bluuebunny/crossref_metadata_2025 huggingface dataset:
Improvement of speeded-up robust features for robot visual simultaneous localization and mapping
Authors: Wang Yin-Tien , Lin Guan-Yu
Published: September 2013

A robot mapping procedure using a modified speeded-up robust feature (SURF) is proposed for building persistent maps with visual landmarks in robot simultaneous localization and mapping (SLAM). SURFs are scale-invariant features that automatically recover the scale and orientation of image features in different scenes. However, the SURF method is not originally designed for applications in dynamic environments. The repeatability of the detected SURFs will be reduced owing to the dynamic effect. This study investigated and modified SURF algorithms to improve robustness in representing visual landmarks in robot SLAM systems. Many modifications of the SURF algorithms are proposed in this study including the orientation representation of features, the vector dimension of feature description, and the number of detected features in an image. The concept of sparse representation is also used to describe the environmental map and to reduce the computational complexity when using extended Kalman filter (EKF) for state estimation. Effective procedures of data association and map management for SURFs in SLAM are also designed to improve accuracy in robot state estimation. Experimental works were performed on an actual system with binocular vision sensors to validate the feasibility and effectiveness of the proposed algorithms. The experimental examples include the evaluation of state estimation using EKF SLAM and the implementation of indoor SLAM. In the experiments, the performance of the modified SURF algorithms was compared with the original SURF algorithms. The experimental results confirm that the modified SURF provides better repeatability and better robustness for representing the landmarks in visual SLAM systems.
Coxeter groups and Kähler groups
Authors: PY PIERRE
Published: September 2013

We study homomorphisms from Kähler groups to Coxeter groups. As an application, we prove that a cocompact complex hyperbolic lattice (in complex dimension at least 2) does not embed into a Coxeter group or a right-angled Artin group. This is in contrast with the case ofrealhyperbolic lattices.
Immunization against recombinant GnRH-I alters testicular structure in an experimental boar model
Authors: Li Yunsheng , Liu Ya , Su Shiping , Pu Yong , Zhang Xiaorong , Fang Fugui
Published: September 2013

The aim of this study was to evaluate and to compare testicular tissue in immunized and control boars. Eighteen male piglets, aged 12 weeks, were vaccinated twice intramuscularly with a maltose-binding protein–gonadotropin-releasing hormone I hexamer peptide (MBP-GnRH-I6). Blood samples were taken at 12, 18, 21 and 24 weeks of age. Serum concentrations of testosterone and GnRH-I antibodies were determined by radioimmunoassay. The pigs were sacrificed 6 weeks after the second immunization. Testicular weight and size were recorded and tissue samples were collected for histological examination. The results demonstrated that active immunization against MBP-GnRH-I6 increased serum GnRH-I antibody levels (P < 0.05) and reduced serum concentrations of testosterone (P < 0.05) when compared with controls. Histological studies performed on testicular tissue revealed clear signs of atrophy in the MBP-GnRH-I6 immunized pigs, and a significant reduction (P < 0.05) in paired testes weight and size were seen in the treated boars. Microscopically, the mean diameter of the seminiferous tubules was markedly reduced (P < 0.01). Spermatogonia were visible, as well as few spermatocytes, but no spermatozoa were detected in the seminiferous tubules. Ultramicroscopic analysis of testicular tissue revealed an increase in the thickness of the basement membrane and extensive damage in the cell organelles of the treated animals, including small spermatogonial size, decreased number of mitochondria and endoplasmic reticulum in the primary spermatocyte and spermatid, a shallow hollow for nuclear membranes in Sertoli cells and mitochondrial vacuolation in Leydig cells. We conclude that MBP-GnRH-I6 induces severe atrophy in the testes of immunized boars.
Embryological, clinical and ultrastructural study of human oocytes presenting indented zona pellucida
Authors: Sousa M. , da Silva J. Teixeira , Silva J. , Cunha M. , Viana P. , Oliveira E. , Sá R. , Soares C. , Oliveira C. , Barros A.
Published: September 2013

Human oocyte dysmorphisms attain a large proportion of retrieved oocytes from assisted reproductive technology (ART) treatment cycles. Extracytoplasmic defects involve abnormal morphology of the zona pellucida (ZP), perivitelline space and first polar body. The aim of the present study was to describe a novel dysmorphism affecting the ZP, indented ZP. We also evaluated the clinical, embryological and ultrastructural features of these cases. We evaluated all ART treatment cycles during 7 consecutive years and found 13 treatment cycles (six patients) with all oocytes presenting an indented ZP. In addition, these oocytes presented total or partial absence of the perivitelline space, absence of resistance to ZP and oolemma penetration during microinjection, and low ooplasm viscosity during aspiration. This novel described dysmorphism was recurrent and attained all oocytes in three cases that had more than one treatment cycle. When compared with controls, data showed significant low oocyte maturity (42% versus 81.6%) and high cycle cancellation (30.8% versus 8.5%) rates, normal degeneration (3.4% versus 6.3%) and fertilization rates (69% versus 69.5%), and low pregnancy (15.4% versus 33.3%) and live-birth delivery (7.7% versus 27.7%) rates per cycle. Ultrastructure analysis revealed a zona pellucida structure with large empty electrolucent regions, an outer ZP layer with an indented surface with protuberances and a thick inner ZP that obliterated the perivitelline space. There was evidence of exocytosis of ZP material by the oocyte. In conclusion, oocytes with this novel described dysmorphism (indented ZP) are associated with low maturity, pregnancy and live-birth delivery rates.
Bacteria Mediate Oviposition by the Black Soldier Fly, Hermetia illucens (L.), (Diptera: Stratiomyidae)
Authors: Zheng Longyu , Crippen Tawni L. , Holmes Leslie , Singh Baneshwar , Pimsler Meaghan L. , Benbow M. Eric , Tarone Aaron M. , Dowd Scot , Yu Ziniu , Vanlaerhoven Sherah L. , Wood Thomas K. , Tomberlin Jeffery K.
Published: September 2013

