bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Underwater Image Conversion Algorithm Based on Light Refraction Model
Authors: Chen Xuyang , He Yuyao , Zong Ruiliang , Li Baoqi , Zhao Yaohua
Published: September 2019

Aiming at the problem of image distortion caused by light refraction during underwater imaging, and the conversion error caused by existing image conversion algorithms due to neglecting the secondary refraction of light, an underwater image conversion algorithm based on the light refraction model is proposed in this paper. The algorithm firstly obtains the pixel information of the underwater image, then calculates the corresponding coordinate information of the pixel points in the equivalent air image through the mapping relationship, and finally obtains the equivalent air image through image interpolation. Experimental results shows, compared with the existing image conversion algorithms, the proposed algorithm reduces the average error ofudirection from 2.289 5 to 1.213 3, which is a decrease of 47.01%. The average error ofvdirection is reduced from 3.252 5 to 1.526 3, which is a decrease of 53.07%. At the same time, the mean value of ranging error was reduced from 58.83 mm to 28.88 mm, a decrease of 50.91%。
Research on Cooperative Output Regulation Problem of Multi-Agent Systems with Time-Varying Delay under Dynamic Topology
Authors: Liu Zili , Yan Weisheng , Zhang Shouxu
Published: September 2019

The random data loss that occurs during the communication process of multi-agent systems will lead to the dynamic switching of network topology. The time-varying communication delay will cause the agents to update their control inputs irregularly and asynchronously. In this paper, we deal with the cooperative output regulation problem of multi-agent systems with both random data loss and time-varying communication delay. By applying a queuing mechanism, the multi-agent systems with time-varying communication delay can be modeled as the multi-agent systems with constant communication delay and stochastic packet dropout. Based on the queuing mechanism, we designed the distributed state observers of the leader and the followers. Then, a new distributed measurement output feedback control algorithm is proposed. Under some standard assumptions, the proposed algorithm can solve the cooperative output regulation problem of multi-agent systems with both stochastic packet dropout and time-varying communication delay for unstable or stable exosystem. Then, the corresponding conditions for solving the cooperative output regulation problem are given, respectively. The simulation results show that the measurement output feedback control algorithm based on queue mechanism can effectively solve the cooperative output regulation problem of multi agent systems with time-varying delay under dynamic network topology.
Product Blind Area Assembly Method Based on Augmented Reality and Machine Vision
Authors: Wang Zenglei , Yan Yuxiang , Han Dechuan , Bai Xiaoliang , Zhang Shusheng
Published: September 2019

In the manual assembly of the blind area, the worker's line of sight is blocked, and the real-time state of the parts to be assembled cannot be seen, which has a great impact on the efficiency and accuracy of the assembly. Aiming at this problem, a blind zone assembly method based on machine vision and augmented reality(AR) is proposed. Firstly, the ellipse is used as the marker point. The object to be assembled in the blind area is indirectly tracked by the detection and positioning of the ellipse, and the AR visualization guide assembly is then performed by projection and the assembly is precisely guided using the principle of local error amplification. Finally, the blind zone assembly experiment based on machine vision and augmented reality is designed to verify the effectiveness of the method. The experimental results show that this method can significantly improve the efficiency of assembly work in blind areas and can effectively reduce the assembly error rate.
Design of Control Law of Post Stall Maneuver under Unsteady Aerodynamics Based on Improved Dynamic Inverse Method
Authors: Lyu Yongxi , Zhang Weiguo , Shi Jingping , Qu Xiaobo , Chen Huakun
Published: September 2019

In this paper, a practical improved dynamic inverse control method is proposed to solve the large control error and control hysteresis of post stall maneuver under unsteady aerodynamics. Firstly, depending on the wind tunnel experimental data of the advanced fighter aircraft model under biaxial coupled large oscillation, an accurate unsteady aerodynamic model is established by using the improved extreme learning machine (ELM) method. Secondly, in terms of the time scale separation, the control error caused by unsteady aerodynamic is reduced by adding integral in the fast loop, and the control delay caused by unsteady aerodynamic is eliminated by applying the lag correction link in the slower loop. The deflections of conventional aerodynamic surface and thrust vector are allocated by the daisy chain method. Finally, the formula of the reduced frequency, which is the key factor in the unsteady aerodynamic modelling process, is derived by analyzing the wind tunnel data. The effectiveness of the present method for the scaled model is verified by herbst post stall maneuver. The present work provides a practical and reliable way for the flight test of post stall maneuver.
Study on Pressure Coefficient in Process of Double Slot Nozzle Jet Impingement on Sinusoidal Colliding Strip
Authors: Liang Bo , Hou Shuai , Bai Meijuan , Liu Jianhui , Geng Hua , Liu Jitong
Published: September 2019

