bluuebunny/crossref_metadata_2025 huggingface dataset:
Web-based text editing system for Nigerian major languages
Authors: Kasali A.A. , Jimoh K.O. , Adeagbo M.A. , Bello S.A.
Published: October 2021

This study developed a web-based text editor to eliminate the incompatibility of computer keyboard with the three major indigenous languages in Nigeria. It also aims to reduce the time taken to produce characters with diacritical marks. The editors produced valid Unicode characters and require pressing less buttons to generating all the symbols of the alphabets for the three major indigenous languages in Nigeria. Client-side technologies were used to develop these applications. Three web pages, designated for Yorùbá, Igbo and Hausa language were generated with HTML. CSS was used to define the look and feel of the HTML elements on each page. Regular Expressions implemented in JavaScript functions were used to convert selected ASCII characters into desired Unicode characters. The editors are available at http://www.gazaliwakil.com.ng. The editors work well on latest version of browsers like (Google Chrome, Mozilla Firefox, Opera, and Internet Explorer). They are very light, consume minimal server resources and can work offline. The system was launched Fifty-one (51) times to extract data comprising the Loading, Scripting, Rendering, Painting, System, and Idle time. The obtained result showed that on the average, it takes about 13.77ms to load the HTML DOM elements, 42.83ms to load the javaScript, 13.10ms and 1.73ms for rendering and painting the page by CSS. Additional time taken are 43.91ms and 3,045.10ms for the system and idle time respectively. A total time of 3,160.43ms (3.16s) is required when any of the editors is launched before the page can accept inputs from the users. It also takes the editors 2.66ms to add diacritical marks on a letter. This would, in effect, not reduce the typing speed of users.
Design analysis and performance evaluation of a novel Multi-Cantilever Foil Bearing
Authors: Obaseki M. , Elijah P.T. , Alfred P.B.
Published: October 2021

This study gives an explanation to design analysis and performance evaluation of a novel multi-cantilever foil bearing (MCFB). The aim of this study is to develop a theoretical model that will explain the working principles of the cantilever foil bearing. A theoretical derivation of structural and vibration models were developed to find structural stiffness, equivalent viscous damping and maximum deflection. Findings show that the theoretical results of structural models have an equivalent structural stiffness of 58.59kN/mm, equivalent viscous damping of 0.599kNs/m and maximum deflection of 0.5675mm. The equivalent viscous damping is computed at a near zero circumferential coordinate (0.0350). The results obtained from vibration models show an equivalent structural stiffness of 58.74kN/mm, equivalent viscous damping of 0.228kNs/m and maximum deflection of 0.5675mm. Theoretical viscous damping coefficient varies from 0.23kNs/m at 24Hz to 0.026kNs/m at 200Hz when determined at maximum deflection of 0.5675mm and phase angle of 0.0350. This means the higher the frequency, the lower the viscous damping coefficient. The validation was done over frequency range 24-200Hz and at amplitude of 50mm at a 450 phase angle. The models were found to have compared well with experimental results in the prediction of equivalent viscous damping coefficient. The models can be relied upon to analyze the behaviour of MCFB and it can also form a theoretical background for the design and manufacture of Multi-Cantilever Foil Bearing.
Glulam beams: Performance of PVA and PUR adhesives on bending strengths of locally selected Nigerian timber species
Authors: Arum C. , Olofintuyi I.O. , Ekundayo O.O.
Published: October 2021

The applicability of structural timber to construction is due to its desirable qualities such as lightweight, aesthetics and eco-friendliness. However, continuous use of timber for structural purposes comes with the challenge posed by the anisotropic nature of various timber species. Advanced societies have developed and modified their sawn timber species in form of glue-laminated structural members such as beams, columns, joist etc. Nigeria timber species are yet to be fully explored along glued-laminated beams production. This paper assesses the suitability of three selected Nigerian timber species namely; Gmelina Arborea (ML), Terminalia superba (AF) and Pycnanthus angolensis (AK) for production of glued-laminated (glulam) beams. They are locally known respectively as Melina (ML), Afara (AF) and Akomu (AK). The applicability and glue-ability of the glues and their ultimate effect on the flexural strength were investigated through the use of two different types of glue components namely; polyvinyl acetate (PVA) and polyurethane (PUR) glue. The physical properties of the timber species such as moisture content (MC) and densities were determined using BS EN 408. The beams produced which are 1680mm by 150mm by 120mm in dimension were subjected to two points loading system to determine their flexural strengths and failure loads in accordance with ASTM D-198. The flexural strengths results indicated that Pycnanthus angolensis offered most resistance to bending loads with an average flexural strength value of 16.04N/mm2 when PUR glue was used and 13.04N/mm2 when PVA glue was used. The ANOVA result showed that glue types have significant effect on the flexural strength at confidence level of 95%. It was concluded that Pycnanthus angolensis is most suitable for structural applications. PUR is considered the better glue in terms of strength and glue-ability while PVA glue is considered better in terms of workability and applicability based on almost perfect glue line integrity achieved.
Study of density and void ratio relation for reconstituted tropical residual soil at varying fines contents
Authors: Okovido J.O. , Obroku E.O.
Published: October 2021

