bluuebunny/crossref_metadata_2025 huggingface dataset:
Intra-articular Distraction Versus Decompression to Treat Basilar Invagination Without Atlantoaxial Dislocation: A Retrospective Cohort Study of 54 Patients
Authors: Zhang Boyan , Qi Maoyang , Xin Zong , Du Yueqi , Zhang Can , Liu Zhenlei , Guan Jian , Wang Zuowei , Jian Fengzeng , Duan Wanru , Chen Zan
Published: June 2023

Objective: The surgical management of basilar invagination without atlantoaxial dislocation (type B basilar invagination) remains controversial. Hence, we have reported the use of posterior intra-articular C1–2 facet distraction, fixation, and cantilever technique versus foramen magnum decompression in treating type B basilar invagination as well as the results and surgical indications for this procedure.Methods: This was a single-center retrospective cohort study. Fifty-four patients who underwent intra-articular distraction, fixation, and cantilever reduction (experimental group) and foramen magnum decompression (control group) were enrolled in this study. Distance from odontoid tip to Chamberlain’s line, clivus-canal angle, cervicomedullary angle, craniovertebral junction (CVJ) triangle area, width of subarachnoid space and syrinx were used for radiographic assessment. Japanese Orthopedic Association (JOA) scores and 12-item Short Form health survey (SF-12) scores were used for clinical assessment.Results: All patients in the experimental group had a better reduction of basilar invagination and better relief of pressure on nerves. JOA scores and SF-12 scores also had better improvements in the experimental group postoperation. SF-12 score improvement was associated with preoperative CVJ triangle area (Pearson index, 0.515; p = 0.004), cutoff value of 2.00 cm2 indicating the surgical indication of our technique. No severe complications or infections occurred.Conclusion: Posterior intra-articular C1–2 facet distraction, fixation, and cantilever reduction technique is an effective treatment for type B basilar invagination. As various factors involved, other treatment strategies should also be investigated.
Morphometric Findings in Medial Patellofemoral Ligament Rupture Compared to Individually-Matched Controls
Authors: Ayşe Gül Kabakci  , Emre Öğüt  , Volkan Tolga Tekbaş  , Memduha Gülhal Bozkir
Published: June 2023

BACKGROUND

The purpose of the present study was to evaluate patellar height and trochlear groove angle in individuals with and without medial patellofemoral ligament rupture for surgical reconstruction and possible clinical use.

METHODS

The study had a retrospective design, and included 149 people (53 females, 96 men) who were between the ages of 18 and 36 admitted to the Orthopedic Clinic of Bartın State Hospital with various complaints in knee joints and different preliminary diagnoses between January 2005 and December 2020. The study population was examined as two groups, those with and without medial patellofemoral rupture. The study included 61 patients with medial patellofemoral ligament rupture and 88 patients without medial patellofemoral ligament rupture. Patellar morphology, patellar height, trochlear morphology, and patellar alignment were measured from digital MRI images.

RESULTS

As a result of the study, while significant differences were detected in trochlear groove angle, there wasn’t significant differences in patella elevation (patellar height) between the groups (with and without medial patellofemoral ligament rupture).

CONCLUSIONS

Our study has versatile evaluation parameters, it will make a significant contribution to the literature.
A Lightweight Conditional Convolutional Neural Network for Hyperspectral Image Classification
Authors: Wu Linfeng , Wang Huajun , Wang Huiqing
Published: June 2023

Deep learning (dl), especially convolutional neural networks (cnns), has been proven to be an excellent feature extractor and widely applied to hyperspectral image (hsi) classification. However, dl is a computationally demanding algorithm with many parameters and a high computational
burden, which seriously restricts the deployment of dl-based hsi classification algorithms on mobile and embedded systems. In this paper, we propose an extremely lightweight conditional three-dimensional (3D) hsi with a double-branch structure to solve these problems. Specifically,
we introduce a lightweight conditional 3D convolution to replace the conventional 3D convolution to reduce the computational and memory cost of the network and achieve flexible hsi feature extraction. Then, based on lightweight conditional 3D convolution, we build two parallel paths
to independently exploit and optimize the diverse spatial and spectral features. Furthermore, to precisely locate the key information, which is conducive to classification, a lightweight attention mechanism is carefully designed to refine extracted spatial and spectral features, and improve
the classification accuracy with less computation and memory costs. Experiments on three public hsi data sets show that the proposed model can effectively reduce the cost of computation and memory, achieve high execution speed, and better classification performance compared with several
recent dl-based models.
Estimation of the Forest Stand Biomass and Greenhouse Gas Emissions Using Lidar Surveys
Authors: Sultanova Rida , Mustafin Radik
Published: June 2023

At the research points, the relationship between the Normalized Difference Vegetation and Normalized Green Red Difference indices is characterized by a determination coefficient equal to 0.52. The estimation of the emission of carbon dioxide and nitrogen oxide in the forest air at an
altitude of 40 m above the level of the soil cover during the growing season showed differences in their values during the daytime and at night. The results helped determine promising methods of inventory of the carbon landfill forest area for aboveground woody biomass assessment based on
data obtained from several sources and land forest estimation research. The research involved: 1) integration of an unmanned aerial vehicle -based digital camera and lidar sensors in order to optimize the efficiency and cost of data collection; 2) taking advantage of high-resolution aerial
photographs and sparse lidar point clouds using an information fusion approach and the ability to compensate for their shortcomings.
Agonia e êxtase: o bloqueio do escritor em Adaptação (2002)
Authors: Lisboa Gabriel Bueno
Published: June 2023

