they would ordinary physical content. I approach this problem from many facets: from the lowlevel work of providing high-fidelity touch interaction on everyday surfaces, easily transforming these surfaces into enormous touchscreens; to the high-level questions surrounding the interaction design between physical and virtual realms. To achieve this end, building on my prior
work, I develop two physical embodiments of this new mixed-reality design: a tiny, miniaturized projector and camera system providing the hardware basis for a projected on-world interface, and a head-mounted augmented-reality head-mounted display modified to support touch interaction
on arbitrary surfaces.
Confinement and the AdS/CFT Correspondence
Creators: name: Berman, D. S.
name: Parikh, Maulik K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the thermodynamics of the confined and unconfined phases of superconformal Yang-Mills in finite volume and at large N using the AdS/CFT correspondence. We discuss the necessary conditions for a smooth phase crossover and obtain an N-dependent curve for the phase boundary.
description: 12 pages, 1 figure, RevTeX
Coherent QED, Giant Resonances and $(e^{+}e^{-})$ Pairs in High Energy Nucleus-Nucleus Collisions
Creators: name: Alzetta, R.
name: Bubba, T.
name: Pera, R. Le
name: Liberti, G.
name: Mileto, G.
name: Tarantino, D.
name: Preparata, G.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that the coherent oscillations of the e.m. field induced by the collective quantum fluctuations of the nuclear matter field associated with the giant resonances, with frequencies $ω_{A}\simeq 78A^{-{1/3}}$ MeV, give rise to a significant $(e^+e^-)$ pair production in high energy Heavy Ion collisions. The approximate parameterless calculation of such yield is in good agreement with recent experimental observations.
description: 27 pages, 13 figures
Nano-imaging of intersubband transitions in van der Waals quantum wells
Creators: name: Schmidt, Peter
name: Vialla, Fabien
name: Latini, Simone
name: Massicotte, Mathieu
name: Tielrooij, Klaas-Jan
name: Mastel, Stefan
name: Navickaite, Gabriele
name: Danovich, Mark
name: Ruiz-Tijerina, David A.
name: Yelgel, Celal
name: Falko, Vladimir
name: Thygesen, Kristian
name: Hillenbrand, Rainer
name: Koppens, Frank H. L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The science and applications of electronics and optoelectronics have been driven for decades by progress in growth of semiconducting heterostructures. Many applications in the infrared and terahertz frequency range exploit transitions between quantized states in semiconductor quantum wells (intersubband transitions). However, current quantum well devices are limited in functionality and versatility by diffusive interfaces and the requirement of lattice-matched growth conditions. Here, we introduce the concept of intersubband transitions in van der Waals quantum wells and report their first experimental observation. Van der Waals quantum wells are naturally formed by two-dimensional (2D) materials and hold unexplored potential to overcome the aforementioned limitations: They form atomically sharp interfaces and can easily be combined into heterostructures without lattice-matching restrictions. We employ near-field local probing to spectrally resolve and electrostatically control the intersubband absorption with unprecedented nanometer-scale spatial resolution. This work enables exploiting intersubband transitions with unmatched design freedom and individual electronic and optical control suitable for photodetectors, LEDs and lasers.
Finite Size Effects for the Ising Model Coupled to 2-D Random Surfaces
Creators: name: Dass, N. D. Hari
name: Hanlon, B. E.
name: Yukawa, T.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Finite size effects for the Ising Model coupled to two dimensional random surfaces are studied by exploiting the exact results from the 2-matrix models. The fixed area partition function is numerically calculated with arbitrary precision by developing an efficient algorithm for recursively solving the quintic equations so encountered. An analytic method for studying finite size effects is developed based on the behaviour of the free energy near its singular points. The generic form of finite size corrections so obtained are seen to be quite different from the phenomenological parameterisations used in the literature. The method of singularities is also applied to study the magnetic susceptibility. A brief discussion is presented on the implications of these results to the problem of a reliable determination of string susceptibility from numerical simulations.
description: 18 pages, 3 figures
Short-term glucose dysregulation following acute poisoning with organophosphorus insecticides but not herbicides, carbamate or pyrethroid insecticides in South Asia
Creators: name: Gifford, Robert M.
