bluuebunny/crossref_metadata_2025_split huggingface dataset:
STEAM-deaf learning model assisted by rube goldberg machine for deaf student in junior special needs school
Authors: Rusilowati A , Ulya E D , Sumpono I 
Published: July 2020

Abstract
The 2013 curriculum has been applied in Special Needs School. STEAM can be taught in deaf classrooms using hands-on project for giving students experience working in cooperative team. This paper provides the research of STEAM-Deaf model learning and utilization of Rube Goldberg Machine (RGM). It is aimed to determines characteristic, effectiveness and practical of this model. The method uses Research and Development with single participant design. This research was conducted at SLB Ungaran. The result of research shows that the characteristic STEAM-Deaf consist of syntax with six phases namely observation, research, planning, application, analyze, and evaluation. The support system was STEAM lesson plans, RGM, and worksheet. The reaction system was teachers playing a role as a guide, facilitator, and motivator. The instructional effect showed that the enhanced student’ understanding in cognitive aspect and growing students’ science creativity skill. The nurturant effect showed that students dare to do experiment, independent, and build good team work. The effectiveness of models’ to be analyze with effect size (d). The mean of deaf students’ understanding in cognitive ≥ 0.2 with high criteria. The percentage of science creativity skill, with very good and good criteria. The practical results obtained a percentage average based on deaf student and teacher with practical criteria. Based on the result of this study, it can be concluded that STEAM-Deaf model learning with utilization of RGM is practical and effective for enhancing deaf student’s cognitive aspect and for growing their science creativity skill.
Development and effectiveness of integrated science learning modules using vogarty integrated method based on Al-qur’an verses complementation
Authors: Astuti B , Ihwanudin M , Kusuma H H , Yulianto A 
Published: July 2020

Abstract
Science is easier for student to learn if it is taught in a manner which integrates scientific disciplines. In addition, when science learning taught in conjuction with religion it will enhance the religious character of students. However, schools have not implemented this integration of science and religion due to a lack of learning resources. The purpose of this research is to determine the level of validity, legibility, effectiveness, and practicality of the teaching material developed. This research uses the research and development method. The validity and practicality of the teaching material was tested using a questionnaire. Furthermore, for readability and effectiveness the test method was employed. The effectiveness test of teaching material is limited to improving students’ cognitive domains. The results showed that the teaching material is valid, easy to understand, effective and practical to use in teaching process.
Synchronization of a camera and x-ray tube in digital radiography system in UNNES medical physical laboratory
Authors: Susilo S , Purwaningsih P , Darsono T , Dewi A L , Taufiq U A , Setiawan R 
Published: July 2020

Abstract
Much development of medical devices has been made in the field of radiology. An example is the development of analog radiology into digital radiology. The result of a digital radiographic x-ray is a digital radiograph that can be processed further with image processing techniques. After that it can be printed (printed image) or sent by a teleradiology method. To increase the digital image results, a delay was needed between the opening of the camera lens and the x-ray exposure. Then a delay circuit optimization is needed between the DSLR (digital single lens reflex) cameras, and x-ray exposure on Arduino Uno-based analog radiographs which are used as a unit delay and relay. In the unit delay, a push button triggered a millisecond, so that the Arduino IDE program was needed to set a delay. The relay functioned as a separator between the DC (Direct Current) on the camera and the AC (Alternating Current) on the x-ray tube. The results obtained were that the longer the x-ray exposure, the more intensity. Variation in delay time was regulated in the Arduino IDE program to get the best image quality with the least intensity of light to reduce radiation side effects in patients.
Low-cost imaging spectrophotometer system for absorbance measurement
Authors: Listiaji P , Suparta G B 
Published: July 2020