Este trabalho tem como objetivo explorar bloqueios pelos quais um escritor pode passar tendo como base o filme Adaptação (Spike Jonze, 2002), escrito por Charlie Kaufman. Através da análise fílmica procuramos levantar as causas e sintomas para estes bloqueios e a solução encontrada por Kaufman para unir criatividade e funcionalidade num roteiro adaptado. Entendemos que especificidades no roteiro cinematográfico podem dificultar o trabalho daquele que os escreve e que a recorrente tradução de writer’s block para bloqueio criativo em português geralmente não distingue problemas psicológicos daqueles relacionados a métodos e ferramentas de trabalho do roteirista.
Fake news em grupos de WhatsApp e o papel dos letramentos digitais no combate a desinformação
Authors: Voltolini Ana Graciela Mendes Fernandes da Fonseca , Pereira Hilma Pessoa Maciel
Published: June 2023

Este artigo apresenta pesquisa exploratória sobre fake news no ambiente escolar e incentiva o debate na educação. Para isso, foi analisado um corpus sobre a disseminação de boatos relacionados a ataques a escolas, decorrentes dos episódios violentos que ocorreram em instituições do país no primeiro semestre de 2023. O corpus é constituído de boatos compartilhados em grupos em aplicativo de mensagens (WhatsApp) de uma escola pública de Ensino Médio de Cuiabá (MT) em abril de 2023. A partir da análise, o estudo aponta que o caminho para o combate a fake news e a desinformação é a promoção dos letramentos digitais, que por meio de habilidades que envolvem interpretação, seleção e avaliação, fomentam a leitura crítica da informação. Além disso, habilidades no âmbito dos letramentos digitais são urgentes nas escolas e devem ser um compromisso dessas instituições.
A trajetória do Canal Nostalgia no YouTube e o presente do mercado de produção de conteúdo audiovisual
Authors: Lima e Silva Everlon Lucas Lopo , Ferreira Andréa Nogueira do Amaral , Santos Gustavo Souza
Published: June 2023

A relação humana com o formato audiovisual foi construída durante décadas e aprimorada ao longo das gerações. Desde o surgimento do cinema é possível perceber um crescente fascínio dos seres humanos pelo aspecto imagético que o produto audiovisual carrega. A internet possibilitou o surgimento de uma nova era para o audiovisual assim como para todos os outros formatos midiáticos existentes, a partir daqui surgem novos hábitos de consumo e com eles, novas demandas e formatos onde os consumidores também podem se tornar seus próprios produtores. O Canal Nostalgia no YouTube, personificado pelo produtor de conteúdo Felipe Castanhari, é um expoente do mercado de produção de conteúdo audiovisual plataformizado e do esteio mercadológico desta atividade criativa. Desse modo, o objetivo deste estudo foi analisar a trajetória da produção de conteúdo em vídeo no Brasil, considerando meios, táticas, abordagens e prerrogativas futuras, tendo por caso de análise o Canal Nostalgia no YouTube. Desenvolveu-se um estudo de caso de aporte documental sobre o canal e adicionou-se a perspectiva de produtores de conteúdo audiovisual em exercício para reflexão geral sobre o cenário. Observou-se que a democratização do conteúdo e o acesso a essas novas tecnologias de comunicação foi extremamente benéfico e transformador para a maneira como produzimos e consumimos mídia. Pessoas com grandes ideias, mas sem acesso a grandes plataformas como a televisão puderam desenvolver-se com poucos recursos e se transformaram em gigantes divulgadores de conhecimento e entretenimento do mercado. Compreendeu-se também que as transformações neste formato são cíclicas e resultarão sempre na evolução e nunca na extinção umas das outras.
Rabies neutralizing antibody titers in Korean dogs and cats intended for overseas travel
Authors: Yang Dong-Kun , Park Yu-Ri , Kim Ha-Hyun , Kim Eun-Ju , Lee Hye Jeong , Cheong Young-Ju , Hyun Bang-Hun
Published: June 2023

Animals imported from abroad are a cause of rabies outbreaks in many countries. Therefore, rabies serology testing for dogs and cats traveling abroad is an important measure to reduce the incidence of rabies. Rabies virus antibodies were measured in sera collected from 2,367 dogs and 894 cats between 2017 and 2021. A serum sample with a value of 0.5 IU/mL or higher was considered a pass. The overall pass rates for rabies virus were 96.4% in dogs and 98.4% in cats. The mean rabies virus neutralization assay titers were higher in cats than in dogs and in female than in male animals. According to age, 6-year-old dogs and 9-year-old cats had the highest virus neutralization assay titers. Of the failure cases, 53.0% (53/100) were dogs or cats less than 1 year old. Although the average failure rates in dogs and cats were low at 3.5% and 1.6%, respectively, the factors influencing failure were age and vaccine manufacturer. Therefore, it is necessary to observe the vaccination interval and timing of blood collection after boosting.
Porcine epidemic diarrhea viruses from Vietnam: isolation, characterization, and neutralizing activity
Authors: Do Van Tan , Truong Quang Lam , Dao Hoai Thu , Nguyen Thi Lan , Shin Minna , Shin Kyeong Ryeol , Hahn Tae-Wook
Published: June 2023

