bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Scalable Blockchain Storage Scheme for VANET
Authors: Wei Wenxiang , Zhu Nafei , Wang Jian , Song Hongyu , He Jingsha 
Published: August 2023

Abstract
Intelligent transportation systems (ITSs) make it possible for applications such as autonomous driving, active safety systems and smart cities. As the infrastructure of ITSs, vehicular ad-hoc network (VANET) plays a key role in ensuring traffic safety while improving driving experience and comfort. However, VANET faces many security and privacy challenges as the network is exposed to the public and involves sensitive information such as vehicle control commands and driving records. Although blockchain technology provides such features as decentralization, immutability, non-reliance on trust and traceability, most of the existing blockchain systems have high storage capacity and computing requirements for participating nodes while terminals nodes in VANET, such as road-side units (RSU), on-board units (OBU) and sensors, usually possess limited storage and computing capacity. To solve this problem, this paper proposes a lightweight blockchain system with scalable storage capacity for VANETs. It uses network sharding and multi-consensus strategy to improve the topology and consensus process of the blockchain. Aimed at reducing the storage overhead of RSU nodes that participate in the blockchain, a collaborative storage mechanism and a dynamic copy number strategy for the blockchain ledger is designed. Experimental analysis shows that compared to existing schemes, the proposed blockchain mechanisms can significantly reduce storage requirement for the participating nodes, making it possible for terminal nodes with limited storage in VANET to participate in the blockchain as fully functional nodes, avoiding the trend of blockchain network towards centralization, maximizing the sharing of road traffic information,which would ensure the security, privacy and trustworthiness of information in ITSs.
User Experience Oriented Edge Server Placement
Authors: Wang Shuliang , Liu Shuo , Yang Yijie , Yuan Hanning , Ruan Sijie , Yang Yun 
Published: August 2023

Abstract
Edge computing holds promising prospects and addresses certain limitations of cloud computing. In the realm of edge computing, service providers deploy edge servers in close proximity to users to minimize network latency. To optimize the utilization of limited edge servers, service providers typically adopt a decentralized approach to their placement. However, in real-world edge computing environments, runtime failures are bound to occur after the placement of edge servers, significantly degrading the user experience. Therefore, edge server placement strategies must consider scenarios involving edge server failures.In general, redundant placement techniques are employed to ensure the reliability of services deployed on edge servers. In practice, edge servers consist of one or more physical machines, which leads us to refer to the physical edge server placement as the PESP problem. From the perspective of mobile users, the PESP solution aims to provide cost-effective and stable services. We measure service stability using a robustness metric and, for the first time, introduce the average utility indicator to gauge service efficiency. Average utility pertains to the performance users obtain from edge servers, such as CPU performance. When placing edge servers, we take into account both average utility and robustness to ensure an optimal user experience.In this paper, we formally model the problem of user experience-oriented physical edge server placement (PESPU) and prove its NP-hardness. To tackle this problem, we propose an optimization method based on integer programming (PESPU-O) to find optimal solutions for small-scale problems. For large-scale problems, we present three heuristics to find solutions. Finally, we conduct experiments using real-world datasets to demonstrate the effectiveness and efficiency of our approaches.
Shape transitions of Red Blood Cell under oscillatory flows in microchannels
Authors: Akerkouch Lahcen , Le Trung 
Published: August 2023

