bluuebunny/crossref_metadata_2025 huggingface dataset:
MODELLING AND SIMULATION OF THE MECHANICAL BEHAVIOUR OF WEFT-KNITTED FABRICS FOR TECHNICAL APPLICATIONS
Authors: Araújo M. de , Fangueiro R. , Hong H.
Published: December 2023

This paper is in four parts. The first is related to general considerations and experimental analyses, and each of the others is related to different approaches to theoretical analyses of the mechanical behaviour of weft-knitted fabrics and weft-knitted reinforced composites made of glass fibre. The objective is to find ways of improving the mechanical properties and simulating the mechanical behaviour of knitted fabrics and knitted reinforced composites, so that the engineering design of such materials and structures may be improved. In Part III the second model is presented, and this is a 2D model based on FEA (finite element analyses). A plain weft-knitted fabric, based on the simple loop structure, is simplified and represented by a 2D hexagonal structure constructed by non-linear truss elements. The characteristics of the truss elements for FEA simulation are obtained from experimental results through an analytical method when a loop is converted to a FEA model. The elongation deformation is simulated in one, two and multiple directions. The model can also be used to calculate a planar knitted fabric for deformation to fit a 3D spherical mould.
MECHANICS AND ANALYSIS OF FABRIC COMPOSITES AND STRUCTURES
Authors: Morozov Evgeny V.
Published: December 2023

Abstract

This paper is devoted to the mechanics, modelling and analysis of fabric-reinforced
composites and structural components. A theoretical and experimental characterisation of
elastic properties of the textile composites is considered. Typical stress-strain diagrams
for fibreglass fabric composites and composites reinforced with knitted fabrics loaded in
tension at different angles are presented. The special case of the three-dimensional
reinforcement structure of composite material, composed of spatially-oriented fabric
layers is discussed and corresponding models considered. Manufacturing technology for
such structures includes a three-dimensional lay-up process in which the specially
designed fabric patterns are placed onto the mould or mandrel. The implementation of
the material model is illustrated with results of the stress-strain analysis of thin-walled
spatially reinforced structural components.
OUTSOURCING AS A MODERN MANAGEMENT STRATEGY. PROSPECTS FOR ITS DEVELOPMENT IN THE PROTECIVE CLOTHING MARKET
Authors: Koszewska Małgorzata
Published: December 2023

Abstract

Outsourcing is a very successful and increasingly popular enterprise management
strategy. The aim of this article is to analyse prospects for outsourcing development in
the protecive clothing market. The author attempts to present outsourcing as a very
successful competitive tool and a way of strengthening a given firm.s position in the
protective clothing market, especially in the face of growing competitive pressures and
progressing globalisation.
AN EXPERIMENTAL INVESTIGATION INTO THE RADIAL COMPRESSIVE PROPERTIES OF THE BIODEGRADABLE BRAIDED REGENERATION CONDUITS FOR PERIPHERAL NERVE REPAIR
Authors: Liu Guohua , Hu Hong , Zhang Peihua , Wang Wenzu
Published: December 2023

Abstract

Different regeneration conduits braided from biodegradable material poly
(glycolide-co-L-lactide) (PGLA) for peripheral nerve repair and their radial compressive
properties are presented. The influences of the braided structure and braiding angle are
discussed. The results have shown that the nerve conduit braided with the triaxial structure
at 60 degrees of the braiding angle has a greater ability to resist radial compression.
ADAPTING AND TUNING QUALITY MANAGEMENT IN SPINNING INDUSTRY
Authors: Azzam Hisham A. , Mohamed Sayed T.
Published: December 2023

The Egyptian government has shown substantial consideration regarding the rehabilitation and restructuring of inefficient companies in the public sector with regard to converting them into profitable companies which will be ready for privatisation. Furthermore, textile manufacturing can be considered as one of the biggest industries in the public sector. So, the idea of showing how textile manufacturers in the public sector can be developed to meet the requirements of marketing and product strategies has been initiated. This study has been prepared to assist in developing one public-sector textile manufacturer to meet the requirements of a quality management system, which in turn reflects on improving the mill performance. Applying the technical means of quality management in the spinning industry, preparing the spinning industry for quality agreements, requirement profiles for different yarn quality characteristics and types, spinning quality problems and solutions, and optimum yarn quality at optimum costs are the key areas which are covered in a unique manner.
APPLICATION OF THE IMAGE ANALYSIS TECHNIQUE FOR TEXTILE IDENTIFICATION
Authors: Drobina Robert , Machnio Mieczysław S.
Published: December 2023

Computer image analysis techniques used for identifying textile products, especially linear textile products, are presented in this paper, together with a brief review of the historical development of these methods. Automatic and semi-automatic image correction methods are described, which are often applied for identification of linear textile products, and can also be used to identify spliced yarn-end connections.
DEVELOPMENT OF FABRIC USING CHEMICALLY-TREATED SISAL FIBRES
Authors: Zwane Pinkie E. , Cloud Rinn M.
Published: December 2023

