bluuebunny/crossref_metadata_2025 huggingface dataset:
Antibacterial effects of Pheretima javanica extract and bioactive chemical analysis using Gas Chromatography Mass Spectrum
Authors: Budayatin  , Waluyo J , Wahyuni D , Dafik
Published: January 2021

Pheretima sp is an earthworm from the Oligochaeta group found mostly in Java. The characteristics has segments reaching 95-150 segments. Clitellum is located in segment 14-16. The body fluids contain protein, amino acids and various enzymes. The purpose of this study was to determine the composition of bioactive compounds and evaluate antibacterial activity. The method used was maceration, antibacterial test against Salmonella typhi and GCMS analysis to identify bioactive compounds. Antibacterial test showed the inhibition zone diameter ranged from 15 to 20 mm. The identification of bioactive compounds is based on the percentage area, percentage peak height, retention time, molecular weight and pharmacological action. GC-MS analysis showed the presence of 50 peaks of compounds. Bioactive compounds which are antibacterial are 1) Nitrogen oxide (N2O) (CAS) Nitrous oxide with an area 2.03%, height 7.36%, retention time 1.361, molecular weight 44.013 g/mol; 2) Acetic acid (CAS) Ethylic acid with an area 17.02%, height 29.03%, retention time 1.789, and molecular weight 60.05 g/mol; 3) Butanoic acid, 3-methyl-(CAS) Isovaleric acid with an area of 3.27%, height 2.04%, 3.456, molecular weight 102.13 g/mol; 4) 1,2-Benzenedicarboxylic acid, diethyl ester (CAS) with an area 0.95%, height 1.32%, retention time 36.306 and molecular weight 222.24 g/mol.
Analysis of the Effect of Several Types of Shade on the Productivity of Robusta Coffee
Authors: Khusnul K , Suratno  , Asyiah N. I , Hariyadi S
Published: January 2021

Coffee is a commodity that plays an important role in economic activity and is Indonesia’s leading export which contributes to foreign exchange for the country. The coffee market opportunity is quite potential due to increased export demand and domestic consumption. But when viewed from the development of the number of coffee productivity per year has decreased every year. The decline in coffee productivity was caused by many factors, one of which was the coffee shade plant. The purpose of this study was to analyze the factors that influence the types of coffee shade plants so that they have an impact on the level of coffee productivity. This study used 25 farmers as respondents in Jember Regency and Banyuwangi Regency. Observations on one of the coffee plantations in the Jember area with four different types of shade. The research variables to be measured include biotic factors, abiotic factors and management and productivity of coffee. Data collection used interviews and direct observations on coffee plantations. The results of this study indicate that different types of shade plants have an effect on coffee productivity. The results of measurement of biotic and abiotic factors present in each shade mostly have different results. With different factor levels, it will affect coffee growth which will affect the number of coffee cherries produced so that each type of shade has a different amount of productivity. For one year Gliricidia sepium has an average productivity yield of 2500 kg / hectare, Carica papaya has an average productivity yield of 1000 kg / hectare, Tectona grandis has an average productivity yield of 700 kg / hectare, and Falacataria mollucana has an average productivity of 450 kg / acres. The conclusion of this study is the use of different shade plants affects coffee productivity.
Application of nano electrode Ag/AgCl on potentiometric sensor based on molecularly imprinted polymer (MIP) to verify caffeine
Authors: Yanto F , Royani I , Suheryanto
Published: January 2021

Caffeine of Molecularly Imprinted Polymer (MIP) has been synthesized by the cooling-heating method and to obtain sensor material to detect caffeine. The caffeine is verified through a potentiometric method based on galvanic cells involving anodes and cathodes. MIP of caffeine that has been made function as a cathode or working electrode and the modified of the Ag/AgCl reference electrode that made by reducing the AgCl membrane to nano size (44.45 nm) function as an anode. Then the modified Ag/AgCl reference electrode performance test is compared to the standard AgCl reference electrode. The result has shown the modified Ag/AgCl reference electrode produces linearity of the calibration curve in testing caffeine solutions with a concentration range of 0.1 ppm to 5.0 ppm. Based on the result of the modified Ag/AgCl reference electrode’s test range, we got the linearity coefficient value of 0.9993, with a slope of 0.9693 and an intercept of 0.1306. Generated accuracy calculation resulted in a value of 98.85% and a precision of 0.951%. The result of the lower limit of detection (LoD) was at a concentration of 0.2 ppm and the limit of quantification (LoQ) at a concentration of 0.4 ppm. Thus, it concluded that the modified Ag/AgCl reference electrode has the same or equivalent capability as a standard electrode.
Comparative study of Cladophora sp. cellulose by using FTIR and XRD
Authors: Suciyati S W , Manurung P , Sembiring S , Situmeang R
Published: January 2021

