bluuebunny/crossref_metadata_2025 huggingface dataset:
Current status of reading skills of kindergarteners at age 5-6 in pre-school
Authors: Nguyen Thi Hoa
Published: October 2020

Reading and writing skills are extremely important factors in improving the ability of each student at schools. In preschools, the preparation for reading of kindergarteners at 5-6 years old has been being taken care by training children in basic reading skills including language, image processing skills, auditory skills, and memory... This article focuses on analyzing the current status of reading skills of children aged 5-6 in preschools from 5 provinces: Cao Bang, Bac Kan, Thai Nguyen, Quang Ninh and Bac Giang; as well as analyzing factors affecting reading preparation for preschool children aged 5-6 in these areas. Survey results show that the rate of children's reading ability is at most normal level with many limitations in their reading skills. The cause may come from many influencing factors with different levels of impact on the reading ability of preschool students.
Numerical Investigation of Open Cavities with Parallel Insulated Baffles
Authors: Palaniappan Gokulavani , Murugan Muthtamilselvan , Al-Mdallal Qasem M. , Abdalla Bahaaeldin , Doh Deog-Hee
Published: October 2020

This research reports the outcome of a numerical investigation of convection in ventilation square cavities contains parallel insulated baffles. The left and right walls of the cavity are kept at the high temperature. Whereas the top, bottom cavity walls, parallel baffles are adiabatic. The opening slots are positioned at the top, bottom corners of the hot vertical walls. The governing Navier-Stokes equations are formulated in the form of vorticity- stream functions. The finite difference method is used to find the values of the primitive variables. The effects of baffles size (Sb − 0.25, 0.50, 0.75), 3 various positions of the parallel baffle, Rayleigh number (103 − 106), Reynolds number (30, 300, 600) are discussed with the flow fields, isotherms, and Nusselt number. It is found that the behavior of ventilation cavities does not only depend on the size of the baffles and its positions. It highly depends on the configuration of the ventilation cavity too. Further, the flow fields are restricted by the largest baffles size of Sb = 0.75.
Numerical Simulation and Field Synergy Analysis of IGBT Air-Cooled Heat Exchanger for EMUs
Authors: Guan Ying , Li Minghai , Cui Hongjiang
Published: October 2020

In view of the heat transfer and ventilation characteristics of the Insulated Gate Bipolar Transistor (IGBT) in the Electric Multiple Unit (EMU), the authors aim to improve the traditional fin structure of the air-cooled heat exchanger (ACHE) and propose the use of corrugated fin structure. Using the computational fluid dynamics (CFD) technology, the ACHE with new fin structure was numerically simulated, and the temperature field, velocity field and pressure field at different fin corrugation angles and the synergy between the fields were analyzed. The results show that the improved fin structure can make the fluid flow in a corrugated flow channel, effectively increase the flow distance, and thus significantly enhance the turbulence performance of the fluid in the ACHE; the fin corrugation angle of 120 degrees is the key design point; compared with the traditional fin structure, the new fin structure improves the synergy between the various fields and increases the heat exchange efficiency. The research findings provide new ideas for the design of this type of ACHE.
Mid-FTIR and Atomic Absorption Spectroscopy Based Evaluation of Oxidation Tendencies of Lubricating Oils for Effective Oil and Gas Operations
Authors: Tirmizi Syed Talha , Tirmizi Syed Rizwan Ul Haq , Tirmizi Syeda Amara
Published: October 2020

Lubricants help combat an array of challenges posed during both onshore and offshore operations including in the application of thrusters, mud pumps, mud agitators, drive systems, lifts/hoists systems etc. The evaporation loss of lubricating engine oil can significantly impact the engine’s performance and emissions, by thermal degradation and corrosion. The present research focuses on challenges arising due to oxidation of lubricating oils used in different machinery by implementing thorough quantitative analysis. The interferometry was adopted to test oil samples and infrared rays were resolved into its component wavelength relative to associated functional group such as C=O and O-H groups. The frequency domain was retrieved from interferometric data by Fourier transformation with the help of FTIR (Fourier Transform Infrared Ray) spectrometer. To comprehensively understand the wear and tear process inside the peripheries of the engine, atomic absorption spectroscopy (AAS) was used for determination of metals concentration. The changes in physical and chemical properties of oil samples were discussed to retrieve useful interpretations including percentage of wear and tear was found to be 15.2% at 3000 engine running hours. The research concluded by addressing the potential impact of oxidation by-products on the lubrication performance which ultimately influence the efficiency of the oil and gas upstream operations. The research inferred to contribute towards establishing a relative deterministic approach for predicting the oxidative tendencies of lubricating oils whilst keeping in view its physical characteristics.
Entropy Analysis of a Simple Rectangular Radiating Fin for Space Applications
Authors: Bhat Pramatha , Katte Subrahmanya S.
Published: October 2020

