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All Journal BERKALA FISIKA JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) IJID (International Journal on Informatics for Development) Jurnal Abdi Insani Jurnal Inovasi Pendidikan dan Sains DEDIKASI: Community Service Reports Journal of Engineering and Applied Technology Jurnal Materi dan Pembelajaran Fisika Jurnal Pengabdian Masyarakat Bhinneka Jurnal Masyarakat Madani Indonesia Jurnal Pengabdian Masyarakat Bangsa Jurnal Rekayasa elektrika
Dewanto Harjunowibowo
Sebelas Maret University
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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A Counterfeit Paper Currency Recognition System Using LVQ based on UV Light Harjunowibowo, Dewanto; Hartati, Sri; Budianto, Aris
IJID (International Journal on Informatics for Development) Vol 1, No 2 (2012): IJID December
Publisher : Universitas Islam Negeri Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (870.108 KB) | DOI: 10.14421/ijid.2012.01202

Abstract

This research is aimed to test a paper currency counterfeit detection system based on Linear Vector Quantization (LVQ) Neural Network. The input image of the system is the dancer object image of paper currency Rp. 50.000,- fluorescent by ultraviolet light. The image of paper currency data was taken from conventional banks. The LVQ method is used to recognize whether the paper currency being tested is counterfeit or not. The coding was carried out using visual programming language. The feature size of the dancer tested object is 114x90 px and the RGBHSI was extracted as the input for LVQ. The experimental results show that the system has an accuracy 100% of detecting 20 real test case data, and 96% of detecting 22 simulated test case data. The simulated case data was generated by varying the brightness of the image data. The real test case data contains of 10 counterfeit paper currency and 10 original paper currency. The simulated case data contains of 11 original paper currency and 11 counterfeit paper currency. The best setting for the system is Learning Rate = 0.01 and MaxEpoh = 10.
Model Panel Surya Cerdas Dengan Sensor Pelacak Cahaya Matahari Otomatis Berbasis Mikrokontroler Harjunowibowo, Dewanto
BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.544 KB)

Abstract

This research aims to create a model of intelligent solar panels are able to follow the movement direction of the sun as an energy source based on microcontroller AVR ATMEGA. This study uses ATMEGA AVR microcontroller 16bit with injection of fuzzy logic programs. The system also created using 4 (four) sensors LDR and 5 (five) photodiode sensor. Integration of fuzzy logic, AVR ATMEGA and sensors capable of providing optimal results into a dynamic model of the solar panels that automatically and can be applied on a large scale. The results of this study is a prototype solar panel that is able to follow the movement direction of the sun based on microcontroller AVR ATMEGA 16. The solar panels model is capable of putting solar panel surface perpendicular to the direction of sunlight intensity can be detected along the sensor.   Keywords: smart panel, microcontroller, fuzzy logic, sensor
Pemberdayaan Masyarakat Melalui Pendidikan Studi Kasus Sinau Kawruh Bareng Di Desa Ngaru-Aru Kurniawati, Ridha Dwi; Devinta, Yuslana; Gibral, Nisa Khuriya; Khadri, Tabah Muhamad; Tyas, Aster Cahyaning; Ardiansyah, Farhan Ahmad; Yunianto, Muchsin Budi; Dharmawan, Muh Adhi; Pratiwi, Ratih Muliastry; Widiarti, Endang Retno; Harjunowibowo, Dewanto
Jurnal Pengabdian Masyarakat Bangsa Vol. 1 No. 9 (2023): November
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v1i9.414

