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This bibliometric study aims to analyze the research output and trends in the field of Islamic research between 2020 and 2022. Using the Scopus database, a total of 6269 articles were identified for inclusion in this study, all of which contain the keywords "Islamic AND Islam" in the title, abstract, and keywords. The study employed bibliometric techniques to identify the most productive countries, authors, affiliations, and journals in the field of Islamic research. The analysis revealed that Indonesia is the most productive country in Islamic research, followed by Malaysia and USA. The International Islamic University Malaysia was identified as the most productive affiliation, while Ejaz Aslam and Razali Haron's study on the impact of corporate governance on Islamic bank performance was the most influential publication with 33 citations on Scopus. The Journal of Islamic Marketing was found to be the most productive journal in the field. The co-occurrence network analysis using Keyword Plus identified "human," "education," and "economy" as the most frequent and interconnected topics in Islamic research. The network also revealed a node connected to "Islamism," indicating a growing interest in the intersection of religion and politics in Muslim-majority countries. Overall, this study provides valuable insights into the current state of Islamic research and its trends. The findings can guide policymakers and researchers in developing strategies and policies to advance the field and address current challenges. The bibliometric analysis can also aid researchers in identifying potential collaborators and interdisciplinary connections, leading to the development of new research directions and opportunities. [ABSTRACT FROM AUTHOR]

This research focuses on improving public health through drinking water. In previous research conducted in 2021, drinking water was produced from the Rainwater Harvesting technology used "Centrifugal Filter". This study, to continue previous research, was carried out by converting rainwater into healthy drinking water using Electrolysis system technology. Rainwater is harvested using Rainwater Harvesting technology that has been developed in previous studies. Rainwater is treated with this developing technology to convert it into acid-base water. Alkaline water based on research by experts is proven to be able to balance excess body acid levels due to activity and exposure to viruses. This research also modifies the previously existing electrolysis technology with "container's bulkhead" technology. The modification intends to speed up the alkaline water process which, based on experience, takes a long time. Based on the results of the study, changes in TDS and pH levels were very large. In the first stage process, the TDS value was from 22 to 16 while the pH level did not change on a scale of 7.4. Meanwhile, the problem of the still high level of TDS has been investigated due to the presence of factories around the research location that pollute the air atmosphere so that rainwater in the environment is polluted. For this reason, modification of the filtering system was carried out to reduce TDS levels. Based on the results of the modification by adding a filter at the output of the centrifugal filter and input to the reservoir, this can reduce the TDS level to a value of 16. The water output from process 1 is then forwarded to the reverse osmosis filtering system so that the drinking water parameters are met. The TDS level of the reverse osmosis system output water decreased slightly from the output water 1 to 12 while the pH level increased to 8.2. To turn water into alkaline using a container bulkhead system managed to increase the pH level to 10.5 in a conversion time of 6 hours. [ABSTRACT FROM AUTHOR]

The most common failure in plastic spur gear is the less strength in the operation condition. This study aims to optimize the plastic spur gear in a single stage to improve the strength of spur gear. In this study, finite element analysis (FEA) is performed on gears under cyclic loading. The greatest stresses are sustained in each step of cyclic loading, and crucial spots are determined. The modeling of the gears is done in Solidworks software, while the FEA (Ansys Static Structural) is used for the analysis. Ansys Static Structural is used in this research to model the stresses and load impact on the gear. Shape optimization is done in this study to find the best couple from increasing fillet root radius and face width. The simulation results show that based on the optimization of plastic spur gear, an increase in the strength by 12,673% with increasing fillet radius of the root and an increase in the strength by 32.43% with the optimized shape design (by increasing fillet radius and face width) are obtained. [ABSTRACT FROM AUTHOR]

The slip boundary has a significant impact on the effectiveness of hydrodynamic journal bearing. The slip boundary can be induced by the hydrophobic coating. The favorable influence of slip on thermal behavior, on the other hand, has received less attention. Parameters related to thermo hydrodynamic properties of heterogeneous type of bearing that operates in incompressible, stable, and turbulent states are investigated in this specific scope of research usin g CFD methods. The thermal hydrodynamic behavior of heterogeneous slip/no slip bearings is investigated in terms of volume fraction (VF), temperature, lubricating pressure, and load-carrying capacities when operating at various shaft rotational speeds. The journal bearing's actual operational condition is depicted using the multiphase cavitation model. It is discovered that shaft speed has a significant impact on the boundary condition of a het erogeneous journal bearing in terms of tribological performance. Besides, the maximum hydrodynamic lubricating pressure produced proportionally climbs as the shaft speed on the journal bearing increases. The findings show that as the shaft speed increases, so does the temperature of the lubricant. Moreover, it is found that the effect of slip is desirable in all simulated condition s sin ce it enhances the bearing load support, just as shaft speed does. [ABSTRACT FROM AUTHOR]

Debris flow studies were carried out in areas that frequently experience floods and debris flow in Semaka. This research aimed to conduct geomorphological and geotechnical conditions, hydrological analysis, debris flow simulation, and countermeasures against debris flow. Based on frequency analysis obtained R24 for a 100-year return period of 131.59 mm, then with the Nakayasu method was 24.33 m3/s. This study examines debris flow runout modelling using HEC-RAS 6.1. The simulation results in the existing conditions show that the flash flood or debris flow leads to residential areas with a flood depth of 0.2-1.5 m, while on roads the flood depth reaches 1.0 m This scenario gives very satisfying results after being validated with the real events. The simulation results in conditions with the addition of an embankment structure on the left side, indicating that the channel can pass the flood without overflowing into the residents' houses. Thus, debris flow or flash flood disaster mitigation work by adding an embankment structure on the left side of the channel and river normalization can be applied. [ABSTRACT FROM AUTHOR]

