bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sequential dependency for affective appraisal of food images
Authors: Van der Burg Erik , Toet Alexander , Abbasi Zahra , Brouwer Anne-Marie , Van Erp Jan B. F. , Kallen Victor L. , Kaneko Daisuke , Kim Youjin , Kinnear Marise , de Kock Henriëtte L. , Kusbiantari Dyah , Lee Tzong-Ru , Liu Yingxuan , Luhovyy Bohdan L. , MacEachern Emily , Mezgebe Abadi Gebre , Nikolova Rouja , Olatunde Ganiyat , Srisayekti Wilis , Tahir Muhammad Rizwan , Ushiama Shota , Yürek Merve Aslıhan 
Published: October 2021

AbstractHow we perceive the world is not solely determined by our experiences at a given moment in time, but also by what we have experienced in our immediate past. Here, we investigated whether such sequential effects influence the affective appraisal of food images. Participants from 16 different countries (N = 1278) watched a randomly presented sequence of 60 different food images and reported their affective appraisal of each image in terms of valence and arousal. For both measures, we conducted an inter-trial analysis, based on whether the rating on the preceding trial(s) was low or high. The analyses showed that valence and arousal ratings for a given food image are both assimilated towards the ratings on the previous trial (i.e., a positive serial dependence). For a given trial, the arousal rating depends on the arousal ratings up to three trials back. For valence, we observed a positive dependence for the immediately preceding trial only, while a negative (repulsive) dependence was present up to four trials back. These inter-trial effects were larger for males than for females, but independent of the participants’ BMI, age, and cultural background. The results of this exploratory study may be relevant for the design of websites of food delivery services and restaurant menus.
Temperature-dependent study on AlGaN-based deep ultraviolet light-emitting diode for the origin of high ideality factor
Authors: Liao Yanjun , Li Ding , Guo Qi , Liu Yufeng , Wang Haiming , Hu Weiguo , Wang Zhong Lin 
Published: October 2021

Deep ultraviolet light-emitting diodes (DUV LEDs) are promising light sources for disinfection, especially during the pandemic of novel coronavirus (COVID-19). Despite much effort in the development of DUV LEDs, the device temperature and ideality factor are key parameters of devices, which are often neglected. Here, we developed a simple and convenient method to study the behavior of a 280 nm AlGaN-based DUV LED, obtaining the electrical, optical, and thermal properties within one measurement. From the experimental results, we find that the light output power and wall-plug efficiency of the AlGaN-based DUV LED are strongly affected by device temperature, ideality factor (β), and series resistance (Rs). β decreases from 9.3 to 8.1 at 40 mA when the temperature increases from 302 to 317 K. We compared these results with simulations and found that the high potential barriers inside the device and the carrier concentration in n-type or p-type layers, especially the hole concentration in p-type layers, are the two key factors for the high value of the ideality factor from the LED structure. As the device temperature increases, carriers with higher energy would overcome some potential barriers and Mg acceptor activation would be more efficient, which are beneficial for carrier transportation. However, these also lead to the carrier overflow and weaken the radiative recombination rate. The trade-off role of device temperature in carriers between transportation and overflow is needed to be considered in the future development of DUV LEDs with higher efficiency and higher brightness.
Homoepitaxial β-Ga2O3 transparent conducting oxide with conductivity σ = 2323 S cm−1
Authors: Jeon Hyung Min , Leedy Kevin D. , Look David C. , Chang Celesta S. , Muller David A. , Badescu Stefan C. , Vasilyev Vladimir , Brown Jeff L. , Green Andrew J. , Chabak Kelson D. 
Published: October 2021

Conductive homoepitaxial Si-doped β-Ga2O3 films were fabricated by pulsed laser deposition with an as-deposited 2323 S cm−1 conductivity (resistivity = 4.3 × 10−4 Ω-cm, carrier concentration = 2.24 × 1020 cm−3, mobility = 64.5 cm2 V−1 s−1, and electrical activation efficiency = 77%). High quality homoepitaxial films deposited on commercial (010) Fe-compensated β-Ga2O substrates were determined by high-resolution transmission electron microscopy and x-ray diffraction. The β-Ga2O3 films have ∼70% transparency from 3.7 eV (335 nm) to 0.56 eV (2214 nm). The combination of high conductivity and transparency offers promise for numerous ultrawide bandgap electronics and optoelectronic applications.
Ozone destruction due to the recombination of oxygen atoms
Authors: Pershin Andrey A. , Torbin Aleksei P. , Mikheyev Paul A. , Kaiser Ralf I. , Mebel Alexander M. , Azyazov Valeriy N. 
Published: October 2021

