bluuebunny/crossref_metadata_2025_split huggingface dataset:
CO hydrogenation over K‐Co‐MoSxcatalyst to mixed alcohols: A kinetic analysis
Authors: Negahdar Leila , Xi Xiaoying , Zeng Feng , Winkelman J. G. M. , Heeres Hero Jan , Palkovits Regina 
Published: November 2020

AbstractHigher alcohol synthesis (HAS) from syngas is one of the most promising approaches to produce fuels and chemicals. Our recent investigation on HAS showed that potassium‐promoted cobalt‐molybdenum sulfide is an effective catalyst system. In this study, the intrinsic kinetics of the reaction were studied using this catalyst system under realistic conditions. The study revealed the major oxygenated products are linear alcohols up to butanol and methane is the main hydrocarbon. The higher alcohol products (C3+) followed an Anderson‐Schultz‐Flory distribution while the catalyst suppressed methanol and ethanol formation. The optimum reaction conditions were estimated to be at temperature of 340°C, pressure of 117 bar, gas hourly space velocity of 27 000 mL g–1 h–1and H2/CO molar feed ratio of 1. A kinetic network has been considered and kinetic parameters were estimated by nonlinear regression of the experimental data. The results indicated an increasing apparent activation energy of alcohols with the length of alcohols except for ethanol. The lower apparent activation energy of alcohols compared with hydrocarbon evidenced the efficiency of this catalyst system to facilitate the formation of higher alcohols.
3D Printing of Bone‐Mimetic Scaffold Composed of Gelatin/β‐Tri‐Calcium Phosphate for Bone Tissue Engineering
Authors: Jeong Jae Eun , Park Shin Young , Shin Ji Youn , Seok Ji Min , Byun June Ho , Oh Se Heang , Kim Wan Doo , Lee Jun Hee , Park Won Ho , Park Su A 
Published: November 2020

Abstract3D printed scaffolds composed of gelatin and β‐tri‐calcium phosphate (β‐TCP) as a biomimetic bone material are fabricated, thereby providing an environment appropriate for bone regeneration. The Ca2+in β‐TCP and COO−in gelatin form a stable electrostatic interaction, and the composite scaffold shows suitable rheological properties for bioprinting. The gelatin/β‐TCP scaffold is crosslinked with glutaraldehyde vapor and unreacted aldehyde groups which can cause toxicity to cells is removed by a glycine washing. The stable binding of the hydrogel is revealed as a result of FTIR and degradation rate. It is confirmed that the composite scaffold has compressive strength similar to that of cancellous bone and 60 wt% β‐TCP groups containing 40 wt% gelatin have good cellular activity with preosteoblasts. Also, in the animal experiments, the gelatin/β‐TCP scaffold confirms to induce bone formation without any inflammatory responses. This study suggests that these fabricated scaffolds can serve as a potential bone substitute for bone regeneration.
Facile Fabrication of Poly(vinyl alcohol)/Polyquaternium‐10 (PVA/PQ‐10) Anion Exchange Membrane with Semi‐Interpenetrating Network
Authors: Yang Zhaojie , Zhang Minghua , Xiao Yafei , Zhang Xi , Fan Minmin 
Published: November 2020

AbstractAnion exchange membranes (AEMs) are one of the core components of AEM fuel cells. A series of poly(vinyl alcohol)/polyquaternium‐10 (PVA/PQ‐10) AEMs with semi‐interpenetrating networks (s‐IPNs) are prepared by a simple solution‐casting method using glutaraldehyde (GA) as a cross‐linking agent. Subsequently, the prepared PVA/PQ‐10 cross‐linked membranes are characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, mechanical analysis, water uptake and swelling ratio tests, ion exchange capacity (IEC) tests, ionic conductivity measurements, and oxidative/alkaline stability tests. The effects of the mass ratio of PVA and PQ‐10 and the amount of cross‐linking agent GA on the performance of the PVA/PQ‐10 cross‐linked membranes are systematically explored. The results show that the cross‐linked PVA/PQ‐10 AEMs have high IEC and low water uptake and swelling ratio, and its maximum ionic conductivity can reach 79.37 mS cm–1 at 80 °C. In addition, the PVA/PQ‐10 cross‐linked membrane has good oxidative and alkaline stability under optimal preparation conditions. These results may provide valuable insights toward more effective scheme designs and new, simple preparation methods for AEMs with s‐IPN structures.
RNF170‐Related Hereditary Spastic Paraplegia: Confirmation by a Novel Mutation
Authors: de Sainte Agathe Jean‐Madeleine , Mercier Sandra , Mahé Jean‐Yves , Péréon Yann , Buratti Julien , Tissier Laurène , Kol Bophara , Said Samia Ait , Leguern Éric , Banneau Guillaume , Stévanin Giovanni 
Published: November 2020

