Miracle-dz/UniFAR-FTUs huggingface dataset:
Helicopter rotor aeroelastic stability evaluation using Lyapunov exponents

This work presents the application of Lyapunov Characteristic Exponents (LCEs), or in short Lyapunov Exponents, to the evaluation of rotorcraft aeroelastic stability. Current state of art literature on rotorcraft aeroelastic stability analysis approaches the problem by either using a constant coefficient approximation or by computing the eigenvalues of the monodromy matrix according to Floquet Theory. The former neglects periodicity and the latter is only applicable to the perturbation of the problem about a periodic orbit. Often such approximations are acceptable; however, LCEs can be applied to generic trajectories of non-linear systems to produce an estimate of the stability properties without the need to reach a steady orbit or determine the period of the system. Being more general, LCEs can provide a common environment in rotorcraft aeroelastic stability among both linear and non-linear systems, and be applicable to all problems that can be proficiently analyzed by time marching analysis, including experimental data. This work presents the evaluation of the stability of an isolated rotor formulated as a linear time-periodic system by computing the LCEs from arbitrary fiducial trajectories. The method is illustrated in relation with the problem of rigid helicopter blade flapping, and ground resonance with one damper inoperative and with non-linear dampers.
A Service Chain Discovery and Recommendation Scheme Using Complex Network Theory

Service chain discovery and recommendation are significant in services composition. A complex network module based algorithm using services invocable relations is proposed to search useful service chains on the network. Furthermore, a new scheme for discovering composite services processes automatically and recommending service chains by ranking their QoS is provided. Simulations are carried out and the results indicate that some useful service chains in the dataset provided by the WSC2009 can be found by the new algorithm.
Influence of acetogenic versus propiogenic supplements on adipose tissue accretion in stocker steers grazing ryegrass pasture

Influence of Acetogenic versus Propiogenic Supplements on Adipose Tissue Accretion in Stocker Steers Grazing Ryegrass Pastures. (May 2006) Emalee Kate Bumpus, B.S., University of Tennessee at Martin Chair of Advisory Committee: Dr. Jason E. Sawyer Fifty-eight high grade Bonsmara steers were used to evaluate effects of highfiber versus high-starch pasture supplements on subcutaneous (s.c.) and intramuscular (i.m.) adipose tissue accretion during growing and finishing phases. Cattle were stratified by body weight (BW), randomly assigned to one of three treatments, and placed on irrigated ryegrass pastures. Treatments were 1) no supplement (NC); 2) commercially available, pelleted high roughage (HR) supplement, designed to promote higher acetate fermentation, fed at 1.36 kg/hd (as-fed) 6 d/wk; or 3) corn-based high starch (HS) supplement, designed to promote higher propionate fermentation, fed at the same rate and frequency as HR. Throughout growing (140 d) and finishing (119 d) phases, full BW was measured every 28 d. Ultrasound ribeye area (REA), percent i.m. fat (IMF), and 12 rib fat thickness (BF) were measured on d -15, 56, 112, 182, and 231. Mixed model repeated measures analysis was performed on growth performance and ultrasound data. All responses increased over time (P < 0.01). Treatment by time interaction (P = 0.05) for BW was due to treatment rank changes among days; within day separations were minimal. Neither treatment nor interaction affected (P > 0.20) IMF, but treatment influenced ultrasound REA (P = 0.05); HS-fed steers had larger REA than
Potential effects of climate change on high- and low- abundance populations of the Gaboon viper (Bitis gabonica) and the nose-horned viper (B. nasicornis) in southern Nigeria