Porcine epidemic diarrhea (PED) is characterized by acute enteritis, watery diarrhea, weight loss, dehydration, and death, with high mortality in neonatal piglets. In this study, 3 virus isolates collected in Vietnam between 2016 and 2017 were propagated successfully in Vero cells at high virus titers. Sequence analysis of the full-length spike (S) gene showed that all 3 isolates belong to genogroup 2b, which is closely related to other prevalent Asian strains. A comparison of the amino acid sequence revealed a 98.19% to 99.13% homology with the Vietnam isolates circulating during 2013–2015, suggesting that field PED viruses (PEDVs) are evolving continuously. Experiments in animals showed that the antisera from guinea pigs immunized with the vaccine strain resulted in higher levels (5 log2) of neutralizing antibodies against the homologous strain and a relatively moderate level of neutralizing antibodies against the field isolates. This finding would be helpful in selecting a PEDV strain for vaccine development.
Detection of virulence, specific genes and antibiotic resistance of isolated Salmonella spp. strains from rabbits infected with salmonellosis
Authors: Chuong Huynh Van , Tuan Nguyen Minh , Anh Nguyen Thi Nhu , Phuong Le Thi Lan , Hoa Nguyen Xuan
Published: June 2023

Salmonella spp. are pathogens involved in most salmonellosis in rabbits. This study examined Salmonella disease in rabbits raised in Thua Thien Hue, Vietnam. Two hundred and 56 rectal swabs of rabbits were taken, and a carrier rate of 33.98% was found. In addition, all the isolated Salmonella spp. strains were 100% motile; positive for H2S, catalase, Voges Proskauer, coagulase, citrate, maltose, and dextrose; and negative for indole, methyl red, urease, oxidase, sucrose, and lactose. The Kirby-Bauer method showed that these Salmonella strains were susceptible to doxycycline (93.2%), tetracycline (84.1%), and levofloxacin (65.9%). On the other hand, they were highly resistant to streptomycin (95.5%), ampicillin (93.2%), colistin (40.9%), and gentamicin (34.1%). Furthermore, polymerase chain reaction used to screen for virulence and specific genes of Salmonella strains showed that all Salmonella strains isolated carried InvA, fimA, and Stn.
Evaluation of commercial immunochromatography test kits for diagnosing canine parvovirus
Authors: Hyeon Lee-Sang , Yang Dong-Kun , Kim Eun-Ju , Park Yu-Ri , Lee Hye Jeong , Hyun Bang-Hun
Published: June 2023

Rapid immunochromatography test (RICT) kits are commonly used for the diagnosis of canine parvovirus (CPV) because of their rapid turnaround time, simplicity, and ease of use. However, the potential for cross-reactivity and low sensitivity can yield false-positive or false-negative results. There are 4 genotypes of CPV. Therefore, evaluating the performance and reliability of RICT kits for CPV detection is essential to ensure accurate diagnosis for appropriate treatment. In this study, we evaluated the performance of commercial RICT kits in the diagnosis of all CPV genotypes. The cross-reactivity of 6 commercial RICT kits was evaluated using 8 dog-related viruses and 4 bacterial strains. The limit of detection (LOD) was measured for the 4 genotypes of CPV and feline panleukopenia virus. The tested kits showed no cross-reactivity with the 8 dog-related viruses or 4 bacteria. Most RICT kits showed strong positive results for CPV-2 variants (CPV-2a, CPV-2b, and CPV-2c). However, the 2 kits produced negative results for CPV-2 or CPV-2b at a titer of 105 FAID50/mL, which may result in inaccurate diagnoses. Therefore, some kits need to improve their LOD by increasing their binding efficiency to detect all CPV genotypes.
The Application of Nature-Based Early Childhood Education Curriculum
Authors: Azizah Nurul , Ismaiyah Nurul , Nisa Khoirun
Published: June 2023

The nature-based curriculum is applied at PAUD in every learning activity daily by considering the situation and conditions, including the weather on the implementation day. The nature-based curriculum is considered effective enough to achieve learning objectives; teachers can easily stimulate six early childhood development aspects. Aspects of early childhood development that experience significant development are in the physical, motoric, and cognitive aspects; it is shown by the development of students who are increasingly proficient in using accomplices during activities. Meanwhile, in the cognitive aspect of early childhood, it is easier to remember what the teacher conveys because they have direct experience. This type of research is a library qualitative approach that obtains data sources through library information such as books, scientific journals, magazines, newspapers, and documents. Data triangulation was done by triangulating sources and techniques through interviews and documentation. This research aims to determine the implementation of early childhood education activities with a nature-based curriculum based on the principles of nature-based learning. The results of this study are the implementation of children's learning with a nature-based curriculum in accordance with the principles and stages of nature-based learning.
Sumang Gayo as Stimulation of Moral Development in Early Childhood
Authors: Munawarah  , Ikhsan  , Ghafur Muhammad
Published: June 2023