Air cushion furnace is widely used in the heat treatment process of aluminum strip, copper strip and silicon steel, and the double slot nozzle is the core part of the air cushion furnace device. Studying the distribution characteristics of the surface pressure coefficient of the strip during the suspension process could provide important theoretical references for the high-efficiency and high-value production of the air-cushion furnace. In this paper, the distribution of pressure coefficients is studied under the conditions of Re=48 194~12 048, high H/D=1~3, spacing L/D=17.2 and sinusoidal amplitude A=0~30 mm. The results show that with the decrease of L/D, the position of the main stop point moves to the center line of the nozzle, and the value of the second stop point increases gradually, and with the increase of the sinusoidal amplitude A, the position of the main stop point moves gradually to x/D=0. The pressure coefficient Cp decreases with the increase of sinusoidal amplitude A, the pressure coefficient Cp decreases with the increase of H/D, and the difference between the pressure coefficient at the stationary point of the double-slot nozzle and the pressure coefficient at the non-stationary point increases with the increase of H/D. This study provides an important theoretical basis for the design of double slot nozzles in air cushion furnace.
Study on Active Heat Dissipation Performance of Cellular Sandwich Materials with Variable Thickness of Cell Wall
Authors: Dong Hao , Du Lin , Zhang Kai , Cui Di , Deng Zichen
Published: September 2019

The influence of the thickness variation of the cell wall on the active heat dissipation of the cellular sandwich was studied by deducing the thermal performance index of the cellular sandwich with variable thickness. The relationship between the relative density and the thermal performance index of the cellular sandwich with different cell structures was analyzed. Then, the maximum thermal performance index and the optimum relative density of the cellular sandwich with different cell structures were obtained. The relationship between the maximum thermal performance index and the optimal relative density and the variable thickness parameter was given by using linear fitting. The influence of the thickness of cell wall thickness on the optimal relative density and maximum thermal performance index of different cell structures was analyzed. It was concluded that the change in cell wall thickness has the slight effect on the hexagon, and the effect on the triangle and square is big.
Holocephalocotyle monstrosaen. gen. n. sp. (Monogenea, Monocotylidae) from the olfactory rosette of the rabbit fish,Chimaera monstrosa(Holocephali, Chimaeridae) in deep waters off Algeria
Authors: Derouiche Imane , Neifar Lassad , Gey Delphine , Justine Jean-Lou , Tazerouti Fadila
Published: September 2019

Based on a molecular and morphological study, a new monocotylid genus,Holocephalocotylen. gen. is proposed to accommodateHolocephalocotyle monstrosaen. sp., found on the olfactory rosette of the rabbit fish,Chimaera monstrosaLinnaeus (Chondrichthyes, Chimaeridae), from the Mediterranean Sea off Algeria. Identification of fish hosts was confirmed by molecular barcoding of the COI gene. A partial 28S rDNA sequence (D1–D2 domain) ofHolocephalocotyle monstrosaewas obtained; it was distinct from all known monocotylid sequences (p-distance: 15.5–23%). A phylogenetic tree constructed from available monocotylid sequences showed thatHolocephalocotyle monstrosaewas included, and basal, in a robust group including species ofMerizocotyle, MycteronastesandEmpruthotrema, confirming that the species is a member of the Merizocotylinae. The new genus is unique among the Merizocotylinae in having a distinctive pattern of haptoral loculi with one central, five peripheral and seven “interperipheral loculi” partially inserted between peripheral loculi and a compartmentalised sclerotised male copulatory organ. The diagnosis of the Merizocotylinae is amended to include this new genus. The new genus represents the second monocotylid genus recorded from holocephalans.
Liebe Leserin, lieber Leser
Authors: Edlhaimb Hans-Peter
Published: September 2019

Auf sehr unterschiedliche Weise beleuchten die Beiträge in diesem Heft diverse Widerstandsphänomene in der Balintarbeit. Diese Widerstandsphänomene treten in der ursprünglichen Arzt-Patienten-Beziehung auf, bei der Darstellung durch den Referenten, in der Gruppenarbeit und in der Balintgruppenleitung.
Zum Umgang mit Widerstand in einer kontinuierlich arbeitenden Balintgruppe als „emotionaler Spielwiese“ – kritische Reflexionen nach über zwei Jahrzehnten
Authors: Zimmermann Wolfram
Published: September 2019

Gegenstand der vorliegenden Arbeit sind kritisch reflektierte Veränderungen des emotionalen Klimas in den letzten Jahren in der Leitung einer sehr kontinuierlich arbeitenden Balintgruppe in Bernau. Sie wird vom Autor seit mehr als 22 Jahren als anerkannter und zertifizierter Qualitätszirkel geleitet. Bis Ende 2017 wurde diese Balintgruppe in der eigenen Psychotherapie-Praxis des Autors durchgeführt. Nach der Beendigung dieser eigenen Praxistätigkeit wurde der Autor von der KV Brandenburg mit einer sehr persönlichen Anerkennung der bisherigen Leistungen gebeten, diese Balintgruppe in anderen Räumlichkeiten auch weiterhin zu führen. Dies konnte mit erfolgreichem Engagement in einer Internistischen Gemeinschaftspraxis seit Anfang 2018 realisiert werden. Der Autor stellte aber dabei in den letzten Jahren relevante Veränderungen im emotionalen Klima in dieser Gruppe fest. Diese immer sehr engagiert arbeitende Balintgruppe wurde von einer älteren Kollegin früher immer gern als sogenannte „emotionale Spielwiese“ erlebt . Hier wurde v. a. sehr viel innerer affektiver Erlebnisraum eröffnet, wurde unmittelbare Kommunikation von Gefühlen, von mannigfaltigen inneren Bildern und lebhaften Körperempfindungen realisiert. Genau aber dieser erlebte intensive emotionale Charakter hat sich in der letzten Zeit verändert, die „emotionale Spielwiese“ wird irgendwie weniger gestaltet. Dies wird am Beispiel von häufigeren rationalisierenden und diagnostischen Erklärungen bzw. Ratschlägen besonders einzelner Teilnehmerinnen und einer entsprechenden Fallvignette verdeutlicht. Zugleich werden Bemühungen des Leiters dieser Bernauer Balintgruppe aufgezeigt, diese „emotionale Spielwiese“ wieder verstärkt zu nutzen. Direkt angeregt wurde diese vorliegende Arbeit durch hoch interessante Überlegungen zum Umgang mit eventuell vergleichbaren „kritischen Ereignissen“ in einfachen psychsomatischen Gruppen vor Ort mit weniger vorgebildeten TeilnehmerInnen und einem dabei methodisch- vorgenommenen Vergleich von „Alten und Neuem“ [vgl. 6, 16ff.] sowie einer kritischen Analyse der Balintgruppenleitung anlässlich der Silser Studienwoche 2017 in der Schweiz [vgl. 7]
Cardiovascular Protective Effects of Centella asiatica and Its Triterpenes: A Review
Authors: Razali Nur Nadia Mohd , Ng Chin Theng , Fong Lai Yen
Published: September 2019

