Column-oriented database systems (column-stores) have attracted a lot of attention in the past few years. Column-stores, in a nutshell, store each database table column separately, with attribute values belonging to the same column stored contiguously, compressed, and densely packed, as opposed to traditional database systems that store entire records (rows) one after the other. Reading a subse...

Dear Readers: It is with pleasure that I present to you this month’s extensive issue of 16 excellent papers that show the range of subjects covered by J.UCS. The issue also shows the international flavour of our journal: the contributions come from 16 countries! Those are, in alphabetical order: Australia, Austria, China, Czech Republic, Egypt, Greece, India, Iran, Italy, Japan, New Zealand, Pa...

tion is the importance of random events in generating cell behavior. All biological processes, at the cellular as well as the organismal and evolutionary levels, rely on the energy-dependent reinforcement and perpetuation of random accidents to maintain and transmit information. We appreciate the overwhelming importance of random events in evolution, but randomness rules biology at the microsco...

We present high-level technical summaries of ve recent results on the computational complexity of the shortest lattice vector problem.

Erratum After the publication of this article [1] it was noticed that Table 3B was misaligned. In Table 3B in both the PDF and online versions: Mexican Americansthe numbers "135, 236, Ref, 41, 330, Ref" should be shifted to the right (i.e., "135" should read under MetS "Yes" column; "236" under MetS "No" column; "Ref" under "PR" column for MetS ; "41" under CVD risk (>15%) "Yes" column; "330" u...

a column of alumina modified with sodium dodecyl sulfate (sds) and dimethylglyoxime (dmg) was prepared for the preconcentration of trace nickel from water samples for flame atomic absorption spectrometry (faas) determinations. under optimized conditions (ph=7.0; flow rate: 20 mlmin-1) nickel was retained on the column. the nickel collected on the column was eluted with 5 ml of 1 m nitric acid. ...

Let p1, p2,..., pn be a sequence of n pairwise coprime positive integers, and let P = p1p2...pn. Let 0, 1, ...,m − 1 be a sequence of m different colors. Let A be an n ×mP matrix of colors in which row i consists of blocks of pi consecutive entries of the same color, with colors 0 through m − 1 repeated cyclically. The Monochromatic Column problem is to determine the number of columns of A in w...

Now and then, we see discussions or debates about orchestration versus choreography. Often, it’s no more than the standard ‘my technique is better than your’s’, talking but not listening approach. Or, it’s focused on a simplified differentiation between BPEL and WS-CDL aimed at making sense of why we have so many different standards (good question). Here, the typical line is that BPEL is for or...