Cross Paths Research Articles

Design of magneto-inductive waveguide in 2-d magnetic metamaterial structure for wireless power transfer and near-field communications

<p>Recently, significant research has been conducted on magnetic metamaterials that exhibit negative permeability and operate within the GHz and MHz frequency ranges. These metamaterial structures can be utilized to improve the efficiency of near-field wireless power transfer systems, subterranean communication, and position sensors. However, in most cases, they are only designed to work for a single application. This study focuses on examining the transmission of magneto-inductive waves in magnetic metamaterial structures with ordered arrangements. This structure can be used simultaneously for wireless power transfer and near-field communications. The unit cell is formed by a spiral with five turns that is implanted on a FR-4 substrate. An external capacitor was used to regulate the resonant frequency of the magnetic metamaterial unit cell. The properties of magneto-inductive waves, including reflection, transmission response, and field distribution on the waveguide, have been extensively computed and simulated. The obtained results indicate that both 1-dimensional and 2-dimensional magnetic metamaterial configurations possess the ability to conduct electromagnetic waves and propagate magnetic field energy at a frequency of 13.56 MHz. The straight and cross path configurations were also investigated to identify the optimal configuration on the 2-dimensional metamaterial slab.</p>

Shear mechanical behavior and fracturing path of red sandstone treated by joninted effect of water-fractures

Water content and primary fractures can change the mechanical characteristics of rock, making it easy to induce geological disasters. Therefore, direct shear tests of red sandstone under the action of water-fracture were carried out in this paper. The results show that shear strength of rock samples with fractures is less than that of intact rock samples. With the increase of primary fracture dip angle, shear strength and macroscopic crushing area of the rock sample increases first and then decreases with 20° as the boundary. It shows that the primary fractures weaken the shear mechanical properties and change the macroscopic failure mode. The shear performance of water-bearing rock samples is weaker than that of intact rock samples, and the weakening degree of water-saturated on shear performance of rock samples is lower than that of unsaturated water state. The fracture surfaces of rock samples are divided into 'shortest path single through type', 'longest path single through type' and 'cross path through type'. The failured rock samples are divided into 'single through type' and 'cross through type'. The research results can provide reference for geological disaster management under relevant conditions.

TCANet: Three-dimensional cross-attention mechanism for stereo-matching

Abstract Effective disparity estimation is a current hotspot in stereo vision research, and cost aggregation is an important part of disparity prediction. How to perform more effective cost aggregation is the core step to improve the accuracy of disparity prediction. In previous studies, 3DCNN with a stacked hourglass structure is often used for cost aggregation. In this research, we propose an effective 3D cross-attention stereo network that utilizes the attention mechanism to obtain contextual information for cost aggregation in a more efficient way. Specifically, the 3D cross-attention module in TCANet acquires the geometric information of all pixels on the 3D cross path. By repeating this operation twice, each pixel can eventually obtain global dependencies from all other pixels. Using the 3D cross-attention module in a stacked hourglass-structured 3DCNN only increases the number of parameters by a very small amount, which can effectively improve the performance of the model. Experimental results show that TCANet performs well on virtual dataset Scene Flow and realistic KITTI datasets.

Achieving excellent bond strength and tensile strength synergy of ultrafine-grained Al/Cu bimetallic sheets developed by an innovative hybrid manufacturing process

In the present work, two new parameters that influence the bond strength and tensile strength of Al/Cu bimetallic sheets are explored using an innovative hybrid manufacturing process. The innovative hybrid manufacturing process includes engineering of four different microstructures, 1. Ultrafine grained (UFG); 2. Bimodal grained (BM); 3. Fine grained (FG) and 4. Coarse grained (CG) in parent Cu and Al via integration of cryogenic based thermo-mechanical treatment followed by an unique tailored criss-cross surface pattern generation and high deformation roll bonding to develop high performance Al/Cu engineered sheets with four microstructural combinations: UFG‐Al + UFG-Cu, UFG‐Al + BM-Cu, UFG‐Al + FG-Cu and CG‐Al + CG-Cu. The criss-cross pattern aids in initiation of crack at the junctions and fissure formations at cross paths during the roll bonding process. This kind of pattern develops mechanical bond in the form of nugget bunches, which result in enhancement of bond strength in all the microstructural combinations of Al/Cu bimetallic sheets. The ascending order of increase in bond strength-tensile strength synergy of all four engineered microstructural combinations is: CG‐Al + CG-Cu, UFG‐Al + FG-Cu, UFG‐Al + BM-Cu and UFG‐Al + UFG-Cu. The UFG‐Al + UFG-Cu combination has achieved an extraordinary bond strength of 18 N/mm, which is almost 1.6 times the bond strength of its conventional coarse grained counterpart CG‐Al + CG-Cu combination (10 N/mm). Similarly, the UFG‐Al + UFG-Cu combination showed excellent tensile strength of 323 MPa which is around 25 % higher than that of CG‐Al + CG-Cu combination (258 MPa). The engineered UFG microstructure in Al and Cu samples promote the dynamic recrystallization and partial diffusion kinetics at the interface region and established the mechanical and metallurgical bonding between Al/Cu bimetallic sheets during roll bonding process. The adopted surface pattern and the engineered microstructure have enhanced the bond strength and tensile strength of Al/Cu bimetallic sheets both at macro and micro levels. The underlying scientific knowhow for obtaining excellent bond strength-mechanical property synergy in the engineered Al/Cu bimetallic sheets are established.

