gebhart/patrepeval huggingface dataset:
Fragile Intersections: Portrayals of the Latina in Hollywood (2014)

A thread which can be followed through the history of American film is the idea of the ‘other’. Despite, or perhaps because of, being such a racially and ethnically diverse nation, the dominant narratives of the United States position the non-white minority in opposition to the white majority, creating a character that is not only subjugated but defined primarily by their race or ethnicity. The Latin American ‘other’ has been imagined in the American consciousness since the colonization of the New World. The Latin American woman, as an image, has been dually constructed and ‘othered’ by Western paradigms of both race and gender.
Graphene balls for lithium rechargeable batteries with fast charging and high volumetric energy densities (2017)

Improving one property without sacrificing others is challenging for lithium-ion batteries due to the trade-off nature among key parameters. Here we report a chemical vapor deposition process to grow a graphene-silica assembly, called a graphene ball. Its hierarchical three-dimensional structure with the silicon oxide nanoparticle center allows even 1 wt% graphene ball to be uniformly coated onto a nickel-rich layered cathode via scalable Nobilta milling. The graphene-ball coating improves cycle life and fast charging capability by suppressing detrimental side reactions and providing efficient conductive pathways. The graphene ball itself also serves as an anode material with a high specific capacity of 716.2 mAh g<sup>-1</sup>. A full-cell incorporating graphene balls increases the volumetric energy density by 27.6% compared to a control cell without graphene balls, showing the possibility of achieving 800 Wh L<sup>-1</sup> in a commercial cell setting, along with a high cyclability of 78.6% capacity retention after 500 cycles at 5C and 60 °C.
Terahertz Quantum Cascade Lasers: towards high performance operation (2010)

Terahertz (THz) frequency range (wavelength of 300-30 μm, frequency of 1-10 THz and photon energy of ~4-40meV), the gap between infrared and microwave electromagnetic waves, have remained relatively unexplored for a long time, due to lack of a high power, coherent, and compact source, as well as the lack of an appropriate detector and the transmission devices. THz wave has recently received considerable attention for potential applications in non-invasive medical imaging, detecting trace of gases in the environment, sensing of organic and biological molecules, security controls, local oscillators for heterodyne receiver systems, free space communication, etc. THz quantum cascade laser (QCL), as the relatively high power and coherent THz radiation source, was demonstrated in 2002. After near a decade of intense research, THz QCLs operate only up to 186K in pulse mode with maximum power of 250 mW at 10 K.\n\nThis thesis discusses many aspects of theoretical and experimental design considerations for THz QCLs. The objective is to obtain a laser device that emits high powers and works towards the temperatures achievable by thermoelectric coolers. This work includes designing the active gain medium, and the engineering of the waveguide and heat removal structures. A density matrix based model is developed to explain the charge transport and gain mechanism in the intersubband devices, particularly for three well resonant phonon based THz QCLs. The model allows for designing of the optimum and novel active gain mediums that work at higher temperatures. The designed active gain mediums are fabricated using discussed low loss waveguide and efficient heat removal structures. The maximum operating temperatures as high as ~176 K is achieved. Finally a promising lasing scheme based on phonon-photon-phonon emissions is proposed that improves the population inversion and offers high gain peak.
Rapid determination of oxidative stability of edible oils by FTIR spectroscopy using disposable IR cards (2004)

Abstract Disposable polytetrafluoroethylene (PTFE) polymer IR (PIR) cards were used as substrates to rapidly oxidize edible oils and simultaneously monitor the extent of oxidation by FTIR spectroscopy. Four edible oils were oxidized on PIR cards and in bulk at moderate temperature (58°C), and real‐time oxidation plots were obtained by measuring changes in the IR hydroperoxide (ROOH) absorbance as a function of time. The relationship between the ROOH absorbance and PV was developed using a reference method to define absorbances corresponding to PV end points of 100 and 200 meq ROOH/kg for the oils oxidized in bulk and on cards, respectively. The real‐time oxidation plots obtained for the oils oxidized in bulk and on cards were similar in appearance, but the oils on the cards reached the PV end point 20 times faster than the oils oxidized in bulk. The results indicate that the use of disposable PIR cards coupled with moderate heating and aeration provides a simple, practical, and rapid means for monitoring oxidation and determining the oxidative stability of edible oils at a normal storage temperature.
Influence of Laser Surface Modification on Bonding Strength of Al/Mg Adhesive Joints (2011)

