Es werden nahfeldoptische Phänomene an Raster-Sonden-Geometrien untersucht. Hierzu zählen die Feldverstärkung an laserbestrahlten Rastersondenspitzen und die Feldverteilung in nahfeldoptischen Apertur- und Koaxialspitzen. Zur Berechnung der Feldverteilung werden verschiedene numerische Verfahren wie die Methode der Randelemente (BEM) und die Methode der Finiten Integration (FIT) angewendet. Die durchgeführten Berechnungen sagen eine erhebliche Feldüberhöhung im Nahfeld von laserbestrahlten Rastersondenspitzen voraus. Es wird diskutiert, ob diese Feldüberhöhung ursächlich für die Modifikation der Oberfläche unter der Sondenspitze verantwortlich ist. Zur weiteren Klärung der Strukturierungsmechanismen wird die Stromantwort des Tunnelübergangs auf Laserbestrahlung experimentell untersucht. Die Detektion des Stromsignals erfolgt mit einem neuen Vorverstärker, der die Eigenschaften einer hohen Eingangsimpedanz, einer hohen Transimpedanz und einer hohen Bandbreite miteinander vereinigt. Weiterhin wird die Feldverteilung in SNOM-Spitzen, insbesondere in den sogenannten Koaxialspitzen, bestimmt. Es wird untersucht wie sich koaxial Moden in koaxialen SNOM-Spitzen anregen lassen und wie sie sich ausbreiten. Ausgehend von bereits existierenden Entwürfen solcher Spitzen wird diskutiert, welche Strukturen sich zur Anregung von koaxialen Moden eignen.

Uno degli aspetti più documentati del comportamento deviante è che una porzione considerevole di reati è commessa da più persone che collaborano tra loro, e non da criminali che agiscono in autonomia. Oltre ad analizzare le caratteristiche della compartecipazione nei reati, alcuni studi recenti si sono focalizzati sulla comprensione della sua evoluzione lungo la carriera criminale dell’individuo, e sul suo impatto sulla traiettoria criminale. Il concetto di collaborazione criminale è particolarmente rilevante nel contesto dei gruppi criminali organizzati, per i quali le interazioni tra i membri costituiscono l’essenza del loro funzionamento, e i reati commessi sono spesso logisticamente complessi. Ciononostante, il fenomeno della collaborazione criminale ha ricevuto scarsa attenzione nella ricerca sulla criminalità organizzata, e nessuno studio analizza il suo ruolo nel definire la traiettoria criminale del singolo individuo che entra a fare parte di un'organizzazione criminale. Il presente studio mira a colmare questa lacuna in letteratura analizzando i dati sui 178.427 reati commessi da tutti gli 11.138 individui condannati per associazione mafiosa in Italia tra il 1985 e il 2017. I dati includono informazioni sull’eventuale concorso in reato per ogni crimine commesso. L’analisi condotta si avvale di diverse metodologie quantitative con lo scopo di fornire un quadro descrittivo della collaborazione criminale nella criminalità organizzata; determinare se i membri delle organizzazioni criminali hanno diverse traiettorie longitudinali di collaborazione criminale; comprendere quale sia l’impatto di commettere crimini in collaborazione con altri individui sul comportamento criminale futuro; e studiare come la collaborazione criminale sia correlata con il reclutamento nella criminalità organizzata. I risultati dell’analisi dimostrano che il concorso in reato non è una caratteristica incidentale dei crimini commessi dagli individui che fanno parte dei gruppi criminali organizzati. Alcune delle caratteristiche della collaborazione criminale nel contesto della criminalità organizzata riflettono i risultati principali ottenuti negli studi condotti in altre popolazioni criminali, ma emergono alcune peculiarità. Inoltre, il trend aggregato di compartecipazione nei reati dei mafiosi italiani può essere approssimato da cinque traiettorie che raggruppano individui con caratteristiche specifiche. Infine, la collaborazione criminale appare correlata con dei cambiamenti nei successivi comportamenti criminali degli individui: in particolare, è connessa a una più alta probabilità di commettere reati violenti, e di entrare a far parte dell’organizzazione criminale nel breve periodo. Lo studio discute questi risultati alla luce della letteratura sullo sviluppo dei comportamenti criminali per i membri dei gruppi criminali organizzati, e in relazione alla ricerca esistente sulle cause e conseguenze di commettere reati in collaborazione con altri individui. / One of the most documented findings on delinquent behavior is that many crimes are committed in the company of others rather than by solo offenders. Besides studying the characteristics of co-offending, recent works have focused on understanding its evolution over the individual criminal career, and its impact on the offending trajectory. Co-offending is especially relevant within organized criminal groups, where interactions among participating offenders constitute the core functioning of the criminal organization, and crimes committed are often logistically complex. In spite of this, few studies on co-offending in organized crime exist, and none of them investigates the role that co-offending has on the offending pathway of the single individual. This study addresses this gap in research by analyzing data on all the 178,427 crimes committed by 11,138 offenders convicted for mafia association in Italy between 1985 and 2017. The data set includes information on whether each crime was committed with accomplices. The analysis exploits different quantitative methodologies with the aim to describe the characteristics of co-offenses and co-offenders in organized crime; determine whether organized crime offenders have different longitudinal co-offending trajectories; investigate whether committing crimes with others impacts future offending; and understand how co-offending is related to recruitment into organized crime. Results demonstrate that co-offending is not an incidental feature of crimes committed by organized crime offenders. Some of the characteristics of co-offending in organized crime reflect findings from other offending samples, but some peculiarities emerge. Furthermore, the longitudinal co-offending behavior of Italian organized crime offenders is best approximated by five trajectories that group offenders with distinct characteristics. Finally, co-offending is related to changes in the future offending behavior of organized crime offenders: in particular, it is related to higher chances of engaging in violent forms of delinquency and experiencing organized crime recruitment in the short term. These findings are discussed in relation to both research on the developmental course of offending for members of organized criminal groups, and existing knowledge on the causes and consequences of offending with others.

