In his paper “Should the two-headed disk be greedy? Yes, it should” Hofri defined a “greedy policy” as follows. Assuming that the range of disk addresses is [OJ], a request at location x is served by the closest arm while the other arm jockeys to a new position, z, where z = (1/3)x or z = 2/3 +x/3 depending on whether x is larger or smaller than l/2. Hofri proved that this policy minimizes the ...

More firms today are beginning to realise the importance of corporate social responsibility (CSR), and its impact on societal well being, apart from the overall governance of the supply chain processes of every organisation. Ratings are being developed to measure performances of most firms with regard to their CSR efforts besides their financial performance. This rating would then be used to me...

A tight upper bound of the lumped disk seek time for the Scan disk scheduling policy is presented. The tight upper bound is based on an accurate disk seek time model. One of the most important applications of the tight upper bound is in multimedia storage system design. Without a tight upper bound based on an accurate disk seek time model, the designers of multimedia storage systems would be fo...

Through an experiment, t his study investigates the effects that verification has on honest traders. This paper demonstrates that by reducing the scope for trust verification can have a negative effect on the behaviour of honest individuals. Specifically, the analysis shows that trustworthy agents are willing to punish or seek compensation from those that deprive them of trust opportunities thr...

OBJECTIVE To assess the discriminative capacity of the Kenny Music Performance Anxiety Inventory (K-MPAI), in its version adapted for Brazil, in a sample of 230 Brazilian adult musicians. METHOD The Social Phobia Inventory (SPIN) was used to assess the presence of social anxiety indicators, adopting it as the gold standard. The Mann-Whitney U test and the receiver operating characteristic (RO...

Background. Previous studies have demonstrated that men are more likely than women to slow in the marathon (footrace). This study investigated whether the sex difference in pacing occurs for a shorter race distance. Materials & Methods. Data were acquired from the Bolder Boulder 10 km road race for the years 2008-2013, which encompassed 191,693 performances. There were two pacing measures, perc...