bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Dosage-Dependent Effects of Cytostatic Drugs Using a Fibroblast Cell Culture of the Human Nasal Mucosa
Authors: Yartsev Vasily , Gabashvili Anna , Atkova Eugenia , Melnikov Pavel , Nesterova Tatiana
Published: January 2020

Introduction Knowing a concentration at which cytostatic drugs are toxic for the nasal fibroblasts will enable the use cytostatic drugs in the clinical practice to prevent excessive cicatrization.

Objective To determine the cytostatic concentrations of mitomycin С, doxorubicin, and 5-fluorouracil affecting nasal mucosa fibroblasts.

Methods We obtained material during an endonasal dacryocystorhinostomy with the patient's informed consent. The cells were cultivated. Second- to fourth-passage cells were used in the experiments. The cells were stained for vimentin and cluster of differentiation 90 (CD90). An MTS test 3 (3-(4,5-dimethylthiazole-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium); cell viability test was performed.

Results The cytostatic drugs have a toxic effect on cultivated fibroblasts of the nasal mucosa. This effect is dose-dependent. In terms of reducing the level of tissue fibrotisation in the nasal cavity, the most justified approach is to carry out an experimental study of the effect of mitomycin C, doxorubicin, and 5-fluorouracil at the concentrations of 0.25 mg/ml, 0.25 mg/ml, and 12.5 mg/ml respectively.

Conclusion The authors argue that it is inappropriate to use these cytostatic drugs to conduct studies with the goal of analyzing their antifibrotic effect on the nasal mucosa at concentrations that are either lower or higher than the aforementioned ones.
Well-Being of Caregivers of Patients with Laryngeal Cancer Treated by Radiotherapy
Authors: Karlsson Therese , Johansson Mia , Finizia Caterina
Published: January 2020

Introduction Laryngeal cancer is the second most common head and neck cancer, but no study to date reports exclusively on the well-being of the caregivers of patients with laryngeal cancer treated by radiotherapy.

Objective The present prospective pilot study aims to describe the impact of the work on the well-being of the caregivers of patients with laryngeal cancer.

Methods The caregivers of patients undergoing radiotherapy with curative intent for laryngeal cancer were included in the present study, and they were asked to fill out a specific questionnaire, while the patients filled out the Hospital Anxiety and Depression Scale (HADS) following diagnosis but prior to treatment.

Results A total of 50 caregivers were included, 20% of which were male, and 80%, female. In total, 62% (n = 31) of the caregivers were spouses, while the remaining were daughters/sons (n = 11; 22%), siblings (n = 6; 12%), or they were classified as “other” (n = 2; 4%). The female caregivers scored lower (worse) on the depression/worry domain, and this was statistically significant (p = 0.047); they also reported a statistically significant higher negative impact on employment (p = 0.011) compared with the male caregivers. In general, the caregivers of patients with late-stage tumors tended to report lower (worse) scores on all domains (except hospital contact) compared with the caregivers of patients with early-stage tumors. No other differences were observed regarding the patients' age, gender, tumor site or their HADS score.

Conclusion The diagnosis and treatment of laryngeal cancer impacts the caregiver's psychological well-being, particularly that of female caregivers. This should be taken into consideration when the patients begin the hospital treatment pathway. However, larger studies are needed to target resources more appropriately.
Improving the Speed of MRI with Artificial Intelligence
Authors: Johnson Patricia M. , Recht Michael P. , Knoll Florian
Published: January 2020

Magnetic resonance imaging (MRI) is a leading image modality for the assessment of musculoskeletal (MSK) injuries and disorders. A significant drawback, however, is the lengthy data acquisition. This issue has motivated the development of methods to improve the speed of MRI. The field of artificial intelligence (AI) for accelerated MRI, although in its infancy, has seen tremendous progress over the past 3 years. Promising approaches include deep learning methods for reconstructing undersampled MRI data and generating high-resolution from low-resolution data. Preliminary studies show the promise of the variational network, a state-of-the-art technique, to generalize to many different anatomical regions and achieve comparable diagnostic accuracy as conventional methods. This article discusses the state-of-the-art methods, considerations for clinical applicability, followed by future perspectives for the field.
Improving the efficiency of a hollow ultrasonic motor by optimizing the stator’s effective electromechanical coupling coefficient
Authors: Liu Jun , Niu Ruikun , Zhu Hua , Zhao Chunsheng
Published: January 2020

For application in control moment gyros, we considered a hollow traveling wave ultrasonic motor with a diameter of 70 mm. The effective electromechanical coupling coefficient (EMCC) of the stator was determined. The influence of the vibration mode of the stator and the structural dimensions of the metal elastomer and piezoelectric ceramic ring on the effective EMCC was investigated. According to the FEM simulation results, four different stators were manufactured and tested. The EMCC obtained through the simulations was greater than the measured values, with the lowest simulated and measured values being 17.202% and 16.431%, respectively, and the highest simulated and measured values being 28.452% and 26.780%, respectively. The relative errors between the simulated and measured values were all less than 10%. This work will help us to improve the output efficiency of the motor.
Instant hydrogen production using Ga-In-Sn-Bi alloy-activated Al-water reaction for hydrogen fuel cells
Authors: Xu Shuo , Cui Yuntao , Yang Lixiang , Liu Jing
Published: January 2020