Abstract

Pemberdayaan masyarakat melalui pendidikan memiliki peran kunci dalam meningkatkan kualitas hidup di komunitas pedesaan. Di Desa Ngaru-Aru, minat belajar siswa di sekolah menjadi isu utama yang perlu ditangani. Tantangan ini, yang mencakup kesulitan belajar, kurangnya dukungan orang tua, dan lingkungan belajar yang tidak kondusif, memerlukan tindakan konkret. Oleh karena itu, tim Mahasiswa KKN Desa Ngaru-Aru meluncurkan program "Sinau Kawruh Bareng" atau yang dikenal sebagai "Srawung". Program ini bertujuan memberikan bimbingan belajar gratis kepada siswa dan, pada saat yang sama, meningkatkan minat belajar mereka. Dalam pelaksanaannya, program ini berfokus pada disiplin, konsentrasi belajar, dan interaksi sosial di antara siswa. Hasil dari program ini menunjukkan peningkatan yang signifikan dalam minat belajar siswa dan pengembangan keterampilan mereka. Selain itu, "Sinau Kawruh Bareng" juga berhasil mempromosikan pentingnya pendidikan di luar lingkungan sekolah. Kegiatan ini berpotensi untuk memperkuat pemberdayaan masyarakat, terutama dalam hal pendidikan anak-anak. Kegiatan "Srawung" telah terbukti berhasil meningkatkan minat belajar siswa di Desa Ngaru-Aru, dan dapat dianggap sebagai langkah efektif dalam mengatasi masalah kesulitan belajar. Program ini menawarkan pandangan positif tentang peran pendidikan dalam mendorong kemajuan sosial dan kualitas hidup di komunitas pedesaan.
Pelatihan Dasar-Dasar Otomatisasi Berbasis Arduino Menyambut Revolusi Industri 4.0 Pada Siswa MA Al Madinah Boyolali Rezeki, Yulianto Agung; Harjunowibowo, Dewanto; Budiawanti, Sri; Jamaluddin, Anif; Rahmasari, Lita; Rahardjo, Dwi Teguh; Nugroho, Lilik Andre; Syamsuddin, Frendi Ihwan; Prasetyawati, Farah Yuki; Arifa, Aulia; Ulwan, Rozin Fata; Nugroho, Panji Setyo
Jurnal Pengabdian Masyarakat Bangsa Vol. 1 No. 9 (2023): November
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v1i9.430

Abstract

Pada era Revolusi Industri 4.0 berkembang internet of things dengan sangat cepat yang menandakan dunia industri telah mengalami kemajuan. Kemajuan ini adalah penggabungan teknologi otomatisasi dan teknology cyber. Kemajuan teknologi telah menghasilkan penemuan-penemuan penting, seperti otomatisasi, analisis data, simulasi, integrasi sistem, penggunaan robot, dan teknologi cloud untuk penyimpanan data. Hal ini menyebabkan terhubungnya semua sektor industri melalui website yang terintegrasi secara otomatis. Kemajuan teknologi telah mengubah kehidupan manusia, termasuk gaya hidup berkelanjutan. Sehingga masyarakat perlu menyesuaikan perubahan sejalan dengan transformasi digital. Digitalisasi memunculkan penciptaan robot-robot yang dapat membantu pihak industri. Namun adanya digitalisasi juga menimbulkan polemik di masyarakat, yaitu anggapan Revolusi Industri 4.0 yang menghadirkan robot sebagai pengganti peran manusia. Polemik ini berdasar dari ketidaktahuan masyarakat mengenai sistem otomatisasi dari robot. Maka menjadi peluang sekaligus tantangan bagi pengabdi untuk memberikan pengetahuan mengenai dasar-dasar sistem otomatisasi kepada peserta didik tingkat sekolah menengah atas.
Pembiakan Sirih Hitam pada Petani Plasma di Sukoharjo Harjunowibowo, Dewanto; Rinanto, Yudi; Ariyanto, Joko; Prasetya, Fajar; Swastika, Brilian
Jurnal Pengabdian Masyarakat Bangsa Vol. 2 No. 1 (2024): Maret
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v2i1.789

Abstract

Sirih hitam (Piper Betle Var Nigra) merupakan tumbuhan yang memiliki banyak manfaat untuk kesehatan. Namun, pertumbuhan daun sirih hitam tergolong lambat dibandingkan dengan tanaman serupa di alam bebas, sehingga harga pasarannya cukup tinggi. Metode pembiakan dengan stek telah dilakukan, namun kendala utamanya adalah sulitnya mengontrol kondisi lingkungan agar sesuai dengan kebutuhan tanaman. Kegiatan  ini bertujuan untuk mengenalkan pertanian modern dalam rumah kaca dengan sistem kontrol kondisi temperatur, kelembaban, dan intensitas cahaya secara otomatis. Hal ini diharapkan dapat mempercepat pertumbuhan sirih hitam dan menjaga kualitas zat aktifnya sebagai obat. Kegiatan dilakukan dengan membangun greenhouse semi permanen di Desa Triyagan, Sukoharjo, serta membuat 3 sistem kontrol untuk mengontrol intensitas cahaya buatan, suhu dan kelembaban ruangan, serta kelembaban tanah. Sistem irigasi yang digunakan adalah sistem spray karena jenis akar sirih merupakan akar merambat di permukaan tanah. Kegiatan ini menunjukkan bahwa dengan sistem budidaya modern dalam greenhouse dan pelatihan pembiakan sirih hitam dengan sistem stek terarah dan cangkok, mempercepat pertumbuhan sirih hitam dan menjaga kandungan zat aktifnya. Selain itu, pelatihan pemasaran bibit ke marketplace mampu menambah pendapatan bagi mitra. Selain itu, kegiatan ini diharapkan dapat memberikan kontribusi dalam pengembangan budidaya sirih hitam yang efisien dan berkelanjutan, serta memperluas wawasan masyarakat tentang pertanian modern.
Optimization of Electrospinning Temperature Control System IoT-Based with DHT21 Widayani, Della Astri; Hikamiah, Luluk Arifatul; Nugroho, Panji Setyo; Ariyanto, Dewa Pascal; Amaratirta, Jasmine Cupid; Harjunowibowo, Dewanto; Rezeki, Yulianto Agung
Jurnal Rekayasa Elektrika Vol 20, No 4 (2024)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v20i4.37537

