113 research outputs found
Teacher Action Research in Elementary Social Studies: Use of iPads in 6th Grade Geography Instruction
A university instructor and master teacher describe the limited examples of practitioner research in elementary social studies found in traditional publications. They present a social studies practitioner research project that investigated the use of various technologies in 6th grade geography to improve student engagement, collaboration and academic success. The authors suggest that practitioner research provides a structure for elementary teachers to investigate questions related to student learning of key social studies content, the social studies curriculum, and related skills. They suggest that practitioner research, as professional development or alternative to traditional teacher evaluation requirements, creates opportunities for elementary school teachers to focus on the teaching of social studies, raising both the status of social studies in elementary classrooms and the potential for increased teacher efficacy
PubMed and Beyond: Recent Advances and Best Practices in Biomedical Literature Search
Biomedical research yields a wealth of information, much of which is only
accessible through the literature. Consequently, literature search is an
essential tool for building on prior knowledge in clinical and biomedical
research. Although recent improvements in artificial intelligence have expanded
functionality beyond keyword-based search, these advances may be unfamiliar to
clinicians and researchers. In response, we present a survey of literature
search tools tailored to both general and specific information needs in
biomedicine, with the objective of helping readers efficiently fulfill their
information needs. We first examine the widely used PubMed search engine,
discussing recent improvements and continued challenges. We then describe
literature search tools catering to five specific information needs: 1.
Identifying high-quality clinical research for evidence-based medicine. 2.
Retrieving gene-related information for precision medicine and genomics. 3.
Searching by meaning, including natural language questions. 4. Locating related
articles with literature recommendation. 5. Mining literature to discover
associations between concepts such as diseases and genetic variants.
Additionally, we cover practical considerations and best practices for choosing
and using these tools. Finally, we provide a perspective on the future of
literature search engines, considering recent breakthroughs in large language
models such as ChatGPT. In summary, our survey provides a comprehensive view of
biomedical literature search functionalities with 36 publicly available tools.Comment: 27 pages, 6 figures, 36 tool
Solstice and Solar Position observations in Australian Aboriginal and Torres Strait Islander traditions
A major focus of the archaeoastronomical research conducted around the world
focuses on understanding how ancient cultures observed sunrise and sunset
points along the horizon, particularly at the solstices and equinoxes. Scholars
argue that observations of these solar points are useful for developing
calendars, informing ritual/ceremonial practices, and predicting seasonal
change. This is the foundation of the Eurocentric four-season Julian (and later
Gregorian) calendar. Famous examples include Stonehenge, Newgrange, Chichen
Itza, and Chankillo. Studies at these and other sites tend to focus on solar
point observations through alignments in stone arrangements, and the
orientations of monuments. Despite the ongoing study of Indigenous Knowledge in
Australia revealing a wealth of information about Aboriginal and Torres Strait
Islander observations and interpretations of solar, lunar, and stellar
properties and motions, very little has been published about the importance and
use of solar point observations. The authors examine this topic through four
case studies, based on methodological frameworks and approaches in ethnography,
ethnohistory, archaeology, and statistics. Our findings show that Aboriginal
and Torres Strait Islander people observe the solstices and other significant
sunrise/sunset points along the horizon for timekeeping and indicating seasonal
change - but in ways that are rather different to the four-season model
developed in Western Europe.Comment: Journal of Astronomical History and Heritage, Vol. 23(1), in press
(2020
Comprehensively identifying Long Covid articles with human-in-the-loop machine learning
A significant percentage of COVID-19 survivors experience ongoing
multisystemic symptoms that often affect daily living, a condition known as
Long Covid or post-acute-sequelae of SARS-CoV-2 infection. However, identifying
scientific articles relevant to Long Covid is challenging since there is no
standardized or consensus terminology. We developed an iterative
human-in-the-loop machine learning framework combining data programming with
active learning into a robust ensemble model, demonstrating higher specificity
and considerably higher sensitivity than other methods. Analysis of the Long
Covid collection shows that (1) most Long Covid articles do not refer to Long
Covid by any name (2) when the condition is named, the name used most
frequently in the literature is Long Covid, and (3) Long Covid is associated
with disorders in a wide variety of body systems. The Long Covid collection is
updated weekly and is searchable online at the LitCovid portal:
https://www.ncbi.nlm.nih.gov/research/coronavirus/docsum?filters=e_condition.LongCovi
The Ursinus Weekly, November 17, 1952
