bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of decision support system for blood analysis
Authors: Septiana Yosep , Kurniadi Dede , Mulyani Asri , Baswardono Wiyoga
Published: September 2018

Blood analysis is a medical check by identifying blood that gives an explanation of health and is one way to detect certain conditions. Blood type determination is one of the scopes in a blood analysis. This research aims to design a decision support system for blood analysis Solver-oriented for the determination of blood type with ABO system (blood type system A, B, AB, and O) and Rhesus based on Immunohematology Concept theory. The system development method used is Big-Bang Model, with an object-oriented design approach. The result of this research is a software that can be used by health laboratories to assist the process of determining the blood type. With the use of decision support systems information technology-based, the results of the analysis of blood group determination will be more accurate to minimize the occurrence of errors in the determination of blood type.
The implementation of web service based text preprocessing to measure Indonesian student thesis similarity level
Authors: Watequlis Syaifudin Yan , Saputra Pramana Yoga , Puspitasari Dwi
Published: September 2018

The plagiarism of scientific work, especially undergraduate thesis, mostly happened in the college. In this research we used text mining, a new method which can be used to do the checking procedure, to obtain specific pattern of the document. After obtaining the document pattern, we compare the pattern with another document pattern. If the level of pattern similarity is high, it can be suspected as plagiarism. This paper will explain the development of the text preprocessing, a part of text mining. We choosed Nazief and Adriani Algorithm as a text preprocessing algorithm for this research. This research will result a text preprocessing web service. The web service is expected to be used for further development of text mining.
Automation animal tracker using complex value neural network
Authors: Imah Elly Matul , Wintarti Atik , Sulaiman R. , Manuharawati Manuharawati
Published: September 2018

Animal tracker is an important phase in animal behavior analysis. It leads to understanding how, when, and why the animal use the environmental resources, how, where, and when they interact with each other, with other species, and with their environment. Understanding the animal behavior is providing the link to population distribution which is essential for predicting the human-caused environmental change and guidance for conservation strategies. Tracking and detecting the animal is time and cost consuming. Machine Learning can relieve this burden by detecting animal automatically. Complex-Valued Neural Network is a method of Machine Learning that is challenging and interesting to be explored. This study applied of Complex-Valued Neural Network (CVNN) for animal tracking, especially in detecting the animal species. The experiment results present that CVNN is robust to recognition the animal automatically.
Antidiabetic activity of musa acuminata colla fruit peel (MACFP) ethanol extract in glucose-induced diabetic rats
Authors: Genatrika Erza , Laksari Visda Nila Happy , Tjiptasurasa Tjiptasurasa
Published: September 2018

Diabetes mellitus is a metabolic disorder disease characterized by increased blood glucose levels due to impaired insulin secretion or increased insulin resistance. The study was performed to investigate the blood glucose lowering effect of Musa acuminata Colla fruit peel (MACFP) ethanol extract in experimentally induced diabetic rats. 25 rats were divided into five groups, i.e negative control group (0.5% NaCMC), positive control group (glibenclamide), and treatment group of MACFP ethanol extract with dose 250, 375, and 500 mg/kg body weight (mg/kg BW). The blood sample was taken from the lateral vein of the tail, and then blood glucose level was observed on 0, 30, 60, 90, and 120 minutes. The results provide information that MACFP ethanol extract with dose 250, 375, and 500 mg/kg BW have the same effect with a positive control (glibenclamide) in lowering blood glucose level on diabetic rats (p>0,05). MACFP ethanol extract with dose 500 mg/kg BW had the highest percentage of decrease in blood glucose level (42,62%), followed by doses 375 mg/kg BW (37,26%) and 250 mg/kg BW (24,12%).
Performance of LLBC-based rotor blade for low speed wind turbine
Authors: Setiawan A. , Al Gifari M. M. , Hamidah I.
Published: September 2018

The development of wind turbine attracts more attention as a renewable energy that supports green technology. Layer Laminated Bamboo Composite (LLBC) is a bio-composite with bamboo base material which is abundant material and has a relatively lower price. Therefore, LLBC is a prospective material for rotor blades of low speed wind turbine. This study investigates the performance of the LLBC-based rotor blades that have been successfully made previously. This research uses experimental method. Performance of the LLBC-based rotor blades is tested by wind tunnel experiment and then compared with the fiber-based rotor blade available in market. The results showed that the LLBC-based rotor blades require wind speed of 4.6 m/s to start rotation, while for the fiber-based rotor blades requires wind speed of 4.7 m/s. Electrical power generated by the LLBC-blade is still lower than generated by standard blade (fiberglass). At wind speed of 8 m/s, a vibration occurs that reduce performance of the blades. We conclude that LLBC is a potential material for rotor blades of low-speed wind turbine.
Improving PEM fuel cell performance using in-line triangular baffles in triple serpentine flow field
Authors: Fahruddin A'rasy , Ichsani Djatmiko , Taufany Fadlilatul
Published: September 2018

