3,376 results match your criteria: "National Technical University Of Athens[Affiliation]"

A search for the exclusive hadronic decays W^{±}→π^{±}γ, W^{±}→K^{±}γ, and W^{±}→ρ^{±}γ is performed using up to 140  fb^{-1} of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of sqrt[s]=13  TeV. If observed, these rare processes would provide a unique test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders. Additionally, at future colliders, these decays could offer a new way to measure the W boson mass through fully reconstructed decay products.

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The first search for the Z boson decay to ττμμ at the CERN LHC is presented, based on data collected by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138  fb^{-1}. The data are compatible with the predicted background. For the first time, an upper limit at the 95% confidence level of 6.

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Article Synopsis
  • - The ATLAS experiment at the LHC conducted a search for long-lived particles (LLPs) using a large dataset (140 fb^{-1}) from proton-proton collisions at 13 TeV, focusing on LLPs with masses from 5 to 55 GeV that decay within the inner detector.
  • - The study considered scenarios where LLPs are produced from exotic Higgs boson decays and models involving axionlike particles (ALPs).
  • - No significant findings above expected background levels were detected, leading to the establishment of upper limits on various production rates involving the Higgs boson and the top quark related to LLPs and ALPs.
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The aim of this study is to review the available knowledge concerning the use of artificial Intelligence (AI) in general in different areas of Forensic Sciences from human identification to postmortem interval estimation and the estimation of different causes of death. This paper aims to emphasize the different uses of AI, especially in Forensic Medicine, and elucidate its technical part. This will be achieved through an explanation of different technologies that have been so far employed and through new ideas that may contribute as a first step to the adoption of new practices and to the development of new technologies.

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Accurate Modelling of AFM Force-Indentation Curves with Blunted Indenters at Small Indentation Depths.

Micromachines (Basel)

September 2024

Cancer Mechanobiology and Applied Biophysics Group, School of Sciences, European University Cyprus, 2404 Nicosia, Cyprus.

When testing biological samples with atomic force microscopy (AFM) nanoindentation using pyramidal indenters, Sneddon's equation is commonly used for data processing, approximating the indenter as a perfect cone. While more accurate models treat the AFM tip as a blunted cone or pyramid, these are complex and lack a direct relationship between applied force and indentation depth, complicating data analysis. This paper proposes a new equation derived from simple mathematical processes and physics-based criteria.

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This paper addresses the critical and urgent need to reduce food losses and waste (FLW) resulting from stringent marketing standards. It proposes a comprehensive and actionable framework grounded in the three pillars of sustainability-environmental, economic, and social-to effectively evaluate FLW across the entire food supply chain. The paper involves a thorough review of existing marketing standards, including research on FLW due to marketing standards, and proposes the implementation of targeted key actions within four key food sectors: fruits, vegetables, dairy, and cereals.

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Effects of Ultrasound on Reactive Crystallization and Particle Properties of an Aromatic Amine in Batch and Continuous modes.

Ultrason Sonochem

December 2024

Department of Chemical Engineering, Process Engineering for Sustainable Systems, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium. Electronic address:

Ultrasound has shown its benefits in the manufacturing processes of many pharmaceuticals and fine chemicals. This study focused on the reactive crystallization system of an aromatic amine and explored the potential uses of ultrasound in both batch and continuous modes. In batch experiments, we studied the effects of different sonication conditions including power, duration, and starting point on final particle properties.

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Background: There is an emerging need for evidence-based approaches harnessing large amounts of health care data and novel technologies (such as artificial intelligence) to optimize public health policy making.

Objective: The aim of this review was to explore the data analytics tools designed specifically for policy making in noncommunicable diseases (NCDs) and their implementation.

Methods: A scoping review was conducted after searching the PubMed and IEEE databases for articles published in the last 10 years.

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The rapid proliferation of wireless technologies in everyday environments demands the quick and precise estimation of electromagnetic field distribution. This distribution is commonly depicted through the electric field strength across various geographical areas. The objective of this research is to determine the most effective geospatial model for generating a national-level electric field strength map within the 30 MHz-6 GHz frequency range.

