bluuebunny/crossref_metadata_2025 huggingface dataset:
Ergonomic evaluation of low-cost prosthetic products: comparison between rigid and flexible ankle joint design
Authors: Muslim K , Setiawati N L P S , Girsang K S , Yassierli
Published: May 2020

Disability due to an amputated leg affect people in Indonesia, including those with low to middle income categories. To facilitate them, Yayasan Difabel Mandiri manufactures a low-cost flexible ankle prosthetic to fix the shortcomings of the rigid ankle prosthetics available in the market. This experimental study aimed to evaluate the use of flexible ankle prosthetic for daily activities. Seven disabled people simulated a walking task with or without a backpack loaded with 10% of body mass using two prosthetic types (i.e., flexible and rigid ankle). Measures were obtained to evaluate the performance of the prosthetic including the center of pressure (COP) indicating static and dynamic stability and subjective ratings of prosthetic evaluation questionnaire (PEQ). Results showed a significant difference in dynamic stability between the rigid and flexible ankle prosthetic foot with a better performance indicated by the flexible ankle joint design. No differences were shown for the use of backpack. Flexible ankle further improves the quality of life of disabled people specified by 12.76% higher average rating of PEQ. In conclusion, flexible ankle joint potentially improves the design of the prosthetic foot to meet the need and comfort of disables.
Interaction of inertia and cavitation in textured hydrodynamically lubricated bearing in very low sliding velocity considering slip
Authors: Jamari J , Hilmy F , Muchammad M , Tauviqirrahman M
Published: May 2020

Surface texturing is becoming an effective way for increasing the performance of hydrodynamic bearings. However, introducing the texture on the lubricated sliding contact may lead to the presence of the inertia effect as well as the cavitation effect. In this study, the correlation between the inertia and the cavitation in textured bearing is investigated in terms of hydrodynamic pressure and load support. The Navier-Stokes equation based on CFD and modified Reynolds equation are applied. In addition, the use of slip condition and its effect on the performance of bearing is of particular interest. The simulations are conducted in very low sliding velocity to address the low inertia effect. The result shows that increasing inertia effect can increase the load support, but the cavitation effects is not found in the bearing pattern in which the inertia is not significant. The other interesting result concludes that slip reduces the load support, but on the other hand slip also increases the load support depending on the texture length.
Natural zeolite study as a catalyst: A case study of pyrolysis of polyethene terephthalate (PET) waste into liquid fuel
Authors: Nuryosuwito  , Soeparman S , Wijayanti W , Hamidi N
Published: May 2020

Plastic waste is still one of the biggest problems of environmental pollution because it is nonbiodegradable. One effort to utilize plastic waste is the process of pyrolysis of plastic waste into alternative fuels. This study aims to optimize the pyrolysis process by using local natural zeolites. Local natural zeolite is mashed with a size of 250 mesh and mixed into PET as a catalyst for the pyrolysis process. The plastic material used in this study is Polyethylene Terephthalate (PET) which was cut to 1×1 cm2 in size. The zeolite ratio used is 10% mass basis. The heating variation was set at temperatures of 250, 300 and 350 C with a heating time of 60 minutes. The results showed that the use of local natural zeolites for PET pyrolysis produced more fuel liquids, but some important physical properties related to the fuel for SI engines decreased.
The effect of adhesive concentration variation on the characteristics of briquettes
Authors: Dewi R P , Kholik M
Published: May 2020

The depletion of fossil fuel reserves is increasingly encouraging people to see other renewable energy sources. Strategic steps can be taken is applying the concept of energy diversification. One of the simplest and easiest ways to diversify energy is through biomass energy utilization. Indonesia has abundant biomass energy sources, which can come from waste. Potential wastes that can be used as raw material for briquettes are sawdust and coconut shell waste. The purpose of this study was to determine the effect of variations in the adhesive concentration of starch on the characteristics of charcoal briquettes which include caloric value, moisture content, and ash content. The research is done with variating of adhesive concentration 4%, 6%, and 8% with sawdust and coconut shell composition 75%:25%. The research result shows that briquettes with 4% of adhesive concentration have caloric value 6974.022 Cal/g, moisture content 4.518%, and ash content 1.364%. Briquettes with 6% of adhesive concentration have caloric value 7561.582 Cal/g, moisture content 4.232%, and ash content 1.762%. Briquettes with 8% of adhesive concentration have caloric value 6996.102 Cal/g, moisture content 4.455%, and ash content 1.623%. The characteristics of briquette have fulfilled the value of briquette quality standard SNI 01-6235-2000. The most optimum of adhesive concentration in briquette production from the research was 6%.
Effect of virtual reality usage on postural stability
Authors: Pujiartati D A , Ananta M F , Muslim K , Setiawati N L P L S , Iridiastadi H
Published: May 2020

