gebhart/patrepeval huggingface dataset:
Optimised Meandered Microstrip Feeds for Planar Antenna Arrays (2001)

This paper considers utilization of meandered (serpentine) microstrip lines as feeds in planar multylayer phased array antennas. Nevertheless, that these structures have radiating properties itself and they are used as travelling-wave antennas [1], however, they can be optimized to have predictable performances as antenna feeds in respect of transmitted phase and magnitude. Substantial problems of these lines, the resonance attenuation and phase delay can be avoided with properly chosen resonance Γ-junction length of the serpentines. The paper contains results from numerical optimization of regular and non-regular meandered feeds obtained by MoM-based simulator and compared with measurements in Ku-band. Finally, design rules are formulated for meander parameters that allows of avoiding resonance losses and unpredictable phase delay of antenna feeds in desired frequency range.
Service Virtualization Using a Non-von Neumann Parallel, Distributed, and Scalable Computing Model (2012)

This paper describes a prototype implementing a high degree of transaction resilience in distributed software systems using a non-von Neumann computing model exploiting parallelism in computing nodes. The prototype incorporates fault, configuration, accounting, performance, and security (FCAPS) management using a signaling network overlay and allows the dynamic control of a set of distributed computing elements in a network. Each node is a computing entity endowed with self-management and signaling capabilities to collaborate with similar nodes in a network. The separation of parallel computing and management channels allows the end-to-end transaction management of computing tasks (provided by the autonomous distributed computing elements) to be implemented as network-level FCAPS management. While the new computing model is operating system agnostic, a Linux, Apache, MySQL, PHP/Perl/Python (LAMP) based services architecture is implemented in a prototype to demonstrate end-to-end transaction management with auto-scaling, self-repair, dynamic performance management and distributed transaction security assurance. The implementation is made possible by a non-von Neumann middleware library providing Linux process management through multi-threaded parallel execution of self-management and signaling abstractions. We did not use Hypervisors, Virtual machines, or layers of complex virtualization management systems in implementing this prototype.
Phosphorescent OLEDs with saturated colors (2007)

In this paper, two approaches are demonstrated to narrow phosphorescent OLED (PHOLED) emission lineshapes to increase color saturation while keeping device high efficiency performance, which is critical for large area flat panel displays. One approach uses bottom-emissive microcavity structure in green and blue devices to achieve 22 nm full width half maximum (FWHM) emissions. The other approach is to reduce the natural width of the emission as exemplifying in a red device. A new NTSC red with 64 nm FWHM emission is reported. In a standard device, it has a luminous efficiency of 18.3 cd/A at 10 mA/cm<sup>2</sup>.
A 17 Gbps 156 fJ/bit Two-Channel Optical Receiver With Optical-Input Split and Delay in 65 nm CMOS (2020)

Multi-channel optical receivers clocked at a frequency slower than the data-rate in which different phases are used for each channel are widely used in high data-rate applications. Here, we demonstrate a two-channel optical receiver where both channels share the same clock operating at half of the data-rate frequency. However, instead of using different phases for each channel, the optical input is split and the input to the 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> channel is optically delayed with respect to the 1 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">st</sup> channel. Moreover, to improve performance, the duty cycle of the clock can easily become a design parameter. Each channel consists of only one high-bandwidth gain-improved transimpedance amplifier with a pseudo-differential-output and a comparator with offset-nulling. The receiver is fabricated in 65 nm CMOS. To demonstrate the concept, the fabricated die and two photo-detectors are bonded inside a QFN80 package. Measurement results of the receiver show that each channel can sample the input at 8.5 Gbps, resulting in a 17 Gbps total data rate, with a total energy efficiency of 156 fJ/bit, and an input optical modulation amplitude (OMA) sensitivity of -7 dBm without any equalization.
P19-33. Trafficking of a synthetic vaccine vehicle made of poly(lactic acid) fluorescent nanoparticles, in intestinal mucosa (2009)

DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online for everyone.
Intermediate-band photosensitive device with quantum dots having tunneling barrier embedded in organic matrix (2023)

