bluuebunny/crossref_metadata_2025 huggingface dataset:
Researchon fuzzy evaluation of waste logistics system in industrial park based on BP neural network
Authors: He Kailun , Bao Xiuli , Liu Zhixue
Published: June 2024

According to the design principle of evaluation index, combined with the requirements of system operation efficiency and benefit, the development of eco city and eco industrial park, this paper puts forward the evaluation index system of waste logistics system in the park with 22 secondary indexes from the five aspects of system input, system capacity, operation efficiency, treatment efficiency and environmental performance, reasonably determines the index weight by using analytic hierarchy process, and selects 12 industrial parks as the object for example analysis, and use the proposed index system to carry out fuzzy evaluation and obtain the input and evaluation results of fuzzy evaluation. Then, according to the fuzzy evaluation process, build a three-layer BP neural network, train the BP network with the input and output of fuzzy evaluation, and obtain the BP network that can perform fuzzy evaluation. The example analysis shows that: the evaluation results of BP network for each park are the same as those of fuzzy evaluation. It is a convenient, reliable and effective scientific tool to evaluate the performance of waste logistics system in the park.
Urban ecology and planning: A necessary convergence
Authors: Angeoletto Fabio , Fellowes Mark D.E. , Essi Liliana , Santos Jeater W.M.C. , Johann Juciane M. , Leandro Deleon Da Silva , Mendonça Nathalia Moraes
Published: June 2024

The global large-scale urbanization of the territory is one of the most important ecological phenomena today. The standards used in urban growth are crucial to the protection of biodiversity and affect the provision of a reasonable quality of life for the urban population. Contrary to the views of many biologists and other scholars, cities are barren environments. Contrary to nature, urban ecology, as a necessary interdisciplinary science, recent developments show that cities are heterotrophic ecosystems, which need to be planned in a way to reduce their impact on the biosphere and improve their ability to maintain biodiversity.
Research on the path of Foshan ecological livable city construction—Based on resident satisfaction survey
Authors: Wu Cairong , Xuan Deming , Chen Junjie , Liang Jiahao , Li Shiqiang , Kong Jiehui
Published: June 2024

Eco-livable city is a word that has been frequently seen in major media in recent years and has become the construction goal of many cities at home and abroad. At present, most of the construction of ecological cities or livable cities is based on objective indicators and rarely considers the important subjective indicator of residents’ satisfaction. Using the questionnaire survey method, from the perspective of residents’ satisfaction, the path of building an ecologically livable city in Foshan is discussed, the weak links in Foshan’s ecologically livable construction are obtained, and the priority development path of Foshan’s ecologically livable city construction is proposed. Foshan’s urban planners and builders provide some references, and hope to provide references for the ecological livability construction of cities similar to Foshan.
Research on evaluation of ecological livable city based on residents’ satisfaction—Take Zhuzhou as an example
Authors: Tan Shujia
Published: June 2024

Build an evaluation index system for an ecologically livable city, investigate the ecological livable level of Zhuzhou City from the perspective of residents’ satisfaction, study the influencing factors of residents’ satisfaction by using exploratory factor analysis, analysis of variance and correlation analysis, and calculate the ecological livable level of Zhuzhou City and its four main urban areas. The research results show that: (1) The satisfaction evaluation of ecological livability in Zhuzhou City is mainly composed of four-dimensional factors: urban participation, human settlements, urban security, and human settlements economy, and the impact effect shows a decreasing trend. (2) There are significant differences in the satisfaction evaluation of various factors in terms of residents’ age, educational background, and length of residence, and there is a significant negative correlation between residents’ sense of belonging and satisfaction. (3) The overall satisfaction level of ecological livability in Zhuzhou is general. Among the four main urban areas, Lushong District has the highest satisfaction score, and Hetang District has the lowest score. On this basis, put forward targeted policy suggestions to improve the ecological livability of Zhuzhou City.
A Review on the Influence of Medium and Trace Elements on the Quality of Agricultural Products
Authors: Wang Luyao , Sun Wen
Published: June 2024

In recent years, soil salinization has become a serious problem in the global environment. The application of organic fertilizer to improve saline-alkali soil has been widely concerned because of its advantages of improving soil fertility, improving soil structure and improving soil salt ion composition. This paper reviews the mechanism of saline-alkali soil improvement, and expounds the improvement prospect of organic fertilizer on saline-alkali soil from the influence of organic fertilizer on soil physical and chemical properties, water and salt transport law, crop yield and quality, in order to provide theoretical guidance for saline-alkali soil restoration.
Study on the Removal Effect of 3DEPs on Microplastics in Groundwater and Desalination Mechanism
Authors: He Xi , Zhi Yaze , Wang Hao
Published: June 2024

