bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reconfigurable intelligent surface‐aided millimetre wave communications utilizing two‐phase minimax optimal stochastic strategy bandit
Authors: Mohamed Ehab Mahmoud , Hashima Sherief , Anjum Nasreen , Hatano Kohei , Shafai Walid El , Elhalawany Basem M. 
Published: August 2022

AbstractMillimetre wave (mmWave) communications, that is, 30 to 300 GHz, have intermittent short‐range transmissions, so the use of reconfigurable intelligent surface (RIS) seems to be a promising solution to extend its coverage. However, optimizing phase shifts (PSs) of both mmWave base station (BS) and RIS to maximize the received spectral efficiency at the intended receiver seems challenging due to massive antenna elements usage. In this paper, an online learning approach is proposed to address this problem, where it is considered a two‐phase multi‐armed bandit (MAB) game. In the first phase, the PS vector of the mmWave BS is adjusted, and based on it, the PS vector of the RIS is calibrated in the second phase and vice versa over the time horizon. The minimax optimal stochastic strategy (MOSS) MAB algorithm is utilized to implement the proposed two‐phase MAB approach efficiently. Furthermore, to relax the problem of estimating the channel state information (CSI) of both mmWave BS and RIS, codebook‐based PSs are considered. Finally, numerical analysis confirms the superior performance of the proposed scheme against the optimal performance under different scenarios.
Cooperative optimisation strategy of computation offloading in multi‐UAVs‐assisted edge computing networks
Authors: Zhang Shanxin , Cao Runyu , Jiang Zefeng 
Published: August 2022

AbstractMobile edge computing has been developed as a promising technology to extend diverse services to the edge of the Internet of Things system. Motivated by the high flexibility and controllability of unmanned aerial vehicles (UAVs), a multi‐UAVs‐assisted mobile edge computing system is studied to reduce the total consumption of time and energy of terminal equipments. In this system, UAVs act as the computing nodes or relay nodes for process terminal equipment's task. Accordingly, an optimisation problem is formulated to minimise the weighted sum of energy and delay consumption in the edge computing network. To solve the problem, an asynchronous advantage actor–critic (A3C) based deep reinforcement learning algorithm is proposed to obtain the optimal strategy for computation offloading and resource allocation. Experimental results demonstrate that the proposed A3C based algorithm converges fast and outperforms the baseline algorithms in terms of the energy and time consumption of system.
Melamine sponge decorated with Fe3O4/CuS nanoparticles as novel peroxidase‐like nanozyme for disinfection
Authors: Yang Xiaoni , Guo Aiying , Du Liqiang , Qin Baoping , Wang Xiuping , Cai Aijun 
Published: August 2022

AbstractA melamine sponge‐supported Fe3O4/CuS nanozyme with highly peroxidase‐like activity was fabricated using polydopamine (PDA) as adsorption agent (named as S/PDA/Fe3O4/CuS). Fe3O4 and CuS nanoparticles were well dispersed on the surface of melamine sponge. Effects of reaction parameters such as temperature and solution pH on peroxidase‐like activity were investigated. S/PDA/Fe3O4/CuS exhibited highly disinfection efficiency against both Escherichia coli and Staphylococcus aureus in the presence of trace H2O2 (100 μm). ·OH radicals were found to be the main reactive oxygen species.
Meter placement algorithms to enhance distribution systems state estimation: Review, challenges and future research directions
Authors: Zeraati Mehdi , Shabanzadeh Morteza , Sheibani Mohammad Reza , Jabari Farkhondeh 
Published: August 2022

AbstractIncreasing the number of measurements in power distribution networks is crucial in improving the monitoring accuracy and operation quality. However, due to the large number of nodes in distribution networks, it is not economically possible to install meters in all nodes. State estimation as a useful tool can help to reduce the need for meters. The location of meters has a significant effect on the state estimation results. A comprehensive literature review of the optimal meter placement methods in distribution networks with the aim of improving state estimation is presented in this paper. These methods are compared in terms of the objective function and constraints of the optimization problem, relevant uncertainties, types of state estimation algorithms and the solution methods. This paper provides a detailed insight for researchers and network operators about the types of meter placement methods, their advantages and disadvantages, existing barriers, and future research areas.
Immunadsorption zur Herstellung von COVID-19
Antikörperkonzentraten
Authors: Rothenburg Jannik , Rink-Baron Silke , Müller Lisa , Ostermann Philipp Niklas , Fischer Johannes , Stegbauer Johannes , Moldenhauer Anja 
Published: August 2022

