gebhart/patrepeval huggingface dataset:
FRCAPE: Frequency Re-configurable Co-planar Antenna Using Parasitic Elements (2020)

The ever-increasing numbers of new wireless technologies and services have resulted in increasing demand of smart wireless devices. The smart antennas in such devices should support all the required specifications so that these are compatible with different applications. Moreover, for realizing emerging wireless application such as cognitive radios, new requirements on the antenna are imposed. Novel antenna solutions which can easily reconfigure its operating parameter like frequency, bandwidth, pattern or polarization are required to support multiband, multimode and multi standard applications. Such antennas must support all these features in a single unit to produce small size, low cost, low profile integrated antenna which can be easily incorporated into the feature-rich applications. This paper deals with the design, simulation and fabrication of frequency reconfigurable antenna which have more than one reconfiguration features. In these we are adding extended parasitic elements to the Co-planar mono pole antenna for more than one resonant frequency. Co-planar waveguide fed polarization reconfigurable monopole antenna is used and PIN diodes are used as the switching device. The relevant design techniques, simulation results and fabrication details are presented. The integrated antenna structures need to be experimentally tested to validate the established parameters for antenna performance such as return loss, radiation pattern and gain.
Quantitative iTRAQ Secretome Analysis of Aspergillus niger Reveals Novel Hydrolytic Enzymes (2010)

The natural lifestyle of Aspergillus niger made them more effective secretors of hydrolytic proteins and becomes critical when this species were exploited as hosts for the commercial secretion of heterologous proteins. The protein secretion profile of A. niger and its mutant at different pH was explored using iTRAQ-based quantitative proteomics approach coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS). This study characterized 102 highly confident unique proteins in the secretome with zero false discovery rate based on decoy strategy. The iTRAQ technique identified and relatively quantified many hydrolyzing enzymes such as cellulases, hemicellulases, glycoside hydrolases, proteases, peroxidases, and protein translocating transporter proteins during fermentation. The enzymes have potential application in lignocellulosic biomass hydrolysis for biofuel production, for example, the cellulolytic and hemicellulolytic enzymes glucan 1,4-alpha-glucosidase, alpha-glucosidase C, endoglucanase, alpha l-arabinofuranosidase, beta-mannosidase, glycosyl hydrolase; proteases such as tripeptidyl-peptidase, aspergillopepsin, and other enzymes including cytochrome c oxidase, cytochrome c oxidase, glucose oxidase were highly expressed in A. niger and its mutant secretion. In addition, specific enzyme production can be stimulated by controlling pH of the culture medium. Our results showed comprehensive unique secretory protein profile of A. niger, its regulation at different pH, and the potential application of iTRAQ-based quantitative proteomics for the microbial secretome analysis.
<title>Damped harmonics and polynomial phase signals</title> (1994)

The concern here is of retrieving damped harmonics and polynomial phase signals in the presence of additive noise. The damping function is not limited to the exponential model, and in certain cases, the additive noise does not have to be white. Three classes of algorithms are presented, namely DFT based, Kumaresan-Tufts type extensions, and subspace variants including the MUSIC algorithm. Preference should be based on the available data length and frequency separations. In addition, retrieval of self coupled damped harmonics, which may be present when nonlinearities exist in physical systems, is investigated. Simulation examples illustrate main points of the paper.
Conditions for target recovery in spatial compressive sensing for MIMO radar (2013)

We study compressive sensing in the spatial domain for target localization in terms of direction of arrival (DOA), using multiple-input multiple-output (MIMO) radar. A sparse localization framework is proposed for a MIMO array in which transmit/receive elements are placed at random. This allows to dramatically reduce the number of elements, while still attaining performance comparable to that of a filled (Nyquist) array. Leveraging properties of a (structured) random measurement matrix, we develop a novel bound on the coherence of the measurement matrix, and we obtain conditions under which the measurement matrix satisfies the so-called isotropy property. The coherence and isotropy concepts are used to establish respectively uniform and non-uniform recovery guarantees for target localization using spatial compressive sensing. In particular, nonuniform recovery is guaranteed if the number of degrees of freedom (the product of the number of transmit and receive elements MN) scales with K(log G) <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , where K is the number of targets, and G is proportional to the array aperture and determines the angle resolution. The significance of the logarithmic dependence in G is that the proposed framework enables high resolution with a small number of MIMO radar elements. This is in contrast with a filled virtualMIMO array where the product MN scales linearly with G.
Loss of basic fibroblast growth factor in substantia nigra neurons in Parkinson's disease (1993)