Owing to water scarcity, groundwater quality has become an important constraint on sustainable regional development, especially in coastal areas. Coastal groundwater is subject to natural conditions and intense human activities, and the evolution of water quality is extremely complex, with the possibility of seawater intrusion into the groundwater, leading to the salinisation of freshwater aquifers. At present, the commonly used methods for removing groundwater pollution include coagulation, adsorption, biological method, membrane technology, etc., among which the coagulation method is more commonly used. At present, three-dimensional electrode electrochemical technology is widely used in high salinity organic wastewater and many organic wastewaters, but there are few studies related to microplastic removal by three-dimensional electrode electrochemical technology using metallic aluminium particles as particle electrodes. The treatment of microplastics in coastal groundwater is a relatively novel issue, and with the increasing application of three-dimensional electrochemical technology in the study of desalination, the three-dimensional electrode electrochemical technology will be promising due to the high salinity of coastal groundwater, the increasingly serious pollution of microplastics, and the fluctuation of water quality and quantity.
Effective Situated Learning in Junior High School English Teaching and Learning
Authors: Li Jingwen
Published: June 2024

Learning situation refers to the atmosphere of teaching activities created by teachers in the course of teaching (Wang Yanrong, 2023). The creation and presentation of learning situations can help overcome the defects of pure cognitive activities and make learning a comprehensive activity including emotional experience, which has important positive significance for improving the learning effect. When creating situations in English learning, teachers should make sure the enjoyment, reality, complexity and typicality of the learning situation. Here is an example about situated learning in Junior High School English teaching.
Design and Implementation of an Intelligent Campus Second-hand Trading Platform based on Microservices and Cloud Computing
Authors: Zhong Xiaolei , Yao Ru , Qiao Rui , Ding Hongwei , Zong Rong
Published: June 2024

With the rapid development of smart campuses, traditional campus second-hand trading methods can no longer meet the growing needs of students. This paper proposes a design scheme for an intelligent campus second-hand trading platform based on microservices and cloud computing, which provides customized trading experience for users by introducing advanced recommendation algorithms. The microservice architecture gives the platform extremely high module decoupling and autonomous scalability, ensuring the high availability and agile response of the system. The recommendation system uses a hybrid algorithm, combining content filtering and collaborative filtering, and continuously optimizes the recommendation results through machine learning, so as to accurately capture user preferences. One of the features of the platform is its community-driven data feedback mechanism, which not only can adjust the recommendation strategy in real-time but also can promote the sustainable development of campus economy and culture through data mining. In addition, the research explores a novel credit evaluation system design to establish a trustworthy trading environment. The experimental results show the technical innovation and high efficiency of the platform in multiple dimensions, which is significantly superior to the existing solutions. The successful implementation of this research indicates that the campus trading platform is moving towards a more intelligent and personalized direction, and is expected to play a key role in the smart campus ecosystem.
Application Study of Task-based Approach in Middle School English Writing Teaching
Authors: Li Jiali
Published: June 2024

As is known to all, with the further development of economic globalization, foreign language teaching plays an increasingly important role in China's education.In recent years, as a result of China's new curriculum reform, researchers continue to explore the comprehensive learning methods, many new teaching methods with the times came into being.This paper mainly wants to discuss whether Task-based Approach really has practically helped for English writing, whether it can mobilize students' enthusiasm for writing, whether it pays attention to the cultivation of students' comprehensive quality, and how to carry out Task-based Approach better and more smoothly in middle schools.In order to better ensure the authenticity of this paper, the author of the paper will use questionnaire survey and experimental methods to demonstrate.Through the research, the author of the paper understands that Task-Based Approach is developed on the basis of communicative teaching method, and its practical application in English classroom provides a good example for us.However, in the past, China's English teaching did not pay attention to the cultivation of students' comprehensive ability, but only paid attention to a certain aspect of English learning, and paid less attention to writing. Students are afraid to write English compositions, lack of practical writing materials, unable to mobilize the knowledge learned, write out vividly.After the study of Task-based Approach, students can improve their writing ability and stimulate their interest in writing to some extent.After this study, the author of the paper hopes to give some ideas and inspiration to teachers who want to use Task-based Approach in writing teaching in the future. At the same time, in view of the shortcomings in the research, it is hoped that teachers can continue to reflect and summarize, and continue to conduct in-depth research.
Research Progress of Chromophoric Dissolved Organic Matter (CDOM) in Landfill Leachate by Electrochemical Method
Authors: Shi Lifeng , Zhang Siao , Wang Hao
Published: June 2024

Over the years, industry, agriculture and other human activities have discharged large amounts of organic pollutants into landfills. Among them, color-resistant dissolved organic pollutants have attracted great attention. In order to achieve the safe discharge of wastewater, a variety of treatment technologies have been used to effectively eliminate CDOM in water. In this paper, the most promising electrochemical oxidation (EO) techniques are reviewed, their basic principles are introduced, and the research progress and application status of electrode materials and electrochemical reactors are introduced. At the same time, the substance composition and detection method of CDOM are discussed. Finally, the performance of EO technology to remove CDOM is summarized. However, we should note that electrode optimization has always been the core of EO technology improvement, and the combination of updated electrode material iteration and treatment process has broad prospects for the wide application of EO technology.
A Review of Research on Error Correction in English in College Entrance Examination in China from 2013-2022
Authors: He Xiao
Published: June 2024