A plurality of quantum dots each have a shell. The quantum dots are embedded in an organic matrix. At least the quantum dots and the organic matrix are photoconductive semiconductors. The shell of each quantum dot is arranged as a tunneling barrier to require a charge carrier (an electron or a hole) at a base of the tunneling barrier in the organic matrix to perform quantum mechanical tunneling to reach the respective quantum dot. A first quantum state in each quantum dot is between a lowest unoccupied molecular orbital (LUMO) and a highest occupied molecular orbital (HOMO) of the organic matrix. Wave functions of the first quantum state of the plurality of quantum dots may overlap to form an intermediate band.
Conformational Properties of Comb-Like Polyelectrolytes: A Coarse-Grained MD Study (2016)

This article presents a coarse-grained molecular dynamics study of single comb-like polyelectrolyte or ionomer chains in aqueous solution. The model polymer is comprised of a hydrophobic backbone chain with grafted side chains that terminate in anionic headgroups. The comb-polymer is modeled at a coarse-grained level with implicit treatment of the solvent. The computational study rationalizes conformational properties of the backbone chain and localization of counterions as functions of side chain length, grafting density of side chains, backbone stiffness, and counterion valence. The main interplay that determines the ionomer properties unfolds between electrostatic interactions among charged groups, hydrophobic backbone interactions, and steric effects induced by the pendant side chains. Depending on the density of branching sites, we have found two opposing effects of side chain length on the backbone gyration radius and local persistence length. Variation in comb-polyelectrolyte architecture is shown to have nontrivial effects on the localization of mobile counterions. Changes in Bjerrum length and counterion valence are also shown to alter the strength of Coulomb interactions and emphasize the role of excluded-volume effects on controlling the backbone conformational behavior. The results of simulations are in qualitative agreement with existing experimental and theoretical studies. The comprehensive conformational picture provides a framework for future studies of comb-polyelectrolyte systems.
Tankyrase Inhibitors as Therapeutic Targets for Cancer (2014)

Tankyrase 1 and 2 belonging to the family of poly(ADP-ribosyl)ases play an important role in PARsylation by utilizing NAD+ as a substrate in order to generate ADP-ribose polymers. Tankyrases are involved in a number of cellular functions, that includes telomere homeostasis, mitotic spindle formation, vesicle transport linked to glucose metabolism, Wnt/β-catenin signalling, and viral replication. These roles of tankyrases in disease-relevant cellular processes have made them attractive drug targets. Recently, several inhibitors have been identified as potential clinical leads. The current review covers the progress, mechanism and binding modes of recently known Tankyrase inhibitors and discusses the rational approaches that were used to identify the tankyrase inhibitors.
Open Metal−Organic Framework Containing Cuprate Chains (2006)

A three-dimensional Cu(II) metal−organic framework, copper hydroxide &lt;i&gt;p&lt;/i&gt;-pyridinecarboxylate hydrate, [Cu(OH)(C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;NCO&lt;sub&gt;2&lt;/sub&gt;)·H&lt;sub&gt;2&lt;/sub&gt;O], was synthesized by hydrothermally reacting copper nitrate with &lt;i&gt;p&lt;/i&gt;-pyridinecarboxylic acid. The\ncrystals were suitable for single-crystal X-ray diffraction analysis, which showed that the Cu(II) centers adopt a\nslightly distorted square pyramidal geometry. They coordinate to both the pyridyl and carboxylate functionalities of\nthe pyridinecarboxylate bridging ligands. Infinite copper oxide chains run through the structure and are connected\nby &lt;i&gt;p&lt;/i&gt;-pyridinecarboxylate (&lt;i&gt;p&lt;/i&gt;-PyC) ligands. Crystal data: monoclinic, space group &lt;i&gt;P&lt;/i&gt;2&lt;sub&gt;1&lt;/sub&gt;/&lt;i&gt;n&lt;/i&gt;, &lt;i&gt;a&lt;/i&gt; = 3.5521(2) Å, &lt;i&gt;b&lt;/i&gt; =\n15.8665(11) Å, &lt;i&gt;c&lt;/i&gt; = 12.9977(9) Å, β = 95.285(2)°, and &lt;i&gt;Z&lt;/i&gt; = 4. Thermogravimetric analysis (TGA) revealed that\nthe guest H&lt;sub&gt;2&lt;/sub&gt;O molecules in the channels may be removed, and the material is stable to ca. 245 °C. Magnetic\nmeasurements indicated the material has one-dimensional (1D) antiferromagnetic ordering within the Cu&lt;sup&gt;2+&lt;/sup&gt; chains\nwith a Néel temperature of ca. 51 K. Data fitting to the Bonner−Fisher model yielded a coupling constant, &lt;i&gt;J,&lt;/i&gt; of\n−7.3 cm&lt;sup&gt;-1&lt;/sup&gt; and &lt;i&gt;g&lt;/i&gt; factor of 2.15. The Curie tail below 20 K is due to a small amount of paramagnetic impurities,\ncalculated to be ∼0.2% in concentration. Further characterization of crystallinity and morphology are discussed,\nincluding powder X-ray diffraction (PXRD), elemental analysis, and optical microscopy.
Psychophysical Studies of the Binocular Processes of Amblyopes (1983)

