bluuebunny/crossref_metadata_2025 huggingface dataset:
Public perception in Majalengka (Indonesia) toward citizen science concept
Authors: Aripin I , Hidayat T
Published: May 2020

Public participation in scientific research, known as Citizen Science (CS), is currently becoming a trend that continues to increase in many countries, including Indonesia. The involvement of citizens in helping scientists to collect, identify, and interpret scientific research data can assist researchers in obtaining more accurate findings. Citizen participation in scientific research in Indonesia remains low. The purpose of this study was to describe and analyze the perceptions of citizens in Majalengka (Indonesia) towards Citizen Science Concept (CSC). This research is a descriptive study with a survey method. Questionnaires and interviews were used to collect research data. A total of 105 respondents were involved in this study. Results showed that 67.1% respondents did not know about the CSC, whereas 65.7% respondents did not have adequate scientific research knowledge. However, 71.4% respondents were interested in being involved in Citizen Science project and has a high motivation to become a citizen scientist. This study is expected to contribute to the development of citizen science programs in higher education level.
Testing validity inferences of science motivation questionnaire (SMQ-II) instrument: Rasch-based analysis with Indonesian secondary students
Authors: Aini R Q , Rachmatullah A , Roshayanti F , Shin S , Lee JK , Ha MS
Published: May 2020

Examining science motivation is essential for science learning in the classroom, even more, science motivation is often related to students’ achievement and performance. The test of science motivation has broadly employed and some of the instrument has been translated into a local language where the instrument used. The current study explores the validity evidence of Science Motivation Questionnaire II (SMQ-II) by IRT-Rasch based analysis using Test Analysis Models ‘TAM’ Package v. 3.1-45 in R software from Indonesian context. This study reveals construct validity of SMQ-II instrument based on The Standards for Educational and Psychological Testing using Messick’s (1989) validity theories and construct validity. The data collected from 984 Indonesian middle and high school students. As result, the current study had SMQ-II validity evidence which includes (1) Dimensionality of the instrument using Exploratory Factor Analysis and Rasch-analysis likelihood ratio approach, (2) Expected A Posteriori (EAP) reliability and Weighted Maximum Likelihood Estimation (WLE) reliability, (3) Item fit and item properties, (4) Wright Map using Rasch modeling. The result of construct analysis shows that the instrument was appropriate with a theory where the construct was categorized into five dimensions, all the items of SMQ-II fit the rasch modelling, and the internal reliability of each dimension is categorized as good. In general, the current study suggests that SMQ-II instrument of Indonesian version is adequate to be implemented in Indonesia.
Implementation of education for sustainable development to enhance Indonesian golden generation character
Authors: Amran A , Jasin I , Perkasa M , Satriawan M , Irwansyah M , Erwanto D
Published: May 2020

The study aims to measure the improvement of Indonesian golden generation character after implementation of education for sustainable development (ESD). The data were collected by using the character self-assessment that given to senior high school students in nine provinces spread in the western, central and eastern regions of Indonesia. The instrument was adapted from character education indicators by Ministry of Research, Technology and Higher Education and the combination of sustainable development learning indicators. The result shows that mostly the character aspects of Indonesian golden generation can be enhanced. ESD character model can develop several characters of students but still need more time to enhance student’s critical attitude and creativity. Besides, it can inferred that implementation of ESD in science education, biology, physics, and chemistry subject can be recommended by using several learning models, of which one of them is ESD character model.
Analysis on readability of scientific literacy enrichment book on earth science concept
Authors: Puspaningtyas A A , Hernani  , Suhandi A
Published: May 2020

The gap between Earth Science material on PISA and on the textbook used at school, encourages research related to the development of scientific literacy enrichment book on Earth Science concept that can support and complement the school textbook. As the learning material source that are used independently, the developed scientific literacy enrichment book is required to have good quality texts that suit to student’s reading level. The purpose of this study was to analyse the readability of science book especially scientific literacy enrichment book on earth science context that developed based on scientific literacy competence on PISA 2015. Method on this research was descriptive quantitative with determining main concept on passage as instrument to collect data and Raygor Graph to analyse book’s reading grade level. Passage on instrument were passages without graph, picture, or formula. Data collected included main concept explanation for determining passage readability percentage and difficult words for determining reading level of the passage. Participants that contribute on this research were 7th grade students at one of junior high school in Cilacap distric in Central Java, Indonesia. Data showed that readability percentage of the passage was 56% and categorized as readable. However, it also concluded that the passages were more suitable for 8th grade student’s reading level. It can still be concluded that even though some texts were more suitable for higher class, the developed book was still readable as an enrichment book.
Need assesment for development of inquiry based learning materials using PhET media to enhance students’ science process skills
Authors: Sudewa P H , Nur M , Wasis
Published: May 2020

