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Advance Sustainable Science, Environmental Engineering and Technology (ASSET) Jl. Sidodadi Timur No.24, Karangtempel, Kec. Semarang Tim., Kota Semarang, Jawa Tengah 50232
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Advance Sustainable Science, Engineering and Technology (ASSET)
Published by Universitas PGRI Semarang
ISSN : -     EISSN : 27154211     DOI : https://doi.org/10.26877/asset
Core Subject : Science, Engineering,
Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering
Advance Sustainable Science, Engineering and Technology (ASSET) is a peer-reviewed open-access international scientific journal dedicated to the latest advancements in sciences, applied sciences and engineering, as well as relating sustainable technology. This journal aims to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of sciences, engineering, and technology. The Scope of ASSET Journal is: Biology and Application Chemistry and Application Mechanical Engineering Physics and Application Information Technology Electrical Engineering Mathematics Pharmacy Statistics
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 30 Documents
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Search results for , issue "Vol. 7 No. 2 (2025): February-April" : 30 Documents clear
Sustainable Aquaculture: The Role of Probiotic Fortification In Enhancing Catfish Growth In Biofloc Aquaponics Technology Dewi, Endah Rita Sulistya; Mufidah, Ratna; Rakhmawati, Reni; Ulfah, Maria; Khoiri, Nur; Wijaya, Angelica Tricia; Hudin, Noraine Salleh
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/y4rfps86

Abstract

Catfish (Pangasius sp.) is a freshwater fish commodity that is widely cultivated in the Indonesian fisheries sector. The aim of this research was to determine the effect of fortification of liquid probiotics bioprisma and biogan on the protein and fat of catfish meat in the biofloc aquaponics technology. The catfish used in this study was 7-8 cm in size. The research was carried out using a completely randomized design (CRD) method with 3 treatments and 3 replications, the treatments were as follows: P0 = without addition of probiotics, P1 = addition of bioprisma probiotics 0.15 mL/l,5 L of water, P2 = addition of biogan probiotics 0,15 mL/l,5 L of water. The data obtained were then processed and calculated using ANOVA at a 95% confidence interval if a significant effect was found, then continued with Duncan's further test. This study indicates that the addition of probiotic to catfish culture media can affect body protein, body fat, and water quality environmental condition (ammonia, nitrite, nitrate, DO) of catfish. The addition of probiotics in the P1 (addition of bioprisma probiotics 0,15 mL/l ,5 L of water) gave the best effect in increasing the growth of  catfish, 18,70% body protein and 8,73% body fat. The integration of biofloc with aquaponics technologies can eliminate geographical limitations and accelerate the urbanization of aquaculture.
Performance Comparison of UWB Single Balanced Schottky Diode Mixers for RF Front-End Applications in 3-10 GHz Band Shairi, Noor Azwan; Mohammed , Yahya Al-gumaei; Zakaria, Zahriladha; Maizatul Alice Meor Said; Misran, Mohamad Harris; Abdullah Mohammed, Zaghir Zobilah
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jsy73y58

Abstract

This paper compares two single balanced mixer designs for ultra-wideband  (UWB) of RF front-end at frequencies ranging from 3 to 10 GHz. The proposed mixer designs use two balun topologies for varying mixer performances. Thus, Design 1 incorporates a Coupled Line Balun and Design 2 incorporates a Branch Line Balun. Both designs make use of Skyworks' SMS7621 Schottky diodes, which have a low junction capacitance, and the Rogers RO4350B substrate, which has a dielectric constant of 3.48. The Coupled Line Balun (Design 1) offers a total length of 88 mm, whereas the Branch Line Balun (Design 2) creates a more compact structure with 48 mm. This paper's thorough analysis and measurements show each design's benefits and drawbacks in terms of circuit size and performance. The simulations and measurement results of both designs generally showed a conversion loss of less than 20 dB and LO-RF isolation of better than 50 dB.
Enhancing Pose-Based Sign Language Recognition: A Comparative Study of Preprocessing Strategies with GRU and LSTM Purbojo, Toby; Wijaya, Andreas
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/sj5scb03