Baffles in the Polymer Electrolyte Membrane (PEM) fuel cell flow field increase the reactant pressure to gas diffusion layer, enhance reactant mass transfer to the catalyst layer and water discharge under the rib, which in turn improve cell performance. In this study, we perform numerical simulations to investigate triangular baffles configuration in triple serpentine flow fields and compare it with flow field without baffles on cell performance. A 9-layer PEM fuel cell model with 14 cm2 active area is used. Baffles are arranged in line with single row and two rows transversely to the flow direction. Different flowrate is applied for optimization. In addition, the use of reducers in exhaust is also studied. The results show that flow field with baffles configuration can improve power density by 8%, while current density increase 6% when compared to non-baffles flow field.
Application of green building concept in the basement area of indonesia computer university
Authors: Soegoto Herman S. , Abioso Wanita Subadra
Published: September 2018

One of the aspects that need to take into consideration in the matter of constructing the building, particularly multi-storey building is the aspect of power efficiency that would be used mainly for the utilization of electrical energy. The building Engineer will attempt to fulfill the building owner expectation by creating designs for the building that may help to save more energy as well as lowering the operating cost. The objective of this research is analysing benefits and costs from the construction of a building by taking into account energy efficiency aspects with applying a case study to three basement unit which is located in Universitas Komputer Indonesia. This research using quantitative analysis to evaluate the installation and energy cost saving of the basement air circulation system and equipment. The result indicates that the building especially the basement area where the air circulation is quite good and a precise air fan on-off control system could reduce the cost of electricity from the continuous operating of exhaust fan and fresh air blower.
CFD analysis of number of blades on the performance of counter rotating wind turbine designed using blade element momentum theory under transient condition
Authors: Pamuji Didit Setyo , Bramantya Muhammad Agung
Published: September 2018

Unsteady CFD simulations on the effects of number of blades on counter rotating wind turbine (CRWT) were carried out in order to investigate the performance and the flow characteristics. In this paper, 2-bladed and 3-bladed CRWT were designed using Blade Element Momentum Theory (BEMT) which comprised of S833, S834, and S835 airfoils. As a comparison baseline, a SRWT model which have similar design with front rotor of the 3-bladed CRWT would be also investigated. It was found that the SRWT had the same rotational speed with the front rotor of the 3-bladed CRWT. There was about 10.24 % and 11.79 % rotational speed reduction of the rear rotor from the front rotor of 2-bladed CRWTs and 3-bladed CRWTs, respectively. Both of 2-bladed CRWT and 3-bladed CRWT have higher total power than SRWT, thereby generating more larger velocity deficits in the wake flow.
The effects of surface tension on the spreading ratio during the impact of multiple droplets onto a hot solid surface
Authors: Arizona Rafil , Wibowo Teguh , Indarto Indarto , Deendarlianto Deendarlianto
Published: September 2018

The impact between multiple droplets onto hot surface is an important process in a spray cooling. The present study was conducted to investigate the dynamics of multiple droplet impact under various surface tensions. Here, the ethylene glycol with compositions of 0%, 5%, and 15% was injected through a nozzle onto stainless steel surface as the multiple droplet. The solid surface was heated at the temperatures of 100 °C, 150 °C, and 200 °C. To observe the dynamics of multiple droplets, a high speed camera with the frame rate of 2000 fps was used. A technique of image processing was developed to determine the maximum droplet spreading ratio. As the result, the surface tension contributes significantly to maximum spreading ratio. As the droplet surface tension decreases, the maximum spreading ratio increases. The maximum spreading ratio appears when the percentage of the ethylene glycol is 15% at the temperature of 150°C. From the visual observation, it is shown that a slower emergence of secondary droplets (droplet splashing) is carried out under a lower surface tension. Hence, surface tension plays an important role on the behavior of emerging secondary droplets. Furthermore, results of the experiments are useful for the validation of available previous CFD models.
Energy and exergy analysis of dry-steam geothermal power plant: Case study in kamojang geothermal power plant unit 2
Authors: Setyawan Nova Dany , Pambudi Nugroho Agung , Utomo Frandhoni , Saputro Herman , Adiprana Reza , Saw Lip Huat , Gürtürk Mert , Rudiyanto Bayu
Published: September 2018

The Government of Indonesia is committed to realize a policy of 35,000 Megawatt (MW) of an additional supply of electricity within 5 years (2014-2019). The projection of this capacity is largely supported by fossil fuel power plants and a small portion of renewable energy. One of the renewable energy which currently has great potential in Indonesia is the geothermal. Therefore, improving the capacity of geothermal is needed to support the policy. The Kamojang is one of the largest geothermal power plant in Indonesia with an installed capacity of 235 MW from 5 generating units. The purposes of this research is to calculate the energy and exergy analysis at Kamojang geothermal power plant. To improve the capacity, exergy analysis can be used by employing the thermodynamic method. In this research, unit 2 of Kamojang's plant is employed. The analysis was examined by using the Engineering Equation Solver (EES) code. The results show the first law of efficiency was calculated at 19.03% and the second law of efficiency at 40.31%.
The morphology and filtration performances of poly(ether sulfone) membrane fabricated from different polymer solution
Authors: Fahrina Afrillia , Maimun Teuku , Humaira Syarifah , Rosnelly Cut Meurah , Lubis Mirna Rahmah , Bahrina Intan , Sunarya Rahmat , Ghufran Ahmad , Arahman Nasrul
Published: September 2018

