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Prediction of Soil Nutrients from Different Soil Textures using Portable Spectrometer and Machine Learning
Himawan, Harki
; Nainggolan, Rut Juniar
; Rakhmadi, Handono
; Djoyowasito, Gunomo
; Ubaidillah
; Nopriani, Lenny Sri
; Al Riza, Dimas Firmanda
Advance Sustainable Science, Engineering and Technology
Vol 8
, No 1
(2025)
Soil nutrients, such as nitrogen, phosphorus, and potassium, are critical for plant growth and agricultural productivity. Conventional laboratory methods for measuring these nutrients are accurate but often time-consuming, costly, and environmentally taxing. This study explores the potential of portable visible-near infrared (Vis-NIR) spectrometer combined with machine learning algorithms as a rapid, cost-effective, and eco-friendly alternative for soil nutrient analysis. Soil samples of clay, c...
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Influence of Mixing Time on the Hardness and Structure of Local Clay-Based Crucibles
Rusiyanto
; Rifky Ismail
; Athanasius Priharyoto Bayuseno
; Daffa Agya Mahardika
; Fitriyana, Deni Fajar
; Wirawan Sumbodo
; Aldias Bahatmaka
Advance Sustainable Science, Engineering and Technology
Vol 8
, No 1
(2025)
Although clay crucibles are frequently utilized in regional industries, their inadequate mechanical strength often causes durability issues. This study investigates the influence of mixing duration on the Vickers hardness and macrostructure of crucibles composed of local clay, kaolin, and molasses. The composition was made up of 47.5% clay, 47.5% kaolin, and 5% molasses as a binder, with 15% water added relative to the total weight. Durations of 15, 30, and 45 minutes were evaluated to determine...
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Uncertainty-Quantified Grid-Convergence Analysis of RANS Turbulence Models for 2-D Incompressible Backward-Facing Step Flow in OpenFOAM
Kaiway, Mickael Ruben
; Joni
; Giai, Agustinus
; Siregar, Samuel Parlindungan
; Tambing, Enos
; Pius, Obia
Advance Sustainable Science, Engineering and Technology
Vol 8
, No 1
(2025)
A concise evaluation of Reynolds-Averaged Navier–Stokes (RANS) turbulence modeling for two-dimensional, incompressible, steady backward-facing step (BFS) flow at Re = 1000–3000 was conducted using OpenFOAM’s SimpleFoam solver with the standard k–ε model. A tri-level mesh enhancement (coarse, medium and fine) was implemented, and ambiguity was measured utilizing the Convergence Ratio (CR) and Grid Convergence Index (GCI). The fine grid (CR = 0.54; GCI = 0.0059%) was the only configuration exhibit...
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Transformasi Pelayanan Publik Menuju Smart Governance di Era Digital Studi pada Pemerintah Daerah Kota Surabaya
Sinar Dunia: Jurnal Riset Sosial Humaniora dan Ilmu Pendidikan
Vol 4
, No 4
(2025)
This study explores the digital transformation journey of Surabaya City Government toward Smart Governance as part of its broader Smart City initiative. The city has demonstrated a strong commitment to leveraging digital technology to enhance public service quality, evidenced by innovative platforms such as the Surabaya Single Window, SIMPATIK, and E-Health services. These initiatives aim to accelerate service delivery, increase operational efficiency, and facilitate data-driven decision-making,...
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Implementasi Sistem Hidroponik Deep-Flow-Technique (DFT) untuk Pemanfaatan Pekarangan di Desa Mekar Jaya
Badu, Risti Ristianingsih
; Ijonu, Ukhti Nurfajriah Sasmita
; Lukum, Wahidin
; Paputungan, Nursiti Aisyah
; Ajami, Frans Mitran
; Abas, Mamat
; Podungge, Abdul Madjid
; Sahabat, Andi Inar
; Juramang, Risnayanti R.
; Umadji, Nur Inda R.