Abstract

This paper aims to examine the ability to control Red Blood Cell (RBCs) dynamics and the associated extracellular flow patterns in microfluidic channels via oscillatory flows. Our computational approach employs a hybrid continuum-particle coupling, in which the cell membrane and cytosol fluid are modeled using the Dissipative Particle Dynamics (DPD) method. The blood plasma is modeled as an incompressible fluid via the Immersed Boundary Method (IBM). This coupling is novel because it provides an accurate description of RBC dynamics while the extracellular flow patterns around the RBCs are also captured in detail. Our coupling methodology is validated with available experimental and computational data in the literature and shows excellent agreement. We explore the controlling regimes by varying the shape of the oscillatory flow waveform at the channel inlet. Our simulation results show that a host of RBC morphological dynamics emerges depending on the channel geometry, the incoming flow waveform, and the RBC initial location. Complex dynamics of RBC are induced by the flow waveform. Our results show that the RBC shape is strongly dependent on its initial location. Our results suggest that the controlling of oscillatory flows can be used to induce specific morphological shapes of RBCs and the surrounding fluid patterns in bio-engineering applications.
The Philosophy of Social Reproduction in Modern Sport Globalization: A Barometric Analysis: Based on Barometric Analysis
Authors: Zhou Zhenhua , Hamid Ali Redar 
Published: August 2023

Abstract
There are so many people in so many places who take pleasure in so many different athletic pursuits, which is one marker of advanced human civilization, and also many fields of sports have contributed to the economic success of countries so that introduced culture to each other’s. As bibliometric analysis of technology coverage in HRM journals was performed to use Scopus database. The section on (Sport, Economic, Social Sciences, Business, Management, Accounting, Technology, Human Resource, Econometrics, Finance, and Humanities) just discusses key works connected to HRM technology. The resarch in which made use of the data-visualization software VOS viewer, analyzed the development of the over time, factoring in international cooperation and the frequency of certain keywords. The impact of the sports industry on the global economy and its role in attracting foreign visitors was then analyzed in depth. Finally, that sport is expanding at a rapid rate everywhere in the world, and it is widely recognized as a major economic driver for both individuals and nations.
Gravity Model Applied in External trade between Angola and SADC
Authors: Sandambi Nerhum 
Published: August 2023

Abstract
The paper analyses foreign trade between Angola and SADC in the period 2000- 2013. The main objective is to analyse the factors that influence foreign trade and, above all, to understand the main implications of this. A static gravity model was estimated using fixed effects (FE), random effects (RE) and ordinary least squares (OLS) models. Thus, the following results were obtained; the economic distance in the model is relevant and explains the foreign trade flows, with an impact of 0.978% on the volume of trade traded, the physical distance shows, however, a positive impact, it is plausible and justified by the reduced physical distance between Angola and the SADC member countries, "coeteris paribus". Trade Policy, through the Tariff variable, the results suggest an impact of 0.366% on the trade volume traded with member countries, keeping everything else constant, the FRONT dummy variable is relevant and explains the trade volume, being the trade made with the countries with which Angola shares the border, the impact is significantly higher, intuitively, the lower the costs related to the factors of attraction in the economy tend to be. Thus, the real effective exchange rate variable shows a negative impact, which translates into a decrease in trade volume, the impact may be related to volatility in the foreign exchange market.

JEL classification: c01; c21; c23; c33; F10
Post-COVID Conditions at the Delivery Hospitalization
Authors: Carlson Jeffrey M , Simeone Regina M , Wallace Bailey , Ellington Sascha , Saydah Sharon , Tong Van T 
Published: August 2023

Abstract
This study describes the frequency of post-COVID conditions and other co-occurring health outcomes at the delivery hospitalization. PCC diagnoses occurred in 0.02% of delivery hospitalizations and were more frequent in pregnant people who were White, had private health insurance, and delivered preterm.
Assessment of Drinking Water Quality of the People Living Around the Barishal District, Bangladesh.
Authors: MAMUN MD. AL , RAFID MD. IMTIAZ FARUK , SAZZAD GOLAM , MIAH RAKIB 
Published: August 2023

Abstract
Bangladesh is a densely populated country in South-East Asia. Increasing population along with increasing development activities lead to exploitation and pollution of water supplies readily available to us. Therefore, water quality indicators are imposed as a global problem to determine its suitability for individual uses as well as to establish major strategies for optimal use of water resources. Failure to ensure safe drinking water with efficient purification systems will leave communities vulnerable to waterborne outbreaks with harmful health conditions.
Evaluation of Hydrologic Data for Irrigation System Design:
A Case Study
Authors: Uche Uche E 
Published: August 2023