Packaging waste has become a major environmental issue as the world's population grows, increasing the demand for multi-layer packaging (MLP). As a result, there is a push to develop alternative methods for recycling such materials. Composite material production has become a significant concern for mechanical recycling of plastic waste. Fly ash (FA) could be used as a filler in polymer composites to improve their properties while lowering manufacturing costs. This study describes the creation of a novel value-added composite made of FA and flexible MLP. FA is added to MLP in varying amounts up to 40% by weight. The composite was created using a single screw extrusion technique at maximum temperatures of 260°C and screw rotation speeds of 100 rpm. An injection molding machine was used to make test specimens for mechanical property evaluations. Mechanical properties such as flexural and impact were measured using ASTM D790 and ISO 179. The density of the composite material was determined using the ASTM D792 standard. The result shows that adding FA will improve mechanical properties such as flexural and impact strength in specific compositions. [ABSTRACT FROM AUTHOR]

Flexible multilayer packaging (MLP) is a type of packaging that consists of several layers of different polymers and aluminum. MLP recycling is difficult due to the incompatibility of some of its components, resulting in poor recycling product performance and a low market value. Using a compatibilizer in MLP recycling may solve the problem, and thus recycled MLP may find suitable applications. This research blended shredded MLP and HDPE bottle caps with PE-g-GMA as a compatibilizer using a single screw extruder. The barrel temperatures were set at 180 to 260°C for different zones, and the rotation speed was at 100 rpm. The weight ratio of HDPE caps to MLP varied from 0.16 to 1.14, and the weight % of PE-g-GMA varied from 0.3 to 11%. Central composite design (CCD) generates 11 runs with different material formulations. The flexural test specimen was manufactured using injection molding and tested according to ASTM D790. FTIR and DSC were measured to support the investigation. The optimum flexural strength of 16.3 MPa with a 0.65 weight ratio of HDPE caps to MLP and 0.4 wt.% PE-g-GMA was obtained through response surface statistical analysis using Rstudio software. According to optimum flexural strength results, a panel pallet with SNI 8944:2021 dimensions have a 724 kg load. [ABSTRACT FROM AUTHOR]

Shrimp farming in Prigi Bay adjacent the seawater produces ammonia organic waste which has the potential to cause marine pollution. To identify and map the ammonia content of shrimp ponds around the sea, we investigated the ammonia content in sludge sediment. Identification of ammonia in sediments were used and applied the Phenate and Nessler methods, respectively and then mapped using Arcgis software. Ammonia contents by Phenate identification was chosen as a method with good linearity (r = 0.999), which is higher than the Nessler method (r = 0.994). The results of accuracy and precision in this method reached ∼100% of recovery and 1.23% of RSD. This method is very suitable for mapping ammonia as a marine pollution. The results of the shrimp pond ammonia levels showed from 2.899 to 23.270 mg/L. The results of the analysis of shrimp pond waste sediment exceeds the quality standard of ammonia which has the potential to pollute the sea. Mapping of the potential for ammonia pollution is clearly divided into several polluted zones, indicating alarm pollution in the seawater. [ABSTRACT FROM AUTHOR]

Mangrove plant around Prigi beach has the potential to be used as biochar adsorbent to remove nickel content. The high Ni concentrations can cause water pollution problems, which is needed as adsorbent at this time. This study aims to characterize mangrove biochar using XRF, SEM, and FT-IR and determine the optimization of the size and contact time of mangrove biochar on the nickel ion in the adsorption process. The leaves, seeds and mangrove stems were collected and produced biochar using the pyrolysis method, and then characterized with XRF, FT-IR and SEM. The results of this XRF analysis of mangrove plants contained a content of 0.01% NiO. The FT-IR results show the presence of the main functional group O-H at a wave number of 3319.49 cm−1, and SEM magnification of 2500x found that biochar has a rough morphology and the presence of micropores with an average particle diameter of 2018 nm. The adsorption test showed that the adsorbent in bulk size was able to adsorb the highest nickel metal ion of 99.4% with a contact time of 48 hours. [ABSTRACT FROM AUTHOR]

The high ammonium content in the aquatic environment originating from the disposal of shrimp ponds has a negative impact. This has the potential to cause disturbance and pollution in aquatic ecosystems. The Fe3O4/C/SiO2 nanocomposite can be used as an adsorbent to reduce the concentration of NH4+ in shrimp pond wastewater. Nanomagnetic synthesized by coprecipitation method. Nanomagnetic Fe3O4 is less stable in nature so oxidation can occur. Therefore, carbon as a precursor is used to coat Fe3O4 nanomagnets. Carbon activation was carried out by the activation method using NaOH. The addition of SiO2 to Fe3O4/C using PEG4000 forms Fe3O4/C/SiO2 nanocomposites with the aim of increasing the adsorption effectiveness of Fe3O4/C/SiO2 nanocomposite materials. Characterization of Fe3O4, carbon, and Fe3O4/C/SiO2 nanoparticles using XRD and FT-IR instruments. Analysis of ammonium ion content after adsorption using the phenate method. The use of SiO2 as an ammonia adsorbent can be carried out with an adsorption percentage of 11.697%. [ABSTRACT FROM AUTHOR]

