bluuebunny/crossref_metadata_2025_split huggingface dataset:
Local order parameters for symmetry fractionalization
Authors: Garre-Rubio José , Iblisdir Sofyan 
Published: October 2019

Abstract
We propose a family of order parameters to detect the symmetry fractionalization class of anyons in 2D topological phases. This fractionalization class accounts for the projective, as opposed to linear, representations of the symmetry group on the anyons. We focus on quantum double models on a lattice enriched with an internal symmetry in the framework of G-isometric projected entangled pair states. Unlike previous schemes based on reductions to effective 1D systems (dimensional compactification), the order parameters presented here can be probed on genuinely two-dimensional geometries, and are local: they rely on operations on few neighbouring particles in the bulk. The power of these order parameters is illustrated with several combinations of topological content and symmetry. We demonstrate that a strictly finer phase distinction than that provided by dimensional compactification can be obtained. As particular examples, the resolution power of these order parameters is illustrated for a case with non-abelian topological order, and for another with symmetries that involves permutation of anyons.
DRG microstimulation evokes postural responses in awake, standing felines
Authors: King Kevin W , Cusack William F , Nanivadekar Ameya C , Ayers Christopher A , Urbin M A , Gaunt Robert A , Fisher Lee E , Weber Douglas J 
Published: October 2019

Abstract

Objective. We have demonstrated previously that microstimulation in the dorsal root ganglia (DRG) can selectively evoke activity in primary afferent neurons in anesthetized cats. This study describes the results of experiments focused on characterizing the postural effects of DRG microstimulation in awake cats during quiet standing. Approach. To understand the parameters of stimulation that can affect these postural shifts, we measured changes in ground reaction forces (GRF) while varying stimulation location and amplitude. Four animals were chronically implanted at the L6 and L7 DRG with penetrating multichannel microelectrode arrays. During each week of testing, we identified electrode channels that recruited primary afferent neurons with fast (80–120 m s−1) and medium (30–75 m s−1) conduction velocities, and selected one channel to deliver current-controlled biphasic stimulation trains during quiet standing. Main results. Postural responses were identified by changes in GRFs and were characterized based on their magnitude and latency. During DRG microstimulation, animals did not exhibit obvious signs of distress or discomfort, which could be indicative of pain or aversion to a noxious sensation. Across 56 total weeks, 13 electrode channels evoked behavioral responses, as detected by a significant change in GRF. Stimulation amplitude modulated the magnitude of the GRF responses for these 13 channels (p   <  0.001). It was not possible to predict whether or not an electrode would drive a behavioral response based on information including conduction velocity, recruitment threshold, or the DRG in which it resided. Significance. The distinct and repeatable effects on the postural response to low amplitude (<40 µA) DRG microstimulation support that this technique may be an effective way to restore somatosensory feedback after neurological injuries such as amputation.
Construct validity of attitudes towards mathematics questionnaire
Authors: Srikoon S , Thonjeang P 
Published: October 2019

Abstract
One goal of basic education in mathematics is to help students develop an attitudes towards mathematics. The purpose of this research was to validate of the attitudes towards mathematics questionnaire. Sample are 204 students for validating an attitudes towards mathematics questionnaire. The attitudes towards mathematics consists of the 14 items for self-assessment. Confirmatory factor analysis was used to confirm the construct validity. The results confirmed that the construct validity of these test an excellent fit. The results show that the fitness index of validating attitudes towards mathematics questionnaire were as follow: statistic of 68.77 (degrees of freedom = 53, p = 0.071), and the χ 2/df ratio having a value of 1.30 indicates a good fit. The comparative fit index (CFI) is 0.979, and Tucker-Lewis coefficient (TLI) is 0.964, Root mean square error approximation (RMSEA) is 0.028, Standardized Root Mean Residual (SRMR) is 0.030. All the indicators indicated that were a goodness of fit between the empirical data and the hypothetical measurement model.
Effect of 5P model on mathematics achievement and mood
Authors: Srikoon S 
Published: October 2019

Abstract
This study examined significant changes on the mathematics achievement and mood of Grade 9 students after the intervention of the 5P model and 5E model with an experimental group and control group, respectively. The 5P model is an integrated between educational neuroscience and research-based learning. In total, 77 out of 411 Grade 9 students were purposively selected from high school located in Buriram province, Thailand. The sample comprised of 38 students of the experimental group and 39 students of the control group for randomized pretest-posttest control group design. One-way analysis of variance is utilized for analysis of variance. The findings revealed that the effect of 5P model was found be greater compared to the 5E model.
The teacher’s competence of integrated teaching at primary school science
Authors: Hieu Le Trung , Nam Nguyen Danh 
Published: October 2019

