cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Road maintenance information management system based on product data model considering disaster use
Creators: name: Kubota, Satoshi
Publisher: name: The University of British Columbia
Year: 2015

description: Maintenance management is an essential operation that should be carried out effectively for maintaining, repairing, and rehabilitating highways and roads. It is necessary to accumulate information produced during the entire life cycle of roads in order to analyze problems and find solutions within a temporal sequence and to maintain them strategically and effectively. In road maintenance site, the administrators and engineers want to refer and utilize the road ledger and its drawings. It is difficult to carry and use the ledgers, because they are paper based documents. The primary objective of this study is to develop the product data models, which systematic information is defined for accumulating, exchanging, and sharing in civil infrastructure. And, this paper proposed a road maintenance information management system to collect, accumulate, share, and utilize the information considering disaster use. It is used in maintenance and disaster site by tablet PC. Road data models are effective for building an environment where the various data generated in a construction enterprise are used in an integrated manner. The constructed road data model has structural and work information. Structural information includes road structures such as bridges, carriageways, sidewalks, and road furniture. Inspections, repair judgments, repair of pavement, and construction of pavement are defined as work information. And, disaster information was added in structural information. The location-based expressions ‘GM_Point’, ‘GM_Surface’, and ‘GM_Polygon’ are defined to connect the road data model to spatial information. The proposed system was evaluated the usability and capability in road maintenance.
Quantum particle under dynamical confinement: From quantum Fermi acceleration to high harmonic generation
Creators: name: Rakhmanov, S.
name: Trunk, C.
name: Matrasulov, D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Quantum dynamics of a particle confined in a box with time-dependent wall is revisited by considering some unexplored aspects of the problem. In particular, the case of dynamical confinement in a time-dependent box in the presence of purely time-varying external potential is treated by obtaining exact solution. Also, some external potentials approving separation of space and time variables in the Schrodinger equation with time-dependent boundary conditions are classified. Time-dependence of the average kinetic energy and average quantum force are analyzed. A model for optical high harmonic generation in the presence of dynamical confinement and external linearly polarized monochromatic field is proposed.
title: How to engage smallholder producers in scaling the dairy and poultry sectors
title: Lessons from India
titleType: AlternativeTitle
Creators: name: Konok, Khadeja Akter
name: Gulati, Ashok
name: Ritika, Juneja
Publisher: name: Center for Development Research (ZEF)
Year: 2024
Subjects: subject: India
subject: Livestock
subject: Policy
subject: Agricultural production
subject: Producer organisation
subject: ddc:320
subject: ddc:630

description: India is a land of smallholders and its dairy and poultry sectors are no exception. The average herd size of the dairy sector is less than four animals per household. Nevertheless, India is the largest milk producer in the world (230 million tons in 2022-23), followed by the US at 103 million tons. The country has come a long way from being a milk-deficit country in the 1950s and 60s to a self-sufficient one with some surplus. Milk is not only the biggest agri-commodity (bigger than paddy, wheat, pulses and sugarcane put together), but the sector also employs 80 million rural households. Of the total workers engaged in milk production, more than 70 percent are women. On the other hand, the poultry sector has been the fastest-growing agriculture sector over the last two decades. Between 2000 and 2020, India’s poultry meat and egg production grew at an annual average rate of growth of 9 and 7 percent, respectively. India is now the third-largest producer of eggs in the world and the fifth-largest producer of broilers. In 2020, almost 80 percent of poultry production (in value terms) came from the organized contract farming segment and almost 70 percent of poultry farmers engaged through contract farming are smallholder farmers with a flock size of 3,000-10,000 birds. This policy briefs sheds light on the factors that have contributed to the growth of the two livestock sectors as well as challenges that remain to be addressed.
Circuit-to-Hamiltonian from tensor networks and fault tolerance
Creators: name: Anshu, Anurag
name: Breuckmann, Nikolas P.
name: Nguyen, Quynh T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We define a map from an arbitrary quantum circuit to a local Hamiltonian whose ground state encodes the quantum computation. All previous maps relied on the Feynman-Kitaev construction, which introduces an ancillary `clock register' to track the computational steps. Our construction, on the other hand, relies on injective tensor networks with associated parent Hamiltonians, avoiding the introduction of a clock register. This comes at the cost of the ground state containing only a noisy version of the quantum computation, with independent stochastic noise. We can remedy this - making our construction robust - by using quantum fault tolerance. In addition to the stochastic noise, we show that any state with energy density exponentially small in the circuit depth encodes a noisy version of the quantum computation with adversarial noise. We also show that any `combinatorial state' with energy density polynomially small in depth encodes the quantum computation with adversarial noise. This serves as evidence that any state with energy density polynomially small in depth has a similar property. As applications, we give a new proof of the QMA-completeness of the local Hamiltonian problem (with logarithmic locality) and show that contracting injective tensor networks to additive error is BQP-hard. We also discuss the implication of our construction to the quantum PCP conjecture, combining with an observation that QMA verification can be done in logarithmic depth.
description: Appeared in QIP 2024 and STOC 2024; version 2 included a proof of QMA-completeness and expanded discussions
title: Διαδίκτυο των πραγμάτων & βιώσιμο εργασιακό περιβάλλον
title: Internet of things & sustainable working environment
titleType: AlternativeTitle
Creators: name: Κάπαρη, Αικατερίνη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2024
Subjects: subject: AI
subject: IoT
subject: Sustainability
subject: SDGs
subject: Human resources
subject: Employee satisfaction

