bluuebunny/crossref_metadata_2025 huggingface dataset:
MONTERO CARO, M. D. (2023). Democracia en transición: una agenda para su regeneración. Madrid: Dykinson
Authors: Guichot Reina Emilio
Published: December 2023

Recensión de la obra MONTERO CARO, M. D. (2023). Democracia en transición: una agenda para su regeneración. Madrid: Dykinson.
GRAZIANI, C. (2023). Sicurezza e diritti in tempi di terrorismo internazionale. Tra endiadi e antitesi. Nápoles: Editoriale Scientifica
Authors: Sánchez Ferriz Remedio
Published: December 2023

Recensión de la obra GRAZIANI, C. (2023). Sicurezza e diritti in tempi di terrorismo internazionale. Tra endiadi e antitesi. Nápoles: Editoriale Scientifica.
El derecho de los parlamentarios a visitar las dependencias de la Administración
Authors: Ruiz Bursón Francisco Javier
Published: December 2023

Dentro de las facultades de control del ejecutivo, algunos reglamentos parlamentarios han reconocido el derecho de los diputados a visitar las dependencias de la Administración para verificar el funcionamiento del servicio público. La presente sentencia resuelve el conflicto planteado entre esta facultad de los parlamentarios y el límite a la misma, consistente en que con ello no se perturbe el normal desenvolvimiento de las tareas administrativas, con especial atención al papel que desempeña la Mesa de la Cámara en dicho procedimiento.
Índices de mortalidade materna entre os anos de 2016 a 2020: A partir da Pandemia por COVID-19 na Região Norte do Brasil
Authors: Moura Esther de Seixas , Santos Rayra Mesquita do , Desir Esther Anouse , Souza João Victor Oliveira de , Sales José Augusto de Melo , Teixeira Natália Andreza Silva , Franco Santino Carvalho
Published: December 2023

Em dezembro de 2019, iniciou na China a doença do SARS-CoV-2, em 2020 foi considerada pandemia pela Organização Mundial da Saúde. O sistema imunológico combate infecções como a COVID-19, contudo na gestação há um comportamento atípico da imunidade para manter o adequado desenvolvimento fetal, as gestantes integram o grupo de risco da COVID-19. O objetivo do presente estudo foi analisar os índices de mortalidade materna no contexto da Pandemia por SARS-CoV-2, na Região Norte brasileira. Trata-se de um estudo epidemiológico transversal, retrospectivo e analítico, acerca da mortalidade materna entre os anos de 2016 a 2020 e 2019 a 2020, no contexto de COVID-19 na Região Norte brasileira, usou-se dados da literatura em saúde e os casos notificados no Sistema de Informação de Agravos de Notificação. No período analisado, ocorreram 1211 óbitos maternos na Região, destacam-se os estados do Pará (49%) e Amazonas (26%), apesar das variações anuais, as proporções entre os estados pouco eram alteradas, a média entre os anos de 2016 a 2020. Observa-se um aumento de 133% de óbitos maternos indiretos no ano de 2020 em relação ao de 2019. De acordo com a análise do estudo, aumentou a taxa de mortalidade obstétrica em 2020, período inicial da pandemia, com destaque para os estados de Roraima e Amapá que obtiveram o maior aumento percentual, além disso os óbitos maternos por causas indiretas aumentaram indiretas em 2020 em relação aos anos anteriores analisados, atribuído à Pandemia.
Doença Hepática Gordurosa Não Alcoólica (DHGNA), caracterização, diagnóstico e tratamento
Authors: Queiroz Juciara Magdalena Flores , Bello Sergio Ricardo de Brito , Venturelli Amanda Caroline , Pazello Camila Tedeschi , Zarpellon Raquel Simone Maccarini , Souza Rosana Menezes de , Silva Roxane Wirschum
Published: December 2023

Introdução: A Doença Hepática Gordurosa Não Alcoólica (DHGNA) é caracterizada pelo acúmulo de gordura no fígado podendo evoluir para fibrose e alterações necroinflamatórias. Trata-se de uma patologia multifatorial e complexa associada a etnia, gênero, idade, condições metabólicas e endócrinas, intoxicação medicamentosa, entre outras. Objetivo: Diante dos agravos relacionados ao quadro, essa revisão narrativa teve como objetivo caracterizar a patologia, suas implicações, estratégias diagnósticas e principais condutas com ênfase a nutrição. Material e métodos: Para tanto, foram selecionados 44 artigos científicos publicados entre 2015 a 2023, nas principais bases de dados: Lilacs, Pubmed, Scielo e Google Acadêmico. Resultados e discussão:  A DHGNA está diretamente associada a resistência insulínica e obesidade. Apesar da biópsia ser considerada o padrão ouro no diagnóstico da doença, a investigação bioquímica e exame de imagem são utilizados mais frequentemente. Conclusão: O tratamento da DHGNA está pautado em modificações no estilo de vida, considerando-se incentivo a prática de atividade física, melhoria no aspecto qualitativo e quantitativo da dieta e inclusão de fitoquímicos e compostos bioativos na rotina alimentar do paciente.
Doença renal crônica secundária a síndrome hemolítico-urêmica atípica em paciente pediátrico: Relato de caso
Authors: Santin Thailla Moreira , Borges Yasmin Fidelis , Ferra Neto Oreste Angelo
Published: December 2023

