bluuebunny/crossref_metadata_2025 huggingface dataset:
Cultivable Endophytic Fungi Producing Phosphatase of Rhizophora mucronata
Authors: Fitriyana Hanim , ’Ainy Erny Qurotul
Published: August 2020

Low availability of phosphorus (P) is a major constraint for optimal crop production as in the soil it is mostly present in insoluble form. Therefore, the availability of phosphate in the soil can be improved by the utilization of phosphate-solubilizing microorganisms. The existence of Rhizophora mucronata as the dominant species in the Wanatirta mangrove forest, Kulon Progo is estimated to be inseparable from the role of endophytic fungi that produce important compounds for the growth and development of host plants including production of phosphatase enzyme. This study aimed to determine the diversity of endophytic fungi from R. mucronata root and to evaluate their potential in producing phosphatase enzyme. Isolation of endophytic fungi was conducted by growing the pieces of the root on the Pikovskaya medium containing insoluble phosphate, namely calcium phosphate (Ca3(PO4)2). Endophytic fungal isolates were purified on Potato Dextrose Agar medium. The screening test of phosphatase activity was performed to determine the ability of each isolate to produce phosphatase enzymes. The characterization of endophytic fungi isolates was carried out by observing the microscopic and macroscopic appearance of each isolate and then comparing it with the fungi identification book. The results obtained six endophytic fungi isolates of R. mucronata root, namely U2A, T2A, T3B, P2, P3A and P3B. The P2 isolate displayed a phosphatase activity characterized by the formation of a clear zone around the fungi isolate with the phosphate solubility index (PS1) is 2.04. Based on its morphological characteristics, P2 isolate belongs to the genus Penicillium.
Effectivity of Water-Soluble Chitosan from Rajungan Shell Waste as Corrosion Inhibitor on Iron in 1 M HCl
Authors: Awaliah T P , Asnawati D , Hamdiani S
Published: August 2020

Corrosion is the process of metal oxidation in the presence of oxygen which causes losses in the industrial field. This study was conducted with the aim to determine the effectivity of water-soluble chitosan from crab shells as a corrosion inhibitor on iron in 1M HCl media. Crab shell waste was demineralized and deproteinated to obtain chitin. Chitin obtained was then deacetylated to obtain Water Soluble Chitosan (WSC). The inhibition efficiency of WSC on iron corrosion in HCL 1 M media was determined by the weight loss method. The results showed that the corrosion rate decreased with the increase of inhibitor concentrations of 0, 100, 300 and 500 ppm. However, the increase in temperatures (303, 313 and 323 K) also increased the corrosion rate. The inhibition efficiency increased as the inhibitor concentration increased. The optimum efficiency occurred at a temperature of 303 K and a concentration of 500 ppm which was equal to 98.94%. The corrosion rate decreased with the increase of pH values (3, 4 and 5). WSC adsorption from crab shell waste on the surface of iron in 1M HCl media follows the isothermal model of Freundlich adsorption. In the thermodynamic study, the values of Ea, ΔH ΔS, and ΔG0Adswere used to determine the adsorption of iron inhibitors. The results of the study showed that the reaction is a physical reaction (physisorption), endothermic, and spontaneous.
Identification Of Compounds Flavonoids Namnam Leaf Extract (Cynometra Cauliflora) As Inhibiting A-Glucosidase
Authors: Sumarlin La Ode , Suprayogi Agik , Rahminiwati Min , Satyaningtijas Aryani , Nugraha Achmad Tjachja , Sukandar Dede , Pangestika Harni , Pratiwi Lia
Published: August 2020

Plants namnam (Cynometra cauliflora) has the potential to be developed for a variety of bioactive ingredients in particular flavonoid compounds as inhibitors of α-glucosidase. These compounds can be extracted with various solvents and column chromatography, and can be also characterized by a variety of instruments. In this study, these compounds liquid-liquid extraction with n-butanol followed by column chromatography process. Meanwhile, characterization and separation of the most active fractions using TLC (Thin Layer Chromatography), FTIR (Fourier Transform Infrared) and LCMS (Liquid Chromatography Mass Spectrometry). Characterization of compounds with FTIR results show similarities with flavonoids for their -OH groups (u 3200-3450 cm-1), C = C aromatic (u 1500-1675 cm-1), -CH aliphatic (u 1350-1470 cm-1), -CO (u 1080-1300 cm-1), and C = O (u 1690-1766 cm-1). While these results Characterization using LCMS showed flavonoid compounds such as xanthotoxin, Fraxetin, capensine, naringenin, malvidin, cyanidin, amorphigenin, nobiletin, isorhamnetin, epigallocathecin, gallate, apigenin and oenin. The compounds are alleged to have inhibitory activity against α-glucosidase among fraxetin, oenin, naringenin, malvidin, and cyanidin. Thus, the plant leaves Namnam has the potential to be developed as a natural therapy of diabetes mellitus through the mechanism of inhibition of α-glucosidase.
The Design Of Visual Media Based On Ict To Improve The Beginning Writing Of Autistic Spectrum Disorder Students In Elementary School
Authors: Wachidah Kemil , Syaefudin Udin , Wati Tri Linggo , Taufik Wahyu , Purwati Indriana Dwi
Published: August 2020

