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The magnetic nanoparticles, Mn1-xNixFe2O4 (0.0≤x≤0.75) that synthesis used iron sand from Kerandangan Beach Lombok as raw material was successfully synthesized by the co-precipitation method at a temperature of 100oC. The XRD result shows that the samples have a single phase of cubic spinel crystal structure for the sample with x:≤0.50, on the other hand, the secondary phase of α-Fe2O3 obtained at x = 0.75. The lattice parameter is constant and crystallite size decreases when the x values increase. Whereas, the dislocation density and the lattice strain of the sample increase, respectively. Characterisation by SEM-EDS shows that the particle size of the sample is about 10.63 nm − 34.71 nm with the average diameter 21.26 nm and consists of Fe = 58,9 % wt; O = 35,0 % wt; Ni = 3,2 % wt and Mn = 2,9 % wt in the synthesized samples. The VSM result shows that the superparamagnetic hysteresis loop for each sample. Furthermore, the magnetic properties, such as coercivity, saturation, and remanence decrease with the increase of the x content. Studies of the structure and magnetic properties show that Mn0.5Ni0.5Fe2O4 tends to superparamaganetic nanoparticle behavior with smaller crystallite size 14.48 nm, lower coercivity field 111 Oe and high saturation magnetization 35.05 emu/g. [ABSTRACT FROM AUTHOR]

A dual engine with one particle in a three-dimensional symmetry potential well, as a quantum working fluid, has been modeled. This research is based on the possibility to enhance the efficiency of a classical dual engine based on the 1st law of thermodynamics. The quantum system used is a modified analogy from the classical thermodynamic system, which is the ideal gas in the piston cylinder. By assuming the ideal gas pressure as a potential wall mechanical force, the ideal gas volume as the width of the potential well, and the ideal gas temperature as the total energy expectation value for a single particle, a dual quantum engine can be built theoretically. The five processes that work on each classical dual cycle can be analogous to the quantum system. The result is the similarity thermal efficiency equation of a quantum dual engine and the classical one. Besides, the heat capacity ratio of the quantum dual engine is greater than the classical engine which causes the efficiency of the quantum version to outperform the classical version when it is in the same mechanical ratio conditions. [ABSTRACT FROM AUTHOR]

The growth of Ba1-xSrxTiO3 ferroelectric film has been successfully doped using mole variations of Sr-doped with the percentage of 1%, 3%, 5%, and 10%. Variations were made to determine the effect of Sr-doped mole concentrations on the microstructure, optical properties, and electrical properties of the coating applied to the photovoltaic effect. The deposition of the film was done using the Chemical Solution Deposition (CSD) method that was prepared using the spin coating technique. The film was characterized using UV-Vis, X-Ray Diffraction (XRD), and I-V meters. The results showed that the greater concentration of Sr-doped made the crystallite size and resulted in the smaller percentage of transmittance. The transmittance value of Ba1-xSrxTiO3 film at all concentrations increased when the wavelength was 320 nm to 800 nm. The transmittance value < 50% means that the film has made the ability to absorb the light. I-V graph shifted in dark and light conditions when it was given a voltage so that it formed a diode graph. [ABSTRACT FROM AUTHOR]

The Klein-Gordon equation application with modified Woods-Saxon potential was studied in the case of scalar and vector potential. The Klein-Gordon equation is used to explain the behavior of electrons if the velocity of electrons is assumed to be an approach to the speed of light because this phenomenon can not be explained by the Schrodinger equation. The hypergeometric method was used to gain the energy of relativistic and wave functions of Klein-Gordon equation. The energy of relativistic was obtained by using the Matlab R2013A software numerically. While the wave functions were investigated analytically. The relativistic energy was obtained from the equation of Klein-Gordon can be reduced to nonrelativistic energy in the Schrodinger equation. The result showed that the energy relativistic was decreased by the increase of quantum numbers. The wave functions that have not been normalized were avowed in hypergeometric. This paper can be used as a reference for other studies with similar potential such as harmonic potential and Coulomb potential. [ABSTRACT FROM AUTHOR]

In this study, the magnetoimpedance ratio depends on gamma irradiation in electrodeposited [NiFe/Cu]6 multilayers are presented. The [NiFe/Cu]6 with meander structure on Cu PCB is composed of a NiFe layer with a Cu interlayer. Samples multilayer of [NiFe/Cu]6 with and without irradiation 3O Gy by Co-6O gamma radiation are evaluated the impedance magnitude under various magnetic fields. The change of the impedance under the magnetic field or the magneto-impedance effect is studied for modify frequency. The result shows that the magneto-impedance ratio decreases from 3.5% to 2.33% for the sample without and with gamma irradiation. The change of morphological surface sample should attributable to a decrease of the magneto-impedance ratio. The magneto-impedance ratio increases with the increase of frequency, both without and with irradiated samples. [ABSTRACT FROM AUTHOR]

