bluuebunny/crossref_metadata_2025_split huggingface dataset:
The proposed guest verification information system design for the residential complexes
Authors: Heryanto D , Fatimah D D S , Supriatna A D , Setiawan R 
Published: March 2021

Abstract
This study discusses the proposed information system design on how to verify guests in a housing complex that is quite dense and numerous, making it easier for environmental security officers to find and match guests and residents of the intended house. The purpose of this research is not only to improve the safety of the environment but also to find out the correct information from guests by verifying guest’s names to homeowners through a system designed. The method used in this study is the System Development Life Cycle (SDLC), which is a pattern for developing software systems consisting of the planning, analysis, design, implementation, testing, and management phases that form a workflow for planning and controlling design information Systems. The results of this study are prototype applications for guest verification in improving environmental safety in residential complexes.
Knowledge based information system for detecting early eye diseases
Authors: Sumarno S , Rosid M A , Irawan A 
Published: March 2021

Abstract
The eyes are very important senses in human life. If the eyes experience interference, it will be fatal to human life. Although each type of eye disease has its own specific characteristics and symptoms, early detection with a deeper recognition of eye disease symptoms should be done. Knowledge-based information systems are systems that attempt to convert human knowledge into computers so that computers can solve problems as is usually done by experts. produce conclusions or goals. The aim of this study is to design applications for early detection of fourteen types of eye diseases. This detection uses a knowledge-based system that uses the Forward Chaining method. This study produced an output in the form of the possibility of the disease the user suffered based on fifty-three selected symptoms. This system indicates how much confidence the user has in the symptoms of possible eye diseases.
Early warning model for financial distress using Artificial Neural Network
Authors: Alamsyah A , Kristanti N , Kristanti F T 
Published: March 2021

Abstract
Financial investment has become a trend in Indonesia with significant increase of active investors since 2015. Before making an investment, the investors need a comprehensive analysis to reduce the chances of failure that result in financial distress, the same apply towards companies in order to organize its financial strategies. Financial distress indicated by losing its value, ineffective production, cash flow problems or high financial leverage value. These conditions threaten the companies and the investors who face significant financial loss. The purpose of this research is to construct early warning model of financial distress, by examining the phenomenon of 90 companies in Indonesia, from 2015 to 2018 listed on Indonesia Stock Exchange (IDX). We apply Artificial Neural Network (ANN) backpropagation methodology using financial indicators such as profitability, liquidity, and solvability as the inputs. We divide the ANN model into time categories that is t-2, t-3, and t-4. In constructing ANN model, we configure four types of splitting training and testing data. The results show that ANN backpropagation model with 30 neurons, 90% training data and 10% testing data in category t-4 works well an accuracy 95.6% for financial distress prediction in Indonesia.
Design of social media-based information systems for higher education alumni
Authors: Yunanto P W , Nugraheni M , Handayani D , Wicaksono R 
Published: March 2021

Abstract
This study aims to produce information systems design and alumni data of Universitas Negeri Jakarta (UNJ) based on social media that can be accessed anywhere, facilitate the processing of alumni data, store alumni data and be able to convey information to alumni. This research emphasizes the development of information system designs whose output is user requirements and use case diagrams that can be implemented into social media-based information systems. The method used to formulate user requirements is through survey techniques and interviews with several alumni and relevant stakeholders, then the data obtained are analyzed qualitatively to be synthesized into the final user requirements. From the results of the study it can be concluded that the alumni information system is considered to be very effective in attracting alumni who have been scattered. The habit of Indonesian people who often use social media to publicize their activities unconsciously has provided information about themselves to the wider community, which can be used as a database that can be used for the benefit of the campus.
Computer Based Test (CBT) using Moodle-based High Order Thinking Skills in network design subjects
Authors: Sujatmiko B , Wibawa S C , Dermawan D A , Ongge H A 
Published: March 2021

