bluuebunny/crossref_metadata_2025_split huggingface dataset:
Water‐Pillared Sodium Vanadium Bronze Nanowires for Enhanced Rechargeable Magnesium Ion Storage
Authors: Sun Ruimin , Ji Xiao , Luo Chao , Hou Singyuk , Hu Ping , Pu Xiangjun , Cao Longsheng , Mai Liqiang , Wang Chunsheng 
Published: June 2020

AbstractOwing to the advantages of high safety, low cost, high theoretical volumetric capacities, and environmental friendliness, magnesium‐ion batteries (MIBs) have more feasibility for large‐scale energy storage compared to lithium‐ion batteries. However, lack of suitable cathode materials due to sluggish kinetics of magnesium ion is one of the biggest challenges. Herein, water‐pillared sodium vanadium bronze nanowires (Na2V6O16·1.63H2O) are reported as cathode material for MIBs, which display high performance in magnesium storage. The hydrated sodium ions provide excellent structural stability. The charge shielding effect of lattice water enables fast Mg2+ diffusion. It exhibits high specific capacity of 175 mAh g−1, long cycle life (450 cycles), and high coulombic efficiency (≈100%). At high current density of 200 mA g−1, the capacity retention is up to 71% even after 450 cycles (compared to the highest capacity), demonstrating excellent long‐term cycling performance. The nature of charge storage kinetics is explored. Furthermore, a highly reversible structure change during the electrochemical process is proved by comprehensive electrochemical analysis. The remarkable electrochemical performance makes Na2V6O16·1.63H2O a promising cathode material for low‐cost and safe MIBs.
De‐motivators for the adoption of agile methodologies for large‐scale software development teams: An SLR from management perspective
Authors: Faisal Abrar Muhammad , Sohail M. , Ali Sikandar , Faran Majeed Muhammad , Ali Shah Ibrar , Rashid Nasir , Ullah Naimat 
Published: June 2020

AbstractMost of the software development projects have traditionally been faced with severe problems in terms of quality, cost, and time. Researchers and practitioners have focused on agile software development methods (ASDMs) as an alternative to overcome these problems. Agile methods employ iterative development cycles, interspersed by user feedback. Agile methods were basically developed for small development teams. Scaling agile methods is a big issue from different perspectives. De‐motivators play a key role in project management as it allows early identification and prompt management of threats that may arise during project execution. The objective of this paper is to identify the de‐motivators while scaling agile at large, from management perspectives. We have adapted SLR and applied contrived search criteria derived from the research questions, followed by selecting the required research papers, data extraction, and data synthesis, which resulted in 15 de‐motivators from 58 relevant papers. Some of the identified de‐motivators are ‘traditional organizational culture’, ‘lack of agile experts’, ‘reluctance to adopt’, and ‘lack of management and commitment support’. The identified factors have been compared from various perspectives, such as continents, digital libraries, organization size, and so forth.
Genome‐wide association study identifies five new cadmium uptake loci in wheat
Authors: Safdar Luqman Bin , Almas Fakhrah , Sarfraz Sidra , Ejaz Muhammad , Ali Zeshan , Mahmood Zahid , Yang Li , Tehseen Muhammad Massub , Ikram Muhammad , Liu Shengyi , Quraishi Umar Masood 
Published: June 2020

AbstractCadmium (Cd) toxicity is a serious threat to future food security and health safety. To identify genetic factors contributing to Cd uptake in wheat, we conducted a genome‐wide association study with genotyping from 90K SNP array. A spring wheat diversity panel was planted under normal conditions and Cd stress (50 mg Cd/kg soil). The impact of Cd stress on agronomic traits ranged from a reduction of 16% in plant height to 93% in grain iron content. Individual genotypes showed a considerable variation for Cd uptake and translocation subdividing the panel into three groups: (1) hyper‐accumulators (i.e. high Leaf_Cd and low Seed_Cd), (2) hyper‐translocators (i.e. low Leaf_Cd and high Seed_Cd), and (3) moderate lines (i.e. low Leaf_Cd and low Seed_Cd). Two lines (SKD‐1 and TD‐1) maintained an optimum grain yield under Cd stress and were therefore considered as Cd resistant lines. Genome‐wide association identified 179 SNP‐trait associations for various traits including 16 for Cd uptake at a significance level of P < .001. However, only five SNPs were significant after applying multiple testing correction. These loci were associated with seed‐cadmium, grain‐iron, and grain‐zinc: qSCd‐1A, qSCd‐1D, qZn‐2B1, qZn‐2B2, and qFe‐6D. These five loci had not been identified in the previously reported studies for Cd uptake in wheat. These loci and the underlying genes should be further investigated using molecular biology techniques to identify Cd resistant genes in wheat.
Degradation of polyurethane coating containing graphene oxide under effect of UV radiation
Authors: Duong Nguyen Thuy , An Tran Boi , Oanh Vu Ke , Vu Pham Gia , Thao Phan Thanh , Hang To Thi Xuan 
Published: June 2020

