gebhart/patrepeval huggingface dataset:
Transverse nuclear spin relaxation in phospholipid bilayer membranes (1987)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransverse nuclear spin relaxation in phospholipid bilayer membranesMyer Bloom and Edward SterninCite this: Biochemistry 1987, 26, 8, 2101–2105Publication Date (Print):April 1, 1987Publication History Published online1 May 2002Published inissue 1 April 1987https://pubs.acs.org/doi/10.1021/bi00382a007https://doi.org/10.1021/bi00382a007research-articleACS PublicationsRequest reuse permissionsArticle Views311Altmetric-Citations82LEARN 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
Classifying packets with hierarchical intelligent cuttings (2000)

Increasing demands on Internet router performance and functionality create a need for algorithms that classify packets quickly with minimal storage requirements and allow frequent updates. Unlike previous algorithms, the algorithm proposed here meets this need well by using heuristics that exploit structure present in classifiers. Our approach, which we call HiCuts (hierarchical intelligent cuttings), attempts to partition the search space in each dimension, guided by simple heuristics that exploit the classifier's structure. We discover this structure by preprocessing the classifier. We can tune the algorithm's parameters to trade off query time against storage requirements. In classifying packets based on four header fields, HiCuts performs quickly and requires relatively little storage compared with previously described algorithms.
Advantage of circularly polarized light in nonlinear fiber-amplifiers (2010)

We experimentally demonstrate that circular polarization state is beneficial if the Kerr-nonlinearity has to be lowered during the amplification of laser pulses. It can be shown that in a fiber-based chirped pulse amplification (CPA) system, the use of circularly and linearly polarized light result in different B-integrals, which are measured using phase-only pulse-shaping. The theoretical value of 2/3 for the ratio of the B-integrals of circularly and linearly polarized light is experimentally confirmed. Circularly polarized light facilitates peak-power scaling, moreover, the self-focussing threshold can be enhanced.
Habitual versus Goal-directed Action Control in Parkinson Disease (2010)

This study presents the first direct investigation of the hypothesis that dopamine depletion of the dorsal striatum in mild Parkinson disease leads to impaired stimulus-response habit formation, thereby rendering behavior slow and effortful. However, using an instrumental conflict task, we show that patients are able to rely on direct stimulus-response associations when a goal-directed strategy causes response conflict, suggesting that habit formation is not impaired. If anything our results suggest a disease severity-dependent deficit in goal-directed behavior. These results are discussed in the context of Parkinson disease and the neurobiology of habitual and goal-directed behavior.
The Picard iteration and its application (2006)

The convergence behavior of the Picard iteration Xk+1=AXk+B and the weighted case Yk=Xk/bk is investigated. It is shown that the convergence of both these iterations is related to the so-called effective spectrum of A with respect to some matrix. As an application of our convergence results we discuss the convergence behavior of a sequence of scaled triangular matrices {DNTN }.
Living cationic polymerization of vinyl ethers with a functional group. VII. Polymerization of vinyl ethers with a silyloxyl group and synthesis of polyalcohols and related functional polymers (1989)

Abstract Living cationic polymerizations of two silicon‐containing vinyl ethers, 2‐( t ‐butyldimethyl‐silyloxyl)ethyl vinyl ether ( t BuSiVE) and 2‐(trimethylsilyloxyl)ethyl vinyl ether (MeSiVE), have been achieved with use of the hydrogen iodide/iodine (HI/I 2 ) initiating system in toluene at −15 or −40°C, despite the existence of the acid‐sensitive silyloxyl pendants. The living nature of the polymerizations was demonstrated by linear increases in the number‐average molecular weights (M̄ n ) of the polymers in direct proportion to monomer conversion and by their further rise upon addition of a second monomer feed to a completely polymerized reaction mixture. The polymers obtained in these experiments all exhibited very narrow molecular weight distributions (MWD) with M̄ w /M̄ n around or below 1.1. Desilylation of the polymers under mild conditions (with H + for MeSiVE and F − for tBuSiVE) gave poly(2‐hydroxyethyl vinyl ether), a water‐soluble polyalcohol with a narrow MWD. The living processes also permitted clean syntheses of amphiphilic AB block copolymers and water‐soluble methacrylate‐type macromonomers, all of which bear narrowly distributed segments of the polyalcohol derived from the silicon‐containing vinyl ethers.
A chair as ubiquitous input device (2014)

