6,516 results match your criteria: "Aalto University.[Affiliation]"

New Vistas for the Relationship between Empathy and Political Ideology.

eNeuro

November 2024

Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo 02150, Finland

The study of ideological asymmetries in empathy has consistently yielded inconclusive findings. Yet, until recently these inconsistencies relied exclusively on self-reports, which are known to be prone to biases and inaccuracies when evaluating empathy levels. Very recently, we reported ideological asymmetries in cognitive-affective empathy while relying on neuroimaging for the first time to address this question.

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Transport effects of twist-angle disorder in mesoscopic twisted bilayer graphene.

Nanotechnology

November 2024

International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland.

Magic-angle twisted bilayer graphene (TBG) is a tunable material with remarkably flat energy bands near the Fermi level, leading to fascinating transport properties and correlated states at low temperatures. However, grown pristine samples of this material tend to break up into landscapes of twist-angle domains, strongly influencing the physical properties of each individual sample. This poses a significant problem to the interpretation and comparison between measurements obtained from different samples.

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Background: Most current studies on COVID-19 have focused on the first weeks or months of the pandemic or have addressed specific diseases. The long-term effects of the COVID-19 pandemic on healthcare services are insufficiently understood. We analysed the long-term effects of the COVID-19 pandemic on outpatient healthcare utilisation in the full spectrum of diseases in Uusimaa, the capital region of Finland.

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Understanding of a Ni-Rich O3-Layered Cathode for Sodium-Ion Batteries: Synthesis Mechanism and Al-Gradient Doping.

Small

November 2024

Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, 02150, Finland.

O3-type NaNiMnCoO (NaNMC811) cathode active materials for sodium-ion batteries (SIBs), with a theoretical high specific capacity (∼ 187 mAh g), are in the preliminary exploration stage. This study comprehensively investigates NaNMC811 from multiple perspectives. For the first time, the phase evolution ( - - ) during the solid-state synthesis is systemically investigated, which elucidates in-depth the mechanisms of the thermal sodiation process.

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Phytosterols (CHO), also known as plant sterols and stanols, are valuable biomolecules with a variety of applications in the pharma, food, and cosmetics industries. Phytosterols are typically manufactured from vegetable oil and tall oil feedstocks through a cooling crystallization process. Depending on the feedstock used, the composition regarding individual phytosterols and phytostanols (saturated analogs of phytosterols), also varies to a large extent.

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Empathy enhances decoding accuracy of human neurophysiological responses to emotional facial expressions of humans and dogs.

Soc Cogn Affect Neurosci

November 2024

Department of Psychology, Faculty of Education and Psychology, University of Jyväskylä, PO Box 35, Jyvaskyla FI-40014, Finland.

Despite the growing interest in the nonhuman animal emotionality, we currently know little about the human brain processing of nonconspecific emotional expressions. Here, we characterized the millisecond-scale temporal dynamics of human brain responses to conspecific human and nonconspecific canine emotional facial expressions. Our results revealed generally similar cortical responses to human and dog facial expressions in the occipital cortex during the first 500 ms, temporal cortex at 100-500 ms and parietal cortex at 150-350 ms from the stimulus onset.

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Background: Catheter ablation is a well-established treatment to prevent atrial fibrillation (AF) and atrial flutter (AFL) recurrences and to relieve symptoms, whereas pacemaker implantation and atrioventricular node (AVN) ablation is used for rate control when medical therapy fails.

Aims: We investigated temporal trends and patient characteristics in catheter ablation procedures for AF, AFL and AVN in Finland between 2012-2018.

Methods: Finnish AntiCoagulation in Atrial Fibrillation (FinACAF) is a registry-based study including all patients with AF or AFL in Finland between 2012-2018.

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Simulated conformality of atomic layer deposition in lateral channels: the impact of the Knudsen number on the saturation profile characteristics.

Phys Chem Chem Phys

November 2024

School of Chemical Engineering, Department of Chemical and Metallurgical Engineering, Aalto University, P.O. Box 16100, FI-00076 AALTO, Finland.

Atomic layer deposition (ALD) is exceptionally suitable for coating complex three-dimensional structures with conformal thin films. Studies of ALD conformality in high-aspect-ratio (HAR) features typically assume free molecular flow conditions with Knudsen diffusion. However, the free molecular flow assumption might not be valid for real ALD processes.