Centella asiatica, a triterpene-rich medicinal herb, is traditionally used to treat various types of diseases including neurological, dermatological, and metabolic diseases. A few articles have previously reviewed a broad range of pharmacological activities of C. asiatica, but none of these reviews focuses on the use of C. asiatica in cardiovascular diseases. This review aims to summarize recent findings on protective effects of C. asiatica and its active constituents (asiatic acid, asiaticoside, madecassic acid, and madecassoside) in cardiovascular diseases. In addition, their beneficial effects on conditions associated with cardiovascular diseases were also reviewed. Articles were retrieved from electronic databases such as PubMed and Google Scholar using keywords “Centella asiatica,” “asiatic acid,” “asiaticoside,” “madecassic acid,” and “madecassoside.” The articles published between 2004 and 2018 that are related to the aforementioned topics were selected. A few clinical studies published beyond this period were also included. The results showed that C. asiatica and its active compounds possess potential therapeutic effects in cardiovascular diseases and cardiovascular disease-related conditions, as evidenced by numerous in silico, in vitro, in vivo, and clinical studies. C. asiatica and its triterpenes have been reported to exhibit cardioprotective, anti-atherosclerotic, antihypertensive, antihyperlipidemic, antidiabetic, antioxidant, and anti-inflammatory activities. In conclusion, more clinical and pharmacokinetic studies are needed to support the use of C. asiatica and its triterpenes as therapeutic agents for cardiovascular diseases. Besides, elucidation of the molecular pathways modulated by C. asiatica and its active constituents will help to understand the mechanisms underlying the cardioprotective action of C. asiatica.
Transcalvarial and Transdural Involvement of Skull Actinomycosis with Recurrence
Authors: Harshith Kramadhari , Nagarajan Krishnan , Ramesh Andi Sadayandi , Gochhait Debasis
Published: September 2019

Actinomycosis is caused by anaerobic gram-positive bacteria of Actinomyces genus, generally found as commensals in the human body and infection occurs when the immune system is compromised. We present the case of a 35-year-old diabetic woman, who presented with headache and sudden onset of left-sided weakness apart from scalp swelling, which on imaging showed transcalvarial transdural involvement, and subsequent surgical debridement and histopathologic analysis confirmed actinomycosis. Follow-up showed recurrence of the lesion at the same site following a period of remission. Calvarial involvement of actinomycosis is rare and can mimic even neoplastic or malignant lesions, hence requiring prompt diagnosis, treatment with surgery, and long-term antibiotic treatment to prevent complications.
Cannabidiol Interacts Significantly with Everolimus—Report of a Patient with Tuberous Sclerosis Complex
Authors: Wiemer-Kruel Adelheid , Stiller Brigitte , Bast Thomas
Published: September 2019

A 6.5-year-old female patient with a TSC2 mutation had been given everolimus (EVE) for 3 years for pharmacoresistant focal epilepsy and for life-threatening, severe ventricular dysrhythmia. EVE had been started with daily dose of 0.15 mg/kg/day and was increased up to 0.6 mg/kg/day. Target blood trough levels of around 9 µg/L had been documented. Although EVE therapy revealed no effect on seizure activity, cardiac rhythm normalized completely. Thus, EVE was reduced to a dose of 0.3 mg/kg/day leading to stable blood trough levels of 4 to 5 µg/L. Due to refractory tonic seizures with a frequency of 1 to 4 per day, we initiated cannabidiol (CBD) treatment, raising it to a daily dose of 200 mg. After 6 weeks, the EVE blood trough levels rose to 12.0 µg/L. Although we halved the EVE dose, her EVE blood trough level continued increasing up to 16.0 µg/L.

The CBD dose was increased to 500 mg/day (20.4 g/kg/day), but EEG parameters and seizures failed to respond. Serum concentrations of EVE were unstable under the co-medication with CBD. Depending on the CBD dose, they varied between 1.7 and 12.3 µg/L, while EVE was always administered at the same dose.