For growing interest in planetary exploration, it is substantial to study the utilization of energy for future-built planetary settlements, as energy resources are at a premium far away from earth. Entropy analysis is proposed as a suitable tool to study these systems, and make them energy efficient. Hence, a simple, purely radiating rectangular fin is studied by entropy generation analysis. The distribution of temperature and radiosity of the fin is first obtained by solving the governing heat transfer equation by second order finite difference numerical analysis. Using these data, the heat transfer and entropy generation of fin, fin-base, and the surrounding space is calculated. The effect of solar irradiation on the heat transfer of fin is also considered. The influence of pertinent, non-dimensional parameters on the total rate of entropy generated by the fin system is analyzed. Further, a correlation with these parameters is obtained for the total entropy generation.
Structural Features and Smoke Resistance of Water Mist Curtain of Upper Spray Nozzle
Authors: Jin Xiaohua , Zhang Lingbo , Li Xiaoyan , Zhu Caixia
Published: October 2020

Due to its structural limitation, the super-long tunnel faces the difficulty in smoke suppression on the ceiling. For this, the authors aim to develop a water mist curtain with an upward sprinkler head and analyze its smoke suppression performance. FDS numerical simulation was conducted to analyze the changes over time of different parameters such as temperature, smoke spread, radiative heat flux density, CO volume fraction, and the distance between the sprinkler head and the ceiling, and explore the smoke-proof and fire extinguishing effect of the improved water mist curtain together with the tunnel's smoke exhaust system. The results show that with the spray flow rate of 12L/min and droplet size of 300μm, the water mist system with upward sprinkler heads has a more efficient smoke suppression efficiency than the conventional one; the improved water mist system reduced the temperature at the tunnel ceiling by more than 40%, and the CO volume fraction by about 33%, thereby significantly decreasing the smoke density on the ceiling; it reduced the radiative heat flux density at a height of 2m by about 47%, and especially when coupled with the tunnel smoke exhaust system, the smoke suppression performance is better; the smoke volume fraction decreases with the distance between the sprinkler head and ceiling at the height of 5m from the ground. The research findings provide a reference for the smoke suppression of the water mist system and smoke exhaust system in the future.
Tourist Behavior Recognition Through Scenic Spot Image Retrieval Based on Image Processing
Authors: Bai Shizhen , Han Fuli
Published: October 2020

The monitoring of tourist behaviors, coupled with the recognition of scenic spots, greatly improves the quality and safety of travel. The visual information is the underlying features of scenic spot images, but the semantics of the information have not been satisfactorily classified or described. Based on image processing technologies, this paper presents a novel method for scenic spot retrieval and tourist behavior recognition. Firstly, the framework of scenic spot image retrieval was constructed, followed by a detailed introduction to the extraction of scale invariant feature transform (SIFT) features. The SIFT feature extraction includes five steps: scale space construction, local space extreme point detection, precise positioning of key points, determination of key point size and direction, and generation of SIFT descriptor. Next, multiple correlated images were mined for the target scenic spot image, and the feature matching method between the target image and the set of scenic spot images was introduced in details. On this basis, a tourist behavior recognition method was designed based on temporal and spatial consistency. The proposed method was proved effective through experiments. The research results provide theoretical reference for image retrieval and behavior recognition in many other fields.
Chaotic Systems Based Real-Time Implementation of Visual Cryptography Using LabVIEW
Authors: Bulut Gülden Günay , Çatalbaş Mehmet Cem , Güler Hasan
Published: October 2020

In recent years, chaotic systems have begun to take a substantial place in literature due to increasing importance of secure communication. Chaotic synchronization which has emerged as a necessity for secure communication can now be performed with many different methods. This study purposes the Master-Slave synchronization via active controller and real time simulation of five different chaotic systems such as Lorenz, Sprott, Rucklidge, Moore-Spiegel, Rössler. Master slave synchronization was performed because of synchronization realized between the same type of chaotic systems with different initial parameters and also because of the systems were expected to behave similarly as a result of synchronization. Active control method was used to amplify the difference signal between master and slave systems which have different initial parameters and to return back synchronization information to the slave system. The real time simulation and synchronization of the master and slave systems performed successfully in LabVIEW environment. Furthermore, for the real time implementation, analogue outputs of NI-DAQ card used and real time results also were observed on an oscilloscope and secure communication application using sinusoidal signal and an image encryption application achieved successfully.
Ensino do futebol nas licenciaturas dos cursos de Educação Física da grande Porto Alegre/RS
Authors: Da Silva Gilberto Ferreira , Balzano Otávio Nogueira , Rodrigues Abraham Lincoln De Paula
Published: October 2020

