gebhart/patrepeval huggingface dataset:
A new decomposition scheme for three-dimensional contours based on curvature and torsion (1986)

This paper presents a new scheme for segmentation of three-dimensional (3D) contours based on a criterion involving their curvature and torsion properties. Curvature indicates how sharply a curve is turning while torsion measures the extent of its twist in 3D space. Also, curvature and torsion completely define a curve in 3D space. For these reasons, the two together have been chosen here as a set of intrinsic and complete structural features of a contour. The Darboux vector Ω contains both these features as its components. We use the length ∥Ω∥ of the Darboux vector, also known as total curvature, as the criterion for segmentation of the contour. Specifically we choose the zero-crossings of d <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ∥Ω∥/ds <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , where s = arc length, as the breakpoints in the segmentation of the contour. The segmentation scheme is described by means of a block diagram which includes filters for calculation of d <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ∥Ω∥/ds <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> in terms of appropriate distributional derivatives resulting from the contour parametric equations.
MPC on manifolds with applications to the control of systems on matrix Lie groups. (2015)

This paper presents a model predictive control scheme for systems with discrete-time dynamics evolving on configuration spaces that are smooth manifolds. The scheme exhibits similar properties to that of ordinary model predictive control applied to dynamics evolving on R^n. It also exhibits global asymptotic stability properties even in the case when there does not exist a globally stabilizing, continuous control law, implying that the model predictive control law is discontinuous. 
We also demonstrate that there do not exist globally stabilizing, continuous control laws for manifolds with Euler characteristic equal to 1. In particular, the case of matrix Lie groups is considered, which are manifolds whose Euler characteristic is equal to 0. An application to spacecraft attitude control is also considered in the paper, in which spacecraft attitude evolves on the matrix Lie group SO(3). Two simulation results are reported. The first demonstrates that the scheme is able to enforce constraints. The second simulation considers the unconstrained case in order to test properties relating to global stability and it is shown that the stabilizing model predictive control law is discontinuous.
Does Structured Postgraduate Training Affect the Learning Curve in Direct Anterior Total Hip Arthroplasty? A Single Surgeon’s First 200 Cases (2021)

When compared with the existing literature, incorporation of DAA into fellowship training can lead to reduction in fractures and reoperation rates.
Quantum Dot Made in Metal Oxide Silicon-Nanowire Field Effect Transistor Working at Room Temperature. (2015)

We report the observation of an atomic like behavior from T = 4.2 K up to room temperature in n- and p-type Ω-gate silicon nanowire (NW) transistors. For that purpose, we modified the design of a NW transistor and introduced long spacers between the source/drain and the channel in order to separate the channel from the electrodes. The channel was made extremely small (3.4 nm in diameter with 10 nm gate length) with a thick gate oxide (7 nm) in order to enhance the Coulomb repulsion between carriers, which can be as large as 200 meV when surface roughness promotes charge confinement. Parasitic stochastic Coulomb blockade effect can be eliminated in our devices by choosing proper control voltages. Moreover, the quantum dot can be tuned so that the resonant current at T = 4.2 K exceeds that at room temperature.
Marked elevation of the serum ferritin is highly specific for disseminated histoplasmosis in AIDS (1995)

Kirn, D. H.; Fredericks, D.; McCutchan, J. A.; Stiles, D.; Shuman, M. Author Information
Sustainable and Affordable Composites Built Using Microstructures Performing Better than Nanostructures for Arsenic Removal (2018)

Arsenicosis was recognized over 104 years ago. Elevated arsenic (As) concentrations in water is faced by about 200 million people worldwide and has become one of the biggest challenges in the context of water purification. Providing sustainable and affordable solutions to tackle this menace is a need of the hour. Adsorption on advanced materials is increasingly being recognized as a potential solution. Here, we report various functionalized microcellulose-reinforced 2-line ferrihydrite composites which show outstanding As(III) and As(V) adsorption capacities. Green synthesis of the composite yields granular media with high mechanical strength which show faster adsorption kinetics in a wide pH range, irrespective of the presence of other interfering ions in water. The composites and their interaction with As(III) and As(V) were studied by XRD, HRTEM, SEM, XPS, Raman, TG, and IR spectroscopy. Performance of the media in the form of cartridge reaffirms its utility for point-of-use water purification. We show that cellulose microstructures are more efficient than corresponding nanostructures for the purpose of arsenic remediation. We have also performed an evaluation of several sustainability metrics to understand the “greenness” of the composite and its manufacturing process.
Streaming applications over HSDPA in mixed service scenarios (2005)