Abstract
The paper presents some research results on primary teachers’ competence on integrated teaching in Vietnam. We have conducted a survey with teachers and educational managers in the context of renewing general education curriculum and texbooks as well as new teacher’s professional standards. The research results have shown that most of respondents agreed with our proposed competencies for integrating teaching and their basic components. Based on these components, we have described indicators for each capacity and suggested some measures to design continuous professional development for primary teachers so that they could meet the requirements of general education renovation.
STEM education Project-Based Learning Activities impacting on teamwork skills and Satisfaction of grade 11 Students in Khon Kaen Wittayayon School.
Authors: Satchakett Nakin , Thana Aduldej 
Published: October 2019

Abstract
This research aims to 1) To study the teamwork skills of the students 2) To study the effects of the project STEM education-based learning activities on the students’ satisfaction. The target group was the Glade 11 students of Khon Kaen Wittayayon School. The study was conducted in the first semester of the academic year 2017. The 92 students were selected by purposive sampling. Research instruments included 9 lesson plans STEM approach, Teamwork assessment and satisfaction questionnaire. The result found that 1. The ability of teamwork skills of students who have been provided with the project STEM education-based learning activities was found that to Level 4 include 1) Listening to the opinions of others (125 points) Collaboration (122 points) and the reflection of their knowledge (122 points) all that means the students are attentive Listen to the proposals and ideas of the group members before presenting their ideas. Students can work with other members of the group well and share responsibilities with all team members. Students present or reflect a positive and creative concept. Level 3 include students Participation(116 points) Working behavior (107 points). Level 2 include Leadership (84 points) 2. Satisfaction with project STEM education-based learning activities was high level (4.70 S.D. = 0.2).
The Interpretation of Thai Kindergarten Students’ Making Sense of Speed and Velocity
Authors: Nitayarote Introng , Yuenyong Chokchai 
Published: October 2019

Abstract
This paper aimed to examine some issues of kindergarten students’ learning about Physics. Students’ making sense of speed and velocity will be interpreted. Participants included twenty kindergarten students (4-5 years old) who were studying in Khon Kaen University Kindergarten Demonstration School, Khon Kaen, Thailand. Methodology regarded interpretive paradigm. The goal of kindergarten schools includes development of motor, emotion and mind, social, and cognitive skills. On the way of development of these skills, they may also make sense of science concepts. The students’ making sense of speed and velocity will be interpreted during students’ on activities for development of gross motor skills. Tools of interpretation included participant observation and informal interview when students were participating on the activities for development of gross motor skills as playing with the ball. The activity was carried out for two months. Students’ activities of playing with the ball indicated that some of students made sense of the speed and velocity concept when they showed that they play well on the ball as their perception of the relation of hand, eye, and moving of the ball. It could be mentioned that they not only developed on gross motor skills but also concept of ball moving as speed and velocity. This study may have implications for enhancing kindergarten students to learn science.
Enhance elementary school students to learn mathematics: Case of the use of mother tongue-base language (MTBL) students
Authors: Maminta L G , Mendoza J V , Yuenyong C 
Published: October 2019

Abstract
The study of using Mother Tongue-Based Language (MTBL) in remediation on Least Learned Competencies in Elementary Mathematics to two sections in Grade VI at Tambo Central School was carried out. Both groups were exposed to team-assisted individualized remediation. The data needed for this study were obtained through 30-item achievement test and seventeen (17) Learning Materials constructed by the researcher which were construct-validated and evaluated by mathematics experts. Identified competencies of the materials were based on the National Achievement Test result and in the K to 12 Curriculum on Rational Numbers. The findings of the study revealed that the use of MTBL in team-assisted individualized remediation evidently improved the performance of the respondents in the three competencies on fractions namely comprehension of fractions; multiplication of fractions and its applications; and division of fractions and its applications.
Variable-speed Variable-pitch control for a wind turbine scale model
Authors: Fontanella Alessandro , Taruffi Federico , Bayati Ilmas , Belloli Marco 
Published: October 2019

Abstract
The present work deals with the issues faced by authors in the implementation of a variable-speed variable-pitch (VS-VP) controller on a wind turbine scale model for wind tunnel tests. The PoliMi 1/75 model of the DTU 10MW reference wind turbine (RWT) is presented, focusing on the mechatronic system used to control the machine. The main differences between the PoliMi wind turbine model (WTM) and the DTU 10MW RWT are highlighted out pointing out their influence on the behavior of the controlled machine. Then, the control logic adopted for the PoliMi WTM is introduced. Finally, results from wind tunnel tests on the controlled model are shown and the performance of the closed-loop system is discussed.
Analysis of wake effects on global responses for a floating two-turbine case
Authors: Wise A , Bachynski E E 
Published: October 2019

