Numerical modelling of dynamic ductile fracture propagation in different lab-scale experiments using GTN damage model

Initiation and propagation of ductile fractures are a major consideration during the design of high-pressure pipelines. Consequences of a pipeline failure can be catastrophic thus structural integrity must be ensured over several decades. Traditional lab-scale experiments such as the Charpy V-Notch (CVN) and Drop Weight Tear Test (DWTT), impact experiments on a notched three-point bending sample, are widely used to measure the fracture toughness of a material. However, with increasing wall thickness and the transition to high-grade steels in the pipeline industry, the size-effect of the specimen and inverse fracture became prominent issues. A new testing methodology called the Dynamic Tensile Tear Test (DT3) is currently investigated as to address the issues presented by the current state of the art. In this study, a numerical investigation is conducted on the CVN, DWTT and DT3 experiments to compare the modelling of dynamic ductile fracture propagation in three different testing scales using the Gurson-Tvergaard-Needleman (GTN) damage model. X70 and X100 pipeline steel grades are used to model material behaviour. For each considered lab-scale experiment, the dynamic ductile fracture behaviour was successfully reproduced using the GTN damage model

Intuitu fidelis servitii sui

In October 2012, Thérèse de Hemptinne retired after a successful academic career at the department of (medieval) History at Ghent University. Carrying on and strengthening the internationally recognized Ghent tradition of Auxiliary Sciences for the study of the Middle Ages, Thérèse de Hemptinne taught for many years the Bachelor’s and Master’s courses of Diplomatics and Palaeography. Following her research interests, which from the 1990s onward gradually expanded to focus on the position and role of women in a medieval man’s world, Thérèse de Hemptinne also integrated gender as a methodological tool of analysis into the Master’s courses ‘Historical Criticism’ and the ‘Gender Research Seminar’, and acted as a supervisor of many Master’s theses produced in the field of women and gender studies. The critical edition of the charters of the counts of Flanders Thierry and Philip of Alsace (1128-1191) can be considered one of the most important scholarly achievements of Thérèse de Hemptinne. Yet, her academic bibliography also testifies to her many other interests in medieval studies, among which political and institutional, social and cultural history of the Middle Ages, and particularly to her original gender-based approach to the discourse of medieval sources related to these areas. This volume is offered to Thérèse de Hemptinne by two of her students as a token of respect and gratitude for her services rendered and for her lifetime commitment to the department of (medieval) History as a teacher, as a senior researcher and scholar, as a mentor, as a colleague and as a friend. It contains the republication of a selection of Thérèse de Hemptinne’s most important and acclaimed articles and book chapters published during her academic career at Ghent University. The twenty one selected essays of Thérèse de Hemptinne are gathered around three themes: ‘Charters and Chanceries’, ‘Gender and Politics’, and ‘Women and Literacy’. Each chapter is introduced by an expert of international prominence

Political ideology and the rewriting of history in fifteenth-century Flanders

Medieval views on rulers from the past were often politically instrumentalised in the service of contemporary interests. In the recent historiography on medieval Flanders, the reconstruction of how 'historical truth' changed over time to cater for topical needs has primarily been examined from the perspective of 'social' or 'communicative' memories, which were orally transmitted over a short period of time. This line of research followed the dominant 'communicative memory' paradigm. However, historians have paid far less systematic attention to the question how urban elites and state officials used histories that went farther back in time and dealt with the 'high politics' of princes and rulers to assert (rebellious) political ideologies of the moment. In this vast topic of research, historians are dealing with histories that were transmitted through manuscripts and not through oral communication. Instead of relying on the 'communicative memory' - paradigm, which allows historians to consider how the recent past has been ideologically reconstructed, this article examines how late fifteenth-century Flemish urban elites rewrote, interpolated, deformed and manipulated histories from a more distant past to shape a functional 'cultural memory' (in the sense of Jan Assmann's definition) that influenced a society's ideological vision on history. Taking the political speech of Willem Zoete (1488) and the late fifteenth-century popular and widespread Flemish historiographical Middle Dutch corpus, the Excellente Cronike van Vlaenderen, as a starting point, this article shows how rulers from the past served as a vehicle to express contemporary rebellious ideas against the regency of Maximilian of Austria, and how ideological motives and discursive strategies were deployed to advocate the ideology of the 'political contract' between the prince and his subjects, as well as the idea of the 'natural prince'

