bluuebunny/crossref_metadata_2025 huggingface dataset:
Assessing potential effects of oil and gas development activities on groundwater quality near and overlying the Elk Hills and North Coles Levee Oil Fields, San Joaquin Valley, California
Authors: Warden John G. , Landon Matthew K. , Stephens Michael J. , Davis Tracy A. , Gillespie Janice M. , McMahon Peter B. , Kulongoski Justin T. , Hunt Andrew G. , Shimabukuro David H. , Gannon Riley S. , Ball Lyndsay B.
Published: August 2024

Groundwater resources are utilized near areas of intensive oil and gas development in California’s San Joaquin Valley. In this study, we examined chemical and isotopic data to assess if thermogenic gas or saline water from oil producing formations have mixed with groundwater near the Elk Hills and North Coles Levee Oil Fields in the southwestern San Joaquin Valley. Major ion concentrations and stable isotope compositions were largely consistent with natural processes, including mixing of different recharge sources and water-rock interactions. Trace methane concentrations likely resulted from microbial rather than thermogenic sources. Trace concentrations of benzene and other dissolved hydrocarbons in three wells had uncertain sources that could occur naturally or be derived from oil and gas development activities or other anthropogenic sources. In the mid-1990s, two industrial supply wells had increasing Cl and B concentrations likely explained by mixing with up to 15 percent saline oil-field water injected for disposal in nearby injection disposal wells. Shallow groundwater along the western margin of Buena Vista Lake Bed had elevated Cl, B, and SO4 concentrations that could be explained by accumulation of salts during natural wetting and drying cycles or, alternatively, legacy surface disposal of saline oil-field water in upgradient ephemeral drainages. This study showed that groundwater had relatively little evidence of thermogenic gas or saline water from oil and gas sources in most parts of the study area. However, the evidence for groundwater mixing with injected disposal water, and possibly legacy surface disposal water, demonstrates produced water management practices as a potential risk factor for groundwater-quality degradation near oil and gas fields. Additional studies in the San Joaquin Valley and elsewhere could improve understanding of such risks by assessing the locations, volumes, and types of produced water disposal practices used during the life of oil fields.
Washout-parametric imaging with Sonazoid for enhanced differentiation of focal liver lesions
Authors: Kakegawa Tatsuya , Sugimoto Katsutoshi , Kamiyama Naohisa , Hashimoto Hiroshi , Takahashi Hiroshi , Wada Takuya , Yoshimasu Yu , Takeuchi Hirohito , Nakayama Ryohei , Sakamaki Kentaro , Itoi Takao
Published: August 2024

Purpose: The study aimed to compare the diagnostic performance of washout-parametric imaging (WOPI) with that of conventional contrast-enhanced ultrasound (cCEUS) in differentiating focal liver lesions (FLLs).Methods: A total of 181 FLLs were imaged with contrast-enhanced ultrasound using Sonazoid, and the recordings were captured for 10 minutes in a prospective setting. WOPI was constructed from three images, depicting the arterial phase (peak enhancement), the early portal venous phase (1-minute post-injection), and the vasculo-Kupffer phase (5 or 10 minutes post-injection). The intensity variations in these images were color-coded and superimposed to produce a single image representing the washout timing across the lesions. From the 181 FLLs, 30 hepatocellular carcinomas (HCCs), 30 non-HCC malignancies, and 30 benign lesions were randomly selected for an observer study. Both techniques (cCEUS and WOPI) were evaluated by four off-site readers. They classified each lesion as benign or malignant using a continuous rating scale, with the endpoints representing "definitely benign" and "definitely malignant." The diagnostic performance of cCEUS and WOPI was compared using the area under the receiver operating characteristic curve (AUC) with the DeLong test. Interobserver agreement was assessed using the intraclass correlation coefficient (ICC).Results: The difference in average AUC values between WOPI and cCEUS was 0.0062 (95% confidence interval, -0.0161 to 0.0285), indicating no significant difference between techniques. The interobserver agreement was higher for WOPI (ICC, 0.77) than cCEUS (ICC, 0.67).Conclusion: The diagnostic performance of WOPI is comparable to that of cCEUS in differentiating FLLs, with superior interobserver agreement.
Valvular Endocarditis and Biventricular Heart Failure in the Setting of Tropheryma whipplei Disease
Authors: Ergi Defne Gunes , Fadel Hind J. , Michelena Hector I. , Lin Grace , Greason Kevin L. , Arghami Arman
Published: August 2024

Whipple disease is a rare systemic illness associated with weight loss, diarrhea, and arthralgia. Asymptomatic carriage is common, but the disease can be complicated by cardiac involvement and may result in culture-negative endocarditis. Cardiac manifestations of the disease can lead to death. This report presents the case of a 66-year-old man with Whipple disease and biventricular heart failure with cardiogenic shock. Medical therapy followed by successful replacement of the aortic and mitral valves resulted in substantial improvement.
ANALISIS PENGUKURAN KAPASITOR BANK DENGAN TUNED REACTOR PADA GEDUNG ATRIA RESIDENCES GADING SERPONG
Authors: Nadeak David Ryanto , Lisapaly Leonard , Sinambela Rismen , Manik Martua
Published: August 2024

