Central Position Research Articles

Flipped classroom in financial accounting: analysis of student perception

In Higher Education and in Financial Accounting, we have designed an educational innovation, within a comprehensive learning approach, through the use of the "flipped classroom" methodology, "blended learning", e-rubrics, collaborative learning and self-assessment / Peer evaluation, guiding us towards a formative and shared evaluation, being implemented in "Financial Accounting III" during the 2020-2021 and 2021-2022 academic years. The purpose of this work is, within a «Design-Based Research» strategy, to explore the perception and satisfaction of the student with the «flipped classroom» methodology and if it differs according to the student's gender, an experience in the classroom where they participated 67 students, with a non-probabilistic sample of 39 students who completed the questionnaire hosted on the Moodle platform, an instrument with a reliability level of α= .940 (Cronbach's Alpha). For the analysis and discussion of the results, measures of central position and dispersion have been used, together with the Mann Whitney U statistic, showing the results a positive perception of the students towards the adopted methodology, without significant differences depending on their gender, a finding that provides support to higher education financial accounting professors interested in using the flipped classroom.

Hyperspectral image classification using a double-branch hierarchical partial convolution network

ABSTRACT Recently, convolutional neural network (CNN) and Transformer have been successfully applied in hyperspectral image (HSI) classification. Despite their success, some challenges persist. Popular HSI classification methods typically employ only a single patch as the network input, which may not provide robust information for various datasets or within different scenarios of a specific dataset. Large-scale patches are usually conducive to classifying large-scale scenes, while small-scale patches excel at classifying boundary locations. In addition, the majority of methods do not distinguish between the central pixel and its adjacent pixels, although the information from the central position is crucial. In this paper, a novel double-branch hierarchical partial convolution network (DBHP-Net) is proposed to address the aforementioned challenges. Concretely, DBHP-Net employs a new convolution, named TConv, to emphasize mining the spatial-channel features of the central position. Then, the TConvFormer Block is built by adopting the advanced engineering techniques of Transformer. Furthermore, we construct our model in a hierarchical style. The double-branch structure with large-scale and small-scale patches provides complementary information from the dataset. Experimental results based on randomly selected samples and spatially disjoint samples of two benchmark datasets demonstrate that our method outperforms other state-of-the-art (SOTA) methods.

Method for estimating the geometric parameters of the radiating aperture of a deployable phased antenna array

The effectiveness of the functioning of radio engineering systems largely depends on the possibility of providing the specified directional parameters of the antenna systems used in their composition. For large-sized deployable antenna arrays operating as part of autonomous radio engineering complexes, the problem of maintaining the specified directional parameters is especially relevant due to possible errors in the installation of the antenna array phase centers after deployment. The purpose of this work was to develop a method for estimating the position of the phase centers of antenna elements in the radiating aperture of a phased array antenna array based on the results of measuring the phases of signals received from a source in the far zone. In the general formulation, a method has been developed that allows, based on the results of measurements of the phases of signals received from a source in the far zone, to determine the geometry of the radiating aperture of a phased array antenna. Subsequently, the obtained geometric parameters make it possible to adjust the amplitude-phase distribution to preserve the parameters of the generated radiation pattern. It has been shown that the use of the developed method allows, based on the results of measuring the phases of signals received from a source in the far zone, to determine the actual position of phase centers of antenna elements in the radiating aperture of the phased array after deployment, on the basis of which correction of the amplitude-phase distribution is performed, which allows reducing the deviation of the generated radiation pattern from the set one due to errors in antenna deployment. The following main results have been obtained: 1. The obtained relations make it possible to reduce the problem of estimating the geometric parameters of the radiating aperture of the deployed phased array based on the results of phase measurements at the outputs of antenna elements to solving an overridden system of linear algebraic equations with respect to unknown errors in the angles of deployment of sections of the phased array. 2. The conducted studies of accuracy of estimating the geometric parameters of the radiating aperture of the phased antenna array and formation of the radiation pattern showed: with an increase in the number of antenna elements in the section and, accordingly, in the radiating aperture of the phased array, the standard deviation of the error estimate decreases according to the law ~N–0,5; with an increase in the accuracy of estimating the angles of deployment of sections of a phased array antenna array with an increase in the number of antenna elements in the section, the accuracy of forming a radiation pattern for antennas which section size is largest in the direction perpendicular to the axis of deployment may decrease. This is due to an increase in the number of antenna elements, for which the error of their contribution to the radiation pattern compared to the standard deployment it's harder to compensate.