Virtual reality (VR) is a technology that has been widely used for various industrial purposes in recent days. Despite the potential benefits, VR usage may impose adverse effects that can prevent users from reaching their goals of using VR safely and comfortably. One potential adverse effect is the disruption of postural stability during VR usage. This study aimed to evaluate the effect of using VR on postural stability. Fourteen participants involved in the experimental set up playing a simulated game with Samsung Gear 3 Head Mounted Display (HMD) for 30 minutes with standing posture. During the experiment, the center of pressure data was obtained every 10 minutes using a force plate to calculate postural stability using three parameters including mean distance (MD), mean velocity (MV), and sway area (SA). The results showed that a longer duration of VR usage significantly increased MD and SA. Meanwhile, MV remained constant throughout the experiment. It means the use of VR may worsen users’ postural stability. Thus, caution should be used to develop a future guideline to increase VR safety.
The mineral content and vitamin d on bone flour fish yellowfin tuna
Authors: Talib A , Hariati A M , Nurhidayati F
Published: May 2020

Vitamin D is in charge of regulating the amount of calcium in the blood, bones, and intestines, besides this vitamin is also useful for increasing the number of cells of phosphate in the bones. Vitamin D is the only vitamin that is produced naturally by the human body, while under the light of the Sun. The purpose of this study is to conduct an analysis of the mineral content and vitamin D on bone flour fish yellowfin tuna. The results of mineral content of flour of the highest fish bones found on calcium and phosphorus (222.54; 107.08 mg/kg), while vitamin D with the best value found in the NaOH treatment (0.119 g/ml), whereas citric acid treatment is (0.173 g/ml) and treatment the control value (0.069 g/ml).
Effects of reading dhikr Asmaul Husna Ya Rahman and Ya Rahim against changes in the level of anxiety in the elderly
Authors: Agustina N W , Handayani S , Nurjanah L
Published: May 2020

Many elderly experience anxiety because of something that is not clear. Anxiety can be overcome by dhikr therapy Asmaul Husna Ya Rahman and Ya Rahim. The research design is quasi-experimental. A population of 59 elderly with a sampling technique using purposive sampling. The research sample of 30 elderly. The research instrument was the GAI questionnaire. Data analysis using a paired t-test and Mann Whitney test. The result is a difference in the level of anxiety before and after the intervention in the intervention group with an average decrease of -4.067 (pValue = 0.000). In the control group with an average decrease of -1.333 (pValue = 0.001). Also, there was a difference in the level of anxiety reduction between the intervention group and the control group (pValue = 0,000). The conclusion is there is the effect of reading the dhikr of Asmaul Husna Ya Rahman and Ya Rahim to reduce the level of anxiety in the elderly.
Application of wavelet decomposition in volcanic seismic data
Authors: Dairoh  , Suryanto W
Published: May 2020

Volcanic data is in the form of broadband data that a wide range of frequencies and contains a high level of noise. So that the noise decomposition process must be chosen correctly, it is intended that the volcanic seismic recording data containing event information contained there is not decomposed. For This reason, noise decomposition has been carried out by applying the wavelet process, namely by using wavelet decomposition on the recording data at the Wanagama station during the Merapi volcano eruption 2010. This Decomposition of noise uses Daubechies db 5 level 5 detail 1 wavelet decomposition. Level 5 detail 1 is able to decompose noise well a volcanic event are obtained during the eruption. One of them is the event of deep volcanic event (VT-A), shallow volcanic earthquake (VT-B) and pyroclastic flows that occurred during Merapi eruption on October 26, 2010 and November 3, 2010.
The influence of mathematical basic concept of materials based on internalization of Islamic values against religious attitude
Authors: Ulia N , Sari Y , Yustiana S , Hariyono M
Published: May 2020

This study aims to find out the characteristics of basic mathematics concept teaching materials based on internalization of Islamic values, and to improve students’ religious attitudes through lectures using basic mathematics concept teaching materials based on internalizing Islamic values. The research method used is research development. Data collection techniques used were non-test techniques in the form of questionnaires. Analysis of the data used includes the validity of teaching materials analysis, practicality analysis of teaching materials, effectiveness analysis of teaching materials, descriptive statistics, and Gain normalization test. Learning using basic mathematics concept teaching materials based on internalizing Islamic values can improve students’ religious attitudes shown from the results of the initial questionnaire given an average score of 70.22% while the final questionnaire provided an average score of 87, 32%. An increase of 0.58 in the medium category based on the normalized gain test. From the results of the study, it is expected that the existing religious attitudes are more explored through learning and habituation. Because the lecturer is only a facilitator, certainly in improving religious attitudes the teacher is not centered, but it must be student centered.
Fuzzy-PI algorithm application to controlling servo motor position using microcontroller AVR
Authors: Rahmat  , Wiyono
Published: May 2020

Understanding implementation of control process in real application is not easy for common student that their study of control application. This research purpose to describe how algorithm Fuzzy-PI implementation in control position servo motor. Realisation of this research using circuit of microcontroller with before programmed with algorithm fuzzy-pi and then implemented to control rotation position servo motor. Method and step of process the research start with make module circuit microcontroller as circuit controlling servo motor position, and then make script program for to upload to circuit microcontroller. After that do experiment for get data with entry several parameters Fuzzy and PI and analysed result experiment. From result of experiment using microcontroller as controlling servo motor with fuzzy algorithm result controlling to arise very fast to state of stability. With using fuzzy algorithm parameter of Kp and Ki with autotune at optimum value. Result from this research a prototype device for experiment facility students for understanding algorithm Fuzzy PI in the real device and make easier for learning and understanding concept control system application in a device electronic.
Using 3D animation combined with augmented reality for promotion media: Case study of STMIK Bina Patria
Authors: Priyoatmoko W , Arifah F N
Published: May 2020

