bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transactional sex among young people in Switzerland: a cross-sectional study
Authors: Surís Joan-Carles , Stadelmann Sophie , Auderset Diane , Barrense-Dias Yara 
Published: November 2021

Background The aim of this research was to determine the prevalence and characteristics of youths having ever exchanged sex and to assess if there were differences depending on whether they had done it once or several times. We also investigated what they exchanged sex for and their relationship with the last person they did it with. Methods A cross-sectional national survey was carried out in Switzerland in 2017 among young adults. The 5175 participants (51% males, mean age 26.3 years) who answered the question ‘Have you ever received something or obtained an advantage in exchange for a sexual act?’ were divided into three groups: Never (96.8%), Once (1.5%) and Several (1.7%). Results In the multivariate analysis, compared to the Never group, those in the Once group were significantly more likely to be males, to have a poor mental health, to be non-exclusively heterosexual and to have had 10+ lifetime sexual partners. Those in the Several group reported the same characteristics, but were also more likely to be younger at first sexual contact, to have their parents not living together, to report a lower socioeconomic status and a history of sexual abuse, and to have ever sent sexual images/videos of themselves. They were also less satisfied with their financial situation. Conclusions Results indicate that transactional sex is a reality for some youths in Switzerland, and health professionals dealing with them should include this question in their sexual anamnesis. From a public health perspective, sexual education and prevention campaigns should include this phenomenon.
‘I’m not a tech person’
Authors: Lee Carmen , Chau Dennis 
Published: November 2021

AbstractThis study contributes to existing research on polymedia by probing into what we callacademic polymedia, investigating the constant availability of interpersonal, professional, and social media for constructing scholarly personas. Drawing on the technobiographical narratives of a group of Hong Kong bilingual academics, we analyze academics’ perceptions of their media choices as situated in their professional polymedia environments. In particular, we examine how choices between public and private media shape academic persona development, and the way polymedia engagement impacts the participants’ language choice for academic purposes. This study sheds light on existing research on workplace discourse and identity in sociolinguistics by offering a polymedia dimension that draws on people’s media ideology in developing their professional identities.
Polymedia repertoires of networked individuals
Authors: Tagg Caroline , Lyons Agnieszka 
Published: November 2021

AbstractThis article introduces the concept of thepolymedia repertoireto explore how social meaning is indexed through the interplay of communicative resources at different levels of expression (from choice of media to individual signs) in digitally mediated interactions. The multi-layered polymedia repertoire highlights how people move fluidly between media platforms, semiotic modes and linguistic resources in the course of their everyday interactions, and enables us to locate digital communications within individuals’ wider practices. The potential of our theoretical contribution is illustrated through analysis of mobile phone messaging between participants in a large multi-sited ethnography of the communicative practices of multilingual migrants working in linguistically diverse UK city neighbourhoods. Our analysis of mobile messaging exchanges in aday-in-the-lifeof these networked individuals reveals the importance ofdevice attentionin shaping interpersonal interactions, as well as the complex ways in which choices at different levels of a polymedia repertoire are structured by social relationships, communicative purpose and (dis)identification processes.
Polymedia and family multilingualism
Authors: Lexander Kristin Vold 
Published: November 2021

Abstract
This paper investigates family multilingualism in a polymedia perspective, presenting results from a study of
transnational communication among four families with Senegalese background, living in Norway. Ethnographic interview data collected in 2017
and 2018, including mediagrams, are analysed to get insight into the families’ uses of media and language. Furthermore, the moment-by-moment
language practices through which family relationships are managed and sustained are examined through fine-grained analysis of interpersonal
interaction. The paper thus both draws on and goes beyond polymedia to investigate how linguistic repertoires are developed in digital
communication. The aim is to explore ways in which this theory may help us rethink family multilingualism as digital language practices
become increasingly significant.
Appearances
Authors: Kelbert Eugenia 
Published: November 2021

