gebhart/patrepeval huggingface dataset:
An Efficient QoS-Constrained Data Aggregation and Processing Approach in Distributed Wireless Sensor Networks (2006)

In this paper an efficient Quality of Service (QoS)- constrained data aggregation and processing approach for distributed wireless sensor networks is introduced and evaluated. The objective of the proposed approach is to aggregate data on the fly at intermediate sensor nodes in order to improve the operational efficiency and effectiveness of the sensor networks, while at the same time still satisfying the latency and measurement quality constraints. One of the key features of the proposed approach is that the task QoS requirements are taken into account to determine when and where to perform the aggregation in a distributed fashion. The performance of the proposed approach is analyzed and evaluated, through modeling and simulation, under different data aggregation scenarios and traffic loads. The impact of several design parameters and tradeoffs on various critical network and application related performance metrics, such as the energy efficiency and end-to-end latency, are also evaluated and discussed.
Plantation test of rare coniferous trees introduced into Zhejiang from Taiwan (2000)

On more than 20 sites in subtropical zone of China carried out the test planting of six conifers introduced from Taiwan ,Chamaecyparis formosensis , Ch .obtwsa var .formosana , Cunninghamia konishii , Taiwania cryptomerioides ,Pseudotsuga wilsoniana and Calocedrus formosana in 1991 ～ 1995 .This paper summarizes the 5-, 6- years results of test plantations of these conifers established in Zhejiang on 4 sites , Qiandaohu of Chunan (2901N , 150 m alt .), Ankou of Suichang (2820N , 680m alt .), Shankang of Longquan (2809N , 500m alt .)and Caoyutang of Jingning (2754N , 1 050 m alt .).All of the six conifers demonstrated well adaptation to site conditions of this area and the Chamaecyparis formosensis performed the best .This species produces a timber wood of high quality and grows in all tests faster than the local principal cultural tree , Cunninghamia lanceolata . The C .konishii and T .cryptomerioides shows a growth rate near that of their generic relatives , C .lanceolata and T .flousiana .It indicates that the above stated 3 conifers can be introduced and wide planted in the tested and the south of tested regions on suitable mountainous land .The remaining species Ch .obtusa var .formosana , P . wilsoniana and Calocedrus formosana grow slowly and current suggestion is only to cultivate them as ornamental trees or in botanical gardens or in arboretums .
Ultraviolet plasmonic enhancement of the native fluorescence of tryptophan on aluminum nano-hole arrays (2020)

Abstract The native fluorescence of biomolecules has been used in analytical chemistry to determine the concentration of an analyte. However, detecting biomolecules based on their intrinsic fluorescence at low concentration is challenging due to their small quantum yield and poor photon stability. Ultraviolet plasmonics have been reported to increase the photon yield and the photon stability of the native fluorescence of biomolecules such as DNA, peptides, and proteins. However, the experimentally reported count rate, or net enhancement factor, is small-with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo><</mml:mo> </mml:math> 80× for DNA and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo><</mml:mo> </mml:math> 14× for amino acids. Here we report native fluorescence enhancement of tryptophan on aluminum hole-arrays. By optimizing excitation geometry and the hole spacings, we are able to achieve a 47× net enhancement factor, the highest reported in the literature for tryptophan molecules. We conducted photobleaching experiments and observed a 2.3× reduction in the fast photon bleaching rate and 1.9× reduction in the slow photon bleaching rate on an aluminum hole-array with 300 nm periodicity compared to an aluminum thin film. The enhancement of the total photon yield reaches 58×, which is a result of the enhanced radiative rate. This study shows that periodic aluminum hole-arrays allow detection of tryptophan at concentration levels lower than previously reported, underpinning further research into label-free biosensing.
Intraoperative assessment of biliary anatomy for prevention of bile duct injury: a review of current and future patient safety interventions (2011)

The critical-view-of-safety approach should be used during laparoscopic cholecystectomy. Intraoperative cholangiography or laparoscopic ultrasound is recommended to be performed routinely. Hyperspectral cholangiography and near-infrared fluorescence cholangiography are promising novel techniques to prevent BDI and thus increase patient safety.
New Q-switch compounds for infrared lasers (1972)

