Boundary Of Medium Research Articles

ECT image reconstruction algorithm based on Res-SEUnet

A Res-SEUnet algorithm for ECT image reconstruction is proposed to address the problem of artifacts and blurring of media boundaries in ECT (capacitance tomography) reconstructed images of high-density and small-size media. A convolutional neural network is used to extract the detail features of the LBP image and recover the edge details of the ECT inverted image. Simulation experiments are performed on various complex multi-media datasets built in Comsol and Matlab. The results of the test set show that the Res-SEUnet based ECT reconstruction algorithm can by better reconstruction results on various complex multimedia datasets. [Display omitted]

The Metamorphosis of the Novel <i>Moment in Peking</i> in Japan, Taiwan, and China

This article focuses on the migration of Lin Yutang’s most-read novel, Moment in Peking (1939), across linguistic, geographic, and media boundaries in East Asia from the 1940s to recent times. It aims to reveal how this novel, originally composed in English and published in the US during the War of Resistance against Japanese Aggression, is translated, adapted, presented, and situated in different literary, cultural and ideological contexts in Japan, Taiwan and Mainland China. Drawing on the principles of Linda Hutcheon’s theory of adaptation and the Manipulation School’s literary translation studies, my analysis highlights the agency of translators, adaptors and publishers in literary production conditioned by the evolving social, historical and political circumstances. The research contends that the metamorphosis of Moment in Peking embodies a literary power game directly linked to shifts in power dynamics between the three entities. At the cultural level, it provides insights into the intricate interplay of three distinct cultural imageries—competing, conflicting or assimilating within a relational framework.

A mortar segment-to-segment frictional contact approach in material point method

Handling contact problems in the Material Point Method (MPM) has long been a challenge. Traditional grid-based contact approaches often face issues with mesh dependency, while material point-based methods can be computationally intensive. To address these challenges, this study develops a novel mortar segment-to-segment frictional contact approach for MPM. We first introduce boundary vertices and propose an innovative kinematic update scheme for precise representation of the boundaries of the continuum media and their continuously evolving contact normals throughout the contact process. Then, we construct a weak form of contact constraints based on the mortar method to facilitate a stable segment-to-segment contact detection. To rigorously ensure the non-penetration condition, the energetic barrier method is further adopted and implemented in MPM for enforcing the contact constraints. The proposed kinematic update scheme for boundary vertices is first verified through a cantilever beam benchmark test. The verified framework is further examined through a wide range of contact scenarios, including rolling, sliding, collision of two rings, and multi-body contacts, in both small and finite deformations. The simulation results are thoroughly discussed, highlighting the significant improvements in accuracy and versatility. Potential limitations of the proposed method are also examined.

Author, Artist, Actress: China's New Women Cultural Entrepreneurs

Cutting across the boundaries of media, literature, visual arts, and cultural studies, this study examines the resurgence of cultural entrepreneurship in post-Mao China, focusing on how the new media have contributed to the rise of women cultural entrepreneurs as a new social phenomenon. It investigates the rise of China's women “cultural entrepreneurs” and their roles as tastemakers and cultural trendsetters, using three case studies from China's creative industries: author Anni Baobei, artist Cao Fei, and actress Xu Jinglei. The Chinese women cultural entrepreneurs are examined against the backdrop of the Reform-era history and growing importance of China's creative industries. Analysis explores how these entrepreneurs use the new media for content dissemination while spinning transmedia narratives about themselves. By examining female self-fashioning and the creation of the cultural entrepreneur as a new type of celebrity in China, the article aims to shed new light on the cultural and social negotiations in China's mediasphere.

