Miracle-dz/UniFAR-FTUs huggingface dataset:
A finite element model to simulate magnetic field distribution and laboratory studies in wet low-intensity magnetic separator

Low-intensity magnetic separators are widely used in the research works and the industry. Advancement in the magnetic separation techniques has led to an expansion in the application of this method in different fields such as enrichment of magnetic mineral, wastewater treatment, and medicine transfer in the human body. In the mineral processing industry, the main application of wet magnetic separation is via drum separators. The design of this separator is based on drum rotation inside a tank media, where a permanent magnet placed inside the drum as an angle form produces a magnetic field. In the present work, the magnetic variables involved (magnetic flux density, intensity of magnetic field, and gradient of magnetic field intensity) were simulated in the drum wet low-intensity magnetic separator using the finite element method and a COMSOL Multiphysics simulator; these variables were further validated through the measured data. A comparison between the simulation and laboratory measurements (of the magnetic field) showed that the mean value of the simulation error in 94 points in 2 sections was equal to 9.6%. Furthermore, the maximum simulation error in the middle of the magnets, as the most important part of the magnetic field distribution in the process of magnetic separation, was in the 6th direction and equal to 7.8%. Therefore, the performed simulation can be applied as a first step to design and construct more advanced magnetics separators.
Concurrent Design of Reconfigurable Robots using a Robotic Hardware-in-the-loop Simulation

This thesis discusses a practical approach to the concurrent analysis and synthesis of reconfigurable robot manipulators, which is based on the alternative design methodology of Linguistic Mechatronics (LM) as well as the utilization of a modular Robotic Hardware-in-the-loop Simulation (RHILS) platform. Linguistic Mechatronics is a systematic design methodology for mechatronic systems, which formalizes subjective notions and simplifies the optimization process, in the hope that communication between designers with various backgrounds and clients is enhanced and numerous design variables with different natures can be considered concurrently. The methodology redefines the ultimate goal of design based on the qualitative notions of wish and must satisfactions, and formalizes the effect of designer's subjective attitude in the process, which can be adjusted based on the reality of system performance. The underlying concepts of LM is investigated through a simulation case study. In addition, the RHILS platform involves physical joint modules and the control unit to reduce modeling complexities while taking into account various physical phenomena. This platform is employed to the design architecture in order to evaluate the design attributes during a design process. Ultimately, the new approach is applied to redesigning kinematic, dynamic and control parameters of an industrial manipulator. iii Acknowledgments
Capacity optimization with discrete multitone modulation for indoor optical wireless communication system

Citation for published version (APA): Oh, C. W. , Bech, M. , Mekonnen, K. , Tangdiongga, E. , & Koonen, T. (2015). Capacity optimization with discrete multitone modulation for indoor optical wireless communication system. In P. Kockaert, P. Emplit, S-P. Gorza, & S. Massar (Eds.), Proceedings of the 20th Annual Symposium of the IEEE Photonics Benelux Chapter, 26-27 November 2015, Brussels, Belgium (pp. 233-236). [P2.17. ] Brussels: OPERA-photonics, Brussels School of Engineering.
Characterisation and growth of polar MgO(111) thin films prepared by Molecular Beam Epitaxy

Magnesium oxide MgO has developed research interest for its use in electronic and spin electronic device applications. Examples of these devices are power MOSFETs and spinFETs. Power MOSFET devices have been developed with silica gates on SiC substrates, however dielectric properties of silica and extreme operating and processing conditions of SiC based devices present problems with electrical properties of such devices. The dielectric properties of MgO make it an ideal replacement for silica in power MOSFET devices with Silicon Carbide. These properties in combination with high tunneling magneto resistances recorded for magnetic tunneling junctions using MgO suggest that MgO/SiC hetero-junctions could also be applicable to the field of semiconductor spintronics and spinFET devices. The polar structure of MgO has been of research interest for many years. The aims of this work are to understand the electronic structure at the interface for prospective device applications and to understand the impact of the polar structure on MBE grown MgO(111) thin films. The results presented in this work show successful growth of polar MgO(111) thin films prepared by MBE confirmed by analysis of the thin films using surface electron diffraction, XPS, TEM and STEM techniques. Preparation of flat 6h-SiC(0001) by hydrogen cleaning in UHV is demonstrated herein, resulting in a clean template for subsequent MgO(111) growth. Successful growth of MgO(111) films as thin as a few nanometres has also been demonstrated. Structural characterisation of these films has been performed using RHEED and STEM and the electronic band alignment at the interface of MgO thin films with 6h-SiC(0001) has also been measured by XPS. This work also resolves discrepancies in the valence band offset reported in the literature, which have been clarified using STEM and CASTEP simulations.
The cost of parallel processing in the human visual system

