@phdthesis{Li2024, author = {Li, Yunfei}, title = {On the influence of density and morphology on the Urban Heat Island intensity}, doi = {10.25932/publishup-62150}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-621504}, school = {Universit{\"a}t Potsdam}, pages = {xviii, 119}, year = {2024}, abstract = {The urban heat island (UHI) effect, describing an elevated temperature of urban areas compared with their natural surroundings, can expose urban dwellers to additional heat stress, especially during hot summer days. A comprehensive understanding of the UHI dynamics along with urbanization is of great importance to efficient heat stress mitigation strategies towards sustainable urban development. This is, however, still challenging due to the difficulties of isolating the influences of various contributing factors that interact with each other. In this work, I present a systematical and quantitative analysis of how urban intrinsic properties (e.g., urban size, density, and morphology) influence UHI intensity. To this end, we innovatively combine urban growth modelling and urban climate simulation to separate the influence of urban intrinsic factors from that of background climate, so as to focus on the impact of urbanization on the UHI effect. The urban climate model can create a laboratory environment which makes it possible to conduct controlled experiments to separate the influences from different driving factors, while the urban growth model provides detailed 3D structures that can be then parameterized into different urban development scenarios tailored for these experiments. The novelty in the methodology and experiment design leads to the following achievements of our work. First, we develop a stochastic gravitational urban growth model that can generate 3D structures varying in size, morphology, compactness, and density gradient. We compare various characteristics, like fractal dimensions (box-counting, area-perimeter scaling, area-population scaling, etc.), and radial gradient profiles of land use share and population density, against those of real-world cities from empirical studies. The model shows the capability of creating 3D structures resembling real-world cities. This model can generate 3D structure samples for controlled experiments to assess the influence of some urban intrinsic properties in question. [Chapter 2] With the generated 3D structures, we run several series of simulations with urban structures varying in properties like size, density and morphology, under the same weather conditions. Analyzing how the 2m air temperature based canopy layer urban heat island (CUHI) intensity varies in response to the changes of the considered urban factors, we find the CUHI intensity of a city is directly related to the built-up density and an amplifying effect that urban sites have on each other. We propose a Gravitational Urban Morphology (GUM) indicator to capture the neighbourhood warming effect. We build a regression model to estimate the CUHI intensity based on urban size, urban gross building volume, and the GUM indicator. Taking the Berlin area as an example, we show the regression model capable of predicting the CUHI intensity under various urban development scenarios. [Chapter 3] Based on the multi-annual average summer surface urban heat island (SUHI) intensity derived from Land surface temperature, we further study how urban intrinsic factors influence the SUHI effect of the 5,000 largest urban clusters in Europe. We find a similar 3D GUM indicator to be an effective predictor of the SUHI intensity of these European cities. Together with other urban factors (vegetation condition, elevation, water coverage), we build different multivariate linear regression models and a climate space based Geographically Weighted Regression (GWR) model that can better predict SUHI intensity. By investigating the roles background climate factors play in modulating the coefficients of the GWR model, we extend the multivariate linear model to a nonlinear one by integrating some climate parameters, such as the average of daily maximal temperature and latitude. This makes it applicable across a range of background climates. The nonlinear model outperforms linear models in SUHI assessment as it captures the interaction of urban factors and the background climate. [Chapter 4] Our work reiterates the essential roles of urban density and morphology in shaping the urban thermal environment. In contrast to many previous studies that link bigger cities with higher UHI intensity, we show that cities larger in the area do not necessarily experience a stronger UHI effect. In addition, the results extend our knowledge by demonstrating the influence of urban 3D morphology on the UHI effect. This underlines the importance of inspecting cities as a whole from the 3D perspective. While urban 3D morphology is an aggregated feature of small-scale urban elements, the influence it has on the city-scale UHI intensity cannot simply be scaled up from that of its neighbourhood-scale components. The spatial composition and configuration of urban elements both need to be captured when quantifying urban 3D morphology as nearby neighbourhoods also cast influences on each other. Our model serves as a useful UHI assessment tool for the quantitative comparison of urban intervention/development scenarios. It can support harnessing the capacity of UHI mitigation through optimizing urban morphology, with the potential of integrating climate change into heat mitigation strategies.