bluuebunny/crossref_metadata_2025 huggingface dataset:
An investigation on thermal behaviour of Sevelamer Carbonate and non-isothermal decarboxylation kinetics using TGA to obtain activation energy and pre-exponential factor
Authors: Mahendran K , Jha Anjali , Aliada Ravikiran , Vakkala Sudhakar , Batna Ravibabu
Published: December 2020

Sevelamer carbonate (SC) is a phosphate binder used to treat chronic kidney disease patients to remove excess phosphate. It is an insoluble drug and thus cannot be absorbed into the systemic circulation, so the in vivo bioequivalence studies cannot be performed. The USFDA, therefore, recommends in vitro phosphate binding tests and API-sameness tests to show the interchangeability of generic variants of the sevelamer carbonate tablets. The API-sameness mentions a variety of physicochemical characteristics including carbonate content. In this work, we studied the decarboxylation characteristics using thermal techniques (DSC & TGA). We have determined the activation energy and pre-exponential factor (Arrhenius parameters-Ea
and A) that of the decarboxylation using nonisothermal kinetics of decarboxylation in combination with a well-accepted Coats-Redfern model-fitting method. A total of 13 different models were tested of solid-state reaction in which the second-order model suits best with an excellent correlation of 0.9926. The resultant values of the Ea
and A are 25 kcal/mol and 1.23007 × 1012 Sec-1, respectively. The comparison of decarboxylation activation energy values may offer additional assurance on the API-sameness, in addition to comparing carbonate content alone.
A Method of Transforming Plain Text into Cipher Text using Gear Graphs and Product Cordial Labeling
Authors: Uma Maheswari G , Umamaheswari M S , Muthusamy Ramya
Published: December 2020

This research article includes the development of encoding technique of ordinary text with the help of Gear structure Gn
by using vertex multiplications, the graph Gn
is vertex product cordial for n not even and there is no vertex product cordial labeling for n even. By using three graphs G
5,G
7 and G
11, illustrations are given for converting Text in to Matrix and developed flowchart for coding technique. At present the encoding method includes computer algorithm techniques, but here the researcher develp a new method of coding without computer knowledge.
Fuzzy logic controller based priority model for VANET scheduling
Authors: Anusuya K V , Sakthi Priya M
Published: December 2020

Designing a reliable Vehicular Adhoc Network is challenging, due to the critical constraints in providing reliability with ensured data delivery and minimal latency simultaneously. Here, a fuzzy-based congestion control technique, to minimize latency and packet loss for high priority safety messages is proposed. Fuzzy logic is employed to provide multi-level priority assignment to the vehicles contending for channel access. Based on this priority, the queued messages in the Cluster Head are scheduled. NS-2 simulations prove that this technique improves the packet delivery and minimizes packet loss and channel access delay compared to cognitive radio based implementations at largely densed vehicular network.
An isolated photovoltaic power generation system with a novel fractional order PID controller based control strategy
Authors: Aseem K , Selva Kumar S
Published: December 2020

The renewable energy resources such as photovoltaic systems have major role in the development of sustainable energy systems. An efficient controller for standalone photovoltaic system based on fractional calculus is proposed in this work. The power extracted from the PV systems are continuously varies with respect to the dynamic changes of solar irradiance value and climate temperature. Here we introduce a Maximum Power Point Tracking (MPPT) algorithm is which realized with the support of Fractional Order PID (FOPID) controllers to extract the maximum possible power from the Photo Voltaic(PV)modules. The PID controller and FOPID controllers are also ensures the constant dc bus voltage and hence the ac output voltage at become stable. The effectiveness of the controller are compared using various performance time domain specifications like overshoot percentage, rise-time, settling-+time, etc. The various analysis were done under the variation of irradiance and temperature in MATLAB Simulink platform. The FOPID controller give improved performance compare with conventional PID controllers.
Application of deep learning and compressed sensing for reconstruction of images
Authors: Hanumanth P , Bhavana P , Subbarayappa Shreyanka
Published: December 2020

Compressed sensing (CS) is a technique in signal processing which reconstructs any given signal at a rate less than that of Nyquist’s’ rate given that the signal is sparse and incoherent in nature. The main focus of CS is to find a random matrix which reconstructs the original signal using as few samples as possible. In recent years there has been a lot of interest in using CS to reconstruct 2D images. Several machine learning and deep learning algorithms have been proposed for finding the random matrix. However, using deep learning techniques to generate the random matrix is still an emerging concept. There are several papers exploring the concepts of deep learning with compressed sensing for images and have produced promising results. The results obtained in these papers warrant a comparison to analyze their performances against more traditional methods to determine the best approach to reconstruct images. These results are also compared with the popular JPEG and JPEG2000 codecs. This paper focuses on surveying deep learning algorithms for reconstruction of images using CS. The comparison reveals that deep learning algorithms perform significantly better than traditional methods and perform well when compared to any image compression codec like JPEG. Possible methods to improve the existing algorithms have been suggested.
Agriculture automation system
Authors: Choudhary Rakesh , Rajarathnam M , Alekya M , Prithiv Hari K , Selva Kumar S
Published: December 2020