Ammonia contained in shrimp pond wastewater will harm the surrounding environment if the waste is disposed of freely without prior treatment. The adsorbent is used to reduce the concentration of ammonia in shrimp pond waste. This study used CaCO3 to coat Fe3O4/SiO2 nanocomposites. CaCO3 is used as a coating for nanocomposites because it has been investigated to be able to be used as an adsorbent to reduce ammonia from a liquid sample. Synthesis of Fe3O4/SiO2/CaCO3 nanocomposite using coprecipitation method. Characterization of Fe3O4 nanoparticles, and Fe3O4/SiO2/CaCO3 nanocomposites using FT-IR and XRD. The synthesis was successful but the adsorbent did not absorb ammonia. CaCO3 and SiO2 solids can absorb ammonia, while Fe3O4 nanoparticles desorb ammonia. Solid SiO2 has a higher % adsorption than CaCO3 in standar solution but in sampel of shrimp pond wastewater 0.1 grams of CaCO3 was able to reduce ammonia levels in shrimp pond wastewater by 0.9907 mg/L with % adsorption was 10.02% and better than adsorption of solid SiO2. [ABSTRACT FROM AUTHOR]

In this work, we develop the rapid diagnostic kit potentially applied as point-of-care testing for kidney disease (nephropathy) through detecting albumin in urine samples. For this purpose, gold-nanoparticle (AuNPs) in combination with anionic dyes of Bromocresol Purple (BCP) and Bromothymol Blue (BTB), which are immobilized onto distance-based microfluidic paper-based analytical devices (d-μPADs), are utilized as sensing reagents. In this device, two mechanisms operate for quantitative and semiquantitative detection of albumin using d-μPAD, which include (1) protein error of pH indicator by direct reaction of albumin with dyes and (2) full corona protein formation of AuNPs with albumin. These synergistic reaction mechanisms facilitate the sharp color change of dyes, easily detected by the naked eye. Some parameters affecting the sensitivity of the proposed method, such as dye concentration, pH, reagent volume ratio, reagent immobilization, and reaction time, are investigated in detail. Inexpensive, disposable, and easy to use without technical expertise for albumin detection are advantages of the proposed method. Additionally, the proposed method has a high precision (RSD: 1.08%) and accuracy (99.38-99.96%) [ABSTRACT FROM AUTHOR]

A very low head turbine is a turbine that works on a head below 2 meters. Very low-head turbines can be installed in many places, such as irrigation canals and flat streams. One of very low-head turbine type is the Gravitational Water Vortex Power Plant or Turbine Vortex. Vortex turbines utilize whirlpools formed by water entering from a tangential direction into the circulation tank (basin). In the whirlpool area, a turbine with a vertical shaft is placed which can extract energy from the vortex. The water then exits through the hole under the circulation tank. To determine the characteristics of a vortex turbine with high efficiency, research was conducted on various shapes and positions of the Vortex turbine blades. This research method uses an experimental approach in the laboratory with three blade shape variations (straight blades, top curved blades and side curved blades). Each blade shape was tested in three variations of positions (turbine blades above the outlet, half of the turbine blades above the outlet and the turbine blades fully submerged in the outlet). The water discharge used is 3 l/s. From the experimental results, it is known that the highest efficiency is 29.47% by using a side curved blade at the turbine blades position above the outlet. [ABSTRACT FROM AUTHOR]

As an alternative to using very low head micro hydro power plant technology, vortex turbine technology can operate at a reasonably low head, which is about 1 m, with a flow rate that is also not too large, which is less than 1 m3/s to about 5 m3/s. This condition is one of the advantages of the vortex turbine, which can generate electrical energy that is useful for rural areas with the potential for small river water or irrigation canals with not too high head and not too large water discharge. However, the efficiency of vortex turbines tends to be lower than other types of turbines. Therefore, it is necessary to review the performance improvement of the vortex turbine. This paper reviews an improvement of vortex turbine performance through turbine blades, circulation tanks/basins, and computational fluid dynamics analysis. The discussion of the turbine blades includes setting the number of turbine blades, the shape and installation of the turbine blades, the use of blade materials, the addition of baffles on the blades, and the use of multistage blades. Furthermore, the discussion is carried out on the shape of the circulation tank/basin and outlet hole, and the flow analysis through computational fluid dynamics (CFD) analysis. [ABSTRACT FROM AUTHOR]

Therapeutic technology is increasingly varied, especially in healing patients. Therapeutic devices play an important role in supporting medical device facilities intended for patient needs, especially in therapeutic devices used to treat cases of joint problems and stretching of human muscles. Traction device is one of the tools used to treat joint disorders, muscle relaxation, and joint mobilization. Traction is a medical device that is used to provide healing in the form of therapy that functions to relax muscles by pulling a part of the body in a certain way, if possible by using assistive media in the form of weights to provide balance between objects and therapeutic tools. This simulation of the Waist Traction Therapy Device with the Arduino Control System uses a DC motor working system that can be used to pull and hang therapeutic objects. Utilization of the ATMEGA 328 microprocessor using the Arduino IDE is also utilized in this tool as a control system in setting the therapy process time, selecting load options simulated by motor pulling strength and setting options displayed on the 20x4 LCD, the function of using the ATMEGA 328 microprocessor is also to activate the load towing motor on the waist which is considered more effective and efficient in terms of economy and usage. [ABSTRACT FROM AUTHOR]

