12 research outputs found
First person - Gergo Szanda
No full textFirst Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping early-career researchers promote themselves alongside their papers. Gergo Szanda is the first author on 'Mitochondrial cAMP exerts positive feedback on mitochondrial Ca2+ uptake via the recruitment of Epac1', published in Journal of Cell Science. Gergo is an assistant professor and leads a group at Semmelweis University, Budapest, Hungary, investigating Ca2+ signaling and mitochondrial biology, and the role of endocannabinoids in metabolism. © 2018. Published by The Company of Biologists Ltd
Developing diverse ensemble architectures for automatic brain tumor classification
No full textBrain tumors pose a serious threat in our modern society, with a clear increase in global cases each year. Therefore, developing robust solutions that could automatically and reliably detect brain tumors in their early stages is of utmost importance. In our paper, we revisit the problem of building performant ensembles for clinical usage by maximizing the diversity of the member models during the training procedure. We present an improved, more robust, extended version of our framework and propose solutions that could be integrated into a Computer-Aided Diagnosis system to accurately classify some of the most common types of brain tumors: meningioma, glioma, and pituitary tumors. We show that the new framework based on the histogram loss can be seen as a natural extension of the former approach, as it also calculates the inner products of the latent vectors produced by each member to measure similarity, but at the same time, it also makes it possible to capture more complex patterns. We also present several variants of our framework to incorporate member models with varying dimensional feature vectors and to cope with imbalanced datasets. We evaluate our solutions on a clinically tested dataset of 3,064 T1-weighted contrast-enhanced magnetic resonance images and show that they greatly outperform other state-of-the-art approaches and the base architectures as well, achieving over 92% accuracy, 92% macro and weighted precision, 91% macro and 92% weighted F1 score, and over 90% macro and 92% weighted sensitivity. © The Author(s) 2024.L
Thompson isometries on positive operators: The 2-dimensional case
No full textIn this paper, a former result of the first author is completed. The structure is determined of all surjective isometries of the space of invertible positive operators on the 2-dimensional Hilbert space equipped with the Thompson metric or the Hilbert projective metric
APACS23
No full textA collection of manually annotated, digitized Pap smear images for recognizing cervical cancer in patients
Pixel-wise segmentation of cells in digitized Pap smear images
No full textAbstract A simple and cheap way to recognize cervical cancer is using light microscopic analysis of Pap smear images. Training artificial intelligence-based systems becomes possible in this domain, e.g., to follow the European recommendation to screen negative smears to reduce false negative cases. The first step for such a process is segmenting the cells. A large and manually segmented dataset is required for this task, which can be used to train deep learning-based solutions. We describe a corresponding dataset with accurate manual segmentations for the enclosed cells. Altogether, the APACS23 (Annotated PAp smear images for Cell Segmentation 2023) dataset contains about 37 000 manually segmented cells and is separated into dedicated training and test parts, which could be used for an official benchmark of scientific investigations or a grand challenge
The 12 principles of green membrane materials and processes for realizing the United Nations' sustainable development goals
No full textMembrane science and technology has the potential to considerably contribute to most of the United Nations' sustainable development goals. This technology has diverse applications, including in mining, water treatment, healthcare, and space. Membranes directly impact the three pillars of sustainability, namely, the economy, environment, and society. Membrane materials and processes must be developed in line with green chemistry and engineering principles. Herein, the 12 principles of green membrane materials and processes are introduced to encourage and guide scientists, engineers, and practitioners to design, explore, and implement membranes efficiently and sustainably. Moreover, the membrane waste management hierarchy is introduced, and the importance of each principle and priorities for future research are established.The author thanks the survey participants from the membrane community who took the time to contribute and provide feedback. A special thanks goes to Gergo Ignacz for helping with data visualization. The research reported in this publication was supported by the funding received from the King Abdullah University of Science and Technology (KAUST)