Abstract

Electrospinning is a method of making nanomaterials that has a fairly easy and flexible process that can produce nanofiber continuously. Nanofiber morphology from the electrospinning process is influenced by several parameters, one of them is temperature as an environmental parameter. If there is no temperature control system in the electrospinning system, it will be difficult to maintain the consistency of the morphology nanofiber and at certain temperatures, nanofibers are not formed. Therefore, this study aims to develop a temperature control system for electrospinning called the Electrospinning Temperature Control (ETC) System and connect it with an internet-of- things (IoT) platform to understand the dynamics of the temperature control process, upload temperature data to the cloud, and remote monitoring. The method used by designing and building system hardware and software, calibrating DHT21 as a temperature sensor and testing system performance. The results show that the calibration of the DHT21 sensor has an accuracy rate of 94.95% and a precision rate of 98.93%, while the results of the performance test show that the system can raise, maintain, and lower the temperature. Further performance testing reveals that the ETC system can operate within a temperature range of 2040C. The IoT system using the Blynk App allows users to remote and monitor easily, and using Google Sheets as a cloud database. The ETC system was successfully built and can be applied to electrospinning experiments.
IoT-Based Humidity Control System for Electrospinning Hikamiah, Luluk Arifatul; Ariyanto, Dewa Pascal; Widayani, Della Astri; Nugroho, Panji Setyo; Amaratirta, Jasmine Cupid; Harjunowibowo, Dewanto; Rezeki, Yulianto Agung
Jurnal Nasional Pendidikan Teknik Informatika : JANAPATI Vol. 13 No. 2 (2024)
Publisher : Prodi Pendidikan Teknik Informatika Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/janapati.v13i2.75896

Abstract

In recent years, electrospinning has become the most common and most widely used nanofiber manufacturing method. One parameter affecting the manufacturing process is the humidity parameter, which affects the morphology. The control tools that have been developed have not been equipped with a remote control and monitoring system. This research aims to develop a humidity control system that can be controlled and monitored remotely and is equipped with data recapitulation. This research used methods from literature studies on humidity control systems, manufacture and assembly of hardware and software, calibration, and performance tests. A humidity control device is produced using a NodeMCU microcontroller connected to the IoT-based Blynk application. This can be controlled and monitored manually with an LCD and Keypad or by using a handphone through the Blynk application, and the humidity value can be recapitulated with Google Sheets in real-time. The sensor used for reading this humidity value is a DHT 22 sensor which has an accuracy value of 99.72% and a precision of 98.81% for 45%-95% humidity. This IoT-based humidity control system device can automate the process of controlling, monitoring, and recapitulating humidity data in real-time.
Enhancing Measuring Reliability: Calibration and Validation of IoT-based DC Power Logger Arifa, Aulia; Suharno, Suharno; Kamaruddin, Maqbul; Harjunowibowo, Dewanto
Journal of Engineering and Applied Technology Vol. 6 No. 01 (2025): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v6i01.83282

Abstract

A power logger is a device that has an electrical energy consumption monitoring function with an embedded data storage system to understand energy consumption patterns and improve the efficiency of energy usage. However, building meters without calibration causes inaccurate measurements and information. Therefore, the study reports a simple method to enhance any system's measurement quality via an Internet of Things (IoT)-based DC Power Logger case.  The IoT system built in the Blynk application enables the power logger to operate remotely and was integrated into a Google spreadsheet page to facilitate real-time data storage with an INA219 sensor as the measurement module. The calibration process of the power logger was conducted by comparing the measurement results obtained from the power logger with measurements obtained from a Sanwa multimeter. As a result, the calibration process ensures enhanced accuracy and precision of power logger measurements, which was validated by the validation process.
Students’ Creative Thinking Skills on Heat Phenomena Using POGIL Learning Model Pratiwi, Rinta Dian; Ashadi, Ashadi; Sukarmin, Sukarmin; Harjunowibowo, Dewanto
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 8 No 2 (2019): Jurnal Ilmiah pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v8i2.4629