Abstract
While most existing modeling and analysis of floating wind turbines (FWTs) considers isolated systems, interactions among multiple FWTs arranged in an array have received little attention. In this study, two 10 MW semi-submersible FWTs, separated by 8 rotor diameters (D) in the wind direction, are simulated with an ambient wind speed of 10 m/s and in moderate wave conditions using FAST. Farm to investigate the effects of wakes on global responses. Synthetic inflow is generated using three methods: the Kaimal turbulence model, 1) without and 2) with spatial coherence in the lateral and vertical velocity components, and 3) the Mann turbulence model (where spatial coherence in all three dimensions is inherent to the model). The first method results in negligible wake meandering, a relatively uniform wake deficit, while the second and third methods result in meandering of the upstream turbine’s lateral wake center at the downstream turbine’s rotor plane of up to approximately 1D and 1.5D, respectively. The slow meandering behavior of the upstream turbine’s wake resulted in increased low-frequency platform motions for the downstream turbine. Yaw motions were especially susceptible to wake meandering as the standard deviation of the downstream turbine’s yaw motion increased by 28.0 % for the second method and 11.3 % for the third method. Increased low-frequency response in structural loading was also observed. Wake effects led to between 2 % and 30 % greater fatigue damage at the top of the tower for all three methods and at the base of the tower for the second method. However, other results were found to be sensitive to the blade-passing frequency.
Experimental modal analysis of aeroelastic tailored rotor blades in different boundary conditions
Authors: Gundlach J , Govers Y 
Published: October 2019

Abstract
Bend-twist coupled blades are intended to reduce the loads on the overall wind turbine by passively adapting to current wind conditions. The coupling results from complex-design shapes and structures using advanced finite element models utilising shell and volume elements. These models are however prone to mispredict the structural dynamic behaviour of the rotor blades. In particular, normal modes with both bending and torsion contributions, as well as local vibrations of the blade shells include computational uncertainties. Therefore, in order to update flawed model parameter assumptions, a modal characterisation of blade prototypes including mode shapes is essential. In the present study results of a modal test campaign involving four identical rotor blades of 20 m length with geometric bend-twist coupling are reported. Design, realisation, and post-processing of the experiments have been carried out under careful consideration of a pre-existing FE shell model. Modal data is obtained at two different stages of the manufacturing process and for one blade in two separate boundary conditions, i.e. free-free in elastic suspensions and clamped to a test rig. Due to the high sensor density in both configurations, the identified normal modes do not only include coupled eigenforms but also mode shapes illustrating cross-sectional vibrations; the latter attributed to the deflection of the blade shells. The acquired dataset is found to be well-suited for the validation of the numerical model and represents a reliable basis for updating.
Towards a high-resolution offshore wind Atlas - The Portuguese Case
Authors: Couto A , Silva J , Costa P , Santos D , Simões T , Estanqueiro A 
Published: October 2019

Abstract
An accurate offshore wind resource assessment is a key tool for planning marine wind renewable exploitation. To achieve this goal, without resort to an extensive and costly network of anemometric stations or buoys, it becomes necessary to use the so-called atmospheric mesoscale models. This work presents a high spatial resolution (1x1 km) offshore wind resource Atlas for Portugal and the model calibration steps. During the calibration steps, the most adequate: i) atmospheric parameterizations - physics options, ii) initial and boundary conditions (IBC) meteorological datasets, and iii) data assimilation scheme were achieved through sensitivity tests using the common statistical metrics and hourly simulated/observational data. Results show that the most significant improvements are associated with the IBC dataset and the data assimilation scheme used. Thus, the results show that the assimilation procedures coupled with the new ERA-5 reanalysis dataset reduce significantly the errors of the wind speed and direction, especially the normalized mean square error. This reduction, depending on the different calibration setup, can be above 50%. The new Atlas confirms the previous indicators, Portugal presents a high wind power potential, especially for deep offshore regions.
Characteristics of abnormal vertical wind profiles at a coastal site
Authors: Møller Mathias , Domagalski Piotr , Roar Sætran Lars 
Published: October 2019

Abstract
Phenomena such as internal boundary layers and low-level jets can cause short-term wind fluctuations resulting in the vertical wind profile deviating from its expected logarithmic shape. Analysis of several years of data from the 6 measurement heights on the 100m high coastal Skipheia mast reveals that the 10-minute averaged vertical wind profile deviates from the vertical wind profiles predicted by Monin-Obukhov similarity theory in 30 — 40% of the analyzed instances. Deviations were most commonly present in the form of 1 local maxima, and in more rare instances as 2 local maxima or a completely reversed and monotonically decreasing profile. Analyzing the onshore and offshore directional sectors reveals that offshore winds are less reliant on strong thermal gradients for local maxima to be present, and inflections also occur at higher wind speeds in the offshore sector. Inflections are found to be progressively more common at higher elevations regardless of the direction of incoming wind, and as the found inflection elevations are close to common wind turbine hub heights they represent a potential issue in wind engineering.
High Fidelity Computational Fluid Dynamics Assessment of Wind Tunnel Turbine Test
Authors: Siddiqui M. Salman , Kvamsdal Trond , Rasheed Adil 
Published: October 2019

