cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A state-of-the-art review on local fatigue design of support structures for offshore wind turbines
Creators: name: Ferraz, Goncalo T.
name: Glisic, Ana
name: Schaumann, Peter
Publisher: name: Leibniz Universität Hannover
Year: 2017
Subjects: subject: Offshore Wind Turbine
subject: Wind energy
subject: Fatigue loads
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::624 | Ingenieurbau und Umwelttechnik

description: The scientific community is devoting more attention to the wide scope of offshore wind turbine structures. Since such structures are subjected to high level of fatigue loads as well as a large number of load cycles caused by wind, waves and turbine operation, the fatigue performance of welded connections is usually a design driving criteria. In this paper, a brief revision on load simulation and strength analysis procedures as well as local fatigue design methods of support structures for offshore wind turbines is presented. In order to face some of the challenges in this area of expertise, a research project is introduced, aiming to exploit residual capacities in the fatigue design of tubular joints of support structures for offshore wind turbines.
ANALYSIS OF M[X1],M[X2]/G1, G2/1 RETRIAL QUEUE WITH PRIORITY SERVICES, DIFFERENTIATE BREAKDOWN,REPAIR, SYNCHRONIZED RENEGING AND OPTIONAL VACATION
Creators: name: G. Ayyappan
name: S. Nithya
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Batch arrivals
Priority queues
Differentiate Breakdown
Optional Vacation
Synchronized Reneging

description: This study deals with the steady-state analysis of single-server retrial non-preemptive priority queue with differentiate breakdown, repair, synchronized reneging and optional vacation. For this purpose, two categories of customers are considered, priority and ordinary customers, who arrive as per Poisson arrival process. The server consistently affords single service for these customers based on general distribution. The server randomly fails while providing service to the customer. Hard failure and soft failure are the two kinds of system failure. Hard failure is defined as an equipment failure that requires a repairman with specialized knowledge to be physically present, which is a time-consuming process. Whereas soft failure is defined as failure caused by events rather than physical condition and is usually resolved rebooting the system. Ordinary customers may renege the orbit if the server is engaged or unavailable. Furthermore, once the service of all priority customers is completed by the server, the server goes for a vacation or becomes idle. In this study, we used probability generating function and supplementary variable technique to solve the Laplace transforms of time-dependent probabilities of system states. Finally, we evaluated performance measures and expressed the results in numerical values.
Potamogeton lucens L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. lucens L. Cat. 332. l: Kanal unter der Pissevache bei Vernayaz (Coquoz).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Ein analytisches Leitungsmodell zur Bestimmung der Signalintegrität in zylindrischen metallischen Gehäusen
Creators: name: Nitsch, Jürgen
name: Rambousky, Ronald
name: Tkachenko, Sergey
Publisher: name: Berlin : VDE-Verlag
Year: 2014
Subjects: subject: analytisches Modell
subject: Impulsform
subject: Flugzeugrumpf
subject: Berechnungsmodell
subject: Leitungsführung
subject: Spannungsquelle
subject: Leitungstheorie
subject: Umschreibung
subject: Randbedingung
subject: elektrisches Feld
subject: Resonator
subject: Koordinate
subject: Wellenleiter
subject: Stromverteilung
subject: Formänderung
subject: Resonanzfrequenz
subject: Fourier-Reihe
subject: Abschlusswiderstand
subject: Signalintegrität
subject: elektromagnetische Wechselwirkung
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In dieser Arbeit wird ein analytisches Modell zur exakten Berechnung der elektromagnetischen Wechselwirkung einer Leitung innerhalb eines geschlossenen Zylinders mit seinem Gehäuse dargestellt. In der technischen Praxis spielen Leitungen eine sehr wichtige Rolle, insbesondere auch dann, wenn sie in geschlossenen Schirmkörpern verlegt sind. In diesen ändern sich die elektromagnetischen (em) Wechselwirkungen im Vergleich zu denjenigen im freien Raum. Dadurch bedingt, ist es auch zu erwarten, dass die eingespeisten Signalformen, die entlang der Leiter propagieren, verändert werden. Diese Beeinflussung wird im Folgenden an einer in einem Zylinder verlegten Leitung untersucht.
Implicit-Explicit Runge-Kutta schemes for the Boltzmann-Poisson system for semiconductors
Creators: name: Dimarco, G.
name: Pareschi, L.
name: Rispoli, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35B25, 65M06, 76R50, 82C70

description: In this paper we develop a class of Implicit-Explicit Runge-Kutta schemes for solving the multi-scale semiconductor Boltzmann equation. The relevant scale which characterizes this kind of problems is the diffusive scaling. This means that, in the limit of zero mean free path, the system is governed by a drift-diffusion equation. Our aim is to develop a method which accurately works for the different regimes encountered in general semiconductor simulations: the kinetic, the intermediate and the diffusive one. Moreover, we want to overcome the restrictive time step conditions of standard time integration techniques when applied to the solution of this kind of phenomena without any deterioration in the accuracy. As a result, we obtain high order time and space discretization schemes which do not suffer from the usual parabolic stiffness in the diffusive limit. We show different numerical results which permit to appreciate the performances of the proposed schemes.