Introdução: A síndrome hemolítico-urêmica atípica (SHUa) é uma condição rara de microangiopatia trombótica, com acometimento multissistêmico e manifesta-se clinicamente pela tríade anemia hemolítica microangiopática não imune, trombocitopenia e injúria renal. O prognóstico, nestes casos, é desfavorável devido a elevada taxa de morbidade e mortalidade na fase aguda, além do risco de evolução para doença renal crônica terminal em cerca de 50% dos casos. O objetivo deste trabalho é relatar o caso de uma paciente pediátrica com desenvolvimento de doença renal crônica (DRC), demonstrando a importância do diagnóstico precoce, além do acompanhamento longitudinal para manejo adequado de comorbidades. Caso clínico: Escolar, 9 anos, sexo feminino, diagnosticada com síndrome hemolítico-urêmica atípica há 5 anos e em seguimento ambulatorial irregular com nefrologia pediátrica desde então. Neste período, apresentou deterioração gradativa da função renal evoluindo com DRC e atualmente, apresenta complicações associadas, como anemia, baixa estatura e hipertensão. Discussão: Como dito, uma das consequências da SHUa é a evolução para DRC.
Continuous casting heat transfer model – The spray cooling control problem
Authors: Baptista Luis Antonio S. , Sales Roberto Carlos , Almeida Carolina Moreira de , Garção Wysllan J. L. , Ferreira Alexandre F.
Published: December 2023

In the steel industry, the continuous casting process is regarded as the second significant technical innovation after the advent of the oxygen steelmaking process. Prevailing thermal conditions are a dominant factor in the quality of the product. The common practice of spray control in which water flow in the sprays is proportional to the casting speed is inadequate to unsteady state conditions during speed changes. The objectives of the present study were twofold. The first was to study the basic principles of spray control. As a required tool, a mathematical model for the thermal field was developed. This model was to be used to simulate the temperature distribution in the strand. The second objective was to use these principles to develop a model for controlling the sprays. The thermal model has been used to analyze the effects of both practices on the surface temperature of the strand. The results have shown that a significant temperature fluctuation can be generated by proportional control and that the new control model realistically predicts the thermal requirements of the strand during changes in casting speed.
Pentingnya Pembentukan Perkumpulan bagi Pelaku UMKM Kebon Manggis Matraman
Authors: Purwaningsih Endang , Irwan Santosa  , Nelly Ulfah Anisariza
Published: December 2023

Tujuan program ini adalah memberikan pengayaan materi tentang pentingnya peran perkumpulan bagi upaya menunjang keberlangsungan serta kemajuan pelaku UMKM dalam usahanya, serta memberikan motivasi untuk membuat perkumpulan UMKM. Mitra dalam program ini adalah pelaku UMKM di Kelurahan Kebon Manggis Matraman, berjumlah 270 orang. Permasalahan yang dihadapi mitra antara lain: (1) keterbatasan akses informasi hukum terlebih tentang legalitas dan tata cara pembentukan perkumpulan berbadan hukum, (2) kurangnya intervensi & fasilitasi, hingga saat ini belum ada pihak yang memfasilitasi berdirinya perkumpulan, dan (3) kurangnya wawasan pengetahuan hukum pelaku UMKM terkait legalitas seputar usaha dan badan usaha. Solusi yang ditawarkan adalah dengan memberikan edukasi dan pelatihan serta pendampingan hingga para pelaku UMKM termotivasi untuk mendirikan atau membentuk perkumpulan untuk memperkuat legalitas bersama dan memperlancar program-program pemerintah maupun institusi lain yang dapat disalurkan melalui perkumpulan. Kegiatan telah dilaksanakan dengan baik, bahwa telah terjadi peningkatan yang sangat signifikan berkaitan dengan pengetahuan para pelaku UMKM berkaitan dengan urgensi perkumpulan Pelaku UMKM, legalitas perkumpulan serta motivasi pelaku UMKM untuk memiliki legalitas perkumpulan.
Система опирания и крепления многопустотных железобетонных плит на металлические балки
Authors: КОРЖОВ Олег Викторович , ПОТАПОВ Александр Владимирович
Published: December 2023

Объектом данного исследования являются различные узлы опирания и крепления многопустотных железобетонных плит на металлические балки, в том числе с перфорированной стенкой. Цель исследования - получение аналитических и расчетно-теоретических данных для разработки конструктивных решений опирания и крепления многопустотных железобетонных плит на металлические балки. В результате анализа зарубежной и отечественной научно-технической, нормативной и методической литературы в области конструирования и расчета сборных многопустотных железобетонных плит и стальных балок при учете их совместной работы установлено, что в отечественных и зарубежных нормативных документах подходы к определению несущей способности таких соединений имеют значительные отличия, поэтому зарубежный опыт подобных исследований не может быть использован при внесении изменений в отечественные нормативные документы. В работе обосновывается актуальность данной тематики и научная новизна ожидаемых результатов дальнейших исследований, в том числе экспериментальных. Результаты исследования предлагается использовать при разработке нормативных технических документов, в частности при подготовке изменений к своду правил "Конструкции сталежелезобетонные. Правила проектирования".
Расчет буронабивных свай большого диаметра на горизонтальную нагрузку
Authors: ГОТМАН Альфред Леонидович , ОРЕХОВ Вячеслав Валентинович , КУРГУЗОВА Евгения Вадимовна
Published: December 2023

