Sloshing due to ground motion develops large pressure on the walls of water retaining tanks. This paper evaluates the efficacy of padded walls on the reduction of sloshing effects in rectangular water storage tanks subjected to ground motion. An analytical solution based on velocity potential function is provided to obtain the response of  rigid and padded wall tanks in terms of the wave elevat...

Orthogonal frequency division multiplex (OFDM) systems are particularly straightforward to understand in the frequency domain. The purpose of this paper is to draw attention to the fact that zero padded block transmissions also have a straightforward frequency domain interpretation. The advantages of this interpretation are illustrated by three additional results which further the understanding...

Padded-sorting is a task of placing input items in an array in a nondecreasing order, but with free space between consecutive elements allowed. For many applications, padded-sorting is as useful as sorting. Approximate compaction and compression are closely related problems. It is known that time complexity of padded-sorting on randomized CRCW PRAMs is dramatically lower than time complexity of...

Conventional parallel sorting requires the n input keys to be output in an array of size n, and is known to take fl(log n/log log n) time using any polynomial number of processors. The lower bound does not apply to the more "wasteful" convention of padded sorting, which requires the keys to be output in sorted order in an array of size (1 + o(1))n. We give very fast randomized CRCW PRAM algorit...

In this paper, we first review popular schemes for block transmission within the framework of affine precoding. We then briefly present existing channel identification techniques that only rely on the redundant symbols introduced by these block transmission schemes. We then present the major contribution of this paper, which is a new stochastic channel identification method suited for Non-Zero ...

The interface pressures were measured between the sacrum, mid-lumbar spine and various support surfaces. Thirty healthy male volunteers were recruited. The spinal board, padded spinal board and vacuum stretcher were the support surfaces evaluated. We found high and potentially ischaemic pressures between the sacrum and the spinal board interface (mean 147.3 mmHg). This was reduced in the padded...

BACKGROUND Chronic ulnar nerve compression is believed to be the primary cause of sensory and motor impairments of the hand in cyclists, a condition termed Cyclist's Palsy. The purpose of this study was to quantitatively evaluate the effects that hand position and glove type can have on pressure over the ulnar nerve, specifically in the hypothenar region of the hand. METHODS Thirty-six experi...

OBJECTIVES To determine whether padding the long spine board improves patient comfort, affects cervical spine (c-spine) immobilization, or increases sacral transcutaneous O2 tension. METHODS A prospective randomized, controlled crossover study of healthy volunteers was conducted over a two-week period. Participants included 30 volunteers with no previous history of c-spine injury or disease. ...

Existing Orthogonal Frequency-Division Multiplexing (OFDM) variants based on cyclic prefix (CP) allow for efficient time synchronization, but suffer from lower power efficiency compared to zero-padded (ZP)-OFDM. Because of its efficiency, ZP-OFDM is considered as an appealing solution the emerging low-power wireless systems. However, in absence CP, synchronization a very challenging task. In th...