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Physical limitations on broadband scattering

In this paper, physical limitations on broadband scattering are presented for heterogeneous anisotropic scatterers of arbitrary shape. A measure of broadband scattering in terms of the extinction cross section is derived based on the holomorphic properties of the forward scattering dyadic. An isoperimetric bound for isotropic material parameters is presented and ellipsoidal scatterers are discusse

Lärare skriver – för att förbättra lärande och undervisning

Vid medicinska fakulteten i Lund forskar man inte bara inom medicin, det forskas även om lärande och undervisning. Vi har intresserat oss för denna utbildningsvetenskapliga forskning och velat ta reda på vad den handlar om, hur den relaterar till fakultetens utbildningsverksamhet, samt varför den har genomförts. Särskilt har vi undrat om forskningen är att betrakta som SoTL, dvs Scholarship of Tea

A Look at the Roles of Look & Roles in Embodied Pedagogical Agents - A User Preference Perspective

. The paper presents a theoretical framework addressing three aspects of embodied pedagogical agents: visual static appearance, pedagogical role, and communicative style. The framework is then applied to a user study where 90 school children (age 12 15) in a dummy multimedia program were presented with either an instructor or a learning companion condition. They were then to choose between eight v

mm-Wave Pulse-Generation Circuits in 65nm CMOS

Three mm-wave pulse generation circuits fabricated in a standard 65nm CMOS process are presented. Two versions are based on the cross-coupled NMOS LC-VCO (500um × 300 um), and one is based on the Colpitts VCO (600um × 300 um). No additional buffers are used in the cross-coupled versions, as they are directly loaded by 50 Ohms through a balun. They can produce measured pulses exceeding 8dBm peak ou