Lodz University of Technology

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    4466 research outputs found

    Development of sensor design for smart kinesiotape for future sensing applications in motion capturing

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    The “CENTRE FOR TACTILE INTERNET WITH HUMAN-IN-THE-LOOP (CeTI)” is a Cluster of Exellence that, from an textile point of view, deals with the development and invention concerning smart devices [1]. These can be used in many fields e.g. industry 4.0, medicine and skill leaning. Currently expensive, tender and large, stationary camera systems are necessary to capture human motions for various applications. The usage of textile substrates with implemented sensory units gives high potential for body-near motion capturing. Smart textiles gain more and more interest in the field of sports [2] and health monitoring. The avoidance of personal injuries due to the incorrect execution of movements is one main target to reach with smart textiles in healthcare and sports. The aim of the contribution is the investigation of characteristics using electrically conductive (EC) yarns implemented in woven textiles as future smart textiles for close up motion capturing

    The role of light in the city

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    Architektura definiowana jako gra brył w świetle staje się tworem transcendentalnym, podlegającym nieustannym zmianom, wykracza poza swoją z góry zdefiniowaną formę, tworząc nieskończone możliwości odczytywania jej na nowo. Światło wpływa na postrzeganie przestrzeni miejskiej, nasze samopoczucie, poczucie bezpieczeństwa, klimat oraz kontekst danego otoczenia. Najpierw zostanie przedstawiona rola światła w historii kształtowania się miast na przestrzeni wieków z perspektywy urbanistycznej. Następnie omówiona zostanie rola światła we współczesnych miastach. Ma ono znaczenie dla funkcjonowania tkanki miejskiej; rozpoczynając od rytmu życia mieszkańców po wszelkie oryginalne przejawy kreatywności i wykorzystywania zastanego środowiska do tworzenia wystąpień o charakterze performatywnym. Projektując strukturę urbanistyczną, nie możemy kierować się jedynie aspektami ważnymi dla człowieka, ponieważ czynniki naturalne w znacznym stopniu wpływają na postrzeganie przestrzeni. Względy środowiskowe, wspólne naszemu organizmowi oraz florze i faunie, skonfrontowane ze zrównoważonym projektowaniem, nie dają nam jednoznacznego rozwiązania, jak powinniśmy kształtować oświetlenie miejskie. Pod koniec zostanie podjęta refleksja, z perspektywy architektonicznej, jakie rozwiązania byłyby właściwe w kontekstach istotnych dla tematu perspektyw – środowiskowej, urbanistycznej oraz filozoficznej.Architecture is defined as the masterly, correct, and magnificent play of volumes brought together in light – it becomes a transcendental creation, subject to constant changes, it goes beyond its predefined form, creating an infinite number of ways to read it anew. The perception of urban space, our well-being, sense of security, ambience, and the context of an environment are all influenced by light. First, the role of light in the history of city shaping over the centuries will be presented from an urban perspective. The importance of light in modern cities will then be discussed. It is critical for the functioning of the urban tissue, beginning with the rhythm of life of the inhabitants and continuing with all original manifestations of creativity and use of the existing environment to create performative performances. When designing an urban structure, we cannot only consider aspects that are important to humans, because natural factors have a significant impact on how people perceive space. When confronted with sustainable design, environmental considerations common to our organism (soma) and flora and fauna do not provide a clear solution on how we should design urban lighting. In conclusion, from an architectural standpoint, what solutions would be appropriate in the contexts relevant to the most important perspectives – environmental, urban, and philosophical – will be considered

    Zaburzenia depresyjne wśród studentów

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    The effect of 3D weft-knitted fabric composition on puncture, tear, and air permeability

