bluuebunny/crossref_metadata_2025 huggingface dataset:
An efficient algorithm for two-stage capacitated time minimization transportation problem with restricted flow
Authors: Kaur Supinder , Jain Ekta , Sharma Anuj , Dahiya Kalpana
Published: April 2024

This paper discusses a two-stage capacitated time minimization transportation problem with the restricted flow (TSCTMTP-F) in which the transportation takes place in two stages and only a specified amount of commodity is transported in both stages. The total amount F1 is transported during Stage-I and F2 during Stage-II, and the objective is to minimize the sum of the transportation times for Stage-I and Stage-II. In 2017, Kaur et al. [RAIRO-Oper. Res. 51 (2017) 1169–1184] studied this problem and developed a polynomially bounded iterative algorithm (Algorithm-A) to solve TSCTMTP-F. However, their proposed algorithm has some flaws and may not always yield an optimal solution to the problem TSCTMTP-F. An improved iterative algorithm (Algorithm-C) is proposed in this paper that guarantees an optimal solution to the problem. Various theoretical results prove the convergence and efficiency of Algorithm-C to obtain an optimal solution to the problem TSCTMTP-F. Numerical problems are included in the support of theory along with a counter-example for which Algorithm-A fails to obtain its optimal solution. Computational experiments on a variety of test problems have been carried out to validate the convergence and efficiency of Algorithm-C.
Um novo método de fixação do enxerto para a cabeça fibular na reconstrução do ligamento colateral lateral do joelho: Nota técnica
Authors: Uluöz Mesut
Published: April 2024

O ligamento colateral lateral (LCL) é o estabilizador lateral mais forte do joelho. Ele fornece suporte contra o estresse varus e a rotação de posterolateral do joelho. As lesões de LCL ocorrem principalmente com lesões do ligamento cruzado anterior e/ou posterior. Enquanto as lesões grau 1 e 2 são tratadas de forma conservadora, uma vez que são lesões parciais, rupturas totais, como no grau 3, requerem tratamento cirúrgico. Utilizam-se enxertos isquiotibiais nos métodos convencionais de reconstrução da LCL e bioscrews na fixação do tendão ósseo. A reconstrução do LCL é geralmente realizada como um componente de cirurgia de ligamento múltiplo. Portanto, há necessidade de um tendão contralateral ou aloenxerto. O presente artigo tem como objetivo definir uma técnica que não exija enxertos tendíneos e bioscrews na fixação fibular.
O tamanho da glenosfera não importa na artroplastia total reversa de ombro
Authors: Patel Akshar V. , White Christopher A. , Li Troy , Parsons Bradford O. , Flatow Evan L. , Cagle Paul J.
Published: April 2024

Objetivo Até agora, poucos estudos relataram os desfechos da artroplastia total reversa (ATR) de ombro com coortes estratificadas pelo tamanho da glenosfera. O objetivo deste estudo é investigar o papel do tamanho da glenosfera nos desfechos pós-operatórios.

Métodos O estudo incluiu pacientes submetidos à ATR de ombro desde 1987 com acompanhamento mínimo de 2,0 anos. Os pacientes foram estratificados em duas coortes com base no tamanho da glenosfera (36 mm ou 40 mm). A amplitude de movimento, os desfechos relatados pelo paciente e as variáveis radiográficas (morfologia pré-operatória da glenoide, incisura escapular e instabilidade do úmero) foram avaliados.

Resultados Todas as medidas de amplitude de movimento, à exceção da rotação interna, melhoraram de forma significativa entre o período pré-operatório e pós-operatório nas duas coortes. Não houve diferenças significativas na amplitude de movimento pós-operatória, pontuação da American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form (ASES) ou escala visual analógica (EVA) de dor entre as duas coortes. De modo geral, a elevação anterior melhorou para 134° ± 16° na coorte de 36 mm e 133° ± 14° na coorte de 40 mm (p = 0,47). A rotação externa melhorou para 37° ± 13° em pacientes da coorte de 36 mm e 35° ± 19° em pacientes da coorte de 40 mm (p = 0,58). A rotação interna aumentou 1,3 níveis vertebrais na coorte de 36 mm e 2,3 níveis vertebrais na coorte de 40 mm. No último acompanhamento, a coorte de 36 mm apresentou EVA de 2 ± 2, ASES de 66 ± 19 e pontuação do Simple Shoulder Test (SST) de 6 ± 3. Da mesma forma, a coorte de 40 mm teve EVA de 2 ± 3, ASES de 77 ± 28 e SST de 9 ± 3.

Conclusões A ATR de ombro causa melhoras sustentadas da amplitude de movimento e função articular independentemente do tamanho da glenosfera.

Nível de Evidência III.
Descrição de técnica de reconstrução do ligamento cruzado anterior com tenodese ântero-lateral tipo mini-Lemaire através de túnel único femoral
Authors: Moro Ricardo , Thá Victor de Carvalho , Ruedas Vinícius Rossoni , Tauchmann Roberto , Dantas Gustavo Meira , Filho Mohty Domit
Published: April 2024

A lesão do ligamento cruzado anterior (LCA) causa instabilidade anteroposterior e rotatória do joelho. Reconstruções isoladas intra-articulares muitas vezes não obtêm controle rotacional satisfatório, mantendo queixa de instabilidade e impondo ao neoligamento um maior estresse. Pacientes jovens, com alta demanda atlética e com pivot-shift grau 2 ou 3 apresentam um maior risco de rerrotura após reconstrução isolada do LCA. Ao longo dos anos diversas técnicas foram desenvolvidas na tentativa de mitigar tais situações. Dentre as técnicas descritas, uma das mais utilizadas é a Tenodese extra-articular Lateral tipo Lemaire modificada ou “mini-Lemaire”. Estudos biomecânicos demonstram versatilidade da técnica devido a seu comportamento relativamente isométrico em graus de flexão de 0-60° quando a fita é introduzida profundamente ao ligamento colateral lateral, com possibilidade de fixação em diferentes posições anatômicas no côndilo femoral lateral e em diferentes graus de flexão. O objetivo do estudo é descrever uma técnica acessível, reprodutível e dependente de material amplamente disponível em nosso meio.
Validação transcultural da Escala de Mindset Direcionado à Saúde no Brasil
Authors: Queiroga Brunno Nóbrega , Ravanelli Thiago Batista , Braga Lucas Vendas Maluf , Alexandre Murilo , Mendonça Rodrigo Góes Medea de , Meves Robert
Published: April 2024

