cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cellular traffic offloading via Opportunistic Networking with Reinforcement Learning
Creators: name: Valerio, Lorenzo
name: Bruno, Raffaele
name: Passarella, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The widespread diffusion of mobile phones is triggering an exponential growth of mobile data traffic that is likely to cause, in the near future, considerable traffic overload issues even in last-generation cellular networks. Offloading part of the traffic to other networks is considered a very promising approach and, in particular, in this paper, we consider offloading through opportunistic networks of users' devices. However, the performance of this solution strongly depends on the pattern of encounters between mobile nodes, which should therefore be taken into account when designing offloading control algorithms. In this paper, we propose an adaptive offloading solution based on the Reinforcement Learning framework and we evaluate and compare the performance of two well-known learning algorithms: Actor-Critic and Q-Learning. More precisely, in our solution the controller of the dissemination process, once trained, is able to select a proper number of content replicas to be injected into the opportunistic network to guarantee the timely delivery of contents to all interested users. We show that our system based on Reinforcement Learning is able to automatically learn a very efficient strategy to reduce the traffic on the cellular network, without relying on any additional context information about the opportunistic network. Our solution achieves a higher level of offloading with respect to other state-of-the-art approaches, in a range of different mobility settings. Moreover, we show that a more refined learning solution, based on the Actor-Critic algorithm, is significantly more efficient than a simpler solution based on Q-learning.
Tracing the Local Volume galaxy halo-to-stellar mass ratio with satellite kinematics
Creators: name: Karachentsev, Igor D.
name: Kashibadze, Olga G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Rapid advance has been made recently in accurate distance measurements for nearby ($D < 11$ Mpc) galaxies based on the magnitude of the tip of red giant branch stars resolved with the Hubble Space Telescope. We use observational properties of galaxies presented in the last version of Updated Nearby Galaxy Catalog to derive a halo mass of luminous galaxies via orbital motion of their companions. Our sample contains 298 assumed satellites with known radial velocities around 25 Milky Way-like massive galaxies and 65 assumed satellites around 47 fainter dominant galaxies. The average total mass-to-$K$-band luminosity ratio is $31\pm6 M_\odot/L_\odot$ for the luminous galaxies, increasing up to $\sim200 M_\odot/L_\odot$ toward dwarfs. The bulge-dominated luminous galaxies are characterized with $\langle{}M_T/L_K\rangle = 73\pm15 M_\odot/L_\odot$, while the disc-dominated spirals have $\langle{}M_T/L_K\rangle = 17.4\pm2.8 M_\odot/L_\odot$. We draw attention to a particular subsample of luminous spiral galaxies with signs of declining rotation curve, which have a radial velocity dispersion of satellites less than 55 km/s and a poor dark matter halo with $\langle{}M_T/L_K\rangle = 5.5\pm1.1 M_\odot/L_\odot$. We note that a fraction of quenched (dSph, dE) companions around Milky Way-like galaxies decreases with their linear projected separation as $0.75 \exp(-R_p/350\,\mathrm{kpc})$.
description: 20 pages, 8 figures, 7 tables. Accepted for publication in Astronomische Nachrichten
Expression and cellular localization of Copper transporter 2 (Ctr2) in Mus musculus
Creators: name: Cottignoli, Stefano <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: BIO/12 Biochimica clinica e biologia molecolare e clinica

description: The Ctr family is an essential part of the copper homeostasis machinery and its members share sequence homology and structural and functional features. 
Higher eukaryotes express two members of this family Ctr1 and Ctr2. 
Numerous structural and functional studies are available for Ctr1, the only high affinity Cu(I) transporter thus far identified. Ctr1 holigotrimers mediate cellular copper uptake and this protein was demonstrated to be essential for embryonic development and to play a crucial role in dietary copper acquisition.
Instead very little is known about Ctr2, it bears structural homology to the yeast vacuolar copper transporter, which mediates mobilization of vacuolar copper stores. Recent studies using over-expressed epitope-tagged forms of human Ctr2 suggested a function as a low affinity copper transporter that can mediate either copper uptake from the extracellular environment or mobilization of lysosomal copper stores.
Using an antibody that recognizes endogenous mouse Ctr2, we studied the expression and localization of endogenous mouse Ctr2 in cell culture and in mouse models to understand its regulation and function in copper homeostasis.  
By immunoblot we observed a regulation of mCtr2 protein levels in a copper and Ctr1 dependent way. Our observations in cells and transgenic mice suggest that lack of Ctr1 induces a strong downregulation of Ctr2 probably by a post-translational mechanism. 
By indirect immunofluorescence we observed an exclusive intracellular localization in a perinuclear compartment and no co-localization with lysosomal markers.
Immunofluorescence experiments in Ctr1 null cells, supported by sequence analysis, suggest that lysosomes may play a role in mCtr2 biology not as resident compartment, but as a degradation site. 

