We consider the problem of controlling the transmission rate in a communication network where each node adjusts its own transmission rate exclusively based on the physical medium occupation (the band occupancy of the aggregate complementary nodes). We show how to design a decentralized control for maximizing both band occupancy and fairness. If the network is fully connected, the problem admits a

We propose a novel approach to the problem of inverse kinematics for possibly redundant planar manipulators. We show that, by considering the joints as point masses in a fictitious gravity field, and by adding proper constraints to take into account the length of the links, the kinematic inversion may be cast as a convex programming problem. Convex constraints in the decision variables (in particu

The problem of synthesizing network-decentralized observers arises when several agents, corresponding to the nodes of a network, exchange information about local measurements to asymptotically estimate their own state. The network topology is unknown to the nodes, which can rely on information about their neighboring nodes only. For homogeneous systems, composed of identical agents, we show that a

Given a static plant described by a differentiable input-output function, which is completely unknown, but whose Jacobian takes values in a known polytope in the matrix space, this paper considers the problem of tuning (i.e., driving to a desired value) the output, by suitably choosing the input. It is shown that, if the polytope is robustly non-singular (or has full rank, in the non-square case),

Oscillators are essential to fuel autonomous behaviours in molecular systems. Artificial oscillators built with programmable biological molecules such as DNA and RNA are generally easy to build and tune, and can serve as timers for biological computation and regulation. We describe a new artificial nucleic acid biochemical reaction network, and we demonstrate its capacity to exhibit oscillatory so

In a world where predictive big data analytics and data driven policy and design are increasingly prevalent, the concept of broken data seeks to interrogate and disrupt the possibilities associated with these trends. Concepts of breakage, damage and repair, and recent literatures about ‘broken world’ type theories, offer us an alternative starting point: what are the implications of putting these

In a world where predictive big data analytics and data driven policy and design are increasingly prevalent, the concept of broken data seeks to interrogate and disrupt the possibilities associated with these trends. Concepts of breakage, damage and repair, and recent literatures about ‘broken world’ type theories, offer us an alternative starting point: what are the implications of putting these

September 19th 2015 the exhibition/installation Multistable Fields opened in the atrium of the main building at Lund university. Here’s the synopsis:The main building of Lund University was inaugurated in 1882. In the building conceived by architect Helgo Zettervall the rational quest for knowledge of Academia is enmeshed with a world of mythical symbols. Sphinxes and griffins meet deans and profe

Fieldnotes is an exploration of imaginary geographies. It is a series of surreal short films examining how the concept of ethnographic fieldnotes can be related to places, situations and the way ethnography is communicated. Each film in the series is also an evocation, based on video recorded at a single location at a single time. The video is then composited and soundtracked into a surreal accoun

What does it mean to be close to nature? This question is examined in this video work based on 9 short clips. The first clip of a woody landscape was recorded outside of Taivalkoski, Koillismaa, Finland using an Intenso Viddy, a cheap Video Messenger.The clip, 30 seconds in duration, of the landscape was transferred from the Viddy to a laptop. When played on the laptop the screen was filmed with t

Flame structures, blowout limits and emissions of swirlstabilized premixed methane-air flames were studied experimentally in a small atmospheric combustor rig. Combustion sections with rectangular cross section (30mm by 40mm) and circular cross section (inner diameter = 39mm) were used to investigate effects of combustor geometry on the flame's performance. Flame structures and instabilities were

In the present work, a downscaled prototype 4th generation Dry Low Emission gas turbine (SGT-750) burner (designed and manufactured by Siemens Industrial Turbomachinery AB, Sweden) was investigated using an atmospheric experimental facility. The primary purpose of the research is to analyze flame stability and emission capability of the burner. OH Planar Laser-Induced Fluorescence (OH-PLIF), and c

Lean premixed dry low emission (DLE) combustion system in a gas turbine engine is a globally accepted concept to reduce pollutant emissions and to improve combustion efficiency. This study is focused on an industrial downscaled prototype burner (4th Generation Dry Low Emission Burner for SGT-750 designed and manufactured by Siemens Industrial Turbo machinery AB), which has been tested extensively