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All Journal Jurnal Pendidikan Karakter Jurnal Visi Pengabdian Kepada Masyarakat Jurnal Maritim Polimarin International Journal of Educational Research Excellence (IJERE) Indonesian Research Journal on Education Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Jurnal Ilmu dan Inovasi Fisika SOROT: Jurnal Pengabdian Kepada Masyarakat Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia
Prijo Harsono
Politeknik Maritim Negeri Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering 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 Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Peranan Tallyman Dalam Menunjang Kelancaran Kegiatan Bongkar Muat di Pelabuhan Tanjung Emas Semarang Juwarlan Juwarlan; Prijo Harsono
Jurnal Maritim Polimarin Vol. 6 No. 1 (2020)
Publisher : PPPM Polimarin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (170.298 KB)

Abstract

This research discusses the role of tallyman in supporting the smooth loading and unloading activities at the port of Tanjung Emas Semarang. The main problem in this study is to determine the role of tallyman in supporting the smooth running of loading and unloading activities at the port of Tanjung Emas Semarang and and how influential the role of tallyman is in supporting the smooth running of loading and unloading activities at the port of Tanjung Emas Semarang. The purpose of this study was to determine the role of the tallyman in supporting the smooth loading and unloading activities at the port of Tanjung Emas Semarang and to determine the effect of the role of the tallyman in supporting the smooth running of loading and unloading activities at the port of Tanjung Emas Semarang. This type of research is causal associative with a quantitative approach. The data collection method consists of three ways, namely: observation, questionnaires, documentation. The samples in this study were employees of 2 loading and unloading companies and a company using tallyman services operating at the port of Tanjung Emas Semarang with a total sample of 51 respondents. The instrument validation test was carried out by using correlation techniques (statistical product and service solutions and the instrument reliability test using Alpha Crombach which was calculated using SPSS version 19. The test results with SPSS 19 obtained that the regression coefficient value has a positive direction and the value of t count = 11.480 with a significance level of 0.000. By using a significance limit of 0.05, the significance value is 0.000, 0.05. Meanwhile, from the results of statistical calculations using SPSS 19, the Adjustered R2 value is 0.723.This means that 72.3% of the smooth loading and unloading activities can be affected by tallyman while the rest amounted to 27.7% influenced by other factors.
PERAWATAN MESIN TEMPEL PENANGKAP IKAN GUNA MENUNJANG KELANCARAN PENGOPERASIAN PERAHU NELAYAN DI KARIMUNJAWA Ngatmin Ngatmin; Yulius Oscar; Gunawan Budi Santoso; Juwarlan Juwarlan; Prijo Harsono
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 1 No. 4 (2022): Desember : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (863.025 KB) | DOI: 10.58192/ocean.v1i4.431

Abstract

Community Service is an obligation for lecturers to carry out the Tridharma of Higher Education. The activity was carried out on June 18, 2022 in Jelamung RT 05 RW 02, Kemujan Karimujawa which was attended by 12 participants. The purpose of this service is to know how to maintain fishing boat outboard engines in general, which is used to change the engine oil, cleaning the air filter and fuel filter, testing the injectors and adjusting the valves, in addition it is to know the reason why the engine cannot start. Therefore, someone should check the fuel flow, opening the fuel filter and cleaning it. The implementation of this program is for fishermen’s beneficial, hance they can maintain and overcome engine damage for the sake of progress and increase the income.
TEKNIK PENGELASAN SMAW DAN KESELAMATAN KERJA MELALUI PELATIHAN LAS DI DESA BEJI UNGARAN Arif Rakhman Suharso; Wahyu Ari Putranto; Khaeroman; Prijo Harsono; Ario Hendartono
Jurnal Visi Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2023): Jurnal Visi Pengabdian Kepada Masyarakat : Edisi Agustus 2023
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/pengabdian.v4i2.1333

Abstract

Mesin las jenis SMAW merupakan jenis mesin las yang sering kita jumpai baik untuk skala perorangan maupun untuk skala industri. Keterampilan menggunakan mesin las sangat diperlukan baik utnuk berwiraswasta maupun untuk bekerja di industri. Selain itu faktor keselamatan juga perlu diperhatikan saat proses pengelasan. Ungaran merupakan salah satu Kecamatan di Semarang yang terdapat banyak perumahan yang membutuhkan kanopi dan pagar dari besi serta banyak terdapat industri yang membutuhkan operator las. Sebagai dosen di Jurusan Teknika Politeknik Maritim Negeri Indonesia maka diadakan pelatihan las menggunakan mesin las jenis SMAW serta pengetahuan tentang keselamatan dalam pengelasan. Kegiatan ini mendapat sambutan yang baik dari warga kelurahan Beji kecamatan Ungaran Timur sekaligus memperkenalkan kampus baru Politeknik Maritim Negeri Indonesia yang terletak di Kelurahan Ngobo yang berbatasan langsung dengan Kelurahan Beji.
Analisis Gugus Fungsi, Morfologi dan Ukuran Partikel Manganese Ferrite yang Disintesis dari Pasir Besi Heri Kiswanto; Indah Nurhidayati; Ario Hendartono; Prijo Harsono; Ngatmin Ngatmin
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 7, No 2 (2023)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v7i2.47022