In appendix a LC-mass method for analysis of algal biotoxins belonging to the family of PsP (paralytic shellfish poisoning) is described.
L'interpretazione del contratto internazionale
The Interpretation of International Contracts
Creators: name: Vinci, Pierpaolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: IUS/01 Diritto privato

description: La ricerca ha ad oggetto l’analisi di clausole, contenute nei contratti del commercio internazionale, che sembrano finalizzate a fornire in anticipo una metodologia dell’interpretazione del contratto.
L’elaborato pertanto analizza i profili di validità ed efficacia di singole e specifiche clausole, come le “clausole d’intero accordo”, le “clausole di non modificazione orale”, le clausole contenenti definizioni, e simili, alla luce delle regole giudiriche di derivazione eteronoma applicabili al contratto, siano esse rappresentate da una legge nazionale, da una convenzione internazionale di diritto materiale uniforme, o da fonti ulteriori c.d. di soft law, come i Principi Unidroit sui contratti del commercio internazionale.
La ricerca ha pertanto rivelato che, diversamente da quanto possa apparire a prima vista, svariate tipologie di clausole analizzate non coinvolgono profili legati all'’nterpretazione del contratto, quanto piuttosto di documentazione e forma dello stesso.
L’elaborato contiene infine alcune considerazioni di teoria generale del diritto.
description: The reasearch focuses on the analysis of a number of clauses, contained in international commercial contracts, which seem aimed at providing in advance a methodology for the intepretation of the contract.
The study therefore analyzes the validity and efficacy of specific types of clauses, such as “entire agreement clauses”, “no oral modification clauses”, clauses containing definitions, and the like, in light of the rules of law applicable to the contract, being it a national law, an international convention of substantive law, or further rules of so-called soft law, such as the Unidroit Principles on international commercial contracts.
The research has therefore revealed that, contrary to what it may appear at first sight, a number of the above-mentioned clauses do not affect interpretation issues, whereas they rather involve issues of evidence and form of the contracts.
The study finally contains some preliminary observations on general theory of law.
Template Dissolution Interfacial Patterning of Single Colloids for Nanoelectrochemistry and Nanosensing
Creators: name: Lee, Joong Bum
name: Walker, Harriet
name: Li, Yi
name: Nam, Tae Won
name: Rakovich, Aliaksandra
name: Sapienza, Riccardo
name: Jung, Yeon Sik
name: Nam, Yoon Sung
name: Maier, Stefan A.
name: Cortés, Emiliano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Deterministic positioning and assembly of colloidal nanoparticles (NPs) onto substrates is a core requirement and a promising alternative to top down lithography to create functional nanostructures and nanodevices with intriguing optical, electrical, and catalytic features. Capillary-assisted particle assembly (CAPA) has emerged as an attractive technique to this end, as it allows controlled and selective assembly of a wide variety of NPs onto predefined topographical templates using capillary forces. One critical issue with CAPA, however, lies in its final printing step, where high printing yields are possible only with the use of an adhesive polymer film. To address this problem, we have developed a template dissolution interfacial patterning (TDIP) technique to assemble and print single colloidal AuNP arrays onto various dielectric and conductive substrates in the absence of any adhesion layer, with printing yields higher than 98%. The TDIP approach grants direct access to the interface between the AuNP and the target surface, enabling the use of colloidal AuNPs as building blocks for practical applications. The versatile applicability of TDIP is demonstrated by the creation of direct electrical junctions for electro- and photoelectrochemistry and nanoparticle-on-mirror geometries for single particle molecular sensing.
Portal hypertension: a comparison between portal-venous pressure measurement and ARFI measurement of liver and spleen stiffness
Creators: name: Borghi, Alberto <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: MED/09 Medicina interna

description: PURPOSE. Portal pressure is measured invasively as Hepatic Venous Pressure Gradient (HVPG) in the angiography room. Liver stiffness measured by Fibroscan was shown to correlate with HVPG values below 12 mmHg. This is not surprising, since in cirrhosis the increase of portal pressure is not directly linked with liver fibrosis and consequently to liver stiffness. We hypothesized that, given the spleen’s privileged location upstream to the whole portal system, splenic stiffness could provide relevant information about portal pressure. Aim of the study was to assess the relationship between liver and spleen stiffness measured by Virtual Touch™ (ARFI) and HVPG in cirrhotic patients. 
METHODS. 40 consecutive patients (30 males, mean age 62y, mean BMI=26, mean Child-Pugh A6, mean platelet count=92.000/mmc, 19 HCV+, 7 with ascites) underwent to ARFI stiffness measurement (10 valid measurements in right liver lobe both surface and centre, left lobe and 20 in the spleen) and HPVG, blindly to each other. Median ARFI values of 10 samplings on every liver area and of 20 samplings on spleen were calculated.
RESULTS. Stiffness could be easily measured in all patients with ARFI, resulting a mean of 2,61±0,76, 2,5±0,62 and 2,55±0,66 m/sec in the liver areas and 3.3±0,5 m/s in the spleen. Median HPVG was 14 mmHg (range 5-27); 28 patients showed values ≥10 mmHg. A positive significant correlation was found between spleen stiffness and HPVG values (r=0.744, p<0.001). No significant correlation was found between all liver stiffness and HVPG (p>0,05). AUROC was calculated to test spleen stiffness ability in discriminating patients with HVPG ≥10. AUROC = 0.911 was obtained, with sensitivity of 69% and specificity of 91% at a cut-off of 3.26 m/s. 
CONCLUSION. Spleen stiffness measurement with ARFI correlates with HVPG in patients with cirrhosis, with a potential of identifying patients with clinically significant portal hypertension.
title: Ecocistografía en la edad pediátrica: una nueva alternativa a la cistografía convencional para el estudio de la vía urinaria.
Creators: name: Repollés Cobaleda, Marta
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Cystography / Uretrography
subject: Ultrasound
subject: Urinary Tract / Bladder
subject: Paediatric