AbstractThis study investigates the durability of polyurethane coating containing graphene oxide under UV radiation. In this work, graphene oxide (GO), as an UV absorber, was fabricated by Hummer's method. The structure and morphology of GO were characterized by Fourier transform infrared spectroscopy (FT‐IR), Field emission scanning electron microscopy (FESEM) and Ultraviolet‐vision spectroscopy (UV‐Vis). The results showed that GO with layered structure was successfully synthesized. GO was incorporated into polyurethane coating at a concentration of 0.1 wt.%. Gloss measurement, colorimetric measurement and electrochemical techniques were used to evaluate the degradation of polyurethane coating containing GO after exposure to QUV test. The results indicated that presence of GO enhanced the UV durability of polyurethane coating.
Stilbenes from Macaranga tanarius (Euphorbiaceae) growing in Vietnam
Authors: Huong Doan Thi Mai , Linh Nguyen Thuy , Van Trinh Thi Thanh , Litaudon Marc , Roussi Fanny , Van Nam Vu , Van Cuong Pham 
Published: June 2020

AbstractMacaranga tanarius is a medium‐sized tree that is widespread in the Southeast Asian and western Pacific regions. The ethyl acetate extract of this species was showed cytotoxic activity against KB cancer cell line. In this article, we report the isolation and structural elucidation of four known stilbenes from fruit glandular trichomes of M. tanarius including vedelianin (1), schweinfurthins E‐G (2‐4). The structures of the isolated compounds were elucidated from their mass and NMR spectral data. Cytotoxic activity of the isolated compounds (1‐4) against KB cell line was also discussed.
Antimicrobacterial xanthones from Garcinia mackeaniana leaves
Authors: Ha Nguyen Thi Thu , Van Cuong Pham , Anh Le Thi Tu , Tra Nguyen Thanh , Cham Ba Thi , Son Ninh The 
Published: June 2020

AbstractA phytochemical study of the EtOAc extract of Garcinia mackeaniana leaves has resulted in the isolation and determination of five xanthones, consisting of norathyriol (1), mangiferin (2), allanxanthone C (3), garcinone E (4), and bannanxanthone E (5). The structures of these xanthones have been determined by NMR‐spectra and MS spectroscopic data. These isolated compounds were separated from G. mackeaniana species for the first time. In the antimicrobacterial assay against the growth of bacterium Staphylococcus aureus, compounds 3‐4 showed the significant IC50 values of 5.41, and 4.29 μM/mL, respectively.
Enhancing Navigation in Difficult Environments with Low-Cost, Dual-Frequency GNSS PPP and MEMS IMU
Authors: Vana Sudha , Bisnath Sunil 
Published: June 2020

