gebhart/patrepeval huggingface dataset:
Nucleic acid related compounds. 10. 3'-O-Aminoacyl-2'-deoxyadenosines and 2'-O-aminoacyl-3'-deoxyadenosines related to charged transfer ribonucleic acid termini (1974)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNucleic acid related compounds. 10. 3'-O-Aminoacyl-2'-deoxyadenosines and 2'-O-aminoacyl-3'-deoxyadenosines related to charged transfer ribonucleic acid terminiMorris J. Robins, Roger A. Jones, and Malcolm MacCossCite this: Biochemistry 1974, 13, 3, 553–559Publication Date (Print):January 1, 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://pubs.acs.org/doi/10.1021/bi00700a023https://doi.org/10.1021/bi00700a023research-articleACS PublicationsRequest reuse permissionsArticle Views86Altmetric-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 InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
M2M gossip (2012)

What could or should your car be saying about you to other cars or other people on the road? In this paper, we present some preliminary results from a multi-state in-vehicle driver monitoring system and position it with respect to our work in M2M communication. We propose to improve our current motion object tracking algorithm with the addition of a driver state variable, allowing cars to make predictions about other cars' trajectories with information beyond position, velocity and maps. We envision a transportation future where autonomous and semi-autonomous vehicles could be talking about us to our benefit and advanced driver assist would extend beyond the vehicle to a network of connected cars.
FANTASTIC‐5G: flexible air interface for scalable service delivery within wireless communication networks of the 5th generation (2016)

Abstract 5th generation mobile networks will have to cope with a high degree of heterogeneity in terms of services, mobility, number of devices and so on. Thus, diverse and often contradicting key performance indicators need to be supported, but having multiple radio access technologies for multi‐service support below 6 GHz will be too costly. FANTASTIC‐5G will develop a new multi‐service air interface through a modular design. To allow the system to adapt to the anticipated heterogeneity, some properties need to be pursued, like simplicity, flexibility, scalability, versatility, efficiency and future proofness. Based on these properties, a selected set of use cases and link and network design will be presented. The paper will also comprise validation and system level simulations through some indicative results and will conclude with the overall impact to 5G standardisation. Copyright © 2016 John Wiley &amp; Sons, Ltd.
A Balancing Method for PMEPR Reduction in OFDM Signals (2007)

A relation is established between the strength of a binary code over the alphabet {+1,-1}, and its ability to reduce peak-to-mean envelope power ratio (PMEPR) in n-subcarrier (OFDM) signals. Based on this relation, a method is proposed to deterministically bound PMEPR of such signals using coordinate-wise multiplication by a balancing vector (BV) chosen from a code of given strength. A practical probabilistic scheme considering a small number of candidate codewords is devised. For this scheme, estimates on the PMEPR reduction achievable with arbitrary high probability are derived. In particular, the scheme provides for large n PMEPR of lnn+2.01lnlnn with (ln2)middot(log <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> n) <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> +1 bits of redundancy, the failure probability at most e <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-n</sup> , and testing n/(lnlnn) candidate BVs. Finally, several practical settings are considered. For example, for quaternary phase-shift keying, n=128, the scheme with 36 bits of redundancy (18 redundant subcarriers), by testing only 4 BVs provides over 2 dB PMEPR reduction, for any failure rate below 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2.5</sup>
ChemInform Abstract: The Use of Free Radical Cyclization in the Synthesis of Compounds Related to the Mannostatins. (1995)

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.
Virtual Smart Cards: How to Sign with a Password and a Server. (2015)

Abstract. An important shortcoming of client-side cryptography on consumer devices is the poor protection of secret keys. Encrypting the keys under a human-memorizable password hardly offers any protection when the device is stolen. Trusted hardware tokens such as smart cards can provide strong protection of keys but are cumbersome to use. We consider the case where secret keys are used for digital signatures and propose a password-authenticated server-aided signature Pass2Sign pro-tocol, where signatures are collaboratively generated by a device and a server, while the user authenticates to the server with a (low-entropy) password. Neither the server nor the device store enough information to create a signature by itself or to perform an offline attack on the pass-word. The signed message remains hidden from the server. We argue that our protocol offers comparable security to trusted hardware, but with-out its inconveniences. We prove it secure in the universal composability (UC) framework in a very strong adaptive corruption model where, un-like standard UC, the adversary does not obtain past inputs and outputs upon corrupting a party. This is crucial to hide previously entered pass-words and messages from the adversary when the device gets corrupted. The protocol itself is surprisingly simple: it is round-optimal, efficient, and relies exclusively on standard primitives such as hash functions and RSA. The security proof involves a novel random-oracle programming technique that may be of independent interest. 1
Alternating Direction Method of Multipliers for Constrained Iterative LQR in Autonomous Driving (2022)

