gebhart/patrepeval huggingface dataset:
Evidence for modulation rate specific adaptation in the frequency following response? (2013)

We used an adaptation paradigm to investigate whether the frequency following response (FFR) would show evidence for neurons tuned to modulation rate in humans, as has been previously shown in the inferior colliculus of the macaque using fMRI [Baumann et al., Nat. Neurosci. 14, 423-425 (2011)]. The FFR to a 100-ms, 75-dB SPL, target complex tone with an envelope rate of 213 Hz was measured for ten subjects. The target was preceded by a 200-ms, 75-dB SPL, adaptor complex with an envelope rate of 90, 213 or 504 Hz. All complexes contained alternating-phase harmonics from approximately 3.9 to 5.4 kHz. A "vertical" montage (+ Fz, - C7, ground = mid-forehead) was used, for which the FFR is assumed to reflect phase-locked neural activity from generators in the rostral brainstem. The results showed significant adaptation effects in the spectral magnitude of the 213-Hz envelope-related component of the FFR. However, the identical-rate adaptor did not generally produce more adaptation than the different-rate adaptors. Hence, the present results do not provide evidence for neurons tuned to modulation rate in the human brainstem [supported by Wellcome Trust Grant 088263].
Spectrally Efficient Cooperative Diversity Protocols Forwireless Networks (2006)

We design and analyze spectrally efficient cooperative diversity protocols using multiple relays (say N), which combat the multi-path fading by retransmitting the bit-interleaved coded information transmitted by a source to destination. In the first proposed protocol, called N-relay cyclic protocol, each relay will transmit only a portion of the signal transmitted by the source. In the second protocol, only the relay with the best mutual information will transmit all the source information-thus termed as best-relay protocol. We derive the probability density functions of the mutual information for both of these protocols and using these densities, we analyze the outage probability and outage capacity performances. The results show that the proposed protocols achieve the maximum diversity order N + 1.
Band-Specific Shearlet-Based Hyperspectral Image Noise Reduction (2015)

Hyperspectral images (HSIs) can be very noisy, and the amount of noise may differ from band to band. While some spectral bands may be dominated by low signal-independent noise levels, others have mixed noise levels, which may include high levels of Gaussian, Poisson, and Spike noises. When a denoising algorithm is globally applied to the whole data set, it usually affects the low-noise bands adversely. Therefore, it is better to use different criteria for denoising different bands. In this paper, we propose a new denoising strategy to do so. The method is based on a 2-D nonsubsampled shearlet transform, applied to each spectral band of the HSI. We propose an effective method to distinguish between bands with low levels of Gaussian noise (LGN bands) and bands with mixed noise (MN bands) based on spectral correlation. LGN bands are denoised using a thresholding technique on the shearlet coefficients. On the MN bands, a local noise reduction method is applied, in which the detail shearlet coefficients of adjacent LGN bands are employed. This targeted approach is prone to reduce spectral distortions during denoising compared with global denoising methods. This advantage is shown in experiments where the proposed method is compared with state-of-the-art denoising methods on synthetic and real hyperspectral data sets. To assess the effect of denoising, classification and spectral unmixing tasks are applied to the denoised data. Obtained results show the superiority of the proposed approach.
ChemInform Abstract: A Novel and Facile Synthesis of 1,3,2‐λ5‐Dioxaphospholanes. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Carbon-silica dual-phase filler, a new-generation reinforcing agent for rubber. Part VI. Time-temperature superposition of dynamic properties of carbon-silica-dual-phase-filler-filled vulcanizates (2000)