This study is a preliminary stage on development learning materials using inquiry model and PhET media to enhance junior high school students’ science process skills. The need assessment is aimed to give preliminary understanding in term of curriculum, learning theory, challenge and needs in the future. The data is gathered by observation, interview and documentation methods. Descriptive analysis had been chosen as the data analysis method. The result showed the following facts. First, the implementation of Curriculum 2013 with inquiry learning model and supported by PhET Media is necessary to improve the students’ science process skills. Second, the students need to have competencies in affective learning outcome, psychomotor skills, cognitive product and process skills. Third, the set of learning materials needed are including syllabus, lesson plan, students’ book, students’ worksheet and assessment sheet in density and buoyancy topic for the eight-grade junior high school students of SMP Lab Undiksha Singaraja.
The logic gate board game for promoting intrinsic motivation and understanding in the science museum
Authors: Chantarapimon P , Nokkaew A , Laosinchai P , Wongkia W
Published: May 2020

Mostly, in museums, logic gates were communicated by permanent exhibits. Our logic gate board game was created to be an alternative for communicating the content and developing children’s self-motivation. Three logic gates—AND, OR, and NOT—were embedded in the board game. The main goal was to encourage the children to create their own strategies to complete a mission by using conditions (gates). A fairy tale was used to engage the children to play the game. We investigated children’s understanding and intrinsic motivation after playing the board game. The participants were 21 primary children (grades 4– 6) who participated in a one-day camp at the science museum. They were introduced the rules and the context of the game before playing the game. During the gameplay, their interactions were observed. They were assessed by completing the test and the survey consecutively. Then, a debriefing session was held at the end of the assessment. Some were interviewed to investigate both their understanding and motivation. The results of the survey and interview show the success in promoting the children’s intrinsic motivation particularly, the enjoyment, concentration, and interest. From the observation, it seems that the children were completely focused throughout the game. Besides, most students could develop their understanding of the logic gates through the board game. Supported by the interview result, the children mentioned the strategy they used to complete the mission which required their logical thinking. However, it seems that the children still could not apply knowledge gained from the board game to the real-life problem.
The influence of read, answer, disscuss, explain, and create (RADEC) learning model on the concept mastery of elementary school students on the water cycle topic
Authors: Setiawan D , Sopandi W , Hartati T
Published: May 2020

This study aims to analyse the effect of Read, Answer, Disscuss, Explain, and Create (RADEC) learning models on the concept mastery of elementary school students on the topic of the water cycle. The research used a quasi-experimental method and the participants in this study were 38 students of the experimental class and 39 students of the control class. Data was collected using open ended test items. The pretest scores of the experimental and control classes were 48.02 and 45.67, respectively. After the implementation of RADEC model, the posttest scores of the experimental and control classes were 85.85 and 79.05, respectively. Based on the Mann-Whitney test, the significance value was 0.00 meaning 0.00<0.05. Thus, it can be concluded that the RADEC model has a positive impact, that is, it can improve the concept mastery of elementary school students on the topic of the water cycle.
Computer assisted instruction (CAI)-based learning: instructional need for pupils’ conceptual understanding of water cycle?
Authors: Nurlaili S , Sari D R
Published: May 2020

This study is aimed to identify the Computer Assisted Instruction (CAI) based on learning as an instructional need for students’ conceptual understanding about water cycle. Qualitative descriptive method was used in this study. The data collection used mini interviews and test. Participants were three students average 11-13 years old from different schools. The multimedia-based CAI application used by the researcher to understand pupils’ conceptual understanding of the water cycle is implemented on laptops or desktop computers used Windows operating system. The result showed that pupils’ conceptual understanding of the water cycle are still lack and have many misconceptions can be seen from the results of students’ test when drew water cycle. The sustainable development will be achieved if the instructional needs through improvement of CAI are fulfilled.
Smart edu: smart city in a learning system to build collaborative knowledge on lectures deepening science material
Authors: Zulkarnaen R H , Setiawan W , Rusdiana D , Muslim
Published: May 2020

Technology is created to facilitate human performance. Technology develops every time so it becomes a major need in life. Industry era 4.0 is one example where the existence of technology is the main key in life. In this article we develop the use of technology in learning systems. The Smart Edu program was used as the main project in the development of this research. The research was conducted in lectures on the deepening of science materials with research and development (R & D) methods of the programs developed. The development of this program adapts the transparency of smart cities that can connect the existence of a factual environment into the lecture system. Students, lecturers and even teachers in the field can access this program with a predetermined portion. With the nature of Transparency, this program can build collaboration from these three things so that full learning can be created covering the theoretical and factual sources from the field.
Effect of verbal creativity on problem solving abilities of junior high school students
Authors: Rosidi I , Hidayati Y , Hadi W P
Published: May 2020

The purpose of this study was to determine the effect of verbal creativity on the problem-solving ability of junior high school students. TASC framework learning in environmental material applied in 7th grade. The samples taken were 30 students, 11 male students, and 19 female students. Based on the results, there is an effect of verbal creativity on the problem-solving ability with a significance value of 0.000 (< 0.05) with a contribution of 87.5%. Path analysis shows that each indicator of verbal creativity has a significant effect on problem-solving ability. Learning with the TASC Framework encourages students to develop creative thinking skills and student problem-solving.
Revitalization of Science Teacher Community to Accelerate Competency Achievement of Science Teacher in Urban Area
Authors: Hayu W W R , Permanasari A , Sumarna O , Hendayana S
Published: May 2020

