bluuebunny/crossref_metadata_2025 huggingface dataset:
Accessing the emotional and intangible: combining family history, collaboration and subjectivity as a methodology
Authors: King Laura
Published: September 2024

How can we get at the intimate worlds of families in the past? This article reflects on a methodology of collaborative critical family history as a way to better understand both what families did in the past and how those histories have been constructed and passed on. Through a collaborative project with family historians and research into my own family, this research project involved a different kind of researcher subjectivity. This article considers how we might use concepts of feeling like, feeling with, and feeling for research participants, both living and dead, to write more ethical histories, and to write histories that are inaccessible through conventional archival methodologies.
Dynamics analysis of a diffusive prey-taxis system with memory and maturation delays
Authors: Sun Hongyan , Hao Pengmiao , Cao Jianzhi
Published: September 2024

In this paper, a diffusive predator-prey system considering prey-taxis term with memory and maturation delays under Neumann boundary conditions is investigated. Firstly, the existence and stability of equilibria, especially the existence, uniqueness and stability of the positive equilibrium, are studied. Secondly, we prove that:
(
i
)
there is no spatially homogeneous steady state bifurcation as the eigenvalue of the negative Laplace operator is zero;
(
i
i
)
as this system is only with memory delay

τ

1

, the the spatially nonhomogeneous Hopf bifurcation appears;
(
i
i
i
)
when the model is only with maturation delay

τ

2

, the system has spatially homogeneous and nonhomogeneous periodic solutions;
(
i
v
)
for the case of two delays, the system has rich dynamics, for example, stability switches, whose curves have four forms. Finally, some numerical simulations are produced to verify and support the theoretical results.
Ground state sign-changing solution for a logarithmic Kirchhoff-type equation in

R

3
Authors: Yang Wei-Long , Liao Jia-Feng
Published: September 2024

We investigate the following logarithmic Kirchhoff-type equation:

(

a
+
b

∫

R

3

|

∇
u

|

2

+
V
(
x
)

u

2

d
x

)

[
−
Δ
u
+
V
(
x
)
u
]
=

|

u

|

p
−
2

u
ln
⁡

|

u

|

,

x
∈

R

3

,

where
a
,
b
>
0
are constants,
4
<
p
<

2

∗

=
6
. Under some appropriate hypotheses on the potential function
V
, we prove the existence of a positive ground state solution, a ground state sign-changing solution and a sequence of solutions by using the constraint variational methods, topological degree theory, quantitative deformation lemma and symmetric mountain pass theorem. Our results complete those of Gao et al. [Appl. Math. Lett. 139(2023), 108539] with the case of
4
<
p
<
6
.
Hypercalcemia in Hodgkin’s Lymphoma – A Case Report
Authors: Nikitha Kunnath  , Vinod Vallomparbath Sathiaseelan  , Amrutha Prabhakaran  , Anjana Attupurath Mana
Published: September 2024

Hypercalcemia, though rare is an important cause of diffuse aches and pains. More relevant is the cause, which can sometimes be treatable and at other times not. Here, we present a case of 48-year-old man with lymphadenopathy, hypercalcemia and acute kidney injury who was diagnosed with Hodgkin’s lymphoma.
This case is about a 48-year-old man who presented with symptoms of hypercalcemia and generalised lymphadenopathy. With a predisposition of EBV infection, Hodgkin’s lymphoma was identified to be the source of hypercalcemia, leading on to the hypercalcemic nephropathy. Hypercalcemia is usually seen with non-hodgkins lymphoma and only a few reports of hypercalcemia associated with Hodgkins lymphoma had been published. The usual mechanism is Vit D dependent, however, in our patient hypercalcemia was probably mediated by PTHrP; since both the vit D and activated vit D levels were normal. The presence of PTHrP mediated hypercalcemia Hodgkin’s lymphoma makes our case rare, as an uncommon presentation of a disease with yet another uncommon mechanism underlying.
ALÉM DOS RÓTULOS
Authors: De Liz Cinthia , Bertoncini Vicenzi Vinicius
Published: September 2024

Este relato de experiência retrata a introdução de um adolescente de pseudônimo Ângelo como auxiliar pedagógico em uma turma de Educação Infantil em um contexto cuja maioria das auxiliares são do gênero feminino. Em uma perspectiva foucaultiana, o texto busca refletir sobre o discurso de uma diretora escolar sobre a presença de Ângelo em uma instituição de educação para crianças pequenas. Busca-se fazer uma análise reflexiva sobre a prevalência de normas e estereótipos de gênero que marginalizam, restringem a diversidade e perpetuam desigualdades, bem como refletir sobre como o poder e as normas sociais influenciam ações e pensamentos, reconhecendo no texto as relações de poder e os discursos normalizantes tidos como “verdades” que circulam pela sociedade, especialmente na área de gênero e sexualidade. Este relato, além de proporcionar uma reflexão, ressalta a importância de questionar as relações de poder que sustentam práticas excludentes, buscando por resistência às normas estabelecidas.
EDUCAÇÃO TRANSDEFIÇA
Authors: Antoniassi Sassine Leila , Soares Barcelo de Miranda Suelen , Maio Eliane Rose
Published: September 2024

