An Ideological Analysis of Digital Reference Service Models.

ERIC Educational Resources Information Center

Dilevko, Juris

2001-01-01

Looks at some of the new paradigms for reference service, in particular the ideological implications of the digital reference call-center model, demonstrates how they lead to a "deprofessionalization" of reference work, and provides examples of how extensive reading can help reference librarians provide better service and become an…

A Mixed-Method Approach on Digital Educational Games for K12: Gender, Attitudes and Performance

NASA Astrophysics Data System (ADS)

Law, Effie Lai-Chong; Gamble, Tim; Schwarz, Daniel; Kickmeier-Rust, Michael D.; Holzinger, Andreas

Research on the influence of gender on attitudes towards and performance in digital educational games (DEGs) has quite a long history. Generally, males tend to play such games more engagingly than females, consequently attitude and performance of males using DEGs should be presumably higher than that of females. This paper reports an investigation of a DEG, which was developed to enhance the acquisition of geographical knowledge, carried out on British, German and Austrian K12 students aged between 11 and 14. Methods include a survey on initial design concepts, user tests on the system and two single-gender focus groups. Gender and cultural differences in gameplay habit, game type preferences and game character perceptions were observed. The results showed that both genders similarly improved their geographical knowledge, although boys tended to have a higher level of positive user experience than the girls. The qualitative data from the focus groups illustrated some interesting gender differences in perceiving various aspects of the game.

Transforming K-12 Rural Education through Blended Learning: Teacher Perspectives

ERIC Educational Resources Information Center

Kellerer, Paula; Kellerer, Eric; Werth, Eric; Werth, Lori; Montgomery, Danielle; Clyde, Rozella; Cozart, Joe; Creach, Laura; Hibbard, Laura; LaFrance, Jason; Rupp, Nadine; Walker, Niki; Carter, Theresa; Kennedy, Kathryn

2014-01-01

A qualitative study exploring rural teacher perspectives on the impact of blended learning on students and teachers was conducted in Idaho during the Fall of 2013. Researchers from Northwest Nazarene University's DOCEO Center in partnership with Idaho Digital Learning Academy (IDLA) and the International Association for K-12 Online Learning…

A 12-bit high-speed column-parallel two-step single-slope analog-to-digital converter (ADC) for CMOS image sensors.

PubMed

Lyu, Tao; Yao, Suying; Nie, Kaiming; Xu, Jiangtao

2014-11-17

A 12-bit high-speed column-parallel two-step single-slope (SS) analog-to-digital converter (ADC) for CMOS image sensors is proposed. The proposed ADC employs a single ramp voltage and multiple reference voltages, and the conversion is divided into coarse phase and fine phase to improve the conversion rate. An error calibration scheme is proposed to correct errors caused by offsets among the reference voltages. The digital-to-analog converter (DAC) used for the ramp generator is based on the split-capacitor array with an attenuation capacitor. Analysis of the DAC's linearity performance versus capacitor mismatch and parasitic capacitance is presented. A prototype 1024 × 32 Time Delay Integration (TDI) CMOS image sensor with the proposed ADC architecture has been fabricated in a standard 0.18 μm CMOS process. The proposed ADC has average power consumption of 128 μW and a conventional rate 6 times higher than the conventional SS ADC. A high-quality image, captured at the line rate of 15.5 k lines/s, shows that the proposed ADC is suitable for high-speed CMOS image sensors.

U.S. Ed-Tech Plan Urges Rethinking in K-12 Schools

ERIC Educational Resources Information Center

Ash, Katie

2010-01-01

The Obama administration urged educators and policymakers last week to embrace a host of digital-learning approaches it says will make K-12 schools better, including putting a computing device in the hands of every student. Guided by an overarching goal set by President Barack Obama to raise national college-completion rates from 40 percent to 60…

33 CFR 273.12 - References.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false References. 273.12 Section 273.12 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE AQUATIC PLANT CONTROL § 273.12 References. (a) Section 302, Pub. L. 89-298, (79 Stat. 1092), Rivers and Harbors...

33 CFR 273.12 - References.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false References. 273.12 Section 273.12 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE AQUATIC PLANT CONTROL § 273.12 References. (a) Section 302, Pub. L. 89-298, (79 Stat. 1092), Rivers and Harbors...

The Necessity of Real-Time: Fact and Fiction in Digital Reference Systems.

ERIC Educational Resources Information Center

Lankes, R. David; Shostack, Pauline

2002-01-01

Discussion of digital reference services and the use of real-time versus asynchronous services such as email focuses on data from the AskERIC digital reference service to demonstrate that asynchronous services are not only useful but may have greater utility than real-time systems. (Author/LRW)

The Learning Preferences of Digital Learners in K-12 Schools in China

ERIC Educational Resources Information Center

Yang, Junfeng; Huang, Ronghuai; Kinshuk

2016-01-01

Students grown up with digital technology and Internet are called digital natives or net generation. All others, who grew up without so much immersion with digital technologies are called digital immigrants. Researchers held different ideas on whether a new generation of learners existed. One of the foci of the debate is on the appropriateness of…

Spacemakers: A Leadership Perspective on Curriculum and the Purpose of K-12 Educational Makerspaces

ERIC Educational Resources Information Center

Harron, Jason R.; Hughes, Joan E.

2018-01-01

This qualitative research study investigated how educational makerspace leaders, whom we refer to as spacemakers, framed the purpose of the makerspace in K-12 education and how makerspaces support school curriculum. Using interviews with twelve K-12 spacemakers, the study found spacemakers were experienced, self-motivated educators. These leaders…

Advanced distributed simulation technology: Digital Voice Gateway Reference Guide

NASA Astrophysics Data System (ADS)

Vanhook, Dan; Stadler, Ed

1994-01-01

The Digital Voice Gateway (referred to as the 'DVG' in this document) transmits and receives four full duplex encoded speech channels over the Ethernet. The information in this document applies only to DVG's running firmware of the version listed on the title page. This document, previously named Digital Voice Gateway Reference Guide, BBN Systems and Technologies Corporation, Cambridge, MA 02138, was revised for revision 2.00. This new revision changes the network protocol used by the DVG, to comply with the SINCGARS radio simulation (For SIMNET 6.6.1). Because of the extensive changes to revision 2.00 a separate document was created rather than supplying change pages.

Soil Science Society of America - K-12 Outreach

NASA Astrophysics Data System (ADS)

Lindbo, David L.; Loynachan, Tom; Mblia, Monday; Robinson, Clay; Chapman, Susan

2013-04-01

The Soil Science Society of America created its K12 Committee in 2006 in part to compliment the Dig It! The Secrets of Soil exhibit that opened in July 2008 at the Smithsonian's Institution's Nation Museum of Natural History (of which SSS was a founding sponsor). The committee's work began quickly with a website designed to provide resources for K12 teachers. The first accomplishments included reviewing and posting links to web based information already available to teachers. These links were sorted by subject and grade level to make it easier for teachers to navigate the web and find what they needed quickly. Several presentations and lessons designed for K12 teachers were also posted at this time. Concurrent with this effort a subcommittee review and organized the national teaching standards to show where soils could fit into the overall K12 curriculum. As the website was being developed another subcommittee developed a soils book (Soil! Get the Inside Scoop, 2008) to further compliment the Dig It! exhibit. This was a new endeavor for SSSA having never worked with the non-academic audience in developing a book. Peer-reviews of this book included not only scientist but also students in order to make sure the book was attractive to them. Once the book was published and the website developed it became clear more outreach was needed. SSSA K12 Committee has attended both the National Science Teachers Association (since 2008) the USA Science and Engineering Festival (since 2010) with exhibits and workshops. It has cooperated and contributed to the American Geologic Institutes' Earth Science Week materials with brochures and lesson plans and with National Association of Conservation Districts by providing peer-review and distribution of materials. The most recent developments from the committee include a web redesign that is more student and teacher friendly, the development of a peer-review system to publish K12 Lesson Plans, and finally the publication of a new soils

K-12 Student Use of Web 2.0 Tools: A Global Study

ERIC Educational Resources Information Center

Toledo, Cheri; Shepard, MaryFriend

2011-01-01

Over the past decade, Internet use has increased 445% worldwide. This boom has enabled widespread access to online tools and digital spaces for educational practices. The results of this study of Web 2.0 tool use in kindergarten through high school (K-12) classrooms around the world will be presented. A web-based survey was sent out through online…

Online Teaching in K-12: Models, Methods, and Best Practices for Teachers and Administrators

ERIC Educational Resources Information Center

Bryans-Bongey, Sarah, Ed.; Graziano, Kevin J., Ed.

2016-01-01

"Online Teaching in K-12" is the essential hands-on reference and textbook for education professionals seeking success in the planning, design, and teaching of K-12 online courses and programs. This skillfully edited book brings together more than two dozen experts and practitioners to present an array of innovative models and methods,…

Scientists Involved in K-12 Education

NASA Astrophysics Data System (ADS)

Robigou, V.

2004-12-01

The publication of countless reports documenting the dismal state of science education in the 1980s, and the Third International Mathematics and Science Study (TIMMS) report (1996) called for a wider involvement of the scientific community in K-12 education and outreach. Improving science education will not happen without the collaboration of educators and scientists working in a coordinated manner and it requires a long-term, continuous effort. To contribute effectively to K-12 education all scientists should refer to the National Science Education Standards, a set of policies that guide the development of curriculum and assessment. Ocean scientists can also specifically refer to the COSEE recommendations (www.cosee.org) that led to the creation of seven regional Centers for Ocean Sciences Education Excellence. Scientists can get involved in K-12 education in a multitude of ways. They should select projects that will accommodate time away from their research and teaching obligations, their talent, and their interest but also contribute to the education reform. A few examples of effective involvement are: 1) collaborating with colleagues in a school of education that can lead to better education of all students and future teachers, 2) acting as a resource for a national program or a local science fair, 3) serving on the advisory board of a program that develops educational material, 4) speaking out at professional meetings about the value of scientists' involvement in education, 5) speaking enthusiastically about the teaching profession. Improving science education in addition to research can seem a large, overwhelming task for scientists. As a result, focusing on projects that will fit the scientist's needs as well as benefit the science reform is of prime importance. It takes an enormous amount of work and financial and personnel resources to start a new program with measurable impact on students. So, finding the right opportunity is a priority, and stepping

A digital reference collection for aquatic macroinvertebrates of North America

USGS Publications Warehouse

Walters, David; Ford, Morgan A; Zuellig, Robert E.

2017-01-01

Aquatic invertebrates are a key component of freshwater ecosystems, and understanding aquatic invertebrate taxonomy is a cornerstone of freshwater science. Physical reference collections of expertly identified voucher specimens are the ‘gold-standard’ used to confirm specimen identifications. However, most biologists lack access to such collections, which themselves tend to be highly regionalized and somewhat limited in terms of taxonomic scope. The North American Aquatic Macroinvertebrate Digital Reference Collection (NAAMDRC; https://sciencebase.usgs.gov/naamdrc) was developed by the US Geological Survey (USGS) to overcome these limitations of physical collections. NAAMDRC provides users with public-domain, high-quality digital photographs to help verify specimen identifications.

An Investigation of Digital Reference Interviews: A Dialogue Act Approach

ERIC Educational Resources Information Center

Inoue, Keisuke

2013-01-01

The rapid increase of computer-mediated communications (CMCs) in various forms such as micro-blogging (e.g. Twitter), online chatting (e.g. digital reference) and community-based question-answering services (e.g. Yahoo! Answers) characterizes a recent trend in web technologies, often referred to as the "social web". This trend highlights…

Technology Counts 2010: Powering Up--Mobile Learning Seeks the Spotlight in K-12 Education

ERIC Educational Resources Information Center

Education Week, 2010

2010-01-01

Much like the shifting landscape in K-12 educational technology, this year's "Technology Counts" issue is changing to address the challenges of covering schools in the digital age. The 2010 report does not issue state report cards or state policy reports. Instead, the report takes a more district- and school-level look at educational…

Characterization of the reference wave in a compact digital holographic camera.

PubMed

Park, I S; Middleton, R J C; Coggrave, C R; Ruiz, P D; Coupland, J M

2018-01-01

A hologram is a recording of the interference between an unknown object wave and a coherent reference wave. Providing the object and reference waves are sufficiently separated in some region of space and the reference beam is known, a high-fidelity reconstruction of the object wave is possible. In traditional optical holography, high-quality reconstruction is achieved by careful reillumination of the holographic plate with the exact same reference wave that was used at the recording stage. To reconstruct high-quality digital holograms the exact parameters of the reference wave must be known mathematically. This paper discusses a technique that obtains the mathematical parameters that characterize a strongly divergent reference wave that originates from a fiber source in a new compact digital holographic camera. This is a lensless design that is similar in principle to a Fourier hologram, but because of the large numerical aperture, the usual paraxial approximations cannot be applied and the Fourier relationship is inexact. To characterize the reference wave, recordings of quasi-planar object waves are made at various angles of incidence using a Dammann grating. An optimization process is then used to find the reference wave that reconstructs a stigmatic image of the object wave regardless of the angle of incidence.

26 CFR 49.4253-12 - Cross reference.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 16 2010-04-01 2010-04-01 true Cross reference. 49.4253-12 Section 49.4253-12 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) MISCELLANEOUS EXCISE TAXES FACILITIES AND SERVICES EXCISE TAXES Communications § 49.4253-12 Cross reference. For exemptions...

Digital Game-Based Learning for K-12 Mathematics Education: A Meta-Analysis

ERIC Educational Resources Information Center

Byun, JaeHwan; Joung, Eunmi

2018-01-01

Digital games (e.g., video games or computer games) have been reported as an effective educational method that can improve students' motivation and performance in mathematics education. This meta-analysis study (a) investigates the current trend of digital game-based learning (DGBL) by reviewing the research studies on the use of DGBL for…

Maine K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 12

ERIC Educational Resources Information Center

DiPerna, Paul

2013-01-01

The "Maine K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Maine registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels and…

Digital Reference Service in the New Millennium: Planning, Management, and Evaluation. The New Library Series, Number 6.

ERIC Educational Resources Information Center

Lankes, R. David, Ed.; Collins, John W., III, Ed.; Kasowitz, Abby S., Ed.

This book on digital reference services begins with an introduction entitled "The Foundations of Digital Reference" (R. David Lankes). Part 1, "The New Reference Culture: Traits and Trends," includes the following papers: "Why Reference Is about To Change Forever (but Not Completely)" (Joseph Janes);…

Reference-free direct digital lock-in method and apparatus

NASA Technical Reports Server (NTRS)

Henry, James E. (Inventor); Leonard, John A. (Inventor)

2000-01-01

A reference-free direct digital lock-in system (RDDL 10) has a first input coupled to a periodic electrical signal and an output for outputting an indication of a magnitude of a desired periodic signal component. The RDDL also has a second input for receiving a signal (9) that specifies a reference period value, and operates to autonomously generate a lock-in reference signal having a specified period and a phase that is adjusted to maximize a magnitude of the outputted desired periodic signal component. In an embodiment of a measurement system that includes the RDDL 10 an optical source provides a chopped light beam having wavelengths within a predetermined range of wavelengths, and the periodic electrical signal is generated by at least one photodetector that is illuminated by the chopped light beam. In this embodiment the measurement system characterizes, for at least one wavelength of light that is generated by the optical source, a spectral response of the at least one photodetector. The RDDL can operate in nonreal-time upon previously generated and stored digital equivalent values of the periodic electrical signal or signals.

Out of Print: Reimagining the K-12 Textbook in a Digital Age

ERIC Educational Resources Information Center

Fletcher, Geoffrey; Schaffhauser, Dian; Levin, Douglas

2012-01-01

Technological innovation is driving fundamental changes in all aspects of our lives. This is especially true of digital content, as our use of e-books, downloadable music, streaming television and movies, and online social networks has exploded. However, the explosive growth in our use of digital content seems so far to have eluded many of the 50…

NASA Lewis' IITA K-12 Program

NASA Technical Reports Server (NTRS)

1996-01-01

The NASA Lewis Research Center's Information Infrastructure Technology and Applications for Kindergarten to 12th Grade (IITA K-12) Program is designed to introduce into school systems computing and communications technology that benefits math and science studies. By incorporating this technology into K-12 curriculums, we hope to increase the proficiency and interest in math and science subjects by K-12 students so that they continue to study technical subjects after their high school careers are over.

Digital Citizenship: You Can't Go Home Again

ERIC Educational Resources Information Center

Hollandsworth, Randy; Donovan, Judy; Welch, Mary

2017-01-01

In the July/August 2011 edition of "TechTrends," a group of AECT members and academic professionals explored the state of digital citizenship for students in K-12 through an article entitled: "Digital Citizenship in K-12: It Takes a Village." Identified was a significant need for digital citizenship awareness by parents,…

Building Bridges for Collaborative Digital Reference between Libraries and Museums through an Examination of Reference in Special Collections

ERIC Educational Resources Information Center

Lavender, Kenneth; Nicholson, Scott; Pomerantz, Jeffrey

2005-01-01

While a growing number of the digital reference services in libraries have become part of collaborative reference networks, other entities that serve similar information-seeking needs such as special collections and museums have not joined these networks, even though they are answering an increasing number of questions from off-site patrons via…

Teaching Online across State Lines. Keeping Pace with K-12 Digital Learning. Policy Brief

ERIC Educational Resources Information Center

Watson, John; Murin, Amy; Pape, Larry

2014-01-01

Among the ways in which states attempt to ensure quality in K-12 education is by requiring that most teachers in public schools be licensed via state-level requirements that vary by state. This patchwork of requirements has not been a problem for most teachers over the last century, because so few teachers taught in multiple states concurrently.…

Pioneering the Digital Age of Instruction: Learning from and about K-12 Online Teachers

ERIC Educational Resources Information Center

Archambault, Leanna; Larson, Jean

2015-01-01

The purpose of this study was threefold: (1) to examine the needs of K-12 online teachers, including the dominant factors and career paths that influenced their decision to teach online; (2) to discover what online teachers viewed as the most important attributes an online teacher must have to be highly effective; and (3) to highlight the nature…

Digital chat reference in health science libraries: challenges in initiating a new service.

PubMed

Dee, Cheryl R; Newhouse, Joshua D

2005-01-01

Digital reference service adds a valuable new dimension to health science reference services, but the road to implementation can present questions that require carefully considered decisions. This article incorporates suggestions from the published literature, provides tips from interviews with practicing academic health science librarians, and reports on data from students' exploration of academic health science library Web sites' digital reference services. The goal of this study is to provide guidelines to plan new services, assess user needs, and select software, and to showcase potential benefits of collaboration and proactive and user-friendly marketing. In addition, tips for successful operation and evaluation of services are discussed.

Academic portfolio in the digital era: organizing and maintaining a portfolio using reference managers.

PubMed

Bhargava, Puneet; Patel, Vatsal B; Iyer, Ramesh S; Moshiri, Mariam; Robinson, Tracy J; Lall, Chandana; Heller, Matthew T

2015-02-01

The academic portfolio has become an integral part of the promotions process. Creating and maintaining an academic portfolio in paper-based or web-based formats can be a cumbersome and time-consuming task. In this article, we describe an alternative way to efficiently organize an academic portfolio using a reference manager software, and discuss some of the afforded advantages. The reference manager software Papers (Mekentosj, Amsterdam, The Netherlands) was used to create an academic portfolio. The article outlines the key steps in creating and maintaining a digital academic portfolio. Using reference manager software (Papers), we created an academic portfolio that allows the user to digitally organize clinical, teaching, and research accomplishments in an indexed library enabling efficient updating, rapid retrieval, and easy sharing. To our knowledge, this is the first digital portfolio of its kind.

Three-Dimensional Imaging by Self-Reference Single-Channel Digital Incoherent Holography

PubMed Central

Rosen, Joseph; Kelner, Roy

2016-01-01

Digital holography offers a reliable and fast method to image a three-dimensional scene from a single perspective. This article reviews recent developments of self-reference single-channel incoherent hologram recorders. Hologram recorders in which both interfering beams, commonly referred to as the signal and the reference beams, originate from the same observed objects are considered as self-reference systems. Moreover, the hologram recorders reviewed herein are configured in a setup of a single channel interferometer. This unique configuration is achieved through the use of one or more spatial light modulators. PMID:28757811

Science Curriculum Resource Handbook: A Practical Guide for K-12 Science Curriculum.

ERIC Educational Resources Information Center

Cheek, Dennis W., Ed.; And Others

This handbook is one of a series of practical references for curriculum developers, education faculty, veteran teachers, and student teachers. The handbook is designed to provide basic information on the background of the science curriculum, and current information on publications, standards, and special materials for K-12 science. Part 1 contains…

Colorado K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 26

ERIC Educational Resources Information Center

DiPerna, Paul

2015-01-01

The purpose of the "Colorado K-12 & School Choice Survey" is to measure public opinion on, and in some cases awareness or knowledge of, a range of K-12 education topics and school choice reforms. A total of 601 telephone interviews were completed from August 29 to September 16, 2015, with questions on the direction of K-12 education,…

Nebraska Science Standards: Grades K-12

ERIC Educational Resources Information Center

Nebraska Department of Education, 2010

2010-01-01

This publication presents the Nebraska Science Standards for Grades K-12. The standards are presented according to the following grades: (1) Grades K-2; (2) Grades 3-5; (3) Grades 6-8; and (4) Grades 9-12.

Comparison of two methods of digital imaging technology for small diameter K-file length determination.

PubMed

Maryam, Ehsani; Farida, Abesi; Farhad, Akbarzade; Soraya, Khafri

2013-11-01

Obtaining the proper working length in endodontic treatment is essential. The aim of this study was to compare the working length (WL) assessment of small diameter K-files using the two different digital imaging methods. The samples for this in-vitro experimental study consisted of 40 extracted single-rooted premolars. After access cavity preparation, the ISO files no. 6, 8, and 10 stainless steel K-files were inserted in the canals in the three different lengths to evaluate the results in a blinded manner: At the level of apical foramen(actual)1 mm short of apical foramen2 mm short of apical foramen A digital caliper was used to measure the length of the files which was considered as the Gold Standard. Five observers (two oral and maxillofacial radiologists and three endodontists) observed the digital radiographs which were obtained using PSP and CCD digital imaging sensors. The collected data were analyzed by SPSS 17 and Repeated Measures Paired T-test. In WL assessment of small diameter K-files, a significant statistical relationship was seen among the observers of two digital imaging techniques (P<0.001). However, no significant difference was observed between the two digital techniques in WL assessment of small diameter K-files (P<0.05). PSP and CCD digital imaging techniques were similar in WL assessment of canals using no. 6, 8, and 10 K-files.

Electro-cutaneous stimulation on the palm elicits referred sensations on intact but not on amputated digits

NASA Astrophysics Data System (ADS)

D'Alonzo, M.; Engels, L. F.; Controzzi, M.; Cipriani, C.

2018-02-01

Objective. Grasping and manipulation control critically depends on tactile feedback. Without this feedback, the ability for fine control of a prosthesis is limited in upper limb amputees. Early studies have shown that non-invasive electro-cutaneous stimulation (ES) can induce referred sensations that are spread to a wider and/or more distant area, with respect to the electrodes. Building on this, we sought to exploit this effect to provide somatotopically matched sensory feedback to people with partial hand (digital) amputations. Approach. For the first time, this work investigated the possibility of inducing referred sensations in the digits by activating the palmar nerves. Specifically, we electrically stimulated 18 sites on the palm of non-amputees to evaluate the effects of sites and stimulation parameters on modality, magnitude, and location of the evoked sensations. We performed similar tests with partial hand amputees by testing those sites that had most consistently elicited referred sensations in non-amputees. Main results. We demonstrated referred sensations in non-amputees from all stimulation sites in one form or another. Specifically, the stimulation of 16 of the 18 sites gave rise to reliable referred sensations. Amputees experienced referred sensations to unimpaired digits, just like non-amputees, but we were unable to evoke referred sensations in their missing digits: none of them reported sensations that extended beyond the tip of the stump. Significance. The possibility of eliciting referred sensations on the digits may be exploited in haptic systems for providing touch sensations without obstructing the fingertips or their movements. The study also suggests that the phenomenon of referred sensations through ES may not be exploited for partial hand prostheses, and it invites researchers to explore alternative approaches. Finally, the results seem to confirm previous studies suggesting that the stumps in partial hand amputees partially acquire the

Can an Electronic Textbooks Be Part of K-12 Education?: Challenges, Technological Solutions and Open Issues

ERIC Educational Resources Information Center

Lee, HeeJeong Jasmine; Messom, Chris; Yau, Kok-Lim Alvin

2013-01-01

An electronic textbook (e-Textbook) is a digitized (or electronic) form of textbook, which normally needs an endorsement by the national or state government when it is used in the K-12 education system. E-Textbooks have been envisioned to replace existing paper-based textbooks due to its educational advantages. Hence, it is of paramount importance…

A Survey of the Usability of Digital Reference Services on Academic Health Science Library Web Sites

ERIC Educational Resources Information Center

Dee, Cheryl; Allen, Maryellen

2006-01-01

Reference interactions with patrons in a digital library environment using digital reference services (DRS) has become widespread. However, such services in many libraries appear to be underutilized. A study surveying the ease and convenience of such services for patrons in over 100 academic health science library Web sites suggests that…

Handbook of Research on Literacy in Technology at the K-12 Level

ERIC Educational Resources Information Center

Hin, Leo Tan Wee, Ed.; Subramaniam, R., Ed.

2006-01-01

The "Handbook of Research on Literacy in Technology at the K-12 Level" is the first reference work to provide comprehensive coverage of the issues, methods, and theories that define the converging worlds of literacy and technology at the pre-collegiate level. Over 50 international experts have combined their research and practical experience into…

Reference values and equations reference of balance for children of 8 to 12 years.

PubMed

Libardoni, Thiele de Cássia; Silveira, Carolina Buzzi da; Sinhorim, Larissa Milani Brognoli; Oliveira, Anamaria Siriani de; Santos, Márcio José Dos; Santos, Gilmar Moraes

2018-02-01

There are still no normative data in balance sway for school-age children in Brazil. We aimed to establish the reference ranges for balance scores and to develop prediction equations for estimation of balance scores in children aged 8 to 12 years old. The study included 165 healthy children (83 boys and 82 girls; age, 8-12 years) recruited from a public school in the city of Florianópolis, Santa Catarina, Brazil. We used the Sensory Organization Test to assess the balance scores and both a digital scale and a stadiometer to measure the anthropometric variables. We tested a stepwise multiple-regression model with sex, height, weight, and mid-thigh circumference of the dominant leg as predictors of the balance score. For all experimental conditions, girls' age accounted for over 85% of the variability in balance scores; while, boys' age accounted only 55% of the variability in balance scores. Therefore, balance scores increase with age for boys and girls. This study described the ranges of age- and sex-specific normative values for balance scores in children during 6 different testing conditions established by the sensory organization test. We confirmed that age was the predictor that best explained the variability in balance scores in children between 8 and 12 years old. This study stimulates a new and more comprehensive study to estimate balance scores from prediction equations for overall Brazilian pediatric population. Copyright © 2017 Elsevier B.V. All rights reserved.

The Second Digital Divide and Its Effect on African-American (K-12) School-Age Children

ERIC Educational Resources Information Center

Barrett, Christopher A.

2010-01-01

The qualitative phenomenological study explored the perceptions of educators and parents of African-American (K-12) school-age children on how the children were using technology. The study was conducted in the Memphis City Public School System (MCS) and was limited to three schools in a school district. Common themes emerged from the analysis of…

Effective Use of Digital Technologies of High School Teachers as Digital Immigrants in Six Rural Public Schools

ERIC Educational Resources Information Center

Pattee, Andy

2012-01-01

Problem: A widening experiential gap of effective use of technology in K-12 schools between "digital immigrants" and "digital natives" (Prensky, 2001) is becoming more evident as digital natives become classroom teachers and showcase pedagogical strategies with digital technologies. There is a dearth of research on digital…

Determining the Accessibility of K-12 Digital Materials: Tools for Educators

ERIC Educational Resources Information Center

Smith, Sean J.; Stahl, William

2016-01-01

This article explores the manner in which teachers and district leaders can further determine whether or not the digital materials they are considering are accessible for all learners--particularly those with disabilities--and appropriate to the accommodations and modifications provided in the brick-and-mortar school environment. The article…

CCQM-K11.2 determination of glucose in human serum and CCQM-K12.2 determination of creatinine in human serum

NASA Astrophysics Data System (ADS)

Wise, Stephen A.; Phinney, Karen W.; Duewer, David L.; Sniegoski, Lorna T.; Welch, Michael J.; Pritchett, Jeanita; Pabello, Guiomar; Avila Calderon, Marco A.; Balderas, Miryan; Qinde, Liu; Kooi, Lee Tong; Rego, Eliane; Garrido, Bruno; Allegri, Gabriella; de La Cruz, Marcia; Barrabin, Juliana; Monteiro, Tânia; Lee, Hwashim; Kim, Byungjoo; Delatour, Vincent; Peignaux, Maryline; Kawaguchi, Migaku; Bei, Xu; Can, Quan; Nammoonnoy, Jintana; Schild, Katrin; Ohlendorf, Rüdiger; Henrion, Andre; Ceyhan Gören, Ahmet; Yılmaz, Hasibe; Bilsel, Mine; Konopelko, L.; Krylov, A.; Lopushanskaya, E.

2018-01-01

Glucose and creatinine are two of the most frequently measured substances in human blood/serum for assessing the health status of individuals. Because of their clinical significance, CCQM-K11 glucose in human serum and CCQM-K12 creatinine in human serum were the fourth and fifth key comparisons (KCs) performed by the Organic Analysis Working Group (OAWG). These KCs were conducted in parallel and were completed in 2001. The initial subsequent KCs for glucose, CCQM-K11.1, and creatinine, CCQM-K12.1, were completed in 2005. Measurements for the next KCs for these two measurands, CCQM-K11.2 and CCQM-K12.2, were completed in 2013. While designed as subsequent KCs, systematic discordances between the participants' and the anchor institution's results in both comparisons lead the OAWG to request reference results from two experienced laboratories that had participated in the 2001 comparisons. Based on the totality of the available information, the OAWG converted both CCQM-K11.2 and CCQM-K12.2 to 'Track C' KCs where the key comparison reference value is estimated by consensus. These comparisons highlighted that carrying out comparisons for complex chemical measurements and expecting to be able to treat them under the approaches used for formal CIPM subsequent comparisons is not an appropriate strategy. The approach used here is a compromise to gain the best value from the comparison; it is not an approach that will be used in the future. Instead, the OAWG will focus on Track A and Track C comparisons that are treated as stand-alone entities. Participation in CCQM-K11.2 demonstrates a laboratory's capabilities to measure a polar (pKow > 2), low molecular mass (100 g/mol to 500 g/mol) metabolite in human serum at relatively high concentrations (0.1 mg/g to 10 mg/g). Participation in CCQM-K12.2 demonstrates capabilities to measure similar classes of metabolites at relatively low concentrations (1 μg/g to 30 μg/g). The capabilities required for the analysis of complex

Comparative analysis of envelope proteomes in Escherichia coli B and K-12 strains.

PubMed

Han, Mee-Jung; Lee, Sang Yup; Hong, Soon Ho

2012-04-01

Recent genome comparisons of E. coli B and K-12 strains have indicated that the makeup of the cell envelopes in these two strains is quite different. Therefore, we analyzed and compared the envelope proteomes of E. coli BL21(DE3) and MG1655. A total of 165 protein spots, including 62 nonredundant proteins, were unambiguously identified by two-dimensional gel electrophoresis and mass spectrometry. Of these, 43 proteins were conserved between the two strains, whereas 4 and 16 strain-specific proteins were identified only in E. coli BL21(DE3) and MG1655, respectively. Additionally, 24 proteins showed more than 2-fold differences in intensities between the B and K-12 strains. The reference envelope proteome maps showed that E. coli envelope mainly contained channel proteins and lipoproteins. Interesting proteomic observations between the two strains were as follows: (i) B produced more OmpF porin with a larger pore size than K-12, indicating an increase in the membrane permeability; (ii) B produced higher amounts of lipoproteins, which facilitates the assembly of outer membrane beta-barrel proteins; and (iii) motility- (FliC) and chemotaxis-related proteins (CheA and CheW) were detected only in K-12, which showed that E. coli B is restricted with regard to migration under unfavorable conditions. These differences may influence the permeability and integrity of the cell envelope, showing that E. coli B may be more susceptible than K-12 to certain stress conditions. Thus, these findings suggest that E. coli K-12 and its derivatives will be more favorable strains in certain biotechnological applications, such as cell surface display or membrane engineering studies.

Art Education Curriculum Guide, K-12.

ERIC Educational Resources Information Center

Naperville Public Schools, IL.

GRADES OR AGES: K-12. SUBJECT MATTER: Art. ORGANIZATION AND PHYSICAL APPEARANCE: The guide is divided into numerous sections, one each for grades K-8, and one section for grades 9-12. Each section is in list form. The guide is mimeographed and spiral-bound with a paper cover. OBJECTIVES AND ACTIVITIES: Each section contains four sample lessons…

Standards for K-12 Engineering Education?

ERIC Educational Resources Information Center

National Academies Press, 2010

2010-01-01

The goal of this study was to assess the value and feasibility of developing and implementing content standards for engineering education at the K-12 level. Content standards have been developed for three disciplines in STEM education--science, technology, and mathematic--but not for engineering. To date, a small but growing number of K-12…

K-12 Education

Science.gov Websites

reached out to elementary and high school students to expose them to earthquakes in a hands-on products laboratories publications nisee b.i.p. members education FAQs links education Education Program Internships K-12 Education Contact the PEER Education Program PEER's Educational Affiliates Student Design

Improving Access To, Quality, and the Effectiveness of Digital Tutoring in K-12 Education

ERIC Educational Resources Information Center

Burch, Patricia; Good, Annalee; Heinrich, Carolyn

2016-01-01

There is considerable variation in how providers of digital education describe what they do, their services, how students access services, and what is delivered, complicating efforts to accurately assess its impact. We examine program characteristics of digital tutoring providers using rich, longitudinal observational and interview data and then…

Idaho K-12 & School Choice Survey: What Do Voters Say about K-12 Education. Polling Paper No. 5

ERIC Educational Resources Information Center

DiPerna, Paul

2012-01-01

The "Idaho K-12 & School Choice Survey" project, commissioned by The Friedman Foundation for Educational Choice and conducted by Braun Research Incorporated (BRI), measures Idaho registered voters' familiarity and views on a range of K-12 education issues and school choice reforms. We report response "levels" and…

What K-12 Leaders Can Learn from Accreditation

ERIC Educational Resources Information Center

Stader, David L.; Munoz, Ava J.; Rowett, Charles

2009-01-01

Community college Quality Enhancement Plans (QEPs) typically focus on improving student outcomes. QEPs are in many ways analogous to the campus improvement plans (CIPs) that have become standard practice for virtually all K-12 schools. K-12 campus and district leaders often seek school improvement ideas from other K-12 districts. However, much can…

Minnesota K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 23

ERIC Educational Resources Information Center

DiPerna, Paul

2015-01-01

The "Minnesota K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Minnesota registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response…

Washington K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 6

ERIC Educational Resources Information Center

DiPerna, Paul

2012-01-01

The "Washington K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research Incorporated (BRI), measures Washington registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report…

Alaska K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 3

ERIC Educational Resources Information Center

DiPerna, Paul

2011-01-01

The "Alaska K-12 & School Choice Survey" project, commissioned by The Friedman Foundation for Educational Choice and conducted by Braun Research Incorporated (BRI), measures Alaska registered voters' familiarity and views on a range of K-12 education issues and school choice reforms. The author and his colleagues report response…

New long-zoom lens for 4K super 35mm digital cameras

NASA Astrophysics Data System (ADS)

Thorpe, Laurence J.; Usui, Fumiaki; Kamata, Ryuhei

2015-05-01

The world of television production is beginning to adopt 4K Super 35 mm (S35) image capture for a widening range of program genres that seek both the unique imaging properties of that large image format and the protection of their program assets in a world anticipating future 4K services. Documentary and natural history production in particular are transitioning to this form of production. The nature of their shooting demands long zoom lenses. In their traditional world of 2/3-inch digital HDTV cameras they have a broad choice in portable lenses - with zoom ranges as high as 40:1. In the world of Super 35mm the longest zoom lens is limited to 12:1 offering a telephoto of 400mm. Canon was requested to consider a significantly longer focal range lens while severely curtailing its size and weight. Extensive computer simulation explored countless combinations of optical and optomechanical systems in a quest to ensure that all operational requests and full 4K performance could be met. The final lens design is anticipated to have applications beyond entertainment production, including a variety of security systems.

K-12 Professional Development at the Harvard Forest LTER

NASA Astrophysics Data System (ADS)

Bennett, K.

