bluuebunny/crossref_metadata_2025 huggingface dataset:
11 Oxidation of Amines and N-Hetarenes
Authors: Jiao N. , Li Z.
Published: December 2017

The oxidation of amines and hetarenes are significant transformations that have been widely applied in synthetic organic chemistry. In this chapter, the oxidation of primary, secondary, and tertiary amines, affording imines, nitriles, amides, carbonyls, oximes, nitro compounds, diazenes and their oxides, nitrones, hydrazines, and N-oxides, as well as the oxidation of hetarenes including pyridines, azoles, pyrroles, indoles, guanines, and adenines, are comprehensively discussed. In addition to traditional organometallic catalysis to fulfill these oxidation reactions, some advanced approaches such as photocatalysis, biochemical catalysis, and biomimetic catalysis are also described.
1.11 Reduction of Sulfur Compounds Using Metal Catalysts
Authors: Kaneda K. , Mitsudome T.
Published: December 2017

Homogeneous and heterogeneous metal catalysts based on molybdenum, rhenium, ruthenium, and platinum promote the reduction of sulfur compounds such as sulfoxides, sulfones, and disulfides by using alcohols or molecular hydrogen as reductants.
The Oxford space environment goniometer: A new experimental setup for making directional emissivity measurements under a simulated space environment
Authors: Warren T. J. , Bowles N. E. , Donaldson Hanna K. , Thomas I. R.
Published: December 2017

Measurements of the light scattering behaviour of the regoliths of airless bodies via remote sensing techniques in the Solar System, across wavelengths from the visible to the far infrared, are essential in understanding their surface properties. A key parameter is knowledge of the angular behaviour of scattered light, usually represented mathematically by a phase function. The phase function is believed to be dependent on many factors including the following: surface composition, surface roughness across all length scales, and the wavelength of radiation. Although there have been many phase function measurements of regolith analog materials across visible wavelengths, there have been no equivalent measurements made in the thermal infrared (TIR). This may have been due to a lack of TIR instruments as part of planetary remote sensing payloads. However, since the launch of Diviner to the Moon in 2009, OSIRIS-Rex to the asteroid Bennu in 2016, and the planned launch of BepiColombo to Mercury in 2018, there is now a large quantity of TIR remote sensing data that need to be interpreted. It is therefore important to extend laboratory phase function measurements to the TIR. This paper describes the design, build, calibration, and initial measurements from a new laboratory instrument that is able to make phase function measurements of analog planetary regoliths across wavelengths from the visible to the TIR.
In-situ observation of stacking fault evolution in vacuum-deposited C60
Authors: Hardigree J. F. M. , Ramirez I. R. , Mazzotta G. , Nicklin C. , Riede M.
Published: December 2017

We report an in-situ study of stacking fault evolution in C60 thin films using grazing-incidence x-ray scattering. A Williamson-Hall analysis of the main scattering features during growth of a 15 nm film on glass indicates lattice strain as high as 6% in the first 5 nm of the film, with a decrease to 2% beyond 8 nm thickness. Deformation stacking faults along the {220} plane are found to occur with 68% probability and closely linked to the formation of a nanocrystalline powder-like film. Our findings, which capture monolayer-resolution growth, are consistent with previous work on crystalline and powder C60 films, and provide a crystallographic context for the real-time study of organic semiconductor thin films.
Development and application of piezoelectric driving diamond anvil cell device
Authors: Dou Xiuming , Ding Kun , Sun Baoquan
Published: December 2017

Diamond anvil cell (DAC) technique is widely employed for the high pressure measurements in the field of physics, chemistry, and material research. The new designs of DAC and new techniques for applying pressure have been gradually developed. This paper introduces a piezoelectric driving DAC device to achieve tunable high pressure at low temperature down to 20 K by in situ continuous pressure tuning. The tuning range is about 2-4 GPa depending on the applied electric voltage to piezoelectric lead zirconic titanate ceramic stack. The DAC device is well compatible with the cold chamber of a low temperature cryostat due to its small size and the convenient operation.
Flapping foil power generator performance enhanced with a spring-connected tail
Authors: Liu Zhengliang , Tian Fang-Bao , Young John , Lai Joseph C. S.
Published: December 2017

The flexibility effects on the performance of a flapping foil power generator are numerically studied by using the immersed boundary-lattice Boltzmann method at a Reynolds number of 1100. The flapping foil system consists of a rigid NACA0015 foil undergoing harmonic pitch and plunge motions and a passively actuated flat plate pinned to the trailing edge of the rigid foil. The flexibility is modeled by a torsional spring model at the conjuncture of the rigid foil and the tail. Here, a parametric study on mass density and natural frequency is conducted under the optimum kinematic condition of the rigid system identified from the literature and numerical simulations made for reduced frequency f* = 0.04–0.24 and pitch amplitude θ0 = 40°–90°. Four typical cases are discussed in detail by considering time histories of hydrodynamic loads and tail deformations under the optimal and non-optimal kinematic conditions. Results show that under the rigid-system optimal kinematic condition, a tail with appropriate mass density (μ = 0.60) and resonant frequency ( fr*=1.18) can improve the maximum efficiency by 7.24% accompanied by an increase of 6.63% in power compared to those of a rigid foil with a rigid tail. This is because the deflection of the tail reduces the low pressure region on the pressure surface (i.e., the lower surface during the upstroke or the upper surface during the downstroke) caused by the leading edge vortex after the stroke reversal, resulting in a higher efficiency. At high flapping frequencies, a spring-connected tail ( fr*=0.13) eliminates the large spike in the moment observed in high stiffness cases, reducing the power required for the pitch motion, resulting in 117% improvement in efficiency over that with a rigid tail at a reduced frequency of 0.24.
Topological trajectories of a magnetic skyrmion with an in-plane microwave magnetic field
Authors: Jin Chendong , Song Chengkun , Wang Jinshuai , Xia Haiyan , Wang Jianbo , Liu Qingfang
Published: December 2017