Error correction in English is the constructional question type of the compulsory English test in the college entrance examination, including modification, addition and deletion, and the content involves morphology, grammar and syntax. In this paper, from two aspects of research methods and research content, quantitative and qualitative analysis methods are used to review the research papers on essay error correction in CNKI academic journals. The results show that the research method is single and the research tool is simple. In terms of research content, there are some defects in the depth and breadth of domestic essay error correction research, the proportion of introduction and problem-solving skills is too large, and the proportion of empirical research is insufficient, which needs to be expanded in depth. Finally, combined with the latest development of foreign error correction research, the development direction of the research is prospected from the aspects of research content, level and research methods, and some suggestions and references are provided for future related research.
Research on the Application of Embedded Real-time Software in Computer Software Design
Authors: Huang Sheng
Published: June 2024

With the continuous development of computer technology, embedded real-time software is also developing and improving. In the design of computer software, embedded real-time software is the core part, and its reasonable application can effectively improve the function and performance of computer software and ensure its stable and reliable operation. At the same time, embedded real-time software can effectively realize the real-time operation of computers and bring convenience to people's daily life and work. This paper deeply studies the application of embedded real-time software in computer software design. The key technologies and methods such as real-time operating system, real-time task scheduling algorithm, embedded software design mode and embedded software testing and verification method are discussed in detail. Combined with specific cases, the application practice of embedded real-time software in computer software design is analyzed, including real-time requirements analysis, performance optimization, resource management and application in specific fields. This paper analyzes the specific application of embedded real-time software in computer software design, and provides some reference for related workers.
Simulation Study of Thermal Performance on the Inner and Outer Surfaces of Semi-Transparent Photovoltaic (STPV) Glass with Different Transparency
Authors: Zhu Yihuan , Luo Daina , Yu Guoqing
Published: June 2024

This paper used the experimentally verified one-dimensional steady-state heat transfer numerical model of the semi-transparent photovoltaic (STPV) glass to simulate the influence of wind speed, ambient temperature and air gap thickness on the surface temperature of PV modules, and analyzed the thermal performance of the inner and outer surfaces of STPV glazing with different transparency. Results shows that for every 1m/s increase in wind speed, the outer surface temperatures of SL-STPV glass with transparency of 10%, DL-STPV glass with transparency of 20% and 40% decreased by 3 °C, 3.02 °C and 2.22 °C, respectively. For every 10 °C increase in ambient temperature, the outer surface temperatures of SL-STPV glass with transparency of 10%, DL-STPV glass with transparency of 20% and 40% increase by 8.45 °C, 7.6 °C, and 7.79 °C, respectively. For the DL-STPV glass with transparency of 20% and 40%, for every 2 mm increase in the thickness of the air gap, the outer surface temperature increases by 0.13 °C and 0.12 °C, respectively. The heat transfer between the inner surface of the glass and the indoor environment increases the heat gain through the glass into the room in summer, which will lead to an increase in refrigeration energy consumption. However, in winter, the heat exchange between the inner surface and the in-door air to heat the indoor air reduces the heating energy consumption to a certain extent, and achieves the effect of building energy conservation to a certain extent.
OS DIREITOS HUMANOS E A UTILIZAÇÃO DE INTELIGÊNCIA ARTIFICIAL NOS PROCESSOS MIGRATÓRIOS INTERNACIONAIS
Authors: Krummenauer Gustavo Becker
Published: June 2024

O presente artigo pretende abordar sobre efetivação dos direitos humanos diante da crescente utilização de ferramentas de inteligência artificial na gestão da migração pelos Estados Nacionais. Para isso, o artigo debate sobre perspectivas históricas, sociológicas e jurídicas da digitalização do mundo, da inteligência artificial e dos direitos humanos na migração internacional. Após, é apresentada uma pesquisa bibliográfica de artigos científicos em inglês feita na plataforma CAPES, utilizando os descritivos “artificial intelligence” AND migration AND “human rights”, que tratam sobre os riscos aos direitos humanos na utilização de programas de inteligência artificial pelos Estados Nacionais na gestão das migrações internacionais. Foram utilizados o método indutivo e a técnica de pesquisa bibliográfica. O artigo conclui pela importância e atualidade do tema, sendo imprescindível considerar os migrantes inseridos na formação da solução de sistemas aplicáveis à gestão de migração e não como simples objetos desses sistemas, garantido os princípios de direitos humanos em todas as fases de manejo da inteligência artificial (ethics by design).
Studi Literature Perlindungan Hukum Bagi Pasien BPJS Dalam Pelayanan Kesehatan Di Rumah Sakit
Authors: Fitria Adinda Dwi , Salwa Fadillah , Khairani Khovifah , Ujung Sofia Rahma , Purba Sri Hajijah
Published: June 2024