Abstract
We present, what to our best knowledge, is the most accurate numerical investigation of the wind tunnel tests carried out over a model wind turbine (known as NTNU Blind Test) at the Norwegian University of Sciences and Technology. We show numerical benchmarking of wake measurements against experimental data and similar investigations performed previously by researchers using Computational Fluid Dynamics (CFD) simulations. We have made a full 3D model of the wind turbine and used Sliding Mesh Interface (SMI) approach to handling the rotation of the rotor. The simulations are done with the use of OpenFoam and the k — ω Shear Stress Transport model to resolve turbulence using the Reynolds Average Navier-Strokes (RANS) technique. We present the numerically simulated spatial distribution of the flow field across the wake at zero angles of yaw for horizontal lines downstream of the rotor plane as that was the focus of the NTNU Blind Test presented in [1]
Changes in temperature extremes on the Tibetan Plateau and their attribution
Authors: Yin Hong , Sun Ying , Donat Markus G 
Published: October 2019

Abstract
The Tibetan Plateau (TP) is the largest and highest upland on Earth. Warming on the TP is faster than that in surrounding areas. Evaluating our understanding of the causes behind these changes provides a test of tools used for projections of future climate in the region. In this study, we analyse the observed changes in twelve extreme temperature indices and compare them with model simulations based on the Coupled Model Intercomparison Project Phase 5 (CMIP5). An optimal fingerprinting method is used to perform detection and attribution analyses on the changes in absolute intensity, percentile-based frequency, fixed threshold exceedances of temperature extremes and diurnal temperature ranges in the central and eastern TP. The results show that during 1958–2017 the TP has experienced increasing intensity and frequency of warm extremes and decreasing intensity and frequency of cold extremes, with almost all these changes larger than those in China and East China. The detection results and attribution analyses show that the anthropogenic (ANT) signal can be robustly detected in the trends for all extreme indices on the TP, and the natural (NAT) signal in some cases, too. The attributable contribution from ANT is estimated to be much larger than that from NAT for most indices. The study also indicates that the CMIP5 models may underestimate the magnitude of warming in some temperature extremes, especially the indices related to cold extremes. This should be kept in mind when informing adaptation decisions on the TP with projections based on the same models.
Effect of Land Use Change to the Increasing Land-Based Emission and Urban Heat Island Phenomenon in Bandung City
Authors: Puspita I B , Saputra F A 
Published: October 2019

Abstract
In order to fulfill the needs of built areas in Bandung encouraged land use changes in several areas. This land use change is one of the contributing factors to the increasing levels of carbon emissions in the air, which will have a further impact on the increasing urban temperature and Urban Heat Island phenomenon. Thus, this study was aimed to identify the effect of land use change on the increase of land-based emissions and temperatures in Bandung, as well as the trend in the future. This study utilized stock difference analysis method and the value of land-based emissions by using simple regression method. In addition, this study identified the effect of increase in emissions to the increase in temperature. The equation model produced from the regression was applied to identify the trend in 2031. Based on the results of the analysis, it was identified that land use change that occurred in 2003, 2011, 2014 and 2016 had an influence on increasing levels of carbon emissions in Bandung and had a significant influence on the increase in temperature. This temperature trend is projected to increase by an average of 1°C in 2031.
Economic Valuation Of Horticulture Organic Farming In Getasan, Semarang Regency
Authors: Asfawi S , Probandari A , Setyono P , Hartono  
Published: October 2019

Abstract
Agriculture can also be a source of environmental damage if poorly managed. The use of synthetic fertilizers and pesticides, changes in ecosystems and so on, are some examples of the damages to the environment due to excessive use of chemicals in agriculture. Conventional agriculture is considered easier, but the use of synthetic chemicals in conventional agricultural activities can disrupt biodiversity, soil fertility, ecosystems, and health. This study aims to calculate the economic assessment of organic horticultural agriculture by comparing the phenomenon of two types of horticultural agriculture. The survey was conducted by using random sampling to 70 respondents. The results show that the ratio of the benefits of horticultural organic farming is higher (3.06) compared to the benefits of conventional agricultural cultivation (1.73) with a significant difference. This is due to lower costs for fertilizers and organic plant protection, and also lower selling prices, even though the productivity of organic land is lower, but not significant. It is strongly recommended that conventional farmers move their farming methods to organic, because it will be more beneficial in terms of environmental sustainability as well as of the health of farmers, because it minimizes synthetic chemicals that are less safe for the environment and health, especially with excessive uses. The role of the government is highly expected, because without government support through either policy or assistance, farmers cannot optimally farm organically.