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Journal of Creativity Student
Published by Universitas Negeri Semarang
ISSN : 18581196     EISSN : 23553596     DOI : https://doi.org/10.15294/jcs
Core Subject : Social,
Social Sciences
Journal of Creativity Student (ISSN 2502-1958 and 2962-603X, see also Portal ISSN) is a double blind peer reviewed journal published by Research & Community Services Unit, Universitas Negeri Semarang (LPPM UNNES). The Journal publishes scientific papers concerning creativity in broad range and by encouraging the interdisciplinary study of creativity, including the resulty of student’s creativity program. The Editor will only process the article has not been published in other media with the writing format as listed on page manuscript writing guidelines. The Journal has been indexed by DOAJ, GARUDA, SINTA 4, Crossref and published biannually every January & July. Citation Analysis of the Journal, please refer to Dimensions and Scopus Citedness.
Arjuna Subject : Ilmu Sosial - Ilmu Sosial (Lain-Lain)
Articles 89 Documents
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Evaluation of Gelatin Concentration Variations on the Porosity ofGreen Mussel Shell Hydroxyapatite Scaffolds Firda Aulia Rahman; Widi Widayat
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62249

Abstract

The increasing demand for scaffolds in orthopedic applications has driven research into locally sourced biomaterials. Thisstudy evaluates the effect of varying gelatin concentrations (2%, 3%, and 4% w/w) on the porosity of hydroxyapatite (HA) scaffolds synthesized from green mussel shells (Perna viridis). HA was synthesized through a calcination process at a temperature of 900°C, followed by microwave-assisted ultrasonic precipitation, yielding a phase purity of 98.4% as confirmed by X-ray diffraction (XRD). The composite scaffolds were fabricated by mixing HA with type B gelatin at threeconcentrations, molded into cylindrical molds (6 mm diameter × 6 mm height), and dried at 40°C for 24 hours. Porositywas measured using the Archimedes liquid displacement method with 96% ethanol. The results indicated porosity valuesof 57.4% ± 1.68%, 60.2% ± 2.97%, and 58.1% ± 1.15% for gelatin concentrations of 2%, 3%, and 4%, respectively. All formulations exceeded the lower limit of commercial scaffold porosity standards (35–50%), with the 4% formulationapproaching the upper limit of that range. This study demonstrates that HA derived from green mussel shells combinedwith gelatin produces scaffolds with a porosity comparable to commercial products, thereby offering an economical andsustainable alternative for bone tissue engineering applications.
In Vitro Degradation Rate of Gelatin/Hydroxyapatite CompositeScaffolds Derived from Blue Swimming Crab Shells Candra Aditya Putra; Widi Widayat
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62372

Abstract

Bone tissue damage is a serious health problem that requires bone graft treatments. Blue swimming crab shell waste has proven effective for utilization as a hydroxyapatite (HA) source due to its high calcium content. However, HA possesses a drawback in the form of brittle mechanical properties, making the addition of an organic polymer matrix such as gelatin necessary. This study aims to analyze the effect of varying gelatin and HA compositions (6:94, 7:93, and 8:92 wt%) on thein vitro degradation rate of HA-Gel scaffolds. HA was calcined and synthesized using a microwave-assisted precipitationmethod, and subsequently characterized using X-Ray Diffraction (XRD). The scaffolds were fabricated using the slurrycasting method and then dried using the oven drying method. The in vitro degradation rate testing was conducted in a Phosphate Buffered Saline (PBS) solution at a temperature of 37°C for 1, 2, 3, 6, 12, 18, and 24 hours. The XRD resultsvalidated that blue swimming crab shells are effective in producing HA with a phase purity level reaching 99.1%. The fabrication of HA-Gel scaffolds using the slurry casting method successfully formed uniformly shaped scaffolds, althoughsurface defects in the form of voids were present. The in vitro degradation rate exhibited a residual mass of 100–101.8% across all variants, indicating that degradation had not yet occurred; instead, swelling by the gelatin matrix took place. The variant with the highest HA content (94%) demonstrated the largest and most fluctuating mass increase, while the variantwith the highest gelatin content (8%) was the most stable, indicating good mass resistance of the HA-Gel scaffolds duringthe initial immersion phase.
Hardness of Hydroxyapatite-Based Scaffolds Derived from Green Mussel Shells at Various Gelatin Concentrations Ikhya Ulumuddin; Widi Widiyat
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62389

