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Open Science and Technology
Published by Research and Social Study Institute
ISSN : 2776169X     EISSN : 27761681     DOI : http://dx.doi.org/10.33292/ost
Core Subject : Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Environmental Science Mechanical Engineering
Open Science and Technology diterbitkan oleh Research and Social Study Institute sebagai sarana untuk mempublikasikan hasil penelitian, artikel review dari peneliti-peneliti dibidang Ilmu alam, Ilmu pertanian, ilmu Kehutanan, Ilmu Keteknikan, Teknologi, dan Aplikasinya. Jurnal ini terbit dua kali setahun (April dan Oktober). Jurnal ini diterbitkan secara online dan cetak. Open Science and Teknologi memilki filosofi bahwa jurnal ini terbuka untuk siapa saja baik mahasiswa, dosen, peneneliti, konsultan, praktisi di bidang ilmu sains dan teknologi secara umum untuk menerbitkan hasil studi atau penenlitiannya di jurnal ini. Jurnal ini diharapkan pula dapat menjadi jurnal yang fast respone, fast review dan fast publication. Dan kedepan dapat terakreditasi secara nasional dan terindek secara global. Open Science and Technology telah ber P-ISSN 2776-169X dan E-ISSN 2776-1681
Arjuna Subject : Umum - Umum
Articles 7 Documents
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Search results for , issue "Vol. 5 No. 1 (2025): Open Science and Technology" : 7 Documents clear
Design of Automatic Car Parking Sensor System Using Arduino Uno Program and HC-SR04 Ultrasonic Sensor Suriana, I Wayan; Pancane, I Wayan Dikse; Sugarayasa, I Wayan; Adrama, I Nyoman Gede
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.147

Abstract

Aims and Methods: One of the challenges that drivers often face when parking a vehicle is limited parking slots. Many drivers face difficulty finding parking slots due to lack of clear information about the slot availability so that they are often forced to make a U-turn after entering a parking lot that turns out to be full. In addition, the limitations of automatic parking systems in conventional vehicles also add to the difficulty in improving parking safety and efficiency, especially in narrow places. This study aims to design and build an automatic car parking sensor system by integrating Arduino-Uno program and HC-SR04 ultrasonic sensor to help drivers by providing accurate and real-time information about the availability of parking slots. The method comprised several stages: hardware designing, consisting of an Arduino Uno microcontroller, HC-SR04 ultrasonic sensor, buzzer, and LED as a warning indicator, then software programming to organize the system logic. The developed system was tested in various scenarios to evaluate both the accuracy of parking slot presence detection and the response speed.Result: The testing results show that the system is able to provide precise warnings according to the detected object in the slot, thus improving safety during the parking process.Conclusion: The Arduino-based car parking sensor system with HC-SR04 ultrasonic sensor could serve as an effective tool in detecting the presence of vehicles in the parking lot.
Effect of Gurney Flap on The Flow Separation Phenomenon on The Rear Wing Airfoil of Racing Car Kurniawan, Dondi; Yoanita, Yulia Venti; Pinindriya , Sinung Tirtha; Kumolosari, Eli; Prabowo, Angga Darma
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.150

Abstract

Background: A racing car must be able to run at high speeds. To achieve this goal, vehicle aerodynamic modifications are often carried out, one of which is adding a gurney flap (GF). The GF on a racing car function to delay the flow separation, increase the downforce value, and reduce the drag force.Aims & Methods: In this study, observations of the influence of GF were carried out by numerical simulation using Solidworks 2025 by varying the speed of 250, 320, and 400 km/h at an angle of attack of 0°, with and without GF. The aim is to obtain information on the influence of these variations on the flow separation phenomenon on the rear wing airfoil.Result: The results showed that the addition of GF caused a delay in flow separation and a decrease in wake/vortex behind the airfoil. The impact was that the drag force increased at low speeds (39.97% at 250 km/h) but showed a decrease at medium and high speeds, namely -7.91% at 320 km/h and -2.31% at 400 km/h.
The Influence of Data Utilization and Supply Chain Digitalization on the Operational Efficiency of MSMEs: A Study in Lampung Province Bursan, Rinaldi
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.151

