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Sample records for achieve maximum impact

  1. Maximum Impact.

    ERIC Educational Resources Information Center

    George, Stephen C.

    1996-01-01

    Under California law, developers are required to pay school districts impact fees of $1.84 per eligible square foot. However, the Huntington (California) School District says the state-mandated fee falls far short of expenses and attempts to convince developers to increase the fee voluntarily. The Utah State legislature recently outlawed…

  2. Dissolution performance of binary amorphous drug combinations--Impact of a second drug on the maximum achievable supersaturation.

    PubMed

    Trasi, Niraj S; Taylor, Lynne S

    2015-12-30

    An increased number of amorphous formulations of poorly water soluble drugs are being introduced into the market due to their higher transient solubility and thus faster absorption and higher bioavailability. While most amorphous drug products contain a single drug substance, there is a growing trend towards co-formulating compounds in the same dosage form to improve patient compliance. The purpose of the present work was to evaluate the dissolution behavior and maximum achievable solution concentrations of amorphous solid dispersions of co-formulated ritonavir and lopinavir, and to compare the results with individual amorphous solid dispersion formulations. Dispersions of ritonavir and lopinavir were prepared in polyvinylpyrrolidone (PVP) or hydroxypropylmethylcellulose acetate succinate (HPMCAS) at a 20% (w/w) total drug loading, both alone and in combination, at three different lopinavir:ritonavir weight ratios. Amorphous films containing both drugs, but no polymer, were also prepared. The dissolution behavior of the dispersions and the amorphous films in non-sink conditions was evaluated, using ultracentrifugation to separate any colloidal material from molecularly dissolved drug. Nanoparticle tracking analysis was used to characterize colloidal material formed during the dissolution process. Results from the dissolution study revealed that, although supersaturated solutions resulted following dissolution, the maximum achievable concentration of each drug, when present in combination, was dramatically lower than when the individual dispersions were dissolved. The maximum achievable solution concentration for systems containing both drugs was found to decrease as the mole fraction of the drug in the amorphous phase decreased. The type of polymer used to formulate the dispersion also appeared to influence the dissolution behavior whereby the HPMCAS dispersions dissolved rapidly, resulting in the generation of a nanodroplets, while the PVP dispersions did not

  3. Maximum Achievable Control Technology Standards in Region 7

    EPA Pesticide Factsheets

    Maximum Achievable Control Technology Standards (MACTs) are applicable requirements under the Title V operating permit program. This is a resource for permit writers and reviewers to learn about the rules and explore other helpful tools.

  4. Ethylene Production Maximum Achievable Control Technology (MACT) Compliance Manual

    EPA Pesticide Factsheets

    This July 2006 document is intended to help owners and operators of ethylene processes understand and comply with EPA's maximum achievable control technology standards promulgated on July 12, 2002, as amended on April 13, 2005 and April 20, 2006.

  5. Professional Learning Communities Impact on Student Achievement

    ERIC Educational Resources Information Center

    Hamilton, Jan L.

    2013-01-01

    This study examined the impact of the Professional Learning Community model on student achievement in the state of California. Specifically, the study compared student achievement between two school types: Professional Learning Community schools and Non Professional Learning schools. The research utilized existing API scores for California schools…

  6. Impact of School Technology on Student Achievement

    ERIC Educational Resources Information Center

    Young, Larry Douglas, Jr.

    2012-01-01

    This study provides an overview of the impact of school technology on elementary students in grades three through five attending public schools in Indiana. The investigation focused on the impact of various technologies on student achievement as measured on Indiana Statewide Testing for Educational Progress-Plus (ISTEP+). Various comparisons were…

  7. The Impact of Reading Achievement on Overall Academic Achievement

    ERIC Educational Resources Information Center

    Churchwell, Dawn Earheart

    2009-01-01

    This study examined the relationship between reading achievement and achievement in other subject areas. The purpose of this study was to determine if there was a correlation between reading scores as measured by the Standardized Test for the Assessment of Reading (STAR) and academic achievement in language arts, math, science, and social studies…

  8. Impact sensitivity and the maximum heat of detonation.

    PubMed

    Politzer, Peter; Murray, Jane S

    2015-10-01

    We demonstrate that a large heat of detonation is undesirable from the standpoint of the impact sensitivity of an explosive and also unnecessary from the standpoints of its detonation velocity and detonation pressure. High values of the latter properties can be achieved even with a moderate heat of detonation, and this in turn enhances the likelihood of relatively low sensitivity.

  9. Achieving Maximum Power from Thermoelectric Generators with Maximum-Power-Point-Tracking Circuits Composed of a Boost-Cascaded-with-Buck Converter

    NASA Astrophysics Data System (ADS)

    Park, Hyunbin; Sim, Minseob; Kim, Shiho

    2015-06-01

    We propose a way of achieving maximum power and power-transfer efficiency from thermoelectric generators by optimized selection of maximum-power-point-tracking (MPPT) circuits composed of a boost-cascaded-with-buck converter. We investigated the effect of switch resistance on the MPPT performance of thermoelectric generators. The on-resistances of the switches affect the decrease in the conversion gain and reduce the maximum output power obtainable. Although the incremental values of the switch resistances are small, the resulting difference in the maximum duty ratio between the input and output powers is significant. For an MPPT controller composed of a boost converter with a practical nonideal switch, we need to monitor the output power instead of the input power to track the maximum power point of the thermoelectric generator. We provide a design strategy for MPPT controllers by considering the compromise in which a decrease in switch resistance causes an increase in the parasitic capacitance of the switch.

  10. Maximum achievable efficiency in near-field coupled power-transfer systems.

    PubMed

    Zargham, Meysam; Gulak, P Glenn

    2012-06-01

    Wireless power transfer is commonly realized by means of near-field inductive coupling and is critical to many existing and emerging applications in biomedical engineering. This paper presents a closed form analytical solution for the optimum load that achieves the maximum possible power efficiency under arbitrary input impedance conditions based on the general two-port parameters of the network. The two-port approach allows one to predict the power transfer efficiency at any frequency, any type of coil geometry and through any type of media surrounding the coils. Moreover, the results are applicable to any form of passive power transfer such as provided by inductive or capacitive coupling. Our results generalize several well-known special cases. The formulation allows the design of an optimized wireless power transfer link through biological media using readily available EM simulation software. The proposed method effectively decouples the design of the inductive coupling two-port from the problem of loading and power amplifier design. Several case studies are provided for typical applications.

  11. Mind the bubbles: achieving stable measurements of maximum hydraulic conductivity through woody plant samples

    PubMed Central

    Espino, Susana; Schenk, H. Jochen

    2011-01-01

    The maximum specific hydraulic conductivity (kmax) of a plant sample is a measure of the ability of a plants’ vascular system to transport water and dissolved nutrients under optimum conditions. Precise measurements of kmax are needed in comparative studies of hydraulic conductivity, as well as for measuring the formation and repair of xylem embolisms. Unstable measurements of kmax are a common problem when measuring woody plant samples and it is commonly observed that kmax declines from initially high values, especially when positive water pressure is used to flush out embolisms. This study was designed to test five hypotheses that could potentially explain declines in kmax under positive pressure: (i) non-steady-state flow; (ii) swelling of pectin hydrogels in inter-vessel pit membranes; (iii) nucleation and coalescence of bubbles at constrictions in the xylem; (iv) physiological wounding responses; and (v) passive wounding responses, such as clogging of the xylem by debris. Prehydrated woody stems from Laurus nobilis (Lauraceae) and Encelia farinosa (Asteraceae) collected from plants grown in the Fullerton Arboretum in Southern California, were used to test these hypotheses using a xylem embolism meter (XYL'EM). Treatments included simultaneous measurements of stem inflow and outflow, enzyme inhibitors, stem-debarking, low water temperatures, different water degassing techniques, and varied concentrations of calcium, potassium, magnesium, and copper salts in aqueous measurement solutions. Stable measurements of kmax were observed at concentrations of calcium, potassium, and magnesium salts high enough to suppress bubble coalescence, as well as with deionized water that was degassed using a membrane contactor under strong vacuum. Bubble formation and coalescence under positive pressure in the xylem therefore appear to be the main cause for declining kmax values. Our findings suggest that degassing of water is essential for achieving stable and precise

  12. Effect of Date and Location on Maximum Achievable Altitude for a Solar Powered Aircraft

    NASA Technical Reports Server (NTRS)

    Colozza, Anthony J.

    1997-01-01

    The maximum altitude attainable for a solar powered aircraft without any energy storage capability is examined. Mission profiles for a solar powered aircraft were generated over a range of latitudes and dates. These profiles were used to determine which latitude-date combinations produced the highest achieavable altitude. Based on the presented analysis the results have shown that for a given time of year lower latitudes produced higher maximum altitudes. For all the cases examined the time and date which produced the highest altitude was around March at the equator.

  13. Occurrence and Impact of Insects in Maximum Growth Plantations

    SciTech Connect

    Nowak, J.T.; Berisford, C.W.

    2001-01-01

    Investigation of the relationships between intensive management practices and insect infestation using maximum growth potential studies of loblolly pine constructed over five years using a hierarchy of cultural treatments-monitoring differences in growth and insect infestation levels related to the increasing management intensities. This study shows that tree fertilization can increase coneworm infestation and demonstrated that tip moth management tree growth, at least initially.

  14. Curating NASA's Future Extraterrestrial Sample Collections: How Do We Achieve Maximum Proficiency?

    NASA Technical Reports Server (NTRS)

    McCubbin, Francis; Evans, Cynthia; Zeigler, Ryan; Allton, Judith; Fries, Marc; Righter, Kevin; Zolensky, Michael

    2016-01-01

    The Astromaterials Acquisition and Curation Office (henceforth referred to herein as NASA Curation Office) at NASA Johnson Space Center (JSC) is responsible for curating all of NASA's extraterrestrial samples. Under the governing document, NASA Policy Directive (NPD) 7100.10E "Curation of Extraterrestrial Materials", JSC is charged with "The curation of all extraterrestrial material under NASA control, including future NASA missions." The Directive goes on to define Curation as including "... documentation, preservation, preparation, and distribution of samples for research, education, and public outreach." Here we describe some of the ongoing efforts to ensure that the future activities of the NASA Curation Office are working towards a state of maximum proficiency.

  15. Slip resistance of winter footwear on snow and ice measured using maximum achievable incline

    PubMed Central

    Hsu, Jennifer; Shaw, Robert; Novak, Alison; Li, Yue; Ormerod, Marcus; Newton, Rita; Dutta, Tilak; Fernie, Geoff

    2016-01-01

    Abstract Protective footwear is necessary for preventing injurious slips and falls in winter conditions. Valid methods for assessing footwear slip resistance on winter surfaces are needed in order to evaluate footwear and outsole designs. The purpose of this study was to utilise a method of testing winter footwear that was ecologically valid in terms of involving actual human testers walking on realistic winter surfaces to produce objective measures of slip resistance. During the experiment, eight participants tested six styles of footwear on wet ice, on dry ice, and on dry ice after walking over soft snow. Slip resistance was measured by determining the maximum incline angles participants were able to walk up and down in each footwear–surface combination. The results indicated that testing on a variety of surfaces is necessary for establishing winter footwear performance and that standard mechanical bench tests for footwear slip resistance do not adequately reflect actual performance. Practitioner Summary: Existing standardised methods for measuring footwear slip resistance lack validation on winter surfaces. By determining the maximum inclines participants could walk up and down slopes of wet ice, dry ice, and ice with snow, in a range of footwear, an ecologically valid test for measuring winter footwear performance was established. PMID:26555738

  16. Slip resistance of winter footwear on snow and ice measured using maximum achievable incline.

    PubMed

    Hsu, Jennifer; Shaw, Robert; Novak, Alison; Li, Yue; Ormerod, Marcus; Newton, Rita; Dutta, Tilak; Fernie, Geoff

    2016-05-01

    Protective footwear is necessary for preventing injurious slips and falls in winter conditions. Valid methods for assessing footwear slip resistance on winter surfaces are needed in order to evaluate footwear and outsole designs. The purpose of this study was to utilise a method of testing winter footwear that was ecologically valid in terms of involving actual human testers walking on realistic winter surfaces to produce objective measures of slip resistance. During the experiment, eight participants tested six styles of footwear on wet ice, on dry ice, and on dry ice after walking over soft snow. Slip resistance was measured by determining the maximum incline angles participants were able to walk up and down in each footwear-surface combination. The results indicated that testing on a variety of surfaces is necessary for establishing winter footwear performance and that standard mechanical bench tests for footwear slip resistance do not adequately reflect actual performance. Practitioner Summary: Existing standardised methods for measuring footwear slip resistance lack validation on winter surfaces. By determining the maximum inclines participants could walk up and down slopes of wet ice, dry ice, and ice with snow, in a range of footwear, an ecologically valid test for measuring winter footwear performance was established.

  17. Impact of Orthorectification on Maximum NDVI Composite Data

    NASA Astrophysics Data System (ADS)

    Fontana, F.; Trishchenko, A.; Khlopenkov, K.; Luo, Y.; Wunderle, S.

    2009-04-01

    Normalized Difference Vegetation Index (NDVI) composite data from the 25 year NOAA AVHRR data record have repeatedly been used to study vegetation dynamics at various spatial scales, including mountain areas. However, topography and accuracy of image geometric registration significantly affect the quality of satellite data, since pixels are displaced depending on surface elevation and viewing geometry. This effect should be corrected for through the process of accurate image navigation and orthorectification in order to meet the geolocation accuracy of 1/3 of the pixel field of view for systematic observations specified by the Global Climate Observing System (GCOS) requirements. Nevertheless, so far, the orthorectification effect was ignored in most AVHRR processing systems and data sets employed for analysis of climate trends. The present study investigates the impact of orthorectification on the accuracy of NDVI composite data for a mountain region in north-western Canada at various spatial resolutions (1 km, 4 km, 5 km, and 8 km). Data from AVHRR onboard NOAA-11 (1989 and 1990) and NOAA-16 (2001, 2002, and 2003) for the month of August are considered. Data are processed using a processing system called CAPS (Canadian AVHRR Processing System) which optionally offers orthorectification and uses MODIS 250 m precisely georeferenced data as a reference imagery for improving AVHRR image navigation. Validation is performed using MODIS NDVI composite data. Obtained results demonstrate the significant impact of orthorectification on composite NDVI data in mountainous terrain. Significant differences between corrected and uncorrected data in terms of mean NDVI as well as spatial NDVI variability are observed for areas covering pronounced topography. The NDVI differences may range from +0.3 to -0.4 at local scale, although they are reduced to smaller numbers when aggregated over large areas. Correlation analysis with MODIS NDVI revealed higher linear correlation

  18. Modeling the Maximum Spreading of Liquid Droplets Impacting Wetting and Nonwetting Surfaces.

    PubMed

    Lee, Jae Bong; Derome, Dominique; Guyer, Robert; Carmeliet, Jan

    2016-02-09

    Droplet impact has been imaged on different rigid, smooth, and rough substrates for three liquids with different viscosity and surface tension, with special attention to the lower impact velocity range. Of all studied parameters, only surface tension and viscosity, thus the liquid properties, clearly play a role in terms of the attained maximum spreading ratio of the impacting droplet. Surface roughness and type of surface (steel, aluminum, and parafilm) slightly affect the dynamic wettability and maximum spreading at low impact velocity. The dynamic contact angle at maximum spreading has been identified to properly characterize this dynamic spreading process, especially at low impact velocity where dynamic wetting plays an important role. The dynamic contact angle is found to be generally higher than the equilibrium contact angle, showing that statically wetting surfaces can become less wetting or even nonwetting under dynamic droplet impact. An improved energy balance model for maximum spreading ratio is proposed based on a correct analytical modeling of the time at maximum spreading, which determines the viscous dissipation. Experiments show that the time at maximum spreading decreases with impact velocity depending on the surface tension of the liquid, and a scaling with maximum spreading diameter and surface tension is proposed. A second improvement is based on the use of the dynamic contact angle at maximum spreading, instead of quasi-static contact angles, to describe the dynamic wetting process at low impact velocity. This improved model showed good agreement compared to experiments for the maximum spreading ratio versus impact velocity for different liquids, and a better prediction compared to other models in literature. In particular, scaling according to We(1/2) is found invalid for low velocities, since the curves bend over to higher maximum spreading ratios due to the dynamic wetting process.

  19. Progress in increasing the maximum achievable output power of broad area diode lasers

    NASA Astrophysics Data System (ADS)

    Crump, P.; Wenzel, H.; Erbert, G.; Tränkle, G.

    2012-03-01

    High power broad area diode lasers provide the optical energy for all high performance laser systems, either directly or as pump sources for solid-state lasers. Continuous improvement is required in the peak achievable output power of these diode laser devices in order to enable performance improvements in full laser systems. In recent years, device technology has advanced to the point where the main limit to optical power is no longer device failure, but is instead power saturation due to various physical effects within the semiconductor device itself. For example, the combination of large optical cavity designs with advanced facet passivation means that facet failure is no longer the dominant limiting factor. Increases in the optical power therefore require firstly a clear identification of the limiting mechanisms, followed by design changes and material improvements to address these. Recent theoretical and experimental diagnostic studies at the Ferdinand-Braun-Institut have helped trace the saturation effects to three main effects: gain saturation, longitudinal-holeburning and current driven carrier leakage. Design changes based on these studies have enabled increases in the achievable emitted power density from broad area lasers. Recent experimental examples include ~100W from 100μm stripes under short-pulsed conditions, > 30W from 100μm stripes under quasi-continuous wave conditions and > 10W from 30μm stripes under continuous wave conditions. An overview of the results of the diagnostic studies performed at the FBH will be presented, and the design changes necessary to address the observed power saturation will be discussed.

  20. The Impact of Professional Learning Communities on Student Achievement

    ERIC Educational Resources Information Center

    DiNardo, Lynne M.

    2010-01-01

    Professional learning communities (PLC) are one strategy aimed at facilitating teacher professional development, with a focus on increasing student achievement. This mixed methods study investigated the impact of professional learning on student achievement. A total of 6 teachers and 121 students recruited from the third and fifth grades of a…

  1. Teacher Impact on the Academic Achievement of Students of Poverty

    ERIC Educational Resources Information Center

    Franklin, Marshalynn Morgan

    2013-01-01

    This study investigated teacher impact on the academic achievement of students of poverty. Teacher impact was analyzed based on two factors: (1) teacher emotional empathy and (2) teacher professional development experiences. The results of this study indicate a non-correlative relationship between teachers' overall emotional empathy and…

  2. Impact of Parent University on Parent Engagement and Student Achievement

    ERIC Educational Resources Information Center

    Lawless, Watechia Evelyen

    2013-01-01

    This research project examined the impact of Parent University on parental engagement and the factors that impact a parent's decision to become involved in their child's education. In addition, the aim of the research was to offer recommendations for improvement, so Parent University is able to enhance academic achievement within MNPS. The key…

  3. Curating NASA's future extraterrestrial sample collections: How do we achieve maximum proficiency?

    NASA Astrophysics Data System (ADS)

    McCubbin, Francis; Evans, Cynthia; Allton, Judith; Fries, Marc; Righter, Kevin; Zolensky, Michael; Zeigler, Ryan

    2016-07-01

    Introduction: The Astromaterials Acquisition and Curation Office (henceforth referred to herein as NASA Curation Office) at NASA Johnson Space Center (JSC) is responsible for curating all of NASA's extraterrestrial samples. Under the governing document, NASA Policy Directive (NPD) 7100.10E "Curation of Extraterrestrial Materials", JSC is charged with "The curation of all extraterrestrial material under NASA control, including future NASA missions." The Directive goes on to define Curation as including "…documentation, preservation, preparation, and distribution of samples for research, education, and public outreach." Here we describe some of the ongoing efforts to ensure that the future activities of the NASA Curation Office are working to-wards a state of maximum proficiency. Founding Principle: Curatorial activities began at JSC (Manned Spacecraft Center before 1973) as soon as design and construction planning for the Lunar Receiving Laboratory (LRL) began in 1964 [1], not with the return of the Apollo samples in 1969, nor with the completion of the LRL in 1967. This practice has since proven that curation begins as soon as a sample return mission is conceived, and this founding principle continues to return dividends today [e.g., 2]. The Next Decade: Part of the curation process is planning for the future, and we refer to these planning efforts as "advanced curation" [3]. Advanced Curation is tasked with developing procedures, technology, and data sets necessary for curating new types of collections as envisioned by NASA exploration goals. We are (and have been) planning for future curation, including cold curation, extended curation of ices and volatiles, curation of samples with special chemical considerations such as perchlorate-rich samples, curation of organically- and biologically-sensitive samples, and the use of minimally invasive analytical techniques (e.g., micro-CT, [4]) to characterize samples. These efforts will be useful for Mars Sample Return

  4. Dynamic contact angle effects onto the maximum drop impact spreading on solid surfaces

    NASA Astrophysics Data System (ADS)

    Vadillo, D. C.; Soucemarianadin, A.; Delattre, C.; Roux, D. C. D.

    2009-12-01

    This paper reports experimental investigations of drop impacts onto chemically treated surfaces with wettability from 5° to 160°. To follow in time the drop spreading, a high speed video camera was used, and it allows us to determine precisely the expansion of the drop and the profile of the free surface at the contact line. By changing the impact velocity, between less than 0.5 and 5 m/s, and the viscosity, from 1 to 100 mPa s, at constant surface tension, a broad range of Reynolds and Weber numbers is explored. This paper is divided into two parts. In the first part, the experimental drop evolution during spreading is directly reported and compared with previous works. Secondly, the emphasis is on the importance of the apparent dynamic contact angle for the prediction of the maximum spreading diameter. This achievement is manifested at low Reynolds numbers at which the matching between the experiment and the model is improved greatly.

  5. The Impact of Teacher Licensure Programs on Minority Student Achievement

    ERIC Educational Resources Information Center

    Duke, Rose S.

    2013-01-01

    This research examined the impact of teacher licensure routes, particularly those identified as either traditional or alternative on student achievement by comparing Virginia Standards of Learning (SOL) end of year scores in math and reading for minority students in grades six through eight during the period from 2005 through 2009. To compare the…

  6. Impact of Teacher's Income on Student's Educational Achievements

    ERIC Educational Resources Information Center

    Lukaš, Mirko; Samardžic, Darko

    2014-01-01

    The aim of this paper is to provide an objective overview of the impact of teacher salaries on the educational achievements of students. It is often debated about teacher salaries and improvement or jeopardizing their standard, but educational consequences that may ensue as a result of these intentions are rarely addressed. Teacher's role in…

  7. Teachers' Nonverbal Behavior and Its Impact on Student Achievement

    ERIC Educational Resources Information Center

    Chaudhry, Noureen Asghar; Arif, Manzoor

    2012-01-01

    The observational study was conducted to see the impact of teachers' nonverbal behavior on academic achievement of learners. This also investigated the relationship of nonverbal communication of teachers working in different educational institutions. Main objectives of study were to measure nonverbal behavior of teachers' both male and female…

  8. The Impact of an Online Tutoring Program on Mathematics Achievement

    ERIC Educational Resources Information Center

    Clark, Amy K.; Whetstone, Patti

    2014-01-01

    The authors explored the impact of an online tutoring program, Math Whizz (Whizz Education, 2014), on student mathematics achievement at 15 elementary schools. Students participated in the use of the Math Whizz program for the duration of the school year as a supplement to mathematics instruction. The Math Whizz program recorded such information…

  9. Essays on Gifted Education's Impact on Student Achievement

    ERIC Educational Resources Information Center

    Murphy, Patrick Ryan

    2009-01-01

    There are three self-contained essays in this dissertation. In the first essay (Chapter 2 of the dissertation) I estimate various achievement models for math and reading using the nationally representative Early Childhood Longitudinal Study, Kindergarten Class (ECLS-K) dataset. An indicator for gifted program participation captures the impact of…

  10. Energy Budget of Liquid Drop Impact at Maximum Spreading: Numerical Simulations and Experiments.

    PubMed

    Lee, Jae Bong; Derome, Dominique; Dolatabadi, Ali; Carmeliet, Jan

    2016-02-09

    The maximum spreading of an impinging droplet on a rigid surface is studied for low to high impact velocity, until the droplet starts splashing. We investigate experimentally and numerically the role of liquid properties, such as surface tension and viscosity, on drop impact using three liquids. It is found that the use of the experimental dynamic contact angle at maximum spreading in the Kistler model, which is used as a boundary condition for the CFD-VOF calculation, gives good agreement between experimental and numerical results. Analytical models commonly used to predict the boundary layer thickness and time at maximum spreading are found to be less correct, meaning that energy balance models relying on these relations have to be considered with care. The time of maximum spreading is found to depend on both the impact velocity and surface tension, and neither dependency is predicted correctly in common analytical models. The relative proportion of the viscous dissipation in the total energy budget increases with impact velocity with respect to surface energy. At high impact velocity, the contribution of surface energy, even before splashing, is still substantial, meaning that both surface energy and viscous dissipation have to be taken into account, and scaling laws depending only on viscous dissipation do not apply. At low impact velocity, viscous dissipation seems to play an important role in low-surface-tension liquids such as ethanol.

  11. Influence of MoOx interlayer on the maximum achievable open-circuit voltage in organic photovoltaic cells

    NASA Astrophysics Data System (ADS)

    Zou, Yunlong; Holmes, Russell

    2013-03-01

    Transition metal oxides including molybdenum oxide (MoOx) are characterized by large work functions and deep energy levels relative to the organic semiconductors used in photovoltaic cells (OPVs). These materials have been used in OPVs as interlayers between the indium-tin-oxide anode and the active layers to increase the open-circuit voltage (VOC) and power conversion efficiency. We examine the role of MoOx in determining the maximum achievable VOC in planar heterojunction OPVs based on the donor-acceptor pairing of boron subphthalocyanine chloride (SubPc) and C60. While causing minor changes in VOC at room temperature, the inclusion of MoOx significantly changes the temperature dependence of VOC. Devices containing no interlayer show a maximum VOC\\ of 1.2 V, while devices containing MoOx show no saturation in VOC, reaching a value of >1.4 V at 110 K. We propose that the MoOx-SubPc interface forms a dissociating Schottky junction that provides an additional contribution to VOC at low temperature. Separate measurements of photoluminescence confirm that excitons in SubPc can be quenched by MoOx. Charge transfer at this interface is by hole extraction from SubPc to MoOx, and this mechanism favors donors with a deep highest occupied molecular orbital (HOMO) energy level. Consistent with this expectation, the temperature dependence of VOC for devices constructed using a donor with a shallower HOMO level, e.g. copper phthalocyanine, is independent of the presence of MoOx.

  12. Prediction of the optimum surface orientation angles to achieve maximum solar radiation using Particle Swarm Optimization in Sabha City Libya

    NASA Astrophysics Data System (ADS)

    Mansour, F. A.; Nizam, M.; Anwar, M.

    2017-02-01

    This research aims to predict the optimum surface orientation angles in solar panel installation to achieve maximum solar radiation. Incident solar radiation is calculated using koronakis mathematical model. Particle Swarm Optimization (PSO) is used as computational method to find optimum angle orientation for solar panel installation in order to get maximum solar radiation. A series of simulation has been carried out to calculate solar radiation based on monthly, seasonally, semi-yearly and yearly period. South-facing was calculated also as comparison of proposed method. South-facing considers azimuth of 0°. Proposed method attains higher incident predictions than South-facing that recorded 2511.03 kWh/m2for monthly. It were about 2486.49 kWh/m2, 2482.13 kWh/m2and 2367.68 kWh/m2 for seasonally, semi-yearly and yearly. South-facing predicted approximately 2496.89 kWh/m2, 2472.40 kWh/m2, 2468.96 kWh/m2, 2356.09 kWh/m2for monthly, seasonally, semi-yearly and yearly periods respectively. Semi-yearly is the best choice because it needs twice adjustments of solar panel in a year. Yet it considers inefficient to adjust solar panel position in every season or monthly with no significant solar radiation increase than semi-yearly and solar tracking device still considers costly in solar energy system. PSO was able to predict accurately with simple concept, easy and computationally efficient. It has been proven by finding the best fitness faster.

  13. Impact of cognitive absorption on Facebook on students' achievement.

    PubMed

    Rouis, Sana

    2012-06-01

    In the great expansion of the social networking activity, young people are the main users whose choices have vast influence. This study uses the flow theory to gauge the impact of Facebook usage on Tunisian students' achievements, with the presumption that the high usage level might reduce students' scholar achievements. The research design suggests that this impact would vary among students with different interests for the university and multitasking capabilities. Facebook usage would develop students' satisfaction with friends and family, which could enhance their academic performance. Analyses from 161 Tunisian students show that Facebook usage does not affect significantly students' academic performance and their satisfaction with the family, whereas it decreases their actual satisfaction with friends. Yet, a high level of satisfaction of the student with his family continues to enhance his academic performance. Overall, though, Facebook usage appears to do not have a significant effect on undergraduate students' academic performance. However, this interdependency is significantly moderated by the student's interest for the university and his multitasking capabilities. Students with multitasking skills and students with initial interest for the university might experience a positive effect of Facebook usage on their studies, as they keep control over their activity and make it a beneficial leisure activity. However, students who do not have these characteristics tend to not have any significant effect. Results help to understand the psychological attitude and consequent behavior of the youths on this platform. Implications, limitations, and further research directions are offered.

  14. A novel impact identification algorithm based on a linear approximation with maximum entropy

    NASA Astrophysics Data System (ADS)

    Sanchez, N.; Meruane, V.; Ortiz-Bernardin, A.

    2016-09-01

    This article presents a novel impact identification algorithm that uses a linear approximation handled by a statistical inference model based on the maximum-entropy principle, termed linear approximation with maximum entropy (LME). Unlike other regression algorithms as artificial neural networks (ANNs) and support vector machines, the proposed algorithm requires only parameter to be selected and the impact is identified after solving a convex optimization problem that has a unique solution. In addition, with LME data is processed in a period of time that is comparable to the one of other algorithms. The performance of the proposed methodology is validated by considering an experimental aluminum plate. Time varying strain data is measured using four piezoceramic sensors bonded to the plate. To demonstrate the potential of the proposed approach over existing ones, results obtained via LME are compared with those of ANN and least square support vector machines. The results demonstrate that with a low number of sensors it is possible to accurately locate and quantify impacts on a structure and that LME outperforms other impact identification algorithms.

  15. Possible ecosystem impacts of applying maximum sustainable yield policy in food chain models.

    PubMed

    Ghosh, Bapan; Kar, T K

    2013-07-21

    This paper describes the possible impacts of maximum sustainable yield (MSY) and maximum sustainable total yield (MSTY) policy in ecosystems. In general it is observed that exploitation at MSY (of single species) or MSTY (of multispecies) level may cause the extinction of several species. In particular, for traditional prey-predator system, fishing under combined harvesting effort at MSTY (if it exists) level may be a sustainable policy, but if MSTY does not exist then it is due to the extinction of the predator species only. In generalist prey-predator system, harvesting of any one of the species at MSY level is always a sustainable policy, but harvesting of both the species at MSTY level may or may not be a sustainable policy. In addition, we have also investigated the MSY and MSTY policy in a traditional tri-trophic and four trophic food chain models.

  16. 40 CFR 63.55 - Maximum achievable control technology (MACT) determinations for affected sources subject to case...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... permitting authority, taking into consideration the cost of achieving such emission reduction and any non-air...) that the permitting authority, taking into consideration the cost of achieving such emission reduction... conveyance would be inconsistent with any Federal, State, or local law, or the application of...

  17. Analysis of Maximum Reasonably Foreseeable Accidents for the Yucca Mountain Draft Environmental Impact Statement (DEIS)

    SciTech Connect

    S.B. Ross; R.E. Best; S.J. Maheras; T.I. McSweeney

    2001-08-17

    Accidents could occur during the transportation of spent nuclear fuel and high-level radioactive waste. This paper describes the risks and consequences to the public from accidents that are highly unlikely but that could have severe consequences. The impact of these accidents would include those to a collective population and to hypothetical maximally exposed individuals (MEIs). This document discusses accidents with conditions that have a chance of occurring more often than 1 in 10 million times in a year, called ''maximum reasonably foreseeable accidents''. Accidents and conditions less likely than this are not considered to be reasonably foreseeable.

  18. Maximum surface charge density for triboelectric nanogenerators achieved by ionized-air injection: methodology and theoretical understanding.

    PubMed

    Wang, Sihong; Xie, Yannan; Niu, Simiao; Lin, Long; Liu, Chang; Zhou, Yu Sheng; Wang, Zhong Lin

    2014-10-22

    For the maximization of the surface charge density in triboelectric nanogenerators, a new method of injecting single-polarity ions onto surfaces is introduced for the generation of surface charges. The triboelectric nanogenerator's output power gets greatly enhanced and its maximum surface charge density is systematically studied, which shows a huge room for the improvement of the output of triboelectric nanogenerators by surface modification.

  19. Potential Impact of Adopting Maximum Technologies as Minimum Efficiency Performance Standards in the U.S. Residential Sector

    SciTech Connect

    Letschert, Virginie; Desroches, Louis-Benoit; McNeil, Michael; Saheb, Yamina

    2010-05-03

    The US Department of Energy (US DOE) has placed lighting and appliance standards at a very high priority of the U.S. energy policy. However, the maximum energy savings and CO2 emissions reduction achievable via minimum efficiency performance standards (MEPS) has not yet been fully characterized. The Bottom Up Energy Analysis System (BUENAS), first developed in 2007, is a global, generic, and modular tool designed to provide policy makers with estimates of potential impacts resulting from MEPS for a variety of products, at the international and/or regional level. Using the BUENAS framework, we estimated potential national energy savings and CO2 emissions mitigation in the US residential sector that would result from the most aggressive policy foreseeable: standards effective in 2014 set at the current maximum technology (Max Tech) available on the market. This represents the most likely characterization of what can be maximally achieved through MEPS in the US. The authors rely on the latest Technical Support Documents and Analytical Tools published by the U.S. Department of Energy as a source to determine appliance stock turnover and projected efficiency scenarios of what would occur in the absence of policy. In our analysis, national impacts are determined for the following end uses: lighting, television, refrigerator-freezers, central air conditioning, room air conditioning, residential furnaces, and water heating. The analyzed end uses cover approximately 65percent of site energy consumption in the residential sector (50percent of the electricity consumption and 80percent of the natural gas and LPG consumption). This paper uses this BUENAS methodology to calculate that energy savings from Max Tech for the U.S. residential sector products covered in this paper will reach an 18percent reduction in electricity demand compared to the base case and 11percent in Natural Gas and LPG consumption by 2030 The methodology results in reductions in CO2 emissions of a similar

  20. Achievement Network's Investing in Innovation Expansion: Impacts on Educator Practice and Student Achievement

    ERIC Educational Resources Information Center

    West, Martin R.; Morton, Beth A.; Herlihy, Corinne M.

    2016-01-01

    Data-based instructional programs have proliferated in American schools despite limited evidence of their effectiveness in improving educator practice and raising student achievement. We report results from a two-year school-randomized evaluation of the Achievement Network (ANet), a program providing schools with standards-aligned interim…

  1. Increasing the maximum achievable strain of a covalent polymer gel through the addition of mechanically invisible cross-links.

    PubMed

    Kean, Zachary S; Hawk, Jennifer L; Lin, Shaoting; Zhao, Xuanhe; Sijbesma, Rint P; Craig, Stephen L

    2014-09-10

    Hydrogels and organogels made from polymer networks are widely used in biomedical applications and soft, active devices for which the ability to sustain large deformations is required. The strain at which polymer networks fracture is typically improved through the addition of elements that dissipate energy, but these materials require extra work to achieve a given, desired level of deformation. Here, the addition of mechanically "invisible" supramolecular crosslinks causes substantial increases in the ultimate gel properties without incurring the added energetic costs of dissipation.

  2. The Impact and Racial Identity on Academic Achievement

    ERIC Educational Resources Information Center

    Mulzac, Anica Camela

    2012-01-01

    Research has shown that academic achievement among racial minority groups, particularly African Americans, and the majority Caucasian group is profoundly disproportionate. A number of variables have been shown to influence the academic achievement of students, such as stereotype threat, racial identity, and academic self-concept (Awad, 2007;…

  3. Gender Differences in Values and Their Impact on Academic Achievement.

    ERIC Educational Resources Information Center

    Inglehart, Marita Rosch; Brown, Donald R.

    Gender differences in academic achievement of students in the medical school at the University of Michigan were investigated in this study. Observed achievement differences were attributed to gender differences in values which influence student motivation. Three hypotheses were tested: (1) that men place more importance on mastery-related issues,…

  4. Juvenile Delinquency and Recidivism: The Impact of Academic Achievement

    ERIC Educational Resources Information Center

    Katsiyannis, Antonis; Ryan, Joseph B.; Zhang, Dalun; Spann, Anastasia

    2008-01-01

    For well over a century, behavioral researchers have attempted to understand the relation between juvenile delinquency and academic achievement. The authors review current literature pertaining to academic achievement and its effect on delinquency. While researchers have not yet been able to establish a direct causal relation between these two…

  5. Academic Achievement and Its Impact on Friend Dynamics

    ERIC Educational Resources Information Center

    Flashman, Jennifer

    2012-01-01

    Academic achievement in adolescence is a key determinant of future educational and occupational success. Friends play an important role in the educational process. They provide support and resources and can both encourage and discourage academic achievement. As a result, the friends adolescents make may help to maintain and exacerbate inequality…

  6. The Dynamics of Gender Impact on Group Achievement.

    ERIC Educational Resources Information Center

    Sormunen-Jones, Carolee; Chalupa, Marilyn R.; Charles, Thomas A.

    2000-01-01

    In cooperative learning groups of business students (n=38, 27, 28), half were self-selected, half were assigned. No differences in achievement were found across majors, gender, or membership choice. Groups with only one representative of a gender achieved significantly less than mixed or single-gender groups. (Contains 33 references.) (SK)

  7. Maximum Velocity of a Boulder Ejected From an Impact Crater Formed on a Regolith Covered Surface

    NASA Astrophysics Data System (ADS)

    Bart, G. D.; Melosh, H. J.

    2007-12-01

    We investigate the effect of regolith depth on boulder ejection velocity. A "boulder" refers to an apparently intact rock or rock fragment lying on a planetary surface, regardless of emplacement mechanism. Boulders appear in planetary images as positive relief features --- bright, sun-facing pixels adjacent to dark, shadowed pixels. We studied 12 lunar craters in high resolution (1~m) photographs from Lunar Orbiter III and V. Local regolith depth was measured using the method of small crater morphology. Ejection velocities of boulders were calculated assuming a ballistic trajectory to the final boulder location. A plot of regolith depth/crater diameter vs. maximum boulder ejection velocity shows that craters formed in deeper regolith (with respect to crater size) eject boulders at lower velocities. When ejection velocity (EjV) is in m/s, and regolith depth (Dr) and crater diameter (Dc) are in meters, the data fit the relation Dr / Dc = 1053 × EjVmax-2.823. To explain the data, we turn to impact cratering theory. An ejected particle will follow a streamline from its place of origin to its ejection point (the Z-model), and then follow a ballistic trajectory. Material ejected along more shallow streamlines is ejected at greater velocities. If shallow regolith covers the surface, the most shallow (greatest velocity) streamlines will travel only through the regolith. Boulders, however, must be ejected from the bedrock below the regolith. Thus, the boulder ejected with the greatest velocity originates just below the regolith, along the most shallow streamline through the bedrock. If the regolith is deeper, the most shallow streamline through the bedrock will be deeper, and the maximum velocity of an ejected boulder will be lower. Hence, the regolith depth and maximum ejection velocity of a boulder are correlated: greater boulder ejection velocities correspond to thinner regolith. We observe this correlation in the data.

  8. Vegetation greenness impacts on maximum and minimum temperatures in northeast Colorado

    USGS Publications Warehouse

    Hanamean, J. R.; Pielke, R.A.; Castro, C. L.; Ojima, D.S.; Reed, Bradley C.; Gao, Z.

    2003-01-01

    The impact of vegetation on the microclimate has not been adequately considered in the analysis of temperature forecasting and modelling. To fill part of this gap, the following study was undertaken.A daily 850–700 mb layer mean temperature, computed from the National Center for Environmental Prediction-National Center for Atmospheric Research (NCEP-NCAR) reanalysis, and satellite-derived greenness values, as defined by NDVI (Normalised Difference Vegetation Index), were correlated with surface maximum and minimum temperatures at six sites in northeast Colorado for the years 1989–98. The NDVI values, representing landscape greenness, act as a proxy for latent heat partitioning via transpiration. These sites encompass a wide array of environments, from irrigated-urban to short-grass prairie. The explained variance (r2 value) of surface maximum and minimum temperature by only the 850–700 mb layer mean temperature was subtracted from the corresponding explained variance by the 850–700 mb layer mean temperature and NDVI values. The subtraction shows that by including NDVI values in the analysis, the r2 values, and thus the degree of explanation of the surface temperatures, increase by a mean of 6% for the maxima and 8% for the minima over the period March–October. At most sites, there is a seasonal dependence in the explained variance of the maximum temperatures because of the seasonal cycle of plant growth and senescence. Between individual sites, the highest increase in explained variance occurred at the site with the least amount of anthropogenic influence. This work suggests the vegetation state needs to be included as a factor in surface temperature forecasting, numerical modeling, and climate change assessments.

  9. Limits imposed by solenoid damage on the maximum velocity achieved by an electromagnetic coilgun: A computational study

    NASA Astrophysics Data System (ADS)

    Madhavan, S.; Sijoy, C. D.; Pahari, S.; Chaturvedi, S.

    2012-06-01

    CAD has set up an electromagnetic acceleration and impact facility for studies of material fracture and deformation at high strain rates. The target is to reach projectile velocities of 200-500 m/s. The mechanical strength of the solenoid coil and potting material is an important factor affecting coil survival during experiments. We have performed a computational study, using the materials and coil and circuit parameters typically used in experiments, and found the operating limits up to which the coil can survive without breaking.

  10. The Impact of Linking Distinct Achievement Test Scores on the Interpretation of Student Growth in Achievement

    ERIC Educational Resources Information Center

    Airola, Denise Tobin

    2011-01-01

    Changes to state tests impact the ability of State Education Agencies (SEAs) to monitor change in performance over time. The purpose of this study was to evaluate the Standardized Performance Growth Index (PGIz), a proposed statistical model for measuring change in student and school performance, across transitions in tests. The PGIz is a…

  11. An Examination of an Online Tutoring Program's Impact on Low-Achieving Middle School Students' Mathematics Achievement

    ERIC Educational Resources Information Center

    Chappell, Shanan; Arnold, Pamela; Nunnery, John; Grant, Melva

    2015-01-01

    The purpose of this mixed methods study was to determine the impact of synchronous online tutoring services on struggling middle school students' mathematics achievement. The online tutoring was provided as a response to intervention (RTI) Tier 3 support (intensive, individualized intervention) in schools implementing a school-wide mathematics…

  12. How Rural School Superintendents in Illinois Impact Student Achievement

    ERIC Educational Resources Information Center

    VonSchnase, Kyle T.

    2010-01-01

    Since the passage of The No Child Left Behind Act of 2001, a superintendent's role has been redefined and more focus has been placed on student achievement. Research demonstrates that rural public schools are faced with an educational crisis. Rural districts are faced with an epidemic of declining enrollments/budgets, increased drop-out rates, low…

  13. Suitability of AIOU Television and Its Impact on Students' Achievements

    ERIC Educational Resources Information Center

    Siraj, Syed Abdul

    2008-01-01

    The requirement of television for educational purposes arises when specific educational objectives are not achieved through traditional way of teaching. There are a number of things television can do better than the average teacher and traditional educational institutions, but situations where both teacher and educational institutions are not…

  14. How Does Grit Impact College Students' Academic Achievement in Science?

    ERIC Educational Resources Information Center

    Bazelais, Paul; Lemay, David John; Doleck, Tenzin

    2016-01-01

    Research has suggested that achievement is not solely based on the cognitive abilities of the learner, but rather on the combination of cognitive ability and personality traits. This paper explores how grit affects student academic performance and success in first-year college physics students in the context of a Quebec Collège d'enseignement…

  15. The Impact of "Achievement for All" on School Leadership

    ERIC Educational Resources Information Center

    Blandford, Sonia

    2013-01-01

    The "Achievement for All" (AfA) pilot initiative, delivered in partnership by the Department for Education (DfE), (formerly the Department for Children, Schools and Families [DCSF]), National Strategies and the National College (NCSL), aims to increase the attainment and progress of children in schools with special educational needs and…

  16. Promoting Achievement in School through Sports. First Year Impact Study.

    ERIC Educational Resources Information Center

    American Sports Inst., Mill Valley, CA.

    Promoting Achievement in School through Sports (PASS) is an academic high school curriculum developed by the American Sports Institute. It is a daily, year-long, credit-bearing, physical education elective for students who love sports but are not performing up to their academic potential. PASS is based on the concept that the principles and skills…

  17. A Professional Learning Community's Impact on Academic Achievement

    ERIC Educational Resources Information Center

    Ransom, Minnie

    2016-01-01

    English language learners (ELL students) were not attaining and maintaining sufficient proficiency at public schools in Northern California, as measured by students' achievement scores on state and district assessments. The purpose of this quasi-experimental research was to determine whether there were differences in academic language arts…

  18. Impact of Reading Strategy Use on Girls' and Boys' Achievement

    ERIC Educational Resources Information Center

    Bouchamma, Yamina; Poulin, Vincent; Ruel, Catherine

    2014-01-01

    We examined the reading strategies of boys and girls and identified those determining academic achievement in 13-year-old Canadian students. Students from each province and one territory (N = 20,094) answered a questionnaire on, among others, reading strategies. T-test results showed that girls use these strategies more regularly compared to boys.…

  19. Impact of School Autonomy on Student Achievement: Cases from Australia

    ERIC Educational Resources Information Center

    Caldwell, Brian John

    2016-01-01

    Purpose: The purpose of this paper is to report four case studies in Australia that respond to the question: "How have schools with a relatively high degree of autonomy used their increased authority and responsibility to make decisions that have led in explicit cause-and-effect fashion to higher levels of student achievement"?…

  20. Student Access to Technology and Its Impact on Achievement

    ERIC Educational Resources Information Center

    Griffin, Jill

    2013-01-01

    One to One technology initiatives are a national trend, but something districts must weigh heavily as they are costly. The purpose of this study is to explore the One to One initiative in a middle school as it relates to student achievement and reducing economic disparity. Bourdieu's Cultural Capital Theory applies to this study as one would…

  1. Classroom, School, and District Impacts on Diverse Student Literacy Achievement

    ERIC Educational Resources Information Center

    Wilcox, Kristen Campbell; Lawson, Hal A.; Angelis, Janet

    2015-01-01

    Background/Context: Prior research has investigated the literacy achievement gap with particular focus on ethnically and linguistically diverse students' performance. This study extends that research by examining the relationships among classroom instructional practices, school priorities, and district policies in higher performing schools.…

  2. The Impact of Locus of Control on Language Achievement

    ERIC Educational Resources Information Center

    Nodoushan, Mohammad Ali Salmani

    2012-01-01

    This study hypothesized that students' loci of control affected their language achievement. 198 (N = 198) EFL students took the Rotter's (1966) locus of control test and were classified as locus-internal (ni = 78), and locus-external (ne = 120). They then took their ordinary courses and at the end of the semester, they were given their exams.…

  3. Impacts of Campus Involvement on Hospitality Student Achievement and Satisfaction

    ERIC Educational Resources Information Center

    Yin, Dean; Lei, Simon A.

