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  • Springer  (57)
  • American Association for the Advancement of Science (AAAS)  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Flight service environmental effects on composite materials and structures (1994)
    Springer
    Advanced performance materials 1 (1994), S. 51-85 
    Details
    ISSN: 1572-8765
    Keywords: composite materials ; environmental effects ; long-term durability ; flight service
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract NASA Langley and the U.S. Army have jointly sponsored programs to assess the effects of realistic flight environments and ground-based exposure on advanced composite materials and structures. Composite secondary structural components were initially installed on commercial transport aircraft in 1973; secondary and primary structural components were installed on commercial helicopters in 1979; and primary structural components were installed on commercial aircraft in the mid-to-late 1980's. Over 5.3 million total component flight hours have been accumulated on 350 composite components since 1973. Service performance, maintenance characteristics, and residual strength of numerous composite components are reported. In addition to data on flight components; 10-year ground-based exposure test results on material coupons are reported. Comparisons between flight and ground-based environmental effects for several composite material systems are also presented. Test results indicate excellent in-service performance with the composite components during the 15 year evaluation period. Good correlation between ground-based material performance and operational structural performance has been achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705313
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  • 2
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    The relaxation response: therapeutic effect (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benson, H -- New York, N.Y. -- Science. 1997 Dec 5;278(5344):1694-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9411784" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; *Mental Healing ; *Relaxation Therapy
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Paleoceanographic events and deep-sea ostracodes (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-06-22
    Description: Eight recognized or theorized paleoceanographic events during the past 70 million years were tested against changes in the global deep-sea benthic ostracode fauna. Two events, the sudden Cretaceous-Tertiary boundary event at 66 million years ago and the more gradual 40-million-year event (formation of the psychrosphere), show up most dramatically. Before the 40-million-year event, ostracodes freely radiated into the deeper water regions but were provincial. The development of thermal stratification isolated these deep-water taxa, mostly the survivors of the Cretaceous-Tertiary boundary event, which adapted to a new, free-flowing but more frigid ecosystem and spread rapidly throughout the world.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benson, R H -- Chapman, R E -- Deck, L T -- New York, N.Y. -- Science. 1984 Jun 22;224(4655):1334-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17837191" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Reduced sympathetic nervous system responsivity associated with the relaxation response (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-01-08
    Description: Sympathetic nervous system activity was assessed in experimental and control subjects who were exposed to graded orthostatic and isometric stress during monthly hospital visits. After the first session, the experimental subjects practiced a technique that elicited the relaxation response. Their concentrations of plasma norepinephrine during subsequent graded stresses were significantly higher. No such changes were noted in the control group. These results were than replicated in the control group in a crossover experiment. The groups did not differ in their heart rate and blood pressure responses. These observations are consistent with reduced norepinephrine end-organ responsivity after regular elicitation of the relaxation response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffman, J W -- Benson, H -- Arns, P A -- Stainbrook, G L -- Landsberg, G L -- Young, J B -- Gill, A -- HL-07374/HL/NHLBI NIH HHS/ -- HL-22727/HL/NHLBI NIH HHS/ -- HL-24084/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 8;215(4529):190-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7031901" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Blood Pressure ; Female ; Heart Rate ; Humans ; Male ; *Muscle Contraction ; *Muscle Relaxation ; Norepinephrine/blood ; *Relaxation Therapy ; Stress, Physiological/physiopathology ; Sympathetic Nervous System/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    A dynamic ocean management tool to reduce bycatch and support sustainable fisheries (2018)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2018-05-31
