@article{vonMoritz2012,
  author    = {von Moritz, Brescius},
  title     = {Connecting the new world},
  volume    = {XIII},
  number    = {25},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-62386},
  pages     = {11 -- 33},
  year      = {2012},
  abstract  = {This article explores the link between the profound technological transformations of the nineteenth century and the life and work of the Prussian scholar Alexander von Humboldt (1769-1859). It analyses how Humboldt sought to appropriate the revolutionary new communication and transportation technologies of the time in order to integrate the American continent into global networks of commercial, intellectual and material exchange. Recent scholarship on Humboldt's expedition to the New World (1799-1804) has claimed that his descriptions of tropical landscapes opened up South America to a range of 'transformative interventions' (Pratt) by European capitalists and investors. These studies, however, have not analysed the motivations underlying Humboldt's support for such intrusions into nature. Furthermore, they have not explored the role that such projects played in shaping Humboldt's understanding of the forces behind the progress of societies. To comprehend Humboldt's approval for human interventions in America's natural world, this study first explores the role that eighteenth-century theories of progress and the notion of geographical determinism played in shaping his conception of civilisational development. It will look at concrete examples of transformative interventions in the American hemisphere that were actively proposed by Humboldt and intended to overcome natural obstacles to human interaction. These were the use of steamships, electric telegraphy, railroads and large-scale canals that together enabled global trade and communication to occur at an unprecedented pace. All these contemporary innovations will be linked to the four motifs of nets, mobility, progress and acceleration, which were driving forces behind the 'transformation of the world' that took place in the course of the nineteenth century.},
  language  = {en}
}
@phdthesis{Hain2018,
  author    = {Hain, Gerrit},
  title     = {Onsets and dependencies of strenuous spine bending accelerations in drop landings},
  doi       = {10.25932/publishup-42746},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-427461},
  school      = {Universit{\"a}t Potsdam},
  pages     = {XVI, 118},
  year      = {2018},
  abstract  = {BACKGROUND: Physical activity involving high spinal load has been exposed to possess a crucial impact in the genesis of acute and chronic low back pain and disorder. Vigorous spinal loads are surmised in drop landings, for which strenuous bending loads were formerly evinced for the lower extremity structures. Thus far, clinical studies revealed that repetitive landing impacts can evoke benign structural adaptions or damage to the lumbar vertebrae. Though, causes for these observations are hitherto not conclusively evinced; since actual spinal load has to date not been experimentally documented. Moreover, it is yet undetermined how physiological activation of trunk musculature compensates for landing impact induced spinal loads, and to which extend trunk activity and spinal load are affected by landing demands and performer characteristics. AIMS of this study are 1. the localisation and quantification of spinal bending loads under various landing demands and 2. the identification of compensatory trunk muscular activity pattern, which potentially alleviate spinal load magnitudes. Three consecutive Hypotheses (H1 - H3) were hereto postulated: H1 posits that spinal bending loads in segregated motion planes can feasibly and reliably be evaluated from peak spine segmental angular accelerations. H2 furthermore assumes that vertical drop landings elicit highest spine bending load in sagittal flexion of the lumbar spine. Based on these verifications, a second study shall prove the successive hypothesis (H3) that diversified landing conditions, like performer's landing familiarity and gender, as an implementation of an instantaneous follow-up task, affect the emerging lumbar spinal bending load. Herein it is moreover surmised that lumbar spinal bending loads under distinct landing conditions are predominantly modulated by herewith disparately deployed conditioned pre-activations of trunk muscles. METHODS: To test the above arrayed hypothesis, two successive studies were carried out. In STUDY 1, 17 subjects were repetitively assessed performing various drop landings (heigth: 15, 30, 45, 60cm; unilateral, bilateral, blindfolded, catching a ball) in a test-retest-design. Herein individual peak angular accelerations [αMAX] were derived from three-dimensional motion data of four trunk-segments (upper thoracic, lower thoracic, lumbar, pelvis). αMAX was herein assessed in flexion, lateral flexion, and rotation of each spinal joint, formed by two adjacent segments. Reliability of αMAX within and between test-days was evaluated by CV\%, ICC 2.1, TRV\%, and Bland \& Altman Analysis (BIAS±LoA). Subsequently, peak flexion acceleration of the lumbo-pelvic joint [αFLEX[LS-PV]] was statistically compared to αMAX expressions of each other assessed spinal joint and motion plane (Mean ±SD, Independent Samples T-test). STUDY 2 deliberately assessed mere peak lumbo-pelvic flexion accelerations [αFLEX[LS-PV]] and electro-myographic trunk pre-activity prior to αFLEX[LS-PV] on 43 subjects performing varied landing tasks (height 45cm; with definite or indefinite predictability of a subsequent instant follow up jump). Subjects were contrasted with respect to their previous landing familiarity ( >1000 vs. <100 landings performed in the past 10 years) and gender. Differences of αFLEX[LS-PV] and muscular pre-activity between contrasted subject groups as between landing tasks were equally statistically tested by three-way mixed ANOVA with Post-hoc tests. Associations between αFLEX[LS-PV] and muscular