bluuebunny/crossref_metadata_2025 huggingface dataset:
The making KIT micro scale electrolysis experiments using lithium batteries based on green chemistry
Authors: Ratnasari D , Irwansyah F S , Subarkah C Z
Published: December 2019

This research makes alternative learning media that aims to assist teachers or students in studying electrolysis. Micro-scale electrolysis KIT is made using research and development methods. The results showed that the stages of the manufacture of micro-scale electrolysis KIT includes the step of analysis, design, development, implementation, and evaluation has been well done. The results of the feasibility test of micro-scale electrolysis KIT were declared valid with an average value of r count of 0.91. This shows that the micro-scale electrolysis KIT media that is made has a quite enough interesting, economical and practical appearance. Media presented with guided inquiry stages can help students learn electrolysis material.
The development of chemistry students’ 21 century skills through a STEAM project on electrolyte and non-electrolyte solutions
Authors: Rahmawati Y , Agustin M A , Ridwan A , Erdawati E , Darwis D , Rafiuddin R
Published: December 2019

This paper portrays a study into the integration of a Science, Technology, Art, Engineering, and Mathematics (STEAM) project in chemistry learning of electrolyte non-electrolyte solutions for developing 21st-century skills. Thirty-two, year-10 students engaged in the study. The research employed qualitative methodology with multiple modes of data collection via semi-structured interviews; classroom observations, reflective journals, and documentation were guided by a 21st-century skills rubric. In addition, the project was assessed against the criteria of project development, STEAM integration, and product quality. Students designed an innovative project, integrating STEAM in developing and making a miniature LED by using the natural electrolyte solution sources, such as lemon, lime, apples, and salt water. Students created posters and video projects for presentation in a project exhibition. Students were able to integrate their knowledge from various fields to solve problems and create new innovations. The students used the 21st-century skills of collaboration, communication, critical thinking, creativity and innovation alongside technology as a tool for learning. The engaging learning environment encouraged students to develop their skills and chemistry conceptual understanding.
Student engagement in science learning through the integration of ethnopedagogy in wastewater treatment project
Authors: Rahmawati Y , Ridwan A , Mardiah A , Sandryani W , Mawarni P C , Setiawan A
Published: December 2019

This paper describes a study to engage science students in learning about environmental pollution through the integration of ethnopedology in a wastewater treatment project. The study involved 40 year 7 junior high school students in Jakarta. In developing indigenous knowledge was explored, and cultural practices in dealing with environmental pollution in five region of Jakarta, Bandung, East Java, Central Java, and Banten, were integrated into the study. A qualitative research method used reflective journals, interviews, and a science concept test to gather data. The results show that ethnopedagogy integration in science learning engaged students in understanding their culture and learning identity, and developed their problem solving, critical and creative thinking skills. Conceptual understanding of the science was developed throughout the learning experiences. In addition, students have developed their skills in communication and collaboration through completing the project. Students faced the challenge of shifting their identity from passive to active learners using meaningful and enjoyable learning experiences.
Degradation of methyl orange by photo assisted fenton reaction using Indonesian bauxite as catalyst
Authors: Rahman A , Purwanto A , Yusmaniar Y , Saputro A A , Prasetyanto E A
Published: December 2019

Photo fenton catalyst is an effective and environmentally friendly catalyst for degrade organic pollutants. Novel photo fenton catalyst was successfully prepared from Indonesia bauxite was used as a catalyst for degradation of methyl orange solution. This catalyst is more cheaper than Nafion-based catalyst and more greener than other synthesized catalysts. It is easily prepared from Indonesian natural resources. X-ray diffraction measurements provide structure and mineral composition of bauxite, while XRF provides information on the composition of Fe by 18% by weight of bauxite mass. The presence of large amounts of Fe in bauxite acts as a catalyst in the decomposition of metyl orange. Testing of photo fenton activity to decompose metyl orange showed that Indonesian bauxite had high catalytic activity, was able to decompose 99.4% metyl orange within 40 minutes on irradiation using an 9Watt UVC radiation source.
Synthesis and characterization of LTA zeolite from Kaolin Bangka
Authors: Rahman A , Purwanto A , Endah A , Handoko E , Kusrini E , Prasetyanto E A
Published: December 2019

The synthesis of LTA zeolite from kaolin Bangka using hydrothermal method at low temperatures has been reported. Kaolin was converted into metakaolin by calcinaton process at a temperature of 750 °C for 2 hours then hydrothermal subsequently process at 60°C for 5 hours in a NaOH 3M solution. Characterization by using XRD provides information on changes from the crystalline to amorphous phase in the conversion of kaolin to metakaolin to complete and the formation of LTA zeolite after hydrothermal. SEM provides information on morphological changes that are typical for Kaolin, metakaolin and zeolite LTA. From these characterizations, it can be concluded that successfully synthesized LTA zeolite from Kaolin Bangka with high crystallinity using a simple method.
A simple formulation of lip balm using carrot extract as a natural coloring agent
Authors: Anisa H , Sukmawardani Y , Windayani N
Published: December 2019