O Brasil é reconhecido mundialmente pelo futebol arte, sendo o único país pentacampeão mundial. Trata-se de uma pesquisa teórica, que teve, como temática investigativa, a análise das ementas das disciplinas de futebol de 9 cursos de licenciatura em Educação Física da grande Porto Alegre/RS, objetivando-se verificar, se está sendo contemplado o aspecto sociocultural do futebol, mais especificamente o protagonismo do afro-brasileiro no esporte. Os resultados mostraram que apenas 3 cursos abordam a história do futebol no contexto sociocultural, todavia sem citar o protagonismo do afro-brasileiro no esporte.  Nos outros 6 cursos, aparecem, em suas ementas, somente a visão prática do futebol, abordando-se a tática, os fundamentos técnicos, as regras, as metodologias de ensino, planejamentos e estratégias de jogo. Os achados corroboraram a hipótese de que as ementas são compostas por conhecimentos e metodologias hegemônicas de ensino. Estudar o futebol, sob a ótica da Educação Física, é dispor-se a ultrapassar a racionalidade científica e a não referir-se somente ao treino, a competição e ao incentivo ao seu consumo como mercadoria. É importante estudar o futebol a partir de uma intenção pedagógica com a perspectiva de contribuir para a educação integral do homem e o processo de inserção do afrodescendente no mundo.
A indisciplina escolar na percepção dos profissionais da área da educação
Authors: Reis Daniela Castro dos , Caes Noemia Pereira , Silva Vanusa Dos Santos
Published: October 2020

O conceito de indisciplina pode ser entendido a partir da ideia de negação, rebeldia e resistência às normas estabelecidas pela instituição de ensino. Este trabalho teve por objetivo identificar as principais causas da indisciplina e apontar os possíveis fatores para minimizar este fenômeno no contexto escolar. A pesquisa foi realizada em dois municípios localizados no sudeste paraense, tendo como participantes 17 profissionais. A pesquisa seguiu uma abordagem qualitativa e utilizou-se como método de pesquisa um questionário com perguntas semiestruturadas. Os resultados apontaram que entre as principais causas sinalizadas pelos profissionais a família aparece em ambos os municípios. Para minimizam a indisciplina no contexto escolar, alguns fatores foram identificados: estrutura física da escola, ambiente limpo, vigilância nas salas, ambiente relacional funcional, entre outros. Percebe-se que a indisciplina é um fenômeno corriqueiro e que cada vez mais necessita ser estudado para encontrar possíveis meios de intervenções o serem aplicadas pelo profissional adequado.
FolcloLibras: cantigas de roda acessíveis para surdos
Authors: Ferreira Alessandra Teles Sirvinskas , Braz Ruth Maria Mariani , Melo Isabel Cristina Nonato de Farias
Published: October 2020

As vivências junto aos alunos no setor de Educação Infantil no Instituto Nacional de Educação de Surdos (INES), com crianças de 2 a 5 anos, tornaram perceptíveis o quanto a música, embora não ouvida, estava presente nos alunos como em qualquer pessoa ouvinte. Surgiu assim o interesse de trabalhar a dança e a música, em especial, as cantigas de roda com os alunos surdos. O objetivo desta pesquisa foi o de produzir material didático audiovisual que auxilie o professor no processo de ensino das cantigas de roda para alunos surdos. Para isso, foram produzidos 5 vídeos de 5 cantigas de roda, todas foram traduzidas para Libras e, foram adaptadas histórias ilustradas para explicar, dentro de um contexto, o significado das músicas, ensinando novos sinais. Os vídeos foram aplicados nas crianças de 4 a 5 anos do INES. Como resultado, observou-se que os alunos conseguiram expressar o conteúdo apresentado através da teatralização e do uso de sinais, bem como conseguiram transformar as brincadeiras, criando novas regras e demonstrando criatividade e imaginação. Os vídeos foram disponibilizados, de forma gratuita e de livre acesso, em um canal do Youtube intitulado FolcloLibras.
Проблемы межбюджетных отношений в России и пути их решения
Authors: Косов Михаил Евгеньевич
Published: October 2020

Система межбюджетных отношений и финансовая поддержка регионов в России сформировалась на текущий момент в результате продолжительных реформ, в ходе которых были решены многие противоречия. Однако существует ряд проблемных вопросов, которые требуют изменения механизмов предоставления финансовой поддержки регионам. Объектом исследования являются формы финансовой поддержки регионов. В качестве предмета исследования выступает механизм предоставления финансовой помощи субъектам Российской Федерации. Исследование проводилось с применением диалектического метода познания, который реализован при помощи таких общенаучныхприемов, как дедукция, индукция, анализ и синтез, сравнение, сбор и изучение данных, синтез теоретического и практического материала. В ходе исследования также применялись инструменты эконометрического моделирования. Методологическим и практическим аспектам предоставления финансовой помощи субъектам посвящено большое количество зарубежной и отечественной научной литературы, которое стало теоретической базой исследования. В работе использовались нормативные правовые акты Российской Федерации, регламентирующие процесс распределения доходных и расходных полномочий, а также перераспределения средств из федерального бюджета. Результатами исследования стали выводы о том, что действующая система выравнивания не реализовала себя вполной мере, причиной чего может служить недостаточная степень учета региональных особенностей и интересов. Возможным является применение опыта Канады и Германии в части замены некоторых трансфертов доходами от налогов. Такое решение возможно реализовать и в рамках механизма распределения доходов между бюджетами бюджетной системы.
Analysis of Thermal Effects of Roof Material on Indoor Temperature and Thermal Comfort
Authors: Lapisa Remon , K Arwizet , Martias - , Purwantono - , Wakhinuddin - , Suparno - , Romani Zaid
Published: October 2020

