cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Performance comparison of temperature sensors for closed cycles operating with supercritical CO2
Creators: name: Belleoud, Pierre
name: Anselmi Palma, Eduardo
name: Chetwynd-Chatwin, Jason
name: Roumeliotis, Ioannis
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: Instrumentation
subject: Uncertainties
subject: Thermocouples
subject: Supercritical CO2
subject: Transient
subject: 620

description: Near the critical point of carbon dioxide (CO2), small changes in temperature or pressure can result in large changes in the calculation of its thermodynamic properties, thus the right choice of instrumentation is of importance. This paper addresses the challenges related to CO2 temperature measurement in smalldiameter pipes and assesses different sensors utilizing Cranfield University’s supercritical CO2 test rig capabilities. In order to compare temperature sensor types for supercritical CO2, a test tube has been designed to fit different sizes of temperature probes at the discharge of the transcritical compressors at the sCO2 test rig. Different diameters of thermocouples (0.75 to 4.5 mm), Resistance Temperature Detectors (RTDs) and surface sensors were tested and compared in terms of amplitude and adaptability to sudden temperature changes. Results for different fluid conditions in the supercritical region of CO2 were derived. The use of thermowell is discussed as it can offer a suitable compromise between practicality and ‘internal’ measurements. The results presented in this paper aim to provide a comparison of temperature sensors’ performances for different regimes, transient or steady state.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 153
title: Weiblich – muslimisch – sportengagiert: Eine intersektionale Analyse sportbezogener Biografien türkeistämmiger Frauen in Deutschland
Creators: name: Fast, Natalia
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2022, no. 51, p. 94
title: Studierende mit Kind(ern) – Herausforderungen, Bedürfnisse und Perspektiven
Creators: name: Demir, Zeynep
name: Groening-Lienker, Katharina
name: Lüüs, Alexandra
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2022, no. 51, p. 104
title: Design of an axial sCO2 turbine for a demo plant in an industrial environment
Creators: name: Glos, Stefan
name: Musch, Christian
name: Stueer, Carmen
name: Schlehuber, Dominic
name: Wechsung, Michael
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: Energy conversion processes based on supercritical carbon dioxide (sCO2) are being investigated in the field of scientific and industrial power engineering due to the great potential in terms of compactness and efficiency. The working fluid CO2 poses a number of challenges for turbine design and aerodynamic optimization. Due to the high density of the working fluid CO2, which is associated with high losses at high velocities, special attention must be paid to aerodynamic optimization. In addition, fluid density can affect rotordynamic stability. The significantly higher demands on seals, both within the turbine and for sealing against the environment, require new sealing concepts that meet the requirements for performance and operational safety. In this paper the development of an axial turbine for a demo plant application in an industrial environment is discussed in terms of topology, technology and optimization approaches and the resulting design concept is presented. Aero-and rotodynamic details of the specific challenges coming from the working fluid CO2 are discussed as well as material aspects and the system integration in a power cycle concept. Furthermore, the scalability to larger power output and process temperatures is described.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 162
title: Analysis of the potential of CO2 based mixtures to improve the efficiency of cogenerative waste heat recovery power plants
Creators: name: Morosini, Ettore
name: Doninelli, Michele
name: Alfani, Dario
name: Astolfi, Marco
name: Di Marcoberardino, Gioele
name: Manzolini, Giampaolo
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: The waste heat potentially available from a wide range of industrial processes still represents a significant fraction of the primary energy consumption related to the processes. Some of the most energy intensive processes can be categorized in the iron, steel and glass production, the fine chemical industry, and the production of non-ferrous materials such as cement, polymers, paper or in the textile industry. Of the overall thermal energy rejected in the environment, a part of it is feasibly exploitable from a technical and economical point of view in waste heat recovery plants. This work proposes innovative solutions for waste heat recovery cycles working with sCO2 cycles and transcritical cycles adopting CO2-mixtures. As the heat rejection from these cycles is non-isothermal, these power plants are particularly suitable to be used in CHP configuration, therefore transferring heat to a stream of pressurized water at high temperature, up to 200°C. When a waste heat source available at 450°C is considered, assuming a stack temperature of 125°C, the proposed sCO2 power cycle can convert around 12% of the thermal input in electricity and 87% in useful heat above 60°C, while a cycle working with the CO2+Acetonitrile mixture can deliver 15.5% of the thermal input in electricity while still recovering the remaining more than 80% in useful heat above 60°C. CO2 based mixtures are therefore suggested for power cycles in CHP configuration to reach nominal electric efficiencies higher than sCO2, avoiding the consumptions of natural gas to produce the same amount of electricity and heat with separated systems.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 169
Review of China's forest CoC certification system against its illegal logging and trade
Creators: name: Xu, Jinheng
Publisher: name: The University of British Columbia
Year: 2014