There can be substantial negative consequences for insects colonizing a resource in the presence of competitors. We hypothesized that bacteria, associated with an oviposition resource and the insect eggs deposited on that resource, serve as a mechanism regulating subsequent insect attraction, colonization and potentially succession of insect species. We isolated and identified bacterial species associated with insects associated with vertebrate carrion and used these bacteria to measure their influence on the oviposition preference of adult black soldier flies which utilizes animal carcasses and is an important species in waste management and forensics. We also ascertained that utilizing a mixture of bacteria, rather than a single species, differentially influenced behavioral responses of the flies, as did bacterial concentration and the species of fly from which the bacteria originated. These studies provide insight into interkingdom interactions commonly occurring during decomposition, but not commonly studied.
Analysis of harmonic current summation based on field measurements
Authors: Ćuk Vladimir , Cobben Joseph F.G. , Kling Wil L. , Ribeiro Paulo F.
Published: September 2013

Estimation of total harmonic current generated by a group of sources is a difficult task, because of time variations of loads and background harmonic voltages caused by the rest of the network. Several simulation techniques have been proposed in the past, which try to address the problem and estimate the maximal levels of current and voltage distortion, but with limited field measurements to verify the results. In this study, the subject of the summation of harmonic currents in industrial installations is reviewed and analysed based on field measurements. Harmonic magnitudes and phase angles of individual load currents and the total current were measured simultaneously, on four locations. The duration of each measurement was approximately 1 week, with a time resolution of 1 s. The assumptions made in probabilistic studies are discussed based on the results, and coefficients for simplified estimation are calculated together with their limit values. Lastly, some considerations about the measurement approach are made.
Comprehensive design methodology of tuned passive filters based on a probabilistic approach
Authors: Churio‐Barboza Julio C. , Maza‐Ortega Jose Maria
Published: September 2013

This study presents a new method for the optimal design of single‐tuned harmonic passive filters considering the probabilistic nature of power system magnitudes. For this purpose, the algorithm uses the measurements acquired by a power quality analyser. The Gaussian mixture model has been applied to actual harmonic measurements to obtain a precise statistical representation which is crucial in the proposed design procedure. The optimisation algorithm considers both probabilistic and deterministic variables involving all the harmonic components including the minor or non‐characteristic harmonics. Moreover, the objective function of the optimisation algorithm is formulated taken into account all the harmonic terms overpassing other simplified formulations based only on the fundamental component. This study includes a case study with different optimisation scenarios to clearly highlight the benefits of each of the proposed contributions.
Fuzzy adaptive particle swarm optimisation for power loss minimisation in distribution systems using optimal load response
Authors: Hu Weihao , Chen Zhe , Bak‐Jensen Birgitte , Hu Yanting
Published: September 2013

Consumers may decide to modify the profile of their demand from high price periods to low price periods in order to reduce their electricity costs. This optimal load response to electricity prices for demand side management generates different load profiles and provides an opportunity to achieve power loss minimisation in distribution systems. In this study, a new method to achieve power loss minimisation in distribution systems by using a price signal to guide the demand side management is proposed. A fuzzy adaptive particle swarm optimisation is used as a tool for the power loss minimisation study. Simulation results show that the proposed approach is an effective measure to achieve power loss minimisation in distribution systems.
Efficient sequential non‐linear optimal power flow approach using incremental variables
Authors: Mohapatra Abheejeet , Bijwe Pradeep R. , Panigrahi Bijaya Ketan
Published: September 2013

Linear programming (LP) techniques and interior point methods (IPMs) have been used extensively for optimal power flow's solution. Both have their merits as well as limitations. There are situations in which a technique which combines the merits of both, is desirable. This study attempts to develop this technique using the well‐known compact model, with hitherto unused non‐linear approximation, in terms of incremental variables. Sequential applications of this non‐linear incremental model, which is solved by using any of the IPM variants, leads to solution of the original problem. It avoids the vexed step‐size restrictions, so common in sequential LP techniques. This model also allows for speed‐accuracy trade‐off. Results for few IEEE test systems and a fictitious 1000 bus system, have been obtained to explore the potential of this technique.
Taxonomic description for western Australian distribution medium‐voltage and low‐voltage feeders
Authors: Li Yingliang , Wolfs Peter J.
Published: September 2013