Cellulose CrystallineCladophorasp. (CCC) was successfully isolated from the freshwater algaeCladophorasp. by used the hydrolysis method. The alkaline treatment can affect the structure of CCC that is showed by the spectrum of Fourier Transform Infrared (FTIR). The typical range for lignin does not appear here, which indicates the delignification process using NaOH plus hydrolysis of HCl has succeeded in removing lignin. The spectrum associated with functional group impurity (1800-1050 cm−1) with lipid, protein, and nucleid acid content are still seen after alkaline treatment and acid hydrolysis. Analysis of crystallinity with X-ray Diffraction (XRD) data showed that CCC had the highest crystallinity index on CD-K (93.4%), Cd-P (66.6%), and Cd-S (63.04%). The smallest particle size for each cellulose is Cd-K (9.5 nm), Cd-S (25.23 nm), and Cd-P (49.57 nm). Based on these results, the CCC production fromCladophorasp. using alkaline and acid hydrolysis treatment is enough to get samples with high crystallinity. The CCC product has the potential to be an excellent reinforcing material for biomaterial-based polymer materials.
Simulation of NO2 work function-based sensor signal on ZnO
Authors: Marjunus R. , Kekalenteu D.C. , Riyanto A. , Widanarto W.
Published: January 2021

Simulation of sensor signal based on the ZnO work function for NO2 gas has been conducted. This research is aimed at approaching the experiment results of nitrogen dioxide (NO2) gas detection using the ZnO sensor. This study uses three reactions i.e., adsorption-desorption of O2 (oxygen), adsorption-desorption of NO2, and the reaction of O2 and NO2 on ZnO. This simulation has optimized 12 parameter values that are responsible for those reactions. After the optimized values were obtained, the final simulation was reached. The final simulation still cannot perfectly fit the experiment results because of the number of reactions which are used still three reactions. It is predicted, if it is used much more reactions, the simulation could be the same as the experiment results. Although this simulation is still not same as the experiment result, it has a trend as the experiment result. The last result of this model i.e. it can predict the coverage of O atom, O2 molecule, and NO2 molecule.
The Use of SIMCA Method and NIR Spectroscopy with Hand-Held Spectrometers Equipped with Integrating Sphere for Classification of Two Different Indonesian Specialty Coffees
Authors: Suhandy D , Yulia M , Kuroki S , Nakano K
Published: January 2021

The objective of this study is to evaluate the SIMCA method and NIR spectroscopy for the non-invasive and non-destructive classification of Indonesian specialty coffees that come from two geographical origins: Gayo coffee from Aceh 10 samples and Wamena from Papua 10 samples. All samples were roasted at the same condition (medium roasting at a temperature of 200°C for 10 minutes) and were ground using a home coffee grinder and then sieved using 50 mesh to obtain a homogenous particle size of 297 micrometers. Spectral data in the short and long near infrared range of 650–1650 nm was measured in a diffuse reflectance mode using two handheld spectrometers equipped with an integrating sphere (ISP-REF, Ocean Optics, USA). The result demonstrated that the classification was satisfied with 100% accuracy, sensitivity, and specificity.
Transition Energy, Spectral Fine Structure, and Absorption Coefficient of Norbixin (9’-cis-6,6’-diapocarotene-6,6’dioic acid) in Different Polar Solvents
Authors: Rahmalia W , Naselia U A
Published: January 2021

Transition energy, spectral fine structure, and absorption coefficient of norbixin in different polar solvents has been investigated. Eight polar solvents were used for dissolving norbixin separately, including methanol, ethanol, propylene carbonate, acetone, dichloromethane, ethyl acetate, chloroform, and dimethyl carbonate. Spectra of norbixin in the resulting solutions were determined by UV-visible spectrophotometry at atmosphere condition. The effect of solvents on transition energy was analyzed according to Onsager cavity model and Hansen theory. The approximate absorption coefficient was determined with the Beer-Lambert law. The result show that the UV-visible absorption spectra of norbixin depend onz the solvent. The greater the refraction index of the solvent and the norbixin-solvent dispersion interaction cause the transition energy of norbixin was smaller. The change in spectral fine structure has some relevance or correlation with the solvatochromic effect on π → π* transitions, the intermolecular interactions, and the S2 state of norbixin. The absorbance of norbixin in various solvents, increased linearly with concentration.
Modification of Activated Carbon from Elaeis Guineensis Jacq Shell with Magnetite (Fe3O4) Particles and Study Adsorption-Desorption on Ni(II) Ions in Solution
Authors: Zulaicha A S , Buhani  , Suharso
Published: January 2021