description: Illegal logging and trade have attracted broad attention internationally these years. The unlawful harvesting and business activities including logging without tenures, cutting in unpermitted sites, importing illegal timber, tax evasion, etc. cause environmental damage and dramatic social and economic losses globally. To curb illegal logging and relative trade, third party forest certification and Chain of Custody (CoC) are introduced to the world as two available tools. China also enrolled in this combat against illegal logging and trade with its abundant forest resources and frequent illegal cutting and trade behaviors. Since China’s own forest CoC certification scheme achieves endorsement of the largest forest certification organization over the world named PEFC (Programme for the Endorsement of Forest Certification), China is experiencing great challenges and opportunities to benefit from this global certification trend. A review of the status quo of global illegal logging and trade, the development and regulation of the world’s certification schemes, and China’s efforts into forest CoC certification will be discussed in the essay.
title: Part load analysis of a constant inventory supercritical CO2 power plant for waste heat recovery in cement industry
Creators: name: Alfani, Dario
name: Astolfi, Marco
name: Binotti, Marco
name: Silva, Paolo
name: Persico, Giacomo
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: The present work investigates the part-load performance of a MW-scale sCO2 power plant designed as heat recovery unit for an existing cement plant located in Czech Republic, in the framework of the H2020 funded project CO2OLHEAT. The study firstly presents the selected power plant configuration and then focuses on the evaluation of its part load operation due to variation of flue gas mass flow rate and temperature. The range of flue gas conditions at the outlet of the upstream process is retrieved from a preliminary statistical analysis of historical trends obtained through the cement plant monitoring. The numerical model developed for this study aims at providing realistic results thanks to the adoption of turbomachinery performance maps provided by the project partners. Moreover, heat exchangers have been modelled through a discretized approach which has been validated against manufacturer data, while piping inventory and pressure losses have been assessed through a preliminary sizing that considers the actual distances to be covered in the cement plant. Performance decay is estimated for the whole range of flue gas conditions, reporting the most significant power cycle parameters, and identifying the main causes of efficiency loss. The part-load analysis is carried out considering a constant CO2 inventory, in order to reduce the system complexity and capital cost and simplify plant operation. Results show that the operation entails minor variation of the compressors operative points in the whole range of operating conditions of the cement plant, avoiding the risk of anti-surge bypass activation. Moreover, the plant is able to work at nearly constant thermodynamic cycle efficiency (20.5%-23.0%) for most of the year and benefits from part-load operation in terms of overall performance. These predictions will be used, in next steps of the project, to guide the definition of power plant control during transients related to changes of upstream process conditions or specific needs of power output control
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 179
Ganaxolone: First Approval
Creators: name: Lamb, Yvette
Publisher: name: Adis Journals
Year: 2022
Subjects: subject: Medicine
subject: 110904 Neurology and Neuromuscular Diseases
subject: FOS: Clinical medicine

