Vol. 22 No. 1 (2026): January - June

Research Articles

• A Study on Reducing Transportation Costs: A Case Study of ABC Concrete Panel and Construction Materials Manufacturing Company

  Ratchadakorn Poohoi, Chayachot Chaleeprom

  1-14

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• Clustering and Analysis of Circular Economy Indicators by Economic Sector and Waste Type Using Machine Learning

  Noppadol Panchan

  15-35

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• Reducing Electrical-Test Cycle Time for Electronic Component

  Chayathach Phuaksaman

  36-47

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• Optimal Order Quantity for Football Jersey Inventory Under Normal and Seasonal Demand Using FlexSim

  Anan Butrat, Chutikarn Suppatvech

  48-67

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• A Saving Algorithm Approach to Flight Path Management for Unmanned Aerial Vehicles

  Jittraphon Sangsiri, Yossapol Pongkaew, Jiravud Klongtrujrok, Thapanat Buaphiban

  68-82

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• Removal of Periodic Noise in Digital Images Using an Improved Notch Filter

  Nalinnipa Arthan, Chaiyaporn Panyindee

  83-100

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• Critical Frequency and Peak Height Variations of the F2 Ionospheric Layer in the Near-Equatorial Region During Low-Solar Activity

  Patapong Panpiboon, Saharat Sathipchan

  101-114

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• Waste Reduction of Press Load Testing in Steering Shaft Spline Production Process

  Thanchuda Phannikul, Juthamas Daungjai

  115-130

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• Prediction of Sediment Accumulation Tendency During Heavy Rainfall in Khao Makok Area Using the HEC-RAS Model

  Ronnakorn Soisee, Pinit Ruttanaporamakul, Atichart Aungkosachanawanich, Punnarust Silparattanawong

  131-146

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• Evaluation of Engineering Properties of Recycled Asphalt Concrete Mixtures Containing 100% Original Asphalt Concrete Using Three Types of Asphalt Recycling Agent

  Kamonwin Prasomsri, Nirachorn Nokkaew

  147-167

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