Non injectivity of the q-deformed von Neumann algebra

We prove that the von Neumann algebra generated by q-gaussians is not injective as soon as the dimension of the underlying Hilbert space is greater than 1. Our approach is based on a vector valued Khintchine type inequality for Wick products. The same proof also works for the more general setting of a Yang-Baxter deformation. Our techniques can also be extended to the so called q-Araki-Woods von Neumann algebras recently introduced by Hiai. In this latter case, we obtain the non injectivity under some asssumption on the spectral set of the positive operator associated with the deformation

Happiness Institutions

Bakhjulsstyrning av fordon är en möjlig konfiguration som lite glömts bort inom fordonstekniken. Tidigare arbeten inom ämnet bakhjulsstyrning är väldigt detaljerade och snäva i sin analys. I detta arbete vill författaren visa en bakgrund till hur olika farkoster styrs samt analys av detta. Syftet med arbetet är att utifrån litteratursökning och intervjuer kunna besvara vilken inverkan drivkällans placering och de konceptuella skillnaderna mellan olika farkoster har på styrningens placering. Samt vilka förväntade egenskaper en farkost får med icke konventionell styrning. Med hjälp av en simulering i MATLAB är syftet att kunna besvara vilken roll massa, hastighet och axellängd spelar för ett bakhjulsstyrt fordon och hur responsen ser ut jämfört med ett framhjulsstyrt fordon. Resultatet från intervjuerna och litteraturen visar att drivkällans placering nära rodret är väldigt viktig för fartygs styrningsförmåga. Däremot för flygplan påverkar det mest lastförmåga och för fordon tyngdpunktens placering. De konceptuella skillnaderna visar på att större fordon har mer att vinna på fyrhjulsstyrning då en mindre vändradie är merkritiskt för dessa och att flygplan som flyger i överljudsfart behöver andra vinguppsättningar. För fartyg har det visat sig att en liten vändradie är viktigt i hamnområden och att både stora och små fartyg då använder sig av bogpropellrar. De förväntade egenskaperna för en ickekonventionell styrning är främst negativ för fordon och fartyg, då det finns risk för instabilitet och överstyrning, medan flygplan redananvänder sig av styrningen fram i form av nosvingar. Simuleringarna visar att ett bakhjulsstyrt fordon bör ha en hastighetsbegränsning då det blir svårkontrollerat i höga hastigheter över 50km/h. En större massa har visat sig hämma magnituden av den laterala accelerationen en i fel riktning och en längre axellängd minskar rotationshastigheten kring gir-led. Resultaten visar också att ett bakhjulsstyrt fordon har en fördröjning av den laterala accelerationen jämfört med ett framhjulsstyrt fordon på 0,1-0,2 sekunder beroende av bland annat massa, axellängd och hastighet. Responstesten visar att denna fördröjning bidrar till att den laterala förflyttningen är fördröjd första sekunden för hastigheter 10-90km/h men att redan efterytterligare 1,5 sekunder är den dubbel så stor för hastigheter 50-90km/h. Slutsatsen är att fordon inte har bakhjulsstyrning i höga hastigheter på grund av den fördröjda responsen i början samt av att utslaget efter några sekunder blir väldigt mycket kraftigare vilket gör fordonet svårt att kontrollera.Rear wheel steering of vehicles is a possible steering, which has been forgotten in vehicle design. Earlier works show only details concerning one vehicle type from this subject. In this work the author will first present a background to how different vehicles are steered and then the analysis of it. The purpose with this paper is to from literature and interviews answer to which impact the placement of the engine and the conceptual differences have on the steering from different vessels. It will also answer which anticipated properties the steering will have if it´s not placed in a conventional way. Through simulation in MATLAB the paper will answer to which degree mass, velocity and length of axle influences steering behaviour of a rear wheal steered, RWS, car and how the steering response is different to a front wheal steered car, FWS. The result from the literature and the interview shows that placement of engine and propeller near the rudder is very important for a ships steering capability. For vehicles it has most effect on the centrum of gravity, which is to prefer in middle of the vehicle,and for airplanes the ability to place cargo. The conceptual differences shows that a larger vehicle has more to gain, if it is equipped with four wheel steering, due to turning radius is a more critical aspect. For airplanes in super sonic speed it reveals that they need another set of wings. Ships need a smaller turning radius in harbours and all size of ships then use thrusters. The properties of a vessel with not conventional steering are most negative for cars and ships because of risk for oversteering and instability, while for airplanes its already in use in form of canard wings. The simulations display that rear wheel steered vehicle should have a limit of velocity because of its behaviour in high speeds over 50 km/h. A larger mass has shown todepress the magnitude of lateral acceleration in wrong direction and a larger length of an axle is shown to depress the yaw-rate. The result also displays that a RWS vehicle has a delay of the lateral acceleration compared to a FWS vehicle with approximately 0,1-0,2 seconds depending on mass, velocity and length of axle. The test of response indicates that this delay contributes to the delay of the lateral movement of the vehicle the first second for speeds between 10-90 km/h, but after only 1,5 seconds further thelateral movement is twice the value for speeds 50-90km/h. The conclusion is that vehicle doesn’t have RWS due to the delay in response in the beginning and the very larger lateral movement after only seconds later, which makes the vehicle hard to control