Agriculture is one of the very old human occupation, but it is not a stranger to automation. The world population is increasing exponentially and with it comes the need to produce more food. Conventional method requires more manpower and water. This paper deals with a scaled down model of an agriculture automated system. The hardware employs linear guides in the x, y and z directions that allow agricultural process like seed injection, humidity sending and watering with required precision there by maintaining the crop and soil economically. The whole system is fully controlled and automated from the sowing of seeds to watering them. The hardware developed was tested for its functioning with the scaled down plantation model integrated toit.
A wideband probe-fed low cost mm wave fractal antenna array for 5G
Authors: Shet Krishnananda , Karthikeya G S , Suraj H S
Published: December 2020

Antennas for 5G needs to be compact, low-cost and of broad band. The proposed antenna is a co-axial fed Sierpinski fractal antenna of 1stiteration which satisfies most of the important requirements for prospective 5G cellular communication. The proposed design has broad impedance bandwidth of 2.6 GHz at resonant frequency of 28.2 GHz and suitable radiation pattern for beam steering. Various characterization studies are performed to achieve beam steering. An L-shaped array of the proposed antenna is designed for this purpose. This array is also placed on a generic smartphone mock-up and the radiation pattern is characterized.
Vehicle wheel detection using micro doppler effect
Authors: Pradeepth S , Peeyush K P
Published: December 2020

With the advent of autonomous driving, safety have become the top priority. To adhere vehicle safety standard for autonomous vehicle, the sensors play the primary role in sensing the environment. With high frequency resolution radar, micro motions of the vehicle wheel can be detected. Time-Frequency distribution is used to detect the frequency changes with respect to time. MUSIC is a high resolution direction finding algorithm, which can estimate the direction of arrival of echo signals. Micro Doppler effect provides the vehicle wheel information related to the number of spokes and its spoke size. With this information, it is possible to detect the exact position of the wheels in the vehicle.
Study of the Concrete Production Process -A graph theoretic approach
Authors: Sangeetha P , Shanmugapriya M , Sundareswaran R , Sowmya K , Srinidhi S
Published: December 2020

The selection of concrete is a challenging task for civil engineers. The choice of concrete is normally arrived upon according to the correlation of the main factors and its co parameters. The civil engineers have to be rationalised in choosing the appropriate concrete for construction with the particular material for the application in order to produce low cost concrete. In this paper, graph-theoretic approach is used to find the best concrete process among the available different processes. The fishbone diagram represents the factors and its cofactors that are involved in the production process of concrete. A digraph characteristic is drawn which represents the factors like fibers, materials, method of curing and Admixture with their cofactors affecting the selection process. Identifying the interdependency of the factors and their inheritances and representing them by using numerical values with a matrix form are carried out in this work for three different processes of production of concrete. Plain Cement Concrete (PCC), Self Compacting Concrete (SCC) and High Strength Concrete (HSC) are considered in order to achieve the quality, strength and cost. This technique is illustrated with an example for decision-making problems when there are multiple alternatives to multiple interdependent factors.
Seismic vibrations of complex relief of the surface of the naryn canyon (on the Norin river in Kyrgyzstan) during large-scale underground explosions
Authors: Safarov I I , Homidov F F , Rakhmonov B S , Almuratov Sh N
Published: December 2020

In this paper the problem of the propagation of seismic blast waves in a deformable half-space with complex free surfaces of the Noryn Canyon (on the Noryn River in Kyrgyzstan) during large-scale underground explosions is discussed. In the explosion, according to a specially developed technique camouflage action charges were used. It was found that, granites in the fault zone are intensely fragmented and fractured. On the plane of the cracks, traces of sliding and friction clay are noticeable. The lowest values of elastic wave velocities are observed in the zones of tectonic cracks and in the surface of the massif. With depth, the velocity increases similarly to the change in fracturing. A theoretical formulation, solution methods and algorithm for the problem of propagation of seismic blast waves in a viscoelastic half-space (with a complex relief of the free surface) are proposed. The aim of the work is to study their dynamic behavior, create a methodology, develop and implement ideas when conducting full-scale experiments and measuring parameters that determine the dynamic behavior of half-space with complex surface and ground rails under seismic and explosive effects. Field experiments and corresponding theoretical studies in this formulation were carried out for the first time.
Enactment of aluminium-fly ash composites
Authors: Choudhury Anup , Nanda Jajneswar , Das Sankar Narayan
Published: December 2020

