cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Torsionstragverhalten segmentierter Turmkonstruktionen für Windenergieanlagen
Creators: name: Klein, Fabian
name: Hartwig, Steffen
name: Marx, Steffen
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: Torsion
subject: trockene Fugen
subject: Hybridturm
subject: Windenergieanlage
subject: Wölbkrafttorsion
subject: dry joints
subject: hybrid tower
subject: wind energy turbine
subject: warping torsion
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Bei der weiteren Kostensenkung der Windstromerzeugung haben sich in den letzten Jahren sogenannte Hybridturme erfolgreich etabliert. Der untere Teil dieser Turmstrukturen besteht aus aufeinander gestapelten Betonfertigteilringen, die mit dem aufgesetzten Stahlturm verbunden sind. Mit der neuen Turmgeneration zerlegen vertikale Fugen die Betonsegmente in kleinere Komponenten, sodass Halbschalen einen erheblichen Beitrag zur Reduzierung der Transportkosten und des Montageaufwands leisten. Dieser Artikel beschäftigt sich mit numerischen Voruntersuchungen zum Vergleich der Torsionstragfähigkeiten von konventionellen Kreisring- und geteilten Halbschalenkonstruktionen. Die Ergebnisse deuten darauf hin, dass das Torsionstragverhalten zusammengesetzter Halbschalen deutlich komplexer ist. Die Auswertung der Verdrehsteifigkeiten zeigt, dass die geteilten Segmente lediglich geringfügig kleinere Tragfähigkeiten aufweisen. Das Verhältnis von Reibbeiwert zu Vorspannung wird dabei als signifikante Einflussgröße für die Ermittlung der Fugentragfähigkeit identifiziert.
description: In recent years, so-called hybrid towers have been successfully established themselves in the further cost reduction of wind power generation, especially for large hub heights. The lower part of these tower structures consists of stacked concrete ring segments whereas the upper part is composed of steel sections. With the new generation of towers, vertical joints divide the concrete segments into even smaller components, so that half shells increase transportability and reduce installation effort. This paper deals with numerical investigations to compare the torsional load capacities of conventional circular rings with half shell constructions. The results indicate that the torsional load bearing behaviour of composite half shells is much more complex. The evaluation of the torsional stiffness shows that the divided segments have only a slightly reduced load carrying capacity. The ratio of friction coefficient to prestressing level is identified as a significant factor for determination of joint load bearing capacity.
title: Специфика рассказов об избрании на царство в «Рукописи Филарета»
Creators: name: Туфанова, Ольга
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: На основе композиционного анализа рассказов об избрании на царство в «Рукописи Филарета» исследуется специфика жанровой формы, выявляются основные структурные элементы, свидетельствующие о том, что перед нами — особый вид церемонии.
An Image Steganography Scheme using Randomized Algorithm and Context-Free Grammar
Creators: name: Bassil, Youssef
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cryptography and Security (cs.CR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Currently, cryptography is in wide use as it is being exploited in various domains from data confidentiality to data integrity and message authentication. Basically, cryptography shuffles data so that they become unreadable by unauthorized parties. However, clearly visible encrypted messages, no matter how unbreakable, will arouse suspicions. A better approach would be to hide the very existence of the message using steganography. Fundamentally, steganography conceals secret data into innocent-looking mediums called carriers which can then travel from the sender to the receiver safe and unnoticed. This paper proposes a novel steganography scheme for hiding digital data into uncompressed image files using a randomized algorithm and a context-free grammar. Besides, the proposed scheme uses two mediums to deliver the secret data: a carrier image into which the secret data are hidden into random pixels, and a well-structured English text that encodes the location of the random carrier pixels. The English text is generated at runtime using a context-free grammar coupled with a lexicon of English words. The proposed scheme is stealthy, and hard to be noticed, detected, and recovered. Experiments conducted showed how the covering and the uncovering processes of the proposed scheme work. As future work, a semantic analyzer is to be developed so as to make the English text medium semantically correct, and consequently safer to be transmitted without drawing any attention.
description: LACSC - Lebanese Association for Computational Sciences, http://www.lacsc.org
SINGLE SAMPLING PLANS FOR VARIABLE INSPECTION BASED ON BIRNBAUM – SAUNDERS DISTRIBUTION
Creators: name: Saranya, C.R.
name: Vijayaraghavan, R.
name: Sathya Narayana Sharma, K.
name: Sathya Narayana Sharma, K.
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Sampling inspection plans
variable sampling
Birnbaum – Saunders distribution
nonnormality
skewness