2012-12-01

's Phenocam project, a network of near remote sensing digital phenology cameras that send images of forest, shrub, and grassland vegetation cover at more than 130 diverse sites in North America to the digital archives at the University of New Hampshire. Our school district is now part of this network providing a digital image every half hour of the mixed deciduous/ coniferous forest canopy due north from Overlook Middle School in Ashburnham, Massachusetts. As a part of the Phenocam network, students at the K-12 level have expanded the scope of phenological monitoring that is part of the Harvard Forest LTER Schoolyard Ecology Program protocol, Buds, Leaves, and Global Warming. I have developed a series of lessons comparing student data to phenology data derived from Phenocam network images and Modis satellites. The Phenocam Project and the RET program is supported by NASA.

Delaware K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 21

ERIC Educational Resources Information Center

DiPerna, Paul

2014-01-01

The "Delaware K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Delaware registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels…

Nevada K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 22

ERIC Educational Resources Information Center

DiPerna, Paul

2015-01-01

The "Nevada K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Nevada registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels and…

Texas K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 14

ERIC Educational Resources Information Center

DiPerna, Paul

2013-01-01

The "Texas K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Texas registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels and…

Missouri K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 19

ERIC Educational Resources Information Center

DiPerna, Paul

2014-01-01

The "Missouri K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Missouri registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels…

Oklahoma K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 18

ERIC Educational Resources Information Center

DiPerna, Paul

2014-01-01

The "Oklahoma K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Oklahoma registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels…

Montana K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 10

ERIC Educational Resources Information Center

DiPerna, Paul

2012-01-01

The "Montana K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures Montana registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels…

Louisiana K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 7

ERIC Educational Resources Information Center

DiPerna, Paul

2012-01-01

The "Louisiana K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research Incorporated (BRI), measures Louisiana registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. In this paper the author and his colleagues…

Tennessee K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 9

ERIC Educational Resources Information Center

DiPerna, Paul

2012-01-01

The "Tennessee K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research Inc. (BRI), measures Tennessee registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response levels…

Indiana K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper No. 27

ERIC Educational Resources Information Center

DiPerna, Paul

2016-01-01

The purpose of the "Indiana K-12 & School Choice Survey" is to measure public opinion on, and in some cases awareness or knowledge of, a range of K-12 education topics and school choice reforms. The Friedman Foundation for Educational Choice developed this project in partnership with Braun Research, Inc., who conducted the live phone…

References and benchmarks for pore-scale flow simulated using micro-CT images of porous media and digital rocks

NASA Astrophysics Data System (ADS)

Saxena, Nishank; Hofmann, Ronny; Alpak, Faruk O.; Berg, Steffen; Dietderich, Jesse; Agarwal, Umang; Tandon, Kunj; Hunter, Sander; Freeman, Justin; Wilson, Ove Bjorn

2017-11-01

We generate a novel reference dataset to quantify the impact of numerical solvers, boundary conditions, and simulation platforms. We consider a variety of microstructures ranging from idealized pipes to digital rocks. Pore throats of the digital rocks considered are large enough to be well resolved with state-of-the-art micro-computerized tomography technology. Permeability is computed using multiple numerical engines, 12 in total, including, Lattice-Boltzmann, computational fluid dynamics, voxel based, fast semi-analytical, and known empirical models. Thus, we provide a measure of uncertainty associated with flow computations of digital media. Moreover, the reference and standards dataset generated is the first of its kind and can be used to test and improve new fluid flow algorithms. We find that there is an overall good agreement between solvers for idealized cross-section shape pipes. As expected, the disagreement increases with increase in complexity of the pore space. Numerical solutions for pipes with sinusoidal variation of cross section show larger variability compared to pipes of constant cross-section shapes. We notice relatively larger variability in computed permeability of digital rocks with coefficient of variation (of up to 25%) in computed values between various solvers. Still, these differences are small given other subsurface uncertainties. The observed differences between solvers can be attributed to several causes including, differences in boundary conditions, numerical convergence criteria, and parameterization of fundamental physics equations. Solvers that perform additional meshing of irregular pore shapes require an additional step in practical workflows which involves skill and can introduce further uncertainty. Computation times for digital rocks vary from minutes to several days depending on the algorithm and available computational resources. We find that more stringent convergence criteria can improve solver accuracy but at the expense

K-12 Aerospace Education Programs

NASA Technical Reports Server (NTRS)

1999-01-01

NASA, the United States Air Force Academy, the Air Force Space Command, the University of Colorado at Colorado Springs (UCCS), and the United States Space Foundation teamed to produce a dynamic and successful graduate course and in-service program for K-12 educators that has a positive impact on education trends across the nation. Since 1986, more than 10,000 educators from across the United States have participated in Space Discovery and Teaching with Space affecting nearly a million students in grades K-12. The programs are designed to prepare educators to use the excitement of space to motivate students in all curriculum subjects.

Nucleoli in human early erythroblasts (K2, K1, K1/2 cells).

PubMed

Smetana, K; Jirásková, I; Klamová, H

2005-01-01

Human early erythroid precursors classified according to the nuclear size were studied to provide information on nucleoli in these cells using simple cytochemical procedures for demonstration of RNA and proteins of silver-stained nucleolar organizers. K2 cells with nuclear diameter larger than 13 microm and K1 cells with nuclear diameter larger than 9 microm corresponding to proerythroblasts and macroblasts (large basophilic erythroblasts) mostly possessed large irregularly shaped nucleoli with multiple fibrillar centres representing "active nucleoli". K1/2 cells with nuclear diameter smaller than 9 microm corresponding to small basophilic erythroblasts were usually characterized by the presence of micronucleoli representing "inactive nucleolar types". On the other hand, a few K1/2 cells contained large nucleoli with multiple fibrillar centres similar to those present in K2 cells and thus appeared as "microproerythroblasts". The nucleolar asynchrony expressed by the presence of large irregularly shaped nucleoli with multiple nucleoli (active nucleoli) and ring-shaped nucleoli (resting nucleoli) in one and the same nucleus of K2 or K1 cells was not exceptional and might reflect a larger resistance of these cells to negative factors influencing the erythropoiesis. The intranucleolar translocation of silver-stained nucleolus organized regions was noted in K2 cells and might indicate the premature aging of these cells without further differentiation. More studies, however, are required in this direction.

New system for digital to analog transformation and reconstruction of 12-lead ECGs.

PubMed

Kothadia, Roshni; Kulecz, Walter B; Kofman, Igor S; Black, Adam J; Grier, James W; Schlegel, Todd T

2013-01-01

We describe initial validation of a new system for digital to analog conversion (DAC) and reconstruction of 12-lead ECGs. The system utilizes an open and optimized software format with a commensurately optimized DAC hardware configuration to accurately reproduce, from digital files, the original analog electrocardiographic signals of previously instrumented patients. By doing so, the system also ultimately allows for transmission of data collected on one manufacturer's 12-lead ECG hardware/software into that of any other. To initially validate the system, we compared original and post-DAC re-digitized 12-lead ECG data files (∼5-minutes long) in two types of validation studies in 10 patients. The first type quantitatively compared the total waveform voltage differences between the original and re-digitized data while the second type qualitatively compared the automated electrocardiographic diagnostic statements generated by the original versus re-digitized data. The grand-averaged difference in root mean squared voltage between the original and re-digitized data was 20.8 µV per channel when re-digitization involved the same manufacturer's analog to digital converter (ADC) as the original digitization, and 28.4 µV per channel when it involved a different manufacturer's ADC. Automated diagnostic statements generated by the original versus reconstructed data did not differ when using the diagnostic algorithm from the same manufacturer on whose device the original data were collected, and differed only slightly for just 1 of 10 patients when using a third-party diagnostic algorithm throughout. Original analog 12-lead ECG signals can be reconstructed from digital data files with accuracy sufficient for clinical use. Such reconstructions can readily enable automated second opinions for difficult-to-interpret 12-lead ECGs, either locally or remotely through the use of dedicated or cloud-based servers.

New System for Digital to Analog Transformation and Reconstruction of 12-Lead ECGs

PubMed Central

Kothadia, Roshni; Kulecz, Walter B.; Kofman, Igor S.; Black, Adam J.; Grier, James W.; Schlegel, Todd T.

2013-01-01

Introduction We describe initial validation of a new system for digital to analog conversion (DAC) and reconstruction of 12-lead ECGs. The system utilizes an open and optimized software format with a commensurately optimized DAC hardware configuration to accurately reproduce, from digital files, the original analog electrocardiographic signals of previously instrumented patients. By doing so, the system also ultimately allows for transmission of data collected on one manufacturer's 12-lead ECG hardware/software into that of any other. Materials and Methods To initially validate the system, we compared original and post-DAC re-digitized 12-lead ECG data files (∼5-minutes long) in two types of validation studies in 10 patients. The first type quantitatively compared the total waveform voltage differences between the original and re-digitized data while the second type qualitatively compared the automated electrocardiographic diagnostic statements generated by the original versus re-digitized data. Results The grand-averaged difference in root mean squared voltage between the original and re-digitized data was 20.8 µV per channel when re-digitization involved the same manufacturer's analog to digital converter (ADC) as the original digitization, and 28.4 µV per channel when it involved a different manufacturer's ADC. Automated diagnostic statements generated by the original versus reconstructed data did not differ when using the diagnostic algorithm from the same manufacturer on whose device the original data were collected, and differed only slightly for just 1 of 10 patients when using a third-party diagnostic algorithm throughout. Conclusion Original analog 12-lead ECG signals can be reconstructed from digital data files with accuracy sufficient for clinical use. Such reconstructions can readily enable automated second opinions for difficult-to-interpret 12-lead ECGs, either locally or remotely through the use of dedicated or cloud-based servers. PMID:23613787

Comparison of the large-scale periplasmic proteomes of the Escherichia coli K-12 and B strains.

PubMed

Han, Mee-Jung; Kim, Jin Young; Kim, Jung A

2014-04-01

Escherichia coli typically secretes many proteins into the periplasmic space, and the periplasmic proteins have been used for the secretory production of various proteins by the biotechnology industry. However, the identity of all of the E. coli periplasmic proteins remains unknown. Here, high-resolution periplasmic proteome reference maps of the E. coli K-12 and B strains were constructed and compared. Of the 145 proteins identified by tandem mass spectrometry, 61 proteins were conserved in the two strains, whereas 11 and 12 strain-specific proteins were identified for the E. coli K-12 and B strains, respectively. In addition, 27 proteins exhibited differences in intensities greater than 2-fold between the K-12 and B strains. The periplasmic proteins MalE and OppA were the most abundant proteins in the two E. coli strains. Distinctive differences between the two strains included several proteins that were caused by genetic variations, such as CybC, FliC, FliY, KpsD, MglB, ModA, and Ybl119, hydrolytic enzymes, particularly phosphatases, glycosylases, and proteases, and many uncharacterized proteins. Compared to previous studies, the localization of many proteins, including 30 proteins for the K-12 strain and 53 proteins for the B strain, was newly identified as periplasmic. This study identifies the largest number of proteins in the E. coli periplasm as well as the dynamics of these proteins. Additionally, these findings are summarized as reference proteome maps that will be useful for studying protein secretion and may provide new strategies for the enhanced secretory production of recombinant proteins. Copyright © 2013. Published by Elsevier B.V.

12 CFR 404.3 - Public reference facilities.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Public reference facilities. 404.3 Section 404.3 Banks and Banking EXPORT-IMPORT BANK OF THE UNITED STATES INFORMATION DISCLOSURE Procedures for Disclosure of Records Under the Freedom of Information Act. § 404.3 Public reference facilities. Ex-Im Bank...

A 1024×768-12μm Digital ROIC for uncooled microbolometer FPAs

NASA Astrophysics Data System (ADS)

Eminoglu, Selim

2017-02-01

This paper reports the development of a new digital microbolometer Readout Integrated Circuit (D-ROIC), called MT10212BD. It has a format of 1024 × 768 (XGA) and a pixel pitch of 12μm. MT10212BD is Mikro Tasarim's second 12μm pitch microbolometer ROIC, which is developed specifically for surface micro machined microbolometer detector arrays with small pixel pitch using high-TCR pixel materials, such as VOx and a Si. MT10212BD has an alldigital system on-chip architecture, which generates programmable timing and biasing, and performs 14-bit analog to digital conversion (ADC). The signal processing chain in the ROIC is composed of pixel bias circuitry, integrator based programmable gain amplifier followed by column parallel ADC circuitry. MT10212BD has a serial programming interface that can be used to configure the programmable ROIC features and to load the Non-Uniformity-Correction (NUC) date to the ROIC. MT10212BD has a total of 8 high-speed serial digital video outputs, which can be programmed to operate in the 2, 4, and 8-output modes and can support frames rates above 60 fps. The high-speed serial digital outputs supports data rates as high as 400 Mega-bits/s, when operated at 50 MHz system clock frequency. There is an on-chip phase-locked-loop (PLL) based timing circuitry to generate the high speed clocks used in the ROIC. The ROIC is designed to support pixel resistance values ranging from 30KΩ to 90kΩ, with a nominal value of 60KΩ. The ROIC has a globally programmable gain in the column readout, which can be adjusted based on the detector resistance value.

K-12 Educational Outcomes of Immigrant Youth

ERIC Educational Resources Information Center

Crosnoe, Robert; Turley, Ruth N. Lopez

2011-01-01

The children from immigrant families in the United States make up a historically diverse population, and they are demonstrating just as much diversity in their experiences in the K-12 educational system. Robert Crosnoe and Ruth Lopez Turley summarize these K-12 patterns, paying special attention to differences in academic functioning across…

North Dakota K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 13

ERIC Educational Resources Information Center

DiPerna, Paul

2013-01-01

The "North Dakota K-12 & School Choice Survey" project, commissioned by the Friedman Foundation for Educational Choice and conducted by Braun Research, Inc. (BRI), measures North Dakota registered voters' familiarity and views on a range of K-12 education topics and school choice reforms. The author and his colleagues report response…

New Mexico K-12 & School Choice Survey: What Do Voters Say about K-12 Education? Polling Paper Number 4

ERIC Educational Resources Information Center

DiPerna, Paul

2011-01-01

The "New Mexico K-12 & School Choice Survey" project, commissioned by The Friedman Foundation for Educational Choice and conducted by Braun Research Incorporated (BRI), measures New Mexico voters' familiarity and views on a range of K-12 education issues and school choice reforms. The author and his colleagues report response…

K12 Online School Practice in China

ERIC Educational Resources Information Center

Chen, Li; Wang, Nan; Qiao, Ailing

2009-01-01

Purpose: The purpose of this paper is two fold. First, it presents the developmental stages and running modes of K12 Online Schools in China. Second, it illustrates online education practice, its current status, and the use of ICT in online schools. The experiences and lessons learned from the development of the K12 Online Schools are presented,…

Economics in the School Curriculum, K-12.

ERIC Educational Resources Information Center

Schug, Mark C., Ed.

Intended to help economics educators in grades K-12 foster in students the thinking skills and substantive economic knowledge necessary to become effective and participating citizens, this book is organized around four themes. Part I presents an introduction by Mark C. Schug and a section on "The Current Status of Economics in the K-12 Curriculum"…

K-12 Neuroscience Education Outreach Program: Interactive Activities for Educating Students about Neuroscience

PubMed Central

Deal, Alex L.; Erickson, Kristen J.; Bilsky, Edward J.; Hillman, Susan J.; Burman, Michael A.

2014-01-01

The University of New England’s Center for Excellence in the Neurosciences has developed a successful and growing K-12 outreach program that incorporates undergraduate and graduate/professional students. The program has several goals, including raising awareness about fundamental issues in neuroscience, supplementing science education in area schools and enhancing undergraduate and graduate/professional students’ academic knowledge and skill set. The outreach curriculum is centered on core neuroscience themes including: Brain Safety, Neuroanatomy, Drugs of Abuse and Addiction, Neurological and Psychiatric Disorders, and Cognition and Brain Function. For each theme, lesson plans were developed based upon interactive, small-group activities. Additionally, we’ve organized our themes in a “Grow-up, Grow-out” approach. Grow-up refers to returning to a common theme, increasing in complexity as we revisit students from early elementary through high school. Grow-out refers to integrating other scientific fields into our lessons, such as the chemistry of addiction, the physics of brain injury and neuronal imaging. One of the more successful components of our program is our innovative team-based model of curriculum design. By creating a team of undergraduate, graduate/professional students and faculty, we create a unique multi-level mentoring opportunity that appears to be successful in enhancing undergraduate students’ skills and knowledge. Preliminary assessments suggest that undergraduates believe they are enhancing their content knowledge and professional skills through our program. Additionally, we’re having a significant, short-term impact on K-12 interest in science. Overall, our program appears to be enhancing the academic experience of our undergraduates and exciting K-12 students about the brain and science in general. PMID:25565921

K-12 Neuroscience Education Outreach Program: Interactive Activities for Educating Students about Neuroscience.

PubMed

Deal, Alex L; Erickson, Kristen J; Bilsky, Edward J; Hillman, Susan J; Burman, Michael A

2014-01-01

The University of New England's Center for Excellence in the Neurosciences has developed a successful and growing K-12 outreach program that incorporates undergraduate and graduate/professional students. The program has several goals, including raising awareness about fundamental issues in neuroscience, supplementing science education in area schools and enhancing undergraduate and graduate/professional students' academic knowledge and skill set. The outreach curriculum is centered on core neuroscience themes including: Brain Safety, Neuroanatomy, Drugs of Abuse and Addiction, Neurological and Psychiatric Disorders, and Cognition and Brain Function. For each theme, lesson plans were developed based upon interactive, small-group activities. Additionally, we've organized our themes in a "Grow-up, Grow-out" approach. Grow-up refers to returning to a common theme, increasing in complexity as we revisit students from early elementary through high school. Grow-out refers to integrating other scientific fields into our lessons, such as the chemistry of addiction, the physics of brain injury and neuronal imaging. One of the more successful components of our program is our innovative team-based model of curriculum design. By creating a team of undergraduate, graduate/professional students and faculty, we create a unique multi-level mentoring opportunity that appears to be successful in enhancing undergraduate students' skills and knowledge. Preliminary assessments suggest that undergraduates believe they are enhancing their content knowledge and professional skills through our program. Additionally, we're having a significant, short-term impact on K-12 interest in science. Overall, our program appears to be enhancing the academic experience of our undergraduates and exciting K-12 students about the brain and science in general.

Direct-to-digital holography reduction of reference hologram noise and fourier space smearing

DOEpatents

Voelkl, Edgar

2006-06-27

Systems and methods are described for reduction of reference hologram noise and reduction of Fourier space smearing, especially in the context of direct-to-digital holography (off-axis interferometry). A method of reducing reference hologram noise includes: recording a plurality of reference holograms; processing the plurality of reference holograms into a corresponding plurality of reference image waves; and transforming the corresponding plurality of reference image waves into a reduced noise reference image wave. A method of reducing smearing in Fourier space includes: recording a plurality of reference holograms; processing the plurality of reference holograms into a corresponding plurality of reference complex image waves; transforming the corresponding plurality of reference image waves into a reduced noise reference complex image wave; recording a hologram of an object; processing the hologram of the object into an object complex image wave; and dividing the complex image wave of the object by the reduced noise reference complex image wave to obtain a reduced smearing object complex image wave.

Understanding and Improving Full-Time Virtual Schools: A Study of Student Characteristics, School Finance, and School Performance in Schools Operated by K12 Inc. [with Appendices

ERIC Educational Resources Information Center

Miron, Gary; Urschel, Jessica L.

2012-01-01

K12 Inc. enrolls more public school students than any other private education management organization in the U.S. Much has been written about K12 Inc. (referred to in this report simply as "K12") by financial analysts and investigative journalists because it is a large, publicly traded company and is the dominant player in the operation…

Digital Booktalk: Digital Media for Reluctant Readers

ERIC Educational Resources Information Center

Gunter, Glenda; Kenny, Robert

2008-01-01

New learning and communications paradigms of today's learners are extending the definition of literacy and directly affecting how reading and writing skills are acquired (Leu, 2000). Mirroring an ever-expanding definition of literacy, new college and K-12 curricular programs that redefine digital media are popping up all over the country. Story is…

K-12 Art Guide.

ERIC Educational Resources Information Center

Furney, Trudy; And Others

The development of students in various art fields is the focus of this K-12 art curriculum guide. The philosophy of the art program and the roles of administrator, teacher, and parent are outlined. The underlying school community relationships, and the objective, goals, and purposes of art education are described. Phases of child development in…

Learning to Teach in the Digital Age: New Materialities and Maker Paradigms in Schools. New Literacies and Digital Epistemologies

ERIC Educational Resources Information Center

Justice, Sean

2016-01-01

"Learning to Teach in the Digital Age" tells the story of a group of K-12 teachers as they began to connect with digital making and learning pedagogies. Guiding questions at the heart of this qualitative case study asked how teaching practices engaged with and responded to the maker movement and digital making and learning tools and…

Laboratory Safety Guide for Arkansas K-12 Schools.

ERIC Educational Resources Information Center

Arkansas State Dept. of Education, Little Rock.

This document presents laboratory safety rules for Arkansas K-12 schools which were developed by the Arkansas Science Teachers Association (ASTA) and the Arkansas Department of Education (ADE). Contents include: (1) "Laboratory Safety Guide for Arkansas K-12 Schools"; (2) "Safety Considerations"; (3) "Safety Standards for Science Laboratories";…

Accuracy of five intraoral scanners compared to indirect digitalization.

PubMed

Güth, Jan-Frederik; Runkel, Cornelius; Beuer, Florian; Stimmelmayr, Michael; Edelhoff, Daniel; Keul, Christine

2017-06-01

Direct and indirect digitalization offer two options for computer-aided design (CAD)/ computer-aided manufacturing (CAM)-generated restorations. The aim of this study was to evaluate the accuracy of different intraoral scanners and compare them to the process of indirect digitalization. A titanium testing model was directly digitized 12 times with each intraoral scanner: (1) CS 3500 (CS), (2) Zfx Intrascan (ZFX), (3) CEREC AC Bluecam (BLU), (4) CEREC AC Omnicam (OC) and (5) True Definition (TD). As control, 12 polyether impressions were taken and the referring plaster casts were digitized indirectly with the D-810 laboratory scanner (CON). The accuracy (trueness/precision) of the datasets was evaluated by an analysing software (Geomagic Qualify 12.1) using a "best fit alignment" of the datasets with a highly accurate reference dataset of the testing model, received from industrial computed tomography. Direct digitalization using the TD showed the significant highest overall "trueness", followed by CS. Both performed better than CON. BLU, ZFX and OC showed higher differences from the reference dataset than CON. Regarding the overall "precision", the CS 3500 intraoral scanner and the True Definition showed the best performance. CON, BLU and OC resulted in significantly higher precision than ZFX did. Within the limitations of this in vitro study, the accuracy of the ascertained datasets was dependent on the scanning system. The direct digitalization was not superior to indirect digitalization for all tested systems. Regarding the accuracy, all tested intraoral scanning technologies seem to be able to reproduce a single quadrant within clinical acceptable accuracy. However, differences were detected between the tested systems.

Reference to Self and Other in the Digital Public Sphere: The Case of Political Blogs

ERIC Educational Resources Information Center

De Cock, Barbara; González Arias, Cristian

2018-01-01

In this paper, we analyze how a political blog author (Spanish Alejo Vidal-Quadras) establishes the reference to self and other in his blog entries. We furthermore look into how the commentators to this blog react and establish reference to self and other in the digital public sphere. More concretely, we show that they not only take up the…

Keeping Pace with K-12 Online Learning, 2016

ERIC Educational Resources Information Center

Gemin, Butch; Pape, Larry

2017-01-01

"Keeping Pace with K-12 Online Learning 2016" marks the thirteenth consecutive year Evergreen has published its annual research of the K-12 education online learning market. The thirteen years of researching, writing and publishing this report represents a time of remarkable change. There has been a constant presence that has become the…

Retaining K-12 Online Teachers: A Predictive Model for K-12 Online Teacher Turnover

ERIC Educational Resources Information Center

Larkin, Ingle M.; Lokey-Vega, Anissa; Brantley-Dias, Laurie

2018-01-01

The purpose of this study was to measure and explore factors influencing K-12 online teachers' turnover intentions, with job satisfaction and organizational commitment serving as moderating variables. Using Fishbein and Ajzen's Theory of Reasoned Action and Planned Behavior (1975), this study was conducted in public, private, charter, for-profit,…

Rethinking Museums' Adult Education for K-12 Teachers

ERIC Educational Resources Information Center

Marcus, Alan S.

2008-01-01

This article explores the importance of developing strong adult education programs within a broader collaborative effort between museum staff and K-12 teachers. Focusing on history museums, the first section discusses the importance of museum visits for K-12 history learning and how we need to reconsider some of the primary purposes for these…

Identification of Evaluated, Exemplary Activities in Career Education (K-12). Executive Summary of Final Technical Report.

ERIC Educational Resources Information Center

Hamilton, Jack A.; Mitchell, Anita M.

A study was conducted to identify and describe evaluated, exemplary activities in career education (K-12) which represent the best of the current career education programs and practices referred to in Public Law 93-380. The major tasks of the study were to: (1) establish criteria for identifying evaluated, exemplary activities; (2) search for…

Temporal dissection of K-ras(G12D) mutant in vitro and in vivo using a regulatable K-ras(G12D) mouse allele.

PubMed

Wang, Zuoyun; Feng, Yan; Bardeesy, Nabeel; Bardessy, Nabeel; Wong, Kwok-Kin; Liu, Xin-Yuan; Ji, Hongbin

2012-01-01

Animal models which allow the temporal regulation of gene activities are valuable for dissecting gene function in tumorigenesis. Here we have constructed a conditional inducible estrogen receptor-K-ras(G12D) (ER-K-ras(G12D)) knock-in mice allele that allows us to temporally switch on or off the activity of K-ras oncogenic mutant through tamoxifen administration. In vitro studies using mice embryonic fibroblast (MEF) showed that a dose of tamoxifen at 0.05 µM works optimally for activation of ER-K-ras(G12D) independent of the gender status. Furthermore, tamoxifen-inducible activation of K-ras(G12D) promotes cell proliferation, anchor-independent growth, transformation as well as invasion, potentially via activation of downstream MAPK pathway and cell cycle progression. Continuous activation of K-ras(G12D) in vivo by tamoxifen treatment is sufficient to drive the neoplastic transformation of normal lung epithelial cells in mice. Tamoxifen withdrawal after the tumor formation results in apoptosis and tumor regression in mouse lungs. Taken together, these data have convincingly demonstrated that K-ras mutant is essential for neoplastic transformation and this animal model may provide an ideal platform for further detailed characterization of the role of K-ras oncogenic mutant during different stages of lung tumorigenesis.

Digital Collections, Digital Libraries & the Digitization of Cultural Heritage Information.

ERIC Educational Resources Information Center

Lynch, Clifford

2002-01-01

Discusses digital collections and digital libraries. Topics include broadband availability; digital rights protection; content, both non-profit and commercial; digitization of cultural content; sustainability; metadata harvesting protocol; infrastructure; authorship; linking multiple resources; data mining; digitization of reference works;…

State of the Nation: K-12 Online Learning in Canada

ERIC Educational Resources Information Center

Barbour, Michael K.

2009-01-01

The goal of the initial "Snapshot State of the Nation: K-12 Online Learning in Canada" report was to provide an overview of the state of K-12 online learning in Canada. This was accomplished through the use of short commentaries about the state of K-12 distance education for each province and territory, along with more developed case…

Scientists and K-12: Experience from The Science House

NASA Astrophysics Data System (ADS)

Haase, David G.

2003-03-01

In working with K-12 science and mathematics education, scientists may take on many different roles - from presenter to full-time partner. These roles are illustrated in the activities of The Science House, a K-12 education program of North Carolina State University, (www.science-house.org) which partners with teachers and students across the state to promote inquiry-based learning in mathematics and science. While it is important to involve scientists in K-12, most universities do not have effective means to make the connections. In our efforts to do so, which began with a few teacher workshops and now encompasses six offices across NC, we have sought to join the interests of the university (research, teaching, student recruiting) to the needs of K-12. Our programs now include teacher training workshops, student science camps and curriculum projects in several states. We are reminded that K-12 science education is interdisciplinary; local and political; and a process, not a problem to be solved and forgotten. Partially supported by NSF (CHE-9876674 and DBI-0115462), the Howard Hughes Medical Institute and the Burroughs Wellcome Fund.

Reflecting on Progress in K-12 Dance Education

ERIC Educational Resources Information Center

Callahan-Russell, Colleen

2004-01-01

Dance as an art form is transformational to body, mind, and spirit. The author opines that public education would do just fine if dance was the "only" subject taught. This article presents the author's reflection on progress of dance in K-12 education. The author contends that progress in dance in K-12 education can perhaps be judged by the fact…

Validation of no-reference image quality index for the assessment of digital mammographic images

NASA Astrophysics Data System (ADS)

de Oliveira, Helder C. R.; Barufaldi, Bruno; Borges, Lucas R.; Gabarda, Salvador; Bakic, Predrag R.; Maidment, Andrew D. A.; Schiabel, Homero; Vieira, Marcelo A. C.

2016-03-01

To ensure optimal clinical performance of digital mammography, it is necessary to obtain images with high spatial resolution and low noise, keeping radiation exposure as low as possible. These requirements directly affect the interpretation of radiologists. The quality of a digital image should be assessed using objective measurements. In general, these methods measure the similarity between a degraded image and an ideal image without degradation (ground-truth), used as a reference. These methods are called Full-Reference Image Quality Assessment (FR-IQA). However, for digital mammography, an image without degradation is not available in clinical practice; thus, an objective method to assess the quality of mammograms must be performed without reference. The purpose of this study is to present a Normalized Anisotropic Quality Index (NAQI), based on the Rényi entropy in the pseudo-Wigner domain, to assess mammography images in terms of spatial resolution and noise without any reference. The method was validated using synthetic images acquired through an anthropomorphic breast software phantom, and the clinical exposures on anthropomorphic breast physical phantoms and patient's mammograms. The results reported by this noreference index follow the same behavior as other well-established full-reference metrics, e.g., the peak signal-to-noise ratio (PSNR) and structural similarity index (SSIM). Reductions of 50% on the radiation dose in phantom images were translated as a decrease of 4dB on the PSNR, 25% on the SSIM and 33% on the NAQI, evidencing that the proposed metric is sensitive to the noise resulted from dose reduction. The clinical results showed that images reduced to 53% and 30% of the standard radiation dose reported reductions of 15% and 25% on the NAQI, respectively. Thus, this index may be used in clinical practice as an image quality indicator to improve the quality assurance programs in mammography; hence, the proposed method reduces the subjectivity

The Practical Application of E-Portfolios in K-12 Classrooms: An Exploration of Three Web 2.0 Tools by Three Teachers

ERIC Educational Resources Information Center

Karlin, Michael; Ozogul, Gamze; Miles, Stacy; Heide, Saul

2016-01-01

Portfolios used in K-12 classrooms give students the opportunity to collect, showcase, and reflect upon the work they have completed throughout a class or program. With the advent of the digital age, e-portfolios have allowed for this process to be conducted online through the use of Web 2.0 tools, offering a number of advantages and features that…

77 FR 66462 - Proposed CERCLA Settlement Relating to the Digital Equipment Corp. Site a/k/a the PCB Horizon...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-05

... ENVIRONMENTAL PROTECTION AGENCY [FRL-9748-6] Proposed CERCLA Settlement Relating to the Digital Equipment Corp. Site a/k/a the PCB Horizon Site in San German, PR AGENCY: Environmental Protection Agency... Digital Equipment Corp. Superfund Site, a/k/a the PCB Horizon Site (``Site''), located in San German...

NSF GK-12 Fellows as Mentors for K-12 Teachers Participating in Field Research Experiences

NASA Astrophysics Data System (ADS)

Ellins, K.; Perry, E.

2005-12-01

The University of Texas Institute for Geophysics (UTIG) recognizes the value of providing educational opportunities to K-12 teachers who play a critical role in shaping the minds of young people who are the future of our science. To that end, UTIG established the "Texas Teachers in the Field" program in 2000 to formalize the participation of K-12 teachers in field programs that included UTIG scientists. In 2002, "Texas Teachers in the Field" evolved through UTIG's involvement in a University of Texas at Austin GK-12 project led by the Environmental Sciences Institute, which enabled UTIG to partner a subset of GK-12 Fellows with teachers participating in geophysical field programs. During the three years of the GK-12 project, UTIG successfully partnered four GK-12 Fellows with five K-12 teachers. The Fellows served as mentors to the teachers, as liaisons between UTIG scientists leading field programs and teachers and their students, and as resources in science, mathematics, and technology instruction. Specifically, Fellows prepared teachers and their students for the field investigations, supervised the design of individual Teacher Research Experience (TRE) projects, and helped teachers to develop standards-aligned curriculum resources related to the field program for use in their own classrooms, as well as broader distribution. Although all but one TRE occurred during the school year, Texas school districts and principals were willing to release teachers to participate because the experience and destinations were so extraordinary (i.e., a land-based program in Tierra del Fuego, Argentina; and research cruises to the Southeast Caribbean Sea and Hess Deep in the Pacific Ocean) and carried opportunities to work with scientists from around the world. This exceptional collaboration of GK-12 Fellows, K-12 teachers and research scientists enriches K-12 student learning and promotes greater enthusiasm for science. The level of mentoring, preparation and follow-up provided

Information Infrastructure Technology and Applications (IITA) Program: Annual K-12 Workshop

NASA Technical Reports Server (NTRS)

Hunter, Paul; Likens, William; Leon, Mark

1995-01-01

The purpose of the K-12 workshop is to stimulate a cross pollination of inter-center activity and introduce the regional centers to curing edge K-1 activities. The format of the workshop consists of project presentations, working groups, and working group reports, all contained in a three day period. The agenda is aggressive and demanding. The K-12 Education Project is a multi-center activity managed by the Information Infrastructure Technology and Applications (IITA)/K-12 Project Office at the NASA Ames Research Center (ARC). this workshop is conducted in support of executing the K-12 Education element of the IITA Project The IITA/K-12 Project funds activities that use the National Information Infrastructure (NII) (e.g., the Internet) to foster reform and restructuring in mathematics, science, computing, engineering, and technical education.

Advisory List of Reference Books for Grades K-6.

ERIC Educational Resources Information Center

North Carolina State Dept. of Public Instruction, Raleigh. Div. of Educational Media.

Intended to serve as a guide rather than as a comprehensive listing, this advisory list includes reference books appropriate for school media collections for grades K-6. Entries included on the list were selected from those materials submitted by publishers which received favorable reviews by educators. Single volumes and sets of books are listed…

Discovery of a Kojibiose Phosphorylase in Escherichia coli K-12.

PubMed

Mukherjee, Keya; Narindoshvili, Tamari; Raushel, Frank M

2018-05-15

The substrate profiles for three uncharacterized enzymes (YcjM, YcjT, and YcjU) that are expressed from a cluster of 12 genes ( ycjM-W and ompG) of unknown function in Escherichia coli K-12 were determined. Through a comprehensive bioinformatic and steady-state kinetic analysis, the catalytic function of YcjT was determined to be kojibiose phosphorylase. In the presence of saturating phosphate and kojibiose (α-(1,2)-d-glucose-d-glucose), this enzyme catalyzes the formation of d-glucose and β-d-glucose-1-phosphate ( k cat = 1.1 s -1 , K m = 1.05 mM, and k cat / K m = 1.12 × 10 3 M -1 s -1 ). Additionally, it was also shown that in the presence of β-d-glucose-1-phosphate, YcjT can catalyze the formation of other disaccharides using 1,5-anhydro-d-glucitol, l-sorbose, d-sorbitol, or l-iditol as a substitute for d-glucose. Kojibiose is a component of cell wall lipoteichoic acids in Gram-positive bacteria and is of interest as a potential low-calorie sweetener and prebiotic. YcjU was determined to be a β-phosphoglucomutase that catalyzes the isomerization of β-d-glucose-1-phosphate ( k cat = 21 s -1 , K m = 18 μM, and k cat / K m = 1.1 × 10 6 M -1 s -1 ) to d-glucose-6-phosphate. YcjU was also shown to exhibit catalytic activity with β-d-allose-1-phosphate, β-d-mannose-1-phosphate, and β-d-galactose-1-phosphate. YcjM catalyzes the phosphorolysis of α-(1,2)-d-glucose-d-glycerate with a k cat = 2.1 s -1 , K m = 69 μM, and k cat / K m = 3.1 × 10 4 M -1 s -1 .

