Articles
Characterization fine grained low alloy steel 22 NiMoCr 3 7 by magnetic Barkhausen noise analysis
Isnan, May;
Kusuma, Gilang Cempaka;
Hamdani, Hamdani;
Sudasri, Imam;
Kurnia, Asep;
Rafi, Hanif Muzhaffar;
Putra, Andhika
International Journal of Advances in Applied Sciences Vol 14, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science
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DOI: 10.11591/ijaas.v14.i1.pp209-217
To ensure the quality of mass-produced products, non-destructive material testing (NDT) is required with a method that has high testing speed and accuracy. Products that have undergone heat treatment such as automotive components to obtain a specific hardness value need to be tested to ensure the desired quality. Some parameters such as coercivity and permeability of the ferromagnetic materials, can be used to characterize the shape of the hysteresis curve. The hysteresis curve geometry is related to mechanical hardness, hot working record, and the presence of residual stresses. This paper will present how the coercivity value measurement can be done using the Barkhausen effect, as well as a study of the correlation between the coercivity value and the hardness of a ferromagnetic material using the regression analysis method. Indentation testing has also been done to verify different approaches to obtain hardness value by Barkhausen noise analysis. The research shows that this technique was sufficiently accurate with superior rapid testing and no indentation mark.
CRTP: learning model for integrating STEM competencies in pre-service biology teachers
Marlina, Reni;
Suwono, Hadi;
Ibrohim, Ibrohim;
Yuenyong, Chokchai;
Hamdani, Hamdani;
Pamungkas, Rahmania
Journal of Education and Learning (EduLearn) Vol 19, No 3: August 2025
Publisher : Intelektual Pustaka Media Utama
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DOI: 10.11591/edulearn.v19i3.21818
The development of education shows the importance of integrating science, technology, engineering, and mathematics (STEM) in schools and preparing teachers who are ready to implement STEM in the classroom. This study aims to describe prospective teachers' perceptions of STEM competencies through the collaborative reflective teaching practice (CRTP) model in micro teaching courses. The method used was qualitative using interview assessment and questionnaire of STEM perception. This study used an experimental design conducted with 3 activities (initial test, teaching practice, and final test). The initial test and final test used a STEM perception questionnaire. Teaching practice in the form of applying the CRTP model which consists of 4 stages, namely plan, simulation, implementation, and reflection. The results of the study describe that STEM competencies develop well with the CRTP model. The questionnaire results showed that 96.2% of respondents strongly agreed that the CRTP model had proven valid for developing STEM competencies of prospective biology teachers. This research contributes to educators who prioritize meaningful learning experiences for prospective biology teachers. The authors suggest that effective STEM competencies should incorporate five main components: i) reflection, ii) collaboration, iii) integration of interdependent STEM disciplines, iv) skills related to STEM disciplines, and v) integrative STEM teaching and learning.
