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700
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701
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702
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703
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704
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705
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706
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707
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708
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709
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710
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711
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712
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713
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714
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715
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716
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717
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718
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719
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720
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721
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722
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723
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724
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725
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726
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734
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738
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739
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740
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752
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758
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759
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760
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[ "We", "report", "recent", "advancements", "of", "the", "agglomerated", "multigrid", "methodology", "for", "complex", "flow", "simulations", "on", "fully", "unstructured", "grids", ".", "An", "agglomerated", "multigrid", "solver", "is", "applied", "to", "a", "wide", "range", "of", "test", "problems", "from", "simple", "two", "-", "dimensional", "geometries", "to", "realistic", "three-", "dimensional", "configurations", ".", "The", "solver", "is", "evaluated", "against", "a", "single", "-", "grid", "solver", "and", ",", "in", "some", "cases", ",", "against", "a", "structured", "-", "grid", "multigrid", "solver", ".", "Grid", "and", "solver", "issues", "are", "identified", "and", "overcome", ",", "leading", "to", "significant", "improvements", "over", "single", "-", "grid", "solvers", "." ]
761
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[ "Upon", "completion", "of", "the", "first", "Space", "Launch", "System", "flight", ",", "NASA", "personnel", "will", "begin", "post", "-", "flight", "analyses", ".", "Telemetry", "from", "across", "the", "vehicle", "will", "be", "combined", "with", "external", "radar", "tracking", "and", "environmental", "observation", "data", "in", "order", "to", "close", "validation", "criteria", "and", "generate", "a", "best", "estimated", "trajectory", "(", "BET", ")", ".", " ", "This", "paper", "will", "describe", "the", "approach", "taken", "by", "the", "SLS", "team", "to", "integrate", "flight", "data", "from", "multiple", "flights", "sources", "into", "BET", ",", "pre", "-", "flight", "simulation", "and", "testing", "results", ",", "primary", "sources", "of", "uncertainty", ",", "and", "path", "towards", "processing", "flight", "results", ".", "This", "paper", "also", "includes", "a", "brief", "description", "of", "algorithms", "and", "approaches", "to", "estimate", "as", "-", "flown", "vehicle", "parameters", "such", "as", "booster", "specific", "impulse", ",", "booster", "(", "and", "core", ")", "thrust", "multipliers", "and", "dry", "mass", "." ]
762