Analysis of projected profit in an M/M/K Encouraged Arrival Queueing model using Chi-Square Test
Creators: name: V. Narmadha
name: P. Rajendran
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Encouraged Arrivals (eaη)
Promotions
Expenses
Chi-square test
Frequency
Degrees of freedom (Dof)
Little’s formula (LF)

description: Nowadays, queues be seen in fast food restaurants and in all service-based businesses. This study is a mathematical analysis of such business firms with the help of Queueing Theory . The discounts and promotions entice customers to the firm and in this study such attracted customers are referred to as Encouraged Arrivals. The Chi-square test is used to determine the kind of encouraged arrival pattern that adheres to the data observed from a fast food outlet. We introduce the encouraged arrivals in an M/M/k queueing model for the analysis of performance metrics. The performance metrics of the various encouraged arrival patterns are compared and the ideal one is chosen for the firm. The economic analysis shows that with encouraged arrivals, the cost associated with the time lost due to waiting is reduced gradually with increasing number of servers. Thus the firm increases its projected profit with encouraged arrivals. This study helps the entrepreneurs to decide the kind of discounts that would attract the customers simultaneously improving the firm’s profit. Little’s law is also verified.
Entwicklung und Verifikation eines Mess- und Bewertungsverfahrens der elektromagnetischen Immission durch ITS-G5
Creators: name: Schilling, Lisa-Marie
name: Bornkessel, Christian
name: Hein, Matthias A.
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: intelligente Transportsysteme
subject: V2X-Kommunikation
subject: Immission
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Immer mehr Bereiche des alltäglichen Lebens werden von drahtlos kommunikationsfähigen elektronischen Geräten beeinflusst, so dass die Relevanz für die persönliche Exposition der Nutzer durch hochfrequente elektromagnetische Felder rapide zunimmt. So soll auch der Straßenverkehr stetig weiter automatisiert und per Funk vernetzt werden, indem so genannte intelligente Transportsysteme (ITS) entwickelt werden. Im Rahmen des vernetzten Fahrens sollen Fahrzeuge im Verkehr untereinander, aber auch mit Infrastruktur und weiteren Verkehrsteilnehmern kommunizieren, um Sensor-, Zustands- und Ortsinformationen austauschen zu können. Hierfür wird der Begriff vehicle-to-everything (V2X)- Kommunikation verwendet. Zukünftig wird somit der Straßenverkehr als ein weiterer und erheblicher Teil der Alltagsumgebung von neuen Funktechnologien durchdrungen, die per Konstruktion einen signifikanten zusätzlichen Beitrag zur persönlichen Exposition liefern. Für die technische Umsetzung der V2X-Kommunikation etabliert sich neben der auf Mobilfunk basierenden Funktechnik cellular-V2X (C-V2X) der Kooperation 3rd Generation Partnership Project derzeit in Europa die Kommunikationstechnologie ITS-G5, die auf dem Standard 802.11p [1] des Verbands Institute of Electrical and Electronics Engineers (IEEE) basiert. Für den europäischen Einsatz wird ITS-G5 durch das europäische Institut für Telekommunikationsnormen (ETSI) spezifiziert und genormt. Ein zuverlässiges und praktikables Verfahren zur Bestimmung der elektromagnetischen Immission durch ITSG5- Geräte existiert allerdings bislang nicht. Um die Exposition der Allgemeinbevölkerung in Verkehrsumgebungen durch die neuen ITS-Funksysteme abschätzen zu können, ist die Entwicklung eines Immissionsmessverfahrens für ITS-G5 dringend erforderlich. Vorliegender Beitrag beschreibt die Entwicklung eines ITS-G5-spezifischen Mess- und Bewertungsverfahrens unter Verwendung des frequenzselektiven Messgeräts SRM-3006 von Narda STS [2]. Abgesehen von der physikalischen Zugangsschicht weist der Standard ITS-G5 Ähnlichkeiten mit dem Sidelink des LTE-Derivats C-V2X auf, so dass die hier beschriebenen Schlussfolgerungen sinngemäß für beide Standards Anwendung finden können.
