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2011

Measuring the flow in lean software development

Petersen, K. ., & Wohlin, C. . (2011). Measuring the flow in lean software development. Software: Practice and Experience, 41, 975–996.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2011

Journal Article

Kai Petersen

Claes Wohlin
Informatics in Radiology: Use of a C-Arm Fluoroscopy Simulator to Support Training in Intraoperative Radiography

Bott, O. ., Dresing, K. ., Wagner, M. ., Raab, B.-W. ., & Teistler, M. . (2011). Informatics in Radiology: Use of a C-Arm Fluoroscopy Simulator to Support Training in Intraoperative Radiography. RadioGraphics, 31, E65-E75. http://doi.org/10.1148/rg.313105125

Abstract

Mobile image intensifier systems (C-arms) are used frequently in orthopedic and reconstructive surgery, especially in trauma and emergency settings, but image quality and radiation exposure levels may vary widely, depending on the extent of the C-arm operator s knowledge and experience. Current training programs consist mainly of theoretical instruction in C-arm operation, the physical foundations of radiography, and radiation avoidance, and are largely lacking in hands-on application. A computer-based simulation program such as that tested by the authors may be one way to improve the effectiveness of C-arm training. In computer simulations of various scenarios commonly encountered in the operating room, trainees using the virtX program interact with three-dimensional models to test their knowledge base and improve their skill levels. Radiographs showing the simulated patient anatomy and surgical implants are “reconstructed” from data computed on the basis of the trainee s positioning of models of a C-arm, patient, and table, and are displayed in real time on the desktop monitor. Trainee performance is signaled in real time by color graphics in several control panels and, on completion of the exercise, is compared in detail with the performance of an expert operator. Testing of this computer-based training program in continuing medical education courses for operating room personnel showed an improvement in the overall understanding of underlying principles of intraoperative radiography performed with a C-arm, with resultant higher image quality, lower overall radiation exposure, and greater time efficiency. Supplemental material available at http://radiographics.rsna.org/lookup/suppl/doi:10.1148/rg.313105125/-/DC1.© RSNA, 2011
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Teistler, Michael

Abteilung/Einrichtung

CIVU – Center for Interaction, Visualization and Usability

Fachbereich

Fachbereich 3: Information und Kommunikation
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2011

Journal Article

Oliver Bott

Klaus Dresing

Markus Wagner

Björn-Werner Raab

Michael Teistler
Measuring and predicting software productivity: A systematic map and review

Petersen, K. . (2011). Measuring and predicting software productivity: A systematic map and review. Information and Software Technology, 53, 317–343.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2011

Journal Article

Kai Petersen
Improving students with rubric-based self-assessment and oral feedback

Barney, S. ., Khurum, M. ., Petersen, K. ., Unterkalmsteiner, M. ., & Jabangwe, R. . (2011). Improving students with rubric-based self-assessment and oral feedback. IEEE Transactions on Education, 55, 319–325.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2011

Journal Article

Sebastian Barney

Mahvish Khurum

Kai Petersen

Michael Unterkalmsteiner

Ronald Jabangwe

2010

Erste Richtlinie für den Weiterbetrieb von Windenergieanlagen veröffentlicht

Faber, P. D.-I. T. ., Hansen, K. ., & Klinke, L. . (2010). Erste Richtlinie für den Weiterbetrieb von Windenergieanlagen veröffentlicht. Erneuerbare Energien, 1. (Original work published Januar 2010)
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Faber, Torsten
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2010

Journal Article

Prof. Dr.-Ing. Torsten Faber

K. Hansen

L. Klinke
Implementing lean and agile software development in industry

Petersen, K. . (2010). Implementing lean and agile software development in industry. Blekinge Institute of Technology Doctoral Dissertation Series, 2010.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2010

Journal Article

Kai Petersen
Chemical interactions between marine macroalgae and bacteria

Goecke, F. R., Labes, A. ., Wiese, J. ., & Imhoff, J. F. (2010). Chemical interactions between marine macroalgae and bacteria. Marine Ecology Progress Series, 409, 267–299. Abgerufen von http://oceanrep.geomar.de/8734/

