bluuebunny/crossref_metadata_2025_split huggingface dataset:
Catalytic Cracking of Palm Oil Over Zeolite Catalysts: Statistical Approach
Authors: S. Bhatia F. A. A. Twaiq and , M. Zabidi N. A. 
Published: October 2018

The catalytic cracking of palm oil was conducted in a fixed bed micro-reactor over HZSM-5, zeolite ? and ultrastable Y (USY) zeolite catalysts. The objective of the present investigation was to study the effect of cracking reaction variables such as temperature, weight hourly space velocity, catalyst pore size and type of palm oil feed of different molecular weight on the conversion, yield of hydrocarbons in gasoline boiling range and BTX aromatics in the organic liquid product. Statistical Design of Experiment (DOE) with 24 full factorial design was used in experimentation at the first stage. The nonlinear model and Response Surface Methodology (RSM) were utilized in the second stage of experimentation to obtain the optimum values of the variables for maximum yields of hydrocarbons in gasoline boiling range and aromatics. The HZSM-5 showed the best performance amongst the three catalysts tested. At 623 K and WHSV of 1 h-1, the highest experimental yields of gasoline and aromatics were 28.3 wt.% and 27 wt.%, respectively over the HZSM-5 catalyst. For the same catalyst, the statistical model predicted that the optimum yield of gasoline was 28.1 wt.% at WHSV of 1.75 h-1 and 623 K. The predicted optimum yield of gasoline was 25.5 wt.% at 623 K and WHSV of 1 h-1.KEY WORDS: Catalytic Cracking, Palm Oil, Zeolite, Design Of Experiment, Response Surface Methodology.
A New Fast Approximate Hilbert Transform with Different Applications
Authors: Hossen Abdulnasir 
Published: October 2018

A new and fast approximate Hilbert transform based on subband decomposition is presented. This new algorithm is called the subband (SB)-Hilbert transform. The reduction in complexity is obtained for narrow-band signal applications by considering only the band of most energy. Different properties of the SB-Hilbert transform are discussed with simulation examples. The new algorithm is compared with the full band Hilbert transform in terms of complexity and accuracy. The aliasing errors taking place in the algorithm are found by applying the Hilbert transform to the inverse FFT (time signal) of the aliasing errors of the SB-FFT of the input signal. Different examples are given to find the analytic signal using SB-Hilbert transform with a varying number of subbands. Applications of the new algorithm are given in single-sideband amplitude modulation and in demodulating frequency-modulated signals in communication systems.Key Words: Fast Algorithms, Hilbert Transform, Analytic Signal Processing.
Enhanced Coagulation Efficiency of Moringa Oleifera Seeds Through Selective Oil Extraction
Authors: A. Muyibi Suleyman , Fakrul Razi Ahmadun Saad A. Abbas Megat Johari M. M. Noor 
Published: October 2018

In this laboratory based study, varying quantities of oil, corresponding to 20 % w/w, 25 % w/w and 30 % w/w kernel weight extracted from Moringa oleifera seeds ( S1, S2, S3) respectively were applied in the coagulation of model turbid water (kaolin suspension) and turbid river water samples from River Batang Kali and River Selangor in Malaysia to determine the percentage oil removed which gave the best coagulation efficiency. For model turbid water (kaolin suspension) coagulation of low turbidity of 35 NTU, medium turbidity of 100 NTU and high turbidity of 300 NTU, sample S2 gave the best turbidity removal corresponding to 91.7%, 95.5% and 99% respectively. Application of sample S2 to River Batang Kali with low initial turbidity of 32 NTU and high initial turbidity of 502 NTU gave a highest turbidity removal of 69% and 99% respectively. Application to River Selangor with medium initial turbidity- of 87 NTU and high initial turbidity of 466 NTU gave a highest residual turbidity' of 94% and 98.9%, respectively.Key words: Moringa oleifera seed, selective oil extraction, coagulation, model turbid water (kaolin suspension), river water, turbidity removal.
Conventional Treatment of Surface Water Using Moringa Oleifera Seeds Extract as a Primary Coagulant
Authors: Thamer A. Mohammed Suleyman A. Muyibi, Ahmed Hissein M Birima, , M. M. Noor Megat Johari 
Published: October 2018