During the last 15 years, intensive field research has been conducted on the ecology and population abundance of the Gaboon viper (Bitis gabonica) and the nose-horned viper (Bitis nasicornis) in southern Nigeria. During these studies, we determined the occurrence of several high-abundance and low-abundance populations for these two species. In the present study, we analysed the potential effects of climate change by modelling the current dataset on viper abundance (both high and low) using generalized additive models. We used climatic surfaces of current conditions as spatially explicit predictors, and projected viper abundance into a future climatic scenario. The future climatic conditions seemed appropriate for a wide extension of the climatic niche for high-abundance Gaboon viper populations across our study area. On the contrary, the future climatic niche for high-abundance nose-horned viper populations is predicted to become narrower than at present. In future scenarios, the two species are predicted to have a larger overlap in their climatic niche, which is likely to increase interspecific competition.
Hypermedia Literacy : An Insight into English as a Foreign Language Online Reading Processes

The advent of the Internet has generated new ways of reading for knowledge, suggesting that digital literacy is a necessity for students of this new era. Even so, there is still a dearth of knowledge in the field that can provide rich theoretical descriptions of online reading processes of English as a Foreign Language (EFL) readers in the hypertext environment. This article elucidates the perceptual learning styles and the metacognitive reading strategies of English as a Foreign Language students in hypertext reading environment. Their perceived preferred practices were elicited through a questionnaire and interviews, while actual observed online behaviours were recorded with Camtasia Studio 7. Based on these data sources, patterns of reading hypermedia texts on an online reading platform were identified and compared using NVivo 9. The findings indicated that the students’ perceived as well as their preferred learning styles and metacognitive reading strategies were mostly not performed or applied by them when they were engaged in the actual hypermedia reading environment. These differences in behaviours were contributed to the reading tasks and hypermedia tools made available by the platform facilitating their reading processes. Most significantly, the study revealed that the types of hypermedia tool available enabled them to modify their previously preferred practices for other ways of reading and comprehending the hypermedia texts. Moreover, the findings have also implied that students reading hypermedia texts online can develop different choices of sensory pathways unique to digital literacy environments. Thus the findings are significant as they contribute towards the currently limited knowledge about electronic literacy and online reading processes.
The effects of increased non-work time on the energy intensity of consumption

This thesis investigates how the energy intensity of consumption is affected by an increase in non-work time by estimating how retirement affects the consumption of gasoline and air travel. An estimable model is derived from Becker's (1965) theory of time allocation which is then estimated for a sample of 58-68 year old full-time workers and retired individuals that is taken from the 2014 Consumer Expenditure Survey made by the Bureau of Labor Statistics. Together with the estimation of a secondary model, it is found that retirement increases total energy intensity of consumption through an increase in airfare expenditure together with a slight decrease in gasoline expenditure. A simple test for extrapolation further suggests that extrapolation of the results for the whole working population might be possible.
EXPLORING THE FEASIBILITY OF A SEPARATED FUNCTION RFQ STRUCTURE

The accelerating field in the conventional RFQ is originated by the surface modulation of the quadrupole electrodes. However, the axial accelerating field generated in this way is quite limited. To enhance the energy gain, an alternative structure called Separated Function RFQ (SFRFQ) was proposed, and the feasibility of which is being explored. The RF accelerating field in the SFRFQ structure mainly occurs at gaps between periodical cells, while the electrical quadrupole field inside the cells provides the transverse focusing. Two kinds of structures, namely SFRFQ with diaphragms and with mini-vane gaps, have been studied. It turns out that the energy gain can be improved considerably, comparing with that of conventional one. All the preliminary results of calculation and measurements are presented and discussed in the paper.
Frequency Reconfigurable Circular Patch Antenna with an Arc-Shaped Slot Ground Controlled by PIN Diodes

In this paper, a compact frequency reconfigurable circular patch antenna with an arc-shaped slot loaded in the ground layer is proposed for multiband wireless communication applications. By controlling the ON/OFF states of the five PIN diodes mounted on the arc-shaped slot, the effective length of the arc-shaped slot and the effective length of antennas current are changed, and accordingly six-frequency band reconfiguration can be achieved. The simulated and measured results show that the antenna can operate from 1.82 GHz to 2.46 GHz, which is located in DCS1800 (1.71–1.88 GHz), UMTS (2.11–2.20 GHz), WiBro (2.3–2.4 GHz), and Bluetooth (2.4–2.48 GHz) frequency bands and so forth. Compared to the common rectangular slot circular patch antenna, the proposed arc-shaped slot circular patch antenna not only has a better rotational symmetry with the circular patch and substrate but also has more compact size. For the given operating frequency at 1.82 GHz, over 55% area reduction is achieved in this design with respect to the common design with rectangular slot. Since the promising frequency reconfiguration, this antenna may have potential applications in modern multiband and multifunctional mobile communication systems.
On the reliability and stability of direct explicit Runge-Kutta integrators

