bluuebunny/crossref_metadata_2025 huggingface dataset:
Convolutional neural network acoustic model for robust Indonesian speech recognition in noisy environment
Authors: Budiman M J , Lestari D P
Published: May 2020

Noise causes the decreasing accuracy of automatic speech recognition (ASR). Several techniques have been developed and proposed to overcome this problem. Using artificial neural network (ANN) as acoustic model is one of the techniques. Convolutional neural network (CNN) is a variant of ANN that has been used for acoustic modeling. Another approach is to do pre-processing to the speech signal or to the extracted acoustic feature from speech signal, such as cepstral mean and variance normalization (CMVN). On this work, CNN acoustic models were trained by using CMVN pre-processed acoustic feature to make a noise-robust speech recognition system. Two group of models were made, each to handle 2 kinds of noise (babble noise and street noise). Those acoustic models were tested with noisy speech at different SNR (signal-to-noise ratio) value. Testing results from CNN acoustic models were compared with the ones from Gaussian Mixture Model-Hidden Markov Model (GMM-HMM) acoustic models. Testing results showed the increasing accuracy scores of acoustic models when models were trained using more variation of training data. CNN acoustic models that were trained using FBANK feature have higher accuracy scores than GMM-HMM models that were built using the same feature.
The Identification System of Acne Type on Indonesian People’s Face Image
Authors: Darmawan Agus , Rositasari Annisa , Muhimmah Izzati
Published: May 2020

We report the results of the detection of types of acne on the human face that are identified directly by a specialist skin and genitals. The proposed algorithm has been tested on a standard image and gives very reasonable results, there are 5 types of acne identified, namely Blackhead Blackheads, Blackhead Blackheads, Papules, Pustules and Nodules. Work completed using PYTHON.
Recommending Tourism Destination using Collaborative Filtering
Authors: Apriliana Rahmatina Ari , Ahmad Hidayatullah Fathan , Hamzah Almed
Published: May 2020

Tourism is among the interesting area of research as more people traveling to various destinations worldwide. With the vast amount of places to visit, there is a problem for tourist to determine which place is most suitable for them in terms of their preferences. However, it can be solved by the means of technology. This paper propose the use of recommender techniques to help tourist in selecting the most preferable destinations. A web-based application was built as an interface with the tourist. The result shows that the system is functioning as it expected. Future directions are discussed.
Knowledge management system (KMS) framework for outcomes-based education sustainability
Authors: Galeon D H , Palaoag T D
Published: May 2020

Etched in official memoranda, the Philippine higher education institutions (HEIs) are in their transformational outcomes-based education (OBE) as a government-prescribed educational reform towards quality and sustainability. The educators in these HEIs have a positive attitude and knowledge towards OBE principles and implementation however they lack resources. The paper aims to understand the knowledge management (KM) practices of the Ifugao State University (IFSU) and design a KMS framework considering the most critical factors affecting its implementation, which shall serve as a reference to its development. Using a descriptive-analytical method, it shows that the institution has a strong KM culture but needs to advance their KM strategy and implement modern KM technologies. It also shows that the stakeholders are excellent in socializing and control activities but need improvement and support in networking, encountering, collaborating and coordinating activities. Thus, the proposed KMS framework was designed to build up their KM practices. It primarily informs the stakeholders on whose knowledge, what type of knowledge, how, and why they need to manage knowledge. Future research includes the development of a KMS prototype based on the framework and tests its applicability for the community of practice.
Analysis of the diagrams and main parameters of the existing structures of the articulated tracked vehicles
Authors: Belyakov V , Makarov V , Klubnichkin V , Klubnichkin E
Published: May 2020

The articles reviews structures of the existing all-terrain articulated tracked vehicles (ATV). It includes the existing classification of the ATVs by the type of pivot coupling mechanism (PCM). It analyses the vehicles produced by the principal manufacturers of ATV available on the Russian market. It offers statistical dependencies for the main relationships of the basic power, dimensional characteristics as well as ground pressure depending on the ATV gross weight. It presents a block diagram of the method of rational selection of the vehicle type, maneuverability control system, provision of the total required power, capacity, maximum travel speed.
Stationary simulation method of road conditions in the problem of interaction prediction of the wheel of the vehicle support surface
Authors: Volskaja N , Zhileykin M , Zakharov A
Published: May 2020

A method for estimating the deformation properties of the support surface of the operation proposed area of a four-wheel drive wheeled vehicle is presented. These properties influence the vehicle efficiency. The method is based on the use of physical characteristics of soils specified in the probabilistic form. The estimation of the vehicle movement efficiency is carried out on the average probabilistic speed on the reference route. Features of vehicle rectilinear and curvilinear movement are considered.
Selection of the combat vehicle individual wheel drive operation modes under required mobility criteria
Authors: Kotiev G , Padalkin B , Miroshnichenko A , Stadukhin A , Kositsyn B
Published: May 2020