description: Declarations Funding The preparation of this review was not supported by any external funding. Authorship and Conflict of interest During the peer review process the manufacturer of the agent under review was offered an opportunity to comment on the article. Changes resulting from any comments received were made by the authors on the basis of scientific completeness and accuracy. Yvette Lamb is a salaried employee of Adis International Ltd/Springer Nature, and declares no relevant conflicts of interest. All authors contributed to the review and are responsible for the article content. Ethics approval, Consent to participate and consent for publication, Availability of data and material, Code availability Not applicable. Additional information about this Adis Drug Review can be found here Abstract Ganaxolone (ZTALMY®; Marinus Pharmaceuticals) is a synthetic neuroactive steroid that acts as a positive allosteric modulator of the gamma-aminobutyric acid (GABA)A receptor complex. Ganaxolone received its first approval in March 2022 in the USA for the treatment of seizures associated with cyclin-dependent kinase-like 5 (CDKL5) deficiency disorder (CDD) in patients 2 years of age and older. Approval was based on the results of a multinational phase III trial, in which ganaxolone was effective in reducing seizure frequency in children and adolescents with CDD. In the EU, a Marketing Authorization Application has been filed for ganaxolone in the treatment of seizures associated with CDD and an opinion from the Committee for Medicinal Products for Human Use is expected later this year. Oral ganaxolone is also currently undergoing phase III evaluation in the treatment of tuberous sclerosis complex-related epilepsy, while an intravenous formulation of ganaxolone is being evaluated in refractory status epilepticus. This article summarizes the milestones in the development of ganaxolone leading to this first approval for seizures associated with CDD. © Springer Nature Switzerland AG 2022
title: Modeling of Autonomous Brayton Cycle Loop with GAMMA+ code for Micro Modular Reactor Simulation Application
Creators: name: Choi, Sungwook
name: Lee, Jeong
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: The Supercritical carbon dioxide (S-CO2) cycle is considered as a promising power conversion system for numerous power applications, because it has relatively high thermal efficiency and compact component size. This paper shows the validation of GAMMA+ code, which was originally developed by Korea Atomic Energy Research Institute to analyze the gas-cooled reactors, by comparing the experimental data obtained from Autonomous Brayton Cycle (ABC) loop constructed in Korea Advanced Institute of Science and Technology (KAIST) and calculation result from the code. ABC loop is a simple recuperated closed S-CO2 Brayton cycle constructed by the KAIST research team. ABC loop consists of a turbine-alternator-compressor (TAC), electric heater, recuperator, precooler and control valves. Previously, GAMMA+ code was already validated with the experimental data obtained from SCO2PE and SCIEL facilities. In contrast to the ABC loop, only cooling and compression of the S-CO2 were tested. With ABC loop, not only cooling and compression of the S-CO2 were tested, but also the heating and recuperation were experimented. The ABC loop was modeled using GAMMA+ code and the calculation from the code is in accordance with the experimental data. Thus, GAMMA+ code can accurately simulate the S-CO2 system in the future, for example a Micro Modular Reactor (MMR) utilizing as S-CO2 power system.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 186
High-speed UDP Data Transmission with Multithreading and Automatic Resource Allocation
Creators: name: Syzov, Dmytro.
name: Kachan, Dmitry
name: Siemens, Eduard
Publisher: name: Hochschule Anhalt
Year: 2016
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: 537 Elektrizität, Elektronik

description: Proceedings of the International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2016). Jg. 4 . Köthen, 2016
description: In this paper a utilization of the high data-rates channels by threading of sending and receiving is studied. As a communication technology evolves the higher speeds are used more and more in various applications. But generating traffic with Gbps data-rates also brings some complications. Especially if UDP protocol is used and it is necessary to avoid packet fragmentation, for example for high-speed reliable transport protocols based on UDP. For such situation the Ethernet network packet size has to correspond to standard 1500 bytes MTU[1], which is widely used in the Internet. System may not has enough capacity to send messages with necessary rate in a single-threaded mode. A possible solution is to use more threads. It can be efficient on widespread multicore systems. Also the fact that in real network non-constant data flow can be expected brings another object of study –- an automatic adaptation to the traffic which is changing during runtime. Cases investigated in this paper include adjusting number of threads to a given speed and keeping speed on a given rate when CPU gets heavily loaded by other processes while sending data.
title: 01|2021 - Ausgabe 5
Creators: name: :None
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: 370

description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2021, no. 01
title: Bringt Transformation in die Schulgeographie
Creators: name: Rohmann, Nikolai
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: Transformation
subject: Geographiedidaktik
subject: BNE
subject: Postkoloniale Theorie
subject: Geography didactics
subject: education for Sustainable Development
subject: Post-colonial Theory
subject: 370

description: The contribution uses four theses to illustrate the positive effect of establishing the concept of transformation more strongly in geography didactics and the discourse around school geography. It discusses what contribution a focus on transformation can make in the follo-wing areas: 1) the debate in school policy discourse, 2) competencies; the establishment of a transformation competence, 3) problems of education for sustainable development (ESD), and 4) curriculum and educational plans and post-colonial theory.
description: Der Diskussionsbeitrag verdeutlicht anhand von vier Thesen, welchen positiven Effekt es ha-ben könnte, den Begriff der Transformation stärker in der Geographiedidaktik und in dem Diskurs um die Schulgeographie zu etablieren. Besprochen wird, welchen Beitrag ein Fokus auf Transformation in den folgenden Bereichen leisten kann: 1) Die Debatte im schulpoliti-schen Diskurs, 2) Kompetenzen; die Etablierung einer Transformationskompetenz, 3) Prob-leme von Bildung für nachhaltige Entwicklung (BNE) und 4) Lehr- und Bildungspläne und Postkoloniale Theorie.
description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2021, no. 0101|2021 - Ausgabe 5, p. 4
title: „10/10, would recommend!“: Wie Studierende ein Projekt des Forschenden Lernens erleben
Creators: name: Hayk, Ann-Christin
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: Inquiry-based learning
subject: practically oriented
subject: research methodology
subject: student research
subject: bus and bike-lane project
subject: Forschendes Lernen
subject: praxisnah
subject: Methodenausbildung
subject: studentische Forschung
subject: Umweltspurprojekt
subject: 370