Program Jaminan Kesehatan Nasional (JKN) sangat bermanfaat bagi masyarakat Indonesia, khususnya yang menderita. Namun penerapannya tidak lepas dari banyak faktor, antara lain perbedaan fungsional antara pasien BPJS dan non-BPJS. Terdapat perbedaan antara berbagai rumah sakit, termasuk RSUD, dalam pelayanan yang diberikan kepada pasien BPJS dan non-BPJS. Pasien BPJS mempunyai masa rawat inap yang lebih singkat, ruang kamar yang lebih sedikit, dan masa pengobatan yang lebih lama. Terkadang sikap dan respon petugas kesehatan terhadap pasien BPJS buruk. Tujuan dari penelitian ini adalah untuk meninjau literatur tentang “Dukungan hukum pasien BPJS di rumah sakit”. Metode yang digunakan dalam penulisan artikel ini adalah pendekatan kajian pustaka. Penelitian sastra, disebut juga penelitian sastra, adalah pengumpulan data dari sumber-sumber kepustakaan dan penelitian sejarah. Penelitian ini menggunakan data yang disajikan atau tersedia, bukan data lapangan atau saksi mata kejadian dan menggunakan data sekunder. Faktor yang menghambat pasien mengetahui haknya antara lain kurangnya informasi rumah sakit, tidak dibayarnya biaya pengobatan oleh BPJS, dan tidak dipatuhinya peraturan rumah sakit. Upaya BPJS Kesehatan untuk menjamin hak-hak peserta BPJS Kesehatan mencakup pegawai masing-masing rumah sakit yang terlibat langsung di fasilitas BPJS Kesehatan. Perlindungan hukum antara pasien reguler dan pasien BPJS memastikan bahwa kedua pasien berhak mengakses dan menerima pelayanan kesehatan yang baik dan aman. Namun pasien BPJS harus membayar dan mengikuti sistem rujukan. Penyelenggaraan perlindungan hukum terhadap pasien yang masuk JKN-KIS tercermin dari terlaksananya hak pasien untuk mendapatkan pelayanan kesehatan di rumah sakit dan mematuhi peraturan perundang-undangan.
Impact of COVID-19 pandemic on routine childhood vaccinations
Authors: Lv Shi-Rong , Wang Ming-Ke , Yu Xue-Lu , Li Xin-Yue , Yang Ji-Shun
Published: June 2024

Routine pediatric vaccination is one of the most effective public health inter-ventions for the control of a number of fatal diseases. However, during the coronavirus disease 2019 pandemic, routine pediatric vaccination rates were severely affected by disruptions of health services and vaccine confidence issues. Governments and the United Nations have taken measures to re-establish routine pediatric vaccination, while additional efforts are needed to catch up and develop plans to ensure routine vaccination services for the future pandemics.
Exploring the impact of rotavirus vaccination on antibiotic prescription and resistance: A comprehensive systematic review
Authors: Simhachalam Kutikuppala Lakshmi Venkata , Cozma Matei-Alexandru , Maddineni Gautam , Chorya Harshal Prakash , Tummala Nayanika , Godugu Swathi , Chintala Jyothi Swaroop , Găman Mihnea-Alexandru
Published: June 2024

BACKGROUND

Rotavirus is a highly contagious virus responsible for a significant burden of acute gastroenteritis, particularly among infants and young children worldwide, however, vaccination against this viral agent is available. Several studies have hypothesized that rotavirus vaccination has been linked to lower rates of antibiotic resistance.

AIM

To assess the relationship between rotavirus vaccination and antibiotic resistance.

METHODS

The present systematic review was tailored based on the Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines. Several electronic databases (PubMed/MEDLINE, Scopus and Web of Science) were searched independently by two investigators in order to retrieve relevant publications published until April 2023 that investigated the aforementioned research question.

RESULTS

The comprehensive database search identified a total of 91 records. After the duplicates were removed (n = 75), we screened the titles and abstracts of 16 potentially eligible publications. After the irrelevant records were excluded (n = 5), we screened the full texts of 11 manuscripts. Finally, 5 studies were entered into the qualitative and quantitative analysis.

CONCLUSION

In conclusion, all the studies support the idea that vaccinations can reduce the need for antibiotic prescriptions which could potentially contribute to mitigating antibiotic resistance. However, to fully comprehend the mechanisms of antibiotic resistance, enhance treatment guidelines, and consider diverse demographic situations, further research is necessary to use evidence-based strategies to fight antibiotic misuse and resistance.
Leadership and Integrity: the Citadels for Constitutionalism in Kenya
Authors: Kwenjera Peter
Published: June 2024

Chapter 6 of the Constitution of Kenya, 2010 provides for the modicum of constitutionalism that state officers ought to espouse in exercising public authority. Kenya has a robust legal and institutional framework that is mandated to implement the provisions of Chapter 6 of the 2010 Constitution in remedying historical accounts of corruption among state officials. This article appraises the strides made and the notable roadblocks faced since the promulgation of the 2010 Constitution. In doing so, it primarily employs a doctrinal research methodology analysis. It is argued that an obscured definition of leadership and integrity and insufficient institutional capacity have slowed down the implementation of Chapter 6. This article proposes minimum statutory penalties, a harmonised understanding of the standards of integrity to be attained and the security of tenure of offices such as special magistrates.
Linguistic Challenges of Interoperable Registers in the Context of E-Government Services
Authors: Láncos Petra Lea
Published: June 2024

