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CALCULATION AND OPTIMIZATION OF FORCE AND POWER ON AUTONOMOUS SURFACE VEHICLE (ASV) AS MEANS OF MARINE ACCIDENT RESCUE Herlambang, Teguh; Nurhadi, Hendro
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 1 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss1pp0361-0372

Abstract

The strategic regional position makes Indonesia a world transportation crossing route with various modes of transportation through Indonesian territory to reach other islands, countries, or even continents. For this reason, a solution is needed to reduce the number of fatalities and injuries due to ship accidents that may occur. By reducing the evacuation time to a minimum, it will be possible to minimize the number of casualties and injuries if the ship has an accident. Considering that, in terms of usability and benefits, the Autonomous Surface Vehicle (ASV) can be an alternative as a form of Search and Rescue (SAR) ship. Based on the results of the ASV Ship design that suits these needs, a force and power analysis was carried out in accordance with the applicable theory. Of the 2 designs with a monohull shape and with different hull variations, with the main dimensions of the ASV Sang Nagari (LH=4.55 m, LWL=4.348 m, B=1.272 m, D=0.804 m T=0.45 m) and ASV Sang Nadibumi (LH=4.55 m, LWL=4.311 m, B=1.352 m, D= 0.802 m, T=0.4 m) obtained a displacement of 1.063 tons and a resistance of 1 kN for ASV Sang Nagari and 1.202 tons and a resistance of 2.6 kN for ASV Sang Nadibumi at a standard speed of 10 knots. Based on the results of the force analysis, it is concluded that the two ASVs have 2 forces in static conditions, that is, weight force and upward lift force (FBouyant). Based on the results of the efficiency of ASV Sang Nagari has a higher efficiency of 0.002% with 56.422% than ASV Sang Nadibumi with 56.420%.. The ASV linear model made from linearization has the properties of a controllable and observable, so this model can be applied to navigation and control systems.
UNDERWATER OBJECT SHAPE DETECTION BASED ON TONAL DISTRIBUTION AND EDGE DETECTION USING DIGITAL IMAGE PROCESSING Suryowinoto, Andy; Herlambang, Teguh; Baital, Muhammad Sawal; Tomasouw, Berny Pebo
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 1 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss1pp0395-0402

Abstract

Underwater exploration activities always have their own charm, many exotic objects that exist in underwater ecosystems have not been mapped properly, due to the lack of related databases of the shapes and names of these underwater objects. Another factor that affects the visibility of objects related to the quantity of light intensity that enters under water, also not as much above the surface of the abundant water, especially during the day. This also hinders the process of documenting underwater objects. The main purpose of this study was to obtain the shape of underwater objects for several conditions of light intensity under water using a low cost digital image sensor camera. The method used in this research is to combine tonal distributions with object edge detection in digital image processing. The test results show that object detection tests in clear and turbid water can detect objects even though they are using a low-cost and low-resolution camera, but with the help of adequate lighting it can be done. From that it can be concluded that the detection of underwater objects is successful.
TRACKING SYSTEM USING GPS AND SMART CARD AUTHENTIFICATION BASED ON ESP 32 MCU Suryowinoto, Andy; Herlambang, Teguh; Widjanarko, Angga Adhitya; Prabowo, Yuliyanto Agung; Tomasouw, Berny Pebo
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 2 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss2pp0751-0758