Penggunaan beban nonlinier terus meningkat dalam jaringan sistem kelistrikan pada suatu gedung yang telah menarik perhatian untuk memahami sifat harmonik dan teknik mitigasinya. Kapasitor dengan tuned reactor digunakan untuk membantu menjaga faktor daya yang dipasang di lingkungan yang kaya akan harmonik. Oleh karena itu, untuk mengurangi dampak buruk harmonisa dan memastikan bahwa mesin beroperasi dan dipelihara dengan benar, perlu dilakukan penelitian. Alat ukur Hioki 3198 digunakan untuk mengukur arus, tegangan, faktor daya, harmonisa (THD), dan ukuran lain seperti kandungan harmonisa arus dan tegangan. Selanjutnya, data yang diperoleh dianalisa menggunakan metode kuantitatif. Hasil penelitian menunjukkan bahwa nilai  mendekati batas standar pada fasa T dan melewati standar pada fasa S dimana dari perhitungan standar didapat range yang diperbolehkan adalah sebesar 15% sedangkan hasil yang didapat dari pengukuran sudah mendekati standar. Untuk faktor daya, batas standar yang diperbolehkan yaitu ≥ 85% sedangkan yang terukur yaitu kisaran -0,6% hingga -0,9%.
The Tomb of the Rings and the Tomb of the Linen. New Data for a Late Etruscan Community in the Middle Valley of the Ombrone River (Civitella Paganico – Italy)
Authors: Sebastiani Alessandro , De Pari Marta , Vanni Edoardo
Published: August 2024

The paper describes the discovery of two late Etruscan burials at Podere Cannicci (Civitella Paganico, GR) and their significance within the broader territory of this part of Etruria.
Quasi-triangular, factorizable Leibniz bialgebras and relative Rota–Baxter operators
Authors: Bai Chengming , Liu Guilai , Sheng Yunhe , Tang Rong
Published: August 2024

We introduce the notion of quasi-triangular Leibniz bialgebras, which can be constructed from solutions of the classical Leibniz Yang–Baxter equation (CLYBE) whose skew-symmetric parts are invariant.
In addition to triangular Leibniz bialgebras, quasi-triangular Leibniz bialgebras contain factorizable Leibniz bialgebras as another subclass, which lead to a factorization of the underlying Leibniz algebras.
Relative Rota–Baxter operators with weights on Leibniz algebras are used to characterize solutions of the CLYBE whose skew-symmetric parts are invariant.
On skew-symmetric quadratic Leibniz algebras, such operators correspond to Rota–Baxter type operators.
Consequently, we introduce the notion of skew-symmetric quadratic Rota–Baxter Leibniz algebras, such that they give rise to triangular Leibniz bialgebras in the case of weight 0, while they are in one-to-one correspondence with factorizable Leibniz bialgebras in the case of nonzero weights.
Neyman meets causal machine learning: Experimental evaluation of individualized treatment rules
Authors: Li Michael Lingzhi , Imai Kosuke
Published: August 2024

A century ago, Neyman showed how to evaluate the efficacy of treatment using a randomized experiment under a minimal set of assumptions. This classical repeated sampling framework serves as a basis of routine experimental analyses conducted by today’s scientists across disciplines. In this article, we demonstrate that Neyman’s methodology can also be used to experimentally evaluate the efficacy of individualized treatment rules (ITRs), which are derived by modern causal machine learning (ML) algorithms. In particular, we show how to account for additional uncertainty resulting from a training process based on cross-fitting. The primary advantage of Neyman’s approach is that it can be applied to any ITR regardless of the properties of ML algorithms that are used to derive the ITR. We also show, somewhat surprisingly, that for certain metrics, it is more efficient to conduct this ex-post experimental evaluation of an ITR than to conduct an ex-ante experimental evaluation that randomly assigns some units to the ITR. Our analysis demonstrates that Neyman’s repeated sampling framework is as relevant for causal inference today as it has been since its inception.
On Gluck’s conjecture for wreath product type groups
Authors: Meng Hangyang , Guo Xiuyun
Published: August 2024

A well-known conjecture of Gluck claims that

|
G
:
F

(
G
)

|

≤
b

(
G
)

2

\lvert G:\mathbf{F}(G)\rvert\leq b(G)^{2}

for all finite solvable groups 𝐺, where

F
⁢

(
G
)

\mathbf{F}(G)

is the Fitting subgroup and

b
⁢

(
G
)

b(G)

is the largest degree of a complex irreducible character of 𝐺.
In this paper, we prove that Gluck’s conjecture holds for all wreath product type groups of the form

G
≀

H
1

≀

H
2

≀
⋯
≀

H
r

G\wr H_{1}\wr H_{2}\wr\cdots\wr H_{r}

, where 𝐺 is a finite solvable group acting primitively on

F
⁢

(
G
)

/
Φ

⁢

(
G
)

\mathbf{F}(G)/\Phi(G)

, and each

H
i

H_{i}

is a solvable primitive permutation group of finite degree.
Organizing Integration of Refugees: Translation and Hybridization
Authors: Diedrich Andreas , Czarniawska Barbara
Published: August 2024

How is integration organized in practice, and what role do hybrids play in such practices? Based on fieldwork on two integration support initiatives for recent refugees in one of Sweden’s largest cities, this paper critically engages these questions, focusing in particular on integration as a multi-directional, ambiguous process that is shaped by the intervention of a great many agents. In line with previous research, we conclude that practices of integration require collaboration between many humans and non-humans, while at the same time we question many of the assumptions about who should collaborate with whom and who should receive support if the integration is to succeed. We also discovered that “integration” is a kind of boundary word, which is translated differently by different actors, but nevertheless facilitates various forms of collaboration and coordination. Some see it as a step toward assimilation, others as a step toward hybridization. If, as is claimed by many scholars, hybridization is an unavoidable result of modernization, it will most likely prevail.
Hybrid solar drying of sludge from kraft pulp mills
Authors: Gonçalves Lindomar Matias , Mendoza-Martinez Clara , Nuncira Jesús , Rocha Elém Patrícia Alves , de Paula Eduardo Coutinho , Cardoso Marcelo
Published: August 2024