The indoor thermal comfort is one of the key factors in designing an energy-efficient sustainable building. In the tropics, ensuring indoor thermal comfort using air conditioning systems is the primary cause of the high energy consumption of buildings. This thermal comfort is greatly affected by the characteristics of the building envelope material, including the roof. Zinc roofing sheet is the most common roofing material used in Indonesia because of its lightweight and easy installation. However, it is corrosive, and it has a high thermal conductivity that can lead to overheating in the room. In order to improve indoor thermal comfort, it is necessary to find alternative, environmentally friendly building roofing materials. The purpose of this experimental study is to analyze and evaluate the effect of the type of roofing material on rooms’ temperature profile and indoor thermal comfort level. Temperature measurements are carried out for three consecutive days on three prototype buildings with the one-twenty scale with different roofing materials: zinc plate, bamboo, and sugar palm fiber called Ijuk. In each building, four temperature sensors connected to a temperature data logger are placed at the rooftop surface, attic zone, bedroom, and living room. The measurement results show that the type of roofing material has a significant impact on the indoor temperature profile and comfort level both day and night. Considering the thermal performance shown by the results of the study, Ijuk can be a rational choice as a roofing material for residential houses in tropical climates.
Titanium Dioxide Nanorods as An Effective Blocking Layer in Solar Cells
Authors: Nursam Natalita M. , Shobih - , Pandanga J. , Wang Xingdong
Published: October 2020

Blocking layer holds a crucial function in dye-sensitized solar cells (DSSC). It essentially prevents recombination from occurring between electrons in the photoanode and the oxidized dye molecules within the electrolyte. Furthermore, this layer could strengthen the connection between the conductive substrate and the photoanode layer. Herein, titanium dioxide (TiO2) nanorods were applied as a blocking layer in DSSC, and the solar cell performance was subsequently compared with the cells containing conventional TiO2 nanoparticles blocking layer. The TiO2 nanorods were grown from titanium isopropoxide (TTIP) solution via the hydrothermal method for various durations, i.e., 30, 60, and 120 min. Meanwhile, the TiO2 nanoparticles blocking layer was deposited via the wet chemistry method by hydrolyzing titanium (IV) chloride (TiCl4). The morphology and structure of both types of blocking layers were compared, whereas the electrical properties of the solar cells were analyzed using incident photon-to-current conversion efficiency (IPCE) and current-voltage (I-V) characterization. It was found that different hydrothermal time resulted in TiO2 nanorods with different morphologies. The application of TiO2 nanorods blocking layer that was grown for 120 min led to a photoconversion efficiency of 3.29%, which was 8.2% and 4.4% higher than the photoconversion efficiency of cells without the blocking layer and with TiO2 nanoparticles blocking layer, respectively. Our results indicated that the blocking layer with a TiO2 nanorods structure could facilitate better electrons transfer than that of nanoparticles.
Is Technical Competency Necessary for Client Project Manager? An Empirical Study of Commitment-making Officers (PPK) in Indonesian Public Construction
Authors: Negara Kartika P , Lamari Fiona , Susilawati Connie , Trigunarsyah Bambang
Published: October 2020

Public construction in Indonesia still suffering failure in the last few decades. Evidence shows that one of the source factors to public construction failures was a lack of technical-area understanding in Commitment-Making Officers (Pejabat Pembuat Komitmen, PPK). Moreover, since PPK has various academic disciplines, evidence shows that many PPK from local government agencies are reluctant to be assigned as a PPK because they are concerned about their lack of understanding of basic construction knowledge and its consequences. This paper aims to identify the importance level of PPK's technical competency in managing public construction projects. In this study, self-administered questionnaires were distributed to PPK from East Java, Southeast Sulawesi, and Gorontalo provinces, and interviews were conducted to confirm the results. The findings show that having technical competency is necessary for PPK regardless of their academic disciplines. However, they do not need to understand every single detail of the construction project, but they are expected to understand a big picture of construction methods that enable them to act as a knowledgeable contributor in the construction delivery. This study contributes to the existing knowledge of project manager competency by providing insight into project manager from the client-side in the public construction projects.
Experimental Studies of Wind Flow Inside a Street Canyon Between High-Rise Buildings with Angle of Attack Modifications
Authors: Priambodo Doni , Sanjaya Yongky , Sarli Prasanti Widyasih , D Setio Herlien
Published: October 2020