Abstract
This study aims to determine the description of the process of making CBT-based question instruments and the level of valid instrument tests. The procedure developed in research is Research and Development (R&D) with a Moodle-based web system. The results of the test instrument validation for each number with an average at intervals of 84.2 to 100, the results of CBT based Moodle validation have an average of 90.65% which means it is very valid, the difficulty level of easy question categories with intervals of 0.82 to 0.92, the medium category with an interval of 0.50-0.67 and a difficult problem category with an interval of 0.21-0.28 the next distinguishing power has an interval of 0-0.75.
Technology measuring buildings’ quality for cultural heritage palaces in Cirebon, Indonesia
Authors: Agustina I H , Ekasari A M , Fardhani I , Hindersah H , Syahzidan A A 
Published: March 2021

Abstract
Kanoman Palace and Kacirebonan Palace located in Cirebon, Indonesia still show their existence until today. The form of the existence is shown through the appearance of the palace building, the king, and all the activities. Although both palaces are similarly a palace space, but there are some differences on the quality of the buildings. The differences are considered as the initial stage of cultural heritage building conservation. Palace or keraton is an initial formation of a city space. The structure of the palace space shows the development of civilization and culture that is served as a knowledge. The aim of this study is to describe the quality of the material and the building of Kanoman Palace and Kacirebonan Palace. The approach method used is a comparative technique for the two palace buildings by collecting reference of conservation technology on materials in the building of cultural heritage that can be applied to the buildings of the palace. Furthermore, the quality of buildings is obtained from the results of fieldwork and research reports conducted previously. The results of this study can be found to take technological steps in the conservation of cultural heritage buildings in the Kanoman Palace and Kacirebonan Palace. The implication for the local government of the city of Cirebon is to help making strategic policies in the procurement of conservation technology for the palace buildings.
Casing design (temperature-base) of the K well in ‘NPY’ geothermal field-Indonesia
Authors: Pudyastuti K , Yufi N P , Djumantara M , Hamid A , Anugrahadi A , Ashadi A 
Published: March 2021

Abstract
This study explains the casing design for the K well in geothermal field, that involve high temperature of wellbore about 200 °C – 300 °C. In the wellbore, elevated temperature generates stress that occurs in the casing material, cause casing installed in the wellbore to expand and shrink, and ultimately failure at a certain temperature conditions point. This failure will change the production casing in length, as well as the well integrity. The casing design for geothermal well must consider high temperature first, because the thermal effect on the casing strength, resistance and burst, that cause the maximum joint strength of the casing decreases, and leads to the collapse of the well. This study concludes that the design of geothermal well casing configuration which is suitable for the K well are casing grade L80 for surface section, casing grade S95 for production section, and grade S95 for slotted liner section. which agreed with the design factors for the temperature maximum of plastic deformation i.e. 599.26 F, 667.6 F, and 852.36 F for respectively sections: surface, production, and liner depths. This study also gives a benefit, i.e. recommendation for the field similar characteristics with the K well – Indonesia. Pore and fracture or overburden pressure gradients, is a determinant in casing shoe depth selection, the depth where temperature variation, play role in decreasing the strength of casing material. It must be a major concern. Author suggest a reservoir geomechanics studies on pore and fracture pressures gradient on the reference geothermal well, may provide a comparison in casing depth selection based on resistivity logs analysis besides BPCD.
Inclination and azimuth evaluation point determinations in “YMN” Field “AMR-10” reservoir by using minimum of curvature method
Authors: Yamani A , Chusniyah D A , Hamid A 
Published: March 2021

