Miracle-dz/UniFAR-FTUs huggingface dataset:
Surface Temperature Measurements in an Industrial Gas Turbine Using Thermal History Paints

The measurement of surface temperatures of hot-gas path components of gas turbines under operating conditions provides a considerable challenge because the complexity of measurements under the prevailing conditions is substantial. The results from temperature measurements from an engine test using Thermal History Paint (THP) are presented here. The sensor material in the THP is an oxide ceramic which is doped with lanthanide ions to make the material luminescent. The properties of the luminescence depend on the temperature of exposure. The paper describes the first application of this technology in an extended, rather than dedicated, engine test in which components in both the hot gas path and the secondary air system were coated with THP. During the test campaign the engine components operated below maximum temperature for extended periods of time, which required a novel approach to the calibration of the paint. An overview over the correspondence between the temperatures measured with the THP, thermal paints and CFD calculations is provided for a sideplate and turbine blade. There is very good correlation between the results of the different methods. For the sideplate, the temperature measured with the THP was within 10K of the CFD calculation. Furthermore, the THP exhibited only minor erosion damage after over 50 hours of engine testing. The high durability and measurement accuracy demonstrate the feasibility of using the THP in extended engine tests.
Ann Oper Res 2 Spot price volatility and bid structure in the electricity market

Australian Electricity Market has experienced high price volatility since the deregulation in early 1990s. In this exploratory and preliminary analysis of 2010 data from South Australian electricity market we identify and exhibit a number of phenomena which, arguably, contribute to (A) high cost of electricity supply to consumers and (B) volatility in spot prices. These phenomena include: (i) Distinct bidding patterns of some generators occurring in trading intervals corresponding to periods of low, medium and high spot prices, (ii) Low correlation between electricity demand and spot prices on days when spot price spikes are observed, (iii) Failure of the lottery model and associated Markowitz-type optimisation approaches to adequately explain the shifting structure of generators’ bids and (iv) Unexpectedly high contribution to the consumers costs and risks from the relatively small number of trading intervals where spot price spikes were observed.
The influence of measurement model choice for randomized controlled trial results

Objective In randomised controlled trials (RCT), outcome variables are often patient reported outcomes (PRO) measured with questionnaires. Ideally, all available item information is used for score construction, which requires an item response theory (IRT) measurement model. However, in practice, the classical test theory measurement model (sum scores) is mostly used, and differences between response patterns leading to the same sum score are ignored. The enhanced differentiation between scores with IRT enables more precise estimation of individual trajectories over time, and group effects. The objective of this study is to show the advantages of using IRT scores instead of sum scores when analyzing RCT’s. Study Design and Settings Two studies are presented, a real life RCT, and a simulation study. Both IRT and sum scores are used to measure the construct and are subsequently used as outcomes for effect calculation. Results The bias in RCT results is conditional on the measurement model that Corresponding author. PO Box 7057, 1007 MB Amsterdam, The Netherlands, tel: +31 (0)20 4446038, E-mail: r.gorter@vumc.nl Preprint submitted to Journal of Clinical Epidemiology June 20, 2016 M AN US CR IP T AC CE PT ED ACCEPTED MANUSCRIPT was used to construct the scores. A bias in estimated trend of around one standard deviation was found when sum scores were used, where IRT showed negligible bias. Conclusion Accurate statistical inferences are made from an RCT study when using IRT to estimate construct measurements. The use of sum scores leads to incorrect RCT results.
A Leadership and Professional Development Teaching and Learning Model for Undergraduate Management Programs

This article describes a holistic leadership and professional development teaching and learning model for undergraduate students with universal application across all disciplines and functional areas of organizations due to its emphasis on the non-technical skill requirements of leadership. The model highlights the development of intrapersonal, interpersonal and professionalism skills or KSAs (knowledge, skills and abilities) and uses the mnemonics FOCUS and ACTION to structure the large number of traits, behaviors and KSAs. The model is useful in the early stages of career development as it succinctly identifies management competencies expected of emerging leaders, signaling a readiness for the leadership pipeline.
Correlation Between Gas Chromatography – Mass Spectrometry ( GC-MS ) and Attenuated Total Reflection Fourier Transform Infrared ( ATR FTIR ) Established the Validity of this Method to Assess Quickly and Reliably the Lipid Content of Microbial Cells

