104 research outputs found

    Simulations of Baryon Oscillations

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    The coupling of photons and baryons by Thomson scattering in the early universe imprints features in both the Cosmic Microwave Background (CMB) and matter power spectra. The former have been used to constrain a host of cosmological parameters, the latter have the potential to strongly constrain the expansion history of the universe and dark energy. Key to this program is the means to localize the primordial features in observations of galaxy spectra which necessarily involve galaxy bias, non-linear evolution and redshift space distortions. We present calculations, based on mock catalogs produced from high-resolution N-body simulations, which show the range of behaviors we might expect of galaxies in the real universe. We investigate physically motivated fitting forms which include the effects of non-linearity, galaxy bias and redshift space distortions and discuss methods for analysis of upcoming data. In agreement with earlier work, we find that a survey of several Gpc^3 would constrain the sound horizon at z~1 to about 1%.Comment: 33 pages, to appear in Astroparticle Physics. Discussion of Blake & Glazebrook procedure changed, minor edits to match version accepted by the journa

    Ordovician K-bentonites in the Argentine Precordillera: relations to Gondwana margin evolution

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    Ordovician K-bcn Ionites have now been recorded from >20 localities in the vicinity of the Argentine Prccordillera. Most occur in I he eastern thrust belts, in the San Juan Limestone and the overlying the Gualcamayo Formation, but a few ash beds are known also from the central thrust belts. The oldest occur in the middle Arenig t. victorias iunatus grnplolite (Oe. evae conodont) Zone, and the youngest in the middle Llanvirn P. etegans (P. .tuecicas) Zone. Mineralogical characteristics, typical of other Ordovician K-bentonites, include a matrix of illite/smectite mixed-layer clay and a typical felsic volcanic phenocryst assemblage: biotite, beta-form quartz, alkali and plagioclase feldspar, apatite, and zircon, with lesser amounts of hornblende, clinopyroxene, tilanilc and Fe-Ti oxides. The proportions of the mineral phases and variations iii their crystal chemistry are commonly unique to individual (or small groups of) K-benlonite beds. Glass melt inclusions preserved in quartz are rhyolitic in composition The sequence is unique in its abundance of K-benlonite beds, but a close association between the Precordillera and other Ordovician sedimentary basins cannot be established.Theash distribution is most consistent with palacogeographical reconstructions in which early Ordovician drifting of the Precordillera occurred in proximity to one or more volcanic arcs, and with eventual collision along the Andean margin of Gondwana during the mid-Ordovician Ocloyic event of the Famalinian orogeny. The Puna-Famatina terrane northeast of the Precordillera might have served as the source of the K-bcnlonite ashes, possibly in concert with active arc magmatism on the Gondwana plate itself.Centro de Investigaciones Geológica

    Maine Blueberry Advisory Committee Research Report

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    The 1990 edition of the Maine Blueberry Advisory Committee Research Reports was prepared for the Maine Wild Blueberry Commission and the University of Maine Wild Blueberry Advisory Committee by researchers with the Maine Agricultural Experiment Station and Maine Cooperative Extension Service at the University of Maine, Orono. Projects in this report include: 1. Biology and action thresholds of secondary blueberry pests 2. Control of blueberry maggot 3. Control of secondary blueberry pests 4. Application of steam as a method of controlling secondary pest insects on lowbush blueberry: a feasibility study 5. Pollination of the lowbush blueberry by native bees 6. Nitrogen-phosphorus study 7. Potassium study 8. Multiple cropping of wild stands 9. Phosphorus dose/response curve 10. Improvement in the color and texture of the canned blueberry 11. The effect of fertilization and irrigation on blueberry fruit quality 12. Investigation of preprocess changes (chemical, microbiological, and/or physical) that could lead to the development of a simple and inexpensive method to measure preprocess berry spoilage 13. The effect of postharvest handling on the dietary fiber and ellagic acid content of lowbush blueberries 14. Determination of pesticide residue levels in freshly harvested and processed lowbush blueberries 15. Evaluation of Defoliating Diseases 16. Vacuum Sanitation for Disease Control 17. Evaluation and modification of commercial herbicide applications 18. Evaluation of the suitability of remote sensing to evaluate plant cover in lowbush blueberry fields 19. Evaluation of Sethoxydin (POAST) in lowbush blueberry fields 20. Seedling pruning study 21. Evaluation of norflurazon (SOLICAM) with or without hexazinone (VELPAR) for bunchberry control 22. Selective wiper and mechanical control of dogbane and bracken fern 23. Evaluation of norflurazon (SOLICAM) in fall vs spring for oatgrass control 24. Evaluation of sulfonyl urea herbicides for bunchberry control 25. Evaluation of postemergence applications of DPX-L5300 for bunchberry control 26. Effect of time of application and formulation of hexazinone (VELPAR) on blueberry and bunchberry 27. Investigations of lowbush blueberry fruit-bud cold hardiness 28. The economics of investing in irrigation for lowbush blueberries 29. Effects of irrigation on lowbush blueberry yield and quality 30. Groundwater and surface water development for blueberry irrigation 31. Design, fabrication and testing of an experimental sterilizer for blueberry field