Direct and indirect constraints on isospin-violating dark matter
Creators: name: Zhou, Yu-Feng
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The scenario of isospin-violating dark matter (IVDM) with destructive interference between DM-proton and DM-neutron scatterings provides a potential possibility to reconcile the experimental results of DAMA, CoGeNT and XENON. We explore the constraints on the IVDM from other direct detection experiments such as CRESST and SIMPLE, etc. and from the indirect DM searches such as the antiproton flux measured by BESS-Polar II. The results show that the relevant couplings in IVDM scenario are severely constrained.
description: 7 pages, 3 figures, invited talk at the "9th International Symposium on Cosmology and Particle Physics (CosPA2012)", 13-17 November 2012, Taipei
A NEW CONTROL CHART FOR PROCESS DISPERSION BASED ON RANKED SET SAMPLING
Creators: name: Chandrakant Gardi
name: Ghute, Vikas
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Control chart
Average run length
Process dispersion
Ranked set sampling
Runs rules
Downton estimator

description: In this paper, we propose a new control chart based on Downton’s estimator (D) for monitoring the process dispersion using ranked set sampling design and runs rules. The performance of the proposed control chart is compared with the originally proposed D chart based on simple random sampling method when underlying process distribution is normal and non-normal. The average run length is used to evaluate the performance of the proposed control chart. It is observed that the proposed control chart is efficient in detecting shifts in process dispersion as compared with the chart using simple random sampling method. The performance of the proposed chart is further investigated using runs rules. The efficiency of the designed runs rules RSS-D chart is compared with its existing counterparts and is found to be superior.
Center foliation: absolute continuity, disintegration and rigidity
Creators: name: Varao, Regis
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this paper we address the issues of absolute continuity for the center foliation (as well as the disintegration on the non-absolute continuous case) and rigidity of volume preserving partially hyperbolic diffeomorphisms isotopic to a linear Anosov on $\mathbb T^3$. It is shown that the disintegration of volume on center leaves may be neither atomic nor Lebesgue. It is also obtained results concerning the atomic disintegration. Moreover, the absolute continuity of the center foliation does not imply smooth conjugacy with its linearization. Imposing stronger conditions besides absolute continuity on the center foliation, smooth conjugacy is obtained.
Optimization and Analysis of Squealer Tip Geometries in Supercritical CO2
Creators: name: Bean, Stephen Thomas
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Energy generation, conversion and storage (excl. chemical and electrical)

description: In this thesis, two optimizations of squealer tip geometries are completed for first stage turbine blades for use in a supercritical carbon dioxide turbine. First, an optimization is performed on a baseline trapezoidal turbine blade and a set of solution geometries is chosen from along the Pareto front. Next, a second optimization is completed on an advanced blade design and the geometries are grouped by performance characteristics and geometric features. The success of similar geometries across these two optimizations is also analyzed and demonstrates consistency of performance increases from tip geometries over the baseline geometry. An analysis of a flat tip geometry in a stationary condition is also performed to begin validation of annular cascades as a method for testing squealer tip geometries.
AN APPROACH FOR ASSESSMENT OF RELIABILITY INDICES CONSIDERING OMISSION OF FIXED REPAIR TIME FOR ELECTRIC TRACTION SYSTEM APPLYING MONTE CARLO SIMULATION
Creators: name: Tiwary, Aditya
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Monte Carlo simulation
Electric traction system
Mean up time
Repair time
Reliability indices

description: Assessment of numerous reliability indices is essential when availability and unavailability of supply in any electric power system is talked about. The reliability index which are very important for overall performance of any complex engineering system are mean up time, mean down time and unavailability. In this paper, assessment of various reliability indices for the electric traction system is done based on Monte Carlo simulation. If an engineering system fails then its repair is required to be performed at proper time interval. Omission of a threshold value of fixed repair time will not have so much impact on the overall reliability of the engineering system taken together. Electric traction system is very important as it is utilized for operation of passenger trains and freight trains across a large rail network throughout the continents. In view of above, modified values of mean up time, mean down time and unavailability have been obtained accounting fixed repair time omission for the electrical traction system taken under consideration.
Spectral characterization of third-order harmonic generation assisted by two-dimensional plasma grating in air
Creators: name: Ding, P. J.
name: Liu, Z. Y.
name: Shi, Y. C.
name: Sun, S. H.
name: Liu, X. L.
name: Wang, X. SH.
name: Guo, Z. Q.
name: Liu, Q. C.
name: Li, Y. H.
name: Hu, B. T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A dramatic spectral modulation of third-order harmonic (TH) emission generated in a near in- frared femtosecond (fs) pulse filamentation, assisted by a two-dimensional plasma grating formed by two pump femtosecond pulses, is experimentally demonstrated when their spatiotemporal overlap is achieved. It is mainly attributed to strong cross-phase modulation induced by the fundamental wave of the probe pulse and two pump ones. The delay dynamic of TH spectra indicates the influence of two retarded nonlinear responses on the TH generation. The dependences of TH generation on the energies of probe and pump pulses, relative field polarization angle are also studied.
description: 6 pages, 5 figures
Investigation on the Coronal Magnetic Field Using a Type II Solar Radio Burst
Creators: name: Vasanth, V.
name: Umapathy, S.
name: Vršnak, B.
name: Žic, T.
