gebhart/patrepeval huggingface dataset:
UPMAC: A localized load-adaptive MAC protocol for underwater acoustic networks (2014)

Unlike terrestrial networks that mainly rely on radio waves for communications, underwater networks utilize acoustic waves, which have comparatively lower loss and longer range in underwater environments. However, acoustic waves incurs long propagation delays that typically lead to low throughput especially in protocols that require receiver feedback such as multimedia stream delivery. In addition, energy cost of transmission underwater is much higher than reception (almost 125:1 [1]). Thus, collision and retransmission should be reduced in order to reduce energy cost and improve throughput Receiver-based protocols, like RIPT and COS-TS, can significantly reduce collision and retransmission. But they are time and energy consuming because nodes are controlled to turn into receiver mode by control packets or a timer regardless of load. In this paper, we propose an underwater practical MAC protocol, called UPMAC. The main objective of UPMAC is to adapt to the network load conditions by providing two modes (high and low load modes) and switching between them based on different offered load. Turn-around time overhead is reduced and it is less vulnerable to control packet corruption, since we reduce the use of control packets by the technique of piggyback. UPMAC provides a low data collision rate in both one-hop and multi-hop situation because we use Receiver-based approach in high load mode. Extensive simulations show that our approach can achieve significantly better performance in both general and Sea Swarm (tree) topologies.
Flexible thin-film battery based on graphene-oxide embedded in solid polymer electrolyte (2015)

Enhanced safety of flexible batteries is an imperative objective due to the intimate interaction of such devices with human organs such as flexible batteries that are integrated with touch-screens or embedded in clothing or space suits. In this study, the fabrication and testing of a high performance thin-film Li-ion battery (LIB) is reported that is both flexible and relatively safer compared to the conventional electrolyte based batteries. The concept is facilitated by the use of solid polymer nanocomposite electrolyte, specifically, composed of polyethylene oxide (PEO) matrix and 1 wt% graphene oxide (GO) nanosheets. The flexible LIB exhibits a high maximum operating voltage of 4.9 V, high capacity of 0.13 mA h cm(-2) and an energy density of 4.8 mW h cm(-3). The battery is encapsulated using a simple lamination method that is economical and scalable. The laminated battery shows robust mechanical flexibility over 6000 bending cycles and excellent electrochemical performance in both flat and bent configurations. Finite element analysis (FEA) of the LIB provides critical insights into the evolution of mechanical stresses during lamination and bending.
On estimation of NBTI-Induced delay degradation (2010)

NBTI, which is one of well-known aging phenomena, brings delay degradation in deep submicron VLSIs. In order to detect NBTI-induced delay faults, we need to estimate delay degradation and apply delay test for the circuit in the field. This paper discusses on estimation of NBTI-Induced delay degradation. We first analyze the effect of the delay degradation, and then give a procedure of path selection in which long paths after the delay degradation are selected for the delay test in the filed. Experimental results show that estimation of delay degradation significantly affects path selection, and accurate estimation is important for the test.
Double-bond isomers of aromatic compounds. 1-Methylene-1,2-dihydronaphthalene (1979)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDouble-bond isomers of aromatic compounds. 1-Methylene-1,2-dihydronaphthaleneLawrence T. Scott and William R. BrunsvoldCite this: J. Org. Chem. 1979, 44, 4, 641Publication Date (Print):February 1, 1979Publication History Published online1 May 2002Published inissue 1 February 1979https://pubs.acs.org/doi/10.1021/jo01318a039https://doi.org/10.1021/jo01318a039research-articleACS PublicationsRequest reuse permissionsArticle Views81Altmetric-Citations15LEARN 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
Generation of optical frequency combs with a short photonics crystal fiber (2014)

Self-seeded four wave mixing (FWM) cascades with a 50 m long photonics crystal fiber (PCF) as the parametric gain medium are presented. Up to six comb lines are successfully generated when the amplifier output power is set at 519.28 mW. That relatively short length of the PCF enables the proposed scheme to be more compact in size in comparison to a 500 m long of highly nonlinear fiber, utilized in previous work.
The ALPINE-ALMA [CII] survey (2020)