"Thank You for Sharing this Fantastic Performance"

YouTube is one of the most important music media in the world today. Musical practice is reflected there in a variety of forms, from sound recordings to music videos to tutorials. The media environment that YouTube creates as a platform inscribes itself – to some degree – in the actions of those who use it. This is also the case with the YouTube drummer phenomenon, which this article examines in more detail in terms of the interplay between persona construction, music-making, media presentation, and transmedia content concatenation. The thesis is pursued that the practice of YouTube drummers creates a singular interference space of conventions, modes of action, and social roles, which in some places has novelty value with regard to music-related persona constructions and their implementation in platform-based audiovisual media, and which transcends media boundaries. The specificity of the persona construction essentially results from the mediating position of the drum-playing actors: they are not only performers who, like social media influencers, push into the light of publicity, but at the same time musical experts and instructors, quasi-curatorial music communicators who select, prepare, and present music of the past, and intermediaries of the corporeality of popular music. The analyses presented are based on exploratory investigations of the YouTube drummer field itself and a case study.

Simultaneous Reconstruction of Multiple Time-Varying Thermal Properties Based on Translucent Materials.

In the realm of high-tech materials and energy applications, accurately measuring the transient heat flow at media boundaries and the internal thermal conductivity of materials in harsh heat exchange environments poses a significant challenge when using conventional direct measurement methods. Consequently, the study of photothermal parameter reconstruction in translucent media, which relies on indirect measurement techniques, has crucial practical value. Current research on reconstructing photothermal properties within participating media typically focuses on single-objective or time-invariant properties. There is a pressing need to develop effective methods for the simultaneous reconstruction of time-varying thermal flow fields and internal thermal conductivity at the boundaries of participating media. This paper introduces a computational model based on the numerical simulation theory of internal heat transfer systems in participating media, stochastic particle swarm optimization algorithms, and Kalman filter technology. The model aims to enable the simultaneous reconstruction of various thermal parameters within the target medium. Our results demonstrate that under varying levels of measurement noise, the inversion results for different target parameters exhibit slight oscillations around the true values, leading to a reduction in reconstruction accuracy. However, overall, the model demonstrates robustness and accuracy in ideal conditions, validating its effectiveness.

Global discourses of protest and support of offshore wind energy

As offshore wind energy (OWE) grows popular, stakeholder support and opposition are critical for ongoing development. Platforms like Twitter (X) allow stakeholders to engage and discuss energy sources, often catalyzing future energy movements and actions. The global nature of wind energy development and the diminished geographical boundaries of social media intersect while studying OWE development. This study explores how social media users discursively construct the global nature of OWE through Twitter. Through a discourse analysis of 4,922 tweets, this project reveals that users readily adopt a “globalization lens” when communicating about OWE. When users adopt the globalization lens, they connect local examples to global goals, generalize activist groups, analyze the value of OWE, call for international support of local or national groups, and position regions and countries against each other as leaders in OWE.

The formulation of sound transmission problems through the boundaries of three-dimensional media and through plates

The formulation of sound transmission problems through the boundaries of three-dimensional media and through plates

The In-House Balance: Negotiating Professional Identity, Boundaries, and Ethical Quandaries as an In-House Sports Reporter

ABSTRACT The sports media landscape has shifted to favor outlets with inside access to sports organizations, teams, and athletes. This study interviews 21 NFL in-house reporters working at 19 official team websites to determine how they view their roles as sports journalists, including ethical standards and shifts in media boundaries. Qualitative interviews uncovered that cultivating a positive team image and protecting the interests of stakeholders supersede the production of objective news stories, even from those who started their careers as external sports reporters. Internal reporters are often conflicted with their roles in the sports media ecosystem. Additionally, interviews reveal their efforts to maintain a balancing act between the established ideals of journalism with the positive spin that accompanies public relations. The present study illuminates how such positions both mirror and diverge from the expectations typically placed within sports journalism, while offering fruitful avenues for subsequent scholarly investigation.

