TY - GEN A1 - Benson, Lawrence A1 - Makait, Hendrik A1 - Rabl, Tilmann T1 - Viper BT - An Efficient Hybrid PMem-DRAM Key-Value Store T2 - Zweitveröffentlichungen der Universität Potsdam : Reihe der Digital Engineering Fakultät N2 - Key-value stores (KVSs) have found wide application in modern software systems. For persistence, their data resides in slow secondary storage, which requires KVSs to employ various techniques to increase their read and write performance from and to the underlying medium. Emerging persistent memory (PMem) technologies offer data persistence at close-to-DRAM speed, making them a promising alternative to classical disk-based storage. However, simply drop-in replacing existing storage with PMem does not yield good results, as block-based access behaves differently in PMem than on disk and ignores PMem's byte addressability, layout, and unique performance characteristics. In this paper, we propose three PMem-specific access patterns and implement them in a hybrid PMem-DRAM KVS called Viper. We employ a DRAM-based hash index and a PMem-aware storage layout to utilize the random-write speed of DRAM and efficient sequential-write performance PMem. Our evaluation shows that Viper significantly outperforms existing KVSs for core KVS operations while providing full data persistence. Moreover, Viper outperforms existing PMem-only, hybrid, and disk-based KVSs by 4-18x for write workloads, while matching or surpassing their get performance. T3 - Zweitveröffentlichungen der Universität Potsdam : Reihe der Digital Engineering Fakultät - 20 KW - memory Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-559664 SN - 2150-8097 IS - 9 ER - TY - JOUR A1 - Perrella, Giorgio A1 - Bäurle, Isabel A1 - van Zanten, Martijn T1 - Epigenetic regulation of thermomorphogenesis and heat stress tolerance JF - New phytologist : international journal of plant science N2 - Many environmental conditions fluctuate and organisms need to respond effectively. This is especially true for temperature cues that can change in minutes to seasons and often follow a diurnal rhythm. Plants cannot migrate and most cannot regulate their temperature. Therefore, a broad array of responses have evolved to deal with temperature cues from freezing to heat stress. A particular response to mildly elevated temperatures is called thermomorphogenesis, a suite of morphological adaptations that includes thermonasty, formation of thin leaves and elongation growth of petioles and hypocotyl. Thermomorphogenesis allows for optimal performance in suboptimal temperature conditions by enhancing the cooling capacity. When temperatures rise further, heat stress tolerance mechanisms can be induced that enable the plant to survive the stressful temperature, which typically comprises cellular protection mechanisms and memory thereof. Induction of thermomorphogenesis, heat stress tolerance and stress memory depend on gene expression regulation, governed by diverse epigenetic processes. In this Tansley review we update on the current knowledge of epigenetic regulation of heat stress tolerance and elevated temperature signalling and response, with a focus on thermomorphogenesis regulation and heat stress memory. In particular we highlight the emerging role of H3K4 methylation marks in diverse temperature signalling pathways. KW - chromatin remodelling KW - elevated temperature KW - epigenetics KW - heat stress KW - histone modification KW - memory KW - temperature response KW - thermomorphogenesis Y1 - 2022 U6 - https://doi.org/10.1111/nph.17970 SN - 0028-646X SN - 1469-8137 VL - 234 IS - 4 SP - 1144 EP - 1160 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Ventura-Bort, Carlos A1 - Wirkner, Janine A1 - Wendt, Julia A1 - Hamm, Alfons O. A1 - Weymar, Mathias T1 - Establishment of emotional memories is mediated by vagal nerve activation BT - evidence from noninvasive taVNS JF - The journal of neuroscience : the official journal of the Society for Neuroscience N2 - Emotional memories are better remembered than neutral ones, but the mechanisms leading to this memory bias are not well under-stood in humans yet. Based on animal research, it is suggested that the memory-enhancing effect of emotion is based on central nor-adrenergic release, which is triggered by afferent vagal nerve activation. To test the causal link between vagus nerve activation and emotional memory in humans, we applied continuous noninvasive transcutaneous auricular vagus nerve stimulation (taVNS) during exposure to emotional arousing and neutral scenes and tested subsequent, long-term recognition memory after 1 week. We found that taVNS, compared with sham, increased recollection-based memory performance for emotional, but not neutral, material. These findings were complemented by larger recollection-related brain potentials (parietal ERP Old/New effect) during retrieval of emotional scenes encoded under taVNS, compared with sham. Furthermore, brain potentials recorded during encoding also revealed that taVNS facilitated early attentional discrimination between emotional and neutral scenes. Extending animal research, our behavioral and neu-ral findings confirm a modulatory influence of the vagus nerve in emotional memory formation in humans. KW - emotion KW - ERPs KW - memory KW - Old KW - New effect KW - LPP KW - vagus nerve KW - tVNS Y1 - 2021 U6 - https://doi.org/10.1523/JNEUROSCI.2329-20.2021 SN - 1529-2401 VL - 41 IS - 36 SP - 7636 EP - 7648 PB - Society for Neuroscience CY - Washington, DC ER - TY - JOUR A1 - Benson, Lawrence A1 - Makait, Hendrik A1 - Rabl, Tilmann T1 - Viper BT - An Efficient Hybrid PMem-DRAM Key-Value Store JF - Proceedings of the VLDB Endowment N2 - Key-value stores (KVSs) have found wide application in modern software systems. For persistence, their data resides in slow secondary storage, which requires KVSs to employ various techniques to increase their read and write performance from and to the underlying medium. Emerging persistent memory (PMem) technologies offer data persistence at close-to-DRAM speed, making them a promising alternative to classical disk-based storage. However, simply drop-in replacing existing storage with PMem does not yield good results, as block-based access behaves differently in PMem than on disk and ignores PMem's byte