    1992 Blueberry Research Progress Reports

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    The 1992 Blueberry Research Progress Reports pertain to and report on research conducted in 1991, and were prepared for the Maine Wild Blueberry Commission and the University of Maine Wild Blueberry Advisory Committee by researchers at the University of Maine, Orono. Projects in this report include: 1992 CSRS Progress Reports: 1. Investigation of Groundwater Resources 2. Sprinkler Irrigation 3. Investigation of Preprocess Changes Leading to Berry Spoilage 4. Effect of Fertilization and Irrigation on Blueberry Quality 5. Effects of Calcium Salts and Citric Acid on Quality of Canned Lowbush Blueberries 6. Pollination of Lowbush Blueberry by Native Bees 7. Application of Heat for Controlling Insects 8. Investigations of Lowbush Blueberry Fruit Bud Cold-Hardiness 9. Steam Sterilization in Lowbush Blueberry Fields 10. Heat-Tolerant Molds 11. Vacuum Sanitation for Disease Control 12. Evaluation of Infrared Burner for Weed Control 13. Evaluation and Modification of Commercial Herbicide Wipers 14. Evaluation of Remote Sensing to Estimate Plant Cover in Lowbush Blueberry Fields 15. Comparison of Three Mechanical Blueberry Harvesters vs. Hand Raking Advisory Committee Research Reports: 16. Biology and action thresholds of secondary blueberry insects 17. Control of secondary blueberry pests 18. Control of blueberry maggot 19. Effects of calcium salts and citric acid on the quality of canned lowbush blueberries 20. The effects of postharvest handling on the dietary fiber and ellagic acid content of lowbush blueberries 21. Investigation of preprocessing changes that could lead to development of simple and inexpensive method to measure preprocessing berry spoilage 22. Determination of pesticide residue levels in fresh and processed lowbush blueberries 23. Vacuum sanitation for disease control 24. Heat-tolerant molds 25. Seedling pruning study 26. Effect of time and rate of application of Clopyralid for control of Vetch in lowbush blueberries 27. Evaluation and modification of commercial herbicide wipers 28. Effect of time of application and formulation of Hexazinone (Velpar) on Blueberry and Bunchberry 29. Evaluation of postemergence applications of Tribenuron Methyl for Bunchberry control 30. Thresholds of Dogbane and Bracken Fern by mechanical and chemical control in lowbush blueberry fields 31. Evaluation of the suitability of remote sensing to evaluate plant cover in lowbush blueberry fields 32. Evalution of infrared burner for weed control 33. Effect of time of fall pruning on growth and productivity of blueberry and evaluation of infrared burner to prune blueberries 34. Effect of Boron on lowbush blueberry fruit set and yield 35. Winter injury protection by potassium 36. Multiple cropping of wild stands 37. Nitrogen-Phosphorus study 38. Phosphorus dose/response curve 39. Investigations of lowbush blueberry fruit bud cold-hardines

