Nous considérons une chaîne de Su-Schrieffer-Heeger (SSH) à laquelle nous attachons une chaîne semi-infinie non dimérisée aux deux extrémités. Nous étudions l’effet d’un tel couplage sur les propriétés du modèle de SSH. En particulier, la représentation d’un tel système infini sous forme de système effectif fini nous permet d’examiner ses états de surface topologiques. Nous montrons que, comme ce à quoi on s’attendrait, les états de surface initiaux évoluent à mesure que le couplage entre les systèmes augmente. Alors que ce couplage augmente, deux phénomènes sont observés: d’un côté, ces états de surface disparaissent progressivement, et de l’autre côté, de nouveaux états de surface émergent. Ces nouveaux états, que nous appelons états fantômes, sont aussi des états de basse énergie. Une particularité surprenante de ceux-ci est qu’ils sont localisés sur une nouvelle interface: celle-ci est passée du premier (et dernier) site au deuxième (et avant-dernier) site, ce qui suggère que la topologie du système est fortement influencée par les chaînes semi-infinies. La topologie du système tripartite peut être classifiée selon trois régimes. Pour le régime de faible couplage, le système est dans une phase topologique bien définie; pour de grands couplages, il est dans sa phase opposée; pour le régime intermédiaire, sa nature topologique n’est pas encore bien comprise. / We consider a Su-Schrieffer-Heeger (SSH) chain to which we attach a semi-infinite undimerized chain (lead) to both ends. We study the effect of the openness of the SSH model on its properties. In particular, an accurate representation of the infinite system using an effective Hamiltonian allows us to examine its topological edge states. We show that, as one would expect, the initial edge states evolve as the coupling between the systems is increased. As this coupling grows, these states slowly vanish, while a new type of edge states emerge. These new states, which we refer to as ghost states, are also low-energy states. A surprising property of these states is that they are localized on a new interface: the interface has moved from the first (and last) site to the second (and second to last) site. This suggests that the topology of the system is strongly affected by the leads, with three regimes of behaviour. For very small coupling the system is in a well-defined topological phase; for very large coupling it is in the opposite phase; in the intermediate region, its topological nature is yet to be understood.

Le lymphome cutané primitif (LCP) CD30+ est une lymphoprolifération maligne de phénotype T. Son oncogenèse reste à ce jour inconnue. Le but de ma thèse est d'identifier des gènes exprimés spécifiquement dans les LCP CD30+ afin de comprendre les mécanismes d'oncogenèse et également d'identifier des marqueurs diagnostics ou thérapeutiques. Des banques d'ADNc soustraites sont réalisées par SSH « Suppressive Subtractive Hybridisation » entre des LCP CD30+ et des lymphocytes sanguins. Ces banques sont ensuite criblées par des techniques de Dot Blot avec des sondes radiomarquées spécifiques des échantillons étudiés. Les clones sélectionnés sont enfin validés par PCR en temps réel. Nous avons ainsi mis en évidence cinq gènes surexprimés dans les LCP CD30+ : THW, p120caténine, SPARC, PTTG1, CD30 et cinq gènes sousexprimés : humanine, CIN85, Bcl11B, CD30 L et CD30s. Il reste à vérifier si ces gènes sont responsables de l'oncogenèse ou s'ils sont uniquement des phénotypes des LCP CD30+.

Les symbioses eucaryotes/micro-organismes constituent une importante source d'innovation évolutive et de diversité écologique. Ces associations sont très répandues chez les insectes, en particulier chez les insectes parasitoïdes (insectes parasites d'autres insectes) qui hébergent en particulier une grande diversité de virus transmis verticalement. Leurs effets directs sur les parasitoïdes ainsi que les effets indirects sur la structure des communautés sont à l'heure actuelle mal compris. Nous avons abordé ces questions au travers l'étude d'un virus héritable (LbFV) ayant la particularité de manipuler le comportement de superparasitisme de son hôte, l'hyménoptère parasitoïde de drosophiles Leptopilina boulardi. La mise au point d'un outil moléculaire diagnostic de l'infection nous a permis de montrer que ce virus, spécifique à L. boulardi, peut atteindre de fortes prévalences dans les populations d'hôtes. Nous avons également mis en évidence un effet de la présence du virus sur les interactions compétitives interspécifiques au sein de la communauté des parasitoïdes de drosophiles. L'approche intégrée de ce travail constitue une étape importante dans la connaissance du rôle des virus héritables sur l'écologie et l'évolution de leurs hôtes