; Radjak, Karmila Damariani
Jurnal Suara Pengabdian 45
Vol 4
, No 4
(2025)
The utilization of home yard as an alternative food source by using innovation has not been well applied in Melandar Meiland village. Household food security is usually not managed planned. To achieve sustainable use of the yard, this devotion aims to implement the Deep Flow Technique (DFT) hydroponic system. Moreover, the method used in this activity is participation through the observation of initial conditions, socialization and education through extension and discussion, the application of h...
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Edukasi Bijak Memilih: Pengenalan Konsep Kebutuhan dan Keinginan Pada Siswa Sekolah Dasar di SDN 032 Tarakan
Hidayat, Nurul
; Kasmin, Ichelia
; Arismawati H, Sindi
; Maria, Jumi
; Seda, Fansiskus
; Khairunnisa, Khairunnisa
; Naila, Juwita
; Berianti, Gustini
; Peren, Uliperdi
Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia
Vol 4
, No 2
(2025)
This Community Service activity reflects university students' social concern for their environment, particularly in elementary education. The activity was conducted at SDN 032 Tarakan to provide students with an understanding of the differences between needs and wants. The method used was face-to-face socialization, interactively designed through simple material delivery, ice-breaking, and an image classification game. The results showed high student enthusiasm and their ability to correctly cla...
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Characteristics of red sorgum flour ice cream cones (Sorghum bicolor L) and seaweed puree (Eucheuma cottonii): Karakteristik cone es krim tepung sorgum merah (Sorghum bicolor L) dan puree rumput laut (Eucheuma cottonii)
Agrobioteknologi
Vol 2
, No 2
(2025)
Cone is a type of biscuit in wafer qualification that is cone-shaped and used as an ice cream holder. Cone is usually made from wheat flour with the addition of other ingredients as supporting ingredients. Research on making ice cream cones is still rarely done, especially making ice cream cones using red sorghum flour and Eucheuma cottonii puree. This study aims to determine the chemical, physical, and organoleptic characteristics of ice cream cones that are high in fiber and protein, and prefe...
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Pertanggungjawaban Pejabat Pembuat Akta Tanah Dalam Dugaan Perbuatan Melawan Hukum Terkait Pengurusan Balik Nama Sertifikat (Studi Putusan Putusan Mahkamah Agung Nomor 175 K/Pdt/2021)
Jurnal Penelitian Serambi Hukum
Vol 19
, No 01
(2025)
Notaries/PPAT play an important role in ensuring legal certainty in land rights transfers through the creation of authentic deeds and certificate transfer procedures. However, their position is often questioned when obstacles arise in the land administration process. This study examines the responsibility of Notaries/PPATs in the case of Supreme Court Decision No. 175 K/Pdt/2021, in which the PPAT was accused of committing an unlawful act. Using normative juridical and qualitative analysis metho...
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Analisis Pengendalian Kualitas Produksi Menggunakan Metode Statistical Quality Control (SQC) Pada Pabrik Gula ABC
Jurnal Ekonomi, Bisnis dan Manajemen (EBISMEN)
Vol 5
, No 1
(2025)
This study aims to analyze the quality control of white crystal sugar production at ABC Sugar Factory using the Statistical Quality Control (SQC) method. The research employed a descriptive quantitative approach with a case study design. The primary data consisted of production volume and defective product data during the 2024 production period, while supporting data were obtained through observation and interviews with the Quality Control department. The analytical tools applied included check...
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Pengaruh Service Quality, Store Atmosphere, dan Word of Mouth Terhadap Repurchase Intention di Batik Lochatara Kediri
Populer: Jurnal Penelitian Mahasiswa
Vol 4
, No 2
(2025)
This study aims to analyze the effect of service quality, store atmosphere, and word of mouth on repurchase intention of Batik Lochatara Kediri consumers. This research employs a quantitative approach with a causal associative design. Data were collected through questionnaires distributed to 96 respondents who are customers of Batik Lochatara Kediri, selected using accidental sampling. The research instrument was measured using a five-point Likert scale. Data analysis was conducted using multipl...
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