name: Prakash, O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Type-II solar radio burst recorded on 13 June 2010 by the radio spectrograph of the Hiraiso Solar Observatory was employed to estimate the magnetic-field strength in the solar corona. The burst was characterized by a well pronounced band-splitting, which we used to estimate the density jump at the shock and Alfven Mach number using the Rankine-Hugoniot relations. The plasma frequency of the Type-II bursts is converted into height [R] in solar radii using the appropriate density model, then we estimated the shock speed [Vs], coronal Alfven velocity [Va], and the magnetic-field strength at different heights. The relative bandwidth of the band-split is found to be in the range 0.2 -- 0.25, corresponding to the density jump of X = 1.44 -- 1.56, and the Alfven Mach number of MA = 1.35 -- 1.45. The inferred mean shock speed was on the order of V ~ 667 km/s. From the dependencies V(R) and MA(R) we found that Alfven speed slightly decreases at R ~ 1.3 -- 1.5. The magnetic-field strength decreases from a value between 2.7 and 1.7 G at R ~ 1.3 -- 1.5 Rs depending on the coronal-density model employed. We find that our results are in good agreement with the empirical scaling by Dulk and McLean (Solar Phys. 57, 279, 1978) and Gopalswamy et al. (Astrophys. J. 744, 72, 2012). Our result shows that Type-II band splitting method is an important tool for inferring the coronal magnetic field, especially when independent measurements were made from white light observations.
description: Accepted for publication in Solar Physics
Few-Cycle Pulse Generation in an X-Ray Free-Electron Laser
Creators: name: Dunning, D. J.
name: McNeil, B. W. J.
name: Thompson, N. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A method is proposed to generate trains of few-cycle x-ray pulses from a Free-Electron Laser (FEL) amplifier via a compact 'afterburner' extension consisting of several few-period undulator sections separated by electron chicane delays. Simulations show that in the hard x-ray (wavelength ~0.1 nm; photon energy ~10 keV) and with peak powers approaching normal FEL saturation (GW) levels, root mean square pulse durations of 700 zeptoseconds may be obtained. This is approximately two orders of magnitude shorter than that possible for normal FEL amplifier operation. The spectrum is discretely multichromatic with a bandwidth envelope increased by approximately two orders of magnitude over un-seeded FEL amplifier operation. Such a source would significantly enhance research opportunity in atomic dynamics, and push capability towards nuclear dynamics.
Einfluss der unerwünschten Polarisationsanteile auf die empfangene Zielgröße einer DVOR-Antenne
Creators: name: Sandmann, Sergei
name: Garbe, Heyno
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Doppler-Drehfunkfeuer
subject: Luftfahrzeug
subject: DVOR
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Die Funktionsweise eines Doppler-Drehfunkfeuers (engl. Doppler Very High Frequency Omnidirectional Radio Range (DVOR)) beruht darauf, dem Luftfahrzeug (LFZ) den azimutalen Winkel ϕ zur Verfügung zu stellen, der sich aus der Perspektive der DVOR zwischen magnetisch Nord und der Standlinie zum LFZ ergibt. Wie in Kap. 2 genauer erläutert, ist die DVOR-Anlage dabei auf eine möglichst ungestörte Feldausbreitung im Raum angewiesen, um eine hohe Genauigkeit der Zielgröße zu erreichen. Neben einer gestörten Feldausbreitung im Raum existieren jedoch weitere Störmechanismen, die bei der Untersuchung der Zielgrößengenauigkeit berücksichtigt werden müssen. So ist der Gegenstand der vorliegenden Arbeit die Untersuchung des Einflusses der unerwünschten Polarisationsanteile auf die empfangene Zielgröße ϕ. Während die DVOR-Anlage ihre Zielgröße in der orbitalen Polarisation abstrahlt [1], empfängt die Antenne des FLZ auch Anteile aus der radialen und vertikalen Polarisation. Das Verhältnis dieser Polarisationsanteile variiert dabei in Abhängigkeit von der Lage des LFZ im Raum. Um die entsprechenden Einflüsse zu untersuchen, wurde auf einer zylindrischen, repräsentativ angeordneten Analysefläche im Raum die Zielgröße ϕ eines im Ursprung befindlichen DVOR für ein LFZ berechnet, während dessen Schräglage in allen drei Achsen variiert wurde. Zusätzlich wurden Windenergieanlagen (WEA) zwischen DVOR und Analysefläche eingefügt, sodass die Störeinflüsse auch in Gegenwart von Streukörpern untersucht werden konnten.