The present study involved the use of a model pilot scale water treatment plant to treat turbid surface water from a stream using processed Moringa oleifera seed with 25 % w/w oil extracted as primary coagulant. The water treatment plant was made up of four unit operations: coagulation, flocculation, sedimentation, and filtration (rapid sand filter). Test runs were carried out for three hours per run over a three-month period with turbidities ranging from 18 to 261 NTU. The turbidity, pH, and alkalinity as well as the filter head loss were measured every 30 minutes during the experimental runs. Average turbidity removal of up to 96 % at an effective doses of 20 and 30 mg/l of oil extracted M. oleifera for low (< 50 NTU) and moderate turbidity (< 100 NTU) water respectively was observed doses 50 – 80 mg/l for high turbidity (> 100 NTU) water. M. oleifera seed extract was found to have no significant effect on pH or alkalinity of the water. The residual turbidities measured during most of the test runs satisfied the Malaysian Guideline for Drinking Water Supplies. Key Words: Moringa oleifera, primary coagulant, coagulation, pilot plant, filtration.
Anti-Windup Scheme for Practical Control of Positioning Systems
Authors: Tarig Faisal and Abdulgani Albagul Wahyudi 
Published: October 2018

Positioning systems generally need a good controller to achieve high accuracy, fast response and robustness. In addition, ease of controller design and simplicity of controller structure are very important for practical application. For satisfying these requirements, nominal characteristic trajectory following controller (NCTF) has been proposed as a practical point-to-point (PTP) positioning control. However, the effect of actuator saturation can not be completely compensated for due to the integrator windup as the plant parameters vary. This paper presents a method to improve the NCTF controller for overcoming the problem of integrator windup using simple and classical tracking anti-windup scheme. The improved NCTF controller is evaluated through simulation using a rotary positioning system. The results show that the improved NCTF controller is adequate to compensate for the effect of integrator windup. Keywords: Positioning, point-to-point, integrator windup, compensation, controller, robustness.
Esterification of Palmitic Acid with Methanol in the Presence of Macroporous Ion Exchange Resin as Catalyst
Authors: Subhash Bhatia Amelia Qarina Yaakob and 
Published: October 2018

The esterification of palmitic acid with methanol was studied in a batch reactor using macro porous ion exchange resin Amberlyst 15 as a catalyst. Methyl palmitate was produced from the reaction between palmitic acid and methanol in the presence of catalyst. The effects of processing parameters, molar ratio of alcohol to acid M, (4-10), catalyst loading (0-10 g cat/liter), water inhibition (0-2 mol/liter), agitator speed (200-800 rpm) and reaction temperature (343-373K) were studied. The experimental kinetic data were correlated using homogenous as well as heterogeneous models (based on single as well as dual site mechanisms). The activation energy of the reaction was 11.552 kJ/mol for forward reaction whilst 5.464 kJ/mol for backward reaction. The experimental data fitted well with the simulated data obtained from the kinetic models. Keywords: Palmitic Acid, Methanol, Esterification, Ion Exchange Resin, Kinetics.
Behaviour based Mobile Robot Navigation Technique using AI System: Experimental Investigation on Active Media Pioneer Robot
Authors: V.Ganapathy S. Parasuraman, , Shirinzadeh Bijan 
Published: October 2018

A key issue in the research of an autonomous robot is the design and development of the navigation technique that enables the robot to navigate in a real world environment. In this research, the issues investigated and methodologies established include (a) Designing of the individual behavior and behavior rule selection using Alpha level fuzzy logic system (b) Designing of the controller, which maps the sensors input to the motor output through model based Fuzzy Logic Inference System and (c) Formulation of the decision-making process by using Alpha-level fuzzy logic system. The proposed method is applied to Active Media Pioneer Robot and the results are discussed and compared with most accepted methods. This approach provides a formal methodology for representing and implementing the human expert heuristic knowledge and perception-based action in mobile robot navigation. In this approach, the operational strategies of the human expert driver are transferred via fuzzy logic to the robot navigation in the form of a set of simple conditional statements composed of linguistic variables.Keywards: Mobile robot, behavior based control, fuzzy logic, alpha level fuzzy logic, obstacle avoidance behavior and goal seek behavior
An AT89C52 Microcontroller Based High Resolution PWM Controller for 3-Phase Voltage Source Inverters
Authors: S. J. M. Idrus K. M. Rahman and 
Published: October 2018