ZusammenfassungSeit mehr als 2 Jahren hält die COVID-19 Pandemie die ganze Welt in Atem.
Vor Einführung der Impfung schien die Anwendung von Frischplasmen
rekonvaleszenter Spender nach Einzelfallberichten ein vielversprechender
Therapieansatz, insbesondere, wenn sie bereits in der Frühphase der
Erkrankung eingesetzt werden. In multizentrischen Studien großer
Fallzahlen blieben die Ergebnisse unter den Erwartungen, weshalb in Deutschland
keine eindeutige Leitlinienempfehlung zur Anwendung von rekonvaleszenten Plasmen
(RKP) existiert.Ein Grund dafür könnten schwankende und zu Beginn der
RKP-Anwendung zu niedrige Konzentrationen an COVID-19 Antikörpern in der
überwiegenden Zahl der Plasmaeinheiten sein – was wiederum das
Ausbleiben einer überzeugenden klinischen Wirksamkeit erklären
könnte.Daher verfolgen wir eine Strategie, die die selektive Sammlung und Konzentrierung
menschlicher Immunglobuline aus einer Spende mittels Immunadsorption
ermöglicht.
Die Verordnung (EU) 2017/746 des Europäischen
Parlaments über In-vitro-Diagnostika
Authors: Weinstock Christof , Vogeser Michael 
Published: August 2022

ZusammenfassungVon den klinisch tätigen medizinischen Akteuren nahezu unbemerkt trat am
26. Mai 2017 die vom Europaparlament verabschiedete Verordnung (EU)
2017/746 über In-vitro-Diagnostika in Kraft. Die Verordnung
löste die im Jahr 1998 von der Europäischen Gemeinschaft
verabschiedete Richtlinie 98/79/EG ab, in der damals
grundlegende Anforderungen an die Herstellung und Zulassung und an das
Inverkehrbringen von In-vitro-Diagnostika formuliert wurden. Dieser Beitrag
beschreibt die Neuerungen für industrielle Hersteller und für
Labore, die selbst In-vitro-Diagnostika herstellen (Eigenherstellung).
Behandlungsverhalten und Wünsche an die Therapie aus Sicht von jungen Erwachsenen mit Diabetes mellitus Typ 1
Authors: Seibert Lea Kristin , Grieskamp Ricarda Margitta , Schmidt Hannah , Menrath Ingo , Pawils Silke , Rumpf Hans-Jürgen , von Sengbusch Simone 
Published: August 2022

Zusammenfassung
Hintergrund Bei Jugendlichen und jungen Erwachsenen (JujE) mit Diabetes mellitus Typ 1 (DMT1) werden gehäuft Behandlungsverhaltensweisen beobachtet, die mit ungünstigen Gesundheitsoutcomes assoziiert sind. Darüber hinaus verläuft der in diesem Alter erforderliche Transitionsprozess oft problematisch. Insgesamt ist diese Altersspanne mit einem erhöhten Risiko für akute Komplikationen und langfristige Folgeschäden assoziiert. Ziel der Studie ist es, Gründe für Therapieunzufriedenheit und ungünstiges Behandlungsverhalten aus Sicht der JujE zu explorieren und den Bedarf sowie konkrete Empfehlungen für ein zusätzliches psychologisches Coaching abzuleiten.
Methode Insgesamt wurden 15 qualitative Interviews mit JujE (Alter M=20.2; SD=3.1 Jahre; 53.3% weiblich) geführt. Zudem wurden die Soziodemographie und depressive Symptomatik (PHQ-9; Patient Health Questionnaire) erhoben.
Ergebnisse Die Ergebnisse deuten darauf hin, dass Behandlungsunzufriedenheit und ungünstiges Behandlungsverhalten mit direktiven Kommunikationsmustern sowie einer fehlenden persönlichen Bindung zu den Behandler:innen assoziiert sind. Zudem werden psychische Belastungen aus Sicht der Befragten unzureichend thematisiert. Die JujE wünschten sich insbesondere Kontinuität im Behandlungsteam sowie einen empathischen Umgang. Die Idee eines zusätzlichen Coachings wurde positiv aufgenommen. Hierbei besteht der Wunsch nach bedürfnisorientierter Ausgestaltung.
Diskussion Mögliche Barrieren von Adhärenz und psychische Belastungen sollten offen erfragt und thematisiert werden. Insbesondere bei psychisch belasteten JujE könnte das Behandlungsverhalten möglicherweise durch zusätzliche niederschwellige Coachingangebote verbessert werden. Eine randomisiert-kontrollierte Studie ist noch ausstehend.
Der Letzte Hilfe Kurs professionell – erste Erfahrungen mit einem eintägigen niedrigschwelligen Palliative Care Fortbildungsangebot für Personal aus dem Gesundheitswesen
Authors: Bollig Georg , Schmidt Marina , Aumann Dirk , Knopf Boris 
Published: August 2022

