bluuebunny/crossref_metadata_2025 huggingface dataset:
Geotechnical investigation of the sub-soils condition around Yelwa North central part of Nigeria For the construction of infrastructures
Authors: Vincent E. , Mallo S.J.
Published: May 2023

Investigation of the geotechnical conditions of the Sub-soils around Yelwa North Central part of Nigeria was carried out in order to know the possible  causes of the infrastructural failures in the area. The investigation involves in-situ collection of the disturbed and undisturbed soil samples and were  analysed in the laboratory based on British Standard (BS) method for soil testing for civil engineers. Results of the study reveals that; The Atterberg limit  (Liquid limit ranged from 33.0% to 43.0%, Plastic limits from 16.23% to 26.37%, Linear shrinkage from 7.86% to 15.71%, Plasticity index from 7.63% to  24.77%). The Sieve analysis shows that; the percentage passing of the soil samples ranges from 31.62% to 67.60% which indicates poor materials. The  Direct shear test revealed that the cohesive strength (c) ranges from 13 kN/m2 to 24 kN/m2 , angle of internal friction (ø)° from 12° to 16° and unit weight  (ϒ) from 18.17 kN/m3 to 20.87 kN/m3 . From the Consolidation test; the Total settlement (Pc) ranges from 0.0008 m to 0.013 m, Coefficient of  Consolidation (Cv) from 87.657 m2 /yr to 109.325 m2 /yr and Volume Compressibility (Mv) from 0.0048 kN/m2 to 0.0205 kN/m2 . The Soil pH ranges from  6.4 to 7.4, Specific gravity (SG) from 2.57 to 2.73, and Natural Moisture Content (NMC) from 8.48% to 25.77%. The Compaction test revealed that; the  Optimum Moisture Content (OMC) ranged from 13.22% to 20.60%, Maximum Dry Density (MDD) from 1.59 g/cm3 to 1.88 g/cm3 which shows that the soil  are mostly of silty-clay material and Un-soaked value of California Bearing Ratio (CBR) ranges from 50.88% to 96.51%. The findings have revealed that, the  sub-soil is characteristically fair to poor, and this required a form of geotechnics. Information acquired from the findings are expected to serve as  guide in the choice of design and construction and as a baseline subsurface soil compendium for the construction of infrastructure in the study area and  for further studies.
Effect of feldspar and silica variation on the properties of dental porcelain
Authors: Okoubulu A.B. , Mgbemere H.E. , Obidiegwu E.O. , Nwaeju C.C.
Published: May 2023

Dental porcelain was produced by mixing feldspar, silica, kaolin and bone ash by varying the contents of feldspar and silica. The processing steps include  milling, sieving, pressing/shaping, drying, and sintering while the characterisation techniques were Hardness, Compressive strength, X-ray diffraction,  Scanning electron microscopy and Fourier Transform Infrared (FTIR). The mixture was subjected to temperatures of 1100 and 1200 oC in a sintering  furnace. The chemical composition was determined using X-ray fluorescence and they confirm that SiO2 and Al2O3 are the two major constituents in  feldspar and kaolin while CaO is the major constituent in bone ash. For samples sintered at 1200oC, the X-ray diffraction showed that some glass phase possibly consisting of hedenbergite, ilmenite and silica were formed while crystalline phases namely microcline and sanidine were obtained for samples  sintered at 1100°C. The morphology of the grains revealed that samples sintered at 1200oC had some hexagonal silica crystals while flakes of different  sizes were obtained for samples sintered at 1100oC. Hardness values between 262 and 536 BHN, compressive modulus values ranging from 219 MPa to  324 MPa and linear shrinkage values between 6.34 and 7.6% were obtained. The batches of different compositions with ranges: quartz (silica) (15-25%),  feldspar (70-80%), kaolin (Edda/Bauchi) (4%) and bone ash (1%) were fired at 1100, 1200oC, and the developed properties were tested. The sample with 70  wt.% of feldspar, 25 wt.% silica, 4 wt.% of Bauchi clay, and 1 wt.% bone ash sintered at 1200oC gave the best properties and has the potential to be  used in dental restoration.
An innovative pedagogical simulation and animation of a shovel-truck system
Authors: Agyei G. , Kateng E.A.
Published: May 2023

This paper aims to simulate and animate a shovel-truck system in an open pit mine using Arena® Software for teaching and learning purposes. The  shovel-truck system is the use of loading and dumping units in the transportation of materials. The shovel-truck system has wide application in open pit  mining. Animation of a shovel-truck system in Arena® is a reflection of the logic defined by the module’s flowcharts. Arena® software is a widely used  simulation software based on Discrete Events. The data were analysed by an input analyser tool in Arena® software to get distributions and expressions  for the shovel-truck system. The shovel-truck system was then modelled in the software. The developed animated model depicts the exact activities in  open pit mines.
Effects of homogenous-heterogeneous reactions on stagnation point of aligned MHD Casson nanofluid over a melting surface
Authors: Akaje T.W. , Olajuwon B.I. , Raji M.T.
Published: May 2023

This study examines how melting heat transfer affects the MHD Casson nanofluid's stagnation point when there are both homogeneous and  heterogeneous chemical reactions occurring along with viscous dissipation. Additionally taken into account in this study are the effects of  thermophoresis and Brownian motion. The linked non-linear partial differential equations that control nanofluid flow can be reduced to couple non-linear  ordinary differential equations using local similarity variables, which can then be numerically solved using the Spectral Collocation technique, as  demonstrated in the current flow mathematical modeling. Both qualitative and quantitative data are presented to show how flow control settings affect  fluid flow, temperature, and nanoparticle concentration. The comparison of the current results with previously published works revealed good  agreement, as shown in table 1.
Effect of sunlight on three stratifications of waste water from a waste stabilization pond
Authors: Ohazulike O.B. , Ademiluyi J.O.
Published: May 2023