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
La ecocistografía es una prueba dinámica utilizada para el diagnóstico del reflujo vesicoureteral (RVU) y la afección uretral gracias a que permite el estudio de todo el tracto urinario introduciendo contraste ecográfico en la vejiga. Su...
Copper(I) phenanthroline complexes and
supramolecular systems containing fullerenes:
Photophysics, photochemistry and potential
applications in sustainable energy technologies.
Creators: name: Listorti, Andrea <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: CHIM/02 Chimica fisica
CHIM/03 Chimica generale e inorganica

description: Chemistry can contribute, in many different ways to solve the challenges we are facing to modify our inefficient and fossil-fuel based energy system. The present work was motivated by the search for efficient photoactive materials to be employed in the context of the energy problem: materials to be utilized in energy efficient devices and in the production of renewable electricity and fuels. 
We presented a new class of copper complexes, that could find application in lighting techhnologies, by serving as luminescent materials in LEC, OLED, WOLED devices. These technologies may provide substantial energy savings in the lighting sector. Moreover, recently, copper complexes have been used as light harvesting compounds in dye sensitized photoelectrochemical solar cells, which offer a viable alternative to silicon-based photovoltaic technologies. We presented also a few supramolecular systems containing fullerene, e.g. dendrimers, dyads and triads.The most complex among these arrays, which contain porphyrin moieties, are presented in the final chapter. They undergo photoinduced energy- and electron transfer processes also with  long-lived charge separated states, i.e. the fundamental processes to power artificial photosynthetic systems.
title: Optimal Ultrasound–Assisted Extraction of Concentrated Protein from Cricket Powder
Creators: name: Supasit Chooklin
Publisher: name: Research Administration Division
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Cricket powder
Freeze dryer
Nutraceutical property
Response surfacemethodology
Ultrasound-assisted extraction

description: Science & Technology Asia, 30, 1, 271-280
title: Evaluation of Genetic Diversity in Fourth- Generation Selective Breeding Lines of Pacific White Shrimp Using Microsatellites
Creators: name: Kittipat Ukoskit
Publisher: name: Research Administration Division
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Genetic variation
Microsatellite
Pacific white shrimp
Population structure

description: Science & Technology Asia, 30, 1, 281-289
Middleware principles and design for the integration of ubiquitos mobile services
Creators: name: Monti, Stefano <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: ING-INF/05 Sistemi di elaborazione delle informazioni

description: Nowadays, in Ubiquitous computing scenarios users more and more require to exploit online contents and services by means of any device at hand, no matter their physical location, and by personalizing and tailoring content and service access to their own requirements. The coordinated provisioning of content tailored to user context and preferences, and the support for mobile multimodal and multichannel interactions are of paramount importance in providing users with a truly effective Ubiquitous support.
However, so far the intrinsic heterogeneity and the lack of an integrated approach led to several either too vertical, or practically unusable proposals, thus resulting in poor and non-versatile support platforms for Ubiquitous computing. 
This work investigates and promotes design principles to help cope with these ever-changing and inherently dynamic scenarios. By following the outlined principles, we have designed and implemented a middleware support platform to support the provisioning of Ubiquitous mobile services and contents. To prove the viability of our approach, we have realized and stressed on top of our support platform a number of different, extremely complex and heterogeneous content and service provisioning scenarios.
The encouraging results obtained are pushing our research work further, in order to provide a dynamic platform that is able to not only dynamically support novel Ubiquitous applicative scenarios by tailoring extremely diverse services and contents to heterogeneous user needs, but is also able to reconfigure and adapt itself in order to provide a truly optimized and tailored support for Ubiquitous service provisioning.
Realizing normal group-velocity dispersion in free space via angular dispersion
Creators: name: Hall, Layton A.
name: Abouraddy, Ayman F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It has long been thought that normal group-velocity dispersion (GVD) cannot be produced in free space via angular dispersion. Indeed, conventional diffractive or dispersive components such as gratings or prisms produce only anomalous GVD. We identify the conditions that must be fulfilled by the angular dispersion introduced into a plane-wave pulse to yield normal GVD. We then utilize a pulsed-beam shaper capable of introducing arbitrary angular-dispersion profiles to symmetrically produce normal and anomalous GVD in free space, which are realized here on the same footing for the first time.
title: Identification of Gut Microbiota in Blue Swimming Crabs Collected from the Eastern Coast of the Gulf of Thailand Containing Gill Net Debris
Creators: name: Ngamniyom, Arin
Publisher: name: Research Administration Division
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Crab guts
Monofilament
Microorganisms
Portunus

