bluuebunny/crossref_metadata_2025_split huggingface dataset:
Factors influencing subseasonal predictability of northern Eurasian cold spells
Authors: Erner Irene , Karpechko Alexey 
Published: May 2024

AbstractCold‐air outbreaks have significant impacts on human health, energy consumption, agriculture, and overall well‐being. This study aims to evaluate the effectiveness of Subseasonal‐to‐Seasonal (S2S) models in predicting cold conditions over northern Eurasia, defined here as the lower tercile of weekly mean 2‐metre temperature anomalies. To assess the predictability of these events we use ensemble hindcasts from five prediction systems from the S2S database. Our analysis focuses on identifying the conditions under which the models confidently predict cold temperatures with a high (>0.5) probability 3–4 weeks ahead, which potentially can represent windows of forecast opportunity. We compare the group of forecasts that correctly predicted the events to the group that forecasted events that did not occur in practice (false alarms). Most of the confident forecasts of cold spells, both correct and false alarms, have cold anomalies already in the initial conditions, often in conjunction with either a negative phase of the North Atlantic Oscillation, or Scandinavian Blocking. We find that S2S models tend to overpredict cold temperatures, with false alarms occurring more likely when the forecasts are initialized during a weak polar vortex. Furthermore, most of the confident false alarms receive the signal from the stratosphere rather than following internal tropospheric dynamics. False alarms initialized during the weak polar vortex conditions are more common when the vortex is in a recovery stage and, subsequently, the downward ‐propagating signal is short‐lived in the troposphere. The analysis of forecasts during different Madden–Julian Oscillation (MJO) phases shows that nearly half of all confident correct cold‐temperature forecasts are initialized during an active MJO in phases 6–8. On the other hand, most false alarms occur during phase 3, which we suggest is due to the presence of the Scandinavian Blocking regime in the initial conditions for this phase.
Estimating beluga whale abundance from space: using drones to ground‐validate VHR satellite imagery
Authors: Stewart Jordan B. , Hudson Justine M. , Sherbo Bryanna A. H. , Watt Cortney A. 
Published: May 2024

AbstractRoutine monitoring of cetaceans is imperative for understanding their population trends and making informed management decisions. However, the inherent nature of cetaceans and the marine ecosystems they inhabit make annual population surveys logistically and economically challenging with current survey methods. One emerging solution is utilizing very high‐resolution (VHR) satellite imagery, which is a logistically efficient method for providing an instantaneous view of areas spanning hundreds of square kilometers. The objective of this study was to determine two factors required to reliably conduct beluga whale population abundance estimates with VHR satellite imagery: (1) depths that beluga whales are visible in VHR satellite images, which are used to define availability bias correction factors, and (2) a comparison of abundance estimates in VHR satellite imagery to current aerial methods. We submerged beluga whale models to different depths in two different water clarities and determined that beluga whales are distinguished only at the surface in turbid water (Secchi depth: 2.56 m) and at depths of 0–2 m in clear water (Secchi depth: 4.04 m). Based on the proportion of time beluga whales spend at these depths, an availability bias correction factor for Western Hudson Bay beluga whales was defined as 2.40 ± 0.16 for turbid water and 1.89 ± 0.05 for clear water. Synchronous ground‐validation surveys determined availability corrected beluga whale abundance estimates in 0.31 m VHR satellite imagery (n = 173 beluga whales) and imagery that was HD sharpened using a proprietary algorithm to approximate 0.15 m resolution (n = 170) to be comparable to drone imagery (n = 164). VHR satellite imagery has the potential to increase the frequency of beluga whale population surveys, which has become increasingly important as beluga whales face rapid ecosystem changes and increased anthropogenic disturbances.
An Enhanced Optical Response and Interfacial Charge Separation Of rGO Supported Cu2+ Doped Co3O4 Heterojunction For Photo‐Fenton‐Like Activity
Authors: Udhayakeerthana C. , Palanivel Baskaran , Vignesh K. , Kalaivani T. 
Published: May 2024