Experimental studies on stratification were conducted on a waste stabilization pond system at the University of Nigeria, Nsukka, Nigeria. This was done  to ascertain the effect of stratification due to sunlight on pond parameters. An experimental approach was adopted which involved pouring wastewater  into a glass column apparatus and exposing to sunlight for 7, 14, and 21 days. The statues of 16 physicochemical and microbiological parameters were  investigated in the three strata under consideration. Analysis of the samples collected at depths A, B and C, 30cm apart, starting from the top indicated  different values of temperature, pH, and nutrients. Maximum values of temperature (32.9 0C), pH (7.9), turbidity (3.46 NTU), and iron (1.86 mg/l), were  recorded at the top layer; while the concentration of conductivity (906 μS/cm), total dissolved solids (589 mg/l), BOD5 (400mg/l), ammonia (290 mg/l),  total coliform (126,000 cfu/100ml), and E. Coli (99,000 cfu/100ml) were highest at bottom layer. Conductivity, total dissolved solids, turbidity, iron,  phosphorus and nitrates fell within World Health Organization (WHO) guidelines. A combination of sunlight with high pH and oxygen concentrations is needed for sunlight to have very significant effects. It is recommended that WSPs be designed with the consideration given to pond dimensions that will  provide a wider surface area for sufficient sunlight and oxygen to be acquired.
Evaluation of Image Enhancement Techniques for Electrical Capacitance Tomography Applications
Authors: Mwambela Alfred J
Published: May 2023

The fast generation of images in Electrical Capacitance Tomography (ECT) systems is a desirable feature for many industrial applications. Non-iterative reconstruction algorithms which qualify for this requirement generate poor-quality images. The Linear Back Projection (LBP) is the fastest non-iterative reconstruction algorithm. The challenge is to find a technique to improve the quality of images from LBP at a low computational cost. Image enhancement techniques have been investigated for improving the quality of images reconstructed from the LBP algorithm. Simulated and measured static and dynamic flow data were used in the evaluation. The performance results were benchmarked with results from the Projected Land Weber (PLW) one of the accurate iterative reconstruction algorithms. The Gompertz enhancement algorithm was found to have 3.5 times more computation cost than the LBP reconstruction algorithm and the accuracy of the iterative PLW reconstruction algorithm. This is noteworthy since the algorithm does achieve a good balance between accuracy and speed. The fact that the accuracy gained satisfies the reservoir management standards in the multiphase hydrocarbon production sector is significant in this regard.

Keywords:    Electrical Capacitance tomography, Multiphase flow imaging, Maximum entropy thresholding, Gompertz distribution, Image enhancement
Effects of Vacuum Packaging and Chilling Storage on the Microbiological Changes of the Superheated Steam Dried Sardines
Authors: Antelm Prissillah , Juma Ibrahim , Rweyemamu Leonard M.P. , Kaale Lillian Daniel
Published: May 2023

Fish are important sources of protein and micronutrients for combating malnutrition. Since fish are highly perishable, methods for processing and preserving them should be the main focus to increase their shelf life and maintain their quality. The present study assessed the effectiveness of the superheated steam dryer (SSD) in processing sardines, and examined the effects of packaging and storage conditions on their microbiological quality. Sardines collected from the Mafia Island were dried in SSD, air-packed and stored at room temperature (AR), air-packed and stored at chilling temperature (AC), vacuum-packed and stored at room temperature (VR), and vacuum-packed and stored at chilling temperature (VC) for 49 days. Following drying, the total viable bacterial counts (TVBC) and total yeast and mould counts (TYMC) both decreased from the initial values of 9.14 (TVBC) and 2 (TYMC) log CFU/g in the fresh samples to 0.00 log CFU/g. The AR samples had the highest microbial growths during storage (7.48 (TVBC) and 2.82 (TYMC) log CFU/g), whereas the VC samples had the lowest (1.79 (TVBC) and 1.42 (TYMC) log CFU/g). The AR treatment was rejected within 21 days, whereas the AC, VR, and VC treatments prolonged the sardines’ shelf life throughout the storage time.

Keywords: Superheated steam dryer, sardine, microbial analysis, vacuum packaging, chilling storage
Geo-Statistical Analysis of Meteorological Drought and Recurrence Intervals in the Context of Climate Change Over Extreme Northeastern Region of Nigeria
Authors: Abaje Iliya B.
Published: May 2023

This study examined the occurrence of meteorological drought in the context of climate change over the extreme northeastern region of Nigeria using rainfall and temperature data spanning a period of 60 years (1961-2020) and 40 years (1981-2020), respectively. Linear regression, 5-year moving average and Cramer’s test were used to examine the changes in the rainfall and temperature. Rainfall Anomaly Index was used in depicting periods of different drought intensities in the region. The trend analysis of the climate data revealed that the region has been experiencing increasing rainfall and temperature in recent years. Findings also revealed that the droughts of the 1980s were more severe than the Great Sahelian Droughts of 1968-1973. The year 1987 was the driest in the whole period of study (1961–2020). Contrariwise, about 81% of the region from 2000 to 2020 experienced normal to very wet conditions. The mean probabilities of mild, moderate, and severe droughts in the area were 0.14 (recurrence interval of 8 years), 0.11 (recurrence interval of 11 years), and 0.07 (recurrence interval of 16 years), respectively. This study concludes that the number of drought occurrences has decreased in recent years. Therefore, government policies related to agriculture and water resources development in the area should take into account the increasing rainfall and temperature in recent years.

