cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Proposal_of_a_Deuterium-Deuterium_fusion_reactor_intended_for_a_large_power_plant.pdf
Creators: name: LINDECKER, Patrick
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401906
subject: Nuclear engineering (incl. fuel enrichment and waste processing and storage)
classificationCode: 510601
subject: Nuclear physics

description: This article looks for the necessary conditions to use Deuterium-Deuterium (D-D) fusion for a large power plant. At the moment, for nearly all the projects (JET, ITER…) only the Deuterium-Tritium (D-T) fuel is considered for a power plant. However, as shown in this article, even if a D-D reactor would be necessarily much bigger than a D-T reactor due to the much weaker fusion reactivity of the D-D fusion compared to the D-T fusion, a D-D reactor size would remain under an acceptable size. Indeed, a D-D power plant would be necessarily large and powerful, i.e. the net electric power would be equal to a minimum of 1.2 GWe and preferably above 10 GWe. A D-D reactor would be less complex than a D-T reactor as it is not necessary to obtain Tritium from the reactor itself. It is proposed the same type of reactor yet proposed by the author in a previous article, i.e. a Stellarator “racetrack” magnetic loop. The working of this reactor is continuous.
It is reminded that the Deuterium is relatively abundant on the sea water, and so it constitutes an almost inexhaustible source of energy.Thanks to secondary fusions (D-T and D-He3) which both occur at an appreciable level above 100 keV, plasma can stabilize around such high equilibrium energy (i.e. between 100 and 150 keV). The mechanical gain (Q) of such reactor increases with the internal pipe radius, up to 4.5 m. A radius of 4.5 m permits a mechanical gain (Q) of about 17 which thanks to a modern thermo-dynamical conversion would lead to convert about 21 % of the thermal power issued from the D-D reactor in a net electric power of 20 GWe. The goal of the article is to create a physical model of the D-D reactor so as to estimate this one without the need of a simulator and finally to estimate the dimensions, power and yield of such D-D reactor for different net electrical powers. The difficulties of the modeling of such reactor are listed in this article and would certainly be applicable to a future D-He3 reactor, if any.
Implementation of metabolic screening tool to improve metabolic monitoring and reduce metabolic syndrome in psychiatric patients taking second-generation antipsychotic medications
Creators: name: Sajan, Sheela
Publisher: name: No Publisher Supplied
Year: 2021

description: Purpose of Project: Around 50% of individuals with serious mental illnesses who take second-generation antipsychotic medications are undiagnosed with metabolic syndrome and its comorbidities of hyperlipidemia, diabetes, and hypertension. This pilot study explored the gaps in current practices and the effects of metabolic screening through an evidence-based screening tool. The purpose of this study is to (1) improve clinician knowledge about metabolic syndrome, (2) screen and monitor patients with an evidence-based metabolic screening tool, and (3) refer patients that are at risk to primary care for metabolic syndrome treatment. Methodology: This study used a retrospective chart audit and a pre-and post-survey design to assess the effect of clinician educational intervention at baseline and two months regarding metabolic syndrome, metabolic screening, and monitoring psychiatric patients on second-generation antipsychotic medications. An evidence-based screening tool based on the American Psychiatric Association and American Diabetic Association guidelines was utilized, and demographic data and metabolic parameters were collected. The IOWA model is the theoretical framework used to support this study, and the Wilcoxon signed-rank test was used for data analysis. Results: A statistically significant improvement in clinicians’ knowledge after two months of incorporating the evidence-based metabolic screening tool into their clinical practice.Implication: There was an improvement in metabolic monitoring and consequential reduction of metabolic syndrome in psychiatric patients. This study demonstrates that increased proper screening by clinicians can positively impact patients' quality of life and lower annual health care expenditures.
Elicitation - animals and food
Creators: name: Piño Ríos, Zoila
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: amc

description: This bundle contains recordings and associated notes from an elicitation session conducted by Emily Clem with Zoila Piño Ríos. Topics covered include vocabulary and utterances related to animals and food.
The number of negative modes of the oscillating bounces
Creators: name: Lavrelashvili, George
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The spectrum of small perturbations about oscillating bounce solutions recently discussed in the literature is investigated. Our study supports quite intuitive and expected result: the bounce with N nodes has exactly N homogeneous negative modes. Existence of more than one negative modes makes obscure the relation of these oscillating bounce solutions to the false vacuum decay processes.
description: LaTex, 6 pages, including 3 figures
Dynamic exergy analysis of a recuperative dual-pressure ORC driven by waste heat
Creators: name: Jiang, Nan
name: Du, Yang
name: Chen, Kang
name: Fan, Gang
name: Jiangfeng Wang
name: Zhao, Pan
name: Yiping Dai
Publisher: name: Technical University of Munich
Year: 2021
Subjects: dual-pressure ORC; exergy efficiency; dynamic analysis; finite volume method