STMIK Bina Patria as the first computer academy in Magelang, prepares students to have competitive advantages and improving added value in the field of Science and Technology. Since the establishment of STMIK Bina Patria in 1999, this institution has experienced significant progress, seen from the increasing number of students and improvement of the infrastructure to support teaching and learning activities. Brochures and billboards are used for promoting the campus. But the impact is far from its expectation. Seeing these conditions, improvement is needed to intensify media promotion functions at STMIK Bina Patria. Therefore, the researcher constructs Augmented Reality 3D animation of STMIK Bina Patria. Augmented reality (AR) is constructed using Multimedia Development Life Cycle (MDLC) research method consisting of Concept, Design, Material Collecting, Assembly, Testing and Distribution. Constructing begins by taking pictures, followed by designing STMIK Bina Patria building using Blender software. Unity and Vuforia Library software are used to design the AR application. The results of this study are Augmented Reality introduction media Application of S TIMIK Bina Patria Magelang which can be run on an Android. By using this media, it is expected that people are more interested in studying at STMIK Bina Patria.
Three-phase electric motor isolation diagnosis modelling caused unbalance voltage using radial basis function network
Authors: Sahrin A , Purnomo M H
Published: May 2020

One of the Diagnoses of three-phase electric motor isolation is caused by unbalanced voltage. The National Electrical Manufacturers Association (NEMA) standard for unbalanced voltage is 1%. The diagnosis of electric motor isolation is too complex to be modelled in mathematical form. Therefore, this paper proposes to model the electric motor isolation caused by unbalanced voltage using the Radial Basis Function Network (RBFN). RBFN is implemented for training and testing data with input variations number of unbalanced voltages, running hours, voltage, current, temperature, rotation speed, and output variations number of insulation resistance. The modelling process is comparing the number of neurons and the learning rate to get accuracy and speed of time. The results of modelling using RBFN obtained Mean Square Error (MSE) of 7.86E-14 and this method is very well applied for diagnosis of three-phase electric motor isolation modelling caused unbalance voltage.
Enhancement of solar photovoltaic using maximum power point tracking based on hill climbing optimization algorithm
Authors: Ulinuha A , Zulfikri A
Published: May 2020

The voltage generated by solar photovoltaic depends on sunlight intensity. Since the direction of sunlight changes during a day, it causes changing of sunlight intensity leading to voltage reduction. To maintain the voltage, the panel must be directed so that it stays facing toward the sun to get maximum light intensity. The algorithm of Hill Climbing is employed to search the most optimal panel position that enables providing maximum voltage. This algorithm explores and saves the most optimal condition and updates it if new situation takes place. The algorithm is implemented in a Maximum Power Point Tracking (MPPT) system that continuously directs the panel to generate maximum voltage. An Arduino microcontroller is employed to interpret the algorithm that instructs DC Motor to set the most optimal panel position. A set of current and voltage sensors is used to measure and provide feedbacks to the controller. The system is implemented on a 50 WP solar panel that enables providing higher power compared with that without MPPT. Since the microcontroller and actuator also consume power, this should also be taken into account. Inclusion of this additional power still makes the system provide net power higher compared with that without MPPT.
Implementation of AES cryptography and twofish hybrid algorithms for cloud
Authors: Santoso K I , Muin M A , Mahmudi M A
Published: May 2020

Data exchange is an inevitable issue in this digital age. Especially data in a cloud system. The data must be secured so as not to be abused by people who are not entitled to. Algorithms to secure data is already widely known. It would be more secure if data security combines at least two algorithms for Cryptography. The goal is to strengthen the results of the data encryption in the case will be hacked, unauthorized people. This research will incorporate two Cryptographic Algorithms, namely AES (Advanced Encryption Standard) and Twofish with 256 bits key generated by the HASH function SHA 256. This new algorithm will give more security to the data uploaded or downloaded in the Cloud system.
Microwave heating as an alternative lifting method for the heavy oil deposits
Authors: Indriani E , Purnomosidi
Published: May 2020

In providing solution for lifting the viscous oil which is immensely concerned in mature field, thermal recovery is commonly applied to recover the oil with API gravities approximately 20 0API by using steam injection and in situ combustion. It had been the way out to lower enough the viscosity so that the oil would flow toward more effortless than the viscous one for the recent times. Applying electromagnetic microwave to heat up the reservoir can overcome the depth limitation which is often found in conventional thermal recovery methods. This method uses the Nano-ferro fluid as a stimulant that conveniently radiate heat in a reservoir. It is important to analyse the brine formation in affecting the optimization of thermal period while the Nano-ferro fluid being directly introduced to formation fluid. Therefore, NaCl solution becomes variable which was used to represent brine formation in investigating the heating time of saturated artificial cores. Meanwhile optimal concentration of Nano-ferro had been recognized. The microwave was also varied in sequence of power, 378-Watt, 468-Watt, 657-Watt, 792 Watt, and 900 Watt. For example, applying 50,000 ppm, 100,000 ppm, and 350,000 ppm in performing investigation that would give significant performance while thermal process. When 657 Watt was set to heat up the compartment contained artificial core, the temperature could reach up to 90 °C in 110 seconds, 82 seconds, and 54 seconds consecutively from low to high NaCl solution. In that way, the sensitivity of this variable was proved that NaCl solution greatly affect the temperature increment in times. Furthermore, this research can be considerable study in finding out the behaviour of formation fluid which contribute in optimizing for Nano-ferro fluid thermal recovery.
Dynamics of fluctuations in the Gaussian model with dissipative Langevin Dynamics
Authors: Corberi F , Mazzarisi O , Gambassi A
Published: May 2020