Keywords: Climate Change, Meteorological drought, Rainfall, Recurrence Interval, Severe Drought, Temperature
Predictors of Attrition from Care and Treatment Centres among HIV-positive Pregnant and Breastfeeding Adult Women in Dar es Salaam, Tanzania
Authors: Elias Felix , Nyimvua Shaban  , Rutalebwa Edwin
Published: May 2023

In Tanzania, poor retention rates among pregnant and breastfeeding mothers continue to be a problem, contributing to a mother-to-child HIV transmission rate of 11% in 2019, compared to a global target of 5%. The goal of this study was to determine the influence of retention on clinical outcomes and identifying predictors of attrition among HIV-positive pregnant and breastfeeding women from follow-up care in Dar es Salaam. A retrospective cohort study included HIV-positive women who engaged in PMTCT services in public and private health facilities between January 2016 and December 2019. Secondary data were extracted from databases used for routine follow-up in care and treatment clinics (CTCs). The estimates of cumulative incidences of poor retention from date of enrollment or ART initiation were assessed using Kaplan–Meier method. The Cox regression model was used to identify the predictors of attrition. Among 20,225 HIV-infected pregnant and lactating women enrolled in PMTCT services, 93.35%, 89.07%, and 85.24% were classified as retained in care at 12, 24, and 36 months, respectively. The attrition rate at the end of the follow-up period was 15.82%, and WHO clinical stages 3 or 4 (aHR = 1.67, 95% CI: 1.46–1.89; p-value < 0.001) and unsuppressed viral load (aHR = 3.79, 95% CI: 3.20–4.49; p-value < 0.001) were predictors of increased risks of attrition. The maternal age group 25–34 years (aHR = 0.24, 95% CI: 0.18–0.32; p-value < 0.001), being married or cohabiting (aHR = 0.45, 95% CI: 0.38–0.55; p-value < 0.001), an efavirenz (EFV)-based regimen (aHR = 0.26, 95% CI: 0.19–0.35; p-value < 0.001), and good adherence to ART (aHR = 0.61, 95% CI: 0.48–0.79; p-value < 0.001) were factors associated with reduced risks of attrition. The study shows that a strong tracking system for lost to follow-up (LTFU), that is, patients who miss appointments to the same health facility for more than 3 months after the last scheduled clinical visit, should be prioritised for successive PMTCT programmes for better clinical outcomes.

Keywords:  Retention, Attrition, Treatment, Clinics, Loss-to-follow up
Adsorption of Water Vapour on the Microstructure and Stability of Cu-Zn Bimetallic Coordination Polymer
Authors: Oguntade Bukunola K. , Watkins Gareth M.
Published: May 2023

A current challenge in the design of synthesis lies in the incorporation of two or more transition metals into a coordination polymer. The most widely used approach has been to incorporate a second metal as a generally innocent (coordinatively saturated) part of a linear linker as in the case of multifunctional carboxylated porphyrins (MCPs). The empirical method has been used to obtain many other types of MCPs; however, the selective, direct replacement of one transition metal within a monometallic coordination polymer via controlled stoichiometry has not generally led to maintained structural fidelity. In this present work, three pyromellitic acid complexes were synthesized at room temperature and characterized by Elemental analysis, Powder X-ray diffraction, Fourier transform infrared spectroscopy, Scanning electron microscopy, N2 adsorption-desorption Isotherm, and Thermal analysis. The reaction in water-methanol between pyromellitic acid and copper ions by ambient precipitation method formed [CuH2B4C]·5H2O. When zinc is combined with copper and the ligand, [Cu2Zn(B4C)1.5(H2O)4.5]·9H2O is formed. A repeat of this step under solvothermal condition produced Solvo-[Cu2Zn(B4C)1.5(H2O)5]·2H2O. The N2-adsorption isotherm of these compounds showed them to be Type III according to the IUPAC classification, with small pores only capable of small molecule sorption.

Keywords:  Coordination, microporous, polymer, pyromellitic, sorption
Semi-Analytic Approach to Solving Rosenau-Hyman and Korteweg-De Vries Equations Using Integral Transform
Authors: Loyinmi Adedapo Chis , Idowu Kabir Oluwatobi
Published: May 2023

In this research, we proposed the fusing of Elzaki transform and projected differential transform (PDTM) to obtain an analytical or approximate solution of the Rosenau-Hyman and Korteweg-de Vries equations which respectively govern pattern formation in liquid drops and model of waves on shallow water surfaces. The results obtained presented in tables and graphs showed better efficiency, accuracy, and convergence of the method to handle Rosenau-Hyman and Korteweg-de Vries equations when compared to other methods in the literature.

Keywords:          Rosenau-Hyman Equation; Korteweg-de Vries equation; Elzaki Projected differential transform method; Semi-analytic approach
A Cloud Based Model Symbiotic Organism Search Algorithm for Placement of Distributed Energy Resources in the Electrical Secondary Distribution Networks
Authors: Kawambwa Shamte , Mnyanghwalo Daudi
Published: May 2023

The increased penetration of distributed energy resources (DERs) technologies to residential users has fostered the need for DERs integration and control methods in the secondary distribution networks (SDN). In order to reap the potential advantages of DERs and achieve their inclusion in the electrical power system while avoiding their negative impacts, the DERs should be optimally placed and sized. Considering the nature of electrical networks and DER operations, the DERs placement is a nondeterministic polynomial hard (NP-hard) optimization problem. Metaheuristic algorithms are efficient for solving DER placement problems. Metaheuristic algorithms for DER placement in SDN involve high computational effort, theoretical convergence assumptions that cannot be satisfied in the real world and dependence on parameter settings. Therefore, this study proposes a DER placement algorithm that employs a cloud-based model symbiotic organism search algorithm (CMSOS). The CMSOS is attributed to simple implementation and computation, good convergence, and parameter independence. The electrical network segment taken for Tanzania’s electrical distribution network was used for testing the algorithms, considering power loss and voltage deviations. Results show that using DERs in the proposed locations reduces power loss by 89.3%. The convergence profile shows that the proposed CMSOS-based algorithm converges faster than the conventional symbiotic organism search algorithm (SOS).

