International Journal on Advanced Science, Engineering and Information Technology
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2006 research outputs found
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Strategies Encouraging Mode Shifting on Rail-Based Transportation: A Case Study in Jakarta
Get PDFPublic rail transport infrastructure has been developed to address urban issues in some major cities worldwide, including Jakarta, Indonesia. Despite its development, the rail transit ridership is not optimal yet, since traffic flows on the roads are still heavy and cause congestion. Therefore, the modal shift on rail transit in should be increased. The objective of this study is twofold; determining factors affecting the mode split on rail transit and exploring strategies to improve the modal shifting to rail-based transportation by taking into account the development of properties near the transit stations of Greater Jakarta’s commuter line, including hotel, retail, office, and residential. Both quantitative and qualitative methods through questionnaire survey and benchmarking study were used to obtain these objectives. The survey results show that punctuality is the factor that affects the modal shifting to rail the most, followed by train comfort and shorter waiting time. Benchmarking studies were conducted to develop strategies for improving the train performance in terms of those factors, which include utilizing planning and management tool for train scheduling and rail infrastructure control, improving the air conditioning system on board trains, and increasing the information availability by installin
Analysing Young Motorcyclist Trip and Parking Behaviours: A Strategy to Reduce Motorcycle Accident Numbers
Get PDFMotorcycle numbers in Indonesia are growing rapidly and contribute 84.4% of total motor vehicles. The death numbers from road traffic accidents (RTA) involving motorcycles also increase to 74% of the deaths, including young motorcyclists. WHO reported that RTA is the leading cause of death for people aged between 5-29 years. A series of Revealed and Stated Preference surveys have been undertaken to explore the characteristics of young motorcyclist trips and their behaviors towards three different virtual parking schemes aimed at finding the best parking schemes to control motorcycle usage among young motorcyclists. Therefore, the number of young motorcyclist-related RTA could be reduced. The finding suggests that young motorcyclists preferred using off-street parking over on-street parking. The preferred distance between parking premises and activity centers is less than 50 meters. The off-street parking would be selected instead of the on-street parking, although its price is higher. The Willingness to pay for each proposed parking scheme is IDR 3,373, IDR 3,509, and IDR 3,618. It is below the ability to pay, which is IDR 4,100. Thus, an on-street parking scheme with progressive pricing and a minimum base price of IDR 5,000 is proposed, where at least 30% of parking lots should be allocated for short-term parking. Finally, the proposed parking scheme must be supported by reliable public transport services based on the young motorcyclist preferences, which would be the direction of future research
Study Towards a Flapping Robot Maintaining Attitude During Gliding
Get PDFThe bio-inspired robot is such a topic that has received growing attention. The ornithopter micro aerial vehicle (MAV) is one of the challenging topics belonging to bio-inspired robots. This topic combines the research disciplines of Biology, robotics, and aeronautics. Energy efficiency is one of the advantages offered by a flapping robot. To reduce the power consumption, such a flapping robot can glide to perform locomotion. We investigated and developed a flapping robot with tail control to maintain robot attitude during performing locomotion/flight, especially gliding. The proposed tail structure mimics an airplane elevator. Lightweight materials and design are considered in this study. The system is designed to allow the robot to have wireless long-range control. The robot can be controlled from a base station wirelessly via Wi-Fi connection. This study presents a comparison between a small wing with good stiffness and a large wing with less stiffness. The small wing with good stiffness is better and it could generate thrust 1.56 times higher than the large wing. Leading and trailing edges bending of a large wing during flapping can be a possibility source of induced drag. Gliding performance was also evaluated. Robot could glide up to 8 meters in 2 seconds at 0.9 meters altitude. The developed robot demonstrated an aggressive flight that reached close to 5 m/s. The developed tail mechanism and controller were confirmed that it helps the robot to perform maintaining its attitude and recovering from a stall within a few milliseconds
Mapping the Provincial Food Security Conditions in Indonesia Using Cluster Ensemble-Based Mixed Data Clustering-Robust Clustering with Links (CEBMDC-ROCK)