Magnetic skyrmions are stable and topologically protected spin textures which have been observed in several chiral magnetic materials, and the resonant excitations of magnetic skyrmions have become a hot research topic for potential applications in future microwave devices. In this work, we investigate in-plane microwave-induced topological dynamics of a magnetic skyrmion in a nanodisk by using micromagnetic simulations. It is found that the resonant excitations of the skyrmion are elliptical dynamics which contain counterclockwise and clockwise modes by applying different frequencies of the microwave field. The conversion between these two elliptical modes is achieved by a transition to linear vibration. In addition, we demonstrate that the off-centered process of the skyrmion can be controlled by applying different phases of the microwave field. Finally, we discuss the different topological excitations of four types of skyrmions. Our results present the understanding of topological skyrmion dynamics and may also provide a method to control skyrmions in nanodevices.
Photoluminescence enhancement of silicon quantum dot monolayer by plasmonic substrate fabricated by nano-imprint lithography
Authors: Yanagawa Hiroto , Inoue Asuka , Sugimoto Hiroshi , Shioi Masahiko , Fujii Minoru
Published: December 2017

Near-field coupling between a silicon quantum dot (Si-QD) monolayer and a plasmonic substrate fabricated by nano-imprint lithography and having broad multiple resonances in the near-infrared (NIR) window of biological substances was studied by precisely controlling the QDs-substrate distance. A strong enhancement of the NIR photoluminescence (PL) of Si-QDs was observed. Detailed analyses of the PL and PL excitation spectra, the PL decay dynamics, and the reflectance spectra revealed that both the excitation cross-sections and the emission rates are enhanced by the surface plasmon resonances, thanks to the broad multiple resonances of the plasmonic substrate, and that the relative contribution of the two enhancement processes depends strongly on the excitation wavelength. Under excitation by short wavelength photons (405 nm), where enhancement of the excitation cross-section is not expected, the maximum enhancement was obtained when the QDs-substrate distance was around 30 nm. On the other hand, under long wavelength excitation (641 nm), where strong excitation cross-section enhancement is expected, the largest enhancement was obtained when the distance was minimum (around 1 nm). The achievement of efficient excitation of NIR luminescence of Si-QDs by long wavelength photons paves the way for the development of Si-QD-based fluorescence bio-sensing devices with a high bound-to-free ratio.
Transport coefficients of helium-neon mixtures at low density computed from ab initio potentials
Authors: Sharipov Felix , Benites Victor J.
Published: December 2017

The viscosity, thermal conductivity, diffusion coefficient, and thermal diffusion factor of helium-neon mixtures at low density are calculated for a wide range of temperature and for various molar fractions. The Chapman-Enskog method is employed considering the 10th order of the Sonine polynomial expansion. Ab initio potentials for intermolecular interactions are used to calculate the omega-integrals. The relative numerical error of the present results obtained for the potentials used here is less than 7 × 10−5 for the thermal diffusion factor and 2 × 10−5 for all the other coefficients. Since each employed potential has a different accuracy, the uncertainty related to such accuracies was analyzed, considering the contribution of each potential uncertainty. It was found that the total uncertainty due to the potentials is larger than the numerical error and it varies depending on the temperature and molar fraction. A comparison of the calculated transport coefficients with those available in the open literature shows that the present calculations provide the most accurate values currently available for the transport coefficients of helium-neon binary mixtures at low density.
Photoelectron angular distributions from rotationally resolved autoionizing states of N2
Authors: Chartrand A. M. , McCormack E. F. , Jacovella U. , Holland D. M. P. , Gans B. , Tang Xiaofeng , Garcia G. A. , Nahon L. , Pratt S. T.
Published: December 2017

The single-photon, photoelectron-photoion coincidence spectrum of N2 has been recorded at high (∼1.5 cm−1) resolution in the region between the N2+ X Σg2+, v+ = 0 and 1 ionization thresholds by using a double-imaging spectrometer and intense vacuum-ultraviolet light from the Synchrotron SOLEIL. This approach provides the relative photoionization cross section, the photoelectron energy distribution, and the photoelectron angular distribution as a function of photon energy. The region of interest contains autoionizing valence states, vibrationally autoionizing Rydberg states converging to vibrationally excited levels of the N2+ X Σg2+ ground state, and electronically autoionizing states converging to the N2+A2Π and B 2Σu+ states. The wavelength resolution is sufficient to resolve rotational structure in the autoionizing states, but the electron energy resolution is insufficient to resolve rotational structure in the photoion spectrum. A simplified approach based on multichannel quantum defect theory is used to predict the photoelectron angular distribution parameters, β, and the results are in reasonably good agreement with experiment.
Ordering nanoparticles with polymer brushes
Authors: Cheng Shengfeng , Stevens Mark J. , Grest Gary S.
Published: December 2017