Soil behaviour may be hinged on the relative composition and nature of arrangement of the various component fractions embedded in the soil. Whether the component proportions of the fines (silt/clay) are interwoven within the voids of coarse (sand) grains, or that the coarse grains are dispersed within the fines mass would determine sandy or clayey soils characteristics. Density and voids ratio assessments of tropical residual soils were conducted in this study on compacted reconstituted binary blends of fines and coarse soils which were also subjected to cycles of sustained compression loads. The soil was separated into fines and coarse fractions by sieving through a 75μm sieve. Reconstituted soil samples were prepared from these two fractions in varying percentages ranging from zero fines content (0:100) to 100 percent fines fraction (100:0) in 10 percent increment. The results indicate that the moisture contents and changes in density due to moisture movements were insignificant for fines less than 40 percent. Compacted density and voids ratios were optimally maximum and minimum with values of about 2000kg/m3(dry density) and 0.2 respectively at fines contents of 20 percent. An optimal degree of saturation was also obtained at 20 percent fines. Optimum moisture contents were also obtained at about 30 percent with the corresponding optimum dry densities ranging from 2100kg/m3 to 2200kg/m3 from compression tests. The thresholds fines content therefore would depend on the stress state of the soil and may be about 20 or 30 percent for subgrade assessments or geotechnical considerations respectively and beyond the threshold fines content the fines fraction makes up the stress-carrying matrix for the soil mass thus controlling the soil behaviour.
Soil water characteristic curve of a compacted A-7-5 tropical red earth soil
Authors: Okovido J.O. , Obroku E.O.
Published: October 2021

Soil water characteristic curve (SWCC) is a very important property of unsaturated soil and by extension tropical red earth soils. This is because several other important soils’ properties can be related to it. The Filter paper method was employed in the determination of the A-7-5(5) tropical red earth WCC. The gravimetric water content was utilized in the computation of the SWCC. Four models, Fredlund and Xing (1994), FX; Van Genuchten (1980), VG; Brooks and Corey (1964), BC; and Kosugi (1996), K were used to estimate the SWCCs of the soil and the minimum SSEnorm (MSSE), Average Relative Error (ARE), and R2 values were used to determine the most suitable model for predicting the SWCC. Results show that all four models can be used to predict A-7-5(5) WCC as they all had R2 value greater than 89% although BC and K models perform best with coefficient of determination of over 97%. MSSE and ARE% were also significantly low for BC and K models.
Determination of work index of Filin Kokuwa Gold Deposit in Toro Local Government, Bauchi State Nigeria
Authors: Bwala D.M. , Abdulfattah F. , Alabi O.O. , Adewuyi B.O.
Published: October 2021

This report shows the work index of Filin Kokuwa Gold ore sample in Bauchi State, Nigeria. The “reference sample (granites)” were sourced from outcrops of granites around Toro town. The samples were crushed, ground, and pulverized using appropriate laboratory milling machine. 80% passing size for the gold ore and granites samples were obtained at 100μm sieve size for the ball mill feeds and products respectively. The work indexes of reference samples i.e. granites were used to calculate the work index of the Filin Kokuwa gold ore sample. The values of 13.277kWh/ton and 15.192kWh/ton were obtained respectively for the two different reference granites samples used and 14.21kWh/ton as their average which is the value of the work index of the Filin Kokuwa gold ore deposit. The energy required for grinding the ore was found to be 3.581kW.
Evaluation of the causes of flexible pavement failure; case study of Enugu/Port-Harcourt expressway
Authors: Amanamba E.C. , Chioke C. , Ekeleme A.C.
Published: October 2021

This study examined the causes of flexible pavement failure, taking the Enugu/Port-Harcourt expressway as a case study; to understand possible peculiarities. Chainages 101+400 and 125+925 were the most critical, having potholes of 500mm in depth; hence, soil samples were taken from these spots. The following tests were conducted: Particle size distribution, Atterberg limits, Permeability, Compaction, and California Bearing Ratio (CBR). The results obtained showed evidence of presence of clay in the subgrade; hence, concluding that the failure was mainly caused by poor soil material. From visual condition survey, it was noted that there were no drainages even at the critical paths of the alignment, and there was a significant proportion of Heavy Goods Vehicles (HGVs) which may not have been adequately considered during design.
Landing gear disassembly sequence planning using multi-level constraint matrix ant colony algorithm
Authors: Okafor E.G. , Jemitola P.O. , Ubadike O.C. , Abba M.T. , Sule G. , Mohammed M.H.
Published: October 2021

The life cycle of most complex engineering systems is greatly a function of maintenance. Generally, most maintenance operation usually requires the removal of failed part. Disassembly sequence planning is an optimization program that seeks to identify the optimal sequence for the removal of the failed part. Most studies in this area usually, use single constraint matrix while implementing varied complex algorithm to identify the optimal sequence that saves time associated with carrying out maintenance operation. The used of single constraint matrix typically has the drawback of computer higher storage requirement as well as time consumption. To address this problem, this study proposes Multi-Level Constraint Matrix Ant Colony Algorithm (MLCMACA). MLCMACA efficiency was validated using complex aircraft landing gear systems in comparison with genetic algorithms. The result shows MLCMACA superior performance from the perspective of reduced search time and faster tracking of optimal disassembly sequence. Hence is recommended for handling of disassembly sequence planning problems.
Design, simulate and construct a fingerprints attendance system with data logging
Authors: Basila A. , Danladi A.
Published: October 2021

