bluuebunny/crossref_metadata_2025 huggingface dataset:
Centenaria institucionalizada recuperada por COVID-19 con generación de inmunidad: Un caso de estudio
Authors: Zambrano-Urbano José Leonel , Buitrago-Gómez Nathalia , Muñoz-Realpe Juan Felipe , Ocampo-Chaparro Jose Mauricio , Reyes-Ortiz Carlos Alfonso
Published: September 2021

Introducción: El virus SARS-CoV-2 y su enfermedad COVID-19, afecta con mayor severidad a personas adultas mayores, sobre todo aquellas con multimorbilidad y fragilidad; esto debido a mecanismos fisiológicos como la inmunosenescencia o un pobre control de la actividad inflamatoria en esta población. Los estudios sobre el diagnóstico y tratamiento en estos pacientes son escasos y muchos de ellos tienen niveles de evidencia bajos. Objetivo: Describir las características clínicas y paraclínicas de una adulta mayor centenaria institucionalizada, frágil, con multimorbilidad quien sobrevive a la infección y desarrolla inmunidad en una unidad geriátrica de agudos. Presentación del caso: Centenaria institucionalizada con multimorbilidad y fragilidad con criterios de severidad de la enfermedad, quien fue manejada tempranamente y recuperada, llegando a desarrollar inmunidad. Conclusiones: El diagnóstico temprano, un manejo precoz y el abordaje geriátrico integral e interdisciplinar son indispensables para un desenlace favorable en pacientes adultos mayores con alto riesgo de progresión de enfermedad con COVID-19.
Agricultural work on the sacred lands of Attica IV B.C. according to epigraphica
Authors: Bulycheva Elena Vladimirovna
Published: September 2021

This article deals with the issue of carrying out agricultural work on the sacred lands of ancient Attica (Athens region) in the IV century B.C. The author relies on epigraphic sources, which are inscriptions on stone steles containing texts of lease agreements on sacred lands of the IV century B.C, and also uses information from ancient authors. The author also attracts scientific works of domestic and foreign authors devoted to the problem of agrarian relations in the ancient Greek polis. According to the author, the analysis and study of agricultural work on the territory of the sacred lands of Attica deserves a separate article, since the study of this issue makes it possible to more thoroughly consider agricultural relations in the Athenian polis of the IV century B.C, to present the meaning of sacred land ownership. In the first part of the article, the author analyzes the types and nature of agricultural work on sacred lands (temenos). The second part is devoted to the problem of responsibility of tenants and landlords for the performance of work on the territory of temenos. As a result, the author comes to certain conclusions. In the fourth century B.C, the sacred lands of Attica required special care after the end of the devastating actions of the Peloponnesian War. The temenos were at the disposal of the polis, with demes and religious unions as their landlords. The leasing of land made it possible to ensure the stable preservation of the land fund, to ensure the agricultural development of the temenos. Tenants (private individuals) were required to provide careful care for the leased land. At the same time, the author draws attention to the fact that in some cases the tenants were very well-known, wealthy citizens of the polis, for whom participation in the lease of sacred lands was a kind of liturgy. In such cases, it is difficult to determine who performed agricultural work on the leased land, most likely, it was special employees, whose work was paid by the tenant. At the same time, according to the epigraphica, there was no sublease.
Book review: Gunn G.C. Overcoming Ptolemy: the Revelation of an Asian World Region. Lexington Books, 2018. XXXIV, 289 p.
Authors: Shcheglov Dmitry Alexeyevich
Published: September 2021

-
Book Review: War, politics, memory: The Napoleonic Wars and the First World War in the space of Anniversaries. Ed. by O.S. Porshneva (chief editor), N.N. Baranov, V.N. Zemtsov. M.: Politicheskaya enciklopediya, 2020
Authors: Kondratiev Sergey Vitalievich , Kondratieva Tamara Nikolaevna
Published: September 2021

-
Cooperação virtual e ODS nas universidades do espaço ibero-americano
Authors: Larrondo-Ureta Ainara , Zamith Fernando , Peña-Fernández Simón , Meso-Ayerdi Koldobika
Published: September 2021

Este artigo tem como objetivo descrever três projetos de inovação educativa no campo do ciberjornalismo, úteis para avaliar o valor da inovação pedagógica para além da introdução e exploração didática das TIC. Estes projetos foram desenvolvidos pelo grupo de investigação KZBerri (Gureiker.info), financiado pela Universidade do País Basco entre 2015 e 2020, e partem do pressuposto de que a prática que se desenvolveu no âmbito da disciplina "Escrita Ciberjornalística" é útil para preencher a lacuna dos currículos de comunicação quando se trata de fomentar nos estudantes culturas profissionais altamente procuradas pelas empresas atuais do setor. Essas culturas são baseadas em valores como empreendedorismo em projetos de comunicação, criatividade e cooperação profissional em contextos convergentes e internacionais. Dois dos projetos descritos também representam a primeira aplicação da “internacionalização em casa” (IaH) (Crowther, 2001; Beelen e Jones, 2015) à inovação pedagógica em ciberjornalismo.
Cultura e Pandemia: precarização do trabalho cultural na Baixada Fluminense
Authors: Guerreiro João , Borja Bruno , Villares Luise , Reis Barbosa Filho Utanaan , Duarte Bruno
Published: September 2021

