The Study of Mixing Purple Sweet Potato and Turmeric Extract as Green Corrosion Inhibitor for API-5L in NaCl 3,5% Environment

Green inhibitors have become a major option for corrosion prevention since people are more aware of environmental damage. It is true that chemical inhibitors are more powerful at preventing corrosion, but its side effects are very harmful to the environment. Purple sweet potato (Ipomoea batatas L) in single use has been proven as an active inhibitor for certain applications. To improve this property, purple sweet potato is used as a mixed with other plants that contain antioxidant agents, such as ginger, melinjo, turmeric, jeera, etc. This paper discussed the effect of applying mixed extract of purple sweet potato with turmeric (Curcuma longa) as a green inhibitor to corrosion rate of API 5L steel in a 3.5% NaCl environment. Turmeric extract contains curcumin and kaempferol antioxidants while purple sweet potato extract contains antocyanin antioxidants. Corrosion rates were analyzed based on weight loss and polarization methods. The results showed the highest inhibitor efficiency was 82.54% achieved by 16 ml of turmeric mixed with 2 ml of purple sweet potato, and the optimum inhibitor efficiency was 74.2% achieved by 8 ml of turmeric mixed with 6 ml of purple sweet potato.

Sentiment Analysis of Face-To-Face Learning Based on Social Media

The use of restricted face-to-face learning during the epidemic in Indonesia was discussed not just by education and health professionals, but also on social media. The study used the Twitter dataset with the keywords 'school' and 'face-to-face' to examine public opinion about face-to-face learning. The research data was obtained from Twitter utilizing Drone Emprit Academic, and it was then processed using the Naive Bayes method to create sentiment analysis. During that time, research revealed that 32% of people were positive, 54% were negative, and 14% were indifferent. Because of worries about the dangers associated with the use of face-to-face learning, negative attitudes predominate.

Efforts to Improve Problem Solving Skills and Critical Thinking Skills Through Problem-Based Integrated Computer Assisted Instruction (CAI) in Vocational Education

Based on research conducted by PISA, the ability to solve problems and think critically of Indonesian students is still below the average score set by PISA. Problem based learning is one of the learning models recommended by the Ministry of Education and Culture to be applied in improving these abilities. However, the lack of problem-based learning that has been applied so far is the lack of use of media that can be used as support in learning activities, resulting in inconsistencies in the impact of problem-based learning in improving student skills. The importance of these skills for students to have in this era of the industrial revolution 4.0, makes educators have to be more creative and innovative in implementing learning. Therefore, this study aims at seeing efforts to improve problem solving skills and critical thinking skills through problem based integrated computer assisted instruction (CAI). This study used a quasi-experimental pre-test and post-test control group design. The population in this study were undergraduate students of Mechanical Engineering Education, Padang State University. The instrument used in this research is a questionnaire which is used to see students' problem solving and critical thinking skills. The data analysis technique in this study is in accordance with the research hypothesis, where research hypotheses 1 and 2 use independent sample t-test and research hypothesis 3 uses MANCOVA. The research covered by his study is in line with higher education's continuing search for effective SCL approaches

The Development of Movement System of The Second Six-Legged Robot PTE Unima

Engineering technology in robotics for the present era is no longer new, especially in high education, marked by Indonesian robot contests routinely held annually by the national achievement center. The participants in this event are groups of students from all higher education institutions spread throughout Indonesia. The development of robotics technology is now faster to spur individuals and students to compete to conduct research and development in robotics. The study aims to develop a six-legged robotic motion system or so-called hexapod. The research was conducted using the Addie model research method consisting of five stages, namely, analyze stage to analyze the needs of the development of the robotic motion system and analysis of the needs of tools and materials to be used. The design stage of designing the mechanical structure of the robot both in terms of hardware and in terms of robot software, the development stage of developing a six-legged robot's motion system to be more stable and more efficient in moving, the implementation stage is a test stage of the robot's motion system that has been developed. The evaluation stage is the last stage of this development research; at this stage, the evaluation is done to ensure the robot's motion system is feasible to use.