Abstract

Large-sized bone defects require scaffolds capable of supporting tissue regeneration while possessing adequate mechanical characteristics. This study aims to analyze the effect of varying gelatin compositions on the hardness characteristics of hydroxyapatite-based scaffolds synthesized from green mussel shells (Perna viridis). Hydroxyapatite was synthesized using calcium precursors derived from calcined green mussel shells and subsequently characterized using X-Ray Diffraction (XRD). The scaffolds were fabricated using the slurry casting method with gelatin composition variations of 2%, 3%, and 4%, alongside hydroxyapatite compositions of 98%, 97%, and 96%, respectively. The mechanical characteristics of the scaffolds were tested using a Copley TBF 1000 Tablet Hardness Tester to obtain the breaking force values. The XRD results demonstrated that the synthesized material was dominated by a hydroxyapatite phase with a weight percentage of 98.7%, while the calcite and portlandite phases were 1.0% and 0.3%, respectively. The testing results indicated that the commercial scaffold exhibited the highest breaking force value of 3.51 kg. For the green mussel shell scaffolds, the highest value was obtained at the 2% gelatin variation at 1.37 kg, followed by 4% gelatin at 0.96 kg, and 3% gelatin at 0.69 kg. After conversion using the ASTM C496 equation, the mechanical value of the commercial scaffold was 0.609 MPa, whereas the 2%, 3%, and 4% gelatin variations were 0.238 MPa, 0.120 MPa, and 0.130 MPa, respectively. All of these values remained below the mechanical requirement of ≥1.5 MPa. Thus, the variation in gelatin composition influenced the mechanical characteristics of the scaffolds in a non-linear manner. The 2% gelatin composition produced the best mechanical characteristics compared to the other variations; however, it still requires further development to meet the mechanical requirements for bone graft materials.
Experimental Analysis of Performance, Fuel Consumption, and Noise in Three Exhaust Configurations of a 145 cm³ Bore-Up Yamaha Jupiter Z Mahendra Suryo Prabowo; Kriswanto Kriswanto; Abdurrahman Abdurrahman; Basyirun Basyirun; Ahmad Roziqin
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62474

Abstract

Exhaust-system modification is a creative engineering problem because gains in engine performance can conflict with fuel-use efficiency and acoustic control. This study evaluates three exhaust configurations standard, free-flow, and Hight Performance Low Pollution Muffler (HPLPM) Mod 2 on a 145 cm³ bore-up Yamaha Jupiter Z engine to identify their multi-criteria trade-offs. A laboratory experiment measured torque and brake power using a chassis dynamometer, fuel consumption using a volumetric method, and A-weighted sound pressure level under controlled operating conditions. The free-flow configuration produced the highest maximum torque (13.10 N·m) and brake power (13.10 HP) and showed lower fuel consumption at low-to-medium engine speeds, although consumption increased at high speed. HPLPM Mod 2 consistently provided the strongest acoustic control, with a maximum measured level of 95.55 dB(A), compared with 101.85 dB(A) for the free-flow configuration. These results show that no single exhaust configuration simultaneously optimizes all performance criteria. The study contributes a multi-criteria experimental basis for creative exhaust-system selection: free-flow prioritizes performance, whereas HPLPM Mod 2 offers a more balanced compromise between performance and noise control.
Experimental Analysis of Bamboo Strip Perforation Geometry on the Impact Response and Water Absorption of Epoxy Composites Muhammad Abiyyu Hafizh Harahap; Kriswanto; Muhammad Irfan Nuryanta
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62489

Abstract

Local geometric modification of natural fiber reinforcement offers a non-chemical route for tailoring compositebehavior, but the effect of perforating bamboo strips on mechanical response and moisture uptake remainsinsufficiently resolved. This study experimentally evaluated the influence of bamboo-strip perforationgeometry on the impact response and short-term water absorption of epoxy composites. Three-layer cottonfiber, bamboo strip, and cotton fiber laminates were fabricated by hand lay-up. Charpy impact testing, adaptedfrom ASTM D6110, compared perforation diameters of 0, 3.2, 4, and 6 mm, while water absorption testing,adapted from ASTM D570, compared 0, 1, 2, and 3 perforations of 3.2 mm diameter after 1, 2, and 3 h ofimmersion five specimens were tested for each variation. Impact strength showed a non-monotonic response,reaching 200.1 kJ/m² at 6 mm and 157.71 kJ/m² at 4 mm. Water absorption increased with immersion timein all configurations, while the one and three perforation configurations generally produced lower mean valuesthan the unperforated control. The results show that perforation geometry should be treated as a configurationdependent, multi response design variable rather than a uniformly beneficial interfacial modification.Microstructural characterization and inferential analysis are required to verify the mechanisms underlyingthese trends and their statistical robustness.
Quality of “Vousmevoyes” Ready-to-Wear Fashion Products Featuring QR Codes Aiana Kylani; Widowati Widowati
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62506