A pandemia trouxe profundas alterações no campo da cultura. O setor cultural enfrenta um enorme desafio com a necessidade de isolamento social, passando por um processo forçado de transição digital. O presente artigo busca compreender as consequências do neoliberalismo sobre as políticas culturais e o mercado de trabalho cultural, analisando a especificidade do impacto da pandemia na cultura da Baixada Fluminense, território periférico na Região Metropolitana do Rio de Janeiro, onde se evidencia o caráter informal e precário das condições de trabalho. Para interpretar o impacto da pandemia no setor cultural, utilizamos dados primários extraídos da pesquisa Impactos da Covid-19 na Economia Criativa, com um recorte específico sobre a precarização do trabalho cultural na Baixada Fluminense.
enunciação de um sujeito competitivo-pacificado:
Authors: Domingues João , Portella Machado Gustavo
Published: September 2021

O presente artigo tem por interesse contribuir para o debate das muitas tensões entre a esfera laboral da cultura no Brasil e o domínio de um governo específico das condutas individuais no neoliberalismo, sendo a ocupação “produtor/a cultural” – concebido hoje como um mediador do mercado profissional de grande porte ou consagrado – seu foco objetivo. Assim, tomamos por análise a Classificação Brasileira de Ocupações, em específico seu catálogo de habilidades e competências sugeridas. Destacamos algumas de suas expectativas, onde procuramos estabelecer uma aparente justaposição com uma nova racionalidade típica do sujeito neoliberal contemporâneo.
transbordamento da atividade musical para as ruas e atualização do trabalho cultural precário
Authors: Oliveira Kyoma Silva
Published: September 2021

Este artigo enseja investigar as condições de trabalho dos músicos instrumentistas que passam a se apresentar nas ruas da cidade do Rio de Janeiro ao longo da última década (2011-2020). Para isso, a partir da retórica sobre a concepção do artista como trabalhador identificada em uma das falas dos músicos entrevistados, são analisadas as condições instáveis de trabalho que levam os músicos a tocarem na rua, bem como a atualização desta instabilidade quando estes passam a desenvolver a atividade musical na cidade. A partir da tríade de conceitos trabalho, espaço e valor, identificamos que a prática musical nômade analisada é estruturada pela lógica da pluriatividade e da instabilidade da força de trabalho, ambas desdobramentos do processo de urbanização neoliberal, que assola a capital carioca nas três décadas.
MEU MESTRE E EU
Authors: Mocarzel Marcelo
Published: September 2021

Homenagem
Equipe Editorial
Authors: Aleph Revista
Published: September 2021

Equipe Editorial
Imunidade do itbi na integralização de capital
Authors: Néas Fillipe Leal Leite
Published: September 2021

Este artigo tem por objetivo o exame da extensão normativa da imunidade tributária do imposto sobre transmissão de bens imóveis sobre operação de integralização de capital com imóvel prevista na Constituição Federal de 1988, com base em pesquisa teórica, para, após breve histórico e aprofundamento no conhecimento da regra-matriz desse imposto, bem como no esclarecimento dessa operação empresarial sob a perspectiva jurídica para, então, pela análise sistemática do direito positivo brasileiro, conhecer o contexto fático e processual de caso paradigmático eleito pelo Supremo Tribunal Federal para solucionar as controvérsias nacionais sobre o tema e, por fim, tecer críticas ao seu julgamento, cuja conclusão reduz sobremaneira o alcance normativo da imunidade tributária.
Analisis Komparatif Produksi Padi Sawah dengan Berbagai Pola Tanam di Kota Palu
Authors: Suditayasa I Made , Antara Made , Christoporus Christoporus
Published: September 2021

Tujuan penelitian ini ialah untuk mengetahui produksi dan perbedaan antara produksi usahatani padi sawah dengan pola tanam padi-padi, tomat-padi dan cabai-padi di Kota Palu.  Penentuan lokasi penelitian dilakukan secara sengaja (purposive). Jumlah sampel dalam penelitian ini sebanyak 30 orang, penentuan sampel dilakukan secara sensus.  Alat analisis data yang digunakan dalam penelitian ini ialah rumus t-hitung (individual Tes).  Hasil analisis uji beda antar pola tanam diketahui bahwa produksi padi sawah pada masing-masing pola tanam menunjukan hasil yang berbeda nyata pada α = 0,05.  Produksi padi sawah pada pola tanam Tomat-Padi mencapai rata-rata 6.8290 Ton/Ha GKP lebih tinggi dari pola tanam Cabai-Padi yang mencapai rata-rata 4.4738 Ton/Ha GKP lebih tinggi dari pada pola tanam Padi-Padi yang mencapai 2.6679 Ton/Ha GKP.
Analisis Strategi Marketing Mix Produk UMKM Kopi Muria di Kabupaten Kudus
Authors: Rahmawati Nilam , Setiadi Agus , Mukson Mukson
Published: September 2021