Abstract
The scope and the efficient operation of an irrigation system depends on systematic collection, collation, and analysis of the hydrological/meteorological data of the project area. Relying on existing rainfall records, the peak rainfall, mean rainfall, rainfall frequency and effective monthly rainfall were established. Atayi stream discharge characteristic curve was used to determine the stream stage-discharge relationship while the instantaneous rate of discharge of the stream was determined using float. The generated data was plotted on a hydrograph to obtain 2.64m3/s. The high-level volume discharge and the low-level flow per annum were found to be 29.08m3 and 18.33m3 respectively. For the crop evapotranspiration, the Penman open water evaporation was deployed using climatic data for Igwu scheme as collected by Umudike Research Institute, Umuahia to obtain 1871 mm per annum compared to 2200mm by Piche or Pan evaporation. The site hydrologic data collected and analyzed support the adequacy of basic hydrologic factors for irrigated paddy rice cultivation in the study area.
Pengembangan Buku Ajar Pengantar Dasar Matematika Berbasis Kitab Taqrib Dalam Meningkatkan Kemampuan Literasi Mahasiswa
Authors: Kholil Mohammad , Mukhlis Mohammad 
Published: August 2023

The purpose of this study is to develop a textbook for introductory mathematics based on the taqrib book to improve student literacy skills and find out the feasibility, practicality, and effectiveness of textbook for introductory mathematics based on the taqrib that has been developed. The type of research used is Research and Development (R&D) which is designed using the Borg and Gall development model. The subjects of the development product trial in this study were students of the class 2022 semester 1 of the MTK1, MTK2, and MTK3 classes of mathematics education study program at FTIK UIN KHAS Jember. This research produces a textbook of introduction to basic mathematics based on the taqrib book as students' reference book in lectures on basic introduction to mathematics in semester 1. The resulting textbook is validated by three validators with validation results without any revisions, so the textbooks developed are feasible for use. Furthermore, the resulting textbooks were tested on 1st-semester students of the mathematics education study program at FTIK UIN KHAS Jember. The results of this product trial were 84.49% with a practical category. The mathematical literacy ability of students in semester 1 of the Mathematics Education study program has increased from a total average score of 77.32 to 86.27. Based on these results, it can be said that the use of textbooks for introductory mathematics based on taqrib books is very effective in improving students' mathematical literacy skills.
Pengembangan E-LKPD untuk Meningkatkan Kemampuan Pemecahan Masalah Matematis Peserta Didik pada Materi Bangun Ruang Sisi Lengkung
Authors: Sarman Afriano Andri , Suastika I Ketut , Murniasih Tatik Retno 
Published: August 2023

This research aims to develop a valid, practical, and effective electronic student worksheet based on Liveworksheets that can enhance students’ mathematical problem-solving abilities. The indicator for these abilities include problem identification, procedure design, problem-solving, and conclusion drawing. The research and development of these electronic student worksheets have the benefit of providing interactive teaching materials for mathematics learning. The ADDIE development model was used in this research and development process. The research instruments include expert validations sheets, teacher and student response questionnaires were employed to measure practicality. The effectiveness of the electronic student worksheet was evaluated based on activity scores, response scores, and student test scores. The validity percentage of this electronic student worksheet was 78.67% for materials and 90% for media. The practicality of the electronic student electronic student worksheet was determined through the percentage of positive responses, with 96% from teacher and 84.33% from students. The average student activity score was 55.12, the response score was 45.06, and the student test score was 68.08. The electronic student worksheet developed in this study successfully enhanced students’ mathematical problem-solving abilities according to the predefined indicators.
Multi-wavelength Raman spectroscopy of natural nanostructured carbons
Authors: Isaenko Sergey , Shumilova Tatyana , Bocharov Vladimir , Ulyashev Vasily 
Published: August 2023

