bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Design of a Mechanical Temperature-driven Shut-off Valve
Authors: Zheng-Cun Zhou , Chun-Bai Cui , Xiao-Bin Zhu 
Published: February 2023

Abstract
The structural design of a mechanical temperature-driven shut-off valve used in the water and steam sampling device of a power plant is designed using a Iventor drawing software. A NiTi shape memory alloy with high temperature-sensitivity is used as the driven spring to control the opening and closing of the valve. In addition to the design of the structures and common parts of the shut-off valve, the mechanical calculation and parameter-design of the driven spring are also carried out. The valve is unimpeded and can take water-steam samples under the normal state. When the temperature exceeds a 49 oC, the valve will be shut off due to the driven spring extends and the water intake will stop. When it is necessary to take water-steam samples again, it can be reset manually.
Design and test of a small high frequency ultrasonic cleaning transducer
Authors: Wang Hongbing , Sun Chunhua 
Published: February 2023

Abstract
In order to solve the problem of cleaning of complex surfaces and micro blind holes in industrial products, a small high frequency ultrasonic cleaning transducer was designed and tested. Firstly, the finite element model of the transducer was established, and the influence of structural parameters on the first order longitudinal vibration frequency was analyzed. By adjusting the structural parameters of the transducer, the first order longitudinal vibration frequency of the transducer was determined to be 58716hz.The harmonic response of the transducer was analyzed. The results showed that when the voltage amplitude applied on the piezoelectric ceramic sheet was 80V, the transducer produced resonance at 58716 Hz, and the end face of the front cover of the transducer produced an axial displacement of about 3.34 µm . The transducer was made according to the theoretical analysis results, and the frequency sweep test was carried out on the transducer. The theoretical analysis results were consistent with the test results, which showed that the designed small high frequency ultrasonic cleaning transducer could meet the requirements of high frequency cleaning.
A simulation-based optimization method for facility layout considering the AGV path
Authors: Yang Cheng , Liu Songkai , Xu Zhigang 
Published: February 2023

Abstract
Aiming at the problem of facility layout in intelligent workshops, a collaborative optimization method of facility layout and AGV path planning based on discrete event simulation (DES) is proposed. This method can increase the production capacity of the workshop by solving the workshop open-field layout problem (OFLP). First, to simplify the complex constraints of OFLP, a mathematical programming model is established. Second, a hybrid algorithm is proposed to solve the optimal facility layout and the corresponding multiple AGV paths. Then, the DES is used to calculate the logistics data of the facility layout, and the capacity is taken as the algorithm objective function. Finally, a practical intelligent workshop layout problem is taken as a research case. The calculation results show that the capacity of the workshop is increased by 54% under the optimized layout. Through the special nonlinear integer programming mathematical model and discrete simulation modelling, the optimization method can take into account the complex dynamic logistics process and multiple AGV conflicts and give full play to the flexible and efficient characteristics of open-field layouts. The final workshop layout can not only be close to the actual situation but also have excellent performance.
Preparation and application of new polycarboxylic acid for scale inhibition
Authors: Haiyan Yang , Yueru Li , Wei Wei , Xiuhua Liu 
Published: February 2023

Abstract
In oilfield, scaling caused by water injection is becoming increasingly serious by blocking the gathering and transmission pipelines of the oilfield and resulting in a decline in oilfield production and a great loss of production. Oil and gas leakage caused by pipeline scaling, corrosion and perforation has caused irreversible damage to the surrounding environment. In this paper, citric acid and sodium pyrophosphate are used as the main agents, and hydrolytic polymaleic anhydride, polyaspartic sodium and polyepoxysuccinic acid are respectively compounded to establish polycarboxylic acid scale inhibitor. The scale inhibition experiments of CaCO3, CaSO4 and BaSO4 were carried out to obtain a new type of highly effective polycarboxylic acid scale inhibitor formula. For CaCO3, the best formula is 200 ppm citric acid + 30 ppm hydrolyzed polymaleic anhydride. For CaSO4, the best formula is 100 ppm citric acid + 5 ppm sodium polyaspartate.
Evaluation of the effect of asphalt deposition inhibitor for crude oil
Authors: Yanyun Chen , Liangguang Deng , Xiao Lu , Chunyu Zhao , Zhao Wei 
Published: February 2023

