TY  - GEN
A1  - Gronau, Norbert
T1  - Ermittlung der Zukunftsfähigkeit unternehmensweiter Anwendungssysteme
T1  - A process model for determination of future suitability of business application systems
N2  - Bei Entscheidungen über abzulösende oder neue Anwendungssysteme kann mit Hilfe funktionaler Anforderungen immer nur der gegenwärtige oder vorhersehbare Bedarf ermittelt werden. In einem turbulenten Umfeld sind die Anwendungssysteme jedoch häufig langere Zeit im Einsatz als die Anforderungen gültig sind, mit Hilfe derer sie ausgewählt wurden. An der Universität Potsdam wird im Rahmen des BMBF-Projektes CHANGE eine Vorgehensweise zur Ermittlung der Zukunftsfähigkeit unternehmensweiter Anwendungssysteme entwickelt, deren wesentliche Merkmale in diesem Beitrag beschrieben werden.
N2  - A process model for determination of future suitability of business application systems:  Before decisions concerning reinvestments or additional usage of business application systems can be made, functional requirements depending on the actual or foreseeable demand are collected. In turbulent circumstances business application systems like ERP systems are longer used than the requirements for their choice are valid. At the university of Potsdam within the german research project CHANGE a process model was developed which is able to determine the future suitability of business application systems investigating possible turbulences on the market and around the company.  --------- © GITO mbH Berlin
KW  - Enterprise-Resource-Planning
KW  - Anwendungssystem
KW  - Turbulenz
KW  - Wandlungsfähigkeit
KW  - IT-Assessment
KW  - Informationssystemarchitektur
KW  - ERP-System
KW  - adaptability
KW  - IT assessment
KW  - information system architecture
KW  - business application
KW  - ERP system
KW  - turbulence
Y1  - 2005
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-6843
ER  - 
TY  - GEN
A1  - Hoffmann, Mathias
A1  - Schulz-Hanke, Maximilian
A1  - Alba, Juana Garcia
A1  - Jurisch, Nicole
A1  - Hagemann, Ulrike
A1  - Sachs, Torsten
A1  - Sommer, Michael
A1  - Augustin, Jürgen
T1  - A simple calculation algorithm to separate high-resolution CH4 flux measurements into ebullition- and diffusion-derived components
T2  - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - Processes driving the production, transformation and transport of methane (CH4) in wetland ecosystems are highly complex. We present a simple calculation algorithm to separate open-water CH4 fluxes measured with automatic chambers into diffusion- and ebullition-derived components. This helps to reveal underlying dynamics, to identify potential environmental drivers and, thus, to calculate reliable CH4 emission estimates. The flux separation is based on identification of ebullition-related sudden concentration changes during single measurements. Therefore, a variable ebullition filter is applied, using the lower and upper quartile and the interquartile range (IQR). Automation of data processing is achieved by using an established R script, adjusted for the purpose of CH4 flux calculation. The algorithm was validated by performing a laboratory experiment and tested using flux measurement data (July to September 2013) from a former fen grassland site, which converted into a shallow lake as a result of rewetting. Ebullition and diffusion contributed equally (46 and 55 %) to total CH4 emissions, which is comparable to ratios given in the literature. Moreover, the separation algorithm revealed a concealed shift in the diurnal trend of diffusive fluxes throughout the measurement period. The water temperature gradient was identified as one of the major drivers of diffusive CH4 emissions, whereas no significant driver was found in the case of erratic CH4 ebullition events.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 604 
KW  - water methane emissions
KW  - chamber system
KW  - CO2
KW  - lake
KW  - fen
KW  - exchange
KW  - mechanism
KW  - turbulence
KW  - transport
KW  - reservior
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-416659
SN  - 1866-8372
IS  - 604
SP  - 109
EP  - 118
ER  -