Implementasi Project-Based Learning Pada Mata Pelajaran Instalasi Motor Listrik
Saputra, Ferdi Jansen;
Hamdani, Hamdani
Jurnal Pendidikan Teknik Elektro Vol 6 No 1 (2025): Jurnal Pendidikan Teknik Elektro
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang
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DOI: 10.24036/jpte.v6i1.515
Education plays an important role in the overall development of individual potential, as stipulated in the Law of the Republic of Indonesia Number 20 of 2003 concerning the National Education System. At the Vocational High School (SMK) level, education is oriented towards developing students' professional competencies following their fields. One of the subjects at SMK Negeri 2 Payakumbuh, especially in the Electrical Power Installation Engineering department, is Electric Motor Installation which involves theory and practice. However, observations show that learning tends to be passive, so students lack creativity and do not understand the material. This research aims to overcome these problems by applying the Project-Based Learning (PjBL) learning model. PjBL is an approach that involves students in designing and completing real projects, which aims to improve critical thinking skills, creativity, and collaboration. The method used in this research is a quantitative approach with a type of pre-experimental research, the pre-experimental research design used is One Shot Case Study. This design involves one group where the practicum value before the application of the Project-Based Learning model (O1), given treatment (X), and the practicum value after the application of the Project-Based Learning model (O2). The subjects of this study were students of class XI TITL 2 SMK Negeri 2 Payakumbuh in the 2024/2025 academic year
OBSERVASI DAERAH PENANGKAPAN IKAN DI PERAIRAN LAUT JAWA DAN SELAT MAKASSAR
Larasati, Rakhma Fitria;
Jaya, Made Mahendra;
Mahardi, I Gusti Ngurah Kadek Hary;
Putra, Angkasa;
Bramana, Aditya;
Aini, Sarifah;
Hamdani, Hamdani;
Ariana, Made
Jurnal Teknologi Perikanan dan Kelautan Vol 15 No 2 (2024): JUNI 2024
Publisher : Fakultas Perikanan dan Ilmu Kelautan, IPB University
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DOI: 10.24319/jtpk.15.203-210
Daerah penangkapan ikan di perairan Laut Jawa dan Selat Makassar merupakan daerah tangkapan yang penting bagi nelayan. Tujuan dari penelitian ini adalah untuk menganalisis proses penentuan Daerah Penangkapan Ikan (DPI), menjelaskan hasil observasi suhu dan salinitas perairan di setiap DPI yang telah ditentukan, serta mengidentifikasi jenis hasil tangkapan, dengan menggunakan Kapal Motor (KM) Tirta Putra Kencana I (alat tangkap purse seine). Penelitian ini dilakukan di perairan Laut Jawa dan di Selat Makasar, mulai dari bulan Desember tahun 2022 hingga bulan April 2023. Metode penelitian yang digunakan adalah observasi langsung dan dianalisis menggunakan analisis deskriptif. Data primer diperoleh melalui observasi langsung di lapangan, termasuk kegiatan penentuan DPI dan pengukuran suhu, serta salinitas di setiap lokasi DPI. Penentuan DPI dilakukan dengan mempertimbangkan beberapa syarat, seperti wilayah perizinan penangkapan ikan, ketidakgangguan terhadap pelayaran niaga, kondisi perairan yang aman, dan minim pengaruh cuaca buruk pada daerah tersebut. Hasil pengukuran suhu dan salinitas menunjukkan bahwa rata-rata perairan Laut Jawa dan Selat Makassar memiliki karakteristik yang serupa. Namun, DPI yang berdekatan dengan daratan menunjukkan suhu yang lebih rendah dan kadar salinitas yang lebih tinggi. Jenis hasil tangkapan didominasi oleh ikan layang (Decapterus macrosoma dan Decapterus russelli) yang mendiami perairan laut lepas, diikuti oleh ikan siro (Sardinella sp.) yang ditemui di wilayah pantai. Komoditas ikan pelagis besar lebih cenderung tertangkap di wilayah penangkapan di sebelah barat.