Kopi merupakan salah satu komoditas pertanian yang mempunyai peluang pasar yang baik. Konsumsi kopi setiap tahun mengalami peningkatan, hal ini menyebabkan tingginya permintaan kopi. Salah satu kopi yang ada di Kabupaten Kudus adalah kopi muria. Tingginya permintaan kopi muria mengharuskan UMKM pengolahan kopi muria menerapkan strategi pemasaran yang tepat. Penelitian ini bertujuan untuk menganalisis faktor internal dan eksternal UMKM kopi muria, menganalisis strategi pemasaran UMKM kopi muria dan menganalisis strategi prioritas UMKM kopi muria. Metode yang digunakan dalam penelitian adalah metode studi kasus. Cara pengambilan sampel menggunakan metode sampling jenuh atau sensus dengan jumlah responden sampai sebanyak 26 UMKM kopi muria. Di samping itu diambil sampel dari pihak  konsumen kopi muria, Dinas UMKM, Dinas pertanian, Lembaga perbankan dan Agen. Metode pengambilan data menggunakan teknik wawwancara dengan bantuan kuesioner, pengamatan langsung, dan dokumentasi. Metode analisis data menggunakan analisis SWOT dan AHP (Analytical hierarchy procces). Hasil dari diagram SWOT menunjukkan bahwa UMKM kopi muria berada pada kuadran I yaitu grow. Matriks IE (Internal – Eksternal) menunjukkan bahwa UMKM kopi muria berada pada posisi tumbuh dan bina. Hasil matriks SWOT dan QSP (Quantitative Strategies Planning) strategi prioritas pertama adalah melakukan penambahan variasi dan inovasi produk. Hasil analisis AHP diperoleh strategi  prioritas yaitu meningkatkan promosi melalui media cetak dan elektronik.
The monotonicity of Darboux and 2-injective functions
Authors: Mortici Cristinel
Published: September 2021

The aim of this work is to establish the monotonicity of a Darboux,
2-injective function
Design and thermal-hydraulic optimization of a shell and tube heat exchanger using bees algorithm
Authors: Bozorgan Navid , Ghafouri Ashkan , Assareh Ehsanolah , Mohammad Safieddin
Published: September 2021

The present study modifies the structural design of a shell-and-tube heat exchanger by considering two key parameters such as the maximization of the overall heat transfer coefficient and minimization of the total pressure drop. Five geometric design variables which include the tube inside diameter, tube outside diameter, pitch size, baffle spacing, and the tube length are investigated for optimization. The governing equations for design and optimization of the shell-and-tube heat exchanger are evaluated and the optimum design parameters are obtained by bees algorithm. The selection of the important design parameters to achieve the proper design is evaluated by fixing each of these parameters, while the other the design parameters are selected as variable to optimize the effectiveness. Compared with the original shell-and-tube heat exchanger, the overall heat transfer coefficient is increased by 22.78% with the minimum increase in the total pressure drop by 1.8%.
Performance investigation of a two-stage thermoelectric cooler with inhomogeneous materials
Authors: Huang Yuewu , Zha Jingjing , Ding Hui
Published: September 2021

A novel model of two-stage thermoelectric cooler with inhomogeneous thermal conductivity in steady-state operating condition is established. The modification of the constant properties model allows controlling the distribution of Joule heat. Considering internal irreversibilities of the thermoelectric cooler, expressions for the cooling capacity, COP, and exergy efficiency are derived. By utilizing numerical methods, the temperature profile along the thermoelectric legs is presented. The optimal operating regions are explored. The COP vs. cooling capacity describing optimal operating regions in inhomogeneity materials are plotted. Meanwhile, the influence of the main parameters such as the variation of thermal conductivity distribution, cold-end temperature and the number of thermoelectric modules on the cooling performance is discussed in detail. Results indicate that the cooling capacity, COP and exergy efficiency are improved compared to those of homo?geneous two-stage thermoelectric coolers when an appropriate inhomogeneous property parameter is applied. The work can provide guidance on design of actual two-stage thermoelectric coolers with inhomogeneous materials.
Improvement of metric for quantification and assessment of the energy justice
Authors: Parovic Miroslav , Kljajic Miroslav
Published: September 2021

This paper provide a qualitative analysis of existing metrics that directly or indirectly quantify energy justice. The main objective of the paper was to determine shortcomings and to suggest improvements in order to enhance existing metrics and create conditions for defining of new energy indicators. The emphasis was placed on the analysis of the energy transition readiness. Therefore, elements of the energy trilemma of the observed countries were defined using known parameters related to the transition processes. The use of known economic, political, energy, environmental, and other indicators provided the universality of the suggested metric and reduced the impact of subjectivity. Proposed improve?ments for the metric of energy justice and the defining of new energy indicators served as a help tool for decision-makers in the energy sector. Political solutions should strive to a balancing of the energy trilemma, which was the main precon?dition for achieving the goals of sustainable development and a just transition. The main results of this paper are the possibility of universal application of metric for the quantification of energy justice and a new composite indicator that indicated the level of energy transition fairness.
Thermal optimization research of oil-immersed transformer winding based on the support machine response surface
Authors: Yuan Fa , Yang Wen , Tang Bo , Wang Yue , Jiang Fa , Han Yi , Huang Li , Ding Can
Published: September 2021

In this paper, the CFD model is established for the low voltage winding region of an oil-immersed transformer according to the design parameters, and the detailed temperature distribution within the region is obtained by numerical simulation. On this basis, the response surface methodology is adopted to optimize the structure parameters with the purpose of minimizing the hot spot temperature. After a sequence of designed experiments, the second-order polynomial response surface and the support vector machine response surface are established, respectively. The analysis of their errors shows that the support vector machine response surface can be better used to fit the approximation. Finally, the particle swarm optimization algorithm is employed to get the optimal structure parameters of the winding based on the support vector machine response surface. The results show that the optimization method can significantly reduce the hot spot temperature of the winding, which provides a guiding direction for the optimal design of the winding structure of transformers.
Heat enhancement analysis in a differentially heated inclined square enclosure with water and ethylene glycol based Al2O3 nanofluid
Authors: Gollapudi Lakshmi , Senanayake Rohan , Georgantopoulou Christina , Singh Anil
Published: September 2021

