Miracle-dz/UniFAR-FTUs huggingface dataset:
Tidal interactions in spin–orbit misaligned systems

Spin-orbit misalignments have been detected in exoplanetary systems and binary star systems. Tidal interactions may have played an important role in the evolution of the spin-orbit angle. In this study, we investigate the tidal interactions in spin-orbit misaligned systems. In particular, we focus on the tidal response of a rotating fluid body to the obliquity tide, which may be important for the evolution of the spin-orbit angle but hardly affects the orbital evolution. The obliquity tide also provides a torque for the mutual precession of the spin and orbital axes around the total angular momentum vector, which has not yet been considered in previous studies on the tidal interactions. In this paper, we first formulate a set of linearized equations describing the tidal response in spin-orbit misaligned systems, taking into account the precessional motion. Numerical solutions in a homogeneous fluid and in a polytrope of index 1 show that dissipative inertial waves can be excited on top of precession by the obliquity tide in the presence of a rigid core. The tidal quality factor associated with the obliquity tide $Q'_{210}$ can be several orders of magnitude smaller than those associated with other tidal components if their frequencies fall outside the frequency range of inertial waves. Therefore, it is possible that the spin-orbit misalignment undergoes much more rapid decay than the orbital decay in hot Jupiter systems owing to the enhanced dissipation of the obliquity tide.
A Circuit Design Method for Constant Voltage Output With Zero Phase Angle and Minimum Coupler Voltages in Capacitive Power Transfer

Constant output characteristics, zero phase angle (ZPA), and coupler voltage stresses as low as possible are practical requirements for high power and large air-gap capacitive power transfer (CPT) applications. This article derives conditions of load-independent constant voltage output, ZPA, and minimum coupler voltages for general CPT systems, respectively. Minimum degrees of freedom (DOF) for the above performance are analyzed. Given performance requirements, a systematic circuit design method based on DOF analysis is proposed to design compensation circuits with fewer components to simplify complexity and decrease costs. The proposed method can predict feasible topologies, and application considerations are provided to guide topology selection. A 3LC-compensated CPT system is proposed to realize the constant voltage output with ZPA, minimum coupler voltages, and efficiency optimization. A 2.2 kW CPT prototype has been prepared with a 250 mm air-gap distance and dc–dc efficiency is 87.2%. Rms values of coupler voltages are about 5 kV at the rated power.
Effect of Mulberry Leaf Powder of Varying Levels on Growth Performance, Immuno-Antioxidant Status, Meat Quality and Intestinal Health in Finishing Pigs

Background: The purpose of the research was to investigate the effect of mulberry leaf powder (MP) of varying levels on growth performance, immuno-antioxidant status, meat quality and intestinal health. A total of 120 healthy finishing pigs (Duroc × [Landrace × Yorkshire], 72.2 ± 4.8 kg) were selected for this experiment and divided into four treatments, according to randomized complete block design, with three replicates of 10 pigs each (barrow:gilt = 1:1). The dietary treatments were as follows: (1) Ctrl, corn-soybean meal basal diet; (2) MP_6: basal diet with 6% MP. (3) MP_9: basal diet with 9% MP; (4) MP_12, basal diet with 12% MP. The whole experiment lasted for 33 days. Results: Compared to the Ctrl, dietary supplementation of 9% MP had no negative effects on growth performance, antioxidative capacity, intestinal digestive enzyme activities and inflammatory factors, carcass trait, the lipid profile and amino acid of muscle or related mRNA expression. MP_6 and MP_12 showed detrimental effects on average daily gain (p < 0.05) and digestibility (p < 0.05) of dry matter, crude protein and gross energy. Furthermore, MP_9 could improve (p < 0.05) the level of serum immunoglobulin M, enhance (p < 0.05) the a*24h of meat, up-regulate (p < 0.05) the mRNA expression of occludin and Mucin-2, increase (p < 0.05) the relative abundance of Bifidobacterium and decrease (p < 0.05) the relative abundance of Campylobacter in the hindgut. Conclusion: Summarizing our study, dietary supplementation of 9% MP had no negative effects on growth performance, antioxidative capacity, intestinal digestive enzyme activities and inflammatory factors, carcass trait, the lipid profile and amino acid of muscle, or related mRNA expression. Furthermore, MP_9 could improve serum immunity, enhance meat quality, up-regulate the mRNA expression related to the mechanical and chemical barriers and enrich the beneficial microbiota of the hindgut. Hence, dietary supplementation of 9% MP in finishing pigs may be advisable.
Improved quantum annealer performance from oscillating transverse fields

