gebhart/patrepeval huggingface dataset:
Depth assisted visual tracking (2009)

We propose a depth assisted video object tracking algorithm that utilizes stereo vision technique to detect and handle various types of occlusions. The foreground objects are detected by using a depth and motion-based segmentation method. The occlusion detection error caused by inaccurate motion vectors is avoided by combining the depth segmentation results with the previous occlusion status of each track. According to the occlusion analysis results, different object correspondence algorithms are employed to track objects under various occlusions. The proposed severe and complete occlusion handling method does not have assumptions of constant movement and limited maximum duration. Experimental results demonstrate that the proposed system can accurately track multiple objects in complex scene under different occlusions.
A finite element study of the stress and strain fields of InAs quantum dots embedded in GaAs (2002)

10.1088/0268-1242/17/6/323
On the Rice model of noise in FM receivers (1988)

The so-called click-and-Gaussian-noise model for the output of a limiter-discriminator receiver for frequency-modulated signals, first proposed by S.O. Rice in 1963, is reviewed. A short survey is presented of the subsequent research that it generated and of some practical applications that it motivated. A more detailed analysis of parameters encountered in the Rice model is carried out with emphasis on their pertinence to click detection. These results are applied to the understanding of the limitations and to the interpretation of the performance of several noise threshold extension techniques for analog modulations and of error reduction techniques for digital modulations that depend on click detection and elimination.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
SILVER helps assign peptides to tandem mass spectra using intensity-based scoring (2004)

Tandem mass spectrometry is commonly used to identify peptides (and thereby proteins) that are present in complex mixtures. Peptide identification from tandem mass spectra is partially automated, but still requires human curation to resolve “borderline” peptide-spectrum matches (PSMs). SILVER is web-based software that assists manual curation of tandem mass spectra, using a recently developed intensity-based machine-learning approach to scoring PSMs, Elias et al. [4]. In this method, a large training set of peptide, fragment, and peak-intensity properties for both matched and mismatched PSMs was used to develop a score measuring consistency between each predicted fragment ion of a candidate peptide and its corresponding observed spectral peak intensity. The SILVER interface provides a visual representation of match quality between each candidate fragment ion and the observed spectrum, thereby expediting manual curation of tandem mass spectra. SILVER is available online at http://llama.med.harvard.edu/Software.html.
New Approaches For The Synthesis Of Biodegradable Polymers (2012)

The development of the field of polymer science and the rise of plastics as ubiquitous materials in almost every aspect of our daily lives is one of the defining scientific achievements of the 20th Century. Ironically, concerns with disposal of the ever-increasing amounts of plastics as well as uncertainty surrounding the future of petroleum-based chemical feedstocks have led 21st Century scientists to investigate alternatives to these very same materials. Biodegradable polymers represent a way to continue the use of plastics in many applications without concerns about long-term accumulation. Additionally, biodegradable polymers offer many properties not found in traditional polymers, most notably their compatibility with biological systems, allowing them to act as ideal materials for biomedical research. This work focuses on new and efficient syntheses of biodegradable polymers, particularly through the use of catalysis. First, the synthesis of biodegradable cyclic polyketals was investigated in the hopes of generating high molecular weight materials. Polyacetals and polyketals are interesting alternatives to more established polyester-based biodegradable polymers in that they do not degrade to acidic species upon hydrolysis. Additionally, because polyketals are stable at neutral pH, but degrade quickly under mild acidic conditions, they are able to act as pH-sensitive materials. However, their syntheses are typically complicated and result in low molecular weight polymers, limiting their utility. Through the Lewis acid catalyzed intramolecular cyclization of epoxide-ketones, strained bicyclic ketals were generated that act as monomers for cationic polymerization. This methodology allowed the synthesis of polyketals with exceptionally high molecular weights. In addition to the study of ketal-based polymers, biodegradable polyesters were investigated. The synthesis of a new class of carboxylic acid-containing polyesters was developed via the self-condensation ring-opening polymerization of anhydridealcohols. These anhydride-alcohol monomers may be produced from catalytic carbonylation of epoxides, allowing a number of backbone functionalities to be generated for the tuning of properties. Polyhydroxyalkanoates, a well known class of biodegradable polyesters, were investigated through both the creation of new carbonylation catalysts for efficient synthesis of their !-lactone monomers as well as the creation of new catalysts for controlled !-lactone ring-opening polymerizations. Finally, unrelated to polymerization, the use of carbonylation for the catalytic synthesis of interesting materials.
A "power-mapping" variable-speed control technique for a constant-frequency conversion system powered by a IC engine and PM generator (2002)

