bluuebunny/crossref_metadata_2025_split huggingface dataset:
FTIR spectroscopy characterization and critical comparison of poly(vinyl)alcohol and natural hydroxyapatite derived from fish bone composite for bone-scaffold
Authors: Hooi May Teng , Phang Siew Wei , Yow Hui Ying , David Edmund , Kim Ning Xin , Choo Hui Leng 
Published: December 2021

Abstract
This paper presents the interaction comparison of poly(vinyl) alcohol (PVA) with hydroxyapatite derived from Spanish Mackerel (SM) and Whitefin Wolf Herring (WWH) bones, in different processing method. PVA filament and solution casting method illustrated higher crystallinity in the FTIR graph as compared to the PVA pellet and filament extrusion method. Besides, minimal interactions between PVA with glycerol and HAp was observed as well. PVA pellet and solution casting method portrait higher interaction as compared to the PVA filament and extrusion method. As for the HAp of SM and WWH, WWH had higher crystallinity and better cell adhesion with a higher Ca/P ratio while SM had relatively better mechanical strength with Ca/P ratio near to stoichiometric value. The loading of HAp (0, 2.5, 5, 10, 20, 30%) does not affect interactions of PVA/HAp composite in FTIR, and thermal properties in TGA. However, it caused an increase in crystallinity at low HAp loading and decreased at higher loading of HAp above 10%. Upon addition of HAp, tensile strength increased and elongation at break decreased. As the loading of HAp increased, both mechanical properties decreased. Scaffold with WWH composite possessed lower tensile strength and higher elongation at break than SM composite. The result of mechanical properties corresponded to the SEM result. ANOVA analysis justified the effect of HAp variations and loading on the mechanical properties of the composite was prominent.
Harvesting energy from vehicle transportation on highways using piezoelectric and thermoelectric technologies
Authors: Mujaahiid Lallmamode M A , Mahdi Al-Obaidi A S 
Published: December 2021

Abstract
For many years, the rate of energy consumption has been higher than the rate at which natural resources are being generated. Green energy is a major solution to achieve a sustainable future and mitigate carbon footprints. Today, the transport sector highly relies on fossil fuel, consuming nearly one-quarter of the total energy in developed countries and represents a massive environmental burden. Hence, the fate of future energy security does not solely lie in the efficient use of existing green energies but also in the development of new energy sources. This study proposed the design of thermoelectric and piezoelectric energy harvesting systems to make use of the huge thermal energy due to solar radiation and mechanical strain due to moving vehicles to generate electricity. Both systems were built at an experimental scale model and tested. The thermoelectric system produced an output power of 1.06 mW and an open-circuit voltage of 118.2 mV at a temperature difference of 14.8 °C. A maximum average power output of 1.55 mW is achieved over a period of 6h per day. The Piezoelectric generated a peak DC voltage of 9.83 V, under normal stress of 235.04 kPa. The results also showed that the piezoelectric system could provide a consistent output voltage as long as the system experience normal stress. The system could produce an output power of 0.2 mW.
2-D UAV navigation solution with LIDAR sensor under GPS-denied environment
Authors: Ho J C , Phang S K , Mun H K 
Published: December 2021