A marker-based approach to determine the centers of rotation of finger joints

Background and ObjectiveThe methods proposed in literature to estimate the position of hand joints Centers of Rotation (CoRs) typically require computationally non-trivial optimization routines and exploit a high number of markers to calculate CoRs positions from surface marker trajectories. Moreover, most of the existing works evaluated the accuracy only in simulation. This work proposes a new procedure, based on the Pratt circle fit, to estimate joints CoRs position in 2D through marker-based acquisitions. MethodsThe advantage of the Pratt circle fit lies in its simplicity and computational speed, and in the possibility of exploiting a reduced markerset for calculating CoRs. By applying simplifying assumptions regarding the movement of the fingers (i.e., planar and decoupled flexion-extension movements of each joint occurring in the same flexion plane for all the joints of the finger), it is possible to determine the position of the CoR of each joint in 2D. For this reason, the estimation of the Carpo-MetaCarpal joint of the thumb was not included in this work, as it exhibits a more complex movement associated to the combination of a flexion-extension and adduction-abduction degree of freedom. The errors in estimating CoRs were evaluated by conducting experimental acquisitions on an anthropomorphic robotic hand and comparing the position of the estimated CoR with the real position of the CoR. The repeatability of the method and its capability to estimate anatomically plausible CoRs were evaluated through experimental acquisitions conducted on five healthy volunteers. ResultsErrors in estimating finger joints CoRs were in the order of 0.70 mm and 0.18 mm respectively along the finger longitudinal direction (i.e., x coordinate) and thickness (i.e., y coordinate). Standard Deviations of CoRs positions were comparable to the ones obtained in literature (i.e., below 2 mm and 1 mm respectively for the x and y coordinates), thus demonstrating the repeatability of the method. The Anatomical Plausibility Rate of the proposed approach was between 80% and 100%. ConclusionsThe performance of the Pratt-based CoRs estimation procedure proposed in this work was comparable to other existing methods, with the advantage of exploiting a simple fitting algorithm and a reduced markerset with respect to the state-of-the-art techniques.

Surgical treatment of a bilateral superficial flexor tendon luxation

A two-year-old, male, neutered, crossbreed dog was presented to Anderson Moores Veterinary Specialists with a history of bilateral pelvic limb lameness. Right pelvic limb lameness was first noted 3 months prior to presentation. Right superficial digital flexor tendon tendinopathy and associated bursitis were diagnosed based on computed tomography scans performed by the referring veterinarian. Conservative management, consisting of analgesia and exercise restriction, did not resolve the clinical signs and referral was sought. At the time of presentation, left pelvic limb lameness of 1 week's duration was reported additionally by the owner. Clinical examination and imaging findings were consistent with bilateral superficial digital flexor tendon luxation. Surgical management consisting of relocation of the superficial digital flexor tendon into the central position of the calcaneal groove alongside a retinaculoplasty and calcaneoplasty was performed bilaterally. Half-cast dressings were placed on both pelvic limbs and were removed after 3 weeks due to mild soft tissue complications. The patient was cage rested for 5 weeks in total. The re-examination 8 weeks after surgical treatment revealed that the tendons remained stable and could not be manually luxated.

Tracking Rodinia Into the Neoproterozoic: New Paleomagnetic Constraints From the Jacobsville Formation

AbstractThe paleogeography of Laurentia throughout the Neoproterozoic is critical for reconstructing global paleogeography due to its central position in the supercontinent Rodinia. We develop a new paleomagnetic pole from red siltstones and fine‐grained sandstones of the early Neoproterozoic Jacobsville Formation which is now constrained to be ca. 990 Ma in age. High‐resolution thermal demagnetization experiments resolve detrital remanent magnetizations held by hematite. These directions were reoriented within siltstone intraclasts and pass intraformational conglomerate tests—giving confidence that the magnetization is detrital and primary. An inclination‐corrected mean paleomagnetic pole position for the Jacobsville Formation indicates that Laurentia's motion slowed down significantly following the onset of the Grenvillian orogeny. Prior rapid plate motion associated with closure of the Unimos Ocean between 1,110 and 1,090 Ma transitioned to slow drift of Laurentia across the equator in the late Mesoproterozoic to early Neoproterozoic. We interpret the distinct position of this well‐dated pole from those in the Grenville orogen that have been assigned a similar age to indicate that the ages of the poles associated with the Grenville Loop likely need to be revised to be younger due to prolonged exhumation.