It has frequently been assumed that humans with abnormal binocular vision resulting from amblyopia or strabismus lack binocular cortical neurons. From this assumption, it would be predicted that amblyopes would fail to show binocular interactions on any psychophysical tasks. This paper describes some recent psychophysical experiments investigating the binocular processes of amblyopes. The results of these experiments have shown that most humans with abnormal binocular vision fail to show binocular interactions for psychophysical tasks such as stereopsis or binocular summation, but show partially normal binocular interactions for interocular transfer of visual aftereffects and show normal interactions for dichoptic masking with grating stimuli.
Management of Chronic Myeloid Leukemia with BCR/ABL Inhibitors: Current Status and Future Perspectives (2010)

Chronic myeloid leukemia (CML) is a hematopoietic neoplasm characterized by the Philadelphia chromosome (Ph) and the BCR/ABL oncoprotein. In chronic phase (CP) CML, leukemic cells display multilineage differentiation and maturation capacity. The BCR/ABL inhibitor imatinib exerts profound antileukemic effects in these patients and is considered standard frontline therapy. However, not all patients show a long-lasting response to this drug. Rather, resistance to imatinib has been recognized as an emerging clinical problem in CML. While CML stem cells exhibit intrinsic resistance against imatinib and thus survive therapy, one or more stem cell-derived subclones may acquire additional hits over time, so that an overt relapse occurs. A major triggering hit in such subclones are BCR/ABL mutations. For these patients, novel multikinase inhibitors targeting BCR/ABL such as nilotinib, dasatinib, bosutinib, bafetinib, as well as Aurora kinase inhibitors have been developed and shown to exert antileukemic effects in imatinib-resistant CML. In addition, hematopoietic stem cell transplantation (HSCT) remains an important treatment option for drug-resistant patients. The decision concerning second- or third line therapy, selection of drugs, and HSCT, is usually based on the presence and type of BCR/ABL mutation(s), phase of disease, other disease-related factors, and patient-related variables including age and co-morbidity. The current article provides an overview on current diagnostic and therapeutic strategies for patients with drug-naïve and drug-resistant CML.
Veracity radius (2006)

This paper focuses on local computations of distributed aggregation problems on fixed graphs. We define a new metric on problem instances, Veracity Radius (VR), which captures the inherent possibility to compute them locally. We prove that VR yields a tight lower bound on output-stabilization time, i.e., the time until all nodes fix their outputs, as well as a lower bound on quiescence time. We present an efficient aggregation algorithm, I-LEAG, which reaches both output stabilization and quiescence within a time that is proportional to the VR of the problem instance, and is also efficient in terms of per-node communication and memory. We empirically show that the VR metric also effectively captures the performance of previously suggested efficient aggregation protocols, and that I-LEAG significantly outperforms these protocols in several respects.
Vitamin B12 produced by gut bacteria modulates excitatory neurotransmission (2022)