description: Science & Technology Asia, 30, 1, 290-297
Detecting Harmful Memes and Their Targets
Creators: name: Pramanick, Shraman
name: Dimitrov, Dimitar
name: Mukherjee, Rituparna
name: Sharma, Shivam
name: Akhtar, Md. Shad
name: Nakov, Preslav
name: Chakraborty, Tanmoy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: F.2.2; I.2.7
subject: 68T50

description: Among the various modes of communication in social media, the use of Internet memes has emerged as a powerful means to convey political, psychological, and socio-cultural opinions. Although memes are typically humorous in nature, recent days have witnessed a proliferation of harmful memes targeted to abuse various social entities. As most harmful memes are highly satirical and abstruse without appropriate contexts, off-the-shelf multimodal models may not be adequate to understand their underlying semantics. In this work, we propose two novel problem formulations: detecting harmful memes and the social entities that these harmful memes target. To this end, we present HarMeme, the first benchmark dataset, containing 3,544 memes related to COVID-19. Each meme went through a rigorous two-stage annotation process. In the first stage, we labeled a meme as very harmful, partially harmful, or harmless; in the second stage, we further annotated the type of target(s) that each harmful meme points to: individual, organization, community, or society/general public/other. The evaluation results using ten unimodal and multimodal models highlight the importance of using multimodal signals for both tasks. We further discuss the limitations of these models and we argue that more research is needed to address these problems.
description: harmful memes, multimodality, social media
Untwisting information from Heegaard Floer homology
Creators: name: Ince, Kenan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M27, 57M25

description: The unknotting number of a knot is the minimum number of crossings one must change to turn that knot into the unknot. We work with a generalization of unknotting number due to Mathieu-Domergue, which we call the untwisting number. The p-untwisting number is the minimum number (over all diagrams of a knot) of full twists on at most 2p strands of a knot, with half of the strands oriented in each direction, necessary to transform that knot into the unknot. In previous work, we showed that the unknotting and untwisting numbers can be arbitrarily different. In this paper, we show that a common route for obstructing low unknotting number, the Montesinos trick, does not generalize to the untwisting number. However, we use a different approach to get conditions on the Heegaard Floer correction terms of the branched double cover of a knot with untwisting number one. This allows us to obstruct several 10 and 11-crossing knots from being unknotted by a single positive or negative twist. We also use the Ozsváth-Szabó tau invariant and the Rasmussen s invariant to differentiate between the p- and q-untwisting numbers for certain p,q > 1.
description: 21 pages, 11 figures; final published version, appearing in Algebraic & Geometric Topology
No-nonsense, practical guide to implementing effective data practices
Creators: name: Chodacki, John
name: Vitale, Cynthia Hudson
name: Praetzellis, Maria
Publisher: name: Zenodo
Year: 2021

description: Data curation, discovery, reuse, and citation are accelerating scholarship across diverse fields and disciplines, but fall far short of the potential. Stakeholders across campuses are asked to “do better” at managing research data outputs. Often this comes with jargon-filled mandates that are difficult to translate into concrete action. In the summer of 2019, NSF published a clear, concrete call to action for researchers in a Dear Colleague Letter. In an effort to amplify that call and offer clarity to campus stakeholders, ARL, AAU, APLU, and CDL partnered to convene 40 experts in order to create clear, actionable, easy-to-understand guidance.The resulting report Implementing Effective Data Practices: Stakeholder recommendations for collaborative research support was recently released. This report provides specific recommendations for adopting and implementing persistent identifiers and supporting machine readable data management plans across an institution and within an organization or technology platform. It also provides key considerations for funders in adopting and requiring these critical infrastructure components. While the adoption and implementation of these best practices may be straightforward for some, communication about the importance of this infrastructure and the ease with which it may be implemented is needed. To support institutional and organizational efforts in the adoption of this infrastructure, the project team has developed a communication toolkit that includes various slide decks and talking points. This presentation will introduce these key areas and provide attendees with an introduction to toolkit and how they can leverage it to promote adoption of persistent identifiers for various stakeholders.
title:  Stratospheric Glider Measurements of Atmospheric Parameters
Creators: name: Haghighi, Anisa
Publisher: name: University of Kentucky Libraries
Year: 2023
Subjects: classificationCode: 2.3
subject: FOS: Mechanical engineering