<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</tex> switching of an Nd-glass laser by a solution of the transition metal complex bis-(4-dimethylaminodithiobenzil)-nickel is reported. The special advantage of the new <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</tex> -switch dye lies in its extreme photochemical stability.
[<sup>3</sup>H]U69,593 binding in guinea-pig brain: comparison with [<sup>3</sup>H]ethylketazocine binding at the κ-opioid sites (1988)

[3H]U69,593 and [3H]ethylketazocine (mu + delta suppressed) binding was measured in homogenates of guinea-pig brain. Both ligands bind with high affinity to a single class of opioid sites. The relative equilibrium dissociation constant (KD) for [3H]U69,593 is 1.15 nM, while [3H]ethylketazocine has a KD value of 0.33 nM. Their respective maximum binding capacities are 4.49 and 4.48 pmol/g of wet tissue. Various mu-selective, delta-selective, kappa-selective, and nonselective opioids were tested in competition studies against the binding of [3H]U69,593 or [3H]ethylketazocine (in the presence of mu- and delta-blockers) to measure their relative affinity. [D-Ala2, MePhe4,Gly5-ol]enkephalin (mu-selective) has low affinity (600-3000 nM) and [D-Pen2,D-Pen5]enkephalin and [D-Ser2, Leu5, Thr6]enkephalin (delta-selective) have very low affinities (greater than 20,000 nM) at the sites labelled with [3H]U69,593 or [3H]ethylketazocine. On the other hand, unlabelled U69,593, U50,488H, and tifluadom (all three kappa-selective substances) display high affinity (1-5 nM) at those sites. Nonselective opioids, such as bremazocine, levorphanol, and ethylketazocine show similar affinities at the sites labelled with [3H]U69,593 and at the sites labelled with [3H]ethylketazocine. These data indicate that [3H]U69,593 is a selective high-affinity ligand for the same sites that are labelled with [3H]ethylketazocine (in the presence of mu- and delta-blockers) and that these are kappa-sites.
Multi-objective ranking of comments on web (2012)

With the explosion of information on any topic, the need for ranking is becoming very critical. Ranking typically depends on several aspects. Products, for example, have several aspects like price, recency, rating, etc. Product ranking has to bring the "best" product which is recent and highly rated. Hence ranking has to satisfy multiple objectives. In this paper, we explore multi-objective ranking of comments using Hodge decomposition. While Hodge decomposition produces a globally consistent ranking, a globally inconsistent component is also present. We propose an active learning strategy for the reduction of this component. Finally, we develop techniques for online Hodge decomposition. We experimentally validate the ideas presented in this paper.
Polarization and interactions of colloidal particles in ac electric fields (2008)

Micrometer-sized polystyrene particles form two-dimensional crystals in alternating current (ac) electric fields. The induced dipole-dipole interaction is the dominant force that drives this assembly. We report measurements of forces between colloidal particles in ac electric fields using optical tweezers and find good agreement with the point dipole model. The magnitude of the pair interaction forces depends strongly on the bulk solution conductivity and decreases as the ionic strength increases. The forces also decrease with increasing field frequency. The salt and frequency dependences are consistent with double layer polarization with a characteristic relaxation frequency omega(CD) approximately a(2)/D, where a is the particle radius and D is the ion diffusivity. This enables us to reinterpret the order-disorder transition reported for micrometer-sized polystyrene particles [Lumsdon et al., Langmuir 20, 2108 (2004)], including the dependence on particle size, frequency, and ionic strength. These results provide a rational framework for identifying assembly conditions of colloidal particles in ac fields over a wide range of parameters.
GDB: the Human Genome Database (1998)