Peak Acceleration Distribution on the Surface of Reef Islands under the Action of Vertical Ground Motion

This paper adopts the fluid–structure coupling algorithm based on the acoustic fluid element, the fluid dynamic artificial boundary, and the consistent viscoelastic artificial boundary of solid media to establish a finite element model of the dynamic interaction of the reef-island–seawater system. Then, a numerical simulation of the seismic response of the reef-island site is carried out to study the seismic ground motion distribution patterns of the reef–seawater site and the reef-island–lagoon site. The innovation of this article is that the influence of reef–island topography and fluid–structure coupling is considered in the analysis when vertical ground motion is input. The results show that the slope angle of the bottom layer has a significant influence on the peak ground acceleration distribution and peak size on the island slope surface and the reef platform. For high-frequency input motion, a smaller reef platform width will induce a larger peak acceleration response on the reef platform. Seawater has a significant suppressive effect on vertical ground acceleration. The more high-frequency components of the input bedrock motion, the more obvious this suppression effect will be. The existence of the lagoon will amplify the maximum peak acceleration on the reef platform. According to the calculation results, lagoon terrain can amplify the maximum horizontal and vertical peak accelerations on the reef platform by about 19 and 6 times relative to the free-field results, respectively.

Tattoos as multimodal semiotic assemblages

Abstract Drawing on interviews with, and images from, a selection of female participants, we develop the notion of semiotic assemblages to examine tattoos as mobile semiotic material for embodied meaning-making, with multi-located trajectories linking the tattooed bodies to different spatial networks. In turn, we draw on the social semiotic approach to multimodality by looking at assemblages of tattoos as vibrant material, pregnant with thing-power which, while re-making the bodies of individual tattoo owners, simultaneously shapes and semiotically remediates physical and affective (e.g. emotional and memorial) objects and feelings. We illustrate how corporeal materials and activities, and the incorporeal conceptual, perceptual and affective senses and feelings are remediated across boundaries of language, geography, semiotic modes, media, and chains of mediation to make meaning. We end with a suggestion that multimodal analysis of semiotic assemblages needs to take a multiscalar approach to account for mobilities, movements and flow, and the continuities and disconnections in forms and meanings the dynamics of the connectedness produce across different scales.

Numerical simulation of diesel particulate filter flow characteristics optimization: From the perspective of pore structure parameters and inlet velocity

The diesel particulate filter (DPF) with porous media structure has become an essential component for diesel engines to satisfy increasingly strict emission standards. This study constructed a porous media structure model of DPF, and optimized its boundary to conduct a simulation on the flow characteristic with different influencing parameters using the lattice Boltzmann method (LBM). Results showed that the increase of the average flow velocity of the DPF model reduced the pressure drop, indicating that the flow probability of model improved. In addition, the porosity application range was expanded. The visualization and quantization of the velocity and pressure distribution with the DPF revealed that an increase of the wall thickness resulted in a higher pressure drop of the DPF, but a lower flow velocity. Further, the fractal dimension of the porous media exhibited no direct relationship with the DPF pressure and velocity performance; however, the outlet velocity and pressure drop of the model were optimized within the different porosity. Moreover, both the increase in the spectral dimension and model optimization improved the DPF permeability. The impact of increasing the inlet velocity on the pressure drop was particularly significant as it accelerated the rate of pressure drop, illustrating that a smoother porous media boundary was conducive to improve the flow performance of DPF, which facilitated a better scheme for the design of DPF porous media.

Wavefield boundary interactions in a multi-domain environment—Experimental results

Acoustic and seismic signals may be generated and received in land, air, and water domains within a multi-domain environment such as a littoral (nearshore) zone. As the energy moves between domains, the waves undergo complex transformations at the media boundaries. Separate consideration of each physical domain (land, air, water) leads to an incomplete understanding of the full cross-domain wavefield, leading to significant challenges in interpreting signals and creation of accurate models that realistically couple multiple domains. To address this knowledge gap, a team at the US Army Engineer Research and Development Center constructed a simplified, uniform levee to enable the measurement of signals that had passed through undisturbed boundaries. Sensor types were medium-specific, with microphones in the air, hydrophones in the water, and accelerometers in the soil. Using electric bridge wire detonators (EBW’s), impulsive signals were generated in each medium type and measured on sensors in all three media. This presentation begins with an overview of the experimental design, discusses the medium-specific measurement results, and concludes with a discussion of joint multi-domain data analysis results. Approved for public release: distribution is unlimited.

Segmentation of anatomical layers and imaging artifacts in intravascular polarization sensitive optical coherence tomography using attending physician and boundary cardinality losses.

