bluuebunny/crossref_metadata_2025_split huggingface dataset:
Machine learning guided prediction of the yield strength and hardness of multi-principal element alloys
Authors: Taufique Mohammad Fuad Nur , Mamun Osman , Roy Ankit , Khakurel Hrishabh , Balasubramanian Ganesh , Ouyang Gaoyuan , Cui Jun , Johnson Duane D. , Devanathan Ram 
Published: October 2023

Background: Multi-Principal Element Alloys (MPEAs) have better properties, such as yield strength, hardness, and corrosion resistance compared to conventional alloys. Compositional optimization is a challenging task to obtain desired properties of MPEAs and machine learning is a potential tool to rapidly accelerate the search and design of new materials. Methods: We have implemented different machine learning models to predict the yield strength and Vickers hardness of MPEAs at room temperature and quantify the uncertainty of the predictions. Results: Our results suggest that valence electron concentration (VEC) is the key feature dominating the yield strength and hardness of MPEAs. Our predicted yield strength and hardness values for the experimental validation set show < 15 % error for most cases with respect to the experimental values. Conclusions: Our machine learning model can serve as a useful tool to screen half a trillion MPEAs and down select promising compositions for useful applications.
Clock synchronizing radio access networks to picosecond precision using optical clock distribution and clock phase caching
Authors: Clark Kari A. , Zhou Zichuan , Liu Zhixin 
Published: October 2023

Performing positioning of future mobile devices using trilateration through radio access networks would provide a robust alternative to currently used global navigation satellite systems. However, the positioning accuracy is strongly dependent on the time synchronization accuracy of the antennas used as location reference points. Consequently, achieving sub-30 cm positioning accuracies requires the synchronization of radio access network antennas to sub-nanosecond accuracy. Here we show a clock phase synchronization and optical clock signal distribution approach to clock synchronization in radio access networks that achieves 0.98-ps root-mean-square precision clock synchronization, in a real-time field-trial demonstration on 37.6-km dark fiber, with optical clock frequency synchronization and clock phase caching operating using 25.6-Gb/s commercial transceivers. We quantify the clock synchronization performance of our approach using standard metrics, including time deviation (TDEV) and mean time interval error (MTIE). Furthermore, we estimate the impact of varying the phase update rate used in clock phase caching on the clock synchronization performance of our approach. Through our two combined approaches, we explore a route towards achieving sub-nanosecond clock synchronization in radio access networks.
The effect of surgical correction of Lenke types I and III scoliotic deformities on the spinal balance in patients aged 15–35 years
Authors: Belozerov Vadim Vasilyevich , Peleganchuk Aleksey Vladimirovich , Mikhaylovskiy Mikhail Vitalyevich 
Published: October 2023

Objective. To analyze the effect of spinal deformity correction on the parameters of the frontal and sagittal balance in patients aged 15-35 years with Lenke types I and III idiopathic scoliosis.Material and Methods. The dynamics of sagittal and frontal parameters of the spinal balance was assessed in 268 patients aged 15 to 35 years with Lenke type I and III idiopathic scoliosis before and after surgical treatment. The patients’ quality of life and the number of postoperative complications were assessed depending on the imbalance severity.Results. More than half of patients (55.6 %) with Lenke types I and III idiopathic scoliosis have initial balance disorders, and 14.6 % of them have pronounced abnormalities. Significant balance disorders are predicted by severe scoliosis (85.3° ± 30.3°), greater L5 tilt (10.3 ± 7.9 before surgery; 5.3 ± 4.8 after surgery) and initial sagittal imbalance (32.75 ± 27.7), large residual scoliotic curve (43.3° ± 23.1°), large angle of residual thoracic kyphosis (32.3° ± 15.9°), and smaller angle of lumbar lordosis after surgery (52.3° ± 14.1°); p < 0.05. The main compensatory elements, in addition to PT and SS, are the angle of L5 tilt in the frontal plane and the L5–S1 angle in the sagittal plane. In young patients aged 15-35 years, disc mobility at the L5–S1 level is sufficient to achieve a more balanced body position, even with a significant change in the PI-LL ratio.Conclusion. In the long-term postoperative period, a pronounced imbalance of the spine increases the risk of mechanical postoperative complications up to 50 %, while the quality of life of patients does not decrease, and repeated surgical interventions are required in singular cases. Correction of scoliotic deformity allows increasing the number of patients without balance disorders by 6 %, and reducing the number of gross deviations by 2 times.
Comparative radiological analysis of hybrid and circular stabilization methods for the treatment of osteoporotic vertebral burst fractures
Authors: Rerikh Viktor Viktorovich , Sinyavin Vladimir Dmitryevich 
Published: October 2023