Objetivo Validar transculturalmente a escala de mindset da saúde para o Brasil, bem como adaptar os termos e questionários para a adequada compreensão do brasileiro, utilizando a análise fatorial como instrumento para validar a sua confiabilidade.

Métodos Validação transcultural da Health Mindset Scale para o português brasileiro através do método do Beaton, cálculo do alfa de Cronbach e análise fatorial

Resultados Amostra foi composta por 215 pacientes com idades entre 18 e 87 anos (M = 41,98; DP = 15,72), sendo a média de idade entre 31 e 50 anos (42,0%), e do sexo feminino (52,6%), uma diferença marginalmente significativa (p < 0,10) entre homens e mulheres foi observada para o item 3. Nesse item a média dos homens (M = 5,48; DP = 0,99) foi maior do que a média das mulheres (M = 5,10; DP = 1,22), com tamanho de efeito para diferença pequeno (d = 0,26). O coeficiente de correlação r de Pearson foi examinado entre o escore médio e a idade (r = −0,21; p = 0,002), cujo resultado indicou relação linear fraca, negativa e significativa. Quanto maior a idade, menor o escore médio na Health Mindset Scale.

Conclusão A versão da escala de mindset direcionada à saúde para o português brasileiro foi apresentada e validade transculturalmente, apresentando bom coeficiente de confiabilidade – alfa de Cronbach 0,786. Sendo assim, configura novo instrumento para a prática clínica e pode ser correlacionado escalas já consagradas na literatura.
Infiltração periarticular comparada ao bloqueio do nervo femoral único na artroplastia total de joelho: Um estudo prospectivo randomizado
Authors: Lopes Júnior Osmar Valadão , Viana Juliano Munhoz , Carvalho Juliany Aguirre de , Folle Bruno Lunardi , Kuhn Vinícius Canelo , Saggin Paulo Renato Fernandes
Published: April 2024

Objetivo Avaliar pacientes submetidos a artroplastia total do joelho (ATJ) sob raquianestesia e bloqueio do nervo femoral (BNF) único e comparar com pacientes que submetidos a ATJ sob raquianestesia e infiltração periarticular (IPA).

Materiais e Métodos Um total de 100 pacientes submetidos a ATJ foram randomizados em dois grupos. O grupo 1 incluiu pacientes submetidos a ATJ sob BNF associado à raquianestesia, ao passo que o grupo 2 incluiu pacientes submetidos a ATJ sob IPA associada à raquianestesia. Os indivíduos foram avaliados no pós-operatório precoce quanto à dor, à flexão e extensão ativas, à elevação do membro estendido e ao uso de morfina.

Resultados Não se observou diferença significativa associada ao tipo de analgesia em relação à dor, à elevação do membro em extensão e ao consumo de morfina. Houve melhor flexão e extensão ativas no grupo que recebeu IPA (p = 0,04 e p = 0,02, respectivamente).

Conclusão Concluímos que as técnicas utilizadas são semelhantes quanto ao controle da dor, à elevação de membro e ao uso de morfina. O uso de IPA proporcionou uma melhor flexão e extensão ativas durante o período de internação hospitalar comparado ao uso de BNF único em pacientes submetidos a ATJ.
Tradução, adaptação transcultural e validação da versão para o português brasileiro do Body Image Disturbance Questionnaire para escoliose (BR-BIDQ-S)
Authors: Matos Marcos Almeida , Freitas Maria Clara , Fernandes Rony Britto , Oliveira Luís Fernando Weber de , Meves Robert
Published: April 2024

Objetivo O questionário BIDQ-S para escoliose se originou a partir do Body Image Disturbance Questionnaire (BIDQ) e representa a versão adaptada e validada especificamente em pacientes com escoliose. Este instrumento, a despeito da sua aplicabilidade e importância, ainda não tem versão para uso no Brasil. O presente estudo teve como objetivo traduzir, adaptar transcuturalmente e validar o BIDQ-S para o português brasileiro.

Método Foi realizado estudo de tradução adaptação transcultural e validação do instrumento Body Image Disturbance Questionnaire-Scoliosis version (BIDQ-S) para o português brasileiro, utilizando os critérios recomendados pela American Association of Orthopedic Surgeon (AAOS). A validação do instrumento foi realizada por meio de consistência interna e confrontando-se com ângulo de Cobb, Pediatric Quality of Life Inventory (PedsQL) e Scoliosis Research Society (SRS-22). O BR-BIDQ-S (versão brasileira) foi validado em um grupo de 35 adolescentes portadores de escoliose idiopática do adolescente que se encontravam na fila de espera para tratamento.

Resultados A consistência interna do Br-BIDQ-S foi de 0,899 medido pelo coeficiente Alfa de Cronbach (considerada quase perfeita). Não houve correlação com o ângulo de Cobb, contudo o Br-BIDQ-S teve correlação com os domínios Dimensão Física, Dimensão Emocional e Dimensão Social do PedsQL e também com a Dimensão Função/Atividade do SRS-22.