description: In June 2021 a series of high altitude flights were conducted in Spaceport America, NM, using a balloon launched Uncrewed Aircraft System (UAS) to assess its capability to conduct measurements of various atmospheric properties and study turbulence in the troposphere and lower stratosphere. This UAS descends using an automated flight trajectory. The instruments aboard included a NASA-developed infrasonic microphone to evaluate its remote turbulence detection capabilities and a five-hole probe capable of measuring the in situ wind vector. Also on board were temperature, humidity and wind profile sensors. This document focuses on the atmospheric properties measured at high altitudes, the use of these properties to calculate different turbulence statistics, stability parameters and their connection to the turbulence using the five-hole probe measurements. By being able to transect the air, the glider allows for turbulence wavelengths to be sampled at a particular altitude, improving statistical convergence and spatial resolution of derived statistics from its in-situ sensors. The results show that the temperature and relative humidity agree well with conventional radiosonde measurements made by nearby National Weather Service stations. In addition, the results show that in-situ measurements using this type of UAS can be an effective tool for measuring atmospheric wind and turbulence.
description: 2023 Anisa Haghighi
Design And Implementation Of An End-To-End Simulator For The BepiColombo Rotation Experiment
Creators: name: Palli, Alessandra <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: ING-IND/05 Impianti e sistemi aerospaziali

description: Among the scientific objectives addressed by the Radio Science Experiment hosted on board the ESA mission BepiColombo is the retrieval of the rotational state of planet Mercury. In fact, the estimation of the obliquity and the librations amplitude were proven to be fundamental for constraining the interior composition of Mercury. This is accomplished by the Mercury Orbiter Radio science Experiment (MORE) via a strict interaction among different payloads thus making the experiment particularly challenging. 
The underlying idea consists in capturing images of the same landmark on the surface of the planet in different epochs in order to observe a displacement of the identified features with respect to a nominal rotation which allows to estimate the rotational parameters. Observations must be planned accurately in order to obtain image pairs carrying the highest information content for the following estimation process. 
This is not a trivial task especially in light of the several dynamical constraints involved. Another delicate issue is represented by the pattern matching process between image pairs for which the lowest correlation errors are desired. 
The research activity was conducted in the frame of the MORE rotation experiment and addressed the design and implementation of an end-to-end simulator of the experiment with the final objective of establishing an optimal science planning of the observations. In the thesis, the implementation of the singular modules forming the simulator is illustrated along with the simulations performed. The results obtained from the preliminary release of the optimization algorithm are finally presented although the software implemented is only at a preliminary release and will be improved and refined in the future also taking into account the developments of the mission.
Iterated bar complexes of E-infinity algebras and homology theories
Creators: name: Fresse, Benoit
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57T30; 55P48; 18G55; 55P35

description: We proved in a previous article that the bar complex of an E-infinity algebra inherits a natural E-infinity algebra structure. As a consequence, a well-defined iterated bar construction B^n(A) can be associated to any algebra over an E-infinity operad. In the case of a commutative algebra A, our iterated bar construction reduces to the standard iterated bar complex of A. The first purpose of this paper is to give a direct effective definition of the iterated bar complexes of E-infinity algebras. We use this effective definition to prove that the n-fold bar complex B^n(A) admits an extension to categories of algebras over E_n-operads. Then we prove that the n-fold bar complex determines the homology theory associated to a category of algebras over E_n-operads. For n infinite, we obtain an isomorphism between the homology of an infinite bar construction and the usual Gamma-homology with trivial coefficients.
description: 71 pages. Concluding section reduced and appendix of the former version removed.
Optimization Networks for Integrated Machine Learning
Creators: name: Kommenda, Michael
name: Karder, Johannes
name: Beham, Andreas
name: Burlacu, Bogdan
name: Kronberger, Gabriel
name: Wagner, Stefan
name: Affenzeller, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Optimization networks are a new methodology for holistically solving interrelated problems that have been developed with combinatorial optimization problems in mind. In this contribution we revisit the core principles of optimization networks and demonstrate their suitability for solving machine learning problems. We use feature selection in combination with linear model creation as a benchmark application and compare the results of optimization networks to ordinary least squares with optional elastic net regularization. Based on this example we justify the advantages of optimization networks by adapting the network to solve other machine learning problems. Finally, optimization analysis is presented, where optimal input values of a system have to be found to achieve desired output values. Optimization analysis can be divided into three subproblems: model creation to describe the system, model selection to choose the most appropriate one and parameter optimization to obtain the input values. Therefore, optimization networks are an obvious choice for handling optimization analysis tasks.
description: International Conference on Computer Aided Systems Theory, Eurocast 2017, pp 392-399
Representations of tensor categories coming from quantum linear spaces
Creators: name: Mombelli, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16W30, 18D10, 19D23