The purpose of this research is to produce the design of visual media development based on ICT (Information Communication and Technology) to improve the students’ initial writing of Autistic Spectrum Disorder (ASD) which is suitable to be used to support the learning process of writing Autistic Spectrum Disorder (ASD) students. This research uses research and development (R&D) model from Borg & Gall which is simplified into 3 stages, namely, (1) potential and problems, (2) data collection, and (3) product design. Data collection techniques in this study are observation, interviews and documentation. The results of this study is the design of the development of visual media based on ICT (Information Communication and Technology) to improve the beginning writing skills of Autistic Spectrum Disorder (ASD) students in elementary School.
Utilization of Data Mining Techniques in National Food Security during the Covid-19 Pandemic in Indonesia
Authors: Elsi Zulhipni Reno Saputra , Pratiwi Heny , Efendi Yoyon , Rusdina R , Alfah Rina , Windarto Agus Perdana , Wiza Fana
Published: August 2020

The aim of the research is to map clusters on Indonesia’s national food security during the Covid-19 Pandemic. Where food security is a condition for the fulfillment of food for the state up to individuals, which is reflected in the availability of sufficient food, both in quantity and quality, safe, diverse, nutritious, equitable, and affordable and does not conflict with the religion, beliefs and culture of the community, to be able to live a healthy, active, and productive life in a sustainable manner. The data source used is secondary data from the Central Statistics Agency (abbreviated BPS). The data consists of monthly per capita expenditure in urban and rural areas by province and group of goods (rupiah) consisting of 33 data records (2011-2018). The group of goods used is expenditures used for food costs. The data mining method used is k-medoids which are part of the clustering. Cluster mapping uses 2 labels namely C1: labels with high food security and C2: labels with low food security. The results of the k-medoids method calculation concluded that 19 provinces were in C1 cluster and 14 provinces were in C2 cluster. From these results it is stated that 42% of Indonesia still has low food security as evidenced by the fulfillment of higher food needs than non-food. These regions are West Sumatra, Riau, Bangka Belitung Islands, Riau islands, DKI Jakarta, West Java, Banten, Bali, Central Kalimantan, South Borneo, East Kalimantan, North Sulawesi, West Papua and Papua.
Effectiveness of Mobile Learning Media on Computer Assembly at Vocational High School
Authors: Sukardi  , Mayefis Reska , Usmeldi
Published: August 2020

The purpose of this study was to determine the effectiveness of mobile learning media in computer assembly subjects in vocational high schools. Previously this media had been declared valid by media experts and material experts, which was then used by students. The research method used in this study is quasi-experimental, with time-series research design. Data collection techniques with pretest and posttest. The effectiveness obtained from the results of the post-test seen from classical completeness, all students declared complete and through the gain score in the medium category. Based on the findings of this study it was concluded that the mobile learning media is effective to be used as a learning media and increase the learning outcomes. This research recommends to be tested more broadly and to provide more complete content for the sake of improvement in the development of this mobile learning media.
Developing Mathematics Module Based on Literacy and Higher Order Thinking Skills (HOTS) Questions to Train Critical Thinking Ability of High School Students in Mojokerto
Authors: Feriyanto F , Putri R O E
Published: August 2020

This research aims to describe the process and results of the developing mathematical module based on literacy and higher order thinking skills (HOTS) to train the critical thinking ability of high school students in Mojokerto that are valid, practical and effective. This research is a development research that uses an adopted Tessmer development model. The subjects of this research were 11thgrade students at SMAN 1 Puri Mojokerto. Three students with high, medium and low mathematical ability for the One to One stage. In the Small Group stage, nine students, with the provisions of three students with high mathematical ability, three students with middle mathematical ability, and three students with low mathematical ability. While the field test stage, the research subjects were 30 students with heterogeneous mathematical ability. The students’ mathematical abilities were seen from the first semester of academic year report scores and in each stage. The development process starts from the preliminary stage, which is conducting literature studies about mathematics module based on literacy and HOTS questions, this process then followed by contacting the headmaster and teachers regarding the research schedule. The next stage is the self-evaluation, this stage consists of the analysis and design stages that analyze the students as the subject of this research and material used in the research. The materials used are Mathematical Induction, Linear Program, Matrix and Geometry Transformation, and designing a prototype. The third stage is prototyping, this stage consists of experts review, one to one, small group and field test. In the expert review, a prototype II was produced which were said to be valid. Whereas in the one to one, three students were tested and III prototypes were produced. The small group, a trial was conducted and a prototype IV was produced. Then the field test, testing and produced mathematical modules that met the valid, practical and effective. The results of this study are mathematics module based literacy and HOTS questions to train critical thinking ability that meet the validity criteria with valid categories, fulfill practical criteria with a very practical level. As well as meeting the module’s effectiveness criteria by having students’ critical thinking ability either high or high.
The Development of Instructional Multimedia based on Science, Environment, Technology, and Society (SETS)
Authors: Hidayati Abna , Bentri Alwen , Yeni Fetri , Zuwirna  , Eldarni
Published: August 2020

