gebhart/patrepeval huggingface dataset:
Learning epipolar geometry from image sequences (2003)

We wish to determine the epipolar geometry of a stereo camera pair from image measurements alone. This paper describes a solution to this problem, which does not require a parametric model of the camera system, and consequently applies equally well to a wide class of stereo configurations. Examples in the paper range from a standard pinhole stereo configuration to more exotic systems combining curved mirrors and wide-angle lenses. The method described here allows epipolar curves to be learnt from multiple image pairs acquired by stereo cameras with fixed configuration. By aggregating information over the multiple image pairs, a dense map of the epipolar curves can be determined on the images. The algorithm requires a large number of images, but has the distinct benefit that the correspondence problem does not have to be explicitly solved. We show that for standard stereo configurations the results are comparable to those obtained from a state of the art parametric model method, despite the significantly weaker constraints on the non-parametric model. The new algorithm is simple to implement, so it may easily be employed on a new and possibly complex camera system.
Structure of polyubiquitinated histone H2A (1989)

We have recently demonstrated that trout liver histones H2A, H2B, and H2A.Z can be polyubiquitinated [Davie, J.R., Delcuve, G.P., Nickel, B.E., Moyer, R., & Bailey, G. (1987) Cancer Res. 47, 5407-5410]. In the present study we determined the arrangement of the ubiquitin molecules in polyubiquitinated histone H2A. Trout liver chromatin fragments. which had histone H1 removed, were digested with Staphylococcus aureus (V8 strain) protease which cleaves specifically on the carboxyl side of glutamic acid residues under the conditions used. The V8 protease readily degraded histone H2A and ubiquitinated (u) H2A at equivalent rates. One site in H2A and uH2A, the peptide bond between Glu 121 and Lys 122, was cleaved, yielding protein species cH2A and cuH2A, respectively. None of the other nucleosomal histones (H2B, H2A.Z, H3, and H4) including uH2B and uH2A.Z were sensitive to digestion. Trout liver histones cleaved with either V8 protease, histone H2A specific protease, or cyanogen bromide were resolved by two-dimensional gel electrophoresis and ubiquitinated peptides detected with anti-ubiquitin IgG. The results suggest that the major arrangement of ubiquitin in polyubiquitinated H2A is a chain of ubiquitin molecules joined to each other by isopeptide bonds to a ubiquitin molecule that is attached to the epsilon-amino group of lysine 119 of histone H2A.
Fuel production by reduction of CO2 using concentrated sunlight - A material study (2012)

Synthesis gas (syngas, CO:H2 1:2) as an intermediate product is an universal precursor for the production of a very broad variety of chemical substances like gaseous and liquid synthetic fuels, polymers, ammonia, methanol, etc. In order to cover the required heat demand for the generation of carbon monoxide (CO) solely from carbon dioxide (CO2), employing concentrated solar energy may be a viable alternative to the state-of-the-art methods like steam reforming or partial oxidation of fossil resources. This emission-free CO production may be carried out in a two-step thermochemical cycle using an oxide material as the catalyst. The two steps are: &#13;\nRegeneration of the metal oxide (MO) (1200-1400 °C): \tMOox = MOred + O2&#13;\nSplitting of CO2 into CO (700 to 1000 °C): \tMOred + CO2 = MOox + CO&#13;\nRedox-material groups for this thermochemical cycle were identified with the aid of thermochemical calculations and comprehensively presented in an Ellingham diagram in previous project stages. Ceria-based materials were found to be the most promising candidate to undergo experimental investigations.&#13;\nIn the recent project phase, zirconia-doped ceria materials were synthesized and characterized by means of XRD and SEM. The performance dependency on the zirconia-content was investigated in lab-scale experiments, mainly thermo-gravimetric experiments. The maximum yields of O2 and CO will be discussed as well as the achieved improvements of conducting and analyzing thermo-gravimetric experiments. &#13;\n
Bayesian Blind and Semi-Blind Equalization of Channels with Markov Inputs (2001)

An original full Bayesian approach is developed for blind and semi-blind equalisation of fading channels with Markov inputs. The sequence of discrete symbols is estimated according to a marginal maximum a posteriori criterion; the other unknown parameters are regarded as random nuisance parameters and are integrated out analytically. A batch algorithm is proposed to maximise the marginal posterior distribution. Simulation results are presented to demonstrate the effectiveness of the method.
NL2API: A Framework for Bootstrapping Service Recommendation Using Natural Language Queries (2018)

