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Electrical bioimpedance spectroscopy is one way to study the electrical properties of biological matter. Different applications of electrical bioimpedance measurements have already been used in both research and clinical scenarios i.e. impedance plethysmography, total body water contents, etc. The electrical properties of tissue reflect the electrical characteristics of the constituent elements of the tissue and depend on its structure. Thus study of the electrical properties not only makes it possible to differentiate among tissues but also to determine the tissue condition. During hypoxia/ischemia the cell activates a certain chain of mechanisms of cellular adaptation in response to the insult. A consequence of these response mechanisms is that the biochemical composition of the cellular environment is altered and the cells swell (cellular edema). These alterations affect the electrical properties of tissue and the changes can be observed through measurement of the electrical bioimpedance of the affected tissue. Based on these ideas, this research work studies the effects of hypoxia/ischemia on the brain electrical impedance. The aim is to obtain the fundamental knowledge that may lead to the development of useful clinical tools for cerebral monitoring based on electrical bioimpedance spectroscopy. / QC 20120217 / Brain damage, Detection and localization of cell swelling

Der Vortrag 'Didaktik in digitalisierten Laboren und Werkstätten' im Rahmen der zweiwöchigen Veranstaltungsreihe 'Austausch digitale Lehre' der Hochschule Zittau/Görlitz (HSZG) beschreibt die möglichen Bereiche für eine Digitalisierung in Labor und Werkstatt nach dem Ebenenmodell von J.Franke und G. Wegner, 2022. Für jeden Bereich werden Herausforderungen für Lehrende aufgezeigt und anhand dieser eine Checkliste für Lehrende in digitalisierten Lehrszenarien entworfen.:I) Mein Hintergrund II) Ebenen der Digitalisierung III) Checkliste zu Vorüberlegungen

A recent focus of our Program for the Study of Infancy is the extent to which lab assistants retain fidelity when implementing experimental protocols. Dixon et al. showed that experimenters’ implementations of some aspects of standardized protocols can be influenced by infants’ temperaments. Ellefson and Oppenheimer further found that procedural deviations reduce effect sizes and lead to heterogeneity of findings. In this project, we evaluated archival videos involving experimenters’ implementations of two elicited imitation tasks, “Feed Bear” and “Make a Rattle.” In both tasks, experimenters were assumed to adhere to a narrative script and procedure, which included familiarizing infants with experimental stimuli for 60 seconds prior to infants engaging the tasks. Experimenters were also expected to adhere to a standardized narrative script that accompanied the modeling of “feeding the bear” or “making a rattle.” In this study we explored whether they did so, independent of infants' temperament characteristics. Ten experimenters guided sixty-one 15-month-olds through the experimental procedure. We examined two types of dependent measures reflecting 1) whether experimenters adhered to the 60 second familiarization time protocol, and 2) whether experimenters adhered to the standardized scripts. We also tracked experimenter infant-directed speech (IDS) before the model (prologue IDS) and after the model (epilogue IDS), to see if experimenters’ speech was potentially influenced by infant temperament. Infant temperament was measured by parent-report using the Early Childhood Behavior Questionnaire (ECBQ). For familiarization times in the Feed Bear task, experimenters granted significantly longer times to the infants than they were supposed to [M = 68.72, SD = 17.14; t(28) = 2.74, p = .011]. But there were no differences among the experimenters in familiarization time. For Make a Rattle, experimenters were on-target with their familiarization times (M = 67.64, SD = 21.38). Infant temperament was not associated with familiarization times in either task. In terms of IDS, experimenters used more words in the standardized narratives of both tasks than they were supposed to [M = 123.90, SD = 18.03; t(28) = 7.73, p M = 109.00, SD = 9.52; t(27) = 15.01, p < .001] respectively. There was no association between IDS during the narrative phase and infant temperament. However, there were associations between infant temperament and IDS during the prologue and epilogue phases; namely for effortful control (prologue r = .29, p p < .05), impulsivity (prologue r = .23, p p

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