Evaluating the effectiveness of technology on learning in K-12 education

Demonstrating an impact on student learning due to technology innovations is extremely important in K-12 education. Billions of dollars have been spent on technology in education in the past several years. Stakeholders are demanding to know if this investment is impacting student learning and achievement. However, the assessment of technology in K-12 education is complicated due to the changing nature of technology and all of the variables involved in education. The purpose of this paper is to discuss the rationale for evaluating technology.in education, analyze the issues involved in evaluation, review current research on the impact of technology on student learning, and discuss guidelines for effective assessment of technology in K-12 education

The search for exudates from Eurasian watermilfoil and hydrilla

Secondary metabolites are produced by aquatic plants, and in some instances, exudation of these metabolites into the surrounding water has been detected. To determine whether infestations of Eurasian watermilfoil or hydrilla produce such exudates, plant tissues and water samples were collected from laboratory cultures and pond populations and were analyzed using solid phase extraction, HPLC, and various methods of mass spectrometry including electrospray ionization, GC/MS, electron impact and chemical ionization. Previously reported compounds such as tellimagrandin II (from Eurasian watermilfoil) and a caffeic acid ester (from hvdrilla), along with a newly discovered flavonoid, cyanidin 3 dimalonyl glucoside (from hydrilla), were readily detected in plant tissues used in this research but were not detected in any of the water samples. If compounds are being released, as suggested by researchers using axenic cultures, we hypothesize that they may be rapidly degraded by bacteria and therefore undetectable

Landsat Data Continuity Mission (LDCM) Flight Dynamics System (FDS)

The Landsat Data Continuity Mission (LDCM) will be launched in January 2013 to continue the legacy of Landsat land imagery collection that has been on-going for the past 40 years. While the overall mission and science goals are designed to produce the SAME data over the years, the ground systems designed to support the mission objectives have evolved immensely. The LDCM Flight Dynamics System (FDS) currently being tested and deployed for operations is highly automated and well integrated with the other ground system elements. The FDS encompasses the full suite of flight dynamics functional areas, including orbit and attitude determination and prediction, orbit and attitude maneuver planning and execution, and planning product generation. The integration of the orbit, attitude, maneuver, and products functions allows a very smooth flow for daily operations support with minimal input needed from the operator. The system also provides a valuable real-time component that monitors the on-board orbit and attitude during every ground contact and will autonomously alert the Flight Operations Team (FOT) personnel when any violations are found. This paper provides an overview of the LDCM Flight Dynamics System and a detailed description of how it is used to support space operations. For the first time on a Goddard Space Flight Center (GSFC)-managed mission, the ground attitude and orbits systems are fully integrated into a cohesive package. The executive engine of the FDS permits three levels of automation: low, medium, and high. The high-level, which will be the standard mode for LDCM, represents nearly lights-out operations. The paper provides an in-depth look at these processes within the FDS in support of LDCM in all mission phases

LandSAT Data Continuity Mission (LDCM) Safe Operations Ascent Design

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Landsat Data Continuity Mission (LDCM) Ascent and Operational Orbit Design

For the past 40-years, Landsat Satellites have collected Earth's continental data and enabled scientists to assess change in the Earth's landscape. The Landsat Data Continuity Mission (LDCM) is the next generation satellite supporting the Landsat science program. LDCM will fly a 16-day ground repeat cycle, Sun-synchronous, frozen orbit with a mean local time of the descending node ranging between 10:10 am and 10:15 am. This paper presents the preliminary ascent trajectory design from the injection orbit to its final operational orbit. The initial four burn ascent design is shown to satisfy all the LDCM mission goals and requirement and to allow for adequate flexibility in re-planning the ascent

The WorkingWell Smartphone App for Individuals with Serious Mental Illnesses: A Proof-of-Concept, Mixed Methods Feasibility Study (Preprint)