Existing approaches to recommend services using natural language queries are supervised or unsupervised. Supervised approaches rely on a dataset with natural language queries annotated with categorizing labels. As the annotation process is manual and requires deep domain knowledge, these approaches are not readily applicable on new datasets. On the other hand, unsupervised approaches overcome the limitation. To date, unsupervised approaches are primarily based on matching keywords, entity relationships, topics and clusters. Keywords and entity relationships ignore the semantic similarity between a query and services. Topics and clusters capture the semantic similarity, but rely on mashups that explicitly capture relationships between services. Again, for new services, the information are not readily available. We propose NL2API, a framework that relies solely on service descriptions for recommending services. NL2API has the benefit of being immediately applicable as a bootstrap recommender for new datasets. To capture relationships among services, NL2API provides different approaches to construct communities where a community represents an abstraction over a group of services. Based on the communities and users' queries, NL2API applies a query matching approach to recommend top-k services. We evaluate NL2API on datasets collected from Programmable Web and API Harmony. Our evaluation shows that for sizable datasets such as Programmable Web NL2API outperforms baseline approaches.
Assessment of Parturition with Cervical Light-Induced Fluorescence and Uterine Electromyography (2013)

Parturition involves increasing compliance (ripening) of the uterine cervix and activation of the myometrium. These processes take place in a different time frame. Softening and shortening of the cervix starts in midpregnancy, while myometrial activation occurs relatively close to delivery. Methods currently available to clinicians to assess cervical and myometrial changes are subjective and inaccurate, which often causes misjudgments with potentially adverse consequences. The inability to reliably diagnose true preterm labor leads to unnecessary treatments, missed opportunities to improve neonatal outcome, and inherently biased research of treatments. At term, the likelihood of cesarean delivery depends on labor management, which in turn depends on accurate assessments of cervical change and myometrial contractility. Studies from our group and others show that noninvasive measurements of light-induced fluorescence (LIF) of cervical collagen and uterine electromyography (EMG) objectively detect changes in the composition of the cervix and myometrial preparedness to labor and are more reliable than clinical observations alone. We present a conceptual model of parturition constructed on cervical LIF and uterine EMG studies. We also explore how these methodologies could be helpful with managing patients experiencing preterm contractions and with optimizing labor management protocols aimed to reduce cesarean section.
Tunable CMOS Integrated Duplexer With Antenna Impedance Tracking and High Isolation in the Transmit and Receive Bands (2014)

A hybrid transformer-based integrated tunable duplexer is demonstrated. High isolation between the transmit and receive ports is achieved through electrical balance between the antenna and balance network impedances. A novel high-power-tolerant balance network, which can be tuned at both the transmit and receive frequencies, allows high isolation in both the transmit and receive bands even under realistic antenna impedance frequency dependence. To maintain high isolation despite antenna impedance variation, a feedback loop is employed to measure the transmitter leakage and correct the impedance of the balance network. An isolation > 50 dB in the transmit and receive bands with an antenna voltage standing-wave ratio within 2:1 was achieved. The duplexer, along with a cascaded direct-conversion receiver, achieves a noise figure of 5.3 dB, a conversion gain of 45 dB, and consumes 51 mW of power. The insertion loss in the transmit path was less than 3.8 dB. Implemented in a 65-nm CMOS process, the chip occupies an active area of 2.2 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .
Cerebrospinal Fluid Leaks Following Anterior Skull Base Trauma: A Systematic Review of the Literature (2022)

Objective: Anterior skull base (ASB) fractures approximately occur in 4% of head injuries and comprise the 21% of all skull fractures. Cerebrospinal fluid (CSF) leaks represent a serious complication that can severely exacerbate clinical outcomes.To systematically review the literature to analyze and compare the role of endoscopic surgery, open surgery, and combined approaches in the repairing cerebrospinal fluid (CSF) leaks following posttraumatic ASB fractures.
Thyroid function in patients with selenium deficiency exhibits high free T4 to T3 ratio (2021)

Selenium, one of the essential trace minerals, is present <i>in vivo</i> in form of selenoproteins. Iodothyronine deiodinase, a selenoprotein, is involved in the activation and inactivation of thyroid hormone. Therefore, patients with selenium deficiency may present changes in thyroid hormone levels due to inhibition of T4 to T3 conversion; however, this assumption is still under debate. In the present study, we retrospectively investigated the thyroid function in 22 patients with selenium deficiency. Thyroid stimulating hormone (TSH) and free T4 (FT4) levels were increased in 3 (14%) and 5 (23%) patients, respectively, and free T3 (FT3) levels were decreased in 6 (27%) patients. The FT4/FT3 ratio was significantly higher in patients with selenium deficiency than that in the control group. There appeared to be a positive correlation between the decreased rate of selenium levels and FT4/FT3 ratio, thereby indicating that patients with severe selenium deficiency also exhibited abnormal thyroid hormone levels. Furthermore, when selenium was supplemented in seven patients with abnormal thyroid hormone levels, the TSH, FT4, and FT4/FT3 ratio were significantly decreased and FT3 levels were increased. Collectively, patients with selenium deficiency could present the characteristics of not only low FT3 but also high FT4 and FT4/FT3 ratio.
Transient Axial Thrust of High-Head Pump-Turbine at Load Rejection (2002)