pre-activity were factor-specifically assessed by Spearman's rank order correlation coefficient (rS). Complementarily, muscular pre-activity was subdivided by landing phases [DROP, IMPACT] and discretely assessed for phase specific associations to αFLEX[LS-PV]. Each muscular activity was moreover pairwise compared between DROP and IMPACT (Mean ±SD, Dependent Samples T-test). RESULTS: αMAX was presented with overall high variability within test-days (CV =36\%). Lowest intra-individual variability and highest reproducibility of αMAX between test-days was shown in flexion of the spine. αFLEX[LS-PV] showed largely consistent sig. higher magnitudes compared to αMAX presented in more cranial spinal joints and other motion planes. αFLEX[LS-PV] moreover gradually increased with escalations in landing heights. Landing unfamiliar subjects presented sig. higher αFLEX[LS-PV] in contrast to landing familiar ones (p=.016). M. Obliquus Int. with M. Transversus Abd. (66 ±32\%MVC) and M. Erector Spinae (47 ±15\%MVC) presented maredly highest activity in contrast to lowest activity of M. Rectus Abd. (10 ±4\%MVC). Landing unfamiliar subjects showed compared to landing familiar ones sig. higher activity of M. Obliquus Ext. (17 ±8\%MVC, 12 ±7\%MVC, p= .044). M. Obliquus Ext. and its co-contraction ratio with M. Erector Spinae moreover exhibited low but sig. positive correlations to αFLEX[LS-PV] (rs=.39, rs=.31). Each trunk muscule distributed larger shares of its activity to DROP, whereas peak activations of most muscles emerged in the proportionally shorter IMPACT phase. Commonly increased muscular pre-activation particularly at IMPACT was found in landings with a contrived follow up jump and in female subjects, whereby αFLEX[LS-PV] was hereof only marginally affected. DISCUSSION: Highest spine segmental angular accelerations in drop landings emerge in sagittal flexion of the lumbar spine. The compensatory stabilisation of the spine appears to be preponderantly provided by a dorso-ventral co-contraction of M. Obliquus Int., M. Transversus Abd. and M. Erector Spinae. Elevated pre-activity of M. Obliquuis Ext. supposably characterises poor landing experience, which might engender increased bending loads to the lumbar spine. A pervasive large variability of spinal angular accelerations measured across all landing types, suggests a multifarious utilisation of diverse mechanisms compensating for spinal impacts in landing performances. A standardised assessment and valid evaluation of landing evoked lumbar bending loads is hereof largley confined. CONCLUSION: Drop landings elicit most strenuous lumbo-pelvic flexion accelerations, which can be appraised as representatives for high energetic bending loads to the spine. Such entail the highest risk to overload the spinal tissue, when landing demands exceed the individual's landing skill. Previous landing experience and training appears to effectively improve muscular spine stabilisation pattern, diminishing spinal bending loads.},
  language  = {en}
}
@misc{Brachmann2007,
  type      = {Master Thesis},
  author    = {Brachmann, Sabine},
  title     = {Kommunikation im Eiltempo : zur Dynamik sozialer Beschleunigungsprozesse und medial initiierten Sprachwandels am Beispiel schriftbasierter Alltagskommunikation},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14547},
  school      = {Universit{\"a}t Potsdam},
  year      = {2007},
  abstract  = {Die moderne Kultur- und Sozialgeschichte l{\"a}sst sich - auf den Ebenen des Transports, der Informations{\"u}bertragung und der interpersonellen Kommunikation - als ein sich permanent steigernder Beschleunigungsprozess beschreiben. Insbesondere neuartige Medientechnologien verk{\"u}rzen die zeitlichen Intervalle der Kommunikation zunehmend. Es ist davon auszugehen, dass sich die dem Geschwindigkeitsimperativ unterliegenden neuen Kommunikationsbedingungen in sprachlichen Innovationen niederschlagen und diese wiederum Indikatoren f{\"u}r Sprachwandel sind. In der j{\"u}ngsten linguistischen Forschung wird allerdings vielfach die These ge{\"a}ußert, der Sprachgebrauch in den neuen Medien indiziere fundamentale Ver{\"a}nderungen der Schriftlichkeit und f{\"u}hre zu einem sprachlichen Verfall besonderen Ausmaßes. Diese These soll am Beispiel schriftbasierter Alltagskommunikation - vom Telegramm {\"u}ber den Brief und der Internetkommunikation bis hin zur SMS-Kommunikation - in medien-, kultur- und texthistorischen Zusammenh{\"a}ngen {\"u}berpr{\"u}ft werden. Es geht darum, die kulturhistorischen Modalit{\"a}ten der Medien- und Beschleunigungsgenese aufzudecken und spezifische mediale und kontextuelle Bedingungen sprachlicher Ver{\"a}nderungen herauszustellen.},
  language  = {de}
}
@misc{AndressvonBresciusEtteetal.2012,
  author    = {Andress, Reinhard and von Brescius, Moritz and Ette, Ottmar and Holl, Frank and Knobloch, Eberhard},
  title     = {HiN : Alexander von Humboldt im Netz = {\`A} propos Kehlmann},
  series = {HIN : Alexander von Humboldt im Netz ; international review for Humboldtian studies},
  volume    = {XIII},
  journal   = {HIN : Alexander von Humboldt im Netz ; international review for Humboldtian studies},
  number    = {25},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/hinvol13iss252012},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-62139},
  pages     = {81},
  year      = {2012},
  abstract  = {Inhalt: Andress, Reinhard: Ein kurzer Brief Humboldts an den Hofmarschall Moritz, Brescius von: Connecting the new world : nets, mobility and progress in the age of Alexander von Humboldt Ette, Ottmar: Alexander von Humboldt in Daniel Kehlmanns Welt Ette, Ottmar: De c{\´o}micos e hist{\´e}ricos : una r{\´e}plica a la s{\´a}tira sobre eruditos de Daniel Kehlmann Holl, Frank:"Die zweitgr{\"o}ßte Beleidigung des Menschen sei die Sklaverei ..." : Daniel Kehlmanns neu erfundener Alexander von Humboldt Knobloch, Eberhard: Alexander von Humboldt und Carl Friedrich Gauß : im Roman und in Wirklichkeit},
  language  = {de}
}