Keywords:    Metaheuristic Algorithms, Symbiotic Organism Search, DER Placements, Radial Distribution Network, Cloud-based model
More resourceful scavenging by opportunistic Hooded Vultures Necrosyrtes monachus in coastal Gambia with photographic proof of tongue use when foraging for live food and blood.
Authors: Barlow Clive R. , Cryer Russell , Mendy Francis , Dobbs Geoff E.
Published: May 2023

We report on a combination of new and infrequently documented feeding behaviours for the Critically Endangered and opportunistic Hooded Vulture Necrosyrtes monachus. Observations were recorded in the Western Region of coastal Gambia from 2015 to 2020, where Hooded Vultures are living in high densities. We provide photographs and video footage to demonstrate the use of the grooved tongue for consuming live food items and when drinking blood. Attraction of large groups of Hooded Vultures to freshwater is also described.
A History of Violence
Authors: Ziegner Kai
Published: May 2023

The focus of this narrative-analytical text-photo-montage is the so-called Wendezeit in East Germany, the years after the reunification and the individual and collective outbreaks of violence that accompanied thisradical change. Based on personal experiences and trained on literary and theoretical works such as Alexander Kluge’s "Lebensläufe", Klaus Theweleit’s "Männerphantasien" or W.G. Sebald’s novel "Austerlitz", Kai Ziegner reflects on remembrance and testimony in a way that is as critical as it is experimental. Where and how do authoritarian regimes and structures persist across generations? What scars can be read on the fault lines of disruptive processes and how to deal with—not only historical—situations in which the protagonists are victims and perpetrators at the same time? Ziegner’s artistic research shows how the unpresentable can become visible, how the ambiguous can be told and how a differentiated processing can be made possible.
Saling Menghormati di dalam Kasih Kristus
Authors: Hetharie Yosa Marianta
Published: May 2023

Tulisan ini menawarkan sebuah pembacaan feminis terhadap teks Efesus 5: 22-33 yang berfokus pada pemahaman kembali kata-kata “tunduklah” dan “kepala”. Persoalannya adalah kedua kata tersebut seringkali dipergunakan sebagai alasan untuk melakukan pembenaran terhadap tindakan subordinasi bahkan kekerasan terhadap perempuan. Metode yang digunakan adalah hermeneutika feminis Elisabeth Schüssler Fiorenza, khususnya model hermeneutik kecurigaan. Upaya reinterpretasi menggunakan model hermeneutik tersebut bertujuan untuk menginvestigasi secara lebih mendalam penggunaan kata tersebut dalam teks dan konteks penulisannya. Hasil yang saya tawarkan adalah pemahaman yang tidak lagi menyudutkan perempuan, bahkan melanggengkan berbagai bentuk kekerasan terhadap perempuan
Dalihan na tolu sebagai teologi lokal:
Authors: Sihombing Jhon Ferdinand , Silooy Claudie Valda
Published: May 2023

Tulisan ini bertujuan untuk mempercakapkan dalihan na tolu dalam Batak Toba dan Lukas 16: 19-31 dengan perspektif Robert J. Schreiter tentang teologi lokal. Kajian awal terhadap dalihan na tolu telah memunculkan fakta bahwa terdapat perbedaan seseorang dengan yang lain karena status hula-hula, dongan tubu atau boru, dan ketidaksetaraan gender. Hula-hula akan menjadi orang yang sangat dihormati dalam sebuha adat, dongan tubu sebagai sahabat dari orang yang mengadakan adat, sedangkan boru adalah pekerja dalam adat tersebut. Dalam hal ini, hula-hula menjadi pihak yang sangat diuntungkan dibandingkan dengan boru. Penentuan posisi seseorang selalu merujuk kepada marga laki-laki, sehingga perempuan harus mengikut marga suaminya. Dalam mengkaji tulisan ini, penulis akan menggunakan metode kualitatif yaitu upaya kontekstualisasi berbasis teologi Robert J. Schreiter tentang teologi lokal dengan kajian pustaka. Kajian ini menemukan bahwa dalihan na tolu menjunjung tinggi nilai kekerabatan yang sangat tinggi, demikian juga Lukas 16: 19-31 yang menekankan kepedulian terdapan orang lain. Berdasakan kajian ini, penulis menyimpulkan bahwa dalihan na tolu adalah sebuah teologi lokal yang sangat penting untuk dipertahankan.
In-School but Struggling for Success: Examining the Main Barriers to Learning for All in Caribbean Schools
Authors: Knight Verna
Published: May 2023

In today’s 21st century educational era, we have learnt that educational access cannot be assumed to mean educational success for every child. In many classrooms across developing countries, one third of the students are physically present but disengaged from learning. They are in school but achieving no greater academic success than the child who is out of school (Center for Global Development, 2013). The question of who they are, and why they are failing, is an important one that has been drawing the attention of governments, education policy makers, and education development partners in recent years; especially given ever-widening international efforts towards fulfilling conditions to facilitate the right to an education for all children. Being able to early identify students at risk to failure, and to determine the causes of their non-success, are critical to national efforts to both develop and direct appropriate interventions and support to remove the barriers preventing children from learning. This paper utilizes data from a larger mixed method study of Out of School Children (OOSC) in the eastern Caribbean region to examine the most prevalent issues which inhibit student success, in an effort to support advocacy towards strengthening systems of supports in schools to increase the chances of success for all.
Why Do Cubans Choose Teaching? Exploring Motivations and Perceptions of Trainee Teachers in Cuba
Authors: King Martina
Published: May 2023