Failures of smaller structures located in between high-rise buildings due to wind have been observed. Further research on urban wind is needed o prevent further incidents. This research aims to investigate the wind flow in a street canyon of a cluster of 4 simplified symmetrical high-rise buildings with the angle of attack of 0o, 30o, and 45o. The study uses Particle Image Velocimeter (PIV) and Low Speed Wind Tunnel for the experiment. The results show that the flow at all angles can be defined as interaction flow, identified by two corner streams at the front passage entrance corner that interacts and merge into a single wide passage jet. The angle of attack changes the pattern of the flow in the cross-area. Before entering the passage, wind-blocking reduces the wind speed up to 40%. After entering the front building passage, its amplification rises to 6.9% above its original value at the angle of 0°, at the angle 30°, and 45° after entering it did not increase to its original value; the highest amplification rate occurred at 0o. At the angle of 30° and 45°, an extremely low wind speed region occurs in the cross area, which did not happen at 0°. It can be concluded that more complex patterns of building clusters lead to more vortex and turbulence in the cross area, which leads to decreasing speed. A “clashing point” from two flows (left and right passage) in its cross-section also leads to a higher turbulence rate in the cross area.
Increasing the Displacement Ductility Factor of Spun Pile Using Concrete Infill
Authors: Irawan Candra , Faimun - , Djamaluddin Rudy , Putu Raka I Gusti , Suprobo Priyo , Soeprapto Gambiro
Published: October 2020

Displacement ductility is one of the parameters used to measure the seismic performance of a structure. This study experimentally determines the increase in displacement ductility of the spun pile with 400 mm of outer diameter and 100 mm of wall thickness using concrete infill cast inside the hollow of the pile. The spun pile and concrete infill's concrete compressive strength was 54.4 MPa and 33.0 MPa, respectively. Loading was conducted with constant axial and reversed lateral flexural loads. A total of six samples were tested with different axial loads of 392 kN (0.08fc'Ag) for S-DB-1, S-DB-2, S-DB-5, and 784 kN (0.16fc'Ag) for S-DB-3, S-DB-4, S-DB-6 with the reverse flexure load applied in the middle span of the pile. The results showed spun piles with concrete infill could resist the flexural load combined with axial loads until the displacement ductility 5.8 for P0 = 0.08fc'Ag, and 3.7 for P0 = 0.16fc'Ag, respectively. Compared with the ordinary spun piles, which had a hollow section, the presence of concrete infill due to the presence of the concrete infill the displacement ductility increased by 18% when loaded with 0.08f'cAg and 42% at 0.16f'cAg of axial loads. In conclusion, according to seismic codes, displacement ductility evaluation showed that tested piles for plastic concept design applications are appropriate for moderate seismic risks category state under axial loads of 0.08fc'Ag. The increasing of the axial load becomes 0.16fc'Ag decreasing the displacement ductility to become less than 4, applicable for low seismic risks category state.
The Modelling of Volume and Percent Duration of Vehicle Parking for Shopping Stores in Surabaya, Indonesia
Authors: Gde Kartika Anak Agung , Mochtar Indrasurya B , Widyastuti Hera
Published: October 2020

Both parking revenue and parking tax are the potential income for most local authorities in Indonesia since they are considered as part of their revenue. However, currently, many local authorities in Indonesia, including Surabaya, have a problem determining the target of annual parking revenue.  Meanwhile, there are growing public and private facilities in many capital cities in which many parking spaces will be provided to support their activities later. Therefore, the providing of new parking spaces will potentially contribute to the local authorities’ revenue as the consequences. The main variable to contribute to the parking revenue is the number of parked vehicles and the parking duration (progressive tariff is applied). This paper discusses parking modeling of shopping stores in Surabaya. The parking volume model is based on the following variables; accumulation, turnover, dynamic capacity, parking index, and average duration, while the model of duration is based on these following variables; accumulation, turnover, dynamic capacity, parking index, and parking volume. Since all variables has a multicollinearity problem, the model principal component regression is then used. This paper proposes the model of volume as well as percent duration of parking facility for shopping stores based on data in Surabaya.
The Effect of Cooking Method on the Nutritional Characteristics of “Dendeng Kariang” as a Traditional Minangkabau Food
Authors: Rini - , Nanda Ririn Fatma , Syukri Daimon , Derosya Vioni
Published: October 2020

This study aims to determine the effect of cooking methods on the nutritional characteristics of dendeng kariang. After preparations, dendeng kariang was fried in vegetable oil by using two methods of frying. The methods are the vacuum frying method (75oC) and the conventional frying method (175oC). Protein characteristics are evaluated by analyzing the total protein content, amino acid profiles (UPLC), protein profiles (SDS-PAGE), and fatty acid profiles (GC-MS). The results showed that the vacuum frying method had higher total protein content (63.78%). All amino acid profiles are higher in the vacuum frying method than the conventional frying method, respectively 674,487.98 mg/kg and 629,588.51 mg/kg. The protein profiles showed that the vacuum frying method had 14 polypeptide bands, while conventional frying had 15 polypeptide bands. Total fat content with the vacuum frying method was found higher than conventional frying, respectively 18.16% and 10.65%. The fatty acid profile showed that the vacuum frying method had higher unsaturated fatty acid content, which is oleic acid 3.8297%, linoleic acid 0.9448%, and linolenic acid 0.0207%, while the conventional frying method had oleic acid 3.4996%, linoleic acid 0.9297%, and linolenic acid 0.0197%. The total unsaturated fatty acid in the vacuum frying method is higher than the conventional frying method, respectively 5.0166% and 4.6541%. These numbers concluded that cooking methods affect the nutritional characteristic of dendeng kariang, and the vacuum frying method had better nutritional characteristics.
Tire Pressure Monitoring System Using an Android Application
Authors: Robles Algarín Carlos , Pinto Jullbreider , Giraldo Edgar
Published: October 2020

