bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adaptive dual model predictive control for linear systems with parametric uncertainties
Authors: Lin Mengting , Ning Zhaoke , Li Bin , Zhang Kai 
Published: April 2022

AbstractAdaptive dual model predictive control (DMPC) for linear systems with constant parametric uncertainties is investigated in this paper. In particular, chance constraints on output and input are considered. The online set‐membership identification and recursive least squares are utilized for shrinking the uncertain parameter set and getting the estimation point of the parameters. The dual effect represented by the parameters' prediction error is considered in the receding horizon optimization problem for easing the impact of the uncertainties and improving the performance simultaneously. Chance constraints on output are tackled by converting into convex alternatives. The output tracking problem is transformed into a quadratically constrained quadratic‐programming (QCQP) problem, which is computationally tractable. A numerical example is provided to illustrate the effectiveness of the proposed method.
Erste Erfahrungen mit einem neuen Radiofrequenzsystem zur endovenösen Perforanstherapie
Authors: Eisele Robert M. , Kirsch Ulrike 
Published: April 2022

Zusammenfassung
Einführung Die Behandlung der Perforantenvarikose (PV) gehört zu den großen Herausforderungen in der Phlebologie – nicht nur aufgrund der Vergesellschaftung mit chronischen Ulzera crurium und der Rezidivrate. Endovenöse Verfahren der Perforantenablation (EPA) unterliegen technischen Schwierigkeiten. Wir berichten von einer ersten Serie der EPA mit einem neuartigen Radiowellensystem.
Material, Patienten und Methoden Ausschließlich isolierte PV wurden in die Studie aufgenommen. Zur Diagnosestellung wurden dopplersonografische Untersuchungen (DU) durchgeführt. Die ultraschallgeführte EPA erfolgt unter sterilen Kautelen in der ambulanten Operationsabteilung. Postinterventionelle DU wurden nach einem Tag und 14 Tagen, 5 Wochen sowie 3, 6 und 12 Monaten terminiert. Im Falle einer Rekanalisierung wurde eine Schaumsklerosierung angestrebt.
Ergebnisse Neun PV wurden behandelt. Der durchschnittliche Energieeintrag betrug 969J. Nach einem medianen Nachuntersuchungszeitraum von 257 Tagen betrug die primäre Verschlussrate 75%, die sekundäre nach Schaumsklerosierung 89%. Die minimale Komplikationsrate trug zu einer hohen Patientenakzeptanz bei.
Schlussfolgerung Die EPA zur Behandlung der PV mit dem neuen Radiowellensystem hat sich als wirksam und verträglich bewährt. Weiteren Untersuchungen wird es vorbehalten sein, die endgültige Rolle der EPA in der Behandlung von PV zu definieren.
Schulung zur Selbstpunktion durch das Dialysepflegepersonal in einer Klinikdialyse
Authors: Matz Barbara 
Published: April 2022

ZUSAMMENFASSUNGIm Verlauf der letzten 5 Jahre fiel an den Kliniken Sindelfingen auf, dass teilstationäre Dialysepatienten mit einem Shunt nicht zur Selbstpunktion angeleitet wurden. Da die Selbstpunktion einige Vorteile bietet, wurde deshalb im Rahmen eines Forschungsprojekts untersucht, welche Faktoren die Pflegekräfte von einer Schulung zur Selbstpunktion abhalten. Vermutet wurde Zeitmangel oder fehlende Motivation der Pflegekräfte aufgrund des hektischen Dialysealltags. Um hemmende Faktoren eindeutig zu identifizieren, wurde in der Klinikdialyse Sindelfingen des Klinikverbunds Südwest (KVSW) eine Befragung des Pflegepersonals durchgeführt. In dieser Einrichtung werden derzeit weder Schulungen zur Selbstpunktion von teilstationären Dialysepatienten abgehalten, noch wird die Möglichkeit dazu gegeben. Ärzte und Patienten wurden in die Befragung nicht miteinbezogen. Die Ergebnisse werden in diesem Beitrag, der auf einer Facharbeit basiert, vorgestellt und beschrieben.
Wenn Hilflosigkeit in Wut und Wut in Gewalt
umschlägt
Authors: Singer Dominique 
Published: April 2022