Basic fibroblast growth factor (bFGF) has a neurotrophic effect on mesencephalic dopaminergic neurons in vitro and in vivo. To explore whether an abnormality in bFGF expression occurs in Parkinson's disease (PD), we examined the substantia nigra (SN) of six PD and eight control cases immunohistochemically using a monoclonal antibody to bFGF. The mean number of melanin-positive neurons in sections of PD SN was 30.3% of the control mean, but the number of bFGF-immunopositive neurons was only 4.7% of the control mean. bFGF-immunoreactivity was present in only 8.2% of PD, but in 93.7% of control melanin-positive neurons. These results suggest a profound depletion of bFGF in surviving dopaminergic neurons of the SN in PD, and this depletion may be related to the disease process.
Artificial activation of porcine oocytes matured in vitro (1991)

These studies were undertaken to understand the biological basis of artificially induced activation of meiotic metaphase II oocytes and to develop a source of oocytes as recipients for cloning by nuclear transfer. In vitro matured porcine oocytes were pulsed with various voltages of electricity and evaluated for pronuclear formation. The percentage of eggs that activated was significantly greater for the higher voltages. The effect on activation of the temperature of the ovaries returning from the abattoir was evaluated and it was found that oocytes derived from ovaries returning at 29 degrees C activated at lower rates (45.5%) than those returning at 36 degrees C (78.9%). An experiment was designed to evaluate the pH of electroporation medium (EM) and the duration of exposure to EM on activation. Oocytes were placed in EM at various pHs for 5 minutes, pulsed, and immediately removed to TL-Hepes or allowed an additional 2 minutes in EM prior to rinsing in TL-Hepes. The results indicate an optimum activation rate at a pH of 7.0 and allowing the additional 2 minutes in EM. Additional glucosamine (5 mM) had no affect on development of the oocyte to metaphase but reduced the percent pronuclear formation from 61% and 47%. A final experiment evaluated the developmental competence of oocytes subjected to a optimum combination of the above treatments and illustrated that a significant portion of the activated oocytes can show limited signs of cleavage. Thus in vitro matured pig oocytes can be induced to activate at high rates.
Surface Modification and Reinforcement of Silica Aerogels Using Polyhedral Oligomeric Silsesquioxanes (2012)

This study evaluated polyhedral oligomeric silsesquioxane (POSS) molecules as useful, multifunctional reinforcing agents of silica aerogels. Silica aerogels have low-density and high surface area, although their durability is often compromised by the inherent fragility and strong moisture absorption behavior of the silica networks. POSS molecules carrying phenyl, iso-butyl, and cyclohexyl organic side groups, and several Si-OH functionalities were incorporated into silica networks via reactions between Si-OH functionalities in POSS molecules and silanes. Solid state (13)C and (29)Si NMR spectra established that greater than 90% of POSS molecules grafted onto silica networks and led to an increase in fractal dimensions. An almost 6-fold increase in compressive modulus was achieved with less than 5 wt % trisilanol phenyl POSS, and a 50-fold decrease in polarity with negligible changes in density were seen in aerogels modified with less than 5 wt % trisilanol isobutyl POSS.
ChemInform Abstract: Backbone Stabilized Peptidomimetics Containing Statine‐Like Structural Elements: Diastereospecific Synthesis of Trisubstituted Cyclic Ureas and 1,4‐Diazepan‐2‐ones. (2000)

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.
Transcriptomic Studies of the Airway Field of Injury Associated with Smoking-Related Lung Disease (2011)

The "field of injury" hypothesis proposes that exposure to an inhaled insult such as cigarette smoke elicits a common molecular response throughout the respiratory tract. This response can therefore be quantified in any airway tissue, including readily accessible epithelial cells in the bronchus, nose, and mouth. High-throughput technologies, such as whole-genome gene expression microarrays, can be employed to catalog the physiological consequences of such exposures in the airway epithelium. Pulmonary diseases such as chronic obstructive pulmonary disease, lung cancer, and asthma are also thought to be associated with a field of injury, and in patients with these diseases, airway epithelial cells can be a useful surrogate for diseased tissue that is often difficult to obtain. Global measurement of mRNA and microRNA expression in these cells can provide useful information about the molecular pathogenesis of such diseases and may be useful for diagnosis and for predicting prognosis and response to therapy. In this review, our aim is to summarize the history and state of the art of such "transcriptomic" studies in the human airway epithelium, especially in smoking and smoking-related lung diseases, and to highlight future directions for this field.
A robust low phase noise and wide tuning range Ku band sub-integer frequency synthesizer for E-band backhaul transceivers (2015)