Recently, efficient direct numerical integrators of Runge-Kutta type (called RKD and RKT methods) for solving third-order ordinary differential equations (ODEs) of the form y ′′′ = f (x, y) have been proposed. In this paper, we investigate the reliability of these RKD and RKT approaches, with focus on their stability and accuracy. We compare the stability regions of RKD and RKT methods. It is found that RKD stability region is adaptable, in the sense that its area can be controlled using a free parameter to get a more stable solution. To test the accuracy of RKD, we present some examples of this approach towards solving third-order ordinary differential equations. Simulation results show that the RKD approach, in addition to outperforming the existing RKT methods in terms of accuracy and time consumption, gives better control over stability region. AMS subject classification:
Wave Equation Versus Kirchhoff Prestack Depth Migration of OBC Data

In areas with complex velocity models, wave equation depth migration has been shown to give significantly better results than the industry standard Kirchhoff depth migration. For very simple velocity models, on the other hand, Kirchhoff depth migration is expected to give similar results as wave equation algorithms. In this paper, we compare Kirchhoff and wave equation prestack depth migration using an ocean bottom cable (OBC) data set from a North Sea area with a velocity model of intermediate complexity. The wave equation depth migration gives better resolution than the Kirchhoff method, but the wave equation algorithm seems not to image the steeply dipping part of the reflectors at large depths as well as the Kirchhoff depth migration. However, this can be an artificial result due to the blurring introduced by the Kirchhoff method.
MICRO-DEFORMATION MONITORING OF ACTIVE TECTONIC STRUCTURES IN W SLOVENIA

Monitoring of tectonic movements along three active faults of Dinaric (NW-SE trending) fault system in W Slovenia using TM 71 extensiometers was set up in 2004. After two and a half years of measurements clear trends of displacement were recorded. The average left-lateral displacement along a crack in the inner fault zone of the Idrija fault in Ucja valley was reading 0.38 mm/year. Short term (10 months) rates were even greater and reached the value of 0.54 mm/year. Since the Idrija fault is considered generally to be dextral strike-slipping, the observed left-lateral displacement can be explained by variations in principle stress. Rasa fault monitoring site at the foot of Vremscica Mt. established an average reverse uplift of hanging wall (SW) block of 0.24 mm/year and left-lateral displacement of 0.16 mm/year. Short term (9 months) vertical displacements reached the value of 0.53 mm/year. The inclined displacement is in agreement with geological and seismological observations. In the Postojna cave system two instruments were installed at the fault which extends parallely to Predjama fault zone. The average vertical displacement rate at Postojna 1 site was 0.01 mm/year. Both devices recorded similar reaction which can be attributed to 12 July, 2004 (Mw=5.2) earthquake with an epicentre 70 km away from the measuring site. Since there were no other stronger earthquakes in the vicinity and time span of monitoring, no other correlations were established with earthquake activity. The observed displacement rates along all three monitored faults of up to 0.5 mm/year are consistent with the regional deformation rate in W Slovenia established from GPS measurements which is of the order of 2 mm/year.
Magnetometry of single ferromagnetic nanoparticles using magneto-optical indicator films with spatial amplification