Density distributions, magnetic field structures, and fragmentation in high-mass star formation

Context. The fragmentation of high-mass star-forming regions depends on a variety of physical parameters, including density, the magnetic field, and turbulent gas properties. Aims. We evaluate the importance of the density and magnetic field structures in relation to the fragmentation properties during high-mass star formation. Methods. Observing the large parsec-scale Stokes I millimeter dust continuum emission with the IRAM 30 m telescope and the intermediate-scale (<0.1 pc) polarized submillimeter dust emission with the Submillimeter Array toward a sample of 20 high-mass star-forming regions allows us to quantify the dependence of the fragmentation behavior of these regions on the density and magnetic field structures. Results. Based on the IRAM 30 m data, we infer density distributions n ∝ r−p of the regions with typical power-law slopes p around ~1.5. There is no obvious correlation between the power-law slopes of the density structures on larger clump scales (~1 pc) and the number of fragments on smaller core scales (<0.1 pc). Comparing the large-scale single-dish density profiles to those derived earlier from interferometric observations at smaller spatial scales, we find that the smaller-scale power-law slopes are steeper, typically around ~2.0. The flattening toward larger scales is consistent with the star-forming regions being embedded in larger cloud structures that do not decrease in density away from a particular core. The magnetic fields of several regions appear to be aligned with filamentary structures that lead toward the densest central cores. Furthermore, we find different polarization structures; some regions exhibit central polarization holes, whereas other regions show polarized emission also toward the central peak positions. Nevertheless, the polarized intensities are inversely related to the Stokes I intensities, following roughly a power-law slope of ∝ SI−0.62. We estimate magnetic field strengths between ~0.2 and ~4.5 mG, and we find no clear correlation between magnetic field strength and the fragmentation level of the regions. A comparison of the turbulent to magnetic energies shows that they are of roughly equal importance in this sample. The mass-to-flux ratios range between ~2 and ~7, consistent with collapsing star-forming regions. Conclusions. Finding no clear correlations between the present-day large-scale density structure, the magnetic field strength, and the smaller-scale fragmentation properties of the regions, indicates that the fragmentation of high-mass star-forming regions may not be affected strongly by the initial density profiles and magnetic field properties. However, considering the limited evolutionary range and spatial scales of the presented CORE analysis, future research directions should include density structure analysis of younger regions that better resemble the initial conditions, as well as connecting the observed intermediate-scale magnetic field structure with the larger-scale magnetic fields of the parental molecular clouds.

Novel Local-Chiral Metamaterial: Effective Modulation of Amplitude & Phase for Wideband Polarization-Insensitive Absorption.

Metamaterial has received widespread research in the fields of electromagnetic stealth due to its characteristics of strong resonance and flexible designability. However, a lack of a comprehensive understanding of the internal physical mechanism still imposes certain limitations on broadband absorption designs. Hence, this work proposes a new strategy for the broadening of the working frequency band of metamaterial absorbers by constructing local-chiral features to regulate the amplitude and phase information. The absorber consists of staggered cut-wire metal patterns with lumped resistors placed at the center position determined by characteristic mode analysis. Combining the modal significance, equivalent circuit, surface current, electric field distribution, and symmetry model theory, the working mechanism for wideband absorption performance has been analyzed in detail. The experimental results are in good agreement with the simulation results; the absorption rate exceeds 82% in the frequency range of 4.5-11.7 GHz and surpasses about 90% in the frequency range of 4.7-10.8 GHz under transverse electric (TE) or transverse-magnetic (TM) polarizations. Compared to the case without chiral features, the proposed design can achieve a 28% increase in operating bandwidth. The proposed design method is applicable for the optimization of various typical dipole-type metamaterial absorbers and provides a novel strategy for future wideband metamaterial absorption.