ABSTRACTBackgroundSpastic paraparesis and biallelic variants functionally characterized as deleterious in the RNF170 gene have recently been reported by Wagner et al. 2019, strongly supporting the involvement of this gene in hereditary spastic paraplegia.MethodsExome sequencing was performed on 6 hereditary spastic paraplegia families previously tested on an hereditary spastic paraplegia–specific panel.ResultsWe describe here a novel hereditary spastic paraplegia family with 4 affected members carrying a homozygous p.(Tyr114*) stop gain variant in RNF170.ConclusionsWe confirm the involvement of biallelic truncating variants in RNF170 in a novel form of hereditary spastic paraplegia. © 2020 International Parkinson and Movement Disorder Society
Tungsten doped Bi1.5Zn0.92Nb1.5O6.92 ceramics designed as radio/microwave band pass/reject filters
Authors: Qasrawi Atef F. , Abdalghafour Mays A. , Mergen A. 
Published: November 2020

AbstractHerein, radiowave/microwave bandpass/reject filters are fabricated from the tungsten doped Bi1.5Zn0.92Nb1.5‐6x/5WxO6.92 (W‐BZN) pyrochlore ceramics. The W‐BZN band filters are prepared by the solid state reaction technique and subjected to X‐ray diffraction (XRD) and impedance spectroscopy analyses. It was shown that the W‐BZN filters can display negative capacitance effects accompanied with resonance‐antiresonance oscillations. The calculations of the reflection coefficient parameter (S11), the return loss (Lr) and the voltage standing wave ratios (VSWR) in the frequency domain of 0.01 to 1.80 GHz, has shown that the W‐BZN device can perform as microwave cavities at two notch frequency values of 0.44 and 1.53 GHz. W‐BZN devices can also be nominated as noise reducers and radiowave/microwave signal receivers suitable for telecommunication technology.
Assessing the predictive ability of the Suicide Crisis Inventory for near‐term suicidal behavior using machine learning approaches
Authors: Parghi Neelang , Chennapragada Lakshmi , Barzilay Shira , Newkirk Saskia , Ahmedani Brian , Lok Benjamin , Galynker Igor 
Published: November 2020

AbstractObjectiveThis study explores the prediction of near‐term suicidal behavior using machine learning (ML) analyses of the Suicide Crisis Inventory (SCI), which measures the Suicide Crisis Syndrome, a presuicidal mental state.MethodsSCI data were collected from high‐risk psychiatric inpatients (N = 591) grouped based on their short‐term suicidal behavior, that is, those who attempted suicide between intake and 1‐month follow‐up dates (N = 20) and those who did not (N = 571). Data were analyzed using three predictive algorithms (logistic regression, random forest, and gradient boosting) and three sampling approaches (split sample, Synthetic minority oversampling technique, and enhanced bootstrap).ResultsThe enhanced bootstrap approach considerably outperformed the other sampling approaches, with random forest (98.0% precision; 33.9% recall; 71.0% Area under the precision‐recall curve [AUPRC]; and 87.8% Area under the receiver operating characteristic [AUROC]) and gradient boosting (94.0% precision; 48.9% recall; 70.5% AUPRC; and 89.4% AUROC) algorithms performing best in predicting positive cases of near‐term suicidal behavior using this dataset.ConclusionsML can be useful in analyzing data from psychometric scales, such as the SCI, and for predicting near‐term suicidal behavior. However, in cases such as the current analysis where the data are highly imbalanced, the optimal method of measuring performance must be carefully considered and selected.
Numerical simulation and modeling of entropy generation in Marangoni convective flow of nanofluid with activation energy
Authors: Khan M. Ijaz , Qayyum Sumaira , Chu Yu‐Ming , Kadry Seifedine 
Published: November 2020