In line with the Industrial Revolution Era 4.0, teachers must also try to improve competencies by the demands of the times. The Science Teacher Community is a very relevant vehicle for building the profession of science education. Descriptive research has been carried out to observe the profile of activity in the Science Teacher Community, from excellence to limitations. The results of the observations can recommend solutions to improve the quality of Science Teacher Community activities to be able to accelerate the achievement of teacher competencies. The study was conducted by distributing open questionnaires to 38 science teachers in the urban area of the Regency. Content questions related to Science Teacher Community activities needed. The results of the study show some weaknesses in Science Teacher Community activities. Most respondents stated that there were time and distance constraints when participating in Science Teacher Community activities. Respondents were able to review their weaknesses in content (about physics), management and pedagogical practices of related content in developing 21st-century skills. They also showed weaknesses in IT usage. The recommended recommendation is to manage the practice of Science Teacher Community activities based on blended learning, focusing on efforts to overcome weaknesses in content and pedagogy content knowledge (PCK).
The effectiveness of Multicultural Education through traditional games-based inquiry toward improving the ability of critical thinking
Authors: Dewi N R , Rizkiana F , Nurkhalisa S , Dwijayanti I
Published: May 2020

The aim of this research is to know the effectiveness of multicultural education through traditional games in science learning based on inquiry learning model for developing the critical thinking ability in Junior High School Students. The research design used in this study was quasi-experimental design with non-equivalent control group design. Data were collected by using purposive sampling method of data collection. It was found that N-gain of experimental class has a higher value than the control class in the fifth aspect of critical thinking. The significance of critical thinking skills of the experimental class gained t-count = 18.712 and t-table = 2.030, while the control class is obtained t-count = 14.355 and t-table = 2.030. t-count > t-table then H0 rejected and Ha accepted. Differences in students’ critical thinking results showed that the average grade in the experiment class higher than the control class with t-test of 5.707 to 1.9944 t-table (df = 70, α = 5%). Traditional game based on multicultural learning is able to encourage a critical attitude because it makes students more flexibility in thinking. It could be concluded that traditional games based on multicultural education can improve critical thinking in the student in all aspects.
Chemical forms of rhodium ion in pure water and nitric acid solution studied using ultraviolet-visible spectroscopy and first-principles calculations
Authors: Watanabe Shinta , Sato Toshikazu , Harigai Miki , Inaba Yusuke , Takeshita Kenji , Onoe Jun
Published: May 2020

We have investigated chemical forms of rhodium (Rh) ion in nitric acid solution by using spectroscopic and first-principles methods, in order to develop the disposal of high-level radioactive nuclear liquid wastes (HLLW). The electronic structure of Rh complexes in both pure water and nitric acid solutions was investigated using ultraviolet-visible (UV-vis) absorption spectroscopy. Comparison with many-electron calculations indicates that Rh ion forms an octahedral bidentate complex coordinated with three nitrate ions, [Rh(NO3)3], in both pure water and nitric acid solutions. This is consistent with thermodynamic prediction. Since the overall feature of UV-vis spectra of the Rh complex remained unchanged in a range of 0-3 M nitric acid solutions, the structure of the Rh complex was found to be stable in the range. In addition, since no significant changes in UV-vis spectra of Rh complex were observed under γ-ray radiation, the Rh complex, [Rh(NO3)3], can be expected to be stable in actual HLLW.
Supramolecular Rare Sugar
Authors: Ishii Tomohiko , Senoo Tatsuya , Taguchi Hiroaki , Sogo Kouta , Huy Bui Quoc , Taniguchi Norito , Katsumoto Syuichi , Nagayama Natsumi , Sakane Genta
Published: May 2020

We introduce rare sugars including their derivatives and supramolecular rare sugars, that have been actively researched at Kagawa University, Japan. Although the rare sugars are special sugars which hardly exist in nature, we has succeeded in mass synthesis of the rare sugars by utilizing biological enzyme isomerization reaction. In addition, the rare sugars have various functions such as blood sugar level suppressing function, cancer cell growth suppressing function, and antibacterial action. In addition, since rare sugars have a large number of hydroxyl groups, they have a possibility for using as devices for expressing various functions by employing them as ligands of transition metal complexes. In recent years, it is successful that we have synthesized the suplamolecular rare sugars (SRSs) from the different types of rare sugars, that is not as simple mixtures but as single crystals having supralattice structure, that can be freely controlled optical rotation. It has been found that the crystal structures of these SRSs mostly follow the Wallach rule, but do not satisfy the Wallach rule especially in the case of D, L-psicose. Therefore, we have investigated the single crystal X-ray structural analyses of SRSs, obtaining the detailed crystal structure data, and analyzed the intermolecular interaction between their sugar molecules in the crystal by means of the DV-Xα molecular orbital calculation. According to our detailed analysis of the research, calculating the intermolecular interaction revealed that the stability of the intermolecular interaction in the crystal can not be explained only by following the simple Wallach rule. Specifically, for example in the case of D, L-psicose, the total energy in a crystal can be stabilized by aligning the polarization vectors of the molecules, and as a result, we have clarified that the SRSs crystal structure can be stabilized, even if it does not follow the simple Wallach rule.
X-ray Absorption Spectroscopy and Its Simulation for Some Disordered Oxide Systems
Authors: Cho Deok-Yong
Published: May 2020

