bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multipolar and bulk modes: fundamentals of single-particle plasmonics through the advances in electron and photon techniques
Authors: Tsoulos Ted V. , Batson Philip E. , Fabris Laura 
Published: October 2020

Abstract
Recent developments in the application of plasmonic nanoparticles have showcased the importance of understanding in detail their plasmonic resonances at the single-particle level. These resonances can be excited and probed through various methods, which can be grouped in four categories, depending on whether excitation and detection involve electrons (electron energy loss spectroscopy), photons (e.g., dark-field microscopy), or both (cathodoluminescence and photon-induced near-field electron microscopy). While both photon-based and electron-based methods have made great strides toward deepening our understanding of known plasmonic properties and discovering new ones, they have in general progressed in parallel, without much cross-pollination. This evolution can be primarily attributed to the different theoretical approaches driving these techniques, mainly dictated by the inherent different nature of electrons and photons. The discrepancies that still exist among them have hampered the development of a holistic approach to the characterization of plasmonic materials. In this review therefore, we aim to briefly present those electron-based and photon-based methods fundamental to the study of plasmonic properties at the single-particle level, with an eye to new behaviors involving multipolar, propagating, and bulk modes coexisting in colloidal nanostructures. By exploring the key fundamental discoveries in nanoparticle plasmonics achieved with these techniques, herein we assess how integrating this information could encourage the creation of a unified understanding of the various phenomena occurring in individual nanoparticles, which would benefit the plasmonics and electron microscopy communities alike.
Multiobjective and categorical global optimization of photonic structures based on ResNet generative neural networks
Authors: Jiang Jiaqi , Fan Jonathan A. 
Published: October 2020

AbstractWe show that deep generative neural networks, based on global optimization networks (GLOnets), can be configured to perform the multiobjective and categorical global optimization of photonic devices. A residual network scheme enables GLOnets to evolve from a deep architecture, which is required to properly search the full design space early in the optimization process, to a shallow network that generates a narrow distribution of globally optimal devices. As a proof-of-concept demonstration, we adapt our method to design thin-film stacks consisting of multiple material types. Benchmarks with known globally optimized antireflection structures indicate that GLOnets can find the global optimum with orders of magnitude faster speeds compared to conventional algorithms. We also demonstrate the utility of our method in complex design tasks with its application to incandescent light filters. These results indicate that advanced concepts in deep learning can push the capabilities of inverse design algorithms for photonics.
Perspective on using multiple orbital-angular-momentum beams for enhanced capacity in free-space optical communication links
Authors: Willner Alan E. , Liu Cong 
Published: October 2020

Abstract
Structured light has gained much interest in increasing communications capacity through the simultaneous transmission of multiple orthogonal beams. This paper gives a perspective on the current state of the art and future challenges, especially with regards to the use of multiple orbital angular momentum modes for system performance enhancement.
Vom Krieg zur Liebe. Nietzsches Philosophieren über Männlichkeiten im Lichte von Gegenwartsdebatten
Authors: Thorgeirsdottir Sigridur 
Published: October 2020

Abstract
Recent discussions have connected Nietzsche’s philosophy of masculinity to the return of authoritarian politics. Neoconservative debates about masculinity, and right-wing extremism, explicitly refer back to Nietzsche’s philosophy and often present democratization, a feminization of society, and political correctness as responsible for a weakening of masculinity. One example for this reception of Nietzsche’s writings is Jordan Peterson’s psychological diagnosis of a presumed crisis of masculinity. This article undertakes a comparison of Nietzsche’s philosophy of masculinities with Peterson’s neo-Jungian psychology of masculinity in the context of recent conceptualizations of patriarchy, misogyny, and gendered forms of ressentiment. This comparison will highlight that Nietzsche’s conception of masculinity is more complex, and has philosophically more to offer, than neoconservative ideas about masculinity that onesidedly foreground male strength. Finally it will be pointed out how a Jungian analysis discloses aspects of the Dionysian that are of relevance to contemporary gender studies of Nietzsche’s philosophy.
Influence of the earth connections of the PWM drive on the voltage constraints endured by the motor insulation
Authors: Roger Daniel , Napieralska-Juszczak Ewa , Komeza Krzysztof 
Published: October 2020

