gebhart/patrepeval huggingface dataset:
Stacking versus back propagation in seismic imaging: Duality for multidimensional linearized inversion (1987)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1987Stacking versus back propagation in seismic imaging: Duality for multidimensional linearized inversionAuthors: Cengiz EsmersoyDouglas MillerCengiz EsmersoySchlumberger‐Doll Research and Douglas MillerSchlumberger‐Doll Researchhttps://doi.org/10.1190/1.1891972 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1891972FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 1987ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1987 Pages: 923 publication data© 1987 Copyright © 1987 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 07 Mar 2005 CITATION INFORMATION Cengiz Esmersoy and Douglas Miller, (1987), "Stacking versus back propagation in seismic imaging: Duality for multidimensional linearized inversion," SEG Technical Program Expanded Abstracts : 744-746. https://doi.org/10.1190/1.1891972 Plain-Language Summary PDF DownloadLoading ...
Using data transformations for low-latency time series analysis (2015)

Time series analysis is commonly used when monitoring data centers, networks, weather, and even human patients. In most cases, the raw time series data is massive, from millions to billions of data points, and yet interactive analyses require low (e.g., sub-second) latency. Aperture transforms raw time series data, during ingest, into compact summarized representations that it can use to efficiently answer queries at runtime. Aperture handles a range of complex queries, from correlating hundreds of lengthy time series to predicting anomalies in the data. Aperture achieves much of its high performance by executing queries on data summaries, while providing a bound on the information lost when transforming data. By doing so, Aperture can reduce query latency as well as the data that needs to be stored and analyzed to answer a query. Our experiments on real data show that Aperture can provide one to four orders of magnitude lower query response time, while incurring only 10% ingest time overhead and less than 20% error in accuracy.
Effect of positive end-expiratory pressure on additional passive ventilation generated by CPR compressions in a porcine model (2021)

When increasing positive end-expiratory pressure from 0 to 20, the contribution to overall ventilation from gas oscillations generated by the compressions became more significant, and may even lead to hypocapnia, especially when using positive end-expiratory pressures between 15 and 20.
SPECIFICITY OF A NEW SEROLOGICAL TEST FOR PEDIATRIC CROHN'S DISEASE (1997)

High titers of circulating antibodies (IgG, IgA) against the yeast Saccharomyces cerevisiae have been described in sera of patients with Crohn's disease (CD). Although usually absent in ulcerative colitis (UC) and healthy controls, this assay has not been previously tested in children with other small bowel inflammatory disorders. Aim: To determine the diagnostic accuracy of a modified anti-Saccharomyces assay in pediatric CD and control patients, with particular regard to disease localization (small versus large bowel). Method: Serum specimens (n=107) were obtained in our clinic and analyzed in a blinded, coded manner at Prometheus Laboratories (San Diego, CA). Anti-Saccharomyces antibodies were measured using an ELISA-system (CD·Dx-1) which detects IgA and IgG bound to a highly purified phosphopeptidomannan from S. uvarum. Inflammatory control groups were UC (n=18) or bacterial colitis (n=9), and celiac disease (n=26), as large and small bowel disease controls, respectively. Irritable bowel syndrome (n=5) served as non-inflammatory-controls. Table The sensitivity, specificity, positive and negative predictive values for the CD-assay were: 55%, 97%, 93% and 72%. Conclusions: The CD·Dx-1 assay system proved to be highly specific for Crohn's disease (χ2 p<0.001). This non-invasive test provides an excellent adjunct to clinical and histopathological criteria in the diagnostic work-up of pediatric patients suspected of having IBD. Supported by the DFG German Research Fund (FMR) and the FRSQ (EGS).
A Regio- and Stereocontrolled Approach to Pyranosyl C-Nucleoside Synthesis (2008)

Six novel diastereomerically pure C-nucleosides have been synthesized from nonchiral starting materials, using the ene/intramolecular Sakurai cyclization reaction demonstrating a simple, general, and stereocontrolled approach to pyranosyl C-nucleosides.
L10FePtCu bit patterned media (2011)