description: Increasing student participation in research projects at German universities (inquiry-based learning) is a major claim since the 1970s. Currently, a group of students at the University of Trier conducts a research project in the sense of inquiry-based learning on behalf of the municipal planning agency. Involved students, who responded to a questionnaire about the project. In doing so, they provided rare insights into their individual perception of the project. Their highly positive opinion supports the claim for more inquiry-based learning.
description: Seit langem wird mehr studentische Teilhabe an der Forschungspraxis an deutschen Uni-versitäten (Forschendes Lernen) gefordert. An der Universität Trier bearbeitete ein studen-tisches Forscher*innenteam im Sinne des Forschenden Lernens ein Projekt im Auftrag des städtischen Planungsamtes. Eine Umfrage zur Projektarbeit unter den Studierenden gewährt seltene Einblicke in deren Wahrnehmung des Forschenden Lernens. Dabei zeichnen sie ein positives Bild von ihrer gemeinsamen Forschungsarbeit, das die Forderung nach mehr For-schendem Lernen unterstützt.
description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2021, no. 0101|2021 - Ausgabe 5, p. 12
Fire history near Cranbrook, British Columbia : historical reconstruction using tree-ring evidence
Creators: name: Villemaire-Côté, Olivier
Publisher: name: The University of British Columbia
Year: 2015

description: In this study, I used dendrochronology to create high-resolution annually-resolved fire chronologies for two sites (CRN2 and CRN4) located near Cranbrook, BC. The CRN2 site included eight fires over 252 years, with a mean fire interval of 34.1 years and a time since last fire of 56 years. The CRN4 site included 13 fires over 269 years, with a mean fire interval of 19.7 years and a time since last fire of 130 years. Low-severity fires have burned through both sites in 1718 and 1869, and fire intervals are consistent with other regional studies. Other fires identified in this study also burned in the Cranbrook area in 1665, 1718, 1751, 1802, 1831, 1869 and 1910. The 1910 fire is clear at CRN2, and appears as a stand replacing fire in CRN4. These chronologies reinforce the regional fire history knowledge and will be used to validate paleoecological work done in the neighbouring lakes. Combining dendrochronological and paleoecological data allows the creation of fire chronologies going back thousands of years. This study contributes to knowledge of historical fire regimes needed to understand the effects of climate change and fire suppression on the landscape, both important for future land management decisions.
title: ViKla – Virtuelle Klassenfahrten in der Schule: Potenziale der Digitalisierung im Fremdsprachenunterricht nutzen
Creators: name: Lemke, Ilka
name: Bary, Katharina
name: Ingenillen, Sophie
name: Liebel, Carina
name: Drackert, Anastasia
name: Lücke, Nicole
name: Scheudoschi, Romina
name: Visser, Judith
name: Rothstein, Björn
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: 370

description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2021, no. 0101|2021 - Ausgabe 5, p. 27
title: 02|2020 - Ausgabe 4
Creators: name: :None
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: 370

description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2020, no. 02
title: Optimisation of the air channels on the Diverse Ultimate Heat Sink for sCO2 power cycles
Creators: name: Filip, Radomír
name: Tioual-Demange, Sarah
name: Taiclet, Guillaume
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: During the Horizon 2020 sCO2-4-NPP project, several key components for the sCO2 power cycle as an option for the innovative decay heat removal system for nuclear power plants were developed. One of them was the diverse ultimate heat sink (DUHS), which is an air/sCO2 plate and fin heat exchanger with straight fins. A representative DUHS mock-up was manufactured and its thermal–hydraulic performance was tested using the sCO2 loop at Research Centre Rez (CVR) at parameters of 8 MPa of pressure and temperatures up to 170°C on the sCO2 side. The main findings were the acquisition of the heat transfer correlation on the air side of the heat exchanger and the fanning friction factor in the tiny channels. The collected data were used to verify the heat exchanger design and, moreover, a mathematical model was developed and validated. Furthermore an optimisation study was done using the validated model to find the best channel geometry with the trade-off between high heat transfer coefficient and low pressure losses.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 194
Forest management and carbon storage in British Columbia
Creators: name: Xu, Yuanyuan
Publisher: name: The University of British Columbia
Year: 2014

