bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance of impedance measurement algorithm applied in line with a compensation circuit
Authors: Rohadi N 
Published: September 2019

Abstract
This paper describes a performance of impedance measurement algorithms of SEL-421 distance relay protection when applied to protect series compensated line during fault conditions. The Performance is carried out by varying the value of uncertainty parameters to the accuracy of the impedance measurement algorithm of the relay for the simulated faults, which is measured from the located relay to the fault points. Experiments were carried out with a combination of DIgSILENT PowerFactory software to model and simulate electrical power protection systems with a system voltage of 400 kV and a line length of 300 km with compensation circuit placed in the middle of a protected transmission line. For a fault simulated 0.45 p. U in front of compensation circuit, the relay still works correctly. However, there will be an operation failure of the relay for the fault simulated at 0.8 p. U behind compensation circuit. Faults simulation and performances are performed automatically through the algorithm developed using the DIgSILENT Program Language (DPL). From the enclosed results, the developed method is applicable for testing the performance of the IEDs algorithm.
Improving the quality and quantity of cinnamon drying process using art cave in Lambung Bukit West Sumatra
Authors: Baiqi A U , Utami P P , Anugrah D , Fauzan A A , Ningsih W S , Rusydi M I 
Published: September 2019

Abstract
Cinnamon processing in Padang City constraints when processing cinnamon barks under direct sunlight due to its dependence on weather and vulnerability to dust and animals. Hence, a machine were introduced to a cinnamon drying device named Art-Cave (Smart Dryer System for Cassiavera). This machine can dry cinnamon barks with humidity below 14% to prevent mushroom growth, while the heating temperature allowed is 60 °C to maintain the content of aetheric oil. The machine provides four shelves that are used as storage. The capacity of each shelf is 5 kg of moist cinnamon barks. After the cinnamon barks are evenly arranged, the stove at the bottom of the machine can be switched on. The heat will flow through the room on the side of the box, and the fan blows air into each shelf. On the top, a fan is installed to blow hot air out of the box — the fan functions to maintain the machine temperature on the limit of 60 °C. Therefore, the farmers can improve the drying process from 30 kg/day to about 80 kg/day as well as maintain the demanded ambient temperature by utilizing the machine.
Shape object selection using the chi-square method
Authors: Kurnia R , Kurnia F , Fitrilina  
Published: September 2019

Abstract
This paper is focused on identifying the shape the shape of the object. There are some basic shape objects such as rectangle, circle, triangle, square, hexagonal, an ellipse. The method that used in this paper was chi-square feature selection to select a relevant feature toward those basic shape objects. Then, the proximity calculation between the training image and real image that was already available in the database. The chi-square feature selection process eliminates the irrelevant features in each figure that was in the image database. As final results, the system succeeds to detect an appropriate shape of an object by determining the distance of Euclidean between training image and the real image.
A wireless monitoring system for comparison photovoltaic and photovoltaic thermal characteristics
Authors: Krismadinata  , Lapisa R , Asnil  
Published: September 2019

Abstract
This paper proposes a prototype of a wireless monitoring system. It was employed to compare the electrical characteristics of two solar modules of the same type and size. One of the solar modules on the bottom side is mounted a copper pipe for circulating water (as call photovoltaic thermal). This system serves as a heat absorption on the bottom of the solar module. The experiment is conducted at the same time, place, and sunlight intensity conditions for both solar modules. The characteristics of open circuit voltage, short-circuit current, temperature upper side, temperature bottom side and the irradiation of sunlight from the two solar modules are observed. The low-cost processor, A Tmega 8535 is employed as an embedded system and Visual Basic. Net as Graphic User Interface. The collecting data is processed and displayed graphically. The wireless communication is applied to PC and ATmega 8535. The measuring data is validated to instrument standard. The test results show that photovoltaic thermal generates greater electrical power than solar modules not equipped with heat absorption.
Recognition of horizontal gaze motion based on electrooculography using tsugeno fuzzy logic
Authors: Rusydi Muhammad Ilhamdi , Bahri Mardiah , Ryaldi Rizky Syahreza , Akbar Fauzan , Matsuhita Kojiro , Sasaki Minoru 
Published: September 2019