description: To absorb the waste heat from low-temperature heat source more effectively, an ORC system is proposed. Compared with the traditional ORC system, an evaporator and a recuperator is added to the cycle. It is driven by the waste heat of solid bulk, R1234ze(E) is chosen as the working fluid. To study the dynamic characteristics of the system, disturbance is applied to the hot air inlet temperature. The results indicate that under 10℃ step decrease of hot air inlet temperature, the exergy efficiency of three heat exchangers all rises to the peak first, and then gradually declines. Compared with the initial state, the exergy efficiency of the high-pressure evaporator (HPE) increases the most in the end, which is 1.07%. Both high-pressure evaporator and low-pressure evaporator (LPE) take 700 seconds to return to steady state, while the recuperator only takes about 200 seconds. The exergy efficiencies of turbine, HPE and LPE drop directly when the disturbance occurs. The turbine exergy efficiency has a decline of 0.52%, from 81.1% to 80.58%. The system exergy efficiency firstly jumps from 35.67% to 43.28% and then slowly decreases to 34.65%.
Dynamic control strategies for a solar-ORC system using first-law dynamic and data-driven machine learning models
Creators: name: Liu, Zheng
name: Romagnol, Alessandro
name: Sapin, Paul
name: Markides, Christos
name: Mersch, Matthias
Publisher: name: Technical University of Munich
Year: 2021

description: In this study, we developed and assessed the potential of dynamic control strategies for a domestic scale 1-kW solar thermal power system based on a non-recuperated organic Rankine cycle (ORC) engine coupled to a solar energy system. Such solar-driven systems suffer from part-load performance deterioration due to diurnal and inter-seasonal fluctuations in solar irradiance and ambient temperature. Real-time control strategies for adjusting the operating parameters of these systems have shown great potential to optimise their transient response to time-varying conditions, thus allowing significant gains in the power output delivered by the system. Dynamic model predictive control strategies rely on the development of computationally efficient, fast-solving models. In contrast, traditional physics-based dynamic process models are often too complex to be used for real-time controls. Machine learning techniques (MLTs), especially deep learning artificial neural networks (ANN), have been applied successfully for controlling and optimising nonlinear dynamic systems. In this study, the solar system was controlled using a fuzzy logic controller with optimised decision parameters for maximum solar energy absorption. For the sake of obtaining the optimal ORC thermal efficiency at any instantaneous time, particularly during part-load operation, the first-law ORC model was first replaced by a fastsolving feedforward network model, which was then integrated with a multi-objective genetic algorithm, such that the optimal ORC operating parameters can be obtained. Despite the fact that the feedforward network model was trained using steady-state ORC performance data, it showed comparable results compared with the first-principle model in the dynamic context, with a mean absolute error of 3.3 percent for power prediction and 0.186 percentage points for efficiency prediction.
Jet-like correlations between Forward- and Mid- rapidity in p+p, d+Au and Au+Au collisions from STAR at 200 GeV
Creators: name: Molnar, Levente
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In this proceedings we present STAR measurements of two particle azimuthal correlations between trigger particles at mid-rapidity ($|η|
description: Quark Matter 06 Conference proceedings, submitted to Journal of Phys. G
Final-state Polarization in Bs Decays
Creators: name: Datta, Alakabha
name: London, David
name: Matias, Joaquim
name: Nagashima, Makiko
name: Szynkman, Alejandro
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Certain Bs --> V_1V_2 decays (V_i is a vector meson) can be related by flavor SU(3) symmetry to corresponding Bd --> V_3V_4 decays. In this paper, we show that the final-state polarization can be predicted in the Bs decay, assuming polarization measurements of the Bd decay. This can be done within the scenario of penguin annihilation (PA), which has been suggested as an explanation of the unexpectedly large transverse polarization in B-->phi K^*. PA is used to estimate the breaking of flavor SU(3) symmetry in pairs of decays. Two of these for which PA makes a reasonably precise prediction of the size of SU(3) breaking are (Bs --> phiphi, Bd --> phi K^{0*}) and (Bs --> phi {\bar K}^{0*}, Bd --> {\bar K}^{0*} K^{0*}). The polarization measurement in the Bd decay can be used to predict the transverse polarization in the Bs decay, and will allow a testing of PA.
description: 6 pages
Cordilura picipes
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Cordilura
Cordilura picipes

description: Cordilura picipes (MEIGEN, 1826)
M a t e r i a l e x a m i n e d: Czech Republic: Lázně Kynžvart (6041), 5.vi.2003, 1♂, Šifner leg. (FSPC); Ratibořice (6554), 29.vii.2008, 2♀♀, Máca leg. (MMSC); Makov (6464), 19.vii.1991, 1♂, Šifner leg. (FSPC); Český Rudolec (6957), 25.iv.2007, 1♂, Máca leg. (MMSC). Poland: bei Nimptsch [= Niemcze environs], 22.vii.1912, 1♂, leg.? (NHMB).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1647, DOI: 10.5281/zenodo.5277519
Development of Autologous Serum Eyes Drops Preparing Processes for Patients with Ocular Surface Disease
Creators: name: Nichcha Pairatana
Publisher: name: Research Division
Year: 2023
Subjects: Autologous serum eye drop
ASED Incubation process
Centrifugation process pH
Osmolality