There is a growing interest worldwide for the production of renewable oil without mobilizing agriculture lands, fast and reliable methods are needed to identify highly oleaginous micro-organisms of potential industrial interest. The aim of this study was to demonstrate the relevance of ATR spectroscopy to achieve this goal. To do so, the total lipid content of lyophilized samples of five Streptomyces strains with varying DOI: 10.1177/0003702817709459 lipid content was assessed with two classical quantitative but time consuming methods, gas chromatography–mass spectrometry (GC-MS) and attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy in transmission mode with KBr pellets and the fast ATR method, often questioned for its lack of reliability. A linear correlation between these three methods was demonstrated allowing the establishment of equations to convert ATR values expressed as CO/amide I ratio, into μg of lipid per mg of biomass. The ATR method proved to be as reliable and quantitative as the classical GC-MS and FT-IR in transmission mode methods but faster and more reproducible than the latter since it involves far less manipulation for sample preparation than the two others. ATR could be regarded as an efficient fast screening method to identify natural or genetically modified oleaginous microorganisms by the scientific community working in the field of bio-lipids.
Evaluation of Openers for Seeding Meadow Brome Grass (Bromus riparius) Using Air Delivery Seeding Systems

Abstract There is interest in Canada in seeding grass seed using air seeders and air drills that were originally designed for seeding cereals and oilseeds. These seeders use an air delivery system to move the seed from large grain tanks on the seeder to the cultivator furrow openers for seed placement in the ground. Various types of furrow openers (i.e. spoons or knives) were evaluated for their effectiveness in placing meadow brome grass seed (Bromus riparius [Rehmann]) in the ground. Knife openers provided the best seed emergence results. Seed brakes and variable air velocities were also evaluated as a means of preventing the seed from blowing out of the seed row when using high air velocities. The screen-type seed brakes were prone to plugging with the grass seed. Acceptable seeding results were achieved without seed brakes when used at low air velocities; however, at these lower air velocities, seed distribution may be less accurate. It was also shown that when monoammonium phosphate (11-51-0) was mixed with the meadow brome grass seed at 33 kg·ha−1 as a means of preventing seed bridging in the delivery system, the seedling emergence counts were significantly less than applying the fertilizer at the point where the seed enters the openers.
Performance of Non Co-phase EGC Diversity Technique with Multiple Antennas on Limited Space

The Equal Gain Combining (EGC) diversity technique is generally known to have a performance close to an optimal Maximal Ratio Combining (MRC) technique while being less complex for realization. Hence, the implementation of EGC in practice is of interest; however the implementation of EGC diversity is cumbersome due to additional circuitry required for making a co-phase signal in each branch. As a result, it is interesting to investigate whether non co-phase EGC diversity is able to provide an acceptable performance while keeping much greatersimplicity with only marginally inferior as compared to co-phase method. This paper studies performance of non co-phase EGC diversity through the problem of limited space on WLAN terminal. This is because the diversity technique in real application cannot determine antenna spacing as large as required in theory. Therefore, it is impossible to avoid the effect of antenna correlation due to limited space. Also in this paper, the measurements of WLAN signals are undertaken in order to justify the use of proposed system. The results reveal that non co-phase EGC diversity provides a benefit on enhancing signal strengths where its performance depends on number of antennas and type of fading channels.
Conducting polymers and corrosion. III. A scanning vibrating electrode study of poly(3-octyl pyrrole) on steel and aluminum

Electroactive conducting polymers (ECPs) continue to be of considerable interest as components of corrosion-resistant coating s ystems. ECPs, in addition to being conductive, are redox active materials, typically with potentials that are positive of iron and a luminum. Thus, as with chromate, interesting and potentially beneficial interactions of ECPs with active metal alloys such as steel and aluminum are anticipated. In this work, the scanning vibrating electrode technique (SVET), also known as the current density probe, was used to probe such interactions between a poly(3-octyl pyrrole) coating (POP) and cold-rolled steel and aluminum (Al 2024-T3) substrates. The POP coatings were scribed to simulate a defect through the coating to the metal substrate surface. The SVET was used to map the current flowing in and around the defect while the sample was immersed in either 3% NaCl (steel) or in dilute Harrison solution (aluminum), an aqueous solution consisting of 0.35% (NH 4)2SO4, 0.05% NaCl. Although there were significant differences in the behavior of the POP-coated steel and POP-coated aluminum substrates, both exhibited a significant delay before the onset of any observable current compared to uncoated or epoxy-coated samples. Current density maps for the ste el clearly indicate that the reduction reaction occurred on the conducting polymer surface, with oxidation confined to the defect. Current density maps for the aluminum alloy never displayed significant oxidation at the defect. Rather, reduction (after a signifi cant delay) occurred at the defect as well as across the polymer surface, with concomitant localized undercoating oxidation of the al uminum substrate. © 2000 The Electrochemical Society. S0013-4651(00)01-029-6. All rights reserved.
Non-uniform ramping losses and thermal optimization with turn-to-turn resistivity grading in a (RE)Ba2Cu3Ox magnet consisting of multiple no-insulation pancake coils