Abstract
Electrooculography is a biosignal activity generated from the human’s eyes activity. In this research, the eyes movements (left and right) were recognized by processing the EOG signal. The eyes movements in the horizontal movement were identified from the direction and the magnitude of the gaze angle. The direction of the eyes movements was detected using the polarity of the signal whereas the magnitude of gaze angle was computed using Tsugeno fuzzy method with two approaches, namely area of signal and peak of the signal. The system was able to detect the direction of gaze motion with the accuracy of 100%. The accuracy of the EOG signal in calculating the magnitude of the gaze angle was 93.46% for the right and 89.88% for the left. The number was higher compared to the performance of the peak point with the accuracy of 88.06% for the right and 84.79% for the left. The result in this paper showed that the system was able to detect the direction of eyes movements very well. However, the calculation of the magnitude of eyes movements is still a challenge to be improved in the future.
Setup time efficiencies of quick die change system in metal stamping process
Authors: Arief R K , Nurlaila Q 
Published: September 2019

Abstract
The rapid developing of technology today has forced manufacturing companies to widely expands their business and production abilities. Efficiencies in all aspects must be taken to maximized production capacity and reduce waste to survive. Lean’s SMED technique is one of waste reduction method that usually used in manufacturing companies and specifically called the Quick Die Change (QDC) for metal stamping companies. But some research related to QDC only discuss the setup tools and operator movement during setup and process. This research observed the setup process of the die construction that has been modified to be able to reduce the setup time and other time wasted activities. This QDC die construction could save setup time by 60% compared to conventional die and could do more if carefully planned. Research conducted in an automotive spare parts maker in Jakarta wider region that already use this QDC die in their production line.
Optimization of significant factors of cement compressive strength at PT Semen Padang
Authors: Fithri P , Meilani D , Putri N T , Chotimah F H 
Published: September 2019

Abstract
The quality measurement of cement production is focussed on five factors, namely: Blaine fineness (Blaine), SO3 content (SO3), Sieving on 45 µm (Sieve), Loss on ignition value (LOI) and Biomass-to-liquid value (BTL). They were measured when cement was 3rd, 7th and 28th days old. This study analyzed the effect of significant influence using multiple regression analysis and the optimal value of the five factors that affect compressive strength using the Response Surface Method (RSM). The results obtained for Portland Composite Cement(PCC)significant factor for 3rd day: Blaine: 379 m2/kg; SO3: 1.72%; Sieving on 45 µm: 8.78%; LOI: 5.40% and BTL: 7.75%. For 7th day compressive strength: Blaine: 389 m2/kg; SO3: 1.72%; sieving on 45 µm: 9.47%; LOI: 4.17% and BTL: 10.98%. For 28th day compressive strength: Blaine: 388 m2/kg, SO3: 1.78%, sieving on 45 µm: 8.49%, LOI: 4.20% and BTL: 8.18%.
Waste assessment using a lean approach in receiving process of container terminal: a case of Teluk Bayur Port
Authors: Amrina E , Kamil I , Rahmad D 
Published: September 2019