Abstract

Recognizing isolated sign language gestures is difficult due to differences in body proportions and missing pose landmarks. Many current methods struggle to work well across different signers. To solve this, we propose reference-based normalization, which reduces body shape differences by separately normalizing body parts such as the full body, arms, face, and hands. We tested this method using LSTM and GRU models on two datasets: a custom American Sign Language (ASL) dataset with one amateur signer, and the public WLASL dataset with various signers. On the custom dataset, the highest accuracy (97.75%) was achieved using LSTM with normalization applied only to the full body and hands, since the signer was consistent. For the WLASL dataset, adding normalization for the arms and face improved accuracy by 3.10% for LSTM and 0.77% for GRU. The GRU model reached the best WLASL result (74.03%) with fewer parameters than other advanced models. These findings show that reference-based normalization improves sign recognition performance and has potential for real-world use, especially in recognizing signs in continuous sequences.
Prokes rematri Web-based App: Development, Testing and Construct Validation of Content to Control Undernutrition at Female Teenager as Early Prevent Stunting in Life Cycle Vilda Ana Veria Setyawati; Ari Yuniastuti; Handayani, Oktia Woro Kasmini; Farida, Eko
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/srxr3p50

Abstract

Several measurements of female teenager undernutrition risk factors have been carried out, but the data are limited and not collected well. Technology approach needed to solve at this problem. This research was conducted to develop Prokes rematri web-based app and analysis CFA and EFA as construct validity. The variables and items as content of beta version were obtained from literature reviews and in-depth interviews who stake holder stunting program as subjects. In this study we limit the science scope about public health, nutrition, and statistic. Data analysis using explanatory factor analysis (EFA) and confirmatory factor analysis (CFA). In conclusion, we had developed Prokes Rematri We-Based app and have blackbox tested. In the other hand, 40 items question as end result of construct validated by EFA and CFA. The scope of questionnaire consist of four topics, that are youth nutrition practice, community support, youth nutrition knowledge, and internal factor of youth nutrition.
Enhancing Functional Foods with Plant Extracts: A Study on Gummy Candies Containing Sungkai Leaf Extract Nurhasanah, Siti; Muhaimin; Pyopyash , Sverigenia Aprilia; Zaida; Pangawikan, Aldilla Din Pangawikan
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/tjdgyw23

Abstract

Gummy candy is a popular food product, but it is generally high in calories and low in functional content. Sungkai leaves (Peronema canescens Jack) are known to contain antioxidant compounds that have the potential to be developed as functional food ingredients. To overcome the high calorie content of gummy candy, this study developed a low-calorie gummy candy formulation with the addition of encapsulated sungkai leaf extract and a low-calorie sweetener. This study aims to determine the optimal concentration of encapsulated sungkai leaf extract that produces gummy candy with optimal physicochemical, texture, antioxidant activity, and organoleptic characteristics. The study used an experimental method with Randomized Group Design (RAK), consisting of seven treatments of sweetener combination (xylitol and sucralose) and microcapsule concentration (3-7%). The results showed that the best formulation was a combination of 75% xylitol and 3% sungkai leaf extract microcapsules. This formulation produced good antioxidant activity (total phenolics 1,843 mg GAE/g; IC₅₀ of 597.878 mg/L), favorable texture (hardness 26.12 N; chewiness 42.99 Nmm), and good consumer acceptability (overall acceptability 3.71 out of 5). In addition, the caloric value was only 2.76 kcal/g, lower than conventional candy. The implications of the results of this study indicate a great opportunity for diversification of healthy food products based on local plants, as well as encouraging the development of functional food innovations that support a healthy lifestyle and prevention of degenerative diseases through the daily diet.
Development of an Ultrasonic Surface Roughness Meter for Road Maintenance: A Prototype for IRI Measurement Utomo, Eko Wahyu; Pratikso; Siegfried
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/d057s113

Abstract

The importance of the road network in Indonesia as a vital infrastructure that connects various regions has made road maintenance a top priority in development planning. However, various challenges such as ineffective handling methods, limited experts, and minimal equipment have caused road management to not be optimal. Therefore, innovations are needed in road condition measurement, one of which is through the development of an ultrasonic sensor-based surface roughness measuring instrument as a prototype of International Roughness Index (IRI) measurement to support more accurate road maintenance evaluation and planning. The purpose of this research is to measure road roughness through IRI and pavement modulus values to improve road condition assessment.This study employs the International Roughness Index (IRI) to assess the functional condition of roads and the Pavement Modulus to evaluate the structural strength of the pavement. The IRI is measured through road surface roughness surveys using a roughness meter, with the results used to classify the severity of road damage. The IRI calculation is based on a quarter-car simulation model that utilizes vehicle dynamic parameters in response to road surface profiles, following the mathematical approach developed by Sayers, Gillespie, and Paterson (1986). The research results show that the prototype Ultrasonic Surface Roughness Meter was able to measure IRI values ranging from 4 to 8 at three different locations. These measurements fall within the "Good–Fair" classification, indicating relatively mild surface roughness. Based on these findings, the Directorate General of Highways recommends light rehabilitation and periodic maintenance, and the prototype device has the potential to serve as an effective, low-cost alternative for road condition monitoring, especially in areas with limited access to conventional IRI measurement tools.
Election Officers' Health and Safety: An Occupational Risk Analysis Nurcahyanie, Yunia Dwie; Panjaitan, Nismah; Mulyana, Olievia Prabandini; Yulianto , Muhammad Teguh
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/dxrp0s27