Ordering nanoparticles into a desired super-structure is often crucial for their technological applications. We use molecular dynamics simulations to study the assembly of nanoparticles in a polymer brush randomly grafted to a planar surface as the solvent evaporates. Initially, the nanoparticles are dispersed in a solvent that wets the polymer brush. After the solvent evaporates, the nanoparticles are either inside the brush or adsorbed at the surface of the brush, depending on the strength of the nanoparticle-polymer interaction. For strong nanoparticle-polymer interactions, a 2-dimensional ordered array is only formed when the brush density is finely tuned to accommodate a single layer of nanoparticles. When the brush density is higher or lower than this optimal value, the distribution of nanoparticles shows large fluctuations in space and the packing order diminishes. For weak nanoparticle-polymer interactions, the nanoparticles order into a hexagonal array on top of the polymer brush as long as the grafting density is high enough to yield a dense brush. An interesting healing effect is observed for a low-grafting-density polymer brush that can become more uniform in the presence of weakly adsorbed nanoparticles.
Properties of local modes in a complex plasma chain with foreign particles
Authors: Zhang Yang , Wang Xiaogang , Li Bowen
Published: December 2017

Introducing foreign particles into a complex plasma chain results in various discrete oscillation modes other than the continuum lattice mode. In this work, the discrete local modes in a complex plasma chain with different number of foreign particles are studied theoretically. The relation of the foreign particles and the number of modes is given, and the properties of discrete local modes are discussed. The quantum characteristics of such a macroscopic classical system and the degeneracy of an “energy” (frequency) level in the chain are found.
A small porous-plug burner for studies of combustion chemistry and soot formation
Authors: Campbell M. F. , Schrader P. E. , Catalano A. L. , Johansson K. O. , Bohlin G. A. , Richards-Henderson N. K. , Kliewer C. J. , Michelsen H. A.
Published: December 2017

We have developed and built a small porous-plug burner based on the original McKenna burner design. The new burner generates a laminar premixed flat flame for use in studies of combustion chemistry and soot formation. The size is particularly relevant for space-constrained, synchrotron-based X-ray diagnostics. In this paper, we present details of the design, construction, operation, and supporting infrastructure for this burner, including engineering attributes that enable its small size. We also present data for charactering the flames produced by this burner. These data include temperature profiles for three premixed sooting ethylene/air flames (equivalence ratios of 1.5, 1.8, and 2.1); temperatures were recorded using direct one-dimensional coherent Raman imaging. We include calculated temperature profiles, and, for one of these ethylene/air flames, we show the carbon and hydrogen content of heavy hydrocarbon species measured using an aerosol mass spectrometer coupled with vacuum ultraviolet photoionization (VUV-AMS) and soot-volume-fraction measurements obtained using laser-induced incandescence. In addition, we provide calculated mole-fraction profiles of selected gas-phase species and characteristic profiles for seven mass peaks from AMS measurements. Using these experimental and calculated results, we discuss the differences between standard McKenna burners and the new miniature porous-plug burner introduced here.
An experimental approach to study the physiology of natural social interactions
Authors: Chaminade Thierry
Published: December 2017

The classical experimental methodology is ill-suited for the investigation of the behavioral and physiological correlates of natural social interactions. A new experimental approach combining a natural conversation between two persons with control conditions is proposed in this paper. Behavior, including gaze direction and speech, and physiology, including electrodermal activity, are recorded during a discussion between two participants through videoconferencing. Control for the social aspect of the interaction is provided by the use of an artificial agent and of videoed conditions. A cover story provides spurious explanations for the purpose of the experiment and for the recordings, as well as a controlled and engaging topic of discussion. Preprocessing entails transforming raw measurements into boxcar and delta functions time series indicating when a certain behaviour or physiological event is present. The preliminary analysis presented here consists in finding statistically significant differences between experimental conditions in the temporal associations between behavioral and physiological time series. Significant results validate the experimental approach and further developments including more elaborate analysis and adaptation of the paradigm to functional MRI are discussed.
Nombres deverbales con sufijos aumentativos
Authors: Martín García Josefa
Published: December 2017

This paper focuses on deverbal nominalizations with the suffix –ón in modern Spanish, bearing in mind their morphological, syntactic and semantic properties. The suffix –ón gives rise to three types of nominalizations, according to the event structure of the verbal base: resultant object nominalization (rozón), resultant state nominalization (apagón) and punctual action (empujón). These nominalizations do not inherit the event structure of the verb, so they have few verbal properties. All nominalizations with –ón are countable (even nominalizations built on atelic verb, such as acelerón), and all of them exhibit the same meaning related to the sudden and brusque development of the action. In this sense, the suffix –ón fixes the syntactic and semantic content of the nominalization, so that this suffix is semantically specified and it is opposed to other nominalising suffixes because it denotes punctual actions or results reached once the action is developed suddenly and with brusqueness.
Le impronte del traduttore
Authors: Schwartz Cecilia
Published: December 2017

