Miracle-dz/UniFAR-FTUs huggingface dataset:
Fractal analysis of the multifractality of foreign exchange rates

The multifractional model with random exponent (MPRE) is one of the most recent fractional models which extend the fractional Brownian motion (fBm). This paper is an empirical contribution to the justification of the MPRE. Working with several FX rates between 2006 and 2016, sampled every minute, we show the statistical significance of various fractional models applied to log-prices, from the fBm to the MPRE. We propose a method to extract realized Hurst exponents from log-prices. This provides us with a series of Hurst exponents on which we can estimate different models of dynamics. In the MPRE framework, the data justify using a fractional model for the dynamic of the Hurst exponent. We estimate and interpret the value of the key parameter of this model of nested fractality, which is the Hurst exponent of the Hurst exponents.
Methadone in Irish general practice : voices of service users

This study sets out to make a meaningful and useful contribution to the discussion surrounding the treatment of heroin addiction in the Republic of Ireland. The exploration describes the experiences of service users who are receiving methadone treatment in general practice in Dublin and provides recommendations for practice. A Husserlian phenomenological approach drawing on the psychological research methods of Colazzi informed this study. This qualitative descriptive genre was coupled with the genre of reflexive methodology and utilised the techniques of bracketing interviews and polyvocality. The study took place in nine urban general practices in Dublin city. Twenty five service users were interviewed indepth. The data were analyzed using the methodology espoused by Collazzi (1978). Four themes emerged from the data: Service users’ experience of attending general practice for methadone maintenance; The significance of methadone for the service user; Service users’ understanding of the Methadone Treatment Protocol and The experience of addiction and it’s effect on families. Service users’ accounts traced the historical steps that influenced the introduction of the MTP. Their depictions of their experience of treatment shed light on the process of care in general practice and how clinical guidelines have been interpreted and developed locally. The study identified what it is that affects the delivery of methadone treatment from the users’ perspective. It provides insight into the harm reduction policy of methadone maintenance and highlights how, from the service users’ own experience, the implementation is falling short. The data identify that the delivery of methadone treatment requires a sustained policy review, informed by a clinical perspective on all issues related to regulations, practice guidelines, and treatment resourcing. The recommendations suggest that to be truly effective, strategies which recognize the importance of user involvement need to be addressed.
Influence of fiber diameter on filtration performance of polyester fibers

The filtration performance of four kinds of coarse polyester filters commonly used in the market was studied experimentally. The results showed that these filter materials had better filtration efficiency for particles larger than 5 ? m. There was a significant difference among the same grade filters on filtration efficiency and resistance. The maximum counting efficiency of all four Samples can be achieved when the filtration velocity was 1.1 m/s. Fiber diameter was one of the main influencing factors that affect the efficiency and resistance of polyester filters. The comprehensive effect was relatively good when the Sample fiber diameter was small.
Large Eddy Simulations of the Flow Fields over Simplified Hills with Different Roughness Conditions, Slopes, and Hill Shapes: A Systematical Study

Turbulent flow fields over topographies are important in the area of wind energy. The roughness, slope, and shape of a hill are important parameters affecting the flow fields over topographies. However, these effects are always examined separately. The systematic investigations of these effects are limited, the coupling between these effects is still unrevealed, and the turbulence structures as a function of these effects are still unclear. Therefore, in the present study, the flow fields over twelve simplified isolated hills with different roughness conditions, slopes, and hill shapes are examined using large eddy simulations. The mean velocities, velocity fluctuations, fractional speed-up ratios, and visualizations of the turbulent flow fields are presented. It is found that as the hill slope increases, the roughness effects become weaker, and the roughness effects will further weaken as the hill changes from 3D to 2D. In addition, the fractional speed-up ratio at the summit of rough hills can even reach to three times as large as that over the corresponding smooth hills. Furthermore, the underestimation of the ratios of spanwise fluctuation to the streamwise fluctuation by International Electrotechnical Commission (IEC) 61400-1 is quite obvious when the hill shape is 3D. Finally, coherent turbulence structures can be identified for smooth hills, and as the hill slope increases, the coherent turbulence structures will experience clear evolutions. After introducing the ground roughness, the coherent turbulence structures break into small eddies.
Digital adiabatic passage in multi-state systems

Digital adiabatic passage in multi-pod and multi-lambda systems is investigated. We show that using digital variation of control fields, one can create a coherent superposition of ground states in multi-state systems. In order to design the propagator at every step, the multi-state systems are simplified to a three-state system using Morris-Shore transformation. In this method, the number of steps is arbitrary and by increasing the number of steps the population of excited states decreases to negligible small values. Sensitivity of the final fidelity with respect to exact value of tmax decreases by increasing the number of steps.
System analysis for technology transfer readiness assessment of horticultural postharvest

