bluuebunny/crossref_metadata_2025_split huggingface dataset:
Laser‐assisted atom probe tomography of MBE grown GaN nanowire heterostructures
Authors: Sanford N. A. , Blanchard P. T. , Brubaker M. , Bertness K. A. , Roshko A. , Schlager J. B. , Kirchhofer R. , Diercks D. R. , Gorman B. 
Published: February 2014

AbstractLaser‐assisted atom probe tomography (L‐APT) was performed on GaN nanowires (NWs) and axial GaN/InGaN nanowire heterostructures. All samples were grown by MBE on Si(111) substrates. The laser pulse energy (PE) at 355 nm used in L‐APT analysis of GaN NWs was restricted to the range of 2‐50 fJ in order to recover the correct GaN stoichiometry within experimental uncertainty. Higher PE at 355 nm generally returns an apparent (but unphysical) deficit in N composition for GaN. Axial GaN/InGaN NW heterostructures were also grown by MBE. In these experiments a GaN NW segment was first grown at 820 °C followed by GaN‐capped InGaN marker layers grown variously at 585 and 615 °C. The capped InGaN markers were separated by GaN spacer layers. L‐APT revealed that under certain growth conditions, In diffused throughout the quantum well region. These observations were corroborated by HRTEM. Moreover, L‐APT performed on the GaN/InGaN NWs with PE = 2 fJ revealed that regions with dispersed In showed an (unphysical) N deficit but regions where the InGaN marker layers remained localized showed the approximately correct stoichiometry. Interestingly, even when the In markers remain localized, background In is still found in the GaN spacers between the markers. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
RIAPPA: a Robust Identity Assignment Protocol for P2P overlays
Authors: Caubet Juan , Esparza Oscar , Muñoz José L. , Alins Juanjo , Mata‐Díaz Jorge 
Published: February 2014

ABSTRACTPeer‐to‐peer (P2P) overlay networks have been proposed to solve routing problems of big distributed infrastructures, even for Internet scale. But the research community has been questioning the security of these networks for years. Most prior work in security services was focused on trust and reputation systems, anonymity, and secure routing. However, the proper management of identities in overlays is an important prerequisite to provide most of these security services. In this paper, we propose a protocol to control the access to a P2P overlay and to assign identities in a secure way; all this preserving the anonymity of users. This protocol involves two trusted third parties (TTPs), thanks to which it is possible to preserve the users’ anonymity within the network without losing traceability. Users are authenticated by a TTP using real‐world digital certificates, they select their network identifier jointly with the other TTP, and finally, the two TTPs issue the internal certificate to them. The protocol also provides revocability and protection against Sybil attacks, Eclipse attacks, whitewashers, and so on. A detailed protocol description is presented, and a performance and security analysis of the protocol is also provided. Copyright © 2014 John Wiley & Sons, Ltd.
Non-uniqueness of weak solutions to the wave map problem
Authors: Widmayer Klaus 
Published: February 2014

In this note we show that weak solutions to the wave map problem in the energy-supercritical dimension 3 are not unique. On the one hand, we find weak solutions using the penalization method introduced by Shatah [12] and show that they satisfy a local energy inequality. On the other hand we build on a special harmonic map to construct a weak solution to the wave map problem, which violates this energy inequality.
Finally we establish a local weak-strong uniqueness argument in the spirit of Struwe [15] which we employ to show that one may even have a failure of uniqueness for a Cauchy problem with a stationary solution. We thus obtain a result analogous to the one of Coron [2] for the case of the heat flow of harmonic maps.
Note on the triad interactions of homogeneous turbulence
Authors: Moffatt H. K. 
Published: February 2014