E-administration requires, among others, interoperability between registers kept by authorities. Databases hold data clustered around concepts stemming from the different legal acts governing the procedures of the various authorities. Owing to the conceptual and terminological incoherence pervasive throughout legal acts, the intended interoperability between databases and registers will fail. This paper sheds light on the need for a conceptual consolidation in applicable national law on the example of registers kept by Hungarian authorities and the legislation governing them.
Statistical Analysis Of Bubble Parameters From A Model Bubble Column With And Without Countercurrent Flow
Authors: Kováts P. , Zähringer K.
Published: June 2024

Bubble columns are widely used in numerous industrial processes, because of their advantages in operation, design and maintenance compared to other multiphase reactor types. In contrast to their simple design, the generated flow conditions inside a bubble column reactor are quite complex, especially in continuous mode with counter-current liquid flow. For the design and optimization of such reactors precise numerical simulations and modelling is needed. These simulations and models have to be validated with experimental data. For this reason experiments were carried out in a laboratory-scale bubble column with shadow imaging technique with and without countercurrent liquid flow. In the experiments two types of gases –relatively badly soluble air and good soluble CO2 – are applied and the bubbles were generated with three different capillary diameters. With changing gas and liquid flow rates overall 108 different flow conditions were investigated. The gathered data has been statistically evaluated over the whole 1 m measurement area and bubble parameters have been obtained such as bubble diameter, velocity, aspect ratio, bubble motion direction and inclination. The analysis of these parameters shows, that the countercurrent liquid flow has a noticeable influence on the bubble parameters, especially on the bubble velocity and motion direction. In the case of CO 2 bubbles remarkable bubble shrinkage has been observed at counter-current liquid flow due to the enhanced mass transfer. The comprehensive and extensive bubble data obtained in this study will now be used as a source for the validation of numerical simulations and models.
Three-Dimensional Detection Of A Gas-Liquid Interface By Means Of Oblique Colored Light Sources
Authors: Dreisbach M. , Blessing S. , Michaux F. , Brunn A. , Stroh A. , Kriegseis J.
Published: June 2024

The present work introduces an extension of the shadowgraphy method by differently colored oblique light sources for the observation of the three-dimensional dynamics during drop impingement. The wetting of a flat or structured surface by an impinging droplet is relevant for many technical processes and therefore a further understanding of the drop impact dynamics is essential for an optimization of these processes. The most widely used optical measurement technique for drop impact experiments is the shadowgraphy method, which produces a clear two-dimensional representation of the gas-liquid interface. However, drop impact dynamics – especially on structured surfaces – are inherently three-dimensional. Therefore, two lateral light sources are introduced, in order to produce glare points on the gas-liquid interface that reveal additional three-dimensional information of the droplet shape. Narrow-banded LEDs with distinct spectra and maxima in the visible light illuminate the droplet from different angles in red, green and blue light, respectively, while a high-speed RGB-camera captures the images produced by each light source in the corresponding image channel, therefore creating three unique views of the droplet. Thereby the shadowgraphy image resulting from the blue backlight illumination is recorded in the blue image channel, while the glare points from the green and red lateral light sources are captured in the accordingly remaining channels. In order to compensate for the mutual perturbation of the images resulting from cross-talk between the channels and the polychromatic light of the LEDs, a color correction is introduced, which is based on the transfer function between the light sources and the channels of the RGB-camera. The transfer function is determined by a spectral integration over the power distribution of the individual light sources and sensitivities of the single camera channels likewise, with the assumptions of fully specular reflection and that the spectral distribution of the reflected light equals the incoming light. In experiments with the proposed measurement setup of a water droplet impinging on a flat substrate it is successfully demonstrated, that three unique and independent grayscale images can be reconstructed with this color correction function, which successfully removes the mutual perturbations. The presented method is a pure addition to the shadowgraphy method, as it produces a clear shadowgraphy image and optionally provides two further unique views by glare points on the gas-liquid interface within a single RGB-camera setup.
Multiple Optical Characterization Of A Solid/Liquid Material
Authors: Davin T. , Gobin C. , Lefebvre F. , Godard G. , Ménard T. , Varea E. , Danaila L.
Published: June 2024