Zusammenfassung
Hintergrund und Ziel Der Letzte Hilfe Kurs für die Bevölkerung ist ein niedrigschwelliges Angebot zur Information über Begleitung am Lebensende in nur vier Unterrichtseinheiten. Ziel der aktuellen Studie ist die Evaluation der Machbarkeit sowie der Beurteilung des neu entwickelten Letzte Hilfe Kurses professionell für Mitarbeiter im Gesundheitswesen mit 10 Unterrichtseinheiten durch die Teilnehmer*innen.
Materialien und Methoden Vier Online Letzte Hilfe Kurse professionell mit 60 Teilnehmern*innen aus verschiedenen Bereichen des Gesundheitswesens wurden durchgeführt. Die Evaluation basiert auf mixed-methods mit einem Fragebogen und Fokusgruppeninterviews via Video. Die Interviews wurden digital aufgezeichnet. Die Analyse und Präsentation der Daten basiert auf qualitative description und qualitativer Inhaltsanalyse.
Ergebnisse 53 von 60 Teilnehmer*innen (88%) nahmen an Fokusgruppeninterviews teil. 36 der 60 Teilnehmer*innen (60%) beteiligten sich zusätzlich an der Evaluation durch Ausfüllen eines Fragebogens. 33 von 36 Teilnehmer*innen (92%) geben an, den Kurs weiterempfehlen zu wollen. 32 von 36 Teilnehmer*innen (89%) halten den Kurs für hilfreich für alle Berufsgruppen im Gesundheitswesen. Die Ergebnisse aus den Fragebögen und Fokusgruppeninterviews zeigten, dass die Mehrzahl der Teilnehmer*innen den Kurs hilfreich für alle Berufsgruppen im Gesundheitswesen finden und die Erweiterung des Blickwinkels, die Eröffnung neuer Perspektiven sowie die Reflektion und Erarbeitung von Handlungsoptionen in der Palliativversorgung schätzen.
Schlussfolgerungen und Ausblick Die Kurse wurden von den Teilnehmer*innen sehr gut angenommen. Ein laufendes Projekt in Schleswig-Holstein soll den Effekt der Kurse in einem größeren Rahmen und mit höherer Teilnehmerzahl weiter evaluieren.
Postoperative Tachycardia in Deep Inferior Epigastric Perforator Flap Breast Reconstruction: Is It a Reason to Worry?
Authors: Bernstein Jaime L. , Huang Hao , Otterburn David M. 
Published: August 2022

Abstract
Background Many patients who undergo free flap breast reconstruction develop postoperative hemodynamic changes, most noticeably, tachycardia. As there is currently no consensus on whether this tachycardia leads to clinically significant morbidity, it can trigger physician alarm and lead to extensive work-up. In this study, we aim to evaluate the predictors, evaluation, and outcomes associated with postoperative tachycardia in deep inferior epigastric perforator (DIEP) flap patients.
Methods A retrospective review of DIEP flap patients between 2011 and 2020 was performed. Variables examined included demographics, preoperative laboratories and heart rate (HR), and intraoperative factors. Work-up of postoperative tachycardia and adverse postoperative events was noted. Tachycardia was defined as persistent HR of 100 beats/min or more for at least 12 consecutive hours following surgery. Tachycardic patients were compared with non-tachycardic patients using regression analysis.
Results In total, 249 patients (439 flaps) were included in this study. Sixty-one patients (24.9%) developed tachycardia postoperatively. Regression analysis revealed that preoperative HR (p = 0.002) and flap weight (p = 0.037) predicted the development of tachycardia. While tachycardic patients were significantly more likely to undergo additional imaging and specialty consultations (p <0.05), they were not at higher risk for most postoperative complications, with the exception of delayed abdominal donor-site healing.
Conclusion A significant number of DIEP flap patients can be expected to develop persistent tachycardia postoperatively. Isolated tachycardia should be considered a relatively benign finding that does not warrant extensive work-up or prolonged inpatient monitoring. Having the ability to predict tachycardia using preoperative HR and flap weight arms plastic surgeons with the confidence to limit costly work-up.
Couple-Specific Dependency Scale in Spanish adolescents and invariance by gender and relationship status (Escala de dependencia específica de la pareja en adolescentes españoles e invarianza por género y estatus de las relaciones)
Authors: Lorente-Anguís Antonia , Lopez-Zafra Esther 
Published: August 2022