Driving a vehicle with inadequate tire pressure can generate more ground friction, causing an increase in fuel consumption and, therefore in CO2 emissions. Another consequence is uneven tread wear, affecting braking distance and vehicle control. This paper presents the implementation of a Tire-Pressure Monitoring System (TPMS), which is a system that alerts the driver of a vehicle about a tire pressure change. For this, four prototypes were designed to monitor and transmit the tire pressure and temperature of a vehicle. For the transmitter circuits design, ATmega328 microcontrollers, NRF24L01 transceiver modules, Honeywell NBP series pressure sensors and LM35 temperature sensors were used. In addition, a receiver that incorporates an NRF24L01 module to receive the signals coming from the transmitters was developed. The received data are sent via Bluetooth, with the HC-05 module, to an Android application developed in App Inventor, which is an open-source web application. To install the circuits on the tires, compact cases were designed in Solidwork, which were printed using the Prusa i3 3D printer. The results obtained demonstrate the effectiveness of the monitoring system and the accuracy of the measured data, as well as the relevance of the Android application to alert the driver in a simple way about any pressure change in the tires. These results suggest the possibility of using the prototype developed in realistic scenarios to monitor tire pressure in vehicles without this technology.
The Study of Floating Nuclear Power Plant Reactor Core Neutronic Parameters Using Scale 6.1 Code
Authors: Fajri Dhirar Faisal , Agung Alexander , Harto Andang Widi
Published: October 2020

KLT-40S nuclear reactor is a small modular floating nuclear power plant made by Russia as a conventional light water reactor (LWR) problem solution nowadays, such as high overnight cost, long commissioning period, and lack of flexibility in supplying a small load of electricity and supplying electricity to isolated areas. With those characteristics, the KLT-40S is suitable to be applied to isolated areas with a small electrical load like archipelagic states such as Indonesia. Based on that reason, Indonesia needs to assess the KLT-40S floating nuclear power plant feasibility study through explorative research. One of those is assessing the reactor core neutronic parameter. In this research, the reactor core modelling is done by using the KENO VI-A and T-6DEPL module in SCALE 6.1 code package. Several variations of reactor operating parameters such as fuel composition and configuration, fuel temperature, moderator temperature, and moderator void fraction had been done in this research. The aim was to get several neutronic parameters to confirm the core feasibility from operational and inherent safety perspectives. Those neutronic parameters are fuel cycle length and reactivity feedback coefficient of fuel temperature, moderator temperature, and moderator void fraction. Based on this research result, the fuel configuration that produces 28 months of cycle length is the fuel base of dispersed UO2 in the silumin matrix with 18,6 % 235U enrichment. Both of the two fuel bases used in this research have inherent safety characteristics, which are shown by the negative value of the reactivity feedback coefficient of fuel temperature, moderator temperature, and moderator void fraction.  Dispersed UO2 in the silumin matrix fuel base has better inherent safety characteristics than the UO2 ceramic metal fuel base.
Analysis of the Effect of Intake Valve Fin Adding of Dual Fuel Engine on the Performance-Based Experiment
Authors: Semin - , Bakar Rosli Abu , RFC Linggar Palang Aras
Published: October 2020

The modification of diesel engine into the dual-fuel engine or specifically gas - oil fuel engine has been done to solve the problem of the depletion fossil fuel oil reserves in the world. Fossil fuel oil reserves are projected to be exhausted in the next 50 years or less by prediction. The working system of the gas - oil fuel engine was injecting (gas fuel) to combustion chamber along with the air during the suction step in the intake manifold and burned with the diesel as the lighter. The gas fuel was used here is CNG (Compressed Natural Gas). But the performance of the engine when using the addition of gas fuel has decreased. The modification, like the addition of fixed fin in the air intake valve, is done to increase the swirl ratio. So, that turbulent flow of air comes in along with the gas fuel to be better. As a result, the combustion process in the combustion chamber got better. By applying a fixed fin addition into the air intake valve gas-oil fuel engine, it can increase engine performance better. The power generated by the engine with fin adding increases at maximum load. While torque of engine with fin adding increased in maximum load condition. For specific energy consumption (SEC) has been decreased impact of the fin, adding on the air intake valve.
Mapping Gaseous Pollutant Using Quadcopter on Autonomous Waypoint Navigation
Authors: Rivai Muhammad , Dikairono Rudy , Priyanta Irfan Fachrudin
Published: October 2020