Various industrial configurations use Phase Change Materials (PCM) for thermal management. Their use generates complex flows that must be studied and characterized to better understand the phase-change mechanisms and to help model development. In particular, the works considering large containers where turbulent effects are encountered are poorly addressed in the literature. The present study proposes the experimental analysis of PCM flows with a simultaneous flow and energetic characterization. Heat and mass transfer are analyzed in a large (0.4 meter) cubic volume undergoing various lateral temperature conditions. 2-dimensional fields of velocities by a Particle Image Velocimetry (PIV) technique and temperature by thermocouples (TC) scanning and by Background-Oriented Schlieren (BOS) are measured. The measurement methodology highlights the local transfer as reflected by the Nusselt number for the two latter techniques. The local Nusselt numbers are also integrated and compared to a global Nusselt assessed by the heat transfer through the hot wall regulating system. In this study, the different techniques with their theoretical approaches and the experimental setup are described. The conditions and the conducted procedure of the tests are detailed. The results of local measurements for two particular temperature configurations are given. The global heat transfer and the global Nusselt number are also provided as a function of the Rayleigh number and the solid fraction. The results and the techniques are discussed. The results corresponding to various Rayleigh numbers form a database that is used to understand phenomena in large PCM containers and validate numerical models involving melting phenomena.
Applications Of Thermographic Particle Image Velocimetry To Film Cooling Flow Experiments In A Closed Loop Wind Tunnel
Authors: Abram C. , Sander T. , Straußwald M. , Zigan L. , Pfitzner M.
Published: June 2024

A laser-imaging method based on thermographic phosphor tracer particles (thermographic particle image velocimetry) is used to simultaneously measure temperature and velocity fields in film cooling flows in wind tunnels, in order to compare novel film cooling configurations under conditions of realistic mainstream turbulence. Several important experimental factors that affect the measurement precision, accuracy, and ultimately the success of the technique in its application in these practical environments are identified: (1) the choice of phosphor particles, which affects the inherent temperature sensitivity and flow tracing accuracy; (2) the particle seeding and management of particle deposition, which affects control of the overall particle number density and seeding uniformity and temporal stability; (3) the setup of the excitation laser/detection cameras and the wind tunnel geometry, which influences background interference from deposited particles and potential influence of multiple scattering. This paper discusses these three factors, gathering and adding to information in prior journal publications, to provide guidance and future research directions for experimental researchers wishing to use these optical diagnostics in film cooling studies and similar enclosed geometries.
Rainbow-Color Imaging Of Microbubbles Strongly Clustering In A Turbulent Boundary Layer
Authors: Murai Y. , Saitoh D. , Park H. J. , Tasaka Y.
Published: June 2024

Rainbow-color volumetric illumination for visualizing 3D microbubble distributions was examined in order to find microbubble clustering in a spatially developing turbulent boundary layer. The color coding was defined according to the wall unit from 0 to 200, straddling viscous-sub layer, buffer layer and log-law region. This allowed understanding where the microbubbles were accumulated or diffused within the boundary layer. The results showed microbubble clouding in the low-speed streak regions along the viscous sublayer, clustering into cores of streamwise vortices ejected into the buffer layer, and intermittent exhaust of the clusters toward the log-law region. Furthermore, correlation of these behaviors with local Reynolds shear stress event (ejection, sweep) was found with quadrant analysis of the liquid velocity vector data obtained by PIV.
Influence Of Span-Wise Coherence In A Cylinder Wake On The Acoustic Radiations
Authors: Siegel L. , He G. , Mulleners K. , Henning A.
Published: June 2024

In the present work the influence of the spanwise coherence of the flow structures on the acoustic emission in the case of cylinder wakes is investigated. For this purpose, the correlation between pressure fluctuations in the far field and velocity fluctuations in the wake of the cylinders of different shapes is determined experimentally by means of the so called causality correlation. 2D-2C as well as 2D-3C PIV is applied to determine the velocity fluctuations. The pressure fluctuations in the far field are measured synchronously with microphones. From the temporal and spatial distribution of the correlation results, conclusions are drawn about the dependence between the coherence of the vortex structures convecting downstream of the cylinder and the tonal components in the acoustic signature. Most interestingly, in case of a tapered cylinder geometry the temporal evolution of the correlation function shows an asymmetry, which has not been observed in previous results.
Unsteady Multi-Parameter Flow Diagnostics By Filtered Rayleigh Scattering: System Design By Multi-Objective Optimisation
Authors: Doll U. , Röhle I. , Dues M.
Published: June 2024

The measurement of the time-resolved three-component (3C) velocity field together with scalar flow quantities such as temperature or pressure by laser-optical diagnostics is a challenging task. Current approaches typically employ combinations of different methods relying on tracer particles or molecules, which requires elaborate calibration procedures of the tracer's photo-physical properties and extensive instrumentation. In contrast to this, the tracer-free filtered Rayleigh scattering (FRS) technique has been proven to obtain combined time-averaged velocity and scalar fields and might offer a viable alternative for unsteady flow diagnostics. By applying multiple perspective views, two detection system variants are presented, combining 1) six observation branches with one camera/molecular filter and 2) four camera views with two cameras and molecular filters of differing vapour densities. Both configurations in principle allow for the simultaneous measurement of instantaneous 3C velocity, temperature and pressure fields. Multi-objective optimisation is used to enhance the detection setups for different sets of experimental configurations. It is shown that a higher number of observation positions and the associated dynamics of the FRS signal prove to be advantageous compared to the use of less views in combination with two acquisition channels equipped with different molecular filters. It is also demonstrated that the use of linearly polarised laser light is preferred over circular polarisation. Future work will focus on the realisation of the multiple-view FRS concept for the combined measurement of 3C velocity and scalar fields.
Simultaneous Measurements Of 3D Temperature And Velocity Fields In Gas Flows Using Thermographic Phosphor Tracer Particles
Authors: Stelter M. , Martins F. J. W. A. , Beyrau F. , Fond B.
Published: June 2024