Aluminium metal matrix composites (AMMCs) augmented with fly ash particulates have brought notable recognition due to their inherent extensive physical, mechanical, tribological, and chemical response towards a number of applications with low cost in current times. Besides that, due to low density (fly ash), it exposes high strength to weight ratio to the metal matrix composite. It is gathered in thermal power plants in huge volumes like solid left-over by-product. The utilization of fly ash as a reinforcement waives the necessity of its disposal and inhibits environmental pollution. The existing paper contributes a comprehensive research analysis on the different performance of the fly ash reinforced aluminium composites manufactured by multiple methods. The current discussion has classified into separate segments according to the needed performance of aluminium reinforced including fly ash particles.
Physicochemical analysis of sugarcane bagasseash (SBA) blended concrete to evaluate the pozzolanic activity of SBA
Authors: Patil Chidanand , Manjunath M , Bandekar Sneha
Published: December 2020

Sugarcane bagasse ash (SBA) is the residue of burnt sugarcane bagasse used as a fuel in the co-generation units. The enormous quantities of SBA obtained as waste material from the cogeneration units can be utilized as a pozzolona.This article presents the investigation on the physical and chemical analysis on concrete made with OPC blended with SBA. Experimental investigation is performed on M30 grade concrete which forms the control mix. SBA blended concrete is obtained by partially replacing the OPC with SBA at different percentages. The workability of the fresh concrete and compressive strength at 7 and 28 days of the control concrete and SBA blended concrete are determined.The particle size distribution, surface area and specific gravity of OPC and SBA were determined using HORIBA zeta analyzer, BET surface area analyzer and Standard Le-chatelier flask respectively. The chemical composition of SBA and OPC was obtained using XRF technique and the mineralogical analysis of SBA was carried out using XRD technique.To evaluate the pozzolanic activity of SBA, the hardened concrete matrix wereanalyzed for their microstructural and chemical composition using SEM and EDS techniques. The compressive strength results indicate that replacement of OPC by SBA upto 20% is beneficial. The SEM images and EDS analysis substantiates the pozzolanicbehavior of SBA at different replacement percentages.
Analysis on the library service quality with analytic hierarchy process model
Authors: Fai Liew Kah , Siew Lam Weng , Hoe Lam Weng
Published: December 2020

Library service is a significant factor for a university to give the public a glimpse on the university education quality. An excellent library can provide a comfortable study environment for the students to concentrate on their learning. Besides that, library should also be a source that the students can easily search for the plenty of updated information that they need. As a result, a conceptual framework based on Analytic Hierarchy Process model is proposed to identify the priority of the main decision criteria and sub-criteria toward the library service quality among the undergraduate students. The results show that information control is the most influential decision criterion, followed by library as place and affect of service. Moreover, the top five most influential sub-criteria are desk and seating availability, Internet/WIFI facilities, cleanliness and beauty, temperature setting, and finally online journal collection. The findings of this study can provide an insight to the library to improve the services in order to satisfy the students’ expectations and needs in the future. This study is significant because AHP model is proposed to determine the quality of the library service with the consideration of the important decision criteria.
Impact analysis of bumper beam to be proposed for Indian passenger cars
Authors: Khedkar N K , Sonawane C R , Kumar Satish
Published: December 2020

Cars equipped with modern devices like rare parking sensor, parking camera, etc. helps in avoiding low-speed impact. However, in reality, these low-speed impacts are still happening very frequently because of no of factors like slow-moving heavy traffic, the experience of the driver during parking the vehicle, etc. The bumpers, which essentially act as low-speed energy absorbers, are provided inthe rear and front side of a vehicle. In the present work, three different bumper beamsare fabricated based on the design parameters obtained during numerical simulation conducted as per low-speed impact guideline of standards of automotive stated in E.C.E. United Nations Agreement, Regulation no. 42 (1994). Theenergy absorption capacity and strength of these bumper beams arenumerically investigated. The numerical simulations are obtained for low-speed pendulum impact test to prove the crashworthiness of the proposed bumper beams.
Influences of welding parameters on friction stir welding of AA 6063 Al-alloy and copper plates – An experimental study
Authors: Sathish D , Veeramanikandan M , Boovendravarman S , Jeryrajkumar L
Published: December 2020

Friction stir welding is a solid state welding technique for the welding of metallic compounds. The Aluminium alloy 6063 and commercially available copper of 6 mm thickness are welded in circular butt joint geometry by friction stir welding (FSW) process, using vertical milling machine. The Friction stir welding was carried out at each rotational speed of 800 rpm and 1000 rpm for different travel speed 20 and 40 mm/min at constant probe depth of 2.9 mm, towards the trailing edge and a dwell time of 3 sec. One of the critical elements for the achievement of this method is the friction stir welding tool. It comprises of a distinct geometry cylindrical shoulder and a pin. The said instrument was intended for friction stir welding of the dissimilar metal plates in the experimental job with cylindrical pin profile. The results have been correlated with the micro structural characteristics at the bond interface using scanning electron microscopy. The results show the characteristics of different types of intermetallic compound formed at the interface derived from energy input.
Studies on the effect of hard segment cross-linking on the polyurethane properties
Authors: Mogha Anupama , Kaushik Anupama
Published: December 2020

