bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Defocusing Variation on Laser Wire Additive Manufacturing Morphology and Plasma Plume Change
Authors: Yan Chenxiao , Han Hongbiao , Zhang Peng , Wang Rui , Hu Jiayang
Published: June 2024

To examine the impact of defocusing amount on the deposition accuracy in the Laser Wire Additive Manufacturing (LWAM) process, a one-factor variable experiment was designed. This experiment analyzed the plasma plume geometry, melting pool spatter, and melting pool length, along with observing bead geometry and porosity. The following conclusions are drawn: Variations in defocusing amount caused changes in energy distribution, which affected the stability of the LWAM process and led to changes in the surface accuracy of the deposited layer and the melt pool morphology. Increasing the defocusing amount enlarged the spot area, diminished laser power density, and effectively reduced spattering during LWAM. Surface roughness increased with defocusing, transforming the hump morphology from an initial smooth fish-scale pattern to a periodic undulating pattern. Larger defocusing decreases the melt pool area and keyhole depth, this reduction aids gas escape from the keyhole, thus mitigating porosity defects in LWAM.
Bus service quality at transfer areas. An assessment procedure based on temporal disutility
Authors: Salicrú Miquel , Mension Josep , Estrada Miquel
Published: June 2024

The design of many transit networks is based on transfer stations. Transfers allow better service connectivity and the avoidance of deploying unaffordable door-to-door services among origin and destination points of low demand. However, these potential improvements in terms of cost and performance are achieved at the expenses of forcing users to incur a temporal disutility at transfer facilities. In this paper, we consider that the quality experienced by users at transfers mainly depends on the temporal disutility. It consists of the walking time between loading areas, the waiting time for bus arrivals at the loading area, and the variability of those times. Hence, a procedure to measure the quality at the transfer areas is proposed, integrating the three relevant components: the physical layout of the transfer area; synchronisation between connected routes; and discrepancies between their actual and scheduled service. A quadratic expression of the previous concepts is justified as a valid approach to measure the total quality of the transfer by transit operators with available data. The calibration of the parameters can be obtained considering the customer perception, the consensus of experts, and the partial consensus of experts with regularity conditions. The proposed model can monitor the transfer performance attributes that depend on service operations and allows attributing the loss of quality to each component involved in the process. The new methodology developed through the paper was applied to Barcelona’s New Bus Network, although it would be generally applicable in other modes of transport.
Impact of Genetic Polymorphisms on the Sulfation of Dehydroepiandrosterone and 17-β estradiol by Human Cytosolic Sulfotransferase SULT2B1a
Authors: Alatwi Eid , Bairam Ahsan
Published: June 2024

Dehydroepiandrosterone (DHEA) is considered an endogenous steroid hormone precursor, and 17-ß Estradiol (E2) is one of the estrogen steroid hormones. Of the thirteen known human cytosolic sulfotransferases (SULTs), SULT2B1a has been shown to be expressed in steroid hormone-responsive tissues such as the prostate, ovary, and placenta, as well as the fetal brain. Previous studies have demonstrated that SULT2B1a is capable of sulfating 3β-hydroxysteroids such as DHEA and pregnenolone. The present study aimed to investigate the effects of human SULT2B1SNPs on the enzymatic characteristics of SULT2B1a allozymes in mediating the sulfation of DHEA and E2. To inspect the effects of single nucleotide polymorphisms of the SULT2B1gene on the sulfation of DHEA and E2 by SULT2B1a allozymes, 13 recombinant SULT2B1a allozymes were produced, expressed, and purified using established procedures. 13 SULT 2B1a nonsynonymous missense coding SNPs (cSNPs) were selected among numerous identified human SULT 2B1a SNPs by a comprehensive database search. The corresponding cDNAs, packaged in pGEX-2TK expression vector, and encoding the selected 13 SULT2B1a allozymes, have been generated by performing site-directed mutagenesis. These were then bacterially expressed in BL21 E. coli cells and purified using glutathione-Sepharose affinity chromatography. The purified allozymes were tested for their ability to sulfonate DHEA and E2. In terms of the kinetic parameters, the wild-type SULT2B1a exhibited higher enzyme affinity towards DHEA than with E2. In comparison with the wild-type SULT2B1a, the purified allozymes displayed differential sulfating activities towards DHEA and E2. Accordingly, these findings indicate an apparent effect of SULT2B1 cSNPs on the sulfating activities of SULT2B1a allozymes toward DHEA and E2, and may provide for a better understanding of the pharmacokinetics of DHEA and E2 in individuals with differing SULT2B1 a genotypes.
Comparative effectiveness of Sildenafil Citrate and Estradiol Valerate as adjuvants during Clomiphene Citrate-assisted ovarian stimulation cycles in Patients with unexplained infertility: A double-blind randomized controlled trial in Kisangani, DRC
Authors: Bosenge-Nguma Jean-Didier , O’yandjo Antoine Modia , Djang’eing'a Roland Marini , SKV Juakali , Otuli Noël Labama , Ntokamuda Justin Kadima , Chin Alexis Heng Boon , Bosunga Gedeon Katenga
Published: June 2024