Although never before reported, CBD and EVE appear to interact, due to the metabolic pathway through CYP 450 3A4. Although we detected no side effects in our patient, we strongly recommend drug monitoring using the combination of CBD with EVE to prevent harmful overdosing.
A Technique for 360-Degree Rigid Sternal Fixation with Sternal Plates and Wire Cerclage
Authors: James Taylor M. , Nores Marcos A. , Stamou Sotiris
Published: September 2019

Sternal instability after cardiac surgery can lead to poor bony healing, as well as deep sternal wound infections and mediastinitis. Rigid plate fixation is associated with greater stability and fewer complications compared with wire cerclage, however, rigid plate fixation alone lacks posterior stability of the sternum and may be less effective in morbidly obese or osteoporotic patients. This article describes a surgical technique of combined rigid plate fixation and wire cerclage that provides 360-degree stabilization for sternotomies in high-risk patients. We employed this technique in 40 patients with no incidence of deep sternal wound infection.
Classification of unitary vertex subalgebras and conformal subnets for rank-one lattice chiral CFT models
Authors: Carpi Sebastiano , Gaudio Tiziano , Hillier Robin
Published: September 2019

We provide a complete classification of unitary subalgebras of even rank-one lattice vertex operator algebras. As a consequence of the correspondence between vertex operator algebras and conformal nets, we also obtain a complete classification of conformal subnets of even rank-one lattice conformal nets.
Interfacial aggregation of Janus rods in binary polymer blends and their effect on phase separation
Authors: Paiva F. , Boromand A. , Maia J. , Secchi A. , Calado V. , Khani S.
Published: September 2019

Janus particles interfacially self-assemble into different structures when incorporated into multiphase systems. Dissipative particle dynamics simulations are employed herein to investigate the interplay between aggregation mechanisms and phase separation in polymer blends. Shorter rods with a standing configuration become increasingly “caged” or trapped in larger aggregates as weight fraction increases, which is reflected in the way that their diffusion is coupled to their aggregation rates. Janus rods of higher aspect ratios that are tilted at the interface aggregate side-by-side and are able to hinder phase separation kinetics. This is due to a combination of individual Janus rod conformations at the interface, their intrinsic aggregation mechanisms, aggregate fractal dimension, and aggregation rates, and can also be traced back to the scaling of the diffusion coefficient of aggregates with their size. Findings presented provide insight into the mechanisms governing two dimensionally growing colloidal aggregates at fluid interfaces, more specifically, those associated with Janus particles, and shed light on the potential of these systems in paving the way for designing new functional materials.
On a global Lagrangian construction for ordinary variational equations on 2-manifolds
Authors: Urban Zbyněk , Volná Jana
Published: September 2019

Locally variational systems of differential equations on smooth manifolds, having certain de Rham cohomology group trivial, automatically possess a global Lagrangian. This important result due to Takens is, however, of sheaf-theoretic nature. A new constructive method of finding a global Lagrangian for second-order ODEs on 2-manifolds is described on the basis of the solvability of the exactness equation for the Lepage 2-forms and the top-cohomology theorems. Examples from geometry and mechanics are discussed.
Existence and asymptotic behavior of positive blow up solutions for semilinear elliptic coupled system
Authors: Khamessi Bilel
Published: September 2019

In this article, we study the existence and the boundary behavior of positive blow-up solutions for the semilinear elliptic coupled system. Our arguments are based on the subsupersolution method and the Karamata regular variation theory.
Solvation effect on binding modes of model lignin dimer compounds on MWW 2D-zeolite
Authors: Jain Varsha , Wilson Woodrow N. , Rai Neeraj
Published: September 2019

Lignin as a potential renewable source of biofuels, chemicals, and other value-added products has gained much attention. However, the complexity of lignin structure poses a significant challenge for developing efficient valorization techniques. As most processes involve solvothermal conditions to minimize energy cost, lignin depolymerization is governed by reaction conditions (temperature and pressure) and solvents. In this work, binding of β–O–4 linkage consisting lignin dimers on MWW two-dimensional (2D) zeolite is investigated using periodic density functional theory. Furthermore, the effect of different terminated surfaces (H:OH% = 100:0; 50:50; 0:100%), different temperatures (323, 353, 373 K), and different solvents (water and methanol) on the binding modes is quantified. Our work shows that in the gas phase the binding strength increases 10–15 kcal/mol upon increasing the number of hydroxyl groups on the surface. Also, the phenolic dimer binds more strongly than the nonphenolic dimer, and the binding strength of model compounds increases in the presence of the solvent. Analysis of structural changes in the presence of the solvent reveals that the aromatic rings are parallel to the zeolite surface and primary interaction with zeolite is through the hydroxyl groups near the β–O–4 linkage. Furthermore, while the solvation energy decreases with increasing temperature, the opposite trend is observed for the binding energy with the surface.
On the calculation of quantum mechanical electron transfer rates
Authors: Lawrence Joseph E. , Fletcher Theo , Lindoy Lachlan P. , Manolopoulos David E.
Published: September 2019

We present a simple interpolation formula for the rate of an electron transfer reaction as a function of the electronic coupling strength. The formula only requires the calculation of Fermi golden rule and Born-Oppenheimer rates and so can be combined with any methods that are able to calculate these rates. We first demonstrate the accuracy of the formula by applying it to a one dimensional scattering problem for which the exact quantum mechanical, Fermi golden rule, and Born-Oppenheimer rates are readily calculated. We then describe how the formula can be combined with the Wolynes theory approximation to the golden rule rate, and the ring polymer molecular dynamics (RPMD) approximation to the Born-Oppenheimer rate, and used to capture the effects of nuclear tunneling, zero point energy, and solvent friction on condensed phase electron transfer reactions. Comparison with exact hierarchical equations of motion results for a demanding set of spin-boson models shows that the interpolation formula has an error comparable to that of RPMD rate theory in the adiabatic limit, and that of Wolynes theory in the nonadiabatic limit, and is therefore as accurate as any method could possibly be that attempts to generalize these methods to arbitrary electronic coupling strengths.
Symmetric and asymmetric coalescence of droplets on a solid surface in the inertia-dominated regime
Authors: Pawar Nilesh D. , Bahga Supreet Singh , Kale Sunil R. , Kondaraju Sasidhar
Published: September 2019

