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Analysis of the heat transfer property with the sandwich fabrics based on ANSYS workbench and Alambeta
No full textAs more and more attention is paid to the thermal comfort of clothing, academic research on the heat
transfer properties of textile materials is becoming more and more important. In recent years, the
application of simulation software to analyze the heat transfer properties of fabrics has become a
research hotspot. In this paper, the ANSYS workbench simulation software is used to simulate the heat
transfer property of a kind of sandwich fabric. The results obtained by establishing different models
show that the application of single-layer fabric with different thermal resistances in the sandwich fabric
will lead to greatly different thermal resistances of sandwich fabric; the same material has different
thicknesses, and its thermal resistance will increase with the thickness; the same single-layer fabric with
different combination positions will cause the thermal resistance of the sandwich fabric to change. At
the same time, the software simulation values are compared with the actual measured values. It can be
found that the two sets of data have the same trend, but the data of the former is significantly higher than the latter. The reason is that the model's porosity is much smaller than the actual sample
Zarządzanie i innowacje u progu XXI wieku
No full textProjekt okładki : Marta Potemba,,Zarządzanie i innowacje u progu XXI wieku to monografia, która stanowi powrót
do tradycji akademickich spotkań i dyskusji. Jej zasadniczą wartością jest to, że
inicjatywa takiej publikacji wypływa od grupy studentów związanych z kołami
naukowymi, czyli od najmłodszych pasjonatów nauki. [...] Pierwsza część zatytułowana jest Zarządzanie współczesnymi organizacjami.
Obejmuje ona zagadnienia związane z funkcjonowaniem organizacji: począwszy
od rozważań historycznych, dotyczących ekonomii późnoscholastycznej, poprzez
kwestie związane z komunikacją, kulturą organizacyjną, zagadnieniami zasobów
w cyklu życia przedsiębiorstwa czy smart contracts, na zarządzaniu opartym
o sztuczną inteligencję czy technologię blockchain skończywszy. Autorzy podejmują
kwestie, które determinują współczesny dyskurs nad przyszłością organizacji,
analizują czynniki, które na tę przyszłość będą miały ogromny wpływ.
Druga część Wyzwania XXI wieku to dalszy ciąg refleksji nad organizacją
jutra. Większość zawartych tu analiz dotyczy problemów teraźniejszości, np.
reperkusji pandemii COVID-19, które jednak mają ogromny wpływ na kierunek
zmian funkcjonowania organizacji w przyszłości. Autorzy poruszają kwestie
związane z nauczaniem zdalnym, ze sposobami zarządzania zespołem wykonującym
pracę zdalną, kwestiami zmian preferencji zakupowych, na które pandemia miała
niewątpliwie wpływ, ale też form i możliwości odnajdywania się niewielkich firm
(rodzinnych) w sytuacji kryzysowej. Uwagę młodych badaczy przykuły także
inne doświadczenia obecnego wieku, chociażby te związane z uczeniem organizacyjnym
(opartym o Zespoły Scrumowe), przyszłością zarządzania, finansowania
profesjonalnych drużyn sportowych czy problemami zrównoważonego rozwoju.
Istotną kwestią okazała się analiza czynników kryzysowych (trudnych), z jakimi
spotykają się „organizacje dziś” i próba wskazania drogi wyjścia (zmiany, naprawy)
dla dobrej przyszłości „organizacji jutra”.
Ostatnia część Innowacje na miarę przyszłości obejmuje analizę nowych
trendów obecnych czasów. Przedstawiono w niej zagadnienia efektywności
kształcenia metodą QEEG, możliwości Sieci Bayesa, scharakteryzowano projekt
techniczny Sondy Akwizycji Głosu SAGv2, algorytmy sterowania sygnalizacją
świetlną, a także omówiono determinanty implementacji usług IT czy też zjawisko
telemedycyny jako swoistego przełomu w systemie ochrony zdrowia. Całość
wieńczy refleksja nad kwestiami etyki odpowiedzialności jako jednej z propozycji
na rozwiązania współczesnej i przyszłej techniki. Część trzecia zdecydowanie
dotyczy przyszłości. Analizy w niej zawarte pokazują rozwiązania jutra dotyczące
nie tylko rozstrzygnięć technicznych czy medycznych, ale i humanistycznych.