A novel technique for generating real time high resolution pulse width modulated patterns for a three phase voltage source inverter is presented in this paper. An AT89C52 microcontroller computes the PWM pulse widths on carrier cycle basis based on the input frequency. The microcontroller send the pulse width information for the three phases to a memory minimized ROM lookup table, which is scanned by a binary counter to generate the real time PWM patterns. The on board timer of AT89C52 is utilized to generate programmed clock for the scanning binary counter. The overall design is hardware minimized and compact that makes it feasible for low cost high performance ac drive applications. The proposed PWM controller supports variable frequency variable voltage operation for wide range and hence is ideally suited for industrial drives requiring wide speed variations. Keywords: Pulse width modulation, Microcontroller application, Voltage source inverter, variable speed ac drives.
Mems Electromagnetic Micro Relays Overview and Design Considerations
Authors: Thurai Vinay and Dinesh Sood Zuraini Dahari, 
Published: October 2018

Miniature electromagnetic relay matrices capable of switching currents up to one ampere range are widely used in commercial applications such as instrumentation and telecommunication. Traditionally these devices have been fabricated from a number of discrete components, however in recent years the emergence of Micro Electro Mechanical System (MEMS) technology has opened up the possibility for batch fabrication of microrelays at much reduced unit cost. While several electromagnetic microrelay designs have been successfully developed and commercialized for use as individual units, development work on electromagnetic microrelay matrices where individual relays can be selectively switched on and off have been fewer and less successful. Due to inherent limitations of the micromachining processes, significant dimensional and material property variations occur among individual relays in a matrix. These variations severely limit the tolerance window and hence the reliability of operation of the device. After reviewing existing designs of electromagnetic microrelays, a set of desirable design features that would make the electromagnetic microrelay more robust are identified. A novel design incorporating these features is proposed and preliminary results of ANSYS1 simulation studies are presented.Keywords: MEMS, microrelay and electromagnetic
Thermal Shock In Periodic Edge-Cracked Plate Supported By Elastic Foundation
Authors: A. Rizk Abd El-Fattah 
Published: October 2018

The study of the transient thermal stress problem for a periodic edge cracks in an elastic plate on an elastic foundations is investigated. This study may also be applied for circumferentially periodic cracked hollow cylinder under transient thermal stresses. Based on previous studies, the cylindrical shell may be modeled by a plate on an elastic foundation. The thermal stresses are generated due to sudden convective cooling on the boundary containing the edge cracks while the other boundary is insulated. The superposition technique is utilized to solve the problem. The perturbation problem is formulated by using the thermal stresses obtained from uncracked problem with opposite sign on the crack surfaces as the only external loading. This leads to hypersingular integral equation with the crack surface displacement as the only unknown function. The main output of this study is the transient stress intensity factors that are evaluated numerically. The parametric studies based on time (Fourier number), crack length, coefficient of heat transfer (Biot number), Periodic crack spacing and the stiffness of elastic foundation are investigated. Keywords: Fracture mechanics, Thermal stresses, Periodic crack, Stress intensity factor.
Discutindo gênero na escola: um relato de experiência
Authors: Andrade Augusto José Bezerra de , Dias Erika Carla De Sousa , Silva Rafael Tavares Silveira , Do Nascimento Ellany Gurgel Cosme 
Published: October 2018

Trata-se de um relato de experiência vivenciado pelos discentes da disciplina Estágio Curricular Supervisionado II, do Curso de Enfermagem da Universidade do Estado do Rio Grande do Norte (UERN), Campus Avançado Prof.ª Maria Elisa de Albuquerque Maia (CAMEAM) da cidade de Pau dos Ferros-RN. O relato teve como tema os papéis de gênero (masculino e feminino), realizado no primeiro semestre de 2017, com alunos da Escola Estadual Prof.ª Maria Edilma de Freitas em Pau dos Ferros-RN. Os escolares se envolveram nas atividades, demonstrando aproximação com a discussão. Observou-se que alguns refletiram sobre as discussões, mudando as concepções que expressavam a respeito dos papéis de gênero e adotando um discurso igualitário. Implementar foi relevante e contribuiu para a formação e desenvolvimento da prática docente no Ensino Fundamental.
A formação dos conceitos científicos na perspectiva da teoria-histórico-cultural: estudo teórico
Authors: Silva Thiago Guimarães da , Bortolanza Ana Maria Esteves 
Published: October 2018