    2007-01-01

    Campus involvement affecting satisfaction and academic achievement (overall grade point average) of hospitality undergraduate students at a state university in the Midwest (University X) was investigated through a survey research. A four-part survey instrument was developed to facilitate this study. There were a number of academic, professional,…

  4. The Sibling Size Impact on the Educational Achievement in France

    ERIC Educational Resources Information Center

    Adli, Rhonya; Louichi, Ahmed; Tamouh, Nadia

    2010-01-01

    We examine the impact of sibling size on children's education. The theoretical framework shows an opposite relationship between the number of children within family and their school performance. Empirical works diverge between those corroborating this theory and those leading to ambiguous results such a positive correlation or the absence of any…

  5. The Impact of Interactive Engagement Methods on Students' Academic Achievement

    ERIC Educational Resources Information Center

    Tlhoaele, Malefyane; Hofman, Adriaan; Winnips, Koos; Beetsma, Yta

    2014-01-01

    Interactive engagement (IE) is a process that promotes students' conceptual understanding through activities, combined with immediate feedback from peers and/or instructors. The present study investigates the impact of IE on students' academic performance, using the comprehensive model of educational effectiveness. Engineering students (n?=?158),…

  6. Impact of Maximum Allowable Cost on CO2 Storage Capacity in Saline Formations.

    PubMed

    Mathias, Simon A; Gluyas, Jon G; Goldthorpe, Ward H; Mackay, Eric J

    2015-11-17

    Injecting CO2 into deep saline formations represents an important component of many greenhouse-gas-reduction strategies for the future. A number of authors have posed concern over the thousands of injection wells likely to be needed. However, a more important criterion than the number of wells is whether the total cost of storing the CO2 is market-bearable. Previous studies have sought to determine the number of injection wells required to achieve a specified storage target. Here an alternative methodology is presented whereby we specify a maximum allowable cost (MAC) per ton of CO2 stored, a priori, and determine the corresponding potential operational storage capacity. The methodology takes advantage of an analytical solution for pressure build-up during CO2 injection into a cylindrical saline formation, accounting for two-phase flow, brine evaporation, and salt precipitation around the injection well. The methodology is applied to 375 saline formations from the U.K. Continental Shelf. Parameter uncertainty is propagated using Monte Carlo simulation with 10 000 realizations for each formation. The results show that MAC affects both the magnitude and spatial distribution of potential operational storage capacity on a national scale. Different storage prospects can appear more or less attractive depending on the MAC scenario considered. It is also shown that, under high well-injection rate scenarios with relatively low cost, there is adequate operational storage capacity for the equivalent of 40 years of U.K. CO2 emissions.

  7. Impact and Mitigation of Multiantenna Analog Front-End Mismatch in Transmit Maximum Ratio Combining

    NASA Astrophysics Data System (ADS)

    Liu, Jian; Khaled, Nadia; Petré, Frederik; Bourdoux, André; Barel, Alain

    2006-12-01

    Transmit maximum ratio combining (MRC) allows to extend the range of wireless local area networks (WLANs) by exploiting spatial diversity and array gains. These gains, however, depend on the availability of the channel state information (CSI). In this perspective, an open-loop approach in time-division-duplex (TDD) systems relies on channel reciprocity between up- and downlink to acquire the CSI. Although the propagation channel can be assumed to be reciprocal, the radio-frequency (RF) transceivers may exhibit amplitude and phase mismatches between the up- and downlink. In this contribution, we present a statistical analysis to assess the impact of these mismatches on the performance of transmit-MRC. Furthermore, we propose a novel mixed-signal calibration scheme to mitigate these mismatches, which allows to reduce the implementation loss to as little as a few tenths of a dB. Finally, we also demonstrate the feasibility of the proposed calibration scheme in a real-time wireless MIMO-OFDM prototyping platform.

  8. Barge Train Maximum Impact Forces Using Limit States for the Lashings Between Barges

    DTIC Science & Technology

    2005-03-01

    Figure 2-67. Maximum FW for a 2x2 Barge Train System - Case LWB .......................... 69 Figure 2-68. Maximum FW for a 2x3 Barge Train System...Case LWB .......................... 70 Figure 2-69. Maximum FW for a 3x2 Barge Train System - Case LWB .......................... 70 Figure 2-70. Maximum...FW for a 3x3 Barge Train System - Case LWB .......................... 71 Figure 2-71. Maximum FW for a 3x4 Barge Train System - Case LWB

  9. The Impact of Pupil Mobility on Assessment of Achievement and Its Implications for Program Planning.

    ERIC Educational Resources Information Center

    Sewell, Carl; And Others

    This study examines the relationship between student mobility and achievement test results in predominately Black and Hispanic Community School District 17, Brooklyn, New York. The project is designed to assess the impact of mobility on pupil achievement and the interpretation of achievement data, as well as to map the pupil population mobility. A…

  10. A preliminary report on the study of the impact sites and particles of the solar maximum satellite thermal blanket

    NASA Technical Reports Server (NTRS)

    Zook, H. A.

    1985-01-01

    A preliminary study of the work on examination of the impact pits in, or penetrations through, the thermal blankets of the Solar Maximum Satellite is presented. The three largest pieces of the thermal blanket were optically scanned with a total surface area of about one half square meter. Over 1500 impact sites of all sizes, including 432 impacts larger than 40 microns in diameter, have been documented. Craters larger in diameter than about 100 microns found on the 75 micron thick Kapton first sheet of the main electronics box blanket are actually holes and constitute perforations through the blanket. A summary of the impact pit population that were found is given. The chemical study of these craters is only in the initial stages, with only about 250 chemical spectra of particles observed in or around impact pits or in the debris pattern being recorded.

  11. Exploring the Impacts of Accelerated Delivery on Student Learning, Achievement and Satisfaction

    ERIC Educational Resources Information Center

    Wilkins, Stephen; Martin, Susan; Walker, Ian

    2010-01-01

    This case study examines the impacts on student learning, achievement and satisfaction when year 13 (final year) students at a large UK sixth-form college take a GCE A level in one year instead of the usual two years. Data relating to the entry qualifications and final A level grades achieved by 879 students on both accelerated and non-accelerated…

  12. The Impact of Achievement Press on Student Success in Elementary Schools

    ERIC Educational Resources Information Center

    Smith, Page A.; Kearney, W. Sean

    2013-01-01

    Purpose: The purpose of this study is to examine the relative impact of achievement press on student success in elementary schools in the Southwestern USA. Design/methodology/approach: Data from individual teacher assessments and student achievement tests are collected and aggregated at the campus level. Hierarchical linear modeling is utilized to…

  13. The Impact of Graphing Calculators on Math Achievement: A Quantitative, Longevity Analysis

    ERIC Educational Resources Information Center

    Arbini, Corey

    2016-01-01

    This study examined the impact of high school students' graphing calculator usage on their math achievement over time. Achievement growth was measured using nationally-recognized standardized test scores from EXPLORE, PLAN, and ACT. Two groups of students were used in this study; one group had graphing calculators integrated beginning in…

  14. The Power of Perception: Mediating the Impact of Poverty on Student Achievement

    ERIC Educational Resources Information Center

    Dell'Angelo, Tabitha

    2016-01-01

    Race and class often marginalize students in impoverished urban neighborhoods, and this reality is evident in consistently low student achievement in many of the schools in these neighborhoods. This study examines how a teacher's sense of agency can help mediate the detrimental impact of poverty on student achievement. Teachers in a large…

  15. Impact of Socio-Emotional Adjustment on Academic Achievement of Adolescent Girls in Jammu and Kashmir

    ERIC Educational Resources Information Center

    Gul, Showkeen Bilal Ahmad

    2015-01-01

    The study examined the impact of socio-emotional adjustment on academic achievement of adolescent girls of Jammu and Kashmir. The purpose of the investigation was to study the relationship and effect of socio-emotional adjustment on academic achievement among adolescent girls. The descriptive survey research method was used for the study and the…

  16. Summer Study: A Two Part Investigation of the Impact of Exposure to Schooling on Achievement Growth.

    ERIC Educational Resources Information Center

    David, Jane Lisa

    This thesis is composed of two studies which look at the impact of exposure to schooling on achievement growth of children. Both use data from the National Follow Through Evaluation. The first study investigates the hypothesis that the difference in achievement growth between poor and non-poor children is greater during the summer months than…

  17. What Is the Impact of Full Access to Technology on the Achievement of the Hispanic Student?

    ERIC Educational Resources Information Center

    Carr, John E., Jr.

    2013-01-01

    The problem studied in this research was whether the impact of full access to technology both at home and in school would affect the achievement of Hispanic students. The purpose of this study was to examine the relationship between the access to technology and the achievement of the Hispanic students at a suburban middle school. What are the…

  18. Arts Achieve, Impacting Student Success in the Arts: Preliminary Findings after One Year of Implementation

    ERIC Educational Resources Information Center

    Mastrorilli, Tara M.; Harnett, Susanne; Zhu, Jing

    2014-01-01

    The "Arts Achieve: Impacting Student Success in the Arts" project involves a partnership between the New York City Department of Education (NYCDOE) and five of the city's premier arts organizations. "Arts Achieve" provides intensive and targeted professional development to arts teachers over a three-year period. The goal of the…

  19. Estimating the Impact of the Massachusetts English Immersion Law on Limited English Proficient Students' Reading Achievement

    ERIC Educational Resources Information Center

    Guo, Qian; Koretz, Daniel

    2013-01-01

    The large number of limited English proficient (LEP) children in U.S. schools and the uncertainty about the impact of bilingual education versus English immersion on their achievement warrant rigorous investigation of the effects of "English immersion laws." We estimated the impact of "Question 2", the Massachusetts English…

  20. Impact of the Inclusion of Students with Autism on the Academic Achievement of General Education Students

    ERIC Educational Resources Information Center

    Quinn, James P., Jr.

    2011-01-01

    The impact of inclusion on general education students has barely been mentioned in the professional literature. The purpose of this quantitative study was to examine impact of inclusion of students with autism spectrum disorder (ASD) and the academic achievement of the general education students in inclusive classes using an independent measures…

  1. The solar maximum satellite capture cell: Impact features and orbital debris and micrometeoritic projectile materials

    NASA Technical Reports Server (NTRS)

    Mckay, D. S.; Rietmeijer, F. J. M.; Schramm, L. S.; Barrett, R. A.; Zook, H. A.; Blanford, G. E.

    1986-01-01

    The physical properties of impact features observed in the Solar Max main electronics box (MEB) thermal blanket generally suggest an origin by hypervelocity impact. The chemistry of micrometeorite material suggests that a wide variety of projectile materials have survived impact with retention of varying degrees of pristinity. Impact features that contain only spacecraft paint particles are on average smaller than impact features caused by micrometeorite impacts. In case both types of materials co-occur, it is belevied that the impact feature, generally a penetration hole, was caused by a micrometeorite projectile. The typically smaller paint particles were able to penetrate though the hole in the first layer and deposit in the spray pattern on the second layer. It is suggested that paint particles have arrived with a wide range of velocities relative to the Solar Max satellite. Orbiting paint particles are an important fraction of materials in the near-Earth environment. In general, the data from the Solar Max studies are a good calibration for the design of capture cells to be flown in space and on board Space Station. The data also suggest that development of multiple layer capture cells in which the projectile may retain a large degree of pristinity is a feasible goal.

  2. Influence of the Metal Volume Fraction on the maximum deflection and impact load of GLARE plates subjected to low velocity impact

    NASA Astrophysics Data System (ADS)

    Bikakis, GSE; Savaidis, A.; Zalimidis, P.; Tsitos, S.

    2016-11-01

    Fiber-metal laminates are hybrid composite materials, consisting of alternating metal layers bonded to fiber-reinforced prepreg layers. GLARE (GLAss REinforced) belongs to this new family of materials. GLARE is the most successful fiber-metal laminate up to now and is currently being used for the construction of primary aerospace structures, such as the fuselage of the Airbus A380 air plane. Impact properties are very important in aerospace structures, since impact damage is caused by various sources, such as maintenance damage from dropped tools, collision between service cars or cargo and the structure, bird strikes and hail. The principal objective of this article is to evaluate the influence of the Metal Volume Fraction (MVF) on the low velocity impact response of GLARE fiber-metal laminates. Previously published differential equations of motion are employed for this purpose. The low velocity impact behavior of various circular GLARE plates is predicted and characteristic values of impact variables, which represent the impact phenomenon, are evaluated versus the corresponding MVF of the examined GLARE material grades. The considered GLARE plates are subjected to low velocity impact under identical impact conditions. A strong effect of the MVF on the maximum impact load and a significant effect on the maximum plate deflection of GLARE plates has been found.

  3. Circuit life versus bleeding risk: the impact of achieved activated partial thromboplastin time versus achieved filtration fraction.

    PubMed

    MacEwen, Clare; Watkinson, Peter; Winearls, Christopher

    2015-06-01

    Whilst prolonging hemofilter (circuit) life, heparin increases bleeding risk. The impact of achieved activated partial thromboplastin time (APTT) on circuit life and bleeding risk has not been assessed in a modern critically ill cohort. Lowering filtration fraction may be an alternative means of prolonging circuit life, but is often overlooked in critical care. An observational study of 309 consecutive circuits in a general intensive care unit was conducted using a wide target APTT range. Multilevel modeling was used to predict circuit life and bleeding according to achieved APTT and filtration fraction. Independent predictors of circuit failure (i.e. unplanned ending of treatment) included filtration fraction (P<0.001, HR 1.07 per 1% increase), peak APTT (P<0.001, HR 0.8 per 10 s increase or 0.3 APTR increase) and baseline PT (P=0.014, HR 0.91 for every 50% increase). The only significant predictor of bleeding was peak APTT (P=0.017, OR 1.05 per 10 s increase). Every 10 s APTT increase was associated with a 20% reduction in circuit failure, but a 5% increase in hemorrhage. A 3% reduction in filtration fraction was associated with the same improvement in circuit life as a 10 s increase in APTT. Increasing APTT prolongs circuit life but carries a substantial risk of bleeding even in modern practice. Filtration fraction has a large impact on circuit life in the critically ill: a 3% reduction in filtration fraction, e.g. by increasing blood flow or delivering some of the clearance via dialysis, would be expected to reduce circuit failure as much as a 10 s increase in APTT.

  4. Wetting state and maximum spreading factor of microdroplets impacting on superhydrophobic textured surfaces with anisotropic arrays of pillars

    NASA Astrophysics Data System (ADS)

    Kwon, Dae Hee; Huh, Hyung Kyu; Lee, Sang Joon

    2013-07-01

    The dynamic behaviors of microdroplets that impact on textured surfaces with various patterns of microscale pillars are experimentally investigated in this study. A piezoelectric inkjet is used to generate the microdroplets that have a diameter of less than 46 μm and a controlled Weber number. The impact and spreading dynamics of an individual droplet are captured by using a high-speed imaging system. The anisotropic and directional wettability and the wetting states on the textured surfaces with anisotropically arranged pillars are revealed for the first time in this study. The impalement transition from the Cassie-Baxter state to the partially impaled state is evaluated by balancing the wetting pressure P wet and the capillary pressure P C even on the anisotropic textured surfaces. The maximum spreading factor is measured and compared with the theoretical prediction to elucidate the wettability of the textured surfaces. For a given Weber number, the maximum spreading factor decreases as the texture area fraction of the textured surface decreases. In addition, the maximum spreading factors along the direction of longer inter-pillar spacing always have smaller values than those along the direction of shorter inter-pillar spacing when a droplet impacts on the anisotropic arrays of pillars.

  5. Chicxulub Impact, Yucatan Carbonate Platform, Cretaceous-Paleogene Boundary and Paleocene-Eocene Thermal Maximum

    NASA Astrophysics Data System (ADS)

    Fucugauchi, J. U.; Perez-Cruz, L. L.

    2015-12-01

    Chicxulub formed 66 Ma ago by an asteroid impact on the Yucatan carbonate platform, southern Gulf of Mexico. Impact produced a 200 km diameter crater, platform fracturing, deformation and ejecta emplacement. Carbonate sedimentation restarted and crater was covered by up to 1 km of sediments. Drilling programs have sampled the Paleogene sediments, which record the changing sedimentation processes in the impact basin and platform. Here, results of a study of the Paleocene-Eocene sediments cored in the Santa Elena borehole are used to characterize the K/Pg and PETM. The borehole reached a depth of 504 m and was continuously cored, sampling the post-impact sediments and impact breccias, with contact at 332 m. For this study, we analyzed the section from ~230 to ~340 m, corresponding to the upper breccias and Paleocene-Eocene sediments. The lithological column, constructed from macroscopic and thin-section petrographic analyses, is composed of limestones and dolomitized limestones with several thin clay layers. Breccias are melt and basement clast rich, described as a suevitic unit. Section is further investigated using paleomagnetic, rock magnetic, X-ray fluorescence geochemical and stable isotope analyses. Magnetic polarities define a sequence of reverse to normal, which correlate to the geomagnetic polarity time scale from chrons 29r to 26r. The d13 C values in the first 20 m interval range from 1.2 to 3.5 %0 and d18 O values range from -1.4 to -4.8 %0. Isotope values show variation trends that correlate with the marine carbon and oxygen isotope patterns for the K-Pg boundary and early Paleocene. Positive carbon isotopes suggest relatively high productivity, with apparent recovery following the K-Pg extinction event. Geochemical data define characteristic trends, with Si decreasing gradually from high values in the suevites, low contents in Paleocene sediments with intervals of higher variability and then increased values likely marking the PETM. Variation trends are

  6. Systematic approach to determination of maximum achievable capture capacity via leaching and carbonation processes for alkaline steelmaking wastes in a rotating packed bed.

    PubMed

    Pan, Shu-Yuan; Chiang, Pen-Chi; Chen, Yi-Hung; Chen, Chun-Da; Lin, Hsun-Yu; Chang, E-E

    2013-01-01

    Accelerated carbonation of basic oxygen furnace slag (BOFS) coupled with cold-rolling wastewater (CRW) was performed in a rotating packed bed (RPB) as a promising process for both CO2 fixation and wastewater treatment. The maximum achievable capture capacity (MACC) via leaching and carbonation processes for BOFS in an RPB was systematically determined throughout this study. The leaching behavior of various metal ions from the BOFS into the CRW was investigated by a kinetic model. In addition, quantitative X-ray diffraction (QXRD) using the Rietveld method was carried out to determine the process chemistry of carbonation of BOFS with CRW in an RPB. According to the QXRD results, the major mineral phases reacting with CO2 in BOFS were Ca(OH)2, Ca2(HSiO4)(OH), CaSiO3, and Ca2Fe1.04Al0.986O5. Meanwhile, the carbonation product was identified as calcite according to the observations of SEM, XEDS, and mappings. Furthermore, the MACC of the lab-scale RPB process was determined by balancing the carbonation conversion and energy consumption. In that case, the overall energy consumption, including grinding, pumping, stirring, and rotating processes, was estimated to be 707 kWh/t-CO2. It was thus concluded that CO2 capture by accelerated carbonation of BOFS could be effectively and efficiently performed by coutilizing with CRW in an RPB.

  7. Impact of seed source power on dispersion-limited maximum reach in WDM-PONs using broadband light source seeded optical sources.

    PubMed

    Kim, Chul Han

    2012-02-13

    The maximum reach in a WDM-PON using a broadband light source (BLS) seeded optical source has been experimentally evaluated by taking into account both effects of dispersion-induced pulse broadening and excess intensity noise (EIN) increase. In order to investigate the impact of BLS seed source power on the dispersion-limited performance, the system's performance has been measured and compared as a function of the spectrum-sliced BLS seed power into a reflective semiconductor optical amplifier (RSOA). From the results, we confirmed that the maximum reach in a RSOA based WDM-PON was mainly degraded by the dispersion-induced EIN increase. Therefore, by mitigating the effect of dispersion-induced EIN increase with a high seed power into a RSOA, the maximum reach in the WDM-PON using a BLS seeded RSOA source could be achieved to be ~60 km of single-mode fiber at the spectrum-sliced BLS seed power of >-10 dBm and a 1.25 Gb/s signal without using any dispersion-compensating techniques.

  8. A case for a comet impact trigger for the Paleocene/Eocene thermal maximum and carbon isotope excursion

    NASA Astrophysics Data System (ADS)

    Kent, D. V.; Cramer, B. S.; Lanci, L.; Wang, D.; Wright, J. D.; Van der Voo, R.

    2003-06-01

    We hypothesize that the rapid onset of the carbon isotope excursion (CIE) at the Paleocene/Eocene boundary (˜55 Ma) may have resulted from the accretion of a significant amount of 12C-enriched carbon from the impact of a ˜10 km comet, an event that would also trigger greenhouse warming leading to the Paleocene/Eocene thermal maximum and, possibly, thermal dissociation of seafloor methane hydrate. Indirect evidence of an impact is the unusual abundance of magnetic nanoparticles in kaolinite-rich shelf sediments that closely coincide with the onset and nadir of the CIE at three drill sites on the Atlantic Coastal Plain. After considering various alternative mechanisms that could have produced the magnetic nanoparticle assemblage and by analogy with the reported detection of iron-rich nanophase material at the Cretaceous/Tertiary boundary, we suggest that the CIE occurrence was derived from an impact plume condensate. The sudden increase in kaolinite is thus thought to represent the redeposition on the marine shelf of a rapidly weathered impact ejecta dust blanket. Published reports of a small but significant iridium anomaly at or close to the Paleocene/Eocene boundary provide supportive evidence for an impact.

  9. Focusing National Institutes of Health HIV/AIDS research for maximum population impact.

    PubMed

    Walensky, Rochelle P; Auerbach, Judith D

    2015-03-15

    Progress in advancing research on the pathophysiology, prevention, treatment, and impact of human immunodeficiency virus (HIV) is threatened by the decaying purchasing power of National Institutes of Health (NIH) dollars. A working group of the NIH Office of AIDS Research Advisory Council was charged by the NIH Director with developing a focused and concise blueprint to guide the use of limited funding over the next few years. Science priorities outlined by the working group and reported here are intended to maximally address individuals, groups, and settings most affected by the epidemic, and to redress shortcomings in realizing population-level HIV prevention, treatment, and eradication goals. Optimizing these priorities requires that traditional silos--defined by topic focus and by scientific discipline--be dissolved and that structural issues affecting the pipeline of new investigators and the ability of the Office of AIDS Research to fulfill its role of steward of the NIH HIV/AIDS research program be directly addressed.

  10. Dinocyst taphonomy, impact craters, cyst ghosts, and the Paleocene-Eocene thermal maximum (PETM)

    USGS Publications Warehouse

    Edwards, Lucy E.

    2012-01-01

    Dinocysts recovered from sediments related to the Chesapeake Bay impact structure in Virginia and the earliest Eocene suboxic environment in Maryland show strange and intriguing details of preservation. Features such as curled processes, opaque debris, breakage, microborings and cyst ghosts, among others, invite speculation about catastrophic depositional processes, rapid burial and biological and chemical decay. Selected specimens from seven cores taken in the coastal plain of Virginia and Maryland show abnormal preservation features in various combinations that merit illustration, description, discussion and further study. Although the depositional environments described are extreme, many of the features discussed are known from, or could be found in, other environments. These environments will show both similarities to and differences from the extreme environments here.

  11. The impact of collective teacher efficacy on student achievement in high school science

    NASA Astrophysics Data System (ADS)

    Burcham, Mark W.

    This dissertation was designed to examine the impact of collective teacher efficacy on high school science achievement by looking at relationships among collective teacher efficacy, its two constructs, group competence and group task analysis, and high school science achievement scores at four rural high schools in Northwestern North Carolina. The researcher gathered historical test data from the testing coordinator from the school system and then administered the Collective Teacher Efficacy Instrument, developed by Goddard, Hoy, and Woolfolk Hoy (2000), to 24 science teachers from the four high schools. Using this information, the researcher conducted statistical analyses to determine the relationships among collective teacher efficacy, group competence, and group task analysis as compared with the tested science curriculum (physical science, biology, chemistry, and physics). The researcher also examined which construct was the most contributing factor and examined differences in efficacy levels and student achievement levels at each high school. Analysis of the data from this study indicated collective teacher efficacy, as well as its two constructs, group competence and group task analysis, does have a positive impact on student achievement in high school science. Analysis of the data revealed group competence is the major contributing factor for student achievement in biology and group task analysis is the major contributing factor for student achievement in physical science, chemistry, and physics. Further analysis of the data in this study, also revealed that the two high schools with the highest levels of collective teacher efficacy had the highest levels of student achievement.

  12. The Impact of Block Scheduling on Student Achievement, Attendance, and Discipline at the High School Level

    ERIC Educational Resources Information Center

    Williams, Charles, Jr.

    2011-01-01

    The purpose of this study was to determine the impact block scheduling has on (a) student academic achievement, discipline, and attendance, and (b) administrator, teacher, and student perceptions. The study compared 2005-2010 data from a high school utilizing the A/B block schedule and a high school under a traditional schedule, in one suburban…

  13. Factors Impacting Adult Learner Achievement in a Technology Certificate Program on Computer Networks

    ERIC Educational Resources Information Center

    Delialioglu, Omer; Cakir, Hasan; Bichelmeyer, Barbara A.; Dennis, Alan R.; Duffy, Thomas M.

    2010-01-01

    This study investigates the factors impacting the achievement of adult learners in a technology certificate program on computer networks. We studied 2442 participants in 256 institutions. The participants were older than age 18 and were enrolled in the Cisco Certified Network Associate (CCNA) technology training program as "non-degree" or…

  14. Investing in Educator Data Literacy Improves Student Achievement. Evidence of Impact: The Oregon Data Project

    ERIC Educational Resources Information Center

    Data Quality Campaign, 2012

    2012-01-01

    Since 2007 the Oregon DATA Project has been investing resources to provide educators on-the-job training around effective data use to improve student achievement. New evidence shows that their efforts are paying off. A 2011 Oregon DATA Project report detailed the impact of their investment in the state's educators, finding the following: (1)…

  15. Impact of Preschool Education on Reading Achievement of Kindergarten through Fifth Grade Students

    ERIC Educational Resources Information Center

    Clark, Melissa H.

    2009-01-01

    This study examines the impact of various types of preschool care and education on the reading achievement of children, kindergarten through fifth grade, who participated in the Early Childhood Longitudinal Study-Kindergarten Class of 1998-99 (ECLS-K). The participants in this study are located throughout the United States of America. These…

  16. The Impact of Music on Student Achievement in the Third and Fifth Grade Math Curriculum

    ERIC Educational Resources Information Center

    Albright, Ruth E.

    2012-01-01

    Research indicates students who engage in music exhibit improved cognitive development. The quantitative study was conducted in a large suburban school district in Southeast Georgia. This study investigated the impact of music on student achievement when music is incorporated with the core academic subject of mathematics at the elementary level.…

  17. The Impact of Eliminating Extraneous Sound and Light on Students' Achievement: An Empirical Study

    ERIC Educational Resources Information Center

    Mangipudy, Rajarajeswari

    2010-01-01

    The impact of eliminating extraneous sound and light on students' achievement was investigated under four conditions: Light and Sound controlled, Sound Only controlled, Light Only controlled and neither Light nor Sound controlled. Group, age and gender were the control variables. Four randomly selected groups of high school freshmen students with…

  18. The Impact of ICT on Pupils' Achievement and Attitudes in Social Studies

    ERIC Educational Resources Information Center

    Cener, Emin; Acun, Ismail; Demirhan, Gokhan

    2015-01-01

    The aim of this study is to investigate the impact of teaching social studies with the help of CT on pupils' achievement in social studies. A history, geography and culture oriented theme was selected from the social studies curriculum for the research, Turks on the Silk Road. A multimedia CD, documentaries, PowerPoint and so on were used to teach…

  19. The Impact of Indiana's System of Interim Assessments on Mathematics and Reading Achievement

    ERIC Educational Resources Information Center

    Konstantopoulos, Spyros; Miller, Shazia Rafiullah; van der Ploeg, Arie

    2013-01-01

    Interim assessments are increasingly common in U.S. schools. We use high-quality data from a large-scale school-level cluster randomized experiment to examine the impact of two well-known commercial interim assessment programs on mathematics and reading achievement in Indiana. Results indicate that the treatment effects are positive but not…

  20. The Impact of Troops to Teachers Participants on Student Achievement: A Causal-Comparative Study

    ERIC Educational Resources Information Center

    Osuch, Kurt Stanley

    2014-01-01

    The purpose of this causal-comparative study is to examine the impact of Troops to Teachers (TTT) participants on student achievement by comparing the mean scores of Texas students in the eighth grade during the 2011-2012 academic year taught by TTT participants with the mean scores of all other Texas eighth grade students on each of four…

  1. The Impact of Inclusion on the Academic Achievement of High School Special Education Students

    ERIC Educational Resources Information Center

    Dawkins, Harold Smith

    2010-01-01

    This dissertation examined the impact of inclusion on the academic achievement outcome of high school special education students as measured by English 1, biology, and algebra 1 as a function of gender, ethnicity, and years of inclusion. The study also examined the generalizations with confidence that could be made about the use of inclusion…

  2. The Impact of Federally Tax Exempt Property Ownership on National County Poverty Rank and Student Achievement

    ERIC Educational Resources Information Center

    Kuessner, Sonia Shedd

    2016-01-01

    Education in the 21st century is subject to standardized testing with financial implications associated with testing. Under continued focus at the federal level to close the socioeconomic achievement gap, equitable distribution of funding is critical to ensure all schools have resources available to offset impacts of low socioeconomic status on…

  3. The Immediate Impacts of Preschool Attendance on Turkish Children's Mathematics Achievement

    ERIC Educational Resources Information Center

    Aslan, Durmus; Aktas Arnas, Yasare

    2015-01-01

    This study was conducted to investigate the immediate impacts of preschool attendance on Turkish children's mathematics achievement. The participants were 200 children who attended or did not attend preschool. The number and operation task and the geometric shapes sorting task were used as the data collection tools. The children who attended…

  4. Investigating the Impact of Interactive Whiteboard Professional Development on Lesson Planning and Student Math Achievement

    ERIC Educational Resources Information Center

    Winkler, Rodney Lee

    2011-01-01

    K-12 teachers lack training in best practices of interactive lesson development. It is essential that teachers utilize interactive whiteboards effectively. Using a collaborative mentor training, this factorial between-within groups study investigated how student achievement was impacted when teachers applied a set of effective interactive…

  5. Impact of Discussion on Peer Evaluations: Perceptions of Low Achievement and Effort

    ERIC Educational Resources Information Center

    Huenecke, Todd M.; Waas, Gregory A.

    2011-01-01

    The authors placed 5th-grade students into small groups of 3 in order to examine the impact of group discussion and displayed effort on children's evaluations of a low-achieving peer. Low effort by a target peer resulted in negative evaluations across attributional, affective, help-giving, and social response dimensions. Children who participated…

  6. The Impact of Anonymous and Assigned Use of Student Response Systems on Student Achievement

    ERIC Educational Resources Information Center

    Poole, Dawn

    2012-01-01

    This study examined the impact of two approaches to use of student response systems (SRSs) on achievement in a study designed to better understand effective use of the devices. One condition was anonymous use of SRSs, in which graduate students selected a random clicker when entering the classroom. The second condition assigned devices to students…

  7. Online Penalty: The Impact of Online Instruction on the Latino-White Achievement Gap

    ERIC Educational Resources Information Center

    Kaupp, Ray

    2012-01-01

    Despite a substantial body of research on the effectiveness of distance education at the post-secondary level, little is known about the impact of online course delivery on the achievement gap. In California, the gap between white and Latino post-secondary student outcomes is significant and persistent, with Latino students overrepresented in…

  8. The Impact on Student Achievement Following Professional Development on the Principles of Formative Assessment

    ERIC Educational Resources Information Center

    DeNome, Evonne C.

    2015-01-01

    This quantitative study reviews the impact on student achievement following professional development on the principles of formative assessment. The study compared mathematics and reading performance data from student populations with teachers who received training in formative assessment to performance data from student populations with teachers…

  9. Measuring the Impact of Substance Abuse on Student Academic Achievement and Academic Growth

    ERIC Educational Resources Information Center

    Rattermann, Mary Jo

    2014-01-01

    This research presents data linking the impact of substance disorder to academic achievement, using data gathered at a recovery high school. Recovery schools provide recovery supports and a high-quality education to students with substance use disorders. The Global Appraisal of Individual Needs -- Short Screener and the Northwest Evaluation…

  10. The Impact of Regulations, Safety Considerations and Physical Limitations on Research Progress at Maximum Biocontainment

    PubMed Central

    Shurtleff, Amy C.; Garza, Nicole; Lackemeyer, Matthew; Carrion, Ricardo; Griffiths, Anthony; Patterson, Jean; Edwin, Samuel S.; Bavari, Sina

    2012-01-01

    We describe herein, limitations on research at biosafety level 4 (BSL-4) containment laboratories, with regard to biosecurity regulations, safety considerations, research space limitations, and physical constraints in executing experimental procedures. These limitations can severely impact the number of collaborations and size of research projects investigating microbial pathogens of biodefense concern. Acquisition, use, storage, and transfer of biological select agents and toxins (BSAT) are highly regulated due to their potential to pose a severe threat to public health and safety. All federal, state, city, and local regulations must be followed to obtain and maintain registration for the institution to conduct research involving BSAT. These include initial screening and continuous monitoring of personnel, controlled access to containment laboratories, accurate and current BSAT inventory records. Safety considerations are paramount in BSL-4 containment laboratories while considering the types of research tools, workflow and time required for conducting both in vivo and in vitro experiments in limited space. Required use of a positive-pressure encapsulating suit imposes tremendous physical limitations on the researcher. Successful mitigation of these constraints requires additional time, effort, good communication, and creative solutions. Test and evaluation of novel vaccines and therapeutics conducted under good laboratory practice (GLP) conditions for FDA approval are prioritized and frequently share the same physical space with important ongoing basic research studies. The possibilities and limitations of biomedical research involving microbial pathogens of biodefense concern in BSL-4 containment laboratories are explored in this review. PMID:23342380

  11. A model for the maximum credible hourly impact on any ground receptor from point sources with momentumdominated plume rise.

    PubMed

    Economopoulos, A P

    1992-05-01

    A pollutant dispersion model is developed, allowing rapid evaluation of the maximum credible one-hour-average concentration on any given ground-level receptor, along with the corresponding critical meteorological conditions (wind speed and stability class) for stacks with momentum-dominated plume rise in urban or rural areas under buoyancy or no buoyancy induced dispersion. Site-specific meteorological data are not required, as the computed concentrations are maximized against all credible combinations of wind speed, stability class, and mixing height.The analysis is based on the dispersion relations of Pasquill-Gifford and Briggs for rural and urban settings respectively, the buoyancy induced dispersion correlation of Pasquill, the wind profile exponent values suggested by Irwin, the momentum plume rise relations of Briggs, as well as the Benkley and Schulman's model for the minimum mixing heights.The model is particularly suited for air pollution management studies, as it allows fast screening of the maximum impact on any selected receptor and evaluation of the ways to have this impact reduced. Also, for regulatory purposes, as it allows accurate setting of minimum stack height requirements as function of the exit gas volume and velocity, the pollutant emission rates and their hourly concentration standards, as well as the source location relative to sensitive receptors.

  12. A model for the maximum credible hourly impact on any ground receptor from point sources with thermal plume rise.

    PubMed

    Economopoulos, A P

    1991-01-01

    A pollutant dispersion model is developed, allowing fast evaluation of the maximum credible 1-h average concentration on any given ground-level receptor, along with the corresponding critical meteorological conditions (wind speed and stability class) for stacks with buoyant plumes in urban or rural areas. Site-specific meteorological data are not required, as the computed concentrations are maximized against all credible combinations of wind speed, stability class, and mixing height. The analysis is based on the dispersion relations of Pasquill-Gifford and Briggs for rural and urban settings, respectively, the buoyancy induced dispersion correlation of Pasquill, the wind profile exponent values suggested by Irwin, the buoyant plume rise relations of Briggs, as well as the Benkley and Schulman's model for the minimum mixing heights. The model is particularly suited for air pollution management studies, as it allows fast screening of the maximum impact on any selected receptor and evaluation of the ways to have this impact reduced. It is also suited for regulatory purposes, as it can be used to define the minimum stack size requirements for a given source as a function of the exit gas volume and temperature, the pollutant emission rates and their hourly concentration standards, as well as the source location relative to sensitive receptors.

  13. The impact of environmental education on sixth-grade students' science achievement

    NASA Astrophysics Data System (ADS)

    Clavijo, Katherine Gillespie

    This study investigated the relationship between student involvement in environmental education (EE) and science achievement. The performance of students engaged in fifth and sixth grade classrooms identified as incorporating environmental education into science instruction was compared to that of students from similar classrooms that use traditional science instruction. Data from 4655 sixth grade students were analyzed using hierarchical multiple regression model to determine if environmental education improves prediction of science achievement beyond that afforded by differences in socioeconomic status and previous science achievement. The results indicated that environmental education, when integrated into science instruction, does not improve prediction of CTBS science scores beyond that afforded by differences in previous achievement in science and socioeconomic status. Previous achievement and socioeconomic status were the only two variables that predicted CTBS science subtest scores. The variable previous achievement (Score on fourth grade KIRIS test) explained 27.6% of the variance in CTBS test scores. The variable socioeconomic status (participation in free and reduced lunch program) explained 7.1% of the variance in CTBS science test scores. Participation in a fifth, sixth or both grades environmental education classroom did not add to the prediction of CTBS scores. This study illustrates that environmental education, while not correlated with high science achievement, does not correlate with low science achievement. Environmental education research may benefit from similar studies, which utilize alternative forms of student assessment. This study has implications for researchers interested in examining the impact of environmental education on science achievement, as it provides evidence for the importance of including background characteristics, such as socioeconomic status and previous achievement, in research models. This study provides an example of

  14. The Impact of Household Possessions on Youth's Academic Achievement in the Ghana YouthSave Experiment: A Propensity Score Analysis

    ERIC Educational Resources Information Center

    Chowa, Gina A. N.; Masa, Rainier D.; Wretman, Christopher J.; Ansong, David

    2013-01-01

    Household assets as part of youth's family background have been found to have a significant impact on youth's academic achievement. In this study, the impact of household possessions on youth's academic achievement in the Ghana YouthSave experiment is investigated. Findings support the hypothesized positive direction of the impact of household…

  15. Land Use Land Cover Impact on Probable Maximum Flood and Sedimentation for Artificial Reservoirs: A Case Study in Western US

    NASA Astrophysics Data System (ADS)

    Yigzaw, W. Y.; Hossain, F.

    2014-12-01

    Unanticipated peak inflows that can exceed the inflow design flood (IDF) for spillways and result in possible storage loss in reservoirs from increased sedimentation rates lead to a greater risk for downstream floods. Probable maximum precipitation (PMP) and probable maximum flood (PMF) are mostly used to determine IDF. Any possible change of PMP and PMF due to future land use and land cover (LULC) change therefore requires a methodical investigation. However, the consequential sediment yield, due to altered precipitation and flow patterns into the reservoir has not been addressed in literature. Thus, this study answers the following question: "What is the combined impact of a modified PMP on PMF and sediment yield for an artificial reservoir? The Owyhee dam of Owyhee River watershed (ORW) in Oregon is selected as a case study area for understanding the impact of LULC change on PMF and sedimentation rates. Variable Infiltration Capacity (VIC) is used for simulating stream flow (PMF) and the Revised Universal Soil Loss Equation (RUSLE) to estimate sediment yield over ORW as a result of change in precipitation intensity and LULC. Scenarios that represent pre-Owyhee dam (Pre-Dam) and post Owyhee dam (Non-Irrigation, Control, 1992, 2001, 2006) are used to simulate PMF's and consequential sediment yield. Peak PMF result for Pre-Dam scenarios is found to increase by 26m3s-1 (1%) and 81m3s-1 (3%) from Non-Irrigation and Control scenario, respectively. Considering only LULC change, sediment yield decreased over ORW due to the transformation of LULC from grassland to shrubland (from Pre-Dam period to the post-Dam years). However, increase in precipitation intensity caused a significant (0.1% storage loss over 21days storm period) increase in sediment yield resulting in largely reservoir sedimentation. This study underscores the need to consider future impact of LULC change on IDF calculation as well as sedimentation rates for more robust reservoir operations and planning.

  16. Impacts of CME on the TEC at middle and low latitudes during maximum of the 24th solar cycle

    NASA Astrophysics Data System (ADS)

    Migoya Orue, Yenca Olivia; Amory-Mazaudier, Christine; Radicella, Sandro; Nava, Bruno; Kashcheyev, Anton

    2015-04-01

    In this study we analyzed the impacts on the GNSS-derived Total Electron Content (TEC) of four selected CME hitting the Earth during the year 2013 at different stations of middle and low latitudes (Ebre, Rabat, Alexandria, San Fernando, M'barara, Matera and Dakar). In order to analyzed the seasonal behavior of TEC under these disturbed conditions in the mentioned stations we have selected four CME events occurred during the different seasons (January 19, March 17, July 9 and October 2) of year 2013, at a maximum of the sunspot cycle 24. At the beginning of each event there is an increase of TEC followed by a decrease. The first increase of TEC is a consequence of the Prompt Penetration of the Electric Field (PPEF). The depletion of the TEC is associated to the Disturbance Dynamo Electric Field (DDEF). In order to interpret the observations we analyzed the convection patterns at high latitudes given by the radar SUPERDARN. At low latitudes, we derived the ionospheric electric current disturbance Diono from ground magnetic variations. Diono is the sum of the DP2 (PPEF) and Ddyn (DDEF) electric current systems. Finally we found that the strength of the impact at middle and low latitudes depends on the time of the impact of the CME and the season.

  17. Offsetting the impacts of mining to achieve no net loss of native vegetation.

    PubMed

    Sonter, L J; Barrett, D J; Soares-Filho, B S

    2014-08-01

    Offsets are a novel conservation tool, yet using them to achieve no net loss of biodiversity is challenging. This is especially true when using conservation offsets (i.e., protected areas) because achieving no net loss requires avoiding equivalent loss. Our objective was to determine if offsetting the impacts of mining achieves no net loss of native vegetation in Brazil's largest iron mining region. We used a land-use change model to simulate deforestation by mining to 2020; developed a model to allocate conservation offsets to the landscape under 3 scenarios (baseline, no new offsets; current practice, like-for-like [by vegetation type] conservation offsetting near the impact site; and threat scenario, like-for-like conservation offsetting of highly threatened vegetation); and simulated nonmining deforestation to 2020 for each scenario to quantify avoided deforestation achieved with offsets. Mines cleared 3570 ha of native vegetation by 2020. Under a 1:4 offset ratio, mining companies would be required to conserve >14,200 ha of native vegetation, doubling the current extent of protected areas in the region. Allocating offsets under current practice avoided deforestation equivalent to 3% of that caused by mining, whereas allocating under the threat scenario avoided 9%. Current practice failed to achieve no net loss because offsets did not conserve threatened vegetation. Explicit allocation of offsets to threatened vegetation also failed because the most threatened vegetation was widely dispersed across the landscape, making conservation logistically difficult. To achieve no net loss with conservation offsets requires information on regional deforestation trajectories and the distribution of threatened vegetation. However, in some regions achieving no net loss through conservation may be impossible. In these cases, other offsetting activities, such as revegetation, will be required.

  18. Predicting maintenance or achievement of healthy weight in children: the impact of changes in physical fitness.

    PubMed

    Hruby, Adela; Chomitz, Virginia R; Arsenault, Lisa N; Must, Aviva; Economos, Christina D; McGowan, Robert J; Sacheck, Jennifer M

    2012-08-01

    Physical fitness is often inversely associated with adiposity in children cross-sectionally, but the effect of becoming fit or maintaining fitness over time on changes in weight status has not been well studied in children. We investigated the impact of changes in fitness over 1-4 years of follow-up on the maintenance or achievement of healthy weight among 2,793 schoolchildren who were first measured as 1st to 7th graders. Students were classified as "fit" or "underfit" according to age- and gender-specific norms in five fitness domains: endurance, agility, flexibility, upper body strength, and abdominal strength. Weight status was dichotomized by BMI percentile: "healthy weight" (<85th percentile) or "overweight/obese" (≥85th percentile). At baseline, of the 38.3% overweight/obese children, 81.9% (N = 875) were underfit. Underfit overweight students were more likely to achieve healthy weight if they achieved fitness (boys: odds ratio (OR) = 2.68, 95% confidence interval (CI) = 1.24-5.77; girls: OR = 4.67, 95%CI = 2.09-10.45). Initially fit overweight children (N = 194) were more likely to achieve healthy weight if they maintained fitness (boys: OR = 11.99, 95%CI = 2.18-65.89; girls: OR = 2.46, 95%CI = 1.04-5.83). Similarly, initially fit healthy-weight children (N = 717) were more likely to maintain healthy weight if they maintained fitness (boys: OR 3.70, 95%CI = 1.40-9.78; girls: OR = 4.14, 95%CI = 1.95-8.78). Overweight schoolchildren who achieve or maintain physical fitness are more likely to achieve healthy weight, and healthy-weight children who maintain fitness are more likely to maintain healthy weight. School-based policies/practices that support physical fitness may contribute to obesity reduction and maintenance of healthy weight among schoolchildren.

  19. The impact of single-gender classrooms on science achievement of middle school gifted girls

    NASA Astrophysics Data System (ADS)

    Ulkins, David S.

    Studies indicate a gap in science achievement and positive attitudes towards science between gifted male and female students with females performing less than the males. This study investigated the impact of a single-gender classroom environment as opposed to a mixed-gender classroom, on motivation, locus of control, self-concept, and science achievement of middle school gifted girls. The Motivated Strategies for Learning Questionnaire (MSLQ), Review of Personal Effectiveness with Locus of Control (ROPELOC), Test of Science Related Attitudes (TOSRA), and Stanford Achievement Test 10th Edition, were used to measure the dependent variables respectively. The independent-measure t test was used to compare the differences between girls in a single-gender classroom with the ones in a mixed-gender classroom. A significant difference in the external locus of control resulted for girls in the single gender classroom. However, there were no significant differences found in science achievement, motivation, and the attitudes toward science between the two groups. The implication is that a single-gender learning environment and the use of differentiated teaching strategies can help lessen the negative effects of societal stereotypes in today's classrooms. These, along with being cognizant of the differences in learning styles of girls and their male counterparts, will result in a greater level of success for gifted females in the area of science education.

  20. Impact of climate change on crop yield and role of model for achieving food security.

    PubMed

    Kumar, Manoj

    2016-08-01

    In recent times, several studies around the globe indicate that climatic changes are likely to impact the food production and poses serious challenge to food security. In the face of climate change, agricultural systems need to adapt measures for not only increasing food supply catering to the growing population worldwide with changing dietary patterns but also to negate the negative environmental impacts on the earth. Crop simulation models are the primary tools available to assess the potential consequences of climate change on crop production and informative adaptive strategies in agriculture risk management. In consideration with the important issue, this is an attempt to provide a review on the relationship between climate change impacts and crop production. It also emphasizes the role of crop simulation models in achieving food security. Significant progress has been made in understanding the potential consequences of environment-related temperature and precipitation effect on agricultural production during the last half century. Increased CO2 fertilization has enhanced the potential impacts of climate change, but its feasibility is still in doubt and debates among researchers. To assess the potential consequences of climate change on agriculture, different crop simulation models have been developed, to provide informative strategies to avoid risks and understand the physical and biological processes. Furthermore, they can help in crop improvement programmes by identifying appropriate future crop management practises and recognizing the traits having the greatest impact on yield. Nonetheless, climate change assessment through model is subjected to a range of uncertainties. The prediction uncertainty can be reduced by using multimodel, incorporating crop modelling with plant physiology, biochemistry and gene-based modelling. For devloping new model, there is a need to generate and compile high-quality field data for model testing. Therefore, assessment of

  1. Ecological Impact of Climate Change on Leaf Economic Strategies Across the Paleocene- Eocene Thermal Maximum, Bighorn Basin, Wyoming

    NASA Astrophysics Data System (ADS)

    Royer, D. L.; Currano, E. D.; Wilf, P.; Wing, S. L.; Labandeira, C. C.; Lovelock, E. C.

