gebhart/patrepeval huggingface dataset:
Crystal and molecular structure of the five-coordinate complex dichloro-1,1,7,7-tetraethyldiethylenetriaminecobalt(II) (1967)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of the five-coordinate complex dichloro-1,1,7,7-tetraethyldiethylenetriaminecobalt(II)Zvi Dori, Richard Eisenberg, and Harry B. GrayCite this: Inorg. Chem. 1967, 6, 3, 483–486Publication Date (Print):March 1, 1967Publication History Published online1 May 2002Published inissue 1 March 1967https://pubs.acs.org/doi/10.1021/ic50049a010https://doi.org/10.1021/ic50049a010research-articleACS PublicationsRequest reuse permissionsArticle Views95Altmetric-Citations28LEARN 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
General total variation regularized sparse Bayesian learning for robust block-sparse signal recovery (2021)

Block-sparse signal recovery without knowledge of block sizes and boundaries, such as those encountered in multi-antenna mmWave channel models, is a hard problem for compressed sensing (CS) algorithms. We propose a novel Sparse Bayesian Learning (SBL) method for block-sparse recovery based on popular CS based regularizers with the function input variable related to total variation (TV). Contrary to conventional approaches that impose the regularization on the signal components, we regularize the SBL hyperparameters. This iterative TV-regularized SBL algorithm employs a majorization-minimization approach and reduces each iteration to a convex optimization problem, enabling a flexible choice of numerical solvers. The numerical results illustrate that the TV-regularized SBL algorithm is robust to the nature of the block structure and able to recover signals with both block-patterned and isolated components, proving useful for various signal recovery systems.
A Fourth IkB Protein within the NF-kB Signaling Module (2007)

Inflammatory NF-kB/RelA activation is mediated by the three canonical inhibitors, IkBa ,- b, and -3. We report here the characterization of a fourth inhibitor, nfkb2/p100, that forms two distinct inhibitory complexes with RelA, one of which mediates developmental NF-kB activation. Our genetic evidence confirms that p100 is required and sufficient as a fourth IkB protein for noncanonical NF-kB signaling downstream of NIK and IKK1. We develop a mathematical model of the four-IkB-containing NF-kB signaling module to account for NF-kB/RelA:p50 activation in response to inflammatory and developmental stimuli and find signaling crosstalk between them that determines gene-expression programs. Further combined computational and experimental studies reveal that mutant cells with altered balances between canonical and noncanonical IkB proteins may exhibit inappropriate inflammatory gene expression in response to developmental signals. Our results have important implications for physiological and pathological scenarios in which inflammatory and developmental signals converge.
PRODUCTION OF PALM OIL WITH METHANE AVOIDANCE AT PALM OIL MILL: A CASE STUDY OF CRADLE-TO-GATE LIFE CYCLE ASSESSMENT (2013)

The study discusses a case study of cradle to gate life cycle assessment for the production of Crude Palm Oil (CPO) with methane avoidance at palm oil mill. The improved milling process enables total utilization of the oil palm fruit to produce alow oil palm based food source. The minimal modification in the mill includes cleaning of Fresh Fruit Bunches (FFB) and obtaining the low oil food source from the aqueous stream. The oil palm fruit processing plant enables the significant reduction of Greenhouse Gas (GHG) such as methane and carbon dioxide emissions by avoiding the formation of liquid biomass in the form of Palm Oil Mill Effluent (POME). The attributional Life Cycle Assessment (LCA) shows the improved milling process contributes to significant reduction of GHG emission from palm oil mills as compared to the process of capturing biogas from POME. The palm based food source contains phytonutrients, namely carotenoids, tocols (tocopherol and tocotrienols) and water soluble polyphenols.
Analysis of a Cone-Based Distributed Topology Control Algorithm for Wireless Multi-hop Networks (2002)

The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control algorithm. This algorithm, introduced in [16], does not assume that nodes have GPS information available; rather it depends only on directional information. Roughly speaking, the basic idea of the algorithm is that a node $u$ transmits with the minimum power $p_{u,α}$ required to ensure that in every cone of degree $α$ around $u$, there is some node that $u$ can reach with power $p_{u,α}$. We show that taking $α= 5π/6$ is a necessary and sufficient condition to guarantee that network connectivity is preserved. More precisely, if there is a path from $s$ to $t$ when every node communicates at maximum power, then, if $α&lt;= 5π/6$, there is still a path in the smallest symmetric graph $G_α$ containing all edges $(u,v)$ such that $u$ can communicate with $v$ using power $p_{u,α}$. On the other hand, if $α&gt; 5π/6$, connectivity is not necessarily preserved. We also propose a set of optimizations that further reduce power consumption and prove that they retain network connectivity. Dynamic reconfiguration in the presence of failures and mobility is also discussed. Simulation results are presented to demonstrate the effectiveness of the algorithm and the optimizations.
Early life experience drives structural variation of neural genomes in mice (2018)

