a group $g$ is called metahamiltonian if all its non-abelian subgroups are normal‎. ‎the aim of this paper is to provide an updated survey of research concerning certain classes of generalized metahamiltonian groups‎, ‎in various contexts‎, ‎and to prove some new results‎. ‎some open problems are listed‎.

We study the decay behaviors of fully bottom tetraquark states within diquark-antidiquark picture and calculate their relative branching ratios through Fierz rearrangement. Our results suggest that $C=+$ can be searched for in ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}\mathrm{\ensuremath{\Upsilon}}(1S)$ ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}\mathrm{\ensuremat...

In this work, we calculate the higher mass spectra for $2S$- and $1D$-wave fully-charmed fully-bottom tetraquark states in a nonrelativistic potential quark model. The $2S$-wave fully-charmed/bottom lie range of $\ensuremath{\sim}(6.9,7.1)/(19.7,19.9)\text{ }\mathrm{GeV}$, apart from highest ${0}^{++}$ state ${T}_{(cc\overline{c}\overline{c}){0}^{++}}(7185)/{T}_{(bb\overline{b}\overline{b}){0}^...

Livestock market participation is an important way to improve the livelihoods and income of smallholder farmers in Southwest Ethiopia. Although it plays role, livestock producers do not fully participate market. The purpose this study was investigate factors that influence intensity To analyze result, descriptive statistics Poisson regression analysis were used. results showed 65.4% respondents...

In this paper, condition monitoring of a geared rotor system using finite element (FE) model updating and particle swarm optimization (PSO) method is onsidered. For this purpose, employing experimental data from the geared rotor system, an updated FE model is obtained. The geared rotor system under study consists of two shafts, four bearings, and two gears. To get the experimental data,  iezoel...

the ichneumonidae fauna of kerman province, iran, was surveyed in april 2013 to june 2014. in total, 35 species belonging to 22 genera and eight subfamilies were collected and identified, of which cryptus armator fabricius, 1804; enizemum schwarzi diller, 1987 and barichneumon gaullei berthoumieu, 1903 are new records for thefauna of iran. an updated list of ichneumonid species for kerman provi...