description: Exact indecomposable module categories over the tensor category of representations of Hopf algebras that are liftings of quantum linear spaces are classified.
description: 21 pages. Some minor mistakes are corrected. Section 4.1 is new. To appear in the Journal of the London Mathematical Society
Measurement of the Superparticle Mass Spectrum in the Long-Lived Stau Scenario at the LHC
Creators: name: Ito, Takumi
name: Kitano, Ryuichiro
name: Moroi, Takeo
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In supersymmetric scenarios with a long-lived stau, the LHC experiments provide us with a great environment for precise mass measurements of superparticles. We study a case in which the mass differences between the lightest stau and other sleptons are about 10 GeV or larger, so that the decay products of heavier sleptons are hard enough to be detected. We demonstrate that the masses of neutralinos, sleptons, and squarks can be measured with a good accuracy.
description: 20 pages, 6 figures
Symmetric and anti-symmetric Landau parameters and magnetic properties of dense quark matter
Creators: name: Pal, Kausik
name: Dutt-Mazumder, Abhee K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the dimensionless Fermi liquid parameters (FLPs), $F_{0,1}^{sym}$ and $F_{0,1}^{asym}$, for spin asymmetric dense quark matter. In general, the FLPs are infrared divergent due to the exchange of massless gluons. To remove such divergences, the Hard Density Loop (HDL) corrected gluon propagator is used. The FLPs so determined are then invoked to calculate magnetic properties such as magnetization $\langle M\rangle$ and magnetic susceptibility $χ_M$ of spin polarized quark matter. Finally, we investigate the possibility of magnetic instability by studying the density dependence of $\langle M\rangle$ and $χ_M$.
description: 14 pages, 5 figures, abstract and introduction modifified. Published in Phys. Rev. C. 81, 054906 (2010)
Automated Segmentation and Non-Rigid Registration for the
Quantitative Evaluation of Myocardial Perfusion from
Magnetic Resonance Images
Creators: name: Tarroni, Giacomo <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: ING-INF/06 Bioingegneria elettronica e informatica

description: Myocardial perfusion quantification by means of Contrast-Enhanced Cardiac Magnetic Resonance images relies on time consuming frame-by-frame manual tracing of regions of interest. In this Thesis, a novel automated technique for myocardial segmentation and non-rigid registration as a basis for perfusion quantification is presented. The proposed technique is based on three steps: reference frame selection, myocardial segmentation and non-rigid registration. In the first step, the reference frame in which both endo- and epicardial segmentation will be performed is chosen. Endocardial segmentation is achieved by means of a statistical region-based level-set technique followed by a curvature-based regularization motion. Epicardial segmentation is achieved by means of an edge-based level-set technique followed again by a regularization motion. To take into account the changes in position, size and shape of myocardium throughout the sequence due to out of plane respiratory motion, a non-rigid registration algorithm is required. The proposed non-rigid registration scheme consists in a novel multiscale extension of the normalized cross-correlation algorithm in combination with level-set methods. The myocardium is then divided into standard segments. Contrast enhancement curves are computed measuring the mean pixel intensity of each segment over time, and perfusion indices are extracted from each curve. The overall approach has been tested on synthetic and real datasets. For validation purposes, the sequences have been manually traced by an experienced interpreter, and contrast enhancement curves as well as perfusion indices have been computed. Comparisons between automatically extracted and manually obtained contours and enhancement curves showed high inter-technique agreement. Comparisons of perfusion indices computed using both approaches against quantitative coronary angiography and visual interpretation demonstrated that the two technique have similar diagnostic accuracy. In conclusion, the proposed technique allows fast, automated and accurate measurement of intra-myocardial contrast dynamics, and may thus address the strong clinical need for quantitative evaluation of myocardial perfusion.
Permanence criteria for semi-free profinite groups
Creators: name: Bary-Soroker, Lior
name: Haran, Dan
name: Harbater, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 12E30, 12F10, 20E18, 14H30