A typical distribution network contains hundreds of medium‐voltage (MV) feeders and ten thousands of low‐voltage (LV) feeders. This work introduces an efficient taxonomy approach that combines cluster analysis with discriminant analysis to identify statistically representative MV and LV feeders in the west Australian context. Quadratic discriminant functions have been extracted and can be used as a feeder classifier for any feeder in this distribution system. The representative feeder sets provide rigorously validated test cases for the evaluation of smart grid technologies.
Probabilistic assessment of available transfer capability considering spatial correlation in wind power integrated system
Authors: Gang Luo , Jinfu Chen , Defu Cai , Dongyuan Shi , Xianzhong Duan
Published: September 2013

With the increasing integration of wind farms, modification of current tools for evaluating and managing power systems such as available transfer capability (ATC) becomes an important issue. This study presents a computationally accurate and efficient method in evaluating ATC with large amount of uncertainty based on Latin hypercube sampling (LHS) and scenario clustering techniques. LHS is used in Monte Carlo simulation to select a system state with high sampling efficiency and good precision. Cholesky decomposition is combined into the sampling process to deal with the dependencies among input random variables. The sampled scenarios are clustered by vector quantification clustering algorithm, which contributes to the fast calculation of ATC evaluation for numerous scenarios. Finally, a sensitivity method based on optimal power flow is proposed for the clustered scenarios. The case studies, with the IEEE reliability test system, illustrate the advantages of the proposed method that largely reduces the computation burden under the premise of ensuring its accuracy. The results also verify the obvious enhancement of spatially correlated wind power on the volatility of ATC.
A method for determination of harmonics responsibilities at the point of common coupling using data correlation analysis
Authors: Shojaie Mehdi , Mokhtari Hosein
Published: September 2013

In this study, a new method is proposed to evaluate the utility harmonic impedance and the harmonics responsibilities at the point of common coupling. The former task is accomplished by involving the harmonic phase angles in the data correlation method, and the latter one is done using an approach based on the fluctuation of the background harmonic voltage. An important advantage of the method is to take the load harmonic impedance into account in appropriate manner. The performance of the proposed method is verified using simulation studies for different cases and also field measurements. Long‐term measurement data are used to determine the harmonic contribution of the industrial customers and short‐term measurement data are utilised to validate the effectiveness of the proposed method. Totally, simulation analysis and case study demonstrate more accuracy of the proposed method in comparison with other present methods.
Efficient design of optical delay lines based on slotted‐ring resonators
Authors: Abujnah Nabeil A. , Letizia Rosa , Hameed Mohamed Farhat O. , Obayya Salah S.A. , Abdelrazzak Maher
Published: September 2013

In this study, a novel design of coupled‐resonator optical waveguide delay line based on slotted ring resonators (SCROW) is proposed and analysed. The coupling efficiency between the resonators, which can be controlled either by changing the slot position inside the cavity or by varying the separation distance between the rings, plays an essential role in controlling both group velocity and delay time of the suggested SCROW. The simulation results are obtained using multi‐resolution time domain scheme in conjunction with uniaxial perfectly matched layer boundary conditions. By introducing a slot inside the microring resonator of the suggested structure, a quality factor of about 5 × 103 and high delay time are obtained with small ring size.
La fonction modèle la forme et la forme conditionne la
fonction. Entretien avec Michel Limme
Authors: Limme Michel , Rozencweig Georges
Published: September 2013

Le Pr Michel Limme est à la tête du département d’Orthodontie et de Pédodontie à
l’université de Liège (Belgique). Il a publié de nombreux articles sur le développement
des arcades dentaires, l’interception des dysfonctions notamment ventilatoires et
masticatoires. Son équipe s’implique depuis 25 ans dans l’approche du syndrome des apnées
obstructives du sommeil pour une meilleure compréhension à la fois sur le plan
diagnostique, étiopathogénique et thérapeutique.
Acquisition et maintien des automatismes en rééducation
maxillo-faciale
Authors: Fournier Maryvonne , Girard Marion
Published: September 2013

La rééducation maxillo-faciale, souvent recommandée pour accompagner le traitement en
orthodontie et prévenir toute récidive, consiste, comme toutes les autres rééducations, à
faire prendre conscience aux patients des différentes postures et praxies erronées. Son
but est d’en montrer les bonnes, de donner les moyens musculaires et articulaires pour les
réaliser et surtout d’automatiser tous ces processus. Cet automatisme est le plus long et
le plus difficile à obtenir. Notre intervention se fait à plusieurs niveaux : la langue
(posture de repos, déglutition, phonation), les peauciers, la ventilation, les
articulations temporaux mandibulaires, les habitudes nocives et la posture. La dernière
séance consiste à vérifier que tous les automatismes sont définitivement acquis.
IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures
Authors: Acree William E.
Published: August 2013

Solubility data are compiled and reviewed for benzoic acid and 63 substituted benzoic acids dissolved in neat organic solvents and well-defined binary and ternary organic solvent mixtures. The compiled solubility data were retrieved from the published chemical and pharmaceutical literature covering the period from 1900 to the beginning of 2013.
Large eddy simulations of turbulent channel and boundary layer flows at high Reynolds number with mean wall shear stress boundary condition
Authors: Lee Jungil , Cho Minjeong , Choi Haecheon
Published: August 2013