Our environment is visually rich, containing a multitude of objects that can be defined by many different features, e.g. shape, colour, and motion. To navigate and interact with the environment, we must process this information efficiently. The human visual system can process information either serially or in parallel. While there is a clear timesaving benefit of parallel processing, its cost is less well understood. Consequently, the aim of this thesis is to address three key theoretical questions underlying the cost of parallel processing. The first aim was to determine how the capacity of parallel processing varies as a function of the detail of information extraction. Previous research has demonstrated that brief presentations of five and six motion signals can be differentiated; this suggests that up to five signals can be simultaneously processed. However, it is unclear how much information is being extracted, i.e. whether observers are extracting direction information from all five signals. To examine this we presented observers with multiple moving objects and evaluated their parallel processing capacity as a function of the information required to perform the task. We found that the resolution of parallel motion processing varies as a function of the information that is extracted; specifically, as information extraction becomes more detailed, the capacity to process multiple signals is reduced. The second aim was to investigate whether there is a cost to the fidelity of information that is processed in parallel. Previous research suggests that there may not be a cost associated with parallel consolidation of information from sensory to visual shortterm memory (VSTM). Here we examined this by first determining that motion direction, and possibly orientation, can be consolidated in parallel, then explicitly evaluating the cost to the fidelity of information consolidated in parallel, compared to serially. We found that there is a twofold cost associated with parallel consolidation: a reduction in resolution of encoded items due to spreading of spatial attention, and an increase in the likelihood of consolidation failure due to interference between items. The third aim was to examine whether the cost associated with parallel processing can ultimately explain its capacity. We extended our previous findings regarding the cost associated with parallel consolidation to examine whether the capacity of parallel consolidation results from biased competition, the same mechanism proposed to account for spatial attention and VSTM storage, as evidenced from the interference between items presented simultaneously. This was achieved by demonstrating that parallel consolidation performance is influenced by factors…
Selective laser melting and post-processing for lightweight metallic optical components

3 ACKNOWLEDGEMENT . 6 CONTENTS . 8 LIST OF FIGURES . 12 LIST OF TABLES . 19 Chapter 1 : Introduction . 21 1.1 Background . 21 1.1.1 Selective Laser Melting of Al alloys . 23 1.1.2 Post-processing treatment of As-built Al alloys . 25 1.1. 3 Fabrication of Metallic Optics . 29 1.2 Motivation and Research Objective . 31 References . 40 Chapter 2 : Effect of SLM process parameters on the quality of Al Alloy parts . 46 2.1 Effect of Selective Laser Melting Process Parameters on the Quality of Al Alloy Parts: Powder Characterization, Density, Surface Roughness, and Dimensional Accuracy . 28 Abstract:. 48.48 2.1.
Profile of phytochemistry and antioxidant activity of sorrel in function of organic fertilization and density of plantio

