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  • 1
  • 2
    Monograph available for loan
    Monograph available for loan
    Köln : EUREKA-COST-Büro
    Call number: M 98.0462
    Type of Medium: Monograph available for loan
    Pages: 253 S.
    Edition: Stand: Juli 1998
    Classification: E.7.
    Language: German
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 3
    Publication Date: 2011-04-08
    Description: Standard deviation of difference in zero crossing times of two identical sinewaves distorted by narrowband noise behaves similarly to average value of error, but deviation is approximately one order of magnitude larger.
    Keywords: ELECTRONIC SYSTEMS
    Type: GSC-11004
    Format: application/pdf
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  • 4
    Publication Date: 2019-07-13
    Description: A prototype of an expert system was developed which applies qualitative or model-based reasoning to the task of post-test analysis and diagnosis of data resulting from a rocket engine firing. A combined component-based and process theory approach is adopted as the basis for system modeling. Such an approach provides a framework for explaining both normal and deviant system behavior in terms of individual component functionality. The diagnosis function is applied to digitized sensor time-histories generated during engine firings. The generic system is applicable to any liquid rocket engine but was adapted specifically in this work to the Space Shuttle Main Engine (SSME). The system is applied to idealized data resulting from turbomachinery malfunction in the SSME.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-CR-184417 , NAS 1.26:184417 , UAH-RR-ME-90-101
    Format: application/pdf
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  • 5
    Publication Date: 2019-07-13
    Description: A prototype of an expert system was developed which applies qualitative constraint-based reasoning to the task of post-test analysis of data resulting from a rocket engine firing. Data anomalies are detected and corresponding faults are diagnosed. Engine behavior is reconstructed using measured data and knowledge about engine behavior. Knowledge about common faults guides but does not restrict the search for the best explanation in terms of hypothesized faults. The system contains domain knowledge about the behavior of common rocket engine components and was configured for use with the Space Shuttle Main Engine (SSME). A graphical user interface allows an expert user to intimately interact with the system during diagnosis. The system was applied to data taken during actual SSME tests where data anomalies were observed.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-CR-184279 , NAS 1.26:184279 , UAH-ME-91-101
    Format: application/pdf
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  • 6
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    In:  Geophysical Research Abtracts; Vol. 12, EGU2010-5332 ; Year: 2010
    Publication Date: 2013-10-16
    Description: Modern modelling approaches to post-glacial rebound (PGR) are based on several techniques ranging from purely analytical formulations to fully numerical methods. Various European teams nowadays are independently working on the post-glacial rebound process in order to constrain the rheological profile of the mantle and the extent and chronology of the late-Pleistocene ice sheets which are prerequisites for the determination of the PGR contribution to geodetic observables. With the aim of i) testing the codes currently in use by the various teams, ii) to establish a minimum set of agreed results, iii) correct possible systematic errors embedded in the various physical formulations and/or computer implementations, and iv) facilitate the dissemination of numerical tools for surface loading studies to the geodynamical community and to young scientists, we present a set of benchmark computations mainly based on models with spherical symmetry and viscoelastic rheology but also including inputs from finite elements modelers. This study is performed within the Working Group 4 of the ESF COST Action ES0701 “Improved constraints on models of Glacial Isostatic Adjustment” and focuses on i) load Love numbers and relaxation spectra, ii) the deformation and gravity variations driven by surface loads characterized by simple geometry and timehistory, and iii) the rotational fluctuations in response to glacial unloading