AbstractIn recent years, clean water and increasing the usage of renewable energy have been the two main goals to be focused on in developing a sustainable living environment. These goals can also be fulfilled by using photocatalytic processes which is a promising direction, photocatalyst is quite effective for water purification and sustainable energy resources. For the first time, we report a visible‐light‐driven photocatalyst of rGO/Cu−Co3O4 nanocomposite for photo‐Fenton‐like degradation activity. The structural, morphological, surface chemical and optical properties of the samples were deeply analysed. The Cu2+ replacement reduces the crystalline size of the Co3O4 nanoparticle and rGO addition enhances the active surface area and charge mobility towards the better catalytic activity. The effect of operating parameters such as pH, catalyst dose, dye concentration, and H2O2 was also investigated for methylene blue (MB) dye degradation: kinetic studies, active radicals finding, and percentage of total organic carbon removal were also discussed in detail.
Using Silica Aerogel Layers for the Stabilization of Zn Metal Anodes in Zn‐Ion Batteries
Authors: Zhang Jincheng , Jiang Bingchun , Ling Lei , Lu Yusheng , Zou Tianyu , Cao Bozhong , Zhang Tong 
Published: May 2024

AbstractAqueous zinc ion batteries have the advantages of low cost, high safety, high theoretical specific capacity. However, the charging and discharging process is usually accompanied by side reactions such as dendrite growth, hydrogenolysis, corrosion of electrodes, passivation, etc., which limits the development and application. In this work, the zinc anode is modified by constructing a silica aerogel layer with ultra‐high specific surface area and abundant polar functional groups (−OH, −COOH, −CH3), which not only provides abundant active sites for the uniform deposition of zinc ions, but also construct an artificial protective layer that acting as a desolvation layer and a zinc ion flux regulator. Consequently, the altered zinc anode exhibits an extremely durable zincophilic characteristic and a declining interfacial impedance. The constructed artificial layer can prevent side reactions and promote uniform zinc ion deposition to prevent the generation of zinc dendrites during the charge/discharge process. Results show that the symmetric cells composed of modified Zn anodes can be stably cycled for more than 1100 h at 0.5 mA cm−2 and 0.5 mAh cm−2, which is much higher than that of bare Zn. In addition, the life and capacity retention of the Zn/MnO2 full cells were also significantly improved.
Reticular Chemistry Directed “One‐Pot” Strategy to in situ Construct Organic Linkers and Zirconium‐Organic Frameworks
Authors: Han Chao‐Qin , Wang Lei , Si Jincheng , Zhou Kang , Liu Xiao‐Yuan 
Published: May 2024

AbstractZirconium‐based metal–organic frameworks (Zr‐MOFs) have emerged as one of the most studied MOFs due to the unlimited numbers of organic linkers and the varying Zr‐oxo clusters. However, the synthesis of carboxylic acids, especially multitopic carboxylic acids, is always a great challenge for the discovery of new Zr‐MOFs. As an alternative approach, the in situ “one‐pot” strategy can address this limitation, where the generation of organic linkers from the corresponding precursors and the sequential construction of MOFs are integrated into one solvothermal condition. Herein, inspired by benzimidazole‐contained compounds synthesized via reaction of aldehyde and o‐phenylenediamine, tri‐, tetra‐, penta‐ and hexa‐topic carboxylic acids and a series of corresponding Zr‐MOFs can be prepared via the in situ “one‐pot” method under the same solvothermal conditions. This strategy can be utilized not only to prepare reported Zr‐MOFs constructed using benzimidazole‐contained linkers, but also to rationally design, construct and realize functionalities of zirconium‐pentacarboxylate frameworks guided by reticular chemistry. More importantly, in situ “one‐pot” method can facilitate the discovery of new Zr‐MOFs, such as zirconium‐hexacarboxylate frameworks. The present study demonstrates the promising potential of benzimidazole‐inspired in situ “one‐pot” approach in the crystal engineering of structure‐ and property‐specific Zr‐MOFs, especially with the guidance of reticular chemistry.
A new plant genus and species from south‐eastern Spain: Castrila latens (Rubieae, Rubiaceae)
Authors: Blanca Gabriel , Schuler Samira Ben‐Menni , Blanca Helena , Cueto Miguel , Fuentes Julián , Ortega‐Olivencia Ana , Suárez‐Santiago Víctor N. 
Published: May 2024

AbstractA new genus and species, Castrila latens, native to the south‐eastern Iberian Peninsula, is described here for the first time and compared with its closest relatives. The plant is characterized by being annual, glabrous, having reduplicate leaves in whorls of (5)6–7, inflorescences capitate and involucrate, corolla shortly hypocrateriform and white, with yellowish doliiform tube, stamens included, and ovary and mericarps densely papillose. An endemic plant, it grows on the calcareous mountains of the Sierra Seca, Sierra de Castril, and Sierra de la Cabrilla, between 1800 and 2100 m of elevation, in the Granada and Jaén provinces (eastern Andalusia, Spain). For this genus and species, a description, an illustration, a distribution map, the chromosome number, the assessment of the conservation status, an estimate of the breeding system, and the situation in the Rubieae phylogenetic tree are provided.
Researchers Training Researchers: Ethics Training in Quantitative Applied Linguistics
Authors: Wood Margaret , Sterling Scott , Larsson Tove , Plonsky Luke , Kytö Merja , Yaw Kate 
Published: May 2024

