bluuebunny/crossref_metadata_2025_split huggingface dataset:
Archivist! data librarian! asset manager! do the differences really matter?: Reflecting on breakout discussions at the society of American archivists 2014 annual meeting
Authors: Hagenmaier Wendy , Lamparello Dana M. , Baker Karen S. , Mueller Janina , Varner Stewart 
Published: April 2015

EDITOR'S SUMMARYPrompted by proliferating titles for those charged with managing digital data, archivists, embedded data managers, data librarians and data users explored terminology at the 2014 Annual Meeting of the Society of American Archivists. Digital data creation may originate with a submission to a repository, copies ingested at different locations or even reassembly of existing data. Contrary to conventional concepts for archives, data is not complete but may represent one version, a level in a process or point in a workflow. Data must be accessible throughout versions and stages and often across a network of locations. Additional discussions focused on data ownership and responsibility for stewardship, the need for a common vocabulary to support interoperability by managers in varied roles, and the reincarnation of data as it is reused. The session made evident the critical need to reframe communications among those involved with data management to overcome barriers rising from vocabulary differences.
Palladium‐Catalyzed Oxidative Heck Coupling of Cyclic Enones with Simple Arenes by CH Activation
Authors: Chung Leung Gulice Yiu , Juwaini Nur Asyikin Binte , Seayad Jayasree 
Published: April 2015

AbstractA simple catalyst system consisting of Pd(OAc)2 and 3‐nitropyridine for the aerobic oxidative Heck coupling of cyclic enones, in particular challenging unsubstituted cyclic enones, with simple arenes by CH activation was investigated. This novel method was applied to various functionalized arenes and cyclic enones and allowed the synthesis of β‐aryl cyclic enones in modest to high yields.
Metrics of Quality Care in Veterans: Correlation Between Primary‐Care Performance Measures and Inappropriate Myocardial Perfusion Imaging
Authors: Winchester David E. , Kitchen Andrew , Brandt John C. , Dusaj Raman S. , Virani Salim S. , Bradley Steven M. , Shaw Leslee J. , Beyth Rebecca J. 
Published: April 2015

ABSTRACTBackgroundApproximately 10% to 20% of myocardial perfusion imaging (MPI) tests are inappropriate based on professional‐society recommendations. The correlation between inappropriate MPI and quality care metrics is not known.HypothesisInappropriate MPI will be associated with low achievement of quality care metrics.MethodsWe conducted a retrospective cross‐sectional investigation at a single Veterans Affairs medical center. Myocardial perfusion imaging tests ordered by primary‐care clinicians between December 2010 and July 2011 were assessed for appropriateness (by 2009 criteria). Using documentation of the clinical encounter where MPI was ordered, we determined how often quality care metrics were achieved.ResultsAmong 516 MPI patients, 52 (10.1%) were inappropriate and 464 (89.9%) were not inappropriate (either appropriate or uncertain). Hypertension (82.2%), diabetes mellitus (41.3%), and coronary artery disease (41.1%) were common. Glycated hemoglobin levels were lower in the inappropriate MPI cohort (6.6% vs 7.5%; P = 0.04). No difference was observed in the proportion with goal hemoglobin (62.5% vs 46.3% for appropriate/uncertain; P = 0.258). Systolic blood pressure was not different (132 mm Hg vs 135 mm Hg; P = 0.34). Achievement of several other categorical quality metrics was low in both cohorts and no differences were observed. More than 90% of clinicians documented a plan to achieve most metrics.ConclusionsInappropriate MPI is not associated with performance on metrics of quality care. If an association exists, it may be between inappropriate MPI and overly aggressive care. Most clinicians document a plan of care to address failure of quality metrics, suggesting awareness of the problem.
Dynamic programming‐based pico base station sleep mode control in heterogeneous networks
Authors: Wu Gang , Dong Liang , Qin Zhenting , Xu Zhikun 
Published: April 2015

SummaryIn this paper, a sleeping mode control for low power wireless node, that is, pico base station (PBS) in heterogeneous networks, is proposed to save energy cost with adaptation to the time‐varying traffic load. By formulating the sleep mode control problem into the framework of a standard 0/1 knapsack problem, then a dynamic programming scheme for solving the sleeping on/off mode for PBS in heterogeneous networks was investigated. The complexity of the proposed scheme is only in linear order instead of exponential complexity with conventional scheme. Furthermore, the proposed algorithm is verified in dynamic traffic environment, which consists of two kinds of hot‐spot area covered by PBSs. The simulation results show that the proposed scheme can effectively save the system energy consumption during the period of low traffic load. Copyright © 2015 John Wiley & Sons, Ltd.
Timing of flowering and intensity of attack by a butterfly herbivore in a polyploid herb
Authors: König Malin A. E. , Wiklund Christer , Ehrlén Johan 
Published: April 2015

