Sökresultat

Filtyp

Din sökning på "*" gav 529763 sökträffar

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

The reliable and regular modification of the surface properties of substrates plays a crucial role in material research and the development of functional surfaces. A key aspect of this is the development of the surface pores and topographies. These can confer specific advantages such as high surface area as well as specific functions such as hydrophobic properties. Here, we introduce a combination

High impedance Josephson junction resonators in the transmission line geometry

In this article, we present an experimental study of microwave resonators made out of Josephson junctions. The junctions are embedded in a transmission line geometry so that they increase the inductance per length for the line. By comparing two devices with different input/output coupling strengths, we show that the coupling capacitors, however, add a significant amount to the total capacitance of

Time–Frequency Signatures of Electronic Coherence of Colloidal CdSe Quantum Dot Dimer Assemblies Probed at Room Temperature by Two-Dimensional Electronic Spectroscopy

Electronic coherence signatures can be directly identified in the time–frequency maps measured in two-dimensional electronic spectroscopy (2DES). Here, we demonstrate the theory and discuss the advantages of this approach via the detailed application to the fast-femtosecond beatings of a wide variety of electronic coherences in ensemble dimers of quantum dots (QDs), assembled from QDs of 3 nm in d

Extending dynamic vegetation models to simulate range shifts

In response to rapid climate change and increasing human pressure, a wide variety of taxa have shifted their distribution in the past decades (range shift), with important consequences for ecosystem services and human health and economy. However, it is not yet clear whether most species will be able to track their favourable habitats or lag behind the climate signal (migration lag). Studying the p

Impact of previous diverticulitis on 5-year survival and recurrence rates in patients with colorectal cancer

BACKGROUND: Diverticulitis and colorectal cancer (CRC) share epidemiological characteristics, but their relationship remains unknown. It is unclear if prognosis following CRC differ for patients with previous diverticulitis compared to those with sporadic cases and patients with inflammatory bowel disease or hereditary syndromes.AIM: The aim was to determine 5-year survival and recurrence after co

Granskning av pedagogisk skicklighet – utmaningar för sakkunniga

Bedömning av pedagogisk och vetenskaplig skicklighet ska göras med lika stor omsorg vidtjänstetillsättningar. Trots att detta har varit lagstadgat i Sverige sedan 1960-talet visar forskningatt det finns utmaningar förknippade med granskning av pedagogisk skicklighet. Svårigheten attgöra kvalificerade bedömningar gäller inte bara vid anställning och befordran. De allt vanligaresystemen för belöningAssessment of teaching and scientific competence should be done with equal care at appointments. Despite the fact that this has been legislated in Sweden since the 1960s, research shows that there are challenges associated with reviewing teaching portfolios. The difficulty in making qualified judgments does not only apply to hiring and promotion. As systems for awarding pedagogical competence at S

Investigating Low-Rank Approximations for the Finite Element-Boundary Integral Method

This paper explores acceleration of the finite element-boundary integral hybrid method using the adaptive cross approximation. Our code implementing the hybrid method in Python based on open source packages is briefly presented. A simple one-level version of the adaptive cross approximation is described and it is used to accelerate the boundary integral matrices. We present results for scattering

The economic well-being of nations is associated with positive daily situational experiences

People in economically advantaged nations tend to evaluate their life as more positive overall and report greater well-being than people in less advantaged nations. But how does positivity manifest in the daily life experiences of individuals around the world? The present study asked 15,244 college students from 62 nations, in 42 languages, to describe a situation they experienced the previous day

Effect of frequency and load on efficiency of inductive wireless power transfer systems

Wireless charging of smartphones using inductive wireless power transfer (IWPT) has become very popular. However, the efficiency of IWPT systems can decrease substantially when the transmitting and receiving coils are not closely coupled. One popular approach to mitigate the efficiency degradation is to utilize higher frequency. However, the higher efficiency is only achieved at a specific range o

Biomedical Research, Medicine, and Disease

Biomedical research is the first step towards the creation of new medications and treatments that help to manage different types of health conditions and diseases. The prevention and cure of diseases would be practically impossible without such type of research. Although the drug discovery and development processes are far too costly, time-consuming, prone to failure, and have low success rate, to

Learning by Doing : Controlling a Dynamical System using Causality, Control, and Reinforcement Learning

Questions in causality, control, and reinforcement learning go beyond the classical machine learning task of prediction under i.i.d. observations. Instead, these fields consider the problem of learning how to actively perturb a system to achieve a certain effect on a response variable. Arguably, they have complementary views on the problem: In control, one usually aims to first identify the system

The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products? : Astronomy and Astrophysics

Context. The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100 000 stars, including large representative samples of the stellar populations in the Galaxy, and a well-defined sample of 60 (plus 20 archive) open clusters. We provide internally consistent results calibrated on benchmark stars and star clusters, ex

Clinical insights into small cell lung cancer : Tumor heterogeneity, diagnosis, therapy, and future directions

Small cell lung cancer (SCLC) is characterized by rapid growth and high metastatic capacity. It has strong epidemiologic and biologic links to tobacco carcinogens. Although the majority of SCLCs exhibit neuroendocrine features, an important subset of tumors lacks these properties. Genomic profiling of SCLC reveals genetic instability, almost universal inactivation of the tumor suppressor genes TP5

Searching for Dark Matter with the ATLAS Detector

Dark matter’s presence can be inferred from gravitational interactions and astrophysical observations, but its nature is still unknown. If dark matter is a particle, then we hope to complement these observations from space and understand its nature and interactions by producing it in controlled laboratory conditions. The Large Hadron Collider (LHC), hosted at the CERN laboratory in Switzerland, pr

The Imperative of Crisis : Power, Knowledge and Action in the Swedish Crisis Management System

This thesis investigates Swedish crisis management. This thesis aims to contribute to crisis research by providing critical perspectives on the role of knowledge in crisis management settings. The papers in this thesis stem from empirical studies of the major cases of Swedish crisis management during the last decade, including the Swedish refugee crisis in 2015, the wildfires in 2018, and the Covi

Occupational noise exposure and acute effects on pulse rate and blood pressure

Environmental exposure to noise and particle matter (PM) are risk factors for cardiovascular disease (CVD). Although there are often higher levels in occupational settings, little is known about noise and particle exposures at work and CVD risks. We investigated occupational noise and particle exposures and acute effects on pulse rate and blood pressure. 46 active, non-smoking, male construction w

A Planar Metasurface Cloaked Dipole Antenna Designed for Multifunction Apertures

We designed and simulated a 1 GHz planar dipole antenna that is cloaked in a band around 10 GHz. Relative to an uncloaked antenna it has a reduced extinction cross-section for the co-antenna polarization, at the cost of an increased cross-polarization. This reduced extinction cross-section characterizes a reduction in scattering and absorption, and so reduced interference to electromagnetic waves