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1.
  • Fjeldsoe-Nielsen, H, et al. (författare)
  • Phenotypic and genotypic characterization of prolyliminopeptidase-negative Neisseria gonorrhoeae isolates in Denmark.
  • 2005
  • Ingår i: European Journal of Clinical Microbiology and Infectious Diseases. - : Springer Science and Business Media LLC. - 0934-9723 .- 1435-4373. ; 24:4, s. 280-283
  • Tidskriftsartikel (refereegranskat)abstract
    • In the study presented here 26 recent Danish clinical isolates of prolyliminopeptidase (PIP)-negative Neisseria gonorrhoeae were phenotypically and genotypically characterized to investigate whether one or more PIP-negative strains are circulating in the Danish community. The profiles of these isolates were compared with those of three isolates from a recent outbreak of PIP-negative N. gonorrhoeae infection in the UK. Twenty-five of the Danish isolates and all three UK isolates had similar antibiograms and were designated serovar IB-4. Genotypic characterization by pulsed-field gel electrophoresis, porB1b gene sequencing, and opa-typing revealed that these isolates were indistinguishable or closely related. The results indicate that at least one PIP-negative N. gonorrhoeae strain is currently circulating in the Danish community, and this strain is indistinguishable from the one that caused an outbreak in the UK.
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2.
  • Fjeldså, Jon, et al. (författare)
  • Introduction
  • 2020
  • Ingår i: <em>The Largest Avian Radiation</em>. - Barcelona : Lynx Edicions. - 9788416728336 ; , s. 11-13
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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3.
  • Guo, Zhiming, et al. (författare)
  • Rapid enrichment detection of patulin and alternariol in apple using surface enhanced Raman spectroscopy with coffee-ring effect
  • 2021
  • Ingår i: Lebensmittel-Wissenschaft + Technologie. - : Elsevier. - 0023-6438 .- 1096-1127. ; 152
  • Tidskriftsartikel (refereegranskat)abstract
    • Patulin (PAT) and alternariol (AOH) are the main mycotoxin contaminants in fruits and their products, which have great toxic effects on human body due to their teratogenicity and carcinogenicity. This study proposed a surface enhanced Raman spectroscopy (SERS) technology combining chemometrics and coffee-ring effect to build high-throughput label-free detection models for PAT and AOH. A stable coffee ring structure was built by optimizing the drying temperature and droplet volume. Comparing the partial least squares (PLS) models grounded on variables selection method, the best performance was obtained by using synergy interval (Si) and genetic algorithm (GA) for PAT (R-c = 0.9905, R-p = 0.9759) and AOH (R-c = 0.9829, R-p = 0.9808), respectively. The limits of detection (LOD) for PAT and AOH were as low as 1 mu g L-1, and the recovery rates were 92.80%-114.83% with relative standard deviation (RSD) = 4.86 for PAT and 82.06%-108.13% with RSD <= 2.28% for AOH. The SERS technology combined with chemometrics and coffee-ring effect holds promise for high-throughput label-free detection of PAT and AOH in fruits and their products.
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4.
  • Guo, Zhan, et al. (författare)
  • Reduced complexity Schnorr-Euchner decoding algorithms for MIMO systems
  • 2004
  • Ingår i: IEEE Communications Letters. - 1089-7798. ; 8:5, s. 286-288
  • Tidskriftsartikel (refereegranskat)abstract
    • A new reduced-complexity Schnorr-Euchner decoding algorithm is proposed in this letter for uncoded multi-input multi-output systems, with q-QAM (q = 4, 16....) modulation. Furthermore, a Fano-like metric bias is introduced to the algorithm from the perspective of sequential decoding, as well as an early termination technique. Simulation results show that these modifications reduce the algorithm complexity efficiently, with only a small degradation in bit error rate at high signal to noise ratios.
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5.
  • Waldmann, Christian (författare)
  • Paths in L1 acquisition of verb second in Swedish children : On the role of input and frequency
  • 2009
  • Ingår i: Generative Approaches to Language Acquisition (GALA), Lisbon, September 11, 2009.