O presente artigo é resultado parcial da pesquisa realizada durante o Mestrado em Educação de uma das pessoas autoras, que é trans e possui deficiência visual. O tema contempla a educação de transdefiças, e aqui, nosso objetivo geral é discutir como pessoas trans com deficiência, mais especificamente com Transtorno do Espectro Autista (TEA), vivenciaram o ensino formal. O objetivo específico é entender como a corponormatividade implica na exclusão e silenciamento de corpos dissidentes no espaço escolar. Questionamos: como foi para pessoas trans com TEA frequentar espaços de educação formal? Apontamos como referenciais teóricos a Teoria Crip e transfeminismos, em uma metodologia qualitativa na modalidade pesquisa de campo, contribuindo com um trabalho autoetnográfico, com escrita autobiográfica em primeira pessoa. Entre os resultados compreendemos que existe uma norma social heterocisgênera corponormativa e compulsória, atuando historicamente como mecanismo violento de apagamento e exclusão de corpos transdefiças. Nossas considerações revelam que as pessoas trans com deficiência enfrentaram inúmeras violências nos espaços formais de educação, como violências sistêmicas, transfobia, lgbfobia, gordofobia etc.
PIERRE BOURDIEU E A QUESTÃO DE GÊNERO A PARTIR DA OBRA A DOMINAÇÃO MASCULINA
Authors: Soares de Lima Valeria , Peres Gonçalves Josiane , Ferreira de Oliveira Elaine , Lisboa de Oliveira Gislene
Published: September 2024

O presente artigo tem por objetivo apresentar uma breve discussão acerca dos aspectos conceituais e históricos, relacionados aos estudos de gênero, entre eles, a concepção feminista reforçada pela percepção de Pierre Bourdieu em “A Dominação Masculina” sobre como a estrutura social estabelecida influencia nos discursos consensuados de dominação por meio da violência simbólica e do habitus sexuado. Uma pesquisa científica de revisão bibliográfica, que discute na concepção de Bourdieu, como o “sistema simbólico”, por intermédio da comunicação, pode reforçar a reprodução das diferenças sexuais, baseada nas distinções biológicas e anatômicas femininas e masculinas em uma cultura androcêntrica, e como as ações políticas entre os entes sociais (escola, família e igreja) podem reduzir o processo de dominação e distinção sexual estabelecendo um novo parâmetro para os estudos sobre gênero na contemporaneidade.
(R)EXISTÊNCIA DE PESSOAS TRANSEXUAIS E TRAVESTIS NA DISPUTA PELO PODER LOCAL
Authors: Almeida Silva Bruno , Ketzer Patricia
Published: September 2024

O presente trabalho pretende mapear as candidaturas transexuais e travestis nos pleitos de 2020 e 2022. Serão utilizados levantamentos realizados em portais de notícias, dados do INESC, IBGE, ANTRA e Aliança Nacional LGBTI.  Na revisão bibliográfica, Carlos (2021) servirá de base para analisar o direito à cidade, Fischer (1992) para compreender a disputa pelo poder local na política institucionalizada. Connel (2014), Santos (2016), Butler (2014) e Adelman (2003) auxiliarão na reconstrução da trajetória pela qual pessoas com identidades de gênero e sexualidades dissidentes são jogadas à margem da sociedade. Assis (2019), Collins; Bilge (2021) e Crenshaw (2002) contribuem para uma análise interseccional, pois corpos trans e travestis são atravessados por outras opressões. Ao final, concluímos que, ainda que o avanço da disputa pelo poder local tenha colocado em evidência a necessidade de pessoas travestis e transexuais, existe um longo caminho para garantir que essas pessoas obtenham o reconhecimento merecido.
A SEXUALIDADE NA ESCOLA
Authors: Orende da Silva Rosiane , Hees Garré Bárbara , Da Silva Vieira Ana Gabriela
Published: September 2024

A escola é instituição na qual funcionam variados mecanismos de poder – disciplinares e, também, biopolíticos. Partindo da problematização foucaultiana acerca da sexualidade e, portanto, entendendo que a sociedade em que vivemos faz circular continuamente discursos sobre o sexo, nos afastamos dos discursos políticos neoconservadores que argumentam que a escola não é um lugar onde se fala de sexualidade. A escola profere discursos sobre o sexo e a sexualidade cotidianamente, ao propor práticas curriculares pautadas no gênero e ao disciplinar os corpos dos sujeitos a comportamentos considerados úteis ou aceitáveis. Para além disso, os discursos que circulam na escola se estendem a sociabilização entre os(as) estudantes, que trocam aprendizados e experiências. A partir de metodologia de análise discursiva de inspiração foucautliana, nas séries da Netflix analisadas – Sex Education e Big Mouth – vê-se a circulação de discursividades sobre a sexualidade na escola, que aparece enquanto espaço no qual os(as) jovens são subjetivados e aprendem uns com os outros a respeito do sexo.
CRIANÇA VIADA E HETEROTERRORISMO
Authors: Ziderich do Amaral Fernando
Published: September 2024

Pretendemos com este artigo, em um primeiro momento, apresentar dois conceitos: (1) a Criança Viada como potência subversiva a partir da experiência de vida do autor ao discorrer sobre o atropelamento da subjetividade das crianças não normativas; e (2) o Heteroterrorismo, explicitando seu caráter colonial. Abordamos os efeitos do terrorismo de gênero e suas consequências, a exemplo do auto-ódio e negação de si próprio. Apresentamos uma minusciosa análise bibliográfica com objetivo de compreender como a binariedade de gênero articula o extermínio de corpes que fogem àquilo que desenhamos como a Masculinidade Colonial. Apresentamos a criança, portanto, como território em disputa, bem como a constante vigilância exercida pela heteronorma sobre sua subjetividade, criando meninos para serem “homens de verdade” na construção de um estereótipo de virilidade desde a infância. Concluímos, pois, que o Heteroterrorismo infantil garante a normatização cisheterossexual do adulto, através das políticas da Masculinidade Colonial. Bem como sugerimos formas de alianças contra-hegemônicas, por novos mundos possíveis.
A ATUAÇÃO DAS JUVENTUDES FEMINISTAS E ANTIFEMINISTAS NA CÂMARA DOS DEPUTADOS
Authors: Carvalho de Sousa Brito Kellen , Perez Olívia Cristina
Published: September 2024