We present an investigation of symmetric and asymmetric coalescence of two droplets of equal and unequal size on a solid surface in the inertia-dominated regime. Asymmetric coalescence can result due to the coalescence of two unequal-sized droplets or coalescence of two droplets having different contact angles with the surface due to a step gradient in wettability. Based on the solution of an analytical model and lattice Boltzmann simulations, we analyze symmetric and asymmetric coalescence of two droplets on a solid surface. The analysis of coalescence of identical droplets show that the liquid bridge height grows with time as (t*)1/2 for θ = 90° and (t*)2/3 for θ < 90°, where t* is dimensionless time. Our analysis also yields the same scaling law for the coalescence of two unequal-sized droplets on a surface with homogeneous wettability. We also discuss the coalescence of two droplets having different contact angles with the surface due to a step gradient in wettability. We show that the prediction of bridge height with time scales as (t*)2/3 irrespective of contact angles of droplet with the surface.
Can clathrates heterogeneously nucleate ice?
Authors: Factorovich Matías H. , Naullage Pavithra M. , Molinero Valeria
Published: September 2019

Methane hydrates can be preserved at ambient pressure, beyond their region of thermodynamic stability, by storing them at temperatures from 240 to 270 K. The origin of this anomalous self-preservation is the formation of an ice coating that covers the clathrate particles and prevents further loss of gas. While there have been several studies on self-preservation, the question of what is the mechanism by which ice nucleates on the decomposing clathrate hydrates has not yet been fully explained. Here, we use molecular simulations, thermodynamic analysis, and nucleation theory to investigate possible scenarios for the nucleation of ice: heterogeneous nucleation at the clathrate/vapor or clathrate/liquid interfaces and homogeneous nucleation from supercooled water. Our results indicate that clathrates cannot heterogeneously nucleate ice and that ice nucleation is due to the cooling of water at the decomposing clathrate/liquid interface, which suffices to trigger homogeneous ice nucleation. We find that the (111) face of the sII structure clathrate can bind to the (111) plane of cubic ice or the basal plane of hexagonal ice through domain matching, resulting in a weak binding that—while insufficient to promote heterogeneous ice nucleation—suffices to produce epitaxy and alignment between these crystals. We use thermodynamic relations, theory, and the contact angles of ice at the (111) sII clathrate/liquid interface to determine—for the first time—the interfacial free energy of this most favorable ice-clathrate interface, 59 ± 5 mJ/m2. We discuss the implications of our results for the feasibility of heterogeneous nucleation of gas clathrates at ice/vapor interfaces.
Homogenized model with memory for two-phase compressible flow in double-porosity media
Authors: Panfilov Mikhail
Published: September 2019

A completely averaged model of two-phase flow of compressible fluids in a medium with double porosity is developed. The variational asymptotic two-scale averaging method with splitting the nonlocality and nonlinearity is presented. Several mechanisms of delay are detected, as the nonequilibrium capillary redistribution of phases, pressure field relaxation caused by the compressibility, and the cross effects of fluid extrusion from pores due to rock compaction and fluid expansion. A generalized nonequilibrium capillary equation is obtained. All characteristic times of delay are explicitly defined as functions of saturation.
Enhancing domain wall velocity through interface intermixing in W-CoFeB-MgO films with perpendicular anisotropy
Authors: Zhao Xiaoxuan , Zhang Boyu , Vernier Nicolas , Zhang Xueying , Sall Mamour , Xing Tao , Diez Liza Herrera , Hepburn Carolyna , Wang Lin , Durin Gianfranco , Casiraghi Arianna , Belmeguenai Mohamed , Roussigné Yves , Stashkevich Andrei , Chérif Salim Mourad , Langer Jürgen , Ocker Berthold , Jaiswal Samridh , Jakob Gerhard , Kläui Mathias , Zhao Weisheng , Ravelosona Dafiné
Published: September 2019

We study the influence of He+ irradiation induced interface intermixing on magnetic domain wall (DW) dynamics in W-CoFeB (0.6 nm)-MgO ultrathin films, which exhibit high perpendicular magnetic anisotropy and large Dzyaloshinskii-Moriya interaction (DMI) values. Whereas the pristine films exhibit strong DW pinning, we observe a large increase in the DW velocity in the creep regime upon He+ irradiation, which is attributed to the reduction of pinning centers induced by interface intermixing. Asymmetric in-plane field-driven domain expansion experiments show that the DMI value is slightly reduced upon irradiation, and a direct relationship between DMI and interface anisotropy is demonstrated. Our findings provide insights into the material design and interface control for DW dynamics, as well as for DMI, enabling the development of high-performance spintronic devices based on ultrathin magnetic layers.
On singularly perturbed systems of ODE with a multiple root of the degenerate equation
Authors: Butuzov V. F.
Published: September 2019