In the load rejection test of Kazunogawa pumped storage P. S. in Japan, an abnormal axial thrust occurred in a high-head reversible pump-turbine (412 MW and 714 m effective head). The rotating parts including a runner moved 4 mm upward in the axial direction. After taking several countermeasures, this machine is now operating without any problem, but the mechanism of transient axial thrust is not yet clear, though such a transient up-thrust has long been known. The present study is thus aimed to determine the reason why such abnormal axial thrust is caused at the transient operation and how to reduce abnormal thrust. Here adopted is a theoretical approach which has been proved to give satisfactory results in predicting pump axial thrust.
Real-Time Monitoring of Blood Parameters in the Intensive Care Unit: State-of-the-Art and Perspectives (2022)

The number of patients in intensive care units has increased over the past years. Critically ill patients are treated with a real time support of the instruments that offer monitoring of relevant blood parameters. These parameters include blood gases, lactate, and glucose, as well as pH and temperature. Considering the COVID-19 pandemic, continuous management of dynamic deteriorating parameters in patients is more relevant than ever before. This narrative review aims to summarize the currently available literature regarding real-time monitoring of blood parameters in intensive care. Both, invasive and non-invasive methods are described in detail and discussed in terms of general advantages and disadvantages particularly in context of their use in different medical fields but especially in critical care. The objective is to explicate both, well-known and frequently used as well as relatively unknown devices. Furtehrmore, potential future direction in research and development of realtime sensor systems are discussed. Therefore, the discussion section provides a brief description of current developments in biosensing with special emphasis on their technical implementation. In connection with these developments, the authors focus on different electrochemical approaches to invasive and non-invasive measurements in vivo.
Accurate Ego-Vehicle Global Localization at Intersections Through Alignment of Visual Data With Digital Map (2013)

This paper proposes a method for achieving improved ego-vehicle global localization with respect to an approaching intersection, which is based on the alignment of visual landmarks perceived by the on-board visual system, with the information from a proposed extended digital map (EDM). The visual system relies on a stereovision system that provides a detailed 3-D description of the environment, including road landmark information (lateral lane delimiters, painted traffic signs, curbs, and stop lines) and dynamic environment information (other vehicles). An EDM is proposed, which enriches the standard map information with a detailed description of the intersection required for current lane identification, landmark alignment, and ego-vehicle accurate global localization. A novel approach for lane-delimiter classification, which is necessary for the lane identification, is also presented. An original solution for identifying the current lane, combining visual and map information with the help of a Bayesian network (BN), is proposed. Extensive experiments have been performed, and the results are evaluated with a Global Navigation Satellite System of high accuracy (2 cm). The achieved global localization accuracy is of submeter level, depending on the performance of the stereovision system.
A Light on Physiological Sensors for Efficient Driver Drowsiness Detection System (2018)

International audience
Influence of Field Strength and Flexibility on the Transient Electric Birefringence of Segmentally Flexible Macromolecules (2002)

The influence of field strength and flexibility on the transient electric birefringence (TEB) of segmentally flexible macromolecules is studied using a trumbbell with induced and permanent dipoles as a model. According to TEB experiments, the birefringence reaches a steady state after the application of an electric field, a situation which is simulated using a Monte Carlo method. Once the field is removed, relaxation is studied by simulating the Brownian dynamics of the system. Special care has been taken in the statistical quality of the data and the procedure for multiexponential fitting of the decay profiles to obtain the amplitudes and relaxation times. The results are compared with different treatments with occasional agreement and disagreement. The range of applicability of the method proposed by Allison and Nambi (Macromolecules 1992, 25, 759) is discussed. We found that for bent molecules relaxation decay depends on the averaged conformation, flexibility, orientation mechanism, and field intensity. In addition, we show that TEB experiments could be sufficient to characterize the averaged angle of a segmentally flexible macromolecule and its dispersion, mainly if the information concerning amplitudes and faster relaxation times is used.
Query-biased web page summarisation (2001)

We present a system that offers a new way of assessing web document relevance and new approach to the web-based evaluation of such a system. Provisionally named WebDocSum, the system is a query-biased web page summariser that aims to provide an alternative to the short, irrelevant abstracts typical of many web search result lists. Based on an initial evaluation the system appears to be more useful in helping users gauge document relevance than the traditional ranked titles/abstracts approach.
Effect of thin-film structures upon monochromatic optical autofocus systems (1987)