We present a magneto-optical technique to spatially amplify and image fringe fields from single ferromagnetic nanorods. The fringe fields nucleate magnetic domains in a low-coercivity, perpendicularly magnetized indicator film, which are expanded by an applied out-of-plane field from the nanoscale to the microscale for measurement with polar Kerr microscopy. The nucleation location and therefore magnetic orientation of the sample nanorod are detected as spatially dependent field biases in locally measured hysteresis loops of the indicator film. We first discuss our method to fabricate the high-sensitivity indicator film with low energy argon ion irradiation. We then present a map of the amplified signal produced from a single nanorod as measured by the indicator film and compare it with a simultaneously obtained, unamplified fringe field map. The comparison demonstrates the advantage of the amplification mechanism and the capability of the technique to be performed with single-spot magneto-optical Kerr ef.
Relations Between Goal Orientations, Academic And Teacher Self Efficacy In Predicting Achievement

The fundamental aims of education are learning and achievement. In education, students are expected to learn the academic content and demonstrate an acceptable level of performance. In this respect, motivation is a crucial factor on academic performance and learning of students. Recent theories on academic motivation are based on cognitive aspects compared to drive or reinforcement based earlier explanations. The aim of the study was to investigate the relationships between goal orientations, academic self-efficacy, and teacher sense of efficacy and the predictive roles of these variables on preservice teachers’ academic achievement. The participants of the study were 636 pre-service teachers from the Elementary Mathematics Education, Social Science Education, Primary Education and Foreign Language Education Departments at Istanbul University. The sample was composed of 352 males and 275 females. Eleven participants provided no gender information. In the data collection phase, 2X2 Goal Orientations Scale (Akın, 2006), Academic Self-efficacy Scale (Owen & Froman, 1988) and Teacher Self-efficacy Scale (Tschannen-Moran & Woolfolk-Hoy, 2001) were used. In the quantitative analysis, significant relations were identified between the goal orientations, academic self-efficacy and teacher self-efficacy of pre-service teachers. The regression analysis demonstrated that pre-service teachers goal orientations, academic self-efficacy and teacher sense of efficacy had predictive roles on their academic achievement. © 2017 Published by Future Academy www.FutureAcademy. org.uk
Data Mining in the Molecular Biology Era A Study Directed to Carbohydrates Biosynthesis and Accumulation in Plants

The last revolutionary advance in biological research was driven by the concepts of molecular biology, which links information about genetic traits to DNA and proteins (Katagiri, 2003). The central dogma of molecular biology is that information stored in DNA is processed through RNA to produce proteins that execute various cellular functions. At the basic hierarchical level, information flow is from the genes, to mRNA, and proteins. The current adopted approaches are based in the attribution of the biological phenomena to the actions of one or a few genes. Unfortunately with these approaches it is difficult to reconstitute a model for a whole biological system by simple combining the information they generate. Recently, ideas about linear flow of information have been revised to permit the development of a more integrated view of cellular functions as being distributed among groups of elements that all interact within large networks. Over the last years, there has been an explosion of information in biology. The sequencing of more than a hundred genomes has detailed thousands of genes. High-throughput technologies, especially DNA arrays, generate information about the expression of these genes under different conditions (Ideker et al, 2001). The next step towards a more comprehensive understanding of the biological system is to integrate these data into a conceptual framework. The ultimate goal is to understand biological systems in sufficient detail to enable accurate and quantitative predictions about the behaviors of biological systems, including predictions of the effects of modifications of the system (Katagiri, 2003). Systems biology applies the methods of biology, mathematics, computer science, engineering, and physics to understanding living systems. Developing accurate predictive methods capable of scaling from genotype to phenotype can be approached through systems biology coupled with genomics and gene expression data (Fig. 1). The way to build bridges from molecular biology to physiology is to recognize that a network of interacting genes and proteins is a dynamic system evolving in space and time according to laws of reaction, diffusion and transport (Tyson, 2007). A system can be generally defined as a network of interacting elements receiving certain inputs and producing certain outputs. Quantitative models are generated as tools to aid understanding and prediction of system output in response to the environment and system inputs. Models are simplified representations of system dynamics, usually in mathematical O pe n A cc es s D at ab as e w w w . in te ch w eb . o rg
How Cost, Complexity and Technological Opportunity Affect the Rate of Patenting

