bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparing some panel data estimators in the presence of autocorrelation
Authors: Ajao K. , Adenomon M.O. , Adehi M.U. 
Published: October 2023

In this work, panel data that were characterized by features of no first order autocorrelation was modelled using three estimation models: Pool Regression, Fixed Effect, Random Effect models. Panel data like other aspects of econometrics, exploits regression analysis as one of the statistical tools to formulate and illustrate models. The regression analysis requires some assumptions which, if violated, results to one problem or the other. In such case, the Pooling method of estimation remains linear, unbiased and normally distributed but might not be efficient as the estimates of the parameters might become indeterminate, the confidence intervals may be too wide and the standard errors might become large. Simulation studies were carried out at different panel structures and autocorrelation level. The experiment was repeated for 10,000 times and Root Mean Square Error (RMSE) was used to judge the performance of the models. The results from this work showed that for small sample panel structure N = 25, T = 5 and n = 5, irrespective of autocorrelation levels, fixed effect model is preferable at all level. But when moderate for N = 50, T = 10, n = 5, irrespective of autocorrelation level, random effect model is preferred, while for large panel structure for N = 450, T = 30, n = 15, irrespective of autocorrelation level, random effect model is preferred.
A statistical study of wind speed and its connectivity with relative humidity and temperature in Ughelli, Delta State, Nigeria
Authors: Siloko I.U. , Uddin O.O. 
Published: October 2023

One of the vital climatic parameters with significant roles in many natural phenomena is wind. The importance of wind cannot be overemphasized due to its role as a source of renewable energy. The understanding of wind is of great importance particularly for the purpose of prediction and management of severe weather events. However, wind as a climatic parameter depends on relative humidity and temperature as well as other weather parameters and several statistical approaches such as time series analysis, extreme value analysis and spatial analysis have been used to analyze wind speed data. This study uses the kernel density method in analyzing wind speed in Ughelli, Delta State and its connection with relative humidity and temperature using the Gaussian kernel function for a period of five consecutive years from 2018 to 2022. The performance measure employ is the asymptotic mean integrated squared error (AMISE) with the Pearson R test that measures the strength of the relationship that exists between parameters. The results of the investigation with regards to the AMISE shows that 2018 recorded best performance with wind speed and relative humidity while 2021 recorded best performance for wind speed and temperature but 2019 recorded unsatisfactory outcomes for wind speed and the two parameters. This implies that human activities that depend on these parameters for their performance did best in 2018 and 2021 respectively. Furthermore, in terms of connectivity, wind speed and relative humidity are negatively correlated in 2018 and 2022 but positively correlated in 2019, 2020 and 2021 while wind speed and temperature are negatively correlated which implies that as temperature increases, wind speed decreases.
Green synthesis of eco-friendly potassium nanoparticles and its application in <i>Amarathus viridis, Solanum lycopersocum </i>and <i>Hibiscus sabdariffa</i> plants
Authors: Aliyu Nathan D. , Wyasu Gideon , Myek Bako , Yakasai Jamila B. 
Published: October 2023

Potassium Chloride and Polyalthia longifolia leaves extract were used for the synthesis of Eco-friendly Potassium Nanoparticles for application in Amarathus viridis, Solanum lycopersocum and Hibiscus sabdariffa. The synthesized Nanoparticles were characterized by scanning electron microscopy-energy dispersive X-ray (SEM-EDX) and Fourier transform infrared (FTIR). The SEM revealed a size range of 200nm with a near spherical shape synthesized Nanoparticles. Whereas EDX revealed an elemental composition of 19% Potassium, 4.46% Chlorine, 33.04% Carbon, 28.31% Oxygen and 14.30% Iron. FTIR revealed four distinctive at 3235.3cm-1, 2109.7cm-1, 1640.0cm-1 and 1069.7cm-1 for Polyalthia longifolia potassium particles (Pl-KNPs). There were significant increase in all the folia applied Pl-KNPs when determined and compared with the controlled plants: Amaranthus viridis leaves recorded the highest increase with 56.81%, Solanum lycopersocum recorded the highest stem increase with 46.15%, while Hibiscus sabdariffa recorded the overall highest percentage with 224.27% attributed to its root length. This distinctive increase observed on the selected folia applied Pl-KNPs plants parameters is a confirmation of the significance of green synthesized potassium Nanoparticles in the field of agriculture.
The effect of alkali treatment on the mechanical properties of date seed particulates waste polypropylene filled composites
Authors: Lawal N. , Danladi A. , Dauda B. , Kogo A. , Baba M.A. , Busuguma U. 
Published: October 2023

