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  1. Book ; Online: A normal form for grid forming power grid components

    Kogler, Raphael / Plietzsch, Anton / Schultz, Paul / Hellmann, Frank

    2021  

    Abstract: Future power grids will be operating a large number of heterogeneous dynamical actors. Many of these will contribute to the fundamental dynamical stability of the system. By taking a complexity theoretic perspective we derive a normal form for grid ... ...

    Abstract Future power grids will be operating a large number of heterogeneous dynamical actors. Many of these will contribute to the fundamental dynamical stability of the system. By taking a complexity theoretic perspective we derive a normal form for grid forming components in power grids. This allows analyzing the grids systemic properties without the need for detailed technical models. Our approach is based on the physics of the power flow in the grid on the one hand, and on the common symmetry that is inherited from the control objectives grid-forming power grid components are trying to achieve. We provide a first experimental validation that this normal form can capture the behavior of complex grid forming inverters without any knowledge of the underlying technology, and show that it can be used to make technology independent statements on the stability of future grids.
    Keywords Nonlinear Sciences - Adaptation and Self-Organizing Systems ; Electrical Engineering and Systems Science - Systems and Control
    Subject code 600
    Publishing date 2021-06-01
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Thesis: Measurement of jet production in deep-inelastic ep scattering at HERA

    Kogler, Roman

    (DESY-Thesis ; 2011,3)

    2011  

    Author's details by R. Kogler
    Series title DESY-Thesis ; 2011,3
    Language English
    Size IV, 276 S., Ill., graph. Darst.
    Publisher DESY
    Publishing place Hamburg
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., FB Physik, Diss.--Hamburg, 2010
    Note Literaturverz. S. 259 - 274
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. Article ; Online: Occupational Accidents with Agricultural Machinery in Austria.

    Kogler, Robert / Quendler, Elisabeth / Boxberger, Josef

    Journal of agromedicine

    2016  Volume 21, Issue 1, Page(s) 61–70

    Abstract: The number of recognized accidents with fatalities during agricultural and forestry work, despite better technology and coordinated prevention and trainings, is still very high in Austria. The accident scenarios in which people are injured are very ... ...

    Abstract The number of recognized accidents with fatalities during agricultural and forestry work, despite better technology and coordinated prevention and trainings, is still very high in Austria. The accident scenarios in which people are injured are very different on farms. The common causes of accidents in agriculture and forestry are the loss of control of machine, means of transport or handling equipment, hand-held tool, and object or animal, followed by slipping, stumbling and falling, breakage, bursting, splitting, slipping, fall, and collapse of material agent. In the literature, a number of studies of general (machine- and animal-related accidents) and specific (machine-related accidents) agricultural and forestry accident situations can be found that refer to different databases. From the database Data of the Austrian Workers Compensation Board (AUVA) about occupational accidents with different agricultural machinery over the period 2008-2010 in Austria, main characteristics of the accident, the victim, and the employer as well as variables on causes and circumstances by frequency and contexts of parameters were statistically analyzed by employing the chi-square test and odds ratio. The aim of the study was to determine the information content and quality of the European Statistics on Accidents at Work (ESAW) variables to evaluate safety gaps and risks as well as the accidental man-machine interaction.
    MeSH term(s) Accidents, Occupational/mortality ; Accidents, Occupational/statistics & numerical data ; Adult ; Agricultural Workers' Diseases/epidemiology ; Agriculture/instrumentation ; Agriculture/statistics & numerical data ; Austria/epidemiology ; Databases, Factual ; Farmers/statistics & numerical data ; Female ; Forestry/statistics & numerical data ; Humans ; Male ; Middle Aged ; Odds Ratio ; Workplace ; Wounds and Injuries/epidemiology
    Language English
    Publishing date 2016
    Publishing country England
    Document type Journal Article
    ZDB-ID 1289325-0
    ISSN 1545-0813 ; 1059-924X
    ISSN (online) 1545-0813
    ISSN 1059-924X
    DOI 10.1080/1059924X.2015.1075451
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 6210: Show issues

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  4. Article ; Online: Occupational accidents with mowing machines in Austrian agriculture.

