bluuebunny/crossref_metadata_2025 huggingface dataset:
Performance of Fe-33Ni-18Cr Alloy at High Temperature Oxidation
Authors: Zulnuraini Zahraa , Parimin Noraziana
Published: September 2020

This paper investigates the performance of Fe-33Ni-18Cr alloy at high temperature oxidation. The samples were isothermally oxidized at three different oxidation temperatures, namely, 600 °C, 800 °C and 1000 °C for 150 hours. This alloy was ground by using several grits of SiC paper as well as weighed by using analytical balance and measured by using Vernier caliper before oxidation test. The characterization was carried out using scanning electron microscope (SEM) equipped with energy dispersive x-ray (EDX) and x-ray diffraction (XRD). The results show that, the higher oxidation temperatures, the weight gain of the samples were increase. Sample of 1000 °C indicate more weight gain compared to samples oxidized at 600 °C and 800 °C. The kinetic of oxidation of all samples followed the parabolic rate law. The surface morphology of oxide scale at lower temperature is thin and form a continuous layer, while at high temperature, the oxide scale develops thick layer with angular oxide particles.
Effects of Metakoalin on Municipal Solid Waste Incineration (MSWI) Bottom Ash-Cement Composite
Authors: Che Amat Roshazita , Ismail Khairul Nizar , Ahmad Khairel Rafezi , Ibrahim Norlia Mohamad
Published: September 2020

Municipal solid waste incinerators (MSWI) produce by products which can be classified as bottom and fly ashes. The bottom ash accounts for 85-90 % of solid product resulting from MSW combustion. The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) bottom ash as a supplementary cementations material for the preparation of blended cement. The used of bottom ash as a research material is caused by substances contained in cement is almost the same with bottom ash. Bottom ash was found to have some reactivity, but without greatly affecting the hydration process of OPC at 10 % replacement with 10% metakaolin is required to be used in the production of concrete in order to improve strength.
Effect of Different Firing Temperature on Thermal Conductivity of Ceramic Tiles
Authors: Shariff Khairul Anuar , Juhari Muhammad Syahir , Chan Lynette Wei Ling , Kasim Shah Rizal
Published: September 2020

The aim of this study is to investigate the effect of different firing temperature on thermal conductivity of ceramic tiles. The body formulation powders of ceramic tiles were made according to the formulation given by company and compacted at 18 MPa using pressing machine in order to obtain button shape specimen with 50 mm diameter. The button shape specimen was fired at different firing temperature which 1150°C, 1175°C, 1200°C and 1225°C. Then, the thermal conductivity of fired specimens was measured by using Hot-Disk Thermal Constant Analyzer. Thermal conductivity result shows that the ceramic tile body fired at 1150 °C producing the lowest thermal conductivity values (0.97 W/mK) in comparison with other specimens. This low thermal conductivity performance is due to the high porosity value in the specimen as a result of more trapped air and implies delaying the heat transfer either inward or outward from the ceramic tiles. Therefore, this study proved that by altering firing temperature, different thermal conductivity values of ceramic tiles were obtained.
Residual Properties of the Drawn Steel Wires for Damage-Based Fretting Fatigue Models of the Wire Ropes
Authors: Kamarudin Maslinda , Ahmad Zaini , Tamin Mohd Nasir
Published: September 2020

This paper presents the residual properties and parameters of the damage-based fatigue life prediction models of the steel wire ropes under fretting fatigue conditions. The damage mechanics-based approach is employed to develop the predictive method for the reliability of the steel wire ropes. The elastic modulus is dependent on the fatigue load condition and the accumulated number of the load cycles. The characteristic degradation of the Young’s modulus of drawn steel wires is established through the phenomenological presentation of the interrupted fatigue test data. The samples are given a quasi-static loading followed by a block cyclic loading with various stress amplitudes and ratios. The residual Young’s modulus is calculated after each block of cycles. The effect of the different loading condition with the amplitude and mean stress on the measured fatigue life of a single wire is presented using the life parameter, χ. The residual Young’s modulus data are presented in terms of normalized quantities. Significant reduction in the elastic modulus due to fatigue is exhibited after enduring 70% of the fatigue life of the material. The fitting constants are obtained, and the fitted equation is used to describe the degradation of Young’s modulus at N number of cycles. Subsequently, the data can be applied to predict the fatigue-life of steel wire ropes and assess its reliability through fretting-induced damage models.
The Effect of Al Micro-Alloying on Corrosion and Thermal Properties of Sn-Zn Alloy
Authors: Jumali Nordarina , Mohd Zaini Nurwahida , Sa'don Nur Syamira , Mohamad Ahmad Azmin , Mohd Nazeri Muhammad Firdaus
Published: September 2020

Electrochemical corrosion behavior of Sn–Zn solder alloys in 6 M potassium hydroxide solution was investigated by potentiodynamic polarization technique, aiming to investigate the role of Al additions. The effect of micro-alloying Al on the thermal properties was also studied by using DSC. The results reveal that the presence of Al content leads to increasing in corrosion potential yet reducing the corrosion current density and passivation current density, simultaneously. XRD analysis reveals the failure to produce new compound with Zn, limits the effect of adding Al towards the corrosion performance. Yet, significant improvement on thermal properties were seen, especially on the melting temperature and pasty range without modifying the eutectic melting behavior.
Balloon pulmonary valvotomy in severe dysplastic pulmonary valve restenosis
Authors: Rajan Palanivel , Revaiah Pruthvi C , Barwad Parag
Published: September 2020