Abstract
Unmanned aerial vehicle (UAV) is widely used by many industries these days such as militaries, agriculture, and surveillance. However, one of the main challenges of UAV is navigating through an environment where global positioning system (GPS) is being denied. The main purpose of this paper is to find a solution for UAV to be able to navigate in a GPS denied surrounding without affecting the drone flight performance. There are two ways to overcome these challenges such as using visual odometry (VO) or by using simultaneous localization and mapping (SLAM). However, VO has a drawback because camera sensors require good lighting which will affect the performance of the UAV when it is navigating through a low light intensity environment. Hence, in this paper 2-D SLAM will be use as a solution to help UAV to navigate under a GPS-denied environment with the help of a light detection and ranging (LIDAR) sensor which known as a LIDAR-based SLAM. This is because SLAM can help UAVs to localize itself and map the surrounding of the environment. The concept and idea of this paper will be fully simulated using MATLAB, where the drone navigation will be simulated in MATLAB to extract LIDAR data and to use the LIDAR data to carry out SLAM via pose graph optimization. Besides, the contribution to this research work has also identified that in pose graph optimization, the loop closure threshold and loop closure radius play an important role. The loop closure threshold can affect the accuracy of the trajectory of the drone and the accuracy of mapping the environment as compared to ground truth. On the other hand, the loop closure search radius can increase the processing speed of obtaining the data via pose graph optimization. The main contribution to this research work is shown that the processing speed can increase up to 45 % and the accuracy of the trajectory of the drone and the mapped surrounding is quite accurate as compared to ground truth.
The application of image processing for Human-Computer Interface (HCI) using the Eye
Authors: Tan J K , Chew W J , Phang S K 
Published: December 2021

Abstract
The field of Human-Computer Interaction (HCI) has been developing tremendously since the past decade. The existence of smartphones or modern computers is already a norm in society these days which utilizes touch, voice and typing as a means for input. To further increase the variety of interaction, human eyes are set to be a good candidate for another form of HCI. The amount of information which the human eyes contain are extremely useful, hence, various methods and algorithm for eye gaze tracking are implemented in multiple sectors. However, some eye-tracking method requires infrared rays to be projected into the eye of the user which could potentially cause enzyme denaturation when the eye is subjected to those rays under extreme exposure. Therefore, to avoid potential harm from the eye-tracking method that utilizes infrared rays, this paper proposes an image-based eye tracking system using the Viola-Jones algorithm and Circular Hough Transform (CHT) algorithm. The proposed method uses visible light instead of infrared rays to control the mouse pointer using the eye gaze of the user. This research aims to implement the proposed algorithm for people with hand disability to interact with computers using their eye gaze.
Investigation of Electrical Properties of TiO2 Nanocomposite Based Polymer
Authors: Ameer Ali Anis Akilah Binti , Ahmad Hafisoh , Yap Hoon , Bin Ismail Hafizul Azizi 
Published: December 2021

Abstract
Past research has reported the challenges regarding on degradation and aging due to high localization of electric field at triple point areas of polymeric insulator. The different materials and designs of polymeric insulator have initiated the partial discharge and arching activities which eventually lead to the insulation failures. The compounding of nanomaterials in the polymer shows a promising result to overcome this problem by redistributing the uniformity of electrical field lines on the insulator. In the present work, ethylene-propylene-diene rubber (EPDM) and titanium dioxide (TiO2) is introduced as nano composites that been embedded into insulator’s housing made of 1) silicone rubber (SiR) and 2) Ethylene Propylene Diene Monomer (EPDM) Rubber. Titanium dioxide (TiO2) is a semiconductor material that can be formed in different sizes either micron or nano-sized filler and has high relative permittivity that be able to reduce the high electrical stresses on high voltage equipment. Meanwhile EPDM shows good mechanical profile, excellent resistance properties and low cost. Therefore, it brings to the new opportunity to fabricate the nanocomposite based on both materials which exhibits an improved electrical properties and good distribution of electric field on polymeric outdoor insulators. In depth investigation was carried out to analyze the effect of different nano-filler loading in the compound and behavior of nanocomposites at different polymer base. An 11kV polymeric insulator is modelled to be simulated by using COMSOL Multiphysics software under dry-clean surface conditions to investigate the electric field distribution at terminal ends and along the insulator creepage path. The Electrostatics interface from the AC/DC Module is used in the evaluation of electric field distribution of insulator model correspondingly with the variations in filler percentage in the host matrix.
The influence of continuous and periodic microwave drying on rosemary: drying and temperature kinetics
Authors: Ali A , Chua B L , Chow Y H 
Published: December 2021