Abstract

Aims and Methods: This study aims to analyze the effect of data capability and supply chain capability on the operational efficiency of MSMEs in Lampung Province. The method used is a quantitative approach and multiple linear regression analysis involving simulated data from 200 respondents to test the relationship between variables.Results: The results of the analysis show that supply chain capability has a more dominant and significant influence on operational efficiency compared to data capability. Data capability contributes positively and significantly to improving operational efficiency, especially when integrated into the supply chain management process. The R Square value of 0.497 indicates that almost 50% of the variation in operational efficiency can be explained by the two independent variables. The results of the study support the Resource-Based View (RBV) perspective that internal resources such as data and efficient supply chain systems are determining factors for the competitiveness of MSMEs.Conclusion: The practical implications of this study encourage the need for a digitalization strengthening program and data-based logistics systems to support local MSMEs to be more adaptive in facing market competition. This study also recommends further studies with sectoral and longitudinal approaches to understand the long-term impact of digital integration on MSME business performance.
Utilization of Kepok Banana Peel Flour (Musa paradisiaca formatypica) as a Feed Additive for Sangkuriang Catfish (Clarias gariepinus) Cultivation Qulubi, M. Hadziq; Rahmawati, Suci Hardina; Mandala, Wintari
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.123

Abstract

Background: Kepok banana peel (Musa paradisiaca formatypica) is one of the organic wastes that can be used as a feed additive and prebiotic for fish. Kepok banana peel has been less than optimally utilized even though the potential of banana in Lampung Province is very highAims & Methods: The purpose of this study was to analyze the growth of sangkuriang catfish (Clarias gariepinus) with the addition of kepok banana flour at specific concentrations and to analyze the quality of catfish cultivation water with the addition of banana peel flour. The research method was to make banana peel flour and then add it as a feed additive with a percentage of 2%, 4%, and 6%. The observations made were the growth of sangkuringan catfish and the quality of cultivation water by observing temperature, pH, and DO.Result: The results of this study indicate that the analysis of the growth of sangkuriang catfish with the addition of kepok banana flour showed that at a concentration of 6% addition to fish feed, it could increase the highest fish growth, which was 4.67g/weeks for 28 days. The results of the analysis of the quality of catfish cultivation water showed that the pH, DO, and water temperature in each treatment followed SNI 6484-6:2024.
Effect of Potassium and Plant Growth Promoting Rhizobacteria on Mung bean Yield Kiswondo, Sumiarjo
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.135

Abstract

Background: Mung beans (Vigna radiata L.) are a family of legumes and have great potential to be developed because they are one of the food crops widely consumed by the Indonesian people, market demand continues to increase both domestically and for export. However, according to the Directorate General of Food Crops (2022), in the 2021 annual report, in East Java mung bean production has decreased since 2017 - 2021. Potassium (KNO3) is a useful nutrient to meet plant needs, as well as increase yields and resistance to pests and diseases of mung bean plants. PGPR (Plant Growth Promoting Rhizobacteria) are biological agents around plant roots (rhizosphere) and play an important role in increasing plant growth and development, have a positive effect both directly and indirectly, mobilize the absorption of nutrients by plants and play a role in the fixation of free nitrogen into ammonia that can be absorbed by plants.Aims: The purpose of the study was to determine the effect of potassium and PGPR and the interaction of the two treatments on the yield of mung bean plants (Vigna radiata L).Methods: The research method used a factorial Randomized Block Design (RBD), consisting of two treatment factors and 3 (three) replications. The first factor was Potassium (K), consisting of 3 treatment levels, namely K1: 50 kg KNO3 per hectare, K2: 100 kg KNO3 per hectare, K3: 150 kg KNO3 per hectare. The second factor was PGPR fertilizer (P), consisting of 3 treatment levels, namely P1: 6 ml PGPR per liter of water, P2: 12 ml PGPR per liter of water, and P3: 18 ml PGPR per liter of water. The variables observed were plant height, stem diameter, number of pods, pod weight and dry seed weight.Result: The results of the study showed that there was an interaction between the treatment of potassium 150 kg KNO3 per hectare with PGPR 12 ml/L (K3P2) on the growth and yield of mung bean plants, the height of plants at 45 HST was 39.36 cm, the diameter of the stem at 45 HST was 8.16 mm, the number of pods was 22.33 pieces, the weight of the pods was 91.85 grams, and the weight of the seeds was 65.68 grams. The single factor of potassium treatment of 150 kg KNO3 per hectare (K3) and PGPR 12 ml/L (P2) gave the best effect on the growth of plant height, stem diameter and the results of the number of pods, pod weight and seed weight of mung bean plants.
Economic Analysis of the Losses of Oil Palm (Elaeis guineensis Jacq.) Loose Fruits on Flat Terrain at Agritasari Prima Ltd. Rannando; Tujannah, Mawaddah; Azmi, Yudia; Sahfitra, Angga Ade
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.144