Liebe Leserinnen und Leser,wohl allen im Kreißsaal Tätigen ist der Effekt bekannt: Aus
neonatologischer Erfahrung ist es vor allem die Nachricht, dass ein Neugeborenes
wegen einer Anpassungsstörung „mitgenommen“ werden muss, die
mitunter wütende Reaktionen hervorruft. Ursache hierfür ist
– einigermaßen offensichtlich – ein
Aversions-Aversions-Konflikt: Auf der einen Seite wollen sich die jungen Eltern das
ersehnte Geburtserlebnis nicht nehmen lassen. Auf der anderen Seite möchten
sie ihrem neugeborenen Kind keine notwendige Behandlung vorenthalten. Wird die so
empfundene Ausweglosigkeit als Quelle der Wut erkannt, lassen sich die Emotionen mit
etwas Feingefühl meist rasch wieder „einfangen“. Neu, und
neuerdings auch in den Medien präsent, ist der Umstand, dass derlei
Emotionen immer öfter in veritable Gewalt gegen Klinikpersonal umschlagen.
Das Phänomen ist vor allem im Rettungsdienst und in Notaufnahmen virulent,
also überall dort, wo – ähnlich wie beim elementaren
Geburtserlebnis – die Gefühle der Hilflosigkeit besonders
ausgeprägt sind. Es scheint aber, wie eine in dieser Ausgabe unserer
Zeitschrift nachzulesende Studie zu Gewalterfahrungen in Berliner
Kreißsälen aufzeigt, weitere Faktoren sowohl auf Seiten der
„Täter“ (Ungeduld, überzogene Erwartungshaltung,
sprachliche und kulturelle Verständigungsschwierigkeiten) als auch der
„Opfer“ (Organisationsmängel, Erschöpfung,
Unerfahrenheit) zu geben, die sich gewaltbegünstigend auswirken –
neben einer hochgradig irritierenden Absenkung der Aggressionsschwelle
gegenüber helfenden Berufen allgemein. Es ist wichtig, die
Grenzüberschreitung von der individualpsychologisch verständlichen
Reaktion zu der sozialpsychologisch bedenklichen Entwicklung zu benennen, um das
Phänomen aus der Tabuzone zu holen und die potenziell Betroffenen mit
präventiven Fertigkeiten auszustatten.
Angiotensin(1–7) Improves Islet Function in Diabetes Through
Reducing JNK/Caspase-3 Signaling
Authors: Liu Jing , Li Xing , Wang Xiaoyan , Peng Lina , Song Guoning , He Junhua 
Published: April 2022

AbstractThe aim of this study is to investigate whether Angiotensin (1–7), the
physiological antagonist of Angiotensin II (AngII), has antidiabetic activity
and the possible mechanism. Male Wistar rats were randomly divided into 3
groups: control group fed the normal diet, DM group fed high-fat diet and
injected with STZ, and Angiotensin (1–7) group receiving injection of
STZ followed by Angiotensin (1–7) treatment. Serum Ang II, fasting blood
glucose, insulin, HOMA-IR, and HOMA-beta were determined in control, diabetes
and Angiotensin (1–7) groups. The increased AngII and insulin resistance
in diabetes group were accompanied by changes in islet histopathology. However,
Angiotensin (1–7) improved the islet function and histopathology in
diabetes without affecting the level of AngII. Western blot confirmed that
Angiotensin (1–7) decreased the cleaved caspase 3 levels in pancreas of
DM. The increased expression of JNK, Bax, and Bcl2 genes under diabetic
conditions were partially reversed after Angiotensin (1–7)
administration in pancreas. Immunofluorescence analysis showed that p-JNK was
markedly increased in islet of DM rats, which was markedly alleviated after
Angiotensin (1–7) treatment. Furthermore, Angiotensin (1–7)
reversed high glucose(HG) induced mitochondrial apoptosis augments. Finally,
Angiotensin (1–7) attenuated the apoptosis of INS-1 cells through
reducing JNK activation in diabetes, which was blocked by anisomycin (a potent
agonist of JNK). Our findings provide supporting evidence that Angiotensin
(1–7) improved the islet beta-cells apoptosis by JNK-mediated
mitochondrial dysfunction, which might be a novel target for the treatment and
prevention of beta-cells dysfunction in DM.
Metal-Free Synthesis of 1,3-Dioxane Derivatives from Aromatic Alkynes and Paraformaldehyde
Authors: Ding Man-Hua , Zeng Fei , Hu Xin 
Published: April 2022