description: Σκοπός της μεταπτυχιακής διατριβής είναι να αναδείξει τη διασύνδεση που υπάρχει μεταξύ Τεχνητής Νοημοσύνης (Artificial Intelligence – AI) και πιο συγκεκριμένα, μέσω του Διαδικτύου των Πραγμάτων (Internet of Things – ΙοΤ) και των νέων ψηφιακών τεχνολογιών με το σύγχρονο εργασιακό περιβάλλον με κριτήριο τις ενδεδειγμένες βιώσιμες πρακτικές για την ευημερία των εργαζομένων.
Beta-Functions and RG flows for Holographic QCD with Heavy and Light Quarks: Isotropic case
Creators: name: Aref'eva, Irina Ya.
name: Hajilou, Ali
name: Slepov, Pavel
name: Usova, Marina
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a previous paper [arXiv:2402.14512v3], we investigated the dependence of the running coupling constant on temperature and chemical potential for holographic models of the light and heavy quarks, supported by an Einstein-dilaton-Maxwell action. In this paper, we study the dependence of the corresponding $β$-functions on the temperature and the chemical potential. As in the previous paper, we give special attention to the behavior of the $β$-functions near the 1st order phase transitions. We consider different types of boundary conditions for the dilaton. Only one of the possible boundary conditions yields results that agree with lattice calculations at zero chemical potential. The corresponding $β$-functions are negative and exhibit jumps at the 1st order phase transitions. We also show that the RG fluxes are invariant with respect to the choice of the boundary conditions and that our exact solutions for the light and heavy quarks are unstable, as expected, given their negative dilaton potentials.
description: 41 pages, 17 figures, 3 tables. arXiv admin note: substantial text overlap with arXiv:2402.14512
Thermal and mass transfer properties of a shrinkable industrial sludge: experimental determination and modeling approach
Creators: name: Layth, Al Ahmad
name: Christelle, Latrille
name: Delphine, Hainos
name: Denise, Blanc
name: Marc, Clausse
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: In this study the thermo-physical and mechanical properties of an industrial sludge like shrinkage coefficient, density, water activity, apparent moisture diffusivity, effective thermal conductivity and heat capacity are determined experimentally. These properties constitute a major part of the required input data to model the sludge drying. The sludge shrinks linearly until reaching a critical water content Xcr = 23% and then maintains a constant volume until the end of drying. Therefore, the density increases with decreasing the water content until the critical value (Xcr = 23%) then it decreases until the end of drying. The Henderson equation seems to be the most appropriate statistical model to describe the water sorption isotherm of the sludge. The apparent moisture diffusivity is determined from the numerical solution of Richard’s law of diffusion with shrinkage. The results show that the effective thermal conductivity and the heat capacity decrease with the reduction of the water content from 2.60 W m−1 K−1 and 2.52 J g−1 K−1 for a wet sludge to 1.71 W m−1 K−1 and 0.78 J g−1 K−1 for a dry sludge respectively. The relationships between thermo-physical / mechanical properties and the water content / temperature of the sludge are established to be introduced in the created numerical drying model.
NISQ Computers: A Path to Quantum Supremacy
Creators: name: AbuGhanem, Muhammad
name: Eleuch, Hichem
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Hardware Architecture (cs.AR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The quest for quantum advantage, wherein quantum computers surpass the computational capabilities of classical computers executing state-of-the-art algorithms on well-defined tasks, represents a pivotal race in the domain of quantum computing. NISQ (Noisy Intermediate-Scale Quantum) computing has witnessed remarkable advancements, culminating in significant milestones on the journey towards the realization of universal fault-tolerant quantum computers. This transformative turning point, known as quantum supremacy, has been achieved amid a series of breakthroughs, signifying the dawn of the quantum era. Quantum hardware has undergone substantial integration and architectural evolution, contrasting with its nascent stages. In this review, we critically examine the quantum supremacy experiments conducted thus far, shedding light on their implications and contributions to the evolving landscape of quantum computing. Additionally, we endeavor to illuminate a range of cutting-edge proof-of-principle investigations in the realm of applied quantum computing, providing an insightful overview of the current state of applied quantum research and its prospective influence across diverse scientific, industrial, and technological frontiers.
Risk of wildfires with known ignition points : case of residential buildings
Creators: name: Kalhor, Elmira
name: Valentin, Vanessa
Publisher: name: The University of British Columbia
Year: 2015

description: Wildfire is considered the dominant disaster in many regions of the world including the United States, Australia, Canada and parts of Europe. However, unlike other natural disasters, such as flooding, earthquakes and hurricanes, the risk of wildfire to the built environment is not vigorously studied. Most of the research in the wildfire risk management area is limited to the study and management of wildfire within the wildland. On the other hand, there is an increasing progress of housing projects towards the natural lands. The Wildland Urban Interface (WUI) is where the developed and undeveloped areas meet. Because of high vulnerability of the WUIs to wildfires, there is a need to identify, quantify and manage the expected damage of wildfires to the WUIs. This study calculates the risk of wildfires to residential buildings considering a specific ignition point. The model inputs include the spatial distribution of the buildings, an absolute or proxy value for the damage from wildfire, and atmospheric and landscape attributes needed to simulate the fire propagation on a specific land. The model outputs are the distribution of damage at each time interval from the initial ignition and total risk of a fire with a given ignition point.
title: Haba cabalar; Haba, Haboncillo :
title: Principes directeurs pour la conduite de l’examen de la distinction, de l’homogénéité et de la stabilité.
titleType: Subtitle
Creators: name: (:Unas)
Publisher: name: Unknown
Year: 2018

