cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aspects of work
Creators: name: Talkner, Peter
name: Hanggi, Peter
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Various approaches of defining and determining work performed on a quantum system are compared. Any operational definition of work, however, must allow for two facts, first, that work characterizes a process rather than an instantaneous state of a system, and, second, that quantum systems are sensitive to the interactions with a measurement apparatus. We compare different measurement scenarios on the basis of the resulting post-measurement states and the according probabilities for finding a particular work value. In particular, we analyze a recently proposed work-meter for the case of a Gaussian pointer state and compare it with the results obtained by two projective and, alternatively, two Gaussian measurements. In the limit of a strong effective measurement strength the work distribution of projective two energy measurements can be recovered. In the opposite limit the average of work becomes independent of any measurement. Yet the fluctuations about this value diverge. The performance of the work-meter is illustrated by the example of a spin in a suddenly changing magnetic field.
description: 13 pages, 3 figures
Geometric conditions for the positive definiteness of the second variation in one-dimensional problems
Creators: name: Lessinnes, Thomas
name: Goriely, Alain
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Given a functional for a one-dimensional physical system, a classical problem is to minimize it by finding stationary solutions and then checking the positive definiteness of the second variation. Establishing the positive definiteness is, in general, analytically untractable. However, we show here that a global geometric analysis of the phase-plane trajectories associated with the stationary solutions leads to generic conditions for minimality. These results provide a straightforward and direct proof of positive definiteness, or lack thereof, in many important cases. In particular, when applied to mechanical systems, the stability or instability of entire classes of solutions can be obtained effortlessly from their geometry in phase-plane, as illustrated on a problem of a mass hanging from an elastic rod with intrinsic curvature.
description: 37 pages, 9 figures
Adaptive multi-hop networks for industrial applications with dynamically changing traffic
Creators: name: Meyer, Florian
Publisher: name: TUHH Universitätsbibliothek
Year: 2023
Subjects: subject: Industrial internet of things
subject: Wireless sensor networks
subject: IEEE 802.15.4 DSME
subject: Industry 4.0
subject: Machine learning
subject: network simulation
classificationCode: 620
subject: Ingenieurwissenschaften

description: Diese Dissertation untersucht Techniken für adaptive Multi-Hop Netzwerke im IIoT im Hinblick auf zeitlich variierenden Datenverkehr. Sie zeigt, dass eine effiziente Übertragung von Managementverkehr entscheidend für eine hohe Anpassungsfähigkeit in IEEE 802.15.4 DSME ist, entwickelt Techniken zur Erhöhung der Anpassungsfähigkeit und validiert diese durch Simulationen, Hardwareexperimente und analytische Modelle. Dabei reduziert QMA Kollisionen im Managementverkehr und das Senden mehrerer Pakete pro GTS und Gruppenbestätigungen entlasten diesen zusätzlich. Schließlich ermöglicht eine dynamische CAP-Reduzierung die fein abgestufte Abwägung zwischen Management- und Datenverkehr.
description: This dissertation explores techniques for adaptive multi-hop networks in the IIoT concerning time-varying, dynamically changing traffic. It demonstrates that efficient transmission of management traffic is crucial for high adaptability in IEEE 802.15.4 DSME, develops several techniques to increase adaptability and validates them through simulations, hardware experiments, and analytical models. In particular, QMA reduces collisions in management traffic by learning when it is feasible to transmit a packet. Sending multiple packets per GTS and group acknowledgments further relieve the management traffic load. Finally, dynamic CAP-reduction enables a fine-grained trade-off between management and data traffic.
Passivation of Screen-Printed Boron Emitters in n-Type Multicrystalline Silicon Solar Cells Using SiNx:H Double Layers
Creators: name: Suzuki, H.
name: Furuichi, K.
name: Dhamrin, M.
name: Suzuki, S.
name: Suda, M.
name: Kamisako, K.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2469-2472
description: The passivation effects of SiNx:H (SiN) single layer and SiN/SiN and SiN/a-Si:H double layers on the
p/n/p n-type silicon substrate were investigated. The passivation quality of SiN/SiN double layers was superior to
those of SiNx:H single layer and SiN/a-Si double layers. The fixed charge density in SiN/SiN double layers was lower
than those of SiNx:H single layer and SiN/a-Si double layers passivated substrates. After annealing for 1 sec, the
effective lifetime increased in the SiN/SiN and SiN/a-Si double layers. However, for longer annealing durations, the
effective lifetimes decreased due to the blistering which occurred in the Si-rich SiN and the amorphous silicon layer.
Furthermore SiN/SiN double layers showed better J0s and Voc,l values than those of SiNx:H single layers and SiN/a-Si
double layers.