A concept for joined three-dimensional temperature and velocity measurements in turbulent gas flows using sub-micron sized thermographic phosphor tracer particles is presented. Such measurements are needed to resolve flow structures commonly encountered in turbulent flows of scientific and industrial interest. While available techniques for simultaneous 3D thermometry and velocimetry are suitable for microfluidic applications or slow liquid flows, the present concept is applicable to macroscopic turbulent gas flows. The feasibility of these measurements is demonstrated using two turbulent heated gas jets. The concept utilizes two sub-systems: a four-view 3D particle tracking velocimetry system combined with a two-view ratiometric phosphor thermometry system. A double-pulse green laser and a single-pulse UV laser are used for illumination and excitation of phosphor luminescence, respectively. Upon imaging the particle-laden flow using the joined camera system, 3D particle positions and velocities are computed from four double-frame Mie-scattering recordings, while the temperature is inferred from two single-frame luminescence-emission recordings. Measurement results using low particle seeding densities successfully retrieve the expected temperature and velocity distributions. This proof-of-concept is a first step towards the ability of resolving 3D turbulent flow structures from individual single-shot recordings using higher particle seeding densities.
An Action Research on Incorporating Multimodal Composing to Facilitate Student Engagement in Continuation Writing Tasks in Chinese High School EFL Teaching
Authors: Tian Shiyun , Deng Yi
Published: June 2024

Recently, multimodal composing has become a popular topic in current research on English writing teaching in China. Existing research has rarely delved into student engagement in multimodal composing in Chinese high school English teaching systematically. To address this gap, this study used a mixed-method approach and introduces multimodal composing to investigate its impact on high school students' engagement in English story continuation writing tasks. Findings show that the incorporation of multimodal elements significantly amplifies students' engagement across affective, behavioral, cognitive, and social dimensions. However, students’ excessive focus on the graphic elements within multimodal compositions may have a negative impact on the narrative quality. While affirming the positive role of multimodal composing on student engagement, the study also identified the challenges in applying multimodal composing in the Chinese education context, providing insights for future research and pedagogical implementations.
The Impact of Sustainable Investing on Financial Performance
Authors: Barakat Hanan Amin , Hossam Nadine , Tarek Nour , Mohamed Sara , Emad Jana
Published: June 2024

This research project investigates the impact of sustainable investing on financial performance within the Egyptian market, focusing on a selected group of twelve companies listed on the Egyptian Exchange (EGX) that meet predetermined environmental, social, and governance (ESG) criteria. The study addresses the gap in the existing literature by examining the specific relationship between sustainable investment and financial performance in the Egyptian context, within the period of 2018 to 2022. Regression models employed to examine the statistical association between sustainable investment practices and financial performance indicators, while correlation analysis helps to identify the strength and direction of the relationship. Revenue Growth and Total Debt to Equity were used as control variables. The main results of the research project state that there is an impact of sustainable investment on some financial performance of the Egyptian companies listed in ESG index. Study results show that there is no significant relationship between ESG factors and some indicators like current ratio, cash ratio, operating cash flow, debt ratio, turnover ratio, gross margin ratio, Tobin Q, and assets growth. However, it showed that there is a positive correlation between corporate social responsibilities (CSR) or ESG factors and financial performance measures like return on assets (ROA), return on equity (ROE), and return on sales (ROS).
The Dilemma and Solution of Juvenile Delinquency – Reflection on the Murder of a 13-year-old Boy in China
Authors: Liu Yanjun , Sun Jianan
Published: June 2024

On March 10, 2024, a 13-year-old junior high school student in Handan City, Hebei Province, China was killed and buried by three classmates under the age of 14. The method of committing the crime was cruel and had a negative social impact, once again bringing topics such as "juvenile delinquency" and "lowering the age of criminal responsibility" to the hot search. Since entering the new era, with the rapid development of the social economy, minors have shown an overall trend of "precocious puberty". The problem of juvenile delinquency and violence has also become increasingly severe, causing adverse social impacts. According to data released by the Supreme People's Procuratorate of China, juvenile delinquency in China is characterized by a sharp increase in the number of crimes, a clear trend towards younger age groups, and cruel criminal methods. The Eleventh Amendment to the Criminal Law, which came into effect in March 2021, lowered the age of criminal responsibility and individually lowered the statutory minimum age of criminal responsibility to 12 years old. Therefore, this case may become the first case to hold young minors accountable for crimes after the age of criminal responsibility has been lowered, which is of great significance to the construction of the rule of law and judicial practice. In practice, we should clarify the situation of "heinous circumstances" stipulated in the Amendment to the Criminal Law (XI), and establish an independent juvenile justice system to comprehensively and effectively correct and prevent the misconduct and illegal behavior of minors, rather than simply lowering the age of criminal responsibility. At the same time, reduce excessive interference of online public opinion in judicial trials.
Borate Application at Different Phenological Stages in Sunflower Cultivation
Authors: Silva Amanda Tavares da , Benett Cleiton Gredson Sabin , Marques Marina Gabriela , Martins Anne Silva , Silva Willian Gonzaga da , Arruda Natalia , Morais Yago Cesar Rodrigues , Benett Katiane Santiago Silva , Rodrigues Fabricio
Published: June 2024