description: Forest ecosystems play a significant role in the global carbon cycle. Through the process of photosynthesis, live trees are able to sequester carbon from the atmosphere and store it in biomass and soil, which helps to ease climate change. Besides above ground woody biomass, forest soil is another critical part of carbon storage; about 58% of the carbon in a forest stand is stored in soil. With disturbance (e.g., harvesting, fire, insects infection), forests release carbon dioxide to the atmosphere, converting forests from a net carbon sink to a carbon source. Forest management activities can either increase or decrease the carbon storage of forests. In general, reducing the harvest level, extending rotation intervals and replacing clear cutting harvest systems will reduce carbon emissions during and post disturbance. Protecting forests from fire and insects infection also significantly contributes to carbon sequestration and help reducing carbon emissions. The outbreak of mountain pine beetle is the main factor that converted BC from a carbon sink to a carbon source since 2003. Thus, addressing effective solutions to control the mountain pine beetle population is critical for carbon recovery in BC province.
title: Partizipation im Kontext digitaler Geomedien und geographischer Lehrkräftebildung: Eine explorative Studie zu den Gelingensbedingungen für die Förderung partizipativer Fähigkeiten
Creators: name: Lauffenburger, Melanie
name: Biersack, Jan
name: Kanwischer, Detlef
name: Schulze, Uwe
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: participation
subject: participatory skills
subject: geo-media
subject: teacher education
subject: portfolio
subject: Partizipation
subject: partizipative Fähigkeiten
subject: digitale Geomedien
subject: Lehrkräftebildung
subject: 370

description: Digital geo-media and social networks offer plenty opportunities for participation on the Web 2.0 which require participatory skills as a prerequisite for their proper use. The exploratory analysis of eight e-portfolios written by geography teacher students shows on the one hand that the students have only limited participatory skills. On the other hand, the following conditions for success, which explicitly stimulate the development and expansion of participatory skills, are determined: concrete questions and tasks for active participation in social discourses, a learning environment designed for active participation and the creation of specific occasions for the use of social networks as „opportunity spaces” for democratic participation.
description: Digitale Geomedien und soziale Netzwerke bieten im Web 2.0 eine Vielzahl an Partizipations-möglichkeiten, für deren mündige Nutzung es partizipativer Fähigkeiten bedarf. Die explorative Analyse von acht E-Portfolios von Lehramtsstudierenden der Geographie zeigt einerseits, dass diese nur bedingt über partizipative Fähigkeiten verfügen. Andererseits konnten u.a. folgende Gelingensbedingungen eruiert werden, die den Auf- und Ausbau partizipativer Fähigkeiten explizit anregen: Konkrete Frage- und Aufgabenstellungen zur aktiven Teilhabe an gesellschaftlichen Diskursen, eine auf aktive Mitgestaltung konzipierte Lernumgebung und die Gestaltung konkreter Anlässe zur Nutzung sozialer Netzwerke als „Möglichkeitsräume“ demokratischer Teilhabe.
description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2020, no. 0202|2020 - Ausgabe 4, p. 4
High-speed UDP Data Transmission with Multithreading and Automatic Resource Allocation
Creators: name: Maksymov, Sergii
name: Kachan, Dmitry
name: Siemens, Eduard
Publisher: name: Hochschule Anhalt
Year: 2016
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: 537 Elektrizität, Elektronik

description: Proceedings of the International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2016). Jg. 4 . Köthen, 2016
description: Connection establishment is a fundamental function for any connection-oriented network protocol and the efficiency of this function defines the flexibility and responsiveness of the protocol. This process initializes data transmission and performs transmission parameters negotiation, what makes it mandatory process and integral part of entire transmission. Thus, the duration of the connection establishment will affect the transmission process duration. This paper describes an implementation of a handshake algorithm, designed for connection with multiple peers, that is used in Reliable Multi-Destination Transport(RMDT) protocol, its optimization and testing.
Microwave-coupled optical bistability in driven and interacting Rydberg gases
Creators: name: Zhang, Zhehua
name: Zhang, Zeyan
name: Han, Shaoxing
name: Zhang, Yuqing
name: Zhang, Guoqing
name: Wu, Jizhou
name: Sovkov, Vladimir B.
name: Liu, Wenliang
name: Li, Yuqing
name: Zhang, Linjie
name: Xiao, Liantuan
name: Jia, Suotang
name: Li, Weibin
name: Ma, Jie
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Nonequilibrium dynamics are closely related to various fields of research, in which vastly different phases emerge when parameters are changed. However, it is difficult to construct nonequilibrium systems that have sufficiently tunable controllable parameters. Using microwave field coupling induced optical bistability, Rydberg gases exhibit a range of significantly different optical responses. In conjunction with electromagnetically induced transparency, the microwave coupling can create versatile nonequilibrium dynamics. In particular, the microwave coupling of two Rydberg states provides an additional handle for controlling the dynamics. And the microwave-controlled nonequilibrium phase transition has the potential to be applied in microwave field measurement. This study opens a new avenue to exploring bistable dynamics using microwave-coupled Rydberg gases, and developing quantum technological applications.
description: 10 page,5 figure
title: Lehrkräftebildung aus einem Guss? Interaktionsdynamiken in phasenübergreifenden Lernarrangements zum Themenschwerpunkt „Inter- und Transkulturelles Lernen“
Creators: name: Chihab, Laura
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: reflexive teacher education
subject: cross-sectoral education
subject: hybrid space
subject: transcultural learning
subject: professional development
subject: Reflexive Lehrkräftebildung
subject: Phasenübergreifend
subject: Hybride Räume
subject: Transkulturelles Lernen
subject: Professionalisierung
subject: 370

