gebhart/patrepeval huggingface dataset:
The specification and enforcement of advanced security policies (2003)

In a distributed multi-user environment, the security policy must not only specify legitimate user privileges but also aid in the detection of the abuse of the privileges and adapt to perceived system threat conditions. This paper advocates extending authorization policy evaluation mechanisms with a means for generating audit data allowing immediate notification of suspicious application level activity. It additionally suggests that the evaluation of the policies themselves adapt to perceived network threat conditions, possibly affected by the receipt of such audit data by other processes. Such advanced policies assist in detecting and responding to intrusion and misuse and they allow more efficient utilization of security services, such as authentication, audit, and notification. We present an authorization framework, which enables the representation and enforcement of advanced security policies. Our approach is based on expanding the policy evaluation mechanism with the ability to generate real time actions, such as checking the current system threat level and sending a notification.
Oxygen Saturation in Premature Neonates with Bronchopulmonary Dysplasia in a Hammock (1995)

Premature neonates with bronchopulmonary dysplasia (BPD) frequently present borderline hypoxemia and the risk for oxygen desaturation may increase in relation to the posture. Our aim was to see if infants with BPD experience severe hypoxemia (SaO2 < 85%) in a hammock, a 'containing' posture considered advantageous to neuromotor and relational development of the preterm. Fifteen pulse oximetry recordings (Ohmeda B105 3760 Pulse Oximeter) were obtained in 15 subjects (range of gestational age and postnatal age 27-30 and 33-48 weeks, respectively; range of birth weight and body weight at entrance to the study 0.64-1.35 and 0.97-2.24 kg, respectively) before, during and after placement in a hammock; each testing period lasted 15 min, and each baby served as his or her own control. BPD preterm infants were receiving oxygen therapy by continuous flow standard nasal cannulas (FiO2 > 25%, < 40%). The analysis of the data, that have a rough gaussian distribution, indicates a worsening of SaO2 in the hammock position. In fact, mean +/- SEM, median and range of the SaO2 values in pre- and posthammock position are comparable, but are significantly different at 99.9% confidence level (CL) in prehammock vs. hammock posture and at 98% CL in posthammock vs. hammock posture. Moreover, the percent of time with SaO2 < 85% during the periods recorded increased about 10 +/- 5% in a hammock (24 +/- 4%), in comparison to pre- (14 +/- 3%) and posthammock position (15 +/- 3%). These results suggest that oxygen-dependent BPD preterm infants in the hammock posture may experience severe hypoxemia that in part limits the possible advantages of the 'containment'.
ChemInform Abstract: Efficient Synthesis of Racemic α‐Aryl‐α‐amino Acid Esters via Aminoalkylation with in situ Generated Glycine Cation Equivalents. (1999)

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.
Bioactive Glass Scaffolds for Bone Regeneration (2007)