Faculty show is considered huge success • Dean addresses freshman class • Bus. Ad. Club sponsors debate on current economic issues • Y cabinet hears program plans of commissions • Dorm reps chosen to sell yearbooks • Speaker explains international bank • 11 articles, three books left in lost and found department • Ruby to give show on Friday • Benefit fashion show enjoyed by audience • I.R.C. attends model U.N. • Chest Drive opens today; $1300 set as final goal • Two Messiah soloists chosen • Lord to speak at Forum on November 25 • Freshmen petition to give breakage fees to Union • Rev. James tells What on earth God is doing • Alpha Psi sees play • Kratz, Moser describe Paris to French Club • Marine captain to speak • Editorials: Fashionable trend?; Let\u27s all give • No more expansiveness • Don Juan in Hell judged fine show • Engagements • Scribe reviews Russian movie • F.T.A. holds roast • Not as dead as you think claims fightin\u27st college • Time for change; Ursinus in 1870 • Go west young man ; Dawkins finds rare rattler • Snell\u27s Belles defeat Chestnut Hill in shutout • Court men begin pre-season drills • Drexel defeats Ursinus in final home tilt, 7-1 • Bakermen close season with 7-2 loss to Lehigh • Bears to try for equalizing victory • Juniata topples Bears in rain and mud, 7-0 • Two Ursinus Belles honored • Playoffs to decide champhttps://digitalcommons.ursinus.edu/weekly/1506/thumbnail.jp
A galaxy's accretion history unveiled from its integrated spectrum
We present a new method of quantifying a galaxy's accretion history from its integrated spectrum alone. Using full spectral fitting and calibrated regularization techniques we show how we can accurately derive a galaxy's mass distribution in age-metallicity space and further separate this into stellar populations from different chemical enrichment histories. By exploiting the fact that accreted lower mass galaxies will exhibit an offset to lower metallicities at fixed age compared to the in-situ stellar population, we quantify the fraction of light that comes from past merger events, that are long since mixed in phase-space and otherwise indistinguishable. Empirical age-metallicity relations (AMRs) parameterized for different galaxy masses are used to identify the accreted stellar populations and link them back to the progenitor galaxy's stellar mass. This allows us to not only measure the host galaxy's total ex-situ mass fraction (facc), but also quantify the relative amount of accreted material deposited by satellite galaxies of different masses, i.e. the accreted satellite mass function in analogy to the subhalo mass function. Using mock spectra of simulated, present-day galaxies from the EAGLE suite we demonstrate that our method can recover the total accreted fraction to within ≈12%, the stellar mass of the most massive accreted subhalo to within ≈26% and the slope of the accreted satellite mass function to within ≈16% of the true values from the EAGLE merger trees. Future application of this method to observations could potentially provide us accretion histories of hundreds of individual galaxies, for which deep integrated light spectroscopy is available
The Ursinus Weekly, December 10, 1951
Feulner goes to convention in New York • Supply Store announces 40 percent reductions • Pi Gamma Mu sets initiation banquet for new members • Booster Committee doing art work • Messiah concert called credit to Philip\u27s directing ability • Harte and Lukens named \u2753 year book co-editors • Count to speak at 3rd Forum on January 9 • Y hears lecture on loyalty oath • Students dance at winter whirl • Inge Rudloff to speak • Pre-Christmas week of gay events arrives • Curtain Club may give play again • Candlelight Communion planned Thursday night • St. Nick furthers his education by paying visit to Ursinus College • Editorials: Christmas spirit; Thanks for paint job; New religion discovered • English dorm life described as much different from U.S. • I\u27m dreaming of a tight Christmas • Christmas spirits rise as caroling day draws near • Investment in dinner at Millers\u27 home pays high dividends • Bruin court squad scores 67-61 win over Lycoming team in extra period • Snell\u27s Belles practice for coming court season • Intramural basketball to start after Xmas vacation • Temple Pharmacy defeated by locals as 1951-52 basketball season begins • Twenty-seven report to Coach Kuhrt Wieneke for wrestling • Crusaders\u27 rally dies as Bears win thriller, 60-58 • French Club holds annual holiday soiree • Teacher to address FTA • Jones reads Galsworthy • Chest reaches half mark • Chess Club scores loss to Lansdale teamhttps://digitalcommons.ursinus.edu/weekly/1530/thumbnail.jp
Disentangling the formation history of galaxies via population-orbit superposition: method validation
We present population-orbit superposition models for external galaxies based
on Schwarzschild's orbit-superposition method, by tagging the orbits with age
and metallicity. The models fit the density distributions, as well as
kinematic, age and metallicity maps from Integral Field Unit (IFU) spectroscopy
observations. We validate the method and demonstrate its power by applying it
to mock data, similar to those obtained by the Multi-Unit Spectroscopic
Explorer (MUSE) IFU on the Very Large Telescope (VLT). These mock data are
created from Auriga galaxy simulations, viewed at three different inclination
angles (). Constrained by MUSE-like mock data, our
model can recover the galaxy's stellar orbit distribution projected in orbital
circularity vs. radius , the intrinsic stellar population
distribution in age vs. metallicity , and the correlation between
orbits' circularity and stellar age . A physically motivated
age-metallicity relation improves recovering the intrinsic stellar population
distributions. We decompose galaxies into cold, warm and hot + counter-rotating
components based on their orbit circularity distribution, and find that the
surface density, mean velocity, velocity dispersion, age and metallicity maps
of each component from our models well reproduce those from simulation,
especially for projections close to edge-on. These galaxies exhibit strong
global age vs. relation, which is well recovered by our model. The
method has the power to reveal the detailed build-up of stellar structures in
galaxies, and offers a complement to local resolved, and high-redshift studies
of galaxy evolution.Comment: 20 pages, submitted to MNRA
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