Effective Medium Research Articles

Social media communication and public engagement in different health crisis stages: The framing of COVID-19 in Chinese official media

Effective government social media communication plays a crucial role in mitigating public panic amid various public health crises, such as the H1N1 pandemic, the Ebola epidemic, the Zika epidemic, and the ongoing COVID-19 pandemic. A research gap exists in investigating government official social media communication strategies and effects on public engagement at specific COVID-19 crisis stages. This study examines the COVID-19 communication strategies the Chinese government used and the corresponding effects on public engagement at different COVID-19 crisis stages on social media. The Crisis and Emergency Risk Communication Model, Framing Theory, and Situational Crisis Communication Theory are combined to develop a conceptual framework. Content analysis and coding were performed on two dimensions: health content theme (four sub-dimensions) and transparent communication style (three sub-dimensions). Public engagement was measured by the number of shares, comments, and likes. The results indicate a strong need for disease prevention information at the initial event/maintenance and resolution stages, while reassurance and government actions are highly valued at the resolution stage. Interactive features promote public engagement in key crisis stages.

Implementation of e-Government via Lapak Aduan Banyumas

The purpose of this writing is to assess the community participation in Kabupaten Banyumas in utilizing E-Government media, analyze the supportive and inhibiting factors in the implementation of E-Government, and evaluate the efforts made by the Kabupaten Banyumas Government in overcoming these challenges. This qualitative research involves a literature review. The research process includes gathering primary and secondary literature sources, data processing, citation extraction, and abstraction to present research findings. Interpreting these findings generates comprehensive information, leading to knowledge acquisition for conclusive insights. The results of the discussed research reveal that Lapak Aduan Banyumas is an effective and efficient communication medium between the community and local government through social media, enhancing community participation in politics. Besides, uneven network infrastructure, particularly inadequate transmission towers and fiber optic cables in the hilly areas of Kabupaten Banyumas, results in unsatisfactory website-based service delivery.

Removal Efficiency of Bottom Ash and Sand Mixtures as Filter Layers for Fine Particulate Matter.

Permeable pavement is a technology that allows rainwater to infiltrate into the pavement. Permeable pavements not only help reduce surface runoff by allowing rainwater to infiltrate into the pavement, but also improve water quality with the filter layer that removes particulate matter pollutants. This study evaluated the particulate matter removal efficiency of bottom ash-sand mixtures as filter layers for removing fine (≤10 μm) or ultrafine (≤2.5 μm) particulate matter in the laboratory. Five filter media were tested: silica sand, bottom ash, and bottom ash-sand mixtures with 30:70, 50:50, and 70:30 ratios. The mixed filters exhibited more consistent and stable particulate matter removal efficiency over time than either the uniform sand or bottom ash filter. The 50:50 bottom ash-sand mixture demonstrated removal rates of 58.05% for 1.8 μm particles, 93.92% for 10 μm particles, and 92.45% for 60 μm particles. These findings highlight the potential of bottom ash-sand mixtures as effective filter media for removing PM10 road dust, although field validation with actual pavement systems is necessary.

Metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultrawideband

The field of terahertz devices is important in terahertz technology. However, most of the current devices have limited functionality and poor performance. To improve device performance and achieve multifunctionality, we designed a terahertz device based on a combination of VO2 and metamaterials. This device can be tuned using the phase-transition characteristics of VO2, which is included in the triple-layer structure of the device, along with SiO2 and Au. The terahertz device exhibits various advantageous features, including broadband coverage, high absorption capability, dynamic tunability, simple structural design, polarization insensitivity, and incident-angle insensitivity. The simulation results showed that by controlling the temperature, the terahertz device achieved a thermal modulation range of spectral absorption from 0 to 0.99. At 313 K, the device exhibited complete reflection of terahertz waves. As the temperature increased, the absorption rate also increased. When the temperature reached 353 K, the device absorption rate exceeded 97.7% in the range of 5–8.55 THz. This study used the effective medium theory to elucidate the correlation between conductivity and temperature during the phase transition of VO2. Simultaneously, the variation in device performance was further elucidated by analyzing and depicting the intensity distribution of the electric field on the device surface at different temperatures. Furthermore, the impact of various structural parameters on device performance was examined, offering valuable insights and suggestions for selecting suitable parameter values in real-world applications. These characteristics render the device highly promising for applications in stealth technology, energy harvesting, modulation, and other related fields, thus showcasing its significant potential.

