bluuebunny/crossref_metadata_2025_split huggingface dataset:
Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery
Authors: Mahmoudi Sajjad , Jafari Arezou , Javadian Soheila 
Published: September 2019

Abstract
Recently, nanoparticles have been used along with surfactants for enhancing oil recovery. Although the recent studies show that oil recovery is enhanced using nanoparticle/surfactant solutions, some effective parameters and mechanisms involved in the oil recovery have not yet been investigated. Therefore, the temperature effect on the stability of nanoparticle/surfactant solutions and ultimate oil recovery has been studied in this work, and the optimal concentrations of both SiO2 nanoparticle and surfactant (sodium dodecyl sulfate) have been determined by the Central Composite Design method. In addition, the simultaneous effects of parameters and their interactions have been investigated. Study of the stability of the injected solutions indicates that the nanoparticle concentration is the most important factor affecting the solution stability. The surfactant makes the solution more stable if used in appropriate concentrations below the CMC. According to the micromodel flooding results, the most effective factor for enhancing oil recovery is temperature compared to the nanoparticle and surfactant concentrations. Therefore, in floodings with higher porous medium temperature, the oil viscosity reduction is considerable, and more oil is recovered. In addition, the surfactant concentration plays a more effective role in reservoirs with higher temperatures. In other words, at a surfactant concentration of 250 ppm, the ultimate oil recovery is improved about 20% with a temperature increase of 20 °C. However, when the surfactant concentration is equal to 750 ppm, the temperature increase enhances the ultimate oil recovery by only about 7%. Finally, the nanoparticle and surfactant optimum concentrations determined by Design-Expert software were equal to 46 and 159 ppm, respectively. It is worthy to note that obtained results are validated by the confirmation test.
Plate-to-Layer Bi2MoO6/MXene-Heterostructured Anode for Lithium-Ion Batteries
Authors: Zhang Peng , Wang Danjun , Zhu Qizhen , Sun Ning , Fu Feng , Xu Bin 
Published: September 2019

Abstract
Bi2MoO6 is a potentially promising anode material for lithium-ion batteries (LIBs) on account of its high theoretical capacity coupled with low desertion potential. Due to low conductivity and large volume expansion/contraction during charge/discharge cycling of Bi2MoO6, effective modification is indispensable to address these issues. In this study, a plate-to-layer Bi2MoO6/Ti3C2Tx (MXene) heterostructure is proposed by electrostatic assembling positive-charged Bi2MoO6 nanoplates on negative-charged MXene nanosheets. MXene nanosheets in the heterostructure act as a highly conductive substrate to load and anchor the Bi2MoO6 nanoplates, so as to improve electronic conductivity and structural stability. When the mass ratio of MXene is optimized to 30%, the Bi2MoO6/MXene heterostructure exhibits high specific capacities of 692 mAh g−1 at 100 mA g−1 after 200 cycles and 545.1 mAh g−1 with 99.6% coulombic efficiency at 1 A g−1 after 1000 cycles. The results provide not only a high-performance lithium storage material, but also an effective strategy that could address the intrinsic issues of various transition metal oxides by anchoring them on MXene nanosheets to form heterostructures and use as anode materials for LIBs.
Dietary patterns are associated with depressive symptoms in older Australian women but not men
Authors: Hart Michael J. , Milte Catherine M. , Torres Susan J. , Thorpe Maree G. , McNaughton Sarah A. 
Published: September 2019

AbstractStudies have examined the association between depressive symptoms and dietary patterns; however, only few studies focused on older adults. The present study examines the association between current and past dietary patterns and depression in a community-dwelling adult population aged 55 years and over. Adults (n 4082) were recruited into the Wellbeing, Eating and Exercise for a Long Life study in Victoria, Australia. In 2010 and 2014, data were collected using self-administered questionnaires including a 111-item FFQ, the RAND thirty-six-item Short Form Health Survey of health-related quality of life and the International Physical Activity Questionnaire. Depressive symptoms were assessed using the Geriatric Depression Scale in 2014. Current (2014) and past (2010) dietary patterns were determined using principal component analysis. Association between dietary patterns and depressive symptoms was assessed using a mixed model analysis with adjustment for covariates. Two similar dietary patterns were identified in men and women (n 2142). In women, a healthy dietary pattern (characterised by frequent intake of vegetables, fruits and fish) was associated with lower levels of depressive symptoms (current diet: β = −0·260, 95 % CI −0·451, −0·070; past diet: β = −0·201, 95 % CI −0·390, −0·013). A current unhealthy dietary pattern in women (characterised by frequent intake of red and processed meat, potatoes, hot chips, cakes, deserts and ice cream) was associated with higher levels of depressive symptoms (β = 1·367, 95 % CI 0·679, 2·056). No associations were identified in men. Further research is needed to confirm these findings and to understand the differences that may occur by sex.
The Symmetry of Hypocrisy in Czech-German Legal Conciliation, 1989–1997
Authors: Bracey Sarah 
Published: September 2019