Availability of postharvest technology is becoming abundant, but only a few technologies are applicable and useful to a wider community purposes. Based on this problem it requires a significant readiness level of transfer technology approach. This system is reliable to access readiness a technology with level, from 1-9 and to minimize time of transfer technology in every level, time required technology from the selection process can be minimum. Problem was solved by using Relief method to determine ranking by weighting feasible criteria on postharvest technology in each level and PERT (Program Evaluation Review Technique) to schedule. The results from ranking process of post-harvest technology in the field of horticulture is able to pass level 7. That, technology can be developed to increase into pilot scale and minimize time required for technological readiness on PERT with optimistic time of 7,9 years. Readiness level 9 shows that technology has been tested on the actual conditions also tied with estimated production price compared to competitors. This system can be used to determine readiness of technology innovation that is derived from agricultural raw materials and passes certain stages.
Off School, In Court: An Experimental and Psychiatric Investigation of Severe School Attendance Problems

This book is concerned with an investigation of severe school attendance problems. The purpose of this study is to integrate and synthesize related research carried out over the last ten years on this important social problem. The research describes the first use of randomly controlled trials by the courts in Great Britain and the psychiatric assessment of a non-clinical population of poor attenders. The approach provides new and interesting data and a good methodological example of the use of randomized experiments by the courts.
A Broadband P-Shaped Circularly Polarized Monopole Antenna With a Single Parasitic Strip

A new broadband circular polarization (CP) monopole antenna with simple structure is proposed. The antenna consists of a P-shaped monopole and modified ground plane with rectangular stub, and results demonstrated that the 10 dB impedance bandwidth (ZBW) is 118.5% (1.6–6.25 GHz) and the 3 dB axial-ratio bandwidth (ARBW) is 104.4% (1.9–6.05 GHz). Procedures to improve the proposed antenna design and the CP mechanism analysis were performed. The performance of different parameters is presented. The advantages of the proposed antenna are broader ZBW and ARBW, simpler structure, and compact size.
A Palaeogravity calculation based on weight and mass estimates of Ankylosaurus magniventris.

The specimen chosen for this study of palaeogravity was the quadrupedal armoured dinosaur Ankylosaurus magniventris AMNH 5214. 1 See for example: Harlé (1911), Kort (1947), Pennycuick (1992, 2008, 2016), Hurrell (1994, 2011, 2012, 2014a, 2014b, 2018, 2019a, 2019b, 2019c, 2019d), Carey (2000), Mardfar (2000, 2012, 2016), Erickson (2001), Sato et al (2009), Scalera (2003a, 2003b), Strutinski (2012, 2016a, 2016b), and Maxlow (2014). Abstract
Reuse of iron ore tailings in the production of geopolymer mortars

A great variety of silica and alumina-rich materials have been investigated in the production of alkaline activated binders (or geopolymers) with low environment impact, e.g. low CO2 emissions. Geopolymer mortars and concretes may be more environmentally friendly if not only Portland cement but also natural aggregates (sand, gravel) are replaced with waste materials. This article presents results of geopolymers made with tailings from the iron mining industry. The geopolymer matrices are composed of metakaolin (MK) activated with a sodium silicate + sodium hydroxide solution. Two different iron ore tailings replaced a natural quartz aggregate in the geopolymers’ formulation. The hardened properties assessed were compressive strength, water absorption, apparent density and porosity. Scanning electron microscopy (SEM) and x-ray micro computed tomography (μ-CT) were used to assess the changes in the microstructure when the tailings were incorporated into the geopolymers. Results show that the employment of iron ore tailings is not detrimental to the mechanical strength of geopolymers; however, geopolymers containing those alternative aggregates may present higher water absorption and porosity, and durability studies are required.
Implementing constructivism in the middle school classroom

This study defines the components of a middle school history curriculum based on a theory of learning consistent with the use of cognitive tools and the tenets of constructivism. Utilizing a comparative analysis of learning theories encompassing developmental and constructivist beliefs and their influence on appropriate instructional design, the research addresses the necessary pairing of instructional planning and learning theory. Additionally, an examination of linguistic tools and their relationship to cultural development and distinctive kinds of comprehension, as well as specifics of the various learning stages, preferences, and skills are used to provide a rationale. This analysis is employed in the development of a middle school history/social studies curriculum premised upon the ideology that students employ intellectual tools at different stages of maturation that support specific types of understanding. The resulting instructional design for students, grade six through eight, contains the fundamental elements of constructivism, how these elements manifest themselves in a curriculum, appropriate activities, projects, and methods for evaluation. The study concludes in a discussion concerning the implications of coupling constructivist theory with linguistic strengths, and the impact this union has on curriculum design.
Gender Inequalities in Early Career Trajectories and Parental Leaves: Evidence from a Nordic Welfare State