With the development of the electric drive systems and vehicle on-board power sources the development of the combat vehicles with individually driven wheels is becoming a promising area. In the presented article, the authors illustrate an approach to selection of the requirements for power plants of such vehicles by an example of an 8x8 combat vehicle with full weight of 25 t. The approach is based on the use of the real-time driving simulator allowing the operator to drive the vehicle along typical routes and gather statistical data on the operation modes of the electric motors in the conditions close to the real operation conditions. The virtual driving for this purpose is performed along the routes which are generated from the known statistical data on the excitation inputs during the vehicle motion. The collected data can be used for the selection of the electric motor mechanical characteristics providing given mobility criteria of the vehicle and for the statement of the requirements for new electric motor specifications which would provide its most effective use on the vehicles being developed.
Mathematical Modeling of a Linear Motion on a Deformable Bearing Surface of a Saddle-Type Road Train with Active Semi-Trailer Element
Authors: Chudakov O , Gorelov V , Padalkin B
Published: May 2020

The paper introduces a mathematical modeling of linear motion on a deformable bearing surface (DBS) of a two-link road train consisting of four-axle truck with independent wheel drive and a three-axle semi-trailer. Predictive modeling based on application of pull-traction and energy efficiency obtained during the field research was used in the course of the model development to predict wheeled vehicle mover properties. Results of the theoretical research are given that relates to road train uphill motion with various wheel drives of the semi-trailer.
Using strain gages to assess the bearing properties of underlying surface with a robot crawler
Authors: Mashkov K , Pozdnyakov T
Published: May 2020

The advent of military robotic systems has raised requirements for control systems, especially independent motion control, in particular, lateral possibility and flotation when moving in partially defined or undefined environment and in the presence of external perturbations. This paper proposes approaches to determine bearing reactions under the dynamic interaction of RV running gear with the bearing surface. It demonstrates a set of gages built into the tracked running gear allowing to evaluate the underlying surface properties. It proposes a computer-aided engineering system based on the finite element method to identify the most efficient locations to install strain gages.
Improvement of the active safety of the vehicle for driving on the irregularities by the method of control of vertical reactions on wheels
Authors: Ryazantsev V , Balabin I , Balsam A
Published: May 2020

Countries with large territories have numerous roads of relatively nobody’s quality, characterized by the presence of large irregularities. There are improved roads, but they are badly damaged by inappropriate exploitation or by geophysical and climatic hazards. Such roads are characterized by unevenness, periodic or randomness. The speedy movement of medical transport, rescue vehicles and special services can be difficult because of the possible loss of vehicle stability, which leads to accidents. Often, the loss of stability in such situations is associated with the appearance of resonance vibrations of the vehicle’s wheels, which leads to a deterioration of the wheel to the road, reducing the transverse stability of the axle and thus allowing it to slide transversely. There are many active safety systems, such as ABS, directional stability system and others, which lose their effectiveness in these circumstances. This inconvenience can be avoided by applying the stabilization system for vertical reactions to the vehicle’s wheels (SVRDK).
Crashworthiness design of truck’s cabin using topological and parametric optimization
Authors: Goncharov R , Zuzov V
Published: May 2020

In the given work the basic problems of search of optimum parameters of a cabin of the truck based on parametrical and topological optimization for the purpose of maintenance of requirements on crashworthiness under the international rules and reception of its minimum mass were considered. The article presents the developed finite element models of the cabin and drummer in relation to the optimization tasks, allowing to obtain results with acceptable accuracy and minimum time of solution when using LS-OPT and LS-TaSC programs with LS-DYNA solver. Steel linings and a foam filler are used to reinforce the cabin. In order to solve the problem and more fully assess the impact of parameters, several options were considered to refine the cabin. Topological optimization was carried out in order to obtain a picture of the best distribution of filler on the frame of the cabin. Parametric optimization was carried out by selection of filler properties (aluminium foam) and thickness of structural elements of the cabin. As a result, the passive safety requirements were achieved with optimal mass distribution as a result of combined use of linings and filler. The cabin’s mass increase was 20%.
The Model of Artificial Neural Network and Nonparametric MARS Regression for Indonesian Composite Index
Authors: Devianto Dodi , Permathasari Putri , Yollanda Mutia , Wirahadi Ahmad Afridian
Published: May 2020