We consider a boundary-value problem for a system of two second-order ODE with distinct powers of a small parameter at the second derivative in the first and second equations. When one of the two equations of the degenerate system has a double root, the asymptotic behaviour of the boundary-layer solution of the boundary-value problem turns out to be qualitatively different from the known asymptotic behaviour in the case when those equations have simple roots. In particular, the scales of the boundary-layer variables and the very algorithm for constructing the boundary-layer series depend on the type of the boundary conditions for the unknown functions. We construct and justify asymptotic expansions of the boundary-layer solution for boundary conditions of a particular type. These expansions differ from those for other boundary conditions.
On a class of elliptic boundary-value problems with parameter and discontinuous non-linearity
Authors: Pavlenko V. N. , Potapov D. K.
Published: September 2019

We study an elliptic boundary-value problem in a bounded domain with inhomogeneous Dirichlet condition, discontinuous non-linearity and a positive parameter occurring as a factor in the non-linearity. The non-linearity is in the right-hand side of the equation. It is non-positive (resp. equal to zero) for negative (resp, non-negative) values of the phase variable. Letbe a solution of the boundary-value problem with zero right-hand side (the boundary function is assumed to be positive). Putting, we reduce the original problem to a problem with homogeneous boundary condition. The spectrum of the transformed problem consists of the values of the parameter for which this problem has a non-zero solution (the functionis a solution for all values of the parameter). Under certain additional restrictions we construct an iterative process converging to a minimal semiregular solution of the transformed problem for an appropriately chosen starting point. We prove that any non-empty spectrum of the boundary-value problem is a ray, where. As an application, we consider the Gol’dshtik mathematical model for separated flows of an incompressible fluid. We show that it satisfies the hypotheses of our theorem and has a non-empty spectrum.
Conditions of modularity of the congruence lattice of an act over a rectangular band
Authors: Kozhukhov I. B. , Pryanichnikov A. M. , Simakova A. R.
Published: September 2019

We describe acts over rectangular bands that have modular, distributive or linearly ordered congruence lattice. It turns out that such acts have at most 11 elements, and their congruence lattice has at most 300 elements. Furthermore, certain facts are established about the structure of acts with modular congruence lattice over an arbitrary semigroup and about the structure of the congruence lattice of an act over a rectangular band. The work is based on the description of acts over a completely (0-)simple semigroup obtained by Avdeev and Kozhukhov in 2000 and on the characterization of disconnected acts with modular or distributive congruence lattice by Ptakhov and Stepanova in 2013.
Greedy approximation by arbitrary sets
Authors: Borodin P. A.
Published: September 2019

We define various algorithms for greedy approximations by elements of an arbitrary set

in a Banach space. We study the convergence of these algorithms in a Hilbert space under various geometric conditions on

. As a consequence, we obtain sufficient conditions for the additive semigroup generated by

to be dense.
Vaught’s conjecture for weakly

-minimal theories of finite convexity rank
Authors: Kulpeshov B. Sh.
Published: September 2019

We prove that weakly

-minimal theories of finite convexity rank having less than

countable models are binary. Our main result is the confirmation of Vaught’s conjecture for weakly

-minimal theories of finite convexity rank.
Effect of reduced dietary non-phytate phosphorus concentration, with or without calcium reduction, in diets supplemented with phytase for weaned piglets from 28 to 63 days of age
Authors: Sélos A. N. , Donzele J. L. , Donzele R. F. M. O. , Castro T. R. , Cardoso E. F. , Rennó L. N. , Braga D. A. M.
Published: September 2019

The aim of this study was to investigate the impact of reduced dietary non-phytate phosphorus (nPP) or nPP and calcium (Ca) concentrations in diets supplemented with phytase on performance, bone mineralisation and serum parameters of weaned piglets from 28 to 63 days of age. A total of 168 barrows and gilts, weaned at 28 days of age, with an average initial bodyweight of 8.11 ± 0.61 kg were randomly allocated in a completely randomised block design. Treatments consisted of a positive control and an additional six treatments, in a 3 × 2 factorial arrangement, totalling seven treatments (Trt). The positive control (PC) diet was formulated to meet or exceed the nutrient requirements of pigs weighing 8–30 kg bodyweight, without phytase supplementation, and the six other diets were formulated similar to the PC, except with a reduction in the nPP concentration of 0.065, 0.130 or 0.195% (Phase Feeding 1 (PF1), PF2 or PF3 respectively) or similar to PF1, PF2 and PF3 minus 0.16% Ca, supplemented with 2000 FTU/kg of phytase, with eight replicate pens/Trt of three piglets each, in a three-phase feeding program. From Day 28 to Day 35, the average daily gain was higher (P < 0.05) and the feed conversion rate was lower (P < 0.05) respectively for piglets fed the PC when compared with those fed PF3 and PC treatment minus 0.160% calcium and minus 0.195% nPP (PF6). In contrast, when evaluating the period from Day 28 to 49, piglets fed PC presented the highest average daily gain, but only differed (P < 0.05) to those fed PF3 and PF6. When considering the overall period, at 63 days of age, no significant difference was detected (P > 0.05) between the PF Trts tested and the PC regarding performance. As for bone mineralisation at 63 days, bone P (BP) decreased as nPP in the diet decreased, regardless of the Ca level. However, except for PF3 and PF6, BP and third metacarpal bone ash concentration were respectively higher for pigs fed the PF Trts, when compared with PC. All treatments containing phytase resulted in a lower bone Ca:BP ratio when compared with PC. Serum P concentrations decreased as nPP in the diet decreased, regardless of the level of dietary Ca. However, with the exception of PF3 and PF6, serum P was not significantly different than pigs fed the PC. In conclusion, reducing nPP or nPP and Ca in diets containing 2000 FTU Ronozyme® HiPhos/kg phytase had no adverse effects on growth performance and increased BP and third metacarpal bone ash concentration compared with pigs fed a nutritionally adequate control diet.
A whole-farm investment analysis of a partial mixed ration feeding system for dairy cows
Authors: Henty S. , Ho C. K. M. , Auldist M. J. , Wales W. J. , Malcolm B.
Published: September 2019