Balloon pulmonary valvuloplasty (BPV) is an interventional procedure that has practically replaced the need of open-heart surgery in patients with severe valvular pulmonary stenosis. However, BPV in dysplastic pulmonary valve (PV) still remains a challenge in the current milieu of advanced technologies. We encountered a unique situation of severe restenosis of PV wherein the attempt to balloon dilate the valve was futile because no balloon remained stable at the level of the valve. This situation was overcome using a PDA device delivery sheath to keep the balloon positioned at the desired location.
Action convergence of operators and graphs
Authors: Backhausz Ágnes , Szegedy Balázs
Published: September 2020

We present a new approach to graph limit theory that unifies and generalizes the two most well-developed directions, namely dense graph limits (even the more general

$L^p$
limits) and Benjamini–Schramm limits (even in the stronger local-global setting). We illustrate by examples that this new framework provides a rich limit theory with natural limit objects for graphs of intermediate density. Moreover, it provides a limit theory for bounded operators (called P-operators) of the form

$L^\infty (\Omega )\to L^1(\Omega )$
for probability spaces

$\Omega $
. We introduce a metric to compare P-operators (for example, finite matrices) even if they act on different spaces. We prove a compactness result, which implies that, in appropriate norms, limits of uniformly bounded P-operators can again be represented by P-operators. We show that limits of operators, representing graphs, are self-adjoint, positivity-preserving P-operators called graphops. Graphons,

$L^p$
graphons, and graphings (known from graph limit theory) are special examples of graphops. We describe a new point of view on random matrix theory using our operator limit framework.
Multiple Foreign Bodies in a 5-Year Old: Non-Accidental Trauma
Authors: Mulenga Mulewa , Shinondo Patricia , Bvulani Bruce Chikasa
Published: September 2020

Foreign bodies, a significant proportion of which are a result of non-accidental trauma, are common but under-reported. Pediatric foreign body injuries can be inconsequential, severe or even fatal, and cause long-lasting morbidity and the need for treatment and hospitalization. Evaluation of injury or death requires elements of detection, pattern recognition, interpretation and comparison, all based on clinical, radiological and forensic experience with normal and abnormal findings. We report an unusual and strange case of non-accidental trauma in a young child who presented to our surgical services with 44 sewing needles and wires in his body. The patient had specific characteristics or risks for abuse. His injuries were evaluated, recognized, documented and reported. He was treated for peritonitis and malnutrition and the foreign bodies removed using staged operations under image guidance. Patient’s recovery was uneventful.

Keywords: Multiple foreign bodies, Trauma
Inion Not a Reliable Landmark of the Torcula in Posterior Fossa Craniotomies
Authors: Otieno Elisha Harry , Mwachaka Philip , Odula Paul , Cheruiyot Isaac , Munguti Jeremiah
Published: September 2020

Background: Sub-occipital craniotomies are used in surgical approaches into the posterior cranial fossa. The inion is used as an extracranial landmark of the torcula in burr hole placement. However, inadvertent damage to the torcula and the related sinuses due to variant intracranial location of the torcula has been reported. This study aimed at determining the position of the torcula in relation to the inion.

Method: 40 adult open skulls were obtained and the positional relationship between the inion and the torcula assessed. Results: The torcula was at the same level with the inion in half of the cases (50%), below it in 12 cases (30%), and above in 8 cases (20%). The position above the inion ranged from 0.38 to 2.40 cm and below it from 0.75 to 2.45 cm.

Conclusion: The torcula lies either at the level of the inion in only half of the cases. The surgeon should augment this physical landmark with radiographs to avoid iatrogenic injuries.

Keywords: Inion, Posterior fossa, Craniotomies
Epidemiology and Management of Peritonitis at a Rural Hospital in Zambia
Authors: Karachentsev Sergiy
Published: September 2020

Background: Peritonitis is a common surgical emergency with varying etiologies encountered the world over. It is associated with significant morbidity and mortality despite intensive research and advances in management.

Methods: Records of 119 patients operated on for peritonitis at a rural surgical hospital in Zambia over a 10-year period were retrospectively reviewed.

Results: Common sources of peritonitis were perforated peptic ulcer, acute appendicitis, pelvic inflammatory disease, and perforated terminal ileum. Postoperative period became complicated in 42 patients (32.3%). Fourteen patients (11.8%) died postoperatively; the highest level of mortality was in patients with perforated peptic ulcer (26%). Organ failure was found in 29 patients (24.4%) and was associated with increased risk of death.

Conclusions: Individual approach with identifying signs of organ failure is essential to determine the patient’s prognosis and decide on the level of care. Patients without organ dysfunction can be successfully managed in a rural surgical hospital.

Keywords: Peritonitis, Epidemiology, Morbidity, Mortality, Rural hospital, Zambia
Performance and behavior of a horizontal well in reservoir subject to double-edged water drive
Authors: Oloro J.O. , Adewole S.E.
Published: September 2020

Determining the performance and behavior of horizontal well subjected by double-edge water drive reservoir at a late time period has been a concern to many researchers. Wellbore pressure losses during production in horizontal well increase conning propensity at late period thus rendering some part of the horizontal well unproductive. This restricts the effectiveness of increasing the horizontal well length due to wellbore pressure losses along the horizontal well. This study was carried out by using source function and Newman rule to develop models to predict the performance and behavior of a horizontal well which was subjected by double Edgewater and numerical method was used for the computation and Sensitivity analysis of parameters was performed. The results show that the performance and behavior of the reservoir for this study were found to be when the well is position at well length (XWD: YWD: ZWD), in the ratio of 12:7:15 respectively.