AbstractHere we report the efficient synthesis of a series of 1,3-dioxane derivatives from aromatic alkynes, paraformaldehyde, and a Lewis acid catalyzed reaction at room temperature. This reaction is metal-free and atom-economic. Single crystals of two typical 1,3-dioxane derivatives are obtained. A mechanism that the reaction proceeds through a six- or eight-membered ring intermediate is proposed.
Sudden Hearing Loss and Autoimmune Inner Ear Disease
Authors: Campbell Kathleen C. M. , Klemens James J. 
Published: April 2022

AbstractThis case report describes the audiologic and medical diagnostic evaluations, results, and treatment options in a patient with a classic presentation of immune-mediated sensorineural hearing loss, commonly called autoimmune inner ear disease (AIED). It reviews findings of the basic battery, immittance audiometry, transient otoacoustic emissions, and auditory brainstem response measures and medical findings over more than 2 years. AIED generally causes asymmetric bilateral sensorineural hearing loss with atypical configuration. Although hearing loss is generally fluctuant, the overall pattern is usually rapid progression, particularly in the absence of early medical intervention. Word recognition is usually disproportionately poor. In our case, otoacoustic emissions and auditory brainstem responses suggest both cochlear and retrocochlear involvement and may initially appear to be inconsistent with pure-tone thresholds. Audiologists must be familiar with AIED because early identification is critical. Additionally, an immunologic basis may be a factor in other disorders, including many cases of Meniere's disease.
Abbreviations: AIED = autoimmune inner ear disease, FTA/ABS = fluorescent treponemal antibody/absorption, MLR = middle latency response, MRI = magnetic resonance imaging, TOAEs = transient otoacoustic emissions
Expectations About Hearing Aids and Their Relationship to Fitting Outcome
Authors: Cox Robyn M. , Alexander Genevieve C. 
Published: April 2022

AbstractClinicians are often concerned that unrealistic prefitting expectations can have a negative impact on fitting success for new hearing aid wearers. To investigate this concern and to explore the potential value of measuring expectations, we developed the Expected Consequences of Hearing aid Ownership (ECHO) questionnaire as a companion to the Satisfaction with Amplification in Daily Life questionnaire. Four experiments were conducted to (1) determine realistic expectations for hearing aids, (2) evaluate expectations of new users, (3) measure reliability of prefitting expectations, and (4) assess relationships between prefitting expectations and postfitting satisfaction. Novice hearing aid users were found to have stable prefitting expectations about hearing aids, and these expectations were unrealistically high for the typical individual. There were many different expectation patterns across subjects. Of the four subscales of the ECHO, only one was predictive of the corresponding satisfaction data. Potential clinical applications are described.
Abbreviations: ECHO = Expected Consequences of Hearing aid Ownership, SADL = Satisfaction with Amplification in Daily Life, 3FAHL = better-ear three-frequency (500–2000 Hz) pure-tone average hearing loss
Fabrication of P(100) silicon macro-pore and pillar array by wet electrochemical etching
Authors: Li Xin , Shao Mengfan , Wang Hao , Tang Qian , Ren Ding 
Published: April 2022