Dynamic properties such as shear modulus, loss modulus, and loss factor were obtained at a low strain amplitude over a wide range of frequencies and temperatures on vulcanizates filled with carbon black, silica, and carbon–silica dual-phase filler. The data were shifted along the frequency scale. Instead of a single smooth master curve, a pseudomaster curve with a feather-like structure is obtained. This effect is especially pronounced for the loss factor. Multiple factors may be responsible for this. Among others, filler networking and polymer–filler interaction may play a dominant role. The effect of the carbon–silica dual-phase filler on the overall dynamic properties of the vulcanizates is similar to that of silica. Their tan δ values are much lower at lower frequencies and are relatively higher at higher frequencies. © 2000 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 38: 1240–1249, 2000
The structure of a fibril‐forming sequence, NNQQNY, in the context of a globular fold (2008)

Numerous human disorders are associated with the formation of protein fibrils. The fibril-forming capacity of a protein has been found in recent studies to be determined by a short segment of residues that forms a dual beta-sheet, called a steric zipper, in the spine of the fibril. The question arises as to whether a fibril-forming segment, when inserted within the sequence of a globular protein, will invariably cause the protein to form fibrils. Here we investigate this question by inserting the known fibril-forming segment NNQQNY into the globular enzyme, T7 endonuclease I. From earlier studies, we know that in its fibril form, NNQQNY is in an extended conformation. We first found that the inserted NNQQNY stimulates fibril formation of T7 endonuclease I in solution. Thus NNQQNY within T7 endonuclease I can exist in an extended conformation, capable of forming the steric zipper in the core of a fibril. We also found that T7 endonuclease I folds into a decamer that does not form fibrils. We determined the structure of the decamer by X-ray crystallography, finding an unusual oligomer without point group symmetry, and finding that the NNQQNY segments within the decamer adopt two twisted conformations, neither is apparently able to fibrillize. We conclude that twisting of fibril forming sequences from the fully extended conformation, imposed by the context of their placement in proteins, can interfere with fibril formation.
Finite element study on random design of 2-2 composite transducer (2002)

Random 2-2 composite transducers are studied using FEM(ANSYS). Admittance curves as well as beam patterns in the near field are calculated and are used to evaluate the performance of random 2-2 composite designs. First, the pressure and the normal velocity distributions at the interface of water and transducer are calculated using ANSYS, then, these pressure and velocity are used to calculate the beam pattern using Helmholtz integral. Different random configurations are studied and the results are discussed.
Characteristics of murine C‐type viruses. IV. The virus produced by ehrlich tumor cells and its hybrids with mouse L cells (1974)

Abstract The infectious properties of viruses produced by Ehrlich tumor cells (E), the A9 subline of mouse L cells (L), their hybrids (EL 0 and EL) and high‐malignant sublines of the low‐malignant hybrid line (EL m ) were investigated. The infectivity assays were antigen induction on JLS‐V9 cells, antigenic conversion and focus induction on S + L ‐ cells (D56 subline) and focus formation on BALB/3T3 cells. The E and L viruses, produced by the parental cells, were detected in the JLS‐V9 test but were distinguished in S + L ‐ and BALB/3T3 cells. The L virus was focus‐positive, the E virus focus‐negative (BALB/3T3). For antigenic conversion, the L virus was negative and the E virus positive (D56). The hybrid cell line, tested on several occasions after the hydridization event, produced viruses with characteristics similar to both E and L viruses, regardless of the complete or reduced chromosome numbers. The malignant sublines selected from the hybrid showed preferential loss of the A9 parent‐derived biarmed chromosomes. One of these lines produced virus (EL m ) with infective properties similar to those of the E virus. This suggests that the virus produced by a particular cell line is determined by the cell genome. Another malignant subline was found to be negative for production of infectious virus in all three indicator systems.
Partial synthetic aperture beamformer (2011)

