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All Journal Mechatronics, Electrical Power, and Vehicular Technology Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Mahasiswa FEB Ketenagalistrikan dan Energi Terbarukan Teknomekanik Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Sukma Aditya
Universitas Sumatera Utara
Aerospace Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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"STUDI EMPIRIS PENGARUH KECERDASAN EMOSIONAL, PERILAKU BELAJAR, DAN STRES KULIAH TERHADAP KETERLAMBATAN PENYELESAIAN STUDI (Studi pada Mahasiswa S1 Akuntansi Universitas Brawijaya Malang)" Sukma, Aditya; Adam, Helmy
Jurnal Ilmiah Mahasiswa FEB Vol. 1 No. 2
Publisher : Fakultas Ekonomi dan Bisnis Universitas Brawijaya

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh kecerdasan emosional, perilaku belajar, dan stress kuliah terhadap keterlambatan penyelesaian studi (Studi pada Mahasiswa Jurusan Akuntansi Universitas Brawijaya Malang). Penelitian ini merupakan Penelitian ini mengembangkan penelitian sebelumnya yang dilakukan oleh Suryaningsum, dkk.(2008), Suryaningsum, dkk.(2005) dan Suryaningsum dan Trisniwati (2003). Penelitian ini berbeda dari ketiga penelitian sebelumnya dengan memasukkan variabel lama  masa studi mahasiswa sebagai variabel dependen.  Penelitian ini dimaksudkan untuk mencari jawaban atas fenomena lama penyelesaian masa studi dan keterkaitannya dengan variabel kecerdasan emosional, perilaku belajar, dan tingkat stres mahasiswa akuntansi di perguruan tinggi. Penelitian ini dilaksanakan di Jurusan Akuntansi Universitas Brawijaya Malang. Populasi penelitian ini adalah mahasiswa Jurusan Akuntansi Universitas Brawijaya Malang, angkatan 2006, 2007, dan 2008 atau dengan kata lain  yang telah menempuh masa studi lebih dari 4 tahun (8 semester). Teknik pengambilan sampel menggunakan  purposive sampling. Data penelitian diperoleh melalui kuesioner. Penelitian ini dilakukan dengan menggunakan analisis regresi linear berganda sebagai satu model analisis.Hasil penelitian menunjukkan bahwa variabel perilaku belajar dan stress kuliah berpengaruh signifikan terhadap keterlambatan penyelesaian studi, sedangkan variabel kecerdasan emosional tidak berpengaruh secara signifikan.   Kata kunci : perilaku belajar, kecerdasan emosional, stres kuliah, keterlambatan penyelesaian studi.
Uniaxial and biaxial hot pressing of PVDF films: A pathway toward high-performance piezoelectric sensors and energy harvesters Suprapto, Suprapto; jubaidah, Jubaidah; Triono, Selamat; Gunawan, Harianto; Lisyanto, Lisyanto; Nugraha, Aditya Sukma; Aldori, Yopan rahmad
Teknomekanik Vol. 9 No. 1 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v9i1.44972

Abstract

The piezoelectric efficiency of Poly (vinylidene fluoride) (PVDF) membranes becomes restricted by the challenge of generating and stabilizing electroactive β-phase during processing. Stretching requires control of deformation parameter, while solvent-based methods bring environmental and occupational health risks. This research suggests hot-pressing as an alternative method for enhancing β-phase fraction, utilizing multidirectional stress without solvent or chemical exposure. This study systematically compares uniaxial hot-pressing (Uniaxial HP) and biaxial hot-pressing (Biaxial HP) setups to determine which stress distribution is more effective at promoting changes and improving piezoelectric properties in PVDF membranes. The main objective of this research is to systematically evaluate and compare the impacts of uniaxial and biaxial hot-pressing on the crystalline phase transformation and electromechanical performance, including the piezoelectric coefficient (d33) and output voltage response of PVDF membranes. PVDF pellets were hot-pressed at 220o C under a pressure of 60 MPa for 15 minutes followed by rapid quenching in ice water. X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) confirmed phase composition, correlated with performance via the piezoelectric coefficient (d33), and assessed piezoelectric activity. Experimental results show that biaxial loading provides a higher b-phase fraction (50.47%) compared to untreated membranes (47.80%) and UHP samples (49.30%). The crystallinity and the piezoelectric coefficient also increased to 49% and 18.8 pC/N, respectively. Biaxial stress pattern during hot-pressing induces favourable thermodynamic and kinetic conditions for b-phase expansion. Beyond phase-related results, the approach delivers competitive piezoelectric effectiveness while maintaining simplicity and reducing solvent-dependent processing steps.
Co-Authors A.A. Ketut Agung Cahyawan W Akbar, Musthafa Anwar Muqorobin Arif Santoso Bagus Budiwantoro Baskoro, Catur Hilman Adritya Haryo Bhakti Budi Azhari Dodi Sofyan Arief, Dodi Sofyan Edwar Yazid Estiko Rijanto Gunawan, Harianto Helmy Adam Hendri Maja Saputra Hikmawan, Muhammad Fathul Jubaidah, Jubaidah Lisyanto . Midriem Mirdanies Muflihana, Afdila Muhammad Kasim Pakha, Aji Nasirohman Pudji Irasari Rahmat Rahmat Ramadiansyah, Mohamad Luthfi Rizqi Andry Ardiansyah Roni Permana Saputra Selamat Triono, Selamat Suprapto Suprapto Vita Susanti Yopan Rahmad Aldori Zulkarnain Zulkarnain