O artigo mostra como os feminismos e antifeminismos se apresentam na Câmara dos Deputados por meio das juventudes parlamentares, entre os anos de 2019 e 2022, última legislatura completa da casa. Foi realizada uma pesquisa qualitativa e documental dos 32 Projetos de Lei (PLs) protocolados por deputados federais de 21 a 29 anos de idade que versassem sobre direitos das mulheres e grupos LGBTQIAPN+. Verificou-se que, apesar de as juventudes parlamentares se apresentarem mais feministas do que antifeministas, este feminismo se mostrou de aspecto mais binário e cisgênero, com reduzida defesa dos direitos LGBTQIAPN+. Já nos PLs antifeministas, as questões de gênero e diversidade são claramente rejeitadas. Assim, os direitos dos grupos LGBTQIAPN+ não são defendidos pelas juventudes feministas ao mesmo tempo que são fortemente combatidos pelas juventudes antifeministas.
JUVENTUDES PERIFÉRICAS E O HIP HOP ALAGOANO
Authors: Silva Pâmela Tamires Bezerra Ferreira da , Da Silva Rosemeire Reis
Published: September 2024

O presente estudo é oriundo de uma dissertação de mestrado vinculada ao grupo de pesquisa Juventudes, Culturas e Formação da Universidade Federal de Alagoas. Partimos da problematização em torno das relações de gênero,  políticas e socioculturais existentes entre  as juventudes e suas culturas periféricas urbanas, mas especificamente no movimento hip hop. Desse modo, nesse texto, pretendemos dialogar analiticamente com os Estudos culturais, a tendência pós-estruturalista e a perspectiva sócio-histórica para além das discussões  advindas da teoria da Reprodução Social. Como abordagem metodológica foi realizada uma etnografia urbana (2015-2016) com jovens entre 18 e 27 anos de idade em um bairro periférico de Maceió. Os resultados apontam que  ainda tem sido limitada as discussões em prol do reconhecimento e empoderamento de gênero, identitário, cultural e político entre os/as jovens e suas culturas periféricas, seja do âmbito social ao acadêmico.
TEMOS NOSSAS CORES, NOSSAS FORÇAS E NOSSA ARTE
Authors: Nazarete Lopes Mauricio , Costa Ribeiro Paula Regina , Ribeiro de Vargas Juliana
Published: September 2024

No artigo, buscamos investigar as representações de masculinidades juvenis visibilizadas em seis videoclipes de grupos de rock e rap, formados por jovens de uma cidade ao sul do Rio Grande do Sul. Os videoclipes foram selecionados levando em conta ordem cronológica de publicação e que apresentassem elementos para a discussão a respeito das masculinidades. A análise cultural foi a metodologia empregada para analisar as representações presentes nesses artefatos. Relacionado ao rock, encontramos representações de masculinidades que buscam contestar representações de masculinidades hegemônicas que proporcionam violências contra jovens e moradores de periferias urbanas. Em relação ao rap, encontramos representações de masculinidades juvenis negras e marginalizadas, que buscam denunciar violências presentes em suas quebradas e de quando esses jovens saem de suas quebradas e sofrem preconceitos. Como considerações finais vimos que os seis artefatos culturais investigados buscam por denunciar as realidades sociais presentes nos cotidianos dos jovens pertencentes aos grupos musicais.
PEDAGOGIAS DOS ARTEFATOS CULTURAIS NA CONSTITUIÇÃO DE JUVENTUDES, GÊNERO E SEXUALIDADE
Authors: Guimarães Lins Raquel , De Castro Roney Polato
Published: September 2024

O artigo apresenta algumas das problematizações construídas em uma pesquisa de doutorado em educação, cujo foco esteve nos processos de constituição de juventudes, relações de gênero e sexualidades, entendidos enquanto processos educativos. As inquietações que conduziram à investigação se produziram com processos experienciados por meio da escola e dos artefatos culturais. As/os participantes foram estudantes de turmas de Ensino Médio integrado em uma escola de educação profissional e tecnológica, situada na Zona da Mata mineira. Neste artigo, apresentamos uma discussão voltada para a realização do projeto de extensão Juventudes e Diversidade em Foco, uma das estratégias de pesquisa, com especial atenção aos processos de constituição de juventudes instaurados na relação com filmes e séries indicados pelas/os participantes do projeto. Selecionamos um dos tópicos de discussão gerados com a realização do projeto: as questões envolvendo amor e paixão, a partir do filme ‘Para todos os garotos que já amei’.
SAÚDE MENTAL E VIVÊNCIAS FORA DOS BINARISMOS DE GÊNERO ENTRE JOVENS ESTUDANTES DE GRADUAÇÃO
Authors: Pereira de Souza Victor , Bleicher Taís , De Castro Diniz Breno
Published: September 2024