The studies focus on the preparation of the polyurethane sheets. Polyurethanes belong to the polymers that have the wide spectrum of applications. The polyurethane based materials are getting worldwide attention and demand, due to their superior properties over the other materials available. The pure polyurethane as well as cross linked polyurethane sheets was prepared using the polymerization process. The prepared polyurethanes were characterized by scanning electron microscopy (SEM), Fourier transformation infrared (FTIR) spectroscopy and thermo gravimetric analysis TGA-DTG analysis. The compositional and structural studies indicate the formation of polyurethane linkages. Also the thermal stability is indicated by the TGA analysis. The SEM image provides the morphological studies for the polyurethane samples.
Investigations of the influence of hexagonal boron nitride particulates on mechanical & tribological properties of PA66
Authors: Mistry M , Randhawa K S
Published: December 2020

The present research investigates the influence of hexagonal boron nitride (h-BN) particulates on PA66 composite’s mechanical and tribological properties. The compounding of 5wt% h-BN and PA66 matrix was done with the help of twin-screw extruder. Specimens of pure PA66 and PA66/h-BN composites were prepared by the injection moulding process. Mechanical and tribological properties i.e. tensile strength, modulus of elasticity, Rockwell hardness, friction coefficient and wear rates were measured in this research to quantify the different properties of materials. Results shows that the modulus of elasticity and Rockwell hardness of composites were improved while the tensile strength was found decreased in negligible amount compare to pure PA66. The h-BN fillers were found to be effective in reducing wear and friction of PA66/h-BN composite in tribological testing.
Shape memory alloy properties, modelling aspects and potential applications - a review
Authors: Vasudha N , Uma Rao K
Published: December 2020

Shape Memory Alloys (SMAs) are an interesting class of materials for researchers over the past few decades. With the advancement in material science and technology, more importance is given to active materials whose properties can be tailored according to the needs, enabling the development of engineered materials that are strong, lighter in weight, and occupy less volume. The shape memory alloys stand apart from the other metals in terms of the recoverable strain it can undergo upon excitation by a thermal stimulus. Due to this unique nature the SMAs possess dual functionality, wherein it poses both as a sensor as well as an actuator, and hence finds its applications in diverse fields. The current paper will give a brief introduction to the SMA and its key effects, review and discuss the different types of SMAs, their material characteristics, behavior, advantages, modeling aspects that will aid in the practical implementation of the SMAs and potential applications.
Design and analysis of a passive ankle foot orthosis by using transient structural method
Authors: Kubasad Prashanth R , Gawande Vedant A , Todeti Somasekhara Rao , Kamat Yogeesh D , Vamshi Nemalikonda
Published: December 2020

Foot drop is a condition where individuals are unable to lift the foot through the ankle. It results in slap foot after heel contact and toe drag during the swing phase. Ankle Foot Orthosis (AFO) is a mechanical device that supports both the ankle and foot of the individual and guides the movements of the foot to prevent slap foot and toe drag. There are two types of AFOs:Passive AFO and Active AFO. In this work, design and static analysis of a passive AFO to fit a human foot is presented. The static analysis was carried out for AFO made of two different materials (Polypropylene and High-Density Polyethylene (HDPE)) with two different thicknesses (3mm and 4mm). Based on the results obtained from the static analysis, the design of AFO was optimized for shape and thickness.Further dynamic analysis was carried out on the optimized AFO to know its behaviour in walking condition. The results obtained from the static and dynamic analyses showed that the polypropylene AFO was better compared to that of HDPE AFO by generating less stress, deformation, and factor of safety. The proposed AFO can be fabricated and tested for real-time walking conditions.
Virtual design analysis of the sleeping structure
Authors: Kulkarni Narendra B , Sansgiri Sanjiv M
Published: December 2020

The sleeping structures are the structures which are utilized for sleep or rest purpose. The utilization of them in day-in day-out activities is common in present era. Designing of any structure, requires examining its behaviour for the applied load and boundary conditions. Designing of such sleeping structures have caught attention of many inventors from decades. This research paper focuses on brief description about the linear analysis of the sleeping structure i.e. Bed designed by authors. The new designs of sleeping structure designed by inventors have gained most attention in the development of sleeping structures. The authors design of the structure is modelled in Computer Aided Design software PTC Creo and analysed in analysis software Altair’s Hyperworks. In this paper the sleeping structure is formulated as 2D beam with three support, two supports at both end and one at middle. The aim of this paper is to analyse the behaviour of structure for maximum stress and deflection for different load stages.
Review and experimental study on performance improvement of split air conditioner by reducing inlet air temperature to the ODU
Authors: Dwivedi S , Shah B A
Published: December 2020