Synthetic Aperture Sonar (SAS) was developed as a means to produce long apertures that can create images at high resolution, usually achieved by collecting data on a platform with a predictable trajectory However, Autonomous Underwater Vehicle (AUV) technology has matured and now includes operational conditions where system trajectory is not predictable (e.g. autonomous redirection behavior). Partial aperture SAS (PSAS) can be used to provide image data for autonomous behaviors with relatively low data latency and can be used to minimize the effects of non-linear trajectories on SAS image production by providing imagery with minimal latency, but at lower resolution compared to full aperture imagery. This paper explores a technique that uses a range invariant aperture to form SAS images to provide the highest achievable resolution given a specified maximum aperture length (or data latency). A simulation is used to measure the effect of the range-invariant aperture on resolution and results are compared with theoretical values. PSAS techniques are also used to produce imagery from an existing SAS system, and imagery produced at various aperture lengths is compared. Results show that the effects of PSAS on image quality and resolution are predictable. Therefore, future efforts to develop image queued autonomous behaviors can trade data latency and image resolution to optimize system performance.
Electroforming and switching effects in yttrium oxide (2004)

Electroforming and switching in sandwich structures based on anodic films of yttrium oxide have been studied. After being electroformed, the structures exhibit voltage-controlled negative differential resistance with N-shaped I–V characteristics. Typical values of the threshold current and voltage are Ith ∼ 10–30 μA and Vth ∼ 0.5–1.5 V for a film thickness d ∼ 100 nm. The switching channels, consisting of non-stoichiometric Y2O3−x, are formed in the initial oxide films during the preliminary electroforming. A possible switching mechanism associated with the non-equilibrium metal–insulator transition is discussed. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
A metal plasma source ion implantation and deposition system (1999)

This article presents a metal plasma source ion implantation and deposition system, which is a qualitative extension of plasma source ion implantation by combining pulsed metal plasma and steady-state gas plasma. The pulsed metal plasma is produced by pulsed cathodic arc discharge and the steady-state gas plasma by magnetic multipole filament discharge. The existence of gas plasma greatly facilitates the breakdown of the pulsed cathodic arc plasma source, which does not need the conventional trigger system. Some operation characteristics of this system were measured. It was shown that the cathodic arc plasma parameters depend strongly on gas pressure. 0.45% C steel was modified in nitrogen plasma and pulsed aluminum plasma. The corrosion resistance ability of the treated 0.45% C steel sample was increased by about 30 times over that of the untreated sample. AlN/Al2O3/Al composite film was deposited on 0.45% C steel using a glow-arc technique.
Nanoimprint - a green technology (2019)

INTRODUCTION\nMicro technology has many applications within the cleantech area. Well known examples\nare micro fabricated solar cells relying on silicon substrates and fabrication technologies.\nSuch systems have been in use for many years and currently the number of systems in use\nin Denmark is increasing rapidly.\nHowever, micro and nano technology can help overcome the future challenges in many\nother different ways. Sensing systems can increase the output of wind turbines and sensors\nof different kinds can help to save energy. Small Lab-on a chip devices can perform\nenvironmental analysis and detect pesticides. Other applications are energy harvesting from\nvibrations, which can provide energy to embedded sensing systems that can help save\nenergy or monitor for example the conditions of wind turbines.\nTOPICS ADDRESSED\nThis project is the collected effort from four courses at DTU Nanotech:\n- 33471 Nano-3W: Experimental Micro- and Nanotechnology\n- 33470 Mikro-3W: Experimental Semiconductor Technology\n- 33435 LabChip-3W: Experimental Work on Lab-on-a-chip Systems\n- 33422 Nanolithography\nThe topics addressed are:\n- Carbon nanotube based system for environmental analysis\n- Lab-on a chip device for pesticide detection using gold nanoparticles\n- Inorganic electrets for energy harvesting devices\n- Application of Colloidal Lithography for Micro-/Nano Surface Structuring\n- Use of electron beam and nanoimprint lithography for cleantech\nRESULTS\nAs the projects will be carried out in June 2012 the results cannot be presented yet.\nHowever, the results will demonstrate how useful and versatile micro and nanotechnology is.
Ist das Bleomycin Tiermodell der Lungenfibrose zur Findung neuer Therapieoptionen geeignet? (2007)

