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APEC Youth Scientist Journal [APEC 청소년 과학학술지]

간행물 정보
  • 자료유형
    학술지
  • 발행기관
    국제과학영재학회 [The Society for the International Gifted in Science]
  • ISSN
    2005-5625
  • 간기
    반년간
  • 수록기간
    2009~2017
  • 주제분류
    자연과학 > 자연과학일반
  • 십진분류
    KDC 400 DDC 500
Vol. 9 No. 1 (9건)
No
1

In-vitro Valuation of Anti-Inflammatory Effect of Panax Ginseng by Inhibition of Albumin Denaturation Experiment

Kyuhee Jo

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.1-5

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Inflammation is self-defense mechanism of our body as a response to harmful chemical or physical agent that is involved in pain. Chronic inflammation may result in serious diseases, most notably cancer. This research aims to evaluate the anti-inflammatory capacity of Panax ginseng, which is a medical plant frequently used in Korean traditional medicine. In vitro anti-inflammatory activity was assessed using albumin denaturation assay at different concentrations. The absorbance of 50 μg/ml, 100 μg/ml, 200 μg/ml was measured at 280nm by UV spectroscopy, yielding results of 0.240.026, 0.150.032, 0.10.008. Correspondingly, the percent inhibition of each sample were measured as 97.04%, 98.04%, and 98.7% respectively. This result amply demonstrates Panax ginseng’s ability to inhibit inflammation as well as possible mechanism by which Panax ginseng promote anti-inflammatory effects. Further studies may include the evaluation of Panax ginseng as anti-inflammatory agent in in vivo experiment or other in vitro experiments.

4,000원

2

Naturally-Functional Myoelectric Prosthesis with Increased Lifespan

Jun Wei CHOW

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.7-11

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This study focused on researching new materials that could increase the lifespan with improvements on the sensors feedback and degree of freedom (DoF) of the prosthesis while retaining its lightweight. Titanium as the main material replacing plastics for support is the backbone of this research. Ultra-thin aluminium oxynitride will be used for extending the lifespan of the prosthesis. This study continues with discussion on the methods for increasing the number of the DoF for myoelectric prosthesis, which includes installation of various sensors for feedback from arm and implantation of nanoelectrodes directly onto the brain’s motor cortex and includes a powerful microprocessor for improve responses, setting up a feedback loop. It also discussed about the current technology on prosthesis and suggest

4,000원

3

Coconut Coir Based Sound Absorber Board For Noise Pollution Control

Joseph Karl C. Salva Jr., Bryne Alric L. Yu

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.13-18

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Green Technology is widely explored to manufacture materials from agricultural waste by-products as substitute to synthetic fibers and wooden-based materials for acoustic absorption purposes. This study was conducted the coconut coir (CC) natural fibers bound with sodium silicate as sound reducers. Boards were fabricated using 40g of CC mixed with 400mL of 20% sodium silicate solution, casted in 8”x 8”x 1⁄2”, compressed for 24h, and sun-dried for 8h. Sound Pressure level (SPL) before and after acoustic board insertions were monitored from 50-5000Hz frequency range using an acoustic chamber. A three-layer egg board was used as positive control. Three replications were conducted. Data showed that CC-sodium silicate based absorber can effectively reduce the sound pressure level. The maximum noise absorption peak (MNAP) for CC acoustic board occurs between 50 to 550Hz, while between 1950Hz to 2100Hz for the positive control. Results suggests that coconut coir based acoustic board was causing in attenuating sounds at low frequency range, while the positive control could reduce sounds efficiently at high frequency range. Data revealed that the fabricated board could be a potential sound-proofing medium. This innovative acoustic absorber board showed its viability as low-cost, biodegradable, and eco-friendly material compare to glass fiber and mineral based synthetic materials.

