bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effects of frequency, duration, and intensity on L2 learning through Duolingo
Authors: Sudina Ekaterina , Plonsky Luke 
Published: August 2023

Abstract
Instructed second language (L2) research has frequently addressed the effects of spacing, or, alternatively, the
distribution of practice effects. The present study addresses Rogers and Cheung’s
(2021) concerns about the ecological validity of such work via a natural experiment (Craig et al., 2017). Learners’ self-determined exposure and in-app behavior were examined in relation to
language gains over time. Duolingo learners of Spanish or French (N = 287) completed a background questionnaire,
scales measuring L2 motivation and grit, and two tests of L2 proficiency before and after a six-month period of user-controlled
app usage. Total minutes of app exposure exhibited a correlation with written but not oral proficiency gains. More dependable
correlates of gains were frequency- and curriculum-oriented measures. Additionally, L2 grit and motivation were weakly to
moderately correlated with several in-app behaviors. We conclude with implications for how apps can best be leveraged to produce
L2 gains.
Syntax and music for interaction
Authors: Geva Yuval 
Published: August 2023

Abstract
Multimodal constructions which intertwine language and music are characteristic of the discourse of creative
encounters among musicians. This interactional linguistic study reports on one such construction: the ‘music-taking-predicate’
(MTP) construction. MTP constructions consist of a projective verbal predicate, and a stretch of sung or played musical expression
following it. Based on naturalistic video data of Hebrew-speaking musicians in rehearsals and production sessions, I show that
instances of this construction emerge as formulae for the achievement of several interactional tasks integral to the process of
joint music making.
Slowly evolving horizons in Einstein gravity and beyond
Authors: Tarafdar Ayon , Bhattacharjee Srijit 
Published: August 2023

Abstract
We study event horizon candidates for slowly evolving dynamical black holes (BHs) in General Relativity and Einstein–Gauss–Bonnet (EGB) gravity. Such a type of horizon candidate has been termed as slowly evolving null surface (SENS). It signifies a near-equilibrium state of a dynamic BH. We demonstrate the time evolution of such surfaces for three different metrics. First, we locate such a surface for a charged Vaidya metric and show that the parameter space of the BH gets constrained to allow a physically admissible SENS. We then consider a supertranslated Vaidya solution that contains a non-spherical horizon and study the properties of the SENS. This spacetime generates a non-vanishing shear at the SENS due to the presence of the supertranslation field. The SENS for a spherically symmetric Vaidya-like solution in EGB gravity yields a bound on the accretion rate that depends on the size of the horizon. We also show that the first and second laws of BH mechanics can be established for these slowly evolving surfaces.
Photodetector based on Ruddlesden-Popper perovskite microwires with broader band detection
Authors: Yan Yongxu , Li Zhexin , Lou Zheng 
Published: August 2023

Abstract
Recently, the two-dimensional (2D) form of Ruddlesden-Popper perovskite (RPP) has been widely studied. However, the synthesis of one-dimensional (1D) RPP is rarely reported. Here, we fabricated a photodetector based on RPP microwires (RPP-MWs) and compared it with a 2D-RPP photodetector. The results show that the RPP-MWs photodetector possesses a wider photoresponse range and higher responsivities of 233 A/W in the visible band and 30 A/W in the near-infrared (NIR) band. The analyses show that the synthesized RPP-MWs have a multi-layer, heterogeneous core-shell structure. This structure gives RPP-MWs a unique band structure, as well as abundant trap states and defect levels, which enable them to acquire better photoresponse performance. This configuration of RPP-MWs provides a new idea for the design and application of novel heterostructures.
Spin injection into heavily-doped n-GaN via Schottky barrier
Authors: Sun Zhenhao , Tang Ning , Chen Shuaiyu , Zhang Fan , Fan Haoran , Zhang Shixiong , Wang Rongxin , Lin Xi , Liu Jianping , Ge Weikun , Shen Bo 
Published: August 2023