AbstractFollowing the collapse of communism in 1989, the Czechoslovak and German governments entered a new phase of relations marked by reconciliatory goodwill. However, relations rapidly deteriorated in the face of mutual claims for material redress concerning the wartime Nazi occupation of Czechoslovakia and the expulsion/transfer of the Sudeten German population in the immediate postwar period. The Czechoslovak (later Czech) and German governments disputed the legal status of the Munich Agreement of 1938 and the Beneš Decrees of 1945, and their differing interpretations had implications either strengthening or undermining the Sudeten German restitution claim. Comparing argumentative strategies reveals a striking symmetry of hypocrisy. Czech and German representatives selectively employed two opposing theories of legal legitimacy, reflecting the jurisprudential schools of legal positivism and natural law theory, either to defend or repudiate the abovementioned instruments. This article argues that reciprocal inconsistency critically undermined attempts by Czech and German representatives to achieve a legal resolution in the 1990s.
Neural circuits and nicotinic acetylcholine receptors mediate the cholinergic regulation of midbrain dopaminergic neurons and nicotine dependence
Authors: Xiao Cheng , Zhou Chun-yi , Jiang Jin-hong , Yin Cui 
Published: September 2019

AbstractMidbrain dopaminergic (DA) neurons are governed by an endogenous cholinergic system, originated in the mesopontine nuclei. Nicotine hijacks nicotinic acetylcholine receptors (nAChRs) and interferes with physiological function of the cholinergic system. In this review, we describe the anatomical organization of the cholinergic system and the key nAChR subtypes mediating cholinergic regulation of DA transmission and nicotine reward and dependence, in an effort to identify potential targets for smoking intervention. Cholinergic modulation of midbrain DA systems relies on topographic organization of mesopontine cholinergic projections, and activation of nAChRs in midbrain DA neurons. Previous studies have revealed that α4, α6, and β2 subunit-containing nAChRs expressed in midbrain DA neurons and their terminals in the striatum regulate firings of midbrain DA neurons and activity-dependent dopamine release in the striatum. These nAChRs undergo modification upon chronic nicotine exposure. Clinical investigation has demonstrated that partial agonists of these receptors elevate the success rate of smoking cessation relative to placebo. However, further investigations are required to refine the drug targets to mitigate unpleasant side-effects.
Integrated network analysis identifies hsa-miR-4756-3p as a regulator of FOXM1 in Triple Negative Breast Cancer
Authors: Gu Yuanliang , Wang Wenjuan , Wang Xuyao , Xie Hongyi , Ye Xiaojuan , Shu Peng 
Published: September 2019

AbstractBoth aberrantly expressed mRNAs and micro(mi)RNAs play important roles in cancer cell function, which makes integration analysis difficult. In this study, we first applied master regulator analysisalgorithm and confirmed hsa-miR-4756-3p as a candidate miRNA in triple negative breast cancer (TNBC) patients; hsa-miR-4756-3p could regulate TNBC cell line apoptosis, proliferation, migration, and cell cycle as well as suppress TGF-β1 signalling andtumour growth. In TNBC, forkhead box protein M1 (FOXM1)was found to be an hsa-miR-4756-3p target gene, and FOXM1 knockout completely inhibited hsa-miR-4756-3p-induced cell migration and metastasis, TGF-β1 signalling, and epithelial mesenchymal signal activation, which indicated that hsa-miR-4756-3p functions via the FOXM1-TGFβ1-EMT axis.
Consensus model of a cyanobacterial light-dependent protochlorophyllide oxidoreductase in its pigment-free apo-form and photoactive ternary complex
Authors: Schneidewind Judith , Krause Frank , Bocola Marco , Stadler Andreas Maximilian , Davari Mehdi D. , Schwaneberg Ulrich , Jaeger Karl-Erich , Krauss Ulrich 
Published: September 2019