Conclusão O Br-BIDQ-S mostrou-se confiável para avaliar a imagem corporal de adolescentes com escoliose, com validade interna de 0,899 (considerada quase perfeita), similar àquela do instrumento original, havendo correlação com o PedsQL e com o SRS-22.
Notificações de maus-tratos em um hospital infantil: Avaliação do perfil epidemiológico e sua relação com o desfecho em fraturas
Authors: Andrade Janaína Romão de , Platt Vanessa Borges , Honicky Michele
Published: April 2024

Objetivo Descrever os casos suspeitos/confirmados de maus-tratos infantis relacionados a fraturas, atendidos em um hospital pediátrico no Sul do Brasil.

Método Estudo das notificações do Sistema de Informação de Agravos de Notificação e dos prontuários das vítimas, entre janeiro/2016 e dezembro/2020. Avaliadas variáveis relacionadas à vítima, ao autor, à tipologia de maus-tratos, à presença de fraturas e sua localização anatômica e óbito. Regressão logística foi realizada para identificar as variáveis relacionadas à fratura, ajustada para sexo e idade, expressa em razão de chance e seus respectivos intervalos de confiança de 95%. Foi considerado significativo p < 0.05.

Resultados Houve 276 casos, 73 lactentes (26,4%), predomínio do sexo masculino (151, 54,7%), com autoria dos maus-tratos por parentes (245, 96,0%), 85 (31,5%), apresentaram fraturas, sendo cinco óbitos (1,9%). Fatores relacionados à presença de fratura: idade da vítima (menor de dois anos; n = 82; RC 2,48; IC 95%: 1,45 - 4,25), ter mais de dois agressores envolvidos (n = 144; RC 2,09; IC 95%: 1,16 - 3,75), o meio ser trânsito/acidente automobilístico, (n = 52; RC 2,65; IC 95%: 1,04–6,75), consultar com ortopedista (n = 91; RC 6,77 / IC 95%: 3,66–12,51), e necessidade de intervenção cirúrgica (n = 15; RC 36,72; IC 95%: 8,22–164,03).

Conclusões Ressaltada a importância da suspeição e identificação precoce da agressão, o preenchimento correto das notificações, para o acionamento do sistema de garantia de direitos e afastamento do agressor.
Reconstrução combinada do ligamento cruzado anterior (RLCA) e tenodese extra-articular lateral pela técnica de Lemaire modificada versus RLCA isolada: Uma metanálise dos resultados clínicos
Authors: Damayanthi Essy Dwi , Kholinne Erica , Singjie Leonard Christianto , Sakti Muhammad , Anesstesia Ira Juliet
Published: April 2024

Objetivo A tenodese extra-articular lateral (TEL) foi proposta para resolver a instabilidade rotatória após a reconstrução do ligamento cruzado anterior (RLCA). Esta metanálise teve como objetivo comparar os resultados clínicos da RLCA e da RLCA com TEL por meio da técnica de Lemaire modificada.

Materiais e Métodos Esta metanálise foi feita de acordo com a declaração dos Itens Principais para Relatar Revisões Sistemáticas e Metanálises (Preferred Reporting Items for Systematic Reviews and Meta-Analysis, PRISMA, em inglês). A pesquisa bibliográfica foi realizada nos bancos de dados PubMed, EBSCOHost, Scopus, ScienceDirect e WileyOnline. Dos estudos incluídos foram extraídas informações sobre as características do estudo, a taxa de falha (falha clínica ou do enxerto) como resultado primário, e o escore funcional como resultado secundário. Foram feitas comparações entre os pacientes submetidos apenas à RLCA (grupo RLCA) e à RLCA e TEL pela técnica de Lemaire modificada (grupo RLCA + TEL).

Resultados Foram avaliados 5 estudos que incluíam 797 pacientes. O grupo RLCA + TEL apresentou um risco menor de falha e menor taxa de rerruptura do que o grupo RLCA (razão de risco [RR] = 0,44; intervalo de confiança de 95% [IC95%] 0,26 a 0,75; I2 = 9%; p = 0,003). O grupo RLCA + TEL obteve pontuações maiores no Escore de Desfechos de Osteoartrite e Lesão no Joelho (Knee Injury and Osteoarthritis Outcome Score, KOOS, em inglês) com relação aos seguintes desfechos: dor, atividades cotidianas (AC), esportes, e qualidade de vida (QV), com diferenças médias de 0,20 (IC95%: 0,10 a 0,30; I2 = 0%; p < 0,0001), -0.20 (IC95%: -0,26 a-0,13; I2
=0%; p < 0,00001), 0,20 (IC95%: 0,02 a 0,38; I2 = 0%; p = 0,03) e 0,50 (IC95%: 0,29 a 0,71; I2 = 0%; p < 0,00001), respectivamente, quando comparado com o grupo RLCA.

Conclusão O acréscimo de TEL pela técnica de Lemaire modificada à RLCA pode melhorar a estabilidade do joelho devido à menor taxa de rerruptura do enxerto e à superioridade dos resultados clínicos.

Nível de evidência I.
Influência dos parâmetros do túnel e do ângulo de inclinação do enxerto no desfecho clínico e radiológico no acompanhamento de longo prazo após a reconstrução artroscópica do ligamento cruzado anterior
Authors: Santhamoorthy Thatchinamoorthy , Xavier Anish Anto , Krun Kaliaperumal , Dubey Dharamveer Kumar
Published: April 2024

Objetivo O objetivo deste estudo foi analisar a influência de vários parâmetros do túnel e do ângulo de inclinação do enxerto (GIA, do inglês graft inclination angle) nos desfechos clínicos e radiológicos da reconstrução do ligamento cruzado anterior (RLCA) no acompanhamento de longo prazo.