This study aims to determine the optimum combination of cera alba formulations in the manufacture of lip balm using carrot extracts as natural dyes corresponding to the SNI. The physical properties determined on the basis moisturizing lip wax. The method used is Research and Development. The study begins by macerating botanicals carrots with solvent n-hexane and concentrated by rotary evaporator. Furthermore, the manufacture of lip balms with various additions cera alba concentration which are 9%, 12.9%, and 16.4% and carrot extract concentration are 0.009%, 0.172% and 0.24%. To test the stability of lip balms, homogenity and organoleptic tests were carried out for 20 days at room temperature storage by observing changes in color, smell, and texture, pH test, rub test, and irritation test. The formulated lip balm is expected to be an alternative to be used as a moisturizer that is environmentally friendly and has minimal side effects compared to lipbalm currently on the market.
Analysis of X ray diffraction spectra of cholesteryl acrylate-Indium Tin Oxide nanoparticle composites
Authors: Afrizal A , Rahman A , Handoko E , Astuti E P , Jati L , Ismail M
Published: December 2019

Composites of cholesteryl acrylate with Indiun Tin Oxide (ITO) nanoparticle was made by UV curing technique at various the concentration of ITO nanoparticles. In this research using variation concentration of ITO nanoparticles. Polymer Cho-ITO nanoparticles have succeeded in becoming a composite. Pattern of X Ray Diffraction of Cholesteryl acrylate-Indium Tin Oxide nanoparticle (Cho-ITO) at ITO 10% w/w showed peak for Cholesteryl acrylate in 2θ at 2,6782°; 5,2275°; dan 15,8050° with value of dspacing (001) was 32,96 Å. For ITO in 2θ at 30,6244°; 35,5105°; 45,6814°; 51,0400°; dan 60,6473°. therefore pattern of XRD of Cho-ITO at ITO 20% w/w showed peak for cholesteryl acrylate in 2θ at 2,6372°; 5,2022°; dan 15,7867° that value of d spacing lattice (001) is 40,09 Å. For ITO in 2θ at 30,5685°; 35,4428°; 41,8550°; 50,9846°; 60,6252°. increasing value of d spacing for (001), that d spacing for cholesteryl acrylate 32,60 Å when added was by ITO 10% w/w dspacing increase untuil 32,96 Å. When added ITO 20% w/w value of d spacing until 40,09 Å.
Isolation, characterization, and antibacterial assay of friedelin from Garcinia latissima Miq. leaves
Authors: Ambarwati N S S , Elya B , Malik A , Hanafi M , Omar H
Published: December 2019

The purpose of this study is to isolate G. latissima Miq. leaves ethyl acetate extract and to understand its activity against B. subtilis. The isolation was performed by open column chromatography, recrystallization, preparative thin layer chromatography and the isolate antibacterial assay by microdilution method. Compound characterization using spectroscopy. The isolated compound was white crystal, soluble in chloroform and insoluble in n-hexane, ethyl acetate. The melting point of the isolated compound was 262-264oC. IR spectrum showed strong signals for C-H stretching of methyl groups and carbonyl oxygen (C=O). The based on NMR data, the chemical shifts of chemical compounds from the isolate was compared with the literature showed that the isolate was friedelin. The MIC of friedelin against B. subtilis was 2,500 ppm.
Detection of Salmonella typhimurium and Escherichia coli in artificially inoculated Milk sample using Real Time PCR method
Authors: Nurjayadi M , Efrianti U R , Azizah N , Kurniadewi F , Saamia V , Wiranatha I M , Nastassya L
Published: December 2019

Salmonella typhimurium and Escherichia coli are the bacteria the most common cause of food-borne illness. The aim of the study is to detection S. typhimurium and E. coli by Real Time PCR from milk samples. Gene targeted of S. typhimurium is pef and the E. coli is fimC. Confirmation test of all primers in contaminated milk with S. typhimurium and E. coli gave different cycle threshold (Ct) value in range 12-13. The detection limit for S. typhimurium with primer pef was in 7, 92 pg/μL and detection limit for E. coli with primer fimC in 7, 12 pg/μL. Each primer produces distinctive melting peak. The melting peak curve S. typhimurium with pef primer is 84,17°C and the melting peak curve E. coli with fimC primer is 79,97°C Based on the result of this study; all the primers were successfully applied in detecting S. typhimurium and E. coli bacteria in the milk sample quickly, sensitive and specific as well as can determine the number of bacteria accurately.
Production of stringbean (Phaseolus vulgaris L.) using phosphate solubizing bacteria and natural phosphate fertilizer on acid soil
Authors: Hidayat C , Pratama M A , Hasani S , Sudrajat A
Published: December 2019