In this study, cobalt ferrite doped with manganese ions (MnxCo1-xFe2O4) was carried out. The magnetic nanoparticles were synthesized with coprecipitation method for x = 0.25, then annealed with variation temperature 200°C; 300°C; 400°C; and 500°C. Uv-Visible spectrophotometry is used to measured photocatalytic performance including the efficiency of photocatalytic as well as the rate constant of MB degradation and the optical energy bandgap. The degradation efficiency was 59%; 62%; 64%; and 77% for samples with annealed temperature at 200°C; 300°C; 400°C; and 500°C. The optical band gap energy (Eg) was calculated for all samples with the plot (αhv)2vs hv, the result determined the energy bandgap Eg to be around 1.78 eV. The addition of manganese in cobalt ferrite causes the bandgap energy to lower into the visible light absorption area, so it is good for photocatalyst. [ABSTRACT FROM AUTHOR]

Carbon is one of organic elements, which important for human life and can be used to determine the characteristics of materials. Some techniques usually used to identify carbon element is spark spectroscopy and combustion spectroscopy. But in this method, the sample should have a special treatment such as hit by the electric spark, and requires a long time for the preparation. In this work, identification of carbon element has been made by using laser- induced breakdown spectroscopy utilizing a high-power pulse Nd:YAG laser. The material used as a sample was graphite plate, which contains high concentration of carbon. Experimentally, a pulse Nd:YAG laser was directed and focused on the graphite plate sample to induce a luminous plasma containing excited atoms, electrons, and ions from the graphite plate. The analytical emission spectrum obtained from the graphite plate using the present technique. It can clearly be seen that many atomic and ionic emission lines are observed with relatively high intensities and low background emission. Based on experiment, it was found that the optimum sensitivity was obtained with increasing pulse laser repetition rate and laser energy. [ABSTRACT FROM AUTHOR]

Nanoparticles of bismuth substituted cobalt ferrite (CoBixFe2-xO4, x = 0.1) were prepared by the co-precipitation method. The structural characterizations of the prepared samples were carried out using X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The crystallite size was determined by Scherrer's equation with the result 18.53 nm for an un-annealed sample and 20.36 nm for the annealed sample. This increase has indicated that annealing can control particle growth. The lattice constant decreases while strain and density in the sample increase with the annealing treatment. The spectral analysis two bands were observed in the range ∼400-600 cm-1 which confirmed the spinel structure of nano ferrites. [ABSTRACT FROM AUTHOR]

The purpose of this study is to solve the Schrödinger equation with the position-dependent mass in bispherical coordinates. In this study, we use the Supersymmetric quantum mechanical method with central Gendenshtein III potential. The separation of variables is used to reduce the 3D Schrödinger equation to 1D. The results obtained in this study are the eigenvalues and wave functions of the radial part equation. [ABSTRACT FROM AUTHOR]

This work described an experimental investigation of the synthesis in high-purity zircon (ZrSiO4) powders from zircon sand by varying the processing procedure. The zircon powder was obtained from natural zircon sand taken from Kereng Pangi, Central Kalimantan. The sand was subjected to sieving (mesh 40) and planetary ball milling for 2h. Impurities in the sand were reacted using HCl or NaOH and removed from the precipitate. The purification process was carried out by firstly optimizing the HCl concentration (0.5-2.0 M) and heating temperature (60-100 °C) during stirring of the mixture of the sand and HCl to remove the Fe, Ti, and Ca-based substances. The samples were precipitated and washed with distilled water to achieve a neutral pH. To remove excessive silica, the distilled powders were reacted with NaOH and again washed with distilled water until neutral. The products were powders which were then subjected to X-ray diffraction characterization where the data were qualitatively and quantitatively analyzed using Match! and Rietica softwares. It was found that 0.8 M HCl concentration and heating at 80 °C was the most effective condition to produce a single phase of zircon. A lower reaction temperature required higher HCl concentration, while a higher temperature of 90°C might give pure zircon powder but applying 100 °C produced some impurities which were possibly due to more rapid evaporation of HCl. [ABSTRACT FROM AUTHOR]

Photocatalysts performance of the fine sediment magnetic present in this paper. The fine sediment is obtained from Bengawan Solo river. After magnetically selection following ball milling procedure, the obtained sample then irradiate treatment by Gamma irradiation Cobalt-60 source for 400 Gray. Fine sediment magnetic without gamma irradiation is selected as compared sample. Methylene blue is used as the source of the source of the dyes. The Photocatalyst result shows that the magnitude of the degradation ratio increase from 62.92% to 79.92% for the sample without and with gamma irradiation. The change of bandgap energy becomes smaller for the irradiated sample should contribute to the increase of the degradation ratio. Also, the fine sediment magnetic indicates as absorber-active material. [ABSTRACT FROM AUTHOR]

