ผู้ช่วยศาสตราจารย์ ดร.ปัญญา ขันธ์สุวรรณ

05/05/2017 admin บุคลากร 2505

ผู้ช่วยศาสตราจารย์ ดร.ปัญญา ขันธ์สุวรรณ

Asst.Prof.Dr.Panya Kansuwan

ประวัติการศึกษา

คุณวุฒิ
วุฒิ/สาขา
ปี พ.ศ. ที่จบ
สถาบัน
  ปริญญาตรี B.Eng. Mechanical Engineering

2540

 CU, Thailand
  ปริญญาโท M.E. Materials science and Engineering

2547

 Lehigh University, USA
  ปริญญาเอก Ph.D. Materials science and Engineering

2550

 Lehigh University, USA

วิชาที่สอนในปัจจุบัน

  • Engineering Materials
  • Engineering Mechanics
  • Thermodynamic in Materials Science
  • Kinetics in Materials sciences

งานวิจัยที่สนใจ

  • Dislocation theory
  • Fracture mechanics

2 Comments

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  2492. chronometer watches
    Understanding COSC Accreditation and Its Importance in Watchmaking
    COSC Accreditation and its Strict Criteria
    Controle Officiel Suisse des Chronometres, or the Official Swiss Chronometer Testing Agency, is the official Switzerland testing agency that certifies the precision and accuracy of timepieces. COSC validation is a sign of superior craftsmanship and reliability in timekeeping. Not all timepiece brands pursue COSC validation, such as Hublot, which instead sticks to its proprietary strict standards with movements like the UNICO calibre, attaining comparable precision.

    The Science of Exact Chronometry
    The core system of a mechanical watch involves the spring, which delivers energy as it loosens. This mechanism, however, can be vulnerable to environmental factors that may affect its accuracy. COSC-accredited movements undergo demanding testing—over fifteen days in various circumstances (5 positions, 3 temperatures)—to ensure their resilience and reliability. The tests measure:

    Typical daily rate precision between -4 and +6 seconds.
    Mean variation, highest variation rates, and impacts of temperature changes.
    Why COSC Accreditation Is Important
    For watch aficionados and collectors, a COSC-validated timepiece isn’t just a item of tech but a proof to enduring excellence and precision. It represents a timepiece that:

    Offers exceptional reliability and accuracy.
    Ensures guarantee of quality across the whole design of the timepiece.
    Is apt to maintain its value more effectively, making it a wise investment.
    Well-known Chronometer Manufacturers
    Several famous brands prioritize COSC accreditation for their timepieces, including Rolex, Omega, Breitling, and Longines, among others. Longines, for instance, presents collections like the Record and Spirit, which showcase COSC-accredited movements equipped with innovative materials like silicone balance springs to improve durability and performance.

    Historic Background and the Evolution of Timepieces
    The concept of the timepiece dates back to the requirement for exact timekeeping for navigation at sea, emphasized by John Harrison’s work in the eighteenth cent. Since the official establishment of COSC in 1973, the validation has become a standard for evaluating the accuracy of high-end timepieces, maintaining a tradition of excellence in horology.

    Conclusion
    Owning a COSC-validated timepiece is more than an visual selection; it’s a dedication to quality and precision. For those appreciating precision above all, the COSC validation offers peace of thoughts, guaranteeing that each validated watch will operate dependably under various circumstances. Whether for personal satisfaction or as an investment decision, COSC-certified watches distinguish themselves in the world of watchmaking, bearing on a legacy of meticulous chronometry.

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