description: Sampling inspection by the method of variables is a well-known category of product control in which the discretion of acceptance or rejection is made hinge on some specific rule, which is framed according to the measurement of a quality characteristic under study. In this scenario, the quality feature under study is considered a continuous random variable that can be demonstrated using any continuous type statistical distribution. Birnbaum – Saunders distribution is a continuous probability distribution, which is having numerous applications in various fields. Application of Birnbaum – Saunders distribution is considered in this paper for establishing acceptance sampling inspection plans for variables based on the examination of units from a single sample. Numerical illustrations are given to demonstrate the application of proposed sampling plan. In addition, the results of numerical illustrations are explained with the help of simulated data.
title: Проблема свободы в романе Ф.М.Достоевского «Преступление и наказание» (по страницам учебной литературы)
Creators: name: Федорова, Елена
name: Шалина, Марина
name: Капустина, Светлана
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Дается обзор учебной литературы, в которой рассматривается проблема свободы в романе Ф.М.Достоевского «Преступление и наказание». В 60—80-е годы в учебной литературе преобладал тенденциозный подход к произведению, Раскольникова воспринимали как жертву социальных обстоятельств, в романе видели призыв к бунту, героя и его теорию оправдывали. В 1990-е и 2000-е годы в учебной литературе появляется стремление поднять этические проблемы, однако к духовно-нравственной проблематике обращаются очень немногие исследователи. В настоящее время существует немногочисленная учебная литература, в которой проблема свободы раскрывается как философская, онтологическая и аксиологическая. В статье рассматривается концепция свободы и личности Достоевского и предлагаются направления для дальнейшего исследования проблемы.
title: Противостояние духовному нигилизму в литературно-критических публикациях газеты И.С.Аксакова «Русь»
Creators: name: Федосеева, Татьяна
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Проанализированы отдельные литературно-критические публикации газеты «Русь» 1881—1884 годов, связанные с проблемой нигилизма. В передовицах И.С.Аксакова и рецензии И.Н.Павлова на роман Ф.М.Достоевского «Братья Карамазовы» выделены мысли о заимствованном характере нигилизма и необходимости положительной идеи в литературе. Подробно рассмотренные обзорные статьи Н.Н.Страхова и К.Ф.Головина содержат обобщение выраженного в публикациях газеты отношения к современной русской литературе. Выделяется творчество И.С.Тургенева, Ф.М.Достоевского, Л.Н.Толстого как больших художников, проникающих в глубины духовной жизни народа и извлекающих из нее положительное содержание. Творчество большей части молодых беллетристов трактуется как ограниченное поверхностным взглядом на русскую жизнь и резко отрицательным отношением к ней. Общее состояние литературы свидетельствует о духовном и нравственном кризисе современного человека. Выход из кризиса критики связывают с христианским сознанием, снимающим внутренние и внешние противоречия жизни. Проведенное исследование подчеркивает примиряющее значение антинигилистической критики, утверждение духовного содержания литературного творчества и высокие требования к уровню художественности литературных произведений.
Sustainable Treatment of Aquaculture Effluents – What Can We Learn from the Past for the Future?
Creators: name: Papenbrock, Jutta
name: Turcios, Ariel E.
Publisher: name: Basel : MDPI AG
Year: 2014
Subjects: subject: aquaculture
subject: aquaponics
subject: halophytes
subject: nutrients
subject: Salicornia spp.
subject: wastewater
subject: wetlands
subject: Salicornia
subject: Aquakultur
subject: Aquaponik
subject: Salzpflanze
subject: Halophyt
subject: Nährstoff
subject: Queller
subject: Fuchsschwanzgewächs
subject: Amaranthaceae
subject: Abwasser
subject: Feuchtgebiet
subject: Aquakultur
subject: Aquaponik
subject: Halophyten
subject: Nährstoff
subject: Fuchsschwanzgewächse
subject: Abwasser
subject: Feuchtgebiet
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)