Key properties of magnesium alloys, such as the high strength-to-density ratio, are driving the production of lightweight structural components in the automotive and aeronautical industries. Many efforts have been carried out on various aspects of processing and fabrication, but the joining of Mg alloys to dissimilar materials is a subject which attracted much research interest in the last decades. In the present work a preliminary investigation on the strength of Al/Mg (AA6082/AZ31B) single-lap epoxy bonded joints was carried out. To this aim, Mg and Al substrates were laser irradiated using a pulsed ytterbium fiber laser. For comparison, and in order to estimate the beneficial action of the laser surface treatment, single lap joints with grit-blasted substrates were prepared and tested. The interaction between laser treated surfaces and two different epoxy adhesives was also analyzed. Finally, the results and discussion were supported by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) executed on treated and post-failure sample surfaces.
A kinetic approach to acrylamide radical polymerization by horse radish peroxidase‐mediated initiation (1999)

Free-radical polymerization of acrylamide in water at room temperature involves catalysis by horse radish peroxidase to produce radical species from hydrogen peroxide and 2,4-pentanedione through an oxidoreductive pathway. In the presence of the vinylic monomer, initiation takes place, leading to polyacrylamide formation after a long and unreproducible inhibition period. Conversion–time plots are presented, and some kinetic features are compared with results of previous studies of classical acrylamide polymerization. © 1999 Society of Chemical Industry
Circulating Succinate is Elevated in Rodent Models of Hypertension and Metabolic Disease<subtitle /> (2007)

These findings are consistent with a role of GPR91 signaling in rodent hypertension and diabetes models but not in the analogous human diseases.
Exact Non-Gaussian Interference Model for Fading Channels (2012)

This paper derives respective precise bit error probability (BEP) expressions for a two-user binary phase shift keying (BPSK) system in Rayleigh, Nakagami and Rician fading channels. Our expressions allow for different symbol rate and symbol timing asynchronism between the desired user and interfering user. We provide some theoretical results concerning the BEP performance with respect to the fading severity. Comprehensive simulation study and comparison of the BEP performance between the Gaussian and non-Gaussian interference models are also provided. The results show that the Gaussian interference model has limitation in predicting the exact BEP performance in fading channels. It fails in accurately tracking the variation of the BEP with respect to the signal-to-noise ratio (SNR), signal-to-interference ratio (SIR), symbol rate ratio and fading severity.
In vivo measurement of volumetric strain in the human brain induced by arterial pulsation and harmonic waves (2012)

Motion-sensitive phase contrast magnetic resonance imaging and magnetic resonance elastography are applied for the measurement of volumetric strain and tissue compressibility in human brain. Volumetric strain calculated by the divergence operator using a biphasic effective-medium model is related to dilatation and compression of fluid spaces during harmonic stimulation of the head or during intracranial passage of the arterial pulse wave. In six volunteers, phase contrast magnetic resonance imaging showed that the central cerebrum expands at arterial pulse wave to strain values of (2.8 ± 1.9)·10(-4). The evolution of volumetric strain agrees well with the magnitude of the harmonic divergence measured in eight volunteers by magnetic resonance elastography using external activation of 25 Hz vibration frequency. Intracranial volumetric strain was proven sensitive to venous pressure altered by abdominal muscle contraction. In eight volunteers, an increase in volumetric strain due to abdominal muscle contraction of approximately 45% was observed (P = 0.0001). The corresponding compression modulus in the range of 9.5-13.5 kPa demonstrated that the compressibility of brain tissue at 25 Hz stimulation is much higher than that of water. This pilot study provides the background for compression-sensitive magnetic resonance imaging with or without external head stimulation. Volumetric strain may be sensitive to fluid flow abnormalities or pressure imbalances between vasculature and parenchyma as seen in hydrocephalus.
Direct observation of negative phase velocity and positive group velocity in time domain for composite right/left-handed transmission lines (2006)

