Penelitian-Penelitian Dari Ranah Teknik Untuk Meningkatkan Kualitas Sumber Daya Manusia melalui Inovasi Penelitian dan Pengabdian kepada Masyarakat

It is hoped that increasing economic growth can be directed at increasing public income and meeting daily needs. The aim of this research is to determine the influence of service quality variables (X1), price (X2), and promotion (X3) on purchasing decisions at PT Asia Paramita Indah Batam (Y). In this research, the sampling process was carried out using a non-probability sampling method, namely a sampling technique that does not provide an equal opportunity to be selected into the sample. For sampling, the author used a saturated sampling method. Based on the sampling technique above, using a saturated sampling method from a total population of 135 people, 135 people were taken as a sample. Data was collected using a questionnaire which was measured using a Likert scale. This research uses multiple linear regression analysis with the help of the SPSS version 20.0 program. The results of this research show that the variables service quality (X1), price (X2), and promotion (X3) simultaneously influence purchasing decisions at PT Asia Paramita Indah Batam. The variables service quality (X1), price (X2), and promotion (X3) partially influence purchasing decisions at PT Asia Paramita Indah Batam

Pretest-Posttest Control Group Design of Discovery Learning-Based Content Learning System in The Materials of Atomic Structure and Periodic Elements System of Class X Vocational Schools To Improve High-Level Thinking Ability

A learning process in the form of electronics employing online learning and merging discovery learning learning models is known as a discovery learning-based content learning system. This study sought to determine the efficacy of a content learning method based on discovery learning for class X SMK students studying periodic systems and atomic structure material. This study employs the ADDIE development model, which is only applicable to the implementation stage and whose efficacy is being evaluated on a limited scale. Higher-order thinking abilities and student learning outcomes are impacted by the findings of measuring the efficacy of the discovery learning-based content learning system, as shown by an increase in the average score from the pretest to the posttest. The results of the t-test showed sig (2-tailed) 0.05, indicating that there is a significant difference between the learning outcomes and HOTS of students who use and don't use a content learning system based on discovery learning. This implies that content learning systems based on discovery learning on content related to atomic structure and the periodic system of elements are effectively designed to enhance student learning outcomes and higher-order thinking skills

Insilico study of stigmasterol extracted from pluchea indica as antiferility in men

Docking is a method to predict the strength of the interaction between the receptor and the ligand based on the binding affinity value. The docking carried out in this study is a specific docking with a grid box imitating the bond between AR and inhibitor control drugs. This study aimed to investigate stigmasterol from beluntas leaves potential molecularly as antifertility in men. This type of research is descriptive and exploratory. The research was carried out from November to December 2019. The research was carried out with the help of Indonesia's Bioinformatics and Biomolecular Analysis Organization (INBIO). Method of analysis with 3 steps: (1) Looking for a collection of metabolites and pass online, (2) molecular docking and MD simulation, and (3) drug-likeness and toxicity. Determination of compound potency based on binding affinity value. The more negative the binding affinity, the stronger the interaction between the receptor and the ligand. The results showed that it was predicted that stigmasterol could attach to the same active site (of Methyltrienolone) as the control to affect AR. Stigmasterol has a binding affinity value close to that of the inhibitor control, which is -5.4 kcal/mol, while the inhibitory control has a binding affinity value of -4.6 kcal/mol. The ideal value for control is -7 kcal/mol. The results of the MD Simulation analysis found that the AR-Stigmasterol complex was more stable than the AR-Cyproterone acetate complex due to its lower RMSD and RMSF values. The finding of this study confirmed that stigmasterol from beluntas leaves has the potential as an antifertility for men

Phototransformation of Linear Alkylbenzene Sulphonate (LAS) Surfactant Using ZnO-CuO Composite Photocatalyst

The aim of this study was to observe the effect of composition ratio of precursor and mass of ZnO-CuO for photodegradation of Linear Alkylbenzene Sulphonate. Material synthesis is done by solid stated process. The ZnO-CuO composite was characterized using DRS-UV and FTIR. The percentage of degradation was obtained from the absorbance value measured using a UV-Vis spectrophotometer. The ZnO-CuO composite photodegradation activity in 2: 1 ratio was 54.71% for 105 minutes irradiation. The degradation percentage of ZnO-CuO composites have higher photocatalytic activity than single ZnO (53.64 %) and CuO (52.21 %) semiconductors in degrading LAS.     Keywords: phototransformation, surfactant, LAS, composite, ZnO-Cu

The Development of the Educational Game to Improve Logical/ Mathematical Intelligence

The purpose of this study was to examine the educational games to improve logical/mathematical intelligence for early childhood education. In this study, logical/mathematical intelligence included the aspects of symbolic thinking, problem-solving, and logical thinking. The educational games were designed to stimulate children to think analytically or to have a higher-order thinking. This study used the ADDIE model. The results indicated that the games were valid and very feasible to use with an average score of 0.88. Additionally, the results of the practicality test of educational games were good. Also, the result indicated that the games had 87% for the effectiveness. Based on the results of the study on three aspects (symbolic thinking, problem-solving, and logical thinking), symbolic thinking and problem solving can be improved independently only with the help of audio, but for the logical thinking aspect, teacher assistance was needed to complete the game

Electrolyte Optimization Study on Dry Cell Generator Electrolysis System for Producing Hydrogen Gas Using RSM Method (Response Surface Method)

