bluuebunny/crossref_metadata_2025 huggingface dataset:
DESAFIOS ENFRENTADOS POR ESTUDANTES FORMADOS NO ENSINO MÉDIO REMOTO AO INGRESSAR NO ENSINO SUPERIOR NA UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA
Authors: Sinara de Jesus Lopes  , Mirela Figueiredo Santos Iriart
Published: June 2024

No ano de 2020, a necessidade de fechamento das escolas foi inquestionável por conta da pandemia mundial do covid-19. Na Bahia, a suspensão das aulas presenciais, que duraria inicialmente 30 dias, se prolongou até o segundo semestre de 2021. Assim como outros setores não essenciais, o campo educacional sofreu impactos com esse contexto de crise, consequentemente, afetando milhares de jovens estudantes do ensino médio em aspectos sociais, emocionais e em relação a suas aprendizagens.
Avaliação de metais em sedimento na Baía de Aratu - BA
Authors: Alexandre Mascarenhas Miranda  , Consuelo Lima Navarro de Andrade
Published: June 2024

A Baía de Aratu, com aproximadamente 20 km2, está localizada no interior da Baía de Todos os Santos (BTS) (BITTENCOURT et al., 1974) e tem grande importância para o Estado da Bahia, sendo um grande centro industrial e portuário, com diversos terminais de carga e descarga de mercadorias. Além disso, a baía é cercada por manguezais, dunas e restingas, formando um ecossistema importante para a preservação da fauna e flora da região.
ANÁLISE DE ILHAS EM REDES SEMÂNTICAS BASEADAS EM LIVROS DIDÁTICOS
Authors: Antonio Diego da Luz Silva  , Marcos Grilo Rosa
Published: June 2024

A Ciência das Redes é um campo interdisciplinar que investiga padrões nas relações em sistemas baseados em grafos. O estudo de ilhas em redes possibilita a identificação das relações mais relevantes nestes sistemas baseados em grafos a partir da observação das arestas com maior peso. Para a compreensão destas ideias, faz-se necessário apresentar a seguinte definição: um grafo G=(V;A) é formado por um conjunto V de elementos denominados de vértices e por um conjunto A de pares de elementos de V denominados de arestas. Graficamente, pode-se representar vértices por pontos e arestas por linhas.
CONSTRUÇÃO E ANÁLISE DE TAREFAS MATEMÁTICAS INTERDISCIPLINARES POR MEIO DE DA ORQUESTRAÇÃO INSTRUMENTAL DE DIFERENTES INSTRUMENTOS TECNOLÓGICOS PARA O ENSINO DE MATEMÁTICA
Authors: Caio Silva Brito dos Santos  , Eliane Santana de Souza Oliveira
Published: June 2024

O avanço das tecnologias digitais no mundo contemporâneo tem sido capaz de trazer o conhecimento do mundo todo e de toda a história para a ponta dos dedos de seus usuários em segundos. E as tecnologias digitais não se limitam a serem meros arautos do conhecimento.
MAPEAMENTO DA SUSCETIBILIDADE A MOVIMENTO DE MASSA NO VALE DO JIQUIRIÇÁ - BA
Authors: Da Silva Ericka Medeiros , Washington de Jesus Sant'Anna da Franca Rocha
Published: June 2024

Os movimentos de massa são fenômenos naturais associados ao deslocamento rápido de solo e rocha de uma encosta onde o centro de gravidade desses materiais se deslocam para fora e para baixo (CEPED, 2013), decorrente de um conjunto de fatores que condicionam esses processos, como o clima, o substrato geológico, relevo, águas superficiais e subsuperficiais, vegetação e uso e ocupação da terra (Vedovello; Macedo, 2007).
INSTRUMENTALIZAÇÃO E EXPERIMENTAÇÃO DE UM PERCURSO DE ESTUDO E PESQUISAS-PEP INTERDISCIPLINAR POR MEDIAÇÃO TECNOLÓGICA NA FORMAÇÃO INICIAL E CONTINUADA DE PROFESSORES DE MATEMÁTICA
Authors: Flavia dos Santos Ferreira  , Eliane Santana de Souza Oliveira
Published: June 2024

Este trabalho tem como objetivo apresentar a instrumentalização e a experimentação de um Percurso de Estudo e Pesquisa-PEP interdisciplinar por mediação tecnológica na formação inicial e continuada de professores de matemática.
CAPACIDADE TAMPÃO SALIVAR EM PACIENTES SOB TRATAMENTO DE CÂNCER ORAL
Authors: Eduardo Falcão de Assis Alves Paulo , Ynara Bosco de Oliveira Lima Arsati
Published: June 2024

O câncer de cabeça e pescoço representa um dos tipos mais comuns de câncer, com uma incidência de superior a meio milhão de casos diagnosticados anualmente. O carcinoma escamocelular de boca, laringe e faringe representa cerca de 90% dos casos (ALFOUZAN, 2021). A excisão cirúrgica, radioterapia e quimioterapia, são os procedimentos mais comuns para seu tratamento, que podem ser utilizados tanto isoladamente quanto associados (HONG et al., 2010).
RELAÇÕES ENTRE RACISMO E ADOECIMENTO MENTAL: UM ESTUDO A PARTIR DAS CONTRIBUIÇÕES DE FRANTZ FANON E NEUSA SANTOS SOUZA
Authors: Lísia Maria Gama Lima  , Diego Arthur Lima Pinheiro
Published: June 2024