Activated carbon coated with magnetite (ACA-Fe3O4) was synthesized in this study. Activated carbon was synthesized using an Elaeis Guineensis Jacq (EGJ) as a raw material followed by physical and chemical activation. Physical activation is carried out by heating at a temperature of 700°C and followed by a reaction with H3PO4 solution as chemical activation. Furthermore, the activated carbon was reacted with a mixture of FeCl3 and FeSO4 solution then followed by the addition of NaOH solution up to a pH of 10. Characterization with X-Ray Diffraction (XRD) and Scanning Electron Microscopy - Energy Dispersive X-Ray (SEM-EDX) on ACA-Fe3O4 was done to confirm that magnetite has succeeded to coating on ACA. Brunauer-Emmett-Teller Surface Area Method (SBET) confirmed that pore volume and average pore diameter increase with the presence of magnetite. Optimum conditions for Ni(II) ion adsorption with ACA-Fe3O4 was under conditions of 0.5 grams adsorbent, 25 mL of Ni(II) ion solution 100 ppm, and contact time of 1 hour with the acquisition of 99.11%. Adsorption process more suitable with pseudo-second-order and Langmuir adsorption isotherm pattern. Desorption of Ni(II) ion of 70.84% using HCl.
Biogasoline production by zeolite-A catalyzed co-pyrolysis of torrefied cassava root and palm oil
Authors: Simanjuntak W , Pandiangan K D , Sembiring Z , Sihombing I P
Published: January 2021

In this study, cassava root was subjected to torrefaction pretreatment prior to catalytic pyrolysis, with the main objective to investigate the effect of torrefaction time on chemical composition of bio crude oil (BCO) distillate resulted. For this purpose, the root was torrefied at 200°C for 30, 60, 90, and 120 minutes. The torrefied samples were then mixed with palm oil and then pyrolyzed at 450 °C in the presence of zeolite-A, prepared from rice husk silica (RHS) and food grade aluminum foil, as catalyst. A sample without torrefaction was pyrolyzed in a similar condition for comparison. The bio-crude oil (BCO) obtained was distilled at 150 °C, and the chemical composition of the distillate was determined using gas chromatography-mass spectrometry (GC-MS) method. The components of the distillates produced from torrefied samples are composed of mainly C6-C13 hydrocarbons, which are considered as biogasoline, while that produced from the sample without torrefaction was found to contain ketone in addition to hydrocarbon. The experimental results also demonstrate that the chemical compositions of the BCO distillates produced from the samples torrefied at 30, 60, and 90 minutes are not significantly different, but significantly different composition was observed for the sample torrefied at 120 °C.
Isolation and Identification of Terpenoid Compound from Vetiver Grass-Root (Vetiveria zizanioides Stapf) as a Repellent against Termite (Cyrptotermes sp.) through Bioactivity Assay
Authors: Bahri S , Raharjo T T , Ambarwati Y , Nurhasanah
Published: January 2021

This study reported the isolated compound from vetiver grass-root (Vetiveria zizanioides Stapf) have bioactivity as a repellant against termites. The compounds were extracted by n-hexane solvent using the soxhletation method. The compounds were tested through bioactivity assay using wood pieces added isolated compound as a sample on the final assay, acetone as a blank, and wood pieces without treatment as a control. The result showed that the isolated compound was acquired by separation and purification in the form of colorless oil 0.0225 g. Of the thin-layer chromatography (TLC) assay using eluents of n-Hexane eluent 100%, n-Hexane : DCM 95%, and n-Hexane : Acetone 70%, were obtained a red-purple spot and Rf values which are 0.27, 0.59, and 0.91, respectively. 2-methyl butane-1-amine (C5H13N) was supposed by the structure elucidation of the isolated compound. The molecular weight was 87.1 g/mol as a precursor terpenoid based on the spectrum examination of FTIR and GC-MS. The bioactivity showed that an isolated compound has acted as a repellent against termite (Cryptotermes sp.) with % attractive (0.025 %) and attractiveness index (AI) (-0.039). A negative value of AI indicated that the compound is potential as a repellent against termites.
Utilization of zeolite H-MOR based on bagasse ash silica as a catalyst for the hydrolysis reaction of cassava peel cellulose for glucose production
Authors: Rilyanti M , Faidah U N , Suharso S , Pandiangan K D , Ilim I
Published: January 2021

Bagasse and cassava peel are waste that can be increased economic value. In this study, we have successfully synthesized zeolite H-MOR from sugarcane bagasse ash (SCBA) silica using the Steam-Assisted Crystallization (SAC) method at 170°C for 120 hours and determined its catalytic activity on the hydrolysis of cassava peel starch to produce glucose. H-MOR synthesized using LUDOX (commercial silica) was used as a comparison. The results showed that the MOR zeolite synthesized using SCBA and LUDOX silica had a crystallinity of 92.12% and 81.17%, respectively. The cellulose content in cassava peel flour is 57.8%. Optimization of the catalytic test variable showed that the hydrolysis of cellulose occurred at 140°C for 4 hours with a 1: 1 ratio of catalyst and substrate. The glucose concentrations obtained from cellulose hydrolysis using zeolite H-MOR catalyst from SCBA and Ludox were 398.5 ppm and 237.45 ppm with conversion degrees of 60.4% and 61.2%, respectively.
Creative thinking skill for pre-service physics teacher: An investigation in the topics of radioactivity
Authors: Hartini S , Liliasari S , Sinaga P , Abdullah A G
Published: January 2021