description: In the course of enduring demands for an enhanced integration of theory and practice across all stages of teacher education, discussions on learning in hybrid spaces increase. It is yet to be identified which dynamics of interaction emerge between student teachers and inservice teachers, if both groups consider themselves as learners, and what consequences may arise for their academic and reflexive professional development. In a two-day workshop across different stages of teacher education dealing with the topic of “Potentials of Digital Learning Contexts in Inter- and Transcultural Learning”, two dynamics of interaction were reconstructed: a complementary and a confrontational dynamic. Especially the latter one appears to be a fruitful starting point for further reflection on own habitual orientations.
description: Im Rahmen beständiger Forderungen nach einer qualitätvollen Verzahnung von theoreti-schen und praktischen Bezügen in allen Phasen der Lehrkräftebildung wird das Lernen in hybriden Räumen diskutiert. Offen bleibt hierbei die Frage, welche Interaktionsdynamiken zwischen Studierenden und Lehrkräften auftreten, wenn sich beide Akteursgruppen als Lernende verstehen und welche Konsequenzen sich daraus für eine wissenschaftlich-reflexive Professionalisierung ergeben. In einem zweitägigen phasenübergreifenden Lernarrangement zum Thema „Potenziale digitaler Lernkontexte für Inter- und Transkulturelles Lernen“, wurden sowohl austauschend-ergänzende, als auch konfrontative Interaktionsdynamiken rekonstruiert. Insbesondere letztere können hierbei als fruchtbarer Ansatzpunkt für weiterführende Reflexionen eigener Orientierungen dienen.
description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2020, no. 0202|2020 - Ausgabe 4, p. 16
Impacts of climate change on Amazon forest fire
Creators: name: Peng, Yuan
Publisher: name: The University of British Columbia
Year: 2014