Essa pesquisa de Iniciação Científica buscou investigar as possíveis relações entre racismo e saúde mental nas obras de pensadores e pensadoras negros da contemporaneidade com destaque nos trabalhos de Frantz Fanon e Neusa Santos Souza.
Ressonância quântica e clássica: explorando simulações no GeoGebra mediante a função de Green e a equação de Dyson
Authors: Dias Andrade Davy , Franz Peter Alves Farias
Published: June 2024

Na Física Clássica a ressonância e um fenômeno caracterizado pelo aumento da amplitude de oscilação de um sistema vibratório devido uma fonte externa periódica de energia, cujo a frequência da fonte assemelhe-se a frequência natural do sistema.
UMA VISÃO HORA A HORA DA AUTOCORRELAÇÃO EM DADOS METEOROLÓGICOS NA BAHIA
Authors: Natalia Oliveira Santos  , Gilney Figueira Zebende
Published: June 2024

Ferraro & Hasenack (2000) destacam a relevância dos fatores climáticos no ecossistema, afirmando que eles influenciam o ecossistema e têm impactos abrangentes, incluindo na vegetação, distribuição da vida selvagem e bem-estar da população. Isso ressalta a importância da pesquisa das variáveis climáticas.
CE-DOHS/UEFS: EDIÇÃO MODERNIZADA DE AMOSTRAS DE FALA DE BARRA DOS NEGROS/BANANAL
Authors: Ana Gabriela Oliveira Martins Araujo  , Mariana Fagundes de Oliveira Lacerda
Published: June 2024

O projeto A Língua Portuguesa no Semiárido Baiano – do Núcleo de Estudos de Língua Portuguesa (NELP), , da Universidade Estadual de Feira de Santana (UEFS) –, financiado pela Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB), começou a ser executado em 1998, tendo como objetivo geral contribuir para o estudo da sócio-história da língua portuguesa, na sua variedade falada, tendo as seguintes frentes de trabalho: (i) Formação de banco de dados com amostras de fala de comunidades rurais e urbanas do semiárido baiano; (ii) Realização de estudos sócio-históricos sobre a formação da língua portuguesa nas localidades pesquisadas; (iii) Realização de análises linguísticas, à luz de diferentes teorias linguísticas; (iv) Elaboração de materiais didáticos para serem utilizados nas escolas da região.
Moda e sexualidade em revistas femininas do século XX: cotejando discursos
Authors: Andressa Vieira Souza  , Palmira Virginia Bahia Heine Alvarez
Published: June 2024

As questões relacionadas à sexualidade e à moda estiveram ligadas socialmente às diferenciações de gênero por muito tempo. Em relação à sexualidade, por exemplo, ressalta-se que no que diz respeito à mulher, este elemento foi sempre obscuro, sendo silenciado, controlado e negado.
A VARIAÇÃO DO USO DO PRONOME CLÍTICO SE EM SENTENÇAS REFLEXIVAS DO PORTUGUÊS FALADO EM LUANDA
Authors: Élen Correia Novais  , Silvana Silva de Farias Araujo
Published: June 2024

Os processos sócio-históricos que acompanham a formação da língua vernácula de uma nação evidenciam que o contato linguístico contribui para a formação de novas variedades linguísticas. Das variedades de português existentes, e devido às trocas comerciais que existem entre o Brasil e a África, infere-se que as línguas de países africanos, principalmente as de origem Banto e Iorubá, contribuíram significativamente para a formação do Português Brasileiro (PB) (CASTRO 2002, 2005; PETTER, 2008).
Field Notes
Authors: Braid-Fernandez Alison
Published: June 2024

Abstract: This short story follows a woman’s trip to her mothers’ home on a train ride. An accident occurs whilst on the train that alters the narrator’s mindset and forces her to reflect on her own life. The narrator also interacts with various people while on and off the train that confuse and enlighten her beliefs. This story examines the ideas of communication, reactions and responses to tragedy, and the power of storytelling.
Of Soles and Souls
Authors: Stallybrass Peter
Published: June 2024

Abstract: This essay examines the interpretation and metaphors of shoes and souls throughout several literary works. Literary theory, including Freud, is used to explore and examine the multiple connections of the shoes. Within the analysis, boots, shoes, and feet are in themselves able to tell their own stories. They can show the status of individuals. Also, they can explain their livelihoods and situations of their wearers . When looking at a pair of shoes, depending on the lens used, various interpretations can arise as examined in this essay.
Man Crossing an Ice Field
Authors: Louis Laura Glen
Published: June 2024

Abstract: This essays explores the loss of a family member to a degenerative cognitive disease. The husband of the narrator, a once brilliant scientist, progressively begins to lose his memory. After several months, the husband has begun to lose his personality and is quickly angered. The narrator and their son must navigate this new, unknown terrain of who their loved one is and who they will continuously become. The narrator explains her own health problems that have arisen since her husband has developed Alzheimer’s. They help lead her to the decision to put her husband in a home to get the support she struggles to provide for him. The journey of the wife losing her marriage and the life that she once knew while trying to stay strong for her husband who is losing himself too.
Optimization of acquisition patterns for establishing inter CubeSat optical communications
Authors: Rüddenklau René , Schitter Georg
Published: June 2024