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[ "Niobium", "antimony", "telluride", ",", "Nb3Sbx", ",", "Te7", "-", "x", ",", "was", "synthesized", "and", "tested", "for", "thermoelectric", "properties", "in", "the", "Thermoelectrics", "group", "at", "the", "Jet", "Propulsion", "Laboratory", ".", "The", "forty", "atoms", "per", " ", "unit", "cell", "of", "Nb3Sb2Te5", "and", "its", "varied", "mixture", "of", "atoms", "yield", "acomplicated", "structure", ",", "suggesting", "that", "Nb3Sb2Te5", "and", "related", "compounds", "may", "exhibit", "low", "thermal", "conductivity", "and", "hence", "a", " ", "higher", "ZT", "value", ".", "Nb3SbxTe7", "-", "x", ",", "compounds", "were", "synthesized", "and", "subsequently", "analyzed", "for", "their", "Seebeck", "voltage", ",", "heat", "conduction", ",", "and", "electrical", "resistivity", ".", "Results", "indicate", "that", " ", "Nb3Sb2Te5", "is", "a", "heavily", "doped", "semiconductor", "whose", "thermoelectric", "properties", "are", "compromised", "by", "compensating", "n", "-", "type", "and", "p", "-", "type", "carriers", ".", "Attempts", "to", "dope", "in", "favor", "of", "either", "carrier", "by", " ", "varying", "the", "Sb", ":", "Te", "ratio", "yielded", "samples", "containing", "secondary", "metallic", "phases", "that", "dominated", "the", "transport", "properties", "of", "the", "resulting", "compounds", "." ]
763
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[ "The", "50,000", "year", "old", ",", "1.8", "km", "diameter", "Lonar", "crater", "is", "located", "in", "Maharashtra", ",", "India", ".", "This", "relatively", "small", "crater", "is", "of", "particular", "interest", "because", "of", "its", "unique", "morphological", "and", "mineralogical", "properties", ",", "which", "make", "it", "a", "valid", "analogue", "for", "similar", "craters", "on", "the", "surface", "of", "Mars", ".", "We", "show", "that", "even", "in", "this", "relatively", "small", "crater", ",", "substantial", "hydrothermal", "alteration", "of", "shocked", "breccias", "in", "the", "floor", "of", "the", "crater", "has", "occurred", ",", "probably", "due", "to", "the", "thermal", "effects", "of", "the", "impact", "event", ".", "The", "38", "my", "old", ",", "28", "km", "diameter", ",", "Mistastin", "crater", "contains", "an", "80", "m", "thick", "impact", "melt", "sheet", ".", "We", "have", "also", "documented", "the", "presence", "of", "alteration", "phases", "in", "the", "material", "from", "this", "larger", "crater", "." ]
764
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[ "The", "Space", "Shuttle", "Main", "Engine", "(", "SSME", ")", "electrical", "harness", "and", "cable", "system", "consists", "of", "the", "various", "interconnecting", "devices", "necessary", "for", "operation", "of", "complex", "rocket", "engine", "functions", ".", "Thirty", "seven", "harnesses", "incorporate", "unique", "connectors", ",", "backshell", "adapters", ",", "conductors", ",", "insulation", ",", "shielding", ",", "and", "physical", "barriers", "for", "a", "long", "maintenance", "-", "free", "life", "while", "providing", "the", "means", "to", "satisfy", "performance", "requirements", "and", "to", "mitigate", "adverse", "environmental", "influences", ".", "The", "objective", "of", "this", "paper", "is", "to", "provide", "a", "description", "of", "the", "SSME", "electrical", "harness", "and", "cable", "designs", "as", "well", "as", "the", "development", "history", "and", "lessons", "learned", "." ]
765
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[ "High", "-", "power", "plasma", "thrusters", "that", "utilize", "molten", "metallic", "propellants", "(", "e.g.", ",", "the", "Lithium", "Lorentz", "Force", "Accelerator", ")", "are", "currently", "being", "investigated", "as", "a", "primary", "propulsion", "option", "for", "in", "-", "space", "nuclear", "-", "electric", "systems", ".", "A", "critical", "component", "of", "the", "thruster", "is", "the", "propellant", "feed", "system", ",", "which", "must", "reliably", "and", "accurately", "pump", "liquid", "metal", "into", "the", "thruster", "discharge", "chamber", ".", "We", "present", "design", "details", "and", "calibration", "results", "for", "a", "compact", "liquid", "metal", "propellant", "feed", "system", "that", "contains", "no", "moving", "parts", ",", "for", "use", "in", "laboratory", "testing", "of", "plasma", "thrusters", ".", "Feed", "line", "pressure", "is", "maintained", "using", "an", "MHD", "flow", "coupler", ",", "and", "the", "flow", "rate", "is", "monitored", "using", "a", "simple", "voltage", "divider", ",", "which", "is", "submerged", "in", "the", "propellant", "reservoir", ".", "Results", "for", "lithium", "and", "gallium", "propellants", "show", "capability", "to", "meter", "propellant", "at", "flow", "rates", "up", "to", "10", "+", "/-", "0.1", "mg", "/", "s." ]
766