description: Thai Science and Technology Journal, 31, 6, 74-89
Micro-Moments Analysis Timeseries Algorithm - Hong Kong Patent Publication : HK1258539 - 記錄請求發表時的發明名稱 : 微瞬間分析 - 發明人: 史密斯‧法德里
Creators: name: Fadli, Samih
Publisher: name: figshare
Year: 2021
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences
subject: 80199 Artificial Intelligence and Image Processing not elsewhere classified
subject: 170203 Knowledge Representation and Machine Learning
subject: FOS: Psychology
subject: 80109 Pattern Recognition and Data Mining

description: - Hong Kong Intellectual Property Department (HKIPD)- Publication # 1258539 on 11/15/2019 - Application # 19100894.6 on 1/18/2019 - 記錄請求發表時的發明名稱 : 微瞬間分析- 發明人: 史密斯‧法德里
The Micro-Moment Analysis Algorithms are artificial neural networks analysis models that determine accurately in real-time across the omni-channel customer journey the exact moments, channel and content to engage people with cognitive experiences curated programmatically with a prescriptive engagement. The MMV indicates accurately the optimal time for a customer to receive a targeted ads. The MMV is empowering the CORE of the Publicis COSMOS Identity Marketing Data Platform currently managing over 3.6 petabytes of PII/NON PII data on behalf of our customers across North America and EMEA.

This patent was awarded to Samih Fadli. U.S. patent number 10,528,959 [Application Number 16/457,285] was granted by the patent office on 2020-01-07 for micro-moment analysis nd a continuation of U.S. application Ser. No. 16/424,179, filed May 28, 2019 entitled “Micro-Moment Analysis”, which is a continuation-in-part of U.S. application Ser. No. 15/269,786, filed Sep. 19, 2016 entitled “Micro-Moment Analysis” and U.S. application Ser. No. 15/269,642, filed Sep. 19, 2016 entitled “Universal Identification” which applications claim priority from U.S. Provisional Application No. 62/220,727, filed Sep. 18, 2015, and to U.S. Provisional Application No. 62/288,763, filed Jan. 29, 2016. The disclosures of the applications referenced above are incorporated by reference herein in their entirety.
Thermodynamic analysis on trilateral flash cycle (TFC) for low grade heat to power generation using different working fluids
Creators: name: Antonopoulou, Christina
name: Atsonios, Konstantinos
name: Grammelis, Panagiotis
name: Manolakos, Dimitrios
name: Skiadopoulos, Anastasios
name: Bakalis, Pantelis
Publisher: name: Technical University of Munich
Year: 2021

description: Climate change and the global energy crisis strongly emphasize the need not only for low carbon energy production but also for the development of advanced technologies related to heat to power conversion applications. Recent technological advancements indicate that low-grade heat source (100 oC), could potentially become a more sustainable power source. Trilateral Flash Cycle (TFC) is a thermodynamic cycle, the main difference of which compared to the widely used ORC is that the working fluid does not evaporate at the heating phase, but expands from a saturated liquid state. In particular, the working fluid is pressurized, heated at constant pressure, expanded as a two-phase mixture and eventually condensed at constant pressure. Beyond that, TFC employs the same components as an ORC application. This study aims to elaborate TFC thermodynamic analysis, highlight its efficiency and compare the overall cycle performance by using different working fluids. Working fluid selection is primarily focus on the comparison between promising fourth generation refrigerants such as HFO-1234yf and HFO-1234ze(E), with low GWP and zero ODP and more common ones such as HFCs. For each of the refrigerants, parametric investigations are performed, in order to determine the optimal operation aspects in terms of net power output, gross and net thermal efficiency, exergy and total recovery efficiency. The analysis is carried out with Aspen Plus while REFPROP calculation method was selected. The analysis highlighted the importance that the temperature difference across the heater and the expander isentropic efficiency have for the overall cycle performance. Thermodynamic results revealed that HFO-1234yf had the best power production and thermal efficiency performance, while HFC-245fa had a strong exergy potential for a heat source temperature of 90 oC.
Delina nigrita sensu SIFNER 2003
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Delina
Delina nigrita

description: Delina nigrita (FALLÉN, 1819)
M a t e r i a l e x a m i n e d: Poland: Nimptsch [= Niemcze], 18.viii.1908, 1♂, 25.v.1909, 1♂, Duda leg.; Silsterwitz [= Sulistrowice] (NHMW), 12.v.1911, 1♂, Duda leg. (ZMB).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1645, DOI: 10.5281/zenodo.5277519
Preliminary study on a novel transcritical CO2 high-temperature heat pump
Creators: name: Wang, Ji
name: Belusko, Martin
name: Liu, Ming
name: Evans, Michael
name: Alemu Alemu
name: Bruno, Frank
Publisher: name: Technical University of Munich
Year: 2021