Stimulation of early childhood development can be done in various ways. This includes the development of children's moral values ​​and character, which is currently decreasing, and the moral damage that occurs causes a negative impact on themselves and their environment. This study uses the Library Research Study. Data analysis in this study uses data reduction, data display, and conclusion. Research results show that there are four sumang that can stimulate the development of children's morals and character, namely: Sumang Penengonen (Vision), Sumang Pelangkahen (Running rules), Sumang Kenunulen (Sitting rules), Sumang Perceraken (Rules of speaking). The impact of sumang stimulation on children's moral development and character is that children understand better how to behave correctly, such as being polite and courteous. Children will have a character that cares about others. Children will have a gentle character. Increase children's self-awareness. Improve children's language skills. Children behave independently, have mutual respect for others, can solve problems, have a sense of responsibility, and can adapt to new people.
Educator's Strategy in Stimulating Speech Delay for Children with Mild Mental Retardation
Authors: Ngaisah Nur Cahyati , Zubaedah Siti , Nurjanati Azizah
Published: June 2023

When communicating with the surrounding environment, speech delay or speech disorder generally occurs in normal children or children with special needs with language development disorders. Children with special needs with mental retardation tend to have various disorders, including speech delay, which requires treatment as soon as possible with the right strategy and stimulation. This study aims to describe educator strategies in stimulating mild retarded disabled children who experience speech delay. This study uses a descriptive approach through case studies of a child with mild mental retardation category having speech delay disorder. Data collection techniques used observation and interviews conducted directly at SLB-C Dharma Rena Ring Putra I Yogyakarta. At the same time, the data analysis technique uses the Miles and Huberman models with the data analysis stages, namely data reduction, data presentation, concluding, and verification by testing data wettability using triangulation techniques. The study results show that the language development of children with speech delay disorders in children with mild mental retardation can develop optimally through strategies that educators provide with various stimulations. The findings in this study are aspects that significantly influence dealing with speech delay disorder, namely parenting parents, speech therapy activities, educators understanding children's language in communicating, and exciting learning media through videos or pictures.
The Nationalist-Religious Political Image in the Construction of the News of Ganjar Pranowo's Appointment as a Presidential Candidate
Authors: Jumaynah Fullah
Published: June 2023

This article attempts to read the political image that was highlighted by Ganjar Pranowo when he was appointed as the presidential candidate of the PDI-P by analyzing news framing from two mass media with quite different ideologies, namely Kompas.com and Republika.co.id. This study uses a descriptive-qualitative approach using the Robert N. Entman framing analysis model. From the research that has been done, it can be interpreted that Kompas.com displays aspects that are embedded directly with symbols that are identical to the PDI-P, such as Soekarno's cap and the venue of for the determination event at the Batu Tulis Palace, which was Soekarno's residence. Apart from that, Kompas.com also displays sources from internal PDI-P. Meanwhile, Republika.co.id displays several emphases linking religious symbols related to Megawati's beliefs and mentioning her attitude as a statesman. In addition, the news displayed by Republika.co.id tends to choose sources from political observers as the title choice, compared to direct opinions from actors or parties who understand.
Assessment of the Impact of Anti-Hormonal Treatment on Bone Health in Patients With Breast Cancer Using Machine-Learning Analysis
Authors: Park Heeseung , Park Meeyoung , Kim Keunyoung , Kang Taewoo
Published: June 2023

Purpose: This study analyzed the effects of anti-hormonal treatment (HTx) on bone health using real-world evidence and machine-learning analysis.Methods: We extracted 20 clinical variables and patient history of HTx by reviewing the records of 244 patients treated for breast cancer between January 2014 and June 2018 at Pusan National University Hospital. Baseline and first follow-up dual-energy absorptiometry were analyzed. To identify which of the 20 clinical variables were highly associated with the patients’ bone mineral density and trabecular bone score (TBS), we applied partial least squares discriminant analysis (PLS-DA) and MetaboAnalyst. A self-organizing map (SOM) was used to sort the patient groups based on the selected variables.Results: The patients were classified as ‘no change’ (n=161, 70.6%), ‘deteriorated’ (n=43, 18.9%), or ‘improved’ (n=24, 10.5%) according to the change in TBS during the follow-up period. The baseline TBS value was significantly lower in the improved group. The top five variables (age, HTx, duration of vitamin D and/or calcium intake, cancer stage, and body mass index) were selected using PLS-DA, which generated variable importance value (VIP) scores for all variables and high VIP scores contributed greatly to patient classification. To identify the patients’ clinical patterns using the top five selected variables, a 3×4 grid structure SOM was generated. Clusters were selected to represent the most improved, no change, and most deteriorated groups.Conclusion: This study evaluated the clinical association between HTx and bone health in patients with breast cancer under various clinical conditions and found that the characteristics of patients included in the study were too heterogeneous to be classified in clusters. Therefore, additional data should be collected for future research.
Comparative analysis of filterability behavior of B30 and B40 biodiesel blends on various porosity and dimension of fuel filter
Authors: Pramudito Yogi , Fathurrahman Nur Allif , Auzani Ahmad Syihan , Wibowo Cahyo Setyo , Anggarani Riesta , Soemanto Ariana , Sugiarto Bambang
Published: June 2023