Abstract
In this paper, pyramidal notch array was pre-etched on P(100) silicon wafer using anisotropic wet chemical etching, then macro-pore/pillar array were successfully processed in the pyramidal notch array by an anodic electrochemical etching. The formation mechanism of macro-pore and pillar in pyramidal notch were investigated, it indicates that the silicon dissolution rate is proportional to electric field, while electric field is mainly concentrated on the tip, edges and corners of the pyramidal notch. Therefore, there is an etching rate difference between the notch corner and planar regions in the pyramid notch. The notch corners are preferentially etched at first, then a pore is formed in the notch. If the shape of the open window is truncated and the bottom size is large enough, four pores would initiate at the notch angels due to etching rate difference between the truncated pyramidal notch corner and notch center, consequently, a pillar is formed in the notch center.
β-Ga2O3 nanowires: controlled growth, characterization, and deep-ultraviolet photodetection application
Authors: Ruan Wei , Wu Zhengyuan , Liu Jian , Chen Jing , Shan Yabing , Song Pengyu , Jiang Zhuoxun , Liu Ran , Zhang Guoqi , Fang Zhilai 
Published: April 2022

Abstract
We investigate the growth of (

2
ˉ

01

) β-Ga2O3 nanowires with a GaN seed crystal in detail. Growth of (

2
ˉ

01

) β-Ga2O3 nanowires starts with the formation of (001) Ga(II)–O chains of octahedral Ga2O6 structures, indicating the initial formation of (

2
ˉ

01

) and (001) atomic facets of β-Ga2O3 nanowires. Subsequent growth of Ga2O3 leads to the formation of (100) Ga(I)–O chains and energetically stable (100) and (010) sidewalls and octahedral Ga2O6 structures in the β-Ga2O3 nanowires. Energetically stable tetrahedral GaO4 structures are eventually formed in the β-Ga2O3 nanowires. High-quality N-doped (

2
ˉ

01

) β-Ga2O3 nanowires are synthesized and growth kinetics is clarified. The β-Ga2O3 nanowires deep-ultraviolet photodetectors show superior performance with high photoresponsivity (3.5 × 103 A W−1) and detectivity (9.6 × 1015 Jones) at −10 V bias.
Ultrananoporous supercapacitor with ionic liquid comprised of two-site cation: an Ising model study (II)
Authors: Zhou Shiqi , Zhou Run 
Published: April 2022

Abstract
A four-state one-dimension discrete spin model with the nearest neighbor and partial next nearest neighbor lattice interactions is proposed for describing electrical double layer formed by ionic liquid in cylindrical pore that can accommodate only one row of particles. The model, in which cation is modeled as a dimer formed by two hard spheres (HSs): one is positively charged with diameter

d
+

, while the other is neutral with diameter

d

+
0

, and anion is modeled by charged HS with diameter

d
−

, is designed to investigate effects of pore diameter

d

c
y
l
i
n

, ion transfer free energy, ion size and electrical valence on behaviors of specific differential capacitance

C
d

and specific energy storage

E

and its saturation value

E

s
a
t

. Relevant Kramers–Wannier transfer matrix is

16
×
16

, which gives system partition function by numerically solving maximum real root of the relevant characteristic equation. Main findings are briefly described below. (i) The ion valence has little effect on the

E

s
a
t

value, but does reduce the threshold voltage strength

U

s
a
t

, beyond which the energy storage reaches

E

s
a
t

. However, the ion valence (whether co- or counter-ion) raises both the

E

s
a
t

and

U

s
a
t

values as the relevant ion size decreases enough. (ii) Decreasing of the

d

c
y
l
i
n

value weakly reduces the

U

s
a
t

value, but raises the

C
d

peak height and the

E

s
a
t

value obviously; correlation between the

d

c
y
l
i
n

value and

E

s
a
t

value becomes stronger with the ions getting more pore hostile. (iii) With the counter-ion or co-ion charged site size decreasing, both the