The river is the first location for the growth and development of urban settlements in Indonesia. Kampung Pahandut is an early village located in the Kahayan River area which has now developed into Palangka Raya City. One of expansion of Kampung Pahandut is Kampung Pahandut Seberang. Kampung Pahandut Seberang was a place for farming and a forest area, but it developed into a settlement for immigrants in Palangka Raya City. The settlements in Kampung Pahandut Seberang are divided into two, namely the house on the ground, the house on the water divided into two houses on stilts and a lanting house. A house on land is a house located on the ground, while a house on water is a house on stilts as an initial house that functions as a residence and a floating house, which is a development house after the house on stilts is located on the water. Floating house serves as a place for bathing, boat parking, fish cages, and a place to trade. This study aims to analyze the typomorphology of settlements in Kampung Pahandut Seberang in the Kahayan River area. The method used is a qualitative method based on data in the field with guidance from community leaders as key experts. The analysis is used to identify physical and non-physical types as factors pattern the settlement environment in the riverside area. The research output is to identify the types of settlements and the pattern of settlement development, and the elements pattern the settlement environment in the Kahayan riverside area and the adaptation of the people who live in the Kahayan Riverside area. [ABSTRACT FROM AUTHOR]

The Strong and safe Building is designed to avoid structural failure from an earthquake or the other causes. Internet of Things (IoT) based real-time wireless sensors were used in BF 350 AA Arduino module to measure the strain of reinforcement and concrete of structural member in the building. The collapse of the structure can be detected and the weakening of the building structure through reinforcement and concrete can be reported using wifi-based strain sensors under static and impact load in non-destructive measurement, used for long periods and can real-time monitorize. [ABSTRACT FROM AUTHOR]

Product Design Engineering (PDE) is a third-year module for manufacturing focus engineering to further enhance problem-solving skills, teamwork, general engineering knowledge and its application, and the knowledge and approach to product design. Project Based Learning has been incorporated throughout the timeline of the Engineering course, and the PDE module aimed to further elaborate and improve the skills acquired in prior years. This article explores the effectiveness of integrating PBE in realizing the aims and objectives of the Product Design Engineering module. [ABSTRACT FROM AUTHOR]

Chemistry, especially in the chapter on reaction rates, studies the composition of matter, changes in matter, basic laws, and abstract concepts. The reaction rate chapter is considered difficult bystudents, so the source and learning media are needed to make it easier for students to learn it. One of the sources of learning media is teaching material. Teaching material has an important role because it is a tool to achieve learning objectives. Therefore, new reaction rate teaching material needs to be created to accommodate abstract concepts. These concepts can be described by chemical representationandthen explained through representational competence. Based on the description above, this study aimed to 1) develop valid and appropriate teaching materials for reaction rate-based chemical concepts, chemicalrepresentation, and representational competencies and 2) analyze the validity and legibility tests of the developed teaching materials. The research and development design used was the defining stage, designing stage, developing stage, and disseminating stage, which refers to the 4-D model by Thiagarajan et al. (1974). However, the dissemination stage was not carried out due to time and cost considerations. The research instruments used were a validation questionnaire sheet and a legibility questionnaire sheet. The product was validated by two validators from the lecturers of the Department of Chemistry, Universitas NegeriMalang, and then tested for legibility by 32 students of class XI-MIPA at SMA Negeri 3 Kediri. Quantitative data were analyzed using descriptive statistical techniques with the percentage formula. The data analysis was then interpreted according to the range of criteria according to the Likert scale. Meanwhile, qualitative data were analyzed using descriptive analysis techniques. The teaching material validation results obtained an overall average value of 93.5% with a very valid category. Meanwhile, the results of the legibility test of teaching material obtained an overall average value of 87.5% with a very decent category. Based on the research results, it was known that the teaching material developed was categorized as very feasible with few revisions to be used. Therefore, this teaching material can be further developed for dissemination. [ABSTRACT FROM AUTHOR]

The 2013 Curriculum applied in the school still faces difficulties in improving students' critical thinking skills. Teachers did not pay attention to students' initial ability in drawing up the lesson plan because they drew it up just to fulfil the administrative obligations. It does not accommodate all students with different initial abilities to improve their critical thinking skills by giving them equal opportunities. Differentiated science inquiry is a gradual learning model of inquiry lessons that carry out four levels of inquiry, namely demonstrated, structured, guided, and self-directed inquiry into the learning process and adapted to the needs of students. Learning materials based on the differentiated science inquiry model have been developed, so this study aims to determine whether there is an effect of chemistry learning based on the differentiated science inquiry model to improve students' critical thinking. According to descriptive analysis, the N-Gain of the control class is 0.613 with the medium category, while the experiment class got 0,783 with the high category. The N-Gain analysis of students' critical thinking in each stage is in the high category where students of demonstrated, structured, guided, and self-directed inquiry got N-Gain as much as 0.737, 0.754, 0.801, 0.844. Students are very critical category for elementary clarification indicators, critical category for basic support, strategy and tactics, and advanced clarification indicators, and quite critical category for inference indicators. According to the inferential analysis, the data was not normal and homogeny distributed. The hypothesis was tested by Mann Whitney and showed that the significance is 0.00 < 0.05, which means that chemistry learning based on the DSI model has an effect on improving students' critical thinking. [ABSTRACT FROM AUTHOR]