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Article Synopsis
  • - The study aimed to assess the mechanical properties of Clear Aligners after they were used in the mouth for various lengths of time (7, 10, and 14 days) and compare them to new, unused aligners.
  • - Researchers analyzed 32 aligners from four patients, conducting tests to measure elastic modulus, ultimate tensile stress (UTS), yield stress, and hardness, resulting in 96 samples and 16 samples of the raw material used for manufacturing.
  • - Findings revealed that the mechanical properties of the processed aligners significantly decreased over time, while the unprocessed material consistently showed superior properties, indicating that the manufacturing and aging processes negatively impact aligner performance.
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Ultrasound mechanisms and their effect on solid synthesis and processing: a review.

Chem Soc Rev

January 2025

KU Leuven, Department of Chemical Engineering, Celestijnenlaan 200F, 3001 Leuven, Belgium.

Ultrasound proves to be an effective technique for intensifying a wide range of processes involving solids and, as such, is often used to improve control over both solids formation and post-treatment stages. The intensifying capabilities of ultrasonic processing are best interpreted in the context of the chemical, transport, and mechanical effects that occur during sonication. This review presents an overview of how ultrasound influences the processing and synthesis of solids across various material classes, contextualized within an ultrasound effect framework.

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Using proton-proton collision data corresponding to an integrated luminosity of collected by the CMS experiment at , the decay is observed for the first time, with a statistical significance exceeding 5 standard deviations. The relative branching fraction, with respect to the decay, is measured to be , where the first uncertainty is statistical, the second is systematic, and the third is related to the uncertainties in and .

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A search for collective effects inside jets produced in proton-proton collisions is performed via correlation measurements of charged particles using the CMS detector at the CERN LHC. The analysis uses data collected at a center-of-mass energy of sqrt[s]=13  TeV, corresponding to an integrated luminosity of 138  fb^{-1}. Jets are reconstructed with the anti-k_{T} algorithm with a distance parameter of 0.

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Article Synopsis
  • The study investigates the associated production of Higgs and W bosons, focusing on how the relative signs of the Higgs couplings to W and Z bosons impact the process.
  • Two specific searches were conducted using large amounts of collision data from the LHC to analyze different coupling scenarios: one for opposite-sign couplings and another for same-sign (standard model-like) couplings.
  • The results significantly exclude the opposite-sign coupling hypothesis and set a strict upper limit on the production rate of this process compared to standard model predictions.
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Case specific: Addressing co-digestion of wastewater sludge, cheese whey and cow manure: Kinetic modeling.

Heliyon

October 2024

Department of Environmental Civil Engineering / Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, SI-1000, Ljubljana, Slovenia.

The study investigated the methane production efficiency in a semi-continuous laboratory experiment with periodic feeding of wastewater sludge (WWS) as primary substrate and addition of whey (CW) and cow manure (CM). The short-term behavior of a real-scale anaerobic digester with WWS and the methane production improvements with different feeding mixtures of WWS, CW and CM were addressed. Gradual addition of CW to WWS (WWS:CW:CM = 70:20:0 to 70:55:0) increased the average daily methane production to 48.

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Article Synopsis
  • The study examines the CO adsorption capacity and CO/N selectivity of Supported Ionic Liquid-Phase adsorbents (SILPs), focusing on the new "Inverse SILPs" with ZIF-8, ZIF-69, and ZIF-70 matrices and various ionic liquids (ILs).
  • It aims to clarify the interaction between ILs and ZIFs, particularly how ILs can enhance CO absorption as opposed to the previously held belief that ILs completely fill ZIF pores.
  • The findings suggest that a thin IL layer on ZIF surfaces creates a barrier for nitrogen, leading to misinterpretations of adsorption capacities as solely related to the IL mass, demonstrating that some pores may be inaccessible for CO due to this film.
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Article Synopsis
  • Esophageal cancer has a poor outlook and requires a team-based approach for diagnosis and treatment, utilizing advanced methods like high-definition endoscopy and pathology confirmation for accurate diagnosis.
  • * Recent advancements in artificial intelligence, specifically deep learning, show promise in aiding endoscopists by improving accuracy in detecting pre-cancerous conditions and minimizing unnecessary procedures.
  • * This manuscript reviews recent studies on deep learning in esophageal cancer management and provides guidance for clinicians on its application, evaluation metrics, and limitations in image analysis.
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Induction Heating of Laminated Composite Structures with Magnetically Responsive Nanocomposite Interlayers for Debonding-on-Demand Applications.

