gebhart/patrepeval huggingface dataset:
Exploiting the Search Computing paradigm in e-government (2011)

People shop online, compare online, book hotels and flights online. This happens because the data needed to complete these tasks are easily accessible and a lot of Web sites allows users to query the Web to obtain enough information to be confident. The aim of this work is to propose a framework tailored to extend the internet revolution to public administration. This work is the first step towards an infrastructure allowing people to know in a very easy way the information they need. This paper exploits the Search Computing paradigm. It is a new way for composing data. While state-of-art search systems answer generic or domain-specific queries, Search Computing enables answering questions via a constellation of cooperating data sources, called search services, which are correlated by means of join operations. Search Computing aims at responding to queries over multiple semantic fields of interest; thus, Search Computing fills the gap between generalized search systems, which are unable to find information spanning multiple topics, and domain-specific search systems, which cannot go beyond their domain limits.
Towards Spam Detection at Ping Servers (2007)

Spam blogs, or splogs feature plagiarized or auto-generated content. They create link farms to promote affiliates, and are motivat ed by the profitability of hosting ads. Splogs infiltrate the blogo sphere at ping servers, systems that aggregate blog update pings. Over the past year, our work has focused on detecting and eliminating splogs. As techniques used by spammers have evolved, we have learned how splog signatures are tied to tools that create them, that the y are begin- ning to be a problem across languages, and that they require a much quicker assessment. Though we continue to address these specific challenges, we discuss our larger goal in this work, of developing a scalable meta-ping filter that detects and eliminates upda te pings from splogs. This will considerably reduce computational require- ments and manual efforts at downstream services (search engines) and involve the community in detecting spam blogs.
Phase diagrams of blends of azide-containing polyoxetanes (2011)

The mutual solubility of polymers based on the azide-containing oxetane monomers 3,3-bis(azidomethyl)oxetane and 3-azidomethyl-3-methyloxetane is studied. The temperatures of melting, crystallization, glass transition; the upper critical solution temperature; and the compositions of coexisting phases for blends of polymers with different molecular masses are determined via differential scanning calorimetry and multiple-beam microinterferometry. On the basis of these data, the phase diagrams of blends are constructed. The melting regions and the metastable and heterogeneous states are determined. The studied systems are shown to have a complex amorphous-crystalline equilibrium and to differ in the location of boundary curves on the phase diagram, depending on the molecular mass of the components. Amorphous separation below the liquidus line in the metastable region with respect to the crystalline equilibrium is experimentally detected. The motion of the figurative point in different regions of the diagram is thoroughly considered. The specifics of structural and morphological organization of systems are examined via electron microscopy.
Simultaneous Dacryocystography and Dacryoscintigraphy Using SPECT/CT in the Diagnosis of Nasolacrimal Duct Obstruction (2012)

Epiphora, an abnormal overflow of tears, is commonly caused by tear drainage system anomalies including nasolacrimal duct obstruction. To assess morphologic abnormalities, dacryocystography by CT is used when CT contrast material is syringed into the lacrimal drainage system. To evaluate the function of the system, dacryoscintigraphy is the most readily available noninvasive method. In the case presented, a 43-year-old man was referred to our clinic with an 8 months' history of indefinite left side epiphora. After performing dacryoscintigraphy, we acquired SPECT/CT images during dacryocystography by CT to establish the surgical indication.
Copolymerization of Maleic Anhydride with 4-Vinyl Epoxycyclohexane (1969)

無水マレイン酸(MAn)と4-ビニルエポキシシクロヘキサン(VECH)とをラジカル開始剤の系で溶液共重合させ,共重合体の性質ならびにエポキシ基の挙動について検討した。その結果,ベンゼンを用いた溶液重合では,各種溶媒に不溶性の重合体が生成し,開始剤の量を増加させたり連鎖移動剤を用いて重合度の低下をはかっても好ましい結果は得られなかった。一方, テトラヒドロフラン, ジオキサン, アセトンを溶媒に用いると,分子量の非常に低い可溶性の重合体の得られることが知られた。これら共重合体を空気中に放置すると次第にエポキシ基が消失し,不溶性のポリマーとなった。また,重合反応中にもエポキシ基と酸無水物とによる副反応が認められ,重合温度を上昇させると次第に顕著となることがわかった。
Conformational Analysis of <scp>l</scp>-Prolines in Water (2007)