description: Ces principes directeurs (“principes directeurs d’examen”) visent à approfondir les principes énoncés dans l’introduction générale (document TG/1/3) et dans les documents TGP qui s’y rapportent afin de donner des indications concrètes détaillées pour l’harmonisation de l’examen de la distinction, de l’homogénéité et de la stabilité (DHS) et, en particulier, à identifier des caractères convenant à l’examen DHS et à la production de descriptions variétales harmonisées.
Gravity as Absence and Logical Relocation
Creators: name: passolungo, simone
Publisher: name: Zenodo
Year: 2025

description: This theoretical proposal reformulates the concept of gravity in purely logical and struc-tural terms, moving beyond the classical idea of an attractive force toward a center ofmass. Gravity is described here as the result of the absence of physical or energeticstructures that justify the position of an object in space. Gravitational movement thusbecomes a relocation toward an informationally coherent point: a logical nucleus fromwhich structure can emerge.
Reusability in visible light of titanate nanotubes for the removal of organic pollutants: role of calcination temperature.
Creators: name: Ruiz-Castillo, Ana Laura
name: Hinojosa-Reyes, Mariana
name: Camposeco-Solis, Roberto
name: Ruiz, Facundo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Inorganic Chemistry
subject: Science Policy

description: Titanate nanotubes (NTs) were synthesized by the hydrothermal method and later calcined at temperatures between 100 – 500 °C. The calcined NTs were characterized and evaluated in the physicochemical adsorption of the safranin dye and photocatalytic degradation of caffeine. The materials calcined at low temperatures displayed a tubular structure and the H2Ti3O7 crystalline phase, which was transformed into anatase nanoparticles at 400°C. The NTs treated at 100 °C showed the highest adsorption capacity (94 %). Safranin was adsorbed through an ion-exchange mechanism, following the Langmuir isotherm and a pseudo-second-order kinetic model. While NTs calcined at lower temperatures were better for adsorption, the photocatalytic degradation of caffeine increased in samples calcined at higher temperatures with a maximum removal of 72%. The photocatalytic behavior of the NT samples confirmed that the crystalline anatase structure in conjunction with structural OH groups enhanced the photocatalytic activity. The addition of isopropanol as a scavenger confirmed the important role played by the •OH radicals in the photocatalytic process. NTs calcined at 300 °C were efficient for both adsorption and photocatalytic processes. Due to its efficiency, this sample was reused after dye adsorption for the photocatalytic degradation of caffeine under visible light due to its enhanced absorbance in the visible region. This research work shows the potential of NTs for wastewater purification.
Two-fold degeneracy of a class of rational Painlevé V solutions
Creators: name: Aratyn, H.
name: Gomes, J. F.
name: Lobo, G. V.
name: Zimerman, A. H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We present a construction of a class of rational solutions of the Painlevé V equation that exhibit a two-fold degeneracy, meaning that there exist two distinct solutions that share identical parameters.
 The fundamental object of our study is the orbit of translation operators of $A^{(1)}_{3}$ affine Weyl group acting on the underlying seed solution that only allows action of some symmetry operations. By linking points on this orbit to rational solutions, we establish conditions for such degeneracy to occur after involving in the construction additional Bäcklund transformations that are inexpressible as translation operators. This approach enables us to derive explicit expressions for these degenerate solutions. An advantage of this formalism is that it easily allows generalization to higher Painlevé systems associated with dressing chains of even period $N>4$.
description: 15 pages
title: Ασφάλεια και ιδιωτικότητα στο υπολογιστικό νέφος & αξιολόγηση παρόχων υπηρεσιών υπολογιστικού νέφους
title: Cloud security and privacy and cloud service providers evaluation
titleType: AlternativeTitle
Creators: name: Τσούμπα, Αδαμαντία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2024
Subjects: subject: Υπολογιστικό νέφος
subject: Ασφάλεια
subject: Ιδιωτικότητα
subject: Πάροχοι υπηρεσιών υπολογιστικού νέφους