AbstractIn this article, Marangoni convective flow of nanofluid is considered. Entropy generation minimization is also considered. Equations are constructed for Buongiorno model of nanofluid. Flow is generated by rotating disk. Activation energy, nonlinear mixed convection, and MHD effects are also taken in consideration. Ordinary differential equation is formed by using appropriate variables. Results are formed by using Shooting method. Results of temperature, axial velocity, entropy, radial velocity, concentration, and Bejan number are discussed through graphs. Radial and axial velocities are increasing functions of Marangoni ratio parameter. Temperature and concentration are decreasing functions of Marangoni ratio parameter. Entropy is increasing function of Marangoni ratio parameter. Bejan number declines via Marangoni ratio parameter.
On the numerical solution of conformable fractional diffusion problem with small delay
Authors: Bayrak Mine Aylin , Demir Ali , Ozbilge Ebru 
Published: November 2020

AbstractThis study investigates approximate solution of the time‐fractional Fisher equation with small delay by means of residual the residual power series method (RPSM). Since the delay term is small, the time fractional Fisher equation is expanded in powers series of delay term ϵ which allows to construct the approximate solution of time‐fractional of Fisher equation by means of RPSM. The obtained results illustrative examples show that the proposed method in this study is very powerful and efficient for the solution of the time‐fractional Fisher equation with small delay.
Approximate controllability results for Sobolev‐type delay differential system of fractional order without uniqueness
Authors: Vijayakumar V. , Udhayakumar R. , Zhou Yong , Sakthivel N. 
Published: November 2020

AbstractThe main aim of this article is to focus on approximate controllability for Sobolev‐type fractional control problems in Hilbert spaces without uniqueness. By using the fixed point theorem for multivalued maps with nonconvex values, the main results of our article are proved. Moreover, we obtain some results on the continuity of the solution map and the topological structure of the solution set of the considered Sobolev‐type fractional differential system. Finally, we provide a theoretical application to assist in the effectiveness of our discussion.
Psychological stress: Repercussions of COVID‐19 on gender
Authors: Ahuja Prerna , Syal Ginni , Kaur Amarjit 
Published: November 2020

The purpose of our study is to examine the effect of Coronavirus disease (COVID‐19) on psychological health of people specific to IES, mental health, family social support, lifestyle changes and also, to analyze the gender differences of perceiving and handling the psychological stress due to the COVID‐19. An online questionnaire was filled by 325 respondents. All the respondents of the study have an IES score ≥ 26, reflecting a powerful impact of the pandemic. However, females (IES = 39.99) were gravely effected due to the pandemic. 60% of the respondents felt horrified due to the pandemic. Majority of the respondents received support from friends and family members. In conclusion, females and the age group 31+ were severely impacted due to sudden health and lifestyle changes.
Evaluation of time to clearance of high‐dose methotrexate using the ARK immunoassay in pediatric hematology/oncology patients: A single‐center experience
Authors: Kowalski Kaitlyn E. , Higgins Tara A. 
Published: November 2020

AbstractA retrospective, single‐center, observational study evaluated the difference in time to clearance of high‐dose methotrexate between the fluorescence polarization immunoassay (FPIA) and ARK methotrexate assay in pediatric hematology/oncology patients. The post‐ARK immunoassay group had an increase in clearance time of 33 h/cycle and 31% increase in cycles with delayed clearance. On posthoc analysis, use of an adjusted clearance threshold of <0.15 µmol/L post‐ARK immunoassay, as opposed to the traditional <0.1 µmol/L threshold, would have similar incidence of delayed clearance. The ARK immunoassay demonstrated a positive bias compared to the FPIA in clinical practice, which led to an institutional policy change.
Effect of freeze‐dried durian skin nanofiber on the physical properties of poly(lactic acid) biocomposites
Authors: Mohd Nordin Nurfarahin , Anuar Hazleen , Buys Yose Fachmi , Ali Fathilah , Thomas Sabu , Mohd Nasir Nur Aimi 
Published: November 2020

AbstractDurian skin wastes generated by durian fruit or Durio zibethinus Murray shows potential as a new natural fiber‐based reinforcement for polymers. Freeze drying (FD) method is reported able to reduce the size of particles. Thus, in this research, durian skin nanofiber (DSNF) is developed using a FD process from durian skin fiber (DSF) and its effect on poly(lactic acid) (PLA) biocomposite is investigated. Cinnamon essential oil was added as a plasticizer for PLA biocomposite. Morphological analysis via transmission electron microscopy and scanning electron microscopy showed that FD method reduced the DSF particle size into DSNF. Dynamic light scattering was also performed to see the size distribution of DSNF particle after the freeze dried process. The hydrophobicity of the biocomposite was measured by contact angle and UV transmittance was done to analyze its transparency and UV penetration. The tensile strength of these composites showed significant changes in the presence of DSF and DSNF in PLA.
Social support as a source of vitality among college students: The moderating role of social self‐efficacy
Authors: Carmeli Abraham , Peng Ann C. , Schaubroeck John M. , Amir Inbar 
Published: November 2020