Female stereotypes and female empowerment in advertising: A systematic literature review and future research agenda

AbstractThis systematic literature review (SLR) seeks to foster the presence of feminism and women's diversity in advertising through a systematic, transparent, and rigorous framework‐based review and the 4Ws1H (What, Where, Why, and HoW) analysis. The study provides three main contributions. First, it offers an innovative conceptual framework for examining female stereotypes and female empowerment in advertising by categorizing the 21st‐century literature into the four evolutive eras of feminism: prefeminism, feminism, postfeminism, and the fourth wave of feminism. Second, this SLR reveals prevailing research trends, predominant research methodologies, frequently explored geographical regions, and industries of focus while providing a roadmap for future research endeavors. Finally, it acknowledges the lasting impact of femvertising as a response to consumer demands during the fourth wave of feminism and its role in promoting diversity and inclusion in advertising, encompassing disabilities, ethnicity, age, and gender identity. The main research trends uncovered in this study encompass the effects of female stereotypes, the sexualization of women in advertising, attitudes related to the brand, and the exploration of female empowerment. Qualitative methodologies emerged as the dominant approach in this research landscape, with a particular focus on countries boasting high gender equality. Furthermore, industries that predominantly target women in their advertising campaigns, such as fashion, luxury apparel, beauty, and personal care, occupy a central position in the existing body of literature. These findings encourage scholars to embark on future research aligned with the proposed research trends, particularly in regions characterized by lower gender equality and within gender‐neutral or male‐dominated industries.

Network analysis of neuropsychiatric, cognitive, and functional complications of stroke: implications for novel treatment targets.

Recovery from stroke is adversely affected by neuropsychiatric complications, cognitive impairment, and functional disability. Better knowledge of their mutual relationships is required to inform effective interventions. Network theory enables the conceptualization of symptoms and impairments as dynamic and mutually interacting systems. We aimed to identify interactions of poststroke complications using network analysis in diverse stroke samples. Data from 2185 patients were sourced from member studies of STROKOG (Stroke and Cognition Consortium), an international collaboration of stroke studies. Networks were generated for each cohort, whereby nodes represented neuropsychiatric symptoms, cognitive deficits, and disabilities on activities of daily living. Edges characterized associations between them. Centrality measures were used to identify hub items. Across cohorts, a single network of interrelated poststroke complications emerged. Networks exhibited dissociable depression, apathy, fatigue, cognitive impairment, and functional disability modules. Worry was the most central symptom across cohorts, irrespective of the depression scale used. Items relating to activities of daily living were also highly central nodes. Follow-up analysis in two studies revealed that individuals who worried had more densely connected networks than those free of worry (CASPER [Cognition and Affect after Stroke: Prospective Evaluation of Risks] study: S = 9.72, P = 0.038; SSS [Sydney Stroke Study]: S = 13.56, P = 0.069). Neuropsychiatric symptoms are highly interconnected with cognitive deficits and functional disabilities resulting from stroke. Given their central position and high level of connectedness, worry and activities of daily living have the potential to drive multimorbidity and mutual reinforcement between domains of poststroke complications. Targeting these factors early after stroke may have benefits that extend to other complications, leading to better stroke outcomes.

Design of auxiliary viewing mirror for filter centering drum in GD121-AF12 filter assembler

In order to solve the problem of observation blind area on the outer end face of the cigarette groove of the filter centering drum on the GD121—AF12 filter assembler, an auxiliary observation mirror was designed and installed on the inner wall nearby. According to the light reflection law, according to the space position the central position of the mirror , design the mirror surface support parts refer to the available screw holes on the mirror surface center and inner wall, and calculate the relative position and deflection angle of the support parts. Based on the above data, support parts are designed with Pro/E, and parts are made with 3D printer. After the improved equipment is blocked, the manual cleaning time is reduced to 3.2min/time, and the maintenance time is reduced by 67%, which effectively reduces the labor intensity of operators and improves the equipment efficiency.