Objective
This study aimed to assess the effect of sildenafil citrate and estradiol valerate as adjuvant therapy during ovarian stimulation cycles with clomiphene citrate in patients with unexplained infertility to update infertility management guidelines in Kisangani.
Method
A double-blind, randomized controlled trial was conducted for two years (from October 1, 2021, to October 31, 2023). The population included 148 patients, 74 of whom were on clomiphene citrate + sildenafil citrate (CCSC) regimens and 74 of whom were on clomiphene citrate + estradiol valerate (CCEV) regimens for three months. The primary indicator was the conception rate, with secondary outcomes encompassing endometrial thickness, appearance and vascularity, the number of mature follicles and ovulation rate.
Results
Perifollicular flow was predominantly high-grade (P = 0.002), and the ovulation rate and clinical pregnancy rate were greater (P = 0.006) in the CCSC group than in the CCEV group. However, biochemical pregnancy rate, endometrial vascularity/thickness, and the number of Graafian follicles were not significantly different. The two groups were comparable in terms of sociodemographic and clinical characteristics. The mean duration of attempting to conceive was 4.39 years versus 4.36 years, and the mean AFC was 11.51 versus 11.46, respectively, in the CCSC versus CCEV groups. Secondary infertility was the most frequent type in each of the two participant assignment groups.
Conclusion
As an adjuvant, sildenafil increases the rate of clinical pregnancy more than does estradiol in patients with unexplained infertility undergoing ovarian stimulation with clomiphene citrate. However, both sildenafil citrate and estradiol valerate can protect the endometrium from the harmful antiestrogenic effects of clomiphene.
Study registration: PACTR 202310849449401 ( Pan African Clinical Trials Registry)
Yield and Growth Duration of Maroon rice landraces measured in traditional settings
Authors: Pinas Nicholaas , Awie Jerry R. Tjoe , Dongstra R. Evanne , Maat Harro , Schranz M. Eric , de Loosdrecht Marieke van , Andel Tinde van
Published: June 2024

Rice, the most consumed cereal worldwide, has two domesticated species: Asian and African rice. Commercial cultivars, almost all Asian rice, are mostly selected for high yields. Traditional landraces are often selected for different traits, such as time to maturity or resistance against common stress factors, including bird attacks and poor soils. Maroons, descendants of enslaved Africans in Suriname and French Guiana, cultivate a rich diversity of rice landraces. They categorize landraces into short, medium, and long-maturation varieties and maintain that fast-ripening crops with moderate yields facilitated their flight from enslavement, while once settled in a safe place, there was time for landraces with longer ripening periods and higher yields. Previous authors assumed that all Maroon landraces had low yields (700–1000 kg/ha), but their performance in traditional farming systems has not been studied. We followed the growth and harvest of 28 Maroon rice landraces and two commercial cultivars in Maroon farmer fields, using traditional farming methods, at three locations. We show that, in farmer-managed fields, Maroon rice can yield 2600 kg/ha (average 1665 kg/ha), without any agrochemicals or machinery. Contrastingly, the commercial cultivars on the Maroon farmer fields had a low yield (625–1205 kg/ha), partly due to bird predation. The maturation time varied between 110 to 183 days, but the three Maroon maturation categories showed significant overlap. Our study indicates that Maroon rice performance can only be fairly evaluated if measurements are taken in traditional Maroon farming systems since this is the environment in which the varieties were originally selected.
Silicon-on-sapphire slot waveguide based evanescent field absorption sensor for detection of trace gases in mid IR
Authors: Joshi Karishma , Meena Bharat Lal , Gehlot Kanchan
Published: June 2024

The design of a novel CMOS-compatible evanescent field gas sensor based on a silicon-on-sapphire slot waveguide is proposed for sensing trace gases in the mid-infrared. A detailed numerical study is carried out to obtain the optimum design parameters and determine the detection efficiency of the sensor for four examples of trace gases: carbon dioxide, nitrous oxide, ammonia, and methane gas by operating the waveguide sensor at their characteristic absorption wavelengths of 2.76 \textmu m, 2.86 \textmu m, 3.00 \textmu m, and 3.31 \textmu m, respectively. A high evanescent field ratio of the order of 50\(%\), small waveguide length ranging from 0.75 cm to 1.36 cm, and a detection limit down to a few tens of ppb have been obtained for the optimized sensor design for all four gases. The high sensitivity, low detection limit, small footprint and CMOS compatibility of the proposed sensor make it suitable for on-chip applications.
Systematic Surveillance and Meta-Analysis of Antimicrobial Resistance and Food Sources from India and Taiwan
Authors: K Himanshu , Mukherjee Riya , Kaur Kirtanjot , Ahmad Saheem , Raj V. Samuel , Pandey Ramendra Pati , Chang Chung-Ming , K Gunjan
Published: June 2024

Human exposure to antimicrobial resistance (AMR) through food is now very imperfectly understood, creating a significant gap in the design of interventions. The interchange of AMR genes and the transfer of AMR bacteria from animals to humans through the food chain necessitate comprehensive methods to risk reduction. With a focus on AMR in bacterial species isolated from food products, foods (of both animal and non-animal origin), and ambient samples, the current meta-analysis gathered up-to-date information on the epidemiology of AMR in animal-source food chain. As a result, the combined prevalence of AMR across the various food sources was calculated. From the 18,784 food samples obtained as a result of selected publications, 7,676 (40.9%) samples were contaminated, including 4343 (56.6%) and 3363 (43.4%) samples from Taiwan and India, respectively. Meat (chicken, pork, and beef), fish and milk all have moderate to medium potential for AMR exposure to both Gram-positive and Gram-negative foodborne pathogens such S. aureus, Clostridium, E. coli, Salmonella, etc. Antibiotic resistance to β-lactam, fluoroquinolone, carbapenem etc, is present in the majority of food samples. The results of this study emphasize the persistent danger of antimicrobial residue in animal-derived foods in Taiwan, India, and other nations with comparable customs.
Colorectal cancer prognosed to advanced stage and its associated factors in oncologic unit of Dessie Comprehensive Specialized Hospital, Northeast Ethiopia, 2023
Authors: Jibat Abebe Bekele , Fissha Yonas , Tegegne Belachew , Edmealem Afework
Published: June 2024