Sommario

Drawing on Antoine Berman’s theory of translation as a critical act, this article analyzes the Swedish translation of Giovanni Verga's
masterpiece I Malavoglia. The actual translation analysis therefore takes as its starting point a pre-analysis that
highlights the translator’s individual motives to deviate from the source text. The results show that the Swedish translator has done
extensive changes to Verga’s polyphonic novel, giving it a more homogeneous form. Drawing on theoretical ideas on the translator’s
unconscious and habitus, the article shows that the translator has downplayed the novel’s expressive and vernacular traits
as well as the patriarchal perspectives, emphasizing instead the novel’s religious paths.
Phosphorylation of the synaptonemal complex protein SYP-1 promotes meiotic chromosome segregation
Authors: Sato-Carlton Aya , Nakamura-Tabuchi Chihiro , Chartrand Stephane Kazuki , Uchino Tomoki , Carlton Peter Mark
Published: December 2017

Chromosomes that have undergone crossing over in meiotic prophase must maintain sister chromatid cohesion somewhere along their length between the first and second meiotic divisions. Although many eukaryotes use the centromere as a site to maintain cohesion, the holocentric organism Caenorhabditis elegans instead creates two chromosome domains of unequal length termed the short arm and long arm, which become the first and second site of cohesion loss at meiosis I and II. The mechanisms that confer distinct functions to the short and long arm domains remain poorly understood. Here, we show that phosphorylation of the synaptonemal complex protein SYP-1 is required to create these domains. Once crossover sites are designated, phosphorylated SYP-1 and PLK-2 become cooperatively confined to short arms and guide phosphorylated histone H3 and the chromosomal passenger complex to the site of meiosis I cohesion loss. Our results show that PLK-2 and phosphorylated SYP-1 ensure creation of the short arm subdomain, promoting disjunction of chromosomes in meiosis I.
Policy Shocks and Market‐Based Regulations: Evidence from the Renewable Fuel Standard
Authors: Lade Gabriel E. , Lin Lawell C.‐Y. Cynthia , Smith Aaron
Published: December 2017

The Renewable Fuel Standard mandates large increases in U.S. biofuel consumption and is implemented using tradable compliance credits known as RINs. In early 2013, RIN prices soared, causing the regulator to propose reducing future mandates. We estimate empirically the effect of three “policy shocks” that reduced the expected mandates in 2013. We find that the largest of these shocks decreased the value of the fuel industry's 2013 compliance obligation by $7 billion. We then study the effects of the shocks on commodity markets and the market value of publicly‐traded biofuel firms. Results show that the burden of the mandate reductions fell primarily on advanced biofuel firms and commodity markets of the marginal compliance biofuel. We argue that the policy shocks reduced the incentive to invest in the technologies required to meet the future objectives of the RFS, and discuss alternative policy designs to address the problems that arose in 2013.
IndeCut evaluates performance of network motif discovery algorithms
Authors: Ansariola Mitra , Megraw Molly , Koslicki David
Published: December 2017

Motivation

Genomic networks represent a complex map of molecular interactions which are descriptive of the biological processes occurring in living cells. Identifying the small over-represented circuitry patterns in these networks helps generate hypotheses about the functional basis of such complex processes. Network motif discovery is a systematic way of achieving this goal. However, a reliable network motif discovery outcome requires generating random background networks which are the result of a uniform and independent graph sampling method. To date, there has been no method to numerically evaluate whether any network motif discovery algorithm performs as intended on realistically sized datasets—thus it was not possible to assess the validity of resulting network motifs.

Results

In this work, we present IndeCut, the first method to date that characterizes network motif finding algorithm performance in terms of uniform sampling on realistically sized networks. We demonstrate that it is critical to use IndeCut prior to running any network motif finder for two reasons. First, IndeCut indicates the number of samples needed for a tool to produce an outcome that is both reproducible and accurate. Second, IndeCut allows users to choose the tool that generates samples in the most independent fashion for their network of interest among many available options.

Availability and implementation

The open source software package is available at https://github.com/megrawlab/IndeCut.

Supplementary information

Supplementary data are available at Bioinformatics online.
Re-assessing the Validity of the Opioid Risk Tool in a Tertiary Academic Pain Management Center Population
Authors: Clark Meredith R , Hurley Robert W , Adams Meredith C B
Published: December 2017

Objective

To analyze the validity of the Opioid Risk Tool (ORT) in a large. diverse population.

Design

A cross-sectional descriptive study.

Setting

Academic tertiary pain management center.

Subjects

A total of 225 consecutive new patients, aged 18 years or older.

Methods

Data collection included demographics, ORT scores, aberrant behaviors, pain intensity scores, opioid type and dose, smoking status, employment, and marital status.

