The role of learning progressions in global scales

Learning progressions are valuable tools for the international assessment community. Ray Adams reports

Fast Fourier Transform algorithm design and tradeoffs

The Fast Fourier Transform (FFT) is a mainstay of certain numerical techniques for solving fluid dynamics problems. The Connection Machine CM-2 is the target for an investigation into the design of multidimensional Single Instruction Stream/Multiple Data (SIMD) parallel FFT algorithms for high performance. Critical algorithm design issues are discussed, necessary machine performance measurements are identified and made, and the performance of the developed FFT programs are measured. Fast Fourier Transform programs are compared to the currently best Cray-2 FFT program

Environmental Control and Life Support System

Viewgraphs on the Environmental Control and Life Support System (ECLSS) for the space station are presented. The ECLSS is divided into six subsystems: temperature and humidity control (THC), atmosphere control and supply (ACS), atmosphere revitalization (AR), fire detection and suppression (FDS), water recovery management (WRM), and waste management (WM). Topics covered include: ECLSS subsystem functions; ECLSS distributed system; ECLSS functional distribution; CO2 removal; CO2 reduction; oxygen generation; urine processor; and potable water recovery

What is \u27equity\u27 in education

Equity in education is often viewed as equivalence or sameness. A more useful way to view equity is through the lens of ‘fairness’

Book reviews

Teaching/Communication/Extension/Profession,

Experimental study of local strong parity violation in relativistic nuclear collisions

Parity-odd domains, corresponding to non-trivial topological solutions of the QCD vacuum, might be created in relativistic heavy ions collisions. These domains are predicted to lead to charge separation along the system orbital momentum of the system created in non-central collisions. Three-particle mixed harmonics azimuthal correlator is a \P even observable but directly sensitive to the charge separation effect. Using this observable to analyze Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}=200$ and 62 GeV, STAR detects a signal consistent with several of the theoretical expectations. Possible contributions from effects not related to parity violation are studied with existing event generators, which fail to describe the data. Future directions in studying the effect are discussed.Comment: Proceedings, plenary invited talk at Quark Matter 2009 Conference, Knoxville, Tennessee. One reference added. Final versio

Relationship between students’ economic, cultural, and social status, school climate and student achievement in Indonesia

PISA 2018 data shows that, in Indonesia, the relationship between students’ economic, cultural, and social status and their scores on reading achievement is weak. However, there is great variation between schools in average reading achievement with over 40% of the explainable variation in reading achievement being between-schools. In addition, in Indonesia, there is low social diversity across schools (students within schools are likely to be of similar economic, cultural, and social background). These conditions raise the question of whether school factors play a role – specifically whether school climate has a compensating, mediating or moderating effect on the relationship between students’ and schools’ economic, cultural, and social status and achievement. Using regression analysis, it was found that, in Indonesian schools, the composition of student body in terms of economic, cultural, and social status plays a significant role in explaining differences in reading achievement between schools. School climate was found to compensate and mediate the relationship between school economic, cultural, and social status and school reading achievement, particularly those dimensions related to classroom climate, student respect for diversity, school discrimination climate, student sense of belonging and teacher support and directed instruction practices. Only student sense of belonging was found to play moderating role in the relationship between school economic, cultural, and social status and school reading achievement, a finding that requires further investigation.https://research.acer.edu.au/ical/1001/thumbnail.jp