The local structural properties of representative amorphous oxides, ZnO, HfO2, ZrO2, and In2Ga2ZnO7 were investigated by using X-ray absorption spectroscopy and an ab-initio theoretical calculation (FEFF). The X-ray absorption near-edge structures of the amorphous systems were compared with those of their crystalline counterparts, and were interpreted in terms of weakened structural orders (in the case of ZnO, HfO2, and In2Ga2ZnO7) or fundamentally different local structures (ZrO2; monoclinic-like local structure favoured in amorphous phase in contrast to the tetragonal structure in crystalline film).
Systematic First-Principles Calculations of Charge Transfer Transitions of Transition Metal Ions (Sc3+, Ti3+, V3+, Cr3+, Mn3+, Fe3+) in α-Al2O3 with Structural Optimization
Authors: Takemura Shota , Novita Mega , Ogasawara Kazuyoshi
Published: May 2020

In order to calculate the LMCT energies for various trivalent TM ions in α-Al2O3 using realistic model clusters, we performed structural optimization using the CASTEP code and constructed the optimized TMO6
9- and TMAl13O6
30+ clusters (TM = Sc3+, Ti3+, V3+, Cr3+, Mn3+, Fe3+). We obtained the LMCT energies of TM ions by first-principles many-electron calculations using the DVME method. It was found that the differences between the LMCT energies of the optimized clusters and those of the relaxed clusters based on the crystal radii originate from the difference in the multiplet splitting of the LMCT states. The results also indicated that the LMCT energies of transition metal ions in α-Al2O3 can be calculated using small clusters composed of the central TM ion and the first-neighbor oxygen ions.
Water Quality in the Maintenance of Oreochromis niloticus through Environmentally Friendly Biofloc Technology
Authors: Sulistya Dewi Endah Rita , Nugroho Ary Susatyo , Ulfah Maria
Published: May 2020

This Population growth that continues to increase demands continuous availability of food. Aquaculture is one of the sectors of food production which has the highest growth rate in the world. Facing this opportunity, aquaculture is faced with several challenges related to limited natural resources such as water and land, as well as waste water from aquaculture. Furthermore, the application of best aquaculture practices in aquaculture product certification requires environmentally friendly aquaculture practices. Oreochromis niloticus tilapia is a type of freshwater consumption fish and is now a popular pet fish in freshwater ponds in Indonesia. This study aims to analyze water quality in the maintenance of Tilapia through environmentally friendly Biofloc technology. This research method was designed in the form of Research and Development. The results showed that the water quality was proper for pond operation using minimal water exchange, the development of dense microbial populations through the management of microbial populations could control the concentration of ammonia in the water. Bacteria in ponds form biofloc, producing microbial proteins that make it possible to recycle unused feed protein, so as to minimize pollution.
Lattice Relaxation Effects on the Multiplet Energies of Ruby Under Pressure using One-Electron Calculations
Authors: Novita Mega , Cholifah Nur , Ogasawara Kazuyoshi
Published: May 2020

Up to recently, it has been difficult to calculate the multiplet energies of compounds using one-electron approach. Since it only considers one electron and one nuclei, the interaction among the electrons are neglected. Previously we have successfully estimated the 2E→ 4A2 (R-line) levels of ruby at 0 pressure using one-electron approach based on one-electron calculation using the first-principles Discrete Variational-Xα (DV-Xα) method. Here we want to perform similar investigation, not only for 0 pressure but up to 110 GPa. We estimated the lattice relaxation effect due to the Cr3+ substitution and due to the applied pressure by using two different methods i.e., Shannon’s crystal radii and geometry optimizations. Two different types of model cluster consisting of 7 and 63 atoms will be used. The 2E level is estimated by the barycenter of t2g
3 configuration which consists of 4 multiplets.
Optical properties of Co3+doped in α-Al2O3with Considering Lattice Relaxation Effect
Authors: Novita Mega , Nuvitalia Duwi , Cholifah Nur , Ogasawara Kazuyoshi
Published: May 2020

Search of new luminescence materials to improve the current white-ight emitting diode (LED) is still ongoing. Several investigations such as the ion dependence, the host crystal dependence has been done previously. Since we want to get a complete picture of ion-host combination dependence, we investigated α-Al2O3: TM3+. In this work we estimated the optical properties of α-Al2O3doped with Co3+. We constructed model clusters consisting of 7 atoms. The lattice relaxation effects due to the Co3+substitution were calculated using Shannon’s crystal radii method and geometry optimizations in the Cambridge Serial Total Energy Package (CASTEP) method. The one-electron Discrete Variational-Xα (DV-Xα) method was used to estimate the molecular orbital energies, while the many-electron Discrete Variational Multielectron (DVME) method was used to estimate the d-d absorption spectra. Since Co3+belongs to 3d6configuration, there are two possible spin statesi.e., high-spin (HS) and low-spin (LS) states.
Study of LCAO-MO calculation by using completely numerical basis functions
Authors: Nakagawa Katsumi
Published: May 2020