The (1-x-y) BaTiO3 - xBiFeO3 − yNaVO3 materials with doping variation {x = 0; 0.15, y = 0; 0.01} was successfully performed by a solid-state reaction method by means of a calcination temperature at 700°C for 2 hours. Each component was prepared separately; the BaTiO3 precursor was synthesized through oxalate coprecipitation, the BiFeO3 precursor prepared through sol-gel auto-combustion, and finally a precursor NaVO3 prepared by attritor milled of Na2CO3 and V2O5. The dopants materials BiFeO3 and NaVO3 were chosen considering that they have similar perovskite structure with BaTiO3 matrix for the ease of diffusion proses during structural shaping. The calcined powder then pressed to a disc shaped before sintering at 1050°C for 2 hours. The characterization includes X-Ray Diffractometer (XRD) for phase identification, lattice parameter and particle size using Debye- Scherrer formula. The Impedance Analyzer (Solartron SI-1260) for the electrical properties characterization. The analysis shows single phase perovskite tetragonal structure (P4mm) and nano size particle (≈ 65 nm) for calcined powder and ≈ 130 nm for sintered sample. The doped sample show space charges significantly at low frequency and pose high loss tg, on the other hand at high frequency (> 103Hz) both doped and the un-doped has similar characteristics on permittivity εr and quality factor Qf. [ABSTRACT FROM AUTHOR]

The Bohr Mottelson model investigates the collective behavior of atomic nucleus [1]. The collective models are the combination of liquid drop model and shell model [2]. It is used to describes rotational and vibrational of the nucleus and also the deformed nucleus that corresponds to the excitation energy [3]. By solving the Bohr Mottelson, properties and mechanism involved in atomic nucleus can be obtained, such as energy spectrum and shape phase transitions [4]. The Bohr Mottelson has been solved for modified Davidson potential [5], Eckart potential [2], Kratzer potential [6], Killingbeck potential [7], Hulthen plus ring shape potential and three dimensional harmonic oscillator potential [8]. This study, the Bohr Mottelson equation is solved for modified Wood Saxon potential in spherical coordinates. By using hypergeometric method, the energy and the wave function of Bohr Mottelson equation were obtained. Numerically, the energy spectrum was calculated by applying energy equation in MATLAB R2013A software. While, the wave functions were investigated using hypergeometric method. The results show that the energy spectrum was increased by the increase of quantum numbers (n and L). The unnormalized wave functions were expressed in hypergeometric terms. [ABSTRACT FROM AUTHOR]

This paper presents the results of a microstrip antenna design with bi-hexagonal geometric shapes. There are two characteristics of the bi-hexagonal antennas discussed, namely bandwidth and antenna work frequency based on antenna design parameters. The purpose of this research is to test the bi-polygonal antenna model in determining the bandwidth and working frequency of the bi-hexagonal antenna design. Testing has been done by comparing the modeling method of bi-polygonal antennas and the simulation method. The results of the analysis show that the bi-polygonal antenna modeling method provides the results of a narrower bandwidth calculation than the simulation method. For the determination of the working frequency, the bi-polygonal antenna modeling method gives the same results as the simulation method results. [ABSTRACT FROM AUTHOR]

Nano-zircon-reinforced poly (methyl methacrylate) (n-Z/PMMA) composites were prepared using a liquid mixture approach and their tensile storage moduli were investigated using a dynamic mechanical analyzer (OMA). The effect of the n-Z concentration, i.e., 1, 2.5, and 5 wt%, on the storage moduli of the PMMA-based composites was the focus of this work. The n-Z powder was synthesized from natural zircon sand from Kereng Pangi, Central Kalimantan. The natural zircon sand had been extracted to give pure zircon powder by magnetic separation, milling, leaching with HCl 2M, and reacting with NaOH. XRO patterns confirmed the formation of a single phase of zircon. A quantitative analysis of XRO data of 15h-milled zircon powder showed that the crystallite size of the zircon powder reduced to 33±1 nm (n-Z). The PMMA/n-Z composites were prepared by mixing the melted polymer and the n-Z powder at the desired concentration. OMA measurement was carried out to characterize the storage modulus of the composites. Results showed that the maximum storage modulus was reached by the composite with n-Z of 5 wt%. The composite exhibited storage modulus 1239 MPa higher than that of pure PMMA. The glass transition temperature of the PMMA/n-Z also increased, i.e., from 73°C for the pure PMMA to 86°C for the composite with 5 wt% n-Z addition. [ABSTRACT FROM AUTHOR]

Zinc oxide is material compatible for biosensors, which has good properties such as low cost, high stability and wide band gap. Aim of this experiment is to study the effect of variations concentration of phosphate buffered saline solution on the performance of zinc oxide thin film as a glucose biosensor. A Zinc oxide thin film was fabricated by direct current (DC) sputtering coating method on the indium thin film glass substrate, with 20 Watt electric power and 2mTorr argon gas pressure. Characterization used XRD to determine the crystalline phase, The Zinc oxide thin film is characterized by a cyclic voltammetry (CV) with scan rate of 5mV / s and different concentration phosphate buffered saline solution. A wurtzite structure of Zinc oxide has been acquired the crystal size 233 nm by using debye scherer equation (rietvield method) and optical band gap obtained 3.17 eV. [ABSTRACT FROM AUTHOR]