Chemically ordered 5 nm-thick L1₀ FePtCu films with strong perpendicular magnetic anisotropy were post-patterned by nanoimprint lithography into a dot array over a 3 mm-wide circumferential band on a 3 inch Si wafer. The dots with a diameter of 30 nm and a center-to-center pitch of 60 nm appear as single domain and reveal an enhanced switching field as compared to the continuous film. We demonstrate successful recording on a single track using shingled writing with a conventional hard disk drive write/read head.
Responses of IL-18- and IL-18 receptor-deficient pancreatic islets with convergence of positive and negative signals for the IL-18 receptor (2006)

Pancreatic islets contain cells that produce IL-18 and cells that express IL-18 receptors. In experimentally induced diabetes, islet failure correlates with IL-18 levels and diabetes is delayed with blockade of endogenous IL-18. We studied islet-derived IL-18 and responses to IL-18 in a mouse model of islet allograft transplantation. In vitro , IL-18-stimulated islets produced nitric oxide, which closely matched islet apoptosis. By neutralizing IL-18 activity with IL-18 binding protein (IL-18BP), we observed that islets produce bioactive IL-18. In vivo , transgenic mice overproducing IL-18BP (IL-18BP-Tg) exhibited delayed hyperglycemia induced by β cell toxic streptozotocin. Similarly, cultured IL-18BP-Tg islets were protected from streptozotocin-induced apoptosis. In the transplant model, islets grafted from WT to IL-18BP-Tg mice achieved prolonged normoglycemia ( P = 0.031). Improved graft function was also observed by using IL-18-deficient islets transplanted into WT recipients, demonstrating that endogenous, islet-derived IL-18 mediates IL-18-driven graft damage. Unexpectedly, islets from mice deficient in IL-18 receptor α chain (IL-18R) exhibited rapid graft failure ( P = 0.024; IL-18- versus IL-18R-deficient grafts in WT recipients). In related studies, IL-18R-deficient splenocytes and macrophages produced 2- to 3-fold greater amounts of IL-18, TNFα, macrophage inflammatory protein 1, macrophage inflammatory protein 2, and IFNγ upon stimulation with Con A, Toll-like receptor 2 agonist, or anti-CD3 antibodies. These data reveal a role for islet-derived IL-18 activity during inflammation-mediated islet injury. Importantly, discrepancies between IL-18- and IL-18R-deficient cells suggest that IL-18Rα chain is used by an inflammation-suppressing signal.
VOISERV: Creation and Delivery of Converged Services through Voice for Emerging Economies (2007)

WWW has made information accessible to computer users in various ways not imagined before. However; there is a huge pool ofpeople, especially in emerging economies, still untouched by this revolution and are either unaware of, or are unable or to join this bandwagon. Mobile phones are increasingly empowering the under-privileged to utilize data and services beyond the basic voice communication. However; factors such as high illiteracy rate, cost sensitivity, and user interface issues prevent these users from deriving benefits of available infrastructure and services. We have developed a novel system - VOISERV that enables ordinary telephone subscribers to create, deploy and offer their own customized voice-driven applications called Voic-eSites. The generated VoiceSites get hosted in the network for low cost of ownership and maintenance, and are integrated with advanced services available in the converged networks of today.
DNA target recognition domains in the Type I restriction and modification systems of Staphylococcus aureus (2017)

Staphylococcus aureus displays a clonal population structure in which horizontal gene transfer between different lineages is extremely rare. This is due, in part, to the presence of a Type I DNA restriction-modification (RM) system given the generic name of Sau1, which maintains different patterns of methylation on specific target sequences on the genomes of different lineages. We have determined the target sequences recognized by the Sau1 Type I RM systems present in a wide range of the most prevalent S. aureus lineages and assigned the sequences recognized to particular target recognition domains within the RM enzymes. We used a range of biochemical assays on purified enzymes and single molecule real-time sequencing on genomic DNA to determine these target sequences and their patterns of methylation. Knowledge of the main target sequences for Sau1 will facilitate the synthesis of new vectors for transformation of the most prevalent lineages of this 'untransformable' bacterium.
A NiFe layered double hydroxide-decorated N-doped entangled-graphene framework: a robust water oxidation electrocatalyst (2020)