addressability, layout, and unique performance characteristics. In this paper, we propose three PMem-specific access patterns and implement them in a hybrid PMem-DRAM KVS called Viper. We employ a DRAM-based hash index and a PMem-aware storage layout to utilize the random-write speed of DRAM and efficient sequential-write performance PMem. Our evaluation shows that Viper significantly outperforms existing KVSs for core KVS operations while providing full data persistence. Moreover, Viper outperforms existing PMem-only, hybrid, and disk-based KVSs by 4-18x for write workloads, while matching or surpassing their get performance. KW - memory Y1 - 2021 U6 - https://doi.org/10.14778/3461535.3461543 SN - 2150-8097 VL - 14 IS - 9 SP - 1544 EP - 1556 PB - Association for Computing Machinery CY - New York ER - TY - THES A1 - Ventura-Bort, Carlos T1 - Temporo-spatial dynamics of the impact of emotional contexts on visual processing and memory T1 - Zeitlich-räumliche Dynamik der Auswirkungen emotionaler Kontexte auf die visuelle Verarbeitung und das Gedächtnis N2 - It has frequently been observed that single emotional events are not only more efficiently processed, but also better remembered, and form longer-lasting memory traces than neutral material. However, when emotional information is perceived as a part of a complex event, such as in the context of or in relation to other events and/or source details, the modulatory effects of emotion are less clear. The present work aims to investigate how emotional, contextual source information modulates the initial encoding and subsequent long-term retrieval of associated neutral material (item memory) and contextual source details (contextual source memory). To do so, a two-task experiment was used, consisting of an incidental encoding task in which neutral objects were displayed over different contextual background scenes which varied in emotional content (unpleasant, pleasant, and neutral), and a delayed retrieval task (1 week), in which previously-encoded objects and new ones were presented. In a series of studies, behavioral indices (Studies 2, 3, and 5), event-related potentials (ERPs; Studies 1-4), and functional magnetic resonance imaging (Study 5) were used to investigate whether emotional contexts can rapidly tune the visual processing of associated neutral information (Study 1) and modulate long-term item memory (Study 2), how different recognition memory processes (familiarity vs. recollection) contribute to these emotion effects on item and contextual source memory (Study 3), whether the emotional effects of item memory can also be observed during spontaneous retrieval (Sstudy 4), and which brain regions underpin the modulatory effects of emotional contexts on item and contextual source memory (Study 5). In Study 1, it was observed that emotional contexts by means of emotional associative learning, can rapidly alter the processing of associated neutral information. Neutral items associated with emotional contexts (i.e. emotional associates) compared to neutral ones, showed enhanced perceptual and more elaborate processing after one single pairing, as indexed by larger amplitudes in the P100 and LPP components, respectively. Study 2 showed that emotional contexts produce longer-lasting memory effects, as evidenced by better item memory performance and larger ERP Old/New differences for emotional associates. In Study 3, a mnemonic differentiation was observed between item and contextual source memory which was modulated by emotion. Item memory was driven by familiarity, independently of emotional contexts during encoding, whereas contextual source memory was driven by recollection, and better for emotional material. As in Study 2, enhancing effects of emotional contexts for item memory were observed in ERPs associated with recollection processes. Likewise, for contextual source memory, a pronounced recollection-related ERP enhancement was observed for exclusively emotional contexts. Study 4 showed that the long-term recollection enhancement of emotional contexts on item memory can be observed even when retrieval is not explicitly attempted, as measured with ERPs, suggesting that the emotion enhancing effects on memory are not related to the task embedded during recognition, but to the motivational relevance of the triggering event. In Study 5, it was observed that enhancing effects of emotional contexts on item and contextual source memory involve stronger engagement of the brain's regions which are associated with memory recollection, including areas of the medial temporal lobe, posterior parietal cortex, and prefrontal cortex. Taken together, these findings suggest that emotional contexts rapidly modulate the initial processing of associated neutral information and the subsequent, long-term item and contextual source memories. The enhanced memory effects of emotional contexts are strongly supported by recollection rather than familiarity processes, and are shown to be triggered when retrieval is both explicitly and spontaneously attempted. These results provide new insights into the modulatory role of emotional information on the visual processing and the long-term recognition memory of complex events. The present findings are integrated into the current theoretical models and future ventures are discussed. N2 - Es wurde häufig beobachtet, dass einzelne emotionale Ereignisse effizienter verarbeitet und besser erinnert werden und länger anhaltende Gedächtnisspuren bilden als neutrales Material. Wenn jedoch emotionale Informationen als Teil eines komplexen Ereignisses wahrgenommen werden, wie beispielsweise im Kontext oder in Bezug auf andere Ereignisse und/oder Quellendetails, sind die modulierenden Einflüsse von Emotionen weniger klar. Die vorliegende Arbeit zielt darauf ab zu untersuchen, wie emotionale, kontextuelle Quelleninformationen die anfängliche Kodierung und den anschließenden langfristigen Abruf von zugehörigem neutralen Material (Itemgedächtnis) und kontextuellen Quellendetails (Quellengedächtnis) modulieren. Dazu wurde ein Zwei-Aufgaben-Experiment verwendet, bestehend aus einer nicht instruierten Enkodierungsaufgabe, bei der neutrale Objekte eingebettet in verschiedene kontextuelle Hintergrundszenen dargeboten wurden, die in ihrem emotionalen Inhalt variierten (unangenehm, angenehm und neutral), und einer verzögerten Abrufaufgabe (1 Woche), bei der zuvor enkodierte und neue Objekte präsentiert wurden. In einer Reihe von Studien wurden Verhaltensindizes (Studien 2-5), ereigniskorrelierte Potenziale (EKPs; Studien 1-4) und funktionelle Magnetresonanztomographie (Studie 5) verwendet, um zu untersuchen, ob emotionale Kontexte die visuelle Verarbeitung der zugehörigen neutralen Informationen kurzfristig verändern können (Studie 1) und das Langzeitgedächtnis modulieren (Studie 2), wie verschiedene Prozesse des Wiedererkennens (Vertrautheit vs. Rekollektion) zu diesen Emotionseffekten auf das Item- und das kontextuelle Quellengedächtnis beitragen (Studie 3), ob die emotionalen Effekte auf das Itemgedächtnis auch bei der spontanen Abfrage beobachtet werden können (Studie 4) und über welche Hirnregionen die modulierenden Effekte emotionaler Kontexte auf das Item- und kontextuelle Quellengedächtnis vermittelt werden (Studie 5). In Studie 1 wurde beobachtet, dass emotionale Kontexte durch emotionales assoziatives Lernen die Verarbeitung der zugehörigen neutralen Informationen kurzfristig verändern können. Neutrale Elemente, die mit emotionalen Kontexten verbunden sind (im Folgenden „emotional Assoziierte“ genannt), zeigten nach einer einzigen Paarung im Vergleich zu neutralen Elementen eine verbesserte perzeptuelle und elaboriertere Verarbeitung, wie durch höhere Amplituden in den P100- bzw. LPP-Komponenten nachgewiesen wurde. Studie 2 zeigte, dass emotionale Kontexte länger anhaltende Gedächtniseffekte erzeugen, was sich in einer besseren Itemgedächtnisleistung und größeren EKP-alt/neu Unterschieden für emotional Assoziierte zeigte. In Studie 3 wurde eine mnemonische Differenzierung zwischen Item- und kontextuellem Quellengedächtnis beobachtet, die durch Emotionen moduliert wurde. Das Itemgedächtnis wurde durch den Prozess der Vertrautheit getrieben unabhängig von den emotionalen Kontexten während der Enkodierung. Das kontextuelle Quellengedächtnis wurde dagegen durch Rekollektion getrieben und war besser für emotionales Material. Wie in Studie 2 wurden in EKPs, die mit Rekollektionsprozessen in Verbindung stehen, verstärkende Effekte von emotionalen Kontexten für das Itemgedächtnis beobachtet. Ebenso wurde für das kontextuelle Quellengedächtnis eine ausgeprägte Rekollektionsbezogene Potenzierung der EKPs ausschließlich für emotionale Kontexte beobachtet. Studie 4 zeigte, dass die langfristige Verstärkung der Rekollektion, die emotionale Kontexten im Itemgedächtnis verursachen, auch dann beobachtet werden kann, wenn der Abruf nicht explizit instruiert wird. Dieser Befund zum spontanen Erinnern deutet darauf hin, dass die gedächtnissteigernden Effekte von Emotionen nicht mit der Aufgabe zusammenhängen, die während des Abrufs gestellt wurde, sondern mit der motivationalen Relevanz des auslösenden Ereignisses. In Studie 5 wurde beobachtet, dass an der verstärkenden Wirkung von emotionalen Kontexten auf das Item- und kontextuelle Quellengedächtnis solche Hirnregionen beteiligt sind, die mit der Rekollektionsprozessen assoziiert werden, einschließlich der Bereiche des medialen Temporallappens, des posterioren parietalen Kortex und des präfrontalen Kortex. Zusammengenommen deuten diese Ergebnisse darauf hin, dass emotionale Kontexte die anfängliche Verarbeitung der zugehörigen neutralen Informationen und der nachfolgenden, langfristigen Erinnerungen an Items und kontextuelle Quellen schnell modulieren. Die durch emotionaler Kontexte ausgelösten Gedächtniseffekte werden eher durch Rekollektions- und weniger durch Vertrautheitsprozesse vermittelt und zeigen sich sowohl bei expliziten als auch bei spontanen Abruf. Diese Ergebnisse liefern neue Erkenntnisse über die modulierende Rolle emotionaler Informationen bei der visuellen Verarbeitung und der Langzeiterinnerung an komplexe Ereignisse. Die vorliegenden Erkenntnisse werden in aktuelle theoretische Modelle integriert und zukünftige Forschungsperspektiven werden diskutiert. KW - memory KW - fMRI KW - Emotion KW - emotion KW - EEG KW - Gedächtnis KW - EEG KW - fMRT Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-550236 ER - TY - JOUR A1 - Wirkner, Janine A1 - Ventura-Bort, Carlos A1 - Schulz, Paul A1 - Hamm, Alfons O. A1 - Weymar, Mathias T1 - Event-related potentials of emotional and neutral memories BT - the role of encoding position and delayed testing JF - Psychophysiology : journal of the Society for Psychophysiological Research N2 - Previous research found that memory is not only better for emotional information but also for neutral information that has been encoded in the context of an emotional event. In the present ERP study, we investigated two factors that may influence memory for neutral and emotional items: temporal proximity between emotional and neutral items during encoding, and retention interval (immediate vs. delayed). Forty-nine female participants incidentally encoded 36 unpleasant and 108 neutral pictures (36 neutral pictures preceded an unpleasant picture, 36 followed an unpleasant picture, and 36 neutral pictures were preceded and followed by neutral pictures) and participated in a recognition memory task either immediately (N=24) or 1 week (N=25) after encoding. Results showed better memory for emotional pictures relative to neutral pictures. In accordance, enhanced centroparietal old/new differences (500-900 ms) during recognition were observed for unpleasant compared to neutral pictures, most pronounced for the 1-week interval. Picture position effects, however, were only subtle. During encoding, late positive potentials for neutral pictures were slightly lower for neutral pictures following unpleasant ones, but only at trend level. To summarize, we could replicate and extend previous ERP findings showing that emotionally arousing events are better recollected than neutral events, particularly when memory is tested after longer retention intervals. Picture position during encoding, however, had only small effects on elaborative processing and no effects on memory retrieval. KW - attention KW - emotion KW - ERPs KW - memory KW - old KW - new effect KW - serial position effect Y1 - 2018 U6 - https://doi.org/10.1111/psyp.13069 SN - 0048-5772 SN - 1469-8986 VL - 55 IS - 7 PB - Wiley CY - Hoboken ER - TY - THES