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PENGARUH KOMPOSISI CANGKANG KEMIRI - BARIUM KARBONAT PADA BAJA KARBON RENDAH MENGGUNAKAN METODE PACK CARBURIZING
Teknika
Vol 10
, No 2
(2025)
Proses pack carburizing merupakan metode perlakuan panas pada logam dengan cara memanaskan material hingga mencapai fasa austenit, bertujuan untuk meningkatkan sifat fisik dan mekanisnya. Penelitian ini bertujuan untuk mengkaji pengaruh variasi komposisi campuran karbon terhadap kekerasan dan struktur mikro baja. Pemanasan dilakukan menggunakan furnace pada suhu 930°C selama 4 jam. Karakterisasi dilakukan melalui Scanning Electron Microscopy – Energy Dispersive X-ray (SEM–EDX), uji kekerasan Vic...
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Secure Visual Image Encryption Using Lorenz Chaos, Steganography, and Wavelet-Based Steganography Authentication
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
Medical images play a vital role in diagnosis and clinical decision-making, yet their transmission and storage pose significant privacy and security challenges. This research proposes a visual stego-encryption system that integrates the Lorenz chaotic algorithm with Discrete Wavelet Transform (DWT) to embed both secret medical data and a doctor's digital signature into a visually meaningful encrypted image (VMEI). The system employs dual-layer embedding and role-based access control, allowing ad...
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Pengaruh Disiplin Kerja, Lingkungan Kerja, dan Komunikasi Efektif Terhadap Loyalitas Kerja Karyawan Pada PT Sentong Sultan Keraton Majapahit Kota Kediri
Jurnal Ekonomi, Bisnis dan Manajemen (EBISMEN)
Vol 4
, No 4
(2025)
This study aims to analyze the effect of work discipline, work environment, and effective communication on employee loyalty at PT. Sentong Sultan Keraton Majapahit in Kediri City. This research uses a quantitative associative approach with a survey method. The population consists of 35 employees, all of whom were selected as samples using the total sampling technique. Data were collected through questionnaires using a five-point Likert scale and analyzed using multiple linear regression with SPS...
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Synthesis of Silica Gel From Rice Husk Ash for Sustainable Air Conditioning Requirements
Syahbardia
; Berkah Fajar Tamtomo Kiono
; Sonny Handojo Winoto
; Mohamad Said Kartono Tony Suryo
; Dedi Lazuardi
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
An increase in air conditioning demand, driven by global warming and the need for comfort, highlights the importance of energy-efficient systems like desiccant cooling. This research explores using rice husk ash (RHA), an agricultural waste product from Indonesia, to synthesize silica gel for these systems. The study involved synthesizing silica gel from RHA through chemical processes and comparing its sorption capacity to commercial silica gel. Two synthesis methods were tested: a direct reacti...
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Pengaruh Work Family Conflict, Stres Kerja dan Kompensasi Terhadap Kinerja Karyawan di PT Nusa Gas Pratiwi
Jurnal Ekonomi, Bisnis dan Manajemen (EBISMEN)
Vol 4
, No 4
(2025)
This study aims to analyze the influence of work-family conflict, job stress, and compensation on employee performance at PT Nusa Gas Pratiwi. A quantitative approach with a survey method was employed, and data were collected through questionnaires distributed to 35 permanent employees. The data were analyzed using multiple linear regression with SPSS software. The results indicate that work-family conflict, job stress, and compensation have a positive and significant effect on employee performa...
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Pengaruh Konten YouTube terhadap Penerimaan Mahasiswa Baru: Studi Analisis Sentimen BERT dan Korelasi Spearman
Jurnal Informatika dan Rekayasa Perangkat Lunak
Vol 7
, No 2
(2025)
This study aims to analyze the relationship between the number of videos, views, positive comments, negative comments, and neutral comments with the number of new students at higher education institutions during 2021–2024. The data were obtained from three sources: (1) quantitative data on the number of new students from LLDIKTI, (2) data on the number of videos and views from YouTube, and (3) sentiment data from comments classified using the BERT algorithm into positive, negative, and neutral c...
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Sosialisasi Metode Tumpang Sari Pada Replanting Kelapa Sawit Untuk Meningkatkan Pendapatan Petani Sawit Rakyat
saragih, wismaroh
; Awaludin, Awaludin
; Wagino, Wagino
; Agusnu Putra, Irwan
; Kurniawan, Dedi
; Br Sijabat, Octanina Sari
Adi Widya: Jurnal Pengabdian Masyarakat
Vol 9
, No 2
(2025)
Program pengabdian kepada masyarakat bertujuan meningkatkan pendapatan petani sawit rakyat selama masa replanting dengan metode tumpang sari, untuk mengoptimalkan lahan perkebunan kelapa sawit. Penelitian ini menggunakan penyuluhan, diskusi, dan kunjungan ke kelompok tani di Desa Jaharun, Kecamatan Galang, Kabupaten Deli Serdang, Sumatera Utara. Program ini mengedukasi petani mengenai tanaman hortikultura, rempah, dan tanaman bernilai ekonomis lain yang dapat ditanam di sela kelapa sawit. Hasiln...
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Mechanical Properties of Epoxy Composite Reinforced with Spent Coffee Ground and Coffee Husk
Etanto Heiliano Wijayanto
; Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Mohd Ruzaimi Mat Rejab
; Tezara Cionita
; Wisnu Prayogo
; Deni Fajar Fitriyana
; Rozanna Dewi
; Thomas Junaedi
; Agustinus Purna Irawan
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
This study aims to investigate the effect of increasing the concentration of natural filler on the mechanical properties of Spent Coffee Ground (SCG) / Coffee Husk (CH) reinforced epoxy matrix composite. The materials used in this study are epoxy resin as a matrix and waste coffee grounds and coffee husks as natural fillers with sizes of 100-mesh and concentrations of 10, 20, and 30 wt.%. The results showed that SCG 10 wt.% produced the best mechanical properties compared to the other samples ba...
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Pengolahan Kerajinan Sampah Anorganik oleh Bank Sampah Adi Dharma untuk Meningkatkan Kesejahteraan Masyarakat yang Berbasis Kelestarian Lingkungan
Jurnal Suara Pengabdian 45
Vol 4
, No 3
(2025)
Masalah pengelolaan sampah di Kota Semarang semakin meningkat menuntut adanya solusi berbasis masyarakat. Progran Pengabdian Kepada Masyarakat berbasis kemitraan bertujuan mengoptimalkan peran Bank Sampah Adi Dharma RW 06 Kelurahan Sendangguwo dalam mengolah sampah anorganik menjadi kerajinan bernilai ekonomi. Metode yang digunakan adalah Participatory Action Research melalui tahapan sosialisasi, pelatihan produksi, pendampingan, serta penguatan manajemen usaha dan pemasaran digital. Hasil pe...
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Mechanical Performance of Epoxy Composite Reinforced with Wood Dust and Crumb Rubber Waste
Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Cionita, Tezara
; Fitriyana, Deni Fajar
; Anis, Samsudin
; Dewi, Rozanna
; Junaedi, Thomas
; Wijayanto, Etanto Heiliano
; Prayogo, Wisnu
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
The incorporation of wood dust and crumb rubber waste as filler in polymer matrix composite still requires in-depth evaluation of mechanical properties because they have different characteristics. This study evaluates the tensile, flexural, and hardness properties of epoxy composites reinforced with various fractions of wood dust and crumb rubber (5, 10, and 15%). The results showed that the composite with 5% crumb rubber produced the highest tensile strength of 15.52 MPa (CR5), while the highes...
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