Background: The disparities in employment for individuals with serious mental illnesses (SMI) have been well documented, as have the benefits of work. The benefits of mobile technology in providing accessible, in-the-moment support for these individuals has been demonstrated. The WorkingWell mobile app was developed to meet the need for accessible follow-along supports for individuals with SMI in the workplace. Objective: We explore the usability, usage, usefulness and overall feasibility of the WorkingWell mobile app with individuals with SMI receiving community-based services and actively employed. Methods: In this proof-of-concept, mixed methods, two-month feasibility study (N=40), employed individuals with SMI were recruited in mental health agencies. Participants completed surveys regarding background characteristics and cellphone use at enrollment; and responded to interview items regarding app usability, usage and usefulness in technical assistance calls at one, two, four and six weeks of study participation and in the exit interview at 8 weeks. Data on the frequency of app usage were downloaded and monitored on a daily basis. A version of the System Usability Scale (SUS) was administered in the exit interview. Feasibility was determined by the percent of users completing the study. General impressions were obtained from users regarding user support materials, technical assistance, and study procedures. Results: Over half of the participants were male (60%, 24/40). The majority were age 55 or under (70%, 28/40), Caucasian (80%, 32/40), had less than a 4-year college education (78%, 31/40), were employed part-time (98%, 39/40), had been working more than six months (60%, 24/40), and indicated a diagnosis of bipolar, schizoaffective or depressive disorder (84%, 16/25). The vast majority of participants owned cellphones (95%, 38/40), using them multiple times per day (83%, 33/40). Their average rating on SUS usability items was 3.93 (SD = 0.77; range = 1.57 to 5.00), reflecting positive responses. Participants, in general, indicated WorkingWell was “very easy”, “straightforward”, “simple”, and “user-friendly”. Usability challenges were related to personal issues (e.g., memory) or to difficulties with the phone or app. Data on app usage varied considerably. The most frequent navigations were to the home screen, followed by Rate My Day and My Progress, and then by Manage the Moment and Remind Me. The app was described as useful by most study participants; 86% (30/35) agreed the app would help them manage better on the job. Thirty-five of the 40 original participants (87%) completed the study. Conclusions: The WorkingWell app is a feasible approach to providing accessible, as-needed employment support for individuals with SMI. The app would benefit from additional modifications to address recommendations from feasibility testing. Controlled research with larger samples, more diverse in individual characteristics and workplace settings, is essential to demonstrating the effectiveness of the app

The 1990 update to strategy for exploration of the inner planets

The Committee on Planetary and Lunar Exploration (COMPLEX) has undertaken to review and revise the 1978 report Strategy for Exploration of the Inner Planets, 1977-1987. The committee has found the 1978 report to be generally still pertinent. COMPLEX therefore issues its new report in the form of an update. The committee reaffirms the basic objectives for exploration of the planets: to determine the present state of the planets and their satellites, to understand the processes active now and at the origin of the solar system, and to understand planetary evolution, including appearance of life and its relation to the chemical history of the solar system

Parenting and families in Australia

Using Wave 1 of the Longitudinal Study of Australian Children (LSAC) dataset, this paper examines parenting styles and family functioning; factors influencing parents\u27 feelings and perceptions about the way they parent their children; the roles and contributions of parents who do not live with their children; feelings of stress and sources of social support for parents; and the relationship of parenting practices to child outcomes

Vaginal dysbiosis increases risk of preterm fetal membrane rupture, neonatal sepsis and is exacerbated by erythromycin

© 2018 The Author(s). Background: Preterm prelabour rupture of the fetal membranes (PPROM) precedes 30% of preterm births and is a risk factor for early onset neonatal sepsis. As PPROM is strongly associated with ascending vaginal infection, prophylactic antibiotics are widely used. The evolution of vaginal microbiota compositions associated with PPROM and the impact of antibiotics on bacterial compositions are unknown. Methods: We prospectively assessed vaginal microbiota prior to and following PPROM using MiSeq-based sequencing of 16S rRNA gene amplicons and examined the impact of erythromycin prophylaxis on bacterial load and community structures. Results: In contrast to pregnancies delivering at term, vaginal dysbiosis characterised by Lactobacillus spp. depletion was present prior to the rupture of fetal membranes in approximately a third of cases (0% vs. 27%, P=0.026) and persisted following membrane rupture (31%, P=0.005). Vaginal dysbiosis was exacerbated by erythromycin treatment (47%, P=0.00009) particularly in women initially colonised by Lactobacillus spp. Lactobacillus depletion and increased relative abundance of Sneathia spp. were associated with subsequent funisitis and early onset neonatal sepsis. Conclusions: Our data show that vaginal microbiota composition is a risk factor for subsequent PPROM and is associated with adverse short-term maternal and neonatal outcomes. This highlights vaginal microbiota as a potentially modifiable antenatal risk factor for PPROM and suggests that routine use of erythromycin for PPROM be re-examined