O estudo explora vivências fora dos binarismos entre graduandos dentro e fora do ambiente universitário, junto a dimensões subjetivas acerca de suas construções identitárias, como determinantes de saúde mental. Partindo de perspectivas queer-psicanalíticas, fez-se uso de entrevistas informadas pelo método FANI, analisadas com base em teorias objeto-relacionais. Justificou-se o recorte populacional pela vulnerabilidade psicossocial de jovens estudantes minoritários e da população não-binária em geral. Obteve-se que, em geral, as universidades são ambientes seguros para a exploração dessas identidades, face aos demais. O encontro de uma comunidade aceitadora promoveu melhoras na relação com a própria identidade, reduzindo ansiedades internalizadas. Foram relatados episódios positivos e negativos com as políticas inclusivas, mas em geral se sentiram contemplados pelas existentes. O estudo contribui para a formulação de novas políticas inclusivas e amplia a literatura nas áreas da saúde mental, educação, diversidade e psicanálise.
ANÁLISE DA PRODUÇÃO ACADÊMICA SOBRE SEXUALIDADE E GÊNERO NAS PRÁTICAS EDUCATIVAS DE DOCENTES DO ENSINO MÉDIO
Authors: Paiva Raynna , De Rezende Cardoso Lívia
Published: September 2024

Este artigo corresponde a uma seção específica da pesquisa de dissertação em desenvolvimento no Programa de Pós-Graduação em Educação da Universidade Federal de Sergipe, centrada na análise da produção de contracondutas em relação à diversidade sexual e de gênero nos Centros de Excelência de Aracaju. Realizou-se uma revisão de literatura com o propósito de analisar a produção acadêmica sobre sexualidade e gênero nas práticas educativas de docentes do ensino médio. A busca ocorreu na BDTD e no Catálogo de Teses e Dissertações da CAPES, resultando na seleção de 14 pesquisas científicas. A revisão evidenciou que muitos/as docentes enfrentam obstáculos para incluir as temáticas em suas aulas, como falta de conhecimento, resistências e inseguranças, destacando a necessidade de capacitação. Contudo, também aponta uma conscientização crescente sobre a importância de abordar questões de sexualidade e gênero de maneira inclusiva e respeitosa na sala de aula.
ST. VITUS CATHEDRAL AT PRAGUE CASTLE DURING THE PERIOD OF NORMALIZATION
Authors: Šnorbert Martin
Published: September 2024

This paper deals with the building modifications in the building of the Cathedral of St. Vitus, St. Wenceslas, St. Adalbert and St. Mary during the period of normalization - the 1970s and 1980s. This period has so far been neglected by researchers, although many articles and publications have been written about the history, development and artistic decoration of the cathedral. Normalization, like the entire period of communist rule in Czechoslovakia, meant the oppression of church leaders, the suppression of sacred themes in religious buildings and in everyday life. Nevertheless, the cathedral was the scene of necessary reconstruction works, as well as modifications aimed at improving the use of space and interventions based on the change of the Roman Catholic liturgy.
St. Vitus Cathedral is the most important Catholic church in the Czech Republic, formerly in Czechoslovakia, and even earlier in the Czech Kingdom. Its construction, spanning almost 700 years, demonstrates the development in culture, technical possibilities, architectural and building art. The cathedral is an essential part of the Prague Castle complex and the Hradčany panorama. Prague Castle was and still is the center of secular and ecclesiastical power. This connection was symbolically fulfilled by the most important ruler ceremonies (coronations, funerals, marriages, christenings), which took place in the cathedral.
One of the most beautiful and most photographed views of Hradčany is dominated by the silhouette of Prague Castle and especially the cathedral. The St. Vitus Cathedral rises from the base formed by the uniform design of the facades of Prague Castle, which was created during the reign of Empress Maria Theresa. For a long time the cathedral itself looked like a torso, as only the bell tower with a Renaissance and later Baroque helmet was built. The transept and the towers in the facade were not completed until the late 19th and early 20th centuries.
On the basis of archival research, interviews with witnesses and the study of specialist literature, the reader is introduced to the interventions in St. Vitus Cathedral and the associated change in the space for the celebration of the liturgy, as well as the space for ordinary visitors to this church during the period under study. Further attention is given to the unrealised designs and other sacred buildings in the grounds of the Castle.
The Prevalence and The Association of Antibiotic Practices with Surgical Site Infection Following Cesarean Section
Authors: Hussein Maiga Ayub , Sutiningsih Dwi , Ntambi Saidi , Frida Chebet
Published: September 2024

Background: This study focuses on Cesarean section (CS) procedures and the associated risk of surgical site infections (SSIs). The global CS rate is currently at 21%, higher than the recommended 15%, leading to an increased risk of SSIs. These infections are a significant burden on economies, healthcare systems, patients, and their families, despite being preventable. The research aims to address the issue in Uganda, where the burden of SSIs stands at 15.5%. While previous studies have examined various risk factors, such as age, parity, surgeon expertise, and antiseptic solutions, there is a lack of research on pre- and post-CS antibiotic practices and their connection to SSIs. This study seeks to establish the prevalence of SSIs and evaluate the antibiotic practices before and after CS procedures at Mbale Regional Referral Hospital from January 1, 2020, to December 31, 2022.Methods: The design was retrospective cross-sectional. Consecutively selected 104 patient files that developed SSIs and randomly an equal number of patient files that did not develop SSIs to make up a sample size of 208 files that were reviewed at Mbale regional referral hospital (MRRH) from 1st –January -2020 to 31st -December-2022.Result: The prevalence of surgical site infections (SSIs) was 4.3%. Among the 208 patient files reviewed, 71.2% received antibiotic prophylaxis, with intravenous ceftriaxone being the most common (47.1%). However, only 14.9% received prophylaxis within the recommended 30-60 minutes before incision. Post-cesarean section, 92.8% received intravenous ceftriaxone and metronidazole, and the mean hospital stay was 2.74 days. Factors significantly associated with reduced SSI risk were the timing of antibiotic prophylaxis, administration of intravenous antibiotics post-cesarean, oral antibiotics post-cesarean, duration of hospital stay, and the cadre of the surgeonConclusion: The prevalence of surgical site infections (SSIs) at Mbale Regional Referral Hospital (MRRH) was found to be 4.3%. This study highlighted several factors that were associated with a reduced risk of SSIs in women undergoing Cesarean section (CS), including timely administration of antibiotic prophylaxis within 30-60 minutes before the incision, the use of post-CS intravenous (IV) ceftriaxone and metronidazole, hospital stays of 3 days, oral cefixime upon discharge, and being operated on by a medical officerRecommendation: The study emphasizes the importance of medical professionals following guidelines and acquiring knowledge on appropriate antibiotic use to combat surgical site infections (SSIs) following cesarean sections. Adhering to guidelines and continuous education is crucial in preventing SSIs and addressing antibiotic resistance
Factors Associated with Chlamydia Infection among Female Sex Workers in West Jakarta: Analysis of the 2018-2019 Integrated Biological and Behavioral Survey
Authors: Karamy Selma Eliana , Sudaryo Mondastri Korib
Published: September 2024