Abstract

Aims and Methods: Oil palm is a strategic commodity that contributes significantly to Indonesia's economy. The losses of oil palm loose fruits during the harvesting and transportation processes of fresh fruit bunches (FFB) pose a serious challenge for oil palm plantation industry, with potential losses reaching 3–7% of total production. This study aims to analyze the distribution pattern of the losses of loose fruits at three observation points (weed circle, carrying market, and harvest collection point (HCP)) at Agritasari Prima Ltd., calculate the economic loss due to these losses, and identify the causative factors. This study employs a qualitative descriptive survey method with sampling at three plantation divisions on flat terrain, covering 1,260 weed circles, 21 carrying markets, and 144 HCPs.Results: The highest loss distribution occurred at carrying market (47.66 fruits/carrying market), followed with weed circle (10.15 fruits/circle) and HCP (8.14 fruits/site). The total economic loss reached IDR 463,143.83, with the largest contribution coming from the losses at weed circle of 85.44% (IDR 395,808), followed by HCP of 7.86% (IDR 36,307), and carrying market of 6.70% (IDR 31,028.83). The annual economic loss due to the losses of loose fruits on flat terrain at Agritasari Prima Ltd. is estimated at IDR 2,178,282,597.31 (around IDR 2.18 billion per year). Major causative factors comprise poorly maintained weed circles, overloaded wheelbarrows, poor route infrastructure at carrying markets, and suboptimal handling at HCPs.Conclusion: Implementation of regular maintenance programs, standardization of vehicles’ capacity, infrastructure improvements, and digital monitoring systems are recommended to reduce the level of losses of loose fruits and improve oil palm plantation operational efficiency.
Effect of Soil Ameliorations on Cucumber (Cucumis sativus L) Yield and Soil Physico-chemical Properties in an Ultisol of Southeastern Nigeria Ikeh, Angus Onwudiwe; Sampson, Helen Udoma; Ukabiala, Maduabuchi Ekeoma; Anonaba, Nkechinyere Kate; Okamigbo, Juliana Nkiru; Akuwueze, Chiamaka Gloria
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.146

Abstract

Methods and Aims: Field experiment was conducted at Ndikpa, Umuowa Ibu 1 via National Horticultural Research Institute (NIHORT), Okigwe Sub-Station Imo state, Nigeria in 2021 and 2022 to assess the effects of different soil amelioration on performances of cucumber and soil physico-chemical properties. The treatments were organic fertilizers (goat manure, cow dung, and wood ash) and recommended dose of inorganic fertilizer (250 kg/ha NPK), and control (no soil amendment). The experiment was laid out in a randomized complete block design and replicated thrice. Soil, growth, and yield data were collected and subjected to analysis of variance. Significant means were compared with the least significant difference at 5% probability level. Result: Results showed that cow dung had the highest organic matter content after harvesting, 2.55 and 2.43 % in 2021 and 2022, while the least organic matter content of 0.71% and 0.65 % was recorded in the control. Wood ash had significantly higher K levels after harvesting, while cow dung had the highest Ca. Goat manure had significantly higher Mg and Na than the other soil amendments. Treatment of NPK had significant fruit yield of 21.12 and 22.54 t/ha in both cropping seasons, respectively. The fruit yield recorded in goat manure was 20.23 and 20.81 t/ha in both cropping seasons, while 19.80 and 17.99 t/ha fruit yield were recorded in the wood ash treatment. The fruit yield obtained from NPK treatment was not significantly different when compared with yields obtained from goat manure and cow dung treatments. The least fruit yield, 5.12 and 6.03 t/ha in 2021 and 2022 was recorded in the control treatment. Conclusion: Based on the study findings, the application of organic soil ameliorations (cow dung and goat manure) was recommended for higher fruit yields and sound soil conservation practices for sustainable crop production in an ultisol.

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