Abstract
The spectrophotometer system is widely used for testing the concentration of chemical elements in a liquid because it is sensitive and non-destructive. However, modern spectroscopic systems are expensive, and they have complex instrumentation. This study was to develop a low-cost imaging spectrophotometer system, consisting of a halogen lamp as the visible light source, CMOS camera as the detector, and monochromatic filters with a wavelength outputs of 645.53 nm (red), 510.04 nm (green), 488.24 nm (blue), and 475.02 nm (violet). In this research, we tested 3 types of sugar solutions (i.e. glucose, fructose, and sucrose) with varied concentrations (0%, 10 %, 20 %, 30 %, and 40% respectively). Sample images were captured using the camera to produce 8-bit digital images. The intensity of light transmission after passing through the sugar solution sample was measured based on the grey values in the sample images. Differences in sugar concentrations can be observed by measuring absorbance. Absorbance measuring showed that increase of absorbance is directly related to an increase of sugar solution concentration. Maximum absorbance for all types of sugar is obtained through the use of violet light (475.02 nm). In addition, there is a linear relationship between sugar concentration and absorbance, where the coefficient of determination (R2) is 0.99. The slope difference of the linear absorbance graph between the three types of sugar samples shows differences in radiation absorption characteristics.
The natural grating method in determining family heredity
Authors: Ellianawati  , Budhiman A 
Published: July 2020

Abstract
Human hair is one of material used to identify heredity of an individual. There has been a lot of researches done by scientists in sophisticated ways to test inheritance based on hair characteristics. However, to teach this uniqueness at the school level can be done with a simple test. One of them with natural grating method. This study aims to analyze the interference patterns produced by hair from the diffraction process. Five non-blood related families were examined. A beam of 800 nm wavelength from the laser is passed through the hair and its lattice width is calculated. Lattice gap data obtained are then calculated the correlation value between mother and child father. The results of this simple analysis are not enough to support the inheritance relationship of one family. Obtained mystery figures that still need to be studied further. But found one family with twins who have the same width of hair gap. This finding is certainly very interesting to be taught to students at the school level.
Effective gamma irradiation dose on viscosity and molecular weight reduction of chitosan
Authors: Marianti A , Anggraito Y U , Christijanti W 
Published: July 2020

Abstract
Chitosan is a potential natural blood lead chelating agent. In order to improve its chelating capability, the solubility of chitosan must be enhanced. It is an essential property which is also closely related to molecular weight and viscosity. One of the most renowned and effective methods to reduce the molecular weight and viscosity of a certain particle is irradiation. This research aims to examine the effect of Gamma 60Co irradiation upon molecular weight and viscosity of chitosan. 80 mesh chitosan was irradiated using Gamma 60Co with different doses (0, 50, 100, and 150 kGy). This process was carried out using gamma irradiator in the Centre of Isotopes and Radiation Application at BATAN (National Nuclear Energy Agency). Viscosity and molecular weight measurements were conducted using the viscosimetric method in the chemistry laboratory of FMIPA UNNES, while molecular weight was calculated using the Mark-Houwink equation. Results showed that the specific viscosity of chitosan decreased after the irradiation process from the initial specific viscosity of 4.98 η (0 kGy dose) to 3.28 η (50 kGy), 2.87 η (100 kGy), and 2.09 η (150 kGy). A similar trend was also found in the molecular weight of chitosan from the initial molecular weight of 2.10×105 kDa (0 kGy dose) to 1.25×105 kDa (50 kGy), 1.04×105 kDa (100 kGy), and 5.72 × 104 kDa (150 kGy). It was concluded that Gamma Co60 irradiation decreases the viscosity and molecular weight of chitosan by the effective dose of 150 kGy.
Guided inquiry assisted by edmodo application to improve student critical thinking skills in redox material
Authors: Dewi R K , Wardani S 
Published: July 2020