A variable-speed power conversion system is considered where a permanent magnet generator (PMG) driven by an IC engine supplies power to an electronic inverter. The AC voltage from the PMG is typically diode-rectified into a DC link, which is utilized by the inverter to produce constant-frequency, constant-voltage output. These "electronic gensets" can be smaller, lighter and have higher performance than their fixed-speed counterparts with synchronous alternators under field control. Such attributes are attractive for mobile and stand-by power applications. The added flexibility of a variable-speed genset system must be met with suitable techniques for directing the speed at which the engine should operate for a given electrical load. Constraints on torque, speed, and DC link voltage must additionally be met. This paper reviews conventional methods, and presents a new technique utilizing the operating power of the system as an input to a power-speed "map" for the system to follow. Experimental results are included.
Micromachined circuits for millimeter- and sub-millimeter-wave applications (1993)

Two approaches for the development of micromachined circuits for millimeter- and submillimeter-wave applications are discussed. These technologies provide a means to overcome the drawbacks typically associated with conventional planar transmission lines, such as microstrip and coplanar waveguides. Examples demonstrating the use of micromachining to effectively incorporate a third dimension into the geometry of monolithic circuits are presented. This introduces additional parameters in the design and results in structures with superior electrical performance, such as membrane-supported circuits, and reduced volume and weight, such as micromachined-shielded circuits. Micromachined circuits which incorporate miniaturized shielding packages in a monolithic design are described. The performance of these circuits shows that the low-volume, low-weight packaging is effective in reducing signal loss, without degrading the desired frequency response.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Impact of clutters on quality of service in mobile communication using walfisch-ikegami propagation model (2005)

The management of quality of service in communication network systems, particularly to support multimedia applications, includes service requirements, hardware implementation, propagation path loss and system requirements. The signal attenuation between multiple mobile stations and base stations affected by various free space path loss, zones of poor coverage, dropouts, effects of multi-path reception, fading due to parameters like vegetation, rain, and snowfall deteriorates the strength of signals. An attempt has been made to modify the Walfisch-Ikegami model of propagation path loss model by adding the effect of vegetation, sea, rain and snowfall. A simulation has been carried out. The impact of these parameters on the quality of service is presented.
Microanalytical azomethine‐H method for boron determination in plant tissue (1982)

Abstract A microanalytical technique for boron determination using the azomethine‐H reagent was developed. The effects of sample size, extractant and extracting conditions were tested. The technique is quite sensitive to minute amounts of B with a minimum threshold of 05 ppm B. Determinations of B in orchard leaves, NBS reference material No. 1571, agreed with the certified value of 33 ± 3 ppm B, routinely producing a 3% coefficient of variation. The most efficacious procedure resulted from dry ashing a 20 mg oven‐dried sample at 500°C and extracting in 200 μl 1.0N sulfuric acid for 1 hr at 20°C. Key words: Boron determinationmicrotechniqueplant tissueazomethine‐H
New Test to Quantify Lipid Layer Behavior in Healthy Subjects and Patients With Keratoconjunctivitis Sicca (2008)

The DLIP is a new test that can be used in clinical practice to quantify tear film lipid layer behavior and to diagnose dry eye.
A Novel Transient Fault Injection Methodology Based on STE Model Checking (2008)

Deguelin exhibits chemopreventive properties in animal carcinogenesis models. The mechanism underpinning the chemopreventive effects of deguelin has not been fully elucidated. However, it has been suggested that this agent reduces ornithine decarboxylase activity, and perhaps the activity of other signaling intermediates associated with tumorigenesis, by inhibiting mitochondrial bioenergetics. We sought to determine if deguelin could trigger apoptosis by inhibiting mitochondrial bioenergetics. Therefore, we compared and contrasted the effects of deguelin on cells from two human cutaneous squamous cell carcinoma cell lines (parental cells) and their respiration-deficient clones lacking mitochondrial DNA (rho0). While deguelin promoted marked apoptosis in the parental cells in a dose- and time-dependent manner, it failed to do so in the rho0 clones. Furthermore, short-term exposure to deguelin diminished oxygen consumption by the parental cells and promoted mitochondrial permeability transition as evidenced by the dissipation of mitochondrial inner transmembrane potential, reactive oxygen species production, cardiolipin peroxidation, caspase activation, and mitochondrial swelling. Mitochondrial permeability transition was not observed in the rho0 clones exposed to deguelin. These results demonstrate that deguelin induces apoptosis in skin cancer cells by inhibiting mitochondrial bioenergetics and provide a novel mechanism for the putative anticancer activity of this agent.
The origin of x-ray luminescence from CdTe nanoparticles in CdTe∕BaFBr:Eu2+ nanocomposite phosphors (2006)

