328 research outputs found
Bjorn again
No full textWell they may have lost out on their fair share of the GST, but my friends at the University of Western Australia (UWA) are A$4 million better off thanks to a one-off Federal government grant by the Minister for Education Christoper 'the fixer' Pyne. The grant is to establish a new 'Australia Consensus Centre' at UWA. The consensus among most of my peers is that this was a bad idea. Why? Well first off, the new Centre is a partnership between the Copenhagen Consensus Center and the University of Western Australia. It thus features the Danish academic Bjorn Lomborg, author of the controversial books The Sceptical Environmentalist and Cool It, both of which argue that climate change is not our biggest problem and that we should relax about it (or in Bjorn's terms, 'cool it')
Book review: picking holes in litany of loss
No full textCrisis, what environmental crisis? Eric Neumayer examines the facts. Author reviews: Bjorn Lomborg's The skeptical environmentalis
On the Pitfalls and Vulnerabilities of Schedule Randomization against Schedule-Based Attacks
No full textSchedule randomization is one of the recently introduced security defenses against schedule-based attacks, i.e., attacks whose success depends on a particular ordering between the execution window of an attacker and a victim task within the system. It falls into the category of information hiding (as opposed to deterministic isolation-based defenses) and is designed to reduce the attacker’s ability to infer the future schedule. This paper aims to investigate the limitations and vulnerabilities of schedule randomization-based defenses in real-time systems. We first provide definitions, categorization, and examples of schedule-based attacks, and then discuss the challenges of employing schedule randomization in real-time systems. Further, we provide a preliminary security test to determine whether a certain timing relation between the attacker and victim tasks will never happen in systems scheduled by a fixed-priority scheduling algorithm. Finally, we compare fixed-priority scheduling against schedule-randomization techniques in terms of the success rate of various schedule-based attacks for both synthetic and real world applications. Our results show that, in many cases, schedule randomization either has no security benefits or can even increase the success rate of the attacker depending on the priority relation between the attacker and victim tasks.Embedded System
Sure we can, but SHOULD we? Digital Head and the Ethics of Intelligence
No full textExamining the unpredictable and disruptive possibilities contained within new technologies. Includes correspondence with professor Bjorn Stenger and author and technology philosopher Tom Chatfield
Impact of shade on outdoor thermal comfort—a seasonal field study in Tempe, Arizona
No full textabstract: Shade plays an important role in designing pedestrian-friendly outdoor spaces in hot desert cities. This study investigates the impact of photovoltaic canopy shade and tree shade on thermal comfort through meteorological observations and field surveys at a pedestrian mall on Arizona State University’s Tempe campus. During the course of 1 year, on selected clear calm days representative of each season, we conducted hourly meteorological transects from 7:00 a.m. to 6:00 p.m. and surveyed 1284 people about their thermal perception, comfort, and preferences. Shade lowered thermal sensation votes by approximately 1 point on a semantic differential 9-point scale, increasing thermal comfort in all seasons except winter. Shade type (tree or solar canopy) did not significantly impact perceived comfort, suggesting that artificial and natural shades are equally efficient in hot dry climates. Globe temperature explained 51 % of the variance in thermal sensation votes and was the only statistically significant meteorological predictor. Important non-meteorological factors included adaptation, thermal comfort vote, thermal preference, gender, season, and time of day. A regression of subjective thermal sensation on physiological equivalent temperature yielded a neutral temperature of 28.6 °C. The acceptable comfort range was 19.1 °C–38.1 °C with a preferred temperature of 20.8 °C. Respondents exposed to above neutral temperature felt more comfortable if they had been in air-conditioning 5 min prior to the survey, indicating a lagged response to outdoor conditions. Our study highlights the importance of active solar access management in hot urban areas to reduce thermal stress.Corresponding Author:
Ariane Middel
Arizona State University
[email protected]
The Z axis and its composite matrix of perception