description: Many aquaculture systems generate high amounts of wastewater containing compounds such as suspended solids, total nitrogen and total phosphorus. Today, aquaculture is imperative because fish demand is increasing. However, the load of waste is directly proportional to the fish production. Therefore, it is necessary to develop more intensive fish culture with efficient systems for wastewater treatment. A number of physical, chemical and biological methods used in conventional wastewater treatment have been applied in aquaculture systems. Constructed wetlands technology is becoming more and more important in recirculating aquaculture systems (RAS) because wetlands have proven to be well-established and a cost-effective method for treating wastewater. This review gives an overview about possibilities to avoid the pollution of water resources; it focuses initially on the use of systems combining aquaculture and plants with a historical review of aquaculture and the treatment of its effluents. It discusses the present state, taking into account the load of pollutants in wastewater such as nitrates and phosphates, and finishes with recommendations to prevent or at least reduce the pollution of water resources in the future.
Fachwerke aus Betonstreben und Sphärogussknoten
Creators: name: Stümpel, Marina
name: Marx, Steffen
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: Fachwerk
subject: Beton
subject: Sphäroguss
subject: Schubrippen
subject: Verguss
subject: truss structure
subject: concrete
subject: ductile cast iron
subject: shear keys
subject: grouting
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Fachwerke gehören zu den leistungsfähigsten Tragstrukturen im Bauwesen. So wurden schon zu Beginn der Stahlbetonbauweise Fachwerkkonstruktionen aus Beton gebaut. Die mit der Ausführung einhergehenden Schwierigkeiten führten jedoch dazu, dass sich Fachwerke aus Beton nicht dauerhaft etablierten. In diesem Zusammenhang zeigt der vorliegende Beitrag eine Möglichkeit das Potential von Betonfachwerken weiter auszuschöpfen. Es wird eine Fachwerkstruktur vorgestellt, die aus Betonstreben und Sphärogussknoten besteht. Die Verbindung der Komponenten wird über einen Vergussbeton realisiert, wozu die Sphärogussknoten an der Innenseite eine Profilierung aufweisen. Die Konstruktion dieser Verbindung sowie die zur Ermittlung der Tragfähigkeit durchgeführten Untersuchungen liegen im Fokus des Beitrags.
description: Truss structures are among the most efficient load-bearing structures in the building industry. Thus, concrete truss structures were already built at the beginning of reinforced concrete construction. However, the difficulties associated with the execution didn’t lead to the permanent establishment of concrete trusses. In this context, this article shows a possibility to further exploit the potential of concrete trusses. A truss structure consisting of concrete struts and ductile cast iron nodes is presented. The connection of the components is realized by a grouting concrete, for which the ductile cast iron nodes have a profile on the inside. The construction of this connection and the investigations carried out to determine the load-bearing capacity are the focus of the article.
Zannichellia palustris L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: Z.palustris L. Cat. 333. Var. repens (Boenningh.) Koch (Z. tenuis Reuter) - l: Kanal bei der Pissevache (Coquoz). - 3: Ausstich beim Bahnhof Charrat-Fully, 1915und später, heute erloschen (Garns).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Beiträge zur empirischen Arbeitsökonomik
Creators: name: Teschner, Tatjana
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Wage bargaining regime
subject: gender wage gap
subject: Fairness
subject: Lohnsetzungsregime
subject: geschlechtsspezifisches Lohndifferenzial
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: [no abstract]
The structure of nucleons and the description of the electromagnetic form factors
Creators: name: Selyugin, O. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The comparison of different sets of PDFs structure functions with the description of the whole sets of experimental data of electromagnetic form factors of the proton and neutron is made in the frame work of our model of t-dependence of generalized parton distributions (GPDs) and some other models. It is shown that despite a small difference of the description of the inelastic processes by the different sets of PDF there is an essentially large difference in the description of electromagnetic form factors of the nucleons.
description: 4 pages, 4 figures, talk on Intern. Conf. "SPIN in High Energy Physics", Dubna, 2012
STRESS-STRENGTH RELIABILITY MODEL UNDER MULTIVARIATE NORMAL SETUP AND ITS APPLICATIONS
Creators: name: Babulal Seal
name: Anirban Goswami
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Stress-strength
Principal component
Maximum Likelihood Estimator (MLE)
Minimum Variance Unbiased Estimator (MVUE)
Confidence Intervals