Sludge generated from kraft pulp mill wastewater treatment plants (WWTPs) is typically non-inert solid waste and is commonly disposed of in landfills. In this study, a novel approach for repurposing WWTP sludge from a kraft pulp mill in Brazil for energy generation was assessed. With the global cellulose market projected to reach $ 61 billion by 2033, there is a growing need for sustainable energy solutions and disposal of associated industrial byproducts. This study investigated the performance of a hybrid active solar dryer for reducing the moisture content of sludge to enhance the feasibility of sludge burning in a biomass boiler. Through rigorous experimentation and design of experiments (DOE) planning, optimal parameters for the hybrid dryer were determined, specifically, a volumetric airflow rate of 1.1 m/s and an entrance temperature of approximately 51 °C. This innovative approach not only addresses the environmental concerns associated with sludge disposal, but also contributes to the broader goal of advancing sustainable technologies in the midst of global energy challenges.
Carbon-based nanomaterials: synthesis, types and fuel applications: a mini-review
Authors: Sajid Muhammad , Iram Ghazala , Nawaz Aqsa , Qayyum Wajeeha , Farhan Ahmad , Qamar Muhammad Azam , Nawaz Haq , Shahid Asma
Published: August 2024

Carbon is one of the most abundant minerals in the universe. The world’s energy needs are being unmet due to the exponential rise in population. Since its inception 20 years ago, carbon and its allotropes, including fullerenes, carbon nanotubes, and graphene, have been marketed as potential energy storage and generation materials. By solving important issues like accumulation and inadequate thermodynamic compatibility, carbon fiber, expanded graphite, and carbon nanotubes are promising functional materials that can be used to improve the performance of bipolar plates further. There are several potential uses for carbon-based nanomaterials (CBNMs) in the energy area. This mini-review provides an overview of the synthetic routes employed for producing CBNMs, categorizing them based on their types, elucidating their diverse applications in fuel energy systems, and emphasising the uses of CBNMs in energy. The advantages and disadvantages of several synthetic processes have been examined and compared. The types of CBNMs, like carbon nanotubes, graphene, carbon dots, and fullerenes, are explored in terms of their unique structural properties and fabrication methods. Furthermore, the utilization of CBNMs in fuel energy systems, such as fuel cells, energy storage devices, and catalysis, is comprehensively reviewed.
Laser Speckle Photometry for Inline Defect Detection in Solder Connections of Power Electronics
Authors: Surner Lennard , Chen Lili , Bendjus Beatrice , Gerlach Gerald , Schuh Jannis
Published: August 2024

Bei der Herstellung von Leistungselektronik ist die Qualität und Zuverlässigkeit ein wichtiger Faktor. Vor allem die Verbindungsschicht zwischen dem Chip und dem keramischen Substrat weist häufig Defekte auf, die die Wärmeableitung in diesen Bereichen verringern können. Dies kann zu einer Überhitzung führen und die Lebensdauer des Bauteils verringern. Im schlimmsten Fall können solche Fehler große Auswirkungen auf sicherheitsrelevante Systeme haben. Daher ist eine Qualitätskontrolle innerhalb der Produktionslinie bzw. vor der Verpackung der Bauteile sehr wichtig. Die Laser-Speckle- Photometrie (LSP) bietet eine vielversprechende Lösung für dieses Problem. Speckle-Muster werden durch interferierende Lichtwellen erzeugt, die von der beleuchteten Oberfläche reflektiert werden. Das Verhalten dieser Muster ist eng mit dem Oberflächenzustand der untersuchten Proben verbunden. In diesem Beitrag wird ein auf der LSP basierendes Qualitätskontrollkonzept für den Produktionsprozess von Leistungselektronik-Chips für die Automobilindustrie vorgestellt. Ziel ist es, die Hohlräume in der Lötverbindung zu finden und zu bewerten und darüber hinaus die Porosität in gesinterten Verbindungen zu bestimmen. Insbesondere die Größe und Lage dieser Hohlräume sind von großem Interesse. Erste Untersuchungen haben vielversprechende Ergebnisse gezeigt und Defekte mit einer Größe von weniger als 15 % (v/v) der eigentlichen Verbindungsschicht gefunden. Dies beweist, dass die LSP ein vielversprechender Ansatz zur Überprüfung der Verbindungsqualität von Chips bei der Herstellung von Leistungselektronik ist.
Task-specific scan trajectory modification for dimensional X-ray computed Tomography with high throughput
Authors: Butzhammer Lorenz , Hausotte Tino
Published: August 2024

Eine Erweiterung der Scantrajektorie für die industrielle Röntgen-Computertomographie von einer kreisförmigen Form (entsprechend einer 360°-Rotation des Messobjekts) hin zu frei wählbaren Aufnahmeposen hat das Potenzial, durch eine geeignete Trajektorienanpassung Messabweichungen zu reduzieren. In diesem Beitrag wird eine solche Trajektorienanpassung durch einen Hexapoden als Messobjektmanipulator und eine güteparameterbasierte Methodik zur Wahl einzelner Trajektorienpunkte erreicht. Die Ergebnisse zeigen, dass sich vor allem für eine geringe Projektionszahl signifikante Vorteile ergeben, was vor allem im Hinblick auf Inline-CT mit hohem Durchsatz von Relevanz ist.
Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens
Authors: Dreiling Dmitrij , Itner Dominik , Gravenkamp Hauke , Birk Carolin , Henning Bernd
Published: August 2024