Abstract
There is an extensive range of carbon substances with poorly ordered structures that are not well understood. Yet they are important indicators of conditions of related geological processes. The carbon minerals include nanocrystalline graphite, natural analogs of glass-like carbon (GLC)—shungite and impact ultrahigh-pressure GLC, recently discovered ultranocrystalline diamond, as well as natural carbon nanocomposites of diamond, lonsdaleite, and graphite. Studying these natural carbon substances using a standard Raman approach with excitation by visible radiation may lead to a significant distortion of the understanding of their phase states. This paper presents in detail for the first time the spectral features of natural, poorly ordered, and multiphase sp2-sp3 carbon composites by multi-wave Raman spectroscopy using laser excitations from visible to ultraviolet light applied to natural low-ordered carbon substances—nanocrystalline graphite and shungite, nanocrystalline and ultranocrystalline diamond, and multiphase carbon aggregates. The carbon state resolution advantages of ultraviolet Raman spectroscopy for phase analysis of nanostructured and poorly ordered polycomponent carbon substances containing sp2- and sp3-carbons are presented. Raman spectroscopy with ultraviolet excitation can also be applied in the analysis of industrial carbon materials, such as glassy carbon and functional carbon nanocomposites, including ultranocrystalline diamond, lonsdaleite, and amorphous sp3-carbon components.
Relaciones euro-latinoamericanas: perspectivas sobre la consolidación de la cooperación comercial birregional
Authors: Insignares Cera Silvana , Rueda Fiorentino Mariangela 
Published: August 2023

El presente artículo analiza las relaciones euro-latinoamericanas con especial atención en el ámbito comercial a nivel CAN y Mercosur. Puntualmente, se orienta a responder a las siguientes preguntas: ¿cómo se materializa la cooperación comercial de la UE en los procesos de integración latinoamericanos CAN y Mercosur? ¿qué lecciones derivan de las dinámicas de asociación comercial entre estos bloques? Luego de revisar el papel de la UE como actor global y la importancia de su relacionamiento estratégico con AL, este trabajo sostiene que la relación comercial birregional se manifiesta en tres niveles de interacción: primer acercamiento, acción recíproca y consolidación. La naturaleza misma de las negociaciones, así como las disposiciones y decisiones internas de ambos procesos (CAN y Mercosur) habría favorecido en el caso de la CAN avanzar hacia la consolidación de las relaciones con la UE mientras que en el caso de Mercosur aún hay obstáculos por superar.
Palabras clave: Unión Europea; América Latina; Cooperación; CAN, Mercosur.
Análisis de la retórica en los títulos de los proyectos para el sostenimiento de la paz financiados por el Fondo de Naciones Unidas
Authors: Garay Vargas Javier Leonardo , Marin Aranguren Erli Margarita , León López Maira Alejandra 
Published: August 2023

Este artículo presenta un primer resultado del proyecto “evaluación de impacto de proyectos financiados por la cooperación internacional en organizaciones de la sociedad civil”, en el que se busca recolectar evidencia sobre la efectividad de la cooperación internacional. Aquí los hallazgos del análisis de texto de los proyectos que obtuvieron financiación del Fondo Multidonante para la Paz administrado por la Organización de Naciones Unidas, como evidencia sustancial de prácticas y hechos en este tipo de herramientas. Se interrelaciona el análisis cuantitativo con el cualitativo para un acercamiento desde el análisis de texto y la teoría de cambio en los títulos de los proyectos financiados y de esta manera se perfila no solo la estructura del fondo, sino las tendencias en materia de cooperación internacional, sus prioridades y preferencias, que se codifican en el estudio. De esta manera, la propia experiencia de investigación se convierte en el core del abordaje de estas temáticas que, en este caso, tienen una práctica única en el mundo. El artículo se divide en las siguientes partes: Primera, se da cuenta de un breve estado del arte y marco teórico utilizado para la realización de esta investigación. Segundo, se aborda la metodología de trabajo de la investigación. Tercero, se mencionan algunas características generales de los proyectos financiados por el Fondo. Luego, se muestran los hallazgos relacionados con los títulos. Al final, se proveen algunas conclusiones que sirven de guía para la continuación de la investigación
Palabras claves: cooperación internacional; sociedad civil; Naciones Unidas; análisis de discurso; paz
Optimal rehabilitation planning for aged water distribution mains considering cascading failures of interdependent infrastructure systems
Authors: Minaei Amin , Hajibabaei Mohsen , Savic Dragan , Creaco Enrico , Sitzenfrei Robert 
Published: August 2023