Introduction: The progression of colorectal cancer to an advanced stage makes its prognosis more difficult and further magnifies the health burden associated with the disease. In spite of this fact, the magnitude of colorectal cancer, which is prognosed at an advanced stage, and the associated factors are not well studied in Northeast Ethiopia.
Methods: A hospital-based cross-sectional study was conducted among 354 selected patients from March 20, 2018 to March 20, 2023, using the lottery method. Data collectors collected data by reviewing a medical chart using a data abstraction chart. Descriptive statistics and binary logistic regression were applied. Variables with P < 0.25 in bivariable analysis were candidates for multivariable analysis. Variables whose P value is less than 0.05 in multivariable analysis were considered as statistically associated factors.
Result: The magnitude of colorectal cancer case that were prognosed to at an advanced stage was 83.3%. Being aged (AOR = 6.1; 95% CI: 2.5–14.9), living at rural area (AOR = 6.6, 95% CI: (2–21)), not medically insured (AOR = 6.8; 95% CI: 2.3–19.9), delayed to visit a health facility (AOR = 5.5; 95% CI: (2.2–13.8)), delayed to seek treatment after being diagnosed (AOR = 3.1; 95% CI: (1.1–8.4).), and poor adherence to treatment (AOR = 6.9; 95% CI: (2.1-22.6) were factors associated with the prognosis of colorectal cancer to advanced stage presentation.
Conclusion: In this study, magnitude of colorectal cancer prognosed to advanced stage was high. Being aged, rural residency, not medically insured, delay in health facility visit, delay in seeking treatment after diagnosed and poor adherence to treatment were significantly associated with prognosis of colorectal cancer to advanced stage presentation. Especial follow up of the rural community, expanding medical insurance, and improving treatment adherence are strategies that delay the prognosis of colorectal cancer to advanced stage.
Phytosociological analysis on tree diversity in Remuna block, Balasore, Odisha, focusing on its biomass, major macronutrients, and carbon stocks
Authors: MUDULI BAISHNAB CHARAN , Sahoo Netajee Tapas Kumar , Dhall Subhadarshani
Published: June 2024

Global climate changes, habitat loss, and reduction of biodiversity are significant threats demanding an investigation into the relationship between tree diversity and human well-being to maintain biodiversity and carbon stock. Tree species diversity was studied to comprehend concurrent variation in the phyto-sociological analysis, biomass, carbon stock changes, and five major macronutrient contents in the tropical moist deciduous area of Remuna block, Balasore, Odisha, India. A total of 30 sample plots (20 x 20 metres) were laid that included 422 tree individuals of 39 species belonging to 33 genera and 17 families. The Fabaceae family was the most dominant, with 11 species. The dominant tree species was Shorea robusta with an important value of index (IVI) of 61.48. Some of the dominant species that contributed to above-ground biomass were Shorea robusta, Ficus benghalensis, and Ficus religiosa. Total biomass and carbon stocks were maximum in Shorea robusta and was found to be 6508.32 ton and 3254.16 ton, respectively, and minimum in the species Syzygium cumini with 8.32 ton and 4.16 ton respectively. By using biomass equations and through conversion of nutrient concentrations to nutrient contents, calcium was found to be most abundant, followed by nitrogen, potassium, magnesium, and phosphorus in Shorea robusta. The study will be helpful in understanding changes in the plant community and thereby developing location-specific strategies for conservation of valuable rare plants in the Remuna Block as well as sustainable utilisation of biodiversity in the future.
Effect of Different Types of Organic Manures and Mulching Materials on Growth, Yield and Quality of Carrot (Daucus Carota L.) in Diguna Fango Woreda, South Ethiopia
Authors: Kuma Amanuel
Published: June 2024

Carrot is a root vegetable crop. The management of agronomic practices is an important factor that strongly affects the growth, yield and quality of carrots. A field experiment was conducted to evaluate the growth, yield and quality of carrots affected by different types of organic manure and mulching materials in Diguna Fango Woreda, South Ethiopia. The study consisted of four organic manures (control, 20 t PM ha − 1 , 20 t FYM ha− 1 and 20 t mixed manure (10 t PM + 10 t FYM) ha− 1 and three types of mulching (no mulching, sawdust mulching and grass mulching) laid in the RCBD, with four replications in a factorial arrangement. Analysis was performed using the SAS software package. Root diameter, root fresh weight, root dry weight, marketable yield and total root yield were significantly (P ≤ 0.05) affected by the interaction effect of organic manure and mulching materials. The main effects of organic manure and mulching also significantly (p ≤ 0.05) affected plant height, leaf number, leaf length, root length, unmarketable root yield, root dry matter content, forked roots, cracked roots and TSS. Among the different combinations, 20 t of mixed manure (10 t PM + 10 t FYM) with grass mulching ha− 1 surpassed all the other combinations in terms of maximum root length (22.45 cm), root diameter (6.60 cm), root fresh weight (179.25 g), root dry weight (26.16 g), marketable root yield (27.90 t ha− 1) and total root yield (33.92 t ha− 1) during the experimental year. Similarly, PM with grass mulching also produced better results pertaining to carrot growth and yield. Based on these results, the highest net benefit (360,520 Birr ha− 1) with an MRR of 3803% was obtained from the treatment combination of 20 t FYM with grass mulching. Therefore, the use of 20 t FYM with grass mulching could be recommended for carrot production in the study area. Since this study is limited to the use of organic manure with mulching materials during one season and at one location, the results should be repeated across seasons and locations.
Effect of sex and age on acute myocardial infarction presentation and location: low-income country insight
Authors: Rikabi Hiba , Alolabi Hani , Anouz Rama , Kurmaly MHD Sami , Alkassem Omar
Published: June 2024

