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An antenna system and a method for operating an antenna system

An antenna system is disclosed that includes two or more antennas and an impedance matching network. The antennas of the antenna system are closely separated, such as by a distance of no more than a wavelength of received signals divided by two. The impedance matching network is adapted to respond to and counteract performance degradation resulting from cross coupling between the antennas. Related

On the Challenges for Time-of-Flight Electron Spectroscopy at Storage Rings

Popular Abstract in Swedish Den rykande startpistolen eller Konsten att ta tid på en flygande elektron Flygande elektroner kan berätta mycket om hur världen sitter ihop. Elektroner som lämnar ytan av något material avslöjar både vilka atomer som finns i materialet och hur de kemiska bindingarna ser ut. Allt detta är nödvändigt att förstå när man vill utveckla nya material – till exempel för kretTime-of-flight (TOF) techniques for energy analysis have been common in electron spectroscopy for many decades. TOF-based electron spectrometers benefit from higher transmission and information rate compared to their main competitor: the hemispherical analyser; the drawback being their lower energy resolution. However, the advent of angle-resolved TOF spectrometers for electron energy analysis cha

Immunity to Salmonella infection

Popular Abstract in Swedish Salmonella infektion drabbar ca 16 miljoner människor i världen per år. Salmonella sprids genom mat och vatten och fšrekommer främst i länder där god hygien är ett problem. Beroende på vilken typ av Salmonella som man infekteras av, kan man drabbas av magsjuka eller en allvarlig systemisk infektion som i värsta fall kan leda till döden (tyfoid feber). Salmonella tar sigThe immune system has several strategies to combat infections. The present study investigates various aspects of the interaction between Gram negative bacteria, particularly Salmonella, and antigen presenting cells (APC). Salmonella is an intracellular bacterium infecting mice and man. Salmonella typhimurium infection in mice is a frequently used model for studying systemic Salmonella infection. O