A1 - LeGall, Yann A1 - Mboro, Mnyaka Sururu T1 - Remembering the dismembered BT - African human remains and memory cultures in and after repatriation N2 - This thesis – written in co-authorship with Tanzanian activist Mnyaka Sururu Mboro – examines different cases of repatriation of ancestral remains to African countries and communities through the prism of postcolonial memory studies. It follows the theft and displacement of prominent ancestors from East and Southern Africa (Sarah Baartman, Dawid Stuurman, Mtwa Mkwawa, Songea Mbano, King Hintsa and the victims of the Ovaherero and Nama genocides) and argues that efforts made for the repatriation of their remains have contributed to a transnational remembrance of colonial violence. Drawing from cultural studies theories such as "multidirectional memory", "rehumanisation" and "necropolitics", the thesis argues for a new conceptualisation or "re-membrance" in repatriation, through processes of reunion, empowerment, story-telling and belonging. Besides, the afterlives of the dead ancestors, who stand at the centre of political debates on justice and reparations, remind of their past struggles against colonial oppression. They are therefore "memento vita", fostering counter-discourses that recognize them as people and stories. This manuscript is accompanied by a “(web)site of memory” where some of the research findings are made available to a wider audience. This blog also hosts important sound material which appears in the thesis as interventions by external contributors. Through QR codes, both the written and the digital version are linked with each other to problematize the idea of a written monograph and bring a polyphonic perspective to those diverse, yet connected, histories. N2 - Diese Studie untersucht Erinnerungskulturen während und nach der Rückführung menschlicher Überreste zu afrikanischen Gemeinschaften und Ländern. An der Schnittstelle von memory studies, postkolonialer Ethnographie und kritischer Museumsforschung zeigt diese Arbeit, wie die Rückführung von Überresten ehemaliger Widerstandskämpfer*innen und namenloser Vorfahren in ihre Gesellschaften gegen das Fortbestehen kolonialer Ungerechtigkeit angeht. In diesen Prozessen – von Rückgabeforderungen bis nach der Wiederbestattung der Überreste – intervenieren Nachfahren von Opfern, community leaders, Künstler*innen und Medien. Sie ermöglichen dadurch eine transnationale Auseinandersetzung mit der Geschichte der antikolonialen Bewegungen und der Rassenanthropologie. Durch Methoden der partizipativen Ethnographie zeigt die Arbeit auf, wie Überlieferung, Gedenkstätten, lokale Kulturprojekte, Theater, Film und Reportagen die Tatorte erneut aufgreifen und die zuvor von der Anthropologie objektifizierten Überreste „rehumanisieren“ (Rassool), mit anderen Worten, ihnen ihre menschliche Würde zurückgeben. Doch auch die sog. „afterlives“ der Opfer, deren Überreste so lange in Museen und Universitätssammlungen lagen, haben zu wichtigen Diskussionen über postkoloniale Gerechtigkeit, Museumsethik und transnationale Erinnerung geführt. Sollen sie in Gewahrsam einer staatlichen Institution oder an einem von den Nachkommen der Opfer gewählten Ort begraben werden? Was bedeuten diese zurückgeführten Vorfahren in dem gegenwärtigen Kampf um Anerkennung kolonialer Gewalt und Genozids, aber auch um Entschuldigung und Wiedergutmachung? Und wie sind diese Rückgabeprozesse (auch „Repatriierung“ genannt) generell in Narrative der kolonialen Vergangenheit eingebettet, wie zu verstehen im Kontext ihrer körperlichen und diskursiven Gewalt? All diese Fragen werden hier in Fallstudien und von unterschiedlichen Perspektiven aufgegriffen: die Geschichte des Kopfs und des Zahns vom Mhehe antikolonialen Mtwa Mkwawa (Tansania); die Rückkehr von Sarah Baartman von Frankreich nach Südafrika; der Geist von Dawid Stuurman, der 2017 von Australien zurück nach Südafrika begleitet wurde; die verschiedene Repatriierungen von Ovaherero and Nama Ahnen von Deutschland nach Namibia zwischen 2011 und 2018; der Fall von Xhosa König Hintsa, dessen Kopf angeblich in Großbritannien verschleppt wurde; und die Abwesenheit vom Kopf des Ngoni Nduna Songea Mbano, der während des Majimaji Kriegs von den Deutschen ermordet wurde. Die Körper und Geister dieser Toten sind ein heterogener Korpus. Dennoch drehen sich alle Fallstudien dieser Arbeit um zwei entscheidende Fragen: Erstens, wer hat die Deutungshoheit über die Geschichte der kolonialen Gewalt? Welche Erinnerung der Totenbleibt? Zweitens, was sind angemessene Entschädigungen für Mord, Völkermord, koloniale Unterdrückung und Ausbeutung? Als Beitrag im Feld der memory studies argumentiert diese Arbeit für ein erweitertes Verständnis der „remembrance“ (übersetzt als Erinnerung aber auch „Zusammenbringen der Körperteile“). In diesen materiellen und immateriellen Prozessen, wird wiedervereint, was durch jahrzehntelange physische und epistemische Gewalt gebrochen, beschädigt oder getrennt wurde: einerseits Knochen, Zähne und Körper, und andererseits Familien wieder zu vereinen, Subjektpositionen zu reparieren, Würde wiederherzustellen und Ansprüche auf Selbstbestimmung und Selbsterzählung zu erheben. Die Arbeit zeigt, dass bilaterale und transnationale politische und kulturelle Projekte die Geschichten der Toten “multidirektional“ erzählen (Rothberg), nämlich in Beziehung zueinander. Sie untersucht auch, in welchen Kontexten die Vergangenheit nicht mehr als Last, sondern als Werkzeug zum Verständnis und zur Heilung der Wunden angesehen wird. Es sind Trittsteine für Wege der Versöhnung und mögliche Wiedergutmachung, die auf Trauer, Anerkennung und Sühne, aber auch Zusammenarbeit ausgerichtet sind. Dank Repatriierungen können Nachfahren und communities endlich eine Geschichte(n) erzählen, die auf mehr als nur Verlust und Abwesenheit aufbauen. Das Buch hat zwei Autoren und verschiedene Mitwirkende, die zusätzliche Perspektiven auf die Geschichten kolonialer Gewalt ermöglichen. Diese Polyphonie in der ethnographischen Arbeit bezieht sich auf Vincent Crapanzanos Technik der Juxtaposition und Alexander Weheliyes Argument für „fragmentarisches“ Schreiben. Da lokale Akteur*innen zu dieser Wissensproduktion beigetragen haben, zielt die Arbeit auch darauf ab, sie sichtbar zu machen. Das Wissen, das diese ethnographische