Abstract

General elections are vital to democracy in Indonesia, yet the occupational health and safety (K3) of Voting Organizer Group (KPPS or election officers) officers is often overlooked. This study evaluates the impact of workload on the physiological health of election officers during the 2024 General Election using an ergonomics-based approach. Data were collected from seven KPPS members at TPS 07 Cerme Kidul, Gresik, East Java, measuring blood pressure and oxygen saturation before and after election day. The Wilcoxon Signed Rank Test revealed significant increases in blood pressure (p = 0.046) and decreases in oxygen saturation (p = 0.047) post-election. Key risk factors identified include long working hours, insufficient rest, and static positions. The study recommends interventions such as work shift rotations, extended rest periods, enhanced health screenings, and ergonomic improvements at polling stations. These measures aim to improve the health and safety of election officers, contributing to safer and more sustainable elections.
Analysis of Modified Exhaust Tip Geometry on Flow Behavior and Backpressure in Car Exhaust Systems for Electricity Harvesting Martias; Wawan Purwanto; Okin Johepan Handanu; Agus Baharudin; Andrizal
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/2dw2wx35

Abstract

The efficiency of vehicle exhaust systems is critical for reducing backpressure and emissions, enhancing performance and sustainability of harvesting energy. This study investigates the effect of an additional body modification at the exhaust tip on pressure and velocity distributions using Computational Fluid Dynamics (CFD) simulations in SolidWorks. Simulations were conducted at inlet velocities of 10, 15, and 20 m/s. Results show that the modified design does not increase backpressure, with the maximum observed change being a minor reduction of 0.137% at 20 m/s. These findings confirm that the additional body can be safely integrated without adversely affecting engine performance, while also improving downstream flow uniformity. This supports its viability for use in energy harvesting systems and highlights its relevance for sustainable exhaust system development.
Kinetic and Equilibrium Study of Synthetic Dye Adsorption Using Alkali-Activated Scallop Shells as Sustainable Adsorbents Muhammad Naoval Haris; Aditya Dimas Wahyu Sasongko; Farchan Mushaf Al Ramadhani
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/2nbjnr75

Abstract

Scallop shells are abundant in Indonesia, particularly along the northern coast of Java Island in Pekalongan Regency. These shells serve as natural adsorbents for removing synthetic textile dyes from aqueous solutions due to their high mineral content, especially calcium carbonate. Adsorption experiments were conducted to evaluate the potential of scallop shells as adsorbents for removing vat dye solutions. Adsorption kinetics were analyzed using pseudo-first-order and pseudo-second-order models in both linear and non-linear forms. The results showed that the non-linear pseudo-first-order model best described the adsorption process, with a qe value of 0.98982 mg/g. Equilibrium studies using Langmuir, Freundlich, and Jovanovic isotherm models indicated that the linear Freundlich model provided the best fit, with an R² of 0.99969, suggesting a heterogeneous adsorption process. These findings confirm that scallop shells are effective and eco-friendly adsorbents for textile dye removal and hold promise for sustainable water treatment. Further studies are suggested under real industrial conditions.
Performance Evaluation of Seawater-Mixed Mortar under Carbonation Exposure for Sustainable Repair Applications Pinta Astuti; Adinda Dewi Puspitasari; Ahmad Choiry Fajar; Anisa Zulkarnain; Adhitya Yoga Purnama
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/7k5s0e50

Abstract

Corrosion and carbonation pose significant risks to reinforced concrete structures, necessitating timely patch repairs, especially when using seawater-mixed mortar. This study evaluated the influence of binder type, cover thickness, corrosion protection methods, and exposure conditions on the durability of reinforced concrete. Specimens using Portland Pozzolan Cement (PPC) and Portland Composite Cement (PCC) with 3 cm and 5 cm cover depths were tested over 400 days. PCC exhibited superior corrosion resistance due to its higher CaO content, enhancing strength, reducing permeability, and limiting chloride ion ingress. Surface concrete coatings were the most effective in mitigating carbonation, limiting carbonation depth to 0.38 cm, while steel-coated and uncoated specimens showed greater depths of 0.50 cm and 0.55 cm, respectively. Exposure conditions significantly influenced performance, with dry and dry-wet cycles accelerating carbonation, while wet conditions provided better protection. The findings recommend PCC-based mortar combined with surface coatings for patch repair applications to improve long-term durability in marine environments.

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