AbstractThis forum piece reports on a brief survey of current quantitative research ethics training materials in Applied Linguistics (AL). This survey was conducted as a step towards an increased understanding of the ways in which we, as a field, train students and researchers to conduct quantitative research ethically. The survey was carried out in the process of creating research ethics training materials as part of a grant‐funded project related to questionable research practices (QRPs). Through manual and computer‐assisted searches in twenty‐four textbooks and twenty‐three course syllabi from the past five years, three themes emerged: (1) research ethics is most often conceptualized in terms of IRB‐related topics, (2) when ‘ethical gray‐zone’ issues are mentioned, the focus is primarily on methodological transparency, data sharing/open science, and selecting the appropriate research design and statistical tests, and (3) materials tend to address the topic of research ethics in a single section or chapter, or in a single day or week of a course. Against this background, we provide three recommendations that our field can implement to provide more robust and thorough research ethics training for students and researchers in TESOL and Applied Linguistics: (1) expand our conceptualization of research ethics to include ethical gray‐zone issues, (2) be thorough and explicit in our discussion of ethical issues related to research decisions, and (3) incorporate research ethics as a recurring theme throughout textbooks and courses.
Digital twin‐driven online intelligent assessment of wind turbine gearbox
Authors: Zhou Yadong , Zhou Jianxing , Cui Quanwei , Wen Jianmin , Fei Xiang 
Published: May 2024

AbstractRemaining useful fatigue life monitoring of wind turbine drivetrains is important. However, the implementation of real‐time monitoring often faces efficiency and accuracy challenges. In order to resolve this, this paper proposes a vibration‐based damage monitoring digital twin (VBDM‐DT) that enables the online intelligent evaluation of wind turbine gearboxes, using gear tooth surface durability as an example fatigue mode. The VBDM‐DT integrates a random wind load model, a high‐fidelity dynamics model, and a fatigue damage model. The random wind load model takes the wind speed from the supervisory control and data acquisition (SCADA) as input to estimate the input torque of the drivetrain in real time. Simultaneously, VBDM‐DT uses the vibration signals from the condition monitoring system (CMS) to intelligently calibrate the dynamics model, allowing it to be continuously adjusted and optimized in response to actual vibrations. The fatigue damage model takes the real‐time dynamic loads estimated by the high‐fidelity dynamic model as input to achieve real‐time fatigue damage monitoring of key components in the wind turbine gearbox. Applying the VBDM‐DT model to a 2 MW wind turbine gearbox, the results indicate that the model provides satisfactory accuracy in estimating input loads and good adaptability in intelligent calibration of the dynamic model. Based on this model, the fatigue life estimation for gears and bearings is more credible and reliable.
Multi‐dimensional parametric study for enhancing Brackish Water Reverse Osmosis membrane performance suited for desalination of low salinity feeds
Authors: Thummar Utpal G. , Amaliar Govind , Sutariya Bhaumik , Singh Puyam S. 
Published: May 2024

AbstractReverse osmosis (RO) effectively provides clean drinking water. Different RO membrane types are tailored to treat saline water feeds with varying characteristics. In the context of low brackish water feeds, the objective is to remove only a minimal excess of salinity through the membrane. Our study introduces a method of membrane post‐treatments capable of achieving controlled salt rejection while concurrently enhancing permeate flux, which is vital for achieving effective and energy‐efficient desalination of low brackish water. The post‐treatments were conducted on our in‐house‐developed membranes using aqueous solutions of N,N‐Dimethylformamide and glycerol for different drying times at the coupon level. The process was scaled up at the module level, allowing us to assess its potential for commercial application. At the coupon level, the permeate flux increased significantly from 3.7 ± 0.9 to 10.6 ± 0.2 L/m2·h·bar, while the salt rejection decreased from 95.6 ± 1% to 70.5 ± 1% when measured with a feed of 2,000 ppm NaCl concentration. At the module level, we observed a higher flux of 12.8 L/m2·h·bar, alongside a salt rejection of 55.5% with a similar feed. Varying post‐treatment parameters at the coupon level allowed us to attain the desired salt rejection and permeate flux values. Physical changes in both pristine and post‐treated membranes, including polymer swelling, were observed without chemical alterations, enhancing our understanding of the post‐treatment effect and its potential for broader commercial use.Practitioner Points