Results

In this population, we were not able to replicate the findings of the initial ORT study. Self-report was no better than chance in predicting those who would have an opioid aberrant behavior. The ORT risk variables did not predict aberrant behaviors in either gender group. There was significant disparity in the scores between self-reported ORT and the ORT supplemented with medical record data (enhanced ORT). Using the enhanced ORT, high-risk patients were 2.5 times more likely to have an aberrant behavior than the low-risk group. The only risk variable associated with aberrant behavior was personal history of prescription drug misuse.

Conclusions

The self-report ORT was not a valid test for the prediction of future aberrant behaviors in this academic pain management population. The original risk categories (low, medium, high) were not supported in the either the self-reported version or the enhanced version; however, the enhanced data were able to differentiate between high- and low-risk patients. Unfortunately, without technological automation, the enhanced ORT suffers from practical limitations. The self-report ORT may not be a valid tool in current pain populations; however, modification into a binary (high/low) score system needs further study.
Development and Application of a Multiplex qPCR Method for the Simultaneous Detection and Quantification of Pratylenchus alleni and P. penetrans in Quebec, Canada
Authors: Dauphinais Nathalie , Vandal Myriam , Gagnon Annie-Ève , Bélair Guy , Véronneau Pierre-Yves , Mimee Benjamin
Published: December 2017

Root lesion nematodes are very common plant-parasitic nematodes that affect a wide range of plants. More than one species can be found simultaneously in a field, and each has a different impact on crop yield. Unfortunately, identifying them using classical morphometric criteria is very difficult and time consuming. The species Pratylenchus alleni was recently observed for the first time in Canada, associated with severe damage in a soybean field in the province of Quebec. The major species, P. penetrans, is also known to be endemic in Quebec but no data exist on its distribution in field crops. This prompted the development of a multiplex quantitative polymerase chain reaction (PCR) assay for the simultaneous detection and quantification of P. alleni and P. penetrans. The method was found to be specific and sensitive, systematically detecting a single larva in a 100-cm3 soil sample with no cross-amplification with other species, even when they outnumbered the target species. An exogenous internal positive control was included in the test to avoid false negatives due to the presence of PCR inhibitors. This assay was used to study the distribution of P. alleni and P. penetrans in 185 soybean fields in the major soybean-producing areas of Quebec during a 3-year survey. Overall, P. penetrans was found in 42% of the fields, P. alleni in 8%, and both species in 4%. The population density of P. alleni in positive fields was still very low, with only a few larvae detected. However, densities of P. penetrans were much higher: the provincial mean was 51.7 nematodes per 100 cm3 of soil (in positive samples), and 8% of the fields (15 of 185) exceeded the theoretical economic threshold. The presence of P. penetrans was also strongly correlated with soil texture, with lighter soil being the most favorable.
Clinical Outcomes Using Oversized Back Plates in Type I Boston Keratoprosthesis
Authors: Kaufman Aaron R. , Cruzat Andrea , Colby Kathryn A.
Published: December 2017

Objectives:

To examine clinical outcomes of oversized titanium back plates in type I Boston keratoprosthesis (KPro) implantation.

Methods:

Retrospective study of 22 sequential eyes (20 patients) undergoing type I KPro implantation with an oversized titanium back plate (larger than trephined wound diameter by 1.0 mm or more), performed by a single surgeon (K.A.C.) from June 2010 to November 2014. Data were collected regarding preoperative eye characteristics, surgical details, and postoperative clinical outcomes.

Results:

Mean follow-up time per eye was 24.1±14.9 months. All eyes had improved vision after surgery; 13 eyes (59.1%) maintained visual acuity improvement at last follow-up. Initial KPro's were retained in 19 eyes (86.4%); one eye required KPro replacement. Primary retroprosthetic membrane (RPM) developed in three eyes (13.6%), with similar occurrence in aniridic (14.3%) and nonaniridic eyes (13.3%). Secondary RPM's developed in two eyes (9.1%) after vitritis (one eye) and retinal and choroidal detachment (one eye). Glaucoma was a common comorbidity: 2 of 14 eyes (14.3%) with preoperative glaucoma had glaucoma progression, and 4 of 8 eyes (50.0%) without preoperative glaucoma developed glaucoma postoperatively. Other postoperative complications included retinal detachment (5 eyes, 22.7%) and idiopathic vitritis (3 eyes, 13.6%).

