Between Many Rocks and Hard Places

Rocks and hard places: development research between neoliberal globalism and global neoliberalism

Groundwater Development in Hard Rocks

Groundwater development in fractured hard rock aquifers has always assumed a secondary role compared with that in unconsolidated alluvial strata or in soluble carbonate rocks. This is because of the nonextensive, irregular, nonisotropic, and inhomogeneous nature of the aquifer and the relatively small yields of water available from dug-wells or drilled bores. However, many of the highly populat...

Succinct Permanent is NEXP - hard with Many Hard Instances ∗ ( Extended

A long standing issue in theoretical computer science is to find a problem that is both hard to solve and hard to solve on many instances. In this work we prove that the Succinct Permanent mod p is NEXP time hard in the worst case (via randomized polynomial time reduction). We find hard instance for any given heuritsic, either by running the heuristic applying the techniques in [3] toNEXP , or ...

Succinct Permanent Is NEXP-Hard with Many Hard Instances

Finding a problem that is both hard to solve and hard to solve on many instances is a long standing issue in theoretical computer science. In this work, we prove that the Succinct Permanent mod p is NEXP time hard in the worst case (via randomized polynomial time reduction). We find hard instances for any given heuristic, either by running the heuristic, applying the techniques in [5] to NEXP ,...

Pure gaps on curves with many rational places

We consider the algebraic curve defined by $y^m = f(x)$ where $m \geq 2$ and $f(x)$ is a rational function over $\mathbb{F}_q$. We extend the concept of pure gap to {\bf c}-gap and obtain a criterion to decide when an $s$-tuple is a {\bf c}-gap at $s$ rational places on the curve. As an application, we obtain many families of pure gaps at two rational places on curves with many rational places.