Abstract
This paper aims to assess wastes in receiving process of container terminal using lean approach at Teluk Bayur port. It begins with developing the Value Stream Mapping (VSM) of receiving process of a container terminal in Teluk Bayur port. Value Added Assessment (VAA) is used to identify the wastes that classified into Value Added (VA), Non-Value Added (NVA), or Necessary but Non-Value Added (NNVA). Finally, Failure Mode and Effect Analysis (FMEA) is applied to evaluate the failure modes of wastes and develop the proposed improvements. Through the VSM stage, it is identified eight processes with a total of 28 activities in the receiving process of a container terminal in Teluk Bayur port. The results of VAA show there are a total of 14 non-value activities consist of nine NVA activities and five NNVA activities. In FMEA, it is obtained four failure modes with the highest Risk Priority Number (RPN) related to failed in open stack process, machine problems, failed to manage documents of receiving card and system crashes. It is suggested to update the information in website and notice board, perform regular maintenance to machines, upgrade the machines, provide the proper information of receiving process procedure, conduct routine maintenance to the website, and provide generator engines.
Food packaging development of bioplastic from basic waste of cassava peel (manihot uttilisima) and shrimp shell
Authors: Dasumiati  , Saridewi N , Malik M 
Published: September 2019

Abstract
Development of biodegradable plastics or bioplastics that can be degraded by microorganisms such as bacteria and fungi is one approach to solving the problem of plastic waste. Bioplastic from waste starch and cassava peel shrimp shell waste as filler or reinforcement that has been generated in previous research. This research aims to develop bioplastic packaging into food for direct consumption and packaging. Stages of the study include the manufacture of bioplastics, food safety testing, manufacture and packaging of food products, organoleptic test, and the test period. Utilization of cassava and leather waste shrimp shells for bioplastic packaging is an added value in addressing environmental problems because it is recycled into products of high economic value and environmental.
Effects of different pre-treatment methods on anaerobic mixed microflora for hydrogen production and COD reduction from domestic effluent
Authors: Primasari B , Tamin M Z A , Mustafa M A H 
Published: September 2019

Abstract
Effects of different pretreatment methods on sludge inoculum were evaluated concerning hydrogen (H2) production enhancement and COD (chemical oxygen demand) reduction, using domestic effluent in a batch system. The sludge was taken from a recycled line of the activated sludge reactor. Two types of pretreatment were investigated, heat treatment and chloroform treatment. The experiment was conducted at pH 4-6 and inoculum sizes of microbes were 10%, 20%, and 30% respectively; and experiment without sludge pretreatment was also conducted as control. The result showed that 30% COD reduction was achieved for chloroform pretreatment at pH 3 and 10% inoculum size. For heat treatment, a maximum COD removal of 60% was achieved in the experiment at pH 6 and 10% inoculum size. In chloroform pretreatment, a maximum volume of gas evolved was 3.6 mL, at pH 3 and 20% inoculum size. For heat pretreatment, maximum biogas evolved was 2.1 mL, at pH 3 and 10% inoculum size. The experimental results showed that the pretreatment methods (heat treatment and chloroform treatment) at 35 °C and initial pH 5.5 had a positive influence on H2 production yield and COD removal efficiency during the fermentative H2 production as compared to the control experiments (without pretreatment). Heat treatment method was shown to be a simple and useful method for enhancing both H2 producing and COD removal processes from domestic effluent with highest H2 yield and COD removal efficiency at 0.314 mmol H2/g COD and 86%, respectively.
Effect of garlic oil as lubricant additive into coconut and palm oils on the physical and tribological properties
Authors: Gasni D , Chandra D , Putra A A , Fajri R 
Published: September 2019

Abstract
Palm and coconut oils have used as an alternative source of biolubricant that is environment-friendly and biodegradable lubrication to replace petroleum oil. Due to the lack of physical and tribological properties of biolubricant, the addition of environmentally friendly additive can increase their lubricant properties. Effect of addition of garlic oil as an additive in coconut and palm oils on the physical and tribological properties was investigated and discussed. Oil treatment (OT) was used as a comparison which is known as conventional additive contained ZDDP. The results obtained from physical tribological test showed that the addition of garlic oil into coconut and palm oils had changed physical properties of these oils. Pin on disc test and ball bearing wear apparatus were conducted to study tribological properties of lubricant additives into coconut and palm oils. The addition with 5 wt % of garlic oil into palm oil showed significant improvement in both wear and coefficient of friction. The lubricant was worked very well on mixed lubrication regime stated by the smooth surface texture of inner race of bearings. Even though the results were not as good as OT; garlic oil could be an alternative as an environment-friendly additive.
Corrosion Resistance of β type titanium (TNTZ) in 3%NaCl solution
Authors: Affi J , Gunawarman  , Yetri Y , Fajri H , Juliadmi D , Nuswantoro N F , Nurbaiti  , Fonna S , Tjong D H , Manjas M 
Published: September 2019