Unwinding of a eukaryotic origin of replication visualized by cryo-EM

To prevent detrimental chromosome re-replication, DNA loading of a double hexamer of the minichromosome maintenance (MCM) replicative helicase is temporally separated from DNA unwinding. Upon S-phase transition in yeast, DNA unwinding is achieved in two steps: limited opening of the double helix and topological separation of the two DNA strands. First, Cdc45, GINS and Polε engage MCM to assemble a double CMGE with two partially separated hexamers that nucleate DNA melting. In the second step, triggered by Mcm10, two CMGEs separate completely, eject the lagging-strand template and cross paths. To understand Mcm10 during helicase activation, we used biochemical reconstitution with cryogenic electron microscopy. We found that Mcm10 splits the double CMGE by engaging the N-terminal homo-dimerization face of MCM. To eject the lagging strand, DNA unwinding is started from the N-terminal side of MCM while the hexamer channel becomes too narrow to harbor duplex DNA.

Maintenance and transformation method for a multi-AUV dense formation

Accurate formation maintenance and safe formation transformations are significant challenges for multiple autonomous underwater vehicle (multi-AUV) dense formations. To address these problems, an innovative control method for a multi-AUV dense formation is proposed. First, a model predictive controller (MPC) that considers AUV input constraints and external disturbances is designed such that a multi-AUV dense formation can accurately maintain a desired formation while tracking a reference trajectory. After that, at the kinematics level, an optimal path for a safe and efficient multi-AUV dense formation transformation is generated based on the Hungarian method. Furthermore, considering an underactuated and nonlinear AUV dynamics model at the dynamics level, a potential function based on collision avoidance is established. It is added to the MPC objective function to further guarantee the potential of the formation transformation. Finally, a multi-AUV dense formation maintenance simulation shows that the proposed method can guarantee higher trajectory tracking accuracy than other algorithms. A multi-AUV dense formation transformation simulation shows that the proposed method avoids the occurrence of cross paths and a safe distance between AUVs is always maintained. The above results demonstrate that multi-AUV dense formations can achieve accurate maintenance and safe transformations, and the proposed method is feasible and effective.

Associations between empirically proportionate and disproportionate fears of cancer recurrence and anxiety and depression in uveal melanoma survivors: Five-year prospective study.

Fear of cancer recurrence (FCR) may develop into elevated anxiety or depression symptoms, but few risk factors for this development are known. Objective recurrence risk estimation is possible in some cancers. Using theories of risk communication and phobias, we examined whether the proportionality of FCR to known objective recurrence risk influences the development of anxiety and depression symptoms. Uveal melanoma (UM) patients can opt for reliable prognostic testing. Patients experience either a 'good' or 'poor' prognostic outcome, whereby 10-year mortality due to metastatic disease is, respectively, low or high. In a five-year prospective study of a consecutive sample of 589 UM survivors, we used random intercept cross lagged panel analyses to examine whether proportionality differentially influences whether FCR progresses to anxiety and depression. Positive cross paths predicting anxiety from FCR were stronger in the poor prognosis group than the good prognosis and not tested groups. Prognostic group differences were not evident for depression. FCR was more likely to progress to elevated anxiety symptoms when proportionate to the known objective recurrence risk. Objective evidence may play a prominent role in the development and structure of fear because it assumes a high epistemic weight that activates a wide range of emotional and cognitive responses. Interventions that assist survivors to tolerate FCR in the presence of higher recurrence risks may be important in reducing anxiety symptoms.