As commercially available CubeSats with up to six standardized units cannot achieve the precision required for an instantaneous establishment of a low-divergence optical inter-satellite link, search patterns are used to scan the remaining field of uncertainty. This analysis optimizes the simultaneously executed search pattern combinations of the two laser communication terminals involved. Based on a Monte Carlo simulation, the perturbations on these links are investigated, and the corresponding key performance parameters such as mean acquisition time and success rate are calculated. The results are penalized by the hardware specifications, including actuator and sensor bandwidths, given by their design. Residual attitude error components imply a significant influence on the acquisition process and are therefore presented within this work. The pattern pairs are fed through an automated optimization algorithm to tune and analyze them. In this particular scenario of two CubeISL models, the mean duration for a first detected acquisition hit is within a pattern period of 3.2 s for the best performing pairs spiral-rose and lissajous-rose. Assuming an uncertainty field of ±0.2deg due to limited attitude knowledge, success rates between 82.3% and 99.9% are achieved.
Versatile platform for electrically reconfigurable THz devices based on silicon Schottky-metasurfaces
Authors: Ahadi Saeedeh , Neshat Mohammad , Moravvej-Farshi Mohammad Kazem
Published: June 2024

We propose a versatile platform to design tunable metasurface devices based on Au/n-Si Schottky diodes embedded in a split-ring resonator (SRR) devised on a Si-on-insulator (SOI) wafer. The horizontally formed diodes are connected in the SRR radial direction, reducing the overall junction capacitance of the metasurface array compared to its counterparts with vertically formed Schottky junctions. This reduction in the junction capacitance has an essential role in the switching speed of the metasurface between the On and Off states. By carefully varying the externally applied bias voltage to the Schottky diodes, one can manipulate the incident THz signal at the metasurface resonance frequencies by converting its resonance mode by switching states. We use the forenamed platform to design three fundamental THz devices: a modulator, a polarization switch, and a polarizing beam splitter. A reverse bias of V
R
=5V excites two LC resonances at 0.3 THz and 0.89 THz in the modulator, which fade away by switching the gate voltage to V
F
=0.49V, exciting a dipole resonance in the metasurface at 0.75 THz. The numerical results show that this THz modulator enjoys modulation depths of ≥92% at the LC resonances and a phase modulation of ∼1.16rad at 0.86 THz. An identical electric bias change of the Schottky diodes in the polarization switch alters the resonators from anisotropic to isotropic, changing the output wave polarization from circular with nearly 99% of the circular polarization percentage to linear or quasi-linear at four frequencies simultaneously. Additionally, the proposed THz polarization splitter can deflect the cross-polarized transmitted component from the normally outgoing co-polarized one with an angle of 70° at 0.56 THz. The splitting ratio is switched from 1:1 in reverse bias to 14:1 in forward bias by changing the bias to forward bias. We expect that the proposed designs in the THz frequency domain, benefiting from the several hundred GHz switching speed of the Schottky diodes array, will be beneficial in applications such as analysis of the complex organic structures or polarization modulation and polarization-dependent multiplexing/demultiplexing in wireless communication systems.
Floquet analysis perspective of driven light–matter interaction models
Authors: Larson Jonas
Published: June 2024

In this paper, we analyze the harmonically driven Jaynes–Cummings and Lipkin–Meshkov–Glick models using both numerical integration of time-dependent Hamiltonians and Floquet theory. For a separation of time scales between the drive and intrinsic Rabi oscillations in the former model, the driving results in an effective periodic reversal of time. The corresponding Floquet Hamiltonian is a Wannier–Stark model, which can be analytically solved. Despite the chaotic nature of the driven Lipkin–Meshkov–Glick model, moderate system sizes can display qualitatively different behaviors under varying system parameters. Ergodicity arises in systems that are neither adiabatic nor diabatic, owing to repeated multi-level Landau–Zener transitions. Chaotic behavior, observed in slow driving, manifests as random jumps in the magnetization, suggesting potential utility as a random number generator. Furthermore, we discuss both models in terms of a Floquet Fock state lattice.
Light induced self-assembly of one-dimensional PT-symmetric optical system exhibiting pulling force
Authors: Liu Song , Cao Guangtao , Cui Liyong
Published: June 2024

Light induced self-assembly’s non-contact and non-invasive nature, along with its versatility and dynamic assembly capabilities, make it particularly well-suited for the self-organization of particles. Previous self-assembly configurations are either in a static equilibrium state or in a dynamic equilibrium state driven by a pushing force. In this study, we introduce a one-dimensional parity-time symmetric (PT-symmetric) multilayer optical system consisting of balanced gain and loss, enabling the generation of a total pulling force on the structure. By conducting molecular dynamics simulations, we achieve the self-organized structure exhibiting pulling force. Furthermore, by reversing the direction of the incident light, we realized pushing force induced binding. The stability of the bound structure is also analyzed using linear stability analysis. Additionally, the light induced self-assembly exhibiting pulling and pushing force is achieved in the one-dimensional multilayer system with unbalanced gain and loss. This work provides an additional degree of freedom in the self-organization of particles.
Measurements of cesium PJ-series quantum defect with the microwave spectroscopy
Authors: Song Rong , Bai Jingxu , Li Zhenhua , Jiao Yuechun , Zhao Jianming , Jia Suotang
Published: June 2024