This research aims to produce a valid and practical SETS-based instructional multimedia for natural science course to seventh-grade students associated with media worthiness criteria. This study applied research and development methodology with 4-D Model which comprises of four-stage procedure accordingly, such as: define, design, develop, and disseminate. Three experts engaged with the product validation process with two media experts and one material expert. Meanwhile, 22 students of MTs PP Muallimin Muhammadiyah Sawah Dangka, Regency of Agam involved in the product trial examination. To collect the data, the researchers used interview, questionnaire and documentation archives which were analyzed with a descriptive qualitative method. The result found that in the initial step, the researchers defined the instructional media integrated with science, environment, technology in the learning. In the development stage, it was conducted the incorporation of various instructional tools, such as learning video and animation. Meanwhile, in the phase of worthiness assessment from material and media experts, it was obtained the material validity around 85,67 % with ‘Very Good’ category so that the material was declared valid for use. Furthermore, through two steps of media validation, it was found that the final value of validator 1 nad 2 were 92.93% and 81.09% consecutively with the category “Very Good” so that the media was valid to be tested. It can be concluded that SETS-based learning multimedia is worth testing. Furthermore, the results of the analysis based on the testing of SETS-based multimedia product learning in students received an average score of 93% in the “Very Practical” category. These results indicate that SETS-based learning multimedia products (Science, Environment, Technology, and society) are worthy of being used as an alternative learning media in class VII SMP / MTs (junior high schools) for natural sciences subject.
Improving chemistry teacher candidates’ mental models in the kinetics course using SiMaYang type II learning
Authors: Lathifa U
Published: August 2020

This study aims to investigate the profile of chemistry teacher candidates’ mental models in the kinetics course and improve it using SiMayang Type II learning. The subject of this study was a class of chemistry education students at UIN Walisongo Semarang who had taken kinetics course. Sample was carried out using convenience sampling technique. This study used a descriptive design and pre-experimental one group pretest-posttest design. The results of investigation showed that before being given treatment using SiMayang Type II learning, mental models of students were dominated by initial mental models with a percentage of 55.53% while the rest were synthetic one. After being treated, it was found that there were reduction in the number of initial mental models by 18.03% and synthetic mental model by 4.47%. Meanwhile the scientific mental model increased by 22.50%. The results of statistical tests showed that the learning of SiMayang Type II is effective in improving students’ mental models of chemistry teacher candidates. Learning outcomes have increased with the moderate category based on the N-gain test.
The Android-Based Learning Media Using The Trait Treatment Interaction Model as Implementation of Industrial Era 4.0
Authors: Aswirna Prima , Harahap Kamela
Published: August 2020

A research has been carried out on the effect of android based construct 2 learning media using the trait treatment interaction model on the physics learning outcomes of students in class XII MAN 2 Padang Pariaman. The population in this study all classes XII MAN 2 Padang Pariaman with a sample of 36 students taken using cluster random sampling techniques. The research instrument was validated by 3 validator reprehension. The hypothesis in this study was tested using the ANACOVA test which had passed the normality test, homogeneity test and average similarity test. The results of this study indicate that the physics learning outcomes of students increased from an average of 79.8 to 87.4 in class XII Science 1 and from an average of 76 to 85 in class XII Science 2.
“GOLDARHES” As a Digitalization Blood Type Test Device Based on Light Sensors
Authors: Liastra S. M. , Faadhillah A. , Dinata M. T. S. , Mahendra A. D. , Rohmah L. N. H. , Yuliyanasari N.
Published: August 2020

According to the data, high death rate among surgery patients was caused by faulty blood typing which were still manually done and high risk in human error. GOLDARHES is a device to determine blood type uses a light sensor with LDR and LED components and an Arduino microcontroller, then it showed the results on LCD. This device has never been used in Indonesian healthcare facilities. The Casing which is environmental friendly material is made of corn husk waste containing cellulose, lignin, and hemicellulose. In addition, the energy power of the device itself uses a charging system so that it can reduce the amount of chemical waste that is difficult to decompose. The Methods of this research is True Experimental using 100 samples of participants. The results obtained will be displayed on the LCD which is processed in less than 10 seconds. The results of this research was faster than manually test, the mean of test period was take 5 seconds and the sensitivity of the tool is 95%. Thus “GOLDARHES” can be used as an effective, accurate, and fast medical device in determining blood type.
Effect of the cutting angle and the depth of cut toward wear of carbide tool on the lathe
Authors: Iswanto  , Firmansyah M. Fachrur , Mulyadi
Published: August 2020

The following paper discusses how the effect of the angle and the depth of cut toward wear and tear of chisel on the lathe, then sought relationship influence of both. In this study, the wear and tear of the chisel to be studied is the edge wear (VB). The varied machining parameters are cutting angle and depth of cut. Variation of cutting angle is equal to 60°, 75° and 90°. While the depth of cut is varied by 0,5 mm, 1,0 mm and 1,5 mm. The lathe used is a conventional lathe with 400 rpm spindle spin. After testing the wear of chisel, it can be concluded that the greater the angle of cutting the higher the level of wear chisel. So also on the variation of cut depth, the greater the depth of cut then the higher the wear rate of the chisel also. From the factorial test also shows that the cutting angle and depth of cut have a close relationship in the process of forming the tool wear.
Comparison of Effectiveness in Straight-Fin Radiator Types with variations in Time and cooling air velocity
Authors: Hidayat N , Setiawan M Y , Arif A , Afnison W
Published: August 2020