Three dimensional (3D) porous carbon materials are highly desirable for electrochemical applications owing to their high surface area and porosity. Uniformly distributed porosity in the 3D architecture of carbon support materials allows reactant molecules to access more electrochemically active centres and simultaneously facilitate removal of the product formed during electrochemical reactions. Herein, we have prepared a nitrogen-doped entangled graphene framework (NEGF), decorated with NiFe-LDH nanostructures by an <i>in situ</i> solvothermal method followed by freeze-drying at high vacuum pressure and low temperature. The freeze-drying method helped to prevent the restacking of the graphene sheets and the formation of a high surface area nitrogen-doped entangled graphene framework (NEGF) supported NiFe-LDHs. The incorporation of the NEGF has significantly reduced the overpotential for the electrochemical oxygen evolution reaction (OER) in 1 M KOH solution. This corresponds to an overpotential reduction from 340 mV for NiFe-LDHs to 290 mV for NiFe-LDH/NEGF to reach the benchmark current density of 10 mA cm<sup>-2</sup>. The preparation of the catalyst is conceived through a low-temperature scalable process.
Improved cardiac magnetic resonance thermometry and dosimetry for monitoring lesion formation during catheter ablation (2016)

Purpose A new real‐time MR‐thermometry pipeline was developed to measure multiple temperature images per heartbeat with 1.6×1.6×3 mm 3 spatial resolution. The method was evaluated on 10 healthy volunteers and during radiofrequency ablation (RFA) in sheep. Methods Multislice, electrocardiogram‐triggered, echo‐planar imaging was combined with parallel imaging, under free breathing conditions. In‐plane respiratory motion was corrected on magnitude images by an optical flow algorithm. Motion‐related susceptibility artifacts were compensated on phase images by an algorithm based on Principal Component Analysis. Correction of phase drift and temporal filter were included in the pipeline implemented in the Gadgetron framework. Contact electrograms were recorded simultaneously with MR thermometry by an MR‐compatible ablation catheter. Results The temporal standard deviation of temperature in the left ventricle remained below 2 °C on each volunteer. In sheep, focal heated regions near the catheter tip were observed on temperature images (maximal temperature increase of 38 °C) during RFA, with contact electrograms of acceptable quality. Thermal lesion dimensions at gross pathology were in agreement with those observed on thermal dose images. Conclusion This fully automated MR thermometry pipeline (five images/heartbeat) provides direct assessment of lesion formation in the heart during catheter‐based RFA, which may improve treatment of cardiac arrhythmia by ablation. Magn Reson Med 77:673–683, 2017. © 2016 International Society for Magnetic Resonance in Medicine
Electrochemical reduction of carbon dioxide catalyzed by cofacial dinuclear metalloporphyrin (2003)

Abstract Cofacial dinuclear metalloporphyrins exhibited a catalytic activity for the electrochemical reduction of carbon dioxide. The cofacial dinuclear porphyrin was automatically generated by mixing a cationic cobalt porphyrin (CoTMPyP) and an anionic metalloporphyrin (MTPPS) in solution. The redox system of this complex was examined by electrochemical methods. According to the cyclic voltammogram, the catalytic active species was generated at −1.8V vs. Ag/Ag + , which was considered to be a monovalent cobalt porphyrin, Co(I)TMPyP. The catalytic activity of the dinuclear complex was two times greater than that of the mononuclear one because the anionic porphyrin acted as an electron mediator.
A study on the effectiveness of dummy pattern design existence in multi-layer PBGA application (2002)