Development of Arduino Basic Learning Kit in Robotics for Beginner Level Learning

This Basic Arduino Learning Kit in Robotics is developed to help someone who wants to learn the basic concepts of Arduino and its operation in the field of robotics which is becoming increasingly important in our daily lives. In this learning kit, it provides three practical works that allow students to deepen their knowledge of the Arduino Uno microcontroller in robotics step by step. In Practical Work 1, students are exposed to the experiment of lighting three LED lights with pattern of running lights and flashing lights. In Practical Work 2, students are exposed to measurement work using ultrasonic detector and displaying its reading on a computer screen and on the screen of a mobile phone with the Android operating system via a Bluetooth module. In Practical Work 3, students are shown how to build a three -wheeled prototype robot and how to control the robot using a mobile phone with the Android operating system. The effectiveness of this learning kit has been tested in a learning workshop on 21 Pre-Diploma students of the Session of June 2020 Polytechnic of Sultan Mizan Zainal Abidin and has shown very encouraging feedback.

Evaluation of the Dimensions of the Tsunami Evacuation Path for the Community of Air Tawar Barat Village, North Padang District, Padang City, Based on Geographic Information System (GIS)

Air Tawar Barat Village is located in North Padang District, Padang City which is directly adjacent to the Indian Ocean in the west, so there is a risk of a tsunami disaster. The current evacuation route, which is one of the efforts to overcome the tsunami disaster, seems to be still ineffective to use because the distance that must be covered is 3-5 km in less than 30 minutes. This study aims to determine the direction of an effective evacuation route and then make a comparison with the evacuation route that has been determined by the Government. The method used is Network Analyst. The results of this study obtained 3 alternatives to make evacuation more effective. The alternative is to make access roads around Jalan Gajah to go to P-TES in the UNP area. Alternative 2 is to make P-TES in the parking lot of the Air Tawar Health Center so that people around the river mouth can evacuate faster because they are closer. Alternative 3, the community around the North Padang Police Sector can evacuate by heading to P-TES on Jalan Polonia, Air Tawar Timur Village to stay away from the beach. The three alternatives make the evacuation time to 10 minutes by heading to 26 P-TES. In addition, the evacuation map as a result of the analysis is more effective because the route has a route that is more likely to be taken by the community compared to the government evacuation map.

Productivity Analysis Using Method Murvin E. Mundel Case Study PT. Johan Sentosa

Productivity is an alternative to evaluating the performance that has been done even one of the most effective ways in assessing the efficiency of using several inputs in producing certain outputs. the study was conducted at PT Johan Sentosa. The company is engaged in processing palm oil into CPO (crude palm oil) and kernels. In this case, the company must replace an important process called the sterilizer system from the horizontal sterilizer to the vertical sterilizer. This change will certainly have an impact on company productivity. In this study, the method used is Marvin E Mundel where partial productivity will be identified in the form of depreciation value index, material, labor, energy, and maintenance, and know the total production value index. The results of this study obtained a partial productivity index on the declining workforce, other partial productivity such as depreciation, material, labor, energy, and maintenance have increased while the index value of total productivity increased after a change in the sterilizer system.

Potensi Kompetensi Keahlian Baru di Bidang Game pada Tingkat SMK

Abstrak — Sekolah Menengah Kejuruan adalah salah satu bentuk pendidikan formal yang menyelenggarakan pendidikan kejuruan pada jenjang menengah atas yang bertujuan untuk menyiapkan individu untuk siap kerja. Pada revolusi industri 4.0 ini Indonesia memerlukan sumber daya manusia yang banyak. Pertumbuhan industri game mengalami pertumbuhan sebanyak 9-12%. Ini menunjukan bahwa ada peluang dari industri game ini. Industri game adalah perpaduan dari seni dan teknologi. Oleh karena itu dibutuhkan orang yang terampil di bidang seni dan teknologi. Metode penelitian ini menggunakan metode deskriptif dan analisis kualitatif. Dilansir oleh CNBC (2019), Bekraf membutuhkan tenaga kerja digital sekitar 600 ribu pertahunnya dan belum bisa terpenuhi. Ini menunjukan adanya permintaan yang tinggi dari industri digital. Hasil survei yang dirilis oleh Bekraf bahwa industri game adalah industri yang gencar melakukan inovasi. Peminat game di Indonesia juga sangat banyak. Pemain game dari di Indonesia memiliki peringkat ke-16 di dunia. Pada tahun 2015, lulusan SMA sederajat mendominasi tenaga kerja di bidang ekonomi kreatif khususnya digital. Ini menunjukan bahwa lulusan SMK memiliki peluan besar untuk mengembangkan industri game di Indonesia. Kata Kunci: SMK, Pengembang Game, Kompetensi Keahlian