Research Article| December 01, 2007 Bioactive Glass Scaffolds for Bone Regeneration Julian R. Jones; Julian R. Jones 1Department of Materials, Imperial College London South Kensington Campus, London SW7 2AZ, UK E-mail: julian.r.jones@imperial.ac.uk; e.gentleman@imperial.ac.uk Search for other works by this author on: GSW Google Scholar Eileen Gentleman; Eileen Gentleman 1Department of Materials, Imperial College London South Kensington Campus, London SW7 2AZ, UK E-mail: julian.r.jones@imperial.ac.uk; e.gentleman@imperial.ac.uk Search for other works by this author on: GSW Google Scholar Julia Polak Julia Polak 2Tissue Engineering and Regenerative Medicine Centre Roderic Hill Building, Imperial College London South Kensington Campus, London SW7 2AZ, UK E-mail: julia.polak@imperial.ac.uk Search for other works by this author on: GSW Google Scholar Author and Article Information Julian R. Jones 1Department of Materials, Imperial College London South Kensington Campus, London SW7 2AZ, UK E-mail: julian.r.jones@imperial.ac.uk; e.gentleman@imperial.ac.uk Eileen Gentleman 1Department of Materials, Imperial College London South Kensington Campus, London SW7 2AZ, UK E-mail: julian.r.jones@imperial.ac.uk; e.gentleman@imperial.ac.uk Julia Polak 2Tissue Engineering and Regenerative Medicine Centre Roderic Hill Building, Imperial College London South Kensington Campus, London SW7 2AZ, UK E-mail: julia.polak@imperial.ac.uk Publisher: Mineralogical Society of America First Online: 09 Mar 2017 Online ISSN: 1811-5217 Print ISSN: 1811-5209 © 2007 by the Mineralogical Society of America Elements (2007) 3 (6): 393–399. https://doi.org/10.2113/GSELEMENTS.3.6.393 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Julian R. Jones, Eileen Gentleman, Julia Polak; Bioactive Glass Scaffolds for Bone Regeneration. Elements 2007;; 3 (6): 393–399. doi: https://doi.org/10.2113/GSELEMENTS.3.6.393 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyElements Search Advanced Search Abstract There is a need for new materials that can stimulate the body's own regenerative mechanisms and heal tissues. Porous templates (scaffolds) are thought to be required for three-dimensional tissue growth. This article discusses bone regeneration and the specifications of an ideal scaffold and the materials that may be suitable. Bioactive glasses have high potential as scaffold materials as they stimulate bone cells to produce new bone, they are degradable in the body and they bond to bone. The two types of bioactive glasses, their mechanisms for bioactivity and their potential for scaffold production are reviewed. Examples of their current clinical use are highlighted. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Rotordynamics of a Two-Phase Flow Twin Screw Pump (2013)

Twin screw pumps are positive displacement machines. Two meshing screws connected by timing gears push the fluid trapped in the screw cavities axially from suction to discharge. Available steady state hydraulic models predict pump performance and axial pressure distribution in the chambers in single- and two-phase flow conditions. However, no model is available for their rotordynamics behavior. Due to the helix angle of the screw, the pressure distribution around the rotor is not balanced, giving rise to both static and dynamic lateral forces. The work presented here introduces a starting point for rotordynamic analysis of twin screw pumps. First, we show that the screw rotor's geometry can be represented by axisymmetric beam elements. Second, we extend the steady state hydraulic model to predict both the static and dynamic lateral forces resulting from the unbalanced pressure field. Finally, hydraulic forces are applied to the rotor to predict static, synchronous, and nonsynchronous responses. Predictions of the dynamic pressure were compared to measurements from the literature and were found to be in good agreement.
The dimeric mixed-ligand titanacarborane sandwich [1-(Cp)-1-Ti-2-(Me)-3-(SiMe3)-2,3-C2B4H4]2 (2000)

The title dimer, bis­[1-cyclo­penta­dienyl-2-methyl-1-titana-3-tri­methylsilyl-2,3-dicarba-closo-hexaborane(6)], [Ti(C5H5)(C6­H16­B4Si)]2, reveals that the centrosymmetric mol­ecule consists of two bent-sandwich titanacarboranes bridged by the B—H—Ti bonds. The average bond distances are Ti—B 2.445 (3), Ti—C(cage) 2.334 (2) and Ti—C(Cp) 2.376 (3) Å, and the corresponding bond angles are Cp—Ti—Cp 163.2 (1) and Cp—Ti—Cb (Cb = C2B3 face) 139.9 (1)°; the Ti—H separations are 2.10 (2) and 2.19 (2) Å.
Supplementary Figure 6 from A Preclinical Assay for Chemosensitivity in Multiple Myeloma (2023)

&lt;p&gt;PDF file - 40K, Computational modeling of in vivo response to therapy.&lt;/p&gt;
Fine-tuning inflammasome activity with a small molecule or ketogenic diet (2015)

Selective and potent inhibition of NLRP3 inflammasome is a promising therapeutic approach for many complex, metabolic, and inflammatory diseases.
Circulating microRNAs as Prognostic and Predictive Biomarkers in Patients with Colorectal Cancer (2016)