Intravascular ultrasound and optical coherence tomography are widely available for assessing coronary stenoses and provide critical information to optimize percutaneous coronary intervention. Intravascular polarization-sensitive optical coherence tomography (PS-OCT) measures the polarization state of the light scattered by the vessel wall in addition to conventional cross-sectional images of subsurface microstructure. This affords reconstruction of tissue polarization properties and reveals improved contrast between the layers of the vessel wall along with insight into collagen and smooth muscle content. Here, we propose a convolutional neural network model, optimized using two new loss terms (Boundary Cardinality and Attending Physician), that takes advantage of the additional polarization contrast and classifies the lumen, intima, and media layers in addition to guidewire and plaque shadows. Our model segments the media boundaries through fibrotic plaques and continues to estimate the outer media boundary behind shadows of lipid-rich plaques. We demonstrate that our multi-class classification model outperforms existing methods that exclusively use conventional OCT data, predominantly segment the lumen, and consider subsurface layers at most in regions of minimal disease. Segmentation of all anatomical layers throughout diseased vessels may facilitate stent sizing and will enable automated characterization of plaque polarization properties for investigation of the natural history and significance of coronary atheromas.

Эффекты отрицательного преломления волн в металлических фотонных кристаллах

The paper considers the interaction of optical radiation with the boundaries of media formed by two-dimensionally periodic systems of well-conducting cylindrical elements of small cross-section – metal photonic crystals. It is shown that at band gap frequencies in the spectrum of the crystal's own electromagnetic states when waves propagate obliquely relative to the elements, such structures can be characterized by hyperbolic isofrequency diagrams in the space of wave vectors. A consequence of this is the possibility of negative refraction effects occurring when waves are incident on the boundary of such an anisotropic hyperbolic medium formed by a two-dimensional crystal with elements of limited length. The problem of incidence of a plane-wave Gaussian optical beam on the surface of a metal photonic crystal is solved using the finite-difference method in the time domain. It has been proven that negative refraction of waves occurs under certain conditions at the boundary of the medium formed by such a crystal.

Sketch in the contemporary social-communication space: development trends

Introduction. The contemporary stage of mass media development is marked by a change in the genre system. One of the genres that has almost disappeared from traditional media, but actively reacted to the emergence of the network space and became part of it, is undergoing transformational processes, is the sketch. Relevance and goal. Understanding the trends in the development of sketches at the current stage is relevant, as it provides an opportunity to look at the place and role of this genre in the social and communication space in a new way. The purpose of the study is to outline the trends in the functioning of the sketch genre in the contemporary social and communication space. Methodology. The research used the methods of scientific literature analysis, analysis and synthesis, typological analysis, and systematization. The chosen methods made it possible to find out the general features of the development of the sketch genre in the Ukrainian social and communication space. Results. A survey of traditional media showed that today the sketch is almost not presented in them. However, this genre has not completely disappeared, it cannot be classified as marginal. Currently, the sketch is undergoing a process of revival and transformation, reflecting those processes that are characteristic of the contemporary period of development of media activity – the era of post-journalism. Social networks have become a successful platform for its implementation, where this genre acquires a new genre dimension. The most optimal way to realize the genre “status” of a sketch is Facebook – a social communication platform that provides for small-format posts, an active authorial position, which is characteristic of the genre we are considering. The sketch adapts to the conditions of network discourse, so its genre model also changes: the presentation style is simplified, the visual component is strengthened, etc. The communicative approach to writing is also changing: from the genre of a professional sketch, it is transformed into a genre of amateur journalism. Network sketches became the catalyst of a new socio-communication phenomenon – network literature (virtual literature, Internet literature). Sketches “outgrow” the boundaries of social media and find a literary embodiment in individual publications. The modern media space is characterized by the functioning of both traditional types of sketches and the latest forms. Conclusions. Sketches are becoming more and more in demand in the modern social and communication space. This genre adapted to the requirements of the “network” discourse and became an integral part of it.