Abstract

Logistics distribution is a series of activities that are interconnected in each process. Therefore, an information system is necessary to record, report conditions, and display the current location of items directly. An Android-based application system is vulnerable to spoofing, such as fake GPS. The application is used to falsify the coordinates of digital map locations. This research aims to develop a common tracking system and prevent Fake GPS by employing the System Development Life Cycle method, consisting of several stages, i.e., planning, analysis, design, implementation, testing, and maintenance. In this research, a prototype of the tracker tool and its information system were made. It used an RFID Smart Card for courier identity authentication and a GPS module to track position information on a digital map. RFID and GPS were controlled using the ESP32. Furthermore, the Website served as an information system to read and create a QR Code to identify the goods carried. It received data from the RFID Smart Card and GPS, stored it in the Database, and displayed it online. The test results indicated that the tracker prototype succeeded in sending location data throughout the test and gained an average distance of 6.82 meters, which was different from a commercial GPS device. It had a delay of 268.5 seconds when the location was first read. The tracker prototype had an average power consumption of 1.5 watts, an average battery life of 2 hours, 28 minutes, and 40 seconds, as well as an average battery deficiency of 36.79%. In conclusion, the system test was successful.
PID PATH FOLLOWING CONTROL SYSTEM DESIGN ON UNMANNED AUTONOMOUS FORKLIFT PROTOTYPE Herlambang, Teguh; Indriawati, Katherin; Akbar, Reza Maliki; Nurhadi, Hendro
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 4 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss4pp2093-2112

Abstract

One of the technologies often used in material handling and material transport is forklift. Conventionally forklifts are operated by human operators. For efficiency, to improve security, safety, and occupational health and to minimize the risk of operators, forklifts can be automated. Therefore, the idea of unmanned autonomous forklift innovation was introduced. In this final project, a motion control system was designed for an unmanned autonomous forklift prototype both in simulation and hardware using PID control techniques, and the odometry system was equipped with a rotary encoder. In the simulation, the controlled variable was the distance and the manipulated variable was the force on the vehicle. Meanwhile, in the prototype, the controlled variable was distance and the manipulated variable was the motor pulse. In the simulation stage the PID control parameters were applied . with an error of 0.32% in the simulation. The PID control parameters were applied to the prototype, that is, . The distance tests were done with variation of 50 cm to 200 cm (25 cm intervals). One variation of the distance experiment was done 5 times. The average absolute error resulted was 2.36 cm.
COMPARISON OF NAÏVE BAYES AND K-NEAREST NEIGHBOR MODELS FOR IDENTIFYING THE HIGHEST PREVALENCE OF STUNTING CASES IN EAST JAVA Herlambang, Teguh; Asy'ari, Vaizal; Rahayu, Ragil Puji; Firdaus, Aji Akbar; Juniarta, Nyoman
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 4 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss4pp2153-2164

Abstract

Indonesia will experience a demographic bonus in 2030, where the productive age group will dominate the population and become a buffer for the economy. However, this potential is in vain if human resources experience stunting. According to WHO (2015), stunting is a disorder of child growth and development due to chronic malnutrition and repeated infections, characterized by below-standard length or height. Based on the background of the problem, the author wants to compare the prediction of the prevalence of the highest stunting cases in East Java using the Naive Bayes method and the K-Nearest Neighbor method. The stages carried out in this study are data collection, initial data processing, advanced data processing using the Naïve Bayes Method and K-Nearest Neighbor, and comparative analysis. The results of the implementation of the Naïve Bayes and K-Nearest Neighbor methods are in the form of stunting prevalence prediction charts with variables that affect LBW and TTD. The results of simulations conducted in 6 regions, the Naive Bayes method gets the highest accuracy value of 83.33% in simulation one and 66.67%. The smallest RMSE value is 0.382 simulation 1 and 0.469 simulation 2. This shows that the Naive Bayes method can predict well.
COMPARISON OF K-NEAREST NEIGHBOR AND NEURAL NETWORK FOR PREDICTION INTERNATIONAL VISITOR IN EAST JAVA Novita, Dina; Herlambang, Teguh; Asy’ari, Vaizal; Alimudin, Arasy; Arof, Hamzah
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 3 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss3pp2057-2070