Recursive Starlight and Bias Estimation for High-Contrast Imaging with an Extended Kalman Filter
Creators: name: Riggs, A J Eldorado
name: Kasdin, N. Jeremy
name: Groff, Tyler D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: For imaging faint exoplanets and disks, a coronagraph-equipped observatory needs focal plane wavefront correction to recover high contrast. The most efficient correction methods iteratively estimate the stellar electric field and suppress it with active optics. The estimation requires several images from the science camera per iteration. To maximize the science yield, it is desirable both to have fast wavefront correction and to utilize all the correction images for science target detection. Exoplanets and disks are incoherent with their stars, so a nonlinear estimator is required to estimate both the incoherent intensity and the stellar electric field. Such techniques assume a high level of stability found only on space-based observatories and possibly ground-based telescopes with extreme adaptive optics. In this paper, we implement a nonlinear estimator, the iterated extended Kalman filter (IEKF), to enable fast wavefront correction and a recursive, nearly-optimal estimate of the incoherent light. In Princeton's High Contrast Imaging Laboratory we demonstrate that the IEKF allows wavefront correction at least as fast as with a Kalman filter and provides the most accurate detection of a faint companion. The nonlinear IEKF formalism allows us to pursue other strategies such as parameter estimation to improve wavefront correction.
description: 30 pages, 14 figures
Pi01 encodability and omniscient reductions
Creators: name: Monin, Benoit
name: Patey, Ludovic
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: A set of integers $A$ is computably encodable if every infinite set of integers has an infinite subset computing $A$. By a result of Solovay, the computably encodable sets are exactly the hyperarithmetic ones. In this paper, we extend this notion of computable encodability to subsets of the Baire space and we characterize the $Π^0_1$ encodable compact sets as those who admit a non-empty $Σ^1_1$ subset. Thanks to this equivalence, we prove that weak weak König's lemma is not strongly computably reducible to Ramsey's theorem. This answers a question of Hirschfeldt and Jockusch.
description: 9 pages
CuInGaSe2/CdS Thin Film Solar Cells Made by New Precursors Prepared by Sputtering
Creators: name: Romeo, N.
name: Bosio, A.
name: Romeo, A.
name: Menossi, D.
name: Mazzamuto, S.
name: Piccinelli, F.
name: Bettinelli, M.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
CIS and Other (II-VI) Ternary Thin Film Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2930-2932
description: CuInGaSe2/CdS thin film solar cells have been prepared by using only sputtering and selenization in a Se
vapour. First of all, a precursor for the formation of a thin film of CuInSe2 is prepared on a one inch square soda-lime glass
by sputtering in sequence Mo, In2Se3 and Cu. The staked layers are annealed at 400°C for half an hour and then selenized at
530°C for 10 minutes. In this way, a uniform CuInSe2 film is obtained.
In order to get a CuInGaSe2 film, an alloy of Cu-Ga is deposited by sputtering on top of CuInSe2 and the stacked
CuInSe2/Cu-Ga is selenized at 530°C for 10 minutes. Solar cells are prepared by depositing in sequence CdS, intrinsic ZnO
and Al-doped ZnO. 14% uniform efficiencies on 1 inch square area are easily obtained. Since this process uses only
sputtering and selenization techniques, it is suitable to be scaled-up to large area production.
UAV-Assisted Heterogeneous Networks for Capacity Enhancement
Creators: name: Sharma, Vishal
name: Bennis, Mehdi
name: Kumar, Rajesh
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Modern day wireless networks have tremendously evolved driven by a sharp increase in user demands, continuously requesting more data and services. This puts significant strain on infrastructure based macro cellular networks due to the inefficiency in handling these traffic demands, cost effectively. A viable solution is the use of unmanned aerial vehicles (UAVs) as intermediate aerial nodes between the macro and small cell tiers for improving coverage and boosting capacity. This letter investigates the problem of user demand based UAV assignment over geographical areas subject to high traffic demands. A neural based cost function approach is formulated in which UAVs are matched to a particular geographical area. It is shown that leveraging multiple UAVs not only provides long range connectivity but also better load balancing and traffic offload. Simulation study demonstrate that the proposed approach yields significant improvements in terms of 5th percentile spectral efficiency up to 38\% and reduced delays up to 37.5\% compared to a ground-based network baseline without UAVs.
description: 4 Pages: Accepted in IEEE Communications Letters, 2016
Coherent dynamics in the rotor tip shear layer of utility scale wind turbines
Creators: name: Yang, Xiaolei
name: Hong, Jiarong
name: Barone, Matthew
name: Sotiropoulos, Fotis
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Recent field experiments conducted in the near-wake (up to 0.5 rotor diameters downwind of the rotor) of a 2.5 MW wind turbine using snow-based super-large-scale particle image velocimetery (SLPIV) (Hong et al., Nature Comm., vol. 5, 2014, no. 4216) were successful in visualizing tip vortex cores as areas devoid of snowflakes. The so-visualized snow voids, however, suggested tip vortex cores of complex shape consisting of circular cores with distinct elongated comet-like tails. We employ large-eddy simulation (LES) to elucidate the structure and dynamics of the complex tip vortices identified experimentally. The LES is shown to reproduce vortex cores in good qualitative agreement with the SLPIV results, essentially capturing all vortex core patterns observed in the field in the tip shear layer. We show that the visualized vortex patterns are the result of energetic coherent dynamics in the rotor tip shear layer driven by interactions between the tip vortices and a second set of counter-rotating spiral vortices intertwined with the tip vortices. We further show that the mean flow within the region where such rich coherent dynamics occur satisfies the instability criterion proposed by Leibovich and Stewartson (J. Fluid Mech., vol. 126, 1983, pp. 335--356), indicating that the instability uncovered by the SLPIV and the LES is of centrifugal type. This study highlights the feasibility of employing snow voids to visualize tip vortices and demonstrates the enormous potential of integrating SLPIV with LES as a powerful tool for gaining novel insights into the wakes of utility scale wind turbines.