During everyday office work we are used to controlling our computers with keyboard and mouse, while the majority of our body remains unchallenged and the physical workspace around us stays largely unattended. Addressing this untapped potential, we explore the concept of turning a flexible office chair into a ubiquitous input device. To facilitate daily desktop work, we propose the utilization of semaphoric chair gestures that can be assigned to specific application functionalities. The exploration of two usage scenarios in the context of focused and peripheral interaction demonstrates high potential of chair gestures as additional input modality for opportunistic, hands-free interaction.
Use of Amorphous Silicon for Active Photonic Devices (2013)

Silicon photonics is a new emerging and disruptive technology aimed at using cost-effective silicon-based materials for the generation, control, and detection of modulated light signals for optical communication. Hydrogenated amorphous silicon (a-Si:H) is a particularly promising platform for enabling the desired matching between electronics and on-chip photonics. Thin a-Si:H layers can be in fact deposited using the CMOS-compatible low-temperature plasma-enhanced chemical vapor deposition technique, with no impact at all on the microelectronic layers. This paper provides an overview of the progress and the state of the art of a-Si:H-based active photonic devices, focusing, in particular, on the low technological complexity required for an easy integration within a single photonic microchip. This paper consists of three main sections, in each of which the exploitable optoelectronic effects present in a-Si:H are presented. A comparison between some experimental a-Si:H and crystalline-Si photonic components available in the literature is presented.
A study of plasma alpha-2-macroglobulin levels in type 2 diabetic subjects with microalbuminuria. (2001)

The increase in plasma alpha-2 macroglobulin levels in diabetes may be a correlative measure to encounter the potential proteolytic challenge associated with diabetic microangiopathy, even very early in the course of the disease. Alph-2 macroglobulin may yet be one of the most specific markers of microvascular complications in diabetes than any other serum protein.
SUPPRESSION OF MOUSE SKIN ALLOGRAFT REJECTION BY PROTEIN A-YERSINIAE V ANTIGEN FUSION PEPTIDE1 (1997)

V antigen is an established virulence factor of Yersinia pestis, the causative agent of bubonic plague. Injection of homogenous staphylococcal protein A-V antigen fusion peptide into mice was previously found to suppress tumor necrosis factor-alpha and interferon-gamma necessary for generation of protective granulomas. Here, we show that BALB/c mice receiving daily intraperitoneal injections of 100 microg of control protein A initiated rejection of C57BL/6 mouse tail skin grafts after 6.2+/-1.1 days. This time doubled to 12.2+/-1.4 days upon similar administration of protein A-V antigen fusion peptide (P<0.001); times of total allograft retention remained constant. This finding indicates that V antigen can postpone inflammation known to be associated with recognition and destruction of foreign tissue by T lymphocytes.
Dynamic calibration and compensation of a 3D laser radar scanning system (1993)

LIDAR (laser radar) is used to measure three-dimensional (3-D) object positions. It produces a range and an intensity image of the measured object and relies on the range image to determine the 3-D positions of the object. Because the range image is frequently corrupted with noise, a dynamic method to improve the LIDAR accuracy, based on a polynomial calibration model and an autoregressive moving-average calibration model, has been established. Experimental results show that the measurement errors of the LIDAR system have been reduced from 163 counts to 18 counts after compensation using the polynomial calibration model and that the errors have been further reduced to 11 counts with the ARMA model.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Acquisition of iron bound to low molecular weight chelates by human monocyte-derived macrophages. (1994)

The iron content of tissue macrophages increases under conditions of elevated extracellular iron. Studies of macrophage iron acquisition have generally focused on iron uptake from transferrin via receptor-mediated endocytosis. However, in vivo macrophages are also exposed to extracellular low m.w. iron chelates, particularly under conditions of iron overload. Therefore, we examined the mechanism of iron acquisition from low m.w. chelates by human monocyte-derived macrophages. Iron acquisition was influenced by the nature of the iron chelate: Fe-ascorbate > Fe-citrate > Fe-nitrilotriacetate (NTA) = Fe-ADP > Fe-glycyl-L-histidyl-L-lysine > Fe-diethylenetriamine pentaacetic acid >> Fe-EDTA = Fe-deferoxamine. With the exception of Fe-EDTA and Fe-deferoxamine, iron acquisition was greater than that with diferric transferrin. As assessed by using iron acquisition from NTA as a model, the process is temperature dependent, but pH independent (pH 5 to 8), and is influenced by the medium in which the cells are suspended. Acquisition is not affected by NaF, 2-deoxy-D-glucose, NaCN, or monocyte-derived macrophage exposure to trypsin, pronase, phenylarsine oxide, dihydrocytochalasin B, filipin, nystatin, or digitonin. The rate of iron acquisition from NTA is induced by iron pre-exposure as well as aluminum. In contrast, NTA chelates of other transition metals (Cd, Cu, Ga, Mn, and Zn) inhibited iron uptake by 20 to 80%. Unlike results obtained with Ga-NTA, Ga(NO3)3 increased iron uptake from NTA. Data obtained with neutrophils, and undifferentiated U937 and HL-60 cells were similar, which suggests that myeloid cells share this pathway for iron acquisition. Iron acquisition via this mechanism may allow macrophages and other leukocytes to clear local states of iron overload in vivo.
Infrared and Raman Spectra of the Trimer and Tetramer of Phosphonitridic Dichloride<sup>1</sup> (1954)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared and Raman Spectra of the Trimer and Tetramer of Phosphonitridic Dichloride1L. W. DaaschCite this: J. Am. Chem. Soc. 1954, 76, 13, 3403–3408Publication Date (Print):July 1, 1954Publication History Published online1 May 2002Published inissue 1 July 1954https://pubs.acs.org/doi/10.1021/ja01642a013https://doi.org/10.1021/ja01642a013research-articleACS PublicationsRequest reuse permissionsArticle Views109Altmetric-Citations59LEARN 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
The influence of freezing rates on bovine pericardium tissue Freeze-drying (2009)