The objectives of this study, which used a quantitative non-experimental design, were to investigate teaching motivations and career perceptions as well as motivational problems of Cuban trainee teachers across two universities in Havana and Camagüey. Participants (N = 340) completed the Factors Influencing Teaching (FIT)-Choice scale which was extended and culturally adapted to the Cuban context. The study used a non-probability convenience sampling method in which participants were chosen based on their availability in lectures. The main motivations for choosing teaching as a career were: (i) making a contribution to society; (ii) shaping the future of children/adolescents; and (iii) prior teaching and learning experiences. Moreover, Cuban trainee teachers generally perceived teaching as a career that is high in demand and low in return in terms of salary and social status. Some motivational problems were also identified: for example, foreign language education students were found to be less intrinsically motivated, and indicated less intention to remain in the teaching profession. Based on the results, suggestions for recruiting and maintaining qualified trainee teachers are provided to overcome teacher shortage in Cuba.
The Differences in Summative Academic Achievement between African American and African Caribbean Students: A Meta-Analysis
Authors: Thomas Amanda
Published: May 2023

Meta-analysis techniques were utilized to examine the differences in summative academic achievement among African American and African Caribbean students. A fixed effects model with moderator analyses was applied to a sample of five studies. Significant between group heterogeneity was identified. The aggregate effect size of -1.08 for differences in academic achievement between both groups was statistically significant. The type of summative assessment emerged as a substantial moderator which explained 86% of the heterogeneity between both groups. Implications are discussed, along with recommendations for updating the psychometric properties of culturally relevant and culturally sustaining assessments to improve the educational experiences of African American and African Caribbean students.
Residência Pedagógica, subprojeto Geografia, da Unimontes e a promoção da formação docente
Authors: dos Santos Maria Ines Fernandes , Pereira dos Santos Dulce , Alves Rahyan de Carvalho
Published: May 2023

O presente trabalho buscou investigar a contribuição do Programa Residência Pedagógica (PRP), subprojeto Geografia do Campus Montes Claros da Unimontes, para a formação de novos docentes. Como metodologia utilizou-se: revisão bibliográfica e aplicação de questionários aos sujeitos da pesquisa no ano de 2022. O programa fomenta o tripé: ensino, pesquisa e extensão e colabora para a formação da identidade docente.
Prensa sindical y construcción política. Los ferroviarios comunistas del Central Argentino (Rosario y Pérez durante los años 20)
Authors: Badaloni Laura
Published: May 2023

El presente artículo explora la militancia comunista en el ámbito ferroviario a partir de las transformaciones laborales, las experiencias de lucha y la organización sindical y partidaria. Para ello, se recurre a un análisis situado y relacional centrado en una compañía –el Ferrocarril Central Argentino (FCCA)– en Rosario y Pérez. Se examina particularmente un periódico de empresa comunista, El Riel, que circuló en esa compañía a fines de los años 20. El abordaje de esta publicación contribuye a un acercamiento al proceso de formación de una comunidad obrera ferroviaria local y aporta al estudio de la prensa obrera en el período analizado.
Cuando la “liberación” quiso viajar en colectivo. Proyectos, facciones y disputas en una seccional de la Unión Tranviarios Automotor, Mar del Plata, 1970-1976
Authors: Ladeuix Juan Iván
Published: May 2023

Este trabajo analiza la experiencia de los trabajadores de la seccional marplatense de la Unión Tranviarios Automotor, el sindicato único de los conductores de ómnibus y subterráneos, en el contexto particular de la primera mitad de la década del 70, signado por la radicalización y la alta conflictividad sindical y política. En dicha seccional se cristalizaron posiciones faccionales que no sólo respondían a posicionamientos divergentes en relación al accionar sindical, sino que reflejaban líneas de fracturas en torno a una concepción política y social sobre el futuro del país. A partir de un conjunto variado de periódicos locales, sindicales y políticos, reconstruimos la dinámica y las formas del conflicto en dicho sindicato así como la consolidación de un actor propenso a la conciliación con el sector empresarial.
Composición de clase e historia interna de los dirigentes sindicales chilenos de los años 60. Notas sobre una encuesta obrera de 1963
Authors: Thielemann Hernández Luis
Published: May 2023

A partir del análisis de los resultados de una encuesta realizada a la mayoría de los dirigentes sindicales de las grandes ciudades de Chile (Concepción, Santiago y Valparaíso) en 1963, se hace un ejercicio de proyección, tanto de la historia interna como de la composición de clase del movimiento obrero de la primera mitad de la década de 1960. El estudio da cuenta de un movimiento obrero de fuertes y ásperas nociones sobre las diferencias de clases, crítico de la política y que concibe su enemistad con el patrón a un nivel fundamental, desde lo específico a lo general, de forma normalizada y razonada. Así, se discute y complejiza la imagen del movimiento obrero del período y predominante en cierta historia social, destacando su particular clasismo y politización.
David Harvey, The Anti-Capitalist Chronicles (2020)
Authors: López Fernández Daniel
Published: May 2023

