bluuebunny/crossref_metadata_2025_split huggingface dataset:
A cross-validation-based approach for delimiting reliable home range estimates
Authors: Dougherty Eric R , Carlson Colin J , Blackburn Jason K , Getz Wayne M 
Published: July 2017

AbstractBackgroundWith decreasing costs of GPS telemetry devices, data repositories of animal movement paths are increasing almost exponentially in size. A series of complex statistical tools have been developed in conjunction with this increase in data. Each of these methods offers certain improvements over previously proposed methods, but each has certain assumptions or shortcomings that make its general application difficult. In the case of the recently developed Time Local Convex Hull (T-LoCoH) method, the subjectivity in parameter selection serves as one of the primary impediments to its more widespread use. While there are certain advantages to the flexibility it offers for question-driven research, the lack of an objective approach for parameter selection may prevent some users from exploring the benefits of the method.ResultsHere we present a cross-validation-based approach for selecting parameter values to optimize the T-LoCoH algorithm. We demonstrate the utility of the approach using a case study from the Etosha National Park anthrax system. Utilizing the proposed algorithm, rather than the guidelines in the T-LoCoH documentation, results in significantly different values for derived site fidelity metrics.ConclusionsDue to its basis in principles of cross-validation, the application of this method offers a more objective approach than the relatively subjective guidelines set forth in the T-LoCoH documentation and enables a more accurate basis for the comparison of home ranges among individuals and species, as well as among studies.
Imaging action potential in single mammalian neurons by tracking the accompanying sub-nanometer mechanical motion
Authors: Yang Yunze , Liu Xian-Wei , Yu Hui , Guan Yan , Wang Shaopeng , Tao Nongjian 
Published: July 2017

AbstractAction potentials in neurons have been studied traditionally by the patch clamp and more recently by the fluorescence detection methods. Here we describe a label-free optical imaging method that can measure mechanical motion in single cells with sub-nanometer detection limit and sub-millisecond temporal resolution. Using the method, we have observed sub-nanometer mechanical motion accompanying the action potential in single mammalian neurons. The shape and width of the transient displacement are similar to those of the electrically recorded action potential, but the amplitude varies from neuron to neuron, and from one region of a neuron to another, ranging from 0.2 - 0.4 nm. The work indicates that action potentials may be studied non-invasively in single mammalian neurons by label-free imaging of the accompanying subnanometer mechanical motion.
Secretion of redox-active metabolites as a general strategy for iron acquisition in plants
Authors: Rajniak Jakub , Giehl Ricardo F. , Chang Evelyn , Murgia Irene , von Wirén Nicolaus , Sattely Elizabeth S. 
Published: July 2017

AbstractIron is an essential but often poorly bioavailable nutrient due to its low solubility, especially in alkaline soils. Plants have evolved at least two distinct strategies to extract iron from soil: solubilization of ferric iron by phytosiderophores, and reduction to the ferrous form at the root surface followed by direct import. Here, we describe the discovery of a novel redox-active catecholic metabolite, termed sideretin, which derives from the coumarin fraxetin, and is the primary molecule exuded byArabidopsis thalianaroots in response to iron deficiency. Using a combination of metabolomics, heterologous expression, and coexpression analysis we have identified two enzymes that complete the biosynthetic pathway of sideretin. Chemical characterization of synthetic sideretin and biological assays with pathway mutants suggest that sideretin is critical for iron nutrition and support a role for small molecule-mediated iron reduction inA. thalianaunder iron-limiting growth conditions. Further, we show that sideretin production is evolutionarily ancient and occurs in eudicot species only distantly related toA. thaliana. In addition to sideretin, untargeted metabolomics of the root exudates of various eudicots revealed the production of structurally diverse redox-active molecules in response to iron deficiency. Our results indicate that secretion of small molecule reductants by roots may be a widespread and previously underappreciated component of the reduction-based iron uptake strategy.
Probabilistic language models in cognitive neuroscience: promises and pitfalls
Authors: Armeni Kristijan , Willems Roel M. , Frank Stefan 
Published: July 2017