    2007-12-01

    Deciphering the ecological impacts of climate change is a key priority for paleontologists and ecologists alike. An important ecological metric in vegetated settings is the leaf economics spectrum, which represents an adaptive continuum running from rapid resource acquisition to maximized resource retention. This spectrum is comprised of a large number of coordinated traits, including leaf mass per area (LMA), leaf lifespan, photosynthetic rate, nutrient concentration, and palatability to herbivores. Here we apply a recently developed technique for reconstructing LMA to a suite of four isotaphonomic fossil plant sites spanning the Paleocene-Eocene thermal maximum (PETM) in the Bighorn Basin, Wyoming, USA. This technique is based on the biomechanical scaling between petiole width and leaf mass, and it has been calibrated with 65 present-day sites from five continents and tested on two well-known Eocene fossil localities (Bonanza, Utah and Republic, Washington). There are no significant differences in LMA among plants across the PETM. This stasis is present despite a backdrop of extreme climate change during the PETM in this region, including a three-to-four-fold increase in atmospheric CO2, an ~5 °C rise in temperature, and possible drying. Moreover, quantitative measurements of insect herbivory show, on average, a two-fold increase during the PETM relative to before and after the event. We interpret our results to suggest that leaf-economic relationships can, in some situations, partially decouple. More specifically, our documented increase in insect herbivory during the PETM with no concomitant decrease in LMA implies that during this interval less carbon was being captured by plants per unit of investment. Because the rate and magnitude of climate change during the PETM is similar to present-day anthropogenic changes, our results may provide clues for predictions of ecological impacts in the near future.

  2. On enforcing maximum principles and achieving element-wise species balance for advection-diffusion-reaction equations under the finite element method

    NASA Astrophysics Data System (ADS)

    Mudunuru, M. K.; Nakshatrala, K. B.

    2016-01-01

    We present a robust computational framework for advective-diffusive-reactive systems that satisfies maximum principles, the non-negative constraint, and element-wise species balance property. The proposed methodology is valid on general computational grids, can handle heterogeneous anisotropic media, and provides accurate numerical solutions even for very high Péclet numbers. The significant contribution of this paper is to incorporate advection (which makes the spatial part of the differential operator non-self-adjoint) into the non-negative computational framework, and overcome numerical challenges associated with advection. We employ low-order mixed finite element formulations based on least-squares formalism, and enforce explicit constraints on the discrete problem to meet the desired properties. The resulting constrained discrete problem belongs to convex quadratic programming for which a unique solution exists. Maximum principles and the non-negative constraint give rise to bound constraints while element-wise species balance gives rise to equality constraints. The resulting convex quadratic programming problems are solved using an interior-point algorithm. Several numerical results pertaining to advection-dominated problems are presented to illustrate the robustness, convergence, and the overall performance of the proposed computational framework.

  3. Maximum Jailbreak

    NASA Astrophysics Data System (ADS)

    Singleton, B.

    First formulated one hundred and fifty years ago by the heretical scholar Nikolai Federov, the doctrine of cosmism begins with an absolute refusal to treat the most basic factors conditioning life on Earth ­ gravity and death ­ as necessary constraints on action. As manifest through the intoxicated cheers of its early advocates that humans should storm the heavens and conquer death, cosmism's foundational gesture was to conceive of the earth as a trap. Its duty was therefore to understand the duty of philosophy, economics and design to be the creation of means to escape it. This could be regarded as a jailbreak at the maximum possible scale, a heist in which the human species could steal itself from the vault of the Earth. After several decades of relative disinterest new space ventures are inspiring scientific, technological and popular imaginations, this essay explores what kind of cosmism might be constructed today. In this paper cosmism's position as a means of escape is both reviewed and evaluated by reflecting on the potential of technology that actually can help us achieve its aims and also through the lens and state-ofthe-art philosophy of accelerationism, which seeks to outrun modern tropes by intensifying them.

  4. The Impact of Color-Coding Freshmen Integrated-Science Assignments on Student Achievement

    NASA Astrophysics Data System (ADS)

    Sturdivant Allen, Anita Kay

    Students in Grade 9 exhibit high rates of grade retention and absenteeism. Educators have used different strategies that will increase the achievement of those students. The purpose of this study was to determine whether a relationship existed between student achievement and the strategy to use colored paper for Grade 9 science assignments and tests. Itten's color theory provided the theoretical framework. Itten was one of the first researchers to explore the notion that the human eye can detect wavelengths as colors and that those colors can engage and create order in the human brain. A sample of students assigned to 4 classroom teachers at one high school who volunteered to take part in the study for 18 weeks were used in this quantitative study. Teachers administered student assessments on blue, green, yellow, and white paper. Each class was assigned 1 of the 4 colors for 4.5 weeks. The classes were then assigned a different color for the same length of time until each class had exposure to all 4 colors. Physical science exams given to students in the same grade or subject were used as the dependent variable. An ANOVA indicated that the groups using blue paper scored the highest on the physical science exams; students who used white paper earned the lowest scores. When comparing all 3 groups using colored paper (all three colored paper groups combined into one group) to the white paper groups, t-test results indicated that students using any colored paper scored higher than students using white paper. Further research on the impact of colored paper on student academic performance is necessary. Implications for positive social change indicate that new knowledge about instructional tools that impact student achievement deserves more attention.

  5. The impact of tutoring on early reading achievement for children with and without attention problems.

    PubMed

    Rabiner, David L; Malone, Patrick S

    2004-06-01

    This study examined whether the benefits of reading tutoring in first grade were moderated by children's level of attention problems. Participants were 581 children from the intervention and control samples of Fast Track, a longitudinal multisite investigation of the development and prevention of conduct problems. Standardized reading achievement measures were administered after kindergarten and 1st grade, and teacher ratings of attention problems were obtained during 1st grade. During 1st grade, intervention participants received three 30-min tutoring sessions per week to promote the development of initial reading skills. Results replicated prior findings that attention problems predict reduced 1st grade reading achievement, even after controlling for IQ and earlier reading ability. Intervention was associated with modest reading achievement benefits for inattentive children without early reading difficulties, and substantial benefits for children with early reading difficulties who were not inattentive. It had no discernible impact, however, for children who were both inattentive and poor early readers. Results underscore the need to develop effective academic interventions for inattentive children, particularly for those with co-occurring reading difficulties.

  6. How archer fish achieve a powerful impact: hydrodynamic instability of a pulsed jet in Toxotes jaculatrix.

    PubMed

    Vailati, Alberto; Zinnato, Luca; Cerbino, Roberto

    2012-01-01

    Archer fish knock down insects anchored to vegetation by hitting them with a precisely aimed jet of water. The striking force of the jet at the impact is such to overcome the strong anchoring forces of insects. The origin of the effectiveness of such hunting mechanism has been long searched for inside of the fish, in the unsuccessful attempt to identify internal structures dedicated to the amplification of muscular power. Here we perform a kinematic analysis of the jet emitted by two specimens of Toxotes jaculatrix. We estimate that at the impact the jet conveys a typical specific power of about 3000 W/kg, which is well above the maximum specific power of the order of 500 W/kg deliverable by a vertebrate muscle. Unexpectedly, we find that the amplification of muscular power occurs outside of the fish, and is due to a hydrodynamic instability of the jet akin to those occurring in Drop-on-Demand inkjet printing. The investigated fish are found to modulate the velocity of the jet at the orifice to favor the formation of a single, large, water drop that hits the prey abruptly with a large momentum. The observed mechanism represents a remarkable example of use of an external hydrodynamic lever that does possibly not entail the high evolutionary cost needed for the development of highly specialized internal structures dedicated to the storing of mechanical energy.

  7. How Archer Fish Achieve a Powerful Impact: Hydrodynamic Instability of a Pulsed Jet in Toxotes jaculatrix

    PubMed Central

    Vailati, Alberto; Zinnato, Luca; Cerbino, Roberto

    2012-01-01

    Archer fish knock down insects anchored to vegetation by hitting them with a precisely aimed jet of water. The striking force of the jet at the impact is such to overcome the strong anchoring forces of insects. The origin of the effectiveness of such hunting mechanism has been long searched for inside of the fish, in the unsuccessful attempt to identify internal structures dedicated to the amplification of muscular power. Here we perform a kinematic analysis of the jet emitted by two specimens of Toxotes jaculatrix. We estimate that at the impact the jet conveys a typical specific power of about 3000 W/kg, which is well above the maximum specific power of the order of 500 W/kg deliverable by a vertebrate muscle. Unexpectedly, we find that the amplification of muscular power occurs outside of the fish, and is due to a hydrodynamic instability of the jet akin to those occurring in Drop-on-Demand inkjet printing. The investigated fish are found to modulate the velocity of the jet at the orifice to favor the formation of a single, large, water drop that hits the prey abruptly with a large momentum. The observed mechanism represents a remarkable example of use of an external hydrodynamic lever that does possibly not entail the high evolutionary cost needed for the development of highly specialized internal structures dedicated to the storing of mechanical energy. PMID:23112861

  8. Cluster (School) RCT of ParentCorps: Impact on Kindergarten Academic Achievement

    PubMed Central

    Dawson-McClure, Spring; Calzada, Esther J.; Huang, Keng-Yen; Kamboukos, Dimitra; Palamar, Joseph J.; Petkova, Eva

    2013-01-01

    OBJECTIVE: To evaluate the impact of an early childhood, family-centered, school-based intervention on children’s kindergarten academic achievement. METHODS: This was a cluster (school) randomized controlled trial with assessments from pre-kindergarten (pre-k) entry through the end of kindergarten. The setting was 10 public elementary schools with 26 pre-k classes in 2 school districts in urban disadvantaged neighborhoods serving a largely black, low-income population. Participants were 1050 black and Latino, low-income children (age 4; 88% of pre-k population) enrolled in 10 schools over 4 years. Universal intervention aimed to promote self-regulation and early learning by strengthening positive behavior support and effective behavior management at home and school, and increasing parent involvement in education. Intervention included after-school group sessions for families of pre-k students (13 2-hour sessions; co-led by pre-k teachers) and professional development for pre-k and kindergarten teachers. The outcome measures were standardized test scores of kindergarten reading, writing, and math achievement by independent evaluators masked to intervention condition (primary outcome); developmental trajectories of teacher-rated academic performance from pre-k through kindergarten (secondary outcome). RESULTS: Relative to children in control schools, children in intervention schools had higher kindergarten achievement test scores (Cohen’s d = 0.18, mean difference = 2.64, SE = 0.90, P = .03) and higher teacher-rated academic performance (Cohen’s d = 0.25, mean difference = 5.65, SE = 2.34, P = .01). CONCLUSIONS: Early childhood population-level intervention that enhances both home and school environments shows promise to advance academic achievement among minority children from disadvantaged, urban neighborhoods. PMID:23589806

  9. The impact of an integrated math and science curriculum on third grade students' measurement achievement

    NASA Astrophysics Data System (ADS)

    Adamson, Karen

    The purpose of this study was to investigate the impact of a hands-on science curriculum, which integrates mathematics and supports the development of English language skills, on third grade students' mathematics achievement---specifically the measurement subscale of the statewide assessment. The data draws from a larger 5-year research project consisting of reform-based science curriculum units and teacher workshops designed to promote effective instruction of science while integrating mathematics and supporting English language development. The third grade curriculum places a strong emphasis on developing measurement skills in the context of scientific investigations. Third grade students' performance on the measurement subscale of the statewide mathematics assessment at experimental and comparison schools were examined using a hierarchical linear model (HLM). Students participating in the treatment performed significantly higher than students at comparison schools. The results of this study provide evidence that an integrated approach to math and science instruction can benefit diverse populations of students.

  10. Experimental study of the maximum resolution and packing density achievable in sintered and non-sintered binder-jet 3D printed steel microchannels

    SciTech Connect

    Elliott, Amy M; Mehdizadeh Momen, Ayyoub; Benedict, Michael; Kiggans Jr, James O

    2015-01-01

    Developing high resolution 3D printed metallic microchannels is a challenge especially when there is an essential need for high packing density of the primary material. While high packing density could be achieved by heating the structure to the sintering temperature, some heat sensitive applications require other strategies to improve the packing density of primary materials. In this study the goal is to develop high green or pack densities microchannels on the scale of 2-300 microns which have a robust mechanical structure. Binder-jet 3D printing is an additive manufacturing process in which droplets of binder are deposited via inkjet into a bed of powder. By repeatedly spreading thin layers of powder and depositing binder into the appropriate 2D profiles, complex 3D objects can be created one layer at time. Microchannels with features on the order of 500 microns were fabricated via binder jetting of steel powder and then sintered and/or infiltrated with a secondary material. The average particle size of the steel powder was varied along with the droplet volume of the inkjet-deposited binder. The resolution of the process, packing density of the primary material, the subsequent features sizes of the microchannels, and the overall microchannel quality were characterized as a function of particle size distribution, droplet sizes and heat treatment temperatures.

  11. Science homework with video directions for parents: The impact on parental involvement and academic achievement

    NASA Astrophysics Data System (ADS)

    Hooker, Kathy L.

    The benefits of effective parental involvement in education have been well documented and can be far reaching. When educators make an effort to involve families, parental involvement can be even more meaningful. Homework is a commonly practiced and accepted connection between school and home and affords parents many opportunities to interact with their children on educational endeavors. However, parental involvement may be limited because educators do not reach out to parents, parents feel their children do not need their help, or parents are unfamiliar with the content and therefore unable to help. The purpose of this study was too develop and implement a tool to enhance parental involvement and academic achievement of fourth grade science students. The tool used in this study was a weekly science video to be viewed by parents when it accompanied science homework assignments. To begin, the researcher created six science videos for parents to watch that supplemented weekly homework assignments. Consequently, the researcher set up treatment and comparison groups to test the effectiveness of the supplemental videos in terms of parental involvement and academic achievement. A mixed methods approach was used to collect data from parents and students throughout the study. A combination of quantitative and qualitative data was collected throughout this study from both parents and students. Additionally, data was collected from a variety of sources including baseline, midpoint, and endpoint surveys; scores on homework assignments; and focus group interview sessions with parents and students. Data analysis revealed an overall positive impact on parental involvement and academic achievement when the videos were utilized.

  12. The Impact of the Length of Preschool Attendance on the Academic Achievement and Retention of Third and Fourth Grade Students

    ERIC Educational Resources Information Center

    Brooks-Bey, Michelle Rubee

    2011-01-01

    The purpose of this study was to examine the impact of the length of years of preschool attendance on the academic achievement and retention of third and fourth grade students in high and low achieving schools. The study consisted of the analysis of secondary data, i.e., mathematics and language arts literacy scores as the measurement of academic…

  13. The Impact of Racial Identity and Consciousness Development on African American Female Academic Achievement: Implications for Counseling

    ERIC Educational Resources Information Center

    Glass, Charles R.

    2007-01-01

    The purpose of this study will be to examine the effect of racial identity/consciousness (RIC) on the academic achievement of African American female college freshmen. This causal-comparative study is intended to provide research based info ration concerning the impact of racial identity/consciousness development on the academic achievement of…

  14. Longitudinal Impacts of the Children's Literacy Initiative Professional Development, Coaching, and Model Classroom Intervention on Early Literacy Achievement

    ERIC Educational Resources Information Center

    Parkinson, Julia; Meakin, John; Salinger, Terry

    2015-01-01

    Student achievement in literacy has been a focal concern in the United States for many years. Improving teachers' knowledge and skill that leads to improved student achievement, particularly in the early grades, can place children on an improved trajectory that can have long-term impacts on life outcomes. Over the past decade, a large body of…

  15. The Impact of Student-Faculty Interaction on Academic Achievement and College Satisfaction for Black Males Attending Predominately White Institutions

    ERIC Educational Resources Information Center

    Hylton, Lamar R.

    2013-01-01

    The purpose of this study was to examine the impact of student-faculty interactions on academic achievement and college satisfaction among Black males at predominately White institutions. Specifically, the researcher sought to determine if there was a difference in levels of academic achievement and college satisfaction based on how often Black…

  16. The Impact of Motivation on Student's Academic Achievement and Learning Outcomes in Mathematics among Secondary School Students in Nigeria

    ERIC Educational Resources Information Center

    Tella, Adedeji

    2007-01-01

    In our match towards scientific and technological advancement, we need nothing short of good performance in mathematics at all levels of schooling. In an effort to achieve this, this study investigated the impact of motivation on students' school academic achievement in mathematics in secondary schools using motivation for academic preference…

  17. Achieving the HIV prevention impact of voluntary medical male circumcision: lessons and challenges for managing programs.

    PubMed

    Sgaier, Sema K; Reed, Jason B; Thomas, Anne; Njeuhmeli, Emmanuel

    2014-05-01

    Voluntary medical male circumcision (VMMC) is capable of reducing the risk of sexual transmission of HIV from females to males by approximately 60%. In 2007, the WHO and the Joint United Nations Programme on HIV/AIDS (UNAIDS) recommended making VMMC part of a comprehensive HIV prevention package in countries with a generalized HIV epidemic and low rates of male circumcision. Modeling studies undertaken in 2009-2011 estimated that circumcising 80% of adult males in 14 priority countries in Eastern and Southern Africa within five years, and sustaining coverage levels thereafter, could avert 3.4 million HIV infections within 15 years and save US$16.5 billion in treatment costs. In response, WHO/UNAIDS launched the Joint Strategic Action Framework for accelerating the scale-up of VMMC for HIV prevention in Southern and Eastern Africa, calling for 80% coverage of adult male circumcision by 2016. While VMMC programs have grown dramatically since inception, they appear unlikely to reach this goal. This review provides an overview of findings from the PLOS Collection "Voluntary Medical Male Circumcision for HIV Prevention: Improving Quality, Efficiency, Cost Effectiveness, and Demand for Services during an Accelerated Scale-up." The use of devices for VMMC is also explored. We propose emphasizing management solutions to help VMMC programs in the priority countries achieve the desired impact of averting the greatest possible number of HIV infections. Our recommendations include advocating for prioritization and funding of VMMC, increasing strategic targeting to achieve the goal of reducing HIV incidence, focusing on programmatic efficiency, exploring the role of new technologies, rethinking demand creation, strengthening data use for decision-making, improving governments' program management capacity, strategizing for sustainability, and maintaining a flexible scale-up strategy informed by a strong monitoring, learning, and evaluation platform.

  18. Impacts of Stratospheric Dynamics on Atmospheric Behavior from the Ground to Space Solar Minimum and Solar Maximum

    DTIC Science & Technology

    2015-12-15

    Constant solar and magnetospheric energy inputs are used so that day-to-day changes will arise only from lower atmospheric forcing. The simulated...from the ground to space solar minimum and solar maximum 5a. CONTRACT NUMBER BAA-76-11-01 5b. GRANT NUMBER N00173-12-1G010 5c. PROGRAM ELEMENT...atmospheric behavior from the ground to space under solar minimum and solar maximum conditions (Contract No.: N00173-12-1-G010 NRL) Project Summary

  19. Reducing the impact of snakebite envenoming in Latin America and the Caribbean: achievements and challenges ahead.

    PubMed

    Gutiérrez, José María

    2014-09-01

    Snakebite envenoming constitutes an important public health problem in Latin America and some countries of the Caribbean. The advances and pending tasks in the study and control of this neglected tropical disease in this region are reviewed in the light of a roadmap proposed in 2006. Significant progress has been achieved in the study of snake venoms, particularly regarding venom proteomics, i.e.'venomics', and the analysis of the mechanism of action of toxins. Likewise, a deeper understanding has been gained in the preclinical efficacy of antivenoms produced in the region. In contrast, despite advances made in the study of clinical manifestations of envenomings and safety and efficacy of antivenoms at the clinical level, much remains to be done in this subject. Improvements have occurred in antivenom manufacturing technologies and availability, although there are still countries where there is insufficient supply of antivenoms, or where manufacture has to be improved. In spite of considerable efforts in some countries in prevention, accessibility to treatment, and training of health staff in the management of envenomings, important challenges remain for the region as a whole, with the long term goal of reducing the impact of this disease in terms of personal and social suffering.

  20. Impact of learning orientation on African American children's attitudes toward high-achieving peers.

    PubMed

    Marryshow, Derrick; Hurley, Eric A; Allen, Brenda A; Tyler, Kenneth M; Boykin, A Wade

    2005-01-01

    This study examined Ogbu's widely accepted thesis that African American students reject high academic achievement because they perceive its limited utility in a world where their upward mobility is constrained by racial discrimination. Boykin's psychosocial integrity model contends that Black students value high achievement but that discrepancies between their formative cultural experiences and those imposed in school lead them to reject the modes of achievement available in classrooms. Ninety Black children completed a measure of attitudes toward students who achieve via mainstream or African American cultural values. Participants rejected the mainstream achievers and embraced the African American cultural achievers. Moreover, they expected their teachers to embrace the mainstream achievers and reject those who achieved through high-verve behavior. Results suggest that Boykin's thesis is a needed refinement to Ogbu's ideas. They indicate that Black children may reject not high achievement but some of the mainstream cultural values and behaviors on which success in mainstream classrooms is made contingent.

  1. Achieve Maximum Band Performance from Minimal Conditions.

    ERIC Educational Resources Information Center

    Rudgers, Gregory B.

    1984-01-01

    Suggestions are made to help music teachers with limited resources, such as a low budget, poor quality instruments, and small amounts of rehearsal time, develop a band that provides quality performance. Suggestions include properly maintaining student-model instruments and designing a lesson format for a private lesson and using it in group…

  2. Achieving Maximum Integration Utilizing Requirements Flow Down

    NASA Technical Reports Server (NTRS)

    Archiable, Wes; Askins, Bruce

    2011-01-01

    A robust and experienced systems engineering team is essential for a successful program. It is often a challenge to build a core systems engineering team early enough in a program to maximize integration and assure a common path for all supporting teams in a project. Ares I was no exception. During the planning of IVGVT, the team had many challenges including lack of: early identification of stakeholders, team training in NASA s system engineering practices, solid requirements flow down and a top down documentation strategy. The IVGVT team started test planning early in the program before the systems engineering framework had been matured due to an aggressive schedule. Therefore the IVGVT team increased their involvement in the Constellation systems engineering effort. Program level requirements were established that flowed down to IVGVT aligning all stakeholders to a common set of goals. The IVGVT team utilized the APPEL REQ Development Management course providing the team a NASA focused model to follow. The IVGVT team engaged directly with the model verification and validation process to assure that a solid set of requirements drove the need for the test event. The IVGVT team looked at the initial planning state, analyzed the current state and then produced recommendations for the ideal future state of a wide range of systems engineering functions and processes. Based on this analysis, the IVGVT team was able to produce a set of lessons learned and to provide suggestions for future programs or tests to use in their initial planning phase.

  3. The impact of classroom organization in grade 4 on student achievement in science

    NASA Astrophysics Data System (ADS)

    Duncanson, Edward Francis

    While qualitative studies of teacher perceptions of classroom organization have been performed, quantitative studies linked to standards-based assessments are noticeably absent. Two questions guided the research: What is the impact of classroom layout in grade 4 on student achievement in science? How does space use change in a classroom when the furniture is reorganized? The study was conducted in five classrooms in two rural, elementary schools. In two classrooms, teachers placed a large science materials table in the center of the room to make science activities a focal point for students. Two classrooms, that were used as controls, continued to operate using their established organization. The organization of the fifth classroom had included a large table in the center of the room for a number of years. This room was also used as a control. Data were collected in three ways. Quantitative data were collected from the New York State Grade-4 Science Program Evaluation Test. Qualitative data were collected using the Classroom Spatial Utilization and Migration Form and by creating a classroom map. The data were presented in quantitative, narrative, and graphic forms. Data from the New York State Grade-4 Science Program Evaluation Test were analyzed using a matrix published by the New York State Education Department and by using SPSS software. Classroom spatial utilization and migration patterns were visually evaluated. The guiding hypothesis that placing a large table in the center of the room would result in improved student performance was not totally supported by the data. Student density was correlated to student achievement. Specifically, classroom space per student was positively correlated to the inquiry science skills of classifying, manipulating materials, measuring, recording data, using non-standard measurement, and making predictions. Classroom arrangement was not as important as open space per student. This research is important because classrooms that

  4. The impact of podcasts, screencasts, and vodcasts on student achievement in the science classroom

    NASA Astrophysics Data System (ADS)

    Pena, Ruben, Jr.

    Educators in today's society are in search for different ways to reach their students in order to keep them engaged and active in the learning process. There are several strategies that teachers have utilized in the classroom in order to reach all students. Now seen more in the classroom is the use of technology in one form or another. There are several types of technologies that one may employ while in the classroom, but seen more recently is the use of podcasts, screencasts, and vodcasts. The major purpose of the study was to investigate the impact of using podcasts, screencasts, and vodcasts in conjunction with science curriculum on student academic achievement. Two intermediate schools from the south Texas region were chosen as a convenience sample for the study because one school utilized the technology of podcasts, screencasts, and vodcasts at the student created level while the other school did not utilize podcasts, screencasts, and vodcasts at the student created level. The researcher collected scores from curriculum based assessments that were aligned with the Texas Essential Knowledge and Skills (TEKS) for comparison between the two different groups, while controlling grade five science TAKS scores for group equalization. Once all data was collected, scores were entered into the Statistical Package for the Social Sciences (SPSS) and were analyzed using an analysis of covariance. The ANCOVA allowed the researcher to see that differences among curriculum based assessments scores existed between the two different schools. Scores were higher for the students who utilized podcasts, screencasts, and vodcasts at the student created level when compared to those scores for students who did not utilize podcasts, screencasts, and vodcasts at the student created level. This study showed the benefits reaped of having students create their own podcasts, screencasts, and vodcasts. Having students create their own technology has them actively engaged in the learning

  5. Practically Perfect in Every Way: Can Reframing Perfectionism for High-Achieving Undergraduates Impact Academic Resilience?

    ERIC Educational Resources Information Center

    Dickinson, Mary J.; Dickinson, David A. G.

    2015-01-01

    This study focuses on a pan-disciplinary scheme that targeted high-achieving undergraduate students. Earlier research from the scheme argued that high achievers have discernibly different learning and personal development support needs. One of the most frequent self-reported challenges within this high-achieving group is perfectionism. This…

  6. The Impact of Structured Note Taking Strategies on Math Achievement of Middle School Students

    ERIC Educational Resources Information Center

    Wilkinson, Gregory Ashley

    2012-01-01

    Student math achievement continues to be a national, state, and local concern. Research suggests that note taking can improve academic achievement, but current research has failed to report how low achievers might benefit from using note taking during math classes. The purpose of this study was to determine if teaching students structured note…

  7. Evaluating Math Recovery: Assessing the Causal Impact of Math Recovery on Student Achievement

    ERIC Educational Resources Information Center

    Smith, Thomas; Cobb, Paul; Farran, Dale; Cordray, David; Munter, Charles; Dunn, Alfred

    2010-01-01

    The authors' goal was to evaluate the potential of Math Recovery (MR), a pullout, one-to-one tutoring program that has been designed to increase mathematics achievement among low-performing first graders, thereby closing the school-entry achievement gap and enabling participants to achieve at the level of their higher-performing peers in the…

  8. Modeling the impact of the indigenous microbial population on the maximum population density of Salmonella on alfalfa.

    PubMed

    Rijgersberg, Hajo; Franz, Eelco; Nierop Groot, Masja; Tromp, Seth-Oscar

    2013-07-01

    Within a microbial risk assessment framework, modeling the maximum population density (MPD) of a pathogenic microorganism is important but often not considered. This paper describes a model predicting the MPD of Salmonella on alfalfa as a function of the initial contamination level, the total count of the indigenous microbial population, the maximum pathogen growth rate and the maximum population density of the indigenous microbial population. The model is parameterized by experimental data describing growth of Salmonella on sprouting alfalfa seeds at inoculum size, native microbial load and Pseudomonas fluorescens 2-79. The obtained model fits well to the experimental data, with standard errors less than ten percent of the fitted average values. The results show that the MPD of Salmonella is not only dictated by performance characteristics of Salmonella but depends on the characteristics of the indigenous microbial population like total number of cells and its growth rate. The model can improve the predictions of microbiological growth in quantitative microbial risk assessments. Using this model, the effects of preventive measures to reduce pathogenic load and a concurrent effect on the background population can be better evaluated. If competing microorganisms are more sensitive to a particular decontamination method, a pathogenic microorganism may grow faster and reach a higher level. More knowledge regarding the effect of the indigenous microbial population (size, diversity, composition) of food products on pathogen dynamics is needed in order to make adequate predictions of pathogen dynamics on various food products.

  9. Changing Minds: The Impact of College in a Maximum-Security Prison. Effects on Women in Prison, the Prison Environment, Reincarceration Rates and Post-Release Outcomes.

    ERIC Educational Resources Information Center

    Fine, Michelle; Torre, Maria Elena; Boudin, Kathy; Bowen, Iris; Clark, Judith; Hylton, Donna; Martinez, Migdalia; Missy; Roberts, Rosemarie A.; Smart, Pamela; Upegui, Debora

    The impact of college on women in a maximum-security prison was examined in a 3-year study of current and former inmates of New York's Bedford Hills Correctional Facility (BHCF). The data sources were as follows: (1) a review of program records; (2) one-on-one interviews of 65 inmates conducted by 15 inmates; (3) focus groups with 43 women in BHCF…

  10. Impacts of comprehensive reading instruction on diverse outcomes of low- and high-achieving readers.

    PubMed

    Guthrie, John T; McRae, Angela; Coddington, Cassandra S; Lutz Klauda, Susan; Wigfield, Allan; Barbosa, Pedro

    2009-01-01

    Low-achieving readers in Grade 5 often lack comprehension strategies, domain knowledge, word recognition skills, fluency, and motivation to read. Students with such multiple reading needs seem likely to benefit from instruction that supports each of these reading processes. The authors tested this expectation experimentally by comparing the effects of Concept-Oriented Reading Instruction (CORI) with traditional instruction (TI) on several outcomes in a 12-week intervention for low achievers and high achievers. Low achievers in the CORI group were afforded explicit instruction, leveled texts, and motivation support. Compared with TI students, CORI students scored higher on posttest measures of word recognition speed, reading comprehension on the Gates-MacGinitie Reading Test, and ecological knowledge. CORI was equally effective for lower achievers and higher achievers. Explicitly supporting multiple aspects of reading simultaneously appeared to benefit diverse learners on a range of reading outcomes.

  11. The Impact of a School Loaner-Instrument Program on the Attitudes and Achievement of Low-Income Music Students

    ERIC Educational Resources Information Center

    Ester, Don; Turner, Kristin

    2009-01-01

    The purpose of this study was to investigate the impact of a public school loaner-instrument program on the attitudes and achievement of low-income students in an urban environment. Socioeconomic Status (SES) and Instrument Status served as independent variables. Participants (N = 245) completed surveys at the beginning and end of the school year,…

  12. A Multilevel Modelling Approach to Investigating Factors Impacting Science Achievement for Secondary School Students: PISA Hong Kong Sample

    ERIC Educational Resources Information Center

    Sun, Letao; Bradley, Kelly D.; Akers, Kathryn

    2012-01-01

    This study utilized data from the 2006 Programme for International Student Assessment Hong Kong sample to investigate the factors that impact the science achievement of 15-year-old students. A multilevel model was used to examine the factors from both student and school perspectives. At the student level, the results indicated that male students,…

  13. High-Stakes Tests: Comparative Study Examining the Impact on the Achievement Gap that Causes Minority Students Continued Failure

    ERIC Educational Resources Information Center

    Taylor-Smith, Carol J.

    2011-01-01

    The purpose of this comparative qualitative study examined the impact of the achievement gap on the lack of highly qualified teachers instructing African American students consistently from K-12th grades and its effects on high-stakes testing. In addition, the study examined teacher perceptions that could also be contributing factors of the…

  14. The Impact of Teachers' Characteristics and Self-Reported Practices on Students' Algebra Achievement

    ERIC Educational Resources Information Center

    Cope, Liza M.

    2013-01-01

    This study examined the impact of teachers' characteristics and self-reported practices on students' Algebra achievement while controlling for students' characteristics. This study is based on the secondary analysis of data collected from a nationally representative sample of 9 th grade students and their mathematics teachers during…

  15. A Study on the Impact of Military Parent Deployment on Student Performance; Academic Achievement, Absenteeism, Discipline, and Counselor Visits

    ERIC Educational Resources Information Center

    Arnold, Hilda

    2013-01-01

    The purpose of the study was to determine if parents' military deployment had an impact on the academic achievement of their children. The study examined if there were a parallel between parental military deployment and absenteeism, parental deployment and discipline, and parental deployment and counselor visits. The study also examined if…

  16. The Perceptions of Principals and Teachers Regarding Mental Health Providers' Impact on Student Achievement in High Poverty Schools

    ERIC Educational Resources Information Center

    Perry, Teresa

    2012-01-01

    This study examined the perceptions of principals and teachers regarding mental health provider's impact on student achievement and behavior in high poverty schools using descriptive statistics, t-test, and two-way ANOVA. Respondents in this study shared similar views concerning principal and teacher satisfaction and levels of support for the…

  17. The Impact of School Climate on the Achievement of Elementary School Students Who Are Economically Disadvantaged a Quantitative Study

    ERIC Educational Resources Information Center

    Smallwood, Gina W.

    2014-01-01

    The purpose of this research was to explore the impact of school climate on the achievement of third and fourth grade students who are economically disadvantaged in Mathematics and Reading/Language Arts. Students' perception of school climate was studied using the "Tripod Survey" variables of a caring, captivating, and academically…

  18. Pilot Study: EatFit Impacts Sixth Graders' Academic Performance on Achievement of Mathematics and English Education Standards

    ERIC Educational Resources Information Center

    Shilts, Mical Kay; Lamp, Cathi; Horowitz, Marcel; Townsend, Marilyn S.

    2009-01-01

    Objective: Investigate the impact of a nutrition education program on student academic performance as measured by achievement of education standards. Design: Quasi-experimental crossover-controlled study. Setting: California Central Valley suburban elementary school (58% qualified for free or reduced-priced lunch). Participants: All sixth-grade…

  19. The Impact of Education Support Advisors on the Attendance, Discipline, and Achievement of At-Risk Students

    ERIC Educational Resources Information Center

    Townsend, Cathy J.

    2010-01-01

    This quantitative, causal-comparative study utilized ex post facto data to examine the impact of education support advisors (ESAs) on the discipline, attendance, and achievement of at-risk students in Grades 3-12. Fourteen education support advisors working in 16 elementary and 8 secondary schools of this mid-Atlantic school district consistently…

  20. An Africentric Rite of Passage Program and Its Impact on Adolescent African-American Male Attendance, Discipline, and Achievement

    ERIC Educational Resources Information Center

    Ford-Little, Monica

    2006-01-01

    The purpose of this study is to examine an Africentric rite of passage program's impact on African-American male high school students. It is intended to determine whether a rite of passage program will affect attendance, discipline and achievement. The study also investigates the development of a school-based Africentric program as well as its…

  1. The Impact of Interactive Environment and Metacognitive Support on Academic Achievement and Transactional Distance in Online Learning

    ERIC Educational Resources Information Center

    Yilmaz, Ramazan; Keser, Hafize

    2017-01-01

    The aim of the present study is to reveal the impact of the interactive environment and metacognitive support (MS) in online learning on academic achievement and transactional distance (TD). The study is designed as 2 × 2 factorial design, and both qualitative and quantitative research techniques are used. The study was carried out on 127…

  2. The Impact of Teacher Preparation on Academic Achievement of Eighth Grade Students in a South Texas School District

    ERIC Educational Resources Information Center

    Brinkman, Barbara Ann

    2014-01-01

    The purpose of the study was to examine the impact of a teacher's preparation program on the academic achievement of eighth grade students in the areas of mathematics, reading, science, and social studies. Prior to the implementation of the No Child Left Behind Act (NCLB) in 2001, the majority of classroom teachers earned their teaching…

  3. A University Engagement Model for Achieving Technology Adoption and Performance Improvement Impacts in Healthcare, Manufacturing, and Government

    ERIC Educational Resources Information Center

    McKinnis, David R.; Sloan, Mary Anne; Snow, L. David; Garimella, Suresh V.

    2014-01-01

    The Purdue Technical Assistance Program (TAP) offers a model of university engagement and service that is achieving technology adoption and performance improvement impacts in healthcare, manufacturing, government, and other sectors. The TAP model focuses on understanding and meeting the changing and challenging needs of those served, always…

  4. The Impact of Interactive Whiteboard Technology on Medical Students' Achievement in ESL Essay Writing: An Early Study in Egypt

    ERIC Educational Resources Information Center

    Albaaly, Emad; Higgins, Steven

    2012-01-01

    This study investigated the impact of the interactive whiteboard on Egyptian medical students' achievement in essay writing in English as a second language (ESL). First, the writing micro-skills judged essential to help these students improve their essay writing were identified, using a questionnaire which investigated experts' views. This gave…

  5. The Impact of the College Assistance Migrant Program on Migrant Student Academic Achievement in the California State University System

    ERIC Educational Resources Information Center

    Ramirez, Adrian D.

    2012-01-01

    The 7-year longitudinal study examined the College Assistance Migrant Program (CAMP) impact on migrant student achievement in the California State University system. Participants included migrant students, Latinos, and general student populations from 2002-2009. The analysis of variance and chi-square test of independence were used to explore…

  6. Kindergarten Entrance Age and Children's Achievement: Impacts of State Policies, Family Background, and Peers

    ERIC Educational Resources Information Center

    Elder, Todd E.; Lubotsky, Darren H.

    2009-01-01

    We present evidence that the positive relationship between kindergarten entrance age and school achievement primarily reflects skill accumulation prior to kindergarten, rather than a heightened ability to learn in school among older children. The association between achievement test scores and entrance age appears during the first months of…

  7. The Impact of Neighborhood Disadvantage on the Black-White Achievement Gap

    ERIC Educational Resources Information Center

    Lee, Moosung; Madyun, Na'im

    2009-01-01

    Contextual analysis of the achievement gap has gained much momentum within the last few decades. This study furthers the discourse by examining the applicability of 2 sociological contextual development approaches on achievement. We analyzed 79 neighborhoods organized by the level of crime and poverty from both a social disorganization and social…

  8. The Impact of the No Child Left Behind Act and School Choice on Student Achievement

    ERIC Educational Resources Information Center

    Pettett, Wendy Ruddell

    2012-01-01

    The No Child Left Behind (NCLB) act, signed into law in January 2002, established a decade of test-driven school reform in an attempt to increase student achievement and reduce the student achievement gap. The state of Georgia created the Criterion Reference Competency Test (CRCT) to align with the guidelines of NCLB. This study examined…

  9. Promoting Achievement in School through Sports: Second-Year Impact Study.

    ERIC Educational Resources Information Center

    American Sports Inst., Mill Valley, CA.

    Promoting Achievement in School through Sports (PASS) is an academic high school curriculum developed by the American Sports Institute for students who love sports but are not performing up to their academic potential. The program seeks to demonstrate that PASS is an effective intervention for promoting academic achievement and school success.…

  10. Schools in Violent Neighborhoods: The Impact on African American Elementary School Students' Academic Achievement

    ERIC Educational Resources Information Center

    Ingram, Brenda

    2013-01-01

    The academic achievement gap between African American and Caucasian students continues to be a major concern for policymakers and educators. This gap started to shrink in the 1970s and 1980s with integration, but the 1990s showed the achievement gap was on the rise again. The characteristics of the neighborhoods where children live and attend…

  11. The Impact of Achievement Goals on Cardiorespiratory Fitness: Does Self-Efficacy Make a Difference?

    ERIC Educational Resources Information Center

    Gao, Zan; Xiang, Ping; Lochbaum, Marc; Guan, Jianmin

    2013-01-01

    Purpose: The relationships among students' self-efficacy, 2 × 2 achievement goals (mastery-approach [MAp], mastery-avoidance [MAv], performance-approach [PAp], and performance-avoidance goals), and achievement performance remain largely unanswered. We tested a model of the mediating role of self-efficacy on the relationship between 2 × 2…

  12. The Impact of the Data Teams Process on Student Mathematics Achievement

    ERIC Educational Resources Information Center

    Walters, Mokysha Benford

    2012-01-01

    The purpose of this study is to determine the difference in the mathematics academic achievement of students when teachers engage in Data Teams, a continuous improvement process, and when they do not. Additionally, this study will examine differences in mathematics academic achievement of students by ethnicity, gender, and socio-economic status…

  13. Implementation of Comprehensive School Reform and Its Impact on Increases in Student Achievement

    ERIC Educational Resources Information Center

    Zhang, Yu; Fashola, Olatokunbo; Shkolnik, Jamie; Boyle, Andrea

    2006-01-01

    This study examined the relationship between the implementation of comprehensive school reform (CSR) and changes in reading and math achievement from 1999 until 2003. Survey data about CSR implementation and school-level achievement data were collected for multiple years from a sample of CSR schools and compared with a sample of matched comparison…

  14. Within Our Reach: A Study of Professional Community in Schools and Its Impact on Student Achievement

    ERIC Educational Resources Information Center

    Bell, Camille S.

    2010-01-01

    The primary purpose of this study was to examine the effects of professional learning community variables on student achievement in three Edison Learning Partnership Schools. The study examined three years of State School Assessment achievement data in reading and math, along with three years of Customer Satisfaction Data as collected by the…

  15. The Impact of Charter Schools on Promoting High Levels of Mathematics Achievement

    ERIC Educational Resources Information Center

    Plucker, Jonathan A.; Makel, Matthew C.; Rapp, Kelly E.

    2007-01-01

    This study compares achievement levels for high ability students attending charter schools and students in traditional public schools in Georgia. Researchers examined student achievement (as assessed by the state's Criterion-Referenced Competency Tests) using three comparison groups: students in the closest traditional schools with similar grade…

  16. Under the Radar: The Impact of Relatively Young Age for Grade Level on Academic Achievement

    ERIC Educational Resources Information Center

    Ryken, Klazina

    2012-01-01

    The purpose of this study was to determine whether age differences affect students' academic achievement, and whether age differences affect students in low-income areas differently than those in mixed or higher-income areas. Student achievement data for grades 3, 7, and 11 in language arts and math were obtained from a variety of schools located…

  17. The Impact of an Improvisational Dramatics Program on School Attitude and Achievement.

    ERIC Educational Resources Information Center

    Gourgey, Annette F.; And Others

    An improvisational dramatics program was developed to improve the reading achievement and school attitudes of disadvantaged elementary school children. The program, based on the rationale that encouraging self-awareness and creative self-expression will improve communication skills, reading achievement, and attitudes, was used with 141 fourth,…

  18. Impacts of climatic change on carbon storage in the Sahara?Gobi desert belt since the Last Glacial Maximum

    NASA Astrophysics Data System (ADS)

    Lioubimtseva, E.; Simon, B.; Faure, H.; Faure-Denard, L.; Adams, J. M.

    1998-05-01

    Reconstructions of palaeolandscapes for intervals with different climatic conditions help define regional trends in palaeobiomass and carbon storage due to global climatic change. The Sahara-Gobi desert belt stretches for about 15,000 km from the Atlantic coast to Northern China. Natural vegetation zones have undergone a number of significant shifts and complex qualitative changes under the contrasting climatic conditions of the Last Glacial Maximum (LGM) and the Holocene Climatic Optimum (HCO). The results presented here are based on palynological, pedological and sedimentological evidence, which indicate that the amount of carbon stored in vegetation and soils would have been much smaller during the Glacial Maximum than in the interglacial and post glacial times. Comparison of a set of palaeogeographic maps of this region for the chosen time-slices (ca. 20-18 ka, 9-8 ka and the present) allows us to discuss land biomass changes. Dry and cool conditions during the LGM resulted in the spread of arid and semi-arid ecosystems at northern and southern margins of the desert belt. The southern limit of the Sahara migrated southward at least 400 km relative to its present position, and almost 1000 km south compared to the mid-Holocene. The northern margin of the temperate deserts and dry steppes of Central Asia shifted northward for not less than 200-300 km over Kazakhstan, southern Siberia and Mongolia. In this study we have quantified variations of the main ecosystems from the LGM to the HCO in terms of changes in carbon storage. Each vegetation zone has been assigned a carbon density for living and dead (soil) organic matter. During the last world deglaciation, the Sahara-Gobi desert belt was a sink for approximately 200 Gt of atmospheric carbon, but since the mid-Holocene, it has been a source of carbon.

  19. A Penny and a Half and a Pool: Lead Poisoning and Its Impact on Academic Achievement

    ERIC Educational Resources Information Center

    Gehrman, Matthew Paul

    2011-01-01

    Lead is a neurotoxin that has been shown to have a long and lasting impact on the brains, bodies, and behaviors of those who are poisoned. It also has a greater presence in communities with high levels of poverty and minority populations. Compounded over time, the effects of lead poisoning, even at low levels of exposure, impact a child's…

  20. A Multilevel Modelling Approach to Investigating Factors Impacting Science Achievement for Secondary School Students: PISA Hong Kong Sample

    NASA Astrophysics Data System (ADS)

    Sun, Letao; Bradley, Kelly D.; Akers, Kathryn

    2012-09-01

    This study utilized data from the 2006 Programme for International Student Assessment Hong Kong sample to investigate the factors that impact the science achievement of 15-year-old students. A multilevel model was used to examine the factors from both student and school perspectives. At the student level, the results indicated that male students, students from high socioeconomic status (SES) families, students with higher motivation and higher self-efficacy, and students whose parents highly value science are more likely to demonstrate achievement in science. At the school level, the results showed school science achievement differences can be explained by school enrolment size, school SES composition, and instruction time per week. Contrary to the negative influence of school size that was reported in previous studies, our findings suggested a positive relationship between school enrolment size and science achievement. This finding leads to an international discussion of school size.

  1. The Impact of Group Processing On Achievement in Cooperative Learning Groups.

    DTIC Science & Technology

    1985-02-20

    using to achieve its outcome goals. The feedback gives students information that helps them inprove performance. And it reinforces students for...cooperative learning in which members disciissed how well their group was functioning and how they could improve its effectiveness, (b) cooperative learning ...achievement of (a) cooperative learning in which members discussed how well their group was functioning and how they could improve its .ffectiveness, (b

  2. Learning nanotechnology with texts and comics: the impacts on students of different achievement levels

    NASA Astrophysics Data System (ADS)

    Lin, Shu-Fen; Lin, Huann-shyang

    2016-05-01

    Comics are popular with adolescents because of their features of humor, narrative, and visual imagery. The purposes of this study were to examine the learning outcomes and emotional perceptions of reading a science comic book and a science text booklet for students of different levels of achievement, and to explore the main factors of the two media which attract high-school students to learn science. A mixed-method quasi-experimental design was adopted. The participants were 697 grade ten students from eight schools with different levels of academic achievement. Two similar classes in each of the eight schools were assigned as the comic group or the text group. The results indicated that the science comic book benefited medium achievers more than the science text booklet did, but the contrary result was found for the high achievers. In comparison, the two media benefited the low achievers equally, but both had only a limited effect due to the students' lack of prior knowledge. We conclude four kinds of evidence, including perceived difficulty of comprehension, reasons for interest/disinterest, emotional perceptions of learning science, and learning time, to support the phenomenon of the learning benefit of media specific to certain achievers' science learning.