Choice of basis functions is decisive in LCAO-MO method to calculate accurately MOs of a molecule under complicated electric/magnetic potential. For such situation, calculating basis functions analytically is generally difficult. To obtain them, the new numerical calculating method based on matrix operation and the new sample point system based on FCC lattice were proposed. Further LCAO-MO calculation using basis functions calculated by this method was applied for small molecules under inner electric potential and showed reasonable results. Finally, two challenges to apply this method for arbitrary magnetic potential are clarified.
The magnetism change by Jahn-Teller distortionin octahedral hexa-coordinate complex
Authors: Oguma Takeyoshi , Tsuneda Dan , Tsutsumi Yuki , Fujikawa Yoshiki , Nakano Momoe , Ishii Tomohiko , Sakane Genta , Ogasaware Kazuyoshi
Published: May 2020

Metal complexes exhibit significant physical properties such as electrical conductivity, magnetism and optical properties. They can be controlled by changing the ligand field splitting of the d-orbital of the central metal ion. We have investigated the reversible spin crossover (SCO) phenomenon by changing the ligand field splitting in six-coordinated metal complexes ML6. In this study, we focused on the change of the spin states by uniaxial Jahn-Teller distortion in the case of an octahedral hexa-coordinated metal complexes ML6, involving two types of different ligand molecules. In addition, we have used DV-Xα and DVME methods in order to calculate the electronic states. In order to reproduce the effect of the Jahn-Teller distortion in the calculation, a uniaxial anisotropic distortion has been applied into the octahedral hexa-coordinate metal complex. The purpose of this research is to study the mechanism and phenomenon of the spin state changing by discussing the calculated electronic states of the spin crossover phenomenon.
Prediction of emission energy of Cr3+ in oxides based on first-principles calculations and machine learning
Authors: Hori Tsubasa , Ogasawara Kazuyoshi
Published: May 2020

The first-principles calculations of the energies of the emission level (2Eg) of Cr3+ in 10 oxide crystals were performed using the first-principles configuration-interaction calculations. In order to improve the accuracy of the prediction, a machine learning model was created by using the results of the first-principles calculations and the experimental 2Eg energies as the training data. The predicted values using this model showed good correlation with the experimental values, where the correlation coefficient is 0.92. The obtained predicted model indicated that the Cr 3d component of t2g molecular orbital is the most important quantity for prediction of the 2Eg energy.
Considerarion of Superatomic Hibrid Orbital in superatom M@Al12 (M = Be, Mg, Ca, Sr)
Authors: Toba Teruyuki , Yamasaki Masaya , Ishii Tomohiko , Sakane Genta
Published: May 2020

We introduce a superatom, which is regarded as a modern alchemy and has been studied around the world. The superatom is a nanocluster composed of multiple atoms, for example Al13. Very interestingly, the “superatom” can mimic the chemical properties of “atom”, for example, the superatom Al13 exhibits the character of halogen atom, such as Cl. If this superatom is synthesized to an appropriate size freely, there is the possibility to be placed as an “artificial atom” in a three-dimensional periodic table, such as the conventional two-dimensional periodic table. In recent years, the exhaustion of rare metals has become a big problem, so that in the next generation of materials and devices, the superatom play as an important role, and it is expected to be used for various materials or as a substitute for expensive metal catalysts such as Pt. From these points of view, the superatom have been studied all over the world up to now, but there is not much studies on their electronic structures. Therefore, in this study, we have analyzed the electronic states of the chalcogen-encapsulated type superatom M@Al12 (M = Be, Mg, Ca, Sr) by means of DV-Xα molecular orbital calculation. Our research revealed that the electronic configuration of the superatom, which changed only the central atom, depends largely on the kind of doped atom. And we can also confirm the “superatomic hybrid orbitals (SAHOs)” composed of superatomic orbitals (SAOs), and chalcogen characteristics.
Generation of two-dimensional spectrochemical series in tetrahedral complexes
Authors: Yamamoto Takuhiro , Oguma Takeyoshi , Tsutumi Yuki , Tsuboi Shino , Ishii Tomohiko
Published: May 2020