The results of the ring conformational analysis of L-proline, N-acetyl-L-proline, and trans-4-hydroxy-L-proline by NMR combined with calculations using density functional theory (DFT) and molecular dynamics (MD) are reported. Accurate values of 1H-1H J-couplings in water and other solvents have been determined. Using a two-site equilibrium model, the Cgamma-endo conformer of L-proline in water has been identified as intermediate between gammaTdelta [twist(Cgamma-endo, Cdelta-exo)] and gammaE [envelope(Cgamma-endo)] and the Cgamma-exo conformer as betaTgamma. Both conformers were equally populated at room temperature. The N-acetyl [cis-rotamer gammaTbeta(80%)/gammaE(20%) and trans-rotamer gammaTbeta(61%)/gammaE(39%)] and 4-hydroxy (gammaEpsilon) derivatives showed significant changes in both the population and the geometries of the preferred ring conformers. The combination of NMR predicted populations with the DFT B3LYP/6-311+G(2d,p)/IEFPCM calculations proved successful, resulting in fairly accurate predictions of J-couplings. Simulations using MD were mostly in favor of the two-site equilibrium model between Cgamma-endo and Cgamma-exo conformers, similar to that used for the analysis of NMR J-couplings. Various force fields examined for MD simulations failed to reproduce the ring conformational geometries and populations of L-proline in water accurately, while significantly better agreement with NMR was found for trans-N-acetyl-L-proline using GROMOS and AMBER force fields.
Beiträge zur Chemie des Bors, 186 Ein Allen‐analoges Diborylamid‐Ion (1987)

Abstract Die Deprotonierung von Bis(diorganylboryl)aminen mit starken Basen wird in den meisten Fällen von einer BN‐Bindungsspaltung begleitet. t Bu 2 B–NH – B t Bu 2 ( 8 ) reagiert mit t BuLi TMEDA unter Deprotonierung zu dem Diborylamid 9 , das nach dem IR‐Spektrum eine lineare, Allen‐analoge Struktur besitzt.
EFFECTS OF CHRONIC ADMINISTRATION OF KANAMYCIN ON CONDITIONED SUPPRESSION TO AUDITORY STIMULUS IN RATS (1976)

The conditioned suppression technique was employed to study the ototoxic effects of chronic administration of the antibiotic, kanamycin. Lever pressing behavior for food reinforcement of rats was suppressed in the presence of an auditory stimulus (sound) or visual stimulus (light) that had been previously paired with electric shocks. Repeated administration of kanamycin at the dose of 400 mg/kg/day for more than 50 days significantly attenuated the conditioned suppression to auditory stimulus but did not attenuate the conditioned suppression to visual stimulus. This finding suggests that the attenuating effect of chronic administration of kanamycin on conditioned suppression to auditory stimulus can be interpreted in terms of the selective action of the drug on the auditory system.
ChemInform Abstract: Organosilicon Metal Compounds: Coordination Chemistry and Catalysis (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.
Asymmetric synthesis polymerization of meso oxiranes and thiiranes (1992)

Abstract The asymmetric synthesis polymerization or “enantiogenic” polymerization of some meso oxiranes, cis ‐dimethyloxirane ( cis ‐DMO) and cyclohexene oxide (CHO), and thiiranes, cis ‐dimethylthiirane ( cis ‐DMT) and cyclohexene sulfide (CHS), initiated with different chiral systems was examined. Strong differences in behaviour were observed between oxiranes and thiiranes depending on the initiator used. The initiators based on ZnEt 2 or CdMe 2 and a chiral diol give optically active polymers from meso thiiranes but fail to induce an asymmetric polymer synthesis with meso oxiranes. A new chiral initiator based on ZnEt 2 and (1S,2R)‐ephedrine allowed us to prepare optically active poly CHOs, which can be fractionated into fractions exhibiting opposite optical activities. © 1992 Wiley‐Liss, Inc.
X-ray Photoelectron Spectroscopy of Metal-Exchanged Na-ZSM-5 Zeolites (1995)