QCM or quartz crystal microbalance is a sensor that works based on the changes in the oscillation frequency of the crystal due to changes in mass on the surface. Therefore QCM can also be used as a gas sensor because it is expected that the change in part per million (PPM) volume of the gas will change the frequency of the oscillation. This research was aimed to identify the response of oscillation frequency changes from QCM in varying carbon dioxide (CO2)concentrations. A QCM with a fundamental frequency of 10 MHz was used as the sensor connected to the oscillator and frequency counter. A TSI Q-Trak Model 7575x was used to measure carbon dioxide concentration inside an experimental chamber. The results showed that changes in carbon dioxide gas concentrations given to the QCM surface changed the oscillation frequency of the QCM. This change was evaluated under a frequency counter. The greater the concentration of carbon dioxide gas given, the smaller the change in the frequency of the QCM oscillations that were read. The response of QCM frequency due to exposure to carbon dioxide gas concentration had a very good response and was very suitable to be used as a carbon dioxide gas sensor. [ABSTRACT FROM AUTHOR]

The 4-Dimensional Schrodinger's Equation is solved using the Supersymmetric Quantum Mechanics (SUSY QM) to obtain the first three energy spectrum and the ground state wave functions both in radial and angular parts. The non-central potential consisted of radial Scarf potential, and mix trigonometry potential such us Poschl-Teller, Rosen Morse, and Scarf for the angular part were used in this study. The energy equation of the 4-dimensional Schrodinger equation system was used to analyze some thermodynamic properties (vibrational mean energy and specific heat) of the system. [ABSTRACT FROM AUTHOR]

Delay time processing is the time lag between exposure and image processing. In general, after an X-ray examination, the Imaging Plate is not immediately processed after exposure is carried out because the location of the X-ray examination room and the processing room are not close together so that the time lag occurs and allows the imaging plate to have an impact on the exposure index value. The exposure index is a measure of the amount of exposure received by the image receptor. This research aims to determine the effect of delay time processing on the exposure index. The research design was an experiment with a variation of the delay time of 1 minute, 5 minutes, 10 minutes, 15 minutes, 20 minutes. The results of the experiment can show that the longer the delay time processing will result in a decreased exposure index value. For the longest delay processing time, which is 20 minutes, produces an exposure index of (0.84 ± 0.05) x 103. The decrease in the value of the exposure index is a result of electron activity. When exposed to X-rays, the electrons in IP are raised to a higher energy level and processed there for processing. Over time, some of these electrons return to a lower energy state, resulting in decay of the latent image. [ABSTRACT FROM AUTHOR]

We report the three-qubit quantum teleportation scheme through channel six-qubit states which composed of three bell state. We apply arbitrary six-qubit state as measurement basis. This protocol can be done with classical communication of the appropriate measurement between the sender and receiver. [ABSTRACT FROM AUTHOR]

Subcritical assembly for Mo-99 production (SAMOP) has been developed at The Center for Accelerator Science and Technology (CAST), National Nuclear Energy Agency (SATAN). The objective of the SAMOP development is to provide a prototype of a subcritical assembly which produces Mo-99 isotope. In the nuclear medical application, Mo-99 plays an important role as a generator of isotope Tc-99m which is the most widely used radioisotope for diagnostic purposes. SAMOP use uranyl nitrate solution UO2(NO3)2 as fuel as well as target material for the process of Mo-99 production. This process is based on the fission reaction of uranium U-235 contained in the uranyl nitrate solution. The U-235 fission reactions occur as long as there are still neutrons from external neutron source and it will stop whenever the external neutron source is removed. Presently SAMOP uses external neutron source from the radial beam port of the Kartini research reactor which emerges thermal neutrons in the order of 108 n/cm2s. For further development, SAMOP will be equipped with a compact neutron generator as an external neutron source. Compact neutron generator is a neutron source device that contains a compact ion accelerator and that produces neutrons by fusing isotopes of hydrogen. The fusion reactions take place in the device by accelerating either deuteron, triton, or a mixture of these two isotopes into a metal hydride target which also contains deuterium, tritium or a mixture of these isotopes. The fusion of deuterium atoms (D + D) results in the formation of a He-3 ion and a neutron with a kinetic energy of approximately 2.5 MeV. The fusion of a deuterium and a tritium atom (D + T) results in the formation of a He-4 ion and a neutron with a kinetic energy of approximately 14.1 MeV. SAMOP needs an external neutron source which can provide neutrons with an average neutron flux of 108 n/cm2s for maintaining the sustainability of U-235 fission reactions. The results of the study on compact neutron generator as an external neutron source of SAMOP show that a compact neutron generator has a chance to substitute a nuclear reactor as external neutron source of SAMOP. A compact neutron generator can produce fast neutrons which neutron yield is sufficient to meet the need of neutron for SAMOP. It depends on the type of the compact neutron generator, one of which is the compact neutron generator produced by LSNL i.e. the axial compact neutron generator which can produce neutron yield up to 109 n/s. The benefit of using a compact neutron generator as an external neutron source of SAMOP is that the operational cost will reduce since the neutron production cost using a compact neutron generator is cheaper than a nuclear reactor. In addition, the operational procedure of a compact neutron generator is simpler than a nuclear reactor. [ABSTRACT FROM AUTHOR]