MiRNAs are suggested as promising cancer biomarkers. They are stable and extractable from a variety of clinical tissue specimens (fresh frozen or formalin fixed paraffin embedded tissue) and a variety of body fluids (e.g., blood, urine, saliva). However, there are several challenges that need to be solved, considering their potential as biomarkers in cancer, such as lack of consistency between biomarker panels in independent studies due to lack of standardized sample handling and processing, use of inconsistent normalization approaches, and differences in patients populations. Focusing on colorectal cancer (CRC), divergent results regarding circulating miRNAs as prognostic or predictive biomarkers are reported in the literature. In the present review, we summarize the current data on circulating miRNAs as prognostic/predictive biomarkers in patients with localized and metastatic CRC (mCRC).
Mn-Catalyzed 1,6-conjugate addition/aromatization of para-quinone methides (2018)

A series of ferrocenyl triazole ligands have been synthesized and characterized, which proved to be effective for the Mn-catalyzed 1,6-conjugate addition/aromatization of para-quinone methides with good to high yields under mild conditions. This protocol provided an efficient and practical route to the synthetically interesting functionalized quinones, methines and their analogues.
Adenosine receptors and asthma in humans (2008)

According to an executive summary of the GINA dissemination committee report, it is now estimated that approximately 300 million people (5% of the global population or 1 in 20 persons) have asthma. Despite the scientific progress made over the past several decades toward improving our understanding of the pathophysiology of asthma, there is still a great need for improved therapies, particularly oral therapies that enhance patient compliance and that target new mechanisms of action. Adenosine is an important signalling molecule in human asthma. By acting on extracellular G-protein-coupled ARs on a number of different cell types important in the pathophysiology of human asthma, adenosine affects bronchial reactivity, inflammation and airway remodelling. Four AR subtypes (A(1), A(2a), A(2b) and A(3)) have been cloned in humans, are expressed in the lung, and are all targets for drug development for human asthma. This review summarizes what is known about these AR subtypes and their function in human asthma as well as the pros and cons of therapeutic approaches to these AR targets. A number of molecules with high affinity and high selectivity for the human AR subtypes have entered clinical trials or are poised to enter clinical trials as anti-asthma treatments. With the availability of these molecules for testing in humans, the function of ARs in human asthma, as well as the safety and efficacy of approaches to the different AR targets, can now be determined.
Kojic acid as an anti-speck agent. (1988)

The formation of coloured products is knownto occur during the storage and processing of raw noodles (uncooked), this type of browning being called "speck." It has been suggested that the bran contaminating wheat flour plays a significant role in this reaction, but the details of this reaction are not fully understood.1* During the course of searching for new types of anti-
Simple all-fiber-optic component for first-order polarization mode dispersion compensation (2002)

A simple and reliable all-fiber-optic component for a first-order polarization mode dispersion compensator is presented and tested in a 10-Gbit/s transmission system. The proposed component incorporates tunable differential group delay (DGD) provided by several pieces of polarization maintaining (PM) fibers of different DGD that were spliced together with short lengths of single-mode fibers between them. The total DGD of the compensator is determined by the alignment of fast and slow axes of the PM fiber sections. Applying this component as a first-order polarization mode dispersion (PMD) compensator, we demonstrate that a component with seven pieces of PM fiber segments could possibly compensate the first-order PMD up to 63.5 ps with 1-ps steps and a switching time of 300 ms. We also optimize the number of PM fiber sections in this component for a first-order PMD compensation in a 10Gbit/s system based on experimental results.
A Prototype Multicore-fiber Optical Switch Unit for a Large-capacity and High-reliability Network (2013)