AbstractCognitive neuroscientists of language comprehension study how neural computations relate to cognitive computations during comprehension. On the cognitive part of the equation, it is important that the computations and processing complexity are explicitly defined. Probabilistic language models can be used to give a computationally explicit account of language complexity during comprehension. Whereas such models have so far predominantly been evaluated against behavioral data, only recently have the models been used to explain neurobiological signals. Measures obtained from these models emphasize the probabilistic, information-processing view of language understanding and provide a set of tools that can be used for testing neural hypotheses about language comprehension. Here, we provide a cursory review of the theoretical foundations and example neuroimaging studies employing probabilistic language models. We high-light the advantages and potential pitfalls of this approach and indicate avenues for future research.
Dynamic semantic cognition: Characterising coherent and controlled conceptual retrieval through time using magnetoencephalography and chronometric transcranial magnetic stimulation
Authors: Teige Catarina , Mollo Giovanna , Millman Rebecca , Savill Nicola , Smallwood Jonathan , Cornelissen Piers L. , Jefferies Elizabeth 
Published: July 2017

AbstractDistinct neural processes are thought to support the retrieval of semantic information that is (i) coherent with strongly-encoded aspects of knowledge, and (ii) non-dominant yet relevant for the current task or context. While the brain regions that support coherent and controlled patterns of semantic retrieval are relatively well-characterised, the temporal dynamics of these processes are not well-understood. This study used magnetoencephalography (MEG) and dual-pulse chronometric transcranial magnetic stimulation (cTMS) in two separate experiments to examine temporal dynamics within the temporal lobe during the retrieval of strong and weak associations. MEG results revealed a dissociation within left temporal cortex: anterior temporal lobe (ATL) showed greater oscillatory response for strong than weak associations, while posterior middle temporal gyrus (pMTG) showed the reverse pattern. In the cTMS experiment, stimulation of ATL at ~150ms disrupted the efficient retrieval of strong associations, indicating a necessary role for ATL in coherent conceptual activations. Stimulation of pMTG at the onset of the second word disrupted the retrieval of weak associations, suggesting this site may maintain information about semantic context from the first word, allowing engagement of semantic control. Together these studies provide converging evidence for a functional dissociation within the temporal lobe, across both tasks and time.
Overexpression of Channelrhodopsin 2 interferes with the GABAb receptor-mediated depression of GABA release from the somatostatin-containing interneurons of the prefrontal cortex
Authors: Liu Lei , Ito Wataru , Morozov Alexei 
Published: July 2017

AbstractRegion and cell-type restricted expression of light activated ion channels is the indispensable tool to study properties of synapses in specific circuits and to monitor synaptic alterations by various stimuli including neuromodulators and behaviors, both ex vivo and in vivo. These analyses require the light-activated proteins or viral vectors for their delivery that do not interfere with the phenomenon under study. Here, we report a case of such interference in which the high-level expression of Channelrhodopsin-2 (ChR2) introduced in the somatostatin-positive GABAergic neurons (SOM-INs) of the dorsomedial prefrontal cortex (dmPFC) by an adeno-associated virus vector (AAV) weakens the presynaptic GABAb receptor-mediated suppression of GABA release.
Extracellular monomeric and aggregated tau efficiently enter human neurons through overlapping but distinct pathways
Authors: Wassmer T. , Evans L. , Fraser G. , Smith J. , Perkinton M. , Billinton A. , Livesey F.J. 
Published: July 2017

AbstractA current working model is that Alzheimer's disease actively spreads from diseased to healthy neurons, mediated by transfer of extracellular, abnormal, disease-specific forms of the microtubule-associated protein tau. It is currently unclear whether transfer of tau between neurons is a toxic gain-of-function process in dementia, or reflects a constitutive biological process. We report two mechanisms of entry of monomeric tau to neurons: a rapid early dynamin-dependent phase, and a second, slower actin-dependent phase, suggesting that monomeric tau enters neurons via rapid saturable clathrin-mediated endocytosis and also by bulk endocytosis. Aggregated tau entry is independent of actin polymerisation and largely dynamin dependent, consistent with clathrin-mediated endocytosis and distinct from macropinocytosis, the major route for aggregated tau entry reported for non-neuronal cells. Anti-tau antibodies abrogate tau entry into neurons, with tau carrying antibody with it into neurons, indicating that antibody binding is insufficient to prevent neuronal tau entry.
Introgression patterns between house mouse subspecies and species reveal genomic windows of frequent exchange
Authors: Ullrich Kristian Karsten , Linnenbrink Miriam , Tautz Diethard 
Published: July 2017

