Future work on harmonics : some expert opinions part I : wind and solar power

A workshop on power system harmonics was organized in Stockholm in January 2014. On the agenda was among others a discussion on what are the main issues on harmonics at the moment and in the near future. The results of this discussion are summarized in this paper and some of the issues are discussed in more detail in this paper and in its companion paper. This paper discusses emission from wind and solar power as well as advantages and disadvantages of active and passive filters

Basic calculation proficiency and mathematics achievement in elementary school children

The relation between skill in simple addition and subtraction and more general math achievement in elementary school is well established but not understood. Both the intrinsic importance of skill in simple calculation for math and the influence of conceptual knowledge and cognitive factors (working memory, processing speed, oral language) on simple calculation and math are plausible. The authors investigated the development of basic calculation fluency and its relations to math achievement and other factors by tracking a group of 259 United Kingdom English children from second to third grade. In both grades the group did not retrieve the solutions to most problems, but their math achievement was typical. Improvement in basic calculation proficiency was partially predicted by conceptual knowledge and cognitive factors. These factors only partially mediated the relation between basic calculation and math achievement. The relation between reading and math was wholly mediated by number measures and cognitive factors

The Use of Project-Based Learning in a Technology Course for Math and Science Teachers

In this project, pre- and in-service math and science teachers used project-based learning to learn the complex skills involved in integrating technology into math and science teaching. The teachers in the course E36.1002: Microcomputer Applications in Math and Science Instruction in the Department of Teaching & Learning at New York University developed a four-week curriculum that integrates math, science, and technology using a common theme chosen by the teachers. The program has received very positive feedback from all participants and may be expanded in the future. Some recommendations are provided on how field experience in teaching with technology can be integrated into math and science teacher education programs

Which one is better: presentation-based or content-based math search?

Mathematical content is a valuable information source and retrieving this content has become an important issue. This paper compares two searching strategies for math expressions: presentation-based and content-based approaches. Presentation-based search uses state-of-the-art math search system while content-based search uses semantic enrichment of math expressions to convert math expressions into their content forms and searching is done using these content-based expressions. By considering the meaning of math expressions, the quality of search system is improved over presentation-based systems

A Mathematical Solution for Medicine’s Unanswered Questions

An RWU math professor leads an undergraduate research team using computational math to solve knowledge gaps in the biomedical field

Math in Motion

Everything we know about the universe rests on the foundation of mathematics. Somehow, though, the magic of mathematics – the true power of numbers and their beautiful wildness – gets lost in math class. Children, our most magical thinkers, get turned off math in grade school and miss out on a language through which they could learn to read and change the world. VCU Math In Motion will generate a creative, dynamic STEM education initiative within the Richmond community using an innovative curriculum and a customized mobile unit to bring the beauty of math to Richmond region school children in grades 5-9, through partnerships across VCU and within the local school system

Factor Analysis Of Ordinal Data Based On Weighted Ranking And Its Application To Reduce Perception Variables To Math Lessons Of Senior High School Student

The objectives of research are to reduce dimension of ordinal data using factor analysis based on weighted ranking correlation. In general, the correlation is used Spearman ranking correlation. This papers will discuss about application of both methods on the case of simplify of student’s perception variables on math lessons. The samples of this research are 791 students which consist of questionnaire. Factor analysis based on the weighted ranking correlation have given the results the number of factors and variables domination on factors more good than Spearman ranking correlation. The factors that influence perception of senior high school students towards Math lesson are an internal motivation of students, negative assessment of the Math lesson, teaching methods of Math teacher, habit of learning of students in Math and the support of parents, and knowledge of impact and benefits of Math. Key Words: factor analysis, weighted ranking, perception, mat