We present dust attenuation properties of spectroscopically confirmed star forming galaxies on the main sequence at a redshift of ~4.4-5.8. Our analyses are based on the far infrared continuum observations of 118 galaxies at rest-frame 158μm obtained with the Atacama Large Millimeter Array (ALMA) Large Program to INvestigate [CII] at Early times (ALPINE). We study the connection between the ultraviolet (UV) spectral slope ($β$), stellar mass (M_*), and infrared excess (IRX=L_IR/L_UV). Twenty-three galaxies are individually detected in the continuum at &gt;3.5 sigma significance. We perform a stacking analysis using both detections and nondetections to study the average dust attenuation properties at z~4.4-5.8. The individual detections and stacks show that the IRX-$β$ relation at z~5 is consistent with a steeper dust attenuation curve than typically found at lower redshifts (z&lt;4). The attenuation curve is similar to or even steeper than that of the extinction curve of the Small Magellanic Cloud (SMC). This systematic change of the IRX-$β$ relation as a function of redshift suggests an evolution of dust attenuation properties at z&gt;4. Similarly, we find that our galaxies have lower IRX values, up to 1dex on average, at a fixed mass compared to previously studied IRX-M_* relations at z&lt;4, albeit with significant scatter. This implies a lower obscured fraction of star formation than at lower redshifts. Our results suggest that dust properties of UV-selected star forming galaxies at z&gt;4 are characterised by (i) a steeper attenuation curve than at z&lt;4, and (ii) a rapidly decreasing dust obscured fraction of star formation as a function of redshift. Nevertheless, even among this UV-selected sample, massive galaxies (log M_*/$M_\odot$&gt;10) at z~5-6 already exhibit an obscured fraction of star formation of ~45%, indicating a rapid build-up of dust during the epoch of reionization.
Engaging with Raman Spectroscopy to Investigate Antibody Aggregation (2018)

In the last decade, a number of studies have successfully demonstrated Raman spectroscopy as an emerging analytical technique for monitoring antibody aggregation, especially in the context of drug development and formulation. Raman spectroscopy is a robust method for investigating protein conformational changes, even in highly concentrated antibody solutions. It is non-destructive, reproducible and can probe samples in an aqueous environment. In this review, we focus on the application and challenges associated with using Raman spectroscopy as a tool to study antibody aggregates.
2-Formylpyrrole natural products: origin, structural diversity, bioactivity and synthesis (2018)

Covering: up to April 2018 2-Formylpyrroles are ubiquitous in nature, arising from the non-enzymatic Maillard reactions of amines and sugars. Often confused for secondary metabolites, these Maillard products display interesting biological activities including hepatoprotective, immunostimulatory, antiproliferative and antioxidant effects. This review presents all 2-formylpyrrole natural products reported to date and identifies structural sub-classes for their categorisation. The origin, biological activity and chemical syntheses of these natural products are discussed herein.
Low-Magnetic-Field Divergence of the ElectronicgFactor Obtained from the Cyclotron Spin-Flip Mode of theν=1Quantum Hall Ferromagnet (2006)

We report an inelastic light scattering study of the cyclotron spin-flip mode in the two-dimensional electron system at filling nu=1. The energy of this mode can serve as a probe of the many-body exchange interaction on short length scales. Its magnetic field dependence is compared with predictions based on Hartree-Fock theory. They agree well when including the nonzero width of the electron system. From the measured energies, the exchange enhanced g factor is extracted. It diverges at small fields and differs largely from g factors obtained via transport activation studies.
New tube end closure system for the ram accelerator (1994)

