Pigeonpea [Cajanus cajan (L.) Millsp.] is a short-day legume species and the late maturing genotypes are more photosensitive than early types. To generate information about inheritance of photo-sensitivity, this study was conducted under natural artificially extended (16 h) photo-periods using F1, F2 BC1F1 generations. Under photo-period, F1 hybrids showed partial dominance earliness; while in ...

As the resource constrained project scheduling problem (RCPSP) has a wide range of applications, its models, extensions and algorithms have been intensively studied [2]. As for objective functions, makespan minimization has commonly been used, while the importance of non-regular ones such as earliness-tardiness are also recognized. In this paper, we introduce a time-lag cost, which is charged a...

We study problems of scheduling n unit-time jobs on m identical parallel machines, in which a common due window has to be assigned to all jobs. If a job is completed within the due window, then no scheduling cost incurs. Otherwise, a job-dependent earliness or tardiness cost incurs. The job completion times, the due window location and the size are integer valued decision variables. The objecti...

BACKGROUND Non-attendance and late arrivals diminish patient flow in outpatient clinics. On the other hand, patient earliness may also be undesirable. Physicians often experience that older patients are more punctual than younger patients, and often they come excessively early. The aim of this study was to determine whether an association between age and outpatient clinic arrival time could be ...

In this study, we consider single-machine scheduling problems with past-sequence-dependent (denoted by psd) setup times in which the of jobs are proportional to length already processed jobs. Under common (CON) and slack (SLK) due-date assignment methods, prove that weighted sum earliness, tardiness minimization remains polynomially solvable. We also give some extensions for psd times.

in this study six genotypes of upland cotton (g. hirsutum l.) were crossed in a half diallel (6×6) mating fashion. the parents and f1s were planted in a complete randomized block design with three replications at the hashemabad cotton research station (gorgan) in 2005. cotton yield and some agronomic traits were evaluated. analysis of variance showed that differences due to genotypes were signi...

This paper considers a bi-criteria planning problems on single machine, with the goal of minimizing total square time duration and maximizing earliness. To solve this problem we have to find Pareto set. We introduced strong relation between lower bound, upper bound number efficient solutions via theorem which shows also that is near optimal solution if small.