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Encapsulation of C. odorata extracts for antimicrobial activity

Journal of Physics: Conference Series 2019年第1期1372卷

作者： Siti Nur Amylina Azmi Che Wan Sharifah Robiah Mohamad Khairul Farihan Kasim Biomedical Electronic Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis 02600 Arau Perlis School of Bioprocess Engineering Universiti Malaysia Perlis 01000 Jejawi Perlis

The purpose of this study is to investigate the relationship between the methycellulose (MC) and ethylcellulose (EC) of encapsulated C. odorata extracts (methanol and ethanol) and their antimicrobial properties against E. coli and Staphylococcus aureus. The encapsulated of C. odorata extract was prepared by solvent displacement method through dialysis tube cellulose membrane and it was freeze-dried to obtain the suspension of encapsulated C. odorata extract. Then, antimicrobial properties of encapsulated C. odorata extracts was performed by broth dilution method on target bacteria. A few drops of hydrochloric acid (HCl) were added into growth media until pH 4 to mimic the acidic conditions in human stomach. The results showed the encapsulated methylcellulose of methanol extract (MC-M) inhibit both bacteria types.

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Low Threshold Bound State in the Continuum Lasers in Hybrid Lattice Resonance Metasurfaces

arXiv

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arXiv 2020年

作者： Yang, Jhen-Hong Maksimov, Dmitrii N. Huang, Zhen-Ting Pankin, Pavel S. Timofeev, Ivan V. Hong, Kuo-Bing Li, Heng Chen, Jia-Wei Hsu, Chu-Yuan Liu, Yi-Yun Lu, Tien-Chang Lin, Tzy-Rong Yang, Chan-Shan Chen, Kuo-Ping Institute of Photonic System College of Photonics National Chiao-Tung University Tainan71150 Taiwan Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk660036 Russia Siberian Federal University Krasnoyarsk660041 Russia Department of Photonics College of Electrical and Computer Engineering National Chiao-Tung University Hsinchu30010 Taiwan Institute of Lighting and Energy Photonics College of Photonics National Chiao-Tung University Tainan71150 Taiwan Department of Mechanical and Mechatronic Engineering National Taiwan Ocean University Keelung20224 Taiwan Institute and Undergraduate Program of Electro-Optical Engineering National Taiwan Normal University Taipei11677 Taiwan Micro/Nano Device Inspection and Research Center National Taiwan Normal University Taipei106 Taiwan Institute of Imaging and Biomedical Photonics College of Photonics National Chiao-Tung University Tainan71150 Taiwan

Bound states in the continuum (BICs) have attracted much attention in recent years due to the infinite quality factor (Q-factor) resonance and extremely localized field. In this study, BICs have been demonstrated by dielectric metasurfaces with hybrid surface lattice resonance (SLR) in the experiment. By breaking the symmetry of geometry, SLR can be easily switched between BICs and quasi-BICs. Comparing with literature, switching between BICs and quasi-BICs is usually accompanied by wavelength shift. Here, a design rule is proposed to prevent the wavelength shift when the Q-factor is changing. Also, such a design also makes subsequent identification of the laser threshold more credible. Due to the high Q-factor, low threshold laser is one of the intuitive applications of BICs. Utilize the high localized ability of BICs, low threshold BICs laser can be achieved by the dielectric metasurface immersed with Rhodamine 6G. Interestingly, due to the high Q-factor resonance of BICs, the laser signals and images can be observed in almost transparent samples. Not only the BICs laser is demonstrated in the experiment, but also the mechanism of BICs is deeply analyzed. This study can help readers better understand this novel feature of BICs, and provide the way for engineer BICs metasurfaces. The device can provide various applications, including laser, optical sensing, non-linear optics enhancement, and single-photon source. Copyright © 2020, The Authors. All rights reserved.