Abstract
Guided inquiry is a learning model that encourages students to practice their thinking skills by asking questions and getting answers on the basis of curiosity. The Edmodo application is an E-Leaning based media designed to manage classes and assignments online so students can connect directly with their teachers and classmates. The purpose of this study was to determine the increase in students’ critical thinking skills towards the implementation of guided inquiry model assisted by Edmodo application on Redox material. The sample uses cluster random sampling, namely 3 classes from X MIPA in SMA Negeri Semarang. The variables studied were indicators of students’ critical thinking skills with experimental design pre-test and post-test. The improvement test used a Normalized Gain Test (N-gain) the amount of N-gain in the control class is 0.6 in the medium category, and 0.7 in the high category in experimental class 1, and 0.72 in the high category in experimental class 2. The influence between variables produced a large correlation coefficient of cognitive learning outcomes of the experimental class 1 of 0.319 and in experimental class 2 of 0.408. The influence between variables produces a biserial correlation coefficient of experimental class 1 amounting to 0.319 and experimental class 2 of 0.408. The influence between variables produces a coefficient of determination of the experimental class 1 of 10% and experimental class 2 of 17%. The results of the study showed an increase in students’ critical thinking skills in both the control and experimental classes. The critical thinking skills students who were given the guided inquiry assisted by the Edmodo application in the experimental class were better than students who were given guided inquiry without the Edmodo application in the control class on the Redox material.
Titaneon: the eco smart lamp to degrade cigarette smoke pollutants
Authors: Lathif Y F , Marwoto P , Iswari R S 
Published: July 2020

Abstract
The purpose of this study is to find out the results of the “TITANEON” degradation power test on hazardous CO (carbon monoxide) compounds qualitatively and quantitatively and to explain the working system of the lamp. The research methods used in this study are (a) preparation: tools and materials, design testing tools; (b) conducting research: TiO2/Co synthesis, coating, tool performance test and data processing and analysis; (c) evaluation. The test results in this study were divided into two, namely qualitative and quantitative. In the qualitative test results, the “TITANEON” lamp is able to degrade CO compounds for 20 minutes. The quantitative results from 0 minutes amounted to 15526.24 ppm, 5 minutes later the CO concentration was 6202.82, in the next 15 minutes CO concentration was 2549.98 ppm and in the last 20 minutes the CO concentration was 1871.89 ppm. The system works, namely the first light that involves TiO2 nanoparticles will excite electrons from the valence band to the conduction band while producing positive holes in the valence band and negatively charged electron pairs. After that, TiO2 nanoparticles are transformed into super oxide compounds which release active oxygen species (O2 radicals and OH radicals), these compounds will degrade cigarette smoke compounds into CO2 and H2O compounds through photocatalytic mechanisms.
Nature of science questionnaire for students, Indonesian version: factor analysis, reliability and validity
Authors: Santiani  , Purwantoyo E , Wiyanto W , Ridho S , Iswari R S , Marwoto P , Rusilowati A , Sudarmin S , Ngabekti S 
Published: July 2020

Abstract
There are already many questionnaires on the nature of science that are used in general, but it is still very rare for Indonesian version. This study developed an Indonesian version of questionnaire on the nature of science for students. The questionnaire consists of 27 items with nine dimensions as result of literature study. The questionnaire was validated by 12 experts with improvements to several items. Questionnaire is reliable with 11 items are valid. Factor analysis shows that this questionnaire consists of ten dimensions that is not in accordance with the grid arranged. Excess dimensions of factor analysis occur because these dimensions are closely interrelated so that their indicators are difficult to differentiate. This tested questionnaire can be used to see the students’ views on the nature of science. To compile the next questionnaire on the nature of science, we recommend that the dimensions be simplified; the dimensions that are closely related should be made into one.
The determination of fluid viscosity using tracker-assisted falling ball viscosimeter
Authors: Akhlis I , Syaifurrozaq M , Sugiyanto  , Marwoto P , Iswari RS 
Published: July 2020

Abstract
This study intends to determine fluid viscosity. The method adopted was the utilization of a tracker-assisted falling ball viscosimeter. The falling ball viscosimeter was employed to get the motion of objects in the fluid, which was then recorded with a video recorder. The motion of objects in the video was analyzed by tracker software to get the terminal speed value of objects in the fluid. The value of fluid viscosity was then calculated using Stokes’ law. The results showed that the liquid viscosity value was 1.298 N.s/m2.
Designing e-learning based independent learning activity unit through virtual worksheet: improving student’s 4Cs
Authors: Aziziy Y N , Sulhadi  , Marwoto P , Iswari R S 
Published: July 2020