Abstract

Manganese ferrite (Mn ferrite) telah berhasil disintesis dengan metode kopresipitasi pada suhu 60 ℃. Mn ferrite disintesis dari pasir besi sebagai prekusornya. Tujuan dari penelitian ini untuk mensintesis Mn ferrite dari pasir besi dan menganalisis gugus fungsi serta morfologinya. Sampel dibuat dengan memvariasikan NaOH yaitu 3 M, 6 M dan 9 M. Struktur kristal, gugus fungsi dan morfologi dikarakterisasi dengan X-ray Difractometer (XRD), Fourier Transform Infra Red (FTIR), dan Transmission Electron Microscopy (TEM). Hasil spektra FTIR mengkonfirmasi adanya gugus fungsi metal-oxide (M-O) pada kisi tetrahedral dan oktahedral pada bilangan gelombang masing-masing 462 cm-1 dan 578 cm-1. Hal ini diidetifikasi sebagai gugus Mn-O dan Fe-O sekaligus mengkonfirmasi pembentukan struktur spinel. Pengamatan morfologi menunjukkan bahwa sampel terlihat mengalami aglomerasi karena adanya interaksi magnetik. Hasil pengamatan ukuran partikel berada pada kisaran 30 – 50 nm yang diukur menggunakan software Image-J. Ukuran butir terlihat lebih besar dibandingkan hasil perhitungan ukuran kristalit berdasarkan data XRD karena sampel mengalami aglomerasi sehingga beberapa butir menggumpal menjadi satu dan terlihat seperti satu partikel.Kata kunci: Mn-ferrite, gugus fungsi, morfologi, ukuran partikel
Pengenalan Autonomous-Vessel untuk Siswa SMA 14 Semarang Melalui Kegiatan Webinar Heri Kiswanto; Ario Hendartono; Sri Tutie Rahayu; Purwanto Purwanto; Evie Sirait; Dhesi Wulan Sari; Prijo Harsono; Widar Bayu Wantoro
SOROT : Jurnal Pengabdian Kepada Masyarakat Vol 2 No 2 (2023): Juli
Publisher : Fakultas Teknik dan Ilmu Komputer (FASTIKOM) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/sorot.v2i2.5188

Abstract

Pengenalan teknologi otonom (autonomous technology) telah membawa dampak besar dalam berbagai bidang, termasuk industri perkapalan. Dalam hal ini, kegiatan pengabdian masyarakat ini bertujuan untuk menyelenggarakan kegiatan edukasi tentang konsep dan manfaat kapal otonom kepada siswa-siswa SMA 14 Semarang. Kegiatan ini dilakukan dalam bentuk webinar yang menghadirkan tenaga ahli seperti dosen dan atau praktisi di bidang kapal otonom (autonomous vessel) otonom sebagai pembicara. Peserta diberikan kesempatan untuk memperoleh pemahaman yang lebih baik tentang teknologi otonom (autonomous technology) dan mengajukan pertanyaan terkait topik ini. Hasil dari kegiatan ini diharapkan dapat mempersiapkan siswa untuk menghadapi masa depan yang semakin terhubung dengan teknologi.
Pendampingan Penyuluhan Metode Kolam Bioflok Kelompok Budidaya Ikan Karya Maju Ungaran Ngatmin, Ngatmin; Oscar, Yulius; Santoso, Gunawan Budi; Suyono, Suyono; Harsono, Prijo
Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia Vol. 2 No. 4 (2023): Desember : Jurnal Hasil Pengabdian Masyarakat Indonesia
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/karunia.v2i4.1929

Abstract

The Community Service was carried out in Beji Village, East Ungaran District, which consisted of 13 RW 51 densely populated RT. Most of participant work in the private and government sectors. Some of entrepreneurs are held fish farming which are managed by the community as an additional necessity for life. To sum up, the implementation of Community Service in Beji village, sub-district East Ungaran can be concluded as follows: Community service activities in Beji Village, East Ungaran District, Semarang Regency run well so that participants gained knowledge which can be implemented. Participants were given an explanation on how to make good Biofloc pond fish food and providing tarpaulins to partners as a form of concern for developing biofloc ponds.
Critical Thinking And 21st-Century Skills: Evaluating The Effectiveness Of Problem-Based Learning Models In Multicultural Classrooms Suyono; Juwarlan; Prijo Harsono; Erwin Sutantyo; Putranto, Wahyu Ari
International Journal of Educational Research Excellence (IJERE) Vol. 4 No. 2 (2025): July-December
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55299/ijere.v4i2.1478