Potamogeton gramineus L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. gramineus L. Cat. 332. l: Dorenaz (Garns); Le Rosel (idem). - 2: Branson-Saillon (Garns); Batassebei Sitten (Christ); Seenvon Lens,bis 1437m (Garns). - 3:Lacde Chanrion im Val de Bagnes, 2386 m (Zwicky); beim Bahnhof Charrat-Fully (Garns); mehrfach unterhalb Saxon (F.); Riddes (Paiche).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates
Creators: name: Deuretzbacher, Frank
name: Gebreyesus, Garu
name: Topic, Oliver
name: Scherer, Manuel
name: Lücke, Bernd
name: Ertmer, Wolfgang
name: Arlt, Jan J.
name: Klempt, Carsten
name: Santos, Luis
Publisher: name: College Park, MD : American Physical Society
Year: 2010
Subjects: subject: Alkali metal atoms
subject: Bose-Einstein condensates
subject: Dipolar interaction
subject: Magnetic dipole-dipole interaction
subject: Magnetic field gradient
subject: Matter waves
subject: Parametric amplification
subject: Amplification
subject: Statistical mechanics
subject: Steam condensers
subject: Alkali metals
subject: Magnetic field effects
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions, although typically very weak in alkalimetal atoms, are shown to play a very relevant role in the amplification process. We show that these interactions may lead to a strong dependence of the amplification dynamics on the angle between the trap axis and the magnetic-field orientation. We analyze as well the important role played by magnetic-field gradients, which also modify strongly the amplification process. Magnetic-field gradients, hence, must be carefully controlled in future experiments, in order to observe clearly the effects of the dipolar interactions in the amplification dynamics. © 2010 The American Physical Society.
New artificial-free phase 1 simplex method
Creators: name: Khan, Nasiruddin
name: Inayatullah, Syed
name: Imtiaz, Muhammad
name: Khan, Fozia Hanif
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This paper presents new and easy to use versions of primal and dual phase 1 processes which obviate the role of artificial variables and constraints by allowing negative variables into the basis. During the process new method visits the same sequence of corner points as the traditional phase 1 does. The new method is artificial free so, it also avoids stalling and saves degenerate pivots in many cases of linear programming problems.
Magnetoresistance in a High Mobility Two-Dimensional Electron System as a Function of Sample Geometry
Creators: name: Bockhorn, L.
name: Hodaei, A.
name: Schuh, Dieter
name: Wegscheider, Werner
name: Haug, Rolf J.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2013
Subjects: subject: Physics, Multidisciplinary
subject: Physics, Condensed Matter
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: In a high mobility two-dimensional electron gas (2DEG) realized in a GaAs/Al0.3Ga0.7As quantum well we observe changes in the Shubnikov-de Haas oscillations (SdHO) and in the Hall resistance for different sample geometries. We observe for each sample geometry a strong negative magnetoresistance around zero magnetic field which consists of a peak around zero magnetic field and of a huge magnetoresistance at larger fields. The peak around zero magnetic field is left unchanged for different geometries.
Quantum metrology for gravitational wave astronomy
Creators: name: Schnabel, Roman
name: Mavalvala, Nergis
name: McClelland, David E.
name: Lam, Ping K.
Publisher: name: London : Nature Publishing Group
Year: 2010
Subjects: subject: 2-photon coherent states
subject: probe wmap observations
subject: squeezed states
subject: light
subject: noise
subject: limit
subject: generation
subject: detectors
subject: interferometer
subject: information
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Einstein's general theory of relativity predicts that accelerating mass distributions produce gravitational radiation, analogous to electromagnetic radiation from accelerating charges. These gravitational waves (GWs) have not been directly detected to date, but are expected to open a new window to the Universe once the detectors, kilometre-scale laser interferometers measuring the distance between quasi-free-falling mirrors, have achieved adequate sensitivity. Recent advances in quantum metrology may now contribute to provide the required sensitivity boost. The so-called squeezed light is able to quantum entangle the high-power laser fields in the interferometer arms, and could have a key role in the realization of GW astronomy.
RNA-Seq reveals novel genes and pathways associated with hypoxia duration and tolerance in tomato root
Creators: name: Safavi-Rizi, Vajiheh
name: Herde, Marco
name: Stöhr, Christine
Publisher: name: [London] : Macmillan Publishers Limited, part of Springer Nature
Year: 2020
Subjects: subject: climate change
subject: hypoxia
subject: ypoxic stress
subject: RnA-Seq
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::600 | Technik

description: Due to climate change, economically important crop plants will encounter flooding periods causing hypoxic stress more frequently. This may lead to reduced yields and endanger food security. As roots are the first organ to be affected by hypoxia, the ability to sense and respond to hypoxic stress is crucial. At the molecular level, therefore, fine-tuning the regulation of gene expression in the root is essential for hypoxia tolerance. Using an RNA-Seq approach, we investigated transcriptome modulation in tomato roots of the cultivar ‘Moneymaker’, in response to short- (6 h) and long-term (48 h) hypoxia. Hypoxia duration appeared to have a significant impact on gene expression such that the roots of five weeks old tomato plants showed a distinct time-dependent transcriptome response. We observed expression changes in 267 and 1421 genes under short- and long-term hypoxia, respectively. Among these, 243 genes experienced changed expression at both time points. We identified tomato genes with a potential role in aerenchyma formation which facilitates oxygen transport and may act as an escape mechanism enabling hypoxia tolerance. Moreover, we identified differentially regulated genes related to carbon and amino acid metabolism and redox homeostasis. Of particular interest were the differentially regulated transcription factors, which act as master regulators of downstream target genes involved in responses to short and/or long-term hypoxia. Our data suggest a temporal metabolic and anatomic adjustment to hypoxia in tomato root which requires further investigation. We propose that the regulated genes identified in this study are good candidates for further studies regarding hypoxia tolerance in tomato or other crops. © 2020, The Author(s).
