Objective(s): The structure- activity relationship of a series of 36 molecules, showing L-type calcium channel blocking was studied using a QSAR (quantitative structure–activity relationship) method. Materials and Methods: Structures were optimized by the semi-empirical AM1 quantum-chemical method which was also used to find structure-calcium channel blocking activity trends. Several types of ...

We prove a lower bound on the optimal price for a fairly large class of blocking systems with general arrival and service processes, determine optimal price expressions for M/M/1/m and M/GI/s/s systems, and investigate how optimal prices change with changes in the size of the waiting room and service

A proper double blocking set in PG(2, p) is a set B of points such that 2 |B ∩ l| (p + 1) − 2 for each line l. The smallest known example of a proper double blocking set in PG(2, p) for large primes p is the disjoint union of two projective triangles of side (p+ 3)/2; the size of this set is 3p+ 3. For each prime p 11 such that p ≡ 3 (mod 4) we construct a proper double blocking set with 3p + 1...

In this paper, the influence of heat treatment on PH17-7 stainless steel spring was evaluated. Precipitation hardening phenomenon of  PH 17-7 steel was evaluated in three stages. First, the spring constant changes with time and temperature was evaluated. Second, the spring constant changes with respect to its original length at constant temperature and time with blocking (spring length aft...

We prove that a small blocking set of PG(2, q) is “very close” to be a linear blocking set over some subfield GF(p) < GF(q). This implies that (i) a similar result holds in PG(n, q) for small blocking sets with respect to k-dimensional subspaces (0 ≤ k ≤ n) and (ii) most of the intervals in the interval-theorems of Szőnyi and Szőnyi-Weiner are empty.

In this paper, we show that a small minimal blocking set with exponent e in PG(n, pt), p prime, spanning a (t/e − 1)-dimensional space, is an Fpe-linear set, provided that p > 5(t/e)− 11. As a corollary, we get that all small minimal blocking sets in PG(n, pt), p prime, p > 5t−11, spanning a (t−1)-dimensional space, are Fp-linear, hence confirming the linearity conjecture for blocking sets in t...

In this paper some relations between finite geometric spaces and cooperative games are considered. In particular by some recent results on blocking sets we have new results on blocking coalitions. Finally we introduce a new research field on the possible relations between quasihypergroups and cooperative games.

Atmospheric blockings and their impacts on wintertime surface air temperature in East Asia are investigated by using three blocking indices. Blockings two specific regions that indirectly or directly modulate Asian climate variability analyzed: Ural (UR) over Asia’s northwest Okhotsk (OK) northeast. Both lead to cold anomalies but through slightly different mechanisms. In the typical case of UR...