Get PDFProblems related to food are indeed an issue that continues to be discussed by the government, both imports, self-sufficiency, the issue food security. Food security conditions have become one of the biggest problems in Indonesia, even though Indonesia is an agricultural country with abundant resources. The problem is not only the availability but also the affordability. It happens due to the social inequality between the rich and the poor, which means the rich can easily relish food. People with low incomes experience food insecurities. Thus, an appropriate strategy and policies can be done for each province in Indonesia to make it equal. Cluster analysis is used to map the provincial profile based on the condition of food security. However, the variable types in this research are numerical and categorical data, which makes general cluster analysis insufficient. This study used the Cluster Ensemble Based Mixed Data Clustering-Robust Clustering Using Links (CEBMDC-ROCK) method to cluster provinces in Indonesia based on food security conditions. The analysis process starts with numerical clustering data using Agglomerative Hierarchical Clustering (AHC) and then with categorical data using Robust Clustering Using Links (ROCK). The result shows that the province in Indonesia is divided into five groups based on the quality of food security, which is from very low to excellent. Based on the clustering results, which provinces need special attention from the government regarding food security can be seen
Prediction of Particulate Matter (PM) Concentration of Wooden Houses in the Highlands by Two Statistical Modelling Methods
Get PDFWooden houses can potentially contain high levels of Particulate Matter (PM), which can cause lung disease in residents. Wooden houses have advantages in terms of maintaining the sustainability of building materials. Building design needs to pay attention to PM predictions in residential homes to avoid sick building syndrome. This study aimed to investigate and find predictive models for PM 10, PM2.5, and PM1.0 in wooden houses based on PM content in outdoor spaces. The study used quantitative methods by measuring PM10, PM2.5, and PM1.0 indoors and outdoors in wooden houses in Wonosobo Regency. The number of samples is 100 wooden houses. Measurements were carried out for one full day for each residential house. Data recording is done every 15 minutes—prediction model development using linear regression test and structural equation modeling (SEM). The results obtained three equations based on PM10, PM2.5, and PM1.0. PM10indoor = 53.202 + 0.406 PM10outdoor; PM2.5indoor = 36.865 + 0.373 PM2.5outdoor; PM1.0indoor = 34.143 + 0.194 PM1.0outdoor. The difference with the results from SEM is PM10indoor = 52.89 + 0.41 PM10outdoor, PM2.5indoor = 38.31 + 0.37 PM2.5outdoor, PM1.0indoor = 26.58 + 0.19.PM1.0outdoor. There is no significant difference in the prediction results, so it can be concluded that the Prediction Model is valid. The implications of this research can provide input for improving the standard of PM content in wooden houses. The study results become input for the government in monitoring PM content in simple houses
ZnO Nanostructure Synthesized by Hydrothermal Method for Butane Gas Sensor
Get PDFZinc oxide (ZnO) nanostructure was successfully synthesized on an alumina substrate by the hydrothermal method. The hydrothermal method consists of two stages: the preparation of seeding layers and the growth of ZnO nanostructures. 0.4 M Zinc Acetate Dihydrate (Zn(CH3COO)2·2H2O) and 3 M Sodium Hydroxide (NaOH) were used as precursors. The hydrothermal process was carried out at 90 °C for 4 hours. Morphological characterization of ZnO nanostructures was conducted by using Scanning Electron Microscope (SEM). The result produces a diameter of 60-80 nm and a length of 600-800 nm in the form of nanoflowers. The crystal and crystalline structure were studied with XRD, and it was shown that the ZnO nanostructure is a wurtzite structure in the form of a hexagonal shape and has a crystallite size of 59 nm. After conducting electrical characterization, it was shown that the current is directly proportional to the voltage, forming an ohmic contact curve. ZnO nanostructures have the potential to be applied as a gas sensor since the good response indicated the presence of butane gas. It is clarified that the nanostructure with a flow rate of 200 mL/min has a change in resistance of 0.17 MΩ/s with a recovery time of 30 seconds when it is exposed to butane gas for one minute. ZnO nanostructures also have a sensitivity change of 0.000495 MΩ/mL in the gas flow rate range of 50-250 mL/min
Identification of Proteolytic and Pectinolytic Yeasts from Civet (Paradoxorus hermaphroditus) and Evaluation of their Potential to Modify Coffee Bean Quality
Get PDFCivet coffee is one of the world’s most popular and expensive coffee types. The problem recently is the difficulty of finding natural civet coffee. The study of artificial civet coffee production using microorganisms to ferment the coffee in recent years has attracted the attention of many researchers. This study aims to characterize and identify yeast from civets and evaluate its potential as a starter in coffee fermentation. Three types of yeast isolated from civet feces have been isolated and characterized. They have varied morphological and biochemical characteristics. Only two yeast isolates Kh1 and Kh2 have the potential to be used as starters in fermentation due to the ability to degrade pectin and protein. The 18S rRNA gene fragment analysis results indicated that the isolates Kh1 and Kh2 were identified as Trichosporon asahii isolate E22922_ITS and Wickerhamomyces anomalus CNRMA10.1139. Applying both isolates as starters in coffee fermentation can improve the quality of coffee flavor and produce a higher score. Fermented coffee using W. anomalus starter provides more flavor, aftertaste, body, and overall advantages, while coffee fermentation using T. asahii isolate gives more value to the aroma. The highest cupping score was obtained for processed coffee using W. anomalus, reaching 84.42. Furthermore, it is necessary to carry out a more complex metabolite analysis to ensure the performance of the two isolates in modifying the chemical composition and taste of coffee
