gebhart/patrepeval huggingface dataset:
Inter breath-hold reproducibility of temporal patterns of coronary artery blood flow (2015)

Background While blood flow in the majority of arteries peaks in systole, the rhythmic squeezing of the coronary arteries and microcirculation as the heart beats results in left anterior descending artery (LAD) flow being diastolicpredominant while for the right coronary artery (RCA), there is approximately equal flow in systole and diastole. These temporal flow patterns can provide important information on disease state. The aim of this study is to assess the inter-breath hold reproducibility of parameters of coronary haemodynamics using a high temporal resolution spiral phase velocity mapping technique and to compare automatic and manual analyses.
Superconducting YBa2Cu3O7−δ thin films on GaAs with conducting indium-tin-oxide buffer layers (1990)

Superconducting YBa2Cu3O7−δ (YBCO) thin films have been grown in situ on GaAs with conducting indium-tin-oxide (ITO) buffer layers. Superconducting onset is about 92 K with zero resistance at 60 K. ITO buffer layers usually form Schottky-like barriers on GaAs. The YBCO film and ITO buffer layer, grown by ion beam sputter codeposition, are textured and polycrystalline with a combined room-temperature resistivity of about 1 mΩ cm.
Ablation of Drosophila photoreceptor cells by conditional expression of a toxin gene. (1991)

We have used toxin-mediated ablation to study some aspects of visual system development in Drosophila melanogaster. To devise a method that permits the conditional expression of a cellular toxin, we introduced an amber mutation into the diphtheria toxin-A-chain gene. In transgenic animals, this toxin gene can be activated by providing the gene for an amber suppressor tRNA. By coupling this toxin gene to the photoreceptor cell-specific promoter of the chaoptic gene, photoreceptor cells could be specifically ablated during development. Photoreceptor cell-specific markers normally activated during pupal development failed to appear after midpupation. Photoreceptor cells were absent from the retinas of adult flies at eclosion. We have assessed the consequences of photoreceptor cell ablation for eye and optic lobe development. We suggest that the larval photoreceptor nerve is not essential, in the late larval stages, for retinula photoreceptor cell axons to achieve their proper projection pattern in the brain. Moreover, while retinula photoreceptor innervation is initially required for the development of normal optic ganglia, the ablation of these cells in midpupation has no discernible effect. This approach to cell-specific ablation should be generally applicable to the study of cellular functions in development and behavior.
Low temperature dry etching of copper using a new chemical approach (1998)

The increasing demand for faster microelectronic circuits with improved performance will force fundamental changes in future semiconductor manufacturing. The realization of deep submicron feature sizes in ultra-large-scale integration (ULSI) devices together with higher clock frequencies will depend on the use of new microelectronic materials. Due to its lower resistivity and better resistance to electromigration copper is the most likely material to replace aluminum or aluminum alloys as interconnect metal. Several problems connected to the physical and chemical properties of this metal have to be solved to achieve this. One of these problems concerns the formation of patterned copper films. In addition to selective CVD of Cu and chemical mechanical polishing (CMP) of blanket films deposited in trenches, the dry etching of Cu using standard photoresist masks would be the 'common' way to perform this. In this work we report a new chemical approach to the dry etching of copper by the formation of volatile metal-organic copper(I)compounds.
Highly Polar Linkers (Urea, Carbamate, Thiocarbamate) for Superoleophobic/Superhydrophobic or Oleophobic/Hydrophilic Properties (2015)

Due to the much lower surface tension of oils in comparison to water, it is extremely difficult to obtain superoleophobic properties and also both oleophobic and hydrophilic properties. While the obtaining of superoleophobic properties needs extremely complex surface structures such as reentrant structures to impede the oil wetting, the obtaining of both oleophobic and hydrophilic properties needs the use of both oleophobic materials (fluorinated materials) and hydrophilic materials (charged or polar species). Here, by electropolymerization of original 3,4‐ethylenedioxythiophene derivatives containing both fluorinated chains (C 8 F 17 , C 6 F 13 , or C 4 F 9 ) and highly polar linkers (thiocarbamate SCONH, carbamate OCONH, and urea NHCONH), the possibility to obtain superoleophobic properties and also both oleophobic and hydrophilic properties is reported for the first time. More precisely superoleophobic properties are obtained with different fluorinated chain lengths and linkers while the obtaining of both oleophobic and hydrophilic properties is possible only with the most polar urea NHCONH linkers.
Scheme86: An Architecture for Microcoding a Scheme Interpreter (1988)