Medium-pore ZSM-5 zeolites exchanged with divalent and trivalent transition metal ions have been considered recently by many investigators as catalysts for the selective reduction of nitrogen oxides. In this work a series of NaZSM-5 samples exchanged by divalent ions Co2+, Ni2+, Pd2+, Cu2+, and trivalent ions Fe3+, La3+ and Ce3+ was examined in situ by XPS. In the high Si/Al ratio ZSM-5 the divalent ions exchanged approximately one to one with respect to the Al3+-ions. The exchanged cobalt ions remained in the zeolite lattice even after high temperature (600°C) alternating oxyreductive treatments with oxygen and hydrogen. Copper migrates out of the framework during reductive treatment with hydrogen and is reduced to the metallic state. Nickel and palladium appear to migrate out to the external surface of the zeolite crystallites during high temperature oxidation and, subsequently, are reduced completely by treatment in hydrogen. Iron exchanged from a ferric solution is incorporated as ferric ions after oxidative treatment and is reduced to the ferrous state by hydrogen at high temperature without migrating out of the framework. The trivalent La-ions remain invariant in all treatments. The Ce-ions are present mainly as tetravalent after the oxidative treatment and are reduced completely to trivalent after treatment in hydrogen at 600°C. Both La- and Ce-ions appear to resist migration out of the framework. No difference could be detected in the behavior of Cu-ions exchanged into HZSM-5, NaZSM-5 and LaNaZSM-5.
Specificity of chimeric scFv (mGuy13VH/huVL) ELISA reactivity of overnight induced bacterial culture supernatant containing chimeric scFv (mGuy13VH/huVL) after 3 rounds of selection on SAI/II antigen (2011)

<b>Copyright information:</b>Taken from "Generation of human antibody fragments against using a phage display chain shuffling approach"BMC Biotechnology 2005;5():4-4.Published online 25 Jan 2005PMCID:PMC548521.Copyright © 2005 Kupper et al; licensee BioMed Central Ltd. A: 96 individual scFvs on SAI/II coated ELISA plates. B: the same 96 scFvs on BSA coated ELISA plates
Ring Opening of Substituted Cyclopropylidenes to Cyclic Allenes (1997)

Density functional theory and ab initio quantum mechanical computations elucidated the ring opening of trans- and cis-2,3-dimethylcyclopropylidene (1b and 1c, respectively), bicyclo[4.1.0]hept-7-ylidene (3), and bicyclo[3.1.0]hex-6-ylidene (7). The B3LYP geometry optimizations employed a DZP basis set. Single-point energies were evaluated at B3LYP/TZP. The ring-opening barrier leading to allene, around 5 kcal mol-1 for the parent cyclopropylidene (1a), is lowered by 2,3-cis-dimethyl substitution to almost zero for 1c. The larger barrier, 4.2 kcal mol-1, for the 2,3-trans compound (1b) is due to repulsive H···H interactions in the ring-opening transition structure TS2. While isomerization of bicyclo[3.1.0.]hex-6-ylidene (7) to 1,2-cyclohexadiene (8) proceeds almost spontaneously, the analogous cyclopropylidene ring opening of bicyclo[4.1.0.]hept-7-ylidene (3) to 1,2-cycloheptadiene (4) has an unusually high activation energy of 14.6 kcal mol-1. This results from unfavorable conformational changes in the cyclohexane moiety of 3 during the reaction. Intramolecular carbene CH insertions to give tricyclo[4.1.0.02,7]heptane and tricyclo[4.1.0.03,7]heptane are characterized by lower barriers, 6.4 and 9.1 kcal mol-1, respectively, and these are the products observed experimentally. The geometries and vibrational frequencies of cyclic allenes 4 and 8 were computed with B3LYP, with second-order Møller−Plesset perturbation theory (MP2), and with the coupled-cluster method involving single and double excitations using the 6-31G* and DZP basis sets. Both Runge and Sander (νas = 1829 cm-1) (Tetrahedron Lett. 1986, 27, 5835) as well as Wentrup et al. (νas = 1886 cm-1) (Angew. Chem., Int. Ed. Engl. 1983, 22, 542) claimed to have spectroscopic evidence for 1,2-cyclohexadiene (8). The calculated values for νas(CC) (1718−1838 cm-1) favor the experimental data of Runge and Sander.
RRANN: a hardware implementation of the backpropagation algorithm using reconfigurable FPGAs (2002)