Abstract
Oil is utilized diversely in the world; starting as cooking material, manufacture fuel, until gas for vehicles. To obtain oil reserve, a drilling from the surface to the reservoir is required. The kind drilling chosen in this research is a directional drilling where the drill bit is aimed several degrees towards targeted formation, which is not vertically located under the reservoir. The planning process of directional drilling includes drilling trajectory planning and BHA composition utilization planning during the process. To determine inclination point and azimuth in AMR-10 drilling trajectory was formed by using radius of curvature method, and compare its result with actual trajectory counted by using minimum of curvature method, by calculation vertical depth, build-up rate, radius, azimuth trajectory, dogleg value, ratio factor, north and east direction, and horizontal movement. Based on the calculation of reservoir trajectory planning of AMR-10 reservoir, the vertical depth value is at 6540.9 ft. and horizontal movement from drilling starting point is 2290.3 ft. with azimuth angle of 202.68°. Based on the calculation and survey data, we can see that an inclination of 1.76° was occurred at 149.2 ft.MD and azimuth angle of 206.6° at similar depth.
Synthesis of Ni-TiN/Si3N4 nanocomposite layers using the electrodeposition method
Authors: Nasbey H , Budi E , Kusumawati L , Indrasari W , Sugihartono I , Prayitno T B 
Published: March 2021

Abstract
In an effort to find the best technique for coating metals, the synthesis of the Ni-TiN/Si3N4 nanocomposite layers was carried out. The coating process is carried out using the electrodeposition method. In the electrodeposition process, tungsten carbide (WC) is used as the working electrode. The WC is immersed in the electrolytic solution and is electrified for 5 mA for 15 minutes. During the deposition process, the temperature of the solution is maintained at 35 °C using a hot disc. The crystal structure and phase changes formed in the WC are characterized using X-ray diffraction (XRD). The surface morphology of the layer is investigated by scanning electron microscopy (SEM). Based on the results of the characterization, the size of the Ni-TiN crystal is approximately 488.91 Å. The Si3N4 phase is not detected because it is amorphous. The thickness of the layer formed is approximately 805 nm. This simple technique can be used to produce nanocomposite coatings useful for protecting metals from corrosion.
Effect of Aluminium coating on the Ferro-Silica-Magnesium alloys’ hardness and corrosion rate
Authors: Susila A B , Delina M , Lucita L 
Published: March 2021

Abstract
This paper studied the effect of Aluminium coating on the Fe-Si-Mg alloys surface to its hardness and corrosion rate. The Fe-Si-Mg-Al was formed from Fe-Si-Mg Powder Alloy, which was coated by Aluminium (Al) with the composition of (0; 2.2; 6.0; 10.2) wt%. The mechanical alloying was applied to conduct a wet mixing with the ball mill in a shaker mill for two hours. The powder was then dried and compress under eight tons of pressure for three minutes. The sample was then sintered in a tabular furnace with a temperature of 1000C for two hours and 5C/minutes of heating rate. Furthermore, the natural cooling rate was applied to reach room temperature. The sample was examined in an XRD to analyze the phase and tested under a SEM-EDX to evaluate the morphological structure as well as its dispersion. The results showed that the hardness rise as the increment of Al. It is because of the oxidation of Fe, Si, and Al, which formed Fe2O3, SiO2, and Al2O3 filled out the gap. The development of Al decreased the corrosion rate. Al with the composition of (6.0 wt%) was the lowest corrosion -3 rate which the value of 1.013x10 mmpy.
Contemporary aesthetics of exposed bricks for buildings’ façade and interior
Authors: Nugraha L A , Murwonugroho W 
Published: March 2021

Abstract
Exposed bricks have been trending in architectural design for façade and interior. They are known to have good reputation as construction material for their high functionality and high artistic values. There is an increasing demand for buildings to appear aesthetically contemporary, rather than traditional. Some buildings have tried to utilize bricks but failed, making its aesthetic underwhelming. The purpose of this study is to find a creative strategy for arranging bricks. Design Thinking is the basis for this paper’s research methodology. According to Design Thinking, to maximize on certain ideas several stages are needed: 1) emphatise; 2) define; 3) ideate; 4) prototype; and 5) test. In results and discussion section, it is found that aesthetics in architecture are desirable values which please the eyes and the mind in the forms of shapes and expressions. Principles for bricks arrangement composition still refer to Nirmana, with its need for visual unconventionality. The study concludes that the alteration of bricks function no longer serves as dividers, supports, or beam barrier but have transformed to include connecting rooms and channeling limited beam to create aesthetic ray of light. The novelty borne from the creativity of designers will indicate how bricks will stand out or fade with time as the chosen material for Indonesian-themed construction.
Utilization of prilled fat on milk production and milk quality fed to lactating dairy cows
Authors: Sanidita S R , Retnani Y , Despal D 
Published: March 2021