AbstractThis article re-evaluates the theoretical import of networks of signification, one of Antoine Berman’s twelve deforming tendencies in translation. TakingJane Eyreas a case study, the article considers character description as an example of a Bermanian network and traces the physical appearance of the novel’s characters across its six Russian translations. Character description represents a network that is traceable, depends on the reader’s ability to construct a visual mental image over the course of a narrative, has a tangible impact on characterisation, and remains relevant throughout a novel. It thus offers a concrete illustration of the relevance of networks of signification as a model for the systemic interpretative potential of translation variation. This analysis paves the way for further study of Bermanian networks and the ultimate integration of this concept in translation practice.
Evolution and decline: transformation of social movements in Nigeria
Authors: Ajala Olayinka 
Published: November 2021

ABSTRACTDespite the rising academic scholarship on democracy, particularly the role played by social movements in entrenching democracy in Africa, few studies have explored the transformation of social movements after they have achieved (or come close to achieving) their stated goals. Using a case study of the Oodua Peoples Congress in Nigeria, this study argues that social movements in Africa lack the capacity to transform and often become partisan or disintegrate. The study concludes that the unique characteristics of African politics, coupled with the inability of social movements to maintain public support after initial gains, eventually weaken the movements.
Imaging of 3D objects with experimental data using orthogonality sampling methods
Authors: Le Thu , Nguyen Dinh-Liem , Schmidt Hayden , Truong Trung 
Published: November 2021

Abstract
This paper is concerned with imaging of 3D scattering objects with experimental data from the Fresnel database. The first goal of the paper is to investigate a modified version of the orthogonality sampling method (OSM) by Harris and Nguyen [2020 SIAM J. Sci. Comput.
42 B72–737] for the imaging problem. The advantage of the modified OSM over its original version lies in its applicability to more types of polarization vectors associated with the electromagnetic scattering data. We analyze the modified OSM using the factorization analysis for the far field operator and the Funk–Hecke formula. The second goal is to verify the performance of the modified OSM, the OSM, and the classical factorization method for the 3D Fresnel database. The modified OSM we propose is able to invert the sparse and limited-aperture real data in a fast, simple, and efficient way. It is also shown in the real data verification that the modified OSM performs better than its original version and the factorization method.
Directional manipulation of diffusio-osmosis flow by design of solute-wall and solvent-wall interactions
Authors: Wang Xin , Jing Dengwei 
Published: November 2021

Abstract
Understanding of diffusio-osmosis, the flow induced by a solute gradient acting in narrow interfacial layers at a nanoscale solid-liquid interface, is of great value in view of the increasing importance of micro- and nano-fluidic devices and self-propelling particles. Using molecular dynamics simulations, we employ an appropriate strategy for direct simulation of diffusio-osmosis flows, mimicking a realistic experiment without any assumed external forces. It allows us to obtain reliable flow details, which are hard to obtain in experiments. We found that the solvent-wall interaction, previously overlooked in the classical paradigm, plays a critical role in the diffusio-osmosis process. In particular, diffusio-osmosis is controlled by the interaction difference between the solute-wall and solvent-wall. When the solute-wall interaction is stronger (weaker) than the solvent-wall, a surface excess (depletion) of solute particles on the solid-liquid interface is formed, which induces diffusio-osmosis flow towards a low (high) concentration. We modified the classical Derjaguin expression to include the effect of nanoscale hydrodynamics boundary conditions for the accurate prediction of diffusio-osmosis characteristics. Overall, our results provide clear guidance for controlling fluid flow and manipulating the motion of colloids under tunable solute concentrations.
Compton-like dark photon production in electron–nucleus collisions
Authors: Oliveira C P , Hadjimichef D , Machado M V T 
Published: November 2021

Abstract
The Compton-like production of massive dark photons is investigated in ultrarelativistic electron–ion collisions by considering the kinetic mixing between the dark photon and the standard model photon. The quasi-real photons in the heavy ion are described by the equivalent photon approximation, and the model is employed to calculate the integrated cross section and event rates as a function of the dark photon mass, m

γ′, and mixing parameter, ɛ. Predictions are shown for electron–ion colliders (EICs) in the mass range 100 ⩽ m