description: Carbon dioxide (CO2), also known as R744, is one of the natural substances, which is an environmentally benign, safe and economical refrigerant used for cooling and heating systems. The transcritical CO2 heat pump water heater has attracted much attention from researchers in recent years, due to that the CO2 water heater can contribute to a significant reduction in energy consumption. The CO2 heat pump system can provide hot water with higher efficiency compared to a traditional electric or gas water heater and can achieve a higher delivery temperature compared to other water heat pumps. Based on existing studies, limited research has considered using the transcritical component of CO2 to deliver a high enough temperature suitable for high-temperature water/steam production. Although an upper-temperature limit exists in current CO2 systems, combining this with an electrically driven auxiliary heater can deliver a low-cost steam/water production solution, which can be one of the promising technologies for industrial process heating demand. The present study aims to address the limitations of existing CO2 technology by operating an auxiliary heater and employing an internal heat exchanger for further increasing discharge temperature and heat capacity. Four thermodynamic cycles have been identified and investigated with the consideration of industrial applicability. The numerical analysis for a transcritical CO2 heat pump with the auxiliary heater has been carried out. Several preliminary results with different discharge pressures are described. The results show that the total efficiency of the system will slightly increase with the discharge pressure if the targeted discharge temperature is fixed, and the results of energy distribution show that the ratio of auxiliary heating power to CO2 heating power decreases with the discharge pressure. Additionally, the mathematical model for Bitzer semi-reciprocating compressors is validated against the experimental data with acceptable agreements.
On the Stability of a class of Modified Gravitational Models
Creators: name: Cognola, Guido
name: Gastaldi, Monica
name: Zerbini, Sergio
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Motivated by the dark energy issue, a minisuperspace approach to the stability for modified gravitational models in a four dimensional cosmological setting are investigated. Specifically, after revisiting the $f(R)$ case, $R$ being the Ricci curvature, we present a stability condition around a de Sitter solution valid for modified gravitational models of generalized Gauss-Bonnet type $F(R,G,Q)$, $G$ and $Q$ being the Gauss-Bonnet and quadratic Riemann invariants respectively. A generalization to higher order invariants is mentioned.
description: latex, 13 pag., no figures. Major revision, an additional Section added with new ewsults. New references added
How does altering synchronization of pitching parallel foils change their wake dynamics?
Creators: name: Gungor, Ahmet
name: Khalid, Muhammad Saif Ullah
name: Hemmati, Arman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This study was inspired from the swimming habits of red nose tetra fish that prefer side-by-side configurations and exhibit changes to their synchronization mid-swimming. Using numerical simulations, alterations to the unsteady wake dynamics imposed by abrupt changes in the phase angle between two pitching side-by-side foils were examined at Reynolds number of 4;000 and Strouhal number of 0:50. Four hybrid modes were considered in thisstudy with two modes representing an abrupt phase change by pi during the 20th cycle. The other two modes represented a simplified case of burst-and-coast swimming, in which there was a brief (2 oscillation periods) suspension of oscillations before imposing a change in phase angle. In all cases, the foils initially performed out-of-phase pitching, and then they started their in-phase motion by either performing the upstroke or down-stroke first. This kinematic change resulted in the formation and growth of a secondary vortex street in between two primary streets, which enabled and maintained a split wake configuration. Furthermore, the phase switching altered the pressure levels on the top and bottom surfaces of both foils to almost similar levels, which attributed to a reduction in the side-force. The growth rate of the secondary vortex street remained consistent for all four hybrid modes.
Leptopa filiformis ZETTERSTEDT 1838
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Leptopa
Leptopa filiformis

description: Leptopa filiformis ZETTERSTEDT, 1838
M a t e r i a l e x a m i n e d: Finland: Oulanka, Biol. Station, 22.vii.1967, 1♀, Mihályi leg. (HNHM). Czech Republic: Chyňava (5950), 12.v. 2015, 1♀, Šifner leg.; Horní Kramolín (6042) 10.vi.2003, 1♂, Šifner leg. (all FSPC).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1645, DOI: 10.5281/zenodo.5277519
Sclerocoelus subbrevipennis
Creators: name: Kuwahara, Gregory K.
name: Marshall, Stephen A.
name: Paiero, Steven M.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sphaeroceridae
Sclerocoelus
Sclerocoelus subbrevipennis