Abstract
In this paper, the effect of asphalt deposition inhibitors coal tar, bromohexadecylpyridine and sodium oleate on the viscosity reduction and asphaltene reduction of crude oil was investigated. The results show that coal tar has a better inhibitory effect on asphaltenes in crude oil. The asphaltene reduction effect is the best when the addition amount is 0.5%. Compared with the blank, the asphaltene content is reduced from 24.47% to 9.42%. The cationic surfactant bromohexadecylpyridine and coal tar have a good synergistic effect, and the asphaltene content is reduced by 1.74% compared with the single addition of 0.5% coal tar.
Nonlinear dynamics of Magnetorheological elastomer sandwich plate under stochastic excitation
Authors: Gou Wen-Jun , Zhu Zhi-Wen 
Published: February 2023

Abstract
In this paper, a kind of magnetorheological elastomer sandwich plate is proposed. The novel nonlinear differential term is applied to describe the force-displacement curve of the magnetorheological elastomer. The constitutive model of the system is established using the Hamilton Modeling Principle. By Galerkin dispersion, the response equation of the system is obtained, and its stochastic dynamic behavior is discussed. The numerical results are simulated by MATLAB mathematics software and show that the magnetorheological elastomer sandwich plate has rich dynamic characteristics, including stochastic Hopf bifurcation, which can be avoided if the parameters vary and only small amplitude vibrations appear.
CO2 emissions from C40 cities: citywide emission inventories and comparisons with global gridded emission datasets
Authors: Ahn Doyeon , Goldberg Daniel L , Coombes Toby , Kleiman Gary , Anenberg Susan C 
Published: February 2023

Abstract
Under the leadership of the C40 Cities Climate Leadership Group (C40), approximately 1,100 global cities have signed to reach net-zero emissions by 2050. Accurate greenhouse gas emission calculations at the city-scale have become critical. This study forms a bridge between the two emission calculation methods: 1) the city-scale accounting used by C40 cities —the Global Protocol for Community-Scale Greenhouse Gas Emission Inventories (GPC) and 2) the global-scale gridded datasets used by the research community —the Emission Database for Global Atmospheric Research (EDGAR) and Open‐Source Data Inventory for Anthropogenic CO2 (ODIAC). For the emission magnitudes of 78 C40 cities, we find good correlations between the GPC and EDGAR (R2 = 0.80) and the GPC and ODIAC (R2 = 0.72). Regionally, African cities show the largest variability in the three emission estimates. For the emission trends, the standard deviation of the differences is ±4.7 %/year for EDGAR vs. GPC and is ±3.9 %/year for ODIAC vs. GPC: a factor of ~2 larger than the trends that many C40 cities pledged (net-zero by 2050 from 2010, or −2.5%/year). To examine the source of discrepancies in the emission datasets, we assess the impact of spatial resolutions of EDGAR (0.1°) and ODIAC (1km) on estimating varying-sized cities’ emissions. Our analysis shows that the coarser resolution of EDGAR can artificially decrease emissions by 13% for cities smaller than 1,000 km2. We find that data quality of emission factors used in GPC inventories vary regionally: the highest quality for European and North American and the lowest for African and Latin American cities. Our study indicates that the following items should be prioritized to reduce the discrepancies between the two emission calculation methods: 1) implementing local-specific/up-to-date emission factors in GPC inventories, 2) keeping the global power plant database current, and 3) incorporating satellite-derived CO2 datasets (i.e., NASA OCO-3).
Grothendieck’s dessins d’enfants in a web of dualities. III
Authors: Yang Di , Zhou Jian 
Published: February 2023