Introduction:
Age and sex-based differences have been recognized as contributing factors to myocardial infarction presentation. Recognition of these differences is important for timely clinical diagnosis.
Aim
This article aims to examine symptom presentation differences, by sex and age, in patients with acute myocardial infarction.
Methods
We reviewed 181 medical records of patients with acute myocardial infarction who were admitted to the emergency department of the two biggest central hospitals in Damascus.
Results
The average age was 61.94 years, 20% were women, 85.5% had STEMI, and the most common presentation was heavy chest pain. Patients were categorized into 6 age groups: >40 years (4.5%), 40–49 years (14.7%), 50–59 years (30.6%), 60–69 years (28.9%), 70–80 years (15.9%) and < 80 years (5.1%). No statistically significant difference was found in the presentation of men and women with acute myocardial infarction. Patients younger than 40 commonly presented with referred pain (p = 0.002) especially to either arm (p = 0.009), while older age groups presented with heavy chest pain (p = 0.058).Young patients had right coronary artery occlusion much less often (p = 0.050), including extensive anterior (p = 0.010) and lateral infarctions (p = 0.019). Anteroapical infarctions were associated with patients older than 80 (p = 0.015).
Conclusion
The results of this study indicate that myocardial infarction presentation in men and women have no significant difference. However, Younger patients' presentation is much more complex and less likely to be noticed, compared to the typical presentation of old patients. More awareness of symptom clusters that younger patients present by could help reach a faster diagnosis and better prognosis.
Study of the causes of high pulmonary arterial pressure at Damascus Hospital
Authors: saffaf Sedra , Romelley Lilas Al Arnaoot , Almardine Heba
Published: June 2024

Introduction
Pulmonary hypertension refers to high blood pressure in the pulmonary arteries that carry oxygen-poor blood from the heart to the lungs with a mean pulmonary artery pressure of ≥ 25 mm Hg.
Materials and methods
A descriptive study was conducted on a sample of 246 patients attending Damascus Hospital. Their pulmonary pressure was measured, and several axes related to high pulmonary pressure were studied, including general medical antecedents and then studying the final diagnosis of the cause. A descriptive study of the sample was conducted and then an analytical study that served the research objectives.
Results
A sample size of 248 patients was collected from the patients attending Damascus Hospital, of which the percentage of males was 51.6%, while the percentage of females was 48.4%.
The age of the largest percentage of the sample, about 54.9%, was in the category (61 to 90 years).
The percentage of smokers in the sample was 46.7%, about 2.8% of the sample, recorded that they were alcoholic.
The majority of the sample recorded that they suffer from several conditions together, at a rate of 65.6%, about 70.3%, recorded no history of surgery.
75.2% of the sample recorded that they suffer from heart disorders, While 15.9% of the sample had disorders and problems in the respiratory system.
The vast majority of the sample, 90.2%, had an elevated pulmonary pressure of more than 25 mmHg.
the most common cause (final diagnosis) was heart failure, 35.3% .
Conclusion
• Women were found to be at risk of having high pulmonary pressure with a risk factor of 1.5% more than men
• While the results of the one-way analysis of variance test showed that there is a significant effect and an important correlation between the patient’s age and high pulmonary pressure, as the risk increases with a risk factor of 0.43% as age increases.
• There is an important correlation and significant effect of smoking on the degree of pulmonary hypertension.
• There is an important correlation and significant effect of alcohol consumption on the degree of pulmonary hypertension.
• There is an important, statistically significant correlation to the presence of heart disease in the patient and high pulmonary pressure, as heart patients are at risk of having high pulmonary pressure with a risk factor of 1.12% more than patients without heart disease.
• Patients with respiratory problems and disorders are at risk of developing pulmonary hypertension, with a risk factor of 1.36%.
• There is an important, significant correlation between taking medications (antidepressants, appetite suppressants) and the degree of pulmonary hypertension.
• There is an important correlation between the final diagnosis and the cases reported as causes of pulmonary hypertension.
Application of the CALPUFF model in emergency response assessment for radiological events in metropolitan area.
Authors: Chen Jian-Pu , Teng Jen-Hsin , Zeng Teng-Ping , Hsu Yu-Xia
Published: June 2024

Due to the possibility of radioactive events or dirty bomb events occurring in urban areas near buildings with a relatively small impact radius (within 1-2 kilometers), an effective and rapid assessment of their extent and impact is essential for emergency response strategies. In this research, the CALPUFF model is introduced as the basis for conducting a series of tests and improvements to create a localized radioactive events impact assessment system. The CALPUFF model is recommended by the US EPA and will be combined with meteorological data from the Central Weather Bureau's mesoscale numerical weather forecast model and terrain data with a 30-meter horizontal resolution from Taiwan's Ministry of the Interior. This localized system aims to simulate and predict the outdoor radiation intensity or pollution range for future scenarios, reducing the health risks and pressure on emergency personnel exposed to radiation, and facilitating necessary protective action decisions.
Exogenous glucose oxidation during exercise is positively related to body size
Authors: Ijaz Abdullah , Collins Adam J. , Moreno-Cabañas Alfonso , Bradshaw Louise , Hutchins Katie , Betts James A. , Podlogar Tim , Wallis Gareth A. , Gonzalez Javier T.
Published: June 2024