Air pollution is a condition in which air quality is damaged and contaminated with substances that are harmful to living things. Along with the increase in the number of motorized vehicles and industrial areas in Indonesia can increase the level of air pollution. Generally, monitoring systems for air pollution are carried out using gas sensors at certain points. However, this method takes a lot of time and cost, as well as low spatial resolution for a wide area. The quadcopter is a type of Unmanned Aerial Vehicle that can move automatically according to the tracking system based on the waypoints of the Global Positioning System. In this study, a quadcopter equipped with a gas sensor is used to map air pollution levels. Mission Planner software is used to determine the waypoints of the quadcopter. The proportional-integral-derivative (PID) control is used to maintain the altitude of the quadcopter while hovering. The gas level can be stored and accessed online on the webserver, in which the results of the gas mapping are displayed on Google Earth. The experiment results show that the measurement of carbon monoxide using the semiconductor gas sensor has an error of 9.6%. The quadcopter can route all the provided waypoints for its navigation. The quadcopter can also maintain the height according to the offered altitude setpoints with a steady-state error of 21.4 % and 15.75%, respectively.
Spatial Model of Traffic Congestion by the Changes on City Transportation Route
Authors: Supriatna S. , Dimyati M. , Amrillah Dede
Published: October 2020

Traffic congestion is a problem for every city in Java Island, Indonesia, including Bogor City. Factors causing congestion in Bogor City are thought to come from land use, the geometry and performance of road, and public transport routes (urban transport). The change of urban transportation (angkot) route carried out by Bogor City Government aims to reduce traffic density and congestion, but it is not a guarantee that the main problem will be solved. This study aims to determine the spatial patterns of traffic density and congestion with current angkot routes and to construct a model to predict traffic density and congestion when new angkot routes are used. Variables in this research are land use (number of schools and markets/malls), geometry and performance of road (vehicle volume, road capacity, average velocity, road type, number of lanes, number of signalled and non-signal intersection), and an angkot route passing a road. The method used in modelling is multiple regression using one dummy variable and a stepwise regression method. The result of modelling shows that the variables affecting traffic density are velocity, some signalled and non-signal intersection, and angkot route with R2 value 66.9%. At the same time, the influential variables in the traffic congestion model are vehicle volume, road capacity, number of the signalled intersection, and angkot route with R2 value 81.4%. To see accuracy in predicting model of traffic density and congestion, Mean Absolute Percentage Error (MAPE) validation is used. The results show a value of 12.46% for traffic density, which means that the model has good prediction accuracy and 5.62% for traffic congestion, which means the model has high prediction accuracy. Thus, in this study, the land use of school and market is not a factor causing traffic density and congestion, while the geometry and performance of roads and public transportation routes as a factor causing congestion.
Partial Centroid Contour Distance (PCCD) in Mango Leaf Classification
Authors: Prasetyo Eko , Adityo Raden Dimas , Suciati Nanik , Fatichah Chastine
Published: October 2020

The research in the classification of mango leaf varieties requires appropriate features and classification methods to achieve high accuracy. The system used 263 features, texture and color features included Boundary Moments features that generated from Centroid Contour Distances (CCD). The CCD measures distance from center to the edge along 360 degrees, this causes enormous computational loads. On the other hand, the final part of mango leaf to recognize the mango varieties simply by observing the leaf base and leaf tip, so the mango leaf as the special case of CCD can be solved by only generating features at these parts. We propose Partial CCD (PCCD) by calculating the distance from boundary point does not to the center point of the leaf but to the midpoint-cut of the leaf base or leaf tip. PCCD has two parts, PCCD Leaf Base and PCCD Leaf Tip to capture leaf base and leaf tip features, respectively. On experiment testing with PCCD or another color, shape, and texture features only, the system can’t achieve high accuracy, but the combination of all features increase accuracy up to 10%. The comparison among all various features are used in classification. It is compared the original features, individual PCCD features (Leaf base and Leaf tip), and combination of Leaf base and Leaf tip. These results show that combination of original features and PCCD features achieve the best accuracy 80.17% and average accuracy 78.41%. The highest accuracy performance obtained by SVM classification is 81.73%. The comparison with other features also proved that the combination obtains better performance.
A Novel Fuzzy Linguistic Fusion Approach to Naive Bayes Classifier for Decision Making Applications
Authors: Femina Bahari T. , Elayidom M. Sudheep
Published: October 2020