γ′ ⩽ 500 MeV. Numerical results are provided within the kinematic coverage of the planned machines: an EIC in China (EicC), a polarized EIC at Jefferson Lab (JLEIC), an EIC/USA (EIC), a large hadron electron collider (LHeC) and a future circular collider (FCC-eA). It complements existing search strategies for dark photons in the considered mass interval.
Pair production of magnetic monopoles and stable high-electric-charge objects in proton–proton and heavy-ion collisions
Authors: Song Wen-Yi , Taylor Wendy 
Published: November 2021

Abstract
We describe pair-production models of spin-0 and spin-½ magnetic monopoles and high-electric-charge objects (HECOs) in proton–proton (pp) and heavy-ion collisions, considering both the Drell–Yan (DY) and the photon-fusion processes. In particular, we extend the DY production model of spin-½ HECOs to include Z
0-boson exchange for pp collisions. Furthermore, we explore spin-½ and, for the first time, spin-0 production in ultraperipheral heavy-ion collisions. With matrix element calculations and equivalent photon fluxes implemented in MadGraph5_aMC@NLO, we present leading-order production cross sections of these mechanisms in

s

=
14

TeV pp collisions and

s

NN

=
5.5

TeV ultraperipheral lead–lead collisions at the LHC. While the mass range accessible in ultraperipheral lead–lead collisions is much lower than that in pp collisions, we find that the theoretical production cross sections are significantly enhanced in the former for masses below 82 GeV.
Highly stretchable-compressible coiled polymer sensor for soft continuum manipulator
Authors: Youn Jung-Hwan , Mun Heeju , Jang Seung-Yeon , Kyung Ki-Uk 
Published: November 2021

Abstract
In recent years, soft continuum robots have become emerging research hotspots, but sensing of the robot shape needs to be addressed for precise control. To solve this problem, we present an optical coiled polymer sensor that can measure strain based on macro bending power loss. Proposed sensor is fabricated by coiling and annealing a polymer optical fiber of diameter 0.25 mm. Under applied strain, the bending curvature of the coiled sensor changes which leads to light intensity change. Due to its coiled design, the proposed sensor is highly stretchable and can measure both tensile and compressive strain of the coiled sensor structure in a wide range (>250%). Static and dynamic responses of the proposed sensor were observed by controlling the design parameters, such as spring diameter and number of coils. Fabricated coiled polymer sensor with a light-weight (<0.5 g) and compact structure showed a high stretchability-compressibility, high stability, and low hysteresis error. By placing three fabricated sensors inside the soft continuum manipulator, a 3-degree-of-freedom (DOF) configuration including bending and torsion motions can be obtained. We used an artificial neural network to derive the relationship between the sensor outputs and the 3 DOFs configuration of the soft continuum manipulator. The results showed that the configuration of the soft continuum manipulator can be obtained in real-time with high accuracy (error < 2.17%).
OPCL coupling of mixed integer-fractional order oscillators: tree and chain implementation
Authors: Adelakun Adedayo O 
Published: November 2021

Abstract
Controlling coupled oscillators and their application are important in diverse areas of nonlinear science and technology. In this paper, a unidirectional Open-Plus-Closed-Loop coupling (OPCL) scheme in controlling two mixed oscillators with emphasis on fractance and integer-order configurations was introduced. The appropriate choice of the controller between coupled non-identical oscillators is justified to achieve the coexistence of anti-phase and complete synchronization via amplitude death. The possibility of controlling one response variable, keeping the other pairs of variable undisturbed are deduced with different configurations. This type of mixed synchronization emanated from coupled integer and fractional-order Sprott-A oscillators without interception and loss of stability. The main novelty in this work is the analog implementation for the coupled integer-order, tree, and chain configurations which are simulated and discussed extensively.
Carbon fiber electrodes for intracellular recording and stimulation
Authors: Huan Yu , Gill Jeffrey P , Fritzinger Johanna B , Patel Paras R , Richie Julianna M , Della Valle Elena , Weiland James D , Chestek Cynthia A , Chiel Hillel J 
Published: November 2021