This report is focused on comparative analysis of the impact of using biodiesel blends containing more than 30% biodiesel in diesel engine filtration systems. The objective of this study is to support the sustainability of the mandatory biodiesel utilization program by more than 30%. To evaluate filterability behavior of high-percentage biodiesel blends, namely B30 and B40 (30 and 40%-vol biodiesel on diesel fuel), the study employed the ASTM D 2068 Filter Blocking Tendency (FBT). After filter rig test, fuel filter pressure was also evaluated using the JIS 1617 standard method. It is important to note that fuel filter plays an important role in removing contaminants from fuel, and, hence, the effect of the difference in filter porosity needs to be observed with pressure difference across fuel filter monitored at the flow rate (0.03 m3/h and fuel temperature (15 ⁰C and 25 ⁰C). Furthermore, the effect of changes in temperature and surface morphology on the characteristics of filter was observed in this study. Based on FBT analysis, a polynomial regression (R2 > 0.98) was used to describe the relationship between FBT value and the effect of biodiesel blends on filterability. It was concluded that the temperature, monoglyceride content, and FAME concentration in the diesel fuel influenced their FBT. However, the rise in waxy particles at 15oC (near Cloud Point) could result in a more significant average pressure drop than at 25⁰C (ambient temperature). It was also found that a higher biodiesel mixture potentially results in a higher-pressure difference due to the lower fuel temperature and the formation of waxy contaminants that can clog filter.
X-ray shielding properties of bismuth-borate glass doped with rare earth ions
Authors: Kheswa Bonginkosi Vincent
Published: June 2023

In this study, the X-ray shielding competence of the 15Bi2O3 + 75H3BO2 + 10Sm2O3, 15Bi2O3 + 75H3BO2 + 10Nd2O3, and 15Bi2O3 + 75H3BO2 + 10CeO2 glasses was investigated using the Phy-X/PSD simulation software and validated using the XCOM simulation software. The Sm3+-doped bismuth-borate glass gave the highest linear attenuation coefficients and effective atomic number, and the lowest half-value layer, tenth-value layer, and mean free path. Thus, it is the most effective radiation shielding material compared to the Nd3+- and Ce4+-doped bismuth-borate glasses. It was also observed that the Sm3+-doped bismuth-borate glass also has better radiation-shielding competence than various glass systems that have been recently investigated in the literature.
Performance analysis of a flexible wearable antenna with low SAR for biomedical application
Authors: Kuppusamy Ramasamy M. , Abdulkareem Sapna B.
Published: June 2023

This article presents a conformal monopole antenna for wearable application in ISM band frequency of 2.45 GHz. The antenna has a return loss of 50.18 dB with good radiation performance. The gain of the antenna is 1.09 dBi which is improved to 3.28 dBi using a metasurface consisting of 3 × 3 array elements. The proposed metamaterial integrated antenna is fabricated on 1 mm thick flexible PDMS substrate. The metamaterial improves the gain while reducing the specific absorption rate (SAR) of the antenna. The geometry size of the metamaterial integrated antenna is 50 × 50 × 24 mm3. The loading effect of antenna by body is analyzed with a hand phantom model. Flexibility and conformability of antenna is analyzed by bending the antenna with various radii in x and y direction. Measured results of the fabricated prototype demonstrate the safety of the suggested wearable antenna for biomedical applications.
Generalizing the Elo rating system for multiplayer games and races: why endurance is better than speed
Authors: Powell Ben
Published: June 2023

We introduce a non-standard generalization of the Elo rating system for competitions involving two or more participants. The new system can be understood as an online estimation algorithm for the parameters of a Plackett–Luce model which can be used to make probabilistic forecasts for the results of future competitions. The system’s distinguishing feature is the way it treats competitions as sequences of elimination-type rounds that sequentially identify the worst competitors rather than sequences of selection-type rounds that identify the best. The significance of this important modelling choice is discussed and its consequences are explored. Finally, our generalized Elo system’s predictive power is demonstrated using data from Formula One racing.
Safety decision analysis of collapse accident based on “accident tree–analytic hierarchy process”
Authors: Ren Xiaoyu , Du Zhaoli , Wang Jinrong , Yang Fen , Su Tian , Wei Wei
Published: June 2023

To reduce the hazards of collapse accidents in the construction process and to ensure that the lives, health, and property of construction workers are protected, this study used the theory of safety system engineering to identify the hazards of collapse accidents, analyze the hazards, predict the consequences, evaluate the systemic risks, and evaluate the effects and improve them. At the same time, the risk factors of collapse were evaluated qualitatively and quantitatively by using the analysis methods of fault tree analysis (FTA) and the analytic hierarchy process (AHP). Finally, according to the evaluation results, the main factors causing collapse accidents were found; this provided a reliable and practical basis for the prevention of collapse accidents. Then, according to the decisive factors, corresponding measures were taken in advance to achieve the aim of preventing and controlling collapse accidents. The results show that equipment maintenance, material inspection, and construction site safety management play an important role in preventing collapse accidents.
Synthesis of Ag and Cu nanoparticles by plasma discharge in inorganic salt solutions
Authors: Horák Jakub , Nikiforov Anton , Krčma František , Březina Matěj , Kozáková Zdenka , Dostál Lukáš , Kalina Michal , Kalina Lukáš
Published: June 2023