description: Sclerocoelus subbrevipennis (Frey, 1954)
Limosina subbrevipennis Frey, 1954: 35.
Leptocera (Limosina) subbrevipennis – Richards 1980: 620.
Sclerocoelus subbrevipennis – Marshall 1997: 104.
Diagnosis
Body length 2.2 mm. Membrane around prosternum bare. Male S5 rectangular, posteromedially pale, bilobed, and covered in short, flattened setulae (cf. Marshall 1997: figs 54, 56); perianal pads well developed and dark; surstylus subtriangular with a rectangular anteroventral lobe bearing a posteroventral patch of thickened setae (cf. Marshall 1997: figs 52–53); postgonite very narrow and strongly sinuate (cf. Marshall 1997: fig. 55). Female S8 hourglass-shaped, lateral margins curved outwards into two prominent ridges (cf. Marshall 1997: fig. 59).
Material examined
TRISTAN DA CUNHA – Inaccessible Island • 1 ♂; SW of Denstone Hill; 37°02′ S, 12°12′ W; 14 Oct. 1989; H.M. Barber leg.; albatross nest; DEBU.
Distribution
South Atlantic: Tristan de Cunha (Inaccessible Island, Nightingale Island)
Remarks
Sclerocoelus subbrevipennis (Frey) is the only unequivocal Sclerocoelus species with a distribution outside the New World, and one of only four species found outside the Neotropical region. The close relationship between S. subbrevipennis and Neotropical members of the S. galapagensis group was documented by Marshall (1997) and we are confident that the species is correctly placed. Although undoubtedly a Sclerocoelus, it is clearly distinct from all other species we have examined so there is no evidence that it is secondarily introduced to Tristan da Cunha. Some of the type specimens were collected in bird nests and in rotting vegetation.
description: Published as part of Kuwahara, Gregory K., Marshall, Stephen A. & Paiero, Steven M., 2025, A revision of the genus Sclerocoelus Marshall (Diptera: Sphaeroceridae), pp. 1-277 in European Journal of Taxonomy 979 on pages 109-110, DOI: 10.5852/ejt.2025.979.2803, http://zenodo.org/record/14980852
Analysis of siloxane mixtures used in organic Rankine cycle with thermal stability limits
Creators: name: Wenhuan Wang
name: Xiaoye Dai
name: Shi, Lin
Publisher: name: Technical University of Munich
Year: 2021
Subjects: organic Rankine cycle; siloxane mixture; thermal stability; influence

description: The siloxanes and their mixtures are suitable working fluids for organic Rankine cycle (ORC) systems with high-temperature heat sources. The thermal stability of siloxanes has a significant effect on the working fluid selection and cycle performance of ORCs. In this study, a thermal decomposition experimental system is designed to measure the thermal stability of octamethyltrisiloxane (MDM), and the effects of the hexamethyldisiloxane (MM) mass fraction and evaporation temperature on the net power and thermal efficiency are calculated. The results showed that the decomposition of MDM could be detected at 240℃ and had higher decomposition ratios comparing with MM. With the temperature limit, the net power and thermal efficiency are both lower than those without the evaporation temperature limit. Siloxane mixtures are the better choice for ORC systems using siloxanes as working fluids in conditions of this paper. MM/MDM (0.6/0.4) improves the net power and heat efficiency of the system by 8.1% and 1.7% respectively, comparing with that of the pure working fluids.
Mirekiana anthrax
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Mirekiana
Mirekiana anthrax