In the context of autonomous driving, the iterative linear quadratic regulator (iLQR) is known to be an efficient approach to deal with the nonlinear vehicle model in motion planning problems. Particularly, the constrained iLQR algorithm has shown noteworthy advantageous outcomes of computation efficiency in achieving motion planning tasks under general constraints of different types. However, the constrained iLQR methodology requires a feasible trajectory at the first iteration as a prerequisite when the logarithmic barrier function is used. Also, the methodology leaves open the possibility for incorporation of fast, efficient, and effective optimization methods (i.e., fast-solvers) to further speed up the optimization process such that the requirements of real-time implementation can be successfully fulfilled. In this paper, a well-defined and commonly-encountered motion planning problem is formulated under nonlinear vehicle dynamics and various constraints, and the alternating direction method of multipliers (ADMM) is utilized to determine the optimal control actions leveraging the iLQR. With this development, the approach is able to circumvent the feasibility requirement of the trajectory at the first iteration. An illustrative example of motion planning for autonomous vehicles is then investigated with different driving scenarios taken into consideration, and a noteworthy achievement of high computation efficiency is attained with the proposed development. Comparing with the constrained iLQR algorithm based on the logarithmic barrier function, our proposed method reduces the average computation time by 31.93%, 38.52%, and 44.57% in the three scenarios; compared with the optimization solver IPOPT, our proposed method reduces the average computation time by 46.02%, 53.26%, and 88.43% in the three scenarios. As a result, real-time computation and implementation can be realized through our proposed framework, and thus it provides additional safety to the on-road driving tasks.
Carcinoid Tumors: Imaging Procedures and Interventional Radiology (1996)

The hypervascular nature of carcinoid tumors and their metastases allows a more aggressive role by the radiologist in diagnosis and interventional management. Double-contrast gastrointestinal studies still best define the primary neoplasms. Appendiceal tumors, the most frequent site of carcinoids, frequently escape radiologic detection until large enough to be discovered by computed tomography (CT). Superior mesenteric arteriography of the small bowel and cecum is useful when the scanning procedures are not revealing. The "spokewheel" configuration of the desmoplastic mesenteric masses and lymph node metastases are best seen by CT, whereas hepatic metastases can be demonstrated by CT, CT-angioportography (CTAP), ultrasonography (US), magnetic resonance imaging (MRI), and octreotide scintigraphy. Percutaneous needle biopsy with radiologic guidance confirms the diagnosis of carcinoid tumors and their metastases. Hepatic arteriography is frequently performed in preparation for hepatic embolization or chemoembolization. Hepatic vascular occlusion therapy, the procedure of choice for the management of inoperable carcinoid liver metastases, results in a partial response in at least 50% of patients and a mortality rate of 5%. Chemoembolization with microencapsulated cytotoxic agents and direct percutaneous ethanol injection should also be considered for the treatment of liver metastases.
Electrically Conductive, Reduced Graphene Oxide Structures Fabricated by Inkjet Printing and Low Temperature Plasma Reduction (2019)

Here, an environmentally-friendly and scalable process is reported to synthesize reduced graphene oxide (RGO) thin films for printed electronics applications. The films are produced by inkjet printing GO flakes dispersed binder-free in aqueous solutions followed by treatment with a nonthermal, radio-frequency (RF) plasma containing only argon (Ar) gas. The plasma process is found to heat the substrate to temperatures no greater than 138 °C, enabling RGO to be printed directly on a wide range of temperature-sensitive substrate materials including photo paper. Unlike other low-temperature methods such as electrochemical reduction, plasma reduction is friendly to moisture absorbent materials. Moreover, the plasma treatment can be performed on nonconducting substrates, eliminating the need for film transfer. From an applications perspective, the printed, plasma-reduced RGO exhibits excellent electrical, mechanical, and electrochemical properties. As a technology demonstrator, the working electrodes of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) sensors fabricated from plasma-reduced GO show a sensitivity of 277 ± 80 μA mm<sup>-1</sup> cm<sup>-2</sup>, which is comparable to RGO working electrodes made by electrochemical reduction.
Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at $$\varvec{\sqrt{s} = 8}$$ s = 8 TeV using the ATLAS experiment (2015)

Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of 18.4 fb -1 of pp collisions at s = 8 TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on Rhadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 % confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.
Broadband Discrete Fiber Raman Amplifier with High Differential Gain Operating Over 1.65μm-band (2001)

A high differential-gain (0.08dB/mW), low-noise (&lt;5.0dB), broadband (30nm) and flat-gain (&lt; ± 1dB) fiber Raman amplifier operating over the 1.65μm-band has been demonstrated employing a low-loss highly nonlinear fiber and a broadened pump light source.
Topological information of the electron-density distribution in hydrogen-bonded systems (2004)

Using the topological properties of the experimental electron density distribution r(r) observed in 83 hydrogen bonds [X-H•••O (X=C,N,O)], we have related the total energy density observed at the bond critical point (H CP ) to the H…O interaction potential (U) by means of a proportional relationship Uµ•H CP.1 This function has been successfully checked against several physical and chemical properties and compared to Morse and Buckingham type potentials.Recently, 2 we have undertaken the theoretical study of r(r) calculated for the isolated H•••F interaction and for 79 X-H•••F-Y complexes.The analysis of all these systems lead to three characteristic r(r) regions for distances H•••F ranging from weak van der Waals to strong covalent interactions.While the extreme regions are respectively associated to pure CS and SS interactions, the middle region is associated to the redistribution of r(r) between those electronic states.The analysis carried out with the isolated H•••F interaction has permitted to associate this transit region to internuclear geometries involved in the building of the H-F bonding molecular orbital.The interaction energies of X-H•••F-Y pure CS interactions have been estimated by using the bond degree parameter (B.D. = H CP /r CP ) and the [F•••H•••F]proton transfer geometry has been associated to the local maximum of the electron kinetic energy density (G CP ) max .s2.m9.p3
Measurements of the current density profile with tangential Thomson scattering in RTP (2001)

The electron drift velocity (vd,e) profile is measured with tangential Thomson scattering (TTS). From this, the current density (j) profile is determined, extending over 60% of the plasma diameter (2a) with a spatial resolution of 12% of a. The statistical error of ~10% is in agreement with the expected accuracy based on simulation studies. Two analysis methods are compared and found to agree. Results of TTS in electron cyclotron heated discharges with peaked and hollow j profiles are in good agreement with neo-classical resistivity.
Cs$_2$InAgCl$_6$: A new lead-free halide double perovskite with direct\n band gap (2016)

A$_2$BB$^\\prime$X$_6$ halide double perovskites based on bismuth and silver\nhave recently been proposed as potential environmentally-friendly alternatives\nto lead-based hybrid halide perovskites. In particular, Cs$_2$BiAgX$_6$ (X =\nCl, Br) have been synthesized and found to exhibit band gaps in the visible\nrange. However, the band gaps of these compounds are indirect, which is not\nideal for applications in thin film photovoltaics. Here, we propose a new class\nof halide double perovskites, where the B$^{3+}$ and B$^{+}$ cations are\nIn$^{3+}$ and Ag$^{+}$, respectively. Our first-principles calculations\nindicate that the hypothetical compounds Cs$_2$InAgX$_6$ (X = Cl, Br, I) should\nexhibit direct band gaps between the visible (I) and the ultraviolet (Cl).\nBased on these predictions, we attempt to synthesize Cs$_2$InAgCl$_6$ and\nCs$_2$InAgBr$_6$, and we succeed to form the hitherto unknown double perovskite\nCs$_2$InAgCl$_6$. X-ray diffraction yields a double perovskite structure with\nspace group $Fm\\overline{3}m$. The measured band gap is 3.3 eV, and the\ncompound is found to be photosensitive and turns reversibly from white to\norange under ultraviolet illumination. We also perform an empirical analysis of\nthe stability of Cs$_2$InAgX$_6$ and their mixed halides based on Goldschmidt's\nrules, and we find that it should also be possible to form\nCs$_2$InAg(Cl$_{1-x}$Br$_{x}$)$_6$ for $x&lt;1$. The synthesis of mixed halides\nwill open the way to the development of lead-free double perovskites with\ndirect and tunable band gaps.\n
Interactive out-of-core isosurface extraction (1998)