Synthesis and Properties of Cobalt/Nickel-Iron-Antimony(III, V)-Oxo Tartrate Cluster-Based Compounds

Two types of isostructural iron-cobalt/nickel-antimony-oxo tartrate cluster-based compounds, namely (H3O)(Me2NH2)[M(H2O)6]2[FeII2SbIII12(μ4-O)3(μ3-O)8(tta)6]·6H2O (M = Co (1); Ni (3)), H5/3[Co2.5FeII4/3FeIII3(H2O)13SbV1/3FeIII2/3(μ4-O)2(μ3-O)4SbIII6(μ3-O)2(tta)6]·2H2O (2) and H2[Ni2.25FeII1.5FeIII3(H2O)14SbV0.25FeIII0.75(μ4-O)2(μ3-O)4SbIII6(μ3-O)2(tta)6]·2H2O (4) (H4tta = tartaric acid) were synthesized via simple solvothermal reactions. All the clusters in the structures adopt sandwich configurations, that is, bilayer sandwich configuration in 1 and 3 and monolayer sandwich configuration in 2 and 4. Interestingly, the monolayer sandwiched compounds 2 and 4 represent rare examples of cluster-based compounds containing mixed-valence Sb(III, V), whose center of the intermediate layer is the co-occupied [FexSbV1−x]. This is different from that of previously reported sandwich-type antimony-oxo clusters in which the center position is either occupied by a transition metal ion or a Sb(V) alone. Thus, the discovery of title compounds 2 and 4 makes the evolution of center metal ion more complete, that is, from M, MxSbV1−x to SbV. All the title compounds were fully characterized, and the photocatalysis, proton conduction and magnetism of compounds 2 and 4 were studied.

Determination of the rational shift value the center of the magnetic system electromagnetic bearing

The article sets the task of determining the rational value of the displacement of the center of the magnetic system of an electromagnetic bearing relative to the axis of rotation, at which, with equal currents in opposite electromagnets, the weight force falling on one axis of the bearing will be completely compensated. To achieve the set, the equations of motion of the rotor in the field of electromagnets are considered. It is shown that the rational value of the displacement of the center of the magnetic system is determined from a fourth-order algebraic equation. The analytical solution of Descartes-Euler of this equation is applied. Analytical expressions are found that allow to determine the rational value of the displacement of the center of the magnetic system relative to the axis of rotation according to the known parameters of the electromagnetic bearing. A study was made of the stability of a three-circuit control system of an electromagnetic bearing when the center of the magnetic system is shifted by a rational value relative to the axis of rotation. It is proved that the displacement of the center of the magnetic system by the calculated value does not affect the stability of the control system of the electromagnetic bearing with the settings of the regulators selected for the central position of the rotor.

Intramolecular carbon isotopic rollover in propane from natural gas reservoirs of the Santanghu Basin: Insights into chemical structure of kerogen

An intramolecular isotopic study was conducted on natural gases from the Santanghu Basin in China. Propane samples spanned a wide range of ΔC-T (δ13Ccentral-δ13Cterminal) values from –8.4 to 8.5 ‰, δ13Ccentral and δ13Cterminal values varied from –37.3 to –25.8 ‰ and –35.7 to –28.9 ‰, respectively. During thermal maturation, the position-specific carbon isotopic composition of propane shifted from δ13Ccentral < δ13Cterminal to δ13Ccentral > δ13Cterminal, and the δ13Cterminal decreased by 6.8 ‰ within a Ro range of 0.46–0.50 %. The intramolecular carbon isotopic rollover and a decrease in δ13Cterminal with a slight increase in maturation could be explained by kinetic effects in thermal cracking of kerogen with a low proportion of branched chains. As isomeric groups were rapidly exhausted, propane generation pathway rapidly changed and primary kinetic isotope effect completely shifted from central carbon position to terminal carbon positions in propane. These changes increased carbon isotope fractionation at terminal carbon positions, thereby reducing δ13Cterminal values and shifting δ13Ccentral < δ13Cterminal to δ13Ccentral > δ13Cterminal within a small maturity range. This work demonstrated that position-specific isotope distribution of propane can be applied to elucidate the chemical structure of kerogen.

Reducing Immunogenicity by Design: Approaches to Minimize Immunogenicity of Monoclonal Antibodies.