Because of its uniqueness and accuracy over time, fingerprint has been used for identification for many years, more recently being automated due to advancement in computing capabilities, fingerprint identification is one of the most well-known and popular biometric identification systems. The methodology comprised of a power supply, input voltage to the LM7805 should be at least 2v greater than the required 5v output according to its rating from the datasheet; hence it requires an input voltage of atleast 7v. Hence, 9v battery was adopted with current rating of 1A for convenience. The LM7805 voltage regulator IC was used since we needed 5v. The Fingerprints Attendance System with Data-login was designed, simulated and implemented/constructed, and was able to address the attendance issues in Adamawa State University, Mubi by the following means: no time waste as the attendance is taken during lecture without intervention of the lecturer, managing the attendance is automated, no chance for buddy signing, real time attendance capture, evaluate level of attendance for students automatically. Also, this system can easily be applied for examination attendance and monitoring.
Durability properties of self-compacting concrete (SCC) incorporating cassava peel ash (CPA)
Authors: Abdulwahab M.T. , Uche O.A.U.
Published: October 2021

Self-compacting concrete (SCC) is a highly flowable concrete with enhanced strength and surface finish. The production of SCC requires high content of Portland cement (PC), which in turn consumes a lot of energy and emits greenhouse gases like CO2 and CH4 to the atmosphere during its production. Also, environmental pollution arising from agricultural wastes such as cassava peels, groundnut shells, is a cause of concern. Cassava processing centres alone generate approximately 40 million tons of wastes per annum in Nigeria, while attempts to eliminate them through burning or natural decomposition is sometimes unsuccessful. It is important to reduce the CO2 emission during the production of PC and environmental pollution caused by cassava peels through partial replacement of cement in the SCC. This study assesses the durability properties of SCC produced with cassava peel ash (CPA) at 5 %, 10 %, 15 %, 20 % and 25 % replacement level of cement. The effects of water absorption, acid (H2SO4) and salt (MgSO4) attack and elevated temperature were investigated on the CPA-SCC specimens. It was revealed that the CPA improves the resistance to H2SO4 and MgSO4 degradation while the performance is poor when subjected to elevated temperature compared to the control specimen. Also, an optimum of 5% cement replacement is recommended for grade 35 compressive strength of CPA-SCC. However, the rate of water absorption reduced to a minimum when CPA is used in SCC as a result of an improved pore structure of the CPA-SCC specimen.
Biological Characterization of Plasmodium falciparum Mitochondrial Heat Shock Protein PfHsp70-3: Possible Involvement in Malaria Pathogenesis
Authors: Nyakundi David O. , Boshoff Aileen
Published: October 2021

Malaria remains a global health burden accounting for many deaths and illnesses in sub-Saharan Africa notwithstanding many decades of research on the disease. P. falciparum, the causative agent of the most fatal form of malaria, expresses a repertoire of heat shock proteins (Hsp) that cushion the parasite against heat shocks as it shuttles between extreme temperatures in human and mosquito vector hosts. By so doing, such proteins promote parasite’s cytoprotection, survival and pathogenesis. Heat shock proteins are named according to their molecular weights and there are six P. falciparum Hsp70 (PfHsp70) found in various cell compartments with mitochondrial putative PfHsp70-3. Using indirect immunofluorescence, this study established mitochondrial localization of PfHsp70-3 though some more confirmatory studies would be needed in the future. PfHsp70-3 was found to be heat inducible and expressed during all stages of the intra-erythrocytic cycle of parasite development. This could be an indication of PfHsp70-3’s involvement in the infectivity process of P. falciparum by helping the parasite to resist heat shocks during malaria febrile episodes. Generally, the data obtained in this study will enhance the existing knowledge on the biology of P. falciparum mitochondrial heat shock protein functions and open possible avenues for targeting the specificity between PfHsp70-3 and its co-chaperones for drug development.

Keywords: Malaria, P. falciparum, Heat shock proteins, PfHsp70-3, pathogenesis
Pair Distribution Function Analysis and Electrochemical Performance of Mesoporous Carbon Nanomaterials Synthesized Through KOH and ZnCl2 Activation
Authors: Kibona Talam E. , Terban Maxwell W.
Published: October 2021

Mesoporous carbon has been synthesized by activating carbonized biogas slurry residues with ZnCl2 and KOH simultaneously. The carbon to activating agent mass ratios were kept at 1:4, while the ZnCl2 to KOH mass ratio varied from 4:0, 3:1, 2:2, 1:3, to 0:4. The highest BET specific surface area of 361 m2 g-1, micropore surface area of 231 m2 g‒1, mesopore surface area of 125 m2 g‒1, and total pore volume of 0.23 cm3 g‒1 which amounted to 78% mesopore content, were obtained for the sample with 3:1 ZnCl2 to KOH mass ratio. Scanning electron microscope (SEM) images were acquired to determine the surface morphology and energy dispersive X-ray (EDX) was used to determine surface composition of the samples. The short, medium, and long-range orders of the synthesized materials were studied using pair distribution function (PDF) analysis. PDF showed that in addition to the locally ordered carbon and silica phase components, samples activated using combined ZnCl2 and KOH also contained crystalline Zn2SiO4 phase with the willemite structure. Electrochemical studies in three-electrode cell system revealed maximum specific capacitance of 216 F g‒1 exhibited by sample with a ZnCl2: KOH mass ratio of 3:1 at a scan rate of 5 mV s‒1.