Aim
A dairy farm in south-west Victoria was analysed to discern the impact on profit and risk of changing from a feeding system in the base case where grain was fed in the dairy and forage in the paddock, to a partial mixed ration (PMR) or a formulated grain mix (FGM) feeding system.

Context
A PMR feeding system involves feeding a well formulated mixed ration to a grazing dairy herd and typically requires the use of specialised machinery to mix and feed out the forage and grain components of the ration together onto a feed pad. In a FGM feeding system, the same formulated ration fed in the PMR system is used, but the grain component of the ration is fed using the existing feeding system in the dairy with the hay component fed in the paddock.

Method
The analysis used data from experiments recently performed to establish milk responses to mixed ration feeding under Australian conditions. The case study farm comprised 244 ha and a herd of 420 self-replacing Holstein-Friesian cows that calved from May to July. The herd feeding system was based on grazed pasture, grain fed in the dairy at milking and hay fed in the paddock. Supplementary feed comprised ~50% of metabolisable energy in the diet of the milking cows. The pre-existing feeding system was altered to incorporate either a PMR system or a FGM system. An increased herd size of an extra 100 cows, plus the PMR or FGM systems, was also tested.

Key results
All systems analysed were more profitable than the base case. Increasing the herd by 100 cows was the most profitable option for both the PMR and FGM systems, but intensifying the system by increasing cow numbers also had the most variability in profit.

Conclusions and implications
The FGM system was the most profitable system because milk production could be increased without the costs of extra labour, depreciation and repairs and maintenance associated with using a mixer wagon to feed the ration. The FGM system presents an option for farmers to expand or intensify their systems without needing to construct a feed pad or invest in extra machinery and equipment.
Health navigation and interpreting services for patients with limited English proficiency: a narrative literature review
Authors: Hilder Jo , Gray Ben , Stubbe Maria
Published: September 2019

ABSTRACT INTRODUCTIONCulturally and linguistically diverse populations (CALD) have significant health outcome disparities compared to dominant groups in high-income countries. The use of both navigators and interpreters are strategies used to address these disparities, but the intersections between these two roles can be poorly understood. AIMTo gain an overview of the literature on health navigation and similar roles, with particular reference to the New Zealand context, and to explore the interface between these roles and that of interpreters for CALD populations with limited English proficiency. METHODSA narrative review of the literature was conducted using a range of search strategies and a thematic analysis was conducted. RESULTSThere are several barriers to health-care access relating to health systems and CALD populations. For over 50 years, health workers who are members of these communities have been used to address these barriers, but there are many terms describing workers with wide-ranging roles. There is some evidence of efficacy in economic, psychosocial and functional terms. For health navigation services to work, they need to have staff who are well selected, trained and supported; are integrated into health-care teams; and have clearly defined roles. There may be a place for integrating interpreting more formally into the navigator role for members of communities who have limited English proficiency. CONCLUSIONTo achieve better access to health care for CALD populations, there is an argument for adding another member to the health team who combines clearly defined aspects of the roles of interpreter, community health worker and navigator. Organisations considering setting up such a position should have a clear target population, carefully consider the barriers they are trying to address and define a role, scope of practice and training requirements best suited to addressing those barriers.
Ancestral roles of the Fam20C family of secreted protein kinases revealed in C. elegans
Authors: Gerson-Gurwitz Adina , Worby Carolyn A. , Lee Kian-Yong , Khaliullin Renat , Bouffard Jeff , Cheerambathur Dhanya , Oegema Karen , Cram Erin J. , Dixon Jack E. , Desai Arshad
Published: September 2019

Fam20C is a secreted protein kinase mutated in Raine syndrome, a human skeletal disorder. In vertebrates, bone and enamel proteins are major Fam20C substrates. However, Fam20 kinases are conserved in invertebrates lacking bone and enamel, suggesting other ancestral functions. We show that FAMK-1, the Caenorhabditis elegans Fam20C orthologue, contributes to fertility, embryogenesis, and development. These functions are not fulfilled when FAMK-1 is retained in the early secretory pathway. During embryogenesis, FAMK-1 maintains intercellular partitions and prevents multinucleation; notably, temperature elevation or lowering cortical stiffness reduces requirement for FAMK-1 in these contexts. FAMK-1 is expressed in multiple adult tissues that undergo repeated mechanical strain, and selective expression in the spermatheca restores fertility. Informatic, biochemical, and functional analysis implicate lectins as FAMK-1 substrates. These findings suggest that FAMK-1 phosphorylation of substrates, including lectins, in the late secretory pathway is important in embryonic and tissue contexts where cells are subjected to mechanical strain.
A Photon-Counting Full-Waveform Lidar*
Authors: Du Bing-Cheng , Li Zhao-Hui , Shen Guang-Yue , Zheng Tian-Xiang , Zhang Hai-Yan , Yang Lei , Wu Guang
Published: September 2019