Представлен аналитический метод расчета буронабивной сваи большого диаметра на горизонтальную нагрузку и изгибающий момент. Дается расчетная схема горизонтально-нагруженной сваи в винклеровском многослойном по глубине основании, характеризуемым коэффициентом постели, постоянным в пределах каждого слоя. Изгибная жесткость ствола сваи принята бесконечной. Изменение горизонтальных перемещений сваи выбрано как для жесткого стержня в линейно-деформированной среде. По результатам расчета определяются горизонтальное перемещение и угол поворота головы сваи, а также изгибающий момент и поперечная сила по всей длине сваи. Дан пример расчета по разработанному методу.
Transient Liquid-Phase Sinter-Bonding Characteristics of a 5 um Cu@Sn Particle-Based Preform for High-Speed Die Bonding of Power Devices
Authors: Han Byeong Jo , Cho Sang Ho , Jeon Kang Rok , Lee Jong-Hyun
Published: December 2023

To ensure the high-temperature stability of a bondline under next-generation power devices such as SiC semiconductors, a die bonding test was performed by transient liquid-phase (TLP) sinter-bonding using a Sn-coated Cu (Cu@Sn) particle-based preform. Compared to the existing 20 min-bonding result using a 30 μm Cu@Sn particle-based preform, a 5 μm Cu@Sn particle-based preform was used to significantly reduce the bonding time to 5 min, and the optimal levels of the amount of Sn in the Cu@Sn particles, the thicknesses of Sn surface finish layers on the chip and substrate, and compression pressure during the bonding were investigated. The Sn content in the Cu@Sn particles significantly changed the microstructure, including the porosity of the prepared preform. The preform porosity of 0.01% was confirmed after the formation of sufficient Sn shells with an average thickness of about 602 nm at Sn 30 wt%. In addition, in the preform with Sn 30 wt% content, the Sn phase was almost depleted after 3 min after annealing at 250 °C. The Sn finish layer was evaluated in the thickness range of 0.63−4.12 µm, and it was observed that the shear strength of the formed bondline tended to increase with increasing pressure for all Sn layer thicknesses. In particular, when the bonding was carried out at a pressure of 2 MPa using a dummy Cu chip and substrate coated with a 1.53 μm thick Sn layer, the best shear strength value of 36.89 MPa was achieved. In this case, all the Sn phases transformed into intermetallic compound phases of Cu6Sn5 and Cu3Sn, and all the phases formed within the bondline, including Cu, exhibited high melting-point characteristics. Therefore, it was determined that there would be no remelting of the bondline or a drastic decrease in mechanical properties in a high-temperature environment below 300 oC, as initially intended. By increasing the content of the Sn shell up to 30 wt%, it was possible to achieve a nearly full density (porosity: 0.3%) bondline structure, due to the rearrangement behavior of particles, by maintaining liquid Sn for a long time during the bonding process. In conclusion, the optimal Sn finish thickness was determined to be at the level of 1.5 µm, and the optimal pressure was at the level of 2 MPa. The short bonding time of 5 min represents a significant advance in TLP bonding processes, and it is expected to contribute to a substantial improvement in the die bonding of future SiC power devices.
THE INFLUENCE OF YOUTUBE ADVERTISING VALUE ON BRAND AWARENESS AND PURCHASE INTENTIONS OF VIETNAMESE CUSTOMERS
Authors: Thi Phuong Linh Nguyen
Published: December 2023

Youtube advertising is gradually becoming a form of advertising that attracts many enterprises and customers. This research is based on a survey of 450 customers in Vietnam in two forms: direct distribution and collection at some colleges, some companies, some supermarkets and online survey via Google Docs tool in November, 2020 about factors that affecting advertising value on Youtube and the relationship between advertising value on Youtube, brand awareness and customer purchase intention. The results show that entertainment, informativeness, irritation and interactivity have a positive effect on advertising value on Youtube, in which entertainment has the most positive and strongest influence on advertising value on Youtube and irritation has a negative effect on advertising value on Youtube. The author also pointed out the relationship between advertising value on Youtube, brand awareness and Vietnamese customer purchase intention.
The Role of Ancestors in Iban Traditional Religion
Authors: Clark Kyle , Rikando Riki
Published: December 2023

Cross-cultural studies of religion have consistently treated ancestor worship as a specific, narrow practice that is found in many traditional societies but far from all of them. In contrast, Steadman, Palmer, and Tilley (1996) have proclaimed that ancestor worship was a universal behavior in traditional, small-scale societies and that the practice is found in societies where it was previously thought to be absent. In this paper, we describe one such society, the Iban, whose religious practices are often claimed to not include the worship of ancestors, despite ancestors being central to their religion. We demonstrate that many of the gods and spirits of the Iban supernatural pantheon are most clearly understood as ancestors. Furthermore, we argue that the Iban example may not be an outlier, and that ancestor worship may be prevalent in many more societies than previously claimed. We end by describing the weaknesses of some of the common reasons used to downplay the ubiquity of the practice in previous ethnographic treatments and cross-cultural studies.
Crossing The Rubicon? Maintenance and Change Among Today’s Iban in Sarawak
Authors: Sercombe Peter
Published: December 2023