Room temperature liquid metal activated Al-H2O reaction is a valuable method of achieving controllable, instant hydrogen generation. It avoids problems related to degradation of raw materials. In this study, the Ga-In-Sn-Bi alloy-activated Al-H2O reaction was demonstrated to be rate-stable with a hydrogen productivity of 92% and therefore superior to similar reactions activated by Ga-In and Ga-In-Sn alloys. To reveal the relevant activation mechanisms, the electrode potentials of three types of liquid metal alloys were tested. The effects of various liquid metal alloy compositions on hydrogen generation performance were determined via composition analysis and elemental characterization of the used reaction materials. The effects of several reaction conditions on hydrogen generation performance were evaluated. The reaction activation energy and by-product separation were also studied. It is feasible to provide a stable supply of hydrogen to a fuel cell and produce an output power of 0.73 W using a 3 g Al plate. Overall, the room-temperature Ga-In-Sn-Bi alloy-activated Al-H2O reaction can achieve real-time, on-demand hydrogen generation. This makes it a preferred choice to supply hydrogen to fuel cells.
Molecular dynamics simulations of the effect of dislocations on the thermal conductivity of iron
Authors: Sun Yandong , Zhou Yanguang , Han Jian , Hu Ming , Xu Ben , Liu Wei
Published: January 2020

Phonons contribute an appreciable proportion of the thermal conductivity of iron-based structural materials used in the nuclear industry. The decrease in thermal conductivity caused by defects such as dislocations will decrease the efficiency of nuclear reactors or lead to melting failure under transient heat flow. However, the phonon–dislocation scattering rate in iron is unknown, and the details of the scattering process have not been well studied. In this paper, the effect of dislocations on lattice thermal conductivity in pure iron is studied using molecular dynamics simulations. The temperature distribution in the neighborhood of the dislocation, the spectral heat flux, and the frequency-dependent phonon mean free paths are obtained. From a comparison with the results for a perfect crystal, we find that the dislocation can significantly decrease the lattice thermal conductivity. By using an average phonon group velocity, the phonon–dislocation scattering rate under a given dislocation density is obtained from the phonon mean free paths. Moreover, eigenmode analysis of a dislocation dipole model indicates that the phonons have a certain degree of localization, which reduces their ability to transport heat. Our study reveals the details of the phonon–dislocation scattering process and may help to interpret the reduced thermal conductivity caused by the dislocations that are generated during the service lives of iron-based structural materials.
Resolution enhancement of transmission electron microscopy by super-resolution radial fluctuations
Authors: Zhang Y. , Rouvimov S. , Yuan X. , Gonzalez-Serrano K. , Seabaugh A. C. , Howard S. S.
Published: January 2020

Super-resolution fluorescence microscopy techniques have enabled dramatic development in modern biology due to their capability to discern features smaller than the diffraction limit of light. Recently, super-resolution radial fluctuations (SRRF), an analytical approach that is capable of generating super-resolution images easily without the need for specialized hardware or photoswitchable fluorophores, has been presented. While SRRF has only been demonstrated on fluorescence microscopes, in principle, this method can be used to generate super-resolution images on any imaging platforms with intrinsic radial symmetric point spread functions. In this work, we show that SRRF can be utilized to enhance the resolution and quality of transmission electron microscopy (TEM) images. By including an image registration algorithm to correct for sample drift, the SRRF-TEM approach substantially enhances the resolution of TEM images of three different samples acquired with a commercial TEM system. We quantify the resolution improvement in SRRF-TEM and evaluate how SRRF parameters affect the resolution and quality of SRRF-TEM results.
Development of a low energy small electron gun to study electron transport in hydrogen negative ion source plasmas
Authors: Matsumoto Yoshikatsu , Kisaki Masashi , Shinto Katsuhiro , Nakano Haruhisa , Sasao Mamiko , Wada Motoi
Published: January 2020

We developed a small-size electron gun capable of producing electrons with kinetic energy less than few tens of eV to investigate the slowing down and transport mechanisms of electrons in hydrogen negative ion source plasmas. The maximum extractable beam current density reached 36 μA/cm2 for 1 eV beam energy in a preliminary experiment. Although the present electron current density is still insufficient compared with our target value, 1 mA/cm2, we have found some hints to realize larger beam current density from the electron gun through this study. The measured beam profile along the electron beam axis has shown that the electron beam could travel approximately 7 mm from the electron gun in vacuum. The Particle-In-Cell (PIC) simulation explained the measured beam profile well and indicated that the electron beam has an energy spread as small as 0.1 eV compared to the 1 eV mean energy. The PIC simulation showed a discrepancy from the measurement in the dependence of the electron beam current on the beam extraction voltage of the electron gun. It implies that we should introduce a more realistic filament structure inside the electron gun in the PIC simulation in order to study the transport of low energy electrons more precisely.
Mechanical analysis of the contact interface of standing-wave linear piezoelectric driver
Authors: Fan Pingqing , Zhou Keshuai
Published: January 2020