Brain development and behavior are influenced by early life experiences, such as nutrients, stress, adversity and maternal care. While we believe the epigenome is the mediator, these authors investigated whether the genome itself of individual brain cells could be changed by environmental factors. A possible mechanism relies on mobile DNA sequences that change their position within the genome by a DNA-based (transposition) or RNA-based (retrotransposition) mechanism. They show that pups subjected to low maternal care or maternal separation for the first 2 weeks accumulated LINE-1 retrotransposons specifically in the hippocampus, known for its plasticity, but not in the frontal cortex - a somatic mosaic event.
Electric‐Field‐Directed Assembly of Biomolecular‐Derivatized Nanoparticles into Higher‐Order Structures (2007)

Multilayered structures composed of biomolecule-derivatized nanoparticles can be fabricated by electric-field-directed self-assembly. A microelectrode-array device facilitates the rapid parallel electrophoretic transport and binding of biotin and streptavidin fluorescent nanoparticles to specific sites on the microarray. Control of the current, voltage, and activation time of each of the 400-microarray electrodes allows a combinatorial approach to optimize nanoparticle binding. Under optimal conditions, nanoparticle layers form within 15 s of microelectrode activation, and the directed assembly of more than 50 alternate layers of nanoparticles is complete within an hour. The final multilayered structures are removed from the support by a relatively simple lift-off process. The electric-field process allows the parallel patterned assembly of multilayer structures using extremely low concentrations of nanoparticles and produces minimal nonspecific binding to unactivated sites. These results are significant for the development of rapid, maskless nanofabrication and hierarchical integration of biomolecular-derivatized nanocomponents into higher-order materials and devices.
Low-Rank Phase Retrieval (2017)

We develop two iterative algorithms for solving the low-rank phase retrieval (LRPR) problem. LRPR refers to recovering a low-rank matrix X from magnitude-only (phaseless) measurements of random linear projections of its columns. Both methods consist of a spectral initialization step followed by an iterative algorithm to maximize the observed data likelihood. We obtain sample complexity bounds for our proposed initialization approach to provide a good approximation of the true X. When the rank is low enough, these bounds are significantly lower than what existing single vector phase retrieval algorithms need. Via extensive experiments, we show that the same is also true for the proposed complete algorithms.
N‐(Phenylthio)‐ε‐caprolactam: A New Promoter for the Activation of Thioglycosides. (2004)

Abstract For Abstract see ChemInform Abstract in Full Text.
Arousal, ventilatory, and airway responses to bronchopulmonary stimulation in sleeping dogs (1979)

We studied waking, ventilatory, and reflex tracheal smooth muscle (TSM) responses to tracheobronchial irritation or lung inflation in three sleeping dogs. The dogs breathed through a cuffed endotracheal tube, and airflow was measured with a pneumotachograph. TSM tone was monitored directly by measuring pressure in the water-filled cuff of the endotracheal tube. Mild degrees of tracheobronchia irritation, produced by squirting 0.1--1.0 ml of water into the lower trachea, or by having the dogs inhale one breath of acetic acid vapor (concentration 17 ppm), generally caused arousal from slow-wave sleep (SWS), but not from rapid-eye-movement (REM) sleep. During wakefulness the irritant stimuli caused coughing and TSM constriction; during SWS or REM sleep, these responses occurred only if the stimulus first produced arousal. In contrast, stimulation of pulmonary stretch receptors by lung inflation did not cause arousal, but readily produced apnea and TSM relaxation during SWS. The results indicate that cough and airway smooth muscle constriction in response to bronchopulmonary irritant stimuli do not occur in the absence of arousal, and that arousal responses to such stimuli are depressed in REM sleep.
Vascular effects of the bufodienolides. (2008)

The bufodienolides are natriuretic steroids, which also have the capacity to cause vasoconstriction, and are cardiac inotropes. Their mechanism of action appears to be related to their ability to inhibit Na+/K+ ATPase. The actions of one of these compounds, marinobufagenin (MBG), have been investigated in a rat model of preeclampsia, an example of volume expansion-mediated hypertension. The urinary excretion of MGB is increased in this model. Furthermore, this increment in its excretion occurs prior to the development of hypertension and proteinuria. The animals also demonstrate intrauterine growth restriction. Studies of the effect of MBG on cytotrophoblast cells reveal that MGB inhibits the migration, proliferation and invasion of these cells. We propose that MGB is an important etiologic factor in at least some forms of preeclampsia and that the level of its excretion in the urine may prove to be of diagnostic value.
Bubble dynamics of ultrasound contrast agents (1998)