High-precision microwave spectroscopy has been used to measure the transition frequency of nS1/2 → nPJ (n is the principle quantum number) and further the quantum defect of nPJ states in a standard cesium magneto-optical trap. A microwave field with 30-μs duration coupling the nS1/2 → nP1/2,3/2 transition yields a narrow linewidth microwave spectroscopy with the linewidth approaching the Fourier limit. After carefully compensating the stray electric and magnetic field and using the diluted atomic gas, we extract improved quantum defects of nPJ state, δ0(nP1/2) = 3.59159091(19), δ2(nP1/2) = 0.36092(35) and δ0(nP3/2) = 3.55907153(25), δ2(nP3/2) = 0.37344(47).
High-precision passive stabilization of a dissipative soliton resonance laser repetition rate based on optical pulse injection
Authors: Krzempek Karol
Published: June 2024

I present what is believed to be the first demonstration of using the
cross-phase modulation (XPM) effect to achieve high-precision,
all-optical synchronization and stabilization of the pulse repetition
rate of a dissipative soliton resonance (DSR) mode-locked (ML) fiber
laser working in the 1.06 µm wavelength range.
Nanosecond 1.55 µm Master oscillator pulses were
injected into the Slave cavity of the DSR laser to induce the XPM
effect and subsequently synchronize both repetition rates. When
referencing the Master laser to a rubidium frequency standard, the
fractional instability of the DSR ML laser pulse repetition rate
reached 1.26 × 10−12 for
1000 s integration time. The locking range and stability of the
XPM synchronization are experimentally verified under varying
conditions and discussed in the paper.
Desynchronization of temporal solitons in Kerr cavities with pulsed injection
Authors: Dolinina D. A. , Huyet G. , Turaev D. , Vladimirov A. G.
Published: June 2024

A numerical and analytical study was conducted to investigate the bifurcation mechanisms that cause desynchronization between the soliton repetition frequency and the frequency of external pulsed injection in a Kerr cavity described by the Lugiato–Lefever equation (LLE). The results suggest that desynchronization typically occurs through an Andronov–Hopf (AH) bifurcation. Additionally, a simple and intuitive criterion for this bifurcation to occur is proposed.
Observation of coupling interaction between surface plasmons and Tamm plasmons
Authors: Zhao Jianxu , Lu Hua , Shi Shouhao , Wang Chunyu , Li Dikun , Zhao Jianlin
Published: June 2024

The optical effect analogous to electromagnetically induced transparency (EIT) in atomic systems has attracted broad attention in the field of photonics due to its promising applications in optical storage and integrated devices. Herein, we firstly report the experimental observation of the EIT-like effect generated from the coupling between surface plasmons (SPs) and Tamm plasmons (TPs) in a hybrid multilayer system at the near-infrared band. This multilayer system is composed of a nanofabricated silver grating on a silver/Bragg mirror with a SiO2 spacer. The experimental results show that a narrow reflection peak can appear in the wide reflection spectral dip due to the coupling between the SPs in the silver grating and TPs in the silver/Bragg mirror, which agree well with the finite-difference time-domain (FDTD) simulations. It is also found that the dip position of the EIT-like spectrum presents a redshift with the increase of the silver grating width. These results will provide a new way, to the best of our knowledge, for the generation of the EIT-like effect and light spectral manipulation in multilayer structures.
Temperature dependence of THz generation efficiency, THz refractive index, and THz absorption in lithium-niobate around 275 GHz
Authors: Demirbas Umit , Rentschler Christian , Zhang Zhelin , Pergament Mikhail , Matlis Nicholas H. , Kärtner Franz X.
Published: June 2024

In this study, we demonstrate the capabilities of the pulse train excitation approach in determining key material properties of nonlinear crystals, such as refractive index, thermo-optic coefficient, and absorption. The method provides reliable results even at relatively low THz frequencies, where other characterization methods, such as THz time-domain spectroscopy, have difficulties. To illustrate the capabilities of our approach, we used pulse trains with 800-fs long pulses and adjustable time delay to investigate the material properties of periodically poled lithium niobate (PPLN) crystal with a poling period of 400 µm. Via scanning the incident pulse-train frequency, we measured the frequency response of the crystal at different temperatures (78-350 K), which enabled us to determine the temperature dependence of the refractive index and thermo-optic coefficient of the PPLN crystal around 275 GHz with very high precision. We further studied the variation of THz generation efficiency with temperature in detail to understand the temperature dependence of THz absorption in PPLN material. The technique employed is quite general and could be applied to both other frequency ranges and nonlinear crystals.
Tuberculin skin test surveys and the Annual Risk of Tuberculous Infection in school children in Northern KwaZulu-Natal
Authors: Yates Tom A. , Cebekhulu Siphiwe , Mthethwa Mumsy , Fourie P. Bernard , Newell Marie-Louise , Abubakar Ibrahim , Tanser Frank
Published: June 2024