Date seeds collected as waste were reduced to 63 µm particles and treated with NaOH (aq) at 1, 3, 5, 7 and 10 %. The extent of chemical modification was assessed using FTIR analysis. The waste polypropylene (wPP)/date seed particles (DSP) composites filled with untreated and treated particles at 20 % filler loadings were fabricated using compounding and compression moulding techniques by means of two rolls mill. Tensile, flexural, impact tests and hardness (HV) were conducted and evaluated. Subsequently, a morphological study of the fractured surface of the composites was achieved using SEM. The application of alkali treatment enhanced various properties of the composites at the optimal concentration of 10 % w/v. Specifically, the tensile strength, flexural strength, elongation at break, impact strength, and hardness were improved, resulting in values of 28.86 MPa, 140 MPa, 172.5 %, 0.92 J/m², and 23.8 Hv, respectively. While tensile and flexural moduli showed a decrease with increasing alkali concentration. The SEM of the fractured surface of the treated composite revealed a better dispersion of filler particles within the matrix with no cluster seen compared to the untreated.
Investigation of heavy metals contaminantion level in the locally cultivated rice using Atomic Absorption Spectroscopy (AAS)
Authors: Yalwa Lawan Musa , Durumin-Iya Sani Garba , Abdulhamid Abdulhamid Mikail , Uzair Muhammad , Adamu Suleiman Bashir , Shitu Ibrahim Garba 
Published: October 2023

Rice (Oryza sativa) is a stable food in many countries in the world including Africa. The present of heavy metals in the environment which are toxics affect the nutritional value of the rice. The accumulation of heavy metals in the body may lead to different health problems such as cancer, diabetes, liver and kidney failure. The study was conducted to access the presence of some selected heavy metals (Pb, Cu, Cd, As, Ni, Zn) in rice sample using atomic absorption spectroscopy technique. Five sample of rice (EXCHINA, CP, WHEETER-4, ROBBER, and YERMALINTA) which were cultivated in Damashewa village of Kirikasamma local government area were collected. Wet digestion method was used to destroy organic matter in the sample. The result of analysis showed that the concentration of Zinc( Zn) in all the four sample of rice range from (16.50-36.02mg/kg) and that of Cadmium Cd ( 0.05-0.18mg/kg) and that of copper Cu (7.02-22.20mg/kg) which is far below the safety limit of 50-100mg/kg for zinc and 0.4mg/kg for cadmium, and copper is 73.3mg/kg set up by the FAO/WHO (2001), this could lead to anaemia, renal damage, bones disorder and cancer of the lungs. While the concentration of lead Pb (3.57- 16.24mg/kg), nickel Ni (2.50-11.24mg/kg) and that of Arsenic As (0.98-4.33mg/kg) is also above the set safety limit of 0.3mg/kg for lead. Based on this research all rice sample were highly contaminated with lead, arsenic and nickel as a pollutant. Thus, the need for physical examination of the consumers and inhabitants within the study area.
Health risk assessment of heavy metals in the sources of drinking water in parts of Obubra Local Government Area of Cross River State, Nigeria
Authors: Kamgba F.A. , Okang L.O. , Abong A.A. 
Published: October 2023

This study examined health assessment of heavy metals in the sources of drinking water in parts of Obubra Local Government Area of Cross River State, Nigeria. Twenty five (25) water samples were collected with ten (10) from borehole, eight (8) from spring and seven (7) from dug-well. The samples were analysed using standard laboratory methods. The results showed that Zn had the highest chronic daily intake for infant, child and adult and Cd the highest hazard quotient in borehole, spring and dug - well water. This indicates that infant is more vulnerable to health risk followed by child and least by adult. The carcinogenic risk results of Cd and Cr contamination were greater than the permissible range of ≤1 x 10-6 to 1 x 10-4 indicating that the water sources are polluted with Cd and Cr. It was recommended that there should be awareness programmes on hygienic practices and pretreatment of water before use. Also the Cross River State Board Limited should supply quality water to the inhabitants and monitor their sources of drinking water.
Evaluación institucional de la eficiencia de un programa social de educación olímpica (Institutional evaluation of the efficiency of a social Olympic education program)
Authors: Ponciano Nuñez Pedro Danilo , Blas Fernández Juan Diego , Castro Hernández Claudio Manolo 
Published: October 2023