Keywords: Double edged, Performance, Reservoir, Water Drive, Late Period.
Rheological characteristics of aluminium oxide (AL2O3) based nanolubricant
Authors: Ogbonnaya M. , Ajayi O.O. , Waheed M.A.
Published: September 2020

This paper presents the rheological measurement of aluminium oxide (Al2O3) nanolubricant. The nanolubricant was prepared using the two-step method from dry Al2O3 nanoparticles and Capella D lubricant as base fluid. The dynamic viscosity of the Al2O3 nanolubricant at constant shear rate was measured at atmospheric pressure in the temperature range of 278 K to 323 K for pure based lubricant along with nanolubricant mass concentration of 1%, 2% and 4% with nanoparticle size of 10 nm, 20-30 nm and 80 nm. The measured data was analysed using the linear fit and exponential function fit. The result showed that at constant particle size and concentration, the dynamic viscosity reduces with increase in temperature while at constant temperature, the viscosity increased with nanoparticle concentration. The exponential function fit regression best describe the relationship between the viscosity and temperature when compared with the linear fit regression while the polynomial function fit best describe the relationship between the viscosity and mass concentration.

Keywords: Dynamic viscosity, nanolubricant, shear rate, regression, concentration, temperature
Anomaly detection of android malware using One-Class K-Nearest Neighbours (OC-KNN)
Authors: Gyunka B.A. , Barda S.I.
Published: September 2020

The advent of the Android Operating System has recorded a remarkable ground-breaking opportunities in the Technological world. However, this great breakthrough also has a very dark side – an uncontrollable rapid continuous releases of malware in the wild, targeted at the platform and all its information and human assets. The misuse-based approaches adopted by many detection systems do no longer have the rigidity and the tenacity to accommodate the rapid successive releases of malware that come in great volume in order to keep up with active defenses against unknown and novel attacks. Systems that are capable of offering anomaly protection are thus in dire need. This study developed a normality model that is based on One-Class K-Nearest Neighbour (OC-kNN) Machine Learning approach for anomaly detection of Android Malware. The OC-kNN was trained, using WEKA 3.8.2 Machine Learning Suite, through a semi-supervise procedure that contained mostly benign and a very few outliers Android application samples. The OC-kNN had 88.57% true performance accuracy for normal instances while 71.9% was recorded as true performance accuracy for outliers (unknown) instances. The false alarm rates for both normal and outlier’s instances were recorded as 28.1% and 11.5%. The study concluded that a One-Class Classification model is an effective approach to be used for the detection of unknown Android malware.

Keywords: Android; Machine Learning, Malware, One-Class Classification, Anomaly Detection, Outlier Detection, Novelty Detection, Concept Learning, k-NN
Voltage stability analysis of the Nigerian Power System using annealing optimization technique
Authors: Mbunwe M.J. , Ekwue A.O.
Published: September 2020

The paper addresses the means of overcoming the challenge posed by voltage collapse to the stability of the Nigerian electric power system. The technique applied is based on time identification algorithm elaborating, at a given grid bus, the local phasor measurements at fast sampling rate. Elements such as adjustable shunt compensation devices, generator reactive generation, transformer tap settings are optimally adjusted at each operating point to reach the objective of minimizing the voltage stability index at each individual bus as well as minimizing the global voltage stability indicator. The control elements setting were optimized and the maximum possible MVA voltage stable loading has been achieved and a best voltage profile was obtained. Results of tests conducted on a 6-bus IEEE system and a typical 28-bus Nigerian power distribution network are presented and discussed.

Keywords: Special protection systems, voltage stability analysis, voltage stability limit, voltage collapse mechanism, system security
Critical motivational factors for enhancing employee performance in construction firms based on correlation and principal component analyses
Authors: Zailani M.B. , Ibrahim A.G. , Bahago Y.
Published: September 2020

Over the years, construction firms have often hinged their success on the effective motivation of their employees so as to ensure productivity and improved performance. Previous studies noted that various factors affect the motivational level of employees with regards to work performance. However, due to the difference in employee needs, not all motivational factors have influence on employees’ performance. This study sets out to assess the influence of motivational factors on the performance of employees in construction firms. The study aim was achieved through the identification and assessment of critical motivational factors (intrinsic and extrinsic) in the Nigerian construction firms. Perceptual data was collected from employees of selected construction firms using a structured questionnaire. Data collected was analyzed using descriptive and inferential statistics. Motivational factors were ranked based on respective mean scores from the most to the least influential. Extrinsic motivational factors such as promotion when due, availability of resources and provision of transportation for employees were found to be the most influential factors on performance. Whereas, constant supervision was found to have the least influence on performance. Findings of the study provides construction firms with empirical data on factors that influence the motivation level of employees with a view to optimizing employee productivity. It is recommended that construction firms should pay close attention to the peculiar needs of respective employees which aids in optimizing organizational performance.

Keywords: Motivation, Employee performance, construction firms, critical factors
Effects of varied process parameters on froth flotation efficiency: A case study of Itakpe iron ore
Authors: Akande S. , Ajaka E.O. , Alabi O.O. , Olatunji T.A.
Published: September 2020

The dire need for Itakpe iron ore concentrates of appreciable iron content meets for smelting operation necessitated this study. Core samples of the iron ore sourced from Itakpe, Kogi State, Nigeria were prepared for petrological analysis followed by chemical and particle size analyses. Froth flotation was done using different collectors at varying particle sizes and pH values. Characterization studies carried out revealed that Itakpe iron ore is a lean ore assaying 36.18% Fe2O3 and contains predominantly quartz, sillimanite, and haematite. Its liberation size lies favourably at 75 μm. Processing the ore by froth flotation yielded appreciable enrichment. Optimal recovery (~92%) was achieved using potassium amyl xanthate (PAX) at pH 11 for fine feed sizes (<125 μm) yielding iron concentrate assaying 67.66% Fe2O3. Thus, processing at this set-of-conditions is recommended for the industrial production of more enriched Itakpe iron ore concentrates.

