Assessing and Improving Positional Accuracy and its Effects on Areal Estimation at Coleambally Irrigation Area

If management decisions are made with geospatial data that have not been assessed for positional accuracy, then debate about both methodologies of measurement and management decisions can occur. This debate, in part, can be avoided by assessing the positional accuracy of geospatial data, leading to increased confidence (decreased uncertainty) in both the data and the decisions made from the data. In this study, we assessed the positional accuracy of two Geographic Information System (GIS) baseline datasets at the Coleambally Irrigation Area (CIA); high-resolution digital aerial photography acquired in January 2000, and the Digital Topographic Data Base (DTDB) roads data. We also assessed areal error of paddock measurements from an improved accuracy version of the high-resolution digital aerial photography. Positional accuracies were assessed by comparing well-defined features from both baseline datasets (original aerial photography and DTDB roads) to high-level accuracy Differential Global Positioning System (DGPS) data for the same features. This assessment showed that neither baseline dataset met the National Mapping Council of Australia’s standards of map accuracy. Consequently, we processed the original digital photography to create an improved dataset, which was over 2.5 times more accurate than the original photography, and over 4 times more accurate than the DTDB data. The improved dataset also met the map accuracy standard for Australia. We also assessed areal error by comparing paddock boundaries delineated from the improved dataset to those delineated from a DGPS associated with paddock soil surveys. The 90% confidence interval measured from the improved data for any individual paddock is approximately at the ± 5% target error set by Coleambally Irrigation Limited (CIL). The 95% confidence interval is roughly ± 6%. Overall areal error of multiple paddocks is much lower than the individual case with the 95% confidence interval for 2 paddocks being from about ± 4% error reducing to less than ± 2% for 8 or more paddocks. Knowledge of both positional and areal accuracies of the improved high-resolution digital aerial photography provides a means to more effectively manage environmental compliance of rice farmers at CIA and gives the CIL justification for making management decisions from this spatial data

Site-Dilution in quasi one-dimensional antiferromagnet Sr2(Cu1-xPdx)O3: reduction of Neel Temperature and spatial distribution of ordered moment sizes

We investigate the Neel temperature of Sr2CuO3 as a function of the site dilution at the Cu (S=1/2) sites with Pd (S=0), utilizing the muon spin relaxation (muSR) technique. The Neel temperature, which is Tn=5.4K for the undoped system, becomes significantly reduced for less than one percent of doping Pd, giving a support for the previous proposal for the good one-dimensionality. The Pd concentration dependence of the Neel temperature is compared with a recent theoretical study (S. Eggert, I. Affleck and M.D.P. Horton, Phys. Rev. Lett. 89, 47202 (2002)) of weakly coupled one-dimensional antiferromagnetic chains of S=1/2 spins, and a quantitative agreement is found. The inhomogeneity of the ordered moment sizes is characterized by the muSR time spectra. We propose a model that the ordered moment size recovers away from the dopant S=0 sites with a recovery length of \xi = 150-200 sites. The origin of the finite recovery length \xi for the gapless S=1/2 antiferromagnetic chain is compared to the estimate based on the effective staggered magnetic field from the neighboring chains.Comment: 10 pages, 9 figures, submitted to PR

Progression and individual differences in children's series completion after dynamic testing

Background The need to focus more on children's abilities to change requires new assessment technologies in education. Process-oriented assessment can be useful in this regard. Dynamic testing has the potential to provide in-depth information about children's learning processes and cognitive abilities.Aim This study implemented a process-oriented dynamic testing procedure to obtain information regarding children's changes in series-completion skills in a computerised test setting. We studied whether children who received a graduated prompts training would show more progression in series-completion than children who received no training, and whether trained children would use more advanced explanations of their solutions than their untrained peers.Sample Participants were 164 second-grade children with a mean age of 7;11 years. Children were split into an unguided practice or a dynamic testing condition.Methods The study employed a pre-test-training-post-test design. Half of the children were trained in series-completion, and the other half did not receive any feedback on their problem solving. Using item response theory analysis, we inspected the progression paths of the children in the two conditions.Results and conclusions Children who received training showed more progression in their series-completion skills than the children who received no training. In addition, the trained children explained their solutions in a more advanced manner, when compared with the non-trained control group. This information is valuable for educational practice as it provides a better understanding of how learning occurs and which factors contribute to cognitive changes.Pathways through Adolescenc

Haal meer stikstof uit de bodem! : tips voor een optimaal stikstofgebruik op een aardbeibedrijf!

In dit document staan de stappen uitgelegd om te komen tot een bemestingsplan voor een gespecialiseerd aardbeibedrijf dat voldoet aan de wetgeving. In de rest van de tekst lichten de auteurs de stappen toe voor de stikstofbemestin

Effectiveness of adenoidectomy in children with recurrent upper respiratory tract infections: open randomised controlled trial

Objective To assess the effectiveness of adenoidectomy in children with recurrent upper respiratory tract infections

Dimensional Implicit Memory Priming Deficits in Young ADHD Adults

The experiment explored the difference between production and identification processes and conceptual and perceptual processes in long-term implicit memory. The first phase consisted of prescreening ADHD (Attention Deficit Hyperactivity Disorder) and non- ADHD Texas A&M undergraduate students. The second phase consisted of a study task and a filler task. The third phase consisted of four tests containing two of the four processes. The participants performed a category verification test (conceptualidentification cross), category generation test (conceptual-production cross), a flashing words test (perceptual-identification cross), and a stem completion test (perceptualproduction cross). No statistically significant difference in priming was found between ADHD and non-ADHD. However, looking at the sample as a whole (ADHD and non- ADHD combine), there was significant priming in the category generation test, flashing words test, and the stem completion test but not in the category verification test

Milieueffecten van maatregelen gewasbescherming

In de in dit werkdocument beschreven modelstudie zijn berekeningen uitgevoerd over 15 teelten in de sectoren akkerbouw, vollegrondsgroenten, bloembollen fruitteelt en boomkwekerij. De milieueffectiviteit van de maatregelen is getoetst aan de hand van de reductie in Milieu Indicator Punten (MIP) voor de milieubelasting van oppervlaktewater door drift bij gewasbescherming (conform de toetsingsparameter in de Tussenevaluatie). Tevens is het effect op andere milieucompartimenten onderzocht. Voor de MIP-berekeningen is het Milieutechnisch en Economisch Bedrijfsmodel voor de Open Teelten (MEBOT) aangepast

Aanvullend advies op actualisatie maatregelen duurzame gewasbescherming 2009 : een selectie aan maatregelen waarmee op korte termijn het meest bereikt kan worden in de praktijk

PPO Wageningen UR, heeft in opdracht van het Ministerie van LNV in het kader van het convenant gewasbescherming maatregelen gecatalogiseerd die bijdragen aan het verlagen van de milieubelasting en aan het stimuleren van geïntegreerde gewasbescherming. Dit traject startte in 2004 en actualisatie vond plaats in 2006, 2007 en 2009. Na drie jaar actualisatie is een ontwikkeling in maatregelen zichtbaar. Deze publicatie bevat adviezen over maatregelen waarmee het meest bereikt wordt in de maatschappij