In this paper, we will report our recent study results on the dummy pattern design effectiveness in multi layer PBGA (Plastic Ball Grid Array) packages focusing on final product quality of the semiconductor package. Until now, there is no experimental and empirical assessment on the effectiveness of dummy pattern existence which gives us the solid conviction in applying this concept in a high volume manufacturing scale in the PBGA industrial arena. This paper shows the detailed evaluation and experimental result with various design concepts of dummy patterns in multi layer PBGA substrates. From the thickness validation with same substrate manufacturing condition, to the overall PBGA package performance validation will be covered in this paper. Ball coplanarity and substrate thickness variation data will be reported with analytical simulation result.
ChemInform Abstract: Design, Synthesis and Evaluation of Aspirin Analouges Having an Additional Carboxylate Substituent for Antithrombotic Activity. (2009)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 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.
Synthesis of Nanoparticles Loaded with Tamoxifen by in Situ Miniemulsion RAFT Polymerization (2014)

Summary Tamoxifen (TXF) is a drug used as a hormonal agent for treatment of breast cancer. Due to its low solubility/bioavailability, the effectiveness of TXF can be improved when the drug is combined with drug delivery systems (DDS). For this reason, the in situ incorporation of TXF in polymer particles produced through miniemulsion polymerizations is studied here. Reactions were performed through standard free radical (FR) and RAFT polymerizations, using methyl methacrylate (MMA) as monomer and 2,2'‐azobisisobutironitrila (AIBN) as initiator. It is shown that TXF can be incorporated successfully into the final polymer particles through miniemulsion polymerizations and that the presence of TXF in the reaction medium does not affect significantly the reaction rates, the particle size distribution and the molar mass distribution of the final polymer, even when the monomer feed contains 10 wt% of drug. Therefore, it is shown that DDS containing TXF can be produced by in situ miniemulsion FR and RAFT MMA polymerizations.
A Globally-Variant Locally-Constant Model for Fusion of Labels from Multiple Diverse Experts without Using Reference Labels (2012)

Researchers have shown that fusion of categorical labels from multiple experts&#x2014;humans or machine classifiers&#x2014;improves the accuracy and generalizability of the overall classification system. Simple plurality is a popular technique for performing this fusion, but it gives equal importance to labels from all experts, who may not be equally reliable or consistent across the dataset. Estimation of expert reliability without knowing the reference labels is, however, a challenging problem. Most previous works deal with these challenges by modeling expert reliability as constant over the entire data (feature) space. This paper presents a model based on the consideration that in dealing with real-world data, expert reliability is variable over the complete feature space but constant over local clusters of homogeneous instances. This model jointly learns a classifier and expert reliability parameters without assuming knowledge of the reference labels using the Expectation-Maximization (EM) algorithm. Classification experiments on simulated data, data from the UCI Machine Learning Repository, and two emotional speech classification datasets show the benefits of the proposed model. Using a metric based on the Jensen-Shannon divergence, we empirically show that the proposed model gives greater benefit for datasets where expert reliability is highly variable over the feature space.
An MV-Connected Ultra-Fast Charging Station Based on MMC and Dual Active Bridge with Multiple dc Buses (2023)

The diffusion of electric vehicles will be strongly related to the capacity to charge them in short times. To do so, the necessity of widespread fast charging stations arises. However, their intermittent demand represents a challenging load for grid operators. In order to relieve their impact on the electrical grid operation, integrating storage systems in the charging stations represents a potential solution, although it complicates the overall system management. Moreover, standard converter architectures for the MV grid interface require the installation of bulky transformers and filters. In order to cope with the mentioned problems, this paper proposes an ultra-fast charging station topology based on a modular multilevel converter (MMC) structure and dual-active bridge (DAB) converters. Thanks to the multilevel converter properties, the proposed charging station can be directly interfaced with the MV grid without requiring transformers or filters. Additionally, exploiting the degree of freedom in the converter control system, such as circulating components, offers uneven power distribution among the converter submodules that can be managed. Along with the MMC control strategy, the article addresses a straightforward methodology to select the main parameters of the DAB converter as a function of the involved grid power and circulating power contributions, with the primary goal of obtaining a trade-off between internal balancing performances and a broad soft-switching region without incurring in converter oversizing. The effectiveness of the proposed charging station is finally discussed through numerical simulations, where its behavior during a power demand cycle is analyzed.
Study of Ionic Structure and Ion Reaction Dynamics by Cavity Ring-Down Spectroscopy (2001)