AbstractTriad interactions, involving a set of wave-vectors $\{\pm \boldsymbol {k}, \pm \boldsymbol {p}, \pm \boldsymbol {q}\}$, with $ \boldsymbol {k} + \boldsymbol {p}+ \boldsymbol {q}=0$, are considered, and the results of triad truncation are compared with the results of exact Euler evolution starting from the same initial conditions. The essential two-dimensionality of the triad interaction is used to separate the problem into two parts: a nonlinear two-dimensional flow problem in the triad plane, and a linear problem of ‘passive scalar’ type for the evolution of the component of velocity perpendicular to this plane. Several examples of triad evolution are presented in detail, and the marked contrast with Euler evolution is demonstrated. It is known that energy and helicity are conserved under triad truncation; it is shown that the ‘in-plane’ energy and enstrophy are also conserved. However, it is also shown that, in general, the evolution of the vorticity under triad truncation cannot be represented as transport by any divergence-free velocity field, with the consequence that the detailed topology of the vorticity field is not conserved under this truncation.
Tradeoff between reproduction and resistance evolution to Bt-toxin in Helicoverpa armigera: regulated by vitellogenin gene expression
Authors: Zhang W.N. , Xiao H.J. , Liang G.M. , Guo Y.Y. , Wu K.M. 
Published: February 2014

AbstractEvolution of resistance to insecticides usually has fitness tradeoffs associated with adaptation to the stress. The basic regulation mechanism of tradeoff between reproduction and resistance evolution to Bacillus thuringiensis (Bt) toxin in the cotton bollworm, Helicoverpa armigera (Ha), based on the vitellogenin (Vg) gene expression was analyzed here. The full-length cDNA of the Vg gene HaVg (JX504706) was cloned and identified. HaVg has 5704 base pairs (bp) with an open reading frame (ORF) of 5265 bp, which encoded 1756 amino acid protein with a predicted molecular mass of 197.28 kDa and a proposed isoelectric point of 8.74. Sequence alignment analysis indicated that the amino acid sequence of HaVg contained all of the conserved domains detected in the Vgs of the other insects and had a high similarity with the Vgs of the Lepidoptera insects, especially Noctuidae. The resistance level to Cry1Ac Bt toxin and relative HaVg mRNA expression levels among the following four groups: Cry1Ac-susceptible strain (96S), Cry1Ac-resistant strain fed on artificial diet with Bt toxin for 135 generations (BtR stands for the Cry1Ac Bt resistance), progeny of the Cry1Ac-resistant strain with a non-Bt-toxin artificial diet for 38 generations (CK1) and the direct descendants of the 135th-generation resistant larvae which were fed on an artificial diet without the Cry1Ac protein (CK2) were analyzed. Compared with the 96S strain, the resistance ratios of the BtR strain, the CK1 strain and the CK2 strain were 2917.15-, 2.15- and 2037.67-fold, respectively. The maximum relative HaVg mRNA expression levels of the BtR strain were approximately 50% less than that of the 96S strain, and the coming of maximum expression was delayed for approximately 4 days. The overall trend of the HaVg mRNA expression levels in the CK1 strain was similar to that in the 96S strain, and the overall trend of the HaVg mRNA expression levels in the CK2 strain was similar to that in the BtR strain. Our results suggest that the changes in reproduction due to the Bt-toxin resistance evolution in the BtR strain may be regulated by the Vg gene expression. The down-regulation of HaVg at the early stages resulted in a period of delayed reproduction and decreased fecundity in the BtR strain. This performance disappeared when the Bt-toxin selection pressure was lost.
Increased production of mitochondrial reactive oxygen species and reduced adult life span in an insecticide-resistant strain ofAnopheles gambiae
Authors: Otali D. , Novak R.J. , Wan W. , Bu S. , Moellering D.R. , De Luca M. 
Published: February 2014

AbstractControl of the malaria vectorAn. gambiaeis still largely obtained through chemical intervention using pyrethroids, such as permethrin. However, strains ofAn. gambiaethat are resistant to the toxic effects of pyrethroids have become widespread in several endemic areas over the last decade. The objective of this study was to assess differences in five life-history traits (larval developmental time and the body weight, fecundity, hatch rate, and longevity of adult females) and energy metabolism between a strain ofAn. gambiaethat is resistant to permethrin (RSP), due to knockdown resistance and enhanced metabolic detoxification, and a permethrin susceptible strain reared under laboratory conditions. We also quantified the expression levels of five antioxidant enzyme genes:GSTe3, CAT, GPXH1, SOD1, andSOD2. We found that the RSP strain had a longer developmental time than the susceptible strain. Additionally, RSP adult females had higher wet body weight and increased water and glycogen levels. Compared to permethrin susceptible females, RSP females displayed reduced metabolic rate and mitochondrial coupling efficiency and higher mitochondrial ROS production. Furthermore, despite higher levels ofGSTe3andCATtranscripts, RSP females had a shorter adult life span than susceptible females. Collectively, these results suggest that permethrin resistance alleles might affect energy metabolism, oxidative stress, and adult survival ofAn. gambiae. However, because the strains used in this study differ in their genetic backgrounds, the results need to be interpreted with caution and replicated in other strains to have significant implications for malaria transmission and vector control.
Enhancing writing pedagogy with learner corpus data
Authors: Cotos Elena 
Published: February 2014