Métodos Neste estudo retrospectivo, 80 pacientes com lesão isolada do ligamento cruzado anterior (LCA) submetidos à RLCA de feixe único com autoenxertos de tendão patelar ósseo (TPO) e isquiotibiais (IT) foram avaliados clínica e radiologicamente durante o acompanhamento em longo prazo. A população do estudo foi dividida em dois grupos com base nos parâmetros ideais ou não ideais do túnel, bem como no GIA ideal e não ideal. Os vários parâmetros do túnel e o GIA foram interpretados com os desfechos clínicos e radiológicos no acompanhamento em longo prazo.

Resultados Oitenta pacientes, sendo 36 (45%) submetidos ao procedimento com autoenxertos de TPO e 44 (55%) com autoenxertos IT, puderam completar o estudo. Pacientes com ângulo do túnel tibial coronal (ATTC) e ângulo do túnel femoral coronal (ATFC) ideais apresentam resultados clínicos superiores (teste de pivot shift) do que aqueles com ATTC e ATFC não ideais, sendo a diferença estatisticamente significativa (valor de p < 0,038 e 0,024, respectivamente). Da mesma forma, pacientes com posição do túnel tibial coronal (PTTC) ideal apresentam resultado clínico superior (International Knee Documentation Committee [IKDC] objetivo) em relação àqueles com PTTC não ideal (valor de p < 0,017). Os demais parâmetros do túnel e o GIA não influenciaram o desfecho clínico. Nenhum dos parâmetros do túnel influenciou a alteração associada à osteoartrite (OA). Não houve progressão da alteração da OA na população do estudo no acompanhamento em longo prazo após a RLCA.

Conclusão Os parâmetros ideais do túnel coronal produziram um melhor desfecho clínico no acompanhamento de longo prazo após a RLCA. Não houve progressão da alteração da OA no acompanhamento em longo prazo após a RLCA isolada.
Bloqueio pericapsular do quadril guiado por ultrassonografia em idosos com fratura do quadril no setor de emergência: Ensaio clínico
Authors: Fontes Gustavo Martins , Perez Marcelo Vaz , Miashiro Edson Hidenori , Neto Antonio Isidoro de Sousa , Grigio Thiago Ramos , Rodrigues Luiz Henrique Silveira
Published: April 2024

Objetivos Este estudo avaliou a intensidade da dor em idosos acometidos por fratura do quadril internados no setor de emergência e submetidos ao Pericapsular Nerve Group (PENG) block no pré-operatório. Ademais, o grau de flexão tolerável do quadril foi avaliado.

Métodos Ensaio clínico, prospectivo, aleatorizado e controlado em grupos paralelos. O grupo controle consiste em idosos com fratura do quadril, submetidos à analgesia sistêmica endovenosa padronizada. O grupo intervenção consiste em idosos com fratura do quadril submetidos ao PENG block e analgesia sistêmica padronizada. Os grupos foram avaliados em repouso e durante o movimento pela escala de dor Pain Assessment in Advance Dementia (PAINAD). Aferiram-se intensidade da dor e redução álgica, assim como o grau de flexão tolerável do quadril fraturado. Todos os pacientes foram avaliados previamente à administração de medicação ou bloqueio e aos 45 minutos, 12, 24 e 36 horas pós-medicação ou bloqueio.

Resultados No pré-operatório e 24 horas após o PENG block, idosos com fratura do quadril apresentaram redução significativa da dor em repouso ou movimento em comparação com o controle (p < 0,05), com 60% dos pacientes avaliados em repouso, demonstrando a redução álgica desejável de ≥ 50% e apenas 13,3% do grupo controle com redução álgica desejável. Durante o movimento, após o PENG block, 40% demonstraram redução álgica desejada e nenhum paciente do grupo controle apresentou a redução desejada. Verificou-se, também, no grupo intervenção a melhora significativa da flexão tolerável do quadril (p < 0,05).

Conclusão O PENG block no pré-operatório de idosos com fratura do quadril, internados no setor de emergência, proporcionou redução significativa da dor em comparação ao grupo controle.
Decoding violence against women: analysing harassment in middle eastern literature with machine learning and sentiment analysis
Authors: Low Hui Qi , Keikhosrokiani Pantea , Pourya Asl Moussa
Published: April 2024

The rising prevalence of harassment in Middle Eastern countries is mirrored in literary works from the region. However, extracting data from these texts to understand the typology and frequency of the cases poses a significant challenge due to human cognitive limitations and potential biases. Thus, this study aims to use natural language processing (NLP) approaches to propose a machine learning framework for text mining of sexual harassment content in literary texts. The data source for this study consists of twelve Middle Eastern novels. The proposed framework involves the classification of physical and non-physical types of sexual harassment using a machine-learning model. Lexicon-based sentiment and emotion detection are applied to sentences containing instances of sexual harassment for data labelling and analysis. Finally, a long short-term memory-gated recurrent unit (LSTM-GRU) deep learning model is built to classify the sentiment characteristics that induce sexual harassment. The proposed model achieved an accuracy of 75.8% while outperforming five other algorithms. Additionally, a sentiment classification with three labels—negative, positive, and neutral—was developed using an LSTM-GRU RNN deep learning model. The accuracy of this model was 84.5%. Most statements, even those involving physical sexual harassment, which had greater levels of sexual harassment, had negative sentiments, according to lexicon-based sentiment analysis. This study contributes to the field of text mining by providing a novel approach to identifying instances of sexual harassment in literature in English from the Middle East. The use of machine learning models and sentiment analysis techniques allows for more accurate identification and classification of different types of sexual harassment. Furthermore, this study sheds light on the prevalence of sexual harassment in Middle Eastern countries and highlights the need for further research and action to address this issue.
Intergenerational differences in the environmental concerns of plastic waste business owners: environmental knowledge, environmental risk exposure, and community connection as mediators
Authors: Wang Xuan , Wu Lingqiong
Published: April 2024