Keywords: Process parameters, Froth flotation, Efficiency, Itakpe iron ore
Comparative study of oil recovery improvement by sterilization process using firewood and electricity
Authors: Akpan W.A. , Obot O.W. , Awaka-Ama E.J.
Published: September 2020

This study presents a palm fruits sterilization unit that was designed for firewood and electricity independently as sources of energy and its performance was evaluated. 2kg of palm fruit at 100 oC for 30, 45, 60, 75, 90, 105 and 120 minutes using steam generated from electricity was evaluated. The yield of the palm fruits was also evaluated at 100 oC for 30, 45, 60, 75, 90, 105 and 120 minutes using firewood to cook palm fruits directly in water. Further laboratory experiment was conducted to investigate the quality of oil obtained from fresh palm fruits cooked with steam and fresh palm fruits cooked in water. The maximum oil fluid recovery percentage at 100 oC for 120 minutes sterilization time using electricity energy source and firewood energy source were 27.1 and 26.0 % respectively. The experimental result shows that at 100 oC and 90 minutes of sterilization using firewood and electricity, oil released from the digested fibre accounted for 46 % (111.33 g) and 54 % (130.5 g) of the total oil content respectively. The free fatty acid ,content peroxide value and moisture content of the oil sample cooked with steam and in water at 100 oC for 90 minutes were 3.9 %, 8.5 (O2/kg), 0.11 % and 4.4 %, 10.3 (O2/kg), 5.5 % respectively. The boiler efficiency of 99.5% was achieved for the unit.

Keywords: Palm fruit, sterilization, oil recovery, boiler, firewood, electricity.
Medium term electrical load forecast of Abuja Municipal Area council using artificial neural network method
Authors: Ashigwuike E.C. , Aluya A.R.A. , Emechebe J.E.C. , Benson S.A.
Published: September 2020

This paper presents a medium-term electric load forecast for Abuja Municipal Area Council (AMAC) distribution network based on Artificial Neural Network (ANN). The technique results are compared with that of a conventional method (Multiple Linear Regression method), for the same data. The ANN proposed method takes into account the effect of temperature, time, population growth rate and the activities of different regions of city areas regarding lifestyle and types of consumers. The data of monthly to annual peak values are collected for the period from 2012 to first quarter of 2018. Hence, the Artificial Neural Network method presented a result with average MAPE of 0.00197 while the multiple linear regression having an average MAPE of 0.004545. The R-Value deviation was 8.06% and 34.42% for ANN and MLR methods respectively.

Keywords: Artificial Neural Network, Forecast, Load, Energy Demand, Capacity Allocation, Percentage error, Forecasting Accuracy.
Effect of nanosilica on the mechanical and microstructural properties of a normal strength concrete produced in Nigeria
Authors: Adamu I.M. , Kaura J.M. , Lawan A. , Ocholi A.
Published: September 2020

The failure of conventional concrete to have classical mechanical properties, reduced permeability and lead to sustainability in concrete production called for the use of supplementary Cementitious Materials (SCM) in concrete to improve its performance. This study investigates the effect of adding optimal dosage of an SCM called nanosilica (nS) on the tensile and compressive strengths, microstructural properties and cement hydration reaction for grade 30 concrete. The optimal dosage of the nS was determined to be 1.5% by weight of cement using compressive strength test. The influence of optimal nS dosage on the concrete properties was investigated using compressive strength test, splitting tensile strength test, Scanning Electron Microscopy (SEM) and Energy Dispersion Spectroscopy (EDS). Results revealed that optimal nS addition led to 30% and 23.3% respective increase in compressive and tensile strengths of conventional concrete at 7days of curing. SEM micrographs show better packing density in the nano-concrete at 90days of curing. EDS shows that addition of optimal nS dosage in concrete led to formation of more C-S-H gels at 90days curing period, and a corresponding reduction in Ca/Si ratio of the nano-concrete to 0.89; a ratio that is very close to that of 14Ǻ tobermorite reported in literature. The optimal nano-concrete can be used where strength improvement, especially at early age and reduction in concrete permeability are requirements.

Keywords: Compressive strength, Tensile strength, Normal strength nano-concrete, SEM, EDS.
Contrast of sludge toxicity variation during treatment of wastewater containing mixed chlorophenols and single chlorophenol
Authors: Chen Xiurong , Wang Yuan , Li Qiuyue , Yang Yingying , Wei Xiao , Wang Shanshan , Lu Quanlin , Sun Xiaoli
Published: September 2020

To address problems associated with the potential toxicity of sludge when it is applied in land utilization, this study investigated the variations by which activated sludge becomes toxic when fed with wastewater containing mixed chlorophenols, and compared variations in sludge toxicity due to inputs of mixed chlorophenols and single chlorophenol groups. In this study, 4-chlorophenol (4-CP), 2,4,6-trichlorophenol (2,4,6-TCP) and mixed chlorophenols which consist of both 4-CP and 2,4,6-TCP were studied in sequencing batch reactors (SBR). The results indicate that in 0-30 d, the toxicity of sludge fed with mixed chlorophenols is higher than that of sludge fed with single chlorophenol groups. During 50-100 d, the toxicity of sludge fed with mixed chlorophenols ranged between two single chlorophenol groups. EPS and protein in EPS had a significant relationship with sludge toxicity, but there was no significant relationship between polysaccharide in EPS and sludge toxicity.
Siirt İlinde Sebze Alanlarında Görülen Yabancı Otlar
Authors: Mesut SIRRI  , Cumali ÖZASLAN
Published: September 2020