Keywords: Mesoporous carbon; Pair distribution function, Specific capacitance, supercapacitor
Vulnerability and Responses of Smallholder Farmers to Climate Change Effects in Semiarid Areas of Bahi and Kongwa Districts, Tanzania
Authors: Myeya Helena Elias
Published: October 2021

This study examined the vulnerability and responses of smallholder farmers to climate change effects in Semiarid Areas of Bahi and Kongwa Districts. A total of 366 household heads were involved in this study. The study employed questionnaire, interviews and documentary review as data collection techniques. Archival data for temperature, rainfall and crop yields were collected for trend analysis. Descriptive and inferential statistics were used to analyse quantitative data, content analysis was employed to analyse qualitative data. Simple linear trend analysis and Mann Kendall were used to establish trends. The findings indicate that smallholder farmers in the study area have noted reduced rainfall, increased temperature and reduced production as indicators of climate change. Results from archival data indicate insignificant decline of rainfall, significant increase of temperature and insignificant decline of crop yields at 5% significance level. As a response to these changes, smallholder farmers reported to use improved crop varieties, change planting dates, use intercropping, out-migrating and change land use practices. Several challenges were reported to hinder effective adaptation including inadequate capital, limited soft loans, limited weather information and deficient extension services.  It is concluded that the climate is changing in the study area calling for strengthening farmers’ adaptive capacity.

Keywords: Adaptive strategies, climate change effects, challenges, semiarid area, Tanzania.
Attitude of Swiss general practitioners to mandatory training in assessing fitness to drive of older drivers
Authors: Grob Philip , Pfäffli Matthias
Published: October 2021

AIMS OF THE STUDY: In Switzerland, drivers over the age of 75 must undergo a medical assessment of their fitness to drive every 2 years. This assessment is usually carried out by a general practitioner (GP). Since 2016, physicians require official accreditation (so-called level 1 competence) to perform these examinations. This can be obtained either by self-declaration of competence or by attending an accredited training course. Little is known about the Swiss GPs' views on this regulation. In this study, we investigated the attitude of GPs towards these modalities.
METHODS: A questionnaire was mailed to 2372 GPs in a large part of German-speaking Switzerland, 1198 of whom completed and returned the questionnaire. The anonymised data were analysed by descriptive statistics (frequencies, percentages) to summarise participant demographics and agreement with attitudinal statements.
RESULTS: The response rate was 50.5%. Sociodemographic data (age, gender, settlement area) of the participating GPs corresponded to those of the Swiss medical statistics. The majority (93.1%) of respondents worked in an outpatient setting, 6.9% in the inpatient sector. Overall, 34.4% of the GPs completed a training course and 47.7% submitted a self-declaration in order to acquire level 1 competence. Older and more experienced physicians had made more use of the self-declaration option. 58.1% of the respondents would like to retain the existing regulations. Of the respondents who had attended a training course, 51.7% considered themselves more competent in the assessment of older drivers after the training, and 76.1% would like to maintain the course duration of 1 day. Of the physicians surveyed, 70.8%  were of the opinion that level 1 examinations are a useful screening tool for older drivers who are unfit to drive, and 78.4% agreed that MFTD (medical fitness to drive) examinations of older drivers should be performed by GPs.
CONCLUSIONS: In Switzerland, the currently existing regulation for acquiring level 1 competence is widely accepted by GPs. Almost all respondents considered that they have sufficient knowledge to assess MFTD. However, the majority of GPs who had attended the training course indicated they have benefited from it. Periodic assessment of MFTD of older drivers was considered useful and should preferably be performed by GPs. These results show that the periodic assessment of older drivers' MFTD practised in Switzerland is well accepted.
A Study to Assess the Effectiveness of Structured Teaching Programme on Knowledge Regarding Pregnancy Related Specific Emotions and It’s Management among Primigravida women Residing in a Selected Community, Bailhongal, Belagavi District
Authors: M. Gauravva , Sanadi Arpana
Published: October 2021