Creative thinking skills are one of the 21st century skills that are important to support the long-term success of individuals, companies, industries, and countries, so they need to be provided to students. This study aims to examine the creative thinking skills of pre-service physics teacher students in radioactivity case. Quantitative descriptive method is used in this research. The subjects of this study were 22 final year pre-service physics teacher students at one of in Institute of Teachers Training Banjarmasin, South Kalimantan. The instrument used in this research is a creative thinking skill test in the form of an essay based on indicators objective finding, fact finding, problem finding, idea finding, solution finding, and acceptance finding. The results showed that the students’ creative thinking skills were categorized as not creative. An improvement effort is needed in the lecture activities to improve students’ creative thinking skills
The effect of disaster knowledge and public attitudes on the preparedness to face landslide disaster
Authors: Hatibe A , Salam A , Ali M , Gustina
Published: January 2021

Landslide often occur in Central Sulawesi province, on 28thof October 2018 an earthquake of 5 to 7.4 on the Richter scale (sr) rocked the city of Palu and along the Palu-Donggala, the epicenter of 27 km Northeast of Donggala and 80 km Northwest of Palu city. The problem was how much the effect of knowledge of disasters and community preparedness influenced the ability to face landslide natural disasters. This study aimed to analyze and test the influence of disaster knowledge and community attitudes towards landslide preparedness by using quantitative methods with an explanatory survey approach. The sample were 99 people from 116,084 people who live in Banawa along with Palu-Donggala and West Palu and Ulujadi Districts, Palu city. The test results used simple regression (t-test) in which there was a positive and significant influence on disaster knowledge and community attitudes towards preparedness. Meanwhile, based on multiple regression testing (F-test), it had a positive effect on disaster knowledge and community attitudes simultaneously and significantly towards landslide preparedness. The value of R square (R2) was 0.797, indicating that knowledge of disasters and community attitudes simultaneously influenced 79.7% of landslide preparedness, the remaining 20.3% was influenced by other variables which were not studied here.
Electronic practicum module based on scientific argumentation as a practicum medium of motion and force in the covid-19 pandemic
Authors: Dinata P A C , Rasidah  , Wardhana V W , Misbah
Published: January 2021

The concept of motion and forces needs to be mastered by physics students through theoretical learning and scientific inquiry in the laboratory. The theory of motion and forces can be learned through online lectures and assignments. However, laboratory investigations cannot be conducted due to campus policies to study and work from home. Therefore, this research was conducted to develop practicum modules that can facilitate the practicum of motion and forces remotely. This module features videos containing experimental data and analysis guides with EPUB format to facilitate scientific argumentation ability. This article primarily discusses the content validity of the electronic module and the practicum video. The method used was expert judgment using validation questionnaires by five experts. Validation results are then converted to a five-scale score based on the ideal standard deviation to determine the product eligibility. The calculation results show that practical electronic and video modules have an excellent level of feasibility. Furthermore, the electronic practicum module based on scientific argumentation needs to be tested to determine its level of practicality and effectiveness in facilitating practicum and developing scientific argumentative ability.
Analysis of scientific argument of vocational high school students on the topic of substance change
Authors: Abdullah R. , Pikoli M. , Suleman N.
Published: January 2021

This study aims to see the ability of scientific argumentation of chemical analysis vocational high school students on the topic of changing the form of substances. This research is a qualitative descriptive study. The instrument used was a four-level multiple choice test with a validity value of 97% and a reliability of 0.83 consisting of 20 items related to the concept of changing the form of a substance. The research subjects were 173 vocational high school students majoring in chemical analysis. The results showed that the proportion of the ability of class X, XI and XII students in providing scientific arguments was 56%, 56% and 52%, respectively. These results are supported by students’ conceptual understanding of topics that change the form of substances, namely students who understand well at 34.77%; misconception error 1 of 16.16%; misconception error 2 was 8.99%; misconception error 3 is 15.84% and those who do not understand the concept are 24.25%. From the results of the study it can be ignored that students have low scientific argumentation skills due to students’ low conceptual understanding of the topic of changing the form of substances.
A profile of senior high school students’ science process skills on heat material
Authors: Prahani B K , Deta U A , Lestari N A , Yantidewi M , Jauhariyah M N R , Kelelufna V P , Siswanto J , Misbah M , Mahtari S , Suyidno
Published: January 2021

