Illustrated Holocene Era Timeline
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Mathematics Is a Gentleman's Art: Analysis and Synthesis in American College Geometry Teaching, 1790-1840 Amy K
Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 2000 Mathematics is a gentleman's art: Analysis and synthesis in American college geometry teaching, 1790-1840 Amy K. Ackerberg-Hastings Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Higher Education and Teaching Commons, History of Science, Technology, and Medicine Commons, and the Science and Mathematics Education Commons Recommended Citation Ackerberg-Hastings, Amy K., "Mathematics is a gentleman's art: Analysis and synthesis in American college geometry teaching, 1790-1840 " (2000). Retrospective Theses and Dissertations. 12669. https://lib.dr.iastate.edu/rtd/12669 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margwis, and improper alignment can adversely affect reproduction. in the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. -
BERMAN-THESIS-2020.Pdf (4.226Mb)
The Attributes and Formation Mechanisms of Kallistos Vallis, Venus by Derek A. Berman, B.S. A Thesis In Geosciences Submitted to the Graduate Faculty of Texas Tech University in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE Approved David W. Leverington, Ph.D. Chair of Committee Haraldur R. Karlsson, Ph.D. Harold Gurrola, Ph.D. Dr. Mark Sheridan Dean of the Graduate School December, 2020 Copyright 2020, Derek A. Berman Texas Tech University, Derek A. Berman, December 2020 ACKNOWLEDGMENTS I would like give my heartfelt gratitude and thanks to all my committee members. I would like to thank Dr. David Leverington for working with me these past years to accomplish this research and further my knowledge of planetary geology, geomorphology, and remote sensing. I hope this will be just the start to future collaborations, and that in 20 years we can still consider each other friends and colleagues in science. Thank you to Dr. Hal Karlsson for all your thoughtful comments and feedback on my thesis and a thank you to Dr. Harold Gurrola for serving on my thesis committee. I would also like to thank Lucia Barbato, Cameron Griffith, and Dr. Callum Hetherington for all the thoughtful advice, mentoring, and academic training. The three of you definitely helped to enrich my academic experience at TTU. The past several years have represented a huge personal growth period, full of challenges and triumphs. I want to thank all my friends and family members who lent me their undying support and motivation. I especially want to thank my sister Nicole, who was with me through the toughest of times, and my friends Giovanni, Luka, and Matteo, as well as all the members of the “Italian Club”, for your camaraderie and kind words of encouragement. -
Health Concerns of Heavy Metals (Pb; Cd; Hg) and Metalloids (As)
Health concerns of the heavy metals and metalloids Chris Cooksey • Toxicity - acute and chronic • Arsenic • Mercury • Lead • Cadmium Toxicity - acute and chronic Acute - LD50 Trevan, J. W., 'The error of determination of toxicity', Proc. Royal Soc., 1927, 101B, 483-514 LD50 (rat, oral) mg/kg CdS 7080 NaCl 3000 As 763 HgCl 210 NaF 52 Tl2SO4 16 NaCN 6.4 HgCl2 1 Hodge and Sterner Scale (1943) Toxicity Commonly used term LD50 (rat, oral) Rating 1 Extremely Toxic <=1 2 Highly Toxic 1 - 50 3 Moderately Toxic 50 - 500 4 Slightly Toxic 500 - 5000 5 Practically Non-toxic 5000 - 15000 6 Relatively Harmless >15000 GHS - CLP LD50 Category <=5 1 Danger 5 - 50 2 Danger 50 - 300 3 Danger 300 - 2000 4 Warning Globally Harmonised System of Classification and Labelling and Packaging of Chemicals CLP-Regulation (EC) No 1272/2008 Toxicity - acute and chronic Chronic The long-term effect of sub-lethal