bluuebunny/crossref_metadata_2025_split huggingface dataset:
Expanding Sgr A* dynamical imaging capabilities with an African extension to the Event Horizon Telescope
Authors: La Bella Noemi , Issaoun Sara , Roelofs Freek , Fromm Christian , Falcke Heino 
Published: January 2023

Context. The Event Horizon Telescope (EHT) has recently published the first images of the supermassive black hole at the center of our Galaxy, Sagittarius A* (Sgr A*). Imaging Sgr A* is plagued by two major challenges: variability on short (approximately minutes) timescales and interstellar scattering along our line of sight. While the scattering is well studied, the source variability continues to push the limits of current imaging algorithms. In particular, movie reconstructions are hindered by the sparse and time-variable coverage of the array.
Aims. In this paper, we study the impact of the planned Africa Millimetre Telescope (AMT, in Namibia) and Canary Islands telescope (CNI) additions to the time-dependent coverage and imaging fidelity of the EHT array. This African array addition to the EHT further increases the eastwest (u, v) coverage and provides a wider time window to perform high-fidelity movie reconstructions of Sgr A*.
Methods. We generated synthetic observations of Sgr A*’s accretion flow and used dynamical imaging techniques to create movie reconstructions of the source. To test the fidelity of our results, we used one general-relativistic magneto-hydrodynamic model of the accretion flow and jet to represent the quiescent state and one semi-analytic model of an orbiting hotspot to represent the flaring state.
Results. We found that the addition of the AMT alone offers a significant increase in the (u, v) coverage, leading to robust averaged images during the first hours of the observating track. Moreover, we show that the combination of two telescopes on the African continent, in Namibia and in the Canary Islands, produces a very sensitive array to reconstruct the variability of Sgr A* on horizon scales.
Conclusions. We conclude that the African expansion to the EHT increases the fidelity of high-resolution movie reconstructions of Sgr A* to study gas dynamics near the event horizon.
Numerical simulation of tasks of vertical viscoelastic oscillation of suspension systems of frame, engine, cabin and seat
Authors: Rakhmankulova Barna , Mirzaev Sayibdjan , Yusupov Mazhid 
Published: January 2023

The analysis of the structures of the springing systems of modern vehicles showed that polymer composites are used in vehicles for which the decrease in curb weight is a critical indicator. The use of springs (suspensions) from polymer composites makes it possible to reduce the weight of the elastic element and increase durability while improving the smoothness of movement, reducing noise, and increasing traffic safety. When replacing the steel suspension with a polymer composite suspension, the mass of unsprung parts of the car decreases, and the economic performance of wheeled vehicles improves.
The article discusses the problem of vertical viscoelastic oscillations of the suspension systems of the skeleton, engine, cabin, and seat. When considering the suspension's rheological properties, the Boltzmann-Volterra integral model is used. The Koltunov-Rzhanitsyn nucleus is used as a nucleus, which has weakly singular features of the Abel type. The system of integro-differential equations describing the studied process is solved by a method based on the use of quadrature formulas. The effect of the parameters of the hereditary-deformable properties of the suspension on the vibration shape is shown.
Justification of compactor parameters for cleaning and transportation of raw cotton
Authors: Khudaiberdiev Abduaziz , Kuychiev Odil 
Published: January 2023

The article substantiates the method of compaction and the parameters of the compactor of raw cotton in an elastic container, which make it possible to increase the productivity of cotton pickers due to the large capacity of the container and the increase in the coefficient of use of shift time. A layered compaction method has been studied, which makes it possible to compact the cotton mass with its continuous flow from the bottom to the neck of the container.
Theoretically, the pressure in various layers of the cotton mass, the distance between the inner ends of the sealing elements, the magnitude of the stroke and the speed of movement of the sealer, and the volume of the container are determined, the coefficients taking into account the elongation of the height of the container and the layering of the seal are found. All parameters are substantiated by the condition of ensuring high productivity and reliability of the cotton pickers.
Experimental studies of pneumatic disc atomizer for low volume spraying
Authors: Utepov Burxon , Khaydarov Tuygun , Rajabov Nurmamat , Murtazayeva Gulnoza , Tulaganov Bakhtiyor , Avliyakulov Mirzoolim 
Published: January 2023

