Wyniki wyszukiwania dla: : VISUAL COMMUNICATION, FREEHAND DRAWING, DIGITAL DRAWING, DIGITAL DESIGN TOOLS - MOST Wiedzy

Wyszukiwarka

Wyniki wyszukiwania dla: : VISUAL COMMUNICATION, FREEHAND DRAWING, DIGITAL DRAWING, DIGITAL DESIGN TOOLS

Wyniki wyszukiwania dla: : VISUAL COMMUNICATION, FREEHAND DRAWING, DIGITAL DRAWING, DIGITAL DESIGN TOOLS

  • Hybrid‐mode single‐slope ADC with improved linearity and reduced conversion time for CMOS image sensors

    In the paper, a single‐slope analog‐to‐digital converter (ADC) for integrated CMOS image sensor applications with an improved technique of conversion has been proposed. The proposed hybrid‐mode ADC automatically uses one of the following conversion techniques: time based (i.e. PWM) or voltage based (i.e. single‐slope). During the ADC operation, the clock frequency and reference voltage are modified in order to reduce the conversion...

    Pełny tekst do pobrania w portalu

  • Contactless hearing aid designed for infants

    It is a well known fact that language development through home intervention for a hearing-impaired infant should start in the early months of a newborn baby's life. The aim of this paper is to present a concept of a contactless digital hearing aid designed especially for infants. In contrast to all typical wearable hearing aid solutions (ITC, ITE, BTE), the proposed device is mounted in the infant's bed with any parts of its set-up...

    Pełny tekst do pobrania w portalu

  • Security of Cryptocurrencies: A View on the State-of-the-Art Research and Current Developments

    Publikacja

    - SENSORS - Rok 2023

    [Context] The goal of security is to protect digital assets, devices, and services from being disrupted, exploited or stolen by unauthorized users. It is also about having reliable information available at the right time. [Motivation] Since the inception in 2009 of the first cryptocurrency, few studies have been undertaken to analyze and review the state-of-the-art research and current developments with respect to the security...

    Pełny tekst do pobrania w portalu

  • Visual Capacity Assessment of the Open Landscape in Terms of Protection and Shaping: Case Study of a Village in Poland

    Publikacja

    - Sustainability - Rok 2020

    This article describes the methodology and results of research on landscape visual capacity. The aim of the project was to develop a tool that would support planning and design decisions at the level of communal management in rural areas in Poland through systematic application of visual criteria. Their importance in the protection, management and shaping of space is underlined by the document produced at the European Landscape...

    Pełny tekst do pobrania w portalu

  • AN INTELLIGENT SYSTEM TO SUPPORT THE DESIGN PROCESS OF HYBRID PHOTOVOLTAIC INSTALLATIONS

    Publikacja

    - Rok 2014

    The paper presents the final version of intelligent system to support the design process of hybrid photovoltaic systems supported by fuel cells and / or thermoelectric generators developed and constructed at the Institute of Electron Technology, as well as to conduct experiments and research. A block diagram of the system and the selection of its components is described and discussed. The paper considers the availability of the...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Artificial intelligence in architectural education - green campus development research

    The rapid advancement of artificial intelligence (AI) technologies has introduced new possibilities and challenges in design education. This article explores the need for changes and adaptations in the teaching process of design as AI-related technologies, based on image generation, transform the creative process and offer novel opportunities. In a research-by-design studio in an architectural faculty in Poland, students who utilised...

    Pełny tekst do pobrania w portalu

  • Effect of GIS parameters on modelling runoff from river basin. The case study of catchment in the Puck District

    The study was preceded to check the impact of the adopted digital elevation model resolution on the determination of catchment parameters and the further influence of the received information on calculations related to the hydrograph at the closing point of the basin after a synthetic 100-year precipitation episode. The study area are river basins located in the Puck commune convoying water directly to the Puck Bay. These studies...

    Pełny tekst do pobrania w portalu

  • Jerzy Proficz dr hab. inż.