Im Folgenden wird ein wellenleiterbasierter Ansatz zur Bestimmung von viskoelastischen Materialparametern für eine numerische Simulation der Schallausbreitung in transversal isotropen Polymeren vorgestellt. Ein hierfür entwickeltes Puls-Echo-Messverfahren liefert Messsignale, welche anschließend zur Schätzung der Materialparameter von absorbierenden, zylindrischen Polymerproben genutzt werden. Darüber hinaus kommen in dem Messaufbau Schallwandler zum Einsatz, die eine segmentierte ringförmige Anregung der Probe verursachen und die Sensitivität gegenüber Scherbewegungen erhöhen. Mithilfe einer ersten strahlentheoretischen Startwertschätzung werden eine multimodale, semianalytische Simulation der Schallausbreitung im Wellenleiter realisiert und schließlich die Materialparameter im inversen Ansatz geschätzt.
Grid-based spatially-resolved strain measurement in highly stretchable conductive elastomers
Authors: Mersch Johannes , Da Silva Marco
Published: August 2024

Diese Arbeit befasst sich mit einem gitterbasierten Ansatz zur ortsaufgelösten Dehnungsmessung mit einem Faser-Elastomer-Verbundwerkstoff. Bei der gitterbasierten Methode wird ein Netzwerk aus leitfähigen Textilelektroden verwendet, die in eine weiche Elastomermatrix eingebettet sind, um die Dehnung durch Änderungen des elektrischen Widerstands zu erfassen. Im Gegensatz zur elektrischen Impedanztomographie, deren Einsatz bei großen Verformungen und damit beweglichen Elektroden eine Herausforderung darstellt, sind gitterbasierte Verfahren resistenter gegenüber sich ändernden Randbedingungen. Allerdings ist gegenseitige Beeinflussung der Elektroden nachteilig. Daher wird ein anwendungsspezifisches elektronisches System implementiert, das auf der Zero-Potential-Circuit (ZPC)-Methode basiert. Dadurch werden diese Störeinflüsse drastisch reduziert, während gleichzeitig kurze Erfassungszeiten möglich sind. Die einfache Elektrodenkonfiguration und die direkte Widerstandsmessung des gitterbasierten Systems bieten eine unkomplizierte und dennoch effektive Möglichkeit zur Erfassung von Dehnungen oder Druck und eignen sich daher besonders für Anwendungen, die eine räumliche Auflösung und Robustheit unter verschiedenen mechanischen Bedingungen erfordern. Das umgesetzte Messsystem kann anschließend während einer Zugprüfung mit hohen Dehnungsniveaus von Faser-Elastomer-Verbundwerkstoffen mit unterschiedlichen Leitfähigkeitsgraden oder Sensorgeometrien angewandt werden.
Archaeological mineralised textiles from the Iron Age tumulus of Creney-le-Paradis support its elite status
Authors: Iacconi Clémence , Desplanques Elsa , Moulherat Christophe , L'Héronde Maëva , King Andrew , Autret Awen , Schöder Sebastian , Fayard Barbara , Leccia Émilie , Bertrand Loïc
Published: August 2024

Looting and plough damage to the eighth–fifth centuries BC tumulus of Creney-le-Paradis, France, hinders interpretation of this potentially significant site. Nevertheless, application of novel microtomographic techniques in combination with optical and scanning electron microscopy allows the first detailed examination of 99 textile fragments recovered from the central pit. The authors argue that the diversity of textiles revealed—at least 16 different items—and the quality of weaving involved confirm earlier interpretations of the high status of this burial, which is comparable, at least in terms of textiles and metal urns, with other ‘aristocratic’ tombs of the European Iron Age.
The Temporal and Directional Relationship Between Group-Level Implicit and Explicit Gender Bias
Authors: Tang Yun , Hehman Eric , Chen Jacqueline M.
Published: August 2024

Explicit and implicit gender-science and gender-career biases have shifted toward neutrality in the past decade. Researchers speculate that these changes result from women's increased visibility in the science field and job market, but little is known about how the changes in group-level explicit and implicit gender-science and gender-career bias relate to one another over time. Building on contemporary models of group-level bias, this study investigates the temporal and directional relationship between group-level implicit and explicit gender bias between 2007 to 2016 using multivariate multilevel modeling. We found that lower group-level implicit bias in a previous month predicts lower group-level explicit bias in the following month. We also found evidence that group-level explicit bias in a previous month was positively associated with group-level implicit bias in the following month. These findings have practical and theoretical implications for understanding the bidirectional relationship between group-level implicit and explicit biases over time.
Expografia Acessível: Estudo de Suporte Expográfico com Desenho Universal
Authors: Correa Celina Maria Britto
Published: August 2024

Cumprir com a missão de ser um museu inclusivo propõe desafios às instituições museais de diversas ordens, entre elas, a resolução de problemas referentes à acessibilidade de recursos expositivos. Este texto relata a aplicação dos princípios que definem o desenho universal em expositores de espaços de exibição voltados para receber todos os públicos. A partir da avaliação dos critérios de deslocamento, usabilidade, comunicação, conforto e estratégias de recepção e permanência aplicáveis a todos os públicos, buscou-se formular uma proposta que traduzisse o esforço em promover acessibilidade para pessoas com deficiência motora e sensorial em museus, consignando, dessa forma, o desejo de viabilizar o conceito basilar de um ambiente que oferece a possibilidade de receber grupos diversos.
Conflitos e Disputas pela Memória: as Ruínas de São João Marcos
Authors: Oliveira Maria Amália Silva Alves
Published: August 2024