A review of ultrasound contrast media

Efforts have been made over the last five decades to create effective ultrasonic contrast media (UCM) for cardiac and noncardiac applications. The initial UCM was established in the 1980s, following publications from the 1960s that detailed the discovery of ultrasonic contrast enhancement using small gaseous bubbles in echocardiographic examinations. An optimal contrast agent for echography should possess the following characteristics: non-toxicity, suitability for intravenous injection, ability to traverse pulmonary, cardiac, and capillary circulations, and stability for recirculation. Definity, Optison, Sonazoid, and SonoVue are examples of current commercial contrast media. These contrast media have shown potential for various clinical reasons, both on-label and off-label. Several possible UCMs have been developed or are in progress. Advancements in comprehending the physical, chemical, and biological characteristics of microbubbles have significantly improved the visualization of tumor blood vessels, the identification of areas with reduced blood supply, and the enhanced detection of narrowed blood vessels. Innovative advances are expected to enhance future applications such as ultrasonic molecular imaging and therapeutic utilization of microbubbles.

Energetics and electronic structure of Janus WSSe formation by continuous chalcogen substitutions

We investigated the energetics and the electronic structure of Janus WSSe when formed by continuous sulfurization and selenization of WSe2 and WS2, respectively, using density functional theory combined with the effective screening medium method. The total energy of WS2−x Se x is sensitive to the stoichiometry. The total energy increases monotonically as the substitutional surface selenization of WS2 increases. The sulfurization of WSe2 causes complex energetics with respect to the number of S atoms involved. Competition between the energy cost of polarization and the energy gain through S–W bond formation produces the compound WS0.445Se1.445, which is a metastable structure that gives the local minimum in the energy landscape. The electronic structures of the partially substituted structures are interpolated smoothly from those of Janus WS2 and WSe2.

Rancang Bangun Media Pembelajaran Interaktif pada Mata Pelajaran Desain Grafis

. Design and Development of Interactive Learning Media in Graphic Design Subjects is a research that aims to develop effective and practical interactive learning media on basic graphic design topics. This research uses the ADDIE development model, which consists of five development stages: analysis, design, development, implementation, and evaluation.At the analysis stage, this research understands the problems found in the use of learning media in graphic design subjects, such as the limited use of print media and the need for more interactive and interesting media. At the design stage, this research develops a learning media design that involves multimedia elements such as text, images, graphics, sound, video, animation and comprehensive simulations. At the development stage, this research develops multimedia-based interactive learning media, which can provide certain forms of interaction that allow users to interact actively with the program. The research results show that the Basic Graphic Design interactive learning media developed is valid from the instructional and display aspects, and is practical and suitable for use for basic graphic design learning. Thus, this research contributes to the development of interactive learning media that is effective and practical in improving the quality of learning in graphic design subjects.

Peran Komunikasi Efektif Dalam Membangun Hubungan Guru-Anak Usia Dini Yang Bermakna

Effective communication between teachers and early childhood children plays an important role in forming significant and meaningful relationships. In this article, the author discusses the role of effective communication in building meaningful teacher-early childhood relationships. This research uses a qualitative approach with case study methods and analysis of symbolic interaction theory. The research results show that effective communication between teachers and young children requires the characteristics of teachers who are patient, willing to make sacrifices, attentive, firm, and able to attract the attention of young children. In addition, teachers must understand the diverse characters of their students and use effective media to achieve meaningful communication. Thus, effective communication can help in developing early childhood social skills, improving the quality of intrapersonal relationships, and avoiding conflict. Therefore, it is important to stimulate effective communication in children from an early age to build meaningful relationships between teachers and young children.