description: Στη σύγχρονη εποχή, η χρήση του υπολογιστικού νέφους έχει εισβάλλει σημαντικά στην καθημερινότητά μας. Η χρήση του υπολογιστικού νέφους έχει πολλά πλεονεκτήματα, αλλά παράλληλα εγείρει ανησυχίες και κρύβει κινδύνους, οι οποίοι απειλούν την ασφάλεια των δεδομένων μας και την ιδιωτικότητά μας. Οι οργανισμοί έχουν ελάχιστο έλεγχο της υποδομής και των μέτρων ασφάλειας του παρόχου υπηρεσιών υπολογιστικού νέφους και για αυτό το λόγο βασίζονται στον πάροχο για την εφαρμογή των κατάλληλων μέτρων ασφάλειας και τη συμμόρφωση με τους κανονισμούς ασφάλειας και ιδιωτικότητας. Η ασφάλεια και η προστασία της ιδιωτικότητας στο υπολογιστικό νέφος είναι κρίσιμα ζητήματα, τα οποία οι οργανισμοί πρέπει να λαμβάνουν σοβαρά υπόψη πριν την επιλογή του κατάλληλου για αυτούς παρόχου για να διασφαλιστεί η ασφάλεια και η προστασία των δεδομένων των ίδιων και των πελατών τους. Σκοπός, λοιπόν, της παρούσας εργασίας είναι η μελέτη των βασικών αρχών του υπολογιστικού νέφους, η ανάλυση των προκλήσεων ασφάλειας και των προβλημάτων ιδιωτικότητας, καθώς και των μέτρων ασφάλειας και των μηχανισμών προστασίας της ιδιωτικότητας και η παρουσίαση κανονισμών, προτύπων και νόμων σχετικών με το υπολογιστικό νέφος που θεσπίζονται για να διασφαλίσουν την ασφάλεια, την προστασία της ιδιωτικότητας και τη συμμόρφωση των υπηρεσιών που παρέχονται μέσω του υπολογιστικού νέφους. Τέλος, ο σημαντικότερος στόχος αυτής της εργασίας είναι η ανάπτυξη ενός πλαισίου για την αξιολόγηση των παρόχων υπηρεσιών υπολογιστικού νέφους και η λεπτομερής σύγκριση των χαρακτηριστικών ασφάλειας και προστασίας της ιδιωτικότητας των πέντε κορυφαίων παρόχων, των AWS, Microsoft Azure, GCP, IBM Cloud και Oracle Cloud.
title: Trade Policy, Human Capital, and Costly Worker Transitions
Creators: name: Jestrab, Ross
name: Riker, David
Publisher: name: United States International Trade Commission
publisherIdentifier: https://ror.org/05hsggr76
publisherIdentifierScheme: ROR
Year: 2023

description: Accumulation of human capital, through formal education and on-the-job experience,
shapes workers’ adjustment to job displacements after tariff reductions – whether they
switch industries, become unemployed, or leave the labor force. We develop an economic model that uses individual-level longitudinal CPS data on the employment transitions of U.S. manufacturing workers to estimate prospective labor adjustments in response to hypothetical reductions in tariff rates on U.S. manufacturing imports. The
simulation suggests that a worker’s observable human capital characteristics are important determinants of labor market outcomes following a trade policy change.
Selective Adsorption of Lead(II) from Aqueous Solution
Creators: name: Hoang, Viet Anh
name: Nishihama, Syouhei
name: Yoshizuka, Kazuharu
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified

description: Adsorptive separation of Pb(II) from aqueous solution containing Pb(II) and other heavy metals (Cu(II), Zn(II), and Cd(II)) has been investigated, using three adsorbents, such as an iminodiacetic acid-chelating resin (CR11), and Fe-based adsorbents (goethite and magnetite). Batchwise adsorption of Pb(II) and other metal ions in single metal system and multi-components system was carried out with varying parameters, such as pH, time, and initial concentrations of metals. CR11 possesses the highest adsorption ability for these metals, while the selectivity of individual metal is little. Goethite possesses selectivity for Pb(II) and Cu(II), and magnetite possesses selectivity for Pb(II), though the adsorption capacity for the metals are less than those with CR11. The kinetics of the adsorption of the metals with all adsorbents are of pseudo-second order, and the magnetite is revealed to have the fastest adsorption kinetics. The three adsorbents can be applied for chromatographic separation for these metals. The magnetite is feasible for selective separation of Pb(II), although complete elution cannot be achieved.
Geometric spectral theory of quantum graphs
Creators: name: Kennedy, James
Publisher: name: arXiv
Year: 2023
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: These are lecture notes from a course given at the summer school "Heat kernels and spectral geometry: from manifolds to graphs" in Bregenz, Austria, 2022. They are designed to be accessible to doctoral level students, and include background chapters on Laplacians on domains and quantum graphs before moving on to specialised topics involving the dependence and optimisation of operator eigenvalues on a metric graph in function of the graph geometry, drawn in part from the recent literature.
description: Final version, to appear in Communications in Mathematics
Η Αραβική Άνοιξη, ο Συριακός εμφύλιος και οι περιφερειακές ανακατατάξεις
Creators: name: Θεοδωράκης, Αναστάσιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Αραβική Άνοιξη
subject: Συρία
subject: Συριακός εμφύλιος πόλεμος
subject: Κέντρα ισχύος συστήματος
subject: Γεωπολιτικό σύμπλοκο υποσυστήματος Συρίας