    Kogler, Robert / Quendler, Elisabeth / Boxberger, Josef

    Annals of agricultural and environmental medicine : AAEM

    2015  Volume 22, Issue 1, Page(s) 137–141

    Abstract: The number of recognized accidents during agricultural work is still very high in Austria. In the years 2008 to 2009, there occurred 84 approved work accidents with mowing machines. The main causes of accidents were the loss of control of machines, ... ...

    Abstract The number of recognized accidents during agricultural work is still very high in Austria. In the years 2008 to 2009, there occurred 84 approved work accidents with mowing machines. The main causes of accidents were the loss of control of machines, transportations or conveyances, hand tools, objects or animals. In the literature, numerous studies of general agricultural and forestry accident situations are available. Detailed studies on specific types of agricultural machines, which describe concrete circumstances and causes of accidents, are in limited numbers. The accident database from the General Accident Insurance Institution and the Austrian Social Insurance Institution of Farmers, with personal and accidental data information about mowing machine accidents, were analyzed. The results showed that most accidents occurred on mixed agricultural farms (68%). The majority of the injured persons were male (86%), over 40-years-old (86%) with an agricultural or forestry education (91%). The most common accidents occurred in the summer months (69%) and on afternoons during the working week (79%). The majority of accidents were caused by contact with the machine (55%) and the loss of control (73%) during their operation (60%) and harvesting work (63%). The most frequently injuries were wounds, fractures and superficial injuries (81%) to the upper and lower extremities (66%). The results of the chi-square test showed significant correlations between the specific task with the form of contact, the working process, the day and season. Results of the odds ratio determination showed an increased risk of suffering serious injury for men in the first half of the year and half of the day due to loss of control over the machine during agricultural harvesting work.
    MeSH term(s) Accidents, Occupational/statistics & numerical data ; Adult ; Agriculture/instrumentation ; Australia/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Wounds and Injuries/epidemiology ; Wounds and Injuries/etiology
    Language English
    Publishing date 2015
    Publishing country Poland
    Document type Journal Article
    ZDB-ID 1215115-4
    ISSN 1898-2263 ; 1232-1966
    ISSN (online) 1898-2263
    ISSN 1232-1966
    DOI 10.5604/12321966.1141383
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4242: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  5. Book ; Online: PowerDynamics.jl -- An experimentally validated open-source package for the dynamical analysis of power grids

    Plietzsch, Anton / Kogler, Raphael / Auer, Sabine / Merino, Julia / Gil-de-Muro, Asier / Liße, Jan / Vogel, Christina / Hellmann, Frank

    2021  

    Abstract: PowerDynamics.jl is a Julia package for time-domain modeling of power grids that is specifically designed for the stability analysis of systems with high shares of renewable energies. It makes use of Julia's state-of-the-art differential equation solvers ...

    Abstract PowerDynamics.jl is a Julia package for time-domain modeling of power grids that is specifically designed for the stability analysis of systems with high shares of renewable energies. It makes use of Julia's state-of-the-art differential equation solvers and is highly performant even for systems with a large number of components. Further, it is compatible with Julia's machine learning libraries and allows for the utilization of these methods for dynamical optimization and parameter fitting. The package comes with a number of predefined models for synchronous machines, transmission lines and inverter systems. However, the strict open-source approach and a macro-based user-interface also allows for an easy implementation of custom-built models which makes it especially interesting for the design and testing of new control strategies for distributed generation units. This paper presents how the modeling concept, implemented component models and fault scenarios have been experimentally tested against measurements in the microgrid lab of TECNALIA.
    Keywords Electrical Engineering and Systems Science - Systems and Control
    Subject code 004
    Publishing date 2021-01-06
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Book: Ionenstrahlgestützte und thermische Umordungsprozesse in Halbleitermaterial