Analysis of microwave heating of copper powder compacts

The influence of the native oxide films, which is essential for the understanding of the microwave heating of metal powder, is analyzed numerically based on the experimental data on temperature, dilatation and resistance of compacted copper powder samples. The indicative thickness of the oxide films, determined from the resistivity data using an effective medium approximation, is shown to decrease from ≥1 μm to below 1 nm. The effective complex dielectric permittivity and magnetic permeability of the copper powder with oxide films on the particles are calculated within the recently developed models. The dielectric permittivity exhibits a percolation behavior in the temperature range of the oxide decomposition, viz. 210–250 °C when microwave heating is carried out in nitrogen and 330–375 °C – in argon. The efficiency of absorption of the incident 30 GHz microwave radiation in a slab of powder is assessed separately for the electric and magnetic-type losses, the contribution of the latter being predominant until the percolation transition. The energy flux density of the incident microwave radiation required to sustain the prescribed heating rate is shown to increase during the microwave heating process from ∼20 W/cm2 to >1 kW/cm2 due to increasing reflection. The additional microwave energy input required for the completion of the endothermic oxide decomposition reaction is shown to be significant at the initial stage of the process (below 200 °C).

P‐260: Late‐News Poster: Doping Ratio Control of Organic Composite Layer in OELDs by Spectroscopic Ellipsometry

The OLEDs industry needs a reliable nondestructive process control method for measuring the correct thickness of layers and estimation of doping or mixing ratio. Using spectroscopic ellipsometry, we applied for thickness and doping ratio monitoring for emission layer (EML) and mixed electron transport layer (mETL) grown on glass by evaporator. Optical properties of EML host and dopant, mETL host and mixing material have been investigated. We present the effect of doping on optical constants dispersions of EML and mETL layers in the photon energy range 1.2 to 5.0 eV. We adopted the Effective Medium Theory (EMT) to monitoring mixing ratio and dispersion equation to monitoring doping ratio. In result developed monitoring tool can measure imperceptible difference doping ratio.

A developed convolutional neural network model for accurately and stably predicting effective thermal conductivity of gradient porous ceramic materials

Accurate and stable prediction of the effective thermal conductivity (ETC) of porous ceramic materials is of great significance for their application in areas such as optimizing the design of thermal barrier coatings and improving energy conversion efficiency. Porous ceramic materials exhibit complex porous structures with gradient porosity distributions that pose a great challenge for effective medium theory (EMT) and conventional convolutional neural networks (CNN) in attempting to accurately and stably predict the ETC of porous media. In this study, a CNN model that integrates self-attention and a multiscale feature-fusion mechanism is proposed to predict the ETC of porous media with greater accuracy and stability. The integration of the self-attention and multiscale feature-fusion mechanisms enhances the CNN's ability to learn long-range dependencies and preserve detailed information. The optimization of the CNN's accuracy and stability is visually illustrated using gradient-weighted class activation mapping (Grad-CAM) for ETC. Additionally, by employing the proposed gradient quartet structure generation set (QSGS), a gradient porous ceramic media dataset comprising 10 000 images was built to train the CNN model. Finally, the prediction results and relative error distribution of the ETC were compared across different models. Our model demonstrated improvements in statistical metrics, including a 33.7 % decrease in mean error, 25.2 % decrease in median error, and 59.6 % decrease in maximum error. The decreases in these metrics and Grad-CAM for the ETC strongly demonstrates that the model proposed in this work greatly improved the accuracy and stability of predicting the ETC of ceramic materials with gradient porosity distributions.