description: Η Αραβική Άνοιξη σηματοδότησε μία νέα αρχή διαδηλώσεων και διαμαρτυριών που αφορούσαν τη διεκδίκηση συμφερόντων των λαών που ζούσαν υπό καταπιεστικό καθεστώς. Οι απαρχές της τοποθετούνται το 2010 και σε αυτήν ενεπλάκησαν πολλές δυνάμεις από τις οποίες η καθεμία απέβλεπε στην προσωπική της ανάπτυξη και σταθεροποίηση. Επίκεντρο σε αυτήν αποτέλεσε το κράτος της Συρίας. Σκοπός της έρευνας που διενεργήθηκε για την εργασία είναι η ανάδειξη της εμπλοκής διάφορων κρατών στην Αραβική Άνοιξη δίνοντας έμφαση στη Συρία και στον Εμφύλιο Πόλεμο που ξέσπασε εκεί. Επίσης, τονίζονται τα αποτελέσματα της συριακής κρίσης στα κέντρα ισχύος του συστήματος στο οποίο εντάσσεται και η ίδια. Ιδιαίτερη μνεία γίνεται για την ανάμειξη δύο κυρίαρχων χωρών, της Ρωσίας και της Τουρκίας, στα γεγονότα και τις ανάλογες επιπτώσεις που αυτές δέχτηκαν. Έτσι, πραγματοποιείται μια ευρεία ανάλυση σχετικά με τη συριακή εμπλοκή και τους δρώντες γύρω από αυτήν στην Αραβική Άνοιξη παραθέτοντας πληροφορίες που μπορούν να αποτελέσουν σημείο αναφοράς για περαιτέρω ανάλυση.
title: Design and Synthesis of Novel Probes for the Monitoring of Potential Drug Targets in Sphingolipid Metabolism
Creators: name: Ahmed, Zainelabdeen Hassep Mohamed
Publisher: name: Humboldt-Universität zu Berlin
Year: 2020
Subjects: subject: Eu-Komplexe
subject: FRET
subject: Sphingomyelinase
subject: Apyrase
subject: Eu-complexes
subject: FRET
subject: Sphingomyelinase
subject: Apyrase
subject: 547 Organische Chemie
subject: 543 Analytische Chemie
subject: 540 Chemie und zugeordnete Wissenschaften
subject: WD 5065
subject: VK 8707
subject: VG 8757

description: Ziel dieser Arbeit ist die Entwicklung neuer chemischer Sonden zur Überwachung der Aktivität von ASM sowohl in vitro als auch in vivo. Darüber hinaus wurde auch die Optimierung der angegebenen Sonden (besser: bereits publizierter Sonden) durchgeführt. Im ersten Teil dieser Studie wurden zwei Eu-Komplexe ausgehend von handelsüblicher Chelidaminsäure synthetisiert und führten zu einer guten Ausbeute mit hoher Reinheit. Die synthetisierten Sonden 4-D+ und 5-D+ wurden zum Nachweis verschiedener Phosphate und Carboxylatspezies verwendet. Sie wurden zur Überwachung der ASM-Aktivität durch den Nachweis des enzymatisch freigesetzten Phosphorylcholins (PC) eingesetzt. Trotz der vielversprechenden Abnahme der Lumineszenz von 4-D+ als Reaktion auf das anorganische PC zusätzlich zur Simulationsreaktion zur Änderung des SM / PC-Verhältnisses wurde in allen enzymatischen homogenen und heterogenen Experimenten ein allgemeiner Löscheffekt beobachtet. Der 5-D+ Komplex könnte zur Überwachung des ATP-hydrolysierenden Apyrase-Enzyms in Echtzeit verwendet werden. Im zweiten Teil dieser Studie wurden verschiedene FRET- und monomarkierte ASM-Sonden entworfen und synthetisiert. Eine neuartige FRET-Sonde mit einem besseren 2P-anregbaren Cumarinderivat zeigte eine etwa 20% Steigerung der Cumarinintensität im Vergleich zum alten Cumarinderivat. Eine neue Generation von ASM-Sonden mit einer quaternären Ammoniumgruppe, die das natürliche Substrat nachahmt, wurde ebenfalls entworfen und synthetisiert. Alle neuen quaternären Sonden wurden als ASM-Substrate nachgewiesen und zeigten unterschiedliche kinetische Parameter. Sie zeigten höhere Umsatz-Kcat-Werte im Vergleich zur nicht quaternären Sonde. Die meisten neuen Sonden zeigten auch höhere Spezifitätskonstanten gegenüber dem ASM-Enzym.
description: Sphingolipids are a family of bioactive signalling molecules. Besides their role in cellular structure, sphingolipids act as key regulators of many cellular functions including cell proliferation, differentiation, and apoptosis. The acid sphingomyelinase (ASM) catalyses the hydrolysis of sphingomyelin (SM) to ceramide, a metabolic hub of sphingolipid metabolism, and phosphoryl choline. Due to the lack of biochemical analytical tools, the molecular details of acid sphingomyelinase activity are still not fully discovered, and the development of pharmacological inhibitors is also hampered. The scope of this work is to develop new chemical probes for monitoring the activity of ASM both in vitro and in vivo.
Channel Estimation in Underdetermined Systems Utilizing Variational Autoencoders
Creators: Michael Baur
Nurettin Turan
Benedikt Fesl
Wolfgang Utschick
Publisher: name: IEEE Signal Processing Society
Year: 2024