    Jerzy Proficz – dyrektor Centrum Informatycznego Trójmiejskiej Akademickiej Sieci Komputerowej (CI TASK) na Politechnice Gdańskiej. Uzyskał stopień naukowy doktora habilitowanego (2022) w dyscyplinie: Informatyka techniczna i telekomunikacja. Autor i współautor ponad 50 artykułów w czasopismach i na konferencjach naukowych związanych głównie z równoległym przetwarzaniem danych na komputerach dużej mocy (HPC, chmura obliczeniowa). Udział...

  • Hanna Gaweł

    Osoby

    Hanna Gawel is a Doctoral Student of the Doctoral School in the Social Sciences in the discipline of Social Communication and Media at Jagiellonian University. Hanna’s research focuses on knowledge, information management and the influence of well-served information in different formats on society.  She is currently writing a PhD thesis about how information pollutants affect information regarding air quality in Polish metropolises....

  • Art Workshop III

    Kursy Online
    • Ł. Ławrynowicz
    • E. Urwanowicz
    • P. Sasin
    • K. Wróblewski

    Exploring the influence of light on form and space. Developing the ability to synthesise on the basis of analysis of phenomena and forms observed in nature. To become familiar with the basic elements of the sculpture workshop. Examples of issues: contrast of light and shadow; drawing study of light based on observation of a single object, light in interiors and architectural space; painting, sculpture: bust - interpretation;...

  • Artificial Intelligence Aided Architectural Design

    Publikacja

    Tools and methods used by architects always had an impact on the way building were designed. With the change in design methods and new approaches towards creation process, they became more than ever before crucial elements of the creation process. The automation of architects work has started with computational functions that were introduced to traditional computer-aided design tools. Nowadays architects tend to use specified tools...

    Pełny tekst do pobrania w portalu

  • Hybrid Laboratory of Radio Communication With Online Simulators and Remote Access

    Contribution: Two toolsets for the remote teaching of radio communication laboratory classes: 1) online simulators for individual work of students and 2) a remote access system to laboratory workstations for group work. Initial assumptions and method of implementation of both tools are presented. Background: The COVID-19 pandemic has forced a change in teaching at all levels of education. The specificity of practical classes, such...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • The Changing Nature of In‐Between Spaces in the Transformation Process of Cities

    Publikacja

    In the in‐between spaces of cities, there are many problems of various nature and scale: functional, spatial, economic, environmental, visual, and social. There are also some hidden potentials that can be activated. The aim of the article is to explore the possibilities of solving existing problems and to show the possibilities of using the potentials of in‐between spaces with regard to the changing nature of a city. The article,...

    Pełny tekst do pobrania w portalu

  • A study on signal processing methods applied to hearing aids

    Publikacja

    - Rok 2016

    This paper presents a short survey on current technology available in hearing aids with a focus on digital signal processing techniques used. First, factors influencing the hearing aid effectiveness are introduced. Then, examples of the present DSP methods and strategies are provided. Also, a description of current limitations of hearing aids and future trends of development are shown. Finally, the notion of computational auditory...

  • BADANIE JAKOŚCI TRANSMISJI W SYSTEMACH RADIOFONII CYFROWEJ DAB I DAB+

    W dobie mediów cyfrowych kluczowym elementem jest dostarczanie treści wysokiej jakości. Wśród systemów radiofonii cyfrowej do najpopularniejszych należą standardy DAB i DAB+ (Digital Audio Broadcasting). Przy konfiguracji multipleksu ważne jest właściwe zarządzanie zasobami w ramach pojedynczego kanału radiowego. W artykule przedstawiono wyniki badań subiektywnych, dotyczących jakości transmisji w systemach DAB i DAB+, przeprowadzonych...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Errors of a Linear Current Approximation in High-Speed PMSM Drives

    Current sampling techniques and predictive algorithms used in the digital control of electric drives rely on a simple mathematical model that assumes linear current changes upon constant supplying voltages. This paper identifies rotor movement as a factor that makes this assumption invalid when the rotor covers an angular distance of a few tens of degrees during the control interval duration. The errors of the linear current approximation...