This paper presents a study on the ramping losses of a high temperature superconductor (HTS) magnet consisting of multiple no-insulation (NI) (RE)Ba2Cu3Ox coils. The (RE)Ba2Cu3Ox (REBCO) conductor is the second generation HTS thin tape, where RE stands for rare-earth. During a ramping operation of the NI HTS magnet, losses are generated both across turn-to-turn resistances and inside superconducting layers. The former comes with radial current, which is called “turn-to-turn loss;” the latter one is induced by flux creep and jump, called “magnetization loss. ” The modeling and experimental studies on the ramping losses have been reported on single NI pancake coils in the previous part. In a HTS magnet consisting of multiple NI coils, the electromagnetic coupling between coils has a considerable influence on the distribution of ramping losses. Here, the experimentally validated model is used to investigate a HTS magnet consisting of 14 single pancake REBCO coils. The results show that both the turn-to-turn l.
Hydrodynamic Modelling of Marine Renewable Energy Devices : A State of the Art Review

This paper reviews key issues in the physical and numerical modelling of marine renewable energy systems, including wave energy devices, current turbines, and offshore wind turbines. The paper starts with an overview of the types of devices considered, and introduces some key studies in marine renewable energy modelling research. The development of new International Towing Tank Conference (ITTC) guidelines for model testing these devices is placed in the context of guidelines developed or under development by other international bodies as well as via research projects. Some particular challenges are introduced in the experimental and numerical modelling and testing of these devices, including the simulation of Power-Take-Off systems (PTOs) for physical models of all devices, approaches for numerical modelling of devices, and the correct modelling of wind load on offshore wind turbines. Finally, issues related to the uncertainty in performance prediction from model test results are discussed. The paper is based on the report of the International Towing Tank Conference specialist committee on Hydrodynamic Modelling of Marine Renewable Energy Devices to the 27 ITTC held in Copenhagen, Denmark in 2014 (ITTC, 2014a).
Neurolinguistics, Language and Time: investigating the verbal art in its amplitude

In this paper, we depart from the two-dimensional structure of language, as proposed by Jakobson, in order to conduct an investigation in which Neurolinguistics and Mathematics are articulated with the purpose to discuss issues involving the study of language disorders. The language of mathematics allows for portraying the real as a process. And that was the means by which, instead of establishing reflections about language in the two-dimensional structure, we proceeded to study it under a three-dimensional perspective that takes into account the factor time in the vector space, characterized as a space of probabilities. We have established a counterpoint between truncated enunciations by subjects with language disorders and enunciation according to the poetic function as defined by Jakobson. Although Jakobson refers to language (with its standing structure) and neglects speech in the bipolar structure, in this study, we propose the articulation of speech to the element time, thus providing the structure of language with a third dimension. We concluded that language learning places enunciation in a structure where time counts; the temporal element crosses linguistic particularities and inserts a value in enunciation, thus opening possibilities in meaning change (an event, according to Pecheux, 2002), and this makes the subject viable by guaranteeing him quality of life.
University ’ s repository of research publications and other research outputs Improving search personalisation with dynamic group formation Conference or Workshop Item

Recent research has shown that the performance of search engines can be improved by enriching a user’s personal profile with information about other users with shared interests. In the existing approaches, groups of similar users are often statically determined, e.g., based on the common documents that users clicked. However, these static grouping methods are query-independent and neglect the fact that users in a group may have different interests with respect to different topics. In this paper, we argue that common interest groups should be dynamically constructed in response to the user’s input query. We propose a personalisation framework in which a user profile is enriched using information from other users dynamically grouped with respect to an input query. The experimental results on query logs from a major commercial web search engine demonstrate that our framework improves the performance of the web search engine and also achieves better performance than the static grouping method.
Research of Enterprise Project Chain Risk Element Transmission Based on Complex Network Model

In order to research of enterprise project chain risk element transmission, constructed the enterprise project chain network model based on a complex network and analyzed the complex network characteristics. Take the mean-field theory to analyze the project chain risk element transmission and get the critical value of project chain transmission. The simulation results show that the project chain has the typical characteristics of a complex network. The distribution of it obeys the power law with lower average path length and higher clustering coefficient. It is a typical scale-free network. Based on randomly selecting risk nodes and the key risk nodes, simulate the relationship between transfer rate and the density of project chain risk nodes. It can provide reference for enterprise to make decision of project chain risk prevention. Finally, improve the whole project chain risk management efficiency and valuably.
Design of flexible piezoelectric energy harvesting device with optimized performance