    Type: http://purl.org/eprint/type/ConferencePaper
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  • 7
    Publication Date: 2005-02-01
    Description: DNA translocases are molecular motors that move rapidly along DNA using adenosine triphosphate as the source of energy. We directly observed the movement of purified FtsK, an Escherichia coli translocase, on single DNA molecules. The protein moves at 5 kilobases per second and against forces up to 60 piconewtons, and locally reverses direction without dissociation. On three natural substrates, independent of its initial binding position, FtsK efficiently translocates over long distances to the terminal region of the E. coli chromosome, as it does in vivo. Our results imply that FtsK is a bidirectional motor that changes direction in response to short, asymmetric directing DNA sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pease, Paul J -- Levy, Oren -- Cost, Gregory J -- Gore, Jeff -- Ptacin, Jerod L -- Sherratt, David -- Bustamante, Carlos -- Cozzarelli, Nicholas R -- GM07232-27/GM/NIGMS NIH HHS/ -- GM08295-15/GM/NIGMS NIH HHS/ -- GM31657/GM/NIGMS NIH HHS/ -- GM32543/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Jan 28;307(5709):586-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3204, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15681387" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Bacteriophage lambda ; Base Sequence ; Chromosomes, Bacterial ; DNA, Bacterial/chemistry/*metabolism ; DNA, Superhelical/chemistry/metabolism ; DNA, Viral/chemistry/*metabolism ; Escherichia coli/*metabolism ; Escherichia coli Proteins/isolation & purification/*metabolism ; Kinetics ; Membrane Proteins/isolation & purification/*metabolism ; Models, Biological ; Molecular Motor Proteins/isolation & purification/*metabolism ; Nucleic Acid Conformation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2009-07-25
    Description: The toolbox of rat genetics currently lacks the ability to introduce site-directed, heritable mutations into the genome to create knockout animals. By using engineered zinc-finger nucleases (ZFNs) designed to target an integrated reporter and two endogenous rat genes, Immunoglobulin M (IgM) and Rab38, we demonstrate that a single injection of DNA or messenger RNA encoding ZFNs into the one-cell rat embryo leads to a high frequency of animals carrying 25 to 100% disruption at the target locus. These mutations are faithfully and efficiently transmitted through the germline. Our data demonstrate the feasibility of targeted gene disruption in multiple rat strains within 4 months time, paving the way to a humanized monoclonal antibody platform and additional human disease models.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831805/" 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/PMC2831805/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geurts, Aron M -- Cost, Gregory J -- Freyvert, Yevgeniy -- Zeitler, Bryan -- Miller, Jeffrey C -- Choi, Vivian M -- Jenkins, Shirin S -- Wood, Adam -- Cui, Xiaoxia -- Meng, Xiangdong -- Vincent, Anna -- Lam, Stephen -- Michalkiewicz, Mieczyslaw -- Schilling, Rebecca -- Foeckler, Jamie -- Kalloway, Shawn -- Weiler, Hartmut -- Menoret, Severine -- Anegon, Ignacio -- Davis, Gregory D -- Zhang, Lei -- Rebar, Edward J -- Gregory, Philip D -- Urnov, Fyodor D -- Jacob, Howard J -- Buelow, Roland -- 5P01HL082798-03/HL/NHLBI NIH HHS/ -- 5U01HL066579-08/HL/NHLBI NIH HHS/ -- P01 HL082798/HL/NHLBI NIH HHS/ -- P01 HL082798-03/HL/NHLBI NIH HHS/ -- U01 HL066579/HL/NHLBI NIH HHS/ -- U01 HL066579-08/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2009 Jul 24;325(5939):433. doi: 10.1126/science.1172447.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI 52336, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19628861" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Dna ; Embryo, Mammalian ; Endodeoxyribonucleases/genetics/*metabolism ; Feasibility Studies ; Female ; *Gene Knockout Techniques ; Green Fluorescent Proteins ; Immunoglobulin M/*genetics ; Male ; *Microinjections ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; RNA, Messenger ; Rats ; *Zinc Fingers/genetics ; rab GTP-Binding Proteins/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2011-07-20