Acid soil can be used for land extensification, but need input technology in order its for maximum crop growth support. The aim of the reserach was to know the effect of Phosphate Solubizing Bacteria and Natural Phosphat Fertilizer on the production of Stringbean (Phaseolus vulgaris L.). A field trial at Universitas Padjadjaran research station 768 m above sea level had been carried out using randomized block design two factors with factorial pattern and three replications. The first factor was concentration of Phosphate Solubilizing Bacteria (0 ml, 10 ml, 20 ml, 30 ml), while the second factor was the type of natural phosphate fertilizer (120 g of guano polybag−1, 120 g of rock phosphate polybag−1 and 120 g of swimmer crab flour polybag−1). The results showed there was no interaction effect of Phosphate Solubizing Bacteria and Natural Phosphate Fertilizer on harvest index. The type of natural phosphate fertilizer has an independent effect on leaf area and pod dry weight but the value is still below its potential production.
Microemulgel formulation of Kepok banana peel extract (Musa paradisiaca L) as an antioxidant
Authors: Sriarumtias F F , Najihudin A , Putri I R , Akmal A , Hamdani S
Published: December 2019

The idea to utilize banana peel which had only become organic waste so far, led the researchers to conduct this study. The purpose of this study was to utilizeKepokbanana peel into microemulgel which had stable characteristic and antioxidant activity. The peel ofKepokbanana was extracted using maceration method with methanol solvent. The resulting extracts were then tested for antioxidant activity with the DPPH (1,1-diphenyl-2-pikrilhidrazil) method, obtained IC50 values of 659,544 ppm. Concentration extracts in microemulgel formulation were 1X IC50 (F1), 2X IC50 (F2), 3X IC50 (F3) and positive controls containing vitamin C (F4). All formulas were evaluated including organoleptic, pH, viscosity, centrifugation, dispersion, irritation test and freeze and thaw. The evaluation results showed that only formula F3 changed organoleptically and decreased viscosity. The testing of antioxidant activity microemulgel containing banana peel extract revealed that F2 was the best formula on pharmaceutical requirements with the IC50 was 638 ppm and had good stability. For all formulas after an irritation test, no erythema or udema was found. Therefore, the irritation index was zero. The benefits of this study could provide an alternative source of phytocosmetic preparations as antioxidants and utilize organic waste into something useful.
Antioxidant activity of Indonesian water spinach and land spinach (Ipomoea aquatica): A comparative study
Authors: Mariani R , Perdana F , Fadhlillah F M , Qowiyyah A , Triyana H
Published: December 2019

Ipomoea aquatica is Convolvulaceae plant that is widely consumed in Southeast Asia as a vegetable. The plant contains various bioactive components, e.g. phenols and flavonoids. Water spinach and land spinach are two varieties of Ipomoea aquatica in Indonesia. Both extracts have been analyzed for their free radical scavenging activity using DPPH (2,2-diphenyl-1-picrylhidrazyl). Total phenol was measured using Folin Ciocalteu and the total flavonoid was measured using AlCl3. Both extracts also have been analyzed by TLC (Thin layer chromatography) using DPPH and AlCl3 spray reagents. Water spinach has higher antioxidant activity than land spinach and there was a correlation between antioxidant activity and total phenol/flavonoid content. Based on TLC results, it was supposed that the compound responsible for antioxidant activities in water spinach and land spinach was flavonoid.
Characterization of nano ceramic composite of Mullite-Magnesia-Yttria stabilized Zirconia system
Authors: Hakim B L , Subawi H , Mauhuddin Y , Aulawi H
Published: December 2019

The oxide and nano ceramic system of Mullite-Magnesia-Yttria Stabilized Zirconia were studied. Some fracture toughness models were examined to evaluate the crack length parameter to comply with Palmqvist and median crack criteria at c/a ratio equal to 3.0. The mullite crystal structure was observed using SEM and looks likely needle, whereas 3YSZ crystal appears smoother. Through EDS analysis, it detected the oxides in Mullite system, i.e., Al2O3, and SiO2. With a similar method, some oxides observed in the Mullite-Magnesia-3YSZ system such as MgO, Al2O3, SiO2, Y2O3, and ZrO2. With XRD analysis, nano MMZ system shows containing Al6Si2O13, Corundum (Al2O3), Zirconia (ZrO2), and Quartz (SiO2). Fracture toughness KIC of the ceramic composite of nano mullite-magnesia-zirconia complies with Palmqvist and median crack criteria. Nano ceramic particle shows a higher value of hardness and fracture toughness while compared with oxide ceramic system.
Effects of seeding temperature and growing time on the nanostructural characteristics of ZnO nanorods thin films prepared by chemical bath deposition
Authors: Liyana G R , Yuwono A H
Published: December 2019

