bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of POGIL learning model by mind mapping and summary assignment of salt hydrolysis outcomes
Authors: Sumanik N B , Nurvitasari E , Maarebia R Z , Pasaribu Y P , Buyang Y , Rettob A L , Genisa J 
Published: May 2020

AbstractSalt hydrolysis is a difficult subject matter for some students, due to the characteristic aspects of chemical concepts and aspects of the learning model. Overcoming the difficulties of these students, one of them uses POGIL (Process Oriented Guided Inquiry Learning) learning. The POGIL learning model does not direct students in documenting material, so it is accompanied by mind mapping and summary. The purpose of this study was to determine the differences of students’ cognitive learning outcomes in the POGIL learning model by mind-mapping assignment between the students taught using the POGIL learning model with a summary assignment on salt hydrolysis material. This study used a quasi-experimental model with posttest only control group design. The results of this study showed that there were differences in cognitive learning outcomes which shown on the average value of students taught with POGIL learning models accompanied by assignments mind mapping higher compared to students who were taught with the POGIL learning model along with summary assignments.
Development of practical tools faraday effects on magnetic materials
Authors: Henukh A , Utomo M E , Nikat R F , Reski A , Simbolon M , Asmal S 
Published: May 2020

Abstract
This research aims to develop practical tools faraday effects that can be used as a medium for learning physics subjects in magnetic materials. The development method used is the Research and Development (R&D) method with the ADDIE model approach. The stages of this research are to Analyze, Design, Development, Implementation, and Evaluation. The tools and materials used are magnetic field sensors, 400 winding solenoids as induction sensors for test materials, Power Supply, 500x magnification USB microscope, CSV as data storage from sensors, Delphi 2007 as a hysteresis curve viewer. Product evaluation in the form of validation was carried out using an instrument in the form of a questionnaire filled by media experts with an average score of 93.94% so that it was in the excellent category and material experts with an average score of 86.05% so that it was in the very good category. The expected results of this study are. The results of the assessment of the effectiveness of the Faraday effect practicum tool, an N-gain of 0.67 was obtained that the average pretest was 48.0 and posttest 83.0. Based on the data above, this research shows that the development of the Faraday effect practicum tool is suitable for use as a learning medium.
Effectiveness testing of attitude (Enhalus acoroides) on lead (Pb) and copper (Cu) metals
Authors: Sardi  , Nafi N L , Ambo Rappe R 
Published: May 2020

Abstract
Increased human activity in all sectors due to rapid development, often resulting in pollutants such as heavy metals that have an impact on the environment and one alternative is phytotechnology. This study aims to (1) Determine the seagrass’s capacity to absorb lead (Pb) and copper (Cu), (2) Determine the optimization of seagrass, sediment, and seawater in absorbing Pb and Cu. This study was an experimental study carried out at the Hasanuddin University hatchery unit, Barrang Lompo Island, then analysis of Pb and Cu metal content in the Analytical Chemistry Laboratory of the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Hasanuddin University using the Atomic Absorption Spectrophotometer (AAS). The results showed that Enhalus acoroides seagrass had capacity dal am absorbed Pb of 0.08 mg/kg at a concentration of 120 ppm, while dal am absorbed Cu of 0.65 mg/kg at a concentration of 2 ppm, so that this seagrass is more effective at absorbing Cu than Pb, the Pb optimum results in seawater at a concentration of 120 ppm at 3.04 mg / L and sediment at an concentration of 80 ppm at 29.30 mg/kg, while the optimum yield of Cu content in seawater and sediments, obtained at concentrations of 1 ppm and 2 ppm, namely 0.56 mg/L in seawater and at a concentration of 4 ppm is 29, 67 mg / kg in sediment. While the optimal absorption of Pb by seagrass occurs at low concentrations of 40 ppm and 80 ppm of 0.07 mg/kg. The same result was obtained in sediments, 29.22 mg/kg at a concentration of 40 ppm. While the optimum Pb content in seawater is at a concentration of 40 ppm of 1.26 mg / L.
Livestock business development of border areas in North Sulawesi Province
Authors: Santa N M , Sompie F N , Waworundeng W 
Published: May 2020