The physical properties of metal complexes that exist in many places are due to the ligand field splitting and electronic configuration of the d-orbital of the central transition metal, so changing the ligand field splitting of the d-orbital allows to control the physical properties. The arrangement of metals and ligands in order of the ligand field splitting is called a spectrochemical series. There is already a spectrochemical series only in the case of octahedral hexa-coordination complexes, but no equivalent index is shown for any other symmetry such as tetrahedral tetra-coordination complexes. In this study, we have investigated the creation of spectrochemical series in tetrahedral tetra-coordinated metal complexes. As a result, it is possible to accurately grasp the ligand field splitting of a tetrahedral tetra-coordinated metal complex, and to more effectively apply energy for expressing a spin crossover phenomenon in which the magnetism reversibly changes.
Cobalt Thiolates with Organic N,N,S-Tridentate Ligand: Conversion of Thiolate Complex to Sulfinate Complex via Sulfenate
Authors: Kotera Takanori , Fujita Atsushi , Mikuriya Masahiro , Yoshioka Daisuke , Shibahara Takashi , Nishimoto Kichisuke , Handa Makoto
Published: May 2020

Mononuclear cobalt(III) complex with 2-[(3-aminopropyl)amino]ethanethiol (Hapaet), [Co(apaet)2]ClO4 (1) and the sulfinate complex, [Co(apaetO2)2]ClO4 (2) were synthesized and characterized by measurements of the elemental analysis, infrared and electronic spectra (UV-vis-NIR), and temperature dependence of magnetic susceptibilities (4.5—300 K), and DFT calculations. X-Ray crystal structure analysis of 1 and 2 revealed an octahedral CoS2N4 or Co(SO2)2N4 chromophore with meridional chelation of two apaet− or apaetO2
−. Conversion of 1 to the sulfinate complex 2 via the sulfenate complex was investigated by UV-vis spectra. Oxidation reaction of capsanthin with 1 was also examined.
Smart Aquaponics Design Using Internet of Things Technology
Authors: Hafid Hardyanto R. , Ciptadi Prahenusa Wahyu
Published: May 2020

Smart Aquaponic is a system of planting plants and maintaining fish in one container with integrated Internet of Things technology. Aquaponic is the process by which plants utilize nutrients derived from fish feces which, if left in the pond, will become toxic to the fish. Plants function as a filter of vegetation which will break down these toxic substances into substances that are not harmful to fish. Plants also supply oxygen to the water used to maintain fish. With this cycle there will be a mutually beneficial cycle between plants and fish. This system is very profitable, because the land used will not be too large. The purpose of this study was to develop a smart aquaponic system using Internet of Things technology. In this system aquaponics are equipped with sensors that function as monitors and actuators. Actuators can be controlled by users using smart phones. Sensor monitoring can be observed by users using smart phones. The method used in this study uses the Microsoft Solution Framework (MSF) with the waterfall system development method and Object Oriented Development (OOD) method. Stages in this study includes problem identification, preliminary planning and design, piloting and implementation. Conclusion: This smart aquaponics design is ready to be implemented in small scale trials.
Stability of carbon-vacancy complexes in α-Fe
Authors: Mizuno Masataka , Yamada Waka , Sugita Kazuki , Araki Hideki
Published: May 2020

We investigated the stability and structure of C
n

V and N
n

V complexes in α-Fe using first-principles calculations. In the case of C
n

V complexes, C2
V is most stable due to the energy gain by forming the C-C bonding. However, N2
V is less stable than N1
V. This is due to the repulsive interaction between N atoms in N
n

V complex. The overlap population analysis reveals that the C 2s - C 2s antibinding interaction is reduced by the C 2s - C 2p bonding interaction. The interaction between the N 2s and N 2p orbitals is not strong enough to cancel the N 2s - N 2s antibonding interaction because the energy difference between the N 2s and N 2p orbitals is larger than that between the C 2s and C 2p orbitals.
Alternative Solutions for Determining Village Funds Using Weight Product Method
Authors: Hastono Tri , Syah Firdiyan
Published: May 2020

Based on the Minister of Home Affairs Regulation No. 113 of 2014 concerning Village Financial Management, the management of village funds must be carried out in a transparent, accountable, participatory, orderly, and budgetary discipline. Village fund management starts from January 1 to December 31 of the current year as outlined in the Village Budget (APBDesa). Village budget consists of village income, village expenditure, and Village Financing. The current village fund management mechanism is felt to be too convoluted and filled with obscurity. For example, the measurement for village fund recipients is still based on the results of deliberations. The results of the deliberations that are produced make it possible to have political elements or like-dislike factors. The result will be far from equal distribution and right on target. From this description, we need a tool that is used to help provide a fair decision regarding the recipient of village funds. The tool is a tool that is not influenced by things that cause no equalization and only requires a short time in its processing. So that the recipients of village funds are quickly identified by looking at several criteria. This study provides a solution for determining the recipients of village funds using the Weight Product method. Weight Product Method is one method often used to solve the problem of decision making with many attributes or criteria (MADM). This method is more efficient than some other methods in solving the problem of decision making with many attributes or criteria (Multi Attibute Decision Making). The criteria used in this study include: Poverty rates, area size, geographical difficulties, and infrastructure.
EKA v1: Emergency Call Auto-register, an Emergency Warning System based on Internet of Things for Intensive Care Patient at Hospital
Authors: Megantoro Prisma , Winarno Hendra Ari
Published: May 2020