    Pełny tekst do pobrania w portalu

  • What Skills for Multi-Partner Open Innovation Projects? Open Innovation Competence Profile in a Cluster Ecosystem Context

    Publikacja

    Industry 4.0 and the turbulent environment have rendered increasing interest in open inno- vation that extends from the bilateral transmission of expertise to multilateral platform collaborations. Open innovation ventures are seen as intricate collaborations that require the commitment of numer- ous partners during the lifetime of the project. In order to examine the specific competence of open innovation teams, we set the research...

    Pełny tekst do pobrania w portalu

  • Reshaping financial systems: The role of ICT in the diffusion of financial innovations – Recent evidence from European countries

    Exchange-traded funds (ETFs) are among the fastest-growing types of innovative financial products. The emergence and spread of these instruments have been facilitated by the digital revolution. Information and communication technology (ICT) is profoundly reshaping the global economic landscape, laying solid foundations for unrestricted and unbounded flows of information and knowledge, eliminating information asymmetries, and furthering...

    Pełny tekst do pobrania w portalu

  • The evaluation of eGlasses eye tracking module as an extension for Scratch

    In this paper we present the possibility of using eGlasses eye tracking module as an extension for Scratch programming tool which is a visual programming language supporting computer skills learning. The main concept behind this project is to setup the interface for rapid interaction design. Eye tracking is a powerful tool for hands free communication but for that requires a dedicated software. This software is rarely tailored...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Jakub Jan Chabik dr inż.

    Biogram Jakub Chabik jest absolwentem Politechniki Wrocławiskiej oraz studiów MBA na Uniwersytecie Ekonomicznym w Poznaniu. Posiada stopień naukowy doktora zarządzania. Kariera zawodowa Od 30 lat pracuje w międzynarodowych firmach na stanowiskach związanych z technologiami informatycznymi i zarządzaniem. W przesżłości prowadził projekt połaczenia dwóch instytucji finansowych, prowadząc fundamentalną zmianę kulturową w okresie szybkiego...

  • The AC motor voltage and audible noise waveforms in ship’s electrical drive systems with frequency converters

    Dane Badawcze
    open access

    The presented dataset is part of research focusing on the impact of the ship's electrical drive systems with frequency converters on vibrations and the level of audible noise on ships.

  • AMO perspectives on the well-being of neurodivergent human capital

    Publikacja

    - Employee Relations - Rok 2021

    Existing management research and management practices frequently overlook the relationship between the above-average human capital of highly functioning neurodivergent employees, their subjective well-being in the workplace and performance outcomes. This paper calls for greater attention to the hidden human capital associated with neurodiversity by mainstreaming implementation of neurodiversity-friendly policies and practices. Drawing...

    Pełny tekst do pobrania w portalu

  • Communication Platform for Evaluation of Transmitted Speech Quality

    A voice communication system designed and implemented is described. The purpose of the presented platform was to enable a series of experiments related to the quality assessment of algorithms used in the coding and transmitting of speech. The system is equipped with tools for recording signals at each stage of processing, making it possible to subject them to subjective assessments by listening tests or, objective evaluation employing...

    Pełny tekst do pobrania w portalu

  • The use of GIS tools for road infrastructure safety management

    There are many factors that influence accidents and their severity. They can be grouped within the system of man, vehicle and environment. The article focuses on how GIS tools can be used to manage road infrastructure safety. To ensure a better understanding and identification of road factors, GIS tools help with the acquisition of road parameter data. Their other role is helping with a clear and effective presentation of risk...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Light4Health eLearning Course: health research for interior lighting design. Re-thinking design approaches based on science

    Publikacja

    This paper presents the results of 'Light4Health' (L4H), a three-year EU Erasmus+ Strategic Partnership grant project (2019-2021), which investigated, systematized and taught health-related research on the impact of natural and artificial light on human health and well-being relevant to indoor lighting design. The objective was to re-think evidence-based lighting design approaches for residential, working/educational, and healthcare...

    Pełny tekst do pobrania w portalu

  • Full-field in vivo experimental study of the strains of a breathing human abdominal wall with intra-abdominal pressure variation

    Publikacja

    The presented study aims to assess the mechanical behaviour of the anterior abdominal wall based on an in vivo experiment on humans. Full-field measurement of abdominal wall displacement during changes of intra-abdominal pressure is performed using a digital image correlation (DIC) system. Continuous measurement in time enables the observation of changes in the strain field during breathing. The understanding of the mechanical...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Architectural project I 2024/25

    Kursy Online
    • J. Krenz
    • M. Wojtkiewicz

    Our course aims to teach you the basics how to design architecture. The process of architectural design is not only about function and construction. It is about creating an original form with individual features and beauty that will become a meaningful part of our environment. Our course in architectural design is based on the connection with ART. We follow the tradition of the famous Bauhaus school, where architects and artists...