We investigate determinants of patenting, focusing on effects of costs, complexity of technology and technological opportunity. In a theoretical model of patenting it is shown that in complex technologies greater technological opportunity reduces firms’ incentives to patent while greater complexity of technology increases patenting incentives. In contrast firms’ patenting incentives rise in discrete technolo gies as technological opportunity increases. Using European patent data a new measure of technological complexity is derived from patent citations. It is shown that patenting conf orms to our theoretical model. The theoretical predictions are tested in a panel which allows us to study patenting behaviour of 2074 firms in 30 technology areas over 15 years. Res ults from GMM estimation indicate that patent thickets exist in 10 of these areas and have important effects on patenting behaviour.
El Cuestionario de Salud SF-36 español: una década de experiencia y nuevos desarrollos

Objetivo: El Cuestionario SF-36 es uno de los instrumentos de Calidad de Vida Relacionada con la Salud (CVRS) mas utilizados y evaluados. Tras una decada de uso este articulo revisa criticamente el contenido, propiedades metricas y nuevos desarrollos de la version espanola. Metodos: Revision de los articulos indizados en Medline (PubMed) y en las bases de datos IBECS e IME que han utilizado la version espanola del cuestionario. Se seleccionaron los articulos con informacion sobre modelo de medida, fiabilidad, validez y sensibilidad al cambio del instrumento. Resultados: Se encontraron 79 articulos, 17 de los cuales describian caracteristicas metricas del cuestionario. En el 96% las escalas superaron el estandar propuesto de fiabilidad (α de Cronbach) de 0,7. Las estimaciones agrupadas obtenidas por metaanalisis fueron superiores a 0,7 en todos los casos. El SF-36 mostro buena discriminacion entre grupos de gravedad, correlacion moderada con indicadores clinicos y alta con otros instrumentos de CVRS. El SF-36 predijo mortalidad y detecto mejoria tras la angioplastia coronaria, la cirugia de hipertrofia prostatica benigna o la ventilacion domiciliaria no invasiva. Los nuevos desarrollos descritos (puntuaciones basadas en normas, la version 2, el SF-12 y el SF-8) mejoraron sus propiedades metricas y su interpretacion. Conclusiones: El SF-36, conjuntamente con las nuevas versiones desarrolladas, es un instrumento muy adecuado para su uso en investigacion y en la practica clinica.
Layer performance, fatty acid profile and the quality of eggs from hens supplemented with Moringa oleifera whole seed meal

The objective of the study was to determine how the partial supplementation of Moringa oleifera whole seed meal (MOWSM) would affect layer performance, egg quality and egg fatty acid profile. One hundred and forty-four Hy-Line hens in early-lay (20-weeks-old), with an average body weight of 1.45 kg were randomly allocated to four dietary treatments which were formulated to meet or exceed the National Research Council standards for brown-egg laying hens. Dietary treatments consisted of 0 (control), 1, 3, and 5% MOWSM. Layer performance was monitored over a period of 8 weeks. The inclusion of MOWSM in layer diets reduced feed intake, bodyweight, the rate of lay, egg weight, and egg mass. Yolk colour was significantly improved by 1, 3 and 5% inclusion levels, while the albumen height decreased. The albumen weight, yolk weight, eggshell weight, eggshell thickness, and egg shape index showed no statistical differences across all treatment groups. Similarly, the saturated fatty acid profile was also not affected. Palmitoleic acid decreased with the increase in MOWSM inclusion, whilst linolelaidic acid increased. The atherogenicity index was not affected by MOWSM inclusion, while the thrombogenicity index increased when compared to the control diet. It was concluded that, although MOWSM inclusion improved yolk colour, maintained external egg quality, and improved the fatty acid profile, the deleterious effect that it had on layer performance indicated that it may not be fed to early-lay hens at these respective levels. Keywords: Alternative protein, egg production, laying hens, oil seeds