Post‐treatment of RO membranes enhances flux.
Physical structuring through polymer swelling was observed with the chemical structure unaltered.
Post‐treatment of RO opens doors for broader energy‐efficient desalination application.
Duality defects in Dn-type Niemeier lattice CFTs
Authors: Grover Sachin , Hegde Subramanya , Jatkar Dileep P. 
Published: May 2024

Abstract
We discuss the construction of duality defects in c = 24 meromorphic CFTs that correspond to Niemeier lattices. We will illustrate our constructions for the Dn-type lattices. We will identify non-anomalous ℤ2 symmetries of these theories, and we show that on orbifolding with respect to these symmetries, these theories map to each other. We investigate this map, and in the case of self-dual orbifolds, we provide the duality defect partition functions. We show that exchange automorphisms in some CFTs give rise to a new class of defect partition functions.
Baryogenesis through asymmetric reheating in the mirror twin Higgs
Authors: Alonso-Álvarez Gonzalo , Curtin David , Rasovic Andrija , Yuan Zhihan 
Published: May 2024

Abstract
We present the νϕMTH, a Mirror Twin Higgs (MTH) model realizing asymmetric reheating, baryogenesis and twin-baryogenesis through the out-of-equilibrium decay of a right-handed neutrino without any hard $${\mathbb{Z}}_{2}$$ breaking. The MTH is the simplest Neutral Naturalness solution to the little hierarchy problem and predicts the existence of a twin dark sector related to the Standard Model (SM) by a $${\mathbb{Z}}_{2}$$ symmetry that is only softly broken by a higher twin Higgs vacuum expectation value. The asymmetric reheating cools the twin sector compared to the visible one, thus evading cosmological bounds on ∆Neff. The addition of (twin-)colored scalars allows for the generation of the visible baryon asymmetry and, by the virtue of the $${\mathbb{Z}}_{2}$$ symmetry, also results in the generation of a twin baryon asymmetry. We identify a unique scenario with top-philic couplings for the new scalars that can satisfy all cosmological, proton decay and LHC constraints; yield the observed SM baryon asymmetry; and generate a wide range of possible twin baryon DM fractions, from negligible to unity. The viable regime of the theory contains several hints as to the possible structure of the Twin Higgs UV completion. Our results motivate the search for the rich cosmological and astrophysical signatures of twin baryons, and atomic dark matter more generally, at cosmological, galactic and stellar scales.
Pseudo entropy and pseudo-Hermiticity in quantum field theories
Authors: Guo Wu-zhong , Jiang Yao-zong 
Published: May 2024

Abstract
In this paper, we explore the concept of pseudo Rényi entropy within the context of quantum field theories (QFTs). The transition matrix is constructed by applying operators situated in different regions to the vacuum state. Specifically, when the operators are positioned in the left and right Rindler wedges respectively, we discover that the logarithmic term of the pseudo Rényi entropy is necessarily real. In other cases, the result might be complex. We provide direct evaluations of specific examples within 2-dimensional conformal field theories (CFTs). Furthermore, we establish a connection between these findings and the pseudo-Hermitian condition. Our analysis reveals that the reality or complexity of the logarithmic term of pseudo Rényi entropy can be explained through this pseudo-Hermitian framework.Additionally, we investigate the divergent term of the pseudo Rényi entropy. Interestingly, we observe a universal divergent term in the second pseudo Rényi entropy within 2-dimensional CFTs. This universal term is solely dependent on the conformal dimension of the operator under consideration. For n-th pseudo Rényi entropy (n ≥ 3), the divergent term is intricately related to the specific details of the underlying theory.
Characterization and functional evidence for Orf2 of Streptomyces sp. 139 as a novel dipeptidase E
Authors: Liu Zhe , Li Kemeng , Li Jialin , Zhuang Zhuochen , Guo Lianhong , Bai Liping 
Published: May 2024