This research was conducted to synthesise Magnetic Solid Phase Extraction (MSPE) adsorbent to adsorb Pb(II) ions. The MSPE adsorbent consists of a magnetic part as a core and a coating as an analyte-binder. This research aimed to synthesise carboxymethyl kappa-carrageenan (CMKC) coated nano-magnetite, which was crosslinked with bisphenol A diglycidyl ether (BADGE), as Pb(II) ion adsorbent. This research was conducted in several stages, which were a synthesis of nano-magnetite and its physicochemical characterisation using SEM, FTIR, and XRD instruments; CMKC synthesis and characterisation by FTIR; synthesis of Pb(II) ion-imprinted BADGE-coated CMKC-coated nano-magnetites and its characterisation using FTIR, SEM, and XRF instruments, and tested its adsorption ability to Pb(II) ions. The synthesised magnetite has a size of 28 nm; the formation of magnetite was confirmed by the absorption peak in the FTIR spectrum resulting from the synthesis of magnetite, typical Fe-O peaks at 581.35 cm-1 and 443.5 cm-1. The synthesised magnetite diffractogram was identical to the Fe3O4 diffractogram. CMKC was successfully synthesised, confirmed by the appearance of the absorption peak of the C=O group at wave numbers 1604 cm−1 and 1443 cm−1, which showed asymmetric and symmetrical vibrations of the –COO-group in the FTIR spectrum, indicating a carboxyl group. The adsorbent in the form of CMKC-coated nano-magnetite cross-linked with BADGE, printed with Pb(II) ions, was successfully synthesised; the surface of the adsorbent is rough, porous and pleated, FTIR spectrum of the adsorbent, showed that crosslinking and mould formation caused the C=O asymmetric vibration peak to shift to 1650 cm-1. The adsorbent has the adsorption ability (Kads) to Pb(II) ions of 0.156 mg Pb(II)/g adsorbent. [ABSTRACT FROM AUTHOR]

Physical disabilities cause significant distress in people's daily routine, especially for leg amputees as their movement is restricted. The civilized society has the responsibility to provide them with better prosthetics so they can live a normal life. Previously, prosthetic legs were developed for lower leg amputees. Today's electronic prosthesis provides a wide range of mobility compared to a mechanical prosthesis. Powered prosthetics are quite expensive and hence not widely used. We have proposed a low-cost control system above-knee powered prosthetics leg that is reliable, and the complexity of the model is less. The prostheses works by taking input from a sensor placed in the model and six FSR402 sensor and an IMU sensor that record force muscle activity of the thigh during variation of leg movement. The value of motion of the joint knee angle is determined by sensors. In this paper, we are discussing and comparing potential deep learning control system namely artificial neural network (ANN) as baseline and recurrent neural network-long short term memory (RNN-LSTM) to predict human gait cycle. A multi-layer perceptron (MLP) method is implemented. In general, network architecture consists of input layer which is represents by six inputs of the FSR402 sensor and an IMU sensor, fully connected layers, and an output layer as joint knee angle. As the result model of ANN as baseline has metric value MAE and R squared are 6.21 and 68.7% respectively whereas model of RNN-LSTM has metric value MAE and R squared are 4.99 and 96.9% respectively. The result indicates the RNN-LSTM model is most likely to perform fewer errors based on the dataset. RNN-LSTM outperforms the task with a greater value compared to the ANN model as the baseline. This present study suggests that deep learning with the recurrent neural network-long short term memory (RNN-LSTM) is suitable for the prediction of human gait cycle movement from the FSR402 and an IMU signal in the overall walking task. [ABSTRACT FROM AUTHOR]

One of the main objectives of micro-teaching simulation is to develop prospective teachers' basic teaching skills. In particular, one of the important aspects of those basic teaching skills is to design and demonstrate mathematical reasoning activities in mathematics classes. In the case of micro-teaching simulation for prospective teachers, mathematical reasoning activities can be seen in the lesson plan and in the teaching simulation. This study is aimed to study the prospective teachers' skills in designing and performing mathematical reasoning activities. For this purpose, 25 videos of micro-teaching simulation were analyzed by using a qualitative descriptive approach. The analysis focused on identifying three types of questioning – i.e. probing, guiding, and factual – in the tasks and activities designed by the prospective teachers. The analysis revealed that factual guiding is the most frequently observed questioning posed by the prospective teachers. [ABSTRACT FROM AUTHOR]

This article presents a literature review on the potential of augmented reality to facilitate socio-scientific issues-based learning in biology class. This study was conducted using the Systematic Literature Review method through five main stages: formulating the research problem; searching the literature; selecting the literature; analyzing and synthesizing; and reporting the findings. Articles that meet the criteria were selected to be analyzed further. Based on selected articles, we analyzed on what kind of augmented reality technology that can be used and how can augmented reality support socio-scientific issues-based learning in biology class. The findings reveal that augmented reality can be an alternative media for biology teachers to facilitate socio-scientific issues-based learning in the form of mobile application. The integration of augmented reality in biology learning based on socio-scientific issues is able to facilitate context visualization, increase students' participation, develop conceptual knowledge, affective, socio-scientific reasoning, and many other skills. [ABSTRACT FROM AUTHOR]