Abstract
Continuous microwave is a heavily studied drying method known for its effectiveness and efficiency, however, it leads to overheating in most cases. The primary objective of the present research is conducting and evaluating a comparative study of continuous and periodic microwave drying on rosemary for various power levels (6, 9 and 12 W/g) and different pulse ratios to overcome the overheating challenge. The evaluation and assessment were based on drying and temperature kinetics. Drying kinetic study revealed that periodic and continuous microwave drying at 12 W/g had the least drying duration of 12.5 and 11 mins, respectively. Likewise, both processes had the highest drying rates of 0.364 and 0.461 kg H2O/ kg dry basis min. The temperature kinetic study showed that the periodic microwave drying (71.4°C) resulted in a lower maximum sample temperature than continuous microwave drying (79.2°C). The periodic microwave drying with higher pulse ratios had a more even heating throughout the drying process than lower pulse ratios. Thereby, periodic microwave drying at 12 W/g and the highest pulse ratio was deemed to be the most suitable drying process for rosemary. The four thin layer models, namely Page, Modified Page, Midilli & Kucuk and Modified Midilli & others, were the most suitable to describe the drying kinetics of rosemary.
Analysis of fault patters based on erarthquake data on the land of Sumatera island
Authors: Basid A , Munir B 
Published: December 2021

Abstract
Geodynamics of Sumatra is interesting to study because of the unique geological setting Geodynamics of Sumatra is interesting to study because of the unique geological setting and high seismicity. This high seismicity is caused by the many faults found on land and in the surrounding waters. This paper presents the results of research that aims to determine fault patterns both on land and in the waters around Sumatra based on earthquake data from 1960-2000. The area under study is at the coordinates of 6°N - 6°S and 95°E - 109°E at an epicenter depth of <60 km with a magnitude between 4-10. The area is divided into two zones, namely the front arc and the Barisan arc. Data were obtained from ISC and Global CMT. By using the Focal Mechanism Method, the results show that the fault pattern in the Sumatran forearc Basin zone is dominated by an Reverse Fault located in the accretion zone while on the mainland of Sumatra it is dominated by Strike Slip along the Sumatran Fault System. By knowing the position and pattern of the fault, especially on the mainland of the island of Sumatra, it can be used as a reference for spatial planning. In addition, further studies will also be able to learn about the dangers or disasters caused by the fault pattern.
Development of Simple Teaching Aid on Resonance Topic Using Audacity Software as Learning Media
Authors: Nurmiati  , Safira N , Saehana S , Wahyono U 
Published: December 2021

Abstract
This study aims to develop a simple prop of resonance topic using audacity software. The research was conducted based on the model from Borg and Gall, which involved only five main steps: analyzing the developed product, developing the initial product, expert validation and revision, small-scale field trials and revisions, and large-scale trials and final products. The small-scale and large-scale feasibility tests were given to 29 students of SMAN 5 Palu Class XI IPA6. The product quality data obtained were analyzed using a descriptive analysis from quantitative data into qualitative, then the average quality score was processed using category criteria. In the analysis results, the overall average score of media experts is 2.97, categorized as “Good”. The overall average score from material experts was 3.33, categorized as “Very Good”. While the average analysis result of the overall small-scale trials was 3.35, categorized as “Very Good”, and the result of the overall large-scale trials was 3.39, categorized as “Very Good”. The overall average score obtained in the transformation in table 2 shows that the simple teaching aid on resonance topic using the Audacity software developed by the researcher was feasible to be used as a medium for learning physics in the classroom.
Refractor telescope design using web camera
Authors: Karaeng M A , Saehana S , Wahyono U 
Published: December 2021

Abstract
The purpose of this study was to develop a refractor telescope using a web camera as learning media. It was the Research and Development (R&D) study which referred to the model modified by Sugiyono. The product was evaluated by a media expert and undergraduate students of Sub-Department of Physics Education, Tadulako University using questionnaires with a 4-point Likert scale. The product quality data obtained were analyzed using descriptive analysis. The quality of the product based on the analysis of the media expert’s assessment was good with the average score of 2.92. Meanwhile, the results of student responses to the limited trial obtained a score of 3.20 which indicated the agreement of usability. The test results and questionnaire analysis showed that the refractor telescope using the developed Web Camera (WebCam) is feasible to be used as learning media.
Students’ understanding of electric fields in the context of multiple representation
Authors: Rizkiyanti N , Mansyur J 
Published: December 2021