Among communities reliant on subsistence agriculture as a means of production, transition to wage work may seem indicative of economic progress. In the 21st century, the Iban in East Malaysia utilise three production modes: subsistence rice farming; commerce; and, waged work, to support food requirements and satisfy consumer needs. Waged work is increasingly important, even replacing subsistence and commerce. This study considers perceptions of maintenance and change among the Iban in the Sri Aman Division of Sarawak. The purpose is to gain perspectives of heads of households about “maintenance” and “change”. Research was conducted qualitatively, via observation and interviews. Maintenance is reflected through ongoing use of the Iban language; the longhouse is seen as being of continuing importance for resident and non-resident relatives, even if no longer bound to ancestral longhouse territory. Changes include new technologies, the importance of money, reduced adherence to Iban traditions, and conversion to Catholicism, among the community studied here. Salience of these matters lies in Iban understanding of ways in which modernisation is occurring in their community, in a region known for its biological, cultural and linguistic diversity, providing a voice for community members, and their insights about the contemporary Iban world.
Auto Timetable Management Mobile Application
Authors: Cheuk Sharon , Chai Samuel Ye Ler
Published: December 2023

In this fast-paced lifestyle, we play multiple roles and bear different responsibilities. This kind of lifestyle needs proper time management skills to look after the tasks and duties that have been entrusted. In order to do time management effectively, tools such as timetables are commonly adopted. Rescheduling of a timeslot in a timetable could happen due to certain unforeseen events that require immediate action. The rearrangement of one timeslot could possibly affect another timeslot in a timetable, essentially, it needs extra time and effort to draw new planning. In this paper, we proposed to develop an auto timetable scheduling mobile application to combat the hustle of manual timetable management. By assigning priority levels and constraints such as the preferred time and date of a task, the proposed application can reschedule and generate a new timetable automatically. With the proposed application, we claim that users can reduce the hustle of creating and managing their timetables in a manual way.
Improving energy efficiency in the tertiary treatment of Alguazas WWTP (Spain) by means of digital twin development based on Physics modelling
Authors: Royo Lucía , Labarías Alejandro , Arnau Rosario , Gómez Antonio , Ezquerra Alba , Cilla Irene , Díez-Antoñazas Lourdes
Published: December 2023

The situation of water stress and desertification is worsening, especially in southern Europe, which is making it necessary to resort to water reuse as a key component of integrated water resource management. In addition, the new quality criteria defined by European legislation, both for water treated in WWTPs that is discharged into a particularly sensitive receiving environment, and for water reclaimed in tertiary treatment for reuse, are becoming increasingly restrictive. For all these reasons, it is necessary to keep up the pace of improving the WWP efficiency of the processes, based on their knowledge and through the application of new digital tools that allow these processes to be improved. DTCONEDAR has been conceived as an industrial research project, with a multitude of innovative aspects, necessary to advance in the digital transformation of the water industry 4.0, to respond to a current need in the water treatment sector like the implementation of digital twins, which in addition to using data from sensor measurements, use data calculated from simulators, which has already been successfully implemented in other industrial sectors. The incorporation of models using simulators has made it possible to reproduce in detail the behaviour of the processes, understand their dynamics and propose new control and automation strategies in the WWTPs. This project (AEI-010500-2022b-196) is subsidised thanks to the support grants for Agrupaciones Empresariales Innovadoras (AEI) of the Ministry of Industry with the aim of improving the competitiveness of SMEs within the Recovery, Transformation and Resilience Plan funded by the NextGen EU.
Study on the Aral Sea crisis from the risk assessment of polycyclic aromatic hydrocarbons and organochlorine pesticides in surface water of Amu Darya river basin in Uzbekistan
Authors: Jin Miao , Wu Jinglu , Zhang Hongliang , Zhao Zhonghua , Alam Manawwer , Guo Ru
Published: December 2023