AbstractLearner corpora have become prominent in language teaching and learning, enhancing data-driven learning (DDL) pedagogy by promoting ‘learning driven data’ in the classroom. This study explores the potential of a local learner corpus by investigating the effects of two types of DDL activities, one relying on a native-speaker corpus (NSC) and the second combining native-speaker and learner corpora. Both types of activities aimed at improving second language writers’ knowledge of linking adverbials and were based on a preliminary analysis of adverbial use in the local learner corpus produced by 31 study participants. Quantitative and qualitative data, obtained from writing samples, pre/post-tests, and questionnaires, were converged through concurrent triangulation. The results showed an increase in frequency, diversity and accuracy in all participants’ use of adverbials, but more significant improvement was made by the students who were exposed to the corpus containing their own writing. The findings of this study are thus interpreted as suggestive that combining learner and native-speaker data is a feasible and effective practice, which can be readily integrated in DDL-based instruction with positive impact.
A Mixed-methods Pilot Study of Disaster Preparedness and Resiliency Among Faith-based Organizations
Authors: Muller Valerie M. , Burke Rita V. , Berg Bridget M. , Lin Ann C. , Upperman Jeffrey S. 
Published: February 2014

AbstractIntroductionFaith-based organizations represent a source of stability and are an established presence in a community. They frequently serve their community following disasters. They are not formally included or identified as a disaster resource; thus, there is an opportunity to increase the effectiveness with which faith-based organizations prepare for and respond to disasters.ProblemThis pilot study aimed to assess perceptions of the level of disaster preparedness and resiliency among faith-based organizations as a first step in understanding how to improve disaster preparedness and resiliency among these organizations and their communities.MethodsSurvey and semi-structured interviews were conducted with six faith-based organizations, one with a leader and one with a staff member. Frequency distributions of survey questions were obtained. Interviews were transcribed and thematic analysis was supported by analytical software, ATLAS. ti.ResultsResults of the survey indicated strong social networks among congregation and community members. However, half of the members indicated that they did not socialize often with other races and other neighborhoods. Additionally, trust of other groups of people was generally low. Themes that emerged from qualitative analysis were: (1) perceived disaster preparedness and resiliency; (2) barriers to community preparedness and resiliency; (3) lessons learned from past disasters; (4) social services and networks; and (5) willingness to be prepared.ConclusionsThe results suggest that there is a need for interventions to improve disaster preparedness and resiliency among faith-based organizations.MullerV,BurkeR,BergB,LinA,UppermanJ.A mixed-methods pilot study of disaster preparedness and resiliency among faith-based organizations.Prehosp Disaster Med.2014;29(2):1-7.
Understanding the Characteristics of Patient Presentations of Young People at Outdoor Music Festivals
Authors: Hutton Alison , Ranse Jamie , Verdonk Naomi , Ullah Shahid , Arbon Paul 
Published: February 2014

AbstractOutdoor music festivals are unique events given that they are, for the most part, bounded and ticketed, and alcohol is served. They frequently have a higher incidence of patient presentations when compared with similar types of mass gatherings. Often, however, single events are reported in the literature, making it difficult to generalize the findings across multiple events and limiting the understanding of the “typical” patient presentations at these mass gatherings. The aim of this paper was to understand the characteristics of young people who have presented as patients to on-site health care at outdoor music festivals in Australia, and the relative proportion and type of injury and illness presentations at these events. This research used a nonexperimental design, utilizing a retrospective review of patient report forms from outdoor music festivals. Data were collected from 26 outdoor music festivals across four States of Australia during the year 2010. Females presented at greater numbers than males, and over two-thirds presented with minor illnesses, such as headaches. Males presented with injuries, in particular lacerations to their face and their hands, and alcohol and substance use made up 15% of all presentations.HuttonA, RanseJ, VerdonkN, UllahS, ArbonP. Understanding the characteristics of patient presentations of young people at outdoor music festivals. Prehosp Disaster Med. 2014;29(2):1-7.
Diffuse Interstellar Band Profiles
Authors: Sarre P. J. 
Published: February 2014