AbstractThis study aims to analyze the development of livestock farming in North Sulawesi Province, especially the border areas. This research was conducted using a survey method in the border areas in North Sulawesi Province, namely the Sangihe Islands, Talaud, Siau Tagulandang and Biaro. The data are then analyzed descriptively about the number and types of livestock farms managed by the community, and market opportunities for livestock products. The results showed that livestock farming is very likely to be developed in the border area. All traditional markets in the area sell animal husbandry products in the form of meat and eggs from the city of Manado. The existence of livestock farming is still lacking, so the Regional Government needs to program animal husbandry development through development policies in the area.
The Effect of the door opening on various channel type of flow velocity (Case Study: secondary channel of the Saddang Irrigation Area, Pinrang Regency)
Authors: Syamsuddin G H , Maricar F , Lopa R T 
Published: May 2020

Abstract
Water that flows in channels in free conditions is water that flows in open channels and comes into contact with free air. All flows that enter the open channel system are designed to flow by gravity. The Open channels can be divided into two types, namely artificial and natural channels. Open channels encountered in technical, semi-technical, and non-prismatic irrigation. Research is carried out in line Secondary Regional Irrigation Alitta village Bentenge Subdistrict Paleteang district Pinrang the channel reviewed is a secondary channel which has a different type of channel, namely pair stone channel, concrete lining channel, precast concrete channel, and soil channel which is influenced by 3 door openings, namely 20 cm opening, 30 cm opening and 40 cm opening.
Components of steel slag in acid-contaminated porous concrete
Authors: Tonapa S R , Febriani L , Sandy D 
Published: May 2020

Abstract
The presence of slag as a result of waste from steel production annually increases. Researchers and environmentalists are very concerned to overcome this problem. Currently steel slag has been studied as a substitute for concrete compilers. The focus of this research is to utilize steel slag as a constituent of porous concrete in direct contact with acidic regions, in this case sulfuric acid and chloride. This test was carried out using 243 samples in testing the compressive strength, tensile strength and pore volume of concrete. Content of steel slag used is 0%, 50% and 80%. In the compressive strength test results for normal curing, sulfate curing and chloride curing showed an increase of 6.49%, 5.71%, 8.28% in the 50% slag content and 10.81%, 10.29%, 17.20% in the 80% slag content. Then in the tensile strength test showed an increase of 7% to 11% in the 50% slag content and 16% to 17% in the 80% slag content. As for the pore volume, the value is in range from 17% to 19%. These results indicate that slag can be used as a substitute for aggregate on porous concrete with compressive strength ranging from 10 MPa to 19 MPa.
Comparison of copper adsorption effectivity in acid mine drainage using natural zeolite and synthesized zeolite
Authors: Wulandari E , Hidayat A E , Moersidik S S 
Published: May 2020

Abstract
Acid mine drainage (AMD) contains a high concentration of various heavy metals and have low pH levels. In this study, the comparison between the use of natural zeolite and synthesized zeolite for Cu2+ removal in AMD was conducted. The adsorbent of natural zeolite was prepared through a chemical activating method by adding NaOH. While, synthesized zeolite was made from coal fly ash using a two-step method, fusion, and hydrothermal process. The AMD used in this study was artificially designed with the concentration of Cu2+ 100 ppm and pH ± 3. The adsorption experiment was carried out using a batch method to observe the influential parameters such as adsorbent dosage, contact time, adsorbent isotherms, and kinetics. The result show that the removal efficiency of Cu2+ for natural zeolite and synthesized zeolite was 98,16% and 93,98 % with optimum adsorbent dose 1,5 g/l and 21 g/l, respectively. The optimum contact time for both adsorbents was 120 minutes. The Langmuir isotherm model fitted the adsorption for synthesized zeolite and natural zeolite, with the maximum sorption capacity of 23,8 mg/g and 30,03 mg/g, and the kinetics model of pseudo-second-order and pseudo-first-order. The result of this study that the good adsorption effectivity synthesized zeolite. Furthermore, both natural zeolite and synthesized zeolite have great potential as a sustainable and economical material for heavy metal removal ion Cu2+ in wastewater.
Flexural behavior of double straight notch joint beam column exterior due to lateral cyclic load
Authors: Palembangan M T , Parung H , Amiruddin A. A. , Simbolon R 
Published: May 2020