Monoclonal antibodies (mAbs) have transformed therapeutic strategies for various diseases. Their high specificity to target antigens makes them ideal therapeutic agents for certain diseases. However, a challenge to their application in clinical practice is their potential risk to induce unwanted immune response, termed immunogenicity. This challenge drives the continued efforts to deimmunize these protein therapeutics while maintaining their pharmacokinetic properties and therapeutic efficacy. Because mAbs hold a central position in therapeutic strategies against an array of diseases, the importance of conducting comprehensive immunogenicity risk assessment during the drug development process cannot be overstated. Such assessment necessitates the employment of in silico, in vitro, and in vivo strategies to evaluate the immunogenicity risk of mAbs. Understanding the intricacies of the mechanisms that drive mAb immunogenicity is crucial to improving their therapeutic efficacy and safety and developing the most effective strategies to determine and mitigate their immunogenic risk. This review highlights recent advances in immunogenicity prediction strategies, with a focus on protein engineering strategies used throughout development to reduce immunogenicity.

Hub‐and‐spoke social networks among Indonesian cocoa farmers homogenise farming practices

Abstract Smallholder farms support the livelihoods of 2.5 billion people and their decisions on how to manage their land has profound consequences for the environment and the food security of billions of people. However, farmers' values, norms and resulting management practices are usually not formed in isolation. Triangulating multiple analytical, modelling and simulation methods, we investigated if and how social influence exerted through peer‐to‐peer information exchange affect soil nutrition management among 2734 Indonesian smallholder cocoa farmers across 30 different villages. The results show that the relational structures of these village‐based social networks strongly relate to farmers' use of fertiliser. In villages with highly centralised networks (i.e. hub‐and‐spoke networks where one or very few farmers holds disproportionately central position in the village network), a large majority of farmers report the same fertiliser use, and that practice is typically to avoid using fertilisers. By contrast, in less centralised networks, fertiliser use varies widely. The observed community‐level distributions of fertiliser use can be most closely reproduced through simulations by complex contagion mechanisms in which social influence is only exerted by opinion leaders that are much more socially connected than others. However, even such leaders' abilities to influence others to change fertiliser use may be limited in practice. The combination of our quantitative and qualitative findings provides significant policy implications for development programs targeting smallholder farming communities. An important practical lesson is that common interventions which primarily engage socially central farmers may not be effective in stimulating desired transitions in social‐ecological systems. Read the free Plain Language Summary for this article on the Journal blog.

Why Mature Galaxies Seem to Have Filled the Universe Shortly After the Big Bang — A New Cosmological Model, that Predicted the JWST Observations

The Azimulthal Hyper-Projection onto spacetime Model (AHOSM) of Cosmology is just an extension of the familiar Atlas map of a globe in geography class. The Atlas is an azimuthal projection of 3 spacial dimensions projected onto a 2 dimensional plane. The important feature of an Atlas is that the geometry expands asymptotic toward the horizon, and is therefore POSITIONALLY DEPENDENT, such that if North America is centrally positioned, then Siberia and Alaska are viewed as extremely remote. Thus if the Bering Strait were centrally positioned, then longitudinal meridians of North America would likewise be viewed as being extremely remote. AHOSM extends this concept to a hyper-projection of hyper-spacetime (4 spacial dimensions) onto spacetime. However as viewed in spacetime, geodesics appear to be expanding outward in 3 dimensional space away from the observer. Thus by extension, AHOSM is also POSITIONALLY DEPENDENT, such that the most remote galaxies only appear to be mutually separated (from each other) with extreme distance, as viewed from our central position, and vice versa our local group of Galaxies would appear to be mutually separated with extreme distances from a remote perspective. A proposed experiment is offered to prove that the distance from Earth to Mars is measured greater from the perspective of the outer solar system and vice versa. Red-shifting is alternatively proposed as azimuthal angular projections of wavelengths \(\lambda\). Magnitude is alternatively proposed as a function of Lambert's cosine law of illumination, over expanding geodesics. This simple parsimonious model requires only a few assumptions, excluding dark energy to satisfy the Cosmological Constant \(\Lambda\), and is shown to match the Universal expansion rate, as established from supernova cosmology survey points. Galaxy rotation curves are simply and accurately explained as measured expanding geodesics and density, along the observer's line of site The justification of such a radically novel model is from recent observations from the first dataset, provided by NASA's James Webb Space Telescope (JWST) of six massive galaxies, at a time in the early universe, seem to defy conventional cosmological models, as they appear to be as mature and developed as our own local group. Such unexpected discoveries JUSTIFY A RADICALLY NOVEL MODEL OF COSMOLOGY. TO QUOTE JOEL LEJA, ASSISTANT PROFESSOR OF ASTRONOMY AND ASTROPHYSICS AT PENN STATE “IT TURNS OUT WE FOUND SOMETHING SO UNEXPECTED IT ACTUALLY CREATES PROBLEMS FOR SCIENCE. IT CALLS THE WHOLE PICTURE OF EARLY GALAXY FORMATION INTO QUESTION”.