The Amu Darya River, as one of the important flows of the Aral Sea located in the semi-arid area of Central Asia, also performed as the primary water supply for Uzbekistan. Therefore, the residues and risks of anthropogenic-related persistent organic pollutants (POPs) in waters of the Amu Darya River were conducted in the present study to elucidate their possible effects on the water safety in such a specific area as well as on the Aral Sea Crisis from a new perspective. Thirty-nine water samples distributed along the Amu Darya River to the coastal of the Aral Sea were analyzed for both polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) occurrence, showing the total concentrations of ΣOCPs and ΣPAHs in the range of 1.16–22.75 ng/L and 3.18–506.26 ng/L, respectively. Spatial differences showed higher levels for both OCPs and PAHs along the lower reaches of the Amu Darya River due to intense human activities. Source identification performed by isomer ratios indicated that dichlorodiphenyltrichloroethanes (DDTs) probably originated from recent use, while hexachlorocyclohexanes (HCHs), chlordanes, and endosulfans originated mainly from historical usage. Furthermore, the principal component analysis showed PAHs were from coal and petroleum combustion (65.2%), biomass combustion (27.2%), and industrial chemical combustion (7.64%). The human health risk assessment demonstrated no carcinogenic or non-carcinogenic risks at present. However, moderate to high ecological risks to aquatic organisms especially were observed along the lower reaches, especially the delta area. The results obtained would not only provide important basic data for such a semi-arid area but also show us the possible toxic effects induced by such pollutants, which should attract more attention in the shrinking case of the Aral Sea.
Segmented superimposed model of near-bore reservoir pollution skin factor for low porosity and permeability sandstone horizontal gas wells
Authors: Zhang Shuangshuang , Guo Kangliang , Zhang Zhiquan
Published: December 2023

Drilling and completion processes can often result in reservoir contamination around the wellbore, leading to decreased oil and gas productivity and significant economic losses for the oil field. This issue is particularly complex in sandstone reservoirs with low porosity and permeability horizontal wells, wherein traditional models have limited accuracy and applicability due to numerous unknown parameters. To address this challenge, this study focuses on non-uniform pollution around horizontal wells and proposes a new approach to divide the horizontal well pollution area into N micro-element sections. By establishing a seepage differential equation and employing the similar flow substitution method, we construct models for the pollution skin coefficient of each micro-element section as well as the total pollution skin coefficient. Furthermore, we combine empirical equation models and an oscillation-decreasing function model to develop a pollution radius distribution model that encompasses linear, parabolic, exponential, and logarithmic patterns. Through these advancements, we can realize a comprehensive reservoir damage assessment method. It is verified that the calculation error of this model is very small, and the influence of skin effect and reservoir anisotropy and the radius distribution of various heterogeneous pollution zones are fully considered. These findings indirectly suggest the rationality and practicality of the model presented in this paper. By incorporating actual gas well data into this model, it has been determined through discussion and analysis that the exponential distribution of the pollution radius has the greatest impact on the pollution skin factor along the horizontal well, from the heel to the toe. Increasing the pollution radius and decreasing the pollution permeability both result in an increase in the skin factor of the micro-segment and the total pollution skin factor of the horizontal well. However, compared to the pollution permeability, the radius of the pollution zone has a relatively minor effect on the total pollution skin factor. The proposed technique aims to serve as a valuable tool in optimizing and designing stimulation measures aimed at boosting production and minimizing formation damage. Through evaluation and analysis to reduce risks, protect reservoirs and extend well life, reduce costs, and enhance technical capabilities and economic benefits.
Research on a multilevel scheduling model for multi variety and variable batch production environments based on machine learning
Authors: Wang Long , Liu Haibin , Xia Minghao , Wang Yu , Li Mingfei
Published: December 2023

Traditional manufacturing enterprises cannot adjust their production line structure in the short term. They face significant challenges in adapting to the rapidly changing market environment and meeting various variable batch production requirements. Building a suitable and convenient multi-layer planning and scheduling model is an important goal to solve the efficient operation of manufacturing enterprises. This paper proposes a planning and scheduling design that meets the needs of enterprise and the production workshop using the APERT-VC model through a top-down design methodology. APERT is an enterprise-level plan that uses attention mechanisms to collect job plan time and decomposes project plans into workshop plans through PERT technology. virtual command is workshop level plan management, which converts workshop plans into time series vectors and achieves rapid and comprehensive guidance of workshop resource planning for enterprises through multiple classification and decision-making. Through experiments, the algorithm achieved production scheduling accuracy improvement of over 30% compared to previous algorithms and a decision accuracy rate of over 90%. The first half of the new model solves the problem of collecting work time for multi variety and variable batch products, and improves the accuracy of algorithm input. The second half of the new algorithm innovatively combines image recognition technology with dispatcher behavior, achieving efficient simulation results.
Resilient distributed control of islanded microgrids under hybrid attacks
Authors: Liu Yao , Du Zhaobin , Chen Yan , Zhan Haoqin
Published: December 2023

In this paper, a resilient control strategy is proposed to improve the stability of frequency and voltage recovery for the islanded microgrid (MG) under hybrid cyber attacks. To deal with the common false data injection attacks (FDI) and denial of service attacks (DoS) in MGs, the proposed resilient control strategy utilizes the observers to accurately estimate the potential FDI signals on both the sensors and actuators of each distributed generation unit (DG) and reconstruct the unavailable states in the system to enhance the system’s ability actively. The ultimate uniform boundedness (UUB) of the system under hybrid cyber attacks is proved by the Lyapunov stability theory. Finally, an islanded MG system is established in MATLAB/SIMULINK, and multiple scenarios are simulated to verify the effectiveness of the method.
Calculation of electricity sales based on multi-factor correlation analysis
Authors: Zhou Jian , Tuo Jianjun , Wang Lingbo , Shi Yaqi , Zha Wenting
Published: December 2023