The heat is the result of combustion that occurs in the combustion chamber with very high temperatures above 800 °C. If this temperature is left, it will cause the engine to overheat so that it can cause damage to engine components. Current cooling liquid is also developed with advantages compared to normal water which is actually equipped with anti-freeze so that the liquid does not freeze during winter, it is also equipped with anti-rust content so that the radiator has a longer service life. This research was conducted experimentally on a 5K series Toyota Kijang car engine. The effectiveness of the radiator is known by measuring the temperature of the coolant entering the radiator, the temperature of the liquid coming out of the radiator, then measuring the temperature of the coolant inlet air, measuring the temperature of the coolant air after passing through the radiator. The results obtained that the Prestone brand coolant at 60 seconds with a cooling air velocity of 2.4 m / s is better in reducing the heat generated by this machine is proven by the effectiveness value of 0.494.
Development of automatic solar egg incubator to increase the productivity of super native chicken breeds
Authors: Yuhendri Muldi , Risfendra  , Muskhir Mukhlidi , Hambali
Published: August 2020

Super chicken is one type of chicken that began to be developed to get better meat with a faster harvest. Super native chicken seedlings can be obtained from broiler broodstocks with males from native chickens. In this paper, an automatic egg incubator is proposed to increase the productivity of super native chicken seedlings developed in Nagari Salareh Aia. This egg incubator can hold 200 chicken eggs with a heater using 8 pieces of 5 watt incandescent lamps. This tool is also equipped with a thermostat for automatic temperature regulation and a motor for moving the egg rack. Due to the low reliability of the electricity network in this area, the egg incubator is supplied with a 300 wp solar panel equipped with a 200 Ah battery to maintain electrical power continuity. The experimental results show that this egg incubator has worked well as expected.
The Effect of Vibration Energy Harvester Mechanism Toward the Shock Absorber Efficiency
Authors: Afnison W , Maksum H , Hidayat N
Published: August 2020

The installation of vibration energy harvester[1], [2] mechanism type Electromagnetic Regenerative Shock Absorber (ERSA)[3][4] on vehicles can increase their energy efficiency. They will produce a new energy sources which can be used to fulfil their energy needed. However, this mechanism installation can change the shock absorber efficiency value which affect the convenience of driving itself. This research used experimental method which the ERSA mechanism installed on the usual shock absorber. ERSA is designed to be able to capture translation movement from the shock absorber and change it to electrical energy like of linear generator mechanism. From the test, the efficiency increased 0.8-1.2% on each wheel. The increase of efficiency value thought is electromagnetic damping force which was produced by ERSA mechanism. From the result of the test, it can be concluded that ERSA installation is not very impactful towards efficiency value of shock absorber because the value is still below 10%.
Appropriate Technology Applications Rice Weed Wover Tool in Kenagarian Sungai Duo
Authors: Refdina  , Ardi Junil , Syahri Budi
Published: August 2020

This community service activity aims to overcome problems and assist farmers in the process of handling rice. From the results of the initial review of the service team in the Sungai Duo area, there are several problems or problems faced by rice farmers. Problems faced by farmers in weeding activities. Weeds, which are pests in the form of wild plants among rice plants, are a threat to the growth and development of rice. Usually farmers overcome this problem by pulling out weeds manually, no machine has ever been known to farmers to overcome the weed problem. This activity requires a lot of energy and a long time. This complaint is a problem that will be given a solution. Through this dedication activity, the dedication team offers innovations in making weed removal equipment using machines. The science and technology offered in this activity is the use of a 55 cc engine as a wheel barrow and will be transmitted on a blade designed to eradicate rice weeds. Weed weeding machine innovations were made in a fabrication workshop majoring in Mechanical Engineering, Faculty of Engineering, Universitas Negeri Padang. Making machines involves students to help the service team in carrying out this activity. From the results of the analysis of innovation weed weeding machines are able to do weeding sugar quickly which is 1 Ha within 2 hours. The results of this innovation were handed over to the target audience, namely farmer groups in the Sungai Duo area of Sitiung District, Dharmasraya Regency. In the handover activity of the religion and farmer groups, they were very happy to welcome this tool. Farmers say thank you for the innovation and attention of universities to the people who are far from the center of the provincial capital.
The Feasibility Test of Physical and Chemical Peoperties Of Muaro Binguang Pasaman Barat Iron Sand For Semen Padang
Authors: Fadhilah  , Prabowo Heri , Saldi Trigamela
Published: August 2020