The Indonesian composite stock price index is an indicator of changes in stock prices as a guide for investors to invest in reducing risk. The regression model for Indonesian Composite Index (ICI) has the response variable as stock prices with fluctuation behavior and several financial predictor variables, the model tends to violate the assumptions of normality, homoscedasticity, autocorrelation and multicollinearity. This problem can be overcome by modeling the composite stock price index by using the Artificial Neural Network (ANN) and nonparametric regression of Multivariate Adaptive Regression Spline (MARS). In this study, the time series data from the composite stock price index starting from April 2003 to March 2018 with its predictor variables are crude-oil prices, interest rates, inflation, exchange rates, gold prices, Dow Jones price, and Nikkei 225 Index. The both methods give better goodness of fit, where the coefficient of determination ANN is 0.98925 and the MARS determination coefficient is 0.99427. While based on the Mean Absolute Percentage Error (MAPE) of ANN was obtained 6.16383 and the MAPE value of MARS is 4.51372. This means that the ANN method and nonparametric MARS regression method have good performance to forecast the value of the Indonesian composite stock price index in the future, but in this case of data the nonparametric MARS regression method shows the accuracy of the model is slightly better than ANN.
Expert system on core competency detection and student achievement based on Fuzzy TOPSIS method
Authors: Sutiah  , Supriyono  , Zuhriyah Indah Aminatuz , Arifin Zainul
Published: May 2020

The improvement of information technology is experiencing rapid development. The expert system experienced a rapid increase so that it is helpful to human needs in resolving existing problems. The following research has built intelligent systems based on the fuzzy TOPSIS method intending to help to detect core competencies and student achievements. Testing system on the expert system based on the Fuzzy TOPSIS method the conditions in the Ministry of Education Islamic Religion Faculty of Tarbiyah and Islamic State University Maulana Malik Ibrahim Malang. The results show quite a good result that can help in making process decisions. From testing showed that the fuzzy method of TOPSIS resulted in a pretty good level of accuracy in expert systems on core competency detection and student learning achievements.
Twin loop induction sensor for detection Partial discharge
Authors: Waldi Eka Putra , Lestari Asri Indah , Fernandez Rudy , Mulyadi Saifa , Darmawan  , Laksono Heru Dibyo , Andre H , Aulia  , Hazmi Ariadi , Murakami Yoshinobu , Hozumi Naohiro
Published: May 2020

Partial-discharge is a symptom of high voltage insulation aging, which is a small voltage pulse with high frequency and superposition with high voltage sources that have low frequencies. To find out the existence of this signal, it needs a reliable measurement technique to avoid misinterpretation. This paper presents a technique for measuring partial discharge with an induction method. The sensor used is circular twin loops. The first loop passes through a partial discharge signal, and the second induction receiver produces an induced voltage signal. Various sizes of loop diameters are designed with dimensions 3.2, 4.7, 8.9, and 11.4 cm to look for sensor sensitivity. The performance sensor is analyzed by reading the sensitivity test to the input given with 50-ohm oscilloscope impedance. From the measurement results, the higher the diameter of the sensor loop has good sensitivity.
Mobile Application Security Penetration Testing Based on OWASP
Authors: Alanda Aide , Satria Deni , Mooduto H.A , Kurniawan Bobby
Published: May 2020

Evolution of smartphones and smart devices affected one of the most used operating systems on smartphones and smart device is Android. Android growth with fast and affected the growth of applications used by that operating system. That application developed by many developers and can be downloadable on the play store. besides the benefits and features that operating systems are given and support from the application can affect security to users. The purpose of this research is to know vulnerability and technics that used to find a vulnerability in Android operating systems and Android applications. In addition, to give recommendations and prevention from the vulnerability. Technics and methods that used based on research from the OWASP Foundation consisting of 10 main vulnerability in Android application that is improper platform usage, insecure data storage, insecure communication, insecure authentication, insufficient cryptography, insecure authorization, client code quality, code tampering, reverse engineering, and extraneous functionality. The results from testing of five applications downloaded from Play Store. 4 application have vulnerability based on OWASP Mobile Top Ten documentation. The OWASP documentation can give an illustration of the vulnerability that most found in Android applications from the market.
Tuning with Ziegler Nichols Method for Design PID Controller At Rotate Speed DC Motor
Authors: Allu Nicolaus , Toding Apriana
Published: May 2020

DC motor is a type of motor that is widely used in industry, electronics and supporting components for some electronic equipment or instrumentation. But now the PID controller is still widely used in various industrial sectors, this is due to its toughness to overcome various problems that exist in the industry. But there is one drawback that is the tuning method, the tuning process must be done by trial and error. More tuning procedures done manually by trial and error method that the result is not necessarily true. To overcome these problems required an alternative approach that can achieve a relatively better value and faster to perform the tuning process. In this case the alternative method used is tuning with Ziegler Nichols. Based on the simulation performed with the controlled torch, the value of the disturbance with the controller Kp = 3,6, Ki = 2,857 and Kd = 1,134 happened to the motor rotation at the lowest interference occurred at 1818 RPM while the highest rotation disturbance reached 2177 RPM from the nominal rotation speed of 2000 RPM for 80 seconds and suffered a friction coefficient of about 20 seconds.
Pricing and Contract Design for Software Products in the Presence of Requirements Change
Authors: Pambudi Pandu Dwi Luhur , Wu Cheng-Han , Mahendrawathi ER
Published: May 2020