California's Future: K-12 Education

ERIC Educational Resources Information Center

Hill, Laura; Gao, Niu; Warren, Paul

2015-01-01

California educates more than six million children in its K-12 public schools. More than half of these children are economically disadvantaged, and almost a quarter are not native English speakers (compared to less than one in ten nationwide). California is working to address these challenges, in part by adopting a new, simplified school finance…

Classifying K-12 Blended Learning

ERIC Educational Resources Information Center

Staker, Heather; Horn, Michael B.

2012-01-01

The growth of online learning in the K-12 sector is occurring both remotely through virtual schools and on campuses through blended learning. In emerging fields, definitions are important because they create a shared language that enables people to talk about the new phenomena. The blended-learning taxonomy and definitions presented in this paper…

Interstellar Molecules in K-12 Education

NASA Astrophysics Data System (ADS)

Kuiper, T. B. H.; Hofstadter, M. D.; Levin, S. M.; MacLaren, D.

2006-12-01

The Lewis Center for Educational Research (LCER) and the Jet Propulsion Laboratory (JPL) collaborate in a K-12 educational project in which students conduct observations for several research programs led by radio astronomers. The Goldstone-Apple Valley Radio Telescope (GAVRT) program provides participating teachers with curriculum elements, based on the students' observing experiences, which support national and state academic standards. The current program is based on 2.2-GHz and 8.4-GHz radiometric observations of variable sources. The research programs monitor Jupiter, Uranus, and a selected set of quasars. The telescope is a decommissioned NASA Deep Space Network antenna at Goldstone, California. In the next three years, a second telescope will be added. This telescope will at least operate at the above frequencies as well as 6 GHz and 12 GHz. Possibly, it will operate in a continuous band from 1.2 GHz to 14 GHz. In either case, the telescope will be able to observe at least the 6.6-GHz and 12.2-GHz methanol maser lines. The success of the GAVRT program depends critically on the participation of scientists committed to the research who have the ability and enthusiasm for interacting with K-12 students, typically through teleconferences. The scientists will initially work with the LCER staff to create curriculum elements around their observing program.

K-12 Technology Accessibility: The Message from State Governments

ERIC Educational Resources Information Center

Shaheen, Natalie L.; Lazar, Jonathan

2018-01-01

This study examined state education technology plans and technology accessibility statutes to attempt to answer the question--is K-12 instructional technology accessibility discussed in state-level technology accessibility statutes and education technology plans across the 50 United States? When a K-12 school district is planning the construction…

K-12 Science Curriculum Guide.

ERIC Educational Resources Information Center

Reading Community Schools, OH.

GRADES OR AGES: K-12. SUBJECT MATTER: Science. ORGANIZATION AND PHYSICAL APPEARANCE: The guide is divided into three sections, one each for elementary grades, middle grades, and high school. The first two sections are further subdivided by grade level and the last section is subdivided by course. Sections are laid out in four columns across two…

Isolation and genetic characterization of an Actinobacillus pleuropneumoniae serovar K12:O3 strain.

PubMed

Ito, Hiroya; Matsumoto, Atsuko

2015-01-01

An atypical Actinobacillus pleuropneumoniae serovar 12 strain, termed QAS106, was isolated from a clinical case of porcine pleuropneumonia in Japan. An immunodiffusion (ID) test identified the strain as serovar 12. However, the ID test also demonstrated that strain QAS106 shared antigenic determinants with both the serovar 3 and 15 reference strains. Strain QAS106 was positive in the capsular serovar 12-specific polymerase chain reaction (PCR) assay, while the PCR toxin gene profiling and omlA PCR typing assays indicated that strain QAS106 was similar to serovar 3. The nucleotide sequence of the 16S ribosomal DNA (rDNA) of strain QAS106 was identical with that of serovars 3 and 12, but it showed 99.7% identity with that of serovar 15. Nucleotide sequence analysis revealed that genes involved in biosynthesis of the capsular polysaccharide (CPS) of strain QAS106 were identical to those of serovar 12 at the amino acid level. On the other hand, strain QAS106 would express putative proteins involved in the biosynthesis of lipopolysaccharide (LPS) O-polysaccharide (O-PS), the amino acid sequences of which were identical or nearly identical to those of serovars 3 and 15. In conclusion, strain QAS106 should be recognized as K12:O3, even though typical serovar 12 strains are K12:O12. The emergence of an atypical A. pleuropneumoniae serovar 12 strain expressing a rare combination of CPS and O-PS antigens would hamper precise serodiagnosis by the use of either CPS- or LPS-based serodiagnostic methodology alone. © 2014 The Author(s).

Developing Open Education Literacies with Practicing K-12 Teachers

ERIC Educational Resources Information Center

Kimmons, Royce M.

2014-01-01

This study seeks to understand how to use formal learning activities to effectively support the development of open education literacies among K-12 teachers. Considering pre-and post-surveys from K-12 teachers (n = 80) who participated in a three-day institute, this study considers whether participants entered institutes with false confidence or…

Unified Science Approach K-12, Proficiency Levels 7-12.

ERIC Educational Resources Information Center

Oickle, Eileen M., Ed.

Presented is the second part of the K-12 unified science materials used in the public schools of Anne Arundel County, Maryland. Detailed descriptions are made of the roles of students and teachers, purposes of the bibliography, major concepts in unified science, processes of inquiry, a scheme and model for scientific literacy, and program…

Harnessing Technology to Improve K-12 Education. Discussion Paper 2012-05

ERIC Educational Resources Information Center

Chatterji, Aaron; Jones, Benjamin

2012-01-01

Technological progress has consistently driven remarkable advances in the U.S. economy, yet K-12 education sees little technological change compared to other sectors, even as U.S. K-12 students increasingly lag behind students in other nations. This proposal considers how we can take a signature American strength--innovation--and apply it to K-12…

Results and evaluation of key comparison CCM.P-K12.1 for very low helium flow rates (leak rates)

NASA Astrophysics Data System (ADS)

Šetina, Janez; Vičar, Martin; Pražák, Dominik

2015-01-01

The Czech Metrology Institute (CMI) took part and failed to prove equivalence in the Key Comparison CCM.P-K12 of helium leak artefacts (leak rates) into vacuum. After identifying and eliminating the cause of the failure, the Institute of Metals and Technology (IMT) of Slovenia, a successful participant in CCM.P-K12, volunteered to serve as pilot and link in a following bilateral comparison of IMT and CMI that obtained designation CCM.P-K12.1 in June 2012. It was decided to perform the comparison with a glass permeation helium leak artefact at nominally 3.10-11 mol/s (7.4.10-7 mbar.L.s-1) at 23 °C. Both the laboratory standards took part in CCM.P-K12 and were considered as primary. The comparison measurements were performed in October 2012. CMI proved equivalence both with IMT and with the reference value of the key comparison CCM.P-K12. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Comparative visualization of digital mammograms on clinical 2K monitor workstations and hardcopy: a contrast detail analysis

NASA Astrophysics Data System (ADS)

Torbica, Pavle; Buchberger, Wolfgang; Bernathova, M.; Mallouhi, Ammar; Peer, Siegfried; Bosmans, Hilde; Faulkner, Keith

2003-05-01

The purpose of this study was to compare the radiologist`s performance in detecting small low-contrast objects with hardcopy and softcopy reading of digital mammograms. 12 images of a contrast-detail (CD) phantom without and with 25.4 mm, 50.8 mm, and 76.2 mm additional polymethylmetacrylate (PMMA) attenuation were acquired with a caesium iodid/amorphous silicon flat panel detector under standard exposure conditions. The phantom images were read by three independent observers, by conducting a four-alternative forced-choice experiment. Reading of the hardcopy was done on a mammography viewbox under standardized reading conditions. For soft copy reading, a dedicated workstation with two 2K monitors was used. CD-curves and image quality figure (IQF) values were calculated from the correct detection rates of randomly located gold disks in the phantom. The figures were compared for both reading conditions and for different PMMA layers. For all types of exposures, soft copy reading resulted in significantly better contrast-detail characteristics and IQF values, as compared to hard copy reading of laser printouts. (p< 0.01). The authors conclude that the threshold contrast characteristics of digital mammograms displayed on high-resolution monitors are sufficient to make soft copy reading of digital mammograms feasible.

Earth Science Content Guidelines Grades K-12.

ERIC Educational Resources Information Center

American Geological Inst., Alexandria, VA.

Teams of teachers, other science educators, and scientists selected from a national search for project writers have proposed using the following set of questions to guide the inclusion of earth science content into the kindergarten through grade 12 curriculum. The Essential Questions are organized in a K-12 sequence by six content areas: (1) Solid…

Method and apparatus for a single channel digital communications system. [synchronization of received PCM signal by digital correlation with reference signal

NASA Technical Reports Server (NTRS)

Couvillon, L. A., Jr.; Carl, C.; Goldstein, R. M.; Posner, E. C.; Green, R. R. (Inventor)

1973-01-01

A method and apparatus are described for synchronizing a received PCM communications signal without requiring a separate synchronizing channel. The technique provides digital correlation of the received signal with a reference signal, first with its unmodulated subcarrier and then with a bit sync code modulated subcarrier, where the code sequence length is equal in duration to each data bit.

Scientific and Engineering Practices in K-12 Classrooms: Understanding "A Framework for K-12 Science Education"

ERIC Educational Resources Information Center

Bybee, Rodger W.

2011-01-01

In this article, the author presents the science and engineering practices from the recently released "A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas" (NRC 2011). The author recognizes the changes implied by the new framework, and eventually a new generation of science education standards will present new…

Dual-reference digital holographic interferometry for analyzing high-density gradients in fluid mechanics.

PubMed

Desse, Jean-Michel; Olchewsky, François

2018-04-15

This Letter proposes a dual-reference digital holographic interferometer for analyzing the high refractive index encountered in transonic and supersonic flows. For that, a Wollaston prism is inserted in the reference arm in order to simultaneously generate two orthogonally polarized reference waves. As a consequence, recorded interferograms contain two crossed and perpendicular interference patterns that give two orders fully separated in the Fourier spectrum. It is then possible to analyze a transparent object regardless of the orientation of the refractive index gradient using the two phase maps reconstructed with each of the two first interference orders. Fusion of the phase maps yields a single phase map in which the phase singularities are removed. Experimental results demonstrate the suitability of the proposed approach for analyzing shock waves in the unsteady wake flow around a circular cylinder at Mach 0.75.

A Digital Library for Education: The PEN-DOR Project.

ERIC Educational Resources Information Center

Fullerton, Karen; Greenberg, Jane; McClure, Maureen; Rasmussen, Edie; Stewart, Darin

1999-01-01

Describes Pen-DOR (Pennsylvania Education Network Digital Object Repository), a digital library designed to provide K-12 educators with access to multimedia resources and tools to create new lesson plans and modify existing ones via the World Wide Web. Discusses design problems of a distributed, object-oriented database architecture and describes…

21 CFR 1141.12 - Incorporation by reference of required warnings.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Incorporation by reference of required warnings... SERVICES (CONTINUED) TOBACCO PRODUCTS CIGARETTE PACKAGE AND ADVERTISING WARNINGS Cigarette Package and Advertising Warnings § 1141.12 Incorporation by reference of required warnings. “Cigarette Required Warnings...

Complete Genome Sequence of NEB 5-alpha, a Derivative of Escherichia coli K-12 DH5α.

PubMed

Anton, Brian P; Raleigh, Elisabeth A

2016-11-10

Escherichia coli K-12 DH5α is one of the most popular and widely available laboratory strains, but, surprisingly, no complete genome sequence has been publicly available. Here, we report the complete, finished sequence of NEB 5-alpha (DH5α fhuA2). It should serve as a useful reference for researchers working with DH5α. Copyright © 2016 Anton and Raleigh.

Educational Technology: A Review of the Integration, Resources, and Effectiveness of Technology in K-12 Classrooms

ERIC Educational Resources Information Center

Delgado, Adolph J.; Wardlow, Liane; McKnight, Katherine; O'Malley, Kimberly

2015-01-01

There is no questioning that the way people live, interact, communicate, and conduct business is undergoing a profound, rapid change. This change is often referred to as the "digital revolution," which is the advancement of technology from analog, electronic and mechanical tools to the digital tools available today. Moreover, technology…

A Typology for Analyzing Digital Curricula in Mathematics Education

ERIC Educational Resources Information Center

Choppin, Jeffrey; Carson, Cynthia; Borys, Zenon; Cerosaletti, Cathleen; Gillis, Rob

2014-01-01

Digital content is increasingly present in U.S. K-12 classrooms, with a current push by federal officials to increase the rate at which digital textbooks are adopted. While some teachers' use of electronic resources involves locating activities and lessons from various internet sites, textbook and educational software companies have begun to…

12 CFR 211.11 - Advisory opinions under Regulation K.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 12 Banks and Banking 2 2013-01-01 2013-01-01 false Advisory opinions under Regulation K. 211.11... INTERNATIONAL BANKING OPERATIONS (REGULATION K) International Operations of U.S. Banking Organizations § 211.11 Advisory opinions under Regulation K. (a) Request for advisory opinion. Any person may submit a request to...

12 CFR 211.11 - Advisory opinions under Regulation K.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 12 Banks and Banking 2 2010-01-01 2010-01-01 false Advisory opinions under Regulation K. 211.11... INTERNATIONAL BANKING OPERATIONS (REGULATION K) International Operations of U.S. Banking Organizations § 211.11 Advisory opinions under Regulation K. (a) Request for advisory opinion. Any person may submit a request to...

12 CFR 211.11 - Advisory opinions under Regulation K.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 12 Banks and Banking 2 2014-01-01 2014-01-01 false Advisory opinions under Regulation K. 211.11... INTERNATIONAL BANKING OPERATIONS (REGULATION K) International Operations of U.S. Banking Organizations § 211.11 Advisory opinions under Regulation K. (a) Request for advisory opinion. Any person may submit a request to...

12 CFR 211.11 - Advisory opinions under Regulation K.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 12 Banks and Banking 2 2011-01-01 2011-01-01 false Advisory opinions under Regulation K. 211.11... INTERNATIONAL BANKING OPERATIONS (REGULATION K) International Operations of U.S. Banking Organizations § 211.11 Advisory opinions under Regulation K. (a) Request for advisory opinion. Any person may submit a request to...

12 CFR 211.11 - Advisory opinions under Regulation K.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 12 Banks and Banking 2 2012-01-01 2012-01-01 false Advisory opinions under Regulation K. 211.11... INTERNATIONAL BANKING OPERATIONS (REGULATION K) International Operations of U.S. Banking Organizations § 211.11 Advisory opinions under Regulation K. (a) Request for advisory opinion. Any person may submit a request to...

Language Arts Resource Guide K-12.

ERIC Educational Resources Information Center

Pitman, John C.

One of a series designed to help districts refine and upgrade their current curricular offerings, this resource guide deals with the development of a unified K-12 language arts curriculum that combines the four major language arts components of listening, speaking, reading, and writing. Following a brief foreword and list of acknowledgments, the…

Guidelines for Communication Arts: K-12.

ERIC Educational Resources Information Center

1971

These guidelines are part of a total curricular program K-12 developed for use in the elementary and secondary schools of the Diocese of Cleveland. Objectives for the study of the communication arts in these grades are listed as follows: (1) Listening with attention, discrimination, and empathy, (2) Viewing with perception, discrimination, and…

Learning about Surface Area through a Digital Fabrication-Augmented Unit

ERIC Educational Resources Information Center

Corum, Kimberly; Garofalo, Joe

2016-01-01

Surface area is consistently identified as a curriculum standard for K-12 students and it regularly appears on national and international assessments. Recently, many schools began acquiring digital fabrication and advanced manufacturing equipment. The growing use of digital fabrication in classrooms raises the question of whether or not this…

Formulating Independent School K-12 Quality Physical Education Program Guidelines

ERIC Educational Resources Information Center

Currie, Stuart M.; Phillips, Michael B.; Jubenville, Colby B.

2012-01-01

The purpose of this study was to formulate Tennessee independent school K-12 quality physical education program guidelines. A panel of 18 physical education representatives from Tennessee independent schools K-12 participated in a three-phase Delphi study and completed three opinionnaires via e-mail. In Phase One, Opinionnaire One solicited panel…

Investing in K-12 Technology Equipment: Strategies for State Policymakers.

ERIC Educational Resources Information Center

Good, Dixie Griffin

This report examines decisions regarding investments in K-12 technology. The first section presents an overview of technology in K-12 public schools, including a sampling of how technology is being used to further education goals for teachers, students, and administrators. The second section establishes a set of figures that indicate the current…

Copyright Updates for K-12 Librarians

ERIC Educational Resources Information Center

Johnson, Wendell G.

2016-01-01

Copyright concerns continue to bedevil K-12 librarians, who are often called upon to act as the copyright officers in public schools. This article describes recent copyright developments of concern to these librarians in three areas: a recent court case involving a university library, pending legislation supported by ALA, and a regulatory update.…

K-12 Bolsters Ties to Engineering

ERIC Educational Resources Information Center

Robelen, Erik W.

2013-01-01

When science, technology, engineering and mathematics (STEM) education is discussed in the K-12 sphere, it often seems like shorthand for mathematics and science, with perhaps a nod to technology and even less, if any, real attention to engineering. But recent developments signal that the "e" in STEM may be gaining a firmer foothold at…

State of the Nation: K-12 Online Learning in Canada

ERIC Educational Resources Information Center

Barbour, Michael K.

2010-01-01

Two years ago, the then North American Council for Online Learning released the initial "Snapshot State of the Nation: K-12 Online Learning in Canada" report. This study was the first systematic examination of K-12 distance education policies and activities in each of the thirteen Canadian provinces and territories. One year ago, the…

Escherichia coli K-12: a cooperatively developed annotation snapshot—2005

PubMed Central

Riley, Monica; Abe, Takashi; Arnaud, Martha B.; Berlyn, Mary K.B.; Blattner, Frederick R.; Chaudhuri, Roy R.; Glasner, Jeremy D.; Horiuchi, Takashi; Keseler, Ingrid M.; Kosuge, Takehide; Mori, Hirotada; Perna, Nicole T.; Plunkett, Guy; Rudd, Kenneth E.; Serres, Margrethe H.; Thomas, Gavin H.; Thomson, Nicholas R.; Wishart, David; Wanner, Barry L.

2006-01-01

The goal of this group project has been to coordinate and bring up-to-date information on all genes of Escherichia coli K-12. Annotation of the genome of an organism entails identification of genes, the boundaries of genes in terms of precise start and end sites, and description of the gene products. Known and predicted functions were assigned to each gene product on the basis of experimental evidence or sequence analysis. Since both kinds of evidence are constantly expanding, no annotation is complete at any moment in time. This is a snapshot analysis based on the most recent genome sequences of two E.coli K-12 bacteria. An accurate and up-to-date description of E.coli K-12 genes is of particular importance to the scientific community because experimentally determined properties of its gene products provide fundamental information for annotation of innumerable genes of other organisms. Availability of the complete genome sequence of two K-12 strains allows comparison of their genotypes and mutant status of alleles. PMID:16397293

ISOLEUCINE AND VALINE METABOLISM IN ESCHERICHIA COLI XI. K-12

PubMed Central

Leavitt, Richard I.; Umbarger, H. E.

1962-01-01

Leavitt, Richard I. (Harvard Medical School, Boston, Mass.) and H. E. Umbarger. Isoleucine and valine metabolism in Escherichia coli. XI. Valine inhibition of the growth of Escherichia coli strain K-12. J. Bacteriol. 83:624–630. 1962.—The inhibition of the growth of Escherichia coli strain K-12 by valine was shown to be due to the sensitivity of the acetohydroxybutyrate-forming system to valine. It was demonstrated that both E. coli strain W, a strain whose growth is unaffected by valine, and a valine-resistant mutant of strain K-12 have acetolactate- and acetohydroxybutyrate-forming systems which are less sensitive to valine than that of strain K-12. It was further shown that α-aminobutyrate accumulates in the culture fluid of the valine-sensitive strain when incubated in the presence of valine. The levels of valine in the “free amino acid pool” were examined and found to be related to the differences in valine sensitivity of the acetolactate-forming systems of the three strains. PMID:14463257

21 CFR 1141.12 - Incorporation by reference of required warnings.

Code of Federal Regulations, 2012 CFR

2012-04-01

... SERVICES (CONTINUED) TOBACCO PRODUCTS CIGARETTE PACKAGE AND ADVERTISING WARNINGS; (Eff. 9-22-12) Cigarette Package and Advertising Warnings § 1141.12 Incorporation by reference of required warnings. “Cigarette... Communication and Education, ATTN: Cigarette Warning File Requests, 9200 Corporate Blvd., Rockville, MD 20850, 1...

West Virginia Digital Learning: Report to the Governor, Legislature, and West Virginia Board of Education

ERIC Educational Resources Information Center

Alliance for Excellent Education, 2014

2014-01-01

Accomplishing personalized, deeper learning through anywhere, anytime digital learning requires a redesign of the K-12 education system. This report looks at readiness for digital learning at two levels in West Virginia: the district capacity building to ready the system for digital learning and school implementation of digital learning. The…

The potential for neurovascular intravenous angiography using K-edge digital subtraction angiography

NASA Astrophysics Data System (ADS)

Schültke, E.; Fiedler, S.; Kelly, M.; Griebel, R.; Juurlink, B.; LeDuc, G.; Estève, F.; Le Bas, J.-F.; Renier, M.; Nemoz, C.; Meguro, K.

2005-08-01

Background: Catheterization of small-caliber blood vessels in the central nervous system can be extremely challenging. Alternatively, intravenous (i.v.) administration of contrast agent is minimally invasive and therefore carries a much lower risk for the patient. With conventional X-ray equipment, volumes of contrast agent that could be safely administered to the patient do not allow acquisition of high-quality images after i.v. injection, because the contrast bolus is extremely diluted by passage through the heart. However, synchrotron-based digital K-edge subtraction angiography does allow acquisition of high-quality images after i.v. administration of relatively small doses of contrast agent. Materials and methods: Eight adult male New Zealand rabbits were used for our experiments. Animals were submitted to both angiography with conventional X-ray equipment and synchrotron-based digital subtraction angiography. Results: With conventional X-ray equipment, no contrast was seen in either cerebral or spinal blood vessels after i.v. injection of iodinated contrast agent. However, using K-edge digital subtraction angiography, as little as 1 ml iodinated contrast agent, when administered as i.v. bolus, yielded images of small-caliber blood vessels in the central nervous system (both brain and spinal cord). Conclusions: If it would be possible to image blood vessels of the same diameter in the central nervous system of human patients, the synchrotron-based technique could yield high-quality images at a significantly lower risk for the patient than conventional X-ray imaging. Images could be acquired where catheterization of feeding blood vessels has proven impossible.

Investigating the Potential of MOOCs in K-12 Teaching and Learning Environments

ERIC Educational Resources Information Center

Nigh, Jennifer; Pytash, Kristine E.; Ferdig, Richard E.; Merchant, William

2015-01-01

The massive open online course (MOOC) is a relatively new concept in K-12 teaching and learning environments. Although significant work has been done with MOOCs since 2008, it has only been recently that MOOCs have been studied with K-12 populations. The purpose of this study was to further examine the motivation of K-12 students enrolled in a…

Problem-Based Learning in the Life Science Classroom, K-12

ERIC Educational Resources Information Center

McConnell, Tom; Parker, Joyce; Eberhardt, Janet

2016-01-01

"Problem-Based Learning in the Life Science Classroom, K-12" offers a great new way to ignite your creativity. Authors Tom McConnell, Joyce Parker, and Janet Eberhardt show you how to engage students with scenarios that represent real-world science in all its messy, thought-provoking glory. The scenarios prompt K-12 learners to immerse…

K-12 Issues Will Await President

ERIC Educational Resources Information Center

Hoff, David J.; Klein, Alyson

2008-01-01

At the end of a presidential campaign in which education received some attention but never emerged as a top-tier issue, analysts were trying to look beyond the week's election to the K-12 issues awaiting the next president and gauge where they might fit as a new administration prepares to grapple with a global economic crisis. While education…

A Library approach to establish an Educational Data Curation Framework (EDCF) that supports K-12 data science sustainability

NASA Astrophysics Data System (ADS)

Branch, B. D.; Wegner, K.; Smith, S.; Schulze, D. G.; Merwade, V.; Jung, J.; Bessenbacher, A.

2013-12-01

It has been the tradition of the libraries to support literacy. Now in the realm of Executive Order, Making Open and Machine Readable the New Default for Government Information, May 9, 2013, the library has the responsibility to support geospatial data, big data, earth science data or cyber infrastructure data that may support STEM for educational pipeline stimulation. (Such information can be found at http://www.whitehouse.gov/the-press-office/2013/05/09/executive-order-making-open-and-machine-readable-new-default-government-.) Provided is an Educational Data Curation Framework (EDCF) that has been initiated in Purdue research, geospatial data service engagement and outreach endeavors for future consideration and application to augment such data science and climate literacy needs of future global citizens. In addition, this endorsement of this framework by the GLOBE program may facilitate further EDCF implementations, discussion points and prototypes for libraries. In addition, the ECDF will support teacher-led, placed-based and large scale climate or earth science learning systems where such knowledge transfer of climate or earth science data is effectively transferred from higher education research of cyberinfrastructure use such as, NOAA or NASA, to K-12 teachers and school systems. The purpose of this effort is to establish best practices for sustainable K-12 data science delivery system or GLOBE-provided system (http://vis.globe.gov/GLOBE/) where libraries manage the data curation and data appropriateness as data reference experts for such digital data. Here, the Purdue University Libraries' GIS department works to support soils, LIDAR and water science data experiences to support teacher training for an EDCF development effort. Lastly, it should be noted that the interdisciplinary collaboration and demonstration of library supported outreach partners and national organizations such the GLOBE program may best foster EDCF development. This trend in data

A fractional-N PLL with small ΔK vco wideband LC-VCO and current-matching CP for M-DTV systems

NASA Astrophysics Data System (ADS)

Gao, Haijun; Yan, Yuepeng; Du, Zhankun; Guo, Guiliang; Zeng, Longyue

2011-06-01

An Σ-Δ fractional-N frequency synthesiser with small K vco-variation wideband LC voltage controlled oscillator (LC-VCO) and current-matching charge pump (CP) for Mobile Digital television Systems is presented. To achieve small VCO-gain (K vco) variation, a parallel switched varactor array is proposed to the conventional wideband LC-VCO with switched capacitor array, the value of the switched varactor is pre-set and both arrays are controlled by the same switching code. Perfect current matching and good stability are obtained by the improved CP with an added bias branch circuit for low reference spur. The chip was fabricated in a Taiwan Semiconductor Manufacturing Company (TSMC) 0.25 µm complementary metal-oxide-semiconductor process and draws 12 mA from a 2.5 V supply voltage. The synthesiser covers a wide tuning range from 0.82 to 1.85 GHz with two integrated LC-VCOs, and each VCO achieves a K vco variation of less than 16% with a tuning range of more than 46%. The current mismatch of CP is as low as 1.2%. The measured close-in and out-of-band phase noise are -83.5 dBc/Hz@10 kHz and -127 dBc/Hz@1 MHz, respectively, the reference spur is -76.3 dBc.

Einstein Online: A Web-based Course for K-12 Teachers from the American Museum of Natural History

NASA Astrophysics Data System (ADS)

Steiner, Robert

2004-05-01

Einstein Online: A Web-based Course for K-12 Teachers from the American Museum of Natural History Robert V. Steiner, Ph.D. Project Director, Seminars on Science American Museum of Natural History The American Museum of Natural History, in collaboration with Hebrew University and the Skirball Cultural Center, has created a major exhibit on Albert Einstein, including extensive coverage of his contributions to relativity, quantum mechanics and unified field theories as well as the social and political dimensions of his life. Leveraging the assets of this exhibit as well as the expertise of the Museum's Department of Astrophysics and its Education Department, a six-week online professional development course for K-12 teachers has been created, providing inquires into some of the frontiers of physics through rich media resources, facilitated discussion forums and assignments. The course, which requires only minimal Web access, offers a unique opportunity for teachers across the United States to explore modern physics guided by a working scientist and a skilled online facilitator. The course includes original essays by Museum scientists, images, video, simulations, web links and digital resources for classroom use. The course design, development, implementation and evaluation are reviewed.

Digital Advances Reshaping K-12 Testing. Technology Counts, 2014. Education Week. Volume 33 Number 25

ERIC Educational Resources Information Center

Edwards, Virginia B., Ed.

2014-01-01

Figuring out how to use digital tools to transform testing requires a willingness to invest in new technologies and the patience to experiment with novel approaches, a commitment to ongoing professional development and reliable technical support, and an openness to learn from mistakes. Whatever bumpy ride this technological journey takes, experts…

A Vision in Aeronautics: The K-12 Wind Tunnel Project

NASA Technical Reports Server (NTRS)

1997-01-01

A Vision in Aeronautics, a project within the NASA Lewis Research Center's Information Infrastructure Technologies and Applications (IITA) K-12 Program, employs small-scale, subsonic wind tunnels to inspire students to explore the world of aeronautics and computers. Recently, two educational K-12 wind tunnels were built in the Cleveland area. During the 1995-1996 school year, preliminary testing occurred in both tunnels.

A Critique of the Brave New World of K-12

ERIC Educational Resources Information Center

Salmani-Nodoushan, Mohammad Ali

2008-01-01

Over the past few decades has changed so rapidly that remote areas of the Earth are now inhabited by human beings. Technology has also developed and people can stay at home and have access to virtual schools. This has stimulated the need for K-12 education. K-12 education has emerged from the no-child-left-behind concerns of governments for…

Addition of Escherichia coli K-12 growth observation and gene essentiality data to the EcoCyc database.

PubMed

Mackie, Amanda; Paley, Suzanne; Keseler, Ingrid M; Shearer, Alexander; Paulsen, Ian T; Karp, Peter D

2014-03-01

The sets of compounds that can support growth of an organism are defined by the presence of transporters and metabolic pathways that convert nutrient sources into cellular components and energy for growth. A collection of known nutrient sources can therefore serve both as an impetus for investigating new metabolic pathways and transporters and as a reference for computational modeling of known metabolic pathways. To establish such a collection for Escherichia coli K-12, we have integrated data on the growth or nongrowth of E. coli K-12 obtained from published observations using a variety of individual media and from high-throughput phenotype microarrays into the EcoCyc database. The assembled collection revealed a substantial number of discrepancies between the high-throughput data sets, which we investigated where possible using low-throughput growth assays on soft agar and in liquid culture. We also integrated six data sets describing 16,119 observations of the growth of single-gene knockout mutants of E. coli K-12 into EcoCyc, which are relevant to antimicrobial drug design, provide clues regarding the roles of genes of unknown function, and are useful for validating metabolic models. To make this information easily accessible to EcoCyc users, we developed software for capturing, querying, and visualizing cellular growth assays and gene essentiality data.

Structure and temperature-dependent phase transitions of lead-free Bi 1/2Na 1/2TiO 3-Bi 1/2K 1/2TiO 3-K 0.5Na 0.5NbO 3 piezoceramics

DOE Office of Scientific and Technical Information (OSTI.GOV)

Anton, Eva-Maria; Schmitt, Ljubomira Ana; Hinterstein, Manuel

2014-05-28

Structure and phase transitions of (1-y)((1-x)Bi 1/2Na 1/2TiO 3-xBi 1/2K 1/2TiO 3)-yK 0.5Na 0.5NbO 3 (x; y) piezoceramics (0.1 ≤ x ≤ 0.4; 0 ≤ y ≤ 0.05) were investigated by transmission electron microscopy, neutron diffraction, temperature-dependent x-ray diffraction, and Raman spectroscopy. The local crystallographic structure at room temperature (RT) does not change by adding K 0.5Na 0.5NbO 3 to Bi 1/2Na 1/2TiO 3-xBi 1/2K 1/2TiO 3 for x = 0.2 and 0.4. The average crystal structure and microstructure on the other hand develop from mainly long-range polar order with ferroelectric domains to short-range order with polar nanoregions displaying amore » more pronounced relaxor character. The (0.1; 0) and (0.1; 0.02) compositions exhibit monoclinic Cc space group symmetry, which transform into Cc + P4bm at 185 and 130 °C, respectively. This high temperature phase is stable at RT for the morphotropic phase boundary compositions of (0.1; 0.05) and all compositions with x = 0.2. For the compositions of (0.1; 0) and (0.1; 0.02), local structural changes on heating are evidenced by Raman; for all other compositions, changes in the long-range average crystal structure were observed.« less

Teachers' Perceptions of Digital Badges as Recognition of Professional Development

ERIC Educational Resources Information Center

Jones, W. Monty; Hope, Samantha; Adams, Brianne

2018-01-01

This mixed methods study examined teachers' perceptions and uses of digital badges received as recognition of participation in a professional development program. Quantitative and qualitative survey data was collected from 99 K-12 teachers who were awarded digital badges in Spring 2016. In addition, qualitative data was collected through…

An Examination of Ideology among Selected K12 Christian School Superintendents

ERIC Educational Resources Information Center

Dolson, Jimmy L.

2013-01-01

This research project focused on explaining the decision making process of K12 Christian school superintendents whose schools belong to the Association of Christian Schools International (ACSI) organization. In spite of their similar religious and philosophical beliefs, ACSI K12 Christian school superintendents differed significantly in…

Mathematics. Exceptional Child Education Curriculum K-12.

ERIC Educational Resources Information Center

Jordon, Thelma; And Others

The mathematics curriculum provides a framework of instruction for exceptional child education in grades K-12. Content areas include: numeration, whole numbers, rational numbers, real/complex numbers, calculator literacy, measurement, geometry, statistics, functions/relations, computer literacy, and pre-algebra. The guide is organized by content…

Using Digital Mapping Programs to Augment Student Learning in Social Studies

ERIC Educational Resources Information Center

Chandler, Thomas; An, Heejung

2007-01-01

Thomas Chandler and Heejung An describe how digital mapping technology can be incorporated into community-based K-12 social studies projects. According to Chandler and An, digital mapping can add value to the social studies curriculum by enabling students to better understand the interdependence between the lives of individuals and their…

Cases on Digital Game-Based Learning: Methods, Models, and Strategies

ERIC Educational Resources Information Center

Baek, Youngkyun; Whitton, Nicola

2013-01-01

In K-12 classrooms, as well as on the college and university level, the incorporation of digital games has played a vital role in the educational system. While introducing teachers to new fields, these digital games have been designed and implemented for the classroom and have shown positive results at a variety of educational levels. Cases on…

Can Digital Learning Transform Education?

ERIC Educational Resources Information Center

Finn, Chester E., Jr.; Horn, Michael B.

2013-01-01

The enthusiasm for digital learning is contagious. More than 2 million K-12 students are enrolled in online courses today, and research firm Ambient Insight projects that figure will hit 10 million by 2014. Will today's wave of technology inexorably change the face of schooling, or must school administrators first alter policy? This article…

Digital Control of the Czochralski Growth of Gallium Arsenide-Controller Software Reference Manual

DTIC Science & Technology

1987-07-15

possible with regard to the format of the commands. Several help menus and extensive command prompts guide the operator. The dialog between the...single-zone heater is in use.) - 4 - Kfc ^&S^^ p IS’ K: i 1. Digital Control of Czochralski GaAs Crystal Growth (2) Four tachometers which are...commands for the display of menus or auxiliary information. The scrolled portion shrinks to four lines if auxiliary data display is re- quested with the

Social Networking for the K-12 Set

ERIC Educational Resources Information Center

Klein, Jim

2008-01-01

Education technology leaders are ever seeking new ways to eliminate the traditional social and geographic boundaries that hinder communication and collaboration for both K-12 students and educators. Larger districts with geographically dispersed schools often find that innovative ideas for technology use and integration are balkanized into…

Students with Special Health Care Needs in K-12 Virtual Schools

ERIC Educational Resources Information Center

Fernandez, Heidi; Ferdig, Richard E.; Thompson, Lindsay A.; Schottke, Katherine; Black, Erik W.

2016-01-01

This study sought to establish a baseline for understanding the epidemiology of online K-12 students with special health care needs, determine the prevalence in K-12 online schooling of students from certain racial/ethnic backgrounds, those with socioeconomic disadvantages, and determine how these students perform in online classes compared to…

Framing K-12 partnerships in order to make a difference.

PubMed

Hamos, James E

2006-06-01

The Health Professions Partnership Initiative (HPPI) furthered the establishment of partnerships between academic health centers and K-12 school systems. The present article contends that partnerships in efforts such as the HPPI exist in varying degrees of depth with deeper partnerships being those based in a concept of mutuality even as partners continue to maintain institutional identity. In the context of K-12 schools, the article reinforces the view that K-12 students, teachers, and administrators can benefit through partnership contexts, but also suggests that institutions of higher education-including academic health centers-should enter into partnerships because they benefit when they commit as stakeholders in the outcomes, not principally as altruistic good neighbors to the schools. Partnerships can continue to grow when multiple stakeholders accept mutual dependence as a norm, with goals, processes, and outcomes impacting each partner.