AbstractThe high electrical stresses in the Electrical Insulation Systems of machines fed by pulse width modulation (PWM) inverters remain a limitation of the lifetime. The stress is caused by repetitive over voltages caused by the short switching times of the PWM inverter power electronic circuit. This paper provides measurements made on an industrial drive connected to the grid with standard cables that include a ground connection wire, following the current standards. The phase-to-phase, phase-to-neutral, and neutral-to-ground voltages are measured focusing on short and repetitive voltage spikes. The causes of these voltage spikes are analyzed using a high frequency equivalent circuit of the whole drive, including the earthing system. The simulations are made with the well-known SPICE circuit simulator. This study focuses on the common-mode currents flowing in the earthing connections and its influence on voltage spikes. A solution that can reduce significantly the phase-to-neutral voltage spikes is proposed.
At the end of the world? Settlement in the Šumava mountains and foothills in later prehistory
Authors: Dreslerová Dagmar , Romportl Dušan , Čišecký Čeněk , Fröhlich Jiří , Michálek Jan , Metlička Milan , Parkman Marek , Pták Martin 
Published: October 2020

Abstract
The aim of this paper is to explore and define the boundary of the zone of inland, mainly agricultural settlement in southern and western Bohemia, Czech Republic in the later prehistory, and to try to determine why such settlement appears not to have spread further into the Šumava foothills and mountains. With the help of predictive MaxEnt modelling – used in ecology to determine the degree of uncertainty in the geographic distribution of species – and using a comparison with data on soil productivity, we explore whether in later prehistory the agricultural settlement was limited by unsuitable natural conditions or by other factors. The boundaries of the territory suitable for agropastoral farming most probably moved in time with technological advances, increases in population density, and the changing preferences of inhabitants of the Bronze and Iron Ages. The margin of agricultural settlement in the foothills describes a line beyond which agriculture had become unprofitable; a similar boundary existed throughout the Early Middle Ages. At the same time, there was a good deal of contact across the mountains with Bavaria and Upper Austria, as is shown by archaeology both in the form of similarities between the prehistoric typo-chronological complexes and by finds of bronze and iron items along presumed routes of access. There were also montane sites (whose function is still unknown) situated beyond the margin of the agricultural zone, such as the recently discovered settlements on the Křemelná river. Apart from prospection, a wide range of other activities could have taken place, including those connected with communication and routes of access to Bavaria and Upper Austria, with which Šumava formed a common typo-chronological group.
Metrological characterization of the thermomechanical influence of the cross-section of the undeformed chip on the surface properties in turning of the aluminum alloy EN AW-2017
Authors: Junge Thomas , Mehner Thomas , Nestler Andreas , Schubert Andreas , Lampke Thomas 
Published: October 2020

Abstract
The surface integrity strongly affects the performance properties of parts. Therefore, it is of great importance to be able to measure and adjust the surface-layer properties during the manufacturing process. In particular, cutting operations are characterized by high mechanical loads and temperature gradients in the area of chip formation. To enable a targeted control of the surface-layer properties, a fundamental comprehension of the interrelationships between the thermomechanical impact and the thereby induced material modification is required. Hence, the subject of this study is to measure the thermomechanical changes during turning of the aluminium alloy EN AW-2017 and find correlations thereof to the surface integrity. In order to achieve a large variation of the thermal and mechanical loads, the feed f (0.04 mm to 0.2 mm) and the depth of cut