This study examined the addition of synthetic dye LEG4 (DN-F05) to electrical properties. The Dye-Sensitized Solar Cell (DSSC) component to be tested is composed of FTO substrates coated by TiO2-Dye-Electrolite-Platina. The working electrode layer is Titanium dioxide (TiO2) which is deposited on the FTO substrate by the spin coating method. In order for this layer to dry it is then annealed in the furnace with a temperature of 450oC for 30 minutes. After that, the layer is soaked in dye. There are three variations of dye concentration LEG4, namely LEG4 (0.02 wt), LEG4 (0.08 wt), and LEG4 (0.1 wt) with ethanol solvent, then rotated on a stirrer hotplate for 2 hours. Another opposing electrode process is made by medically positioning liquid platinum on an FTO substrate. the counter electrode is used as a mediator. Testing the electrical properties using IPCE and I-V Meter. From this work is obtained a good efficiency in line with the decrease in dye mass concentration, i.e. 4.76%, 4.95%, 5.15%, these results are supported by IPCE test. [ABSTRACT FROM AUTHOR]

Quantum Brayton engine efficiency with the massless boson particle as a working substance has been investigated. The research method used is analogy modeling of the first law of classical thermodynamics which is implemented into the quantum systems. The quantum system used is the single massless boson particle trapped inside the two-dimensional symmetrical potential well as a replacement for the classic system is an ideal gas in a piston tube. By replacing the working substance from the classical system into a quantum system, the four processes that form the classic Brayton cycle (two isobaric processes and two adiabatic processes) can be constructed on the quantum system. The final result indicates that the quantum Brayton engine with boson particle has a higher efficiency value compared to the classic version, but is lower than that engine when the massless boson is replaced with nonrelativistic particles. This occurs because of differences in Laplace's constant value in the three systems. [ABSTRACT FROM AUTHOR]

Analysis of light elements such as H in metal sample is very imperative to be carried out. In this work, identification and analysis of H element in zircaloy metal sample has been conducted by using Nd:YAG laser-induced breakdown spectroscopy. Experimentally, a pulse Nd:YAG laser beam was focused on a zircaloy metal sample containing H in the He gas environment of atmospheric pressure. The effect of the flow rate of He gas was examined using the flow rate of 0.5 and 7 l/minute. The result certified that the identification and analysis of H in zircaloy metal sample containing 800 ppm H can be conducted at the He flow rate of 7 l/minute. The limit of detection of H was calculated to be around 100 ppm. [ABSTRACT FROM AUTHOR]

Particle size plays an important role in the designs of calcium carbonate-based material. Small particle size in the order of micrometer of event nanometer size is preferred. The raw materials were ground from the big particle size to the smallest possible by using multistep grinding. In the laboratory, the common method to be used as the ball mill. This work aims to design a simple horizontal ball mill. Calcium carbonate material from limestone and eggshells powder was ground using the developed ball mill. The balls to powder ratio (BPR) and powder type were investigated in relation to the particle size. The study showed that the combination of the BPR and powder type affects the particle size result. The optimum of BPR at 12 with the number of balls is 60 pieces, and the filling rate is 10.13%. The result shows that the horizontal ball mill able to grind the calcium carbonate to a size of smaller than 100 mesh (149 µm). [ABSTRACT FROM AUTHOR]

This study investigated the effect of assisted web-based recitation program of undergraduate students' concept enhancement in static fluid. It is a follow up analysis of our previous work. The mixed method with embedded experimental design was utilized with 24 undergraduate students of Physics education Universitas Negeri Malang enrolling in introductory physics course. The quantitative and qualitative data were collected by written test (pretest and posttest) with 12 reasoned multiple choices questions to analyze the students' concept enhancement after using assisted web-based recitation program. The data was analyzed with Wilcoxon signed-rank test, N-gain, d-effect and N-gainlike. The result showed that assisted web-based recitation program led to statistically significant increase in the students' concept understanding, especially in the concept of static fluid with d-effect size of 1.81 and N-gain of 0.23. In fact, this study also still found that students had difficulties in mastering some fluid static concept. [ABSTRACT FROM AUTHOR]

In connection with manufacture of the Pulse Electron Irradiator (PEI) the condition for obtaining a maximum electron extraction current has been studied. The value of the pulsed electron extraction current in the PEI depends on the shape and size of the Emitter Vessel (EV) which is proportional to the anode area Sa, the extraction window area Se and the parameters constant of the discharge G. The relation of G Se/Sa < I for the occurrence maximum electron extraction has been proved by the law of conservation of the discharge current that occur in EV. The use of the anode area Sa of 770 cm2 and the extraction window area Se of 90 cm2 on the PEI prototipe has been eligible for the application of the maximum electrons extraction current Ieof 4.17 A for using extraction voltage Uextof 5 kV only. [ABSTRACT FROM AUTHOR]