I describe the design and implementation plans for a computer that is optimized as a microcoded interpreter for Scheme. The computer executes SCode, a typed-pointer representation. The memory system has low-latency as well as high throughput. Multiple execution units in the processor complete complex operations in less than one memory cycle, allowing efficient use of memory bandwidth. The processor provides hardware support for tagged data objects and runtime type checking. I will discuss the motivation for this machine, its architecture, why it can interpret Scheme efficiently, and the computer-aided design tools developed for building this computer.
Effect of Reduction of Iron (Fe) Stores on Cardiovascular and Cancer Outcomes in Patients with Advanced Peripheral Arterial Disease (PAD): VA Cooperative Study #410, the Iron (Fe) and Atherosclerosis Study (FeAST). (2006)

Abstract Background: Age-related accumulation of excess Fe has been implicated in risk of disease, including cardiovascular disease and malignancy, through Fe-catalyzed free radical-mediated mechanisms. Methods: The effect of reducing body Fe stores through phlebotomy on disease risk and mortality was tested in a multi-center randomized, controlled, single-blinded clinical trial conducted between May 1, 1999 and April 30, 2005 in a cohort of 1,277 patients with symptomatic PAD. Patients with conditions likely to cause acute phase elevation of the ferritin level or with a diagnosis of visceral malignancy within the preceding five years were excluded. Patients were randomly assigned to control or reduction of Fe stores by graded phlebotomy (avoiding Fe deficiency) with stratification by hospital, age, baseline ferritin, diagnosis of diabetes mellitus, smoking status and HDL/LDL ratio. The primary outcome was all cause mortality; the secondary outcome was combined death plus non-fatal myocardial infarction and stroke. New non-fatal cardiovascular events and new disease diagnoses, including histologically confirmed visceral malignancy, were recorded during follow-up. Results: There were no significant differences between Fe reduction and control groups for the primary (p=0.172) or secondary (p=0.202) study outcomes. The mean age at entry was 67 years. Patients in the youngest age quartile randomized to Fe reduction had a 53.6% reduction in the primary endpoint (p = 0.019) and a 57% reduction in the secondary endpoint (p &lt;0.001) compared to control patients. Kaplan - Meier analysis of the secondary endpoint revealed a significantly reduced hazard ratio with Fe reduction that was graded in patients within the youngest age quartile (p &lt;0.001) and that persisted after excluding patients dying of cancer (p = 0.007). Patients randomized to Fe reduction had a 36.7% lower risk of cancer occurrence (p = 0.023) and a 68.6% lower cancer mortality (p = 0.003) compared to control patients. Reduced cancer risk was observed for most tumor types and occurred over the entire patient age range. Conclusions: Fe reduction in patients with symptomatic PAD did not confer an overall benefit in cardiovascular disease risk and mortality. Apparent improvement in cardiovascular outcomes with Fe reduction in the youngest age quartile suggests a role for Fe relatively early in the course of disease but confirmation in studies of specific patient subsets is needed. Fe reduction decreased cancer risk and mortality, an effect that was not age-related. Ferritin levels found commonly in adults are associated with disease risk while levels characteristic of childhood and pre-menopausal women (below about 80 ng/ml) are associated with reduced risk. These results suggest strategies for low-cost and non-toxic disease prevention and treatment through patient monitoring, selective and graded Fe reduction, and attention to optimal Fe nutrition.
Synchronized reinjection and coalescence of droplets in microfluidics (2013)

Coalescence of two kinds of pre-processed droplets is necessary to perform chemical and biological assays in droplet-based microfluidics. However, a robust technique to accomplish this does not exist. Here we present a microfluidic device to synchronize the reinjection of two different kinds of droplets and coalesce them, using hydrostatic pressure in conjunction with a conventional syringe pump. We use a device consisting of two opposing T-junctions for reinjecting two kinds of droplets and control the flows of the droplets by applying gravity-driven hydrostatic pressure. The hydrostatic-pressure operation facilitates balancing the droplet reinjection rates and allows us to synchronize the reinjection. Furthermore, we present a simple but robust module to coalesce two droplets that sequentially come into the module, regardless of their arrival times. These re-injection and coalescence techniques might be used in lab-on-chip applications requiring droplets with controlled numbers of solid materials, which can be made by coalescing two pre-processed droplets that are formed and sorted in devices.
Excisional biopsy of impalpable soft tissue tumors US-guided preoperative localization in 12 cases (1997)

We present a technique to facilitate excisional biopsy of impalpable soft tissue tumors. A modified Kopans localization needle is positioned preoperatively under ultrasound-guidance (7.5 MHz). The needle contains a hookwire with an over-bent hook that springs open when protruded beyond the needle tip and anchors the wire in the lesion. The technique was used in 12 patients and facilitated excisional biopsy in all of them.
Preparation and Readout of Multielectron High-Spin States in a Gate-Defined GaAs/AlGaAs Quantum Dot (2021)