The emergency calling device for nurse is generally located in every ward of a hospital. It is an important facility for every inpatient. However, generally these devices are still in the form of conventional electrical components that uses long wiring. This is because this system must reach all inpatient rooms. In addition, the caller feature is also very limited, usually only in the form of an emergency button. The caller system is also not yet integrated with the hospital database, so it becomes an obstacle for nurses and doctors to understand the patient’s condition in an emergency. This article discusses the design of a nurse calling device that is connected wirelessly via a wifi network on the ward. There are also several types of calling features so that the nurse or doctor immediately knows the type of assistance a patient needs. In addition, the client and server system is integrated with the hospital database, which shows a detailed patient history. This device uses the NodeMCU ESP 8266 board as a client and Raspberry Pi 3 as a server. The features placed on this device work well as a design and are successfully implemented for one ward per server.
Kinetics of Oxidation Decomposition on Jatropha Curcas Biodiesel
Authors: Supriyono  , Sumardiyono  , Purwanti Enny , Retno Ambarwati S.L.
Published: May 2020

High free fatty acid jatropha curcas oil was use as a feedstock of biodiesel through two step esterification, first by reaction of Jatropha curcas oil with methanol catalyzed by sulfuric acid, and second step is transesterification process with methanol catalyzed by sodium hydroxide. After purification step, 120 ppm pyrogallol was introduced into Jatropha curcas biodiesel. Accelerated controlled oxidation process was performed using rancimat test equipment with the dry airflow to the reaction tube is 10 L/min. Assuming that oxygen only reacts with double bond of the compound that compose biodiesel, measurement the quantity changes of double bond on biodiesel by the changes of the value of iodine number will brought to the rate of reaction. While reaction rate constant determine by Arrhenius law was calculated from the data of time to reach induction period in a certain temperature. It was found that total rate of oxidation process was determined by chemical reaction rate rather than mass transfer rate of oxygen to the body of biodiesel, both on biodiesel with or without pyrogallol. While in a presence of 120 ppm pyrogallol on jatropha curcas biodiesel, Arrhenius constant was determined by the value of frequency factor (A) = 28.47 x 106/sec and activation energy (E) = 97,31 kJ/mol. This mean that on the ambient temperature 30 oC, Jatropha curcas biodiesel in a presence of 120 ppm pyrogallol will decrease their iodine value 3.4% after 2.3 years.
The Multi Agent System for Job Recommendation
Authors: Tentua Meilany Nonsi , Azhari Azhari , Musdholifah Aina
Published: May 2020

The number of available job portals causes abundant information. Therefore, a system of recommendations is needed by job seekers to find jobs that fit their profile. Offering job vacancies on job portals are changing every time because there are always additional job search data and job opening data. Multi-agents system is a technology that can be used to handle information changes. This article proposed a recommendation system is expected to help job seekers to get jobs in accordance with the field of science they have. The system will monitor what work is offered by online job portals. From the results of observations, the job content offered will be used as a reference so that if new content is entered, the agent will automatically provide input to the job seeker. Based on the results of the implementation of the recommendation system using a multi-agent system can provide search results that are in accordance with what is inputted by the user based on the profile they have. These search results can recommend jobs that match the job seeker profile.
The Effect Of Chloride Acid (Hcl) Concentration And Fermentation On Bioethanol Levels From Breadfruit (Artocarpus Artilis) Substrate
Authors: Hidayati Nasrul Rofiah
Published: May 2020

At present, the public demand for fuel oil (BBM) is increasing inversely proportional to its availability. One of the efforts to reduce people’s dependence on BBM is to utilize alternative vegetable-based energy such as bioethanol. Bioethanol is a fermented product that can be made from a substrate containing carbohydrates. Breadfruit (Artocarpus artilis) is one of the agricultural products that have a fairly high starch content of 89% and is not included as a staple food source in Indonesia. Utilization of breadfruit is still not optimal because breadfruit is only used as a snack or made into flour. This study aimed to make bioethanol with breadfruit raw material (Artocarpus artilis). The method of this study consisted of two stages, the first step was the hydrolysis of breadfruit flour with hydrochloric acid (HCL) catalyst. The concentrations of HCL used in this study were 1%, 1.5%, and 2%. The second stage of fermentation using Saccharomyces cerevisiae was with 72 hours fermentation time, 120 hours and 168 hours. From the results of the research, it was found that the highest levels of bioethanol to the treatment of HCL 2% concentration and fermentation duration of 168 hours was 17.6%.
Color Based Segmentation Using Fuzzy C Means For Bamboo As EnvironmentallyFriendly Material
Authors: Latifah Khoiriya , Siswanto Joko , Supriyadi Bambang , Rochim Abdul
Published: May 2020