In physics learning, students need to be trained to develop Science Process Skills (SPS). This research is pre-experiment research. The main objective of this research is to analyze the profile of senior high school students’ SPS on heat material. The subjects of this research were senior high school students in Indonesia. The sample of this research was 110 students of class X senior high school, first year. Determination of the sample in this research using purposive sampling. The SPS Test Instrument (SPSTI) to determine the profile of senior high school students’ SPS on heat material. SPSTI consists of eight indicators: Formulating the problem; Formulate a hypothesis; Identifying experimental variables; Defines the operational definition of the experimental variable; Designing experimental procedures; Creating graph; Data analysis; Formulating conclusions. This instrument has been declared valid and reliable by the three experts. In the case of this research, the profile of senior high school students’ SPS on heat material is generally still at a low level. The implication of this research can be used as empirical evidence that senior high school students’ SPS on heat material still needs to be improved.
Video-based learning for “learning from home” solution in pandemic
Authors: Suryandari  , Singgih S
Published: January 2021

The COVID-19 pandemic forces the government, especially the Ministry of Education and Culture to implement the learning from the Home policy as an effort to implement social distancing as one of the health protocols to prevent the transmission of COVID-19. This policy directs teachers to be able to carry out online learning, one of which is by using instructional video media. With qualitative methods, this study examines relevant studies in order to determine the effectiveness level of using video as an online learning medium. Based on the results of the study conducted, it was found that video was a learning medium that was widely used by teachers. Learning videos make it easy for teachers to deliver the material. Furthermore, the teacher provides a formative test as a form of confirmation to students in understanding the material presented. It should be noted that the use of instructional videos that are used must be adjusted to the character of the learning material provided to students. Due to relatively difficult learning materials, instructional videos with the instructor’s views in the video can be a factor of misconceptions among students. Therefore it needs to be understood that the use of instructional videos on relatively difficult material should be applied with direct instruction by educators when watching the learning videos together. It is done as an effort to create an atmosphere of learning from home to be similar to learning at school as the teacher directs students from each material being conveyed.
Analysis of the impact of labeling on students’ interest in learning physics
Authors: Ikbal M S , Latuconsina N K , Syamsinar
Published: January 2021

This study aims to determine the relationship between labeling with students’ interest in learning physics and its impact. This type of research is a mix-method research, and the design used is a sequential explanatory design which prioritizes quantitative method in the data collection process followed by qualitative method. The research subjects consisted of 30 people as quantitative subjects and 4 of them were informants for collecting qualitative data. The instruments used were sociometry and questionnaires about students’ interest in learning physics. The results showed that labeling students had a strong relationship towards students’ interest in learning physics, where the correlation coefficient value of biserial points coefficient was rpbi = 0.61. Meanwhile, the impact of giving negative labels to students caused them to develop feelings of hurt, offense, embarrassment, insecurity, and feeling discouraged from participating in physics learning. Positive labeling has an impact in the form of feeling happy, feeling appreciated, excited to learn and increase students’ self-confidence.
The validity of the wetlands-based fluid physics practicum module
Authors: Zainuddin Z. , Mastuang M. , Misbah M.
Published: January 2021

The availability of a wetland environment-based practicum module as a form of local wisdom in South Kalimantan has not been widely developed, even though the development of a wetland-based practicum module is needed to create more meaningful learning. This study aimed to describe the validity of the fluid physics practicum module based on the wetland environment. The research method used was R&D with a 4D model. The research instrument used was in the form of a validation sheet, assessed by three validators. The results showed that the validity of the practicum module was very valid. This practicum module that was declared as valid can be used in the learning process. At the next stage, the practicality and effectiveness of the fluid physics practicum module based on the wetland environment can be measured.
A profile of physics multiple representation ability of senior high school students on heat material
Authors: Prahani B K , Deta U A , Lestari N A , Yantidewi M , RJauhariyah M N , Kelelufna V P , Siswanto J , Misbah M , Mahtari S , Suyidno S
Published: January 2021

In physics learning, students need to be trained to develop multiple representations of ability. Physics multiple representation ability is a good and developing method to instil conceptual understanding, solving physics problems and difficulties caused by a large number of involved mental images. This research is pre-experiment research. The main objective of this research is to analyze the profile of senior high school students’ physics multiple representation ability on heat material. The subjects of this research were senior high school students in Indonesia. The sample of this research was 93 students of class X senior high school, first year. Determination of the sample in this research using purposive sampling. The Physics Multiple Representation Test Instrument (PMRTI) to determine the profile of senior high school students’ physics multiple representation ability on heat material. PMRTI consists of three indicators: verbal representation, mathematical representation, and visual representation. In the case of this research, the profile of senior high school students’ physics multiple representation ability on heat material is generally still at a low level. The implication of this research can be used as empirical evidence that senior high school students’ physics multiple representation ability on heat material still needs to be improved.
Radiotracer method: A nuclear tool for flowrate measurement in the pipeline
Authors: Sugiharto S
Published: January 2021