Neutron study of B 12 coenzyme at 15 K

NASA Astrophysics Data System (ADS)

Bouquiere, J. P.

1992-06-01

This high resolution and low temperature study, at 15 K, of the vitamin B 12 coenzyme ( C72H100N18O17PCo) was undertaken to confirm and clarify the water networks identified at 279 K by Savage [1]. Details of the data collection and refinement of the low temperature structure are described, a comparison of the coenzyme molecule structures at 15 and 279 K is made, and that of solvent structures outlined.

Recording multiple spatially-heterodyned direct to digital holograms in one digital image

DOEpatents

Hanson, Gregory R [Clinton, TN; Bingham, Philip R [Knoxville, TN

2008-03-25

Systems and methods are described for recording multiple spatially-heterodyned direct to digital holograms in one digital image. A method includes digitally recording, at a first reference beam-object beam angle, a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram to sit on top of a first spatial-heterodyne carrier frequency defined by the first reference beam-object beam angle; digitally recording, at a second reference beam-object beam angle, a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram to sit on top of a second spatial-heterodyne carrier frequency defined by the second reference beam-object beam angle; applying a first digital filter to cut off signals around the first original origin and define a first result; performing a first inverse Fourier transform on the first result; applying a second digital filter to cut off signals around the second original origin and define a second result; and performing a second inverse Fourier transform on the second result, wherein the first reference beam-object beam angle is not equal to the second reference beam-object beam angle and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

Legitimizing Community Engagement with K-12 Schools

ERIC Educational Resources Information Center

Furco, Andrew

2013-01-01

This article examines the issue of internal legitimization and its importance in securing high-quality community engagement in K-12 schools. Drawing on the literature from the fields of community engagement, school reform, school-university partnerships, and school-community partnerships, this article describes some of the prevailing challenges…

Developing an Environmental Education Program, K-12.

ERIC Educational Resources Information Center

Stapp, William B.; Visse, Ellen Vande

Strategy for developing and implementing an environmental education program in grades K-12 is proposed in this booklet. Its goal is to help students become environmentally educated decision-makers; to understand the importance of relating ecological, economic, social, technological, and political information when working toward the solution of…

Digital immunohistochemistry wizard: image analysis-assisted stereology tool to produce reference data set for calibration and quality control.

PubMed

Plancoulaine, Benoît; Laurinaviciene, Aida; Meskauskas, Raimundas; Baltrusaityte, Indra; Besusparis, Justinas; Herlin, Paulette; Laurinavicius, Arvydas

2014-01-01

Digital image analysis (DIA) enables better reproducibility of immunohistochemistry (IHC) studies. Nevertheless, accuracy of the DIA methods needs to be ensured, demanding production of reference data sets. We have reported on methodology to calibrate DIA for Ki67 IHC in breast cancer tissue based on reference data obtained by stereology grid count. To produce the reference data more efficiently, we propose digital IHC wizard generating initial cell marks to be verified by experts. Digital images of proliferation marker Ki67 IHC from 158 patients (one tissue microarray spot per patient) with an invasive ductal carcinoma of the breast were used. Manual data (mD) were obtained by marking Ki67-positive and negative tumour cells, using a stereological method for 2D object enumeration. DIA was used as an initial step in stereology grid count to generate the digital data (dD) marks by Aperio Genie and Nuclear algorithms. The dD were collected into XML files from the DIA markup images and overlaid on the original spots along with the stereology grid. The expert correction of the dD marks resulted in corrected data (cD). The percentages of Ki67 positive tumour cells per spot in the mD, dD, and cD sets were compared by single linear regression analysis. Efficiency of cD production was estimated based on manual editing effort. The percentage of Ki67-positive tumor cells was in very good agreement in the mD, dD, and cD sets: regression of cD from dD (R2=0.92) reflects the impact of the expert editing the dD as well as accuracy of the DIA used; regression of the cD from the mD (R2=0.94) represents the consistency of the DIA-assisted ground truth (cD) with the manual procedure. Nevertheless, the accuracy of detection of individual tumour cells was much lower: in average, 18 and 219 marks per spot were edited due to the Genie and Nuclear algorithm errors, respectively. The DIA-assisted cD production in our experiment saved approximately 2/3 of manual marking. Digital IHC wizard

Digital immunohistochemistry wizard: image analysis-assisted stereology tool to produce reference data set for calibration and quality control

PubMed Central

2014-01-01

Background Digital image analysis (DIA) enables better reproducibility of immunohistochemistry (IHC) studies. Nevertheless, accuracy of the DIA methods needs to be ensured, demanding production of reference data sets. We have reported on methodology to calibrate DIA for Ki67 IHC in breast cancer tissue based on reference data obtained by stereology grid count. To produce the reference data more efficiently, we propose digital IHC wizard generating initial cell marks to be verified by experts. Methods Digital images of proliferation marker Ki67 IHC from 158 patients (one tissue microarray spot per patient) with an invasive ductal carcinoma of the breast were used. Manual data (mD) were obtained by marking Ki67-positive and negative tumour cells, using a stereological method for 2D object enumeration. DIA was used as an initial step in stereology grid count to generate the digital data (dD) marks by Aperio Genie and Nuclear algorithms. The dD were collected into XML files from the DIA markup images and overlaid on the original spots along with the stereology grid. The expert correction of the dD marks resulted in corrected data (cD). The percentages of Ki67 positive tumour cells per spot in the mD, dD, and cD sets were compared by single linear regression analysis. Efficiency of cD production was estimated based on manual editing effort. Results The percentage of Ki67-positive tumor cells was in very good agreement in the mD, dD, and cD sets: regression of cD from dD (R2=0.92) reflects the impact of the expert editing the dD as well as accuracy of the DIA used; regression of the cD from the mD (R2=0.94) represents the consistency of the DIA-assisted ground truth (cD) with the manual procedure. Nevertheless, the accuracy of detection of individual tumour cells was much lower: in average, 18 and 219 marks per spot were edited due to the Genie and Nuclear algorithm errors, respectively. The DIA-assisted cD production in our experiment saved approximately 2/3 of manual

Ground Truth Studies - A hands-on environmental science program for students, grades K-12

NASA Technical Reports Server (NTRS)

Katzenberger, John; Chappell, Charles R.

1992-01-01

The paper discusses the background and the objectives of the Ground Truth Studies (GTSs), an activity-based teaching program which integrates local environmental studies with global change topics, utilizing remotely sensed earth imagery. Special attention is given to the five key concepts around which the GTS programs are organized, the pilot program, the initial pilot study evaluation, and the GTS Handbook. The GTS Handbook contains a primer on global change and remote sensing, aerial and satellite images, student activities, glossary, and an appendix of reference material. Also described is a K-12 teacher training model. International participation in the program is to be initiated during the 1992-1993 school year.

Interview with Joe Freidhoff: A Bird's-Eye View of K-12 Online Learning

ERIC Educational Resources Information Center

Pourreau, Leslie

2015-01-01

The intent of this article is to introduce long-time "Online Learning" readership to the field of K-12 online learning while also providing direction for the K-12 online learning scholars about where the field is going or should be going in terms of meeting the needs of K-12 stakeholders. Recently an interview was conducted with Dr. Joe…

Accuracy of Answers Provided by Digital/Face-to-Face Reference Services in Japanese Public Libraries and Q & A Sites

ERIC Educational Resources Information Center

Tsuji, Keita; To, Haruna; Hara, Atsuyuki

2011-01-01

We asked the same 60 questions using DRS (digital reference services) in Japanese public libraries, face-to-face reference services and Q & A (question and answer) sites. It was found that: (1) The correct answer ratio of DRS is higher than that of Q & A sites; (2) DRS takes longer to provide answers as compared to Q & A sites; and (3)…

Outstanding Science Trade Books for Students K-12.

ERIC Educational Resources Information Center

Science Teacher, 2003

2003-01-01

Presents outstanding science trade books published in 2002 for students in grades K-12. Sections include Archaeology, Anthropology, and Paleontology; Biography; Environment and Ecology; Life Science; Physical Science; and Science-Related Careers. (KHR)

Teacher Perception of Barriers and Benefits in K-12 Technology Usage

ERIC Educational Resources Information Center

Carver, Lin B.

2016-01-01

This study explores K-12 teachers' perceptions of the benefits and barriers to technology integration by either teachers or students in K-12 instruction. The sample was composed of 68 students enrolled in online classes in the graduate studies in education department of a small private liberal arts institution in the southeast. Data was collected…

Integrating Data Mining in Program Evaluation of K-12 Online Education

ERIC Educational Resources Information Center

Hung, Jui-Long; Hsu, Yu-Chang; Rice, Kerry

2012-01-01

This study investigated an innovative approach of program evaluation through analyses of student learning logs, demographic data, and end-of-course evaluation surveys in an online K-12 supplemental program. The results support the development of a program evaluation model for decision making on teaching and learning at the K-12 level. A case study…

Energy Retrofit for Aging K-12 Schools.

ERIC Educational Resources Information Center

3D/International, Houston, TX.

Successfully retrofitting aging K-12 schools using energy conservation measures (ECM) that can improve the physical plant and reduce energy consumption are explored. Topics explore how certain ECM measures can benefit educational facilities, why retrofitting begun sooner rather than later is important, how to finance the retrofit program, and the…

Student Success in Online K-12 Education

ERIC Educational Resources Information Center

Ronsisvalle, Tammy; Watkins, Ryan

2005-01-01

While online education has made great strides in recent years to become an accepted component of higher education, with many colleges now offering accredited online degree programs, the current opportunities and challenges of online K-12 education are still awash in the turbulent waters of regional politics, temperamental technologies, changing…

Development of an Attitude Scale to Assess K-12 Teachers' Attitudes toward Nanotechnology

NASA Astrophysics Data System (ADS)

Lan, Yu-Ling

2012-05-01

To maximize the contributions of nanotechnology to this society, at least 60 countries have put efforts into this field. In Taiwan, a government-funded K-12 Nanotechnology Programme was established to train K-12 teachers with adequate nanotechnology literacy to foster the next generation of Taiwanese people with sufficient knowledge in nanotechnology. In the present study, the Nanotechnology Attitude Scale for K-12 teachers (NAS-T) was developed to assess K-12 teachers' attitudes toward nanotechnology. The NAS-T included 23 Likert-scale items that can be grouped into three components: importance of nanotechnology, affective tendencies in science teaching, and behavioural tendencies to teach nanotechnology. A sample of 233 K-12 teachers who have participated in the K-12 Nanotechnology Programme was included in the present study to investigate the psychometric properties of the NAS-T. The exploratory factor analysis of this teacher sample suggested that the NAS-T was a three-factor model that explained 64.11% of the total variances. This model was also confirmed by the confirmatory factor analysis to validate the factor structure of the NAS-T. The Cronbach's alpha values of three NAS-T subscales ranged from 0.89 to 0.95. Moderate to strong correlations among teachers' NAS-T domain scores, self-perception of own nanoscience knowledge, and their science-teaching efficacy demonstrated good convergent validity of the NAS-T. As a whole, psychometric properties of the NAS-T indicated that this instrument is an effective instrument for assessing K-12 teachers' attitudes toward nanotechnology. The NAS-T will serve as a valuable tool to evaluate teachers' attitude changes after participating in the K-12 Nanotechnology Programme.

K-12 Students Flock To ToxTown In San Diego: Results of an SOT K-12 Education Outreach Workshop

EPA Science Inventory

Just prior to the start of the 2015 Annual Meeting in San Diego, hundreds of K-12 students, teachers, and science enthusiasts visited the ToxTown booth at the annual San Diego Festival of Science and Engineering grand finale event, EXPO Day. Over 20,000 attendees participated in ...

Draft reference grid cells for emergency response reconnaissance developed for use by the US Environmental Protection Agency [ER.QUADS6K_EPA

EPA Pesticide Factsheets

Draft reference grid cells for emergency response reconnaissance developed for use by the US Environmental Protection Agency. Grid cells are based on densification of the USGS Quarterquad (1:12,000 scale or 12K) grids for the continental United States, Alaska, Hawaii and Puerto Rico and are roughly equivalent to 1:6000 scale (6K) quadrangles approximately 2 miles long on each side. Note: This file is >80MB in size. Regional subsets have been created from this national file that include a 20 mile buffer of tiles around each EPA Region. To access the regional subsets, go to http://geodata.epa.gov/OSWER/6kquads_epa.zip and select the name of the file that corresponds to your region of interest (e.g. 6kquadr1.zip is the name of the file created for EPA Region 1).

A Framework for Quality K-12 Engineering Education: Research and Development

ERIC Educational Resources Information Center

Moore, Tamara J.; Glancy, Aran W.; Tank, Kristina M.; Kersten, Jennifer A.; Smith, Karl A.; Stohlmann, Micah S.

2014-01-01

Recent U.S. national documents have laid the foundation for highlighting the connection between science, technology, engineering and mathematics at the K-12 level. However, there is not a clear definition or a well-established tradition of what constitutes a quality engineering education at the K-12 level. The purpose of the current work has been…

Policy Shop Casts Long K-12 Shadow

ERIC Educational Resources Information Center

Ujifusa, Andrew

2012-01-01

In nearly 40 years of legislative advocacy, the American Legislative Exchange Council (ALEC)--a free-market, limited-government group now drawing intense scrutiny for its support of a controversial self-defense law--has had a significant influence on K-12 education through its model legislation and work with state lawmakers to promote such…

What Matters to Career K-12 Educators

ERIC Educational Resources Information Center

Harris, Mary M.

2014-01-01

Case studies about issues arising from education policy were written between 2003 and 2011 by doctoral candidates in Curriculum and Instruction who were career K-12 educators. Literary analysis was employed in grouping 57 case studies, which described primarily situations that occurred in school districts in one large metropolitan area, by topic…

Inspiring the Next Generation: Astronomy Catalyzes K12 STEM Education

NASA Astrophysics Data System (ADS)

Borders, Kareen; Thaller, Michelle; Winglee, Robert; Borders, Kyla

2017-06-01

K-12 educators need effective and relevant astronomy professional development. NASA's Mission Science provides innovative and accessible opportunities for K-12 teachers. Science questions involve scale and distance, including Moon/Earth scale, solar system scale, and distance of objects in the universe. Teachers can gain an understanding of basic telescopes, the history of telescopes, ground and satellite based telescopes, and models of JWST Telescope. An in-depth explanation of JWST and Spitzer telescopes gave participants background knowledge for infrared astronomy observations. During teacher training, we taught the electromagnetic spectrum through interactive stations. The stations included an overview via lecture and power point, the use of ultraviolet beads to determine ultraviolet exposure, the study of lenticulars and diagramming of infrared data, looking at visible light through diffraction glasses and diagramming the data, protocols for using astronomy based research in the classroom, and infrared thermometers to compare environmental conditions around the observatory. An overview of LIDAR physics was followed up by a simulated LIDAR mapping of the topography of Mars.We will outline specific steps for K-12 infrared astronomy professional development, provide data demonstrating the impact of the above professional development on educator understanding and classroom use, and detail future plans for additional K-12 professional development.Funding was provided by Washington STEM, NASA, and the Washington Space Grant Consortium.

Effect of endogenous reference genes on digital PCR assessment of genetically engineered canola events.

PubMed

Demeke, Tigst; Eng, Monika

2018-05-01

Droplet digital PCR (ddPCR) has been used for absolute quantification of genetically engineered (GE) events. Absolute quantification of GE events by duplex ddPCR requires the use of appropriate primers and probes for target and reference gene sequences in order to accurately determine the amount of GE materials. Single copy reference genes are generally preferred for absolute quantification of GE events by ddPCR. Study has not been conducted on a comparison of reference genes for absolute quantification of GE canola events by ddPCR. The suitability of four endogenous reference sequences ( HMG-I/Y , FatA(A), CruA and Ccf) for absolute quantification of GE canola events by ddPCR was investigated. The effect of DNA extraction methods and DNA quality on the assessment of reference gene copy numbers was also investigated. ddPCR results were affected by the use of single vs. two copy reference genes. The single copy, FatA(A), reference gene was found to be stable and suitable for absolute quantification of GE canola events by ddPCR. For the copy numbers measured, the HMG-I/Y reference gene was less consistent than FatA(A) reference gene. The expected ddPCR values were underestimated when CruA and Ccf (two copy endogenous Cruciferin sequences) were used because of high number of copies. It is important to make an adjustment if two copy reference genes are used for ddPCR in order to obtain accurate results. On the other hand, real-time quantitative PCR results were not affected by the use of single vs. two copy reference genes.

The Shorewood Collection Art Reference Guide.

ERIC Educational Resources Information Center

1992

This reference guide contains a descriptive critique of each of more than 900 images of paintings and drawings presented in "The Shorewood Collection." This guide is intended to be used as a reference tool in conjunction with Shorewood's art educational programs, which range from grade levels K through 12. Master works from major epochs in the…

The SERC K12 Educators Portal to Teaching Activities and Pedagogic Approaches

NASA Astrophysics Data System (ADS)

Larsen, K.; Kirk, K. B.; Manduca, C. A.; Ledley, T. S.; Schmitt, L.

2013-12-01

The Science Education Resource Center (SERC) has created a portal to information for K12 educators to provide high-quality grade level appropriate materials from a wide variety of projects and topics. These materials were compiled across the SERC site, showcasing materials that were created for, or easily adaptable to, K12 classrooms. This resource will help support implementation of Next Generation Science Standards by assisting educators in finding innovative resources to address areas of instruction that are conceptually different than previous national and state science standards. Specifically, the K12 portal assists educators in learning about approaches that address the cross-cutting nature of science concepts, increasing students quantitative reasoning and numeracy skills, incorporating technology such as GIS in the classroom, and by assisting educators of all levels of K12 instruction in using relevant and meaningful ways to teach science concepts. The K12 portal supports educators by providing access to hundreds of teaching activities covering a wide array of science topics and grade levels many of which have been rigorously reviewed for pedagogic quality and scientific accuracy. The portal also provides access to web pages that enhance teaching practices that help increase student's system thinking skills, make lectures interactive, assist instructors in conducting safe and effective indoor and outdoor labs, providing support for teaching energy and climate literacy principles, assisting educators in addressing controversial content, provide guidance in engaging students affective domain, and provides a collection of tools for making teaching relevant in 21st century classrooms including using GIS, Google Earth, videos, visualizations and simulations to model and describe scientific concepts. The portal also provides access to material for specific content and audiences by (1) Supporting AGIs 'Map your World' week to specifically highlight teaching

Quality Control in K-12 Digital Learning: Three (Imperfect) Approaches. Creating Healthy Policy for Digital Learning. A Working Paper Series from the Thomas B. Fordham Institute

ERIC Educational Resources Information Center

Hess, Frederick M.

2011-01-01

Digital learning makes possible the "unbundling" of school provisions--that is, it allows children to be served by providers from almost anywhere, in new and more customized ways. At the same time, because it destandardizes and decentralizes educational delivery, digital education is far harder to bring under the yoke of the…

[Carcinogenesis and its mechanism of mutant-type[12Asp]K-ras4B gene].

PubMed

Gui, Li-ming; Wei, Li-hui; Zhang, Ying-mei; Wang, Jian-liu; Wang, Ying; Chen, Ying; Ma, Da-long

2002-01-01

Ras gene plays an important role in the extra- and intra-cellular signal transduction pathway. It mediates series cascade reactions, and eventually actives transcriptional factors in nucleus. It is unknown on the mechanism of carcinogenesis of Ras gene in endometrial carcinoma, though K-ras mutant is very common in endometrial atypical hyperplasia and carcinoma. On basis of discovering the mutation in 12th codon of K-ras in endometrial carcinoma cell line, HEC-1A, we explored the carcinogenesis and molecular mechanism of mutant-type [12Asp] K-ras4B gene. (1) Full-length [12Asp]K-ras4B cDNA was amplified with RT-PCR, then inserted into pcDI eukaryotic expressive vector. (2) Morphological change, growth kinetics in vitro and tumorigencity in nude mice in vivo after-before transfection were observed. (3) To test the cell growth kinetics by methyl thiazolium tetrazolium (MTT) and [3H]thymidine incorporation method. (1) The authors have successfully constructed eukaryotic expression plasmid pcDI-[12Asp] K-ras4B; (2) To confirm that [12Asp] K-ras4B mutant can trigger the neoplastic transformation of NIH3T3 cells by test in vitro and in vivo. (3) After pMCV-RasN17 plasmid, a Ras mutant were transfected into pcDI-[12Asp] K-ras4B cells, the growth of this cell were restrained significantly in comparison with control group. (4) These findings indicate the expression of RafS621A resulted in remarkable inhibition in proliferation of pcDI-[12Asp]K-ras4B cell (P < 0.05). However, RafCAAX mutant can enhance pcDI-[12Asp]K-ras4B cell growth (P < 0.05). (1) [12Asp]K-ras4B gene alone is able to cause neoplastic transformation in NIH3T3 cells in vitro and in vivo. (2) [12Asp]K-ras4B-induced NIH3T3 cells neoplastic transformation required Raf signaling pathway.

Enriching K-12 Science and Mathematics Education Using LEGOs

ERIC Educational Resources Information Center

Williams, Keeshan; Igel, Irina; Poveda, Ronald; Kapila, Vikram; Iskander, Magued

2012-01-01

This paper presents a series of illustrative LEGO Mindstorms-based science and math activities, developed under an NSF GK-12 Fellows project, for elementary, middle, and high school grades. The activities, developed by engineering and science graduate Fellows in partnership with K-12 teachers, are grade appropriate, address pertinent learning…

A Critique of the Brave New World of K-12 Education

ERIC Educational Resources Information Center

Salmani Nodoushan, Mohammad Ali

2008-01-01

Over the past few decades life style has changed so rapidly that remote areas of the Earth are now inhabited by human beings. Technology has also developed and people can stay at home and have access to virtual schools. This has stimulated the need for K-12 Education. K-12 education has emerged from the no-child-left-behind concerns of governments…

Approaching K-12 Online Education in Pennsylvania

ERIC Educational Resources Information Center

Vadell, Kathryn

2013-01-01

The purpose of this study is to determine how K-12 schools are addressing the need to accommodate online learners in Pennsylvania. It is built upon a review of literature focusing on educational legislation, the personalization of online learning and online learning solutions. The study posed 21 questions utilizing a mixed methods approach to…

SENDIT: North Dakota's K-12 Telecommunications Network.

ERIC Educational Resources Information Center

Sackman, Gleason

SENDIT is a telecommunications network for North Dakota educators and students in the K-12 environment. Through SENDIT, both teachers and students have access to the Internet, and some of the isolation associated with the rurality of North Dakota has been diminished. SENDIT was developed by the North Dakota State University School of Education and…

Reading: Exceptional Child Education Curriculum K-12.

ERIC Educational Resources Information Center

Biddle, Candace Thornton; And Others

This K-12 reading curriculum for exceptional child education is arranged in a format comparable to the general education curriculum, and is sequenced in the order in which most children learn. The curriculum begins with a list of 123 objectives of the reading program. The objectives cover the areas of perceptual skills, word attack, structural…

Ballot Measures Reflect K-12 Funding Jitters

ERIC Educational Resources Information Center

Klein, Alyson

2010-01-01

In an election year dominated by the pitched battle for Congress and major governors' races, state ballot measures involving education are largely tied to a similar theme: the burden of funding K-12 programs when state finances are shaky. In some cases, initiatives, constitutional amendments, and other ballot measures seek to tap new sources of…

Virtual K-12 Leadership: A Postmodern Paradigm

ERIC Educational Resources Information Center

Tucker, Tommy N.

2014-01-01

This phenomenological, mixed-method study compared and contrasted virtual K-12 school leadership with traditional face-to-face leadership. All 106 participants served for a minimum of two years in each setting. The study was conducted in two phases in order to reveal consensus and dissensus points of view. Conceptually, a postmodern framework was…

Adaptation of reference volumes for correlation-based digital holographic particle tracking

NASA Astrophysics Data System (ADS)

Hesseling, Christina; Peinke, Joachim; Gülker, Gerd

2018-04-01

Numerically reconstructed reference volumes tailored to particle images are used for particle position detection by means of three-dimensional correlation. After a first tracking of these positions, the experimentally recorded particle images are retrieved as a posteriori knowledge about the particle images in the system. This knowledge is used for a further refinement of the detected positions. A transparent description of the individual algorithm steps including the results retrieved with experimental data complete the paper. The work employs extraordinarily small particles, smaller than the pixel pitch of the camera sensor. It is the first approach known to the authors that combines numerical knowledge about particle images and particle images retrieved from the experimental system to an iterative particle tracking approach for digital holographic particle tracking velocimetry.

Previous radiographic experience of children referred for dental extractions under general anaesthesia in the U.K.

PubMed

Young, N L; Rodd, H D; Craig, S A

2009-03-01

To determine what proportion of children undergo radiographic assessment prior to referral to a dental hospital for extractions under general anaesthesia. This prospective survey was conducted over a 6-month period. A data sheet was used to record the following information: patient's age; referrer's name and place of work (general dental practice or community dental service); teeth to be extracted (primary dentition and/or permanent dentition) and reported previous radiographic examination. Patients were excluded from the study if, following a clinical examination, radiographs were not actually deemed necessary for diagnosis and treatment planning purposes. Clinical setting A paediatric dentistry clinic within a dental hospital in the North of England. Participants 161 patients with a mean age of six years (SD = 2.2, range = 3-14 years) who were referred to the dental hospital for extractions under general anaesthesia. Overall, 12.4% of children had reportedly undergone a previous radiographic assessment prior to hospital referral. A significantly greater proportion of children referred for permanent tooth extractions had been subject to radiographic examination compared to children referred for primary tooth extractions (46.2% as compared to 6.3%; P = 0.001 chi-squared test). Furthermore, patients referred from the community dental service were significantly more likely to have had previous dental radiographs than children referred from general dental practice (36.9% compared to 9.3%; P = 0.003 chi-squared test). Radiographs do not appear to be routinely employed for caries diagnosis and treatment planning in young children within general dental practice in the U.K.

Apparatus for the measurement of electrical resistivity, Seebeck coefficient, and thermal conductivity of thermoelectric materials between 300 K and 12 K

NASA Astrophysics Data System (ADS)

Martin, Joshua; Nolas, George S.

2016-01-01

We have developed a custom apparatus for the consecutive measurement of the electrical resistivity, the Seebeck coefficient, and the thermal conductivity of materials between 300 K and 12 K. These three transport properties provide for a basic understanding of the thermal and electrical properties of materials. They are of fundamental importance in identifying and optimizing new materials for thermoelectric applications. Thermoelectric applications include waste heat recovery for automobile engines and industrial power generators, solid-state refrigeration, and remote power generation for sensors and space probes. The electrical resistivity is measured using a four-probe bipolar technique, the Seebeck coefficient is measured using the quasi-steady-state condition of the differential method in a 2-probe arrangement, and the thermal conductivity is measured using a longitudinal, multiple gradient steady-state technique. We describe the instrumentation and the measurement uncertainty associated with each transport property, each of which is presented with representative measurement comparisons using round robin samples and/or certified reference materials. Transport properties data from this apparatus have supported the identification, development, and phenomenological understanding of novel thermoelectric materials.

Web Connects K-12 Students with Scientists

ERIC Educational Resources Information Center

Cavanagh, Sean

2009-01-01

This article reports that Derek Cummings and Justin Lessler, Johns Hopkins University epidemiologists, have come to the Johns Hopkins Center for Talented Youth (CTY) to give a live webinar on the spread of swine flu. This web-based audio and video presentation is one of many efforts by universities and science organizations to put K-12 students in…

12 CFR Appendix K to Part 1022 - Summary of Consumer Rights

Code of Federal Regulations, 2012 CFR

2012-01-01

... 12 Banks and Banking 8 2012-01-01 2012-01-01 false Summary of Consumer Rights K Appendix K to Part 1022 Banks and Banking BUREAU OF CONSUMER FINANCIAL PROTECTION FAIR CREDIT REPORTING (REGULATION V) Pt. 1022, App. K Appendix K to Part 1022—Summary of Consumer Rights The prescribed form for this summary is...

12 CFR Appendix K to Part 1022 - Summary of Consumer Rights

Code of Federal Regulations, 2014 CFR

2014-01-01

... 12 Banks and Banking 8 2014-01-01 2014-01-01 false Summary of Consumer Rights K Appendix K to Part 1022 Banks and Banking BUREAU OF CONSUMER FINANCIAL PROTECTION FAIR CREDIT REPORTING (REGULATION V) Pt. 1022, App. K Appendix K to Part 1022—Summary of Consumer Rights The prescribed form for this summary is...

12 CFR Appendix K to Part 1022 - Summary of Consumer Rights

Code of Federal Regulations, 2013 CFR

2013-01-01

... 12 Banks and Banking 8 2013-01-01 2013-01-01 false Summary of Consumer Rights K Appendix K to Part 1022 Banks and Banking BUREAU OF CONSUMER FINANCIAL PROTECTION FAIR CREDIT REPORTING (REGULATION V) Pt. 1022, App. K Appendix K to Part 1022—Summary of Consumer Rights The prescribed form for this summary is...

The influence of excess K2O on the electrical properties of (K,Na)1/2Bi1/2TiO3 ceramics

NASA Astrophysics Data System (ADS)

Li, Linhao; Li, Ming; Sinclair, Derek C.

2018-04-01

The solid solution (KxNa0.50-x)Bi0.50TiO3 (KNBT) between Na1/2Bi1/2TiO3 and K1/2Bi1/2TiO3 (KBT) has been extensively researched as a candidate lead-free piezoelectric material because of its relatively high Curie temperature and good piezoelectric properties, especially near the morphotropic phase boundary (MPB) at x ˜ 0.10 (20 mol. % KBT). Here, we show that low levels of excess K2O in the starting compositions, i.e., (Ky+0.03Na0.50-y)Bi0.50TiO3.015 (y-series), can significantly change the conduction mechanism and electrical properties compared to a nominally stoichiometric KNBT series (KxNa0.50-x)Bi0.50TiO3 (x-series). Impedance spectroscopy measurements reveal significantly higher bulk conductivity (σb) values for y ≥ 0.10 samples [activation energy (Ea) ≤ 0.95 eV] compared to the corresponding x-series samples which possess bandgap type electronic conduction (Ea ˜ 1.26-1.85 eV). The largest difference in electrical properties occurs close to the MPB composition (20 mol. % KBT) where y = 0.10 ceramics possess σb (at 300 °C) that is 4 orders of magnitude higher than that of x = 0.10 and the oxide-ion transport number in the former is ˜0.70-0.75 compared to <0.05 in the latter (between 600 and 800 °C). The effect of excess K2O can be rationalised on the basis of the (K + Na):Bi ratio in the starting composition prior to ceramic processing. This demonstrates the electrical properties of KNBT to be sensitive to low levels of A-site nonstoichiometry and indicates that excess K2O in KNBT starting compositions to compensate for volatilisation can lead to undesirable high dielectric loss and leakage currents at elevated temperatures.

Outstanding Science Trade Books for Students K-12.

ERIC Educational Resources Information Center

Science and Children, 2002

2002-01-01

Introduces a list of outstanding science trade books for grade levels K-12 in the areas of Archaeology, Anthropology, Paleontology, Biography, Life Sciences, Integrated Science, Physical Science, Science Related Careers, and Technology and Engineering. Includes information on the selection process. (YDS)

Green Power Partnership Top 30 K-12 Schools

EPA Pesticide Factsheets

The U.S. EPA's Green Power Partnership is a voluntary program designed to reduce the environmental impact of electricity generation by promoting renewable energy. On this list are the largest green power users among K-12 school partners within the GPP.

Engaging Scientists in NASA Education and Public Outreach: K - 12 Formal Education

NASA Astrophysics Data System (ADS)

Bartolone, Lindsay; Smith, D. A.; Eisenhamer, B.; Lawton, B. L.; Universe Professional Development Collaborative, Multiwavelength; NASA Data Collaborative, Use of; SEPOF K-12 Formal Education Working Group; E/PO Community, SMD

2014-01-01

The NASA Science Education and Public Outreach Forums support the NASA Science Mission Directorate (SMD) and its education and public outreach (E/PO) community through a coordinated effort to enhance the coherence and efficiency of SMD-funded E/PO programs. The Forums foster collaboration between scientists with content expertise and educators with pedagogy expertise. We present opportunities for the astronomy community to participate in collaborations supporting the NASA SMD efforts in the K - 12 Formal Education community. Members of the K - 12 Formal Education community include classroom educators, homeschool educators, students, and curriculum developers. The Forums’ efforts for the K - 12 Formal Education community include a literature review, appraisal of educators’ needs, coordination of audience-based NASA resources and opportunities, professional development, and support with the Next Generation Science Standards. Learn how to join in our collaborative efforts to support the K - 12 Formal Education community based upon mutual needs and interests.

Rethinking Workplace Learning in the Digital World: A Case Study of Open Badges

ERIC Educational Resources Information Center

Eaglen Bertrando, Sharen Linn

2017-01-01

The purpose of this collective case study was to explore digital badging in educational institutions as support for K-12 practitioners struggling to integrate technology into pedagogical practices. The researcher conducted a mixed-method study that captured perceptions about digital badges and follow-up interviews with selected badge users to…

Evaluation of the National Science Foundation Graduate Teaching Fellows in K-12 Education (GK-12) Program.

ERIC Educational Resources Information Center

Mitchell, Julia; Levine, Roger; Gonzalez, Raquel; Bitter, Catherine; Webb, Norman; White, Paul

The GK-12 program of the National Science Foundation is an innovative program for enriching the value of graduate and advanced undergraduate students' education while simultaneously enriching science and mathematics teaching at the K-12 level. GK-12 is a fellowship program that offers graduate students and advanced undergraduates the opportunity…

Technical Feasibility Study for Zero Energy K-12 Schools

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pless, Shanti D.; Torcellini, Paul A.; Bonnema, Eric

A simulation-based technical feasibility study was completed to show the types of technologies required to achieve ZEB status with this building type. These technologies are prioritized across the building's subsystem such that design teams can readily integrate the ideas. Energy use intensity (EUI) targets were established for U.S. climate zones such that K-12 schools can be zero-ready or can procure solar panels or other renewable energy production sources to meet the zero energy building definition. Results showed that it is possible for K-12 schools to achieve zero energy when the EUI is between 20 and 26 kBtu/ft2/yr. Temperate climates requiredmore » a smaller percentage of solar panel coverage than very hot or very cold climates. The paper provides a foundation for technically achieving zero energy schools with a vision of transforming the school construction market to mainstream zero energy buildings within typical construction budgets.« less

Structure and Differentiated Electrical Characteristics of M1/2La1/2Cu3Ti4O12 (M = Li, Na, K) Ceramics Prepared by Sol-Gel Method

NASA Astrophysics Data System (ADS)

Liu, Zhanqing; Yang, Zupei

2017-10-01

New M1/2La1/2Cu3Ti4O12 (M = Li, Na, K) ceramics based on partial substitution of Li+, Na+, and K+ for La3+ in La2/3Cu3Ti4O12 (LCTO) have been prepared by a sol-gel method, and the effects of Li+, Na+, and K+ on the microstructure and electrical properties investigated in detail, revealing different results depending on the substituent. The cell parameter increased with increasing radius of the substituent ion (Li+, Na+, K+). Li1/2La1/2Cu3Ti4O12 (LLCTO) ceramic showed better frequency and temperature stability, but the dielectric constant decreased and the third abnormal dielectric peak disappeared from the dielectric temperature spectrum. Na1/2La1/2Cu3Ti4O12 (NLCTO) ceramic exhibited higher dielectric constant and better frequency and temperature stability, and displayed the second dielectric relaxation in electric modulus plots. The performance of K1/2La1/2Cu3Ti4O12 (KLCTO) ceramic was deteriorated. These different microstructures and electrical properties may be due to the effect of different defect structures generated in the ceramic as well as grain size. This work represents the first analysis and comparison of these remarkable differences in the electrical behavior of ceramics obtained by partial substitution of Li+, Na+, and K+ for La3+ in LCTO.