AbstractBased on whole genome sequencing data, we have studied the patterns of introgression in a phylogenetically well defined set of populations, sub-species and species of mice (Mus m. domesticus,Mus m. musculus,Mus m. castaneusandMus spretus). We find that many discrete genomic regions are subject to repeated and mutual introgression and exchange. The majority of these regions code for genes that are involved in parasite defense or genomic conflict. They include genes involved in adaptive immunity, such as the MHC region or antibody coding regions, but also genes involved in innate immune reactions of the epidermis. We find also clusters of KRAB zinc finger proteins that control the spread of transposable elements and genes that are involved in meiotic drive. These findings suggest that even well separated populations and species maintain the capacity to exchange genetic material in a special set of evolutionary active genes.
Performance of cactus mucilage and brown seaweed extract as a steel corrosion inhibitor in chloride contaminated alkaline media
Authors: Hernández Eddisson Francisco , Cano-Barrita Prisciliano Felipe de Jesus , León-Martínez Frank Manuel , Torres-Acosta Andres Antonio 
Published: July 2017

Purpose
This paper aims to present experimental results related to the performance of cactus mucilage (CM) and brown seaweed extracts (SEs) to inhibit reinforcing steel bar (rebar) corrosion in saturated calcium hydroxide alkaline solutions (pH = 12.5).

Design/methodology/approach
Electrochemical cells were prepared using CM solutions at 0.5, 1 and 1.38 per cent concentration (w/v), SE solutions at 0.5, 1, 1.38, 2 and 3 per cent concentration (w/v), sodium alginate at 1 per cent concentration (w/v) and calcium nitrite at 11.3 per cent (v/v). Each cell contained six deformed reinforcing steel bars of 9.5 mm nominal diameter. The experiments were performed at 23 ± 2°C in two stages. The first stage was aimed at stabilizing the rebar until passivation was reached. The second stage included adding NaCl in six steps from 0.5 to 16 g/L. Half-cell potential, linear polarization resistance and electrochemical impedance spectroscopy measurements were monitored during both stages.

Findings
The electrochemical test results indicated that both additions reduce the corrosion rate of rebars and pitting in an alkaline media with chloride ions (16 g/L NaCl). Electrochemical impedance spectroscopy results for rebars in natural-added solutions showed higher charge transfer resistance and double layer capacitance values, indicative of the formation of a second interface between the rebar and the electrolyte.

Research limitations/implications
The information obtained was for alkaline solutions only. Further investigation is performed using concrete as the alkaline electrolyte.

Practical implications
CM and SE may be suitable low-cost corrosion inhibitors for steel in concrete.

Social implications
The use of botanical or algae products for this application will encourage people to consider its production for this particular application. Also, the possible harvest in an environmental friendly way will diminish in the future the use of biohazards and toxic inhibitors.

Originality/value
This investigation is a continuation of a one presented in 2007, which uses only nopal mucilage. This new investigation corroborates what was concluded in the early investigation and incorporates a new natural by product, algae, as a possible corrosion inhibitor product.
Corrosion problems in the oil country tubular goods and their mitigation – a review
Authors: Cao Shan , He Faqing , Gao Jinwei 
Published: July 2017