Conclusions:

Oversized titanium KPro back plates are associated with a low rate of primary RPM formation and may have particular utility in reducing primary RPM formation in aniridic eyes. Glaucoma remains a challenge in postoperative KPro management. Complex eyes, at increased risk of postoperative complications, require careful management.
Differences in the Alignment Pattern of the Maxillary Dental Arch Following Fixed Orthodontic Treatment in Patients With Bilateral Cleft Lip and Palate: Anteroposterior-Collapsed Arch Versus Transverse-Collapsed Arch
Authors: Hong Mihee , Baek Seung-Hak
Published: December 2017

The purpose of this study was to investigate differences in the alignment pattern of the collapsed maxillary arch following fixed orthodontic treatment (FOT) in bilateral cleft lip and palate (BCLP) patients according to collapse type. Fifteen BCLP patients were divided into Group 1 (anteroposterior-collapsed arch, n = 7) and Group 2 (transverse-collapsed arch, n = 8) according to maxillary arch shape before FOT. Linear and angular variables of lateral cephalograms and dental models were evaluated before (T1) and after FOT (T2), and statistical analysis was performed. In cephalometric measurements at T1, both the groups exhibited retrusive maxillae, a Class III relationship, and lingual inclination of U1-SN. At T2, significant improvement of U1-SN was observed in both the groups (P < 0.01 in Group 1; P < 0.05 in Group 2). In the model measurements at T1, the inter-second premolar width (IP2W), inter-first molar width (IM1W), and left segmental angle were smaller in Group 2 than in Group 1 (IP2W, P < 0.001; IM1W, P < 0.05; LSA, P < 0.05). From T1 to T2, the arch width increased significantly in Group 2 (inter-canine width, IP1W, IP2W, and IM1W; all P < 0.05), but not in Group 1. Therefore, there were significant differences in ΔIP2W (2.4 mm versus 14.9 mm, P < 0.01) and ΔIM1W (−0.7 mm versus 5.9 mm, P < 0.001) between Groups 1 and 2. In both the groups, the molar depth and right and left segmental angles increased significantly, while the premaxillary rotation angle decreased significantly (molar depth, RSA, LSA, and PMRA; all P < 0.05). The alignment strategy for the maxillary premolar and molar areas should be modified according to arch shape in BCLP patients.
Population genomics of hypervirulentKlebsiella pneumoniaeclonal group 23 reveals early emergence and rapid global dissemination
Authors: Lam Margaret MC , Wyres Kelly L , Duchêne Sebastian , Wick Ryan R , Judd Louise M , Gan Yunn-Hwen , Hoh Chu-Han , Achuleta Sophia , Molton James S , Kalimuddin Shirin , Koh Tse Hsien , Passet Virginie , Brisse Sylvain , Holt Kathryn E
Published: December 2017

Since the mid-1980s there have been increasing reports of severe community-acquired pyogenic liver abscess, meningitis and bloodstream infections caused by hypervirulentKlebsiella pneumoniae, predominantly encompassing clonal group (CG) 23 serotype K1 strains. Common features of CG23 include a virulence plasmid associated with iron scavenging and hypermucoidy, and a chromosomal integrative and conjugative element (ICE) encoding the siderophore yersiniabactin and the genotoxin colibactin. Here we investigate the evolutionary history and genomic diversity of CG23 based on comparative analysis of 98 genomes. Contrary to previous reports with more limited samples, we show that CG23 comprises several deep branching sublineages dating back to the 1870s, many of which are associated with distinct chromosomal insertions of ICEs encoding yersiniabactin. We find that most liver abscess isolates (>80%) belong to a dominant sublineage, CG23-I, which emerged in the 1920s following acquisition of ICEKp10(encoding colibactin in addition to yersiniabactin) and has undergone clonal expansion and global dissemination within the human population. The unique genomic feature of CG23-I is the production of colibactin, which has been reported previously as a promoter of gut colonisation and dissemination to the liver and brain in a mouse model of CG23K. pneumoniaeinfection, and has been linked to colorectal cancer. We also identify an antibiotic-resistant subclade of CG23-I associated with sexually-transmitted infections in horses dating back to the 1980s. These data show that hypervirulent CG23K. pneumoniaewas circulating in humans for decades before the liver abscess epidemic was first recognised, and has the capacity to acquire and maintain AMR plasmids. These data provide a framework for future epidemiological and experimental studies of hypervirulentK. pneumoniae. To further support such studies we present an open access and completely sequenced human liver abscess isolate, SGH10, which is typical of the globally disseminated CG23-I sublineage.
Non-Invasive Brain Stimulation to Investigate Language Production in Healthy Speakers: A Meta-Analysis
Authors: Klaus Jana , Schutter Dennis J.L.G.
Published: December 2017

Non-invasive brain stimulation (NIBS) has become a common method to study the interrelations between the brain and language functioning. This meta-analysis examined the efficacy of transcranial magnetic stimulation (TMS) and direct current stimulation (tDCS) in the study of language production in healthy volunteers. Forty-five effect sizes from 30 studies which investigated the effects of NIBS on picture naming or verbal fluency in healthy participants were meta-analysed. Further sub-analyses investigated potential influences of stimulation type, control, target site, task, online vs. offline application, and current density of the target electrode. Random effects modelling showed a small, but reliable effect of NIBS on language production. Subsequent analyses indicated larger weighted mean effect sizes for TMS as compared to tDCS studies. No statistical differences for the other sub-analyses were observed. We conclude that NIBS is a useful method for neuroscientific studies on language production in healthy volunteers.
Simplifying humanitarian assistance/disaster relief analytic models using activity-based intelligence
Authors: Widener Donald V. , Mazzuchi Thomas A. , Sarkani Shahram
Published: December 2017

Purpose

The purpose of this paper is to propose an effective knowledge elicitation method and representation scheme that empowers humanitarian assistance/disaster relief (HA/DR) analysts and experts to create analytic models without the aid of data scientists and methodologists while addressing the issues of complexity, collaboration, and emerging technology across a diverse global network of HA/DR organizations.

