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All Journal CALYPTRA : Jurnal Ilmiah Mahasiswa Universitas Surabaya Eksergi: Chemical Engineering Journal JITK (Jurnal Ilmu Pengetahuan dan Komputer) Management Studies and Entrepreneurship Journal (MSEJ)
Ivan Sebastian
Universitas Surabaya
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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NEVER BE AFRAID HUBUNGAN ANTARA FEAR OF FAILURE DAN PROKRASTINASI AKADEMIK Sebastian, Ivan
CALYPTRA : Jurnal Ilmiah Mahasiswa Universitas Surabaya Vol 2, No 1 (2013): CALYPTRA : Jurnal Ilmiah Mahasiswa Universitas Surabaya
Publisher : University of Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Prokrastinasi merupakan kecenderungan seseorang untuk menunda kegiatannya sampai pada saat-saat terakhir (Gafni & Geri 2010). Seseorang dengan kecemasan tinggi cenderung menunda pekerjaan mereka dengan alasan yang irasional (Steel, 2007). Fear of failure merupakan kecemasan atau kekhawatiran yang irasional yang akhirnya menurunkan kepercayaan diri untuk mengerjakan suatu tugas. Subjek penelitian ini adalah mahasiswa fakultas psikologi UBAYA yang mengambil mata kuliah PAU. Jumlah subjek adalah 131 mahasiswa. Pengukuran prokrastinasi akademik dilakukan dengan Pure Procrastination Scale (PPS) yang mengukur prokrastinasi yang diakibatkan oleh irrational belief. Pengukuran fear of failure dilakukan menggunakan dua angket. Pertama yaitu PFAI yang dibuat oleh Conroy (2002) fear of failure secara umum. Kedua yaitu AAT yang terdiri dari dua subskala yang mengukur tentang kecemasan akademik yang digunakan sebagai pembanding. Hasil dari korelasi data yang ada menunjukkan adanya hubungan yang signifikan antara fear of failure dengan prokrastinasi (r = 0,339: p = 0,000).
DECISION SUPPORT SYSTEM FEASIBILITY OF GRANTING RECEIVABLES ON GOODS EXPORT SERVICES IN FREIGHT FORWARDING COMPANY WITH PROFILE MATCHING METHOD sebastian, Ivan; Jumaryadi, Yuwan; Kusumawardani, Ratna; Setiawan, Bayu
JITK (Jurnal Ilmu Pengetahuan dan Teknologi Komputer) Vol 7 No 1 (2021): JITK Issue August 2021
Publisher : LPPM Nusa Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1202.443 KB) | DOI: 10.33480/jitk.v7i1.1644

Abstract

Decision Support System (DSS) is a system that is able to provide problem solving skills in both semi-structured and unstructured ways. The company's role in the import-export business is very important because it can meet the needs of people who have been doing business in the trade sector, both domestic trade and international trade. Indonesia as a country with a high volume of international trade requires a transportation service company that can support goods export activities by providing payment facilities with a certain time period. The problem that occurs is that there are customers who experience congestion in payment of receivables. This is because there is no standardized procedure in determining the granting of receivables so that it is difficult to determine the feasibility of granting receivables to customers. Therefore, researchers will conduct research on a decision support system with the profile matching method to determine the feasibility of granting receivables to goods export services by applying the 5C principle so that decision makers do not use intuition again and have methods or standardized procedures in providing receivables to customers. This research is expected to help determine the feasibility of receivables by applying the 5C principle, it is hoped that it can help decision makers in making decisions about giving credit to customers.
Pengaruh Gaya Kepemimpinan Transformasional Dan Motivasi Kerja Terhadap Komitmen Organisasi Pada PT. East Infinita Indonesia Duri Sebastian, Ivan; Andri, Seno
Management Studies and Entrepreneurship Journal (MSEJ) Vol. 5 No. 2 (2024): Management Studies and Entrepreneurship Journal (MSEJ)
Publisher : Yayasan Pendidikan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/msej.v5i2.5098

Abstract

Tujuan penelitian ini adalah untuk mengetahui dan menganalisis pengaruh gaya kepemimpinan transformasional dan motivasi kerja terhadap komitmen organisasi pada karyawan PT. East Infinita Indonesia Duri. Penelitian ini memiliki 72 responden yang merupakan total karyawan pada PT. East Infinita Indonesia Duri. Penelitian ini menggunakan teknik pengambilan Sampel Sensus atau Sampling Total. Penelitian ini menggunakan uji validitas, uji reliabilitas, uji normalitas, uji multikolinearitas, uji heteroskedastisitas, regresi linear berganda, uji t, uji F, dan uji koefisien determinasi (R2). Hasil dari penelitian ini menunjukkan bahwa gaya kepemimpinan transformasional dan motivasi kerja berpengaruh signifikan fan positif terhadap komitmen organisasi pada karyawan PT East Infinita Indonesia Duri.
The Effect of Ammonium Sulfate Concentrations on The Size Distributions of NPK-Fertilizer Granules in a Rotating Drum Granulator Hardhianti, Meiga Putri Wahyu; Sebastian, Ivan; Wiratni
Eksergi Vol 22 No 2 (2025)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i2.14256

Abstract

The granulation process is important in pharmaceuticals, detergents, and fertilizers. It consists of enlarging the particle size to create granules with specific properties. This study examined the wet granulation process for NPK fertilizers and investigated the effect of binder solutions, particularly ammonium sulfate (ZA) concentrations, on the distribution of granule sizes. The granulation process was conducted in a rotating drum granulator with varied NPK ratios (28-6-6, 20-20-8, 18-16-20, and 15-15-15) with amounts of binder (10 ml or 20 ml of 15% ZA solution or pure water). Granule sizes were analyzed using Image Pro Plus software, and Stoke’s number was calculated to establish a correlation between the average granule radius and Stoke’s number. The results showed that ammonium sulfate improved granulation, leading to larger granule size and more consistent size distribution in various NPK formulations than water-bond granules. Furthermore, a higher liquid-to-solid ratio generally increases granule size, resulting in a broader size distribution. The study demonstrated a robust correlation (R² = 0.95) between Stoke's number and the average granule radius, indicating that Stoke's number served as a generalized parameter of the granulation process for various NPK formulations and binder types.
Co-Authors Bayu Setiawan Hardhianti, Meiga Putri Wahyu Jumaryadi, Yuwan Ratna Kusumawardani, Ratna Seno Andri Wiratni