Abstract
The objective was to determine the effects of supplemental prilled fat in lactating dairy cows’ diet on milk production and milk quality. There hasn’t been any novel information about the effect of different content of palmitic acid in the prilled fat. The study conducted for 49 days, consisted of 42 days of adaptation and 7 days of data collection. Sixteen mid-lactation multiparous Friesian Holstein cows were assigned in a completely randomized block design experiment of four dietary treatments and four groups. The treatments were: basal diet (T1), basal diet + 2% of prilled fat with 75% of palmitic acid (T2), basal diet + 2% of prilled fat with 85% of palmitic acid (T3), and basal diet + 2% of prilled fat with 95% of palmitic acid (T4). The basal diet that used containing approximately 60% forages and 40% grains. The total dry matter intake resulted highest in T2 (P<0.05) with an average 17.42 kg/head/day, whereas, the milk production was not affected. The milk quality-analysed were total solid (TS), %fat, %protein, %lactose and solid non-fat (SNF). The %fat resulted the best in T2 with average 4.22% (P<0.05), while there were not any significant differences in TS, %protein, %lactose and SNF.
Melting dynamics of Gold thin film: A Molecular Dynamics study
Authors: Fahdiran R , Handoko E , Sugihartono I , Budi S 
Published: March 2021

Abstract
We studied the melting dynamics of Gold in the form of thin film. The thin film thickness is 9.756 nm. The systems are heated from room temperature up to slightly above melting point, Tm = 1338 K. The evolution of the atoms in each system is followed using Molecular Dynamics (MD) scheme up to 20 ps. Thermodynamics analysis indicated that thin film is suppressed by the uniform heat while the temperature is increasing. Structural analysis compared with Common Neighbor Analysis (CNA) expressed the condition that melting conduction occurred at the end of simulation.
Synthesis of ZnO/FA composite for methylene blue decolorization
Authors: Hadisantoso E P , Ayu Z D , Listiani P , Setiadji S 
Published: March 2021

Abstract
In this research, a ZnO/FA composite was successfully synthesized for the photocatalytic treatment of methylene blue. ZnO was obtained from Zn-C battery waste by precipitation method. Zinc metal from battery waste was separated, cleaned, and dissolve in hydrochloric acid to get the ZnCl2 solution. After adding some base until pH = 10, white precipitation was formed. This precipitate was filtered out and calcinated at 400 °C for 4 hours to obtained ZnO. Fly Ash (FA) was obtained from coal combustion waste. Fly ash was cleaned and drying at 105 °C for 3 hours. Synthesis of ZnO/FA composite was synthesized by a solid dispersion method using acetone as a medium with a various composition of ZnO: FA = 20:80; 40:60; 60:40; 80,20 in percentage. The XRD data show that the ZnO/FA composite was successfully synthesized. The SEM photo’s show that different morphology where more ZnO in the composite, the FA particles will be increasingly encased with ZnO particles. Photocatalytic performance studies of ZnO/FA composites for decolorization of methylene blue were carried out in various compositions, exposure times, substrate concentrations, and mass composites. The optimum decolorization was found in 40:60 composition, 3 hours irradiation time, 5 ppm concentration of methylene blue, and 150 mg of photocatalyst mass.
Design of experiment in preliminary optimization study of bioethanol production from Chlorella pyrenoidosa
Authors: Aditiya H B , Mulyaningsih Y , Theofany H C , Pramiesta A D , Mulyaningsih Y 
Published: March 2021