This paper investigates the analysis of natural-convection heat enhancement in an inclined square enclosure when filled with water-based nanofluids with left edge wall undergoing heating with consistent heat flux while the right edge wall being cold and other remaining walls are kept adiabatic. The parameters used in this analysis include: solid fraction volume (range from 0-20%), length of the heaters (0.25 cm, 0.50 cm, and 1.0 cm from the left edge), and Rayleigh number (range from 104 to 106 ). The nanolayer thickness ratio was kept at a constant value of 1.0 throughout the analysis. The heat source is found at the center of the left wall. Polynomial differential quadrature equations have been adopted for this analysis for various angles range from 0-90?. As the Rayleigh numbers and particle volume fraction got the much-needed raise, the average count of the heat transfer rate improved too. The length of the heat flux heater has become more prominent parameter that has been affecting the calculated temperature and the flow fields. When the heat flux heater length is pushed to an increasing limit, the heat enhancement rate essentially starts to decline. This happens at the smaller inclination angle, though.
Junkyard Planet: Using Stories to Teach Managerial Accounting with a Sustainability Theme
Authors: Grimm Stephanie D.
Published: September 2021

Theme-based learning suggests a relatable theme can make course content more applicable, engaging, and memorable. This article discusses how sustainability was integrated into an accounting class using Adam Minter's (2013) book Junkyard Planet, and smaller stories including cases and discussion boards. The stories introduce students to the role businesses have in influencing sustainable development. The stories allow for the consideration of managerial accounting concepts including direct material costs, the tradeoffs between fixed automation costs and variable labor costs, as well as the exploration of ethics, sustainability and the common good. The assignments reflect the principles of liberal learning, which strive to prepare students for work and life through an integrated curriculum. Survey results document students' interest in sustainability and their perceptions of their understanding of accounting concepts increased following the course. This suggests integrated learning activities can enhance both comprehension of accounting content and students' appreciation for sustainability.
Pedagogical Practices of Accounting Departments Addressing AACSB Technology Requirements
Authors: Sarkar Sumantra , Boss Scott R. , Gray Joy
Published: September 2021

Technology skills are essential for accounting professionals and should be equally important in accounting curricula. Institutions measure technology-related curricular innovations in part through compliance with AACSB Standard A5. We investigate efforts to meet the requirements of Standard A5 by surveying AIS educators from 85 universities to examine efforts to prepare for accreditation review related to technology in accounting curricula. Quantitative results suggest that most institutions feel prepared but also provide some contradictory information that, when combined with qualitative feedback, raises questions about the degree of progress in technology integration. Common issues include widespread lack of increased faculty training, over-reliance on AIS classes to meet accreditation standards, and inclusion of basic spreadsheet and visualization skills as “technology” or “data analytics.” We suggest a pathway to improve accounting pedagogy as it relates to technology through phased curricular changes and issue a call for administrators to support increased accounting faculty technology training.
The Possible Weakening of Financial Accounting from Tax Reforms
Authors: Hanlon Michelle
Published: September 2021

There are past and proposed tax law changes that contain provisions that affect financial reporting. These include calls for book-tax conformity, proposals to increase the links between financial accounting and taxable incomes, and actions by Congress that make direct alterations to U.S. GAAP. I submit that these tax law changes potentially threaten financial reporting quality. I discuss my concerns about why such provisions have not attracted attention from accountants to the extent they should and make a case for more awareness and more research going forward.
Effect of Systemic Hypertension on Peripapillary RNFL Thickness in Patients With Diabetes Without Diabetic Retinopathy
Authors: Lee Min-Woo , Park Gi-Seok , Lim Hyung-Bin , Lee Woo-Hyuk , Kim Min-Su , Lee Young-Hoon , Kim Jung-Yeul
Published: September 2021

Type 2 diabetes mellitus (T2DM) and hypertension (HTN) are both relatively common systemic diseases and cause damage to the retina, such as inner retina reduction and microvascular impairment. The purpose of this study was to identify peripapillary retinal nerve fiber layer (pRNFL) damage by diabetic neurodegeneration and the effects of HTN on the pRNFL thickness in patients with T2DM without clinical diabetic retinopathy. Subjects were divided into three groups: healthy control subjects (group 1), patients with T2DM (group 2), and patients with both diabetes and HTN (group 3). The pRNFL thickness was measured using optical coherence tomography and compared among each group. Linear regression analyses were performed to identify factors associated with pRNFL thickness. A total of 325 eyes were included: 143 eyes in the group 1, 126 eyes in group 2, and 56 eyes in group 3. The mean pRNFL thicknesses of each group were 96.1 ± 7.7, 94.4 ± 8.6, and 91.6 ± 9.6 μm, respectively (P = 0.003). In multivariate linear analyses, diabetes duration (β = −0.236; P = 0.018) and HTN (β = −3.766; P = 0.008) were significant factors affecting the pRNFL thickness in groups 2 and 3. Additionally, the HTN duration was significantly correlated with pRNFL thickness in group 3 (R2 = 0.121; P = 0.008). In conclusion, patients with T2DM with HTN showed thinner pRNFL thickness than those with T2DM only. Additionally, the duration of HTN was significantly correlated with pRNFL thickness in patients with both diabetes and HTN.
A Closer Look at Racial Differences in Diabetes Outcomes Among a Community Sample: Diabetes Distress, Self-care, and HbA1c
Authors: Helgeson Vicki S. , Naqvi Jeanean B. , Korytkowski Mary T. , Gary-Webb Tiffany L.
Published: September 2021

