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Modeling the morphology of self-assisted GaP nanowires grown by molecular beam epitaxy

The morphologies of self-assisted GaP nanowires grown by gas source MBE in regular arrays on silicon substrates are modeled by a kinetic equation for the nanowire radius versus the position along the nanowire axis. The most important growth parameter that governs the nanowire morphology is the V/III flux ratio. Sharpened nanowires with a stable radius equal to only 12 nm at a V/III flux ratio of 6

Impact of DOI in a Clinical SPECT/MRI System : A Simulation Study

A novel SPECT/MRI scanner has been modelled and tested here using Monte Carlo simulation software, SIMIND. The INSERT SPECT/MRI system faces challenges with event reconstruction due to photon depth of interaction. The novel SPECT system is subject to parallax errors due to its crystal size and slit aperture collimator. We present a simple measure of the DOI errors through SIMIND experiments; by mo

Executive functions in birds

Executive functions comprise of top-down cognitive processes that exert control over information processing, from acquiring information to issuing a behavioral response. These cogni- tive processes of inhibition, working memory, and cognitive flexibility underpin complex cognitive skills, such as episodic memory and planning, which have been repeatedly investigated in several bird species in recen

Monte Carlo simulations of the GE discovery alcyone CZT SPECT system

Compact SPECT systems with cadmium zinc telluride (CZT) solid-state detectors with improved energy resolution and shorter acquisition times have recently been introduced. These systems have, however, different energy characteristics compared to NaI(Tl) crystal-based cameras. There is therefore a need to develop new simulation models for these cameras. We modeled the charge transport within the CZT

Hematological Toxicity in Mice after High Activity Injections of 177Lu-PSMA-617

Prostate cancer (PC) is one of the most common malignancies affecting men, with poor prognosis after progression to metastatic castration-resistant prostate cancer (mCRPC). Radioligand therapy (RLT) targeting the overexpressed PSMA on PC cells, with, e.g., 177Lu-PSMA-617, has been effective in reducing tumor burden and prolonging survival in mCRPC. However, it is not a curative method with kidney

Hormone-sensitive lipase is localized at synapses and is necessary for normal memory functioning in mice

Hormone-sensitive lipase (HSL) is mainly present in adipose tissue where it hydrolyses diacylglycerol. Although expression of HSL has also been reported in the brain, its presence in different cellular compartments is uncertain, and its role in regulating brain lipid metabolism remains hitherto unexplored. We hypothesized HSL might play a role in regulating the availability of bioactive lipids nec

Intergroup Threat and Affective Polarization in a Multi-Party System

What explains affective polarization among voters and societal groups? Much of the existing literature focusing on mass political polarization in modern democracies originates in the US, where studies have shown that, while ideological separation has grown, political conflict increasingly reflects social identity divisions rather than policy disagreements, resulting in affective polarization. We f

The Politics of Legislative Debates : An Introduction

The contribution of this chapter to our volume is fourfold. First, we look at why we should study legislative debates and how scholars may benefit from representation, legislative politics, party politics, and electoral studies by incorporating debates in their analysis. In so doing, we unpack their functions in liberal democracies. Second, the chapter offers a state of the art of the burgeoning f

Sweden : Biased Debate Participation with Nearly Equal Gender Representation

The Swedish Riksdag is often regarded as an ideal type for Scandinavian or Nordic parliamentarism. This relates to institutional features and party cohesion, but more often so to descriptive representation in terms of gender—an aspect where Sweden's parliament has consistently occupied the top position among European parliaments during the last decades. However, and despite an unlikely-case-char