AbstractPhotosynthetic organisms employ two different enzymes for the reduction of the C17 = C18 double bond of protochlorophyllide (Pchlide), yielding the chlorophyll precursor chlorophyllide. First, a nitrogenase-like, light-independent (dark-operative) Pchlide oxidoreductase and secondly, a light-dependent Pchlide oxidoreductase (LPOR). For the latter enzyme, despite decades of research, no structural information is available. Here, we use protein structure modelling, molecular dynamics (MD) simulations combined with multi-wavelength analytical ultracentrifugation (MWA-AUC) and small angle X-ray scattering (SAXS) experiments to derive a consensus model of the LPOR apoprotein and the substrate/cofactor/LPOR ternary complex. MWA-AUC and SAXS experiments independently demonstrate that the apoprotein is monomeric, while ternary complex formation induces dimerization. SAXS-guided modelling studies provide a full-length model of the apoprotein and suggest a tentative mode of dimerization for the LPOR ternary complex, supported by published cross-link constraints. Our study provides a first impression of the LPOR structural organization.
Spin-driven electrical power generation at room temperature
Authors: Katcko K. , Urbain E. , Taudul B. , Schleicher F. , Arabski J. , Beaurepaire E. , Vileno B. , Spor D. , Weber W. , Lacour D. , Boukari S. , Hehn M. , Alouani M. , Fransson J. , Bowen M. 
Published: September 2019

AbstractOn-going research is exploring novel energy concepts ranging from classical to quantum thermodynamics. Ferromagnets carry substantial built-in energy due to ordered electron spins. Here, we propose to generate electrical power at room temperature by utilizing this magnetic energy to harvest thermal fluctuations on paramagnetic centers using spintronics. Our spin engine rectifies current fluctuations across the paramagnetic centers’ spin states by utilizing so-called ‘spinterfaces’ with high spin polarization. Analytical and ab-initio theories suggest that experimental data at room temperature from a single MgO magnetic tunnel junction (MTJ) be linked to this spin engine. Device downscaling, other spintronic solutions to select a transport spin channel, and dual oxide/organic materials tracks to introduce paramagnetic centers into the tunnel barrier, widen opportunities for routine device reproduction. At present MgO MTJ densities in next-generation memories, this spin engine could lead to ‘always-on’ areal power densities that are highly competitive relative to other energy harvesting strategies.
Polaritätsanalyse in der homöopathischen Akutbehandlung
Authors: Schipflinger Guntmar 
Published: September 2019

ZusammenfassungDie Polaritätsanalyse von H. Frei als Weiterentwicklung der Arbeitsweise Bönninghausens und dessen Therapeutischen Taschenbuchs erlaubt eine effiziente und sichere Akutverschreibung. Eine kurze Einleitung in die Arbeitsweise wird mit 3 Akutfällen aus der Praxis illustriert.
Non-destructive imaging for quality assurance of magnetoresistive random-access memory junctions
Authors: Jackson E , Wu Y , Frost W , Kim J-Y , Samiepour M , Elphick K , Sun M , Kubota T , Takanashi K , Ichinose T , Mizukami S , Hirohata A 
Published: September 2019

Abstract
We have developed a new non-destructive sub-surface interfacial imaging technique. By controlling the penetration depth of the incident electrons, through control of the electron beam acceleration voltage in a scanning electron microscope, we can observe sub-surface interfaces. The voltages for imaging are selected based on Monte Carlo electron flight simulations, where the two voltages have  >5% difference between the number of backscattered electrons generated in the layers above and below the buried interface under investigation. Due to the non-destructive nature, this imaging method can be used alongside an applied electrical current and voltage, allowing concurrent observations of the interfacial structures and transport properties, e.g. effective and active junction area, to occur. Magnetic tunnel junctions used in magnetic random access memory have been imaged and the data has been fed back to improve their fabrication processes. Our imaging method is therefore highly useful as both a quality assurance and development tool for magnetic memory and nanoelectronic devices.
Students making sense of motion in a vertical roller coaster loop
Authors: Pendrill Ann-Marie , Eriksson Moa , Eriksson Urban , Svensson Kim , Ouattara Lassana 
Published: September 2019