  • Konferensbidrag (refereegranskat)abstract
    • This presentation deals with similarities and differences in L1 acquisition of verb second (V2) among Swedish children. In Swedish, V2 means that the finite verb must be the second constituent in main clauses (1). In subordinate clauses, however, the finite verb occurs in a lower position, following sentence negation (2).(1) a. Igår          ville       Per inte   handla   julklappar.         yesterday  wanted  Per  not   shop      Christmas-gifts     b. *Igår        Per ville      inte handla julklappar.         yesterday Per  wanted not  shop   Christmas-gifts(2) …att  Per inte ville      handla julklappar        igår.       that Per not  wanted shop   Christmas-gifts yesterdayV2 in child language has been discussed thoroughly in the literature, linking it to issues such as verbal morphology, markedness and economy, verb semantics, finiteness and bilingualism (e.g. Jordens 1990, Clahsen & Penke 1992, Poeppel & Wexler 1993, Santelmann 1995, Platzack 1996, Bohnacker 1999), and to some extent to issues of input and frequency (e.g. Josefsson 2003, Westergaard 2006, Waldmann 2008). This study investigates the acquisition of V2 among 4 monolingual Swedish speaking children, focusing on their input as well as their production.As regards the input for V2, there are vast individual similarities, quantitatively and qualitatively. All 4 children are exposed to an equally large and stable amount of input for V2 during the investigated age period (1;6–3;0), a similar observation also reported for Norwegian children (Westergaard 2006). Lexically, the input for V2 is characterized to a great extent by the same finite verbs and initial constituents.Although exposed to a similar input for V2, not all 4 children acquire V2 alike. 3 children adhere to the general picture presented in previous studies, i.e. that V2 is applied consistently already in the earliest finite utterances and that finite verbs are rarely misplaced. A detailed study of one of the children reveals that her use of V2 does not seem to be limited to certain lexical items, not even in the earliest finite utterances.The fourth child, called Tea, makes abundant verb placement errors up to an age of 3;3, a period during which she applies V2 only sporadically. It is however argued that Tea’s early V2 consists of imitated chunks and that V2 is not applied systematically until just before 3;0. Moreover, it is argued that Tea does not misplace finite verbs randomly, but that her verb placement in main clauses develops systematically in 3 phases: from a low verbal position following sentence negation (V), as in subordinate clauses (see (2) above), via a verbal position in the middle of the clause (I), as in (1b) above, to the second position (C), as in (1a) above. The transition to V2 happens abruptly between 3;3 and 3;4.As regards the theoretical implications of my results, I discuss the role of input and frequency in acquisition, arguing that neither copying of input patterns based on frequency nor triggering parameters can capture Tea’s verb placement. Instead it seems that Tea formulates and evaluates different hypotheses, a strategy which allows children to take different paths in acquisition. Furthermore, I explore the relation between verb placement in subordinate clauses in the input and Tea’s deviating verb placement in main clauses.ReferencesBohnacker, Ute. 1999: Icelandic plus English: Language differentiation and functional categories in a successively bilingual child. Department of Linguistics and English Language, University of Durham, UK.Clahsen, Harald & Penke, Martina. 1992: "The acquisition of agreement morphology and its syntactic consequences: new evidence on German child language from the Simone-corpus." In Meisel, Jürgen M. (ed.), The acquisition of verb placement: functional categories and V2 phenomena in language acquisition, pp. 181-224. Dordrecht: Kluwer.Jordens, Peter. 1990: "The acquisition of verb placement in Dutch and German." In Linguistics, 28, pp. 1407-1448.Josefsson, Gunlög. 2003: "Input and output: sentence patterns in child and adult Swedish." In Josefsson, Gunlög, Platzack, Christer & Håkansson, Gisela (eds.), The acquisition of Swedish grammar, pp. 95-133. Amsterdam; Philadelphia: John Benjamins.Platzack, Christer. 1996: "The Initial Hypothesis of Syntax: A Minimalist Perspective on Language Acquisition and Attrition." In Clahsen, Harald (ed.), Generative Perspectives on Language Acquisition, pp. 369-414. Amsterdam; Philadelphia: John Benjamins.Poeppel, David & Wexler, Ken. 1993: "The Full Competence Hypothesis of Clause Structure in Early German." In Language, 69:1, pp. 1-33.Santelmann, Lynn Marie. 1995: The acquisition of Verb Second grammar in child Swedish: continuity of universal grammar in Wh-questions, topicalization and verb raising. Ann Arbor, Michigan: UMI.Waldmann, Christian. 2008: Input och output. Ordföljd i svenska barns huvudsatser och bisatser. PhD-thesis. Centre for Languages and Literature, Lund University.Westergaard, Marit R. 2006: "Triggering V2: The Amount of Input Needed for Parameter Setting in a Split-CP Model of Word Order." In Belletti, Adriana, Bennati, Elisa, Chesi, Cristiano, DiDomenico, Elisa & Ferrari, Ida (eds.), Language Acquisition and Development: Proceedings of GALA 2005, pp. 658-671. Cambridge: Cambridge Scholars Press.
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