Sebzeler taze olarak da tüketildiğinden hem zehirli yabancı otlarla karışık olmaması hem de pestisit kalıntısı içermemesi gerekmektedir. Bu nedenle sebze alanlarında görülen yabancı otların belirlenmesi hem insan sağlığı hem de yabancı ot kontrolü yönüyle büyük önem taşımaktadır. Uygun iklim koşullarının da bir sonucu olarak Siirt ilinde sebze üretim alanları sürekli artmaktadır. Ancak yörede sebzede sorun olan yabancı otların saptanmasına yönelik olarak daha önce herhangi bir çalışma yapılmamıştır. Bu nedenle Siirt ilinde toplam 40 tarlada sürvey çalışmaları gerçekleştirilmiştir. Sürveylerde sebze ekim alanlarında sorun olan yabancı ot türleri ve bunların rastlanma sıklıkları ile yoğunluklarının belirlenmesi hedeflenmiştir. Araştırmayla çalışma alanında 20 familyaya ait 52 farklı yabancı ot türü tespit edilmiştir. Saptanan yabancı otlardan 3’ünün tam parazitik ve 11’inin dar yapraklı olduğu diğerlerinin ise geniş yapraklı oldukları saptanmıştır. Dar yapraklı yabancı otlardan en fazla rastlanan ve en fazla yoğunluk oluşturan türlerin; Sorghum halepense (%67,5), Echinocloa crus-galli (%22,50) ve Cynodon dactylon (%17,5) olduğu saptanmıştır. Bölgede en fazla görülen ve yoğunluk oluşturan geniş yapraklı yabancı otların ise; Portulaca oleracea (%92,0), Amaranthus retroflexus (%82,0), Chrozophora tinctoria (%82,0), Alhagi pseudalhagi (%77,0), Solanum nigrum (%72,0), Heliotropium europaeum (%70,0), Amaranthus albus (%67,0), Xanthium strumarium (%65,0) ve Convolvulus arvensis (%57,5) olduğu belirlenmiştir.
Rekreasyonel Alanlarda Kullanılan Donatı Elemanlarında Kullanıcı Memnuniyetinin Belirlenmesi; Tokat Yeşilırmak Çevresi Örneği
Authors: Şüheda Basire AKÇA  , Funda ÜNAL ANKAYA
Published: September 2020

Bu çalışmada, Tokat ili halkının en sık kullandığı Yeşilırmak çevresinde bulunan rekreasyon alanlarındaki donatı elemanları ile ilgili olarak kullanıcı memnuniyetinin belirlenmesi amaçlanmıştır. Memnuniyet/ memnuniyetsizlik durumlarını belirlemek adına yöntem olarak anket çalışması tercih edilmiştir. 2019 yılında yapılan çalışma, Basit tesadüfi örnekleme yöntemine göre 384 rekreasyon alanı kullanıcısının donatı elemanları açısından memnuniyeti, % 5 hata payı ve% 95 güvenirlik ile belirlenmiştir. Kullanıcıların demografik yapısının yanı sıra 20 rekreasyon alanını doğru yansıtacak güçlendirme unsurları için ulaşım ve güçlendirme unsurları sorulmuştur. Likert ölçeğine göre puanlanan soruların puantaj değerlendirmesi, puanların ortalaması alınarak gerçekleştirilmiştir. Çalışma, kullanıcıların memnuniyet düzeyini azaltan unsurların nasıl ortadan kaldırılabileceği ve bunun yanı sıra memnuniyet düzeyini artırmak ve devamlılığını sağlamak açısından önemlidir.
Testamento y su Influencia en las Políticas de México
Authors: Higuera Sánchez Félix Mauro , Fonseca Ramírez Reyes Baltazar , Higuera Pacheco Ana Patricia
Published: September 2020

El testamento constituye sin duda alguna el documento legal que da certeza jurídica al patrimonio que perteneció a una persona que ha fallecido; sin embargo, la falta de este documento ha originado una serie de problemas que llevan a distancias familias que en un momento dado estuvieron muy unidas durante la vida del dueño del patrimonio.

    La falta de contar con una cultura del testamento en la sociedad mexicana, crece en proporción de la población, sin embargo, existen acciones por parte del Gobierno Federal por lograr concientizar a las familias de la importancia que reviste este documento y hacerlo como lo establece la ley, así como también dar certeza de control con el Registro Nacional de Avisos de Testamento
Automatización del Proceso de Aplicación de PA-5 en Troquelado de Terminales Críticas
Authors: Durán Jorge , Ruiz Erica , Espinoza Adolfo , García Armando , Andrade Patricia , Aguilar Juan , Ruiz Joel
Published: September 2020

El presente proyecto es realizado en una compan?i?a de arneses ele?ctricos. Esta compan?i?a presenta un problema en el troquelado del circuito trenzado con el conector de sen?al del arne?s. El conector para ser troquelado necesita de una lubricacio?n en su terminal y asi? evitar dan?ar los dados de troquelado los cuales son muy costosos. El proceso de lubricacio?n se realiza de manera manual lo que ocasiona un 40% de mermas en el producto, adema?s de la contaminacio?n por el exceso de lubricante utilizado. Por lo tanto, este trabajo propone automatizar el proceso de lubricacio?n de conectores, con la finalidad de mejorar la calidad del producto. Se disen?o? e implemento? un prototipo, mediante un microcontrolador arduino MEGA 2560, obteniendo como resultado un incremento del 70% en produccio?n, y reduccio?n de tiempos muertos, asi? como la eliminacio?n de contaminacio?n por residuos to?xicos.
Prevalencia de parasitosis y estimación del estado nutricio en niños preescolares de la comunidad rural de Bacame Nuevo, Sonora.
Authors: Felipe-Ortega Fonseca Ximena , Ruiz López Liliana , Icedo García Ramona , Balderrama Carmona Ana Paola , Vázquez Curiel Rosa Amelia
Published: September 2020