E

s
a
t

value and

U

s
a
t

value rise. However, the effect of the co-ion charged site size is weakened as the co-ion gets more pore hostile, and the cation neutral site size influences on the

E

s
a
t

value less than the cation charged site size does. (iv) Pore friendly co-ion or pore hostile counter-ion always helps in raising the

E

s
a
t

value; the two have significant synergistic effect with the co-ion pore friendliness playing more important role than the counter-ion pore hostility.
Room temperature Szilard cycle and entropy exchange at the Landauer limit in a dopant atom double quantum dot silicon transistor
Authors: Durrani Zahid , Abualnaja Faris , Jones Mervyn 
Published: April 2022

Abstract
Room-temperature (RT) thermodynamics of a dopant-atom double quantum dot (DQD) silicon transistor are extracted using measurements of the dual gate charge stability diagram. Current traces corresponding to electron exchange in the Szilard one-electron gas ‘Maxwell Demon’ thermodynamic cycle are determined. Theoretical analysis, based on energy state shifts within the generalised DQD charge stability diagram, is used to map the Szilard cycle entropy exchange to the stability diagram. The restriction on the inter-QD coupling energy E
m > kT, necessary to observe DQD operation, is inherently seen to satisfy the Landauer limit, kTln2, for the minimum energy consumption per cycle for 1 bit. Associated entropy flows are extracted and simulated using single-electron Monte Carlo equivalent circuit simulations, from 4.2 to 290 K. An entropy valley, tending to the Szilard limit minimum of −kln2,

occurs at degeneracy between neighbouring electron states, with traces persisting to RT. Changes in gate cycle trajectory, device capacitance, and temperature are characterised to establish conditions for RT operation.
Superconductivity from repulsion in the doped 2D electronic Hubbard model: an entanglement perspective
Authors: Mukherjee Anirban , Lal Siddhartha 
Published: April 2022

Abstract
We employ the momentum space entanglement renormalization group (MERG) scheme developed in references (Mukherjee et al 2021 J. High Energy Phys. JHEP04(2021)148; Patra and Lal 2021 Phys. Rev. B 104 144514) for the study of various insulating, superconducting and normal phases of the doped and the undoped 2D Hubbard model on a square lattice found recently by us (Mukherjee and Lal 2020 New J. Phys.
22 063007; Mukherjee and Lal 2020 New J. Phys.
22 063008). At each MERG step, disentanglement of particular degrees of freedom, transforms the tensor network representation of the many-particle states. The MERG reveals distinct holographic entanglement features for the normal metallic, topologically ordered insulating quantum liquid and Neél antiferromagnetic symmetry-broken ground states of the 2D Hubbard model at half-filling, clarifying the essence of the entanglement phase transitions that separates the three phases. An MERG analysis of the quantum critical point of the hole-doped 2D Hubbard model reveals the evolution of the many-particle entanglement of the quantum liquid ground state with hole-doping, as well as how the collapse of Mottness is concomitant with the emergence of d-wave superconductivity.
Rolling bearing fault feature extraction via improved SSD and a singular-value energy autocorrelation coefficient spectrum
Authors: Xu Weiyang , Shen Yehu , Jiang Quansheng , Zhu Qixin , Xu Fengyu 
Published: April 2022

Abstract
It is usually difficult to extract weak fault features from rolling bearing vibration signals under noise pollution. To address this problem, a fault feature extraction approach for rolling bearings using improved singular spectrum decomposition (SSD) and a singular-value energy autocorrelation coefficient spectrum (SVEACS) is proposed. Firstly, to facilitate the determination of the optimal modal parameters in the SSD algorithm, the number of SSD layers is adaptively determined using an improved SSD algorithm based on permutation entropy. Then, the optimal modal components are selected, and the proposed SVEACS is used to determine the order of singular-value noise reduction. Finally, envelope analysis is used to extract the accurate shock characteristics of the denoised signal. The results of the experiments on simulated and real signals indicate that the proposed method can effectively extract the weak characteristics of the vibration signal under strong noise, and accurately diagnose the fault of a rolling bearing.
Application of artificial landmark in sonar detection
Authors: Li Jianda , Tang Zhijie , Wang Zhanhua , Huang Jingke , Wang Chi 
Published: April 2022