São João Marcos (RJ) é um sítio arqueológico formado pelas ruínas da cidade de mesmo nome e cuja destruição, para dar lugar a construção de uma usina hidrelétrica promoveu processo de desocupação para posterior inundação das terras. Utilizando material recolhido em trabalho de campo para elaboração de tese de doutorado, apresento neste trabalho um relato do processo de elaboração da memória coletiva da destruição do conjunto arquitetônico da referida Cidade. Conflitos e tensões resultantes do episódio pontuam a utilização dessa memória, cuja materialização centra-se no Parque Arqueológico e Ambiental de São João Marcos, lugar de memória onde emerge novas subjetividades decorrentes da seleção de determinado conteúdo exposto durante a realização de atividades que compõem o Programa de Educação Patrimonial do lugar de memória anteriormente citado.
Museo Patrimonial de Marmato (Caldas): Reivindicación y Protección de la Memoria
Authors: Sanchez Daniel Gordillo
Published: August 2024

El presente ensayo realiza un análisis crítico-reflexivo entorno al patrimonio cultural del municipio de Marmato (Caldas – Colombia) el cual hoy está en riesgo de desaparecer debido a la presencia de proyectos de gran minería en su territorio. Marmato, con más de 470 años de antigüedad, es uno de los municipios más antiguos de Colombia y el segundo territorio de mayor producción aurífera; además, es habitado por poblaciones indígenas y afro-colombianas. Se descubrió una inmensa oportunidad de trabajo con el objetivo de rescatar, organizar y difundir este legado histórico y cultural. Así, se propone el desarrollo de un Museo Virtual que centralice y difunda la riqueza cultural y ancestral del municipio, y de sus habitantes, a través de narrativas que confluyen en un ambiente web. De igual forma, este desarrollo espera nutrir el debate en torno a la protección de estos territorios sagrados, los cuales quieren ser explotados por intereses económicos tanto nacionales como extranjeros.
Escavação Arqueológica no Cerrito Psg-02-Valverde-02, Banhado do Pontal da Barra, Pelotas - RS. Campanha de 2011
Authors: Milheira Rafael Guedes , Marin Daiane Amaral , Ortiz Simone Freitas , Coradi Sara , Motta Patrícia , VON DER MÜHLEN Cristiano
Published: August 2024

Esse trabalho é um relatório resumido da escavação arqueológica do cerrito PSG-02-Valverde-02, que inaugura as atividades intra-sítio no banhado do Pontal da Barra, Pelotas-RS. A pesquisa é realizada no âmbito do projeto Arqueologia e História Indígena do Pampa: Estudo das populações pré-coloniais na bacia hidrográfica da Laguna dos Patos e Lagoa Mirim, em desenvolvimento pelo Laboratório de Ensino e Pesquisa em Antropologia e Arqueologia da Universidade Federal de Pelotas (LEPAARQ-UFPEL).
A iluminação artificial como instrumento da expografia das cidades e dos museus
Authors: Junqueira Mariana Garcia , Yunes Gilberto Sarkis
Published: August 2024

O presente ensaio consiste em apresentar uma aproximação possível entre cidades e museus, criando uma sobreposição entre as interpretações da cidade contemporânea e as funções museológicas atuais. Tem como objetivo fazer a leitura do espaço urbano como um arquivo passível de investigações e revelações, o que o aproximaria do museu, em princípio, pela finalidade.  Além disso, são consideradas elemento fundamental desse rebatimento, as funções da iluminação artificial – urbana e de interiores – uma vez que se propõe que o modo de iluminar contemporâneo pode seguir semelhantes critérios ou diretrizes em ambos os espaços considerados nesta proposição: o espaço urbano e o espaço museológico interno, uma vez que eles contêm informações que devem ser evidenciadas e informadas através de uma expografia proposta.
Effects of Context Changes on Memory Reactivation
Authors: Özdemir Şahcan , Şentürk Yağmur Damla , Ünver Nursima , Demircan Can , Olivers Christian N. L. , Egner Tobias , Günseli Eren
Published: August 2024

While the influence of context on long-term memory (LTM) is well documented, its effects on the interaction between working memory (WM) and LTM remain less understood. In this study, we explored these interactions using a delayed match-to-sample task, where participants (6 males, 16 females) encountered the same target object across six consecutive trials, facilitating the transition from WM to LTM. During half of these target repetitions, the background color changed. We measured the WM storage of the target using the contralateral delay activity in electroencephalography. Our results reveal that task-irrelevant context changes trigger the reactivation of long-term memories in WM. This reactivation may be attributed to content–context binding in WM and hippocampal pattern separation.
Attention-Deficit/Hyperactivity Disorder Symptoms as a Function of Arousal and Executive Vigilance: Testing Halperin and Schulz’s Neurodevelopmental Model in a Sample of Community Adults
Authors: Coll-Martín Tao , Carretero-Dios Hugo , Lupiáñez Juan
Published: August 2024

Halperin and Schulz’s neurodevelopmental model postulates that the onset of attention-deficit/hyperactivity disorder (ADHD) in childhood is due to subcortical alterations, whereas the disorder’s trajectory into adulthood depends on the development of executive functions. Based on a dimensional framework of ADHD, Coll-Martín et al. (2021) found support for the model in an adult community sample assessed on arousal and executive vigilance. The present study is a preregistered (https://osf.io/tkdq7) close replication of Coll-Martín et al. expressly aimed to test the two predictions of the model. A sample of college students (N = 292 valid; 49% women; 18–30 years, M = 21.7) from a Spanish university completed self-reports of ADHD symptoms in childhood (retrospectively) and adulthood and performed the online version of an attentional task (the ANTI-Vea). Our preregistered hypotheses achieved an acceptable statistical power for the effects of interest, even after accounting for random measurement error. Despite this, none of them replicated the findings of the original study: Only the unexpected negative correlation between executive vigilance and symptoms in childhood was significant, thereby not supporting the theoretical predictions. The lack of support for the dissociation pattern hypothesized by the neurodevelopmental model was robust to multiverse and exploratory analyses. At least in terms of vigilance, ADHD symptoms seem to share altered neurocognitive pathways across the lifespan, regardless of their time of onset. This challenges the notion of late-onset ADHD as a condition neuropsychologically distinct from child-onset ADHD. Future studies need to include complementary assessment methods and clinical groups.
Immersion and Distancing
Authors: du Boulay Sofya
Published: August 2024