We present a novel out-of-core technique for the interactive computation of isosurfaces from volume data. Our algorithm minimizes the main memory and disk space requirements on the visualization workstation, while speeding up isosurface extraction queries. Our overall approach is a two-level indexing scheme. First, by our meta-cell technique, we partition the original dataset into clusters of cells, called meta-cells. Secondly, we produce meta-intervals associated with the meta-cells, and build an indexing data structure on the meta-intervals. We separate the cell information, kept only in meta-cells on disk, from the indexing structure, which is also on disk and only contains pointers to meta-cells. Our meta-cell technique is an I/O-efficient approach for computing a k-d-tree-like partition of the dataset. Our indexing data structure, the binary blocked I/O interval tree, is a new I/O-optimal data structure to perform stabbing queries that report from a set of meta-intervals (or intervals) those containing a query value q. Our tree is simpler to implement, and is also more space-efficient in practice than existing structures. To perform an isosurface query, we first query the indexing structure, and then use the reported meta-cell pointers to read from disk the active meta-cells intersected by the isosurface. The isosurface itself can then be generated from active meta-cells. Rather than being a single cost indexing approach, our technique exhibits a smooth trade-off between query time and disk space.
Formal Verification and Validation of UML 2.0 Sequence Diagrams using Source and Destination of Messages (2009)

A major challenge in software development process is to advance error detection to early phases of the software life cycle. For this purpose, the Verification and Validation (V&V) of UML diagrams play a very important role in detecting flaws at the design phase. It has a distinct importance for software security, where it is crucial to detect security flaws before they can be exploited. This paper presents a formal V&V technique for one of the most popular UML diagrams: sequence diagrams. The proposed approach creates a PROMELA-based model from UML interactions expressed in sequence diagrams, and uses SPIN model checker to simulate the execution and to verify properties written in Linear Temporal Logic (LTL). The whole technique is implemented as an Eclipse plugin, which hides the model-checking formalism from the user. The main contribution of this work is to provide an efficient mechanism to be able to track the execution state of an interaction, which allows designers to write relevant properties involving send/receive events and source/destination of messages using LTL. Another important contribution is the definition of the PROMELA structure that provides a precise semantics of most of the newly UML 2.0 introduced combined fragments, allowing the execution of complex interactions. Finally, we illustrate the benefits of our approach through a security-related case study in a real world scenario.
An information-centric architecture for data center networks (2012)

We propose a new Data Center Network (DCN) architecture, based on the principles of Information-Centric Networking (ICN). Our Info-Centric Data Center Network (IC-DCN) addresses many of the pain-points in current DCNs, such as network scalability, host mobility, etc. At the same time, IC-DCN introduces a number of new features to the current information-centric network architectures. We achieve this goal by decoupling the control-plane and data-plane functionalities. The control-plane is implemented in a centralized manner, while the data-plane is fully distributed. We show that IC-DCN effectively addresses many of the ICN challenges in the data center, such as routing scalability, full network utilization, and name space management.
Linear-translate constrained storage VQ for VSPIHT wavelet image compression (2002)

A new constrained storage VQ (CSVQ) structure based on linear transforms and translates of a common root codebook is proposed. The new VQ structure, named LT-CSVQ (linear translate CSVQ) acts as a building block for multistage VQ implementations (LT-CS-MSVQ), and significantly reduces storage requirements from that required in tree-multistage VQ implementations. LT-CS-MSVQ is most appropriate for medium rate multistage VQ implementations, and is applied to the previously proposed vector enhancement of Said and Pearlman's (1996) set partitioning in hierarchical trees (SPIHT) image coder named VSPIHT.