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Neurophysiological evidence of motor contribution to vicarious affective touch.

Cereb Cortex

November 2024

School of Psychology, Faculty of Health, Liverpool John Moores University, Tom Reilly Building, Byrom Street, Liverpool L3 3AF, United Kingdom.

Understanding observed interpersonal touch, particularly the so-called affective touch targeting the CT fibers, is essential for social interactions. Research has documented that observing other people being touched activates the same cortical areas involved in direct tactile experiences. However, observing interpersonal touch also activates an inner simulation of the movements in the observer's motor system.

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Highly Charged Cellulose Nanocrystals via Electrochemical Oxidation.

Nano Lett

November 2024

Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16300, 00076 Aalto, Finland.

Due to their exceptional properties, cellulose nanocrystals (CNCs) have been proposed for various applications in sustainable materials science. However, state-of-the-art production methods suffer from low yields and rely on hazardous and environmentally harmful chemicals, representing a bottleneck for more widespread utilization of CNCs. In this study, we present a novel two-step approach that combines previously established HCl gas hydrolysis with electrochemical TEMPO oxidation.

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Phase separation drives the folding of recombinant collagen.

Int J Biol Macromol

December 2024

Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16100, FI-02150 Espoo, Finland. Electronic address:

Recombinantly produced collagens present a sustainable, ethical, and safe substitute for collagens derived from natural sources. However, controlling the folding of the recombinant collagens, crucial for replicating the mechanical properties of natural materials, remains a formidable task. Collagen-like proteins from willow sawfly are relatively small and contain no hydroxyprolines, presenting an attractive alternative to the large and post-translationally modified mammalian collagens.

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Photonic modes exhibiting a polarization winding akin to a vortex possess an integer topological charge. Lasing with topological charge 1 or 2 can be realized in periodic lattices of up to six-fold rotational symmetry-higher order charges require symmetries not compatible with any two-dimensional Bravais lattice. Here, we experimentally demonstrate lasing with topological charges as high as -5, +7, -17 and +19 in quasicrystals.

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CopyMix: Mixture model based single-cell clustering and copy number profiling using variational inference.

Comput Biol Chem

December 2024

Science for Life Laboratory, Tomtebodavägen 23, Solna, 171 65, Stockholm, Sweden; Department of Computer Science, KTH, Malvinas v 10, Stockholm, 114 28, Stockholm, Sweden.

Investigating tumor heterogeneity using single-cell sequencing technologies is imperative to understand how tumors evolve since each cell subpopulation harbors a unique set of genomic features that yields a unique phenotype, which is bound to have clinical relevance. Clustering of cells based on copy number data obtained from single-cell DNA sequencing provides an opportunity to identify different tumor cell subpopulations. Accordingly, computational methods have emerged for single-cell copy number profiling and clustering; however, these two tasks have been handled sequentially by applying various ad-hoc pre- and post-processing steps; hence, a procedure vulnerable to introducing clustering artifacts.

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Pastures, on which ruminant livestock graze, occupy one third of the earth's surface. Removing livestock from pastures can support climate change mitigation through carbon sequestration in regrowing vegetation and recovering soils, particularly in potentially forested areas. However, this would also decrease food and fiber production, generating a tradeoff with pasture productivity and the ruminant meat production pastures support.

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Article Synopsis
  • Handwriting recognition systems require both specialized hardware and software, and creating one with sustainable materials poses various challenges.
  • A new flexible and electrically conductive wood-derived hydrogel array is developed as a handwriting input panel, utilizing materials like lignin, polypyrrole, and polyacrylic acid.
  • The system achieves efficient handwritten recognition through a 5×5 signal matrix and simplified algorithms, potentially leading to future applications in wearable technology and healthcare devices.
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We show that the first nationwide mass vaccination campaign against measles increased educational attainment in the United States. Our empirical strategy exploits variation in exposure to the childhood disease across states right before the Measles Eradication Campaign of 1967-68, which reduced reported measles incidence by 90 percent within two years. Our results suggest that mass vaccination against measles increased the years of education on average by about 0.

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van der Waals heterostructures have emerged as an ideal platform for creating engineered artificial electronic states. While vertical heterostructures have been extensively studied, realizing high-quality lateral heterostructures with atomically sharp interfaces remains a major experimental challenge. Here, we advance a one-pot two-step molecular beam lateral epitaxy approach and successfully synthesize atomically well-defined 1T-VSe─1H-NbSe lateral heterostructures.