Abstract
This study aims to determine and analyze the flexural behavior of the double straight notch joint beam column exterior due to lateral cyclic load. There are 3 (three) scale test specimens, BK monolith, SBK type 1 and SBK type 2. The joint model on the beam is a double straight notch and uses the method of mechanical connection and grouting. Loading with alternating lateral loads assumed as cyclic loads. Testing and analysis using the Displacement Control Method with the standards of the European Convention for Constructional Steelwork (ECCS) 1986. The results showed that the stability of SBK type 1 and type 2 specimens in terms of the characteristics of the hysteresis loop curve had a curve similar to BK monolith. The greatest displacement in compressive conditions occurs in SBK type 2 while drag conditions occur on monolithic BK. From the results of the study, it is also known that lateral loads are directly proportional to displacement, where the higher the lateral load is borne the greater the displacement experienced and vice versa. The displacement ductility that occurs is the partial ductility in type 1 SBK = 0.971 monolithic BK while SBK type 2 = 1.047 monolithic BK. Based on the results of studies of some of these behaviors, type 2 SBK has more advantages than type 1 SBK so that the results of SBK type 2 analysis can then be used as validation of monolithic BK.
Elasticity modulus concrete of abaca fiber
Authors: Tampi R , Parung H , Djamaluddin R , Amiruddin A 
Published: May 2020

Abstract
This research study discusses the modulus of elasticity of concrete using abaca fibers. The addition of abaca fiber to concrete mix is done with the composition of abaca fiber 0% (normal concrete), 0.15%, 0.20%, 0.25% with a fiber length of 50 mm. Concrete cylindrical specimens (100 mm x 200 mm) with each variation of 3 cylinders with a total of 12 specimens tested after the specimens reached 28 days in a Universal Testing Machine (UTM) and evaluated through the ASTM standard in testing concrete compressive strength. Concrete compressive strength test results with variations in length of 50 mm with a fiber volume of 0.15% produces an elastic modulus of 23057.14 MPa. For a volume of 0.20% the modulus of elasticity is 19575.44 MPa. Then for the fiber volume of 0.25% the modulus of elasticity is 17104.90. Normal concrete modulus value 20058 Mpa. From these results it can be concluded that the more fiber volume, the smaller the modulus of elasticity. The modulus of elasticity of abaca fiber concrete with a fiber length of 50 mm and a fiber volume of 0.15% is the best and gives an increase of 14.96% to normal concrete.
Shear strength of annealed wire fiber reinforced concrete coupling beam under cyclic loads
Authors: Kandou C , Parung H , Djamaluddin R , Amiruddin A 
Published: May 2020

Abstract
The design and construction of the coupling beams remain challenging due to the presence of large reversed-cyclic nonlinear rotation demands combined with large shear forces. One way to increase the shear strength of a coupling beam is to use fiber. The purpose of this research is to determine the shear strength for coupling beam using annealed wire fiber. Two coupling beam test specimens measuring 20 cm x 40 cm with a length of 115 cm with a ratio of Ln / h is 2.875 with the details of 1 coupling beam without fiber (CB-1) and 1 coupling beam with fiber (CBF-1). Annealed wire fiber used in research with diameter (D) 0.8 mm with fiber length (L) 48 mm (L / D ratio is 60) with fiber composition 0.75% of volume. The results show the Shear strength of coupling beam using fiber increases by 58% from normal concrete shear strength. Also, the shear strength of the coupling beam in SNI 2847:2013 is 0.67 and 0.42 of the experimental shear strength of normal CB and annealed wire fiber CB so that the design of the coupling beam based on SNI 2847:2013 can be used as a reference in planning earthquake resistant building structures.
Synthesis and characterization of stigmasterol imprinted polymers with precipitation polymerization method
Authors: Fauziah S , Sialla F S , Soekamto N H , Budi P , Taba P 
Published: May 2020