The departure of a charismatic leader in an authoritarian system poses substantial risks for regime durability. Designated succession guarantees a smooth transfer of power and reduces the danger to regime longevity. The manner in which political successors leverage and institutionalize charismatic attachments to regime founders is crucial in determining their own and the regime’s political survival. This article presents a new theoretical framework for examining the process of post-charismatic legitimation in two personalistic autocracies: Azerbaijan and Kazakhstan. Authoritarian power justification can be understood through two modes of post-charismatic succession: immersion and distancing. If successfully performed, charismatic attachments and public loyalties to regime founders transfer to their appointees, reviving existing power narratives: an immersion strategy. However, if the charismatic leader loses popular support, the distancing strategy allows an anointed heir to reject patronal legacies. The comparison between post-charismatic successions in Baku and Astana demonstrates the practical implications of the immersion and distancing approaches to legitimation. This analysis is based on expert interviews, fieldwork notes, and archival data.
Ultrasonic spray synthesis, photoelectric properties and photovoltaic performances of chalcogenide CaSnS3
Authors:   Department of Automotive Engineering, Hebei Vocational University of Technology and Engineering, Xingtai 054000, China, Jia J. T. , Yang X. H. ,   Department of Automotive Engineering, Hebei Vocational University of Technology and Engineering, Xingtai 054000, China, Wang L. W. ,   Department of Automotive Engineering, Hebei Vocational University of Technology and Engineering, Xingtai 054000, China
Published: August 2024

Chalcogenide perovskites are promising lead-free, stable absorber materials for solar cells. This work reports the synthesis of orthorhombic phase pure CaSnS3 thin films by facile low temperature sulfurization of solution-processed CaSnO3 oxide precursors. Structural characterization confirms complete anion exchange to produce crystalline CaSnS3 films with vertically aligned rod-like grains. Optical studies show strong visible light absorption with direct bandgap of 1.72 eV, ideal for photovoltaics. Electrical measurements indicate p-type conductivity with hole concentration of 1.2×1017 cm-3 and mobility around 8 cm2V-1s-1 at room temperature. First-principles DFT calculations corroborate the p-type electronic structure. Prototype CaSnS3 solar cells are fabricated with TiO2 electrode, demonstrating power conversion efficiency of 2.5% under AM1.5G, open-circuit voltage of 0.55 V, short circuit current density of 11.5 mA/cm2 and fill factor of 0.62. The cells also exhibit remarkable ambient shelf stability over 6 months. The comprehensive results validate the photovoltaic potential of these earth abundant, sustainable chalcogenide perovskites synthesized via scalable low-cost solution methods. Further interface engineering can enable enhanced efficiencies.
Comparative studies on pinhole free CBD-CdZnS thin films on ITO and FTO substrate
Authors:   Department of Physics, Chaibasa Engineering College, Kelende, Jhinkpani, Jharkhand- 833215, India, Kumar S. , Alam A. ,   Department of Engineering Physics, Al-kabir Polytechnic, Jamshedpur, Jharkhand-831012, India, Tiwary K. P. ,   Department of Physics, Birla Institute of Technology, Mesra, Patna Campus, Bihar-800014, India
Published: August 2024

The development of CdZnS thin films using the chemical bath deposition process in nonaqueous media is a technological challenge. In this work, 75 millilitres of ethylene glycol and ethanol (1:2 ratios) were used to develop a CdZnS thin film on ITO and FTO glass substrates using cadmium acetate, zinc sulphate, and thiourea. The ideal bath temperature was kept at 1300C and the anneal temperature of the film that had been deposited in the air was maintained at 3500C. The films have been examined using FTIR, WCA, FESEM, and XRD. XRD studies reveal that CdZnS films have a hexagonal crystal structure with a preference for orientation (002) during the deposition and annealing processes and the assessment of the various attributes have been done, such as dislocation density, micro strain, and grain size. FESEM study indicates that as deposited film on ITO glass have smooth surface and grains appear in the form of small needle shape of equal sizes where as FTO substrate reveals the grains of equal size throughout the entire surface in cluster form. It is also confirmed that both the CdZnS films formed on ITO and FTO substrates have hydrophilic quality. The presence of chemical bonds and functional groups was confirmed by FTIR analysis.
Icariside II protects from marrow adipose tissue (MAT) expansion in estrogen-deficient mice by targeting S100A16
Authors: Li Dong , Cao Chenhao , Li Zhuofan , Chang Zhiyong , Cai Ping , Zhou Chenxi , Liu Jun , Li Kaihua , Du Bin
Published: August 2024

Icariside II, a flavonoid glycoside, is the main component found invivo after the administration of Herba epimedii and has shown some pharmacological effects, such as prevention of osteoporosis and enhancement of immunity. Increased levels of marrow adipose tissue are associated with osteoporosis. S100 calcium-binding protein A16 (S100A16) promotes the differentiation of bone marrow mesenchymal stem cells (BMSCs) into adipocytes. This study aimed to confirm the anti-lipidogenesis effect of Icariside II in the bone marrow by inhibiting S100A16 expression. We used ovariectomy (OVX) and BMSC models. The results showed that Icariside II reduced bone marrow fat content and inhibited BMSCs adipogenic differentiation and S100A16 expression, which correlated with lipogenesis. Overexpression of S100A16 eliminated the inhibitory effect of Icariside II on lipid formation. β-catenin participated in the regulation adipogenesis mediated by Icariside II/S100A16 in the bone. In conclusion, Icariside II protects against OVX-induced bone marrow adipogenesis by downregulating S100A16, in which β-catenin might also be involved.
Depression-related testosterone deficiency is linked to reduced cholesterol levels in Leydig cells of CUMS mice
Authors: Huang Jiaojiao , Li Xinyu , Zhang Dongyu , Wang Luzhen , Li Zhao , Song Zhenhua
Published: August 2024

In brief

Male reproductive problems under psychological stress were widely studied. Using chronically unpredictable mild stress-treated mice, we found that reduced serum testosterone levels were related to the low level of cholesterol in the Leydig cells.