The presence of software requirements change (RC) during project development is a critical challenge for the developer to offer software contract designs. Because under the presence of RC, the decisions toward the contract offer will impact to project’s price spent by the developer. Managers of software companies must decide what contract designs to offer to clients in the development of software. Abstracting from an example drawn from the software industry, we exhibit three designs of software contracts incorporating fixed price (FP) and time-and-materials (T&M) policies. Specifically, a software company offers a fixed-price and agree to RC with adjustment cost (SW contract), or initially provides a fixed price and then charges an additional fee based on the time-and-material in response to RC (MP contract). We examine the strategic choices of two contract designs in a two-stage game. We carry out a full analysis of distinct settings of monopoly model. We characterize the conditions under which the contracts can be the best decision for developers. As the result, we found that the MP contract performed better when accommodating the presence of RC instead of the SW contract.
The Performance between Two Long-span Roof Trusses of Cold Formed Steel with Back to Back Channel Section
Authors: Fitrah Ridho Aidil , Nofriyandi R
Published: May 2020

Cold formed steel (CFS) is mostly used for short span structures in Indonesia because its advantages in cost and time efficiency. However, there is still limited number of long-span construction using cold formed steel because its buckling issue. Throughout the time, there are many researches that revealed the buckling issues can be prevented; one of them is combining their section. Then, CFS structure should give full structural performance. This research aims to analyze the performance of long-span roof truss, 24 m, using CFS back to back channel section. Two types of roof trusses, model 1 and model 2, are compared to get better configuration for long-span roof truss. Analysis is conducted by 2D model and analytically calculated based on SNI 7971:2013. The results are the maximum axial tensile force and axial compressive force, and also deflection. They will be compared to CFS back to back channel section capacity. This analysis obtained the stress ratio and deflection of both configurations. Based on analysis results, CFS back to back channel section safely withstands resisting axial forces by giving compressive ratio number around 0,54-0,72. Then, model 2 has given better structural performance, stress ratio and deflection, than model 1.
The Effect of Aging Treatment on Mechanical Properties And Microstructures of Ti-12Cr In Ortodontic Applications
Authors: Anderson Sir , Annisa  , Affi Jon , Yetri Yuli , Gunawarman
Published: May 2020

Many adults experience tooth loss due to accidents and lack of care. This causes various problems, one of which is a problem in chewing food. One solution that can be used is the use of dental implants. Dental implants that are currently made of titanium Ti-6Al-4V at a very expensive price. One of the newest types of titanium alloy material that can be used with relatively cheap prices is Ti-12Cr. As a new material, the effect of heat treatment processes on mechanical properties has not been investigated in more detail. So that research is needed on the effect of heat treatment with the aging treatment process on the mechanical properties and microstructure of the Ti-12Cr material as a substitute for cheaper titanium implants. In this research, a solution treatment (ST) heat treatment was carried out at 885oC and an aging treatment (AT) at 540°C. Aging treatment is carried out with variations in holding time of 30 ks and 60 ks. Then the microstructure inspection and mechanical properties testing are carried out through hardness and tensile tests. With the aging treatment of the microstructure of the material, Ti-12Cr experienced grain refinement and the hardness obtained was higher than that of Ti-6Al-4V. The hardness values of Ti-12Cr ST, Ti-12Cr AT 30 ks, Ti-12Cr AT 60 ks and Ti-6Al-4V are 457 VHN, 605 VHN, 772 VHN, and 349 VHN. However, the tensile strength of Ti-12Cr is lower than the tensile strength value of Ti-6Al-4V.
Estimation of Shear Wave Velocity of Darul Imarah District, Aceh Besar, Indonesia by Using 1D HVSR Inversion
Authors: Yusran Y , Khalqillah Aulia , Muksin Umar , Syukri Muhammad , Rizal Syamsul , Ismail Nazli
Published: May 2020

A total of 19 locations of Horizontal to Vertical Spectral Ratio (HVSR) measurements was conducted in Darul Imarah District, Aceh Besar, Indonesia. The objective of the research is to investigate the shear wave velocity (V
s) structure. This survey is important to analyze a structural characteristic through a V
s, considering the measurement points intersect to Aceh Segment Fault. One of the methods to obtain Vs
is 1D HVSR inversion. In this paper, we analyzed only four of 19 measurement points of HVSR data to estimate Vs
, they are AB03, AB08, AB09 and AB19 points. The inversion results show that the four points have four layers with different Vs
. The average of Vs
30 of AB03, AB08, AB09 and AB19 were calculated, they are 150.90 m/s, 197.16 m/s, 150.45 m/s and 316.80 m/s, respectively. The AB09 has the lowest average of Vs
30 (highest amplification) than the other points and has soft soil composition. Furthermore, based on the average of Vs
30 and amplification, the subsurface of AB03, AB08 and AB19 may have combination soft soil and stiff soil in 30 m depth. The complete analysis of average of Vs
30 structure will be conducted at all sites including a 3D velocity structure will be derived from the interpolation of 1D velocity.
Study of Land Erosion and Bed Change Simulation of Danau Diatas and Danau Dibawah
Authors: Sadtim  , Dalrino  , Hartati  , Hanwar Suhendrik , Aguskamar
Published: May 2020