ZnO nanorods have been attracting much interest of researchers owing to their unique properties and extensive potential for various applications including light-emitting diode, dye-sensitized solar cells, and field-effect transistor. For being applied on those strategic applications, some basic nanostructural characteristics of ZnO nanorods such as crystallite size and the band gap energy are essential since they play important role in the device performance. In this study, the effect of seeding temperature and growing time on the nanostructure characteristics of ZnO nanorods were investigated. The seed solutions were initially prepared at the temperature of 0, 30, and 60°C for 1 hour by using zinc nitrate tetrahydrate and hexamethylenetetramine as precursors. The ZnO seed layers were subsequently deposited onto ITO glass substrates by spin coating technique before the chemical bath deposition (CBD) growth at temperature of 90°C for three different growth times (3, 4, and 5 hours). The synthesized ZnO nanorods were characterized by field-emission scanning electron microscopy, x-ray diffraction, and ultraviolet-visible spectrophotometry. The results showed that with the increase in seeding temperature from 0 to 60°C, the crystallite size decreased from 61.83 to 51.54 nm, while the band gap energy increased from 3.36 to 3.57 eV, respectively. On the other hand, with increase of growing time during CBD, the crystallite size was increased from 51.54 to 75.17 nm, and the band gap energy was consequently found to decrease from 3,57 to 3,46 eV. Considering the observed results above, the low seeding solution temperature and CBD growth time control are promising to optimize various applications performance required to have remarkably high crystallinity and low band gap energy.
Fabrication of Titanium Dioxide-reduced Graphene Oxide (TiO2/rGO) nanocomposites as the Photoanode in Dye Sensitized Solar Cells
Authors: Daulay S , Madsuha A F , Rosa E S , Yuwono A H
Published: December 2019

One of the photovoltaic cells generation promising for low-cost fabrication is dye-sensitized solar cell (DSSC). However, it has a drawback─low efficiency because of electron recombination occurrence and low transparency of photoanode. Graphene-based materials show the potential to overcome this problem. In this work, we have investigated the integration of reduced graphene oxide (rGO) into the titanium dioxide (TiO2) photoanode in DSSC. A simple Hummer’s method has been used to synthesize graphene oxide flakes. The nanocomposite of rGO/TiO2 has been formed by varying the percentage of rGO between 1% and 5%. The result shows that the percentage of rGO in nanocomposite affected device performance. The efficiency decreases along with the increase in rGO. The best result was obtained with 2 wt% addition of rGO into TiO2 photoanode that resulted in 0.9 % efficiency.
Evaluation of drilling hydraulic calculation to the ability of bottom hole cleaning
Authors: Widiyatni H , Rizkina A , Dirastri W I
Published: December 2019

In drilling operation there are two important matters that must be considered, which are the pumps and drilling fluid rheology that are influencing hydraulics drilling system. The major function of drilling fluid is to lift the drill cutting to the surface and still maintain the drilling hole to avoid an encounter. Evaluation of hydraulics drilling for bottom hole cleaning will count the parameter success which influence in removal of cutting to the surface for bottom hole cleaning and optimization drilling calculation hydraulics. The velocity of drilling fluid in annular, the flow that is formed and the ability of bottom hole cleaning are highly influenced by specifications of mud pump as a resource power for mud to flow that also will determine how the value of flow rate can be circulated. Mud rheology, PV, YP and MW will influence the performance of mud to carry cutting on drilling operation. The penetration to formation rock will make the broken bits of solid material removed from a borehole drilled by bit and resulting the drill cuttings. These cuttings could settle on the bottom of borehole so the main purpose of drilling fluid is to carry the cuttings to the surface, besides the drilling fluid also protecting borehole condition from any drilling problems. This evaluation is using Power Law Model for calculate pressure losses, drilling hydraulic optimization and also observe the parameter of Cutting Transport Ratio (Ft), Cutting Concentration (Ca), Cutting Carrying Index (CCI) and Particle Bed Index (PBI). The optimization results from Bit Hydraulic Horse Power (BHHP) method produce significant changes which are percentage horse power delivered to bit (%HHP) increasing to 53.17 – 54.79 % from actual condition which only ranges 5 – 51 %. Q optimum is very influential on the value of bit hydraulic horse power (BHHP) and surface horse power (HPS) that provide more optimized power to pump the mud with minimize the effect of pressure loss.
Melting of gold nanoparticle: study on structural evolution
Authors: Fahdiran R , Handoko E , Sugihartono I , Sunaryo S , Budi E , Susila A B , Budi S
Published: December 2019

We investigate the structural evolution on melting of Gold nanoparticle due to heat treatment from room temperature up to slightly above melting point. The evolution is followed using Molecular Dynamics (MD) simulation. Structure factor and pair distribution function calculation indicated that the system is melted at the end of simulation. Common Neighbour Analysis (CNA) method shows the local lattice structure transformation confirming phase transition.
Effect of low nickel substitution on structure, morphology, and electrical transport of La0.7Sr0.2Ba0.1Mn1-xNixO3(x=0.02 and 0.05)
Authors: Munazat D R , Kurniawan B , Imaddudin A
Published: December 2019