description: 10 pages, 6 figures, submitted to Journal of Fluid Mechanics
D4.3: Security assessment of cyberphysical flow of information in strategic, tactical and operational dimensions regarding DWC digital solutions
Creators: name: Bour, Guillaume
name: Ugarelli, Rita
name: Bosco, Camillo
name: Jaatun, Martin Gilje
Publisher: name: Zenodo
Year: 2022

description: This report builds on D4.1 and D4.2 to provide digital solution providers and water utilities with the tools and means to perform security assessments of the cyber-physical flow of information in strategic, tactical, and operational dimensions. We developed a risk guide aiming at supporting water organisations in the implementation of a complete risk management process in order to increase the preparedness of water operators against potential cyber and/or physical threats connected to the digital solutions adopted. In addition, a series of security recommendations and best practices for technology providers are described. Two digital solutions served as use cases to test and validate the risk guide and the security black box testing methodology presented as part of the security recommendations. Overall, this document describes a full process for secure integration of digital solutions within water utilities.
Strong coupling and high contrast all optical modulation in atomic cladding waveguides
Creators: name: Stern, Liron
name: Desiatov, Boris
name: Mazurski, Noa
name: Levy, Uriel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In recent years we are witnessing a flourish in research aimed to facilitate alkali vapors in guided wave configurations. Owing to the significant reduction in device dimensions, the increase in density of states, the interaction with surfaces and primarily the high intensities carried along the structure, a rich world of light vapor interactions can be studied, and new functionalities, e.g. low power nonlinear light-matter interactions can be achieved. One immense remaining challenge is to study the effects of quantum coherence and shifts in such nano-scale waveguides, characterized by ultra-small mode areas and fast dynamics. Here, we construct a serpentine silicon-nitride wave guide, having atomic vapor as its cladding. The unprecedented mode volume of 5e-13 m^3 supported over a length of 17 mm is used to demonstrate efficient linear and non-linear spectroscopy. Fascinating and important phenomena such as van der Waals shifts, dynamical stark shifts, and coherent effects such as strong coupling (in the form of Autler Townes splitting) are all observed. The serpentine atomic cladding is a promising building block for a variety of light vapor experiments, as it offers a very small footprint, enables operation with relatively low density of atoms and extremely strong confinement of light and vapor. As such it may be used for important applications, such as all optical switching, frequency referencing, and magnetometry to name a few.
Numerische und experimentelle Untersuchung verschiedener Konzepte zur personenorientierten Kühlung mittels Phasenwechselmaterialien
Creators: name: Richter, Finn
Publisher: name: TUHH Universitätsbibliothek
Year: 2023
Subjects: subject: Personenorientierte Kühlung
subject: Phasenwechselmaterial
subject: Thermische Behaglichkeit
subject: Feldstudie
subject: Computational Fluid Dynamics (CFD)
subject: Experiment
classificationCode: 620
subject: Ingenieurwissenschaften

description: Personenorientierte Komfortsysteme zur sommerlichen Kühlung, die das konditionierte Luftvolumen auf einzelne Körperteile oder Wirkbereiche des Nutzers reduzieren, werden untersucht. Die Verwendung von Phasenwechselmaterialien ermöglicht eine Kühlung ohne Kältemaschine. Das entwickelte Kühlelement beschränkt die Kühlung auf Hände und Torso des Nutzers. Bei einer maximalen elektrischen Leistung von 1,3 W wird über einen Zeitraum von drei Stunden bei einer Raumtemperatur von 27 °C eine durchschnittliche Temperaturdifferenz von 2,2 K über das Kühlelement erreicht. Die Kühlleistung beträgt 18,5 W bei einem COP von 18,12. Neben der energetischen Bewertung wird der positive Einfluss des Kühlelements auf den thermischen Komfort in einer Feldstudie mit zehn Teilnehmern anhand von Fragebögen bestätigt.
description: Personal comfort systems, which reduce the conditioned air volume to individual body parts or effective areas of the user, for summer cooling are being investigated. The use of phase change materials allows cooling without a chiller. The developed cooling element limits cooling to the user's hands and torso. With a maximum electrical power requirement of 1.3 W, an average temperature difference of 2.2 K can be achieved over a period of three hours at a room temperature of 27 °C via the cooling element. The cooling capacity is 18.5 W with a COP of 18.12. In addition to the energy evaluation, the positive influence of the phase change material cooling element on thermal comfort is confirmed in a field study with ten participants using questionnaires.