The revival of non-conventional edible plants enables important gains in nutritional, social, cultural, economic, and environmental points of view. Among them, sorrel — Rumex acetosa L. — has been deemed pleasant by consumers due to its acid taste. As we do not have a lot of phytotechnical and nutritional information about this plant, the objective was to assess the influence of different spacing sets and cattle manure dosages on their physical-chemical characteristics and bioactive compounds content with antioxidant action. Randomized blocks with four repetitions was chosen as experimental design, using a scheme of subdivided plots, with five dosages of weather-beaten cattle manure in the plots and two sets of spacing in the subplots. Data was submitted to a variance analysis with two factors (two-way ANOVA). It was not verified any significant effect (P>0.05) in the interaction Dosage x Spacing. Fertilization dosages and spacing sets did not have any effect on color and total soluble solids average contents, humidity, titratable acidity, and phenolic compounds. Increasing dosages of organic fertilizer, up to 75 kg ha, reduced the plant’s pH; above that amount, pH rose. Presence of anthocyanins and vitamin C was not detected. The total carotenoids average content was not influenced by the manure factor, and the plant presented greater total carotenoids content in the smallest spacing. Antioxidant activity [1.0 mg mL], although inferior to the standards that were used (BHT, vitamin C and quercetin), was quite representative. A conclusion was reached that fertilizing with weather-beaten cattle manure had an effect only on pH, and cropping spacing had an influence only on carotenoids content. Other phytochemicals and physical-chemical characteristics were not influenced in sorrel plants with different levels of fertilization and sets of spacing.
Fabrication and Characterization of a Magnetohydrodynamic Micropump from Polydimethylsiloxane (PDMS)

Weber, Rachel K. M.S.Ch.E. Rose-Hulman Institute of Technology August 2018 Fabrication and Characterization of a Magnetohydrodynamic Micropump from Polydimethylsiloxane (PDMS) Thesis Advisor: Dr. Daniel Anastasio Microfluidics is a growing area of study in recent years, particularly for lab-on-a-chip applications. Fluids must oftentimes be transported from one location on the chip to another. This study focuses on the fabrication and characterization of a magnetohydrodynamic micropump. The device was fabricated in the Rose-Hulman Institute of Technology MiNDS facility, and consisted of a PDMS channel and titanium electrodes supported on a glass slide with a permanent magnet. An Arduino microcontroller capable of pulse width modulation (PWM) was used to control the electrical potential. An electrode design that spanned the full length of the channel was successful in driving fluid motion. Erioglaucine disodium salt blue dye was used to track the fluid motion through the channel, and appeared to have a greater impact on the apparent fluid velocity than sodium chloride. Of the PWM duty cycles tested, 75% had the highest apparent fluid velocity. The titanium that contacted the fluid anodized, indicating it is best suited for disposable applications.
Effect of water content on hydraulic properties of bentonite–geomaterials mixture

Abstract This article examines the effect of water content on hydraulic properties of bentonite–geomaterials mixture. The relationship between the initial water content, matric suction and hydraulic conductivity (saturated and unsaturated) and the soil–water characteristic curve were controlled established during a laboratory test. Three materials were used during this study: bentonite and two types of geomaterials . First, the mixture of 10% bentonite–20% calcareous sand–70% tuff was selected on the basis of the minimum saturated hydraulic conductivity (k sat) . The results showed that the effect of the initial variation in water content from 12.35% to 16.35% does not make a difference in the k sat values; the values are between 10−8 and 10−11 m/s. Then, the effect of the initial water content on the soil–water characteristic curve was studied using suction control methods. The soil–water characteristic curves showed that the air entry value (AEV) increases with decreasing initial water content The unsaturated hydraulic conductivity (k w) study with different initial water content was measured with an original vapour equilibrium technique (VET). The results showed that the k w varied between 3 × 10−17 and 4 × 10−15 m/s in all cases of initial water . In addition, the Van Genuchten hydraulic conductivity model is compared to the experimental results. Finally, the effect of the initial water content on the saturated and unsaturated hydraulic conductivity of this mixture is not apparent for the much lower (Sr > 80%, k = k sat) and very high suction values, respectively.
Control Modes of Solid State Transformer and Black Start Functionality.