A NEW TWO PARAMETRIC GENERALIZED DIVERGENCE MEASURE AND ITS RESIDUAL
Creators: name: Fayaz Ahmed
name: Baig, Mirza Abdul Khalique
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: characterization result
Divergence measure
distribution function
proportional hazard rate model
Residual function

description: In this research article, we proposed a new two-parametric divergence measure and developed its weighted version. We also looked at its properties and specific cases with examples and also obtained some results and bounds for new two prametric weighted generalized divergence measure. With the aid of a numerical example that determine the distribution function and also studied some inequality for the new proposed divergence measure. The known divergence measure is the particular case of our proposed measure. The proposed measure uniquely characterized the distribution function using the proportional hazard rate model (PHRM). Its residual function is also being worked on.
Grenzen der klassischen Störaussendungs- und Störfestigkeitsmessungen: Beeinflussung des Störspektrums durch nichtlineare Elemente
Creators: name: Weber, Jan
name: Hirsch, Holger
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Störspektrum
subject: Störaussendungsmessung
subject: Störfestigkeitsmessung
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Ein zu prüfendes System wird als elektromagnetisch verträglich bezeichnet, wenn es zufriedenstellend in seiner vorgesehenen elektromagnetischen Umwelt arbeitet und dort nur in einem zulässigen Maß zum Störgeschehen beiträgt. [1] Der Beitrag zum Störgeschehen wird mit Störaussendungsmessungen nachgewiesen, welche je nach Prüfling und Umgebung, z.B. durch CISPR-Normen, vorgegeben sind. Auf gleiche Weise sind Störfestigkeitsmessungen definiert, welche die Prüfbedingungen, zum Nachweis der ausreichenden Festigkeit gegenüber einwirkenden Störgrößen, vorschreiben. Besteht das zu prüfende System beide Messungen gemäß der zugehörigen Vorschrift, gilt es als elektromagnetisch verträglich bezüglich der Umgebung, für die es vorgesehen ist. Darauf aufbauend kann der Hersteller in der EU eine CE-Kennzeichnung an seinem System anbringen und es innerhalb der Europäischen Union vertreiben. Störaussendungs- und Störfestigkeitsmessungen werden separat durchgeführt. Es wird davon ausgegangen, dass die Ergebnisse überlagert weiterhin ihre Gültigkeit behalten. Außerhalb des Prüflabors liegen allerdings andere Bedingungen vor und zusätzliche Effekte des Prüflings können zum Vorschein kommen. Zum Beispiel gibt die Störfestigkeitsnorm [2] nur einzelne Störträgerfrequenzen vor, welche mit einer 1 kHz Sinuswelle und einer Tiefe von 80 % amplitudenmoduliert sind. Tatsächlich muss damit gerechnet werden, dass heute eine Vielzahl von Störfrequenzen, ggf. mit diversen unterschiedlichen Modulationstypen, zeitgleich auf das System einwirken. Dies kann, wenn nichtlineare Elemente im System verbaut sind, zu Wechselwirkungen der einwirkenden Einzelfrequenzen führen. Dies sind zum Beispiel Harmonische des Grundstörsignals oder Intermodulationsprodukte (IM). Diese Mischprodukte können nicht nur das System selbst, sondern ebenfalls die Umgebung beeinflussen und ggf. Störungen verursachen. Eine allgemeine Betrachtung des Prüflings als Koppel- oder Mischelement ist in den Prüfnormen bis auf wenige Ausnahmen unüblich. Diese Arbeit präsentiert Ergebnisse, welche die beschriebenen Wechselwirkungen aufzeigen. Es wird das verwendete Messverfahren erläutert und die Probleme, welche bei der Messung von nichtlinearen Effekten auftreten können, aufgezeigt. Bei den verwendeten Prüflingen handelt es sich um handelsübliche USB-Schaltnetzteile. Diese beinhalten eingangsseitig eine B2 Gleichrichter-Brücke mit angeschlossenem Kondensator um die anliegende 230 V-Netzwechselspannung gleichzurichten.
Automatic Fingerprint Recognition Using Minutiae Matching Technique for the Large Fingerprint Database
Creators: name: Mohsen, S. M.
name: Farhan, S. M. Zamshed
name: Hashem, M. M. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Extracting minutiae from fingerprint images is one of the most important steps in automatic fingerprint identification system. Because minutiae matching are certainly the most well-known and widely used method for fingerprint matching, minutiae are local discontinuities in the fingerprint pattern. In this paper a fingerprint matching algorithm is proposed using some specific feature of the minutiae points, also the acquired fingerprint image is considered by minimizing its size by generating a corresponding fingerprint template for a large fingerprint database. The results achieved are compared with those obtained through some other methods also shows some improvement in the minutiae detection process in terms of memory and time required.