In this paper, we demonstrate fabrication of environmental friendly flexible piezoelectric generator and propose optimization strategy for its performance by a formation of stress concentrators in the piezoelectric material. The entire structure is characterized with improved electrical response to mechanical stimuli, although the thickness of the used piezoelectric film is in nanosized range. Piezoelectric oxide films are grown by vacuum sputtering and patterned in a specific way by applying lift-off microfabrication technology. The design is based on simulation analysis, showing a concentration of peak stress in specific areas, causing enhanced charge generation. As a result, the piezoelectric coefficient of 11.28 pC/N is achieved and it is superior, compared to the device without concentrators. This value is competitive to devices using lead-containing lead zirconium titanate (PZT), as well as to devices with millimeter thickness of the piezoelectric material. Vibrational dynamic test in the lowfrequency range up to 50 Hz shows that the generated voltage after patterning increases with 12.8 %, reaching ~677 mV. In addition, the device with concentrators can stand 187 000 bends without failure and the useful capacity, which is greater than 250 pF, decreases by 7%.
First confirmed report on Fusarium sporotrichioides on Pinus ponderosa var. jeffreyi in Slovakia

Ivanová H. , Hrehová Ľ. , Pristaš P. (2016): First confirmed report on Fusarium sporotrichioides on Pinus ponderosa var. jeffreyi in Slovakia. Plant Protect. Sci., 52: 250–253. During 2014–2015, samples from ten 20–25 years old pine (Pinus ponderosa var. jeffreyi) trees showing wilt symptoms were collected from the Arborétum Mlyňany park. A disease was observed on 20% of the trees. The first symptoms are wilting, stunting, chlorosis, and discolouration of needles, which turned yellow on affected twigs, then red and finally they fell off. Isolations of the pathogen were done from the discoloured tissues of needles (twenty samples from each tree) on Potato Dextrose Agar. Colonies of the fungus (3–4 Petri dishes from each tree) were initially aerial, white or slightly violet, but with age they became red and red pigments were produced in agar. The observed micromorphological characteristics of the fungus, such as presence of simple and proliferating conidiophores with polyphialides, microconidia, macroconidial shape, and chlamydospore presence matched the description of Fusarium sporotrichioides. The identity of the fungus was confirmed by phylogenetic analysis of internal transcribed spacer (ITS) sequences. Sequence comparisons placed the fungus to the species F. sporotrichioides with similarity of 99.6% at the ITS sequence level.
Behavioral Functioning in Children With Attention-Deficit / Hyperactivity Disorder How the Individual Alpha Peak Frequency Helps Unravel the Neurophysiologic Underpinnings of

Attention-deficit/hyperactivity disorder (ADHD) has been associated with an elevated resting-state theta/beta power ratio and elevated theta power. However, the potential confounding effect of a low individual alpha peak frequency (IAPF) on the theta-power estimate has often been disregarded when studying the relationship between ADHD and the theta/beta power ratio or theta power alone. The aim of the present study was to assess whether the theta/beta power ratio and relative theta power are correlated with behavioral functioning in children with ADHD, as expected from previous studies. Subsequently, the influence of IAPF and the amount of supposed overlap between the individually determined alpha-band and the fixed theta-band were studied. For 38 children (aged 8-15 years), electroencephalographic (EEG) and investigator-scored ADHD Rating Scale IV data were available. Additional neurocognitive data were available for 32 children. As expected, the theta/beta power ratio and theta were positively related to the ADHD core symptoms. This relationship strengthened when controlling for IAPF, although correlations did not significantly differ from one another. Eight of 38 children (21%) showed a supposed overlap between their individually determined alpha band and the theta band. Neurocognitive performance did not show any relationship with the theta/beta power ratio or theta. The results of this study confirm that the theta/beta power ratio and theta power are indeed correlated with behavioral symptoms in children with ADHD and underscore the relevance of taking the IAPF into account.
DIRECT-FED MICROBIALS AND ENZYMES FOR DAIRY COWS

Upon birth, the digestive tracts of all animals are naturally colonized by a variety of microorganisms (Savage, 1987). Under healthy and non-stressful conditions, beneficial microflora colonize gut surfaces in a symbiotic relationship with the host and undesirable microbes, which may be pathogenic, are suppressed. Beneficial gut microorganisms supply nutrients to the host, aid in digestion of dietary nutrients, and compete with potential pathogens. When animals are raised in sterile environments and microorganisms are prevented from colonizing the digestive tract, animals often have increased nutritional needs (e.g., more vitamin K in the diet) and abnormal immune response. Sterile animals also are more susceptible to bacterial infections, presumably due to rapid establishment of pathogens which have no competition from normal microflora.