  3. Analytical Modeling of Pressure Wall Hole Size and Maximum Tip-to-Tip Crack Length for Perforating Normal and Oblique Orbital Debris Impacts

    NASA Technical Reports Server (NTRS)

    Schonberg, William P.; Mohamed, Essam

    1997-01-01

    This report presents the results of a study whose objective was to develop first-principles-based models of hole size and maximum tip-to-tip crack length for a spacecraft module pressure wall that has been perforated in an orbital debris particle impact. The hole size and crack length models are developed by sequentially characterizing the phenomena comprising the orbital debris impact event, including the initial impact, the creation and motion of a debris cloud within the dual-wall system, the impact of the debris cloud on the pressure wall, the deformation of the pressure wall due to debris cloud impact loading prior to crack formation, pressure wall crack initiation, propagation, and arrest, and finally pressure wall deformation following crack initiation and growth. The model development has been accomplished through the application of elementary shock physics and thermodynamic theory, as well as the principles of mass, momentum, and energy conservation. The predictions of the model developed herein are compared against the predictions of empirically-based equations for hole diameters and maximum tip-to-tip crack length for three International Space Station wall configurations. The ISS wall systems considered are the baseline U.S. Lab Cylinder, the enhanced U.S. Lab Cylinder, and the U.S. Lab Endcone. The empirical predictor equations were derived from experimentally obtained hole diameters and crack length data. The original model predictions did not compare favorably with the experimental data, especially for cases in which pressure wall petalling did not occur. Several modifications were made to the original model to bring its predictions closer in line with the experimental results. Following the adjustment of several empirical constants, the predictions of the modified analytical model were in much closer agreement with the experimental results.

  4. Dynamic behavior of water droplet impact on microtextured surfaces: the effect of geometrical parameters on anisotropic wetting and the maximum spreading diameter.

    PubMed

    Li, Xiying; Mao, Liqun; Ma, Xuehu

    2013-01-29

    Textured silicon surfaces decorated by square arrays of pillars with adjustable pitch were fabricated. The wetting behavior, especially for direction-dependent water contact angles on textured silicon surfaces after silanization, was investigated by incorporating the contact line fraction into a modified Wenzel model. Also, the effect of geometrical parameters on the anisotropic wetting behavior of water was examined with respect to water droplet impact on the textured surface. Moreover, the maximum spreading factor was studied theoretically in terms of energy conservation, allowing for surface topography and viscous friction of the liquid flowing among the arrays of the posts. Theoretical models were found to be in good agreement with experimental data.

  5. An exploration of the impact of reform-based science instruction on second graders' academic achievement

    NASA Astrophysics Data System (ADS)

    Ellis, Valeisha Michelle

    The purpose of this study was to examine whether possible relationships might exist between the quality of reform-based science instruction and science and reading achievement in second grade. The study also examined separately possible interactions between quality of instruction and gender and race. The study involved an analysis of data previously collected in a larger one-group pre/post test study of a science instructional intervention (ISI Science) (Connor et al., 2010). In the original study, six teachers and two graduate assistants taught two science units designed based upon constructivist principles and reform-based practices. Using the 5-E Learning Cycle (Bybee, 1997), reading and science were integrated into each lesson. Videotapes were made of all lessons and science and reading achievement data were collected. For the current study, dependent achievement variables were science achievement measured by the Iowa Science Test; reading comprehension, by the Woodcock Passage Comprehension; and vocabulary, by the Iowa Vocabulary. Pre- and post-tests scores on the dependent measures were available for 96 children from the original study. Quality of instruction was measured using the Reformed Teaching Observation Protocol (RTOP) (Sawanda & Piburn, 2000). Videotapes of 24 science lessons from the larger study were analyzed using the RTOP. Reliability of ratings for the RTOP in the study was determined to be .96. No significant results were found for relations between instructional quality (RTOP) and any of the achievement variables although significant pre to post increases on all three measures were observed. No differences by race or gender were found. This latter finding was noteworthy given the research in science identifying both gender and race differences in science achievement. Recommendations for future research and teacher education are discussed.

  6. Sustained Silent Reading in Middle School and Its Impact on Students' Attitudes and Achievement

    ERIC Educational Resources Information Center

    Morgan, Margaret Peggy S.

    2013-01-01

    Sustained Silent Reading (SSR) is a period of time given to students to read self-selected materials during their school day. This study examines the effect of participation in a SSR program on reading attitudes and reading achievement of students as measured by the Adolescent Motivation to Read Profile (AMRP) and the Northwest Evaluation…

  7. The Impact of Reading Recovery on the Reading Achievement of First Grade Students

    ERIC Educational Resources Information Center

    Case, Marguerite

    2015-01-01

    There are so many different intervention programs for educators to use to increase the reading achievement of below grade level students, that it can often be difficult to choose the appropriate one for the students. Most programs are scripted and are used with small groups of students. Reading Recovery is not a scripted program and is taught in a…

  8. 75 FR 4788 - FY 2010 Grant Competition Announcement; Promoting Student Achievement at Schools Impacted by...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-29

    ... of the Secretary FY 2010 Grant Competition Announcement; Promoting Student Achievement at Schools...: Grant competition announcement; amendment. SUMMARY: The Department of Defense Education Activity (DoDEA... grant competition announcement, which published in the Federal Register on November 24, 2009 (74...

  9. Academic Achievement in Norwegian Secondary Schools: The Impact of Violence during Childhood

    ERIC Educational Resources Information Center

    Huang, Lihong; Mossige, Svein

    2012-01-01

    Using data from a national survey (N = 6,979) of young people in their last year in Norwegian secondary schools in 2007 (aged 18 and 19), this paper examines the effect of experience of violence including sexual abuse during childhood (before the age of 13) on the later academic achievement of young people. This investigation includes three types…

  10. The Impact of Fast ForWord on MCT Scores and Student Achievement

    ERIC Educational Resources Information Center

    Van Vinkle, Michael Harvey

    2009-01-01

    Educators today were concerned with how the No Child Left Behind Act of 2001 dealt with the improvement of education throughout the United States. Schools should have put forth a greater effort and reduced the achievement gap between different groups of students based on race, gender, special education status, and if that student was economically…

  11. The Impact of Professional Development on Literacy Achievement of Kindergarten Hispanic English Language Learners

    ERIC Educational Resources Information Center

    Fizer, Selena E.

    2009-01-01

    The number of English language learners (ELL) across public schools in the United States continues to rise (Brice & Roseberry-McKibbin, 2006). However, teacher preparation for these students is not growing (McKeon, 2005). This quantitative study explored the relationship between teacher professional development and literacy achievement of…

  12. Instructional Innovations: The Impact of Comprehensive School Reforms on Middle School Students' Achievement

    ERIC Educational Resources Information Center

    Mitchell, Senetha G.

    2011-01-01

    Many U.S. middle schools are beset with a multitude of problems that encompasses a lack of achievement, access to necessary resources, failure to make adequate yearly progress, and an inadequate supply of effective teachers. This is particularly alarming because social and intellectual capital have become the prevailing values of the 21st century.…

  13. The Impact of Home and School Collaboration on Student Achievement in K-5 Reading and Math

    ERIC Educational Resources Information Center

    Mobley, Joy L.

    2012-01-01

    Public schools struggle with ways to encourage parental involvement in the classroom. Home and school collaboration is needed if students are to succeed academically. The purpose of this study was to investigate whether there was a significant difference in the reading achievement of students by the number of workshop sessions attended by parents…

  14. National Board Certification: Impact on Student Achievement and Teacher Practices. Information Capsule. Volume 0917

    ERIC Educational Resources Information Center

    Blazer, Christie

    2010-01-01

    The combination of difficult economic times and increased accountability has led policymakers to call for evidence that students taught by National Board of Professional Teaching Standards (NBPTS)-certified teachers make greater achievement gains than those taught by non-NBPTS-certified teachers. Overall, studies show mixed results regarding the…

  15. Impact of Teacher Qualification on Student Achievement at the Elementary and Middle School Levels

    ERIC Educational Resources Information Center

    Andrews, Sandra L.

    2012-01-01

    Although the federal No Child Left Behind (NCLB) Act requires that classroom teachers be highly qualified, the assumption that achieving the highly qualified endorsement equates to teacher effectiveness in the classroom is unverified. The purpose of this study was to compare the effect of teacher qualification, as defined by the NCLB Act and…

  16. Examining the Impact of Leadership Style and School Climate on Student Achievement

    ERIC Educational Resources Information Center

    Robinson, Tina

    2010-01-01

    The purpose of this quantitative study was to investigate whether or not leadership style and school climate are significant predictors of student achievement. The target population consisted of elementary and high school teachers from Virginia public schools who had taught under the leadership of their respective current principals for at least 4…

  17. The Impact of Reading Recovery on Later Achievement in Reading and Writing

    ERIC Educational Resources Information Center

    Ruhe, Valerie; Paula, Moore

    2005-01-01

    Reading Recovery is a short-term intervention for first-grade children with reading and writing difficulties. This longitudinal study investigated the performance of a cohort of 1998 Reading Recovery students on later literacy achievement as measured by the 2001 Grade 4 Maine Educational Assessment (MEA). The results showed that the average MEA…

  18. The Impact of Teacher Preparation on Student Achievement in Rural Secondary Schools

    ERIC Educational Resources Information Center

    Barnes, Shontier Prescott

    2009-01-01

    The primary purpose of this study was to examine significant differences, if any, in student achievement in the area of math and science of students taught by traditionally certified teachers and alternatively certified teachers. This study examined alternatively certified teachers, as identified from through the Georgia TAPP (Teacher Alternative…

  19. The Impact of Discovery Learning in Writing Instruction on Fifth-Grade Student Achievement

    ERIC Educational Resources Information Center

    Treadwell, Julie Wilson

    2010-01-01

    The problem is that 5th-grade students are not achieving sufficient writing scores on Georgia state-mandated writing assessments, which the researcher hypothesized was due to the teacher-directed instructional approach utilized at the school. The purpose of this mixed-methods study was to determine whether discovery learning, a method based on the…

  20. Impact of Physical Environment on Academic Achievement of High School Youth.

    ERIC Educational Resources Information Center

    Burkhalter, Bettye B.

    1983-01-01

    To study the relationship of the physical environment to high school students' academic achievement, 60 students participated in an experiential career exploration program at the Alabama Space and Rocket Center while 108 students participated in a traditional careers program. Tests indicated the former group improved more in career choice…

  1. How Do Life Goals and Motivations of International Students Studying in Australia Impact Their Achievement Outcomes?

    ERIC Educational Resources Information Center

    Guns, Ann; Richardson, Paul W.; Watt, Helen M. G.

    2012-01-01

    Many international students aim beyond their country boundaries by moving away from home and studying abroad. This longitudinal design addressed a gap in current research, by linking together antecedent life goals and motivations on entry to students' studies, to predict exit achievement scores, to provide information concerning optimising…

  2. Learning Nanotechnology with Texts and Comics: The Impacts on Students of Different Achievement Levels

    ERIC Educational Resources Information Center

    Lin, Shu-Fen; Lin, Huann-shyang

    2016-01-01

    Comics are popular with adolescents because of their features of humor, narrative, and visual imagery. The purposes of this study were to examine the learning outcomes and emotional perceptions of reading a science comic book and a science text booklet for students of different levels of achievement, and to explore the main factors of the two…

  3. The Impact on Writing Achievement of Two Bilingual Education Models for English Language Learners

    ERIC Educational Resources Information Center

    Valdez, Angela L.

    2012-01-01

    The number of English language learners (ELLs) within the school system in one Western U.S. state continues to rise; writing scores of ELLs lag well behind those of their English speaking peers. The purpose of this ex post facto quantitative causal comparative study was to examine the writing achievement of fourth grade ELLs instructed within a…

  4. Impact of Attending Jump Start Literacy Camp on Reading Achievement among Third and Fourth Grade Students

    ERIC Educational Resources Information Center

    Padgett, Carrie B.

    2010-01-01

    The Jump Start Literacy Camp was developed as a means to combat summer learning loss. The camp utilized high-energy activities to target phonemic awareness, phonics, vocabulary, fluency, and comprehension. This study examined the effects of the Jump Start Literacy Camp on reading achievement for rising third and fourth grade students in an urban…

  5. Impact of Explicit Vocabulary Instruction on Writing Achievement of Upper-Intermediate EFL Learners

    ERIC Educational Resources Information Center

    Solati-Dehkordi, Seyed Amir; Salehi, Hadi

    2016-01-01

    Studying explicit vocabulary instruction effects on improving L2 learners' writing skill and their short and long-term retention is the purpose of the present study. To achieve the mentioned goal, a fill-in-the-blank test including 36 single words and 60 lexical phrases were administrated to 30 female upper-intermediate EFL learners. The EFL…

  6. Impact of Facebook Usage on Students' Academic Achievement: Role of Self-Regulation and Trust

    ERIC Educational Resources Information Center

    Rouis, Sana; Limayem, Moez; Salehi-Sangari, Esmail

    2011-01-01

    Introduction: The paper provides a preliminary analysis of the effects of Facebook usage by undergraduate students at Lulea University of Technology in Sweden. The proposed research model tests the perceived effect of personality traits, self-regulation, and trust on students' achievements. Based on flow theory, the model suggests negative…

  7. The Impact of Handheld Graphing Calculator Use on Student Achievement in Algebra 1

    ERIC Educational Resources Information Center

    Heller, Joan I.; Curtis, Deborah A.; Jaffe, Rebecca; Verboncoeur, Carol J.

    2005-01-01

    This study investigated the relationship between instructional use of handheld graphing calculators and student achievement in Algebra 1. Three end-of-course test forms were administered (without calculators) using matrix sampling to 458 high-school students in two suburban school districts in Oregon and Kansas. Test questions on two forms were…

  8. The Economic Impact of Achievement Gaps in Pennsylvania's Public Schools. Research Report

    ERIC Educational Resources Information Center

    Karoly, Lynn A.

    2015-01-01

    This study documents the magnitude of the gaps in student performance for public school students in Pennsylvania and estimates the economic consequences of those education performance gaps. Although Pennsylvania is one of the top-scoring states on the 2013 National Assessment of Educational Progress (NAEP) on average, the achievement gaps between…

  9. The Impact of Acculturation on the Perception of Academic Achievement by Immigrant Mothers and Their Children

    ERIC Educational Resources Information Center

    Zadeh, Zohreh Yaghoub; Geva, Esther; Rogers, Maria A.

    2008-01-01

    This study investigated the effect of acculturation on definitions and attributions towards children's school achievement. Iranian and Iranian-Canadian immigrant mothers and their upper-elementary school children were interviewed about their definitions and attributions about school success and failure. There were significant effects of…

  10. The Impact of Early Childhood Education upon the Black-White Achievement Gap

    ERIC Educational Resources Information Center

    Zane, Linda M.

    2009-01-01

    It can be argued that the current Black-White achievement gap provides evidence for a long-standing history of racial inequity within American society, as well as an informative barometer of progress toward educational parity. By all accounts, the measurements registered by this barometer continue to be cause for alarm. The disturbing Black-White…

  11. The Impact of Instructional Methodology on the Reading Achievement of African American Males

    ERIC Educational Resources Information Center

    Cooper, Terri I.

    2012-01-01

    The academic achievement gap that exists between African American students and their Caucasian peers is a challenging national concern for which an absolute solution has been elusive. Specifically, the African American male over-represents failure in most academic categories. Policy makers and educators acknowledge that this represents a national…

  12. Lagging in the Race: The Impact of Teacher Morale on Student Achievement

    ERIC Educational Resources Information Center

    Covington, Char-Shenda D.

    2010-01-01

    The effect teachers have on student achievement is perennial. Several factors contribute to declining teacher morale. Teachers have an insuperable amount of responsibilities and duties. Stress related to increased federal, state, and local demands, low pay, lack of administrative support, and heightened discipline problems, are all factors that…

  13. Classroom Learning and Achievement: How the Complexity of Classroom Interaction Impacts Students' Learning

    ERIC Educational Resources Information Center

    Podschuweit, Sören; Bernholt, Sascha; Brückmann, Maja

    2016-01-01

    Background: Complexity models have provided a suitable framework in various domains to assess students' educational achievement. Complexity is often used as the analytical focus when regarding learning outcomes, i.e. when analyzing written tests or problem-centered interviews. Numerous studies reveal negative correlations between the complexity of…

  14. The Impact of Principal Leadership on School Culture and Student Achievement

    ERIC Educational Resources Information Center

    Troutman, Lisa Dorman

    2012-01-01

    Throughout the United States school principals are subject to increasingly high demands for student accountability. Under the pressures and mandates of this federal legislation, principals are asking themselves what specific leadership practices affect student achievement. A review of literature shows that principals are regarded as a major factor…

  15. Working on the Work Framework for Engagement: Impacting Students' Perceived Learning, Attitudes toward School, and Achievement

    ERIC Educational Resources Information Center

    Forehand, Michael Joshua

    2014-01-01

    A quasi-experimental, pre-test post-test nonequivalent control group study was utilized to determine the difference in students' perceived learning, attitudes toward school, and achievement when participating in classes utilizing engagement design qualities as compared to students in classes not utilizing engagement design qualities. To inform the…

  16. The Impact of Music Education and Athletic Participation on Academic Achievement.

    ERIC Educational Resources Information Center

    Schneider, Timothy W.; Klotz, Jack

    This study sought to determine if participation as a musician or an athlete had an effect on academic achievement as measured by standardized test scores. It was hypothesized that students who received training as musicians would score higher on the core battery composite of reading, language, and mathematics sections of the California Achievement…

  17. The Impact of Reading Success Academy on High School Reading Achievement

    ERIC Educational Resources Information Center

    Burlison, Kelly; Chave, Josh

    2014-01-01

    The study explores the effectiveness of the Reading Success Academy on the reading achievement of the selected group of ninth-grade students in a comprehensive high school. We examine in what ways the Reading Success Academy may improve the reading proficiency rates and amount of reading growth of ninth-grade students. The results indicate that…

  18. An Investigation of the Impact of Asynchronous Online Learning on Student Achievement

    ERIC Educational Resources Information Center

    Hill, Sylvia

    2009-01-01

    Asynchronous online learning is well documented with adults, but fewer studies of effectiveness have emphasized elementary education learning environments. This study investigated student achievement on the Texas Assessment of Knowledge and Skills (TAKS) test for fifth grade students who had participated in synchronous and asynchronous courses…

  19. Servant Leadership and Its Impact on Classroom Climate and Student Achievement

    ERIC Educational Resources Information Center

    Mulligan, Daniel F.

    2016-01-01

    The purpose of this quantitative research was to see to what degree a relationship existed between servant leadership, classroom climate, and student achievement in a collegiate environment. This was a quantitative, correlational study. The foundational theories for this research included servant leadership and organizational climate that pertain…

  20. How Does School Climate Impact Academic Achievement? An Examination of Social Identity Processes

    ERIC Educational Resources Information Center

    Reynolds, Katherine J.; Lee, Eunro; Turner, Isobel; Bromhead, David; Subasic, Emina

    2017-01-01

    In explaining academic achievement, school climate and social belonging (connectedness, identification) emerge as important variables. However, both constructs are rarely explored in one model. In the current study, a social psychological framework based on the social identity perspective (Turner, Hogg, Oakes, Reicher, & Wetherell, 1987) is…

  1. The Impact of Online Algorithm Visualization on ICT Students' Achievements in Introduction to Programming Course

    ERIC Educational Resources Information Center

    Saltan, Fatih

    2017-01-01

    Online Algorithm Visualization (OAV) is one of the recent developments in the instructional technology field that aims to help students handle difficulties faced when they begin to learn programming. This study aims to investigate the effect of online algorithm visualization on students' achievement in the introduction to programming course. To…

  2. The Impact of High School Size on Math Achievement and Dropout Rate

    ERIC Educational Resources Information Center

    Werblow, Jacob; Duesbery, Luke

    2009-01-01

    The study explores the ways in which school size influences two important student outcomes commonly used in school effects research: growth in mathematics achievement and dropout rate. Past research suggests that smaller high schools can lead to increased benefits for students. In this study, multilevel analytic models of the first two waves of…

  3. The Impact of the Data Team Structure on Collaborative Teams and Student Achievement

    ERIC Educational Resources Information Center

    Rone, Brenda Catherine

    2009-01-01

    The purpose of this study was to determine if implementing a specific collaborative structure would create effective teacher teams that in turn would lead to improved student achievement. An effective team can be viewed as one that uses collaboration to increase its knowledge and improve its practices. The structure that was implemented during…

  4. Impacts of Comprehensive Reading Instruction on Diverse Outcomes of Low- and High-Achieving Readers

    ERIC Educational Resources Information Center

    Guthrie, John T.; McRae, Angela; Coddington, Cassandra S.; Klauda, Susan Lutz; Wigfield, Allan; Barbosa, Pedro

    2009-01-01

    Low-achieving readers in Grade 5 often lack comprehension strategies, domain knowledge, word recognition skills, fluency, and motivation to read. Students with such multiple reading needs seem likely to benefit from instruction that supports each of these reading processes. The authors tested this expectation experimentally by comparing the…

  5. Impact of Health on Education Access and Achievement. Policy Brief Number 3

    ERIC Educational Resources Information Center

    Pridmore, P.

    2008-01-01

    Access to education is recognized as a basic human right and yet projections based on current trends show that more than 50 countries will not achieve universal primary education by 2015. This briefing paper looks at the role of malnutrition and diseases in the failure of countries to meet EFA targets. It is based on the CREATE Pathways to Access…

  6. The Impact of Principal Movement and School Achievement on Principal Salaries

    ERIC Educational Resources Information Center

    Tran, Henry; Buckman, David G.

    2017-01-01

    This study examines whether principals' movements and school achievement are associated with their salaries. Predictors of principal salaries were examined using three years of panel data. Results from a fixed-effects regression analysis suggest that principals who moved to school leadership positions in other districts leveraged higher salaries…

  7. The Impact of Scaffolding and Student Achievement Levels in a Problem-Based Learning Environment

    ERIC Educational Resources Information Center

    Simons, Krista D.; Klein, James D.

    2007-01-01

    This study examined how scaffolds and student achievement levels influence inquiry and performance in a problem-based learning environment. The scaffolds were embedded within a hypermedia program that placed students at the center of a problem in which they were trying to become the youngest person to fly around the world in a balloon. One-hundred…

  8. The Impact of School Management Strategies on Academic Achievement in Texas Schools

    ERIC Educational Resources Information Center

    Ogundokun, Olubunmi K.

    2012-01-01

    This study analyzes the relationship between school management strategies and student's academic achievement, while controlling for factors such as the school principals' age, gender, experience, as well as school size and location, Student's Social Economics Status (SES), English as a Second Language learner's population (ESL), Special Education…

  9. Peer Effects in Urban Schools: Assessing the Impact of Classroom Composition on Student Achievement

    ERIC Educational Resources Information Center

    Gottfried, Michael A.

    2014-01-01

    This study evaluates the effects of classroom peers on standardized testing achievement for all third- and fourth-grade students in the Philadelphia School District over 6 school years. With a comprehensive individual-and multilevel data set of all students matched to teachers, classrooms, and schools, two empirical strategies are employed. The…

  10. Impact of Video Presentation Features on Instructional Achievement and Intrinsic Motivation in Secondary School Learners

    ERIC Educational Resources Information Center

    Bland, Ronald B.

    2012-01-01

    This study analyzed instructional achievement and intrinsic motivation among 21st century secondary students utilizing a video lecture incorporating both student reaction cutaway images and immediate content interaction within the lecture. Respondents (n = 155) were from multiple classes and grade levels at a suburban Texas high school. Four…

  11. The Impact of Direct Instruction on Elementary Students' Reading Achievement in an Urban School District.

    ERIC Educational Resources Information Center

    Mac Iver, Martha Abele; Kemper, Elizabeth

    2002-01-01

    Examined preliminary achievement outcomes of the first years of direct instruction reading within six Baltimore elementary schools. Overall, members of the original second grade cohort were nearing grade level by the end of fifth grade in both intervention and control schools. Future research based on well-established program implementation might…

  12. The impact of the achievement motive on athletic performance in adolescent football players.

    PubMed

    Zuber, Claudia; Conzelmann, Achim

    2014-01-01

    Researchers largely agree that there is a positive relationship between achievement motivation and athletic performance, which is why the achievement motive is viewed as a potential criterion for talent. However, the underlying mechanism behind this relationship remains unclear. In talent and performance models, main effect, mediator and moderator models have been suggested. A longitudinal study was carried out among 140 13-year-old football talents, using structural equation modelling to determine which model best explains how hope for success (HS) and fear of failure (FF), which are the aspects of the achievement motive, motor skills and abilities that affect performance. Over a period of half a year, HS can to some extent explain athletic performance, but this relationship is not mediated by the volume of training, sport-specific skills or abilities, nor is the achievement motive a moderating variable. Contrary to expectations, FF does not explain any part of performance. Aside from HS, however, motor abilities and in particular skills also predict a significant part of performance. The study confirms the widespread assumption that the development of athletic performance in football depends on multiple factors, and in particular that HS is worth watching in the medium term as a predictor of talent.

  13. The Impact of the Shifting Knowledge Base, from Development to Achievement, on Early Childhood Education Programs

    ERIC Educational Resources Information Center

    Tyler, Kathleen P.

    2012-01-01

    Interest in child development as a knowledge base for early childhood education programs flourished in the 1970s as a result of the theories and philosophies of Jean Piaget and other cognitive developmentalists. During subsequent decades in America, reform movements emphasizing accountability and achievement became a political and social…

  14. Predictors of Creative Achievement: Assessing the Impact of Entrepreneurial Potential, Perfectionism, and Employee Engagement

    ERIC Educational Resources Information Center

    Ahmetoglu, Gorkan; Harding, Xanthe; Akhtar, Reece; Chamorro-Premuzic, Tomas

    2015-01-01

    Creativity is a key ingredient of organizational effectiveness, business innovation, and entrepreneurship. Yet there remain substantial gaps in the literature in terms of understanding the antecedents of creative achievement. This study investigated the effect of perfectionism, employee engagement, and entrepreneurial potential as predictors of…

  15. Using State or Study-Administered Achievement Tests in Impact Evaluations

    ERIC Educational Resources Information Center

    Olsen, Robert B.; Unlu, Fatih; Jaciw, Andrew P.

    2010-01-01

    This report, which has been prepared by Abt Associates for the Institute of Education Sciences' National Center for Education Evaluation and Regional Assistance, takes an important first step in sorting out the implications of relying on state tests for general, student-level measures of reading and math achievement in evaluations of educational…

  16. What Works Clearinghouse Quick Review: "KIPP Middle Schools: Impacts on Achievement and Other Outcomes, Final Report"

    ERIC Educational Resources Information Center

    What Works Clearinghouse, 2013

    2013-01-01

    This study examined whether attending a Knowledge is Power Program (KIPP) middle school improved students' reading, math, social studies, and science achievement for up to 4 years following enrollment. The study reported that students attending KIPP middle schools scored statistically significantly higher than matched students on all of the state…

  17. The impact of home computers on 12th grade students' achievement in the computer science curriculum in Riyadh, Saudi Arabia

    NASA Astrophysics Data System (ADS)

    Aljuwaiber, Mohammed A.

    Technology has improved many educational issues. This is a very exciting time for technology and education. The primary purpose of this study was aimed at understanding the impact of home computer use on academic achievement in the computer curriculum of the 12th grade students in Riyadh, Kingdom of Saudi Arabia. In particular, the study attempted to determine if the use of home computers would be an effective manner for increasing students' academic achievement. The participants of the study were 240 male and female students as a random sample from 12th grade from eight random high schools in Riyadh, Saudi Arabia. An achievement exam and survey were developed by the researcher based on the computer science curriculum topics, the quantitative data was collected in both a single achievement exam and a single survey from a sample of 240 Saudi high school students. Both the survey and an achievement exam were split equally between male and female students. The study sought the answer to 10 questions. Analysis of variance (ANOVA), followed by tests of simple main effects and post hoc comparisons using Scheffe, as well as Pearson Correlation were conducted to answer the research questions. The study results pointed out that home computers were important to support the students in their academic achievement in the computer science curriculum. Therefore, more attention must be given to the use of home computers for all students. Moreover, we should attempt to treat the difficulties which students face for getting computers in their homes.

  18. The Impact of Music Education on Academic Achievement in Reading and Math

    ERIC Educational Resources Information Center

    Deere, Kelli Beth

    2010-01-01

    Increased scrutiny on the place of music education in school systems has caused some school systems to eliminate their music program entirely. School systems are being forced to place more emphasis on increased testing and accountability with the No Child Left Behind Act of 2001. This study examined the impact music education has on academic…

  19. Achieving a Greater Impact: Developing the Skills of Teaching Artists to Lead Professional Development for Teachers

    ERIC Educational Resources Information Center

    Duma, Amy L.; Silverstein, Lynne B.

    2008-01-01

    Teaching artists know that there are many more students who could benefit from learning in and through the arts, but school budgets as well as teaching artists' time and energy are limited. As years pass, teaching artists face the reality that they will reach only a fraction of the students in need. To extend their impact dramatically, some…

  20. The Impact of Supplemental Instruction on Low-Achieving Adolescents' Reading Engagement

    ERIC Educational Resources Information Center

    Cantrell, Susan Chambers; Almasi, Janice F.; Rintamaa, Margaret; Carter, Janis C.; Pennington, Jessica; Buckman, D. Matt

    2014-01-01

    The authors examined the impact of a supplemental reading course on 462 sixth-grade students' reading engagement and performance as compared with 389 students in a control group. They further explored students' cognitive strategy use through think aloud processes with a subset of students who participated in the intervention.…

  1. How Does School Mobility Impact Indicators of Academic Achievement for Highly Mobile Students?

    ERIC Educational Resources Information Center

    Tanner-McBrien, Laura

    2010-01-01

    Children who are homeless or in foster care change schools more often than their non-mobile peers. The impact of school mobility increases their risk of academic failure (Evans, 1996; Ingersoll, Scamman, & Eckerling, 1989; Mao, 1997, Mehana & Reynolds, 2003; Reynolds & Wolf, 1999). Laws enforcing the right of students to remain in…

  2. Impact of Teacher Perceptions of Their Working Conditions on Elementary School Student Achievement

    ERIC Educational Resources Information Center

    Vause, Bonnie W.

    2012-01-01

    Reading and math proficiency is important for all students because education is a leading indicator of personal health and success and national prosperity. Improved student performance has also been linked to teacher satisfaction. The purpose of this study was to investigate the impact of teacher perceptions of their working conditions on student…

  3. Evaluating the Impact of National Educational Policy to Reduce Retention and Increase Achievement in Compulsory Education

    ERIC Educational Resources Information Center

    Barata, M. Clara; Calheiros, M. Manuela; Patrício, Joana Nunes; Graça, João; Lima, M. Luisa

    2015-01-01

    Despite the accumulated evidence that retention is an ineffective and potentially harmful remedial strategy, several countries struggle with high levels of retention in compulsory schooling. This article provides evidence of the impact of the Portuguese national educational policy "Programa Mais Sucesso Escolar" (PMSE) using class size,…

  4. An Integrated Learning System: Impact on At-Risk Students' Ninth Grade TAKS Mathematics Achievement

    ERIC Educational Resources Information Center

    Harris, Tina D.

    2011-01-01

    The purpose of this study was to determine the impact of an integrated learning system on students who were considered at-risk of academic failure on the Texas Assessment of Knowledge and Skills (TAKS) mathematics assessment. Voyager Math (VMath), an integrated learning system had been implemented to address the needs of students at-risk of…

  5. Measuring the Impact of Advanced Placement Failure on Students' Academic Achievement and Retention in College

    ERIC Educational Resources Information Center

    Kutchner, Wendy

    2012-01-01

    This quantitative study examined the impact that Advanced Placement (AP) coursework had on students attending college with specific emphasis on those who failed the exam. The study comprised four years of entering freshmen students between the academic years 2006-2009. The study was comprehensive in that it revealed all AP attempts regardless of…

  6. Do Teacher Absences Impact Student Achievement? Longitudinal Evidence from One Urban School District

    ERIC Educational Resources Information Center

    Miller, Raegen T.; Murnane, Richard J.; Willett, John B.

    2008-01-01

    This article exploits highly detailed data on teacher absences from a large urban school district in the northern United States to shed light on the determinants and effects of teacher absences. The topic is important because both school and district policies can influence teachers' propensity to be absent. The authors estimate the impact of…

  7. The Impact of Computer-Assisted Instruction on Mathematics Achievement of Underachieving Fifth-Grade Students

    ERIC Educational Resources Information Center

    Bruce-Simmons, Christine

    2013-01-01

    This study examined the impact of computer-assisted instruction on the mathematics performance of underachieving fifth-grade students in a rural school district in South Carolina. The instructional technology program ([IF) is South Carolina's response to addressing the needs of its young, struggling math students. The 449 fifth-grade students in…

  8. The Impact of SMART Board Technology on Growth in Mathematics Achievement of Gifted Learners

    ERIC Educational Resources Information Center

    Riska, Patricia A.

    2010-01-01

    This study examined whether SMART Board technology increased growth in mathematics performance of fourth grade gifted students. Gifted students in North Carolina were studied to determine if the use of SMART Board technology during mathematics instruction impacted their growth on standardized state tests. The sample consisted of 175 students from…

  9. Technology Facilitated PBL Pedagogy and Its Impact on Nursing Students' Academic Achievement and Critical Thinking Dispositions

    ERIC Educational Resources Information Center

    Yu, Wei-Chieh Wayne; Lin, Chunfu Charlie; Ho, Mei-Hsin; Wang, Jenny

    2015-01-01

    The impact of particular learning environments and self-regulation could be a beneficial area for research focus. More specifically, there has not been sufficient attention given to the role played by disposition or "will" in facilitating self-regulation to be successful. A student can possess the skills or ability to think critically…

  10. Impact of National Board for the Professional Teaching Standards Certification on Student Achievement

    ERIC Educational Resources Information Center

    Belson, Sarah Irvine; Husted, Thomas A.

    2015-01-01

    A growing number of teachers have undertaken National Board for Professional Teaching Standards (NBPTS) certification training since its inception over twenty-five years ago. Previous empirical research on the impact of NBCTs on student performance has focused on state or district-level exams in individual states and found mixed results. This…

  11. The Impact of a Standalone, Patient-centered Communication Course Series on Student Achievement, Preparedness, and Attitudes

    PubMed Central

    McNair, Chelsea D.; Linnebur, Sunny A.; Valdez, Connie; Trujillo, Toby C.

    2016-01-01

    Objective. To evaluate the impact of a standalone, patient-centered communication (PCC) course series on student achievement of and perceived preparedness for PCC skills and to assess student attitudes regarding learning methods used. Design. During curriculum renewal, a standalone PCC course series that integrated horizontally and vertically within the curriculum was developed. Student achievement of outcomes was evaluated by aggregate performance on simulated evaluations. Students who completed the PCC series were surveyed to assess preparedness and attitudes. Students in the prior curriculum were also surveyed. Assessment. The majority of students who completed the PCC series met or exceeded expectations for the simulated evaluations. Preparedness responses were more positive from students who completed the PCC series than from those who completed the prior curriculum. Student attitudes about the learning methods use in the courses also were more positive. Conclusion. The standalone PCC course series effectively achieved PCC outcomes and improved student preparedness for communication-based activities. PMID:28179723

  12. The Impact of a Standalone, Patient-centered Communication Course Series on Student Achievement, Preparedness, and Attitudes.

    PubMed

    Trujillo, Jennifer M; McNair, Chelsea D; Linnebur, Sunny A; Valdez, Connie; Trujillo, Toby C

    2016-12-25

    Objective. To evaluate the impact of a standalone, patient-centered communication (PCC) course series on student achievement of and perceived preparedness for PCC skills and to assess student attitudes regarding learning methods used. Design. During curriculum renewal, a standalone PCC course series that integrated horizontally and vertically within the curriculum was developed. Student achievement of outcomes was evaluated by aggregate performance on simulated evaluations. Students who completed the PCC series were surveyed to assess preparedness and attitudes. Students in the prior curriculum were also surveyed. Assessment. The majority of students who completed the PCC series met or exceeded expectations for the simulated evaluations. Preparedness responses were more positive from students who completed the PCC series than from those who completed the prior curriculum. Student attitudes about the learning methods use in the courses also were more positive. Conclusion. The standalone PCC course series effectively achieved PCC outcomes and improved student preparedness for communication-based activities.

  13. The impact of size of cooperative group on achievement, social support, and self-esteem.

    PubMed

    Bertucci, Andrea; Conte, Stella; Johnson, David W; Johnson, Roger T

    2010-01-01

    The effect of cooperative learning in pairs and groups of 4 and in individualistic learning were compared on achievement, social support, and self-esteem. Sixty-two Italian 7th-grade students with no previous experience with cooperative learning were assigned to conditions on a stratified random basis controlling for ability, gender, and self-esteem. Students participated in 1 instructional unit for 90 min for 6 instructional days during a period of about 6 weeks. The results indicate that cooperative learning in pairs and 4s promoted higher achievement and greater academic support from peers than did individualistic learning. Students working in pairs developed a higher level of social self-esteem than did students learning in the other conditions.

  14. A Scientist's Guide to Achieving Broader Impacts through K–12 STEM Collaboration

    PubMed Central

    Komoroske, Lisa M.; Hameed, Sarah O.; Szoboszlai, Amber I.; Newsom, Amanda J.; Williams, Susan L.

    2015-01-01

    The National Science Foundation and other funding agencies are increasingly requiring broader impacts in grant applications to encourage US scientists to contribute to science education and society. Concurrently, national science education standards are using more inquiry-based learning (IBL) to increase students’ capacity for abstract, conceptual thinking applicable to real-world problems. Scientists are particularly well suited to engage in broader impacts via science inquiry outreach, because scientific research is inherently an inquiry-based process. We provide a practical guide to help scientists overcome obstacles that inhibit their engagement in K–12 IBL outreach and to attain the accrued benefits. Strategies to overcome these challenges include scaling outreach projects to the time available, building collaborations in which scientists’ research overlaps with curriculum, employing backward planning to target specific learning objectives, encouraging scientists to share their passion, as well as their expertise with students, and transforming institutional incentives to support scientists engaging in educational outreach. PMID:26955078

  15. A Scientist's Guide to Achieving Broader Impacts through K-12 STEM Collaboration.

    PubMed

    Komoroske, Lisa M; Hameed, Sarah O; Szoboszlai, Amber I; Newsom, Amanda J; Williams, Susan L

    2015-03-01

    The National Science Foundation and other funding agencies are increasingly requiring broader impacts in grant applications to encourage US scientists to contribute to science education and society. Concurrently, national science education standards are using more inquiry-based learning (IBL) to increase students' capacity for abstract, conceptual thinking applicable to real-world problems. Scientists are particularly well suited to engage in broader impacts via science inquiry outreach, because scientific research is inherently an inquiry-based process. We provide a practical guide to help scientists overcome obstacles that inhibit their engagement in K-12 IBL outreach and to attain the accrued benefits. Strategies to overcome these challenges include scaling outreach projects to the time available, building collaborations in which scientists' research overlaps with curriculum, employing backward planning to target specific learning objectives, encouraging scientists to share their passion, as well as their expertise with students, and transforming institutional incentives to support scientists engaging in educational outreach.

  16. Impact of instructional Approaches to Teaching Elementary Science on Student Achievement

    NASA Astrophysics Data System (ADS)

    Kensinger, Seth H.

    Strengthening our science education in the United States is essential to the future success of our country in the global marketplace. Immersing our elementary students with research-based quality science instruction is a critical component to build a strong foundation and motivate our students to become interested in science. The research for this study pertained to the type of elementary science instruction in correlation to academic achievement and gender. Through this study, the researcher answered the following questions: 1. What is the difference in achievement for elementary students who have been taught using one of the three science instructional approaches analyzed in this study: traditional science instruction, inquiry-based science instruction with little or no professional development and inquiry-based science instruction with high-quality professional development? 2. What is the difference in student achievement between inquiry-based instruction and non-inquiry based (traditional) instruction? 3. What is the difference in student achievement between inquiry with high quality professional development and inquiry with little or no professional development? 4. Do the three instructional approaches have differentiated effects across gender? The student achievement was measured using the 2010 fourth grade Pennsylvania System of School Assessment (PSSA) in Science. Data was collected from 15 elementary schools forming three main groupings of similar schools based on the results from the 2009 third grade PSSA in Mathematics and student and community demographics. In addition, five sub-group triads were formed to further analyze the data and each sub-group was composed of schools with matching demographic data. Each triad contained a school using a traditional approach to teaching science, a school utilizing an inquiry science approach with little or no professional development, and a school incorporating inquiry science instruction with high quality

  17. Superior Ballistic Impact Resistance Achieved by the Co-Base Alloy Haynes 25

    NASA Technical Reports Server (NTRS)

    Hebsur, Mohan G.; Noebe, Ronald D.; Revilock, Duane M.

    2003-01-01

    The fan case in a jet engine is required to contain a fan blade in the rare event of a blade loss during operation. Because of its function, the fan case is the largest structural component in high-bypass-ratio turbofan engines used in commercial aircraft. Therefore, the use of lighter and stronger materials would be advantageous in most engines and is practically a necessity in the latest generation of high-bypass engines. Small panels, 7 in. wide by 7 in. long, of a number of metallic alloys were impact tested at room temperature with a 0.50-caliber blunt-nose titanium alloy projectile at the NASA Glenn Research Center (ref. 1). These metallic systems included several high-strength aluminum (Al) alloys, Al-based laminates, aluminum metal matrix composites (Al-MMCs), nickel-base superalloys (Inconel 718 and 625), several titanium (Ti) alloys in different heat treated conditions, 304L stainless steel, a stainless-steel-based laminate, and a high strength steel (Nitronic 60). It was determined that a simple Co-base alloy (Haynes 25) had the best impact resistance on an areal weight basis. Haynes 25 was at least 10 percent better than IMI 550, the best titanium alloy tested to date, and it was far superior to other metals, especially at higher impact velocities (greater than 1100 ft/sec). Because this material could be ideal for fan containment applications in supersonic aircraft as a replacement for titanium, impact tests were also conducted at 371 oC and compared with results from alloys tested at elevated temperature under previous programs (i.e., Inconel 718, Ti-6242, M-152, Timetal 21S, and Aeromet 100). Although cobalt-base alloys are used in some high-temperature engine applications, to our knowledge they are not used in any containment systems. Advantages of cobalt over titanium include lower cost, easier processing, better high-temperature strength, and no fire hazard if tip rub occurs. Future plans include testing of lightweight sandwich panels with Haynes

  18. Advancing efforts to achieve health equity: equity metrics for health impact assessment practice.

    PubMed

    Heller, Jonathan; Givens, Marjory L; Yuen, Tina K; Gould, Solange; Jandu, Maria Benkhalti; Bourcier, Emily; Choi, Tim

    2014-10-24

    Equity is a core value of Health Impact Assessment (HIA). Many compelling moral, economic, and health arguments exist for prioritizing and incorporating equity considerations in HIA practice. Decision-makers, stakeholders, and HIA practitioners see the value of HIAs in uncovering the impacts of policy and planning decisions on various population subgroups, developing and prioritizing specific actions that promote or protect health equity, and using the process to empower marginalized communities. There have been several HIA frameworks developed to guide the inclusion of equity considerations. However, the field lacks clear indicators for measuring whether an HIA advanced equity. This article describes the development of a set of equity metrics that aim to guide and evaluate progress toward equity in HIA practice. These metrics also intend to further push the field to deepen its practice and commitment to equity in each phase of an HIA. Over the course of a year, the Society of Practitioners of Health Impact Assessment (SOPHIA) Equity Working Group took part in a consensus process to develop these process and outcome metrics. The metrics were piloted, reviewed, and refined based on feedback from reviewers. The Equity Metrics are comprised of 23 measures of equity organized into four outcomes: (1) the HIA process and products focused on equity; (2) the HIA process built the capacity and ability of communities facing health inequities to engage in future HIAs and in decision-making more generally; (3) the HIA resulted in a shift in power benefiting communities facing inequities; and (4) the HIA contributed to changes that reduced health inequities and inequities in the social and environmental determinants of health. The metrics are comprised of a measurement scale, examples of high scoring activities, potential data sources, and example interview questions to gather data and guide evaluators on scoring each metric.

  19. A New Technique for Achieving Impact Velocities Greater Than 10 km/sec

    NASA Technical Reports Server (NTRS)

    Piekutowski, A. J.; Nolen, Angie (Technical Monitor)

    2001-01-01

    This Contractor Report describes and presents the results of work that was done in an attempt to develop an augmented acceleration technique that would launch small projectiles of known shape, mass, and state to velocities of 10 km/sec and higher. The higher velocities were to be achieved by adding a third stage to a conventional two-stage, light-gas gun and using a modified firing cycle for the third stage. The technique did not achieve the desired results and was modified for use during the development program. Since the design of the components used for the augmented-acceleration, three-stage launcher could be readily adapted for use as a three-stage launcher that used a single-stage acceleration cycle; the remainder of the contract period was spent performing test firings using the modified three-stage launcher. Work with the modified three-stage launcher, although not complete, did produce test firings in which an 0.11-g cylindrical nylon projectile was launched to a velocity of 8.65 km/sec.

  20. Petroleum production at Maximum Efficient Rate Naval Petroleum Reserve No. 1 (Elk Hills), Kern County, California. Final Supplemental Environmental Impact Statement

    SciTech Connect

    Not Available

    1993-07-01

    This document provides an analysis of the potential impacts associated with the proposed action, which is continued operation of Naval Petroleum Reserve No. I (NPR-1) at the Maximum Efficient Rate (MER) as authorized by Public law 94-258, the Naval Petroleum Reserves Production Act of 1976 (Act). The document also provides a similar analysis of alternatives to the proposed action, which also involve continued operations, but under lower development scenarios and lower rates of production. NPR-1 is a large oil and gas field jointly owned and operated by the federal government and Chevron U.SA Inc. (CUSA) pursuant to a Unit Plan Contract that became effective in 1944; the government`s interest is approximately 78% and CUSA`s interest is approximately 22%. The government`s interest is under the jurisdiction of the United States Department of Energy (DOE). The facility is approximately 17,409 acres (74 square miles), and it is located in Kern County, California, about 25 miles southwest of Bakersfield and 100 miles north of Los Angeles in the south central portion of the state. The environmental analysis presented herein is a supplement to the NPR-1 Final Environmental Impact Statement of that was issued by DOE in 1979 (1979 EIS). As such, this document is a Supplemental Environmental Impact Statement (SEIS).

  1. Asymmetric material impact: Achieving free surfaces velocities nearly double that of the projectile

    DOE PAGES

    Aslam, Tariq; Dattelbaum, Dana; Gustavsen, Richard; ...

    2015-05-19

    Hypervelocity impact speeds are often limited by practical considerations in guns and explosive driven systems. In particular, for gas guns (both powder driven and light gas guns), there is the general trend that higher projectile speeds often come at the expense of smaller diameters, and thus less time for examining shock phenomena prior to two dimensional release waves affecting the observed quantities of interest. Similarly, explosive driven systems have their own set of limiting conditions due to limitations in explosive energy and size of devices required as engineering dimensions increase. The focus in this study is to present a methodologymore » of obtaining free surface velocities well in excess of the projectile velocity. The key to this approach is in using a high impedance projectile that impacts a series of progressively lower impedance materials. The free surface velocity (if they were separated) of each of the progressively lower impedance materials would increase for each material. The theory behind this approach, as well as experimental results are presented.« less

  2. Asymmetric material impact: Achieving free surfaces velocities nearly double that of the projectile

    SciTech Connect

    Aslam, Tariq; Dattelbaum, Dana; Gustavsen, Richard; Scharff, Robert; Byers, Mark

    2015-05-19

    Hypervelocity impact speeds are often limited by practical considerations in guns and explosive driven systems. In particular, for gas guns (both powder driven and light gas guns), there is the general trend that higher projectile speeds often come at the expense of smaller diameters, and thus less time for examining shock phenomena prior to two dimensional release waves affecting the observed quantities of interest. Similarly, explosive driven systems have their own set of limiting conditions due to limitations in explosive energy and size of devices required as engineering dimensions increase. The focus in this study is to present a methodology of obtaining free surface velocities well in excess of the projectile velocity. The key to this approach is in using a high impedance projectile that impacts a series of progressively lower impedance materials. The free surface velocity (if they were separated) of each of the progressively lower impedance materials would increase for each material. The theory behind this approach, as well as experimental results are presented.