Promoting environmental concern among plastic waste entrepreneurs is a crucial step towards addressing the issue of plastic pollution effectively. To comprehend the techniques for enhancing environmental responsibility within this demographic, it is essential to examine the intergenerational shifts in environmental attitudes, which can provide valuable insights. This study investigates the intergenerational differences in two types of environmental concerns (i.e., ecological worldview and local environmental issue concern) by taking two generations of plastic waste business owners in Wuzhen Town, China, as a case. The roles of post-materialistic values, environmental knowledge, environmental risk exposure via new media, and community connection in mediating the relationships between generation and environmental concern were also examined in light of the Mindsponge theory. A paired-sample survey (N = 102) was utilized to collect data. The results of path analyses showed significant intergenerational differences in ecological worldview but insignificant intergenerational differences in local environmental issue concerns. While nondaily environmental knowledge and environmental risk exposure via new media significantly and positively mediated the relationship between generation and ecological worldview, community connection significantly and negatively mediated the relationship between generation and local environmental issue concern. Although a significant difference was found in the post-materialistic values between the two generations of plastic waste business owners, this variable did not significantly predict environmental concern.
Bridging systems biology and tissue engineering: Unleashing the full potential of complex 3D in vitro tissue models of disease
Authors: Cadavid Jose L. , Li Nancy T. , McGuigan Alison P.
Published: April 2024

Rapid advances in tissue engineering have resulted in more complex and physiologically relevant 3D in vitro tissue models with applications in fundamental biology and therapeutic development. However, the complexity provided by these models is often not leveraged fully due to the reductionist methods used to analyze them. Computational and mathematical models developed in the field of systems biology can address this issue. Yet, traditional systems biology has been mostly applied to simpler in vitro models with little physiological relevance and limited cellular complexity. Therefore, integrating these two inherently interdisciplinary fields can result in new insights and move both disciplines forward. In this review, we provide a systematic overview of how systems biology has been integrated with 3D in vitro tissue models and discuss key application areas where the synergies between both fields have led to important advances with potential translational impact. We then outline key directions for future research and discuss a framework for further integration between fields.
Applications of quantum circuit learning model using particle-number-conserving state on quantum chemical calculations
Authors: Nishida Y. , Aiga F.
Published: April 2024

Although the variational quantum eigensolver is a typical quantum algorithm utilized in near-term quantum devices, many measurements are required in an iterative closed feedback loop between the classical and quantum computers to obtain sufficient accuracy. In this study, we attempt to construct a quantum circuit learning model to infer potential energy surfaces and atomic forces without using the iterative loop to optimize parameters for every bond length. To realize a high, accurate inference performance, measurement is introduced in the middle of the circuit. When the proposed quantum circuit learning model is applied to the H2 molecule, the energies and atomic forces can be estimated with high accuracy in a single feed-forward calculation with varying bond lengths. A nonlinear relation between outcomes from data-encoding layer and inputs can also be used to eliminate the data-encoding layer, allowing for our quantum circuit model with lower learning costs by reducing the number of parameters to be optimized. Our model can be also extended to six-qubit systems, such as the H3 molecule, and to the water molecule with two internal degrees of freedom. Finally, we use the IBM Quantum backend to perform inference with a real quantum computer and show the effect of noise on the actual quantum device.
Characterization of NiOAg thin film applicated as photocatalyst for degradation of methylene blue dye waste in Yogyakarta textile factory
Authors: Atmono Trimarji , Melati Asih , Purwadi Agus , Taxwim  , Sudjadi Usman
Published: April 2024

Thin films of NiOAg were grown onto glass substrates by radio frequency (RF) sputtering technique at 13.56 MHz RF with variation in oxygen pressure. The research was conducted on preparation and characterization of NiOAg thin films, applicated as a photocatalyst for the degradation of methylene blue. X-ray diffraction analysis showed stronger intensity (111) and (200) planes at peak 2θ of 37.66° and 43.23°. Energy dispersive x-ray analysis showed the following composition: Ni = 40.45%, Ag = 13.01%, and O = 46.53%. Based on UV–vis, it was found that the bandgap energy was 2.8, 3.1, and 3.2 eV for oxygen pressures of 0.05, 0.1, and 0.15 × 10−2 mbar, respectively. From the experiment on the degradation of methylene blue, which was taken from textile factory dye waste in Yogyakarta/Indonesia, the best value of degradation was obtained as 91.96%.
Determining effects of doping lithium nickel oxide with tungsten using Compton scattering
Authors: Kothalawala Veenavee Nipunika , Suzuki Kosuke , Li Xin , Barbiellini Bernardo , Nokelainen Johannes , Makkonen Ilja , Ferragut Rafael , Tynjälä Pekka , Laine Petteri , Välikangas Juho , Hu Tao , Lassi Ulla , Takano Kodai , Tsuji Naruki , Amada Yosuke , Sasikala Devi Assa Aravindh , Alatalo Matti , Sakurai Yoshiharu , Sakurai Hiroshi , Babar Mohammad , Vishwanathan Venkatasubramanian , Hafiz Hasnain , Bansil Arun
Published: April 2024

X-ray Compton scattering experiments along with parallel first-principles computations were carried out on LiNiO2 to understand the effects of W doping on this cathode material for Li-ion batteries. By employing high-energy x rays exceeding 100 keV, an insight is gained into the fate of the W valence electrons, which are adduced to undergo transfer to empty O 2p energy bands within the active oxide matrix of the cathode. The substitution of W for Ni is shown to increase the electronic conductivity and to enhance the total magnetization per Ni atom. Our study demonstrates that an analysis of line shapes of Compton scattered x rays in combination with theoretical modeling can provide a precise method for an atomic level understanding of the nature of the doping process.
Thermoelectric properties of lead-free anti-perovskites X3BN (B = Bi, Sb, X = Mg, Ca, Sr): A theoretical study based on first-principles calculations and machine learning interatomic potential
Authors: Hu Tao , Hu Yanxiao , Shang Wenqiu , Li Li , Feng Chunbao , Zhou Ping , Li Dengfeng
Published: April 2024