AbstractTiming of plant development both determines the abiotic conditions that the plant experiences and strongly influences the intensity of interactions with other organisms. Plants and herbivores differ in their response to environmental cues, and spatial and temporal variation in environmental conditions might influence the synchrony between host plants and herbivores, and the intensity of their interactions. We investigated whether differences in first day of flowering among and within 21 populations of the polyploid herb Cardamine pratensis influenced the frequency of oviposition by the butterfly Anthocharis cardamines during four study years. The proportion of plants that became oviposited upon differed among populations, but these differences were not related to mean flowering phenology within the population in any of the four study years. Attack rates in the field were also not correlated with resistance to oviposition estimated under controlled conditions. Within populations, the frequency of butterfly attack was higher in early‐flowering individuals in two of the four study years, while there was no significant relationship in the other 2 years. Larger plants were more likely to become oviposited upon in all 4 years. The effects of first flowering day and size on the frequency of butterfly attack did not differ among populations. The results suggest that differences in attack intensities among populations are driven mainly by differences in the environmental context of populations while mean differences in plant traits play a minor role. The fact that within populations timing of flowering influenced the frequency of herbivore attack only in some years and suggests that herbivore‐mediated selection on plant phenology differs among years, possibly because plants and herbivores respond differently to environmental cues.
Effects of hydrological regulation and anthropogenic pollutants on Dongting Lake in the Yangtze floodplain
Authors: Chen Xu , McGowan Suzanne , Xu Lei , Zeng Linghan , Yang Xiangdong 
Published: April 2015

AbstractDongting Lake, a wetland of international importance under the Ramsar Convention, is the hydrological lynchpin of the Yangtze floodplain. It is subjected to eutrophication and heavy metal pollution, but little is known of recent rapid degradation of its aquatic environment and potential causes. Here, we use sedimentary records of particle size, elements and pigments, combined with historical hydrological and limnological data, to assess aquatic environmental changes since ca 1960. Coarse particles in the sediments increased after 2003, while concentrations of K, Li, Al and Mg declined. These changes are probably linked to strong erosion of the downstream riverbed and declining supply of ion‐rich material from the upper Yangtze reaches after the Three Gorges Dam (TGD) began to operate. Furthermore, enrichment of sedimentary heavy metals and total phosphorus since the 1990s can be attributed to the influx of anthropogenic pollutants. Biotic responses are manifested in higher concentrations of fossil algal pigments, especially those from chlorophytes and siliceous algae after the TGD impoundment. Multivariate analysis revealed that changes in fossil pigments were significantly correlated with total phosphorus and Pb and three indicators for hydrological conditions (i.e. coarse particles, water exchange ratio and sediment discharge), indicating that influx of anthropogenic pollutants and hydrological regulation by the TGD are main drivers of algal community change. Our results provide reference conditions for restoration of Dongting Lake and highlight the importance of hydrological connection with the mainstream and pollution control for continuing efforts to restore Dongting Lake, as well as other similar floodplain lakes worldwide. Copyright © 2015 John Wiley & Sons, Ltd.
Burn severity alters peatland moss water availability: implications for post‐fire recovery
Authors: Lukenbach M. C. , Devito K. J. , Kettridge N. , Petrone R. M. , Waddington J. M. 
Published: April 2015