description: With the temperature rising caused by the global climate change, forest fire season has increased longer and fire severity in the Amazon has been more intense. Some extreme drought events in the Amazon in 2005 and 2010 caused severe fire activities during the fire season. The effects of climate change on forest fires in the Amazon have been discussed in the paper. Warming temperatures have increased the forest dry season; subsequent fires have higher intensity and severity, with fire season expansion in the Amazon forest. Some data and research proved that dry seasons would affect the fire season and fire activity. The consequence of forest fires in the Amazon on environmental conditions, economic development, and human health has been discussed in the paper as well. Greenhouse gas, timber products profits reduction, and harmful smoke release are the three major negative impacts caused by forest fires. Forest fire can produce a large amount of carbon dioxide into the atmosphere and release smoke, which makes environment conditions worse and can harm human health. Additional timber loss due to forest fire causes timber industry loss as well. What’s more, fire monitoring, sustainable management, law enforcement, and afforestation are suggested in the paper as solutions in the recommendations section.
title: Performance analysis of PTES layouts evolving sCO2 for industrial WHR integration
Creators: name: Maccarini, Simone
name: Barberis, Stefano
name: Mehdi, Shamsi
name: Gini, Lorenzo
name: Traverso, Alberto
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: A consistent amount of renewable energy (RES) from nonpredictable sources in the energy mix brings an increasing need of energy storage technologies to support grid stability. At the same time, electrification of industrial processes as well as the more and more common habit of industries to self-produce power via RES or CHP, can make industries a partner in disrupting grid stability. Thermo-mechanical storages can contribute through the use of traditional technologies (rotating machinery) employed in power plants, which are currently used to manage peak demand and grid services, and typically classify as hours-size storages, also capable of providing spinning reserve services to the electrical grid. Among such type of storages, Pumped Thermal Energy Storages (PTES) are a promising technology that enhance the concept of power-toheat-to-power and long duration energy storage, and presents also different layouts and applications. This paper analyse the thermal performance of Pumped Thermal Electricity Storage (PTES) evolving supercritical CO2 (sCO2), comparing different layouts, while valorising waste heat (WH) sources, which are typically in temperature ranges of 100-400°C. WH temperature in this range are difficult to be exploited for traditional energy generation, but they are currently under investigation for the possibility to be valorised via High Temperature Heat Pump. In this sense this quality of Waste Heat could be valorised via PTES. In fact, the use of additional heat, otherwise dumped to ambient, may make the system capable of an apparent round-trip efficiency (RTE) higher than 100%. The use of sCO2 could enhance the techno-economic features of these systems, if compared to similar plants evolving steam or air. Starting from an identified reference case (a cement production plant with WH temperature to be valorized around 350°C), a sCO2-based PTES cycle is presented and analysed in this paper. The waste heat integration to the PTES system has been found to add an undeniable value in terms of RTE. The use of sCO2 enhances the techno-economic features of these systems, the independent charging and discharging system proposed in this study can also provide a keen sense of flexibility. At the same time, the valorisation of low temperature waste heat enables industries to enhance their energy efficiency, limit their operational costs and environmental impact, whilst becoming an active part in the regulation of the grid. Nevertheless, CAPEX of the proposed systems are still quite relevant and only a robust exploitation of the PTES in ancillary service market could attract industrial customers interest on sCO2 PTES.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 206
title: The steady behavior of the supercritical carbon dioxide natural circulation loop
Creators: name: Draskic, Marko
name: Bugeat, Benjamin
name: Pecnik, Rene
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: The steady state behavior of thermodynamically supercritical natural circulation loops (NCLs) is investigated in this work. Experimental steady state results with supercritical carbon dioxide are presented for reduced pressures in the range of 1.1-1.5, and temperatures in the range of 20-65 ◦C. Distinct thermodynamic states are reached by traversing a set of isochors. A generalized equation for the prediction of the steady state is presented, and its performance is assessed using empirical data. Changes of mass flow rate as a result of changes of thermodynamic state, heatingand driving height are shown to be accurately captured by the proposed predictive equation. However, the enhanced viscous losses in the instrumentation of the loop and in the proximity of heat transfer equipment are shown to significantly limit the steady state flow rate. Subsequently, the findings are put forward in aid of the development of safe, novel supercritical natural circulation facilities.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 217
Supplementary document for Automatic rock classification of LIBS combined with 1DCNN based on improved Bayesian optimization - 6159990.pdf
Creators: name: song, GUANGDONG
name: Zhu, Shengen
name: Zhang, WenHAO
name: Hu, Binxin
name: Zhu, Feng
name: Zhang, Hua
name: Sun, Tong
name: Grattan, K.
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Figure S1, Table S1, Figure S2
title: Thermodynamic Analysis of a Reactive Particle-to-sCO2 Heat Exchanger for Recovering Stored Thermochemical Energy
Creators: name: Siefering, Bryan
name: Umer, Muhammad
name: Stechel, Ellen
name: Fronk, Brian
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: The objective of this paper is to investigate the effect of offdesign supercritical carbon dioxide (sCO2) Brayton cycle operation on the thermodynamic performance of a heat exchanger/chemical reactor for transferring stored energy from hot, reduced, metal oxide particles into the power cycle. The device, termed an Energy Recovery Reactor (ERR), feeds gravity-driven particles through a bank of zigzag, finned, serpentine tubes containing sCO2 flowing in counterflow to the particles. Preheated air introduced at the bottom of the reactor flows through the zig-zag channels also in counterflow with the particles and parallel flow with the sCO2. The air supplies oxygen (O2) as the reactant to drive exothermic re-oxidation of particles. The air also functions as a heat transfer medium between the energized particles and sCO2. In this study we develop a steady-state 1-D thermodynamic model of the ERR system. By defining controllable inputs such as inlet temperatures and flow rates of particles, air, and sCO2, the remaining state points are calculated based on mass and energy balances. With set flow rates of particles, adjusting the sCO2 cycle operating conditions (e.g., inlet temperature, flow rate, etc.) demonstrate how the performance of the ERR will change during off-design operation. Increasing the inlet temperature of the sCO2 while maintaining the required outlet temperature results in a smaller temperature lift and decreases the heat duty of the system as a whole. When the system runs with a constant particle flow rate, the total amount of chemical heat available is constrained based on the redox reaction. Therefore, adjusting the heat transfer to the sCO2 based on changes to the operating conditions results in changes to the recovery effectiveness and the ratio of sensible to chemical heat released by the particles. This model outputs the steady state operating conditions of the three domains within the reactor at various off-design conditions that are input to an existing segmented heat transfer model to calculate the temperature profiles and local heat transfer performance, which will be verified experimentally in future work.
description: Conference Proceedings of the European sCO2 Conference5th European sCO2 Conference for Energy Systems: March 14-16, 2023, Prague, Czech Republic, p. 226
title: «Go for it!»: Ein Projekt für mehr Chancengleichheit am Gymnasium in Zürich
Creators: name: Landolt, Sara
name: Kägi, Meret
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: educational transition
subject: social inequality
subject: supplementary education market
subject: mentoring
subject: Switzerland
subject: Bildungsübergang
subject: soziale Ungleichheit
subject: Bildungsmarkt
subject: Mentoring
subject: Schweiz
subject: 370