This study aims to determine the optimum condition of hydrogen gas produced through the electrolysis process of dry cell  generators using RSM progran. To produce hydrogen gas is done through the method of water electrolysis by decomposing the molecule H2O into hydrogen gas and oxygen gas with the help of direct electric current. Hydrogen gas productivity by electrolysis method applied to DC generators using 4/4 plate electodes (Cu/Al) as cathodes and NaNO3 solutions as electrolytes. The current and voltage used in this electrolysis process is 0.6 ampere and 2 volts for 1 hour. The concentration of hydrogen gas produced is determined using the MQ-8 sensor. The optimum condition of hydrogen gas concentration obtained is at NaNO 31 M concentration and 60 minutes with hydrogen concentration produced as much as  143.393 ppm. The verification result value for hydrogen gas concentration is 144 ppm, so the program's recommended solution is good enough

Module Development on Basic Laws of Chemistry Based on the 5E Instructional Model to Improve Science Process Skills in Senior High School

The module is one of the teaching materials that is arranged as a whole and systematically. Modules based on learning models can change learning patterns from teacher center to student center. One of the learning models developed specifically for subject matter in the field of science is 5E instructional. The 5E Instructional Model consists of 5 stages namely engagement, exploration, explanation, elaboration and evaluation. The purpose of this study was to develop an instructional module based on 5E chemical laws to improve the process skills of science students. The type of research conducted is research & development (R&D) with the ADDIE development model. The results obtained for the validity of the construct and content were 0.89 and 0.91 with the valid category. Based on the results of the teacher and student response questionnaires, an average practicality score of 86.96% and 86.10% was obtained in the very practical category. The results of the effectiveness test conducted in the experimental and control classes showed that the N-gain value for the experimental class was higher than the control class, namely 0.84 and 0.79. Based on the results of the t-test on student learning outcomes, it was found that tt < th means that the learning outcomes of classes using the 5E instructional module were significantly higher compared to classes that did not use the 5E instructional module. Therefore, it can be said that the 5E-based basic chemistry law module is valid, practical, and effective. The effectiveness of the developed module is seen from the learning outcomes of students and science process skills, so that this module can already be used in the learning process

Development of a Digital Dip Coating System Based Microcontroller

Coating techniques are important parts in the development of nano material technology. In this paper, the development of coating technology based on microcontroller using dip coating is presented. Arduino microcontroller is implemented to control the immersion time and the speed of withdrawal of material out of the coating fluid through a stepper motor. In addition, the withdrawal speed can be digitally entered through a keypad with a value range of 0.02 mm/s to 10 mm/s. The experiment results showed the percentage of accuracy and precision of the microcontroller based dip coater was very high. Based on these results, the developed dip coater is satisfied to be used in the development of nanotech material

DISAIN GEOMETRI REAKTOR FOTOSEL CAHAYA RUANG

This research aims to obtain reactor design photocells that can convert light energy into electrical energy space. Room light energy derived from sunlight that comes into the room and fluorescent light irradiation. Photocells reactor using a panel of copper oxide (Cu2O/CuO) of calcined Cu plate and filler electrolyte Na2SO4 0.5 N. The design of the geometry of the reactor photocells covering thickness of the glass pane, the distance between the electrodes, the interface layer, layer and coating reflector panels, and junction type np used. Reactor photocells 1 (R1) and 2 (R2) is identical in geometry to the thickness of the glass panel 3 mm thick reactor 15 mm without anti reflector, but the difference at the junction of type n, (R1 = plate Cu; R2 = plate Aluminum) generate 182.82 mW/m2 and 21119644.3 NW/m2. Design R3 (junction-type n = plate Cu) and R4 (junction-type n = plate Al), a panel thickness of 15 cm and has a layer anti reflector provide power 214.95 mW/m2 and 24163298.3 NW/m2. Design Reactor 5 (R5 = Cu) and R6 (Al), thickness of 9 mm, the distance between the electrodes 0:30 mm, using anti reflector carbon, giving each the power of 277.36 mW/m2 and 31258420.91 NW/m2. The most optimum reactor design is the design of R6 with 2:14% conversion capabilities (Intensity = 90.21 foot candles) for the sunlight into the room

Computational Calculation and Molecular Docking of Thymol and O-Benzoyl Thymol as Inhibitor TYK2 Enzyme

Thymol is the active ingredient in plants from Thymus vulgaris (thymus). The calculations and molecular docking have been done computationally for the thymol and o-benzoyl thymol. This computational calculation aims to obtain a stable structure and electronic properties of thymol and o-benzoyl thymol. The computational analysis used DFT for geometry optimization in the gas phase using B3LYP functional and 3-211G(d) as the basis set. The optimized structure of thymol and o-benzoyl thymol is not planar. The functional benzoyl decreases the bond length, increases the bond angle, and turns the dihedral. The electronic properties, such as atomic charge and density of HOMO-LUMO, show the difference between the two molecules. The optimized structure of thymol and o-benzoyl thymol is used for molecular docking with the TYK2 enzyme (tyrosine kinase). In this research, thymol and o-benzoyl thymol can inhibit TYK2 enzyme with the bond affinity is about -5.909 kcal/mol and -7.456 kcal/mol, respectively, for thymol o-benzoyl thymol. The primary molecular interaction is hydrophobic