Sol-gel synthesis of K{sub 3}InF{sub 6} and structural characterization of K{sub 2}InC{sub 10}O{sub 10}H{sub 6}F{sub 9}, K{sub 3}InC{sub 12}O{sub 14}H{sub 4}F{sub 18} and K{sub 3}InC{sub 12}O{sub 12}F{sub 18}

DOE Office of Scientific and Technical Information (OSTI.GOV)

Labeguerie, Jessica; Gredin, Patrick; Marrot, Jerome

2005-10-15

K{sub 3}InF{sub 6} is synthesized by a sol-gel route starting from indium and potassium acetates dissolved in isopropanol in the stoichiometry 1:3, with trifluoroacetic acid as fluorinating agent. The crystal structures of the organic precursors were solved by X-ray diffraction methods on single crystals. Three organic compounds were isolated and identified: K{sub 2}InC{sub 10}O{sub 10}H{sub 6}F{sub 9}, K{sub 3}InC{sub 12}O{sub 14}H{sub 4}F{sub 18} and K{sub 3}InC{sub 12}O{sub 12}F{sub 18}. The first one, deficient in potassium in comparison with the initial stoichiometry, is unstable. In its crystal structure, acetate as well as trifluoroacetate anions are coordinated to the indium atom. Themore » two other precursors are obtained, respectively, by quick and slow evaporation of the solution. They correspond to the final organic compounds, which give K{sub 3}InF{sub 6} by decomposition at high temperature. The crystal structure of K{sub 3}InC{sub 12}O{sub 14}H{sub 4}F{sub 18} is characterized by complex anions [In(CF{sub 3}COO){sub 4}(OH{sub x}){sub 2}]{sup (5-2x)-} and isolated [CF{sub 3}COOH{sub 2-x}]{sup (x-1)-} molecules with x=2 or 1, surrounded by K{sup +} cations. The crystal structure of K{sub 3}InC{sub 12}O{sub 12}F{sub 18} is only constituted by complex anions [In(CF{sub 3}COO){sub 6}]{sup 3-} and K{sup +} cations. For all these compounds, potassium cations ensure only the electroneutrality of the structure. IR spectra of K{sub 2}InC{sub 10}O{sub 10}H{sub 6}F{sub 9} and K{sub 3}InC{sub 12}O{sub 12}F{sub 18} were also performed at room temperature on pulverized crystals.« less

Splicing the Divide: A Review of Research on the Evolving Digital Divide among K-12 Students

ERIC Educational Resources Information Center

Dolan, Jennifer E.

2016-01-01

The digital divide has narrowed with regard to one definition of access to technology--the binary view of the "haves" and "have-nots." However, use of technology at home and in school is not equitable for all students. According to recent literature, a broader and more nuanced definition of the technological divide is necessary…

K-12 Education Nonprofit Employees' Perceptions of Strategies for Recruiting and Retaining Employees

ERIC Educational Resources Information Center

Byrne, Tara Marie

2013-01-01

This qualitative study explored the key reasons individuals who work in K-12 education nonprofit organizations enter the field of K-12 nonprofit education and their motivations for doing so. The purpose of this study was to find new strategies for recruiting and retaining K-12 education nonprofit employees by examining the obstacles that exist to…

The Green Pages: Environmental Education Activities K-12.

ERIC Educational Resources Information Center

Clearing, 1990

1990-01-01

Presented are 20 science activities for students K-12. Topics include role playing, similarities between urban and forest communities, ecosystems, garbage, recycling, food production, habitats, insects, tidal zone, animals, diversity, interest groups, rivers, spaceship earth, ecological interactions, and the cost of recreation. (KR)

Leveraging Digital Technology in Social Studies Education

ERIC Educational Resources Information Center

Lundy, Sarah Elizabeth

2014-01-01

Today's K-12 classrooms are increasingly comprised of students who accomplish much of their informal learning through digital media and technology. In response, a growing number of educators are considering how they might draw upon these informal learning experiences to support student engagement and learning in the classroom through technology.…

Development of K-12 Engineering Outreach Materials

NASA Technical Reports Server (NTRS)

Jordan, William

2003-01-01

Six modules were created that can be used in K-12 classes to introduce students to what engineers can do at NASA.The purpose of this project was to create outreach materials for the classroom. To make it appealing to students, many color NASA photographs are used to illustrate NASA applications.Student experiments are described that can be performed to illustrate topics.

Development of the Advanced Energy Design Guide for K-12 Schools -- 50% Energy Savings

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bonnema, E.; Leach, M.; Pless, S.

2013-02-01

This Technical Support Document (TSD) describes the process and methodology for the development of the Advanced Energy Design Guide for K-12 School Buildings: Achieving 50% Energy Savings Toward a Net Zero Energy Building (AEDG-K12) (ASHRAE et al. 2011a). The AEDG-K12 provides recommendations for achieving 50% whole-building energy savings in K-12 schools over levels achieved by following ANSI/ASHRAE/IESNA Standard 90.1-2004, Energy Standard for Buildings Except Low-Rise Residential Buildings (Standard 90.1-2004) (ASHRAE 2004b). The AEDG-K12 was developed in collaboration with the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), the American Institute of Architects (AIA), the Illuminating Engineering Society of Northmore » America (IES), the U.S. Green Building Council (USGBC), and the U.S. Department of Energy (DOE).« less

Development and Evaluation of Food Safety Modules for K-12 Science Education

ERIC Educational Resources Information Center

Chapin, Travis K.; Pfuntner, Rachel C.; Stasiewicz, Matthew J.; Wiedmann, Martin; Orta-Ramirez, Alicia

2015-01-01

Career and educational opportunities in food science and food safety are underrecognized by K-12 students and educators. Additionally, misperceptions regarding nature of science understanding persist in K-12 students despite being emphasized as an important component of science education for over 100 y. In an effort to increase awareness…

The Green Pages: Environmental Education Activities K-12.

ERIC Educational Resources Information Center

Clearing, 1990

1990-01-01

Presented are 37 environmental science activities for students in grades K-12. Topics include water pollution, glaciers, protective coloration, shapes in nature, environmental impacts, recycling, creative writing, litter, shapes found in nature, color, rain cycle, waste management, plastics, energy, pH, landfills, runoff, watersheds,…

The Green Pages: Environmental Education Activities K-12.

ERIC Educational Resources Information Center

Clearing, 1991

1991-01-01

Presented are 38 environmental education activities for grades K-12. Topics include seed dispersal, food chains, plant identification, sizes and shapes, trees, common names, air pollution, recycling, temperature, litter, water conservation, photography, insects, urban areas, diversity, natural cycles, rain, erosion, phosphates, human population,…

Outstanding Science Trade Books for Students K-12

ERIC Educational Resources Information Center

Science Teacher, 2016

2016-01-01

Science teachers and mentors continue to be challenged to meet the high expectations of "A Framework for K-12 Science Education" and the "Next Generation Science Standards." Indeed the Framework urges teachers to help learners "[build] progressively more sophisticated explanations of natural phenomena..." while the…

A comparison of digital tomosynthesis and chest radiography in evaluating airway lesions using computed tomography as a reference.

PubMed

Choo, Ji Yung; Lee, Ki Yeol; Yu, Ami; Kim, Je-Hyeong; Lee, Seung Heon; Choi, Jung Won; Kang, Eun-Young; Oh, Yu Whan

2016-09-01

To compare the diagnostic performance of digital tomosynthesis (DTS) and chest radiography for detecting airway abnormalities, using computed tomography (CT) as a reference. We evaluated 161 data sets from 149 patients (91 with and 70 without airway abnormalities) who had undergone radiography, DTS, and CT to detect airway problems. Radiographs and DTS were evaluated to localize and score the severity of the airway abnormalities, and to score the image quality using CT as a reference. Receiver operating characteristics (ROC), McNemar's test, weighted kappa, and the paired t-test were used for statistical analysis. The sensitivity of DTS was higher (reader 1, 93.51 %; reader 2, 94.29 %) than chest radiography (68.83 %; 71.43 %) in detecting airway lesions. The diagnostic accuracy of DTS (90.91 %; 94.70 %) was also significantly better than that of radiography (78.03 %; 82.58 %, all p < 0.05). DTS image quality was significantly better than chest radiography (1.83, 2.74; p < 0.05) in the results of both readers. The inter-observer agreement with respect to DTS findings was moderate and superior when compared to radiography findings. DTS is a more accurate and sensitive modality than radiography for detecting airway lesions that are easily obscured by soft tissue structures in the mediastinum. • Digital tomosynthesis offers new diagnostic options for airway lesions. • Digital tomosynthesis is more sensitive and accurate than radiography for airway lesions. • Digital tomosynthesis shows better image quality than radiography. • Assessment of lesion severity, via tomosynthesis is comparable to computed tomography.

State P-20 Councils and Collaboration between K-12 and Higher Education

ERIC Educational Resources Information Center

Rippner, Jennifer A.

2017-01-01

For decades, numerous observers have agreed on the value of collaboration between K-12 and higher education--especially as these sectors work toward increasing college readiness and success. While most states maintain separate agencies for K-12 and higher education, many states have worked to foster collaboration through state P-20 councils.…

K-Ras Populates Conformational States Differently from Its Isoform H-Ras and Oncogenic Mutant K-RasG12D.

PubMed

Parker, Jillian A; Volmar, Alicia Y; Pavlopoulos, Spiro; Mattos, Carla

2018-06-05

Structures of wild-type K-Ras from crystals obtained in the presence of guanosine triphosphate (GTP) or its analogs have remained elusive. Of the K-Ras mutants, only K-RasG12D and K-RasQ61H are available in the PDB representing the activated form of the GTPase not in complex with other proteins. We present the crystal structure of wild-type K-Ras bound to the GTP analog GppCH 2 p, with K-Ras in the state 1 conformation. Signatures of conformational states obtained by one-dimensional proton NMR confirm that K-Ras has a more substantial population of state 1 in solution than H-Ras, which predominantly favors state 2. The oncogenic mutant K-RasG12D favors state 2, changing the balance of conformational states in favor of interactions with effector proteins. Differences in the population of conformational states between K-Ras and H-Ras, as well as between K-Ras and its mutants, can provide a structural basis for focused targeting of the K-Ras isoform in cancer-specific strategies. Copyright © 2018 Elsevier Ltd. All rights reserved.

Changes in K-12 Education: Implications for the BC Post-Secondary System

ERIC Educational Resources Information Center

McQuarrie, Fiona A. E.

2016-01-01

It is generally assumed by educators that the K-12 curriculum--the curriculum used in primary, elementary, and secondary education--will affect students' post-secondary educational experiences and their ability to enter the workforce. This report takes a multi-faceted approach to addressing the impact of changes in the K-12 curriculum on students'…

Review of the National Research Council's Framework for K-12 Science Education

ERIC Educational Resources Information Center

Gross, Paul R.

2011-01-01

The new "Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas" is a big, comprehensive volume, carefully organized and heavily documented. It is the long-awaited product of the Committee on a Conceptual Framework for New K-12 Science Education Standards. As noted, it is a weighty document (more than 300…

K-12 Online Learning and the Training Needs for School Psychology Practitioners

ERIC Educational Resources Information Center

Tysinger, P. Dawn; Tysinger, Jeff; Diamanduros, Terry; Kennedy, Kathryn

2013-01-01

K-12 online learning is growing at an exponential rate in the United States and around the world. Students and teachers are entering and embracing the K-12 online learning environment. Thus, it becomes imperative for school psychologists to follow. In order to offer the most productive learning environment for all students, the services provided…

21 CFR 1141.12 - Incorporation by reference of required warnings.

Code of Federal Regulations, 2013 CFR

2013-04-01

... SERVICES (CONTINUED) TOBACCO PRODUCTS CIGARETTE PACKAGE AND ADVERTISING WARNINGS Cigarette Package and Advertising Warnings § 1141.12 Incorporation by reference of required warnings. “Cigarette Required Warnings..., ATTN: Cigarette Warning File Requests, 9200 Corporate Blvd., Rockville, MD 20850, 1-877-CTP-1373, or...

It's Time to Turn the Digital Page: Preservice Teachers Explore E-Book Reading

ERIC Educational Resources Information Center

Larson, Lotta C.

2013-01-01

This article describes what happened when 49 preservice teachers participated in an e-book reading experience in order to prepare them to teach with e-books in K-12 classrooms. In addition to examining the preservice teachers' digital reading behaviors and dispositions, this manuscript also examines reader factors and text factors of digital texts…

Versatile all-digital time interval measuring system

NASA Astrophysics Data System (ADS)

Vyhlidal, David; Cech, Miroslav

2011-06-01

This paper describes a design and performance of a versatile all-digital time interval measuring system. The measurement method is based on an interpolation principle. In this principle the time interval is first roughly digitized by a coarse counter driven by a high stability reference clock and the fractions between the clock periods are measured by two Time-to-Digital Converter chips TDC-GPX manufactured by Acam messelectronic. Control circuits allow programmable customization of the system to satisfy many applications such as laser range finding, event counting, or time-of-flight measurements in various physics experiments. The system has two reference clocks inputs and two independent channels for measuring start and stop events. Only one 40 MHz reference is required for the measurement. The second reference can be, for example, 1 PPS (Pulse per Second) signal from a GPS (Global Positioning System) to time tag events. Time intervals are measured using the highest resolution mode of the TDC-GPX chips. The resolution of each chip is software programmable and is PLL (Phase Locked Loop) stabilized against temperature and voltage variations. The system can achieve a timing resolution better than 15 ps rms with up to 90 kHz repetition rate. The time interval measurement range is from 0 ps up to 1 second. The power consumption of the whole system is 18 W including an embedded computer board and an LCD (Liquid Crystal Display) screen. The embedded computer controls the whole system, collects and evaluates measurement data and with the display provides a user interface. The system is implemented using commercially available components.

A Model Project in Career Education, K-12. Interim Report, December 1974.

ERIC Educational Resources Information Center

Wyoming State Dept. of Education, Cheyenne.

The document presents an interim report of a project to establish career education programs for K-12 students in the Natrona County School District of Casper, Wyoming. Project activities were divided into: (1) career awareness, grades K-6; (2) career exploration, grades 7-9; (3) career preparation, grades 10-12; and (4) guidance. To meet the…

K-12 Teachers' Perceptions of School Policy and Fear of School Violence

ERIC Educational Resources Information Center

Ricketts, Melissa L.

2007-01-01

Since the 1990s, schools have focused their attention on policies designed to improve school safety. Most researches on school violence policies have concentrated on the needs of students and administrators. This study investigated the impact of school violence policies on K-12 teachers' fear. Using self-report data from 447 K-12 teachers from a…

Mapping the Terrain: Educational Leadership Field Experiences in K-12 Virtual Schools

ERIC Educational Resources Information Center

LaFrance, Jason A.; Beck, Dennis

2014-01-01

Opportunities for K-12 students to choose virtual and blended learning experiences continue to grow. All 50 states including Washington, D.C., now offer some virtual experience in K-12 education. Of these, 40 states have state virtual schools or state-led online learning initiatives. In addition, federal and state support for this type of learning…

Partnerships Between K-12 Schools and Universities: Who Benefits?

NASA Astrophysics Data System (ADS)

Regens, N.; Hall-Wallace, M. K.

2001-05-01

Collaborations between K-12 schools and universities for the purpose of improving science education are growing in number, but many question their effectiveness. After many years of outreach to local teachers, schools and districts, we have developed a collaboration that more effectively addresses school district goals and needs while providing university faculty and graduate students with real opportunities to contribute to science education in the schools. Funded by the NSF GK-12 program, we are working directly with school district curriculum specialists and classroom teachers to implement inquiry-based science investigations. Projects range from developing long-term research projects in middle and high school classrooms to assisting K-6 teachers in using kit-based science curriculum. As part of our program, we have gathered several types of data to document the impact of our efforts. Using surveys of knowledge and attitudes, we measured significant improvements in college student's knowledge and attitudes about inquiry teaching methods and the K-12 education system. Through analysis of the college student's journals, we have also documented critical elements of an effective collaboration. These journals, combined with evaluations by classroom teachers, provide evidence of how the program impacts the graduate students professionally. We have also surveyed classroom teachers to measure the impact of the college students on their attitudes about teaching science and the long-term impact of the collaboration on their classroom teaching.

A Coordinated Development Program for K-12 Schools.

ERIC Educational Resources Information Center

White, George; Morgan, Nicholas

1992-01-01

Given the lean times in education today, a coordinated fund-raising effort could highly benefit public K-12 education. An office of development could coordinate grant writing, interaction with foundations, corporate partnerships, the development of endowed chairs, and individual fund raising and manage local fund raisers. Development follows three…

West Bloomfield Schools Social Studies Curriculum K-12.

ERIC Educational Resources Information Center

Morse, James E.; And Others

The curriculum guide outlines behavioral objectives, learning activities, evaluation methods, and resources to help K-12 classroom teachers develop and implement social studies programs. Major objectives are to extend knowledge, develop skills to make effective use of this knowledge, and to facilitate the socialization process. The first section…

Foreign Language K-12. Program Evaluation 1991-92.

ERIC Educational Resources Information Center

Wadden, Jerry M.

The Des Moines (Iowa) Public Schools foreign language program for K-12 is described and evaluated. The evaluation report focuses on six areas, including: (1) school district mission and philosophy of foreign language instruction; (2) context (state policies and standards, foreign language program overview and enrollment, fiber-optic communication…

Outstanding Science Trade Books for Students K-12.

ERIC Educational Resources Information Center

Science Scope, 2002

2002-01-01

Presents a list of outstanding science trade books published in 2001 for use in the K-12 grade levels. Includes the areas of archaeology, anthropology, and paleontology; biography; life sciences; integrated science; physical sciences; science related careers; and technology and engineering. Provides information on the books and the selection…

Development of high precision digital driver of acoustic-optical frequency shifter for ROG

NASA Astrophysics Data System (ADS)

Zhang, Rong; Kong, Mei; Xu, Yameng

2016-10-01

We develop a high precision digital driver of the acoustic-optical frequency shifter (AOFS) based on the parallel direct digital synthesizer (DDS) technology. We use an atomic clock as the phase-locked loop (PLL) reference clock, and the PLL is realized by a dual digital phase-locked loop. A DDS sampling clock up to 320 MHz with a frequency stability as low as 10-12 Hz is obtained. By constructing the RF signal measurement system, it is measured that the frequency output range of the AOFS-driver is 52-58 MHz, the center frequency of the band-pass filter is 55 MHz, the ripple in the band is less than 1 dB@3MHz, the single channel output power is up to 0.3 W, the frequency stability is 1 ppb (1 hour duration), and the frequency-shift precision is 0.1 Hz. The obtained frequency stability has two orders of improvement compared to that of the analog AOFS-drivers. For the designed binary frequency shift keying (2-FSK) and binary phase shift keying (2-PSK) modulation system, the demodulating frequency of the input TTL synchronous level signal is up to 10 kHz. The designed digital-bus coding/decoding system is compatible with many conventional digital bus protocols. It can interface with the ROG signal detecting software through the integrated drive electronics (IDE) and exchange data with the two DDS frequency-shift channels through the signal detecting software.

Podcasting 101 for K-12 Librarians

ERIC Educational Resources Information Center

Eash, Esther Kreider

2006-01-01

Podcast is a digital recording of a radio broadcast or similar program made available on the Internet for downloading to a personal audio player. In other words, it's a digital audio file that is created, shared, and heard. The podcast is a viable alternative for delivering research content or lessons to students who need remedial or extended…

Final report on EURAMET.QM-K12: EURAMET key comparison on the determination of the mass fraction of creatinine in serum

NASA Astrophysics Data System (ADS)

Bell, David; Hopley, Chris; Ellison, Stephen L. R.; O'Connor, Gavin

2013-01-01

Creatinine is a well-known marker for the evaluation of kidney function. Its routine measurement is undertaken by many clinical laboratories and comparable results over distance and time are required for effective diagnosis. To address this need many National Measurement Institutes (or designated institutes) provide services in this area via the provision of higher order standards or reference measurements. The organic analysis working group of the consultative committee for amount of substance have conducted two previous key comparisons to assess the equivalence of institutes who provide such services. The purpose of this study was to enable institutes who missed the previous studies to demonstrate their capability for characterizing serum materials containing 1 µg/g to 100 µg/g of creatinine. The study material consisted of two lyophilized serum samples which were used in an external quality control proficiency testing scheme. No target values were available for these materials and all participants reported results within the one month timeframe given for analysis. Five institutes participated in the key study and a single institute submitted results for the parallel pilot study. All participants in the key study used isotope dilution with either gas or liquid chromatography coupled with mass spectrometry. The pilot study laboratory used a novel isotope dilution surface-enhanced Raman spectroscopy method. The comparison reference value for each material was set as the mean of all results submitted by those participating in the key study. The choice of the reference value estimator was constrained as it was deemed more appropriate to treat the data in a similar manner to CCQM-K12 if the relative degrees of equivalence were to be compared. This resulted in reference values of (54.27 ± 0.72) µg/g and (38.01 ± 0.42) µg/g for the two separate materials. The relative degrees of equivalence were calculated and these were compared with the relative degrees of

Digital Citizenship

ERIC Educational Resources Information Center

Isman, Aytekin; Canan Gungoren, Ozlem

2014-01-01

Era in which we live is known and referred as digital age.In this age technology is rapidly changed and developed. In light of these technological advances in 21st century, schools have the responsibility of training "digital citizen" as well as a good citizen. Digital citizens must have extensive skills, knowledge, Internet and …

Interlaboratory Reproducibility of Droplet Digital Polymerase Chain Reaction Using a New DNA Reference Material Format.

PubMed

Pinheiro, Leonardo B; O'Brien, Helen; Druce, Julian; Do, Hongdo; Kay, Pippa; Daniels, Marissa; You, Jingjing; Burke, Daniel; Griffiths, Kate; Emslie, Kerry R

2017-11-07

Use of droplet digital PCR technology (ddPCR) is expanding rapidly in the diversity of applications and number of users around the world. Access to relatively simple and affordable commercial ddPCR technology has attracted wide interest in use of this technology as a molecular diagnostic tool. For ddPCR to effectively transition to a molecular diagnostic setting requires processes for method validation and verification and demonstration of reproducible instrument performance. In this study, we describe the development and characterization of a DNA reference material (NMI NA008 High GC reference material) comprising a challenging methylated GC-rich DNA template under a novel 96-well microplate format. A scalable process using high precision acoustic dispensing technology was validated to produce the DNA reference material with a certified reference value expressed in amount of DNA molecules per well. An interlaboratory study, conducted using blinded NA008 High GC reference material to assess reproducibility among seven independent laboratories demonstrated less than 4.5% reproducibility relative standard deviation. With the exclusion of one laboratory, laboratories had appropriate technical competency, fully functional instrumentation, and suitable reagents to perform accurate ddPCR based DNA quantification measurements at the time of the study. The study results confirmed that NA008 High GC reference material is fit for the purpose of being used for quality control of ddPCR systems, consumables, instrumentation, and workflow.

Education Imperatives for Ohio: K-12 Policy Priorities for the Next Biennium

ERIC Educational Resources Information Center

Thomas B. Fordham Foundation, 2010

2010-01-01

For the past two decades, lawmakers from both parties in Ohio have invested heavily in the public education sector. As a consequence, total K-12 education funding, measured in constant dollars, has grown by over 60 percent since 1997, even as Ohio's K-12 student enrollment has shrunk by more than 24,000 students (1.4 percent) during that same…

Intergovernmental Approaches for Strengthening K-12 Accountability Systems

ERIC Educational Resources Information Center

Armour-Garb, Allison, Ed.

2007-01-01

This volume contains an edited transcript of the Rockefeller Institute's October 29, 2007 symposium (Chicago, IL) entitled "Intergovernmental Approaches to Strengthen K-12 Accountability Systems" as well as a framework paper circulated in preparation for the symposium. The transcript begins with a list of the forty state and federal education…

Language Arts: Exceptional Child Education Curriculum K-12.

ERIC Educational Resources Information Center

Curran, Teresa; And Others

The Exceptional Child Education (ECE) program of Jefferson County Public Schools in Louisville, Kentucky, presents this language arts curriculum for use with K-12 students who have learning problems. The ECE program uses the curriculum and materials of the general education program whenever appropriate, but has access to special instructional…

Connecting K-12 Schools to the Information Superhighway.

ERIC Educational Resources Information Center

McKinsey & Co., Inc., Washington, DC.

This report summarizes an analysis of options for connecting the nation's public K-12 schools to the national information infrastructure (NII)--or information superhighway. It incorporates insights drawn from visits to schools and interviews with educators, policymakers, and technology experts around the country, as well as from a review of the…

K-Ras(G12D)-selective inhibitory peptides generated by random peptide T7 phage display technology

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sakamoto, Kotaro; Kamada, Yusuke; Sameshima, Tomoya

Amino-acid mutations of Gly{sup 12} (e.g. G12D, G12V, G12C) of V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (K-Ras), the most promising drug target in cancer therapy, are major growth drivers in various cancers. Although over 30 years have passed since the discovery of these mutations in most cancer patients, effective mutated K-Ras inhibitors have not been marketed. Here, we report novel and selective inhibitory peptides to K-Ras(G12D). We screened random peptide libraries displayed on T7 phage against purified recombinant K-Ras(G12D), with thorough subtraction of phages bound to wild-type K-Ras, and obtained KRpep-2 (Ac-RRCPLYISYDPVCRR-NH{sub 2}) as a consensus sequence. KRpep-2 showedmore » more than 10-fold binding- and inhibition-selectivity to K-Ras(G12D), both in SPR analysis and GDP/GTP exchange enzyme assay. K{sub D} and IC{sub 50} values were 51 and 8.9 nM, respectively. After subsequent sequence optimization, we successfully generated KRpep-2d (Ac-RRRRCPLYISYDPVCRRRR-NH{sub 2}) that inhibited enzyme activity of K-Ras(G12D) with IC{sub 50} = 1.6 nM and significantly suppressed ERK-phosphorylation, downstream of K-Ras(G12D), along with A427 cancer cell proliferation at 30 μM peptide concentration. To our knowledge, this is the first report of a K-Ras(G12D)-selective inhibitor, contributing to the development and study of K-Ras(G12D)-targeting drugs. - Highlights: • The first K-Ras(G12D)-selective inhibitory peptides were generated. • These peptides showed more than 10-fold binding- and inhibition-selectivity to K-Ras(G12D) in compared to wild type K-Ras. • The peptide KRpep-2d suppressed downstream signal of K-Ras(G12D) and cell proliferations of cancer cell line A427.« less

17 CFR 201.550 - Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A).

Code of Federal Regulations, 2012 CFR

2012-04-01

... to Exchange Act Section 12(k)(1)(A). 201.550 Section 201.550 Commodity and Securities Exchanges... Suspensions § 201.550 Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A). (a) Petition for termination of suspension. Any person adversely affected by a suspension pursuant to Section 12(k)(1)(A) of...

17 CFR 201.550 - Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A).

Code of Federal Regulations, 2013 CFR

2013-04-01

... to Exchange Act Section 12(k)(1)(A). 201.550 Section 201.550 Commodity and Securities Exchanges... Suspensions § 201.550 Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A). (a) Petition for termination of suspension. Any person adversely affected by a suspension pursuant to Section 12(k)(1)(A) of...

17 CFR 201.550 - Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A).

Code of Federal Regulations, 2011 CFR

2011-04-01

... to Exchange Act Section 12(k)(1)(A). 201.550 Section 201.550 Commodity and Securities Exchanges... Suspensions § 201.550 Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A). (a) Petition for termination of suspension. Any person adversely affected by a suspension pursuant to Section 12(k)(1)(A) of...

17 CFR 201.550 - Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A).

Code of Federal Regulations, 2014 CFR

2014-04-01

... to Exchange Act Section 12(k)(1)(A). 201.550 Section 201.550 Commodity and Securities Exchanges... Suspensions § 201.550 Summary suspensions pursuant to Exchange Act Section 12(k)(1)(A). (a) Petition for termination of suspension. Any person adversely affected by a suspension pursuant to Section 12(k)(1)(A) of...

Quantitative Assessment of Commutability for Clinical Viral Load Testing Using a Digital PCR-Based Reference Standard

PubMed Central

Tang, L.; Sun, Y.; Buelow, D.; Gu, Z.; Caliendo, A. M.; Pounds, S.

2016-01-01

Given recent advances in the development of quantitative standards, particularly WHO international standards, efforts to better understand the commutability of reference materials have been made. Existing approaches in evaluating commutability include prediction intervals and correspondence analysis; however, the results obtained from existing approaches may be ambiguous. We have developed a “deviation-from-ideal” (DFI) approach to evaluate commutability of standards and applied it to the assessment of Epstein-Bar virus (EBV) load testing in four quantitative PCR assays, treating digital PCR as a reference assay. We then discuss advantages and limitations of the DFI approach as well as experimental design to best evaluate the commutability of an assay in practice. PMID:27076654

Evaluating the Performance of Online K-12 Schools

ERIC Educational Resources Information Center

Carpenter, Dick; Kafer, Krista; Reeser, Kelly; Shafer, Sheryl

2015-01-01

This article examines K-12 online student and school performance across an entire state (Colorado) in the United States through two comparisons. First, state assessment scores of students in online schools are compared to those in traditional brick and mortar schools. Second, the accountability scores of online schools are compared to those of…

Supporting the K-12 Classroom through University Outreach

ERIC Educational Resources Information Center

Moskal, Barbara; Skokan, Catherine

2011-01-01

This article provides a field-based example of a series of outreach programs that have been designed in response to current recommendations found in the K-12 outreach literature. These programs begin with university mathematics and science faculty members teaching a 10-day summer workshop to elementary and middle school teachers. Following this…

2011 Census of Technology: Missouri Schools K-12

ERIC Educational Resources Information Center

Missouri Department of Elementary and Secondary Education, 2012

2012-01-01

The Census of Technology (COT) is designed to assess Missouri's continuing investment in K-12 education technologies. The COT provides important data for the Department of Elementary and Secondary Education (DESE) to share with state and national decision-makers to help advance public policy and increase public awareness and support for education…

Designing GIS Learning Materials for K-12 Teachers

ERIC Educational Resources Information Center

Hong, Jung Eun

2017-01-01

Although previous studies have proven the usefulness and effectiveness of geographic information system (GIS) use in the K-12 classroom, the rate of teacher adoption remains low. The identified major barrier to its use is a lack of teachers' background and experience. To solve this limitation, many organisations have provided GIS-related teacher…

Incorporating Skills into Social Studies Programs, K-12.

ERIC Educational Resources Information Center

Gregory, George, Ed.

Designed to assist schools in implementing developmental skills in the social studies programs for grades K-12, this guide is divided into seven sections. The first section, a literature review, cites publications on social studies skills. Section 2 gives an interdisciplinary view of shared skills in the New York state curriculum. Three skill…

A Guide to Networking for K-12 Schools.

ERIC Educational Resources Information Center

Northwest Regional Educational Lab., Portland, OR.

The purpose of this guide is to provide basic networking information and planning assistance for technology coordinators and others involved in building networks for K-12 schools. The information in this guide focuses on the first few steps in the networking process. It reviews planning considerations and network design issues facing educators who…

Engineering design skills coverage in K-12 engineering program curriculum materials in the USA

NASA Astrophysics Data System (ADS)

Chabalengula, Vivien M.; Mumba, Frackson

2017-11-01

The current K-12 Science Education framework and Next Generation Science Standards (NGSS) in the United States emphasise the integration of engineering design in science instruction to promote scientific literacy and engineering design skills among students. As such, many engineering education programmes have developed curriculum materials that are being used in K-12 settings. However, little is known about the nature and extent to which engineering design skills outlined in NGSS are addressed in these K-12 engineering education programme curriculum materials. We analysed nine K-12 engineering education programmes for the nature and extent of engineering design skills coverage. Results show that developing possible solutions and actual designing of prototypes were the highly covered engineering design skills; specification of clear goals, criteria, and constraints received medium coverage; defining and identifying an engineering problem; optimising the design solution; and demonstrating how a prototype works, and making iterations to improve designs were lowly covered. These trends were similar across grade levels and across discipline-specific curriculum materials. These results have implications on engineering design-integrated science teaching and learning in K-12 settings.

Clustering Educational Digital Library Usage Data: A Comparison of Latent Class Analysis and K-Means Algorithms

ERIC Educational Resources Information Center

Xu, Beijie; Recker, Mimi; Qi, Xiaojun; Flann, Nicholas; Ye, Lei

2013-01-01

This article examines clustering as an educational data mining method. In particular, two clustering algorithms, the widely used K-means and the model-based Latent Class Analysis, are compared, using usage data from an educational digital library service, the Instructional Architect (IA.usu.edu). Using a multi-faceted approach and multiple data…

Outreach to Space Scientists Interested in K-12 Education

NASA Technical Reports Server (NTRS)

Morrow, Cherilynn A

1998-01-01

This is the final report for work on outreach to space scientists interested in k-12 education. It outlines what was accomplished during the two years of support and one year no-cost extension (October 1995-September 1998).

Online System Adoption and K-12 Academic Outcomes

ERIC Educational Resources Information Center

Kimmons, R.

2015-01-01

This study seeks to understand the relationship between K-12 online system adoption (e.g., Blackboard, Edmodo, WordPress) and school-level academic achievement ratings. Utilizing a novel approach to data collection via website data extraction and indexing of all school websites in a target state in the United States (n?=?732) and merging these…

Florida's Opinion on K-12 Public Education Spending

ERIC Educational Resources Information Center

Forster, Greg

2006-01-01

This scientifically representative poll of 1,200 Floridians finds that public opinion about K-12 public education spending is seriously misinformed. Floridians think public schools need more money, but the main reason is that they are badly mistaken about how much money the public schools actually get. Key findings of the study include: (1) Half…

Defining Social Studies Education in Michigan (K-12).

ERIC Educational Resources Information Center

Michigan State Board of Education, Lansing.

This document begins by providing some introductory guidelines on constructing a K-12 social studies program and conducting a curriculum program review and then goes on to focus on the goals and objectives for social studies education in Michigan. These are divided into three groups: knowledge; democratic values; and skills. For each of these…

Using Cue Cards throughout the K-12 Curriculum

ERIC Educational Resources Information Center

Conderman, Greg; Hedin, Laura R.

2015-01-01

As a flexible instructional tool, cue cards offer support for students with and without disabilities. By providing different amounts of support, they also can be used to differentiate instruction in a variety of subject areas and grade levels. This article describes various strategies for using cue cards and includes examples from K-12 classrooms.

Designer Librarian: Embedded in K12 Online Learning

ERIC Educational Resources Information Center

Boyer, Brenda

2015-01-01

Over the past two decades, shifts in technology have altered the roles of school librarians in a multitude of ways. New rigorous standards, proliferation of devices, and steady growth of online and blended learning for the K12 market now demand librarians engage with learners in online environments. Taking an instructional design approach is the…

Novel taspine derivative 12k inhibits cell growth and induces apoptosis in lung cell carcinoma.

PubMed

Dai, Bingling; Wang, Wenjie; Liu, Rui; Wang, Hongying; Zhang, Yanmin

2015-03-01

Taspine is an active compound in anticancer agent development. 12k was synthesized with taspine as lead compound bearing biphenyl scaffold and showed potent anticancer activity. Here, we investigated the effect of taspine derivative 12k on A549 lung cells. We showed that 12k not only decreased significantly A549 cell viability, A549 cell colony formation but also impaired A549 cell migration. Moreover, 12k treatment blocked cell cycle progression by increasing cell number in S phase to 42.80% for 6 μmol/L vs. 28.86% for control while decreasing cell number in G1 phase. Accordingly, this was associated with an increase protein expression of cyclin E and a decrease protein expression of cyclin D1, cyclin B1 and its associated CDK1 (cdc2). Meanwhile, we found that 12k induced A549 cell apoptosis, which was closely associated with the effect of the Bcl-2 family. Increase of Bad, Bak and Bax expression levels, decrease of Bcl-2 and Mcl-1 expression levels were observed. SiRNA knockdown of c-myc in A549 cells significantly attenuated tumor inhibition effects of 12k. In conclusion, our results demonstrate that 12k has an inhibitory effect on growth of A549 cell by inducing cell cycle arrest and apoptosis. Copyright © 2015 Elsevier Masson SAS. All rights reserved.

Could digital imaging be an alternative for digital colorimeters?

PubMed

Caglar, Alper; Yamanel, Kivanc; Gulsahi, Kamran; Bagis, Bora; Ozcan, Mutlu

2010-12-01

This study evaluated the colour parameters of composite and ceramic shade guides determined using a colorimeter and digital imaging method with illuminants at different colour temperatures. Two different resin composite shade guides, namely Charisma (Heraeus Kulzer) and Premise (Kerr Corporation), and two different ceramic shade guides, Vita Lumin Vacuum (VITA Zahnfabrik) and Noritake (Noritake Co.), were evaluated at three different colour temperatures (2,700 K, 2,700-6,500 K, and 6500 K) of illuminants. Ten shade tabs were selected (A1, A2, A3, A3,5, A4, B1, B2, B3, C2 and C3) from each shade guide. CIE Lab values were obtained using digital imaging and a colorimeter (ShadeEye NCC Dental Chroma Meter, Shofu Inc.). The data were analysed using two-way ANOVA, and Pearson's correlation. While mean L* values of both composite and ceramic shade guides were not affected from the colour temperature, L* values obtained with the colorimeter showed significantly lower values than those of the digital imaging (p < 0.01). At combined 2,700-6500 K colour temperature, the means of a* values obtained from colorimeter and digital imaging did not show significant differences (p > 0.05). For both composite and ceramic shade guides, L* and b* values obtained from colorimeter and digital imaging method presented a high level of correlation. High-level correlations were also acquired for a* values in all shade guides except for the Charisma composite shade guide. Digital imaging method could be an alternative for the colorimeters unless the proper object-camera distance, digital camera settings and suitable illumination conditions could be supplied. However, variations in shade guides, especially for composites, may affect the correlation.