Quantum teleportation is a procedure that allows one party (Alice) to send a quantum state to her friend (Bob) without that state being transmitted in the usual sense. In this study, bidirectional quantum teleportation of an arbitrary single-qubit state is using 4 qubit channels. The special channel is chosen for the bidirectional quantum teleportation by using the Channel Matrix Parameter, then the product state between information and channel has interacted. Furthermore, measurements were made using Bell's measurement bases by Alice and Bob. The measurement results (with Pauli matrices σx, σy, σz) are communicated classically between Alice and Bob, so that information obtained by accordance with the information sent. [ABSTRACT FROM AUTHOR]

Finite Differential Time Domain widely used in electrical analysis and design electromagnetic field. A two dimensional modeling ZnO Nanostructure was established and approach to find a low cost glucose sensor and derived as a diabetes disease detector. Authors were interested with a PtCu as a good glucose sensor and want to find an alternative low cost glucose sensor. This letter shows that ZnO nanostructure has a linear correlation of Electromagnetic Field distribution with PtCu when given a laser with wavelength 350 - 700 nm. Electric field value decrease when EM wave given at 450 - 550 nm both of ZnO and PtCu and tend to steady at wavelength 600 nm more. In this letter we propose ZnO as a low cost glucose sensor with high sensitivity. [ABSTRACT FROM AUTHOR]

One of the essential competencies of the 21st century is creative thinking skills. Creative thinking skills are important because it helps students look at prblems and situation from a different perspective. The purpose of this study to an analysis of students' creative thinking skills profiles on the work and energy topic. The research used subject were 36 students of eleventh grade from 4 senior high school in Boyolali regency, Central Java. The subject is chosen by a cluster random sampling technique. the instrument used 7 question developed based 3 aspect of creative thinking skills, originality, fluency, and flexibility. The instrument tests were adaptation and modification on Scientific Creativity tests by Hu and Adey. The results of the research indicated that students creative thinking skills still low. [ABSTRACT FROM AUTHOR]

Plumeria alba is known to contain active compounds of alkaloids and saponins that act as antibacterial, while Plumeria rubra has not been widely studied but empirically has been widely used as a medicine. The purpose of this study was to evaluate the content of phenol and saponin active compounds and the antibacterial activity of P. rubra flower and leaves extract, also P. alba leaves extracts. Phenol compounds were analyzed based on the Folin-Ciocalteu reagent, and saponins amounts were determined by measuring absorbance with a spectrophotometer at a wavelength of 544 nm, each of them consisted of three replications. Bacterial activity test was carried out using the paper disc method, each activity test consisted of 3 replications. The research data were analyzed using a completely randomized design. The results showed that the total phenol was significantly higher in P. rubra flower extract (2.96), saponin was significantly higher in P. rubra leaves extract (4.27%). Whereas the best inhibition (clear zone) against E. coli is in P. rubra flower extract (8.33 mm). It can be concluded that the highest phenol active compound was found in P. rubra flower extract, and the highest saponin was found in P. rubra leaf extract. The best clear zone is obtained from P. rubra flower extract. [ABSTRACT FROM AUTHOR]

The Dalem Mangkubumen is the residence of Prince Adipati Anom, Crown Prince of Yogyakarta, Sultan Hamengku Buwono VII candidate. This study aims to uncover the transcendental space inside the Mangkubumen that is still hidden. To reveal this transcendental space will be used by the phenomenological method according to Husserl (1965). This method was performed directly in the field by researchers with the epoche technique, which revealed the phenomena of transcendental space that appear naturally in the field. Another technique is to dig deep into information through experienced informants related to transcendental spaces inside Mangkubumen. From this study, the preliminary findings obtained are the existence of space (half space) within the great Preparation hall which is the transcendent center of Mangkubumen. In the great preparatory world is this transcendent space created specifically for the spiritual dwelling. This study concludes that transcendent space has been planned since the beginning of the occupation as spiritual beings. Thus spiritual beings coexist with human beings to help and sustain human life and forging a building within the Mangkubumen. [ABSTRACT FROM AUTHOR]

This research aims to examine the effectiveness of a multi representational approach to improve students' understanding of circular motion. The subject consisted of 28 students of grade X of a public high school in Malang, Indonesia. The main students' learning activity was to describe circular motion using various kinds of representation including graph, vector diagram, and equation. The students' understanding was assessed using a reasoned multiple-choice test. The students' responses to the multiple-choice test were analyzed quantitatively, whereas the students' explanation was analyzed qualitatively. The results showed that the students' understanding significantly improved with - d-effect size of 2.86 and average normalized gain of 0.63. Most of the students became able to determine velocity and acceleration vectors based on a given motion diagram. The most significant improvement of the students' ability was to determine the centripetal acceleration of the object. However, many students still had difficulties with graph of angular velocity versus time and determining tangential acceleration of pendulum motion. [ABSTRACT FROM AUTHOR]