Forschung generiert hat, soll auch weiterhin verfügbar sein und an diejenigen zurückgegeben werden, die diese Forschung überhaupt erst ermöglicht haben. Deswegen führen eingebettete QR-Codes zu den Audioquellen der vielfältigen Interventionen von Nachfahren und Gemeinschaftsmitgliedern. Diese Quellen sind Teil einer größeren Website, ein digitales Gegenstück zu dem Manuskript. Über die Website werden Kontexte kolonialer Gewalt öffentlich zugänglich gemacht. In dieser digitalen Ausstellung ist das Sprachregister an ein nicht-akademisches Publikum angepasst. Darüber hinaus bietet die Website Übersetzungen einiger Forschungsergebnisse in relevante afrikanische Sprachen an. KW - repatriation KW - colonialism KW - human remains KW - memory KW - Erinnerungskultur KW - Rückgabe KW - menschliche Überreste KW - Kolonialismus KW - Tanzania KW - South Africa KW - Namibia KW - genocide KW - skull KW - Schädel KW - Tansania KW - Südafrika KW - Namibia KW - Rothberg KW - Mbembe KW - postcolonial KW - decolonial KW - postkolonial KW - dekolonial KW - Erinnerung Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-508502 ER - TY - JOUR A1 - Friedrich, Thomas A1 - Faivre, Lea A1 - Bäurle-Lenhard, Isabel A1 - Schubert, Daniel T1 - Chromatin-based mechanisms of temperature memory in plants JF - Plant, cell & environment : cell physiology, whole-plant physiology, community physiology N2 - For successful growth and development, plants constantly have to gauge their environment. Plants are capable to monitor their current environmental conditions, and they are also able to integrate environmental conditions over time and store the information induced by the cues. In a developmental context, such an environmental memory is used to align developmental transitions with favourable environmental conditions. One temperature-related example of this is the transition to flowering after experiencing winter conditions, that is, vernalization. In the context of adaptation to stress, such an environmental memory is used to improve stress adaptation even when the stress cues are intermittent. A somatic stress memory has now been described for various stresses, including extreme temperatures, drought, and pathogen infection. At the molecular level, such a memory of the environment is often mediated by epigenetic and chromatin modifications. Histone modifications in particular play an important role. In this review, we will discuss and compare different types of temperature memory and the histone modifications, as well as the reader, writer, and eraser proteins involved. KW - chromatin KW - cold KW - epigenetics KW - heat KW - memory KW - nucleosome remodelling KW - polycomb KW - priming KW - trithorax Y1 - 2018 U6 - https://doi.org/10.1111/pce.13373 SN - 0140-7791 SN - 1365-3040 VL - 42 IS - 3 SP - 762 EP - 770 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Lewis, Simon T1 - Border Trouble: Ethnopolitics and Cosmopolitan Memory in Recent Polish Cinema JF - East European Politics and Societies: and Cultures N2 - The border shifts and population exchanges between Central and East European states agreed at the 1945 Potsdam Conference continue to reverberate in the culture and politics of those countries. Focusing on Poland, this article proposes the term “border trouble” to interpret the politicized split in memory that has run through Polish culture since the end of the Second World War. Border trouble is a form of cultural trauma that transcends binaries of perpetrator/victim and oppressor/oppressed; it is also a tool for analyzing the ways in which spatial imagination, memory, and identity interact in visual and literary narratives. A close analysis of four recent feature films demonstrates the emergence of a visual grammar of cosmopolitan memory and identity in relation to borderland spaces. Wojciech Smarzowski’s Róża (“Rose,” 2011) and Agnieszka Holland’s Pokot (“Spoor,” 2017) are both set in territories that were transferred from Germany to Poland in 1945. Wołyń (“Volhynia,” released internationally as “Hatred,” 2016) and W ciemności (“In Darkness,” 2011), also directed by Smarzowski and Holland respectively, are set in regions that were under Polish administration before the war but were transferred to Soviet Ukraine in 1945. All four productions break new ground in the memorialization of the post-war legacy in Poland. They deconstruct hitherto dominant discourses of simultaneity and ethnic homogeneity, engaging in Poland’s wars of symbols as a third voice: anti-nationalist, but also refusing to essentialize cosmopolitan identity. They show the evolution of border trouble in response to contemporary political and cultural developments. KW - cosmopolitanism KW - borderlands KW - memory KW - Agnieszka Holland KW - Wojciech Smarzowski Y1 - 2019 U6 - https://doi.org/10.1177/0888325418815248 SN - 0888-3254 SN - 1533-8371 VL - 33 IS - 2 SP - 522 EP - 549 PB - Sage Publ. CY - Thousand Oaks ER - TY - JOUR A1 - LeGall, Yann T1 - Songea Mbano and the ‘halfway dead’ of the Majimaji War (1905–7) in memory and theatre JF - Human Remains and Violence: an interdisciplinary journal N2 - Debates on the relevance of repatriation of indigenous human remains are water under the bridge today. Yet, a genuine will for dialogue to work through colonial violence is found lacking in the European public sphere. Looking at local remembrance of the Majimaji War (1905-07) in the south of Tanzania and a German-Tanzanian theatre production, this article demonstrates how the spectre of colonial headhunting stands at the heart of claims for repatriation and acknowledgement of this anti-colonial movement. The missing head of Ngoni leader Songea Mbano haunts the future of German-Tanzanian relations in culture and heritage. By staging the act of post-mortem dismemberment and foregrounding the perspective of descendants, the theatre production Maji Maji Flava offers an honest proposal for dealing with stories of sheer colonial violence in transnational memory. KW - colonialism KW - memory KW - tanzania KW - Deutsch Ostafrika KW - Theater KW - Kolonialismus KW - Erinnerungskultur Y1 - 2020 U6 - https://doi.org/10.7227/HRV.6.2.2 VL - 6 IS - 2 SP - 4 EP - 22 PB - University Press CY - Manchester ER - TY - JOUR A1 - Wirkner, Janine A1 - Weymar, Mathias A1 - Loew, Andreas A1 - Hamm, Carmen A1 - Struck, Anne-Marie A1 - Kirschbaum, Clemens A1 - Hamm, Alfons O. T1 - Cognitive functioning and emotion processing in breast cancer survivors and controls: An ERP pilot study JF - Psychophysiology : journal of the Society for Psychophysiological Research N2 - Diagnosis and treatment of breast cancer is a very emotionally aversive and stressful life event, which can lead to impaired cognitive functioning and mental health. Breast cancer survivors responding with repressive emotion regulation strategies often show less adaptive coping and adverse outcomes. We investigated cognitive functioning and neural correlates of emotion processing using ERPs. Self-report measures of depression, anxiety, and fatigue, as well as hair cortisol as an index of chronic stress, were assessed. Twenty breast cancer survivors (BCS) and 31 carefully matched healthy controls participated in the study. After neuropsychological testing and subjective assessments, participants viewed 30 neutral, 30 unpleasant, and 30 pleasant pictures, and ERPs were recorded. Recognition memory was tested 1 week later. BCS reported stronger complaints about cognitive impairments and more symptoms of depression, anxiety, and fatigue. Moreover, they showed elevated hair cortisol levels. Except for verbal memory, cognitive functioning was predominantly in the normative range. Recognition memory performance was decreased in cancer survivors, especially for emotional contents. In ERPs, survivors showed smaller late positive potential amplitudes for unpleasant pictures relative to controls in a later time window, which may indicate less elaborative processing of this material. Taken together, we found cognitive impairments in BCS in verbal memory, impaired emotional picture memory accuracy, and reduced neural activity when breast cancer survivors were confronted with unpleasant materials. Further studies and larger sample sizes, however, are needed to evaluate the relationship between altered emotion processing and reduced memory in BCS in order to develop new treatment strategies. KW - attention KW - breast cancer survivors KW - emotion KW - ERPs KW - memory KW - neuropsychology Y1 - 2017 U6 - https://doi.org/10.1111/psyp.12874 SN - 0048-5772 SN - 1469-8986 VL - 54 SP - 1209 EP - 1222 PB - Wiley CY - Hoboken ER - TY - GEN A1 - Bort, Carlos Ventura A1 - Hamm, Alfons O. A1 - Weymar, Mathias T1 - ENHANCED VOLUNTARY AND SPONTANEOUS MEMORY RETRIEVAL OF EMOTIONAL ASSOCIATES: AN ERP STUDY T2 - Psychophysiology : journal of the Society for Psychophysiological Research KW - memory KW - ERPs KW - old/new effect Y1 - 2017 SN - 0048-5772 SN - 1469-8986 VL - 54 SP - S129 EP - S129 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Hilker, Monika A1 - Schwachtje, Jens A1 - Baier, Margarete A1 - Balazadeh, Salma A1 - Bäurle, Isabel A1 - Geiselhardt, Sven A1 - Hincha, Dirk K. A1 - Kunze, Reinhard A1 - Mueller-Roeber, Bernd A1 - Rillig, Matthias G. A1 - Rolff, Jens A1 - Schmülling, Thomas A1 - Steppuhn, Anke A1 - van Dongen, Joost A1 - Whitcomb, Sarah J. A1 - Wurst, Susanne A1 - Zuther, Ellen A1 - Kopka, Joachim T1 - Priming and memory of stress responses in organisms lacking a nervous system JF - Biological reviews KW - priming KW - stress signalling KW - epigenetics KW - memory KW - fitness KW - stress tolerance KW - defence KW - bet hedging Y1 - 2016 U6 - https://doi.org/10.1111/brv.12215 SN - 1464-7931 SN - 1469-185X VL - 91 SP - 1118 EP - 1133 PB - Wiley-Blackwell CY - Hoboken ER - TY - GEN A1 - Eckstein, Lars T1 - Recollecting bones BT - the remains of German-Australian colonial entanglements T2 - Postcolonial Studies N2 - This article critically engages with the different politics of memory involved in debates over the restitution of Indigenous Australian ancestral remains stolen by colonial actors in the nineteenth and early twentieth centuries and brought to Berlin in the name of science. The debates crystallise how deeply divided German scientific discourses still are over the question of whether the historical and moral obligations of colonial injustice should be accepted or whether researchers should continue to profess scientific disinterest'. The debates also reveal an almost unanimous disavowal of Indigenous Australian knowledges and mnemonic conceptions across all camps. The bitter ironies of this disavowal become evident when Indigenous Australian quests for the remains of their ancestral dead lost in the limbo of German scientific collections are juxtaposed with white Australian (fictional) quests for the remains of Ludwig Leichhardt, lost in the Australian interior. T3 - Zweitveröffentlichungen der Universität Potsdam : Philosophische Reihe - 147 KW - memory KW - ancestral remains KW - museums and anthropological collections KW - restorative justice KW - indigenous knowledge KW - Ludwig Leichhardt Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-413654 ER - TY - GEN A1 - Paape, Dario L. J. F. A1 - Hemforth, Barbara A1 - Vasishth, Shravan T1 - Processing of ellipsis with garden-path antecedents in French and German BT - Evidence from eye tracking T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - In a self-paced reading study on German sluicing, Paape (Paape, 2016) found that reading times were shorter at the ellipsis site when the antecedent was a temporarily ambiguous garden-path structure. As a post-hoc explanation of this finding, Paape assumed that the antecedent’s memory representation was reactivated during syntactic reanalysis, making it easier to retrieve. In two eye tracking experiments, we subjected the reactivation hypothesis to further empirical scrutiny. Experiment 1, carried out in French, showed no evidence in favor in the reactivation hypothesis. Instead, results for one out of the three types of garden-path sentences that were tested suggest that subjects sometimes failed to resolve the temporary ambiguity in the antecedent clause, and subsequently failed to resolve the ellipsis. The results of Experiment 2, a conceptual replication of Paape’s (Paape, 2016) original study carried out in German, are compatible with the reactivation hypothesis, but leave open the possibility that the observed speedup for ambiguous antecedents may be due to occasional retrievals of an incorrect structure. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 452 KW - verb-phrase ellipsis KW - lingering misinterpretation KW - sentence comprehension KW - memory KW - ambiguities KW - activation KW - hypothesis KW - discourse KW - clauses Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-414062 IS - 452 ER - TY - JOUR A1 - Paape, Dario L. J. F. A1 - Hemforth, Barbara A1 - Vasishth, Shravan T1 - Processing of ellipsis with garden-path antecedents in French and German BT - Evidence from eye tracking JF - PLoS ONE N2 - In a self-paced reading study on German sluicing, Paape (Paape, 2016) found that reading times were shorter at the ellipsis site when the antecedent was a temporarily ambiguous garden-path structure. As a post-hoc explanation of this finding, Paape assumed that the antecedent’s memory representation was reactivated during syntactic reanalysis, making it easier to retrieve. In two eye tracking experiments, we subjected the reactivation hypothesis to further empirical scrutiny. Experiment 1, carried out in French, showed no evidence in favor in the reactivation hypothesis. Instead, results for one out of the three types of garden-path sentences that were tested suggest that subjects sometimes failed to resolve the temporary ambiguity in the antecedent clause, and subsequently failed to resolve the ellipsis. The results of Experiment 2, a conceptual replication of Paape’s (Paape, 2016) original study carried out in German, are compatible with the reactivation hypothesis, but leave open the possibility that the observed speedup for ambiguous antecedents may be due to occasional retrievals of an incorrect structure. KW - verb-phrase ellipsis KW - lingering misinterpretation KW - sentence comprehension KW - memory KW - ambiguities KW - activation KW - hypothesis KW - discourse KW - clauses Y1 - 2018 U6 - https://doi.org/10.1371/journal.pone.0198620 SN - 1932-6203 VL - 13 IS - 6 SP - 1 EP - 46 PB - PLOS CY - San Francisco ER - TY - JOUR A1 - Cesca, Simone A1 - Sen, Ali Tolga A1 - Dahm, Torsten T1 - Seismicity monitoring by cluster analysis of moment tensors JF - Geophysical journal international N2 - We suggest a new clustering approach to classify focal mechanisms from large moment tensor catalogues, with the purpose of automatically identify families of earthquakes with similar source geometry, recognize the orientation of most active faults, and detect temporal variations of the rupture processes. The approach differs in comparison to waveform similarity methods since clusters are detected even if they occur in large spatial distances. This approach is particularly helpful to analyse large moment tensor catalogues, as in microseismicity applications, where a manual analysis and classification is not feasible. A flexible algorithm is here proposed: it can handle different metrics, norms, and focal mechanism representations. In particular, the method can handle full moment tensor or constrained source model catalogues, for which different metrics are suggested. The method can account for variable uncertainties of different moment tensor components. We verify the method with synthetic catalogues. An application to real data from mining induced seismicity illustrates possible applications of the method and demonstrate the cluster detection and event classification performance with different moment tensor catalogues. Results proof that main earthquake source types occur on spatially separated faults, and that temporal changes in the number and characterization of focal mechanism clusters are detected. We suggest that moment tensor clustering can help assessing time dependent hazard in mines. KW - Persistence KW - memory KW - correlations KW - clustering KW - Earthquake source observations Y1 - 2014 U6 - https://doi.org/10.1093/gji/ggt492 SN - 0956-540X SN - 1365-246X VL - 196 IS - 3 SP - 1813 EP - 1826 PB - Oxford Univ. Press CY - Oxford ER - TY - THES A1 - Boide, Silvia T1 - Strategien der Gedächtnisreflexion bei der Inszenierung von Erinnerung in Literatur und bildender Kunst T1 - Representation and reflection of memory : strategies in literature and art N2 - Die Arbeit geht aus von der Annahme, dass Literatur und Malerei, obgleich sie ihren Darstellungsformen entsprechend unterschiedliche Werkzeuge oder Strategien nutzen, ähnliche Potentiale der Gedächtnisreflexion für den Rezipienten bereitstellen. Selbst wenn die Strategien zur Erlangung eines Potentials der Reflexion von Gedächtnis also an die jeweilige Disziplin gebunden sind, so können doch die reflektierten Aspekte ähnliche sein. Ziel dieser Arbeit ist es, zu zeigen, dass in Theorie und Praxis solche Überschneidungen auffindbar sind. Dabei sollen Literatur und bildende Kunst (hier: Malerei) als zwei von vielen möglichen Erinnerungsmedien und ihre Funktionen innerhalb eines kollektiven Gedächtnisses als solche dargestellt werden. Speziell befasst sich die Arbeit dann mit der Funktion der Reflexion des kollektiven Erinnerns als Wirkungspotential, das im Rezeptionsprozess aktualisiert werden kann. Verschiedene Strategien der Gedächtnisreflexion werden unterschieden und in den drei Anwendungsbeispielen analysiert. Die Arbeit fasst zunächst einige von den Studien Jan und Aleida Assmanns ausgehende narratologische Konzepte zur Erinnerungskultur zusammen, darunter die Ansätze von Astrid Erll und Birgit Neumann. Es kristalliert sich eine Unterscheidung von Gedächtnisbildung und Gedächtnisreflexion heraus. Genauer in den Blick genommen wird Astrid Erlls Modell einer „Rhetorik des kollektiven Gedächtnisses.