High-speed downlink packet access (HSDPA) is included in release 5 of the WCDMA specifications to increase downlink capacity and bitrates. This paper considers performance aspects of streaming applications over HSDPA in a mixed streaming and best-effort service scenario. Different scheduling algorithms are evaluated with the aim of providing sufficient quality-of-service for streaming. The simulation results show that reasonable streaming performance can be achieved without service differentiation if a somewhat fair scheduler is used, and that a streaming-aware scheduler further can protect streaming quality-of-service in high load conditions.
Zinc: A Necessary Ion for Mammalian Sperm Fertilization Competency (2018)

The importance of zinc for male fertility only emerged recently, propelled in part by consumer interest in nutritional supplements containing ionic trace minerals. Here, we review the properties, biological roles and cellular mechanisms that are relevant to zinc function in the male reproductive system, survey available peer-reviewed data on nutritional zinc supplementation for fertility improvement in livestock animals and infertility therapy in men, and discuss recently discovered signaling pathways involving zinc in sperm maturation and fertilization. Emphasis is on the zinc-interacting sperm proteome and its involvement in the regulation of sperm structure and function, from spermatogenesis and epididymal sperm maturation to sperm interactions with the female reproductive tract, capacitation, fertilization and embryo development. Merits of dietary zinc supplementation and zinc inclusion into semen processing media are considered with livestock artificial insemination (AI) and human assisted reproductive therapy (ART) in mind. Collectively, the currently available data underline the importance of zinc ions for male fertility, which could be harnessed to improve human reproductive health and reproductive efficiency in agriculturally important livestock species. Further research will advance the field of sperm and fertilization biology, provide new research tools, and ultimately optimize semen processing procedures for human infertility therapy and livestock AI.&amp;nbsp;
Vacancy-oxygen complexes and their optical properties in AlN epitaxial films studied by positron annihilation (2009)

Vacancy-type defects in AlN grown by metal-organic vapor phase epitaxy (MOVPE) and lateral epitaxial overgrowth (LEO) using halide vapor phase epitaxy were probed by a monoenergetic positron beam. Doppler broadening spectra of the annihilation radiation were measured and compared to the spectra calculated using the projector augmented-wave method. For MOVPE-AlN, the concentration of vacancy-type defects was high near the interface between AlN and the GaN buffer layer, and the defect-rich region expanded from the interface toward the surface when the NH3 flow rate increased. For the sample grown on the AlN buffer layer, however, the introduction of such defects was suppressed. For LEO-AlN, distinct deep emission peaks at 3–6 eV were observed in cathodoluminescence spectra. From a comparison between Doppler broadening spectra measured for LEO-AlN and computer simulated ones, an origin of the peaks was identified as complexes of Al vacancy (VAl) and oxygen atoms substituting nitrogen sites such as VAl(ON)n (n=3 and 4).
Green thin polymer film metallization using supercritical carbon dioxide (2007)

It is shown that low-density polymer layers created by supercritical carbon dioxide (scCO2) processing can be exploited to enhance metallization of thin polymer films. Spun-cast thin films were exposed to scCO2 within the narrow temperature and pressure regime known as the `density fluctuation ridge', where excess swelling of the polymer thin films was induced, and the swollen structures could be subsequently preserved by quick evaporation of CO2. X-ray reflectivity (XR) measurements proved that the `expanded' films had a broader interfacial width between the polymer and deposited metal layers, regardless of the polymer film thickness or choice of polymers. Furthermore, standard peel test showed a drastic enhancement in adhesion between the polymer and metal layers, which correlates with the XR result: the broader interfacial width indicates increased adhesion.
Recombineering with overlapping single-stranded DNA oligonucleotides: Testing a recombination intermediate (2003)