Abstract

Tourism is one of the government's priority sectors for economic growth. East Java is one of Indonesia's provinces and is attractive to international visitors. International visitors will appreciate the natural beauty and multiculturalism offered by East Java. In this study, predictions of international visitor visits in East Java from the entrance of Juanda International Airport were carried out using k-NN (k-Nearest Neighbor) and a neural network. The dataset used is based on BPS statistics of Jawa Timur Province in the form of the number of international visitor arrivals from January 2000 to February 2024. The datasets were distributed by dividing the data into 70% for training data and 30% for testing data. The creation of the k-NN model is carried out using k-values 2 to 7. The creation of a modern neural network using hidden layers 1 to 3. The prediction results that were made using k-NN obtained optimal RMSE at k-values 2, resulting in an RMSE of 1594,674 or an error of 3,98%. Meanwhile, the prediction results that have been made using neural networks obtained optimal RMSE at two hidden layers, which resulted in an RMSE of 1873, 355 or an error of 4,68%. So, it is recommended that the k-NN algorithm be used to predict the number of international visitors in East Java. The results of this study can be used to provide quantitative information for the government and stakeholders in adjusting the program to the development of international visitors visiting East Java.
DIGITALISASI SISTEM PROMOSI DALAM MANAJEMEN PRODUKSI DI PABRIK ESSENTIAL OIL Putri, Nadita Mutiara; Fatikhasari, Niken; Isqi, Isye Fadiata; Farisi, Rizaldi Al; Mughni, Ahmad Syafiq; Katias, Puspandam; Anshori, Mohamad Yusak; Herlambang, Teguh; Sahri, Moch.
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 6 No. 4 (2025): Volume 6 No 4 Tahun 2025
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v6i4.49090

Abstract

Indonesia dikenal sebagai negara penghasil minyak atsiri dengan potensi ekspor tinggi, namun banyak industri kecil menengah masih menghadapi kendala dalam efisiensi produksi dan pemasaran akibat rendahnya pemanfaatan teknologi digital. Kegiatan Pengabdian kepada Masyarakat (PkM) ini bertujuan untuk menerapkan digitalisasi sederhana dalam manajemen produksi dan pemasaran di PT Unggul Herbal Atsiri sebagai bentuk solusi atas minimnya integrasi teknologi. Keterbaruan kegiatan ini terletak pada penggunaan pendekatan partisipatif berbasis teknologi digital dengan biaya rendah dan mudah diakses oleh pelaku usaha kecil. Metode pelaksanaan meliputi observasi awal, perencanaan solusi, penerapan digitalisasi, dan evaluasi hasil bersama pihak perusahaan. Pihak yang terlibat dalam kegiatan pengabdian ini terdiri dari pemilik usaha dan tenaga kerja di PT Unggul Herbal Atsiri. Prosedur kegiatan meliputi pembuatan konten pemasaran digital, penyusunan katalog produk, dan price list digital, serta pelatihan dasar penggunaan media sosial sebagai sarana promosi. Hasil utama yang dicapai antara lain peningkatan literasi digital staf, tersedianya konten digital siap pakai, dan penerapan sistem pemasaran yang lebih efisien dan sistematis. Hasil drai kegiatan ini menunjukkan bahwa penerapan teknologi yang sederhana dapat meningkatkan efektivitas dalam manajemen produksi dan memperluas jangkauan pasar, sejalan dengan teori keterlibatan masyarakat berbasis transformasi digital. Kesimpulannya, kegiatan ini memberikan dampak signifikan dalam meningkatkan efisiensi usaha serta mendorong transformasi digital pada sektor industri herbal lokal. Rekomendasi dari hasil kegiatan ini adalah perlunya replikasi program berbasis pelibatan komunitas di sektor industri lainnya untuk mendorong adaptasi teknologi secara berkelanjutan.
SOSIALISASI DAN PELATIHAN DIGITAL MARKETING DI PT UNGGUL TEKNOLOGI CERDAS Herlambang, Teguh; Anshori, Mohamad Yusak; Katias, Puspandam; Yudianto, Firman; Sahri, Moch.
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 6 No. 4 (2025): Volume 6 No 4 Tahun 2025
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v6i4.49091