description: Mirekiana anthrax (SCHINER, 1864)
M a t e r i a l e x a m i n e d: Montenegro: Čakor pass, 10.vi.1967, 4♂♂, Lauterer leg. (MMBC). Switzerland: Grisons, 8.vii.1955, 1♂, J. de Beaumont leg. (ML); St. Moritz, 4.vi., No. 10620, 1♂, leg.?; 2.vi., No. 9404, 1♂, leg.?; 23.vii., No. 1102, 1♂ 1♀, 28.viii.1906, 1♂, leg. Oldenberg (NHMW). New species for fauna of Montenegro.
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1646, DOI: 10.5281/zenodo.5277519
Dipolar coupling of nanoparticle-molecule assemblies: An efficient approach for studying strong coupling
Creators: name: Fojt, Jakub
name: Rossi, Tuomas P.
name: Antosiewicz, Tomasz J.
name: Kuisma, Mikael
name: Erhart, Paul
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Strong light-matter interactions facilitate not only emerging applications in quantum and non-linear optics but also modifications of materials properties. In particular the latter possibility has spurred the development of advanced theoretical techniques that can accurately capture both quantum optical and quantum chemical degrees of freedom. These methods are, however, computationally very demanding, which limits their application range. Here, we demonstrate that the optical spectra of nanoparticle-molecule assemblies, including strong coupling effects, can be predicted with good accuracy using a subsystem approach, in which the response functions of the different units are coupled only at the dipolar level. We demonstrate this approach by comparison with previous time-dependent density functional theory calculations for fully coupled systems of Al nanoparticles and benzene molecules. While the present study only considers few-particle systems, the approach can be readily extended to much larger systems and to include explicit optical-cavity modes.
description: 9 pages, 4 figures
Theory of electron spectroscopies in strongly correlated semiconductor quantum dots
Creators: name: Rontani, Massimo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum dots may display fascinating features of strong correlation such as finite-size Wigner crystallization. We here review a few electron spectroscopies and predict that both inelastic light scattering and tunneling imaging experiments are able to capture clear signatures of crystallization.
description: LaTeX2e + World Scientific style (file ws-ijmpb.cls needed for compilation), 10 pages, 3 postscript figures. To appear in Series on Advances in Quantum Many-Body Theories (World Scientific) as invited paper to the 13th International Conference on Recent Progress in Many-Body Theories (QMBT13), Buenos Aires, Argentina, 5-9 December 2005
Information-theoretic model selection applied to supernovae data
Creators: name: Biesiada, Marek
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There are several different theoretical ideas invoked to explain the dark energy with relatively little guidance of which one of them might be right. Therefore the emphasis of ongoing and forthcoming research in this field shifts from estimating specific parameters of cosmological model to the model selection. In this paper we apply information-theoretic model selection approach based on Akaike criterion as an estimator of Kullback-Leibler entropy. In particular, we present the proper way of ranking the competing models based on Akaike weights (in Bayesian language - posterior probabilities of the models). Out of many particular models of dark energy we focus on four: quintessence, quintessence with time varying equation of state, brane-world and generalized Chaplygin gas model and test them on Riess' Gold sample. As a result we obtain that the best model - in terms of Akaike Criterion - is the quintessence model. The odds suggest that although there exist differences in the support given to specific scenarios by supernova data most of the models considered receive similar support. One can also notice that models similar in structure i.e. $Λ$CDM, quintessence and quintessence with variable equation of state are closer to each other in terms of Kullback-Leibler entropy. Models having different structure i.e. Chaplygin gas or brane-world scenario are more distant (in Kullback-Leibler sense) from the best one.
description: 11 pages, JCAP accepted
Configuration optimization of a splitting CO2 transcritical power cycle in engine waste heat recovery: An experimental comparative study
Creators: name: Ligeng Li
name: Tian, Hua
name: Lingfeng Shi
name: Yonghao Zhang
name: Wang, Xuan
name: Gequn Shu
Publisher: name: Technical University of Munich
Year: 2021

description: Great energy conservation potential has been found in engine waste heat recovery, and CO2 transcritical power cycle (CTPC) driven by internal combustion engines has been recognized a promising technological path. Traditional recuperative configuration leads to an increase in thermal efficiency but also has an impact on engine exhaust utilization. Hence, based on the CTPC layout with a recuperator, a splitting design is proposed with an additional heater to reduce the irreversibility from the engine exhaust. Experimental investigation was conducted to reveal the splitting performances compared with the basic recuperative layout. Results showed that the predicted net generated power could be increased by 54.8% from 5.4 kW to 8.4 kW in maximum. The engine exhaust utilization could be improved with a lower exhaust outlet temperature. It should also be noted that the thermal efficiency was also improved by 47.5% compared with the baseline although a higher heat absorption was found in the splitting layout.
Amaurosoma articulatum BECKER 1894
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Amaurosoma
Amaurosoma articulatum

description: Amaurosoma articulatum BECKER, 1894
M a t e r i a l e x a m i n e d: Czech Republic: Suchdol u Kunštátu (6857), 3.v.2007, 1♀, Máca leg. (MMSC). Poland: Bialiwieza, 26.v.1957, 1♀, Kaszab leg. (NNHM).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1646, DOI: 10.5281/zenodo.5277519
Conformal boundary loop models
Creators: name: Jacobsen, Jesper Lykke
name: Saleur, Hubert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study a model of densely packed self-avoiding loops on the annulus, related to the Temperley Lieb algebra with an extra idempotent boundary generator. Four different weights are given to the loops, depending on their homotopy class and whether they touch the outer rim of the annulus. When the weight of a contractible bulk loop x = q + 1/q satisfies -2 < x <= 2, this model is conformally invariant for any real weight of the remaining three parameters. We classify the conformal boundary conditions and give exact expressions for the corresponding boundary scaling dimensions. The amplitudes with which the sectors with any prescribed number and types of non contractible loops appear in the full partition function Z are computed rigorously. Based on this, we write a number of identities involving Z which hold true for any finite size. When the weight of a contractible boundary loop y takes certain discrete values, y_r = [r+1]_q / [r]_q with r integer, other identities involving the standard characters K_{r,s} of the Virasoro algebra are established. The connection with Dirichlet and Neumann boundary conditions in the O(n) model is discussed in detail, and new scaling dimensions are derived. When q is a root of unity and y = y_r, exact connections with the A_m type RSOS model are made. These involve precise relations between the spectra of the loop and RSOS model transfer matrices, valid in finite size. Finally, the results where y=y_r are related to the theory of Temperley Lieb cabling.
description: 28 pages, 19 figures, 2 tables. v2: added new section 3.2, amended figures 17-18, updated references
Disorder enhanced quantum many-body scars in Hilbert crystals
Creators: name: van Voorden, Bart
name: Marcuzzi, Matteo
name: Schoutens, Kareljan
name: Minář, Jiří
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a model arising in facilitated Rydberg chains with positional disorder which features a Hilbert space with the topology of a $d$-dimensional hypercube. This allows for a straightforward interpretation of the many-body dynamics in terms of a single particle one on the Hilbert space and provides an explicit link between the many-body and single particle scars. Exploiting this perspective, we show that an integrability-breaking disorder enhances the scars followed by inhibition of the dynamics due to strong localization of the eigenstates in the large disorder limit. Next, mapping the model to the spin-1/2 XX Heisenberg chain offers a simple geometrical perspective on the recently proposed Onsager scars [PRL ${\bf 124}$, 180604 (2020)], which can be identified with the scars on the edge of the Hilbert space. This makes apparent the origin of their insensitivity to certain types of disorder perturbations.
description: 6+10 pages
A reduced order model to predict the machining time and cost of small-scale radial-inflow turbines
Creators: name: Geiselhart, Matthias
name: Lenau, Torben Anker
name: Schiffmann, Jürg
name: Haglind, Fredrik
Publisher: name: Technical University of Munich
Year: 2021