The bubble dynamics involved with microbubble contrast agents under insonification is investigated. The acoustic field of an ATL HDI-3000 diagnostic ultrasound system in a contrast specific harmonic imaging mode is reviewed first, and its major features that are related with microbubble behavior are discussed. Issues relating to sound attenuation, mechanical index, and bubble destruction are addressed. The nonlinear oscillatory behavior of contrast microbubbles is modeled with the Gilmore equation. The acoustic pressure field of a short pulse utilized in harmonic imaging is measured with a hydrophone and used as the driving pressure of the Gilmore model. Radius-time [R(t)] and bubble wall velocity-time [U(t)] curves are shown. Frequency domain analysis of U(t) indicates transient resonance characteristics in both the fundamental and second harmonic components that are somewhat different from what one would expect with a continuous-wave steady-state response. The times for complete solution of microbubbles in water are calculated and correlated to observations seen in ultrasound images with contrast agents. Radio frequency (rf) data of scattered pulses from contrast agent microbubbles in an in-vitro experiment were collected with a phased array. This data is used to support and explain the contrast microbubble behavior.
The Geometrical Optical Description and Incoherent Imaging (2005)

This chapter contains sections titled: Introduction Characteristic Functions Geometrical Optics and the Wave Equation The Characteristic Functions Geometrical-optical imaging The Canonical Pupil A Note on Diffractive Optical Elements The Ideal Wave-optical Image of a Point and Geometrical-optical Image Formation The Scalar Luneburg Integral Energy Discussions for Optical Imaging The Airy Disc Incoherent Resolution Aberrations of Optical The Small-aberration Limit: The Strehl Ratio Expansion of the Wave-front Error into Zernike Polynomials Point Images for Different Aberrations Distortion, Defocus and Astigmatism Spherical Aberrations Z9, Coma Z7 and Z8 Line of Sight Wave Aberrations for Annular Pupils Extended Zernike Expansion Helmholtz–Lagrange Invariant and Phase-space Description The Phase Space The Resolution Limit in the Space Domain and in the Spatial Frequency Domain The Space–Bandwidth Product Literature
A temperature-insensitive refractometer based on transverse electric (TE) and transverse magnetic (TM) modes in open-top ridge waveguides (2008)

A technique for creating a temperature-insensitive refractometer that utilizes transverse electric (TE) and transverse magnetic (TM) modes in an open-top ridge waveguide design is presented. By using the TE mode resonance as a temperature reference, the relative shift of the TM mode can be monitored in order to measure the refractive index of liquids under test. Specifically, the device fabricated here produces a resonance shift of 1 pm for every 1 × 10−4 of measured index change, with a temperature sensitivity less than 0.5 pm °C−1. To increase the sensitivity of these devices, a theoretical model is developed to investigate the performance of some potential waveguide structures. Relationships between the waveguide core size, refractive index distribution, as well as the relative evanescent sensitivity of TE and TM modes are examined.
Throughput-Outage Scaling Behaviors for Wireless Single-Hop D2D Caching Networks with Physical Model -- Analysis and Derivations (2021)

Throughput-Outage scaling laws for single-hop cache-aided device-to-device (D2D) communications have been extensively investigated under the assumption of the protocol model. However, the corresponding performance under physical models has not been explored; in particular it remains unclear whether link-level power control and scheduling can improve the asymptotic performance. This paper thus investigates the throughput-outage scaling laws of cache-aided single-hop D2D networks considering a general physical channel model. By considering the networks with and without the equal-throughput assumption, we analyze the corresponding outer bounds and provide the achievable performance analysis. Results show that when the equal-throughput assumption is considered, using link-level power control and scheduling cannot improve the scaling laws. On the other hand, when the equal-throughput assumption is not considered, we show that the proposed double time-slot framework with appropriate link-level power control and scheduling can significantly improve the throughput-outage scaling laws, where the fundamental concept is to first distinguish links according to their communication distances, and then enhance the throughput for links with small communication distances.
The Subunit Structure of Human Breast Cancer Progesterone Receptors: Characterization by Chromatography and Photoaffinity Labeling* (1983)