  3. The impact of general practice attachments on foundation doctors: achieving the goals of Modernising Medical Careers.

    PubMed

    Firth, Adam; Wass, Val

    2011-09-01

    Modernising Medical Careers saw the introduction of four-month attachments in primary care during the second Foundation Year, to foster a broader understanding of healthcare settings. The North West Deanery offered this opportunity to virtually all trainees. Previous work had captured poor impressions of undergraduate experience in general practice. This study aimed to explore Foundation Doctors' perceptions of Foundation primary care attachments before and after the experience. Qualitative methodology was used. Two focus groups were held with 12 trainees at the end of their first Foundation Year to explore their expectations of pending rotation in general practice. Eighteen individual interviews were conducted with Foundation Doctors after the attachment. Themed analysis of transcripts revealed a striking contrast between trainees' perceptions of general practice before and after undertaking F2 rotations. Undergraduate exposure and secondary care bias in training had a significant negative impact on trainees' perceptions of general practice. The one-to-one opportunities for educational supervision, the range of patients seen and the opportunity to understand communication at the primary/secondary interface dispelled these concerns. The findings highlighted the beneficial impact of foundation posts in general practice for training, career planning in general and, as outlined in the initial goals of the programme, the interaction between primary and secondary care.

  4. Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels.

    PubMed

    Cao, Wenquan; Zhang, Mingda; Huang, Chongxiang; Xiao, Shuyang; Dong, Han; Weng, Yuqing

    2017-02-02

    Strength and toughness are a couple of paradox as similar as strength-ductility trade-off in homogenous materials, body-centered-cubic steels in particular. Here we report a simple way to get ultrahigh toughness without sacrificing strength. By simple alloying design and hot rolling the 5Mn3Al steels in ferrite/austenite dual phase temperature region, we obtain a series of ferrite/martensite laminated steels that show up-to 400-450J Charpy V-notch impact energy combined with a tensile strength as high as 1.0-1.2 GPa at room temperature, which is nearly 3-5 times higher than that of conventional low alloy steels at similar strength level. This remarkably enhanced toughness is mainly attributed to the delamination between ferrite and martensite lamellae. The current finding gives us a promising way to produce high strength steel with ultrahigh impact toughness by simple alloying design and hot rolling in industry.

  5. Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels

    PubMed Central

    Cao, Wenquan; Zhang, Mingda; Huang, Chongxiang; Xiao, Shuyang; Dong, Han; Weng, Yuqing

    2017-01-01

    Strength and toughness are a couple of paradox as similar as strength-ductility trade-off in homogenous materials, body-centered-cubic steels in particular. Here we report a simple way to get ultrahigh toughness without sacrificing strength. By simple alloying design and hot rolling the 5Mn3Al steels in ferrite/austenite dual phase temperature region, we obtain a series of ferrite/martensite laminated steels that show up-to 400–450J Charpy V-notch impact energy combined with a tensile strength as high as 1.0–1.2 GPa at room temperature, which is nearly 3–5 times higher than that of conventional low alloy steels at similar strength level. This remarkably enhanced toughness is mainly attributed to the delamination between ferrite and martensite lamellae. The current finding gives us a promising way to produce high strength steel with ultrahigh impact toughness by simple alloying design and hot rolling in industry. PMID:28150692

  6. Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels

    NASA Astrophysics Data System (ADS)

    Cao, Wenquan; Zhang, Mingda; Huang, Chongxiang; Xiao, Shuyang; Dong, Han; Weng, Yuqing

    2017-02-01

    Strength and toughness are a couple of paradox as similar as strength-ductility trade-off in homogenous materials, body-centered-cubic steels in particular. Here we report a simple way to get ultrahigh toughness without sacrificing strength. By simple alloying design and hot rolling the 5Mn3Al steels in ferrite/austenite dual phase temperature region, we obtain a series of ferrite/martensite laminated steels that show up-to 400–450J Charpy V-notch impact energy combined with a tensile strength as high as 1.0–1.2 GPa at room temperature, which is nearly 3–5 times higher than that of conventional low alloy steels at similar strength level. This remarkably enhanced toughness is mainly attributed to the delamination between ferrite and martensite lamellae. The current finding gives us a promising way to produce high strength steel with ultrahigh impact toughness by simple alloying design and hot rolling in industry.

  7. Classroom learning and achievement: how the complexity of classroom interaction impacts students' learning

    NASA Astrophysics Data System (ADS)

    Podschuweit, Sören; Bernholt, Sascha; Brückmann, Maja

    2016-05-01

    Background: Complexity models have provided a suitable framework in various domains to assess students' educational achievement. Complexity is often used as the analytical focus when regarding learning outcomes, i.e. when analyzing written tests or problem-centered interviews. Numerous studies reveal negative correlations between the complexity of a task and the probability of a student solving it. Purpose: Thus far, few detailed investigations explore the importance of complexity in actual classroom lessons. Moreover, the few efforts made so far revealed inconsistencies. Hence, the present study sheds light on the influence the complexity of students' and teachers' class contributions have on students' learning outcomes. Sample: Videos of 10 German 8th grade physics courses covering three consecutive lessons on two topics each (electricity, mechanics) have been analyzed. The sample includes 10 teachers and 290 students. Design and methods: Students' and teachers' verbal contributions were coded manual-based according to the level of complexity. Additionally, pre-post testing of knowledge in electricity and mechanics was applied to assess the students' learning gain. ANOVA analysis was used to characterize the influence of the complexity on the learning gain. Results: Results indicate that the mean level of complexity in classroom contributions explains a large portion of variance in post-test results on class level. Despite this overarching trend, taking classroom activities into account as well reveals even more fine-grained patterns, leading to more specific relations between the complexity in the classroom and students' achievement. Conclusions: In conclusion, we argue for more reflected teaching approaches intended to gradually increase class complexity to foster students' level of competency.

  8. Positive futures? The impact of HIV infection on achieving health, wealth and future planning.

    PubMed

    Harding, Richard; Molloy, Tim

    2008-05-01

    Although HIV is now cast as a chronic condition with favourable clinical outcomes under new treatments, it is unclear how living with HIV affects expectations and planning for the future. This mixed-methods study aimed to investigate UK gay men's expectations of their own future when living with HIV, and to identify the heath and social interventions required to enhance roles, participation and personal fulfilment. A preliminary focus group identified relevant domains of enquiry for a subsequent online cross-sectional survey. A total of 347 gay men living in the UK with HIV participated in the survey, and 56.6% were currently on treatment. However, high 7-day prevalence of psychological and physical symptoms was identified (42.6% in pain, 80.2% worrying); 57.8% perceived reduced career options due to their infection and 71.8% reduced life expectancy. Being on treatment was not significantly associated with perceived life expectancy. Coded open-ended survey data identified eight principle themes related to goal planning and attainment. The integrated open and closed data items offer an understanding of barriers and challenges that focus on poor mental health due to clinical inattention, discrimination and stigma, poor career and job opportunities due to benefit and workplace inflexibility and lack of understanding, a lack of personal goals and associated skills deficit related to confidence and self esteem. Gay men living with HIV require an integrated holistic approach to wellbeing that incorporates clinical, social and individual intervention in order to lead productive lives with maximum benefit from treatment gains.

  9. Impact of maximum levels in European legislation on exposure of mycotoxins in dried products: case of aflatoxin B1 and ochratoxin A in nuts and dried fruits.

    PubMed

    Van de Perre, Evelien; Jacxsens, Liesbeth; Lachat, Carl; El Tahan, Fouad; De Meulenaer, Bruno

    2015-01-01

    In this study the impact of setting European criteria on exposure to aflatoxin B1 via nuts and figs and ochratoxin A via dried fruits is evaluated for the Belgian population, as an example of the European population. Two different scenarios were evaluated. In scenario 1 all collected literature data are considered, assuming that there is no border control nor legal limits in Europe. In the second scenario, contamination levels above the maximum limits are excluded. The results from scenario 1 demonstrated that if no regulation is in place, AFB1 and OTA concentrations reported in the analysed food can have potential health risk to the population. The estimated exposure of OTA for scenario 2 is below the TDI of 5 ng/kg BW⋅day, indicating that OTA concentrations accepted by EU legislation pose a low risk to the Belgian population. For AFB1, the MOE values of scenario 2 are above 10,000 and can be considered to be of low health concern, based on BDML10 for humans, except for figs (MOE = 5782). This means that for all matrices, with exception of figs, the maximum values of AFB1 in the European legislation are sufficient to be of a low health concern for consumers.

  10. The Impact of a Teaching-Learning Program Based on a Brain-Based Learning on the Achievement of the Female Students of 9th Grade in Chemistry

    ERIC Educational Resources Information Center

    Shabatat, Kawthar; Al-Tarawneh, Mohammed

    2016-01-01

    This study aimed at recognizing the impact of teaching-learning program based on a brain-based learning on the achievement of female students of 9th grade in chemistry, to accomplish the goal of this study the researchers designed instruments of: instructional plans, pre achievement and past achievement exams to use them for the study-validity and…

  11. Cluster-randomized trial demonstrating impact on academic achievement of elementary social-emotional learning.

    PubMed

    Schonfeld, David J; Adams, Ryan E; Fredstrom, Bridget K; Weissberg, Roger P; Gilman, Richard; Voyce, Charlene; Tomlin, Ricarda; Speese-Linehan, Dee

    2015-09-01

    This study evaluated the results of a social and emotional learning (SEL) program on academic achievement among students attending a large, urban, high-risk school district. Using a cluster-randomized design, 24 elementary schools were assigned to receive either the intervention curriculum (Promoting Alternative Thinking Strategies, or PATHS) or a curriculum that delivered few if any SEL topics (i.e., the control group). In addition to state mastery test scores, demographic data, school attendance, and dosage information were obtained from 705 students who remained in the same group from the 3rd to the 6th grade. Analyses of odds ratios revealed that students enrolled in the intervention schools demonstrated higher levels of basic proficiency in reading, writing, and math at some grade levels. Although these between-groups differences held for race/ethnicity, gender, and socioeconomic status, significant within-group differences also were noted across these variables. Collectively, these findings indicated that social development instruction may be a promising approach to promote acquisition of academic proficiency, especially among youth attending high-risk school settings. Implications of these findings with respect to SEL programs conclude the article.

  12. Impact of testing styles and testing methods on achievement in general chemistry

    NASA Astrophysics Data System (ADS)

    Howell, Byron Edward

    2001-12-01

    This research conducted at a community college located in Northeast Texas studied testing style and testing methods in relation to achievement in general chemistry. Data was collected and examined from 212 participants. Of these, 143 completed both the MBTI and PEPS surveys. This provided 71 subjects designated as Sensor (S) types for the final phase of the study. The subjects were divided into two groups by performance on the PEPS. One group consisted of subjects that indicated a preference to communicate (test) using a formal/pencil-paper test format (linguistic testing style) and the other subjects indicated a preference to communicate (test) using a hands-on/movement test format (tactile testing style). All subjects were administered both a linguistic and tactile pretest prior to treatment and both a linguistic and tactile posttest after treatment. The data was analyzed using a 2 x 2 ANOVA for significant effects at the p < 0.05 level of confidence. The results indicated a significant interaction effect between the student testing style and test methods. While not conclusive, this study does indicate that the type of testing done in general chemistry may be favoring students with certain types of communication preferences (testing styles). Therefore students with many of the worker characteristics desired by the chemical industry may not be successful in general chemistry and choose a different career path.

  13. The Impact of Interactive Lecture Experiments on Student Academic Achievement, Motivation and Attitudes towards Science (Part II)

    NASA Astrophysics Data System (ADS)

    Milner-Bolotin, Marina M.; Moll, R.; Kotlicki, A.; Bates, F.; Rieger, G.; Nashon, S.

    2006-12-01

    Interactive Lecture Experiments (ILE) have been used in the introductory physics course at the University of British Columbia for over two years. During the Fall of 2006 a systematic study was conducted using the Colorado Learning Attitudes about Science Survey (CLASS), Force Concept Inventory (FCI), physics open-ended exam problems and focus group interviews to determine the impact of ILE on student academic achievement, motivation and attitudes towards physics. Three sections of students (750 students) experienced four ILE experiments. FCI and CLASS were administered twice and academic results for students who experienced the ILE for a particular topic were compared to students, from a different section, who did not complete the ILE for that topic. Qualitative data on students’ attitudes was also collected using open ended survey questions and interviews. Preliminary results will be presented with conclusions about the impact of using ILE as an effective pedagogy in large introductory physics courses.

  14. Impact of a school district's science reform effort on the achievement and attitudes of third- and fourth-grade students

    NASA Astrophysics Data System (ADS)

    Shymansky, James A.; Yore, Larry D.; Anderson, John O.

    2004-10-01

    This article is about one school district's effort to reform its elementary science curriculum through a program of professional development called Science, Parents, Activities and Literature (Science PALs). The differential exposure of the district's K-6 teachers to Science PALs and differences in how well teachers implemented Science PALs-type inquiry strategies allowed us to conduct a quasi-experimental study of the impact of Science PALs on student achievement and attitudes. We measured achievement with an instrument based on items taken from the Third International Mathematics and Science Study (TIMSS; International Association for the Evaluation of Educational Achievement, [1997]) and selected attitudes about science with the Student Perceptions of Classroom Climate (SPOCC; Yore et al., [1998]), an instrument that we designed. Our analyses of student attitude scores as a function of years of teacher participation in Science PALs and supervisor's rating of a teacher's implementation of the project's instructional approaches showed a significant overall positive impact on student attitudes toward school science. Student TIMSS scores on multiple-choice items or constructed-response items did not improve significantly when analyzed by the number of years a student's teacher was involved in the Science PALs effort or by the supervisor's rating of that implementation. We found no significant differences in attitude or achievement scores among students taught by a series of teachers rated high, medium, or low in quality of implementation by the district's science supervisor. We discuss possible explanations for the lack of clear and positive connections between Science PALs and student performance in light of the increased focus on accountability in reform projects.

  15. The National COSEE Network's decade of assisting scientists to achieve high-quality Broader Impacts

    NASA Astrophysics Data System (ADS)

    Hotaling, L. A.; Yoder, J. A.; Scowcroft, G.

    2012-12-01

    Many ocean scientists struggle with defining Broader Impact (BI) activities that will satisfy reviewers or fit within budget and time constraints, and many scientists are uncertain as to how to find assistance in crafting sound BI plans. In 2002, the National Centers for Ocean Sciences Education Excellence (COSEE) Network began engaging and connecting scientists and educators to transform ocean sciences education. COSEE's success in engaging scientists in BI activities is due to the Network's ability to find and create opportunities for education and outreach, assist scientists in designing programs that feature their research, and support scientists with courses, workshops and tools, which assist them in becoming better communicators of their research to non-scientific audiences. Among its most significant accomplishments to date is the development of a network of ocean scientists that is connected to education and outreach professionals, formal K-12 educators and students, informal science professionals, learning sciences experts, and graduate and undergraduate students. In addition to networking, COSEE Centers have developed and implemented the Ocean Literacy Principles and Fundamental Concepts and the Ocean Literacy Scope and Sequence for grades K-12. COSEE has also helped engage scientists with public audiences, facilitating the use of real-time ocean observing systems (OOS) data in formal and informal education settings, creating new distance learning and online resources for ocean sciences education, and promoting high quality ocean sciences education and outreach in universities and formal/informal venues. The purpose of this presentation is to review several tools that the COSEE Network has developed to assist ocean scientists with BI activities and to describe the Network's efforts to prepare young scientists to communicate their research to non-expert audiences.

  16. Quality of Vegetable Oil Prior to Fortification Is an Important Criteria to Achieve a Health Impact

    PubMed Central

    Andarwulan, Nuri; Gitapratiwi, Desty; Laillou, Arnaud; Fitriani, Dwi; Hariyadi, Purwiyatno; Moench-Pfanner, Regina; Martianto, Drajat

    2014-01-01

    Unbranded palm cooking oil has been fortified for several years and can be found in the market with different oxidation levels. This study aimed to investigate the stability and shelf life of unbranded, bulk, vitamin A-fortified palm oils with the most commonly observed oxidation levels in Indonesia. Three types of cooking oils were tested: (i) cooking oil with a peroxide value (PV) below 2 mEq O2/kg (PO1); (ii) cooking oil with a PV around 4 mEq O2/kg (PO2); and (iii) cooking oil with a PV around 9 mEq O2/kg (PO3). The oil shelf life was determined by using accelerated shelf life testing (ASLT), where the product was stored at 60, 75 and 90 °C, and then PV, free fatty acid and vitamin A concentration in the oil samples were measured. The results showed that PO1 had a shelf life of between 2–3 months, while PO2’s shelf life was a few weeks and PO3’s only a few days. Even given those varying shelf lives, the vitamin A loss in the oils was still acceptable, at around 10%. However, the short shelf life of highly oxidized cooking oil, such as PO3, might negatively impact health, due to the potential increase of free radicals of the lipid peroxidation in the oil. Based on the results, the Indonesian government should prohibit the sale of highly-oxidized cooking oil. In addition, government authorities should promote and endorse the fortification of only cooking oil with low peroxide levels to ensure that fortification is not associated with any health issues associated with high oxidation levels of the cooking oil. PMID:25393689

  17. Qualitative research study of high-achieving females' life experiences impacting success

    NASA Astrophysics Data System (ADS)

    Butcher, Ann Patrice

    2003-07-01

    This qualitative study investigated the life experiences of five academically gifted female students in math and science in reflection of their elementary learning prior to enrollment at a prestigious science and mathematics high school. The elite high school limits admission to the state of Illinois' top students. The purpose of this study is to unfold the story of five academically gifted females in attendance at the elite high school reflecting on their life experiences in elementary school that contributed to their current academic success. Twelve female students, who at the time of this study were currently in their senior year (12th grade) of high school, were solicited from the top academic groups who are regarded by their teachers as highly successful in class. Students were selected as part of the study based on academic status, survey completion and interest in study, Caucasian and Asian ethnicity, locale of elementary school with preference given to the variety of school demographics---urban, suburban, and rural---further defined the group to the core group of five. All female participants were personally interviewed and communicated via Internet with the researcher. Parents and teachers completing surveys as well met the methodological requirements of triangulation. An emergent theme of paternal influence came from the research. Implications supported in the research drawn from this study to increase achievement of academically gifted females include: (a) proper early identification of learner strengths plays a role; (b) learning with appropriate intellectual peers is more important than learning with their age group; (c) teachers are the greatest force for excellent instruction; (d) effective teaching strategies include cooperative learning, multi-sensory learning, problem-based learning, and hands-on science; (e) rigor in math is important; (f) gender and stereotypes need not be barriers; (g) outside interests and activities are important for self

  18. Latinas' heritage language as a source of resiliency: impact on academic achievement in STEM fields

    NASA Astrophysics Data System (ADS)

    Stevenson, Alma D.; Gallard Martínez, Alejandro José; Brkich, Katie Lynn; Flores, Belinda Bustos; Claeys, Lorena; Pitts, Wesley

    2017-03-01

    This article highlights how the preservation of heritage languages is essential in the construction of three Georgia Latina participants' cultural identities and the creation of support networks that allow them to develop resiliency and achieve academically. We conceptualize resiliency as a strategy developed by the Latina participants using contextually mitigating factors during their STEM education. The findings presented in this manuscript are part of a larger, ongoing study of Latina resiliency and their paths to success in STEM fields in two states: Georgia and Texas. Following James Spradley's guidelines, data were collected via three separate semi-structured interviews with each participant. Intrinsic, multiple case studies were used to find both commonalities and differences, as well as to deepen our understanding of the role of the participants' heritage language in their development of resiliency in each particular case. The findings presented here were not part of a preconceived research hypothesis, but rather a theme that emerged while analyzing data collected in the state of Georgia. Georgia is not home to a long-established Hispanic/Latino population, but rather is part of the New Latino Diaspora (Wortham, Murillo and Hamann in Education in the new Latino diaspora: policy and the politics of identity. Ablex Publishing, New York, 2002), and therefore local natives do not necessarily perceive Latino immigrants and the Spanish language either as long-standing or permanent features of the state. In fact, in response to the growing diversity of the state during the past generation, Georgia has implemented multiple educational policies hostile toward immigrants and linguistic diversity (Beck and Allexsaht-Snider in Education in the new Latino diaspora: policy and the politics of identity. Ablex Press, Westport, 2002). Our findings suggest that the Latina participants' heritage languages allow them to engage in cultural traditions, encouraged by their

  19. The impact of modality and working memory capacity on achievement in a multimedia environment

    NASA Astrophysics Data System (ADS)

    Stromfors, Charlotte M.

    This study explored the impact of working memory capacity and student learning in a dual modality, multimedia environment titled Visualizing Topography. This computer-based instructional program focused on the basic skills in reading and interpreting topographic maps. Two versions of the program presented the same instructional content but varied the modality of verbal information: the audio-visual condition coordinated topographic maps and narration; the visual-visual condition provided the same topographic maps with readable text. An analysis of covariance procedure was conducted to evaluate the effects due to the two conditions in relation to working memory capacity, controlling for individual differences in spatial visualization and prior knowledge. The scores on the Figural Intersection Test were used to separate subjects into three levels in terms of their measured working memory capacity: low, medium, and high. Subjects accessed Visualizing Topography by way of the Internet and proceeded independently through the program. The program architecture was linear in format. Subjects had a minimum amount of flexibility within each of five segments, but not between segments. One hundred and fifty-one subjects were randomly assigned to either the audio-visual or the visual-visual condition. The average time spent in the program was thirty-one minutes. The results of the ANCOVA revealed a small to moderate modality effect favoring an audio-visual condition. The results also showed that subjects with low and medium working capacity benefited more from the audio-visual condition than the visual-visual condition, while subjects with a high working memory capacity did not benefit from either condition. Although splitting the data reduced group sizes, ANCOVA results by gender suggested that the audio-visual condition favored females with low working memory capacities. The results have implications for designers of educational software, the teachers who select software, and

  20. Semiparametric Estimation of the Impacts of Longitudinal Interventions on Adolescent Obesity using Targeted Maximum-Likelihood: Accessible Estimation with the ltmle Package.

    PubMed

    Decker, Anna L; Hubbard, Alan; Crespi, Catherine M; Seto, Edmund Y W; Wang, May C

    2014-03-01

    While child and adolescent obesity is a serious public health concern, few studies have utilized parameters based on the causal inference literature to examine the potential impacts of early intervention. The purpose of this analysis was to estimate the causal effects of early interventions to improve physical activity and diet during adolescence on body mass index (BMI), a measure of adiposity, using improved techniques. The most widespread statistical method in studies of child and adolescent obesity is multi-variable regression, with the parameter of interest being the coefficient on the variable of interest. This approach does not appropriately adjust for time-dependent confounding, and the modeling assumptions may not always be met. An alternative parameter to estimate is one motivated by the causal inference literature, which can be interpreted as the mean change in the outcome under interventions to set the exposure of interest. The underlying data-generating distribution, upon which the estimator is based, can be estimated via a parametric or semi-parametric approach. Using data from the National Heart, Lung, and Blood Institute Growth and Health Study, a 10-year prospective cohort study of adolescent girls, we estimated the longitudinal impact of physical activity and diet interventions on 10-year BMI z-scores via a parameter motivated by the causal inference literature, using both parametric and semi-parametric estimation approaches. The parameters of interest were estimated with a recently released R package, ltmle, for estimating means based upon general longitudinal treatment regimes. We found that early, sustained intervention on total calories had a greater impact than a physical activity intervention or non-sustained interventions. Multivariable linear regression yielded inflated effect estimates compared to estimates based on targeted maximum-likelihood estimation and data-adaptive super learning. Our analysis demonstrates that sophisticated

  1. Modeling the impact of hepatitis C viral clearance on end-stage liver disease in an HIV co-infected cohort with Targeted Maximum Likelihood Estimation

    PubMed Central

    Schnitzer, Mireille E; Moodie, Erica EM; van der Laan, Mark J; Platt, Robert W; Klein, Marina B

    2013-01-01

    Summary Despite modern effective HIV treatment, hepatitis C virus (HCV) co-infection is associated with a high risk of progression to end-stage liver disease (ESLD) which has emerged as the primary cause of death in this population. Clinical interest lies in determining the impact of clearance of HCV on risk for ESLD. In this case study, we examine whether HCV clearance affects risk of ESLD using data from the multicenter Canadian Co-infection Cohort Study. Complications in this survival analysis arise from the time-dependent nature of the data, the presence of baseline confounders, loss to follow-up, and confounders that change over time, all of which can obscure the causal effect of interest. Additional challenges included non-censoring variable missingness and event sparsity. In order to efficiently estimate the ESLD-free survival probabilities under a specific history of HCV clearance, we demonstrate the doubly-robust and semiparametric efficient method of Targeted Maximum Likelihood Estimation (TMLE). Marginal structural models (MSM) can be used to model the effect of viral clearance (expressed as a hazard ratio) on ESLD-free survival and we demonstrate a way to estimate the parameters of a logistic model for the hazard function with TMLE. We show the theoretical derivation of the efficient influence curves for the parameters of two different MSMs and how they can be used to produce variance approximations for parameter estimates. Finally, the data analysis evaluating the impact of HCV on ESLD was undertaken using multiple imputations to account for the non-monotone missing data. PMID:24571372

  2. How Science, Technology, Engineering, and Mathematics (STEM) Project-Based Learning (PBL) Affects High, Middle, and Low Achievers Differently: The Impact of Student Factors on Achievement

    ERIC Educational Resources Information Center

    Han, Sunyoung; Capraro, Robert; Capraro, Mary Margaret

    2015-01-01

    The purpose of this study was to investigate whether participating in science, technology, engineering, and mathematics (STEM) project-based learning (PBL) activities effected students who had varied performance levels and to what extent students' individual factors influenced their mathematics achievement. STEM PBL has been a critical challenge…

  3. How Does Teacher Qualifications Impact Student Achievement in Relation to the Achievement Model Established by the Mississippi State Department of Education?

    ERIC Educational Resources Information Center

    Holland, Timothy Darren

    2011-01-01

    The following study was conducted in a six-county geographical region and involved teachers from various high schools that taught classes which were involved in the subject area testing program. Each participant taught one of the four state-mandated subject area classes that are tested to determine achievement levels and accreditation ratings for…

  4. Analysis of the impacts of EC-Earth Global Circulation Model in the RCP45 climate change scenario on maximum daily streamflow quantiles at global scale

    NASA Astrophysics Data System (ADS)

    Silvestro, Francesco; Campo, Lorenzo; Rudari, Roberto; Herold, Christian; De Angeli, Silvia; Gabellani, Simone; D'Andrea, Mirko; Rodila, Denisa

    2016-04-01

    Climate changes can have an impact on various components of hydrological cycle. From a risk assessment point of view it is certainly interesting understanding how extreme streamflow values can change as a consequence of climate variability. In order to do this the outputs of a climate model (EC-EARTH) that accounts for a standard climate scenario were used to feed a hydrological model and to generate 140 years (1960-2100) of continuous streamflow simulations in a large number of stations that cover all the world. These time series were then post-processed in order to evaluate how annual daily maximum streamflow quantiles change because of climate scenarios. The analysis highlights that in many cases there is an increment or a decrease of the quantiles for fixed return periods, but only in a reduced number of situations these variation lay out of the confidence intervals of the quantiles estimated in current climate. The analysis was carried out on over 5000 stations distributed in all continents and spanned the period 1960-2100 according to the climate scenario RCP45.

  5. STEAM: A National Study of the Integration of the Arts Into STEM Instruction and its Impact on Student Achievement

    NASA Astrophysics Data System (ADS)

    Rabalais, Mark E.

    The purpose of this study is to examine the relationship between exposure to the arts and performance in Science, Technology, Engineering, and Math (STEM) subjects. STEAM, an integration of arts-based instruction into science and math related fields, is viewed as an alternative to traditional STEM academies. The literature briefly examines the current state of STEM programs and the deficiencies in graduate quality and quantity and the call from employers for a more innovative workforce. Advocates for STEAM argue for arts as a means to improve creativity, collaboration, risk-taking and exploration. Arguments against arts in STEM are grounded in political opinions concerning arts funding and logistical complications of implementing STEAM. However, some schools and STEM programs have embraced the STEAM premise and have begun to integrate arts into the traditional curriculum. The 2009 National Assessment of Educational Progress (NAEP) dataset was utilized to determine a correlation between the number of arts credits earned and mathematics/science achievement. Results from the NAEP dataset indicated a correlation between the amount of arts credits and increased achievement scores in science and math. The same correlation was found when controlling for demographic factors such as gender, race, and socio-economic status (SES). Overall, the arts' greatest impact was on students identified as "at-risk" or underrepresented in STEM fields. Controlling for these variable groups, one can note the quantifiable differences in scores. Overall, findings of the study provide empirical support for the addition of arts in STEM.

  6. Year-Round School versus Traditional School: The Impact of Academic Calendars on Student Achievement at Selected Elementary Schools in North Central South Carolina

    ERIC Educational Resources Information Center

    Lindsay-Brown, Sandra J.

    2010-01-01

    This study examined the impact that a year-round school calendar and a traditional school calendar may have on student achievement at selected elementary schools in North Central South Carolina. Specifically it investigated mean differences in academic achievement between elementary students at two year-round schools versus two traditional…

  7. The Impact of Socioeconomic Status on Achievement of High School Students Participating in a One-to-One Laptop Computer Program

    ERIC Educational Resources Information Center

    Weers, Anthony J.

    2012-01-01

    The purpose of this study was to determine the impact of socioeconomic status on the achievement of high school students participating in a one-to-one laptop computer program. Students living in poverty struggle to achieve in schools across the country, educators must address this issue. The independent variable in this study is socioeconomic…

  8. An Examination of the Impact That Selected School Characteristics Have on the Academic Achievement of Students Attending High Schools in South Carolina

    ERIC Educational Resources Information Center

    McCord, Gregory A.

    2014-01-01

    The impact of school locale, size and poverty levels (SES) on student achievement has been of great interest in school research for more than the last five decades. The increasing public demand to hold schools accountable for their effects on student outcomes lends urgency to the task of exploring variables related to student achievement that are…

  9. WWC Quick Review of the Article "Impact of For-Profit and Nonprofit Management on Student Achievement: The Philadelphia Intervention, 2002-2008"

    ERIC Educational Resources Information Center

    What Works Clearinghouse, 2010

    2010-01-01

    "Impact of For-Profit and Nonprofit Management on Student Achievement: The Philadelphia Intervention, 2002-2008" examined whether shifting from traditional district management to management by a for-profit or nonprofit organization improves student achievement. The study analyzed data on six cohorts of elementary and middle school…

  10. The Impact of a School-Based Enterprise Program on the Achievement and Behavior of Special Education Students Attending High Schools in South Carolina

    ERIC Educational Resources Information Center

    Pilot, Grover Cleve

    2011-01-01

    Our nation's K-12 schools are faced with numerous critical challenges that affect student achievement and consequently impact society. Key challenges, such as elevating academic achievement, meeting state and No Child Left Behind (NCLB) standards, high dropout rates, at-risk students, parental involvement, and the recruitment and retention of…

  11. The Impact of the Social, Academic, and Moral Development Programs of an Achievable Dream on Students during Their College and University Experience

    ERIC Educational Resources Information Center

    Runge, Amy L.

    2016-01-01

    This evaluation case study explores the impact of the An Achievable Dream social, academic, and moral program on college student's performance in college. Through this study, the researcher was able to provide insight on college student and college student advocates perceptions of An Achievable Dream's social, academic, and moral program's impact…

  12. Differential Impacts of Intensive District-Level Technical Assistance on Student Achievement: A Study of California's District Assistance and Intervention Teams

    ERIC Educational Resources Information Center

    Strunk, Katharine O.; McEachin, Andrew

    2012-01-01

    Building on Strunk, McEachin, and Westover (2011), the authors examine whether or not District Assistance and Intervention Teams (DAITs) have a differential impact on student performance across school and student characteristics. They use a quasi-experimental design to examine the impacts of DAITs on student achievement on math and English…

  13. The Impact of a State Takeover on Academic Achievement, School Performance, and School Leadership in a Rural South Carolina School District

    ERIC Educational Resources Information Center

    Bishop, Janice Zissette

    2009-01-01

    This case study on the impact of a state takeover in one of South Carolina's most rural school districts ("referred to as the County School District") was completed using a quasi-experimental mixed methods design to examine the impact on academic achievement, school performance, and school leadership as a result of the South Carolina…

  14. Considering the Sociolinguistic Impact of Instability of Educational Philosophy on Reading Achievement of Students Who Are Deaf and Hard of Hearing

    ERIC Educational Resources Information Center

    Edwards, Sandra G.

    2012-01-01

    The purpose of this study was to consider the sociolinguistic impact of philosophical instability on reading comprehension achievement of students who are deaf and hard of hearing at a state school for the deaf. The research conducted examined the sociolinguistic impact by investigating the following: (1) what non-malleable factors influenced…

  15. The Integration of Mathematics in Middle School Science: Student and Teacher Impacts Related to Science Achievement and Attitudes Towards Integration

    NASA Astrophysics Data System (ADS)

    McHugh, Luisa

    Contemporary research has suggested that in order for students to compete globally in the 21st century workplace, pedagogy must shift to include the integration of science and mathematics, where teachers effectively incorporate the two disciplines seamlessly. Mathematics facilitates a deeper understanding of science concepts and has been linked to improved student perception of the integration of science and mathematics. Although there is adequate literature to substantiate students' positive responses to integration in terms of attitudes, there has been little empirical data to support significant academic improvement when both disciplines are taught in an integrated method. This research study, conducted at several school districts on Long Island and New York City, New York, examined teachers' attitudes toward integration and students' attitudes about, and achievement on assessments in, an integrated 8th grade science classroom compared to students in a non-integrated classroom. An examination of these parameters was conducted to analyze the impact of the sizeable investment of time and resources needed to teach an integrated curriculum effectively. These resources included substantial teacher training, planning time, collaboration with colleagues, and administration of student assessments. The findings suggest that students had positive outcomes associated with experiencing an integrated science and mathematics curriculum, though these were only weakly correlated with teacher confidence in implementing the integrated model successfully. The positive outcomes included the ability of students to understand scientific concepts within a concrete mathematical framework, improved confidence in applying mathematics to scientific ideas, and increased agreement with the usefulness of mathematics in interpreting science concepts. Implications of these research findings may be of benefit to educators and policymakers looking to adapt integrated curricula in order to

  16. Volumetric-modulated arc stereotactic body radiotherapy for prostate cancer: dosimetric impact of an increased near-maximum target dose and of a rectal spacer

    PubMed Central

    Naccarato, Stefania; Stavrev, Pavel; Stavreva, Nadejda; Fersino, Sergio; Giaj Levra, Niccolò; Mazzola, Rosario; Mancosu, Pietro; Scorsetti, Marta; Alongi, Filippo

    2015-01-01

    Objective: In volumetric-modulated arc therapy (VMAT) prostate stereotactic body radiotherapy (SBRT), dose coverage of the planning target volume (PTV) becomes challenging when the sparing of rectum, bladder and urethra is strictly pursued. Our current 35-Gy-in-five-fraction plans only assure 33.2 Gy to ≥95% PTV (V33.2PTV ≥ 95%). Looking for an improved V33.2PTV, increased near-maximum target dose (D2%) and prostate–rectum spacer insertion were tested. Methods: For 11 patients, two VMAT plans, with D2% ≤ 37.5 Gy (Hom) or D2% ≤ 40.2 Gy (Het), on each of two CT studies, before or after spacer insertion, were computed. All plans assured V33.2PTV ≥95%, and <1 cm3 of rectum, bladder and urethra receiving ≥35 Gy. By hypothesis testing, several dose–volume metrics for target coverage and rectal sparing were compared across the four groups of plans. The impact of spacer insertion on the fractions of rectum receiving more than 18, 28 and 32 Gy (VXr) was further tested by linear correlation analysis. Results: By hypothesis testing, the increased D2% was associated with improvements in target coverage, whereas spacer insertion was associated with improvements in both target coverage and rectal VXr. By linear correlation analysis, spacer insertion was related to the reductions in rectal VXr for X ≥ 28 Gy. Conclusion: A slightly increased D2% or the use of spacer insertion was each able to improve V33.2PTV. Their combined use assured V33.2PTV ≥ 98% to all our patients. Spacer insertion was further causative for improvements in rectal sparing. Advances in knowledge: For VMAT plans in prostate SBRT, the distinct dosimetric usefulness of increased D2% and of the use of spacer insertion were validated in terms of target coverage and rectal sparing. PMID:26235142

  17. The Impact of Coteaching on Regular Education Eighth Grade Student Achievement on a Basic Skills Algebra Assessment

    ERIC Educational Resources Information Center

    Rigdon, Misty B.

    2010-01-01

    Coteaching strategies have been implemented in many of the inclusion math classrooms in an attempt to improve the achievement of students. Math achievement continues to be a concern as reported by the National Mathematics Advisory Council in 2007. Educators and previous research reported that coteaching does not improve student achievement. The…

  18. The Impact of Achieve3000 on Elementary Literacy Outcomes: Evidence from a Two-Year Randomized Control Trial

    ERIC Educational Resources Information Center

    Hill, Darryl V.; Lenard, Matthew A.; Page, Lindsay Coleman

    2016-01-01

    School districts are increasingly adopting technology-based resources in an attempt to improve student achievement. This paper reports the two-year results from randomized control trial of Achieve3000 in the Wake County Public School System (WCPSS) in Raleigh, North Carolina. Achieve3000 is an early literacy program that differentiates non-fiction…

  19. The Impact of Internet Virtual Physics Laboratory Instruction on the Achievement in Physics, Science Process Skills and Computer Attitudes of 10th-Grade Students

    NASA Astrophysics Data System (ADS)

    Yang, Kun-Yuan; Heh, Jia-Sheng

    2007-10-01

    The purpose of this study was to investigate and compare the impact of Internet Virtual Physics Laboratory (IVPL) instruction with traditional laboratory instruction in physics academic achievement, performance of science process skills, and computer attitudes of tenth grade students. One-hundred and fifty students from four classes at one private senior high school in Taoyuan Country, Taiwan, R.O.C. were sampled. All four classes contained 75 students who were equally divided into an experimental group and a control group. The pre-test results indicated that the students' entry-level physics academic achievement, science process skills, and computer attitudes were equal for both groups. On the post-test, the experimental group achieved significantly higher mean scores in physics academic achievement and science process skills. There was no significant difference in computer attitudes between the groups. We concluded that the IVPL had potential to help tenth graders improve their physics academic achievement and science process skills.

  20. The Impact of a Cooperative Learning Program on the Academic Achievement in Mathematics and Language in Fourth Grade Students and Its Relation to Cognitive Style

    ERIC Educational Resources Information Center

    Vega, Mery Luz; Hederich M., Christian

    2015-01-01

    This study is expected to determine the impact of a program based on the cooperative learning methodology. This, in comparison to a traditional learning situation in both mathematics and language achievement. The study was carried out on a group of fourth grade students of primary school. In addition, it tried to find the differential impact…

  1. Exploring the Causal Impact of the McREL Balanced Leadership Program on Leadership, Principal Efficacy, Instructional Climate, Educator Turnover, and Student Achievement

    ERIC Educational Resources Information Center

    Jacob, Robin; Goddard, Roger; Kim, Minjung; Miller, Robert; Goddard, Yvonne

    2015-01-01

    This study uses a randomized design to assess the impact of the Balanced Leadership program on principal leadership, instructional climate, principal efficacy, staff turnover, and student achievement in a sample of rural northern Michigan schools. Participating principals report feeling more efficacious, using more effective leadership practices,…

  2. The Impacts of Success for All on Reading Achievement in Grades 3-5: Does Intervening during the Later Elementary Grades Produce the Same Benefits as Intervening Early?

    ERIC Educational Resources Information Center

    Hanselman, Paul; Borman, Geoffrey D.

    2013-01-01

    We evaluate the impact of Success for All literacy instruction in grades 3 through 5 using data from the same cluster randomized trial used to evaluate effects in the earlier grades (K-2). In contrast to the early benefits, there is no effect on reading achievement in the later grades, either overall or for students and schools with high or low…

  3. The Impact of Academic Self-Concept, Expectations and the Choice of Learning Strategy on Academic Achievement: The Case of Business Students

    ERIC Educational Resources Information Center

    Rodriguez, Carlos M.

    2009-01-01

    This study provides evidence of the impact of two critical self-regulation components--academic self-concept and outcome expectations--on the selection of learning strategies conducive to academic achievement in undergraduate business education. Self-concept theory is the framework for the analysis of students' motivations and learning behaviors.…

  4. The Impact of Internet Virtual Physics Laboratory Instruction on the Achievement in Physics, Science Process Skills and Computer Attitudes of 10th-Grade Students

    ERIC Educational Resources Information Center

    Yang, Kun-Yuan; Heh, Jia-Sheng

    2007-01-01

    The purpose of this study was to investigate and compare the impact of Internet Virtual Physics Laboratory (IVPL) instruction with traditional laboratory instruction in physics academic achievement, performance of science process skills, and computer attitudes of tenth grade students. One-hundred and fifty students from four classes at one private…

  5. The Impact of Asynchronous Computer-Assisted Language Learning Approaches on English as a Foreign Language High and Low Achievers' Vocabulary Retention and Recall

    ERIC Educational Resources Information Center

    Gorjian, Bahman; Moosavinia, Seyyed Rahim; Kavari, Kamal Ebrahimi; Asgari, Parviz; Hydarei, Alireza

    2011-01-01

    This study measured the impact of asynchronous computer-assisted language learning (CALL) approaches on high and low achievers' vocabulary retention and recall of English as foreign language learners. Fifty participants were assigned into two homogeneous groups. Both groups covered eight expository passages, which included "Select readings:…

  6. Examining the Impact of Online Labeling on Tutoring Behavior and Its Effect on the English Learning and Motivation of Low-Achieving University Students

    ERIC Educational Resources Information Center

    Wu, Ejean; Yang, Shu Ching

    2016-01-01

    This study examines the differential impact of tutor labeling vs. non-labeling approaches on the performance; motivation beliefs; and cognitive, social, and teaching presence of low-achieving students. Two interactive tutoring strategy patterns are investigated based on the taxonomical e-moderating model of Salmon. In addition, the tutees' online…

  7. Revisiting the Impact of NCLB High-Stakes School Accountability, Capacity, and Resources: State NAEP 1990-2009 Reading and Math Achievement Gaps and Trends

    ERIC Educational Resources Information Center

    Lee, Jaekyung; Reeves, Todd

    2012-01-01

    This study examines the impact of high-stakes school accountability, capacity, and resources under NCLB on reading and math achievement outcomes through comparative interrupted time-series analyses of 1990-2009 NAEP state assessment data. Through hierarchical linear modeling latent variable regression with inverse probability of treatment…

  8. Impact of Attitudinal Adaptation on Academic Achievement among Students: A Comparative Study of Boys and Girls in Boarding Secondary Schools in Meru County, Kenya

    ERIC Educational Resources Information Center

    Murithi, Grace Gatune; Nyaga, Veronica Karimi; Barchok, Hillary K.

    2015-01-01

    This study sought to examine the impact of attitudinal adaptation on academic achievement among boys and girls in boarding secondary schools in Meru County in Kenya. The descriptive survey research design was adapted for the study whose sample size was 384 students, school counsellors and deputy principals in the boarding secondary schools. The…

  9. Working Together to Achieve Greater Impact: The Donors' Education Collaborative of New York City. Principles for Effective Education Grantmaking. Case in Brief Number 3

    ERIC Educational Resources Information Center

    Grantmakers for Education, 2012

    2012-01-01

    Since the mid-1990s, constituency building and advocacy for better public education have grown steadily in New York City. "Working Together to Achieve Greater Impact" explores how that growth was fueled by the Donors' Education Collaborative of New York, which pools its members' financial resources and expertise to advance shared…

  10. A Qualitative Study: The Impact of Selected Non-Cognitive Variables on the Academic Success and Achievement of Culturally Diverse Academic Scholarship Students

    ERIC Educational Resources Information Center

    Wilson, Linda Louise

    2009-01-01

    The study examined whether select non-cognitive variables such as, (Sedlacek, 1989, 1991, 1993, 2004; Tracey & Sedlacek 1984, 1985, 1987, 1989) impacted the academic achievement, retention and graduation rates of culturally diverse academic scholarship students at a predominantly white higher education institutions. The subjects of the study…

  11. Teacher Collaboration in Music Education: The Impact of the DuFour Model on Music Teachers' Attitudes and Their Students' Achievement

    ERIC Educational Resources Information Center

    Armstrong, Cathryn M.

    2010-01-01

    The DuFour PLC model is one of several reforms today based on the theory that organizing teachers into learning communities will promote professional collaboration and collegial relationships which will improve teacher skills, motivation, and increase student achievement. A small number of studies have explored the impact of PLC's on teaching…

  12. The Impact of Online or F2F Lecture Choice on Student Achievement and Engagement in a Large Lecture-Based Science Course: Closing the Gap

    ERIC Educational Resources Information Center

    Murphy, Cheryl A.; Stewart, John C.

    2015-01-01

    Blended learning options vary and universities are exploring an assortment of instructional combinations, some involving video lectures as a replacement for face-to-face (f2f) lectures. This methodological study investigates the impact of the provision of lecture choice (online or f2f) on overall student achievement and course engagement. This…

  13. The Impact of Whole-Faculty Study Groups on Student Achievement and Teacher Practices in Grades K-3 of a Nebraska School District: A Mixed Method Case Study

    ERIC Educational Resources Information Center

    Wendell, Cynthia F.

    2010-01-01

    The purpose of this study was to examine the impact of Whole Faculty Study Groups on student achievement and teacher practices in grades K-3 of a Nebraska school district. Whole-Faculty Study Groups (WFSG) are a type of professional learning community (PLC). Using a mixed method approach, both K-3 student scores on Dynamic Indicators of Basic…

  14. An Exploratory Study of the Impact of the Rural Ugandan Village Library and Other Factors on the Academic Achievement of Secondary School Students

    ERIC Educational Resources Information Center

    Dent, Valeda Frances

    2012-01-01

    This study used archival data to explore the impact of the rural village library and other factors on the academic achievement of secondary school students in the Ugandan village of Kitengesa, and related these findings to rural library development currently taking place in Uganda and other African countries such as Burkina Faso and Ghana. A…

  15. Impact of STS (Context-Based Type of Teaching) in Comparison with a Textbook Approach on Attitudes and Achievement in Community College Chemistry Classrooms

    ERIC Educational Resources Information Center

    Perkins, Gita

    2011-01-01

    The purpose of this study was to analyze the impact of a context-based teaching approach (STS) versus a more traditional textbook approach on the attitudes and achievement of community college chemistry students. In studying attitudes toward chemistry within this study, I used a 30-item Likert scale in order to study the importance of chemistry in…

  16. Impact of Violation of the Missing-at-Random Assumption on Full-Information Maximum Likelihood Method in Multidimensional Adaptive Testing

    ERIC Educational Resources Information Center

    Han, Kyung T.; Guo, Fanmin

    2014-01-01

    The full-information maximum likelihood (FIML) method makes it possible to estimate and analyze structural equation models (SEM) even when data are partially missing, enabling incomplete data to contribute to model estimation. The cornerstone of FIML is the missing-at-random (MAR) assumption. In (unidimensional) computerized adaptive testing…

  17. The Impact of the Brazosport Model on English Language Learners' Reading Achievement in Grades 3-5

    ERIC Educational Resources Information Center

    Garcia, Debra Ann N.

