This paper addresses a static, n-job, single-machine scheduling problem with sequence dependent family setups. The setup matrix follows a special structure where a constant setup is required only if a job from a smaller indexed family is an immediate successor of one from a larger indexed family. The objective is to minimize the maximum lateness (Lmax). A two-step neighborhood search procedure ...

We consider the problem of scheduling n independent jobs on m identical machines that operate in parallel. Each job must be processed without interruption for a given amount of time on any one of the m machines. In addition, each job has a release date, when it becomes available for processing, and, after completing its processing, requires an additional delivery time. The objective is to minim...

In this paper, we apply the parallel predator-prey model for multi-objective optimization to a combinatorial problem for the first time: Exemplarily, we optimize sequences of 50 jobs for an instance of the bi-criteria scheduling problem 1|dj |Cj , Lmax with this approach. The modular building block architecture of the predator-prey system and the distribution of acting entities enables the anal...

How does the acquisition of a new word affect the successive acquired ones? We model language acquisition in terms of foraging in an unprecedentedly fine-grained 1-child corpus (0-3y, RoyEtAl2015). We assess whether successive words are learned in close semantic clusters or not (exploitation vs. exploration) and the structure of these clusters. Words are defined in terms of topic distribution i...

This study evaluated the impact of a participatory program to reduce noise in a neonatal intermediate care unit of a university hospital. A time-series quasi-experimental design was used, in which sound pressure levels were measured before and after the intervention was implemented using the Quest-400 dosimeter. Non-parametric statistical tests were used to compare noise with the level of signi...

In this paper, a simple and accurate modeling technique that analyzes a non-rectilinear gate (NRG) transistor with a simplified trapezoidal approximation method is proposed. To approximate a non-rectangular channel shape into a trapezoidal shape, we extract three geometry-dependent parameters from post-lithographic patterns: the minimum channel length from the slices (Lmin), maximum channel len...

The recent gamma ray burst, GRB 990123, has an absorption redshift zs = 1.60, implying an apparent energy E ≥ 3×10 erg, and a peak luminosity Lmax ≥ 6×10 53 erg s, assuming isotropic emission. This energy is ten times larger than hitherto measured and in excess of the rest mass of the sun. Optical observations have revealed an associated galaxy displaced from the line of sight by ∼ 0.6. This ra...

Spatial uniformity is one of the most important image quality attributes in visual experience of displays. In conventional researches, spatial uniformity was mostly measured with a radiometer and its quality was assessed with non-reference image quality metrics. Cameras are cheaper than radiometers and they can provide accurate relative measurements if they are carefully calibrated. In this pap...

ABSTRACT We analyse all the available Chandra observations of Cartwheel galaxy and its compact group, taken between 2001 2008, with main aim addressing variability in X-ray band for this spectacular collisional ring galaxy. focus on study point-like sources, particular we are interested ultraluminous sources (ULXs; LX ≥ 1039 erg s−1), that treat as a class. exploit archival XMM–Newton data to e...

a simple, sensitive and rapid method for determination of trace amounts of nitrite ion in real samples is reported. the reaction is initiated by adding known volumes of a nitrite ion solution of identified concentration to acidic solutions of thionine which causes decolorizaiton of reagent with time. the absorbance changes is then monitored spectrophotometrically at lmax = 602nm at 25 °c. calib...