description: We often see that in a system, the energy is supplied to the system by 𝑝! sources and its consumed through 𝑝" sources and the sources are linearly dependent with vector 𝒂' and 𝒃'. The overall representation of the two sets are related to vectors 𝒂 and 𝒃, such that they are approximated by 𝒂'𝒙 and 𝒃'𝒚 as in principal component analysis. In this article, a stress strength reliability model R= Pr(𝒂'𝒙 > 𝒃'𝒚), when 𝒙 and 𝒚 are distributed dependently multivariate normal distribution is proposed, with 𝒂 and 𝒃 are two known vectors. MVUE and MLE of R are obtained. Through simulation studies, their performances are compared using different measures. The two-sided confidence intervals and lower bounds of R are obtained through exact and asymptotic distribution of maximum-likelihood estimators and using bootstrap procedure. Through simulation studies, the performances of these confidence intervals are empirically checked using their coverage and the accuracy. In this study, we proposed to choose the optimal sample size for an experiment assures an adequate power and level. Finally, we applied these interval estimators to a real data set.
Innovatives Bewehrungskonzept für leichte Stützen aus ultra-hochfestem Beton
Creators: name: Markowski, Jan
name: Lohaus, Ludger
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: ultra-hochfester Beton
subject: Kohlenstofffaserverstärkter Kunststoff
subject: Wickelverstärkung
subject: Stützen
subject: Bauweise
subject: ultra-high performance concrete
subject: carbon fibre reinforced polymer
subject: winding reinforcement
subject: columns
subject: construction method
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In diesem Artikel wird eine neuartige Bauweise für Stützen aus ultra-hochfestem Beton (UHFB) vorgestellt. Im Vordergrund steht dabei ein Bewehrungskonzept, welches anstelle einer Bewehrung aus Stabstahl aus einer Kombination aus Stahlblech und Carbongelege besteht. Die resultierende Konstruktion ist im Vergleich zu konventionellen Betonbauweisen extrem leicht und hinsichtlich des Verhältnisses Tragfähigkeit zu Gewicht sogar günstiger als Stahlprofile. Somit ist durch die materialgerechte Konstruktion mit Hilfe von UHFB eine ressourcenschonender Betonbauweise möglich. In diesem Artikel werden das Bewehrungskonzept sowie die konstruktiven Grundsätze für derartige UHFB-Stützen beschrieben. Sie werden aus experimentellen und numerischen Untersuchungen abgeleitet. Die in diesem Artikel beschriebenen Bauteile können in vielfältigen aufgelösten Tragwerken eingesetzt werden. Einige Beispiele sind Offshore-Gründungen, Brücken oder große, freitragende Hallen.
description: This article presents a novel construction method for columns made of ultra-high performance concrete (UHPC). It focuses on a reinforcement concept, which consists of a combination of steel sheets and carbon fabrics instead of a steel bar reinforcement. In comparison to conventional construction methods, the resulting construction shows a great potential to save own weight. UHPC is used in a way that is appropriate to the material and allows a sustainable concrete construction method. This article describes the reinforcement concept and design principles of the UHFB props. They are derived from experimental and numerical investigations described in this article. The components described in this article can be used in a wide variety of structures. Some examples are offshore foundations, bridges or large self-supporting halls.
Influence of stress on the degradation behavior of Mg LAE442 implant systems
Creators: name: Denkena, Berend
name: Köhler, Jens
name: Stieghorst, J.
name: Turger, Anke
name: Seitz, J.
name: Fau, D.R.
name: Wolters, L.
name: Angrisani, Nina
name: Reifenrath, Janin
name: Helmecke, Patrick
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Bioresorbable osteosynthesis magnesium LAE442 corrosion
subject: Compressive loads
subject: Corrosion behavior
subject: Cylindrical specimens
subject: Degradation behavior
subject: Microscopic image
subject: New Zealand White rabbit
subject: Osteosynthesis
subject: Rectangular samples
subject: Corrosive effects
subject: Magnesium
subject: Magnesium alloys
subject: Screws
subject: Tensile stress
subject: Corrosion rate
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In this paper the performance of a magnesium based implant system is analyzed. A special emphasis is placed on the impact of stress on the corrosion behavior of the magnesium alloy. An implant system containing a plate and 4 corresponding screws is machined from Mg LAE442. Its corrosion behavior is tested in-vivo in New Zealand White Rabbits for 6 and 12 weeks of implantation. The plate is monocortically fixated on the medial tibia. At the interface between screw and plate increased corrosion is observed. This phenomenon is stronger on the caudal side of the screw. Parallel to the in-vivo test the influence of stress load on the corrosion rate is analyzed for LAE442 in in-vitro tests. Compressive load is applied on cylindrical specimens in axial direction and the corrosion rate is measured in 0.9 wt% NaCl solution by eudiometry and mass loss. Additionally rectangular samples are bent to apply tensile stress on the surface. A drop of 5 wt% NaCl is deposited on the surface and the corrosion is evaluated by microscopic images. It is shown that stress essentially influences the corrosion rate. While tensile stress decreases the corrosion, compressive stress leads to higher corrosion rates.
Ion track reconstruction in 3D using alumina-based fluorescent nuclear track detectors
Creators: name: Niklas, Martin
name: Bartz, James A.
name: Akselrod, Mark S.
name: Abollahi, Amir
name: Jäkel, Oliver
name: Greilich, Steffen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Medical Physics (physics.med-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Fluorescent nuclear track detectors (FNTDs) based on Al2O3:C,Mg single crystal combined with confocal microscopy provide 3D information on ion tracks with a resolution only limited by light diffraction. FNTDs are also ideal substrates to be coated with cells to engineer cell-fluorescent ion track hybrid detectors. This radiobiological tool enables a novel platform linking cell responses to physical dose deposition on a sub-cellular level in proton and heavy ion therapies. To achieve spatial correlation between single ion hits in the cell coating and its biological response the ion traversals have to be reconstructed in 3D using the depth information gained by the FNTD read-out. FNTDs were coated with a confluent human lung adenocarcinoma epithelial cell layer. Carbon ion irradiation of the hybrid detector was performed perpendicular and angular to the detector surface. In-situ imaging of the fluorescently labeled cell layer and the FNTD was performed in a sequential read-out. Making use of the trajectory information provided by the FNTD the accuracy of 3D track reconstruction of single particles traversing the hybrid detector was studied. The accuracy is strongly influenced by the irradiation angle and therefore by complexity of the FNTD signal. Perpendicular irradiation results in highest accuracy with error of smaller than 0.10°. The ability of FNTD technology to provide accurate 3D ion track reconstruction makes it a powerful tool for radiobiological investigations in clinical ion beams, either being used as a substrate to be coated with living tissue or being implanted in vivo.
description: 20 pages, 6 figures
title: Performance management: θεωρητικό υπόβαθρο, βιβλιογραφική μελέτη και ποσοτική έρευνα για τα συστήματα διαχείρισης της απόδοσης
titleType: AlternativeTitle
Creators: name: Vappas, Meletios
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Συστήματα διαχείρισης της απόδοσης
Αξιολόγηση
Διοίκηση ανθρώπινου δυναμικού
Performance management systems
Human resource management