Topological charge distributions of an interacting two-spin system
No full textQuantum systems are often described by parameter-dependent Hamiltonians. Points in parameter space where two levels are degenerate can carry a topological charge. Here we theoretically study an interacting two-spin system where the degeneracy points form a nodal loop or a nodal surface in the magnetic parameter space, similarly to such structures discovered in the band structure of topological semimetals. Key results of our work are that (1) we determine the topological charge distribution along these degeneracy geometries and (2) we show that these nonpointlike degeneracy patterns can be obtained not only by fine-tuning but they can be stabilized by spatial symmetries. Since simple spin systems such as the one studied here are ubiquitous in condensed-matter setups, we expect that our findings, and the physical consequences of these nontrivial degeneracy geometries, are testable in experiments with quantum dots, molecular magnets, and adatoms on metallic surfaces.QRD/Kouwenhoven La
A Cloud-based Machine Learning Pipeline for the Efficient Extraction of Insights from Customer Reviews
No full textThe efficiency of natural language processing has improved dramatically with
the advent of machine learning models, particularly neural network-based
solutions. However, some tasks are still challenging, especially when
considering specific domains. In this paper, we present a cloud-based system
that can extract insights from customer reviews using machine learning methods
integrated into a pipeline. For topic modeling, our composite model uses
transformer-based neural networks designed for natural language processing,
vector embedding-based keyword extraction, and clustering. The elements of our
model have been integrated and further developed to meet better the
requirements of efficient information extraction, topic modeling of the
extracted information, and user needs. Furthermore, our system can achieve
better results than this task's existing topic modeling and keyword extraction
solutions. Our approach is validated and compared with other state-of-the-art
methods using publicly available datasets for benchmarking
L\u27educazione anglosassone che non ho mai ricevuto
No full textCome scrivere un saggio sulla letteratura? Davanti al giovane studioso di vent’anni fa si aprivano due strade: lo stile accademico, spesso fumoso e pieno di opache espressioni gergali (il gergo della filosofia, quello della scienza, quello della linguistica strutturale); e lo stile della pubblicistica anglosassone, più impressionistico, più legato a una personale esperienza di lettura, ma anche più onesto. Dopo aver assimilato, con fatica, il primo, l’autore di questo articolo ha cercato di avvicinarsi al secondo, riorientando le sue letture e il suo modo di scrivere. L’articolo riflette su questa evoluzione.
How to write an essay on literature? Twenty years ago, a young scholar in the humanities could follow two paths: the academic style, often airy and replete with opaque jargon expressions (those of philosophy, of science, of structural linguistics); and the style of Anglo-Saxon essay-writing, this being more impressionistic, more focused on a personal reading experience, and yet more honest. After having distressingly assimilated the former model, the author of this article has thrived to draw near the latter, reorienting both his readings and writing manner. In the following pages, he reflects on such evolution.
PAROLE CHIAVE
Saggistica anglosassone; Gore Vidal; Robert Silvers; riviste; «New York Review of Books»; feticci del pensiero; ideologie.Come scrivere un saggio sulla letteratura? Davanti al giovane studioso di vent’anni fa si aprivano due strade: lo stile accademico, spesso fumoso e pieno di opache espressioni gergali (il gergo della filosofia, quello della scienza, quello della linguistica strutturale); e lo stile della pubblicistica anglosassone, più impressionistico, più legato a una personale esperienza di lettura, ma anche più onesto. Dopo aver assimilato, con fatica, il primo, l’autore di questo articolo ha cercato di avvicinarsi al secondo, riorientando le sue letture e il suo modo di scrivere. L’articolo riflette su questa evoluzione.
How to write an essay on literature? Twenty years ago, a young scholar in the humanities could follow two paths: the academic style, often airy and replete with opaque jargon expressions (those of philosophy, of science, of structural linguistics); and the style of Anglo-Saxon essay-writing, this being more impressionistic, more focused on a personal reading experience, and yet more honest. After having distressingly assimilated the former model, the author of this article has thrived to draw near the latter, reorienting both his readings and writing manner. In the following pages, he reflects on such evolution.