a

p

{a_{\mathrm{p}}}

(0.4 mm to 2 mm) are varied over a wide range. The cutting speed

v

c

{v_{\mathrm{c}}}

is kept constant (300 m/min). For the in-process measurement of the temperatures and contact conditions at the interface of the tool and the specimen, a tool-workpiece thermocouple is used. Additionally, the components of the resultant force are measured by a dynamometer. The characterization of the surface layer is performed by the measurement of the residual stresses using X-ray diffraction and supplemented by the determination of the geometrical properties of the machined surface using a stylus measurement instrument. The results show an increase in temperature and the components of the resultant force with the enlargement of the cross-section of the undeformed chip. Due to the temperature gradient, tensile residual stresses are introduced in the tangential direction of the surface layer. Compressive residual stresses occur only in the axial direction and can be correlated with the in-process measurement data by introducing the C-value. Consequently, the calculation of the presence of compressive residual stresses allows for a targeted control of the surface-layer properties during machining.
Recontextualisation and advocacy in the translation zone
Authors: Blackledge Adrian , Creese Angela 
Published: October 2020

Abstract
This paper reports an element of a team linguistic ethnography which investigated the ways people communicate with each other in the changing, dynamic environments of superdiverse cities in the UK. The particular example examined here is that of a ‘translation zone’ between an advice worker and her Chinese clients in a community centre with a remit to support Chinese people in the city. In the interaction the advice worker, herself a migrant from China, translates relevant aspects of the complex, bureaucratic welfare benefits system, deploying interlingual, intralingual, and intersemiotic translation. More than this, however, the advice worker engages in recontextualisation, co-constructing and re-shaping the client’s narrative so that it meets the criteria of the government welfare benefits office. Recontextualisation is a consistent feature of the discourse practice of the advice worker as she seeks to support her clients. We propose that it may well be a salient feature of interactional encounters as people seek help and advocacy to negotiate complex bureaucratic systems.
Surface-state energies and wave functions in layered organic conductors
Authors: Krstovska Danica , Skeparovski Aleksandar 
Published: October 2020

Abstract
We have calculated and analyzed the surface-state energies and wave functions in quasi-two dimensional (Q2D) organic conductors in a magnetic field parallel to the surface. Two different forms for the electron energy spectrum are used in order to obtain more information on the elementary properties of surface states in these conductors. In addition, two mathematical approaches are implemented that include the eigenvalue and eigenstate problem as well as the quantization rule. We find significant differences in calculations of the surface-state energies arising from the specific form of the energy dispersion law. This is correlated with the different conditions needed to calculate the surface-state energies, magnetic field resonant values and the surface wave functions. The calculations reveal that the value of the coordinate of the electron orbit must be different for each state in order to numerically calculate the surface energies for one energy dispersion law, but it has the same value for each state for the other energy dispersion law. This allows to determine more accurately the geometric characteristics of the electron skipping trajectories in Q2D organic conductors. The possible reasons for differences associated with implementation of two distinct energy spectra are discussed. By comparing and analyzing the results we find that, when the energy dispersion law obtained within the tight-binding approximation is used the results are more relevant and reflect the Q2D nature of the organic conductors. This might be very important for studying the unique properties of these conductors and their wider application in organic electronics.
Composition of the essential oils of three Malaysian Xylopia species (Annonaceae)
Authors: Shakri Natasa Mohd , Salleh Wan Mohd Nuzul Hakimi Wan , Khamis Shamsul , Mohamad Ali Nor Azah , Nadri Muhammad Helmi 
Published: October 2020