The aim of this study was to analyze the effect of stem and branch/twig mixture of sengon wood (Falcataria moluccana (Miq.) Barneby & J.W. Grimes) on physical and mechanical properties of cement-bonded particleboard. Twelve years old and 20 m high of sengon tree was felt from nearby Samarinda. Cement-bonded particleboard was made by conventional method by using various ratios of stem and branch/twig mixture i.e.: 100:0, 75:25, 50:50, 25:75 and 0:100 (w/w). Target density and thickness of panels were 1.2 g/cm3 and 12 mm. Ratio of cement to particle was 75:25 (w/w). The particles were pretreated by boiling (100°C) for 30 minutes. Panels were processed by 30 bars of pressure. The physical and mechanical properties of cement-bonded particleboard were evaluated with reference to ISO 8335:1987. The results showed that the hydration temperature of stem, branch and twig were 52°C for 14 hours, 55°C for 11 hours and 51°C for 13 hours, respectively. The physical properties of the panels were as follow: thickness 12.37-12.45 mm, density 1.16-1.18 g/cm3, moisture content 8.91-9.36%, thickness swelling 2.04-1.83%. The mechanical properties of the panels were as follow: MOE 4316-4855 N/mm2 and MOR 12.48-14.21 N/mm2. All of physical and mechanical properties of the panels were not significantly affected by the mixture treatment. The physical and mechanical properties of the panels fulfill the requirement of ISO 8335:1987. The present study suggested that stem, branch and twig sengon wood have potential as raw material of cement-bonded particleboard. [ABSTRACT FROM AUTHOR]

This study aims to determine differences in mathematics achievement based on status and region in junior high schools in the Province of the Special Region of Yogyakarta, Indonesia. This study uses a quantitative approach. The study involved 558 junior high schools. This study uses secondary data based on the Regional Education Assessment for Mathematics results in 2021. The analysis technique uses a two-way Analysis of Variance (ANOVA). The analysis shows that public school mathematics achievement is better than private schools, and Mathematics achievement in urban schools is better than in schools located in the suburbs. [ABSTRACT FROM AUTHOR]

Selection of new employees is one of the ways used to obtain qualified employees. The goal is to get the right person for a particular position. Especially if some of the existing prospective employees have abilities and some other considerations that are not much different. Therefore, a system is needed that can support decision making in the selection process of new employees. This research aims to design and create decision support system to new employee. The method performed in this study is Simple Additive Weighting (SAW). With this decision support system to new employee can be used as an alternative to help and facilitate the decision-making process. The final result of the assessment process is judged to be fairer, as there is no subjective element in determining the employees received. [ABSTRACT FROM AUTHOR]

Invasive plants are the second biggest threat to biodiversity after habitat destruction. Effective control of invasive plants in term of strategy to obtain economic value from invasive plant uses is urgent. The present work aims to evaluate biological activities and phytochemicals of four invasive plant species, Mikania micrantha, Borreria alata, Lygodium flexuosum and Solanum torvum. Plant powder was macerated with methanol to yield methanolic extract. Antioxidant activity of the extract was evaluated in DPPH radical scavenging activity. Antimicrobial activity was determined using agar-well diffusion assay against Cutibacterium acnes, Streptococcus sobrinus, and Streptococcus mutans. The presence of phytochemicals was analyzed using qualitative and quantitative methods. The highest antioxidant activity was displayed by the Lygodium flexuosum leaves extract, while Mikania micrantha appeared to be the lowest. The antioxidant IC50 of the plant extract tested were 41.72-140 µg/ml. In antimicrobial assay, Borreria alata leaves extracts showed to be the most active. The total phenolic content of the leaves extracts was 117 – 421 µg GAE/mg extract, while the total flavonoid content was in the range of 64 – 240 µg CE/mg extract. Our present study displayed potential uses of selected invasive plants as antioxidant and antimicrobial agents. [ABSTRACT FROM AUTHOR]

The purpose of this study was to analyze the effect of alkaline treatment of red meranti sawdust and the composition of a mixture of high-density polyethylene (HDPE) and polypropylene (PP) plastics on the physical and mechanical properties of wood-plastic composites (WPC) products. Alkaline treatment was done by soaking sawdust in a 3% NaOH solution for 2 hours. The HDPE-PP blend as a polymer matrix has been adjusted at 100:0, 75:25, 50:50, 25:75, and 0:100 (w/w). The ratio of sawdust and plastic was 40:60 (w/w). Maleic Anhydride with a concentration of 3% was used as a coupling agent. The panels were processed by pressing (30 bar) at a temperature of 180 °C for 20 minutes to give a panel density of 0.7 g/cm3. The determination of the physical and mechanical properties of WPC was carried out according to ASTM standards. A factorial design with five replications was used for each parameter. The results showed the ranges of panel density (0.63–0.73 g/cm3), moisture content (2.82–3.58%), water absorption (13.58%-30.50%), thickness swelling (1.30–4.51%), MoE (2,229.67–3,332.91 N/mm2), MoR (4.93–10.94 N/mm2), IBS (0.39–0.54 N/mm2), and impact resistance (46.63–65.72 Joule/m). The statistical analysis showed that the wood alkaline treatment caused a significant effect on all the physical properties of the WPC, as well as IBS. The different HDPE-PP ratio strongly contributed to a significant impact on the density, water absorption, and MoR. The significant effect was also found in terms of their thickness swelling and MoE after applying combination of those treatments. Furthermore, we found that the best treatment was observed from a 100% HDPE concentration due to its appropriate mechanical performance. [ABSTRACT FROM AUTHOR]