Uno de los principales problemas de salud en menores de 6 años son las parasitosis intestinales,estas surgen por falta de higiene, así como por el subdesarrollo en zonas tanto urbanas comorurales de México. En este estudio se determinó la prevalencia de parasitosis y desnutrición eninfantes de la comunidad indígena de Bacame Nuevo, Sonora, por medio un estudio descriptivoen donde participó una población de 71 niños de 4 a 6 años a los cuales al 26.8% se les realizaronanálisis de heces mediante los métodos (directo en fresco y con lugol), método de Faust, elmétodo de sedimentación con Brij L23, 30%. Al 100% de la población de estudio se lesdeterminó su estado de nutrición mediante evaluaciones antropométricas (EA) utilizando lasnormas de crecimiento establecidas por la OMS y CDC. Encontramos que 94.7% de los niñosanalizados presentó multiparasitosis hasta con 6 organismos diferentes. Este valor coincide conel reporte del SINAVE a nivel nacional, para infecciones por protozoarios y helmintos conmayor incidencia en este rango de edad. En la evaluación nutricional 35% de los niñospresentaron valores bajos de grasa corporal, 2% de delgadez extrema, 21.12 % macrocefaleacon respecto a su peso y edad, lo cual es un signo claro de desnutricion crónica y 48% de losniños analizados presentaron perímetros de cintura aumentados para su edad y talla, lo cual masque ser un indicativo de riesgo cardiovascular (ICC) es un reflejo de inflamación abdominalcaracterística de las parasitosis.
Situación de las Pymes de Hermosillo, Sonora ante la crisis presentada por COVID-19
Authors: Heredia Bustamante Alfredo , Aguilar Talamante Patricia , Sainz Zarate Nora
Published: September 2020

Para minimizar el impacto de la pandemia, es vital que las pequelas y medianas empresas (Pymes) lancen un plan de contingencia. La presente investigación, por su diseño es de tipo descriptivo y exploratorio y su objetivo es determinar con base en la apreciación que tienen los gerentes de las Pymes del sector comercio minoritario de Hermosillo, Sonora, cuál es su situación ante la crisis del COVID-19. Los resultados obtenidos en la investigación muestran que 1 de cada 3 empresas Pymes han sido afectada durante la crisis del COVID-19 y, para muchas de ellas la demanda disminuyó, generando así problemas financieros. Sin embargo, la experiencia vivida por estas empresas mostró que adaptarse a esta nueva condición, les hizo adoptar nuevas estrategias de gestión empresarial para llevar a cabo sus negocios. En conclusión, la nueva modalidad de gestión en Pymes debe partir de la innovación de estrategias basadas en las nuevas tecnologías que permitan tener modelos de negocios que puedan enfrentar las condiciones de cambiantes que vivimos día a día.
La estructura del estrés laboral
Authors: Carreón Guillén Javier , Bustos Aguayo José , Sánchez Sánchez Arturo , Martínez Muñoz Enrique , García Lirios Cruz
Published: September 2020

A partir de una aproximacio?n contingente a las organizaciones, en esta investigacio?n se plantea una estructura de estre?s laboral como efecto de la dina?mica grupal e interpersonal entre los empleados de un hospital pu?blico. Los resultados muestran que la estructura es bidimensional y que uno de los factores que la configuran es determinante del estre?s laboral. Se trata de la frustracio?n profesional que, en un modelo de regresio?n lineal mu?ltiple por pasos sucesivos, se revela como la variable determinante del estre?s laboral. A la luz de estos hallazgos se discuten las implicaciones de otras dos estructuras subyacentes inferidas en el ana?lisis de covarianzas: la estructura de la felicidad laboral y la estructura de la dina?mica de grupo.
Visão discente sobre a Educação Física (des)seriada no ensino médio
Authors: Silveira Lais Lanziotti da , Fonseca Denise Grosso da , Lettnin Carla da Conceição
Published: September 2020

A Educação Física no Ensino Médio do Colégio de Aplicação da Universidade Federal do Rio Grande do Sul tem uma dinâmica curricular específica, que se configura em turmas constituídas por alunos dos diferentes anos de ensino (1º, 2º, e 3º) e práticas corporais escolhidas pelos próprios estudantes, em assembleias. Essa proposta (des)seriada de organização das turmas está fundamentada, dentre outras teorias, nos princípios da Teoria da Autodeterminação (Self-Determination Theory), com o propósito de aumentar a permanência dos estudantes nas aulas de Educação Física. Esta pesquisa, de caráter qualitativo, teve por objetivo elucidar como os alunos do Ensino Médio da referida escola percebem a dinâmica da Educação Física desenvolvida, por meio de um grupo focal, constituído por 7 colaboradores. Do método de Análise de Conteúdo emergiram 3 categorias, denominadas: Conhecimento, Proposta (des)seriada e Importância da Educação Física, indicando que na visão dos estudantes a dinâmica da proposta de (des)seriação é válida, mas apresenta alguns aspectos que merecem ser revisados/(re)discutidos.
Uma análise das atividades circenses como conteúdo da Educação Física: aportes teóricos e práticos
Authors: Toledo Aron Martins , Zanotto Luana
Published: September 2020