The article presents the results of experimental studies to determine the dependence of the rotational speed of a pneumatic disc sprayer with coaxial air flow on the flow rate of the working fluid. To refine the parameters of the working body, studies were carried out within the liquid flow rate q, corresponding to the first and second spraying modes, at different rotation speeds ω, the working body's radius r, and the number of radial channels np. At the same time, the mass of the rotating part of the pneumatic disk atomizer was determined.
The quality of dispersion of the working fluid obtained experimentally by a multi-disk atomizer in a film version driven by an air flow corresponds to a low-volume liquid atomization mode.
Molecular Neurosurgery: Introduction to Gene Therapy and Clinical Applications
Authors: Addison Angela P. , McGinnis J.P. , Ortiz-Guzman Joshua , Tantry Evelyne K. , Patel Dhruv M. , Belfort Benjamin D. W. , Srivastava Snigdha , Romero Juan M. , Arenkiel Benjamin R. , Curry Daniel J. 
Published: January 2023

AbstractTo date, more than 100 clinical trials have used sequence-based therapies to address diseases of the pediatric central nervous system. The first targeted pathologies share common features: the diseases are severe; they are due (mostly) to single variants; the variants are well characterized within the genome; and the interventions are technically feasible. Interventions range from intramuscular and intravenous injection to intrathecal and intraparenchymal infusions. Whether the therapeutic sequence consists of RNA or DNA, and whether the sequence is delivered via simple oligonucleotide, nanoparticle, or viral vector depends on the disease and the involved cell type(s) of the nervous system. While only one active trial targets an epilepsy disorder—Dravet syndrome—experiences with aromatic L-amino acid decarboxylase deficiency, spinal muscular atrophy, and others have taught us several lessons that will undoubtedly apply to the future of gene therapy for epilepsies. Epilepsies, with their diverse underlying mechanisms, will have unique aspects that may influence gene therapy strategies, such as targeting the epileptic zone or nodes in affected circuits, or alternatively finding ways to target nearly every neuron in the brain. This article focuses on the current state of gene therapy and includes its history and premise, the strategy and delivery vehicles most commonly used, and details viral vectors, current trials, and considerations for the future of pediatric intracranial gene therapy.
Toward a more ‘sovereign’ Europe? Domestic, bilateral, and European factors to explain France’s (growing) influence on EU politics, 2017–2022
Authors: Bora Salih Isik , Schramm Lucas 
Published: January 2023

AbstractIn recent years, both inside and outside France, scholars and policymakers have emphasized a small and declining French influence on European politics and the political direction of the European Union (EU). By contrast, in 2022, at the end of President Emmanuel Macron’s first term in office, the EU increasingly follows French preferences and ideas. We argue that this renewed French clout is due to the interplay of factors located at different levels of government: a centralized political system and careful preparation of policy objectives at the domestic level, together with a more balanced bilateral relationship with Germany and several exogenous shocks hitting the EU, enabled the French President to upload national policy priorities to the European level. We combine a longer-term perspective, which considers the formulation and pursuit of national strategies, with moments of crisis altering the EU’s status quo and leading member states to promote change. We demonstrate France’s influence on EU politics based on developments in three policy fields, namely fiscal policy, competition policy, and defense industrial policy.
Design and fabrication of a series contact RF MEMS switch with a novel top electrode
Authors: Wu Qiannan , Guo Honglei , Liu Qiuhui , Zhu Guangzhou , Wang Junqiang , Cao Yonghong , Li Mengwei 
Published: January 2023