Kinetics of ozone destruction due to the recombination of oxygen atoms produced by pulsed 266 nm laser photolysis of O3/M (M = CO2 and/or N2) mixtures was studied using the absorption and emission spectroscopy to follow time evolutions of O3 and electronically excited molecules O2* formed in the recombination process 2O(3P) + M → O2* + M. An unexpected high ozone destruction rate was observed when O2* was present in the system. The kinetic model developed for the oxygen nightglow on the terrestrial planets was adapted to interpret the detected temporal profiles of the ozone number density and the O2* emission intensities. It was deduced that the vibrationally excited singlet delta oxygen molecule O2(a1Δ, υ) formed in the secondary processes reacts efficiently with ozone in the process O2(a1Δ, υ ≥ 3) + O3 → 2O2 + O, and the rate constant of this process was estimated to be 3 × 10−11 cm3 s−1. Ab initio calculations at the CASPT2(14, 12)/cc-pVTZ/UωB97XD/cc-pVTZ level of theory were applied to find the reaction pathway from the reactants to products on the O5 potential energy surface. These calculations revealed that the O2(a1Δ) + O3 reaction is likely to proceed via singlet–triplet intersystem crossing exhibiting an energy barrier of 9.6 kcal/mol, which lies between two and three quanta of vibrational excitation of O2(a1Δ), and hence, O2(a1Δ, υ) with υ ≥ 3 could rapidly react with ozone.
Anharmonicity of optical phonon modes in copper doped rutile TiO2 nanorod composed microflowers
Authors: Sahoo Subhashree , Ghorai Gurupada , Ghosh Kalyan , Das Bidyadhar , Sikdar Mrinal K. , Sahoo Pratap K. 
Published: October 2021

Anharmonicity and impurities have a significant impact on the dynamic and optical properties of crystalline solids. In this report, we have performed temperature-dependent Raman spectroscopy in the range of 300–800 K for hydrothermally synthesized titanium dioxide (TiO2) nanorod composed microflowers doped with Cu. X-ray diffraction and high resolution transmission electron microscopy confirm the pure rutile phase of both pristine and Cu doped TiO2. The most intense Eg and A1g modes exhibit a frequency redshift, and the linewidth increases with temperature, which leads to Fano line shape type asymmetry. The anharmonicity induced phonon frequency shift as a function of temperature was well fitted using the Klemens model by combining three and four-phonon coupling processes. The Raman modes soften with the increasing concentration of Cu doping. The Cu dopant acts as an impurity, which manifests defect states to tune the bandgap and shorten the phonon lifetime and anharmonicity. Such an anharmonic effect can lead to applications in the sensing devices with suitable thermal and electrical conductivities.
Multiphoton-excited dynamics of the trans or cis structural isomer of 1,2-dibromoethylene
Authors: Kim Junggil , Kim Sang Kyu 
Published: October 2021

Photofragmentation dynamics of cis and trans isomers of 1,2-dibromoethylene (1,2-DBE) have been investigated by multiphoton excitation using a picosecond (ps) laser pulse. It has been found that the Br2+ product ion preferentially originates from the cis isomer rather than from trans. The Boltzmann-type isotropic low kinetic energy components of the Br+ and Br2+ product state distributions seem to be most likely from the unimolecular reactions of the vibrationally hot cationic ground state generated by the three-photon absorption at the photon energy below ∼38 000 cm−1. The highly anisotropic kinetic energy components of Br+ and Br2+ start to appear at the photon energy above ∼38 000 cm−1, where the Dn (n ≥ 1) − D0 transition is facilitated within the same ps laser pulse as the parent molecule is efficiently ionized by the two-photon absorption. The transition dipole moment of the D4 − D0 transition of the strongest oscillator strength has been theoretically predicted to be parallel to the C–Br bond or C=C bond axis for the trans or cis isomer, respectively. The fast anisotropic with the (β ∼ +2) component in the Br+ product distribution is thus likely from the trans isomer, whereas that of Br2+ (β ∼ −0.5) should be the consequence of the photodissociation of the cis isomer. The isomer-specific reactivity found here in the picosecond multiphoton excitation of 1,2-DBE provides a nice platform for the better understanding of the structure–reactivity relationship under the harsh condition of the strong or ultrashort optical field.
Linking species traits and demography to explain complex temperature responses across levels of organization
Authors: Wieczynski Daniel J. , Singla Pranav , Doan Adrian , Singleton Alexandra , Han Ze-Yi , Votzke Samantha , Yammine Andrea , Gibert Jean P. 
Published: October 2021