We use the time-domain method to directly determine the negative phase velocity and positive group velocity in the composite right/left-handed transmission line (CRLH TL). Within the frequency region of a left-handed passband, the position and time behavior of a Gaussian modulated wave form with a frequency of 1GHz is investigated, and it shows that the phase velocity and group velocity are reversed along the CRLH TL. The experimental results of the time-domain method are compared with the results derived from the dispersion relation obtained using the frequency-domain method. The experimental results of both the time-domain and frequency-domain method agree well with theoretical values.
Access control model for secure XML documents (2005)

XML (eXtensible Markup Language) is becoming the most relevant standardization effort in the area of document representation through markup languages. The existing access control has problems that an access control technique becomes complicated for each operation as a new operation is added In this paper, we present an action type of access control model. We also propose use a tree labeling algorithm for transformation processor of XML documents. What is therefore expected is higher efficiency than that of the existing assess control by managing users.
The Role of Exosomes in Breast Cancer (2015)

Although not fully elucidated, the involvement of exosomes in breast cancer development, progression, and resistance is becoming increasingly apparent from preclinical and clinical studies, with mounting interest in the potential exploitation of these vesicles for breast cancer biomarkers, as drug delivery systems, and in the development of future novel breast cancer therapies.
Efficiently tracking application interactions using lightweight virtualization (2008)

In this paper, we propose a general-purpose framework that harnesses the power of lightweight virtualization to track applications interactions in a scalable an efficient manner. Our goal is to use our framework for application auditing, intrusion detection, analysis, and system recovery from both malicious attacks and programmatic faults. In our framework, we construct each virtualized environment (VE) in a novel way that limits the scope and type of application events that need to be monitored.
MICROCOSM: An Open Hypermedia Environment for Information Integration (1992)

This report examines open hypermedia systems, and argues that such systems provide users with richer and more diverse ways to access and integrate information from large and dynamic data sets in a distributed, heterogeneous environment. In particular, the enhanced Microcosm model for open hypermedia is examined, and the ways in which it provides such an environment are discussed. The paper continues by investigating the advantages and the short comings of this model and identifies areas in which further work must be completed before such systems can become widely adopted, in particular the granularity of link anchors, editing, and version control. Possible solutions to these problems are presented and discussed. Contents 1. Introduction.............................................................................4 2. What Users Want from a System............................................5 3. Defining Open Systems ..........................................................6 4. Open H...
Human Malaria in Immunocompromised Mice: New In Vivo Model for Chemotherapy Studies (2001)

We have recently designed a new Plasmodium falciparum mouse model and documented its potential for the study of immune effector mechanisms. In order to determine its value for drug studies, we evaluated its response to existing antimalarial drugs compared to that observed in humans. Immunocompromised BXN (bg/bg xid/xid nu/nu) mice were infected with either the sensitive NF54 strain or the multiresistant T24 strain and then treated with chloroquine, quinine, mefloquine, or dihydroartemisinin. A parallelism was observed between previously reported human responses and P. falciparum-parasitized human red blood cell (huRBC)--BXN mouse responses to classical antimalarial drugs, measured in terms of speed of decrease in parasitemia and of morphological alterations of the parasites. Mice infected with the sensitive strain were successfully cured after treatment with either chloroquine or mefloquine. In contrast, mice infected with the multiresistant strain failed to be cured by chloroquine or quinine but thereafter responded to dihydroartemisinin treatment. The speed of parasite clearance and the morphological alterations induced differed for each drug and matched previously reported observations, hence stressing the relevance of the model. These data thus suggest that P. falciparum-huRBC-BXN mice can provide a valuable in vivo system and should be included in the short list of animals that can be used for the evaluation of P. falciparum responses to drugs.
Work in Progress - A Mobile Computing Collaborative Framework for Problem-Based Learning Environment (2006)