    1993 Progress Reports

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    The 1993 Progress Reports which contain Blueberry Tax Supported Weed Management and Pruning Project Reports, and CSRS Supported Weed Management and Pruning Project Reports, pertain to and report on research conducted in 1992. They were prepared for the Maine Wild Blueberry Commission and the University of Maine Wild Blueberry Advisory Committee by researchers at the University of Maine, Orono. Projects in this report include: Progress Reports 1. Effects of Irrigation on Low bush Blueberry Yield and Quality 2. Economics of Investing in Irrigation for Lowbush Blueberries 3. Diammonium Phosphate Study 4. Phosphorus Dose/Response Curve 5. Winter Injury Protection by Potassium 6. Multiple Cropping of Wild Stands 7. Effect of Boron on Lowbush Blueberry Fruit Set and Yield 8.Determination of Pesticide Residue Levels in Freshly Harvested and Processed Lowbush Blueberries 9. Effects of Calcium Salts and Citric Acids on the Quality of Canned Lowbush Blueberries- missing 10. Investigation of PreProcess Changes- missing 11. The Effect of Fertilization and Irrigation on Blueberry Fruit Control - missing 12. Pollination Ecology of Lowbush Blueberry in Maine 13. Control of Secondary Blueberry Pests 14. Control of Blueberry Maggot 15. Biology and Action Thresholds of Secondary Blueberry Pests 16. Cold-Hardiness of Native Lowbush Blueberries 17. Design, Fabrication, and Testing of an Experimental Sterilizer for Blueberry Fields 18. Canned Product Quality - Heat Resistant Molds 19. Sanitation for Disease Control Blueberry Tax Supported Weed Management and Pruning Project Reports 20. Evaluation of Postemergence Applications of Tribenuron Methyl for Bunchberry Control 21. Comparison of Poast and Select for Suppression of Bunchgrass 22. Effect of Time of Fall Pruning on Growth and Productivity of Blueberries. and Evaluation of Infrared Burner to Prune Blueberries 23. Evaluation of Velpar impregnated DAP for weed control 24. Thresholds of Dogbane and Bracken Fern for Mechanical and Chemical Control in Lowbush Blueberry Fields 25. Effect of Time and Rate of Application of Clopyralid for Control of Vetch in Lowbush Blueberries 26. Hexazinone Ground Water Survey 27. Composting Blueberry Processing Waste 28. Hexazinone Movement in a Blueberry Soil in Maine CSRS Supported Weed Management and Pruning Project Reports 29. Evaluation of the Suitability of Remote Sensing to Evaluate Plant Cover in Lowbush Blueberry Fields 30. Obstruction Removal in Lowbush Blueberry Fields 31. Evaluation of Pressurized Rope Wick Wick Master Wiper for Treating Weeds Growing Above Lowbush Blueberries 32. Evaluation of Infrared Burner for Weed Control 33. Blueberry Extension Education Program Base Miscellaneous 34. Comparison of N, NP, and NPK Fertilizers to Correct Nitrogen and Phosphorus Deficienc

    1993-94 Progress Report

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    The 1993 edition of the Progress Reports was prepared for the Maine Wild Blueberry Commission and the University of Maine Wild Blueberry Advisory Committee by researchers at the University of Maine, Orono. Projects in this report include: 1. Effects of irrigation on lowbush blueberry yield and quality 2. The Economics of investigating irrigation for lowbush blueberries 3. Phosphorus dose/response curve 4. Winter injury protection by potassium 5. Multiple cropping of wild stands 6. Effect of Boron and Calcium on lowbush blueberry fruit set and yield 7. Comparison of N, NP, and NPK fertilizers to correct nitrogen and phosphorus deficiency 8. Determination of pesticide residue levels in freshly harvested and processed lowbush blueberries 9. Effects of calcium salts and citric acid on the quality of canned lowbush blueberries 10. Investigation of preprocess changes (chemical, microbiological, and/or physical) that can lead to the development of a simple and inexpensive method to measure preprocess berry spoilage 11. The effect of fertilization and irrigation in blueberry fruit quality 12. Pollination Ecology of lowbush blueberry in Maine 13. Current importance of insects in lowbush blueberry fields 14. Application of heat as a method of controlling secondary pest insects on lowbush blueberry: a feasibility study 15. Control of blueberry maggot 16. Control of secondary blueberry pest insects 17. Biology and action thresholds of secondary blueberry pest insects 18. Cold-hardiness of native lowbush blueberry 19. Design, fabrication, and testing of an experimental sterilizer for blueberry fields 20. Canned Product Quality--Heat-resistant molds 21. Sanitation for disease control 22. Evaluation of Velpar® impregnated DAP and Pronone® for weed control 23. Evaluation of postemergence applications of tribenuron methyl for bunchberry control 24. Evaluation of postemergence applications of a tank mix of tribenuron methyl and hexazinone for bunchberry control 25. Thresholds of dogbane and bracken fem by mechanical and chemical control in lowbush blueberry fields 26. Effect of time of application of clopyralid for control of vetch and effect on flowering in lowbush blueberries 27. Effect of time of fall pruning on growth and productivity of blueberries and evaluation of infrared burner to prune blueberries 28. Evaluation of infrared burner for selective seedling weed control 29. Evaluation of pressurized rope wick Wick Master wiper for treating weeds growing above lowbush blueberries 30. Blueberry Extension Education Program Base 31. Blueberry ICM program for Hancock County 32. Composting blueberry processing waste 33. Hexazinone ground water survey 34. Investigations of Lowbush Blueberry Fruit bud Cold-hardiness 35. Design, Fabrication, and Testing of an Experimental Sterilizer for Blueberry Field