Abstract

This qualitative study examines the effectiveness of Problem-Based Learning (PBL) models in developing critical thinking and 21st-century skills among middle school students in multicultural classroom environments. Through an interpretive qualitative approach employing in-depth interviews, classroom observations, and focus group discussions, this research explores how PBL methodologies foster active learning and enhance students' analytical capabilities across diverse cultural backgrounds. The study involved 24 middle school teachers and 72 students from three multicultural schools in Indonesia, implementing a purposive sampling strategy. Data analysis utilized Braun and Clarke's reflexive thematic analysis framework to identify patterns and themes related to critical thinking development and cross-cultural learning experiences. Findings reveal that PBL significantly enhances students' critical thinking abilities, promotes collaborative problem-solving skills, and facilitates meaningful cross-cultural interactions. The research demonstrates that multicultural PBL environments create authentic learning opportunities where students develop both cognitive and social competencies essential for 21st-century success. However, implementation challenges include teacher preparation requirements, resource limitations, and the need for culturally responsive instructional materials. The study concludes that well-structured PBL approaches in multicultural settings effectively prepare middle school students for complex problem-solving while fostering intercultural understanding and communication skills. These findings contribute to educational scholarship by providing evidence-based insights into the integration of active learning methodologies with multicultural education frameworks
Optimization of CNC Machining Parameters (Cutting Speed and Feed Speed) on 7075 Aluminum Material to Achieve Minimum Surface Roughness Harsono, Prijo; Suyono, Suyono; Noviarianto, Noviarianto; Putranto, Wahyu Ari
Indonesian Research Journal on Education Vol. 5 No. 6 (2025): Irje 2025
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/irje.v5i6.3671

Abstract

This study examines the optimization of CNC milling machining parameters on 7075 aluminum material to achieve minimum surface roughness through a qualitative research approach. 7075 aluminum is a high-grade aluminum alloy with superior mechanical properties that is widely used in the aviation and automotive industries. The study was conducted by analyzing the effect of cutting speed (Vc) and feed rate (f) on the surface quality of the machined results. The research method uses a qualitative descriptive approach through in-depth observation data collection techniques, structured interviews with operators and technicians, and documentation of the machining process. Research data were obtained from surface roughness measurements using a surface roughness tester (Ra) and visual analysis using machine vision techniques. The results of the analysis show that the combination of an optimal cutting speed of 300-400 m/min and a feed rate of 0.1-0.15 mm/rev produces the lowest surface roughness on 7075 aluminum material. The use of appropriate coolant and maintenance of carbide cutting tools are very significant in achieving optimal surface results. The findings of this study are expected to provide practical guidance for the manufacturing industry in optimizing the CNC machining process for 7075 aluminum material to improve product quality and productive efficiency while still considering industrial sustainability.
How Spiritualization of Maritime Science Learning in Vocational Higher Education is Carried Out? Aufi, Ahmad Umam; Kumara, Rahindra Bayu; Kurniawan, Fajarsari; Alimatussa'diyah, Alimatussa'diyah; Harsono, Prijo
Jurnal Pendidikan Karakter Vol. 16 No. 1 (2025)
Publisher : Directorate of Research and Community Service, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpka.v16i1.83933

Abstract

 The revitalization of vocational education is suspected of only highlighting the cognitive and psychomotor aspects in preparing human resources in the world of work. In fact, the affective aspect is a crucial aspect in the goals of national education that needs attention. This study aims to examine the implementation of vocational learning within the framework of revitalizing vocational education with a spiritualization perspective. This study describes the process of learning maritime science in Vocational Higher Education (PTV) and analyzes the spiritualization process in it as a reference for a spiritual-based vocational learning revitalization model. As a field research, a qualitative approach and spiritualization of vocational science were used in this study. The data collection techniques used participant observation, interviews, and documentation, while the analysis technique used qualitative analysis. The results of this study indicate that the ship maneuvering and control course at Polimarin has undergone a spiritualization process at the planning, implementation, and evaluation levels of learning. Spiritual aspects, especially the values of monotheism and welfare, are integrated in depth so that students understand spiritual responsibility in making professional decisions, as well as the importance of maintaining safety and the environment. The implementation of vocational learning at Polimarin can be used as an initial reference for the spiritualization model of vocational learning.
Co-Authors Ahmad Umam Aufi Alimatussa'diyah, Alimatussa'diyah Arif Rakhman Suharso Ario Hendartono Dhesi Wulan Sari Erwin Sutantyo Evie Sirait Gunawan Budi Santoso Gunawan Budi Santoso Heri Kiswanto Indah Nurhidayati Juwarlan Juwarlan Juwarlan Khaeroman Kumara, Rahindra Bayu Kurniawan, Fajarsari Ngatmin Ngatmin Ngatmin Ngatmin Ngatmin, Ngatmin Noviarianto, Noviarianto Purwanto Sri Tutie Rahayu SUYONO Suyono Suyono Wahyu Ari Putranto Widar Bayu Wantoro Yulius Oscar