SOSIALISASI PENCEGAHAN DAN PENANGGULANGAN DAMPAK COVID-19 DI KELURAHAN BABAT JERAWAT PAKAL KOTA SURABAYA
Nurhayati, Faridha;
Wahjuni, Endang Sri;
Febriyanti, Irma;
Kuncoro, Bambang Ferianto Tjahyo;
Hamdani, Hamdani;
Kaharina, Arifah
JURNAL WIDYA LAKSANA Vol 11 No 1 (2022)
Publisher : Universitas Pendidikan Ganesha
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AbstrakProgram pengabdian kepada masyarakat ini bertujuan untuk memberikan sosialisasi dan meningkatkan kepedulian dalam upaya pencegahan dan penanggulangan dampak akibat covid-19 di Kota Surabaya, melalui penyuluhan terkait bagaimana upaya pencegahan covid-19 di lingkungan keluarga dan pembagian sembako kepada warga Babat Jerawat Pakal Kota Surabaya. Keberlanjutan dari program ini adalah warga dapat menerapkan pola pencegahan covid-19 melalui gerakan 3 M (memakai masker, mencuci tangan dan menjaga jarak) serta pembagian sembako dapat membantu memenuhi kebutuhan pokok. Pelaksanaan program pengabdian kepada masyarakat dilakukan di balai RW XI kelurahan Babat Jerawat Kecamatan Pakal Surabaya pada warga yang terdampak Covid-19 sebanyak 60 orang. Berdasarkan hasil kegiatan dapat disimpulkan bahwa warga memberikan respon positif dan antusias dengan kegiatan yang dilaksanakan.Kata Kunci: Covid-19, Penyuluhan, Sembako AbstractThis community service program aims to provide socialization and increase awareness in efforts to prevent and the impact of Covid-19 in the City of Surabaya, through counseling on how to prevent Covid-19 in the family environment and distribution of basic necessities to residents of Babat Jerawat village Pakal district, Surabaya city. The continuity of this program is that residents can apply the pattern of prevention of Covid-19 through the 3M movement (wearing masks, washing hands and keeping their distance) and the distribution of groceries can help meet basic needs. The community service program was carried out at the RW XI hall of the Babat Jerawat Village, Pakal District, Surabaya for 60 people affected by Covid-19. Based on the results of the activity, it can be concluded that the residents responded positively and were enthusiastic about the activities carried out
PENGARUH UKURAN PERUSAHAAN, LEVERAGE, ECONOMIC VALUE ADDED DAN RETURN ON INVESTMENT TERHADAP RETURN SAHAM
Noramita, Noramita;
Hesty Ervianni Zulaecha;
Hamdani, Hamdani;
Seleman Hardy Yahawi
Jurnal Mahasiswa Manajemen dan Akuntansi Vol. 1 No. 2 (2022): Oktober : Jurnal Mahasiswa Manajemen dan Akuntansi
Publisher : Fakultas Ekonomi Universitas 45 Surabaya
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DOI: 10.30640/jumma45.v1i2.324
The purpose of this study was to determine the effect of company size, leverage, economic value added and return on investment on stock returns in food and beverage companies listed on the Indonesia Stock Exchange (BEI). The research time periodused is 8 years, namely the 2014-2021 period. The study population includes food and beverage companies listed on the Indonesia Stock Exchange (BEI) for the 2014-2021 period. The sampling technique was using purposive sampling technique. Based on the predetermined criteria, 9 companies were obtained. The type of data used si secondary data obtained from the Indonesia Stock Exchange website and the official website of the sample companies. The analysis method used is panel data regression analysis. The results showed that company size had no effect on stock returns, Leverage had a positive effect on stock returns, Economic value added had no effect on stock returns, and Return on investment had an effect on stock returns.
Pengembangan Multimedia Interaktif Berbantuan ISpring Suite dengan Model PBL untuk Meningkatkan Hasil Belajar Fisika Peserta Didik di SMA
Piyona, Piyona;
Haratua Tiur Maria;
Hamdani, Hamdani
JURNAL PENDIDIKAN MIPA Vol 15 No 1 (2025): JURNAL PENDIDIKAN MIPA
Publisher : Pusat Publikasi Ilmiah, STKIP Taman Siswa Bima
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DOI: 10.37630/jpm.v15i1.2431
Kurangnya media pembelajaran dalam beberapa jenjang pendidikan mendorong pendidik untuk mengembangakan multimedia interaktif guna meningkatkan hasil belajar peserta didik. Penelitian ini bertujuan untuk menghasilkan multimedia interaktif berbantuan iSpring suite dengan model PBL yang valid dan dapat meningkatkan hasil belajar peserta didik pada materi fluida statis. Penelitian ini menggunakan metode penelitian dan pengembangan (R&D) dengan menerapkan model 4D yang terdiri dari define, design, develop dan disseminate. Instrumen penelitian ini terdiri dari multimedia inteaktif dan instrumen tes. Data dikumpulkan melalui validasi ahli, uji coba, dan respons peserta didik. Hasil validasi menunjukkan bahwa multimedia interaktif berbantuan iSpring Suite layak digunakan, dengan skor validasi materi sebesar 0,73 (kategori tinggi) dan validasi media sebesar 0,84 (kategori sangat tinggi). Berdasarkan respons peserta didik, multimedia ini mendapatkan persentase total sebesar 90,5% pada uji coba kelompok terbatas dan 87,9% pada uji coba lapangan, keduanya dalam kategori sangat tinggi. Terdapat Peningkatan hasil belajar peserta didik terlihat dari nilai pretest dan posttest yang dianalisis menggunakan Wilcoxon Sign Rank Test dengan nilai -4.794 dan Asymp. Sig. <0,005. Dengan demikian, multimedia interaktif berbantuan iSpring Suite dengan model PBL pada materi fluida statis terbukti valid dan layak digunakan untuk meningkatkan hasil belajar peserta didik.