The purpose of this study was to examine the physical and chemical feasibility of iron sand on the west coast of Muaro Bingguang west Pasaman. This research needs to be done because the west coast of the island of Sumatra is known to be rich in iron sand and Semen Padang as a large company in West Sumatra needs iron sand to mix its cement. Test physical properties by calculating specific gravity, determine the characteristics of iron sand, and susceptibility of iron sand magnets. 5 sample bags were taken at coordinates S004′46.49 ″E99046′6.33″, S005′8.93 ″E99046′2.34″, S007′39.40 ″E99045′25.60″, S008′20.60 ″E99044′55,5″, and S008′39.00 ″E99044′55.4″. While the chemical feasibility test is done by testing the sample using XRF. The results of this study obtained, the average iron sand density of 2.99-4.23, iron sand including superparamagnetic with magnetic susceptibility 4,947 ×10-6m3kg-1– 14,946 ×10-6m3kg-1. Based on XRF analysis, iron sand is in accordance with Padang’s cement needs in making portlant cement Fe2O3 = 10% - 35% and TiO2 = 1% - 3%.
Design Of Instrument Explosive Power Leg Muscles Sensor Based
Authors: Ihsan Nurul , Bafirman  , Sujana Asep , Permana Anton Yus
Published: August 2020

Explosive power is an important factor in sports. The aim of this research is to design a sensor-based leg muscle explosive power instrument that is suitable with the characteristics of the explosive power, which has a working unit kg.m / s. and instruments that are effective, efficient and economical. development research was carried out by adapting the Borg & Gall model. This study involved 4 experts as validator tools for validation tests namely tests and measurements, exercise physiology, training science and IT. Data collected using a questionnaire. the results obtained from expert validation are an average percentage of 91%. The conclusion of this study is that the design and work of the developed instrument is acceptable or feasible to be developed.
Weights optimization using Firefly Algorithm on optimal control of zika disease from dengue symptoms by vaccination
Authors: Rahmalia Dinita , Herlambang Teguh , Rohmah Awawin Mustana , Muhith Abdul
Published: August 2020

Zika disease is caused by zika virus. Zika virus can be contagious through the Aedes biting, such as Aedes aegypti. The mosquitoes can also transmit dengue fever. From the problem of zika spread, then in this research can be constructed mathematical model of zika spread from dengue symptoms. In zika spread from dengue symptoms, there are two populations included i.e. human population as host and mosquito population as vector. Because the treatments for zika disease are unavailable, then vaccination is given to susceptible human. Optimal control is used for minimizing the number of infected human and the cost of vaccination. Due to the cost of objective function depends on weights, in this research we will apply Firefly Algorithm (FA) to optimize weights minimizing cost of objective function. FA is based on behavior of flashing characteristics of fireflies. Simulations have been applied and we can obtain comparison the number of human and mosquito with and without control. In addition, we also obtain optimal weight related to the number of infected human and the cost of vaccination.
Improving the Numeracy Mathematics Ability: The Role of Abacus Learning Model
Authors: Anam Fatkul , Suteja Jefry Ravanely , Septianto Andre , Purnomo Agung , Utami Yuni Putri
Published: August 2020

The addition and subtraction materials in mathematics were considered to be difficult to understand by most elementary school students. The aimed of this study was to improve the ability to calculate the addition and subtraction of numbers in mixed count material in mathematics using the Abacus learning model in second grade students of Elementary School Kebraon II Surabaya, Indonesia. This study was an action research employing the Abacus learning model with the Kurt Lewin model approach with two cycles and consists of four main steps for each cycle: planning, action, observation, and reflection. The data were gathered through documentation, interview, observation, and tests. The data analysis was done by using the individual and classical learning mastery. The results of this research indicated that the implementation of the Abacus learning model can improve the second grade students score of Elementary School Kebraon II Surabaya, Indonesia up to 86.66% and can raise the learning achievement process as “Good” criteria between teachers and students.
System of Linear Equation Problem Solving: Descriptive-Study about Students’ Mathematical Connection Ability
Authors: Hidayati V R , Maulyda M A , Gunawan G , Rahmatih A N , Erfan M
Published: August 2020

Algebra is one of the fields in mathematics studied by secondary school students. The students’ ability to solve algebra problems is still low. This is due to their lack of ability to solve real-world problems. This is because their mathematical connection capabilities are also not good. Mathematical connection ability is one of the standard processes in learning mathematics. The purpose of this study was to describe the mathematical connection ability of secondary school students in solving algebra problems. This research method is descriptive-qualitative. The research subjects were each high, medium, and low ability secondary school student. The data obtained is the result of subjects’ work in solving systems of three-variable linear equations. Subjects’ work outcomes will be analyzed based on indicators of mathematical connection ability. The results of this study are high, medium, and low ability students able to meet several indicators in recognizing and using some ideas or concepts in mathematics. Students can understand how the concepts of mathematics are interconnected. Only highly capable student shows indicators of the application of mathematics in daily life problem.
Integrated Mathematics Development
Authors: Juariah J , Sobarningsih N , Nurdiansyah R , Sugilar H , Anggraini D , Kariadinata R
Published: August 2020

The purpose of this research is to find out the process of developing integrated mathematical problems (Islamic nuanced questions) in class VII social arithmetic material; the results of integrated questions on class VII social arithmetic; and students’ attitudes towards integrated questions in class VII arithmetic social material. This study uses a 4-D (Four-D) development method which consists of 4 stages, namely the define stage, the design stage, the development stage and the dissemination stage, the subjects of this study are Grade VIII students one of the schools in Sukabumi Regency and Bandung City, West Java. The results show that the integrated question development process uses four stages of development; the results obtained from the question development and trial phase, obtained eight integrated questions that have been validated by experts and question criteria consisting of validity, reliability, different strengths, and overall difficulty level in a valid and good category; Student attitudes towards integrated questions with the excellent and positive categories towards integrated questions are developed. The results of this study will be able to assist teachers in presenting integrated mathematical problems or those related to daily ritual worship activities.
The Influence of Working Backward Problem Solving Strategy Towards Mathematical Reasoning Ability in Terms of Students’ Emotional Intelligence
Authors: Kusumayanti Andi , Abrar Andi Ika Prasasti , Wirdayani Besse , Rasyid Muhammad Rusydi , Yuliany Nur
Published: August 2020