Current guidelines do not consider body size for carbohydrate intake during exercise. This study assessed whether larger people can oxidise more exogenous glucose during exercise than smaller people. Fifteen cyclists were allocated into two groups based on body mass (SMALL, < 70 kg body mass, n = 9, 2 female) or (LARGE, > 70 kg body mass, n = 6) matched for lactate threshold (SMALL: 2.3 ± 0.4 W⋅kg− 1, LARGE: 2.3 ± 0.3 W⋅kg− 1). SMALL completed 120 min of cycling at 95% of lactate threshold1. LARGE completed two trials in a random order, one at 95% of lactate threshold1 [thereby exercising at the same relative intensity (RELATIVE)], and one at an absolute intensity matched to SMALL (ABSOLUTE). In all trials, cyclists ingested 90 g⋅h− 1 of 13C-enriched glucose. Total exogenous glucose oxidation was (mean ± SD) 33 ± 8 g⋅h− 1 in SMALL versus 45 ± 13 g⋅h− 1 in LARGE-RELATIVE (mean difference: 13 g⋅h− 1, 95%CI 2 to 24 g⋅h− 1, p = 0.03]. Large positive correlations were observed for measures of exogenous carbohydrate oxidation versus body size (body mass, height and body surface area; e.g., body surface area versus peak exogenous glucose oxidation, r = 0.85,95%CI: 0.51 to 0.95, p < 0.01). When larger athletes reduced the intensity from RELATIVE to ABSOLUTE, total exogenous glucose oxidation was 39 ± 7 g⋅h− 1 (p = 0.43 versus LARGE-RELATIVE). In conclusion, the capacity for exogenous glucose oxidation is, on average, higher in larger athletes than smaller athletes during exercise. Body size may therefore be a consideration in tailoring sports nutrition guidelines for carbohydrate intake during exercise.
Program Evaluation and Review Technique (PERT) Analysis to Predict Completion Time and Project Risk Using Discrete Event System Simulation Method
Authors: Yudistira I Gusti Agung Anom , Nariswari Rinda , Arifin Samsul , Abdillah Abdul Azis , Prasetyo Puguh Wahyu , Susyanto Nanang
Published: June 2024

The prediction of project completion time, which is important in project management, is only based on an estimate of three numbers, namely the fastest, slowest, and presumably time. The common practice of applying normal distribution through Monte Carlo simulation in Program Evaluation and Review Technique (PERT) research often fails to accurately represent project activity durations, leading to potentially biased project completion prediction. Based on these problems, a different method is proposed, namely, Discrete Event Simulation (DES). The research aims to evaluate the effectiveness of the simmer package in R in conducting PERT analysis. Specifically, there are three objectives in the research: 1) develop a simulation model to predict how long a project will take and find the critical path, 2) create an R script to simulate discrete events on a PERT network, and 3) explore the simulation output using the simmer package in the form of summary statistics and estimation of project risk. Then, a library research with a descriptive and exploratory method is used for data collection. The hypothetical network is used to obtain the numerical results, which provide the predicted value of the project completion, the critical path, and the risk level. Simulation, including 100 replications, results in a predicted project completion time and a standard deviation of 20.7 and 2.2 weeks, respectively. The DES method has been proven highly effective in predicting the completion time of a project described by the PERT network. In addition, it offers increased flexibility.
The Determinant Factors of Shopping Cart Abandonment Among E-commerce Customers in Indonesia
Authors: Sundjaja Arta Moro , Tatuil Ariel Velasco , Scholus Dionisius Vincent , Restiani Yolanda Dwi
Published: June 2024

Predicting the non-purchase behavior of potential customers, such as the abandonment of online shopping carts, is a pivotal factor in determining the success of companies. Despite several conducted studies, further investigation is still required to gain a profound understanding of the underlying causes of these phenomena. The research aims to analyze the motivating factors behind shopping cart abandonment among ecommerce customers in Indonesia using a quantitative method. Furthermore, the population size is undefined, and the sample consists of 200 respondents selected through purposive sampling. The sample size is determined by five times the indicator number. The data analysis is conducted using Structural Equation Modeling (SEM) through SmartPLS 4.0.8.5, and the Coefficient of determination (R2) value for shopping cart abandonment is found to be 37.5%. The results show that complicated checkout, information overload, complicated policies, and limited shipping options positively impact shopping cart abandonment. Complicated checkout emerges as the most significant variable. Meanwhile, perceived cost and emotional ambivalence have no impact. The research also provides theoretical contributions and suggests future research for e-commerce companies and merchants. The theoretical contribution is how user emotions, user experience, merchant policies, and e-commerce regulation affect shopping cart abandonment. From the practical implications, e-commerce companies should focus on the user experience during checkout to reduce shopping cart abandonment.
El liderazgo transformacional del Dr. José López Yepes: una óptica personal y profesional
Authors: Hernandez Pacheco Federico
Published: June 2024

El presente artículo describe el liderazgo transformacional de José López Yepes por medio de aspectos vivenciales, hechos y situaciones que se dieron durante el trato académico, personal y profesional que se tuvo con el ser humano, el académico e investigador y el amigo. Se desarrolla bajo el método del caso desde los hechos, para comprobar sustentos conceptuales y teóricos sobre el liderazgo, que en la praxis, el Dr. José López Yepes representa adecuadamente.
Análise da complementaridade de fontes intermitentes no nordeste brasileiro
Authors: Lopes da Silva Stéfany , Maria Alexandre Linard Fabíola , Rocha Almeida Aryfrance , Ferreira dos Santos Junior Bartolomeu
Published: June 2024