description: We introduce the condition of a profinite group being semi-free, which is more general than being free and more restrictive than being quasi-free. In particular, every projective semi-free profinite group is free. We prove that the usual permanence properties of free groups carry over to semi-free groups. Using this, we conclude that if k is a separably closed field, then many field extensions of k((x,y)) have free absolute Galois groups.
description: 24 pages
Path-integral approach to the thermodynamics of bosons with memory: Partition function and specific heat
Creators: name: Ichmoukhamedov, Timour
name: Tempere, Jacques
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: For a system of bosons that interact through a class of general memory kernels, a recurrence relation for the partition function is derived within the path-integral formalism. This approach provides a generalization to previously known treatments in the literature of harmonically coupled systems of identical particles. As an example the result is applied to the specific heat of a simplified model of an open quantum system of bosons, harmonically coupled to a reservoir of distinguishable fictitious masses.
description: 19 pages, 3 figures
Vacuum phenomenology of the chiral partner of the nucleon in a linear sigma model with vector mesons
Creators: name: Gallas, Susanna
name: Giacosa, Francesco
name: Rischke, Dirk H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate a linear sigma model with global chiral $U(2)_{R} \times U(2)_{L}$ symmetry. The mesonic degrees of freedom are the standard scalar and pseudoscalar mesons and the vector and axial-vector mesons. The baryonic degrees of freedom are the nucleon, $N$, and its chiral partner, $N^{*}$, which is usually identified with N(1535). The chiral partner is incorporated in the so-called mirror assignment, where the nucleon mass is not solely generated by the chiral condensate but also by a chirally invariant mass term, $m_{0}$. The presence of (axial-) vector fields modifies the expressions for the axial coupling constants of the nucleon, $g_{A}^{N}$, and its partner, $g_{A}^{N^{*}}$. Using experimental data for the decays $N^{*} \to N π$ and $a_{1} \toπγ$, as well as lattice results for $g_{A}^{N^{*}}$ we infer $m_{0}\sim500$ MeV, i.e., an appreciable amount of the nucleon mass originates from sources other than the chiral condensate. We test our model by evaluating the decay $N^{*} \to N η$ and the s-wave nucleon-pion scattering lengths $a_{0}^{(\pm)}$.
description: 16 pages, 2 figures. To appear in Phys. Rev. D
Improving trapped-ion-qubit memories via code-mediated error-channel balancing
Creators: name: Seis, Yannick
name: Brown, Benjamin J.
name: Sørensen, Anders S.
name: Goodwin, Joseph F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The high-fidelity storage of quantum information is crucial for quantum computation and communication. Many experimental platforms for these applications exhibit highly biased noise, with good resilience to spin depolarisation undermined by high dephasing rates. In this work, we demonstrate that the memory performance of a noise-biased trapped-ion qubit memory can be greatly improved by incorporating error correction of dephasing errors through teleportation of the information between two repetition codes written on a pair of qubit registers in the same trap. While the technical requirements of error correction are often considerable, we show that our protocol can be achieved with a single global entangling phase gate of remarkably low fidelity, leveraging the fact that the gate errors are also dominated by dephasing-type processes. By rebalancing the logical spin-flip and dephasing error rates, we show that for realistic parameters our memory can exhibit error rates up to two orders of magnitude lower than the unprotected physical qubits, thus providing a useful means of improving memory performance in trapped ion systems where field-insensitive qubits are not available.
description: 17 pages, 3 figures. The authors list has changed since the first version of this draft
Comparison of lycopene and β-carotene content in tomatoes determined with chemical and non-destructive methods
Creators: name: Alsina, I.
name: Dubova, L.
name: Duma, M.
name: Erdberga, I.
name: Avotiņš, A.
name: Rakutko, S.
Publisher: name: Agronomy Research
Year: 2019
Subjects: Lycopersicon esculentum
reflectance spectrum
reflectance index
article

description: Tomatoes are one of the most popular vegetables due of their wide use as food. Tomatoes are not only tasty fruit, but one of its benefits - high carotenoids content is well-known. Non-destructive analyses methods are used more and more in different industries. It is cheaper, faster and environmentally friendly way of analyse than traditional chemical methods. But these methods need references to the traditional ones. The aim of this study was to find the correlation between lycopene and β-carotene content in tomatoes determined with reflectance spectrometer and extraction of pigments. Content of two carotenoids (lycopene and β-carotene) was determined in 27 varieties of tomatoes. Red, pink, orange, yellow and brown fruits were included in experiment. Reflectance spectrums of tomatoes fruits were obtained with remote sensing portable spectroradiometer RS-3500 (Ltd.Spectral Evolution). Tetrahydrofuran was used for extraction of pigments. Absorption spectra of extract were obtained by spectrophotometer UV-Vis -1800 (Ltd. Shimadzu). Linear regression analyses were performed to correlate spectral data with lycopene and β-carotene concentrations measured by pigment extraction. The best reflectance region for lycopene spectral detection was 570 ± 5 nm, but for β-carotene 487 ± 5 nm. Reflectance indexes for both pigments were worked out. High linear correlation (R2 > 0.9) between spectral parameters and lycopene concentration was detected. Correlation between results obtained with methods used for β-carotene determination was lower and depended of colour of tomatoes fruits.
Path-integral approach to the thermodynamics of bosons with memory: Density and correlation functions
Creators: name: Ichmoukhamedov, Timour
name: Tempere, Jacques
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Expanding upon previous work, using the path-integral formalism we derive expressions for the one-particle reduced density matrix and the two-point correlation function for a quadratic system of bosons that interact through a general class of memory kernels. The results are applied to study the density, condensate fraction and pair correlation function of trapped bosons harmonically coupled to external distinguishable masses.
description: 23 pages, 5 figures
title: Parallelmessungen an deutschen Klimareferenzstationen
title: Schlussfolgerungen im Hinblick auf Homogenität und Messunsicherheiten
titleType: Subtitle
Creators: name: Hannak, Lisa
name: Brinckmann, Sven
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Parallelmessungen
subject: Klimareferenzstation
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::551 Geologie, Hydrologie, Meteorologie