We study the dynamics of the fluctuations of the variance s of the order parameter of the Gaussian model, following a temperature quench of the thermal bath. At each time t, there is a critical value s

c
(t) of s such that fluctuations with s > sc

(t) are realized by condensed configurations of the systems, i.e., a single degree of freedom contributes macroscopically to s. This phenomenon, which is closely related to the usual condensation occurring on average quantities, is usually referred to as condensation of fluctuations. We show that the probability of fluctuations with s < inft[sc

(t)], associated to configurations that never condense, after the quench converges rapidly and in an adiabatic way towards the new equilibrium value. The probability of fluctuations with s > inft[sc

(t)], instead, displays a slow and more complex behavior, because the macroscopic population of the condensing degree of freedom is involved.

A post-publication change was made to this article on 4 Jun 2020 to correct the title on the webpage.
Opto-Electronic properties of BN-ring insertions in Circumacenes: the case of Coronene and Ovalene
Authors: Mocci P , Cardia R , Bosin A , Cappellini G
Published: May 2020

We report a comparative computational analysis on the electronic and optical properties of some emblematic carbonaceous planar molecules after BN substitutions. In particular, we focused on Coronene (C24H12) and Ovalene (C32H14) molecules (belonging to the Circumacenes family) after different hexagonal-Boron-Nitride-ring insertions. We have performed all-electrons Density Functional Theory and Time Dependent DFT calculations using a localized Gaussian basis-set combined with the hybrid exchange-correlation functional B3LYP. For all the systems, we calculate the main molecular electronic and optical properties and we discuss if the mixed C-BN-ring-substituted clusters could be a potential attractive alternative or integration with respect to their C-made compounds, for both fundamental and application research.
Analysis in reciprocal space of the band-pass filter effect in uniform and non-uniform grating couplers
Authors: Zagaglia L , Floris F , Brien P O’
Published: May 2020

A detailed study on the origin of the bandwidth reduction in the Coupling- Efficiency (CE) spectrum for non-uniform grating couplers (nu-GCs) due to a band-pass filter effect is reported. This effect is deeply investigated through Finite Difference Time Domain simulations (FDTD) in order to look at the spatial Fourier Transform (sFT) of the nu-GC’s emission, which gives the energies and the wavevectors sustained by the overall structure. We show: how to evaluate the bandwidth from the sFT and how the band-pass filter effect arises from the sFT affecting the CE spectrum giving a physical insight on the bandwidth’s reduction. Moreover, we also point out how the concept of photonic crystal bandstructure can be applied for such nu-GCs and used as a powerful tool to describe the dispersion of the light inside these non periodic structures. Finally, both the sFT and the bandstructure approaches are shown to give the same outcomes in terms of the bandwidth evaluation and to be in agreement with the CE spectra’s behaviours. The entire analysis is proposed also for uniform-GC in order to directly compare the two different types of structures.
The poor man’s magnetohydrodynamic (PMMHD) equations
Authors: Alberti T , Consolini G , Carbone V
Published: May 2020

We present a mathematical derivation of a discrete dynamical system by following a Fourier-Galerkin approximation of the 3-D incompressible magnetohydrodynamic (MHD) equations. In this way, a 6-D map, depending on 12 bifurcation parameters, is derived as a truncated set of nonlinear ordinary differential equations (ODEs) to characterize incompressible plasma dynamical behaviors, also conserving total energy and cross-helicity in the ideal MHD approximation. Moreover, three different subspaces, associated with long-living non-trivial solutions (e.g., fixed point solutions), have been found like the fluid, magnetic, and the Alfvenic fixed points. Our set can be seen as a Lorenz-like model to investigate MHD phenomena.
Spin-orbit interaction near the neutron drip line and shell effects at N = 82 near the r-process path
Authors: Alabbar A. N. , Sharma M. M.
Published: May 2020

We have studied the behavior of charge and neutron radii across the shell-closure at N = 82 near the neutron dripline in a comparative approach which includes Relativistic Mean Field (RMF) Theory and the nonrelativistic Skyrme-Hartree-Fock (SHF) Theory. We have investigated the extent and the effects of the spin-orbit interaction on the ground state properties of neutron-rich nuclei in the extreme region. RMF and SHF calculations have been performed for nuclei in the isotopic chains from Kr (Z = 36) to Sn (Z = 50) near the neutron dripline across the magic number N = 82. We present the results of shell-effects on charge radii, neutron radii, and the neutron skin thickness. We have examined the single particle energies (SPE) in the context of the kinks in the radii. It is shown that RMF theory produces a kink in charge radii, similar to what was seen experimentally for Pb (Z = 82) isotopic chains. This is in contrast to the Skyrme forces, which do not produce such a kink.
Consistent analysis of deuteron interactions at low and medium energies
Authors: Avrigeanu M. , Avrigeanu V.
Published: May 2020