    Kögler, R

    Abschlußbericht

    1990  

    Institution Institut für Ionenstrahlphysik und Materialforschung
    Author's details Forschungszentrum Rossendorf, Institut für Ionenstrahlphysik und Materialforschung. R. Kögler
    Language German
    Size [14] Bl, graph. Darst
    Publishing place Dresden
    Document type Book
    Note Förderkennzeichen BMFT 03-KO3ROS 7
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  8. Book: Gedenkschrift für Herrn Dr. Rudolf Kögler

    Kögler, Rudolf

    1996  

    Institution Vereinigung Schweizerischer Unternehmen in Deutschland
    Author's details Vereinigung schweizerischer Unternehmen in Deutschland
    Keywords Steuerrecht ; Unternehmensbesteuerung ; Internationales Steuerrecht ; Welt ; Schweiz ; Kögler
    Language German
    Size 104 S
    Document type Book
    Database ECONomics Information System

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  9. Article: A Novel Method to Fabricate Silicon Nanowire p-n Junctions by a Combination of Ion Implantation and in-situ Doping.

    Kanungo, Pratyushdas / Kögler, Reinhard / Werner, Peter / Gösele, Ulrich / Skorupa, Wolfgang

    Nanoscale research letters

    2009  Volume 5, Issue 1, Page(s) 243–246

    Abstract: We demonstrate a novel method to fabricate an axial p-n junction inside ... oriented short vertical silicon nanowires grown by molecular beam epitaxy by combining ion implantation with in-situ doping. The lower halves of the nanowires were doped in- ... ...

    Abstract We demonstrate a novel method to fabricate an axial p-n junction inside <111> oriented short vertical silicon nanowires grown by molecular beam epitaxy by combining ion implantation with in-situ doping. The lower halves of the nanowires were doped in-situ with boron (concentration ~1018cm-3), while the upper halves were doubly implanted with phosphorus to yield a uniform concentration of 2 × 1019 cm-3. Electrical measurements of individually contacted nanowires showed excellent diode characteristics and ideality factors close to 2. We think that this value of ideality factors arises out of a high rate of carrier recombination through surface states in the native oxide covering the nanowires.
    Language English
    Publishing date 2009-11-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2253244-4
    ISSN 1556-276X ; 1931-7573
    ISSN (online) 1556-276X
    ISSN 1931-7573
    DOI 10.1007/s11671-009-9472-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book ; Online: Data Preservation in High Energy Physics

    Kogler, Roman / South, David M. / Steder, Michael

    2011  

    Abstract: Data from high-energy physics experiments are collected with significant financial and human effort and are mostly unique. However, until recently no coherent strategy existed for data preservation and re-use, and many important and complex data sets ... ...

    Abstract Data from high-energy physics experiments are collected with significant financial and human effort and are mostly unique. However, until recently no coherent strategy existed for data preservation and re-use, and many important and complex data sets have simply been lost. While the current focus is on the LHC at CERN, in the current period several important and unique experimental programs at other facilities are coming to an end, including those at HERA, b-factories and the Tevatron. To address this issue, an inter-experimental study group on HEP data preservation and long-term analysis (DPHEP) was convened at the end of 2008. The group now aims to publish a full and detailed review of the present status of data preservation in high energy physics. This contribution summarises the results of the DPHEP study group, describing the challenges of data preservation in high energy physics and the group's first conclusions and recommendations. The physics motivation for data preservation, generic computing and preservation models, technological expectations and governance aspects at local and international levels are examined.

    Comment: 8 pages, 6 figures, proceedings of ACAT 2011 poster
    Keywords High Energy Physics - Experiment ; Computer Science - Digital Libraries
    Subject code 028
    Publishing date 2011-11-11
    Publishing country us
    Document type Book ; Online
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