SignificanceMicrobes regulate nutrient flux and carbon storage within ecosystems, making them essential to the global carbon cycle and ecosystem responses to climate change. Understanding how climate change will alter microbial communities and how this will feed back to influence the pace of climate change requires linking processes across levels of organization, from individual organisms to whole ecosystems. We show that the physical characteristics (traits) of protist species influence how their populations will respond to changes in temperature. These species-level temperature responses also alter the composition, dynamics, and functioning of whole microbial communities. Using traits to understand how complex, multilevel microbial processes change with temperature can help us anticipate possible consequences of rapid global climate change.
Spontaneous helielectric nematic liquid crystals: Electric analog to helimagnets
Authors: Zhao Xiuhu , Zhou Junchen , Li Jinxing , Kougo Junichi , Wan Zhe , Huang Mingjun , Aya Satoshi 
Published: October 2021

Significance
The recent discovery of the emerging ferroelectric nematics opens an avenue not only for exploring exotic polar matter states in condensed matter physics but also for providing opportunities toward brand new liquid crystal technologies. Here, we revealed the existence of a helielectric nematic state by introducing the chirality into the ferroelectric nematics. Combining multiple intercorrelated measurements, we confirmed a helicoidal-type polar vector field in the helielectric nematics. The emergent polar symmetry triggers distinctions in topology to the dielectric cholesterics. Via proper doping of chiral generators, the helielectric state can survive down to room temperature, retaining excellent nonlinear optical and dielectric properties. Hence, it offers a stable material platform for exploring unidentified polarity–chirality–coupled textures and developing functional electrooptical devices.
A topic modeling analysis of Korea’s T&I research trends in the 2010s
Authors: Lee Changsoo 
Published: October 2021

AbstractThe present study aims to demonstrate the relevance of topic modeling as a new research tool for analyzing research trends in the T&I field. Until now, most efforts to this end have relied on manual classification based on pre-established typologies. This method is time- and labor-consuming, prone to subjective biases, and limited in describing a vast amount of research output. As a key component of text mining, topic modeling offers an efficient way of summarizing topic structure and trends over time in a collection of documents while being able to describe the entire system without having to rely on sampling. As a case study, the present paper applies the technique to analyzing a collection of abstracts from four Korean Language T&I journals for the 2010s decade (from 2010 to 2019). The analysis proves the technique to be highly successful in uncovering hidden topical structure and trends in the abstract corpus. The results are discussed along with implications of the technique for the T&I field.
Figurative language in multilingual students’ L2 Swedish – a usage-based perspective
Authors: Prentice Julia 
Published: October 2021

Abstract
The aim of the current paper is to reinterpret some results of two previous studies on the mastery of figurative
expressions from the perspective of usage-based linguistics. The reanalysis aims to shed more light on the learning and use of
figurative language by multilingual students by exploring the complex interplay of linguistic creativity, expressivity, and
conventionality in figurative expressions. The reinterpretation shows that many of the examples that were previously categorized
as novel figurative expressions used in students’ writing, can be analyzed as instances of regular patterns, i.e.
constructions, with certain lexical idiosyncrasies. Modifications of conventionalized figurative expressions are discussed and
reinterpreted in terms of strength of entrenchment of links between form and meaning within certain constructions or links between
constructions and conventionalized pragmatic information in the multilinguals’ mental construction. Implications for the treatment
of Swedish figurative expressions in the second language class room are, in line with previous research, that focusing on
regularity might reduce unpredictability, often seen as the core difficulty in the learning of such expressions in an L2. The
paper also offers some directions for further investigation of the socio-cognitive processes involved in the learning of
figurative language in an additional language.
Linear instability of elliptic rhombus solutions to the planar four-body problem
Authors: Liu Bowen 
Published: October 2021

Abstract
In this paper, we study the linear stability of the elliptic rhombus solutions, which are the Keplerian homographic solution with the rhombus central configurations in the classical planar four-body problems. Using ω-Maslov index theory and trace formula, we prove the linear instability of elliptic rhombus solutions if the shape parameter u and the eccentricity of the elliptic orbit e satisfy