Electricity sales is one of the important assessment indexes of a power grid company’s operation. Since electricity sales is closely related to many factors, how to consider the influence of multiple factors and improve the accuracy of the calculation of electricity sales is a difficult problem that needs to be solved urgently. In this paper, we first analyze the six dimensions affecting electricity sales and select the key influencing factors that can be quantified statistically. Secondly, the key influencing factors are screened according to Pearson’s correlation coefficient and then the calculation model of electricity sales is established based on the random forest algorithm. Finally, we validate the feasibility and validity of the proposed calculation method for electricity sales through a case study.
Effect of warm mix agent on the chemo-mechanical performance of binder with different oil sources
Authors: Chang Rong , Sha Aimin , Wang Jie
Published: December 2023

In this study, three typical oil source asphalt binders, Karamay asphalt A, CNOOC 36-1 asphalt B, Qinhuangdao CNPC asphalt C, were selected to prepare asphalt binders together with the warm mix agent Evotherm M1. The effects of warm mix agents on asphalt from different oil sources were experimentally studied via dynamic shear rheological (DSR), thermogravimetric analysis (TG), and Raman spectroscopy tests. The asphalt binders with different oil sources exhibit different properties. The rheological test results indicate that the addition of warm mix agent can slow down the decrease of asphalt viscosity during the aging process and the aging of asphalt. The results of the thermogravimetric test showed that the residual mass of asphalt with the addition of a warm mix agent significantly decreased after aging. Warm mixing agents can slow down the conversion of lightweight components to heavy components during the aging process of asphalt. By calculating the reflectivity of asphalt in Raman spectroscopy, it can be concluded that the reflectivity of asphalt decreases after adding a warm mix agent. The warm mixing agent reduces the degree of thermal evolution of asphalt. Warm mixing agents can make the chemical components in asphalt relatively stable and less prone to further pyrolysis or cracking reactions.
Research on dynamic robust planning method for active distribution network considering correlation
Authors: Li Jiangnan , Zhou Baorong , Yao Wenfeng , Zhao Wenmeng , Cheng Renli , Ou Mingyu , Wang Tao , Mao Tian
Published: December 2023

The universality of load subjects in distribution network brings challenges to the reliability of distribution network planning results. In this paper, a two-stage dynamic robust distribution network planning method considering correlation is proposed. The method evaluates the correlation between random variables using the Spearman rank correlation coefficient, and converts the correlated random variables into mutually independent random variables by Cholesky decomposition and independent transformation; expresses the source-load uncertainty by a bounded interval without distribution, and describes the active distribution network planning as a dynamic zero-sum game problem by combining with the two-phase dynamic robust planning; use the Benders decomposition approach to tackle the issue; mathematical simulation is used to confirm the accuracy and efficacy of the method. The results show that the dynamic robustness planning method of active distribution network taking into account the correlation can accurately simulate the operation of active distribution network with uncertain boundaries, which enhances the reliability and economy of the active distribution network planning results.
A data-driven approach for generating load profiles based on InfoGAN and MKDE
Authors: Lan Jian , Zhou Yanzhen , Guo Qinglai , Sun Hongbin
Published: December 2023

High-quality demand-side management requires an abundance of load profiles to support decision-making processes. However, customer energy consumption data often contains sensitive personal information, and service providers face significant challenges in accessing a substantial amount of energy consumption data. To generate a large volume of customer data without compromising privacy, this study introduces a data-driven approach integrating Information Maximizing Generative Adversarial Networks (InfoGAN) with Multivariate Kernel Density Estimation (MKDE) for the generation of load profiles. InfoGAN is firstly trained based on existing customer load profiles, with the Q network disentangling the load into feature variables and the generator producing realistic profiles. Subsequently, MKDE is utilized to assess the distribution of these features, enabling the generation of new profiles by sampling new feature variables. The proposed method circumvents the need for intricate sampling or modeling processes and generates realistic data that represents the inherent uncertainties and fluctuations characterizing customers’ electricity consumption. The generated data could be used as the substitution for real electricity consumption data, thereby facilitating further applications without compromising privacy concerns.
Numerical investigation of energy loss distribution in the cavitating wake flow around a cylinder using entropy production method
Authors: Zhang Guangjian , Yang Xiufei , Li Yan , Ge Mingming , Gu Fadong
Published: December 2023

The wake flow of a circular cylinder is numerically investigated by Large Eddy Simulation (LES) combined with the Schnerr–Sauer cavitation model. By comparing entropy production in the presence or absence of cavitation, the energy loss distribution in the wake flow field of a cylinder is explored, shedding light on the interactions between multiscale vortex systems and cavitation. The comparative results reveal that, under non-cavitating conditions, the energy loss region in the near-wake area is more concentrated and relatively larger. Energy dissipation in the wake flow field occurs in regions characterized by very high velocity gradients, primarily near the upper and lower surfaces of the cylinder near the leading edge. The influence of cavitation bubbles on entropy production is predominantly observed in the trailing-edge region (W1) and the near-wake region (W2). The distribution trends of wall entropy production on the cylinder’s surface are generally consistent in both conditions, with wall entropy production primarily concentrated in regions exhibiting high velocity gradients.
Circulating exosomal microRNAs as biomarkers of lupus nephritis
Authors: Chen Fei , Shi Bo , Liu Wenjing , Gong Jianmin , Gao Jia , Sun Yifan , Yang Ping
Published: December 2023

Objective

Disruption in the delicate symphony of genes, microRNA (miRNA), or protein expression can result in the dysregulation of the immune system, leading to the devastating consequences such as lupus nephritis (LN). The capacity of exosomes to transport miRNAs between cells and modify the phenotype of recipient cells implies their involvement in persistent kidney inflammation. This study unveils identifying two previously undiscovered exosomal miRNAs in the serum of LN patients, offering potential solutions to the current challenges in LN diagnosis and management.