ABSTRACT A growing body of evidence indicates that gut microbiota influence brain function and behavior. However, the molecular basis of how gut bacteria modulate host nervous system function is largely unknown. Here we show that vitamin B12-producing bacteria that colonize the intestine can modulate excitatory synaptic transmission and behavior in the host Caenorhabditis elegans . We find that vitamin B12 reduces cholinergic signaling in the nervous system through rewiring of the methionine (Met)/S-Adenosylmethionine (SAM) cycle in the intestine. We identify a conserved metabolic crosstalk between the Met/SAM cycle and the choline oxidation pathway. We show that metabolic rewiring of these pathways by vitamin B12 reduces cholinergic transmission by limiting the availability of free choline required by neurons to synthesize acetylcholine. Our study reveals a gut-brain communication pathway by which enteric bacteria modulate host behavior and may affect mental health.
Fluorinated Vinylsilanes from the Copper‐Catalyzed Defluorosilylation of Fluoroalkene Feedstocks (2017)

Abstract Herein, a copper‐catalyzed C−F bond defluorosilylation reaction of tetrafluoroethylene and other polyfluoroalkenes is described. Mechanistic studies, based on a series of stoichiometric reactions with copper complexes, revealed that the key steps of this defluorosilylation reaction are 1) the 1,2‐addition of a silylcopper intermediate to the polyfluoroalkene and 2) a subsequent selective β‐fluorine elimination, which generates a Cu−F species. The β‐fluorine elimination is facilitated by Lewis acidic F−Bpin, which is generated in situ during the defluorosilylation.
Efficient Selection of Recombinant Fluorescent Vaccinia Virus Strains and Rapid Virus Titer Determination by Using a Multi-Well Plate Imaging System (2021)

Engineered vaccinia virus (VACV) strains are used extensively as vectors for the development of novel cancer vaccines and cancer therapeutics. In this study, we describe for the first time a high-throughput approach for both fluorescent rVACV generation and rapid viral titer measurement with the multi-well plate imaging system, IncuCyte<sup>®</sup>S3. The isolation of a single, well-defined plaque is critical for the generation of novel recombinant vaccinia virus (rVACV) strains. Unfortunately, current methods of rVACV engineering via plaque isolation are time-consuming and laborious. Here, we present a modified fluorescent viral plaque screening and selection strategy that allows one to generally obtain novel fluorescent rVACV strains in six days, with a minimum of just four days. The standard plaque assay requires chemicals for fixing and staining cells. Manual plaque counting based on visual inspection of the cell culture plates is time-consuming. Here, we developed a fluorescence-based plaque assay for quantifying the vaccinia virus that does not require a cell staining step. This approach is less toxic to researchers and is reproducible; it is thus an improvement over the traditional assay. Lastly, plaque counting by virtue of a fluorescence-based image is very convenient, as it can be performed directly on the computer.
3. The Eighteenth- and Early Nineteenth- Century Evolution of Indian Print Culture and Knowledge Networks in Calcutta and Madras (2016)

3. The Eighteenth- and Early Nineteenth- Century Evolution of Indian Print Culture and Knowledge Networks in Calcutta and Madras was published in Print Culture Histories Beyond the Metropolis on page 88.
Delayed catalyst function enables direct enantioselective conversion of nitriles to NH 2 -amines (2019)

Accessing enantiomerically enriched amines often demands oxidation-state adjustments, protection and deprotection processes, and purification procedures that increase cost and waste, limiting applicability. When diastereomers can be formed, one isomer is attainable. Here, we show that nitriles, largely viewed as insufficiently reactive, can be transformed directly to multifunctional unprotected homoallylic amines by enantioselective addition of a carbon-based nucleophile and diastereodivergent reduction of the resulting ketimine. Successful implementation requires that competing copper-based catalysts be present simultaneously and that the slower-forming and less reactive one engages first. This challenge was addressed by incorporation of a nonproductive side cycle, fueled selectively by inexpensive additives, to delay the function of the more active catalyst. The utility of this approach is highlighted by its application to the efficient preparation of the anticancer agent (+)-tangutorine.
Synchrotron X-ray Diffraction Study of BaFe2As2 and CaFe2As2 at High Pressures up to 56 GPa: Ambient and Low-Temperatures Down to 33 K (2010)