Abstract
Molecularly imprinted polymers (MIP) are porous materials that have an active binding site and can recognize specific target molecules. MIP synthesis was carried out by precipitation polymerization method using toluene as a porogen solvent and stigmasterol molecule as a template molecule. The synthesized NIP and MIP were characterized using FTIR and SEM-EDS. The ability of MIP adsorption on Stigmasterol was determined by concentration measurements using UV-Vis. The results of the characterization using FTIR showed that the functional groups that influence the formation of NIP and MIP are -OH, -CH, C=C, and -C=O. Characterization using SEM shows that the surface morphology of MIP is rougher than NIP. Characterization using EDS showed that there was a decrease in mass% by 2.54% and C% atom by 2.08% in MIP after extracting the Stigmasterol molecule. The ability of MIP adsorption on stigmasterol was 0.204 mg/g, while the ability of NIP adsorption on stigmasterol was 0.040 mg / g. The ability of MIP adsorption to stigmasterol molecules is better than NIP. Therefore, MIP can be used as an adsorbent to adsorb stigmasterol in sample extracts.
The digital media literacy level of the youth in Majene regency and its relationship with the hierarchy of regional development
Authors: Bakri R F , Mursalim  , Budimawan  
Published: May 2020

Abstract
Residents of Majene Regency especially young people today like to access information sites on the internet so digital media literacy skills were needed among young people. The research aims (1) to review and describe the digital media literacy level in the Majene Regency and (2) to review and describe the relationship of digital media literacy level and regional hierarchy development of Majene Regency. The research was classified as explanatory research with a quantitative approach. Determination of samples by probability sampling. Data were collected with a questionnaire and document study method. The data were then analyzed using the scoring method with Likert’s scale and scalogram analysis with Gutmann’s scale. The research results indicated that in general digital media literacy’s young level in the Majene Regency was classified as moderate, the capacity of their technical skills was categorized as high, their critical understanding capacity, as well as their communicative abilities, were categorized as moderate. The correlation between the development of the Majene Regency area the literacy level of the youth has a significant correlation. The regions which have a higher hierarchy in digital media literacy of the youth would be categorized as high, while the regions which had a lower hierarchy in digital media literacy would be categorized as low.
Extraction of Methylene Blue from Aqueous Solutions by Waste Cooking Oil and its Back-Extraction
Authors: Sipi A K M , Chang S H 
Published: May 2020

Abstract
This work aimed to use waste cooking oil as a greener replacement for the petroleum-based solvents in removing methylene blue (MB) from aqueous solutions by solvent extraction. The effects of different extraction parameters such as equilibrium pH, aqueous to organic phase ratio, and initial MB concentration on the extraction of MB from aqueous solutions by waste cooking oil were investigated. The back-extraction of MB from MB-loaded waste cooking oil was also explored. The maximum extraction (∼90%) and back-extraction (>90%) of MB were attained at equilibrium pH of 8, aqueous to organic phase ratio of 1:1, initial MB concentration of 20 mg/L, and with 1 M of sodium bicarbonate as the back-extraction agent.
Eulerian-Eulerian Approach to CFD Simulation of Two-Phase Bubble Column
Authors: Halim Nur Khairunnisa Abd , Hussain Siti Aslina , Razak Mus’ab Abd. , Mohd Yunos Mohd Amirul Syafiq 
Published: May 2020

Abstract
Calculation work is carried out in the present project to study the effect of different parameters on hydrodynamics of gas-liquid flow by using CFD. The steady state and transient, three dimensional simulations are performed of the whole bubble column for various inlet gas and sparger designs. A standard k-ε is used to describe turbulence occurring in the continuous fluid. Results show he asymmetric recirculation stronger with an increase in the number of holes giving better mixing. The gas hold-up increased with superficial gas velocity but independent of the sparger design at high velocity. Comparison of simulation results with the previous experimental work data has provided a successful validation of the model.
Research on Modular Coordination of Indemnificatory Finished Product Housing in Severe Cold Region of China ——A Case Study of an Experimental Residential Project in Harbin
Authors: Shao Yu , Mo Yizhou 
Published: May 2020

Abstract
This paper study the case of an experimental house built in Harbin and analyses the modular coordination of indemnificatory housing in severe cold area. Using case analysis and literature research methods, the modular coordination system of the experimental house is analysed, and this conclusion is elaborated from three aspects: component position, space optimization size and modular grid. The research shows three key problems in modular coordination of indemnificatory finished product housing in severe cold region: how to select the positioning mode of building components; how to select the optimal size according to the infill parts; and how to establish modular grid according to the spatial organization.
The Potential Use of Waste Cement as a Filler in Polymer Composites
Authors: Rattanapan A , Sritapunya T , Tuampoemsab S , Sapsrithong P 
Published: May 2020