A Dynamic Facial Recognition System Using Control Analytics
Creators: name: Isiaka, Fatima
name: Zainab, Adamu
Publisher: name: International Journal of Artificial Intelligence and Cognitive Psychology
Year: 2024

description: Advances in facial recognition system as reached the stage where it is capable of matching a person’s face from a digital image or a video sequence against a database of unrecognised faces which are typically employed to base authentic user through ID verification services, by mapping facial features from a given image. One of the obstacles related to the angle view of the face is the twenty degrees off of frontalfaces, which are obtruded when one goes towards the profile, its low-resolution face images are sometimes difficult to verify. To tackle the problem of inconsistency, this paper adopts the use of a time state-space model for real-time facial recognition as a form of intelligent analytics that produces a pass and the cognitive state ofthe user during a scan. This process is based on two modules: (1) real-time image capture by the camera port of a PC and (2) embedding a dynamic control to the analytic tool for easy verification and evasion of false case detection.
Theory of electronic and spin-orbit proximity effects in graphene on Cu(111)
Creators: name: Frank, Tobias
name: Gmitra, Martin
name: Fabian, Jaroslav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study orbital and spin-orbit proximity effects in graphene adsorbed to the Cu(111) surface by means of density functional theory (DFT). The proximity effects are caused mainly by the hybridization of graphene $π$ and copper d orbitals. Our electronic structure calculations agree well with the experimentally observed features. We carry out a graphene-Cu(111) distance dependent study to obtain proximity orbital and spin-orbit coupling parameters, by fitting the DFT results to a robust low energy model Hamiltonian. We find a strong distance dependence of the Rashba and intrinsic proximity induced spin-orbit coupling parameters, which are in the meV and hundreds of $μ$eV range, respectively, for experimentally relevant distances. The Dirac spectrum of graphene also exhibits a proximity orbital gap, of about 20 meV. Furthermore, we find a band inversion within the graphene states accompanied by a reordering of spin and pseudospin states, when graphene is pressed towards copper.
Operando structure-activity profiling in fixed-bed reactors using synchrotron-based X-Ray techniques
Creators: name: Wollak, Birte
Publisher: name: TUHH Universitätsbibliothek
Year: 2023
Subjects: subject: Heterogeneous catalysis
subject: Operando
subject: Synchrotron
classificationCode: 540
subject: Chemie

description: In dieser Arbeit wurde eine Methode für die simultane Messung von Konzentrations-, Temperatur-, und Röntgenabsorptions- oder Röntgendiffraktionsprofilen in Festbettreaktoren mittels Synchrotronstrahlung entwickelt. Die Methode bietet einen umfangreichen Einblick in katalytische Festbettreaktoren während des Betriebs, und fördert damit zukünftig eine effiziente und nachhaltige Optimierung katalytischer Prozesse. Die Stärken der Methode wurden durch Untersuchungen der oxidativen Dehydrierung von Ethan an geträgerten Molybdänoxidkatalysatoren demonstriert, in der das Zusammenspiel der lokalen Reaktionsbedingungen und der Katalysatorstruktur gezeigt wurde.
description: In this work a method was developed allowing for the simultaneous measurement of species concentration-, temperature-, and X-ray absorption or X-ray diffraction profiles through a fixed-bed reactor using synchrotron radiation. The method provides a comprehensive insight into catalytic reactors under operation, promoting an efficient and sustainable optimization of catalytic processes in the future. The strengths of the method were demonstrated by studying the oxidative dehydrogenation of ethane over supported molybdenum oxide catalysts, revealing the interplay between local reaction conditions and catalyst structure.
Laser Transfer Doping Using Amorphous Silicon
Creators: name: Ferré, R.
name: Müller, J.
name: Harder, N.-P.
name: Kessler, M.
name: Mader, C.
name: Giesel, P.
name: Neubert, T.
name: Brendel, R.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 879-883
description: We demonstrate and characterize “Laser Transfer Doping” (LTD) for producing locally doped regions.
For this purpose we use nanosecond pulsed laser for transferring phosphorus doped amorphous silicon from a carrier
glass to silicon wafers. The phosphorus is transferred into the silicon wafer substrate and produces local doping. We
use this process to produce local high-low junctions for the formation of n+-n Back or Front Surface Fields that are
directly contacted with aluminum. We find low surface recombination velocities and low contact resistance when
transferring layers through a thin (13 nm) thermally grown silicon oxide. We also apply this process for contacting
the phosphorus-doped front surface field of n-type rear junction solar cells. With this contact system we achieve open
circuit voltages above 670 mV and fill factors close to 80%. The best solar cell efficiency in these initial investigation
reaches 19.4% with open-circuit voltage of 664 mV and fill factor of 75.6%.
title: Детали мехатронных модулей
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2023

description: В данном учебном пособии изложены методы расчета деталей преобразователей движения, необходимые для конструирования мехатронных модулей. Особое внимание уделяется разным видам и классификациям соединений и передач. Автором подробно рассмотрены конструктивные отличия основных деталей преобразователей движения мехатронных модулей от деталей передач общего назначения. Подготовлено в соответствии с требованиями Федерального государственного образовательного стандарта высшего образования. Учебное пособие предназначено для бакалавров и магистрантов направлений подготовки 15.03.06, 15.04.06 «Мехатроника и робототехника», изучающих дисциплины «Детали мехатронных модулей, роботов и их конструирование», «Детали машин» и «Прикладная механика».