Este estudo teve como objetivo gerar mapas de complementaridade entre as principais fontes intermitentes do nordeste brasileiro ao longo do ano característico, com base no cálculo de índices de correlação. Para isso, foi avaliado o potencial energético da região por meio da reprodução de mapas de potencial com fontes renováveis incluindo as geolocalizações de usinas eólicas, hidrelétricas e solares já existentes na região, além disso, foram verificadas as correlações sobre a existência de complementariedade entre os recursos eólicos, solares e hídricos, por meio da proposição de um ano característico para calcular os índices de correlação que seriam visualizados através dos mapas produzidos pelo software QGIS, visando demonstrar o efeito de complementaridade entre recursos renováveis na região. Os resultados obtidos mostram que a expansão da aplicação de fontes intermitentes deve ser encorajada, estimulando as combinações complementares de ativos visando aumentar a variedade e segurabilidade de geração de energia. Além disso, mostra-se que a região possui elevados índices de correlação capazes de contribuir nos estudos de expansão da matriz com a implantação de usinas híbridas que podem fornecer energia com mais equidade durante um determinado período. Observa-se ainda que, praticamente todas as usinas eólicas existentes na região podem ser facilmente integradas a usina solar fotovoltaica, além da possibilidade de construção de uma usina solar flutuante no reservatório da UHE Pedra do Cavalo, devido aos elevados índices de correlação que a região possui, utilizando assim a complementaridade como a principal aliada na oferta e geração de energia.
Fluidodinâmica e segregação da mistura de areia e resíduo de malte em leito de jorro cônico
Authors: Pazin Almeida Natalia , Lira Taisa , Silverio Beatriz Cristina , Vieira Neto José Luiz , Santos Kassia
Published: June 2024

Um dos setores mais tradicionais do agronegócio brasileiro é a indústria cervejeira. O cereal mais utilizado nesse processo é a cevada, gerando como principal subproduto resíduo de malte, uma biomassa lignocelulósica. A pirólise em leito de jorro é uma tecnologia promissora para geração de energia renovável a partir de resíduos agroindustriais. Assim, para verificar a possibilidade de aplicação do leito de jorro como um reator de pirólise, foram realizadas análises fluidodinâmicas da mistura de resíduo de malte e areia. Observou-se como a altura estática do leito e a fração de massa da biomassa influenciam a condição de jorro mínimo e crítico, e a segregação das partículas. As correlações analisadas apresentaram bons resultados na previsão da velocidade mínima de jorro, com um erro relativo de 4,83%. Para a queda de pressão máxima, a melhor correlação mostrou um erro relativo de 13,91% e, para a queda de pressão do jorro mínimo, um erro relativo de 5,45%. Também, em relação à segregação foi observado que a base do leito apresentou taxas mais elevadas de segregação, com uma maior presença de partículas de areia.
Iluminação a LED – avaliação das lâmpadas LED disponíveis para o consumidor brasileiro
Authors: Miguel de Souza Teófilo , Rodriguez dos Santos Humberto
Published: June 2024

A iluminação consome cerca de 15% da energia elétrica disponível. O nosso modo de vida, diuturna, demanda que o meio ao nosso redor se adeque ao que precisamos. As lâmpadas, invenção centenária, em continua evolução, vem-se apresentando em diversas formas e tecnologias. O momento é da iluminação a LED, que está levando à descontinuidade de diversas outras tecnologias. Neste trabalho, escolhemos algumas marcas muito usadas para fazer uma avaliação de sua performance, e para tal utilizamos o laboratório do Ponto de Luz, nas dependências da UNESP para jogar um pouco de luz no assunto
Demographic and stomatological profiles of pacientes at the Instituto de Saúde de Nova Friburgo
Authors: Isabella de Britto Perdigão Ferreira  , Juliana Tristão Werneck  , Maria Carolina de Lima Jacy Monteiro Barki  , Rebeca de Souza Azevedo  , Karla Bianca Fernandes da Costa Fontes  , Thaylla Núñez Amin Dick  , Bruna Lavinas Sayed Picciani
Published: June 2024

Epidemiological studies are essential, since through them it is possible to formulate a clinical profile, to determine the prevalence and incidence of lesions, as well as characterizing particularities specific to the environment where such tasks are performed. Objective: To perform an epidemiological survey of the main oral lesions diagnosed at the Stomatology Outpatient Clinic of the Instituto de Saúde de Nova Friburgo ISNF/UFF, drawing a demographic and clinical profile. Material and methods: A retrospective and observational study, conducted with data collection in the medical records of patients treated at the stomatology service in 2018. The information collected were gender, skin color, age, locality, occupation, income, schooling, and oral injury. Results: Data were collected from 150 patients, 93 (62%) women, 79 (53%) white, aged between 2 and 94 years, mean age of 53 years, 124 (83%) from the downtown of Nova Friburgo, 32 (21%) retired, 30 (22%) received a minimum wage and 42 (28%) incomplete middle school. Regarding oral lesions, 38 (25%) patients had actinic cheilitis, 18 (12%) prosthetic stomatitis and 5 (3%) oral cancer. Conclusion: Middle-aged women sought the outpatient clinic more frequently, and some lesions, if diagnosed early, especially actinic cheilitis, may prevent oral cancer.
Efficiency of ultrasonic, sonic and mechanical complementary cleaning methods in the removal of filling material remaining of oval curved canals
Authors: Murilo Priori Alcalde  , Letycia Accioly Simões Coelho  , Jussaro Alves Duque  , Rodrigo Ricci Vivan  , Marco Antônio Hungaro Duarte
Published: June 2024