Abstract

Di era digital saat ini, media sosial telah berkembang menjadi salah satu alat pemasaran yang paling berpengaruh dan efektif bagi perusahaan. Instagram, sebagai platform berbasis visual, menjadi pilihan utama dalam menyampaikan informasi produk dan membangun komunikasi antara brand dengan kunsumen. Desain konten visual yang menarik, konsisten, dan informatif di instagram mampu meningkatkan keterlibatan pengguna, memperkuat brand image, dan mendorong keputusan pembelian konsumen. Pemasaran Internet atau pemasaran elektronik (Internet marketing, e-marketing, atau online-marketing) adalah segala upaya yang dilakukan untuk melakukan pemasaran suatu produk atau jasa melalui atau menggunakan media elektronik atau Internet. Berdasarkan wawancara yang kami lakukan pada karyawan PT Unggul Teknologi Cerdas diketahui yang aktif menggunakan internet baik untuk mengerjakan company profil dan surat penawaran maupun untuk sosial media. Sehingga pada paper ini, dilakukan sebuah pelatihan Digital Marketing berupa penerapa desain konten video baik di Instagram atau feed untuk  membantu  pihak  perusahaan dalam mempromosikan produknya
PENERAPAN DESAIN KONTEN VIDEO SEBAGAI DIGITAL MARKETING DI PT UNGGUL TEKNOLOGI CERDAS Ardiansyah, David; Virniasai, Putri Yuliana; Pradana, Favian Aditya; Herlambang, Teguh; Anshori, Mohamad Yusak; Yudianto, Firman; Sahri, Moch.
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 6 No. 4 (2025): Volume 6 No 4 Tahun 2025
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v6i4.49092

Abstract

Pemasaran Internet atau pemasaran elektronik (Internet marketing, e-marketing, atau online-marketing) adalah segala upaya yang dilakukan untuk melakukan pemasaran suatu produk atau jasa melalui atau menggunakan media elektronik atau Internet. Di era digital saat ini, media sosial telah berkembang menjadi salah satu alat pemasaran yang paling berpengaruh dan efektif bagi perusahaan. Instagram, sebagai platform berbasis visual, menjadi pilihan utama dalam menyampaikan informasi produk dan membangun komunikasi antara brand dengan kunsumen. Desain konten visual yang menarik, konsisten, dan informatif di instagram mampu meningkatkan keterlibatan pengguna, memperkuat brand image, dan mendorong keputusan pembelian konsumen. Berdasarkan wawancara yang kami lakukan pada karyawan PT Unggul Teknologi Cerdas diketahui yang aktif menggunakan internet baik untuk mengerjakan company profil dan surat penawaran maupun untuk sosial media. Sehingga pada paper ini, dilakukan sebuah pelatihan Digital Marketing berupa penerapa desain konten video baik di Instagram atau feed untuk  membantu  pihak  perusahaan dalam mempromosikan produknya
How Transformational Leadership, Corporate Culture, and Intrinsic Motivation Shape Hospitality Employee Performance? Anshori, Mohamad Yusak; Rasyid, Reizano Amri; Herlambang, Teguh
Jurnal Manajemen Teori dan Terapan| Journal of Theoretical and Applied Management Vol. 18 No. 2 (2025)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jmtt.v18i2.72024