The effect of low nickel substitution at Mn-site on structure, microstructure and electrical transport properties of La0.7Sr0.2Ba0.1Mn1-xNixO3(x= 0.02 and 0.05) were investigated. Samples were prepared by sol-gel method. From Rietveld refinement result, crystal structure of both samples were found to be Rhombohedral with R-3c (167) space group. Low nickel substitution at Mn-site shows that the Mn-O-Mn bond angle decreases and the Mn-O bond length increase which can link to Jahn-Teller distortion and double exchange. Scanning electron microscope (SEM) result reveals that nickel substitution leads to smaller grain size. Temperature-dependent resistivityρ(T) has been measured at 15-285 K with zero field cooling. The experimental resistivity data were fitted by Percolation model. Percolation model can describe the electrical behavior of both samples based on electron-electron, electron-magnon, and electron-phonon scattering, and Kondo-like spin-dependent scattering at low temperature and adiabatic small polaron hopping at high temperature. It was found that nickel substitution decreases the metal-insulator transition temperature (TM-I) from around 304 to 272 K, and Curie temperature (Tc) from around 330 to 310 K.
Influence of sintering temperature on the structure and electrical transport properties of La0.7Ba0.1Sr0.2Mn0.85Cu0.15O3manganites
Authors: Razaq D S , Kurniawan B , Imaduddin A
Published: December 2019

A systematic study of the La0.7Ba0.1Sr0.2Mn0.85Cu0.15O3manganites have been conducted, mainly to understand the influence of sintering temperature on structure, microstructure, and electrical transport properties in the materials. Polycrystalline sample of La0.7Ba0.1Sr0.2Mn0.85Cu0.15O3were prepared using sol-gel method and sintered at 1100 °C and 1200 °C. X-ray diffraction result shows that sintering temperature does not affect the crystal structure of the materials which remain rhombohedral with R-3c space group. a more detailed examination shows that sintering temperature change the unit cell volume,  bond length, and  bond angle of the samples. The electrical resistivity decreases followed by the decrease in the grain size with the increase in sintering temperature. Analysis using theoretical model shows that both samples can be well explained using percolation model. Fitting result suggests that the transport properties of the materials at low temperature were governed by the scattering and interaction between electron, phonon, and magnon. At high temperature, the electrical transport of the samples was governed by the hopping of polarons.
Source rocks study and thermal modelling in Salawati basin, West Papua
Authors: Muhartanto A , Hamdani A H , Safrizal S , Fauzielly L , Triwerdhana A
Published: December 2019

Hydrocarbon in Salawati Basin is generated from Tertiary and Pre-Tertiary source rock. Several source rocks studies have been conducted, such as in Sirga, Kais and Klasafet Formation. Lack of knowledge in characteristics and thermal modelling source rock in Sirga and Pre-Faumai Formation, also curiosity to observe basin reverse polarity occurrence is intriguing to be researched further. The purposes of this research are to know: a.) Sirga and Pre-Faumai Formation source rock characteristics to generate hydrocarbon in Salawati Basin; b.) Maturity values based on %Ro, Tmax and 1D basin modelling. Research methodology was carried out using petroleum geochemistry analysis, including: TOC, Rock Eval Pyrolysis, kerogen typing, vitrinite reflectance from 9 cutting samples. Based on TOC parameter, organic-rich materials in both formations show good to very good quantity. On the other hand, PY parameter shows fair to good potency quality as source rock to generate hydrocarbon. Kerogen type composition dominated NFA which indicates oxidizing marine or lacustrine depositional environment. Sirga and Pre-Faumai Formation show low level maturity based on %Ro and Tmax. On the contrary, based on 1D basin modelling maturity of the source rock on Warir-1X well and WIR-1A (outside research area) show higher level maturity (early to mid-mature) since Middle Pliocene and progressed into late maturity stage on oil generation since Early Pleistocene. Basin polarity reversal occurred since Pliocene and changed basin configuration i.e. depocenter from on southern area becoming on northern area. Sirga and the Pre-Faumai Formation are believed to be the two formations as hydrocarbon generating source rocks in the Salawati Basin based on geochemical characteristics analysis. Maturity based on% Ro shows the level of immature to peak mature.
Echo hiding method for video file message security
Authors: Rahmad C , Muhiqqin I , Patma T S , Ariyanto R , Muna N
Published: December 2019

Sending secret message need an algorithm that can protect message to receiver without knowing by other and keep the originality of message. Previous research, encoding secret message in video inserted in frame while audio secret message inserted in bit audio. it makes it easier for someone to detect the presence of a message. In this paper, try to encode the secret message at video file to encode in audio. Audio separated from video in order to encode secret message in audio. Echo Hiding method used in encode secret message to audio process. Testing use Bit Error Rate (BER) method to analysis modification in audio and Normalized Correlation (NC) analysis authentic the secret message. Based on the experiment, the results obtained were NC values (0.98-1) and BER values (0-3.12). based on the results obtained by the method we can insert messages better than the previous method with the addition of noise elimination in audio.
Iris feature extraction using Gray Level Co-occurrence Matrix and Gabor Kernel filter its impact on iris Huffman compression image
Authors: Asmara R A , Yusron R D R , Rahutomo F , Ariyanto R , Aji D K P , Choirina P
Published: December 2019

