In this paper, a conventional mushroom-type EBG unit cell is made compact by etching a C-slot at its conducting surface. Further, the C-slotted mushroom-type EBG unit cell is coupled with a microstrip line using a novel groove-coupling technique to design a notch filter. The arrangement has achieved in the reduction of the electrical size of the mushroom type EBG unit cell by 46:15% and create a stop band suppression of -12 dB. The proposed EBG is applied to notch a narrow band centered at 5:2 GHz along with an ultra-wideband antenna. The far field gain of the antenna is suppressed by -5:8 dBi along the direction of its major lobe at 5:2 GHz. The overall size of the antenna system is 19x27x1:6mm3 which is compact. The performance of the antenna is validated from the simulation and measured results.

In this study, microstructural and crystallographic properties of phase transformations occurring with thermal effect in Fe-XMn-Mo-Si (X = 15.14wt.% ve 18.45wt.%) alloys have been investigated. The effects of (wt.%) Mn rates in the alloy on the characteristics of phase transformations were investigated by using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-Ray Diffraction (XRD). SEM and TEM investigations was observed that two different martensite (ε and α') structures were formed in austenite grain. In addition, in TEM observations, the interface regions were selected over the bright field image. Crystallographic orientation relationships were obtained by the analyses of electron diffraction patterns from the interface regions. γ → α' type transformation was observed for α' particle formation, and orientation relationship was found as (1–11)γ // (011)α', [101]γ // [1–11–]α' and, γ → ε type transformation was observed for ε martensite plate formation, and the orientation relationship was found as (1–11–)γ // (0002–)ε, [1–1–0]γ // [2–110]ε. It was noticed that this orientation relationships were compatible with the literature (Kurdjumov-Sachs and Shoji-Nishiyama orientation relationship). Precipitation phase (carbide) formation was observed in microstructure analyses. The changes in the magnetic properties of the alloys having different rates of Mn as a consequence of thermal effect phase transformations was investigated by using Mössbauer Spectroscopy. The internal magnetic field, volume fractions (transformation rates), isomer shift values and magnetic characteristics of the main and product phases were revealed by Mössbauer Spectroscopy. In the Mössbauer Spectrum, it was noticed that ε-martensite and γ-austenite structures showed paramagnetic single-peak, and α'-martensite showed ferromagnetic six-peaks.

Communities of soil invertebrates were studied in 4 types of tundra ecosystems on Spitsbergen (Hornsund area) during the vegetative season of 1989. Taxonomic composition, density and biomass of soil fauna were evaluated in the sites along a gradient of increase in the biogenic impact of bird colonies, i.e. in polygonal tundra, mossy/lichenous tundra, Calliergon stramineum moss association, and mossy associations near a colony of Little Auks (Alle die). Average total biomass of soil invertebrates increased in this site sequence from 1.1 to 25.0 g wet weight x m-2 (mainly due to collembolans and nematodes). Seasonal dynamics of all groups of soil meso- and macrofauna (Nematoda, Enchytraeidae, Aranei, Acarina, Collembola, Coleoptera, Diptera larvae) is presented and discussed.

This publication begins series of papers on taxonomy of juvenile and little known Mesozoic gastropods from Siberia and Timan region (= Pechora Basin). First part contains general part with geological framework followed by the paleontological part on taxonomy of Vetigastropoda and Caenogastropoda (exclusive of Neogastropoda). Described are 15 species of gastropods. Three of them are new. They are Chuelskia siberica (Trochidae), Ageria gankinensis (Epitoniidae), and Dzikella chuzikovensis (superfamily and family uncertain). Moreover, described is a new genus Chuelskia (Trochidae). Eight species are left in the open nomenclature. The Siberian gastropods belong mostly to the cosmopolitan fauna while the gastropods of Timan region are the same as those already described from Novaja Zemlja Islands.