Abstract
This study aims to describe physics students’ understanding of the concept of electric fields through a multi-representation review in a qualitative way. This research is a qualitative research using test and interview techniques to obtain the data. The research subjects consisted of 6 students from Physics Education department. The test used is an essay test which includes indicators of translation, interpretation and extrapolation on the concept of an electric field. The more in-depth interviews with respondents related to the concept of the electric field were carried out in this study. Based on data analysis, it can be concluded that students’ conceptual understanding is in the moderate category. The highest scores obtained are in translation, interpretation, and extrapolation respectively, which show that the level of indicator complexity affects student achievement. This research implies that the poor conceptual understanding of students on extrapolation indicators caused by the lack of creativity in students’ thinking in exploring the whole information presented on a particular issue. Thus, a learning method that priorities high-level critical thinking skills is extremely needed.
Students’ scientific representation enhancement through “ECRA” techniques in formative examination design
Authors: Rizal Khoo Linda Nurul Jannah Mohd , Abdul Rahman Nor Farahwahidah , Othman Salmah , Sobri Noraidah 
Published: December 2021

Abstract
The recent studies in science learning has a specific interest with 4C’s which are communication, collaboration, critical thinking and creativity. This study explored the students’ 4C’s as they engage with physics concepts relating to alternating currents. This engagement entails students’ interpretation for descriptive questions. Following action research cycle, the study begin with planning the intervention using “ECRA” technique and conducted the activities with 38 Matriculation College students. The analysis attempt to make a connection between students’ ability to construct representational aspects of scientific description with formative achievement. This study systematically describes students’ understanding on the representations signify in the descriptive questions. Data collected from this study were Work Report, review of answers tutor questions, and interviews during observation stage. The finding suggests that, the ECRA technique is enabling students to obtain higher percentage in formative assessment by allowing them to developed richer conceptual understanding. Hence this study suggest that the representational issues in physics questions constructed in essay can be moderated with ECRA technique.
Simple Harmonic Motion Electronic Teaching Materials Based on Authentic Learning to Train Students’ Problem-Solving Skills: Aspects of Validity
Authors: Saputri S R , Wati M , Misbah M 
Published: December 2021

AbstractThe absence of teaching materials that can train students’ problem-solving skills optimally is the background of this research. This study describes the validity of simple harmonic motion electronic teaching materials based on authentic learning to train students’ problem-solving skills. This research is development research with the ASSURE model that focuses on the Utilization of Instructional Materials stage. The instrument used is the validity sheet of electronic teaching materials. The validity of electronic teaching materials is viewed from the aspect of content, construct, and appearance. The validation of electronic teaching materials is carried out by three validators: two expert validators and one practitioner validator. The data analysis technique used descriptive statistics. The results showed that the validity of electronic teaching materials with an average score of 3.87 was categorized as good. It was concluded that the simple harmonic motion electronic teaching material based on authentic learning was declared valid to train students’ problem-solving skills. Furthermore, these electronic teaching materials can be used as teaching materials in the classroom to determine the practicality and effectiveness of the developed teaching materials.
Development of nano physics learning media (physics monopoly game) based on software
Authors: Hendri M , Jarnawi M 
Published: December 2021