In recent years, nanoparticles have emerged as an important player in a broad range of applications, especially thanks to recent advances in their synthesis. The silver and copper nanoparticles are often used due to their antibacterial and fungicidal activities, and this article presents the results of the nanoparticle synthesis using electrical glow discharge generated directly in a volume of their salt solutions. Therefore, there is no influence of air (i.e. reactive nitrogen species) as it is usual in other commonly used approaches. Nanoparticles were prepared under various experimental conditions, and they were characterized by ultraviolet/visible spectrometry, dynamic light scattering, X-ray photoelectron spectroscopy, and high-resolution scanning electron microscopy. Particles were produced without any surfactant or stabilizing agent, and some of them showed higher resistance against agglomeration during their short-term (days) storage. The nanoparticle formation mechanism was confirmed by the fast camera imaging. Thus, the developed approach can be applied for simple environmentally friendly nanoparticle production for various applications.
Comprehensive behavioral study of C57BL/6.KOR-ApoEshl mice
Authors: Ueno Hiroshi , Takahashi Yu , Murakami Shinji , Wani Kenta , Miyazaki Tetsuji , Matsumoto Yosuke , Okamoto Motoi , Ishihara Takeshi
Published: June 2023

Background

Apolipoprotein E (ApoE) is associated with Alzheimer’s disease (AD) and cognitive dysfunction in elderly individuals. There have been extensive studies on behavioral abnormalities in ApoE-deficient (Apoeshl) mice, which have been described as AD mouse models. Spontaneously hyperlipidemic mice were discovered in 1999 as ApoE-deficient mice due to ApoE gene mutations. However, behavioral abnormalities in commercially available Apoeshl mice remain unclear. Accordingly, we aimed to investigate the behavioral abnormalities of Apoeshl mice.

Results

Apoeshl mice showed decreased motor skill learning and increased anxiety-like behavior toward heights. Apoeshl mice did not show abnormal behavior in the Y-maze test, open-field test, light/dark transition test, and passive avoidance test.

Conclusion

Our findings suggest the utility of Apoeshl mice in investigating the function of ApoE in the central nervous system.
International student mobility to non-traditional destination countries: evidence from a host country
Authors: Apsite-Berina Elina , Robate Liga Daniela , Berzins Maris , Burgmanis Girts , Krisjane Zaiga
Published: June 2023

Since the early 1990s, Latvia has experienced high levels of emigration. Still, current dynamics show that net migration has nearly ceased and that a growing share of new immigrant populations are from non-European countries. One of the leading causes of a sizable share of recent immigration is the globalisation of higher education and the mobility of international students. However, in recent decades, international student mobility (ISM) has brought attention to various aspects of higher education, educational export, and migration trends. This has captured the interest of academics and practitioners worldwide. Receiving countries recognise the importance of attracting international students as potential residents, especially as they undergo unfavourable demographic changes. The paper aims to present empirical evidence on ISM in Latvia by assessing international student daily life and study experiences. The focus is on examining the perspective of a host country. The study utilises statistical data, survey data and a case study of the University of Latvia to analyse the link between the origin of the student and their choosing Latvia as a non-traditional destination for quality higher education. The findings indicate that Latvia is an attractive destination for young migrants from diverse geographies, including Europe and Southeast Asia and consistent flows of students from former Soviet countries. One of the main factors that draw international students to Latvia is the affordability of education offered in English, providing a “second chance” for achieving success and specific clusters of degree students from European countries studying medicine.
Application of the Random Forest method on the observation dataset for visibility nowcasting
Authors: Sládek David
Published: June 2023

Accurate visibility forecasting is essential for safe aircraft operations. This study examines how various configurations of the Random Forest model can enhance visibility predictions. Preprocessing techniques are employed, including correlation analysis to identify fundamental relationships in weather observations. Time-series data is transformed into a regular Data Frame to facilitate analysis. This study proposes a classification framework for organizing visibility data and phenomena, which is then used to develop a visibility forecast using the Random Forest method. The study also presents procedures for hyperparameter tuning, feature selection, data balancing, and accuracy evaluation for this dataset. The main outcomes are the Random Forest model parameters for a three-hour visibility forecast, along with an analysis of errors in low visibility forecasts. Additionally, models for one-hour forecasts and visibility forecasting under precipitation are also examined. The resulting models demonstrate a deterministic forecast accuracy of approximately 78%, with a false alarm rate of around 6%, providing a comprehensive overview of the capabilities of the Random Forest model for visibility forecasting. As anticipated, the model demonstrated limitations in accurately simulating fast radiative cooling or abrupt decreases in visibility caused by precipitation. Specifically, in relation to precipitation, the model achieved an accuracy of 79%, yet exhibited a false alarm rate of 19%. Additionally, this method sets a foundation for enhancing prediction accuracy through the inclusion of supplementary forecast data, while its implementation on real-world datasets expands the reach of machine learning techniques to the members of the meteorological community.
International experience of using special knowledge in the investigation of counterfeiting
Authors: Tymchyshyn A.M.
Published: June 2023

