Dilution can best be defined as the proportion of waste tonnage to the total weight of ore and waste in each block. Predicting the internal dilution based on geological boundaries of waste and ore in each block can help engineers to develop more reliable long-term planning designs in mining activities. This paper presents a method to calculate the geological internal dilution in each block and ...

Explicit clustering in a statistical indoor propagation model is found to have significant effects on the capacity of an array-to-array link or matrix channel. Effects of antenna spacing, Poisson homogeneity, block size, and transmit power allocation strategies are also considered.

Let (W, C) be an m-cycle system of order n and let Ω ⊂ W , |Ω| = v < n. We say that a handcuffed design (Ω,P) of order v and block size s (2 ≤ s ≤ m−1) is contained in (W, C) if for every p ∈ P there is an m-cycle c = (a1, a2, . . . , am) ∈ C such that: (1) p = [ak, ak+1, . . . , ak+s−1] for some k ∈ {1, 2, . . . ,m} (i.e. the (s− 1)-path p occurs in the m-cycle c); and (2) ak−1, ak+s ∈ Ω. Note...

If the blocks of a G DD(X,G,A) with block size 4, index 3 and type gu can be arranged into a (gu)/4 × (gu) array, such that: (1) the main diagonal consists of u empty subarrays of size g/4× g; (2) the blocks in each column form a partition of X\G for some G ∈ G, while the blocks in each row contains every element of X\G 3 times and no element of G for some G ∈ G, then the design is called a fra...

A regular graph design RGD(v; k; r) is a design on v points with blocks of size k and constant replication number r, such that any two points belong to either 1 or 1 +1 common blocks, for some constant 1. We investigate resolvable regular graph designs with block size 4. In particular we determine the spectrum of such designs for v 16.

A four-component reaction kinetics for the densities of mobile and non-excess sessile dislocations and of mobile and immobile disclinations is proposed to describe the mi-crostructure development under plastic deformation up to large strains. The densities of non-excess sessile dislocations and of immobile disclinations are connected to ow stress contributions. For the dislocation contribution,...

A (u, K, 1) packing design of order o, block size K, and index I is a collection of K-element subsets, called blocks of a set V such that every 2-subset of V occurs in at most 1 blocks. The packing problem is to determine the maximum number of blocks in a packing design. In this paper we solve the packing problem with K = 5, 1=8, 12, 16, and all positive integers o with the possible exceptions ...

A balanced ternary design of order v with block size three, index 2 and P2 = 1 is a collection of multi-subsets of size 3 (of type { x, y, z} or {x, x, y }) called blocks, in which each unordered pair of distinct elements occurs twice possibly in one block and in which each element is repeated in just one block. So there are precisely v blocks of type {x, x, y}. Necessarily v == 0 (mod 3). We d...

The IEEE 802.16 standard defines the ARQ mechanism as a part of the MAC layer. The functioning of the ARQ mechanism depends on a number of parameters. The IEEE 802.16 specification defines them but it does not provide concrete values and solutions. This paper studies the key features and parameters of the 802.16 ARQ mechanism. In particular, we consider a choice for the ARQ feedback type, an al...