Measures about dependency in romantic relations mostly focus on adults, even though the first couple relations begin during adolescence. This study aims to adapt and validate a widely used instrument in different ages, the Spouse Specific Dependence Scale, in a sample of adolescents. A total of 481 participants, 15–17 years old (Study 1 = 234, M age = 16.04 years, SD = 0.68, and Study 2 = 247, M age = 15.88, SD = 0.72), completed the scale to determine its psychometric guarantees. In Study 1, a three-dimensional model yielded adequate indices, and invariance showed that girls and boys involved in a current relationship interpret items in a similar way. Moreover, the instrument shows convergent validation with jealousy and sexism. In Study 2, adolescents who were not in a relationship were compared to the Study 1 participants. Measurement invariance by relationship status showed that the two subsamples interpret the items in a different way. Our results show that this instrument is appropriated for measuring partner dependency in adolescent couples, but only when involved in a current relationship.
Quantum backaction evading measurements of a silicon nitride membrane resonator
Authors: Liu Yulong , Zhou Jingwei , Mercier de Lépinay Laure , Sillanpää Mika A 
Published: August 2022

Abstract
Quantum backaction disturbs the measurement of the position of a mechanical oscillator by introducing additional fluctuations. In a quantum backaction measurement technique, the backaction can be evaded, although at the cost of losing part of the information. In this work, we carry out such a quantum backaction measurement using a large 0.5 mm diameter silicon nitride membrane oscillator with 707 kHz frequency, via a microwave cavity readout. The measurement shows that quantum backaction noise can be evaded in the quadrature measurement of the motion of a large object.
The galaxy power spectrum on the lightcone: deep, wide-angle redshift surveys and the turnover scale
Authors: Pryer Dan , Smith Robert E. , Booth Robin , Blake Chris , Eggemeier Alexander , Loveday Jon 
Published: August 2022

Abstract
We derive expressions for the survey-window convolved galaxy power
spectrum in real space for a full sky and deep redshift survey, but
taking into account the geometrical lightcone effect. We investigate
the impact of using the standard mean redshift approximation as a
function of survey depth, and show that this assumption can lead to
both an overall amplitude suppression and scale-dependent error when
compared to the 'true' spectrum. However, we also show that by using a
carefully chosen 'effective fixed-time', one can find a range of
scales where the approximation to the full model is highly accurate,
but only on a more restricted set of scales. We validate the theory by
constructing dark matter and galaxy lightcone mock surveys from a
large N-body simulation with a high cadence of snapshots. We do this
by solving the light cone equation exactly for every particle, where
the particle worldlines are obtained in a piecewise fashion with cubic
interpolation between neighbouring snapshots. We find excellent
agreement between our measurements and the theory (∼ ±5%)
over scales (0.004 h Mpc-1 ≤ k ≤ 0.54 h Mpc-1) and for a variety of
magnitude limits. Finally, we look to see how accurately we can measure the
turnover scale of the galaxy power spectrum k
0. Using the lightcone
mocks we show that one can detect the turnover scale with a
probability P ≥ 95% in an all-sky catalogue limited to an
apparent magnitude m
lim ∼ 21. We also show that the
detection significance would remain high for surveys with m
lim ∼ 22 and 20% sky coverage.
Gravitational production of dark photon dark matter with mass generated by the Higgs mechanism
Authors: Sato Takanori , Takahashi Fuminobu , Yamada Masaki 
Published: August 2022