Experimental work has been carried out to demonstrate using the radiotracer method for flowrate measurement of water in a 3 inches diameter of the carbon-steel pipeline. The water was supplied from a water tank of a volume of approximately 5000 liters. The tank was connected to the pipeline through a flexible plastic hose. A ball valve was installed at the far end of the pipeline to adjust water discharge from the pipeline. None flow meters were installed on the pipeline. Iodine-131 (131I) radioisotope with a concentration of 1 mCi.mL−1 has been injected instantaneously through the injection point located at 15 meters from the water tank. Two radiation detectors (notified as D1 and D2) which had been set-up respectively at the distance of 4 m and 7 m from the injection point recorded residence time distribution (RTD) curves of the radiation intensities emitted from the injected radioisotope. During the experiment, the system was assumed time-invariant by keeping the tank was always containing full of water. The transit time calculated based on mean residence time (MRT) was 89.9 s, and the linear velocity of the water flow is 3.33 cm.s−1
Guided inquiry assisted by metacognitive questions to improve metacognitive skills and students conceptual understanding of chemistry
Authors: Syahmani  , Saadi P , Clarita D , Sholahuddin A
Published: January 2021

Metacognition is an aspect to build students’ understanding of chemistry. A preliminary study conducted at SMAN 4 Banjarmasin showed that students’ metacognitive skills in the learning process is still low. The Guided Inquiry Assisted by Metacognitive Questions (GIAMQ) is an alternative to improve students’ metacognition skills in the learning process. A research on the application of guided inquiry assisted by metacognitive questions on buffer solution learning material has been conducted to: (1) the implementation of teacher activity, (2) increased students activity, (3) enhancement of metacognitive skills and students conceptual understanding; (4) students response to learning. This study implemented an action research model, consisted of several stages: planning, action, observation, and reflection. The subjects of the research were students in class XI MIA 4 SMA Negeri 4 Banjarmasin with a total of 35 students. Research instruments in the form of test instruments and questionnaires. Data were analyzed using quantitative analysis techniques and qualitative analysis. The results showed that (1) teachers ability to implement GIAMQ were improved, from good enough to good category, (2) students activity during GIAMQ were improved, from active enough category to active, (3) students metacognitive skills were improved from began to develop category in cycle I to already well-developed category in cycle II, (4) conceptual understanding increased from 74.69% to 79.80%, (5) students response during in learning were categorized as good. Researchers concluded that implementation of GIAMQ can improve metacognition skills, conceptual understanding, activity, and students.
Restructuring the pedagogical competence training involving lesson study
Authors: Sholahuddin A , Syahmani  , Susilowati E
Published: January 2021

Lecturers in higher education are recruited based on scientific field qualifications. Therefore, most of them did not have sufficient pedagogical competence academically. Pedagogical competence training in the form of instructional skills training (IST) and applied approach (AA) has not run optimally because it still emphasizes mastery of pedagogical basic knowledge and lacks in strengthening the lecturer’s learning management skills in the real classroom. By literature review method, this paper aims to analyze a practical experience of lecturer pedagogical competence training then propose the new structure both of material and pattern of IST and AA to overcome their problems. Analysis of the training experience and literature review concludes that university needs to restructure both material and pedagogic training patterns which include (a) merging of training material (b) focusing IST on providing basic pedagogical knowledge, while AA on developing supporting skills and learning practice (c) conducting IST in an online platform using a learning management system, while AA conducting through the field practice (d) conducting the learning practice in a real classroom using lesson study approach. It needs to involve the university institution leaders to facilitate the program by taking an appropriate policy to keep the sustainability of the program.
Profile of students’ critical thinking, creativity, and collaboration skills on environmental pollution material
Authors: Aufa M N , Hadi S , Syahmani  , Hasbie M , Fitri M , Saputra M A , Isnawati
Published: January 2021

This research was conducted to describe the profile of students’ critical thinking, creativity, and collaboration skills in science learning on environmental pollution material. This research uses a descriptive quantitative research method. The population in this study was all students of class VII, 300 students in total. The sample was taken by using purposive sampling technique with a total of 30 students. The instruments used in this study were a test (multiple choice questions and essays) and a non-test in the form of a questionnaire. The results showed that the critical thinking skill of students is in the low class in average, the creative thinking skill of students is in the low class, and the collaboration skill of students in the low class. The results of this study can be used as material for teacher evaluation, especially science teachers so that they can pay attention to the learning process and facilitate students with the use of appropriate models and strategies and the availability of teaching materials and media that can practice these three skills.
What’s App integrity in the life science concept during the covid-19 pandemic
Authors: Sasmita K , Palenewen E , Karnadi K , Solihin S , Badrudin
Published: January 2021

WhatsApp (WA) is the last alternative learning media in COVID-19 period. This study aimed to see the extent of WA’s integrity in supporting the learning process and outcomes. This quantitative research took data on 33 respondents and PAUD student guardians through questionnaires and multiple-choice questions by using random sampling technique. The resulting data in a simple regression test had significance coefficient of 0.05. The results of the data showed that 85% of student guardians were still less able to operate cell phones so they preferred WA. Furthermore, this study showed the integrity of WA in learning process at home which was capable and influential in improving student learning outcomes. The research implied that one’s capability in using the media was different to others’ and it was complicated for the teacher to equate the media or strategies in the classroom. Therefore, teacher must be more creative and innovative in using learning media.
Analysis of critical-creative thinking styles and their implications on self efficacy teacher pree service
Authors: Hamid A. , Saputro S. , Ashadi  , Masykuri M.
Published: January 2021

