F'art twelid Abram

Fost l-oħrajn, l-awtur jitkellem dwar dak il-post, Ur fejn twieled Abram, li fih saru tfittxijiet.N/

Dwar ktieb tagħna tal-knisja

Fost it-tifkiriet tal-qedem li jagħnu l-Mużew tal-Aula Capitularis tal-Birgu, hemm il-Ktieb tal-għana tal-Knisja.N/

Il-Palazz ta' l-Inkiżitur tal-Birgu

L-awtur jitkellem dwar il-Palazz tal-Inkwiżitur li jinsab fil-Birgu, u l-mod li bih l-Inkwiżizzjoni lokali kienet taħdem.N/

L-abbati tal-palazz tas-Sinjura Bettina

Dan l-artiklu hu dwar id-delitt tal-abbati fil-palazz tas-Sinjura Bettina u x-xniegħa li kienet tiġri li dan l-abbati jidher lin-nies.N/

Il-Kastell Sant'Anġlu

Dan l-artiklu hu dwar il-Kastell Sant’Anġlu tal-Birgu, fortifikazzjoni li kienet tħares il-Port il-Kbir mill-attakki tal-għadu. Jitkellem ukoll dwar il-Knisja ta’ Sant’Anġlu ddedikata lil Omm Alla, il-Knisja fil-quċċata taċ-Ċittadella ddedikata lil Sant’Anna u l-Palazz li jinsab fuq l-ogħla rampa ta’ Sant’Anġlu.N/

Il-Kastell Sant'Anġlu

Din hi informazzjoni storika dwar il-Kastell Sant’Anġlu tal-Birgu, wieħed mill-fortifikazzjonijiet li fost l-oħrajn kien jintuża biex iħares u jiddefendi l-Port il-Kbir mill-attakki tal-għadu.N/

Il-kappell u s-sejf ta' La Valette

Dan l-artiklu jittratta dwar il-kappell u s-sejf tal-Gran Mastru La Vallette.N/

Il-knisja ta' San Lawrenz tal-Birgu

Bħala parti mill-frak storiku, l-awtur xtaq jagħti tagħrif dwar il-Knisja ta’ San Lawrenz tal-Birgu.N/

Investigation of Dynamics of Self-Similarly Evolving Magnetic Clouds

Magnetic clouds (MCs) are "magnetized plasma clouds" moving in the solar wind. MCs transport magnetic flux and helicity away from the Sun. These structures are not stationary but feature temporal evolution. Commonly, simplified MC models are considered. The goal of the present study is to investigate the dynamics of more general, radially expanding MCs. They are considered as cylindrically symmetric magnetic structures with low plasma {\beta}. In order to study MC`evolution the self-similar approach method and a numerical approach are used. It is shown that the forces are balanced in the considered self-similarly evolving, cylindrically symmetric magnetic structures. Explicit analytical expressions for magnetic field, plasma velocity, density and pressure within MCs are derived. These solutions are characterized by conserved values of magnetic flux and helicity. We also investigate the dynamics of self-similarly evolving MCs by means of the numerical code "Graale". In addition, their expansion in a medium with higher density and higher plasma {\beta} is studied. It is shown that the physical parameters of the MCs maintain their self-similar character throughout their evolution. Conclusions. A comparison of the different self-similar and numerical solutions allows us to conclude that the evolving MCs are quite adequately described by our self-similar solutions - they retain their self-similar, coherent nature for quite a long time and over large distances from the Sun