Abstract

This research aimed to analyze the improvement of students' creative thinking skills on the topic of heat and its transfer using the POGIL model. The matter concerning heat and its transfer has some characteristics that enable students to carry out practicum and trigger them to develop their higher-order thinking skills. The method used in this research was pre-experimental with one group pretest-posttest design. A total of 32 seventh grade students at SMPN 1 Jaten Karang Anyar, Central Java, were randomly selected as the participants in this research. To measure the increase in students' creative thinking skills, a multiple-choice test had been developed based on the indicators of creative thinking skills. Based on the results of data analysis, the values of N-gain on the indicators consisting of fluency, flexibility, originality, and elaboration were 0.56, 0.60, 0.46, and 0.53, respectively. Those numbers meant that creative thinking was in the medium category. Further analysis shows that, by using the POGIL model on the topic of heat and its transfer learning, students’ creative thinking skills can be increased, especially on the indicators of fluency and flexibility.
Guided inquiry lab: Its effect to improve student’s critical thinking on mechanics Febri, Ade; Sajidan, Sajidan; Sarwanto, Sarwanto; Harjunowibowo, Dewanto
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 9 No 1 (2020): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v9i1.4630

Abstract

Learning trends in the 21st-century require students to have the ability to sort appropriate information from certain sources. To do this, students must have critical thinking skills. One of the learning models that can facilitate students to think critically is a guided-inquiry lab. Thus, the purpose of this study was to quantitatively analyze the impact of the implementation of the guided-inquiry lab model on students' critical thinking skills on mechanics material. A pre-experimental method employing one group pretest-posttest only design was applied to obtain students' critical thinking skills data before and after the implementation of the guided-inquiry lab model. A total of 32 students from a junior high school in the city of Karanganyar, Central Java, were involved as the samples in this study. The data obtained were then analyzed using N-gain calculations. Based on the data analysis, there are 81.25% of students have medium creative thinking skills after being taught with a guided-inquiry lab, meaning there is an increase in the average score of students after being taught using a guided-inquiry lab model. It can be concluded that the implementation of the guided-inquiry lab model is effective to improve students' critical thinking skills
Co-Authors Alfiani, Athifah Novi Amaratirta, Jasmine Cupid Amri, Saehful Anif Jamaluddin Ardiansyah, Farhan Ahmad Arifa, Aulia Aris Budianto, Aris Ariyanto, Dewa Pascal Ashadi Azizah, Salsabila Nur Cahyani, Riana Natifa Eka Cucuk Wawan Budiyanto Danar Susilo Wijayanto Desy Erma Putri, Desy Erma Devinta, Yuslana Dewanto Kamas Utomo Dewi Ratna Nurhayati Dharmawan, Muh Adhi Dwi Teguh Rahardjo Dyah Fitriana Masithoh Dyah P Febri, Ade Fitria Haryani, Fairusy Gibral, Nisa Khuriya Haq, Mufti Muammarul Hernawan, Aswin Nugrahandi Hikamiah, Luluk Arifatul Husnawati, Fina I Gusti Bagus Wiksuana Indah Widiastuti Istiqomah, Ainun Joko Ariyanto July Trianita Widya Rahayu Kamaruddin, Maqbul Kenny Anindia Ratopo, Kenny Khadri, Tabah Muhamad Kuncoro Diharjo Kurniawati, Ridha Dwi Laeli Nurajijah Latifah N. Q Lestari, Dian Permata Lina Wahyuningrum Lita Rahmasari Nonoh Siti Aminah Nugroho, Lilik Andre Nugroho, Panji Setyo Nurul Fitrianingrum Pawestri, Wari Prasetya, Fajar Prasetyawati, Farah Yuki Pratiwi, Ratih Muliastry Pratiwi, Rinta Dian Pujayanto Pujayanto Puspita Septim Wulandari, Puspita Septim Putri, Eva Rahayu Riyana Indah Setiyani, Riyana Indah Rosanti, Nyoman Meta Rosihan Ari Yuana, Rosihan Ari Rosihan Ariyuana, Rosihan Rosyidi, Farisa Ramadhani Safitri, Azizah Nur Sajidan Sajidan Sarwanto Sarwanto Sawitri, Andini Desi Shinta Melani Permatasari Siti Supeni Solikhah, Efi Nikmatu Sri Budiawanti Sri Hartati Suharno Suharno Sukamto, Ika Sumiyarsi Sukarmin Supurwoko Sutadi Waskito Swastika, Brilian Syafiah, Revalina Zulfalhutfi Syamsuddin, Frendi Ihwan Thrustho Raharjo, Thrustho Tyas, Aster Cahyaning Ulwan, Rozin Fata Widayani, Della Astri Widha Sunarno Widiarti, Endang Retno Y. Radiyono Yudi Rinanto Yuli Yanti Yulianto Agung Rezeki Yunianto, Muchsin Budi