Abstract
Spin injection and detection in bulk GaN were investigated by performing magnetotransport measurements at low temperatures. A non-local four-terminal lateral spin valve device was fabricated with Co/GaN Schottky contacts. The spin injection efficiency of 21% was achieved at 1.7 K. It was confirmed that the thin Schottky barrier formed between the heavily n-doped GaN and Co was conducive to the direct spin tunneling, by reducing the spin scattering relaxation through the interface states.
Enhanced efficiency of the Sb2Se3 thin-film solar cell by the anode passivation using an organic small molecular of TCTA
Authors: Hu Yujie , Chen Zhixiang , Xiang Yi , Cheng Chuanhui , Liu Weifeng , Zhan Weishen 
Published: August 2023

Abstract
Antimony selenide (Sb2Se3) is an emerging solar cell material. Here, we demonstrate that an organic small molecule of 4, 4', 4''-tris(carbazol-9-yl)-triphenylamine (TCTA) can efficiently passivate the anode interface of the Sb2Se3 solar cell. We fabricated the device by the vacuum thermal evaporation, and took ITO/TCTA (3.0 nm)/Sb2Se3 (50 nm)/C60 (5.0 nm)/Alq3 (3.0 nm)/Al as the device architecture, where Alq3 is the tris(8-hydroxyquinolinato) aluminum. By introducing a TCTA layer, the open-circuit voltage is raised from 0.36 to 0.42 V, and the power conversion efficiency is significantly improved from 3.2% to 4.3%. The TCTA layer not only inhibits the chemical reaction between the ITO and Sb2Se3 during the annealing process but it also blocks the electron diffusion from Sb2Se3 to ITO anode. The enhanced performance is mainly attributed to the suppression of the charge recombination at the anode interface.
Tellurium-loaded organic scintillators
Authors: Suslov I. , Nemchenok I. , Klimenko A. , Bystryakov A. , Kamnev I. 
Published: August 2023

Abstract
The R&D results of new tellurium-loaded liquid and plastic scintillators (TeLS and TePS) for the experiments on the search for neutrinoless double beta decay are presented. Linear alkylbenzene and polystyrene are used as a scintillation base for TeLS and TePS, respectively. Diphenyltellurium di-2-ethylhexanoate and a complex compound of diphenyltellurium oxide and di-(2-ethylhexyl)phosphoric acid are proposed as tellurium-containing additives. The transparency, light yield and long-term stability of the organic scintillators are discussed.
Resource potential of the genus Triticum and its use in world agriculture
Authors: Zakharova N N , Zakharov N G 
Published: August 2023

Abstract
The article discusses the genetic potential of the genus Triticum, the extent of distribution of its main species T. aestivum L., the area of this crop in the context of parts of the world, countries of the world. The dynamics of sown areas, yields, gross yields of wheat grain for the 60-year period (1961-2020) is also presented. It has been established that on a global scale, with a slight decrease in wheat sown areas (by 122 thousand hectares every five years), there is a steady increase in its yield (by 0.202 t/ha every 5 years) and an increase in gross grain production (by 43.565 million tons every 5 years ).
Influence of the sowing time on the productivity and efficiency of Sarepta mustard in the conditions of the central zone of the Krasnodar Territory
Authors: Samelik E G , Burda A G , Kosnikov S N , Logoida T V , Maksimenko E P 
Published: August 2023

Abstract
When sowing any agricultural crop, a number of requirements must be observed. One of these requirements is the right sowing time, because it has a great influence on the quality and quantity of the crop. In this study, using the example of Sarepta mustard, the influence of the sowing time on the yield of agricultural crops was revealed.
The influence of bacteriophages on the manifestation of their pathogenic properties by Xanthomonas campestris bacteria
Authors: Maiorov P S , Feoktistova N A , Suldina E V , Khasanova V S 
Published: August 2023