The search for non-toxic and low-cost perovskites with high thermoelectric performance is still a challenge despite low thermal conductivity. The thermoelectric properties of nitride anti-perovskites X3BN (B = Bi, Sb, X = Mg, Ca, Sr) with a cubic structure were investigated using density functional theory and machine learning interatomic potential. The low Debye temperature and thermal conductivity were obtained due to strong lattice anharmonicity, and the phonon vibration modes were also analyzed. The high band degeneracy and suitable bandgap lead to a large power factor. The maximum power factor is 7.54 mW/mk2 for Mg3BiN at 900 K. We obtained a maximum ZT of 1.49 for p-type Sr3BiN, and it is 1.22 for n-type doping at 900 K. The ZT for Mg3BiN is 1.18 and 1.19 for p-type and n-type doping, respectively. Our calculations reveal that these anti-perovskites are excellent materials for non-toxic and low-cost thermoelectric applications.
Modeling of brain efflux: Constraints of brain surfaces
Authors: Bork Peter A. R. , Hauglund Natalie L. , Mori Yuki , Møllgård Kjeld , Hjorth Poul G. , Nedergaard Maiken
Published: April 2024

Fluid efflux from the brain plays an important role in solute waste clearance. Current experimental approaches provide little spatial information, and data collection is limited due to short duration or low frequency of sampling. One approach shows tracer efflux to be independent of molecular size, indicating bulk flow, yet also decelerating like simple membrane diffusion. In an apparent contradiction to this report, other studies point to tracer efflux acceleration. We here develop a one-dimensional advection–diffusion model to gain insight into brain efflux principles. The model is characterized by nine physiological constants and three efflux parameters for which we quantify prior uncertainty. Using Bayes’ rule and the two efflux studies, we validate the model and calculate data-informed parameter distributions. The apparent contradictions in the efflux studies are resolved by brain surface boundaries being bottlenecks for efflux. To critically test the model, a custom MRI efflux assay measuring solute dispersion in tissue and release to cerebrospinal fluid was employed. The model passed the test with tissue bulk flow velocities in the range 60 to 190

μ

m/h. Dimensional analysis identified three principal determinants of efflux, highlighting brain surfaces as a restricting factor for metabolite solute clearance.
In-Situ Atomic-Scale Observation of Brownmillerite to Ruddlesden–Popper Phase Transition Tuned by Epitaxial Strain in Cobaltites
Authors: Lin 林 Ting 挺 , Gao 高 Ang 昂 , Tang 汤 Zhexin 哲歆 , Lin 林 Weiguang 炜光 , Sun 孙 Muhua 慕华 , Zhang 张 Qinghua 庆华 , Wang 王 Xuefeng 雪锋 , Guo 郭 Er-jia 尔佳 , Gu 谷 Lin 林
Published: April 2024

Phase transitions involving oxygen ion extraction within the framework of the crystallographic relevance have been widely exploited for sake of superconductivity, ferromagnetism, and ion conductivity in perovskite-related oxides. However, atomic-scale pathways of phase transitions and ion extraction threshold are inadequately understood. Here we investigate the atomic structure evolution of LaCoO3 films upon oxygen extraction and subsequent Co migration, focusing on the key role of epitaxial strain. The brownmillerite to Ruddlesden–Popper phase transitions are discovered to stabilize at distinct crystal orientations in compressive- and tensile-strained cobaltites, which could be attributed to in-plane and out-of-plane Ruddlesden–Popper stacking faults, respectively. A two-stage process from exterior to interior phase transition is evidenced in compressive-strained LaCoO2.5, while a single-step nucleation process leaving bottom layer unchanged in tensile-strained situation. Strain analyses reveal that the former process is initiated by an expansion in Co layer at boundary, whereas the latter one is associated with an edge dislocation combined with antiphase boundary. These findings provide a chemo-mechanical perspective on the structure regulation of perovskite oxides and enrich insights into strain-dependent phase diagram in epitaxial oxides films.
Experimental Investigations of Quasi-Coherent Micro-Instabilities in J-TEXT Ohmic Plasmas
Authors: Shi 石 Peng 鹏 , Zhuang 庄 G. 革 , Cheng 程 Zhifeng 芝峰 , Gao 高 Li 丽 , Zhou 周 Yinan 乙楠 , Liu 刘 Yong 永 , Luo 罗 J. T. 景庭 , Li 李 Jingchun 景春
Published: April 2024

Quasi-coherent micro-instabilities is one of the key topics of magnetic confinement fusion. This work focuses on the quasi-coherent spectra of ion temperature gradient (ITG) and trapped-electron-mode instabilities using newly developed far-forward collective scattering measurements within ohmic plasmas in the J-TEXT tokamak. The ITG mode is characterized by frequencies ranging from 30 to 100 kHz and wavenumbers (kθρ
s) less than 0.3. Beyond a critical plasma density threshold, the ITG mode undergoes a bifurcation, which is marked by a reduction in frequency and an enhancement in amplitude. Concurrently, enhancements in ion energy loss and degradation in confinement are observed. This ground-breaking discovery represents the first instance of direct experimental evidence that establishes a clear link between ITG instability and ion thermal transport.
Origin of the Disparity between the Stability of Transmutated Mix-Cation and Mix-Anion Compounds
Authors: Ye 野 Shi-Wei 仕伟 , Geng 耿 Song-Yuan 松源 , Liang 梁 Han-Pu 汉普 , Zhang 张 Xie 燮 , Wei 魏 Su-Huai 苏淮
Published: April 2024