Radio-frequency (RF) micro-electro-mechanical-system (MEMS) switches are widely used in communication devices and test instruments. In this paper, we demonstrate the structural design and optimization of a novel RF MEMS switch with a straight top electrode. The insertion loss, isolation, actuator voltage, and stress distribution of the switch are optimized and explored simultaneously by HFSS and COMSOL software, taking into account both its RF and mechanical properties. Based on the optimized results, a switch was fabricated by a micromachining process compatible with conventional IC processes. The RF performance in the DC to 18 GHz range was measured with a vector network analyzer, showing isolation of more than 21.28 dB over the entire operating frequency range. Moreover, the required actuation voltage was about 9.9 V, and the switching time was approximately 33 μs. A maximum lifetime of 109 switching cycles was obtained. Additionally, the dimension of the sample is 1.8 mm × 1.8 mm × 0.3 mm, which might find application in the current stage.
Soft-bottom polychaetes in a chronic eutrophic bay on the coast of Alexandria
Authors: Elebiary Noha , Abd Elnaby Faiza , Dorgham Mohamed M. , Hamdan Amira M. , Hamdy Rasha 
Published: January 2023

Context The polychaetes are the major benthos in the soft bottom of the eutrophic Eastern Harbour of Alexandria, Egypt. Aim Investigate the quantitative and qualitative dynamics of polychaete community in the Harbour. Methods Polychaetes were collected bimonthly from August 2018 to June 2019, by using a 29- × 16-cm grab. Key results In total, 54 polychaete species were identified, belonging to 27 families and 51 genera. The family Syllidae was represented by eight species, Spionidae by five species, and Cirratulidae by five species, against one to three species from all other families. Eleven alien species were recorded, including four new to the Mediterranean Sea (Caulleriella cristata, Armandia casuarina, Spio blakei and Prionospio lighti). The polychaete community displayed pronounced temporal variations in both species diversity and numerical abundance at the two sampled sites. Conclusion This study showed high diversity and abundance of polychaetes in such eutrophic basin. Implications The eutrophication may play a role in the structure and count of polychaetes in the Eastern Harbour.
Collostructional transfer effects in Turkish learners of English
Authors: Gedik Tan Arda 
Published: January 2023

Abstract
Second language acquisition studies have mainly considered transfer between two or more languages as a binary
setting, it either happens or does not. However, research emerging out of usage-based approaches show that such transfer effects
might be more gradient than ever thought before (e.g., Goschler & Stefanowitsch,
2019). Investigating a construction that has been reported to pose problems such as overpassivization to L2 English
learners, i.e., unaccusatives, this study aims to trace gradient transfer effects between Turkish and English in the
intransitive-unaccusative construction in Turkish learners of English. Following Goschler and
Stefanowitsch’s (2019) method to analyze, extract experimental items from English and Turkish corpora, and experiment
with collostructional transfer effects, the study revealed similar findings. Findings suggest that learners are likely to transfer
strongly entrenched L1 items into the L2 even at advanced proficiency levels. Interestingly, when the item is weakly entrenched in
L1, speakers attune to the input in L2 with growing proficiency. Furthermore, proficiency or experience helps with preempting
non-optimal constructional combinations. Pedagogically, the study suggests that collo-profiles may help teachers and students with
mitigating unconventional item-construction combinations at advanced levels.
The role of childhood nostalgia in the reception of translated children’s literature
Authors: Chen Xuemei 
Published: January 2023

AbstractThis article explores how childhood nostalgia influences the reception of translations, specifically in the case of the (re)translation of E. B. White’s children’s book,Charlotte’s Web(1952). I concentrate on two translations – one by Xin Kang (White 1979) and the other by Rongrong Ren (White 2004). The theoretical framework complements existing reception research with theories of nostalgia, collective memory, and cultural memory. A qualitative analysis of reader posts on social media sites shows that a group of adult readers prefer Kang’s translation because they read it as children and feel a nostalgic attachment to it. This nostalgia expresses itself in three ways: (1) Kang’s version, as a memory trigger, connects adults to their childhood, (2) sharing digitized versions of Kang’s translation and the online sale of its hardcover version creates nostalgic online communities based on a collective memory, and (3) Kang’s version is considered a classic that should, as a kind of cultural memory, be passed on to the next generation. In this article, I argue that childhood nostalgia, an often ignored extratextual factor, influences adult reception of translated children’s literature. I thus offer a new perspective on translation reception and the ‘aging’ issue in studies of retranslation.
Investigating sensor location on the effectiveness of continuous glucose monitoring during exercise in a non‐diabetic population
Authors: Coates Alexandra M. , Cohen Jeremy N. , Burr Jamie F. 
Published: January 2023