The performance of membrane filtrations are mostly determined by pore structure of the fabricated membrane. Selection of polymer and solvent in membrane preparation are influence the morphology of fabricated membrane. The present work discusses the morphology of PES membrane fabricated from different polymer system with constant preparation condition. Polymer system consists of 15 wt% of polyethersulfone (PES) and 85 wt% of solvents. The homogeneous solution includes of PES-dimethyl sulfoxide (DMSO), PES-dimethylformamide (DMF), and PES-N-methylpyrrolidone (NMP). The purpose of this research is to investigate the effect of the types of solvent on the formed membrane morphology. Phase inversion technique is used to solidify the flat sheet membrane in deionized water as a coagulation bath. The scanning electron microscopy (SEM) was used to observe the morphology of membrane. A dead-end ultrafiltration module was carried out to observe the filtration performance of the fabricated membrane. It is proved that the different membrane solution affect the membrane structure in term of skin layer, macrovoid, and support layer. Furthermore, the changing of the membrane structure affected the pure water permeability (PWP). It is found that the highest PWP was reached up to 4.52 L/m2.hr.atm using PES-DMSO system.
Proposing mathematical model for seawater intrusion phenomena in the coastal aquifer
Authors: Purnaditya Ngakan Putu , Soeryantono Herr , Marthanty Dwinanti Rika
Published: September 2018

Seawater intrusion is one of groundwater quality problem which in this problem, the mixing between freshwater and saltwater in the coastal aquifer occurs. Mathematical modelling can be formulated to describe the mechanism of this phenomena. The main objective of this research is to develop the mathematical model of groundwater flow and solute transport that applicable to seawater intrusion mechanism. This mechanism is arranged as a differential equation and distinguished into 3 equations. The first equation is groundwater flow equation in dependent-density. It means that the density of groundwater (ρ) changes in spatial and temporal domain due freshwater and seawater are mixed in the coastal aquifer. The second equation is solute transport. Like as groundwater flow equation, in solute transport equation there is a change of solute concentration (С) in the spatial and temporal domain. The last equation is the relationship between groundwater density (ρ) and solute concentration (С). Special case for the third equation, in which this equation is adopted from USGS Seawat model. The first equation and second equation are governed by Eulerian mass conservation law. The main theoretical consideration of governing groundwater flow equation is such as fluid and porous matrix compressibility theory, Darcy's law for groundwater in motion theory and some properties of soil. In other hands, solute transport is involving advection transport and hydrodynamic dispersion transport. Hydrodynamic dispersion is arranged by diffusion Fick's law and dispersion in porous media theory and it depends on transversal and longitudinal dispersivity. Using Jacob Bear's theory which states that fluid density as temperature, concentration and pressure function, authors obtain three primary variables in this model. Those variables follow fluid density (ρ), total head (h) and concentration (С). In this model, isotropic and isobar condition is considered, hence fluid density (ρ) is a function of concentration (С) only. Finally, from this research, authors wish this mathematical model is applicable to modelling, describing and predicting seawater intrusion phenomena theoretically.
Design and building motion capture system using transducer Microsoft kinect to control robot humanoid
Authors: Maulana Gun Gun , Erdani Yuliadi , Budiyarto Aris , Purnomo Wahyudi
Published: September 2018

Currently the development of robots has reached a high level of complexity. However, it is also accompanied by increasing complexity problems in its control. Some control with the image processing method also requires competent operators, at least memorize each command used. Therefore, to reduce the complexity in its control, in this research robot control, especially humanoid robot is made using motion capture method. Motion capture is a control technique using a camera transducer in the form of Microsoft Kinect, to obtain the coordinate skeleton of the joint user. Furthermore the data is processed in Visual Studio software to obtain the angular information that will be formed by the robot. So that the robot can perform the same movement with the user. The information is transmitted wirelessly to the microcontroller contained on the robot in real-time. The results of research showed that the system can translate the user's movement into information movement of humanoid robot. With an average skeleton vector detection error of 1.69 cm, an average response time of 1.3 seconds and an absolute error average position of the end effector on the x axis of 3.2 cm and on the y-axis of 1.28 cm.
Design of the automatic shoe dryer
Authors: Latifah Ayu , Aulawi Hilmi , Ramdhani Muhammad Ali
Published: September 2018