description: This paper proposes a novel approach to predict the machining time of small-scale radial-inflow turbine impellers for organic Rankine cycle power systems based on preliminary design parameters. The time prediction method uses machining databases of different milling tools for the estimation of the cutting parameters, on which basis the flow channel volume and surfaces are discretized for the generation of preliminary milling toolpaths. The parameter selection comprises the material selection, the volume removed, the demanded surface quality and the tool selection governed by the accessibility due to geometrical limitations induced by the blades. The model is verified using computer-aided manufacturing software for two radial-inflow turbines cases: a state-of-the-art turbine using air and a turbine using the working fluid Novec 649 for a heat recovery application. The results highlight the governing role of the tool slenderness ratio on the actual manufacturing time. The relative time distribution among roughing, semi-finishing and finishing operations remain similar when considering the same production chain. The tool roughing strategy holds potential for optimization by contributing to approximately 60 % of the total milling time. Furthermore, the results indicate that the turbine manufacturing time can be improved by up to approximately 44 % when the maximum permissible load limits of the tools are exploited by customized cutting data. The presented machining time model can be applied in future works to predict the manufacturing costs of impellers and to quantify the influence of individual design features on the total cost by performing a sensitivity analysis. Moreover, the design space for optimal designs of small-scale radial-inflow turbines for organic Rankine power applications considering both the manufacturing time and the performance of the expander can be explored.
Mass-radius relation of intermediate-age disk super star clusters of M82
Creators: name: Cuevas-Otahola, B.
name: Mayya, Y. D.
name: Puerari, I.
name: Rosa-González, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a complete set of structural parameters for a sample of 99 intermediate-age Super Star Cluster (SSCs) in the disk of M82, and carry out a survival analysis using the semi-analytical cluster evolution code EMACSS. The parameters are based on the profile-fitting analysis carried out in a previous work, with the mass-related quantities derived using a mass-to-light ratio for a constant age of 100 Myr. The SSCs follow a power-law mass function with an index $α$=1.5, and a log-normal size function with a typical half-light radius, Rh=4.3 pc, which are both comparable with the values for clusters in the Magellanic Clouds, rather than in giant spirals. The majority of the SSCs follow a power-law mass-radius relation with an index of b=0.29${\pm}$0.05. A dynamical analysis of M82 SSCs using EMACSS suggests that 23% of the clusters are tidally-limited, with the rest undergoing expansion at present. Forward evolution of these clusters suggests that the majority would dissolve in ~2 Gyr. However, a group of four massive compact clusters, and another group of five SSCs at relatively large galactocentric distances, are found to survive for a Hubble time. The model-predicted mass, Rh, ${μ_V}$ and core radius of these surviving SSCs at 12 Gyr are comparable with the corresponding values for the sample of Galactic globular clusters.
description: 18 pages, 22 figures, Accepted to be published in MNRAS
Accelerating iterative equation of state calculations with superancillary phase boundaries
Creators: name: Bell, Ian
Publisher: name: Technical University of Munich
Year: 2021