Algorithms developed to identify people with iris image data have been tested in many field and laboratory experiment. This paper analysis some a parameters of iris image used to recognize human. Iris recognition system, which is applied based on segmentation, normalization, encoding, and matching is also describe in this paper. Circle Hough Transform segmentation module used to find the inner and outer boundaries of the iris. The experiment was carried out using CASIA v1 iris database with grayscale images. Shape, intensity, and location information for localizing the pupil or iris and normalizing the iris area a used iris segmentation by unwrapping circular area into a rectangular area. Normalized area will be used to extract the features using Gray Level Co-occurrence Matrix (GLCM) and Gabor filter, the feature compared the recognition accuracy using Support Vector Machines (SVM) and Naive Bayes classifiers. GLCM feature test results achieved 95.24% SVM classification accuracy, whereas using achieved 85.71% Naive Bayes. Gabor feature test results achieved 95.24% SVM classification accuracy, whereas using achieved 95.23% Naive Bayes. The classification process based on GLCM and Gabor features show that the SVM method have to highest recognition accuracy compare to Naive Bayes classifier.
The augmented reality application for simulating electromotive force concept
Authors: Bakri F , Sumardani D , Muliyati D
Published: December 2019

The discussion of the concept of electromotive force often leads to misconceptions. Unity program can produce 3-dimensional media from 2-dimensional media. In this article, we will describe the form of electromotive force simulation that is displayed with augmented reality technology. Development of electromotive force simulation using 4D development model (define, design, develop, and disseminate). The application of augmented reality technology can visualize the three-dimensional form of abstract electromotive force processes into reality. The design process is based on pedagogical content knowledge. The electromotive force display can simulate the impact of changes in the number of turns, magnetic fields, and time of playback of the generator against the value of electromotive force. The simulation has succeeded in providing an interesting description of the ratio of variables to the magnitude of the force of electricity produced in the generator. Display simulation electromotive force with augmented reality technology has met the principle of technological pedagogical content knowledge (TPACK).
Development of online learning design
Authors: Rahadian D , Bariyah S H , Nasrullah I , Purwanti Y , Imania K
Published: December 2019

Development research aims to produce online learning designs to enhance the active role of students in utilizing e-learning to support the learning process in project management courses. The research method used in the development of online learning design is the ADDIE Research model starting with conducting analysis and design to define the needs of students in online learning based on learning outcomes in courses, then developing with LMS Moodle, and implemented in IT Project Management courses. Learning design that has been developed in e-learning to support the learning process of IT project management is then validated by several experts, namely software development experts, and learning experts so as to produce a blended learning model. The results showed that online learning design needs were very high to support student activity in using e-learning and received positive responses from students in the use of e-learning to support face-to-face learning in the classroom.
Modified union feature selection method on English translation of hadith text clustering
Authors: Huda A F , Priatna N , Safitri Q U , Darmalaksana W
Published: December 2019

The high feature space (dimension) is one of the main issues to be considered in the text clustering process. Therefore, various dimensional reduction methods have been introduced for selecting informative sub feature. Each method uses a different strategy to select sub feature, and the results are different even if using the same data set. Typically, union methods and intersection methods are used to combine selected sub feature with different reduction methods. The union method selects all feature and intersection only selects the general feature under consideration. Thus, the union approach causes an increase in feature dimensions and the intersection approach causes the loss of some important feature. Therefore, in order to take advantage of a method and reduce its weaknesses, this research proposes new approach, which are called modified union. This approach applies the union methods to select top ranking feature and applies intersection methods to the rest of the feature. In this case, feature selection uses the Term Variance (TV) and Document Frequency (DF) methods to calculate the relevance value of each feature. The effectiveness of the proposed method is tested on the data set of Hadith Shahih Bukhary. The results show that the proposed method improves clustering accuracy over other methods with DB index is 2.7.
Analytical network process method for badminton athlete’s scholarship recommendations
Authors: Andrian R , Fuadi R S , Fahrudin R , Rahman A , Wildanuddin M , Wahana A
Published: December 2019

Pathways admissions line independent achievement sports especially badminton was held in UIN Sunan Gunung Djati Bandung aimed to help athletes who want to proceed to a higher level and change the paradigm of athletes on the importance of continuing education to a higher level in accordance with the specified criteria. The process of input in determining the acceptance still uses old system by Microsoft Excel that sometimes causes confusion. To help determine an independent candidate of badminton accomplishment line, it is then required a decision support system. The Method that can be used for deciding support system by using Analytical Network Process (ANP). Using this method, the calculation was done by doing a comparison between the criteria and alternatives then produce supermatrics, then do the weighting process will determine the athletes who deserve to UIN Sunan Gunung Djati in Bandung. This research used 9 prospective registrants (alternate) as a sample after doing comparison calculation manually and the application of the method itself then acquired relative error of 0%. So the system has been made is said to be worth used relative error less than 50%.
Vocational Education Enterprise Architecture Framework (VEEAF) for supporting business processes on vocational high school
Authors: Adhi B P , Widodo W , Ajie H
Published: December 2019