A partir da análise da produção científica sobre os temários inter-relacionais do universo circense e da Educação Física escolar, este estudo objetiva analisar as potencialidades das atividades circenses no processo de formação de alunos e professores. Trata-se de uma pesquisa bibliográfica, perscrutando trabalhos relevantes na área publicados nos últimos dez anos. A literatura consultada indica que o trato pedagógico destas atividades podem auxiliar no desenvolvimento dos aspectos biodinâmico, artístico, afetivo e sociais dos sujeitos, o que caracteriza o circo como um completo e complexo objeto de ensino e aprendizagem. Do mesmo modo, amplia o conhecimento docente para o ensino. No entanto, foi verificado que a ausência de formação sistematizada e, por vez, interesse docente, somada a ausência de estrutura física e escassez de materiais, torna o ensino dificultoso. Relevamos o potencial das atividades circenses no âmbito da Educação Física mediante a oportunidade de formação continuada e formação docente para proposição de conteúdo e estratégias pedagógicas diversificados.
Efecto de un programa psicomotor mediante el uso del videojuego para el desarrollo del equilibrio
Authors: Ontiveros Terrazas Juan Antonio , Nieto Martínez Sandra Ivonne , Loya Peña Abelardo , Domínguez Velazco Vanely
Published: September 2020

Introducción: En la psicomotricidad el uso del juego es considerado como el elemento principal que influye en el desarrollo integral del niño. Objetivo: Conocer el efecto que produce un programa de intervención psicomotriz mediante el uso del videojuego en el desarrollo del equilibrio en niños de primer grado de primaria. Métodos. Se evaluó el equilibrio en pre y post-prueba mediante la Batería Psicomotora de Vitor da Fonseca en niños de primer grado de primaria. La muestra quedó conformada por un total de 25 alumnos (12 niños y 13 niñas), y dividida equiparablemente en grupos experimental y control. Para el tratamiento se aplicó un programa 20 sesiones a través del uso del videojuego Kinect Adventures de Xbox 360 con una duración aproximada de 10 minutos por sesión. Resultados: Las habilidades que presentaron diferencias estadísticas en equilibrio estático fueron las de apoyo rectilíneo (p=.011) y en punta de los pies (p=.003). Por su parte en equilibrio dinámico presentó diferencias estadísticas en las habilidades de marcha controlada (p=.002), evolución en el banco hacia atrás (p=.026), pie cojo izquierdo (p=.001), pie cojo derecho (p=.008), pies juntos adelante (p=.000), pies juntos atrás (p=.000) y pies juntos con ojos cerrados (p=.000). Conclusiones: El programa psicomotor mediante el uso del videojuego Kinect Adventures produce cambios significativos en el desarrollo del equilibrio de niños de primer grado de primaria.
A quarentena no enfrentamento às pandemias causadas por doenças respiratórias
Authors: Cordeiro Maria Eduarda Coelho , Ceccon Roger Flores
Published: September 2020

Este estudo objetiva descrever como a quarentena foi utilizada no enfrentamento às pandemias causadas por doenças respiratórias nas últimas décadas. Foi realizada uma Revisão de Literatura acercadas pandemias da Gripe Espanhola, Asiática, de Hong Kong, Gripe A e COVID-19 em diferentes países do mundo. As informações foram coletadas nas bases de dados MEDLINE, LILACS, PsychINFO, SciELO e Biblioteca Virtual em Saúde. Foram selecionadas e analisadas 34 referências. As pandemias apresentaram semelhanças no que tange as manifestações clínicas. Tiveram impactos sociais, econômicos e epidemiológicos, apresentando altas taxas de incidência e mortalidade. A quarentena foi utilizada como estratégia de controle para todas e os estudos evidenciam sua importância na prevenção de casos novos de mortalidade e para minimizar a sobrecarga dos sistemas de saúde. Apesar das dificuldades inerentes às estratégias de restrição de liberdade, a experiência de outras pandemias e as projeções apontadas em pesquisas demonstram que as medidas não-farmacológicas são fundamentais para a redução da incidência e mortalidade durante a atual pandemia da COVID-19.
Epidural hematoma in newborn: literature review
Authors: Nascimento Isabela do Prado , Kalkmann Gabriela Ferreira , Dos Santos Leticia Adrielle , Crestani Letícia Novak , Pereira Carlos Umberto
Published: September 2020

Introduction: Newborn represent a population at high risk for brain damage. Intracranial hemorrhages in newborn are uncommon, and epidural hematoma (EH) is rare.
Material and methods: The authors present a literature review about EH in newborn.
Results: EH in newborn occurs in only 2% and is frequently associated with the type of delivery. The clinical presentation is asymptomatic or heterogeneous. The diagnosis is made from anamnesis and imaging exams, and the treatment depends on the size of the EH.
Conclusion: The knowledge of neurosurgeons, obstetricians and pediatricians about the occurrence of EH in newborn is extremely important. The rapid identification and management of the case is of paramount importance, to reduce neurological sequelae.
A Bank Lending Channel that is working via Housing or via Consumer Loans? Evidence from Europe
Authors: Papadamou Stefanos , Arvanitis Vaggelis , Siriopoulos Costas
Published: September 2020

This paper, tests the bank lending channel of monetary policy transmission mechanism in a series of European countries since the Euro currency circulation. By disaggregating bank loans to households for consumer, housing and other purposes over the period 2003:Q1 to 2012:Q4, we try to shed light to any hidden dynamics by aggregate data. An unrestricted VAR model and impulse response analysis provide empirical evidence of an active bank lending channel working via housing loans for the majority of countries studied (Germany, France, Belgium, Italy, Spain, Sweden and UK). Additionally, there is evidence of a transmission mechanism proceed through consumer credit in Austria, Belgium and Netherlands. Moreover our results reveal that monetary transmission to housing loans proceeds quickly in Germany, Spain, Sweden and UK compared to the others. However in Belgium, Germany and UK, consumer credits reduction also amplifies the initial shock on GDP and on inflation produced by a tightening monetary policy. Finally, banks’ lending behaviour varies significantly according to the purposes of household loans. In Belgium, Sweden and UK, housing loans reductions coexist with increase of loans for consumption and other reasons, implying that the former is driven by supply forces while the latter by demand forces.
Liquidity buffers determinants in GCC’s Islamic banks
Authors: Essayem Amal , Khiari Wided , Lajmi Azhaar
Published: September 2020

