What Does the Current Research Say About Effective Strategies for Teaching Reading Fluency?

Reading fluency, a person’s ability to read with speed, accuracy, and prosody, is one of the five major dimensions of reading instruction. Effective reading fluency instruction is crucial to the success of developing readers. The ability to read fluently directly impacts the ability to engage in other reading skills, as instruction with reading fluency is often integrated with skills such as reading comprehension and phonics. There are a plethora of evidence-based strategies for teaching reading instruction. While these strategies vary the delivery of instruction or materials needed, they all share a foundation of thorough research and continued efficacy in the field of education. In order to maximize the potential for student success in reading fluency and reading ability overall, the employment of some of these evidence-based strategies is essential and noteworthy for educators. The following is a literature review detailing what the current research suggests for effective instruction in reading fluency

Environmental Drivers of Mesophotic Echinoderm Assemblages of the Southeastern Pacific Ocean

Mesophotic ecosystems (50–400 m depth) of the southeastern Pacific have rarely been studied because of the logistical challenges in sampling across this remote zone. This study assessed how oxygen concentrations and other environmental predictors explain variation in echinoderm assemblages at these mesophotic systems, where this group is among the predominant fauna. We compiled data on echinoderm taxa at 91 sampling stations, from historical and recent surveys (between 1950 and 2019), covering a longitudinal gradient of approximately 3,700 km along with the Nazca, Salas y Gómez, and Juan Fernández ridges. Uni- and multivariate model-based tools were applied to analyze the patterns of benthic fauna in relation to environmental factors. Our results indicate a significant positive relationship between echinoderm species richness and depth, oxygen, and salinity. Changes in echinoderm community composition were significantly explained by oxygen, longitude, and chlorophyll-a. We observed notable species turnovers at ∼101 and ∼86°W, where assemblages tend to be more variable across stations. This turnover possibly reflects the effects of physical barriers to dispersion (e.g., currents) and habitat changes. Echinoderm assemblages observed around Easter and Desventuradas Islands presented a high occurrence of potentially endemic taxa and distinct species assemblages. This study is the first to assess the structure of mesophotic echinoderm assemblages of the southeastern Pacific Ocean along a large spatial scale. The information reported here could help design appropriate management tools for the vast, recently created, marine protected areas in the southeastern Pacific

Assessment of physical, environmental, and cardiac strain in 43 operators (wearing protective equipment) conducting clean-up of heavy oil products

Background. The aim of the study was to organise an assessment of the physical strains and environmental exposure to hydrocarbon derivatives in persons involved in shoreline clean-up of heavy oil products, in order to investigate the dangers of oil spill clean-up. Material and methods. Forty-three healthy volunteers wearing protective equipment cleaning up an artificial shoreline underwent cardiac strain measurements, as well as a study of thermal stress (approximate WBGT index, water loss, measurement of internal body temperature before and after physical activity). A subjective assessment of perceived exertion was correlated to articular strain indicators recorded for the weight of loads lifted, movement frequency, and the range of movement. Environmental exposure was determined by using portable hydrocarbon detectors. Results. For adult subjects in good physical condition, in neutral temperatures, oil spill clean-up is considered non-arduous. However, in sedentary, stressed subjects exposed to difficult climatic conditions, cleanup can be considered hard to extremely hard. In terms of environmental exposure, slight traces of toluene appeared once out of a total of 18 analysed samples. Conclusions. The sample studied was subject to physical articular strains and presented variable cardiac strain; environmental exposure was, on the other hand, slight when involving cleaning up heavy petroleum products. The subjects liable to carry out this activity are more tolerant to the efforts required when they are healthy, fit, young adults, in the non-arduous thermal conditions recorded in this study

Surface Vibrations in a Model Hcp Crystal

Journals published by the American Physical Society can be found at http://journals.aps.org