We present the results of using a photon-counting full-waveform lidar to obtain detailed target information with high accuracy. The parameters of the waveforms (i.e., vertical structure, peak position, peak amplitude, peak width and backscatter cross section) are derived with a high resolution limit of 31 mm to establish the vertical structure and scattering properties of targets, which contribute to the recognition and classification of various scatterers. The photon-counting full-waveform lidar has higher resolution than linear-mode full-waveform lidar, and it can obtain more specific target information compared to photon-counting discrete-point lidar, which can provide a potential alternative technique for tomographic surveying and mapping.
The 2D InSe/WS2 Heterostructure with Enhanced Optoelectronic Performance in the Visible Region*
Authors: Yang Lu-Lu , Shi Jun-Jie , Zhang Min , Wei Zhong-Ming , Ding Yi-Min , Wu Meng , He Yong , Cen Yu-Lang , Guo Wen-Hui , Pan Shu-Hang , Zhu Yao-Hui
Published: September 2019

Two-dimensional (2D) InSe and WS2 exhibit promising characteristics for optoelectronic applications. However, they both have poor absorption of visible light due to wide bandgaps: 2D InSe has high electron mobility but low hole mobility, while 2D WS2 is on the contrary. We propose a 2D heterostructure composed of their monolayers as a solution to both problems. Our first-principles calculations show that the heterostructure has a type-II band alignment as expected. Consequently, the bandgap of the heterostructure is reduced to 2.19 eV, which is much smaller than those of the monolayers. The reduction in bandgap leads to a considerable enhancement of the visible-light absorption, such as about fivefold (threefold) increase in comparison to monolayer InSe (WS2) at the wavelength of 490 nm. Meanwhile, the type-II band alignment also facilitates the spatial separation of photogenerated electron-hole pairs; i.e., electrons (holes) reside preferably in the InSe (WS2) layer. As a result, the two layers complement each other in carrier mobilities of the heterostructure: the photogenerated electrons and holes inherit the large mobilities from the InSe and WS2 monolayers, respectively.
Machine Learning and Micromagnetic Studies of Magnetization Switching
Authors: Miao Jing-Yue
Published: September 2019

Magnetization switching is one of the most fundamental topics in the field of magnetism. Machine learning (ML) models of random forest (RF), support vector machine (SVM), deep neural network (DNN) methods are built and trained to classify the magnetization reversal and non-reversal cases of single-domain particle, and the classification performances are evaluated by comparison with micromagnetic simulations. The results show that the ML models have achieved great accuracy and the DNN model reaches the best area under curve (AUC) of 0.997, even with a small training dataset, and RF and SVM models have lower AUCs of 0.964 and 0.836, respectively. This work validates the potential of ML applications in studies of magnetization switching and provides the benchmark for further ML studies in magnetization switching.
Tailoring optical discs for surface plasmon polaritons generation
Authors: Sierant Aleksandra , Panaś Roman , Fiutowski Jacek , Rubahn Horst-Günter , Kawalec Tomasz
Published: September 2019

The article reports on an optimization of gold submicron structures based on modified recordable blank digital versatile discs for surface plasmon polaritions excitation, mainly in near-infrared region. We have examined internal layers of commercially available DVD+R, DVD-R, DVD+RW and DVD-RW optical discs and we have elaborated a simple, inexpensive approach providing sharp resonances with efficiency reaching 95% for collimated excitation laser beams. We have experimentally and numerically confirmed the SPPs intensity being up to 220 times the intensity of the excitation laser beam. We have also directly measured thermal energy loss accompanying SPPs excitation.
Ultracold atoms in disordered potentials: elastic scattering time in the strong scattering regime
Authors: Signoles Adrien , Lecoutre Baptiste , Richard Jérémie , Lim Lih-King , Denechaud Vincent , Volchkov Valentin V , Angelopoulou Vasiliki , Jendrzejewski Fred , Aspect Alain , Sanchez-Palencia Laurent , Josse Vincent
Published: September 2019

We study the elastic scattering time

τ

s

of ultracold atoms propagating in optical disordered potentials in the strong scattering regime, going beyond the recent work of Richard et al (2019 Phys. Rev. Lett.
122 100403). There, we identified the crossover between the weak and the strong scattering regimes by comparing direct measurements and numerical simulations to the first order Born approximation. Here we focus specifically on the strong scattering regime, where the first order Born approximation is not valid anymore and the scattering time is strongly influenced by the nature of the disorder. To interpret our observations, we connect the scattering time

τ

s

to the profiles of the spectral functions that we estimate using higher order Born perturbation theory or self-consistent Born approximation. The comparison reveals that self-consistent methods are well suited to describe

τ

s

for Gaussian-distributed disorder, but fails for laser speckle disorder. For the latter, we show that the peculiar profiles of the spectral functions, as measured independently in Volchkov et al (2018 Phys. Rev. Lett.
120 060404), must be taken into account. Altogether our study characterizes the validity range of usual theoretical methods to predict the elastic scattering time of matter waves, which is essential for future close comparison between theory and experiments, for instance regarding the ongoing studies on Anderson localization.