Polymers (Basel)

September 2024

Research Lab of Advanced, Composite, Nano-Materials and Nanotechnology (R-NanoLab), School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou, GR-15780 Zografou, Greece.

In the present study, the feasibility to achieve localized induction heating and debonding of multi-material composite structures is assessed in testing coupons prepared by Automated Fiber Placement (AFP) and extrusion-based additive manufacturing (AM) technologies. Nano-compounds of Polyether-ketone-ketone (PEKK) with iron oxide nanoparticles acting as electromagnetic susceptors have been processed in a parallel co-rotating twin-screw extruder to produce filament feedstock for extrusion-based AM. The integration of nanocomposite interlayers as discrete debonding zones (DZ) by AFP-AM manufacturing has been investigated for two types of sandwich-structured laminate composites, i.

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High electrical conductivity, along with high piezoresistive sensitivity and stretchability, are crucial for designing and developing nanocomposite strain sensors for damage sensing and on-line structural health monitoring of smart carbon fiber-reinforced polymer (CFRP) composites. In this study, the influence of the geometric features and loadings of carbon-based nanomaterials, including reduced graphene oxide (rGO) or carbon nanofibers (CNFs), on the tunable strain-sensing capabilities of epoxy-based nanocomposites was investigated. This work revealed distinct strain-sensing behavior and sensitivities (gauge factor, GF) depending on both factors.

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Mining, refining, and QSAR analysing the nanoinformatics in EPA NaKnowBase.

Environ Sci Nano

April 2024

Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, 109 T.W. Alexander Drive, Research Triangle Park, NC 27711, USA.

Article Synopsis
  • - Concerns over the safety of engineered nanomaterials (ENMs) are rising as their use expands, prompting the need for research into their potentially harmful effects.
  • - The US EPA's Office of Research and Development created NaKnowBase (NKB), a database that compiles data from various studies on the environmental health and safety impacts of ENMs.
  • - The article details a study that uses quantitative structure-activity relationship (QSAR) analysis and a decision tree method to predict the effects of ENMs on cell viability, with validation through the Jaqpot cloud platform for global collaboration.
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  • The study explored the use of the HOLOBalance platform, which employs augmented reality holograms for providing multisensory physiotherapy to older adults at risk of falls.
  • A pilot randomised controlled trial showed that the platform was safe, feasible, and well-accepted, with 69% of participants recommending it.
  • Participants demonstrated significant improvements in functional gait and balance (measured through FGA and Mini BESTest), outperforming the traditional OTAGO programme.
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Background: The current evidence-based systematic review with meta-analysis presents a detailed overview of the cystic artery (CA) surgical anatomy, including its origin, number, topography, and morphometry. Moreover, the surgical implications of these variants are further discussed.

Methods: According to the Evidence-Based Anatomy Workgroup and PRISMA 2020 guidelines, the systematic review was performed using four online databases.

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Elucidating Thermothielavioides terrestris secretome changes for improved saccharification of mild steam-pretreated spruce.

Biotechnol Biofuels Bioprod

October 2024

Division of Industrial Biotechnology, Department of Life Sciences, Chalmers University of Technology, Kemivägen 10, 412 96, Gothenburg, Sweden.

Article Synopsis
  • The study investigates how the fungus Thermothielavioides terrestris LPH172 interacts with different types of steam-pretreated spruce materials and untreated biomass, exploring how these substrates influence the production of enzymes in the fungus.
  • Results show that the type of spruce material affects the expression of specific enzymes, with higher levels of mannanases produced when grown on certain pretreated materials compared to untreated biomass.
  • Supplementing standard commercial enzyme mixtures with the secretome from T. terrestris significantly enhanced the efficiency of mannose release from treated spruce, indicating its potential to improve biorefinery processes.
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Unlabelled: The topic of pricing non-convexities in power markets has been explored vividly in the literature and among practitioners for the past twenty years. The debate has been focused on indivisibilities in short-term auctions, the computational tractability of some pricing proposals, and the economic analysis of their behavior. In this paper, we analyse a source of non-convexities that is not discussed as broadly: the indivisibilities in investment decisions.

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Purpose: The elongated styloid process (SP) is associated with internal carotid artery (ICA) dissection, due to its close relationship with the vessel. However, the relationship with the variable ossified stylohyoid chain (SHC) has been scarcely studied. The current study investigated the relationship between the temporal bone's SP and the external and internal carotid arteries (ECA and ICA).

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