Bleomycin (BL) wird häufig zur Induktion einer experimentellen Lungenfibrose im Tiermodell benutzt. In diesem Modell wurden zahlreiche Substanzen mit antifibrotischer Wirkung gefunden, jedoch zeigten sie in Patientenstudien keinen Benefit. Der Zweck unserer Untersuchung war es, alle Publikationen über den erfolgreichen Einsatz von antifibrotischen Substanzen im BL Tiermodell zu finden und den Nutzen dieses Modells für die Klinik zu evaluieren.
Holographic 4x4 star coupler fabricated in silver-halide sensitized gelatin (1994)

We demonstrate 4 X 4 holographic star-couplers fabricated at He-Ne laser light in Silver- Halide Sensitized Gelatin derived from Agfa-Gevaert plates. A modified processing formula is discussed. Two approaches are tested: multiple-beam in a planar configuration and multiple- exposure in a 3D arrangement. Some discussions and experimental results are presented.
ChemInform Abstract: A CONVENIENT SYNTHESIS OF AMPICILLIN SULFOXIDE AND 6‐AMINOPENICILLANIC ACID SULFOXIDE (1976)

Abstract 6‐Aminopenicillansäure (Ia) und Ampicillin (Ib) werden mit Peressigsäure (II) in Gegenwart von p‐Toluolsulfonsäure zu Sulfoxid‐tosylaten (III) oxidiert, aus denen die freien Sulfoxide (IV) durch Umsetzung mit Triäthylamin erhalten werden.
Characterization of a granule-independent lytic mechanism used by CTL hybridomas. (1994)

The mechanism(s) by which CTL induce target cell lysis have not been clearly elucidated. Perforin and the cytotoxic cell proteinases (granzymes) contained within the granules of CTL and NK, have been implicated, but abundant evidence for the existence of alternate lytic pathways has accumulated. In this report we characterize the mechanism of killing used by two cytolytic hybridomas (PMM-1 and MD90) that express neither perforin nor the granzymes. These characteristics are compared with results obtained by using a representative Ag-dependent, granule-containing T cell clone in cytolysis assays. The major differences were that the granule-negative hybridomas could lyse a variety of target cells in the presence of cyclosporin and the absence of calcium. All the effectors could kill in the presence of protein synthesis inhibitors (cycloheximide and emetine) and induced DNA fragmentation in the target cells. The cytolytic hybridomas had to be stimulated to be cytolytic and this activation required the presence of calcium, was dependent on protein synthesis, and inhibited by the addition of cyclosporin. Although TNF was shown not be involved, the sensitivity of the target cells to lysis by the granule-negative killers correlated with the level of expression of Fas Ag. With the use of L1210 and an L1210 cell line transfected with Fas cDNA we demonstrated that these MD90 and PMM-1 kill the latter much more effectively and that this increase was effectively inhibited with anti-Fas Ab. Furthermore the lack of sensitivity to cyclosporin, cycloheximide, emetine, and EGTA was confirmed with these targets. We conclude that these two cytolytic hybridomas use the Fas lytic pathway to induce lysis in target cells.
X-ray photoelectron spectroscopy of alkylaminesilanes bound to metal oxide electrodes (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopy of alkylaminesilanes bound to metal oxide electrodesP. R. Moses, Larry M. Wier, John C. Lennox, H. O. Finklea, J. R. Lenhard, and Royce W. MurrayCite this: Anal. Chem. 1978, 50, 4, 576–585Publication Date (Print):April 1, 1978Publication History Published online1 May 2002Published inissue 1 April 1978https://pubs.acs.org/doi/10.1021/ac50026a010https://doi.org/10.1021/ac50026a010research-articleACS PublicationsRequest reuse permissionsArticle Views704Altmetric-Citations210LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Full Body Virtual Autopsies using a State-of-the-art Volume Rendering Pipeline (2006)