Reseña de David Harvey, The Anti-Capitalist Chronicles, Londres, Pluto Press, 2020, 220 pgs.
A ESTIMULAÇÃO DA LEITURA EM ALUNOS COM DIVERSIDADE FUNCIONAL NO CONTEXTO DA BIBLIOTECA ESCOLAR: UM ESTUDO DE CASO
Authors: Oliveira António
Published: May 2023

A leitura é um dos requisitos fundamentais para o sucesso educativo e a inclusão de qualquer indivíduo na sua sociedade de referência. O conceito de biblioteca escolar inclusiva veio reforçar a necessidade de estabelecer as condições de acesso à informação de alunos com diversidade funcional. Esta investigação teve como objetivo principal compreender a forma como a biblioteca de uma escola do concelho do Fundão, objeto do nosso estudo, desenvolve atividades que contribuem para a estimulação de competências de leitura nestes alunos. No estudo empírico, adotamos uma metodologia qualitativa, com características de estudo de caso, do tipo exploratório, no qual utilizamos como métodos de recolha de dados: a entrevista semiestruturada, a observação direta e a análise documental. Os resultados obtidos na investigação empírica permitem-nos concluir que a biblioteca escolar analisada, não desenvolve especificamente a estimulação de competências de leitura em alunos com diversidade funcional, no contexto da frequência deste espaço educativo, apesar dos bons recursos humanos e materiais de que dispõe. Por outro lado, não existem níveis formais de colaboração entre o coordenador da biblioteca escolar e os professores de Educação Especial, no sentido de serem desenvolvidas atividades específicas de leitura para estes alunos. Consideramos que o nosso estudo pode ser um contributo útil, no sentido de suscitar uma reflexão na comunidade educativa sobre a importância das bibliotecas escolares no processo de inclusão educativa e social dos alunos com dificuldades persistentes na aquisição da leitura.
DESENVOLVIMENTO DE UMA METODOLOGIA DE ANÁLISE ESPACIAL PARA DEFINIÇÃO DA ESTRUTURA ECOLÓGICA MUNICIPAL DE NISA
Authors: Cabaceira Suzete , Fernandez Paulo , Quinta-Nova Luís
Published: May 2023

A Estrutura Ecológica (EE) é uma figura de ordenamento do território integrada na legislação portuguesa pelo Decreto-Lei n.º 380/99; no entanto foi sempre muito vaga no seu conceito, com uma definição pouco clara que deu origem a diversas interpretações. Esta estrutura visa a sustentabilidade ecológica da paisagem e tem que ser delimitada a todas as escalas do planeamento. À escala local, a Estrutura Ecológica Municipal (EEM) representa uma figura de planeamento ambiental integrada no Plano Diretor Municipal (PDM), cuja implantação se revela fundamental para a concretização dos pressupostos de desenvolvimento sustentável e para a melhoria da qualidade de vida das populações. Este estudo tem como objetivo desenvolver uma metodologia de análise espacial para definição da Estrutura Ecológica Municipal de Nisa. Através de uma metodologia desenvolvida em plataforma de Sistemas de Informação Geográfica (SIG), identificam-se e analisam-se as componentes físicas e biológicas dos ecossistemas presentes no território municipal. Depois de concluída a interpretação do território, e com base nesta, delimita-se a EEM de Nisa e são atribuídos graus de proteção aos valores naturais e seminaturais em presença, numa perspetiva de preservar as zonas mais sensíveis da paisagem, que contribuem para a preservação e promoção da biodiversidade e para a valorização ambiental.
THE RELEVANCE OF CLINICAL PATHOLOGY LABORATORIES IN THE MANAGEMENT OF ACUTE MYOCARDIAL INFARCTION: A REVIEW
Authors: Roque Claudio , Lopo Tânia
Published: May 2023

Acute myocardial infarction (AMI) impairs the myocardium ability to pump blood. If this condition is not reversed in time, it will compromise the entire cardiovascular system, which in turn can lead to the collapse of all other physiological systems. Therefore, for the rapid and correct management of this condition the role played by the clinical pathology laboratory (CPL) is crucial due to its rapid response in the quantification of cardiac biomarkers. Through the measurements realized in CPL, it is possible to not only diagnose myocardial injury but also evaluate the injury size, establish a prognostic, or estimate the risk of re-infarction. Currently, the data provided by CPL to the clinician is increasingly accurate and robust, which is only possible due to the evolution that has been made in this field during the last three decades. Therefore, the major objective of this review is to emphasize the relevance that CPL has in the management of AMI patients.
(IN)FORMAÇÃO SOBRE PICTOGRAMAS DE SUBSTÂNCIAS PERIGOSAS: (RE)CONHECER IMPACTES NO AMBIENTE E NA SAÚDE
Authors: Monteiro Silvia , Heleno Lizete , Sebastião Fernando , Ispolnov Kirill , Santos Olga
Published: May 2023

Considerando que o conhecimento dos pictogramas de substâncias perigosas é fundamental para promover atitudes que minimizem impactes no ambiente e na saúde, foi levado a cabo o trabalho que aqui se apresenta, alicerçado nos seguintes objetivos: i) avaliar o nível de perceção dos estudantes de Cursos Técnicos Superiores Profissionais de uma instituição do ensino superior sobre os pictogramas de substâncias perigosas, definidos pelo GHS, ii) compreender de que modo a estratégia formativa trabalhada com os estudantes contribuiu para a mudança conceptual sobre a interpretação dos pictogramas de substância perigosas e iii) realçar a importância do conhecimento dos pictogramas de substâncias perigosas de forma a minimizar o potencial de ocorrência de acidentes ambientais, acidentes de trabalho e de doenças profissionais. Foi analisada a compreensão destes pictogramas por parte de 669 estudantes, antes e após formação sobre o tema. A análise dos dados por pictograma em função da área de formação, idade e estatuto de trabalhador estudante ou não, foi efetuada com ferramentas de estatística descritiva e através de testes de hipóteses. Em média, o nível de compreensão correto dos pictogramas após a formação (61.19%) foi superior ao observado antes da formação (30.75%). A formação em risco químico é essencial para melhorar o nível de compreensão dos respetivos pictogramas, e deverá ser valorizada e incluída nos currículos escolares desde a escolaridade obrigatória até ao ensino superior.
EFEITO DA CAFEÍNA NO DESEMPENHO FÍSICO DE ATLETAS DE DESPORTOS COLETIVOS: REVISÃO SISTEMÁTICA DA LITERATURA
Authors: Fernandes Ana , Pereira Ana , Fernandes António , Salselas Valdemar
Published: May 2023