AbstractA short review of the profiles of diffuse interstellar bands and their possible interpretation is given, largely from the perspective of absorption by gas-phase molecules. Potentially a crucial source of information on the nature of the diffuse band carriers, profile studies provide a promising avenue of research towards finding the solution to their identification. Detection and modelling of fine structure in particular offers a valuable benchmark against which any proposed carriers(s) can be tested.
Extragalactic Diffuse Interstellar Bands: A Universal Problem
Authors: Cordiner M. A. 
Published: February 2014

AbstractThe first extragalactic diffuse interstellar band (DIB) detections were of λ4430 in the Large and Small Magellanic Clouds (LMC and SMC) in the 1960s and 70s. Driven mainly by the increased sensitivity afforded by 8-10 m-class telescopes, the last 13 years have witnessed an explosion of DIB discoveries throughout the nearby and distant universe. This review focuses on the history of extragalactic DIB studies, including some of the important results that have come out of this field, and looks to the future for what can be learned about DIBs in external galaxies with the next generation of large telescopes. So far, DIBs have been observed in the Magellanic Clouds, starburst galaxies, DLAs, and nearby (≤30 Mpc distant) spiral galaxies, and are found to be ubiquitous in the diffuse interstellar medium (ISM) of extragalactic environments wherever dust is present. Important results include the finding that DIB carriers are significantly more closely related to dust than to neutral hydrogen, and that the λ6283 DIB tends to be anomalously weak in low-metallicity sightlines.
Diffuse Interstellar Bands as Probes of Small-Scale Interstellar Structure
Authors: Smith K. T. , Cordiner M. A. , Sarre P. J. 
Published: February 2014

AbstractWe present observations which probe the small-scale structure of the interstellar medium using diffuse interstellar bands (DIBs). Towards HD 168075/6 in the Eagle Nebula, significant differences in DIB absorption are found between the two lines of sight, which are separated by 0.25 pc, and λ 5797 exhibits a velocity shift. Similar data are presented for four stars in the μ Sgr system. We also present a search for variations in DIB absorption towards κ Vel, where the atomic lines are known to vary on scales of ~ 10 AU. Observations separated by ~ 9 yr yielded no evidence for changes in DIB absorption strength over this scale, but do reveal an unusual DIB spectrum.
Why is the Red Rectangle Unique?
Authors: Van Winckel H. 
Published: February 2014

AbstractThe Red Rectangle is a spectacular bipolar nebula centred around the eccentric evolved binary HD 44179. The nebula is rich in spectral signatures: it is the brightest source of the Extended Red Emission (ERE), of the Blue Luminescence (BL) as well as one of the brightest sources of mid-IR PAH bands. Moreover, and unique to this source, a plethora of narrow emission lines is detected on top of the diffuse ERE. Some of these molecular features show rotational contours which become narrower at larger angular separation from the central engine. Some converge to wavelengths and profiles of narrow DIBs. All these observations show that the Red Rectangle is a very rich laboratory to study active astrochemical processes within the nebula. We also address, but fail to answer, the question why this source is so unique among the many observed post-AGB binary analogues.
Spectroscopy of Fullerenes, Fulleranes and PAHs in the UV, Visible and Near Infrared Spectral Range
Authors: Cataldo F. , García-Hernández D. A. , Manchado A. , Iglesias-Groth S. 
Published: February 2014