description: In this work, we propose to utilize a variational autoencoder (VAE) for channel estimation (CE) in underdetermined (UD) systems. The basis of the method forms a recently proposed concept in which a VAE is trained on channel state information (CSI) data and used to parameterize an approximation to the mean squared error (MSE)-optimal estimator. The contributions in this work extend the existing framework from fully-determined (FD) to UD systems, which are of high practical relevance. Particularly noteworthy is the extension of the estimator variant, which does not require perfect CSI during its offline training phase. This is a significant advantage compared to most other deep learning (DL)-based CE methods, where perfect CSI during the training phase is a crucial prerequisite. Numerical simulations for hybrid and wideband systems demonstrate the excellent performance of the proposed methods compared to related estimators.
Η διαχείριση των κόκκινων δανείων και το σχέδιο Ηρακλής
Creators: name: Τριγώνης, Ευάγγελος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2024
Subjects: subject: Κόκκινο δάνειο
subject: Σχέδιο Ηρακλής

description: Κατά την εκπόνηση της παρούσας εργασίας πραγματοποιήθηκε θεωρητική ανάλυση της έννοιας των κόκκινων δανείων (NPL) στην Χώρα μας και εν συνεχεία πραγματοποιήθηκε οικονομετρική μελέτη, σχετικά με τη διερεύνηση των μεταβλητών που συσχετίζονται με το ύψος των μη εξυπηρετούμενων δάνειωνστην Ελλάδα, από την οποία προέκυψαν σχετικά συμπεράσματα.
Building a sustainable occupant's performance based model for institutional buildings
Creators: name: Salem, Dalia
name: Elwakil, Emad
name: Kandil, Amr
Publisher: name: The University of British Columbia
Year: 2015

description: The Sustainable buildings main objectives are to reduce, or avoid, depletion of resources like energy, water, and materials; prevent environmental degradation caused by facilities during the life cycle of the building. Lighting is one of the major energy consumption in institutional buildings. At 2012, the commercial sector, which includes commercial and institutional buildings, and Public Street and highway lighting, consumed about 274 billion kWh for lighting or about 7 % of the USA consumption. Most of the research works have focused predominantly on the environmental and physical factors and have neglected the daily activities of the occupants. This study examines the effects of environmental, physical, and daily activities on occupants’ performance in the institutional buildings as well as develops a model to predict the occupants’ performance using Regression analysis technique. The data was collected from the institutional buildings occupants and building facility experts using questionnaire. The model has been validated with 92 % Average Validity Percent (AVP) and R square of 0.83 which is a satisfactory result. The developed research /model benefits both architects and practitioners to choose the appropriate workplace design due to the occupants’ preferences to enhance performance, and energy efficiency.
Thermal and mass transfer properties of a shrinkable industrial sludge: experimental determination and modeling approach
Creators: name: Layth, Al Ahmad
name: Christelle, Latrille
name: Delphine, Hainos
name: Denise, Blanc
name: Marc, Clausse
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: In this study the thermo-physical and mechanical properties of an industrial sludge like shrinkage coefficient, density, water activity, apparent moisture diffusivity, effective thermal conductivity and heat capacity are determined experimentally. These properties constitute a major part of the required input data to model the sludge drying. The sludge shrinks linearly until reaching a critical water content Xcr  = 23 % and then maintains a constant volume until the end of drying. Therefore, the density increases with decreasing the water content until the critical value (Xcr  = 23 %) then it decreases until the end of drying. The Henderson equation seems to be the most appropriate statistical model to describe the water sorption isotherm of the sludge. The apparent moisture diffusivity is determined from the numerical solution of Richard’s law of diffusion with shrinkage. The results show that the effective thermal conductivity and the heat capacity decrease with the reduction of the water content from 2.60 W m-1 K-1 and 2.52 J g-1 K-1 for a wet sludge to 1.71 W m-1 K-1 and 0.78 J g-1 K-1 for a dry sludge respectively. The relationships between thermo-physical / mechanical properties and the water content / temperature of the sludge are established to be introduced in the created numerical drying model.
title: Development and characterization of a colloidal fluorescent ZIF derivative acting as a bio-label for immunoassays
Creators: name: Chapartegui Arias, Ander
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Antikörper
subject: Immunoassays
subject: metal-organic frameworks
subject: nanopartikel
subject: Zeolith-Analoga
subject: Zeolitic imidazolate frameworks
subject: antibodies
subject: immunoassays
subject: nanoparticles
subject: zeolite analogues
subject: Zeolitic imidazolate frameworks
subject: metal-organic frameworks
subject: 540 Chemie und zugeordnete Wissenschaften
subject: WC 5700
subject: YV 4500
subject: VE 9607
subject: VE 7007