  • Fake News: Possibility of Identification in Post-Truth Media Ecology System

    Publikacja

    - Rok 2019

    Information comes as basic good which affects social well-being. A modern society and a modern state – its administration, education, culture, national economy and armed forces – cannot function efficiently without a rationally developed field of information. The quality of the functioning of that system depends on a specific feature of information, that is namely: its reliability which makes it possible for us to evaluate accuracy,...

    Pełny tekst do pobrania w portalu

  • Open standards-based communication system for distributed intelligent surveillance solution

    The paper presents an open standards-based communication system being a part of a distributed surveillance solution. The paradigm of “intelligent” surveillance approach is introduced, and employed video processing is discussed briefly. Requirements analysis toward the design of communication subsystem architecture is presented. Special attention is paid to the multimedia streaming functionality of presented solution, which is based...

  • CAD. Integrated Architectural Design, BSc Arch (2024/25)

    Kursy Online
    • D. Cyparski

    The programme will provide students with a solid grounding in BIM (Building Information Modelling) using Autodesk's Revit Architecture. Students will review the advanced features of Revit for Architecture, a tool to support BIM (Building Information Modelling) and delivery of 3D digital models and related documentation. The lesson plans will specifically introduce students to common workflows and problem-solving skills while creating...

  • Multidisciplinary approach to the assessment of historic structures based on the case of a masonry bridge in Galicia (Spain)

    Publikacja

    - COMPUTERS & CHEMICAL ENGINEERING - Rok 2011

    The paper presents a general method to evaluate a masonry structure with a complex geometry and unknown material properties. This multidisciplinary approach integrates close range digital photogrammetry,ground probing radar (GPR) and finite elements analysis (FEM) to analyse a masonry bridge. The resulting information from photogrammetry and radar is applied to define a 3D model, which is then used to simulate the behaviour of...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • From Regenerative Buildings to Regenerative Urban Projects: Design frameworks to scale up within the area of regenerative practice

    Publikacja

    - Rok 2021

    In this chapter, a discussion will be presented of design frameworks and assessment tools that are useful for boosting the scale jumping of regenerative design practices and the paradigm shift. Our main objectives will be to identify existing design and assessment frameworks, to describe the way they work and how they can contribute to scale-jumping regenerative design, as well as to identify shortcomings and opportunities. We...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Implementation of Addition and Subtraction Operations in Multiple Precision Arithmetic

    Publikacja

    - Rok 2019

    In this paper, we present a digital circuit of arithmetic unit implementing addition and subtraction operations in multiple-precision arithmetic (MPA). This adder-subtractor unit is a part of MPA coprocessor supporting and offloading the central processing unit (CPU) in computations requiring precision higher than 32/64 bits. Although addition and subtraction operations of two n-digit numbers require O(n) operations, the efficient...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Coupling of Blood Pressure and Subarachnoid Space Oscillations at Cardiac Frequency Evoked by Handgrip and Cold Tests: A Bispectral Analysis

    Publikacja
    • M. Gruszecki
    • Y. Tkachenko
    • J. Kot
    • M. Radkowski
    • A. Gruszecka
    • K. Basiński
    • M. Waskow
    • W. Gumiński
    • J. Anand
    • J. Wtorek... i 3 innych

    - Advances in Experimental Medicine and Biology - Rok 2019

    The aim of the study was to assess blood pressure–subarachnoid space (BP–SAS) width coupling properties using time–frequency bispectral analysis based on wavelet transforms during handgrip and cold tests. The experiments were performed on a group of 16 healthy subjects (F/M; 7/9) of the mean age 27.2 ± 6.8 years and body mass index of 23.8 ± 4.1 kg/m². The sequence of challenges was first handgrip and then cold test. The handgrip...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Public spaces connecting cities. Green and Blue Infrastructures potential.