MPEC 2023-L76 : DAILY ORBIT UPDATE (2023 June 14)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Impact of orientation on the vitamin D weighted exposure of a human in an urban environment
Creators: name: Schrempf, Michael
name: Thuns, Nadine
name: Lange, Kezia
name: Seckmeyer, Gunther
Publisher: name: Basel : MDPI AG
Year: 2017
Subjects: subject: Hemispherical sky images
subject: Human exposure
subject: Radiance
subject: Urban environment
subject: UV radiation
subject: Vitamin D
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: The vitamin D3-weighted UV exposure of a human with vertical posture was calculated for urban locations to investigate the impact of orientation and obstructions on the exposure. Human exposure was calculated by using the 3D geometry of a human and integrating the radiance, i.e., the radiant energy from the direct solar beam and the diffuse sky radiation from different incident and azimuth angles. Obstructions of the sky are derived from hemispherical images, which are recorded by a digital camera with a fisheye lens. Due to the low reflectivity of most surfaces in the UV range, the radiance from obstructed sky regions was neglected. For spring equinox (21 March), the exposure of a human model with winter clothing in an environment where obstructions cover 40% of the sky varies by up to 25%, depending on the orientation of the human model to the sun. The calculation of the accumulated vitamin D3-weighted exposure of a human with winter clothing walking during lunch break shows that human exposure is reduced by the obstruction of buildings and vegetation by 40%.
A NEW ZERO-TRUNCATED DISTRIBUTION AND ITS APPLICATIONS TO COUNT DATA
Creators: name: Elah, Na
name: Ahmad, Peer Bilal
name: Muneeb Ahmad Wani
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: truncation
zero-truncated distribution
simulation maximum likelihood estimation
goodness-of-fit

description: Numerous disciplines, including engineering, public health, sociology, psychology, and epidemiology, are particularly interested in the analysis and modelling of zero truncated count data. As a result, we suggest a novel and straightforward structural model in this study called zero truncated new discrete distribution. We examine its statistical properties including probability mass function, cumulative function, and moments. The parametric estimation of the zero-truncated new discrete distribution is explained by Maximum Likelihood Estimation method and, to investigate its performance, a simulation study is proposed. The importance of the distribution is evaluated using two real-world data sets as well as one simulated data set and the model comparison is made on the basis of AIC and BIC criterions.
Finite-size effects in the spectrum of the OSp(3|2) superspin chain
Creators: name: Frahm, Holger
name: Martins, Márcio J.
Publisher: name: Amsterdam : Elsevier Science BV
Year: 2015
Subjects: subject: staggered 6-vertex model
subject: conformal-invariance
subject: continuum-limit
subject: 2 dimensions
subject: lattice-gas
subject: spin chain
subject: point
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The low energy spectrum of a spin chain with OSp(3|2)supergroup symmetry is studied based on the Bethe ansatz solution of the related vertex model. This model is a lattice realization of intersecting loops in two dimensions with loop fugacity z=1which provides a framework to study the critical properties of the unusual low temperature Goldstone phase of the O(N)sigma model for N=1in the context of an integrable model. Our finite-size analysis provides strong evidence for the existence of continua of scaling dimensions, the lowest of them starting at the ground state. Based on our data we conjecture that the so-called watermelon correlation functions decay logarithmically with exponents related to the quadratic Casimir operator of OSp(3|2). The presence of a continuous spectrum is not affected by a change to the boundary conditions although the density of states in the continua appears to be modified.
Solar water desalination
Creators: name: Soltani, Ali
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401199
subject: Environmental engineering not elsewhere classified
classificationCode: 490299
subject: Mathematical physics not elsewhere classified
classificationCode: 410402
subject: Environmental assessment and monitoring
classificationCode: 410499
subject: Environmental management not elsewhere classified
classificationCode: 349999
subject: Other chemical sciences not elsewhere classified
classificationCode: 400513
subject: Water resources engineering
classificationCode: 451506
subject: Pacific Peoples land and water management
classificationCode: 401299
subject: Fluid mechanics and thermal engineering not elsewhere classified
classificationCode: 401799
subject: Mechanical engineering not elsewhere classified

description: The problem of water scarcity and water resources is going to become the greatest challenge for humanity in the near future. The use of renewable energies such as solar energy can easily address this issue. Designing and constructing solar desalination plants is one of the most efficient methods for obtaining affordable and low-cost fresh water.