Abstract
The rich and diversified Malaysian flora represents an excellent resource of new chemical structures with biological activities. The genus Xylopia L. includes aromatic plants that have both nutritional and medicinal uses. This study aims to contribute with information about the volatile components of three Xylopia species essential oils: Xylopia frutescens, Xylopia ferruginea, and Xylopia magna. In this study, essential oils were extracted from the leaves by a hydrodistillation process. The identification of the essential oil components was performed by gas chromatography (GC-FID) and gas chromatography–coupled mass spectrometry (GC-MS). The major components of the essential oils from X. frutescens were bicyclogermacrene (22.8%), germacrene D (14.2%), elemol (12.8%), and guaiol (12.8%), whereas components of the essential oils from X. magna were germacrene D (35.9%), bicyclogermacrene (22.8%), and spathulenol (11.1%). The X. ferruginea oil was dominated by bicyclogermacrene (23.6%), elemol (13.7%), guaiol (13.4%), and germacrene D (12.3%).
Chemogenetic Inhibition of Infralimbic Prefrontal Cortex GABAergic Parvalbumin Interneurons Attenuates the Impact of Chronic Stress in Male Mice
Authors: Nawreen Nawshaba , Cotella Evelin M. , Morano Rachel , Mahbod Parinaz , Dalal Khushali S. , Fitzgerald Maureen , Martelle Susan , Packard Benjamin A. , Franco-Villanueva Ana , Moloney Rachel D. , Herman James P. 
Published: October 2020

AbstractHypofunction of the prefrontal cortex (PFC) contributes to stress-related neuropsychiatric illnesses. Mechanisms leading to prefrontal hypoactivity remain to be determined. Prior evidence suggests that chronic stress leads to an increase in activity of parvalbumin (PV) expressing GABAergic interneurons (INs) in the PFC. The purpose of the study was to determine whether reducing PV IN activity in the Infralimbic (IL) PFC would prevent stress-related phenotypes. We used a chemogenetic approach to inhibit IL PFC PV INs during stress. Mice were first tested in the tail suspension test (TST) to determine the impact of PV IN inhibition on behavioral responses to acute stress. The long-term impact of PV IN inhibition during a modified chronic variable stress (CVS) was tested in the forced swim test (FST). Acute PV IN inhibition reduced active (struggling) and increased passive coping behaviors (immobility) in the TST. In contrast, inhibition of PV INs during CVS increased active and reduced passive coping behaviors in the FST. Moreover, chronic inhibition of PV INs attenuated CVS-induced changes in Fos expression in the prelimbic cortex (PrL), basolateral amygdala (BLA), and ventrolateral periaqueductal gray (vlPAG) and also attenuated adrenal hypertrophy and body weight loss associated with chronic stress. Our results suggest differential roles of PV INs in acute versus chronic stress, indicative of distinct biological mechanisms underlying acute versus chronic stress responses. Our results also indicate a role for PV INs in driving chronic stress adaptation and support literature evidence suggesting cortical GABAergic INs as a therapeutic target in stress-related illnesses.
A Focal Inactivation and Computational Study of Ventrolateral Periaqueductal Gray and Deep Mesencephalic Reticular Nucleus Involvement in Sleep State Switching and Bistability
Authors: Grace Kevin P. , Horner Richard L. 
Published: October 2020

AbstractNeurons of the ventrolateral periaqueductal gray (vlPAG) and adjacent deep mesencephalic reticular nucleus (DpMe) are implicated in the control of sleep-wake state and are hypothesized components of a flip-flop circuit that maintains sleep bistability by preventing the overexpression of non-rapid eye movement (NREM)/REM sleep intermediary states (NRt). To determine the contribution of vlPAG/DpMe neurons in maintaining sleep bistability we combined computer simulations of flip-flop circuitry with focal inactivation of vlPAG/DpMe neurons by microdialysis delivery of the GABAAreceptor agonist muscimol in freely behaving male rats (n = 25) instrumented for electroencephalographic and electromyographic recording. REM sleep was enhanced by muscimol at the vlPAG/DpMe, consistent with previous studies; however, our analyses of NRt dynamicsin vivoand those produced by flop-flop circuit simulations show that current thinking is too narrowly focused on the contribution of REM sleep-inactive populations toward vlPAG/DpMe involvement in REM sleep control. We found that much of the muscimol-mediated increase in REM sleep was more appropriately classified as NRt. This loss of sleep bistability was accompanied by fragmentation of REM sleep, as evidenced by an increased number of short REM sleep bouts. REM sleep fragmentation stemmed from an increased number and duration of NRt bouts originating in REM sleep. By contrast, NREM sleep bouts were not likewise fragmented by vlPAG/DpMe inactivation. In flip-flop circuit simulations, these changes could not be replicated through inhibition of the REM sleep-inactive population alone. Instead, combined suppression of REM sleep active and inactive vlPAG/DpMe subpopulations was required to replicate the changes in NRt dynamics.
The Structure of the Discharge Site of Steam Hydrothermal Fluids in the Area of the Upper Pauzhetka Thermal Field (Southern Kamchatka)
Authors: Feofilaktov S.O. , Rychagov S.N. , Bukatov Yu.Yu. , Nuzhdaev I.A. , Denisov D.K. 
Published: October 2020