ABSTRACTThe purpose of this investigation was to evaluate whether continuous glucose monitoring (CGM) sensors worn on the active muscle may provide enhanced insight into glucose control in non‐diabetic participants during cycling exercise compared to traditional sensor placement on the arm. Data from 9 healthy participants (F:3) was recorded using CGM sensors on the arm (triceps brachii) and leg (vastus medialis) following 100 g glucose ingestion during 30 min experimental visits of: resting control, graded cycling, electrically stimulated quadriceps contractions, and passive whole‐body heating. Finger capillary glucose was used to assess sensor accuracy. Under control conditions, the traditional arm sensor better reflected capillary glucose, with a mean absolute relative difference (MARD) of 12.4 ± 9.3% versus 18.3 ± 11.4% in the leg (P = 0.02). For the intended use during exercise, the sensor‐site difference was attenuated, with similar MARDs during cycling (arm:15.5 ± 12% versus leg:16.7 ± 10.8%, P = 0.96) and quadriceps stimulation (arm:15.5 ± 14.8% versus leg:13.9 ± 9.5%, P = 0.9). At rest, glucose at the leg was consistently lower than the arm (P = 0.01); whereas, during graded cycling, the leg‐glucose was lower only after maximal intensity exercise (P = 0.02). There was no difference between sensors during quadriceps stimulation (P = 0.8). Passive heating caused leg‐skin temperature to increase by 3.1 ± 1.8°C versus 1.1 ± 0.72°C at the arm (P = 0.002), elevating MARD in the leg (23.5 ± 16.2%) and lowering glucose in the leg (P < 0.001). At rest, traditional placement of CGM sensors on the arm may best reflect blood glucose; however, during cycling, placement on the leg may offer greater insight to working muscle glucose concentrations, and this is likely due to greater blood‐flow rather than muscle contractions.
Analysis of Solubility Change of Soluble Magnesium Alloy by Melting Treatment in Petroleum Downhole
Authors: Shang Xiaofeng , Dong Jiazhi , Wang Zhijan 
Published: January 2023

Abstract
In order to solve the problem that the material utilization rate of soluble magnesium base alloy rod is less than 30%, the method of magnesium alloy rod casting is adopted to improve the material utilization rate. However, the cooling mode affects the dissolution rate of soluble magnesium alloy after casting. According to the different thermal conductivity of different materials, cylindrical graphite molds and copper molds with diameters of 5mm and 40mm are selected for casting magnesium alloys. In order to ensure the reliability of experimental results, polarization method and weight loss method were used to analyze the dissolution rate of soluble magnesium base alloy under different cooling modes. The test results show that: Magnesium alloy is cooled and solidified by copper mold with a diameter of 5mm, and the dissolution rate is the highest in 1.5% NaCl solution with a speed of 1.2856mm/h. The grain size of magnesium alloy can be refined by increasing cooling rate. After the grain boundary of magnesium-based alloy is refined, the grain boundary between the alloy increases, the number of corrosion galvanic cells increases, and the dissolution rate of magnesium-based alloy gradually increases.
Analysis of water invasion effect and development scheme design for deep water HHT gas reservoir: A case study of LS25 gas field
Authors: Donglei Jiang , Wenbo Meng , Shujie Liu , Yi Huang , Yi Yu , Yinghao Wang , Bicheng Gan , Zhandong Li , Jiazhi Feng 
Published: January 2023

Abstract
Based on the South China Sea deepwater high temperature and high pressure gas reservoir LS25 gas field, 3D geological model and a numerical reservoir model of LS25 gas field are established. Through numerical simulation of gas reservoir production, quantitative analysis of water invasion characteristics of 11 wells has been completed. The whole process of water invasion in space is as follows: bottom water conies in the early stage, forming water cone shape, the scale of the water body to the ridge increases, and the horizontal section completely emerges. Through comparative study, it is concluded that the combined water control technology of variable density screen pipe has the best water control effect. According to the prediction and analysis of the final production plan of variable density technology, it can prolong the water-free gas production period of the gas reservoir by 0.7 years, prolong the total production time by 1.9 years, increase the gas production by 1.9×108m3, and increase the recovery factor by 10.5% compared with that without water control measures. The research results are aimed to establish an optimal water control development model for buried hill gas reservoirs, and provide a good technical support for reasonable and scientific water control research of horizontal wells in offshore buried hill fractured gas reservoirs.
Research on Matching Strategy between Precision and Efficiency of Laser Melting Deposition of Metal Materials
Authors: Liu Hongjun , Zou Jian , Zhang Yingwei , Zhao Jibin , Zhao Yuhui , Liu Wenzhe 
Published: January 2023