The contact mechanics model between the stator and the slider of a standing-wave linear piezoelectric driver is established. On the basis of the momentum conservation law, the relation equation between the dynamic contact force and the preload in a period is obtained. Then, the normal contact and tangential friction forces are studied. Considering the gravity of the slider and friction from the guider, the dynamic equations of the slider are established under the start–stop phase, and the effects of the driver parameters on the start–stop characteristics are investigated. The contact models in the steady phase of the driver are derived, and a series of operational characteristics of the driver performance is simulated. Finally, a test is conducted and the analysis results of the validity of the contact model are presented. The contact model is important because it not only helps in predicting and evaluating the performance of the piezoelectric driver but also contributes to the design of these types of drivers.
Feasibility study of a compact neutron resonance transmission analysis instrument
Authors: Engel Ezra M. , Klein Ethan A. , Danagoulian Areg
Published: January 2020

Neutron Resonance Transmission Analysis (NRTA) uses resonant absorption of neutrons to infer the absolute isotopic composition of a target object, enabling applications in a broad range of fields such as archeology, enrichment analysis of nuclear fuel, and arms control treaty verification. In the past, NRTA involved large user facilities and complex detector systems. However, recent advances in the intensity of compact neutron sources have made compact neutron imaging designs increasingly feasible. This work describes the Monte Carlo (MC) based design of a compact epithermal NRTA radiographic instrument, which uses a moderated, compact deuterium-tritium neutron source and an epithermal neutron detector. Such an instrument would have a wide range of applications and would be especially impactful for scenarios such as nuclear inspection and arms control verification exercises, where system complexity and mobility may be of critical importance. The MC simulations presented in this work demonstrate accurate time-of-flight reconstructions for transmitted neutron energies, capable of differentiating isotopic compositions of nuclear material with high levels of accuracy. A new generation of miniaturized and increasingly more intense neutron sources will allow this technique to achieve measurements with greater precision and speed, with significant impact on a variety of engineering and societal problems.
Time dependent response of thixotropic systems: Insights from small amplitude oscillatory shear
Authors: Ramya Koduvayur A. , Srinivasan Ramanathan , Deshpande Abhijit P.
Published: January 2020

Thixotropic materials belong to the important class of time dependent, evolving, and aging systems. Their characteristics are currently understood through rheological measurements of steady and step shear wherein the steady states reached at large deformations and the transition from one steady state to another are monitored. Small deformation protocols are not well explored for such systems. This is contrary to the common approach of probing equilibrium state and small perturbations from the equilibrium state initially by focusing on linear viscoelasticity. This work addresses the question of how to understand thixotropic materials by focusing on both the small and large deformations. A model suspension of fumed silica in polyisobutylene/paraffin oil is characterized using steady shear, transient shear, and oscillatory shear rheology. The physical processes occurring due to structural changes during each of the tests are interpreted from the corresponding response. Several structural kinetics and elastoplastic/viscoelastic phenomenological models are evaluated, and a novel combination of models is proposed to obtain the description of the responses to various tests. The advantage of this strategy is highlighted in terms of possible difference in the mechanisms at small and large deformations. Kramers–Kronig relations are used to examine the experimental and simulated dataset obtained from oscillatory shear to identify possible violation of linearity or time independence. We demonstrate that the analysis of the oscillatory response using Kramers–Kronig relations leads to important insights about these systems.
Lessons from intramolecular singlet fission with covalently bound chromophores
Authors: Korovina Nadezhda V. , Pompetti Nicholas F. , Johnson Justin C.
Published: January 2020

Molecular dimers, oligomers, and polymers are versatile components in photophysical and optoelectronic architectures that could impact a variety of applications. We present a perspective on such systems in the field of singlet fission, which effectively multiplies excitons and produces a unique excited state species, the triplet pair. The choice of chromophore and the nature of the attachment between units, both geometrical and chemical, play a defining role in the dynamical scheme that evolves upon photoexcitation. Specific final outcomes (e.g., separated and uncorrelated triplet pairs) are being sought through rational design of covalently bound chromophore architectures built with guidance from recent fundamental studies that correlate structure with excited state population flow kinetics.
The effects of shape and mass fraction of nano-SiO2 on thermomechanical properties of nano-SiO2/DGEBA/MTHPA composites: A molecular dynamics simulation study
Authors: Fu Kexin , Lü Fangcheng , Xie Qing , Ruan Haoou , Yang Xinyu , Liang Shaodong
Published: January 2020

The doping of nano-SiO2 filler is one of the main methods of improving the thermomechanical properties of epoxy resin (EP) composite insulating materials, and the characteristics of the filler is one of the important factors affecting the modification effect. In this paper, the effects of the shape and mass fraction of nano-SiO2 particles on the microstructure and thermomechanical properties of EP composites were studied by molecular dynamics simulation. The results show that the bonding energy (EBinding) between the spherical SiO2 filler and matrix is the largest, and the fraction free volume (FFV) and the mean square displacement (MSD) of the composite model are the lowest. With the increase of the filler mass fraction, the EBinding between the filler and matrix changed little, whereas both FFV and MSD showed a monotonous downward trend. The introduction of nano-SiO2 fillers can significantly improve the thermomechanical properties of the composites. The shape of the filler has little effect on the glass transition temperature (Tg), coefficient of thermal expansion (CTE), and mechanical properties of the composites. Increasing the mass fraction of the filler can obviously improve the modification effect. When the mass fraction of SiO2 is 15 wt. %, the Tg of the material increased by about 35 K, the glass state CTE decreased by about 35%, and the Young’s modulus and shear modulus increased by 24.56% and 32.45%, respectively.
Optically levitated microsphere can act as a non-ionizing pressure gauge
Authors: Bandari Anashe
Published: January 2020