Critical-creative thinking styles and self-efficacy are important things in facing the 4.0 industrial revolution. This study conducted to analyze the critical-creative thinking style and its implications for prospective teachers’ self-efficacy. The method used is a survey method. The instrument for creative-critical thinking using Yanpiaw Creative-critical Styles (YCCS) test. The YCCS instrument has standardized with critical-creative thinking skills tests such as WGCTA (The Watson-Glaser Critical Thinking Appraisal) and TTCT (Torrance Test Creative Thinking). The results of the analysis show that (1) student-teacher prospective teachers do not have a supercritical or super creative thinking style, (2) prospective pre-service teacher are more dominant in having an intermediate thinking style, (3) pre-service teacher with a higher critical-creative thinking style have more significant implication for self-efficacy, compared intermediate thinking style.
Analysis of students’ Higher Order Thinking Skills (HOTS) ability in matrix subjects
Authors: Pasani C F , Suryaningsih Y
Published: January 2021

Higher Order Thinking Skills (HOTS) has become the focus of learning mathematics at all levels, especially for prospective math student-teachers because their abilities are not limited to themselves only. However, when they become teachers in the future, they have a tough task of making students to have HOTS. The study aimed to analyze HOTS of students studying mathematics in Matrix subject. The research method used was qualitative descriptive that analyzed and described students’ midterm exam answers based on indicators of HOTS to analyze (C4), evaluate (C5), and create (C6). The research subjects were Mathematics students of teacher training education at Lambung Mangkurat University that were taking Matrix subjects in 2018/2019 even semester involved in the Matrix lecture process. The result of the study was concluded that the thinking skills of students in the Matrix subjects in faculty of teacher training education, Lambung Mangkurat University, were in sufficient category. The results of the study should be a reference for the lecture process where students are familiarized with giving HOTS-oriented questions during exams and in lecture practice to help in developing them.
Development of podcasts as educational media based on local wisdom
Authors: Rahmia  , Zhahra  , Hasanah N. , Almubarak
Published: January 2021

One form of digital technology that has developed in the millennial generation is Podcast. Podcasting/Podcast is etymologically derived from the words iPod and Broadcasting, while the definition of Podcast is literally, a recorded audio file in MP3 format which is distributed over the internet. Podcasts can be a driving force for societal change, where there are themes that can change people’s mindsets to be more open and advanced. In accordance with the theory of technological determination, society is not only influenced by the content but also by the media. The method used in this study is a descriptive method with research instruments using structured interviews in the form of a questionnaire. Data are also obtained from literature reviews related to the object of the study through library research, namely literature review. The results showed a positive response from the respondents. Besides that, the development of Podcast media was also proven to be able to produce better knowledge due to repetition of information related to the material in question. Learning about culture/wisdom through Podcasts is considered feasible and effective, especially with the waning conditions of cultural values, a result of the era of globalization and the development of information technology.
Analysis of number sense capabilities of prospective mathematics teachers
Authors: Mawaddah S , Noorbaiti R , Ulfah A
Published: January 2021

A person’s sensitivity to numbers and their calculations is called number sense. This study aims to (1) analyze the number sense ability of prospective mathematics teacher students, (2) determine the mathematics learning achievement of prospective mathematics teacher students, and (3) analyze whether there is a relationship between number sense ability and mathematics learning achievement of prospective mathematics teacher students. The method used in this research is a descriptive quantitative method. The population in this study were students of the Mathematics Education Study Program FKIP University of Lambung Mangkurat Banjarmasin in the odd semester of 2019/2020. The sample in this study were students of the Mathematics Education Study Program Class of 2018. Data collection techniques were tests and questionnaires. The data obtained were analyzed with descriptive and inferential statistics. The results showed that (1) the students’ number sense ability of prospective mathematics teachers was in sufficient qualification. (2) the average learning achievement of prospective mathematics teacher students is 2.62 on a scale of 4, and (3) there is a relationship between number sense ability and mathematics learning achievement of prospective mathematics teacher students. Thus, improving the number sense of prospective mathematics teachers is an important goal for mathematics teacher education.
Mathematical communication skills of students in mathematics learning using discovery learning model
Authors: Zulkarnain I , Kusumawati E , Mawaddah S
Published: January 2021