Abstract
We give a new proof of the equivalence between the dessin partition function and the partition function of the Laguerre unitary ensemble (LUE), originally found by Ambjørn and Chekhov. We also introduce a correction factor for the dessin/LUE partition function, and show that the corrected dessin/LUE partition function is a Dubrovin–Zhang type tau-function of the Toda lattice hierarchy. As an application, we use the approach of Dubrovin and Zhang for the computation of the dessin correlators. In physicists’ terminology, we establish dualities among dessin counting, generalized Penner model, and

P

1

-topological sigma model.
Enhanced emission intensity in (Li+/Ca2+/Bi3+) ions co-doped NaLa(MoO4)2: Dy3+phosphors and their Judd-Ofelt analysis for WLEDs applications
Authors: Sonali  , Shivakumara C 
Published: February 2023

Abstract
In the present study, we have synthesized a series of Dy3+ ion doped NaLa(MoO4)2phosphors by the conventional solid-state method at 750 °C for 4h. All the compounds were crystallized in the tetragonal scheelite type structure with space group (I41/a, No.88). The morphology and functional group were confirmed by the field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared(FTIR)spectroscopy. Upon near-Ultraviolet (n-UV) excitation, the PL spectra exhibit the two characteristic emissions of Dy3+ ions, blue (4F9/2 → 6H15/2) at 487 nm and yellow (4F9/2 → 6H13/2) at 574nm respectively. The optimum concentration of Dy3+ionis 3 mol% and then quenching occurred due to multipolar interaction. Further, enhanced the emission intensity by co-doping with monovalent (Li+), divalent (Ca2+) and trivalent (Bi3+) ions. Among them, Li+ ion co-doped samples are shown maximum intensity (50 times) more than Dy3+ doped phosphors as relaxation of parity restriction of electric dipole transition because of local distortion of crystal field around the Dy3+ ions. In addition, by incorporation of Eu3+ ions into NaLa(MoO4)2:Dy3+system, tuned the emission color from white to red, owing to energy transfer from Dy3+ to Eu3+ ions. The intensity parameters (Ω2, Ω4) and radiative properties such as transition probabilities (A
T), radiative lifetime (τ
rad), and branching ratio were calculated using the Judd-Ofelt theory. CIE color coordinates, CCT values indicates that these phosphors exhibit an excellent white emission. The determined radiative properties, CIE and CCT results revealed that the Dy3+-activated NaLa(MoO4)2phosphors are potential materials for developing white LEDs, and optoelectronic device fabrications.
Investigation on the distribution and role of intermetallic aggregates in influencing the mechanical strength of the friction stir welded AZ91C Mg – AA6061 Al alloy joints
Authors: Lokesh Kumar PJ , Sevvel P , Loganathan TG , Prakash D 
Published: February 2023

Abstract
In this experimental work, 6 mm thick plates of distinctive metal alloys namely AZ91C Mg alloy and AA6061 Al alloy were joined using the FSW process, and fabricated joints were investigated to apprehend the impact of convoluted interfaces and their distribution in the nugget zone and the role of intermetallic aggregates in impacting the mechanical properties of the joints. Employment of tool rotational speeds higher than 1100 rpm has fabricated AZ91C Mg–AA6061 Al joints possessing inter–infiltrating structures along with curved junctures, promoting micro-void unification (MCU) on the fractured regions owing to mechanical-related interlocking. AZ91C Mg–AA6061 Al joints have experienced tensile-related failure along the layer of intermetallic and in the regions of inter–infiltrating components nearer to the side of Al parent metal. Joints exhibiting superior strength have been attained due to the generation of intricate interfaces at the joint region, which in turn has contributed to the mechanical-based interlocking. Highest tensile strength exhibited by the joint was 242 MPa, which is nearly 78% of the strength of the parent 6061 Al alloy (310 MPa).
Differential transcendence of solutions for 𝑞-difference equation of Ramanujan function
Authors: Ogawara Hiroshi 
Published: February 2023