Evaluating the Outdoor Performance of PV Modules with Different Glass Textures
Creators: name: Williams, S.R.
name: Betts, T.R.
name: Gottschalg, R.
name: Neumann, D.
name: Prast, M.-O.
name: Nositschka, A.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3152-3156
description: Optical losses can have a significant impact on energy yield and revenue from PV systems. Saint-
Gobain has developed specialised textured front glasses and anti-reflection coatings for PV modules in a bid to
reduce these losses in a cost-effective way. The Centre for Renewable Energy Systems Technology in the UK has run
a two-year study assessing the real-world impact of these approaches, both in terms of rated power under simulated
sunlight and real energy yield under long-term outdoor exposure with continuous monitoring. Anti-reflection coating
applied to mono-crystalline silicon modules and glass texturing applied to poly-crystalline silicon modules resulted in
2.2-2.9% increase in rated power measured at Standard Test Conditions in the lab, with respect to reference modules
with uncoated/untextured glass. Outdoors, the treated modules demonstrated up to 1.9% higher specific energy yield
over the two-year programme, leading to absolute gains of 3.0-4.3% over the standard modules.
High Reliability of SunPower Modules with >20% Efficiency
Creators: name: Kim, S.D.
name: Bunea, G.
name: Boitnott, N.
name: Kavulak, D.
name: Peurach, J.
name: Gonzalgo, A.
name: Gacho, E.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3103-3106
description: Twenty percent efficient modules have recently been produced on a large PV manufacturing scale by
the SunPower Corporation. The ability to manufacture 20% efficient modules on a large commercial scale is an
important milestone for the PV industry. Of equal importance, the reliability/durability of these high efficiency
modules, representing a lifetime significantly longer than 25 year, needs to be confirmed. The present study
summarizes years of thorough reliability studies and utilizes both accelerated aging and real-world field conditions to
validate the PV modules robust resistance to humidity, temperature, UV, and high voltage. The experimental results
and modeling studies demonstrate that ultra high efficiency c-Si PV modules with excellent reliability/durability can
be produced on a large commercial scale by optimized module and cell technology.
Fritillaria formica subsp. digitata Lohmann
Creators: name: Karunarathne, Krishan D.
name: Croos, M. D. S. T. De
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Appendicularia
Copelata
Fritillariidae
Fritillaria
Fritillaria formica
Fritillaria formica digitata lohmann

description: Fritillaria formica digitata Lohmann, in Lohmann & Bückmann, 1926
Fritillaria formica var. Langerhans Lohmann 1896: 28.
Fritillaria formica f. digitata: Lohmann & Bückmann 1926: 167.
Fritillaria (Acrocercus) formica f. digitata: Tokioka 1960: 355.
Fritillaria formica digitata: Fenaux 1993: 63, 70, 83; 1998: 303, 304. Aravena & Palma 2002: 320, Fig. 10A.
Material examined. Eleven specimens (MDAFWU 2020 /373–383), St.205, January 2020.
Description. Trunk 1–2 mm long and strongly bent upwards in the digestive nucleus region. Mouth with upper and lower lips; the median lobe of the upper lip short and provided anteriorly with two finger-shaped bulges. Spiracles are small and circular. The ciliated spiraclular rings do not contact the mid-ventral line. Axis of the alimentary tract longitudinal. The posterior margin of the oikoplastic layer is extended to the stomach. Testis is more or less conical with circular angles in mature specimens. The distal extremity of the tail acuminate.
Global distribution. The Antarctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean, the Mediterranean Sea and the Red Sea (Fenaux et al. 1998). Type locality: Madeira, NE Atlantic Ocean.
description: Published as part of Karunarathne, Krishan D. & Croos, M. D. S. T. De, 2021, Pelagic tunicates (Appendicularia and Thaliacea) of Sri Lanka: two first records with an annotated checklist, pp. 352-376 in Zootaxa 5067 (3) on page 356, DOI: 10.11646/zootaxa.5067.3.2, http://zenodo.org/record/5681899
Mass Production and Field Performance of Durable Metal-Wrap-Through Integrated Back Contact Foil Based “Sunweb” Modules
Creators: name: Augustin, L.M.
name: Van Den Donker, M.N.
name: Scholten, H.
name: Zell, M.
name: Claussen, W.
name: Van Straaten, B.
name: Copetti, C.
name: Fleuster, M.
name: Feldhaus, M.
name: Schier, D.
name: Fliedner, U.
name: Wangemann, K.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3113-3116
description: The Sunweb technology platform allows for industrial fabrication of modules based on Metal Wrap
Through (MWT) cells and Back Contact Foil (BCF) interconnection. We explain why these modules show a 10%
higher total area module efficiency than standard H-pattern tab-interconnected modules. Latest results on
manufacturability and reliability are discussed as well and demonstrate the maturity of the technology. Finally, results
of outdoor measurements in Petten and Stuttgart are reported that show the performance ratio of Sunweb modules to
be equal to that of modules from leading competitors. We finally conclude that the Sunweb technology platform
allows the generation of 10% more kWh/m2.