AbstractWildfire is the largest disturbance affecting northern peatlands; however, little is known about how burn severity (organic soil depth of burn) alters post‐fire hydrological conditions that control the recovery of keystone peatland mosses (i.e. Sphagnum). For this reason, we assessed the impact of burn severity on moss water availability by measuring soil tension (Ψ) and surface volumetric moisture content (θ) in burned and unburned portions of a peatland complex 2 years after fire. We found that both high and low burn severity decreased post‐fire water availability by altering peat hydrophysical properties (moisture retention and water repellency). Locations covered by Sphagnum fuscum prior to fire exhibited a decreasing post‐fire water availability with an increasing burn severity. In contrast, the lowest water availability (Ψ > 400 cm, θ < 0·02) was observed in feather mosses that underwent low burn severity (residual branches identifiable). Deep burning (>0·20 m) in peatland margins and burn depths >0·05 m in the middle of the peatland exhibited the highest water availability (Ψ < 60 cm). Locations with low surface θ and high Ψ, notably feather mosses undergoing low burn severity, exhibited minimal moss recolonization. Such areas dominate post‐fire surface cover (~40%) within late successional (mature) peatlands or peatlands located in dry hydrological settings. We argue that such environments are under‐represented in conceptual models of post‐fire recovery. A new conceptual model is proposed in which (1) deep burning is counterbalanced by rapid recolonization and (2) pre‐fire species interact with burn severity to produce substantial lags in post‐fire moss recovery. Copyright © 2015 John Wiley & Sons, Ltd.
Rehydrogenation of Aminoboranes to Amine–Boranes Using H2O: Reaction Scope and Mechanism
Authors: Leitao Erin M. , Manners Ian 
Published: April 2015

AbstractWater has been successfully employed as a reagent with which to rehydrogenate aminoboranes (e.g., iPr2N=BH2, 2,2,6,6‐Me4C5H6N=BH2, and also transient Me2N=BH2 derived from 1/2[Me2N‐BH2]2) to amine–boranes (e.g., iPr2NH·BH3, 2,2,6,6‐Me4C5H6NH·BH3, Me2NH·BH3) in approximately 30 % yield. The conversion to amine–boranes from the corresponding aminoboranes using this method represents an example of a metal‐free, single‐step route for the hydrogenation of the B=N bond. Deuterium labeling studies indicated that the protic hydrogen (N–H) on the rehydrogenated amine–borane was derived from H2O, whereas the third hydridic hydrogen (B–H) on the amine–borane was generated from the formation of a postulated hydride‐bridged intermediate H2B(μ‐H)(μ‐NR2)B(OH)H (R2 = Me2, iPr2, 2,2,6,6‐Me4C5H6), which requires a second equivalent of the starting aminoborane, thus explaining the low yield. Formation of insoluble borates (BxOyHz) provides a driving force for the reaction. Significantly, the yield can be increased by adding a sacrificial source of BH3 (e.g., to ca. 53 % for BH3·THF) or by adding a separate source of H– (e.g., to ca. 95 % for LiBH4) to complement the H+ (from H2O) in a more atom‐efficient reaction.
Sub‐ppt Level Detection of Mercury(II) Based on Anodic Stripping Voltammetry with Prestripping Step at an In Situ Formed Bismuth Film Modified Glassy Carbon Electrode
Authors: Wu Shao‐Hua , Zheng Zhao‐Yan , Zhang Ji‐Fang , Song Zi‐Wang , Fang Lei , Sun Jian‐Jun 
Published: April 2015

AbstractSensitive and selective detection of Hg2+ in solution is a challenging work. An anodic stripping voltammetry with prestripping step at an in situ formed bismuth film modified glassy carbon electrode was proposed for detection of mercury(II) in solution. This prestripping step was able to decrease the background and improve the signal‐to‐noise ratio and thus enhance the sensitivity. With this method, highly sensitive and selective detection of Hg2+ with a ppt‐level detection limit of 0.5 ng L−1 could be achieved. Moreover, this method provides low interference, rapid and extreme simple and convenience, and hold great promise for in situ Hg2+ determination.
Electrochemical Sensor for the Quantification of Dopamine Using Glassy Carbon Electrodes Modified with Single‐Wall Carbon Nanotubes Covalently Functionalized with Polylysine
Authors: Gutiérrez Alejandro , Gasnier Aurélien , Pedano María L. , Gonzalez‐Dominguez Jose Miguel , Ansón‐Casaos Alejandro , Hernández‐Ferrer Javier , Galicia Laura , Rubianes María D. , Martínez María T. , Rivas Gustavo A. 
Published: April 2015

AbstractWe report a dopamine electrochemical sensor based on the modification of glassy carbon electrodes (GCE) with polylysine‐functionalized single‐wall carbon nanotubes (SWCNT‐PLys). The resulting electrodes (GCE/SWCNT‐PLys) showed a significant improvement in the electrooxidation of dopamine with drastic decrease in the peak potentials separation and important enhancement in the associated currents. Dopamine was detected by differential pulse voltammetry‐adsorptive stripping with medium exchange at nanomolar levels even in the presence of high excess of ascorbic and uric acids. The sensor was successfully used for the quantification of dopamine in urine samples enriched with the neurotransmitter.
Determination of Carbendazim by Adsorptive Stripping Differential Pulse Voltammetry Employing Glassy Carbon Paste Electrode Modified with Graphene and Amberlite XAD 2 Resin
Authors: Khare Ninad G. , Dar Riyaz A. , Srivastava Ashwini K. 
Published: April 2015