The relationship between a dielectric particle’s dynamics and the gas pressure surrounding it determines vacuum properties.
Anomerisation of Fluorinated Sugars by Mutarotase Studied Using 19F NMR Two-Dimensional Exchange Spectroscopy
Authors: Shishmarev Dmitry , Quiquempoix Lucas , Fontenelle Clément Q. , Linclau Bruno , Kuchel Philip W.
Published: January 2020

Five 19F-substituted glucose analogues were used to probe the activity and mechanism of the enzyme mutarotase by using magnetisation-exchange NMR spectroscopy. The sugars (2-fluoro-2-deoxy-d-glucose, FDG2; 3-fluoro-3-deoxy-d-glucose, FDG3; 4-fluoro-4-deoxy-d-glucose, FDG4; 2,3-difluoro-2,3-dideoxy-d-glucose, FDG23; and 2,2,3,3-tetrafluoro-2,3-dideoxy-d-glucose (2,3-dideoxy-2,2,3,3-tetrafluoro-d-erythro-hexopyranose), FDG2233) showed separate 19F NMR spectroscopic resonances from their respective α- and β-anomers, thus allowing two-dimensional exchange spectroscopy measurements of the anomeric interconversion at equilibrium, on the time scale of a few seconds. Mutarotase catalysed the rapid exchange between the anomers of FDG4, but not the other four sugars. This finding, combined with previous work identifying the mechanism of the anomerisation by mutarotase, suggests that the rotation around the C1–C2 bond of the pyranose ring is the rate-limiting reaction step. In addition to d-glucose itself, it was shown that all other fluorinated sugars inhibited the FDG4 anomerisation, with the tetrafluorinated FDG2233 being the most potent inhibitor. Inhibition of mutarotase by F-sugars paves the way for the development of novel fluorinated compounds that are able to affect the activity of this enzyme invitro and invivo.
Market integration accounts for local variation in generalized altruism in a nationwide lost-letter experiment
Authors: Baldassarri Delia
Published: January 2020

What explains variation in levels of prosocial behavior across communities? And are members of the ingroup and outgroup treated differently? According to evolutionary theories of generalized altruism, market integration should lead to greater levels of prosociality: Market exchange forces people to interact with unknown others, thus creating the conditions for the extension of prosocial behavior beyond close-knit circles to include outgroup members and strangers. Moving away from the evolutionary focus on cross-cultural variation, this article uses the market-integration hypothesis to explain intracultural variation in levels of prosociality in an advanced society. Taking advantage of an ideal setting, this study reports results from a large-scale, nationwide lost-letter experiment in which 5,980 letters were dispersed in a sample of 188 Italian communities. The study confirms the relevance of market integration in accounting for differences in levels of prosociality: In areas where market exchange is dominant, return rates are high. It also casts a light on the relationship between ingroup and outgroup prosociality: Return rates for both Italian and foreign recipients are the same; they vary together; and ingroup returns are highly predictive of outgroup returns at the community level.
Orchestration of human macrophage NLRP3 inflammasome activation by
Staphylococcus aureus
extracellular vesicles
Authors: Wang Xiaogang , Eagen William J. , Lee Jean C.
Published: January 2020

Release of extracellular vesicles (EVs) is a common feature among eukaryotes, archaea, and bacteria. However, the biogenesis and downstream biological effects of EVs released from gram-positive bacteria remain poorly characterized. Here, we report that EVs purified from a community-associated methicillin-resistant
Staphylococcus aureus
strain were internalized into human macrophages in vitro and that this process was blocked by inhibition of the dynamin-dependent endocytic pathway. Human macrophages responded to
S. aureus
EVs by TLR2 signaling and activation of NLRP3 inflammasomes through K
+
efflux, leading to the recruitment of ASC and activation of caspase-1. Cleavage of pro–interleukin (IL)-1β, pro-IL-18, and gasdermin-D by activated caspase-1 resulted in the cellular release of the mature cytokines IL-1β and IL-18 and induction of pyroptosis. Consistent with this result, a dose-dependent cytokine response was detected in the extracellular fluids of mice challenged intraperitoneally with
S. aureus
EVs. Pore-forming toxins associated with
S. aureus
EVs were critical for NLRP3-dependent caspase-1 activation of human macrophages, but not for TLR2 signaling. In contrast, EV-associated lipoproteins not only mediated TLR2 signaling to initiate the priming step of NLRP3 activation but also modulated EV biogenesis and the toxin content of EVs, resulting in alterations in IL-1β, IL-18, and caspase-1 activity. Collectively, our study describes mechanisms by which
S. aureus
EVs induce inflammasome activation and reveals an unexpected role of staphylococcal lipoproteins in EV biogenesis. EVs may serve as a novel secretory pathway for
S. aureus
to transport protected cargo in a concentrated form to host cells during infections to modulate cellular functions.
Observation of an apparent first-order glass transition in ultrafragile Pt–Cu–P bulk metallic glasses
Authors: Na Jong H. , Corona Sydney L. , Hoff Andrew , Johnson William L.
Published: January 2020