Testosterone deficiency in humans can be caused by depressive symptoms; however, the causes of this deficiency are incompletely understood. This study demonstrates that male mice with depression-like symptoms due to chronic unpredictable mild stress (CUMS) show reduced serum testosterone levels and disrupted sexual behaviors. However, the observed testosterone reductions were not caused by apoptosis of Leydig cells. Oil red O staining revealed that lipid droplets were dramatically decreased in Leydig cells, suggesting that defects in cholesterol uptake might be related to testosterone deficiency in depression-like mice. To investigate the potential mechanism, lipid homeostasis was examined by liquid chromatography-tandem mass spectrometry. The results revealed that higher levels of sphingomyelins (SM 8:0;2O/28:1, 18:0;2O/22:2, 33:0;3O, 33:1;2O) were linked to decreased cholesterol levels. Further investigation indicated that testosterone biosynthesis from cholesterol in Leydig cells was impaired by the downregulation of Ldlr, Srb1, Lhr, and P450scc. Elevated levels of interferon signaling-associated pathways in depression-like mice testes may also contribute to decreased testosterone levels. Taken together, these findings provide a novel understanding of male reproductive problems under psychological stress and suggest that cholesterol uptake might be a causal factor in reduced testosterone production in depression-like mice.
Os coadjuvantes na cena politica da Paraíba na Primeira Republica: o papel das oposições (1892-1930)
Authors: Cittadino Monique
Published: August 2024

Duas grandes oligarquias controlaram a política paraibana ao longo da Primeira República. Inicialmente, substituindo a breve gestão do juiz de direito Venâncio Neiva (dez./1889-nov./1891) à frente do governo estadual, instalou-se a oligarquia comandada pelo major Álvaro Machado, nomeado pelo então presidente Floriano Peixoto (1891-1894) para o governo da Paraíba, que se manteve no comando dos destinos do estado até 1912, ano da morte de seu chefe.1 Após um intervalo de três anos de disputas pelo espólio alvarista, em 1915, Epitácio Pessoa, secretário-geral do governo Venâncio Neiva, ex-ministro da Justiça no governo Campos Salles (1989-1902) e ministro recém-aposentado do Supremo Tribunal Federal, consagrou-se líder inconteste do grupo, estabelecendo um novo domínio oligárquico que se estendeu até 1930.
Partidos de oposição no estado do Paraná: ação eleitoral e composição do quadro de dirigentes (1890-1930)
Authors: Aramis Richter Gomes Sandro
Published: August 2024

Durante a Primeira República, o Partido Republicano Paranaense foi a agremiação dominante na vida política estadual. Os candidatos filiados a tal agremiação nunca foram derrotados. Esse partido não encontrou dificuldades para vencer, por quatro décadas consecutivas, todas as disputas para os cargos dos poderes Executivo e Legislativo. O surgimento de dissidências no grupo governista não impediu a agremiação de se manter hegemônica no jogo eleitoral do Paraná.
As disputas partidárias nos jornais mato-grossenses durante a Primeira Republica
Authors: R. V. de Arruda Larissa
Published: August 2024

Com a descentralização da Primeira República, as oligarquias predominaram nos contextos regionais. Os grupos locais apoiaram-se no coronelismo1 e no mandonismo, que podia envolver violência ou barganha, confrontos armados ou acordos. Por todo o país, tais recursos foram utilizados em diferentes combinações, e a recorrência à violência não foi exclusividade de nenhuma região.10.15448/1734.9
La etnofagia capitalista en el Conde Drácula: una lectura crítica y anticolonial
Authors: Brito Alvarado Xavier , Rodríguez Caguana Adriana , Castro León Felipe
Published: August 2024

Los vampiros son monstruos que deambulan entre la vida y la muerte, habitan la noche, son misteriosos, peligrosos y seductores; una combinación que aterra y fascina, convertidos en figuras que pueden acoplarse a diversos contextos sociohistóricos como el declive del imperio británico, el auge de la modernidad capitalista, entre otros. Este trabajo como eje central para el debate pretende asumir a Drácula desde su dimensión histórica, política y simbólica que lo aproxima al capitalismo etnofágico que, a través de la seducción y el engaño, atrapa a sus víctimas. Para ello, este ensayo parte del análisis histórico de Drácula como metáfora del capitalismo y explora sus diversas dimensiones sociales que han trazado el devenir de las sociedades occidentales. Metodológicamente, la elección de la literatura teórica partió de diversas miradas donde se conjugan la literatura, la historia, la economía, la política y la fantasía, que proporcionan una mirada amplia, compleja y tensionante de Drácula.
El modelo de evaluación “Valoración del Progreso Matemático basado en la Examinación e Interpretación Cuantitativo-Cualitativo” (VPM-EICC) en la educación superior
Authors: Pérez Omar Mejía
Published: August 2024