Abstract
At present, laser deposition forming technology of titanium alloy is widely used based on the flexibility of laser additive manufacturing technology. However, the mechanism and law of influence on the forming accuracy and efficiency need further study. Based on the orthogonal experiment, the analysis of the results shows that with the increase of energy density, the forming accuracy and efficiency are improved. There is a negative correlation between precision and efficiency. The experimental data are fitted and analyzed by establishing a statistical regression analysis model, a regression prediction model is established, and the regression prediction model is comprehensively calculated and analyzed, so as to optimize the appropriate parameter interval. During the forming process, the energy density is maintained in the range of 300 J/mm2–400 J/mm2, the forming accuracy is at a high level of 80%, the forming efficiency can be maintained in a high range of 0.35 g/s-0.40 g/s, and the whole forming process is in a state of high precision and high efficiency, so that the matching strategy of precision and efficiency in the forming process is the best. In order to improve the laser deposition forming titanium alloy.
Optimization of coal procurement and transportation decisions based on improved genetic algorithm
Authors: Liu Qing , Peng Liang , Liu Wenzhe , zhang Bo 
Published: January 2023

Abstract
The cost of coal in thermal power generation accounts for more than 70% of the cost of power generation, coal consumption is high, and the high price of coal has a significant impact on the profitability of power plants. In this paper, a model is developed for the purchase and transfer of coal from thermal power plants and a genetic algorithm is used for the optimal decision making.
Research on rapid construction technology of three-dimensional safety control area for the complex maintenance work environment of substation
Authors: An Xing , Zhang Xiao-hua , Liu Zhan , Yang ShunFu , Sun Bo 
Published: January 2023

Abstract
According to the actual needs of the substation operation and maintenance team, this paper studies the defect video intelligent analysis technology in realizing three-dimensional cross-border early warning, analyzes the principle and early warning application of narrowband millimeter-wave technology and develops a set of 3D cross-border early warning system for substation maintenance operation. The system adopts wideband network technology to realize the remote operation and stable data transmission between the system and the warning and analysis service software of mobile terminal. In this early warning analysis system, this study uses the combination of intelligent video analysis and millimeter-wave radar dynamic target capture to solve many deficiencies in early warning accuracy by relying solely on intelligent video analysis and early warning. Through the on-site verification of the test system, the system’s overall function is consistent with the substation maintenance and maintenance requirements. It is simple to use, and the accuracy of the crossover warning reaches more than 85%.
Dual crosslinked injectable protein-based hydrogels with cell anti-adhesive properties
Authors: Giri Pijush , Verma Devendra 
Published: January 2023

Abstract
Currently, one of the most severe clinical concerns is post-surgical tissue adhesions. Using films or hydrogel to separate the injured tissue from surrounding tissues has proven the most effective method for minimizing adhesions. Therefore, by combining dual crosslinking with calcium ions (Ca2+) and tetrakis(hydroxymethyl) phosphonium chloride, we were able to create a novel, stable, robust, and injectable dual crosslinking hydrogel using albumin (BSA). This dual crosslinking has preserved the microstructure of the hydrogel network during the degradation process, which contributes to the hydrogel’s mechanical strength and stability in a physiological situation. At 60% strain, compressive stress was 48.81 kPa obtained. It also demonstrated excellent self-healing characteristics (within 25 min), tissue adhesion, excellent cytocompatibility, and a quick gelling time of 27 ± 6 s. Based on these features, the dual crosslinked injectable hydrogels might find exciting applications in biomedicine, particularly for preventing post-surgical adhesions.