The bovine pericardium has been used as biomaterial in developing bioprostheses. Freeze-drying is a drying process that could be used for heart valve's preservation. The maintenance of the characteristics of the biomaterial is important for a good heart valve performance. This paper describes the initial step in the development of a bovine pericardium tissue freeze-drying to be used in heart valves. Freeze-drying involves three steps: freezing, primary drying and secondary drying. The freezing step influences the ice crystal size and, consequently, the primary and secondary drying stages. The aim of this work was to investigate the influence of freezing rates on the bovine pericardium tissue freeze-drying parameters. The glass transition temperature and the structural behaviour of the lyophilized tissues were determined as also primary and secondary drying time. The slow freezing with thermal treatment presented better results than the other freeze-drying protocols.
Oncometabolic mutation IDH1 R132H confers a metformin-hypersensitive phenotype (2015)

Metabolic flexibility might be particularly constrained in tumors bearing mutations in isocitrate dehydrogenase 1 (IDH1) leading to the production of the oncometabolite 2-hydroxygluratate (2HG). To test the hypothesis that IDH1 mutations could generate metabolic vulnerabilities for therapeutic intervention, we utilized an MCF10A cell line engineered with an arginine-to-histidine conversion at position 132 (R132H) in the catalytic site of IDH1, which equips the enzyme with a neomorphic α-ketoglutarate to 2HG reducing activity in an otherwise isogenic background. IDH1 R132H/+ and isogenic IDH1 +/+ parental cells were screened for their ability to generate energy-rich NADH when cultured in a standardized high-throughput Phenotype MicroArrayplatform comprising >300 nutrients. A radical remodeling of the metabotype occurred in cells carrying the R132H mutation since they presented a markedly altered ability to utilize numerous carbon catabolic fuels. A mitochondria toxicity-screening modality confirmed a severe inability of IDH1-mutated cells to use various carbon substrates that are fed into the electron transport chain at different points. The mitochondrial biguanide poisons, metformin and phenformin, further impaired the intrinsic weakness of IDH1-mutant cells to use certain carbon-energy sources. Additionally, metabolic reprogramming of IDH1-mutant cells increased their sensitivity to metformin in assays of cell proliferation, clonogenic potential, and mammosphere formation. Targeted metabolomics studies revealed that the ability of metformin to interfere with the anaplerotic entry of glutamine into the tricarboxylic acid cycle could explain the hypersensitivity of IDH1-mutant cells to biguanides. Moreover, synergistic interactions occurred when metformin treatment was combined with the selective R132H-IDH1 inhibitor AGI-5198. Together, these results suggest that therapy involving the simultaneous targeting of metabolic vulnerabilities with metformin, and 2HG overproduction with mutant-selective inhibitors (AGI-5198-related AG-120 [Agios]), might represent a worthwhile avenue of exploration in the treatment of IDH1-mutated tumors.
Laser Doppler optical air-data system: feasibility demonstration and systems specifications (1994)

A compact laser Doppler velocimeter with diode-pumped solid-state laser technology at 1.06 μ and a novel solid-block beam-splitting interferometer was demonstrated. This system allows for accurate Doppler velocity measurements even in a vibration environment. A comparison of the backscatter measurements with a backscatter sonde from the University of Wyoming showed excellent agreement. Based on demonstrated performance and technology projection, the system specifications of an optical air-data system at 2.015 μm are determined, and a detailed design concept is presented. In addition, the potential for a multifunctional sensor that can determine air data and detect wind shear and wake vortices is addressed.
An acoustoelectric transistor (1971)

