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Background: Computed tomography (CT) scans are routinely performed in positron emission tomography (PET) and single photon emission computed tomography (SPECT) examinations globally, yet few surveys have been conducted to gather national diagnostic reference level (NDRL) data for CT radiation doses in positron emission tomography/computed tomography (PET/CT) and single photon emission computed tom
In this paper, we study event-based PID control from an optimal stochastic control perspective. The purpose is to better understand what implementation features are critical for achieving good event-based PID performance. For this end, we formulate an LQG control design problem for a double integrator process with an integral disturbance, where the solution is an ideal PID controller. We then cons
A technique for scalable spray coating of colloidal CdSeTe quantum dots (QDs) for photovoltaics and photodetector applications is presented. A mixture solvent with water and ethanol was introduced to enhance the adhesive force between QDs and the substrate interface. The performance of the detector reached the highest values with 40 spray coating cycles of QD deposition. The photodetectors without
Groundwater is an important source to supply drinking water demands in both arid and semi-arid regions. Nevertheless, locating high quality drinking water is a major challenge in such areas. Against this background, this study proceeds to utilize and compare five decision tree-based data mining algorithms including Ordinary Decision Tree (ODT), Random Forest (RF), Random Tree (RT), Chi-square Auto
Humans learn new concepts extremely fast. One or two examples of a new concept are often sufficient for us to grasp its meaning. Traditional theories of concept formation, such as symbolic or connectionist representations, have problems explaining the quick learning exhibited by humans. In contrast to these representations, I advocate a third form of representing categories, which employs geometri
Linguistic awareness is seen as a development of linguistic abilities beyond what is needed for speech perception and production. According to another way of thinking, linguistic awareness is closely tied to cognitive development and reflects the change in cognitive functioning that is observed in children during middle childhood, approximately from four to eight years of age. Several suggestions
We have recently completed the largest GWAS on lung cancer including 29,266 cases and 56,450 controls of European descent. The goal of our study has been to integrate the complete GWAS results with a large-scale expression quantitative trait loci (eQTL) mapping study in human lung tissues (n = 1,038) to identify candidate causal genes for lung cancer. We performed transcriptome-wide association st
Background: In collaboration with United European Gastroenterology, the working group on ‘Harmonizing diagnosis and treatment of chronic pancreatitis across Europe’ (HaPanEU) developed European guidelines for the management of chronic pancreatitis using an evidence-based approach. Methods: Recommendations of multidisciplinary review groups based on systematic literature reviews to answer predefine
Review of a doctoral dissertation in film art (artistic research), consisting of a written treatise as well as a filmic work, by filmmaker Patrik Eriksson (Göteborgs universitet/Gothenburg University).Review of a doctoral dissertation in film art (artistic research), consisting of a written treatise as well as a filmic work, by filmmaker Patrik Eriksson (Göteborgs universitet/Gothenburg University).
Putin lever inte för evigt, men dagens Ryssland är uppbyggt kring Putin som ledaren. Sovjettidens så kallade ”kremlologi” – att omvärlden spekulerar och ibland försöker tyda tecken som inte finns – kan märkas även i dag. Det är väldigt svårt att föreställa sig Ryssland om fem år, både för ryssar och för andra, skriver Mi Lennhag, Östeuropaexpert vid Lunds universitet och Vilhelm Konnander, säkerhe
The Routledge Companion to Media and Tourism provides a comprehensive overview of the research into the convergence of media and tourism and specifically investigates the concept of mediatized tourism.This companion offers a holistic look at the relationship between media and tourism by drawing from a global range of contributions by scholars from disciplines across the humanities and social scien
The sFLASH project at DESY is an experiment to study direct seeding using a source based on the high-harmonic generation (HHG) process. In contrast to SASE, a seeded FEL exhibits greatly improved longitudinal coherence and higher shot-to-shot stability (both spectral and energetic). In addition, the output of the seeded FEL is intrinsically synchronized to the HHG drive laser, thus enabling pump-p
Since 2004 the free-electron laser FLASH at DESY has been operated in the Self-Amplified Stimulated Emission mode (SASE), delivering gigawatt pulses with wavelengths between 6.5 nm and 40 nm in the femtosecond domain. In 2009 DESY installed an additional radiofrequency module for controlling the phase space of the electron bunches that gives the possibility to generate bunches with high peak curre