Innovative and Gentle Interconnection Technique for High Efficiency c-Si Solar Cells and Cost-of-Ownership-Analysis (COO)
Creators: name: Zemen, Y.
name: Trommler, H.
name: Wolter, K.
name: Geipel, T.
name: Berghold, J.
name: Pingel, S.
name: Litzenburger, B.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3125-3132
description: The interconnection of solar cells in PV module production has been identified as an important process
regarding long term reliability of solar modules. In standard module production soldering is used to interconnect the
solar cells to strings. Due to substantial changes of solar cell metallization, soldering seems to be not the suitable
interconnection technique for high efficiency modules.
This paper is focusing on the implementation and development of innovative solar cell interconnection techniques for
PV module production. The utilization of conductive paste or conductive film for c-Si cells is investigated. The
advantages are obvious: it is possible to interconnect thinner cells as nowadays standard, to work with heterojunction
cells with temperature sensitive layers, to avoid hazardous substances in PV module production (restriction of
hazardous substances conformity) and flux less interconnection. Additionally, the cost reduction potential compared
to soldering is investigated. The opportunity of cost reduction even by using of new interconnection techniques such
as conductive adhesive (paste) or conductive film will be shown. Furthermore, conductive adhesive filled with carbon
nanotubes, as alternative to Ag filled, has been produced and investigated. IV-curves, electroluminescence (EL),
cross section analysis and climate chamber reliability tests have been utilized for detailed evaluation.
Fuzzy Logic Control of a Hybrid Energy Storage Module for Naval Pulsed Power Applications
Creators: name: Cohen, Isaac J.
name: Wetz, David A.
name: Veiga, Stepfanie
name: Dong, Qing
name: Heinzel, John
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: There is need for an energy storage device capable of transferring high power in transient situations aboard naval vessels. Currently, batteries are used to accomplish this task, but previous research has shown that when utilized at high power rates, these devices deteriorate over time causing a loss in lifespan. It has been shown that a hybrid energy storage configuration is capable of meeting such a demand while reducing the strain placed on individual components. While designing a custom converter capable of controlling the power to and from a battery would be ideal for this application, it can be costly to develop when compared to purchasing commercially available products. Commercially available products offer limited controllability in exchange for their proven performance and lower cost point - often times only allowing a system level control input without any way to interface with low level controls that are frequently used in controller design. This paper proposes the use of fuzzy logic control in order to provide a system level control to the converters responsible for limiting power to and from the battery. A system will be described mathematically, modeled in MATLAB/Simulink, and a fuzzy logic controller will be compared with a typical controller.
Current Voltage Analyses for Cu(In,Ga)(S,Se)2 Based Solar Cell by a New Approach
Creators: name: Pakma, O.
name: Kavasoglu, A.S.
name: Kavasoglu, N.
name: Oktik, S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
CIS and Other (II-VI) Ternary Thin Film Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2914-2916
description: In the experimental part of this study the current–voltage (I-V) characteristics of Cu(In,Ga)(S,Se)2
based solar cells have been measured as a function of temperature in dark. Devices displayed non-ideal I-V
characteristics such as barrier inhomogeneities, strongly bias-dependent current collections and, ohmic-like behavior.
Analyses of the experimental data were carried out using “Beta Method” developed at Mugla University [1,2]. The
results showed that the values and temperature dependency of ideality factor are in a good agreement with thermally
activated tunneling recombination current transport mechanism with to two characteristics tunneling energies of 26
meV and 690 meV.
Quartic amplitudes for Minkowski higher spin
Creators: name: Bengtsson, Anders K. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The problem of finding general quartic interaction terms between fields of higher helicities on the light-front is discussed from the point of view of calculating the corresponding amplitudes directly from the cubic vertices using BCFW recursion. Amplitude based no-go results that has appeared in the literature are reviewed and discussed and it is pointed out how they may perhaps be circumvented.
description: 23 pages, 1 figure. Updated talk given at the Intl. workshop on Higher Sping Gauge Theory at the Inst. of Advanced Studies at Nanyang Technological University in Singapore, November 4 - 6, 2015
Progress on High Efficiency Standard and Interdigitated Back Contact Silicon Heterojunction Solar Cells
Creators: name: Muñoz, D.
name: Desrues, T.
name: Ozanne, A.-S.
name: Nguyen, N.
name: De Vecchi, S.
name: Souche, F.
name: Martin De Nicolàs, S.
name: Denis, C.