Abstract

The aim of this study was to explore the spinnability of sisal fibres treated with sodium
hydroxide (NaOH), and the potential utility of spun yarns in producing a woven fabric for
different end uses. Exploratory and experimental approaches were utilised in gathering
data for this project. Yarns were spun using a spinning wheel, and subsequently a
portable weaving loom was used for weaving the fabric. Fabric softeners were applied on
the woven fabric, and later fabrics were evaluated for hand and potential end uses.
Major findings revealed that sisal fibres treated with NaOH were successfully spun into
yarns using a traditional spinning wheel with the aid of a binding agent. Yarns spun from
treated fibres were finer, weaker and highly absorbent. Flexural rigidity was the only
significant fabric property that was decreased for fabric made from treated fibres
compared to the control fabric. The application of fabric softeners had no significant effect
on fabric hand. Subsequently, potential end uses of woven fabric were identified, which
included apparel and accessories.
IMPROVEMENT OF MECHANICAL PERFORMANCES OF BRAIDED POLYESTER SUTURES
Authors: Abdessalem Saber Ben , Jedda Hanen , Skhiri Sondes , Dahmen Jalel , Boughamoura Hatem
Published: December 2023

Non-absorbable sutures are monofilaments or braided structures generally made of polyamide, polyester or polypropylene. The success of a suture is widely linked to its mechanical performance features, such as tensile strength and dimensional stability. We introduced an additional treatment in the manufacture of non-absorbable braided sutures made of polyester. This treatment is based on heat setting of the textile structure by using textile-industry stabilisstabilisation techniques. Boiling water, saturated vapour and dry heat have been tested to stabilise a braided polyester suture. The three techniques involved longitudinal and transversal shrinkages. Heat setting with saturated vapour, and especially with dry heat, increased the breaking strength of the textile structure.
TEARING PROPERTIES OF COATED MULTI-AXIAL WARP KNITTED FABRIC
Authors: Hu Hong , Xu Ying
Published: December 2023

Abstract

In this paper, the tearing properties of a multi-axial warp knitted fabric produced with glass filaments and coated
with PVC resin are presented. The typical tearing load-extension curves and influences of the different tearing
testing conditions are analyzed. The results show that the tearing properties of the coated multi-axial warp fabric
are different from those of the coated woven fabrics and that they depend on the tearing directions and tearing
methods. The trapezoidal method and tearing tests along diagonal directions give higher resistance against
tearing propagation.
ENGINEERING DESIGN OF THE THERMAL PROPERTIES IN SMART AND ADAPTIVE KNITTING STRUCTURES
Authors: Geraldes M. J. , Lubos H. , Araújo M. , Belino N. J. R. , Nunes M. F.
Published: December 2023

Abstract

This work reports on research being carried out in thermal comfort in smart and adaptive knitting structures
(functional structures).
The total comfort of a garment comprises not only the sensorial, thermal and physiological component, but also
aesthetic, colour and size aspects, which make up the so-called psychological comfort. It should be noted that
when buying a piece of clothing for daily wear, the psychological point of view may well play an important role.
Nevertheless it is the thermal and physiological components which have historically been the primary functional
component of clothes, since they must protect us from cold and heat and, simultaneously, have to allow an
appropriate moisture and heat transfer through the different layers.
Thermal comfort is characterised by three important properties:
· Thermal resistance;
· Thermal conductivity;
· Thermal absorptivity.
In this research we present the engineering design of these principal thermal properties in functional structures
and we propose three new equations that simulate the reality of the behaviour of this knitting structures.
EXTRACTION OF NATURAL DYES FROM AFRICAN MARIGOLD FLOWER (TAGETES EREECTA L) FOR TEXTILE COLORATION
Authors: Jothi D.
Published: December 2023

Abstract

African marigold [Tagetes erecta L.], a major source of carotenoids and Lutin, is grown as a cut flower and a
garden flower, in addition to being grown for its medicinal values. Marigold flowers [Tagetes ], which are yellow to
orange red in colour, are a rich source of lutein, a carotenoid pigment. Nowadays, Lutein is becoming an
increasingly popular active ingredient used in the Food Industry and Textile coloration [3].This pigment has
acquired greater significance because of its excellent colour value. Although marigold flower extract has been
used in veterinary feeds, the potential use of marigold as a natural textile colorant has not been exploited to its
full extent. This is due to the lack of information on its safety, stability, and compatibility in textile coloration. In this
study, an experiment was conducted to study the use of an extract isolated from marigold as a natural dye. The
dye potential of the extract was evaluated by dyeing [6], using the flower, in 100 % cotton and silk fabrics under
normal dyeing conditions. Studies of the dyeability, wash fastness, light fastness, and colour hue were undertaken
[8,9,10]. The, L,a and 'b' of materials dyed using the extract were studied with the use of Computer Colour
Matching software [9,10]. The surface colour was not affected by washing, and the quality of the flower was
maintained even washing at 60o C for 30 minutes. Studies have indicated that the change of some of the colors
have been noticed after washing with soap [8]. Most of the metal salts exhibited the highest K/S values, due to
their ability to form coordination complexes with the dye molecules [1,2]. These findings reveal that the extract of
Marigold flower can be used for coloration of !00 % cotton, silk, and wool fabrics. This article deals with the
chemistry, processing, and stability of the pigment and its applications in textile coloration.
IMAGES OF CORONA DISCHARGES AS A SOURCE OF INFORMATION ABOUT THE INFLUENCE OF TEXTILES ON HUMANS
Authors: Ciesielska Izabela L.
Published: December 2023

