The top 500 mathematics pins: Analysis of elementary mathematics activities on Pinterest

A 2017 study found that 87% of elementary teachers reported consulting Pinterest when planning mathematical lessons (Hertel & Wessman-Enzinger, 2017). When searching for resources on Pinterest, preservice teachers identified looking at the number of pins to determine their quality (Sawyer & Meyers, 2018). This leaves teacher educators wondering, what is the quality of materials that preservice and inservice teachers are finding on Pinterest? We conducted a document analysis on the top 500 elementary mathematics pins found on Pinterest to determine what kinds of elementary mathematics materials are available, what mathematics topics are represented, the level of cognitive demand of the elementary mathematics activities, and how the image found on the activities relates to the level of cognitive demand. We found that less than two percent of activities are the highest level of cognitive demand and decorative images are correlated with lower level elementary mathematics activities. With this information, teacher educators could help prepare teachers to decide which resources they should use and what they should look for to increase the level of cognitive demand of elementary mathematics activities they implement in their classroom

Prospectus, September 3, 1986

https://spark.parkland.edu/prospectus_1986/1019/thumbnail.jp

The Lantern Vol. 18, No. 2, Winter 1950

• To Pledge Allegiance • The Back Porch • Love Story • Symphony Finale • Bruised Hands • Defeat • Concerning Utility • Triplet • I Echo the Common Sentiment • Heads in Pen and Inkhttps://digitalcommons.ursinus.edu/lantern/1050/thumbnail.jp

Prospectus, December 12, 1984

CHRISTMAS EDITION; Have fun with your performance; Staff attends conference; PC Happenings; Children\u27s shows Dec. 15 and 16; Lifelong Learner Club meets; How important is blood?; Absenteeism attacks Stu-Go; Journey through Metamorphosis; Holiday traditions remembered; Where are the police when you need them?; Meter Maids Yes or No; Parkland security; Project Joy; Illegal entry; Winter shelter helps homeless; Try one of Champaign\u27s specialty shops; Branch out-try a new recipe; Christmas customs vary world-wide; Love, sex, friendship and college how well do they mix; Photography contest judging draws hopeful, interested, and anxious crowd; And the winners are...; More winners; Christmas Greetings; What did you think of the Prospectus this semester?; But I have patience; Beginning; Richard dedicates Christmas album to Karen; Vaughan rivals Hendrix as guitar great; P.A.L. will listen; German class films videotape; Festival of lights; Vriners, Vintage Champaign\u27s oldest restaurant; 2010 is stupendous; Catch a movie during break; Talking Heads make sense; Clifton, Pumphrey, Mullens gain honors; Prospectus looks back at 1984 fall sports; Phillips learned a great deal from \u27E-Man\u27; Chesnut, Chastain share similar position; Broken records inevitable for men\u27s track...; ...Women strike similar parallel to men; Women spring past Danville on the road; Lady Cobras defeat Lincoln College, 66-56https://spark.parkland.edu/prospectus_1984/1000/thumbnail.jp

On the nonlinear effects in focused ultrasound beams with frequency power law attenuation

This article belongs to a special issue: 43rd Annual UIA Symposium 23—25 April 2014 CSIC Madrid, Spain Edited By Margaret Lucas and Enrique Riera[EN] When finite amplitude ultrasound propagation is considered, changes in spatial features of focused ultrasound beams can be observed. These nonlinear effects typically appear in thermoviscous fluids as focal displacements, beam-width variations or gain changes. However, in soft-tissue media, the frequency dependence of the attenuation doesn t obey a squared law. In this way, these complex media response leads to weak dispersion that prevents the cumulative processes of energy transfer to higher harmonics. In this work we explore the influence of different frequency power law attenuation responses and its influence on the self-defocusing effects in focused ultrasound beams. Thus, we numerically explore the spatial field distributions produced by low-Fresnel number devices and High Intensity Focused Ultrasound (HIFU) radiating trough different soft-tissue media.The work was supported by Spanish Ministry of Science and Innovation through project FIS2011-29731-C02-01. N. Jiménez acknowledges financial support from the Universitat Politècnica de València (Spain) through the FPI2011 PhD grant.Jimenez, N.; Redondo, J.; Sánchez Morcillo, VJ.; Iglesias, PC.; Camarena Femenia, F. (2015). On the nonlinear effects in focused ultrasound beams with frequency power law attenuation. Physics Procedia. 63:47-53. https://doi.org/10.1016/j.phpro.2015.03.008S47536