Split Air Conditioners (ACs) are more commonly use now a days in residential and commercial buildings for achieving thermal comfort in all seasons. Split ACs works on well-known VCR (Vapour Compression Refrigeration) cycle. Split ACs used more in summer season and due to high outside temperature condenser pressure in a VCR cycle and ultimately result in to high electricity consumption. One of the way to reduce energy consumption of Split ACs and increase cooling capacity is reduce air temperature entering to the condenser in ODU using evaporative cooling principle. In this paper detailed review have been carried out for the improvement of split air conditioner performance and experimental study conducted on Split AC (0.8 TR cooling capacity) with and without evaporative cooling pad at ODU. Evaporative cooling pad material and thickness have been varied to analyse their effects on cooling capacity and coefficient of performance (COP) of Split AC. Out of the PVC, Grass and Cellulose cooling pad of same thickness 150 mm, cellulose cooling pad at ODU of Split AC results about 2 bar reduction in condenser pressure and 1.5 KWH energy saving for 10 hours of operation in a day. Split AC with 100 mm thick cooling pad of cellulose material at ODU results in to approximately 16% increase in overall COP, 10.8 % increase in cooling capacity and 4.6 % reduction in power consumption and at 32°C DBT and about 35% RH outdoor weather condition.
Design of Antilock Braking System Based on Wheel Slip Estimation
Authors: Dankan Gowda V , Ramesha M , Sridhara S B , Naveena Pai G , Patil Sachin Kumar
Published: December 2020

The goal in this research is to develop a brand new ABS set of rules the use of doubtlessly available statistics approximately wheel forces. A novel ABS set of rules that uses both force and wheel slip measurements for manipulate is designed. In this study, a new integrated Nonlinear tracking Control (NTC) is evolved that includes the dynamic evaluation of hydraulic braking systems. A longitudinal dynamic behaviour of vehicle model under straight manoeuvre is simulated, which includes the angular wheel speed, vehicle velocity, wheel slip variation, brake pressure modulation and stopping distance. Mathematical modelling of Vehicle Braking System has been carried out in simulink, which employs a car pitch optimization using nonlinear control, when vehicle undergoes a surprising acceleration/deceleration and for the duration of panic braking scenario.
Spray dried nano oxide ceramics for free flowing plasma spray coating powders and battery material processing
Authors: Bhattacharjee Sushmit , Srivastava Yashdeep , Reghu VR , Ramaswamy Parvati
Published: December 2020

Advanced materials are widely used in electronics, aerospace and automobile industry devices and also in substances synthesized for food, medical and pharmaceutical industries. The quality of the base material powder has high influence on the resulting material body (the product) which goes into the manufacture of the device. To name a few (a) flowable ceramic powders from agglomerated nano ceramic powders for plasma spray coatings with the right sprayable powder characteristics (b) advanced graphene encapsulated nano ceramic oxide powders with uniform conductive coating layers as promising electrodes in Li-Ion batteries, (c) advanced bio-ceramic oxides such as hydroxy-apatite ceramic materials with right amounts of moisture, density and composition consistency as bone and dental implants in bio-ceramics research are examples. Among the many processing methods to achieve the base powders from nano ceramic raw materials the most capable and efficient is ‘Spray Drying’ which results in powders with high purity with well-defined properties. Complex composite by spray drying is achieved where the ‘matrix host’ material is encapsulated by the ‘guest layer’ with special properties. This paper illustrates results pertaining to experimentation via spray drying and microscopic investigation by using SEM associated with EDS on (a) Yttria stabilized zirconia plasma sprayable powders for Thermal Barrier Coatings application and (b) nano yttria stabilized zirconia incorporated into microns sized alumina powders for enhanced densification, to understand the significant role of process parameters on uniformity and consistency of the spray dried products. Information based on review on spray dried Li-ion battery materials is also included.
Esterification glycerol (by product in biodiesel production) with oleic acid using mordenite natural zeolite as catalyst: study of reaction temperature and catalyst loading effect
Authors: Nindya C C S , Anggara D R , Nuryoto  , Teguh K
Published: December 2020

In the heterogeneous system, reaction temperature and catalyst loading are very affected to the fluid diffusivities and molecular interaction in the active sites of catalyst. Theoritically, increasing both of them ensued to increases the chemical reaction rate. The aim of this research was to know how the effect of reaction temperature and catalyst loading to reaction rate in esterification of oleic acid with glycerol, based on oleic acid conversion result. The experiments were Carried out in a batch reactor by the reaction temperature from 160 to 200°C, catalyst loading of 0.5 to 2 wt% of solution, the reactants glycerol ratio of 3 mole / mole of oleic acid, reaction time of 80 minutes, agitation speed of 600 rpm, and mordernite natural zeolite as a catalyst. Observation result Showed that increasing the reaction temperature and catalyst loading were Accompanying by increases of oleic acid conversion. The highest conversion to reach at reaction temperature of 200°C and a catalyst loading of 2 wt% that was 75.09%.
Metallurgical performance of column and mechanical flotation as a rougher circuit in sphalerite ore flotation with %solid and frother dose variation
Authors: Oediyani S , Muttaqin A , Haryono D , Suwandana R F
Published: December 2020