Naive Bayes is one of the most widely used classifier algorithms in various data mining problems. The performance of the Naí¯ve Bayes Classifier is comparable to other classifiers as it yields impressive results in multiple applications. An increase in the performance of the Naive Bayes Classifier is possible by identifying and forming segments of the data handled by the classifier. In this paper, a novel fuzzy-based fusion approach to selected quantitative features is proposed. The approach is used to improve the prediction accuracy of the Naive Bayes Classifier (NBC). The linguistic computing model with fusion operators, using ranked indexes of the linguistic terms in the dataset is made use in this proposed approach. Fuzzy values are generated only for the numerical attributes in the initial phase using 2-tuple linguistic computations. The equivalent real value computations are performed in order to express the results in the initial domain of the expression. These computations ensure improved comprehensiveness of the results of the classifier. The model incorporates the concepts of linguistic terms, fuzzy logic, fusion methods, and aggregation operations to the classical Naí¯ve Bayes Classifier. Such incorporation is used to improve the performance of the classifier in various decision-making applications. The proposed model is validated using a standard benchmark dataset-Stat log Heart disease dataset. It is obtained from the UCI Machine Learning Repository. The proposed Linguistic Fuzzy Naive Bayes Classifier showed better accuracy compared to the Simple Naive Bayes Classifier performance.
Fruit Identification and Quality Detection by Means of DAG-CNN
Authors: Pachón-Suescún Cesar G. , Pinzón-Arenas Javier O. , Jiménez-Moreno Robinson
Published: October 2020

The design of quality control systems in food has become essential in research to guarantee an adequate state for its consumption. It is necessary to develop automatic and efficient systems that can verify its state before its distribution. This paper presents an algorithm based on deep learning for the identification of fruits and the state they are in, oriented to changes in camera focus, capture angles, lighting variations, and change of backgrounds. In this case, 8 types of fruit are chosen to identify what kind of fruit is being observed and if it is in good condition or not, establishing a total of 16 categories that the network must classify. A convolutional neural network with a DAG structure is proposed for the learning of fruits and their state. A graphic user interface is designed to allow the acquisition of the image of the fruit and its subsequent classification in some of the categories. A 94.43% accuracy was obtained in the 1600 test images classification, with approximate processing times of 45-55 milliseconds. Therefore, it can be concluded that the proposed system based on Deep learning can adequately perform a process of detection of types of fruits and their state.
Asynchronous Non-Blocking Algorithm to Handle Straggler Reduce Tasks in Hadoop System
Authors: Khoiruddin Arwan A. , Zakaria Nordin , Alhussian Hitham Seddig
Published: October 2020

Hadoop is widely adopted as a big data processing application as it can run on commercial hardware at a reasonable time. Hadoop uses asynchronous blocking concurrency using Thread and Future class. Therefore, in some cases such as network link or hardware failure, a running task may block other tasks from running (the task becomes straggler). Hadoop releases are equipped with algorithms to handle straggler tasks problem. However, the algorithms manage Map and Reduce task similarly, while the straggler root cause might be different for both tasks. In this paper, the Asynchronous Non-Blocking (ANB) method is proposed to improve the performance and avoid the blocking of Reduce task in Hadoop. Instead of using the single queue, our approach uses two queues, i.e. task queue and callback queue. When a task is not ready or detected as a straggler, it is removed from the main task queue and temporarily sent to the callback queue. When the task is ready to run, it will be sent back to the main task queue for running. The performance of the algorithm is compared with rTuner, the latest paper found on handling straggler task in Reduce task. From the comparison, it is shown that ANB consistently gives faster time to complete because any unready tasks will be directly put into the callback queue without blocking other tasks. Furthermore, the overhead time in rTuner is high as it needs to check the straggler status and to find the reason for a task to become straggler.
Adoption Model of Water Filter by The Society of Lake Water Users in Dry Land Area, Gresik, East Java, Indonesia
Authors: Kusdarini Esthi , Yanuwiadi Bagyo , Hakim Lukman , Suyadi Suyadi
Published: October 2020

North Gresik is a dry land area. The primary water source is lake water. The analysis result showed that lake water contained the contamination of ammonia, iron, manganese, organic matter, and a coliform total exceeding standard quality. This condition could endanger local societies. A water process was needed to remove water contamination and improve water aesthetics. In this study, the researchers were choosing a water filter as Water treatment tool. This tool used three media; manganese greensand, zeolite, and active carbon. This tool had an excellent performance to reduce lake water contamination, practical to use and affordable price. This research built Structural Equation Modeling (SEM) to identify the factors and variables which were influencing water filter adoption by societies. Data collection was conducted by distributing questioners to 248 respondents. The finding showed that the behavior of tool accepting was the most take positive effect to tool adoption (path coefficient = 0.320), following governments' role path coefficient = 0.276) and infrastructure (path coefficient = 0.157). Behavior acceptance was a tool as mediate the relationship of society's perception to tool adoption and to mediate the relationship between institutional and tool adoption. The resulting model was included moderate because it was able to explain about 36.7% from variable variants in tool adoption. The variables, finding which influenced tool adoption in positive and significant effect, both directly and indirectly, were input, for the decision-maker (government) and local lake water process in making policies and developing work programs for sustainable water supply.