Design/methodology/approach

The paper used a mixed-methods research approach, with qualitative research and analysis to select the model elicitation method, followed by quantitative data collection and evaluation to test the representation scheme. A simplified analytic modeling approach was created based on emerging activity-based intelligence (ABI) analytic methods.

Findings

Using open source data on the Syrian humanitarian crisis as the reference mission, ABI analytic models were proven capable in modeling HA/DR scenarios of physical systems, nonphysical systems, and thinking.

Practical implications

As a data-agnostic approach to develop object and network knowledge, ABI aligns with the objectives of modeling within multiple HA/DR organizations.

Originality/value

Using an analytic method as the basis for model creation allows for immediate adoption by analysts and removes the need for data scientists and methodologists in the elicitation phase. Applying this highly effective cross-domain ABI data fusion technique should also supplant the accuracy weaknesses created by traditional simplified analytic models.
The value of formal titles to land in residential property transactions
Authors: Alananga Sanga Samwel
Published: December 2017

Purpose

The purpose of this paper is to analyse the impact of title risks on property prices to establish the associated title risk-price premiums across property types and the moderating effect of occupation strategies for informal transactions.

Design/methodology/approach

Based on household survey data on transactions for 1,514 residential properties in Kinondoni Municipality, Tanzania, binomial logistic regression models were implemented to predict pre-purchase transaction risks. The results of which were used as inputs in mixed effect models to examine the effect of the predicted title risks on (2,010 constant) purchase price for three-bedrooms finished and unfinished housing units and 400 m2 plots.

Findings

Although legal titles have positive overall title risk-price premiums, such premiums hardly accrue from transactions involving finished houses and marginally accrue from vacant plots transactions. On average, unfinished housing purchasers are title risk-averse, “vacant plots” purchasers are title risk-neutral, while “finished housing” purchasers are title risk-lovers.

Research limitations/implications

The sample composition does not include developer-built housing units, the inclusion of which may sway results away from the observations of this study.

Practical implications

Titling alone can hardly be used as a property market stimuli (eliminate transaction risks) unless the market is dominated by unfinished houses.

Originality/value

Existing studies consider neither traded housing products nor pre-purchase transaction risks or consider only one of the two, thus leaving a gap in the literature for which this study sought to bridge. Researchers must incorporate both to arrive at a well-informed conclusion on the potential risks as well as prices achievable in each transaction.
Salesperson performance: role of perceived overqualification and organization type
Authors: Purohit Basant
Published: December 2017

Purpose

The purpose of this paper is to examine the impact of perceived overqualification (POQ) on salesperson performance.

Design/methodology/approach

In total, 120 usable samples were collected from surveying sales representatives and their sales supervisors from 48 different Indian pharmaceutical firms.

Findings

The results indicated that sales personnel with POQ perform well: in prospector and analyzer type organizations as compared to in defender and reactor type organizations, and when controlled by the outcome-based control system than when controlled by the behavior-based control system.

Practical implications

This study suggests that “person-job” fit criteria used in personnel selection should also consider environmental variables (organization type and control mechanisms) for better job outcomes. The results of the study would enable an organization to assess whether its reward systems and levels are getting the desired impact from sales personnel with different levels of POQ in terms of salesperson performance.

Originality/value

Using “person-job” fit theory, this study examined the role of organization type and sales force control system as moderators of “POQ – Salesperson Performance” relationships and explains how organizations can benefit from enhancing sales performance of salespersons with POQ.
Contactless Yagi-patch EMG electrodes design and development for prosthetics
Authors: Stopforth Riaan , Mangezi Andrew
Published: December 2017

Purpose

A contactless electromyography (EMG) electrodes design and development for prosthetics, particularly the Touch Hand 3, was the main objective of this paper. The correlation between EMG electrodes and patch antenna are described, with the problem relating to the dimensions of the covidien electrodes. The purpose of this paper is to improve the signal strength of the EMG electrodes and having them to not be in contact with the skin to cause irritation in the person.

Design/methodology/approach

A combination of the contact covidien electrodes and aluminium foil was used to develop electrodes that were in a similar configuration than a Yagi antenna. Different layers of patch elements were designed, developed and implemented.

Findings

Different layers of Yagi-patch electrodes are tested with different volunteers and compared with the average signal strengths obtained from the covidien electrodes. An improvement in signal strength with the Yagi-patch electrodes has been found.

Practical implications

The purpose of the work was to design, develop and test EMG electrodes that are cost-effective, reusable and able to improve the signal strengths that are recorded, for better functionality of prosthetic devices.