Column flotation is commonly used in cleaner circuits at the ore beneficiacy industry. However, this research wants to apply the column to the rougher circuit as an alternative to the mechanical flotation due to its energy efficiency which is 80% more efficient. This research was conducted using column and mechanical flotation cells to observe their metallurgical performance as a rougher circuit. The feed is sphalerite ore at size -140+230# with variables of % solid 7.5;10; 12.5; 15 and doses of frother 20;30;40; and 50ppm. Reagents used include OrePrep, Potassium Amyl Xanthate 500g/ton, copper sulfate 500g/ton, and soda ash 500g/ton. Flotation process is carried out 5 minutes for conditioning and 10 minutes for aeration. The results obtained the recovery value and grade. The results from the experiment, it can be concluded that the recovery obtained by mechanical is superior, and for column flotation grade is superior. In the variation of solid percent and frother dose, recovery increases to the maximum point and then decreases because no signifant effect after maximum point. The recommended variables for mechanical flotation are 12.5 solid% and 50ppm frother dose, because the recovery worth 75.462%. For column flotation, 15% and 40ppm, obtain the highest recovery 53.439%.
Monitoring and controlling electricity consumption using Wemos D1 Mini and smartphone
Authors: Suryono Wiwid , Setiyo Prabowo Achmad , Suhanto  , Mu’ti Sazali Abdul
Published: December 2020

The purpose of this study is utilizing the system that can monitor and control electricity consumption using a smartphone remotely. Finding in this study related monitoring and controlling electricity consumption using wemos D1 Mini and blynk app on a smartphone is quite effective. The electricity consumption information is displayed on LCD of wemos D1 mini and blynk app on a smartphone in the form of voltage, ampere, watt, and frequency. This device has two control function namely local mode and remote mode. Using local mode will generate output load turned on by switch and using remote mode will generate output load activated via blynk app on a smartphone.
Development of leaf spring design in large vehicles made from material type 65 si7 using static analysis with reverse engineering
Authors: Nazaruddin N , Zainuri F , Prasetya S , Siregar R , Heryana G , Adhitya M , Sumarsono DA
Published: December 2020

University of Indonesia Electric Bus was first developed using Hino R260 chassis. For further development, especially to fill out local content, it must be carried out engineering of its components. One of which will be discussed in this paper is the spring component. Reverse Engineering method is used to redesign in such a way. Measurement of the existing leaf springs in the chassis is done. The dimensions and number of leaf springs for the front and rear wheels of the chassis are produced. With CAD software and finite element analysis, a static analysis is performed on each of these springs. Front axle leaf spring arrangement consists of 8 spring sheets with dimensions of width 80 mm and thickness of 10 mm with stratified length. Rear axle leaf spring arrangement consists of 5 spring springs with dimensions of 90 mm width and 12 mm thickness with evenly distributed length. The theoretical stress on the front leaf springs is 512.74 MPa and finite element analysis is 531.5 MPa. The theoretical stress behind the leaf spring which occurs is 721.67 MPa and elemental analysis up to 728.4 MPa. The material for both of these springs is chosen is 65 si7 or SUP9.
Camshaft modification on gasoline single cylinder engine to increase engine performance
Authors: Sudrajad Agung , Yusuf Yusvardi , Prasetyo Irwan
Published: December 2020

Motorcycle is the main transportation in urban and rural areas nowadays. Many users have not satisfied with performance of standard manufactured. The objective of this research is to improve motorcycle performance by modifying the camshaft duration. The research was conducted at Combustion Laboratory of Department of Mechanical Engineering Faculty of Engineering. The standard of camshaft duration is intake valve 221° LSA, 96.75° and exhaust valve 202° LSA 84°. The first modification camshaft is intake valve 235° LSA 100.5° and exhaust valve 235° LSA 102.5°. Second modification camshaft is intake valve 260° LSA 104° and exhaust valve 260° LSA 107°. The results of experiment show the good engine performance was in the second modification. Increased of torque are 19.182% and 22.902% for the first and second modification respectively. Moreover, increased of power are 7.378% and 13.45% for the first and second modification respectively.
Characteristics of aluminium AC4B reinforced with nano -SiC composites through stir casting methods
Authors: Fitri T N , Narottama W , Zulfia A
Published: December 2020