Methods

Initially, we used a reagent-based kit to isolate serum exosomes from patients with Systemic lupus erythematosus (SLE) and used Trizol method for total RNA extraction. Subsequently, we employed small RNA sequencing to screen for differential expression profiles of exosomal small RNAs. The RT-qPCR method was used to individually validate samples in both the screening and validation cohorts, enabling the identification of candidate small RNAs; specific to LN. We assessed the diagnostic potency using receiver operating characteristic (ROC) curve, and explored the biological roles of miRNAs using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses.

Results

Compared to SLE patients without LN, SLE patients accompanied by LN exhibited significantly spiked levels of exosomal hsa-miR-4796-5p and hsa-miR-7974. The duo of miRNAs, hsa-miR-4796-5p and hsa-miR-7974, exhibited promising potential as biomarkers for diagnosing LN, with an AUC exceeding 0.8. Correlation analysis revealed a strong positive association between these miRNAs and proteinuria, as well as the SLE Disease Activity Index (SLEDAI) score. Moreover, the levels of two miRNAs in LN patients were significantly elevated in comparison to other autoimmune nephritis conditions, such as immunoglobulin A nephropathy (IgAN) and diabetic nephropathy (DN). Furthermore, the bioinformatics analysis indicated that this miRNAs duo can play a pivotal role in the regulation of immune processes by modulating signal pathways, such as the mTOR and PI3K-Akt signaling pathway.

Conclusion

This study provides a new ground that serum exosomal miRNAs can effectively identify and predict LN in SLE patients.
Peripheral blood CD19 positive B lymphocytes increase after ischemic stroke and correlate with carotid atherosclerosis
Authors: Zhang Yuhua , Jiang Yu , Zou Yutian , Fan Yinyin , Feng Ping , Fu Xiang , Li Keru , Zhang Jinru , Dong Yunlei , Yan Shuying , Zhang Yanlin
Published: December 2023

Introduction

Atherosclerosis is the primary pathological basis of ischemic stroke, and dyslipidemia is one of its major etiological factors. Acute ischemic stroke patients exhibit imbalances in lymphocyte subpopulations, yet the correlation between these dynamic changes in lymphocyte subpopulations and lipid metabolism disorders, as well as carotid atherosclerosis in stroke patients remains poorly understood.

Methods

We retrospectively analyzed the demographic data, risk factors of cerebrovascular disease, laboratory examination (lymphocyte subsets, lipid indexes, etc.), clinical features and c;/]-sity from December 2017 to September 2019 and non-stroke patients with dizziness/vertigo during the same period.

Results

The results showed that peripheral B lymphocyte proportions are elevated in acute ischemic stroke patients compared with those of the control group (13.6 ± 5.3 vs. 11.7 ± 4.4%, p = 0.006). Higher B lymphocyte proportions are associated with concurrent dyslipidemia, increased levels of vascular risk factors including triglycerides (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and very-low-density lipoprotein cholesterol (VLDL-C), as well as decreased levels of the protective factor high-density lipoprotein cholesterol (HDL-C). Elevated B lymphocyte proportions are independently correlated with carotid atherosclerosis in stroke patients.

Discussion

We found CD19 positive B Lymphocytes increase after ischemic stroke and correlate with Carotid Atherosclerosis. Lymphocyte subpopulations should be highlighted in stroke patients.
Managing social networking stress: the role of self-management in reducing social media exhaustion and improving higher education employee performance
Authors: Moughal Wajiha , Nordin Shahrina Md. , Salleh Rohani Bt , Abbasi Haider Ali
Published: December 2023

This study investigates the significance of self-management in academic staff stress management related to social networking sites (SNS). It emphasizes particularly on reducing social media exhaustion and increasing job effectiveness. The research applies the stressor-strain-outcome theory and the Smart PLS (partial least squares) analytical approach to examine data from 391 respondents. The study’s goal is to provide empirical data on the efficacy of self-control management in reducing SNS stress and its effects on academic staff’s psychological wellbeing and job performance. Data is collected by survey using online email platforms among academic employees, and the collected data is examined utilizing the Smart PLS approach. This approach allows for an investigation of the proposed links and their statistical importance. This research’s ramifications are important for academic institutions since its results can help academic personnel effectively cope with SNS-related stress. Academic employees can better limit their SNS usage and avoid social media tiredness by promoting self-control management practices. As a result, academic employees’ job performance and overall wellbeing may increase. The study’s findings help to comprehend how self-management might reduce SNS stress and improve staff performance in the academic sector.
Prevalence and determinants of asthenopia among ophthalmologists in China: a national cross-sectional survey
Authors: Lin Na , Zhu Yu , Wu Xiaotian , Yang Maoyuan , Lu Fan , Deng Ruzhi
Published: December 2023

Introduction

The role of ophthalmologists is defined by tasks requiring visual effort, emphasizing the importance of examining their condition within the realm of occupational visual health. Our goal was to explore the occurrence of asthenopia among Chinese ophthalmologists and identify contributing factors through the use of a reliable and validated survey instrument.