The Genome Database (GDB, http://www.gdb.org ) is a public repository of data on human genes, clones, STSs, polymorphisms and maps. GDB entries are highly cross-linked to each other, to literature citations and to entries in other databases, including the sequence databases, OMIM, and the Mouse Genome Database. Mapping data from large genome centers and smaller mapping efforts are added to GDB on an ongoing basis. The database can be searched by a variety of methods, ranging from keyword searches to complex queries. Major functionality extensions in the last year include the ongoing computation of integrated human genome maps, called Comprehensive Maps, and the use of those maps to support positional queries and graphic displays. The capabilities of the GDB map viewer (Mapview) have been extended to include map printing and the graphical display of ad hoc query results. The HUGO Nomenclature Committee continues to curate the proposed and official gene symbols and related data in collaboration with GDB. As genome research shifts its emphasis from mapping to sequencing and functional analysis, the scope of the GDB schema is being extended. We are in the process of adding representations of gene function and expression, and improving our representation of human polymorphism and mutation.
Synthesis of <i>N</i> -Acyl Homoserine Lactone Analogues Reveals Strong Activators of SdiA, the <i>Salmonella enterica</i> Serovar Typhimurium LuxR Homologue (2007)

N-Acyl homoserine lactones (AHLs) are molecules that are synthesized and detected by many gram-negative bacteria to monitor the population density, a phenomenon known as quorum sensing. Salmonella enterica serovar Typhimurium is an exceptional species since it does not synthesize its own AHLs, while it does encode a LuxR homologue, SdiA, which enables this bacterium to detect AHLs that are produced by other species. To obtain more information about the specificity of the ligand binding by SdiA, we synthesized and screened a limited library of AHL analogues. We identified two classes of analogues that are strong activators of SdiA: the N-(3-oxo-acyl)-homocysteine thiolactones (3O-AHTLs) and the N-(3-oxo-acyl)-trans-2-aminocyclohexanols. To our knowledge, this is the first report of compounds (the 3O-AHTLs) that are able to activate a LuxR homologue at concentrations that are lower than the concentrations of the most active AHLs. SdiA responds with greatest sensitivity to AHTLs that have a keto modification at the third carbon atom and an acyl chain that is seven or eight carbon atoms long. The N-(3-oxo-acyl)-trans-2-aminocyclohexanols were found to be less sensitive to deactivation by lactonase and alkaline pH than the 3O-AHTLs and the AHLs are. We also examined the activity of our library with LuxR of Vibrio fischeri and identified three new inhibitors of LuxR. Finally, we performed preliminary binding experiments which suggested that SdiA binds its activators reversibly. These results increase our understanding of the specificity of the SdiA-ligand interaction, which could have uses in the development of anti-quorum-sensing-based antimicrobials.
Noise-robust digit recognition with exemplar-based sparse representations of variable length (2012)

This paper introduces an exemplar-based noise-robust digit recognition system in which noisy speech is modeled as a sparse linear combination of clean speech and noise exemplars. Exemplars are rigid long speech units of different lengths, i.e. no warping mechanism is used for exemplar matching to avoid poor time alignments that would otherwise be provoked by the noise and the natural duration distribution of each unit in the training data is preserved. Speech and noise separation is performed by applying non-negative sparse coding using a separate exemplar dictionary for each labeled unit (in this case half-digits) rather than a single dictionary of all units. This approach does not only provide better classification of speech units but also models the temporal structure of speech and noise more accurately. The system performance is evaluated on the AURORA-2 database. The results show that the proposed system performs significantly better than a comparable system using a single dictionary at positive SNR levels.
New Technique for Fabrication of Two-Dimensional Photonic Bandgap Crystals by Selective Epitaxy (1997)

A two-dimensional (2D) photonic bandgap (PBG) crystal is formed from an array of either rods (pillars) or holes arranged in a periodic lattice. Use of selective epitaxy to fabricate a 2D PBG crystal provides the possibility of obtaining pillars with a high aspect ratio and facets free from surface damage. We have fabricated semiconductor 2D PBG crystals using selective metalorganic vapor phase epitaxy on (111)B GaAs for the first time. The fabricated crystals consist of hexagonal GaAs micropillars arranged in a triangular lattice of 490 nm pitch. Each micropillar has a high aspect ratio (>10) and six smooth, steep sidewalls consisting of {\overline110} facets.
New vessel formation in retinal branch vein occlusion. (1976)