A compact quad-square negative-index metamaterial: Design, simulation, and experimental validation for microwave applications

This research provides a detailed explanation of the design, simulation, and experimental of quad-square metamaterial-based negative-index unit cells for S-band applications. The Computer Simulation Technology 2022 licensee version was utilized to design and obtain numerical results for the unit cell. The proposed unit cell for the metamaterial has dimensions of 5 × 5 × 1.57 mm3. The substrate chosen was FR-4, resulting in a substantial effective medium ratio value of 19.07. A series of systematic parametric studies were conducted to optimize the quad square metamaterial structure. Key parameters, such as substrate types, unit cell arrays, thicknesses of substrate, and split gaps, were varied to determine their impact on the structure. The validated equivalent circuit result was compared to the simulated results, showing a significant agreement. The demonstrated correlation between simulation and experimental data highlights the dependability of the proposed quad-square metamaterial, positioning it as a viable option for a range of electromagnetic applications, such as communication systems, sensors, and imaging devices.

Planetarium pedagogy and technical learning experience: an investigation from instructional perspectives

The research focused on the National Planetarium Kuala Lumpur’s education programs, investigating the types and target audiences. It examined the educational theories and strategies used, including multiple intelligence theory and cooperative learning. The study also explored the alignment of astrophysics in Pearson Edexcel International General Certificate of Secondary Education (IGCSE) Physics with the Planetarium’s programs. Document analysis and participant observation were employed. The results revealed two program types: on-site and online. The programs showed alignment with IGCSE Physics and utilized theories like social cognitive theory. The National Planetarium positively impacted students through multi-intelligence theory, sociocultural theory, experiential theory, and constructivism. Gamification and group activities enhanced the learning experience. The Planetarium’s ability to simulate astronomical events made it an effective medium for instructional science institutions. Overall, the study highlighted the diverse education programs of the National Planetarium Kuala Lumpur, their alignment with IGCSE Physics, and their positive impact on students’ personal, physical, and social contexts.

Modeling of periodical shearing flow in a fibrous space with applications in shear-induced brain injury

This paper presents a theoretical model examining the interaction between a fibrous network and viscous fluid flow driven by an oscillating boundary. The aim is to understand how oscillating impacts are transmitted from the skull, through the arachnoid trabeculae network filled with cerebrospinal fluid, as observed in shaken baby syndrome. The model uses an effective medium approach to determine the fluid velocity field while each fiber is treated as a soft string undergoing deformation. Results indicate that the frequency of oscillation, fiber stiffness, and porous structure resistance significantly influence the oscillating shearing flow, as indicated by the Womersley (Wo), Brinkman (α), and Bingham (Bm) numbers. Application of the model to shaken baby syndrome suggests that oscillations in the cerebrospinal fluid and arachnoid trabeculae can significantly surpass those on the skull, leading to intense shear stress penetration to the brain. This model is the first study to integrate the dynamic response of string-like fibrous networks in fluid flows with oscillating boundaries and offers a quantitative framework for predicting the transmission of shearing forces from the skull to the brain matter.

Effectiveness of Social Media-Based Intervention in Intention Change of Adolescents for Promoting Sexual Health Behavior in Western Terai of Nepal.

Sexually transmitted infections (STIs) in adolescents are among the major public health challenges that have to be prevented in time. Traditional education falls short of reach; social media offers accessible ways. However, there is no research on such an issue in Nepal. Accordingly, this study was conducted to assess the effectiveness of a social media-based health education intervention in changing the intention of promoting sexual health among adolescents in Nepal. Study Design: A quasi-experimental study. A total of 160 adolescent students aged 14-19 years old from four purposively selected schools were evenly divided into intervention and non-intervention groups. Sampling and data collection were performed between May and June 2023. Data were collected through self-administered questionnaires for pretest and posttest evaluation. The intervention was delivered and followed up through a Facebook Messenger group. The obtained data were managed and analyzed using SPSS 21, with a significance level of 5%. Social media-based health education interventions played a significant role in promoting the sexual health behavior of adolescents. The adolescents' knowledge and attitude scores on STIs increased from 2.33 to 4.62 and from 21.87 to 26.30. In addition, their scores on subjective norms, perceived behavioral control, and intentions in promoting sexual behavior increased from 13.93 to 17.59, from 19.96 to 25.40, and from 13.07 to 18.06, respectively, which were statistically significant. The utilization of social media platforms such as Facebook Messenger groups is an effective medium for delivering health educational messages. Hence, increasing social media-based health education is a cost-effective intervention for promoting the health and sexual behaviors of adolescents.