Este artigo tem como finalidade apresentar um estudo teórico sobre a formação dos conceitos científicos (2016) em Vigotski (2010 e Leontiev (2004). Trata-se de uma pesquisa teórica (DAVIDOV, 1988) realizada por meio de uma investigação conceitual para sistematizar o processo de formação dos conceitos científicos em relação aos conceitos espontâneos. São discutidos os fundamentos teóricos da formação humana na perspectiva histórico-cultural, o papel da linguagem na apropriação dos conceitos científicos e o processo de formação dos conceitos científicos em relação aos conceitos espontâneos. As considerações finais apontam a importância da organização do trabalho educativo do professor para a formação dos conceitos científicos dos alunos tendo em vista o desenvolvimento integral. Cabe a escola situar-se na esfera complexa da atividade humana fazendo a ponte com os conhecimentos da atividade empírica na vida cotidiana. Nesse contexto, o papel do professor como organizador do trabalho educativo é essencial para o desenvolvimento integral de seus alunos.
Editorial
Authors: Resende Marilene Ribeiro 
Published: October 2018

É com imensa alegria que publicamos mais um número da Revista Profissão Docente, v. 18, n. 38. Algumas mudanças ocorreram. Neste ano, assume como editora responsável, a Profa. Dra Marilene Ribeiro Resende e parte da Comissão Editorial foi renovada, com a inclusão da Profa. Dra. Adriana Rodrigues e da Profa. Dra. Vania Maria de Oliveira Vieira, continuando a contar com a colaboração da Profa. Dra. Fernanda Telles Márques e do Prof. Dr. Gustavo Araújo Batista. Estamos de “cara” nova, com um novo layout e introduzindo o DOI para identificar os objetos da Revista.
Roundtable “Achievements and Prospects Synergetics Research in Domestic Humanities” (Taras Shevchenko National University of Kyiv, April 17, 2016)
Authors: Dobronravova Iryna , Gorbunova Lyudmyla 
Published: October 2018

Ukrainian Synergetics Society would celebrate its 15th anniversary in May, 2017. In preparation for this anniversary, some members of the Society, together with the Department of Philosophy and Methodology of Science Taras Shevchenko National University of Kyiv hold a specific roundtable during the InternationalScientific Conference “Days of Science at Faculty of Philosophy - 2016”, which was hold on April 20-21, 2016 at the red building of Kyiv Taras Shevchenko National University. The title of this roundtable was “Achievements and Prospects of synergetics research in domestic humanities.” The subject of discussion were the following topical issues: Synergetics as a transdisciplinary research project, Integration of complexity theory and theory of practices as the prospect of synergetics project development in social-humanitarian sphere, Post-nonclassical humanities as a movement to an anthropological complexity, Overcoming of dehumanization in human sciences, Using of synergetics methodology for study of public morality phenomenon, Methodological possibilities of synergetics in educational research practices, particularly in transformative adult education. Professor Iryna Dobronravova, President of the Society and Head of Department of Philosophy and Methodology of Science of Taras Shevchenko National University of Kyiv was moderated discussion during this roundtable.
Philosophy and Philosophical Education in Kazimierz Twardowski’s Interpretation
Authors: Honcharenko Olga 
Published: October 2018