Background: Chlamydia is one of the most common sexually transmitted infections globally. Female sex workers (FSW), especially in urban areas, face a higher risk of infection due to their risky work environment and lifestyle. Jakarta is a city that has cosmopolitan and urban characteristics with an active sex industry. This research was conducted to determine the factors associated with the incidence of chlamydia infection among FSWs in West Jakarta.Methods: The research was conducted using a cross-sectional design by analyzing data from the 2018-2019 Integrated Biological and Behavioral Survey (IBBS). The data were analyzed using univariate and bivariate analysis with the chi-square test. Prevalence ratio (PR) was used as the measure of association.Results: Of the 283 FSWs involved in the study, the positivity rate of chlamydia infection in West Jakarta reached 42.8%. Significant risk factors for chlamydia infection among FSWs in West Jakarta include younger age, divorced status, recently becoming a sex worker, and having ≥ 5 customers per week.Conclusion: The high rate of chlamydia infection among FSWs in West Jakarta highlights the need to increase outreach to FSWs in order to educate them about STIs and encourage them to perform regular screenings, especially for young FSWs.
Multi‐compartment V/Q lung modeling: Log normal distributions of inspired or expired alveolar gas?
Authors: Scott Peter H. , Morgan Thomas J.
Published: September 2024

Using a 50‐compartment Python‐coded mathematical lung model, we compared mixed venous blood flow (Q) distributions and arterial oxygen tension/inspired oxygen fraction (PaO2/FiO2) relationships in lungs modeled with log normal distributions (LND) of inspired (VI) versus expired (VA) alveolar gas volumes. In lungs with normal V/Q heterogeneity, Q versus VA/Q and Q versus VI/Q distributions were similar with either approach, and PaO2/FiO2 sequences remained indistinguishable. In V/Q heterogeneous lungs at high FiO2, VILND generated low Q versus VA/Q shoulders and some negative VA units, while VALND preserved Q versus VA/Q log normality by blood flow diversion from low VI/Q units. We managed VILND‐induced negative VA units either by shunt conversion (VI decreased to 0) or VI redistribution simulating collateral ventilation (VI increased till VA = 0). Comparing oxygen transfer: VALND > VILND (redistribution) > VILND (shunt). In V/Q heterogeneous lungs VALND and VILND (redistribution) regained near optimal oxygen transfer on 100% oxygen, while impairment persisted with VILND (shunt). Unlike VALND, VILND (redistribution) produced Q versus VA/Q distributions in V/Q heterogeneity compatible with multiple inert gas (MIGET) reports. VILND (redistribution) is a physiologically–based MIGET–compatible alternative to West's original VALND lung modeling approach.
On the regularity of optimal potentials in control problems governed by elliptic equations
Authors: Buttazzo Giuseppe , Casado-Díaz Juan , Maestre Faustino
Published: September 2024

In this paper we consider optimal control problems where the control variable is a potential and the state equation is an elliptic partial differential equation of Schrödinger type, governed by the Laplace operator. The cost functional involves the solution of the state equation and a penalization term for the control variable. While the existence of an optimal solution simply follows by the direct methods of the calculus of variations, the regularity of the optimal potential is a difficult question and under the general assumptions we consider, no better regularity than the

BV

\mathrm{BV}

one can be expected. This happens in particular for the cases in which a bang-bang solution occurs, where optimal potentials are characteristic functions of a domain. We prove the

BV

\mathrm{BV}

regularity of optimal solutions through a regularity result for PDEs. Some numerical simulations show the behavior of optimal potentials in some particular cases.
Non-plug-in estimators could outperform plug-in estimators: a cautionary note and a diagnosis
Authors: Qiu Hongxiang
Published: September 2024

Objectives

Highly flexible nonparametric estimators have gained popularity in causal inference and epidemiology. Popular examples of such estimators include targeted maximum likelihood estimators (TMLE) and double machine learning (DML). TMLE is often argued or suggested to be better than DML estimators and several other estimators in small to moderate samples – even if they share the same large-sample properties – because TMLE is a plug-in estimator and respects the known bounds on the parameter, while other estimators might fall outside the known bounds and yield absurd estimates. However, this argument is not a rigorously proven result and may fail in certain cases.

Methods

In a carefully chosen simulation setting, I compare the performance of several versions of TMLE and DML estimators of the average treatment effect among treated in small to moderate samples.

Results

In this simulation setting, DML estimators outperforms some versions of TMLE in small samples. TMLE fluctuations are unstable, and hence empirically checking the magnitude of the TMLE fluctuation might alert cases where TMLE might perform poorly.