关键词： Silicon nitride

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The Optimization of the Hydroxyapatite (HA) Material Characteristics Produced From Corbiculacea (Etok) Shells

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Journal of Physics: Conference Series 2019年第1期1372卷

作者： Mohd Riza Roslan Nashrul Fazli Mohd Nasir Mohd Farid Abdul Khalid Nur Farahiyah Mohammad Cheng Ee Meng Nor Nabielah Nazihah Hashim Beh Chong You Mohd Shukry Abd. Majid Nasrul Amri Mohd Amin School of Mechatronic Engineering Universiti Malaysia Perlis Kampus Pauh Putra 02600 Arau Perlis Malaysia Microwave Research Institute (MRI) Universiti Teknologi MARA 40450 Shah Alam Selangor Mechanical Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis Perlis Malaysia

Hydroxyapatite commonly used in medical field for tissue disease, bone disease, drug delivery and also for non-medical field purpose such as wastewater treatment. Due to excellent biocompatibility and bioactive properties, hydroxyapatite (HA) which is a group of calcium phosphate (CaP) and similar to the natural bone composition has been broadly ventured in medical area. Synthesising the HA was done via precipitation method by implementing the Corbiculacea (Etok) shells as the resource of calcium precursors. Calcination of Corbiculacea (Etok) shells took place to convert calcium carbonate (CaCO3 ) to calcium oxide (CaO). CaO were then reacted with water to form calcium hydroxide (Ca(OH)2) and later, reacted with phosphoric acid(H 3 PO 4). This experiment manipulated the CaP ratio to study the properties HA formed. CaP ratios used are 1.50, 1.67 and 2.00. The characterization were performed using Energy Dispersive X-Ray Spectroscopy (EDS), Scanning Electron Microscopy (SEM) and Fourier Transformation Infrared (FTIR).

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The study of monosodium glutamate application as a cross linker in tissue scaffold application

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AIP Conference Proceedings 2020年第1期2213卷

作者： N. F. Mohd Nasir M. Riza Roslan E. M. Cheng T. N. S. Zulaini M. F. Abdul Khalid W. A. Mustafa N. Z. Noriman Omar S. Dahham 1Microwave Research Institute (MRI) Universiti Teknologi Mara Shah Alam Malaysia 2Biomedical Electronic Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis Perlis Malaysia 3Faculty of Engineering Technology Universiti Malaysia Perlis 02600 Padang Besar Perlis Malaysia 4Center of Excellence Geopolymer and Green Technology (CEGeoGTech) Faculty of Engineering Technology (FETech) Universiti Malaysia Perlis (UniMAP) 02100 Perlis Malaysia

Tissue engineering, especially in bone scaffolds, significantly demands to act as the replacement for the defection of bone. Cross linker in the fabrication of scaffold plays a major role to optimize the connection between the pores. In this study, four different scaffolds of the concentration of crosslinker were fabricated using Monosodium Glutamate (MSG). The fixed ratio of HA: starch: 40: 60, was used in the fabrication of the scaffold. The concentration of the MSG were varied into 0%, 10%, 20% and 30%. Solvent – casting and salt leaching was used as scaffold fabrication technique. The scaffold’s mechanical and the morphological properties were characterized by mechanical testing and water adsorption test. Scaffold with 10% concentration of MSG as a crosslinking agent shows the highest mechanical properties and the lowest in the water adsorption test, therefore, further study should be made to investigate the biochemistry reaction which happened at this percentage which shows the best crosslinking affect among all.

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The Dielectric Characterization of Tapioca Starch – Ha Tissue Scaffold

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IOP Conference Series: Materials Science and engineering 2020年第1期864卷

作者： Nashrul Fazli Mohd Nasir Cheng Ee Meng Nurathirah Jamal Mohd Riza Mohd Roslan Nur Aerina Fitri Mohd Hoři Beh Chong You Muzammil Jusoh Mokhzaini Azizan Mohd Zakimi Zakaria Mohd Farid Abdul Khalid Biomedical Electronic Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis Kampus Pauh Putra Perlis Malaysia BioElectromagnetics Research Group School of Computer and Communication Engineering Universiti Malaysia Perlis Main Campus Pauh Putra Perlis Malaysia School of Electrical Engineering Universiti Malaysia Perlis Kampus Pauh Putra Perlis Malaysia School of Manufacturing Engineering Universiti Malaysia Perlis Kampus Pauh Putra Perlis Malaysia Microwave Research Institute (MRI) Universiti Teknologi Mara Shah Alam Malaysia

Tapioca starch-hydroxyapatite (HA) composites scaffold was fabricated using solvent casting and particulate leaching. The solvent casting involved the casting of polymer while particulate leaching involved the removal of porogen agent. The percentage of tapioca starch used were 50%, 60%, 70%, 80% and 90%, with the percentages of hydroxyapatite (HA) were set as 50%, 40%, 30%, 20% and 10% respectively. Here, sodium chloride was used as a porogen agent. SEM analysis was conducted to determine the micro structural of the scaffold surface. Based on the results, the pore size of composite scaffold is between ranges of 198 µm to 786 µm. For the dielectric study, the dielectric constants (D') and dielectric loss factor (D') over frequency range from 12.4 GHz to 18.0 GHz were obtained by transmission line method. Based on the result, both dielectric constant (s') and dielectric loss factor (s') was declined with the increment of the frequency.

