ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Kinetic Energy Method for Predicting Initiation of Backward Erosion in Earthen Dams and Levees (2014)
    Association of Engineering Geologists (AEG)
    Details
    Publication Date: 2014-01-29
    Description: Current methods to evaluate the potential risk of earthen dam and levee failures by internal erosion fail to consider appropriate failure criteria for the initiation, continuation, and progression phases and are often based on subjective assessment. Six different internal erosion failure modes may occur within a dam or levee, its abutments, or the foundation that are triggered or facilitated by different mechanisms and therefore have different failure criteria. In non-cohesive soils, suffusion, backward erosion, heave, or concentrated leak erosion (scour) are possible, although the physical mechanisms driving the failure criterion for each of these are very different. Currently, no credible failure criteria exist for evaluation of the initiation of backward erosion. This article presents derivation of a specific failure criterion for initiation of backward erosion in non-cohesive soils using the critical kinetic energy ( E kcrit ) of initiation. Laboratory experiments conducted with different soils showed that E kcrit is affected by the physical characteristics of the soil, effective stress conditions, and angle of the seepage path. In internally stable, non-cohesive soils (e.g., uniform medium sands) with up to 6 percent non-plastic fines, backward erosion initiated when the E kcrit of seepage exceeded 0.075 Joules. In non-cohesive soils with 10 percent non-plastic fines, which are also prone to suffusion, the E kcrit for backward erosion is reduced by a factor of as much as 100. Moreover, in soil with 20 percent plastic fines, initiation of backward erosion did not occur. Concentrated leak erosion along hydraulic-induced fractures was the dominant process of internal erosion in soils with plastic fines. A new backward erosion assessment methodology based on the factor of safety is proposed for initiation of backward erosion that relates the laboratory-derived E kcrit and the anticipated maximum actual kinetic energy, as measured in the field or estimated during design. The advantage of this method is that laboratory-derived E kcrit can take into account the natural factors that affect initiation of backward erosion. Several examples are presented to demonstrate the application of the factor of safety methodology under typical field conditions.
    Print ISSN: 1078-7275
    Topics: Geosciences
    Published by Association of Engineering Geologists (AEG)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Solar Power Generation (2013)
    Hindawi
    Details
    Publication Date: 2013-09-11
    Print ISSN: 1110-662X
    Electronic ISSN: 1687-529X
    Topics: Electrical Engineering, Measurement and Control Technology , Energy, Environment Protection, Nuclear Power Engineering
    Published by Hindawi
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Design and engineering of an O(2) transport protein (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-03-20
    Description: The principles of natural protein engineering are obscured by overlapping functions and complexity accumulated through natural selection and evolution. Completely artificial proteins offer a clean slate on which to define and test these protein engineering principles, while recreating and extending natural functions. Here we introduce this method with the design of an oxygen transport protein, akin to human neuroglobin. Beginning with a simple and unnatural helix-forming sequence with just three different amino acids, we assembled a four-helix bundle, positioned histidines to bis-histidine ligate haems, and exploited helical rotation and glutamate burial on haem binding to introduce distal histidine strain and facilitate O(2) binding. For stable oxygen binding without haem oxidation, water is excluded by simple packing of the protein interior and loops that reduce helical-interface mobility. O(2) affinities and exchange timescales match natural globins with distal histidines, with the remarkable exception that O(2) binds tighter than CO.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3539743/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3539743/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koder, Ronald L -- Anderson, J L Ross -- Solomon, Lee A -- Reddy, Konda S -- Moser, Christopher C -- Dutton, P Leslie -- R01 GM041048/GM/NIGMS NIH HHS/ -- England -- Nature. 2009 Mar 19;458(7236):305-9. doi: 10.1038/nature07841.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Johnson Research Foundation, Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19295603" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Transport ; Carbon Monoxide/metabolism ; Carrier Proteins/*chemical synthesis/chemistry/*metabolism ; Drug Design ; Globins/chemistry ; Glutamic Acid/metabolism ; Heme/metabolism ; Histidine/metabolism ; Humans ; Kinetics ; Ligands ; Nerve Tissue Proteins/chemistry ; Oxidation-Reduction ; Oxygen/*metabolism ; *Protein Engineering ; Protein Structure, Secondary ; Rotation ; Spectroscopy, Fourier Transform Infrared ; Substrate Specificity ; Water/analysis/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Virus sharing, genetic sequencing, and global health security (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-09-13
    Description: This Perspective focuses on the future of the Pandemic Influenza Preparedness (PIP) Framework, which was initially established to promote the fair sharing of public health-related pandemic influenza samples between countries. We examine the changes that need to be made to address the growing likelihood that genetic sequence data might be shared instead of physical virus samples, as well as the need to expand the PIP framework's scope and to improve its fairness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gostin, Lawrence O -- Phelan, Alexandra -- Stoto, Michael A -- Kraemer, John D -- Reddy, K Srinath -- New York, N.Y. -- Science. 2014 Sep 12;345(6202):1295-6. doi: 10.1126/science.1257622.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉O'Neill Institute for National and Global Health Law, Georgetown University Law Center, Washington, DC 20001, USA. ; Department of Health Systems Administration, Georgetown University, Washington, DC 20057, USA. ; O'Neill Institute for National and Global Health Law, Georgetown University Law Center, Washington, DC 20001, USA. Department of Health Systems Administration, Georgetown University, Washington, DC 20057, USA. ; President, Public Health Foundation of India, New Delhi 110070, India.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25214618" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Disaster Planning ; *Global Health ; Health Services Accessibility ; Humans ; Influenza A Virus, H1N1 Subtype/*genetics ; Influenza A Virus, H5N1 Subtype/*genetics ; *Influenza Vaccines ; Influenza in Birds/epidemiology/prevention & control ; Influenza, Human/epidemiology/*prevention & control/virology ; Intellectual Property ; Orthomyxoviridae Infections/prevention & control/virology ; Pandemics/*prevention & control/veterinary ; Poultry ; Sequence Analysis, DNA ; Swine
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Optimization of woven jute/glass fibre-reinforced polyester hybrid composite solar parabolic trough collector (2017)
    Institute of Physics (IOP)
    Details
    Publication Date: 2017-07-25
    Description: In the present work, structural analysis of 5.77m × 4m woven jute (J)/glass (G) fibre-reinforced polyester hybrid composite solar parabolic trough is carried out based on trough parameters to obtain the minimum RMS local slope deviation, termed as SDx value under gravity loading. The optimization is done by varying parameters viz. direction and size of reinforced conduits, stacking number and sequence of hybrid trough laminate at fibre orientation of Δθ=45° and Δθ=60° amongst the layers at 0° collector angle. The analysis revealed that the configuration in which the conduits are placed in both X and Y directions is preferred over other configurations to scale down the effect of wind loads. Furthermore it has been observed that laminate of the order [0° G /45° G /-45° J /90° J ] s undergoes minimum surface deformation amongst all the other configurations at conduit reinforcement in both X and Y directions for a conduit thickness of 0....