Currently, welding is commonly used to join ferromagnetic metals by arc welding, spot welding, friction welding, etc. Welding on ferromagnetic metals is easier to do than on non-ferromagnetic metals. Aluminum is a non-ferromagnetic metal. In this study, friction welding with aluminum was carried out. The welding process is carried out with variations in the frictional rotation speed of 2300 rpm and 3100 rpm, at a pressure of 100 psi and a time duration of 30 seconds. Tensile tests are carried out on the welding results. From the tensile test results obtained tensile strength 85.77 N/mm2, yield strength 68.96 N/mm2, strain 7.98 % on welding with a rotation speed of 3100 rpm, breaking in the welding area. The obtained tensile strength is 81.88 N/mm2, yield strength is 75.89 N/mm2, strain is 3.66% on welding with a rotation speed of 2300 rpm, and breaks in the welding area. The amount of rotation speed during the friction welding process affects the strength of the joint. [ABSTRACT FROM AUTHOR]

Education is something that can be seen as something that will bring someone to a better future. However, the main problem in education is that not all residents in an area have access to education, especially in developing countries such as Indonesia. One of the problems in the form of low physical facilities in the form of schools is quite a big influence on the inequality of education in Indonesia, including in Padang Cermin District. As a result of this, there is a pattern of distribution and affordability of school facilities that cannot be accessed by all residents in the area. The data in this study were obtained from school location points accompanied by administrative boundaries and road facilities, both main collector roads, arterial roads, local roads, and other roads. The method used in this analysis. The technique used in the process of processing school location data in this study is in the form of coordinates for the distribution of schools with the nearest neighbor analysis technique t (nearest neighbor analysis) and buffer analysis. The results of the analysis show that the distribution pattern of SD and SMA/SMK is clustered, while SMP has a random pattern. The affordability of SD is 91.6%, SMP is 33.3%, and SMA/SMK is 75%. [ABSTRACT FROM AUTHOR]

Lately, there have been more and more people having pets. Pet owners often lack knowledge about their pets, which can hurt pets (s). In this age, technology is developing rapidly. Through the presence of technology, the use of human labor can also be reduced. People used to find information in books, and now everything can be searched through the internet. However, sometimes information on the internet is not entirely accurate. Other than that, finding the right keyword to search for the appropriate topic is hard. Finding information can be easier if it is assisted by better technology, like a chatbot. A chatbot is an automatic robot chat that can reply to questions from users and find answers suitable for users' questions. Using chatbots, we can get the information we need in a more fun and exciting way because chatbots imitate how humans chat with others. This can make the information conveyed more clearly to the user. This paper focuses on how a chatbot can help pet owners get information about keeping their pets in good condition. This chatbot has a few methods: AI, UML, ML, AIML, and NLP. Through this application, pet owners will find it easy to find excellent and correct ways to take care of their pets. [ABSTRACT FROM AUTHOR]

Bacterial cellulose (BC) is a natural polymer produced from microorganisms with characteristics, such as a fibrous with porous structure, impressive mechanical properties, and high purity. The synthesis of BC nanocomposites reinforced by ZnO nanoparticles has been applied to increase their properties. The study aims to identify the structure of BC nanocomposites after being reinforced by ZnO nanoparticles. The methods included BC synthesis using pineapple peel extract in static fermentation for 10 days, the alkalization procedure, and defibrillation of Bacterial Nanocellulose (BNC) by high-pressure homogenizer. ZnO was added as a reinforcement with concentrations of 2.5%, 5.0%, and 7.5%, sonicated and dried in an oven at 60oC for 20 hours. BNC/ZnO nanocomposite was characterized using X-ray diffraction. This work shows that membrane BC has peaks at 18°, 22°, and 26°. After the addition of ZnO, the dominant peak is obtained at a diffraction angle of 14°, 16°, 22°, and 26°, and the amount of peak is increased. The addition of ZnO does not affect the crystal size of the membrane, but it affects the crystalization of BC, which is the addition of 7.5% ZnO maximizes crystallinity until 87.45%. In the future, this membrane will be developed as membrane filtration for wastewater treatment. [ABSTRACT FROM AUTHOR]

The most studied optimization objectives in most scheduling problems are cost and quality performance. Due to energy depletion and rising pollution levels, practitioners and researchers are increasingly interested in "low carbon scheduling" as a new scheduling model. The purpose of this research is to develope a Hybrid White Shark Optimizer (WSO) procedure for solving the low-carbon permutation flow shop scheduling (LCPFSP) problem. The proposed algorithm was created by combining the WSO and NEH procedures. Three experimental variations were used to evaluate the algorithm's performance with different population variations and iterations. The results show that increasing population and iterations can reduce LCPFSP carbon emissions. The algorithm comparison results show that the proposed procedure outperforms the Ant Lion Optimizer (ALO) and teaching-learning-based optimization algorithm (TLBOA) procedures. [ABSTRACT FROM AUTHOR]

Onyx waste from onyx material crafts is utilized as coarse aggregate in concrete mixtures. Onyx waste concrete and standard concrete have different characteristics and rheological properties when viewed from the physical and mechanical properties of the aggregates that form them. Rheological studies of fresh concrete in the onyx waste concrete mixture were carried out by comparing fresh concrete's workability performance and rheological parameters between standard concrete and onyx waste concrete. Concrete slump, slump flow, and compaction factor tests are a series of workability tests carried out to compare the performance of fresh concrete and compressive strength testing to determine the resulting compressive strength. The results showed that the performance or workability of fresh concrete increased with replacing coarse aggregate with onyx stone waste. The slump value increased by 42.42%, the slump flow test increased by 25.974%, 7.142%, and 13.889%, and the factor test compaction increased by 3.557%. Analysis of rheological parameters showed that replacing coarse aggregate with onyx waste reduced the viscosity and yield stress values. The viscosity value and yield stress decreased by 60.261% and 45.970%, respectively. Therefore, it can be concluded that the onyx waste concrete is more manageable to deform than the normal concrete. The compressive strength produced by the onyx stone waste still meets the requirements of the compressive strength criteria as structural concrete. [ABSTRACT FROM AUTHOR]