AbstractCorrosion resistance of TNTZ in a salted environment has been done using a weight loss method. All samples were immersed in 3% NaCl solution for 2, 4, and 6 weeks. Samples consist of TNTZ (AT), TNTZ (ST), Ti6Al4V ELI, and CP-Ti. The weight of samples was measured before and after the immersion process using digital balance. Microstructure and composition of the sample surfaces were examined by using the optic microscope and EDX, respectively. The lowest corrosion rate after exposure for 6 weeks is CP-Ti while the highest one is TNTZ (AT) that is 0,003 mmpy. All microstructure of samples shows pitting, and crevice corrosion in the surfaces indicating corrosion has been started to occur on the samples. It was found that the corrosion is due to the destruction of the oxide layer in some weak point as a result of chemical reaction between the metal ions with Cl-ions. Some oxides are formed in the surface of titanium as indicated by a significant increment of oxygen content is the corrosive sample surface. This study indicates the corrosion resistance of TNTZ (ST) (β type Titanium) is much better than other materials in this research.
The potential of rising husk fiber/native sago starch reinforced biocomposite to automotive component
Authors: Nusyirwan  , Abral H , Hakim M , Vadia R 
Published: September 2019

Abstract
This work aims to examine the mechanical and thermal behavior of rising husk fiber/starch reinforced epoxy polymer composites. Experiments are carried out to study the effect of fiber and filler volume percentage on the mechanical, and thermal behavior of epoxy-based polymer composites. The volume of fibre and filler is varied by 10%,20%,30%, 40%, and starch 5% and 10% and 1.5%, respectively. The specimens are fabricated by using hand layup technique. The specimens are expurgated according to ASTM standards. The effects of rising husk fiber and filler were examined under different thermal conditions. The mechanical results show that the addition of fiber increased the impact characters of epoxy resin, whereas the addition of starch shell filler increased the termal conductivity of the composite. We found that the results show that the stacking sequences of rising Husk/starch fibers have a significant impact on thermal conductivity. Composites with the stacking sequence mode RH40 with 15 % starch exhibit the highest thermal conductivity 2.6 W/m·K an enhancement of 472,72% over the thermal conductivity of the PC resin (0.55 W/m·K) it is significant
Mechanical and degradation properties of zinc adopted magnesium alloys for biomedical application
Authors: Nanda I P , Hassim M H , Idris M H , Jahare M H , Abdulmalik S S , Arafat A 
Published: September 2019

Abstract
The demand for short-term degradable implant in bone fixation applications is growing steadily due to the aging population worldwide. Degradable implants have the advantage that the second surgery for implant removal is not required. Magnesium is one of the best candidates because it is biodegradable, physiologically compatible and even stimulates bone reconstruction. However, the high degradation rate of pure magnesium in human body fluids may prevent its wider application. In this study, Zinc (Zn) was added in magnesium (Mg) to improve its properties. The effects of five different weight percentage of Zinc (2%, 4%, 6%, 8%, 10%) were investigated. The microstructure and mechanical properties evolution of the alloys were characterized and evaluated using optical microscopy, Scanning Electron Microscope (SEM), tensile test and Vickers hardness test, while degradation behavior was examined using electrochemical corrosion test. The binary Mg-Zn cast alloy with 6 wt. % zinc content (labeled as Mg-6Zn) shows optimum mechanical strength with slowest degradation rate.
The Study Of Riverbed Change And Bed-load Transport In The Middle Segment Of The Batang Kuranji River
Authors: Junaidi  , Putra E D E , Junaidi A , Sunaryo  , Nurhamidah  
Published: September 2019