name: Chathuranga, Umesh
name: Lamb, Thomas
name: Verma, Vasundhara
name: Md Abdus Sattar
name: Thompson, Adrian
name: Siribaddana, Sisira
name: Aniruddha Ghose
name: Forbes, Shareen
name: Reynolds, Rebecca M.
name: Eddleston, Michael
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 60506 Virology

description: Background: Ingestion of organophosphorus (OP) insecticides is associated with acute hyperglycaemia. We conducted a prospective study to determine whether glucose dysregulation on admission associated with ingestion of OP insecticides or other pesticides is sustained to hospital discharge or to 3–12 months later. Methods: We recruited participants to two similar studies performed in parallel in Anuradhapura, Sri Lanka, and Chittagong, Bangladesh, following hospitalisation for OP insecticide, herbicide or other pesticide self-poisoning. Two-hour 75 g oral glucose tolerance testing (OGTT) was performed after recovery from the acute poisoning, at around the time of discharge. In Sri Lanka, a four time-point OGTT for area-under-the-curve (AUC), C-peptide and homeostatic modelling of insulin resistance (HOMA-IR) was undertaken, repeated after 1 year. In Bangladesh, a 2-h OGTT for glucose was undertaken and repeated after 3 months in participants with initial elevated 2-h glucose. We compared glucose homeostasis by poison group and adjusted findings for age, BMI and sex. Findings: Seventy-three Sri Lankan and 151 Bangladeshi participants were recruited. We observed higher mean [SD] fasting (4.91 [0.74] vs. 4.66 [0.46] mmol/L, p = .003) and 2-h glucose (7.94 [2.54] vs. 6.71 [1.90] mmol/L, p p = .352; 2-h glucose 6.96 [2.31] mmol/L vs. 6.27 [1.86] mmol/L, p = .225). Conclusion: We found in this small prospective study that acute OP insecticide poisoning caused acute glucose dysregulation that was sustained to hospital discharge but had recovered by 3–12 months. Acute glucose dysregulation was related to defects in insulin action and secretion. This study did not address long-term risk of diabetes following acute OP insecticide poisoning, but could provide the data for a power calculation for such a study
Vortex ring beams in nonlinear $\mathcal{PT}$-symmetric systems
Creators: name: Mejía-Cortés, Cristian
name: Muñoz-Muñoz, Jesús
name: Molina, Mario I.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In this paper, we investigate a two-dimensional photonic array featuring a circular shape and an alternating gain and loss pattern. Our analysis revolves around determining the presence and resilience of optical ring modes with varying vorticity values. This investigation is conducted with respect to both the array's length and the strength of the non-Hermitian parameter. For larger values of array's length, we observe a reduction in the stability domain as the non-Hermitian parameter increases. Interestingly, upon an increasing of vorticity of the optical modes full stability windows emerge for shorter lattice sizes regime.
Oral history interview with Emanon, 1981
Publisher: name: Columbia University
Year: 2020
Subjects: Drug addicts--United States
Drug abuse--History--20th century.--United States
Heroin abuse--History--20th century.--United States
Drug addicts--Rehabilitation--United States
Methadone maintenance--History--20th century.--United States
Therapeutic communities
Discrimination in the military--History--20th century.--United States

description: In this interview, Emanon discusses his life from adolescence through adulthood, with a special focus on his drug usage. He remarks on how feelings of fear and inadequacy kept him in the cycle of heroin addiction, and out of opportunities to advance in the professional world. He discusses his navigation of the racial prejudice he experienced at his job as an apprentice machinist at the Naval gun factory in Washington, DC and in the Army. He also comments on his job as a clerk in the Civil Division of the Justice Department, a job which he held for eighteen years while using heroin twice daily. He explains how he was able to conceal his addiction from his employer as well as his wife and three children. He delves into his many attempts, both independent and through formal rehabilitation programs, to break his heroin addiction using methadone. Programs included: DC General Hospital, a Veterans Administration hospital, and St. Elizabeth's Hospital. At the time of the interview, Emanon was fifity-eight years old, and sixteen months into a rehabilitation program at Daytop. He compares the therapeutic community model of Daytop to the maintenance model of methadone clinics he previously visited