name: Ribeyron, P.-J.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 861-864
description: In this paper we show the state-of-the-art on the research on standard and interdigitated back contact
amorphous/crystalline heterojunction (HJ) solar cells at INES. First, we focus our study on the optimization and the
comprehension of the role of the front buffer layer of our n-type HJ solar cells on the totality of the device parameters
(Jsc, FF, Voc). This work allows us to reach very high Voc values over 730mV without losses on FF and efficiencies
of 21%. We observe that short-circuit current is the limiting parameter on our cells, and though we go over a new
structure without shadowing loses, the so-called interdigitated back contact amorphous/crystalline silicon
heterojunction (IBC-HJ). Simplified cell geometry is here proposed with the emitter and BSF layers locally in
contact. To avoid resistive losses (shunt effects or series resistance), it is found that the emitter stack has to be
carefully designed in terms of doping profile and contact material. Using patterning steps based on screen printing
technology, 25 cm2 simplified IBC Si-HJ structures have been fabricated with an efficiency of 15.7%.
Dynamics and protection of entanglement in n-qubit systems within Markovian and non-Markovian environments
Creators: name: Nourmandipour, Alireza
name: Tavassoly, Mohammad Kazem
name: Rafiee, Morteza
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide an analytical investigation of the pairwise entanglement dynamics for a system, consisting an arbitrary number of qubits dissipating into a common and non-Markovian environment for both weak and strong coupling regimes. In the latter case, a revival of pairwise entanglement due to the memory depth of the environment is observed. The leakage of photons into a continuum state is assumed to be the source of dissipation. We show that for an initially Werner state, the environment washes out the pairwise entanglement, but a series of non-selective measurements can protect the relevant entanglement. On the other hand, by limiting the number of qubits initially in the superposition of single excitation, a stationary entanglement can be created between qubits initially in the excited and ground states. Finally, we determine the stationary distribution of the entanglement versus the total number of qubits in the system.
Phosphorus-bearing molecules in massive dense cores
Creators: name: Fontani, F.
name: Rivilla, V. M.
name: Caselli, P.
name: Vasyunin, A.
name: Palau, Aina
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Phosphorus is a crucial element for the development of life, but so far P-bearing molecules have been detected only in a few astrophysical objects, hence its interstellar chemistry is almost totally unknown. Here we show new detections of phosphorus nitride in a sample of dense cores in different evolutionary stages of the intermediate- and high-mass star formation process: starless, with protostellar objects, and with ultracompact HII regions. All detected PN line widths are smaller than ~5 km/s , and they arise from regions associated with kinetic temperatures smaller than 100 K. Because the few previous detections reported in the literature are associated with warmer and more turbulent sources, the results of this work show that PN can arise from relatively quiescent and cold gas. This information is challenging for theoretical models that invoke either high desorption temperatures or grain sputtering from shocks to release phosphorus into the gas phase. Derived column densities are of the order of 10^{11-12} cm^{-2}, marginally lower than the values derived in the few high-mass star forming regions detected so far. New constraints on the column density upper limit of phosphorus monoxide, the fundamental unit of biologically relevant molecules, are also given.
description: 2 figures, accepted for publication in ApJ Letters
Mayamaea sweetloveana Zidarova, Kopalova & Van de Vijver 2016, sp. nov.
Creators: name: Zidarova, Ralitsa
name: Kopalová, Kateřina
name: Vijver, Bart Van De
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Chromista
Ochrophyta
Bacillariophyceae
Naviculales
Naviculaceae
Mayamaea
Mayamaea sweetloveana

description: Mayamaea sweetloveana Zidarova, Kopalová & Van de Vijver, sp. nov. (Figs 46–58)
 LM observations (Figs 46–56): Valves elliptic with convex margins and broadly rounded, never protracted apices. Valve dimensions (n=20): length 6.0–7.0 μm, width 3.0–3.5 μm. Axial area very narrow, linear, conforming with the sternum. Central area almost entirely lacking. Raphe straight, enclosed in a heavily silicified sternum. Distal raphe fissures not discernible in LM. Striae strongly radiate throughout the entire valve, 25–30 in 10 μm. Central striae alternatingly shortened. Areolae not discernible in LM. SEM observations (Figs 57–58): Striae composed of several square to rounded areolae, ca. 50 in 10 μm, covered externally by clearly porous hymenes. Areolae becoming more elongated near the valve mantle (Fig. 57). Around the apices areolae more slit-like, positioned at the mantle/valve face junction. External raphe branches straight with distinctly enlarged, spathulate, almost not deflected proximal raphe endings. Distal raphe fissures very short, deflected opposite to the proximal raphe endings, never continuing onto the mantle but terminating near the last striae at the apices (Fig. 57). Internal raphe branches straight with simple proximal raphe endings (Fig. 58). Distal raphe endings terminating onto small helictoglossae (Fig. 58). Areolae clearly visible as rectangular to rounded pores (Fig. 58).