Bimbingan teknis administrasi SKP elektronik bagi dosen di lingkungan jurusan PMIPA FKIP Untan
Ningsih, Kurnia;
Afandi, Afandi;
Panjaitan, Ruqiah Ganda Putri;
Fitriawan, Dona;
Mirza, Ade;
Yani T., Ahmad;
Oktavianty, Erwina;
Hamdani, Hamdani;
Ulfah, Maria;
Masriani, Masriani
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 8, No 4 (2024): December
Publisher : Universitas Muhammadiyah Mataram
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DOI: 10.31764/jpmb.v8i4.27332
AbstrakTujuan dari bimbingan teknis ini adalah mempersiapkan semua pemangku kepentingan yang terlibat dalam kegiatan administrasi dosen tersebut untuk mempersiapkan pelatihan dan sosialisasi. Persiapan yang dilakukan adalah sebagai berikut: 1) pemadanan semua akun dosen di lingkungan jurusan pmipa; 2) pelaksanaan berbagai sosialisasi, pelatihan, dan workshop kegiatan-kegiatan tersebut. Narasumber untuk kegiatan di bulan September dilaksanakan oleh dua orang pegawai dari kepegawaian untan yaitu bapak Sugeng dan bapak Wawan yang ahli dalam bidang keadministrasian selama 2 hari yaitu Hari Jum’at dan Sabtu tanggal 6 dan 7 September 2024. Tempat kegiatan selama beberapa kegiatan tersebut di Aula FKIP, Ruang Sidang 1 FKIP Untan serta Zoom Meeting. Peserta yang dimaksud adalah: 1) semua dosen di seluruh lingkungan jurusan PMIPA; 2) semua tenaga kependidikan; 3) mahasiswa yang terlibat langsung di himpunan di setiap prodi yang jumlahnya 65 orang. Hasil yang dicapai dalam kegiatan pengabdian ini adalah: 1) Pelatihan berkelanjutan terkait Administrasi Dosen yang sangat diperlukan bagi dosen di Jurusan PMIPA FKIP; 2) Artikel publikasi ke jurnal nasional terakreditasi; 3) Produk berupa Data SKP Elektronik dan data penting lainnya yang sesuai kebutuhan dosen. Kegiatan untuk mengevaluasi kegiatan ini dilakukan dengan merumuskan hasil diskusi awal tentang proses pelaksanaan pendampingan dengan model bimbingan teknis sejenis yang pernah diikuti atau dilakukan oleh peserta sebelum mengikuti kegiatan pengabdian ini. Dari kegiatan pertama dan kedua dianalisis perubahan yang terjadi setelah para peserta mengikuti kegiatan pendampingan dengan model bimbingan teknis. Hasil akhir kegiatan pengabdian tersebut adalah terbentuknya SOP dan eSKP serta data lainnya sesuai dengan kebutuhan Dosen di Lingkungan Jurusan PMIPA Untan. Kata kunci: bimbingan teknis; administasi dosen; sasaran kinerja pegawai. AbstractThe purpose of this technical guidance is to prepare all stakeholders involved in the lecturer's administrative activities to prepare for training and socialization. The preparations made are as follows: 1) matching all lecturer accounts within the pmipa department; 2) implementation of various socialization, training, and workshops on these activities. Resource persons for activities in September were carried out by two employees from the staffing of untan, namely Mr. Sugeng and Mr. Wawan who are experts in the field of administration for 2 days, namely Friday and Saturday, September 6 and 7, 2024. The place of activity for some of these activities is in the FETT Hall, Session Room 1 FKIP Untan and Zoom Meeting. The intended participants are: 1) all lecturers in the entire PMIPA department environment; 2) all educational staff; 3) students who are directly involved in the association in each study program, totaling 65 people. The results achieved in this service activity are: 1) Continuous training related to Lecturer Administration which is very necessary for lecturers in the FETT PMIPA Department; 2) Publication articles to accredited national journals; 