Methods

A national cross-sectional online survey was carried out in June 2017, involving 6,220 practicing ophthalmologists in China. Utilizing an 11-item Asthenopia Survey Questionnaire with established reliability and validity. Prevalence rates of asthenopia among subgroups categorized by age, gender, hospital classification, physician level, daily near vision activity duration, sleep duration, sleep quality, presbyopia status, and history of eye surgery were determined using the independent t-test, chi-square test and bonferroni test. Multiple logistic regression analysis was employed to pinpoint independent factors linked to asthenopia.

Results

Out of the 5,009 ophthalmologists who completed the survey, a 40.7% prevalence of asthenopia was identified. Multivariate analysis revealed that good sleep quality (OR: 0.24, 95%CI: 0.20–0.30), moderate sleep quality (OR: 0.47, 95%CI: 0.38–0.59), engaging in daily near vision activities for less than 7 h (OR: 0.76, 95%CI: 0.68–0.86), having daily sleep duration exceeding 7 h (OR: 0.87, 95%CI: 0.77–0.98), and working in tertiary hospitals (OR: 0.88, 95%CI: 0.78–0.99) were protective factors against asthenopia. Conversely, presbyopia was identified as a risk factor (OR: 1.33, 95%CI: 1.04–1.70). All calculated p values were below 0.05. Age, gender, physician level, and eye surgery history were not related factors.

Conclusion

Asthenopia is prevalent among Chinese ophthalmologists, with employment in tertiary hospitals providing a protective effect and presbyopia is a risk factor. Preventive strategies include improving sleep quality, restricting daily near vision activity to under 7 h, and extending daily sleep duration to over 7 h. Further investigation is needed to explore the protective implications of working in tertiary hospitals.
Analysis and Experimental Investigation of Steering Kinematics of Driven Steering Crawler Harvester Chassis
Authors: Wang Yanxin , Jin Chengqian , Yang Tengxiang , Wang Tingen , Ni Youliang
Published: December 2023

In the context of automatic driving, the analysis of the steering motion characteristics is critical for enhancing the efficiency of crawler harvesters. To address issues such as the low transmission efficiency and the large steering radius encountered by traditional crawler harvesters featuring hydrostatic drives, a driven steering crawler harvester chassis was designed. This involved analysis of the chassis transmission system structure and its steering characteristics under several conditions, including differential steering, differential direction reversal, and unilateral braking steering. The steering parameters were determined based on real-time kinematic positioning–global navigation satellite system (RTK-GNSS) measurements, and they were compared with theoretical predictions based on the crawler harvester steering kinematics. The slip rates and modified models of the crawler chassis for various steering modes were then obtained. The results indicated that the increase in the ratio between the running input and steering input speeds led to larger track steering radii and smaller average rotational angular velocities. Remarkably, the slopes of the linear fits of the tracked chassis steering parameters varied significantly under differential direction reversal and differential steering modes. Compared with the actual results, the correlation coefficient of the tracked chassis steering parameters fitting model is close to 1. The steering parameter model was deemed suitable for actual operational requirements. The results provide a valuable reference for designing navigation and steering models of crawler harvesters operating on different road surfaces.
Design and Experimental Study of Single Plant Harvester for Potato Breeding Experiments
Authors: Wang Weijing , Yang Ranbing , Pan Zhiguo , Qing Yiren , Zhang Jian , Chen Dongquan , Guo Xinyu , Lyu Shiting
Published: December 2023

In order to solve the current problems of time-consuming manual work and low harvesting efficiency during the harvesting of potato breeding trials and the inability of traditional harvesting machinery to meet the requirements of potato single plant harvesting, a single plant harvester for potato breeding with a combined excavation device and a conveying and separating device with alternating concave and straight units is designed. This paper analyzes the force, motion, and collision of potato plants in the digging transition stage and conveying and separating stage. The key factors affecting the rate of single plant integrity and the rate of injured potatoes are determined. A three-factor quadratic regression orthogonal rotating combination experiment is conducted with the rate of single plant integrity and the rate of injured potatoes as experiment indexes, forward speed, conveying speed to forward speed ratio, and the rotational speed of the rear-vibration device as influencing factors. Based on the experiment results, a mathematical regression model is established, and response surface analysis and parametric analysis are conducted to determine that when the forward speed is 0.65 m∙s−1, the ratio of conveying speed to forward speed is 0.98, and the speed of the post-vibration device is 11.52 rad∙s−1, the single plant integrity rate is 97.14% and the rate of injured potatoes is 0.67%. The machine can better meet the requirements of potato single plant harvesting and solve the problem of plant mixing. From the perspective of potato damage rate, potato breeding harvesters are also suitable for traditional potato harvesting.