Tuberculin skin test surveys in primary school children can be used to quantify Mycobacterium tuberculosis transmission at community level. KwaZulu-Natal province, South Africa, is home to 11.5 million people and suffers a burden of tuberculosis disease that is among the highest in the world. The last tuberculin survey in the province was undertaken in 1979. We performed a tuberculin skin test survey nested within a demographic and health household surveillance programme in Northern KwaZulu-Natal. We enrolled children aged between six and eight years of age attending primary schools in this community. Mixture analysis was used to determine tuberculin skin test thresholds and the Annual Risk of Tuberculous Infection derived from age at testing and infection prevalence. The Community Infection Ratio, a measure of the relative importance of within-household and community transmission, was calculated from data on tuberculin positivity disaggregated by household tuberculosis contact. Between June and December 2013, we obtained tuberculin skin test results on 1240 children. Mixture analysis proved unstable, suggesting two potential thresholds for test positivity. Using a threshold of ≥10mm or treating all non zero reactions as positive yielded estimates of the Annual Risk of Tuberculous Infection of 1.7% (1.4–2.1%) or 2.4% (2.0–3.0%). Using the same thresholds and including children reported to be receiving TB treatment as cases, resulted in estimates of 2.0% (1.6–2.5%) or 2.7% (2.2–3.3%). The Community Infection Ratio was 0.58 (0.33–1.01). The force of infection in this community is lower than that observed in Western Cape province, South Africa, but higher than that observed in community settings in most other parts of the world. Children in this community are commonly infected with Mycobacterium tuberculosis outside the home. Interventions to interrupt transmission are urgently needed.
Factors associated with under-five mortality in Rwanda: An analysis of the Rwanda Demographic and Health Survey 2020
Authors: Mkama Mgole Eliud , Koroma Mark Momoh , Cheng Xiaofen , Zhang Jindan , Chen Duo , Kong Lushi , Li Bei
Published: June 2024

Despite global and Rwandan progress in reducing under-five mortality, the risk of children dying before their fifth birthday persists, necessitating intensified research on determinants. Thus, this study analyzed the birth history data to shed light on the underlying causes of under-five mortality in Rwanda. The study is a secondary analysis of data sourced from the 2020 Rwanda Demographic and Health Survey (RDHS) cross-sectional design. Using SPSS, the data was cleaned, recoded, and weighted, with descriptive and inferential statistics applied. The dependent variable was the child’s living status, while independent variables included socio-demographic, media exposure status of mothers, child, and environmental factors. A total of 10267 under-five children of all interviewed mothers were included in the final analysis, of which 12.3% (1260) died. Maternal age (25–34 years: AOR = 1.514, 95% CI = 1.130–2.029, p = 0.005; 45+: AOR = 13.226, 95% CI = 9.253–18.905, p<0.001), occupational status (agricultural workers and other services), and three or more births within five years (AOR = 1.895, 95% CI = 1.433–2.508, p<0.001) significantly increase the risk of under-five mortality. Conversely, maternal education (primary: AOR = 0.821, p = 0.023; secondary: AOR = 0.533, p<0.001; higher: AOR = 0.365, p = 0.010) and higher wealth indexes (middle: AOR = 0.743, p = 0.001; rich: AOR = 0.612, p<0.001), as well as current breastfeeding (AOR = 0.524, 95% CI = 0.455–0.603, p-value <0.001), are associated with lower under-five mortality. Child sex significantly impacts under-five mortality (AOR = 0.873, 95% CI = 0.770–0.991, p = 0.035), favoring females over males. Conversely, multiple birth type children face higher under-five mortality (AOR = 3.541, 95% CI = 2.727–4.599, p<0.001) compared to singletons. Children in the northern (AOR = 1.478, 95% CI = 1.086–2.011, p = 0.013) and eastern (AOR = 1.470, 95% CI = 1.097–1.971, p = 0.010) regions are more susceptible to mortality compared to those in the central (Kigali) region. Additionally, under-five mortality is higher when using water from tanks and other sources (AOR = 2.240, 95% CI = 1.471–3.411, p<0.001) than piped water. This study identifies crucial factors linked to under-five mortality, underscoring the importance of prioritizing them in interventions to enhance Rwandan under-five survival rates.
Factors associated with problematic internet use among University of Gondar undergraduate students, Northwest Ethiopia: Structural equation modeling
Authors: Tilahun Werkneh Melkie , Tadesse Asefa Adimasu , Wolde Haileab Fekadu , Gebreegziabher Zenebe Abebe , Abebaw Wondwosen Abey , Simegn Mulat Belay , Abay Lamrot Yohannes , Tesfie Tigabu Kidie
Published: June 2024

Background

For young adults and adolescents, excessive internet use has become a serious public health concern due to its negative impact on their health. It has been associated with detrimental effects on both physical and mental health. Negative academic outcomes were observed in the students, including missing classes, lower grades, and academic dismissal. Therefore, the purpose of the current study was to identify factors associated with PIU among undergraduate students at the University of Gondar.

Method

A cross-sectional study was conducted at the University of Gondar among 1514 undergraduate students from June 1–20, 2022. The study participants were selected using a stratified simple random selection procedure. Using structural equation modeling, the degree of relationship was ascertained. A p-value of less than 0.05 and an adjusted regression coefficient with a 95% confidence interval (CI) were used to interpret the data.

Results

In our study, being from non-health departments [β = 0.11, 95% CI: 0.037, 0.181], current alcohol use [β = 0.12, 95% CI: 0.061, 0.187], depressive symptoms [β = 0.23, 95% CI: 0.175, 0.291], insomnia symptoms [β = 0.12, 95% CI: 0.060, 0.196], and ADHD symptoms [β = 0.11, 95% CI: 0.049, 0.166] had a significant positive effect on PIU, while having a history of head injury had a significant negative effect [β = -0.12, 95% CI: -0.226, -0.021] on PIU.