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Article Synopsis
  • - Mixed-linkage glucans (MLGs) in plant cell-walls and cereals have been shown to gel quickly when cleaved by a specific enzyme (endo-β-glucanase), creating a low molecular-weight product that has a repeating structure.
  • - Research employing various techniques (rheology, microscopy, and X-ray scattering) revealed that the behavior of the material shifts from being like typical polymers to a more organized fibrillar network during digestion.
  • - The findings suggest that gelation occurs not by strengthening self-assembly interactions, but by removing interactions that prevent the assembly of MLG, as indicated by structural changes observed during the study.
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Foaming and cross-linking of cellulose fibers using phytic acid.

Carbohydr Polym

January 2025

Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, Gothenburg 41296, Sweden; Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Aalto FI-00076, Finland. Electronic address:

Bio-based compounds have become the focus in the development of next-generation materials. The polyphosphated structure and availability of phytic acid has sparked an interest to understand its properties and apply it to making fire-retardant fabrics. However, its degradative effect on natural fibers sets limitations to its potential uses.

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Subnanometer Diameter Control in Nanotubes Self-Assembled via Consecutive Cyclization - Polymerization Processes.

Angew Chem Int Ed Engl

January 2025

Nanostructured Molecular Systems and Materials Group, Organic Chemistry Department, Universidad Autónoma de Madrid, 28049, Madrid, Spain.

Tubular self-assembled architectures are highly appealing supramolecular objects that participate in diverse essential biological processes. Controlling with precision their dimensions, and in particular their pore diameter, is a key objective to develop the full applied potential of these structures. Here, using a strategy that relies on the controlled supramolecular polymerization of Watson-Crick H-bonded macrocycles, we target the assembly of 3 sets of nanotubes in which pore diameter is finely controlled from 1.

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The controlled synthesis of 1D van der Waals (1D vdW) heterostructures, specifically single-walled carbon nanotubes encapsulated within boron nitride nanotubes (SWCNT@BNNT), presents a challenge due to an incomplete understanding of the factors influencing BNNT growth. This study investigates the growth yield of SWCNT@BNNT heterostructures produced using zeolite-supported SWCNT templates on SiO-coated Transmission Electron Microscopy (TEM) grids, which enable in situ synthesis and thorough evaluation of each step without compromising the nanotube structure. The high-resolution TEM analysis reveals a significant improvement in BNNT coverage on individual nanotubes, increasing from 9% to 42%, through optimization of the ammonia borane precursor amount.

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The paper presents a novel technique for quantifying trace metals in aerosol samples in real time. Airborne metals were continuously collected for one week near the Baltic Sea in Finland using a particle-into-liquid sampler (PILS). The collected liquid samples were analyzed for metals using micro-discharge optical emission spectroscopy (µDOES).

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Recent interest in dynamic sound localization models has created a need to better understand the head movements made by humans. Previous studies have shown that static head positions and small oscillations of the head obey Donders' law: for each facing direction there is one unique three-dimensional orientation. It is unclear whether this same constraint applies to audiovisual localization, where head movement is unrestricted and subjects may rotate their heads depending on the available auditory information.

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An Antagonistic Photovoltaic Memristor for Bioinspired Active Contrast Adaptation.

Adv Mater

December 2024

Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, Kowloon, 999077, P. R. China.

Machine vision systems that consist of cameras and image-processing components for visual inspection and identification tasks play a critical role in various intelligent applications, including pilotless vehicles and surveillance systems. However, current systems usually possess a limited dynamic range and fixed photoresponsivity, restricting their capability of gaining high-fidelity images when encoding a high-contrast scene. Here, it is shown that a photovoltaic memristor incorporating two antagonistic photovoltaic junctions can autonomously adjust its response to varying light stimuli, enabling the amplification of shadows and inhibition of highlight saturation.

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The Unthinkable Conclusion: Derek Parfit's Budding Antinatalism.

Camb Q Healthc Ethics

October 2024

Aalto University School of Business, PO Box 21210, FI-00076Aalto, Finland.

Derek Parfit famously opined that causing a person to exist with a life barely worth living can be wrong, although it is not wrong for that person. This conundrum is known as the nonidentity problem. Parfit also held that persons can, in a morally relevant sense, be caused to exist in the distant future by actions that make the agent a necessary condition for a person's existence.

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