Abstract

The development of fashion products increasingly integrates cultural elements and digital technology to create innovative and functional ready-to-wear garments. This study aimed to evaluate the quality of a ready-to-wear garment with a street tech concept and QR Code integration. The Vousmevoyes product combines streetwear characteristics, batik as a cultural element, and QR Code technology integrated through embroidery on a cropped jacket. The study employed the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model combined with a descriptive quantitative approach. Product quality was evaluated by six panelists consisting of two experts and four trained experts using a five-point Likert scale. The assessment covered six aspects: design, size, aesthetics, sewing technique, garment performance, and uniqueness. The obtained scores were converted into percentages to determine the quality category. The results showed that the overall product quality achieved a score of 82.22%, categorized as very good. The highest score was obtained for the size aspect (93.33%), followed by uniqueness (86.67%) and garment performance (83.33%), while the lowest score was obtained for design (73.33%), which remained in the good category. These findings indicate that the developed garment successfully integrates cultural and digital elements while maintaining good technical and functional quality. Further development should focus on improving the visual coherence of the street tech concept, particularly in integrating the garment silhouette, batik elements, materials, and QR Code technology. 
Potential of Freshly Fallen Elaeocarpus ganitrus Leaves as a Sustainable Ecoprint Biomaterial Kristiana Dita Maharani; Widowati Widowati
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62510

Abstract

The textile industry continues to face environmental challenges due to the intensive use of synthetic dyes and chemical processing, encouraging the exploration of sustainable biomaterials for textile production. Ecoprint has emerged as an environmentally friendly textile coloration technique; however, most studies still rely on fresh leaves harvested directly from plants. This study aimed to describe the ecoprint production process using newly fallen Elaeocarpus ganitrus leaves and to evaluate the quality of the resulting ecoprints. A descriptive quantitative approach with a comparative design was employed using five treatment variants: fresh leaves, untreated newly fallen leaves, steamed newly fallen leaves, vinegar-treated newly fallen leaves, and alcohol-treated newly fallen leaves. Ecoprints were produced on silk-cotton fabric using the steam ecoprint technique. Product quality was evaluated by seven expert panelists based on five indicators: motif clarity, sharpness of leaf vein detail, color intensity, color evenness, and overall aesthetic quality. Data were analyzed using descriptive statistics and the Friedman test. The results showed that all treatment variants produced ecoprints with good to very good quality. Untreated newly fallen leaves achieved the highest overall mean score (4.08), whereas steamed leaves recorded the lowest (3.91). However, the Friedman test indicated no statistically significant differences among treatments across all quality indicators (p > 0.05). These findings demonstrate that newly fallen Elaeocarpus ganitrus leaves can be directly utilized as an alternative ecoprint biomaterial without requiring additional pre-treatment, thereby simplifying the production process while supporting more sustainable utilization of local plant biomass.
Feasibility Study on an Advanced Layered Haircut Tutorial Video for the Beauty Therapy Program Septia Ayu Imelda; Sri Endah Wahyuningsih
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62671

Abstract

This study aims to enrich teaching materials by presenting educational videos on advanced layer cut techniques and toevaluate their effectiveness as a learning tool. The research method used is Research and Development (R&D), adopting the ADDIE development model, which includes the phases of needs analysis, design, product development, implementation, and evaluation. Data collection was conducted using validation instruments completed by subject matter experts and media experts, as well as a questionnaire to gather user feedback. The findings of this study indicate that the developed video media was deemed suitable based on assessments by subject matter experts, media experts, and user responses. Furthermore, this instructional video successfully presented the steps for layered hair cutting in a structured, engaging, and easy-to-understand manner, thereby facilitating learners in mastering and practicing the layered hair cutting method.
Performance Analysis of a 1-Slot 1-Pole Orbital Electric Motor with Rotor Variations Using ANSYS Electronics Bagus Akbar Prihartanto; Widya Aryadi
Journal of Creativity Student Vol. 9 No. 3s (2026): Special Edition
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v9i3s.62680

Abstract

Global warming and rising carbon emissions from the transportation sector have accelerated the development of electric vehicles, making the selection of an appropriate electric motor design essential. This study examines the performance characteristics of a ring-type orbital electric motor with a 1-slot 1-pole configuration by comparing two rotor materials, namely pure permanent magnet (Neodymium NdFe30) and low carbon steel (Steel 1010), in terms of flux linkage, electromagnetic force, and torque. Simulations were conducted using ANSYS Maxwell, a Finite Element Method (FEM)-based tool within ANSYS Electronics, employing a Magnetostatic Solver across a rotor rotation angle range of -50° to 50° with a 1° step. The results show that the low carbon steel rotor produced a higher maximum force and torque than the pure permanent magnet rotor, reaching 362.373 N (217% higher than 114.427 N) and 146.829 Nm (17.5% higher than 124.944 Nm), respectively. For flux linkage, both rotors exhibited similar baseline values but moved in opposite directions as the rotor approached its central position, with the low carbon steel rotor increasing to 1.62377 Wb and the pure permanent magnet rotor decreasing to -0.260653 Wb, resulting in a deviation approximately 64.3% larger for the low carbon steel rotor. Across all three parameters, the low carbon steel rotor exhibited sharper and more concentrated fluctuations, whereas the pure permanent magnet rotor produced smoother, more stable, and evenly distributed responses throughout the tested angular range.

Page 9 of 9 | Total Record : 89

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