This study considers the relationship between an academic elite and its political socio-cultural context, in the case of ‘mizraḥanut’ in Israel. That is, a field, a network and a Hebrew discourse that produce knowledge about a vague conflation of the Middle East, Arabs, ‘Arabness,’ Islam, and ‘Islamness,’ an object that I call ‘the Arab/Muslim,’ and which mirrors the ethno-lingual-national-religious bind that Zionism advocates for Jews. Where other studies focus on either orientalist criticism or everyday academic capitalism, I argue that this field manifests an overdetermination of both ideologies, as it is poised at the junction of academia, orientalism and Zionism. The study looks at the way that the cultural import of ‘mizraḥanut’ in Jewish-Israeli society manifests through resourceful agencies of power-knowledge in and out of academia. At the same time, the field’s ties with, and dependency on, local and global (particularly American) academia are also significant to its discourse and praxis, and the trends there often pull in different political and philosophical directions. The academics in the field try to settle these potentially conflicting influences and work despite their tensions. The study draws on multiple scholarly traditions and offers new evidence for, and insights in, the various historical and cultural-discursive discussions with which it engages. From contributions to methodology and the different understandings of orientalism, through cultural-historical arguments about the origins and evolution of the local field and its colonial entanglements, to inferring the presupposed and the unsaid, this multi-layered anthropological study draws on, and develops the understanding of, broader political conditions, such as colonialism and neoliberalism.

Målet med detta projekt var att hjälpa IT-Mästaren att kunna fakturera sina kunder på ett smidigare sätt. Deras dåvarande lösning av kundernas dataanvändning var tidskrävande och ineffektivt, därför ville de automatisera systemet. Det nya systemet skulle användas för att administrera kundernas servrar med hjälp av ett grafiskt gränssnitt och sedan kontakta dem för att få fram olika värden för respektive kund som ska presenteras på IT-Mästarens hemsida. På så sätt skulle de kunna fakturera sina kunder på ett mer effektivt sätt och även få bättre överblick av kundernas användning.  I och med utvecklingen utav detta system så fördjupande jag mig dels i egna kända områden men jag lärde mig också nya kunskaper. Det gällde inte enbart teknisk utveckling utan också undersökning av exempelvis hämtningen av alla data som skulle göras. Jag använde utvalda metoder för att kunna utföra detta projekt på ett smidigt och bra sätt. Metoderna beskrivs i rapporten. / The goal of this project was that the IT-Mästaren wanted to be able to bill their customers in a more comfortable way. Their solution of the customer’s server usage of that time was time consuming and inefficient, therefore they wanted to automate the system. The new system should manage their customer’s servers by using a graphical interface and then contact them to get different values for each customer to be presented at the IT-Mästaren's website. In this way they could bill their customers more efficiently and get a better understanding of their customers’ use.  With the development of this system I immersed in my own known areas and I also learned new knowledge. It was not only about technical development but also investigationamong other thingslike retrieval of all the data that should be collected. I used selected methods in order to perform this project in a smooth and effective manner. The methods are described in the report.

Thesis deals with design of acquisition system, working on developing platform STEMLab (Red Pitaya). Goal is possibility of monitoring analog signals with adjustable sampling frequency and length of acquisition. Software was created for both controlling part (Python application) and for platform itself (embedded C, Python) using the appropriate FPGA-HW design (HDL). Thesis describe how to work with platform ecosystem, control and behaviour of aplications created during the proces of getting acquainted with the platform and options how aplications could be created.