Charting the Course of AI in Business Sustainability: A Bibliometric Analysis

Abstract Artificial intelligence (AI) sparked the attention of both researchers and the business community worldwide and has become a buzzword. Similarly, (business) sustainability emerged as a prominent and pivotal concept. Given the rapid evolution of the technological advancement in AI and its potential impact(s), this paper aims to identify the ways in which AI crosses paths with business sustainability, to provide an overview of the topic and to uncover research trends using a bibliometric approach. In order to reach the research goal of the paper, we investigated the academic literature published and indexed in Scopus database using computer assisted quantitative techniques on bibliometric data and with the help of VOSviewer we visually emphasized the interconnections between fields and results. Ultimately, the present paper intends to contribute to a deeper understanding of the symbiotic relationship between AI and business sustainability, by providing insights that are purposed to enhance the academic discourse in a rapidly evolving domain.

Professional identification in the beginning of a teacher's career: a longitudinal study on identity formation and the basic psychological need for autonomy in VET teacher training.

This study examines the extent to which VET trainee teachers' identification with their profession is related to their basic psychological need for autonomy and whether this is reflected in their intention to stay in the field. Trainee's subjective experience of their professional identity interacts with different conditions of the training environment, whereby we focus on perceived autonomy support and autonomy thwarting behavior of seminar teachers. On the basis of a longitudinal design with a total of 79 trainee teachers in Germany and four survey time points during teacher training, corresponding developmental processes were traced over a total period of 1 year. Cross-lagged panel analyses allow us to draw conclusions about the extent to which professional identification of trainees interacts with autonomy-support or autonomy-thwarting conditions originating from seminar teachers and to what extent the aforementioned factors in turn affect intention to stay. Cross-lagged panel analyses show that professional identification after 6 months in teacher training significantly predicts the intention to stay in the teaching profession half a year later. Significant cross paths each describe positive effects between professional identification and autonomy support and negative effects between professional identification and autonomy thwarting. Particularly against the background of the shortage of teachers in Germany and other countries, the promotion of professional identification processes in the sense of a teacher identity can be assessed as crucial. In this respect, an autonomy-supporting environment, e.g., created by seminar teachers, can already contribute to that during teacher training.

Bla(CK)mau Xperience

Combining their artistic strengths and creative pursuits together, bla(CK)mau conjures sonic spells, vast visualizations, and entrancing events. Their work is steeped in Blackness in all its identities at all times and seeks to explore the realm of placemaking for Black folks. This digital art piece, the bla(CK)mau Xperience, is a sound and video collage experiment consisting of previously created works, new sonics, and bla(CK)mau-isms. This work imagines their character on a journey through time and space where she crosses paths with others on the narrow path. The soundtrack of the experience plays as we join her in experiencing something new in a funkier time and space.

Robot Gaze During Autonomous Navigation and Its Effect on Social Presence

As robots have become increasingly common in human-rich environments, it is critical that they are able to exhibit social cues to be perceived as a cooperative and socially-conformant team member. We investigate the effect of robot gaze cues on people’s subjective perceptions of a mobile robot as a socially present entity in three common hallway navigation scenarios. The tested robot gaze behaviors were path-oriented (looking at its own future path), or human-oriented (looking at the nearest person), with fixed-gaze as the control. We conduct a real-world study with 36 participants who walked through the hallway, and an online study with 233 participants who were shown simulated videos of the same scenarios. Our results suggest that the preferred gaze behavior is scenario-dependent. Human-oriented gaze behaviors which acknowledge the presence of the human are generally preferred when the robot and human cross paths. However, this benefit is diminished in scenarios that involve less implicit interaction between the robot and the human.

DENV and ZIKV cross paths.

DENV and ZIKV cross paths.

Lightweight aerial image object detection algorithm based on improved YOLOv5s

YOLOv5 is one of the most popular object detection algorithms, which is divided into multiple series according to the control of network depth and width. To realize the deployment of mobile devices or embedded devices, the paper proposes a lightweight aerial image object detection algorithm (LAI-YOLOv5s) based on the improvement of YOLOv5s with a relatively small amount of calculation and parameter and relatively fast reasoning speed. Firstly, to better detect small objects, the paper replaces the minimum detection head with the maximum detection head and proposes a new feature fusion method, DFM-CPFN(Deep Feature Map Cross Path Fusion Network), to enrich the semantic information of deep features. Secondly, the paper designs a new module based on VoVNet to improve the feature extraction ability of the backbone network. Finally, based on the idea of ShuffleNetV2, the paper makes the network more lightweight without affecting detection accuracy. Based on the VisDrone2019 dataset, the detection accuracy of LAI-YOLOv5s on the mAP@0.5 index is 8.3% higher than that of the original algorithm. Compared with other series of YOLOv5 and YOLOv3 algorithms, LAI-YOLOv5s has the advantages of low computational cost and high detection accuracy.