El uso de programas para la enseñanza de valores sociales por medio del deporte se ha ido popularizando los últimos años. Sin embargo, se ha reportado evidencia limitada sobre la programación implementada por organizaciones gubernamentales en Centro América. El propósito de nuestro estudio se centró en analizar el estado de implementación de un programa de mentoría impartido por atletas para centros educativos escolares en Guatemala. Los objetivos de la investigación se lograron mediante un enfoque cuantitativo y la participación de 70 participantes involucrados en el programa. Los resultados muestran que el programa posee un alto nivel de aceptación entre los maestros y alumnos; los atletas se transforman en modelos de rol para los estudiantes y motivación para los maestros durante el programa; el modelo de intervención está basado en sólida programación pedagógica estandarizada, adaptada al curriculum educativo nacional base. El modelo de sostenibilidad del programa es efectivo en relación costo-beneficio haciéndolo sostenible. Futura investigación deberá realizarse para medir el impacto de la programación en los estudiantes y los padres de familia involucrados en la intervención del programa.
Palabras clave: Olimpismo, Valores, Desarrollo Sostenible, Educación Olimpica, Mentoria
Abstract. The use of programs to teach social values ​​through sports has become popular in recent years. However, limited evidence has been reported on programming implemented by government organizations in Central America. The purpose of our study focused on analyzing the status of implementation of a mentoring program taught by athletes for school educational centers in Guatemala. The research objectives were achieved through a quantitative approach and the participation of 70 participants involved in the program. The results show that the program has a high level of acceptance among teachers and students; athletes become role models for students and motivation for teachers during the program; The intervention model is based on solid standardized pedagogical programming, adapted to the basic national educational curriculum. The program's sustainability model is cost-effective, making it sustainable. Future research should be conducted to measure the impact of the programming on the students and parents involved in the program intervention.
Keywords: Olympism, Values, Sustainable Development, Olympic Education, Mentoring
"Jogamos Tudo, Brincamos Todos": Estudo piloto em contexto da educação pré-escolar
Authors: Sales Inês , Antunes Raul , Gomes Sara , Marques Regina , Oliveira Ana 
Published: October 2023

A inclusão de crianças com deficiência nas escolas nem sempre é um processo fácil, tornando essencial a identificação de melhores estratégias para atingir tal objetivo. Neste estudo procurou-se analisar o efeito de um programa de intervenção, baseado em jogos motores adaptados, em crianças do pré-escolar, ao nível das atitudes de inclusão face aos pares com deficiência e na perceção de competências das crianças com deficiência. Para tal, foi elaborado um programa de 8 sessões (45 minutos cada), baseado em jogos motores adaptados. Participaram no programa 13 crianças com idades entre os 5 e 6 anos (5,31±0,48), das quais 7 eram do sexo masculino e 6 do sexo feminino. Nestas sessões as crianças, através de uma história, conheceram uma personagem que, ao longo das semanas, encontrou várias crianças com deficiência e foi tentando criar jogos que pudessem ser jogados por todas. Recorreu-se a um questionário para avaliação das dimensões “atitudes de inclusão” e “perceção de competências”, previamente utilizado por Antunes et al. (2022). A satisfação das crianças com as sessões foi avaliada seguindo as recomendações de Birch et al. (2019). Os resultados revelaram melhorias na dimensão atitudes de inclusão (p=0,002; z=-3,08) e perceção de competências (p=0,001; z=-3,18), entre os momentos pré e pós intervenção. Além disso, a satisfação das crianças com as sessões foi sempre muito evidente (≥80%). Os resultados deste estudo parecem reforçar o papel que o jogo lúdico-motor adaptado pode ter como estratégia de promoção de competências de inclusão, mesmo em idades precoces.
Palavras-chave: Atitudes de inclusão, inclusão inversa, jogos, perceção de competências, pré-escolar
EDUCAÇÃO EM SAÚDE NA ATENÇÃO PRIMÁRIA: RELATO DE EXPERIÊNCIA DE ALUNAS DA GRADUAÇÃO DE ENFERMAGEM
Authors: Cristine Carvalho Moura Karen , Lara Nunes de Souza Ester , De Almeida Barbosa Flores Fernanda , Beatriz Vilela Santos Anna , Francisco Amaral Hemilly , Denari Giuliani Carla , Luiza da Silva Gabriela , Faria Silva Fabia 
Published: October 2023