PAROLE CHIAVE
Saggistica anglosassone; Gore Vidal; Robert Silvers; riviste; «New York Review of Books»; feticci del pensiero; ideologie.Come scrivere un saggio sulla letteratura? Davanti al giovane studioso di vent’anni fa si aprivano due strade: lo stile accademico, spesso fumoso e pieno di opache espressioni gergali (il gergo della filosofia, quello della scienza, quello della linguistica strutturale); e lo stile della pubblicistica anglosassone, più impressionistico, più legato a una personale esperienza di lettura, ma anche più onesto. Dopo aver assimilato, con fatica, il primo, l’autore di questo articolo ha cercato di avvicinarsi al secondo, riorientando le sue letture e il suo modo di scrivere. L’articolo riflette su questa evoluzione.
How to write an essay on literature? Twenty years ago, a young scholar in the humanities could follow two paths: the academic style, often airy and replete with opaque jargon expressions (those of philosophy, of science, of structural linguistics); and the style of Anglo-Saxon essay-writing, this being more impressionistic, more focused on a personal reading experience, and yet more honest. After having distressingly assimilated the former model, the author of this article has thrived to draw near the latter, reorienting both his readings and writing manner. In the following pages, he reflects on such evolution.
PAROLE CHIAVE
Saggistica anglosassone; Gore Vidal; Robert Silvers; riviste; «New York Review of Books»; feticci del pensiero; ideologie.Come scrivere un saggio sulla letteratura? Davanti al giovane studioso di vent’anni fa si aprivano due strade: lo stile accademico, spesso fumoso e pieno di opache espressioni gergali (il gergo della filosofia, quello della scienza, quello della linguistica strutturale); e lo stile della pubblicistica anglosassone, più impressionistico, più legato a una personale esperienza di lettura, ma anche più onesto. Dopo aver assimilato, con fatica, il primo, l’autore di questo articolo ha cercato di avvicinarsi al secondo, riorientando le sue letture e il suo modo di scrivere. L’articolo riflette su questa evoluzione.
How to write an essay on literature? Twenty years ago, a young scholar in the humanities could follow two paths: the academic style, often airy and replete with opaque jargon expressions (those of philosophy, of science, of structural linguistics); and the style of Anglo-Saxon essay-writing, this being more impressionistic, more focused on a personal reading experience, and yet more honest. After having distressingly assimilated the former model, the author of this article has thrived to draw near the latter, reorienting both his readings and writing manner. In the following pages, he reflects on such evolution.
PAROLE CHIAVE
Saggistica anglosassone; Gore Vidal; Robert Silvers; riviste; «New York Review of Books»; feticci del pensiero; ideologie
The atomic beam probe synthetic diagnostic in the COMPASS tokamak and its application in fusion plasmas
No full textThe atomic beam probe (ABP) is a beam diagnostic concept that opens opportunities in plasma edge measurements due to the sensitivity of the magnetic field and the high temporal resolution. The first ABP has been installed and is operating on the COMPASS tokamak. A new numerical toolset, which is the subject of this paper, was required to model the diagnostic to accurately detect the alkali beam. For further development and understanding of the diagnostic, this tool had to be designed to simulate different magnetic field configurations in a performance-efficient manner. The TAIGA synthetic diagnostic (TAIGA-SD), which was implemented with a massively parallel trajectory solver core that runs on graphic cards to support experiments, provides a better understanding of measurements and has opened opportunities for future applications. This paper presents the model concept with relevant physical processes and necessary simplifications. The submodules implemented or integrated into the synthetic diagnostic are explained and described, and their scopes of validity are highlighted. This includes the integration of RENATE-OD for the primary ionization radial distribution for lithium beams, as well as the implementation and verification of a combined electron impact and charge exchange ionization module for other alkaline beams, which is a new atomic physics solver. Calculations were performed to investigate the relation between magnetic field, electron density, and temperature perturbations. Further simulations were run to estimate beam attenuation due to secondary ionization. The utilization of the ABP synthetic diagnostic is demonstrated by comparing it with the measurements.This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200– EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. This work was co-funded by MEYS project LM2023045. The first author received an FI scholarship supported by the Ministry of Research and Universities of the Government of Catalonia and the European Social Fund related to the recent paper.Postprint (author's final draft