AbstractWhereas social support contributes to individual vitality and academic performance, the theoretical process through which social support promotes performance, and for whom it is most beneficial in this respect, remain open questions. We developed a conceptual model in which social support influences academic performance by promoting vitality, particularly among individuals who are low on social self‐efficacy (SSE). Social support has a positive effect on university students' academic performance, which is largely explained by its relationship with reported vitality among students with relatively low levels of SSE but not among students with higher SSE. We discuss the theoretical and practical implications for the existing literature on social support and vitality in academic settings.
Investigation of Hydroxyl‐Terminated Polyether Cured with Different Isocyanates: Curing Process and Mechanical Property
Authors: Zheng Qilong , Wang Guoqiang , Du Jiaojiao , Li Jizhen , Li Junqiang , Tang Qiufan , Fan Xuezhong 
Published: November 2020

AbstractIn order to study the curing process of hydroxyl‐terminated polyether (HTPE) with different curing agents, aliphatic triisocyanate (N100) and toluene diisocyanate (TDI), the crosslink density (XLD) and chemical processes of the curing reactions have been investigated by low‐field NMR spectroscopy and FTIR spectroscopy, respectively, while the mechanical properties of those two cure systems were studied as well. The results show that, for either HTPE/N100 or HTPE/TDI, the higher curing temperature leads to the shorter curing time to reach stability of XLD, while the final XLD decreases by increasing the temperature. The XLD and tensile strength of HTPE/TDI are both lower than those of HTPE/N100, although curing reaction of the HTPE/TDI system is faster and more complete, as seen from FTIR spectra. Besides, the tensile strength of HTPE/N100 based propellant attains the maximum value of 0.64 MPa at NCO/OH ratio of 1.4, while the maximum XLD value of 6.5
10−5 mol⋅cm−3 was obtained at the same time. The XLD is well correlated in tensile strength with the variation of NCO/OH, that suggests regulation of XLD value may be an effective way to optimize the curing conditions for improving mechanical properties of HTPE/isocyanate‐based propellants.
Descriptor observer‐based sensor and actuator fault tolerant tracking control design for linear parameter varying systems
Authors: Rabaoui Bouali , Hamdi Habib , BenHadj Braiek Naceur , Rodrigues Mickael 
Published: November 2020

AbstractThis article investigates the design of a descriptor observer (DO)‐based sensor and actuator fault (SAF) tolerant tracking control for linear parameter varying (LPV) systems with LPV outputs and disturbed by unknown inputs. The fault tolerant tracking control closed loop system is made of: a DO, a proportional integral derivative (PID) AF tolerant tracking controller, and a sensor fault compensation block. The proposed approach gives a solution to the tracking control problem for this class of systems where the observer and the controller gain matrices can be obtained by solving an optimization problem. The main advantages of this approach with regard to previous approaches are getting around a critical situation which is that the studied LPV system is subject to SAFs simultaneously and unknown inputs, with less conservative results and improving trajectory tracking performances especially in terms of accuracy and rapidity. The performances of the proposed approach are compared to a previous study through a numerical example which is carried out on an hydraulic system.
Designing New Metal Chalcogenide Nanoclusters through Atom‐by‐Atom Substitution
Authors: Gholipour‐Ranjbar Habib , Fang Hong , Guan Jintong , Peters D'Angelo , Seifert Audra , Jena Puru , Laskin Julia 
Published: November 2020