Abstract
The subject of Physics at Sumenep Senior High School grounded in 4C’s (Communication, Collaboration, Critical Thinking, Creativity) has not yet been deliberately developed because of the lack of learning tools oriented in the 4C’s. Independent Learning Activity Unit (UKBM) as teaching systems that develop 4C’s can be used to enable students to solve problems. In this research was to create e-Learning Independent Learning Activity Unit teaching are developed through Virtual Worksheet which can improve the student 4C’s. The development of teaching tools was conducted in five major steps (Analysis, Design, Development, Implementation, Evaluation). The characteristics of the UKBM e-Learning are developed through problems on a virtual worksheet, which must be solved by students. This study material is centered around students and must be completed individually and in groups. The results showed that teaching systems were valid. The effectiveness of teaching systems based on concept understanding was increased by an average N-gain of experimental class which are respectively classified as high category. The feasibility of the teaching systems on the treated (experiment) class from the first until the seventh meeting was in a good category. The teacher and students responded positively to the teaching systems in the classroom.
Justification on cyclopropene to propyne isomerization pathway based on vibrational calculations
Authors: Madinah R , Rusydi F , Boli L S P , Khoirunisa V , Fahmi M Z , Zaidan A H 
Published: July 2020

Abstract
We report a density-functional coupled with vibrational calculation on justifying the isomerization pathway of cyclopropene to propyne. The idea is to present the pathway in energy level diagram which the transition state is ensured by tracking a particular mode that supports the cyclic bond breaking and triple bond formation to occur. This mode decreases along the pathway and disappears at the transition state. To verify the designed pathway, the activation energy of the isomerization is used to find the rate constant with respect to experimental data at 500 K and 700 K by using transition state theory (TST). At those temperatures, TST predicts the rate constant at the same order of magnitude with the experimental result. It shows that the trend between calculation and experimental data is qualitatively in a good agreement, which implies that the designed pathway is justified. Furthermore, this study can be used as a guide if one needs to construct an isomerization pathway.
Effects of Boron Nitride on the optical properties of Silicene: density functional theory calculations
Authors: Pamungkas M A , Ghozali A E , Abdurrouf  
Published: July 2020

Abstract
Two dimensional materials with honeycomb lattice have attracted researcher’s attention owing to their several superior properties. Silicene which is the most compatible 2D materials with silicon-based nano-electronic industry. Density functional theory was performed to investigate optical properties of silicene doped with Boron Nitride. With the addition of Boron Nitrid (BN), the refractive index value of silicene decreases with the highest value achieved in the position of bridges with a value of 1.783, and reaches the peak at lower energy.
Simple measurement instrument of moisture content for Indonesia coffee powder based on capacitive sensor
Authors: Firmansyah D A , Negara B J , Maulana Y , Firmansyah V , Juliastuti E 
Published: July 2020

Abstract
Moisture content is one of the most important parameters for coffee commodity especially related to quality and taste. However, research on measurement instruments which capable to measure moisture content directly from a coffee sample is still very rare. Therefore, in the current study, this prototype is realized by utilized a capacitive sensor made from couple of copper plates to measure capacitive signal from the sample, which subsequently converted to a voltage signal by an oscillator and comparator, and then finally converted to the moisture content by a microcontroller which can be shown on an LCD screen. An accuracy testing is carried out by comparing the moisture content measured from the oven heating reference method and the prototype. The results show the average of measurement errors is 0.08 % and 0.22 % for coffee evaporated sample and coffee-water mixed sample respectively. Based on the maximum permissible error stated in OIML International Recommendation of R-059, this prototype meets the requirement of moisture meter of Class I.
Measurement optimization of high accuracy check master based on interferometry method in National Standardization Agency of Indonesia: a preliminary study for measuring range of 10 mm to 400 mm
Authors: Novyanto O , Alfiyati N 
Published: July 2020