A phage lambda-based recombination system, Red, can be used for high-efficiency mutagenesis, repair, and engineering of chromosomal or episomal DNA in vivo in Escherichia coli. When long linear double-stranded DNA with short flanking homologies to their targets are used for the recombination, the lambda Exo, Beta, and Gam proteins are required. The current model is: (i) Gam inhibits the host RecBCD activity, thereby protecting the DNA substrate for recombination; (ii) Exo degrades from each DNA end in a 5' --> 3' direction, creating double-stranded DNA with 3' single-stranded DNA tails; and (iii) Beta binds these 3' overhangs to protect and anneal them to complementary sequences. We have tested this model for Red recombination by using electroporation to introduce overlapping, complementary oligonucleotides that when annealed in vivo approximate the recombination intermediate that Exo should create. Using this technique we found Exo-independent recombination. Surprisingly, a similarly constructed substrate with 5' overhangs recombined more efficiently. This 5' overhang recombination required both Exo and Beta for high levels of recombination and the two oligonucleotides need to overlap by only 6 bp on their 3' ends. Results indicate that Exo may load Beta onto the 3' overhang it produces. In addition, multiple overlapping oligonucleotides were successfully used to generate recombinants in vivo, a technique that could prove useful for many genetic engineering procedures.
Design and Fabrication of Luneburg-Type Waveguide Lenses. (1989)

Thesis (Ph.D.)--University of Rochester. College of Engineering and Applied Science. Institute of Optics, 1989.
An Interactive Out-of-Core Rendering Framework for Visualizing Massively Complex Models (2004)

With the tremendous advances in both hardware capabilities and rendering algorithms, rendering performance is steadily increasing. Even consumer graphics hardware can render many million triangles per second. However, scene complexity seems to be rising even faster than rendering performance, with no end to even more complex models in sight. In this paper, we are targeting the interactive visualization of the "Boeing 777" model, a highly complex model of 350 million individual triangles, which - due to its sheer size and complex internal structure - simply cannot be handled satisfactorily by today's techniques. To render this model, we use a combination of real-time ray tracing, a low-level out of core caching and demand loading strategy, and a hierarchical, hybrid volumetric/lightfield-like approximation scheme for representing not-yet-loaded geometry. With this approach, we are able to render the full 777 model at several frames per second even on a single commodity desktop PC.
Charge transfer dynamics and interlayer exciton formation in MoS2/VOPc mixed dimensional heterojunction (2022)

Mixed-dimensional van der Waals heterojunctions involve interfacing materials with different dimensionalities, such as a 2D transition metal dichalcogenide and a 0D organic semiconductor. These heterojunctions have shown unique interfacial properties not found in either individual component. Here, we use femtosecond transient absorption to reveal photoinduced charge transfer and interlayer exciton formation in a mixed-dimensional type-II heterojunction between monolayer MoS<sub>2</sub> and vanadyl phthalocyanine (VOPc). Selective excitation of the MoS<sub>2</sub> exciton leads to hole transfer from the MoS<sub>2</sub> valence band to VOPc highest occupied molecular orbit in ∼710 fs. On the contrary, selective photoexcitation of the VOPc layer leads to instantaneous electron transfer from its excited state to the conduction band of MoS<sub>2</sub> in less than 100 fs. This light-initiated ultrafast separation of electrons and holes across the heterojunction interface leads to the formation of an interlayer exciton. These interlayer excitons formed across the interface lead to longer-lived charge-separated states of up to 2.5 ns, longer than in each individual layer of this heterojunction. Thus, the longer charge-separated state along with ultrafast charge transfer times provide promising results for photovoltaic and optoelectronic device applications.
Development of Retargeted CD38-Specific NK-92 Cell Line for Potential Anti-Myeloma Immunotherapy. (2005)