AbstractAtom‐by‐atom substitution is a promising strategy for designing new cluster‐based materials, which has been used to generate new gold‐ and silver‐containing clusters. Here, the first study focused on atom‐by‐atom substitution of Fe and Ni to the core of a well‐defined cobalt sulfide superatom [Co6S8L6]+ ligated with triethylphosphine (L = PEt3) to produce [Co5MS8L6]+ (M = Fe, Ni) is reported. Electrospray ionization mass spectrometry confirms the substitution of 1–6 Fe atoms with the single Fe‐substituted cluster being the dominant species. The Fe‐substituted clusters oxidize in solution to generate dicationic species. In contrast, only a single Ni‐substituted cluster is observed, which remains stable as a singly charged species. Collision‐induced dissociation experiments indicate the reduced stability of the [Co5FeS8L6]+ toward ligand loss in comparison with the unsubstituted and Ni‐substituted counterparts. Density functional theory calculations provide insights into the effect of metal atom substitution on the stability and electronic structures of the clusters. The results indicate that Fe and Ni have a different impact on the electronic structure, optical, and magnetic properties, as well as ligand‐core interaction of [Co6S8L6]. This study extends the atom‐by‐atom substitution strategy to the metal chalcogenide superatoms providing a direct path toward designing novel atomically precise core‐tailored superatoms.
New Challenges and Changing Opportunities: The Differing Responses of Transnational Solidarity Organisations in Germany
Authors: Zschache Ulrike 
Published: November 2020

AbstractIn her study of the German case, Zschache shows that the activism and discourse of local transnational solidarity organisations (TSOs) in Germany display a considerable amount of similarities. In particular, the author argues that solidarity work has become more political, insisting more strongly on an advocatory, rights-based approach. She also draws attention to the importance of collaboration as a means to enhance the effectivity of solidarity work and to promote mutual empowerment as a crucial principle of solidarity. Moreover, the author offers new insights into how TSOs react to changing circumstances, engage in joint learning and promote innovations. In this context, the discourse of solidarity that seeks to transcend specific target groups and commits to a more integrated, cross-sectoral approach is particularly salient.
Scopes of Solidarity in Times of Crisis: Insights from Poland
Authors: Petelczyc Janina , Bakalarczyk Rafał , Szarfenberg Ryszard 
Published: November 2020

AbstractPoland coped well with the worldwide economic crisis and refugee challenge. However, studies show that the crisis did in fact exist, and the state’s poor response to it was reflected in the citizens who bore its brunt. As for migration, polarised public discourse and the attitude of the government resulted in social tension, including extreme right-wing parties mobilising citizens around migration issues. In this chapter, using qualitative data from the TransSOL project, the authors answer the following question: How have crises and other changing circumstances affected organised solidarity in different social fields, namely unemployment, migration and disability? The chapter argues that, according to the theory of the economic recession’s impact on multidimensional solidarity due to the austerity measures, or the Polish government’s inaction, social solidarity did emerge, but in unforeseen ways and fields.
Against the Tide: Transnational Solidarity in Brexit Britain
Authors: Baglioni Simone , Biosca Olga , Montgomery Tom 
Published: November 2020

AbstractThis chapter discusses UK-based civil society organisations supporting vulnerable groups (migrants, refugees and asylum seekers; disabled people; and the unemployed) which have been on the front line of a decade of austerity and funding cuts. It does so by exploring the relationship between these organisations and policymakers; the impact of austerity on the organisations themselves; the mission and activities of these organisations and the cooperation between organisations at different scales (transnational, national and local). Our findings reveal a tale of ‘two Britains’: one of top-down policies and discourses which are anti-solidarity and re-activate decades-old discourses of dependency and deservingness; and another Britain of grassroots solidarity, (self-)organised from the bottom up, often in partnership with austerity-hit local government.
Black holes, moduli, and long-range forces
Authors: Heidenreich Ben 
Published: November 2020

Abstract
It is well known that an identical pair of extremal Reissner-Nordström black holes placed a large distance apart will exert no force on each other. In this paper, I establish that the same result holds in a very large class of two-derivative effective theories containing an arbitrary number of gauge fields and moduli, where the appropriate analog of an extremal Reissner-Nordström black hole is a charged, spherically symmetric black hole with vanishing surface gravity or vanishing horizon area. Analogous results hold for black branes.
From Jean Leray to the millennium problem: the Navier–Stokes equations
Authors: Farwig Reinhard 
Published: November 2020

AbstractOne of the Millennium problems of Clay Mathematics Institute from 2000 concerns the regularity of solutions to the instationary Navier–Stokes equations in three dimensions. For an official problem description, we refer to an article by Charles Fefferman (Existence and smoothness of the Navier–Stokes equation.http://www.claymath.org/sites/default/files/navierstokes.pdf) on the whole space problem as well as the periodic setting in$$\mathbb {R}^3$$R3. In this article, we will introduce the Navier–Stokes equations, describe their main mathematical problems, discuss several of the most important results, starting from 1934 with the seminal work by Jean Leray, and proceeding to very recent results on non-uniqueness and examples involving singularities. On thistour de forcewe will explain the open problem of regularity.