    Description: Seafood is an essential source of protein for more than 3 billion people worldwide, yet bycatch of threatened species in capture fisheries remains a major impediment to fisheries sustainability. Management measures designed to reduce bycatch often result in significant economic losses and even fisheries closures. Static spatial management approaches can also be rendered ineffective by environmental variability and climate change, as productive habitats shift and introduce new interactions between human activities and protected species. We introduce a new multispecies and dynamic approach that uses daily satellite data to track ocean features and aligns scales of management, species movement, and fisheries. To accomplish this, we create species distribution models for one target species and three bycatch-sensitive species using both satellite telemetry and fisheries observer data. We then integrate species-specific probabilities of occurrence into a single predictive surface, weighing the contribution of each species by management concern. We find that dynamic closures could be 2 to 10 times smaller than existing static closures while still providing adequate protection of endangered nontarget species. Our results highlight the opportunity to implement near real-time management strategies that would both support economically viable fisheries and meet mandated conservation objectives in the face of changing ocean conditions. With recent advances in eco-informatics, dynamic management provides a new climate-ready approach to support sustainable fisheries.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
    Electronic Resource
    Electronic Resource
    Applications of the INDO method to some radicals containing second row elements (1971)
    Springer
    Theoretical chemistry accounts 23 (1971), S. 259-265 
    Details
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die INDO Molekularorbital-Methode wurde so erweitert, daß sie auch auf Atome der 2. Periode anwendbar ist. Es wurden die Gleichgewichtsgeometrien für einige Si und Cl enthaltende Radikale berechnet. Die ebenfalls errechneten Hyperfeinkopplungs-Konstanten werden mit Resultaten aus ESR Experimenten verglichen. Für organische Radikale erhält man Chlor-Hyperfein-Aufspaltungen in guter Übereinstimmung mit neueren experimentellen Werten.
    Notes: Abstract The INDO molecular orbital method has been extended to allow for the inclusion of second row atoms. Equilibrium geometries have been calculated for several radicals containing Si and Cl and their hyperfine coupling constants compared with results from ESR experiments. The calculations give chlorine hyperfine splittings in organic radicals in good agreement with recently reported experimental values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00530235
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchung von Wasser (1932)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 88 (1932), S. 139-144 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01579105
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  • 8
    Electronic Resource
    Electronic Resource
    Über die Analyse von Sulfitablaugen (1939)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 116 (1939), S. 222-222 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01358943
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  • 9
    Electronic Resource
    Electronic Resource
    Outcome-Space Cutting-Plane Algorithm for Linear Multiplicative Programming (2000)
    Springer
    Journal of optimization theory and applications 104 (2000), S. 301-322 
    Details
    ISSN: 1573-2878
    Keywords: global optimization ; multiplicative programming ; cutting plane ; nonconvex programming ; outcome space ; extreme-point search
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This article presents an outcome-space pure cutting-plane algorithm for globally solving the linear multiplicative programming problem. The framework of the algorithm is taken from a pure cutting-plane decision set-based method developed by Horst and Tuy for solving concave minimization problems. By adapting this method to an outcome-space reformulation of the linear multiplicative programming problem, rather than applying directly the method to the original decision-set formulation, it is expected that considerable computational savings can be obtained. Also, we show how additional computational benefits might be obtained by implementing the new algorithm appropriately. To illustrate the new algorithm, we apply it to the solution of a sample problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004657629105
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  • 10
    Electronic Resource
    Electronic Resource
    Algorithms for parametric nonconvex programming (1982)
    Springer
    Journal of optimization theory and applications 38 (1982), S. 319-340 
    Details
    ISSN: 1573-2878
    Keywords: Nonconvex programming ; parametric programming ; branch-and-bound methods ; global minimization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, we consider a general family of nonconvex programming problems. All of the objective functions of the problems in this family are identical, but their feasibility regions depend upon a parameter ϑ. This family of problems is called a parametric nonconvex program (PNP). Solving (PNP) means finding an optimal solution for every program in the family. A prototype branch-and-bound algorithm is presented for solving (PNP). By modifying a prototype algorithm for solving a single nonconvex program, this algorithm solves (PNP) in one branch-and-bound search. To implement the algorithm, certain compact partitions and underestimating functions must be formed in an appropriate manner. We present an algorithm for solving a particular (PNP) which implements the prototype algorithm by forming compact partitions and underestimating functions based upon rules given by Falk and Soland. The programs in this (PNP) have the same concave objective function, but their feasibility regions are described by linear constraints with differing right-hand sides. Computational experience with this algorithm is reported for various problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00935342
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