OBJECTIVE

Approximately 34 million people in the U.S. have diabetes. With this illness come substantial changes to psychological and physical health. However, type 2 diabetes disproportionately affects non-Hispanic Black compared with non-Hispanic White populations. The purpose of this study was to examine racial differences in psychological, behavioral, and physical health over time among individuals recently diagnosed with type 2 diabetes.

RESEARCH DESIGN AND METHODS

Data were collected from a community sample of 193 adults recently diagnosed with type 2 diabetes (44% female; 45% Black). Measures of distress, self-care behaviors, and HbA1c were taken at an initial interview (time 1) and 6 months later (time 2). Individuals wore an Actical accelerometer to assess physical activity and participated in three 24-h dietary recall interviews to assess dietary intake within 2 weeks of the initial interview.

RESULTS

From time 1 to time 2, Black women showed the highest increase in depressive symptoms. There was a greater increase in regimen and physician distress among White compared with Black participants. White men and Black women reported a decline in medication adherence over time. There were no racial differences in changes in physical activity across 6 months. However, Black individuals had higher overall calorie consumption with greater protein, saturated fat, and cholesterol intake than White individuals. There were no race or sex differences in changes in glycemic stability.

CONCLUSIONS

Initial adjustment to a diagnosis of type 2 diabetes differentially influences Black and White men and women in terms of depressive symptoms, diabetes distress, and self-care.
Early Menopause and Cardiovascular Disease Risk in Women With or Without Type 2 Diabetes: A Pooled Analysis of 9,374 Postmenopausal Women
Authors: Yoshida Yilin , Chen Zhipeng , Baudier Robin L. , Krousel-Wood Marie , Anderson Amanda H. , Fonseca Vivian A. , Mauvais-Jarvis Franck
Published: September 2021

OBJECTIVE

Early menopause may be
associated with higher cardiovascular disease (CVD) risk. Type 2 diabetes (T2DM),
coupled with early menopause, may result in even greater CVD risk in women.
We
examined CVD risk in women with early compared to normal-age menopause, with
and without T2DM overall and by race/ethnicity.

RESEARCH DESIGN AND METHODS

We pooled data from the
Atherosclerosis Risk in Communities Study, the Multi-Ethnic Study of
Atherosclerosis, and the Jackson Heart Study. We included women with data on
menopausal status, menopausal age, and T2DM, excluding pre- or peri-menopausal
women, and those with prevalent CVD. Outcomes included incident coronary heart
disease (CHD), stroke, heart failure (HF), and atherosclerotic cardiovascular
disease (ASCVD; CHD or stroke). We estimated the risk associated with early
(<45 years) compared to normal-age menopause using Cox proportional hazards models.
Covariates included age, race/ethnicity, education, body mass index, blood
pressure, cholesterol, smoking, alcohol consumption, antihypertensive
medication, lipid-lowering medication, hormone therapy use, and pregnancy
history.

RESULTS

We included 9,374 postmenopausal
women for a median follow-up of 15 years. We observed 1,068 CHD, 659 stroke, 1,412
HF and 1,567 ASCVD events. T2DM
significantly modified the effect of early menopause on CVD risk.
Adjusted HRs for early menopause and the outcomes were greater in women with T2DM
versus without (CHD 1.15, 1.00-1.33 vs 1.09, 1.03-1.15; stroke 1.21, 1.04-1.40 vs
1.10, 1.04-1.16; ASCVD 1.29, 1.09-1.51 vs 1.10, 1.04-1.17; HF 1.18, 1.00-1.39
vs 1.09, 1.03-1.16)). The modifying effect of T2DM on
the association between early menopause and ASCVD was only statistically
significant in black compared to white women.

CONCLUSION

Early menopause was associated
with increased risk for CVD in postmenopausal women. T2DM may further augment
the risk, particularly in black women.
Hepatocytic activating transcription factor 3 protects against steatohepatitis via hepatocyte nuclear factor 4
Authors: Xu Yanyong , Hu Shuwei , Jadhav Kavita , Zhu Yingdong , Pan Xiaoli , Bawa Fathima Cassim , Yin Liya , Zhang Yanqiao
Published: September 2021

Activating transcription factor
3 (ATF3) has been shown to play an important role in HDL metabolism, yet the
role of hepatocytic ATF3 in the development of steatohepatitis remains elusive.
Here we show that adeno-associated virus-mediated over-expression of human ATF3
in hepatocytes prevents diet-induced steatohepatitis in C57BL/6 mice and
reverses steatohepatitis in db/db mice. Conversely, global or hepatocyte-specific
loss of ATF3 aggravates diet-induced steatohepatitis. Mechanistically, hepatocytic
ATF3 induces hepatic lipolysis and fatty acid oxidation and inhibits inflammation
and apoptosis. We further show that hepatocyte nuclear factor 4a
(HNF4a) is required for ATF3 to improve steatohepatitis.
Thus, the current study indicates that ATF3 protects against steatohepatitis through,
at least in part, hepatic HNF4a.
Targeting hepatic ATF3 may be useful for treatment of steatohepatitis.
Right to Access to Information and the Issue of Ensuring Environmental Security in Vietnam
Authors: Thai Luu Quoc
Published: September 2021