}, language = {en} } @article{UygunClahsen2021, author = {Uygun, Serkan and Clahsen, Harald}, title = {Morphological processing in heritage speakers}, series = {Bilingualism : language and cognition}, volume = {24}, journal = {Bilingualism : language and cognition}, number = {3}, publisher = {Cambridge Univ. Press}, address = {Cambridge}, issn = {1366-7289}, doi = {10.1017/S1366728920000577}, pages = {415 -- 426}, year = {2021}, abstract = {Previous research has shown that heritage speakers struggle with inflectional morphology. 'Limitations of online resources' for processing a non-dominant language has been claimed as one possible reason for these difficulties. To date, however, there is very little experimental evidence on real-time language processing in heritage speakers. Here we report results from a masked priming experiment with 97 bilingual (Turkish/German) heritage speakers and a control group of 40 non-heritage speakers of Turkish examining regular and irregular forms of the Turkish aorist. We found that, for the regular aorist, heritage speakers use the same morphological decomposition mechanism ('affix stripping') as control speakers, whereas for processing irregularly inflected forms they exhibited more variability (i.e., less homogeneous performance) than the control group. Heritage speakers also demonstrated semantic priming effects. At a more general level, these results indicate that heritage speakers draw on multiple sources of information for recognizing morphologically complex words.}, language = {en} } @article{QiuZhangBicketal.2021, author = {Qiu, Liang and Zhang, Haoran and Bick, Thomas and Martin, Johannes and Wendler, Petra and B{\"o}ker, Alexander and Glebe, Ulrich and Xing, Chengfen}, title = {Construction of highly ordered glyco-inside nano-assemblies through RAFT dispersion polymerization of galactose-decorated monomer}, series = {Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker ; International edition}, volume = {60}, journal = {Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker ; International edition}, number = {20}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1433-7851}, doi = {10.1002/anie.202015692}, pages = {11098 -- 11103}, year = {2021}, abstract = {Glyco-assemblies derived from amphiphilic sugar-decorated block copolymers (ASBCs) have emerged prominently due to their wide application, for example, in biomedicine and as drug carriers. However, to efficiently construct these glyco-assemblies is still a challenge. Herein, we report an efficient technology for the synthesis of glyco-inside nano-assemblies by utilizing RAFT polymerization of a galactose-decorated methacrylate for polymerization-induced self-assembly (PISA). Using this approach, a series of highly ordered glyco-inside nano-assemblies containing intermediate morphologies were fabricated by adjusting the length of the hydrophobic glycoblock and the polymerization solids content. A specific morphology of complex vesicles was captured during the PISA process and the formation mechanism is explained by the morphology of its precursor and intermediate. Thus, this method establishes a powerful route to fabricate glyco-assemblies with tunable morphologies and variable sizes, which is significant to enable the large-scale fabrication and wide application of glyco-assemblies.}, language = {en} } @article{Farhy2020, author = {Farhy, Yael}, title = {Morphological generalization of Hebrew verb classes}, series = {The mental lexicon}, volume = {15}, journal = {The mental lexicon}, number = {2}, publisher = {John Benjamins Publishing Co.}, address = {Amsterdam}, issn = {1871-1340}, doi = {10.1075/ml.19001.far}, pages = {223 -- 257}, year = {2020}, abstract = {The present work investigated how morphological generalization, namely the way speakers extend their knowledge to novel complex words, is influenced by sources of variability in language and speaker properties. For this purpose, the study focused on a Semitic language (Hebrew), characterized by unique non-concatenative morphology, and native ( L1) as well as non-native (L2) speakers. Two elicited production tasks tested what information sources speakers employ in verbal inflectional class generalization, i.e., in forming complex novel verbs. Phonological similarity was tested in Experiment 1 and argument structure in Experiment 2. The analysis focused on the two most common Hebrew inflectional classes, Paal and Piel, which also constituted the vast majority of responses in the two tasks. Unlike the commonly found outcomes in Romance inflectional class generalization, the results yielded, solely for Piel, a graded phonological similarity effect and a robust argument structure effect, i.e., more Piel responses in a direct object context than without. The L2 pattern partially differed from the L1: (i) argument structure effect for L2 speakers was weaker, and (ii) L2 speakers produced more Paal than Piel responses. The results are discussed within the framework of rule-based and input-based accounts.}, language = {en} } @article{ClahsenJessen2020, author = {Clahsen, Harald and Jessen, Anna}, title = {Variability and its limits in bilingual word recognition}, series = {The mental lexicon}, volume = {15}, journal = {The mental lexicon}, number = {2}, publisher = {John Benjamins Publishing Co.