Ultra-precision manufacturing of microlens arrays using an optimum machining process chain.

There are still significant challenges in the accurate and uniform manufacturing of microlens arrays (MLAs) with advanced ultra-precision diamond cutting technologies due to increasingly stringent requirements and shape complexity. In this paper, an optimum machining process chain is proposed based on the integration of a micro-abrasive fluid jet polishing (MAFJP) process to improve the machining quality by single point diamond turning (SPDT). The MLAs were first machined and compensated by SPDT until the maximum possible surface quality was obtained. The MAFJP was used to correct the surface form error and reduce the nonuniformity for each lens. The polishing characterization was analyzed based on the computational fluid dynamics (CFD) method to enhance the polishing efficiency. To better polish the freeform surface, two-step tool path generation using a regional adaptive path and a raster and cross path was employed. Moreover, the compensation error map was also investigated by revealing the relationship between the material removal mechanism and the surface curvature and polishing parameters. A series of experiments were conducted to prove the reliability and capability of the proposed method. The results indicate that the two integrated machining processes are capable of improving the surface form accuracy with a decrease in PV value from 1.67 µm to 0.56 µm and also elimination of the nonuniform surface error for the lenses.

Функційні вияви парцелятів в ідіостилі Івана Франка

The article is devoted to the study of parcelat, which is one of the means of expressive syntax. The use of parcellation is characteristic feature of artistic and conversational styles, which demonstrates the combination of various syntactic forms of expression dictated by communicative requirements. Parcelat is the result of the segmentation of a sentence as a complete syntactic and intonation-content structure into several elements (basic part and segment) in order to actualize individual fragments of the message. In the context of the theory of actual articulation, the main part (core) of the parcelat occupies the thematic position, and the segment (parcel) is an expression of the rheme. The lack of linguistic works dedicated to the study of parcelat in the artistic heritage of Ivan Franko arouses scientific interest in studying the peculiarities of the functioning of parcelat in the writer's artistic works and determining their tasks in achieving a perlocutionary effect on the reader. The purpose of the scientific article is to study the peculiarities of the functioning of parcelat within a simple sentence based on the materials of Ivan Franko's literary works ("Petrii and Dovbuschuku" (1 ed.), "Borislav laughs", "Cross paths", "Petrii and Dovbuschuku" (2 ed.)), belonging to different periods of the writer's creativity. Parceled homogeneous predicates are the most used within a simple sentence, parceled homogeneous adjuncts, homogeneous circumstances and parceled predicate, meaning, adjunct, circumstance and the main member of a one-syllable sentence are much less recorded. Most often, the writer used parcelat with a non-conjunctive connection, less often – with a conjunctive one, sporadically used parcelat, the formal marker of which is a dot pause between the components. We note the quantitative growth of cases of parcellation in the writer's artistic works belonging to the late period of creativity. In the research, for the first time, a comprehensive analysis of the parcelat within a simple sentence, used by Ivan Franko in the artistic works of different periods of creativity, was carried out, which made it possible to reveal dynamic processes in their functioning. We see the prospect of further exploration in the involvement of a larger number of Ivan Franko's artistic works in order to reveal their functional and pragmatic potential in the writer's idiostyle. Key words: simple sentence, segmentation, parcelat, expressive syntax, pragmatics of artistic text, Ivan Franko.

Being Wrong

Does a triumphant marriage require love? In this philosophical short story, Donna wed her high school sweetheart, nurtured three splendid offspring, only to find herself gradually adrift in emotional detachment from her husband. With her spouse laboring in a distant city, their encounters dwindle, and when they do occur, separate beds are the norm. Amidst a supportive yet ardor-deficient matrimony, Donna crosses paths with Chris, a local carpenter. An unconventional connection sparks, ultimately propelling her into an affair. The eventual decision to divorce her husband for the sake of newfound love sees her embracing Chris, a man deemed less conventionally attractive and materially successful. This choice ignites fury within her children, who lay blame on Donna for the divorce.