We report high pressure powder synchrotron x-ray diffraction studies on MFe2As2 (M=Ba, Ca) over a range of temperatures and pressures up to about 56 GPa using a membrane diamond anvil cell. A phase transition to a collapsed tetragonal phase is observed in both compounds upon compression. However, at 300 (33) K in the Ba-compound the transition occurs at 26 (29) GPa, which is a much higher pressure than 1.7 (0.3) GPa at 300 (40) K in the Ca-compound, due to its larger volume. It is important to note that the transition in both compounds occurs when they are compressed to almost the same value of the unit cell volume and attain similar ct/at ratios. We also show that the FeAs4 tetrahedra are much less compressible and more distorted in the collapsed tetragonal phase than their nearly regular shape in the ambient pressure phase. We present a detailed analysis of the pressure dependence of the structures as well as equation of states in these important BaFe2As2 and CaFe2As2 compounds.
ChemInform Abstract: Asymmetric Synthesis of the C(10)‐C(16) Segment of the Bryostatins. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.
Thermodynamics of Amorphous Starch−Water Systems. 1. Volume Fluctuations (1998)

This paper presents dilatometric and calorimetric experiments on potato starch extruded into a transparent amorphous glass with a density of 1.5 g/cm3 at room temperature. The specific heat increment at the glass transition is used to estimate the transition temperature of samples containing up to 25 wt % water. The specific volume of the samples is studied between 25 and 165 °C and between 0.1 and 100 MPa. Glass transitions estimated from the compressibility increment at the transition temperature are found in agreement with those detected by calorimetry. In the entire experimental temperature range, a maximal excess volume of mixing is observed at a composition corresponding to three water molecules per anhydroglucose in the mixture. This suggests that the large size difference between the chemical components allows the water molecules to saturate only one hydroxyl group of the anhydroglucose at a time. Specific volumes of starch glasses and melts are superimposed onto a single master curve by a simple empirical relation. The neglect of polar interactions in mean field equations of state results in underestimated internal pressures and cohesive energy densities. Free volumes estimated with the lattice fluid equation of state reflect semiquantitatively the effects of temperature and concentration on the density of starch, which goes through a maximum value at low water concentration. Such a reduction of the free volume of polymer glasses by low plasticizer concentrations is called antiplasticization, as the reduction of the glass transition temperature is then coupled to an increase rather than a decrease of elastic moduli. Antiplasticization reduces gas sorption and permeation rates and the knowledge of its occurrence can be used to optimize the gas barrier properties of polymers.
Applications of Transition Metal Catalysis in Drug Discovery and Development. An Industrial Perspective. Herausgegeben von Matthew L. Crawley und Barry M. Trost. (2013)

John Wiley & Sons, Hoboken, 2012. 376 S., geb., 80.40 €.—ISBN 978-0470631324
Voice activity detection (2007)

article Share on Voice activity detection Authors: Deepti Singh View Profile , Frank Boland View Profile Authors Info & Claims XRDS: Crossroads, The ACM Magazine for StudentsVolume 13Issue 4June 2007 pp 7https://doi.org/10.1145/1315325.1315332Published:01 September 2007Publication History 1citation596DownloadsMetricsTotal Citations1Total Downloads596Last 12 Months7Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my Alerts New Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Diabetic Retinopathy Screening Method Using Adapted Wavelets Decompositions and Template Matching (2009)

International audience
Resolving motion ambiguities (1993)

We address the problem of optical flow reconstruction and in particular the problem of resolving ambiguities near edges. They occur due to (i) the aperture problem and (ii) the occlusion problem, where pixels on both sides of an intensity edge are assigned the same velocity estimates (and confidence). However, these measurements are correct for just one side of the edge (the non occluded one).

Our approach is to introduce an uncertainty field with respect to the estimates and confidence measures. We note that the confidence measures are large at intensity edges and larger at the convex sides of the edges, i.e. inside corners, than at the concave side. We resolve the ambiguities through local interactions via coupled Markov random fields (MRF). The result is the detection of motion for regions of images with large global convexity.
ChemInform Abstract: Stereocontrolled Functionalization of the Diene System of Compactin. (1994)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.