Equilibration of quantum gases
Creators: name: Farrelly, Terry
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2016
Subjects: subject: quantum statistical physics
subject: quantum information
subject: quantum mechanics
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Finding equilibration times is a major unsolved problem in physics with few analytical results. Here we look at equilibration times for quantum gases of bosons and fermions in the regime of negligibly weak interactions, a setting which not only includes paradigmatic systems such as gases confined to boxes, but also Luttinger liquids and the free superfluid Hubbard model. To do this, we focus on two classes of measurements: (i) coarse-grained observables, such as the number of particles in a region of space, and (ii) few-mode measurements, such as phase correlators.Weshow that, in this setting, equilibration occurs quite generally despite the fact that the particles are not interacting. Furthermore, for coarse-grained measurements the timescale is generally at most polynomial in the number of particles N, which is much faster than previous general upper bounds, which were exponential in N. For local measurements on lattice systems, the timescale is typically linear in the number of lattice sites. In fact, for one-dimensional lattices, the scaling is generally linear in the length of the lattice, which is optimal. Additionally, we look at a few specific examples, one of which consists ofNfermions initially confined on one side of a partition in a box. The partition is removed and the fermions equilibrate extremely quickly in time O(1 N).
The photospheric solar oxygen project: II. Non-concordance of the oxygen abundance derived from two forbidden lines
Creators: name: Caffau, Elisabetta
name: Ludwig, Hans-G.
name: Malherbe, Jean-M.
name: Bonifacio, Piercarlo
name: Steffen, Matthias
name: Monaco, Lorenzo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the Sun, the two forbidden [OI] lines at 630 and 636 nm were previously found to provide discrepant oxygen abundances. aims: We investigate whether this discrepancy is peculiar to the Sun or whether it is also observed in other stars. method: We make use of high-resolution, high signal-to-noise ratio spectra of four dwarf to turn-off stars, five giant stars, and one sub-giant star observed with THEMIS, HARPS, and UVES to investigate the coherence of the two lines. results: The two lines provide oxygen abundances that are consistent, within observational errors, in all the giant stars examined by us. On the other hand, for the two dwarf stars for which a measurement was possible, for Procyon, and for the sub-giant star Capella, the 636 nm line provides systematically higher oxygen abundances, as already seen for the Sun. conclusions: The only two possible reasons for the discrepancy are a serious error in the oscillator strength of the NiI line blending the 630 nm line or the presence of an unknown blend in the 636 nm line, which makes the feature stronger. The CN lines blending the 636 nm line cannot be responsible for the discrepancy. The CaI autoionisation line, on the red wing of which the 636 nm line is formed, is not well modelled by our synthetic spectra. However, a better reproduction of this line would result in even higher abundances from the 636 nm, thus increasing the discrepancy.
description: A&A accepted
O monitoramento da correspondência eletrônica corporativa no ambiente de trabalho: uma análise constitucional à luz da intimidade e da privacidade do empregado
Creators: name: Rafael Fernandes Paz
Publisher: name: Zenodo
Year: 2023
Subjects: Direito do Trabalho
Direito Constitucional
Monitoramento de e-mail corporativo e-mail corporativo
. Direitos fundamentais
Privacidade do empregado.

description: Este livro cuida do monitoramento do e-mail corporativo, ou profissional, disponibilizado pelo empregador ao empregado, para consecução de suas tarefas em seu local de trabalho, prática esta realizada sob o pálio do poder empregatício, manifestado pela função fiscalizatória conferida legalmente ao empregador. Para o desenvolvimento desta obra, abordaremos os preceitos e valores constitucionais aplicáveis à solução do conflito envolvendo o monitoramento do e-mail corporativo, à luz fenômeno da constitucionalização do Direito, em especial do Direito Trabalhista, dotado de alta carga valorativa. Estudaremos o campo da nova dimensão dos direitos fundamentais, a explicar a eficácia irradiante destes direitos às relações privadas (eficácia horizontal dos direitos fundamentais), teoria esta que virá a corroborar o entendimento adotado ao final desta obra. Abordaremos a relação de emprego e sua tutela infraconstitucional, o poder empregatício e seu desenvolvimento no ambiente de trabalho, além da subordinação jurídica e os deveres de fidelidade, obediência e diligência exigíveis em qualquer relação de emprego, tudo à luz da boa-fé objetiva no contrato de trabalho. Por fim, esta obra traz luz à problemática do monitoramento do e-mail corporativo em face da dinamização social e do surgimento de tecnologias intrusivas no ambiente de trabalho, que a pretexto de protegerem a propriedade, criam a chamada "química de intrusão", repudiada pela OIT, por ser tão nociva aos direitos fundamentais da intimidade e da privacidade do empregado. Verificaremos todos os aspectos legais do monitoramento do e-mail, os limites objetivos a legitimarem a referida prática, mediante uma análise sucinta e objetiva do direito comparado acerca do assunto, propondo uma sistematização das ideias de forma a trazer as devidas contribuições doutrinárias sobre o tema.
Potamogeton acutifolius Link
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. acutifolius Link Für das Wallis zu streichen (vgl. Cat. XLVIII und 333).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556