Improving OpenStack Swift interaction with the I/O stack to enable software defined storage

This paper analyses how OpenStack Swift, a distributed object storage service for a globally used middleware, interacts with the I/O subsystem through the Operating System. This interaction, which seems organised and clean on the middleware side, becomes disordered on the device side when using mechanical disk drives, due to the way threads are used internally to request data. We will show that only modifying the Swift threading model we achieve an 18% mean improvement in performance with objects larger than 512 KiB and obtain a similar performance with smaller objects. Compared to the original scenario, the performance obtained on both scenarios is obtained in a fair way: the bandwidth is shared equally between concurrently accessed objects. Moreover, this threading model allows us to apply techniques for Software Defined Storage (SDS). We show an implementation of a Bandwidth Differentiation technique that can control each data stream and that guarantees a high utilization of the device.The research leading to these results has received funding from the European Community under the IOStack (H2020-ICT-2014-7-1) project, by the Spanish Ministry of Economy and Competitiveness under the TIN2015-65316-P grant and by the Catalan Government under the 2014-SGR-1051 grant. To learn more about the IOStack H2020 project, please visit http:nnwww.iostack.eu.Peer ReviewedPostprint (author's final draft

Política local

Abstract not availabl

Novel·la de poeta

Notícia i crítica sobre la publicació catalana d'Una noia a l'hivern de Philip Larkin traduïda per Jordi Arbonès, publicada a El 9 Nou

A study on the effects of productivity of human resources in banking network and work ethics

Today, human resources are considered as the most important assets of any organization. Generally, human being has specific ethical features on personality characteristics forming the attitude, speech and behavior. It is possible that some factors create different attitudes, speech and behavior among people who are in one particular position. These human characteristics influence the efficiency and effectiveness of organization. The present study aims to investigate the relationship between work ethics and human resources productivity in banking network of city of Zahedan, Iran. The study chooses a sample of 236 employees who worked for different banks in city of Zahedan, Iran in 2013. To analyze the data, Pearson correlation test, Friedman ranking and independent t-test were used. The results show that there was a significant association between work ethics components and productivity (efficiency and effectiveness) of human resources

Exactness of the Fock space representation of the q-commutation relations

We show that for all q in the interval (-1,1), the Fock representation of the q-commutation relations can be unitarily embedded into the Fock representation of the extended Cuntz algebra. In particular, this implies that the C*-algebra generated by the Fock representation of the q-commutation relations is exact. An immediate consequence is that the q-Gaussian von Neumann algebra is weakly exact for all q in the interval (-1,1).Comment: 20 page

Declaració mediambiental

EMAS, ISO 9001:2000, ISO 14001:2004Càmpin