An extended discussion of the deuteron-induced reactions concerning full parametrization procedure as well as consideration of the theoretical models associated to the deuteron interaction process is carried out. The key role of direct interactions, i.e., breakup, stripping and pick-up processes is stressed out by comparison of the available experimental data with theoretical and evaluation predictions.
Triaxiality-related nuclear phenomena in the A ≈ 100 mass region
Authors: Timár J. , Kruzsicz B. , Kuti I. , Sohler D. , Molnár J. , Nyakó B. M. , Chen Q.B. , Zhang S.Q. , Meng J. , Joshi P. , Wadsworth R. , Starosta K. , Koike T.
Published: May 2020

Solid experimental evidence for triaxial nuclear shape is difficult to obtain and is quite rare. Such evidence can be provided by the phenomena of chiral rotation and wobbling motion, as these can occur only in triaxially deformed nuclei. Although nuclear chirality is well documented in different mass regions, experimental evidence for multiple chiral bands as well as for wobbling motion has been reported so far only in a few nuclei. Pd and Rh nuclei in the A ≈ 100 mass region have been recently studied, and transverse wobbling motion as well as multiple chiral band structures were identified for the first time in this region. These observations provide experimental evidence for the predicted triaxial shape in this mass region, and new data which enable a better understanding of the studied phenomena.
Neutron transfer in reaction 18O + 181Ta with formation of neutron-rich oxygen isotopes
Authors: Penionzhkevich Yu E , Lukyanov S M , Azhibekov A K , Naumenko M A , Issatayev T , Kolesov I V , Maslov V A , Mendibayev K , Zernyshkin V A , Kuterbekov K A , Mukhambetzhan A M
Published: May 2020

Differential cross sections for the formation of oxygen isotopes in the reaction 18O + 181Ta have been measured at projectile nucleus energy 10 A⋅MeV on the high-resolution magnetic spectrometer MAVR. Theoretical analysis of product yields has been performed in the finite-range distorted-wave Born approximation formalism using the FRESCO code under the assumption of sequential neutron transfer mechanism. The results of calculations are in good agreement with experimental data.
Controls of the transient climate response to emissions by physical feedbacks, heat uptake and carbon cycling
Authors: Williams Richard G , Ceppi Paulo , Katavouta Anna
Published: May 2020

The surface warming response to carbon emissions is diagnosed using a suite of Earth system models, 9 CMIP6 and 7 CMIP5, following an annual 1% rise in atmospheric CO2 over 140 years. This surface warming response defines a climate metric, the Transient Climate Response to cumulative carbon Emissions (TCRE), which is important in estimating how much carbon may be emitted to avoid dangerous climate. The processes controlling these intermodel differences in the TCRE are revealed by defining the TCRE in terms of a product of three dependences: the surface warming dependence on radiative forcing (including the effects of physical climate feedbacks and planetary heat uptake), the radiative forcing dependence on changes in atmospheric carbon and the airborne fraction. Intermodel differences in the TCRE are mainly controlled by the thermal response involving the surface warming dependence on radiative forcing, which arise through large differences in physical climate feedbacks that are only partly compensated by smaller differences in ocean heat uptake. The other contributions to the TCRE from the radiative forcing and carbon responses are of comparable importance to the contribution from the thermal response on timescales of 50 years and longer for our subset of CMIP5 models and 100 years and longer for our subset of CMIP6 models. Hence, providing tighter constraints on how much carbon may be emitted based on the TCRE requires providing tighter bounds for estimates of the physical climate feedbacks, particularly from clouds, as well as to a lesser extent for the other contributions from the rate of ocean heat uptake, and the terrestrial and ocean cycling of carbon.
Preface: The 1st International Conference on Genetic Resources and Agricultural Biotechnology: “Information system and exchanges of genetic resources for effective crop improvement”
Authors: Lestari P , Sabran M
Published: May 2020

The First International Conference on Genetic Resources and Agricultural Biotechnology (The 1st ICGRB) was held in IPB International Convention Center on 20–21 August 2018, Bogor, Indonesia. The theme of the conference was “Information system and exchanges of genetic resources for effective crop improvement”. This conference facilitated the share and exchange of ideas, information and achievements on the management and utilization of plant genetic resources supported by biotechnology among researchers and academicians. This 1st ICGRB was also expected to result in bright ideas that will trigger international collaboration to resolve global agricultural challenges, in particular Indonesian challenge toward a sustainable bio-industry agriculture. Twelve invited speakers (Indonesia, Italy, Switzerland, Japan, Iran, USA, UK, South Korea and Singapore) shared their knowledge and experience with interactive discussion. In addition to Indonesian scientists, this event was successfully attracted approximately 150 participants coming from around seven countries joined in the plenary and parallel sessions as well as two consecutive international workshops. A total of 80 oral presentations on many crops with varied research areas were delivered in the conference by participating scientists. This conference was very useful in promoting and enhancing the applied technologies and related regulations on genetic resources exchange for crop improvement.
PhilRice Genebank: recent developments in managing and sharing the Philippine rice germplasm
Authors: Ferrer M C , Duldulao M D , Caguiat X G I , Mananghaya T E , Newingham MCV , Nombrere JMZ , Castro JR , Alfonso D O , Regalario J B , Alvarino J B M , Pacada I G , Niones J M
Published: May 2020