Abstract
The use of bacteriophages to control the development of different bacterioses, including those caused by bacterium Xanthomonas campestris is one of the most promising areas of development in the field of plant protection. At the same time, the selection of the most active bacteriophages and the determination of parameters of their use remains one of the most urgent tasks of this direction. The use of phage preparations with low initial concentration of phage particles may not only prevent the development of bacterial disease, but also lead to the emergence of phage-resistant bacterial strains. In this paper, the influence of bacteriophages in various concentrations on bacterial strains and the possibility of latter infecting the host plant is analyzed. It was established that the treatment of bacterial suspensions by bacteriophages with a titer of 107-108 PFU/ml excluded the development of disease in plants inoculated with this bacterial suspension. In case of a decrease in the initial titer of bacteriophage, in some cases, symptoms of the development of the disease began to appear, down to the point that after treatment of bacterial suspensions by phages with a titer of 103 PFU/ml, the development of bacterial disease in host plants inoculated with this bacterial suspension was noted in all the studied cases.
Analysis of meteorological data of the reanalysis model NCEP GFS for the atmosphere of Krasnoyarsk city
Authors: Volodko O S , Buryak N A , Dergunov A V 
Published: August 2023

Abstract
Air pollution is an important problem for cities. Krasnoyarsk city is one of the dirtiest cities in the Russian Federation. Meteorological conditions have a significant impact on air pollution. In the present study, for constructing a regression model of forecasting periods of high levels of air pollution, the dimension of meteorological data of the global atmospheric model National Centers for Environmental Prediction Global Forecast System (NCEP GFS) was reduced. The meteorological data were collected between June 2019 and March 2022. To reduce the dimension of meteorological data were used correlation analysis and principal component analysis (PCA). These methods also resolved the problem of collinearity between independent variables. The same meteorological parameters of different vertical layers were reduced from 157 to 58 using correlation analysis. The principal component analysis made it possible to reduce the data dimension to 18 principal components that contain 90% of the total variance. The first 5 principal components contain 71% of the total variance. The principal components will be used to construct the principal components regression.
Growth regulators efficiency in onion planting material preparataion
Authors: Blagorodova E N , Varfolomeyeva N I , Nepshekueva T S 
Published: August 2023

Abstract
Winter onion culture compares favorably with spring production with early harvest dates. In the conditions of the Krasnodar Territory, the first products arrive at the end of May-the first decade of June. However, obtaining a guaranteed harvest largely depends on the plants winter hardiness, which is determined not only by the prevailing conditions of overwintering, but also by the elements of growing technology, which include pre-planting preparation of seed onion. The article presents the results of studies on the influence of growth regulators used for soaking the sowing before planting for winter hardiness, the timing of the phenological phases onset, the dynamics of the leaf surface and bulbs growth, the size and structure of the crop. Seed onion was soaked before planting in solutions of three growth regulators (Radix, Radipharm, Rostok) for 12 hours, the control was a variant with planting material soaking in water. The seed onion of the first group (0.8-1.5 cm in diameter) was planted in early November, with 45 cm row spacing and 444.4 thousand pieces / ha planting density. It was found that Radix and Radipharm preparations significantly increased onion plants winter hardiness, the percentage of overwintered plants was 88.2-88.7% (80.3% under control), accelerated the ripening time of the crop (by 5-7 days), contributed to the activation of the growth processes of the aboveground apparatus. The pre-planting preparation of the seed onion did not affect the shooting processes intensity, the percentage of shot plants in the experiment was 7.5-7.9. The highest total yield of onion (39.2 t/ha) and the yield of standard bulbs (36.8 t/ha) with an average bulb weight of 102.2 g was obtained with the use of Radix. The increase in the yield in this variant and the earlier products’ entering the market contributed to net income increase compared to the control by 79.9 thousand rubles. The use of growth regulators for seed soaking had no effect on the products’ standard, it varied between 93.5-93.9%..
Dynamic analysis of cracked plates based on a first-order shear deformation theory formulation by using an extended meshfree method
Authors: Lo Vay Siu , Truong Thien Tich , Nguyen Nha Thanh 
Published: August 2023