Shoes are parts of basic human needs. Many of them are typically selected based on different needs of the users. There is always a problem related to shoe care. In many cases, people prefer laundry services to take care of their shoes, but it commonly takes a long duration, about one to two days. Another thing is that the drying process is done through direct sunlight exposure, and that can damage the materials and fade the colors. Therefore, this system is designed and implemented to facilitate the process of drying shoes and protect some shoes that cannot be dried using sunlight. The hardware design is featured with control and software, which are then implemented for further analysis to obtain the desired results. The whole system control is derived from the ladder program within the Programmable Logic Control (PLC). To identify shoes that have been dried or ones that cannot be detected by the SHT11 temperature and humidity sensor, which is connected to the ATmega16 microcontroller as a serial data communication. The implementation resulted in a novelty, namely digital automatic shoe drying system without the use of sunlight.
Empirical base solar reflective array accumulator design simulator
Authors: Setiawan Budhy , Wakidah Riska Nur , Raden Edy P , Annisa Maulidia D , Yulianto Yulianto , Widjanarko Widjanarko
Published: September 2018

Sun energy in Indonesia is 5Kwh/m2/day average per year. This alternative energy can be convert to solar thermal up to 80% efficiency, the percentage is highly significant compare to electric conversion that only has 20%. To provide any process requirement for heating, an empirical research of reflective array accumulator has been done, so that a design simulation for the accumulator has to be held. The accumulator can be used as a heat energy supplier for drying, egg hatching, food oven and other requirement. The sun energy trapping method is a reflective array. This method aims to maximize the energy captured and stored in an accumulator and has to be maintained for 24 hours by opening and closing the array. This simulator will calculated and control some input such as water mass, accumulator temperature, environment temperature, humidity and sun intensity. The array control performance to watch diffuse solar light intensity by time. The result of the simulation will give absorption storage capability, insulation capability to watch sun energy performance per day. It is expected that with the simulation, it can simplify the design of the accumulator and improve the efficiency of heat energy storage. The absorption capability perform 72%.
Delay reduction of transmission control protocol in WiMAX by prioritizing the acknowledgement packets
Authors: Suherman Suherman
Published: September 2018

Transmission Control Protocol (TCP) provides reliable connection by acknowledging every transmitted packet. The faster the acknowledgement (ACK) packet is received, the quicker the next TCP window is sent. Previous study shows that by prioritizing the ACK packet route, the TCP delay for the whole data transmission is reduced. This article utilized the medium access within WiMAX network, which is the scheduler, to prioritize the ACK packet transmission. The NS-2 evaluations with various data rate transmission show that the WiMAX scheduling to prioritize the ACK packet successfully reduces the whole data transmission delay. In average, a thirty-second video duration takes 755 ms faster when prioritized ACK is applied.
Effect of load current harmonics on vibration of three-phase generator
Authors: Kastawan I Made Wiwit
Published: September 2018

Almost all today electrical loads are considered non-linear such as switch mode power supply (SMPS) for powering computer and mobile phone or variable speed drive (VSD) for driving home and industrial electric motors. These loads generate ac non-sinusoidal current containing a lot of harmonics as indicated by its high total harmonics distortion (THD) figure. Current harmonics bring negative effects into all electrical power system components, including three-phase generator. This paper provides analysis of load current harmonics effects on vibration of three-phase generator. Three different laboratory experiments have been conducted i.e. three-phase linear resistive loading, non-linear loading with a three-phase ac/dc converter and non-linear loading with three single-phase capacitor filtered ac/dc converters. Results show that the higher load current harmonics content the higher is vibration of the three-phase generator. Non-linear loading with a three-phase ac/dc converter that generate about 24.7% THD gives an increase of 4.3% and 5.5% in average of vertical and horizontal vibrations of the three-phase generator respectively. Further, non-linear loading with three single-phase capacitor filtered ac/dc converters that generate THD as high as 74.9% gives significant increase of 28.1% and 23.6% in average of vertical and horizontal vibrations respectively.
Electret condenser microphone as a traditional Chinese medicine arterial pulse sensor
Authors: Yudaningtyas Erni , Djuriatno Waru , Khabib Achsanul , Santjojo Dionysius J.D.H.
Published: September 2018

Arterial pulse signal reading by a therapist in Traditional Chinese Medicine (TCM) requires considerable experience and thoroughness. The interpretation resulted by the therapist is very subjective. The objectivity of the device can be achieved by increasing the accuracy and the consistency of the reading in the range of 1-2 Hz. An electret condenser microphone (ECM) can be used as a pulse sensor in such device. This study reveals that ECM performs a number of advantages such as small-sized and inexpensive. Unfortunately, this ECM also picks up mechanical noises during direct contact with the subject. This study proposed soft silicon rubber as a medium between subjects and ECM. The technique was designed to enhance the mechanical coupling between the ECM and the source signal without affecting the signal source. The results show that the ECM could measure the signal of 0.5-10 Hz with the average accuracy of 99,47%.
Simulation the effect of anode-cathode displacement and anode type on reinforced concrete cathodic protection using BEM
Authors: Fonna Syarizal , Huzni Syifaul , Putra Muzaiyin Arika , Kurniawan Rudi
Published: September 2018