The article highlights the theoretical and practical aspects of the investigation of counterfeiting as a socially dangerous phenomenon that has a transnational character. The need to implement international experience in the use of special knowledge in the investigation of counterfeiting, as well as the formation and role of Interpol in coordinating the work of law enforcement agencies of different countries in this direction, is considerer.The general processes of European and world interconnection, the globalization of economic, political and social relations, supported by new communication and technological opportunities, are increasingly covering the sphere of economic crime, in particular the most widespread and most dangerous phenomenon for society, such as counterfeiting. Increasingly, this is manifested in the fact that, together with law-abiding citizens, it has become easier for criminals to penetrate across state borders, which has caused the spread of criminal manifestations in the transnational space. The exit of criminal activity beyond the borders of specific states gives rise to international crime, which puts it at a much higher level of danger compared to domestic crime. The problems and tasks associated with this phenomenon have become widely spread, and, as a matter of fact, they have become the subject of practical solutions by law enforcement agencies around the world and scientific consideration by scientists.Along with other serious crimes of a transnational nature, such as terrorism, illegal drug trafficking, human trafficking, crimes against the state, smuggling, domestic and foreign scientists also single out counterfeiting, which poses the greatest threat to the integrity of financial and commercial institutions of individual states and the world community in general.
Sistema integrado para la vigilancia y gestión de floraciones algales nocivas en la provincia de Cienfuegos, Cuba
Authors: Rojas-Abrahantes Gabriel Liván , Castellanos-González María Elena , Miranda-Vera Clara Elisa , Díaz-Asencio Lisbet , Hernández-Leyva Olidia , Rojas-Lantigua Livan , Moreira-González Ángel Ramón
Published: June 2023

Las floraciones algales nocivas pueden tener consecuencias negativas en la salud, economía y diversidad biológica de los ecosistemas marinos. En la provincia de Cienfuegos, ubicada al centro-sur de Cuba, han ocurrido diferentes eventos de estas floraciones en su bahía de igual nombre, con impactos negativos en la salud pública y la economía del país, así como para la localidad. El objetivo de este trabajo fue diseñar e implementar un sistema de vigilancia y gestión de esos eventos para la provincia de Cienfuegos, con vistas a disponer de mecanismos de acción intersectorial bien definidos, ante la aparición de tales microrganismos, basado en los principios del Manejo Integrado de Zonas Costeras. Durante el año 2021, se constató científicamente eventos de floraciones de las algas aludidas, por lo que se desarrolló un taller para el diseño y la propuesta de dicho sistema, utilizando el criterio de especialistas claves en la gestión de los eventos mencionados en el territorio. El sistema de vigilancia y gestión tuvo como principal característica garantizar la integración de los sectores relacionados con la problemática en la provincia. Este sistema fue dividido en cinco etapas: vigilancia, comunicación, activación del sistema, gestión directa y evaluación de impactos. En octubre de 2021, se logró implementarlo con resultados satisfactorios, tras la ocurrencia de una floración del dinoflagelado Vulcanodinium rugosum. Su puesta en práctica contribuyó a mitigar los impactos de las floraciones algales nocivas en diferentes sectores de desarrollo en la provincia de Cienfuegos.
Sentiment Analysis of Russia-Ukraine Conflict Tweets Using RoBERTa
Authors: Ramos Leo , Chang Oscar
Published: June 2023

[Objective] The moment Russia officially invaded Ukraine, the world experienced a period of tension and uncertainty. As a social release valve digital communication, channels increased their number of users and activity, generating a large amount of data. Twitter, in particular, being one of the most popular channels for sharing information and opinions, exploded with activities related to this historical moment. And as with many other social events, such as COVID-19, this social network became one of the main sources of information, opinion, and knowledge. This paper analyzes sentiments in tweets related to the armed conflict between Russia and Ukraine. [Methodology] The analyzed dataset contains tweets from January 1, 2022, through March 3, 2022, and was collected using event-related hashtags. In total, 603,552 tweets in English and 1,664 in Russian were analyzed. To perform emotion classification, DistilRoBERTa variant and the pre-trained XLM-RoBERTa-Base model were used, respectively. English tweets were classified into seven emotions: anger, disgust, fear, joy, neutral, sadness, and surprise. Russian tweets were classified into positive negative, and neutral polarities. [Results] The results showed that most English tweets convey fear and anger as predominant feelings, reaching 32.08% and 15.18% of the total tweets analyzed, respectively. Regarding tweets in Russian, the majority presented negative polarity, with 86.83% of the total. Some of the most recurrent phrases in the analysis allude to support for Ukraine and call for a halt to the war. Likewise, phrases of concern for the crisis, weapons, and fatalities are recurrent. [Conclusion] As expected, most people were concerned about the armed conflict and upset and angry about its consequences. Future works could use more tweets to improve the analysis and increase the time range to be studied. The analysis could also be segmented to study the sentiments of tweets according to different groupings and compare them with other societies, for instance, tweets could be segmented by country and analyzed accordingly.
DIAGNÓSTICO ULTRASSONOGRÁFICO INTRAUTERINO DE CARDIOMEGALIA FETAL EM FELINO
Authors: BUZO R. S. , SAMPAIO J.  M. S. , PINHEIRO S. C. M. , SANTOS N. S. , SILVA H. C. , PINOTI L. D. R.
Published: June 2023