AbstractGraphene nanosheets (GNS) and amberlite XAD‐2 (XAD2) modified glassy carbon paste electrode (GNS‐XAD2‐GCPE) were fabricated for voltammetric determination of Carbendazim (MBC). GNS was synthesized by Hummer’s method and characterized by SEM, EDAX, and XRD techniques. After optimizing the analytical conditions in 0.4 M citrate buffer (pH 4.0), the peak current was found to be linear in the range of 8.36×10−9 to 4.13×10−6 M (r=0.9986) with detection limit of 3.14×10−9 M (S/N=3) by AdSDPV. The method was validated for the determination of MBC in soil, fruit, blood serum, urine, waste and ground water samples with satisfactory recoveries.
Detection of polycyclic aromatic hydrocarbons (PAHs) in raw menhaden fish oil using fluorescence spectroscopy: Method development
Authors: Pena Edwin A. , Ridley Lauren M. , Murphy Wyatt R. , Sowa John R. , Bentivegna Carolyn S. 
Published: April 2015

Abstract

Raw menhaden fish oil was developed for biomonitoring polycyclic aromatic hydrocarbons (PAHs) using fluorescence spectroscopy. Menhaden (Genus Brevoortia) were collected in 2010 and/or 2011 from Delaware Bay, New Jersey, USA; James River, Virginia, USA; Vermillion Bay, Louisiana, USA (VBLA); and Barataria Bay, Louisiana, USA (BBLA). Barataria Bay, Louisiana received heavy oiling from the Deepwater Horizon oil spill. Method development included determining optimal wavelengths for PAH detection, fish oil matrix interferences, and influence of solvent concentration on extraction. Results showed that some fish oils contained high molecular weight PAH-like compounds in addition to other fluorescent compounds such as albumin and vitamin A and vitamin E. None of these naturally occurring compounds interfered with detection of high molecular weight PAHs. However, data suggested that the lipid component of fish oil was altering fluorescence spectra by supporting the formation of PAH excimers. For example, the most intense excitation wavelength for hydroxypyrene shifted from Ex285/Em430 to Ex340/Em430. Comparison of Deepwater Horizon crude oil and fish oil spectra indicated that some fish oils contained crude oil–like PAHs. Using wavelengths of Ex360/Em430, fish oil concentrations were calculated as 3.92 μg/g, 0.61 μg/g, and 0.14 μg/g for a Delaware Bay sample, BBLA 2011, and VBLA 2011, respectively. Overall, these results supported using menhaden fish oil to track PAH exposures spatially and temporally. Environ Toxicol Chem 2015;34:1946–1958. © 2015 SETAC
A morphometric and taxonomic study of Anthurium augustinum complex (Araceae), endemic to the Brazilian Atlantic Forest
Authors: Cardozo Ana Paula , Godinho Temponi Lívia , Moreira de Andrade Ivanilza , Mayo Simon Joseph , de Camargo Smidt Eric 
Published: April 2015

AbstractThe Anthurium augustinum (Araceae) complex (including A. augustinum K. Koch & Lauche, A. hatschbachii E. G. Gonç., A. jureianum Cath. & Olaio, A. laucheanum K. Koch, A. lhotzkyanum Schott, A. lucidum Kunth, A. maximiliani Schott and A. parvum N.E.Br.) is endemic to the Brazilian Atlantic Forest. Some of these taxa are strictly endemic, with only the type population known, and may occur in sympatry. These species share a leaf morphology in which the blade is deflexed at the petiole insertion and is usually cordate, or rarely rounded at the base due to congenital fusion of the basal lobes. Taxonomic delimitation of the species in this group is difficult because of overlap in diagnostic characters such as deflexed leaf blade, cordate, rounded or semi‐oval leaf base and camptodromous venation. The objective of the study was to test whether these taxa could be recognized using leaf morphometrics. Elliptic Fourier analysis was carried out on a sample of 257 individuals in 12 natural populations. The results of multivariate analyses indicated that in various comparisons, leaf shape was not diagnostic due overlap of variation within and between populations of different species. Consequently, we propose that A. laucheanum, A. lhotzkyanum and A. maximiliani should be regarded as synonyms of A. augustinum, and that the following five species be recognized in this complex: A. augustinum, A. hatschbachii, A. jureianum, A. lucidum and A. parvum. We also formally designate two neotypes (A. laucheanum, A. maximiliani), one lectotype (A. augustinum) and one epitype (A. augustinum). (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Information Flow, Trading Activity and Commodity Futures Volatility
Authors: Clements Adam E. , Todorova Neda 
Published: April 2015