    The specific surface area and chemical composition of diamond dust near Barrow, Alaska

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95687/1/jgrd17349.pd

    Geoeconomic variations in epidemiology, ventilation management, and outcomes in invasively ventilated intensive care unit patients without acute respiratory distress syndrome: a pooled analysis of four observational studies

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    Background: Geoeconomic variations in epidemiology, the practice of ventilation, and outcome in invasively ventilated intensive care unit (ICU) patients without acute respiratory distress syndrome (ARDS) remain unexplored. In this analysis we aim to address these gaps using individual patient data of four large observational studies. Methods: In this pooled analysis we harmonised individual patient data from the ERICC, LUNG SAFE, PRoVENT, and PRoVENT-iMiC prospective observational studies, which were conducted from June, 2011, to December, 2018, in 534 ICUs in 54 countries. We used the 2016 World Bank classification to define two geoeconomic regions: middle-income countries (MICs) and high-income countries (HICs). ARDS was defined according to the Berlin criteria. Descriptive statistics were used to compare patients in MICs versus HICs. The primary outcome was the use of low tidal volume ventilation (LTVV) for the first 3 days of mechanical ventilation. Secondary outcomes were key ventilation parameters (tidal volume size, positive end-expiratory pressure, fraction of inspired oxygen, peak pressure, plateau pressure, driving pressure, and respiratory rate), patient characteristics, the risk for and actual development of acute respiratory distress syndrome after the first day of ventilation, duration of ventilation, ICU length of stay, and ICU mortality. Findings: Of the 7608 patients included in the original studies, this analysis included 3852 patients without ARDS, of whom 2345 were from MICs and 1507 were from HICs. Patients in MICs were younger, shorter and with a slightly lower body-mass index, more often had diabetes and active cancer, but less often chronic obstructive pulmonary disease and heart failure than patients from HICs. Sequential organ failure assessment scores were similar in MICs and HICs. Use of LTVV in MICs and HICs was comparable (42\ub74% vs 44\ub72%; absolute difference \u20131\ub769 [\u20139\ub758 to 6\ub711] p=0\ub767; data available in 3174 [82%] of 3852 patients). The median applied positive end expiratory pressure was lower in MICs than in HICs (5 [IQR 5\u20138] vs 6 [5\u20138] cm H2O; p=0\ub70011). ICU mortality was higher in MICs than in HICs (30\ub75% vs 19\ub79%; p=0\ub70004; adjusted effect 16\ub741% [95% CI 9\ub752\u201323\ub752]; p<0\ub70001) and was inversely associated with gross domestic product (adjusted odds ratio for a US$10 000 increase per capita 0\ub780 [95% CI 0\ub775\u20130\ub786]; p<0\ub70001). Interpretation: Despite similar disease severity and ventilation management, ICU mortality in patients without ARDS is higher in MICs than in HICs, with a strong association with country-level economic status. Funding: No funding
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