In this study, we investigate the applicability of the mean wall shear stress as a boundary condition for large eddy simulation of wall-bounded turbulent flow with coarse-grid resolution near the wall. We consider turbulent channel flow up to Reτ = O(108) and turbulent boundary layer flow up to Reθ = O(107). The mean wall shear stress is determined based on the log-law at every time step. It is shown that the mean wall shear stress boundary condition accurately predicts the logarithmic velocity profile and low-order turbulence statistics even with very coarse-grid spacing near the wall.
Solar magnetic reconnection seen in detail
Authors: Miller Johanna L.
Published: August 2013

New observations provide the most complete picture yet for the most energetic explosions in the solar system.
Preliminary evaluation of a primary care intervention for cry-fuss behaviours in the first 3-4 months of life (‘The Possums Approach’): effects on cry-fuss behaviours and maternal mood
Authors: Douglas Pamela S. , Miller Yvette , Bucetti Anne , Hill Peter S. , Creedy Debra K.
Published: September 2013

Problem crying in the first few months of life is both common and complex, arising out of multiple interacting and co-evolving factors. Parents whose babies cry and fuss a lot receive conflicting advice as they seek help from multiple health providers and emergency departments, and may be admitted into tertiary residential services. Conflicting advice is costly, and arises out of discipline-specific interpretations of evidence. An integrated, interdisciplinary primary care intervention (‘The Possums Approach’) for cry-fuss problems in the first months of life was developed from available peer-reviewed evidence. This study reports on preliminary evaluation of delivery of the intervention. A total of 20 mothers who had crying babies under 16 weeks of age (average age 6.15 weeks) completed questionnaires, including the Crying Patterns Questionnaire and the Edinburgh Postnatal Depression Scale, before and 3−4 weeks after their first consultation with trained primary care practitioners. Preliminary evaluation is promising. The Crying Patterns Questionnaire showed a significant decrease in crying and fussing duration, by 1 h in the evening (P = 0.001) and 30 min at night (P = 0.009). The median total amount of crying and fussing in a 24-h period was reduced from 6.12 to 3 h. The Edinburgh Postnatal Depression Scale showed a significant improvement in depressive symptoms, with the median score decreasing from 11 to 6 (P = 0.005). These findings are corroborated by an analysis of results for the subset of 16 participants whose babies were under 12 weeks of age (average age 4.71 weeks). These preliminary results demonstrate significantly decreased infant crying in the evening and during the night and improved maternal mood, validating an innovative interdisciplinary clinical intervention for cry-fuss problems in the first few months of life. This intervention, delivered by trained health professionals, has the potential to mitigate the costly problem of health professionals giving discipline-specific and conflicting advice post-birth.
Spatio-temporal dynamics on the distribution, extent, and net primary productivity of potential grassland in response to climate changes in China
Authors: Lin Huilong , Wang Xuelu , Zhang Yingjun , Liang Tiangang , Feng Qisheng , Ren Jizhou
Published: September 2013

Net primary productivity (NPP) of grassland is one of the key components in measuring the carrying capacity of livestock. Not only are grassland researchers concerned with the performance of NPP simulation models under current climate conditions, they also need to understand the behaviour of NPP–climate models under projected climatic changes. One of the goals of this study was to evaluate the three NPP–climate models: the Miami Model, the Schuur Model, and the Classification Indices-based Model. Results indicated that the Classification Indices-based Model was the most effective model at estimating large-scale grassland NPP. Both the Integrated Orderly Classification System of Grassland and the Classification Indices-based Model were then applied to analyse the succession of grassland biomes and to measure the change in total NPP (TNPP) of grassland biomes from the recent past (1950–2000) to a future scenario (2001–2050) in a geographic information system environment. Results of the simulations indicate that, under recent-past climatic conditions, the major biomes of China’s grassland are the tundra and alpine steppe, and steppe, and these would be converted into steppe and semi-desert grassland in the future scenario; the potential grassland TNPP in China was projected to be 0.72 PgC under recent-past climatic conditions, and would be 0.83 Pg C under the future climatic scenario. The ‘safe’ carrying capacity of livestock that best integrates a wide range of factors, such as grassland classes, climatic variability, and animal nutrition, is discussed as unresolved. Further research and development is needed to identify the regional trends for the ‘safe’ carrying capacity of livestock to maintain sustainable resource condition and reduce the risk of resource degradation. This important task remains a challenge for all grassland scientists and practitioners.
Development of class pedotransfer functions for integrating water retention properties into Portuguese soil maps
Authors: Ramos T. B. , Gonçalves M. C. , Brito D. , Martins J. C. , Pereira L. S.
Published: September 2013