 Type: — ANTARCTICA. James Ross Island: Ulu Peninsula, Nadĕje Lake, sample D24 (63° 48’ 51.9” S, 57° 50’ 05.6” W), L. Nedbalová, 13 February 2008 (holotype BR! 4452, isotype PLP! 306).
 Etymology: —The specific epithet refers to Drs. Maxime Sweetlove (Ghent University, Belgium), member of the CCAMBIO project.
 Ecology and confirmed distribution: — Mayamaea sweetloveana has up to now only been found in a few samples from James Ross Island. Due to confusion with other Mayamaea taxa such as M. atomus (Kützing 1844: 108) Lange-Bertalot (1997: 72) and M. permitis (Hustedt 1945: 919) Bruder & Medlin (2008: 327), its actual distribution is not entirely clear. The largest population (almost 75% of all counted valves) was observed in Nadĕje Lake, a cirque lake on Ulu Peninsula (James Ross Island). This is a rather shallow lake at an elevation of 240 m a.s.l. with an alkaline pH (8.4), low conductivity (<250 μS/cm) and low nutrient and phosphate values.
description: Published as part of Zidarova, Ralitsa, Kopalová, Kateřina & Vijver, Bart Van De, 2016, Ten new Bacillariophyta species from James Ross Island and the South Shetland Islands (Maritime Antarctic Region), pp. 37-62 in Phytotaxa 272 (1) on page 43, DOI: 10.11646/phytotaxa.272.1.2, http://zenodo.org/record/13647364
1366-Texture and 1366-Metallization: Superior Light Trapping and 30-Micron Fingers for Any Silicon Wafer Type at Low Cost
Creators: name: Sachs, E.M.
name: Gabor, A.M.
name: Madden, P.
name: Olibet, S.
name: Gates, H.
name: Ersen, A.
name: Tarasov, V.
name: Harris, D.
name: Passino, K.
name: Van Mierlo, F.
name: Queißer, S.
name: Heeren, A.
name: Kühnlein, H.
name: Delahaye, F.
name: Nussbaumer, H.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1475-1478
description: We present novel methods for texturing and metallizing silicon-wafer based solar cells. The texturing method forms a
hexagonal array of pits on the surface resulting in a honeycomb texture. This is achieved through the addition of a new
patterning machine prior to a modified wet etching step. The texturing used does not rely on saw damage for initiation,
and thus is compatible with any method of ingot sawing or kerfless wafer formation. It is also compatible wafers/grains
of any crystallographic orientation. Reflectivity is lower than that achieved by the industry-standard isotexture for
multicrystalline wafers. Narrow grooves can be formed simultaneously with the honeycomb texture to enable an
advanced front metallization technique while the back can be polished for rear dielectric passivation. A novel method
allows the self-aligned dispensing of materials into these grooves. Following SiNx deposition, silver paste is dispensed
into the grooves, and this thin seed layer is co-fired along with the back metallization. This seed layer can be plated up
with either Ag or Ni/Cu/Sn to form fingers <30 microns in width and >7 microns in height to enable a reduction in
resistive and shading losses compared to screen printing. Low contact resistivities of < 2 milliohm-cm2 have been
achieved on uniform and very shallow emitters ~ 90 ohms/sq with a Ag seed layer and plate-up of Ag, thus enabling
further improvements in Voc, Jsc, and FF. Large-area, encapsulated multicrystalline cells have been made with
efficiencies close to 18% by these techniques. Phosphorus dopant also can be dispensed into the grooves to enable a
simple selective emitter structure which results in no undesired band of deep emitter extending to either side of the
fingers. 1366 Technologies is currently scaling up patterning and dispensing while RENA is scaling up wet etching and
plating.
title: Design and Implementation of a Launching Method for Free to Oscillate Dynamic Stability Testing
Creators: name: Carey, Kristen M.
Publisher: name: Old Dominion University Libraries
Year: 2023

description: Magnetic Suspension and Balance Systems (MSBS) allow for static, forced oscillation and free to oscillate dynamic stability testing in a wind tunnel without the need for a physical support. The objectives of study are to assist in the application of the free to oscillate testing method in an MSBS to determine dynamic stability characteristics for various re-entry capsule designs.

This thesis discusses the development and testing of a launching method called the grabber for use in the MSBS Subsonic Wind Tunnel at NASA Langley Research Center. Aerodynamic tests were run to support the use of this method and compare the data gathered to data taken from previous runs with other supports.

Aerodynamic testing showed that the implementation of the designed launching method yielded less axial and vertical interference overall by the newly designed launcher as opposed to previous launching approaches, with the designed launching method having a maximum axial movement of 4.11 mm and a maximum vertical movement of 5.075 mm, and the other supports having displacements of more than twice that. While the outcome was successful, possible improvements and streamlined designs were identified and preliminarily developed for use in a future supersonic MSBS facility. A simulation was created to visualize the behavior of a model released into the windstream unsuspended for both subsonic and supersonic conditions. This data was mapped against the results from the launcher’s retraction to show the estimated path the model would follow. These results indicate the feasibility of this launching method in the proposed supersonic facility.