Objective. To perform a comparative radiological analysis of the methods of hybrid stabilization (posterior fixation in combination with cement vertebroplasty and osteoplasty with deproteinized allobone) and circular stabilization (posterior fixation in combination with anterior fusion) used in the treatment of uncomplicated burst fractures of the vertebral bodies associated with osteoporosis.Material and Methods. The study is retrospective. Two groups of patients were formed, and inclusion and exclusion criteria were determined. The magnitude of kyphosis correction (according to Cobb), the magnitude of residual postoperative kyphotic deformity, as well as its recurrence in the long-term postoperative period, and the sagittal balance (Barrey index) were assessed. The follow-up period was 12 months. Subjective assessments of the patient’s condition were not considered.Results. The magnitude of initial kyphotic deformity (>20°), incomplete achievement of kyphosis correction after surgery (> 5°), the value of densitometry T-score, and sagittal imbalance before and after surgical intervention are, with a statistically significant difference, the main predictors of local kyphosis recurrence, incomplete correction of deformity and decompensated sagittal imbalance.Conclusions. When comparing the methods of hybrid and circular stabilization, there was no statistical difference in radiological outcomes.
Repeat discectomy and spinal fusion in the treatment of recurrent lumbar disc herniation: systematic review of the literature
Authors: Makirov Serik Kaliulovich , Musa Gerald , Ndandja Dimitri T. Keri , Chmutin Gennady Egorovich , Kim Alexander Valeryevich , Hovrin Dmitri Vladimirovich , Otarov Olzhas Bekenovich 
Published: October 2023

Objective. To conduct a literature review of studies comparing the treatment of recurrent lumbar disc herniation using discectomy and spinal fusion.Material and Methods. A comprehensive search across four electronic databases (PubMed, Google Scholar, Science Direct, and Cochrane) was conducted. Studies comparing the outcomes of discectomy and spinal fusion for recurrent lumbar disc herniation were analyzed. Postoperative complications, cost and duration of surgery, length of hospital stay, pain score, and recurrence rate were compared.Results. Ten studies comprising data of 1066 patients met the inclusion criteria. Discectomy was performed in 620 of them, while 446 patients underwent spinal fusion surgery. Discectomy yielded good results in VAS scores for leg and back pain, but after 3–6 months, there was no significant difference compared to spinal fusion. The recurrence rate for discectomy varied from 7.27 % to 22.91 %, while fusion had 0 % same-level recurrence. Fusion surgery had fewer complications: 1.72–28.00 % (average 11.6 %) vs 5.25–32.73 % (average 15.7 %) for discectomy. However, spinal fusion had longer operation time, greater blood loss and longer hospital stay compared to discectomy.Conclusion. Discectomy and spinal fusion are effective treatment options for recurrent lumbar disc herniation. At the same time, discectomy demonstrates a high level of initial relief of symptoms and is more cost-effective. However, the risk of recurrence is significant, and the progression of degeneration and instability may result in pain recurrence within a year. Fusion surgery provides stability and eliminates the risk of recurrence, but the main challenge is the cost of surgery. The choice of technique should be based on individual patient factors, and the advantages and disadvantages of each approach should be carefully considered.
Extraction and characterization of type I collagen from scales of Mexican Biajaiba fish
Authors: Lino-Sánchez Araceli , González-Vélez Virginia , Vélez Marisela , Aguilar-Pliego Julia 
Published: October 2023