    2012-01-01

    The general purpose of this study was to determine if the implementation of the Brazosport Model improves student reading achievement as determined by Arizona's Instrument to Measure Standards (AIMS). In particular, this study examined the implementation of the Brazosport Model and its effect on the achievement of English Language Learners (ELLs)…

  18. Comparing the Impacts of Tutorial and Edutainment Software Programs on Students' Achievements, Misconceptions, and Attitudes towards Biology

    ERIC Educational Resources Information Center

    Kara, Yilmaz; Yesilyurt, Selami

    2008-01-01

    The purpose of this study was to investigate the effects of tutorial and edutainment design of instructional software programs related to the "cell division" topic on student achievements, misconceptions and attitudes. An experimental research design including the cell division achievement test (CAT), the cell division concept test (CCT) and…

  19. An Analysis of the Impact of Demographic, Structural, Student, and Financial Factors on Texas High School Mathematics Achievement

    ERIC Educational Resources Information Center

    Carter, Alisa

    2013-01-01

    The purpose of this study was to examine the relationships of demographic (indicators describing student characteristics), structural (indicators describing school characteristics), student (indicators of student academic achievement), and financial (indicators of instructional expenditures) factors to student mathematics achievement. A sample (n…

  20. Impact of a proposed change in the maximum permissible dose limit for neutrons to radiation-protection programs at DOE facilities

    SciTech Connect

    Murphy, B.L.

    1981-09-01

    The National Council on Radiation Protection and Measurements (NCRP) has issued a statement advising that it is considering lowering the maximum permissible dose for neutrons. This action would present substantive problems to radiation protection programs at DOE facilities where a potential for neutron exposure exists. In addition to altering administrative controls, a lowering of the maximum permissible dose for neutrons will require advances in personnel neutron dosimetry systems, and neutron detection and measurement instrumentation. Improvement in the characterization of neutron fields and spectra at work locations will also be needed. DOE has initiated research and development programs in these areas. However, problems related to the control of personnel neutron exposure have yet to be resolved and investigators are encouraged to continue collaboration with both United States and international authorities.

  1. The impact of informative tutoring feedback and self-efficacy on motivation and achievement in concept learning.

    PubMed

    Narciss, Susanne

    2004-01-01

    Informative tutoring feedback (ITF) provides assisted multiple response tries by offering strategically useful information for task completion as opposed to simply offering the solution. Previous studies on ITF focused on its effects on achievement. The present studies examine the assumption that ITF affects not only achievement, but also motivational variables such as task engagement, effort, persistence, and satisfaction with performance. In two experiments, students differing in self efficacy (SE) for identifying concepts worked on concept identification tasks. In cases of incorrect hypothesis about the concept, they received either outcome feedback or ITF. Results reveal that motivation and achievement depend on both SE and type of feedback. Future research should examine in more detail how ITF affects the self-enhancing processes between on-task motivation, achievement, and self-evaluation.

  2. Multiculturalism as a dimension of school climate: the impact on the academic achievement of Asian American and Hispanic youth.

    PubMed

    Chang, Janet; Le, Thao N

    2010-10-01

    Multiculturalism constitutes an important element of school climate, but the relation between perceived multiculturalism and academic achievement has not been widely studied. This study examined the influence of students' perceptions of school support for multiculturalism on academic achievement among 280 Asian American and Hispanic youth, including ethnic identity and ethnocultural empathy as potential mediators. Results of structural equation modeling revealed that perceived multiculturalism was significantly positively related to ethnocultural empathy for Asian Americans and Hispanics, and that ethnocultural empathy, in turn, was predictive of academic achievement for Hispanics only. Results of bootstrapping to test for mediation effects revealed ethnocultural empathy to be a salient mediator for Hispanic youth. Although ethnic identity did not mediate the link between multiculturalism and academic achievement, ethnic identity was significantly predictive of achievement for Hispanics. On the whole, these findings suggest that fostering a school climate supportive of multiculturalism may improve empathy toward ethnic out-groups. Furthermore, schools that promote compassion and tolerance for diverse ethnic groups may achieve better academic outcomes among Hispanic youth.

  3. Impact of achievement of complete cytogenetic response on outcome in patients with myelodysplastic syndromes treated with hypomethylating agents.

    PubMed

    Jabbour, Elias; Strati, Paolo; Cabrero, Monica; O'Brien, Susan; Ravandi, Farhad; Bueso-Ramos, Carlos; Wei, Qiao; Hu, Jianhua; Abi Aad, Simon; Short, Nicholas J; Dinardo, Courtney; Daver, Naval; Kadia, Tapan; Wierda, William; Wei, Yue; Colla, Simona; Borthakur, Gautam; Cortes, Jorge; Estrov, Zeev; Kantarjian, Hagop; Garcia-Manero, Guillermo

    2017-04-01

    Two hundred and sixteen consecutive patients with MDS and abnormal karyotype treated with hypomethylating agents between 4/04 and 10/12 were reviewed. Median follow-up was 17 months. Using IWG criteria, best responses were complete response (CR) in 79 patients (37%), partial response (PR) in 4 (2%), and hematologic improvement (HI) in 10 (5%). Cytogenetic response (CyR) was achieved in 78 patients (36%): complete (CCyR) in 62 (29%) and partial in 16 (7%). CyR was achieved in 48 of 79 patients (61%) with CR, 1 of 14 (7%) with PR/HI, and in 29 of the 123 (24%) with no morphologic response. Median overall survival (OS) and leukemia-free survival (LFS) for patients with and without CCyR were 21 and 13 months (P = .007), and 16 and 9 months (P = .001), respectively. By multivariate analysis, the achievement of CCyR was predictive for better OS (HR = 2.1; P < .001). In conclusion, CyR occurs at a rate of 36% (complete in 29%) in patients with MDS treated with HMA and is not always associated with morphological response. The achievement of CCyR is associated with survival improvement and constitutes a major predictive factor for outcome particularly in patients without morphologic response. Therefore, the achievement of CCyR should be considered a milestone in the management of patients with MDS.

  4. The impact of the healthy schools program on reading, mathematics, and science achievement of 5th grade students: A causal-comparative inquiry

    NASA Astrophysics Data System (ADS)

    Barrera, Christina Lynn

    The obesity rate for children has become a national epidemic in America, resulting in the need to incorporate physical fitness and nutrition into the curriculum in an effort to improve health and academic achievement. The Healthy Schools Program (HSP) is an initiative that assists schools in establishing and sustaining healthy environments, which can be instrumental in making students perform better in school. Therefore, the purpose of the study was to examine the impact of the HSP on academic achievement. (Abstract shortened by ProQuest.).

  5. Comparing the Impacts of Tutorial and Edutainment Software Programs on Students' Achievements, Misconceptions, and Attitudes towards Biology

    NASA Astrophysics Data System (ADS)

    Kara, Yılmaz; Yeşilyurt, Selami

    2008-02-01

    The purpose of this study was to investigate the effects of tutorial and edutainment design of instructional software programs related to the "cell division" topic on student achievements, misconceptions and attitudes. An experimental research design including the cell division achievement test (CAT), the cell division concept test (CCT) and biology attitude scale (BAS) was applied at the beginning and at the end of the research. After the treatment, general achievement in CAT increased in favor of experimental groups. Instructional software programs also had the positive effect to the awareness of students' understandings to the general functions of mitosis and meiosis. However, the current study revealed that there were still some misconceptions in the experimental groups even after the treatment. It was also noticed that only using edutainment software program significantly changed students' attitudes towards biology.

  6. Adjusting skewness and maximum 0.5 hour intensity in CLIGEN to improve extreme event and sub-daily intensity generation for assessing climate change impacts

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Both measured data and GCM/RCM projections show an general increasing trend in extreme rainfall events as temperature rises in US. Proper simulation of extreme events is particularly important for assessing climate change impacts on soil erosion and hydrology. The objective of this paper is to fin...

  7. Aspects of science engagement, student background, and school characteristics: Impacts on science achievement of U.S. students

    NASA Astrophysics Data System (ADS)

    Grabau, Larry J.

    Science achievement of U.S. students has lagged significantly behind other nations; educational reformers have suggested science engagement may enhance this critical measure. The 2006 Program for International Student Assessment (PISA) was science-focused and measured science achievement along with nine aspects of science engagement: science self-efficacy, science self-concept, enjoyment of science, general interest in learning science, instrumental motivation for science, future-oriented science motivation, general value of science, personal value of science, and science-related activities. I used multilevel modeling techniques to address both aspects of science engagement and science achievement as outcome variables in the context of student background and school characteristics. Treating aspects of science engagement as outcome variables provided tests for approaches for their enhancement; meanwhile, treating science achievement as the outcome variable provided tests for the influence of the aspects of science engagement on science achievement under appropriate controls. When aspects of science engagement were treated as outcome variables, gender and father's SES had frequent (significant) influences, as did science teaching strategies which focused on applications or models and hands-on activities over-and-above influences of student background and other school characteristics. When science achievement was treated as the outcome variable, each aspect of science engagement was significant, and eight had medium or large effect sizes (future-oriented science motivation was the exception). The science teaching strategy which involved hands-on activities frequently enhanced science achievement over-and-above influences of student background and other school characteristics. Policy recommendations for U.S. science educators included enhancing eight aspects of science engagement and implementing two specific science teaching strategies (focus on applications or models

  8. A Multi-Model Framework to Achieve Consistent Evaluation of Climate Change Impacts in the United States

    NASA Astrophysics Data System (ADS)

    Sarofim, M. C.; Martinich, J.; Waldhoff, S.; DeAngelo, B. J.; McFarland, J.; Jantarasami, L.; Shouse, K.; Crimmins, A.; Li, J.

    2014-12-01

    The Climate Change Impacts and Risk Analysis (CIRA) project establishes a new multi-model framework to systematically assess the physical impacts, economic damages, and risks from climate change. The primary goal of this framework is to estimate the degree to which climate change impacts and damages in the United States are avoided or reduced in the 21st century under multiple greenhouse gas (GHG) emissions mitigation scenarios. The first phase of the CIRA project is a modeling exercise that included two integrated assessment models and 15 sectoral models encompassing five broad impacts sectors: water resources, electric power, infrastructure, human health, and ecosystems. Three consistent socioeconomic and climate scenarios are used to analyze the benefits of global GHG mitigation targets: a reference scenario and two policy scenarios with total radiative forcing targets in 2100 of 4.5 W/m2 and 3.7 W/m2. In this exercise, the implications of key uncertainties are explored, including climate sensitivity, climate model, natural variability, and model structures and parameters. This presentation describes the motivations and goals of the CIRA project; the design and academic contribution of the first CIRA modeling exercise; and briefly summarizes several papers published in a special issue of Climatic Change. The results across impact sectors show that GHG mitigation provides benefits to the United States that increase over time, the effects of climate change can be strongly influenced by near-term policy choices, adaptation can reduce net damages, and impacts exhibit spatial and temporal patterns that may inform mitigation and adaptation policy discussions.

  9. The Impact of Every Classroom, Every Day on High School Student Achievement: Results from a School-Randomized Trial

    ERIC Educational Resources Information Center

    Early, Diane M.; Berg, Juliette K.; Alicea, Stacey; Si, Yajuan; Aber, J. Lawrence; Ryan, Richard M.; Deci, Edward L.

    2016-01-01

    Every Classroom, Every Day (ECED) is a set of instructional improvement interventions designed to increase student achievement in math and English/language arts (ELA). ECED includes three primary components: (a) systematic classroom observations by school leaders, (b) intensive professional development and support for math teachers and…

  10. The Impact of Chess Instruction on the Critical Thinking Ability and Mathematical Achievement of Developmental Mathematics Students

    ERIC Educational Resources Information Center

    Berkley, Darrin K.

    2012-01-01

    This sequential explanatory mixed-methods study determined whether the game of chess can be used as an educational tool to improve critical thinking skills of developmental mathematics students and improve mathematics achievement for these students. Five research questions were investigated. These questions were as follows: (a) Is there a…

  11. The Relationship between Gender, Ethnicity, and Technology on the Impact of Mathematics Achievement in an After-School Program

    ERIC Educational Resources Information Center

    Huang, Xudong; Craig, Scotty D.; Xie, Jun; Graesser, Arthur C.; Okwumabua, Theresa; Cheney, Kyle R.; Hu, Xiangen

    2013-01-01

    The gap among ethnicities and gender in mathematics achievement is a well-known problem. While the gap has been shrinking over the past three decades, it has not completely diminished (Jencks & Phillips, 1998; McGraw, Lubienski, & Strutchens, 2006). The ALEKS, Assessment and LEarning in Knowledge Spaces, tutoring system is one promising…

  12. Cognitive, Affective, and Meta-Cognitive Skill Development through Instrumental Music: A Positive Impact on Academic Achievement

    ERIC Educational Resources Information Center

    Hollenbeck, Lisa

    2008-01-01

    This study explored the skills students develop through participation in instrumental music and the effect it has on their academic achievement through student and parent/guardian surveys. Fifty-eight percent of cognitive skills were identified as being obtained by a majority of students, 70% of affective skills, and 71% of meta-cognitive skills…

  13. The Differential Impact of Academic Self-Regulatory Methods on Academic Achievement among University Students with and without Learning Disabilities.

    ERIC Educational Resources Information Center

    Ruban, Lilia M.; McCoach, D. Betsy; McGuire, Joan M.; Reis, Sally M.

    2003-01-01

    A study involving university students with (n=53) and without (n=417) learning disabilities (LD) found students with LD differed significantly in the relationships between their motivation for and use of standard self-regulated learning and compensation strategies, which provided a differential explanation of academic achievement for students with…

  14. The Impact of Teacher Classroom Practices on Student Achievement during the Implementation of a Reform-Based Chemistry Curriculum

    ERIC Educational Resources Information Center

    Roehrig, Gillian; Garrow, Shauna

    2007-01-01

    Evidence of a gap in student understanding has been well documented in chemistry: the typical student holds an abundance of misconceptions. The current expectation is that educational reform will foster greater student achievement via inquiry teaching within classrooms. Using assessments involving both conceptual and algorithmic knowledge of gas…

  15. Examining the Early Impacts of the Leading Educators Fellowship on Student Achievement and Teacher Retention. Research Report

    ERIC Educational Resources Information Center

    Mihaly, Kata; Master, Benjamin K.; Yoon, Cate

    2015-01-01

    The Leading Educators Fellowship program selects promising mid-career teachers through a competitive application process and develops their skills as leaders of school improvement efforts. The specific objectives of the program are to (1) increase the leadership skills and capacity of teacher leaders in order to improve student achievement in…

  16. Impact of the Systemic Approach on Literacy Achievement of Jordanian 1st Graders at Mu'tah University Model School

    ERIC Educational Resources Information Center

    Al-Hajaya, Nail

    2012-01-01

    This study investigates the effect of the systemic approach in literacy achievement of the first grade students at Mu'tah University's Model School. The sample (N = 45) consisted of all first grade students, who were assigned into two groups; a control group taught traditionally while the other group was exposed to the system approach during the…

  17. Impact of the Child Development Program on Reading Achievement of Kindergarten through Eighth Grade Students in an Urban School District

    ERIC Educational Resources Information Center

    Lynch, Tai E.

    2013-01-01

    Educational leaders are charged with making informed decisions regarding various aspects of schooling that affect the overall achievement of students. Numerous legislative ideas, funding initiatives, programming standards, and practicing guidelines for early childhood education programs have been introduced (Buyssee & Wesley, 2006). Early care…

  18. The Impact of Cooperative Learning on Developing the Sixth Grade Students Decision-Making Skill and Academic Achievement

    ERIC Educational Resources Information Center

    Asha, Intisar K.; Al Hawi, Asma M.

    2016-01-01

    This study aimed at investigating the effect of cooperative learning on developing the sixth graders' decision making skill and their academic achievement. The study sample, which was selected randomly, consisted of (46) students and divided into two groups: the experimental group that taught using the cooperative learning strategy and the control…

  19. The Relationship between Weather and Lunar Changes on Student Achievement and Measures School Districts Utilize to Combat Potential Impact

    ERIC Educational Resources Information Center

    Stuart, Kendra

    2013-01-01

    Classroom disruptions present an obstacle to raising student achievement for teachers and school administrators. This study was designed to investigate potential relationships between weather, specifically barometric pressure, or the lunar cycle, and whether either had a direct correlation with student discipline referrals. The intent was to…

  20. The Impact of Racial Identity and Consciousness Development of African American Male Academic Achievement: Implications for Counseling

    ERIC Educational Resources Information Center

    Whiteside, Dora

    2007-01-01

    The purpose of this study was to examine the effect of racial identity/consciousness development on the academic achievement of African American male college freshmen. In the late 1900s Black identity models were developed to help African Americans grasp hold of who they were, as they lived in the residues of the peculiar institution of slavery.…

  1. Achieve 3000: An Analysis of Usage and Impact, 2013-14. Technical Note. Volume 3, Number 1

    ERIC Educational Resources Information Center

    Urdegar, Steven M.

    2014-01-01

    Achieve 3000 is an online differentiated reading program for students with disabilities and English Language Learners in grades 6-8. The software delivers differentiated assignments at 12 different reading levels. The software features internal assessments that continuously gauge students' reading levels, provides feedback to teachers, and…

  2. The Impact of Guided Student-Generated Questioning on Chemistry Achievement and Self-Efficacy of Elementary Preservice Teachers

    ERIC Educational Resources Information Center

    Moseley, Christine; Bonner, Emily; Ibey, Marilyn

    2016-01-01

    This study investigated the use of Guided Student-Generated Questioning (GSGQ) as a metacognitive instructional strategy to increase chemistry achievement and self-efficacy of elementary preservice teachers. The Chemistry Self-Efficacy Scale (CSES), modified from the Biology Self-Efficacy Scale (BSES),was used to determine elementary preservice…

  3. The Impact of Higher Expectations in Math on the Perception of Achievement of High School Students with Disabilities

    ERIC Educational Resources Information Center

    Przybylinski, Vincent S., Jr.

    2016-01-01

    There exists a dearth of research on strategies that will help students with disabilities gain greater access to standards-based mathematics and close the mathematics achievement gap between general education students and students with disabilities (Browder et al., 2012; Jitendra, 2013; van Garderen, Scheuermann, Jackson, & Hampton, 2009).…

  4. Does Hands-On Science Practices Make an Impact on Achievement in Science? A Meta-Analysis

    ERIC Educational Resources Information Center

    Caglak, Serdar

    2017-01-01

    This study aimed to investigate to what extent the use of hands-on science activities influences on students? academic achievement in science. Review of literature revealed several research studies focusing upon such aim and thus, a meta-analysis of these researches was carried out to obtain an overall effect size estimate of hands-on science…

  5. A Quantitative Investigation into the Impacts of 1:1 iPads on Early Learners' ELA and Math Achievement

    ERIC Educational Resources Information Center

    Bebell, Damian; Pedulla, Joseph

    2015-01-01

    Many parents, educators, and policy makers see great potential for leveraging tools like laptop computers, tablets, and smartphones in the classrooms of the world. Although increasing students' technology access may be associated with increased student achievement, there is little research directly investigating objective measures of student…

  6. The Impact of Advanced Geometry and Measurement Curriculum Units on the Mathematics Achievement of First-Grade Students

    ERIC Educational Resources Information Center

    Gavin, M. Katherine; Casa, Tutita M.; Firmender, Janine M.; Carroll, Susan R.

    2013-01-01

    The goal of Project M2 was to develop and field-test challenging geometry and measurement units for K-2 students. The units were developed using recommendations from gifted, mathematics, and early childhood education. This article reports on achievement results for students in Grade 1 at 12 diverse sites in four states using the Iowa Tests of…

  7. The Impact of AP® Achievement Institute I on Students' AP Performance. Research Report No. 2012-7

    ERIC Educational Resources Information Center

    Bausmith, Jennifer Merriman; Laitusis, Vytas

    2012-01-01

    The AP Achievement Institute I (APAI I) is a four-day professional development program offered to teachers and administrators by EXCELerator™, a district reform program operated by the College Board. The APAI I program is designed to help teachers develop effective AP instructional strategies for a diverse student body and to help district,…

  8. Improving Achievement in Secondary Schools: Impact of a Literacy Project on Reading Comprehension and Secondary School Qualifications

    ERIC Educational Resources Information Center

    Lai, Mei Kuin; Wilson, Aaron; McNaughton, Stuart; Hsiao, Selena

    2014-01-01

    This paper examines whether a literacy intervention involving generic and content area literacy components can improve both achievement on a standardized reading test and the attainment of secondary school qualifications, and whether the intervention can be implemented by teachers in their regular classroom settings. We report on a design-based…

  9. The Impacts of Distance Interactivity on Learners' Achievements in Online Mobile Language Learning: Social Software and Participatory Learning

    ERIC Educational Resources Information Center

    Mellati, Morteza; Khademi, Marzieh

    2015-01-01

    The expansion of technological applications such as computers and mobile phones in the past three decades has impacted our life from different perspectives. Language teaching is no exception and like other fields of study, language teaching has also influenced by new language teaching sources and software. More recently, there has been a…

  10. The Impact of School Improvement Grants on Achievement: Plans for a National Evaluation Using a Regression Discontinuity Design

    ERIC Educational Resources Information Center

    Deke, John; Dragoset, Lisa

    2015-01-01

    Does receipt of School Improvement Grants (SIG) funding to implement a school intervention model have an impact on outcomes for low-performing schools? This study answers this question using a regression discontinuity design (RDD) that exploits cutoff values on the continuous variables used to define SIG eligibility tiers, comparing outcomes in…

  11. Impact of the Accelerated Reader Technology-Based Literacy Program on Overall Academic Achievement and School Attendance.

    ERIC Educational Resources Information Center

    Paul, Terrance; VanderZee, Darrel; Rue, Tom; Swanson, Scott

    A study demonstrated the positive impact of school ownership of the Accelerated Reader (AR) technology-based literacy program on attendance and standardized test scores at a representative sample of 2,500 elementary, middle, and high schools. These schools were compared with approximately 3,500 schools of similar geographic and demographic…

  12. A Training Programme on Managing Science Class Interactions: Its Impact on Teachers' Practises and on Their Pupils' Achievement

    ERIC Educational Resources Information Center

    Morge, Ludovic; Toczek, Marie-Christine; Chakroun, Nadia

    2010-01-01

    This research evaluates the impact of a training programme on trainee physics and chemistry teachers, focusing on the way pupils' explanations are dealt with during teacher-pupil interaction. The population is composed of 10 teachers and 303 pupils, from which the experimental sample was taken (8 teachers and 172 pupils). The qualitative analysis…

  13. The Impact of Organizational Culture on High School Teachers' Self-Efficacy, Job Satisfaction, and Student Achievement

    ERIC Educational Resources Information Center

    DeNicola, Thomas C.

    2015-01-01

    The purpose of this study was to examine the impact that school culture, comprised of the variables cultivating a culture of collaboration, employing a data-informed focus on improvement through professional communication, and organizational commitment had on teachers' self-efficacy (teacher autonomy, interpersonal efficacy, and professional…

  14. The Impact of a Cash Transfer Program on Cognitive Achievement: The "Bono de Desarrollo Humano" of Ecuador

    ERIC Educational Resources Information Center

    Ponce, Juan; Bedi, Arjun S.

    2010-01-01

    Throughout Latin America, conditional cash transfer (CCT) programs play an important role in social policy. These programs aim to influence the accumulation of human capital, as well as reduce poverty. In terms of educational outcomes, a number of impact evaluation studies have shown that such programs have led to an increase in school enrollment,…

  15. Junior Reserve Officer Training Corps Career Academies and Their Impact on Academic Achievement in Urban Public Schools

    ERIC Educational Resources Information Center

    Neely, Sheryl Austin

    2012-01-01

    Low attendance, poor behavior, low test scores, and low graduation rates among at-risk students have created a concern in urban school districts. The purpose of this study was to illuminate the impact of Junior Reserve Officer Training Corps (JROTC) Academy programs on students' academic performance. The theoretical foundation of the research…

  16. Impact of General Chemistry on Student Achievement and Progression to Subsequent Chemistry Courses: A Regression Discontinuity Analysis

    ERIC Educational Resources Information Center

    Shultz, Ginger V.; Gottfried, Amy C.; Winschel, Grace A.

    2015-01-01

    General chemistry is a gateway course that impacts the STEM trajectory of tens of thousands of students each year, and its role in the introductory curriculum as well as its pedagogical design are the center of an ongoing debate. To investigate the role of general chemistry in the curriculum, we report the results of a posthoc analysis of 10 years…

  17. Distinguishing Models of Professional Development: The Case of an Adaptive Model's Impact on Teachers' Knowledge, Instruction, and Student Achievement

    ERIC Educational Resources Information Center

    Koellner, Karen; Jacobs, Jennifer

    2015-01-01

    We posit that professional development (PD) models fall on a continuum from highly adaptive to highly specified, and that these constructs provide a productive way to characterize and distinguish among models. The study reported here examines the impact of an adaptive mathematics PD model on teachers' knowledge and instructional practices as well…

  18. An Examination of the Impact of Teacher Quality and "Opportunity Gap" on Student Science Achievement in China

    ERIC Educational Resources Information Center

    Zhang, Danhui; Campbell, Todd

    2015-01-01

    This study aims to better understand questions related to the impact of teacher quality and access to qualified teachers in China. A large-scale data set collected in 2010 in China was used along with concurrently collected teacher questionnaires. In total, surveys from 9,943 8th grade students from 343 middle schools in 6 provinces were used,…

  19. Maximum margin Bayesian network classifiers.

    PubMed

    Pernkopf, Franz; Wohlmayr, Michael; Tschiatschek, Sebastian

    2012-03-01

    We present a maximum margin parameter learning algorithm for Bayesian network classifiers using a conjugate gradient (CG) method for optimization. In contrast to previous approaches, we maintain the normalization constraints on the parameters of the Bayesian network during optimization, i.e., the probabilistic interpretation of the model is not lost. This enables us to handle missing features in discriminatively optimized Bayesian networks. In experiments, we compare the classification performance of maximum margin parameter learning to conditional likelihood and maximum likelihood learning approaches. Discriminative parameter learning significantly outperforms generative maximum likelihood estimation for naive Bayes and tree augmented naive Bayes structures on all considered data sets. Furthermore, maximizing the margin dominates the conditional likelihood approach in terms of classification performance in most cases. We provide results for a recently proposed maximum margin optimization approach based on convex relaxation. While the classification results are highly similar, our CG-based optimization is computationally up to orders of magnitude faster. Margin-optimized Bayesian network classifiers achieve classification performance comparable to support vector machines (SVMs) using fewer parameters. Moreover, we show that unanticipated missing feature values during classification can be easily processed by discriminatively optimized Bayesian network classifiers, a case where discriminative classifiers usually require mechanisms to complete unknown feature values in the data first.

  20. The Impact of Design-Based STEM Integration Curricula on Student Achievement in Engineering, Science, and Mathematics

    NASA Astrophysics Data System (ADS)

    Selcen Guzey, S.; Harwell, Michael; Moreno, Mario; Peralta, Yadira; Moore, Tamara J.

    2016-11-01

    The new science education reform documents call for integration of engineering into K-12 science classes. Engineering design and practices are new to most science teachers, meaning that implementing effective engineering instruction is likely to be challenging. This quasi-experimental study explored the influence of teacher-developed, engineering design-based science curriculum units on learning and achievement among grade 4-8 students of different races, gender, special education status, and limited English proficiency (LEP) status. Treatment and control students (n = 4450) completed pretest and posttest assessments in science, engineering, and mathematics as well as a state-mandated mathematics test. Single-level regression results for science outcomes favored the treatment for one science assessment (physical science, heat transfer), but multilevel analyses showed no significant treatment effect. We also found that engineering integration had different effects across race and gender and that teacher gender can reduce or exacerbate the gap in engineering achievement for student subgroups depending on the outcome. Other teacher factors such as the quality of engineering-focused science units and engineering instruction were predictive of student achievement in engineering. Implications for practice are discussed.

  1. The Impact of Design-Based STEM Integration Curricula on Student Achievement in Engineering, Science, and Mathematics

    NASA Astrophysics Data System (ADS)

    Selcen Guzey, S.; Harwell, Michael; Moreno, Mario; Peralta, Yadira; Moore, Tamara J.

    2017-04-01

    The new science education reform documents call for integration of engineering into K-12 science classes. Engineering design and practices are new to most science teachers, meaning that implementing effective engineering instruction is likely to be challenging. This quasi-experimental study explored the influence of teacher-developed, engineering design-based science curriculum units on learning and achievement among grade 4-8 students of different races, gender, special education status, and limited English proficiency (LEP) status. Treatment and control students ( n = 4450) completed pretest and posttest assessments in science, engineering, and mathematics as well as a state-mandated mathematics test. Single-level regression results for science outcomes favored the treatment for one science assessment (physical science, heat transfer), but multilevel analyses showed no significant treatment effect. We also found that engineering integration had different effects across race and gender and that teacher gender can reduce or exacerbate the gap in engineering achievement for student subgroups depending on the outcome. Other teacher factors such as the quality of engineering-focused science units and engineering instruction were predictive of student achievement in engineering. Implications for practice are discussed.

  2. The Impacts of Budget Reductions on Indiana's Public Schools: The Impact of Budget Changes on Student Achievement, Personnel, and Class Size for Public School Corporations in the State of Indiana

    ERIC Educational Resources Information Center

    Jarman, Del W.; Boyland, Lori G.

    2011-01-01

    In recent years, economic downturn and changes to Indiana's school funding have resulted in significant financial reductions in General Fund allocations for many of Indiana's public school corporations. The main purpose of this statewide study is to examine the possible impacts of these budget reductions on class size and student achievement. This…

  3. Achieving Research Impact Through Co‐creation in Community‐Based Health Services: Literature Review and Case Study

    PubMed Central

    JACKSON, CLAIRE; SHAW, SARA; JANAMIAN, TINA

    2016-01-01

    Policy Points: Co‐creation—collaborative knowledge generation by academics working alongside other stakeholders—is an increasingly popular approach to aligning research and service development.It has potential for “moving beyond the ivory towers” to deliver significant societal impact via dynamic, locally adaptive community‐academic partnerships.Principles of successful co‐creation include a systems perspective, a creative approach to research focused on improving human experience, and careful attention to governance and process.If these principles are not followed, co‐creation efforts may fail. Context Co‐creation—collaborative knowledge generation by academics working alongside other stakeholders—reflects a “Mode 2” relationship (knowledge production rather than knowledge translation) between universities and society. Co‐creation is widely believed to increase research impact. Methods We undertook a narrative review of different models of co‐creation relevant to community‐based health services. We contrasted their diverse disciplinary roots and highlighted their common philosophical assumptions, principles of success, and explanations for failures. We applied these to an empirical case study of a community‐based research‐service partnership led by the Centre of Research Excellence in Quality and Safety in Integrated Primary‐Secondary Care at the University of Queensland, Australia. Findings Co‐creation emerged independently in several fields, including business studies (“value co‐creation”), design science (“experience‐based co‐design”), computer science (“technology co‐design”), and community development (“participatory research”). These diverse models share some common features, which were also evident in the case study. Key success principles included (1) a systems perspective (assuming emergence, local adaptation, and nonlinearity); (2) the framing of research as a creative enterprise with human

  4. Lunar Farming: Achieving Maximum Yield for the Exploration of Space

    NASA Technical Reports Server (NTRS)

    Salisbury, Frank B.

    1991-01-01

    A look at what it might be like on a lunar farm in the year 2020 is provided from the point of view of the farmer. Of necessity, the farm would be a Controlled Ecological (or Environment) Life-Support System (CELSS) or a bioregenerative life-support system. Topics covered in the imaginary trip through the farm are the light, water, gasses, crops, the medium used for plantings, and the required engineering. The CELSS is designed with four functioning parts: (1) A plant-production facility with higher plants and algae; (2) food technology kitchens; (3) waste processing and recycling facilities; and (4) control systems. In many cases there is not yet enough information to be sure about matters discussed, but the exercise in imagination pinpoints a number of areas that still need considerable research to resolve the problems perceived.

  5. EPA Maximum Achievable Contraction of Technocrats Act of 2013

    THOMAS, 113th Congress

    Rep. Griffith, H. Morgan [R-VA-9

    2013-12-03

    12/16/2013 Referred to the Subcommittee on Horticulture, Research, Biotechnology, and Foreign Agriculture. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

  6. Shifting distributions of adult Atlantic sturgeon amidst post-industrialization and future impacts in the Delaware River: a maximum entropy approach.

    PubMed

    Breece, Matthew W; Oliver, Matthew J; Cimino, Megan A; Fox, Dewayne A

    2013-01-01

    Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) experienced severe declines due to habitat destruction and overfishing beginning in the late 19(th) century. Subsequent to the boom and bust period of exploitation, there has been minimal fishing pressure and improving habitats. However, lack of recovery led to the 2012 listing of Atlantic sturgeon under the Endangered Species Act. Although habitats may be improving, the availability of high quality spawning habitat, essential for the survival and development of eggs and larvae may still be a limiting factor in the recovery of Atlantic sturgeon. To estimate adult Atlantic sturgeon spatial distributions during riverine occupancy in the Delaware River, we utilized a maximum entropy (MaxEnt) approach along with passive biotelemetry during the likely spawning season. We found that substrate composition and distance from the salt front significantly influenced the locations of adult Atlantic sturgeon in the Delaware River. To broaden the scope of this study we projected our model onto four scenarios depicting varying locations of the salt front in the Delaware River: the contemporary location of the salt front during the likely spawning season, the location of the salt front during the historic fishery in the late 19(th) century, an estimated shift in the salt front by the year 2100 due to climate change, and an extreme drought scenario, similar to that which occurred in the 1960's. The movement of the salt front upstream as a result of dredging and climate change likely eliminated historic spawning habitats and currently threatens areas where Atlantic sturgeon spawning may be taking place. Identifying where suitable spawning substrate and water chemistry intersect with the likely occurrence of adult Atlantic sturgeon in the Delaware River highlights essential spawning habitats, enhancing recovery prospects for this imperiled species.

  7. The differential impact of academic self-regulatory methods on academic achievement among university students with and without learning disabilities.

    PubMed

    Ruban, Lilia M; McCoach, D Betsy; McGuire, Joan M; Reis, Sally M

    2003-01-01

    Although research on academic self-regulation has proliferated in recent years, no studies have investigated the question of whether the perceived usefulness and the use of standard self-regulated learning strategies and compensation strategies provide a differential prediction of academic achievement for university students with and without learning disabilities (LD). We developed and tested a model explaining interrelationships among self-regulatory variables and grade point average (GPA) using structural equation modeling and multiple group analysis for students with LD (n = 53) and without LD (n = 421). Data were gathered using a new instrument, the Learning Strategies and Study Skills survey. The results of this study indicate that students with LD differed significantly from students without LD in the relationships between their motivation for and use of standard self-regulated learning strategies and compensation strategies, which in turn provided a differential explanation of academic achievement for students with and without LD. These paths of influence and idiosyncrasies of academic self-regulation among students with LD were interpreted in terms of social cognitive theory, metacognitive theory, and research conducted in the LD field.

  8. An exploration of the impact of family background factors on the science achievement of Afro-Caribbean and African American students in the United States

    NASA Astrophysics Data System (ADS)

    Pinder, Patrice J.

    Ogbu and Simons (1998) defined voluntary immigrants as individuals who chose to migrate to the United States (U.S.). Involuntary immigrants are defined as individuals whose ancestors were brought to the U.S. by force (Obgu & Simons, 1998). There have been recent reports indicating that voluntary immigrants are outperforming involuntary immigrants (Fisher, 2005; Williams, Fleming, Jones, & Griffin, 2007). There seems to be a trend in voluntary immigrants exhibiting a higher academic achievement pattern than involuntary immigrants (Fisher, 2005; Rong & Preissle, 1998; Williams et al., 2007). However, the reason for the groups' differences in achievement has not been extensively explored. The primary objective of this research study was to explore the impact of family background on the academic achievement patterns of Afro-Caribbean and African American students in the United States. The study utilized two research designs; a causal-comparative and a correlational design. A questionnaire was distributed to a sample of eighty-seven high school students. Eighteen of the participants were Afro-Caribbean students, and sixty-seven were African American students. Chemistry test scores for the students were also provided. The results of the study indicated that Afro-Caribbean students outperformed African American students on the test of science achievement. The difference was statistically significant (t= 2.43, p<0.05). Additionally, results suggested that there were a few significant differences in Afro-Caribbean and African American students' family backgrounds. Moreover, the findings of this study suggest that the positive impact of arrival status on the first-generation of Afro-Caribbean immigrants may be influencing their children's academic success in science. The present study holds a few implications for parents and teachers of immigrant minority students. Additionally, the current researcher has offered several implications for future research on ethnicity

  9. Is the increasing policy use of Impact Assessment in Europe likely to undermine efforts to achieve healthy public policy?

    PubMed

    Smith, Katherine E; Fooks, Gary; Collin, Jeff; Weishaar, Heide; Gilmore, Anna B

    2010-06-01

    European policymakers have recently become increasingly committed to using Impact Assessment (IA) to inform policy decisions. Welcoming this development, the public health community has not yet paid sufficient attention to conceptual concerns about IA or to corporate efforts to shape the way in which IA is used. This essay is a thematic analysis of literature concerning IA and associated tools and a related assessment of the European Union's (EU) new 'integrated' IA tool. Eight key concerns regarding IA are identified from the literature, many of which relate to the potential for undue corporate influence. Assessment of the EU's IA tool suggests that many of these concerns are valid. The findings raise crucial questions about the role of IA in public policy. By focusing mainly on the impact on the economy and business environment, the EU's current approach to IA may undermine healthy public policy. Those interested in public health need to acknowledge and respond to the problems associated with IA and evaluate the effects of 'integrated' IA tools on policy decisions affecting public health.

  10. [ARIA (Allergic Rhinitis and its Impact on Asthma). Achievements in 10 years and future needs in Latin America].

    PubMed

    Baena-Cagnani, Carlos E; Sánchez-Borges, Mario; Zernotti, Mario E; Larenas-Linnemann, Désireé; Cruz, Alvaro A; González-Díaz, Sandra N; Ivancevich, Juan C; Aldrey-Palacios, Oscar; Sisul, Juan C; Solé, Dirceu; Cepeda, Alfonso M; Jares, Edgardo J; Calvo Gil, Mario; Valentin-Rostán, Marylin; Yáñez, Anahí; Gereda, José; Cardona-Villa, Ricardo; Rosario, Nelson; Croce, Víctor H; Bachert, Claus; Canonica, G Walter; Demoly, Pascal; Passalacqua, Giovanni; Samolinski, Boleslaw; Schünemann, Holger J; Yorgancioglu, Arzu; Ansotegui, Ignacio J; Khaltaev, Nikolai; Bedbrook, Anna; Zuberbier, Torsten; Bousquet, Jean

    2013-01-01

    Allergic rhinitis and asthma represent global problems of public health affecting all age groups; asthma and allergic rhinitis frequently coexist in the same patients. In Latin American prevalence of allergic rhinitis, although variable, is very high. Allergic rhinitis and its Impact on Asthma (ARIA) started during a workshop of the World Health Organization performed in 1999 and was published in 2001. ARIA proposed a new classification of allergic rhinitis in intermittent or persistent and mild or moderate-severe. This approach of classification reflects more nearly the impact of allergic rhinitis in patients. In its review of 2010 ARIA developed guidelines for diagnosis and treatment of allergic rhinitis and of clinical practices for management of comorbidities of allergic rhinitis and asthma based on GRADE (Grading of Recommendations, Development and Evaluation). ARIA has been spread and implemented in more than 50 countries. In Latin American an intense activity has been developed to spread these recommendations in almost all the countries of the region and it is important to record the obtained goals in the diffusion and implementation of ARIA, as well as to identify the unsatisfied needs from the clinical, research and implementation points of view. Final objective is to reinforce the priority that allergy and asthma should have, especially in children, in the programs of public health, as they have been prioritized in European Union in 2011.

  11. Maximum thrust mode evaluation

    NASA Technical Reports Server (NTRS)

    Orme, John S.; Nobbs, Steven G.

    1995-01-01

    Measured reductions in acceleration times which resulted from the application of the F-15 performance seeking control (PSC) maximum thrust mode during the dual-engine test phase is presented as a function of power setting and flight condition. Data were collected at altitudes of 30,000 and 45,000 feet at military and maximum afterburning power settings. The time savings for the supersonic acceleration is less than at subsonic Mach numbers because of the increased modeling and control complexity. In addition, the propulsion system was designed to be optimized at the mid supersonic Mach number range. Recall that even though the engine is at maximum afterburner, PSC does not trim the afterburner for the maximum thrust mode. Subsonically at military power, time to accelerate from Mach 0.6 to 0.95 was cut by between 6 and 8 percent with a single engine application of PSC, and over 14 percent when both engines were optimized. At maximum afterburner, the level of thrust increases were similar in magnitude to the military power results, but because of higher thrust levels at maximum afterburner and higher aircraft drag at supersonic Mach numbers the percentage thrust increase and time to accelerate was less than for the supersonic accelerations. Savings in time to accelerate supersonically at maximum afterburner ranged from 4 to 7 percent. In general, the maximum thrust mode has performed well, demonstrating significant thrust increases at military and maximum afterburner power. Increases of up to 15 percent at typical combat-type flight conditions were identified. Thrust increases of this magnitude could be useful in a combat situation.

  12. Accounting for the dependence of P(E',E) on the maximum impact parameter in classical trajectory calculations: application to the H2O-H2O collisional relaxation.

    PubMed

    Bustos-Marún, Raúl A; Coronado, Eduardo A; Ferrero, Juan C

    2007-10-21

    In this work we report a novel methodology that is able to predict how energy transfer transition probability density functions [P(E',E)] change with the maximum impact parameter (bmax) used in trajectory calculations (TC's). The method assumes that P(E',E) can be described by a sum of exponential functions and that all the trajectories with an initial impact parameter beyond a certain critical value will contribute only to the elastic peak [P(E',E) for E'=E]. This approach is applied to H2O-H2O collisions at different initial vibrational energies of the excited molecules and temperatures of bath gas. The results show that it is possible to reproduce with high accuracy the whole P(E',E) obtained from a given bmax, using the results of TC's performed at another bmax. The new methodology also leads us to propose a new criterion to choose the value of bmax.

  13. Achieving a “Grand Convergence” in Global Health: Modeling the Technical Inputs, Costs, and Impacts from 2016 to 2030

    PubMed Central

    Boyle, Colin F.; Levin, Carol; Hatefi, Arian; Madriz, Solange; Santos, Nicole

    2015-01-01

    Background The Commission on Investing in Health published its report, GlobalHealth2035, in 2013, estimating an investment case for a grand convergence in health outcomes globally. In support of the drafting of the Sustainable Development Goals (SDGs), we estimate what the grand convergence investment case might achieve—and what investment would be required—by 2030. Methods and Findings Our projection focuses on a sub-set of low-income (LIC) or lower-middle-income countries (LMIC). We start with a country-based (bottom-up) analysis of the costs and impact of scaling up reproductive, maternal, and child health tools, and select HIV and malaria interventions. We then incorporate global (top-down) analyses of the costs and impacts of scaling up existing tools for tuberculosis, additional HIV interventions, the costs to strengthen health systems, and the costs and benefits from scaling up new health interventions over the time horizon of this forecast. These data are then allocated to individual countries to provide an aggregate projection of potential cost and impact at the country level. Finally, incremental costs of R&D for low-income economies and the costs of addressing NTDs are added to provide a global total cost estimate of the investment scenario. Results Compared with a constant coverage scenario, there would be more than 60 million deaths averted in LIC and 70 million deaths averted in LMIC between 2016 and 2030. For the years 2015, 2020, 2025, and 2030, the incremental costs of convergence in LIC would be (US billion) $24.3, $21.8, $24.7, and $27, respectively; in LMIC, the incremental costs would be (US billion) $34.75, $38.9, $48.7, and $56.3, respectively. Conclusion Key health outcomes in low- and low-middle income countries can significantly converge with those of wealthier countries by 2030, and the notion of a “grand convergence” may serve as a unifying theme for health indicators in the SDGs. PMID:26452263

  14. Views from the global south: exploring how student volunteers from the global north can achieve sustainable impact in global health

    PubMed Central

    2013-01-01

    Background The body of research and practice regarding student volunteer abroad experiences largely focuses on ensuring the optimal learning experience for the student from the Global North, without equivalent attention to the benefits, if any, to the host institution in the Global South. In this debate article, we examine an often overlooked component of global student volunteer programs: the views of the local partner on what makes for a mutually beneficial partnership between volunteers from the Global North and institutions in the Global South. Discussion To guide our discussion, we drew upon the experiences of a Kenyan NGO with a Canadian student volunteer in the summer of 2012, organized via a formalized partnership with a Canadian university. We found that the approach of the NGO to hosting the student mirrored the organizational behaviour theories of Margaret J. Wheatley, who emphasized a disorderly or ‘chaotic’ approach to acquiring impactful change, coupled with a focus on building solid human relationships. Rather than following a set of rigid goals or tasks, the student was encouraged to critically engage and participate in all aspects of the culture of the organization and country, to naturally discover an area where his priorities aligned with the needs of the NGO. Solid networks and interpersonal connections resulted in a process useful for the organization long after the student’s short-term placement ended. Summary Our discussion reveals key features of successful academic volunteer abroad placements: equal partnership in the design phase between organizations in the Global North and Global South; the absence of rigid structures or preplanned tasks during the student’s placement; participatory observation and critical engagement of the student volunteer; and a willingness of the partners to measure impact by the resultant process instead of tangible outcomes. PMID:23889908

  15. Impact of nutritional status at the onset of elementary school on academic aptitude test achievement at the end of high school in a multicausal approach.

    PubMed

    Ivanovic, Daniza M; Rodríguez, María Del Pilar N; Pérez, Hernán T; Alvear, Jorge A; Almagià, Atilio F; Toro, Triana D; Urrutia, María Soledad C; Cruz, Arturo L; Ivanovic, Rodolfo M

    2009-07-01

    Like in many other countries, few investigations have been carried out in Chile to measure the long-term effects of nutritional status at an early age on scholastic achievement in a multicausal approach. The objectives of the present study were to describe the impact of nutritional, intellectual, family, educational and socio-economic variables at the onset of elementary school in 1987 that may affect achievement on the academic aptitude test (AAT) taken in 1998 at the end of high school, and to quantify the impact of these independent variables on the AAT. The present study comprises two cross-sectional stages: in 1987, a representative sample of 813 elementary school first-grader Chilean children from the Metropolitan Region was randomly chosen; in 1998, 12 years later, 632 school-age children were located and only 351 of them graduated from high school and, from these, 260 students took the AAT. In 1987 nutritional status was assessed through anthropometric parameters, intellectual ability by the Raven's Progressive Matrices Test, scholastic achievement through Spanish language and mathematics tests, and socio-economic status using Graffar's modified scale; family variables were also recorded. Maternal schooling, scholastic achievement, intellectual ability and head circumference-for-age z-score (anthropometric indicator of both nutritional background and brain development) all in 1987 were the independent variables with the greatest explanatory power for AAT variance in 1998 (r2 0.402). These results provide a foundation to identify the risk factors at an early age that affect AAT scores and should be useful to improve nutritional and educational policies.

  16. The impact of early school behavior and educational achievement on adult drug use disorders: a prospective study.

    PubMed

    Fothergill, Kate E; Ensminger, Margaret E; Green, Kerry M; Crum, Rosa M; Robertson, Judith; Juon, Hee-Soon

    2008-01-01

    Few longitudinal studies have examined the effects of education on drug use disorders among community populations of African Americans. This study explores the impact of multiple early education indicators on later problem drug use in an African American population followed for more than 35 years. The initial cohort comprised all 1st graders (N=1242, 51% female) living in the Woodlawn community of Chicago in 1966. Follow-up assessments were conducted in adolescence (1975-76), early adulthood (1992-93), and mid adulthood (2002-03). One or both adult interviews were completed by 1053 individuals providing information for identifying lifetime drug use disorders. Logistic regression with multiple imputation revealed several important relationships between early education indicators and DSM-III-R/DSM-IV drug use disorders. Specifically, the risk for adult problem drug use was related to: underachievement in 1st grade; low 7th and 8th grade standardized math scores; both suspension from and skipping school in adolescence; not having a high school diploma (compared to having a college degree), and having a diploma or GED (compared to having a college degree). Also, 1st graders characterized as shy by their teachers were less likely to develop problem drug use in adulthood. Results indicate potential opportunities for targeted intervention at multiple life stages.

