Where museums, libraries, and archives intersect

Diaporama d\u27une intervention au 32e congrès LIBER qui s\u27est tenu à Rome du 17 au 20 juin 2003. Exemple de coopération entre bibliothèques, musées et archives pour le développement des ressources en ligne à partir de l\u27activité du Research Libraries Group (RLG)

Engineered quasi-phase matching for nonlinear quantum optics in waveguides

Entanglement is the hallmark of quantum mechanics. Quantum entanglement -- putting two or more identical particles into a non-factorable state -- has been leveraged for applications ranging from quantum computation and encryption to high-precision metrology. Entanglement is a practical engineering resource and a tool for sidestepping certain limitations of classical measurement and communication. Engineered nonlinear optical waveguides are an enabling technology for generating entangled photon pairs and manipulating the state of single photons. This dissertation reports on: i) frequency conversion of single photons from the mid-infrared to 843nm as a tool for incorporating quantum memories in quantum networks, ii) the design, fabrication, and test of a prototype broadband source of polarization and frequency entangled photons; and iii) a roadmap for further investigations of this source, including applications in quantum interferometry and high-precision optical metrology. The devices presented herein are quasi-phase-matched lithium niobate waveguides. Lithium niobate is a second-order nonlinear optical material and can mediate optical energy conversion to different wavelengths. This nonlinear effect is the basis of both quantum frequency conversion and entangled photon generation, and is enhanced by i) confining light in waveguides to increase conversion efficiency, and ii) quasi-phase matching, a technique for engineering the second-order nonlinear response by locally altering the direction of a material's polarization vector. Waveguides are formed by diffusing titanium into a lithium niobate wafer. Quasi-phase matching is achieved by electric field poling, with multiple stages of process development and optimization to fabricate the delicate structures necessary for broadband entangled photon generation. The results presented herein update and optimize past fabrication techniques, demonstrate novel optical devices, and propose future avenues for device development. Quantum frequency conversion from 1848nm to 843nm is demonstrated for the first time, with >75% single-photon conversion efficiency. A new electric field poling methodology is presented, combining elements from multiple historical techniques with a new fast-feedback control system. This poling technique is used to fabricate the first chirped-and-apodized Type-II quasi-phase-matched structures in titanium-diffused lithium niobate waveguides, culminating in a measured phasematching spectrum that is predominantly Gaussian (R^2 = 0.80), nearly eight times broader than the unchirped spectrum, and agrees well with simulations

Pleistocene Mollusca of the Sunbeam Prairie Lacustrine Deposit, Darke Co., Ohio

Author Institution: Department of Geology, University of Toledo; U.S. Geological SurveyA study of the molluscan fauna of the Sunbeam Prairie lacustrine deposit of Darke County, OH combined with palynologic data from an earlier study provide an interpretation of the Late Wisconsinan history. Early Sunbeam Prairie Lake had a molluscan fauna dominated by Gyraulus parvus and Valvata lewisi. Valvata tricarinata, Fossaria obrussa, Gyraulus parvus, and Pisidium casertanum were dominant members of the diverse molluscan assemblage that existed during marl deposition, suggesting changing littoral conditions. The appearance of amnicolids and scattered terrestrial gastropods in the upper part of the marl section indicates a shallowing of water and an increase in aquatic vegetation. The latest stage of Sunbeam Prairie Lake was characterized by gradual infilling with humic sediments, reduction of the aquatic molluscan fauna, and an increase in the terrestrial gastropod fauna. A comparison of our molluscan data to earlier pollen data for the deposit provides inconclusive support for the recognition of the Two Creeks interval in pollen diagrams of central Indiana and Ohio

Digital Badges As Micro-Credentials: An Opportunity to Improve Learning or Just another Education Technology Fad?

Digital badges are online records of achievements that are awarded to learners for mastery of a specific set of educational contents. Often referred to as micro-credentials, digital badges are being used by many higher education institutions to assess and validate clearly defined chunks of knowledge, competency, or accomplishment. At present, the use of digital badges is widespread. As a result, the perception exists that digital badges might be over-sold and over-hyped, as an assessment tool. Instructional design practice, however, reveals that learning objectives are best attained when course contents are broken into manageable chunks. In this context, digital badges, serving as visible proofs of learning achievement or mastery of new skills, can thus help build the recipient’s self-confidence and strengthen his/her intrinsic motivation. Further, a digital badge system that is used as part of a course provides critical feedback to instructors regarding learners’ performance. Thus, from a summative assessment standpoint, instructors have the opportunity to gauge learners’ engagement, persistence and achievement simply by examining the number and types of badges issued in their courses. At present, there are no agreed-upon measures for what types of learning contents equate to the award of a digital badge. As a result, acceptance of digital badges outside of its issuing organization is limited. However, many third party organizations such as Mozilla are exploring ways in which to increase portability and transferability of digital badges. In this session, we provide an overview of digital badges. We will also examine how a digital badge system could possibly be implemented at Winthrop. Finally, we will look at the benefits and challenges of implementing digital badges or achievements in different educational settings such as non-credit programs, certificates offerings or regular courses

Searching for the effect of multiple uncontrolled interventions in BRMS

We search for the effects of 8 different (uncontrolled) interventions (1intervention per school) on the sub-concepts of learner’s (4th to 8th grade)motivation, self-regulation, and ICT competency data over the past threeyears. Data marking for intervention (yes/no), ICT competence of teachersand the presence of specially trained teachers are added to the formulas.Assessment of ICT competency in 3rd grade can be used as prior. Smoothsillustrate if the (motivation or self-regulation) concepts grow over timegrouped by intervention, school or grade. Grades are nested within schoolsand data is grouped by student. Are we missing anything