This research aims to describe the communication skills of students in class XI MAN 1 Banjarmasin in mathematics learning using discovery learning model at 2018/2019 academic year. The method used in this research is quantitative descriptive. The object of study is to find students’ mathematical communication skills using discovery learning model. Data collection techniques used were test techniques. The instrument used was a written test in the form of description to measure students’ mathematical communication skills in mathematics learning using the discovery learning model. The results showed that students’ mathematical communication skills in learning mathematics using the discovery learning model in class XI MAN 1 Banjarmasin 2018/2019 academic year were in good qualifications. Therefore, the mathematics teacher can implement discovery learning to improve students’ mathematical communication skills in mathematics learning.
The development of Wayang Golek Video as physics learning media in the concept of light
Authors: Pairunan A S , Darsikin  , Saehana S
Published: January 2021

This study aims to develop wayang golek puppet show as a learning medium for physics subject, specifically on the concept of light. This research is a research and development that refers to the ADDIE model which includes 5 stages, namely Analysis, Design, Development, Implementation, and Evaluation. The video playback for the wayang golek puppet show produced were developed by involving Grade VIII students of Terpadu Madani Model Junior High School. The resulting wayang golek puppet video products were analyzed by media experts and content experts using questionnaires. It was found that the average score of the content expert’s assessment was 3.56 which belonged in the “Very Good” category, whereas the average score of the media expert was 3.73 which was categorised in the “Very Good” category. In addition, the resulting media was also analyzed by the teacher for its feasibility using questionnaires. The result obtained an average score of 3.00 and was categorized as “Good”. Furthermore, the final product of the video media playback was also tested on students, and an average score of 3.27 was obtained. This is categorized as “Strongly Agree”. The results of this study indicate that the wayang golek video media playback is feasible to be used as a medium for learning physics, especially regarding the light concepts for students.
Learning design: Integrated local tradition ma’dawa-dawa, ma’manu-manu, ma’pettuada based on android
Authors: Nurannisa A , Asfar A M I T , Asfar A M I A
Published: January 2021

Mathematical skills that are of major concern at this time are extrapolation abilities which require students to be able to solve mathematical problems with abstract and hierarchical concepts. To improve this capability, it can be done by integrating local technology-based traditions that have an educational philosophy. This study aims to review the integrated learning design of the local culture of Ma’dawa-dawa, Ma’manu-manu, Ma’pettuada based on android in improving extrapolation abilities. This research uses a descriptive qualitative research method with data in the form of analysis of some literature that supports research studies and is arranged descriptively containing a theoretical basis. The results of the study indicate that designed learning can be a means of developing extrapolation abilities through the integration of technology-based local cultures.
Waste composite of “JOS” coffee waste and gauze as alternative basic material for manufacturing craft products
Authors: Purwanto  , Prihatmo G , Diasmara G
Published: January 2021

The growth of coffee business in Indonesia has given rise to coffee shops in big cities, in Yogyakarta and its surroundings (2017) reaching 1,200. This number is higher than Semarang 700 and Solo only 400 shops. Yogyakarta as a student city is famous for its “jos” coffee, which is coffee infused with burning charcoal so that the sound of “jos” can rise. This city has many students, artists and younger generation who enjoy “jos” coffee. The “jos” coffee waste produced, one of which is in Pak Agus’ shop, is 4-6 kg/night. The aim of this research is to use “jos” coffee grounds waste as a basic material for making composites. The research method was carried out through experiments in the laboratory by making a composite waste of coffee grounds mixed with water, gauze fiber, coconut coir fiber, alginate, glycerol and gelatin. Composite composition consisted of “jos” coffee grounds from 10, 20 and 30 grams, 120 ml water, gauze, coconut fiber, 3 grams of alginate, 2 drops of glycerol, gelatin from 2,3,4, and 5 grams. The ingredients are cooked for 5 minutes, printed and then left for 24 hours. he resulting composites were tested for tensile, tear test, flexibility tested and observed for surface texture Composites with coconut coir fibers have poor surface texture and are easily fractured so that the mechanical properties of what is tested are composites reinforced with gauze fibers. The mechanical properties of the best composites were reinforced with gauze with a composition of 20 grams of coffee and 4 grams of gelatin, the tensile strength was 15.58 kg/mm2 and the tear resistance was 11.51 kg. From the observation that the composite has a smooth surface texture and can be bent up to 1800, so that it can be formed as an alternative material for making handicraft products.
Friction response of bioinspired AISI 52100 steel surfaces texturized by photochemical machining
Authors: Sánchez J C , Estupiñán H , Toro A
Published: January 2021

This work shows the friction response of textured steel surfaces whose deterministic design is inspired in the characteristics of the Vipera Ammodytes snake skin. The skin was studied to identify morphological, chemical, mechanical and tribological attributes that served as inspiration for the design of the deterministic patterns, which were reproduced in AISI 52100 steel samples by Photochemical Machining (PCM). The textured samples were tested in a pin-on-disc tribometer using AISI H13 steel as counter body. The results showed an effective reduction of up to 38% in the friction coefficient of the texturized samples when compared to the conventional ones, as well as an anisotropic friction behavior as a function of the sliding direction. In addition, it was observed that the percentage of texturized area of the samples strongly affected the friction response, especially for values higher than 20%.