The study aimed to know the description of student’s mathematical reasoning ability and student’s emotional intelligence, to find out whether there were differences in the mathematical reasoning ability between students who used and those who did not use working backward problem solving strategy, identify whether there were differences in mathematical reasoning ability between students who used and those who did not use working backward problem solving strategy in terms of the emotional intelligence, and to find out whether there was an influence of interaction on the working backward problem solving strategy towards the mathematical reasoning ability in terms of the emotional intelligence of the students of grade VIII of MTsN 1 Makassar. The study used the quantitative approach with 3×2 factorial design. The population of the study were the students of grade VIII of MTsN 1 Makassar consisting of 440 students with 80 students as the samples (2 classes). The data analysis technique used was descriptive statistical and inferential statistical analysis. The findings of the study showed that (1) the mathematical reasoning ability of the students who used and those who did not use the working backward problem solving strategy were in the high category, meanwhile the students’ emotional intelligence was in the medium category, (2)there were differences in the mathematical reasoning abilities between students who used and those who did not use working backward problem solving strategy, (3)there were differences in mathematical reasoning ability between students who used and those who did not use working backward problem solving strategy in terms of student’s emotional intelligence, and (4)there was no interaction effect of working backward problem solving strategy towards the mathematical reasoning ability in terms of the emotional intelligence of the students of grade VIII of MTsN 1 Makassar
Effectiveness of Android-Based Mathematics Learning Media Application on Student Learning Achievement
Authors: Wahid Abd Hamid , Najiburrahman  , Rahman Kholilur , Faiz  , Qodriyah Khodijatul , Hambali  , El Iq Bali Muhammad Mushfi , Baharun Hasan , Muali Chusnul
Published: August 2020

This study aims to implement android-based learning media in mathematics basic concepts courses on student achievement, and the effectiveness of android-based learning media in mathematics basic concepts courses on student achievement at PGMI Nurul Jadid University. This research uses a quantitative research approach. The data collection is done through documentation and tests. The determination of the sample of this research was carried out by random sampling technique which included the fourth-semester PGMI Study Program students. While the data analysis in this study uses paired sample t-test analysis techniques. Based on the results of data analysis, it can be concluded that t-count = -18,378 with significance = 0,000 < 0.01. Thus, it can be stated that H1 is accepted and H0 is rejected, so it can be concluded that the android-based learning media on the subject of mathematics basic concepts are convincingly effective in improving student achievement.
Reflection of Alpha Theta Brain Waves to Increase Student Interests
Authors: Septantiningtyas Niken , Umar  , Ma’rufi Anwar , Mukaromah Hajar , Widat Faizatul , Laily Nur , Sari Ita Purnama , Enggal L Wiwin , Suib Mohammad Syaiful
Published: August 2020

This research is a quantitative study, which aims to find the effect of alpha theta brainwave reflection on student learning interest in the PGMI study program at the Islamic Faculty of Nurul Jadid University, Paiton, Probolinggo, East Java, Indonesia. The results showed that this wave can be achieved by performing a series of techniques to relax and calm the mind naturally to reach a point of clarity of focus and wisdom. In this wave phase one easily understands and memorizes something new, and fosters enthusiasm and interest in learning new information.
Characteristic of Areca Fiber Briquettes as Alternative Energy
Authors: Hasanuddin  , Nurdin H , Waskito  , Sari Delima Yanti
Published: August 2020

The level of demand and use of fuel oil in Indonesia has exceeded domestic production. So that the acceleration of the choice of alternative energy adoption becomes a step and effort to overcome this problem. Efforts to develop a diversified solid fuel product program in the form of areca-based fiber briquettes are the choice. Areca nut is a natural fiber derived from Areca Catechu which has the potential to be used as a raw material for making briquettes which has only been a waste in the community. The experimental method carried out in the manufacture of briquettes is a mixture of areca fiber (particle) and tapioca adhesive in a variation ratio of areca fiber concentration of 90%, 80%, 70%, and 60%. This research resulted in the characteristics of areca fiber briquettes with a concentration variation of 80% of areca fiber and 20% tapioca adhesive which has the highest heating value of 12352.9 kJ/kg with a density of 318.71 kg/m3. Success in processing and producing briquettes in correctional facilities can reduce dependence on fuel oil. Areca fiber-based briquette development as an effort to get alternative energy that has quality products. The use of areca fiber waste as an alternative fuel substitute can be realized in the community to achieve national energy security through the process of applying technology.
Preparation of Ganyong (Canna discolour) Starch Bioplastic with the Addition Of Sirih (Piper betle) Leaf Extract
Authors: Sedyadi Endaruji , Yuliati Ria Tri
Published: August 2020