Comparative analysis of language policy in Russia and in European and Asian countries (Belgium and Kazakhstan)

The article examines the language policy of several countries: Russia, Belgium

Cannabinoid modulation of limbic forebrain noradrenergic circuitry

Both the endocannabinoid and noradrenergic systems have been implicated in neuropsychiatric disorders. Importantly, low levels of norepinephrine are seen in patients with depression, and antagonism of the cannabinoid receptor type 1 (CB1R) is able to induce depressive symptoms in rodents and humans. Whether the interaction between the two systems is important for the regulation of these behaviors is not known. In the present study, adult male Sprague-Dawley rats were acutely or chronically administered the CB1R synthetic agonist WIN 55,212-2, and alpha2A and beta1 adrenergic receptors (AR) were quantified by Western blot. These AR have been shown to be altered in a number of psychiatric disorders and following antidepressant treatment. CB1R agonist treatment induced a differential decrease in alpha2A- and beta1-ARs in the nucleus accumbens (Acb). Moreover, to assess long-lasting changes induced by CB1R activation, some of the chronically treated rats were killed 7 days following the last injection. This revealed a persistent effect on alpha2A-AR levels. Furthermore, the localization of CB1R with respect to noradrenergic profiles was assessed in the Acb and in the nucleus of the solitary tract (NTS). Our results show a significant topographic distribution of CB1R and dopamine beta hydroxylase immunoreactivities (ir) in the Acb, with higher co-localization observed in the NTS. In the Acb, CB1R-ir was found in terminals forming either symmetric or asymmetric synapses. These results suggest that cannabinoids may modulate noradrenergic signaling in the Acb, directly by acting on noradrenergic neurons in the NTS or indirectly by modulating inhibitory and excitatory input in the Acb.This works was supported by PHS grant DA 020129. A.F.C. was supported by the Portuguese Foundation for Science and Technology (SFRH/BD/33236/2007)

La transmission de la culture et du traumatisme: analyse de l'expérience de trois familles ukrainiennes sur fond du conflit actuel

Les questions centrales investiguées dans ce mémoire sont : « Existe-t-il une transmission opérante de la culture et du traumatisme au travers des générations ? Si oui, comment se déroule-t-elle et quelles en sont les conséquences ? ». « Quel est le ressenti personnel de personnes immigrées en Belgique depuis X générations face au conflit se déroulant actuellement dans leur pays d’origine ? ». Pour ce faire, nous avons rencontré trois familles d’origine ukrainienne dont les grands-parents ont dû quitter leur pays pendant la Deuxième Guerre mondiale pour être enrôlés par les Allemands pour le travail forcé. Nous avons eu l’opportunité de nous entretenir à plusieurs reprises avec une personne de la première génération ainsi que trois personnes de la deuxième et deux de la troisième génération. Notre intention consistait à obtenir des récits concernant leur ressenti sur la transmission effective. Nous avons alors analysé ces témoignages selon les trois thèmes principaux de notre mémoire : la transmission culturelle, la transmission du traumatisme et enfin le ressenti suite au conflit ukrainien. Ces différentes parties ont été élaborées grâce à des critères théoriques choisies à partir d’une collecte de données issues de la littérature. Nous avons enfin tiré une série de conclusions qui mettent en tension les trois critères de recherche et le sentiment d’appartenance à l’Ukraine. En effet, nous avons remarqué que la transmission du traumatisme influe sur la transmission de la culture ainsi que sur le ressenti face au conflit ukrainien. Par ailleurs, la transmission culturelle joue sur le sentiment d’appartenance qui lui-même influence le ressenti par rapport à la problématique ukrainienne.Master [120] en sciences psychologiques, Université catholique de Louvain, 201