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Τεχνο-οικονομικά συστήματα”
A Survey on Information Retrieval, Text Categorization, and Web Crawling
Creators: name: Bassil, Youssef
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: This paper is a survey discussing Information Retrieval concepts, methods, and applications. It goes deep into the document and query modelling involved in IR systems, in addition to pre-processing operations such as removing stop words and searching by synonym techniques. The paper also tackles text categorization along with its application in neural networks and machine learning. Finally, the architecture of web crawlers is to be discussed shedding the light on how internet spiders index web documents and how they allow users to search for items on the web.
description: LACSC - Lebanese Association for Computational Sciences, http://www.lacsc.org
Inhomogeneous "longitudinal" circularly-polarized plane waves in anisotropic elastic crystals
Creators: name: Boulanger, Philippe
name: Destrade, Michel
name: Hayes, Michael A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Conditions on the elastic stiffnesses of anisotropic crystals are derived such that circularly polarized longitudinal inhomogeneous plane waves with an isotropic slowness bivector may propagate for any given direction of the normal to the sagittal plane. Once this direction is chosen, then the wave speed, the direction of propagation, and the direction of attenuation are expressed in terms of the mass density, the elastic stiffnesses, and the angle between the normal to the sagittal plane and the normals (also called "optic axes") to the planes of central circular section of a certain ellipsoid. In the special case where this angle is zero, and in this special case only, such waves cannot propagate.
Three-dimensional modeling of beam emission spectroscopy measurements in fusion plasmas
Creators: name: Guszejnov, D.
name: Pokol, G. I.
name: Pusztai, I.
name: Refy, D.
name: Zoletnik, S.
name: Lampert, M.
name: Nam, Y. U.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: One of the main diagnostic tools for measuring electron density profiles and the characteristics of long wavelength turbulent wave structures in fusion plasmas is Beam Emission Spectroscopy (BES). The increasing number of BES systems necessitated an accurate and comprehensive simulation of BES diagnostics, which in turn motivated the development of the RENATE simulation code that is the topic of this paper. RENATE is a modular, fully three-dimensional code incorporating all key features of BES systems from the atomic physics to the observation, including an advanced modeling of the optics. Thus RENATE can be used both in the interpretation of measured signals and the development of new BES systems. The most important components of the code have been successfully benchmarked against other simulation codes. The primary results have been validated against experimental data from the KSTAR tokamak.
description: 8 pages, 10 figures
title: Σταθμοί αποθήκευσης ηλεκτρικής ενέργειας στο σύγχρονο ενεργειακό περιβάλλον, ρόλος και προοπτικές
titleType: AlternativeTitle
Creators: name: Lytra, Ifigeneia-Paraskefi
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Αποθήκευση Ηλεκτρικής Ενέργειας
Μελέτη Εσόδων
Μπαταρίες Ιόντων Λιθίου
Ανανεώσιμες Πηγές Ενέργειας