Bioplastic production of canna starch with the addition of sirih leaf extract has been done. This study aims to determine the relationship between the additions of sirih leaf extract to the physical properties of canna starch bioplastic. Bioplastic characteristics were studied by measuring thickness, tensile strength, elongation, modulus young and wvtr. This research was conducted in three stages, the extraction of sirih leaf, preparations of canna tuber bioplastic and canna tuber bioplastic with the addition of sirih leaf extract. The results showed that the bioplastics had a thickness of 0.083 mm, a tensile strength of 3.11 mpa, 27.62′ elongation, modulus young 0,1126 mpa and wvtr 7.24 grams / m2 hour. The addition of sirih leaf extract has a strong effect on changes in tensile strength, elongation, modulus young and wvtr
Phenotypic Performance of Expected Lines of Upland Functional Black Rice Resulted from Bulk Selection
Authors: Aryana I G P M , Sutresna I W , Hemon A F , Kisman
Published: August 2020

This study aimed to know the phenotypic performance of the quantitative character of black rice expected lines resulted from bulk selection. The experimental method was used in this study by using Randomized Completely Block Design (RCBD) with two replicates. The genetic materials used in this study were 18 rice genotypes consisting of 16 black rice expected lines from bulk selection and two genotypes of parents (Baas Selem and Situ Patenggang). Each genotype was planted in 1 m × 10 m plots, planting space of 25 cm × 25 cm with 1 plant per clump, and conducted at paddy fields in the village of Nyurlembang, Narmada, West Lombok. The study was carried out for 4 months started from February to June 2018. Maintaining the plants includes weeding, pest control, fertilization with 300 kg ha−1 Ponska and 200 kg ha−1 Urea. Results of the study showed that: There were significant differences of harvest date, plant height, number of productive tiller per clump, panicle length, number of filled grains and empty grains, 100 grains weight, and grain yield per hectare. The G12 line was the highest yield (8.25 tons ha−1) which is supported by yield components such as the number of filled grains per panicle (154.63 grains), panicle length (25.08 cm) and the number of productive tillers per clumps (25.80 plants). The grain yield of G12 was not significantly differed from both parent, Situ Patenggang (7.25 tons ha−1) and Baas Selem (6.59 tons ha−1).
“I Am Starting to Believe in the Word ‘Justice’”: Lessons from an Ethnographic Study on Community Courts
Authors: Gal Tali , Dancig-Rosenberg Hadar
Published: August 2020

With the growing awareness of the crisis of mass incarceration and distrust toward the legal system, recent years have seen a rise in interest in specialized, problem-solving, and therapeutic courts designed to reduce incarceration and recidivism rates and enhance public trust in state authorities. Community courts have been operating in numerous jurisdictions worldwide, providing a non-adversarial platform in which repeat low-level offenders are offered a comprehensive rehabilitative and restorative intervention program. Alongside evaluations demonstrating the ability of community courts to reduce incarceration and enhance offenders’ trust, some critics have suggested that community courts jeopardize offenders’ procedural rights and result in over-criminalization of program non-completers. This Article provides a qualitative empirical examination of an Israeli community court model, inspired by the Red Hook Community Justice Center in Brooklyn, New York. Based on over 280 hours of observations of approximately 100 hearings and fourteen staff meetings, the findings provide an inside look at the ways in which Israeli community courts implement a range of evidence-based, democracy-oriented approaches to crime control, such as procedural justice, therapeutic jurisprudence, and community justice, in the context of community courts. The findings also point to a need to pay closer attention to how these courts continue their operation, within a broader adversarial legal framework of criminal justice. The challenges identified in this Article raise questions that are relevant to other community courts in the United States and elsewhere.
Apical hypertrophic cardiomyopathy with left ventricular apical aneurysm: prevalence, cardiac magnetic resonance characteristics, and prognosis
Authors: Yang Kai , Song Yan-Yan , Chen Xiu-Yu , Wang Jia-Xin , Li Lu , Yin Gang , Zheng Yu-Cong , Wei Meng-Die , Lu Min-Jie , Zhao Shi-Hua
Published: August 2020

Aims

Hypertrophic cardiomyopathy (HCM) with left ventricular apical aneurysm (LVAA) is associated with an increased risk of adverse cardiovascular events. However, the clinical significance of LVAA in apical HCM (ApHCM) has not been reported. This study aimed to investigate the prevalence, cardiac magnetic resonance (CMR) characteristics, and prognosis of LVAA in ApHCM patients.

Methods and results

A total of 1332 consecutive ApHCM patients confirmed by CMR in our hospital were retrospectively analysed. LVAAs were identified in 31 patients of all ApHCM patients (2.3%, 31/1332). Besides, 31 age- and gender-matched ApHCM patients without LVAA were used for comparison. Of the 31 aneurysm patients (mean age, 53.8 ± 15.1 years old), 28 (90.3%) had clinical symptoms, and 3 (9.7%) had a family history of HCM. The rate of missed diagnosis of echocardiography for detecting LVAA was 64.5% (20/31), most (90%, 18/20) of unidentified LVAAs by echocardiography were small aneurysms (<20 mm). Compared with ApHCM patients without LVAA, the proportion of systolic mid-cavity obstruction and late gadolinium enhancement (LGE) presence, and the LGE extent in ApHCM patients with LVAA were significantly higher (all P<0.05). The Kaplan–Meier curves showed that the event-free survival rate in ApHCM patients with LVAA was significantly lower than that in ApHCM patients without LVAA (log rank, P = 0.010).