Numerical bed change study of Danau Diatas and Danau Dibawah was conducted. Hydrodynamic and sedimentation simulations are carried out using monthly discharge input limit conditions obtained from the calculation using the FJ Mock method. The RMA2 numerical model is used to obtain current patterns that are calibrated against the measurement results. Estimated land erosion is calculated using the USLE equation. Sediment discharge obtained from the USLE equation is used as an input of sediment sources to obtain sedimentation patterns using the SED2D module. The results of the modeling of the current pattern get the current velocity ranging from 0 - 0.05 m / s for Danau Diatas and between 0 - 0.04 m / s for Danau Dibawah. The bottom profile change due to the distribution of sedimentation was found to range between 0.12 ∼ 0.21 m in one year simulation with a radius of 0,53 and 1,72 km. This study is a preliminary study to get an idea of the potential for sedimentation. The validity of the results is recommended to use bathymetry measurements to see the bed changes that occur with the time of measurement. The initial description obtained has shown the need for efforts to regulate land use and commensurate with lakes in anticipation of silting of lake waters due to erosion.
Analysis of textile dye production scheduling using FCFS, CDS and Heuristic Pour methods
Authors: Hidayah N Y , Syafrizal M , Darmawan M
Published: May 2020

PT. X is a company engaged in the chemical industry that produces various types of textile dyes for several garment companies in Indonesia and abroad. The manufacture of various dye textiles has a different processing time because it is influenced by the quality and parameters of each product. The production scheduling system used by the company is First Come First Served (FCFS). Companies often experience delays in the timely delivery of orders due to the production scheduling system that is used by the company was not optimal. This research was conducted to schedule a sequence of textile dye processing in PT. X by using the FCFS, Campbell Dudek Smith (CDS) and Heuristic Pour to get shorter makespan and minimize delivery delays. The results of research at PT.X showed that the scheduling method which had the fastest makespan was the Heuristic Pour scheduling method with a total makespan of 562.4 hours (23 days) and could save time by 47.96 hours or 7.86% compared to the FCFS method.
Integration of conjoint analysis and QFD for new product development in manufacturing small and medium enterprises (case study: a food company)
Authors: Kosasih Wilson , Laricha Salomon Lithrone , Darius Halim Alfred
Published: May 2020

Basically, small and medium enterprises (SMEs) in Indonesia are weak in innovating product development in accordance with customer’s needs, making it difficult for SMEs to penetrate the market. This paper discusses the application of integration between Conjoint Analysis and QFD in the development of a new product from SME. The research was conducted at a medium-sized company, which produces a variety of “dimsum” frozen food products. Finally, the integration of the two provides a double benefit in the research and development stage of the manufacturing SME so that a new product that is developed can really be realized. The final design results obtained two new product segments according to its target market, namely for the economic and premium segments.
Safety stock analysis of ship fuel in shipping company (Case study: white oil ship PT. Pertamina (Persero))
Authors: Fatma Septiana Nuzul , Sukarno Iwan
Published: May 2020

Currently, fuel supply of PT. PERTAMINA (PERSERO) SHIPPING for each trip with a predictive safety stock to supply as much as 40% of the total fuel provided. The fuel that is stored for too long will also affect the sediment, thereby reducing the performance of the ship’s engine in the long run. Optimization was conducted by using the safety stock formula which influenced by the uncertainty of demand and the uncertainty lead time (sailing time) of the ship. Calculations are based on demand from three distance routes that have the highest frequency assignment. Calculations are performed by comparing the safety stock in the four conditions, namely: (a) the condition of safety stock with combination of three routes (heterogeneous); (b) the condition of the safety stock by successively using the distance 286 NM; (c) 320 NM; and (d) 536 NM. The results obtained by calculating safety stock with the heterogeneous condition was 81.44%; homogeneous conditions within the 286 NM; 320 NM; 536 NM were 15.2%; 7.3%; and 29.2% of the total fuel supplied. Thus, the safety stock application is done by plotting trend charts to get an increase of 0.056% for each NM.
Productivity Analysis Stevedore a Descriptive Analysis Method with Integration, Importance Performance Analysis, Quality Function Deployment (Case Study: PT. Port Indonesia III (Persero) Branch Gresik)
Authors: Widodo E , Suprayitno H , Suparno  , Umaiyah
Published: May 2020

Gresik port is a port with a very strategic location in the region Gresik industrial area, productivity can be achieved with the implementation of a better way of working, organized, effective, efficient, creating something better. the productivity of loading and unloading the target of service to satisfaction of stakeholders, how to determine the factors that influence and by improving the productivity of loading and unloading at the port of Gresik. With descriptive analysis method to know the level of EF: BT is still yet to be achieved was based stevedoring productivity director general of sea transportation standards already achieved. Methods importance performance analysis is used to determine the perception of the services to be improved the speed in the process of loading and unloading, the availability of facilities and port equipment, fleet readiness ocean going ship expeditions, circumstances and facilities yard, competency officers loading and unloading, the speed of completing complain, system lighting port. Methods of quality function deployment used to determine priority in handling an increase in productivity of loading and unloading at the Port General Gresik.
Optimizing production layout and capacity via FlexSim– A case study of Y factory
Authors: Chen Tai-Jung , Lee Yu-Ching , Chiang Chin-Hsin
Published: May 2020