Conclusions

As a plug-in estimator, TMLE is not guaranteed to outperform non-plug-in counterparts such as DML estimators in small samples. Checking the fluctuation magnitude might be a useful diagnosis for TMLE. More rigorous theoretical justification is needed to understand and compare the finite-sample performance of these highly flexible estimators in general.
Discrete Ω-results for the Riemann zeta function
Authors: Minelli Paolo , Sourmelidis Athanasios
Published: September 2024

We study lower bounds for the Riemann zeta function

ζ
⁢

(
s
)

{\zeta(s)}

along vertical arithmetic progressions in the right-half of the critical strip.
We show that the lower bounds obtained in the discrete case coincide, up to the constants in the exponential, with the ones known for the continuous case, that is when the imaginary part of s ranges on a given interval.
Our methods are based on a discretization of the resonance method for estimating extremal values of

ζ
⁢

(
s
)

{\zeta(s)}

.
Big pure projective modules over commutative noetherian rings: Comparison with the completion
Authors: Herbera Dolors , Příhoda Pavel , Wiegand Roger
Published: September 2024

A module over a ring R is pure projective provided it is isomorphic to a direct summand of a direct sum of finitely presented modules. We develop tools for the classification of pure projective modules over commutative noetherian rings. In particular, for a fixed finitely presented module M, we consider

Add
⁡

(
M
)

{\operatorname{Add}(M)}

, which consists of direct summands of direct sums of copies of M. We are primarily interested in the case where R is a one-dimensional, local domain, and in torsion-free (or Cohen–Macaulay) modules. We show that, even in this case,

Add
⁡

(
M
)

{\operatorname{Add}(M)}

can have an abundance of modules that are not direct sums of finitely generated ones.
Our work is based on the fact that such infinitely generated direct summands are all determined by finitely generated data. Namely, idempotent/trace ideals of the endomorphism ring of M and finitely generated projective modules modulo such idempotent ideals. This allows us to extend the classical theory developed to study the behaviour of direct sum decomposition of finitely generated modules comparing with their completion to the infinitely generated case.
We study the structure of the monoid

V
*

⁢

(
M
)

{V^{*}(M)}

, of isomorphism classes of countably generated modules in

Add
⁡

(
M
)

{\operatorname{Add}(M)}

with the addition induced by the direct sum. We show that

V
*

⁢

(
M
)

{V^{*}(M)}

is a submonoid of

V
*

⁢

(

M

⊗
R

R
^

)

{V^{*}(M\otimes_{R}\widehat{R})}

, this allows us to make computations with examples and to prove some realization results.
Is addition definable from multiplication and successor?
Authors: Wehrung Friedrich
Published: September 2024

A map

f
:

R
→
S

{f\colon R\to S}

between (associative, unital, but not necessarily commutative) rings is a brachymorphism if

f
⁢

(

1
+
x

)

=

1
+

f
⁢

(
x
)

{f(1+x)=1+f(x)}

and

f
⁢

(

x
⁢
y

)

=

f
⁢

(
x
)

⁢
f
⁢

(
y
)

{f(xy)=f(x)f(y)}

whenever

x
,
y

∈
R

{x,y\in R}

.
We tackle the problem whether every brachymorphism is additive (i.e.,

f
⁢

(

x
+
y

)

=

f
⁢

(
x
)

+

f
⁢

(
y
)

{f(x+y)=f(x)+f(y)}

), showing that in many contexts, including the following, the answer is positive:

•

R is finite (or, more generally, R is left or right Artinian);

•

R is any ring of

2
×
2

{2\times 2}

matrices over a commutative ring;

•

R is Engelian;

•

every element of R is a sum of π-regular and central elements (this applies to π-regular rings, Banach algebras, and power series rings);

•

R is the full matrix ring of order greater than 1 over any ring;

•

R is the monoid ring

K
⁢

[
M
]

{K[M]}

for a commutative ring K and a π-regular monoid M;

•

R is the Weyl algebra

𝖠
1

⁢

(
K
)

{\mathsf{A}_{1}(K)}

over a commutative ring K with positive characteristic;

•

f is the power function

x
↦

x
n

{x\mapsto x^{n}}

over any ring;

•

f is the determinant function over any ring R of

n
×
n

{n\times n}

matrices, with

n
≥
3

{n\geq 3}

, over a commutative ring, such that if

n
>
3

{n>3}

, then R contains n scalar matrices with non zero divisor differences.
Analysis of the intensity of erosive processes and state of vegetation cover in the zone of influence of the Kolubara Mining Basin
Authors: Živanović Milica , Milanović Miško M. , Trivić Branislav , Đurđić Snežana , Milinčić Miroljub , Tomić Milisav , Grozdanić Goran
Published: September 2024

Ensuring the quality protection of geospatial elements entails environmental control, a task unattainable without precise measurement results. This article aims to conduct a spatio-temporal analysis of soil degradation and vegetation status within the influence zone of the Kolubara Mining Basin in Serbia. Remote sensing is employed to assess vulnerability to erosion using the erosion potential method. A geographic information system environment is utilized to generate an erosion map, illustrating erosive processes across different time periods, particularly comparing the present situation (2022) to 1983. Results indicate that observed areas are experiencing erosion due to changes in land use. Furthermore, this study investigates the use of the normalized difference vegetation index to monitor vegetation cover changes from 1992 to 2022. The objective is to demonstrate that these methods effectively depict degradation levels and vegetation status in the area. This comprehensive overview provides insights into the changes occurring across the analyzed years. Such insights are crucial for informing future efforts to restore the region to its natural state prior to lignite mining.
On a nonlinear general eigenvalue problem in Musielak–Orlicz spaces
Authors: Kassimi Soufiane , Sabiki Hajar , Moussa Hicham
Published: September 2024