  17. Maximum urinary flow rate by uroflowmetry: automatic or visual interpretation.

    PubMed

    Grino, P B; Bruskewitz, R; Blaivas, J G; Siroky, M B; Andersen, J T; Cook, T; Stoner, E

    1993-02-01

    We measured the maximum urinary flow rate monthly for 1 year by uroflowmetry in 1,645 patients in a double-blind, placebo-controlled study of finasteride therapy for benign prostatic hyperplasia. Patients were randomized to receive placebo (555) or finasteride (1,090). A total of 23,857 flow measurements was obtained. Because of the presence of artifacts on many uroflow curves, we read the maximum urinary flow rate values manually and compared them to the values provided electronically by the uroflowmeter. On average, the manually read values were 1.5 ml. per second lower than the machine read values. Artifacts causing a difference of 2 ml. per second or more between the 2 methods were found in 20% and of more than 3 ml. per second in 9% of the tracings. The difference between treatment groups in mean maximum urinary flow rate change at the end of the study was the same with both reading methods. However, confidence intervals were 15 to 25% larger for the machine read compared to the manually read values. This larger variability in machine read maximum urinary flow rate has a marked negative impact on the power of statistical tests to assess any given difference in maximum urinary flow rate between treatment groups. Furthermore, it increases sample size requirements by 50% to achieve any given statistical power. We conclude that maximum urinary flow rate artifacts contribute significantly to the variability of maximum urinary flow rate measurement by uroflowmetry. Manual reading of the maximum urinary flow rate eliminates an important fraction of such variability.

  18. A curricular frame for physics education: Development, comparison with students' interests, and impact on students' achievement and self-concept

    NASA Astrophysics Data System (ADS)

    Häussler, Peter; Hoffmann, Lore

    2000-11-01

    This article presents three interlinked studies aimed at: (1) developing a curricular frame for physics education; (2) assessing the students' interest in the contents, contexts, and activities that are suggested by that curricular frame; and (3) developing a curriculum that is in line with that frame and measuring its cognitive and emotional effects on students. The curricular frame was developed by adopting the Delphi technique and drawing on the expertise of 73 persons selected according to specified selection criteria. Interest data of some 8000 students and information of the presently taught physics curriculum were sampled longitudinally as well as cross-sectionally in various German Länder (states) by questionnaire. The third study comprised 23 experimental and 7 control classes. As a result of the comparison between the features of the curricular frame, the interest structure of students, and the current physics curriculum, there is a remarkable congruency between students' interest in physics and the kind of physics education identified in the Delphi study as being relevant. However, there is a considerable discrepancy between students' interest and the kind of physics instruction practiced in the physics classroom. Regression analysis revealed that students' interest in physics as a school subject is hardly related to their interest in physics, but mainly to the students' self-esteem of being good achievers. The data strongly suggest physics be taught so that students have a chance to develop a positive physics-related self-concept and to link physics with situations they encounter outside the classroom. A curriculum based on these principles proved superior compared to a traditional curriculum.

  19. Training Research: Practical Recommendations for Maximum Impact

    PubMed Central

    Beidas, Rinad S.; Koerner, Kelly; Weingardt, Kenneth R.; Kendall, Philip C.

    2011-01-01

    This review offers practical recommendations regarding research on training in evidence-based practices for mental health and substance abuse treatment. When designing training research, we recommend: (a) aligning with the larger dissemination and implementation literature to consider contextual variables and clearly defining terminology, (b) critically examining the implicit assumptions underlying the stage model of psychotherapy development, (c) incorporating research methods from other disciplines that embrace the principles of formative evaluation and iterative review, and (d) thinking about how technology can be used to take training to scale throughout all stages of a training research project. An example demonstrates the implementation of these recommendations. PMID:21380792

  20. Maximum Likelihood Fusion Model

    DTIC Science & Technology

    2014-08-09

    data fusion, hypothesis testing,maximum likelihood estimation, mobile robot navigation REPORT DOCUMENTATION PAGE 11. SPONSOR/MONITOR’S REPORT...61 vi 9 Bibliography 62 vii 10 LIST OF FIGURES 1.1 Illustration of mobile robotic agents. Land rovers such as (left) Pioneer robots ...simultaneous localization and mapping 1 15 Figure 1.1: Illustration of mobile robotic agents. Land rovers such as (left) Pioneer robots , (center) Segways

  1. The Solar Maximum Mission

    NASA Astrophysics Data System (ADS)

    Sutton, C.

    1980-07-01

    The objectives, instruments, operation and spacecraft design for the Solar Maximum Mission are discussed. The satellite, first in a series of Multi-Mission Modular Spacecraft, was launched on February 14, 1980, to take advantage of the current maximum in the solar activity cycle to study solar flares at wavelengths from the visible to the gamma-ray. The satellite carries six instruments for the simultaneous study of solar flares, namely the coronagraph/polarimeter, X-ray polychromator, ultraviolet spectrometer and polarimeter, hard X-ray imaging spectrometer, hard X-ray burst spectrometer and gamma-ray spectrometer, and an active cavity radiometer for the accurate determination of the solar constant. In contrast to most satellite operations, Solar Maximum Mission investigators work together for the duration of the flight, comparing data obtained by the various instruments and planning observing programs daily on the basis of flare predictions and indicators. Thus far into the mission, over 50 data sets on reasonably large flares have been obtained, and important observations of coronal transients, magnetic fields in the transition region, flare time spectra, and material emitting X-rays between flares have been obtained.

  2. How the Alliance for Climate Education engages national and local partners to achieve collective impact in climate literacy and action (Invited)

    NASA Astrophysics Data System (ADS)

    Lappe, M.; Gonzalez, R.; Shanley Hope, S.

    2013-12-01

    The Alliance for Climate Education (ACE) has a mission to educate and inspire young people to break through the challenge of climate change. ACE believes that achieving a safe and stable climate in our lifetime requires the ideas, action and influence of young people. Since 2009, ACE has reached almost 2 million teens in 2,200 schools in over 20 states across the US. In order to support these young people to become leaders in their schools and communities, ACE works closely with local and national partners. In this presentation, ACE will discuss strategic partnerships that have yielded measurable impact and explore how nonprofits, universities, school districts, private companies and government agencies can more effectively align efforts to achieve shared goals. Examples of successful partnerships discussed will include PG&E, Chicago Public Schools, Monterey Bay Aquarium, DC Public Schools, the Climate Literacy and Energy Awareness Network, NOAA, The Next Generation, Los Angeles Public Schools and research universities. ACE will also discuss how research in the field of transformational leadership informs our partnership strategy.

  3. The Solar Maximum Mission

    NASA Astrophysics Data System (ADS)

    Chipman, E. G.

    1981-03-01

    The Solar Maximum Mission spacecraft, launched on 1980 February 14, carries seven instruments for the study of solar flares and other aspects of solar activity. These instruments observe in spectral ranges from gamma-rays through the visible, using imaging, spectroscopy, and high-time-resolution light curves to study flare phenomena. In addition, one instrument incorporates an active cavity radiometer for accurate measurement of the total solar radiant output. This paper reviews some of the most important current observational and theoretical questions of solar flare physics and indicates the ways in which the experiments on SMM will be able to attack these questions. The SMM observing program is described.

  4. On Maximum FODO Acceptance

    SciTech Connect

    Batygin, Yuri Konstantinovich

    2014-12-24

    This note illustrates maximum acceptance of FODO quadrupole focusing channel. Acceptance is the largest Floquet ellipse of a matched beam: A = $\\frac{a^2}{β}$$_{max}$ where a is the aperture of the channel and βmax is the largest value of beta-function in the channel. If aperture of the channel is restricted by a circle of radius a, the s-s acceptance is available for particles oscillating at median plane, y=0. Particles outside median plane will occupy smaller phase space area. In x-y plane, cross section of the accepted beam has a shape of ellipse with truncated boundaries.

  5. Maximum predictive power and the superposition principle

    NASA Technical Reports Server (NTRS)

    Summhammer, Johann

    1994-01-01

    In quantum physics the direct observables are probabilities of events. We ask how observed probabilities must be combined to achieve what we call maximum predictive power. According to this concept the accuracy of a prediction must only depend on the number of runs whose data serve as input for the prediction. We transform each probability to an associated variable whose uncertainty interval depends only on the amount of data and strictly decreases with it. We find that for a probability which is a function of two other probabilities maximum predictive power is achieved when linearly summing their associated variables and transforming back to a probability. This recovers the quantum mechanical superposition principle.

  6. The last glacial maximum

    USGS Publications Warehouse

    Clark, P.U.; Dyke, A.S.; Shakun, J.D.; Carlson, A.E.; Clark, J.; Wohlfarth, B.; Mitrovica, J.X.; Hostetler, S.W.; McCabe, A.M.

    2009-01-01

    We used 5704 14C, 10Be, and 3He ages that span the interval from 10,000 to 50,000 years ago (10 to 50 ka) to constrain the timing of the Last Glacial Maximum (LGM) in terms of global ice-sheet and mountain-glacier extent. Growth of the ice sheets to their maximum positions occurred between 33.0 and 26.5 ka in response to climate forcing from decreases in northern summer insolation, tropical Pacific sea surface temperatures, and atmospheric CO2. Nearly all ice sheets were at their LGM positions from 26.5 ka to 19 to 20 ka, corresponding to minima in these forcings. The onset of Northern Hemisphere deglaciation 19 to 20 ka was induced by an increase in northern summer insolation, providing the source for an abrupt rise in sea level. The onset of deglaciation of the West Antarctic Ice Sheet occurred between 14 and 15 ka, consistent with evidence that this was the primary source for an abrupt rise in sea level ???14.5 ka.

  7. The maximum oxygen intake*

    PubMed Central

    Shephard, Roy J.; Allen, C.; Benade, A. J. S.; Davies, C. T. M.; di Prampero, P. E.; Hedman, R.; Merriman, J. E.; Myhre, K.; Simmons, R.

    1968-01-01

    Lack of cardiorespiratory fitness may well contribute to the increasing prevalence of degenerative cardiovascular disease throughout the world. As a first step towards co-ordinated and internationally comparable investigation of this problem, methods of measuring the reference standard of cardiorespiratory fitness—the maximum oxygen intake, (V̇o2)max—were compared by an international working party that met in Toronto in the summer of 1967. Repeated testing of 24 subjects showed that the (V̇o2)max was greatest on the treadmill, 3.4% smaller in a stepping test, and 6.6% smaller during use of a bicycle ergometer. There were also parallel differences in cardiac stroke volume. Uphill treadmill running was recommended for the laboratory measurement of (V̇o2)max, and stepping or bicycle exercise for field studies. A discontinuous series of maximum tests caused some improvement in the fitness of subjects, and a “continuous” test (with small increases in load at 2-min intervals) was preferred. PMID:5303329

  8. The Solar Maximum Mission

    NASA Astrophysics Data System (ADS)

    Simnett, G. M.

    The scientific goals, instrumentation and operation, and results from the Solar Maximum Mission are described. The spacecraft was launched to observe the peak of the solar cycle and the impulsive phase of large flares. Instrumentation included a gamma ray spectrometer, X ray burst spectrometer, imaging spectrometer, and polychromator, a UV spectrometer and polarimeter, a coronagraph/polarimeter, and an active cavity radiometer for measurements at wavelengths ranging from the Hα line at 6563 A up to the gamma ray region of the spectrum. Command programs were prepared one day in advance by each team for its instrument, and limited readjustment was available in real-time. The spacecraft was equipped to, and did, point the instruments at one region for an expected flare build-up, and maintain that heading for an extended period of time through the appearance, development, and demise of the flare.

  9. The impact of a science-based integrated instructional protocol on the motivation, reading comprehension, and science achievement of fourth and fifth graders

    NASA Astrophysics Data System (ADS)

    Stephens, Kathy E.

    The purpose of this study was to determine the impact of implementing an integrated instructional protocol of science-based informational texts as teacher read alouds, student independent reading, and written journal responses on motivation, reading comprehension, and science achievement of fourth- and fifth-grade students with attention to specific student groups, including gender and ethnicities. A mixed methods research design included a 12-week intervention conducted with 68 fourth and fifth graders and 30 nonintervention fourth and fifth graders. Participating fourth and fifth graders completed the comprehension subtest of the Gates-MacGinitie Reading Test ([GMRT] MacGinitie, MacGinitie, Maria, & Dreyer, 2000) and the Texas Assessment of Knowledge and Skills ([TAKS] Texas Education Agency [TEA], 2005a). The Reading Survey of the Motivation to Read Profile ([MRP], Gambrell, Palmer, Codling, & Mazzoni, 1996) served as another quantitative data source. Qualitative data sources included classroom observations, key informant interviews, and student journal entries. The GMRT results indicated that the intervention fourth graders demonstrated the largest growth in reading comprehension achievement. Significant differences were noted by GMRT results between the intervention and nonintervention fourth graders. A significant difference was found between fourth-grade males and females on the GMRT, with a larger gain posted by the females. No significant differences were found on the GMRT in fifth grade Reading TAKS results indicated a significant difference between intervention fourth-grade Hispanic and African American students, while fifth-grade Science TAKS results indicated no significant differences. The MRP Reading Survey results indicated no significant differences; however, fourth-grade Hispanic and fifth-grade male students demonstrated significant growth. Classroom observations documented the progress of the 12-week intervention; 9 primary instructional and

  10. Investigating the impact of teachers' implementation practices on academic achievement in science during a long-term professional development program on the Science Writing Heuristic

    NASA Astrophysics Data System (ADS)

    Gunel, Murat

    This study is a part of a bigger project known as the Science Writing Heuristic (SWH) Partnership Professional Development Project, conducted at Iowa State University and the University of Iowa in association with the Iowa Department of Education to help improve science teaching. Overall, the goal of the project is to help practicing science teachers understand and apply a student-oriented instructional approach, using the SWH. The purpose of this research study was to examine the link between teachers' implementation of a student-oriented teaching approach through the SWH approach with embedded non-traditional writing practices and students' performances on standardized tests over a 3-year period. This study investigated the impact of 6 teachers' (3 high school teachers and 3 middle school teachers) implementation of the SWH approach on student standardized test scores over the 3-year period. A mixed method approach was adopted as a research method. A major premise underpinning this study is that in the rate of change differs by teachers, and that change is not a linear process for teachers. Results of the study indicated a differential across teachers in terms of improvement in pedagogical skills related to the SWH approach. Further, results showed that the SWH approach in-service program did have an impact on participating teachers' pedagogical practices. The majority of the participating teachers improved their pedagogical practices of implementing science inquiry through the SWH approach over the 3-year period of the professional development program. Further, when teachers' rankings were correlated against students' standardized test scores, the results indicated that as their implementation levels increased their students' test achievements also increased.

  11. Impact of STS (Context-Based Type of Teaching) in Comparison With a Textbook Approach on Attitudes and Achievement in Community College Chemistry Classrooms

    NASA Astrophysics Data System (ADS)

    Perkins, Gita

    The purpose of this study was to analyze the impact of a context-based teaching approach (STS) versus a more traditional textbook approach on the attitudes and achievement of community college chemistry students. In studying attitudes toward chemistry within this study, I used a 30-item Likert scale in order to study the importance of chemistry in students' lives, the importance of chemistry, the difficulty of chemistry, interest in chemistry, and the usefulness of chemistry for their future career. Though the STS approach students had higher attitude post scores, there was no significant difference between the STS and textbook students' attitude post scores. It was noted that females had higher postattitude scores in the STS group, while males had higher postattitude scores in the textbook group. With regard to postachievement, I noted that males had higher scores in both groups. A correlation existed between postattitude and postachievement in the STS classroom. In summary, while an association between attitude and achievement was found in the STS classroom, teaching approach or sex was not found to influence attitudes, while sex was also not found to influence achievement. These results, overall, suggest that attitudes are not expected to change on the basis of either teaching approach or gender, and that techniques other than changing the teaching approach would need to be used in order to improve the attitudes of students. Qualitative analysis of an online discussion activity on Energy revealed that STS students were able to apply aspects of chemistry in decision making related to socioscientific issues. Additional analysis of interview and written responses provided insight regarding attitudes toward chemistry, with respect to topics of applicability of chemistry to life, difficulties with chemistry, teaching approach for chemistry, and the intent for enrolling in additional chemistry courses. In addition, the surveys of female students brought out

  12. Generalized Maximum Entropy

    NASA Technical Reports Server (NTRS)

    Cheeseman, Peter; Stutz, John

    2005-01-01

    A long standing mystery in using Maximum Entropy (MaxEnt) is how to deal with constraints whose values are uncertain. This situation arises when constraint values are estimated from data, because of finite sample sizes. One approach to this problem, advocated by E.T. Jaynes [1], is to ignore this uncertainty, and treat the empirically observed values as exact. We refer to this as the classic MaxEnt approach. Classic MaxEnt gives point probabilities (subject to the given constraints), rather than probability densities. We develop an alternative approach that assumes that the uncertain constraint values are represented by a probability density {e.g: a Gaussian), and this uncertainty yields a MaxEnt posterior probability density. That is, the classic MaxEnt point probabilities are regarded as a multidimensional function of the given constraint values, and uncertainty on these values is transmitted through the MaxEnt function to give uncertainty over the MaXEnt probabilities. We illustrate this approach by explicitly calculating the generalized MaxEnt density for a simple but common case, then show how this can be extended numerically to the general case. This paper expands the generalized MaxEnt concept introduced in a previous paper [3].

  13. Maximum entropy principal for transportation

    SciTech Connect

    Bilich, F.; Da Silva, R.

    2008-11-06

    In this work we deal with modeling of the transportation phenomenon for use in the transportation planning process and policy-impact studies. The model developed is based on the dependence concept, i.e., the notion that the probability of a trip starting at origin i is dependent on the probability of a trip ending at destination j given that the factors (such as travel time, cost, etc.) which affect travel between origin i and destination j assume some specific values. The derivation of the solution of the model employs the maximum entropy principle combining a priori multinomial distribution with a trip utility concept. This model is utilized to forecast trip distributions under a variety of policy changes and scenarios. The dependence coefficients are obtained from a regression equation where the functional form is derived based on conditional probability and perception of factors from experimental psychology. The dependence coefficients encode all the information that was previously encoded in the form of constraints. In addition, the dependence coefficients encode information that cannot be expressed in the form of constraints for practical reasons, namely, computational tractability. The equivalence between the standard formulation (i.e., objective function with constraints) and the dependence formulation (i.e., without constraints) is demonstrated. The parameters of the dependence-based trip-distribution model are estimated, and the model is also validated using commercial air travel data in the U.S. In addition, policy impact analyses (such as allowance of supersonic flights inside the U.S. and user surcharge at noise-impacted airports) on air travel are performed.

  14. Economic Impact Analysis: Final Revisions to the National Emission Standards for Hazardous Air Pollutants Subpart S (MACT I and MACT III) for the Pulp and Paper Industry

    EPA Pesticide Factsheets

    The purpose of this July 2012 economic impact analysis (EIA) is to present the results of the Agency’s evaluation of the cost, economic impacts, and benefits from compliance with the requirements of these Maximum Achievable Control Technologies (MACT).

  15. Vestige: Maximum likelihood phylogenetic footprinting

    PubMed Central

    Wakefield, Matthew J; Maxwell, Peter; Huttley, Gavin A

    2005-01-01

    Background Phylogenetic footprinting is the identification of functional regions of DNA by their evolutionary conservation. This is achieved by comparing orthologous regions from multiple species and identifying the DNA regions that have diverged less than neutral DNA. Vestige is a phylogenetic footprinting package built on the PyEvolve toolkit that uses probabilistic molecular evolutionary modelling to represent aspects of sequence evolution, including the conventional divergence measure employed by other footprinting approaches. In addition to measuring the divergence, Vestige allows the expansion of the definition of a phylogenetic footprint to include variation in the distribution of any molecular evolutionary processes. This is achieved by displaying the distribution of model parameters that represent partitions of molecular evolutionary substitutions. Examination of the spatial incidence of these effects across regions of the genome can identify DNA segments that differ in the nature of the evolutionary process. Results Vestige was applied to a reference dataset of the SCL locus from four species and provided clear identification of the known conserved regions in this dataset. To demonstrate the flexibility to use diverse models of molecular evolution and dissect the nature of the evolutionary process Vestige was used to footprint the Ka/Ks ratio in primate BRCA1 with a codon model of evolution. Two regions of putative adaptive evolution were identified illustrating the ability of Vestige to represent the spatial distribution of distinct molecular evolutionary processes. Conclusion Vestige provides a flexible, open platform for phylogenetic footprinting. Underpinned by the PyEvolve toolkit, Vestige provides a framework for visualising the signatures of evolutionary processes across the genome of numerous organisms simultaneously. By exploiting the maximum-likelihood statistical framework, the complex interplay between mutational processes, DNA repair and

  16. The Appropriateness of Consolidation in Illinois: A Study of the Impact of Poverty, District Type, and Size on Expenditures and Achievement

    ERIC Educational Resources Information Center

    Dunlap, James A.

    2013-01-01

    This study examined whether or not enrollment, poverty rate, and district type could be used to predict cost and achievement, as measured on the Illinois Standards Achievement Test and Prairie State Achievement Exam, at the building and district levels within the state of Illinois. This study provides quantitative data that will aid educational…

  17. Exploring the Impact of Phonological Awareness, Visual-Spatial Working Memory, and Preschool Quantity--Number Competencies on Mathematics Achievement in Elementary School: Findings from a 3-year Longitudinal Study

    ERIC Educational Resources Information Center

    Krajewski, Kristin; Schneider, Wolfgang

    2009-01-01

    This longitudinal study explored the importance of kindergarten measures of phonological awareness, working memory, and quantity-number competencies (QNC) for predicting mathematical school achievement in third graders (mean age 8 years 8 months). It was found that the impact of phonological awareness and visual-spatial working memory, assessed at…

  18. The Impact of a Project-Based Science Curriculum on Minority Student Achievement, Attitudes, and Careers: The Effects of Teacher Content and Pedagogical Content Knowledge and Inquiry-Based Practices

    ERIC Educational Resources Information Center

    Kanter, David E.; Konstantopoulos, Spyros

    2010-01-01

    Project-based science (PBS) curricula have project- and inquiry-based aspects that leverage the strengths of urban students from ethnic and racial groups underrepresented in science careers, potentially impacting positively these students' science achievement and attitudes and thus their college and career plans. We aimed to determine the extent…

  19. The Impact of a One-to-One Laptop Computer Program on the Literacy Achievement of Eighth-Grade Students with Differing Measured Cognitive Skill Levels Who Are Eligible and Not Eligible for Free or Reduced Price Lunch Program Participation

    ERIC Educational Resources Information Center

    Weber, Eric G.

    2012-01-01

    The purpose of this study was to determine the impact of a one-to-one laptop computer program on the literacy achievement of eighth-grade students with above average, average, and below average measured cognitive skill levels who are eligible and not eligible for free or reduced price lunch program participation. The study analyzed, student…

  20. First-line cART regimen impacts the course of CD8+ T-cell counts in HIV-infected patients that achieve sustained undetectable viral load.

    PubMed Central

    Poizot-Martin, Isabelle; Allavena, Clotilde; Delpierre, Cyrille; Duvivier, Claudine; Obry-Roguet, Véronique; Cano, Carla E.; Guillouet de Salvador, Francine; Rey, David; Dellamonica, Pierre; Cheret, Antoine; Cuzin, Lise; Katlama, Christine; Cabié, André; Hoen, Bruno

    2016-01-01

    Abstract The aim of the study was to investigate the impact of first-line combined antiretroviral therapy (cART) regimen on the course of CD8+ T-cell counts in human immunodeficiency virus (HIV)-infected patients. A retrospective observational study conducted on the French DAT’AIDS Cohort of HIV-infected patients. We selected 605 patients initiating a first-line cART between 2002 and 2009, and which achieved a sustained undetectable HIV plasma viral load (pVL) for at least 12 months without cART modification. The evolution of CD8+ T-cell counts according to cART regimen was assessed. CD8+ T-cell counts were assessed in 572 patients treated with 2NRTIs+1PI/r (n= 297), 2NRTIs+1NNRTI (n= 207) and 3NRTIs (n= 68). In multivariate analysis, after 12 months of follow-up, the 3NRTIs regimen was associated with a significantly smaller decrease of CD8+ T-cell count compared with NNRTI-containing regimens (–10.2 cells/μL in 3NRTIs vs –105.1 cells/μL; P=0.02) but not compared with PI-containing regimens (10.2 vs –60.9 cells/μL; P=0.21). After 24 months, the 3NRTIs regimen was associated with a smaller decrease of CD8+ T-cell count and % compared with PI/r- and NNRTI-containing regimens (0.2 in 3NRTIs vs –9.9 with PI/r-regimens, P=0.001, and vs –11.1 with NNRTI-regimens, p < 0.0001). A focus analysis on 11 patients treated with an INSTI-containing cART regimen during the study period showed after 12 months of follow-up, a median decrease of CD8+ T-cell count of –155 [inter quartile range: –302; –22] cells/μL. Our data highlight the fact that cART regimens have differential effects on CD8 pool down regulation. PMID:27741125

  1. The Impact of Substance Use and Violence/Delinquency on Academic Achievement for Groups of Middle and High School Students in Washington.

    ERIC Educational Resources Information Center

    Mandell, Dorothy J.; Hill, Sheri L.; Carter, Louise; Brandon, Richard N.

    Noting that little is known about how the social environment affects academic achievement among groups of students, this study examined the associations among substance use, violent/delinquent behavior, and academic achievement in groups of middle and high school students. Data sources for middle school students were the 1998 Washington State…

  2. The Impact of Resources on Education: A Position Paper on How Theories of Social Capital Provide Insight on the Achievement Gap in the United States Education System

    ERIC Educational Resources Information Center

    Zeisler, Kayla

    2012-01-01

    Research has shown that there is a gap in educational achievement between socioeconomic and racial groups in the public education system in the United States. This paper identifies the link between resources and academic achievement. Through examining educational resources, from in-school factors, such as facilities and teacher quality, to…

  3. WWC Review of the Report "Staying on Track: Testing Higher Achievement's Long-Term Impact on Academic Outcomes and High School Choice." What Works Clearinghouse Single Study Review

    ERIC Educational Resources Information Center

    What Works Clearinghouse, 2014

    2014-01-01

    This study of 952 fifth and sixth graders in Washington, DC, and Alexandria, Virginia, found that students who were offered the "Higher Achievement" program had higher test scores in mathematical problem solving and were more likely to be admitted to and attend private competitive high schools. "Higher Achievement" is a…

  4. The Impact of Teacher-Student Relationships and Achievement Motivation on Students' Intentions to Dropout According to Socio-Economic Status

    ERIC Educational Resources Information Center

    Bergeron, Julie; Chouinard, Roch; Janosz, Michel

    2011-01-01

    The main goal was to test if teacher-student relationships and achievement motivation are predicting dropout intention equally for low and high socio-economic status students. A questionnaire measuring teacher-student relationships and achievement motivation was administered to 2,360 French Canadian secondary students between 12 and 15 years old…

  5. The Impacts of Student-, Teacher- and School-Level Factors on Mathematics Achievement: An Exploratory Comparative Investigation of Singaporean Students and the USA Students

    ERIC Educational Resources Information Center

    Ker, H. W.

    2016-01-01

    Reports from the Trends in International Mathematics and Science Study (TIMSS) consistently show that there is a substantial gap in average mathematics achievement between Singapore and the USA. This study conducts an exploratory comparative investigation on the multilevel factors influencing the mathematics achievement of students from these two…

  6. Overview of the Special Issue: A Multi-Model Framework to Achieve Consistent Evaluation of Climate Change Impacts in the United States

    EPA Science Inventory

    The Climate Change Impacts and Risk Analysis (CIRA) project establishes a new multi-model framework to systematically assess the impacts, economic damages, and risks from climate change in the United States. The primary goal of this framework to estimate how climate change impac...

  7. Overview of the Special Issue: A Multi-Model Framework to Achieve Consistent Evaluation of Climate Change Impacts in the United States

    SciTech Connect

    Waldhoff, Stephanie T.; Martinich, Jeremy; Sarofim, Marcus; DeAngelo, B. J.; McFarland, Jim; Jantarasami, Lesley; Shouse, Kate C.; Crimmins, Allison; Ohrel, Sara; Li, Jia

    2015-07-01

    The Climate Change Impacts and Risk Analysis (CIRA) modeling exercise is a unique contribution to the scientific literature on climate change impacts, economic damages, and risk analysis that brings together multiple, national-scale models of impacts and damages in an integrated and consistent fashion to estimate climate change impacts, damages, and the benefits of greenhouse gas (GHG) mitigation actions in the United States. The CIRA project uses three consistent socioeconomic, emissions, and climate scenarios across all models to estimate the benefits of GHG mitigation policies: a Business As Usual (BAU) and two policy scenarios with radiative forcing (RF) stabilization targets of 4.5 W/m2 and 3.7 W/m2 in 2100. CIRA was also designed to specifically examine the sensitivity of results to uncertainties around climate sensitivity and differences in model structure. The goals of CIRA project are to 1) build a multi-model framework to produce estimates of multiple risks and impacts in the U.S., 2) determine to what degree risks and damages across sectors may be lowered from a BAU to policy scenarios, 3) evaluate key sources of uncertainty along the causal chain, and 4) provide information for multiple audiences and clearly communicate the risks and damages of climate change and the potential benefits of mitigation. This paper describes the motivations, goals, and design of the CIRA modeling exercise and introduces the subsequent papers in this special issue.

  8. Analysis of Photovoltaic Maximum Power Point Trackers

    NASA Astrophysics Data System (ADS)

    Veerachary, Mummadi

    The photovoltaic generator exhibits a non-linear i-v characteristic and its maximum power point (MPP) varies with solar insolation. An intermediate switch-mode dc-dc converter is required to extract maximum power from the photovoltaic array. In this paper buck, boost and buck-boost topologies are considered and a detailed mathematical analysis, both for continuous and discontinuous inductor current operation, is given for MPP operation. The conditions on the connected load values and duty ratio are derived for achieving the satisfactory maximum power point operation. Further, it is shown that certain load values, falling out of the optimal range, will drive the operating point away from the true maximum power point. Detailed comparison of various topologies for MPPT is given. Selection of the converter topology for a given loading is discussed. Detailed discussion on circuit-oriented model development is given and then MPPT effectiveness of various converter systems is verified through simulations. Proposed theory and analysis is validated through experimental investigations.

  9. Exploring the impact of phonological awareness, visual-spatial working memory, and preschool quantity-number competencies on mathematics achievement in elementary school: findings from a 3-year longitudinal study.

    PubMed

    Krajewski, Kristin; Schneider, Wolfgang

    2009-08-01

    This longitudinal study explored the importance of kindergarten measures of phonological awareness, working memory, and quantity-number competencies (QNC) for predicting mathematical school achievement in third graders (mean age 8 years 8 months). It was found that the impact of phonological awareness and visual-spatial working memory, assessed at 5 years of age, was mediated by early QNC, which predicted math achievement in third grade. Importantly, and confirming our isolated number words hypothesis, phonological awareness had no impact on higher numerical competencies (i.e., when number words needed to be linked with quantities [QNC Level II and above]) but predicted basic numerical competencies (i.e., when number words were isolated from quantities [QNC Level I]), explaining the moderate relationship between early literacy development and the development of mathematical competencies.

  10. Arctic Sea Ice Maximum 2011

    NASA Video Gallery

    AMSR-E Arctic Sea Ice: September 2010 to March 2011: Scientists tracking the annual maximum extent of Arctic sea ice said that 2011 was among the lowest ice extents measured since satellites began ...

  11. OECD Maximum Residue Limit Calculator

    EPA Pesticide Factsheets

    With the goal of harmonizing the calculation of maximum residue limits (MRLs) across the Organisation for Economic Cooperation and Development, the OECD has developed an MRL Calculator. View the calculator.

  12. An Examination of the Impact of the ASCA National Model[R] on Student Achievement at Recognized ASCA Model Program (RAMP) Elementary Schools

    ERIC Educational Resources Information Center

    Ward, Christine A.

    2009-01-01

    The No Child Left Behind Act (NCLB, 2001) requires that all schools demonstrate that their students meet or exceed expectations on various measures of academic performance. This means that stakeholders at every level of the school system, including school counselors, must demonstrate how their efforts lead to greater student achievement (Bemak,…

  13. The Impact of Using Technology on Student Achievement: Teaching Functions with the TI-Nspire to 9th Grade Algebra Students

    ERIC Educational Resources Information Center

    Buckner, Barbara Renee

    2011-01-01

    The purpose of this study was to determine the effect of TI-Nspire graphing calculator use on student achievement and on teacher behavior variables of planning, teaching, and assessing. This study investigated the teaching of functions by teachers using the TI-Nspire graphing calculator versus teachers using a non-graphing scientific calculator. …

  14. The Impact of an Advisor-Advisee Mentoring Program on the Achievement, School Engagement, and Behavior Outcomes of Rural Eighth Grade Students

    ERIC Educational Resources Information Center

    Herrick, Christopher J.

    2010-01-01

    The purpose of this exploratory two-group pretest-posttest comparative survey study was to determine the effect of a team adviser-advisee academic, behavior, and character mentoring program on the achievement, school engagement, and behavior outcomes of eighth grade students determined to be above (n = 21) and below (n = 15) eligibility guidelines…

  15. The Differential Impact of Pre-College and Self-Regulatory Factors on Academic Achievement of University Students with and without Learning Disabilities.

    ERIC Educational Resources Information Center

    Ruban, Lilia; McCoach, D. Betsy; Nora, Amaury

    Even though research on academic self-regulation has proliferated in recent years, no studies have investigated the question of whether the perceived usefulness and the use of standard self-regulated learning strategies and compensation strategies provide a differential prediction of academic achievement for college students with and without…

  16. The Impact of School Climate on Student Achievement in the Middle Schools of the Commonwealth of Virginia: A Quantitative Analysis of Existing Data

    ERIC Educational Resources Information Center

    Bergren, David Alexander

    2014-01-01

    This quantitative study was designed to be an analysis of the relationship between school climate and student achievement through the creation of an index of climate-factors (SES, discipline, attendance, and school size) for which publicly available data existed. The index that was formed served as a proxy measure of climate; it was analyzed…

  17. An Exploratory Study of the Relationship between Elementary Principals' Perceptions of Their Leadership Behaviors and the Impact on One Year of Reading Achievement Scores

    ERIC Educational Resources Information Center

    Smith, Debra

    2009-01-01

    The purpose of this study was to explore the relationship between principals' perceptions of their learning-centered leadership behaviors and one year of reading achievement scores. Perceptions of principals were gathered from 31 out of 42 elementary schools in a district located in Central Virginia. This study explored the relationship between…

  18. The Impact of Family Income on Child Achievement: Evidence from the Earned Income Tax Credit. Discussion Paper No. 1361-09

    ERIC Educational Resources Information Center

    Dahl, Gordon; Lochner, Lance

    2009-01-01

    Past estimates of the effect of family income on child development have often been plagued by endogeneity and measurement error. In this paper, we use two simulated instrumental variables strategies to estimate the causal effect of income on children's math and reading achievement. Our identification derives from the large, non-linear changes…

  19. The Impact of Differentiated Reading Homework Assignments on Students' Attitudes toward Homework, Motivation to Read, Interest in Reading, and Reading Achievement

    ERIC Educational Resources Information Center

    Hickerson, Danielle

    2012-01-01

    Previous research has indicated that there is no relationship between traditional homework completion and academic achievement among elementary grade students. Yet, elementary school teachers continue to utilize this practice. The purpose of this quantitative study was to investigate the relationship between nontraditional, differentiated reading…

  20. The Impact of Classroom Performance System-Based Instruction with Peer Instruction upon Student Achievement and Motivation in Eighth Grade Math Students

    ERIC Educational Resources Information Center

    Allison, Tracy Michelle Hunter

    2012-01-01

    The researcher employed two designs to address the research question for this particular study. This quasi-experimental non-equivalent control group study compared the math achievement of 92 eighth grade students who received Classroom Performance System (CPS)-based instruction using Peer Instruction (PI) to 76 eighth grade students who received…

  1. 21st Century Community Learning Centers 2013: A Quasi-Experimental Investigation of Program Impacts on Student Achievement in Mathematics and Reading/Language Arts

    ERIC Educational Resources Information Center

    White, Larry; Hixson, Nate

    2014-01-01

    This report summarizes an evaluation study investigating the effects of participation in the 21st Century Community Learning Centers (CCLC) program on student achievement in mathematics and reading/language arts, for the cohort of students who participated during the 2012-2013 school year. The report is a supplement to the Office of Assessment,…

  2. 21st Century Community Learning Centers 2014: A Quasi-Experimental Investigation of Program Impacts on Student Achievement in Mathematics and Reading/Language Arts

    ERIC Educational Resources Information Center

    White, Larry; Whisman, Andy

    2014-01-01

    This report summarizes an evaluation study investigating the effects of participation in the 21st Century Community Learning Centers (CCLC) program on student achievement in mathematics and reading/language arts, for the cohort of students who participated during the 2013-2014 school year. The report is a supplement to the Office of Assessment,…

  3. Commentary Regarding Bui, Craig, and Imberman (2011): "Is Gifted Education a Bright Idea? Assessing the Impacts of Gifted and Talented Programs on Achievement"

    ERIC Educational Resources Information Center

    Moon, Tonya R.

    2016-01-01

    Using data from a large southwestern school district, Bui, Craig, and Imberman investigated the effects of gifted and talented programming on middle school students' achievement and behavior (attendance and discipline) through two avenues. Using a regression discontinuity design for the first set of analyses, the authors took advantage of a…

  4. Impact of a Career Intervention on At-Risk Middle School Students' Career Maturity Levels, Academic Achievement, and Self-Esteem

    ERIC Educational Resources Information Center

    Legum, Harry L.; Hoare, Carol H.

    2004-01-01

    The purpose of this study was to assess the effects of a 9-week career intervention program on at-risk middle school students' career maturity levels, self-esteem, and academic achievement. This study was based on a pretest and posttest design using a control group. Data were collected from 27 at-risk middle school students representing the…

  5. Assessing the Impact of School-Based Health Centers on Academic Achievement and College Preparation Efforts: Using Propensity Score Matching to Assess School-Level Data in California

    ERIC Educational Resources Information Center

    Bersamin, Melina; Garbers, Samantha; Gaarde, Jenna; Santelli, John

    2016-01-01

    This study examines the association between school-based health center (SBHC) presence and school-wide measures of academic achievement and college preparation efforts. Publicly available educational and demographic data from 810 California public high schools were linked to a list of schools with an SBHC. Propensity score matching, a method to…

  6. Understanding the Effect of KIPP as It Scales: Volume I, Impacts on Achievement and Other Outcomes. Final Report of KIPP's Investing in Innovation Grant Evaluation. Executive Summary

    ERIC Educational Resources Information Center

    Tuttle, Christina Clark; Gleason, Philip; Knechtel, Virginia; Nichols-Barrer, Ira; Booker, Kevin; Chojnacki, Gregory; Coen, Thomas; Goble, Lisbeth

    2015-01-01

    KIPP (Knowledge is Power Program) is a national network of public charter schools whose stated mission is to help underserved students enroll in and graduate from college. Prior studies (see Tuttle et al. 2013) have consistently found that attending a KIPP middle school positively affects student achievement, but few have addressed longer-term…

  7. Understanding the Effect of KIPP as It Scales: Volume I, Impacts on Achievement and Other Outcomes. Final Report of KIPP's "Investing in Innovation Grant Evaluation"

    ERIC Educational Resources Information Center

    Tuttle, Christina Clark; Gleason, Philip; Knechtel, Virginia; Nichols-Barrer, Ira; Booker, Kevin; Chojnacki, Gregory; Coen, Thomas; Goble, Lisbeth

    2015-01-01

    KIPP (Knowledge is Power Program) is a national network of public charter schools whose stated mission is to help underserved students enroll in and graduate from college. Prior studies (see Tuttle et al. 2013) have consistently found that attending a KIPP middle school positively affects student achievement, but few have addressed longer-term…

  8. The Impact of Nursing Students' Chemistry Learning Performance Assessment in Taiwan: Competitive versus Non-Competitive Student Team Achievement Division Approaches

    ERIC Educational Resources Information Center

    Wang, Kai-Ping

    2012-01-01

    Purpose: The purpose of this study was to determine the effectiveness of competitive Student Team Achievement Division (STAD), non-competitive STAD, and traditional learning on chemistry learning and learning perceptions. Sample, design and methods: By adopting the STAD approach, this study examined 144 nursing students at a five-year junior…

  9. The Impact of Parental Support, Behavioral Control, and Psychological Control on the Academic Achievement and Self-Esteem of African American and European American Adolescents.

    ERIC Educational Resources Information Center

    Bean, Roy A.; Bush, Kevin R.; McKenry, Patrick C.; Wilson, Stephan M.

    2003-01-01

    Relationships between adolescent functioning and parent support, behavioral control, and psychological control were examined among European American and African American adolescents. A number of correlations were significant, including maternal support and academic achievement and self-esteem, and paternal psychological control and self-esteem.…

  10. The Impact of Montessori Teaching on Academic Achievement of Elementary School Students in a Central Texas School District: A Causal-Comparative Inquiry

    ERIC Educational Resources Information Center

    Salazar, Minerva Mungia

    2013-01-01

    Providing a meaningful and experiential learning environment for all students has long created a concern for alternate ways to teach students who are reportedly demonstrating non-mastery on state standardized assessments. As the benchmark for showing successful academic achievement increases, so does the need for discovering effective ways for…

  11. Examining the Impact of an Integrative Method of Using Technology on Students' Achievement and Efficiency of Computer Usage and on Pedagogical Procedure in Geometry

    ERIC Educational Resources Information Center

    Gurevich, Irina; Gurev, Dvora

    2012-01-01

    In the current study we follow the development of the pedagogical procedure for the course "Constructions in Geometry" that resulted from using dynamic geometry software (DGS), where the computer became an integral part of the educational process. Furthermore, we examine the influence of integrating DGS into the course on students' achievement and…

  12. A Conceptual Framework for Assessing the Impacts of GIS on the Motivation and Achievement in Geography among Underachieving Students of Smart School in Sabah, Malaysia

    ERIC Educational Resources Information Center

    Singh, Soon Singh Bikar; Kleeman, Grant; Van Bergen, Penny

    2013-01-01

    In 1988, the integrated secondary school curriculum was introduced as a continuation of the curriculum changes introduced in the primary school. These changes have impacted geography subject in the secondary school. Geography becomes a compulsory subject for lower secondary and elective subject at the upper secondary school level. As a result,…

  13. The Impact of Cooperative and Traditional Learning on the Academic Achievement of Third Grade Students in Selected Rural School Districts in Northeast, South Carolina

    ERIC Educational Resources Information Center

    Johnson, Shawn Lamont L.

    2013-01-01

    This study examined the impact that cooperative learning and traditional learning have on the academic performance of elementary school students in rural school districts. Cooperative learning is considered a typical model that can maximize the effectiveness of constructivism. Slavin (1991, p. 71) completed a synthesis of research on cooperative…

  14. Achieving equity in Medicare disproportionate share payments to rural hospitals: an assessment of the financial impact of recent and proposed changes to the disproportionate share hospital payment formula.

    PubMed

    Sutton, Janet P; Stensland, Jeffrey; Zhao, Lan; Cheng, Michael

    2002-01-01

    Historically, the Medicare Disproportionate Share Hospital (DSH) payment program has been less favorable to rural hospitals: eligibility thresholds were higher and the payment adjustment was smaller for rural than for urban hospitals. Although the Medicare, Medicaid, and SCHIP Benefit Improvement and Protection Act (BIPA) of 2000 established a uniform low-income threshold and increased the magnitude of the adjustment for certain small and rural hospitals as a means to promote payment equity, the DSH distribution formula continues to vary by location. This study examines how the DSH revisions mandated under BIPA are likely to affect rural hospitals' financial performance and simulates the financial impact of implementing a uniform DSH payment adjustment. Using data from the 1998 Medicare cost report and impact files, this study found that two-thirds of both rural and urban hospitals would have qualified for DSH payments following BIPA compared with only one-fifth of rural hospitals and one-half of urban hospitals prior to BIPA. Although the impact of BIPA revisions on rural hospitals' total margins were found to be modest, the financial impact of a uniform payment adjustment would be somewhat greater: rural hospitals' average total margins would have increased by 1.6 percentage points. Importantly, 20% of rural hospitals with negative total margins would have been "in the black" if rural and urban hospitals were reimbursed using the same DSH formula. These findings suggest that elimination of rural and urban disparities in DSH payment could strengthen the rural health care safety net.

  15. Master Principals' Perceptions of the Impact of the Arkansas Leadership Academy's Master Principal Program on Leadership Practices, School Cultures and Student Achievement

    ERIC Educational Resources Information Center

    Peer, Diana

    2012-01-01

    A qualitative dissertation study was conducted to examine the impact of the Arkansas Leadership Academy's Master Principal Program through the perspective of those who have completed the entire program and attained designation as a Master Principal. A logic model for the Master Principal Program offered a context for the study. A review of…

  16. The Impact of a Standards-Based Mathematics Curriculum on Students' Mathematics Achievement: The Case of Investigations in Number, Data, and Space

    ERIC Educational Resources Information Center

    Budak, Ayfer

    2015-01-01

    The purpose of this research is to examine the impact of a Standards-based elementary mathematics curriculum on third grade students' mathematics performance. A total of 707 students participated in this study. Of this total, 368 students were from eight schools located within the same school district in a racially and ethnically diverse large…

  17. An Assessment of the Impact of a Science Outreach Program, Science In Motion, on Student Achievement, Teacher Efficacy, and Teacher Perception

    ERIC Educational Resources Information Center

    Herring, Phillip Allen

    2009-01-01

    The purpose of the study was to analyze the science outreach program, Science In Motion (SIM), located in Mobile, Alabama. This research investigated what impact the SIM program has on student cognitive functioning and teacher efficacy and also investigated teacher perceptions and attitudes regarding the program. To investigate student…

  18. Preparation, Practice, and Performance: An Empirical Examination of the Impact of Standards-Based Instruction on Secondary Students' Math and Science Achievement

    ERIC Educational Resources Information Center

    Thompson, Carla J.

    2009-01-01

    For almost two decades proponents of educational reform have advocated the use of standards-based education in maths and science classrooms for improving teacher practices, increasing student learning, and raising the quality of maths and science instruction. This study empirically examined the impact of specific standards-based teacher…

  19. Convex Accelerated Maximum Entropy Reconstruction

    PubMed Central

    Worley, Bradley

    2016-01-01

    Maximum entropy (MaxEnt) spectral reconstruction methods provide a powerful framework for spectral estimation of nonuniformly sampled datasets. Many methods exist within this framework, usually defined based on the magnitude of a Lagrange multiplier in the MaxEnt objective function. An algorithm is presented here that utilizes accelerated first-order convex optimization techniques to rapidly and reliably reconstruct nonuniformly sampled NMR datasets using the principle of maximum entropy. This algorithm – called CAMERA for Convex Accelerated Maximum Entropy Reconstruction Algorithm – is a new approach to spectral reconstruction that exhibits fast, tunable convergence in both constant-aim and constant-lambda modes. A high-performance, open source NMR data processing tool is described that implements CAMERA, and brief comparisons to existing reconstruction methods are made on several example spectra. PMID:26894476

  20. Maximum Entropy Guide for BSS

    NASA Astrophysics Data System (ADS)

    Górriz, J. M.; Puntonet, C. G.; Medialdea, E. G.; Rojas, F.

    2005-11-01

    This paper proposes a novel method for Blindly Separating unobservable independent component (IC) Signals (BSS) based on the use of a maximum entropy guide (MEG). The paper also includes a formal proof on the convergence of the proposed algorithm using the guiding operator, a new concept in the genetic algorithm (GA) scenario. The Guiding GA (GGA) presented in this work, is able to extract IC with faster rate than the previous ICA algorithms, based on maximum entropy contrast functions, as input space dimension increases. It shows significant accuracy and robustness than the previous approaches in any case.