If these concepts are not understood correctly or there is a misunderstanding of the concept, there will certainly be difficulties in the learning process and its application. Therefore, researchers try to analyze the misconceptions that occur in students who have studied biotechnology courses on the concept of plant biotechnology. The research approach is qualitative with the research method used is descriptive qualitative. The study population was students of Biology Education STKIP Persada Khatulistiwa Sintang, Indonesia and the samples used were 29 students who had studied biotechnology. Data collection techniques with multiple-choice diagnostic tests and interviews. Data analysis using Certainty of Response Index (CRI) and descriptive. The results obtained are misconceptions about the overall concept of plant biotechnology by 41%. From these data it is known that quite a lot of biology education students experience misconceptions on the concept. The results of the interview also concluded that students experienced misconceptions not only due to difficult and abstract concepts but also due to information obtained previously from print, online or other social media, teaching staff, and peers. This research is useful for teaching staff to overcome the factors causing misconceptions such as textbooks and also become a reference for further research. [ABSTRACT FROM AUTHOR]

This study aimed to describe the results of errors, scaffolding levels and techniques, time, and changes in the process of completion of students before and scaffolding on colloidal material. The results of this research are expected to be able to provide a picture of the scaffolding applied in class to help students become more independent and actively involved in learning. This type of research is explorative qualitative research. Determination of Subjects used purposive random sampling consisting of 2 high academic achievements students (HAA), 2 medium achievements students (MAA) and 2 lower academic achievements students (LAA). The results of the most widely performed error analysis of HAA, MAA, and LAA are errors of understanding, mistakes in process skills, and careless errors. The level of scaffolding required by HAA, MAA, and LAA is level 2. Decreasing the scaffolding time for HAA, MAA, and LAA after getting the first scaffolding. All students complete the process of repairing colloid material after getting Scaffolding. Students can correct their mistakes and are also able to understand more successfully solving problems in colloidal topic. [ABSTRACT FROM AUTHOR]

Malaria is an infectious disease caused by Plasmodium that lives and reproduces in human red blood cells. There is currently a large number of malaria cases in Indonesia. Several factors influencing the development of malaria in Indonesia is the ratio of the center of public healthcare, the percentage of households that have access to proper sanitation, the percentage of households that occupy livable homes, the number of general practitioners, and the number of people living in poverty. The relationship between malaria and its factors can be modeled using regression analysis. Regression analysis is usually estimated by using Ordinary Least Square (OLS) estimation. However, because there are outliers in the malaria dataset, it can be analyzed using robust regression. There are several estimation methods in robust regression, including M and S estimation. M estimation is an extension of Maximum Likelihood Estimation (MLE). It is robust, unbiased, and has minimum variance estimation. Meanwhile, S estimation is a family of high breakdown points, which is a general measure of the proportion of outliers data that can be handled before the observation affects the prediction model. The results show that the best model is a robust regression with S-Estimation. The factors that have a significant influence on the number of malaria in Indonesia are the percentage of cleaning water, the percentage of livable homes, and the number of the center public of healthcare in Indonesia with R2 = 98.5%. [ABSTRACT FROM AUTHOR]

Many statistical models are used in the actuarial calculation process in modeling insurance data, one of which is the Generalized Linear Model (GLM). This study will estimate the actuarial approach of the value of the claims in the multinomial setting with the GLM Poisson Regression model. The data used in this study is the value of life insurance claims with Poisson distribution at West Sumatra Province as many as 1021 data. The best model is selected by comparing the smallest Akaike's Information Criterion (AIC) value, with significant risk factor parameters such as contract, age, month, and benefit. The smoothing approach is due to the best model of GLM Poisson Regression. The average claim value of the best GLM Poisson Regression model is lying in the second category between 20 million until 40 million rupiah. It is mean with the increase of the value of the claims on insurance indicates the high awareness of the public about the importance of insurance. [ABSTRACT FROM AUTHOR]

One goal of development land transportation system is to build a safe and well organized land transportation system. A safety and well organized system referred to the number of traffic accidents that occur. A small number of traffic accidents that occurs show a good quality of land transportation system. This research will estimate the number of traffic accidents on land transportation in Indonesia by using a non-homogeneous compound Poisson process. The Poisson process { N (t) , t ≥ 0 } is called a non-homogeneous Poisson process when the parameter λ is not a constant function. It is notated as λ(t). The sum of independent and identical random variables to their indices following the Poisson process is a compound Poisson process. A compound Poisson can be expressed as Y (t) = ∑ i = 1 N (t) X i , t ≥ 0. where { X i , i ≥ 1 } is a set of random variables. In this paper, the function λ(t) = a + bX, with a and b coefficient values, can be determined using a linear model Yi = a + bX. The non-homogeneous compound Poisson process is explained by determining the assumptions, variables, and intensity function needed. As the result, it is obtained that the Poisson process is not homogeneous compound with rank compilation function is E (Y (t)) = (a t + b 2 t 2) μ 1 . The mean of the Poisson and homogeneous compound process is 144t + 0,016t2 as an estimation of the number of traffic accidents in Indonesia. [ABSTRACT FROM AUTHOR]

