gebhart/patrepeval huggingface dataset:
Multiple cooperating mobile manipulators (2003)

The main goal of the paper is to present a framework and basic control algorithms for coordinating a small team of robots in tasks that involve grasping large objects and transporting them in a two-dimensional environment with obstacles. Each robot consists of a mobile platform and an arm. Some arms are passive while others are active. Our previous work (1998) addressed the manipulator design, the architecture, and the communication between robots. In this paper we address the control of the manipulators, the coordination between the platforms for a team of two or three cooperating robots, and the handling of flexible large objects.
A RANSAC-Based Track Initialization Algorithm for Multi-Sensor Tracking System (2018)

For multi-sensor tracking system, track initialization is a problem due to crossed data association between different frames and different sources. In this paper, a RANSAC-based track initialization algorithm for multi-sensor system is proposed. Considering the fact that target motion is contiguous in time-space domain, measurements of the target are homologous to the target motion model. Therefore, the proposed algorithm uses homology to associate all measurements regardless of frames and sources. RANSAC technology is used to recursively learn the target motion model, associating continuous measurements from all sensors. It is better to avoid missing measurement effects in some frames or in some sensors through a homology association mechanism. Compared with the traditional track initialization algorithm, the proposed algorithm maintains good robustness in noise and clutter environment, which is confirmed by simulation results in this paper.
An archaebacterial promoter sequence assigned by RNA polymerase binding experiments (1989)

To identify an archaebacterial promoter sequence, nuclease protection studies with the purified RNA polymerase of Methanococcus vannielii were performed. The enzyme binds specifically both at protein-encoding (hisA and methyl CoM reductase, component C) and tRNA-rRNA genes. The binding region of the RNA polymerase extends from 30 base pairs (bp) upstream (-30) to 20 bp downstream (+20) from the in vivo transcription start site. This finding indicates that the archaebacterial enzyme recognizes promoters without transacting transcription factors. The DNA segment protected from nuclease digestion by bound RNA polymerase contains an octanucleotide sequence centered at -25, which is conserved between the protein-encoding and the stable RNA genes. According to the specific binding of the enzyme to only DNA-fragments harbouring this motif, we propose the sequence TTTATATA as the major recognition signal of the Methanococcus RNA polymerase. Comparison of this motif with published archaebacterial DNA sequences revealed the presence of homologous sequences at the same location upstream of 36 genes. We therefore consider the overall consensus TTTATAATA as a general element of promoters in archaebacteria. In spite of the specific binding of the enzyme, most preparations of the Methanococcus vannielii RNA polymerase are unable to initiate transcription at the correct sites in vitro. Here we present first evidence for the possible existence of a transcription factor conferring the ability to the enzyme to initiate and terminate transcription specifically in vitro.
Insulin Treatment of Mice Recipients Preserves β-Cell Function in Porcine Islet Transplantation (2002)

Encapsulation of islets of Langerhans confers protection against cell-mediated immune destruction and so should allow the transplantation of islets without immunosuppression. Xenotransplantation of encapsulated islets of Langerhans might therefore help overcome problems of human organ donor shortage. Given that islets exposed to sustained hyperglycemia show impaired beta-cell function, we set out to determine whether recipient treatment with insulin could improve transplantation success rate. Islets of Langerhans were obtained from Specific Germ-Free (SPF) pig pancreas and cultured overnight. Islets were encapsulated in AN69 fibers and implanted into the peritoneal cavity of diabetic mice. A group of implanted mice was treated with exogenous insulin from day 3 to day 7 after grafting. Islet implantation depressed plasma glucose in all the mice, both insulin treated and untreated. Glycemia slowly increased in the non-insulin-treated mice, whereas the decrease observed in the insulin-treated mice was maintained until day 29 of follow-up. We found significant differences between the two groups (p < 0.05 at day 18 and day 20, p < 0.001 at day 23 and day 29). No improvement of hyperglycemia was observed in diabetic mice implanted with empty fibers. When islet-containing fibers were removed from the peritoneal cavity of mice 1 month after the graft plasma glucose increased markedly. We demonstrate that treatment of recipients with exogenous insulin in the immediate posttransplantation period has a positive effect on beta-cell function in transplanted macroencapsulated porcine islets.
Glucocorticoids with low-dose anti-IL1 anakinra rescue in severe non-ICU COVID-19 infection: A cohort study (2020)