  1. The supplemental instruction program: Student perceptions of the learning environment and impact on student academic achievement in college science at California State University, San Marcos

    NASA Astrophysics Data System (ADS)

    Hizer, Suzanne Elizabeth

    Higher education in science has been criticized and calls to increase student learning and persistence to degree has been recognized as a national problem by the Department of Education, the National Science Foundation, the National Research Council, and the National Academy of Sciences. One mode of academic assistance that may directly address this issue is the implementation of Supplemental Instruction (SI) in science courses. SI is a specific model of academic assistance designed to help students in historically difficult science classes master course content, thus increasing their academic achievement and retention. This study assessed the SI program at California State University, San Marcos, in supported science courses. Specifically, academic achievement based on final course grades were compared between SI participating and nonparticipating students, multiple affective factors were measured at the beginning and end of the semester, and students' perceptions of the classroom and SI session learning environments recorded. Overall, students who attended five or more SI sessions achieved higher final course grades. Students who chose to participate in SI had higher initial levels of responsibility and anxiety. Additionally, SI participants experienced a reduction in anxiety over the semester whereas nonparticipants experienced an increase in anxiety from beginning to the end of the semester. The learning environment of SI embodies higher levels of constructivist principles of active learning such as cooperation, cohesiveness, innovation, and personalization---with one exception for the physics course, which is a based on problem-based learning. Structural equation modeling of variables indicates that high self-efficacy at the end of the semester is directly related to high final course grades; this is mediated by cohesion in the classroom and the cooperation evidenced in SI sessions. These findings are elaborated by student descriptions of what happened in SI

  2. Sharing Leadership Responsibilities Results in Achievement Gains

    ERIC Educational Resources Information Center

    Armistead, Lew

    2010-01-01

    Collective, not individual, leadership in schools has a greater impact on student achievement; when principals and teachers share leadership responsibilities, student achievement is higher; and schools having high student achievement also display a vision for student achievement and teacher growth. Those are just a few of the insights into school…

  3. The Maximum Density of Water.

    ERIC Educational Resources Information Center

    Greenslade, Thomas B., Jr.

    1985-01-01

    Discusses a series of experiments performed by Thomas Hope in 1805 which show the temperature at which water has its maximum density. Early data cast into a modern form as well as guidelines and recent data collected from the author provide background for duplicating Hope's experiments in the classroom. (JN)

  4. The maximum rate of mammal evolution

    NASA Astrophysics Data System (ADS)

    Evans, Alistair R.; Jones, David; Boyer, Alison G.; Brown, James H.; Costa, Daniel P.; Ernest, S. K. Morgan; Fitzgerald, Erich M. G.; Fortelius, Mikael; Gittleman, John L.; Hamilton, Marcus J.; Harding, Larisa E.; Lintulaakso, Kari; Lyons, S. Kathleen; Okie, Jordan G.; Saarinen, Juha J.; Sibly, Richard M.; Smith, Felisa A.; Stephens, Patrick R.; Theodor, Jessica M.; Uhen, Mark D.

    2012-03-01

    How fast can a mammal evolve from the size of a mouse to the size of an elephant? Achieving such a large transformation calls for major biological reorganization. Thus, the speed at which this occurs has important implications for extensive faunal changes, including adaptive radiations and recovery from mass extinctions. To quantify the pace of large-scale evolution we developed a metric, clade maximum rate, which represents the maximum evolutionary rate of a trait within a clade. We applied this metric to body mass evolution in mammals over the last 70 million years, during which multiple large evolutionary transitions occurred in oceans and on continents and islands. Our computations suggest that it took a minimum of 1.6, 5.1, and 10 million generations for terrestrial mammal mass to increase 100-, and 1,000-, and 5,000-fold, respectively. Values for whales were down to half the length (i.e., 1.1, 3, and 5 million generations), perhaps due to the reduced mechanical constraints of living in an aquatic environment. When differences in generation time are considered, we find an exponential increase in maximum mammal body mass during the 35 million years following the Cretaceous-Paleogene (K-Pg) extinction event. Our results also indicate a basic asymmetry in macroevolution: very large decreases (such as extreme insular dwarfism) can happen at more than 10 times the rate of increases. Our findings allow more rigorous comparisons of microevolutionary and macroevolutionary patterns and processes.

  5. The maximum rate of mammal evolution.

    PubMed

    Evans, Alistair R; Jones, David; Boyer, Alison G; Brown, James H; Costa, Daniel P; Ernest, S K Morgan; Fitzgerald, Erich M G; Fortelius, Mikael; Gittleman, John L; Hamilton, Marcus J; Harding, Larisa E; Lintulaakso, Kari; Lyons, S Kathleen; Okie, Jordan G; Saarinen, Juha J; Sibly, Richard M; Smith, Felisa A; Stephens, Patrick R; Theodor, Jessica M; Uhen, Mark D

    2012-03-13

    How fast can a mammal evolve from the size of a mouse to the size of an elephant? Achieving such a large transformation calls for major biological reorganization. Thus, the speed at which this occurs has important implications for extensive faunal changes, including adaptive radiations and recovery from mass extinctions. To quantify the pace of large-scale evolution we developed a metric, clade maximum rate, which represents the maximum evolutionary rate of a trait within a clade. We applied this metric to body mass evolution in mammals over the last 70 million years, during which multiple large evolutionary transitions occurred in oceans and on continents and islands. Our computations suggest that it took a minimum of 1.6, 5.1, and 10 million generations for terrestrial mammal mass to increase 100-, and 1,000-, and 5,000-fold, respectively. Values for whales were down to half the length (i.e., 1.1, 3, and 5 million generations), perhaps due to the reduced mechanical constraints of living in an aquatic environment. When differences in generation time are considered, we find an exponential increase in maximum mammal body mass during the 35 million years following the Cretaceous-Paleogene (K-Pg) extinction event. Our results also indicate a basic asymmetry in macroevolution: very large decreases (such as extreme insular dwarfism) can happen at more than 10 times the rate of increases. Our findings allow more rigorous comparisons of microevolutionary and macroevolutionary patterns and processes.

  6. Impacts of air pollution on cultural heritage corrosion at European level: What has been achieved and what are the future scenarios.

    PubMed

    Di Turo, Francesca; Proietti, Chiara; Screpanti, Augusto; Fornasier, M Francesca; Cionni, Irene; Favero, Gabriele; De Marco, Alessandra

    2016-11-01

    The interaction of pollutants with Cultural Heritage materials leads to artworks and materials degradation and loss, causing an unpriceless damage. This works aims to estimate the impacts of air pollution and meteorological conditions on limestone, copper and bronze and represents the European risk assessment for corrosion of Cultural Heritage materials. The measures and policies for atmospheric pollution reduction have cut off the SO2 concentration and consequently its impact on materials is drastically reduced. Indeed, in 1980 the number of UNESCO sites in danger was extremely high (94% for limestone, 54% for copper and 1% for bronze) while in 2010 these sites did not exceed the tolerable value of surface recession and corrosion. However, some problem related to air pollution persists. In particular, Random Forest Analysis (RFA), highlights PM10 as the main responsible for materials corrosion, in 2010. Two scenarios in 2030 have been tested, highlighting that the corrosion levels of limestone, copper and bronze exceed the tolerable limits only in the Balkan area and Turkey. Our results show the importance in the air quality modelling as a powerful tool for the UNESCO sites conservation.

  7. Estimates of the maximum time required to originate life

    NASA Technical Reports Server (NTRS)

    Oberbeck, Verne R.; Fogleman, Guy

    1989-01-01

    Fossils of the oldest microorganisms exist in 3.5 billion year old rocks and there is indirect evidence that life may have existed 3.8 billion years ago (3.8 Ga). Impacts able to destroy life or interrupt prebiotic chemistry may have occurred after 3.5 Ga. If large impactors vaporized the oceans, sterilized the planets, and interfered with the origination of life, life must have originated in the time interval between these impacts which increased with geologic time. Therefore, the maximum time required for the origination of life is the time that occurred between sterilizing impacts just before 3.8 Ga or 3.5 Ga, depending upon when life first appeared on earth. If life first originated 3.5 Ga, and impacts with kinetic energies between 2 x 10 the the 34th and 2 x 10 to the 35th were able to vaporize the oceans, using the most probable impact flux, it is found that the maximum time required to originate life would have been 67 to 133 million years (My). If life originated 3.8 Ga, the maximum time to originate life was 2.5 to 11 My. Using a more conservative estimate for the flux of impacting objects before 3.8 Ga, a maximum time of 25 My was found for the same range of impactor kinetic energies. The impact model suggests that it is possible that life may have originated more than once.

  8. Solar maximum: Solar array degradation

    NASA Technical Reports Server (NTRS)

    Miller, T.

    1985-01-01

    The 5-year in-orbit power degradation of the silicon solar array aboard the Solar Maximum Satellite was evaluated. This was the first spacecraft to use Teflon R FEP as a coverglass adhesive, thus avoiding the necessity of an ultraviolet filter. The peak power tracking mode of the power regulator unit was employed to ensure consistent maximum power comparisons. Telemetry was normalized to account for the effects of illumination intensity, charged particle irradiation dosage, and solar array temperature. Reference conditions of 1.0 solar constant at air mass zero and 301 K (28 C) were used as a basis for normalization. Beginning-of-life array power was 2230 watts. Currently, the array output is 1830 watts. This corresponds to a 16 percent loss in array performance over 5 years. Comparison of Solar Maximum Telemetry and predicted power levels indicate that array output is 2 percent less than predictions based on an annual 1.0 MeV equivalent election fluence of 2.34 x ten to the 13th power square centimeters space environment.

  9. The impact of focused, long-term, and collaborative professional development in math and science participants' self-efficacy, classroom practice, and student achievement

    NASA Astrophysics Data System (ADS)

    Nottingham, Mary E.

    The purpose of this study was to investigate the impact of a 2-year professional development model in math and science on the self-efficacy of the teacher and its effects on teacher practice and student outcomes. Further, this study sought to incorporate the instructional use of Inquiry-Based Learning methods of Problem-Based Learning, Japanese Lesson Study, and Action Research. Additionally, this study examined the impacts of these interventions on teacher efficacy and student outcomes. Thirty-eight collaborating participants were purposefully selected by the Math and Science Teacher Academy (MASTA) project grant co-directors because of their content-focused classrooms of mathematics and science. This quasi-experimental study included mathematics and science in-service teachers working on their masters in education. The 2-year, bi-monthly professional development model included collaborating Inquiry-Based Learning communities with in-depth focus on Japanese Lesson Study, Problem-Based Learning instruction, and Action Research. A chi-square analysis was conducted by grade on the difference in passing rate from the Texas Assessment of Knowledge and Skills mathematics and science tests between the MASTA participants and the state passing average. In mathematics there were significant v differences only at grades 3 and 7 where the state passing average was significantly higher than the MASTA students' passing rate. Only at grade 5 was the MASTA students' passing rate higher than the state, but the difference was not significantly different. The science passing rate received from three grade 5 MASTA participants was compared to the state average and a chi-squared was conducted. Although the passing rate for the grade 5 science test was 6% higher for MASTA student that the state, the difference was not statistically significant. However, after analyzing the qualitative participant responses from data gathered during the 2-year MASTA grant the data clearly reflected that

  10. Impact of an acute coronary syndrome pathway in achieving target heart rate and utilization of evidence-based doses of beta-blockers.

    PubMed

    Irani, Farzan; Herial, Nabeel; Colyer, William R

    2012-11-01

    Beta-blockers remain a cornerstone of therapy in the management of acute coronary syndrome (ACS). The 2007 American College of Cardiology/American Heart Association unstable angina/non-ST elevation myocardial infarction guideline revisions recommend a target heart rate (HR) of 50-60 beats per minute (bpm). Despite improved trends toward utilization of beta-blockers therapy, beta-blockers continue to be underdosed. Guideline-based tools have been shown to improve adherence to evidence-based therapy in patients with ACS. Implementation of a standardized ACS pathway would lead to titration of beta-blockers to recommended dosages with improved HRs in eligible patients. The ACS clinical protocol was implemented at the University of Toledo Medical Center in May 2007. A retrospective study of 516 patients admitted during a comparable 6-month period, before and after the institution of the protocol, was conducted. The preprotocol and protocol group included 237 and 279 patients, respectively. Patient information extracted from the medical records included age, gender, HR on admission, blood pressure on admission, duration of hospital stay, preadmission use of beta-blocker, type of beta-blocker and dosage, discharge beta-blocker and dosage, peak troponin levels, and therapeutic intervention. A target HR of less than 60 bpm was achieved in 19% of the protocol group, as compared with 6% in the preprotocol group (P < 0.001). The protocol group had a significantly lower mean discharge HR than the preprotocol group (67 vs. 74 bpm; P < 0.001). The mean discharge dose of metoprolol in the protocol group was noted to be significantly higher (118 vs. 80 mg/d; P < 0.001). The institution of an ACS clinical pathway led to utilization of beta-blockers in significantly higher dosages, resulting in improved HR control and increased attainment of target HR.

  11. The impact of nursing students' chemistry learning performance assessment in Taiwan: competitive versus non-competitive student team achievement division approaches

    NASA Astrophysics Data System (ADS)

    Wang, Kai-Ping

    2012-07-01

    Purpose: The purpose of this study was to determine the effectiveness of competitive Student Team Achievement Division (STAD), non-competitive STAD, and traditional learning on chemistry learning and learning perceptions. Sample, design and methods: By adopting the STAD approach, this study examined 144 nursing students at a five-year junior college in northern Taiwan during the first semester (totaling 18 weeks) of the 2008 academic year. Results: The findings reveal that both a heterogeneous group with external pressure (involving competitive STAD) and a friendship group with affective pressure (involving traditional learning) enhance group cohesion and assist students' meaningful learning; the heterogeneous group without extra pressure (involving non-competitive STAD), by contrast, fails because of apathy and lassitude. Moreover, learning effectiveness will obviously predominate until the learning strategy continues for a long period or at least one semester. Conclusions: This study revealed that the learning performance level of the competitive STAD group is significantly different from that of the non-competitive STAD group; and the learning performance level of the traditional group is significantly different from that of the non-competitive STAD group. Both the competitive STAD group and traditional group of medium ability students are significantly different from the non-competitive STAD group. Low-ability students from the competitive STAD group are significantly different from those of the non-competitive STAD, though no significant differences were found in learning perception. However, both a lack of friendship and a lack of ability in using algorithms may affect students' chemistry learning. Furthermore, gender imbalance, educational culture, and group emotions are factors that may influence student learning performance. Further study should focus on the use of grouping, improve responsibility in group discussion, and investigate group interaction

  12. Graded Achievement, Tested Achievement, and Validity

    ERIC Educational Resources Information Center

    Brookhart, Susan M.

    2015-01-01

    Twenty-eight studies of grades, over a century, were reviewed using the argument-based approach to validity suggested by Kane as a theoretical framework. The review draws conclusions about the meaning of graded achievement, its relation to tested achievement, and changes in the construct of graded achievement over time. "Graded…

  13. An assessment of the impact of a science outreach program, Science In Motion, on student achievement, teacher efficacy, and teacher perception

    NASA Astrophysics Data System (ADS)

    Herring, Phillip Allen

    The purpose of the study was to analyze the science outreach program, Science In Motion (SIM), located in Mobile, Alabama. This research investigated what impact the SIM program has on student cognitive functioning and teacher efficacy and also investigated teacher perceptions and attitudes regarding the program. To investigate student cognitive functioning, data were collected from the Mobile County Public School System based upon student performance on Criterion Referenced Tests (CRT's), consisting of the students' average score, percent of students passing the test (students scoring 60 percent or above), and the percent of students who were considered proficient, (students scoring 70 percent or above). The researcher hypothesized that (1) the students of teachers who participate in the SIM program would have statistically significant higher scores on their science CRT's than students of the same teacher prior to the teacher's participation in the SIM program, (2) students of science teachers who participate in the SIM program would have statistically significant higher scores on their science CRT's than students of science teachers who do not participate in the SIM program, and (3) teachers who participate in the SIM program would have a higher efficacy, as measured on the Teachers' Sense of Efficacy Scale developed by Tschnnen-Moran & Hoy (2001), than science teachers who do not participate in the SIM program. Statistical significant differences at the p < .05 level were found for all research hypotheses except for hypothesis 3. No statistical significant differences were found between the efficacy of teachers who participate in the SIM program and those who do not participate. The researcher also investigated whether or not being involved in the SIM program affected the participating teachers' perspectives towards teaching science, funding of the science laboratory, and high stakes science testing and accountability. A phenomenological qualitative study was

  14. Maximum life spur gear design

    NASA Technical Reports Server (NTRS)

    Savage, M.; Mackulin, M. J.; Coe, H. H.; Coy, J. J.

    1991-01-01

    Optimization procedures allow one to design a spur gear reduction for maximum life and other end use criteria. A modified feasible directions search algorithm permits a wide variety of inequality constraints and exact design requirements to be met with low sensitivity to initial guess values. The optimization algorithm is described, and the models for gear life and performance are presented. The algorithm is compact and has been programmed for execution on a desk top computer. Two examples are presented to illustrate the method and its application.

  15. Maximum organic carbon limits at different melter feed rates (U)

    SciTech Connect

    Choi, A.S.

    1995-12-31

    This report documents the results of a study to assess the impact of varying melter feed rates on the maximum total organic carbon (TOC) limits allowable in the DWPF melter feed. Topics discussed include: carbon content; feed rate; feed composition; melter vapor space temperature; combustion and dilution air; off-gas surges; earlier work on maximum TOC; overview of models; and the results of the work completed.

  16. Feedback Limits to Maximum Seed Masses of Black Holes

    NASA Astrophysics Data System (ADS)

    Pacucci, Fabio; Natarajan, Priyamvada; Ferrara, Andrea

    2017-02-01

    The most massive black holes observed in the universe weigh up to ∼1010 M ⊙, nearly independent of redshift. Reaching these final masses likely required copious accretion and several major mergers. Employing a dynamical approach that rests on the role played by a new, relevant physical scale—the transition radius—we provide a theoretical calculation of the maximum mass achievable by a black hole seed that forms in an isolated halo, one that scarcely merged. Incorporating effects at the transition radius and their impact on the evolution of accretion in isolated halos, we are able to obtain new limits for permitted growth. We find that large black hole seeds (M • ≳ 104 M ⊙) hosted in small isolated halos (M h ≲ 109 M ⊙) accreting with relatively small radiative efficiencies (ɛ ≲ 0.1) grow optimally in these circumstances. Moreover, we show that the standard M •–σ relation observed at z ∼ 0 cannot be established in isolated halos at high-z, but requires the occurrence of mergers. Since the average limiting mass of black holes formed at z ≳ 10 is in the range 104–6 M ⊙, we expect to observe them in local galaxies as intermediate-mass black holes, when hosted in the rare halos that experienced only minor or no merging events. Such ancient black holes, formed in isolation with subsequent scant growth, could survive, almost unchanged, until present.

  17. Physically constrained maximum likelihood mode filtering.

    PubMed

    Papp, Joseph C; Preisig, James C; Morozov, Andrey K

    2010-04-01

    Mode filtering is most commonly implemented using the sampled mode shapes or pseudoinverse algorithms. Buck et al. [J. Acoust. Soc. Am. 103, 1813-1824 (1998)] placed these techniques in the context of a broader maximum a posteriori (MAP) framework. However, the MAP algorithm requires that the signal and noise statistics be known a priori. Adaptive array processing algorithms are candidates for improving performance without the need for a priori signal and noise statistics. A variant of the physically constrained, maximum likelihood (PCML) algorithm [A. L. Kraay and A. B. Baggeroer, IEEE Trans. Signal Process. 55, 4048-4063 (2007)] is developed for mode filtering that achieves the same performance as the MAP mode filter yet does not need a priori knowledge of the signal and noise statistics. The central innovation of this adaptive mode filter is that the received signal's sample covariance matrix, as estimated by the algorithm, is constrained to be that which can be physically realized given a modal propagation model and an appropriate noise model. Shallow water simulation results are presented showing the benefit of using the PCML method in adaptive mode filtering.

  18. Studying Maximum Plantar Stress per Insole Design Using Foot CT-Scan Images of Hyperelastic Soft Tissues

    PubMed Central

    Sarikhani, Ali; Motalebizadeh, Abbas; Kamali Doost Azad, Babak

    2016-01-01

    The insole shape and the resulting plantar stress distribution have a pivotal impact on overall health. In this paper, by Finite Element Method, maximum stress value and stress distribution of plantar were studied for different insoles designs, which are the flat surface and the custom-molded (conformal) surface. Moreover, insole thickness, heel's height, and different materials were used to minimize the maximum stress and achieve the most uniform stress distribution. The foot shape and its details used in this paper were imported from online CT-Scan images. Results show that the custom-molded insole reduced maximum stress 40% more than the flat surface insole. Upon increase of thickness in both insole types, stress distribution becomes more uniform and maximum stress value decreases up to 10%; however, increase of thickness becomes ineffective above a threshold of 1 cm. By increasing heel height (degree of insole), maximum stress moves from heel to toes and becomes more uniform. Therefore, this scenario is very helpful for control of stress in 0.2° to 0.4° degrees for custom-molded insole and over 1° for flat insole. By changing the material of the insole, the value of maximum stress remains nearly constant. The custom-molded (conformal) insole which has 0.5 to 1 cm thickness and 0.2° to 0.4° degrees is found to be the most compatible form for foot. PMID:27843284

  19. System for Memorizing Maximum Values

    NASA Technical Reports Server (NTRS)

    Bozeman, Richard J., Jr. (Inventor)

    1996-01-01

    The invention discloses a system capable of memorizing maximum sensed values. The system includes conditioning circuitry which receives the analog output signal from a sensor transducer. The conditioning circuitry rectifies and filters the analog signal and provides an input signal to a digital driver, which may be either liner or logarithmic. The driver converts the analog signal to discrete digital values, which in turn triggers an output signal on one of a plurality of driver output lines n. The particular output lines selected is dependent on the converted digital value. A microfuse memory device connects across the driver output lines, with n segments. Each segment is associated with one driver output line, and includes a microfuse that is blown when a signal appears on the associated driver output line.

  20. The strong maximum principle revisited

    NASA Astrophysics Data System (ADS)

    Pucci, Patrizia; Serrin, James

    In this paper we first present the classical maximum principle due to E. Hopf, together with an extended commentary and discussion of Hopf's paper. We emphasize the comparison technique invented by Hopf to prove this principle, which has since become a main mathematical tool for the study of second order elliptic partial differential equations and has generated an enormous number of important applications. While Hopf's principle is generally understood to apply to linear equations, it is in fact also crucial in nonlinear theories, such as those under consideration here. In particular, we shall treat and discuss recent generalizations of the strong maximum principle, and also the compact support principle, for the case of singular quasilinear elliptic differential inequalities, under generally weak assumptions on the quasilinear operators and the nonlinearities involved. Our principal interest is in necessary and sufficient conditions for the validity of both principles; in exposing and simplifying earlier proofs of corresponding results; and in extending the conclusions to wider classes of singular operators than previously considered. The results have unexpected ramifications for other problems, as will develop from the exposition, e.g. two point boundary value problems for singular quasilinear ordinary differential equations (Sections 3 and 4); the exterior Dirichlet boundary value problem (Section 5); the existence of dead cores and compact support solutions, i.e. dead cores at infinity (Section 7); Euler-Lagrange inequalities on a Riemannian manifold (Section 9); comparison and uniqueness theorems for solutions of singular quasilinear differential inequalities (Section 10). The case of p-regular elliptic inequalities is briefly considered in Section 11.

  1. 20 CFR 228.14 - Family maximum.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Family maximum. 228.14 Section 228.14... SURVIVOR ANNUITIES The Tier I Annuity Component § 228.14 Family maximum. (a) Family maximum defined. Under... person's earnings record is limited. This limited amount is called the family maximum. The family...

  2. 20 CFR 229.48 - Family maximum.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... used for determining the monthly maximum for the following year. (c) Disability family maximum. If an... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Family maximum. 229.48 Section 229.48... OVERALL MINIMUM GUARANTEE Computation of the Overall Minimum Rate § 229.48 Family maximum. (a)...

  3. 20 CFR 228.14 - Family maximum.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Family maximum. 228.14 Section 228.14... SURVIVOR ANNUITIES The Tier I Annuity Component § 228.14 Family maximum. (a) Family maximum defined. Under... person's earnings record is limited. This limited amount is called the family maximum. The family...

  4. The maximum drag reduction asymptote

    NASA Astrophysics Data System (ADS)

    Choueiri, George H.; Hof, Bjorn

    2015-11-01

    Addition of long chain polymers is one of the most efficient ways to reduce the drag of turbulent flows. Already very low concentration of polymers can lead to a substantial drag and upon further increase of the concentration the drag reduces until it reaches an empirically found limit, the so called maximum drag reduction (MDR) asymptote, which is independent of the type of polymer used. We here carry out a detailed experimental study of the approach to this asymptote for pipe flow. Particular attention is paid to the recently observed state of elasto-inertial turbulence (EIT) which has been reported to occur in polymer solutions at sufficiently high shear. Our results show that upon the approach to MDR Newtonian turbulence becomes marginalized (hibernation) and eventually completely disappears and is replaced by EIT. In particular, spectra of high Reynolds number MDR flows are compared to flows at high shear rates in small diameter tubes where EIT is found at Re < 100. The research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7/2007-2013) under REA grant agreement n° [291734].

  5. Maximum entropy production in daisyworld

    NASA Astrophysics Data System (ADS)

    Maunu, Haley A.; Knuth, Kevin H.

    2012-05-01

    Daisyworld was first introduced in 1983 by Watson and Lovelock as a model that illustrates how life can influence a planet's climate. These models typically involve modeling a planetary surface on which black and white daisies can grow thus influencing the local surface albedo and therefore also the temperature distribution. Since then, variations of daisyworld have been applied to study problems ranging from ecological systems to global climate. Much of the interest in daisyworld models is due to the fact that they enable one to study self-regulating systems. These models are nonlinear, and as such they exhibit sensitive dependence on initial conditions, and depending on the specifics of the model they can also exhibit feedback loops, oscillations, and chaotic behavior. Many daisyworld models are thermodynamic in nature in that they rely on heat flux and temperature gradients. However, what is not well-known is whether, or even why, a daisyworld model might settle into a maximum entropy production (MEP) state. With the aim to better understand these systems, this paper will discuss what is known about the role of MEP in daisyworld models.

  6. Designing Personalized Spaces that Impact Student Achievement

    ERIC Educational Resources Information Center

    Fielding, Randy

    2009-01-01

    "Yes we can!" Those famous three words of the Obama campaign could serve as the theme for the culture of hope and excellence at the Cristo Rey Jesuit High School in Minneapolis, Minnesota. Many of the students arrive in the 9th grade with reading and math skills at an early elementary school level. Others lack the basic life skills to…

  7. International Women's Year: Impact and Achievements

    ERIC Educational Resources Information Center

    Sipila, Helvi

    1975-01-01

    An overview of the International Women's Year, 1975, the World Conference of the International Women's Year, the World Plan of Action for the Implementation of the Objectives of the International Women's Year, and a Declaration of Principles adopted by the World Conference is presented. (LH)

  8. The Sherpa Maximum Likelihood Estimator

    NASA Astrophysics Data System (ADS)

    Nguyen, D.; Doe, S.; Evans, I.; Hain, R.; Primini, F.

    2011-07-01

    A primary goal for the second release of the Chandra Source Catalog (CSC) is to include X-ray sources with as few as 5 photon counts detected in stacked observations of the same field, while maintaining acceptable detection efficiency and false source rates. Aggressive source detection methods will result in detection of many false positive source candidates. Candidate detections will then be sent to a new tool, the Maximum Likelihood Estimator (MLE), to evaluate the likelihood that a detection is a real source. MLE uses the Sherpa modeling and fitting engine to fit a model of a background and source to multiple overlapping candidate source regions. A background model is calculated by simultaneously fitting the observed photon flux in multiple background regions. This model is used to determine the quality of the fit statistic for a background-only hypothesis in the potential source region. The statistic for a background-plus-source hypothesis is calculated by adding a Gaussian source model convolved with the appropriate Chandra point spread function (PSF) and simultaneously fitting the observed photon flux in each observation in the stack. Since a candidate source may be located anywhere in the field of view of each stacked observation, a different PSF must be used for each observation because of the strong spatial dependence of the Chandra PSF. The likelihood of a valid source being detected is a function of the two statistics (for background alone, and for background-plus-source). The MLE tool is an extensible Python module with potential for use by the general Chandra user.

  9. Maximum nonlocality in the (3,2,2) scenario

    NASA Astrophysics Data System (ADS)

    López-Rosa, Sheila; Xu, Zhen-Peng; Cabello, Adán

    2016-12-01

    We identify the simplest combinations of entanglement and incompatibility giving the maximum quantum violation for each of the 46 classes of tight Bell inequalities for the (3,2,2) scenario, i.e., three parties, two measurements per party, and two outcomes per measurement. This allows us to classify the maximum quantum nonlocality according to the simplest resources needed to achieve it. We show that entanglement and incompatibility only produce maximum nonlocality when they are combined in specific ways. For each entanglement class there is, in most cases, just one incompatibility class leading to maximum nonlocality. We also identify two interesting cases. We show that the maximum quantum violation of Śliwa inequality 23 only occurs when the third party measures the identity, so nonlocality cannot increase when we add a third party to the bipartite case. Almost quantum correlations predict that adding a new party increases nonlocality. This points out that either almost quantum correlations violate a fundamental principle or that there is a form of tripartite entanglement which quantum theory cannot account for. The other interesting case is the maximum quantum violation of Śliwa inequality 26, which, like the Mermin inequality, requires maximum incompatibility for all parties. In contrast, it requires a specific entangled state which has the same tripartite negativity as the W state.

  10. Leader as achiever.

    PubMed

    Dienemann, Jacqueline

    2002-01-01

    This article examines one outcome of leadership: productive achievement. Without achievement one is judged to not truly be a leader. Thus, the ideal leader must be a visionary, a critical thinker, an expert, a communicator, a mentor, and an achiever of organizational goals. This article explores the organizational context that supports achievement, measures of quality nursing care, fiscal accountability, leadership development, rewards and punishments, and the educational content and teaching strategies to prepare graduates to be achievers.

  11. Designing-and Redesigning-Information Services for Maximum Impact.

    ERIC Educational Resources Information Center

    Jones, Rebecca; Dysart, Jane

    2002-01-01

    Discusses innovative information services, including new services and the redesign of existing services. Describes the development process, including assessing the market and developing a marketing plan; and explains the implementation process, including monitoring client satisfaction and quality control. (LRW)

  12. Vegetation Impacts on Maximum and Minimum Temperatures in Northeast Colorado

    DTIC Science & Technology

    2007-11-02

    National Center for Atmospheric Research (NCEP-NCAR) reanalysis, and satellite-derived greenness values, as defined by NDVI (Normalized Difference Vegetation...temperature and NDVI values. The subtraction shows that by including NDVI values in the analysis, the r-squared values, and thus the degree of explanation of

  13. Comparing Science Achievement Constructs: Targeted and Achieved

    ERIC Educational Resources Information Center

    Ferrara, Steve; Duncan, Teresa

    2011-01-01

    This article illustrates how test specifications based solely on academic content standards, without attention to other cognitive skills and item response demands, can fall short of their targeted constructs. First, the authors inductively describe the science achievement construct represented by a statewide sixth-grade science proficiency test.…

  14. 5 CFR 9701.312 - Maximum rates.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 3 2014-01-01 2014-01-01 false Maximum rates. 9701.312 Section 9701.312... MANAGEMENT SYSTEM Pay and Pay Administration Overview of Pay System § 9701.312 Maximum rates. (a) DHS may not... Schedule, except as provided in paragraph (b) of this section. (b) DHS may establish the maximum...

  15. 5 CFR 9701.312 - Maximum rates.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 3 2013-01-01 2013-01-01 false Maximum rates. 9701.312 Section 9701.312... MANAGEMENT SYSTEM Pay and Pay Administration Overview of Pay System § 9701.312 Maximum rates. (a) DHS may not... Schedule, except as provided in paragraph (b) of this section. (b) DHS may establish the maximum...

  16. 34 CFR 674.12 - Loan maximums.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 34 Education 3 2012-07-01 2012-07-01 false Loan maximums. 674.12 Section 674.12 Education..., DEPARTMENT OF EDUCATION FEDERAL PERKINS LOAN PROGRAM General Provisions § 674.12 Loan maximums. (a) The maximum annual amount of Federal Perkins Loans and NDSLs an eligible student may borrow is— (1) $5,500...

  17. 20 CFR 229.48 - Family maximum.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Family maximum. 229.48 Section 229.48... OVERALL MINIMUM GUARANTEE Computation of the Overall Minimum Rate § 229.48 Family maximum. (a) Family... month on one person's earnings record is limited. This limited amount is called the family maximum....

  18. NOTE FROM THE EDITOR: Bayesian and Maximum Entropy Methods Bayesian and Maximum Entropy Methods

    NASA Astrophysics Data System (ADS)

    Dobrzynski, L.

    2008-10-01

    The Bayesian and Maximum Entropy Methods are now standard routines in various data analyses, irrespective of ones own preference to the more conventional approach based on so-called frequentists understanding of the notion of the probability. It is not the purpose of the Editor to show all achievements of these methods in various branches of science, technology and medicine. In the case of condensed matter physics most of the oldest examples of Bayesian analysis can be found in the excellent tutorial textbooks by Sivia and Skilling [1], and Bretthorst [2], while the application of the Maximum Entropy Methods were described in `Maximum Entropy in Action' [3]. On the list of questions addressed one finds such problems as deconvolution and reconstruction of the complicated spectra, e.g. counting the number of lines hidden within the spectrum observed with always finite resolution, reconstruction of charge, spin and momentum density distribution from an incomplete sets of data, etc. On the theoretical side one might find problems like estimation of interatomic potentials [4], application of the MEM to quantum Monte Carlo data [5], Bayesian approach to inverse quantum statistics [6], very general to statistical mechanics [7] etc. Obviously, in spite of the power of the Bayesian and Maximum Entropy Methods, it is not possible for everything to be solved in a unique way by application of these particular methods of analysis, and one of the problems which is often raised is connected not only with a uniqueness of a reconstruction of a given distribution (map) but also with its accuracy (error maps). In this `Comments' section we present a few papers showing more recent advances and views, and highlighting some of the aforementioned problems. References [1] Sivia D S and Skilling J 2006 Data Analysis: A Bayesian Tutorial 2nd edn (Oxford: Oxford University Press) [2] Bretthorst G L 1988 Bayesian Spectruim Analysis and Parameter Estimation (Berlin: Springer) [3] Buck B and

  19. Which Achievement Gap?

    ERIC Educational Resources Information Center

    Anderson, Sharon; Medrich, Elliott; Fowler, Donna

    2007-01-01

    From the halls of Congress to the local elementary school, conversations on education reform have tossed around the term "achievement gap" as though people all know precisely what that means. As it's commonly used, "achievement gap" refers to the differences in scores on state or national achievement tests between various…

  20. 40 CFR 63.43 - Maximum achievable control technology (MACT) determinations for constructed and reconstructed...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (MACT) determinations for constructed and reconstructed major sources. 63.43 Section 63.43 Protection of... FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j) §...

  1. 40 CFR 63.43 - Maximum achievable control technology (MACT) determinations for constructed and reconstructed...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j) §...

  2. 40 CFR 63.43 - Maximum achievable control technology (MACT) determinations for constructed and reconstructed...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j) §...

  3. 40 CFR 63.43 - Maximum achievable control technology (MACT) determinations for constructed and reconstructed...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j) §...

  4. 40 CFR 63.43 - Maximum achievable control technology (MACT) determinations for constructed and reconstructed...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j) §...

  5. A 21st Century Navy Vision: Motivating Sailors to Achieve Maximum Warfighting Readiness

    DTIC Science & Technology

    2001-06-01

    George Steele, "Staying on Top," U.S. Naval Institute Proceedings (February 2000): 69. 275 Parcells, 180. 276 David Zvijac and John Hall...Naval Institute Proceedings (April 2000): 66-70. Zvijac , David and John Hall. Alternative Deployment Postures. Center for Naval Analyses Publication CRM

  6. A general formula for computing maximum proportion correct scores in various psychophysical paradigms with arbitrary probability distributions of stimulus observations.

    PubMed

    Dai, Huanping; Micheyl, Christophe

    2015-05-01

    Proportion correct (Pc) is a fundamental measure of task performance in psychophysics. The maximum Pc score that can be achieved by an optimal (maximum-likelihood) observer in a given task is of both theoretical and practical importance, because it sets an upper limit on human performance. Within the framework of signal detection theory, analytical solutions for computing the maximum Pc score have been established for several common experimental paradigms under the assumption of Gaussian additive internal noise. However, as the scope of applications of psychophysical signal detection theory expands, the need is growing for psychophysicists to compute maximum Pc scores for situations involving non-Gaussian (internal or stimulus-induced) noise. In this article, we provide a general formula for computing the maximum Pc in various psychophysical experimental paradigms for arbitrary probability distributions of sensory activity. Moreover, easy-to-use MATLAB code implementing the formula is provided. Practical applications of the formula are illustrated, and its accuracy is evaluated, for two paradigms and two types of probability distributions (uniform and Gaussian). The results demonstrate that Pc scores computed using the formula remain accurate even for continuous probability distributions, as long as the conversion from continuous probability density functions to discrete probability mass functions is supported by a sufficiently high sampling resolution. We hope that the exposition in this article, and the freely available MATLAB code, facilitates calculations of maximum performance for a wider range of experimental situations, as well as explorations of the impact of different assumptions concerning internal-noise distributions on maximum performance in psychophysical experiments.

  7. Collective Leadership Effects on Student Achievement

    ERIC Educational Resources Information Center

    Leithwood, Kenneth; Mascall, Blair

    2008-01-01

    Purpose: This study aimed to estimate the impact of collective, or shared, leadership on key teacher variables and on student achievement. As well, it inquired about the relative contribution of different sources of such leadership and whether differences among patterns of collective leadership were related to differences in student achievement.…

  8. The Constraints of Poverty on High Achievement

    ERIC Educational Resources Information Center

    Burney, Virginia H.; Beilke, Jayne R.

    2008-01-01

    Research studies on school success often focus on the impact of discrete elements such as race, culture, ethnicity, gender, language, or school location on high achievement. The condition of poverty, however, may be the most important of all student differences in relation to high achievement; although not all schools have racial diversity, nearly…

  9. Optimum Projection Angle for Attaining Maximum Distance in a Soccer Punt Kick

    PubMed Central

    Linthorne, Nicholas P.; Patel, Dipesh S.

    2011-01-01

    To produce the greatest horizontal distance in a punt kick the ball must be projected at an appropriate angle. Here, we investigated the optimum projection angle that maximises the distance attained in a punt kick by a soccer goalkeeper. Two male players performed many maximum-effort kicks using projection angles of between 10° and 90°. The kicks were recorded by a video camera at 100 Hz and a 2 D biomechanical analysis was conducted to obtain measures of the projection velocity, projection angle, projection height, ball spin rate, and foot velocity at impact. The player’s optimum projection angle was calculated by substituting mathematical equations for the relationships between the projection variables into the equations for the aerodynamic flight of a soccer ball. The calculated optimum projection angles were in agreement with the player’s preferred projection angles (40° and 44°). In projectile sports even a small dependence of projection velocity on projection angle is sufficient to produce a substantial shift in the optimum projection angle away from 45°. In the punt kicks studied here, the optimum projection angle was close to 45° because the projection velocity of the ball remained almost constant across all projection angles. This result is in contrast to throwing and jumping for maximum distance, where the projection velocity the athlete is able to achieve decreases substantially with increasing projection angle and so the optimum projection angle is well below 45°. Key points The optimum projection angle that maximizes the distance of a punt kick by a soccer goalkeeper is about 45°. The optimum projection angle is close to 45° because the projection velocity of the ball is almost the same at all projection angles. This result is in contrast to throwing and jumping for maximum distance, where the optimum projection angle is well below 45° because the projection velocity the athlete is able to achieve decreases substantially with increasing

  10. Multiple element airfoils optimized for maximum lift coefficient.

    NASA Technical Reports Server (NTRS)

    Ormsbee, A. I.; Chen, A. W.

    1972-01-01

    Optimum airfoils in the sense of maximum lift coefficient are obtained for incompressible fluid flow at large Reynolds number. The maximum lift coefficient is achieved by requiring that the turbulent skin friction be zero in the pressure rise region on the airfoil upper surface. Under this constraint, the pressure distribution is optimized. The optimum pressure distribution is a function of Reynolds number and the trailing edge velocity. Geometries of those airfoils which will generate these optimum pressure distributions are obtained using a direct-iterative method which is developed in this study. This method can be used to design airfoils consisting of any number of elements. Numerical examples of one- and two-element airfoils are given. The maximum lift coefficients obtained range from 2 to 2.5.

  11. The evolution of maximum body size of terrestrial mammals.

    PubMed

    Smith, Felisa A; Boyer, Alison G; Brown, James H; Costa, Daniel P; Dayan, Tamar; Ernest, S K Morgan; Evans, Alistair R; Fortelius, Mikael; Gittleman, John L; Hamilton, Marcus J; Harding, Larisa E; Lintulaakso, Kari; Lyons, S Kathleen; McCain, Christy; Okie, Jordan G; Saarinen, Juha J; Sibly, Richard M; Stephens, Patrick R; Theodor, Jessica; Uhen, Mark D

    2010-11-26

    The extinction of dinosaurs at the Cretaceous/Paleogene (K/Pg) boundary was the seminal event that opened the door for the subsequent diversification of terrestrial mammals. Our compilation of maximum body size at the ordinal level by sub-epoch shows a near-exponential increase after the K/Pg. On each continent, the maximum size of mammals leveled off after 40 million years ago and thereafter remained approximately constant. There was remarkable congruence in the rate, trajectory, and upper limit across continents, orders, and trophic guilds, despite differences in geological and climatic history, turnover of lineages, and ecological variation. Our analysis suggests that although the primary driver for the evolution of giant mammals was diversification to fill ecological niches, environmental temperature and land area may have ultimately constrained the maximum size achieved.

  12. Radiation engineering of optical antennas for maximum field enhancement.

    PubMed

    Seok, Tae Joon; Jamshidi, Arash; Kim, Myungki; Dhuey, Scott; Lakhani, Amit; Choo, Hyuck; Schuck, Peter James; Cabrini, Stefano; Schwartzberg, Adam M; Bokor, Jeffrey; Yablonovitch, Eli; Wu, Ming C

    2011-07-13

    Optical antennas have generated much interest in recent years due to their ability to focus optical energy beyond the diffraction limit, benefiting a broad range of applications such as sensitive photodetection, magnetic storage, and surface-enhanced Raman spectroscopy. To achieve the maximum field enhancement for an optical antenna, parameters such as the antenna dimensions, loading conditions, and coupling efficiency have been previously studied. Here, we present a framework, based on coupled-mode theory, to achieve maximum field enhancement in optical antennas through optimization of optical antennas' radiation characteristics. We demonstrate that the optimum condition is achieved when the radiation quality factor (Q(rad)) of optical antennas is matched to their absorption quality factor (Q(abs)). We achieve this condition experimentally by fabricating the optical antennas on a dielectric (SiO(2)) coated ground plane (metal substrate) and controlling the antenna radiation through optimizing the dielectric thickness. The dielectric thickness at which the matching condition occurs is approximately half of the quarter-wavelength thickness, typically used to achieve constructive interference, and leads to ∼20% higher field enhancement relative to a quarter-wavelength thick dielectric layer.

  13. Do Charter Schools Improve Student Achievement?

    ERIC Educational Resources Information Center

    Clark, Melissa A.; Gleason, Philip M.; Tuttle, Christina Clark; Silverberg, Marsha K.

    2015-01-01

    This article presents findings from a lottery-based study of the impacts of a broad set of 33 charter middle schools across 13 states on student achievement. To estimate charter school impacts, we compare test score outcomes of students admitted to these schools through the randomized admissions lotteries with outcomes of applicants who were not…

  14. Interplanetary monitoring platform engineering history and achievements

    NASA Technical Reports Server (NTRS)

    Butler, P. M.

    1980-01-01

    In the fall of 1979, last of ten Interplanetary Monitoring Platform Satellite (IMP) missions ended a ten year series of flights dedicated to obtaining new knowledge of the radiation effects in outer space and of solar phenomena during a period of maximum solar flare activity. The technological achievements and scientific accomplishments from the IMP program are described.

  15. Maximum entanglement in squeezed boson and fermion states

    SciTech Connect

    Khanna, F. C.; Malbouisson, J. M. C.; Santana, A. E.; Santos, E. S.

    2007-08-15

    A class of squeezed boson and fermion states is studied with particular emphasis on the nature of entanglement. We first investigate the case of bosons, considering two-mode squeezed states. Then we construct the fermion version to show that such states are maximum entangled, for both bosons and fermions. To achieve these results, we demonstrate some relations involving squeezed boson states. The generalization to the case of fermions is made by using Grassmann variables.

  16. From Maximum Entropy Models to Non-Stationarity and Irreversibility

    NASA Astrophysics Data System (ADS)

    Cofre, Rodrigo; Cessac, Bruno; Maldonado, Cesar

    The maximum entropy distribution can be obtained from a variational principle. This is important as a matter of principle and for the purpose of finding approximate solutions. One can exploit this fact to obtain relevant information about the underlying stochastic process. We report here in recent progress in three aspects to this approach.1- Biological systems are expected to show some degree of irreversibility in time. Based on the transfer matrix technique to find the spatio-temporal maximum entropy distribution, we build a framework to quantify the degree of irreversibility of any maximum entropy distribution.2- The maximum entropy solution is characterized by a functional called Gibbs free energy (solution of the variational principle). The Legendre transformation of this functional is the rate function, which controls the speed of convergence of empirical averages to their ergodic mean. We show how the correct description of this functional is determinant for a more rigorous characterization of first and higher order phase transitions.3- We assess the impact of a weak time-dependent external stimulus on the collective statistics of spiking neuronal networks. We show how to evaluate this impact on any higher order spatio-temporal correlation. RC supported by ERC advanced Grant ``Bridges'', BC: KEOPS ANR-CONICYT, Renvision and CM: CONICYT-FONDECYT No. 3140572.

  17. 'No delays achiever'.

    PubMed

    2007-05-01

    The latest version of the NHS Institute for Innovation and Improvement's 'no delays achiever', a web based tool created to help NHS organisations achieve the 18-week target for GP referrals to first treatment, is available at www.nodelaysachiever.nhs.uk.

  18. Vicarious Achievement Orientation.

    ERIC Educational Resources Information Center

    Leavitt, Harold J.; And Others

    This study tests hypotheses about achievement orientation, particularly vicarious achievement. Undergraduate students (N=437) completed multiple-choice questionnaires, indicating likely responses of one person to the success of another. The sex of succeeder and observer, closeness of relationship, and setting (medical school or graduate school of…

  19. Heritability of Creative Achievement

    ERIC Educational Resources Information Center

    Piffer, Davide; Hur, Yoon-Mi

    2014-01-01

    Although creative achievement is a subject of much attention to lay people, the origin of individual differences in creative accomplishments remain poorly understood. This study examined genetic and environmental influences on creative achievement in an adult sample of 338 twins (mean age = 26.3 years; SD = 6.6 years). Twins completed the Creative…

  20. Confronting the Achievement Gap

    ERIC Educational Resources Information Center

    Gardner, David

    2007-01-01

    This article talks about the large achievement gap between children of color and their white peers. The reasons for the achievement gap are varied. First, many urban minorities come from a background of poverty. One of the detrimental effects of growing up in poverty is receiving inadequate nourishment at a time when bodies and brains are rapidly…