Two-scale finite element simulations for UT inspection of micro-structured materials in CIVA

Ultrasonic testing (UT) of highly heterogeneous structures is an important issue for many industrial applications in civil engineering for concrete inspection as well as in nuclear and oil & gas, where it applies to cast steels and weld joints. In these materials, performance is limited by the phenomenon of multiple wave scattering at the microstructure scale. In this context, the use of effective simulation tools is particularly useful both for improving interpretation of UT and for optimizing or demonstrating the performance of inspections. However, the scales of heterogeneity to be taken into account are often smaller than fractions of a tenth of a wavelength. In 3D simulations, it is therefore difficult, if not impossible, to combine computational performances with the refinement of the modelled interactions. To meet this challenge, CEA is developing an original approach based on two applications of the finite element (FE) method implemented in CIVA. The first application uses micro-scale heterogeneous material data on small representative elemental volumes (REVs) to feed a second code dedicated to macro-scale with effective medium characteristic. This second code relies on a high-order finite element model that is very efficient at the scale of the inspected industrial component. In this communication we present the main features of these FE tools and illustrate their performances on different application cases for welded parts and concrete

Exploring the digital footprint: Social media use among hematology oncology fellowship programs in the U.S.

9048 Background: Social media platforms have emerged as pivotal tools for communication, outreach, and engagement. This study aims to assess the adoption and utilization of social media among Accreditation Council for Graduate Medical Education (ACGME) accredited Hematology Oncology (HO) fellowship programs, examining the correlation between program characteristics and social media presence. Methods: A comprehensive review was conducted of all ACGME-accredited HO fellowship programs to identify their presence on popular social media platforms, Twitter/X and Instagram. Collected metrics included the presence of official accounts, the date of creation, and follower counts as of February 2023. Additional details such as university affiliation, program size, and geographic location were also gathered to understand their influence on social media usage. Results: Out of 183 programs, 54 programs (29.5%) were found to be using Twitter, while 21 programs (11.5%) had an Instagram presence. Of these, 9 programs (4.9%) had a dual presence. Regional analysis revealed that the East North Central region had the highest Twitter/X presence, with 14 programs (25.9%), while on Instagram, the Pacific region led with 5 programs (23.8%). A significant association was observed between program type (university vs. community) and Twitter/X use. Programs with a higher number of fellowship positions (four or more) were more likely to use social media. In the period post-2021, approximately 20 programs adopted Twitter, and 15 began using Instagram. Descriptive statistics, including median values and interquartile ranges for posts, followers, and accounts followed, along with verification percentages, are detailed in the accompanying table. Conclusions: The use of social media within HO fellowship programs is a strategic tool for increasing program visibility and engaging with the next generation of medical professionals. The findings highlight a predominant use of social media in larger, possibly more resource-endowed programs, and suggest that these platforms may be an effective medium for recruitment in a digital age. This study emphasizes the significance of social media in the contemporary recruitment landscape and lays the groundwork for future research on its impact on program attractiveness and applicant selection processes in the medical field. [Table: see text]

Study of KOH as alkali for enhancing performance of photo-galvanic cell in transparent cylindrical cell design