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[ "The", "destruction", "rates", "of", "a", "perfluoropolyether", "(", "PFPE", ")", "lubricant", ",", "Krytox", "143AC(TradeMark", ")", ",", "subjected", "to", "rolling", "contact", "with", "440C", "steel", "in", "a", "spiral", "orbit", "tribometer", "at", "room", "temperature", "have", "been", "evaluated", "as", "a", "function", "of", "test", "environment", ".", "The", "rates", "in", "ultrahigh", "vacuum", ",", "0.21", "3", "kPa", "(", "1.6", "Torr", ")", "oxygen", "and", "one", "atmosphere", "of", "dry", "nitrogen", "were", "about", "the", "same", ".", "Water", "vapor", "in", "the", "test", "environment", "-", "a", "few", "ppm", "in", "one", "atmosphere", "of", "nitrogen", "-", "reduced", "the", "destruction", "rate", "by", "up", "to", "an", "order", "of", "magnitude", ".", "A", "similar", "effect", "of", "water", "vapor", "was", "found", "for", "the", "destruction", "rate", "of", "Pennzane(Registered", "TradeMark", ")", "2001A", ",", "an", "unformulated", "multiply", "alkylated", "cyclopentane", "(", "MAC", ")", "hydrocarbon", "oil", "." ]
767
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[ "To", "date", "the", "LEO", "battery", "has", "completed", "5000", "nominal", "cycles", ".", "The", "EODV", "is", "trending", "down", "by", "50mV", "per", "1000", "cycles", ".", "To", "date", "the", "GEO", "battery", "has", "completed", "2", "nominal", "shadow", "periods", "and", "currently", "in", "sunlight", "period", ".", "Batteries", "testing", "after", "one", "year", "looks", "encouraging", "for", "aerospace", "application", ".", "There", "are", "no", "discrepancies", "between", "the", "current", "data", "and", "extensive", "testing", "conducted", "at", "Saft", "over", "the", "past", "5", "years", "." ]
768
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[ "This", "paper", "presents", "a", "status", "report", "on", "the", "progress", "of", "the", "Meteorological", "Satellite", "Program", ".", "In", "this", "review", ",", "I", "shall", "try", "to", "emphasize", "primarily", "the", "accomplishments", "since", "May", "1961", "when", "a", "report", "on", "the", "program", "was", "given", "to", "the", "First", "National", "Conference", "on", "Peaceful", "Uses", "of", "Space", "in", "Tulsa", ",", "Oklahoma", ".", "It", "is", "now", "one", "year", "later", ",", "and", "it", "is", "fitting", "that", "we", "stop", "and", "take", "stock", "of", "what", "we", "have", "been", "doing", "and", "where", "we", "are", "heading", "." ]
769
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770
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785
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787
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788
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789
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790
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791
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[ "Delta", "-", "v", "allocation", "to", "correct", "for", "insertion", "errors", "caused", "by", "state", "uncertainty", "is", "one", "of", "the", "key", "performance", "requirements", "imposed", "on", "the", "SLS", "Navigation", "System", ".", "Additionally", ",", "SLS", "mission", "requirements", "include", "the", "need", "for", "the", "Exploration", "Up", "-", "per", "Stage", "(", "EUS", ")", "to", "be", "disposed", "of", "successfully", ".", "To", "assess", "these", "requirements", ",", "the", "SLS", "navigation", "team", "has", "developed", "and", "implemented", "a", "series", "of", "analysis", "methods", ".", "Here", "the", "authors", "detail", "the", "Delta", "-", "Delta", "-", "V", "approach", "to", "assessing", "delta", "-", "v", "allocation", "as", "well", "as", "the", "EUS", "disposal", "optimization", "approach", "." ]
792
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[ "The", "cohesive", "energy", "and", "compressibility", "of", "strands", "of", "a", "single", "-", "wall", "nanotube", "rope", "has", "been", "computed", "using", "a", "new", "long", "-", "range", "potential", "energy", "function", "derived", "from", "accurate", "ab", "initio", "quantum", "chemistry", "calculations", "of", "the", "benzene", "dimer", "and", "calibrated", "for", "energetic", "and", "mechanical", "properties", "of", "graphite", "(", "at", "pressures", "up", "to", "12", "GPa", ")", ".", "We", "also", "use", "this", "potential", "to", "calculate", "a", "variety", "of", "properties", "of", "carbon", "nanotubes", "(", "both", "single-", "and", "multi", "-", "wall", ")", "and", "fullerenes", ".", "Extensive", "comparisons", "are", "made", "with", "previously", "published", "potentials", "." ]
793
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794
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795
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796
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797
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