“ Auf drei Textebenen, der Handlungsebene, der Textstruktur und der sprachlichen Ebene können Potentiale der Gedächtnisreflexion beschrieben werden. Anhand dieser Unterteilungen werden im Anwendungsteil dann zwei literarische Prosatexte der gegenwärtigen Erinnerungsliteratur in den Blick genommen. Beide Texte, sowohl Grass' Im Krebsgang als auch Timms Halbschatten weisen vielfältige Strategien der Gedächtnisreflexion auf, die sich aber in ihrer Schwerpunktbildung voneinander unterscheiden. Zudem wird die Methodik auf den Gemäldezyklus 18. Oktober 1977 des Malers Gerhard Richter angewandt. N2 - The thesis assumes that literature and painting provide similar potential for the reflection of memory to their audience, although they utilise different tools and strategies as appropriate for their modes of expression. Even if the strategies to create a potential for the reflection of memory are clearly dependent on the relevant discipline, the aspects reflected can be similar. It is the goal of this thesis to show that such overlap can be found in theory and practice. Literature and fine arts (here: painting) will be presented as two of numerous media of remembrance and their functions within a collective memory will be analysed. The thesis will focus on the function of the collective memory's reflection as a potential of the text which can stimulate a reaction in the process of reception. Different strategies for reflection of memory will be identified and analysed in three case studies. The thesis summaries several narratological concepts based on the cultural memory studies by Jan and Aleida Assman, including those of Astrid Erll and Birgit Neumann. The distinction between memory formation and reflection of memory is clarified. Astrid Erll's model of a “Rhetoric of the collective memory” is analysed in more detail, according to which potential for the reflection of memory can be described on three text levels: plot, structure and language. The case studies then apply an analysis based on the distinction between the three levels to two contemporary German examples of literature dealing with memory. Both texts, Grass's Im Krebsgang (English title: Crabwalk) and Timm's Halbschatten use a number of strategies for the reflection of memory, although the emphasis differs between the texts. The same methodology is applied to Gerhard Richter's painting cycle 18. Oktober 1977 (English title: October 18, 1977). KW - Gedächtnis KW - Reflexion KW - Erinnerung KW - Geschichte KW - memory KW - reflection KW - history Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-59807 ER - TY - GEN A1 - Kliegl, Reinhold T1 - Kognitive Plastizität und altersbedingte Grenzen am Beispiel des Erwerbs einer Gedächtnistechnik T1 - Cognitive plasticity and age-related limits illustrated for the acquisition of a mnemonic skill N2 - Die Bedeutung kognitiver Entwicklungskapazität (Plastizität) und ihrer altersabhängigen Grenzen für Theorien kognitiven Alters wird thematisiert. Für kognitive Basisprozesse wird erwartet, daß die durch Training umgesetzte Entwicklungskapazität älterer Menschen zwar ausreicht, die Ausgangsleistung junger Erwachsener zu übertreffen, daß aber aufgrund altersbedingter Grenzen der Entwicklungskapazität nur sehr wenige ältere Erwachsene das Leistungsniveau trainierter junger Erwachsener erreichen werden. Am Beispiel eines Gedächtnistrainingsprogrammes zur Erhöhung der Merkfähigkeit für Wortlisten werden zwei Forschungsstrategien vorgestellt: (a) das Training von sehr leistungsfähigen älteren Erwachsenen und (b) Längsschnitt-Einzelfall-Studien. Die experimentellen Befunde bestätigten die theoretischen Erwartungen. Zwar waren die Leistungen der besten älteren Erwachsenen etwa doppelt so hoch wie die untrainierter junger Erwachsener, aber die durch das Training aufgedeckten Altersverluste konnten auch in bis zu 75 weiteren Übungsstunden nicht behoben werden. N2 - The relevance of developmental reserve capacity (plasticity) and associated age-related limits for theories of cognitive aging is discussed. For basic cognitive mechanisms, older adults' developmental reserve capacity is expected to be sufficient to surpass young adults' baseline performance. Aging-related limits of this reserve, however, will allow only very few older adults to achieve levels of performance characteristic of trained young adults. Two research strategies (designed to engineer a mnemonic skill for serial recall of words) are described: (a) training of positively selected, mentally very fit older adults and (b) longitudinal single case studies. Experimental results were in agreement with the theoretical expectations. The best older adults scored about twice as high as untrained young adults but even with up to 75 additional experimental sessions the age difference generated by the cognitive intervention was not overcome. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - paper 154 KW - plasticity KW - reserve capacity KW - testing-the-limits KW - adult age differences KW - mnemonic skill KW - memory Y1 - 1989 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-40321 ER - TY - GEN A1 - Baltes, Paul B. A1 - Kliegl, Reinhold T1 - Lernen und Gedächtnis im Alter : über Plastizität und deren Grenzen T1 - Learning and memory in old age N2 - Gedächtnishöchstleistungen sind auch im Alter möglich. Dies konnte am Beispiel der »Methode der Orte« experimentell bestätigt werden. Hierbei hat sich gezeigt, daß das Gehirn über große kognitive Kapazitätsreserven verfügt. In einer speziellen Testmethode (»testing the limits«) zeigt sich aber im Hochleistungsbereich, trotz der grundsätzlichen Plastizität, ein altersbezogenes Nachlassen der Gedächtnismechanik. Offenbar gibt es biologische Grenzen in der Schnelligkeit der menschlichen Vorstellungskraft. Vielleicht gelingt es auf der Grundlage dieser Erkentnnis, einen zuverlässigen Markierungsindikator für das hirnphysiologische Altern zu finden. Daraus könnten sich auch neue Methoden zur Früherkennung von Demenzen ableiten lassen. N2 - A very high level of performance in memory is also possible in old age. This could be confirmed, for example, by experiments using the »method of loci«. It was shown that the human brain has available a large cognitive developmental reserve capacity. Nevertheless, a special method of assessment (»testing the limits«) revealed a robust age related decrease of memory mechanics at the high performance level despite this basic plasticity. Obviously, there are biologic limits of the speed of human imagination. Perhaps it will be possible to find a reliable marker of brainphysiologic aging based on this knowledge. Furthermore, new methods in early detection of dementias might be derived from the approach described. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - paper 150 KW - Lernen KW - Gedächtnis KW - Alter KW - Plastizität KW - Methode der Orte KW - Testing the limits KW - Demenz KW - Learning KW - memory KW - old age KW - plasticity KW - method of places KW - testing the limits KW - dementia Y1 - 1988 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-40277 ER -