AbstractThe Global Navigation Satellite System (GNSS) Precise Point Positioning (PPP) technology benefits from not needing local ground infrastructure such as reference stations and accuracy attained is at the decimetre-level, which approaches real-time kinematic (RTK) performance. However, due to its long position solution initialization period and complete dependence on the receiver measurements, PPP finds limited utility. The emergence of low-cost, micro-electro-mechanical sensor (MEMS) inertial measurement units (IMUs) has prompted research in integrated navigation solutions with the PPP processing technique. This sensor fusion aids to achieve continuous positioning and navigation solution availability when there are insufficient numbers of navigation satellites visible. In the past, research has been conducted to integrate high-end (geodetic) GNSS receivers with PPP processing and MEMS IMUs, or low-cost, single-frequency GNSS receivers with point positioning processing and MEMS IMUs. The objective of this research is to investigate and analyze position solution availability and continuity by integrating low-cost, dual-frequency GNSS receivers using PPP processing with the latest low-cost, MEMS IMUs to offer a complete, low-cost navigation solution that will enable continuously available positioning and navigation solutions, even in obstructed environments. The horizontal accuracy of the developed low-cost, dual-frequency GNSS PPP with MEMS IMU integrated algorithm is approximately 20 cm. During half a minute of simulated GNSS signal outage, the integrated solution offers 40 cm horizontal accuracy. A low-cost, dual-frequency GNSS receiver PPP solution integrated with a MEMS IMU forms a unique combination of a total low-cost solution, that will open a significant new market window for modern-day applications such as autonomous vehicles, drones and augmented reality.
On the ARCH model with stationary liquidity
Authors: Voutilainen Marko , Ilmonen Pauliina , Torres Soledad , Tudor Ciprian , Viitasaari Lauri 
Published: June 2020

AbstractThe classical ARCH model together with its extensions have been widely applied in the modeling of financial time series. We study a variant of the ARCH model that takes account of liquidity given by a positive stationary process. We provide minimal assumptions that ensure the existence and uniqueness of the stationary solution for this model. Moreover, we give necessary and sufficient conditions for the existence of the autocovariance function. After that, we derive an AR(1) characterization for the stationary solution yielding Yule–Walker type quadratic equations for the model parameters. In order to define a proper estimation method for the model, we first show that the autocovariance estimators of the stationary solution are consistent under relatively mild assumptions. Consequently, we prove that the natural estimators arising out of the quadratic equations inherit consistency from the autocovariance estimators. Finally, we illustrate our results with several examples and a simulation study.
The Dilemma After an Unforeseen Positive Sentinel Node in Primary Breast Cancer: Is Completion Axillary Dissection Necessary?
Authors: van Bekkum S. , Kraima A. C. , Westenend P. J. , Plaisier P. W. , Menke‐Pluijmers M. B. E. 
Published: June 2020

AbstractBackgroundIn the majority of cases, the sentinel node is the only positive node in the axilla and completion ALND (cALND) is a futile procedure. However, refraining from cALND will lead to less accurate staging and, possibly, undertreatment. To help resolve this dilemma, we examined the clinical value of cALND in staging and determining adjuvant treatment.MethodsIn a retrospective cohort, all consecutive patients over a five‐year period with primary breast cancer who received ALND were identified and grouped based on timing of ALND. Total nodal yield and positive lymph nodes were defined and factors with possible impact identified. In the case of cALND, N‐status upstaging and possible impact on adjuvant treatment were studied in detail.ResultsA total of 280 patients were selected of whom 204 underwent primary ALND (pALND) and 76 cALND. pALND resulted in a significantly higher total nodal yield and more positive nodes when compared to cALND (p = 0.003, and p < 0.001, respectively). Neoadjuvant chemotherapy (NAC) had no effect on total nodal yield (p = 0.413), but resulted in fewer positive nodes (p < 0.001). Due to the results of cALND, only 11 patients (14%) had upstaging of N‐status. All these patients were advised more extensive adjuvant radiotherapy.ConclusionIn the majority of patients, cALND does not lead to upstaging. cALND should be performed only after a careful discussion with the patient about the pros and cons of this procedure, and most probably only in the presence of multiple risk factors for axillary disease in the absence of systemic therapy.
Information filtering by coincidence detection of synchronous population output: analytical approaches to the coherence function of a two-stage neural system
Authors: Bostner Žiga , Knoll Gregory , Lindner Benjamin 
Published: June 2020

AbstractInformation about time-dependent sensory stimuli is encoded in the activity of neural populations; distinct aspects of the stimulus are read out by different types of neurons: while overall information is perceived by integrator cells, so-called coincidence detector cells are driven mainly by the synchronous activity in the population that encodes predominantly high-frequency content of the input signal (high-pass information filtering). Previously, an analytically accessible statistic called the partial synchronous output was introduced as a proxy for the coincidence detector cell’s output in order to approximate its information transmission. In the first part of the current paper, we compare the information filtering properties (specifically, the coherence function) of this proxy to those of a simple coincidence detector neuron. We show that the latter’s coherence function can indeed be well-approximated by the partial synchronous output with a time scale and threshold criterion that are related approximately linearly to the membrane time constant and firing threshold of the coincidence detector cell. In the second part of the paper, we propose an alternative theory for the spectral measures (including the coherence) of the coincidence detector cell that combines linear-response theory for shot-noise driven integrate-and-fire neurons with a novel perturbation ansatz for the spectra of spike-trains driven by colored noise. We demonstrate how the variability of the synaptic weights for connections from the population to the coincidence detector can shape the information transmission of the entire two-stage system.
Given that the detailed original criteria for deliberate practice have not changed, could the understanding of this complex concept have improved over time? A response to Macnamara and Hambrick (2020)
Authors: Ericsson K. Anders 
Published: June 2020