RAMACHANDRAN, VIVEK. Control Modes of Solid State Transformer and Black Start Functionality. (Under the direction of Dr.Subhashish Bhattacharya). The Solid State Transformer (SST) enables intelligent integration of renewable resources with the grid. Three different modes of SST operation are discussed in this thesis. A previous study, did a preliminary investigation of the black start capabilities of the SST. In addition a current controlled inverter mode of operation SST is discussed in this thesis. This thesis further investigates the control structures and validates them through PSCAD simulations. This thesis also focuses on fine tuning existing average models to replicate their switching counterparts and also discusses and validates control modifications required for successful grid integration. A 3 phase test system comprised of Substation SSTs and load SSTs of different ratings has been developed and validated in PSCAD. The SST’s response under fault conditions and its ability to integrate distributed resources in a seamless manner are shown. In addition other features such as the SST’s internal over-current and overvoltage protection and its ride through capabilities are validated and discussed. © Copyright 2014 by Vivek Ramachandran
Research on face recognition method based on PCA

Principal component analysis (PCA) is one of the most widely used face feature extraction methods, and has evolved a lot of new algorithms, which has become a hot research topic. It is a multivariate statistical method, can effectively reduce the dimension of the face image, and can keep the original data of most of the major information, has been widely used in the field of pattern recognition and computer vision. This paper introduces the basic principles of PCA, as well as the improved PCA algorithm, and finally the simulation experiments are carried out.
Fictitious electric conductivity modelling of eddy current evaluation of magnetic materials

ABSTRACT This paper presents a new modeling approach of eddy current nondestructive evaluation systems containing magnetic materials. Originally, the proposed model is based on coupled circuits principle and the notion of equivalent current density. In order to make the model homogenous, we consider the current density as a state variable since this density is compatible with the representation of the magnetisation by equivalent currents. By introducing the fictitious electric conductivity approach, the sensor impedance is expressed according to magnetic tube or plate characteristics such as electric conductivity and magnetic permeability. An excellent concordance is achieved by comparing the calculated results to those of analytical ones. Regarding the mesh simplicity and the fast calculation, this method is very adapted for the resolution of the inverse problems for real time evaluation of the properties of magnetic materials.
Effects of surface topography and vibrations on wetting: Superhydrophobicity, icephobicity and corrosion resistance

ii TABLE OF CONTENTS . vii LIST OF FIGURES . xii LIST OF TABLES . xvii LIST OF ABBREVIATIONS . xviii ACKNOWLEDGMENTS . xix CHAPTER 1: INTRODUCTION . 1 1.1 Objectives of the Dissertation . 3 1.2 Organization of the Dissertation . 5 CHAPTER 2: CONCEPTS OF WETTING AND VIBRATIONAL MECHANICS . 8 2.1 Contact Angle and Models of Wetting . 8 2.2 Contact Angle Hysteresis . 11 2.3 Superhydrophobicity and Biomimetic Self-Cleaning Surfaces . 14 2.4 Geometric Interpretation of the Surface Tension at Equilibrium . 16 2.5 Separation of Motions and Effective Forces . 20 2.6 Vibrational Mechanics . 24 2.7 Conclusion . 25 2.8 References . 25 CHAPTER 3: EFFECTS OF VIBRATIONS AND SPATIAL MICRO/NANO PATTERNS ON EQUILIBRIUM, WETTING, FLOW AND PHASE TRANSITION . 30 3.1 Effective Force Corresponding to Small Fast Vibrations . 30 3.1.1 Inverted pendulum and vibro-levitation. 31 3.1.2 Mathieu equation method . 34 viii 3.1. 3 Multiple pendulums and the so-called “Indian rope trick” . 36 3.1. 4 Experimental . 41 3.1. 5 Results and discussion . 41 3.2 Vibro-Levitation of Droplets . 44 3.2.1 Vibro-levitating droplets and inverted pendulum . 46 3.2.2 Experimental . 49 3.2.3 Results . 50 3.3 Vibration-Induced Phase Transition and Locomotion . 51 3.3.1 Effective freezing . 52 3.3.2 Cornstarch monsters. 52 3.3.3 Effective liquid properties and surface tension of granular materials . 54 3.3.4 Locomotion in viscous liquid. 56 3.4 Effect of the Surface Texture on Stability and Phase Transitions . 57 3.4. 1 Kirchhoff’s analogy between spatial and temporal patterns . 57 3.4. 2 Surface patterns leading to the superhydrophobicity, phase transition and propulsion62 3.5 Effect of the Patterns on Fluid Flow Through Membranes . 66 3.5. 1 Water penetration through a hole in a vibrating vessel . 66 3.5. 2 Liquid penetration through pores in vibrating or patterned membranes . 69 3.6 Conclusion . 76 3.7 References . 78 CHAPTER 4: DYNAMICS OF INCOMING DROPLETS ON TEXTURED HYDROPHOBIC CONCRETE . 83 4.
Review on Language Translator Using Quantum Neural Network (QNN)

