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Modeling of material behavior in metal forming

Popular Abstract in Swedish Datorbaserade beräknings- och simuleringsmodeller har under de senaste två decennierna kommit att utgöra ett viktigt verktyg i industriella produktutvecklingsprocesser. Med sådana modeller och metoder kan utvecklingstiden kortas och kostnaderna minskas, till exempel genom att färre prototyper behöver framställas och genom att mängden kostsam provning kan reduceras. Bra With an increasing demand to improve efficiency and to cut costs, the industry is constantly seeking to reduce the time and money spent in product development and manufacturing. Use of computer-based simulations has become more or less a standard tool to meet this demand. Cost reduction is in this way made possible by for example shortened product development cycles, less need for expensive protot

An approach to remove the clutter and detect the target for ultra-wideband through-wall imaging

Through-wall imaging (TWI) is important from the point of view of rescue operations and surveillance. Several researchers have been working in this field but have still not obtained any concrete results. TWI using narrow band radar faces the problem of low resolution whereas ultra-wideband (UWB) radar provides better resolution, classification and low loss for the imaging signals. TWI faces many c

A rheological investigation of the complex formation between hydrophobically modified ethyl (hydroxy ethyl) cellulose and cyclodextrin

The thickening effect of a hydrophobically modified polymer in an aqueous solution is dependent on intermolecular hydrophobic associations, and if the polymer concentration is significantly above the overlap concentration also on chain entanglements. In this investigation we have added different cyclodextrins (CD) in order to decouple hydrophobic polymer-polymer associations via inclusion complex

The Multiple Streams Framework and the problem broker

John Kingdon's Multiple Streams Framework (MSF) constitutes a powerful tool for understanding the policy process, and more specifically, agenda-setting, through three separate streams: problems, policies and politics. This article argues that the MSF would benefit from further development of the problem stream. It introduces a clearer conception of agency into the problem stream by suggesting the

Uncertainty analysis in integrated assessment: the users’ perspective. Regional Environmental Change

Integrated Assessment (IA) models aim at providing information- and decision-support to complex problems. This paper argues that uncertainty analysis in IA models should be user-driven in order to strengthen science–policy interaction. We suggest an approach to uncertainty analysis that starts with investigating model users’ demands for uncertainty information. These demands are called “uncertaint

Ombyggnad pågår : Lunds tekniska högskola och ingenjörsrollens förändring

This study deals with the transformation of institutions of higher technical education in Sweden. It situates those processes in the context of educational reforms during the second half of the 20th century. Lund Institute of Technology, Lunds tekniska högskola (LTH), is focused upon. It was founded in 1961 as a major addition to the expanding higher education system. As a newly established instit

At the Tip of an MeV Beam: Provoking Cells and Performing Tomographic Imaging

Biological applications of ion beams have recently become a new important research field using single ion hit facilities to study individual living cells and their response to the hit of a counted number of ions. One motivation is the search for a better understanding of the fundamental processes taking place in cells and organs as a result of irradiation. Another comes from the increasing interes

Impact of the ion-ion energy transfer on quantum computing schemes in rare-earth doped solids

We analyze the Ce3+-Pr3+:Y2SiO5 emission spectra obtained under selective excitation of the two Ce3+ sites in Y2SiO5 and we show clear evidence of direct energy transfer from Ce3+ to Pr3+. Energy transfer microparameters were calculated from the experimental spectral overlap between the Ce3+ emission and the Pr3+ and Eu3+ absorptions from which, the transfer mechanisms Ce3+-> Pr3+ are concluded to

An improved high-order scheme for DNS of low Mach number turbulent reacting flows based on stiff chemistry solver

We present an improved numerical scheme for numerical simulations of low Mach number turbulent reacting flows with detailed chemistry and transport. The method is based on a semi-implicit operator-splitting scheme with a stiff solver for integration of the chemical kinetic rates, developed by Knio et al. [O.M. Knio, H.N. Najm, P.S. Wyckoff, A semi-implicit numerical scheme for reacting flow II. St