Abstract
Aspartyl dipeptidase (dipeptidase E) can hydrolyze Asp-X dipeptides (where X is any amino acid), and the enzyme plays a key role in the degradation of peptides as nutrient sources. Dipeptidase E remains uncharacterized in Streptomyces. Orf2 from Streptomyces sp. 139 is located in the exopolysaccharide biosynthesis gene cluster, which may be a novel dipeptidase E with “S134-H170-D198” catalytic triad by sequence and structure comparison. Herein, recombinant Orf2 was expressed in E. coli and characterized dipeptidase E activity using the Asp-ρNA substrate. The optimal pH and temperature for Orf2 are 7.5 and 40 ℃; Vmax and Km of Orf2 are 0.0787 mM·min−1 and 1.709 mM, respectively. Orf2 exhibits significant degradation activities to Asp-Gly-Gly, Asp-Leu, Asp-His, and isoAsp-Leu and minimal activities to Asp-Pro and Asp-Ala. Orf2 contains a Ser-His-Asp catalytic triad characterized by point mutation. In addition, the Asp147 residue of Orf2 is also proven to be critical for the enzyme’s activity through molecular docking and point mutation. Transcriptome analysis reveals the upregulation of genes associated with ribosomes, amino acid biosynthesis, and aminoacyl-tRNA biosynthesis in the orf2 mutant strain. Compared with the orf2 mutant strain and WT, the yield of crude polysaccharide does not change significantly. However, crude polysaccharides from the orf2 mutant strain exhibit a wider range of molecular weight distribution. The results indicate that the Orf2 links nutrient stress to secondary metabolism as a novel dipeptidase E.

Key points
• A novel dipeptidase E with a Ser-His-Asp catalytic triad was characterized from Streptomyces sp. 139.
• Orf2 was involved in peptide metabolism both in vitro and in vivo.
• Orf2 linked nutrient stress to mycelia formation and secondary metabolism in Streptomyces.
Prediction of long-term visual outcome of idiopathic full-thickness macular hole surgery using optical coherence tomography parameters that estimate potential preoperative photoreceptor damage
Authors: Bajdik Beáta , Vajas Attila , Kemenes Gréta , Fodor Mariann , Surányi Éva , Takács Lili 
Published: May 2024

Abstract
Purpose
To identify optical coherence tomography (OCT) parameters that predict postoperative best corrected visual acuity (BCVA) and are based on recent understanding of the pathomechanism of idiopathic full thickness macular hole (iFTMH) formation and closure.

Methods
A retrospective consecutive case series of patients who had macular hole (MH) surgery at our institution between 2016 and 2022 was performed. 32 eyes of 30 patients were selected with at least 12 months of follow-up, closed MH and good quality OCT at each visit. Univariate correlation analysis, multiple logistic regression with forward stepwise selection, and Akaike’s Information Criterion (AIC) were used to identify the best predictors for postoperative BCVA at 6 and 12 months (M), and final (≥ 12 M) visits, and a new OCT index was created. Abilities of best models/indices to predict < 0.30 logMAR (> 20/40) BCVA were compared to macular hole index (MHI) using the area under the receiver operating curve (AU-ROC) analysis.

Results
Statistical analysis revealed base diameter (B) (6 M), preoperative BCVA and B (12 M) and smaller ELM-GCL distance (A), and B (final visit) as predictors for postoperative BCVA. AU-ROC analysis indicated greatest AUC at 6 M for MHI and B (0.797, p = 0.004 and 0.836 p = 0.001, respectively) and for the new A/B index at 12 M and final visit (0.844, p = 0.002 and 0.913, p = 0.003, respectively).

Conclusion
Our study suggests that MHI and B can be useful predictors of short term BCVA while the new A/B index that incorporates OCT parameters indicating potential preoperative photoreceptor damage may be a good predictor for long term postoperative BCVA. Our findings support the theory that initial hole formation mechanisms and photoreceptor damage define visual prognosis.
Role played by MDSC in colitis-associated colorectal cancer and potential therapeutic strategies
Authors: Wang Kang , Wang Yun , Yin Kai 
Published: May 2024

AbstractColitis-associated colorectal cancer has been a hot topic in public health issues worldwide. Numerous studies have demonstrated the significance of myeloid-derived suppressor cells (MDSCs) in the progression of this ailment, but the specific mechanism of their role in the transformation of inflammation to cancer is unclear, and potential therapies targeting MDSC are also unclear. This paper outlines the possible involvement of MDSC to the development of colitis-associated colorectal cancer. It also explores the immune and other relevant roles played by MDSC, and collates relevant targeted therapies against MDSC. In addition, current targeted therapies for colorectal cancer are analyzed and summarized.