description: In dieser Arbeit ein neues bioanalytisches Konzept untersucht, das nanoskalige Zeolith-Imidazolat-Frameworks (ZIFs) als Marker für antikörperbasierte Analysemethoden einsetzt, einschließlich Enzyme-Linked-Immunosorbent-Assay (ELISA) und Lateral Flow Immunoassay (LFIA). Der Vorteil von ZIFs als Marker gegenüber etablierten Materialien ist ihre vielseitige, einfache und kostengünstige Synthese. Dazu gehört die Möglichkeit, niedermolekulare Substanzen für zusätzliche Sensorzwecke zu verkapseln und für eine hohe Selektivität stabil an Biomakromoleküle zu konjugieren. Als modellhafter Zielanalyt von Relevanz wurden Phthalat-Acylester (PAEs) ausgewählt. Die Relevanz des Nachweises von PAEs ergibt sich aus ihren Eigenschaften als endokrin wirksame Chemikalien (EDCs) und krebserregend. In Kombination mit der Tatsache, dass PAEs aufgrund ihrer Verwendung als Weichmacher in Kindergeschirr, Spielzeug, Trinkflaschen und anderen Produkten auf Polyvinylchlorid-Basis in der Umwelt reichlich vorhanden sind, zeigt, wie wichtig der routinemäßige Nachweis von PAEs in Trinkwasser oder Lebensmitteln ist.
description: This work explores a new bioanalytical concept that employs nanosized Zeolite Imidazolate Frameworks (ZIFs) particles as labels for antibody-based analytical methods, including enzyme-linked immunosorbent assay (ELISA) and lateral flow immunoassay (LFIA). The advantage of ZIFs as labels over established materials is their versatile, facile, and cheap synthesis. This includes the ability to encapsulate low molecular weight substances for additional sensing purposes and for stable conjugation to biomacromolecules for high selectivity. As a model target analyte of relevance Phthalate acyl esters (PAEs) have been selected. The relevance of the detection of PAEs is due to their properties as endocrine disrupting chemicals (EDCs) and carcinogenic. Combined with PAEs being abundant on the environment because of their use as plasticizers in plastic-made tableware for children, toys, drinking bottles and other polyvinylchloride-based products, shows the importance or their routine detection of drinking water or foods being so critical.
Multi-fidelity No-U-Turn Sampling
Creators: name: Ravi, Kislaya
name: Neckel, Tobias
name: Bungartz, Hans-Joachim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Markov Chain Monte Carlo (MCMC) methods often take many iterations to converge for highly correlated or high-dimensional target density functions. Methods such as Hamiltonian Monte Carlo (HMC) or No-U-Turn Sampling (NUTS) use the first-order derivative of the density function to tackle the aforementioned issues. However, the calculation of the derivative represents a bottleneck for computationally expensive models. We propose to first build a multi-fidelity Gaussian Process (GP) surrogate. The building block of the multi-fidelity surrogate is a hierarchy of models of decreasing approximation error and increasing computational cost. Then the generated multi-fidelity surrogate is used to approximate the derivative. The majority of the computation is assigned to the cheap models thereby reducing the overall computational cost. The derivative of the multi-fidelity method is used to explore the target density function and generate proposals. We select or reject the proposals using the Metropolis Hasting criterion using the highest fidelity model which ensures that the proposed method is ergodic with respect to the highest fidelity density function. We apply the proposed method to three test cases including some well-known benchmarks to compare it with existing methods and show that multi-fidelity No-U-turn sampling outperforms other methods.
description: This work was presented in MCQMC conference, 2022. It will be published in the proceedings of the conference
Sigma model instantons and singular tau function
Creators: name: Antonov, E. N.
name: Orlov, A. Yu.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The generating series for the instanton contribution to Green functions of the $2D$ sigma model was found in the works of Schwarz, Fateev and Frolov. We show that this series can be written as a formal tau function of the two-sided two-component KP hierarchy. We call it formal singular tau function because this tau function is a sum where each term is the infrared and ultraviolet divergent one exactly as the series found by the mentioned authors. However one can regularize this singluar tau function and to obtain regular observables. This is because observables contains ratious of mentioned divergent expressions. Thus, we enladge the families of tau functions to work with.
description: 8 pages
title: CC2 response method using local correlation and density fitting approximations for the calculation of the electronic g-tensor of extended open-shell molecules
Creators: name: Christlmaier, Evelin Martine Corvid
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Coupled Cluster
subject: Coupled Cluster
subject: Spin
subject: Elektronischer g-Tensor
subject: Response-Theorie
subject: Lokale Korrelation
subject: Spin
subject: Electronic g-tensor
subject: Response theory
subject: Local correlation
subject: 541 Physikalische Chemie
subject: VE 5657
subject: VC 6107

description: In dieser Arbeit wird eine unrestricted Coupled-Cluster CC2 Response-Methode für die Berechnung von Eigenschaften erster und zweiter Ordnung, mit dem elektronischen g-Tensor als Schwerpunkt, präsentiert. Lokale Korrelations- und Dichtefittingnäherungen wurden verwendet. Die fundamentalen Konzepte notwendig für das Verständnis von Coupled-Cluster-Theorie, Dichtefitting, lokaler Korrelation, allgemeinen Coupled-Cluster Eigenschaften und dem elektronischen g-Tensor werden diskutiert. Die berechneten g-Tensoren werden mit denen durch Coupled-Cluster Singles and Doubles, Dichtefunktionaltheorie und Experiment erhaltenen verglichen. Effizienz und Genauigkeit der Näherung wird untersucht. Ein detailierter Anhang beschreibt die diagrammatische Coupled-Cluster-Theorie sowie ihre Anwendung zur Herleitung der verwendeten Arbeitsgleichungen. Die in dieser Arbeit entwickelte Methode ermöglicht es, den elektronischen g-Tensor von ausgedehnten Systemen mit einer Methode, die nicht auf Dichtefunktionaltheorie basiert, quantitativ vorherzusagen. Damit ist sie ein wichtiger Schritt hin zur Entwicklung von niedrig skalierenden Coupled-Cluster-Methoden höherer Ordnung für diese Art von Problem.
description: This work presents an unrestricted coupled-cluster CC2 response method using local correlation and density fitting approximations for the calculation of first and second order properties with particular focus on the electronic g-tensor. The fundamental concepts related to coupled-cluster theory, density fitting, local correlation, general coupled-cluster properties and the electronic g-tensor are discussed. The calculated g-tensors are benchmarked against those obtained from coupled-cluster singles and doubles, density functional theory and experiment. Efficiency and accuracy of the approximations is investigated. A detailed appendix covers the fundamentals of diagrammatic coupled-cluster and its application to the derivation of the working equations. The method presented in this thesis enables the quantitative prediction of the electronic g-tensor of extended systems with a method other than density functional theory. It represents an important step towards the development of low-scaling higher order coupled-cluster methods for this type of problem.
Supplementary document for Real-time, in-situ measurement of H2O generated during in situ combustion tests using 1f –normalized wavelength modulation spectroscopy with second harmonic detection - 6100203.pdf
Creators: name: Posada, Juan Duque
name: Jaramillo, Manuel
name: Gómez, Sebastian López
name: Torres, Pedro
name: Molina, Alejandro
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Structural Chemistry and Spectroscopy