This work attempts to characterize internal modernization and international expansion of Russian speaking organized crime. Special emphasis is placed on the main stages of development of organized crime in the Soviet Union and its current state primarily in Russia and Ukraine. The paper proffer the new definition of modern forms of organized crime and different characteristics of regimes as for the relations between the state and organized crime (criminal syndicalism, mafia, state kleptocracy). The paper characterizes different types of international expansion of Russian speaking groups (regional expansion, global retirement and emigration). In this regard, research was focused primarily on the activities of the Russian speaking organized crime groups in the EU and the Czech Republic. In the last phase of the work I focused my research on some important measured how to reduce risk in the current conditions. Though the work is primarily devoted to organized crime from the CIS countries, it should be noted, modernization of organized crime everywhere in the world takes place by a similar manner. It was therefore necessary to briefly address the wider contextual issues. Working so many places highlights some aspects of the development of organized crime in Italy, USA , Czech Republic, Japan and China.

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A significant security risk of modern vehicles is their vulnerability to relay attacks, due to challenge-response methods, such as those employed in Passive Keyless Entry (PKE) used by most commercial cars, being inherently exposed. This class of attacks are where communication between a vehicle and its key is relayed by an attacker over long range - thereby bypassing any encryption and unlocking the vehicle without requiring direct access to the key. While a multitude of defenses have been proposed in recent years, many lack either robustness or practicality. Any viable system will likely have to rely on an environmental parameter which is not easily manipulated. Moreover, the system has to be: cost effective; easily implementable; and take user comfort, such as the key’s battery life, into account. This thesis implements and evaluates a PKE system resistant to relay attacks, analyses a multitude of proposed strategies in literature for feasibility, as well as suggests a novel method: Approach Curve Matching. It is concluded that the most promising strategies are: Immobility Detection, Distance Bounding Protocols, and Approach Curve Matching - the first of which is chosen to be implemented in the prototype PKE system. The project develops a PKE system and implements the communication protocol using Bluetooth, as opposed to the conventional RFID. Immobility Detection, using an accelerometer, is then implemented. The final system is then tested and evaluated. It is concluded that while Immobility Detection is not comprehensively effective, it is easily implementable, cost-effective, and can greatly increase the security of PKE systems. Finally, it is proposed that Immobility Detection should be employed promptly by manufacturers while investigating potentially more effective, albeit uncertain, strategies. / En betydande säkerhetsbrist av moderna fordon är deras sårbarhet mot så kallade ’relay attacker’. Dessa typer av attacker, där signaler mellan bilen och nyckeln vidarebefordras, kringgår all kryptering och låser upp bilen utan att ha direkt tillgång till nyckeln. En stor del av kommersiella fordon tillämpar ’Passive Keyless Entry’ (PKE) som bygger på ’challenge-response’ metoder som visats vara särskilt utsatta för dessa attacker. En mängd olika skyddssystem har föreslagits på senare år, men många saknar erforderlig robusthet eller genomförbarhet. Ett lämpligt system bör uppfylla en rad olika kriterier. Strategin måste grundas på en omgivningsparameter som är både oföränderlig och tillräckligt rymdberoende att två nära positoner kan skiljas åt. Dessutom ska systemet vara kostnadseffektivt, implementerbart, och ta hänsyn till användarkomfort såsom batteritid. Projektets huvudsyfte är konstruktionen och analysen av ett ’relay attack’ resistent PKE system. I detta projekt ingår också en analys av ett antal föreslagna försvar och ett förslag om en ny metod: ’Approach Curve Matching’. Slutsatsen dras att de mest lovande taktikerna är: analys av Jaccard indexet av Wi-Fi hotspots, ’Distance Bounding Protocols’, ’Approach Curve Matching’ och ’Immobility Detection’ som också implementeras i prototyp PKE systemet. Projektet utvecklar först ett PKE system med två Raspberry Pis som agerar som bilens och nyckelns mikrodatorer och implementerar kommunikationsprotokollet med hjälp av Bluetooth. ’Immobility Detection’ är sedan implementerad genom en inbyggd accelerometer i nyckeln. Slutligen testas och utvärderas systemet. Det konkluderas att trots att ’Immobility Detection’s effektivitet inte är helt omfattande är den lätt att implementera, kostnadseffektiv, och kan bidra till en betydlig ökning av säkerheten hos PKE system. Vidare observerade projektet att Bluetooths ’Received Signal Strength Indicator’ (RSSI) mätningar är utsatta för avsevärd ostadighet och är allmänt omgivningsberoende. Därför anses Bluetooth RSSI inte lämplig för PKE tillämpningar även om andra metoder för avståndsmätning med Bluetooth kan ha högre prestanda. Det föreslås att ’Immobility Detection’ tillämpas av tillverkare omgående medans andra potentiellt mer effektiva strategier utreds.