AbstractThe spectra of fullerenes C60 and C70, higher fullerenes C76, C78 and C84 and hydrogenated fullerenes (fulleranes) were studied in laboratory in the UV and in the visible spectral range and could be used for searching and recognizing these molecules in space. Furthermore, the radical cation spectra of all the mentioned fullerene series and also of a series of large and very large polycyclic aromatic hydrocarbons (PAHs) were generated in the laboratory and studied in the near infrared spectral range.
Spectra of Hot Molecules of Astrophysical Importance: an Update on the ExoMol Project
Authors: Tennyson J. , Yurchenko S. N. 
Published: February 2014

AbstractThe ExoMol project aims at providing comprehensive line lists of molecular transitions which are likely to be important in the atmospheres of extra-solar planets and cool stars, including brown dwarfs. The physics of the molecules involved varies and can be categories according to the number atoms in the species. Thus the molecules can be grouped as diatomics, both closed and open and shell, triatomics, tetratomics, methane and larger species. Progress in providing complete sets of line list for the molecules in each of these categorizes is considered. The latest line lists and related data for each of the species can be found on the project website www.exomol.com.
Formation, Evolution and Destruction of Possible DIB Carriers: Dirty Molecular Hydrogen Ice Clusters
Authors: Lynch D. K. , Bernstein L. S. , Clark F. O. 
Published: February 2014

AbstractWe suggest that the diffuse interstellar bands (DIBs) are absorption lines arising from electronic transitions in molecular clusters primarily composed of a single molecule, atom, or ion (“seed”), embedded in a single-layer shell of H2 molecules (Bernstein et al. 2013). We refer to these clusters as CHCs (Contaminated H2 Clusters). CHCs arise from cm-sized, dirty H2 ice balls, called CHIMPs (Contaminated H2 Ice Macro-Particles), formed in cold, dense, Giant Molecular Clouds (GMCs), and later released into the interstellar medium (ISM) upon GMC disruption. Absorption by the CHIMP of a UV photon releases CHCs. CHCs produce DIBs when they absorb optical photons. When this occurs, the absorbed photon energy disrupts the CHC.
Inside the System, Outside the Box: Palau’s Pursuit of Climate Justice and Security at the United Nations
Authors: Beck Stuart , Burleson Elizabeth 
Published: February 2014

AbstractThis commentary, which presents an expanded version of the keynote address at the 2012 Conference on ‘Global Climate Change Without the United States’, outlines Palau’s role in attempting to motivate international action on climate change. It explains two initiatives: the passage of a United Nations (UN) General Assembly resolution highlighting the security implications of climate change, and the attempt to obtain an advisory opinion from the International Court of Justice on the responsibility of states for climate change. The two avenues are located ‘inside the system’ in that they target well-established organs of the UN system. However, they are ‘outside the box’ because they seek to bypass and ultimately jump-start the international negotiation process that has unfolded under the auspices of the UNFCCC.
Vorinostat in combination with lenalidomide and dexamethasone in patients with relapsed or refractory multiple myeloma
Authors: Siegel D S , Richardson P , Dimopoulos M , Moreau P , Mitsiades C , Weber D , Houp J , Gause C , Vuocolo S , Eid J , Graef T , Anderson K C 
Published: February 2014

AbstractThe addition of vorinostat to lenalidomide/dexamethasone represents a novel combination therapy in multiple myeloma (MM), informed by laboratory studies suggesting synergy. This was a phase I, multicenter, open-label, non-randomized, dose-escalating study in patients with relapsed or relapsed and refractory MM. Clinical evaluation, electrocardiogram, laboratory studies and adverse events were obtained and assessed. The maximum-tolerated dose was not reached owing to a non-occurrence of two dose-limiting toxicities per six patients tested at any of the dosing levels. Patients tolerated the highest dose tested (Level 5) and this was considered the maximum administered dose: at 400 mg vorinostat on days 1–7 and 15–21, 25 mg lenalidomide on days 1–21 and 40 mg dexamethasone on days 1, 8, 15 and 22, per 28-day cycle. Drug-related adverse events were reported in 90% of patients serious adverse experiences were reported in 45% of the patients and 22% of all patients had adverse experiences considered, possibly related to study drug by the investigators. A confirmed partial response or better was reported for 14/30 patients (47%) evaluable for efficacy, including 31% of patients previously treated with lenalidomide. Vorinostat in combination with lenalidomide and dexamethasone proved tolerable with appropriate supportive care, with encouraging activity observed.