Problem-based learning (PBL) is an important and effective learning technique. The increasing speed and capacity of computing and wireless communication and the decreasing costs of hardware components has made mobile personal computing a viable platform solution to the barriers incurred in the typical PBL process. Wireless infrastructures are becoming a standardized commodity. This paper deals with the development of various design principles, and methods that emphasize the effective integration and utilization of mobile solutions to construct efficient, robust, and reusable software modules in the context of a university's learning environment in computer engineering. A mobile personal software system framework has been developed and prototyped. The system framework supports several important factors involved in a PBL environment, such as resource sharing, cross-functional teamwork, and efficient information distribution. A mixture of modern personal pocket and tablet PCs, Wi-Fi and Bluetooth technology is used for the platform
Regulation and Performance of Ghana’s Multi-tiered Rural and Microfinance Industry (2013)

The World Bank's 'Comparative Review of Microfinance Regulatory Framework Issues' concludes that 'recognizing different tiers of both regulated and unregulated institutions in a financial structure facilitates financial deepening and outreach', yet warns that 'legislation intended to promote microfinance may impose untenable supervisory burdens, while an excessively restrictive approach may constrict innovation and expansion' (Gallardo et al., 2005, p. iii). Ghana represents a regulatory framework that has evolved to permit several tiers of both regulated and unregulated institutions engaged in microfinance, sometimes facilitating new institutional forms and sometimes responding to evolution of the market. Indeed, Ghana has been an innovator since the introduction of the first African credit union in 1955 and the first rural bank in 1976. It offers a contrast to countries that have only in the last decade created regulated tiers suitable for microfinance (for example, Uganda, Kenya), sometimes severely restricting their form (West African Monetary Union, Ethiopia), or that leave regulation to apex bodies (Bangladesh, Philippines; Meagher, 2002).KeywordsCredit UnionLoan PortfolioCommunity BankMicrofinance InstitutionInternal Audit FunctionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Fractal Coding Of Subbands Using An Oriented Partition (1996)

Publication in the conference proceedings of EUSIPCO, Trieste, Italy, 1996
Refractive index determination of SiGe using reactive ion etching/ellipsometry: Application of the depth profiling of the GE concentration (1992)

The complex refractive index at a wavelength of 632.8 nm of strained epitaxial SiGe layers on silicon substrates has been determined as a function of the germanium content using in situ ellipsometry during reactive ion etching. The germanium concentration was obtained from Rutherford backscattering. These index values are used to invert the ellipsometry equations. Using this principle, the Ge concentration depth profile of an unknown SiGe structure can be determined from an in situ ellipsometry measurement sequence that is taken while the unknown sample is being etched
Intelligent controller architecture for safety systems in automatic industry (2010)

Safety, in automation industrial systems, is a new subdomain, but is receiving attention rapidly. To achieve high production efficiency and to curtail downtime in such systems, there must be appropriate intelligent mechanism in them at the architectural level. This paper presents an intelligent controller architecture that relies on the adjustable speed induction motor drives for safety systems in the automatic industry. The proposed intelligent controller architecture can greatly curtail downtime through its unique functions when detects unsafe conditions, as it reduces the speed of axes to an acceptable safe value, instead of removing the power. The proposed architecture adjusts the tradeoff between safety and efficiency and exhibits the ability to deal with a variety of abnormal signals effectively. The applicability of proposed architecture is demonstrated with a case study.
Finding Meter In Music Using An Autocorrelation Phase Matrix And Shannon Entropy. (2005)