The aim of this study was to compare efficacy in removing filling material remaining in oval and curved canals using different complementary cleaning methods. Material and methods: Sixty single[1]rooted tooth with oval shaped canal with curvature were prepared up to size 25 and .08 taper, filled and subsequently retreated. The teeth were then scanned in micro-CT and divided into 6 groups (n = 10) according to the complementary cleaning method: CUI with Irrisafe, CUI with NiTiSonic, PUI with Irrisafe, PUI with NiTiSonic, Eddy and XP-endo Finisher R. After, the teeth were newly scanned in micro-CT. The volume of the filling material remaining before and after the application of the complementary methods was calculated and then calculated the percentage of material removed total and in the apical region. Data were submitted to the Kruskal-Wallis, Dunn and Wilcoxcon tests with a significance level of 5%. Results: No suplementary cleaning method completely removed the remaining of filling material, however, all significantly reduced the volume, both in the apical region and in the total root canal (p<0.05). There was no significant difference among the groups tested, regardless of the region analyzed (p>0.05). Conclusion: No method was effective in completely removing the remaining filling material. All complementary cleaning methods significantly reduce the volume of material, with no difference among them.
Hipersensibilidade dentinária: etiologia, diagnóstico e tratamento
Authors: Emerson Menin  , Guilherme Benini  , Gabriela Dágios Amadori  , Christiana Almeida Salvador Lima  , Felipe Belmonte Archett
Published: June 2024

A hipersensibilidade dentinária é definida como um desconforto elevado gerado quando ocorre a perda do material de proteção, o esmalte dental, ou a remoção do cemento da raiz com a exposição da dentina, seguida da exposição dos túbulos dentinários ante estímulos de baixa intensidade e alta frequência. Objetivo: Compreender as causas da hipersensibilidade dentinária e identificar os tratamentos atuais disponíveis no mercado odontológico. Material e métodos: Trata-se de uma revisão bibliográfica narrativa e exploratória a respeito das causas e dos tratamentos da hipersensibilidade dentinária. Para a obtenção dos dados necessários, este estudo usou produções científicas do período de 1997 a 2022 das bases de dados SciELO, Google Acadêmico e Pubmed, utilizando a expressão “dentin hypersensitivity” junto com as seguintes palavras[1]chave: “dentin sensitivity”, “hypersensitivity”, “risk factors”, “protocols”, “dentin desensitizers”, “lasers”, “pain” and “systematic review”. Ao somar as bases de dados, dos 178 artigos selecionados por meio de critérios de inclusão e exclusão, foram incluídos 20 estudos, com metodologias diferentes entre si, abordando as causas da hipersensibilidade dentinária e os tratamentos disponíveis atualmente. Resultados e Discussão: A hipersensibilidade dentinária apresenta fatores que contribuem diretamente para gerar desconforto e causar dor ao paciente. O tratamento da hipersensibilidade dentinária pode ser realizado de duas formas, terapia domiciliar ou terapia em consultório. Conclusão: As causas da hipersensibilidade dentinária podem ser definidas pela abertura dos túbulos dentinários em decorrência de estímulos térmicos, químicos e mecânicos. Em relação ao tratamento, não existe um consenso na literatura sobre o mais eficaz ou ideal, sendo da preferência do profissional a escolha do método terapêutico.
Intervenção clínica para lesões de cárie em dentina de dentes permanentes posteriores: revisão de literatura
Authors: Larissa Holthausen  , Felipe Gomes Dallepiane  , Daniela Jorge Corralo
Published: June 2024

O uso generalizado de flúor tem interferido na progressão de lesões cariosas, observando-se situações em que a estrutura do esmalte dental se apresenta hígida ou praticamente intacta e a lesão progride lentamente na dentina. Essas lesões, classificadas com o código 4 pelo Sistema Internacional para a Detecção e Avaliação de Cáries (ICDAS) (do inglês, International Caries Detection and Assessment System), são de difícil decisão sobre qual a melhor intervenção clínica. Objetivo: Descrever as possíveis formas de intervir em lesões de cárie em dentina, classificadas com o código ICDAS 4, por meio de técnicas de mínima intervenção, a fim de verificar qual o tratamento é mais conservador para ser utilizado na prática clínica. Material e métodos: Foi realizada uma revisão da literatura da área. Para tal, fez-se uma busca nas bases de dados PubMed, SciELO e Lilacs, nos idiomas inglês e português. Resultados: O tratamento das lesões de cárie pela técnica de remoção seletiva de dentina se mostrou efetivo e indicado sempre que a extensão das lesões atingir mais da metade da dentina, pois preserva a estrutura dental e previne a exposição da polpa. O selamento das lesões é efetivo e demonstra ter indicação, sendo mais favorável em lesões que atinjam até a metade da dentina. Conclusão: Ambos os tratamentos se revelaram eficientes, devendo ser indicados com base em critérios clínicos e na melhor evidência científica.
Tratamentos térmicos aplicados às ligas de níquel-titânio (NiTi) para prevenção de fratura do instrumental – uma revisão sistematizada da literatura
Authors: Flávio Resende Neves Teixeira  , Leandro Montes Pedroza Carvalho  , Pablo Donato Costa  , Jader Pinto  , Martinelle Ferreira da Rocha Taranto  , Raquel Auxiliadora Borges  , Flares Baratto-Filho  , César Penazzo Lepri  , Isabela Ribeiro Madalena
Published: June 2024

Vários tratamentos térmicos de ligas níquel-titânio (NiTi) foram desenvolvidos para melhorar as propriedades mecânicas e o desempenho clínico da terapia endodôntica. Objetivo: Realizar uma revisão sistematizada da literatura sobre a potencialidade dos tratamentos térmicos aplicados às limas endodônticas com ligas de NiTi para aumentar a resistência à fratura do instrumental. Material e métodos: Os estudos incluídos nesta revisão de literatura sistematizada seguiram os parâmetros PICOS. A busca foi realizada na base de dados PubMed utilizando os seguintes descritores: endodontia, fratura de instrumento, análise de fratura de equipamento. Os dados dos estudos incluídos foram compilados e organizados de acordo com as características do estudo. Resultados: A busca recuperou 44 títulos e resumos. Apenas 18 artigos foram elegíveis para avaliação de artigo completo. Os resultados demonstram que diversos instrumentos são propostos na atualidade. Em relação aos testes in vitro de resistência a fratura, os intrumentos Hyflex – tecnologia CM-wire – se destacam. Conclusão: Os achados revelam que instrumentos com tratamento térmico CM-Wire são mais resistentes a fratura. Contudo mais estudos in vivo são necessários.
Defeito osteoporótico focal da medula mimetizando um cisto residual: relato de caso
Authors: Yasmin Peçanha Madureira Corrêa  , Letícia Côgo Marques  , Adriana Raymundo Bezerra  , Paulo da Costa Rodrigues  , Adriane Baptista Maia  , Vanessa de Paiva Reis  , Danielle Castex Conde
Published: June 2024