— In the present day, environmental security is a global issue. For this reason, Vietnam has also formally stipulated the issue of “environmental security” in the Law on Environmental protection 2014. One of the important requirements for effective environmental protection, ensuring environmental security is the effective implementation of information publicization as well as the right to access to information related to environment of people in a society. However, in the Vietnamese Law on Environmental Protection 2020 (effective from January 1, 2022 replacing the Law on Environmental Protection 2014), the concept of “environmental security” no longer exists and many regulations on Environmental information disclosure has also been changed. This raises doubts about the ability to access information to protect environmental security in the near future. Therefore, this article will analyze the provisions of current Vietnamese Environment law on the issue of access to information in relation to ensuring environmental security in Vietnam. At the same time, the article also provides a preliminary assessment of relevant new regulations to contribute to the improvement of the law on access to environmental information in Vietnam.
Possible Link Between Climate Change and Extraordinary Wildfires in Australia, the Amazon and Western United States
Authors: M. Brajkovic  , T. Carter  , C. Cook  , A. Pourmovahed
Published: September 2021

Areas with dry climates have recently become more vulnerable to wildfires as the soil and air moisture have been changing because of greenhouse gasses in the atmosphere. Areas especially impacted are Australia, the Amazon, and western United States. The common factors at these locations are a dry environment and brush or forests fueling the fires once they start. As the climate continues to change, less moisture is present in the ground in these areas. This proliferates the susceptibility to wildfire. Prevention methods for inhibiting wildfires include reducing our carbon footprint, using care around campfires and other causes of wildfire, as well as routine thinning and removal of excess vegetation. The purpose of this study was to determine whether there is a link between Climate Change and the extraordinary magnitude, intensity, and frequency of recent wildfires. Although it is not possible to link all these wildfires directly and undeniably to Climate Change, the data examined clearly point to a strong possibility that such a link exists
Incentives for Renewable Energies in Colombia
Authors: F. Villada  , J.D. Saldarriaga-Loaiza  , J.M. López-Lezama
Published: September 2021

This work analyses the potential effects of the incentives for renewable energies approved in Colombia by two main acts. A methodology involving adjustments for tax reductions and accelerated depreciation is used to evaluate the Levelized Cost of Electricity (LCOE) for the four main clean energy resources available in Colombia. The results show important reductions in the LCOE specially, under the act approved in the development plan of the new government, where the LCOE of three technologies is below the grid parity.
Positive effects of the migration from Ka-band satellite to 4G solution for the communication needs of a scattered set of 1 MW solar farms in Poland: A user’s experience
Authors: Enrique Tébar PhD  , Luis Hurtado  , Witold Bąk  , Zbigniew Kulesza M.Sc. Eng  , Andrzej Napieralski Prof
Published: September 2021

This paper contains a concise overview of the deployment of scattered solar power plants across Poland, mainly from the perspective of their communication networks, and how the recent development of the Polish 4G networks has a very positive impact for the performance of the whole monitoring system (production control and video-surveillance), with a special emphasis on video-analytics, due to its higher bandwidth demand. All the information will be shown from the point of view of the solar photovoltaics developer I+D Energías, and therefore it constitutes a real user’s experience.
Positive effects of the migration from Ka-band satellite to 4G solution for the communication needs of a scattered set of 1 MW solar farms in Poland: A user’s experience
Authors: J. Baptista  , P. Vargas  , J. R. Ferreira
Published: September 2021

In the last few decades, the vast majority of world states have faced increased energy consumption using more environmentally friendly production technologies. The use of traditional renewable energies like hydro, wind and solar has been the solution found. Despite this, new technical solutions and strategies are beginning to emerge, of which Floating Solar Photovoltaic (FSPV) systems are part. In this framework, southern European countries have excellent climate conditions for reinforcing the use of solar energy. This research assess the existing Portuguese potential for floating PV systems and its integration in the power grid. A floating solar power plant of 1MW in Gouvães dam included in the Tâmega hydroelectric complex, under construction in northern Portugal was sizing and evaluated its energy potential. A techno-economic feasibility study was also carried out taking into account the current investment costs and energy tariffs in the Iberian liberalized market. This integrated analysis allowed to obtain important results on the current state of the art, types of technologies available, their costs and the payback period for this type of projects.
Optimal Allocation of Multiple Distributed Generations including Uncertainties in Distribution Networks by k-Means Clustering and Particle Swarm Optimization Algorithms
Authors: Onur Hakkı Eyüboğlu  , Ömer Gül
Published: September 2021