The Genetic Resources Division (GRD) of PhilRice collects and conserves rice genetic resources to ensure the future generations of available seeds needed to build better rice plants in facing climate change and growing population. At present, GRD maintains the national collection of rice genetic resources with 7,129 accessions. To effectively manage the germplasm collection, the search for, development of, and implementation of the best conservation strategies and innovation in technology have been the utmost priority of the GRD. Thus, georeference data such as latitude, longitude and elevation of germplasm origin during collecting mission were recorded using a handheld global positioning system (GPS) receiver. The e-Seedfile software was developed to provide virtual access of the reference collection for regenerated germplasm seed verification and valid type confirmation for new and old germplasm collection. Barcoding, on the other hand, facilitated accurate inventory of seed stocks, making the distribution and regeneration of germplasm more efficient. Moreover, paperless data collection using android application was implemented for immediate data validation and accurate data downloading from tablets to workstations, making it an ideal tool for germplasm characterization. Furthermore, the current database system was upgraded and adjusted to adopt the use of digital object identifier (DOI) through registration to the global information system (GLIS) on Plant Genetic Resources for Food and Agriculture (PGRFA). The DOI allows the use of material to be tracked, thus meeting the legal obligations of the SMTA and monitor the impact of genebank collections in utilization in research and breeding programs. These innovative technologies are of great importance to expand the toolbox for the management and conservation of the germplasm collection that will help enhance the long-term conservation of rice diversity and easy access to germplasm and germplasm-related information.
Digital object identifier (DOI) application for rice germplasm collection at Yogyakarta AIAT
Authors: Widyayanti S , Kristamtini  , Sudarmaji
Published: May 2020

In 2014, local rice exploration survey identified 76 local rice accessions from Yogyakarta. These local rice collections have been stored in Yogyakarta AIAT cooler facilities. Yogyakarta AIAT has assigned the digital object identifier (DOI) to 55 of its local rice collections. The assignation of DOI will be useful for the local rice collection for their availability for transfer with the Standard Material Transfer Agreement (SMTA) in the Multilateral System (MLS) of Access and Benefit-Sharing (ABS) of the International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA).
Yield stability and agronomical performance of inland swamp rice lines developed using molecular breeding
Authors: Utami D W , Rosdianti I , Khairullah I , Sinaga P , Subardi  , Muarepey A
Published: May 2020

Yield stability of rice varieties in diverse locations is an important aspect in a varietal recommendation to ensure better economic benefits for farmers. Multi-location trials in different locations or seasons will identify consistently high-performing varieties. This study aimed to test the yield stability of selected promising lines previously developed by means of Marker-assisted Breeding. Field trials were conducted in three different types of swampland locations: Lampung, South Kalimantan and Riau. The experiments were carried out in a randomized complete block design with three replications. A total of 15 selected rice lines were evaluated. Seedlings were transplanted to 2 m × 5 m plots with 20 cm × 20 cm planting distance. Yield stability was estimated using various analyses that measure coefficient of variability (Cvi), coefficient of regression (bi), deviation parameter (δ2), coefficient determination (Ri2) and AMMI biplot. Combined analysis of variance showed that line effect (G), environmental effect (E), and G × E interaction were statistically significant different. Using CVi25% and bi<1 threshold followed by AMMI biplot analyses, four lines (line number 1, 4, 6 and 11) were classified as having broad stability. Five lines (line number 5, 12, 13, 14 and 15) showed less yield stability but had better adaptation in tidal swamp environment. The other two lines (line number 3 and 7) showed a greater yield in the coastal swamp area, suggesting their potential as adapted lines suitable to this swampy environment.
Application of induced mutation technique to improve genetic variability of Indonesian traditional rice varieties
Authors: Dewi A K , Dwimahyani I , Sobrizal
Published: May 2020

The development of rice genotype is vital to guarantee food security to cope with global climate changes and increasing population growth. Biodiversity is spread throughout the Indonesian archipelago. Many Indonesian local varieties are resistant to biotic and abiotic stresses that may be useful for rice breeding program. They are well-adapted to specific environment and have good aroma and eating quality, but have some weaknesses, such as late maturity, susceptible to lodging, unresponsive to fertilizer and low yield. Induced mutation breeding is useful for increasing genetic variability to develop genotypes with several interesting agronomical characters and yield. Center for Isotope and Radiation Application, National Nuclear Energy Agency (CIRA-NNEA) has been conducting the induced mutation technique for genetic improvement of rice. Pandan Putri, an early maturing mutant variety that was derived from irradiated Pandan Wangi variety from Cianjur area, is one of successful improvements of traditional rice varieties using mutation technique. The other success stories are described in this paper. It is concluded that nuclear technology can be applied for induced mutation breeding to improve several agronomical traits.
Improvement of Inpari 30 and Situ Bagendit rice varieties for tolerance to drought through spike-stalk injection method
Authors: Prasetiyono J , Fatimah  , Trijatmiko K R , Sustiprijatno  , Ma’sumah  , Nafisah  , Supriyanta
Published: May 2020