O defeito osteoporótico focal da medula é um defeito ósseo raro, de etiologia desconhecida, que produz uma imagem focal radiolúcida. Apesar de mimetizar patologias ósseas verdadeiras, raramente é mencionado no diagnóstico diferencial de lesões radiolúcidas dos maxilares. Seus achados clínicos e radiográficos, embora possam ser sugestivos, não são suficientes para estabelecer o diagnóstico definitivo. Objetivo: Relatar um caso de defeito osteoporótico focal da medula que se desenvolveu em um local de uma extração dentária e mimetizou um cisto residual. Relato de caso: Paciente do sexo masculino, 38 anos, com queixa de dor espontânea leve, há aproximadamente um ano, apresentou em exame radiográfico uma lesão radiolúcida unilocular, de aproximadamente 1,5 cm em seu maior diâmetro, na região do dente 46, que já havia sido extraído havia 10 anos. O exame histopatológico exibiu células hematopoiéticas, tecido adiposo e algumas trabéculas ósseas sem particularidades, sendo compatível com o diagnóstico de defeito osteoporótico focal da medula. Conclusão: O defeito osteoporótico focal da medula é uma condição rara que pode afetar os maxilares. Sua presença em locais que foram submetidos a exodontia reforça a hipótese de que um trauma local pode ter papel no desenvolvimento dessa condição.
Endodontia guiada: relato de caso clínico e revisão de literatura
Authors: Henrique Oliveira Carvalho  , Michel Sena Fernandes Faria Lima  , Frank Ferreira Silveira  , Eduardo Nunes
Published: June 2024

Calcificação ou obliteração pulpar é o acúmulo de tecido mineralizado no interior da câmara pulpar e do sistema de canais radiculares. Localizar e tratar endodonticamente um dente com canal radicular obliterado mostra-se um desafio, pois o tratamento é mais demorado e pode levar a complicações. Uma boa alternativa é a utilização de um guia endodôntico para guiar o acesso aos canais radiculares calcificados. Objetivo: Relatar um caso clínico de um dente com calcificação no terço cervical do canal em que foi empregada a técnica de endodontia guiada e apresentar uma revisão de literatura de artigos abrangendo essa temática com ênfase no acesso em canais obliterados. Material e métodos: Analisaram-se artigos científicos, publicados entre os anos de 2016 e 2021, obtidos nas bases de dados Portal Capes e PubMed, abrangendo a temática “tratamento endodôntico de dentes obliterados”, com ênfase na técnica que utiliza a guia endodôntica. Relato de caso: Realização de tratamento endodôntico em um dente 14. Na radiografia, observou-se atresiamento acentuado da cavidade pulpar. Como houve dificuldade em localizar o canal radicular pela maneira convencional, foi indicada a técnica de guia endodôntica. Resultados: A técnica de endodontia guiada se mostrou eficaz em dentes com atresiamento significativo, permitindo o acesso à cavidade pulpar com o mínimo de desgaste dentinário, o que diminuiu o tempo e aumentou a previsibilidade do tratamento. Porém é um tratamento de custo mais elevado e apresenta dificuldade de utilização em dentes posteriores. Conclusão: A endodontia guiada já é uma realidade na endodontia atual; trata-se de uma técnica eficaz no tratamento de casos complexos.
Complicações na utilização dos piercings orais: revisão de literatura
Authors: Júlia Duarte de Oliveira  , Letícia Cristina Luiz Forte
Published: June 2024

A utilização de piercings (do inglês: perfuração) não é de hoje. Tal adorno era utilizado há milhares de anos e voltou a ser popular, principalmente entre o público jovem. Por conseguinte, o profissional e o estudante da área odontológica têm o dever de estarem aptos a instruir a população. Objetivo: Elucidar para cirurgiões[1]dentistas e pacientes questões a respeito das possíveis complicações na utilização de piercings orais. Material e métodos: A proposta de pesquisa foi um estudo observacional, retrospectivo e descritivo das complicações causadas pelo uso de piercings na mucosa oral. Foram incluídos artigos em português e em inglês, sendo eles publicados entre 2015 e 2022. As plataformas utilizadas foram: PubMed e Google Acadêmico, portanto, houve restrição na busca dos estudos. Resultados: Cerca de 413 artigos foram encontrados com temas relevantes para o estudo. Destes, selecionaram-se 15 para análise. Estudos relataram que ainda há falta de conhecimento sobre o uso de piercings orais. Conclusão: O uso de piercings orais, popular por motivos estéticos, está ligado a problemas de saúde bucal. Esta revisão destaca complicações como dor, inchaço, sangramento e infecções durante a cicatrização, além de danos crônicos a dentes, gengiva e sensibilidade dentinária. Profissionais de saúde devem diagnosticar e tratar essas complicações e orientar os pacientes sobre os riscos. Estudos futuros devem examinar os efeitos a longo prazo e estratégias preventivas. Em suma, o uso de piercings orais exige atenção em virtude das possíveis consequências negativas para a saúde bucal e geral.