Climate change is the one of the most important issues faced globally and reasons of it must be reduced immediately in every area. Installing distributed power generation (DG) is one of the powerful options for reducing carbon emissions in power generation. However, improper allocation of these assets has several drawbacks. Efficient, novel and robust algorithm which is combination of both k-Means clustering and Particle Swarm Optimization is proposed in order to allocate DGs. Proposed algorithm clusters distribution network buses and selects to most proper cluster to allocate DG in this way it reduces possible buses. Furthermore, sizing and generation constraints of DGs are quite important for allocation. Therefore, several cases including different DG sizes and types are implemented to obtain the best results. Moreover, multiple DG cases are included in the study. Finally, DGs have considered as wind turbines for best cases and cases have analysed in 24 hourly bases including uncertainties both demand and production side. 33 Bus test feeder power losses are reduced up to 69%, 86%, 90% at best cases and 39%, 53%, 55% at including uncertainties by proposed algorithm for cases 1, 2, 3 DG installed, respectively.
Investigation on Using Low Voltage Automatic Regulation to Minimize the Impacts of Charging Plug-in Electric Vehicles in Distribution Systems
Authors: Priscila Costa Nascimento  , Michel Girotto de Oliveira  , José Carlos M. Vieira
Published: September 2021

The growth of micro and mini distributed generation and, more recently, the use of electric energy storage systems and the incentives for electric mobility are important examples of the transformations that distribution networks have been going through. In this context, this paper firstly presents the impacts of uncoordinated plug-in electric vehicles (PEVs) charging in a real Brazilian distribution system. Four scenarios were elaborated with different PEVs penetration levels and the results show increased voltage unbalance, system losses, and violations of the steady-state voltage limits, even in the presence of an automatic voltage regulator installed in the medium voltage network. Then, as the main contribution, the potential usage of automatic voltage regulation at the low voltage network was investigated to minimize the negative impacts of uncontrolled PEV charging on distribution system steady-state operation. It is important to highlight that this is not a common practice of utilities in Brazil. The obtained results showed that regulating the voltage at the low voltage side could be an effective solution to keep the voltages within statutory limits.
High energy-efficient electrical drive with multilevel inverter and wide-bandgap power semiconductors
Authors: R. Mecke
Published: September 2021

Multilevel inverters are an alternative for electrical drives with DC link voltage between 560 and 750 V. In this voltage range new wide-bandgap power switches (SiC MOSFET, GaN FET) are available. The paper analyses three-, four-, five- and seven-level inverters. A simulation model of the drive system, including the 11 kW induction motor and motor filter is developed. By replacing IGBTs with SiC FETs, the two-level inverter achieved a loss reduction of 59 % at 25 °C and 150 °C at nominal motor operation point. By using the five-level inverter with GaN FETs, a further loss reduction of 9 % only at low junction temperature is possible. With a higher number of inverter levels, the size of the motor filter can be reduced. With five inverter levels and 40 kHz switching frequency volume and weight can be reduced by 86 % and 78 % respectively. The overall efficiency of the drive system achieves 98.5 % at 25 °C and 98.1 % at 150 °C. Compared to the state of the art (two-level with IGBTs with 5 kHz), this is an improvement of 2.1 % at 25 °C and 2.7 % at 150 °C.
Study the Possibility of Implementing a Solar Chimney Power Plant in Algeria (Case study: Constantine)
Authors: S. Djimli  , A. Chaker  , T.E. Boukelia  , A. Ghellab  , A. Bouraoui
Published: September 2021

This work offers the opportunity to consider the possibility of realizing a solar chimney power plant in the region of Constantine (Algeria). This region is characterized by its important solar radiation resource and ambient temperature. Based on actual measurements of Constantine weather station for the period of April 2020, the performance analysis of a solar chimney which have three times the dimensions of the Manzaneres prototype (Spain) is carried out using of Fluent software. The obtained results show that when the dimensions of the solar chimney are large, the impact of small changes in solar irradiation is negligible. Also, the studied power plant with dimensions of; 584 m height, a diameter of 30 m and a collector diameter of 732 m is capable of producing a monthly average of 72 to 296 MW of electrical energy, this energy production would be sufficient to meet the needs of rural areas located in this region.
Three-Phase Transformerless Inverter for Photovoltaic Grid Connected System with Zero Common Mode Noise
Authors: K. Karam  , M. Badawi El Najjar  , M. El Hassan
Published: September 2021

The pervasion of transformerless grid connected photovoltaic (PV) inverters has triggered the concerns of many researchers since it can induce power quality problems. In these types of applications, the generation of common mode (CM) leakage current is one of the major factors that affects the reliability of the overall design. In single-phase systems, the concept of the common ground between the PV negative terminal and the neutral point of the grid is the only topology that “totally” cancels this CM noise. However, none of the existing three-phase inverter techniques is able to totally remove it. Therefore, this paper proposes a three-phase PV inverter based on the concept applied in the single-phase system in order to achieve, for the first time, a zero CM noise in three-phase grid-connected PV applications. The proposed inverter is simulated with a PV array, appropriate modulation technique, corresponding inverter controller, and a three-phase Y-connected alternating current (AC) grid voltage. The simulation of the overall system is done using Matlab/Simulink software. As compared with results of existing three-phase topologies, this is the only three-phase transformerless PV inverter technique that offers generation of multilevel output, total elimination of leakage current flow, simple inverter structure, and uncomplicated modulation technique
Design of Power Quality Virtual Lab Toolbox using LabVIEW/Multisim
Authors: S. Haidar  , E. Moussa  , M. El Hassan  , M. Badawi El Najjar
Published: September 2021