Hydrological modellers have recently been challenged to improve watershed models by better integrating soil information into model applications. Reliable soil hydraulic information is thus necessary for better describing the water balance components at the catchment scale. Frequently, that information does not exist. This study presents a set of class-pedotransfer functions (PTFs) for estimating the water retention properties of Portuguese soils. The class-PTFs were established from a dataset containing 697 soil horizons/layers, by averaging values of total porosity and volumetric water contents at –0.25, –1, –3.2, –6.3, –10, –33, –100, –250, and –1500 kPa matric potentials after grouping data by soil texture class, soil horizon, and bulk density. Fitted retention curves using the van Genuchten model were also obtained for every class-PTF. The root mean square error varied between 0.039 and 0.057 cm3/cm3, with smaller values found when using the 12 texture classes of the International Soil Science Society (ISSS) system rather than the five texture classes of FAO, and when bulk density was also considered. The class-PTFs were then integrated into Portuguese soil maps and its usage was demonstrated by deriving maps of available water capacity to be used for modelling the water balance in a small catchment area with the SWAT model. The model successfully simulated the reservoir inflow when using the derived maps, but the results did not vary much whether using coarser or finer description of the catchment soils. Nonetheless, the class-PTFs contributed to a better soil characterisation than when using coarse-scaled information. The approach followed here was simple, inexpensive, and feasible for modellers with few resources but interested in considering the spatial variability of soil retention properties at large scales and in advancing hydrologic modelling in Portugal.
Impacts of Diet on Thiamine Status of Lake Ontario American Eels
Authors: Fitzsimons John D. , Brown Scott B. , Brown Lisa R. , Verreault Guy , Tardif Rémi , Drouillard Ken G. , Rush Scott A. , Lantry Jana R.
Published: September 2013

The Lake Ontario–upper St. Lawrence River (LOUSL) population of American Eels Anguilla rostrata (hereafter, “eels”) was once one of the most important groups of the species but is now in a state of serious decline. Given that thiamine deficiency has been observed in almost all of the top predators in Lake Ontario, we assessed the potential that a diet‐induced thiamine deficiency associated with consumption of Alewives Alosa pseudoharengus could be involved. Muscle thiamine was measured in eels from throughout the LOUSL corridor and was compared with putative threshold effect levels established from the literature. Mirex concentrations were used to separate Lake Ontario‐resident eels from non‐Lake Ontario‐resident eels. Stable isotope analyses of eel muscle samples and potential prey, including Alewives, were combined with mixing model software to infer the diets consumed by Lake Ontario eels. Although residence in Lake Ontario was associated with a significant decline in muscle thiamine concentration, estimated Alewife consumption by eels was unexpectedly low. Instead, mixing model results indicated that crayfish and Round Goby Neogobius melanostomus were the major prey. Both taxa are known to contain thiaminase and have the potential to cause thiamine deficiency, but there are no reports of thiamine deficiency associated with Round Goby consumption, thus implicating crayfish. There was no recovery in thiamine levels prior to the initiation of oceanic migration. As a result, thiamine levels of Lake Ontario‐resident eels prior to migration were only slightly above putative threshold effect levels for pathological and behavioral effects in Japanese Eels Anguilla japonica, but this would require confirmation with American Eels. Since thiamine levels are expected to decline further during migration, additional effects on eel behavior, reproduction, and survival seem probable. Because of panmixia, such effects—when combined with the relatively high reproductive potential of Lake Ontario‐resident eels—may have consequences for the entire species.
Experimental Transmission of VHSV Genotype IVb by Predation
Authors: Getchell Rodman G. , Cornwell Emily R. , Groocock Geoffrey H. , Wong Po Ting , Coffee Laura L. , Wooster Gregory A. , Bowser Paul R.
Published: September 2013

Preliminary surveillance of wild baitfish during the 2006 viral hemorrhagic septicemia virus genotype IVb (VHSV IVb) outbreaks indicated Emerald Shiners Notropis atherinoides and Bluntnose Minnow Pimephales notatus were infected with high levels of VHSV without showing clinical signs of disease. The movement and use of baitfish was recognized as the most probable vector for the introduction of VHSV to inland waters, such as Conesus Lake and Skaneateles Lake in New York, Budd Lake in Michigan, and Little Lake Butte des Morts and Lake Winnebago in Wisconsin. While numerous government agencies implemented restrictions to stop the movement of potentially infected baitfish into new waters and prevent the spread of VHSV IVb, until now, studies to investigate whether these initial introductions were by an oral route of infection have not occurred. Our studies identified infected Fathead Minnow Pimephales promelas as suitable vectors for transmitting VHSV IVb when fed to Tiger Muskellunge (♂ Northern Pike Esox lucius × ♀ Muskellunge Esox masquinongy) during laboratory trials. Six of 16 Tiger Muskellunge were infected with VHSV IVb after consumption of infected Fathead Minnows when assayed with quantitative reverse transcriptase polymerase chain reaction and viral isolation in cell culture. Weekly sampling of water and feces from these Tiger Muskellunge individually reared showed intermittent shedding of VHSV IVb. Those exposed to similarly VHSV IVb-inoculated fathead minnows by cohabitation only became infected in 1 case out of 16. A similar trial of 12 Tiger Muskellunge fed Round Goby Neogobius melanostomus that survived a VHSV IVb immersion challenge did not result in infection. Overall, our findings imply that consumption of infected wild baitfish may be a risk factor for introduction of VHSV.