Medium voltage underground electric cables type 0.6/1 (1,2 kV) Cu/XLPE/DTA/PVC 3x150 mmsq failed in a relatively short time of application. It was found that the XLPE insulator of the cable was not completely cross-linked, as indicated by the presence of a signal assigned to grafted silane (Si-O-CH3 group) in the FTIR spectra of the insulation. The cross-linked density of the insulator was lower than a standard cable, as indicated by its lower gel content. This condition allows water to reside in the material, as shown by the significantly high moisture content of the insulator (0.28%, in contrast to the maximum allowance of 0.015%). The water may enter the system via the damages that may occur from improper handling during the cable installation. Excessive moisture content leads to water tree damage, which continuously grows larger as a result of continuous operation with loads up to 100%. At a certain point, the system could not contain the damage, and thus, total failure of the cable occurred. [ABSTRACT FROM AUTHOR]

Multilayered packaging (MLP) waste is one of Indonesia's most plastic waste types. MLP have various composition, ranges from paper to plastics to metals, and short lifespan making their waste management became harder. Here we present an innovative method to recycle multilayered packaging waste as a paving block. This can assist in providing a recycling process options on reducing the negative impact of MLP waste to the environment. Shredded MLP waste is mixed with shredded polyethylene (PE) bag waste then the mixture is processed by the hot press at 240°C. Six formulas were used to mold the paving block, and the weight ratio of PE to MLP were varied from 0.33 to 3. Paving blocks were tested for their compression strength, according to ASTM D695, to investigate the effect of MLP addition on compressive properties and its compliance to the compressive requirement from SNI 03-0691-1996. According to ASTM D792 and SNI 03-0691-1996, the density and water absorption tests were conducted to support the investigation. MLP Increment increases the compression strength and influences the density. MLP can act as binder and filler, thus filling the void inside the paving block and increasing compression strength. From the obtained results it can be concluded that LDPE_MLP (75) paving block can follow the SNI minimum requirement, in term of compression strength (50.4 MPa) and water absorption (9.95%). [ABSTRACT FROM AUTHOR]

This work reports on the synthesis, characterization, and performance of zinc oxide nanoflowers structure as an active material for ethanol sensors. The nanoflowers ZnO was synthesized by using glycerol as a capping agent and 2-propanol as a solvent under solvothermal conditions. Based on X-ray diffractometry analysis, the synthesized ZnO has a wurtzite structure (i.e., w-ZnO) with high crystallinity. Further analysis by scanning electron microscopy confirmed that the w-ZnO was formed from one and two-dimension nanostructure into a three-dimensional nanoflowers structure. The synthesized w-ZnO was then used as an ethanol sensor and showed the best performance at 300°C with a response value (Ra/Rg) of 17.3. However, it has a longer response time and recovery time than at 350°C. Our results suggest that the w-ZnO with nanoflowers structure is a promising material for ethanol sensors. [ABSTRACT FROM AUTHOR]

Multilayer packaging (MLP) is widely used in food packaging. Due to the high consumption of MLP, the amount of MLP packaging waste is also increasing. However, this MLP waste is difficult to be recycled and polluting the environment. This study reports the effect of Fly ash addition on the thermal conductivity properties of multilayer packaging (MLP) composite. MLPs with different fly ash content (0, 5, 10, 20, 30 and 40 wt.%) were mixed using single screw extrusion to form pelletized products. Furthermore, the pellet was processed by compression molding at 260℃ and 20 MPa for 15 minutes. The thermal conductivity properties were measured according to ASTM C1113. Moisture content and porosity were measured to support thermal conductivity analysis. The result shows that adding fly ash into MLP decreases the thermal conductivity of the composite. The porosity and moisture content influence the thermal conductivity of MLP fly ash composite. [ABSTRACT FROM AUTHOR]

WHO has declared COVID-19 as a global pandemic, through Pergub Bali No. 10 of 2021 concerning the application of discipline and law enforcement Prokes makes the demand for PPE increase. Denpasar City has the highest population density in Bali Province, so it has the greatest opportunity as the largest production of mask waste that can harm the environment. This study aims to estimate the generation of mask waste, find out the negative impact caused by the mask waste on the environment, determine public perceptions and behavior towards the management of the use of masks and the management of mask waste and model scenarios using dynamic systems. This study uses a mix method analysis method with a combination of sequential exploration (qualitative and quantitative), and perform modeling analysis using Powersim Studio 8 software. The results of the study estimate that in Denpasar City as many as 515,114 masks are used every day, through the mask life cycle assessment approach, the resulting Greenhouse Gas emissions are 10,418,226 kg CO2 Eq per year. The perception and behavior of the community towards the management of masks, the community has a fairly good attitude to use, good knowledge, and bad processing actions towards the processing of masks. Through the recommendation of community participation modeling in traditional scenarios, estimating the reduction of mask waste generation and emissions over the next 6 years by 1% [ABSTRACT FROM AUTHOR]