description: Iterative calculations are needed to obtain the natural variables of an equation of state from the given state variables when analyzing thermal systems (machinery, systems, even simple cycle analysis). When the given state variables are entropy and enthalpy, which arise naturally in turbomachinery, this problem is particularly challenging due to the range of shapes of the phase boundary possible in these coordinates. The iterative calculation of temperature and density from entropy and enthalpy represents a computational bottleneck in many cases. In recent studies it has been shown how superancillary equations (sets of one-dimensional Chebyshev expansions) can be generated that represent the phase boundary of the equation of state to approximately numerical precision. These functions are a few hundred times faster to obtain than the full equation of state. This work shows that if the phase boundary is expressed as superancillary curves, the enthalpy-entropy calculations can be accelerated, particularly near the phase boundary, and made simultaneously more reliable than the existing approaches. The approach is applied to two pure fluids with differing phase boundary shapes.
Amaurosoma brevifrons
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Amaurosoma
Amaurosoma brevifrons

description: Amaurosoma brevifrons (ZETTERSTEDT, 1838)
M a t e r i a l e x a m i n e d: Czech Republic: Chyňava – Kamenná hill (5950), 18.vi.2016, 1♂ 2♀♀, Šifner leg. (FSPC); Senorady (6863), 12.v.2010, 1♀, Máca leg. (MMSC); Boletice – N.Víska (7151), 13.v. 2008, 1♀, Máca leg. (MMSC); Jemčina (6955), 13.v.1991, 1♂, Šifner leg. (FSPC). Poland: Breslau [= Wrócław], A.S. [Alte Sammlung = old colection], without data, 1♂ 6♀♀; Liegnitz [= Legnice], 8.iv.1854, 1♂, det. Becker (NHMW).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1646, DOI: 10.5281/zenodo.5277519
The Milky Way's middle-aged inner ring
Creators: name: Wylie, Shola M.
name: Clarke, Jonathan P.
name: Gerhard, Ortwin E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the metallicity, age, and orbital anatomy of the inner Milky Way, specifically focussing on the outer bar region. We integrated a sample of APOGEE DR16 inner Galaxy stars in a state of the art bar-bulge potential with a slow pattern speed and investigated the link between the resulting orbits and their [Fe/H] and ages. By superimposing the orbits, we built density, [Fe/H], and age maps of the inner Milky Way, which we divided further using the orbital parameters eccentricity, |Xmax|, and |Zmax|. We find that at low heights from the Galactic plane, the Galactic bar gradually transitions into a radially thick, vertically thin, elongated inner ring with average solar [Fe/H]. This inner ring is mainly composed of stars with AstroNN ages between 4 and 9 Gyr with a peak in age between 6 and 8 Gyr, making the average age of the ring ~6 Gyr. The vertical thickness of the ring decreases markedly towards younger ages. We also find very large L4 Lagrange orbits that have average solar to super-solar metallicities and intermediate ages. Lastly, we confirm a clear X-shape in the [Fe/H] and density distributions at large Galactic heights. The orbital structure obtained for the APOGEE stars reveals that the Milky Way hosts an inner ring-like structure between the planar bar and corotation. This structure is on average metal rich, intermediately aged, and enhances the horizontal metallicity gradient along the bar's major axis.
description: 8 pages, 6 figures; Accepted for publication in A&A
Amosoma leucostoma
Creators: name: Šifner, František
name: R, Czech
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Scathophagidae
Amosoma
Amosoma leucostoma

description: Amosoma leucostoma (ZETTERSTEDT, 1846)
M a t e r i a l e x a m i n e d: Czech Republic: Rabštejn, PR Střela (5945), 20.iv.2014, 1♂, Dvořáková leg. (FSPC).
description: Published as part of Šifner, František & R, Czech, 2018, Annotated checklist of the family Scathophagidae (Diptera) in Central Europe, with new faunistics data on some species, pp. 1635-1655 in Linzer biologische Beiträge 50 (2) on page 1646, DOI: 10.5281/zenodo.5277519
Screw expander characteristics for ORC system design
Creators: name: Öhman, Henrik
Publisher: name: Technical University of Munich
Year: 2021
Subjects: Screw expander; Efficiency; Filling factor; Expander; Turbine; ORC

description: Dynamic expanders, axial or radial, used to be the common solution in designing ORC’s though the use of screw expanders is continuously increasing. In the power range of 5 kW to 1 MW a number of screw expander ORC’s are operating in the field. Dynamic expanders and screw expanders show some fundamental differences in characteristics which are important for understanding differences between, and potentials for, the ORC systems in which they are integrated. This paper describes typical characteristics of screw expanders and relate to design optimization opportunities for the ORC. Screw expander design functions, like multi-phase expansion, side-loading, stall speed and postcompression, are described and the corresponding opportunities for cycle-optimization are presented. Screw expander performance characteristics, and the conventional methodology for expressing screw expander performance, is explained as well as some related potentials for advanced ORC control strategies. Typical mechanical limitations of the screw expander and the implications on ORC system design freedom is discussed. Scope is limited to twin screw expanders with synchronized rotors though large parts of the explanations are also relevant for triple screw expanders and screw expanders with direct rotor contact. The major differences related to such technologies are commented. To explain performance characteristics properly novel efficiency data is presented based on testing of a commercially available twin screw expander.