Photo-galvanic cells are liquid electrolyte-based dye-sensitized solar cells. Chemically, the dye/pigment photo-sensitizer, reductant, surfactant, and alkali materials are the main fabrication components of these cells. Most dye/pigment materials are more soluble and stable at high pH. The pH of Potassium hydroxide (an alkali of plant nutrient ‘potassium’ element) is very high. Therefore, Potassium hydroxide is supposed to be the best eco-friendly and effective alkali medium for photogalvanics. As far as alkali is concerned, NaOH has been exploited extensively in photo-galvanics. Although, the NaOH-based photo-galvanics show good electrical output, it is plagued with some drawbacks like shorter shelf life, high cost, unsafe for skin, low conductivity, low water solubility, etc. Therefore, in the present research, the KOH has been exploited as an alkali material for harvesting solar energy using the Sunset Yellow FCF dye sensitizer-Ascorbic acid reductant-CTAB surfactant cylindrical cell designed photo-galvanic system.In the present study, the observed optimum cell performance is as follows-open-circuit potential 777 mV, maximum current 25000 μA, short-circuit current 5600 μA, power 733.6 μW, fill factor 0.16, and efficiency is 19.77 % at pH 14.30. The Sunset Yellow FCF dye shows very high photostability and photo-absorption with KOH alkali. The power storage capacity is sufficiently robust, as the cell is capable of supplying power at its ∼36.16 % capacity after a very long time of 24 h. The KOH-Sunset Yellow FCF dye sensitizer-Ascorbic acid reductant-CTAB surfactant photo-galvanics in the present study show improved results over the reported results for the NaOH-Sunset Yellow FCF dye sensitizer-Ascorbic acid reductant-CTAB surfactant photo-galvanics. The reasons for the good photo-galvanics with KOH alkali may be attributed to some peculiar chemical and physical properties of KOH vis-à-vis the chemical and physical properties of NaOH.

Mengoptimalkan Promosi yang Efektif untuk Penerimaan Siswa Baru Sekolah Kuncup Melati di Semarang

Kuncup Melati School consists of Kindergarten, Elementary School and Junior High School is one of the private schools located in the middle of the city which is quite strategic and very easy to access and in a densely populated area. In addition to being in a strategic and densely populated location, this school is a private school that does not charge any fees to its students. Funded by a Khong Kauw Hwee Foundation.Every year like other private schools, it opens registration opportunities, but even though the school is free, there are not many students, especially the community in the school environment, the school already has social media which is a means of information and promotion of activities and activities from the school, but registrants who enter this school sometimes do not meet the quota provided by the school. On this occasion, the Community Service Team will carry out activities with the theme of optimizing effective promotional media that can help achieve the target of students who register at Kuncup Melati School. , namely with promotional activities other than social media can be done with other media. The hope is that with this promotional optimization activity, it can increase public interest in entering school at Kuncup Melati.

The “The benefits of wordwall games for teaching and learning Mandarin language

This article aims to discuss the application of the benefits of the worldwall game as an innovative learning alternative for Mandarin language subjects. In the digital era, the integration of technology in learning is becoming increasingly important to increase student engagement and learning outcomes. One tool that stands out in the context of learning Mandarin is wordwall, a game-based learning platform that provides various interactive activities. This article aims to explain and evaluate the benefits of using wordwalls in the context of Chinese language teaching and learning. The implementation of online learning is still experiencing problems, especially students' enthusiasm for learning has decreased. To overcome this obstacle, one interesting way to increase student enthusiasm for learning is to use the wordwall game. This wordwall game is an online learning media (E-Learning) which has game, quiz, discussion and survey features. This research examines the wordwall game which has the benefit of being an effective learning medium to increase students' mastery and motivation in learning Mandarin online. Quantitative research with an experimental approach, with a pre-test and post-test design with a control group and an experimental group. Population took 60 students taking MKU Mandarin courses, divided into 2 groups, namely the control group and the experimental group. Data collection for this research used a language mastery test instrument to measure the ability of four aspects of language, namely listening, speaking, reading and writing. To measure the level of student motivation, a questionnaire technique using Google Forms was used. The independent variable is the use of the wordwall game as a learning medium. Mastery of Mandarin and student motivation are the dependent variables. The results of research on learning with wordwall make the learning process easy, fun and can help students understand Mandarin. Apart from that, learning by applying playing techniques using wordwall games is very appropriate for beginner Mandarin learners.