Aluminium with a composition of 7-10% Silicon (Si), 2-4% Copper (Cu) is a matrix used by adding Nano SiC reinforcement particles with variations of 0.25; 0.3; 0.4%Vf with the purpose of making bullet-proof materials that have high toughness, impact resistance, and good strength. In this study, fabricated composites used a stir casting process to produce superior mechanical properties which was caused by the bond between an effective matrix and reinforcement particles. Besides, the addition of Nano SiC reinforcement particles, it was also followed by adding 5%wt Magnesium (Mg) as a wetting agent, 0.04%wt Strontium (Sr) as modifier agent, and 0.15%wt Al-5Ti-1B as a grain refining agent. Fabricated composite specimens will be carried out several tests to determine mechanical properties such as density, porosity, hardness, tensile strength, impact resistance, and ballistic test. The result of the test will be compared to the results of that without the addition of reinforcement particles. Then, using the Optical Microscope (OM), Scanning Electron Microscope (SEM), Dispersive X-Ray Spectroscopy (EDX), and X-Ray Diffraction (XRD) to analyse the dispersion of reinforcement particles in the selected alloy matrix.
Selection of supplier for the evaluation of procurement of special chemical using entropy method and topsis in xyz company
Authors: Wijaya E R , Rudianto
Published: December 2020

In the process of procuring special materials, the company has more than one supplier for each item of goods, at XYZ companies selecting suppliers through process evaluation. In the evaluation process the supplier is chosen only based on the lowest price offered by the supplier, these criteria have not been able to ensure the selected supplier can meet other criteria such as quality, transportation system and so on. This study aims to determine whether the criteria that have the highest weight value in the selection of suppliers and to find out the best supplier in the purchase of special materials XYZ companies. In this study, the Entropy and TOPSIS methods are used to analyse the data.. Entropy method is used to calculate the weight of each criterion and alternatives, while the TOPSIS method is used to rank suppliers. The results showed that the criterion that had the highest weighting value in the selection of special material suppliers in the special material purchasing section of XYZ company was the criterion C3 and C12 with positive ideal solution value 0,0380 and 0,0389. Whereas the best supplier for PT XYZ’s special material purchasing department is supplier E with a preference value of 0.5517.
The manufacturing technology optimisation model: the crucial contribution of industrial mass-training in improving company performance
Authors: Sukarma L. , Hendra Franka , Effendi Riki , Mohamad E.
Published: December 2020

Fierce global competition, volatile changing market and the spread of advanced manufacturing technology have forced significant changes in the competitive arena of manufacturing industries. This manuscript presents the Manufacturing Technology Optimisation Model, which discusses the crucial role of industrial mass training in improving manufacturing company performance. This model provides insights toward the proper allocation of resources which will bring about optimum condition of improved company performance. Four lessons can be learnt from the model: (a) companies should focus first on improving their capability in effectiveness - doing the right things - before pursuing efficiency and adaptability; (b) the attainment of effectiveness can be accelerated by providing employees with on-the-job mass training on certain practices; (c) companies can continue to pursue the efficiency after they have excellent capability in effectiveness; (d) the pursuit of adaptability may simultaneously advance with that of efficiency, aimed at more responsive to customer requirements. A subsequent paper will demonstrate that selection of appropriate ‘people-based’ practices may accelerate improved company performance.
Fiscal incentive policy for coal downstreaming in Indonesia
Authors: Ragimun  , Rosjadi Imran
Published: December 2020

This study aims to describe the coal downstreaming program which is expected to increase the added value of coal in Indonesia. Increasing the added value of coal such as the gasification project has a strategic role to increase state revenues and foreign exchange and is expected to have implications for increasing development in the region and nationally. The research method used is a quantitative and qualitative approach. The quantitative approach is used the accounting approach and benefit cost analysis (BCA), while the qualitative approach is used in the study of literature and focus group discussions. From the results of the discussions, the Government can provide coal gasification fiscal incentives to pioneering companies with the consideration that this downstreaming program will be able to spur state revenue as well as regional and national economic growth. Besides this downstreaming activities will be able to increase similar activities in Indonesia.
Identify product families using cluster analysis: case study in Passenger Car Radial (PCR) tire product
Authors: Nugrahita Rere , Surjandari Isti
Published: December 2020

Manufacturing companies, such as tire manufactures are facing great challenges to cope with increased product variety which induced by customer demand. This variety lead to higher internal complexity in term of design and production. Thus, variety has to be well-managed in order to guarantee the positive outcome for company. One of the solution is to have a well-structured product family. In this research, products data are partitioned into clusters by applying cluster analysis for mixed-type data based on their general characteristic and component specification. Variants within cluster have similarities in term of characteristics and main product component used in production. By applying k-prototypes algorithm to handle these mixed type data, the data set is clustered and interpreted into eight different clusters using selected variables.
Product recommender system using neural collaborative filtering for marketplace in indonesia
Authors: Faizin Arief , Surjandari Isti
Published: December 2020

Marketplace has the potential growth in Indonesia indicated by the continued increase in the number of customers. However, the marketplace has some limitations to deliver personalized purchasing experience. Recommender system can support marketplace to overcome that limitations so that customer can find items or services based on their preferences. This study propose to develop product recommender system based on Neural Collaborative Filtering (NCF) algorithm. The product recommender system to be built is using implicit feedback data in the form of customer purchase data. Implicit feedback is reliable data for building recommendation system. The results have shown that NCF achieve the best performance and outperforms over the other collaborative filtering methods.
Website library information system design using fast method
Authors: Gunawan A , Wahyuni N , Setiawan H , Katili PB , Azla R
Published: December 2020