The ram accelerator is a ramjet-in-tube device which has been demonstrated at velocities up to 2.5 km/s, has potential for operation up to 10 km/s, and could be used for direct space launch or large ballistic ranges. The ends of the main ram accelerator tube must have end closures which support substantial pressure differences. There are potentially serious difficulties using solid end closures such as diaphragms pierced by the projectile, explosively removed end closures, or fast acting valves. These include risks of significant damage to the projectile and launch tube and the wasting of tube length. A new end closure system which uses the momentum of an annular axial air jet to support the required pressure differences is described. This system avoids the difficulties of the solid end closure system at the cost of some increase in overall launch system complexity. A preliminary design of such an air jet end closure is presented, and it is concluded that the requirements for airflow rates and storage are reasonable and would likely add only a modest increase to the overall cost of the launch system. If the difficulties with solid end closures prove to be significant, the air jet end closure system may offer a solution.
Cohesin-dependent chromatin structure at a close view. (2014)

The cohesin complex is an important factor for the three-dimensional organization of chromatin. Hi-C studies have shown that chromatin loops cluster together into topological domains. Recently, we and others have used Hi-C to show how topological domains and subdomains change when the cohesin complex is depleted. Our study showed that topological domains are altered after cohesin depletion but not disrupted. However, the current resolution of Hi-C (40kb) is not sufficient to yield information about the inside of TADs, for instance which long range contacts are affected in particular and which regions remain unaffected, are only interactions involving cohesin sites affected and how does the chromatin fibre rearrange without cohesin. To address these question we have studied a 2.1 Mb region on the human chromosome 11 using our novel T2C technique which allows to generate a Hi-C type dataset at restriction fragment resolution (2-6 kb). Our selected region contains two topological domains and two imprinted gene clusters, H19/IGF2 and KCNQ1/KCNQ1OT1. We have generated T2C maps for two different cell types, a breast endothelial cell line and HEK293T cells, and also for cells where the cohesin complex was destroyed in interphase by proteolytic cleavage of its RAD21 subunit. We will present our results addressing the aforementioned questions. Further we have also reinvestigated previously published data concerning the interactions and potential co-regulation between the imprinted gene clusters and their imprinted control regions.
2A1-D01 Stragiht and Turning Movements of Miniature Aquatic Robot Utilizing Resonance of Elastic Fin (2015)

We have proposed a miniature aquatic robot propelled by resonance of elastic plate. In this paper, a new robot that realizes straight and turning movements is developed. The robot including a vibrating motor in the body shell swims forward with a tail fin and turns with side fins. Finally, the steering of robot is demonstrated.
Deletion of the Schizophyllum commune Aα Locus: The Roles of Aα Y and Z Mating-Type Genes (1996)

The A alpha locus is one of four master regulatory loci that determine mating type and regulate sexual development in Schizophyllum commune. We have made a plasmid containing a URA1 gene disruption of the A alpha Y1 gene. Y1 is the sole A alpha gene in A alpha 1 strains. We used the plasmid construction to produce an A alpha null (i.e., A alpha delta) strain by replacing the genomic Y1 gene with URA1 in an A alpha 1 strain. To characterize the role of the A alpha genes in the regulation of sexual development, we transformed various A alpha Y and Z alleles into A alpha delta strains and examined the acquired mating types and mating abilities of the transformants. These experiments demonstrate that the A alpha Y gene is not essential for fungal viability and growth, that a solitary Z A alpha mating-type gene does not itself activate development, that A beta proteins are sufficient to activate the A developmental pathway in the absence of A alpha proteins and confirm that Y and Z genes are the sole determinants of A alpha mating type. The data from these experiments support and refine our model of the regulation of A-pathway events by Y and Z proteins.
Synthesis and muscarinic activities of 1,2,4-thiadiazoles (1990)

A series of novel 1,2,4-thiadiazoles bearing a mono- or bicyclic amine at C5 were prepared. Quinuclidine and 1-azabicyclo[2.2.1]heptane derivatives were synthesized by reaction of the lithium enolate of the 3-methoxycarbonyl compounds followed by ester hydrolysis and decarboxylation. The receptor-binding affinity and efficacy of these compounds as muscarinic ligands was assessed by radioligand binding assays using [3H]-N-methylscopolamine and [3H]oxotremorine-M. Optimal agonist affinity was observed for 3'-methyl compounds. Smaller substituents (H) retained efficacy with reduced affinity while larger groups led to substantially lower efficacy. The observed binding affinity was influenced both by the conformational energy of rotation around the C3-C5' bond and the steric requirement of the mono- or bicyclic amine.
Mobile robot control in the road sign problem using Reservoir Computing networks (2008)