In this paper, we concern the existence result of the following general eigenvalue problem:

{

𝒜
⁢

(
u
)

=

λ
⁢
ℬ
⁢

(
u
)

in 
⁢
Ω

,

D
α

⁢

(
u
)

=
0

on 
⁢

∂
⁡
Ω

,

\left\{\begin{aligned} \displaystyle{}\mathcal{A}(u)&\displaystyle={\lambda}%
\mathcal{B}(u)&&\displaystyle\phantom{}\text{in }{\Omega},\\
\displaystyle D^{\alpha}(u)&\displaystyle=0&&\displaystyle\phantom{}\text{on }%
{\partial\Omega},\end{aligned}\right.

in an arbitrary Musielak–Orlicz spaces, where

𝒜

{\mathcal{A}}

and

ℬ

{\mathcal{B}}

are quasilinear operators in divergence form of order

2
⁢
n

{2n}

and

2
⁢

(

n
-
1

)

{2(n-1)}

, respectively. The main assumptions in this case are that

𝒜

{\mathcal{A}}

and

ℬ

{\mathcal{B}}

are potential operators with

𝒜

{\mathcal{A}}

being elliptic and monotone. In this study, we intentionally avoid imposing constraints on the growth of a generalized N-function, including the

Δ
2

{\Delta_{2}}

-condition for both the generalized N-function and its conjugate. Consequently, this necessitates the formulation of the approximation theorem and the extensive utilization of modular convergence concepts.
Wood density and chemical composition variation of Eucalyptus urophylla clone in different environments
Authors: Bento dos Santos Vaniele , Vieira Rocha Maria Fernanda , Rodrigues Guimarães João Filipi , Soares Oliveira Leonardo Sarno , Felix de Almeida Maria Naruna , Marques Cirilo Nauan Ribeiro , Castor Neto Thayanne Caroline , Macedo Ladeira Carvalho Ana Márcia , Vidaurre Graziela Baptista
Published: September 2024

Variability in Eucalyptus wood density and chemical properties is crucial to understanding important factors for the forest-based industry, such as sampling methods and wood suitability as raw material. This study aimed to evaluate the basic density and chemical composition of the radial positions of young wood from the Eucalyptus urophylla clone grown under different precipitation levels. Trees from E. urophylla clonal plantations were collected in Inhambupe, Jandaíra and Itanagra, Bahia State, Brazil. Trees’ basic density and chemical composition (total extractive, lignin, hemicelluloses and α-cellulose) were determined based on the basal log of each tree, at four radial positions (1, 2, 3 and 4). It was found that the basic density and α-cellulose of wood are influenced by the cambial age and the site rainfall. There was greater increase in sections close to the bark (positions 1 and 4) and in more humid environments (sites Itanagra and Jandaríra). This finding highlights the association between wood basic density and chemical composition, mainly in the holocellulose content.
Structural and electrochromic property control of WO3 films through fine-tuning of film-forming parameters
Authors: Lin Gai , Li Xiaobo , Liu Dexi , Jiao Zibao , Liu Peijiang
Published: September 2024

Tungsten trioxide (WO3) films, extensively investigated for their remarkable electrochromic properties, have proven to be highly versatile in numerous applications. However, the challenge of achieving large-scale WO3 films with substantial dimensions and volumes remains a critical obstacle for industrial-scale production. Among the available techniques, magnetron sputtering stands out as the most efficient and straightforward method for the industrial preparation of WO3 films. In this comprehensive study, we meticulously explored the impact of various process parameters in magnetron sputtering on the film formation properties. By employing a controlled variable approach, we systematically investigated the influence of gas flow (Ar), sputtering pressure, power, and time. Our meticulous observations revealed that each parameter exerted distinct effects on the intricate film formation process. Careful analysis of the final dataset unequivocally demonstrated that when the sputtering conditions were meticulously optimized, the resulting films exhibited an extraordinary maximum transmittance change of 85% at a specific wavelength of 0.6 μm. Furthermore, these films showcased rapid coloring and bleaching response times, clocking in at an impressive 15 and 20 s, respectively, without any significant degradation even after undergoing 5,000 cycles. These groundbreaking findings provide invaluable insights into the intricate film formation process associated with magnetron-sputtered WO3.
Ozone processing of milk and milk products: a review of applications, quality effect and implementation challenges
Authors: Vashisht Pranav , Verma Digvijay , Singh Lovepreet , Saini Gursharn Singh , Sharma Sonali , Charles Anto Pradeep Raja , Mahanta Shikhadri , Mahanta Snehadri , Singh Khushi , Gaurav Gaurav , Kaur Jaspreet
Published: September 2024

The impact on the natural characteristics of dairy products during thermal processing warrants the investigation of non-thermal techniques. Ozone has proved to be an effective and sustainable processing technology for the dairy processing sector. This review delves into the effect of ozone processing on the microbiological, physiochemical, nutri-functional, and sensory quality of milk and milk products. Alongside this, the other ozone applications in the dairy processing sector (storage room disinfection, wastewater treatment, benefits in Clean-in-Place (CIP) system, toxin reduction) have been discussed. Current regulatory and industrial status, and safety requirements in the facility have also been highlighted. Overall, ozone treatment has lower microbial inactivation efficiency in milk and milk products than thermal treatment. Further, safety precautions are needed in the processing areas due to its potential health hazard concerns.
Assessment on the influence of FDM process parameters on the mechanical properties of PLA samples
Authors: Kumar Madheswaran Sangeeth , Venkatesh Raja K.
Published: September 2024