Parental leaves are, besides unemployment, the main reason for career breaks in early career. Despite the progress in recent decades towards more equal sharing of childcare between mothers and fathers, the labour market risk due to parenting remains mainly with women. In this article, we analyse how parental leaves relate to early career trajectories of young Finnish men and women. Using longitudinal register data for 2005–2016 from the Finnish Centre for Pensions, we perform a multi-trajectory analysis of the labour market attachment of a cohort born in 1980. Based on working days and earnings, we find five distinct career trajectories for both men and women, with the majority being well attached to the labour market by their mid-30s. While men and women on average have similar employment lengths, the gender gap in earnings is already 30 per cent in this early career phase. One of the causes may be found in the highly unequal division of family-related career breaks; the duration of mothers’ family-related leaves in this cohort was 13 times longer than fathers’ leave spells. Long home care leaves were particularly common among mothers with low education levels and weak attachment to the labour market. Efforts towards a more equal division of parental leaves are needed in order to combat gender inequalities that already emerge in early career and potentially cause life-long disadvantages for women’s careers, earnings and pensions.
Compact high‐selectivity tunable dual‐mode filter with constant bandwidth by adopting frequency‐dependent S‐L coupling

A compact high‐selectivity tunable dual‐mode microstrip bandpass filter (BPF) with constant bandwidth is proposed in this letter. Three self‐adaptive transmission zeros (TZs) are generated due to the frequency‐dependent source‐load (S‐L) coupling and intrinsic characteristic of dual‐mode resonator, which can sharpen the skirt and deepen the upper stopband. The passband performance can be mainly determined by the pole separation Δf of dual‐mode and external quality factor Qe. Finally, a tunable filter with tuning range from 1.15 to 1.65GHz, constant 3 dB absolute bandwidth (ABW3dB) of 120 ± 5 MHz is designed and fabricated. The measurement results show good agreement with simulated ones, which confirms the design feasibility.
Improved Collaborative Control of Standalone Brushless Doubly Fed Induction Generator Under Unbalanced and Nonlinear Loads Considering Voltage Rating of Converters

In standalone brushless doubly-fed induction generator (BDFIG) power generation systems, unbalanced and nonlinear loads can produce distorted power winding (PW) voltage, and consequently affects the normal operation of other loads and degrades the performance of the power generation system. Although the negative-sequence and harmonic components of the PW voltage can be eliminated by the conventional control methods implemented in either machine-side converter (MSC) or load-side converter (LSC), it causes higher voltage rating of converters and needs more current sensors. In this article, the detailed analysis for the impact of conventional control methods on the voltage rating of the two converters is presented. And then, an improved collaborative control method considering the power converter voltage rating is proposed, in which the MSC can be employed to eliminate the seventh-harmonic voltage of PW, and the LSC can be used to reject the negative-sequence and fifth-harmonic components of PW voltage without extra current sensors. The proportional-integral-resonant controller is applied to the current control loops in both MSC and LSC so as to obtain good current track ability. Comprehensive experimental results based on a 30-kVA BDFIG demonstrate the effectiveness of the proposed method.
Self-efficacy and subjective task values in relation to choice, effort, persistence, and continuation in engineering: an Expectancy-value theory perspective

ABSTRACT Guided by Expectancy Value Theory (EVT), we investigated the association of students’ engineering self-efficacy and subjective task values (attainment, intrinsic, utility and cost) to four achievement-related behaviours: choice to take more engineering courses, effort in academic tasks, persistence to complete engineering tasks in the face of difficulties, and continuation in the field of engineering. Participants included 163 engineering college students from a large southern metropolitan university in the United States. Bivariate correlations and multiple hierarchical regressions were conducted to examine the relationships among variables. Results showed that engineering self-efficacy and subjective task values (except cost) were positively associated with achievement behaviours respectively. However, once the set of subjective task values were entered in the regression models, self-efficacy did not explain significant unique variance for any of the achievement-related behaviours. Intrinsic interest emerged as the most consistent predictor of achievement-related behaviours when controlling for self-efficacy and the other four task value dimensions.
Contemporary Health Promotion in Nursing Practice