Observing the Performance of the TextRank Algorithm on Automatic Text Summarization for Bahasa Indonesia
Get PDFThe research about automatic text summarization is common in English text. According to the previous study, automatic text summarization in Bahasa Indonesia is still challenging due to research in this area, especially the research which discusses TextRank algorithm performance, which is still meagerly. Accordingly, this research observes the performance of the TextRank algorithm to summarize the text in Bahasa Indonesia. The TextRank algorithm summarizes a text by sorting out the essential words and relevant sentences regardless of the source language. This algorithm uses a vertex to represent a word. The similarity measurement process will calculate the overlapping words (the same word between two vertices). These overlapping words are represented by the edge, which connects the vertices. Thus, the text forms a graph. This research focuses on the similarity measurement process to determine relevant sentences in a text. As the similarity measurement is critical for the summarization result, this research switches the original process to the Levenshtein Distance algorithm and observes its performance. This research uses the human-produced summarized text by the expert in Bahasa Indonesia linguistics to evaluate the result. The evaluation method is conducted by using ROUGE-1 and ROUGE-2. The result shows that the average of ROUGE-1 and ROUGE-2 for the TextRank algorithm is 0.439 and 0.3186, respectively. Meanwhile, the modified TextRank obtains 0.3999 and 0.2805, respectively. Both of the algorithms have not shown satisfactory results as expected
Development of a Microcontroller Based Automated Regulating System for Efficient Management of Poultry Operation
Get PDFIn recent times, there has been a huge demand for protein sources in a developing country such as Nigeria due to its rapidly increasing population. Poultry, from which varieties of protein sources can be derived, offers one of the major solutions to this problem. Therefore, the need for poultry farmers to put in place measures to ensure a well-controlled and conducive environment to rear birds for maximum production and efficiency arises. This work designed and developed a microcontroller-based automated regulating system to manage poultry operations effectively. The major components employed in developing the embedded system include DHT 11 sensor, Arduino UNO microcontroller with ATMEGA 328P IC chip, MQ 135 sensor, float switch, Infrared (IR) proximity sensor, buzzer, lighting (DC) bulb, 60 W AC bulb, and exhaust fans. Using relevant design models and equations, circuit designs were implemented around the Arduino UNO microcontroller, the main element of the system's control unit. A performance test was conducted on the developed system. The test results revealed that all the embedded system's key units, including power supply, lighting, sensing, display, water, and feed level control units, were fully functional, and the overall system performance was satisfactory. Apart from being suitable and efficient for small-scale farmers to rear poultry birds, the developed automated poultry regulating system could be extended to train agricultural students on the basic rudiments such as feed, water, and environmental conditions requirements in poultry bird rearing
The Use of Tragacanth as a Gelling Agent in Roselle Flower Extract based Radiochromic Indicators
Get PDFGamma irradiation techniques have been used in various fields, such as sterilizing medical equipment and food products. In such a process, monitoring the dose of radiation using radio radiochromic dosimeter is important to guarantee the accuracy of the radiation dose absorbed by the irradiated materials. Radio chromic dosimeters usually consisted of radiation-sensitive dyes that could change colors when exposed to radiation. In this research, natural dyes in the form of anthocyanins obtained from roselle flower extract (Hibiscus sabdariffa L.) have been used as radio chromic indicators. The radio chromic indicators have been made in liquid using water solvent and gel using a tragacanth gelling agent. Each radiochromic indicator's pH values varied between 2 and 11 using NaOH and HNO3 solutions. All radio chromic indicators were then gamma irradiated using a Co-60 radiation source and tested for stability at 8°C under closed storage conditions. The characterization was performed using UV Vis spectrophotometry. The results showed that roselle flower extract was sensitive to gamma radiation as indicated by decolorization, and their sensitivity increased when made in the form of gel at pH 2 and 5. The stability test also showed that the anthocyanin content was stable after being maintained for 28 days in a closed storage at 8°C. With such differences in sensitivity of the roselle flower extract when used in either liquid or gel solution, the radio chromic indicators should find wide application in the future, depending on the radiation doses given to the solutions