Modelling detection of magnetic hysteresis properties with a microcontroller

Omigbodun, Francis T.; Oladapo, Bankole I.; Bowoto, Oluwole K.; Adeyekun, Funso

doi:10.14445/22315381/ijett-v67i6p202

Cited by 14 publications

(13 citation statements)

References 11 publications

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“…However, contradictory results that questioned the interaction between PEEK and osteoblastic differentiation have also been reported [24]. For example, PEEK implants formed bone in vitro that was comparable to that from coarse titanium [25].…”

Section: Introductionmentioning

confidence: 99%

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3D printing of PEEK–cHAp scaffold for medical bone implant

et al. 2020

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The major drawback associated with PEEK implants is their biologically inert surface, which caused unsatisfactory cellular response and poor adhesion between the implants and surrounding soft tissues against proper bone growth. In this study, polyetheretherketone (PEEK) was incorporated with Calcium Hydroxyapatite (cHAp) to fabricate a PEEK/cHAp biocomposite, using the fused deposition modeling (FDM) method and a surface treatment strategy to create microporous architectures onto the filaments of PEEK lattice scaffold. Also, nanostructure and morphological tests of the PEEK-cHAp biocomposite were modeled and analyzed on the FDM-printed PEEK-cHAp biocomposite sample to evaluate its mechanical and thermal strengths as well as in vitro cytotoxicity via a scanning electron microscope (SEM). A technique was used innovatively to create and investigate the porous nanostructure of the PEEK with controlled pore size and distribution to promote cell penetration and biological integration of the PEEK-cHAp into the tissue. In vivo tests demonstrated that the surface-treated micropores facilitated the adhesion of newly regenerated soft tissues to form tight implant-tissue interfacial bonding between the cHAp and PEEK. The results of the cell culture depicted that PEEK/HAp exhibited better cell proliferation attachment spreading and higher alkaline phosphatase activity than PEEK alone. Apatite islands formed on the PEEK/HAp composite after immersion in simulated body fluid of Dulbecco's Modified Eagle Medium (DMEM) for 14 days and grew continuously with more or extended periods. The microstructure treatment of the crystallinity of PEEK was comparatively and significantly different from the PEEK-cHAp sample, indicating a better treatment of PEEK/cHAp. The in vitro results obtained from the PEEK-cHAp biocomposite material showed its biodegradability and performance suitability for bone implants. This study has potential applications in the field of biomedical engineering to strengthen the conceptual knowledge of FDM and medical implants fabricated from PEEK-cHAp biocomposite materials.

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Section: Introductionmentioning

confidence: 99%

“…Moving forward, it was reported that osteoblasts were less different in the case of PEEK than on titanium surfaces [25,26]. As the titanium-PEEK compound allowed a better osteoblastic differentiation than the PEEK itself, a possible PEEK-Halo effect was present [27,28].…”

Section: Introductionmentioning

confidence: 99%

3D printing of PEEK–cHAp scaffold for medical bone implant

et al. 2020

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“…Similarly, this was demonstrated in the diametral tensile strength of the PLA diameter, as reported by various studies on carbonated hydroxyapatite (cHA) [16][17][18]. The sizes of ceramic particles can be used to adjust the mechanical properties of the compounds: HA nanoparticles.…”

Section: Introductionmentioning

confidence: 62%

3D printing and morphological characterisation of polymeric composite scaffolds

Oladapo

Ismail

Zahedi

et al. 2020

Engineering Structures

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3D-printing is an efficient method of designing customised structures and producing synthetic bone grafts appropriate for bone implants. This research aimed to manufacture a new multi-functionalised 3D-printed poly(lactic acid)/carbonated hydroxyapatite (PLA/cHA) scaffolds with mass proportions of 100/0, 95/5 and 90/10 in a bid to verify their potential application in tissue regeneration. The filaments of these hybrid materials were obtained by extrusion technique and subsequently used to manufacture the 3D-printed scaffolds, using a fused deposition modelling (FDM) technique. The scaffolds were characterised based on their thermal properties, microstructure and geometry by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS), respectively, in addition to determination of their apparent porosities. The degradation of the scaffolds and the liberation of degradation products were evaluated in in vitro for different days under simulated physiological conditions. New microanalyses of mechanical behaviour of the materials: tensile and compression stresses, density, frequency analysis and optimisation with DSC were performed. While, evaluation of the surface luminance structure and the profile structure of the nanostructured PLA composite materials was done by SEM, in 3D printed form. The filter profile of cross-sectional view of the specimen was extracted and evaluated with Firestone curve of the Gaussian filter; checking the roughness and waviness profile of the structure. It was observed that the thermal properties of the composites were not affected by the manufacturing process. The microstructural analysis showed the effective incorporation of the ceramic filler in the polymer matrix as well as an acceptable PLA/cHA interaction. The degradation tests showed the presence of calcium and phosphorus in the studied medium, confirming their liberation from the composites during the incubation periods.

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“…Also, the board contains the clock of the microcontroller and a variable number of ports, with which can connect the pins of the microcontroller chip depending on the task with the outside world. The Arduino software environment, also known as an "integrated development environment", allows you to write code (called "sketches" in the Arduino community), implement the controller, download the code to the Arduino board, and re-read the code Information from the Arduino Map of ''digital Write'' and ''digital Read'' [12,13]. It can collect entries, for example, the heat of a body and conversion to output.…”

Section: Methodology a Microcontroller And Software Environmentmentioning

confidence: 99%

Model Design of Low-Pass Filter of Integrated Pulse Width Modulation for Aircraft System Optimization

Omigbodun¹

2019

IJRASET

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Aircraft system optimization control lead to less fuel consumption and operation costs, among other benefits. A novel Arduino based prototype of an Aerospace system that takes in an analogue signal of a variable frequency and zero voltage to produces an analogue output via pulse width modulation (PWM) was design. A suitable RC circuit which performs a low-pass digital filter with a cutoff frequency of 70Hz, with no attenuation of the signal should occur for the frequencies of 70Hz was model. The transfer region from 70Hz to 85Hz and output has no significant amplitude for input with frequency over 85Hz. This research also entails the electronic model design of the hardware for the prototype together with the MATLAB code that was used to design and calculate the filter and the source of the software that was used for the Arduino C code. The behaviour of the hardware design was proposed, assuming a "Blackbox" abstraction only for the Arduino board that was used. A detailed description of the MATLAB code and frequency response diagram that is produce using filter design. Also, a detailed description of the behaviour and semantics of the Arduino C code was used for the fueling, control module, communication and the vibration system of aircraft application. The images of the system working for different input signals of aircraft for frequencies in the pass-band, transfer region and the stop-band of the filter used for aircraft control.

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Modelling detection of magnetic hysteresis properties with a microcontroller

Cited by 14 publications

References 11 publications

3D printing of PEEK–cHAp scaffold for medical bone implant

3D printing of PEEK–cHAp scaffold for medical bone implant

3D printing and morphological characterisation of polymeric composite scaffolds

Model Design of Low-Pass Filter of Integrated Pulse Width Modulation for Aircraft System Optimization

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