This thesis deals with the design of hardware unit used for acceleration of the process of securing network traffic within Lawful Interception System developed as a part of Sec6Net project. First aim of the thesis is the analysis of available security mechanisms commonly used for securing network traffic. Based on this analysis, SSH protocol is chosen as the most suitable mechanism for the target system. Next, the thesis aims at introduction of possible variations of acceleration unit for SSH protocol. In addition, the thesis presents a detailed design description and implementation of the unit variation based on AES-GCM algorithm, which provides confidentiality, integrity and authentication of transmitted data. The implemented acceleration unit reaches maximum throughput of 2,4 Gbps.

In this thesis we explore in particular the dynamics of a special type of quasi-particle in pi-conjugated materials termed polaron, the origin of which is intimately related to the strong interactions between the electronic and the vibrational degrees of freedom within these systems. In order to conduct such studies with the particular focus of each appended paper, we simultaneously solve the time-dependent Schrödinger equation and the lattice equation of motion with a three-dimensional extension of the famous Su-Schrieffer-Heeger (SSH) model Hamiltonian. In particular, we demonstrate in Paper I the applicability of the method to model transport dynamics in molecular crystals in a region were neither band theory nor perturbative treatments such as the Holstein model and extended Marcus theory apply. In Paper II we expand the model Hamiltonian to treat the revolution of phenylene rings around the sigma-bonds and demonstrate the great impact of stochastic ring torsion on the intra-chain mobility in conjugated polymers using poly[phenylene vinylene] (PPV) as a model system. Finally, in Paper III we go beyond the original purpose of the methodology and utilize its great flexibility to study radiationless relaxations of hot excitons. / Report code: LiU-TEK-LIC-2007:4.

The occurrence of Boron (B) toxicity in Australian soils is recognised as a limiting factor for cereal productivity. A number of loci conferring tolerance to B toxicity have been identified in barley and chromosomally mapped. However, a lack of knowledge relating to the physiological and molecular events that occur under B toxicity and the molecular basis for B stress tolerance has been a bottleneck in harnessing available genetic diversity in barley and wheat. The recent advances in functional genomics provided an opportunity to examine B stress in barley in more detail. The aim of this project was to analyse genes differentially expressed under B stress in tolerant and intolerant barley to identify candidate genes involved in B toxicity tolerance. Two experimental approaches, Suppression Subtractive Hybridization (SSH) and microarray were adopted. Firstly, SSH was performed to examine gene expression in roots of selected tolerant and intolerant doubled haploid lines from a Clipper (B intolerant) X Sahara 3771 (B tolerant) mapping population, grown under moderate B stress. The SSH experiment aimed to investigate the early transcriptional response of B tolerant barley lines to B stress in order to identify the basis for B toxicity tolerance in roots. Differential screening of the subtracted library generated from B treated plants identified a total of 111 non-redundant clones up-regulated in bulked tolerant lines. On the other hand 94 clones were differentially expressed under non-treated conditions. Among the clones identified from subtracted library generated from B treated plants, metabolism was the largest functional category, representing 21% of the clones. The largest functional category in the subtracted library generated from non treated plants was cellular transport, representing 19% of the clones. Based on sequence similarity, about 170 transcripts identified in this experiment were assigned to chromosomal segments (bins) on the three homoeologous genomes of bread wheat. In total, 36 clones from the subtracted library generated from B treated plants were analysed as candidates. Nine were genetically mapped within the region of B tolerance QTL on three chromosomes (2H, 4H and 6H). The genes mapped to 4H and 6H QTL have the highest association with these loci in the Clipper X Sahara 3771 doubled haploid mapping population. A 4H B tolerance QTL candidate gene was identified as a B transporter gene with similarity to the Arabidopsis BOR1 gene. Genes identified to be differentially expressed in the tolerant lines from SSH suggest activation of a diverse defence response in the roots of barley plants under B stress. Data from SSH experiment indicate that cell wall-plasma membrane cytoskeleton continuum constitute the first action site against B toxicity and the influence of toxic B on K+ uptake could be the key initiating factor. In the second approach, the Affymetrix 22K Barley1 GeneChip(TM) was used to investigate B stress adaptation processes in barley. Gene expression was profiled in leaves of Sahara 3771 and Clipper plants grown under various B concentrations. The results show that the two genotypes respond differently to B toxicity. The B intolerance of Clipper is expressed through the induction of a high number of probe sets (2310) even at a low B concentration of 100 µM. In contrast, Sahara 3771 responded to a high B concentration (2000 µM) through the induction of only a few hundred (266) probe sets. In Sahara 3771 no change in the expression level of any probe sets was observed at 100 µM B. Altogether 286 probe sets showed differential expression in Sahara 3771 under three levels of B treatment (500, 1000 and 2000 µM). About 30% of these were down-regulated and about 70% were up-regulated in Sahara 3771 in response to B treatment. Most of the probe sets (59%) up-regulated in Sahara 3771 did not respond to B treatment in Clipper. These genes are either salt stress responsive or related to plant defense and thus could play a key role in protecting barley plants from the toxic effects of B. Two differentially expressed probe sets annotated as B transporters were identified between Sahara 3771 and Clipper under control condition. These two B transporter probe sets did not respond to B treatment but showed opposing expression patterns in the two varieties. One of these probe sets (Contig21126_at) is similar to the B transporter gene isolated from the SSH experiment that maps to the 4H tolerance locus. The map location and expression of this B transporter gene suggest that it could be the borate anion efflux transporter predicted by the proposed efflux model of B tolerance in Sahara 3771 barley. The other B transporter gene (Contig14139_at) showed over expression in Clipper under control condition and could be contributing to high B accumulation in Clipper which needs further investigation. Data from both experiments have indicated that B toxicity triggers oxidative stress and that jasmonate-based signaling plays a key role in B toxicity tolerance. SSH data indicate that Sahara 3771 which evolved in the harsh environment of Africa is more efficient in osmoregulation and ROS scavenging than Clipper. This trait is likely to give Sahara 3771 an edge over Clipper in tolerating toxic the effect of B. In addition to the efflux mechanism, which becomes less efficient with increasing B supply, Sahara 3771 appears to apply a number of other mechanisms for alleviating or withstanding toxic B induced stress to sustain growth. Some of these mechanisms are already known to be used by plants to cope with a number of stresses. / Thesis (Ph.D.) -- University of Adelaide, School of Agriculture, Food and Wine, 2008