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Τεχνο-οικονομικά συστήματα”
Efficient Compressive Sampling of Spatially Sparse Fields in Wireless Sensor Networks
Creators: name: Colonnese, Stefania
name: Cusani, Roberto
name: Rinauro, Stefano
name: Ruggiero, Giorgia
name: Scarano, Gaetano
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Wireless sensor networks (WSN), i.e. networks of autonomous, wireless sensing nodes spatially deployed over a geographical area, are often faced with acquisition of spatially sparse fields. In this paper, we present a novel bandwidth/energy efficient CS scheme for acquisition of spatially sparse fields in a WSN. The paper contribution is twofold. Firstly, we introduce a sparse, structured CS matrix and we analytically show that it allows accurate reconstruction of bidimensional spatially sparse signals, such as those occurring in several surveillance application. Secondly, we analytically evaluate the energy and bandwidth consumption of our CS scheme when it is applied to data acquisition in a WSN. Numerical results demonstrate that our CS scheme achieves significant energy and bandwidth savings wrt state-of-the-art approaches when employed for sensing a spatially sparse field by means of a WSN.
description: Submitted to EURASIP Journal on Advances in Signal Processing
Quasi-kontinuierliche Dehnungsmessungen an chemisch vorgespannten Balken
Creators: name: Zdanowicz, Katarzyna
name: Marx, Steffen
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: chemische Vorspannung
subject: Quellbeton
subject: quasikontinuierliche Dehnungsmessung
subject: faseroptische Sensoren
subject: chemical prestressing
subject: expansive concrete
subject: strain measurement
subject: distributed fibre optic sensor
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Quasikontinuierliche faseroptische Sensoren und Messungen mit einem optischen Reflektometer auf Basis der Rayleigh-Rückstreuung ermöglichen die Untersuchung von Dehnungsänderungen im Beton und in der Bewehrung. In diesem Beitrag werden die Ergebnisse einer solchen Messung von Längenänderungen bei der Aushärtung von Normal- und Quellbeton vorgestellt. Dieses Messverfahren eröffnet neue Perspektiven auch für chemisch vorgespannte Bauteile, da die Verformungen entlang der gesamten Elementlänge im Zeitverlauf untersucht werden können. Im Rahmen des Forschungsprojekts „Chemische Vorspannung von textilbewehrten Sichtbetonbauteilen mit Quellbeton“ wurden das Schwinden und das Quellen von neun axial bewehrten Betonbalken untersucht. Darüber hinaus konnte die Übertragungslänge bestimmt werden, nach der die Betondehnungen auf die Bewehrung übertragen werden.
description: Distributed fibre optic sensors and measurements conducted with an optical reflectometer based on Rayleigh scattering phenomenon allow to investigate strain changes in concrete and its reinforcement. Here results of measuring length changes during hardening of normal and expansive concrete are presented. This novel measurement method opens new possibilities for chemically prestressed elements, as the deformations along the total element length can be investigated in time. As a part of a research project “Chemical prestressing of thin textile reinforced concrete elements”, shrinkage and expansion of nine axially reinforced concrete beams were investigated. Furthermore, it was possible to determine the transfer length after which the concrete strains are transferred to the reinforcement.
title: Υποθαλάσσιος εντοπισμός υποβρύχιου ρομποτικού συστήματος για χαρτογράφηση θαλάσσιου περιβάλλοντος
titleType: AlternativeTitle
title: Underwater Positioning of Subsurface Robotic System for Monitoring the Marine Environment
Creators: name: Mertikas, Panagiotis
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Υποθαλάσσιος Εντοπισμός
Glider
Dimensional Control
USBL

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Ναυτική και Θαλάσσια Τεχνολογία και Επιστήμη”
Einfluss der Partikelwechselwirkung und der Hydratation auf die Rheologie von Zementsuspensionen
Creators: name: Link, Julian
name: Von Bronk, Tabea
name: Lohaus, Ludger
name: Haist, Michael
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: Zementsuspension
subject: Rheologie
subject: Hydratation
subject: Partikelwechselwirkung
subject: Thixotropie
subject: cement suspension
subject: rheology
subject: hydration
subject: particle interactions
subject: thixotropy
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Die Fließeigenschaften von Zementsuspensionen sind stark von der Thixotropie geprägt. Die thixotropen Eigenschaften sind unter anderem ein Resultat der vorangegangenen Scherbelastungen, die das Agglomerations- und Dispergierungsverhalten der Zementpartikel beeinflussen. Im vorliegenden Beitrag werden die thixotropen Eigenschaften in Abhängigkeit der Intensität der Vorscherung untersucht und es wird aufgezeigt, dass die Aufbaurate der dynamischen Viskosität sehr stark mit der Vorscherung in Zusammenhang steht. Im Werkstoff Beton erfährt der Zementleim eine zusätzliche Beeinflussung durch die vorhandene Gesteinskornung. Der Einfluss der Gesteinskornung auf die rheologischen Eigenschaften des Betonleims wird anhand vergleichender Untersuchungen von aus Betonen extrahierten Leimen und separat hergestellten reinen Zementleimen analysiert und diskutiert.
description: The rheological properties of cement suspensions are affected by thixotropy. The thixotropic properties are partially a result of pre-loadings controlling the agglomeration and dispersion state of cement particles. The dependence of thixotropic properties on the intensity of pre-shearing is investigated in this paper and a significant correlation of the structural build-up rate of the dynamic viscosity with the pre-shearing is shown. The cement paste in the concrete is additionally exposed to loadings caused by the presence of aggregates. The influence of aggregates on rheological properties of the paste is discussed by comparative investigations between pastes extracted from concrete and separately produced pure cement suspensions.
STUDY OF OPERATING MODES OF SMALL HPSS' HYDROELECTRIC UNITS EQUIPPED WITH SYNCHRONOUS GENERATOR
Creators: name: L.H. Hasanova
name: H.S. Aliyev
name: M.M. Musayev
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: small hydropower plants
Francis turbine
Pelton turbine
axial turbines
synchronous generator with electromagnetic excitation
electrical grid