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Design, Development, and Analysis of a Densely Packed 500x Concentrating Photovoltaic Cell Assembly on Insulated Metal Substrate (2015)
    Hindawi
    Details
    Publication Date: 2015-08-21
    Description: The paper presents a novel densely packed assembly for high concentrating photovoltaic applications, designed to fit 125x primary and 4x secondary reflective optics. This assembly can accommodate 144 multijunction cells and is one of the most populated modules presented so far. Based on the thermal simulation results, an aluminum-based insulated metal substrate has been used as baseplate; this technology is commonly exploited for Light Emitting Diode applications, due to its optimal thermal management. The original outline of the conductive copper layer has been developed to minimize Joule losses by reducing the number of interconnections among the cells in series. Oversized Schottky diodes have been employed for bypassing purposes. The whole design fits the IPC-2221 requirements. The plate has been manufactured using standard electronic processes and then characterized through an indoor test and the results are here presented and commented on. The assembly achieves a fill factor above 80% and an efficiency of 29.4% at 500x, less than 2% lower than that of a single cell commercial receiver. The novel design of the conductive pattern is conceived to decrease the power losses and the deployment of an insulated metal substrate represents an improvement towards the awaited cost-cutting for high concentrating photovoltaic technologies.
    Print ISSN: 1110-662X
    Electronic ISSN: 1687-529X
    Topics: Electrical Engineering, Measurement and Control Technology , Energy, Environment Protection, Nuclear Power Engineering
    Published by Hindawi
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    Electronic Resource
    Electronic Resource
    Kinetic, structural, and spectroscopic indentification of geminate states of myoglobin: a ligand binding site on the reaction pathway (1987)
    s.l. : American Chemical Society
    Biochemistry 26 (1987), S. 4785-4796 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00389a028
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Structural differences in solution and crystalline forms of metmyoglobin (1991)
    s.l. : American Chemical Society
    Biochemistry 30 (1991), S. 9116-9120 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00101a030
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    A biogeochemical study of the Podili and Tirupati area of Andhra Pradesh, India (1999)
    Springer
    Environmental geology 37 (1999), S. 313-316 
    Details
    ISSN: 1432-0495
    Keywords: Key words Biogeochemical study ; Dung ; Urine ; Milk ; Fluoride ; Grazing animals ; Podili ; Tirupati
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The fluoride content of dung, urine and milk of grazing animals, for example cow, she-buffalo, doe and ewe, was studied in the Podili area, India, (endemic fluorosis) and also in Tirupati (non-fluorosis) for the purpose of comparison. The data reveal that the fluoride content of the urine of animals is suitable for the preparation of biogeochemical atlases studying the environmental effect in relation to health.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050389
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Nitrate reductase and nitrate accumulation in relation to nitrate toxicity in Boronia megastigma (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 78 (1990), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Moderate levels of N were toxic to the native Australian plant boronia (Boronia megastigma Nees). As NO-3 is the major N form available for plants under cultivated conditions, NO-3 reduction and accumulation patterns in boronia were examined following the supply of various levels of NO-3 to understand the physiological basis of this toxicity. At a low level of supplied NO-3 [15 mmol (plant)-1], NO-3 was reduced without any detectable accumulation and without nitrate reductase activity (NRA) reaching its maximum capacity. When higher NO-3 levels [≥25 mmol (plant)-1] were supplied, both NRA and NO-3 accumulation increased further. However, NRA increased to a maximum of ca 500 nmol NO-3 (g fresh weight)-1 h-1, both in the roots and leaves, irrespective of a 4-fold difference in the levels of supplied NO-3, whereas NO-3 continued to accumulate in proportion to the level of supplied NO-3. Chlorotic toxicity symptoms appeared on the leaves at an accumulation of ca 32 μmol NO-3 (g fresh weight)-1. High endogenous NO-3 concentrations inhibited NRA. The low level of NRA in boronia was not limited by NO-3 or electron donor availability. It is concluded that the low NR enzyme activity is a genetic adaptation to the low NO-3 availability in the native soils of boronia. Thus, when NO-3 supply is high, the plat cannot reduce it at high rates, leading to large and toxic accumulations of the ion in the leaf tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1990.tb09059.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...