<p>The company Västra Mälardalens Kommunalförbund, VMKF, wishes to revise and optimize their present data and IP-telephony network as of today consists of the three municipalities Köping, Arboga and Kungsör. As a municipal corporation, they seek consultation regarding internal as well as external review and investigation of the main structure of the network, its functionality and safety. By today’s increasing demands of Internet accessibility, availability of services and security far more extends the requirement of a complete network design. The foundation of networking rests on the balance between each of these necessities. Therefore, it is of grave importance to optimize a network design, use of hardware and to minimize the administrative overhead. In particular, when the municipality is short of resources and time means money. By letting an impartial investigation of the network act as a starting point it was established that several improvement could be applied. Among these a reconstructed and improved network topology that includes subjects as routing, switching, safety and security, quality of service and technical administrative overhead and the implementation of a real time monitoring of network bandwidth consumption.</p> / <p>Företaget Västra Mälardalens Kommunalförbund, VMKF, har önskemål om att granska och optimera deras befintliga data- och IP-telefoninätverk som i dagsläget spänner över de tre kommunerna Köping, Arboga och Kungsör. Som ett kommunalägt företag önskar de konsultation rörande intern såväl som extern granskning och optimering av huvuddelen av nätverkets funktionalitet samt säkerhet. I och med dagens ökade Internetanvändning och funktionalitetsbehov ställs allt högre krav på tillgänglighet, säkerhet och användarvänlighet. Nätverksteknik bygger mycket på balansen mellan dessa tre punkter. Därför gäller det att optimera nätverkets design, hårdvaruanvändning och att minimera administrativa laster. Detta i synnerhet då kommunens resurser är knappa och då tid i dagens samhälle innebär pengar. Genom att låta en granskning över nätverket som det ser ut i dag ligga till grund konstaterades att flertalet förbättringsmöjligheter kunde genomföras. Bland dessa återfinns en omstrukturerad nätverksdesign som innefattar routing, switching, säkerhet, QoS och teknisk administration samt implementeringen av en realtidsövervakning av bandbreddsanvändning.</p>