Abstract
Type I collagen is a high-value polymer found naturally in animal species and with many applications in the biomedical field. Collagen is frequently obtained from bovine tendons, but this source presents the risk of disease transmission, thus marine collagen is becoming an alternative source of this valuable material. In the present work, we report the successful extraction and characterization of the natural collagen found in the scales of Biajaiba, a highly consumed fish native to the Gulf of Mexico. We obtained acid- and pepsin-soluble type I collagens with high denaturation temperatures, high hydroxyproline contents, and yields in the ranges reported for other fish scales. Our work proposes a useful alternative for transforming the huge quantities of discarded fish scales in our country to extract a high-value product for biomedical applications.
The time-dependent deformation and damage constitutive model of rock based on dynamic disturbance tests
Authors: Chu Shaofeng , Chen Shihai , Liu Minlong , Huang Jiang , Wei Haixia 
Published: October 2023

Abstract
In the deep rock excavation process, the rock will produce deformation and damage under multiple dynamic disturbances, while there is also unrecoverable time-dependent deformation. In order to research this deformation characteristic, a sine wave disturbance triaxial loading test was carried out on red sandstone to simulate the failure process of deep underground rock mass under dynamic disturbance loads with low confining pressure. Based on the results that the deformation of the rock increases suddenly during dynamic disturbances and varies with the number of disturbances, a novel disturbance damage model relating the number of disturbances to the deformation of the disturbances is created to describe the deformation and damage accumulation of the rock under multiple disturbances and an operator is developed to ensure that the model works. In order to describe the time-dependent deformation of rocks, the elasticity model in the traditional Bingham model was improved to a nonlinear elasticity model that varies with time, and its viscous and plasticity models were retained. The time-dependent deformation and damage constitutive model is obtained by combining the improved Bingham model with the disturbance damage model. The model parameters were identified according to the test data, and the finite-element calculation of the model was realized with the secondary development program. The results show the strain of rock increases suddenly under multiple disturbances, and the main reason for rock damage is the action of dynamic disturbances. The fitted curves and finite-element results are consistent with the experimental results. The time-dependent deformation and damage constitutive model of rock not only reflects the decaying rheological and steady-state rheological properties of rock under static loading but describes the characteristics of strain surge and disturbance damage accumulation caused by dynamic disturbances. This article contributes to the characteristics of the deformation of deep rock mass.
Evaluation of spatial form of rural ecological landscape and vulnerability of water ecological environment based on analytic hierarchy process
Authors: Cai Pei , Zhang Xiaopu , Xing Yanyan , Chen Fulan , Qu Huimin , Lou Jianxin , Li Yang 
Published: October 2023

Abstract
The spatial form of the rural ecological landscape and the vulnerability of the water ecological environment are evaluated to understand the status of the rural ecological system and provide a scientific basis for improving and protecting the rural ecological environment. With the acceleration of the urbanization process, rural areas in urban fringe areas have become an important carrier of urban space expansion and function allocation due to their advantages in transportation and resources, and have been included in the urban production and consumption system. The fast change in country capabilities and the consistent change in land use structure show a differentiated and enthusiastic improvement pattern. According to the point of view of provincial rejuvenation and new urbanization, this study discussed about the time-space qualities of provincial change and land use change, examined the coupling connection between rustic change and land use change, and set forward commonsense country improvement procedures and land guideline measures, which can not only stimulate the vitality of rural development but also consolidate the foundation of rural revitalization. Through the investigation and analysis of rural ecological land, it was found that the rural ecological land decreased from 95.14 to 89.84% from 2015 to 2019, then rose to 92.94%, and finally fell back to 91.74%, which is relatively stable on the whole. It can be seen that the spatial form, coupling, and coordination of the water ecological environment in rural ecological landscape presents a stable trend.
Stochastic uncertainty management in electricity markets with high renewable energy penetration
Authors: Sadek Shady M. , Ryad Ahmed K. , Mostafa Mostafa H. 
Published: October 2023