X-ray luminescence from CdTe nanoparticles is observed when CdTe nanoparticles are encapsulated into BaFBr:Eu2+ phosphors. In contrast, negligible x-ray luminescence is observed from the unencapsulated nanoparticles, either in solution or in solid form. The origin of the x-ray luminescence is attributed to the effective energy transfer from Eu2+ ions to CdTe nanoparticles in the nanocomposite materials. The x-ray luminescence of these nanocomposites is dose dependent and the emission wavelength is size adjustable which may allow use as a type of dosimeter for both in vitro and in vivo applications.
Coaxial Three-Layer Nanocables Synthesized by Combining Laser Ablation and Thermal Evaporation (2000)

Coaxial three-layer nanocables consisting of a crystalline silicon core, a silicon oxide interlayer, and a carbon outer sheath (see Figure) have been obtained using a combination of laser ablation and thermal evaporation. These novel multilayer nanostructures, which are interesting candidates for nanoelectronic devices, are characterized using a variety of techniques. A growth mechanism is proposed.
ESTER: an expert system for management of respiratory weaning therapy (1989)

The withdrawal of mechanical ventilation generally presents no problems if carried out when the values of certain predictive physiological variables suggest that the patient will be able to breathe for him or herself. In certain cases, however, a more gradual weaning procedure is necessary, in which the amount of mechanical assistance provided is in some way reduced little by little. One of the usual means of achieving this gradual reduction is by intermittent mandatory ventilation (IMV), in which short bursts of mechanical ventilation are separated by progressively longer periods of "ventilator silence" which stimulate the patient's endogenous respiration. ESTER is an expert system in which the most widely accepted criteria are systematically called upon to supply advice to the clinician who has to prescribe a respiratory therapy regime suited to the needs of the patient. After effecting a preliminary prognosis of the patient's condition, ESTER asks for certain physiological parameters to be keyed in. Analysis of these parameters reveals the patient's condition and allows a recommended respiratory therapy to be designed.
A Fully Integrated Inductor-Based GaN Boost Converter With Self-Generated Switching Signal for Vehicular Applications (2016)

An inductor-based GaN dc-boost converter with self-generated switching signal is proposed to remove power and area consuming gate drivers for toggling a large transistor switch. All the active and passive components are integrated on a 3 mm ×3 mm die using 0.25-μm GaN-on-SiC process. The circuit operates at 680-MHz switching frequency with 0.24 W/mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> power density at 20-V output voltage for vehicular applications with 12-V car battery input.
Randomized preprocessing of configuration space for path planning: articulated robots (2002)

This paper describes the application of a recent approach to path planning for robots with many degrees of freedom (DOF) to articulated robots moving in two or three dimensional static environments. The planning approach, which itself is not restricted to articulated robots, consists of a preprocessing and a planning stage. The preprocessing is done only once for a given environment and generates a connected network of randomly, but properly selected, collision-free configurations (nodes). The planning then connects any given initial and final configurations of the robot to two nodes of the network and computes a path through the network between these two nodes. We show that after paying the preprocessing cost, planning is extremely fast for many difficult examples involving 7-DOF and 12-DOF robots. The approach is particularly attractive for many-DOF robots which have to perform many successive point-to-point motions in the same environment.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Fluorocarbons. The Reaction of Fluorine with Carbon (1939)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorocarbons. The Reaction of Fluorine with CarbonJ. H. Simons and L. P. BlockCite this: J. Am. Chem. Soc. 1939, 61, 10, 2962–2966Publication Date (Print):October 1, 1939Publication History Published online1 May 2002Published inissue 1 October 1939https://pubs.acs.org/doi/10.1021/ja01265a111https://doi.org/10.1021/ja01265a111research-articleACS PublicationsRequest reuse permissionsArticle Views285Altmetric-Citations35LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Synthesis and Reactions of Pyridinium Iodides of Substituted Acetophenones (1971)

The present communication concerns with the synthesis of pyridinium iodides of 2 : 4 dthydroxy-, 2 : 5 dihydroxy-, 2-hydroxy-5-methyl-, 2 hydroxy-5-ehloro-, 2-hydroxy-5-bromo-, 2-hydroxy-4-methyl-5- chloro-, 2-hydroxy-3-bromo-5-chloro-, 2-hydroxy-3-chloro-5-bromo-, 2-hydrexy-4-methyl 5-bromo-, 2- hydroxy-3 5-dibroino , 2-bromo-4-nitro-, <em>\(p\) </em>nitro acetophenones and naphthyl methylketone.
Augmented Reality Application to Support Remote Maintenance as a Service in the Robotics Industry (2017)