Level up Learning: A National Survey on Teaching with Digital Games

ERIC Educational Resources Information Center

Takeuchi, Lori M.; Vaala, Sarah

2014-01-01

Digital games have the potential to transform K-12 education as we know it. But what has been the real experience among teachers who use games in the classroom? In 2013, the Games and Learning Publishing Council conducted a national survey among nearly 700 K-8 teachers. The report reveals key findings from the survey, and looks at how often and…

Development of an Attitude Scale to Assess K-12 Teachers' Attitudes toward Nanotechnology

ERIC Educational Resources Information Center

Lan, Yu-Ling

2012-01-01

To maximize the contributions of nanotechnology to this society, at least 60 countries have put efforts into this field. In Taiwan, a government-funded K-12 Nanotechnology Programme was established to train K-12 teachers with adequate nanotechnology literacy to foster the next generation of Taiwanese people with sufficient knowledge in…

STEM Integration in K-12 Education: Status, Prospects, and an Agenda for Research

ERIC Educational Resources Information Center

Honey, Margaret; Pearson, Greg; Schweingruber, Heidi

2014-01-01

"STEM Integration in K-12 Education" examines current efforts to connect the STEM disciplines in K-12 education. This report identifies and characterizes existing approaches to integrated STEM education, both in formal and after- and out-of-school settings. The report reviews the evidence for the impact of integrated approaches on…

Project WILD K-12 Curriculum and Activity Guide

ERIC Educational Resources Information Center

Council for Environmental Education, 2011

2011-01-01

The "Project WILD K-12 Curriculum and Activity Guide" focuses on wildlife and habitat. It is organized in topic units and is based on the Project WILD conceptual framework. Because these activities are designed for integration into existing courses of study, instructors may use one or many Project WILD activities or the entire set of activities…

Skyline Gathers K-12 Together Under One Roof.

ERIC Educational Resources Information Center

American School Board Journal, 1968

1968-01-01

Skyline School is a flexible and economical elementary and high school design for 400 pupils. The library, a large resource center serving all ages, and the administration offices are accented by landscaped courts. There are two instructional material centers per grade grouping of K-6 and 7-12. Grades 1-6 surround the kindergarten, which has…

Federal Support for Technology in K-12 Education

ERIC Educational Resources Information Center

Chapman, Gary

2000-01-01

The federal government has, on the whole, has done an excellent job, especially since 1996, in fostering the use of technology in K-12 public schools in the United States. The Department of Education's focus on getting computers and Internet access to low-income schools and communities is the right approach. This paper measures the impact of the…

Engaging K-12 Language Learners in Media Literacy

ERIC Educational Resources Information Center

Egbert, Joy; Neville, Chon

2015-01-01

Calls to integrate media literacy into K-12 language classrooms appear to have gone largely unheeded. However, media literacy skills are seen as crucial for 21st-century learners. This article answers the calls for a focus on media literacy in the language classroom by addressing both why and how systematic attention might be brought to this issue…

Exploring Arizona K-12 Virtual Educator Experiences and Perspectives Developing Collaborative Learning Communities

ERIC Educational Resources Information Center

Cross, Deborah Iyron

2015-01-01

Arizona Online Instruction (AOI) provided an instructional alternative to nearly fifty thousand K-12 students in Arizona during the 2012-2013 school year. Growth in online education underscores the importance of evolving the role of the K-12 virtual teacher as the human agent (Turvey, 2008) demonstrating social learning theory (Bandura, 1977) by…

In Search of the Active Site of PMMO Enzyme: Partnership between a K-12 Teacher, a Graduate K-12 Teaching Fellow, and a Research Mentor

ERIC Educational Resources Information Center

Bearden, Katherine K.; Mainardi, Daniela S.; Culligan, Tanya

2009-01-01

The partnership between a K-12 teacher (Culligan), an NSF GK-12 Teaching Fellow graduate student (Bearden), and a Louisiana Tech faculty member (Mainardi) collaborating in a research and education project is described in this work. The unique grouping of these three researchers allows for maximum dissemination of developed modules. By the end of…

Finished Genome Sequence of the Laboratory Strain Escherichia coli K-12 RV308 (ATCC 31608).

PubMed

Krempl, Peter M; Mairhofer, Juergen; Striedner, Gerald; Thallinger, Gerhard G

2014-11-20

Escherichia coli strain K-12 substrain RV308 is an engineered descendant of the K-12 wild-type strain. Like its ancestor, it is an important organism in biotechnological research and is heavily used for the expression of single-chain variable fragments. Here, we report the complete genome sequence of E. coli K-12 RV308 (ATCC 31608). Copyright © 2014 Krempl et al.

K-Ras(G12D)-selective inhibitory peptides generated by random peptide T7 phage display technology.

PubMed

Sakamoto, Kotaro; Kamada, Yusuke; Sameshima, Tomoya; Yaguchi, Masahiro; Niida, Ayumu; Sasaki, Shigekazu; Miwa, Masanori; Ohkubo, Shoichi; Sakamoto, Jun-Ichi; Kamaura, Masahiro; Cho, Nobuo; Tani, Akiyoshi

2017-03-11

Amino-acid mutations of Gly 12 (e.g. G12D, G12V, G12C) of V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (K-Ras), the most promising drug target in cancer therapy, are major growth drivers in various cancers. Although over 30 years have passed since the discovery of these mutations in most cancer patients, effective mutated K-Ras inhibitors have not been marketed. Here, we report novel and selective inhibitory peptides to K-Ras(G12D). We screened random peptide libraries displayed on T7 phage against purified recombinant K-Ras(G12D), with thorough subtraction of phages bound to wild-type K-Ras, and obtained KRpep-2 (Ac-RRCPLYISYDPVCRR-NH 2 ) as a consensus sequence. KRpep-2 showed more than 10-fold binding- and inhibition-selectivity to K-Ras(G12D), both in SPR analysis and GDP/GTP exchange enzyme assay. K D and IC 50 values were 51 and 8.9 nM, respectively. After subsequent sequence optimization, we successfully generated KRpep-2d (Ac-RRRRCPLYISYDPVCRRRR-NH 2 ) that inhibited enzyme activity of K-Ras(G12D) with IC 50  = 1.6 nM and significantly suppressed ERK-phosphorylation, downstream of K-Ras(G12D), along with A427 cancer cell proliferation at 30 μM peptide concentration. To our knowledge, this is the first report of a K-Ras(G12D)-selective inhibitor, contributing to the development and study of K-Ras(G12D)-targeting drugs. Copyright © 2017 Elsevier Inc. All rights reserved.

The Engaged Microbiologist: Bringing the Microbiological Sciences to the K-12 Community.

PubMed

Westenberg, David J

2016-03-01

Exposing K-12 students to cutting edge science that impacts their daily lives can bring classroom lessons to life. Citizen-science projects are an excellent way to bring high-level science to the classroom and help satisfy one of the cornerstone concepts of the Next Generation Science Standards (NGSS), "engaging in practices that scientists and engineers actually use." This can be a daunting task for teachers who may lack the background or resources to integrate these projects into the classroom. This is where scientific societies such as the American Society for Microbiology (ASM) can play a critical role. ASM encourages its members to engage with the K-12 community by providing networking opportunities and resources for ASM members and K-12 teachers to work together to bring microbiology into the classroom. Journal of Microbiology & Biology Education.

Involving Practicing Scientists in K-12 Science Teacher Professional Development

NASA Astrophysics Data System (ADS)

Bertram, K. B.

2011-12-01

The Science Teacher Education Program (STEP) offered a unique framework for creating professional development courses focused on Arctic research from 2006-2009. Under the STEP framework, science, technology, engineering, and math (STEM) training was delivered by teams of practicing Arctic researchers in partnership with master teachers with 20+ years experience teaching STEM content in K-12 classrooms. Courses based on the framework were offered to educators across Alaska. STEP offered in-person summer-intensive institutes and follow-on audio-conferenced field-test courses during the academic year, supplemented by online scientist mentorship for teachers. During STEP courses, teams of scientists offered in-depth STEM content instruction at the graduate level for teachers of all grade levels. STEP graduate-level training culminated in the translation of information and data learned from Arctic scientists into standard-aligned lessons designed for immediate use in K-12 classrooms. This presentation will focus on research that explored the question: To what degree was scientist involvement beneficial to teacher training and to what degree was STEP scientist involvement beneficial to scientist instructors? Data sources reveal consistently high levels of ongoing (4 year) scientist and teacher participation; high STEM content learning outcomes for teachers; high STEM content learning outcomes for students; high ratings of STEP courses by scientists and teachers; and a discussion of the reasons scientists indicate they benefited from STEP involvement. Analyses of open-ended comments by teachers and scientists support and clarify these findings. A grounded theory approach was used to analyze teacher and scientist qualitative feedback. Comments were coded and patterns analyzed in three databases. The vast majority of teacher open-ended comments indicate that STEP involvement improved K-12 STEM classroom instruction, and the vast majority of scientist open-ended comments

Perspectives on...Special Collections at ARL Libraries and K-12 Outreach: Current Trends

ERIC Educational Resources Information Center

Visser, Michelle

2006-01-01

This article examines the results of a survey sent to Association of Research Libraries (ARL) Special Collections requesting information on outreach to K-12 students. Over half of the respondents work with K-12 and many of those who currently do not are planning to. New pressures and changing philosophies contribute to this trend.

K-12 Teacher Perceptions Regarding the Flipped Classroom Model for Teaching and Learning

ERIC Educational Resources Information Center

Gough, Evan; DeJong, David; Grundmeyer, Trent; Baron, Mark

2017-01-01

A great deal of evidence can be cited from higher education literature on the effectiveness of the flipped classroom; however, very little research was discovered on the flipped classroom at the K-12 level. This study examined K-12 teachers' perceptions regarding the flipped classroom and differences in teachers' perceptions based on grade level…

Common path in-line holography using enhanced joint object reference digital interferometers

PubMed Central

Kelner, Roy; Katz, Barak; Rosen, Joseph

2014-01-01

Joint object reference digital interferometer (JORDI) is a recently developed system capable of recording holograms of various types [Opt. Lett. 38(22), 4719 (2013)24322115]. Presented here is a new enhanced system design that is based on the previous JORDI. While the previous JORDI has been based purely on diffractive optical elements, displayed on spatial light modulators, the present design incorporates an additional refractive objective lens, thus enabling hologram recording with improved resolution and increased system applicability. Experimental results demonstrate successful hologram recording for various types of objects, including transmissive, reflective, three-dimensional, phase and highly scattering objects. The resolution limit of the system is analyzed and experimentally validated. Finally, the suitability of JORDI for microscopic applications is verified as a microscope objective based configuration of the system is demonstrated. PMID:24663838

Effects of paraquat on Escherichia coli: Differences between B and K-12 strains

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kitzler, J.W.; Minakami, H.; Fridovich, I.

1990-02-01

Escherichia coli B and K-12 are equally susceptible to the bacteriostatic effects of aerobic paraquat, but they differed strikingly when the lethality of paraquat was evaluated. E. coli B suffered an apparent loss of viability when briefly exposed to paraquat, whereas E. coli K-12 did not. This difference depended on the ability of the B-strain, but not the K-12 strain, to retain internalized paraquat; the B strain was killed on aerobic tryptic soy-yeast extract plates during the incubation which preceded the counting of colonies. This difference in retention of paraquat between strains was demonstrated by delayed loss of viability, bymore » growth inhibition, and by cyanide-resistant respiration after brief exposure to paraquat, washing, and testing in fresh medium. This difference was also shown by using ({sup 14}C)paraquat. This previously unrecognized difference between E. coli B and K-12 has been the cause of apparently contradictory reports and should lead to some reevaluation of the pertinent literature.« less

Accuracy of vertical height measurements on direct digital panoramic radiographs using posterior mandibular implants and metal balls as reference objects.

PubMed

Vazquez, L; Nizamaldin, Y; Combescure, C; Nedir, R; Bischof, M; Dohan Ehrenfest, D M; Carrel, J-P; Belser, U C

2013-01-01

Conventional panoramic radiography, a widely used radiographic examination tool in implant treatment planning, allows evaluation of the available bone height before inserting posterior mandibular implants. Image distortion and vertical magnification due to projection geometry is well described for rotational panoramic radiographs. To assess the accuracy of vertical height measurements on direct digital panoramic radiographs, implants and metal balls positioned in the posterior mandible were used as radio-opaque reference objects. The reproducibility of the measuring method was assessed by the inter- and intraobserver agreements. Direct digital panoramic radiographs, performed using a Kodak 8000C (Eastman Kodak Company, Rochester, NY), of 17 partially edentulous patients (10 females, 7 males, mean age 65 years) were selected from an X-ray database gathered during routine clinical evaluation of implant sites. Proprietary software and a mouse-driven calliper were used to measure the radiological length of 25 implants and 18 metal reference balls, positioned in mandibular posterior segments. The distortion ratio (DR) was calculated by dividing the radiological implant length by the implant's real length and the radiological ball height by the ball's real height. Mean vertical DR was 0.99 for implants and 0.97 for balls, and was unrelated to mandibular sites, side, age, gender or observer. Inter- and intraobserver agreements were acceptable for both reference objects. Vertical measurements had acceptable accuracy and reproducibility when a software-based calibrated measurement tool was used, confirming that digital panoramic radiography can be reliably utilized to determine the pre-operative implant length in premolar and molar mandibular segments.

Responding to Concerns about Online Radicalization in U.K. Schools through a Radicalization Critical Digital Literacy Approach

ERIC Educational Resources Information Center

McNicol, Sarah

2016-01-01

This article discusses the two main strategies commonly used to safeguard children and young people online; namely, Internet filtering and digital literacy education. In recent U.K. government guidance, both are identified as means to prevent online radicalization in schools. However, despite the inadequacies of filtering, more attention is…

Evaluation of beta-lactose, PVP K12 and PVP K90 as excipients to prepare piroxicam granules using two wet granulation techniques.

PubMed

Albertini, Beatrice; Cavallari, Cristina; Passerini, Nadia; González-Rodríguez, M L; Rodriguez, Lorenzo

2003-11-01

The present investigation aimed at evaluating the use of different excipients, beta-lactose and polyvinylpyrrolidone of two molecular weights (PVP K12 and PVP K90), in the production of improved release piroxicam granules, by wet granulation using both water and steam as granulation liquid. The formulations examined were: piroxicam (Px)/beta-lactose; Px/PVP K12 and Px/PVP K90, each one at a 1:9 weight ratio. The most significant difference between beta-lactose and PVP is that, using the first excipient, both steam and water granules were produced while, when PVP were employed, only steam granules were obtained. Image analysis revealed that beta-lactose steam granules had a larger surface area with respect to water granules, whereas lower values of this parameter were observed in PVP-s granules, confirming the Scanning Electron Microscopy micrographs and the fractal analysis results. As regards the enhancement of the dissolution profiles, the best result was obtained using beta-lactose steam granules followed by PVP K12 ones, even if the reactive dimension values indicated that during the dissolution process PVP K12 granules modified the surface more than beta-lactose granules. As regards PVP K90, this excipient was the one less influencing the granule morphology and the dissolution behaviour. Differential Scanning Calorimetry analysis suggested the partial amorphisation of the drug in the granules containing the three excipients. This result was then confirmed by X-ray powder diffraction analysis. Therefore, beta-lactose and PVP K12 could be proposed as useful excipients to enhance the dissolution rate of Px from granules prepared using the steam granulation technique.

Qubits and quantum Hamiltonian computing performances for operating a digital Boolean 1/2-adder

NASA Astrophysics Data System (ADS)

Dridi, Ghassen; Faizy Namarvar, Omid; Joachim, Christian

2018-04-01

Quantum Boolean (1 + 1) digits 1/2-adders are designed with 3 qubits for the quantum computing (Qubits) and 4 quantum states for the quantum Hamiltonian computing (QHC) approaches. Detailed analytical solutions are provided to analyse the time operation of those different 1/2-adder gates. QHC is more robust to noise than Qubits and requires about the same amount of energy for running its 1/2-adder logical operations. QHC is faster in time than Qubits but its logical output measurement takes longer.

Virtual Schools: The Changing Landscape of K-12 Education in the U.S.

ERIC Educational Resources Information Center

Toppin, Ian N.; Toppin, Sheila M.

2016-01-01

Virtual schools are a growing phenomenon in k-12 education. School systems in almost every state in the United States offer some version of fully online or blended education. It is no longer far-fetched to conclude that if the current trend continues, virtual school enrollments will eclipse those of traditional brick-and-mortar k-12 institutions…

Leadership Analysis in K-12 Case Study: "Divided Loyalties"

ERIC Educational Resources Information Center

Alsubaie, Merfat Ayesh

2016-01-01

This report mainly aims to provide a critical and in-depth analysis of the K-12 Case, "Divided Loyalty" by Holy and Tartar (2004). The case recounts how the manifestation of inadequate leadership skills in a school setting could affect negatively the performance of students.

Information Security Management Practices of K-12 School Districts

ERIC Educational Resources Information Center

Nyachwaya, Samson

2013-01-01

The research problem addressed in this quantitative correlational study was the inadequacy of sound information security management (ISM) practices in K-12 school districts, despite their increasing ownership of information assets. Researchers have linked organizational and sociotechnical factors to the implementation of information security…

Modern & Classical Languages: K-12 Program EValuation 1988-89.

ERIC Educational Resources Information Center

Martinez, Margaret Perea

This evaluation of the modern and classical languages programs, K-12, in the Albuquerque (New Mexico) public school system provides general information on the program's history, philosophy, recognition, curriculum development, teachers, and activities. Specific information is offered on the different program components, namely, the elementary…

Connecting with Teachers and Students through K-12 Outreach Activities

NASA Astrophysics Data System (ADS)

Chapman, Susan; Lindbo, David; Robinson, Clay

2014-05-01

The Soil Science Society of America has invested heavily in a significant outreach effort to reach teachers and students in the primary/secondary grades (K-12 grades in US/Canada) to raise awareness of soil as a critical resource. The SSSA K-12 committee has been charged with increasing interest and awareness of soil science as a scientific pursuit and career choice, and providing resources that integrate more information on soil science into biology, chemistry, physics, and earth science areas taught at multiple grade levels. Activities center around five main areas: assessment and standards, learning modules/lesson plans, website development, and books and materials, and partnership activities. Members (professionals and students) of SSSA are involved through committee participation, local events, materials review, and project development.

Educators in Industry: An Exploratory Study to Determine How Teacher Externships Influence K-12 Classroom Practices

ERIC Educational Resources Information Center

Bowen, Bradley; Shume, Teresa

2018-01-01

This exploratory study investigates the impacts of industry-based externships for K-12 teachers, and reports teachers' perspectives on how these experiences influenced K-12 classroom practices. The program of focus in this research study is the Educators in Industry: K-12 Externship Program. For four weeks in the summer, teacher-participants are…

The minor spliceosomal protein U11/U12-31K is an RNA chaperone crucial for U12 intron splicing and the development of dicot and monocot plants.

PubMed

Kwak, Kyung Jin; Jung, Hyun Ju; Lee, Kwang Ho; Kim, Young Soon; Kim, Won Yong; Ahn, Sung Ju; Kang, Hunseung

2012-01-01

U12 intron-specific spliceosomes contain U11 and U12 small nuclear ribonucleoproteins and mediate the removal of U12 introns from precursor-mRNAs. Among the several proteins unique to the U12-type spliceosomes, an Arabidopsis thaliana AtU11/U12-31K protein has been shown to be indispensible for proper U12 intron splicing and for normal growth and development of Arabidopsis plants. Here, we assessed the functional roles of the rice (Oryza sativa) OsU11/U12-31K protein in U12 intron splicing and development of plants. The U11/U12-31K transcripts were abundantly expressed in the shoot apical meristems (SAMs) of Arabidopsis and rice. Ectopic expression of OsU11/U12-31K in AtU11/U12-31K-defecient Arabidopsis mutant complemented the incorrect U12 intron splicing and abnormal development phenotypes of the Arabidopsis mutant plants. Impaired cell division activity in the SAMs and inflorescence stems observed in the AtU11/U12-31K-deficient mutant was completely recovered to normal by the expression of OsU11/U12-31K. Similar to Arabidopsis AtU11/U12-31K, rice OsU11/U12-31K was determined to harbor RNA chaperone activity. Collectively, the present findings provide evidence for the emerging idea that the U11/U12-31K protein is an indispensible RNA chaperone that functions in U12 intron splicing and is necessary for normal development of monocotyledonous plants as well as dicotyledonous plants.

Tracking clinical use of personal digital assistant reference resources.

PubMed

Pattillo, Robin E; Brewer, Marquette; Smith, Cheryl M

2007-01-01

Mechanisms are needed to evaluate the effectiveness of ever-increasing technological resources for nursing student use. The authors tracked the use of personal digital assistants versus textbook resources by junior-level baccalaureate nursing students throughout 1 semester. The authors discuss the results of that activity and provide a starting point for the evaluation of the use of personal digital assistants by nursing students.

Direct-to-digital holography and holovision

DOEpatents

Thomas, Clarence E.; Baylor, Larry R.; Hanson, Gregory R.; Rasmussen, David A.; Voelkl, Edgar; Castracane, James; Simkulet, Michelle; Clow, Lawrence

2000-01-01

Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made.

Virtual mask digital electron beam lithography

DOEpatents

Baylor, Larry R.; Thomas, Clarence E.; Voelkl, Edgar; Moore, James A.; Simpson, Michael L.; Paulus, Michael J.

1999-01-01

Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made.

A Comparison of Patients Absorption Doses with Bone Deformity Due to the EOS Imaging and Digital Radiology

PubMed Central

Abrisham, Seyed Mohammad J.; Bouzarjomehri, Fathollah; Nafisi-Moghadam, Reza; Sobhan, Mohammad R.; Gadimi, Mahdie; Omidvar, Fereshte

2017-01-01

Background: This study has aimed to measure the patient dose in entire spine radiography by EOS system in comparison with the digital radiography. Methods: EOS stereo-radiography was used for frontal and lateral view spine imaging in 41 patients in a prospective analytical study. A calibrated dose area product (DAP) meter was used for calibration of the DAP in EOS system. The accuracy and precision of the system was confirmed according to the acceptance testing. The same procedure was used for 18 patients referred for lumbar spine digital radiology (overall 36 images). Results: Although radiation fields in the EOS were almost twice of that in digital radiology, and the average peak tube voltage (kVp), current supply to the tube (mA), and the average size and age of the patients referred for EOS imaging were greater than digital radiology, however, the average DAP in EOS was 1/5 of that in digital radiology system. Also, the average dose in the EOS was about 1/20 of that in digital radiology. Conclusion: The patient dose in EOS imaging system was lower in comparison with digital radiology (1/20). PMID:28656161

A Comparison of Patients Absorption Doses with Bone Deformity Due to the EOS Imaging and Digital Radiology.

PubMed

Abrisham, Seyed Mohammad J; Bouzarjomehri, Fathollah; Nafisi-Moghadam, Reza; Sobhan, Mohammad R; Gadimi, Mahdie; Omidvar, Fereshte

2017-05-01

This study has aimed to measure the patient dose in entire spine radiography by EOS system in comparison with the digital radiography. EOS stereo-radiography was used for frontal and lateral view spine imaging in 41 patients in a prospective analytical study. A calibrated dose area product (DAP) meter was used for calibration of the DAP in EOS system. The accuracy and precision of the system was confirmed according to the acceptance testing. The same procedure was used for 18 patients referred for lumbar spine digital radiology (overall 36 images). Although radiation fields in the EOS were almost twice of that in digital radiology, and the average peak tube voltage (kV p ), current supply to the tube (mA), and the average size and age of the patients referred for EOS imaging were greater than digital radiology, however, the average DAP in EOS was 1/5 of that in digital radiology system. Also, the average dose in the EOS was about 1/20 of that in digital radiology. The patient dose in EOS imaging system was lower in comparison with digital radiology (1/20).

Nasa's Operation Icebridge and Remote Sensing Techniques in the K-12 Classroom as a STEM Integration Project

NASA Astrophysics Data System (ADS)

McCarthy, K.

2017-12-01

NASA's Operation IceBridge (OIB), the largest airborne survey of Earth's polar ice uses remote sensing methods to collect data on changing sea and land ice. PolarTREC teacher Kelly McCarthy joined the team during the 2016 Spring Arctic Campaign. This presentation explores ways in which k-12 students were engaged in the work being done by OIB through classroom learning experiences, digital communications, and independent research. Initially, digital communication including chats via NASA's Mission Tools Suite for Education (MTSE) platform was leveraged to engage students in the daily work of OIB. Two lessons were piloted with student groups during the 2016-2017 academic year both for students who actively engaged in communications with the team during the expedition and those who had no prior connections to the field. All of the data collected on OIB missions is stored for public use in a digital portal on the National Snow and Ice Data Center (NSIDC) website. In one lesson, 10th-12th grade students were guided through a tutorial to learn how to access data and begin to develop a story about Greenland's Jakobshavn Glacier using pre-selected data sets, Google's MyMaps app, and independent research methods. In the second lesson, 8th grade students were introduced to remote sensing, first through a discussion on vocabulary using productive talk moves and then via a demonstration using Vernier motion detectors and a graph matching simulation. Students worked in groups to develop procedures to map a hidden surface region (boxed assortment of miscellaneous objects) using a Vernier motion sensor to simulate sonar. Students translated data points collected from the motion sensor into a vertical profile of the simulated surface region. Both lessons allowed students a way to engage in two of the most important components of OIB. The ability to work with real data collected by the OIB team provided a unique context through which students gained skill and overcame challenges in

Overcoming Constraints of Building Successful Partnerships Incorporating STEM Research Into K-12 Classrooms

NASA Astrophysics Data System (ADS)

Radencic, S.; McNeal, K. S.; Pierce, D.; Hare, D.

2011-12-01

The Initiating New Science Partnerships in Rural Education (INSPIRE) program at Mississippi State University (MSU), funded by the NSF Graduate STEM Fellows in K-12 Education (GK12) program, focuses on the advancement of Earth and Space science education in K-12 classrooms. INSPIRE is currently in its second year of partnering ten graduate students from the STEM fields of Geosciences, Engineering and Chemistry at MSU with five teachers from local, rural school districts. The five year project serves to increase inquiry and technology experiences in science and math while enhancing graduate student's communication skills as they create interactive lessons linking their STEM research focus to the state and national standards covered in the classrooms. Each graduate student is responsible for the development of two lessons each month of the school year that are then published on the INSPIRE project webpage, www.gk12.msstate.edu, where they are a free resource for any K-12 classroom teacher seeking innovative activities for their classrooms. Many of the participating teachers and graduate students share activities developed with non-participating teachers, expanding INSPIRE's outreach throughout the local community. Numerous challenges were met during the formation of the program as well as throughout the first year in which the project management team worked together to find solutions ensuring that INSPIRE maintained successful partnerships for all involved. Proposed solutions of the following key components were identified by INSPIRE through the development, implementation, and continuous evaluation (internal and external) of the first year of the program as areas that can pose challenges to the construction of strong relationships between STEM research and K-12 classrooms: initializing the partnerships with the K-12 classrooms and STEM graduate fields at the university; maintaining strong partnerships; providing appropriate training and support; developing sound

An 11-bit and 39 ps resolution time-to-digital converter for ADPLL in digital television

NASA Astrophysics Data System (ADS)

Liu, Wei; (Ruth) Li, Wei; Ren, P.; Lin, C. L.; Zhang, Shengdong; Wang, Yangyuan

2010-04-01

We propose and demonstrate an 11-bit time-to-digital converter (TDC) for all-digital phase-locked loops (ADPLLs) in digital television. The proposed TDC converts the width of the input pulse into digital output with the tap space of the outputs of a free-running ring oscillator (FRO) being the conversion resolution. The FRO is in a structure of coiled cell array and the TDC core is symmetrical in the input structure. This leads to equally spaced taps in the reference clocks and thereby a high TDC conversion linearity. The TDC is fabricated in 0.13 μm CMOS process and the chip area is 0.025 mm2. The measurement results show that the TDC has a conversion resolution of 39 ps at 1.2 V power supply and a 4.5 ns dead time in the 11-bits output case. Both the differential non-linearity (DNL) and integral non-linearity (INL) are below 0.5 LSB. The power consumption of the whole circuit is 4.2 mW.

Comprehension Across the Curriculum: Perspectives and Practices K-12

ERIC Educational Resources Information Center

Ganske, Kathy, Ed.; Fisher, Douglas, Ed.

2009-01-01

Successful students use comprehension skills and strategies throughout the school day. In this timely book, leading scholars present innovative ways to support reading comprehension across content areas and the full K-12 grade range. Chapters provide specific, practical guidance for selecting rewarding texts and promoting engagement and…

AIAA Educator Academy: Enriching STEM Education for K-12 Students

NASA Astrophysics Data System (ADS)

Slagle, E.; Bering, E. A.; Longmier, B. W.; Henriquez, E.; Milnes, T.; Wiedorn, P.; Bacon, L.

2012-12-01

Educator Academy is a K-12 STEM curriculum developed by the STEM K-12 Outreach Committee of the American Institute of Aeronautics and Astronautics (AIAA). Consisting of three independent curriculum modules, K-12 students participate in inquiry-based engineering challenges to improve critical thinking skills and enhance problem solving skills. The Mars Rover Celebration Curriculum Module is designed for students in grades 3-8. Throughout this module, students learn about Mars and the solar system. Working with given design criteria, students work in teams to do basic research about Mars that will determine the operational objectives and structural features of their rover. Then, students participate in the design and construction of a model of a mock-up Mars Rover to carry out a specific science mission on the surface of Mars. At the end of this project, students have the opportunity to participate in a regional capstone event where students share their rover designs and what they have learned. The Electric Cargo Plan Curriculum Module is designed for students in grades 6-12. Throughout this module, students learn about aerodynamics and the four forces of flight. Working individually or in teams, students design and construct an electrically-powered model aircraft to fly a tethered flight of at least one lap without cargo, followed by a second tethered flight of one lap carrying as much cargo as possible. At the end of this project, students have the opportunity to participate in a regional capstone event where students share what they have learned and compete with their different cargo plane designs. The Space Weather Balloon Curriculum Module is designed for students in grades 9-12. Throughout this module, students learn and refine physics concepts as well as experimental research skills. Students participate in project-based learning that is experimental in nature. Students are engaged with the world around them as they collaborate to launch a high altitude

Zero Energy Schools: Designing for the Future: Zero Energy Ready K-12 Schools

DOE Office of Scientific and Technical Information (OSTI.GOV)

Torcellini, Paul A

Designing, building, and operating zero energy ready K-12 schools provides benefits for districts, students, and teachers. Optimizing energy efficiency is important in any building, but it's particularly important in K-12 schools. Many U.S. school districts struggle for funding, and improving a school building's energy efficiency can free up operational funds that may then be available for educational and other purposes.

The Oligo-Acyl Lysyl Antimicrobial Peptide C12K-2β12 Exhibits a Dual Mechanism of Action and Demonstrates Strong In Vivo Efficacy against Helicobacter pylori

PubMed Central

Makobongo, Morris O.; Gancz, Hanan; Carpenter, Beth M.; McDaniel, Dennis P.

2012-01-01

Helicobacter pylori has developed antimicrobial resistance to virtually all current antibiotics. Thus, there is a pressing need to develop new anti-H. pylori therapies. We recently described a novel oligo-acyl-lysyl (OAK) antimicrobial peptidomimetic, C12K-2β12, that shows potent in vitro bactericidal activity against H. pylori. Herein, we define the mechanism of action and evaluate the in vivo efficacy of C12K-2β12 against H. pylori after experimental infection of Mongolian gerbils. We demonstrate using a 1-N-phenylnaphthylamine (fluorescent probe) uptake assay and electron microscopy that C12K-2β12 rapidly permeabilizes the bacterial membrane and creates pores that cause bacterial cell lysis. Furthermore, using nucleic acid binding assays, Western blots, and confocal microscopy, we show that C12K-2β12 can cross the bacterial membranes into the cytoplasm and tightly bind to bacterial DNA, RNA, and proteins, a property that may result in inhibition of enzymatic activities and macromolecule synthesis. To define the in vivo efficacy of C12K-2β12, H. pylori-infected gerbils were orogastrically treated with increasing doses and concentrations of C12K-2β12 1 day or 1 week postinfection. The efficacy of C12K-2β12 was strongest in animals that received the largest number of doses at the highest concentration, indicating dose-dependent activity of the peptide (P < 0.001 by analysis of variance [ANOVA]) regardless of the timing of the treatment with C12K-2β12. Overall, our results demonstrate a dual mode of action of C12K-2β12 against the H. pylori membrane and cytoplasmic components. Moreover, and consistent with the previously reported in vitro efficacy, C12K-2β12 shows significant in vivo efficacy against H. pylori when used as monotherapy. Therefore, OAK peptides may be a valuable resource for therapeutic treatment of H. pylori infection. PMID:22064541

A bronze matryoshka: the discrete intermetalloid cluster [Sn@Cu12@Sn20](12-) in the ternary phases A12Cu12Sn21 (A = Na, K).

PubMed

Stegmaier, Saskia; Fässler, Thomas F

2011-12-14

The synthesis and crystal structure of the first ternary A-Cu-Sn intermetallic phases for the heavier alkali metals A = Na to Cs is reported. The title compounds A(12)Cu(12)Sn(21) show discrete 33-atom intermetalloid Cu-Sn clusters {Sn@Cu(12)@Sn(20)}, which are composed of {Sn(20)} pentagonal dodecahedra surrounding {Cu(12)} icosahedra with single Sn atoms at the center. Na(12)Cu(12)Sn(21) and K(12)Cu(12)Sn(21) were characterized by single-crystal XRD studies, and the successful synthesis of analogous A-Cu-Sn compounds with A = Rb and Cs is deduced from powder XRD data. The isotypic A(12)Cu(12)Sn(21) phases crystallize in the cubic space group Pn ̅3m (No. 224), with the Cu-Sn clusters adopting a face centered cubic arrangement. A formal charge of 12- can be assigned to the {Sn@Cu(12)@Sn(20)} cluster unit, and the interpretation of the title compounds as salt-like intermetallic phases featuring discrete anionic intermetalloid [Sn@Cu(12)@Sn(20)](12-) clusters separated by alkali metal cations is supported by electronic structure calculations. For both Na(12)Cu(12)Sn(21) and K(12)Cu(12)Sn(21), DFT band structure calculations (TB-LMTO-ASA) reveal a band gap. The discrete [Sn@Cu(12)@Sn(20)](12-) cluster is analyzed in consideration of the molecular orbitals obtained from hybrid DFT calculations (Gaussian 09) for the cluster anion. The [Sn@Cu(12)@Sn(20)](12-) cluster MOs can be classified with labels indicating the numbers of radial and angular nodes, in the style of spherical shell models of cluster bonding. © 2011 American Chemical Society

Design, construction and evaluation of a 12.045 GHz, 2.0 kW-cw permanent-magnet focused klystron amplifier

NASA Technical Reports Server (NTRS)

Nishida, J. M.

1975-01-01

An analytical and experimental program to demonstrate the technical feasibility of a lightweight, high-efficiency, 1-2 kW cw, permanent magnet focused klystron operating at 12.0 GHz was described. The design is based on use of a samarium-cobalt permanent magnet for focusing of the electron beam and choice of the most optimum parameters for maximum efficiency. A filter-loaded output circuit is used for the required bandwidth. The design incorporates a collector which is demountable from the tube to facilitate multistage depressed collector experiments, permitting replacement with a NASA-designed axisymmetric, electrostatic collector for linear beam microwave tubes. A further requirement is that the focusing field between the last interaction gap and the collector decay in a prescribed manner referred to as adiabatic expansion.

A Longitudinal Study of the Effectiveness of a K-12 Engagement Program on Graduate Student Learning Outcomes

ERIC Educational Resources Information Center

Weeks, Faith; Gong, Ruiyang; Harbor, Jon

2015-01-01

Programs that connect higher and K-12 education provide benefits to K-12 students, teachers, and higher education. The National Science Foundation (NSF) invested in programs connecting domestic STEM graduate students with K-12 education for over a decade (GK-12), intending that such engagement would help achieve graduate student learning outcomes…

Assessment of tris (1, 3-dichloro-2-propyl) phosphate toxicology in PC12 cells by using digital gene expression profiling.