No full textThesis: S.M. in Art, Culture and Technology, Massachusetts Institute of Technology, Department of Architecture, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections."June 2016." Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 94-95).Beliefs and ideas mingle with our perceptions of physical objects and spaces as the same cognitive material. Within a conceptual mental space, these perceptions constitute a composite matrix of perception. When we navigate physical spaces, we are navigating ideas, and when we maneuver ideas we maneuver spaces. Ideologies form when the organization of this composite matrix crystallizes, refusing to adjust to new ideas or visual clues. This interplay between ideas and objects in space can lead to the formation of ideology. This thesis explores the ideological nature of navigable spaces and identifies two ways of escaping their ideological conditions: first, through the implementation of technical and conceptual devices, and second, through internal processes such as daydreaming and hypnosis. These two techniques often mingle. Various examples from art, film, and online communities are identified to demonstrate these techniques. The thesis will present video based experiments that test our perceptions in space by playing with the constructs of spatial mediation. These artistic experiments collectively form a vocabulary of techniques for probing the conceptual and physical dimensions of spaces. Throughout, this thesis aims to unpack the fundamental questions: can space exist without ideology, and if so, who can we be within this vacuum, unable to affect our surroundings?by Bjorn Eric Sparrman.S.M. in Art, Culture and Technolog
Model Predictive Control of a Combined EGR/SCR HD Diesel Engine
No full textMaterials Noise, Vibration and Harshness Parts and Components Power and Propulsion Quality, Reliability and Durability Safety Tests and Testing Transportation Systems Vehicles and Performance Other Options Papers by Event SAE Home > Papers> By Event> SAE 2010 World Congress & Exhibition Model Predictive Control of a Combined EGR/SCR HD Diesel Engine Date Published: 2010-04-12Paper Number: 2010-01-1175 DOI: 10.4271/2010-01-1175 Author(s): Claes Westerlund - Scania CV AB Bjorn Westerberg - Scania CV AB Ingemar Odenbrand - Lund Univ. Rolf Egnell - Lund Univ. View All CollapseAbstract Achieving upcoming HD emissions legislation, Euro VI / EPA 10, is a challenge for all engine manufacturers. A likely solution to meet the NO x limit is to use a combination of EGR and SCR. Combining these two technologies poses new challenges and possibilities when it comes to optimization and calibration
Response: "Conversion During Laparoscopic Liver Resections: a Step Forward"
No full textOperations should be then broken down in steps (i.e. trocar position, preparation of Pringle maneuver, intraoperative ultrasound, mobilization of the liver, pedicle dissection, hepatic veins exposure...) and reviewed with the proctor multiple times in order to speed up the learning process and facilitate the approach to the technique. Every laparoscopic liver resection is in fact made up of different steps each having potential pitfalls; the difficulty of accurately stage the disease through the intraoperative ultrasound, the challenges of managing potential bleeding and the different view during liver mobilization are only examples of what a surgeon has to get through during a laparoscopic resection of the liver
Polymeric Backbone Eutectogels as a New Generation of Hybrid Solid-State Electrolytes
No full textThis work introduces the polymeric eutectogel (P-ETG) solid composite electrolytes (SCEs) developed from the encapsulation of a liquid deep eutectic solvent (DES) electrolyte within a solid amide-based polymer backbone. Compared to their silica-based eutectogel counterparts, the P-ETGs can be efficiently processed by means of UV curing from liquid precursors and possess superior mechanical flexibility. The P-ETGs are characterized by a good electrochemical stability (up to 4.5 V vs Li) and high ionic conductivity up to 0.78 mS cm(-1). The potentiality of P-ETG for application in Li/Li-ion batteries is substantiated by stable cycling results of Li/P-ETG/LiFePO4 cells over 100 cycles at C/5 to 1C rates. The fire-hazards analysis reveals the improved safety of P-ETGs in contrast to the conventional liquid electrolytes (1 M LiPF6 in EC/DEC).B.J. was a Ph.D. research fellow of the Research Foundation Flanders (FWO Vlaanderen) for the duration of the conducted research and now a researcher at Hasselt University. This project receives the support of the European Union, the European Regional Development Fund ERDF [project 936], Flanders Innovation & Entrepreneurship, and the Province of Limburg. The authors thank A. Kelchtermans for help with the flammability tests, W. Maes for the use of the N2 glovebox and (ATR-)FT-IR setup, and W. Marchal, P. Samyn, and R. Carleer and group members for the many discussions on the (ATR-)FT-IR and TGA measurements.Joos, B; Hardy, AT (corresponding author), Hasselt Univ, B-3500 Hasselt, Belgium.
[email protected]; [email protected]
WAFB Newsreel August 3, 1977
No full text08.03.77.2 (On hard drive 4)(00:01- 01:06) Opening of the Acadian Women's Clinic is the first to provide abortion in Baton Rouge (01:07- 02:37)Local neighborhood demands sheriffs control speeders in a dangerous area (02:38-03:38) Fire Chief discusses women on the force and in the training academy (03:39-04:42) Black eyed Susan's (04:43-07:29) Tennis tournament at LSU. Edwin Edwards and Bjorn Borg (07:30-07:39) Teaser clips (07:40- 08:07)Tennis (08:08-08:29) Funding teacher pay raises by raising corporate taxes (08:30-08:51)Local neighborhood demands sheriffs control speeders in a dangerous area, most people ticketed live in the neighborhood (08:52-09:34) District Attorney Ossie Brown opposes easing up on marijuana laws despite President Carter's opinion (09:35- 09:59)Legislative special sessio
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