The aim of the study is to simulate the effect of anode-cathode displacement and anode type on the potential distribution of reinforced concrete (RC) cathodic protection (CP) system using boundary element method (BEM). For the simulation, Laplace equation was used to model the RC domain. The boundary conditions for the anode and cathode (reinforcing steel/rebar) were represented by its polarization curve. By using BEM, the electrical potential values on the whole domain should be calculated. Therefore, the effects of those parameters were studied based on the rebar electrical potential. For the study, the CP system model and geometry were obtained from a previous researcher. The BEM simulation results show that the anode-cathode displacement affects the distribution of electrical potential on the protected reinforcing steel. It was consistent with the previous research result. The results also show, as expected, that the anode type influences the electrical potential value on the rebar. Hence, those parameters should be considered in designing and/or evaluating the RC CP system.
Electric current effect on mechanical properties of SMAW-3G on the stainless steel AISI 304
Authors: Widodo Edi , Iswanto Iswant , Nugraha Mirtza Adi , Karyanik Karyanik
Published: September 2018

Parameters in the welding need to be known because the effect on the mechanical properties of the material after the welding process. This research purposes to find out the influence of variation of SMAW welding current on Stainless Steel AISI 304, with variation of electric current equal to 70A, 80A and 90A.The electrode of AWS A5.4 E308-16 with diameter of 2.6 mm is used. Dye penetrant test, tensile test and metallographic test applied to analysis the characteristic. Based on data from tensile test results obtained the highest value on the specimen welding current 90A is equal to 632 MPa. The lowest tensile strength value recorded on the specimens of current 70A is 498.66 MPa.
Mapping the potential of green energy to border societies of Indonesia and Timor Leste (a preliminary study)
Authors: Fios Frederikus
Published: September 2018

The fulfillment of renewable energy supported by environmentally friendly technology is important for the Indonesian people especially in the border areas of Indonesia and Timor Leste today. This is a preliminary study that aims to map the possibility of wind energy in the border areas of Indonesia and Timor Leste, especially in North Central Timor District, East Nusa Tenggara Province, Indonesia. The method of research is the qualitative method with participatory observation approach. The results of the study found that the potential of wind energy in Mount Ainiut that can generate electricity of 7 x 3.5 = 24.5 Megawatts can be consumed 20,000 homes and small industries scattered around the West Timor Region. Local people are also open to accept the construction of microgrid electric technology facilities based on wind energy that is environmentally friendly. The findings of potential wind and acceptance of local communities can be important information for the Indonesian government to adopt relevant policies to support development efforts to provide electricity for communities in Indonesia's border regions of Indonesia and Timor Leste where satisfactory electricity needs are not yet met. Collaboration of the private and government sectors, especially the ministries in charge of the mineral resources of the Republic of Indonesia is very important. This has a positive impact on the economic growth of societies in the border areas of Indonesia and Timor Leste.
Removing cyanide by mixed culture at liquid media with variation in pH and cyanide concentration
Authors: Valentina Corry , Hadisoebroto Rositayanti , Rinanti Astri
Published: September 2018

This preliminary study aims to investigate removal efficiency of cyanide by mixed culture Thiobacillus sp. and Clostridium sp. in a liquid media stone mineral salt solution (SMSs) with controlled condition. This research variation were pH 5, 7, and 9 and cyanide concentrate (ppm) 100, 300, and 500 within erlenmeyer 300 ml, for 48 hours at 30°C. In this research, cyanide artificial (KCN) was presented in liquid media. Analysis of cyanide concentration on liquid medium was done by Gas Chromatography - Mass Spectrometer (GC-MS) method. From the research, it was found that the cyanide removal was 50%, 55%, 53% for cyanide pH variation 5, 7, 9, respectively. In pH 7 was obtained a cyanide removal result of 55% and while for concentration (ppm) 100, 300, 500 each resulted in allowance of 45%, 57% 60%. The higher removal 60% is established at concentration of 500 ppm and pH 7. It could be concluded that mixed culture Thiobacillus sp. and Clostridium sp. could be an alternative to remove cyanide from contaminated water until concentration of 500 ppm with removal percentage of 60%.
Simulation of effective volume increasement inside oxidation ditch reactor
Authors: Hadisoebroto Rositayanti , Bindar Yazid , Notodarmojo Suprihanto
Published: September 2018