This paper presents a Power Quality (PQ) virtual lab that can be used by electrical engineers (EE) to enhance their knowledge and awareness on power quality disturbances in accordance to power quality standards. It will offer the EE the facility to become more aware about the problems tackling power systems and nonlinear devices, and their effects on the power quality indices. This work is built using NI LabVIEW/Multisim and is composed out of many simulations and experiments each with its learning objectives. The established measured power quality indices are mainly the root mean square (RMS), the total harmonic distortion (THD), the distortion index (DIN), the telephone influence factor (TIF), the crest factor (CF), the voltage transformer product (VT), the current transformer product (IT), the displacement power factor (DPF), the true power factor (TPF) and the unbalance factor (UF). Each of these indices is measured and analyzed in order to check how they are affected by the PQ issues.
A Centralized Shifted Voltage Control Method for Accurate Power Sharing in DC Islanded Microgrids
Authors: Minh-Duc Pham  , Hong-Hee Lee
Published: September 2021

Due to line impedance mismatch among renewable energy sources (RESs), it is hard to realize accurate power sharing in the DC microgrid system. To solve this issue, a distributed power sharing strategy for adjusting the RES output voltage is developed by adding shifted output voltage into each local controller. Thanks to the shifted voltage, the influence of voltage drop caused by the droop controller is effectively mitigated, so that the DC bus voltage is constantly balanced regardless of the load changes. The proposed method is realized with a centralized approach, and all the required control variable to determine the reference voltage is transmitted through low-bandwidth communication. The controller design and system stability are analyzed in detail with a simplified microgrid model. Small-scale DC microgrid is simulated to verify the effectiveness of the centralized shifted voltage control method.
Energy design and experimental evaluation of an industrial burner to natural gas
Authors: Ph.D. Freddy J. Rojas  , Fernando Jimenez  , B.Sc. Luis Napan
Published: September 2021

This research is focused on the design and experimental evaluation of a high-power industrial burner supplied by natural gas at an operating pressure of 23 mbar, based on improving thermal efficiency with a variation in geometric parameters. The specific objectives of the work were the following: Define the calculation procedure to establish the geometric characteristics of the burner, determine the thermal efficiency define a test procedure for the tests of thermal efficiency and finally analyse the data obtained from the power, thermal efficiency, and fuel consumption of the designed burners. This investigation will be preliminarily presented for a three-part burner.
Technical and economic feasibility study of a solar plant on a commercial surface in Azogues, Ecuador.
Authors: I. Bermeo  , L. Matute  , E. Barragán-Escandón  , X. Serrano-  Guerrero  , E. Zalamea-León
Published: September 2021

The submitted paper deals with the shopping mall project that will be supplied with solar power. The selected location was "La Playa Store" shopping center located in the city of Azogues, south of Ecuador. This type of building has at least two characteristics worth studying i) the available surface on the roof, ii) the characteristics of the energy demand curve. This evaluation process establishes the energy requirement of the installation; that is, the energy potential available depending on the surface of its roof, to design a solar plant according to international standards and local ARCONEL 003/18 regulations. The tools used for the involving simulation were the Lumion software, an IFC file created and imported into the Solarius Pv energy simulator, a software specialized in the design of photovoltaic systems. The designed photovoltaic system has a projected annual energy generation of 9,3695.26 kWh; an installed price per watt of $1.1 with viable results at the end of the fifth year of implementation with an IRR of 7.33% and NPV of $390.51. As this is a commercial facility, a constant and flat consumption throughout the day is expected, so implementing solar energy would reduce the actual power requirements by 32.63%
The Fault Detection of Gears of Electromechanical Power Transmission System using Frequency Domain Approach
Authors: Alwadie. A  , Muhammad Irfan  , Nordin Saad
Published: September 2021

Electric motors are widely used in the industry and convert electrical power to mechanical power. Gears are connected with the motor shaft for frictionless power transmission. The power transmission efficiency is dropped when the gear teeth is damaged. It causes huge financial loss. There are various commercially available condition monitoring tools for the preventive maintenance and condition monitoring of the gearing systems. However, such tools and techniques are intrusive and costly. This paper presents a non-intrusive approach for timely detection of gear damages and can be integrated to existing condition monitoring systems to save time and cost. The proposed method is based on the analysis of power spectra of the frequency amplitude plots. The amplitude difference at gear harmonics gives indication of the presence of the fault. The proposed technique has been tested and validated at 1400 rpm and 1370 rpm of the motor which is operating at 75 % load and full load.
A review on the integration between urban and energy planning considering the planning tools
Authors: L. F. C. Castro  , B. B. Freitas  , P. C. M. Carvalho
Published: September 2021

The increasing energy demand is a global concern, directly associated with indicators of greenhouse gases and air pollution. These, in turn, are directly related to the physical, social and economic aspects of cities. One way to minimize such impacts is to diversify the energy matrix with renewable sources. On the other hand, the use of wind and solar plants are susceptible to multiple conflicts, due to urban aesthetics, technology scale or directionality of the energy flow across individual property limits. Considering that the urban form directly impacts the energy demand and the existence of conflicts arising from the use of renewable sources, the integration between urban and energy planning plays an important role in mitigating the risks associated with the growth of renewable generation. With such motivation, we propose a comparative analysis of the main tools of urban and / or energy planning through a systematic review of the literature. The methodology of the literature review and the results are presented through a table with the evaluated functionalities: Scenarios, simulations, energy conditioning, integration with GIS systems and ability to integrate with cities master plans.