Transmutation is an efficient approach for material design. For example, ternary compound CuGaSe2 in chalcopyrite structure is a promising material for novel optoelectronic and thermoelectric device applications. It can be considered as formed from the binary host compound ZnSe in zinc-blende structure by cation transmutation (i.e., replacing two Zn atoms by one Cu and one Ga). While cation-transmutated materials are common, anion-transmutated ternary materials are rare, for example, Zn2AsBr (i.e., replacing two Se atoms by one As and one Br) is not reported. The physical origin for this puzzling disparity is unclear. In this work, we employ first-principles calculations to address this issue, and find that the distinct differences in stability between cation-transmutated (mix-cation) and anion-transmutated (mix-anion) compounds originate from their different trends of ionic radii as functions of their ionic state, i.e., for cations, the radius decreases with the increasing ionic state, whereas for anions, the radius increases with the increasing absolute ionic state. Therefore, for mix-cation compounds, the strain energy and Coulomb energy can be simultaneously optimized to make these materials stable. In contrast, for mix-anion systems, minimization of Coulomb energy will increase the strain energy, thus the system becomes unstable or less stable. Thus, the trend of decreasing strain energy and Coulomb energy is consistent in mix-cation compounds, while it is opposite in mix-anion compounds. Furthermore, the study suggests that the stability strategy for mix-anion compounds can be controlled by the ratio of ionic radii r
3/r
1, with a smaller ratio indicating greater stability. Our work, thus, elucidates the intrinsic stability trend of transmutated materials and provides guidelines for the design of novel ternary materials for various device applications.
Construction of color-magnitude diagrams using real astronomical data for teaching at school
Authors: Fuentes-Morales I , Hernández C , Alarcón F , Benito I , Montecinos R
Published: April 2024

In this paper, with the aim of bridging the gap between cutting-edge research and the classroom, we present a situated learning proposal to integrate astronomical data and tools in the teaching of mathematics and physics. Our approach focuses on the construction of magnitude-color diagrams for two well-known star clusters, the Pleiades and 47 Tucanae, which are visible from the southern hemisphere, using virtual observatory-based applications Aladin and Topcat, using Simbad data specifically to separate data differences due to proper motion and/or reddening due to absorption by interstellar dust. To assess the feasibility of implementing these tools at school, we organized a workshop for science teachers that received a positive response. In addition, we also discuss the limitations and challenges that could hinder the effective application of these tools for educational purposes.
Towards a Standard Model with six fermion generations and a new breaking scale?
Authors: Palcu Adrian
Published: April 2024

We propose here an enhanced version of the Standard Model based on the same local gauge group SU(3)
c
⨂ SU(2)
L
⨂ U(1)
Y
that undergoes a spontaneous symmetry breaking up to SU(3)
c
⨂ U(1)
em
. We prove that it can naturally predict: (i) the electric and weak charges’ quantization, (ii) the muon anomalous magnetic moment discrepancy Δa

μ
, along with (iii) a realistic Higgs spectrum, (iv) a viable neutrino phenomenology, and (v) FCNCs suppression. This promising outcome—without spoiling any of the experimentally validated predictions of the Standard Model—occurs by simply assuming there are six non-universal fermion generations and two distinct scalar doublets. The latter ones develop different breaking scales, the old Standard Model scale v ≃ 246 GeV and a higher scale V —most likely in 1–100 TeV region, to be tested at LHC.
Recent progress on topological semimetal IrO2: electronic structures, synthesis, and transport properties
Authors: Zhang T X , Coughlin A L , Lu Chi-Ken , Heremans J J , Zhang S X
Published: April 2024

5d transition metal oxides, such as iridates, have attracted significant interest in condensed matter physics throughout the past decade owing to their fascinating physical properties that arise from intrinsically strong spin-orbit coupling (SOC) and its interplay with other interactions of comparable energy scales. Among the rich family of iridates, iridium dioxide (IrO2), a simple binary compound long known as a promising catalyst for water splitting, has recently been demonstrated to possess novel topological states and exotic transport properties. The strong SOC and the nonsymmorphic symmetry that IrO2 possesses introduce symmetry-protected Dirac nodal lines (DNLs) within its band structure as well as a large spin Hall effect in the transport. Here, we review recent advances pertaining to the study of this unique SOC oxide, with an emphasis on the understanding of the topological electronic structures, syntheses of high crystalline quality nanostructures, and experimental measurements of its fundamental transport properties. In particular, the theoretical origin of the presence of the fourfold degenerate DNLs in band structure and its implications in the angle-resolved photoemission spectroscopy measurement and in the spin Hall effect are discussed. We further introduce a variety of synthesis techniques to achieve IrO2 nanostructures, such as epitaxial thin films and single crystalline nanowires, with the goal of understanding the roles that each key parameter plays in the growth process. Finally, we review the electrical, spin, and thermal transport studies. The transport properties under variable temperatures and magnetic fields reveal themselves to be uniquely sensitive and modifiable by strain, dimensionality (bulk, thin film, nanowire), quantum confinement, film texture, and disorder. The sensitivity, stemming from the competing energy scales of SOC, disorder, and other interactions, enables the creation of a variety of intriguing quantum states of matter.
Age-based diagnostic reference levels and achievable doses for paediatric CT: a survey in Shanghai, China
Authors: Yang Fanqiaochu , Gao Linfeng
Published: April 2024