Abstract
The high penetration of renewable energy sources (RESs) in modern power systems poses two conflicting issues. First one is the reduction in the operation costs resulted from RESs utilization instead of the expensive fossil fuel thermal generating units. However, the RESs are characterized by its uncertain and intermittent behavior that their output power is not dispatchable and not known exactly due to forecast errors. Therefore, reserves are scheduled in the day-ahead market to meet the uncertain supply from RESs which add some costs to the system. The decision maker should be aware of those two conflicting objectives in order to operate the system in the optimal way with minimum operation costs. The problem of the market clearing is formulated as Mixed Integer Linear Programming (MILP) problem using GAMS software. It is considered a two stage stochastic programming with the objective of minimizing the expected total operation energy and reserve costs while satisfying the various operational constraints. The results show the effectiveness of the RESs integration in different cases with the consideration of load shedding, RESs curtailment and transmission congestion. As shown from the results, when the network is congested, the operation costs are increased due to the load shedding and RESs curtailment events occur. Moreover, scheduled reserves are increased to face the uncertainty of RESs. As the RESs power penetration increases with no network congestion, a decreasing trend in the operation cost can be seen. However, this trend is less marked as the uncertainty of RESs generation increases. For the network congested case, the reduction rate of the operation cost is decreased for increasing RESs power penetration levels.
Power quality improvement of utility-distribution system using reduced-switch DSTATCOM in grid-tied solar-PV system based on modified SRF strategy
Authors: Peerzadah Ehsanul Haque , Perveen Rehana , Bhat Abdul Hamid 
Published: October 2023

Abstract
This paper describes a three-phase VSC based 4-switch Grid-Tied Solar PV-DSTATCOM using Modified Synchronous Reference Frame (MSRF) Theory to achieve the Unity Power Factor (UPF) operation, Zero Voltage Regulation (ZVR) operation, perform harmonics compensation and compensation against load unbalancing. The DC-Link voltage is set stable and voltage balancing is done across the split-capacitors under all load-charge conditions. Coordinated design of DSTATCOM consists of integrated Grid-Tied Solar Photovoltaic (PV) array and a DC-to-DC boost converter circuit for improvement of Photovoltaic energy/power. Maximum Power Point Tracking (MPPT) is used to provide the fixed power which is trapped and transferred from the array to the boost converter. UPF operation and ZVR are not available together. So, models are designed separately to accomplish one of the objectives (UPF and ZVR) for linear, non-linear and unbalanced loads. Simulation models are first designed in MATLAB software and then in Real-Time using RT-LAB having MASTER and CONSOLE blocks for Computation and Communication. In building of the model, Real-Time Digital Simulator (OPAL-RT 4510) is used in which hardware synchronised models are embedded, and hardware real-time results are displayed on the synchronised four-channel oscilloscope RIGOL-MSO5204.
Fostering well-being in the university L2 classroom: the “I am an author” project
Authors: Amorati Riccardo , Hajek John 
Published: October 2023

Abstract
This study explores the effect of a project-based learning module informed by the principles of the Deep Approach to World Language Education on students’ well-being in an advanced Italian language subject. Data were collected via a questionnaire (n = 21) created in light of Oxford’s EMPATHICS model of well-being. As part of this module, students were tasked with creating and self-publishing an illustrated story in Italian. Results indicate that the project contributed to students’ well-being, mostly because it enabled them to have an experience of authorship while also making a difference by supporting the local Italian community. Students were able to gain control of their learning by engaging in a task that they perceived as enriching and socially meaningful. The project also had a positive influence on students’ self-efficacy and self-concept, on their intrinsic motivation for learning Italian, as well as on their overall sense of belonging and accomplishment.
Teaching writing to English language learners: two science teachers’ perspectives and practices
Authors: Qi Yang , Fang Zhihui 
Published: October 2023

AbstractWriting is fundamental to science and integral to its practice. This study examined two sixth-grade science teachers’ perspectives on and practices in teaching writing to English language learners (ELLs). Both teachers were interviewed on their beliefs about and experience in teaching writing to ELLs in science. They were also each observed once per week for their writing instruction over one semester. All writing samples produced by the ELLs during the semester were collected. Qualitative analysis of the data revealed that both teachers recognized the importance of writing to science but provided few opportunities for extended writing and limited writing instruction to ELLs. The teachers cited ELLs’ disinterest in science and lack of writing proficiency, as well as their own lack of time and preparedness to teach writing, as the main reasons for not making writing a priority in their teaching practice, for having lower expectations for ELLs, and for not offering substantive language/literacy support to ELLs. These findings indicate that the lofty goal of literacy-science integration remains largely unfulfilled, despite nearly two decades of strong push for border crossing by both science and literacy educators. They suggest that a reenvisioning of the relationship between literacy and science is needed to ensure effective science instruction for ELLs and other students in need of language/literacy support.
Theory of Certain Non-Univalent Analytic Functions
Authors: Gangania Kamaljeet 
Published: October 2023