Prospectus, November 26, 1986

https://spark.parkland.edu/prospectus_1986/1031/thumbnail.jp

Prospectus, November 19, 1986

https://spark.parkland.edu/prospectus_1986/1030/thumbnail.jp

Prospectus, April 24, 1985

https://spark.parkland.edu/prospectus_1985/1011/thumbnail.jp

Mass Activated Droplet Sorting (MADS) Enables Highâ Throughput Screening of Enzymatic Reactions at Nanoliter Scale

Microfluidic droplet sorting enables the highâ throughput screening and selection of waterâ inâ oil microreactors at speeds and volumes unparalleled by traditional wellâ plate approaches. Most such systems sort using fluorescent reporters on modified substrates or reactions that are rarely industrially relevant. We describe a microfluidic system for highâ throughput sorting of nanoliter droplets based on direct detection using electrospray ionization mass spectrometry (ESIâ MS). Droplets are split, one portion is analyzed by ESIâ MS, and the second portion is sorted based on the MS result. Throughput of 0.7â samplesâ sâ 1 is achieved with 98â % accuracy using a selfâ correcting and adaptive sorting algorithm. We use the system to screen â 15â 000â samples in 6â h and demonstrate its utility by sorting 25â nL droplets containing transaminase expressed in vitro. Labelâ free ESIâ MS droplet screening expands the toolbox for droplet detection and recovery, improving the applicability of droplet sorting to protein engineering, drug discovery, and diagnostic workflows.A microfluidic system for sorting nanoliter droplets based on mass spectrometry is presented. Fully automated, labelâ free sorting at 0.7â samplesâ sâ 1 is achieved with 98â % accuracy. In vitro transcription and translation (ivTT) of a transaminase enzyme in ca.â 25â nL samples is demonstrated and samples are sorted on the basis of enzyme activity.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154315/1/anie201913203.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154315/2/anie201913203-sup-0001-misc_information.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154315/3/anie201913203_am.pd

Mass Activated Droplet Sorting (MADS) Enables Highâ Throughput Screening of Enzymatic Reactions at Nanoliter Scale

Microfluidic droplet sorting enables the highâ throughput screening and selection of waterâ inâ oil microreactors at speeds and volumes unparalleled by traditional wellâ plate approaches. Most such systems sort using fluorescent reporters on modified substrates or reactions that are rarely industrially relevant. We describe a microfluidic system for highâ throughput sorting of nanoliter droplets based on direct detection using electrospray ionization mass spectrometry (ESIâ MS). Droplets are split, one portion is analyzed by ESIâ MS, and the second portion is sorted based on the MS result. Throughput of 0.7â samplesâ sâ 1 is achieved with 98â % accuracy using a selfâ correcting and adaptive sorting algorithm. We use the system to screen â 15â 000â samples in 6â h and demonstrate its utility by sorting 25â nL droplets containing transaminase expressed in vitro. Labelâ free ESIâ MS droplet screening expands the toolbox for droplet detection and recovery, improving the applicability of droplet sorting to protein engineering, drug discovery, and diagnostic workflows.Ein Mikrofluidiksystem zur Sortierung von Nanolitertröpfchen basierend auf Massenspektrometrie erreicht eine vollautomatische markierungsfreie Sortierung bei 0.7 Probenâ sâ 1 mit 98â % Genauigkeit. Die Inâ vitroâ Transkription und â Translation (ivTT) eines Transaminaseâ Enzyms in Proben von etwa 25â nL wird demonstriert, und die Proben werden nach ihrer Enzymaktivität sortiert.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154446/1/ange201913203-sup-0001-misc_information.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154446/2/ange201913203.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154446/3/ange201913203_am.pd