Abstract

We review research from the last 40 yr on macroalgal?bacterial interactions. Marine macroalgae have been challenged throughout their evolution by microorganisms and have developed in a world of microbes. Therefore, it is not surprising that a complex array of interactions has evolved between macroalgae and bacteria which basically depends on chemical interactions of various kinds. Bacteria specifically associate with particular macroalgal species and even to certain parts of the algal body. Although the mechanisms of this specificity have not yet been fully elucidated, ecological functions have been demonstrated for some of the associations. Though some of the chemical response mechanisms can be clearly attributed to either the alga or to its epibiont, in many cases the producers as well as the mechanisms triggering the biosynthesis of the biologically active compounds remain ambiguous. Positive macroalgal?bacterial interactions include phytohormone production, morphogenesis of macroalgae triggered by bacterial products, specific antibiotic activities affecting epibionts and elicitation of oxidative burst mechanisms. Some bacteria are able to prevent biofouling or pathogen invasion, or extend the defense mechanisms of the macroalgae itself. Deleterious macroalgal?bacterial interactions induce or generate algal diseases. To inhibit settlement, growth and biofilm formation by bacteria, macroalgae influence bacterial metabolism and quorum sensing, and produce antibiotic compounds. There is a strong need to investigate the bacterial communities living on different coexisting macroalgae using new technologies, but also to investigate the production, localization and secretion of the biological active metabolites involved in those possible ecological interactions.
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2010

Journal Article

Franz Goecke

Antje Labes

Jutta Wiese

Johannes Imhoff

Microbiology

Marine microoganisms

Defense

Beneficial communication

Biofilms

Oxidative burst

Antibiotic activity

Quorum sensing control

GREEN-ALGA ULVA

GRACILARIA-CONFERTA RHODOPHYTA

MAKONBU LAMINARIA-JAPONICA

ICE-ICE DISEASE

KAPPAPHYCUS-ALVAREZII GIGARTINALES

PRIONITIS-LANCEOLATA RHODOPHYTA

SEAWEED SECONDARY METABOLITES

CHONDRUS-CRISPUS RHODOPHYTA

CROSS-SPECIES INDUCTION

GRAM-NEGATIVE BACTERIA
Comprehensive Investigation of Marine Actinobacteria Associated with the Sponge Halichondria panicea

Schneemann, I. ., Nagel, K. ., Kajahn, I. ., Labes, A. ., Wiese, J. ., & Imhoff, J. F. (2010). Comprehensive Investigation of Marine Actinobacteria Associated with the Sponge Halichondria panicea. Applied and Environmental Microbiology, 76, 3702–3714. Abgerufen von http://oceanrep.geomar.de/8488/

Abstract

Representatives of Actinobacteria were isolated from the marine sponge Halichondria panicea collected from the Baltic Sea (Germany). For the first time, a comprehensive investigation was performed with regard to phylogenetic strain identification, secondary metabolite profiling, bioactivity determination, and genetic exploration of biosynthetic genes, especially concerning the relationships of the abundance of biosynthesis gene fragments to the number and diversity of produced secondary metabolites. All strains were phylogenetically identified by 16S rRNA gene sequence analyses and were found to belong to the genera Actinoalloteichus, Micrococcus, Micromonospora, Nocardiopsis, and Streptomyces. Secondary metabolite profiles of 46 actinobacterial strains were evaluated, 122 different substances were identified, and 88 so far unidentified compounds were detected. The extracts from most of the cultures showed biological activities. In addition, the presence of biosynthesis genes encoding polyketide synthases (PKSs) and nonribosomal peptide synthetases (NRPSs) in 30 strains was established. It was shown that strains in which either PKS or NRPS genes were identified produced a significantly higher number of metabolites and exhibited a larger number of unidentified, possibly new metabolites than other strains. Therefore, the presence of PKS and NRPS genes is a good indicator for the selection of strains to isolate new natural products.
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2010

Journal Article

Imke Schneemann

Kerstin Nagel

Inga Kajahn

Antje Labes

Jutta Wiese

Johannes Imhoff

Microbiology

Biology

BIOSYNTHESIS GENE-CLUSTER

COMPLETE GENOME SEQUENCE

STREPTOMYCES SP

BIOLOGICAL PROPERTIES

POLYKETIDE SYNTHASE

NATURAL-PRODUCTS

PSEUDOCERATINA-CLAVATA

ANTIMYCIN ANTIBIOTICS

STRUCTURE ELUCIDATION

CHONDRILLA-NUCULA
The effect of moving from a plan-driven to an incremental software development approach with agile practices

Petersen, K. ., & Wohlin, C. . (2010). The effect of moving from a plan-driven to an incremental software development approach with agile practices. Empirical Software Engineering, 15, 654–693.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2010

Journal Article

Kai Petersen

Claes Wohlin
Software process improvement through the Lean Measurement (SPI-LEAM) method

Petersen, K. ., & Wohlin, C. . (2010). Software process improvement through the Lean Measurement (SPI-LEAM) method. Journal of Systems and Software, 83, 1275–1287.
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Petersen, Kai

Abteilung/Einrichtung

FLAIR - Flensburg Artificial Intelligence Research
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2010

Journal Article

Kai Petersen

Claes Wohlin

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2011

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