In this work we tackle the road sign problem with reservoir computing (RC) networks. The T-maze task (a particular form of the road sign problem) consists of a robot in a T-shaped environment that must reach the correct goal (left or right arm of the T-maze) depending on a previously received input sign. It is a control task in which the delay period between the sign received and the required response (e.g., turn right or left) is a crucial factor. Delayed response tasks like this one form a temporal problem that can be handled very well by RC networks. Reservoir computing is a biologically plausible technique which overcomes the problems of previous algorithms such as backpropagation through time - which exhibits slow (or non-) convergence on training. RC is a new concept that includes a fast and efficient training algorithm. We show that this simple approach can solve the T-maze task efficiently.
NTT,SPITZER, ANDCHANDRASPECTROSCOPY OF SDSSJ095209.56+214313.3: THE MOST LUMINOUS CORONAL-LINE SUPERNOVA EVER OBSERVED, OR A STELLAR TIDAL DISRUPTION EVENT? (2009)

The galaxy SDSSJ095209.56+214313.3 (SDSSJ0952+2143 hereafter) showed remarkable emission-line and continuum properties and strong emission-line variability first reported in 2008 (Paper I). The spectral properties and low-energy variability are the consequence of a powerful high-energy flare which was itself not observed directly. Here we report follow-up optical, near-infrared (NIR), mid-infrared (MIR), and X-ray observations of SDSSJ0952+2143. We discuss outburst scenarios in terms of stellar tidal disruption by a supermassive black hole, peculiar variability of an active galactic nucleus (AGN), and a supernova (SN) explosion, and possible links between these scenarios and mechanisms. The optical spectrum of SDSSJ0952+2143 exhibits several peculiarities: an exceptionally high ratio of [Fe VII] transitions over [O III], a dramatic decrease by a factor of 10 of the highest-ionization coronal lines, a very unusual and variable Balmer line profile including a triple-peaked narrow component with two unresolved horns, and a large Balmer decrement. The MIR emission measured with the Spitzer IRS in the narrow 10-20μm band is extraordinarily luminous and amounts to L10-20 μm = 3.5 × 1043ergs-1. The IRS spectrum shows a bump around 11μm and an increase toward longer wavelengths, reminiscent of silicate emission. The strong MIR excess over the NIR implies the dominance of relatively cold dust. The pre- and post-flare NIR host galaxy colors indicate a nonactive galaxy. The X-ray luminosity of Lx,0.1-10 keV = 1041ergs-1 measured with Chandra is below that typically observed in AGNs. Similarities of SDSSJ0952+2143 with some extreme SNe suggest the explosion of a SN of Type IIn. However, an extreme accretion event in a low-luminosity AGN or inactive galaxy, especially stellar tidal disruption, remain possibilities, which could potentially produce a very similar emission-line response. If indeed a SN, SDSSJ0952+2143 is one of the most distant X-ray- and MIR-detected SNe known so far, the most MIR luminous, and one of the most X-ray luminous. It is also by far the most luminous (&gt;1040ergs-1) in high-ionization coronal lines, exceeding previous SNe by at least a factor of 100.
Paper Session II-D - Virtual Science Mentor (1998)

No other information or file available for this session.
Metric-based multimodal meta-learning for human movement identification via footstep recognition (2021)