PubMed

Li, Li; Jiang, Shuai; Li, Kang; Lin, Bencheng; Wang, Ziyu; Zhang, Zhiqing; Fang, Yanjun

2017-09-01

Tris (1,3-dichloro-2-propyl) phosphate (TDCIPP), one of the most universally used organophosphate flame retardants (OPFRs), is an environmental pollutant. However, limited information is available regarding its toxicity and environmental health risk. In the present study, PC12 cells provided a useful model for the evaluation of the toxic effects of TDCIPP. Exposure to 7.5, 15, 30, or 60 μM TDCIPP for 72 h inhibited cell viability, and enhanced cellular apoptosis and oxidative stress. To further explore the underlying mechanisms, digital gene expression (DGE) technology was used to identify early transcriptional changes following TDCIPP exposure. Expression of the transcripts of 161 genes was significantly altered upon treatment with TDCIPP. Functional and pathway analysis of the transcriptional profile demonstrated that genes showing significant TDCIPP-associated changes in expression were involved in the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway, extracellular matrix-receptor interactions, protein digestion and absorption, and microRNAs in cancer. Using quantitative real-time PCR, we validated the differential expression of selected genes. These results showed that the expression profiles of cells exposed to 60 μM TDCIPP were consistent with the DGE data. Furthermore, western blotting showed that treatment with TDCIPP reduced the Bcl-2/Bax ratio and attenuated PI3K/Akt/Myc signaling. Taken together, these data suggest that TDCIPP exposure can reduce cell viability and induce apoptosis in PC12 cells by inhibiting activation of the PI3K/Akt/Myc signaling pathway. These observations provide valuable preliminary information regarding the mechanisms of TDCIPP-induced toxicity in PC12 cells and indicate that further study of the toxicity of other environmental OPFRs is warranted. Copyright © 2017 Elsevier Ltd. All rights reserved.

K-12 and University Partnerships: Bridging the Advocacy Gap

ERIC Educational Resources Information Center

Bryan, Charity; Sims, Sandra

2011-01-01

Research has cited numerous advantages and benefits of K-12 collaborations with the larger university community (Castle, Fox, & Souder, 2006; Crocco, Faithfull, & Schwartz, 2003). Departments of kinesiology across the country are well positioned to establish partnerships with local school systems in order to advocate for quality, daily physical…

Best Practices in Administration of K-12 Dance Programs

ERIC Educational Resources Information Center

Henneman, Suzanne E.

2013-01-01

The role of administering K-12 dance education programs is both exciting and invigorating. Being part of the decision-making process, problem solving with teams of colleagues, establishing routines and initiatives, creating "something from nothing," and watching programs grow is appealing to dance teachers as creative and critical…

Finished Genome Sequence of Escherichia coli K-12 Strain HMS174 (ATCC 47011).

PubMed

Mairhofer, Juergen; Krempl, Peter M; Thallinger, Gerhard G; Striedner, Gerald

2014-11-20

Escherichia coli strain K-12 substrain HMS174 is an engineered descendant of the E. coli K-12 wild-type strain. Like its ancestor, it is an important organism in biotechnological research and is used in fermentation processes for heterologous protein production. Here, we report the complete genome sequence of E. coli HMS174 (ATCC 47011). Copyright © 2014 Mairhofer et al.

Student Perceptions of Digital Story Telling as a Learning-Tool for Educational Leaders

ERIC Educational Resources Information Center

LaFrance, Jason; Blizzard, Jason

2013-01-01

A study regarding students' perceptions of digital storytelling as a learning tool was conducted in the fall of 2012. The population consisted of 12 students participating in an Administrative Theory course as part of their doctoral program in K-12 or higher education administration at a Carnegie Doctoral Research University in Georgia. During the…

Virtual K-12 Learning: New Learning Frontiers for State Education Agencies

ERIC Educational Resources Information Center

Natale, Catherine Fisk; Cook, Janet

2012-01-01

This article explores the role of state education agencies in three states that have embarked on ambitious kindergarten through Grade 12 (K-12) virtual learning initiatives: Alabama, Florida, and Idaho. Subject to a rapidly changing environment influenced by factors beyond the jurisdiction of many state departments of education, the world of…

Virtual mask digital electron beam lithography

DOEpatents

Baylor, L.R.; Thomas, C.E.; Voelkl, E.; Moore, J.A.; Simpson, M.L.; Paulus, M.J.

1999-04-06

Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made. 5 figs.

Trend Analysis of Indiana K-12 Library Services Since the School Library Printed Materials Grant

ERIC Educational Resources Information Center

Plucker, Jonathan; Humphrey, Jack; Simmons, Ada; Ravert, Russell; Kohler, Kristin; Hansen, John

2004-01-01

The Indiana General Assembly recognized the importance of updating school library book collections by appropriating $4 million for K-8 schools during the 1997-1999 school years, $6 million for K-12 schools during the 1999-2001 school years, and $6 million for K-12 schools for the 2001-2003 school years. However, due to state budgetary restraints,…

The K-12 Educational Technology Value Chain: Apps for Kids, Tools for Teachers and Levers for Reform

ERIC Educational Resources Information Center

Pierce, Glenn L.; Cleary, Paul F.

2016-01-01

Historically implementing, maintaining and managing educational technology has been difficult for K-12 educational systems. Consequently, opportunities for significant advances in K-12 education have often gone unrealized. With the maturation of Internet delivered services along with K-12 institutional trends, educational technologies are poised…

K-12 Urban Career Education Infusion Project. Final Evaluation

ERIC Educational Resources Information Center

Denton, William T.; Kleck, Wil

The K-12 Urban Career Education Infusion Project of the Dallas (Texas) Independent School District focused on fourteen schools located in the East Oak Cliff Subdistrict, a predominantly (98%) black community. Conducted in two phases, the project attempted to demonstrate that through infusing career education into the existing curriculum, trained…

Environmental Education: Food - The Coming Crisis (Grades K-12).

ERIC Educational Resources Information Center

New Jersey State Council for Environmental Education, Upper Montclair.

This publication presents classroom activities for teaching about the world food shortage. These activities are organized by objectives, are multidisciplinary and cover the K-12 grade levels. The objectives listed include: (1) Describe some food chains; (2) Appraise the effect of soil conditions, geographic and climatic factors on the food…

Teaching Engineering at the K-12 Level: Two Perspectives

ERIC Educational Resources Information Center

Smith, Kenneth L.; Burghardt, David

2007-01-01

In this article, the authors share their own perspectives regarding engineering education at the K-12 level. Smith believes that there must be a more direct infusion of appropriate mathematics and science with the unique technological content (tools, machines, materials, processes) for an effective engineering education program to exist. He thinks…

Unified Science Approach K-12, Proficiency Levels 1-6.

ERIC Educational Resources Information Center

Oickle, Eileen M., Ed.

Presented are first-revision materials of the K-12 unified science program implemented in the public schools of Anne Arundel County, Maryland. Detailed descriptions are given of the roles of students and teachers, purposes of bibliography, major concepts in unified science, processes of inquiry, scheme and model for scientific literacy, and…

Examining the Digital Divide in K-12 Public Schools: Four-Year Trends for Supporting ICT Literacy in Florida

ERIC Educational Resources Information Center

Hohlfeld, Tina N.; Ritzhaupt, Albert D.; Barron, Ann E.; Kemker, Kate

2008-01-01

While there is evidence that access to computers in schools has increased, there remain questions about whether low socio-economic status (SES) schools provide students with equitable supports for achieving information communication technology (ICT) literacy. This research first presents a theoretical model to examine the digital divide within…

Problems Associated with a Lack of Cohesive Policy in K-12 Pre-College Engineering

ERIC Educational Resources Information Center

Chandler, John; Fontenot, A. Dean; Tate, Derrick

2011-01-01

This article identifies a number of issues associated with current STEM education reform efforts, especially with regard to efforts to integrate engineering education into the K-12 curriculum. Precollege engineering is especially problematic in STEM reform since there is no well-established tradition of engineering in the K-12 curriculum. This…

Measuring the Level of Security in the K-12 IT Environment in Southern California

ERIC Educational Resources Information Center

Brown, Brandon R.

2016-01-01

Kindergartens through twelfth grade institutions (K-12) are susceptible to unauthorized breaches to the security of their networked systems. These systems house sensitive information for students and staff alike. K-12 organizations face a significant risk for loss of this information that can damage reputation and pose liability. Perpetrators have…

Synchronous radio-frequency FM signal generator using direct digital synthesizers

NASA Astrophysics Data System (ADS)

Arablu, Masoud; Kafashi, Sajad; Smith, Stuart T.

2018-04-01

A novel Radio-Frequency Frequency-Modulated (RF-FM) signal generation method is introduced and a prototype circuit developed to evaluate its functionality and performance. The RF-FM signal generator uses a modulated, voltage-controlled time delay to correspondingly modulate the phase of a 10 MHz sinusoidal reference signal. This modulated reference signal is, in turn, used to clock a Direct Digital Synthesizer (DDS) circuit resulting in an FM signal at its output. The modulating signal that is input to the voltage-controlled time delay circuit is generated by another DDS that is synchronously clocked by the same 10 MHz sine wave signal before modulation. As a consequence, all of the digital components are timed from a single sine wave oscillator that forms the basis of all timing. The resultant output signal comprises a center, or carrier, frequency plus a series of phase-synchronized sidebands having exact integer harmonic frequency separation. In this study, carrier frequencies ranging from 10 MHz to 70 MHz are generated with modulation frequencies ranging from 10 kHz to 300 kHz. The captured spectra show that the FM signal characteristics, amplitude and phase, of the sidebands and the modulation depth are consistent with the Jacobi-Anger expansion for modulated harmonic signals.

The Impact of an Intensive Experience on Prospective Teachers' Perception of the Uses of Digital, Interactive Text among K-12 Students

ERIC Educational Resources Information Center

Stonier, Francis W.

2012-01-01

The purpose of this study was to measure pre-service teacher perception, awareness, and potential use of digital literacies, media, and digital interactive text in their future classrooms. The study grew from the theoretical rationales of new literacies, technological pedagogical content knowledge, and constructivism. New literacies are…

Monitoring Digital Closed-Loop Feedback Systems

NASA Technical Reports Server (NTRS)

Katz, Richard; Kleyner, Igor

2011-01-01

A technique of monitoring digital closed-loop feedback systems has been conceived. The basic idea is to obtain information on the performances of closed-loop feedback circuits in such systems to aid in the determination of the functionality and integrity of the circuits and of performance margins. The need for this technique arises as follows: Some modern digital systems include feedback circuits that enable other circuits to perform with precision and are tolerant of changes in environment and the device s parameters. For example, in a precision timing circuit, it is desirable to make the circuit insensitive to variability as a result of the manufacture of circuit components and to the effects of temperature, voltage, radiation, and aging. However, such a design can also result in masking the indications of damaged and/or deteriorating components. The present technique incorporates test circuitry and associated engineering-telemetry circuitry into an embedded system to monitor the closed-loop feedback circuits, using spare gates that are often available in field programmable gate arrays (FPGAs). This technique enables a test engineer to determine the amount of performance margin in the system, detect out of family circuit performance, and determine one or more trend(s) in the performance of the system. In one system to which the technique has been applied, an ultra-stable oscillator is used as a reference for internal adjustment of 12 time-to-digital converters (TDCs). The feedback circuit produces a pulse-width-modulated signal that is fed as a control input into an amplifier, which controls the circuit s operating voltage. If the circuit s gates are determined to be operating too slowly or rapidly when their timing is compared with that of the reference signal, then the pulse width increases or decreases, respectively, thereby commanding the amplifier to increase or reduce, respectively, its output level, and "adjust" the speed of the circuits. The nominal

Technological Collaborations: K-12 and Higher Education. Fastback 438.

ERIC Educational Resources Information Center

Ferguson, Kay McPherson; Kopp, O. W.

This brief report examines various ways in which K-12 schools and institutions of higher education can collaborate to effect critical changes in teaching and learning through the use of computers. The first section briefly reviews the history of computer use in education, noting such critical needs as teacher training, and reviews the…

Teachers' Curriculum Guide to the Hayward Shoreline, K-12.

ERIC Educational Resources Information Center

Bachle, Leo; And Others

This teaching guide gives environmental education ideas for grades K-12. The field trips and activities all relate to the Hayward shoreline of the San Francisco, California, Bay. Included in the guide are 44 science activities, 15 social science activities, and 18 humanities activities. Each activity description gives the experience level, site…

Tablets in K-12 Education: Integrated Experiences and Implications

ERIC Educational Resources Information Center

An, Heejung, Ed.; Alon, Sandra, Ed.; Fuentes, David, Ed.

2015-01-01

The inclusion of new and emerging technologies in the education sector has been a topic of interest to researchers, educators, and software developers alike in recent years. Utilizing the proper tools in a classroom setting is a critical factor in student success. "Tablets in K-12 Education: Integrated Experiences and Implications"…

Project WILD Aquatic K-12 Curriculum and Activity Guide

ERIC Educational Resources Information Center

Council for Environmental Education, 2011

2011-01-01

The "Project WILD Aquatic K-12 Curriculum and Activity Guide" emphasizes aquatic wildlife and aquatic ecosystems. It is organized in topic units and is based on the Project WILD conceptual framework. Because these activities are designed for integration into existing courses of study, instructors may use one or many Project WILD Aquatic activities…

Unifying K-12 Learning Processes: Integrating Curricula through Learning

ERIC Educational Resources Information Center

Bosse, Michael J.; Fogarty, Elizabeth A.

2011-01-01

This study was designed to examine whether a set of cross-curricular learning processes could be found in the respective K-12 US national standards for math, language arts, foreign language, science, social studies, fine arts, and technology. Using a qualitative research methodology, the standards from the national associations for these content…

Under the Scope: Bringing Zooplankton Research into the K-12 Classroom

NASA Astrophysics Data System (ADS)

Cohen, J.; Petrone, C.; Wickline, A.

2016-02-01

Despite their small size, zooplankton are dynamic and engaging animals when viewed by researchers, teachers, and students alike. Recognizing this, we are working with K-12 teachers to develop web-based resources for using zooplankton in the classroom. This outreach effort is part of a Delaware Sea Grant-funded research project studying seasonal dynamics of zooplankton in Delaware Bay. The research team, in collaboration with a marine education specialist, initially created a website (www.underthescope.udel.edu) containing: background information on zooplankton and the research project, a magnification tool, an identification tool, and education modules that facilitate directed use of the website content and tools. Local teachers (elementary through high school) were then hosted for a workshop to engage in zooplankton sampling using methods employed in the research project, including zooplankton tows and semi-autonomous identification using a ZooScan imaging system. Teachers then explored the website, evaluating its design, content, and usability for their particular grade level. Specific suggestions from the evaluation were incorporated into the website, with additional implementation planned over the next year. This teacher- researcher partnership was successful in developing the digital resource itself, in building excitement and capacity among a cohort of teachers, and in establishing relationships among teachers and researchers to facilitate adding new dimensions to the collaboration. The latter will include zooplankton sampling by school groups, researcher optical scanning of samples with ZooScan, and subsequent student analysis and reporting on their data.

K-12 Online Learning and Students with Disabilities: Perspectives from State Special Education Directors

ERIC Educational Resources Information Center

Burdette, Paula J.; Greer, Diana L.; Woods, Kari L.

2013-01-01

K-12 special education policies and practices that ensure students with disabilities receive a free, appropriate public education in the least restrictive environment are coming under pressure from the rapid expansion of online learning. Forty-six state and non-state jurisdiction special education directors responded to a brief survey about K-12…

Radiopacity of endodontic materials on film and a digital sensor.

PubMed

Rasimick, Brian J; Shah, Rinal P; Musikant, Barry Lee; Deutsch, Allan S

2007-09-01

The purpose of this study was to compare the radiographic appearance of 12 endodontic materials as visualized on either Kodak Ultra-speed D speed film (Eastman Kodak Company, Rochester, NY) or a Gendex eHD digital sensor (Gendex Dental Systems, Milan, Italy). Ten discs of each material were radiographed alongside an aluminum alloy 1100 (Alcoa, Pittsburgh, PA) stepwedge that was used for reference. For every radiograph, the average grayscale value of the material was converted into absorbance notation and compared with that of the reference stepwedge in order to determine the equivalent radiopacity in terms of millimeters of Al 1100 per millimeter of material. Two-way repeated-measures analysis of variance testing detected significant differences with respect to imaging system, material, and the interaction of the two factors (p < 0.001). The difference in a material's radiopacity as measured on the digital sensor compared with film was greater than 10% for 4 of the 12 materials and over 40% for InnoEndo (Heraus Kulzer, Armonk, NY). It was speculated that barium fillers cause this effect.

Loss of protein phosphatase 6 in mouse keratinocytes enhances K-rasG12D -driven tumor promotion.

PubMed

Kurosawa, Koreyuki; Inoue, Yui; Kakugawa, Yoichiro; Yamashita, Yoji; Kanazawa, Kosuke; Kishimoto, Kazuhiro; Nomura, Miyuki; Momoi, Yuki; Sato, Ikuro; Chiba, Natsuko; Suzuki, Mai; Ogoh, Honami; Yamada, Hidekazu; Miura, Koh; Watanabe, Toshio; Tanuma, Nobuhiro; Tachi, Masahiro; Shima, Hiroshi

2018-05-14

Here, we address the function of protein phosphatase 6 (PP6) loss on K-ras-initiated tumorigenesis in keratinocytes. To do so, we developed tamoxifen-inducible double mutant (K-ras G12D -expressing and Ppp6c-deficient) mice in which K-ras G12D expression is driven by the cytokeratin 14 (K14) promoter. Doubly-mutant mice showed early onset tumor formation in lip, nipples, external genitalia, anus and palms, and had to be sacrificed by three weeks after induction by tamoxifen, while comparably-treated K-ras G12D -expressing mice did not. HE-staining of lip tumors before euthanasia revealed that all were papillomas, some containing focal squamous cell carcinoma. Immunohistochemical analysis of lip of doubly-mutant versus K-ras G12D mice revealed that cell proliferation and cell size increased approximately two-fold relative to K-ras G12D -expressing mutants, and epidermal thickness of lip tissue greatly increased relative to that seen in K-ras G12D only mice. Moreover, AKT phosphorylation increased in K-ras G12D -expressing/Ppp6c-deficient cells, as did phosphorylation of the downstream effectors 4EBP1, S6, and GSK3, suggesting that protein synthesis and survival signals are enhanced in lip tissues of doubly-mutant mice. Finally, increased numbers of K14-positive cells were present in the suprabasal layer of doubly-mutant mice, indicating abnormal keratinocyte differentiation, and γH2AX-positive cells accumulated, indicating perturbed DNA repair. Taken together, Ppp6c deficiency enhances K-ras G12D -dependent tumor promotion. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

Disorder effects in Mn(12)-acetate at 83 K.

PubMed

Cornia, Andrea; Fabretti, Antonio Costantino; Sessoli, Roberta; Sorace, Lorenzo; Gatteschi, Dante; Barra, Anne-Laure; Daiguebonne, Carole; Roisnel, Thierry

2002-07-01

The structure of hexadeca-mu-acetato-tetraaquadodeca-mu(3)-oxo-dodecamanganese bis(acetic acid) tetrahydrate, [Mn(12)O(12)(CH(3)COO)(16)(H(2)O)(4)] x 2CH(3)COOH x 4H(2)O, known as Mn(12)-acetate, has been determined at 83 (2) K by X-ray diffraction methods. The fourfold (S(4)) molecular symmetry is disrupted by a strong hydrogen-bonding interaction with the disordered acetic acid molecule of solvation, which displaces one of the acetate ligands in the cluster. Up to six Mn(12) isomers are potentially present in the crystal lattice, which differ in the number and arrangement of hydrogen-bonded acetic acid molecules. These results considerably improve the structural information available on this molecular nanomagnet, which was first synthesized and characterized by Lis [Acta Cryst. (1980), B36, 2042-2046].

Optical/digital identification/verification system based on digital watermarking technology

NASA Astrophysics Data System (ADS)

Herrigel, Alexander; Voloshynovskiy, Sviatoslav V.; Hrytskiv, Zenon D.

2000-06-01

This paper presents a new approach for the secure integrity verification of driver licenses, passports or other analogue identification documents. The system embeds (detects) the reference number of the identification document with the DCT watermark technology in (from) the owner photo of the identification document holder. During verification the reference number is extracted and compared with the reference number printed in the identification document. The approach combines optical and digital image processing techniques. The detection system must be able to scan an analogue driver license or passport, convert the image of this document into a digital representation and then apply the watermark verification algorithm to check the payload of the embedded watermark. If the payload of the watermark is identical with the printed visual reference number of the issuer, the verification was successful and the passport or driver license has not been modified. This approach constitutes a new class of application for the watermark technology, which was originally targeted for the copyright protection of digital multimedia data. The presented approach substantially increases the security of the analogue identification documents applied in many European countries.

CAVIAR: a 45k neuron, 5M synapse, 12G connects/s AER hardware sensory-processing- learning-actuating system for high-speed visual object recognition and tracking.

PubMed

Serrano-Gotarredona, Rafael; Oster, Matthias; Lichtsteiner, Patrick; Linares-Barranco, Alejandro; Paz-Vicente, Rafael; Gomez-Rodriguez, Francisco; Camunas-Mesa, Luis; Berner, Raphael; Rivas-Perez, Manuel; Delbruck, Tobi; Liu, Shih-Chii; Douglas, Rodney; Hafliger, Philipp; Jimenez-Moreno, Gabriel; Civit Ballcels, Anton; Serrano-Gotarredona, Teresa; Acosta-Jimenez, Antonio J; Linares-Barranco, Bernabé

2009-09-01

This paper describes CAVIAR, a massively parallel hardware implementation of a spike-based sensing-processing-learning-actuating system inspired by the physiology of the nervous system. CAVIAR uses the asychronous address-event representation (AER) communication framework and was developed in the context of a European Union funded project. It has four custom mixed-signal AER chips, five custom digital AER interface components, 45k neurons (spiking cells), up to 5M synapses, performs 12G synaptic operations per second, and achieves millisecond object recognition and tracking latencies.

An Investigation into Digital Media: Characteristics of Learning Objects Which K-12 Teachers Determine Meet Their Instructional Needs

ERIC Educational Resources Information Center

Guthrie, Patricia Ann

2010-01-01

In recent years, learning objects have emerged as an instructional tool for teachers. Digital libraries and collections provide teachers with free or fee-base access to a variety of learning objects from photos and famous speeches to Flash animations and interactive Java Applets. Learning objects offer opportunities for students to interact with…

K-12 Phenology Lessons for the Phenocam Project

NASA Astrophysics Data System (ADS)

Bennett, K. F.

2013-12-01

Phenology is defined as periodic [or annual] life cycles of plants and animals driven by seasonal environmental changes. Climate change impinges a strong effect on phenology, potentially altering the structure and functioning of ecosystems. In the fall of 2011, the Ashburnham-Westminster Regional School District became the first of five schools to join Harvard University's Phenocam Network with the installation of a webcam to monitor phenology (or 'phenocam') at Overlook Middle School in Ashburnham, Massachusetts. Our school district is now part of a network of near-surface remote sensing phenocams that capture and send images of forest, shrub, and grassland vegetation cover at more than 130 diverse sites in North America. Our phenocam provides a digital image every half hour of the mixed forest canopy north from the school, enabling the detection of changes in canopy development, quantified as canopy 'greenness'. As a part of the Phenocam project, students at the K-12 level have expanded the scope of phenological monitoring protocol that is part of the Harvard Forest Schoolyard Ecology Program, Buds, Leaves, and Global Warming. In this protocol, students work with ecologists at Harvard Forest to monitor buds and leaves on schoolyard trees to determine the length of the growing season, giving them the opportunity to be a part of real and important research concerning the critical environmental issue of climate change. Students involved in the Buds, Leaves, and Global Warming study have the opportunity to compare their ground data on budburst, color change, and leaf drop to the phenocam images, as well as to similar forested sites in locations throughout the United States. Lessons have been developed for comparing student data to phenocam images, canopy greenness time series graphs extracted from the images, and satellite data. Lessons addressing map scale and the Urban Heat Island effect will also be available for teachers. This project will greatly enhance the

Interactive Teaching as a Recruitment and Training Tool for K-12 Science Teachers

NASA Astrophysics Data System (ADS)

Rosenberg, J. L.

2004-12-01

The Science, Technology, Engineering, and Mathematics Teacher Preparation (STEMTP) program at the University of Colorado has been designed to recruit and train prospective K-12 science teachers while improving student learning through interactive teaching. The program has four key goals: (1) recruit undergraduate students into K-12 science education, (2) provide these prospective teachers with hands-on experience in an interactive teaching pedagogy, (3) create an intergrated program designed to support (educationally, socially, and financially) and engage these prospective science teachers up until they obtain liscensure and/or their masters degree in education, and (4) improve student learning in large introductory science classes. Currently there are 31 students involved in the program and a total of 72 students have been involved in the year and a half it has been in existence. I will discuss the design of the STEMTP program, the success in recruiting K-12 science teachers, and the affect on student learning in a large lecture class of implementing interactive learning pedagogies by involving these prospective K-12 science teachers. J. L. Rosenberg would like to acknowledge the NSF Astronomy and Astrophysics Fellowship for support for this work. The course transformation project is also supported by grants from the National Science Foundation.

Genetics Home Reference: lacrimo-auriculo-dento-digital syndrome

MedlinePlus

... Information Center (1 link) Lacrimo-auriculo-dento-digital syndrome Additional NIH Resources (2 links) National Eye Institute: Facts About Dry Eye National Institute of Dental and Craniofacial Research: ...

Physical Education Teacher Educator's Perceptions toward and Understanding of K-12 Online Physical Education

ERIC Educational Resources Information Center

Daum, David N.; Woods, Amelia M.

2015-01-01

K-12 online physical education (OLPE) is as an educational opportunity in at least 30 states in the US (NASPE, 2006; 2010; 2012). The purpose of this study was to examine physical education teacher educators' perceptions toward and understanding of K-12 OLPE. Bandura's Social Cognitive Theory (1986) served as the theoretical framework for this…

Recognizing Warning Signs of K-12 Christian School Distress That Lead to School Closure

ERIC Educational Resources Information Center

Fellers, Ron

2013-01-01

The objective of this research was to identify statistically significant warning signs of K12 Christian school distress that can lead to school closure in the areas of leadership, homogeneity of vision and culture, finances, and competition, as described by Fitzpatrick (2002) and Nichols (2006). Twenty-four strong, declining, and closed K-12…

Micropower CMOS Integrated Low-Noise Amplification, Filtering, and Digitization of Multimodal Neuropotentials

PubMed Central

Mollazadeh, Mohsen; Murari, Kartikeya; Cauwenberghs, Gert; Thakor, Nitish

2009-01-01

Electrical activity in the brain spans a wide range of spatial and temporal scales, requiring simultaneous recording of multiple modalities of neurophysiological signals in order to capture various aspects of brain state dynamics. Here, we present a 16-channel neural interface integrated circuit fabricated in a 0.5 μm 3M2P CMOS process for selective digital acquisition of biopotentials across the spectrum of neural signal modalities in the brain, ranging from single spike action potentials to local field potentials (LFP), electrocorticograms (ECoG), and electroencephalograms (EEG). Each channel is composed of a tunable bandwidth, fixed gain front-end amplifier and a programmable gain/resolution continuous-time incremental ΔΣ analog-to-digital converter (ADC). A two-stage topology for the front-end voltage amplifier with capacitive feedback offers independent tuning of the amplifier bandpass frequency corners, and attains a noise efficiency factor (NEF) of 2.9 at 8.2 kHz bandwidth for spike recording, and a NEF of 3.2 at 140 Hz bandwidth for EEG recording. The amplifier has a measured midband gain of 39.6 dB, frequency response from 0.2 Hz to 8.2 kHz, and an input-referred noise of 1.94 μVrms while drawing 12.2 μA of current from a 3.3 V supply. The lower and higher cutoff frequencies of the bandpass filter are adjustable from 0.2 to 94 Hz and 140 Hz to 8.2 kHz, respectively. At 10-bit resolution, the ADC has an SNDR of 56 dB while consuming 76 μW power. Time-modulation feedback in the ADC offers programmable digital gain (1–4096) for auto-ranging, further improving the dynamic range and linearity of the ADC. Experimental recordings with the system show spike signals in rat somatosensory cortex as well as alpha EEG activity in a human subject. PMID:20046962

Health Education Guide: A Design for Teaching K-12.

ERIC Educational Resources Information Center

Barrett, Morris

This teaching guide to health education includes instruction units for grades K-12. Section 1 discusses the need for health education and includes a scope and sequence chart for each of the instruction units. Section 2 consists of instruction units in the areas of physical development, social and emotional development, chemicals and addiction, and…

GOP Candidates Eye Scaling Back Federal K-12 Role

ERIC Educational Resources Information Center

Klein, Alyson

2012-01-01

Though education has played second fiddle so far to other domestic issues in the race for the Republican presidential nomination, the narrowing field includes GOP candidates with compatible views on scaling back the federal role in K-12, but big contrasts in policy specifics and experience. President Barack Obama, meanwhile, is expected to put a…

First Digit Law and Its Application to Digital Forensics

NASA Astrophysics Data System (ADS)

Shi, Yun Q.

Digital data forensics, which gathers evidence of data composition, origin, and history, is crucial in our digital world. Although this new research field is still in its infancy stage, it has started to attract increasing attention from the multimedia-security research community. This lecture addresses the first digit law and its applications to digital forensics. First, the Benford and generalized Benford laws, referred to as first digit law, are introduced. Then, the application of first digit law to detection of JPEG compression history for a given BMP image and detection of double JPEG compressions are presented. Finally, applying first digit law to detection of double MPEG video compressions is discussed. It is expected that the first digit law may play an active role in other task of digital forensics. The lesson learned is that statistical models play an important role in digital forensics and for a specific forensic task different models may provide different performance.

Achieving Digital Literacy through Game Development: An Authentic Learning Experience

ERIC Educational Resources Information Center

Frydenberg, Mark

2015-01-01

Purpose: This paper aims to argue that the process of making an original game develops digital literacy skills and provides an authentic learning experience as students create, publish and deploy interactive games. Teaching students to create computer games has become common in both K-12 and tertiary education to introducing programming concepts,…

The University Scientist's Role in Promoting Collaborative K-12 Professional Development

NASA Astrophysics Data System (ADS)

Schuster, D.; Brown, L. L.; Carlsen, W. S.

2004-12-01

Comprehensive K-12 science teacher professional development is dependent upon the successful interaction between the university and K-12 communities (National Research Council, 2001), which can be realized through partnerships between university scientists and K-12 science teachers. This paper will identify some best practices of university scientists in the professional development of science teachers, first by citing the professional development and science education literature (Loucks-Horsley, Hewson, Love, & Stiles, 1998; National Research Council, 1996a, 1996b), and then by highlighting how these best practices were actualized in summer workshops for science educators offered at Penn State. Each summer the Pennsylvania Space Grant Consortium supports seven one-week courses for secondary science teachers taught by university scientists from disciplines representative of NASA's research interests. Approximately 100 teachers enroll in these two-credit, graduate-level workshops from a variety of locations and contexts throughout the United States. These summer courses share a number of important features (duration, general format, teacher recruitment and admission, location, number of participants, etc.), making them a unique dataset for comparative research on science teacher professional development. By recognizing the role of university scientists relating to both practice and standards of professional development, we identify areas in which teachers could be empowered to lead and, alternatively, where scientists and administrators should improve and continue to direct-- both supporting a culture of collaboration that builds K-12 science teacher capacity (Fullan, 2001, 2003; Hawley & Valli, 1999). In our observations and analysis of the evaluations, three best practices, as defined by the literature, appeared to distinguish the exceptional workshops: First, teachers give high marks and make affirmative comments about workshops with clearly presented curricular

Course Goals in Mathematics, Grades K-12. Critique Draft.

ERIC Educational Resources Information Center

Multnomah County Intermediate Education District, Portland, OR.

This document is one part of a critique series that deals with the development and evaluation of course goals in six subject matter areas for grades K-12. The series provides an initial pool of course-level goals that are expected to be of considerable value in assisting educators with goal definition related to curriculum planning and…

K-12 Marketplace Sees Major Flow of Venture Capital

ERIC Educational Resources Information Center

Ash, Katie

2012-01-01

The flow of venture capital into the K-12 education market has exploded over the past year, reaching its highest transaction values in a decade in 2011, industry observers say. They attribute that rise to such factors as a heightened interest in educational technology; the decreasing cost of electronic devices such as tablet computers, laptops,…

Enhancing K-12 School Emergency Management through Community Partnerships

ERIC Educational Resources Information Center

Jones, Jay Richard

2018-01-01

The ideal school is a safe school. In recent years, the ability of K-12 school districts to mitigate, prepare, protect, respond, and recover from emergencies has gained national attention as a wide variety of manmade and non-manmade disasters have impacted school systems in the United States. An increased emphasis has been placed on how schools…

Addressing Excellence Gaps in K-12 Education. Position Statement

ERIC Educational Resources Information Center

National Association for Gifted Children, 2015

2015-01-01

Since the passage of the No Child Left Behind Act in 2001, a major objective of federal and state education policy has been to narrow K-12 achievement gaps. This position statement notes that the available data suggest that the singular focus on the most struggling learners has resulted in meaningful progress in closing minimum-competency…

Released products of pathogenic bacteria stimulate biofilm formation by Escherichia coli K-12 strains.

PubMed

Vacheva, Anna; Ivanova, Radka; Paunova-Krasteva, Tsvetelina; Stoitsova, Stoyanka

2012-06-01

It has recently been shown that pathogens with a limited capacity for sessile growth (like some Escherichia coli O157 strains) can benefit from the presence of other bacteria and form mixed biofilms with companion strains. This study addresses the question whether pathogens may influence attached growth of E. coli non-pathogenic strains via secreted factors. We compared the biofilm-modulating effects of sterile stationary-phase culture media of a biofilm non-producing strain of E. coli O157:H, a laboratory biofilm-producing E. coli K-12 strain and a biofilm-forming strain of the pathogen Yersina enterocolitica O:3. Sessile growth was monitored as biomass (crystal violet assay), exopolysaccharide (ELLA) and morphology (scanning electron and confocal laser microscopy). With two of the E. coli K-12 strains stimulation of biofilm formation by all supernatants was achieved, but only the pathogens' secreted products induced biomass increase in some 'biofilm-deficient' K-12 strains. Lectin-peroxidase labeling indicated changes in colanic acid and poly-N-acetylglucosamine amounts in extracellular matrices. The contribution of indole, protein and polysaccharide to the biofilm-modulating activities of the supernatants was compared. Indole, in concentrations equal to those established in the supernatants, suppressed sessile growth in one K-12 strain. Proteinase K significantly reduced the stimulatory effects of all supernatants, indicating a prominent role of protein/peptide factor(s) in biofilm promotion. The amount of released polysaccharides (rPS) in the supernatants was quantitated then comparable quantities of isolated rPS were applied during biofilm growth. The three rPS had notable strain-specific effects with regard to both the strain-source of the rPS and the E. coli K-12 target strain.

Characteristics of Innovation in K12 International Schools in Asia

ERIC Educational Resources Information Center

Hale, Jessica A.

2017-01-01

This qualitative phenomenological study explored identifying characteristics and necessary components of educational innovation in K12 international schools in Asia. Two research questions guided the exploration of observed characteristics of innovation and global leader's perceptions of components of innovation. The findings suggested observed…

Space Science Field Workshops for K-12 Teacher-Scientist Teams

NASA Technical Reports Server (NTRS)

Thompson, P. B.; Kiefer, W. S.; Treiman, A. H.; Irving, A. J.; Johnson, K. M.

2002-01-01

In collaboration with NASA Space Grant Consortia and other partners, we developed workshops for K-12 teachers that involve intensive, direct interaction with scientists. Field trips allow informal and spontaneous interaction, encouraging active participation. Additional information is contained in the original extended abstract.

Accuracy of a Digital Weight Scale Relative to the Nintendo Wii in Measuring Limb Load Asymmetry

PubMed Central

Kumar, NS Senthil; Omar, Baharudin; Joseph, Leonard H; Hamdan, Nor; Htwe, Ohnmar; Hamidun, Nursalbiyah

2014-01-01

[Purpose] The aim of the present study was to investigate the accuracy of a digital weight scale relative to the Wii in limb loading measurement during static standing. [Methods] This was a cross-sectional study conducted at a public university teaching hospital. The sample consisted of 24 participants (12 with osteoarthritis and 12 healthy) recruited through convenient sampling. Limb loading measurements were obtained using a digital weight scale and the Nintendo Wii in static standing with three trials under an eyes-open condition. The limb load asymmetry was computed as the symmetry index. [Results] The accuracy of measurement with the digital weight scale relative to the Nintendo Wii was analyzed using the receiver operating characteristic (ROC) curve and Kolmogorov-Smirnov test (K-S test). The area under the ROC curve was found to be 0.67. Logistic regression confirmed the validity of digital weight scale relative to the Nintendo Wii. The D statistics value from the K-S test was found to be 0.16, which confirmed that there was no significant difference in measurement between the equipment. [Conclusion] The digital weight scale is an accurate tool for measuring limb load asymmetry. The low price, easy availability, and maneuverability make it a good potential tool in clinical settings for measuring limb load asymmetry. PMID:25202181

Accuracy of a digital weight scale relative to the nintendo wii in measuring limb load asymmetry.

