Evaluation of Shock Tube Retrofitted with Fast-Opening Valve for Dynamic Pressure Calibration

Shock-Tube Calibration of a Fast-Response Pressure Transducer

Towards a shock tube method for the dynamic calibration of pressure sensors.

In theory, shock tubes provide a pressure change with a very fast rise time and calculable amplitude. This pressure step could provide the basis for the calibration of pressure transducers used in highly dynamic applications. However, conventional metal shock tubes can be expensive, unwieldy and difficult to modify. We describe the development of a 1.4 MPa (maximum pressure) shock tube made fro...

diagnostic and developmental potentials of dynamic assessment for writing skill

این پایان نامه بدنبال بررسی کاربرد ارزیابی مستمر در یک محیط یادگیری زبان دوم از طریق طرح چهار سوال تحقیق زیر بود: (1) درک توانایی های فراگیران زمانیکه که از طریق برآورد عملکرد مستقل آنها امکان پذیر نباشد اما در طول جلسات ارزیابی مستمر مشخص شوند; (2) امکان تقویت توانایی های فراگیران از طریق ارزیابی مستمر; (3) سودمندی ارزیابی مستمر در هدایت آموزش فردی به سمتی که به منطقه ی تقریبی رشد افراد حساس ا...

The Deflation (Passive) Opening Pressure of the Eustachian Tube

OBJECTIVE: To compare the air deflation pressure of the eustachian tubes in patients with tympanic membrane perforations due to various forms of otitis media and those with myringotomy or blast injury perforations. METHODS: The study group consisted of 321 patients (407 ears) aged 4 months to 91 years with tympanic membrane perforations due to otitis media (318 ears), blast injury (27), and myr...

evaluation of fat atrophy in patients with dermis fat graft of orbit by ct-scan

چکیده ندارد.