We describe a novel metric-based learning approach that introduces a multimodal framework and uses deep audio and geophone encoders in siamese configuration to design an adaptable and lightweight supervised model. This framework eliminates the need for expensive data labeling procedures and learns general-purpose representations from low multisensory data obtained from omnipresent sensing systems. These sensing systems provide numerous applications and various use cases in activity recognition tasks. Here, we intend to explore the human footstep movements from indoor environments and analyze representations from a small self-collected dataset of acoustic and vibration-based sensors. The core idea is to learn plausible similarities between two sensory traits and combining representations from audio and geophone signals. We present a generalized framework to learn embeddings from temporal and spatial features extracted from audio and geophone signals. We then extract the representations in a shared space to maximize the learning of a compatibility function between acoustic and geophone features. This, in turn, can be used effectively to carry out a classification task from the learned model, as demonstrated by assigning high similarity to the pairs with a human footstep movement and lower similarity to pairs containing no footstep movement. Performance analyses show that our proposed multimodal framework achieves a 19.99\% accuracy increase (in absolute terms) and avoided overfitting on the evaluation set when the training samples were increased from 200 pairs to just 500 pairs while satisfactorily learning the audio and geophone representations. Our results employ a metric-based contrastive learning approach for multi-sensor data to mitigate the impact of data scarcity and perform human movement identification with limited data size.
Synthesis of 2‐Alkenyl‐1‐pyrrolin‐1‐oxides and Polysubstituted Nitrones. (2003)

Abstract For Abstract see ChemInform Abstract in Full Text.
Relationship between location of epileptic focus and occurrence during sleep versus wakefulness (2022)

Different sleep stages exert differential effects on interictal discharges, neural synchrony and seizure threshold. We sought to assess the relationship between localization of the epileptogenic focus and seizure distribution in sleep versus wakefulness among patients with refractory epilepsy. We conducted a retrospective chart review-based study. Video-electroencephalography of patients with refractory epilepsy, planned for resective surgery, were reviewed for seizure localisation and occurrence relative to stage of sleep/wakefulness. Demographic/clinical data, including details of surgery, were also recorded. Bivariate analysis was conducted using the chi-square test for proportions and unpaired t-test/ANOVA to compare the means within groups. We enrolled 175 patients (107 males) with a mean age of 26.1 + 9.8 years (range: 4-53 years). We analysed 1,282 seizures, of which 916 (71.5%) were temporal, 95 (7.4%) frontal, 144 (11.2 %) central/ parietal and 19 (1.5%) arose from the occipital lobe. Temporal lobe onset seizures were more frequent during wakefulness (77.7%) compared to extra-temporal localization (65%) (p<0.0001). Amongst temporal lobe onset seizures, those during wakefulness arose more frequently from the lateral temporal (88.6%) compared to the mesial temporal lobe (75.5%) (p=0.0003). A higher proportion of seizures evolved into secondary generalisation during sleep (23.5%) versus 8.7% during wakefulness (p<0.0001). Our study demonstrates that lobar location of epileptogenic foci is associated with a predilection of seizures to occur, as well as secondarily generalise, during sleep/wakefulness. Seizures with lateral temporal lobe as well as extratemporal lobe onset were more likely to occur during wakefulness. Overall, sleep related seizures were more likely to be of extratemporal lobe onset, though.
Electrical properties and crystal structure of (Ba,Sr)TiO3 films prepared at low temperatures on a LaNiO3 electrode by radio-frequency magnetron sputtering (1997)

(Ba,Sr)TiO3 films on a LaNiO3 underlayer were prepared by radio-frequency magnetron sputter deposition. The onset of crystallization of the films occurred at a deposition temperature (Td) as low as 200 °C. Good crystallinity was observed at Td⩾350 °C. A moderate high dielectric constant (εr∼170–250) of the films was obtained at relatively low Td∼200–300 °C. The value of εr showed a much slower increase with Td⩾350 °C than that expected from the progress of crystallinity. The deviation was attributed to an interdiffusion layer formed between the film and underlayer, which also caused an abnormal contact potential barrier and a decline of the εr value of the samples postannealed at 350 °C. Annealing at 300 °C under O2 atmosphere lessened the oxygen deficiency in the film and enhanced the dielectric constant without forming an interfacial layer.