PubMed

Kumar, Ns Senthil; Omar, Baharudin; Joseph, Leonard H; Hamdan, Nor; Htwe, Ohnmar; Hamidun, Nursalbiyah

2014-08-01

[Purpose] The aim of the present study was to investigate the accuracy of a digital weight scale relative to the Wii in limb loading measurement during static standing. [Methods] This was a cross-sectional study conducted at a public university teaching hospital. The sample consisted of 24 participants (12 with osteoarthritis and 12 healthy) recruited through convenient sampling. Limb loading measurements were obtained using a digital weight scale and the Nintendo Wii in static standing with three trials under an eyes-open condition. The limb load asymmetry was computed as the symmetry index. [Results] The accuracy of measurement with the digital weight scale relative to the Nintendo Wii was analyzed using the receiver operating characteristic (ROC) curve and Kolmogorov-Smirnov test (K-S test). The area under the ROC curve was found to be 0.67. Logistic regression confirmed the validity of digital weight scale relative to the Nintendo Wii. The D statistics value from the K-S test was found to be 0.16, which confirmed that there was no significant difference in measurement between the equipment. [Conclusion] The digital weight scale is an accurate tool for measuring limb load asymmetry. The low price, easy availability, and maneuverability make it a good potential tool in clinical settings for measuring limb load asymmetry.

Comparison of Digital 12-Lead ECG and Digital 12-Lead Holter ECG Recordings in Healthy Male Subjects: Results from a Randomized, Double-Blinded, Placebo-Controlled Clinical Trial.

PubMed

Wang, Duolao; Bakhai, Ameet; Arezina, Radivoj; Täubel, Jörg

2016-11-01

Electrocardiogram (ECG) variability is greatly affected by the ECG recording method. This study aims to compare Holter and standard ECG recording methods in terms of central locations and variations of ECG data. We used the ECG data from a double-blinded, placebo-controlled, randomized clinical trial and used a mixed model approach to assess the agreement between two methods in central locations and variations of eight ECG parameters (Heart Rate, PR, QRS, QT, RR, QTcB, QTcF, and QTcI intervals). A total of 34 heathy male subjects with mean age of 25.7 ± 4.78 years were randomized to receive either active drug or placebo. Digital 12-lead ECG and digital 12-lead Holter ECG recordings were performed to assess ECG variability. There are no significant differences in least square mean between the Holter and the standard method for all ECG parameters. The total variance is consistently higher for the Holter method than the standard method for all ECG parameters except for QRS. The intraclass correlation coefficient (ICC) values for the Holter method are consistently lower than those for the standard method for all ECG parameters except for QRS, in particular, the ICC for QTcF is reduced from 0.86 for the standard method to 0.67 for the Holter method. This study suggests that Holter ECGs recorded in a controlled environment are not significantly different but more variable than those from the standard method. © 2016 Wiley Periodicals, Inc.

Are K-12 learners motivated in physical education? A meta-analysis.

PubMed

Chen, Senlin; Chen, Ang; Zhu, Xihe

2012-03-01

Previous studies devoted to K-12 learner motivation in physical education share a general assumption that students may lack motivation. This meta-analytic study examined published original studies (n = 79) to determine students' motivation level and the association between motivation and outcomes. Original means of motivation measures were converted and aggregated to determine motivation levels. Correlation effect sizes were calculated to determine the association between motivation and outcome measures. The analyses revealed that K-12 students are motivated regardless of the theoretical constructs used in the studies (M > 50). The correlation effect sizes (r = .20-.30, p < .05) indicate a weak association between motivation and outcome. The findings suggest a need to involve meaningful learning and pedagogy variables in motivation research.

Rethinking Virtual Reference

ERIC Educational Resources Information Center

Tenopir, Carol

2004-01-01

Virtual reference services seem a natural extension of libraries digital collections and the emphasis on access to the library anytime, anywhere. If patrons use the library from home, it makes sense to provide them with person-to-person online reference. The Library of Congress (LC), OCLC, and several large library systems have developed and…

An Environmental Education Program (K-12), Based on Environmental Encounters

ERIC Educational Resources Information Center

Stapp, William B.

1971-01-01

Describes a strategy for development and implementation of a comprehensive environmental education program (K-12) which can be integrated into existing curriculum of a school. Environmental encounters" stressed as meaningful approaches to goal achievement. Philosophy of spaceship earth" is fundamental to the program. (LK)

Digital flight control research

NASA Technical Reports Server (NTRS)

Potter, J. E.; Stern, R. G.; Smith, T. B.; Sinha, P.

1974-01-01

The results of studies which were undertaken to contribute to the design of digital flight control systems, particularly for transport aircraft are presented. In addition to the overall design considerations for a digital flight control system, the following topics are discussed in detail: (1) aircraft attitude reference system design, (2) the digital computer configuration, (3) the design of a typical digital autopilot for transport aircraft, and (4) a hybrid flight simulator.

Active commuting among K-12 educators: a study examining walking and biking to work.

PubMed

Bopp, Melissa; Hastmann, Tanis J; Norton, Alyssa N

2013-01-01

Walking and biking to work, active commuting (AC) is associated with many health benefits, though rates of AC remain low in the US. K-12 educators represent a significant portion of the workforce, and employee health and associated costs may have significant economic impact. Therefore, the purpose of this study was to examine the current rates of AC and factors associated with AC among K-12 educators. A volunteer sample of K-12 educators (n = 437) was recruited to participate in an online survey. Participants responded about AC patterns and social ecological influences on AC (individual, interpersonal, institutional, community, and environmental factors). t-tests and ANOVAs examined trends in AC, and Pearson correlations examined the relationship between AC and dependent variables. Multiple regression analysis determined the relative influence of individual, interpersonal, institutional, community, and environmental levels on AC. Participants actively commuted 0.51 ± 1.93 times/week. There were several individual, interpersonal, institutional, community, and environmental factors significantly related to AC. The full model explained 60.8% of the variance in AC behavior. This study provides insight on the factors that determine K-12 educators mode of commute and provide some insight for employee wellness among this population.

Role of alkali carbonate and salt in topochemical synthesis of K1/2Na1/2NbO3 and NaNbO3 templates

NASA Astrophysics Data System (ADS)

Lee, Jae-Seok; Jeon, Jae-Ho; Choi, Si-Young

2013-11-01

Since the properties of lead-free piezoelectric materials have thus far failed to meet those of lead-based materials, either chemical doping or morphological texturing should be employed to improve the piezoelectric properties of lead-free piezoelectric ceramics. The goal of this study was to synthesize plate-like K1/2Na1/2NbO3 and NaNbO3 particles, which are the most favorable templates for morphological texturing of K1/2Na1/2NbO3 ceramics. To achieve this goal, Bi2.5Na3.5Nb5O18 precursors in a plate-like shape were first synthesized and subsequently converted into K1/2Na1/2NbO3 or NaNbO3 particles that retain the morphology of Bi2.5Na3.5Nb5O18. In this study, we found that sodium or potassium carbonate does not play a major role in converting the Bi2.5Na3.5Nb5O18 precursor to K1/2Na1/2NbO3 or NaNbO3, on the contrary to previous reports; however, the salt contributes to the conversion reaction. All synthesis processes have been performed via a molten salt method, and scanning electron microscopy, scanning probe microscopy, and inductively coupled plasma mass spectroscopy were used to characterize the synthesized K1/2Na1/2NbO3 or NaNbO3 templates.

A network model for biofilm development in Escherichia coli K-12.

PubMed

Shalá, Andrew A; Restrepo, Silvia; González Barrios, Andrés F

2011-09-22

In nature, bacteria often exist as biofilms. Biofilms are communities of microorganisms attached to a surface. It is clear that biofilm-grown cells harbor properties remarkably distinct from planktonic cells. Biofilms frequently complicate treatments of infections by protecting bacteria from the immune system, decreasing antibiotic efficacy and dispersing planktonic cells to distant body sites. In this work, we employed enhanced Boolean algebra to model biofilm formation. The network obtained describes biofilm formation successfully, assuming - in accordance with the literature - that when the negative regulators (RscCD and EnvZ/OmpR) are off, the positive regulator (FlhDC) is on. The network was modeled under three different conditions through time with satisfactory outcomes. Each cluster was constructed using the K-means/medians Clustering Support algorithm on the basis of published Affymetrix microarray gene expression data from biofilm-forming bacteria and the planktonic state over four time points for Escherichia coli K-12. The different phenotypes obtained demonstrate that the network model of biofilm formation can simulate the formation or repression of biofilm efficiently in E. coli K-12.

Trends in reference usage statistics in an academic health sciences library.

PubMed

De Groote, Sandra L; Hitchcock, Kristin; McGowan, Richard

2007-01-01

To examine reference questions asked through traditional means at an academic health sciences library and place this data within the context of larger trends in reference services. Detailed data on the types of reference questions asked were collected during two one-month periods in 2003 and 2004. General statistics documenting broad categories of questions were compiled over a fifteen-year period. Administrative data show a steady increase in questions from 1990 to 1997/98 (23,848 to 48,037, followed by a decline through 2004/05 to 10,031. The distribution of reference questions asked over the years has changed-including a reduction in mediated searches 2,157 in 1990/91 to 18 in 2004/05, an increase in instruction 1,284 in 1993/94 to 1,897 in 2004/05 and an increase in digital reference interactions 0 in 1999/2000 to 581 in 2004/05. The most commonly asked questions at the current reference desk are about journal holdings 19%, book holdings 12%, and directional issues 12%. This study provides a unique snapshot of reference services in the contemporary library, where both online and offline services are commonplace. Changes in questions have impacted the way the library provides services, but traditional reference remains the core of information services in this health sciences library.

Competency-Based Education: A New Architecture for K-12 Schooling

ERIC Educational Resources Information Center

Colby, Rose L.

2017-01-01

"Competency-Based Education" introduces educators to a new model for anytime, anywhere schooling and provides tools and curriculum resources for redesigning the traditional structures of K-12 schools. Based on pioneering work across multiple states, the book shows how educators can design central elements of competency-based…

Quality assurance of reference standards from nine European solar-ultraviolet monitoring laboratories.

PubMed

Gröbner, Julian; Rembges, Diana; Bais, Alkiviadis F; Blumthaler, Mario; Cabot, Thierry; Josefsson, Weine; Koskela, Tapani; Thorseth, Trond M; Webb, Ann R; Wester, Ulf

2002-07-20

A program for quality assurance of reference standards has been initiated among nine solar-UV monitoring laboratories. By means of a traveling lamp package that comprises several 1000-W ANSI code DXW-type quartz-halogen lamps, a 0.1-ohm shunt, and a 6-1/2 digit voltmeter, the irradiance scales used by the nine laboratories were compared with one another; a relative uncertainty of 1.2% was found. The comparison of 15 reference standards yielded differences of as much as 9%; the average difference was less than 3%.

Educating Tomorrow's Workforce: A Report on the Semiconductor Industry's Commitment to Youth in K-12.

ERIC Educational Resources Information Center

Semiconductor Industry Association, San Jose, CA.

The U.S. semiconductor industry, now the nation's largest manufacturing industry, displays its commitment to training its current workers and educating future workers by supporting educational efforts on the K-12 level. This catalog describes innovative actions by 16 Semiconductor Industry Association companies to improve education at the K-12…

12 CFR 1401.1 - Cross-references to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 12 Banks and Banking 7 2011-01-01 2011-01-01 false Cross-references to employee ethical conduct... INSURANCE CORPORATION EMPLOYEE RESPONSIBILITIES AND CONDUCT § 1401.1 Cross-references to employee ethical... the Farm Credit System Insurance Corporation are subject to the Standards of Ethical Conduct for...

12 CFR 1401.1 - Cross-references to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Cross-references to employee ethical conduct... INSURANCE CORPORATION EMPLOYEE RESPONSIBILITIES AND CONDUCT § 1401.1 Cross-references to employee ethical... the Farm Credit System Insurance Corporation are subject to the Standards of Ethical Conduct for...

12 CFR 1401.1 - Cross-references to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 12 Banks and Banking 9 2013-01-01 2013-01-01 false Cross-references to employee ethical conduct... INSURANCE CORPORATION EMPLOYEE RESPONSIBILITIES AND CONDUCT § 1401.1 Cross-references to employee ethical... the Farm Credit System Insurance Corporation are subject to the Standards of Ethical Conduct for...

12 CFR 1401.1 - Cross-references to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 12 Banks and Banking 9 2012-01-01 2012-01-01 false Cross-references to employee ethical conduct... INSURANCE CORPORATION EMPLOYEE RESPONSIBILITIES AND CONDUCT § 1401.1 Cross-references to employee ethical... the Farm Credit System Insurance Corporation are subject to the Standards of Ethical Conduct for...

12 CFR 1401.1 - Cross-references to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 12 Banks and Banking 10 2014-01-01 2014-01-01 false Cross-references to employee ethical conduct... INSURANCE CORPORATION EMPLOYEE RESPONSIBILITIES AND CONDUCT § 1401.1 Cross-references to employee ethical... the Farm Credit System Insurance Corporation are subject to the Standards of Ethical Conduct for...

A 12b 200kS/s 0.52mA 0.47mm2 Algorithmic A/D Converter for MEMS Applications

NASA Astrophysics Data System (ADS)

Kim, Young-Ju; Choi, Hee-Cheol; Lee, Seung-Hoon; Cho, Dongil “Dan”

This work describes a 12b 200kS/s 0.52mA 0.47mm2 ADC for sensor applications such as motor control, 3-phase power control, and CMOS image sensors simultaneously requiring ultra-low power and small size. The proposed ADC is based on the conventional algorithmic architecture with a recycling signal path to optimize sampling rate, resolution, chip area, and power consumption. The input SHA with eight input channels employs a folded-cascode amplifier to achieve a required DC gain and a high phase margin. A 3-D fully symmetric layout with critical signal lines shielded reduces the capacitor and device mismatch of the multiplying D/A converter while switched-bias power-reduction circuits minimize the power consumption of analog amplifiers. Current and voltage references are integrated on chip with optional off-chip voltage references for low glitch noise. The down-sampling clock signal selects the sampling rate of 200kS/s and 10kS/s with a further reduced power depending on applications. The prototype ADC in a 0.18μm n-well 1P6M CMOS process demonstrates a maximum measured DNL and INL within 0.40 LSB and 1.97 LSB and shows a maximum SNDR and SFDR of 55dB and 70dB at all sampling frequencies up to 200kS/s, respectively. The ADC occupies an active die area of 0.47mm2 and consumes 0.94mW at 200kS/s and 0.63mW at 10kS/s with a 1.8V supply.

Consumer Education Resource Guide, K-12. A Multi-Disciplinary Approach.

ERIC Educational Resources Information Center

Calhoun, Calfrey C.; And Others

The guide suggests methods and resources for planning learning experiences in teaching consumer education to students at the K-12 levels. The major topics and related areas are: (1) financial planning (estimating income, estimating expenses, establishing goals, making decisions, and making the financial plan); (2) buying (importance of planned…

Exploring the Effectiveness of Online Education in K-12 Environments

ERIC Educational Resources Information Center

Heafner, Tina L., Ed.; Hartshorne, Richard, Ed.; Petty, Teresa, Ed.

2015-01-01

The integration of technology in classrooms is rapidly emerging as a way to provide more educational opportunities for students. As virtual learning environments become more popular, evaluating the impact of this technology on student success is vital. "Exploring the Effectiveness of Online Education in K-12 Environments" combines…

Virginia's Opinion on K-12 Education and School Choice. School Choice Survey in the State

ERIC Educational Resources Information Center

DiPerna, Paul

2009-01-01

This statistically representative survey of 1,203 likely Virginia voters illustrates public opinion on a wide range of K-12 education issues. The underlying purpose of the Friedman Foundation's state surveys is to measure voter knowledge and attitudes toward public institutions and policies, innovative ideas, and the state's K-12 education system.…

Value Added Models and the Implementation of the National Standards of K-12 Physical Education

ERIC Educational Resources Information Center

Seymour, Clancy M.; Garrison, Mark J.

2017-01-01

The implementation of value-added models of teacher evaluation continue to expand in public education, but the effects of using student test scores to evaluate K-12 physical educators necessitates further discussion. Using the five National Standards for K-12 Physical Education from the Society of Health and Physical Educators America (SHAPE),…

Creating Access and Opportunity: Preparing African-American Male Students for STEM Trajectories PreK-12

ERIC Educational Resources Information Center

Wright, Brian L.; Counsell, Shelly L.; Goings, Ramon B.; Freeman, Hollee; Peat, Felicia

2016-01-01

Purpose: Research often neglects the full continuum of the STEM pipeline in terms of underserved and underrepresented populations. African American males, in particular, experience limited access, opportunity, and preparation along STEM trajectories preK-12. The purpose of this paper is to challenge this gap by presenting examples of preK-12…

UPSeis - Visiting Seismographs for K-12 Schools

NASA Astrophysics Data System (ADS)

Wagner, S. R.; Len, S.; Pennington, W. D.

2004-12-01

Upper Peninsula Seismic Experiments in Schools (UPSeis) is an educational program developed to engage K-12 students in hands-on activities learning about earthquakes and Earth science. The system is intended to enhance teaching earth sciences to students, typically using teleseismic and regional earthquakes recorded directly in the classroom. This seismograph is computer-based and self-contained, requiring no hook-ups to the Internet or to advanced timing devices. It is easy to operate and relatively inexpensive to purchase. The UPSeis curriculum is designed so that a seismograph operates in a classroom for two or three months at a time, allowing the recording of at least 2 to 3 very large earthquakes somewhere in the world. The system comes with classroom activities, which are broken into several units, such as 'Seismic Waves', 'The UPSeis Technique' and 'Earthquake Hazards'. Within each unit, activities are rated for the appropriate grade level. All of the units have also been correlated to the Michigan Content Standards, and are easily adaptable to other state educational content standards as well. Our intention is to assist teachers and volunteers with bringing earth science into the classroom, by making it easier to obtain and operate seismographs. Ideally, a sponsor (University or Company) will pay for a system and any related costs. We further plan to train volunteers at conferences and meetings (such as AGU or SEG) in order to train them on a system and provide them with the knowledge required to assist teachers in the classroom. The volunteer would be available to come into the school and work with the teacher and students on some of the activities, particularly after they have recorded an earthquake. In addition, the volunteer would rotate their system between local area schools every 2 or 3 months. This allows teachers to use the system for a few months without the concern for maintenance of a permanent system. For schools interested in having a

Infrared Astronomy Professional Development for K-12 Educators: WISE Telescope

NASA Astrophysics Data System (ADS)

Borders, Kareen; Mendez, B. M.

2010-01-01

K-12 educators need effective and relevant astronomy professional development. WISE Telescope (Wide-Field Infrared Survey Explorer) and Spitzer Space Telescope Education programs provided an immersive teacher professional development workshop at Arecibo Observatory in Puerto Rico during the summer of 2009. As many common misconceptions involve scale and distance, teachers worked with Moon/Earth scale, solar system scale, and distance of objects in the universe. Teachers built and used basic telescopes, learned about the history of telescopes, explored ground and satellite based telescopes, and explored and worked on models of WISE Telescope. An in-depth explanation of WISE and Spitzer telescopes gave participants background knowledge for infrared astronomy observations. We taught the electromagnetic spectrum through interactive stations. The stations included an overview via lecture and power point, the use of ultraviolet beads to determine ultraviolet exposure, the study of WISE lenticulars and diagramming of infrared data, listening to light by using speakers hooked up to photoreceptor cells, looking at visible light through diffraction glasses and diagramming the data, protocols for using astronomy based research in the classroom, and infrared thermometers to compare environmental conditions around the observatory. An overview of LIDAR physics was followed up by a simulated LIDAR mapping of the topography of Mars. We will outline specific steps for K-12 infrared astronomy professional development, provide data demonstrating the impact of the above professional development on educator understanding and classroom use, and detail future plans for additional K-12 professional development. Funding was provided by WISE Telescope, Spitzer Space Telescope, Starbucks, Arecibo Observatory, the American Institute of Aeronautics and Astronautics, and the Washington Space Grant Consortium.

Comparative multi-omics systems analysis of Escherichia coli strains B and K-12.

PubMed

Yoon, Sung Ho; Han, Mee-Jung; Jeong, Haeyoung; Lee, Choong Hoon; Xia, Xiao-Xia; Lee, Dae-Hee; Shim, Ji Hoon; Lee, Sang Yup; Oh, Tae Kwang; Kim, Jihyun F

2012-05-25

Elucidation of a genotype-phenotype relationship is critical to understand an organism at the whole-system level. Here, we demonstrate that comparative analyses of multi-omics data combined with a computational modeling approach provide a framework for elucidating the phenotypic characteristics of organisms whose genomes are sequenced. We present a comprehensive analysis of genome-wide measurements incorporating multifaceted holistic data - genome, transcriptome, proteome, and phenome - to determine the differences between Escherichia coli B and K-12 strains. A genome-scale metabolic network of E. coli B was reconstructed and used to identify genetic bases of the phenotypes unique to B compared with K-12 through in silico complementation testing. This systems analysis revealed that E. coli B is well-suited for production of recombinant proteins due to a greater capacity for amino acid biosynthesis, fewer proteases, and lack of flagella. Furthermore, E. coli B has an additional type II secretion system and a different cell wall and outer membrane composition predicted to be more favorable for protein secretion. In contrast, E. coli K-12 showed a higher expression of heat shock genes and was less susceptible to certain stress conditions. This integrative systems approach provides a high-resolution system-wide view and insights into why two closely related strains of E. coli, B and K-12, manifest distinct phenotypes. Therefore, systematic understanding of cellular physiology and metabolism of the strains is essential not only to determine culture conditions but also to design recombinant hosts.

Fostering Peace: A Comparison of Conflict Resolution Approaches for Students (K-12).

ERIC Educational Resources Information Center

Iowa Peace Inst., Grinnell.

This compilation of 12 conflict resolution models is an attempt to provide a comparable overview of approaches that teach conflict management and peacemaking skills to K-12 students, teachers, counselors, and administrators. They have been selected for inclusion because they have been used in many schools around the United States. Each is…

Engineering Education in K-12 Schools

NASA Astrophysics Data System (ADS)

Spence, Anne

2013-03-01

Engineers rely on physicists as well as other scientists and mathematicians to explain the world in which we live. Engineers take this knowledge of the world and use it to create the world that never was. The teaching of physics and other sciences as well as mathematics is critical to maintaining our national workforce. Science and mathematics education are inherently different, however, from engineering education. Engineering educators seek to enable students to develop the habits of mind critical for innovation. Through understanding of the engineering design process and how it differs from the scientific method, students can apply problem and project based learning to solve the challenges facing society today. In this talk, I will discuss the elements critical to a solid K-12 engineering education that integrates science and mathematics to solve challenges throughout the world.

Analysis of the Supporting Websites for the Use of Instructional Games in K-12 Settings

ERIC Educational Resources Information Center

Kebritchi, Mansureh; Hirumi, Atsusi; Kappers, Wendi; Henry, Renee

2009-01-01

This paper identifies resources to be included in a website designed to facilitate the integration of instructional games in K-12 settings. Guidelines and supporting components are based on a survey of K-12 educators who are integrating games, an analysis of existing instructional game websites, and summaries of literature on the use of…

Preparing Teacher Candidates for Virtual Field Placements via an Exposure to K-12 Online Teaching

ERIC Educational Resources Information Center

Luo, Tian; Hibbard, Laura; Franklin, Teresa; Moore, David Richard

2017-01-01

Aim/Purpose: The goal of this project was to determine what effects exposure to online K-12 teaching and learning activities had on teacher candidates' perceptions of K-12 online learning, how the exposure allowed teacher candidates to reach greater understanding of online pedagogy, and what effect such exposure had on teacher candidates'…

Precision digital pulse phase generator

DOEpatents

McEwan, T.E.

1996-10-08

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code. 2 figs.

Precision digital pulse phase generator

DOEpatents

McEwan, Thomas E.

1996-01-01

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code.

Dance K-12 in the Vancouver Schools: Innovating, Advocating, Educating

ERIC Educational Resources Information Center

Gilsdorf, Rie Algeo

2004-01-01

A history of the outstanding K-12 dance program in Vancouver, Washington, is provided, including various strategies used to promote its growth from a few pilot elementary schools through middle schools to an arts magnet high school. Numerous changes have been weathered by the professional dance staff, including certification challenges instigated…

Problem-Based Learning in the Physical Science Classroom, K-12

ERIC Educational Resources Information Center

McConnell, Tom J.; Parker, Joyce; Eberhardt, Janet

2018-01-01

"Problem-Based Learning in the Physical Science Classroom, K-12" will help your students truly understand concepts such as motion, energy, and magnetism in true-to-life contexts. The book offers a comprehensive description of why, how, and when to implement problem-based learning (PBL) in your curriculum. Its 14 developmentally…

Active Commuting among K-12 Educators: A Study Examining Walking and Biking to Work

PubMed Central

Bopp, Melissa; Hastmann, Tanis J.; Norton, Alyssa N.

2013-01-01

Background. Walking and biking to work, active commuting (AC) is associated with many health benefits, though rates of AC remain low in the US. K-12 educators represent a significant portion of the workforce, and employee health and associated costs may have significant economic impact. Therefore, the purpose of this study was to examine the current rates of AC and factors associated with AC among K-12 educators. Methods. A volunteer sample of K-12 educators (n = 437) was recruited to participate in an online survey. Participants responded about AC patterns and social ecological influences on AC (individual, interpersonal, institutional, community, and environmental factors). t-tests and ANOVAs examined trends in AC, and Pearson correlations examined the relationship between AC and dependent variables. Multiple regression analysis determined the relative influence of individual, interpersonal, institutional, community, and environmental levels on AC. Results. Participants actively commuted 0.51 ± 1.93 times/week. There were several individual, interpersonal, institutional, community, and environmental factors significantly related to AC. The full model explained 60.8% of the variance in AC behavior. Conclusions. This study provides insight on the factors that determine K-12 educators mode of commute and provide some insight for employee wellness among this population. PMID:24089620

Note: Suppression of kHz-frequency switching noise in digital micro-mirror devices

NASA Astrophysics Data System (ADS)

Hueck, Klaus; Mazurenko, Anton; Luick, Niclas; Lompe, Thomas; Moritz, Henning

2017-01-01

High resolution digital micro-mirror devices (DMDs) make it possible to produce nearly arbitrary light fields with high accuracy, reproducibility, and low optical aberrations. However, using these devices to trap and manipulate ultracold atomic systems for, e.g., quantum simulation is often complicated by the presence of kHz-frequency switching noise. Here we demonstrate a simple hardware extension that solves this problem and makes it possible to produce truly static light fields. This modification leads to a 47 fold increase in the time that we can hold ultracold 6Li atoms in a dipole potential created with the DMD. Finally, we provide reliable and user friendly APIs written in Matlab and Python to control the DMD.

12 CFR 336.1 - Cross-reference to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 12 Banks and Banking 4 2011-01-01 2011-01-01 false Cross-reference to employee ethical conduct... and Conduct § 336.1 Cross-reference to employee ethical conduct standards and financial disclosure... Branch-wide Standards of Ethical Conduct at 5 CFR part 2635, the Corporation regulation at 5 CFR part...

12 CFR 336.1 - Cross-reference to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Cross-reference to employee ethical conduct... and Conduct § 336.1 Cross-reference to employee ethical conduct standards and financial disclosure... Branch-wide Standards of Ethical Conduct at 5 CFR part 2635, the Corporation regulation at 5 CFR part...

12 CFR 336.1 - Cross-reference to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 12 Banks and Banking 5 2014-01-01 2014-01-01 false Cross-reference to employee ethical conduct... and Conduct § 336.1 Cross-reference to employee ethical conduct standards and financial disclosure... Branch-wide Standards of Ethical Conduct at 5 CFR part 2635, the Corporation regulation at 5 CFR part...

12 CFR 336.1 - Cross-reference to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 12 Banks and Banking 5 2013-01-01 2013-01-01 false Cross-reference to employee ethical conduct... and Conduct § 336.1 Cross-reference to employee ethical conduct standards and financial disclosure... Branch-wide Standards of Ethical Conduct at 5 CFR part 2635, the Corporation regulation at 5 CFR part...

12 CFR 336.1 - Cross-reference to employee ethical conduct standards and financial disclosure regulations.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 12 Banks and Banking 5 2012-01-01 2012-01-01 false Cross-reference to employee ethical conduct... and Conduct § 336.1 Cross-reference to employee ethical conduct standards and financial disclosure... Branch-wide Standards of Ethical Conduct at 5 CFR part 2635, the Corporation regulation at 5 CFR part...

The Efficiency and Effectiveness of the K-12 Energy Technology Education Promotion Centers in Taiwan

ERIC Educational Resources Information Center

Lee, Lung-Sheng

2013-01-01

In order to promote energy literacy for graders K-12, the Ministry of Education (MOE) in Taiwan initiated a K-12 Energy Technology Education Project in September 2010. This 40-month project has one project office affiliated to a university, and 18 promotion centers affiliated to 18 schools--including 5 regional centers for upper-secondary schools…

An Exploratory Study on K-12 Teachers' Use of Technology and Multimedia in the Classroom

ERIC Educational Resources Information Center

Martin, Florence; Carr, Marsha L.

2015-01-01

21st century has seen new technology and multimedia made available for integration in K-12 classrooms. This exploratory study examines K-12 teachers' use of technology and multimedia in the classroom in two southern counties in the Southeastern United States. The purpose of the study was to answer the following five research questions: 1) What…

Accuracy of Digital vs. Conventional Implant Impressions

PubMed Central

Lee, Sang J.; Betensky, Rebecca A.; Gianneschi, Grace E.; Gallucci, German O.

2015-01-01

The accuracy of digital impressions greatly influences the clinical viability in implant restorations. The aim of this study is to compare the accuracy of gypsum models acquired from the conventional implant impression to digitally milled models created from direct digitalization by three-dimensional analysis. Thirty gypsum and 30 digitally milled models impressed directly from a reference model were prepared. The models were scanned by a laboratory scanner and 30 STL datasets from each group were imported to an inspection software. The datasets were aligned to the reference dataset by a repeated best fit algorithm and 10 specified contact locations of interest were measured in mean volumetric deviations. The areas were pooled by cusps, fossae, interproximal contacts, horizontal and vertical axes of implant position and angulation. The pooled areas were statistically analysed by comparing each group to the reference model to investigate the mean volumetric deviations accounting for accuracy and standard deviations for precision. Milled models from digital impressions had comparable accuracy to gypsum models from conventional impressions. However, differences in fossae and vertical displacement of the implant position from the gypsum and digitally milled models compared to the reference model, exhibited statistical significance (p<0.001, p=0.020 respectively). PMID:24720423

[Digital gigantism of the foot: a clinical study of 12 cases].

PubMed

Wang, Hai-hua; Tian, Guang-lei; Zhu, Yin; Zhang, You-le; Zhao, Jun-hui; Tian, Wen

2008-03-15

To summarize the clinical characteristic and outcome of digital gigantism of the foot. Retrospectively analyze the clinical documents of cases of digital gigantism of the foot. Twelve 12 cases with 13 feet in this study included 8 male and 4 female with an average 4.6-years-old. All the deformities were found at birth. Multiple toes involved were more than single toe, and tibial toe involved more than fibular. Forefoot was enlarged. All the phalanges involved and partial metatarsal bones were enlarged. Marked increase in subcutaneous fat was found in all cases in the operation which infiltrated interossei and articular capsules. The appearance of the nerves and its branches in the foot were normal and fat infiltrating was not discovered. The operation types included debulking, epiphyseal arrest, amputation, nerve stripping and anastomosis. Seven cases were followed up with mean periods 25.6 months. Functional evaluation according to a criterion formulated by author revealed a result of 2 excellent, 2 good and 3 fair. Digital gigantism of the foot is an uncommon congenital deformity of the foot characterized by overgrowth of both the soft-tissue and the osseous elements of the enlarged toe and forefoot. Surgical treatment is the unique method, and the goal is to reduce the size of the foot to allow fitting regular shoes and walking readily. There are several types of operations which to be chosen. The indication, the timing of operative intervention and the selection of operation type should be paid more attention.

The Reference Elevation Model of Antarctica (REMA): A High Resolution, Time-Stamped Digital Elevation Model for the Antarctic Ice Sheet

NASA Astrophysics Data System (ADS)

Howat, I.; Noh, M. J.; Porter, C. C.; Smith, B. E.; Morin, P. J.

2017-12-01

We are creating the Reference Elevation Model of Antarctica (REMA), a continuous, high resolution (2-8 m), high precision (accuracy better than 1 m) reference surface for a wide range of glaciological and geodetic applications. REMA will be constructed from stereo-photogrammetric Digital Surface Models (DSM) extracted from pairs of submeter resolution DigitalGlobe satellite imagery and vertically registred to precise elevations from near-coincident airborne LiDAR, ground-based GPS surveys and Cryosat-2 radar altimetry. Both a seamless mosaic and individual, time-stamped DSM strips, collected primarily between 2012 and 2016, will be distributed to enable change measurement. These data will be used for mapping bed topography from ice thickness, measuring ice thickness changes, constraining ice flow and geodynamic models, mapping glacial geomorphology, terrain corrections and filtering of remote sensing observations, and many other science tasks. Is will also be critical for mapping ice traverse routes, landing sites and other field logistics planning. REMA will also provide a critical elevation benchmark for future satellite altimetry missions including ICESat-2. Here we report on REMA production progress, initial accuracy assessment and data availability.

New K-12 Science Education Standards May Face Implementation Challenges

NASA Astrophysics Data System (ADS)

Kumar, Mohi

2013-04-01

Kindergarten is not just a place to learn letters and numbers, practice finger painting, and listen to story time. If a new set of national science standards is adopted, it will also be the start of a carefully planned effort to engage students in science-based activities throughout their K-12 academic careers.

Types, Subjects, and Purposes of K-12 Online Learning Interactions

ERIC Educational Resources Information Center

Borup, Jered

2013-01-01

Although K-12 online learning has experienced exceptional growth, research in the area has lagged behind. This dissertation addressed this gap in the literature using a multiple article dissertation format. The first article used survey data from two online English courses at the Open High School of Utah (OHSU) to examine students' reported…

Examining Student-Adult Relationships during K-12 School Age Years

ERIC Educational Resources Information Center

Lappi, Shelly J.

2012-01-01

This study examined the relationship between dependent and independent variables and the effects relationships have on K-12 students as they struggle through life stressors. Thus, the research study was based upon this over arching question: How does having positive student-adult relationships impact a student's ability to cope with life…

The Condition of K-12 Public Education in Maine: 2009

ERIC Educational Resources Information Center

Donis-Keller, Christine; Silvernail, David L.

2009-01-01

This twelfth edition of "The Condition of K-12 Public Education in Maine" is designed to provide Maine citizens, legislators, and educators a yearly report on the state of Maine public schools and education. This new edition updates educational information which appeared in earlier editions, and also provides information on several new…

The Condition of K-12 Public Education in Maine: 2006

ERIC Educational Resources Information Center

Gravelle, Paula B.; Silvernail, David L.

2006-01-01

This tenth edition of "The Condition of K-12 Public Education in Maine" is designed to provide Maine citizens, legislators, and educators a yearly report on the state of Maine public schools and education. This new edition updates educational information which appeared in earlier editions, and also provides information on several new…

Student Recommendations for Improving Nutrition in America's K-12 Schools

ERIC Educational Resources Information Center

NCSSSMST Journal, 2006

2006-01-01

Co-hosted by the National Consortium for Specialized Secondary Schools of Mathematics, Science, and Technology (NCSSSMST) and The Keystone Center, the third annual Keystone Center Youth Policy Summit focused on Adolescent and Childhood Nutrition in America's K-12 Schools. In June 2006, 40 students from 10 math and science schools came together in…

Constitutional Requirements for Race-Conscious Policies in K-12 Education.

ERIC Educational Resources Information Center

Harvard Civil Rights Project, Cambridge, MA.

Voluntary efforts to promote racial integration in K-12 schools have met strong resistance from the courts in recent years, despite the long history of court involvement in desegregation litigation. Race-conscious policies have invoked both the integration ideals stemming from Brown v. Board of Education and the diversity rationale in higher…