This paper deals with lot sizing and scheduling for a single-stage, single-machine production system where setup costs and times are sequence dependent. A large-bucket mixed integer programming (MIP) model is formulated which considers only e$cient sequences. A tailor-made enumeration method of the branch-and-bound type solves problem instances optimally and e$ciently. The size of solvable case...

To retain viable polar bear subpopulations, scientific monitoring studies are conducted to inform adaptive management frameworks. Here we report the results of second structured population study for bears in M’Clintock Channel (MC) subpopulation. Data included biopsy samples collected during a 2014 – 16 subpopulation-wide survey, live mark-recapture data first subpopulation from 1998 2000, and ...

We study attempts to dynamically update DNS records for private (RFC1918) addresses, by analyzing the frequency spectrum of updates observed at an authoritative nameserver for these addresses. We developed a binary autocorrelation algorithm and discovered that updates come in infinite series with periods of 60 or 75 minutes. We identify both periods as default settings of out-of-the-box Microso...

Evolutionary algorithms (EA) are optimisation techniques inspired from natural evolution processes. They handle a population of individuals that evolve with the help of information exchange procedures. Each individual may also evolve independently. Periods of co-operation alternate with periods of self-adaptation. We de®ne a terminology and give a general framework for the description of the ma...

We show that reversible holomorphic mappings of C2 have periodic points accumulating at an elliptic fixed point of general type. On the contrary, we also show the existence of holomorphic symplectic mappings that have no periodic points of certain periods in a sequence of deleted balls about an elliptic fixed point of general type. The radii of the balls are carefully chosen in terms of the per...

Many species have already experienced distributional shifts due to changing environmental conditions, and analyzing past shifts can help us to understand the influence of environmental stressors on a species as well as to analyze the effectiveness of conservation strategies. We aimed to (1) quantify regional habitat associations of the California gnatcatcher (Polioptila californica); (2) descri...

Globally, urban areas are growing at a faster rate than their population, potentially reducing environmental sustainability due to undesirable land take in (semi)natural and agricultural lands. However, it is unclear what extent this trend varies locally, which may hamper the formulation implementation of local-scale policies context global competition for land. Here, we attribute built-up chan...

As a large open lake that connects to the middle reaches of Yangtze River, Poyang Lake, China, has experienced dramatic water level changes, especially during dry periods (November–March) in recent years. For better understanding shift dry-season level, we quantified variations induced by channel changes river–lake system (CCORLS). Attempts were achieved through establishing two Long Short-Term...

The first goal of this paper is to explain some important results of Wilfred Schmid from his fundamental paper [30] in which he proves very general results which govern the behaviour of the periods of a of smooth projective variety Xt as it degenerates to a singular variety. As has been known since classical times, the periods of a smooth projective variety sometimes contain significant informa...

PURPOSE To investigate trends in mortality from chronic obstructive pulmonary disease (COPD) in Wisconsin. METHODS COPD mortality data for those 45 years of age and older were extracted from the Centers for Disease Control and Prevention WONDER database and analyzed. Rates were adjusted to the 2000 US Census. RESULTS In Wisconsin, the mortality rate from COPD increased by 88% between 1980 a...