A cafeína é um dos suplementos mais populares consumidos por atletas devido às suas propriedades estimulantes. A presente revisão sistemática teve como objetivo verificar se o consumo de cafeína tem efeitos no desempenho físico dos atletas de desportos coletivos. A partir da metodologia PRISMA (Principais Itens para Relatar Revisões Sistemáticas e Meta-análises) foram utilizadas para a pesquisa bibliográfica as bases de dados Pubmed e Web of Science. Na pesquisa inicial foram obtidos, no total, 670 artigos, sendo que, após a aplicação dos critérios de inclusão e exclusão, obteve-se uma amostra final de 19 artigos. Verificou-se que a cafeína é ergogénica para exercícios de força máxima, maioritariamente para a força dos extensores e flexores do joelho e força velocidade, predominantemente em exercícios de salto. Para tarefas de precisão e agilidade não se verificaram melhorias no desempenho com o consumo de cafeína e, para ações motoras durante jogos simulados e exercícios relacionados com resistência aeróbica, não foi possível concluir se a cafeína melhora o desempenho. Estes resultados sugerem a necessidade de mais estudos de forma a avaliar o efeito do consumo de cafeína no desempenho físico dos atletas.
DIABETES MELLITUS - A REALIDADE DE UM CONCELHO DE PORTUGAL
Authors: Coelho Patrícia , Seabra Anabela , Rodrigues Francisco
Published: May 2023

A Diabetes Mellitus é uma patologia considerada pela Organização Mundial de Saúde como a pandemia do século XXI. As avaliações feitas para o cálculo da sua prevalência, conhecimento e controlo estão dependentes de estudos de investigação junto da população que mostrem a realidade desta patologia, cuja tendência é aumentar exponencialmente, considerando-se, desta forma, de elevada pertinência o estudo epidemiológico da população portuguesa. Determinar a prevalência da diabetes na população adulta do concelho de Paredes é, assim, o objetivo. Trata-se de um estudo transversal e observacional, com recolha de dados prospetiva e aleatória em várias ruas do concelho de Paredes. Foram estudados 1054 indivíduos, dos quais 60,82% são do sexo feminino e 39,18% do masculino, com idades compreendidas entre os 18 e os 90 anos. A recolha de dados foi efetuada com recurso à avaliação dos níveis de glicose no sangue. Registou-se uma prevalência de diabetes de 8,4%%, dos quais 7,5% tinham conhecimento da patologia, 0,8% sabiam que eram diabéticos e tinham valores de glicémia aumentados e 0,9% correspondiam a indivíduos não diagnosticados igualmente com valores de glicémia aumentados. Existe uma elevada taxa de diabetes no concelho de Paredes e um número significativo de indivíduos que desconhece ser diabético.
EFICIÊNCIA NA ADMINISTRAÇÃO PÚBLICA CABO-VERDIANA: O CASO DA CASA DO CIDADÃO NA CIDADE DA PRAIA
Authors: Correia Eunice , Baía Amândio , Natário Maria
Published: May 2023

O presente trabalho tem como propósito estudar a eficiência da Administração Pública Cabo-Verdiana, tomando como estudo de caso a Casa do Cidadão na Cidade da Praia, Cabo Verde. Este tema também foi escolhido para conhecer o nível de satisfação da população com os serviços prestados pelas instituições públicas, em particular pela Casa do Cidadão da Cidade da Praia. A metodologia utilizada é de cariz quantitativa, assenta na exploração de bibliografias sobre o tema, bem como na recolha de dados via questionário, e na análise e apresentação dos resultados. Aplicaram-se questionários aos utentes da Casa do Cidadão residentes na capital do país, que procuram esta instituição para resolver as suas solicitações. Conclui-se que a reforma do Estado em Cabo Verde conduziu a uma série de reformas no sector da Administração Pública, com o objetivo de acelerar a modernização e melhorar a sua adaptação aos novos tempos. A Administração Pública Cabo-Verdiana está a inovar para melhor servir e estar mais próximo dos cidadãos e das empresas, criando serviços públicos com foco no cidadão. A Casa do Cidadão de Cabo Verde apresenta-se como um serviço de excelência, reunindo num único lugar vários serviços, facilitando, assim, a vida dos cidadãos. As conclusões do inquérito apontam que os inquiridos se encontram mais satisfeitos com a Casa do Cidadão nas questões da Tangibilidade e menos satisfeitos na dimensão Confiabilidade. A maior satisfação é em termos de apresentação dos funcionários da Casa do Cidadão, em termos de higiene e limpeza da Instituição (Dimensão Tangibilidade) e em termos da cordialidade e gentileza dos funcionários (Dimensão Empatia). A menor satisfação prende-se com o tempo de espera para se ser atendido (Dimensão Atendimento) e com o serviço prestado estar conforme o solicitado (Dimensão Confiabilidade). Estes resultados poderão contribuir para a definição de políticas públicas que conduzam à melhoria da qualidade e eficiência dos serviços da Casa do Cidadão Cabo-Verdiana, em particular, e à Administração Pública Cabo-Verdiana, em geral.
THE IMPORTANCE OF SERVICE VALUE AND CORPORATE IMAGE ON CUSTOMER SATISFACTION IN PORTUGUESE MOBILE BANKING SERVICES
Authors: Fragata Anabela , Lopes Luísa , Portugal Helena
Published: May 2023