Abstract

Objective. To understand neural circuit dynamics, it is critical to manipulate and record many individual neurons. Traditional recording methods, such as glass microelectrodes, can only control a small number of neurons. More recently, devices with high electrode density have been developed, but few of them can be used for intracellular recording or stimulation in intact nervous systems. Carbon fiber electrodes (CFEs) are 8 µm-diameter electrodes that can be assembled into dense arrays (pitches ⩾ 80 µm). They have good signal-to-noise ratios (SNRs) and provide stable extracellular recordings both acutely and chronically in neural tissue in vivo (e.g. rat motor cortex). The small fiber size suggests that arrays could be used for intracellular stimulation. Approach. We tested CFEs for intracellular stimulation using the large identified and electrically compact neurons of the marine mollusk Aplysia californica. Neuron cell bodies in Aplysia range from 30 µm to over 250 µm. We compared the efficacy of CFEs to glass microelectrodes by impaling the same neuron’s cell body with both electrodes and connecting them to a DC coupled amplifier. Main results. We observed that intracellular waveforms were essentially identical, but the amplitude and SNR in the CFE were lower than in the glass microelectrode. CFE arrays could record from 3 to 8 neurons simultaneously for many hours, and many of these recordings were intracellular, as shown by simultaneous glass microelectrode recordings. CFEs coated with platinum-iridium could stimulate and had stable impedances over many hours. CFEs not within neurons could record local extracellular activity. Despite the lower SNR, the CFEs could record synaptic potentials. CFEs were less sensitive to mechanical perturbations than glass microelectrodes. Significance. The ability to do stable multi-channel recording while stimulating and recording intracellularly make CFEs a powerful new technology for studying neural circuit dynamics.
A fast muon tagger method for Imaging Atmospheric Cherenkov Telescopes
Authors: Venere L Di , Giavitto G , Giordano F , López-Coto R , Pillera R 
Published: November 2021

Abstract
The Cherenkov Telescope Array (CTA) will be the next major observatory for Very High Energy gamma-ray astronomy. Its optical throughput calibration relies on muon Cherenkov rings. This work is aimed at developing a fast and efficient muon tagger at the camera level for the CTA telescopes. A novel technique to tag muons using the capabilities of silicon photomultiplier Compact High-Energy Camera CHEC-S, one of the design options for the camera of the small size telescopes, has been developed, studying and comparing different algorithms such as circle fitting with the Taubin method, machine learning using a neural network and simple pixel counting. Their performance in terms of efficiency and computation speed was investigated using simulations with varying levels of night sky background light. The application of the best performing method to the large size telescope camera has also been studied, to improve the speed of the muon preselection.
Critical Temperature in Zigzag Graphene Nanoribbon: a First-principles Study
Authors: Prayitno T B , Budi E 
Published: November 2021

Abstract
The critical (Néel) temperature in the zigzag graphene nanoribbon was calculated using the mean-eld approximation within the generalized Bloch theorem. This calculation was carried out over the Brillouin zone of the magnon spectrum. We found a nearly at magnon dispersion at the high energy in one-third of the Brillouin zone. Our calculation showed the critical temperature below room temperature, in good agreement with the prediction in the previous works. Our last work (Prayitno 2021 Physica E 129 114641) revealed that the critical temperature may be enhanced by increasing the ribbon width. In this brief report, we justified that the critical temperature becomes almost constant up to a certain ribbon width. This result indicates that the critical temperature in the graphene nanoribbon will never reach room temperature for any ribbon widths, thus it is likely difficult to apply pristine graphene nanoribbon in any practical devices working near room temperature.
The Role of Symmetry in Non-Hermitian Scattering1
Authors: Ruschhaupt Andreas , Simon Miguel A , Kiely Anthony , Gonzalo Muga J 
Published: November 2021

