Article deals with the problem of technology selection for construction project. Three criteria were proposed: cost, time and technological complexity. To solve the problem, fuzzy preference relations were used. Authors present an algorithm supporting multi-criteria decision-making process. The algorithm creates fuzzy preference relations on the basis of the fuzzy comparison: “xᵢ is better than xj”.Then, with the use of criteria weights it creates general fuzzy preference relation, finds all non-dominated (admissible) alternatives and the best one among them. The algorithm consists of 7 steps. Authors show application of the proposed algorithm – example calculations.
During the planning and controlling of the construction process, most attention is focu sed on risk analysis, especially in the context of final costs and deadlines of the investment. In this analysis, the primary and most significant concern is the proper identification and quantification of events, which on a certain level of probability may affect the development process. This paper presents the result of a risk analysis for a particular building object, made after completion of the investment and accepting it for use. Knowledge of the planned values and the actual investment process allowed for the identification of the events and their effects that in this case have significantly disrupted the investment process. The limited total cost of the investment project in question had a considerable impact on the progress of the project execution. Despite three transitions of administrative procedures, the opening date of the shopping centre was delayed by only three weeks.
In the Polish spatial planning law one of basic principles is to preserve spatial order. However, the analysis of the law and its implementation show, that instead of spatial order, overall circumstances promote disorder. The analysis covers the law adopted in 2018, which aimed at boosting the development of housing. Findings show, that the new law may rather promote chaos in urban space. One of the drawbacks is undermining of the spatial order by creating the possibility of adopting resolutions pertaining to housing and accompanying services, that are contradictory to provisions of master plans.
The starting point of the study on the problems, dilemmas and hopes for effective implementation of revitalization projects in Polish cities was the conviction that revitalization is one of the processes affecting the development and changes in the spatial and functional fabric of cities. Revitalization is defined as a deliberate and purposeful process, the effect of which is to restore life in the dysfunctional and degraded parts of cities. Taking up such a topic required an answer to the question about the nature of revitalization and its aspects. The focus of the study was on the problems of revitalization that stem from the legal and socio-economic situation and the dilemmas faced by local government authorities of Polish cities. The introduction to these considerations is the brief outline of the revitalization of Polish cities in the period after World War II, while the conclusion deals with the fears and hopes related to revitalization activities that are presently initiated. The discussion takes into account the existing, critically assessed, legal regulations on revitalization.
This paper presents optimisation of a measuring probe path in inspecting the prismatic parts on a CMM. The optimisation model is based on: (i) the mathematical model that establishes an initial collision-free path presented by a set of points, and (ii) the solution of Travelling Salesman Problem (TSP) obtained with Ant Colony Optimisation (ACO). In order to solve TSP, an ACO algorithm that aims to find the shortest path of ant colony movement (i.e. the optimised path) is applied. Then, the optimised path is compared with the measuring path obtained with online programming on CMM ZEISS UMM500 and with the measuring path obtained in the CMM inspection module of Pro/ENGINEER® software. The results of comparing the optimised path with the other two generated paths show that the optimised path is at least 20% shorter than the path obtained by on-line programming on CMM ZEISS UMM500, and at least 10% shorter than the path obtained by using the CMM module in Pro/ENGINEER®.
The first post-war, comprehensive Gdynia Downtown Plan was at the same time one of the first spatial development plans in Poland defining the directions of transformation of multifunctional downtown structures in the new system and legal realities. It was the Plan of the Polish Breakthrough related to the realities of the downtown area of Gdynia. The study area included the Gdynia Valley limited by the hills of Kamienna Góra, Redłowo and Chylońskie Forests with the development of a complete pre-war city developing in accordance with the fi rst plan of Adam Kuncewicz from 1925 in the zone of 3 km, counted from the center of the inner port. The aim of the plan was to look for centralizing potential in the fi eld of research. This concept was treated as a power degree related to the then existing state, as well as the possibility of further development or transformation.
This paper presents a synthesis of research in the field of social activity in development of urban public spaces. Interest in social participation in which many groups sees a remedy to the problems of the city - including spatial chaos - has many causes. One of them is the lack of trust in the social side to the profession of architecture. The article indicates the possible cause of this state for which it was flawed legislation and the planning system, which in practice is not conducive to the formation of order, harmony and beauty, but facilitate the implementation of the narrow groups of interests, bringing the rank of designer as creator of the role of the investor's decision executor.