Pregnancy in woman’s life brings many perspective changes. For the first-time mothers, which initiates a new social role, and they experience motherhood. Pregnancy happenings take place both emotionally and physically in mothers. The changes like neuroendocrine and biological that occur during pregnancy have profound psychological effects on expectant mothers. The pregnancy brings many emotions that play a very vital role in the development of the fetus during pregnancy. The purpose of the study was to evaluate the effectiveness of structured teaching programs on pregnancy-related specific emotions, and it’s management among Primigravida women. Methodology is a quantitative evaluative study was conducted among 60 Primigravida women of selected community, Bailhongal. The pre-experimental, one-group pre-test, and post-test research design was selected. Results: In the pre-test, the majority of the Primigravida women had 56.7% inadequate knowledge and 38.3% had moderate knowledge. After administration of structured teaching programme, 66.7% of the subjects had adequate knowledge; 23.3% had moderate knowledge and only 10% had inadequate knowledge regarding Pregnancy-related specific emotions, and it’s management in the post-test. The overall analysis of level of knowledge of Primigravida women regarding Pregnancy-related specific emotions and its management showed that mean knowledge scores of the subjects at pre-test were 13.75 (45.83%) found to be inadequate knowledge regarding Pregnancy-related specific emotions and its management. After administration of structured teaching program, mean knowledge scores of the subjects at post-test were 23.5 (78.33%) found to be significant. Conclusion: Findings of the study show that there was a significant difference in pre-test and post-test knowledge scores of Primigravida women. From this, it is concluded that the structured teaching program is effective in improving the level of knowledge of Primigravida women. And there was
Face Recognition Based Unsupervised Attendance File Generation Using Local Binary Pattern Histogram
Authors: M N Sumaiya , R C Nischitha , B Pavithra , Bhat Poorna M , B K Sindhu
Published: October 2021

Attendance management system is an important part of daily online /offline classroom evaluation. At the beginning and end of class, it is usually checked by the teacher, but it may appear that a teacher may miss someone or some students answer multiple times. Our project is based on face recognition and face recognition technologies. The concept of face recognition is to give a computer system the ability to find and recognize human faces fast and precisely in images or videos. Computers that detect and recognize faces could be applied to a wide variety of practical applications including criminal identification, security systems, identity verification etc. The entire process involved in our project can be categorized into two main processes as face detection and face recognition process. Face detection involves the detection of an input image for further processing. Face Recognition, where the detected and processed face is compared to the database of known faces to decide the correct person. The attractiveness of the proposed system is, it generates an attendance file which includes the subject name alongside other parameters which are already present. Easy accessibility of attendance using excels technology.
Značaj monitoringa kvaliteta vode u jezerima hidroelektrana
Authors: Rajaković-Ognjanović Vladana , Dašić Tina
Published: October 2021

When planning the construction of a hydroelectric power plant, an important segment is adequate monitoring of water quality. With an appropriate monitoring program, the multifunctional use of artificial lakes is enabled. Eutrophication (nutrient over-enrichment) of water in a lake is a phenomenon that has been noticed in all lakes. The consequence of eutrophication is the endangerment of the aquatic ecosystem. Eutrophication is a phenomenon that occurs as a response of the aquatic ecosystem to the increased concentration of nutrients, phosphorus (P) and nitrogen (N), due to natural and anthropogenic activities. Recent research indicates a correlation between local climate change and water circulation and the impact of climate change on all phenomena in the hydrological cycle. Temperature fluctuations, huge amounts of rain when precipitation is analysed, constant heating and increase in humidity all affect more intense eutrophication. The key conclusions of the research dealing with the construction of the hydroelectric power plant in Komarnica are: to introduce monitoring (permanent control) of water quality in lakes in order to minimize or control, even prevent eutrophication. Each artificial lake has its own unique characteristics. The dependence of chlorophyll, phosphorus and lake volume varies depending on the month, season and year. The proposal for the lake that will be built on Komarnica, which is part of the future hydroelectric power plant, is a monthly monitoring of the concentration of chlorophyll, nutrients and the volume of the lake. Seasonal monitoring depends on precipitation, hydrological and limnological characteristics and trends of dry and rainy episodes. Analyzes and previous research have shown that the introduction of mandatory parameters for monitoring water quality does not increase the cost of electricity production and energy conservation, but significantly improves and enhances the quality of the environment.
Analiza vremena ispitivanja i greške očitavanja pametnih brojila električne energije u zavisnosti od njihovog podešenja
Authors: Dukanac Đorđe
Published: October 2021

The time of checking the registers of smart meters of accuracy class 0.2 S for indirect measurement of active electricity via instrument transformers, during the first, extraordinary or periodic control and verification has been significantly increased according to the latest Rules on meters of active electrical energy of accuracy class 0.2 S from December 23, 2016. This is especially pronounced when the meter is set to show the measured value of electrical energy in kWh on the secondary side of instrument transformers with the often used meter of active electrical energy of accuracy class 0.2 S, rated phase voltage 110 / √3 V and for the rated current 1 A. In that way, the total time as well as the costs of testing such meters has increased a lot. In addition, with electricity meters set in this way with a resolution of three decimal places and a unit in kWh, there is an additional error when reading the measured value of active electrical energy and especially when calculating the energy loss of active electrical energy. A more acceptable approach to setting such meters will be considered.
Optimización del método de digestión por microondas y espectrofotometría de absorción atómica con generador de hidruro para la cuantificación de arsénico en diferentes matrices
Authors: Diez-Pérez-Núñez Diana , Colmán Derlysa , García Lilian , Nakagoe Saori , Ramírez Karina , Torres Oscar , Olivares José Chamorro , Mereles Laura
Published: October 2021