Oxidation ditch reactor is wastewater treatment unit that based on activated sludge process. Water flow characteristic inside reactor is either completely-mixed reactor or plug flow reactor. Water flow characterization plays important role in wastewater treatment process. To ensure the biological process going well, the water flow in reactor must be completely mixed type. Characterization study of water flow in reactor consume time thus financial, so the simulation using CFD (Computational Fluid Dynamics) becomes a good solution. Based on the calibrated model, the CFD simulation was generate to define the water flow characteristic of the oxidation ditch reactor in longitudinal section. The simulation was conducted using VoF (Volume of Fluid) scheme, an open surface model in unsteady flow with k-ε turbulence model. The simulation result shows that water flow inside the oxidation ditch reactor was plug flow. The role of aeration system is to increase water flow to be more homogen, indicated by higher effective volume inside the reactor. The simulation result shows that the aerator could increase effective volume inside the reactor from 32,94% into 55,5%. The higher effective volume means dead zone inside the reactor is reduced.
Application of lean manufacturing method and BLOCPLAN algorithm for productivity improvement of a laundry soap bar production
Authors: Tarigan Ukurta , Tarigan Uni Pratama P , Rifangi Akbar Rizky
Published: September 2018

The problem experienced by the manufacturing company that produces soap bars is the waste in its production process. The research objective is to reduce waste in the production process flow in terms of distance of displacement of the material nor heap of material of the production process of laundry soap bars so it can increase the productivity. To solve the problem, implementation integration of lean manufacturing and BLOCPLAN algorithm is used. In the early stages, value-added activities and activities that are not value-added is identified through the depiction of value stream mapping, and value-added activities that are not reducible to the application of the principle of 5W and 1H. To get the total minimal distance to move materials, it is necessary to re-layout production facilities with BLOCPAN algorithm. Future state mapping is used to get an idea of the final result, in which all non-value added activities can be reduced, and the shorter lead time obtained in the production process. With the application of those two methods, process cycle efficiency is increased 33.62% resulting in increased productivity of the company amounted to 204 packs of soap bars each day.
Optimization of saving production cost in plastic jute sacks with dynamic programming
Authors: Sari Rahmi M , Tambunan Mangara M , Syahputri Khalida , Anizar Anizar , Siregar Ikhsan , Indah Rizkya T
Published: September 2018

The plastic jute sack is one of the most popular rice packaging products in the market. One type of plastic jute sack used is LDPE type. The LDPE sacks used for rice packaging often-experiencing fluctuations in market demand. Fluctuating demand is a certain problem for companies in determining the number of production to meet the demand. It can be seen from the frequent over production companies and stock out at each period. Overproduction problem has an impact to increase production costs. Stock resulted in lost sales experienced adversely affected the company, especially from production cost. Based on the problems, the company must immediately performs an optimal production planning to handle various problems in the company. One method for saving the optimal cost production can be used is dynamic programming. This method aims to obtain the optimal number of production accordance to market demand. This research is done to reduce cost by optimizing number of production. Method that used to solve the problem is dynamic programming. By using this method, the company will obtain optimum production number with minimum production cost and considering total capacity available of the company. From the dynamic programming results obtained optimal production number with cost savings about 2.1%.
Redesigning layout in the palm oil tank plant to enhance the utility
Authors: Sembiring Anita Christine , Budiman Irwan , Tarigan Hardianta
Published: September 2018

Material transfer is one of the most important activities in the production process activities and has a close relationship with the design of the layout of production facilities. A manufacturing company engaged in the manufacture and assembly of machine spare parts at the oil palm plant constraints in terms of material handling so that the decline in utility of the production floor layout and the increasing cost of moving raw materials. To improve the utility on the production floor using group technology method that is Rank Order Clustering (ROC) and Similarity Coefficient (SC). From the result of matrix rank calculation in pairs or between machines then SC method is the best layout design with decreasing material displacement moment by 56,86%. And to improve the layout of facilities on the production floor using BLOCPLAN algorithm that is the value of the degree of Adjency Score of 0.5317. This proposed layout provides a smaller displacement moment so as to shorten the processing time of all parts by 338 minutes and increase utility on the production floor.
Physical design development for evaluate digital library application based on modified CSE-UCLA with weighted product
Authors: Divayana Dewa Gede Hendra , Suyasa P. Wayan Arta , Abadi Ida Bagus Gede Surya
Published: September 2018

Digital library as one of the supporting services of information technology-based learning process has been found in many universities, but in the implementation, there are still many obstacles. Therefore, it is necessary to evaluate using appropriate tools to obtain accurate results. Based on that, the primary purpose of this paper is to explain the physical design of applications that apply the modified CSE-UCLA model with weighted product method, so it can be used to evaluate the digital library. Subjects involved in conducting trials on this application for digital library evaluation are four peoples consisting of two educational experts and two informatics experts. The location of the experiment was done in one of the computer universities in Bali Province. The tool used to collect data of trial result is in the form of questionnaires. The analysis technique used is descriptive quantitative concerning the quality percentage of each trial aspects. The results obtained from this study were average percentage of evaluation application quality of 92.00% belonging to the excellent category, so it can be concluded in general that applications were ready for use to evaluate the quality of digital library services.
Mobile Braille Touch Application for Visually Impaired People using Double Diamond Approach
Authors: Cahya Rony Aldhea Dwi , Handayani Anik Nur , Wibawa Aji Prasetya
Published: September 2018