[TODO] Add abstract here.
Decorin suppresses transforming growth factor-β-induced expression of plasminogen activator inhibitor-1 in human mesangial cells through a mechanism that involves Ca2+-dependent phosphorylation of Smad2 at serine-240 (2002)

Transforming growth factor-β (TGFβ) is a key mediator of extracellular matrix (ECM) accumulation in sclerotic kidney diseases such as diabetic nephropathy. One of the main target cells for TGFβ in the kidney are glomerular mesangial cells, which respond by increasing expression of ECM proteins, such as collagens, laminin and fibronectin, while suppressing the expression of ECM-degrading proteases and increasing the synthesis of ECM protease inhibitors, including plasminogen activator inhibitor-1. Previous studies have shown that exposure of mesangial cells to chronic high-glucose conditions, such as those seen in diabetes, increases ECM deposition in a mechanism involving glucose-mediated up-regulation of TGFβ expression. Naturally occurring inhibitors of this TGFβ-dependent fibrotic response include decorin, a small leucine-rich proteoglycan. While the mechanism by which TGFβ stimulates gene expression via the Smad signal-transduction pathway is becoming clear, the precise mechanism by which decorin may impinge upon TGFβ activity remains to be established. In this study, for the first time we provide evidence that decorin can disrupt glucose- and TGFβ/Smad-dependent transcriptional events in human mesangial cells through a mechanism that involves an increase in Ca2+ signalling, the activation of Ca2+/calmodulin-dependent protein kinase II and ensuing phosphorylation of Smad2 at Ser-240. We show that decorin also induces Ser-240 phospho-Smad hetero-oligomerization with Smad4 and the nuclear localization of this complex independently of TGFβ receptor activation. Thus, in human mesangial cells, the mechanism of decorin-mediated inhibition of TGFβ signalling may involve activation of Ca2+ signalling, the subsequent phosphorylation of Smad2 at a key regulatory site, and the sequestration of Smad4 in the nucleus.
Sensorless rotor position estimation at standstill of high speed PMSM drive with LC inverter output filter (2010)

This paper presents a new innovative method for sensorless rotor position estimation at standstill for high speed PMSM. To avoid critical thermal losses in the high speed PMSM a controlled LC filter is connected between the machine and the inverter. This additional filter leads to failure of many known methods for sensorless rotor position detection at standstill. The presented method is suitable for accurate and reliable detection of the rotor position at standstill. The function principle is based on voltage pulses applied on the LC filter and the high speed PMSM. Based on measured stator currents and voltages a special structure to model the system behavior and to calculate the actual rotor position is used. This allows a parameter insensitive operation. All theoretical proposals are proved by practical experiments.
Experimental and analytical investigation of dynamic characteristics of extension-twist-coupled composite tubular spars (1993)

The results from a study aimed at improving the dynamic and aerodynamic characteristics of composite rotor blades through the use of extension-twist coupling are presented. A set of extension-twist-coupled composite spars was manufactured with four plies of graphite-epoxy cloth prepreg. These spars were noncircular in cross-section design and were therefore subject to warping deformations. Three different cross-sectional geometries were developed: D-shape, square, and flattened ellipse. Three spars of each type were fabricated to assess the degree of repeatability in the manufacturing process of extension-twist-coupled structures. Results from free-free vibration tests of the spars were compared with results from normal modes and frequency analyses of companion shell-finite-element models. Five global modes were identified within the frequency range from 0 to 2000 Hz for each spar. The experimental results for only one D-shape spar could be determined, however, and agreed within 13.8 percent of the analytical results. Frequencies corresponding to the five global modes for the three square spars agreed within 9.5, 11.6, and 8.5 percent of the respective analytical results and for the three elliptical spars agreed within 4.9, 7.7, and 9.6 percent of the respective analytical results.
Querying complex structured databases (2007)

Correctly generating a structured query (e.g., an XQuery or a SQL query) requires the user to have a full understanding of the database schema, which can be a daunting task. Alternative query models have been proposed to give users the ability to query the database without schema knowledge.