description: Supplemental document
Weberite Na$_2$MM'F$_7$ (M,M'=Redox-Active Metal) as Promising Fluoride-Based Sodium-Ion Battery Cathodes
Creators: name: Lu, Tenglong
name: Meng, Sheng
name: Liu, Miao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Sodium-ion batteries are a viable alternative to lithium-ion technology due to the plentiful sodium resources. However, certain commercialization challenges, such as low specific energies and poor cycling performance of current Na-ion cathodes, still need to be addressed. To overcome these hurdles, this study explored the potential of a novel class of fluoride-based materials, specifically trigonal-type Na$_2$MM'F$_7$ (M and M' are redox-active metals) belonging to the weberite-type compounds, as promising candidates for Na-ion cathodes. Through a comprehensive assessment utilizing ab initio calculations, twelve prospective compounds were identified, demonstrating high thermodynamic stability, large gravimetric capacities (>170 mAh/g), and low net Na-ion migration barriers (<600 meV). Significantly, ten out of the twelve screened compounds exhibit high specific energies exceeding 580 Wh/kg (approximately equals to the specific energy of LiFePO$_4$), indicating their exceptional electrochemical performance. This study will pave the way for further advancements in fluoride-based electrode materials.
Evaluación DELE
Creators: name: Peña DIX, Beatriz María
Publisher: name: Universidad Externado de Colombia
Year: 2022

description: Objetivos Generales: * Abordar desde diferentes ópticas los principios básicos que sustentan la evaluación en los procesos de enseñanza y aprendizaje del español como lengua extranjera, que permita al participante trabajar la evaluación desde una perspectiva constructivista. Objetivos Específicos: * Profundizar en la evaluación como proceso, con el fin de establecer bases para planear, diseñar y evaluar instrumentos de evaluación. * Identificar y promover las diferentes tipologías de evaluación. * Determinar los criterios básicos para evaluar las habilidades de comprensión y producción.
description: El módulo busca darle a la evaluación el lugar de importancia que se merece dentro de la educación y más específicamente en el campo de la enseñanza y el aprendizaje. Para tal fin se propende por una evaluación como proceso constante, dinámico y de reflexión que lleve a los docentes, los investigadores y los evaluadores a cambiar prácticas tradicionales hacia propuestas que se ajusten más a los cambios que nos demandan los nuevos roles y ámbitos de desempeño en las lenguas extranjeras.
Distortion-Aware Phase Retrieval Receiver for High-Order QAM Transmission with Carrierless Intensity-Only Measurements
Creators: name: Huang, Hanzi
name: Chen, Haoshuo
name: Gao, Qi
name: Huang, Yetian
name: Fontaine, Nicolas K.
name: Mazur, Mikael
name: Dallachiesa, Lauren
name: Ryf, Roland
name: Li, Zhengxuan
name: Song, Yingxiong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: We experimentally investigate transmitting high-order quadrature amplitude modulation (QAM) signals with carrierless and intensity-only measurements with phase retrieval (PR) receiving techniques. The intensity errors during measurement, including noise and distortions, are found to be a limiting factor for the precise convergence of the PR algorithm. To improve the PR reconstruction accuracy, we propose a distortion-aware PR scheme comprising both training and reconstruction stages. By estimating and emulating the distortion caused by various channel impairments, the proposed scheme enables enhanced agreement between the estimated and measured amplitudes throughout the PR iteration, thus resulting in improved reconstruction performance to support high-order QAM transmission. With the aid of proposed techniques, we experimentally demonstrate 50-GBaud 16QAM and 32QAM signals transmitting through a standard single-mode optical fiber (SSMF) span of 40 and 80 km, and achieve bit error rates (BERs) below the 6.25% hard decision (HD)-forward error correction (FEC) and 25% soft decision (SD)-FEC thresholds for the two modulation formats, respectively. By tuning the pilot symbol ratio and applying concatenated coding, we also demonstrate that a post-FEC data rate of up to 140 Gb/s can be achieved for both distances at an optimal pilot symbol ratio of 20%.
description: 12 pages, 12 figures