Technology supports organizational business processes. Advanced and well-established organizations have a variety of activities that are well managed with a framework or architecture. Company architecture is an illustration of how business processes can be managed with the support of various technologies in their environment. The purpose of this study is to develop a framework using enterprise architecture in Vocational High Schools which is an organization in the field of education that needs to develop and adapt to the times. Many activities and business processes in the education sector began to shift from manuals to information technology-based. Research methods developed using the Federal Enterprise Architecture Framework (FEAF) method but are limited to level IV where this level focuses on modeling produced by each cell in the matrix, and the matrix used is in the first row, namely the appearance of planning objectively or coverage. The perspective planner explains the views or estimates of the scope of the system, whether the resulting system will be valuable and how the system will operate. The results of this study are matrix perspective and vocational enterprise education architecture (VEEAF) model in the scope of perspective: finance and assets, registration, cooperation with industry, career center and alumni, academic, Professional Certification Institutions (LSP).
Improving second grade elementary students’ writing and storytelling skills through digital literacy
Authors: Suwarni A Z J , Rahman R , Iswara P D
Published: December 2019

The aims of this study was to improve writing and storytelling skills of second grade elementary school students. Through digital literacy, students can have a meaningful experience when they learn to make and tell a story they have made. Students will be able to explore their competences while using a lot of audiovisual media for finishing writing and storytelling assignment. This research conducted with a qualitative research design by using observation and students’ assessment as research instruments. Based on the findings, a conclusion can be drawn that digital literacy is able to improving second grade students’ writing and storytelling skills
The development 3-D augmented reality animation on radioactive concept
Authors: Permana H , Kencana H P , Bakri F , Muliyati D
Published: December 2019

Augmented Reality is a technology that can provide positive perceptions of lessons, improve learning experiences, and improve learning achievement. It visualizes the phenomenon obtained by the results of laboratory research. This research was to design and develop the marker of radioactive concepts. The stages consist of determine the instructional needs and goals, develop the markers, and quality review. We generate two markers for this concept: radioactive light penetration and radioactive light beam by electric field. The markers were developed based upon the identification of instructional needs and expected to assist in the achievement of the instructional objectives. The results of the development show that AR animation markers on the radioactive concept can be read and have maximum readability of 25 cm.
Relationship between enterprise architectures planning and information system
Authors: Soegoto E S , Fauzi S I , Valentina T
Published: December 2019

The main purpose of this research is to define the benefits of architectural business planning and its relationship with the development of information systems. The method used in this research was a descriptive method; descriptive mode was chosen to present accurate subjective or objective views from the situation related. The results of this study explain to us that there is a positive relationship between enterprise architectures planning and information system, to produce a blueprint, so that we can used as a basic foundation for the development of information system in architecture planning. From this research we obtained by discussing and observing those journals that relate enterprise architecture planning with information systems. The conclusion of this study is that enterprise architecture planning is very useful for information systems, especially in terms of developing information systems in the future, to make integrate from some decision-making.
Digital startup implementation in e-learning
Authors: Heryandi A , Dianti V R , Yusup M
Published: December 2019

The purpose of this study describes the analysis of the development of digital startup in the field of education, as well as the advantages of digital startups in the Learning Management System (LMS). This case study uses descriptive method, in order to conduct a separate search for groupings related to several variables studied. At the end of this research is to measure which digitally computer learning startup. By entering a digital startup, the learning process is done by using video learning, practice questions and discussions, and also a learning module that can be downloaded as a material for learning, a learning process that can be used effectively, can help time and place of learning.
Designing MOOCS with Virtual Microscopic Simulation (VMS) for increasing of student’s levels of understanding
Authors: Wibowo F C , Iswanto B H
Published: December 2019

The purpose of this research is effect of MOOCS with Virtual Microscopic Simulation (VMS) for students’ levels of understanding. The research method used is the Embedded Experiment Design with the research subjects as many as 45 high school students in one campus in Banten, Indonesia. The results showed that the Level of Comprehensive Understanding (CU) was 76.67%, Level of Understanding of Partial Understanding (PU) was 15.56%, and Level of Understanding Misunderstanding (MS) was 5.56%, Level of Understanding Does Not Understand (NU) of 2.22% and the lowest level of understanding at the 0% level of No Answered (NA). It was concluded that the average level of understanding experienced a significant increase with learning through MOOCS with VMS on phase transition.
Analysis of classification algorithm in pension types
Authors: Fitrani A S , Astutik I R I , Rosid M A
Published: December 2019

The concept of data mining in its implementation is used in handling and analysing data in large capacity. Steps to extract information and to gain knowledge in supporting decision making. Data mining, in its implementation can be used in various sectors of data analysis, namely about the condition of the type of pension. The purpose of this study is to provide information, where a civil servant within the retirement limit is taken normally or earlier. The technique of using the classification method, with the decision tree C4.5 (J48), Naïve Bayes and k Nearest Neighbour algorithm. Presentation of assets of 1,316 pension data in 2012 and 2013 from Bukopin Bank customers, which are divided into training data by 65% and data testing by 35%. From the testing of three algorithms, the highest classification was produced, namely Naïve Bayes with 91%. The results of the three classifications indicate the quality of attribute determination can affect the results. And the predictive level of the three algorithms shows different results. For classification techniques with better results, improvements are needed to determine attributes and develop existing datasets.
Deep learning with encoder-decoder architecture for exchange currency rates model predictions
Authors: Andrijasa M F
Published: December 2019