No non-trivial solution for the second-order linear

q
q

-difference equation of the Ramanujan function, one of

q
q

-analogues of the Airy function, satisfies any algebraic differential equation over the rational function field. Our proof is based on a criterion for differential transcendence of solutions for difference Riccati equations, which is constructed by S. Nishioka.
Eliminating Ambiguous Treatment Effects Using Estimands
Authors: Kahan Brennan C , Cro Suzie , Li Fan , Harhay Michael O 
Published: February 2023

Abstract
Most reported treatment effects in medical research studies are ambiguously defined, which can lead to misinterpretation of study results. This is because most authors do not attempt to describe what the treatment effect represents, and instead require readers to deduce this based on the reported statistical methods. However, this approach is challenging, because many methods provide counterintuitive results. For example, some methods include data from all patients, yet the resulting treatment effect applies only to a subset of patients, whereas other methods will exclude certain patients while results will apply to everyone. Additionally, some analyses provide estimates pertaining to hypothetical settings in which patients never die or discontinue treatment. Herein we introduce estimands as a solution to the aforementioned problem. An estimand is a clear description of what the treatment effect represents, thus saving readers the necessity of trying to infer this from study methods and potentially getting it wrong. We provide examples of how estimands can remove ambiguity from reported treatment effects and describe their current use in practice. The crux of our argument is that readers should not have to infer what investigators are estimating; they should be told explicitly.
Implementation of a clinical decision support alert to prevent use of intravenous β-blockers and nondihydropyridine calcium channel blockers in hospitalized patients with acute decompensated heart failure
Authors: Okerberg Carl , Adie Sarah , Konerman Matthew , Zimmerman Chris 
Published: February 2023

Abstract

Purpose
Intravenous (IV) β-blockers (BBs) and nondihydropyridine calcium channel blockers (NDCCBs) are harmful in patients with acute decompensated heart failure (ADHF), but they are commonly used for rate control in atrial fibrillation (AF). This study evaluated the implementation of a clinical decision support (CDS) alert in the electronic health record (EHR) to prevent the use of these agents for AF in patients with ADHF, as well as results from the alert’s continuous quality improvement.

Methods
This was a single-center, retrospective, quasi-experimental pre/post analysis of hospitalized adult patients with an ejection fraction of less than 40% documented during their encounter. Groups corresponding to encounters before and after introduction of the alert were compared, and the first version of the alert was compared to its second version that was refined by iterative design.

Results
For all patient hospital encounters, the rate of IV BB and NDCCB orders decreased in the period after alert implementation from 16.2% to 12% (P &lt; 0.001). The alert’s override rate decreased from 83.8% for the first version to 70.1% after iterative design (P = 0.015).

Conclusion
This study demonstrates that a CDS alert can be used in the EHR to reduce the use of potentially harmful IV BBs and NDCCBs in patients with ADHF for rate control. User compliance with the alert was improved by applying human factors design principles and iterative design during continuous quality improvement.
The Maze of Contemporary Contract Theory and a Way Out
Authors: Gordley James , Jiang Hao 
Published: February 2023

Abstract
Contemporary contract theories fail to escape their bondage to 19th century liberal philosophers. Some are based on utility or preference satisfaction, but they disregard justice. Others try to extract conclusions for general concepts such as liberty or autonomy, but they cannot do so without first smuggling their conclusions in the definitions of these concepts. These problems can be resolved by looking in a different direction: to the Aristotelian idea of contract as voluntary commutive justice on which contract theory was grounded before the 19th century. In the Aristotelian tradition, a contract of exchange was defined in terms of its purpose: to enable each party to obtain what he valued more in return for what he valued less without enriching the other party at his own expense. It united a concern for concept of a contract, the purposes of the parties, and the justice of their transaction rather than splitting them apart.
MHTAN-DTI: Metapath-based hierarchical transformer and attention network for drug–target interaction prediction
Authors: Zhang Ran , Wang Zhanjie , Wang Xuezhi , Meng Zhen , Cui Wenjuan 
Published: February 2023