PurposeImportant reserves of oil and gas, which are left to be discovered and produced, are mainly concentrated in challenging locations and under severe conditions such as high pressure (HP)/high temperature (HT). The presence of aggressive environments including H2S, CO2and chlorides plus HP/HT causes a series of corrosion problems, which cost the oil industry billions of dollars a year. Thus, there is an increasing challenge for tubes (i.e. oil country tubular goods, for short, OCTG) used in producing oil and gas. The purpose of this study is to summarize different kinds of corrosion problems and their mitigation, to more efficiently protect OCTG from corrosion.Design/methodology/approachTo effectively select proper mitigation methods, the mechanism of corrosion must be understood, which can be classified into four categories: sweet corrosion, sour corrosion, galvanic corrosion and microbiologically induced corrosion. Also, the effects of environmental and material factors on the corrosion rate are presented. Subsequently, current technology of mitigating these corrosion problems has been discussed, including the development of materials, application of chemical inhibitors and application of protective layers.FindingsIt is stressed that limits exist for each individual mitigation method; therefore, a careful balance between economic life of OCTG and safety in operation is required.Originality/valueThe main purpose of this essay is to give a brief review and detailed introduction and analysis about those technologies.
Effectiveness of Si contents in the steel composition on the corrosion performance of galvanized steel
Authors: Abdel Hamid Zeinab , Abd El Rehim Sayed , Ibrahim Moustafa 
Published: July 2017

Purpose
The purpose of this work was to investigate the effect of Si content of steel substrate on the performance of the hot-dip galvanized layer. Moreover, the structure of the galvanized layers and the corrosion performance of the galvanized steel in 3.5 per cent NaCl solution have been studied.

Design/methodology/approach
The galvanized layer has been formed by the hot-dip technique, and the influence of silicon content in the steel composition on the corrosion performance of the galvanized steel was estimated. The surface morphologies and chemical compositions of the coated layers were assessed using scanning electron microscopy and energy-dispersive X-ray analysis, respectively. Potentiodynamic polarization Tafel lines and electrochemical impedance spectroscopy (EIS) tests were used to evaluate the corrosion resistance of the galvanized steel in 3.5 per cent NaCl solution.

Findings
The results proved that adhere, compact and continuous coatings were formed with steel containing 0.56 Wt.% Si, while cracks and overly thick coatings were obtained with steel containing 1.46 Wt.% Si. Tafel plots illustrated that the corrosion rate of galvanized steel containing 0.08 and 0.56 Wt.% Si was lower than that of the galvanized steel containing 1.46 Wt.% Si. Also, the results of the EIS reveal that the impedance of the galvanized steel containing 0.08 and 0.56 Wt.% Si was the highest and the lowest, respectively, with the steel containing 1.46 Wt.% Si.

Social implications
Generally, in industry steels containing high amounts of silicon (0.15-0.25 Wt.%) can be galvanized satisfactory either by controlling the temperature (440°C) or adding Ni to the galvanized bath. The low temperature reduces the coating thickness; nickel amount must be controlled to prevent the formation of higher amounts of dross. This study proved that high Si steel of up to 0.56 Wt.% can be galvanized at 460°C without adding Ni to the galvanized bath and form adhere, compact, free cracks and have good corrosion resistance. Consequently, a social benefit can be associated with galvanizing high Si steel, leading to an increase in the cost of the process.

Originality/value
The results presented in this work are an insight into understanding the hot-dip galvanizing of high Si steel. The corrosion resistance of galvanized steel containing 0.56 Wt.% Si alloys has been considered as a promising behavior. In this work, a consistent assessment of the results was achieved on the laboratory scale.
Chickens, aprons, markets, and cans
Authors: Marsh Emily 
Published: July 2017

PurposeThis paper describes how the content management system (CMS) Omeka supports the representation and presentation of the National Agricultural Library’s (NAL’s) digital exhibits, including some observations on its strengths and weaknesses. It also looks at Omeka’s major features through a theoretical lens of exhibit orientation that provides another way to assess it as a digital content tool.Design/methodology/approachThe case study method was selected to review four comparable exhibits from the same institution. The Omeka software was evaluated through a lens of exhibit design that includes two orientations (object vs information) and multiple goals (object identification and display, engagement, interpretation and education).FindingsOmeka is a valuable tool for digital exhibits because of its strength in knowledge representation through a standard metadata scheme, the ability to group items that have some aspect in common such as author or topic, and its support of narrative exhibits incorporating text and images. Omeka needs some additional support, however, to fulfill more complex goals such as user engagement, object interpretation and user education.Originality/valueThe paper grounds the examination of Omeka within a theoretical framework of exhibit orientation that enriches its observations and conclusions.
Is cybersecurity eating internet governance? Causes and consequences of alternative framings
Authors: Mueller Milton 
Published: July 2017

