Technical University of Liberec

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    73595 research outputs found

    CUTTING ROOM SOFTWARE: ENHANCING EFFICIENCY IN GARMENT PRODUCTION

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    The rapid growth of the ready-to-wear industry has created a need for continuous improvement, along with the necessity to shorten production times and increase quality. The processes in this industry comprise a series of sequential activities carried out by machines and workers in a specific order. Particularly before cutting, checking model information is critically important. However, the various document formats used in the industry and the software employed to manage this data can complicate the work for personnel. In this context, there is a need for user-friendly software to enhance operational efficiency and minimize errors. This research aims to develop software focused on cutting processes. The developed software allows users to quickly and effectively access model and fabric information, measurement charts, and warehouse data, while simplifying complex processes. Additionally, its simple interface enables use without the need for special training and allows for the remote management of processes. As a result, the software aims to increase operational efficiency while reducing errors and workload

    Zápis z porady 6/2025 (26. 3. 2025)

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    Příklady z Pružnosti a pevnosti 1

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    Central European sustainable economy: The role of green finance, technological innovation, and circular economy

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    The European Green Deal has clarified the need to evaluate the factors affecting the ecological footprint and find strategies to reduce their impact. The study evaluates the correlation between green finance, technological innovation, circular economy, urbanization, energy consumption, economic progress, and ecological footprint. It analyzes data from Central European communities from 1990 to 2022, using robust econometric evaluations, including common correlated effect mean group (CCEMG) and augmented mean group (AMG) models, along with an initial examination of cross-sectional dependence, unit roots, cointegration, and slope heterogeneity. The findings highlight that a reduction in ecological footprints can be achieved through technological innovation, green finance, and a circular economy. In contrast, energy consumption, urbanization, and economic development tend to increase the ecological footprint. Advanced models such as fully modified ordinary least square (FMOLS) and Driscoll and Kraay (DSK) support these findings. The causality analysis revealed the unidirectional and bidirectional relationship between variables. Based on these outcomes, the study recommends that Central European countries implement suitable policies to push the transition toward a sustainable economy

    Home as Experience Rethinking Home Design for People with Visual, Hearing, and Mobility Impairments.

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    According to the WHO, 1.3 billion people, one in six globally, live with significant disabilities, yet our built environment rarely reflects this reality. The United Nations Convention on the Rights of Persons with Disabilities (UNCRPD) advocates for equal rights and protections, while the Sustainable Development Goals (SDGs) outlines spatial, social, and economic inclusion. However, accessibility in housing is often treated as an afterthought rather than a core design principle. Most homes follow standardized layouts that fail to consider how individuals with different impairments navigate and experience space. This thesis challenges that norm by designing three distinct housing prototypes, each tailored to the specific needs of visually impaired individuals, hearing impaired individuals, and wheelchair users. The goal is to rethink what a home means for individuals with diverse disabilities and how it feels when designed around their needs. Beyond simply meeting accessibility standards, these homes will focus on independence, comfort, and sensory engagement. Research shows that 70% of disabilities are non-visible, showing that accessibility is not just about providing physical accommodations but about creating spaces that intuitively support the way people move, hear, see, and interact with their environment. The design process begins with an understanding of the user's abilities and limitations in terms of moving through space. By considering suitable proportions, materials, natural light, acoustics, and navigation strategies, carefully mapping spatial flows based on each individual's mobility and sensory needs, and by combining technical accessibility solutions with thoughtful architecture this thesis aims to propose three housing models that align with the individual's ability and limitation to achieve a spatial experience that is sensually heightened, functionally seamless, and human centered.According to the WHO, 1.3 billion people, one in six globally, live with significant disabilities, yet our built environment rarely reflects this reality. The United Nations Convention on the Rights of Persons with Disabilities (UNCRPD) advocates for equal rights and protections, while the Sustainable Development Goals (SDGs) outlines spatial, social, and economic inclusion. However, accessibility in housing is often treated as an afterthought rather than a core design principle. Most homes follow standardized layouts that fail to consider how individuals with different impairments navigate and experience space. This thesis challenges that norm by designing three distinct housing prototypes, each tailored to the specific needs of visually impaired individuals, hearing impaired individuals, and wheelchair users. The goal is to rethink what a home means for individuals with diverse disabilities and how it feels when designed around their needs. Beyond simply meeting accessibility standards, these homes will focus on independence, comfort, and sensory engagement. Research shows that 70% of disabilities are non-visible, showing that accessibility is not just about providing physical accommodations but about creating spaces that intuitively support the way people move, hear, see, and interact with their environment. The design process begins with an understanding of the user's abilities and limitations in terms of moving through space. By considering suitable proportions, materials, natural light, acoustics, and navigation strategies, carefully mapping spatial flows based on each individual's mobility and sensory needs, and by combining technical accessibility solutions with thoughtful architecture this thesis aims to propose three housing models that align with the individual's ability and limitation to achieve a spatial experience that is sensually heightened, functionally seamless, and human centered