Abstract
We study the gravitational production of dark photon dark matter during inflation, when dark photons acquire mass by the Higgs mechanism. In the previous study, it was assumed that the dark photon has a Stückelberg mass, or a mass generated by the Higgs mechanism with a sufficiently heavy Higgs boson. In this paper we consider a case in which the Higgs boson is not fully decoupled; the Higgs field changes its vacuum expectation value after inflation. Then, the dark photon mass also changes with time after inflation, and the time evolution of the longitudinal mode is different from the case with a Stückelberg mass. Consequently, the spectrum of the dark photon energy density can have two peaks at an intermediate scale and a small scale. We show that the dark photon can explain the dark matter if its current mass is larger than 6 μeV × (HI
/1014 GeV)-4 and smaller than 0.8 GeV × (HI
/1014 GeV)-3/2, with HI
being the Hubble parameter during inflation. A higher mass is required if one considers a larger gauge coupling constant. The result for the Stückelberg mass can be reproduced in the limit of a small gauge coupling constant. We also comment on the constraints set by various conjectures in quantum gravity theory.
Stabilization of spatiotemporal dissipative solitons in multimode fiber lasers by external phase modulation
Authors: Kalashnikov V L , Wabnitz S 
Published: August 2022

Abstract
In this work, we introduce a method for the stabilization of spatiotemporal (ST) solitons. These solitons correspond to light bullets in multimode optical fiber lasers, energy-scalable waveguide oscillators and amplifiers, localized coherent patterns in Bose–Einstein condensates, etc. We show that a three-dimensional confinement potential, formed by a spatial transverse (radial) parabolic graded refractive index and dissipation profile, in combination with quadratic temporal phase modulation, may permit the generation of stable ST dissipative solitons. This corresponds to combining phase mode-locking with the distributed Kerr-lens mode-locking. Our study of the soliton characteristics and stability is based on analytical and numerical solutions of the generalized dissipative Gross–Pitaevskii equation. This approach could lead to higher energy (or condensate mass) harvesting in coherent spatio-temporal beam structures formed in multimode fiber lasers, waveguide oscillators, and weakly-dissipative Bose–Einstein condensates.
The Determination of Reward Function in AGV Motion Control Based on DQN
Authors: Chen Yubin , Li Dancheng , Zhong Huagang , Zhu Ouwen , Zhao Ziqi 
Published: August 2022

Abstract
Motion control is a very important part in the field of AGV(Automated Guided Vehicle). A good motion control method can make the movement of AGV more stable. Network models of reinforcement learning is one of the methods to solve the problem of AGV in motion control. This paper introduces the Markov Decision Process and the role of reward function. Besides, it studies and analyzes several classic reinforcement learning cases. DQN(Deep Q-Learning Network) which belongs to deep reinforcement learning network model is adopted. We set up several sets of comparative experiments with different reward functions by using sparse reward setting method, formalized reward setting method and reward coefficient variation reward setting method. Also we adjust the time of training. Through comparison, a reward function suitable for solving the problem of AGV motion control is obtained. In the field of AGV motion control, reinforcement learning model can converge faster and make more correct decisions. The reward function is verified in the simulation environment built by ROS(Robot Operating System).
Research and Analysis of Small Current Grounding Line Selection System
Authors: Xinzheng Jiang , Nan Jiang 
Published: August 2022

Abstract
In the small current grounding system, because the short-circuit fault of single-phase grounding accounts for more than 80% of the total short-circuit fault, the selection of single-phase grounding fault line is still the main problem in electrical engineering. This paper studies the principles, advantages and disadvantages of various line selection technical methods in case of single-phase grounding fault, and puts forward the improved method of comprehensive line selection for the problem of misjudgment of fault line selection. On this basis, it puts forward the improved method of comprehensive line selection, verifies the line selection device of 10kV transmission line through the relevant data obtained from design calculation and simulation experiment, and puts forward a more reasonable design scheme for the hardware circuit and software circuit of the line selection device, The fault tolerance and accuracy of small current grounding line selection system are improved.
Negative Damping Mechanism Analysis of Power System Stabilizer Based on Damping Torque
Authors: Zhu Xueqin , Yang Yiqiang , Fu Jiangtao , Bai Wenrui , Su Xiaolin 
Published: August 2022

Abstract
Power system stabilizer plays an important role in suppressing the low frequency oscillations, but a PSS with poorly tuned parameters may produce negative damping and aggravate the system oscillation. The purpose of this paper is to study the mechanism of damping of a PSS in multi machine system and to analyze whether the PSS has produced negative damping. This paper adopts Park model for analysis. According to the concepts of complex frequency and generalized phasor, the correlation between the damping torque phasor and the real part of the complex eigenvalue is studied. With the auxiliary of Park equivalent circuits, the damping torque provided by the excitation system is separated from the electrical torque phasor. Then, the damping torque coefficient of the PSS is defined as an indicator of the damp effect of the stabilizer. Finally, the simulation results of single machine infinite bus system and 4-machine system demonstrate the validation of the proposed method for evaluating the damping effect of PSS on the system.