Quantum annealing is a promising application of quantum hardware for solving hard classical optimization problems. The runtime of the quantum annealing algorithm, in absence of noise or other effects such as the constructive interference of multiple diabatic crossings, and at constant adiabatic evolution rate, is proportional to the inverse minimum gap squared. In this article, we show that for a large class of problem Hamiltonians, one can improve in the runtime of a quantum annealer (relative to minimum gap squared scaling) by adding local oscillating fields, which are not amenable to efficient classical simulation. For many hard $N$-qubit problems these fields can act to reduce the difficulty exponent of the problem, providing a polynomial runtime improvement. We argue that the resulting speedup should be robust against local qubit energy fluctuations, in contrast to variable-rate annealing, which is not. We consider two classes of hard first order transition (the Grover problem and $N$-spin transitions between polarized semiclassical states), and provide analytical arguments and numerical evidence to support our claims. The oscillating fields themselves can be added through current flux-qubit based hardware by simply incorporating oscillating electric and magnetic lines, and could thus be implemented immediately.
A Novel Single/Multiple Output Multilevel Buck Rectifier for EV-Battery Charging

An electric vehicle (EV) charging system is usually implemented in two stages: a power factor correction (PFC) rectifier stage, followed by a DC-DC converter. For such power conversion, multilevel rectifiers (MLRs) offer advantages compared to a two-level rectifier, such as reducing voltage ratings of power switches and yielding high-quality input voltage waveform. In MLRs, one of the most challenging aspects is balancing the capacitors’ voltages. This article proposes a self-balancing five-level PFC rectifier with the possibility of single/multiple outputs. The proposed rectifier performs buck operation and offers a wide output voltage regulation, which is suitable for EV battery charging. The five-level operation of proposed buck rectifier with continuous conduction mode (CCM) leads to elimination of the inductive filter on the DC side and the capacitive filter on the AC side. This article presents the operating principle, modulation strategy, closed-loop control and experimental validation of the proposed topology.
New negative‐grounded capacitance multiplier circuits

In this communication, three new negative‐grounded capacitance multiplier (NGCM) circuits employing a single current feedback operational amplifier (CFOA), two resistors, and a grounded capacitor (which is most suitable for parasitic absorption and also IC implementation point of view) are investigated. No matching constraints are required for any of the proposed circuit realizations. Out of the three proposed circuits, multiplication factor of one of the capacitance multiplier can be controlled electronically as the controlling resistor is grounded, which can easily be replaced by a voltage‐controlled resistor (VCR). Error analysis of the proposed NGCMs has been carried out, and the results have been compared with those obtained from ideal analysis. To substantiate the feasibility of the proposed circuits, macro model of CFOA has been used, and the simulations have been performed in Personal Simulation Program with Integrated Circuit Emphasis (PSPICE). Simulation results for frequency analysis, Monte‐Carlo analysis, and temperature analysis have been included for the theoretical justification. Noise analysis and power supply rejection ratio analysis have also been carried out for the proposed circuits. The multiplication factors of the proposed NGCMs have been obtained up to a maximum value of 2001. The impedance and phase of the proposed NGCM structures are insensitive with temperature. The functionality of the proposed structures has also been validated experimentally using commercially available IC AD844‐type CFOA.
A novel measurement of $B^0_s$ and $D^-_s$ lifetimes using semileptonic decays at LHCb : arXiv

I report new, world-leading LHCb results on heavy meson lifetimes. We use a novel approach that suppresses the shortcomings typically associated with reconstruction of semileptonic decays, allowing for precise measurements of lifetimes and other properties in collider experiments. We achieve a 15% and a $2\times$ improvement over current best determinations of the flavor-specific $B^0_s$ lifetime and $D^-_s$ lifetime, respectively.
Comparison of model and ground observations finds snowpack and blowing snow both contribute to Arctic tropospheric reactive bromine

Abstract. Reactive halogens play a prominent role in the atmospheric chemistry of the Arctic during springtime. Field measurements and models studies suggest that halogens are emitted to the atmosphere from snowpack and reactions on wind-blown snow. The relative importance of snowpack and blowing snow sources is still debated, both at local scales and regionally throughout the Arctic. To understand implications of these halogen sources on a pan-Arctic scale, we simulate Arctic reactive bromine chemistry in the atmospheric chemical transport model GEOS-Chem. Two mechanisms are included: 1) a blowing snow sea salt aerosol formation mechanism and 2) a snowpack mechanism assuming uniform molecular bromine production from all snow surfaces. We compare simulations including neither mechanism, each mechanism individually, and both mechanisms to examine conditions where one process may dominate or the mechanisms may interact. We compare the models using these mechanisms to observations of bromine monoxide (BrO) derived from multiple-axis differential optical absorption spectroscopy (MAX-DOAS) instruments on O-Buoy platforms on the sea ice and at a coastal site in Utqiaġvik, Alaska during spring 2015. Model estimations of hourly and monthly average BrO are improved by assuming a constant yield of 0.1 % molecular bromine from all snowpack surfaces on ozone deposition. The blowing snow mechanism increases BrO by providing more surface area for reactive bromine recycling. The snowpack mechanism led to increased BrO across the Arctic Ocean with maximum production in coastal regions, whereas the blowing snow mechanism increases BrO in specific areas due to high surface windspeeds. Our uniform snowpack source has a greater impact on BrO mixing ratios than the blowing snow source. Model results best replicate several features of BrO observations during spring 2015 when using both mechanisms in conjunction, adding evidence that these mechanisms are both active during the Arctic Spring. Extending our transport model throughout the entire year leads to predictions of enhanced fall BrO that are not supported by observations.
Teachers’ Information and Communication Technology Competencies: The Basis for a Competency-based Training Plan