ABSTRACT
We investigate the non-univalent function’s properties reminiscent of the theory of univalent starlike functions. Let the analytic function

ψ

(
z
)

=

∑

i
=
1

∞

A
i

z
i

, A
1 ≠ 0 be univalent in the unitdisk. Non-univalent functions may be found in the class

ℱ

(
ψ
)

of analytic functions f of the form

f

(
z
)

=
z
+

∑

k
=
2

∞

a
k

z
k

satisfying (zf′ (z)/f (z) – 1) ≺ ψ(z). Such functions, like the Ma and Minda classes k=2 of starlike functions, also have nice geometric properties. For these functions, growth and distortion theorems have been established. Further, we obtain bounds for some sharp coefficient functionals and establish the Bohr and Rogosinki phenomenon for the class

ℱ

(
ψ
)

. Non-analytic functions that share properties of analytic functions are known as poly-analytic functions. Moreover, we compute Bohr and Rogosinski’s radius for poly-analytic functions with analytic counterparts in the class

ℱ

(
ψ
)

or classes of Ma-Minda starlike and convex functions.
Zur Kenntnis ternärer Oxoarsenate(III) dreiwertiger Lanthanoide: Synthese und Charakterisierung von LnAsO3- und Ln
2As4O9-Vertretern mit Ln = La und Ce sowie Ln = Pr, Nd, Sm–Gd
Authors: Locke Ralf J. C. , Ledderboge Florian , Schleid Thomas 
Published: October 2023

Abstract
The title compounds have been prepared from the elemental lanthanoids and arsenic sesquioxide in 1:1 and 2:3 molar ratios in the presence of a cesium-halide flux at temperatures near 1000 °C generating elemental arsenic as the by-product. With the preparation of B-type La[AsO3] crystallizing in the monoclinic space group P21/c with the lattice parameters a = 904.03(8), b = 789.96(7), c = 837.49(7) pm and β = 103.354(3)°, both A- and B-type Ln[AsO3] representatives are now available for lanthanum and cerium. The crystal structure consists of two crystallographically distinct Ln
3+ cations with eight- or ninefold coordination by O2− anions. The Ln
3+ cations are arranged in layers of (Ln1)3+ and corrugated bilayers of (Ln2)3+ cations in the (100) plane. The two different As3+ cations appear in [AsO3]3− units, which differ mainly in their environment of Ln
3+ cations. The successful synthesis of the compounds Ln
2As4O9 (Ln = Pr, Nd, Eu and Gd) reported here on the one hand closes the structural gap between cerium and neodymium, and on the other hand also extends the spectrum of ternary oxoarsenates(III) of lanthanoids to gadolinium, with the neodymium compound for the first time at standard temperature. The crystals of the Ln
2As4O9 compounds are triclinic (space group:

P

1
‾

$P\overline{1}$

) with lattice parameters nicely reflecting the lanthanoid contraction from a = 690.61(5), b = 768.95(6), c = 959.72(8) pm, α = 96.927(3), β = 103.812(3), γ = 104.441(3)° for Pr2As4O9 to a = 676.12(5), b = 751.58(6), c = 951.57(8) pm, α = 96.462(3), β = 103.678(3), γ = 104.409(3)° for Gd2As4O9 with two crystallographically independent lanthanoid(III) positions. The oxidic environments on these sites show the shape of square antiprisms with significant distortions, but (Ln2)3+ has a ninth oxygen contact in a capped antiprism. The linkage of the polyhedra creates layers in the ab plane, which are separated by the complex anions of arsenic. The oxoarsenate(III) units [AsO3]3− are linked by sharing oxygen corners to form both dinuclear [As2O5]4− and cyclic tetranuclear [As4O8]4− complex anions, which is why the compounds can also be represented with their structured molecular formula Ln
4[As2O5]2[As4O8]. The free electron pairs of the arsenic(III) cations point into channels, which are built up in the crystal structure along [010].