We report the preparation and readout of multielectron high-spin states, a three-electron quartet, and a four-electron quintet, in a gate-defined GaAs/AlGaAs single quantum dot using spin filtering by quantum Hall edge states coupled to the dot. The readout scheme consists of mapping from multielectron to two-electron spin states and a subsequent two-electron spin readout, thus obviating the need to resolve dense multielectron energy levels. Using this technique, we measure the relaxations of the high-spin states and find them to be an order of magnitude faster than those of low-spin states. Numerical calculations of spin relaxation rates using the exact diagonalization method agree with the experiment. The technique developed here offers a new tool for the study and application of high-spin states in quantum dots.
An on chip ADC test structure (2000)

Article An on chip ADC test structure Share on Authors: Yun-Che Wen Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C. Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C.View Profile , Kuen-Jong Lee Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C. Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C.View Profile Authors Info & Claims DATE '00: Proceedings of the conference on Design, automation and test in EuropeJanuary 2000 Pages 221–225https://doi.org/10.1145/343647.343765Online:01 January 2000Publication History 6citation285DownloadsMetricsTotal Citations6Total Downloads285Last 12 Months11Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Aanpassing voer vergemakkelijkt de toepassing van pluimveemest : eerste resultaten van pilotstudies naar effect van biologische fytase positief (2010)

In Nederland zijn er nu ruim 1 miljoen biologische legkippen die jaarlijks bijna 300 miljoen eieren produceren maar ook 25.000 ton mest. De meeste legkippenhouders hebben zelf weinig grond en moeten de mest afvoeren. Het project ‘Kippenmest en Kringloop’ streeft er naar deze mest zo goed mogelijk in te zetten en te benutten binnen de biologische landbouw. Om de mest aantrekkelijker te maken voor bijvoorbeeld de akkerbouw is het belangrijk dat de mestkwaliteit en daarbij met name de verhouding tussen stikstof en fosfaat verbetert. In 2009 en 2010 zijn pilots uitgevoerd om het effect van aanpassingen in het kippenvoer op de mestkwaliteit te onderzoeken.
Analytic Signal Phase in $N-D$ by Linear Symmetry Tensor--fingerprint\n modeling (2020)

We reveal that the Analytic Signal phase, and its gradient have a hitherto\nunstudied discontinuity in $2-D $ and higher dimensions. The shortcoming can\nresult in severe artifacts whereas the problem does not exist in $1-D $\nsignals. Direct use of Gabor phase, or its gradient, in computer vision and\nbiometric recognition e.g., as done in influential studies\n\\cite{fleet90,wiskott1997face}, may produce undesired results that will go\nunnoticed unless special images similar to ours reveal them. Instead of the\nAnalytic Signal phase, we suggest the use of Linear Symmetry phase, relying on\nmore than one set of Gabor filters, but with a negligible computational add-on,\nas a remedy. Gradient magnitudes of this phase are continuous in contrast to\nthat of the analytic signal whereas continuity of the gradient direction of the\nphase is guaranteed if Linear Symmetry Tensor replaces gradient vector. The\nsuggested phase has also a built-in automatic scale estimator, useful for\nrobust detection of patterns by multi-scale processing. We show crucial\nconcepts on synthesized fingerprint images, where ground truth regarding\ninstantaneous frequency, (scale \\&amp; direction), and phase are known with\nfavorable results. A comparison to a baseline alternative is also reported. To\nthat end, a novel multi-scale minutia model where location, direction, and\nscale of minutia parameters are steerable, without the creation of\nuncontrollable minutia is also presented. This is a useful tool, to reduce\ndevelopment times of minutia detection methods with explainable behavior. A\nrevealed consequence is that minutia directions are not determined by the\nlinear phase alone, but also by each other and the influence must be corrected\nto obtain steerability and accurate ground truths. Essential conclusions are\nreadily transferable to $N-D $, and unrelated applications, e.g. optical flow\nor disparity estimation in stereo.\n
UV‐Triggered Polydopamine Secondary Modification: Fast Deposition and Removal of Metal Nanoparticles (2019)

Abstract Since the first report in 2007, polydopamine (PDA) coating has shown great potential as a general and versatile method to create functional nanocoatings on arbitrary substrates. Slow kinetics and poor controllability of the coating and secondary modification processes, however, have limited the further development of this attractive method. In this work, it is demonstrated that UV irradiation at 365 nm significantly accelerates the process of secondary modification of a PDA‐coated surface. The kinetics of both thiol and amine modifications of PDA are increased 12‐fold via UV irradiation, while the kinetics of metal ion reduction at the PDA interface is increased more than 550 times. Moreover, it is demonstrated that irradiating a PDA/metal nanoparticle composite surface with UV light at 254 nm leads to dissolution of the deposited metal nanoparticles (MNPs). Finally, grayscale metallic patterns, dynamic deposition, and removal of MNPs on PDA surface are realized with the proposed method.
Hydroboration with Pyridine Borane at Room Temperature (2008)

ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionHydroboration with Pyridine Borane at Room TemperatureJulia M. Clay, Andrew G. Karatjas, and Edwin VedejsCite this: J. Am. Chem. Soc. 2008, 130, 32, 10828Publication Date (Web):July 18, 2008Publication History Published online18 July 2008Published inissue 13 August 2008https://pubs.acs.org/doi/10.1021/ja8046602https://doi.org/10.1021/ja8046602correctionACS PublicationsCopyright © 2008 American Chemical Society. This publication is available under these Terms of Use. Request reuse permissions This publication is free to access through this site. Learn MoreArticle Views2083Altmetric-Citations3LEARN 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 PDF (46 KB) Get e-AlertscloseSUBJECTS:Adducts,Cations,Group 13 compounds,Mixtures,Salts Get e-Alerts
GaN HEMT‐based hybrid current‐mode class‐S power amplifier for 955 MHz LTE signal (2014)

ABSTRACT This article presents a gallium nitride‐based hybrid current‐mode class‐S (CMCS) power amplifier (PA) in conjunction with a realized band‐pass delta‐sigma modulator for 955 MHz long‐term evolution (LTE) signal. Commercial surface mount Schottky diodes are located behind switching transistors to protect them against negative voltage swing, and performances are analyzed from the perspective of the variations of the output voltage and current waveforms by the intrinsic components of diode. In particular, the chip‐on‐board technique is adopted to enhance the drain efficiency, and the differential output filter and balun composed of lumped LC resonators are integrated at the back of the switching transistor to extract amplified LTE signal. From the measured results with an 8.5 dB peak to average power ratio 3G LTE 10 MHz input signal, the proposed CMCS PA shows maximum average output power of 37.1 and 32.2 dBm, and the resulting drain efficiencies of 35.5 and 38.5% with the drain voltage of 20 and 10 V, respectively. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2118–2121, 2014
Structure-based statistical thermodynamic analysis of T4 lysozyme mutants: structural mapping of cooperative interactions (1997)

The recent development of a structural parameterization of the energetics of protein folding has permitted the incorporation of the functions that describe the enthalpy, entropy and heat capacity changes, i.e. the individual components of the Gibbs energy, into a statistical thermodynamic formalism that describes the distribution of conformational states under equilibrium conditions. The goal of this approach is to construct with the computer a large ensemble of conformational states, and then to derive the most probable population distribution, i.e. the distribution of states that best accounts for a wide array of experimental observables. This analysis has been applied to four different mutants of T4 lysozyme (S44A, S44G, V131A, V131G). It is shown that the structural parameterization predicts well the stability of the protein and the effects of the mutations. The entire set of folding constants per residue has been calculated for the four mutants. In all cases, the effect of the mutations propagates beyond the mutation site itself through sequence and three-dimensional space. This phenomenon occurs despite the fact that the mutations are at solvent-exposed locations and do not directly affect other interactions in the protein. These results suggest that single amino acid mutations at solvent-exposed locations, or other locations that cause a minimal perturbation, can be used to identify the extent of cooperative interactions. The magnitude and extent of these effects and the accuracy of the algorithm can be tested by means of NMR-detected hydrogen exchange.
A No-Reference Image Blur Metric Based on the Cumulative Probability of Blur Detection (CPBD) (2011)

This paper presents a no-reference image blur metric that is based on the study of human blur perception for varying contrast values. The metric utilizes a probabilistic model to estimate the probability of detecting blur at each edge in the image, and then the information is pooled by computing the cumulative probability of blur detection (CPBD). The performance of the metric is demonstrated by comparing it with existing no-reference sharpness/blurriness metrics for various publicly available image databases.
Spontaneous Raman scattering by ground-state oxygen atoms (1981)

We report the first known observation of Raman scattering by oxygen atoms. The (3)P(2)?(3)P(1) and (3)P(2)?(3)P(0) transitions in the electronic ground state that produced Raman shifts of 158 and 227 cm(-1) were detected. These transitions were observed in a fuel-lean atmospheric H(2) + O(2) flame. By comparing the O electronic and O(2) pure-rotational Raman-scattering intensities, we measured the polarized cross sections for the two lines to be 6 +/- 1 x 10(-31) and 4 +/- 1 x 10(-31) cm(2)/sr, respectively, with an excitation source at 532.1 nm. These cross sections are two to three times stronger than those predicted by a single-configuration single-excitation Coulomb approximation.