El arsénico es un metaloide natural presente abundantemente en la corteza terrestre que requiere ser estudiado; se caracteriza por su capacidad de bioacumulación y como consecuencia puede causar efectos nocivos en los organismos vivos. El objetivo del estudio fue optimizar los métodos analíticos para cuantificar arsénico total en muestras de agua, suelo y arroz. Para el estudio se colectaron muestras de agua y suelo de los humedales del Lago Ypoá, considerada un área con mínima actividad antropogénica, mientras que para el arroz se seleccionaron muestras comerciales de procedencia nacional de arroz pulido y descascarillado. La aplicación de los métodos de ensayo se llevó a cabo por duplicado mediante digestión ácida asistida por horno microondas y posterior cuantificación por espectrofotometría de absorción atómica con generador de hidruro. Se evaluaron pruebas de linealidad, recuperación y la adición de distintas proporciones de reactivos.   Se observó linealidad de la respuesta instrumental para la curva de calibración en el rango comprendido entre 0,2 a 12 µg.L-1, los porcentajes de recuperación fueron superior al 95 % y para las muestras de suelo se identificó que la proporción de reactivos adecuada para la cuantificación de arsénico total con menor sesgo fue de 3,5 mL HNO3 + 1 mL HF + 0,5 mL HCl + 0,6 g H3BO3 para 0,2 g de muestra. Estos resultados permiten delinear futuros trabajos para evaluar el contenido de arsénico en muestras ambientales para su aplicación en salud pública y apoyo a la producción agrícola y ganadera del país.
Pedagogical Diagnosis and Self-learning in the Training of Foreign Language Teachers
Authors: Tenesaca Josué Bonilla , Medina Isabel Batista , Alvarez Marisela Jiménez
Published: October 2021

Universities in charge of training foreign language teachers have the responsibilities to guarantee and improve their preparation. In doing so, it is still evident that within Hispanic speaking environments, foreign language contexts require much attention. Hence, the pedagogical diagnosis allows describing, analyzing, interpreting, and comprehending the educative reality of future foreign language teachers, to design strategies for educative intervention. These strategies may facilitate personalized attention for enhancing self-learning and developing linguo-professional potentialities from classroom diversity. This paper has the aim of revealing the importance of pedagogical diagnosis for personal implication of the future foreign language teacher, his conscious responsibility in self-learning, as an active transformer of the reality.  For the accomplishment of this task, several scientific methods such as analysis-synthesis, induction-deduction and hermeneutic were used.

 

Las universidades encargadas de la formación de profesores de lenguas extranjeras tienen la responsabilidad de garantizar y mejorar su preparación. Para ello, sigue siendo evidente que, en los entornos hispanohablantes, los contextos de las lenguas extranjeras requieren mucha atención. Por ello, el diagnóstico pedagógico permite describir, analizar, interpretar y comprender la realidad educativa de los futuros profesores de lenguas extranjeras, para diseñar estrategias de intervención educativa. Estas estrategias pueden facilitar la atención personalizada para potenciar el autoaprendizaje y desarrollar las potencialidades lingüísticas-profesionales desde la diversidad del aula. Este trabajo tiene como objetivo revelar la importancia del diagnóstico pedagógico para la implicación personal del futuro profesor de lenguas extranjeras, su responsabilidad consciente en el autoaprendizaje, como transformador activo de la realidad.  Para la realización de esta tarea se utilizaron varios métodos científicos como el análisis-síntesis, la inducción-deducción y la hermenéutica.
Attitudes towards natural sciences in students from mexico, colombia and peru
Authors: Chavez Williams Orlando Tapia
Published: October 2021

In science didactics the study of attitudes informs about the professional and socio-scientific profiles, for this reason this study has focused its analysis on Mexican, Colombian and Peruvian students to determine their attitudes towards the knowledge, teaching and learning of the natural Sciences. For this, a study was approached with a semantic differential scale allowing to conclude that the students have an intermediate level (between neutral and positive), finding only significant differences depending on the locality.

 

En didáctica de las ciencias el estudio de las actitudes informa sobre los perfiles profesiones y  socio-científicos, por ello este estudio ha centrado su análisis en estudiantes mexicanos, colombianos y peruanos para determinar sus actitudes hacia el conocimiento, la enseñanza y el aprendizaje de las ciencias naturales. Para ello  se abordó un estudio con una escala de diferencial semántico permitiendo concluir que los estudiantes poseen un nivel intermedio (entre lo neutral y lo positivo), hallando sólo diferencias significativas en función  a la localidad.
Relationship between School Climate and Early Years Teachers Professional Identity in Kenya
Authors: Magoma Phyllis M. , Mwoma Teresa , Waithaka Esther
Published: October 2021