A new kind of three-terminal amplifying device that works on the principle of nonlinear acoustic wave amplification is described. The device has an advantage of simple transistor-like operation while maintaining the long delay times of an acoustic wave amplifier. A piezoelectric semiconductor with three ohmic contacts forms the basic unit; transducers are not required. A theory of device operation, based on a linearized small-signal analysis of acoustic energy transport, is presented along with the resulting analytical expressions for the dc and RF gain and cutoff frequency. Experimental results are given for a test device made of epitaxial GaAs.
An Activated Equivalent of Lactide toward Organocatalytic Ring-Opening Polymerization (2006)

The alpha-lactone equivalent lacOCA exhibits remarkable reactivity compared with lactide in nucleophile-catalyzed ROP. PLAs of controlled molecular weights and narrow polydispersities are typically obtained under mild conditions using DMAP and various protic initiators.
Modeling analysis of the influence of plasticity on high pressure deformation of hcp-Co (2009)

Previously measured in situ x-ray diffraction is used to assess the development of internal elastic strains within grains of a sample of polycrystalline cobalt plastically deformed up to a pressure of 42.6 GPa. An elastoplastic self-consistent polycrystal model is used to simulate the macroscopic flow curves and internal strain development within the sample. Input parameters are single-crystal elastic moduli and their pressure dependence, critical resolved shear stresses, and hardening behavior of the slip and twinning mechanisms which are active in Co crystals. At 42 GPa, the differential stress in hcp-Co is $1.9\ifmmode\pm\else\textpm\fi{}0.1\text{ }\text{GPa}$. The comparison between experimental and predicted data leads us to conclude that: (a) plastic relaxation plays a primary role in controlling the evolution and ordering of the lattice strains; (b) the plastic behavior of hcp-Co deforming under high pressure is controlled by basal and prismatic slip of $⟨a⟩$ dislocations, and either pyramidal slip of $⟨c+a⟩$ dislocations, or compressive twinning, or both. Basal slip is by far the easiest and most active deformation mechanism. Elastoplastic self-consistent models are shown to overcome the limitations of models based on continuum elasticity theory for the interpretation of x-ray diffraction data measured on stressed samples. They should be used for the interpretation of these experiments.
Frequency splitting research of series-parallel type magnetic coupling resonant wireless power transfer system (2018)

Frequency splitting has been widely observed in resonant wireless power transfer. However, there are some misunderstandings concerning this phenomenon in the seriesparallel compensation structure. Based on the circuit theory, this paper adopts the mutual inductance model to analyze the relationship above load power, load resistance and the coupling coefficient in frequency splitting phenomenon, demonstrates that the splitting point is resonant point and split frequency solution of the equation is given. And then, the system quality factor of frequency split point is further defined, system impedance angle derived by inverter in the operative mode of the system frequency splitting is discussed, the limitations of suppressing measures of frequency splitting phenomenon is analyzed. Additional, the applicable range of suppressing measures is pointed out. Finally, the calculations and the experiments confirm these conclusions.
Tissue ablation with 100-fs and 200-ps laser pulses (2002)

The authors used water and human skin tissue to compare the surgical potential of 100-fs and 200-ps laser pulses. For investigation of threshold behavior of 100-fs and 200-ps pulses, the authors use water as a model for tissue. In addition to having a lower threshold, they find that energy deposition is much more consistent with 100-fs pulses. The authors also compared 100-fs and 200-ps laser pulse effects on the surface and in the bulk of human skin tissue. On the surface, pulses with 100-fs and 200-ps duration leave similar size ablation regions. In the bulk both 100-fs and 200-ps pulses produce cavities, however, 100-fs pulses result in a smaller cavity size. On both the surface and in the bulk 100-fs pulses show less collateral tissue damage than 200-ps pulses.
Electrical transport properties of EuO single crystal in relation with growth parameters (1974)

EuO single crystals have been obtained from different runs of growing. Conductivity, photoconductivity, and magnetoresistance measurements were made versus temperature and for magnetic fields up to 7 kOe. The study of the results was correlated to the growing parameters. In order to explain the two types of conductivities observed, a model of conduction is proposed with acceptor levels and two types of donor levels. Des monocristaux d'EuO ont été obtenus avec différents paramètres de croissance. Des mesures de conductivité, photoconductivité et magnétorésistance ont été faites sur ces échantillons, en fonction de la température et pour des champs magnétiques allant jusqu'à 7 kOe. L'étude des résultats a été faite en relation avec les paramètres de croissance. Afin d'expliquer les deux types de comportement observés, nous proposons un modèle de conduction avec des niveaux accepteurs et deux types de niveaux donneurs.