4,000원

4

Green Synthesis of Non-Purified Silver Nanoparticles Using Morinda citrifolia (Noni) Fruit Extract for Cytotoxicity Assay against MCF-7 (Human Breast Cancer)

Reisha Claffel Z. Ferraren, Peter Gabriel A. Muaña, Benito A. Baje

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.19-31

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With the problem of cancer on the rise, a need to explore alternative cures such as nanoparticles (NPs) exists. The usual production of these NPs is costly and hazardous, which highlights the need for much eco-friendly and cost-efficient techniques. In this study, silver (Ag) NPs were synthesized using green synthesis method from the fruit extract of Morinda citrifolia. Fourier Transform Infrared (FT-IR) Spectroscopy was used to identify the functional groups. Morphological assessment of the synthesized NPs was done using Scanning Electron Microscopy (SEM). Determination of the elemental composition was done using Energy Dispersive X-ray (EDX). The effect of the synthesized NPs on MCF-7 human breast cancer cell line was evaluated using MTT Cytotoxicity Assay. SEM images revealed nanospherical particles with sizes ranging from 28 nm to 136 nm. EDX spectroscopy evaluations suggested the successful formation of NPs with purity of 32.20%. FT-IR showed a number of peaks that represent different functional groups of biological origin. The green synthesized Ag NPs exhibited cytotoxicity against human breast cancer cell (MCF-7) with inhibitory concentration (IC50) greater than 100 μg/mL. Data indicated that the green synthesized NPs possessed anti-cancer activity. No significant differences were revealed among the anticancer activities of the silver nanoparticles and among the anticancer activities of the positive control, Doxorubicin®, in all respective concentrations. The green synthesized Ag NPs were potential alternative cures for cancer.

4,500원

5

Convergence Pattern Analysis between ICTs and Solid Waste Management Technology using Association Rule Mining with Patents

Yoonwhee Lee

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.33-42

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The application of the information and communication technologies (ICTs) towards sound solid waste management (SWM) is a challenging research area. This study is aimed at identifying evolving technological trends, competitor’s distribution and technological convergence pattern between ICTs and SWM technology. A total of 1041 patents’ applications that were submitted to Korean Intellectual Property Office (KIPO) from 1996 to 2016 were investigated as a dataset. Convergence patterns were obtained by applying the association rules of the International Patent Classification (IPC) codes. The results show some related technological fields where convergence technologies are mostly adopted and can contribute to establishing the development strategies of the ICTs - SWM technology in Korea.

4,000원

6

ALTCALC : Electronic Altitude and Distance Calculating Device

J. G. Casia, K. A., De La Torre, S. E., Nellas

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.43-52

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Altitude measurement in fields, forestry and engineering remain essential but still conventional methods of altitude measurement remain challenging. Present altitude measurement methods include height poles for trees and photogrammetric instruments. Both methods remain arduous as either process is both time and money consuming or susceptible to large parallax errors. In this innovative work an altitude and distance calculating device out of potentiometers based on trigonometry was developed. A laser diode was attached to a potentiometer, and the other components were soldered together in a circuit board. Device accuracy and precision was determined. User satisfaction survey was also noted. For the altimeter testing, the lasers were pointed at the top of the object and the device was placed at a 1-meter distance from the base of the object. The device was set to measure different heights from 0.5 m to 2.5m. For the distance sensor, the lasers were pointed at a 1-meter height and the device was set to measure different distances from 0.5m to 2.5m. Three replicates for each trial were performed and device readings were then compared to actual measurements to determine accuracy. Standard deviations of reading were then computed to determine precision. Net Promoter Score was used in order to assess external evaluator feedback. An Arduino based altimeter and distance sensor was successfully fabricated with 94.2 percent degree of accuracy and 95.4 percent precision for height measurement. For the distance sensor, a 91.4% accuracy, and 95.4% precision was determined. The device garnered a net promoter score of 66%.