Philosophy determination, its place and purpose in human life and society is the eternal philosophical problem. In this paper the reader is suggested to analyze the attempt of its solving by outstanding Polish philosopher Kazimierz Twardowski. Free from the extremes of metaphysics and minimalism, Kazimierz Twardowski’s philosophy has not only created the conditions for philosophical culture development, but has also brought up a pleiad of philosophically educated scientists. What are the peculiarities of Kazimierz Twardowski’s philosophy? On the bases of philosophical papers analysis, scientific and historical definition of the concept of philosophy has been carried out. It is proved, that the scientific concept of philosophy, as one of the components of polylogue manifestation of the human spirit, dissolves in historical concept of philosophy. Such philosophy understandingbrought the philosopher to the conclusion about vital human and social necessity in philosophy. If a man and society do not feel the necessity in philosophy, due to the lack of their spiritual culture, this necessity should be grown. Therefore, the care about philosophical education was one of the main goals of Twardowski’s life. The scientist interpreted philosophical education as a part of general education. He determined philosophy studies as a way of life and a school of thinking. Due to this, Twardowski believed that method studying as natural means of knowledge and self-cognition is a humane act promoting creating man’s own view of the world. Special understanding of the philosophy and the background of its development – philosophical education by talented scientist and teacher – encourages reflection on the problems in the field of Ukrainian philosophy. Philosophical and pedagogical understanding of Twardowski’s experience is relevant in the context of increasing complexity of modern relationships between a man and society.
Women, Education and Employment in Saudi Arabia: an Example of Multiple Modernities
Authors: Fadaak Talha , Roberts Ken 
Published: October 2018

This paper uses official statistics and previous research by Saudi scholars, but mainly our own evidence from 23 interviews during 2015 and 2016 with 25-35-year-old males and females, to explain why modernisation is Saudi Arabia, which includes the diversification of its economy and a huge expansion in higher education for males and females, is unlikely to lead to a higher proportion of women in the workforce. This is because the total number of jobs in the country is unlikely to increase, and opportunities for women are likely to remain limited not only by employers’ hiring preferences and practices but also by the limited range of jobs that young women and their families consider acceptable. Thus rather than following the same modernizing path as Western societies, Saudi Arabia will add to the examples of multiple modernities.
Treatment of Comminuted Intraarticular Fracture of Distal Radius with Arthroscopic Reposition of Fragments under External Fixation
Authors: Dubrov V. E. , Grechukhin D. A. , Maksimov B. I. , Shantrukov P. A. 
Published: October 2018

Introduction. Use of arthroscopically assisted reduction of bone fragments in comminuted intraarticular fractures of the distal radius (DR) remains ambiguous.The purpose of the study was to determine the expediency and efficacy of arthroscopy in surgical treatment of comminuted DR frac- tures especially under conditions of wrist joint (WJ) external fixation.Patients and methods. Sixty eight patients (mean age 38±14.1 years) with comminuted intraar- ticular DR fractures (type B3-C3 by AO/ASIF) were operated on. In 34 out of them arthroscopic support of osteosynthesis was used. Treatment results were assessed in 3, 6 and 12 months by DASH questioner, X-ray examination data, grip strength and range of motion in WJ.Results. It was stated that WJ arthroscopy improved the diagnosis of joint injuries (injury of tri- angular fibro-cartilage complex was diagnosed in 29 (83.5%), scapholunate ligament - in 12 (35.5%), lunotriquetral ligament - in 4 (11.8%) cases) and the quality of bone fragments reposition (displacement of intraarticular fragments over 1 mm after primary reposition was arthroscopically diagnosed in 21 (61.8%) cases, statistically significant improves the early postoperative (first 3 months after surgery, p<0.05) but did not affect the long term treatment results.
Russian Version of HSS Knee Replacement Expectations Survey: Language and Cultural Adaptation
Authors: Cherkasov M. A. , Ibiev A. S. , Saraev A. V. , Kornilov N. N. 
Published: October 2018

Purpose . To perform language and cultural adaptation of the Hospital of Special Surgery (HSS) Knee Replacement Expectations Survey and evaluate its reliability.Material and methods . To preserve the HSS validity its language and cultural adaptation was performed in several steps: (1) direct translation, (2) synthesis of the intermediate version, (3) back translation, (4) expert commission review and creation of the 2nd intermediate version, (5) pre-testing and formation of a final version, study of reliability with evaluation of Cronbach’s alpha and intra class correlation coefficient (ICC). Total number of 35 patients (mean age 54.2 years) with terminal-stage gonarthrosis who were admitted for total knee arthroplasty (TKA) participated in the study.Results . Cronbach’s alpha and intra class correlation coefficient (ICC) for the translated and adapted version of HSS Knee Replacement Expectations Survey made up 0.871 and 0.82 (95% confidence interval 0.725-0.897) that was indicative of high correlation between Russian version and the original.Conclusion . Russian version of HSS Knee Replacement Expectations Survey is a reliable tool and can be used for the evaluation of patient expectations prior to TKA.