Exploring uses and gratifications of podcasts among young arab audiences

This study analyzes podcast consumption patterns among young audiences in the United Arab Emirates, exploring the motivations and engagement of Emirati youth with this burgeoning media form. Utilizing a survey of 400 young participants, this research examines the various gratifications of podcasts, including entertainment, information acquisition, and community interaction. It assesses the use and impact of podcasts across different genres. The findings indicate that podcasts entertain, educate, and foster personal growth among listeners, who appreciate the medium's ability to allow multitasking and its accessibility for content creation. The study extends existing literature on media consumption in the Arab region, particularly among the youth and within the technologically advanced societies of the Gulf. It highlights the dynamic and interactive nature of podcasting that transcends traditional media boundaries, providing a platform for audio-visual content integration and audience feedback.

The Determination of Mediating Effect of Market Orientation and User-Generated Content in Using Social Media Features for Knowledge Sharing

The goal of this research is to study the mediating role of market orientation and user-generated content in the correlation between user-friendliness, security, and communication features pertaining to social media and knowledge sharing. The purpose of this study is to elucidate the prevailing online businesses in Sri Lanka about how to customize their businesses through knowledge sharing. The study is conducted with a vision to enrich online businesses with the involvement of support from market orientation and user-generated content, which is facilitated through social media platforms. A sample of 112 online businesses operating on the social media platform was selected using random sampling techniques for this research study. A structured Google form was adapted to collect data. The results of the study elaborate that market orientation does not have a significant mediating impact on the relationship between user-friendly features and knowledge sharing, while user-generated content mediates the relationship between all social media features and knowledge sharing. The highest mediating effect of user-generated content is evident for the communication feature. Based on the research outcomes, it is recommended for online businesses to encourage customers to review their businesses to ameliorate the functioning of their businesses through knowledge sharing. It is also recommended to improve business operations within social media boundaries to make them more user-friendly to expedite knowledge sharing. Furthermore, it is also recommended to bolster screening mechanisms for social media business operations to restrict unauthorized access and encourage the protection of sensitive data for the business.

New Difference Schemes for Impedance Boundary Conditions of Wide-Angle Shift-Map PE

New impedance boundary conditions (IBC) difference schemes are proposed for wide-angle shift-map PE. A simple experiment is set up to check the accuracy of the PE. We explain the drawbacks of original boundary conditions (BCs) difference schemes. Some problems are caused by the PEC boundary. We use one-sided difference schemes for the BCs as substitutes. The proposed schemes not only meet the physical property but also perform well in numerical calculation. The numerical experiments are done on PEC and media boundaries to study the characteristic of the new BCs. The reflection calculated by PE are compared with Fresnel reflection. The numerical analysis reveals that the new BCs scheme errors are smaller than those of the original BCs. The new 1st-order PE is accuracy for the slope up to 14° with the reflection angle offset being less than 0.5°, where a horizontally spreading, 0.5° beamwidth levy source illuminates the slope. Under the same condition, the 2nd-order Claerbout PE is accurate when the slope is less than 16° and the 2nd-order Greene PE is accurate when the slope is less than 19°. In addition, the ripples caused by the 2nd-order PE with new BCs is smaller than the original one.

Reconstruction of point events in liquid-scintillator detectors subjected to total internal reflection

The outer water buffer is an economic option to shield the external radiative backgrounds for liquid-scintillator neutrino detectors. Since the refractive index of the liquid scintillator is larger than that of water, the consequential total internal reflection of scintillation light at the media boundary introduces extra complexity to the detector optics. This paper develops a precise detector-response model by investigating how total internal reflection complicates photon propagation and degrades reconstruction. We first parameterize the detector response by regression, providing an unbiased energy and vertex reconstruction in the total internal reflection region while keeping the number of parameters under control. From the experience of event degeneracy at the Jinping prototype, we identify the root cause as the multimodality in the reconstruction likelihood function, determined by the refractive index of the buffer, detector scale and PMT coverage. To avoid multimodality, we propose a straightforward criterion based on the expected photo-electron-count ratios between neighboring PMTs. The criterion will be valuable for the success in future liquid-scintillator detectors by guaranteeing the effectiveness of event reconstruction.