(

u
,
e

)

∈

(

1
/

3

,

u

2

)

×

0
,

f

^

(

27

4

)

−
1
/
2

∪

(

u

2

,
1
/

u

2

)

×

0
,
1

∪

(

1
/

u

2

,

3

)

×

0
,

f

^

(

27

4

)

−
1
/
2

where u
2 ≈ 0.6633 and

f

^

(

27

4

)

−
1
/
2

≈
0.4454

. Motivated on numerical results of the linear stability to the elliptic Lagrangian solutions in Martínez et al (2006 J. Differ. Equ.
226 619–651), we further analytically prove the linear instability of elliptic rhombus solutions for

(

u
,
e

)

∈

(

1
/

3

,

3

)

×

0
,
1

.
Effect of shear thickening gel on structure and properties of flexible polyurethane foam
Authors: Liu Xiaoke , Yu Kejing , Sun Jie , Guo Wenwen , Qian Kun 
Published: October 2021

Abstract
Compression and low-velocity impact properties of shear thickening gel/polyurethane foam (STG/PUF), a soft protective material, have been reported. In order to have a deeper understanding of the relationship between the structure and properties of this material, we utilized Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Proton nuclear magnetic resonance (1H-NMR) to study and prove that STG and polyurethane (PU) did not produce new chemical bonds during the blending process, which belongs to physical blending. Because the molecular chains of STG and PU are intertwined, the composites are endowed with higher thermal stability, safety protection performance, and shape memory performance. For instance, Young’s modulus (E) of the STG/PUF was automatically increased by 57% when stimulated by external forces at different rates and the Emax
over 200 kPa, demonstrating a pronounced shear thickening effect. Shape memory tests showed that the shape fixity ratio of STG/PUF gradually increases with the increase of STG content, and the shape recovery ratio remained at 100%. More importantly, the STG/PUF was flexible and comfortable, had excellent mechanical properties and a longer service life, and can be extended to various human protective equipment.
Preparation of a small-size superconducting joint for C-doped 30-filament MgB2 wires
Authors: Xi Dan , Wang Dayou , Xinwei Cai , Wang Qingyang , Huang Zigeng , Nie Ruijuan , Yan Guo , Wang Furen , Gan Zizhao 
Published: October 2021

Abstract
A preparation method of a small-size MgB2 superconducting joint with 2.0 mm diameter for C-doped 30-filament MgB2 wires is presented in this paper. Herein, an unreacted in situ C-doped monofilament wire was utilized as the connecting structure, since it contains a low quantity of dense precursor which needs less pressure during fabrication, avoiding distortion of the multifilament in the parent wires, as shown in SEM images. After heat treatment, the formed C-doped MgB2 bulk with small volume in the joint has the ability to release heat quickly, resulting in good stability. The morphology of the joint proved the MgB2–MgB2 interface between the monofilament and 30-filament wire had been successfully connected. The joint sintered at 600 °C for 2 h shows an apparent superconducting transition with T
c-on = 33.49 K and has negligible resistance below 30.56 K as depicted in the R–T curve. It also has approximately 40% Jc
value of the parent 30-filament wire, at 4.2 K in 3 T.
Quasi-exactly solvable decatic model description of nuclei near the X(5) critical point
Authors: Sobhani Hadi , Hassanabadi Hassan , Bonatsos Dennis , Pan Feng , Draayer Jerry P 
Published: October 2021

Abstract
The Bohr Hamiltonian with axially deformed shape confined in a quasi-exactly solvable decatic β-part potential is studied. It is shown that the decatic model can well reproduce the X(5) model results as far as the energy ratios in the ground and beta band and related B(E2) values are concerned. Fitting results to the low-lying energy ratios and relevant B(E2) values of even–even X(5) candidates 150Nd, 156Dy, 164Yb, 168Hf, 174Yb, 176,178,180Os, and 188,190Os show that the decatic model provides the best fitting results for the energy ratios, while the X(5) model is the best at reproducing the B(E2) values of these nuclei, in which the beta-bandhead energy is lower than that of the gamma band. While for even–even nuclei, such as 154,156,158Gd, with bandhead energies of the beta and gamma bands more or less equal within the X(5) critical point to the axially deformed region, our numerical analysis indicates that the decatic model is better than the X(5) model in describing both the low-lying level energies and related B(E2) values.
Investigation of plasma wall interactions between tungsten plasma facing components and helium plasmas in the WEST tokamak
Authors: Tsitrone E. , Pegourie B. , Gunn J.P. , Bernard E. , Bruno V. , Corre Y. , Delpech L. , Diez M. , Douai D. , Ekedahl A. , Fedorczak N. , Gallo A. , Loarer T. , Vartanian S. , Gaspar J. , Le Bohec M. , Rigollet F. , Bisson R. , Brezinsek S. , Dittmar T. , De Temmerman G. , Hakola A. , Wauters T. , Balden M. , Mayer M. , WEST Team  
Published: October 2021