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Scan matching and KNN classification for mobile robot localisation algorithm 3

Scan matching and KNN classification for mobile robot locali...

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3rd IEEE International Symposium in Robotics and Manufacturing Automation, ROMA 2017

作者： Markom, M.A. Adom, A.H. Shukor, S. A. Abdul Rahim, N. Abdul Tan, E. S. Mohd Muslim Irawan, A. School of Mechatronic Engineering Universiti Malaysia Perlis Ulu Pauh Perlis02700 Malaysia Program Diploma Studies Center Universiti Malasyia Perlis Kampus Uniciti Alam Sungai Chucuh Padang Besar Perlis02100 Malaysia Group Faculty of Electrical and Electronics Engineering Universiti Malaysia Pahang Pahang Malaysia

ISBN: (纸本)9781538625392

Mobile robots have made tremendous impact in our modern lives today, and its development is set to continue further. One of the most important domains to allow the interaction of mobile robots with human is its ability to know where it is in its environment, and how to navigate through it. This ability, however, needs algorithm has become more complex and requires high computational ability due to the demand for high accuracy, real time implementations and multi-tasking requirements. These are partly due to the need of multi-sensory system. This paper presents the use of single laser range finder for the mobile robot mapping and localisation system. The localisation algorithm is developed using scan matching method which is incorporated with K-nearest neighbours (KNN) classification. The mobile robot and the developed algorithm are tested in static environment. The results of the location estimation are able to achieve 80% of accuracy for each scan location with the distance range of ±2cm compared to the real location. As conclusion, the simple flow of the algorithm is suitable to replace the complex and high computational algorithm and system. © 2017 IEEE.

关键词： Mobile robots

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Challenges in using the Physics-of-Failure approach in practical applications

Challenges in using the Physics-of-Failure approach in pract...

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2017 IEEE Industry Applications Society Annual Meeting, IAS 2017

作者： Irias, Nayara G. N. Souza, Frederico A. L. De Paula, Hélder Silva, Leonardo Adolpho R. Graduate Program in Electrical Engineering Federal University of Minas Gerais Av. Antônio Carlos 6627 Belo H. MG31270-901 Brazil Electrical Engineering Department UFMG Av. Antonio Carlos 6627 Belo Horizonte MG31270-901 Brazil Telecomunications and Mechatronic Engineering Departments UFSJ Campus do Alto Paraopeba Rodovia MG 443 km 7 Ouro Branco MG36420-000 Brazil

ISBN: (纸本)9781509048946

The authors plan to perform a new reliability analysis of a motor drive system for mining applications, whose environment is harsh due to the presence of vibration, high temperature, dust and other stress factors. The previous study was disregarded because it had been made using the traditional approach, based on handbook constant failure rate models. Since this traditional method is no longer recommended, the approach based on the physics-of-failure (PoF) has been deeply studied by the authors, to be applied in the aformentioned analysis. However, several difficulties have been experienced when using this approach for the reliability assessment of systems in operation. In this context, this paper presents a discussion about the challenges regarding the application of the PoF methodology in the field, and, in the face of such difficulties, it debates hybrid and probabilistic models that aim to overcome them. Finally, a questioning pointing out the problems that a field engineer may find when employing these reliability methods is exposed to raise a discussion that intends to enlighten the subject and promote their effective use in practice. © 2017 IEEE.