Exchange currency rate becomes one of the most important things on country economic growth. In some countries, the rate may affect seriously to economic growth and political stability. Governments need to have some actions in order to stabilize the rate. Knowing the pattern of exchange currency rate is a mandatory by governments for determining their future policies or as consideration in future decision-making. Therefore, government needs an analysis tool for modelling the rate prediction. Our previous study emerged that using deep learning method with encoder-decoder architecture has succeeded to model the rate prediction with teacher forcing and give only a one-step prediction. In this study, the authors aim to predict the pattern of exchange rate using the previous method with zero input to decoder to obtain multiple time steps prediction. After training and testing over 4,344 daily data series of IDR to USD exchange currency rate over 17 years taken from Bank Indonesia official website, the result found that the method still showed an interesting model to predict the next 40 sequence data series of exchange rate. In conclusion, the proposed method can be utilized to tackle the others prediction problem and the resulted model can be applied as an analysis tool by government for predicting their rate for the coming months or years.
The TIGER society framework in the scope of information technology infrastructure
Authors: Cahyana R , Kurniadi D , Pariyatin Y , Susetyaningsih A
Published: December 2019

The TIGER society focuses its economic development on tourism industries, which is supported by the government and stand on the development of competency and character based on local wisdom through education and religion. The TIGER society seeks to increase tourist satisfaction by optimizing relations between the five TIGER fields (tourism, industry, government, education, and religious) with information technology support. The purpose of this research is to create a TIGER society framework for the preliminary investigation of IT infrastructure needs in all TIGER fields. This study uses the literature survey method to find the theoretical basis for framework construction and follows the System Development Life Cycle method in determining its stages and activities. The framework is carried out through four stages, including 1) Preliminary analysis that determines strategic plans and service limits; 2) Submission of information technology infrastructure that describes services, actors and information technology components; 3) Explain the factors of production for each service; and 4) Delivering the initial plan to the executive who made the decision.
Thesis topic recommendation using simple multi attribute rating technique
Authors: Slamet C , Maliki F M , Syaripudin U , Amin A S , Ramdhani M A
Published: December 2019

The purpose of this study is to design information systems that can recommend the selection of final project (thesis) topics based on the competencies possessed by students. The analytical model integrated into this system is the Simple Multi Attribute Rating Technique (SMART), with student competency data taken based on the grade score of the subjects relevant to the selection of the final project theme clusters. The design of the information system in this study uses a prototype model, with the main stages consisting of needs analysis, design, testing, and evaluation. The system designed successfully runs well and can provide recommendations on the selection of thesis topics. This recommendation provided an overview of the strength of competencies that are superior to students what have relevance to the cluster of the thesis main topics.
In silico analysis of kaempferol as a competitor of estrogen on estrogen receptor alpha of endometrial cancer
Authors: Yani S , Opik T , Siti R , Ida K , Epa P
Published: December 2019

In-silico study of kaempferol has been performed to determine its potential as a natural estrogen competitor in an effort to suppress the growth of endometrial cancer. This study used a method of molecular decelerating of kaempferol against estrogen receptor alpha, which is compared with natural estrogen in the body. The research process was conducted at the Laboratory of Biology Department of Science and Technology Faculty of UIN Sunan Gunung Djati Bandung, from December 2017 until February 2018. The software used in this study is PyRx-Virtual Screening Tools (for molecular docking process) and Discovery Studio (for pose visualization and data analysis). The results showed that kaempferol is a potential natural estrogen competitor. It is indicated by the lower binding affinity value of kaempferol (-7.0 kcal/mol) than the binding affinity of natural estrogen (-6.7 kcal/mol). The low-affinity binding value shows a stable interaction. This means that Kaempferol is a potential phytoestrogen for cancer therapy without side effects.
Combination of e-readiness models to assess based on system approaches at cooperatives in Indonesia
Authors: Manaf K , Alam C N , Rahman A B A , Subaeki B , Kaffah F M
Published: December 2019

The 4.0 industrial revolution, on the one hand, will open opportunities for the domestic product market to compete internationally and vice versa. Business competition is so tight, the existence of free markets and advances in information technology, robotics, artificial intelligence, transportation, and communication are rapid, giving changes quick on the economy. The way to adapt to the outlook and the ability to project change in the environment and be able to determine the right strategy for this change is a must for organizations that are committed to survival as in Cooperatives in Indonesia. Regarding this problem, there are several e-readiness models that have been developed to test readiness or ability to provide platforms, comparisons, and estimates including TRAM (Technology Readiness and Acceptance Model) and several variables namely business content and institutional contexts that influence the model. The results show that the TRAM 2.0 model and E readiness are related to each other. The E-readiness model has 2 success factors for The McLeod and MacDonell’s projects as attributes used for readiness input. From the correlation process, added a new factor, called Business Content, Institutional Context so that the E-readiness model has 8 factors.