Name: Issues in organized crime Aims of the thesis: 1. To define and classify organized crime 2. To describe historical development of organized crime 3. To analyze organized crime in the states where its presence has become evident i.e. Italy, USA, Russia and Japan 4. To characterize the main activities of organized crime 5. To define the means of fighting organized crime Methods: When analyzing organized crime, it is impossible to use research methods that would comprise direct contact with a criminal environment. Indirect evidence was used to compile the thesis. Methods of research: 1. The use of information from publications 2. Analysis of documents 3. Research into selected legal means of fighting organized crime 4. Content analysis of the press 5. Statistics Results: Various views on organized crime, its features and its typology have been defined. Its causes and the conditions under which organized crime arises, as well as its beginnings, were described. Findings about organized crime in selected countries were analyzed; attention was drawn to history, the present day and occurrences and activities of the main organized groups. The main activities of organized crime were described in four groups, focusing on their description, organization and the legal issues. Eventually, possible means of...

Studien undersöker tre strategiskt valda Facebook-kampanjer där projektledarna blivit intervjuade om deras uppfattningar av kampanjerna. Fyra grupper undersöktes sedan med fyra deltagare i varje för att se hur denna publik uppfattade kampanjerna. Därefter jämfördes skillnader och likheter i uppfattningarna mellan projektledarna och den utvalda publiken. I studien undersöks även vad båda parter anser karaktärisera en lyckad Facebook-kampanj. Teorierna som används är technology-image expectancy gap teorin som uppmärksammar hur publikens förväntningar kan mötas upp av organisationen och virtuellt kampanjskapande samt marknadsföring i sociala medier. Kvalitativa analyser av projektledarna och den valda publiken har genomförts för att undersöka skillnader och likheter i deras uppfattningar av de utvalda kampanjerna och vad de anser karaktäriserar en lyckad Facebook-kampanj. I analysen av resultatet kunde vi utifrån teorierna hitta skillnader och likheter i projektledarnas och publikens uppfattning av de kampanjer vi undersökte. När det kom till uppfattningarna kring vad som karaktäriserar en lyckad kampanj på Facebook var deras åsikter till största del lika med undantaget att projektledarna även poängterade omvärldsbevakning som en viktig del i kampanjskapandet på Facebook. Vi såg i resultatet att det fanns ett gap mellan projektledare och publiken i den mån att det inte handlar om att skapa den häftigaste kampanjen bara på Facebook då publiken genom andra medier påverkas att interagera med organisationen och därmed ser nyttan med att delta i kampanjen. Intressant och anpassat innehåll för publiken är faktorer som ger spridning på Facebook men främst genom andrahandskällor som exempelvis nyhetsinslag eller videoklipp från externa webbplatser, vilket tyder på att andra medier bör bearbetas under kampanjen. Främst ska kampanjen vara till nytta för publiken i form av underhållning eller en tjänst. Kampanjen bör även väcka en viss nyfikenhet hos publiken genom igenkännande av en produkt eller en känd person. Dagens kampanjer kräver ett gediget förarbete med omvärldsbevakning av publikens intressen vilket kan generera ett intressant innehåll och kunskap för dem som jobbar med kampanjen. Detta följs av omfattande realtidskommunikation med publiken.

Les associations contribuent à garder en vie les espaces de pluralisme indispensables à la démocratie. Un lien est établi entre vitalité associative et production de capital social, car les associations participent à la généralisation de la confiance, nécessaire au bon fonctionnement institutionnel et économique. Cependant, la notion de capital social se fonde sur des postulats discutables : l'un " déterministe " et l'autre " libéraliste ". Ainsi, à partir d'une réalité " complexe ", celle de la Sicile, nous avons essayé de déconstruire ces a priori théoriques. Ceci afin d'utiliser la notion de capital social dans un cadre interprétatif plus ample qui, d'une part ne s'arrête pas à la seule analyse des interactions sociales au sein des réseaux mais prend en compte la nature spécifique de leur contexte. Et, d'autre part, puisse réintroduire les modalités d'interaction entre associations et pouvoirs publics ainsi que le rôle des institutions dans la production de capital social.

No description available.

No description available.