}, address = {Amsterdam}, issn = {1871-1340}, doi = {10.1075/ml.20013.cla}, pages = {295 -- 329}, year = {2020}, abstract = {This study examines the processing of morphologically complex words focusing on how morphological (in addition to orthographic and semantic) factors affect bilingual word recognition. We report findings from a large experimental study with groups of bilingual (Turkish/German) speakers using the visual masked-priming technique. We found morphologically mediated effects on the response speed and the inter-individual variability within the bilingual participant group. We conclude that the grammar (qua morphological parsing) not only enhances speed of processing in bilingual language processing but also yields more uniform performance and thereby constrains variability within a group of otherwise heterogeneous individuals.}, language = {en} } @phdthesis{Ciaccio2020, author = {Ciaccio, Laura Anna}, title = {Prefixed words in morphological processing and morphological impairments}, doi = {10.25932/publishup-48465}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-484651}, school = {Universit{\"a}t Potsdam}, pages = {x, 276}, year = {2020}, abstract = {In recent years, a substantial number of psycholinguistic studies and of studies on acquired language impairments have investigated the case of morphologically complex words. These have provided evidence for what is known as 'morphological decomposition', i.e. a mechanism that decomposes complex words into their constituent morphemes during online processing. This is believed to be a fundamental, possibly universal mechanism of morphological processing, operating irrespective of a word's specific properties. However, current accounts of morphological decomposition are mostly based on evidence from suffixed words and compound words, while prefixed words have been comparably neglected. At the same time, it has been consistently observed that, across languages, prefixed words are less widespread than suffixed words. This cross-linguistic preference for suffixing morphology has been claimed to be grounded in language processing and language learning mechanisms. This would predict differences in how prefixed words are processed and therefore also affected in language impairments, challenging the predictions of the major accounts of morphological decomposition. Against this background, the present thesis aims at reducing the gap between the accounts of morphological decomposition and the accounts of the suffixing preference, by providing a thorough empirical investigation of prefixed words. Prefixed words are examined in three different domains: (i) visual word processing in native speakers; (ii) visual word processing in non-native speakers; (iii) acquired morphological impairments. The processing studies employ the masked priming paradigm, tapping into early stages of visual word recognition. Instead, the studies on morphological impairments investigate the errors produced in reading aloud tasks. As for native processing, the present work first focuses on derivation (Publication I), specifically investigating whether German prefixed derived words, both lexically restricted (e.g. inaktiv 'inactive') and unrestricted (e.g. unsauber 'unclean') can be efficiently decomposed. I then present a second study (Publication II) on a Bantu language, Setswana, which offers the unique opportunity of testing inflectional prefixes, and directly comparing priming with prefixed inflected primes (e.g. dikgeleke 'experts') to priming with prefixed derived primes (e.g. bokgeleke 'talent'). With regard to non-native processing (Publication I), the priming effects obtained from the lexically restricted and unrestricted prefixed derivations in native speakers are additionally compared to the priming effects obtained in a group of non-native speakers of German. Finally, in the two studies on acquired morphological impairments, the thesis investigates whether prefixed derived words yield different error patterns than suffixed derived words (Publication III and IV). For native speakers, the results show evidence for morphological decomposition of both types of prefixed words, i.e. lexically unrestricted and restricted derivations, as well as of prefixed inflected words. Furthermore, non-native speakers are also found to efficiently decompose prefixed derived words, with parallel results to the group of native speakers. I therefore conclude that, for the early stages of visual word recognition, the relative position of stem and affix in prefixed versus suffixed words does not affect how efficiently complex words are decomposed, either in native or in non-native processing. In the studies on acquired language impairments, instead, prefixes are consistently found to be more impaired than suffixes. This is explained in terms of a learnability disadvantage for prefixed words, which may cause weaker representations of the information encoded in affixes when these precede the stem (prefixes) as compared to when they follow it (suffixes). Based on the impairment profiles of the individual participants and on the nature of the task, this dissociation is assumed to emerge from later processing stages than those that are tapped into by masked priming. I therefore conclude that the different characteristics of prefixed and suffixed words do come into play at later processing stages, during which the lexical-semantic information contained in the different constituent morphemes is processed. The findings presented in the four manuscripts significantly contribute to our current understanding of the mechanisms involved in processing prefixed words. Crucially, the thesis constrains the processing disadvantage for prefixed words to later processing stages, thereby suggesting that theories trying to establish links between language universals and processing mechanisms should more carefully consider the different stages involved in language processing and what factors are relevant for each specific stage.