Conclusion and recommendation

Factors such as current alcohol use, non-health department type, depressive symptoms, insomnia, and ADHD symptoms were positively associated with PIU. However, a history of head injuries was negatively associated with PIU. Therefore, strategies aimed at the early identification of PIU may lead to an improvement in the psychosocial health of university students.
A high-accuracy lightweight network model for X-ray image diagnosis: A case study of COVID detection
Authors: Wang Shujuan , Ren Jialin , Guo Xiaoli
Published: June 2024

The Coronavirus Disease 2019(COVID-19) has caused widespread and significant harm globally. In order to address the urgent demand for a rapid and reliable diagnostic approach to mitigate transmission, the application of deep learning stands as a viable solution. The impracticality of many existing models is attributed to excessively large parameters, significantly limiting their utility. Additionally, the classification accuracy of the model with few parameters falls short of desirable levels. Motivated by this observation, the present study employs the lightweight network MobileNetV3 as the underlying architecture. This paper incorporates the dense block to capture intricate spatial information in images, as well as the transition layer designed to reduce the size and channel number of the feature map. Furthermore, this paper employs label smoothing loss to address the inter-class similarity effects and uses class weighting to tackle the problem of data imbalance. Additionally, this study applies the pruning technique to eliminate unnecessary structures and further reduce the number of parameters. As a result, this improved model achieves an impressive 98.71% accuracy on an openly accessible database, while utilizing only 5.94 million parameters. Compared to the previous method, this maximum improvement reaches 5.41%. Moreover, this research successfully reduces the parameter count by up to 24 times, showcasing the efficacy of our approach. This demonstrates the significant benefits in regions with limited availability of medical resources.
Finnish and Brazilian-Portuguese listeners’ evaluation of voice characteristics in Brazilian-Portuguese speaking actresses and non-actresses
Authors: Nilsson Tuuli , Laukkanen Anne-Maria , Syrjä Tiina , Master Suely
Published: June 2024

Auditory-perceptual evaluation is an important tool in voice training and voice therapy. International comparisons have been made for clinical evaluation tools such as GRBAS. Similar comparisons have not been made in the field of voice training. This study compares Finnish and Brazilian-Portuguese listeners’ evaluation of voice characteristics in Brazilian-Portuguese speaking actresses and non-actresses. Thirty experienced actresses and 30 non-actresses, all native speakers of Brazilian-Portuguese, were recorded for a 200-word reading task in habitual conversational loudness. Six perceptual voice characteristics were rated, including overall voice quality, type of voice production (from breathy to strained), sonority, suitability of average pitch for the speaker, pitch range and nasality. The inter-rater and intra-rater reliabilities were good or moderate in both Brazilian and Finnish raters, except for nasality. Finnish and Brazilian raters’ evaluations correlated strongly in voice quality, suitability of pitch and range (rho = 0.76, 0.62 and 0.82, respectively, p = 0.000). Moderate correlation was found for voice production (rho = 0.51, p = 0.000) and sonority (rho = 0.59, p = 0.000). Evaluations of nasality did not correlate. Small but significant differences were obtained in the mean evaluations, for example, Finns rated the pitch range higher (Bra =4.92 vs. Fin = 5.56, T-test, p < 0.001). Both groups evaluated actresses’ voices more positively. The results seem to suggest that voice experts share some international standards in voice quality evaluations, although ratings of some aspects may differ. This finding is in line with the cross-cultural comparisons of the evaluation of dysphonic voices.
What do you mean? Developing a ‘model of the aesthetic dialogue’ in collaborative music making
Authors: Sørbø Eirik , Røshol Andreas Waaler
Published: June 2024

This article explores a teaching method wherein undergraduate music performance students were given the task of making music in four different modes: (1) Nashville mode, (2) DAW mode, (3) track-for-topline mode and (4) topline-for-track mode. Thematic analysis of qualitative interviews highlights four domains influencing quality and efficiency of negotiation of musical ideas: (1) what the environment affords, (2) students’ ability to show or explain, (3) students’ taste and preferences and (4) students’ comfort sharing opinions. Based on these findings, we develop a model of aesthetic dialogue, understood as negotiation of musical ideas within a group. We argue that aesthetic dialogue is dynamic and constantly negotiated and that the model provides a framework suitable to address a range of issues relevant to students wanting to progress as co-writers. This model is proposed as a starting point for addressing collaborative music making and dialogues from student, teacher and curriculum perspectives.
Recursos lingüísticos para la expresión de la intersubjetividad en los textos escolares de historia chilenos
Authors: Franzani Paola , Román Horacio , Matus Evelyn
Published: June 2024

Este artículo examina los recursos lingüísticos utilizados para expresar la intersubjetividad en los textos escolares de historia de enseñanza secundaria chilenos. Desde una perspectiva social e ideológica del discurso, se busca identificar los posicionamientos que se integran como testimonios históricos del pasado mapuche, así como los recursos lingüísticos que son utilizados para incorporar dichas miradas en el discurso pedagógico de la historia. Los resultados dan cuenta del uso de variados recursos lingüísticos que promueven la comprensión de la historia como un campo de estudio de carácter interpretativo. El Estado chileno, historiadores y antropólogos del pueblo mapuche; una historiadora no mapuche y miembro de la Academia Militar; así como un miembro de la Guardia Nacional de Chile constituyen la principal evidencia histórica para que los estudiantes entiendan uno de los periodos clave para el devenir del pueblo mapuche. A nivel lexicogramatical, estos testimonios se alinean con distintos grados de transparencia a las visiones en juego por medio de recursos como nominalizaciones de Procesos mentales, proyecciones verbales y mentales, construcciones pasivas, complementos circunstanciales, entre otros.
Investigación - Categoría A
Authors: VV. AA.
Published: June 2024