Purpose
The purpose of this paper is to clarify the relationship between cybersecurity governance and internet governance and to explore the effects of the current tendency for cybersecurity-related discourse to dominate and change the way we approach the established problems of internet governance.

Design/methodology/approach
The paper demonstrates the centrality of internet connectivity to any definition of cyberspace and to cybersecurity, which clarifies the way internet governance and cybersecurity governance are interdependent. Drawing on classic notions of a security dilemma, the paper also argues for distinguishing between national cybersecurity and societal cybersecurity.

Findings
Major structural features of the governance problem in cybersecurity and internet governance are analogous. Joint production of internet services and cybersecurity makes them heavily interdependent. This means that cybersecurity governance and internet governance models need to be compatible, and the approach we take to one will influence how we approach the other.

Originality/value
The interdependence of cybersecurity governance and internet governance has not been carefully examined before, and the relationship is not well understood. These two strands of thinking about cyberspace governance have not been properly connected. This paper bridges the gap and makes policymakers more aware of the potential tensions between a cybersecurity perspective and an internet governance perspective.
A cuckoo search optimisation-based Grey prediction model for thermal error compensation on CNC machine tools
Authors: Abdulshahed Ali M. , Longstaff Andrew P. , Fletcher Simon 
Published: July 2017

Purpose
The purpose of this paper is to produce an intelligent technique for modelling machine tool errors caused by the thermal distortion of Computer Numerical Control (CNC) machine tools. A new metaheuristic method, the cuckoo search (CS) algorithm, based on the life of a bird family is proposed to optimize the GMC(1, N) coefficients. It is then used to predict thermal error on a small vertical milling centre based on selected sensors.

Design/methodology/approach
A Grey model with convolution integral GMC(1, N) is used to design a thermal prediction model. To enhance the accuracy of the proposed model, the generation coefficients of GMC(1, N) are optimized using a new metaheuristic method, called the CS algorithm.

Findings
The results demonstrate good agreement between the experimental and predicted thermal error. It can therefore be concluded that it is possible to optimize a Grey model using the CS algorithm, which can be used to predict the thermal error of a CNC machine tool.

Originality/value
An attempt has been made for the first time to apply CS algorithm for calibrating the GMC(1, N) model. The proposed CS-based Grey model has been validated and compared with particle swarm optimization (PSO) based Grey model. Simulations and comparison show that the CS algorithm outperforms PSO and can act as an alternative optmization algorithm for Grey models that can be used for thermal error compensation.
Culture EPC oil and gas project in Vietnam: grounded theory
Authors: Ban Tran Van , Hadikusumo Bonaventura H.W. 
Published: July 2017

PurposeEngineering-procurement-construction (EPC) projects in the oil and gas industry are special projects involving diverse cultures, behaviours and complexity in global business. Among these elements, culture is a crucial factor contributing to project performance. Several studies have been conducted on culture and its impact on project performance, especially in construction. However, studies on the cultural factors affecting EPC projects have not yet been carried out, especially for projects in the oil and gas industry. Thus, this study aims to explore and identify the cultural factors that affect the performance of oil and gas EPC projects in Vietnam.Design/methodology/approachIn all, 60 people with experience in EPC projects were interviewed for the study. Axial and selective coding were used to build the final grounded theory.FindingsThe research findings show that the main cultural factors affecting the performance of EPC projects are leadership, organisation, planning, communication, human resources, goal and orientation.Originality/valueThis study provides empirical evidence for the importance of cultural factors that affect the success of EPC projects. It can serve as a guide on how to manage EPC projects and how to overcome the cultural difficulties in oil and gas EPC projects in Vietnam.