Neovascularization after retinal branch vein occlusion (RBVO) has long been recognized (Foster Moore, 1924; Jensen, 1936) and it has been noted more recently in a number of publications. Krill, Archer, and Newell (I97I) found that three out of 14 patients had new vessel formation after RBVO; Michels and Gass (1974) found seven cases of retinal new vessels in 28 eyes and disc new vessels in two out of seven eyes.
Electron-Spectroscopy Study of Amorphous CN:Ti Films (1999)

Amorphous CN:Ti films deposited by using the reactive magnetron sputtering method were annealed in vacuum under 200 to 600° C. Incorporation of Ti (less than 3 at.%) has brought some new perspectives to the material. Electron-energy-loss spectrum indicates improved conductivity in CN:Ti films as in the insulating CN films. The high-resolution core-level x-ray photoelectron spectroscopy (XPS) studies show that most carbon atoms form homeopolar bonding in as-deposited CN:Ti film. While the N 1s line always shrinks with increasing annealing temperature, the total full width at half maximum of C 1s line decreases only at annealing temperature over 300° C when the broadening due to heterobonding formation is outdone by the effect of increasing order. An enhanced π-band feature in the valence-XPS spectra at high annealing temperatures confirms the graphitisation tendency of this material.
Survey of techniques for prevention and control of congestion in an ATM network (2002)

Some of the congestion control methods commonly considered to be suitable for an ATM (asynchronous transfer mode) network are reviewed. Attention is given to issues such as characteristics of bursty traffic, bandwidth allocation, call admission, and rate control schemes. The high processing speed changes the focus of network design from bandwidth efficiency to processing efficiency. It also moves the focus from feedback control to a preventive forward control. It is concluded that the schemes that are most likely to succeed in ATM emphasize congestion prevention (such as call admittance, bandwidth policing, and rate control) over reactive congestion control based on feedback.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A New EOR Method (2009)

Abstract A new method of enhanced oil recovery has been developed and applied to a sector simulation using some of the data from the South Slattery Field, Minnelusa A reservoir. The new method, termed ASPaM, combines features of CO2 miscible flooding with Alkaline-Surfactant-Polymer (ASP) flooding to produce an enhanced WAG flood. A numerical pre-processor program had to be developed to produce the required mixing zone properties of a CO2 front, which are input to the CMG simulator, STARS. STARS is a chemical flood simulator, but cannot accomodate the solvent model. The preprocessor calculates oil and solvent properties based on the Todd-Longstaff procedure. Sensitivity analysis showed this new method can give a much better recovery in comparison to ASP or CO2 WAG flooding for different depositional environments. ASPaM benefits from high micro and macro sweep efficiencies plus miscible flooding, even for a small ASP slug size. The simulation results revealed the recovery from this scheme is considerably better than ASP and CO2 flooding separately. It showed the recovery can be improved and accelerated by the application of ASPaM, and its performance is a function of the miscibility of the CO2-oil miscible zone and the reduction in IFT at the ASP-oil interface at reservoir conditions. Moreover the water/gas ratio of ASPaM is totally different in scale compared to a typical WAG scheme. A significant acceleration and improvement in recovery is achieved with a 10 % pore volume ASP slug size. This work indicates CO2 flooding and sequestration can be stabilized and enhanced if it combines even with a small ASP slug size. The results so far have been very encouraging.
Singlet Intrachain Exciton Generation and Decay in Poly(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-phenylenevinylene) (1996)

We present excitation spectra, picosecond decay time, and quantum efficiency measurements of the photoluminescence (PL) signal in poly($p$-phenylenevinylene) (PPV). In pristine PPV we observe a constant efficiency with excitation wavelength for singlet intrachain exciton generation, which we model to be close to unity. In contrast, photo-oxidized PPV samples contain a distribution of quenching centers following the profile of the absorption depth, which causes the PL efficiency to decrease with increasing excitation energy, and the PL efficiency and decay time to be no longer simply related.
A power-efficient injection-locked class-E power amplifier for wireless sensor network (2006)