A prototype optical switch unit with multi-core fibers (MCFs) was fabricated. Using an MCF link, the prototype successfully demonstrated automatic switching of optical routes when line failure occurred. Its recovery time was 25 ms, which is less than the time specified in the ITU-T standard (50 ms).
The Chemistry of Nitrogen in Humic Acids from Nitric Acid Treated Coal1 (1945)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Chemistry of Nitrogen in Humic Acids from Nitric Acid Treated Coal1H. B. Charmbury, J. W. Eckerd, J. S. LaTorre, and C. R. KinneyCite this: J. Am. Chem. Soc. 1945, 67, 4, 625–628Publication Date (Print):April 1, 1945Publication History Published online1 May 2002Published inissue 1 April 1945https://pubs.acs.org/doi/10.1021/ja01220a035https://doi.org/10.1021/ja01220a035research-articleACS PublicationsRequest reuse permissionsArticle Views88Altmetric-Citations6LEARN 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
Effect of Chalcogens on Electronic and Photophysical Properties of Vinylene-Based Diketopyrrolopyrrole Copolymers (2015)

Three vinylene linked diketopyrrolopyrrole based donor-acceptor (D-A) copolymers have been synthesized with phenyl, thienyl, and selenyl units as donors. Optical and electronic properties were investigated with UV-vis absorption spectroscopy, cyclic voltammetry, near edge X-ray absorption spectroscopy, organic field effect transistor (OFET) measurements, and density functional theory (DFT) calculations. Optical and electrochemical band gaps decrease in the order phenyl, thienyl, and selenyl. Only phenyl-based polymers are nonplanar, but the main contributor to the larger band gap is electronic, not structural effects. Thienyl and selenyl polymers exhibit ambipolar charge transport but with higher hole than electron mobility. Experimental and theoretical results predict the selenyl system to have the best transport properties, but OFET measurements prove the thienyl system to be superior with p-channel mobility as high as 0.1 cm(2) V(-1) s(-1).
Current-Induced Magnetization Switching in MgO Barrier Based Magnetic Tunnel Junctions with CoFeB/Ru/CoFeB Synthetic Ferrimagnetic Free Layer (2006)

We report the intrinsic critical current density (Jc0) in current-induced magnetization switching and the thermal stability factor (E/kBT, where E, kB, and T are the energy potential, the Boltzmann constant, and temperature, respectively) in MgO based magnetic tunnel junctions with a Co40Fe40B20(2nm)/Ru(0.7-2.4nm)/Co40Fe40B20(2nm) synthetic ferrimagnetic (SyF) free layer. We show that Jc0 and E/kBT can be determined by analyzing the average critical current density as a function of coercivity using the Slonczewski's model taking into account thermal fluctuation. We find that high antiferromagnetic coupling between the two CoFeB layers in a SyF free layer results in reduced Jc0 without reducing high E/kBT.
Multimode precoding for MIMO wireless systems (2005)

Multiple-input multiple-output (MIMO) wireless systems obtain large diversity and capacity gains by employing multielement antenna arrays at both the transmitter and receiver. The theoretical performance benefits of MIMO systems, however, are irrelevant unless low error rate, spectrally efficient signaling techniques are found. This paper proposes a new method for designing high data-rate spatial signals with low error rates. The basic idea is to use transmitter channel information to adaptively vary the transmission scheme for a fixed data rate. This adaptation is done by varying the number of substreams and the rate of each substream in a precoded spatial multiplexing system. We show that these substreams can be designed to obtain full diversity and full rate gain using feedback from the receiver to transmitter. We model the feedback using a limited feedback scenario where only finite sets, or codebooks, of possible precoding configurations are known to both the transmitter and receiver. Monte Carlo simulations show substantial performance gains over beamforming and spatial multiplexing.
The incorporation of mono- and bi-functionalized multiwall carbon nanotubes in organic photovoltaic cells (2011)

We have successfully prepared mono- and bi-functionalized multiwall carbon nanotubes (MWCNT) with thiophene, amine and thiophene-amine groups. The dispersion of nanotubes has been enhanced and stable optimized dispersions in organic solvents were obtained. These functionalized nanotubes have been successfully incorporated into bulk heterojunction (BHJ) organic photovoltaic (OPV) cells with a poly (3-hexyl thiophene) (P3HT) and [6, 6]-phenyl-C(61)-butyric acid methyl ester (PCBM) photoactive blended layer. The incorporation of MWCNT with different functional groups, in the active layer, results in different cell performance with respect to a reference cell. A maximum power conversion efficiency of 2.5% is achieved with the inclusion of thiophene functionalized nanotubes. This improvement in the device performance is attributed to an extension of the exciton dissociation volume and charge transport properties through the nanotube percolation network in P3HT/CNT, PCBM/CNT or both phases. This is believed to be due to more efficient dispersion of the functionalized nanotubes within the photoactive composite layer.
Hydrogen cycle employing calcium-bromine and electrolysis. (2002)