Abstract
High accuracy check master is a type of geometry gauge that often used to check the accuracy of Coordinate Measuring Machine (CMM) in the high-class metrological institutes and manufacturing industries. This type of geometry gauge is composed of several high-accuracy short gauge blocks and a large rod as its foundation. Conventionally, the measurement of high accuracy check master can be carried on by using measuring machine. Since the bench has limit up to 400 mm, the measurement of high accuracy check master more than 400 mm range is performed in two-step. Firstly, from nominal range of 10 mm to 400 mm and the other range by utilizing extension. In some cases, this measurement method has bigger expanded uncertainty value, i.e. more than 2 µm. Since the check master has important role to verify the accuracy of CMM, the quality of calibration system of high accuracy check master is required to be improved. This paper describes only to achieve high accuracy of measurement up to 400 mm. In the developed measuring system, the heterodyne laser interferometer is used as the reference. The optical configuration of laser is combined with the measuring machine as a moving part. In order to improve the accuracy of measurement, the refractive index of air and the temperature compensation are recalculated manually by Edlen’s formula and linear expansion equation, respectively. Using this method, the expanded uncertainty from calibration 400 mm high accuracy check master is less than 1 µm. The results had a good agreement to the measurement results from manufacturer with international certification, experimentally. In conclusion, this method can be applied to calibrate the high accuracy check master of 400 mm range.
Gravitational water vortex pico hydro power modeling for aquaculture implementation
Authors: Maulana D W , Rizwan F M , Mulyana C , Faizal F , Panatarani C , Joni I M 
Published: July 2020

Abstract
Nanotechnology and Graphene Research Centre (PRINT-G) of Universitas Padjadjaran is currently developing fine bubble generator (FBG) technology which is applied for the fisheries sector to process aquaculture wastewater into clean water and as an aerator. In its implementation, adequate energy is needed, but it can be applied with cheaper electricity costs, such as renewable energy sources. In this research, a gravitational water vortex pico hydro power (GWVPHP) plant modeling has been carried out. .This system can be used under 2 meters head condition and for small water flow, that is suitable to use in fishing pond locations that do not have high head and limited water. It is known that the velocity of water flow is 0.4 m/s, and the head is 1.6 meters with the height level of the water varying every 5 centimeters increase in the range of 5 to 50 centimeters. As a result, we obtained the minimum potential power of 111.9 Watt and a maximum of 1,558.2 Watt. In modeling, we assumed that we used turbine with 80 percent efficiency, thus we obtained the turbine generation power of 89.6 Watt, and a maximum of 1,246.6 Watt. In addition, the modeling also uses 3 phase AC generators with an efficiency value of 70 percent, so that a minimum generator generation power of 62.7 Watt is obtained, and a maximum of 872.6 Watt is obtained. Control panel also used with an efficiency of 70 percent, so that a minimum power that produced is 43.9 Watt, and a maximum of 610.8 Watt. Fine bubble generator (FBG) that used for aquaculture needs 125 Watt to be functioned. Thus, the power that had generated by the gravitational water vortex pico hydro power (GWVPHP) plant could be supplied the energy needs of fine bubble generator (FBG).
Analysis of Mo-99 production as function of CAMOLYP reactor power
Authors: Bartolomeus D , Syarip S 
Published: July 2020

Abstract
CAMOLYP or critical assembly for molly production is a nuclear reactor based on mixed uranium thorium fuels, which is currently being developed in BATAN Yogyakarta. This study aims to know how much the amount of 99Mo isotope production can be achieved on 6 days reactor operation as function of different power levels. The method is a calculation of reactor physics simulation by using MCNPX computer code. The calculation is done for the reactor core configuration of 23 thorium dioxide fuel rods in the outer ring with the total mass of 73.12 kg and 1.706 kg of 235U in the annulus. The analysis result shows that the CAMOLYP’s 99Mo production can be formulated as linear function of the reactor power level in watt. From the analysis result, it can be concluded that the CAMOLYP reactor can produce 39.91 curie 99Mo at 1000 watts and 6 days operations. This analysis result indicates that the CAMOLYP reactor as a low power reactor has succeeded in producing 99Mo isotope which is sufficient for domestic needs.