This mixed methods research examined the relationship between school climate and early year’s teachers’ professional identity. Using a sample of 220 teachers in 44 schools, the researcher established that early years teachers’ professional identity was weak and school climate had an effect on the teachers’ professional identity. This article’s findings confirmed that among school climate variables safety in school, high teacher-pupil ratio, lack of adequate physical facilities, teachers not involved in decision making, poor working environment, heavy work load and lack of enough teaching-learning materials, as having a negative impact on the teachers professional identity. Lastly, in order to boost EYET (Early Years Education Teachers) professional identity, provision of positive climates in schools was found to be imperative.
Relevansi Delimitasi Perbatasan Maritim Dengan Faktor Lingkungan
Authors: Purwanti Evi
Published: October 2021

Introductioan: This article discusses the relevance of maritime border delimitation with environmental factors that affect the determination of delimitation.Purposes of the Research: The purpose of this study is to analyze the urgency of the role of the environment in the maritime border delimitation process. Specifically focused on analyzing whether there is a positive relationship between environmental considerations and the development of the delimitation process and to determine the environmental factors that influence the delimitation.Methods of the Research: This research uses normative research with a conceptual approach. Researchers use relevant environmental law concepts in the maritime border delimitation process.Results of the Research: The results of the study show that there is a relevance of environmental factors in determining maritime border delimitation, among others from factors: conservation of wildlife reserves, the principle of natural prolongation, the principle of sustainable development, mineral resources, and fisheries. The relationship between environmental factors and the delimitation process occurs in two ways: First, environmental considerations show a direct influence in the selection of the delimitation method. Here environmental factors are an important motive in the delimitation process. Second, environmental factors affect the delimitation process indirectly where there are a number of delimitation agreements that do not include specific provisions regarding the environment, but the evidence shows that the parties are motivated by environmental factors in negotiating delimitation.
Perlindungan Hukum Terhadap Hutan Mangrove Pada Areal Pesisir Pantai
Authors: Wattimena Ricky Marthin , Leatemia Wilshen , Tahamata Lucia Charlota Octovina
Published: October 2021

Introductioan: One of the potentials of mangrove forests is to prevent coastal abrasion. With the existence of mangrove forests, erosion of coastal areas during the rainy season can be minimized. Besides that, mangroves can also be an ecosystem for crabs and various other types of fish. However, in the course of development, many times mangrove forests are converted and also destroyed because of development interests by individuals and development companies.Purposes of the Research: The purpose of this article is to find out how to regulate the management of coastal areas and how to protect the law against mangrove forest areas on the coast of Piru Village, West Seram Regency.Methods of the Research: This research is a normative research using a statutory approach with sources of legal materials used are primary legal materials, secondary legal materials and tertiary legal materials with qualitative analysis.Results of the Research: The results of the study found that the regulation related to the management of coastal areas is regulated in Law No. 1 of 2014 and in its implementation in the field there is still damage to mangrove forests, especially in the coastal area of Piru Village, West Seram Regency and is detrimental to coastal communities because the coastal area is an area that should protected because it is important for the sustainability of the community in the area.
Az energiatakarékosság fontossága és módszerei egy energetikai versenyen keresztül
Authors: Molnárné Dőry Zsófia , Reményi Dominika , Dőry István , Topercer Tamás , Dőry Magdaléna , Kéry Magdolna
Published: October 2021

Az energiatakarékosság kulcskérdéssé vált a világon az elmúlt évtizedek szennyező és fenntarthatatlan energiafogyasztási szokásai miatt. Az energiaelőállításnak mind a forrásaival, mind a mértéktelenségével, az energiatermelési, -szállítási és -felhasználási technológiák hatékonyságával és mind a céljaival kritikus gondok vannak jelenleg. A világ energetikai és klímaválságának megoldásában kiemelkedő szerepet játszik az energiatakarékosság megvalósítása globális és lokális szinten egyaránt. Az idei évben (2020-2021) is megrendezésre került a GreenDependent Intézet által szervezett, és az E.ON Hungária Zrt. által támogatott, országos EnergiaKözösségek verseny, melyen az Edutus Egyetem hallgatóinak és oktatóinak részvételével az EDU csapat első helyezést ért el. Az energiatakarékosság fontosságát és módszereit mutatja be a cikkünk az EDU csapat által a versenyen is alkalmazott elméleti megfontolások és gyakorlati tapasztalatok alapján.
Járműtrajektóriák definiálásához szükséges határértékek meghatározása klasszikus módszerekkel
Authors: Ficzere Péter , Borbás Lajos
Published: October 2021

Autonóm járműirányítás esetén a trajektória meghatározása az egyik legfontosabb feladat. A pályagörbe meghatározása azonban jócskán túlmutat a technológiai feltételeken, hiszen az esetek többségében ezek a járművek embereket szállítanak, és emberi sofőrökkel irányított közlekedési rendszerben mozognak. Így fontos, hogy az emberi tűrőképességet, reakcióidőket, komfortzónákat is figyelembe vevő rendszert tudjunk megvalósítani. Az ehhez szükséges, jelenleg emberi sofőrök által vezetett járműveken végeztünk méréseket, amelyek segítenek a komfortzónák határait meghatározni.
Redes sociales de segundo orden – Facebook–: un acercamiento desde la teoría social de sistemas de Niklas Luhmann
Authors: Franco Montoya Juan Carlos , Sánchez Franco Santiago
Published: October 2021