    Publikacja

    A city fragmentation causes a lot of negative effects in urban environment such as: disconnecting the environmental, functional and compositional relations, a loss of urban compactness, chaotic development, visual chaos, a domination of technical landscape, reduction of security. This is why one of main challenges for urban planners is to connect the fragmented structures by creating friendly, attractive and safe public space....

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Linux scheduler improvement for time demanding network applications, running on Communication Platform Systems

    Communication Platform Systems as ex. ATCA standard blades located in standardized chassis provides high level communication services between system peripherals. Each ATCA blade brings dedicated functionality to the system but can as well exist as separated host responsible for servicing set of task. According to platform philosophy these parts of system can be quite independent against another solutions provided by competitors....

    Pełny tekst do pobrania w portalu

  • Grzegorz Szwoch dr hab. inż.

    Grzegorz Szwoch urodził się w 1972 roku w Gdańsku. W latach 1991-1996 studiował na wydziale Elektroniki Politechniki Gdańskiej. W roku 1996 ukończył studia w Zakładzie Inżynierii Dźwięku (obecnie Katedra Systemów Multimedialnych), broniąc pracę dyplomową pt. Modelowanie fizyczne wybranych instrumentów muzycznych. W tym samym roku dołączył do zespołu badawczego Katedry jako uczestnik Studium Doktoranckiego. Od stycznia 2001 roku...

  • New Materiality-towards ‘Media Environments

    Article presents media solutions providing new materiality of architectural spaces. Media solutions in architecture evolve in new forms. Articlepresentsboth the developmentof new technological solutionsas well as new ways of application of media solutions in relation toarchitectural form. The aim of the article is to show technical aspects of new materiality - intelligent materials, allowing transmission of changeable visual content...

    Pełny tekst do pobrania w portalu

  • Games and play with light in architecture

    The paper deals with the issue of the influence of daylight on the creation of architecture in the view of designers` play with light in the architectural space. Using the examples of contemporary realizations of some art museums, the work demonstrates the impact of exploration and experimentation conducted by the creators of visual arts on the design styles and architectural solutions. It also reveals the historical continuity...

    Pełny tekst do pobrania w portalu

  • Miscanthus × giganteus growth and photosynthetic rate measurements

    Dane Badawcze
    open access

    This data set contains the findings of the growth development, gas exchange, and specific leaf area of the plants during the experiment in which straw and wood chips-based biochars were used as soil amendment for Miscanthus × giganteus (M×g) cultivation.

  • Badanie stanu nawierzchni drogowej z wykorzystaniem uczenia maszynowego

    W artykule opisano budowę systemu informowania o stanie nawierzchni drogowej z wykorzystaniem metod cyfrowego przetwarzania obrazów oraz uczenia maszynowego. Efektem wykonanych prac badawczych jest eksperymentalna platforma, pozwalająca na rejestrację uszkodzeń na drogach, system do analizy, przetwarzania i klasyfikacji danych oraz webowa aplikacja użytkownika do przeglądu stanu nawierzchni w wybranej lokalizacji.

    Pełny tekst do pobrania w portalu

  • Wykorzystanie mediów społecznościowych do promocji otwartości w badaniach naukowych na przykładzie Biblioteki Politechniki Gdańskiej

    Publikacja

    - Rok 2021

    Media społecznościowe są jednym ze sposobów na skuteczną promocję zasobów oraz usług bibliotecznych w obecnym świecie cyfrowym. Stanowią również niedocenianą możliwość komunikacji pomiędzy naukowcami, bibliotekarzami a czytelnikami. Biblioteka akademicka może aktywnie angażować się w proces upowszechniania dorobku naukowego uczelni, podejmując w tym celu różnorakie działania marketingowe, wykorzystując takie serwisy jak: Facebook,...