关键词： Reliability analysis

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Perceptions of existing wearable robotic devices for upper extremity and suggestions for their development: Findings from therapists and people with stroke

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JMIR Rehabilitation and Assistive Technologies 2018年第5期20卷 e12-e12页

作者： Elnady, Ahmed Ben Mortenson, W. Menon, Carlo Menrva Research Group School of Engineering Science Simon Fraser University Burnaby BC Canada Department of Occupational Science and Occupational Therapy Faculty of Medicine University of British Columbia Vancouver BC Canada International Collaboration on Repair Discoveries Vancouver BC Canada GF Strong Rehabilitation Research Program Vancouver BC Canada Menrva Research Group School of Mechatronic Systems and Engineering Science Simon Fraser University M250-13450 102 Avenue Surrey V3T 0A3 BC Canada

Background: Advances in wearable robotic technologies have increased the potential of these devices for rehabilitation and as assistive devices. However, the utilization of these devices is still limited and there are questions regarding how well these devices address users' (therapists and patients) needs. Objective: The aims of this study were to (1) describe users' perceptions about existing wearable robotic devices for the upper extremity;(2) identify if there is a need to develop new devices for the upper extremity and the desired features;and (3) explore obstacles that would influence the utilization of these new devices. Methods: Focus groups were held to collect data. Data were analyzed thematically. Results: A total of 16 participants took part in the focus group discussions. Our analysis identified three main themes: (1) “They exist, but...” described participants' perceptions about existing devices for upper extremity;(2) “Indeed, we need more, can we have it all?” reflected participants' desire to have new devices for the upper extremity and revealed heterogeneity among different participants;and (3) “Bumps on the road” identified challenges that the participants felt needed to be taken into consideration during the development of these devices. Conclusions: This study resonates with previous research that has highlighted the importance of involving end users in the design process. The study suggests that having a single solution for stroke rehabilitation or assistance could be challenging or even impossible, and thus, engineers should clearly identify the targeted stroke population needs before the design of any device for the upper extremity. © Ahmed Elnady, W Ben Mortenson, Carlo Menon.

关键词： Focus group Qualitative research Rehabilitation Upper extremity Wearable devices

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Profit Analysis Model of Smart Item Implementation in Integrated Supply Chain Process

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IOP Conference Series: Materials Science and engineering 2018年第1期319卷

作者： Yustina Tritularsih Andhy Rinanto Hoedi Prasetyo Cucuk Nur Rosyidi Student of Industrial Engineering Program Faculty of Engineering Sebelas Maret University Jl. Ir. Sutami No. 36A Kentingan Surakarta 57126 Indonesia Staff Lecturer of Mechatronic Departement Politechnic ATMI Surakarta Jl. Adisucipto/Jl. Mojo No.1 Laweyan Surakarta 57145 Indonesia Staff Lecturer of Industrial Engineering Program Sebelas Maret University Jl. Ir. Sutami No. 36A Kentingan Surakarta 57126 Indonesia

Nowadays all links of the entire supply chain need to integrate their different infrastructures and they have better control of them to drive better profits. This integration should offer the ability for companies in order to have an overall and transparent insight to its supply chain activities. An intelligent supply chain which is mainly supported by Smart Items technology can satisfy the need of those integration. By means of Smart Items, a company can benefit some advantages. Those are cost reduction and value creation. However, currently there is no comprehensive Smart Item infrastructure exists yet so it is difficult to calculate the true benefit information. This paper attempts to recommend a model for estimating the benefits of implementing Smart Items in a company which has an integrated supply chain process. The integrated supply chain means that three echelons (supplier, shipper and retailer) of supply chain are belonged to a company. The proposed model was used to determine the shrinkage value and RFID tag price which can give the maximum benefit of Smart Items implementation. A numerical example is also provided to give a better comprehension on model calculation.

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Analysis of online active noise control strategies by hybrid algorithm

Analysis of online active noise control strategies by hybrid...

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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Jesús A. Calderón Julio Tafur Benjamín Barriga Edgar Manzano Mechatronic Engineering Master Degree Program Pontificia Universidad Católica del Perú

ISBN: (纸本)9781467386456

Engines operations usually produce intense noise and may cause hearing injuries. Therefore, passive absorbers are being used to reduce or eliminate unwanted noise. However, this mechanism is connected with high costs and space requirements. Active Noise Control (ANC) allows to eliminate mentioned drawbacks and therefore offers a better solution. ANC can be designed by feedback, feedforward or hybrid algorithm. Hybrid algorithm has an average settling time, but allows a good response in presence of disturbances. In this paper a fair noise reduction is shown for the use case where an identification process is being made inside of the main hybrid control algorithm loop (online).

关键词： Algorithm design and analysis Feedforward neural networks Transfer functions Noise measurement Mathematical model Adaptation models Prediction algorithms

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