Extreme climate change requires rice varieties adaptable to drought condition. Adaptation will play an important role in ensuring the sustainability of food security. This research aimed to improve drought tolerance of Inpari 30 and Situ Bagendit varieties through Spike-Stalk Injection Method (SIM). DNAs from several plant species, such as rice (cv. Cabacu), grasses (Echinochloa crusgalli/E. colona, elephant grass/Pennisetum purpureum, Bothriochloa pertusa, Cenchrus echinatus, Sorghum nitidum, Ischamemum timorensis and Guinea grass), sugarcane, wild rice (Oryza nivara), maize and sorghum were injected to tillers of cultivar Inpari 30 and Situ Bagendit. The first set of M1 Situ Bagendit-SIM and M1 Inpari 30-SIM seeds were treated with 20% of PEG 8000 solution for 10 days. Some of the well germinated seeds were planted in pots and maintained untill harvest. The selected M2 Situ Bagendit-SIM and M2 Inpari 30-SIM and the second set of M1 Situ Bagendit-SIM and M1 Inpari 30-SIM seeds were planted at Muara Experimental Station, Bogor (West Java). The result of PEG 8000 assay showed that M1 Situ Bagendit-SIM-elephant grass, sugarcane and O. nivara had significantly longer radicle length and higher fresh weight compared to Situ Bagendit, while M1 Inpari 30-SIM-sugarcane, sorghum and elephant grass had significantly longer radicle and plumule length, and higher radicle weight compared to Inpari 30. Field trial showed that the mutant lines of Situ Bagendit-SIM performed better than those of Inpari 30-SIM. The grain weight of M1 Situ Bagendit-SIM-Cabacu, jajagoan grass, maize, sugarcane, O. nivara and B. pertusa, and M2 Situ Bagendit-SIM-O. nivara and elephant grass were higher than that of Situ Bagendit. The grain weight of M1 Inpari 30-SIM-jajagoan grass was also higher than that of Inpari 30. Therefore, SIM could be an alternative way to develop genetic variation of rice plant.
Soil biology characteristics of oil palm land endemic to Ganoderma after four years conversion to sugarcane
Authors: Eris D D , Widiastuti H , Taniwiryono D
Published: May 2020

Basal stem rot disease is the primary disease in oil palm production. One of the control methods to keep the disease severity low is through crop rotation by planting non-host crops for a certain period to reduce the pathogen population. This study aimed to evaluate the biological and molecular characteristics of Ganoderma endemic land after converted to sugarcane for four years. Results showed that the total abundance of bacteria in the land ranged from 3.5 × 102–6.1 × 108 CFU/g, whereas phosphates solubilizing bacteria, was in the range of 101–1.0 × 106 CFU/g and N fixing bacteria was 101–2.4 × 104 CFU/g. The genus dominated mycorrhizal fungi from Glomus and Acaulospora with spore population of 1 to 135 spores per 25 g of soil. Another soil biota analyzed was Trichoderma sp. that had population range between 102 to 105 CFU/g. Based on PCR analyses using specific primers Gan2 and Gan3, Ganoderma fungi were still detected in selected soil samples and the remaining roots in the field. Nevertheless, the productivity of sugarcane up to 4 ratoons remained high, i.e. more than 90 t/ha.
The utilization of local chili variety of Saha Isu as toiletries in West Nusa Tenggara
Authors: Fitrahtunnisa  , Mokhtar M S , Rahmatullaila
Published: May 2020

Chili is commonly used as spice, seasoning, and could help health promoting. Interestingly, a local variety (Saha Isu) from Bima District has been preferred for toiltetries material by indigenous people because of beneficial for headache therapy. The study aimed to know the use of a local chile variety of Saha Isu as toiletries by Bimanese. This study is a qualitative research technique which was done by interview on local people/community and observation of Saha Isu variety in Mpuri Village. These chili have been cultivated from generation to generation decades ago and not distributed yet to other places. In this village, chili was used as shampoo and body scrub material by smoothing and mixing it with grated coconut and a little water. The filtered liquid and remaining dregs were used as shampoo and body scrub, respectively. Total pieces of chili used usually in odd numbers depending on to spiciness level accepted and the availability. In addition to man health, this chili is good for pregnant women and after delivering baby to help control their blood pressure. Based on morphology, Saha Isu has strong spicy-aroma of fruit, dark green young fruit and turned to orange on mature fruit. This preliminary observation need further research on biochemical compound and molecular characterization to enrich the reference about Saha Isu information This traditional knowledge of Saha Isu is important for genetic resources preservation and conservation, and should be a part of activity and responded by institutional participation in Indonesia.
Fuzzy feed forward neural network (FFFNN) model for the Jakarta Islamic index (JII) forecasting
Authors: Irsalinda N , Astuti Y S , Sugiyarto
Published: May 2020