In COVID-19 non-ICU inpatients at the cytokine release phase, corticosteroids with or without anakinra were associated with a 30% decrease of death risk on Day 15.
Performance Comparison of Multi-Stage Adsorption Chillers at the Optimal Operating Conditions(<Special Issue>The 14th National Symposium on Power and Energy System) (2010)

The multi-stage adsorption chillers can be driven by low temperature heat source under 70℃. The purpose of the study is to clarify the maximum specific cooling capacity (SCC) of the multi-stage adsorption chillers by the cycle time optimization. The optimal cycle times of the multi-stage adsorption chillers were found using the particle swarm optimization. The comparison of the optimal performances revealed that the two-stage adsorption chiller was superior to the single-stage and three-stage adsorption chillers within a wide temperature range of the driving heat source.
Structural studies of group 5B–halide–dithio-ligand complexes. Part 1. Crystal structures of bis(NN-diethyldithiocarbamato)-iodo- and -bromo-bismuth(III) (1981)

The crystal structures of the two compounds [Bi(S2CNEt2)2l], (1), and [Bi(S2CNEt2)2Br], (2), have been determined by single-crystal X-ray diffraction methods at 295(1) K and refined by least-squares procedures to conventional residuals of 0.044 and 0.040 respectively for 1 859 and 3 055 ‘observed’ reflections. Crystals of (1) are monoclinic, space group P21/c, with a= 12.054(2), b= 18.444(3), c= 8.815(2)Å, β= 108.09(1)°, and Z= 4. The structure is a linear polymer with bridging iodine atoms cis in the co-ordination sphere of the six-co-ordinate bismuth [Bi–l, 3.257(2), 3.354(1)Å; Bi–S, 2.646(4)–2.860(5)Å]. Crystals of (2) are triclinic, space group P with a= 14.388(7), b= 14.033(5), c= 10.297(2)Å, α= 99.56(2), β= 104.70(3), γ= 108.10(3)°, and Z= 4. The structure comprises a tetranuclear centrosymmetric unit with the bismuth atoms bridged by two- and three-co-ordinate bromine atoms.
Tracheal occlusion conditioning causes stress, anxiety and neural state changes in conscious rats (2012)

Evidence from human and animal studies indicates that mechanical loads to breathing are stressful stimuli and evoke compensatory behaviours. Conditioning of stressful stimuli is known to cause changes in basal stress levels and behaviour. Individuals with respiratory obstructive diseases repeatedly experience bouts of airway obstruction, which may act as a form of conditioning, and often have affective disorders, such as anxiety and depression. It is unknown whether the development of affective disorders in these individuals results from the unexpected recurring respiratory perturbations. To investigate this possibility, we developed a model to elicit tracheal occlusion (TO) in conscious rats and exposed them to 10 days of TO conditioning. We hypothesized that healthy, conscious animals exposed to TO conditioning would develop stress and anxiety and would have modulated neural activity in respiratory, stress, discriminative and affective neural regions. Following TO conditioning, rats had increased basal corticosterone levels, greater adrenal weights and elevated anxiety levels compared with animals not receiving TO. Significant increases in cytochrome oxidase staining were found in brainstem respiratory nuclei, periaqueductal grey, dorsal raphe, thalamus and insular cortex. These results suggest that healthy animals develop stress and anxiety responses to respiratory load conditioning via inescapable tracheal occlusions, which may be mediated through state changes in specific brain nuclei.
Approximate nearest neighbors via dictionary learning (2011)