Abstract
Batang Kuranji is one of the biggest river in Padang City with catchment area of 202,7 km2. In the middle segment of this river have degraded significantly, especially in the downstream side of Gunung Nago Dam after the big flash flood in 2012. This also supported by the steep river slope of 0.017 and the activity of excavation of sand and gravel downstream of Gunung Nago Dam. Based on this, the authors are interested in examining the study of riverbed change and bed-load transport in the middle segment of the Batang Kuranji River, to determine the amount of sediment and changes in riverbed elevations that occur and analyse the location of proper building to reduce water damage. In conducting this research, researchers collected primary data, namely direct sampling in the field and secondary data from various relevant literature sources. In this study seven methods of calculating bed-load transport were used, including Meyer Peter Muller, Einstein, Einstein-Brown, Kalinske, Frijlink, Engelund and Hansens, and Van Rijn. Based on the results, there was a change in riverbed elevation, in the period of 2011 to 2013 there was a scour volume of 902,527 m3 greater than the sediment volume of 193,435 m3 where the sediment occurred was only 21.43% with the deepest scour 10.52 m. Kalinske sediment transport method has the closest value to manual calculation. The comparison between Kalinske method and manual calculation respectively; 0.056 m3/day and 0.187 m3/day in S12 sample; 0.312 m3/day and 0.554 m3/day in S23 sample; and 0.020 m3/day and 0.081 m3/day in S33.
Mathematical model and optimization of a thin-film thermoelectric generator
Authors: Newbrook Daniel W , Huang Ruomeng , Richards Stephen P , Sharma Shivank , Reid Gillian , Hector Andrew L , (Kees) de Groot C H 
Published: September 2019

Abstract
The thriving of the Internet of Things is set to increase the demand for low-power wireless sensing devices. Thin-film thermoelectric generators are ideal as a sustainable power source for Internet of Things devices as they allow for low maintenance and energy autonomy. This work presents a model to estimate the performance of a thin-film thermoelectric generator. Verified by finite-element method simulation, the results from the model show that increasing the interconnect electrical conductivity and reducing the device pitch increases the power density. The power density can also be increased by increasing the fill factor and reducing the thermal conductivity of the insulating materials. A new corrugated thin-film thermoelectric generator design is proposed in this work that allows for higher fill factors than conventional square designs where a limit on the minimum feature size is imposed, as is the case with photolithography.
CO2 and steam electrolysis using a microtubular solid oxide cell
Authors: Monzón Hernán , Laguna-Bercero Miguel A 
Published: September 2019

Abstract
Nickel-yttria stabilized zirconia (Ni-YSZ) supported tubes were fabricated by plastic extrusion molding (PEM). YSZ was used as the electrolyte and LSM-YSZ (lanthanum-strontium doped manganite) as the oxygen electrode. Both layers were deposited by dip coating and were then sintered at 1500 °C and 1150 °C, respectively. Coelectrolysis experiments were performed in these cells at 850 °C, using different fuel gas conditions varying the amount of steam, carbon dioxide, nitrogen and hydrogen. Area specific resistance (ASR) values ranged from 0.47 Ωcm2, when rich steam and CO2 flows are used, to 1.74 Ωcm2, when a diluted composition is used. Gas chromatography was used to examine the amount of H2 and CO in the output gas. The obtained results are consistent with the equilibrium of the water gas shift reaction. For all the different analysed conditions, faradaic efficiency was found to be close to 100%. This experiment confirmed that there is no electronic conduction taking place through the YSZ electrolyte. The threshold for electronic conduction in the diluted feeding conditions (Poor H2O and CO2) for these particular YSZ-based cell was found at voltages of about 1.65 V.