Significance

The glass transition is ubiquitous among materials and is commonly characterized by the rapid kinetic arrest of atomic or molecular rearrangements in a liquid as temperature is lowered. The possible existence of an underlying thermodynamic phase transition has been a subject of continuing debate. Here, we present compelling evidence that the glass transition evolves into a first-order melting transition in the limit of very high-fragility metallic glass-forming liquids. These Pt-rich glasses melt in a discontinuous manner similar to melting of a crystal.
The Nernst effect in Corbino geometry
Authors: Kavokin A. V. , Altshuler B. L. , Sharapov S. G. , Grigoryev P. S. , Varlamov A. A.
Published: January 2020

Significance

The Nernst effect consists in the induction of an electric current by a combined effect of the external magnetic field and the temperature gradient. We consider a Corbino disk geometry, where the temperature difference is applied between the outer and inner edges of the disk, while the magnetic field is perpendicular to the plane of the disk. We show that the circular diamagnetic currents flowing along the edges of the disk are the oscillatory functions of the filling factor of Landau levels of the electron gas in the disk. The Corbino geometry offers a unique opportunity for observation of the magnetization currents that have a purely thermodynamic nature, e.g., are independent of the conductivity of the sample.
Central clock components modulate plant shade avoidance by directly repressing transcriptional activation activity of PIF proteins
Authors: Zhang Yu , Pfeiffer Anne , Tepperman James M. , Dalton-Roesler Jutta , Leivar Pablo , Gonzalez Grandio Eduardo , Quail Peter H.
Published: January 2020

Light-environment signals, sensed by plant phytochrome photoreceptors, are transduced to target genes through direct regulation of PHYTOCHROME-INTERACTING FACTOR (PIF) transcription factor abundance and activity. Previous genome-wide DNA-binding and expression analysis has identified a set of genes that are direct targets of PIF transcriptional regulation. However, quantitative analysis of promoter occupancy versus expression level has suggested that unknown “trans factors” modulate the intrinsic transcriptional activation activity of DNA-bound PIF proteins. Here, using computational analysis of published data, we have identified PSEUDO-RESPONSE REGULATORS (PRR5 and PRR7) as displaying a high frequency of colocalization with the PIF proteins at their binding sites in the promoters of PIF Direct Target Genes (DTGs). We show that the PRRs function to suppress PIF-stimulated growth in the light and vegetative shade and that they repress the rapid PIF-induced expression of PIF-DTGs triggered by exposure to shade. The repressive action of the PRRs on both growth and DTG expression requires the PIFs, indicating direct action on PIF activity, rather than a parallel antagonistic pathway. Protein interaction assays indicate that the PRRs exert their repressive activity by binding directly to the PIF proteins in the nucleus. These findings support the conclusion that the PRRs function as direct outputs from the core circadian oscillator to regulate the expression of PIF-DTGs through modulation of PIF transcriptional activation activity, thus expanding the roles of the multifunctional PIF-signaling hub.
High-complexity extracellular barcoding using a viral hemagglutinin
Authors: Mullokandov Gavriel , Vijayakumar Gayathri , Leon Paul , Henry Carole , Wilson Patrick C. , Krammer Florian , Palese Peter , Brown Brian D.
Published: January 2020

While single-cell sequencing technologies have revealed tissue heterogeneity, resolving mixed cellular libraries into cellular clones is essential for many pooled screens and clonal lineage tracing. Fluorescent proteins are limited in number, while DNA barcodes can only be read after cell lysis. To overcome these limitations, we used influenza virus hemagglutinins to engineer a genetically encoded cell-surface protein barcoding system. Using antibodies paired to hemagglutinins carrying combinations of escape mutations, we developed an exponential protein barcoding system which can label 128 clones using seven antibodies. This study provides a proof of principle for a strategy to create protein-level cell barcodes that can be used in vivo in mice to track clonal populations.
Adaptation of gymnastics terms from English into Serbian
Authors: Milić Mira , Kardoš Aleksandra
Published: January 2020

Within the framework of an ever-increasing influx of English-based sports terms into Serbian, the paper will elucidate certain issues related to the actual and recommended adaptation of gymnastics terms in everyday use, as a contribution toA New English-Serbian Dictionary of Sports Terms. The analysis is based on a corpus of approximately 600 gymnastics terms in English and Serbian, compiled from official texts. The terms are critically examined from the perspective of adaptation of English units into the system of Serbian, at the level of content and form. Accordingly, the analysis will focus on the applied translation procedures and the method of transliteration. Given that the existing gymnastics terminology in Serbian includes numerous poly-lexical and poly-morphemic units, some of which do not comply with the linguistic standard of Serbian, the actual terms in use are also critically examined from the aspect of terminological standardization. This overview will thus be followed by a proposal for ways to standardize gymnastics terms in compliance with the model implemented in the existing English-Serbian dictionary of sports terms (Englesko-srpski rečnik sportskih termina) published in2006.
Evolution of cooperation with individual diversity on interdependent weighted networks
Authors: Liu Sicheng , Zhang Lin , Wang Baokui
Published: January 2020

