Chest physical therapy (CPT) is a widely used intervention for patients with airway diseases. The main goal is to facilitate secretion transport and thereby decrease secretion retention in the airways. Historically, conventional CPT has consisted of a combination of forced expirations (directed cough or huff), postural drainage, percussion, and/or shaking. CPT improves mucus transport, but it i...

The introduction of the Huff model is of critical significance in many fields, including urban transport, optimal location planning, economics and business analysis. Moreover, parameters calibration is a crucial procedure before using the model. Previous studies have paid much attention to calibrating the spatial interaction model for human mobility research. However, are whole sampling locatio...

Vibration is a manual technique used widely to assist with the removal of pulmonary secretions. Little is known about how vibration is applied or its effect on the respiratory system. The purpose of this study was to describe mechanical consequences of vibration on the chest wall of a normal subject and the effects of vibration on expiratory flow rates and volumes. The effects of vibration were...

Gambling using electronic gaming machines has emerged as a significant public health issue. While social impact assessments are required prior to the granting of new gaming licenses in Australia, there are few established techniques for estimating the spatial distribution of a venue’s clientele. To this end, we calibrated a Huff model of gambling venue catchments based on a geocoded postal surv...

Lepkov8ky, S., Roboz, E. & Haagen-Smit, A. J. (1943). J. biol. Chem. 149, 195. Lichstein, H. C. & Umbreit, W. W. (1947). J. biol. Chem. 170, 329, 423. Luecke, R. W., McMUllen, W. N., Throp, F. & Tull, C. (1947). J. Nutr. 38, 251. Mehler, A. H. & Knox, W. E. (1950). J. biol. Chem. 187, 431. Mitchell, H. K. & Nyc, J. F. (1948). Proc. Nat. Acad. Sci., Wa8h., 34, 1. Porter, C.0., Clark, I. & Silber...

In their letter to EHP, Huff et al. (1) maintained that arsenic is still viewed as "a paradoxical carcinogen; that is, carcinogenic to humans but not to laboratory animals," and that this paradox will be believed until car-cinogenicity of arsenic is demonstrated in animal experiments such as "long-term inhalation studies using arsenic trioxide." Huff et al. (1) seem not to take into considerati...