Predictive analysis of instruction in science to students’ declining in-terest in science-An analysis of gifted students of sixth - and seventh-grade in Taiwan

Students’ interest in science declines substantially in the transition from elementary to secondary education. Using students’ ratings of their instruction on the topic of oxidation-reduction reaction, we examined if changes in instructional practices accounted for differences in situational interest in science imagination instruction and enduring individual interest in science imagination between elementary and secondary school classrooms. Multilevel regression analyses were conducted for a sample of 162 sixth - and 161 seventh-grade gifted classrooms. The use of student experiments, the elicitation of student explanations, and lack of clarity accounted to varying degrees for disparities in science interest between grade levels. The impact of instructional practices on individual interest was mediated by situational interest

Evidence on Bullying, Safety, and Belonging in gifted students at secondary education school

In this study, we examine one commonly cited mechanism, the top dog/bottom dog phenomenon, which states that students at the top of a grade span (“top dogs”) have better experiences than those at the bottom (“bottom dogs”) for gifted students. Using an instrumental variables strategy introduced in Rockoff and Lockwood (2010) and a longitudinal data set containing student survey data for Kaohsiung City (in Taiwan) public secondary education school gifted students, we estimate the impact of top dog and bottom dog status on bullying, safety, belonging, and academic achievement by Multiple Regression. This article provides the first credibly causal evidence that top dog status improves the learning environment. We further find that the top dog effect is strongest in sixth grade and in schools with longer grade spans and that the top dog effect is not explained by new students to a school or student height. Finally, we find that the gifted students model is similar to the generally students model

SYNTHESES, STRUCTURES AND PROPERTIES OF NANOPOROUS METAL-ORGANIC FRAMEWORK MATERIALS

This dissertation describes the synthesis and characterization of a number of extended framework materials. Firstly, a series of transition metal and lanthanide metal-organic framework materials (MOFs) possessing both two and three-dimensional (2-D/ 3-D) structures as a result of linkage with different rigid carboxylate ligands have been synthesized. The crystal structures have been determined by single crystal X-ray diffraction, and their thermal/ structural stability evaluated by thermogravimetric analysis, powder neutron diffraction, in-situ and combined synchrotron powder X-ray and Raman spectroscopy. The structural stability strongly relates to the dimensionality and chemical bonding within the frameworks. In this dissertation, a geometric strategy has been proposed to elucidate these complex structures. A nanoporous structure stable up to 500oC can be obtained by dehydrating holmium MOF with 1, 3, 5-Benzene tricarboxylic acid (H3BTC) ligand. Its porosity is shown to be 879.1m2/g specific surface area by gas isotherm experiments and absorbing 1.46wt% excess of hydrogen at 77K. High resolution neutron powder diffraction has been performed on the dehydrated Ho-MOF-BTC system with P4122 chiral space group under different deuterium gas pressures and a new mechanism for gas adsorption in framework materials. A unique "helical" deuterium adsorption phenomenon results from direct interaction between the guest molecules and the non-centrosymmetric (chiral) framework architecture. Reconstruction of the nuclear scattering density using the charge flipping method has been utilized as a novel strategy for the qualitative analysis of the adsorbed molecules, in combination with maximum entropy method (MEM) density maps that provide quantitative information of the exact distribution of the diffusion pathways. In addition, the structure, magnetic and photo-luminescent properties of three lanthanide- and transition metal MOFs with shorter formate ligand are investigated by single crystal X-ray and neutron diffraction as well as solid-state fluorescence spectroscopy techniques, demonstrating unusual magnetic behaviors of Co-formate systems and strongly characteristic emission spectra from europium (Eu(III)) and terbium (Tb(III)) compounds

A Geometric View on Constrained M-Estimators

We study the estimation error of constrained M-estimators, and derive explicit upper bounds on the expected estimation error determined by the Gaussian width of the constraint set. Both of the cases where the true parameter is on the boundary of the constraint set (matched constraint), and where the true parameter is strictly in the constraint set (mismatched constraint) are considered. For both cases, we derive novel universal estimation error bounds for regression in a generalized linear model with the canonical link function. Our error bound for the mismatched constraint case is minimax optimal in terms of its dependence on the sample size, for Gaussian linear regression by the Lasso

Finite Element Analysis of a Novel Tensegrity-Based Vibratory Platform

The study aims to conduct the finite element analysis (FEA) of a novel tensegrity-based vibratory platform by using IronCAD software. and analyze its deformation under external forces to verify if the platform can generate the required advancing motion. Firstly, the structure and operating principles of the proposed platform are introduced. Subsequently, individual parts are created using IronCAD software and assembled to form a solid model of the entire platform. Finally, employing Multiphysics for IronCAD, FEA is conducted to analyze the platform’s displacement under different external forces, as well as to examine its natural frequencies and mode shapes. The simulation results indicate that the proposed platform effectively moves a part in a specified direction. Additionally, the maximum stress remains below the yield strength. Moreover, the mode shapes corresponding to the initial 3 natural frequencies contribute to the advancing motion

An Eye-Tracking Experiment of Investors’ Visual Attention and Investment Intention Toward Crowdfunding Platforms

Numerous crowdfunding platforms are available on the Web. Such platforms provide access for both profit-making and non-profit organizations. It is worth exploring how to attract investor attention related to viewing fundraising proposals and to assess investment intention on such platforms. The purpose of this study is to explore which one or more elements contained in fundraising proposals presented on the platforms under consideration significantly affect investment intention. In this study, three observable elements were selected based on the development of a business model, where an eye-tracking method was used to capture investors’ visual attention. Six experimental scenarios were developed, and a total of 48 participants were invited to participate. Finally, it was found that the value proposition element obtained the most visual attention, and the key activities element had a significant impact on the participants’ investment intention, especially when the proposal provided adequate details related to the appropriation of funds

The Key Successful Factors of Customer Service Experience

Customer service experience is an emerging research topic for researchers to further study. This study is to investigate the influences and relations from the complexity of customer service experience by the two-year project. To our knowledge, there is no theoretical grounding to discuss and analyze the antecedents and influences of customer service experience. Service providers gradually have understood the significance of customer service experience in service encounters and contexts. This study is to examine the important factors by employing the analytical network process to enable service providers to make proper strategies to deliver valuable and memorable customer service experience