Received April 3, 2013; accepted May 27, 2013
Exploring the generative potential between positive organizational scholarship and management, spirituality, and religion research
Authors: Lavine Marc , Bright David , Powley Edward H. , Cameron Kim S.
Published: September 2013

Though conceptually distinct, the fields of positive organizational scholarship (POS) and management, spirituality, and religion (MSR) consider various phenomena in common. In this paper, we address a range of topics that both disciplines explore, as well as topics that are exclusive
to one domain but that may inform and enrich the other. We identify shared criticisms that both domains have faced and highlight different paths each field has taken toward establishing legitimacy. Our aim is to identify mutually relevant terrain where MSR research and POS can inform and enrich
each other.
Impacts of the Lacey Act Amendment and the Voluntary Partnership Agreements on illegal logging: implications for global forest governance
Authors: Gan Jianbang , Cashore Benjamin , Stone Michael W.
Published: September 2013

Illegal logging has negatively impacted environmental, economic, and social conditions in forests around the world. Various policies have been stymied owing to the complex web of timber harvesting, processing, manufacturing, and consumption cutting across developed and developing countries. We examine the potential impacts of new initiatives that directly address illegal timber trade by the two largest importers, primarily the ‘Lacy Act Amendment’ (LAA) by the US and the ‘Voluntary Partnership Agreements’ (VPAs) by the EU. We assess their effects on economy-wide welfare, prices of wood and paper products, and timber harvests in individual countries/regions and the world. We estimate that the LAA and VPAs, by themselves, would have moderate impacts on reducing illegal logging (0.1–8.35% reductions in timber harvests in the countries with high illegal logging rates). Broader cooperation among producer and consumer countries and alignment of existing forest governance mechanisms with illegal logging control measures are critical to create synergies.
Explosive reconnection of double tearing modes in relativistic plasmas: application to the Crab flares
Authors: Baty H. , Petri J. , Zenitani S.
Published: August 2013

Magnetic reconnection associated to the double tearing mode is investigated by means of resistive relativistic magnetohydrodynamic simulations. A linearly unstable double current sheet system in two-dimensional Cartesian geometry is considered. For initial perturbations of large enough longitudinal wavelengths, a fast reconnection event is triggered by a secondary instability that is structurally driven by the non-linear evolution of the magnetic islands. The latter reconnection phase and time-scale appear to weakly depend on the plasma resistivity and magnetization parameter. We discuss the possible role of such explosive reconnection dynamics to explain the MeV flares observed in the Crab Pulsar nebula. Indeed, the time-scale and the critical minimum wavelength give constraints on the Lorentz factor of the striped wind and on the location of the emission region, respectively.
Chryseobacterium angstadtii sp. nov., isolated from a newt tank
Authors: Kirk Karen E. , Hoffman Jessica A. , Smith Katherine A. , Strahan Brittane L. , Failor Kevin C. , Krebs Jordan E. , Gale Andrew N. , Do Tri D. , Sontag Thomas C. , Batties Allison M. , Mistiszyn Kimberly , Newman Jeffrey D.
Published: August 2013

As part of an undergraduate microbiology course, a yellow–orange-pigmented, Gram-staining negative, rod-shaped, non-motile bacterial strain was isolated from a glass tank housing several red-spotted newts (Notophthalmus viridescens). The sequence of the 16S rRNA gene of this strain, designated KMT, was 97.4–98.0 % similar to those of the type strains ofChryseobacterium luteum,C. shigenseandC. vrystaatense, while the similarity levels for protein-coding genes were less than 94.7 % forrpoB, less than 92.1 % forgroELand less than 87.1 % forgyrB. These values are lower than for many other established distinct species. Polyphasic characterization and comparison to these relatives revealed that strain KMTwas similar to otherChryseobacteriumstrains in that it contained MK-6 as its major respiratory quinone and phosphatidylethanolamine as the most abundant polar lipid, produced flexirubin-type pigments, oxidase and catalase and primarily contained the fatty acids iso-C15 : 0, iso-C17 : 1ω9c, iso-C17 : 03-OH and summed feature 3 (comprising C16 : 1ω6cand/or C16 : 1ω7c). Based on the results of this study, strain KMTrepresents a novel species, for which the nameChryseobacterium angstadtiisp. nov. is proposed. The type strain is KMT( = ATCC BAA-2160T = NRRL B-59516T = KCTC 23297T).
Flavobacterium limnosediminis sp. nov., isolated from sediment of a freshwater lake
Authors: Lee Kihyun , Park Sang-Cheol , Yi Hana , Chun Jongsik
Published: August 2013

