We show that for any radio network there exists a schedule of a broadcast whose time is O(D+ log5 n), where D is the diameter and n is the number of nodes. (This result implies an optimal broadcast to networks with D =Ω(log5 n).) We present a centralized randomized polynomial time algorithm that given a network and a source, outputs a schedule for broadcasting the message from the source to the...

This paper presents a mechanism in developing work-rest schedules for construction labors. Two objectives are balanced in the optimization processes. These objectives include minimizing the time for completing jobs as well as minimizing total extra energy that labors expend due to inappropriate work assignment which forces labors to working longer than maximum acceptable work duration. Experime...

The components of the material structure that are important in calculating requirements iron because have a high value construction work. Iron such as reinforcing columns, beams, pile caps, sloofs, and others widely used for reinforcement. research aims to determine need stirrup reinforcement using method based on field data with Bar Bending Schedule (BBS) approach. BBS minimises waste so it on...

Cephalotaxine alkaloids have been extensively used in the Peoples Republic of China for treatment of acute leukemias and solid tumors (Yu-hua, L., Shu-fen, G., Fu-ying, Z., Shu-zhi, X., and Hui-lin, Z. Chin. Med. J., 96: 303-305, 1983). Several Phase I trials of homoharringtonine have been completed in the United States using either bolus administration or continuous infusion over a 5-day perio...

OBJECTIVE The aim of this study was to assess effectiveness of an alternative, 24-hr-on/72-hr-off watchstanding schedule on sleep and morale of personnel assigned to the President's Emergency Operations Center (PEOC). BACKGROUND As part of the White House Military Office, PEOC personnel historically worked a 12-hr "Panama" watch schedule. Personnel reported experiencing chronic insufficient a...

Rest activity pattern was studied in wild-captured males of Octodon degus (n=9), Octodon bridgesi (n=3), and Spalacopus cyanus (n=6) (Rodentia: Octodontidae). Ten-minute resolution actograms were constructed from data obtained by an automated acquisition system. After two months of habituation to a stable light-dark schedule, recordings were performed in isolation chambers under a 12: 12 Light ...

This study reviews a series of cutaneous leishmaniasis cases diagnosed and treated in outpatient units in the municipality of Rio de Janeiro, where the intermittent schedule of antimonial therapy was replaced by the continuous regimen. Both schedules were based on daily intramuscular injections of pentavalent antimonial. Forty-nine subjects received the intermittent regimen, consisting of three...

To determine if the type of work performed should be considered in research on shift work and cardiovascular disease, we compared the heart rates, total number of steps walked, and blood pressures of 12 shift workers on the same rotating 3-shift schedule in a pulp and paper mill. Six workers were selected from the paper manufacturing section (group 1) and six workers from the chemical products ...

OBJECTIVE To evaluate a new work schedule at a Finnish steel mill with special attention to effects on older workers. The schedule was designed to improve sleep before the morning shift, and alertness during the morning shift, by delaying shift start and end times. METHODS Evaluation was by a shiftwork health and safety questionnaire, recordings of work-rest-sleep cycles with activity monitor...

In practice, machine schedules are usually subject to disruptions which have to be repaired by reactive scheduling decisions. The most popular predictive approach in project management and machine scheduling literature is to leave idle times (time buffers) in schedules in coping with disruptions, i.e. the resources will be under-utilized. Therefore, preparing initial schedules by considering po...