Feed Forward Neural Network (FFNN) model is the best model to forecast the time series data. In this research, The Fuzzy Feed Forward Neural Network (FFFNN) with backward propagation method is used to predict the Jakarta Islamic Index (JII) data time series in 2018. Fuzzy is used as input to the FFNN model because it is overcome the weaknesses of the inaccurate results of the FFNN when the data is unclear or incomplete. The purposes of this research are to explain the procedure to generate the FFFNN model. The steps of the FFFNN model prepare the input data to become a fuzzy number using Growth-S Curve fuzzification; the second is divide the data into two training and testing data, the third is determining the best neural network architecture with different neurons and hidden layers to get the best weights that used for the forecasting model. In this research, the best FFFNN model is built by 19 neurons and one hidden layer with 90% and 10% training and testing data, respectively. Therefore with the model obtained, forecasting produces the value of MSE 0.0018 in training and 0.0004 in testing. From the MSE values obtained, it can be concluded that the forecasting using FFFNN model is reasonable to predict.
Spatial behavior pattern of visitors in City Park Case study: Flora and Bungkul Park, Indonesia
Authors: Dharmawan V , Rachmaniyah N
Published: May 2020

Abstract. Knowledge of park visitor behavior needs to be owned by architects or public facilities designers. This is so that they can predict how visitors will behave in the park they designed. On the other hand, research on the behavior of park visitors is still rare in Indonesia. This research was located in Taman Bungkul and Taman Flora Surabaya-Indonesia and aimed to observe behavior patterns of park visitors. The research uses a qualitative descriptive approach, with behavior mapping techniques whose data are mostly obtained from direct observation in the field. Behavior mapping identified visitor’s position, elements and facilities of the park, and the time they spend in the park. The results of the observations revealed that park facilities acted as a prominent stimulus to visitors’ behavior pattern, and there was interelation between city park facilities and spatial behavior pattern. In addition, it was also found that the strength of stimulus changed time to time depended on density in the park.
The effect of adhesive type and speed pan granulator on the properties of urea slow release fertilizer
Authors: Pamungkas R B , Jos B , Djaeni M , Afridha N S
Published: May 2020

The application of slow-release fertilizer (SRF) to agriculture provides many benefits. Productivity increases and at the same time, negative impacts decrease. This type of slow-release matrix fertilizer offers an excellent solution for increasing nutrient uptake by plants and restoring agricultural land. The objectives of this research are to study the effect of the type of adhesive and the rotational speed of the granulator on the physical properties of urea slow-release fertilizer (USRF). There are four characteristics used as responses, namely; bulk density, water absorption, granules yield, and durability. The granulation process is carried out using a disc granulator. The study was conducted using one factor at a time method. Research has been carried out by varying the rotation speed of the granulator 5 to 25 with a range of 5 rotations per minute on five adhesives, namely; tapioca flour, glutinous rice flour, rice flour, sago flour, and corn flour. The results showed that the types of adhesives affect the values of bulk density, water absorption, granules yield, and durability. The best type of adhesive is tapioca, however, USRF tapioca adhesive has weakness on water absorbency. Increasing the rotational speed of the granulator causes an increase in the value of bulk density, water absorption, and granules yield while the endurance parameters decrease.
Effect of coconut-shell ash as filler and plastic bottle as substitution of porous asphalt mixture
Authors: Syammaun T , Meillyta  , Yati R
Published: May 2020

Generally, porous asphalt mixtures are having low stability and highly dependent on the quality of asphalt as an aggregate binder, so the innovation of using additive needs to be examined to produce high quality asphalt. In this study, the additive used in asphalt mixtures is plastic bottle waste (Polyethylene Terephthalate/PET) and the use of coconut-shell ash (CS) as filler. This study aims to find out the influence of using PET waste and CS in asphalt porous mixtures which meets its parameter of Cantabro Loss (CL), Asphalt Flow Down (AFD), Marshall and permeability test on 60/70 asphalt penetration. Its benefit is to discover the influence of adding PET and ATK. In this research, the variation of asphalt content was made to obtain Optimum Asphalt Content (OAC) of 4.5%, 5.0%, and 6.0%. Australian Asphalt Pavement Association (AAPA) method was used to determine OAC including CL, AFD, and Void in Mix (WIM) test. After OAC was determined, OAC specimen with the variation of 0%, 2%, 4% and 6% PET substitute on asphalt weight, and the use of 50% combination of CS and portland cement from the total weight of filler were made. At OAC value of 5.74%, it is obtained that the value of CL, AFD, Marshall and permeability which meet the AAPA specifications is in the addition of 2% and 4% PET in PA mixture.
Immunostimulating effect of sweet potato fiber extract on IgM production by HB4C5 cells
Authors: Kumalasari I D , Sugahara T , Nishi K
Published: May 2020

Sweet Potato (Ipomea batatas) is a local tuber potentially to be developed as functional food. The aims of this research is to evaluate the immunomodulatory effect of the sweet potato fibre extract (SFE) in vitro by animal cell culture techniques and identification the active compounds of SFE. SFE were prepared by autoclaving the sweet potato fiber powder in distilled water with room temperature 25 °C for 2 hours in distillated water and dialyzed with membrane with molecular weight cut off 14 kDa and 30 kDa. The IgM production of SFE against human hybridoma cell line HB4C5 cells was evaluated. The results of this research indicated that SFE stimulated IgM production by HB4C5 cells with heat and dialysis treatments in dose dependent manner. IgM production was increased by SFE with molecular weight more than 14 kDa and less than 30 kDa. The conclusion of this evaluation, SFE facilitated IgM production by HB4C5 cells and revealed that the SFE has positive effects on immunostimulatory activity in vitro.