Approximate Nearest Neighbors (ANN) in high dimensional vector spaces is a fundamental, yet challenging problem in many areas of computer science, including computer vision, data mining and robotics. In this work, we investigate this problem from the perspective of compressive sensing, especially the dictionary learning aspect. High dimensional feature vectors are seldom seen to be sparse in the feature domain; examples include, but not limited to Scale Invariant Feature Transform (SIFT) descriptors, Histogram Of Gradients, Shape Contexts, etc. Compressive sensing advocates that if a given vector has a dense support in a feature space, then there should exist an alternative high dimensional subspace where the features are sparse. This idea is leveraged by dictionary learning techniques through learning an overcomplete projection from the feature space so that the vectors are sparse in the new space. The learned dictionary aids in refining the search for the nearest neighbors to a query feature vector into the most likely subspace combination indexed by its non-zero active basis elements. Since the size of the dictionary is generally very large, distinct feature vectors are most likely to have distinct non-zero basis. Utilizing this observation, we propose a novel representation of the feature vectors as tuples of non-zero dictionary indices, which then reduces the ANN search problem into hashing the tuples to an index table; thereby dramatically improving the speed of the search. A drawback of this naive approach is that it is very sensitive to feature perturbations. This can be due to two possibilities: (i) the feature vectors are corrupted by noise, (ii) the true data vectors undergo perturbations themselves. Existing dictionary learning methods address the first possibility. In this work we investigate the second possibility and approach it from a robust optimization perspective. This boils down to the problem of learning a dictionary robust to feature perturbations, viz. paving the way for a novel Robust Dictionary Learning (RDL) framework. In addition to the above model, we also propose a novel LASSO based multi-regularization hashing algorithm which utilizes the consistency properties of the non-zero active basis for increasing values of the regularization weights. Even though our algorithm is generic and has wide coverage in different areas of scientific computing, the experiments in the current work are mainly focused towards improving the speed and accuracy of ANN for SIFT descriptors, which are high-dimensional (128D) and are one of the most widely used interest point detectors in computer vision. Preliminary results from SIFT datasets show that our algorithm is far superior to the state-of-the-art techniques in ANN.
Mobility management in current and future communications networks (1998)

This article describes current and proposed protocols for mobility management for public land mobile networks (PLMNs), Mobile IP, wireless ATM, and satellite networks. The integration of these networks is discussed in the context of the next evolutionary step of wireless communications networks. First, a review is provided of location management algorithms for PCS implemented over a PLMN. The latest protocol changes for location registration and handoff are investigated for Mobile IP, followed by a discussion of proposed protocols for wireless ATM and satellite networks. Finally, an outline of open problems to be addressed by the next generation of wireless network service is discussed.
TouchSignatures (2015)

Conforming to the recent W3C specifications (www.w3.org/TR/orientation-event), modern mobile web browsers generally allow JavaScript code in a web page to access motion and orientation sensor data without the user's permission. The associated risks to user privacy are however not considered in W3C specifications. In this work, for the first time, we show how user privacy can be compromised using device motion and orientation sensor data available in-browser, despite the fact that the data rate is 5 to 10 times slower than what is attainable in-app. We examine different browsers on the Android and iOS platforms and study their policies in granting permissions to JavaScript code with respect to access to motion and orientation sensor data and identify multiple vulnerabilities. Based on our findings, we propose TouchSignatures, implementation of an attack in which malicious JavaScript code on an inactive tab listens to such sensor data measurements. Based on these streams, TouchSignatures is able to distinguish the user's touch actions (e.g., tap, scroll, hold, and zoom) on an active tab, allowing the remote website to learn the client-side user activities. Finally, we demonstrate the practicality of this attack by collecting real-world user data and reporting high success rates using our proof-of-concept implementation.
Pyroelectricity and charge transport in a copolymer of vinylidene fluoride and tetrafluoroethylene (1976)

Previous investigations have shown that a copolymer of vinylidene fluoride and tetrafluoroethylene can be made piezoelectric and pyroelectric by the temporary application of an electric field. <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∗1, 2</sup> For applied fields in excess of about 250 kV/cm, the electrical response became independent of applied field, independent of poling temperature between 0° and 60°C, and independent of poling time between 5 minutes and 7 hours. <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1, 2</sup> Such behavior implied saturation of polarization, and values of polarization required to account for the piezoelectric response were well within the maximum to be expected from alignment of dipoles within the crystalline phase of the copolymer. Measurements on similar films now indicate that the polarization distribution within the films is non-uniform and varies with poling temperature. This paper presents these results and will propose a model of charge transfer within the film to reconcile the evidence for saturation polarization and nonuniform charge distribution.
Evaluating the Impact of the Guard Band Width on the Benefits of Probabilistic Constellation Shaping in Future Flex-Grid over Multicore Fibre Optical Backbone Networks (2023)