Production capacity maximization and cycle time reduction are considered two of the most important issues for general factories. The paper applies Systematic Layout Planning (SLP), process balance, and system simulation to a small condense units manufacturer to enhance its production capacity and reduce cycle time. The developed solution shortens the total traveling distance by 81.25% and reduces the original travel time by 61.76%. In addition, we calculate the number of machines needed by process balancing and decrease the original cycle time by 64%. It is found that the proposed approach improved both cycle time and travel distance, and free up considerable capacity for manufacturing of other condensing units product types.
Economic Feasibility Study of Onshore Exploration Oil Field Development using Gross Split Contract
Authors: Ariyon Muhammad , Setiawan Aldo , Reza Refiandi
Published: May 2020

The condition of the oil and gas world economy is not good and the cost recovery is too large and the results obtained are not comparable to those obtained by the contractor. Thus, the change in the new contract system with the addition of split rules for contractors considers in managing the oil and gas fields. To restore the situation and restore the spirit of the contractor to continue investing in Indonesia, the Indonesian government provides contractors with incentives and other alternatives to change the existing PSC Contract with the Gross Split PSC based on the Minister of Energy and Mineral Resources Regulation No. 52 of 2017. Field X is one of the onshore Exploration fields in the South Sumatra Basin. The field is a commercial field that has potential oil reserves to be managed. To conduct field X development, it is necessary to conduct an economic study of field X development using a Gross Split contract to determine the feasibility level. Based on calculations using the Gross Split Contract field development X has a contractor NPV value of $ M 192, 63, Government NPV = 415, 235 and Contractor IRR = 41.04%, Government Take = 72.3% and Contractor Take = 27.7%. Based on this, the Government and Contractors will benefit from using the Gross Split PSC Contract because it is economical to develop.
Quality improvement on Common Rail Type-1 Product using Six Sigma Method and Data Mining on Forging Line in PT. ABC
Authors: Fitriana Rina , Saragih Johnson , Defina Fauziyah Salma
Published: May 2020

PT. ABC is a manufacturing company engaged in the automotive sector that produces components of cars and motorcycles. This study aims to improve quality by using the six sigma method with the DMAIC stage (Determine, Measure, Analyze, Improve and Control) and analyze it using data mining techniques. At the definition stage 7 defects were identified Critical To Quality namely pockmarked, burry, dent, rust, lapping, marking and NG marking. The measure DPMO value is 28, 810 and the sigma value is 3, 399. In the analysis phase using data mining with the classification method with the decision tree algorithm, the company’s decision in decision-making status of Type 1 Common Rail products agreed on the 10 most interesting parameters. Based on FMEA, it is known as the main cause of the Common Rail Type 1, which is the crust on the dies, marking the product that appears and the trajectory of the heating machine to the forging machine that is too far. The improve phase is using Lifetime Card Dies, the marking is concave inward, reducing the running distance of the heating-forging machine and Controling Check Sheet Product. The DPMO value obtained after improvement is equal to 24095 and the sigma level is 3.476.
Analysis of the impacts of Motor Vehicle Exhaust Emissions at Pancasila University on health in order to create A Green Campus
Authors: Sholihin M Y M , Prasetyani R , Mukti B C
Published: May 2020

The current carbon monoxide (CO) emissions are the main component of diseases, such as cough, dizziness, nausea, and shortness of breath for those who inhale them. Pancasila University is one of the colleges in the city of Jakarta that cares about the poor quality of air in the city of Jakarta; therefore, Pancasila University wants to apply the concept of green campus as a form of concern for the environment. This research was conducted at Pancasila University to discover the relationship between air quality in the campus, especially carbon monoxide (CO) substance, and its impact on the health of the university’s academic community members. The methods used in this study are simple linear regression, HIRARC, and hierarchy of control. The results of this study show a relationship between CO substance variables and complaints about diseases suffered by members of the university’s academic community due to the substance, with an R count value of 0.9519. There are substantial risks that the students can experience, including student activities that cause nausea and outdoor employee activities that cause dizziness and nausea. These big risks can be prevented by issuing a decision letter to reduce air pollution at Pancasila University.
Designing A Reading Chair using Kansei Engineering Approach
Authors: Rahayu Mira , Ardian Ekananda Hilman , Mufidah Ilma
Published: May 2020