Field programmable gate arrays (FPGAs) are an excellent technology for implementing neural networking hardware. This paper presents the run-time reconfiguration artificial neural network (RRANN). RRANN is a hardware implementation of the backpropagation algorithm that is extremely scalable and makes efficient use of FPGA resources. One key feature is RRANN's ability to exploit parallelism in all stages of the backpropagation algorithm including the stage where errors are propagated backward through the network. This architecture has been designed and implemented on Xilinx XC3090 FPGAs, and its performance has been measured.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Volume MR angiography: methods to achieve very short echo times. (1990)

Angiographic displays of cerebral vessels can be generated with single-excitation three-dimensional magnetic resonance imaging. Differentiation of true stenosis from artifactual signal loss, due to dephasing effects from fast or nonconstant blood flow and field inhomogeneities, poses a significant clinical problem that can be largely resolved with the use of very short echo times (TEs). A three-dimensional imaging technique was developed that allows TEs of 3.1 msec without and 4.5 msec with first-order flow compensation gradients. The short TEs were achieved with short asymmetric radio-frequency pulses, gradients of minimal duration, and fractional echoes. Significantly improved images of normal tortuous vessels with fast flow were obtained. With this method, accuracy in depicting the vessel lumen and confidence in the findings were markedly increased.
Erratum - Catalogue of Galactic Globular Cluster Surface Brightness Profiles (1995)

Search Bar to Enter New Query quick field: Author First Author Abstract Year Fulltext Select a field or operator abstract abstract only acknowledgements affiliation arXiv category author count author bibcode bibliographic group bib abbrev, e.g. ApJ body of article data archive collection citation count doctype doi entdate first author fulltext identifier inst keyword object orcid page property publication full name date published title volume year citations() pos() references() reviews() similar() topn() trending() useful() single wildcard: ? wildcard: * exact match: = All Search Terms Your search returned 0 results Your search returned 0 results
Statecraft and Power: Essays in Honor of Harold W. Rood (1994)

These essays on strategy, war, and statecraft have been written during the current reassessment of United States' national strategy. But they also take strategic thinking back to certain principals and interests which have guided America before, during, and after the Cold War. Co-published with The Institute for Public Policy.
Indexed BDDs: algorithmic advances in techniques to represent and verify Boolean functions (1997)

A new Boolean function representation scheme, the Indexed Binary Decision Diagram (IBDD), is proposed to provide a compact representation for functions whose Ordered Binary Decision Diagram (OBDD) representation is intractably large. We explain properties of IBDDs and present algorithms for constructing IBDDs from a given circuit. Practical and effective algorithms for satisfiability testing and equivalence checking of IBDDs, as well as their implementation results, are also presented. The results show that many functions, such as multipliers and the hidden-weighted-bit function, whose analysis is intractable using OBDDs, can be efficiently accomplished using IBDDs. We report efficient verification of Booth multipliers, as well as a practical strategy for polynomial time verification of some classes of unsigned array multipliers.
Metal‐Free and Metallated Polymers: Properties and Photovoltaic Performance (2012)

Abstract We have studied the properties of organic and organometallic polymers based on a similar chemical structure to elucidate the influence of the metal center on the optical and electronic properties of the polymers as well as their photovoltaic performance. Detailed characterization of the optical properties of both polymers is performed and film morphology and photovoltaic performance are compared. Metal‐containing polymers exhibit red‐shifted absorption and under optimal processing conditions exhibit different film morphology compared with the metal‐free ones. Our results indicate that organometallic polymers represent a promising class of compounds for improved performance in photovoltaic cells.
Effects of Lipid Chain Lengths in α-Galactosylceramides on Cytokine Release by Natural Killer T Cells (2004)