Abstract
An extended meshfree method is employed in this paper for investigating the dynamic behaviour of cracked plates based on the first-order shear deformation theory (FSDT). The FSDT is a straightforward formulation with the assumption of first-order shear deformation as its name implies, which is appropriate for relatively thick plates. In this study, the meshfree method is chosen as an alternative to the conventional mesh-based methods to model plate structures. Among various meshfree formulations, Moving Kriging (MK) is a method that satisfies the Kronecker delta property, allowing for the easy imposition of essential boundary conditions. An extended MK formulation is proposed in this paper to model cracked plates without explicitly pre-defining the crack in the geometry domain. In the extended concept, the extrinsic enriched functions are employed to model the discontinuity due to the crack. Particularly, the Heaviside step function is employed to describe the discontinuity of the displacement fields on two sides of the crack surface. And the asymptotic enriched functions are used for stress singularity around the crack tip. In the dynamic analysis of cracked plates, one of the important factors that must be evaluated is the dynamic stress resultant intensity factor (DSRIF). In this paper, the DSRIFs are shown through many numerical examples and compared with analytical solutions and other numerical methods, showing the accuracy and efficiency of the present extended MK approach.
Seismic resistance of post-tensioned bridge column improving post-earthquake recovery
Authors: Fujioka Hikaru , Fujikura Shuichi , Thay Visal 
Published: August 2023

Abstract
This study aims to improve the recovery of bridge columns after being damaged subjected to an earthquake and also proposes a PC column that reduces residual displacement by prestressing. The proposed column has a repairability of the damaged part of the column by arranging a concrete-filled steel tube at the column core. The seismic performance and post-earthquake recovery of the proposed columns were verified by conducting cyclic loading tests. Test results showed that the residual displacement was not reduced enough to improve the post-earthquake recovery. However, after investigating the column core at the end of the test, almost no visible damage, such as fracture or buckling, was found in the steel tube at the core, which means that the concrete-filled steel tube core itself can support the structure above. Therefore, the proposed system can be repaired quickly after being damaged if the residual displacement can be reduced.
A comprehensive review of incremental launching method in the construction of prestressed reinforced concrete bridges in Vietnam
Authors: Dang Viet Duc , Dang Gia Nai 
Published: August 2023

Abstract
This paper discusses the implementation of the incremental launching method in the construction of prestressed reinforced concrete bridges in Vietnam. Since the 1990s, technology transfer has been initiated to develop and rapidly expand the country’s road and rail transport network system to support industrialization and modernization. Although the method was successfully applied in several bridge projects, the high construction cost has led to a controversial issue, and the government stopped its application in the country. The paper aims to analyze the limitations and unreasonableness in the project formulation, design survey, and procurement of technological equipment that led to the policy of stopping the application of the incremental launching method. The author provides an in-depth analysis to clarify the suitability of the policy and shed light on the issue’s root causes.
Vibration response analysis technique for elevator wire rope
Authors: Minagawa Keisuke , Fujita Satoshi 
Published: August 2023

Abstract
Wire rope is an element often used in transportation infrastructure and systems such as bridges, elevators, ropeways, funiculars and so on. Generally, wire ropes require a high level of safety because they suspend heavy and important components such as roadways in bridges, cages and cabins in elevators, ropeways and funiculars. In addition to dead loads like roadways, wire ropes are subjected to dynamic loads caused by earthquakes, wind and moving cars, etc. Therefore, it is important to accurately simulate the dynamic response of wire ropes to dynamic loads to ensure safety of wire ropes. This paper deals with techniques for vibration response analyses of wire ropes. Techniques in this paper specially focused on a transverse vibration of wire ropes for elevators because their response is complicated by the moving cage and tension distribution. Vibration response analysis techniques using the difference method and a simplified mass point model will be introduced in this paper.
Averaging equation of three-dimensional tracer transport by a dual approach
Authors: Nguyen The Hung 
Published: August 2023