description: In Switzerland, social inequality is still being reproduced at the transition to Gymnasium. The private initiative „Go for it!“ offers talented children from socially disadvantaged families support for this highly selective transition, including a mentoring program for the first half year at Gymnasium. In the paper, we discuss in particular this mentoring from the perspective of young people participating in it. In doing so, we position the initiative in the growing supplementary education market
description: In der Schweiz wird beim Übertritt ans Gymnasium nach wie vor soziale Ungleichheit reproduziert. Die in diesem Beitrag vorgestellte private Initiative «Go for it!» bietet talentierten Kindern aus sozial benachteiligten Familien Unterstützung bei diesem stark selektiven Übertritt; auch anhand eines Mentoring-Programms für das 1. Halbjahr am Gymnasium. Insbesondere dieses Angebot wird aus Sicht der beteiligten Jugendlichen diskutiert. Die Initiative wird dabei in den Kontext eines wachsenden Marktes schulbezogener Unterstützungsangebote gestellt.
description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2020, no. 0202|2020 - Ausgabe 4, p. 30
Modeling of Self-similar Traffic
Creators: name: Strelkovskaya, Irina
name: Solovskaya, Irina
name: Severin, Nikolay
Publisher: name: Hochschule Anhalt
Year: 2016
Subjects: subject: 004 Datenverarbeitung, Informatik
subject: 537 Elektrizität, Elektronik

description: Proceedings of the International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2016). Jg. 4 . Köthen, 2016
description: Modeling of self-similar traffic is performed for the queuing system of G/M/1/K type using Weibull distribution. To study the self-similar traffic the simulation model is developed by using SIMULINK software package in MATLAB environment. Approximation of self-similar traffic on the basis of spline functions. Modeling self-similar traffic is carried outfor QS of W/M/1/K type using the Weibull distribution. Initial data are: the value of Hurst parameter H=0,65, the shape parameter of the distribution curve α≈0,7 and distribution parameter β≈0,0099. Considering that the self-similar traffic is characterized by the presence of "splashes" and long-termdependence between the moments of requests arrival in this study under given initial data it is reasonable to use linear interpolation splines.
title: Racist Roses? – Ein kritischer Kommentar aus postkolonialer Perspektive zur Rosen-zucht in Kenia
Creators: name: Eberth, Andreas
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: 370

description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2020, no. 0202|2020 - Ausgabe 4, p. 42
title: Rezension: Diercke Geographie und Sport. Raumrelevante Freizeitaktivitäten kompetenzorien-tiert unterrichten.
Creators: name: Eberth, Andreas
name: Heilen, Lydia
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: 370

description: OpenSpaces: Zeitschrift für Didaktiken der Geographie, vol. 2020, no. 0202|2020 - Ausgabe 4, p. 52
A Study On Stock Market Research & Analysis at JP Morgan
Creators: name: Mr.Shubham Sharma, Mr.Yashwant Kumar
Publisher: name: Zenodo
Year: 2025

description: The stock market plays a pivotal role in the global financial system by enabling capital formation, investment, and wealth creation. Institutions like J.P. Morgan have been instrumental in shaping market movements through their in-depth research, robust analytics, and market strategies. Stock market research and analysis at J.P. Morgan combines traditional investment strategies with advanced quantitative models and deep economic insights to provide an integrated view of markets for investors. J.P. Morgan's Equity Research Division employs a multidisciplinary approach—blending economic forecasting, sectoral studies, financial statement analysis, and real-time trading data. The firm’s global research coverage spans equities, credit, currencies, commodities, and macroeconomics, providing investors with both granular and holistic market perspectives