| 1. |
- George, T. S., et al.
(author)
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Organic phosphorus in the terrestrial environment : a perspective on the state of the art and future priorities
- 2018
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In: Plant and Soil. - : Springer Netherlands. - 0032-079X .- 1573-5036. ; 427:1-2, s. 191-208
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Journal article (peer-reviewed)abstract
- Background: The dynamics of phosphorus (P) in the environment is important for regulating nutrient cycles in natural and managed ecosystems and an integral part in assessing biological resilience against environmental change. Organic P (P-o) compounds play key roles in biological and ecosystems function in the terrestrial environment being critical to cell function, growth and reproduction.Scope: We asked a group of experts to consider the global issues associated with P-o in the terrestrial environment, methodological strengths and weaknesses, benefits to be gained from understanding the P-o cycle, and to set priorities for P-o research.Conclusions: We identified seven key opportunities for P-o research including: the need for integrated, quality controlled and functionally based methodologies; assessment of stoichiometry with other elements in organic matter; understanding the dynamics of P-o in natural and managed systems; the role of microorganisms in controlling P-o cycles; the implications of nanoparticles in the environment and the need for better modelling and communication of the research. Each priority is discussed and a statement of intent for the P-o research community is made that highlights there are key contributions to be made toward understanding biogeochemical cycles, dynamics and function of natural ecosystems and the management of agricultural systems.
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| 2. |
- Gao, Man, et al.
(author)
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Intra- and Inter-syllabic Coordination : An Articulatory Study of Taiwanese and English
- 2011
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In: The 17th International Congress of Phonetic Sciences (ICPhS XVII). - Hong Kong : Wai-Sum Lee & Eric Zee. ; , s. 273-276
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Conference paper (peer-reviewed)abstract
- In this study the intra- and inter-gestural timing and coordination in English closed syllables and Taiwanese checked syllables is examined. Kinematic data elicited from a repetition task reveals that the vowel is co-articulated with the onset and coda consonants to a greater extent in Taiwanese checked syllables than English closed syllables; for Taiwanese greater overlap is observed between the hetero-syllabic coda and onset consonants. The different gestural overlap patterns in Taiwanese and English are accounted for with reference to the language-specific gestural pattern.
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| 3. |
- Gao, Man, et al.
(author)
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A comparison of intra- and inter-syllabic coordination in repetitive speech of Taiwanese and English
- 2011
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In: Proceedings of The 9th International Seminar on Speech Production 2011. - Montreal, Canada. ; , s. 289-296
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Conference paper (peer-reviewed)abstract
- This study aims to compare English closed syllables and Taiwanese checked syllables regarding both 1) intra-syllabic coordination: the timing relations between onset and coda consonants within the syllable, and 2) inter-syllabic coordination: the temporal overlap between hetero-syllabic coda and following onset consonant. Tongue, lip and jaw movements of four speakers of Taiwanese and six speakers of American English were recorded by means of EMMA in a repetition task. Analyses of articulatory data suggest that Taiwanese checked syllables differ from English closed syllable in that: 1) Taiwanese displays much greater consonant-vowel co-articulation within a syllable than English; and 2) greater overlap is observed between hetero-syllabic consonants in Taiwanese. These different patterns will be discussed with respect to the gestural composition of coda consonant in Taiwanese and English, as well as the language specific regularities of gestural coordination.
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| 4. |
- Hsieh, F. F., et al.
(author)
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Speech Errors in Taiwanese : An EMMA Study
- 2011
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In: Proceedings of the 17th International Congress of Phonetic Sciences. - Hong Kong : Wai-Sum Lee & Eric Zee. ; , s. 894-897
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Conference paper (peer-reviewed)abstract
- Speech errors in Taiwanese are investigated by means of a speeded repetition task. Our results show that the intrusion bias is also attested for word pairs with mismatched onsets, whereas in the alternating coda condition, reduction errors are the most frequent error type. This cross-linguistic difference can be attributed to language-specific implementation of stop codas.
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| 5. |
- Merkl, Philipp, et al.
(author)
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Ultrafast transition between exciton phases in van der Waals heterostructures
- 2019
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In: Nature Materials. - : Springer Science and Business Media LLC. - 1476-4660 .- 1476-1122. ; 18:7, s. 691-696
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Journal article (other academic/artistic)abstract
- © 2019, The Author(s), under exclusive licence to Springer Nature Limited. Heterostructures of atomically thin van der Waals bonded monolayers have opened a unique platform to engineer Coulomb correlations, shaping excitonic1–3, Mott insulating4 or superconducting phases5,6. In transition metal dichalcogenide heterostructures7, electrons and holes residing in different monolayers can bind into spatially indirect excitons1,3,8–11 with a strong potential for optoelectronics11,12, valleytronics1,3,13, Bose condensation14, superfluidity14,15 and moiré-induced nanodot lattices16. Yet these ideas require a microscopic understanding of the formation, dissociation and thermalization dynamics of correlations including ultrafast phase transitions. Here we introduce a direct ultrafast access to Coulomb correlations between monolayers, where phase-locked mid-infrared pulses allow us to measure the binding energy of interlayer excitons in WSe2/WS2 hetero-bilayers by revealing a novel 1s–2p resonance, explained by a fully quantum mechanical model. Furthermore, we trace, with subcycle time resolution, the transformation of an exciton gas photogenerated in the WSe2 layer directly into interlayer excitons. Depending on the stacking angle, intra- and interlayer species coexist on picosecond scales and the 1s–2p resonance becomes renormalized. Our work provides a direct measurement of the binding energy of interlayer excitons and opens the possibility to trace and control correlations in novel artificial materials.
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