Information and Communication Technology (ICT) in education pertains to using information and communication technology to support, enhance, and optimize information delivery. The study sought to ascertain the ICT competencies of elementary teachers in District 2 of the SDO Malolos City. The study employed a descriptive-quantitative method. The standardized questionnaire was adopted from the National ICT Competency Standards for Teachers (NICS), which covered the four domains of the ICT framework in education. Data were analyzed using the mean Kruskal-Wallis Test and the Mann-Whitney U test to determine significant differences between teacher respondents’ profile and their level of National ICT Competency Standards. Results showed that teachers have a high level of competencies in Technology Operations and Concepts, Social and Ethical, and Pedagogical Domains, but an average level in the Professional domain. Likewise, a significant difference was not established in their gender, age, educational attainment, position, number of ICT-related training, and years of using ICT in teaching but found in teachers’ length of service. The findings suggest that teachers must increase their level of competence in the Professional Domain to become more proficient and effective in carrying out their duties and responsibilities. This can be accomplished through seminar workshops on professional growth and development, research, innovation, and collaboration. To maximize their ICT skills, a competency-based training program should be provided in District 2 of SDO City of Malolos schools.
Effects of transformational leadership and work engagement on managers’ creative performance

PurposeThe purpose of the study is to investigate the effect of transformational leadership on creative performance in managers and the mediation effect of work engagement. The study also explores whether manager autonomy is a moderator of the model.Design/methodology/approachThe authors captured information about transformational leadership, work engagement, creative performance and autonomy, using an experimental design and surveys among a sample of managers. They modeled the first-stage moderated mediation effect using Hayes' PROCESS macro.FindingsThe results confirm that transformational leadership is positively related to creative performance in managers. This mediation effect is partially explained by work engagement. Interestingly, autonomy was a significant moderator of the mediation effect.Practical implicationsThe findings suggest that learning to practice transformational leadership will positively move companies to increase managers' work engagement and creative performance. These outcomes have been associated with higher productivity and long-term satisfaction, which are predictors of an organization's effectiveness.Originality/valueThis paper closes a gap between transformational leadership and job demands-resources (JD-R) theory by providing evidence on the effects of transformational leadership, work engagement and autonomy on managers' creative performance. The authors supplement existing empirical tests by adopting an experimental design to eliminate potential alternative explanations.
Philosophy of Science and Educational Research: Strategies for Scientific Effectiveness and Improvement of the Education

This article is a theoretical study on the effectiveness of educational research in the context of Philosophy of science. This topic of discussion, in the area of educational research, has been the subject of intellectual debate and arises again at the beginning of the 21st century. This article outlines the challenges and opportunities for scientific effectiveness facing educational research if it aspires to contribute to the ideal of an education of excellence and quality. Nine strategies to improve scientific effectiveness in educational research are identified and discussed. As a conclusion, it is argued that the foundations of contemporary educational research need to be revisited and reformulated, parallel to the new concepts present in the philosophy of science, to face the new problems present in our society.
Master integrals for two-loop $C$-odd contribution to $e^+e^-\to \ell^+\ell^-$ process

We calculate two-loop master integrals for the process of heavy lepton pair production in $e^+e^-$ collisions. We consider the $C$-odd diagrams with three photons in the intermediate state and evaluate the corresponding families of the master integrals in the limit of zero electron mass. Our results for the master integrals are directly applicable in the whole physical region corresponding to the annihilation channel.
Application of nonlinear correction algorithm in near infrared spectra analysis during on-site quick detection