Abstract
We review recent work on asymmetric scattering by Non-Hermitian (NH) Hamiltonians. Quantum devices with an asymmetric scattering response to particles incident from right or left in effective ID waveguides will be important to develop quantum technologies. They act as microscopic equivalents of familiar macroscopic devices such as diodes, rectifiers, or valves. The symmetry of the underlying NH Hamiltonian leads to selection rules which restrict or allow asymmetric response. NH-symmetry operations may be organized into group structures that determine equivalences among operations once a symmetry is satisfied. The NH Hamiltonian posseses a particular symmetry if it is invariant with respect to the corresponding symmetry operation, which can be conveniently expressed by a unitary or antiunitary superoperator. A simple group is formed by eight symmetry operations, which include the ones for Parity-Time symmetry and Hermiticity as specific cases. The symmetries also determine the structure of poles and zeros of the S matrix. The ground-state potentials for two-level atoms crossing properly designed laser beams realize different NH symmetries to achieve transmission or reflection asymmetries.
Prediction of undrained shear strength and correlation in between soil parameters
Authors: Yimer Yimam Mohammed , Paul Makesh A. , Muhammed SalihaShukri 
Published: November 2021

Abstract
Correlation of soil parameters has undeniable benefit in the determination of engineering properties of soil to solve problems in geotechnical Engineering area. The tests were conducted within geotechnical laboratory. These tested soil parameters, used in the correlation analysis are unconfined compressive strength, bulk unit weight and dry unit weight. The aim of this study is proposing a relationship in between the strength parameter with some of the index properties of soils using statistical regression analysis. The linear regression analyses have been done for prediction of unconfined compressive strength (qu
) from bulk and dry unit weight as model-1 and model-2 respectively. And dry unit weight was predicted from bulk unit weight as model-3. Model-4 represents the multiple linear regression analysis to predict qu
. The health of developed models is measured by coefficient of determination (R
2) values. Though, model-1, model-2, model-3 and model-4 have R – squared values of 0.9112, 0.9333, 0.9109 and 0.9452 respectively. Therefore, they are correlated strongly and positively. The prediction of unconfined compressive strength of these soils correlated in linear regression, are fairly determined with Model-2 compared with model-1 and model-4 (MLR).
Mechanical and Physical Properties of Khaya senegalensis Solid Fuel Pellet with Different Binder Percentages
Authors: Binti Ismail Ras Izzati , Shaari Abd Razak , Yee Khor Chu , Mohamed Alina Rahayu , Abd Rahim Muhammad Syakirin Bin , Leng Lee Yit , Wan Draman Wan Nur A’Tiqah , Makhtar Nur Lailina , Razak Norawanis Abd , Jamalludin Mohd Riduan 
Published: November 2021

Abstract
The characteristics of the solid fuel pellets, such as its strength, durability and density can be used to assess its quality. During the transport and storage, pellets with low strength and durability produces dusts and ultimately resulting in equipment blockage, high pollution emissions, and an increased risk of fire and explosion. Therefore, pellet manufacturing process should be given priority to improve pellet quality. The use of binder in the production of pellets will aid in improving pellet quality. Therefore, this study investigates the influence of different binder percentages on the mechanical properties of K. senegelensis fuel pellets. Durability, unit density, bulk density and diametral compressive strength testing were carried out in compliance with international standards. It was discovered that pellets containing 4% cassava starch binder produces better results, particularly in terms of durability and compressive ldiametral strength.
Solidification characteristics in a spherical capsule integrated with pin fins and rectangular fins - a comparative study
Authors: Premnath D , Rodrigues Jestin Merril , Thakur Aashim 
Published: November 2021

Abstract
This study aims at investigating the solidification characteristics in a spherical capsule with pin fins and rectangular fins of same length and volume immersed in a constant temperature bath (-6°C, -9°C, -12°C). The fins are made of copper and are attached to the inner surface of the spherical capsule. The fin lengths correspond to the annulus fill volume margin of 75% taken on the inside wall of the spherical container. The findings showed that the overall solidification period of the capsules with rectangular fins was reduced. Also, the subcooling phenomena is completely eliminated at bath temperature of -6°C. Results also indicated that 50% PCM mass is reduced effectively with the provision of fins. Thus, with the employment of rectangular fins better potential energy savings can be attained when operated at partial charging mode at higher bath temperature.