Abstract
This study explores the potential to use waste cement particles from ready-mixed concrete industry as a low cost filler in polypropylene. Its effects on mechanical and morphological properties were investigated in comparison with commercial cement and calcium carbonate. Mixing and shaping procedures of the polymer composites specimen were conducted by two-roll mill and injection molding, respectively. Next, the effect of filler loading (0, 10, 20, 30, 40, and 50 phr) and filler type on the mechanical and morphological properties of the polymer composites were studied. The results show that when filler loadings increased, the young’s modulus, flexural modulus, impact strength, and hardness of the polymer composites also increased accordingly, while the tensile strength and flexural strength decreased. Moreover, the results show that the waste cement had a greater effect on the enhanced mechanical properties compared to commercial cement and calcium carbonate. Furthermore, the polymer composites’ morphology was studied using scanning electron microscopy. A microstructure analysis was performed to verify and provide a better assessment of the performance properties of the polymer composites.
Evaluation of Repair Quality for Concrete Structure by Non-Destructive Technique
Authors: Lin Yung-Chiang , Hsu Keng-Tsang , Cheng Chia-Chi , Lin Yi-ching 
Published: May 2020

Abstract
The objective of the proposed research project is to develop a non-destructive test technique based on stress wave for quantitative evaluation of the repairing status of concrete. Concrete structures frequently exist various types of cracks due to an inferior environment and excessive loading. There are several crack repairing techniques used in concrete construction. Epoxy-injection is popular maintenance method in crack repairing of the damaged concrete structure. In this paper, a technique based on the stress wave was used to evaluate the repair quality of concrete crack. Numerical simulation is also under research and results show that the stress wave propagation is capable of identifying the infill of epoxy-injection in the crack of repaired structures. The new technique under development has a high potential for evaluation of the quality of the repaired cracks.
Amino-Acid-Salt-based Carbon Dioxide Capture: Precipitation Behavior of Potassium Sarcosine Solution
Authors: Ma’mun S 
Published: May 2020

Abstract
This work studied the precipitation behavior of solids in the aqueous solution of potassium sarcosine (KSar) during the CO2 capture process with the concentration of 5m’ (mol/kg solution). The effect of precipitation on the CO2 capture capabilities was also studied. The results showed that 5m’ KSar gives a comparable result to MEA. The relatively high initial CO2 absorption efficiency combined with the positive effect of precipitation on CO2 absorption rate and CO2 capacity have made the 5m’ KSar be a promising solvent for the CO2 capturing process with precipitation.
Contribution of Nano Crumb Rubber on Recycled Asphalt Concrete As Pedestrian Paving Block
Authors: Annisa S L , Hadiwardoyo S P , Sumabrata R J , Iskandar D 
Published: May 2020

Abstract
Stripping the road surface layers of asphalt concrete caused by various considerations that have been damaged by the aging process of asphalt. This stripping material will continue to grow in sufficient quantities if the recycling process is not utilized. The recycling process can be done by restoring the performance of asphalt or aggregate and can even occur both to meet the specifications required originally. In this research, asphalt concrete mixture has been used where the asphalt element has undergone an aging process so that it needs to be rejuvenated or softened. The addition of used oil has been used in the process of softening the hot Asphalt Concrete Wearing Course (ACWC) type. The process of increasing the performance of recycled blends has used Nano Crumb Rubber (NCR) material. The test results show that the ratio of the old asphalt content and used oil as a softener is obtained with a ratio of 11: 4 to obtain the required level of softening. This composition has produced a bitumen penetration value of 60, and the addition of NCR 2.5% and 5% to the asphalt content. Testing for recycled asphalt mixes is carried out with Marshall Test, Indirect Tensile Strength (ITS), and water absorption testing for recycled mixtures for paving blocks. The test results show the addition of NCR by the dry method has increased the strength of the mixture at both ambient and higher temperatures of 35 °C and 45 °C.