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    This study investigates the influence of 3D weft-knitted fabric fibre composition on the risk of puncture and tear and evaluates the air permeability of these protective knits. For this purpose, different 3D weftknitted fabrics, consisting of outer (protective), binding, and inner (suitable for contact with skin) layers, were produced on an E20 circular weft-knitting machine using different quantities of high molecular weight polyethylene (HMWPE) (from 49% to 24%) and inorganic yarns (from 0% to 23%) in the outer layer while the quantity of polyester in the inner layer and polyamide in the binding layer was kept the same. The puncture and tear resistance tests were conducted to determine the resistance of the 3D weftknitted fabrics to mechanical risks. The air permeability test was performed to assess the comfort properties of the protective 3D weft-knitted fabrics. According to the puncture and tear resistance testing results, it was determined that the highest HMWPE percentage content in the outer layer of 3D weftknitted fabric provided the highest resistance to these mechanical risks. Based on the air permeability test results, it was found that knit with the highest inorganic yarns content in the outer layer achieved the highest air permeability value

    Coating functionalized with silicon carbide for cut-resistant protective glove

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    Workers’ hands are at the highest risk of being affected by harmful factors in the work environment and upper limb injury is the most widespread type of workplace accident occurring during the performance of manual tasks. The protective properties of glove materials may be improved by continuous or spot coating [1–2] with polymeric materials such as poly(vinyl chloride), polyurethane, silicone, and natural or nitrile rubber [3–6]. The objective of the present work was to evaluate the effects of different size of particles added to a polymer material applied onto a textile carrier on the cut resistance of the resulting material. Knitted aramid textile samples were coated in laboratory conditions using a polymer paste that was functionalized with silicon carbide (SiC) reinforcing particles of three different size fractions. On the basis of the research it was found that the smallest size of SiC particles had the greatest effect on increasing cut resistance

    Technological design of jacquard fabric and their functionalization

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    Functionalization of fabrics allows us to influence the physical-mechanical properties by using special yarns that improve fabric's properties, such as elasticity [1,2], thermal regulation [3,4], protection against ultraviolet (UV) rays [5–7], etc. In addition, from a design point of view, the shape and size of the pattern, its frequency and area distribution are also important, not only as a visual effect, but also in terms of the above-mentioned properties [8–10]. The aim of the study was to determine how different weft yarns, the size of the pattern and weave affect the final properties of the jacquard fabric. Six jacquard fabrics were woven on the same warp with two different weft yarns (cotton, Lyocell Clima) in two different patterns and two groups of double twill weaves (stiched and unstiched). The results show that fabrics made of cotton have poorer mechanical properties and lower permeability than fabrics with Lyocell Clima weft. Double unstitched fabrics generally have poorer mechanical properties and UV protection factors (UPF), but better air permeability values. A statistically significant influence of the raw material was shown for thickness, mass, thermal conductivity, tensile strength and, in the case of the size pattern and weave, for air permeability, breaking and tear strength

    Effect of footwear material on the plantar pressure of diabetic foot

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    This paper examines the effect of sole material on the plantar pressure for different skin aging conditions of a diabetic foot. A fully parametric finite element model, based on a 3D bio-model, was developed, and used to evaluate the effect of various combinations of sole materials and skin stiffness on the developed plantar pressure distribution for three main gait phases. The results reveal the significant effect of sole on the reduction of plantar pressure and how it varies for different skin aging conditions and gait phase

    Late-Scholastic Economics and Classical Liberal Thought

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    Late-scholastic economics is still the most underrated discipline in the history of economic thought. In contrast, its contribution to the development of economics and the way of thinking about economic matters is worthy of attention. This article presents the economic thought of the late Spanish scholastics proving that with their concepts on economic affairs, they preceded the advent of many economic theories by centuries and even avoided some of the mistakes made by liberal thinkers. In the period when medieval scholars formulated their concepts, economic life differed significantly from modern economic reality. Nevertheless, many of their considerations concern issues that are still topical today and considered free-market ideas

    An inverse Fraïssé limit for finite posets and duality for posets and lattices

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    Numerical simulation and experimental study of trapezoidal tear of triaxial woven fabric

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    The tear damage of triaxial woven fabric (TWF) are investigated by numerical simulation method and experiment method to study the tear properties of samples with pre-cut in different directions. It is analysed that the changing law of tear load and the characteristics of tear failure during tear process. The results indicate that the tear load-displacement curve can be divided into low modulus region, high modulus region and shock region, which are related to initial stage, pre-cut opening stage and tear opening expansion stage the tear process of TWF. When the pre-cut is parallel to the yarn, samples have higher tear load and larger tear starting position

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