Premio ARQUISUR Investigación - Categoría A
Los trabajos presentados al Premio ARQUISUR Investigación son aquellos que derivan de procesos de producción del conocimiento, elaborados por docentes y/o estudiantes de las Facultades o Escuelas de Arquitectura de ARQUISUR, como parte de su actividad académica, independientemente de su fuente de financiación, si existiera.
La Categoría A contiene trabajos producidos por investigadores en formación, realizados en forma individual o en grupo, por alumnos de grado, docentes o egresados con no más de 5 años de recibidos al momento de presentar el trabajo a este Premio ARQUISUR.
Investigación - Categoría B
Authors: VV. AA.
Published: June 2024

Premio ARQUISUR Investigación - Categoría B
Los trabajos presentados al Premio ARQUISUR Investigación son aquellos que derivan de procesos de producción del conocimiento, elaborados por docentes y/o estudiantes de las Facultades o Escuelas de Arquitectura de ARQUISUR, como parte de su actividad académica, independientemente de su fuente de financiación, si existiera.
La Categoría B contiene trabajos producidos en forma individual o grupal por investigadores formados con directores reconocidos en sistemas formales. En esta categoría se podrán aceptar tesis de posgrado que no hayan sido publicadas.
DESIGN SOLUTIONS FOR REHABILITATION OF A WATER TREATMENT PLANT
Authors: Meghea Irina , Lesnic Mihai , Manea-Saghin Ana-Maria
Published: June 2024

Pharmaceutical pollutants (PhP) represent a serious problem for surface, underground and even drinkable waters. PhP removal is of crucial importance since pharmaceutics production and consumption have been increasing during the last decades. The rehabilitation of the existent treatment plants is a viable solution to clean the water also by removing this type of contaminants which cause hazardous effects on human health and on environment. In this paper, the design of such improved plant with indications for technological objects including components, calculation details and examples are presented. The schemes for the improvement of the existent plants are explained, the introduction of corresponding membranes is sustained by appropriate computations and all the necessary elements for such an action are described in accordance with a lot of specialty studies. A flow balance scheme to calculate the water flow at the entrance in the installation of advanced treatment with filter membranes is also proposed.
FLOATING DOCK ANALYSIS SUBJECT TO DYNAMIC WAVE LOADS USING COMPUTATIONAL FLUID DYNAMICS
Authors: Luo Honggao , Li Xiongkai , Ni Zihao , Ji Jun , Wang Qian
Published: June 2024

Floating dock systems are widely used in marine and waterfront facilities. Environmental loading and movements applied on these systems can be challenging to predict due to the complex interaction between structures and fluids under dynamic wave loads. Design of floating dock systems requires analysis of wave induced forces, relative movements of the dock, effects of connections, and subsequent loads and deflections in piles or mooring line anchors. Supporting structures such as piles or mooring lines can have significant impacts on load distribution within a floating dock system and shall be analyzed carefully during design. Recent advances in computer hardware and multi-physics computational fluid dynamics (CFD) technology have permitted transient dynamic wave analysis of entire floating dock system, to explicitly consider fluid-structure interaction in the analysis and design of floating dock systems. In this study, a CFD technology is applied to investigate the dynamic system characteristics of a floating dock system supported by both piles and mooring lines. CFD analysis is based on software package FLOW-3D® Hydro. Floating dock, piles, and mooring lines are modeled, and analysis results are presented. It is shown to be useful for analyzing floating docks which are typically too complex to accurately evaluate using empirical methods.
PACKING ORDER THEORY FOR ULTRA-HIGH PERFORMANCE CONCRETE MIX DESIGN: A CRITICAL REVIEW
Authors: Akhnoukh Amin Kamal , Diab Mohamed
Published: June 2024

Ultra-high-performance concrete (UHPC), also known as reactive powder concrete (RPC), is a relatively new construction material with improved mechanical properties and long-term performance. UHPC is manufactured using a specific matrix of well-graded granular particles including Portland cement, supplementary cementitious materials (SCMs), and fine aggregates. The cementitious material matrix is hydrated using a relatively low water-to-powder ratio and high range water reducing chemicals (HRWR). The hydrated mix is augmented with high grade random steel fibers. UHPC superior mechanical performance and durability is attributed to the high packing order of the granular materials within the UHPC mix resulting in lower voids, reduced permeability, and high density. Accordingly, UHPC design depends on proportioning the mix granular material to produce minimal void content (i.e., produce highest packing order). This research paper discusses UHPC mix constituents, proprietary UHPC mix designs, sizes of granular particles, and resulting packing order. Moreover, a critical review of the particles packing order approach used in UHPC mix design is presented. Possible improvement of UHPC mix design may result in economic mixes, enhanced mechanical properties, and increased durability.
IMPLEMENTING VIRTUAL REALITY TO FOSTER CONSTRUCTION DEFECTS CHECKING AND REPORTING
Authors: Wong Peter SP , Nicholls Will
Published: June 2024

The scarce human workforce during the economic downturn and the COVID lockdown measures exposed the need for more reliance on in-person construction site visits. During the pandemic, the research team conducted a systematic review to investigate how virtual reality (VR) techniques can be applied to foster more effective construction defect checking and reporting. The findings indicate that VR technologies can be applied in marker-based inspection, which is crucial for developing the automatic defect recording and tracking system. Built on these findings, this paper reports a case study conducted in Melbourne, Australia, demonstrating how VR techniques can be applied to develop practical solutions for enhancing defect checking and reporting in an actual construction project. The solutions focused on reducing the time-consuming and inefficient manual tracking process. This study shows a step forward in assisting human judgment by resolving the in-person marker-based inspections and manual defect tracking encountered in traditional defect checking and reporting practices.
CONSTRUCTION SITE INFORMATION MODELLING APPLIED TO INFRABIM
Authors: Trani Marco Lorenzo , Madaschi Federica , Predieri Guido
Published: June 2024