exposure • Toxicity - acute and chronic • Arsenic • Mercury • Lead • Cadmium Arsenic • Pesticide o Inheritance powder • Taxidermy • Herbicide o Agent Blue • Pigments • Therapeutic uses Inorganic arsenic poisoning kills by allosteric inhibition of essential metabolic enzymes, leading to death from multi- system organ failure. Arsenicosis - chronic arsenic poisoning. Arsenic LD50 rat oral mg/kg 10000 1000 LD50 100 10 1 Arsine Arsenic acid Trimethylarsine Emerald green ArsenicArsenious trisulfide oxideSodium arsenite MethanearsonicDimethylarsinic acid acid Arsenic poisoning by volatile arsenic compounds from mouldy wall paper in damp rooms • Gmelin (1839) toxic mould gas • Selmi (1874) AsH3 • Basedow (1846) cacodyl oxide • Gosio (1893) alkyl arsine • Biginelli (1893) Et2AsH • Klason (1914) Et2AsO • Challenger (1933) Me3As • McBride & Wolfe (1971) Me2AsH or is it really true ? William R. -
Historical Group
Historical Group NEWSLETTER and SUMMARY OF PAPERS No. 61 Winter 2012 Registered Charity No. 207890 COMMITTEE Chairman: Prof A T Dronsfield, School of Education, | Prof J Betteridge (Twickenham, Middlesex) Health and Sciences, University of Derby, | Dr N G Coley (Open University) Derby, DE22 1GB [e-mail [email protected]] | Dr C J Cooksey (Watford, Hertfordshire) Secretary: | Prof E Homburg (University of Maastricht) Prof W P Griffith, Department of Chemistry, | Prof F James (Royal Institution) Imperial College, South Kensington, London, | Dr D Leaback (Biolink Technology) SW7 2AZ [e-mail [email protected]] | Dr P J T Morris (Science Museum) Treasurer; Membership Secretary: | Prof. J. W. Nicholson (University of Greenwich) Dr J A Hudson, Graythwaite, Loweswater, | Mr P N Reed (Steensbridge, Herefordshire) Cockermouth, Cumbria, CA13 0SU | Dr V Quirke (Oxford Brookes University) [e-mail [email protected]] | Dr S Robinson (Ham, Surrey) Newsletter Editor: | Prof. H. Rzepa (Imperial College) Dr A Simmons, Epsom Lodge, | Dr. A Sella (University College) La Grande Route de St Jean,St John, Jersey, JE3 4FL [e-mail [email protected]] Newsletter Production: Dr G P Moss, School of Biological and Chemical, Sciences Queen Mary University of London, Mile End Road, London E1 4NS [e-mail [email protected]] http://www.chem.qmul.ac.uk/rschg/ http://www.rsc.org/membership/networking/interestgroups/historical/index.asp Contents From the Editor 2 RSC Historical Group News - Bill Griffith 3 Identification Query - W. H. Brock 4 Members’ Publications 5 NEWS AND UPDATES 6 USEFUL WEBSITES AND ADDRESSES 7 SHORT ESSAYS 9 The Copperas Works at Tankerton - Chris Cooksey 9 Mauveine - the final word? (3) - Chris Cooksey and H. -
The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars
Heavenly Mathematics: The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars Helmer Aslaksen Department of Mathematics National University of Singapore [email protected] www.math.nus.edu.sg/aslaksen/ www.chinesecalendar.net 1 Public Holidays There are 11 public holidays in Singapore. Three of them are secular. 1. New Year’s Day 2. Labour Day 3. National Day The remaining eight cultural, racial or reli- gious holidays consist of two Chinese, two Muslim, two Indian and two Christian. 2 Cultural, Racial or Religious Holidays 1. Chinese New Year and day after 2. Good Friday 3. Vesak Day 4. Deepavali 5. Christmas Day 6. Hari Raya Puasa 7. Hari Raya Haji Listed in order, except for the Muslim hol- idays, which can occur anytime during the year. Christmas Day falls on a fixed date, but all the others move. 3 A Quick Course in Astronomy The Earth revolves counterclockwise around the Sun in an elliptical orbit. The Earth ro- tates counterclockwise around an axis that is tilted 23.5 degrees. March equinox June December solstice solstice September equinox E E N S N S W W June equi Dec June equi Dec sol sol sol sol Beijing Singapore In the northern hemisphere, the day will be longest at the June solstice and shortest at the December solstice. At the two equinoxes day and night will be equally long. The equi- noxes and solstices are called the seasonal markers. 4 The Year The tropical year (or solar year) is the time from one March equinox to the next. The mean value is 365.2422 days. -