}, language = {en} } @article{IzraylitGouldKratzetal.2020, author = {Izraylit, Victor and Gould, Oliver E. C. and Kratz, Karl and Lendlein, Andreas}, title = {Investigating the phase-morphology of PLLA-PCL multiblock copolymer/PDLA blends cross-linked using stereocomplexation}, series = {MRS advances}, volume = {5}, journal = {MRS advances}, number = {14-15}, publisher = {Cambridge Univ. Press}, address = {New York}, issn = {2059-8521}, doi = {10.1557/adv.2019.465}, pages = {699 -- 707}, year = {2020}, abstract = {The macroscale function of multicomponent polymeric materials is dependent on their phase-morphology. Here, we investigate the morphological structure of a multiblock copolymer consisting of poly(L-lactide) and poly(epsilon-caprolactone) segments (PLLA-PCL), physically cross-linked by stereocomplexation with a low molecular weight poly(D-lactide) oligomer (PDLA). The effects of blend composition and PLLA-PCL molecular structure on the morphology are elucidated by AFM, TEM and SAXS. We identify the formation of a lattice pattern, composed of PLA domains within a PCL matrix, with an average domain spacing d0 = 12 - 19 nm. The size of the PLA domains were found to be proportional to the block length of the PCL segment of the copolymer and inversely proportional to the PDLA content of the blend. Changing the PLLA-PCL / PDLA ratio caused a shift in the melt transition Tm attributed to the PLA stereocomplex crystallites, indicating partial amorphous phase dilution of the PLA and PCL components within the semicrystalline material. By elucidating the phase structure and thermal character of multifunctional PLLA-PCL / PDLA blends, we illustrate how composition affects the internal structure and thermal properties of multicomponent polymeric materials. This study should facilitate the more effective incorporation of a variety of polymeric structural units capable of stimuli responsive phase transitions, where an understanding the phase-morphology of each component will enable the production of multifunctional soft-actuators with enhanced performance.}, language = {en} } @article{ClahsenJessen2019, author = {Clahsen, Harald and Jessen, Anna}, title = {Do bilingual children lag behind? A study of morphological encoding using ERPs}, series = {Journal of child language}, volume = {46}, journal = {Journal of child language}, number = {5}, publisher = {Cambridge Univ. Press}, address = {New York}, issn = {0305-0009}, doi = {10.1017/S0305000919000321}, pages = {955 -- 979}, year = {2019}, abstract = {The current study investigates how bilingual children encode and produce morphologically complex words. We employed a silent-production-plus-delayed-vocalization paradigm in which event-related brain potentials (ERPs) were recorded during silent encoding of inflected words which were subsequently cued to be overtly produced. The bilingual children's spoken responses and their ERPs were compared to previous datasets from monolingual children on the same task. We found an enhanced negativity for regular relative to irregular forms during silent production in both bilingual children's languages, replicating the ERP effect previously obtained from monolingual children. Nevertheless, the bilingual children produced more morphological errors (viz. over-regularizations) than monolingual children. We conclude that mechanisms of morphological encoding (as measured by ERPs) are parallel for bilingual and monolingual children, and that the increased over-regularization rates are due to their reduced exposure to each of the two languages (relative to monolingual children).}, language = {en} } @article{Rauh2019, author = {Rauh, Gisa}, title = {Erinnerungen an die Gr{\"u}ndung des Instituts f{\"u}r Linguistik an der Universit{\"a}t Potsdam}, series = {Of trees and birds. A Festschrift for Gisbert Fanselow}, journal = {Of trees and birds. A Festschrift for Gisbert Fanselow}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-457-9}, doi = {10.25932/publishup-43320}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-433202}, pages = {415 -- 435}, year = {2019}, language = {de} } @article{Staudacher2019, author = {Staudacher, Peter}, title = {Plato on nature (φύσις) and convention (συνθήκη)}, series = {Of trees and birds. A Festschrift for Gisbert Fanselow}, journal = {Of trees and birds. A Festschrift for Gisbert Fanselow}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-457-9}, doi = {10.25932/publishup-43319}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-433193}, pages = {395 -- 411}, year = {2019}, language = {en} }