This paper presents a Ku band sub-integer frequency synthesizer designed in IBM 0.13um SiGe BiCMOS8hp for E-band backhaul transceivers. To improve phase noise a Gm boosted Colpitts topology was used together with a 4 bit capacitor bank for wide tuning range. Utilizing a sub-integer phase rotating divider the synthesizer realizes 132 channels with a 27.78 MHz resolution, covering 15.583 - 19.11 when using a 55.56 MHz reference. Phase noise is lower than -133 dBc/Hz at 10MHz offset, while reference and sub-integer spurs are lower than -56dBc. The synthesizer is robust to temperature variation within -400C to 85°C.
Signal Relation-Based Physical Layer Authentication (2020)

Most physical-layer authentication techniques use channel information to prevent spoofing attacks. In such techniques, one must estimate the channel information for each authentication procedure. However, when the number of pilots decreases, authentication accuracy also decreases due to low channel estimation quality. This paper proposes a novel signal relation-based authentication method that relies on the detection of received signal symbols and does not require the estimation of channel information in the testing stage. It is noteworthy that the authentication performance of the proposed scheme remains in a good level. We develop two different solutions for the detection of received signal symbols, namely, minimum mean-square error and long short-term memory. Extensive simulation results show the main insights of the proposed signal relation-based authentication method compared to conventional channel-based authentication method.
Online event clustering in temporal dimension (2014)

This work is motivated by a real-life application that exploits sensor data available from traffic light control systems currently deployed in many cities around the world. Each sensor consists of an induction loop that generates a stream of events triggered whenever a metallic object e.g. car, bus, or a bicycle, is detected above the sensor. Because of the red phase of traffic lights objects are usually divided into groups that move together. Detecting these groups of objects as long as they pass through the sensor is useful for estimating the status of the toad networks such as car queue length or detecting traffic anomalies. In this work, given a data stream that contains observations of an event, e.g. detection of a moving object, together with the timestamps indicating when the events happen, we study the problem that clusters the events together in real-time based on the proximity of the event's occurrence time. We propose an efficient real-time algorithm that scales up to the large data streams extracted from thousands of sensors in the city of London. Moreover, our algorithm is better than the baseline algorithms in terms of clustering accuracy. We demonstrate motivations of the work by showing a real-life use-case in which clustering results are used for estimating the car queue lengths on the road and detecting traffic anomalies.
An Industry and Government Perspective on Challenges and Open Problems in Signal Processing [SP Forum] (2019)

The majority of ICASSP presentations are given by professors and students. Perhaps resulting from its strategic location near a great deal of high-technology activity, the strong economy [the result of a focus on machine learning (ML) and in employment therein] and because of the energetic outreach by the organizing committee, ICASSP 2018 had an especially strong industry presence, both in attendance and sponsorship. Calgary, a cosmopolitan city in the Canadian province of Alberta, was the conference's site and provided the perfect opportunity for a panel focused on industry feedback. What spurs the interests of both industry and government, the entities who are actually making the products and know the competition? How can academia participate (and maybe even help)?
A Broadband 1-to-<formula formulatype="inline"> <tex Notation="TeX">$N$</tex></formula> Power Divider/Combiner With Isolation and Reflection Cancellation (2015)

A novel 1-to- N broadband “ iπ-wave” power divider/combiner with reflection cancellation is presented and demonstrated. The new iπ-wave structure provides reflection cancellation and output port isolation with 1-to- N (arbitrary N) signal splitting or N-to-1 summing. It has low loss due to its use of low-impedance transmission lines and provides a relative bandwidth of 50%-200%. The concept is studied theoretically and demonstrated experimentally with several 1-to-4 dividers. The divider/combiner pair provides power amplifiers with broadband operation and well-matched input/output impedances. The concept can be implemented in hybrid circuits or monolithic microwave integrated circuits (MMICs).
Aliphatic Ether Bond Formation Expands the Scope of Radical SAM Enzymes in Natural Product Biosynthesis (2019)

The biosynthetic pathways of microbial natural products provide a rich source of novel enzyme-catalyzed transformations. Using a new bioinformatic search strategy, we recently identified an abundance of gene clusters for ribosomally synthesized and post-translationally modified peptides (RiPPs) that contain at least one radical <i>S</i>-adenosylmethionine (RaS) metalloenzyme and are regulated by quorum sensing. In the present study, we characterize a RaS enzyme from one such RiPP gene cluster and find that it installs an aliphatic ether cross-link at an unactivated carbon center, linking the oxygen of a Thr side chain to the α-carbon of a Gln residue. This reaction marks the first ether cross-link installed by a RaS enzyme. Additionally, it leads to a new heterocyclization motif and underlines the utility of our bioinformatics approach in finding new families of RiPP modifications.
Evaluation, Refurbishment, and Characterization of Fast Neutron Scintillators for the TREAT Fuel Motion Monitoring System (2018)