Reading and writing in Braille learning using technology for visually impaired people has been available in various forms. One of Braille learning has been developed using smartphone is Mobile Braille Touch (MBT) application. MBT developed is far from perfect, system on MBT still use static keyboard. The button touch in MBT is not effective, so the user cannot touch the button properly. Therefore, Mobile Braille Touch application further developed based on user experiences (UX) correspond with user needs. In this research, we use a Double Diamond method which consists of (1) Discover, (2) Define, (3) Develop, (4) Delivery. The result of this research is developing of new Virtual Braille Keyboard (VBK) that called as dynamic keyboard. This VBK consist of dynamic dot braille and swipe writing assisted button.
Design of Android Interactive Multimedia for the Concept of Aromatic Compound
Authors: Amaliyah Laely , Irwansyah Ferli Septi , Windayani Neneng , Ramdhani Muhammad Ali
Published: September 2018

Some organic chemistry lectures material is abstract. The lack of development of appropriate learning media has become one of the causes of the difficulty of the student in understanding organic chemistry. The purpose of this study is to create interactive multimedia that can facilitate students in studying the material of organic chemistry course especially on the concept of aromatic compound. To support this research, methods of Research and Development used in this study. Stages of research done with the development of design and manufacture of applications on the Android operating system and analyse the results of limited trials. Based on the results of the study, the manufacture of interactive multimedia on this Android system has the potential to be applied to the learning of organic chemistry especially on the aromatic compound subject. It is because the existence of interactive multimedia makes it easier for the student to study organic chemistry especially on the concept of aromatic compound.
Comparison of Three Methods of Length Compensation in a Parallel Kinematic and Their Equivalence Conditions
Authors: Du Shucen , Schlattmann Josef , Schulz Stefan , Seibel Arthur
Published: September 2018

This paper is a further development of a previous work (PAMM 16, 51-52). In this paper, we derive an analytical formulation of the linear actuators’ length variations for a 2-1-2 DOF joint designed parallel hexapod based on Riebe and Ulbrich’s method (Arch. Appl. Mech. 72, 817-829) and the Euler angles based matrix method. The equivalence conditions as well as the computation errors are given and compared with a quaternion based method.
Reliable Design: Basic Approach
Authors: Stodola Jiří , Furch Jan
Published: September 2018

The knowledge and experience learnt from product designing have resulted in development of their reliability theory. The classical concept of safe – life is based on product over dimensioned design that considers safety factor or safety margin for measure. However, practical engineering has found this concept in a manner inconvenient as design fault-resistance to determine the ultimate condition and operating stress are random values. A way out is in the concept of stochastic approach to reliability design resulting from the defect-production probability distribution law. That concept allows product designing with predetermined reliability, such as in the example contained in this paper.
An Improved Method of Geomagnetic Aided Inertial Navigation Algorithm with Gyro and Accelerometer Error Corrected Online
Authors: ZhongGuo Song , Jiuxiang Gao , Jinsheng Zhang , Xiaoli Xi
Published: September 2018

In consideration of the problem that traditional geomagnetic aided navigation method cannot reduce the scaling error of indication track in inertial navigation system (INS), which will further limit the error correction precision of gyro and accelerometer, an improved geomagnetic matching algorithm based on affine transformation is proposed in this paper. A geomagnetic matching algorithm led to the optimal affine transformation solution by Procrustes analysis is presented and develops latitude and longitude reference information. Then a 13-dimensional-state extended Kalman filter which estimates the attitude misalignment angles, the position error, the velocity error, the Gyro drift, and accelerometer error is introduced to continuously update the output of INS and remove the accumulative error. The results show that geomagnetic aided navigation based on improved algorithm has better location accuracy and correction accuracy of INS than the traditional method.
Numerical Analysis of the Adiabatic and Quasi Steady Model of Free Piston Stirling Engine
Authors: Sowale Ayodeji , Kolios Athanasios J.
Published: September 2018

This study presents the numerical simulation of the adiabatic and Quasi steady models of the free piston Stirling engine, the mathematical equations are presented, and design parameters are determined and used as input for the simulation. The simulations are computed under adiabatic and Quasi operating conditions, and their output results are compared. The similarities and differences in the model predictions in terms of the pressure to volume diagram, the amplitudes of the pistons and displacer, temperature, efficiency, power output and stable operation are observed and investigated. The models are validated against the experimental output and the results show a good agreement with the experiment. The adiabatic model predicted an output power of 862 W, while Quasi steady model predicted more accurate output power of 997W at frequency of 30 Hz in relation to the 1000 W of the experimental output. The effects of the variation of engine’s parameters on the output power are also observed and presented.
Deep sub-micron ESD GGNMOS layout design and optimization
Authors: Jun Shi
Published: September 2018