Abstract
Sonar is an important means of underwater target detection. However, the existing sonar measurement method does not use a third-party object as a reference, which makes it difficult to measure underwater targets. In this paper, we propose an angle measurement method and a 3D mapping algorithm based on sonar images and artificial landmarks. By combining acoustic and visual methods, using the known size information of artificial landmarks as a reference, we can calculate the target information to realize the mapping between real space and sonar images. Before verifying the feasibility, we processed the sonar image, denoised it with a median filter, enhanced the landmark image with the Sauvola algorithm, and finally introduced two data fitting methods to extract the edge information of artificial landmarks, so as to help us find the key points more accurately. The experimental results show that the accuracy of our method can reach the millimeter level, and the error range is within 5%. The technology proposed in this paper realizes the shape correction and precise length measurement of underwater targets.
Molecular dynamics simulation of nanofilament breakage in neuromorphic nanoparticle networks
Authors: Wu Wenkai , Pavloudis Theodoros , Verkhovtsev Alexey V , Solov’yov Andrey V , Palmer Richard E 
Published: April 2022

Abstract
Neuromorphic computing systems may be the future of computing and cluster-based networks are a promising architecture for the realization of these systems. The creation and dissolution of synapses between the clusters are of great importance for their function. In this work, we model the thermal breakage of a gold nanofilament located between two gold nanoparticles via molecular dynamics simulations to study on the mechanisms of neuromorphic nanoparticle-based devices. We employ simulations of Au nanowires of different lengths (20–80 Å), widths (4–8 Å) and shapes connecting two Au1415 nanoparticles (NPs) and monitor the evolution of the system via a detailed structural identification analysis. We found that atoms of the nanofilament gradually aggregate towards the clusters, causing the middle of wire to gradually thin and then break. Most of the system remains crystalline during this process but the center is molten. The terminal NPs increase the melting point of the NWs by fixing the middle wire and act as recrystallization areas. We report a strong dependence on the width of the NWs, but also their length and structure. These results may serve as guidelines for the realization of cluster-based neuromorphic computing systems.
Spectroscopic study of the 4f
n−15d transitions of LaPO4 doped with Pr3+ or co-doped with Pr3+ and Gd3+ in the vacuum ultra violet region
Authors: Hilario Eloísa G , Rodrigues Lucas C V , Caiut José Maurício A 
Published: April 2022

Abstract
The energy of f-d transitions depends on the crystalline field in which the lanthanide ion is inserted. Depending on the experimental setup, these transitions could occur at high energy, so several studies regarding theoretical data have been conducted. Here, we present the experimental determination of the energy of interconfigurational 4f

n
→ 4f

n−15d (f-d) transitions from Pr3+ ions to the lanthanum orthophosphate LaPO4 matrix; we have also determined the bandgap value for this host. The experiments were carried out at the Synchrotron setup of the Brazilian LNLS laboratory. Specifically, we synthesized LaPO4:Pr3+ and LaPO4:Pr3+/Gd3+ by the hydrothermal method under different pH conditions or by spray pyrolysis. The particles resulting from hydrothermal synthesis had different morphologies and the influence of pH value was showed: the reaction medium was controlled along the process, which changed the surface potential. On the basis of Raman spectroscopy and x-ray diffraction analyses, we found that the crystalline phase was monoclinic monazite for all the samples. We studied the 4f5d level and bandgap transitions at high energy by absorption analysis in the VUV range. The experimental results were 7.5 eV (LaPO4 bandgap) and 5 eV (4f

n
→ 4f

n−15d transition of the Pr3+ ion), which were close to the theoretical values reported in the literature for this ion and this matrix.