This paper presents a procedure for virtual autopsies based on interactive 3D visualizations of large scale, high resolution data from CT-scans of human cadavers. The procedure is described using examples from forensic medicine and the added value and future potential of virtual autopsies is shown from a medical and forensic perspective. Based on the technical demands of the procedure state-of-the-art volume rendering techniques are applied and refined to enable real-time, full body virtual autopsies involving gigabyte sized data on standard GPUs. The techniques applied include transfer function based data reduction using level-of-detail selection and multi-resolution rendering techniques. The paper also describes a data management component for large, out-of-core data sets and an extension to the GPU-based raycaster for efficient dual TF rendering. Detailed benchmarks of the pipeline are presented using data sets from forensic cases.
Correction: Connective Tissue Growth Factor Overexpression in Cardiomyocytes Promotes Cardiac Hypertrophy and Protection against Pressure Overload (2009)

Connective tissue growth factor (CTGF) is a secreted protein that is strongly induced in human and experimental heart failure. CTGF is said to be profibrotic; however, the precise function of CTGF is unclear. We generated transgenic mice and rats with cardiomyocyte-specific CTGF overexpression (CTGF-TG). To investigate CTGF as a fibrosis inducer, we performed morphological and gene expression analyses of CTGF-TG mice and rat hearts under basal conditions and after stimulation with angiotensin II (Ang II) or isoproterenol, respectively. Surprisingly, cardiac tissues of both models did not show increased fibrosis or enhanced gene expression of fibrotic markers. In contrast to controls, Ang II treated CTGF-TG mice displayed preserved cardiac function. However, CTGF-TG mice developed age-dependent cardiac dysfunction at the age of 7 months. CTGF related heart failure was associated with Akt and JNK activation, but not with the induction of natriuretic peptides. Furthermore, cardiomyocytes from CTGF-TG mice showed unaffected cellular contractility and an increased Ca 2+ reuptake from sarcoplasmatic reticulum. In an ischemia/reperfusion model CTGF-TG hearts did not differ from controls. Our data suggest that CTGF itself does not induce cardiac fibrosis. Moreover, it is involved in hypertrophy induction and cellular remodeling depending on the cardiac stress stimulus. Our new transgenic animals are valuable models for reconsideration of CTGF's profibrotic function in the heart.
Synthesis, Isolation, and Characterization of Mono- and Bis-norbornene-Annulated Biarylamines through Pseudo-Catellani Intermediates (2019)

A palladium-catalyzed C-H functionalization of an external ring of N-acyl 2-aminobiaryl with bicyclo[2.2.1]hept-2-ene (norbornene) via multiple C-H bond activations was developed. This study is the first report of the formation of bis-norbornene annulated biarylamines isomers ( syn-3a'/ anti-3a' = 36:64) from multiple C-H bond functionalizations. Additionally, nondirected C-H bond functionalization at the C-4' position with alkenes rendered complete C-H functionalization of five C-H bonds that formed a stable hexasubstituted benzene ring.
Parametric Amplification of Magnons in Synthetic Antiferromagnets (2020)

We demonstrate the parametric amplification of an acoustic magnon mode induced by an optical magnon mode in synthetic antiferromagnets, which was achieved by using the all-optical pump-probe time-resolved magneto-optical Kerr effect. The acoustic and optical modes with low and high frequencies, respectively, are clearly observed under different field directions and pump-laser powers. For a relatively high laser power, the acoustic mode shows a temporal increase in amplitude in the time domain; this is observed when the acoustic mode frequency is approximately half the frequency of the optical mode. Correspondingly, we also observe a large enhancement in the spectral density of the acoustic mode in the frequency domain. These data are supported by a numerical simulation using a macrospin model; furthermore, the optical mode amplitude threshold for achieving the acoustic mode amplification is also discussed. The parametric effect in synthetic antiferromagnets demonstrated here can be applied to nanoscale parametric amplifiers and oscillators of magnons, which are the building blocks for spintronic and magnonic computing beyond von Neumann architectures.