We present an injection-locked Class-E power amplifier (Class-E ILPA) suitable for 2.4-GHz wireless sensor network applications where the maximum transmit-power is typically about 10dBm. In such a low transmit-power application, it is a great challenge to achieve a high transmit efficiency because the driving power and dc power consumption in the previous stage are no more negligible compared with the transmitted signal power. The proposed Class-E ILPA, which is fully integrated in 0.18-μm CMOS technology, achieves the power added efficiency of 44.5% while delivering the output power of 11dBm with drain efficiency of 49.3% at 1.2-V supply voltage. The measured locking range reaches 300MHz with the input driving power of -6dBm.
Novel analgesics and molecular rearrangements in the morphine–thebaine group. Part X. Further acid-catalysed rearrangements of alcohols in the 6,14-endo-ethenotetrahydrothebaine series (1969)

Thebaine-derived alcohols of general structure (4), showing chain branching on the carbon atom adjacent to the alcoholic centre, can be rearranged in acids in a manner different from alcohols in which there is no such chain branching, to give initially derivatives of furano[2′,3′ :6,7] codide (8 and 9) and finally, by a process that can be represented as proceeding through a bridgehead carbonium ion, derivatives of cyclopenteno[3′,2′ :6,7]codide (13 and 14). The αβ-unsaturated carbinol (22) in contrast rearranges through the codeinone (24) and pyranocodide (25) to the thebainone-A derivative (26).
Physical properties of a naturally occurring polyester: poly(β-hydroxyvalerate)/poly(β-hydroxybutyrate) (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical properties of a naturally occurring polyester: poly(β-hydroxyvalerate)/poly(β-hydroxybutyrate)Robert H. Marchessault, H. Morikawa, J. F. Revol, and T. L. BluhmCite this: Macromolecules 1984, 17, 9, 1882–1884Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984https://pubs.acs.org/doi/10.1021/ma00139a047https://doi.org/10.1021/ma00139a047research-articleACS PublicationsRequest reuse permissionsArticle Views183Altmetric-Citations39LEARN 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
Characterisation of moderately acid-treated, size-fractionated montmorillonites using IR and MAS NMR spectroscopy and thermal analysis (1995)

The < 2 µm fractions of Cheto (Arizona, USA) and Jelšový Potok (Slovakia) montmorillonites have been treated with 1 mol dm–3 H2SO4 for periods up to 6 h at 95 °C. The materials obtained were investigated by X-ray fluorescence (XRF), X-ray diffraction (XRD), infrared (IR) spectroscopy, and 29Si and 27Al magic-angle spinning (MAS) NMR spectroscopy. Both clays were partially decomposed under the conditions utilized, but the Cheto montmorillonite, which contained a higher proportion of octahedral magnesium, was more susceptible to acid attack. XRD was insensitive to this level of acid attack but XRF, IR and 29Si MAS NMR revealed the depopulation of the octahedral sheet. The number of acid sites was determined from the thermal desorption of cyclohexylamine and the catalytic activity was evaluated by reacting 2,3-dihydropyran with methanol to yield the tetrahydropyranyl ether. The test reaction was a more sensitive indicator of changes in clay acidity than the values determined by desorption of cyclohexylamine from acid sites.
Solubilities and Dissolution States of a Series of Symmetrical Tetraalkylammonium Salts in Water (1989)

Abstract The solubilities of a series of symmetrical tetraalkylammonium salts, R4NX (R=CH3–n-C8H17, including i-C4H9 and i-C5H11; X=Cl, Br, I, NO3, and ClO4), in water have been determined over the temperature range between 5 and 45 °C. The solubilities of these salts were found to be strongly dependent upon both the chain length of R of the R4N+ cation and upon the partial molar volume of the X− anion. It has been concluded that these solubilities are closely related with the stability of a “cage-like” water structure, which is presumably formed around the R4N+ cation in the solution. A thermodynamic interpretation of the solubility of the R4NX salts was made by using some thermodynamic properties obtained by a differential scanning calorimetry, together with the enthalpy of the solution calculated from the temperature dependence of the solubility.