A ultrassonografia é um dos principais métodos de diagnóstico gestacional, no qual se realiza: biometria, monitoramento de batimentos e organogênese, detecção de anormalidades e avaliação da circulação sanguínea materno-fetal. Nesse quesito, o diagnóstico ultrassonográfico intrauterino de anormalidades fetais vem adquirindo espaço com o desenvolvimento de equipamentos mais avançados, tendo potencial para se tornar uma ferramenta de triagem para tal. Baseado na escassez observada nesse aspecto, visa-se relatar o diagnóstico ultrassonográfico intrauterino de uma alteração fetal em uma felina gestante. Foi atendida uma felina da raça persa, 3 anos, com histórico de monta natural há 40 dias. Na ultrassonografia visibilizou-se quatro fetos vivos com aproximadamente 38 dias. Uma segunda avaliação ultrassonográfica ocorreu após 12 dias, notando-se um feto com cardiomegalia, oscilação da frequência cardíaca e sofrimento fetal, enquanto os demais fetos apresentavam-se dentro da normalidade. O terceiro exame foi feito após quatro dias, visibilizando ausência de batimento cardíaco e presença de líquido em espaço pleural no feto em questão, confirmando o óbito. O parto natural ocorreu após uma semana, com nascimento de três filhotes vivos e um natimorto. Ao exame necroscópico do natimorto, confirmou-se cardiomegalia generalizada. Conclui-se que a ultrassonografia é um método padrão-ouro para diagnóstico de anormalidades fetais, permitindo planejar o parto e interceder de maneira precoce conforme a situação. Assim, esse trabalho enriquece a literatura com maiores informações relacionadas a malformações fetais observadas antes do parto, contribuindo assim com as condutas obstétricas em pequenos animais.
UTILIZAÇÃO DE CANECA DE ALUMÍNIO COMO MATERIAL ALTERNATIVO PARA TEMPERATURA DE GLOBO DE VERNON
Authors: BRENNECKE K. , PEREIRA L. A. M. , ZEFERINO C. P. , SOARES V. E. , DIAN P. H. M. , SANTOS JUNIOR I. , ZAMPIERI J. H. , HOLANDA M. C. F. , ORLANDI C. M. B.
Published: June 2023

Diversos estudos relacionados à viabilidade e eficiência do uso de materiais alternativos ao globo de Vernon têm sido realizados, principalmente em decorrência ao preço elevado do cobre, componente do instrumento padrão. O objetivo foi avaliar a eficiência da utilização de caneca de alumínio como material alternativo para substituição do globo de Vernon. Para a confecção do protótipo empregou-se uma caneca de alumínio, utilizada em pistola de pintura, com capacidade de 50 ml. A caneca foi pintada com tinta preto-fosca, em duas camadas e um termômetro de mercúrio foi inserido ao centro. Para realização dos testes foram utilizados quatro equipamentos (dois globos de Vernon e dois globos negros alternativos). Foram efetuados testes prévios de comportamento temporal. Estabelecido o tempo, as temperaturas dos globos foram coletadas durante sete dias consecutivos, em três períodos, de 15 minutos cada. Os registros de temperatura foram realizados a cada cinco minutos, num total de 84 por equipamento. Os dados foram submetidos a análise de correlação de Pearson. Os resultados indicaram correlação positiva com o r2 de 0,9927, estabelecendo uma forte correlação entre os resultados de temperatura média do globo negro alternativo e globo de Vernon. Conclui-se que o globo negro alternativo do tipo caneca de alumínio mostrou-se eficiente para aferição da temperatura de globo negro em estudos de ambiência em substituição ao Globo de Vernon.
Viajes y circunstancias de Pedro Cubero Sebastián
Authors: Alba Sanz R.
Published: June 2023

Sucinto recorrido por la vida, los viajes y las obras de Pedro Cubero Sebastián (1645?-1700?), el primer viajero en rodear el mundo en sentido inverso al de las naos de Elcano, con la particularidad de hacer la mayor parte de su camino por tierra. Se presta especial atención a su recorrido por el Próximo Oriente. Se establecen también algunas precisiones sobre la cronología de su vida y viajes.Palabras clave: Pedro Cubero Sebastián, Viajes siglo XVII, Vuelta al mundo, Biografía, Cronología, Próximo Oriente. Abstract:A concise look at the life, travels and works of Pedro Cubero Sebastián (1645?-1700?), the first person to travel around the world in the opposite direction to the ship of Elcano, with the special feature that he did it most of the time by land. Especially emphasized is his way through the Near East. There are some precisions on the chronology of his life and travels, too.Keywords: Pedro Cubero Sebastian, Travels in the 17th century, Around the world, Biography, Chronology, Near East.
Modeling hydrogen peroxide bleaching of soda pulp from oil-palm empty fruit bunches
Authors: Ferrer Ana , Rosal Antonio , Valls Cristina , Roncero Blanca , Rodríguez Alejandro
Published: June 2023

The influence of the variables soda (0.5-3.0%), hydrogen peroxide (1.0-6.0%) and time (1-5 h) in the bleaching of soda pulp of empty fruit bunches (EFB) from oil-palm, on the properties of bleached pulps, was studied. Polynomial and neural fuzzy models reproduced the results of brightness, kappa number, and viscosity of the pulps with errors less than 10%. By the simulation of the bleaching of pulp, using the polynomial and neural fuzzy models, it was possible to find optimal values of operating variables, so that the properties of bleached pulps differed only slightly from their best values and yet it was possible to save chemical reagents, energy, and plant size, operating with lower values of operating variables. Thus, operating with 1.13% soda concentration and 2.25% hydrogen peroxide concentration for 3 hours, a pulp with a brightness of 75.1% (8.1% below the maximum) and a viscosity of 740 mL/g (10.4% less than the maximum value), was obtained.