Abstract
ITER will operate with a tungsten divertor, a material featuring surface morphology changes when exposed to helium plasmas, in particular the formation of the so called tungsten fuzz under specific conditions. Investigating interactions between tungsten plasma facing components and helium plasmas in a tokamak environment is therefore a key point to consolidate predictions for the ITER divertor performance and lifetime. To this end, a dedicated helium campaign was performed in the full tungsten WEST tokamak, cumulating ∼2000 s of repetitive L mode discharges. It is shown that conditions for tungsten fuzz formation, as derived from linear devices experiments (incident helium energy E
inc > 20 eV, helium fluence >1024 He/m2, surface temperature T
surf > 700 °C), were met in the outer strike point (OSP) area of the inertially cooled tungsten divertor elements of WEST. Preliminary inspection of the components after the campaign did not show visible signs of surface modification, but points to significant net erosion in the OSP area. An extensive post mortem analysis is now ongoing to confirm these first indications. These results underline that the complex balance between erosion/redeposition (in particular linked to impurities) and tungsten fuzz formation needs to be taken into account in tokamak conditions.
Enabling peristalsis of human colon tumor organoids on microfluidic chips
Authors: Fang Guocheng , Lu Hongxu , Al-Nakashli Russul , Chapman Robert , Zhang Yingqi , Ju Lining Arnold , Lin Gungun , Stenzel Martina H , Jin Dayong 
Published: October 2021

Abstract
Peristalsis in the digestive tract is crucial to maintain physiological functions. It remains challenging to mimic the peristaltic microenvironment in gastrointestinal organoid culture. Here, we present a method to model the peristalsis for human colon tumor organoids on a microfluidic chip. The chip contains hundreds of lateral microwells and a surrounding pressure channel. Human colon tumor organoids growing in the microwell were cyclically contracted by pressure channel, mimicking the in vivo mechano-stimulus by intestinal muscles. The chip allows the control of peristalsis amplitude and rhythm and the high throughput culture of organoids simultaneously. By applying 8% amplitude with 8 ∼ 10 times min−1, we observed the enhanced expression of Lgr5 and Ki67. Moreover, ellipticine-loaded polymeric micelles showed reduced uptake in the organoids under peristalsis and resulted in compromised anti-tumor efficacy. The results indicate the importance of mechanical stimuli mimicking the physiological environment when using in vitro models to evaluate nanoparticles. This work provides a method for attaining more reliable and representative organoids models in nanomedicine.
Predicting Cohort-Specific Cervical Cancer Incidence From Population-Based Surveys of Human Papilloma Virus Prevalence: A Worldwide Study
Authors: Schulte-Frohlinde Rosa , Georges Damien , Clifford Gary M , Baussano Iacopo 
Published: October 2021

Abstract
Predictions of cervical cancer burden and the impact of measures taken to control this cancer are usually data-demanding and based on complex assumptions. We propose a predictive method (called PANDORA) based on human papillomavirus (HPV) prevalence, measured 1993–2008, and cervical cancer incidence (CCI), measured 1993–2012, in the same birth cohorts from different worldwide locations, informed by data on age at detection of high-risk HPV and sexual debut. The model can predict CCI among high-risk HPV–positive women and predict CCI up to 14 years following high-risk HPV detection. We found CCI to increase during the 14 years following high-risk HPV detection in unscreened women aged &lt;35 years but to remain mainly constant among women ≥35 years. Age at sexual debut was a significant modifier of CCI. Using our model, we accurately reproduced CCI among high-risk HPV–positive women as observed in cohort studies and in the general population of multiple countries. We also predicted the annual number of cervical cancer cases and CCI in locations with HPV prevalence data but no cancer registry. These findings could inform cervical cancer control programs in settings without cancer registries, as they can be used to predict future cervical cancer burden from population-based surveys of HPV prevalence.