El objetivo de este estudio es valorar el modelo de evaluación VPM-EICC en la educación superior para considerarlo o descartarlo como una alternativa evaluativa a partir de las impresiones de las personas evaluadas y los resultados de desempeño. Este modelo de evaluación toma, como su eje vertebral, la confección y aplicación del instrumento examinador apoyado de la rúbrica de verificación, intentando cualificar los criterios para blindar de mayor objetividad los juicios cuantitativos y, de este modo, sistematizar el proceso evaluativo. El modelo de evaluación, que nace como una necesidad en el bachillerato o educación secundaria, se implementa ahora en la educación superior para valorar su pertinencia y así tener mayores oportunidades de aplicabilidad en distintos niveles educativos, sectores y contextos, y, con ello, hacerlo evolucionar hacia horizontes más productivos. A través de un enfoque mixto, se recopilan datos mediante una encuesta y tres pruebas, propias de la evaluación del desempeño. Se encontraron resultados satisfactorios de pertinencia que bien podrían promover el modelo como una alternativa viable y confiable.
Sobre la crítica cultural en la República literaria de Saavedra Fajardo
Authors: González de Requena Farré Juan Antonio
Published: August 2024

En República literaria (1670), de Diego Saavedra Fajardo, es posible encontrar una modalidad de crítica barroca que resultó sumamente influyente en cierta tradición crítica hispana. Este estudio se propone interpretar la duplicidad y las aporías de la crítica cultural barroca mediante un análisis de la sátira filológica del escritor murciano. A través de esa obra, se encuentra un juicio crítico doble y ambivalente en sus propias dicotomías críticas, un modo de representación alegórico tan alusivo como indeterminado y, finalmente, una contención del cuestionamiento crítico bajo las máximas de cierta razón de Estado literaria. Cabe concluir que República literaria dista de la República de las letras ilustrada y exhibe, más bien, las dobleces y contradicciones de una conciencia cultural escindida.
Hacia una educación omnicanal: caso de estudio en alumnado de la licenciatura en Mercadotecnia del centro de México
Authors: Gutierrez Leefmans Catalina , Nava Rogel Rosa María
Published: August 2024

Desde el inicio de la pandemia por COVID-19, los canales de comunicación con mediación tecnológica han evolucionado con mayor intensidad, sobre todo en la educación. Considerando la gran cantidad de canales que utiliza el alumnado universitario en el proceso enseñanza aprendizaje, y aceptando que éste tiene diversos canales cognitivos, se requiere ser eficientes. Este trabajo tuvo el objetivo de evaluar la omnicanalidad como recurso para lograr un aprendizaje efectivo en el estudiantado de nivel superior. Se partió de una serie de actividades que utilizan diversos canales de comunicación de manera integral, como parte de una investigación exploratoria-descriptiva realizada con 56 estudiantes universitarios de la licenciatura en Mercadotecnia. Durante un semestre escolar se desarrollaron actividades con un formato omnicanal y al final del curso se realizó una encuesta para evaluar la metodología aplicada. Se propone el uso de la omnicanalidad en el aula como una estrategia innovadora y efectiva para la educación. Integrando las actividades de aprendizaje, considerando medios digitales y presenciales a través de un caso de estudio que permite identificar y aprovechar las ventajas que ofrece cada canal. Entre los hallazgos más importantes, se corrobora que el uso de la omnicanalidad educativa se percibe con resultados positivos para el aprendizaje y es aceptado favorablemente por el estudiantado.
Egzakt, véges mintás, sztochasztikus garanciák gépi tanulási módszerekhez
Authors: Tamás Ambrus
Published: August 2024

Összefoglalás.

A gépi tanulás a mesterségesintelligencia-kutatások egyik fő pillére, melynek
matematikai hátterét a statisztikus tanuláselmélet biztosítja. A gépi tanulási
módszerek bizonytalanságának meghatározása esszenciálissá vált számos alkalmazás
esetében, többek között a biztonság, a stabilitás és a minőség garantálása
érdekében. Ebben a tanulmányban újra-mintavételező eljáráson alapuló
konfidenciahalmaz-becsléseket mutatunk be, amelyek eloszlásfüggetlen és véges
mintás korlátokat biztosítanak a becslések bizonytalanságára. A
konfidenciahalmazokat egzakt és konzisztens rangtesztek segítségével
konstruáljuk meg, és számos példán szemléltetjük. A várható értékre és a
feltételes várhatóérték-függvényre adunk halmazbecslést felügyelt tanulási
feladatok (regresszió és osztályozás) esetében.

Summary.

Machine learning (ML) is one of the fundamental methodologies within artificial
intelligence (AI), which is widely used in several fields, such as finance,
health care, manufacturing and control. A classical problem in ML is to estimate
the unknown parameters of an environment based on noisy observations. In many
real-world applications involving safety and stability criterions, it is
essential to quantify the uncertainty of these estimates.

Confidence regions are classical tools in uncertainty quantification, often used
to assess the quality of an estimate. In this paper we investigate a resampling
framework to construct confidence regions and hypothesis tests for several
supervised learning problems. First, we present a resampling scheme to build
confidence intervals for the expected value of an unknown symmetric
distribution. We generate alternative observations based on a candidate
parameter, then compare the original sample to the alternative dataset. If the
candidate parameter is equal to the true expected value, then the alternative
samples have the same distribution as the original sample, otherwise the
alternative samples follow a different distribution. This distributional
difference can be detected with a rank test. The main ideas of this procedure
can be generalized to regression and binary classification problems, in which
cases we build confidence regions for the true regression function.

The presented methods are endowed with strong theoretical guarantees. The
user-chosen confidence levels of the confidence regions are non-asymptotically
exact. The confidence sets are defined via flexible rank tests, while our
distributional assumptions are very mild. We usually assume symmetry or
exchangeability and therefore the presented algorithms are distribution-free,
thus superior to many other methods in practice. We also investigate the
asymptotic behaviors of the presented methods and establish several theoretical
results regarding the consistency of the confidence regions.