Computed tomography (CT) is extensively utilised in medical diagnostics due to its notable radiographic superiority. However, the cancer risk associated with CT examinations, particularly in children, is of significant concern. The assessment of cancer risk relies on the radiation dose to examinees. Diagnostic reference levels (DRLs) and achievable doses (ADs) were used to assess the level of radiation dose in CT examinations widely. Although the national DRLs of paediatric CT have been explored in China, few local DRLs at the city level have been assessed. To set up the local DRLs and ADs of paediatric CT, we investigated the radiation dose level for paediatric CT in Shanghai. In this survey, a total of 3061 paediatric CT examinations underwent in Shanghai in 2022 were selected by stratified sampling, and the dose levels in terms of volume CT dose index (CTDIvol) and the dose-length product (DLP) were analysed by 4 age groups. The DRLs and ADs were set at the 75th and 50th percentile of the distribution and compared with the previous studies at home and abroad. The survey results revealed that, for head scan, the DRLs of CTDIvol were from 25 to 46 mGy, and the levels of DLP were from 340 to 663 mGy·cm. For chest, the DRLs of CTDIvol were from 2.2 to 8.3 mGy, and the levels of DLP were from 42 to 223 mGy·cm. For abdomen, the DRLs of CTDIvol were from 6.3 to 16 mGy, and the levels of DLP were from 181 to 557 mGy·cm. The ADs were about 60% lower than their corresponding DRLs. The levels of radiation doses in children-based hospitals were higher than those in other medical institutions (P < 0.001). In conclusion, there was still potential for reducing radiation dose of paediatric CT, emphasising the urgent need for optimising paediatric CT dose in Shanghai.
Method for the P-wave arrival pickup of rock fracture acoustic emission signals under strong noise
Authors: Luo Junhua , Bespal’Ko Anatoly Alekseevich , Lu Di , Li Baocheng
Published: April 2024

This research aimed to investigate the accuracy of picking of P-wave arrival times in rock fracture acoustic emission signals. In order to simulate the mining scenario, Gaussian white noise and pulse noise were added to the data collected in the laboratory. Complete ensemble empirical mode decomposition with adaptive noise + Wavelet (CEEMDAN + Wavelet) was improved in this paper, where the Spearman rank correlation coefficient was adopted to effectively select intrinsic mode functions for denoising which retained the inherent characteristics of the rock fracture signal. The absolute amplitude and energy change rate of the envelope signal, calculated based on the Hilbert transform, were used as the input of the short term average/long term average (STA/LTA) normalization algorithm to pickup the P-wave arrival time. The reliability of this method was tested on 30 groups of recorded rock fracture laboratory data and 60 groups of added noise data. Taking the manual pickup results as the standard, the errors of CEEMDAN + Wavelet + STA/LTA + AIC (Akaike information criterion) method with the absolute amplitude of the signal as the input are all within 10 ms, and 86.67% of the results are within 5 ms. The method proposed in this paper effectively addressing the issue of false pickup caused by the sensitivity of AIC and traditional STA/LTA method for strong noise, and achieving relatively high accuracy and stability in processing low signal-to-noise ratio signals. This work contributes to monitor microscopic changes in rock bodies and is of great significance for the prediction and monitoring of geological disasters.
A first-principles study of HfB2 anisotropic surface stability and its oxygen adsorption behavior
Authors: Cheng Gong , Cao Shengzhu , Zhang ZhenZhen , Xiong Yuqing , Zhou Hui , He Yanchun , Zhang Kaifeng , Gao Hengjiao
Published: April 2024

In this work, the HfB2 anisotropic surface stability, and the adsorption behavior of oxygen molecule on the most likely exposed HfB2 surface were investigated based on density functional theory. The study found that the HfB2(0001) surface terminated by Hf (labeled as: Hf-(0001)) is more stable, and more likely interact with oxygen. By rotating the oxygen molecule orientation and changing the adsorption site, all possible high and low-symmetry adsorption configurations are considered. The results show that the low symmetry structure is unstable, and eventually turn into the high symmetry ones. For the highly symmetric structures, oxygen molecule tends to be adsorbed in parallel, and the dissociated oxygen molecule tends to be located at the bridge and hollow site of the Hf-(0001) surface, and there is no energy barrier to this process. Charge density difference and partial density of states proved that oxygen absorbed structures present similar electronic interaction characteristics, and oxygen adsorption process mainly affects the Hf atom at the outmost layer of the Hf-(0001) plane. Oxygen atoms bind to the Hf-(0001) surface mainly in the form of ionic bonds and covalent bonds, originating from the orbital hybridization of O-p and Hf-d. The oxidation of HfB2 starts from the interaction between oxygen and Hf.
Multi-branch myocardial infarction detection and localization framework based on multi-instance learning and domain knowledge
Authors: Li Xinyue , Huang Yangcheng , Ning Yixin , Wang Mingjie , Cai Wenjie
Published: April 2024

Objective. Myocardial infarction (MI) is a serious cardiovascular disease that can cause irreversible damage to the heart, making early identification and treatment crucial. However, automatic MI detection and localization from an electrocardiogram (ECG) remain challenging. In this study, we propose two models, MFB-SENET and MFB-DMIL, for MI detection and localization, respectively. Approach. The MFB-SENET model is designed to detect MI, while the MFB-DMIL model is designed to localize MI. The MI localization model employs a specialized attention mechanism to integrate multi-instance learning with domain knowledge. This approach incorporates handcrafted features and introduces a new loss function called lead-loss, to improve MI localization. Grad-CAM is employed to visualize the decision-making process. Main Results. The proposed method was evaluated on the PTB and PTB-XL databases. Under the inter-patient scheme, the accuracy of MI detection and localization on the PTB database reached 93.88% and 67.17%, respectively. The accuracy of MI detection and localization on the PTB-XL database were 94.89% and 85.83%, respectively. Significance. Our method achieved comparable or better performance than other state-of-the-art algorithms. The proposed method combined deep learning and medical domain knowledge, demonstrates effectiveness and reliability, holding promise as an efficient MI diagnostic tool to assist physicians in formulating accurate diagnoses.