AbstractIn their commentary, Macnamara and Hambrick (Psychol Res, 2017) accused my colleagues and me of systematically changing the definition of the concept of deliberate practice. Deliberate practice was the result of a search for characteristics of effective practice in the laboratory that was shown to improve expert professional performance in domains, such as music. In this reply, I will first describe five different criteria that defined the original concept of deliberate practice and each of them is presented with directly supporting quotes from Ericsson, Krampe, and Tesch-Römer (Psychol Rev 100:396–406, 10.1037/0033-295X.87.3.215, 1993) paper. Unfortunately, Macnamara, Hambrick, and Oswald (Psychol Sci 25:1608–1618, 10.1177/0956797614535810, 2014) misinterpreted our concept of deliberate practice, and defined it much more broadly: “as engagement in structured activities created specifically to improve performance in a domain” (p. 914). This definition led them to include activities, such as attending lectures, studying alone by students, and group activities led by a coach, where each activity does not meet one or more of our criteria for deliberate practice. In this commentary, I will argue that Macnamara and Hambrick (2020) became aware of some of the original criteria for deliberate practice, such as the role of individualized training by a teacher, and these discoveries misled them to assume that we had changed our definition. The intended meaning of sentences that Macnamara and Hambrick (2020) had carefully selected is shown to have an appropriate interpretation in Standard English that is consistent with our original definition of deliberate practice. In conclusion, I will give a proposal for how the different perspectives can be reconciled.
Paradoxical response of intracranial pressure to shunt valve setting adjustments
Authors: D’Antona Linda , Craven Claudia Louise , Merchan Melida Andrea Jaime , Thompson Simon David , Bremner Fion , Thorne Lewis , Matharu Manjit Singh , Watkins Laurence Dale , Toma Ahmed Kassem 
Published: June 2020

Abstract
Background
The hydrodynamics of cerebrospinal fluid shunts have been described in vitro; however, knowledge on the response of intracranial pressure (ICP) to valve settings adjustments in vivo is limited. This study describes the effect of adjusting the shunt valve setting on ICP in a cohort of patients with complex symptom management.

Method
Single-centre retrospective observational study. Patients who underwent ICP-guided valve setting adjustments during 24-h continuous ICP monitoring, between 2014 and 2019, were included. Patients with suspected shunt malfunction were excluded. Median night ICP before and after the valve adjustments were compared (Δ night ICP). The responses of ICP to valve adjustment were divided into 3 different groups as follows: expected, paradoxical and no response. The frequency of the paradoxical response and its potential predicting factors were investigated.

Results
Fifty-one patients (37 females, 14 males, mean age 38 years) receiving 94 valve setting adjustments met the study inclusion criteria. Patients’ underlying conditions were most commonly hydrocephalus (47%) or idiopathic intracranial hypertension (43%). The response of ICP to valve setting adjustments was classified as ‘expected’ in 54 cases (57%), ‘paradoxical’ in 17 cases (18%) and ‘no effect’ (Δ night ICP < 1 mmHg) in 23 cases (24%). There was a significant correlation between the Δ night ICP and the magnitude of valve setting change in both the investigated valves (Miethke ProGAV, p = 0.01 and Medtronic Strata, p = 0.02).