AbstractBased on unique news data relating to gold and crude oil, we investigate how news volume and sentiment, shocks in trading activity, market depth and trader positions unrelated to information flow covary with realized volatility. Positive shocks to the rate of news arrival, and negative shocks to news sentiment exhibit the largest effects. After controlling for the level of news flow and cross‐correlations, net trader positions play only a minor role. These findings are at odds with those of [Wang (2002a). The Journal of Futures Markets, 22, 427–450; Wang (2002b). The Financial Review, 37, 295–316], but are consistent with the previous literature which doesn't find a strong link between volatility and trader positions. © 2015 Wiley Periodicals, Inc. Jrl Fut Mark 36:88–104, 2016
Uncovering phase‐coupled oscillatory networks in electrophysiological data
Authors: van der Meij Roemer , Jacobs Joshua , Maris Eric 
Published: April 2015

AbstractPhase consistent neuronal oscillations are ubiquitous in electrophysiological recordings, and they may reflect networks of phase‐coupled neuronal populations oscillating at different frequencies. Because neuronal oscillations may reflect rhythmic modulations of neuronal excitability, phase‐coupled oscillatory networks could be the functional building block for routing information through the brain. Current techniques are not suited for directly characterizing such networks. To be able to extract phase‐coupled oscillatory networks we developed a new method, which characterizes networks by phase coupling between sites. Importantly, this method respects the fact that neuronal oscillations have energy in a range of frequencies. As a consequence, we characterize these networks by between‐site phase relations that vary as a function of frequency, such as those that result from between‐site temporal delays. Using human electrocorticographic recordings we show that our method can uncover phase‐coupled oscillatory networks that show interesting patterns in their between‐site phase relations, such as travelling waves. We validate our method by demonstrating it can accurately recover simulated networks from a realistic noisy environment. By extracting phase‐coupled oscillatory networks and investigating patterns in their between‐site phase relations we can further elucidate the role of oscillations in neuronal communication. Hum Brain Mapp 36:2655–2680, 2015. © 2015 Wiley Periodicals, Inc.
Characterization of endolymphatic sac tumors and von Hippel–Lindau disease in the International Endolymphatic Sac Tumor Registry
Authors: Bausch Birke , Wellner Ulrich , Peyre Mathieu , Boedeker Carsten C. , Hes Frederik J. , Anglani Mariagiulia , de Campos Jose M. , Kanno Hiroshi , Maher Eamonn R. , Krauss Tobias , Sansó Gabriela , Barontini Marta , Letizia Claudio , Hader Claudia , Schiavi Francesca , Zanoletti Elisabetta , Suárez Carlos , Offergeld Christian , Malinoc Angelica , Zschiedrich Stefan , Glasker Sven , Bobin Serge , Sterkers Olivier , Ba Huy Patrice Tran , Giraud Sophie , Links Thera , Eng Charis , Opocher Giuseppe , Richard Stephane , Neumann Hartmut P. H. ,   for the International Endolymphatic Sac Tumor (ELST) Consortium
Published: April 2015

AbstractBackgroundEndolymphatic sac tumors (ELSTs) are, with a prevalence of up to 16%, a component of von Hippel–Lindau (VHL) disease. Data from international registries regarding heritable fraction and characteristics, germline VHL mutation frequency, and prevalence are lacking.MethodsSystematic registration of ELSTs from international centers of otorhinolaryngology and from multidisciplinary VHL centers’ registries was performed. Molecular genetic analyses of the VHL gene were offered to all patients.ResultsOur population‐based registry comprised 93 patients with ELST and 1789 patients with VHL. The prevalence of VHL germline mutations in apparently sporadic ELSTs was 39%. The prevalence of ELSTs in patients with VHL was 3.6%. ELST was the initial manifestation in 32% of patients with VHL‐ELST.ConclusionPrevalence of ELST in VHL disease is much lower compared to the literature. VHL‐associated ELSTs can be the first presentation of the syndrome and mimic sporadic tumors, thus emphasizing the need of molecular testing in all presentations of ELST. © 2015 Wiley Periodicals, Inc. Head Neck 38: 673–679, 2016