In the field of integrated circuits, ESD (Electro Static Discharge) has always been a rather serious problem of reliability. Enhanced ESD tolerance of IC chips became a focus of research on IC failure protection design. The thesis is better to solve the multi-fingered non-uniform conduction of ESD devices under electrostatic pulse. Layout parameters DCGS (Drain-Contact to Gate Spacing), SCGS (Source-Contact to Gate Spacing) and BS (Substrate-source spacing) size in the paper can be used as reference for ESD GGNMOS (Gated Ground NMOS) layout design. Also this paper provides setting the DRC (Design Rule Check) command to check the distance between the N+ diffusion regions of different potentials so that ESD failure is prevented effectively. TLP (Transmission Line Pulse) current pulse signal is adopted to measure characteristics of the GGNMOS. The thesis descripts a ESD Optimal layout design from five aspects of introduction, Key elements of ESD circuits layout design, ESD layout optimization, a ESD GGNMOS layout instance and conclusion.
Design and Validation of Deployable and Lockable Mechanism for Gossamer Spacecraft
Authors: Liang Sun , Ming Ji , Haizhi Li , Jin Wang , Changxi Kang , Bin Yan , Lei Yao , Zongyu Kou
Published: September 2018

This passage introduces the researches of Deployable and Lockable mechanism for a new Gossamer Spacecraft built by space apply which can be locked and deployed by its own. This mechanism integrates deploying and locking. Its advantages are simple and reliable. It is based on a serious project “Platform Technology of Gossamer Spacecraft” from Lanzhou Institute of Physics. This project manufactured a model machine, finished the ground experiment, passed the project check. This passage introduces work theory particularly, builds the dynamics models, analyzes experiment results factors and presents measurement methods. Results show that the mechanism designed can meet the project requirement; it can build the foundation for the super-large Gossamer Spacecraft of China and improve the degree of the Aerospace technology application.
Multi-aircraft Rerouting Method Under Dangerous Weather
Authors: Zheng Yukun , Wang Ying , Sun Yun , Qi Yao , Wang Ning
Published: September 2018

In view of the problems that single-aircraft rerouting method existing in civil aviation considered little about the associated effects of multi-aircraft and route network characteristics. A multi-aircraft rerouting method under dangerous weather was proposed. Based on the characteristics of network failures during the occurrence of dangerous weather, the performance indicators and related constraints of temporary routes are analyzed to establish a singleaircraft rerouting model. Then, a multi-aircraft rerouting model based on layout of diversion points was proposed in combination with the performance indicators of the rerouted route network, and solved by NSGA-III algorithm. Finally, a simulation analysis was conducted using the regional flight route network in part of the Beijing Flight Information District as an example and the results show that multi-aircraft rerouting method can effectively avoid flight conflicts and improve the comprehensive characteristics of the network.
Dynamic analysis of wing deployment of high altitude balloon launched small size folding-wing UAV
Authors: Zhang Hangyue , Yang Yanchu
Published: September 2018

The batch launch of small folding-wing UAVs by high altitude balloon at high altitude is a new technology in recent years. The wing deployment process at 20km altitude is analyzed, and mathematical model of the wing delivery is established. Using the multibody dynamics analysis software ADAMS simulate the wing deployment process in order to verify the correctness of the model established. Then, the impact of the wing with final velocity on the fuselage is analyzed, and an elastic locking mechanism is designed to reduce the impact. The analysis process provides a certain reference for the task design of balloon-UAVs and the folding mechanism analysis.
Tension modeling of package binding belts in cargo spacecraft
Authors: Yuan Weifeng , Dai Hailin , Du Ruizhao
Published: September 2018

At the site of cargo package binding in cargo spacecraft, the binding belt tension is loaded with a ratchet device. It is determined by experience of operators, therefore it’s difficult to quantify the force and the reliability of the binding belt is low. Based on the dimension analysis method, a semi-quantitative model was established between the binding belt tension and the ratchet force of the fastening device. The motion of the binding process was carefully observed and analyzed based on Analysis of Therbligs. On this basis, the standard packing process is developed, which improves the repeatability of loading and packing pre loading. A loading test platform for cargo loading is built with small tension sensor and tension tester, and a large number of tension data and ratchet force data are obtained. Based on the least-squares linear data fitting, four coupling models for the four binding belts were established. The coupling model verification experiments show that the calculated values are in good agreement with the measured values, and the errors are mostly lower than 5%. The model can be applied to the quantification of the binding belt tension.
A Nonlinear Second-order Spacecraft Attitude Tracking Control Model for Control System Stabilization
Authors: Wang Xiaoyi
Published: September 2018

A control model for the direct parameter approach for spacecraft attitude tracking is presented in this paper. First of all, the spacecraft attitude tracking control model is built up by the error equation of the second-order nonlinear quaternion-based attitude system. A problem of control system stabilization is raised based on the control model. Compared with other control models, the second-order can offer the advantages of noapproximation and clear control states. The basic spacecraft control model has to focus on to the two variables which are angular rate and attitude quaternion, however, the new attitude control problem is only with respect to one variable which is the spacecraft attitude quaternion. Therefore, the second-order model is simpler and clear than basic first-order model.