<div><p class="Els-history-head">The world is facing the global trend of Industry 4.0 in the manufacturing sectors. The concept of the Internet of Underwater Thing (IoUT) presents the trends in the underwater region. The Autonomous Underwater Vehicle (AUV) as a data collector and transmitter becomes the central component in the connected system of the IoUT. The efficiency of the platform is crucial to lengthening the range and duration of the mission. The biomimetic method of utilizing the caudal fin propulsion could enhance the efficiency of the small and low-speed AUV. From the defense perspective, there is a concept of Revolution in Military Affairs (RMA) that supports technological modernization for defense purposes. Technically, this study aims to combine the technical aspects of mechanical engineering and the defense concept of RMA in the technological advancement of AUV for the advanced and efficient defense strategy in the underwater region. The evaluations involved numerical simulation with Computational Fluid Dynamics (CFD) method. The simulation results show that the fully tapered flexible fin enhances the efficiency by 25%, while the narrow flexible fin enhances the efficiency by 30%. These results indicate that a flexible tapered fin should be the primary consideration in designing the high-efficiency biomimetic fin. The visualization of the force vectors shows that the flexibility of the fin acts as a thrust vectoring factor that directs more force vectors in the thrust direction. This study supports the RMA concept implementation by technological modernization, such as efficient biomimetic AUV development, to develop doctrines in the State's defense in the underwater region.</p></div>

Land certification provides land legal certainty for every citizen of the Republic of Indonesia, especially, farmers, who constitute the majority of the population of Indonesia. The importance of the agricultural land has been explained in the Republic of Indonesia’s Defense White Paper that the growing amount of agricultural land has a detrimental effect on the Indonesian nation which is agrarian. Decreasing agricultural land is the main factor causing reduced food security. Geospatial technologies such as remote sensing and terrestrial surveys are very helpful for Complete Systematic Land Registration (PTSL) activities. However, the implementation in the field of technology has not yet been optimized due to the lack of the support from Regional Government and the Community. By taking the PTSL implementation in two villages in Barabai Subdistrict, Hulu Sungai Tengah Regency, it was found that problems related to the absence of certaintyof village boundaries, accurate and scattered control points and community understanding of the importance of the legality of their land are inhibiting factors for PTSL activities. By combining this technology with community participation it will produce the right and ideal combination.

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Kewajiban utama masyarakat akademis di lingkungan Program Studi (Prodi) Teknik Mesin Universitas Pertahanan Republik Indonesia (Unhan RI) adalah melaksanakan Tri Dharma Perguruan Tinggi, yang salah satu komponennya adalah Pengabdian Kepada Masyarakat (PKM). Berada di dalam kelembagaan Kementerian Pertahanan, masyarakat akademis di lingkungan Unhan RI ditekankan untuk menjadi cendekiawan Bela Negara. Oleh karena itu, Prodi Teknik Mesin Unhan RI merancang kegiatan PKM yang tidak hanya bertujuan untuk menerapkan keahlian Teknik Mesin bagi masyarakat umum tetapi juga menyebarluaskan semangat Bela Negara. Puncak dari setiap kegiatan PKM tersebut adalah pelaksanaan sosialisasi Bela Negara dalam rangka memberikan kesadaran pelaksanaan Bela Negara melalui profesi masing-masing. Artikel ini membahas terwujudnya sinergi Bela Negara dan Kemanusiaan melalui kegiatan PKM Prodi Teknik Mesin Unhan RI di Rumah Sakit Ibu dan Anak (RSIA) Melania Cibinong. Tahap pertama kegiatan PKM ini adalah penerapan keahlian Teknik Mesin melalui perbaikan berbagai peralatan pendukung operasional rumah sakit seperti komputer, genset dan alat RO (Reverse Osmosis). Selanjutnya, tahap kedua PKM ini adalah kegiatan sosialisasi Bela Negara pada pimpinan dan karyawan rumah sakit. Melalui kegiatan PKM ini, semangat Bela Negara masyarakat akademis di lingkungan Teknik Mesin Unhan RI terwujud melalui penerapan keahliannya dalam mendukung keberlangsungan pelayanan kemanusiaan terhadap masyarakat. Di lain pihak, pimpinan dan karyawan RSIA Melania Cibinong memiliki kesadaran bahwa Bela Negara dapat diwujudkan melalui tanggung jawab profesinya dibidang pelayanan kemanusiaan. Pemilihan institusi kesehatan sebagai tempat dilaksanakannya PKM Prodi Teknik Mesin Unhan RI menjadi contoh sinergi antara semangat Bela Negara dan Kemanusiaan yang mendukung kehidupan berbangsa dan bernegara yang sehat dan humanis.

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