Probabilistic constellation shaping (PCS) has emerged as an advanced modulation technique that provides a fine-grained software-defined trade-off between achievable spectral efficiency (SE) and transmission reach to deliver optimal channel capacity at any distance. This paper quantifies the network throughput benefits resulting from adopting PCS in future Flex-Grid over multicore fibre optical backbone networks, compared to using traditional uniform modulation formats. In particular, different inter-channel guard band width configurations are accounted in our study, aiming to set guidelines on the technological requirements imposed to network spectrum selective switches (SSS) to take full PCS advantage in future optical backbone networks.
Spherical Assemblies from π-Conjugated Alternating Copolymers: Toward Optoelectronic Colloidal Crystals (2012)

Self-assembly of conducting polymers, which are often used as photoabsorbing, charge-transporting, and photoemission layers of organic photovoltaic and light-emitting devices, were comprehensively studied by means of slow precipitation from polymer solutions upon addition of a vapor of nonsolvents. Polymers such as polyfluorene and polythiophene having a single monomer component hardly formed defined and discrete objects but only gave ill-defined aggregates. In contrast, alternating copolymers typically having both fluorene and thiophene components in their repeating unit self-assembled into well-shaped spheres with diameters ranging from several hundreds of nanometers to several micrometers. Such clear differences in terms of the assembling geometries derive from the rigidity and crystallinity of the polymers, where the copolymers possess large steric hindrance on their backbone that reduces planarity of the polymers and inhibits anisotropic crystal growth, leading to the formation of structurally isotropic spheres. Changing the assembling parameters can systematically control diameter and deviation of the spheres. Furthermore, photocarrier lifetimes of the spheres were markedly enhanced by more than 3 orders of magnitude in comparison with those of cast films from their solutions. This research gives a useful guide for preparation of colloidal crystals from π-conjugated polymers toward their optoelectronic applications.
Procedimiento general para purificar a pequeña escala las fimbrias expresadas por cepas porcinas de Escherichia coli enterotoxigénicas (2008)

La fimbriación en cepas de Escherichia coli enterotoxigénicas es un proceso complejo controlado por varios mecanismos: reguladores globales y locales de la transcripción y el control postranscripcional, e influenciado por factores como velocidad de crecimiento bacteriano, composición del medio de cultivo, temperatura y pH, entre otros. Estas características propician que la expresión fimbrial se pierda con alta frecuencia. De allí que se requieran procedimientos de cultivo que favorezcan el mantenimiento de dicha expresión. Con ese objetivo, en el trabajo la población bacteriana fimbriada se enriqueció mediante cultivo estático en caldo Mueller-Hinton. Luego, la expresión fimbrial se mantuvo mediante el crecimiento en forma consecutiva en agar CFA, y el caldo Minca o Mínimo, según el tipo fimbrial, en los que se alcanzó la máxima expresión a las 4-5h de cultivo. Las fimbrias se extrajeron mediante tratamiento térmico y se precipitaron con sulfato de amonio al 40%. La purificación se realizó mediante exclusión molecular y el tratamiento con deoxicolato de sodio. La metodología propuesta integra procedimientos conocidos en un proceso simple y reproducible para la obtención de las fimbrias F4, F5, F6 y F41 en cantidades suficientes para su posterior uso en la generación de anticuerpos, el desarrollo de inmunoensayos y otros estudios a escala de laboratorio, que necesiten de preparaciones con una pureza superior al 80%, que mantengan su estructura nativa. Palabras clave: Escherichia coli enterotoxigénica; fimbria; Minca; medio mínimo; CFA.
Nevoid Basal Cell Carcinoma Syndrome (1966)