Construction industry lags in digitalization due to various factors, not least the complexity of implementing the BIM method in all production stages of the supply chain. This research focuses on CoSIM (Construction Site Information Modelling) design applied to the construction of new infrastructure and particularly addresses the issue of the Level-of-Information-Need structure based on the "model use" approach introduced by ISO 19650-1:2018 and the resulting IDS (Information Delivery Specification). To acquire useful information for the research aim, many site visits were conducted for over a year at a highway construction site in Italy to retrace the design process backward and highlight the available ergo-technical information assets and their shortcomings. As a result of the on-site monitoring, a database structure of ergo-technical information was graphically displayed through tabs. Specifically, the IDS made it possible to operationalize the structure theorized in the database through the Level-of-Information-Need in a machine-user dialogue. The IDS system was then interpreted as a combination of the IFC format, favoring the design process in an openBIM environment. This allowed the definition of specific infrastructure ergo-technics PropertySets and their related properties. The correct acquisition of ergo-technical information related to the project procedure is extremely useful regarding time, costs, and workers' Health & Safety planning. Therefore, the study aims to serve as a starting point for defining the contents of complex documents such as the EIR (Exchange Information Requirements) and/or the BEP (BIM Execution Plan) related to the activities of an infrastructure construction site, developed for the so-called "infraBIM" world.
EXPLORING MICROGRIDS AS A PROMISING SOLUTION FOR EQUITABLE ELECTRICITY ACCESSIBILITY
Authors: Talebpour Niousha , Ilbeigi Mohammad
Published: June 2024

Ensuring fair access to electricity in urban areas is a major challenge that calls for a fresh perspective on urban development. One promising approach is to explore innovative solutions, like improving electrical infrastructure using distributed energy systems such as microgrids. The first step toward creating novel distributed solutions is to better understand the equity problem and identify potential implementation challenges. This study addresses this, taking a two-step approach. First, using historical data, the potential association between people's socioeconomic backgrounds and their access to electricity is investigated. This will help to determine if current electrical systems are serving all citizens equitably. Second, insights from experts were gathered through a semi-structured interview to uncover potential challenges in implementing widespread distributed energy systems and equitable energy solutions. By combining the findings from the data analysis and expert input, this study sets the groundwork for future research. This research will focus on identifying new potential solutions to improve equitable access to electricity in urban areas. The results of this study will provide valuable information to decision-makers, helping them identify opportunities and challenges in implementing distributed energy solutions, ultimately leading to a more equitable urban electricity infrastructure.
MARITIME DEPLOYMENT PLANNING AND EXECUTION FOR FIELD TESTING OF OCEAN CURRENT POWER GENERATOR
Authors: Lee Chuanu-Tsung , Chen Yang-Yih , Lee Chung-Pan , Shyue Shiahn-Wern , Liu-Huang Tsung-Lung
Published: June 2024

To develop ocean current power generation, this study explored the planning and execution of the installation and deployment of a 20kW Floating Kuroshio Turbine (FKT) system and anchoring system for field testing in the southwest coast of Liuqiu Island. During the experiment, the 20kW FKT and anchoring system were loaded onto a vessel from the Kaohsiung Port Intercontinental Container Center by a barge and tugboat for deployment in the southwest coast of Liuqiu Island. The field testing of the 20kW FKT was conducted during this period, and upon completion, the unit will be retrieved. The deployment and retrieval of marine devices are easily affected by wave conditions, which increase the difficulty of the operation. Therefore, when designing the hanging and unhooking system, under the consideration of safety, the convenience of operation for the operators should be simplified as much as possible and safety, The study aims to further develop Taiwan's domestic ocean current power generation technology and provides maritime engineering experience through the installation of the 20kW FKT unit and field mooring tests. Additionally, this research seeks to facilitate a local marine green energy industry development through the economic benefits and commercialization of ocean current power generation.
ELEVATING CONSTRUCTION GRADUATE STUDENTS' PEDAGOGICAL PROWESS THROUGH FACULTY DEVELOPMENT INITIATIVES
Authors: Rokooei Saeed , Shojaei Alireza , Tavakkol Ehsan
Published: June 2024

Faculty development programs improve the performance of academic scholars and instructors by providing up-to-date teaching and research management tools and methods. The overall objective of this research was to organize a pilot faculty development program for recent graduates of construction programs in which participants could improve their teaching capabilities and further prepare for their classes. The overarching question of this research was to investigate the perception of participants about different aspects of a program and factors that impact the program outputs. A program was designed and developed around the main topics in construction curricula. The eligibility criterion for participation was being a Ph.D. student in the last stage of the study in a construction program. A cohort of eight students from different construction schools participated in the program in April 2023. A cross-section survey was designed and distributed to participants during the program in which they evaluated the impact of various factors on their teaching preparedness and improvement. The analysis of the data revealed that the importance and necessity of faculty development programs in the construction was greatly felt. In addition, participants indicated positive effects of the program on the course design and management process. The findings of this study provide a pilot structure for administrators and scholars in construction to design and develop general or specialized faculty development initiatives for junior faculty members who join construction schools without prior ample teaching experience.