Las redes sociales de segundo orden se vienen configurando en un escenario que ha propiciado grandes reflexiones, críticas e investigaciones, y cada día ofrecen mayor cantidad de elementos para todos aquellos que de alguna manera u otra desean abordarlos como objeto de reflexiones e investigación. Lo que se pretende en este artículo es hacer una lectura reflexiva de las redes sociales, vistas desde la arquitectura conceptual y analítica teórica desarrolla por el Sociólogo Alemán Niklas Luhmann, la cual se enfocará en la red social Facebook como campo de interpretación. Dicha reflexión se plantea a partir de un análisis tipo embudo, desde el cual se esboza una secuencia que parte de los desarrollos conceptuales y teóricos generales propuestos por el autor, para luego hacer una lectura específica del campo estableciendo de esta forma un conjunto de relaciones que configura una nueva mirada, desde lo que el autor plantea como mass media. Como reflexión abierta se puede destacar cómo la Teoría General de Sistemas Sociales de Niklas Luhmann se puede convertir en una potente arquitectura conceptual y teórica que puede apoyar el desarrollo de estudios relacionados con las redes sociales de segundo orden tanto desde el punto de vista básico como aplicado.
Sectarismo mediático de la hegemonía conservadora, análisis del semanario la buena prensa de Medellín 1910-1927
Authors: Osorio Vergara Felipe
Published: October 2021

Durante gran parte de los siglos XIX y XX, Antioquia fue reconocida por su filiación al Partido Conservador y por su catolicismo, convirtiendo al departamento en un importante bastión de la Hegemonía Conservadora. La Medellín de comienzos del siglo XX no fue ajena a esta tendencia, pues incubó semanarios conservadores y católicos como La Buena Prensa (1910-1927). En este análisis de prensa se expone qué defendió este semanario y cómo entendió el catolicismo, toda vez que La Buena Prensa fue exponente del periodismo devocional y partidista. Este periódico ejerció oposición al liberalismo y al comunismo, pero también a la masonería, al feminismo y a la Unión Republicana. Por otro lado, con su pluma defendió el conservatismo y la Iglesia católica, buscando infundir en sus lectores el ideal de República y sociedad que ellos consideraban como correcto. Así, La Buena Prensa es reflejo de la influencia religiosa en la Antioquia de principios del siglo XX y ejemplo de la estrategia eclesiástica de emplear la prensa como instrumento para moralizar a la población.
Factores generadores de agresión escolar entre adolescentes mujeres en dos instituciones educativas de Medellín
Authors: Zabala Sanabria Nohora Alcira , Granda Berrío Claudia , Ortega Rojas Carlos Mario
Published: October 2021

En este artículo se divulgan los resultados de una investigación cuyos objetivos pretendieron develar factores comportamentales y percepciones que generan agresividad, entre las adolescentes de las instituciones educativas Fátima Nutibara y Fe y Alegría Popular Nº1, pertenecientes a estratos entre 1 y 2, y 2, 3 y 4, respectivamente, en la ciudad de Medellín. El estudio se dio a raíz de la preocupación de las autoras, en su labor diaria de maestras estatales, por la situación problémica y recurrente de agresividad entre las niñas que, de no investigarse e intervenirse, se suma peligrosamente a la reconocida e histórica violencia hacia la mujer en este país. En tal sentido se decide desarrollar un estudio de tipo descriptivo que inicia explorando las conductas e imaginarios de las estudiantes para detallar factores generadores de violencia escolar entre adolescentes mujeres en la cotidianidad escolar de ambas instituciones, lo cual es fundamental para futuras intervenciones educativas en bien de una mejor convivencia escolar en sus contextos. La estructura metodológica se desarrolló con un enfoque cualitativo etnográfico, hacia un análisis interpretativo y descriptivo de lo que las estudiantes expresan sobre sus episodios de agresividad en la escuela, para extractar posibles factores que le dan origen. El estudio concluye que factores asociados a categorías como autoimagen y emocionalidad, entre otros, están generando violencia entre adolescentes mujeres en ambas instituciones. Estos hallazgos implican que ambas instituciones deben intencionar en sus diseños curriculares, prácticas educativas que fortalezcan de manera directa el autoconcepto de las estudiantes y su inteligencia emocional.
Editorial. Entre lecturas y lógicas
Authors: Arango Zuleta Elvia Patricia
Published: October 2021

Editorial
Fe y razón en psicología: tres casos históricos de ruptura con la fe y sus repercusiones epistemológicas
Authors: Arias Gallegos Walter Lizandro
Published: October 2021

El presente artículo explora la ruptura entre la fe y la razón a través de tres casos históricos de personajes que han tenido una relevancia significativa para la psicología contemporánea: Theodore Fechner, Charles Darwin y Jean Piaget. El tema se plantea desde las búsquedas filosóficas y científicas que confrontan cuestiones metafísicas y empíricas redundantes en los dualismos característicos de la cultura occidental. Se analizan las implicancias epistemológicas de esta ruptura y se propone una nueva mirada a la psicología, desde la fe, desde una visión y actitud integral, no fraccionada ni reduccionista, desde que se le ubica como una ciencia de la naturaleza.