Conclusion

ApHCM with LVAA is a very rare condition, which is often missed by echocardiography and could be reliably detected with CMR and is associated with a higher risk of adverse cardiovascular events compared with ApHCM without LVAA.
Efficacy and safety of ablation index-guided catheter ablation for atrial fibrillation: an updated meta-analysis
Authors: Ioannou Adam , Papageorgiou Nikolaos , Lim Wei Yao , Wongwarawipat Tanakal , Hunter Ross J , Dhillon Gurpreet , Schilling Richard J , Creta Antonio , El Haddad Milad , Duytschaever Matthias , Hussein Ahmed , Dhiraj Gupta , Ahsan Syed , Providencia Rui
Published: August 2020

Aims 

Despite recent advances in catheter ablation for atrial fibrillation (AF), pulmonary vein reconnection (PVR), and AF recurrence remain significantly high. Ablation index (AI) is a new method incorporating contact force, time, and power that should optimize procedural outcomes. We aimed to evaluate the efficacy and safety of AI-guided catheter ablation compared to a non-AI-guided approach.

Methods and results 

A systematic search was performed on MEDLINE (via PubMED), EMBASE, COCHRANE, and European Society of Cardiology (ESC) databases (from inception to 1 July 2019). We included only studies that compared AI-guided with non-AI-guided catheter ablation of AF. Eleven studies reporting on 2306 patients were identified. Median follow-up period was 12 months. Ablation index-guided ablation had a significant shorter procedural time (141.0 vs. 152.8 min, P = 0.01; I2 = 90%), ablation time (21.8 vs. 32.0 min, P < 0.00001; I2 = 0%), achieved first-pass isolation more frequently [odds ratio (OR) = 0.09, 95%CI 0.04–0.21; 93.4% vs. 62.9%, P < 0.001; I2 = 58%] and was less frequently associated with acute PVR (OR = 0.37, 95%CI 0.18–0.75; 18.0% vs 35.0%; P = 0.006; I2 = 0%). Importantly, atrial arrhythmia relapse post-blanking was significantly lower in AI compared to non-AI catheter ablation (OR = 0.41, 95%CI 0.25–0.66; 11.8% vs. 24.9%, P = 0.0003; I2 = 35%). Finally, there was no difference in complication rate between AI and non-AI ablation, with the number of cardiac tamponade events in the AI group less being numerically lower (OR = 0.69, 95%CI 0.30–1.60, 1.6% vs. 2.5%, P = 0.39; I2 = 0%).

Conclusions 

These data suggest that AI-guided catheter ablation is associated with increased efficacy of AF ablation, while preserving a comparable safety profile to non-AI catheter ablation.
Graph2GO: a multi-modal attributed network embedding method for inferring protein functions
Authors: Fan Kunjie , Guan Yuanfang , Zhang Yan
Published: August 2020

Background

Identifying protein functions is important for many biological applications. Since experimental functional characterization of proteins is time-consuming and costly, accurate and efficient computational methods for predicting protein functions are in great demand for generating the testable hypotheses guiding large-scale experiments.“

Results

Here, we propose Graph2GO, a multi-modal graph-based representation learning model that can integrate heterogeneous information, including multiple types of interaction networks (sequence similarity network and protein-protein interaction network) and protein features (amino acid sequence, subcellular location, and protein domains) to predict protein functions on gene ontology. Comparing Graph2GO to BLAST, as a baseline model, and to two popular protein function prediction methods (Mashup and deepNF), we demonstrated that our model can achieve state-of-the-art performance. We show the robustness of our model by testing on multiple species. We also provide a web server supporting function query and downstream analysis on-the-fly.

Conclusions

Graph2GO is the first model that has utilized attributed network representation learning methods to model both interaction networks and protein features for predicting protein functions, and achieved promising performance. Our model can be easily extended to include more protein features to further improve the performance. Besides, Graph2GO is also applicable to other application scenarios involving biological networks, and the learned latent representations can be used as feature inputs for machine learning tasks in various downstream analyses.
Legal terms of use and public genealogy websites
Authors: Contreras Jorge L , Schultz Kyle , Teerlink Craig C , Maness Tim , Meyer Laurence J , Cannon-Albright Lisa A
Published: August 2020

Public genealogy websites, to which individuals upload family history, genealogy, and sometimes individual genetic data, have been used in an increasing number of public health, epidemiological, and genetic studies. Yet there is little awareness among researchers of the legal rules that govern the use of these online resources. We analyzed the online Terms of Use (TOU) applicable to 17 popular genealogy websites and found that none of them expressly permit scientific research, while at least 13 contain restrictions that may limit or prohibit scientific research using data obtained from those sites. In order to ensure that researchers who use genealogy and other data from these sites for public health and other scientific research purposes do not inadvertently breach applicable TOUs, we recommend that genealogy website operators consider revising their TOUs to permit this activity.