Performance of portable near-infrared spectrometers is easily affected by various factors such as on-site environment, which results in a certain deviation in the on-site predicted results. Partially least square regression (PLSR), as a multiple linear regression method, has been widely used for the analysis of near-infrared (NIR) spectroscopy. However, due to the nonlinear characteristics of the relationship between spectral data and dependent variables, PLSR can easily lead to model errors. Stability and predictability decreased when PLSR is applied in on-site quick detection. How to reduce the errors caused by various environmental factors in the use of portable near-infrared spectrometers is a key issue in promoting the wide application of rapid detection technology based on near-infrared spectral analysis. In this study, the absorption spectra data of glucose solutions of different concentrations are collected by a portable near-infrared spectrometer. Several nonlinear correction algorithms are applied to study the effect of environmental interference during the measurement process. Firstly, the collected spectra data is preprocessed. Secondly, the data is modeled by nonlinear correction algorithms such as optimized artificial neural network (ANN), support vector regression (SVR), and random forest (RF). The impact of different models is compared with to the results using PLSR. It is found that compared with the PLSR linear method, the ANN, SVR and RF nonlinear correction algorithm can eliminate the interference of environmental factors in different degrees. Therefore, ANN, SVR and RF algorithm can improve the prediction accuracy of the model. This study shows that the use of nonlinear correction algorithm for data modeling of portable near-infrared spectrometers can effectively improve the predictive performance of the model.
Analysis of a new stabilized discontinuous Galerkin method for the reaction-diffusion problem with discontinuous coefficient

In this paper, a new stabilized discontinuous Galerkin method within a new function space setting is introduced, which involves an extra stabilization term on the normal fluxes across the element interfaces. It is different from the general DG methods. The formulation satisfies a local conservation property and we prove well posedness of the new formulation by Inf-Sup condition. A priori error estimates are derived, which are verified by a 2D experiment on a reaction-diffusion type model problem.
Comprehensive procedure for personalized dosimetry in computed tomography.

The purpose of this work is to develop viable procedures for verifying the applicability of personalized dosimetry in computed tomography (CT) using Monte Carlo-based simulations. Mobile equipment together with customized software was developed and used for rapid, non-invasive determination of equivalent source models of CT scanners under clinical conditions. Standard and anthropomorphic CT dose phantoms equipped with real-time CT dose probes at five representative positions were scanned. The accumulated dose was measured during the scan at the five positions. ImpactMC, a Monte Carlo-based CT dose software program, was used to simulate the scan. The necessary inputs were obtained from the scan parameters, from the equivalent source models and from the material-segmented CT images of the phantoms. Post-scan 3D dose distributions in the phantoms were simulated and the dose values calculated at the five positions inside the phantom were compared to measured dose values. Initial results were obtained by means of a General Electric Optima CT 660 and a Toshiba (Canon) Aquilion ONE. In general, the measured and calculated dose values were within relative uncertainties that had been estimated to be less than 10%. The procedures developed, which allow the post-CT scan dose to be measured and calculated at five points inside anthropomorphic phantoms, were found to be viable and rapid. The procedures are applicable to any scanner type under clinical conditions. Results show that the procedures are well suited for verifying the applicability of personalized CT dosimetry based on post-scan Monte Carlo calculations.
Some implications for the early chemical and dynamical evolution of the Large Magellanic Cloud from observations of the oldest globular clusters

Observations of giant stars in the oldest Large Magellanic Cloud (LMC) globular clusters were used to deduce metal abundances and radial velocities for the clusters. From the distribution of metallicities, radial velocities, position in the sky, position in the two-color diagram, color-magnitude diagram morphology, and distribution of ellipticities, we argue that these clusters make up a different dynamical component from the young disk (i.e., halo). Based on this conclusion, we present a tentative scenario for the early chemical and dynamical evolution of the LMC. Subject headings: clusters: globular: galaxies: Magellanic Clouds: galaxies: stellar content: stars; abundances: stars: evolution
The Disk Wind in the Neutron Star Low-mass X-Ray Binary GX 13+1

We present the analysis of seven Chandra High Energy Transmission Grating Spectrometer and six simultaneous RXTE Proportional Counter Array observations of the persistent neutron star (NS) low-mass X-ray binary GX 13+1 on its normal and horizontal branches. Across nearly 10 years, GX 13+1 is consistently found to be accreting at 50%–70% Eddington, and all observations exhibit multiple narrow, blueshifted absorption features, the signature of a disk wind, despite the association of normal and horizontal branches with jet activity. A single absorber with standard abundances cannot account for all seven major disk wind features, indicating multiple absorption zones may be present. Two or three absorbers can produce all of the absorption features at their observed broadened widths and reveal that multiple kinematic components produce the accretion disk wind signature. Assuming the most ionized absorber reflects the physical conditions closest to the NS, we estimate a wind launching radius of 7 × 1010 cm, for an electron density of 1012 cm−3. This is consistent with the Compton radius and also with a thermally driven wind. Because of the source’s high Eddington fraction, radiation pressure likely facilitates the wind launching.