In order to understand the focal properties of an autofocus system employing a monochromatic beam of light, a program was developed which solves Maxwell’s equations at non-normal incidence. This program was then used to calculate the focal dependence of the s and p polarizations upon thin-film structures. Calculations made at 815 nm and 79° are in good agreement with measurements. Unpolarized measurements made at 815 nm and 79° and calculations at normal incidence and other wavelengths point out the dependence of optical autofocus systems on thin-film configurations and the general requirement of a different offset for each thin-film structure.
Multi-view fast-ion D-alpha spectroscopy diagnostic at ASDEX Upgrade (2013)

A novel fast-ion D-alpha (FIDA) diagnostic that is based on charge exchange spectroscopy has been installed at ASDEX Upgrade. The diagnostic uses a newly developed high-photon-throughput spectrometer together with a low-noise EM-CCD camera that allow measurements with 2 ms exposure time. Absolute intensities are obtained by calibrating the system with an integrating sphere and the wavelength dependence is determined to high accuracy using a neon lamp. Additional perturbative contributions to the spectra, such as D2-molecular lines, the Stark broadened edge D-alpha emission, and passive FIDA radiation have been identified and can be subtracted or avoided experimentally. The FIDA radiation from fast deuterium ions after charge exchange reactions can therefore be analyzed continuously without superimposed line emissions at large Doppler shifts. Radial information on the fast ions is obtained from radially distributed lines of sight. The investigation of the fast-ion velocity distribution is possible due to three different viewing geometries. The independent viewing geometries access distinct parts of the fast-ion velocity space and make tomographic reconstructions possible.
The impact of insulin sensitisers on lung function in patients with chronic obstructive pulmonary disease and diabetes. (2010)

Treatment with an IS was independently associated with improvements in FVC in patients with both COPD and DM, compared with treatment without IS.
Numerical investigations on ergodicity of solute transport in heterogeneous aquifers (2006)

Darcy velocities for lognormal hydraulic conductivity with small variance and finite correlation length were approximated by periodic random fields. Accurate simulations of two‐dimensional advection‐dispersion processes were achieved with the global random walk algorithm, using 10 10 particles in every transport realization. Reliable statistical estimations were obtained by averaging over 256 realizations. The main result is a numerical evidence for the mean square convergence of the actual concentrations to the macrodispersion process predicted by a known limit theorem. For small initial plumes the ergodic behavior can be expected after thousands of advection timescales, when the deviation from the theoretical prediction of the cross‐section space‐averaged concentration monotonously decays and falls under 20%. The increase of the transverse dimension of the initial plume slows down the approach to the quasi‐ergodic state and has a nonlinear effect on the variability of the actual concentrations and dispersivities.
Protective Effect of Baicalin Against Carbon Tetrachloride–Induced Acute Hepatic Injury in Mice (2008)

This study examined the effects of baicalin, a bioactive flavonoid isolated from Scutellariae Radix, on carbon tetrachloride (CCl(4))-induced liver injury. Mice were treated intraperitoneally with 0.5 ml/kg CCl(4) and different groups of animals received 25, 50, 100, and 200 mg/kg baicalin. At 24 h after the CCl(4) treatment, the level of serum aminotransferases and lipid peroxidation was significantly elevated, whereas the hepatic glutathione content was decreased. These changes were attenuated by baicalin. The histological studies showed that baicalin inhibited the portal inflammation, centrizonal necrosis, and Kupffer cell hyperplasia, which are the three most common characteristics of CCl(4)-induced liver damage. The serum level and mRNA expression of tumor necrosis factor-alpha were markedly increased by the CCl(4) treatment but suppressed by baicalin. The mRNA and protein expression levels of inducible nitric oxide synthase and heme oxygenase-1 increased significantly at 24 h after the CCl(4) treatment. Baicalin attenuated the increase in the protein and gene expression of inducible nitric oxide synthase but augmented the increase in those of heme oxygenase-1. These findings suggest that baicalin protects hepatocytes from the oxidative damage caused by CCl(4), and this protection is likely due to the induction of HO-1 expression and the inhibition of the proinflammatory mediators.
Radiation on Losses Due to Variations of Radius Dielectric or Optical Fibers (1970)

The total loss of the HE/sub 11/ mode to the radiation field of a finite dielectric rod with small amplitude surface irregularities is considered, and a simple approximate analytic expression for radiation due to sinusoidal roughness is presented. It is shown that radiation occurs only when the frequency of surface roughness /spl Omega/ is in the range /spl beta/-k/sub 2/</spl Omega/</spl beta/+k/sub 2/ where /spl beta/ is the modal propagation constant and k/sub 2/ is the wavenumber of the surrounding medium. An analysis of isolated irregularities and a linear taper with a small change in radius are also presented.