The social networks as a complex set of networks fully reflect internal relations of individual interactions between them. Individual as an integral part of networks can show different functions under different levels. In the vast majority of current research realm of spatial evolutionary game, individuals who are often treated as identical peers interact with the local neighbours on a single, isolated same network, even the independent networks extended the content of spatial reciprocity. However, the individual diversity, including gender, wealth and social status and so on, usually is presented within the population. Individual heterogeneity impacts on the evolution of cooperation amongst selfish individuals. With this motivation, here we consider that two forms including Prisoner’s Dilemma (PD) and Snowdrift Game (SG) take place on interdependent weighted networks via the mixed-coupling in which individuals participate in different networks of interactions, cooperative behaviour can be maintained. Remarkably, the numerical analysis shows that, as the network interdependence considering individual diversity increases, cooperation thrives on one network joining in PD, the other engaging in SG may be plagued by defectors. Meanwhile, there exists an optimal region of mixed-coupling between networks to persist in cooperation of one network. Furthermore, individual diversity may be a link between non-trivial systems across the network connection, thus probing in how to schedule heterogeneous competitive tasks and services in complex manufacturing systems.
Predictions of

transitions *
Authors: Chen Yun-Hua
Published: January 2020

We study the contributions of intermediate bottomonium-like

states and the bottom meson loops in the heavy quark spin flip transitions

. Depending on the constructive or destructive interferences between the

-exchange and the bottom meson loops mechanisms, we predict two possible branching ratios for each process: BR

or

, and

or

. The contribution of the bottom meson loops is found to be considerably larger than that of the

-exchange in the

transitions, while its decay rates are not comparable to those of heavy quark spin conserved

processes. We also predict the contribution of the charm meson loops in the branch fractions of

.
Semileptonic decays

in the “PQCD+Lattice” approach *
Authors: Hu Xue-Qing , Jin Su-Ping , Xiao Zhen-Jun
Published: January 2020

We study the semileptonic decays

using the PQCD factorization approach with the newly defined distribution amplitudes of the

meson and a new kind of parametrization for extrapolating the form factors which takes into account the recent lattice QCD results. We find the following main results: (a) the PQCD predictions of the branching ratios of the

decays are smaller by about 5%-16% when the lattice results are taken into account in the extrapolation of the relevant form factors; (b) the PQCD predictions of the ratio

and of the longitudinal polarization

are

,

and

; and (c) after including the lattice results, the theoretical predictions slightly change:

,

,

and

. The theoretical predictions of

agree with the measurements within the errors. The other predictions could be tested by the LHCb experiment in the near future.
Production and constraints for a massive dark photon at electron-positron colliders *
Authors: Jiang Jun , Li Chun-Yuan , Li Shi-Yuan , Pathak Shankar Dayal , Si Zong-Guo , Yang Xing-Hua
Published: January 2020

Dark sector may couple to the Standard Model via one or more mediator particles. We discuss two types of mediators: the dark photon

and the dark scalar mediator

. The total cross-sections and various differential distributions of the processes

and

(

and b quarks) are discussed. We focus on the study of the invisible

due to the cleaner background at future

colliders. It is found that the kinematic distributions of the two-jet system could be used to identify (or exclude) the dark photon and the dark scalar mediator, as well as to distinguish between them. We further study the possibility of a search for dark photons at a future CEPC experiment with

GeV and 240 GeV. With CEPC running at

91.2 GeV, it would be possible to perform a decisive measurement of the dark photon (20 GeV

60 GeV) in less than one operating year. The lower limits of the integrated luminosity for the significance

2

, 3

and 5

are presented.
The

tetraquark states and the structure of X(2239) observed by the BESIII collaboration *
Authors: Lü Qi-Fang , Wang Kai-Lei , Dong Yu-Bing
Published: January 2020

We investigate the mass spectrum of the

tetraquark states in the relativized quark model. By solving the Schrödinger-like equation with the relativized potential, the masses of S- and P-wave

tetraquarks are obtained. The screening effects are also taken into account. It is found that the resonant structure

observed in the

process by the BESIII collaboration can be assigned as a P-wave

tetraquark state. Furthermore, the radiative transition and the strong decay behavior of this structure are also estimated, which can provide helpful information for future experimental searches.
quasibound state instead of ΛΛnn bound state *
Authors: Garcilazo H. , Valcarce A. , Vijande J.
Published: January 2020

The coupled

system was studied to investigate whether the inclusion of channel coupling is able to bind the

system. We use a separable potential three-body model of the coupled

system and a variational four-body calculation with realistic interactions. Our results exclude the possibility of a

bound state by a large margin. Instead, we found a

quasibound state above the

threshold.
Jet charge in high-energy nuclear collisions *
Authors: Chen Shi-Yong , Zhang Ben-Wei , Wang Enke
Published: January 2020