Charles Galton Darwin's 1922 Quantum Theory of Optical Dispersion
Eur. Phys. J. H https://doi.org/10.1140/epjh/e2020-80058-7 THE EUROPEAN PHYSICAL JOURNAL H Charles Galton Darwin's 1922 quantum theory of optical dispersion Benjamin Johnson1,2, a 1 Max Planck Institute for the History of Science Boltzmannstraße 22, 14195 Berlin, Germany 2 Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4, 14195 Berlin, Germany Received 13 October 2017 / Received in final form 4 February 2020 Published online 29 May 2020 c The Author(s) 2020. This article is published with open access at Springerlink.com Abstract. The quantum theory of dispersion was an important concep- tual advancement which led out of the crisis of the old quantum theory in the early 1920s and aided in the formulation of matrix mechanics in 1925. The theory of Charles Galton Darwin, often cited only for its reliance on the statistical conservation of energy, was a wave-based attempt to explain dispersion phenomena at a time between the the- ories of Ladenburg and Kramers. It contributed to future successes in quantum theory, such as the virtual oscillator, while revealing through its own shortcomings the limitations of the wave theory of light in the interaction of light and matter. After its publication, Darwin's theory was widely discussed amongst his colleagues as the competing inter- pretation to Compton's in X-ray scattering experiments. It also had a pronounced influence on John C. Slater, whose ideas formed the basis of the BKS theory. 1 Introduction Charles Galton Darwin mainly appears in the literature on the development of quantum mechanics in connection with his early and explicit opinions on the non- conservation (or statistical conservation) of energy and his correspondence with Niels Bohr. -
A Review of Nanostructured Non-Titania Photocatalysts and Hole Scavenging Agents for CO2 Photoreduction Processes
Heriot-Watt University Research Gateway A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO2 photoreduction processes Citation for published version: Tan, JZY & Maroto-Valer, MM 2019, 'A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO photoreduction processes', Journal of Materials Chemistry A, vol. 7, no. 16, pp. 9368-9385. https://doi.org/10.1039/C8TA10410G2 Digital Object Identifier (DOI): 10.1039/C8TA10410G Link: Link to publication record in Heriot-Watt Research Portal Document Version: Publisher's PDF, also known as Version of record Published In: Journal of Materials Chemistry A General rights Copyright for the publications made accessible via Heriot-Watt Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy Heriot-Watt University has made every reasonable effort to ensure that the content in Heriot-Watt Research Portal complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 06. Oct. 2021 Journal of Materials Chemistry A View Article Online REVIEW View Journal | View Issue A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO Cite this: J. Mater. Chem. A,2019,7, 2 9368 photoreduction processes Jeannie Z. Y. Tan * and M. Mercedes Maroto-Valer The imperative for the development of sustainable energy technologies to alleviate the heavy reliance on fossil fuels as well as to mitigate the serious environmental issues associated with CO2 emission has fostered the development of solar fuels through CO2 photoreduction. -