Boron (B) is important for the nutrition and development of sunflower crops because of the damage that its deficiency can cause in plants, compromising the final crop productivity. This work aimed to evaluate the application of B doses at different phenological stages of the sunflower crop. The project was conducted in the experimental area of the Goiás State University, Campus of Ipameri, located in Ipameri-GO, in a randomized block design, arranged in a 2 x 5 x 6 factorial scheme, with four replications. The factors consisted of crop seasons (2017 and 2018), application at different phenological stages (V0, V6, V18, R1, and R3), and B doses (0, 1, 2, 3, 4, and 5 kg ha-1), respectively. In each crop season, leaf boron content, relative chlorophyll index, plant height, stem diameter, capitulum diameter, capitulum mass, number of achenes per capitulum, 1000-achene weight, and achene yield were assessed. The use of doses between 3.38 and 3.74 Kg ha-1 of B influenced the characteristics of leaf boron content, plant height, and 1000-achene weight. Most of the parameters assessed, including crop yield, were influenced by crop seasons due to rainfall distribution during the crop cycle. The 2017 off-season had the best results.
Clique number estimate based on coloring of the nodes
Authors: Szabó Sándor , Zavalnij Bogdán
Published: June 2024

We will describe an algorithm to establish an upper estimate of the clique number of a given graph. The procedure is based on greedy legal coloring of the nodes. In order to assess the performance of the procedure we carried out a large scale numerical experiment.
ETIKA DAN MORAL POLITIK DALAM PENEGAKAN HUKUM
Authors: Waha Hera Matildis Waha Hera , Abaenpah Mathilda Triani , Zalukhu Nehemia , Gunadi Genta Arief , Andini Tri
Published: June 2024

Kehidupan politik dan hukum di Indonesia selalu menjadi sorotan publik karena kompleksitasnya yang melibatkan berbagai faktor, termasuk etika dan moral politik serta penegakan hukum. Etika politik menyangkut prinsip-prinsip moral dan integritas yang menggerakkan tindakan politik, sedangkan penegakan hukum berkaitan dengan kepatuhan terhadap aturan dan keadilan dalam sistem hukum. Pergulatan antara etika politik dan penegakan hukum sering kali menjadi isu sensitif di Indonesia. Perubahan rezim pemerintahan, pergantian menteri, dan dinamika politik lainnya seringkali memunculkan pertanyaan tentang integritas moral dan etika politik yang menjadi landasan kebijakan publik. Penegakan hukum juga sering dipertanyakan akibat dugaan intervensi politik dan lemahnya integritas moral para penegak hukum. Artikel ini bertujuan untuk menguraikan dinamika antara etika politik dan penegakan hukum dalam konteks Indonesia, dengan merujuk pada literatur dan penelitian terkini yang relevan. Penelitian ini menggunakan pendekatan deskriptif-analitis dengan fokus pada pendekatan kualitatif untuk menggali pemahaman mendalam mengenai tantangan dan prospek yang dihadapi dalam upaya memperkuat sistem politik dan hukum yang berkeadilan di Indonesia.
EFEKTIVITAS PENGGUNAAN APLIKASI SINCAN DALAM PENILAIAN SINERGISITAS KINERJA KECAMATAN (SKK) DI KECAMATAN KALIWATES KABUPATEN JEMBER
Authors: Triyanti Nadea , Maulana Akbar
Published: June 2024

Penelitian ini bertujuan untuk menganalisa tentang efektivitas aplikasi SINCAN yang ada di dalam beberapa lembaga atau instansin pemerintahan di Indonesia, namun dalam hal ini yang menjadi titik perhatian penelitian adalah pada Lokasi penelitian yang terfokus di Kecamatan Kaliwates Kabupaten Jember. Efektivitas Aplikasi SINCAN yang diterapakan di Kantor Kecamatan Kaliwates akan dikorelasikan dengan Asas Umum Pemerintahan Yang Baik. Asas Umum Pemerintahan Yang Baik ini merupakan tolak ukur bagaiaman Aplikasi SINCAN ini dapat diakses oleh beberapa pihak, sehingga beberapa program atau kegiatan yang diselenggarakan oleh kecamatan menjadi sangat transparan.