description: A universal analytical expression is obtained for the power of hydraulic turbines of small hydropower plants such as Francis, Pelton and Kaplan with fixed blades as a function of water flow. This expression allows us to predict the generation of active power of each of the turbines, depending on the adjusted water flow rate, which varies in the seasonal, monthly and daily periods of the year. It also allows you to solve the inverse problem, when it is necessary, depending on the load schedule dictated by the electrical system to which these small hydroelectric power stations are connected, to regulate the amount of water flow by changing the opening angles of the guiding devices of the hydraulic turbines. Studies on the proposed mathematical model containing a synchronous generator with electromagnetic excitation coupled to a Francis hydraulic turbine with a 60% change in water flow from q=1 (r.u) to q=0.4 (r.u). The value of the required active power of a small hydroelectric power station, i.e. power output of the generator will jam (either by the dispatcher, or by the value of the load schedule), i.e. it is an input value, and as the output value of the controller is the opening angle of the guiding apparatus of the turbine.
Dependence of Nebular Heavy-Element Abundance on H I Content for Spiral Galaxies
Creators: name: Robertson, Paul
name: Shields, Gregory A.
name: Davé, Romeel
name: Blanc, Guillermo A.
name: Wright, Audrey
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze the galactic H I content and nebular log(O/H) for 60 spiral galaxies in the Moustakas et al. (2006) spectral catalog. After correcting for the mass-metallicity relationship, we show that the spirals in cluster environments show a positive correlation for log(O/H) on DEF, the galactic H I deficiency parameter, extending the results of previous analyses of the Virgo and Pegasus I clusters. Additionally, we show for the first time that galaxies in the field obey a similar dependence. The observed relationship between H I deficiency and galactic metallicity resembles similar trends shown by cosmological simulations of galaxy formation including inflows and outflows. These results indicate the previously observed metallicity-DEF correlation has a more universal interpretation than simply a cluster's effects on its member galaxies. Rather, we observe in all environments the stochastic effects of metal-poor infall as minor mergers and accretion help to build giant spirals.
description: Accepted for publication in ApJ
PertFlow: A cloud-based workflow to facilitate perturbational  modeling on single-cell transcriptomics for pharmacological research
Creators: name: George I. Gavriilidis
name: Sofoklis
name: Thomas
name: Konstantinos
name: Fotis
Publisher: name: Zenodo
Year: 2023

description: Perturbational modeling in single-cell -omics computationally captures, at unprecedented cellular resolution, responses to molecular changes initiated by gene knockdowns or drug treatments. Notwithstanding, relevant in silico tools are hindered by interoperability issues, hefty computational demands, and reliance on complex algorithms like Deep Learning that lack biological interpretation. 

Here, we introduce "PertFlow", a user-friendly, cloud-based workflow merging standard single-cell pipelines for scRNA-seq/ECCITE-seq with specialized perturbational modeling tools. 

PertFlow offers seamless Seurat and Scanpy interoperability through in-tandem Python and R coding (Rpy2 package). A Google Colab implementation of the method demonstrates the ease of deployment and allows for testing by other users.

At first, PertFlow enables pathway/transcription factor (TFs) enrichment (DecoupleR) to establish the necessary biological context. 

At its core, PertFlow employs AugurPy for cell-type prioritization, scGEN variational autoencoder for perturbation response prediction, and MixScape for assessing perturbations in single-cell pooled CRISPR screens (ECCITE-seq). Moreover, PertFlow also features the CPA compositional autoencoder for complex perturbational predictions and the ASGARD toolkit for drug repurposing based on LINCS L1000 project data.

When applied to Chronic Lymphocytic Leukemia (CLL) scRNA-seq data from peripheral blood cells, pre/post-Ibrutinib therapy (PMID: 31996669), PertFlow was able to capture biological ground truths (suppression of oxidative phosphorylation)(DecoupleR), but also went beyond them, showing: (a) cell prioritization of monocytes 30 days post-Ibrutinib and implication of galectins in a poor CLL Ibrutinib responder (AugurPy), (b) perturbational predictions for CLL-geared TFs like IRF1 (MixScape) (c) repurposed drugs mimicking Ibrutinib’s effects like auranofin, fostamatinib, parthenolide, vorinostat, idelalisib and sonidegib   (ASGARD).
description: https://github.com/BiodataAnalysisGroup/PertFlow_A-cloud-based-workflow-for-scRNA-seq-perturbational-modeling
Screening and gap generation in bilayer graphene
Creators: name: Stroucken, Tineke
name: Grönqvist, Johanna H.
name: Koch, Stephan. W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A fully selfconsistent treatment for gap generation and Coulomb screening in excitonic insulators is presented. The method is based on the equations of motion for the relevant dynamical variables combined with a variational approach. Applying the theory for a model system of bilayer graphene, an excitonic groundstate with a gap exceeding 10 meV is predicted.
description: 15 pages, 5 figures
title: Επίδραση των ERP συστημάτων στην αξιολόγηση προσωπικού και τη διαχείριση ανταμοιβών: Συγκριτική ανάλυση αντιλήψεων του προσωπικού σε οργανισμούς με πλήρη υιοθέτηση ERP
titleType: AlternativeTitle
Creators: name: Tzitzivakos, Efstratios
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Διαχείριση ανταμοιβών
ERP συστήματα
Αξιολόγηση προσωπικού
ERP systems
Human resources