Bamboo is an environmentally friendly material. Many benefits of bamboo that we can get. Indonesia as a bamboo-producing country needs easy techniques to make good classification of bamboo. Bamboo is composed of fibers and fiber adhesives. There are various kinds of bamboo in Indonesia. This study uses digital image processing with fuzzy c means based segmentation to identify bamboo. Segmentation is an important thing in image processing. By using fuzzy c means in segmentation in this study obtained good segmentation results. This study uses 4 types of bamboo, namely Javanese bamboo, Ori bamboo and Petung bamboo and Wulung bamboo. There are 40 images as training images and 12 test images. The results of segmentation show that fuzzy c means produces good segmentation with the number of iterations between 20-23 and time ranging from 0.11 to 0.15. The accuracy of this test reaches 80%.
Design of Product Monitoring System Using Internet of Things Technology for Smart Manufacturing
Authors: Sari Marti Widya , Herianto  , Dharma IGB Budi , Tontowi A.E.
Published: May 2020

The application system in the industrial era 4.0 is currently growing rapidly. One of them is the implementation of smart manufacturing in the industrial sector. In smart manufacturing, production processes can be monitored automatically and real time, starting from material selection, then the production process to the planned product. In this study discussed the design of a monitoring system on smart manufacturing based on internet of things technology. Smart technology is implemented on material scans automatically based on color sensors, then from the material it will also be known that with these materials produce certain products and require any material. In addition, the system will also automatically detect through the initial material to find out which processes will be passed. The methods used include literature studies, system requirements analysis, system design and system testing. The results of this study are in the form of a hardware system design and display of production process monitoring system applications. In the system that is made also a notification is displayed if a bottle neck occurs in the production process.
Designing Enterprise Architecture in Koperasi Karyawan using TOGAF Architecture Development
Authors: Nada Noora Qotrun , Wibowo Setyoningsih , Novita Mega
Published: May 2020

The Open Group shows that Enterprise Architecture (EA) can produce an IT blueprint that can be used to determine business, technology, and information to support the achievement of an organization’s vision and mission. EA can also be seen as a model, a set of principles and methods used to produce the actual organizational structure of a company with business processes used including business operations, business planning, information technology, and information systems. EA is also in the form of models, graphics and narratives that will explain the scope of a company’s business processes and design. Koperasi Karyawan TEKAD do not yet have information systems and operations are driven by manual system. The purpose of this study was to design an EA, specifically in Koperasi Karyawan using the TOGAF framework. In other words, this architecture was created by emphasizing the relationship between IT and business. The EA model is intended to maximize business alignment with IT in all situations, but depends on the nature of the business and the capacity in business and IT management in Koperasi Karyawan. This EA design produces a blueprint that can be used so that service quality and performance can be improved.
Decision Support System in Recommending Climbing Tourism Destinations with Profile Matching Method
Authors: Sri Rahayu Ginantra Ni Luh Wiwik , Bhawika Gita Widi , Zamsuri Ahmad , Budianto Fadjar , Achmad Daengs GS
Published: May 2020

Climbing is one of the extreme sports categories and recreational activities that are in great demand in the last decade, especially teenagers. Climbing offers a different sensation and challenge from other sports, besides this sport also offers a beautiful view when the climbers have reached the top of the mountain that is intended, of course, also improves fitness and health. The purpose of this study is to provide climbing tourism destination recommendations to groups of organizations and individuals who have a hobby or are the first to want to do this sport. Data collection in this study was carried out by giving questionnaires to 3 groups of nature lovers organizations, each organization was given 10 questionnaires. In this study, there are 5 alternatives used, including Mount Jaya Wijaya, Mount Ijen, Mount Kerinci, Mount Rinjani and Mount Bromo with 6 Criteria, including Beauty, Altitude, Location, Cost and Pathway. Based on calculations using the Profile Matching method, the results are obtained that Mount Rinjani is a recommended climbing tourism destination.
Utilization of augmented reality technology as a learning media for early childhood
Authors: Anggara M R , Azizah N , Kustiawan I
Published: May 2020

The purpose of this study is to describe the use of augmented reality technology as a learning medium for early childhood. This study used descriptive qualitative method. Data collection techniques using observation and interviews with 4 early childhood. The results of this study indicate that the use of augmented reality technology as a medium of learning in early childhood can provide an understanding of an object concretely, improvisation of sounds and images that support the learning atmosphere, and be able to attract the attention and focus of children in school. In addition, a lot of potential is developed when implementing augmented reality technology. It is hoped that the use of this technology can be applied to early childhood as a form of learning media innovation.
Design of Graphical User Interface (GUI) for a remote laboratory on programmable logic controller experiments
Authors: Hambali M I , Haritman E , Pantjawati A B
Published: May 2020

Remote Laboratory is the use of telecommunications technology to conduct remote experiments. In this study, remote lab operates through the Graphical User Interface (GUI) display, where interactions are carried out online through computer devices. This GUI is designed to support experiments on Programmable Logic Controller (PLC) and must be able to facilitate the user and provide feedback directly to confirm that an action has been taken. This GUI design includes color, image, icon, label, and text navigation to present information to users when needed. This research was carried out through several stages, namely the design of the GUI by using Microsoft Visual Studio software, coding and testing of appearance and function. The results showed that the GUI design met the desired specifications, both in appearance and function. From the users testing, the GUI design get positive responses from all users.