Stąd też stawiane przez Autorów pytania i prezentowane propozycje rozwiązań
wpisują się w interdyscyplinarną debatę nad poprawą jakości życia ludzi i organizacji
oraz podejmowania konstruktywnych działań na rzecz lepszej przyszłości.[...] ",,Management and innovation at the threshold of the 21st century is a return to
the tradition of academic meetings and discussions. The book’s greatest value
is that it comes from a group of students associated with academic circles, that is,
from the youngest enthusiasts of learning. [...] The first section, entitled „Managing
modern organizations” includes chapters related to issues of how organizations
function. It ranges from historical considerations, classical ones on late-Scholastic
economics, through issues related to communication, organizational culture,
resource issues in the life cycle of an enterprise or smart contracts to management
based on artificial intelligence or blockchain technology. This is a rich analytical
field where the authors address issues that determine the contemporary discourse
on the future of organizations and analyse factors that will have a major impact
on this future.
The second part of „Challenges of the 21st Century” is another step in reflecting
on the organizations of tomorrow. A large part of the analysis contained herein
is based on problems arising from the present (repercussions of the COVID-19
pandemic), which, constitute and have a significant impact on the direction
of changes in the functioning of organizations in the future. Therefore, such issues
relate to remote learning, or ways of managing a team working remotely, changes
in purchasing preferences, on which the pandemic had an undoubted impact, but
also forms and opportunities for small (family) companies to find themselves in
a crisis situation. The authors also draw attention to other experiences of the
current century, such as organizational learning (based on scrum teams), the future
of management, the financing of professional sports teams, or those related to
sustainable development. An important role of these chapters is to analyse
the crisis (difficult) factors faced by the „organizations of today” and to try
to indicate the way out (change, repair) for the good future of the „organizations
of tomorrow.”
The last of the sections, „Innovations for the Future,” includes an analysis
of new trends of the present time. It will present the issues of the effectiveness
of education by the QEEG method, the possibilities of the Bayes Network, the
characterized technical project of the SAGv2 Voice Acquisition Problem, traffic
signal control algorithms, discussed determinants of implementing IT services
or the phenomenon of telemedicine as a kind of breakthrough in the health care
system. The entire chapter is crowned with a reflection on the issues of ethics
of responsibility as one of the proposals for the solutions of modern and future
technology. The third part addresses the future - the analyses contained therein
show the solutions of tomorrow, including a proposal of technical and medical but
also humanistic solutions for the improvement of human existence, organization,
and a better future. [...]
Comparison between local temperature distribution under clothing and on clothing
No full textWe measured temperature distributions under a garment using a measurement garment made of a textile
instrumented with multiple thermocouple temperature sensors. We also measured the surface
temperature of the garment using an infrared thermography camera. Comparing these separate
temperature measurements enabled measurement of the increased temperature and its distribution under
the clothing when wearing a shirt, which the infrared thermography camera does not measure. The
places where the temperature increased were also confirmed. The local temperature distribution under
the garment was also evaluated, which is not available from the surface temperature of the thermal
manikin. Therefore, it was shown that the developed measurement garment can be used to measure
temperature distribution in microclimate spaces and is useful for evaluating the thermal performance of
garments
Identyfikacja współczynników sprężystości w problemie zginania płaskich wyrobów włókienniczych
No full textNagrody Ministra
No full textArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022Podczas gali z okazji Dnia Nauki Polskiej
ogłoszono laureatów Nagród Ministra Edukacji
i Nauki. Naukowcy i badacze zostali
wyróżnieni za zasługi w pięciu kategoriach:
znaczące osiągnięcia w zakresie działalności
naukowej, dydaktycznej, wdrożeniowej,
organizacyjnej oraz całokształt dorobku. Minister
przyznał 103 nagrody, w tym 86 indywidualnych
i 17 zespołowych
Design and development of a nanofiber reinforced multilayered cloth face mask
No full textThe use of medical masks in daily life has become inevitable due to the Covid-19 pandemic. Especially