Abstract
The conventional method for calculating averaged tracer concentration in three-dimensional tracer transport equation relies on classical averaging, which averages tracer concentration data obtained from the tracer transport equation in turbulent flow. However, the averaging tracer concentration quantity calculated by this method is not precisely the same as the one obtained by the dual approach. To address this issue, the author proposes a more intricate dual approach for averaging the three-dimensional tracer transport equation in turbulent flow. This paper describes how the author performs two integrations: one from time t to t + r (where r < T, T being the repeated period of fluctuating concentration), and another from time t to time t + T. The fluctuating concentration quantity in turbulent flow is modeled using the trigonometric Fourier series. The resulting three-dimensional mathematical model of tracer transport obtained by this dual approach is more comprehensive than the one obtained by the classical method.
On-site response issues in disaster recovery of public civil engineering facilities based on the experience of the 2011 Kii Peninsula flood
Authors: Ota Kazuyoshi , Kondo Shinya 
Published: August 2023

Abstract
Nearly 10 years have passed since the 2011 Kii Peninsula flood, and assessing the disaster response at that time is crucial for developing a future disaster response system. This study is based on questionnaire and interview surveys of construction managers, i.e., heads of local construction administrations in charge of disaster recovery for public civil engineering facilities in Wakayama Prefecture. We clarify the situational judgments and decisions that are made in the field response of disaster recovery, check whether they were undertaken to extract issues, examine the characteristics, and consider issues for future disaster response.
Size dependent pull-in instability of functionally graded microbeams using a finite element formulation
Authors: Le Cong Ich , Pham Vu Nam , Nguyen Dinh Kien 
Published: August 2023

Abstract
The size dependent static pull-in instability of functionally graded (FG) microbeams in micro-electromechanical systems (MEMS) is studied, considering the influence of the axial force. The material properties of the microbeams are varied in the beam thickness by a power-law function, and they are calculated by the rule of mixture. To account for the microsize effect, the classical Euler-Bernoulli beam theory is employed in combination with the modified couple stress theory to describe the microbeams deformation. Based on Von Kármán nonlinear relationship, a beam element is derived and employed to establish the discretized governing equation for the microbeams. Newton-Raphson iterative procedure is adopted to compute frequencies and pull-in voltages for the microbeam with clamped ends. Numerical result reveals that the pull-in voltage is increased by the increase of the power-law exponent and the microscale parameter. The effects of the material distribution, the axial force as well as the microstructural parameter on the pull-in instability of the FG microbeams are investigated in detail.
Spot size-based laser vibrometer using an advanced image sensor for structural health monitoring
Authors: Cao Xuan Binh , Phan Hoang Nam , Hoang Le Phuong , Hoang Phuong Hoa , Pham Duy Hoa 
Published: August 2023

Abstract
Failure-induced vibrations are a common phenomenon in many civil structures, and the characterization of their vibration frequencies is crucial for monitoring their structural health. This paper presents a new optics-based mechanical system that can monitor the vibrations of civil structures through the fluctuation of laser spot size using advanced image sensors. The principle behind this vibrometer combines mechanical oscillation and laser optics, and it provides information on vibration through the precise variation of spot size in a low-cost, low-risk, and high-speed manner. The system comprises simple components that are easily integrated into various civil structures. Therefore, this novel approach offers a promising method for effectively monitoring the health of civil structures.
A novel automated crack identification method for concrete bridge structure using an unmanned aerial vehicle
Authors: Truong Chung T , Dang My Q , Pham Tung P , Do Phong V , Tran Huy Q 
Published: August 2023

Abstract
This study explores an automated method for identifying cracks on a concrete bridge structure using an unmanned aerial vehicle (UAV) equipped with a high-resolution camera. First, images are captured from the bridge, then a novel automated algorithm are used to isolate the region of interest. The deep learning algorithm then detects cracks on the structure using a pre-trained Convolutional Neural Network (CNN) model. The proposed method was tested on Tran Phu bridge, and the results confirmed the effectiveness of the UAV-based inspections for identifying cracks on structures.