The Grand Challenges in the Chemical Sciences
The Israel Academy of Sciences and Humanities Celebrating the 70 th birthday of the State of Israel conference on THE GRAND CHALLENGES IN THE CHEMICAL SCIENCES Jerusalem, June 3-7 2018 Biographies and Abstracts The Israel Academy of Sciences and Humanities Celebrating the 70 th birthday of the State of Israel conference on THE GRAND CHALLENGES IN THE CHEMICAL SCIENCES Participants: Jacob Klein Dan Shechtman Dorit Aharonov Roger Kornberg Yaron Silberberg Takuzo Aida Ferenc Krausz Gabor A. Somorjai Yitzhak Apeloig Leeor Kronik Amiel Sternberg Frances Arnold Richard A. Lerner Sir Fraser Stoddart Ruth Arnon Raphael D. Levine Albert Stolow Avinoam Ben-Shaul Rudolph A. Marcus Zehev Tadmor Paul Brumer Todd Martínez Reshef Tenne Wah Chiu Raphael Mechoulam Mark H. Thiemens Nili Cohen David Milstein Naftali Tishby Nir Davidson Shaul Mukamel Knut Wolf Urban Ronnie Ellenblum Edvardas Narevicius Arieh Warshel Greg Engel Nathan Nelson Ira A. Weinstock Makoto Fujita Hagai Netzer Paul Weiss Oleg Gang Abraham Nitzan Shimon Weiss Leticia González Geraldine L. Richmond George M. Whitesides Hardy Gross William Schopf Itamar Willner David Harel Helmut Schwarz Xiaoliang Sunney Xie Jim Heath Mordechai (Moti) Segev Omar M. Yaghi Joshua Jortner Michael Sela Ada Yonath Biographies and Abstracts (Arranged in alphabetic order) The Grand Challenges in the Chemical Sciences Dorit Aharonov The Hebrew University of Jerusalem Quantum Physics through the Computational Lens While the jury is still out as to when and where the impressive experimental progress on quantum gates and qubits will indeed lead one day to a full scale quantum computing machine, a new and not-less exciting development had been taking place over the past decade. -
Geochronology Database for Central Colorado
Geochronology Database for Central Colorado Data Series 489 U.S. Department of the Interior U.S. Geological Survey Geochronology Database for Central Colorado By T.L. Klein, K.V. Evans, and E.H. DeWitt Data Series 489 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Reston, Virginia: 2010 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: T.L. Klein, K.V. Evans, and E.H. DeWitt, 2009, Geochronology database for central Colorado: U.S. Geological Survey Data Series 489, 13 p. iii Contents Abstract ...........................................................................................................................................................1 Introduction.....................................................................................................................................................1 -
Vaughn Next Century Learning Center
2020 VAUGHN 2021 NEXT CENTURY LEARNING CENTER July/julio 2020 JULY-JULIO January/enero 2021 S M T W Th F S 1-31 Summer Vacation S M T W Th F S 1 2 3 4 30-31 Staff Development 1 2 5 6 7 8 9 10 11 3 SPED SPED SPED ESY ESY 9 12 13 14 15 16 17 18 AUGUST-AGOSTO 10 ESY ESY ESY ESY ESY 16 19 20 21 22 23 24 25 1 Compact Signing 17 18 ESY ESY ESY ESY 23 26 27 28 29 SD SD 3 Staff Development 24 ESY ESY ESY ESY SPED 30 0 4 FIRST DAY OF SCHOOL 31 August/agosto 2020 0 S M T W Th F S SEPTEMBER-SEPTIEMBRE February/febrero 2021 CS 4 Minimum Day (Comp Time) S M T W Th F S 2 SD 4 5 6 7 8 7 Labor Day Holiday SD 2 3 4 5 6 9 10 11 12 13 14 15 7 8 9 10 11 12 13 16 17 18 19 20 21 22 OCTOBER-OCTUBRE 14 15 16 17 18 19 20 23 24 25 26 27 28 29 5-9 Fall Break 21 22 23 24 25 26 27 30 31 28 20 NOVEMBER-NOVIEMBRE 18 September/septiembre 2020 3 Election Day - No Committee Meeting March/marzo 2021 S M T W Th F S 11 Veteran's Day Holiday S M T W Th F S 1 2 3 4 5 25 Minimum Day (Comp Time) 1 2 3 4 5 6 6 7 8 9 10 11 12 26-27 Thanksgiving Day Holiday 7 8 9 10 11 12 13 13 14 15 16 17 18 19 14 15 16 17 18 19 20 20 21 22 23 24 25 26 DECEMBER-DICIEMBRE 21 22 23 24 25 26 27 27 28 29 30 17 Minimum Day 28 29 30 31 21 18-31 Winter Vacation 20 October/octubre 2020 April/abril 2021 S M T W Th F S JANUARY-ENERO S M T W Th F S 1 2 3 1-6 Winter Vacation 1 2 3 4 5 6 7 8 9 10 4-6, 29 SpEd ESY (ID'd SPED Only) 4 5 6 7 8 9 10 11 12 13 14 15 16 17 7-28 ESY 11 12 13 14 15 16 17 18 19 20 21 22 23 24 18 Martin Luther King Jr Holiday 18 19 20 21 22 23 24 25 26 27 28 29 30 31 29 No School (Except -