The averaged jet charge characterizes the electric charge of the initiating parton and provides a powerful tool to distinguish quark jets from gluon jets. We predict, for the first time, the medium modification of the averaged jet charge in the heavy-ion collisions at the LHC, where jet productions in p+p collisions are simulated by PYTHIA6, and the parton energy loss in QGP is calculated with two Monte Carlo models of jet quenching: PYQUEN and JEWEL. We found that the distribution of averaged jet charge is significantly suppressed by initial state isospin effects due to the participation of neutrons with zero electric charge during nuclear collisions. The considerable enhancement of the averaged jet charge in central Pb+Pb collisions is observed relative to peripheral collisions, since the jet quenching effect is more pronounced in central collisions. The distinct feature of the averaged jet charge between quark and gluon jets, along with the sensitivity of medium modifications on the jet charge to flavor dependence of the parton energy loss, could be very useful to discriminate the energy loss pattern between quark and gluon jets in heavy-ion collisions.
Synthesis of polyaniline by chemical oxidative polymerization and characteristic of conductivity and reflection for various strong acid dopants
Authors: Prasutiyo Y J , Manaf A , Hafizah M A E
Published: January 2020

Herein, polyaniline (PANI) is synthesized via chemical oxidative polymerization of aniline monomer with ammonium persulfate as initiator by maintaining the flow rate and stirring for 8 h at room temperature. Particle sizes up to 54.716 μm are obtained, with a viscosity reaching 1.87 mPa-s at 270 min. The highest temperature during polymerization was 32 °C at 210 min. Thus, the polymer molecules undergo propagating process to form polymer chains. Fourier transform infrared spectroscopy confirms the presence of the PANI molecule, which reveals a complete reaction when the double-bond peak at 3442 cm−1 disappears from the spectrum and new peaks appear corresponding to benzoic and quinoid molecules at 1300-1600 cm−1. This ensures that all aniline molecules are converted to PANI with no residual. We conclude that PANI is synthesized via oxidative polymerization. The electrical conductivity of PANI is driven by protonic acids. The conductivity increases upon adding protonic acids as a strong acid-doping agent. Thus, PANI-HClO4 exhibits best conductivity. The best material candidate for a microwave-absorbing material is thus PANI-EB because it has the highest reflection loss at -29.69 dB at 11.812 GHz, whereas PANI-HClO4 has only -2.74 dB reflection loss at 12.400 GHz.
Photocatalytic degradation of methylene blue (MB) by UV-light irradiation using SnO2/CeO2 modified nanographene platelets (NGP)
Authors: Paramarta V , Taufik A , Saleh R
Published: January 2020

The main task of this present work is to enhance the photocatalytic degradation of methylene blue (MB) under UV-light irradiation by using SnO2/CeO2 that combined with nanographene platelets (NGP) composite catalysts. A facile approach for the synthesis of SnO2/CeO2/NGp composites was demonstrated via co-precipitation method. The nanographene platelets (NGP) concentrations in composites were altered between 5–15 weight percent (wt.%). The structure and thermal stability obtained composites catalyst were thoroughly studied by various techniques including X-ray diffraction (XRD) and thermogravimetric analysis (TGA), respectively. XRD analysis reveals that the composites have the tetragonal structure of SnO2 nanoparticle, the cubic phase of CeO2 and the graphitic-like structure from NGP. TGA curves prove the presence of NGP materials in the composites by the decrement in mass at the temperature about 600°C. The synthesized SnO2/CeO2/NGP 10 wt.% composite exhibits higher photocatalytic activities than SnO2/CeO2 and pure SnO2 nanoparticles for the degradation of MB dye under UV light irradiation. The photocatalytic activities of the synthesized samples show an increasing degradation in the order of SnO2<SnO2/CeO2<SnO2/CeO2/NGP 5 wt.%< SnO2/CeO2/NGP 15 wt.% <SnO2/CeO2/NGP 10 wt.%. The enhanced photocatalytic performance could be ascribed to the high electron accepting nature of graphene and increase the number of active sites owing to high charge carrier mobility and high specific surface area of graphene material. The other parameter such as catalyst dosage, irradiation time and scavenger were also analyzed to find out the optimum degradation condition. The SnO2/CeO2/NGP 10 wt.% composite reach optimum photodegradation when irradiation time, catalyst dosage and scavenger are 120 min, 0.3 g/L, and hole, respectively. The tests for reusability tests have also been conducted to ensure the stability of the used catalysts.
Structural and optical study of Cu-doped TiO2 nanoparticles synthesized by co-precipitation method
Authors: Sokoidanto H , Taufik A , Saleh R
Published: January 2020

In this study, we synthesized Cu-doped TiO2 nanoparticles using a coprecipitation method, with chemical TiO2 as the base material and CuSO4.5H2O as a dopant precursor. To characterize their compositional, structural, optical, and paramagnetic properties, we employed energy dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy, diffuse reflectance UV-Visible spectroscopy, and electron spin resonance (ESR) spectroscopy. The outcome of the research study showed the samples to have a tetragonal anatase structure with grain sizes of 52-54 nm. The secondary CuO phase in the 6 at.% and 12 at.% samples showed a Cu solubility limit in their TiO2 lattice, which also influences the lattice parameters. We observed band-gap narrowing with an increasing concentration of the Cu dopant, as indicated by the redshift on the reflectance band edge. Substituting Ti with Cu atoms led to the detection of a paramagnetic species by ESR spectroscopy.
Comparison of Ag and Zr substitution on the structural and optical behaviour of ZnO nanoparticles
Authors: Djaja N F , Taufik A , Saleh R
Published: January 2020