Supporting facilities such as reading chair are often used as a scene to read books. However, the existing reading chair has not satisfied the user. This Research uses Kansei Engineering which purpose to design a reading chair that fulfil user needs. Kansei Engineering was chosen in this research because it can translate customer’s impression, feeling, and demands on existing products or concepts to design concrete solutions and parameters into product design. This research is done on students in the Bandung area who use reading chair. Using a questionnaire as a tool to collect data that distributed online with google form to 347 respondents. Questionnaire data was processed using KMO statistical test and Barlett test, so from 23 Kansei word that had been obtained there was a reduction to 15 Kansei word would be used into designing reading chair in this research. The results of this research states, the implementation of Kansei Engineering could be done in the design of reading chairs, and there are innovations to meet user needs such as, armrest, headrest and footrest. Also USB port, lights, and book storage area. All of that can be used by users.
Analysis of Choice Shrimp Technology based on Business Process, Productivity, Financial and Risk
Authors: Tasha Aulia Akbar Wydzka , Chumaidiyah Endang , Rendra Meldi
Published: May 2020

The application of new technology in shrimp ponds, autofeeder, has many advantages, but carries a greater risk compared to conventional shrimp ponds, therefore a more structured analysis is needed to decide the best shrimp pond technology. The comparison is seen from business processes, productivity, financial and risk. The results of business process efficiency level with conventional worth 67.19% while for the autofeeder level worth 88.71%. The productivity results show FCR 1.34 (conventional) and 1.34 (autofeeder); SR 79% (conventional) and 90% (autofeeder); and productivity of 13 tons / ha (conventional) and 25 tons / ha (autofeeder). The financial shows an NPV of Rp 1, 515, 178.503 (conventional) and Rp 7, 721, 596, 229 (autofeeder); IRR 38.24% (conventional) and 51.23% (autofeeder); payback period 2.68 years (conventional) and 2.17 years (autofeeder); BCR 1, 696 (conventional) and 2, 065 (autofeeder). Furthermore, for the calculation of risk consisting of production risk and revenue risk with a total risk of 6% for conventional and 31% for autofeeder. In the results of technology selection with an assessment of the 15 criteria above, the results obtained 4 criteria are better for conventional technology and 11 criteria are better for autofeeder technology. So between the two technologies, the selected shrimp pond system is the Autofeeder technology.
Warehouse Layout Designing of Cable Manufacturing Company using Dedicated Storage and Simulation Promodel
Authors: Septiani W , Divia G A , Adisuwiryo S
Published: May 2020

PT. XYZ is a cable manufacturing company that has several types of cables produced. Goods produced are stored in finished goods warehouses with two types of packaging, namely haspel and roll. Laying of goods in open goods warehouses in the form of randomly arranged haspels is mixed between each type of haspel. The purpose of this study was to evaluate the layout of finished goods warehouses for haspel types so that they can be grouped and minimize displacement time. This study uses a simulation design that is implementing a real system using a ProModel simulation and provides improved layout evaluation with a dedicated storage method approach, i.e. goods or materials placed in a fixed location. The first step is to collect and identify the real system and then implement using a ProModel simulation resulting in a total displacement time of 140.27 hours. Improvements to the layout of the finished goods warehouse using a dedicated storage method to group haspels. From the calculation results, there are two scenarios, the first is the application of haspel grouping from the calculation of a dedicated method with displacement time of 139.21 hours and the second scenario adds material handling from the first scenario, the displacement time is 128.08 hours. The results of scenario two resulted in a decrease in displacement time of 8.69% by grouping the haspel and adding material handling.
EPR Approach for Better Waste Management System for Mobile Phone Design in Indonesia
Authors: Junianto A B , Sugandha D C
Published: May 2020

The influence of toxic electronic waste or electronic goods will occur if it is disposed of carelessly or managed in the wrong way. Open dumping and crude waste handling in landfill sites in Indonesia creating even more miserable situation (Damanhuri, 2010). Mobile phone or cell phone is considered as one of the fastest growing device in global society. More than 60% of global population have mobile phone, end even an individual may have more than one device. EPR could be taken as strategy in order to find better e-waste management of renewable and non-renewable resources specifically for Indonesia situation. EPR related action of WEEE in Indonesia is still uncertain especially for mobile phone product. It is observed that many used mobile phones are still disposed improperly by unauthorized party and may danger the people and environment. This study will observe how the mobile phone waste is handled by unorganized organization, how EPR is taken into account in mobile phone waste management system and what kind of solution that is based on EPR that could enhance environmentally save property of mobile phone design in the future, especially for Indonesia situation. It is important by considering Indonesian situation; the producers need to employ new design strategy not merely in order to meet regulation compliances but should extend the responsibility for better waste management friendly product design that is more suitable with Indonesia situation with minimum waste management infrastructure by involving End-of-Life Design Solution; better collection, separation, recyclability, reuse and ease of manufacture
Scheduling and Allocation of Airport Service Manpower by considering Time and Work Constraints using M-MAPTWTC Method: a case study
Authors: Moengin P , Darussalam F
Published: May 2020