Abstract : Initially, we developed an ion spectrometer that could be used to study the spectroscopy and reactivity of small ions. For this purpose we characterized the discharge source, forming ions by combining an electrical discharge with a supersonic expansion from a pulsed nozzle. After expanding into a vacuum chamber, the ions were detected using cavity ring-down spectroscopy (CRDS), allowing the population of individual states to be determined on an absolute basis. The CRDS detection of the ions from this source was tested with N2+ by probing the B(2) sum sigma(+) - X(2) sum sigma (+)g electronic band system. We are also using Hadamard transform time-of-flight mass spectrometry as the basis for producing an instrument that could be used to analyze and identify the components of potentially contaminated samples.
Diel activity, habitat utilization, and response to anthropogenic interference of small Indian civets (<i>Viverricula indica</i>) in Shanghai urban areas based on camera trapping (2023)

Aims: Rapid urbanization processes have brought great challenges to the conservation of urban biodiversity.The small Indian civet (Viverricula indica) is a national first-class key protected wild animal, yet ecological research about its wild populations in urban environments is rare.The aims of this study are to: (1) understand how small Indian civets respond to stray cats and human activities in time and space in urban landscapes; (2) investigate the habitat characteristics of small Indian civets in a human-dominated landscape; and (3) evaluate habitat changes of small Indian civets during the time period of 2000-2020.Methods: We used infrared camera traps to investigate the small Indian civets in the urban environment.From June 2020 to October 2021, we conducted camera trap surveys at 25 sites in the Xinjiangwan area, Yangpu District,Shanghai.We conducted individual identification, and then analyzed species diel activity pattern and measured the overlapping index and calculated the avoidance-attraction ratios between small Indian civets and stray cats and humans, respectively.In addition, we calculated the relative abundance index (RAI) of humans, stray cats, and birds, and used an independent sample t-test to test the site differences where small Indian civets were detected and not detected.Lastly, we utilized remote sensing data to analyze the landscape changes of small Indian civet habitat during the time period of 2000-2020.Results: We have achieved a sampling effort of 1,581 camera days, and obtained 65 independent small Indian civet detections at night sites.We identified 5 small Indian civet individuals.The diel activity pattern of small Indian civet was strictly nocturnal, with two nighttime activity peaks around 21:00 and 02:00.The temporal overlap index of small Indian civet and human activities was 0.15, and that of stray cats was 0.66.The avoidance-attractive ratio between small Indian civet and stray cats was 9.94 ± 7.84.Human activity at sites where small Indian civets were detected was significantly less than that of the sites where the species was not undetected (t = -2.539,P = 0.021).Landscape analysis results indicated that most of the green space was replaced by artificial landscapes, and the degree of fragmentation and isolation increased during the past two decades.Conclusion: Small Indian civets demonstrate spatial and temporal avoidance to human activities and stray cats.The existing landscapes that are potentially suitable for small Indian civet are fragmented, and immediate actions are needed to conserve the remaining small Indian civet population in urban landscapes.
Human diabetes associated with defects in nuclear regulatory proteins for the insulin receptor gene. (1996)

The control of gene transcription is mediated by sequence-specific DNA-binding proteins (trans-acting factors) that bind to upstream regulatory elements (cis elements). We have previously identified two DNA-binding proteins that specifically interact with two unique AT-rich sequences of the 5' regulatory region of the insulin receptor gene which have in vivo promoter activity. Herein we have investigated the expression of these DNA-binding proteins in cells from two unrelated patients with insulin resistance and non-insulin-dependent diabetes mellitus. In these patients, the insulin receptor gene was normal. In EBV-transformed lymphoblasts from both patients, insulin receptor mRNA levels and insulin receptor expression were decreased. The expression of nuclear-binding proteins for the 5' regulatory region of the insulin receptor gene was markedly reduced, and this defect paralleled the decrease in insulin receptor protein expression. These studies indicate that DNA-binding proteins to the regulatory region of the insulin receptor gene are important for expression of the insulin receptor. Further, they suggest that in affected individuals, defects in the expression of these proteins may cause decreased insulin receptor expression and insulin resistance.