How the Support Defines Properties of 2D Metal-Organic Frameworks: Fe-TCNQ on Graphene versus Au(111).

The functionality of 2D metal-organic frameworks (MOFs) is crucially dependent on the local environment of the embedded metal atoms. These atomic-scale details are best ascertained on MOFs supported on well-defined surfaces, but the interaction with the support often changes the MOF properties. We elucidate the extent of this effect by comparing the Fe-TCNQ 2D MOF on two weakly interacting supports: graphene and Au(111). We show that the Fe-TCNQ on graphene is nonplanar with iron in quasi-tetrahedral sites, but on Au(111) it is planarized by stronger van der Waals interaction. The differences in physical and electronic structures result in distinct properties of the supported 2D MOFs. The dz2 center position is shifted by 1.4 eV between Fe sites on the two supports, and dramatic differences in chemical reactivity are experimentally identified using a TCNQ probe molecule. These results outline the limitations of common on-surface approaches using metal supports and show that the intrinsic MOF properties can be partially retained on graphene.

Linguacultural and Cognitive Peculiarities of Linguistic Universals.

The discussion about linguistic universals, initiated over 50 years ago by J. Greenberg, remains a topic of significant interest today. While there's an ongoing debate on the universality of linguistic forms - with some supporting the notion and others dismissing it as baseless-the idea of a unifying linguistic essence stands firm. The article aims to explore the linguacultural values of language, particularly how they enable the reconstruction of ideas and stereotypes within specific segments of a language system. The research found that universal language characteristics serve as a rich source of information for those studying linguacultural aspects. These traits offer nationally determined interpretations of words, drawing from associations rooted in either tangible or cultural codes. When delving into cultural codes present within every culture, the study discerned the presence of basic and universal codes. The existence of these codes provides insights into the formation of stereotypes, which encapsulate the experiences and knowledge intrinsic to the bearers of a culture. Linguistic universals, underpinned by universal grammar and semantic foundations, occupy a central position in linguacultural examinations, especially when reconstructing cultural ideas and stereotypes. Basic and universal cultural codes inherent in each culture facilitate the creation of linguistic worldviews.

Optimization of parameters for a fringe projection measurement system by use of an improved differential evolution method.

Fringe projection 3D measurement is widely used for object surface reconstruction. While improving measurement accuracy is a crucial task. Measurement accuracy is profoundly affected by various optical structural parameters. However, the current practice of system construction lacks theoretical guidelines and often relies on the experience of the operator, inevitably leading to unpredictable error. This paper investigates a theoretical optimization model and proposes an automatic optimization method for qualitatively determining the multiple optimal optical structural parameters in fringe projection measurement system. The aim is to enhance measurement accuracy conducting a rational comprehensive optimal structural parameters design prior to the system construction. Firstly, the mathematical model of the measurement system is established based on the principle of optical triangulation, and the phase sensitivity criterion is defined as the optimization norm. Within the full measurement range, the optimization merit function is formulated by combing three positions: the center position, the left and right boundary of the CCD. The imaging effectiveness criteria and sensor geometric dimensions are taken into account as the constraint boundaries. Subsequently, a combined improved differential evolution and Levy flight optimization algorithm is applied to search for the optimal parameters. The optimal structural parameters of the system were designed based on the optimization process. Experimental results validated the improvement in measurement accuracy achieved by the optimized structural parameters.