Objetivo: Evidenciar as experiências de cinco alunas de graduação em enfermagem na realização de ações educativas com a comunidade. Método: Relato descritivo reflexivo de uma experiência com atividades de educação em saúde desenvolvidas de maio a junho de 2022 em uma Unidade Básica de Saúde de Uberlândia-MG, fundamentadas nas ideias pedagógicas de Paulo Freire. Resultados: Por meio da proposta de Freire, duas atividades que contemplavam temas de relevância foram elaboradas. A primeira foi realizada com gestantes com mais de 35 semanas de gestação, introduzida com jogos de mitos e verdades, cartas ilustrativas e simulação representativa do momento do parto. A segunda dinâmica envolveu um público alvo mais diverso, com crianças, adultos e idosos, sobre doenças respiratórias em destaque regional. Conclusão: As ações criadas pelo grupo possibilitaram a promoção da educação em saúde conforme as demandas da população da região, o desenvolvimento das atividades propiciou a agregação de conhecimentos à população. Implicações para a prática: As propostas realizadas permitem a ampliação de intervenções multiprofissionais durante a permanência do paciente na unidade de saúde, mesmo fora das consultas de rotina, considerando a capacidade de desenvolver uma educação em saúde desde o primeiro contato com a Rede de Atenção.
Effect of Mobile Network Operator Facilitated Digital Credit on the Financial Health of Youth Borrowers in Kibera, Nairobi County, Kenya
Authors: Wachira Mercy Wambui , Kihara Allan 
Published: October 2023

Purpose: The increased advancements in technological integration within the financial sector has led to development of new credit platforms which improve access to borrowing among the youth. Further, with proliferation of digital lending platforms which provide unsecured loans has led to a debt chokehold among the youth. This has resulted in poor financial health among the youth. The general objective of the study was to analyze the effect of mobile network operator facilitated digital credit on the financial health of youth borrowers in Kibera, Nairobi County, Kenya.
Methodology: The study employed a correlational research design. The population of interest for this study was youth borrowers who live and work in Kibera, Nairobi County. The sampling frame for this study was active users of digital credit who are between 18 and 35 years, residing in Kibera. The list was obtained from the Independent Electoral and Boundaries Commission’s (IEBC) voter register for Kibera Ward. A stratified sampling technique was used to select the respondents. The sample size was 399 respondents. Data was collected using structured questionnaires. SPSS was used to aid in the data analysis. A descriptive statistical technique of analysis was used and shall entail the determination of the mean and frequency distribution of the datasets. Further inferential analysis was conducted using both correlation and regression analysis. The data was presented in tables and figures.
Findings: The study was able to obtain an 88 percent response rate, signifying high degree of accessibility of the youth in the area. Of these, most were male, while only 107 of the responses were from female respondents. The study established that mobile-facilitated digital credit on youth borrower’s financial health has a positive and significant effect on youth’s financial health. The study concludes that mobile network operator facilitated digital credit has a significant and positive effect on the borrower’s financial health. The study concludes that mobile operator facilitated loans are fast and easily accessible which increases their effectiveness to the user.
Unique Contribution to Theory, Policy and Practice: The study recommends that mobile money operators that provide digital loans reduce their operation rates considering they have high interest rates for the small loans they offer. The study also calls for the development of progressive peer to peer regulations that would improve the penetration of these loan devices that have been identified as key to young entrepreneurs.
<i>Kocuria rosea</i> bacteremia: two case reports and a literature review
Authors: Serefhanoglu Kivanc , Oklu Emine 
Published: October 2023

IntroductionKocuria rosea (K. rosea) is a gram-positive, aerobic, coagulase-negative coccoid that is generally considered as a non-pathogenic commensal. Infection from K. rosea is rare, and only limited number of case reports have been described. We aimed to investigate the clinical course and outcome of bacteremia caused by Kocuria rosea.Material and methodsWe reviewed and analyzed two cases of K. rosea bacteremia occurred at Istanbul Florence Nightingale Hospital and cases of this infection in published reports. The National Library of Medicine MEDLINE database was queried using the key terms “kocuria rosea, and kocuria rosea bacteremia" to identify published cases of K. rosea bacteremia.ResultsIn addition to our two cases, three cases of K. rosea bacteremia have been reported in the literature. The two infections occurred in our instutition were ICU-acquired. The first patient was that of a 89-year-old man, who was admitted to the ICU due to respiratory distress and pulmonary edema. The second patient was 64-year-old women with chronic renal failure, who was admitted to the ICU due to respiratory failure and hemodynamic instability. All five patients had succesful outcome.ConclusionsAlthough bacteremia due to K. rosea remains rare, and the organism is generally considered to be nonpathogen, it should be considered pathogen in both nosocomial and community acquired infections.
RESEARCH OF STREAMS OF FIBROUS WEIGHT IN PLATE OF ROTOR REFINER
Authors: Вихарев С.Н. 
Published: October 2023