Glycolipid presentation by CD1 proteins has emerged as an important aspect of antigen recognition, and presentation of alpha-glycosylceramides by CD1d to natural killer T cells has become a central focus in understanding how glycolipid presentation can influence immune responses. An alpha-galactosylceramide containing relatively long lipid chains has been the subject of intense study because, when presented by CD1d to natural killer T cells, it stimulates the release of both proinflammatory and immunomodulatory cytokines. Using an efficient synthesis of alpha-galactosylceramides, we have prepared a series of glycolipids in which the lipid chain lengths have been incrementally varied. The responses of natural killer T cells to these glycolipids have been determined, and we have found that truncation of the phytosphingosine lipid chain increases the relative amounts of immunomodulatory cytokines released. In similar fashion, the length of the acyl chain in alpha-galactosylceramides influences cytokine release profiles.
A role for focal adhesion kinase in cardiac mitochondrial biogenesis induced by mechanical stress (2010)

We studied the implication of focal adhesion kinase (FAK) in cardiac mitochondrial biogenesis induced by mechanical stress. Prolonged stretching (2-12 h) of neonatal rat ventricular myocytes (NRVM) upregulated the main components of mitochondrial transcription cascade [peroxisome proliferator-activated receptor coactivator-1 (PGC-1α), nuclear respiratory factor (NRF-1), and mitochondrial transcription factor A]. Concomitantly, prolonged stretching enhanced mitochondrial biogenesis [copy number of mitochondrial DNA (mtDNA), content of the subunit IV of cytochrome oxidase, and mitochondrial staining-green fluorescence intensity of Mitotracker green] and induced the hypertrophic growth (cell size and atrial natriuretic peptide transcripts) of NRVM. Furthermore, the stretching of NRVM enhanced phosphorylation, nuclear localization, and association of FAK with PGC-1α. Recombinant FAK COOH-terminal, but not the NH(2)-terminal or kinase domain, precipitated PGC-1α from nuclear extracts of NRVM. Depletion of FAK by RNA interference suppressed the upregulation of PGC-1α and NRF-1 and markedly attenuated the enhanced mitochondrial biogenesis and hypertrophic growth of stretched NRVM. In the context of energy metabolism, FAK depletion became manifest by a reduction of ATP levels in stretched NRVM. Complementary studies in adult mice left ventricle demonstrated that pressure overload upregulated PGC-1α, NRF-1, and mtDNA. In vivo FAK silencing transiently attenuated the upregulation of PGC-1α, NRF-1, and mtDNA, as well as the left ventricular hypertrophy induced by pressure overload. In conclusion, activation of FAK signaling seems to be important for conferring enhanced mitochondrial biogenesis coupled to the hypertrophic growth of cardiomyocytes in response to mechanical stress, via control of mitochondrial transcription cascade.
ChemInform Abstract: Synthesis of Phosphonamides and Phosphinamides Related to Pepstatin. (1987)

Abstract The title compounds (III) are prepared by treatment of (I) with (IV)/Et3N to give the azides (II), followed by ammonolysis (due to their instability, only (IIa) can be isolated in low yield).
Positive bronchoalveolar lavage pepsin assay associated with viral and fungal respiratory infections in children with chronic cough (2021)

BAL pepsin is associated with a positive BAL viral PCR or fungal culture. Lack of correlation between pepsin-positivity and pH-impedance parameters or EGD pathology suggests microaspiration may be due to an acute event (such as a respiratory infection) rather than chronic gastroesophageal reflux disease. This may be especially true in the presence of a positive viral panel or fungal culture when a BAL pepsin is obtained.
Frequency Packing and Multiuser Detection for CPMs: How to Improve the Spectral Efficiency of DVB-RCS2 Systems (2012)

We consider a frequency division multiplexed system where each user adopts a continuous phase modulation (CPM) and multiuser detection is employed at the receiver side. The spectral efficiency (SE) is used as a performance measure to compare, from an information-theoretic point of view, different modulation formats. More precisely, we consider the new CPM formats recently included in the DVB-RCS2 standard. We describe a framework for computing the information rate (IR) and the SE of such systems, and use it for optimizing the channel spacing between adjacent users and the CPM phase response. Our analysis reveals that modulation formats adopted in the DVB-RCS2 standard are suboptimal in terms of SE, while if we allow multiuser detection excellent performance can be achieved by using simple binary formats and highly frequency packed signals. Furthermore, we consider practical schemes, where CPMs are serially concatenated with an outer code, and a low-complexity multiuser receiver is employed, showing that the theoretical limits predicted by the IR analysis can be approached.