Towards a high-precision atomic gyroscope

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 2013.Cataloged from PDF version of thesis.Includes bibliographical references (pages 69-72).In this thesis, I report on the design and construction of the Rubidium Atomic Gyroscope Experiment (RAGE) at Draper Lab.by Mackenzie A. Van Camp.S.M

Measuring the Development of ICT Skills for Personalized Learning:Developing an Instrument for Dutch Primary Education

Our study investigates the development and validation of a questionnaire for competencies learners need to learn in a personalized way using ICT. 9 Dutch schools for primary education collaborate to make personalized learning with ICT evidence-informed. At these 9 iXperium schools, multidisciplinary design teams (consisting of primary school teachers and principals, teachers and students of the teacher-training program of a Dutch university of applied science, researchers from a Dutch university, and external ICT experts) design and research integrated interventions for PL with ICT. We defined personalized learning conditions before filtering the twenty-four learning objectives needed to measure development in personalized learning using ICT. The final questionnaire consists of thirty-three questions to cover the learning objectives. The validity and reliability of our questionary are analyzed in six steps. Cognitive validity (1) and a response model (2) are reported based on literature and a pilot with three iterative rounds of interviews (n=19). Internal constancy (3), confirmatory factor analysis (4), coefficient H (5) are reported after the first run of the questionnaire (n=800), and a test-retest alpha is reported after the second run of the questionnaire (n=800)

Nutritional profile of foods offered and consumed in a Belgian university canteen

Objective: To evaluate the nutritional profile of a lunch offered and consumed in a university canteen in Belgium. Design: The qualitative and quantitative content of 4365 meals theoretically available and 330 meals consumed was recorded during five weekdays spread over three weeks. Meal combinations were evaluated using a scoring system based on recommendations for Na content, energy from fat, and fruit and vegetable portions. Setting: University canteen in Belgium. Results: Only a 5 % of the meal combinations available and consumed complied with the three basic dietary recommendations for a hot lunch. The nutritional profile of the meals consumed was in line with that of the meals available. Conclusions: Our results show how the nutritional profile of what is eaten is largely determined by what is offered. To ensure overall compliance with dietary recommendations, considerable changes on the supply side, i.e. an increase in fruit and vegetable portions and a reduction in salt and fat of the lunch, are needed first in our setting. Our assessment provides baseline data to pilot a nutrient profiling intervention and shows how a nutrient profiling system can be used for meal evaluation purposes

COMPILING, SYNTHESIZING AND ANALYZING EXISTING BOREAL FOREST FIRE HISTORY DATA IN ALASKA

Wildland fires play a critical role in maintaining the ecological integrity of boreal forests in Alaska. Identifying and maintaining natural fire regimes is an important component of fire management. There are numerous research projects that directly or indirectly address historical fire regimes in the Alaskan boreal forest, but many are unpublished, have many unprocessed dendrochronological (tree age and fire scar) samples, or their data were used for other purposes. Furthermore, no assessment of these data exists to understand how fire has historically affected the boreal forest ecosystems of Alaska. The goal of this project was to compile and synthesize existing Alaska boreal-forest fire-history literature and datasets (http://frames.nbii.gov/alaska/borealfirehistory). We include a literature review and synthesis of publications related to fire regimes in boreal forests in Alaska (the pending general technical report “Fire Regimes of the Alaskan Boreal Forest”), and incorporate the reference information into the Alaska Fire Effects Reference Database (http://frames.nbii.gov/alaska; funded by JFSP as part of project 05-4-2-03: Expanding FIREHouse to Alaska). Fourteen published and unpublished fire-history or stand-age datasets were compiled and processed into the Alaska Fire History Database (http://frames.nbii.gov/documents/alaska/fire_history/ak_fire_history_db.zip), and data summarized by plot are available through a dynamic map interface (within the Alaska Fire and Fuels Research Map; http://afsmaps.blm.gov/imf/imf.jsp?site=firehouse). Data compiled in the Alaska Fire History Database have also been submitted to the International Multiproxy Paleofire Database (IMPD). Finally, some of the project funds were used to clean up and improve data within the Alaska Large Fire Database, a database started in the early 1990s that includes reported fire locations since 1939 and fire perimeters since 1942 (http://afsmaps.blm.gov/imf/imf.jsp?site=firehistory)

The Iowa Homemaker vol.3, no.4-5

Table of Contents We “Do Over” Our Rooms by Irma Camp and Alice Dodge, page 1 The Mysteries of Amateur Make Up by Frederica Shattuck, page 2 Fall Time Is Pickling Time by Katherine Howells, page 4 Episodes Concerning Evolution of Home Economics by Ruth Elaine Wilson, page 5 Tea – Suggestive of the Rainbow by Esther Ellen Rayburn, page 6 Vary the Vegetable by Blanche Ingersoll, page 7 Constipation and Its Dangers by Anne Mundt, page 8 Graduate Credit Conference for Vocational Home Economics at Iowa State by Eleanor Murray, page 9 Fish That Is Appetizing by Maxine Smith, page 9 Economy, Or a Wrong Idea by Harriett Wallace, page 1