Perencanaan Sistem Digitalisasi Promosi pada Objek Wisata Colo Muria Kabupaten Kudus

Kepariwisataan merupakan suatu kegiatan bersifat multidimensional yang dapat menunjukan identitas tempat wisata, salah satu nya objek Wisata Colo Muria yang memiliki daya tarik dan kearifan lokal yang dapat dikunjungi oleh para wisatawan. Penelitian ini bertujuan untuk membuat perencanaan sistem digitalisasi pada objek wisata Colo Muria Kabupaten Kudus dengan menggunakan teknologi Augmented Reality. Metode penelitian yang digunakan adalah egile development. Langkah-langkah penelitian ini adalah Planning, Analysis, Design, Implementation, dan testing. Pada pengujian aplikasi, dilakukan dengan pengujian alpha berupa functional testing (uji black box), portablity testing dan pengujian beta berupa usablity testing (uji ahli media dan uji pengamat pengguna aplikasi). Pengujian alpha yang menguji aspek functionality menggunakan uji black box menunjukkan bahwa aplikasi berjalan dengan baik dan sesuai dengan yang direncanakan. Pengujian beta dilakukan oleh ahli media diperoleh hasil persentase 80%. Dari hasil ini dapat diketahui bahwa sistem digitalisasi pada objek wisata colo muria memiliki kemampuan yang baik, sehingga dapat dinyatakan layak digunakan sebagai sarana promosi wisata. Untuk pengujian beta dengan menggunakan uji responden, mendapatkan skor rata-rata akhir sebesar 79%, sehingga masuk dalam kriteria acceptable atau layak untuk digunakan. Saran yang diajukan untuk penelitian selanjutnya yaitu menambahkan video animasi perjalanan wisata dan animasi objek 3D yang lebih baik lagi agar sistem digitalisasi objek wisata colo muria lebih lengkap.

Evaluation of Implementation of Learning Practices During Pandemi Covid-19 Coating and Beauty Education Study Program

Quantitative data analysis carried out included data descriptions and respondent's level of achievement in 4 (four) components, namely: context (context), input (input), product (process), output (result). Based on the results of the research that has been done, all incoming data meet the requirements for processing and analysis. Quantitative data were collected through a questionnaire consisting of 27 questions that had been tested for validity and reliability. Furthermore, the questionnaire was given to 104 students of the Faculty of Tourism and Hospitality in the Department of Makeup and Beauty in 2018 which were filled in online via google form to answer the questions given about the evaluation of the implementation of practical learning during the Covid-19 pandemic, the make-up and beauty study program. . statistical data of research evaluation of the implementation of practical learning during the Covid-19 pandemic, Makeup and Beauty Education Study Program. The table above shows that the number of data (N) is 104, mean 106.66, median 107, mode 109, standard deviation 6.99, variance 48.86 range 33, minimum value 91, maximum value 124, and total Overall score of 11093. To complement the research data collected through questionnaires, the researcher also collected data by conducting interviews with several respondents, namely 4 lecturers of makeup and beauty at UNP. When conducting interviews, data were recorded and important points were recorded from the contents of the interview. Interview data were collected by researchers related to components in the evaluation of practical learning during the Covid-19 pandemic of make-up and beauty education study programs, namely components of context (context), input (input), process (process), and product (result).