Conclusions
Paradoxical ICP changes can occur after shunt valve setting adjustments. This observation should be taken into account when performing ICP-guided valve adjustments and is highly relevant for the future development of “smart” shunt systems.
Phosphorus-Based Ionic Liquid as Dual Function Promoter Oriented Synthesis of Efficient VPO Catalyst for Selective Oxidation of n-butane
Authors: Dai Fei , Shi Yanan , Zhang Ting , Faizan Muhammad , Li Zihang , Zhang Ruirui , Liu Ruixia , Zhang Suojiang 
Published: June 2020

Abstract
Vanadium phosphorus oxide (VPO) catalysts promoted by phosphorus-based ionic liquids (ILs) as structure directing agent and promoters have been innovatively synthesized and investigated for selective oxidation of n-butane to maleic anhydride (MA). The catalytic performances showed that the IL addition notably improved the n-butane conversion and MA selectivity, during which the optimized 3%IL-VPO catalyst exhibited the maximum MA yield of 59.2% that is much better than that of blank VPO with 49.4% MA yield under the same reaction conditions. XRD, FI-IR, Raman, SEM, TG, BET, XPS and H2-TPR techniques were utilized combinatorically to elaborate the synergistic effect of cations and anions of ILs. Results demonstrated that IL-cations oriented synthesis of VPO precursor showing a vertically intercrossed slice structure morphology having smaller lamellar thickness. Correspondingly, it notably enhanced the specific surface area of the VPO catalysts and exposed the more active surface of (VO)2P2O7 after activation. Meanwhile, IL-anions as promoters largely modulated the P/V ratio, valence state of V and oxygen species amounts on the surface of VPO catalyst, etc. All of these influence factors were subsequently discussed in detail and correlated to the catalytic performance of VPO catalysts.

Graphic Abstract
A cautionary note on “exothermic events” upon contact of carbodiimide coupling agents and the cellulose solvent N-methylmorpholine-N-oxide
Authors: Jusner Paul , Aoki Masaaki , Potthast Antje , Rosenau Thomas 
Published: June 2020

Abstract
The cellulose solvent N-methylmorpholine-N-oxide monohydrate (NMMO) reacts violently with carbodiimide coupling agents, such as the widely used DCC (dicyclohexylcarbodiimide) and EDC (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide), which can cause explosions, heavy smoke generation and complete charring of the reaction mixtures. For this reason it is clear that cellulose or other carbohydrates dissolved in NMMO (“Lyocell conditions”) cannot be safely esterified or amidified under DCC/EDC conditions. It is important to note that cellulosic material regenerated from NMMO solutions also poses a risk if it contains residual NMMO, which can then come into contact with DCC-type coupling agents in non-aqueous media, as recent accidents have unfortunately shown. Similarly, EDC/DCC traces in cellulose can have detrimental effects when trying to dissolve the material in NMMO. Working in aqueous systems generally reduces the risk of uncontrolled reactions, while alcohols or aprotic solvents are not very effective in this regard. Washing for NMMO removal or EDC/DCC removal should therefore always be carried out by aqueous media, if any possible, if there is a potential risk that the reagents might come into contact later. This warning describes the potential hazards of the reagent combination, highlights the underlying degradation mechanism and explains the precautions to be taken to avoid any “exothermic events”.

Graphic abstract
Anthropogenic and natural size-related selection act in concert during brown trout (Salmo trutta) smolt river descent
Authors: Haraldstad Tormod , Höglund Erik , Kroglund Frode , Olsen Esben M. , Hawley Kate L. , Haugen Thrond O. 
Published: June 2020

AbstractBy hindering migration and inducing direct turbine mortality during downstream migration, hydropower is regarded as one of the most serious threats to anadromous salmonids. Yet, little attention has been paid to long-term turbine-induced selection mechanisms effecting fish populations. This work evaluates turbine and post-turbine survival of PIT-tagged wild brown trout smolts. By estimating individual river and sea survival rates, we were able to compare survival rates of smolts that had migrated through the turbine with smolts that had bypassed the turbine, as well as investigate both natural and anthropogenic size-selective mechanisms operative on the population. Total river-descent survival probability was 0.20 for turbine migrants and 0.44 for bypass migrants. The surviving turbine migrants were significantly smaller than their bypass counterparts and more exposed to predation from Northern pike. The estimated mean-adjusted selection gradient was − 0.76 for turbine migrants and + 1.85 for the bypass migrants. The resulting disruptive selection may ultimately lead to increased phenotypic smolt size variation provided sufficient additive genetic variance associated with smolt size. Mitigation measures at hydropower plants are thus essential for preserving sustainable populations of anadromous fish and maintaining population genetic variation.