Abstract

Water distribution networks (WDNs) with other infrastructures constitute a complex and interdependent multi-utility system. Considering interdependencies between WDNs and other urban infrastructures, this work proposes WDN intervention planning using a dynamic multi-utility approach to tackle the challenges of pressure deficits and cascading failures by the decoupling of different infrastructure systems. For this purpose, the study develops reliability indices representing the hydraulic and decoupled statuses of WDNs with neighbor infrastructures; the hydraulic reliability represents the robustness of the network against the water pressure deficit, and decoupling reliability represents the extent to which WDN elements are decoupled from other assets elements. A multi-objective optimization algorithm is employed to develop rehabilitation strategies by introducing three approaches for WDN upgrade following a phased design and construction method. Evaluating intervention plans based on construction cost, reliability and cascade effects shows that, under budget limitation conditions, decoupling a WDN could significantly save the cascade cost such that 1% improvement in the decoupling reliability brings about 157.42 billion Rials cascade cost saving to asset managers. On the other hand, the decoupled network is weak against hydraulic reliability, which could make it by far less resilient network than the coupled network with around 75% hydraulic reliability difference.
Electrochemical degradation of ciprofloxacin through a DoE-driven optimization in a filter-press type reactor under batch recirculation mode
Authors: Peralta-Reyes Ever , Regalado-Méndez Alejandro , Chimeo-Sánchez Alexis A. , Robles-Gómez Edson E. , Natividad Reyna 
Published: August 2023

Abstract

In this work, the electrochemical degradation of ciprofloxacin (CIP) was studied in a filter-press-type reactor without division in a batch recirculation manner. For this purpose, two boron-doped diamond (BDD) electrodes (as cathode and anode) were employed. Also, the optimal operating conditions were found by response surface methodology (RSM) following a central composite face-centered design with three factors, namely current intensity (i), initial pH (pH0), and initial concentration ([C]0) with two responses, namely remotion efficiency (η) and operating cost. Optimal operating conditions were i = 3 A, pH0 = 8.49, and [C]0 = 33.26 mg L−1 within an electrolysis time of 5 h, leading to a maximum removal efficiency of 93.49% with a minimum operating cost of $0.013 USD L−1. Also, a TOC analysis shows an 80% of mineralization extent with an energy consumption of 5.11 kWh g−1 TOC. Furthermore, the CIP degradation progress was followed by mass spectrometry (LC/MS) and a degradation pathway is proposed.
Da questão técnica à ação comunicativa
Authors: Castro Jetur Lima de , Almeida Júnior Oswaldo Francisco de 
Published: August 2023

Discute a ação comunicativa como meio para reconstruir o entendimento da mediação da informação em relação à discussão da ideologia da técnica. Como método, apresenta uma pesquisa qualitativa baseada em uma pesquisa bibliográfica. A mediação da informação é entendida como um fenômeno emancipatório, analisado da base técnica ao saber-fazer, com uma perspectiva crítica da teoria da ação comunicativa. O estudo confirmou elementos para uma compreensão dialógica entre a técnica e a ação comunicativa, o que pode permitir uma orientação com base em pretensões de validade argumentativa para mediação de tarefas práticas. Considerar a crítica dos instrumentos da ideologia da técnica, para que os usuários não sejam condicionados a normas ou regras, sem uma representação da realidade social, onde as ideias estão dissociadas dos processos sociais.