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Τεχνο-οικονομικά συστήματα”
THE APPLICATION OF QUEUEING THEORY FOR MAXIMIZING SYSTEM SIZE USING ENCOURAGED ARRIVAL
Creators: name: S. Immaculate
name: P. Rajendran
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Encouraged arrival
Assembly Line
Queuing Analysis
Stopwatch time study
Steady state Solution

description: Customers are frequently drawn in by lucrative deals and discounts offered by businesses. These interested customers are referred to as encouraged arrivals. The major goal of this study is to evaluate the performance of the automobile assembly line in order to decrease waiting time by coordinating the activities at each workstation using stopwatch time study approach. The novelty of this research is to convert poisson arrival to encouraged arrival with some discounts (like.,10%, 20%). The queuing problem is represented by the notation M/M/1: FCFS/∞/∞ in Kendall's notation. It is a single channel, multi-server service with infinite system capacity and an infinite number of calling population. Data concerning the system's encouraged arrival and service distribution were established. These data were used to calculate the system performance parameter. The finding of the study was used to predict the system's performance and effectiveness and to make logical recommendations for possible future improvements. According to the results, it is possible to conclude that increasing the level of automation reduces part waiting time, decreasing the cost of waiting. When compared to the poisson arrival system, the size of the Markovian encouraged arrival queuing system is increased as shown in the table. Little’s law is verified that system size and queue size is same as in length. Little's law is used to predicts lead time based on production rate and work-inprocess. Here it is verified as shown in table.
Non-Hermitian CP-Symmetric Dirac Hamiltonians with Real Energy Eigenvalues
Creators: name: Alhaidari, A. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a large class of non-Hermitian non-PT-symmetric two-component Dirac Hamiltoninas with real energy spectra. These Hamiltonians are invariant under the combined action of "charge" conjugation (two-component transpose) and space-parity. Examples are given from the two subclasses of these systems having localized and/or continuum states with real energies.
description: 8 pages, 2 tables, 2 figures
Kinematic and stochastic surface topography of machined tial6v4-parts by means of ball nose end milling
Creators: name: Denkena, Berend
name: Böß, Volker
name: Nespor, D.
name: Samp, A.
Publisher: name: Amsterdam : Elsevier BV
Year: 2011
Subjects: subject: Milling
subject: Titanium
subject: Topography
subject: Computed topography
subject: End mill
subject: End milling
subject: Functional parts
subject: Machined surface
subject: Process forces
subject: Process parameters
subject: Stochastic surfaces
subject: Subsurface properties
subject: Surface integrity
subject: TiAl6V4
subject: Aerospace industry
subject: Ball milling
subject: Comminution
subject: Kinematics
subject: Milling (machining)
subject: Stochastic systems
subject: Surface measurement
subject: Tools
subject: Surface topography
subject: Konferenzschrift
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik
subject: Dewey Decimal Classification::600 | Technik

description: Ball nose end mills are usually applied during 5-axes machining of high functional parts especially in the aerospace industry. The systematical study of the relationship between process forces and kinematics, surface topography and subsurface properties is fundamental to ensure a high surface integrity. This paper deals with the topography of machined surfaces of TiAl6V4 parts by means of ball nose end milling. The machined surface has been analyzed and the kinematic topography, influenced by the process parameters and the geometry of the cutting tool, has been computed. By subtracting the surface measurements from the computed topography, the stochastic topography of the machined surface, e.g. roughness and cracks, can be determined. Furthermore, an approach is given for predicting the stochastic topography based on the process forces during machining of TiAl6V4. © 2011 Published by Elsevier Ltd.
title: Осмысление природы художественного творчества в романе В.Пелевина «t»
Creators: name: Цветкова, Ольга
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Древнерусские книжники зачастую считали творческий вымысел греховным. В светской литературе Нового времени вымышленность представляется основной чертой художественности. В.Пелевин в своем романе «t» отчасти возвращается к началам древнерусской книжности и рассматривает художественный вымысел как грех, за который художник слова должен понести наказание. Осмысление природы творческого вымысла в духе древнерусской словесности является существенной особенностью замысла романа «t». Главный герой романа граф Т. (прототип — Лев Толстой) после смерти наказан за своевольную творческую деятельность тем, что сам становится героем чужого произведения. В сюжете романа выявляется магический демонический характер связи между «творцом» и «творением» при творческой установке на произвольное воображение.