    Vývoj funkcionalizovaných vláknitých struktur

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    This habilitation thesis is a set of selected published scientific papers or engineering papers supplemented with a commentary according to §72 paragraph 3-point Act No. 111/1998 Coll. on universities. In total, the full set of scientific paper contains 24 research works published in impact factor journals and 2 published books. The chosen scientific papers are mainly focused on the study of fibrous structures for functional properties. The fibrous structures' peculiarities are explained where the important structural properties, such as porosity, are described. The possibilities of using different materials to boost selected functional properties are discussed. The development of nanoporous membranes by using electrospinning and electrospraying techniques are described. The efficacy of middle layers in multi-layered fibrous structures are detailed and embedding polyethylene glycol in silica aerogel, polytetrafluoroethylene fibrous layer filled with Aerogels and Phase Change Materials, aerogel-coated Kevlar Woven Fabrics, and PEG/Metal particle-coated viscose fabric is also described. The application of advanced structures for enhanced functionality is also provided. The conclusion summarizes this research topic's findings, benefits, and future direction.Tato habilitační práce je souborem vybraných publikovaných vědeckých prací nebo technických prací doplněných komentářem podle §72 odst. 3 písm. zákona č. 111/1998 Sb. o vysokých školách. Celkem soubor vědeckých prací obsahuje 24 vědeckých prací publikovaných v časopisech s impakt faktorem a 2 vydané knihy. Vybrané vědecké práce jsou zaměřeny především na studium vlákenných struktur z hlediska funkčních vlastností. Jsou vysvětleny zvláštnosti vlákenných struktur, kde jsou popsány důležité strukturní vlastnosti, jako je např. porózita. Jsou diskutovány možnosti využití různých materiálů pro zvýšení vybraných funkčních vlastností. Je popsán vývoj nanoporézních membrán pomocí technik elektrospinningu a elektrosprejování. Podrobně je popsána účinnost středních vrstev ve vícevrstvých vláknitých strukturách a zapouštění polyethylenglykolu do křemičitého aerogelu, polytetrafluorethylenová vlákenná vrstva plněná aerogely a materiály s fázovou změnou, kevlarové tkaniny potažené aerogely a viskózová tkanina potažená částicemi PEG/kovu. Je rovněž uvedena aplikace pokročilých struktur pro zvýšení funkčnosti vlákenných struktur. V závěru jsou shrnuty poznatky, přínosy a budoucí směřování tohoto výzkumného tématu

    Zpracování dat pro výpočet relaxačních časů ze 7T experimentálního MR přístroje

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    Teoretická část práce rozebírá fyzikální principy nukleární magnetické rezonance a princip fungování na ní založeném tomografu. Praktická část se zabývá popisem fungování nově vyvinutého softwaru pro výpočet relaxačních map. Theoretical part of the paper describes the physical principles of nuclear magnetic resonance and the principle of operation of the tomograph based on it. Practical part is dealing with the description of a newly developed software for the calculation of relaxation maps

    UNIKNI TUL - Únor 2025

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    Profitability determinants of cooperative Islamic insurance companies

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    The aim of the paper is to investigate the profitability determinants of cooperative insurance companies in Saudi Arabia. The mentioned insurance companies conduct business activities on the largest Islamic insurance market in the world, which has a growing demand for insurance as an instrument of risk management and a meaningful potential for further growth. A particular motive for conducting this research was the fact that these companies have common characteristics with mutual insurance companies that represent one-third of the European insurance market. Taking into account the characteristics of cooperative insurance companies’ business operations and the special structure of financial reports of these insurers relying on and in accordance with the results of the latest research on this topic as profitability determinants, we use return on assets (ROA), return on equity (ROE) and earnings per share (EPS), while explanatory variables include microeconomic (company size, investment profitability, investment income ratio, operator’s fee, expense ratio, loss ratio, premium growth, risk exposure, capital adequacy, reinsurance dependence, specialization) and macroeconomic (interest rate and equity returns) variables. The data are collected on a quarterly basis for 28 companies from 2012 until the second quarter of 2020. We use first- and second-generation unit-root tests, heteroscedasticity test, cross-sectional dependence test, autocorrelation test, Hausman and Overid tests and multicollinearity test to determine model parameters. Due to the presence of heteroscedasticity and cross-sectional dependence, we analyze the data using Beck and Katz’s panel corrected standard errors (PCSE) method. The results suggest that the financial performance of cooperative insurance companies in Saudi Arabia is determined by expense ratio, loss ratio, specialization (general or life and composite insurer) and the value of the operator’s fee, which depends on the amount of the underwriting surplus. Taking into account the key characteristics of cooperative insurance companies, the results of our research can be used by decision makers of cooperative insurance companies in strategic and operational planning and can provide help for policymakers in other countries that use alternative insurance models

    Leadership role in sustainable future of circular economy: Climate, economy, and environment interplay

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    The issue of climate change is a significant concern in contemporary society characterized by a volatile, uncertain, complex, and ambiguous (VUCA) environment. Asian nations are also dealing with issues related to climate change. The objective of this study is to ascertain the relationship between climate change and its impact on both the economy and the environment. This research examines the moderating influence of leadership skills on the variables of climate change, the economy, and the environment. The study employed a time lag research design to gather data in Pakistan. The analysis was based on a structural equation modelling approach with a sample size of 4,243 participants. The results suggest that leadership skills have a significant moderating impact on the relationship between climate change and the economy, and between climate change and the environment. The research highlights the impact of climate change on the economy and environment of a developing nation. The findings indicate that effective leadership abilities are necessary to manage environmental and economic conditions for long-term sustainability. The study holds significant implications for both theoretical and practical domains, particularly in enhancing climate control by incorporating leadership competencies. This research contributes to the concept of circular economy by showcasing the complex relationship between climate change, environment, economy, and leadership. The research extends noteworthy avenues for future exploration, laying the foundation for further contributions to the existing body of literature related to circular economy

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