Abstract
Describing the motion in a vertical roller coaster loop requires a good understanding of Newton’s laws, vectors and energy transformation. This paper describes how first-year students try to make sense of force and acceleration in this example of non-uniform circular motion, which was part of a written exam. In addition to an analysis of the exam solutions by about 60 students, a group interview was performed a couple of weeks later with four students, who had all passed the exam. The interview allowed the students to reflect on assumptions made and information missed.
ICRF coupling in ASDEX upgrade magnetically perturbed 3D plasmas
Authors: López G Suárez , Ochoukov R , Tierens W , Willensdorfer M , Zohm H , Aguiam D , Birkenmeier G , Bobkov V , Cavedon M , Dunne M , Faugel H , Fischer R , Fünfgelder H , Guimarãis L , McDermott R , Noterdaeme J-M , Seliunin E , Suttrop W 
Published: September 2019

Abstract
The RF properties of the four ion cyclotron range of frequencies (ICRF) antennas in the ASDEX Upgrade tokamak are characterized in H-mode magnetically perturbed 3D discharges. An n = 2 magnetic perturbation (MP) field is applied and rigidly rotated, which allows diagnosing the separatrix displacement and consequent coupling change. We find the antenna loading resistance to be coherently modified by the resulting non-axisymmetric plasma equilibria, thus becoming a function of the applied MP field poloidal mode spectra. We perform a detailed statistical analysis, which correlates the change in loading resistance to the fast wave R-cutoff layer movements. From it, a 1D scaling is derived that differs from previous studies evaluated in pure axisymmetric plasma conditions. This experimentally derived scaling is used to predict the average loading resistance change of the ITER ICRF antenna under applied MPs. ICRF coupling simulations using measured 1D density profiles are performed with the RAPLICASOL code, in order to investigate the predictive capabilities of numerical state of the art tools. We find that both 1D conventional scaling laws and 1D numerical simulations fail to capture the 3D physics, and can substantially overestimate the measured loading resistance change up to a factor of ∼3.
Some remarks about the time-dependent Schrödinger equation with damping
Authors: Wieser R , Yang C H 
Published: September 2019

Abstract
The missing derivation of the time-dependent Schrödinger equation following Schrödinger’s original description of the time-independent Schrödinger equation. Also, this description is extended to derive the Caldirola-Kanai, the Schuch-Schrödinger, and the Gisin-Schrödinger equation. In the second part, the Gisin-Schrödinger equation will be derived once more using the Ito formalism of stochastic differential equations. Furthermore, we discuss the extension to larger spin-system using the cluster mean-field theory.
High pressure thermal hydrogen compression employing Ti1.1CrMn metal hydride material
Authors: Corgnale Claudio , Sulic Martin 
Published: September 2019

Abstract
The use of Ti1.1CrMn metal hydride material in a thermal hydrogen compression system is investigated. The thermodynamic properties of the material, initially synthesized and annealed at 900 °C for 48 h (for quantities on the order of 10 kg), are assessed performing pressure–concentration–temperature equilibrium tests for hydrogen absorption and desorption at pressure up to about 900 bar. Results show flat plateaus and reduced hysteresis. The calculated absorption enthalpy and entropy are 20.55 ± 0.13 kJ

mol

H
2

−
1

and 102.16 ± 3.00 J

mol

H
2

−
1

K−1 respectively. The desorption enthalpy and entropy are 22.89 ± 0.45 kJ

mol

H
2

−
1

and 107.80 ± 10.45 J

mol

H
2

−
1

K−1, respectively. The metal hydride achieves a weight capacity of approximately 1.8% at room temperature and maintain an approximately constant weight capacity during the cycling testing. This makes the material a suitable candidate for high pressure hydrogen compressors, achieving pressures on the order of 450 bar at temperatures of approximately 140 °C. The same material composition is synthesized at laboratory scale quantities (on the order of 50 g), applying a modified annealing procedure (1200 °C for 240 h). This allows higher operating pressures to be achieved, but the modified annealing process also produces (at least) an additional phase, namely the C15 Laves phase, present in the material along with the C14 Laves phase. Consequently, two pressure plateaus are present at each operating temperature, reducing the effective material weight capacity available for the compression application. A two-stage hybrid compressor concept is also presented, with the thermal hydride compressor paired with a lower pressure electrochemical unit. In principle, the system can compress hydrogen with a compression ratio of 45 from 10 to 450 bar without any external thermal input and recovering the electrochemical unit waste heat to drive the thermal stage.
Formulas and Web Application for Designing a Biospecimen Pooling Study to Compare Group Means
Authors: Van Domelen Dane R. , Lyles Robert H. 
Published: September 2019