This paper intends to empirically examine the creation of customer satisfaction, along with the influence of service value, corporate image and trust in Portuguese mobile banking services. The negative relationship between customer satisfaction and brand switching intention was also tested. The data was analysed by employing exploratory as well as confirmatory analysis and a Structural Equation Model was extracted from 120 Portuguese respondents. The results suggest a strong impact of corporate image in service value and both are positively related with customer satisfaction.
UTILIZAÇÃO DO COMÉRCIO ELETRÓNICO POR ESTUDANTES DO ENSINO SUPERIOR: ESTUDO COMPARATIVO ENTRE ALUNOS DO BRASIL E DE PORTUGAL
Authors: Fernandes Ana , Martins Lilian , Martins José , Martins Glauciene , Roque Vitor
Published: May 2023

Com o desenvolvimento das Tecnologias de Informação e Comunicação (TIC), as formas de fazer negócios modificaram-se. Surgindo em 1979, os primeiros indícios do comércio eletrónico, o e-commerce, termo originário do inglês, proporcionou uma nova maneira de fazer trocas de bens e serviços através da Internet, utilizando dispositivos eletrónicos. Atualmente, consumidores, empresas e instituições governamentais fazem negócios através dos meios virtuais de forma online. O comércio eletrónico cresce a cada dia bem como o número de pessoas (consumidores) que aderem às compras online. O presente artigo tem como objetivo conhecer os hábitos de consumo online dos estudantes de nível superior de duas instituições de ensino, uma no Brasil, o Centro Federal de Educação Tecnológica de Minas Gerais (CEFET-MG), e outra em Portugal, o Instituto Politécnico da Guarda (IPG). A partir da pesquisa efetuada, verificou-se que o comportamento de consumo online dos estudantes de ambas as instituições é semelhante, verificando-se apenas algumas variações em situações pontuais.
How Sterile Are Our Operating Rooms? A Comparison of Air Quality During Primary TKA and THA
Authors: DelliCarpini Gennaro
Published: May 2023

Introduction: Airborne Biologic Particles (ABPs) are a potential risk factor for infection following total joint arthroplasty. Factors such as temperature and humidity may affect the number of ABPs which can increase the risk of infection. Comparisons of ABP count between Total Hip Arthroplasty (THA) and Total Knee Arthroplasty (TKA) have yet to be made. Our study examines the differences in ABP count between primary THA and TKA procedures.

Methods: We analyzed all primary TJA procedures done within the same OR at an academic institution from April 2019 to June 2020. All procedures between the dates of March 15, 2020 – May 4, 2020 were excluded to avoid COVID-related confounding. Intraoperative measurements of temperature, humidity, and ABP count per minute were recorded. A report containing surgical data from the same time was generated using the institution’s Electronic Health Records (EHR) system and cross-referenced to the intraoperative measurements using procedure start and end times. ABP was calculated as an average ABP count per minute. Descriptive statistics were used to evaluate differences in variables of interest. P-values were calculated using t-test for continuous variables and chi square for categorical values.

Results: A total of 168 cases were included in the study, comprised of 98 (58.3%) primary THA and 70 (41.7%) primary TKA. No significant differences in room temperature or particle counts across all particle sizes were found between THA and TKA groups. Similarly, time spent in the room was not significantly different between THA and TKA. The only variable that was significantly different between the two groups was average relative humidity, with higher humidity in the THA group (46.9% + 7.56 vs 44.4% + 8.02, p=0.008).

Conclusion: There were no significant differences in temperature or particle count between primary THA and primary TKA procedures, suggesting OR air quality was similar between the two procedure types. Further investigation including additional variables such as OR size, airflow patterns, and different procedure types should be performed to better characterize the role of ABPs in air quality and infection risk.
PENEGAKAN HUKUM TERHADAP RESTORATIVE JUSTICE DALAM SISTEM PERADILAN PIDANA DI INDONESIA
Authors: Ternando Albi
Published: May 2023

Sistem peradilan Indonesia dalam praktek penegakan hukum pidana kerap mengikuti sebutan Restorative Justice, ataupun Restorative Justice dalam alih bahasa bahasa Indonesia diucap restorative justice. Keadilan restoratif ataupun keadilan restoratif berarti:“ sesuatu penyembuhan serta pelunasan kekeliruan yang dicoba oleh pelaku pidana yang di idamkan (keluarganya) kepada korban pidana (keluarganya) (usaha perdamaian) di luar majelis hukum dengan arti serta tujuan supaya mencuat permasalahan hukum dampak sesuatu perbuatan pidana bisa dituntaskan dengan bagus dengan persetujuan orang lain ataupun perjanjian para pihak. Tujuan waktu pendek yang diharapkan dari riset ini merupakan menciptakan pangkal kasus hukum hal Pembuatan Sah Restorative Justice. Tujuan jangka panjang dari riset ini merupakan jadi kerangka kegiatan yang pas serta efisien untuk aplikasi restorative justice dalam sistem peradilan pidana di Indonesia. harmoni, norma kesusilaan, serta penyampaian buah pikiran normatif terkini bisa ditemui.