Diabetes Mellitus is a non-communicable, incurable, and deadly disease. Most people with Type 2 Diabetes Mellitus (Type 2 DM) suffer because it makes them more vulnerable to complications with other diseases. This is because the main factors besides heredity (genetic) are obesity and an unhealthy lifestyle. Although Type 2 DM is incurable, patients with Type 2 DM can reduce the risk of complications and can survive longer if patients receive routine treatment. Here, we introduce a compartmental SlShEIT model used to understand the spread of Diabetes through social contact. Analytical results conducted to determine the nature of the positivity and limitations of the model. Furthermore, we also identify and analyze the equilibrium points, identify the basic reproduction number (R0), and analyze the stability of the endemic equilibrium using the Castillo-Chaves and Song Theorem. Some numerical results discussed at the end of this article shows how our model could help understand the behavior of Diabetes Mellitus, especially when we should consider the different risks among susceptible individuals. [ABSTRACT FROM AUTHOR]

Increasing the need for alternative fuel sources is triggered by the increasing demand for global energy. Biofuel is a renewable alternative energy that could be produced by a plant; one example is Jatropha curcas. The main obstacle in the growth of Jatropha curcas that this plant is susceptible to mosaic disease caused by whitefly vectors. Various strategies develop to overcome this plant disease. However, the success of this strategy strongly influenced by the level of awareness and prevention programs carried out by farmers and other parties concerned. This paper will focus on mathematical models for controlling the Jatropha curcas mosaic disease with insecticide and nutritional intervention. Mathematical models that involve interventions that also depend on the level of population awareness will be analyzed. Based on the analytical studies carried out, we obtain two equilibrium points: disease-free equilibrium and endemic equilibrium. Autonomous simulation results show that the higher the infection rate among the whitefly vector, the increased number of infected whiteflies. The amount of insecticide can also affect the population of whitefly ticks. [ABSTRACT FROM AUTHOR]

Bitcoin is electronic money that can be used as an alternative for investment. Investors will get benefit buying bitcoin when the price of bitcoin is down and reselling it when bitcoin prices are increasing. The fluctuating bitcoin prices cause forecasting as a basis for investors to make decisions, where the time series method is used as a forecasting model, then a pattern can be found to predict future events. The classical time series methods are often violating the statistical assumptions. To face these problems, then it is used free assumptions methods, the method with the Fuzzy Time Series Markov Chain, the Chen Logical Method, and its segmented methods due to unbalancing forecasting results. This study is built the forecasting model of the price of bitcoin for the coming period based on the data from 2010 to 2020. The proposed methods have a better fit for bitcoin time series data prices. Besides, the Fuzzy Time Series Markov Chain method has the slightly smallest accuracy error based on Mean Absolute Percentage Error (MAPE) comparing to the Fuzzy Time Series Segmented Chen Logical Method and Fuzzy Time Series Chen Logical Method. [ABSTRACT FROM AUTHOR]

The deep learning method is a promising computational technique, especially for image classification problems. One of them is the Convolutional Neural Network (CNN), which is the most popular neural network model used and can understand enough the data. Although CNN is highly accurate, overfitting is a problem that frequently occurred. It could prevent it by optimizing the CNN method using diffGrad optimizer to overcome it. The proposed algorithm performance was validated using the cataract dataset. A cataract is an eye disease that has a clouding of the lens that affects the vision, and it is hard to detect at first. This research purpose is to classify the fundus image of cataract using CNN and optimize it using diffGrad optimizer. Finally, from the simulation results on the data from the Kaggle datasets, it is shown that the proposed algorithm can classify the data into two classes. The classes are normal fundus images and cataract fundus images. Also, diffGrad optimizers can increase the accuracy of the classification. [ABSTRACT FROM AUTHOR]

A chronic metabolic disease that often affects adults is type 2 diabetes. Dipeptidyl peptidase-IV (DPP-IV) inhibitors are drug targets for diabetes mellitus type 2 (T2DM) that can block the enzyme dipeptidyl peptidase-IV. At this time, there are adverse effects from these inhibitors. Therefore, novel DPP-IV inhibitors are still expected with minimal adverse effects. In this paper, a machine learning approach is used to predict the molecular structure of DPP-IV inhibitors. There are 3363 inhibitors consisting of 1849 inhibitors with active labels and 1514 inhibitors with inactive labels that are optimized using fingerprint topology as descriptors. However, fingerprint topology always produces high-dimensional data. So, the principal component analysis method is proposed to reduce the dimension of the data set. Then, support vector machine, decision tree, and neural network are used for classifying DPP-IV inhibitors. The overall classification using the support vector machine method produces specificity, sensitivity, accuracy, and Matthews coefficient correlation C, respectively 0.774, 0.826, 0.803, and 0.604. These results indicate that the support vector machine method has a good ability in the classification of active and inactive DPP-IV inhibitors based on topological fingerprint as descriptors. [ABSTRACT FROM AUTHOR]

This paper discusses fixed-b asymptotic distribution models which have been developed for panel data suffered by the problems of autocorrelation and heteroscedasticity. The fixed-b asymptotic distribution models can be used to infer the parameter of interest. For the purpose of inference the Bartlett Kernel Fixed-b Critical Values have been utilized. This technique is applied to analyze drop-out rates for the elementary and junior high school students in Central Java. The results showed that the drop-out rates in Central Java Province are significantly affected by morbidity rates, GRDP, and gross enrolment rates. [ABSTRACT FROM AUTHOR]