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n statistics, the standard deviation is a measure that is used to quantify the amount of variation or dispersion of a set of data values. A low standard deviation indicates that the data points tend to be close to the mean also called the expected value of the set, while a high standard deviation

In a recent article The 3 Instructional Shifts That Will Redefine the College Professor, the 'dynamic classroom' was listed as number one. The dynamic classroom is where faculty "do practically anything other than lecture" (Craig, 2015). A meager definition but the idea is right on-active learning, where students apply concepts through discussion, debate, writing, hands-on experiments, etc. produces better learning results. Numerous studies back up the claim; a recent paper shows student performance increased by just under half a standard deviation with active learning compared with lecturing (Freeman et al., 2014). In this post I share a four-step strategy that instructors can use to make learning active for online, blended or face-to-face learning spaces. Readers will find instructive examples and resources on active learning in the photo gallery (below) as well as in the list of resources at the end of this post.

Penta Prisms are used to define right angles in optical systems. Penta Prisms, which provide right handed images, feature a ray deviation of 90°. Penta Prisms are five-sided prisms and unaffected by slight movements. Edmund Optics offers a variety of Penta Prisms for optimal performance in the Ultraviolet (UV), Visible, or Infrared (IR) spectrums. The Penta Prism will neither invert nor reverse the image. Penta prisms are extremely useful in alignment systems as they define a right angle very precisely and independently of angle of incidence. Rays entering one face emerge from the adjacent face at precisely 90 deg after they have undergone two reflections inside the prism for a total of 270 deg. The penta prism acts as a turning mirror which is insensitive to alignment. Penta prism is often used in Plumb Level, Surveying, Alignment, Range finding and Optical Tooling Factory Standard - Contact us for manufacturing limit or custom specifications Material: BK7 Grade A optical glass, Corning Fused Silica 7980, JGS1, JGS2 Dimension Tolerance: +/-0.1mm 90 Deviation Tolerance: Precision series: up to 2 arc seconds Flatness: Precision series: 1/4 at 632.8 nm Reflectivity: R > 95% per face from 630 to 680 nm Surface Quality: 60-40 scratch and dig Coating: On request Protective Bevel available Hyperion Optics is a professional premium supplier. We provide Anamorphic Lenses, Collimating Lenses, optical design manufacturing and so on. Want to know more? Please contact us.

All Centrifugal pumps operating in the European Union need to comply to energy consumption parameters. Any increase from the threshold can lead to heavy fines. Real time IoT monitoring solutions can help keep performance within expected parameters.

Corner cube is total reflecting prism formed by 3 perpendicular surfaces, where the incident light angle does not influence the final emerging light angle but reflected by 180°, it offers excellent parallelism between the incident and exit beams. Hyperion Optics supplies both corner cube in mount or without mount, our precision Corner Cube Retroreflectors have been used for Laser ranging, positioning and guidance, laser communication, optical transformation. Our typical production accuracy is beam deviation < 5 arc sec in diameter within 2 inches. Please see our precision and tolerance grid for your information. Corner Cube COMMERCIAL GRADE FACTORY STANDARD PRECISION GRADE Dimension Tolerance(mm) ±0.05 ±0.03 ±0.02 Angle Tolerance( Arc min) 5' 3' 30" Cosmetic(MIL-C-13830A) 80-50 40-20 20-10 Flatness  @632.8 nm 2 Lambda 1/2 Lambda 1/4 Lambda Coating (T% avg) VIS 96-98% 99% 99.5% Coating (R% avg) VIS 96-98% 99% 99.5% Materials Optical Glass,  fused silica Hyperion Optics is a professional premium supplier. We provide Anamorphic Lenses, Collimating Lenses, hyp design, corner cube prism and so on. Want to know more? Please contact us.