2 Aircraft cabin ventilation In early commercial jet aircraft, passenger cabins were ventilated with 100% outside air. In more recent jet aircraft, approximately 50% of the ventilation air is outside air and the remaining 50% is filtered recirculated cabinair. This development has allowed for fuel savings as well as a supposed improvement in the relative humidity of cabin air. With typical pass...

Orthogonal Frequency Division Multiplexing (OFDM) is well known Technique for transmitting large data Over Radio waves. Its main disadvantage is PAPR (Peak to average power ratio) nothing but several sinusoidal leads. This paper presents Reduction PAPR using all proposed techniques . This Proposed techniques shows better performance for reduction in PAPR any technique can be used according to p...

OBJECTIVE To describe the utility of high frequency jet ventilation (HFJV) as a rescue therapy in patients with respiratory failure secondary to respiratory syncytial virus (RSV) that was refractory to conventional mechanical ventilation (CMV). DESIGN Descriptive study by retrospective review. SETTING Pediatric intensive care unit at a tertiary care children's hospital. PATIENTS Infants o...

A 10-year-old, 36-kg child with a malignant air leak who failed conventional mechanical ventilation and high-frequency jet ventilation was successfully treated with a neonatal high-frequency oscillatory ventilator for 31 days. Since the air leak resolved with minimal hemodynamic compromise, this technique may have application in the management of respiratory failure and air leak in the older an...

Knowledge of the airflow distribution inside a Tunnel Boring Machine (TBM) can create a safe working environment for workers and machinery. The airflow quality and the related mass flow rate in the ventilation system should be sufficient to dilute gases and remove dust inside the tunnel. In this work, airflow distribution in the single shield TBM tunnel was studied using computational fluid dyn...

Non-biological descriptors such as jet feeding pressure and oscillator stroke volume are often used to describe HFV. This results in confusion and hinders acceptance of HFV. The goal of this paper is to show how physiological parameters which are valid during HFV can be monitored. Airway pressure measured in narrow tubes with high linear flow rates is underestimated. A relevant airway pressure ...

Corresponding author: Hyung Tae Kim, M.D., Department of Anesthesiology and Pain Medicine, Presbyterian Medical Center, Junghwasandong 1-ga, Wansan-gu, Jeonju 560-750, Korea. Tel: 82-63-230-1593, Fax: 82-63-230-8169, E-mail: [email protected] This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http:// creativecommons.org/lice...

Powder blasting, or Abrasive Jet Machining (AJM), is a technique in which a particle jet is directed towards a target for mechanical material removal. It is a fast, cheap and accurate directional etch technique for brittle materials like glass, silicon and ceramics. By introducing electroplated copper as a new mask material, the feature size of this process was decreased. It was found that blas...