Nevoid basal cell carcinomas were found to have their origin in the epidermis and the upper part of the hair follicle. The early epitheliomatous proliferations from the epidermis and the early structure of these tumors were found to be similar to those described for the nonnevoid basal cell carcinomas. The pits of the hands apparently represent a localized retardation of the maturation process of the basal cells. The histologic features of an epithelial cyst from the palm, of ectopic calcium deposition of the cutis, and the electron microscopic views of the tumor cell masses are described.
Toward Self-Healing Actuators: A Preliminary Concept (2016)

Natural organisms have a unique property not yet available in robotics, i.e., a self-healing (SH) ability. This powerful biological healing function has inspired chemists to impart similar properties to synthetic materials to create “SH materials.” Recent developments in SH polymers led us to investigate the potential of using these materials in robotics. This paper presents an innovative approach of using SH polymers, based on the reversible Diels-Alder (DA) reaction, in a compliant actuator. Using DA polymers, a sacrificial SH mechanical fuse (SH-MF) is designed, developed, and validated by placing it in a cable-driven robotic system. The fuse is designed as weakest element and will sacrificially fail if a damaging overload occurs, protecting the compliant element and other components of the system. The experimental results showed that this SH-MF could be healed at a relatively low temperature, recovering the initial mechanical properties. This first working prototype indicates the feasibility to use SH materials in robotics. “SH robotics” will lead to more sustainable and lighter systems, and eventually to more efficient designs.
Whispering-Gallery Mode Lasing in Perovskite Nanocrystals Chemically Bound to Silicon Dioxide Microspheres (2020)

Cesium lead halide perovskite nanocrystals exhibit high photoluminescence quantum efficiencies and tunability across the visible spectrum. This makes these crystals ideal candidates for solar panels, light-emitting diodes, lasers, and especially nanolasers. Due to the versatility of cation substitution in perovskite nanocrystals, they can be grown on amine-functionalized silicon dioxide nanoparticles, where the amine linker replaces the standard cation structure. Selectively growing luminescent nanocrystals on spherical silicon dioxide microspheres results in the opportunity to populate whispering-gallery modes in these spherical silica microspheres. In this case, the nanocrystal halide composition can be used to selectively tune the emission wavelength mode, and microsphere radius to tune the mode spacing. This silicon dioxide attachment also adds to the overall stability of the system. Through photoluminescence microscopy measurements, we show whispering gallery modes in individual perovskite-coated microspheres for CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> nanocrystals on 9.2 μm diameter silica spheres and compare these to theoretically predicted optical modes. In CsPbBr<sub>3</sub>, we provide evidence that these modes will lase under optical excitation, with a threshold of 750 μJ/cm<sup>2</sup>. This study presents a novel system that, through optimization, could be a promising pathway to achieve facile and stable perovskite nanolasers.
Identification of Lamination Stack Properties: Application to High-Speed Induction Motors (2009)

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In order to predict the lateral rotordynamics of a high-speed induction motor, an optimization procedure is used for identifying the dynamic behavior of the magnetic core made of a lamination stack, tie rods, and short-circuit rods. Modal parameters predicted by a finite-element model based on beam elements and measured on induction motors are included in modal error functions contained in a functional. The minimization of this functional by using the Levenberg–Marquardt algorithm permits extracting the equivalent constitutive properties of the lamination stack for several rotors of different sizes. Finally, the size effect on the constitutive properties identified is discussed. </para>
Effects of enhanced chromatic nonlinearity during the AGS γ/sub t/-jump (2002)

The /spl gamma//sub t/-jump designed to reduce the bunch self-field mismatch and intensity loss during the AGS transition crossing can cause significant orbit and lattice distortions and dramatically enhance chromatic nonlinear effects. Employing a low-intensity, small emittance proton bunch crossing transition with the /spl gamma//sub t/-jump quadrupoles excited, we found that the nonlinear momentum-compaction factor /spl alpha//sub 1/ increases from 2.2 to about 90 in the presence of the /spl gamma//sub t/-jump. On the other hand, this enhancement can be effectively suppressed by properly exciting the chromaticity sextupoles, reducing /spl alpha//sub 1/ from 90 to 16. The experimental measurement agrees well with computer simulations using MAD and TIBETAN.