AbstractDrug–target interaction (DTI) prediction can identify novel ligands for specific protein targets, and facilitate the rapid screening of effective new drug candidates to speed up the drug discovery process. However, the current methods are not sensitive enough to complex topological structures, and complicated relations between multiple node types are not fully captured yet. To address the above challenges, we construct a metapath-based heterogeneous bioinformatics network, and then propose a DTI prediction method with metapath-based hierarchical transformer and attention network for drug–target interaction prediction (MHTAN-DTI), applying metapath instance-level transformer, single-semantic attention and multi-semantic attention to generate low-dimensional vector representations of drugs and proteins. Metapath instance-level transformer performs internal aggregation on the metapath instances, and models global context information to capture long-range dependencies. Single-semantic attention learns the semantics of a certain metapath type, introduces the central node weight and assigns different weights to different metapath instances to obtain the semantic-specific node embedding. Multi-semantic attention captures the importance of different metapath types and performs weighted fusion to attain the final node embedding. The hierarchical transformer and attention network weakens the influence of noise data on the DTI prediction results, and enhances the robustness and generalization ability of MHTAN-DTI. Compared with the state-of-the-art DTI prediction methods, MHTAN-DTI achieves significant performance improvements. In addition, we also conduct sufficient ablation studies and visualize the experimental results. All the results demonstrate that MHTAN-DTI can offer a powerful and interpretable tool for integrating heterogeneous information to predict DTIs and provide new insights into drug discovery.
Reproductive toxicity of emerging plasticizers, flame retardants, and bisphenols, using culture of the rat fetal testis
Authors: Tardif Sarah , Rwigemera Arlette , Letourneau Natasha , Robaire Bernard , Delbes Geraldine 
Published: February 2023

Abstract
The use of bis (2-ethylhexyl) phthalate (DEHP), 2,2′4,4′-tetrabromodiphenyl ether (BDE47), and bisphenol A (BPA), as plasticizers, flame retardants, and epoxy resins, respectively, has been regulated due to their endocrine disrupting activities. Replacements for these chemicals are found in human matrices, yet the endocrine disrupting potential of these emerging contaminants is poorly characterized. We compared the effects of legacy chemicals with those of their replacements using fetal rat testis organ culture. Fetal testes sampled at gestation day 15 were grown ex vivo, and the impact was evaluated after a 3-day exposure to 10 μM of each legacy chemical; two BPA analogs (bisphenol M and bisphenol TMC); three replacements for DEHP/MEHP (2,2,4-trimethyl-1,3-pentanediol diisobutyrate, diisononyl-phthalate, and diisodecyl adipate); or two replacements for BDE47 (tributoxyethyl phosphate and isopropylated triphenyl phosphate). We showed that only BPA and MEHP significantly decrease testosterone secretions after 24 h, while BPM and BPTMC have the opposite effect. Luteinizing hormone-stimulated testosterone was reduced by BPA and MEHP but was increased by BPTMC. After exposure, testes were used for immunofluorescent staining of germ cells, Sertoli cells, and Leydig cells. Interestingly, exposures to BPM or BPTMC induced a significant increase in the Leydig cell density and surface area. A decrease in germ cell density was observed only after treatment with MEHP or BDE47. MEHP also significantly decreased Sertoli cell proliferation. These studies show that some replacement chemicals can affect testicular function, while others appear to show little toxicity in this model. These findings provide essential information regarding the need for their regulation.
The urgent need for innovation in contraception
Authors: Johnston Daniel S , Kopf Gregory S 
Published: February 2023

AbstractDespite advancements in medicine over the past decades, there exists a significant unmet global need for new and improved contraceptive methods for men and women. The development of innovative contraceptives will be facilitated via advancements in biomedical science, biomedical engineering, and drug development technologies. This article describes the need for new methods, opportunities afforded by advancements in biomedical science, strategies being employed to advance innovative novel methods, value of drug development accelerators and the need for industry involvement to provide men and women worldwide greater reproductive autonomy.