    Description: Zinc-finger nucleases (ZFNs) are powerful tools for producing gene knockouts (KOs) with high efficiency. Whereas ZFN-mediated gene disruption has been demonstrated in laboratory animals such as mice, rats, and fruit flies, ZFNs have not been used to disrupt an endogenous gene in any large domestic species. Here we used ZFNs to induce a biallelic knockout of the porcine α1,3-galactosyltransferase (GGTA1) gene. Primary porcine fibroblasts were treated with ZFNs designed against the region coding for the catalytic core of GGTA1, resulting in biallelic knockout of ∼1% of ZFN-treated cells. A galactose (Gal) epitope counter-selected population of these cells was used in somatic cell nuclear transfer (SCNT). Of the resulting six fetuses, all completely lacked Gal epitopes and were phenotypically indistinguishable from the starting donor cell population, illustrating that ZFN-mediated genetic modification did not interfere with the cloning process. Neither off-target cleavage events nor integration of the ZFN-coding plasmid was detected. The GGTA1-KO phenotype was confirmed by a complement lysis assay that demonstrated protection of GGTA1-KO fibroblasts relative to wild-type cells. Cells from GGTA1-KO fetuses and pooled, transfected cells were used to produce live offspring via SCNT. This study reports the production of cloned pigs carrying a biallelic ZFN-induced knockout of an endogenous gene. These findings open a unique avenue toward the creation of gene KO pigs, which could benefit both agriculture and biomedicine.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 10
    Publication Date: 2013-07-19
    Description: Down's syndrome is a common disorder with enormous medical and social costs, caused by trisomy for chromosome 21. We tested the concept that gene imbalance across an extra chromosome can be de facto corrected by manipulating a single gene, XIST (the X-inactivation gene). Using genome editing with zinc finger nucleases, we inserted a large, inducible XIST transgene into the DYRK1A locus on chromosome 21, in Down's syndrome pluripotent stem cells. The XIST non-coding RNA coats chromosome 21 and triggers stable heterochromatin modifications, chromosome-wide transcriptional silencing and DNA methylation to form a 'chromosome 21 Barr body'. This provides a model to study human chromosome inactivation and creates a system to investigate genomic expression changes and cellular pathologies of trisomy 21, free from genetic and epigenetic noise. Notably, deficits in proliferation and neural rosette formation are rapidly reversed upon silencing one chromosome 21. Successful trisomy silencing in vitro also surmounts the major first step towards potential development of 'chromosome therapy'.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3848249/" 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/PMC3848249/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, Jun -- Jing, Yuanchun -- Cost, Gregory J -- Chiang, Jen-Chieh -- Kolpa, Heather J -- Cotton, Allison M -- Carone, Dawn M -- Carone, Benjamin R -- Shivak, David A -- Guschin, Dmitry Y -- Pearl, Jocelynn R -- Rebar, Edward J -- Byron, Meg -- Gregory, Philip D -- Brown, Carolyn J -- Urnov, Fyodor D -- Hall, Lisa L -- Lawrence, Jeanne B -- 1F32CA154086/CA/NCI NIH HHS/ -- 2T32HD007439/HD/NICHD NIH HHS/ -- F32 CA154086/CA/NCI NIH HHS/ -- GM053234/GM/NIGMS NIH HHS/ -- GM085548/GM/NIGMS NIH HHS/ -- GM096400 RC4/GM/NIGMS NIH HHS/ -- MOP-13680/Canadian Institutes of Health Research/Canada -- R01 GM053234/GM/NIGMS NIH HHS/ -- R01 GM085548/GM/NIGMS NIH HHS/ -- RC4 GM096400/GM/NIGMS NIH HHS/ -- T32 HD007439/HD/NICHD NIH HHS/ -- England -- Nature. 2013 Aug 15;500(7462):296-300. doi: 10.1038/nature12394. Epub 2013 Jul 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, Massachusetts 01655, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23863942" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Proliferation ; Chromosomes, Human, Pair 21/*genetics ; DNA Methylation ; *Dosage Compensation, Genetic ; Down Syndrome/*genetics/therapy ; Gene Silencing ; Humans ; Induced Pluripotent Stem Cells ; Male ; Mice ; Mutagenesis, Insertional ; Neurogenesis ; RNA, Long Noncoding/genetics/*metabolism ; Sex Chromatin/genetics ; X Chromosome Inactivation/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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