Abstract Multiple Myeloma (MM) is a B cell neoplasm in which malignant plasma cells accumulate in the bone marrow and produce excessive amounts of a monoclonal immunoglobulin. Among the large number of antigens expressed by plasma cells, CD38 is one of the highest expressed surface molecules, suggesting an alternative public tumour target. For instance, the myeloma cell line 8226 has a high surface expression of CD38. We plan to introduce genetically recombinant single-chain variable fragments (scFv) of anti-CD38 antibody, along with CD3 chain, into NK-92 a natural killer cell line which is highly cytotoxic against a variety of malignant cells (the only natural killer cell line being used in phase I/II clinical trials). It is likely that the retargeted NK-92 cells may specifically and efficiently kill CD38-expressing myeloma cells. By using a series of degenerate primer sets for mouse immunoglobulin variable region genes, VH and VL regions were isolated through reverse transcription PCR from OKT10 cell line. Further sequencing analysis provided novel information of the OKT10 immunoglobulin heavy and light chains. A PCR-based assembling strategy was employed to construct the scFv with FLAG sequence integrated as a tag. VH and VL domains were joined together with a hinge region of (Gly4Ser)3. The phagemid construct has been formed by subcloning the scFv fragment into the Sfi I/Not I cloning sites of the expression vector pHEN2, and subsequently transformed into the E. Coli HB2151. Five out of 7 transformed bacterial colonies screened did not contain the scFv fragment. For the remaining two clones with the correct-sized insert, we tested the specificity of the scFv fragments that were prepared through intracellular antibody capture as periplasmic proteins. We performed a competitive flow assay using periplasmic proteins with commercially available anti-CD38 PE conjugated antibodies on 8226 myeloma cell line. We found that one of these two clones (clone 6) showed a reduction in CD38 staining and presented as double peaks; while this pattern was not seen in the clone 7. Subsequent DNA sequencing revealed that there was a 100-bp truncation in the heavy chain region in clone 7; while the clone 6 has a complete productive heavy chain and light chain spanned by the linker region. We are going to transfect NK-92 cells with retrovial vector pL-scFv(clone 6) construct as the basis of an efficient approach for anti-myelome immunotherapy. (Dr. Daniel Sze is supported by the International Myeloma Foundation Senior Research Grant).
Serum Complement in Acute Bronchiolitis (1970)

The levels of total complement and β1C/1A-globulin were tested in 20 infants with acute bronchiolitis and in 7 infants without respiratory tract disease. The level of total complement or complement component β1C was not depressed in the acute phase of acute bronchiolitis whether RS virus-associated or not. This does not negate the possibility of an immunological pathogenesis of RS virus disease.
Progress in polarization ray tracing (1994)

Polarization ray tracing is a collection of methods that extend geometrical ray tracing allowing the calculation of the evolution of polarization states along ray paths and the determination of the intrinsic polarization properties, such as diattenuation and retardance, associated with ray paths. This paper compares the suitability of the Jones, Mueller, and 3D polarization ray tracing calculi, examining the issues of local vs. global coordinates, amplitude vs. phase representations, inclusion of the wavefront aberration function, partially polarized light, measurements of images by polarimeters, and diffraction image formation by low and high numerical aperture beams.
Experimental Validation of a Hierarchical Suspension Control via MR Damper (2020)

The suspension system has an important impact on vehicle dynamics, comfort and stability; these aspects are conflicting and the objective of an automatic control is to find a compromise. In this paper, the authors present an approach for the control of the vertical dynamics consisting of two layers: a low-level controller which fully exploits the properties of the magneto-rheological damper technology, and a high-level controller based upon a linearized skyhook for the full body control. The controller is experimentally validated on an actual vehicle in two road scenarios, which differ in their frequency excitation.
SPECTRAL DIFFERENCE IN COMMERCIAL $sup 125$I PHOTON SOURCES. (1971)

Several factors may alter the attenuation properties and the :.0.27.--0C apparent spectral composition of the I-125 photon sources used in 93 1835 .fi.theabsorptiometric determination of bone mineral content (BMC)..OU,Dt--40 -Me '31'2 Some of the more important attenuation and spectral altering factors -2.cooftc E'E : AN #2:.M.E ' are the presence of a radionuclide contaminant, induced fluorescence 0•0 0 C =-= -U .. em::.
ESD characterization of atomically-thin graphene (2012)