Maintenance of manufactured products is among the most common services in industry and its cost often exceed 30% of the operating costs. Modern manufacturing companies are shifting their focus from products to combined ecosystem of Products- Service Systems (PSS). Towards that end, the main objective of this work is to develop a cloud-based service-oriented system that implements AR technology for remote maintenance by enabling cooperation between the on- spot technician and the manufacturer. The proposed system includes the methods for the record of the malfunction by the end user, the actions required by the expert so as to provide instructions in an Augmented Reality application for maintenance, as well as the cloud- based platform that will allow their communication and the exchange of information. In addition to the above, the proposed system consists of smart assembly/disassembly algorithms for automated generation of assembly sequences and AR scenes and improved interface, aiming to maximize existing knowledge usage while creating vivid AR service instructions. The proposed system is validated in a real-life case study following the requirements of a robotics SME.
Macromol. Chem. Phys. 8/2014 (2014)

Front Cover: Zinc metal coordination of a 9H-carbazole bearing terpyridines at the 3- and 6-positions produces a pentamer that shows excitation-wavelength-dependent emission in solution, and order in the solid state due to H-bonding. Complexation of the corresponding 9-alkylcarbazole derivatives produces a mixture of oligomers with a totally different behavior. Further details can be found in the article by Y. Gao, T. He, P. Hu, T. M. Koh, H. Sun, and A. C. Grimsdale* on page 753.
Isolation of<sup>137</sup>Cs with<i>Copper Ferrocyanide-Anion Exchange Resin</i> (1967)

The adsorption and desorption of 137Cs on copper ferrocyanide-anion exchange resin, prepared in the manner previously reported in this Journal in a Short Note, are presented in detail. This resin can also be used for the concentration of the 137Cs found in sea water. The nuclide is adsorbed effectively on the resin from water, hydrochloric acid below 4 M, and on nitric acid below 1M. After adsorpsion on the resin, 137Cs is eluted easily with either nitric acid (>6M), ammonium water, or silver nitrate solution. Adsorption on the resin is specific for 137Cs, and the action is due entirely to the ferrocyanide moiety of the resin. This method is more efficient than the co-precipitation method with copper ferrocyanide for the concentration of radiocesium from a large volume of sea water.
Absorption and Emission Spectra of Anthracene Dimers (1966)

The preparation of two types of anthracene dimer is described and their absorption and fluorescence spectra are reported. The basic spectral features of each dimer, together with a consideration of the method of formation, enable us to assign a geometry to each pair. One dimer, prepared by photolytic dissociation of dianthracene, has a symmetrical sandwich configuration. The geometry of the other dimer, prepared in solution at low temperatures, is deduced from an analysis of the vibronic structure of its first absorption band (1A1g→1B2u transition of a single molecule) using the theory of vibronic coupling in dimers. The two molecules have a configuration related to that of the two molecules in the unit cell of the crystal; one in which the short in-plane axes make an angle of 55 deg with each other while the long axes are parallel. The resonance splittings of the 1B2u and 1B3u states in each dimer are deduced from the spectra and the results are discussed in relation to the theories of the energy levels of dimers. The fluorescence of the sandwich dimer is of the excimer type while the fluorescence from the other dimer is excited dimer emission with a vibrational intensity distribution different from that in the corresponding monomer spectrum.
Method for the Direct Enantioselective Synthesis of Chiral Primary α-Amino Ketones by Catalytic α-Amination (2018)

A useful catalytic enantioselective approach has been developed for the synthesis of chiral ketamine analogs using Rh(II)-catalyzed amination of triisopropylsilyl enol ethers to form α-amino ketones with O-(4-nitrophenyl)hydroxylamine as nitrogen donor in 81-91% ee.
400 V class high-speed current limiting circuit breaker for electric power system (1994)

In Japan, a new network distribution system with advanced protective and operational functions designed to meet the needs of today's information society is being studied. For this new distribution system, the authors have developed high-speed current limiting equipment using gate turn-off thyristors (GTOs), to lower the breaking capacity of switches and to suppress instantaneous voltage drops. The main components of this equipment are a high-speed vacuum switch and a GTO switch connected in parallel. The usual load current is carried by the vacuum switch. In the case of a system fault, the fault current is commutated to and interrupted by the GTO switch by opening the vacuum switch. The time from fault occurrence to current interruption is less than 1 ms. This response time is about 100 times as fast as that of mechanical breakers. This equipment dose not require a large cooling system and is compact compared with conventional solid-state equipment.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Low-crosstalk and compact optical add-drop multiplexer using a multiport circulator and fiber Bragg gratings (2000)

Three kinds of low-crosstalk and compact optical add-drop multiplexers (OADMs) based on a multiport optical circulator (MOC) with fiber Bragg gratings are proposed and demonstrated. For the MOC-based structure, there is a significant intraband crosstalk reduction of about 37 and 16 dB on the dropped and added channels, respectively, for the best proposed MOC-based structure as compared with the conventional structure. Bit-error rate performance and both intraband and interband crosstalk-induced power penalties of these MOC-based OADMs are examined in a 10 Gb/s system demonstration. Such a low-crosstalk, miniaturized, and compact OADM may find important applications in dense wavelength-division multiplexing networks.