3) Products in the form of Electronic SKP Data and other important data according to the needs of lecturers. Activities to evaluate this activity were carried out by formulating the results of initial discussions about the process of implementing assistance with similar technical guidance models that had been followed or carried out by participants before participating in this service activity. From the first and second activities, the changes that occurred after the participants participated in the mentoring activities with the technical guidance model were analyzed. The final result of this service activity is the formation of SOPs and eSKP and other data according to the needs of Lecturers in the PMIPA Department of Untan. Keywords: technical assistance; lecturer administration; employee performance targets.
Pengaruh Likuiditas, Leverage, dan Konservatisme Akuntansi Terhadap Kualitas Laba
Ersa Amanda Maulida;
Dirvi Surya Abbas;
Imam Hidayat;
Hamdani, Hamdani
Digital Bisnis: Jurnal Publikasi Ilmu Manajemen dan E-Commerce Vol. 1 No. 3 (2022): September : Digital Bisnis : Jurnal Publikasi Ilmu Manajemen dan E-Commerce
Publisher : Universitas 45 Surabaya
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DOI: 10.30640/digital.v1i3.375
Tujuan dari penelitian ini untuk menguji dan menganalisis pengaruh likuiditas, leverage dan konservatisme akuntansi terhadap kualitas laba. Populasi dalam penelitian ini adalah perusahaan pertambangan yang terdaftar di Bursa Efek Indonesia periode 2017-2021. Teknik pengambilan sampel dengan menggunakan teknik purposive sampling menghasilkan 45 observasi perusahaan. Teknik analisis yang digunakan yaitu analisis statistik deskriptif dan analisis statistik inferensial dengan uji interaksi moderated analysis regression sebagai analisis regresi moderasinya. Hasil pengujian hipotesis menunjukkan bahwa likuiditas dan konservatisme akuntansi tidak berpengaruh terhadap kualitas laba, serta leverage berpengaruh terhadap kualitas laba.
Qualitative Analysis of Factors Affecting Taxpayer Compliance in Paying Income Tax Article 21 on PTPN IV Regional 1 Kebun Rantau Prapat Employees
Hamdani, Hamdani;
Batubara, Chuzaimah
International Journal Of Education, Social Studies, And Management (IJESSM) Vol. 5 No. 1 (2025): The International Journal of Education, Social Studies, and Management (IJESSM)
Publisher : LPPPIPublishing
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DOI: 10.52121/ijessm.v5i1.673
This study aims to identify factors that influence employee compliance of PTPN IV Regional 1 Kebun Rantau Prapat in paying Income Tax (PPh) Article 21. The method used is descriptive qualitative research through observation and document study. The results of the study indicate that tax non-compliance is mainly caused by the lack of public understanding of their status as taxpayers and the obligation to pay taxes. Other factors that influence tax compliance include tax awareness and knowledge, socialization, sanctions, incentives, and tax audits. Increasing tax awareness can increase compliance, while lack of socialization and understanding of tax regulations has a negative impact. In addition, the implementation of appropriate tax incentives and strict supervision through sanctions and tax audits can also increase taxpayer compliance. Therefore, more intensive socialization and education efforts are needed as well as more effective tax policies to improve employee tax compliance. This study is expected to be a reference for policy makers in designing better strategies to increase state tax revenues.