The basic resource of urban planning is space, which as a result of transformation has a direct impact on socio-economic development and quality of life. The author’s purpose was to define planning solutions for urban spatial policy, which can raise the quality of living, especially in the residential environment. In connection with the above, the literature of the subject was analysed and examples of good spatial policy and urban development in the living environment were shown. Particular attention was paid to the planning solutions in Paris and Vienna, as well as to the examples of the new living environment creation in some Scandinavian cities.
Maritime spatial planning is quite a new field that emerged as an idea only after 2000, with the first practical implementation after 2010. In Polish legislation, the first entries regarding the possibilities of this type of planning appeared in 2003. For the next ten years resources of necessary knowledge and human competences had been created. In this way, a considerable amount of knowledge in the field of maritime spatial planning was accumulated in Poland, and our country has become one of the leaders in scientific research in this field. Poland has enriched the MSP methodology and has proposed many new and pioneering solutions. In 2016, the Directors of Maritime Offices began developing a coherent draft of maritime spatial plan for Polish maritime areas in the part relating to the exclusive economic zone, the territorial sea and parts of internal sea waters (including the Gulf of Gdańsk) on a scale of 1: 200,000. The work on the preparation of this draft plan was coordinated on behalf of all offices by the Director of the Maritime Office in Gdynia, and the work was assigned to a Consortium consisting of the Maritime Institute in Gdańsk and the Maritime Fisheries Institute – National Research Institute in Gdynia. The Polish plan is included in the top ten plans in the world and is one of the first to have a decision-making and not indicative character. The Polish planning process has resulted in the development of many innovative solutions that are worth wider dissemination. The presented study aims to identify key problems and formulate conclusions regarding spatial planning of Polish maritime areas, as well as to propose the most important directions for further planning work. The analytical material that is the subject of the study are experience and solutions adopted in our country for maritime spatial planning.
The subject discussed in this paper is the evolution of the ideas of organic development in urban planning, focused on the waterfront areas. The paper also aims to analyze and interpret current trends in urban water waterfront planning, which are infl uenced by the contemporary ideas related to environmental issues, landscape planning, new technologies in the fi eld of building design and civil- and hydroengineering or application of the renewable energy sources.
The main purpose of this article is to present facts related to the history of Port Praski located on the right bank of the Vistula river in Warsaw, which is currently being built. The subject of the consideration is the area and development of the former Port Praski, which project and the fi rst works began after the First World War. It’s spatial and functional connections with the downtown area and surroundings are also key issue. The article presents plans, concepts, projects and investments, furthermore theirs level of implementation. Signifi cant eff ort was made to answer the research questions concerning social expectations regarding the function and the direction of Port Praski development. In the final part of the article was made a comparison of existing revitalization works in Port Praski with HafenCity – the district of Hamburg, where the revitalization project has been already implemented for 20 years. However, comparative analysis revealed several signifi cant differences, allowed to conclude that Polish model of revitalization is only a partially identical with the approach applied in Western Europe.
The article attempts a comparison of two harbor districts, in Gdansk and in Hamburg. In 2013, a multiannual program - IBA Hamburg (International Building Exhibition) - was completed. The IBA, initiated with the a concept of the Leap over the Elbe River, part of the Growing City development agenda, addressed the problem of restructuring the port-nearby zones in Harburg and Wilhelmsburg, which have been recognised as areas of high potential in metropolitan development. The concept of metrozones (intra-peripheries or intra border zones), similarly to the term in-between City (German: Zwischenstadt), describes the current problems associated with the strive for creation of an original, but efficient and compact European city. Restructuring of the harbor districts enables new development of the urbanized, but never planned as urban space, areas. Shaped in accordance with the technological capabilities and with the regulation standards and norms of the second half of the 20th century, nowadays the areas form the resultative landscape, burdened with the image of an unfriendly or even dangerous zones. In the era of high technology, metrozones are becoming valuable intra-city developmental areas, opened to alternative urban programs, avoiding the homogenising global trends. In connection with the above, the article describes the situation of the area organized around Nowy Port in Gdansk.