The manufacturing of functional parts from the fused deposition modeling 3D printer is limited due to poor mechanical properties, low surface finish, and huge production time. During 3D printing of prototypes, the time consumption of printing and mechanical properties of the model is directly proportional. The fused deposition modeling process parameters significantly impact the quality of printed parts. The prime objective of this research is to optimize the process parameters of a 3D printing machine (wall thickness, infill percentage, infill pattern, and infill speed) using polylactic acid material to enhance the mechanical properties with less printing time of the 3D printing model. The ultimate tensile strength and elongation of the 3D printed samples are used to evaluate the mechanical properties of the various slicing process parameters as per the standards. From the results, it is evident that the mechanical properties of the 3D printed materials increased significantly. The magnitude of ultimate tensile strength is reported as 39.972 MPa with a printing time of 28 min. From close observation, it is evident that lower infill speeds with gyroid infill pattern produce the highest ultimate tensile strength of all combinations. Also, optimal results are derived at higher wall thickness and higher infill percentage. In addition to that, finite element analysis was carried out for different infill percentages of the specimen to validate the actual result.
Association between partial remission phase in type 1 diabetes and vitamin D receptor Fok1 rs2228570 polymorphism
Authors: Masoud Randa Mahmoud , Abdel-Kader Nour Mohamed , Abdel-Ghaffar Abdel-Rahman B. , Moselhy Said Salama , Elhenawy Yasmine Ibrahim
Published: September 2024

Objectives

The aim of the current study was to assess the natural course of partial remission (PR) phase of type 1 diabetes (T1D) and to highlight the putative association between vitamin D receptor (VDR) (Fok1) gene polymorphism and PR phase.

Methods

Ninety participants with newly diagnosed T1D were followed up for a total of 12 months. The VDR (Fok1) rs2228570 gene polymorphism was genotyped using allelic discrimination (AD) assay.

Results

Fifty-four patients (60 %) reached PR with an average duration of 5.63 ± 2.9 months. Among remitters, the frequency of CC “FF” genotype and allelic frequency of C “F” were significantly higher (p<0.001). Furthermore, participants expressing “CC” genotype had earlier onset of PR and spent a significantly longer duration in remission (p<0.001). Younger age (p<0.001; OR 41.6; CI 12.12–142.99), absence of DKA (p<0.001; OR 16, CI 4.36–50.74), higher C-peptide levels (p<0.001; OR 19.55; CI 6.52–58.63), and presence of CC “FF” genotype of VDR (p<0.001; OR 6.74; CI 2.41–18.86) best predicted the overall occurrence of PR.

Conclusions

Younger age, less extent of metabolic derangements, and expression of a CC “FF” genotype were found to influence the occurrence of PR. Data from the current study showed that the “C” allele could have a protective role on preserving residual β-cell mass and could predict both onset and duration of PR among newly diagnosed T1D. These findings support the growing concept of future tailored precision medicine.
The moving project: exploring language, migration, and identity using participatory podcasting during the COVID-19 pandemic
Authors: Durkacz Ryan Sadie
Published: September 2024

I make Accentricity, a podcast exploring language and identity. After releasing series 1 in 2019, I began to plan ways to take a more participatory approach to the creation of a second series, involving contributors in the production process as co-creators. The result was The Moving Project: a podcasting course and mentorship programme designed to help people tell personal stories about language, migration, and identity. Over a period of six months, the participants developed their audio-recording, editing, and digital storytelling skills. Together we created a podcast series which tells diverse and complex stories about migration, language, and identity, from a range of different geographical, social, and historical contexts. Like the first series of Accentricity, The Moving Project provides information about language to a public audience in an accessible format. However, it goes much further than the first series in centring non-academic perspectives and in developing participatory and inclusive methods for knowledge co-production.
Exploring neuroglial signaling: diversity of molecules implicated in microglia-to-astrocyte neuroimmune communication
Authors: Mohammad Zainab B. , Yudin Samantha C. Y. , Goldberg Benjamin J. , Serra Kursti L. , Klegeris Andis
Published: September 2024

Effective communication between different cell types is essential for brain health, and dysregulation of this process leads to neuropathologies. Brain glial cells, including microglia and astrocytes, orchestrate immune defense and neuroimmune responses under pathological conditions during which interglial communication is indispensable. Our appreciation of the complexity of these processes is rapidly increasing due to recent advances in molecular biology techniques, which have identified numerous phenotypic states of both microglia and astrocytes. This review focuses on microglia-to-astrocyte communication facilitated by secreted neuroimmune modulators. The combinations of interleukin (IL)-1α, tumor necrosis factor (TNF), plus complement component C1q as well as IL-1β plus TNF are already well-established microglia-derived stimuli that induce reactive phenotypes in astrocytes. However, given the large number of inflammatory mediators secreted by microglia and the rapidly increasing number of distinct functional states recognized in astrocytes, it can be hypothesized that many more intercellular signaling molecules exist. This review identifies the following group of cytokines and gliotransmitters that, while not established as interglial mediators yet, are known to be released by microglia and elicit functional responses in astrocytes: IL-10, IL-12, IL-18, transforming growth factor (TGF)-β, interferon (IFN)-γ, C–C motif chemokine ligand (CCL)5, adenosine triphosphate (ATP), l-glutamate, and prostaglandin E2 (PGE2). The review of molecular mechanisms engaged by these mediators reveals complex, partially overlapping signaling pathways implicated in numerous neuropathologies. Additionally, lack of human-specific studies is identified as a significant knowledge gap. Further research on microglia-to-astrocyte communication is warranted, as it could discover novel interglial signaling-targeted therapies for diverse neurological disorders.