A Gram-stain-negative, rod-shaped, pale yellow, aerobic bacterial strain, JC2902T, was isolated from a sediment sample of Ungok Lake in Gochang, Republic of Korea. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain JC2902Tbelongs to the genusFlavobacteriumand forms a distinct phyletic line within a clade containing four recognized species of the genusFlavobacterium. The genomic relatedness between strain JC2902Tand closely related strains was calculated using average nucleotide identity values of whole genome sequences, which indicated that the new isolate represents a novel genomic species. Through comparison of chemotaxonomic and other phenotypic characteristics between strain JC2902Tand the type strains of the four phylogenetically related species, a number of characteristics differentiated strain JC2902Tfrom the previously described type strains. Differential characteristics of strain JC2902Tinclude fatty acid profiles, cellular motility, inability to grow on Luria–Bertani and tripticase soy agar media, and absence ofN-acetyl-β-glucosaminidase and flexirubin-type pigments. Based on data from this polyphasic taxonomic study, strain JC2902Tis considered to represent a novel species of the genusFlavobacterium, for which the nameFlavobacteriumlimnosediminissp. nov. is proposed. The type strain is JC2902T( = KACC 16937T = JCM 18661T).
Hantaan virus nucleocapsid protein stimulates MDM2-dependent p53 degradation
Authors: Park Sun-Whan , Han Myung-Guk , Park Chan , Ju Young Ran , Ahn Byung-Yoon , Ryou Jungsang
Published: September 2013

Apoptosis has been shown to be induced and downregulated by the Hantaan virus (HTNV) nucleocapsid (N) protein. To address these conflicting data, expression of the p53 protein, one of the key molecules involved in apoptosis, was assessed in the presence of the N protein in A549 and HeLa cells. The amount of p53, increased by drug treatment, was reduced when cells were infected with HTNV or transfected with an expression vector of the HTNV N protein. When cells were treated with a proteasome inhibitor (MG132) or an MDM2 antagonist (Nutlin-3), p53 expression was not reduced in N protein-overexpressed cells. We concluded that the HTNV N protein ubiquitinates and degrades p53 MDM2-dependently. Here we report downregulation of p53 expression through a post-translational mechanism: MDM2-dependent ubiquitination and degradation by the HTNV N protein. These results indicate that N protein-dependent p53 degradation through the ubiquitin proteasome system is one of the anti-apoptotic mechanisms employed by HTNV.
Characterization of protein–protein interaction domains within the baculovirus Autographa californica multiple nucleopolyhedrovirus late expression factor LEF-3
Authors: Downie Kelsey , Adetola Gbolagade , Carstens Eric B.
Published: August 2013

Autographa californica nucleopolyhedrovirus late expression factor 3 (LEF-3) is required for late viral gene expression probably through its numerous functions related to DNA replication, including nuclear localization of the virus helicase P143 and binding to ssDNA. LEF-3 appears to interact with itself as a homo-oligomer, although the details of this oligomeric structure are not yet known. To examine LEF-3–LEF-3 interactions, a bimolecular fluorescent protein complementation assay was used. Pairs of recombinant plasmids expressing full-length LEF-3 fused to one of two complementary fragments (V1 or V2) of a variant of yellow fluorescent protein named ‘Venus’ were constructed. Plasmids expressing fusions with complementary fragments of Venus were co-transfected into Sf21 cells and analysed by fluorescence microscopy. Co-transfected plasmids expressing full-length V1–LEF-3 and V2–LEF-3 showed positive fluorescence, confirming the formation of homo-oligomers. A series of truncated V1/V2–LEF-3 fusions was constructed and used to investigate interactions with one another as well as with full-length LEF-3.
Identification of Myosin XI Receptors in Arabidopsis Defines a Distinct Class of Transport Vesicles
Authors: Peremyslov Valera V. , Morgun Eva A. , Kurth Elizabeth G. , Makarova Kira S. , Koonin Eugene V. , Dolja Valerian V.
Published: August 2013

To characterize the mechanism through which myosin XI-K attaches to its principal endomembrane cargo, a yeast two-hybrid library of Arabidopsis thaliana cDNAs was screened using the myosin cargo binding domain as bait. This screen identified two previously uncharacterized transmembrane proteins (hereinafter myosin binding proteins or MyoB1/2) that share a myosin binding, conserved domain of unknown function 593 (DUF593). Additional screens revealed that MyoB1/2 also bind myosin XI-1, whereas myosin XI-I interacts with the distantly related MyoB7. The in vivo interactions of MyoB1/2 with myosin XI-K were confirmed by immunoprecipitation and colocalization analyses. In epidermal cells, the yellow fluorescent protein–tagged MyoB1/2 localize to vesicles that traffic in a myosin XI–dependent manner. Similar to myosin XI-K, MyoB1/2 accumulate in the tip-growing domain of elongating root hairs. Gene knockout analysis demonstrated that functional cooperation between myosin XI-K and MyoB proteins is required for proper plant development. Unexpectedly, the MyoB1-containing vesicles did not correspond to brefeldin A–sensitive Golgi and post-Golgi or prevacuolar compartments and did not colocalize with known exocytic or endosomal compartments. Phylogenomic analysis suggests that DUF593 emerged in primitive land plants and founded a multigene family that is conserved in all flowering plants. Collectively, these findings indicate that MyoB are membrane-anchored myosin receptors that define a distinct, plant-specific transport vesicle compartment.
bZIP67 Regulates the Omega-3 Fatty Acid Content of Arabidopsis Seed Oil by Activating FATTY ACID DESATURASE3
Authors: Mendes Ana , Kelly Amélie A. , van Erp Harrie , Shaw Eve , Powers Stephen J. , Kurup Smita , Eastmond Peter J.
Published: August 2013