Abstract

Objective: Guided by Self-Determination Theory (SDT), this study investigates the effects of transformational leadership, corporate culture, and company values on intrinsic motivation and employee performance in the hospitality industry. Design/Methods/Approach: Data were collected from 277 hotel employees across multiple departments using structured surveys. Partial Least Squares Structural Equation Modeling (PLS-SEM) was employed to assess both direct and indirect effects among the variables. Findings: The results demonstrate that transformational leadership, corporate culture, and company values have a significant influence on intrinsic motivation, which in turn enhances employee performance. Intrinsic motivation acts as a key mediating mechanism linking organizational factors to performance outcomes. A strong organizational culture and value congruence emerge as critical drivers of employee motivation and effectiveness in the hospitality context. Originality/Value: This study contributes to the organizational behavior and human resource management literature by integrating multiple theoretical perspectives (SDT, Person–Organization Fit, and Full-Range Leadership Theory) into a unified model. The application of PLS-SEM provides robust insights into the psychological mechanisms that shape performance, particularly within service-intensive environments such as the hospitality sector. Practical/Policy implication: The study offers actionable insights for hospitality managers, including the design of leadership development programs, embedding organizational values into operational routines, and fostering cultures that meet employees' psychological needs. These interventions are essential for sustaining engagement and performance in dynamic service settings.
Co-Authors 'Arobi, Akhmad 'Izzul Abdul Muhith Adrianto, Dian Afiananda Rizky Afib Rulyansah Ahmad Syafiq Kamil Ajizah, Silvia Akbar, Reza Maliki Amri Rasyid, Reizano Andy Suryowinoto Arasy Alimudin ARDIANSYAH, DAVID Arief, M. Romli Arief, Mochammad Romli Arof, Hamzah Asy'ari, Vaizal Asy’ari, Vaizal Authar, Nailul Azmi Khulama Devi Azmi, Mohd Sanusi Baital, Muhammad Sawal Budiarti, Rizqi Putri Nourma Candra Ningrat Catur Wulandari Dennis V. Madrigal Diah Ayuningtyas Wati Dian Adrianto Diecky Adzkiya Dieky Adzkiya Dike Bayu Magfira, Dike Bayu Dina Novita, Dina Dini Ermavitalini Dinita Rahmalia, Dinita Elisa Qotrunnada Endang Sulistiyani Erna Apriliani Fajar Annas Susanto Fajar Annas Susanto Fajar Annas Susanto Fajar Annas Susanto Fajar Annas Susanto Farisi, Rizaldi Al Fatikhasari, Niken Fatmawati, Atika Fauji, Awwalinnisa Fidita, Denis Firdaus, Aji Akbar Hakiki, Moh Saiful Hamdani, M. Yusuf Hasan, Aldi Age Hasanah, alsabila Maulidah Hasanah, Indah Karimatul Hendro Nurhadi Hety, Dyah Siwi Ima Kurniastuti Isqi, Isye Fadiata Jauharotur Rihlah Karya, Denis Fidita Katherin Indriawati Khozin Mu'tamar Kresna Oktafianto Kresna Oktafianto Leni Yuliana M. Yushak Anshori Macap, Siti Rahayu Maghfira, Dike Bayu Maisyatul Fikriyyah Maulana Bayu Mayga Kiki Merta, I Wayan Surya Miftahul Huda Moch. Sahri Mohamad Rijal Iskandar Zhulqurnain Mohamad Yusak Anshori Mohammad Syaiful Pradana, Mohammad Syaiful Mokhamad Ramadani Ilham Akbar Mughni, Ahmad Syafiq Muhaimin Muhaimin Muhammad Halili Muhammad Nur Candra Mutia Annisaa’ Firdaus Nafa, Mulya Nyoman Juniarta, Nyoman Oktavianto, Lucky Othman, Zuraini Binti Pradana, Favian Aditya Pulih Asih, Akas Yekti Puspandam Katias Putri, Nadita Mutiara Rachma Rizqina Rachman Sinatriya Marjianto Rahayu, Ragil Puji Riansyah, Denny Fitrah Af Rita Sari Riyan Sisiawan Putra Rizky Ramadhan, Rizky Roebbi, aadiyah Rohman, Mochamad Khakim Santoso, Ismanto Hadi Saputro, Hendik Eko Septiyan Dias Anggoro Shiela, Fadia Jasmine Has Sigit Pancahayani Siswanti, Anas Tifa Rahma Sofia, Ainin Soraya, Sabrina Ifahdini Sri Hartatik Subchan Subchan Subchan Subchan Subchan Subchan Subchan, Subchan Sulistiyani, Endang Suprapto, Sena Sukmananda Supriyanto Supriyanto Susanto, Fajar Annas Susanto, Ismanto Hadi Teay Shawyun Thomy Eko Saputro Tomasouw, Berny Pebo Tri Deviasari Wulan Tri Deviasari Wulan Wulan Triono Bagus Saputro, Triono Bagus Triwinanto, Puguh Vicky Andria Kusuma Virniasai, Putri Yuliana Wahyu Wiji Lestari Widjanarko, Angga Adhitya Wulan, Tri Deviasari Wulansari, Tri Yudianto, Firman Yuliana, Leni Yuliyanto Agung Prabowo Zakaria, Moch Zhulqurnain, Mohamad Rijal Iskandar