This paper presents machine translation based on machine learning, which learns the semantically correct corpus. The machine learning process based on Quantum Neural Network (QNN) is used to recognizing the corpus pattern in realistic way. It translates on the basis of knowledge gained during learning by entering pair of sentences from source to target language. By taking help of this training data it translates the given text. own text.The paper consist study of a machine translation system which converts source language to target language using quantum neural network. Rather than comparing words semantically QNN compares numerical tags which is faster and accurate. In this tagger tags the part of sentences discretely which helps to map bilingual sentences.
PREVALENCE OF INTERNET USAGE AND ACADEMIC PURPOSE AMONG PRE-DEGREE STUDENT: A CASE STUDY

Learning environment in 21st century has changed dramatically with the advancement in technology. Wired or wireless access to the Internet provides opportunity to the user to search, explore, retrieves information or application such as social networks, online games, tutorials, notes and many more. Nowadays, students learning process is not only limited to textbook, lecturing session or meeting with lecturers. With wider access to Internet, they are able to access and update their knowledge and information, downloading notes, communicate and completing their assignment or homework beyond conservative approach. Therefore, the objective of this paper is to explore the effect of Internet towards academic purposes among pre-degree students in UiTM, Puncak Alam. A case study has been conducted towards 399 pre-degree students. Data were analyzed quantitatively by using SPSS software package for descriptive statistics and correlation method. From the analysis, it revealed that pre-degree students are an excessive user towards Internet for their academic purpose, yet level of Internet addiction in general shows that they are mild user. Field of Research: Internet usage, Internet addiction, academic purpose, and pre-degree students.
Taxonomy of novel abstracts based on empirical findings

This paper examines the content description of fictional works, specifically novels. The data for the empirical part of the study was gathered in Finnish public libraries. The aim of the study is to find out how library clients and library professionals of public libraries describe novels by abstracting them - what are differences in their characterisations and what are the similarities between their abstracts. Also, a taxonomy of novel abstracts is given. The abstracts are classified into four categories in the taxonomy: plot or thematic abstracts, cultural-historical abstracts, subjective or personal abstracts and critical abstracts. In the final portion of the paper, a model for a search and retrieval system for fiction is presented.
Evaluation of Catalytic Effects of Metal Oxide Nanoparticles on Pyrolysis of Used Lubricating Oil

Pyrolysis is an applicable method that has been widely used to recover hydrocarbons from Used Lubricating Oil (ULO). However, large-scale application of this approach has been limited by its noticeably energy and time consuming nature. In the present research, it has been attempted to modify the energy and time requirements of ULO pyrolysis using the catalytic effects of metal oxide nanoparticles (NPs). The impacts of γ-Al2O3, γ-Fe2O3 and ZnO NPs on the kinetic features of ULO pyrolysis were studied using thermogravimetric analysis (TGA). The kinetic parameters of the pyrolysis process were calculated based on Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozava (FWO) models. The activation energy of virgin ULO pyrolysis had been calculated to be 161.505 and 162.087 kJ/mol using KAS and FWO models, respectively. However, in the present work, utilization of γ-Fe2O3 NPs significantly reduced the activation energy of ULO pyrolysis to 133.511 and 138.289 kJ/mol through KAS and FWO models, respectively. The catalytic effect of ZnO NPs was not as noticeable as that of γ-Fe2O3 NPs, resulting in activation energies of 155.568 and 158.501 kJ/mol using KAS and FWO models, respectively. Moreover, based on the results of this study, γ-Al2O3 NPs had no significant impact on the kinetics of ULO pyrolysis.