Microbial mobilization and immobilization of soil nitrogen

Popular Abstract in Swedish Alla levande organismer behöver kväve för att producera till exempel proteiner och DNA. I jorden förekommer kväve grovt indelat i två huvudformer, organiskt och oorganiskt. Mikroorganismer har förmågan att bryta ner det organiska kvävet till oorganiskt i en process som kallas för mineralisering. Växter tar i stort sett bara upp oorganiskt kväve och är beroende av den miMicroorganisms in forest ecosystems normally recycle nitrogen (N), such that gaseous losses and leaching are limited. Mobilization of organic N, including microbial N, and immobilization of inorganic N, especially NH4+, are the quantitatively most important N transformation processes. Various factors influence their rates, e.g. the amount of carbon and nitrogen, temperature, moisture, and the micr

A Tale of Two Clusters: Sharing Resources to Compete

“The death of distance” has become the battle cry of a modern generation of managers, policy makers and scientists who embrace the new globalized economy and its promise of frictionless exchange across the world. While highly influential, this view does not, however, stand unchallenged. Over the last 15 years, there has been a growing interest in the geographical clustering of industry. Well-known

Development and implementation of a standardized care plan for carotid endarterectomy.

Carotid endarterectomy (CEA) is a standardized surgical procedure and is the third most common vascular surgical procedure in Sweden. To improve the quality of pre- and postoperative care for patients undergoing elective CEA, a standardized care plan (SCP) was developed and implemented during Spring of 2007 at a vascular clinic in Sweden. In order to spread light on obstacles and possibilities in

Pretreatment of Lignocellulosic Materials for Efficient Bioethanol Production

Second-generation bioethanol produced from various lignocellulosic materials, such as wood, agricultural or forest residues, has the potential to be a valuable substitute for, or a complement to, gasoline. One of the crucial steps in the ethanol production is the hydrolysis of the hemicellulose and cellulose to monomer sugars. The most promising method for hydrolysis of cellulose to glucose is by

Pappersarbete : Formandet av och föreställningar om kontorspapper som medium

This thesis explores office paper as a medium between 1920 and 1960 in Sweden. During this period, paper was muchdebated due to the number of standards that were implemented. These standardstransformed paper, making it a modern medium in many different ways. The aim ofthe present thesis is to analyze how office paper was reshaped to solveproblems regarding production, reproduction, circulation and

Adapting a causality model of technical systems to represent socio-technical systems: A Case study from the BoP

The base of the world economic pyramid, generally called the base of the pyramid (BoP), consists of four billion people with average daily income of four dollars. Over the past several years, the design and development of products and services for BoP markets has been investigated by several authors from different disciplines. While some authors suggest a systems approach to design and develop pro

More than Rain - A modular rainwater harvesting solution.

This project documentation presents an overview of the design process of the master thesis of Elisabeth Langer and Lisa Laugs at Lund University, School of Industrial Design. The topic of the master thesis was rainwater harvesting, which was first explored through extensive research and analysis. This topic is highly relevant as several aspects such as population growth, urbanisation, and climate

Social manipulation i en straffrättslig kontext - beaktas mänskliga sårbarhetsfaktorer i den straffrättsliga bedömningen?

Genom att utnyttja generella socialpsykologiska mänskliga sårbarhetsfaktorer kan en gärningsperson manipulera en individ att lämna ifrån sig konfidentiell information. Utnyttjandet av mänsklig kontakt och förtroende i syfte att erhålla information kan företas med hjälp av informationsteknik eller genom en mer traditionell och humanistisk interaktion. Denna typ av utnyttjande benämns som social manBy utilizing general social psychological human vulnerability factors, an offender can manipulate an individual to disclose confidential information. The utilization of human contact and trust for the purpose of obtaining information can be done with the help of information technology or through traditional humanistic interaction. This type of exploitation is referred to as social engineering. The

Sustainability assessments of research projects: exploring the case of Sustainability Readiness Level (SRL)

Det finns ett ökat intresse för att förstå forskningens bidrag och roll i omställningen till ett mer hållbart samhälle. Hursomhelst karaktäriseras forskningsutvärdering och management av osäkerheter och en rad svårigheter, såsom balansen mellan långsiktiga och kortsiktiga projekt, inkrementella och disruptiva projekt m.m. Denna studie undersöker tvärsnittet mellan hållbarhetsbedömningar och forsknThis study explores the cross-section between sustainability assessment and research reviewing- and evaluation at an early development stage of emerging technical solutions´ by conducting a case study on Sustainability Readiness Level, a tool used in the application and reviewing process of the Strategic Innovation Programme (SIP) BioInnovation. The aim of the thesis is to gain a deeper understand