Abstract
This study aims to develop NaNo Physics learning media (Physics Monopoly Game) on work and energy topic. The type this research was research and development (R&D) with the ADDIE model. Data were analysed using the descriptive statistical analysis. The results indicated that the physics monopoly was feasible to be used as a learning media. The overall results of the assessments of material and media experts, and students from individual trials, small group trials and field trials showed that they had met the eligibility requirements of the developed physics monopoly learning media. In addition, according to the field testing, the developed product can increase students’ learning motivation from an average score of 3.19 which was in the “enough” category and increased to 4.39 in the “very high” category.
Langmuir and Freundlich isotherm equation test on the adsorption process of Cu (II) metal ions by cassava peel waste (Manihot esculenta crantz)
Authors: Nuryanti S , Suherman  , Rahmawati S , Amalia M , Santoso T , Muhtar H 
Published: December 2021

Abstract
This Study aims to determine the adsorption process of Cu (II) metal by cassava peel waste (Manihot esculenta crantz) meeting the Langmuir equation and Freundlich. Research method cassava peel made into activated carbon, then determine the mass, pH and optimum contact time. Then the determination of the maximum adsorption capacity was carried out by testing with the Langmuir isotherm and Freundlich isotherm equations. The results showed that the best conditions (optimal conditions) were obtained with the addition of 0.5 grams of active carbs from cassava peels. The percentage of Cu ion adsorption in these conditions was 97.72%, at pH 6 and a contact time of 60 minutes and the absorption capacity was 98.49%. The maximum adsorption capacity of cassava peel activated carbon to Cu(II) ions at the optimum condition was determined based on the Langmuir and Freundlich isotherm equations. The results obtained were-51.813 mg/g and 26,792 mg/g, respectively.
Research on the Influence of Haze Weather on Audible Noise of HVDC Transmission Line
Authors: Zhang Qingxia , Wang Fengxin , Fang Jizhong , Wu Yang , Qian Yong 
Published: December 2021

Abstract
In order to study the influence of haze weather on audible noise of HVDC transmission line, a calculation model of ion flow field of HVDC transmission line considering the influence of haze is established, and then the relationship between different haze levels, different haze particle concentrations and audible noise is analyzed by taking the maximum potential gradient on the conductor surface as the intermediary. Then a ± 800kV DC transmission line is simulated and the results show that the audible noise will be more prominent with the increase of haze concentration, and the increment is more obvious at higher haze concentration; The charging of haze particles is the principal origin for the increase of audible noise, and the effect of PM2.5 is the most significant.
Fault Diagnosis of Permanent Magnet Synchronous Motor Inter Turn Short Circuit Based on Deep Reinforcement Learning
Authors: Li Fangli , Wang Yanbo , Xu Song , Li Yuanjiang 
Published: December 2021

Abstract
With the increasing market share of Permanent Magnet Synchronous Motor(PMSM), the fault diagnosis and prediction technology for PMSM is becoming increasingly important. Firstly, in order to solve the problem of insufficient fault sample data consisting of negative sequence current, electromagnetic torque and other inter turn short circuit fault feature terms, the Conditional Generation Adversarial Network(CGAN) is used to expand the data set. Then, with sufficient data, Dueling_DQN algorithm of deep reinforcement learning is used to train and optimize the extended data set. Finally, the effectiveness of the algorithm in the field of PMSM fault diagnosis is verified by simulation training. The results show that the fault diagnosis accuracy of the algorithm can be reached 97.5%, while improved the convergence speed and saved the time cost of fault diagnosis.
Study on Side Collision of Battery Boxes Based on HyperWorks
Authors: Qiao Weigao , Zhang Zhanxi , Lu Dong , Yu Lei 
Published: December 2021

Abstract
To effectively improve the safety of battery boxes in side collision of electric vehicles, two measures are proposed: Firstly spread the boss evenly around the battery box. Secondly the upper and lower parts of the battery box are matched with the convex heads and groove structure. The finite element models of the battery boxes before and after the optimization, the vehicle and the movable barrier are established in this paper. According to the collision regulations, the side collision simulation of the vehicle body is carried out. The changes of the stress, deformation and lateral acceleration of the battery boxes are analyzed. The effectiveness of the measures is verified. The extrusion models of the battery boxes are established. The deformation and the changes of the internal energy of the battery boxes are analyzed. The effectiveness of the measures is verified again.