Originality/value

The integration of EMG and antennae theory to implement a Yagi-patch EMG electrode to improve on signal reception. The electrodes have the properties of being cheap, easy available, can eliminate direct contact and avoiding patches on the skin. Comparison of different layered electrodes with the contactless electrodes close to the skin. Comparison of the different electrodes on a silicone sleeve, which are commonly worn by amputees, placed between the skin and the prosthetic’s socket. Testing the Yagi-patch electrodes with an application with the prosthetic Touch Hand, to allow for the control of a system such as the Touch Hand.
Contrasting impacts of land‐use change on phylogenetic and functional diversity of tropical forest birds
Authors: Chapman Philip M. , Tobias Joseph A. , Edwards David P. , Davies Richard G.
Published: December 2017

Biodiversity conservation strategies increasingly target maintaining evolutionary history and the resilience of ecosystem function, not just species richness (SR). This has led to the emergence of two metrics commonly proposed as tools for decision making: phylogenetic diversity (PD) and functional diversity (FD). Yet, the extent to which they are interchangeable remains poorly understood.

We explore shifts in and relationships between FD and PD of bird communities across a disturbance gradient in Borneo, from old‐growth tropical forest to oil palm plantation.

We show a marked decline in PD, and an increase in phylogenetic mean nearest taxon distance from forest to oil palm, in line with declining SR across the gradient. However, phylogenetic mean pairwise distance is constrained by forest logging more than by conversion to oil palm, taking account of SR.

The decline in FD across the gradient is less severe than in PD, with all metrics indicating relatively high trait diversity in oil palm despite low SR, although functional redundancy is much reduced. Accounting for SR, levels of functional over‐ or under‐dispersion of bird communities are strongly coupled to habitat disturbance level rather than to any equivalent phylogenetic metric.

Policy implications. We suggest that while phylogenetic diversity (PD) is an improvement on species richness as a proxy for functional diversity (FD), conservation decisions based on phylogenetic diversity alone cannot reliably safeguard maximal functional diversity. Thus, phylogenetic diversity and functional diversity are related but still complementary. Priority setting exercises should use these metrics in combination to identify conservation targets.
Comparison of paired and single clinical placement models: a time‐use analysis
Authors: Bhagwat Marita , Hewetson Ronelle , Jones Lee , Hill Anne , Nunn Jennifer , Tosh Rachel , Cahill Louise
Published: December 2017

Background

To meet rising clinical placement demand caused by increasing health student numbers, the use of paired (two students) rather than single (one student) placement models has been proposed. There is, however, limited research available to inform placement providers about the relative effects of both models on healthcare services, including patient‐ and non‐patient‐related activities and patient occasions of service.

Aims

To investigate a key clinical question: Does clinical educator (supervisor) and student time use differ during paired placements compared with single placements? Also to examine the satisfaction levels of clinical educators (CEs) and students with paired and single clinical placement models.

Methods & Procedures

Queensland Health speech and language therapists (N = 44) and speech and language therapy students (N = 32) involved in paired or single clinical placements were recruited for this study. CEs and students completed time‐use surveys for 3 days after the midpoint of placements; CEs also completed surveys for 3 matched days during a non‐placement period 3 weeks or more following placements for comparative purposes. CEs and students additionally completed a satisfaction survey at the end of placements. Paired and single CE and student groups were compared for differences in their time‐use and satisfaction levels using non‐parametric statistics.

Outcomes & Results

The placement model did not impact on occasions of service provided by CEs (p = 0.931) or students (p = 0.776). It also had no effect on the percentage of time CEs or students engaged in patient‐related activities (p = 0.577; 0.291) and non‐patient‐related activities (p = 0.559; 0.177). On clinical placement days, CEs spent a median 10 minutes longer at work regardless of whether or not it was a paired or single placement, compared with non‐placement days (p = 0.107). CEs and students who had been involved in a paired placement reported the same high levels of placement satisfaction (various measures) as those who had been involved in a single placement.

Conclusions & Implications

The paired‐placement model has the potential to increase student placement offers without negatively impacting on clinical service provision including occasions of service, patient or non‐patient‐related activities, or overall CE time spent at work.
Urban Warfare Ecology: A Study of Water Supply in Basrah
Authors: Zeitoun Mark , Elaydi Heather , Dross Jean‐Philippe , Talhami Michael , de Pinho‐Oliveira Evaristo , Cordoba Javier
Published: December 2017

This article assesses the impact of armed conflict on the drinking water service of Basrah from 1978 to 2013 through an ‘urban warfare ecology’ lens in order to draw out the implications for relief programming and relevance to urban studies. It interprets an extensive range of unpublished literature through a frame that incorporates the accumulation of direct and indirect impacts upon the hardware, consumables and people upon which urban services rely. The analysis attributes a step‐wise decline in service quality to the lack of water treatment chemicals, lack of spare parts, and, primarily, an extended ‘brain‐drain’ of qualified water service staff. The service is found to have been vulnerable to dependence upon foreign parts and people, ‘vicious cycles’ of impact, and the politics of aid and of reconstruction. It follows that practitioners and donors eschew ideas of relief–rehabilitation–development (RRD) for an appreciation of the needs particular to complex urban warfare biospheres, where armed conflict and sanctions permeate all aspects of service provision through altered biological and social processes. The urban warfare ecology lens is found to be a useful complement to ‘infrastructural warfare’ research, suggesting the study of protracted armed conflict upon all aspects of urban life be both deepened technically and broadened to other cases.