The purpose of this paper is to understand determinants of liquidity buffers in the GCC’s Islamic banks. We apply the model of Bonner et al. (2005) on balanced panel data, bank specific data and annual balance sheet data for all reporting banks. The data cover a period of 8 years from 2004 until 2011 for 24 Islamic banks from GCC region that includes mainly Saudi Arabia, United Arab Emirates, Bahrain and Kuwait. Results show that liquidity buffers negatively related to the size of the bank, the capitalization is negatively related to liquidity buffers in Islamic banks in the GCC region and the ratio of deposits is negatively related to liquid assets holding in Islamic banks, but not statistically significant. In addition, we found a positive relationship between the profitability and liquidity buffers in Islamic banks of the GCC region. Finally, we found a different result when it comes to macroeconomic variables. First we noticed a negative impact of the inflation on liquidity buffers and second, a positive significant relationship between GDP real growth and liquidity buffers in Islamic banks in the GCC region. Our findings can serve as a tool for policy makers in the GCC region to adopt sounder strategies of liquidity management.
What Determines China’s Stock Prices? A CCAPM Horse Race
Authors: Liu Jinyu , Yang Siqun
Published: September 2020

This paper studies China’s stock prices in the framework of consumption-based capital asset pricing models (CCAPM). Using China’s quarterly stock market data from 1991 to 2019, we estimate and compare four versions of CCAPM: the classical CCAPM, CCAPM with housing service consumption, with habit formation, and with both. We find habit formation affects stock returns only if housing service consumption is considered. Further, although every model is consistent with data to certain extent, the models with habit formation perform substantially better. In particular, the model with both habit formation and housing service consumption fits the data best and has the largest explanatory power on risk premium. The findings imply that habit formation is an important determinant of China’s stock prices, and its impact is mostly via the channel of housing service consumption.
The politics of promise or threat and the praxis of hope: modeling a linguistic-phenomenological epistemology of practice for the assessment of alternative worldviews in media literacy
Authors: Wąsik Zdzisław
Published: September 2020

At the outset, I discuss selected conceptions of world images put forward by philosophers pertaining to human experience and the social construction of reality. Herewith, I am trying to clarify distinctions between appearances and experiences of things in the world and the abilities of humans to construe worlds beyond words, along with their being-in-world, and experiencing their in-the-world existence. Subsequently, I confront some epistemological theories about the complexity of scientific knowledge of the world and its fragmentary perception in psychophysiological cognition. What is relevant for the theme, I present the methods of the lived-through research in dealing with the ideology of promise or threat expressed by leaders of social movements who offer a hope for better worlds which are not here and not now but can be achieved in the future. Lastly, I submit proposals to approach the relationships between world and reality in their hierarchical ordering and semiotic modeling.
Representações do imigrante boliviano: questões enunciativas
Authors: Bueno Alexandre Marcelo
Published: September 2020

Os meios de comunicação são um espaço privilegiado para compreendermos como se constrói uma alteridade qualquer. Neste estudo, abordamos os modos como a imagem do imigrante boliviano pode ser construída a partir de diferentes posições enunciativas. Mais próximo ou mais distante, é corrente o discurso sobre o imigrante na mídia digital. No entanto, há também espaço para que o discurso do imigrante surja e, com ele, produzam-se outros efeitos de sentido que não somente passam pelo controle explícito das escolhas do enunciador. Para mostrar essas posições enunciativas, recorremos à Semiótica de linha francesa, elaborada por Algirdas Julien Greimas e seus colaboradores. Esperamos, assim, contribuir para as discussões acerca das representações, mas também das representatividades que grupos sociais minorizados devem buscar para não ficar à mercê da construção de suas imagens pelo grupo dominante.
Populismo: o grande levante semiótico
Authors: Fontanille Jacques
Published: September 2020

Populismo e populista são denominações que, ao mesmo tempo, são mal definidas – até indefiníveis – e cuja enunciação é, no entanto, eficiente. O argumento inicial deste estudo consiste em uma inversão dessa relação: é justamente por essa indeterminação que a enunciação é eficiente. A dificuldade de uma definição estável de populismo é uma consequência direta da transformação contemporânea do actante coletivo, ao qual chamamos povo, que é, ele próprio, hoje em dia, indeterminado, flutuante e heterogêneo. Um dos desdobramentos dessa situação consiste em reivindicar a denominação populista, porque essa reivindicação pública é uma legitimação tant da existência de um actante coletivo chamado povo quanto da coerência de temas e posições políticos associados. Assim, circunscrevemos o problema a ser tratado: por um lado, atribuímos ao populismo temas e posições políticos que não lhe são específicos e, por outro, associamos o populismo a paixões tristes (desconfiança, rejeição ao outro, sofrimento, ódio, medo...). Segundo pesquisas de opinião pública, tais paixões são compartilhadas pela maioria dos cidadãos, muito além apenas daqueles que votam nos candidatos populistas. Nossa hipótese é, então, que, no caso do voto e da expressão política populistas, essas paixões chamadas tristes funcionam como atratores dos temas e posições políticos associados ao populismo