This research was conducted at the Department of Industrial Engineering as part of the department at Sultan Ageng Tirtayasa University which has applied information technology to support every academic activity, information media, and services. Likewise the library which is part of the academic facilities in industrial engineering matters. However, in the current condition the library does not have an information system as a form of service improvement and information technology utilization. In service activities and the availability of information in the library it was found that industrial engineering students have not provided information system support, specifically regarding search reference books, and research. A general search for references for this book is handled by the industrial engineering library. Based on this problem, therefore an information system based website will be designed using a CMS (Content Management System) because it can meet the management system, management information system, and present information to users. The information system in this study was designed using the FAST (Framework for Application of System Technique) method in which there is an analysis using PIECES (Performance, Information, Economic, Control, Efficiency and Service) therein. This method provides a model for analyzing and defining user needs, choosing solutions and making an organized system for designing information systems.
A simulation study of radiant chilled ceiling with dedicated outdoor air system for office buildings in Thailand
Authors: Aryal Ashmin , Chaiwiwatworakul Pipat , Chirarattananon Surapong
Published: December 2020

Radiant chilled ceiling (RCC) integrated with dedicated outdoor air system (DOAS) has been considered as a system offering building occupants a good thermal comfort with energy efficiency. This paper compares three different configurations of RCC and DOAS system in terms of cooling load, room condition and energy consumption. The results from TRNSYS simulation presented that all the configurations could maintain the indoor condition with the Predictive Mean Vote (PMV) value ±0.5 over the office hours 6:00-18:00. The mean radiant temperature of the room was found below the room air temperature which resulted from the low RCC surface temperature of around 19°C. No condensation occurred on the panel during the system operation. The study showed that the RCC with DOAS comprising of cooling coil (CC), round around coil (RC) and enthalpy wheel (EW) is the most energy saving configuration.
Corrosion resistance study of UNS A96110 aluminum alloy in chloride-sulphate solution
Authors: Loto Roland T.
Published: December 2020

Electrochemical analysis of the corrosion resistance of UNS A96110 aluminum alloy (UN6110) in neutral chloride media at 0.5%, 1%, 1.5%, 2%, 2.5%, 3% and 3.5% NaCl concentration, and 3.5% NaCl/sulphuric acid solution at concentrations of 0.00625 M and 0.1 M by potentiodynamic polarization method. UN6110 exhibited lower corrosion in the acid chloride solution compared to the results obtained from the neutral chloride media. The lowest corrosion rate (0.097 mm/y) was obtained from the neutral chloride solution at 0.5% NaCl corresponding to corrosion current density of 8.78 x 10-6 A/cm2 and polarization resistance of 2927 Ω while the highest value 0.344 mm/y was obtained at 3.5% NaCl concentration. Polarization plot showed significant variation at the anodic portion of the polarization plots with visible potential transients on the passivation portion of the plot. The aluminium alloy exhibited passivation reaction mechanisms due to formation and breakdown of the inert protective oxide. Variation of the cathodic polarization plots shows activation controlled reduction reactions. In sulphate-chloride solution, corrosion rate UN6110 significantly increased to 15.855 mm/y at 0.00625 M and 20.017 mm/y 0.1 M. Optical images obtained from the neutral chloride solution showed the presence of large micro corrosion pits and grooves due to the electrochemical action of chlorides. This differs from the images obtain from the acid chloride solution which showed general surface deterioration couple with well-defined micro and macro corrosion pits.
Fabrication of non-woven hybrid natural fiber/poly(lactic acid) composite via prepreg lamination
Authors: Khieomuang J , Thongpin C
Published: December 2020

Hybrid natural fiber-reinforced polylactic acid (PLA) composites were prepared using a prepreg lamination. Two types of the long continuous natural fibers, i.e. sisal fiber (SF) and pineapple leaf fiber (PALF) were used in this work. The SF and PALF were treated using alkalization (NaOH) and then silane coupling agent (APS) to improve the interfacial bonding between fiber and PLA. After the surface treatment, the chemical group on the surface of SF and PALF were analyzed by Fourier transform infrared (FTIR). The FTIR result confirmed that hemicellulose and lignin were removed and also silane was grafted on the fiber surface. The micrographs by scanning electron microscopy (SEM) of the fibers observed morphological change of the fiber surface. The surface treatment improved the thermal stability of fiber as detected by thermogravimetry analyzer (TGA). The tensile strength of single SF and PALF were increased after surface treatment by alkalization and silane, respectively. Moreover, the tensile strength increases as an increase in the fiber length. Thus, the hybrid natural fiber/PLA composites showed high tensile properties compared with SF/PLA, PALF/PLA composites and pure PLA.