Special Supplement to the Bulletin of the American Meteorological Society Vol
J. Blunden, D. S. Arndt, and M. O. Baringer, Eds. Associate Eds. H. J. Diamond, A. J. Dolman, R. L. Fogt, B. D. Hall, M. Jeffries, J. M. Levy, J. M. Renwick, J. Richter-Menge, P. W. Thorne, L. A. Vincent, and K. M. Willett Special Supplement to the Bulletin of the American Meteorological Society Vol. 92, No. 6, June 2011 STATE OF THE CLIMATE IN 2010 STATE OF THE CLIMATE IN 2010 JUNE 2011 | S1 HOW TO CITE THIS DOCUMENT __________________________________________________________________________________________ Citing the complete report: Blunden, J., D. S. Arndt, and M. O. Baringer, Eds., 2011: State of the Climate in 2010. Bull. Amer. Meteor. Soc., 92 (6), S1 –S266. Citing a chapter (example): Fogt, R. L., Ed., 2011: Antarctica [in “State of the Climate in 2010”]. Bull. Amer. Meteor. Soc., 92 (6), S161 –S171. Citing a section (example): Wovrosh, A. J., S. Barreira, and R. L. Fogt, 2011: [Antarctica] Circulation [in “State of the Climate in 2010”]. Bull. Amer. Meteor. Soc., 92 (6), S161 –S163. S2 | JUNE 2011 Editor & Author Affiliations (ALPHABETICAL BY NAME ) Achberger, Christine, Earth Sciences Centre, University of Belward, Alan S., Global Environment Monitoring Unit, IES, EC Gothenburg, Gothenburg, Sweden Joint Research Centre, Ispra, Italy Ackerman, Steven A., CIMSS University of Wisconsin - Madi- Benedetti, Angela, European Centre for Medium-Range son, Madison, Wisconsin Weather Forecasts, Reading, United Kingdom Ahlstrøm, A., Geological Survey of Denmark and Greenland Berrisford, Paul, NCAS-Climate, European Centre for Medi- (GEUS), -
Package 'Lubridate'
Package ‘lubridate’ February 26, 2021 Type Package Title Make Dealing with Dates a Little Easier Version 1.7.10 Maintainer Vitalie Spinu <[email protected]> Description Functions to work with date-times and time-spans: fast and user friendly parsing of date-time data, extraction and updating of components of a date-time (years, months, days, hours, minutes, and seconds), algebraic manipulation on date-time and time-span objects. The 'lubridate' package has a consistent and memorable syntax that makes working with dates easy and fun. Parts of the 'CCTZ' source code, released under the Apache 2.0 License, are included in this package. See <https://github.com/google/cctz> for more details. License GPL (>= 2) URL https://lubridate.tidyverse.org, https://github.com/tidyverse/lubridate BugReports https://github.com/tidyverse/lubridate/issues Depends methods, R (>= 3.2) Imports generics, Rcpp (>= 0.12.13) Suggests covr, knitr, testthat (>= 2.1.0), vctrs (>= 0.3.0), rmarkdown Enhances chron, timeDate, tis, zoo LinkingTo Rcpp VignetteBuilder knitr Encoding UTF-8 LazyData true RoxygenNote 7.1.1 SystemRequirements A system with zoneinfo data (e.g. /usr/share/zoneinfo) as well as a recent-enough C++11 compiler (such as g++-4.8 or later). On Windows the zoneinfo included with R is used. 1 2 R topics documented: Collate 'Dates.r' 'POSIXt.r' 'RcppExports.R' 'util.r' 'parse.r' 'timespans.r' 'intervals.r' 'difftimes.r' 'durations.r' 'periods.r' 'accessors-date.R' 'accessors-day.r' 'accessors-dst.r' 'accessors-hour.r' 'accessors-minute.r' 'accessors-month.r'