description: An Klimareferenzstationen finden Parallelmessungen durch historische und operationelle Messgeräte statt. Mithilfe dieser Messungen sollen die Vergleichbarkeit der Messungen untersucht, die Messunsicherheit abgeschätzt und gegebenenfalls Methoden zur Homogenisierung der Messreihen entwickelt werden. Für diese Untersuchungen wurden folgende, besonders wichtige Klimaelemente ausgewählt: Lufttemperatur, relative Luftfeuchte, Niederschlagssumme, Sonnenscheindauer, Luftdruck und Erdbodentemperatur. In Hinblick auf die Homogenität langer Messreihen lässt sich zusammenfassend sagen, dass für die Messungen der Lufttemperatur (Ausnahme Tagesextrema), des Luftdruckes und der relativen Feuchte keine Inhomogenitäten aufgrund der Automatisierung zu erwarten sind. Bei den täglichen Temperaturminima und –maxima wurden leichte Änderungen vor allem in den Sommermonaten, hauptsächlich infolge des Wechsels der Strahlungsschutzhütte, festgestellt. Aufgrund der höheren Trägheit der Englischen Hütte (im Vergleich zur LAM-630), die durch den Aufbau ihrer Lamellen und ihres großen Luftvolumens stark von der Umgebungsluft abgeschottet ist, gleichen sich die Temperaturen in ihrem Inneren relativ langsam an die Umgebung an, sodass negative oder positive Temperaturspitzen nicht vollständig erfasst werden. Bei der Sonnenscheindauer wurden Unterschiede festgestellt, die auf das veränderte Messprinzip zurückzuführen sind. Mithilfe eines linearen Regressionsmodells können die Reihen jedoch homogenisiert werden. Bei den Messungen der Niederschlagshöhe konnte eine geringe, jedoch systematische Unterschätzung starker Niederschlagsevents des automatischen Messgeräts PLUVIO im Vergleich zum manuellen Messgerät nach Hellmann festgestellt werden. Für das aktuell operationelle automatische Messgerät Rain[e] zeigte sich für flüssigen Niederschlag eine gute Übereinstimmung zu den manuellen Hellmann-Messungen (innerhalb der definierten Toleranzbereiche), jedoch bei festem Niederschlag eine starke Unterschätzung der Niederschlagsmenge gegenüber der manuellen Referenz. Durch Verwendung eines Windschutzes am Rain[e] kann dieser Fehler verringert werden. In Zukunft sollen an den Klimareferenzstationen die Parallelmessungen von automatischen Messgeräten verschiedener Bauart fortgeführt werden. Zu den zu untersuchenden Messgrößen gehört demnächst auch die Windgeschwindigkeit.
GDI MS28 - Initial set of recommendations for addressing use cases
Creators: name: Cauët, Emilie
name: Van Goethem, Nina
Publisher: name: Zenodo
Year: 2024
Subjects: GDI
1+ Million Genomes Framework
Genomic Data Infrastructure
Use cases

description: Initial set of recommendations for addressing use cases, which links to D7.5 (https://zenodo.org/records/14537083).
Equation of state and elastic properties of face-centered-cubic FeMg alloy at ultrahigh pressures from first-principles
Creators: name: Asker, C.
name: Kargén, U.
name: Dubrovinsky, L.
name: Abrikosov, I. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We have calculated the equation of state and elastic properties of face-centered cubic Fe and Fe-rich FeMg alloy at ultrahigh pressures from first principles using the Exact Muffin-Tin Orbitals method. The results show that adding Mg into Fe influences strongly the equation of state, and cause a large degree of softening of the elastic constants, even at concentrations as small as 1-2 at. %. Moreover, the elastic anisotropy increases, and the effect is higher at higher pressures.
description: 6 figures
Amenable crossed product Banach algebras associated with a class of $\mathrm{C}^\ast$-dynamical systems
Creators: name: de Jeu, Marcel
name: Harti, Rachid El
name: Pinto, Paulo R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: Primary 47L65, Secondary 43A07, 46H25, 46L55

description: We prove that the crossed product Banach algebra $\ell^1(A,G,α)$ that is associated with a $\mathrm{C}^\ast$-dynamical system $(A,G,α)$ is amenable if $G$ is a discrete amenable group and $A$ is a commutative or finite dimensional $\mathrm{C}^\ast$-algebra. Perspectives for further developments are indicated.
description: Improved discussion of the relation with the existing literature and of perspectives for further developments. 8 pages. To appear in Integral Equations and Operator Theory