A first-time study of ESD characterization of atomically-thin graphene is reported. In a material comprising only a few atomic layers, It2 reaches 4 mA/μm for 100 ns and ∼8 mA/μm for 10 ns TLP or an equivalent current density of 2−3×108 A/cm2 and 4.6×108 A/cm2, respectively. The fact that failure occurs within the graphene and not at the contacts indicates that intrinsic properties of this new material can be appropriately characterized by using short-pulse stressing. Moreover, unique gate biasing effects are observed that can be exploited for novel applications including robust ESD protection designs for advanced semiconductor products.
Proton sharing and transfer in some zwitterionic compounds based on 4-oxo-4-((1-phenethylpiperidin-4-yl)(phenyl)amino)alcanoic acids (2010)

Three compounds, each derived from Fentanyl and differing essentially only in the length of a carboxylic acid chain, were synthesized and yielded four crystal structures three of which share several structural similarities, including the length of the chain, while the fourth, with a shorter chain, is quite different. The chain length has a significant influence on the crystal structures formed. The 'three atom' chain compounds are all solvated zwitterions which feature a hydrogen-bonded 'dimer' between adjacent zwitterions. The formation of this large dimer leaves available a second carboxylate O atom to take part in hydrogen bonding interactions with solvent molecules. The shorter 'two atom' chain compound was difficult to crystallize and required the use of synchrotron radiation to measure X-ray diffraction data. It does not form the same dimer motif observed in the 'three atom' chain compounds and has not formally formed a zwitterion; although there is evidence of proton sharing or disorder X-ray data are insufficient to create a disordered model, and the compound was modeled as formally neutral based on O-H and N-H distances. Room temperature analyses showed the proton transfer behavior to be independent of crystal temperature, and nuclear magnetic resonance studies show proton transfer behavior in solution. The formation of a zwitterionic hydrogen-bonded dimer is implicated in providing some stability during crystal growth of the easily crystallized 'three atom' chain compounds.
AUTOLOGOUS CELL TRANSPLANTATION FOR UROLOGIC RECONSTRUCTION (1998)

No AccessJournal of UrologyClinical Urology: This Month in Investigative Urology1 Jan 1998AUTOLOGOUS CELL TRANSPLANTATION FOR UROLOGIC RECONSTRUCTION Anthony AtalaMD Anthony AtalaAnthony Atala More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(01)63994-6AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail "AUTOLOGOUS CELL TRANSPLANTATION FOR UROLOGIC RECONSTRUCTION." The Journal of Urology, 159(1), pp. 2–3 References 1 Yoo, J. J., Oberpenning, F. and Atala, A.: Bladder augmentation using allogenic bladder submucosa seeded with cells. Urology, in press, 1997. Google Scholar 2 : Formation of urothelial structures in vivo from dissociated cells attached to biodegradable polymer scaffolds in vitro.. J. Urol.1992; 148: 658. Link, Google Scholar 3 : A novel gene delivery system using urothelial tissue engineered neo-organs.. J. Urol.1997; 158: 1066. Link, Google Scholar Department of Urology; Children's Hospital and Harvard Medical School; Boston, Massachusetts© 1998FiguresReferencesRelatedDetailsCited bySCHOELLER T, LILLE S, STENZL A, NINKOVIĆ M, PIZA H, OTTO A, RUSSELL R and WECHSELBERGER G (2018) BLADDER RECONSTRUCTION USING A PREVASCULARIZED CAPSULAR TISSUE SEEDED WITH UROTHELIAL CELLSJournal of Urology, VOL. 165, NO. 3, (980-985), Online publication date: 1-Mar-2001.REDDY P, BARRIERAS D, WILSON G, BÄGLI D, McLORIE G, KHOURY A and MERGUERIAN P (2018) REGENERATION OF FUNCTIONAL BLADDER SUBSTITUTES USING LARGE SEGMENT ACELLULAR MATRIX ALLOGRAFTS IN A PORCINE MODELJournal of Urology, VOL. 164, NO. 3 Part 2, (936-941), Online publication date: 1-Sep-2000. Volume 159Issue 1January 1998Page: 2-3 Advertisement Copyright & Permissions© 1998MetricsAuthor Information Anthony Atala More articles by this author Expand All Advertisement PDF downloadLoading ...