Airport Service workforce scheduling and allocation is important because the handling of ground handling jobs is also increasing. The system and allocation of workforce scheduling in the company that is currently being carried out is based on trials only (trial and error), this causes frequent shortages or excess labor. This can happen because in scheduling and allocating workforce has not considered the time span between the preparation time and flight time, as well as the work team constraints. To overcome the weaknesses of the system of scheduling and allocation of labor previously in this thesis, scheduling and allocation of labor is done by considering the time span between preparation time and flight time. The method used is using the m-MAPTWTC method. The results of a case study in a company using the m-MAPTWTC method show that the number of jobs done in the period 04.00 - 12.00 WIB as many as 80 flights can be done by 20 teams whereas previously the same number of jobs required 24 teams. With the m-MAPTWTC method it is also obtained the team allocation and work order for each job by each team.
Investigating Supply Chain issues in the Food Processing Industry
Authors: Khan S Z , Ashfaq MA , Awan M U , URehman H , Kamal S A , Hoa N T X , Shafiq M
Published: May 2020

With the recent increase in the complexity of food industries, numerous issues including rapid changes in taste and demand for food supplies are on the rise, particularly in developing countries. Aim: This research study was aimed at investigating supply chain management issues in food processing industries and influence of these factors on business performances. Methods: Research data from respondents was collected using online social platforms and Statistical Package for Social Sciences (SPSS) was employed to analyses the data. Results: Research findings indicated that factors including human resource management, technology, facility issues, and customer relations negatively influence business performance. Conclusion: Findings also reflect that human resource management issues represent a significant driver for improving performance of the food industries. This research study offers insight regarding barriers and drivers influencing the operations of food processing industries and what measures should be taken accordingly.
Comparison Analysis of Tajuk’s Onion Production Efficiency (Allium Ascalonicum) in Rejoso Sub-District – Nganjuk
Authors: Ulansari D R , Pujawan I N
Published: May 2020

Nganjuk is one of production area for Tajuk’s onion. This research aimed to compare the results of technical and allocation efficiency from Tajuk’s onion production in rejoso sub district, whether there are any differences or not. In addition, it will be used by the researcher to determine the factors which cause inefficiency and find sorts of way to fix the problems. The method used in this study was DEA and would be continued by conducting comparative test. The results in this study showed that there was difference between technical effeciency and allocation effeciency of Tajuk’s onion production in Rejoso Sub-District on June-September, 2019, showed that W value on Mann Whitney test met 67, 94 percent, contained sig value 0, 000. The three main factors which caused technical inefficiency were pesticide, water flow, and the land area. Meanwhile, allocative inefficiency is caused by certain main factors; pesticide, seeds, land area, and working hour. The pesticide usage can be dealt by conducting studies and comparative study among farmers, remesured the land area of sewer and flowerpot along with plants gap; making new irrigation; using stored up seeds only before the harvest time, and allocating the numbers of labors that arranged by land capacity.
Assessment of Safety Culture Maturity Level in Production Area of a Steel Manufacturer
Authors: Sudiarno A , Sudarni A A C
Published: May 2020

Safety culture is widely known to have the ability to encapsulate all factors including perception, psychology, and attitude. This ability serves as an important role for organizations in occupational safety and health. Further, this ability is used as an effort to reduce the risk of accidents. One of the efforts made is to measure the level of maturity of the safety culture in the steel manufacturer production area by involving the variables of safety culture, namely commitment, leadership, responsibility, competence, engagement & involvement, information & communication, risk, and organizational learning. This study aims to measure the level of safety culture maturity in the activities production area of steel manufacturers. Data collection was carried out by distributing questionnaires with a purposive sample of 107 workers. Two expert judgments are involved as determinants of the safety culture variable weights using the AHP (Analytical Hierarchy Process) method. The results showed that the level of safety culture maturity in the production area of steel manufacturer was 3, 64, which falls in the proactive category. The priority for improvement of safety culture variables starts from the leadership to the information & communication.
Influence of moisture dependent physical properties of fluted pumpkin vital to development it’s processing equipments
Authors: Shiru J J , Gana I M
Published: May 2020

Knowledge of physical and mechanical properties of seeds is an important factor for designing agricultural machines and equipment. A fluted pumpkin is a very important vegetable crop as well known for its high nutritional, medicinal and economic values, but the data on its physical and mechanical properties is still lacking. The aim of this study is to determine the effect of moisture content on the physical (basic dimensions, porosity, bulk and true densities, coefficient of friction, repose angle and sphericity) and mechanical properties of fluted pumpkin seed. These properties were evaluated as a function of moisture content at 45, 50, 55 and 60%. The results revealed that length, width and thickness increased with increasing moisture content. Similarly, an average mass of the seed, volume, surface area, sphericity, angle of repose all increased with increasing moisture content. Bulk density decreased as the moisture content increases. The parameters obtained from this study could be used as a reference data for the design of fluted pumpkin seed handling and processing equipment.