Background:
When research focuses on biomarker assessment in settings where per-assay costs are high relative to per-subject costs, a biospecimen pooling study design can be extremely cost-effective. However, designing a study to maximize cost savings is complicated by the fact that pooled measurements are typically subject to processing error, inducing additional variability caused by combining biospecimens, and may also be affected by assay-related measurement error.

Methods:
We provide formulas and an interactive web application (hereafter called app) for designing a pooling study to compare group means. Power and sample size formulas are justified by Central Limit Theorem arguments that make no distributional assumptions on the biomarker. Errors can be assumed mean-0 additive or mean-1 multiplicative, the latter being well-suited for skewed biomarkers.

Results:
User inputs for the app include usual power parameters as well as per-assay and per-subject costs and information about the errors: which are present, whether they are additive or multiplicative, and their variances. The app generates plots revealing the optimal pool size, required number of assays, cost savings, and sensitivity to the hard-to-predict processing error variance.

Conclusions:
These tools should aid in the design and deployment of pooling studies powered to detect group mean differences while minimizing total study costs.
The one-minute preceptor model for nurse practitioners: A pilot study of a preceptor training program
Authors: Miura Miki , Daub Katharyn , Hensley Patricia 
Published: September 2019

ABSTRACT
Preceptors play a vital role in nurse practitioners' (NPs) clinical education. Based on Bandura's self-efficacy theory, improvement of NPs' self-efficacy is likely to lead to positive changes in behavior. Thus, it can enhance their willingness to precept and increase readiness for a preceptor role. The aims of this pilot study were to develop an NP preceptor training program and to evaluate the program following implementation. The one-minute preceptor (OMP) model has been used among other health care disciplines and can promote effective and efficient communication. In the first phase of this pilot study, an NP preceptor training program to teach NPs about the OMP model was created. For the second phase of this project, a pilot test of the program was implemented and evaluated. Nine clinical NPs participated in the study. Surveys were administered at three different points to determine whether the participants' self-efficacy as a preceptor and willingness to become a preceptor improved after participation. Results demonstrated that NP preceptor training improved multiple aspects of participants' self-efficacy as NP preceptors and positively affected their decision to participate in preceptorship.
Influence of diabetes mellitus on energy metabolism in patients with alcoholic liver cirrhosis
Authors: Zhao Juan , Wang Zhong-Ying , Li Juan , Yu Hong-Wei , Meng Qing-Hua 
Published: September 2019

Objective:
The objective was to explore the characteristics of energy metabolism in patients with alcoholic liver cirrhosis (ALC) and diabetes mellitus (DM).

Methods:
Thirty-four male patients with ALC and DM, 30 male patients with ALC without DM and 10 male healthy controls (HC) were enrolled in this study. Resting energy expenditure (REE), respiratory quotient (RQ) were measured by indirect calorimetry. Data were analyzed using the Student’s t-test, Mann–Whitney U-test and χ2 tests between two groups. Logistic regression analysis was used to analyze the risk factors for hypermetabolism.

Results:
Measured REE was significantly higher in patients with ALC and DM (1740 ± 338 kcal/d) than in patients with ALC (1400 ± 304 kcal/d, P < 0.01). Fasting blood glucose was an independent factor predicting hypermetabolism in all of the patients with ALC (P = 0.005). RQ was lower in patients with ALC and DM (0.80 ± 0.06) than in patients with ALC (0.83 ± 0.05, P = 0.027) and the HC (0.86 ± 0.03, P = 0.001). In the ALC and DM group, measured REE as percentage of predicted REE by Harris–Benedict formula was higher in patients with HbA1c ≥ 7.5% than in those with HbA1c < 7.5% (126.36 ± 15.19% vs. 109.48 ± 23.89%, P = 0.040).

Conclusion:
REE was increased and RQ was significantly decreased in patients with ALC and DM. These changes were associated with poor glucose control. HbA1c less than 7.5% may reduce the risk of hypermetabolism.