Why Join the Fed?

Fast, Randomized Join-Order Selection - Why Use Transformations?

We study the effectiveness of probabilistic selection of join-query evaluation plans, t&hout reliance on tree transformation rules. Instead, each candidate plan is chosen uniformly at random from the space of valid evaluation orders. This leads to a transformation-free strategy where a sequence of random plans is generated and the plans are compared on their estimated costs. The success of this...

Why join groups? Lessons from parasite-manipulated Artemia.

Grouping behaviours (e.g. schooling, shoaling and swarming) are commonly explicated through adaptive hypotheses such as protection against predation, access to mates or improved foraging. However, the hypothesis that aggregation can result from manipulation by parasites to increase their transmission has never been demonstrated. We investigated this hypothesis using natural populations of two c...

The locating chromatic number of the join of graphs

‎Let $f$ be a proper $k$-coloring of a connected graph $G$ and‎ ‎$Pi=(V_1,V_2,ldots,V_k)$ be an ordered partition of $V(G)$ into‎ ‎the resulting color classes‎. ‎For a vertex $v$ of $G$‎, ‎the color‎ ‎code of $v$ with respect to $Pi$ is defined to be the ordered‎ ‎$k$-tuple $c_{{}_Pi}(v)=(d(v,V_1),d(v,V_2),ldots,d(v,V_k))$‎, ‎where $d(v,V_i)=min{d(v,x):~xin V_i}‎, ‎1leq ileq k$‎. ‎If‎ ‎distinct...

Update From the Council for the Model Aquatic Health Code (and Why You Should Join).

The last week of May is Healthy and Safe Swimming Week. Eleven years ago, public health, the aquatics in­ dustry, and academia came together to rec­ ommend that the Centers for Disease Con­ trol and Prevention (CDC) develop a Model Aquatic Health Code (MAHC) to promote healthy and safe swimming. From the begin­ ning, these partners also recognized the im­ portance of keeping the MAHC up to date...

Why you should join the Elks Club rather than go to the Health Club