    Pełny tekst do pobrania w portalu

  • Tworzenie miejskości po 1990r., Geneza niemieckiej urbanistyki współczesnych założeń mieszkaniowych

    Artykuł jest przyczyną do przypomnienia genezy współczesnej formy niemieckich miejskich struktur mieszkaniowych w kontekście zmian rozumienia ich wymiaru miejskości. Niemiecka myśl urbanistyczna łączy w sobie dwie wyraziste tradycje dwudziestego wieku - Gründerzeit i KlassischeModerne. Pozostaje jednak silnie otwarta na innowację generowaną nie tylko dzięki postępowi technicznemu, ale przede wszystkim poprzez planowanie interdyscyplinarne...

    Pełny tekst do pobrania w portalu

  • In Search of Naval Beauty. Historical Study of Ship Architecture

    Publikacja

    - Rok 2018

    Designing ships is no mean achievement. In the old days, constructors focused on making their ships visually appealing, while paying scant regard to the living conditions of the crew. Such an approach reflected the state of the art in ship building at the time as well as the social order prevalent in those days. A breakthrough came no earlier than at the turn of the 19th / 20th centuries. The industrial revolution brought along...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Filter-Hilbert Method for Automatic Correction of Non-Anechoic Antenna Measurements with Embedded Self-Calibration Mechanism

    Publikacja

    One of the most important steps in the process of antenna development involves measurements of its prototype. Far-field performance of radiators is normally characterized in strictly controlled environments such as anechoic chambers which can ensure certification-grade accuracy. Unfortunately, they are also characterized by high construction costs which might not be justified for low-budget research and/or teaching-related activities....

    Pełny tekst do pobrania w serwisie zewnętrznym

  • MOOCs in SP4CE - case studies (Strategic Partnership for Creativity and Entrepreneurship)

    Publikacja

    - Rok 2016

    SP4CE stands for Strategic Partnership for Creativity and Entrepreneurship project which has been funded with support from the European Commission under the ERASMUS+ Programme in the period 1st September 2014 - 31st August 2017. The main purpose of SP4CE project is to design innovative e-learning tools for collaboration between students, enterprises and teachers. It concentrates on identifying users’ needs and supports the development...

    Pełny tekst do pobrania w portalu

  • Architecture Design of a Networked Music Performance Platform for a Chamber Choir

    This paper describes an architecture design process for Networked Music Performance (NMP) platform for medium-sized conducted music ensembles, based on remote rehearsals of Academic Choir of Gdańsk University of Technology. The issues of real-time remote communication, in-person music performance, and NMP are described. Three iterative steps defining and extending the architecture of the NMP platform with additional features to...

    Pełny tekst do pobrania w portalu

  • TRANSMISJA GŁOSOWYCH KOMUNIKATÓW DROGOWYCH W RADIOFONII CYFROWEJ DAB+

    Publikacja

    Proces cyfryzacji radia jest nowym rozdziałem w historii radiofonii. Wiele rekomendacji i badań naukowych wskazuje na standard DAB+ (Digital Audio Broadcasting plus), który w niedalekiej przyszłości ma zastąpić analogową radiofonię FM. Ten system cyfrowy wprowadza wiele zmian, oferując przy tym lepszą jakość dźwięku oraz szereg usług dodatkowych. W pracy postanowiono zbadać minimalną wymaganą przepływność bitową potrzebną do transmisji...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Verification of a Novel Method of Detecting Faults in Medium-Voltage Systems with Covered Conductors

    Publikacja

    - Metrology and Measurement Systems - Rok 2017

    This paper describes the use of new methods of detecting faults in medium-voltage overhead lines built of covered conductors. The methods mainly address such faults as falling of a conductor, contacting a conductor with a tree branch, or falling a tree branch across three phases of a medium-voltage conductor. These faults cannot be detected by current digital relay protection systems. Therefore, a new system that can detect the...

    Pełny tekst do pobrania w portalu

  • Performance analysis of power swing blocking feature in ABB 670 series impedance relays

    Publikacja

    - Acta Energetica - Rok 2012

    This paper presents test results of a distance protection’s PSD power swing detection feature in ABB 670 series relays. A RED670 relay was tested, which is part of the hydroelectric set protection in Żarnowiec Pumped Storage Plant. The power swing blocking feature’s performance was analysed on the basis of the results of object tests made with an Omicron digital tester. Also presented are simulation results that illustrate the...

    Pełny tekst do pobrania w portalu