LOVE AMONG OLDER AFRICAN AMERICAN COUPLES: AN ACTOR PARTNER INTERDEPENDENCE MODEL ANALYSIS

Abstract Older women are often described as being asexual and uninterested in sex or intimacy (McHugh & Interligi, 2015). Thus, most research examining older couples describes those couples as primarily enjoying companionate or compassionate love – a type of love reflecting care and concern for another person (Allen et al., 2018). Unlike companionate or compassionate love, passionate love refers to a “state of intense longing for union with another” (Hatfield & Rapson, 1993, p. 67). Relatively little is known about passionate love and older couples (Hatfield & Rapson, 1993); moreover, far less is known about passionate love among African American older couples. Using data collected from African American couples (332 couples aged 20 to 39 and 90 couples aged 40 to 79), Actor-Partner Interdependence Models were used. For both age groups, 20 to 39 and 40 to 79, husbands’ and wives’ reports of marital quality were significantly associated with each other at Time 1. Husbands’ and wives’ reports of passionate love (assessed at Time 2) were not significantly associated with each other – for either age group under study. Cross paths (partner effects) were not significant for either of the two age groups; wives’ marital quality (Time 1) did not significantly predict husbands’ passionate love (Time 2), nor did husbands’ marital quality (Time 1) predict wives passionate love (Time 2). It is important to note that the older and younger age groups exhibited a similar pattern of results, suggesting that passion and physical intimacy may operate in similar ways for both.

Parameter adaptation-based ant colony optimization with dynamic hybrid mechanism

In this paper, a parameter adaptation-based ant colony optimization (ACO) algorithm based on particle swarm optimization (PSO) algorithm with the global optimization ability, fuzzy system with the fuzzy reasoning ability and 3-Opt algorithm with local search ability, namely PF3SACO is proposed to improve the optimization ability and convergence, avoid to fall into local optimum. In the PF3SACO, a new dynamic parameter adjustment mechanism by the PSO and the fuzzy system is designed to adaptively adjust the pheromone importance factor α, pheromone volatilization coefficient ρ and the heuristic function importance factor β to accelerate the convergence, improve the search ability, enhance the local search ability and avoid premature. This is achievable by parameter adaptation to reflect the dynamic search characteristic by exploring and exploiting in the search process for the parameter values to be close to the optimal values. In addition, 3-Opt algorithm is applied to optimize the generated path to eliminate the cross path, obtain the optimal path and avoid to fall into local optimum. The optimization performance of the PF3SACO is investigated on fifteen travelling salesman problems (TSPs) with the scales from 42 to 783 cities. The experiment results show that the PF3SACO has better optimization performance by comparing with ABC, NACO, HYBRID, ACO-3Opt, PACO-3Opt, PSO-ACO-3Opt and some other well-known algorithms in most TSP in term of the solution quality, robustness and space distribution. It provides a reference to solve the large-scale TSP for obtaining better path length.

Let everyone know they matter

Connie Shipman Newsome, M.P.A., Ed.D., strives to let everyone she crosses paths with in her work know they matter. That includes the faculty; administrators at all levels; students, regardless of their year or class rank; team members; and support staff. Being able to support those people in the campus community is one of the reasons Newsome really enjoys her work as Registrar at the Campbell University School of Law in North Carolina.

Girlhood in Verses

Few creative protagonists in girls’ coming-of-age fiction, especially those authored by women, have escaped the lure of poetry writing. And yet from introspective diarists to fervent letter-writers to passionate storytellers, what seems less visible in current scholarly conversation on girls’ literature are discussions surrounding girls as aspiring poets. My article considers representations of poetry writing in two landmark texts by women, Emily of New Moon (1923) by Lucy Maud Montgomery and The Poet X (2018) by Elizabeth Acevedo, paying special attention to how poetry writing serves particular purposes for the characters as they search for means of self-representation and self-expression to resist practices that undermine their voice. Despite being published in significantly different time periods, Montgomery’s and Acevedo’s works cross paths in terms of how they represent the power of poetry writing for adolescent girl protagonists: poetry operates as a means of negotiating conflicted identities or subjectivities, reconstructing their own notions of time, and performing their bodies. Whilst this article attempts to sketch a tentative case for the usefulness of poetry in girls’ texts then and now, it concludes with suggestions for future research that might shed more light on the continual appeal of poetry in narratives of girlhood.