No abstract prepared.
3D real time methodology monitoring cement failures in THA (2004)

The present work proposed a methodology to monitor cement microcrack formation in the cemented femoral stem construct using the acoustic emission technique. This technique provides a unique means to automatically tally the number of microcracks, to visualize microcrack distribution, and to animate the progress of crack formation in a given time window of a fatigue test. In this work, the formulation of microcrack source location was derived and a computer program was developed specifically for the proposed application. The program was validated using computer simulation and standard pencil lead break tests. It was found that the mathematical errors complied with the acceptable minimal error. Based on the pencil lead break tests, the average technical error used to estimate the resolution of this technique was 4.7 mm at the present stage. The program was then used to monitor the fatigue damage in precoated cemented femoral hip constructs loaded for a total of more than five million cycles. Two types of microcrack activities were observed in the experiments: Type I and Type II microcracks. A Type I microcrack was a crack that was captured by four or more sensors, and therefore its location was defined uniquely by a set of coordinates. A Type II microcrack was a crack that was captured by three or less sensors, therefore it was unlocatable. Both counts of Type I and Type II microcrack were tallied with respect to the day of fatigue tests. Acoustic emission microcrack graphs were used to visualize the distribution of Type I microcracks in the construct. It was found that the Type I microcracks distributed mainly over the proximal third of the stem. The amount of microcrack events decreased significantly as the number of loading cycles increased.
Radio frequency breakdown and electron confinement time in a stellarator (1986)

Radio frequency ( f=350 kHz) inductive breakdown has been studied in a toroidal stellarator. The time delay between the application of the radio frequency pulse and the buildup of detectable plasma density is measured as a function of the discharge parameters. It is shown that the confinement time of energetic electrons (∼100 eV), produced during the breakdown, may be deduced from the breakdown characteristics. The experimentally determined confinement times are compared with predictions of neoclassical transport theory and are found to have functional dependence on the discharge parameters approximately consistent with plateau scaling, but to be shorter than predicted by the neoclassical diffusion model.
An Introduction to the Bootstrap. (1995)

Introduction The Accuracy of a Sample Mean Random Samples and Probabilities The Empirical Distribution Function and the Plug-In Principle Standard Errors and Estimated Standard Errors The Bootstrap Estimate of Standard Error Bootstrap Standard Errors: Some Examples More Complicated Data Structures Regression Models Estimates of Bias The Jackknife Confidence Intervals Based on Bootstrap Tables Confidence Intervals Based on Bootstrap Percentiles Better Bootstrap Confidence Intervals Permutation Tests Hypothesis Testing with the Bootstrap Cross-Validation and Other Estimates of Prediction Error Adaptive Estimation and Calibration Assessing the Error in Bootstrap Estimates A Geometrical Representation for the Bootstrap and Jackknife An Overview of Nonparametric and Parametric Inference Further Topics in Bootstrap Confidence Intervals Efficient Bootstrap Computations Approximate Likelihoods Bootstrap Bioequivalence Discussion and Further Topics Appendix: Software for Bootstrap Computations References
Noninvasive leakage power tomography of integrated circuits by compressive sensing (2008)

We introduce a new methodology for noninvasive post-silicon characterization of the unique static power profile (tomogram) of each manufactured chip. The total chip leakage is measured for multiple input vectors in a linear optimization framework where the unknowns are the gate leakage variations. We propose compressive sensing for fast extraction of the unknowns since the leakage tomogram contains correlations and can be sparsely represented. A key advantage of our approach is that it provides leakage variation estimates even for inaccessible gates. Experiments show that the methodology enables fast and accurate noninvasive extraction of leakage power characteristics.