Arabidopsis thaliana seed maturation is accompanied by the deposition of storage oil, rich in the essential ω-3 polyunsaturated fatty acid α-linolenic acid (ALA). The synthesis of ALA is highly responsive to the level of FATTY ACID DESATURASE3 (FAD3) expression, which is strongly upregulated during embryogenesis. By screening mutants in LEAFY COTYLEDON1 (LEC1)–inducible transcription factors using fatty acid profiling, we identified two mutants (lec1-like and bzip67) with a seed lipid phenotype. Both mutants share a substantial reduction in seed ALA content. Using a combination of in vivo and in vitro assays, we show that bZIP67 binds G-boxes in the FAD3 promoter and enhances FAD3 expression but that activation is conditional on bZIP67 association with LEC1-LIKE (L1L) and NUCLEAR FACTOR-YC2 (NF-YC2). Although FUSCA3 and ABSCISIC ACID INSENSITIVE3 are required for L1L and bZIP67 expression, neither protein is necessary for [bZIP67:L1L:NF-YC2] to activate FAD3. We conclude that a transcriptional complex containing L1L, NF-YC2, and bZIP67 is induced by LEC1 during embryogenesis and specifies high levels of ALA production for storage oil by activating FAD3 expression.
Finding the tool that fits best: cloud based task management for electronic resources
Authors: Ruttenberg Clara
Published: September 2013

Purpose

The article aims to examine how the University of Maryland, College Park, evaluated two specific task management software packages that could make the pre‐order workflow for electronic resources more transparent to library staff.

Design/methodology/approach

The results from an electronic resources gap analysis done at the University of Maryland, College Park, were used as a basis to evaluate and select task management systems.

Findings

Two electronic resource management systems, CORAL and License Manager, were selected. They were evaluated in the areas of task, license and vendor information management.

Originality/value

This paper provides criteria that could be used to evaluate tools that support license management for electronic resources.
Linking social and pathogen transmission networks using microbial genetics in giraffe (Giraffa camelopardalis)
Authors: VanderWaal Kimberly L. , Atwill Edward R. , Isbell Lynne. A. , McCowan Brenda
Published: September 2013

Although network analysis has drawn considerable attention as a promising tool for disease ecology, empirical research has been hindered by limitations in detecting the occurrence of pathogen transmission (who transmitted to whom) within social networks.

Using a novel approach, we utilize the genetics of a diverse microbe, Escherichia coli, to infer where direct or indirect transmission has occurred and use these data to construct transmission networks for a wild giraffe population (Giraffe camelopardalis). Individuals were considered to be a part of the same transmission chain and were interlinked in the transmission network if they shared genetic subtypes of E. coli.

By using microbial genetics to quantify who transmits to whom independently from the behavioural data on who is in contact with whom, we were able to directly investigate how the structure of contact networks influences the structure of the transmission network. To distinguish between the effects of social and environmental contact on transmission dynamics, the transmission network was compared with two separate contact networks defined from the behavioural data: a social network based on association patterns, and a spatial network based on patterns of home‐range overlap among individuals.

We found that links in the transmission network were more likely to occur between individuals that were strongly linked in the social network. Furthermore, individuals that had more numerous connections or that occupied ‘bottleneck’ positions in the social network tended to occupy similar positions in the transmission network. No similar correlations were observed between the spatial and transmission networks. This indicates that an individual's social network position is predictive of transmission network position, which has implications for identifying individuals that function as super‐spreaders or transmission bottlenecks in the population.

These results emphasize the importance of association patterns in understanding transmission dynamics, even for environmentally transmitted microbes like E. coli. This study is the first to use microbial genetics to construct and analyse transmission networks in a wildlife population and highlights the potential utility of an approach integrating microbial genetics with network analysis.
Enhancing retention of occupational therapists working in mental health: Relationships between wellbeing at work and turnover intention
Authors: Scanlan Justin Newton , Meredith Pamela , Poulsen Anne A.
Published: September 2013

Background/aim

Occupational therapists working in mental health who experience burnout, low work engagement or poor job satisfaction are at risk of poor wellbeing at work and may be more likely to leave their jobs. The aim of this project was to explore factors associated with wellbeing at work and turnover intention in a sample of occupational therapists working in mental health.

Methods

One hundred and three occupational therapists working in mental health in Queensland completed a survey exploring work/life balance, effort invested in work, rewards received from work, wellbeing at work (job satisfaction, burnout and work engagement) and turnover intention. Analyses were conducted to explore relationships between work/life balance, effort, reward, wellbeing at work and turnover intention.

Results

All measures of wellbeing at work were significantly associated with turnover intention. A large proportion (33%) of the variance in turnover intention was predicted by job satisfaction. Perceptions of both work/life balance and effort invested in work, as well as perceived rewards in terms of recognition, prestige and personal satisfaction were significantly associated with work‐related wellbeing scores.

Conclusions and significance of the study

Results from this study deepen the understanding of factors associated with wellbeing at work and turnover intention for occupational therapists in mental health. This knowledge will support the development of interventions aimed at reducing turnover intention and enhancing retention of occupational therapists in the mental health workforce.