The results of the detailed seismoacoustic profilling (CSP, boomar) are presented. The investigation has been carried out in February 1985 and 1988 during two Geodynamical Expeditions organized by the Institute of Geophysics of the Polish Academy of Sciences. The boomar penetration of the caldera floor went down to 150 msec. Four seismoacoustic units of volcanic formations have been determined. The unit A corresponds to pre-caldera series and occurred only in the border part of the flooded caldera. The unit contains mainly pyroclastic rocks (consolidated agglomerates and tuffs) and probably some intercalations of lavas. The units B, C and D fill up the caldera bottom and correspond to post-caldera series. The units are composed of pyroclastic rocks, containing also materials redeposited by lahars, glaciers, landwaters and by wind. The units C and D (the youngest one) were certainly deposited under water. All the units are cut by numerous faults, vents and other types of intrusions. The larger faults, en echelon type, are situated around the bottom and form a ring-fracture. Caldera was formed by succesive stages of collapsing. This process is not finished yet and volcanic activity is still alive (especially in the western part of the flooded caldera).

The aim of geological investigations the results of which are given in this paper was identify the presence of Carboniferous coal in the area south of Homsund (Figs. 1 and 2). The field investigations were carried out in the summer of 1979 within the scientific expedition organized by the Institute of Geophysics of the Polish Academy of Sciences (problem MR-II-16/B). The investigations covered the northwestern part of Sörkappland, south of Hornsund and west of the Wurmbrandegga and Wiederfjellet (Fig. 2).

The text is dedicated to the outstanding Polish researcher of proper names — prof. Aleksandra Cieślikowa, author and co-author of many significant monographs and onomasticons, which went beyond the limits of previous onomastic studies. The most important, selected her scientific achievements and expert activities at the Polish Language Council and the Commission on Names of Localities and Physiographic Objects were presented.

The transformation of the former docks in Dublin was one of the major urban regeneration projects in Ireland, which was built during the recent economic boom. Since the start of the project in the nineties, more than six thousand apartments have been built in the area. The construction of the apartments allowed for the diversifi cation of the character of this district into a living quarter. Initially the Docklands were considered as an offi ce district that would serve the Ireland’s service-based economy. New projects also allowed for the development of housing in a close proximity to existing city centre, although it did not happen not without avoiding the gentrifi cation and social polarization of this area.

The key role in the process was played by the operator – the urban development agency (Dublin Docklands Development Authority). It acted both as a strategic landowner and the coordinator of the development. The agency was responsible for the delivery of the infrastructure and the sale of the land. The actions of the operator included setting up the of the housing standards, requirements for the development of the infrastructure, both social and technical and public transportation systems. In the hindsight, the agency was praised for the management of the development of such large site. On the other hand, the lack of procedural oversight and a few dubious fi nancial decisions, as well as the other eff ects of the neoliberal policies, such as gentrification, fi nally lower the assessment of DDDA efficiency in that matter.

The article summarizes the main aims and achievements of the DDDA’s development policy and its assessment from the long-term perspective of two decades of transformation. This includes the eff ects of the actions in the aftermath of the fi nancial crisis. Such perspective allows to highlight the various stages of the development of the agency and to examine the efficiency and efficacy of these actions.

The article presents Model Integration of Immigrants in Gdańsk in the field of education, based on two years of experience of schools, local government institutions and social organizations involved in the creation of conditions for the education of immigrants. & e foreign pupils, defined as “someone else”, not belonging to the community of “our”, are not the subject of educational policy, but immediately a} er crossing the threshold of schools become its object. The law and school practices define their place in the system, that becomes a huge challenge for both teachers and for students themselves and their parents. Gdańsk way to develop urban educational policy for immigrants led from intervention by the diagnosis of problems and learning from others, to seek their own innovative solutions.

Cities play a special role in the process of sustainable development of the country. The city management plays a fundamental role in this challenge. The mayor should become a manager and manage the city based on a strategic marketing management model. Thanks to this, it can optimally use available financial instruments that give the opportunity to achieve strategic development goals of the city.

Passive autocatalytic recombiners (PAR) is the only used method for hydrogen removal from the containment buildings in modern nuclear reactors. Numerical models of such devices, based on the CFD approach, are the subject of this paper. The models may be coupled with two types of computer codes: the lumped parameter codes, and the computational fluid dynamics codes. This work deals with 2D numerical model of PAR and its validation. Gaseous hydrogen may be generated in water nuclear reactor systems in a course of a severe accident with core overheating. Therefore, a risk of its uncontrolled combustion appears which may be destructive to the containment structure.