4,000원

7

Safemo : A Proximity Sensing Device with GPS Tracker for Bikers

J. B. Allosada, J. Janea, M. W. Payo

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.53-58

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Increase in usage of technology and smart devices provides opportunities for a cost-efficient safety gadget that helps the victims during unpredicted dangers. Safemo, a microcontroller based safety device for bikers was made to provide additional security for bike users. It works in such a way that when an incoming vehicle is near to the biker, the ultrasonic detects the vehicle, the led and buzzer turns on subsequently, thus alarming the biker. Safemo also provides a safety SMS alert system. The SMS alert system utilized an android smartphone with the Safemo app installed. The android smartphone was used for receiving the location of the biker and sending an emergency message which contains the biker’s location to a chosen recipient. Safemo acts as a trigger, sending command to the phone to send the alert message. Results of user satisfaction survey showed that the fabricated device had 4.29(1 being the lowest and 5 being the highest) score for the usability, 4.26 for the aesthetics and design, and 4.53 for the functionality. It has 96.14% accuracy and 98% degree of precision within 4 meters range The SMS alert system was also successfully established. Data suggests a positive user satisfaction feedback of the said innovation based on a conducted survey. This paper covers descriptive details about the methods, application, testing and results that were obtained in the study.

4,000원

8

Arrowroot Flour Utilization (Maranta arrudinaceae L.) for Materials of Biodegredable Plastic

Mega Puspa Nurani

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.59-65

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The amount of plastic waste has increased because the use of a non-degradable plastics us packaging is growing. The problem of plastic waste can be above one of them with the use of biodegradable plastic that is easy to decompose in the soil. The effort to speed up the degradation of the plastic is done by replacing some or all of the material synthesis with natural ingredients. Arrowroot flour is one of the natural ingredients that can be used in the manufacture of biodegradable plastic because the charateristic are easily degraded in soil, many in amount and affordable price. To increase the strength, color clarity, elasticity and plastic degradation ability of these arrowroot plastic, glycerin is used as plasticizers and NaOH as factors add to it the value of the test of strength, as improving the clarity of the plastic colors and trigger an increase in the time of degradation. This research was conducted to find out how big the benefits of arrowroot flour in making biodegradable plastics in addition as one of the ingredients of the snacks in the community in Kudus. Arrowroot plastic researched by mixing flour arrowroot (3 g, 5 g, and 7 g) and glycerin (2 ml, 3 ml, and 4 ml) and NaOH ( 0 ml, 1 ml, and 2 ml) in 40 ml water. The addition of glycerin can increase the elasticity of arrowroot plastic. The addition of NaOH can be a trigger for an increase in the time of degradation in the soil. Optimum results of arrowroot plastic are obtained with the composition of the materials : 3 grams of flour, 4 ml of Glycerin, 2 ml of NaOH and 40 ml water. Characteristics of arrowroot plastic researched by using a test of strength with the results of 8 N, testing the elasticity of average results with 20% of the initial length and biodegradation tests with the final result 40 days.

4,000원

9

Customizing the Electronic Stability Program Through Artificial Neural Network

Chae Young Lee

국제과학영재학회 APEC Youth Scientist Journal Vol. 9 No. 1 2017.09 pp.67-71

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Modern day vehicles can hardly mobilize without the electronic control unit (ECU) – the CPU that controls every embedded system of the vehicle. One of the core system of ECU is the electronic stability program (ESP). It intervenes the driving by controlling the engine and the brake when the vehicle is in discord with the original intention of the driver. Current models of ESP set various modes that differentiate the activation rate of the ESP. Yet, several problems exist, as drivers have to manually alter the modes that match an immutable activation rate. Therefore, this thesis introduces a new ESP algorithm that automatically sets the activation rate. Artificial neural network (ANN) is employed, and experiment is designed to train this ANN algorithm with imaginary inputs. Successful results of customizing ESP will prove the possibility of applying artificial intelligence to the rest of the functions of ECU and thereby fully customizing the ECU.

4,000원

 
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