Abstract
As an alternative, sustainable energy form to replace fossil gasoline, the interest in producing bioethanol is still advancing. This is critical especially when third generation bioethanol production is focused, in which the fast-growing green algae is exploited as the feedstock. While the bioethanol production route is principally consistent regardless of the feedstock type, implementing optimization in bioethanol production is advantageous to the production as it presents optimum conditions based on the set variables. This study reports the design of experiment in preliminary analysis of optimization study in bioethanol production from Chlorella pyrenoidosa. Four factors (feedstock loading; NaOH concentration; hydrolysis time; hydrolysis temperature) are selected to determine the main response of reducing sugar as the main desired component for fermentation stage. Using response surface methodology, the design of experiment consists of 29 experimental runs with linear model as the suggested model.
Component design of foldable helmet for motorcycle usage: Strength analysis under static loading
Authors: Denatra G C , Basri G F H , Anggoro M A , Triawan F 
Published: March 2021

Abstract
A helmet is used to protect the head of motorcycle rider especially when an accident happens by absorbing the impact/crash load. In Indonesia, wearing a helmet when riding a motorcycle is obligated by the constitution. Hence, in line with the quick growth of online motorbike and taxi service, carrying a personal helmet has become a common need. Yet, it becomes troublesome to carry and store the helmet due to its big size. This paper introduces a primary design idea of a foldable helmet for motorcycle rider by fulfilling the safety standard of SNI (Indonesian National Standard). The proposed helmet uses hinge components that allow the folding mechanism. Strength analysis of the hinge-pin lock system is discussed in this paper. From the result, it was confirmed that the foldable helmet could withstand a loading requirement of 3000 N at the joint system (hinge) as required by SNI. The proposed folding mechanism can reduce a helmet volume up to 50% smaller than the non-foldable one. Furthermore, this study is expected to give contribution to the engineering product design.
Influence of duration and fuel injection pressure on two stroke gasoline direct injection engine performance
Authors: Syaka D R B , Margono G , Tyasmadi A T , Dewantoro T 
Published: March 2021

Abstract
The 2-stroke gasoline engines produce high air pollution because there is fuel wasted directly into the exhaust during the scavenging process. Solution to overcome the problem of pollution and improve engine performance is changing the fuel system into a direct injection fuel system. This study aims to determine the performance characteristics (power and torque) of two stroke gasoline direct injection engine in variations in injection duration and fuel pressure entering the combustion chamber with fixed injection timing 85° before TDC. The timing of fuel injection is carried out by a solenoid valve which is regulated using a disc board mounted on a crankshaft and detected by infrared sensors. Variations in the degree of duration of injection testing are 45°, 55° and 65°, in variations of fuel pressure of 6 bars, 7 bars and 8 bars The tools used for data collection are pressure gauge to measure fuel pressure and a tachometer is used to measure engine speed and engine torque measured by Prony brake. The results of this study indicate that increasing the duration and fuel pressure will increase power but do not directly affect the increase in torque, both because there is a certain duration and pressure which results in maximum performance.
Effect current and distance nuggets of micro resistance spot welding on battery lithium and stainless steel SUS 304
Authors: Sifa A , Badruzzaman B , Dionisius F , Wrisaba E 
Published: March 2021

Abstract
Micro resistance spot welding is welding that is widely used in welding cylindrical battery 18650 because the process is easy. SUS 304 Stainless Steel with a thickness of 0.2 mm is used as a connection plate, and lap joint is a connection that is used in lithium batteries because to facilitate the welding process. This study purpose of knowing the effects of distance nugget and current. The method is simulation and experimental. The simulations result in maximum stress is 80310 N/mm2. The experimental method with parameters of current 14 A, 16 A, 18 A and the distance of the nugget are 12 mm, 8 mm, and 4 mm, measure the HAZ and the nugget from welding are using a digital microscope with a magnification of 100 times, and shear test with 100 N/min. Shear test results show variations in the nugget distance, and a maximum load of 112 N with a nugget distance of 4 mm and comparison with the results of statistical simulation, the widest HAZ area at 14 A has 1.8 mm, and the widest nugget area at 18 A has 0.08 mm.