This paper details work being performed at the Idaho National Laboratory (INL) to evaluate, refurbish, and characterize proton-recoil scintillation (PRS) detectors utilized in a 360 channel array for the measurement of fast neutrons in a standalone system historically called a hodoscope located in the Transient Reactor Test Facility (TREAT). The TREAT hodoscope serves as the primary Fuel Motion Monitoring System for documenting real time fuel displacement during transient experiments. The detectors in the hodoscope have stood dormant for over 20 years and significant degradation must be addressed before the system can be brought back to operational status. The refurbishment process begins by decoupling the PRS from their matched photo multiplier tubes (PMTs) and treating the PRS with ethanol. This process cleans the surfaces, removing paint and legacy labels/ markings. During this procedure many physical variations can be observed. After cleaning, the PRS are physically measured using a digital caliper and the dimensions documented. Following this, a well-controlled 280nm LED light source is used to stimulate the PRS to produce an emission spectrum inside an integration sphere. This emission spectrum is then measured using a UV enhanced optical spectrometer. Spectral measurements are recorded from 185 nm to 580 nm in 0.4 nm steps. The PRS are then lightly sanded on the non-PMT mating surfaces and painted with commercially available reflective paint. A final emission spectrum is recorded for each PRS after painting.
ChemInform Abstract: Titanium(IV)‐Promoted Regioselective Nucleophilic Ring‐Opening Reaction of Chiral Epoxyallyl Alcohols with Acids as a Tool for Ready Access to Chiral 1,2,3‐Triol Monoesters: Application to Stereoselective Total Synthesis of Macrolides. (2012)

Abstract Ring closing metathesis of the protected 1,2,3‐trol monoesters (Vb) and (VIII) provides a short route to natural macrolides like herbarumin I (V) and II (IX).
Fundamental study of the oxidation of butane over vanadyl pyrophosphate (1985)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFundamental study of the oxidation of butane over vanadyl pyrophosphateMarc A. Pepera, James L. Callahan, Michael J. Desmond, Ernest C. Milberger, Patricia R. Blum, and Noel J. BremerCite this: J. Am. Chem. Soc. 1985, 107, 17, 4883–4892Publication Date (Print):August 1, 1985Publication History Published online1 May 2002Published inissue 1 August 1985https://pubs.acs.org/doi/10.1021/ja00303a012https://doi.org/10.1021/ja00303a012research-articleACS PublicationsRequest reuse permissionsArticle Views389Altmetric-Citations156LEARN 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
Broadening broadband: New PON applications and the ETSI Fixed 5th Generation (F5G) project (2022)

Given the widespread success of PON, attention has turned to finding new uses for this very popular technology. This paper explores several of these applications and discusses the related work of the ETSI F5G project.
Lateral Control Of Front-wheel-steering Rubber-tire Vehicles (1990)

In this paper, two models were developed to describe the lateral dynamics of a vehicle for different purposes. The lateral feedback and feedforward controllers are designed to satisfy the above objective based on a linearized model, which includes only the lateral and yaw motions. The performance of the controllers is evaluated on a complex model, which includes motions in all six directions (longitudinal, lateral, vertical, roll, pitch and yaw). It has been validated by numerical simulations that the responses of the complex model and the simplified model remain close to each other when the steering is not too abrupt.
Vicinal Diketone Formation in Yogurt:  13C Precursors and Effect of Branched-Chain Amino Acids (2000)

Addition of branched-chain amino acids (BCAA) or an inhibitor of the BCAA biochemical pathways during fermentation of milk with a lac(-) mutant of Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus strongly influenced the formation of two aroma-impact compounds, 2,3-butanedione and 2,3-pentanedione, as well as their direct precursors 2-acetolactate and 2-acetohydroxybutyrate. This suggests a connection between vicinal diketone formation and BCAA biosynthesis in yogurt bacteria. A recently developed static-and-trapped headspace technique combined with gas chromatography-mass spectrometry demonstrated incorporation of (13)C from [U-(13)C(6)]-D-glucose and [U-(13)C(4)]-L-threonine into both vicinal diketones. For 2,3-butanedione, glucose is the major precursor via pyruvate and activated acetaldehyde. For 2, 3-pentanedione, L-threonine is a precursor via 2-ketobutyrate, but glucose is the major contributor via activated acetaldehyde and, possibly, also via 2-ketobutyrate, which is a degradation product of 3-methylaspartate, an intermediate in glutamate synthesis.