В статье приведены результаты исследования потоков волокнистой массы в гарнитуре мельниц при помощи моделирования в программной среде Ansys Fluent. Гидродинамика потоков волокнистой массы в мельнице описывается уравнениями Навье – Стокса. Разработаны модели потоков в гарнитуре ротора. Исследования потоков проведены при следующих переменных факторах: частоты вращения ротора, расхода волокнистой массы, углов наклона ножей и разницы давления между входом и выходом межножевой канавки. При увеличении часто- ты вращения с 600 до 1 000 мин–1 расход в канавках ротора увеличивается в 2,3–5,4 раза. При увеличении разницы давления между выходом и входом канавки с 60 до 135 кПа расход в канавках ротора уменьшается в 1,4–1,5 раза. Поток в межножевых канавках ротора направлен от центра к периферии гарнитуры. Среднее значение скорости потока в межножевой канавке ротора по длине канавки при увеличении частоты вращения ротора с 600 до 1 000 мин–1 возрастает в 2,4–2,6 раза. При угле наклона 20° по направлению вращения ротора скорость потоков увеличивается в 1,2 раза. При угле наклона 20° против направления вращения ротора скорость потоков уменьшается в 1,1 раза.
In researches of streams of ﬁ brous weight in plate of reﬁ ners are lead by means of modeling in program Ansys Fluent environment. The hydrodynamics of streams of ﬁ brous weight in reﬁ ner is described by equations Navier-Stokes. Models of streams in plate of rotor are developed. Researches of streams it is lead at the following variable factors: frequencies of rotation of rotor, the charge of ﬁ brous pulp, corners of an inclination of knifes and differences of pressure between an input and an output bar ﬂ utes. At increase in frequency of rotation with 600 up to 1000 min–1 the charge in ﬂ utes of rotor increases in 2,3–5,4 times. At increase in a difference of pressure between an output and an input of ﬂ ute with 60 up to 135 kPa the charge in ﬂ utes of rotor decreases in 1,4–1,5 times. The stream in bar ﬂ utes of rotor is directed from the center to periphery plates. Average value of speed of stream in bar to ﬂ ute of rotor on length of ﬂ ute at increase in frequency of rotation of rotor with 600 up to 1 000 min–1 grows in 2,4–2,6 times. At a corner of an inclination of 20 degrees on direction of rotation of rotor speed of streams increases in 1.2 times. At corner of an inclination of 20 degrees against a direction of rotation of rotor speed of streams decreases in 1,1 times.
Volatile organic compound fluxes in the agricultural San Joaquin Valley – spatial distribution, source attribution, and inventory comparison
Authors: Pfannerstill Eva Y. , Arata Caleb , Zhu Qindan , Schulze Benjamin C. , Woods Roy , Seinfeld John H. , Bucholtz Anthony , Cohen Ronald C. , Goldstein Allen H. 
Published: October 2023

Abstract. The San Joaquin Valley is an agricultural region in California that suffers from poor air quality. Since traffic emissions are decreasing, other sources of volatile organic compounds (VOCs) are gaining importance in the formation of secondary air pollutants. Using airborne eddy covariance, we conducted direct, spatially resolved flux observations of a wide range of VOCs in the San Joaquin Valley during June 2021 at 23–36 ∘C. Through land-cover-informed footprint disaggregation, we were able to attribute emissions to sources and identify tracers for distinct source types. VOC mass fluxes were dominated by alcohols, mainly from dairy farms, while oak isoprene and citrus monoterpenes were important sources of reactivity. Comparisons with two commonly used inventories showed that isoprene emissions in the croplands were overestimated, while dairy and highway VOC emissions were generally underestimated in the inventories, and important citrus and biofuel VOC point sources were missing from the inventories. This study thus presents unprecedented insights into the VOC sources in an intensive agricultural region and provides much needed information for the improvement of inventories, air quality predictions, and regulations.