at the beginning of the pandemic, the supply of face masks was unable to meet the demand. Also,
medical masks are causing plastic waste since they are not sustainable. Accordingly, cloth masks have
the potential to be an environmentally friendly and sustainable alternative to medical masks. In this
study, it was aimed to develop two and three layered cloth masks, and investigate the effects of fabric
parameters of the masks on the bacterial filtration efficiency (BFE). Four fabrics with different cover
factors were woven. The raising finishing was applied to the outer layer to increase the filtration by
closing the pores on the surface. An electrospun nanofiber layer was also used as a mid-layer to improve
bacterial filtration. All BFE results were higher than the minimum standard BFE of 90%. The results
showed that an electrospun mid-layer was more effective for increasing the BFE compared to raising
finishing onto the outer layer of the masks. The BFE improved slightly when the cover factor of the
fabric increased
Effect of tensile strength of lignocellulosic himalayan nettle fibers by chemical treatment
No full textThe physical and chemical properties of Himalayan nettle fibers treated with sodium hydroxide and
sodium chlorite solutions have been studied in this research. Nettle fibers are naturally derived, highstrength
nettle yarn for the preparation of home textiles, handicrafts, and ropes. It is a high fiber-yielding
plant that grows naturally in the Himalayan areas. In this study, nettle fiber samples were soaked in 4%
sodium hydroxide (NaOH) and 1% sodium chlorite (NaClO2) solutions at a 100oC temperature for
90 minutes. The untreated nettle fibers were soaked in a 4% sodium hydroxide water solution at a 100oC
for 60 minutes. The nettle fiber test samples were prepared and tested as stated in the ASTM standards.
The average tensile strength of alkaline nettle fibers increases by upto 60% compared with untreated
fiber. The mild alkali treatment increases tensile strength, cellulose content and decrease elongation
break acts to be due to fiber extraction and separation of non-cellulosic materials such as hemicellulose,
lignin, and pectin. Compared to untreated nettle fiber, the average young's modulus of sodium
hydroxide-chlorite treated fiber was increased. Moisture sorption analysis, Fourier transform infrared
spectroscopy (FTIR), single fiber tensile strength, and physical properties were used to evaluate the
properties of untreated and treated nettle fibers
Stability of vitamin c and beta – carotene during the tomato paste lyophilization process the tomato paste lyophilization process
No full textThe aim of the study was to evaluate the stability of vitamin C and beta-carotene in the freeze-drying process compared to other thermal drying methods. Tomato puree was selected as a model product for testing the stability of vitamin C and vitamin A in drying processes, due to its properties, such as: appropriate consistency, which was favorable for the analyzes performed, and the presence of the above-mentioned vitamins. Model studies were performed on the stability of vitamin C and beta-carotene under the conditions of air-drying at 105°C, drying under reduced pressure at 70°C and freeze-drying on a tomato puree matrix. Results proved that freeze-drying is superior to other drying methods with the lowest losses of both vitamin C (losses of 4%) and beta-carotene (losses of 25%) in tomato purée. In the case of drying at 70°C under reduced pressure, the loss of beta-carotene is 55%, and vitamin C – 78%. In the case of air-drying at 105°C, vitamin C is 100% degraded, and the loss of beta-carotene is 91%. Moreover, it can be concluded that vitamin C in a higher dose has a protective effect on carotenoids
Hydrostatic resistance dependence on the structure and the use of gradient measurement
No full textHydrostatic resistance is an important property for outdoor fabrics as a shelter to the human body against
the unfavourable outdoor environment. Rain, strong wind, snow attack human health and comfort
feeling. Hydrostatic resistance can be described by the unit of the water column and measured by the
standard ČSN EN ISO 811 [1]. Paper compare the behaviour of the two and three laminates in one study
and two instruments in the second study. It was realised that measurement with the three laminate is
balanced more if we apply pressure from the upper surface and inner surface. Two laminates membrane
is not supported by the fabric if we apply water pressure from the upper surface. Hydrostatic resistance
is significantly lower. Two instruments measurement is impossible to confuse in porous materials and
lower fabric densities of water repellent fabrics. Durable fabrics and laminated fabrics need to be studied
in the following study