Silver (Ag) and zirconium (Zr) doped ZnO (Ag-doped ZnO and Zr-doped ZnO) nanostructures were prepared utilizing the co-precipitation method, and the physical properties of all prepared samples were characterized utilizing X-ray diffractions, energy dispersive X-ray, and UV-Vis spectroscopy. Ag-doped ZnO and Zr-doped ZnO exhibit the hexagonal wurtzite structure, and the elemental analysis shows that the Ag and Zr concentrations on the samples were 3 atomic percent (at.%). The grain sizes of both samples were examined using Williamson-Hall plots with three different approaches using the uniform deformation model. The band gap energy of the prepared samples investigated using Kubelka-Munk analysis showed a red-shift to a lower energy compared to the band gap of ZnO nanoparticles, and the Zr-doped ZnO shows the lowest band gap energy. The red-shift of the band gap energy from Ag-doped ZnO and Zr-doped ZnO is probably due to the decreased grain size of both samples.
Annealing-temperature dependence of the electrical properties of Ba0.8Pb0.2TiO3 as a PTC material
Authors: Triyono D , Akbar A , Laysandra H
Published: January 2020

In this research, we investigate how the annealing temperature affects the electrical properties of Ba0.8Pb0.2TiO3 as a positive temperature coefficient material. The material was synthesized via solid-state sintering. The grain size was varied by varying the annealing temperature between 850 °C and 1000 °C for 4 h. Characterization via X-ray diffraction showed that a single-phase compound was formed exhibiting a tetragonal phase. The microstructure was observed using scanning electron microscopy. Average grain size was observed to be between 5 and 10μm. The electrical properties as characterized using impedance spectroscopy showed the presence of grain and grain-boundary contributions in the annealed samples. Dielectric constant and dielectric relaxation phenomenon as a function of annealing temperature have been studied.
Bio-nanocomposite of polyvinyl alcohol/Tapanuli organoclay-intercalated surfactant HDTMA-Br: synthesis, tensile and degradation tests
Authors: Aminuddin M , Krisnandi Y K , Juwono A L
Published: January 2020

Currently, the development of plastics that can be easily decomposed is attracting attention, especially for the conversion of polymer-based materials such as modified polyvinyl alcohol (PVA) into composites. Bio-nanocomposites were prepared using the solvent casting method of PVA and organoclay as the matrix and nanofiller, respectively. In this study, the characteristics and mechanical properties of the PVA/hexadecyltrimethylammonium bromide (C16)-intercalated organoclay nanocomposite were examined. This study was carried out in two stages, i.e., the interactions between organoclay and C16 and the synthesis and characterization of the PVA/organoclay-CI6 nanocomposites. Intercalation was verified from the shift of the X-ray Diffraction (XRD) peak from 2θ = 6° to 4.9° of bentonite and organoclay, with a shift in the basal spacing from 15.1 to 19.7 Å. The highest tensile strength of 58.02 MPa was observed for pristine PVA, and the lowest tensile strength of 41.33 MPa was observed for the PVA/organoclay–7% C16 nanocomposite. The highest water vapor transmission rate of 0.35 g/m2/h was observed for the PVA/organoclay–7% Cl6 nanocomposite, and the lowest value of 0.62 g/m2/h was observed for pure PVA. PVA/organoclay–3% C16 exhibited the optimum, as well as the least, decomposition properties, and PVA exhibited natural decomposition.
Effect of Sr substitution on electrical polarization of Ba1-xSrxTiO3 (x = 0.0, 0.2, 0.6, and 0.8) perovskite materials
Authors: Yeceu E , Laysandra H , Triyono D
Published: January 2020

This study aims to investigate the electrical polarization of Ba1-xSrxTiO3 (x = 0.0, 0.2, 0.6, and 0.8) perovskite materials. The materials were synthesized using mechano-synthesis. The structural behaviour was assessed using X-ray diffractometer (XRD), revealing that all samples have a tetragonal perovskite structure with a lattice parameter that decreases with an increase in Sr. The electrical polarization was investigated using an electrometer, showing decreasing spontaneous and saturation polarizations as more Sr is substituted into the Ba sites of (Ba,Sr)TiO3. The decreasing lattice parameters and spontaneous and saturation polarizations in these materials indicate that the crystal structure changes from tetragonal to cubic as more Sr is added.
Analysis of satisfaction and loyalty level of online taxi bike customer
Authors: Pratiwi M N , Setiadi R , Siswantining T
Published: January 2020

Customer satisfaction in marketing research was defined as happiness and awful that was got from someone by comparing perceived performance with perception and expectation. Therefore, customer satisfaction was explained by application quality, driver’s quality and motorcycle quality. Customer loyalty in marketing research was defined by responses that reflected by continue purchasing. All component of application quality, driver’s quality and motorcycle quality is a latent variable that was measured by indicators. The purpose of this research is to know about correlation between loyalty level and satisfaction level depend on sample that was gotten by stratified random sampling. In each stratum, sample has got by systematic sampling. This research used Partial Least Square (PLS) method to find correlation between customer satisfaction and loyalty satisfaction. The results showed that there is positive correlation between satisfaction and loyalty level.