In Contemporary Health Promotion in Nursing Practice, Bonnie Raingruber describes why nurses are positioned to model healthy behavior to the general public, and how they can promote health to their clients and community. This text emphasizes the nurse's role in health promotion, and illustrates how healthy behaviors, like weight management, positive dietary changes, smoking cessation, and exercise, are more likely to be adopted by clients if nurses adopt these same behaviors. This is the most up-to-date health promotion text available, and includes detailed sections on: * Innovations, regulations, and policies developed in recent years that changed health promotion practice * Health disparities * Health literacy * Alternative and complementary healing * Effective methods of promoting health and increasing client adherence to healthy behaviors * Standardized ways of evaluating health promotion interventions * Entrepreneurship * Information technology and nursing informatics * How to use the arts and literature to promote health
Productivity Evaluation of Coalbed Methane Well with Geophysical Logging-Derived Tectonically Deformed Coal

Tectonically deformed coal (TDC) has a significant influence on coalbed methane recovery. Well-logging is a reliable and efficient way to predict the development of TDCs for understanding the role of TDC on the productivity of coalbed methane (CBM) wells. However, there has been insufficient research regarding both the static physical properties and dynamic invasion of mud-filtrate related to TDCs. Therefore, a new TDC-detecting approach using two indicators of the relative physical properties and fluid attributes was proposed. Through the data normalization and optimization of correlation coefficients and factor analysis, five logs were chosen to construct the two indicators, and three types of TDC were recognized: I—undeformed or cataclastic; II—granulated; and III—mylonitized. It was found out that the identification error rate decreased from 30% to 15%. Furthermore, the thickness ratio of a well-preserved coal layer derived from TDC interpretation was adopted to correlate the gas production of a coal seam. An application in the Hancheng block demonstrated that the thickness ratio of 60% is an explicit threshold value to distinguish between high-yield well (>1000 m3/d) and low-yield one (<750 m3/d). The development of granulated and mylonitized coals mainly exerts negative influence on CBM well production.
A Modified Asymmetrical Half-Bridge Flyback Converter for Step-Down AC–DC Applications

This article presents a modified asymmetrical half-bridge flyback converter (AHBFC) to fulfill the single-stage step-down ac–dc universal input voltage application. This topology is obtained from the integration of a buck-type power factor correction, an auxiliary energy buffer, and a conventional AHBFC. By sharing common switches and utilizing transformer's leakage inductor, the single-stage circuit can achieve both high power factor (PF) and low total harmonic distortion with the simple constant on-time control while regulating the dc output voltage. In addition, it is able to operate in universal input voltage with low dc link voltage and low output voltage. Moreover, the zero voltage switching and the zero current switching features of the power switches can also be achieved. Detailed analyses and design procedures of the proposed converter are given and verified by the experimental results. Finally, the comparison with reported circuit topologies and power loss analyses verified by experimental results are presented to provide the insight of practical design.
Multiple Line-Outage Detection in Power System With Load Stochastic Perturbations

In this brief, we consider multiple line-outage detection problem based on dynamic model of the power system subjects to load stochastic perturbations. A novel detection algorithm is proposed using data obtained from phase measurement units (PMUs). In order to reduce the computation burden, the algorithm is further improved by means of introducing the original topology of power system. Moreover, we propose a predictive algorithm to solve the sampling interval problem of data acquisition. Finally, simulation results are given to demonstrate the applicability of the proposed algorithm.
Mobile apps application to improve safety and health knowledge, attitude and practice among university students

Introduction: The application of M-learning or mobile application (app) as a tool to disseminate occupational safety and health (OSH) information among students and staff in the university, to replace the use of conventional noticeboard was assessed in this study. Materials and Methods: Study was conducted between February to March 2016 and involved 124 respondents from health sciences program in Universiti Putra Malaysia. OSH information was incorporated into a mobile-app using online software and respondents were requested to use the app for fourteen days. A self-administered questionnaire was used to assess the level of knowledge, attitude and practice of respondents before and after using the app. Results: The mobile app has significantly increased the knowledge score among respondents (z =-7.331, p<0.001). The mean (SD) of knowledge score has increased from 24.39 (5.84) to 30.40 (4.97). The attitude score also has significantly increased from 12.85 (2.04) to 14.02 (2.42) (z=-4.587, p<0.001). The mobile app was not significantly changed the practice (z=-0.688, p=0.491) and the perception among respondents (z=-0.337, p=0.736). Respondents stated that the app was user-friendly (49.4%, N=61), easy to access (N= 64, 51.6%), and have interesting contents (N= 63, 50.8%). They believed continuous used of the app may improve their knowledge (N= 64, 51.6%), and increase their awareness (N= 67, 54.0%) on safety and health. Conclusion: The M-learning (mobile app) has a potential to be used to promote the safety and health culture among students on the campus. © 2018 Faculty of Medicine and Health Sciences. All rights reserved.