We have partially purified the progesterone receptors (PR) from T47D human breast cancer cells and show that they consist of at least two hormone-binding proteins of dissimilar size and unequal DNA-binding forms with electrophoretic properties analogous to the A and B subunits of chick oviduct PR. Cytosols were labeled with the progestin [3H]R5020 in the presence or absence of unlabeled R5020, and samples of the parallel incubations were chromatographed on DEAE-cellulose. A large heterogeneous peak of specific R5020 binding eluted between 0.1 and 0.2 M KCl. Pooled fractions of this peak were resolved on phosphocellulose into two peaks: an acidic moiety eluting at 0.15 M KCl, and a more basic one eluting at 0.2 M KCl. Both sediment at approximately 4.1S on sucrose density gradients. To test DNA binding capacity, two studies were performed. First, ammonium sulfate-precipitated receptors were applied to DNA-cellulose; approximately half of the specific radioactivity was retained. Second, separate DNA-cellulose chromatography of the individual phosphocellulose peaks showed that the basic peak had greater affinity for DNA. Molecular weights were determined by sodium dodecyl sulfatepolyacrylamide gel electrophoresis after in vitro covalent photoaffinity linking of the receptors to [3H]R5020, a photoreactive ligand. Radioactive R5020-receptor complexes were precipitated with ammonium sulfate, and the redissolved samples were immediately photolinked and electrophoresed. Two specifically photolinked peaks with molecular weights of 115,000 (B subunit) and 81,000 (A subunit), were invariably present in equimolar ratios (B:A = 1.1; n = 9). Similar values were obtained for receptors irradiated in cells in situ. A third specifically photolabeled peak (mol wt, 206,000) was seen in approximately 20% of gels after in vitro irradiation. It may be an adventitiously crosslinked A-B dimer. We conclude that human breast cancer PR, like chick oviduct PR but unlike other steroi receptors, are oligomers composed of at least two dissimilar subunits.
<title>Three-dimensional memory system based on two-photon absorption</title> (1994)

We discuss a volume optical storage, a 3D memory based on two-photon absorption process. This memory has an advantage over a 2D memory in that it combines fast access time together with high memory capacity--a capability that 2D memories cannot deliver. Two-photon 3D memory allows the data to be accessed in parallel, and thus speeds up data transfer rate significantly. In this paper, we address the issue of memory hierarchy which has been organized to provide a performance continuum of different memory technologies available at present. We justify the two-photon 3D memory as a viable technology to fill the performance gap currently exists between a primary and secondary storage systems. We also discuss the system capacity pertaining to two unique addressing schemes, i.e., orthogonal beam addressing and counterpropagating beam addressing. Finally, we report the progress in system study regarding the effect of memory material characteristic to the system design and development. Factors such as optimum wavelengths for read/write operations, material fluorescence, material fatigue, and the concentration of active molecules in the host material were considered.
Ultrathin Broadband Metasurface Superabsorbers from a van der Waals Semimetal (2022)

Metamaterials and metasurfaces operating in the visible and near-infrared (NIR) offer a promising route towards next-generation photodetectors and devices for solar energy harvesting. While numerous metamaterials and metasurfaces using metals and semiconductors have been demonstrated, semimetals-based metasurfaces in the vis-NIR range are notably missing. Here, we experimentally demonstrate a broadband metasurface superabsorber based on large area, semimetallic, van der Waals PtSe2 thin films in agreement with electromagnetic simulations. Our results show that PtSe2 is an ultrathin and scalable semimetal that concurrently possesses high index and high extinction across the vis-NIR range. Consequently, the thin-film PtSe2 on a reflector separated by a dielectric spacer can absorb &gt; 85 % for the unpatterned case and ~97 % for the optimized 2D metasurface in the 400-900 nm range making it one of the strongest and thinnest broadband perfect absorbers to date. Our results present a scalable approach to photodetection and solar energy harvesting, demonstrating the practical utility of high index, high extinction semimetals for nanoscale optics.
Hydrogen Storage with Spectroscopic Identification of Chemisorption Sites in Cu-TDPAT via Spillover from a Pt/Activated Carbon Catalyst (2014)

Hydrogen spillover to the Cu-TDPAT (TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine) metal–organic framework is probed with adsorption measurements, ex situ characterization techniques, and density functional theory (DFT) calculations. At 1 bar and 300 K, hydrogen chemisorption to Pt/AC/Cu-TDPAT exceeds that expected for physisorption by 8-fold, which is attributable to both catalyst insertion and the creation of structural defects. Hydrogenation of (a) the Cu–O–C bond of the Cu paddlewheel, (b) the sp2 N heterocycle, and (c) the secondary amine is demonstrated with ex situ spectroscopy. Exothermic (with respect to H2) hydrogenation at the Cu–O–C bond of the paddlewheel is substantiated by DFT. However, hydrogenated Cu–O–C is metastable, as evidence for dissociation is found at higher temperature (i.e., 473 K H2). DFT calculations demonstrate hydrogenation of the N groups may occur exothermically only for a charged ligand, suggestive that defects may contribute to hydrogen chemisorption. At high pressure, slow adsorption rates and material instability render the material unsuitable for practical hydrogen storage applications.
Modeling growth rate dispersion in a batch sucrose crystallizer (1986)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModeling growth rate dispersion in a batch sucrose crystallizerKris A. Berglund and Vincent G. MurphyCite this: Ind. Eng. Chem. Fundamen. 1986, 25, 1, 174–176Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1986https://doi.org/10.1021/i100021a029Request reuse permissionsArticle Views126Altmetric-Citations14LEARN 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 InReddit PDF (339 KB) Get e-Alerts