Abstract
—Comprehensive geological and geophysical investigations were conducted to obtain new data on the structure and physical nature of the discharge site of steam hydrothermal fluids by the example of the Pauzhetka geothermal deposit (southern Kamchatka). An isometric concentric zonal structure has been identified within the temperature, geoelectric, magnetic, and gravimetric fields. It spatially correlates with an elevated tectonic block previously detected in the area of the Upper Pauzhetka thermal field. The central part of this structure includes a consolidated rock block composed presumably of quartz–adularia metasomatites formed at the pre-Holocene stage of evolution of the Pauzhetka hydrothermal system. The rocks form a physical heterogeneity within the structure of the aquifer, which greatly contributes to the distribution of flows of ascending thermal, mixed, and meteoric waters beneath the Upper Pauzhetka thermal field. The central area of the isometric concentric zonal structure is outlined by a zone consisting of local anomalies of positive magnetic-field values. The wide occurrence of subintrusive bodies (sills, dikes, and extrusion roots) of intermediate to rhyolite composition suggests the magmatic nature of the identified anomalies. The peripheral areas correlate with large discharge sites of high-temperature fluids. Thus, it is demonstrated that the structure of the circulation zones of waters of various types in the area of the Upper Pauzhetka thermal field is governed by the concentric zonal structure of the elevated tectonic block and the distribution of physical heterogeneities, both primary (of magmatic or volcanosedimentary nature) and resulted from the hydrothermal metasomatic alteration of the source rocks.
Methane Fluxes at the Water–Atmosphere Interface in the Southern Tatar Strait of the Sea of Japan: Distribution and Variation
Authors: Shakirov R.B. , Valitov M.G. , Syrbu N.S. , Yatsuk A.V. , Obzhirov A.I. , Mishukov V.F. , Lifanskii E.V. , Mishukova O.V. , Salomatin A.S. 
Published: October 2020

Abstract
—We present the results of gas-geochemical surveys in the sea surface water layer, water column, and bottom sediments of the Tatar Strait (north of the Sea of Japan) in 2012, 2014, 2015, 2017, and 2018. The distribution of methane fluxes at the water–atmosphere interface is examined, and its relationship with the geologic structure of the Tatar Strait area is discussed. Methane emission has been revealed throughout most of the Tatar Strait area. The most intense methane fluxes at the water–atmosphere interface, up to 482 mol/(km2×day), are observed on the gas-bearing southwestern shelf and on the gas hydrate slope of Sakhalin Island. The high concentrations of methane in seawater and the high contents of methane, hydrogen, and helium in the shelf and slope bottom sediments are probably due to the seismotectonic activity in the region, the presence of gas hydrates, gas concentration zones, gas migration channels, and the regional deep structure. Application of the model for calculation of the flux and impurity transfer fields to the studied water area has shown high methane emission from the sea surface in areas of vertical gas migration from lithospheric sources. The contribution of hydrodynamic factors to the formation of such zones of high methane emission is less than that of geologic factors. The obtained data on methane flux at the water–atmosphere interface for a shallow sea gave a detailed insight into the main gas discharge zones in the southern Tatar Strait.