Abstract

The aim of the experiment was to bring closer the possibilities of using corona discharge photography (CDP),
with special emphasis on the impact of textiles on corona discharge photography of human fingertips in contact
with those textiles. The article describes an investigation concerning a short period of contact with textiles and
their influence on human parameters such as blood pressure (BP) and heart beat (HB) as well as images of
corona discharges (ICD). The authors were searching for a new method of demonstrating the influence of
textiles on human subjects. As the research involved contact of textiles with human skin, certain static and
friction issues were raised. Textile materials were chosen for the experiments on the basis of their tribological
features. The ICDs used here were created as a result of placing body parts, e.g. fingers, in the area of a strong
electrical field of high voltage (10 KV) and high frequency (1024 Hz). A digital camera placed within the area of
discharge recorded this phenomenon. The temperature, air humidity, and air pressure in the examination room
as well as gender, age, HR, BP and in the case of female volunteers, their menstrual cycles, exerted an effect on
ICD in the study group. ICD of human beings seems to be a kind of marker of tribological features of textile
materials.
EFFECT OF PLASMA TREATMENT ON THE SPREADING OF MICRO DROPS THROUGH POLYLACTIC ACID (PLA) AND POLYESTER (PET) FABRICS
Authors: Wardman Roger H. , Abdrabbo Abdulalhameed
Published: December 2023

Abstract

The effect of oxygen plasma treatment on two polyester fibre types, polylactic acid and standard polyester, and
the influence on their respective wetting characteristics is investigated. A novel analytical system, based on
image analysis, was developed for measuring the rate of spreading and dynamic movement of liquid over the
fabrics. The techniques of X-ray Photoelectron Spectroscopy (XPS) and Scanning Electron Microscopy (SEM)
were utilized to examine the nature of the surface modifications after the plasma treatment. The analyses
showed that the oxygen plasma treatment abraded the surface of the PLA fibres, but did not alter their chemical
nature, whilst the surfaces of the PET fibres were less abraded, but had enhanced polarity due to an increase in
carbonyl groups. The increased surface abrasion made little difference to the wetting or wicking rates of water on
PLA fibres, but the increased polarity made a large difference to the rates on PET fibres.
EVALUATION OF A TENSILE TEST FOR THE DETERMINATION OF THE MATERIAL BEHAVIOUR OF FILAMENT YARNS UNDER HIGH STRAIN RATES
Authors: Cherif Chokri , Seidel André , Younes Ayham , Hausding Jan
Published: December 2023

Abstract

In many technical applications, fibre-reinforced composites with textile high-performance fibres made of carbon
or glass are being used. The fibres qualify for their high strength and stiffness due to their physical and chemical
characteristics. It is necessary to guarantee a high safety level under all possible loading constellations. Besides
the usual service loads, the topic of extreme loads that work along with high forces and high impact velocity is of
increasing importance. For these so-called impact loads, the processes within the structural components have
to be analysed and material models suitable for prognoses should be derived from them. The existence of
suitable test machines and test methods is a prerequisite for that, yet for filament yarns they are not state of the
art. Hence, tensile tests with high strain rates on filament yarns are performed on standard high-speed tensile
testing machines. This leads to problems when analysing and interpreting the results and therefore, it is necessary
to develop special testing machines for filament yarns.
PREDICTING RESIDUAL BAGGING BEND HEIGHT OF KNITTED FABRIC USING FUZZY MODELLING AND NEURAL NETWORKS
Authors: Jaouachi B. , Louati H. , Hellali H.
Published: December 2023

Abstract

In this research, fuzzy modelling and neural network methods were used and compared to predict the residual
bagging bend height of knitting fabric samples. Studies undertaken to minimize the bagging phenomenon vary
significantly with the test conditions including the experimental field of interest, the input parameters and the
applied method. Hence, we attempt to formulate a theoretical model of predicting bagging behaviour in our
experimental design of interest. By analysing the bend height of overall bagging samples, this paper provides
an effective neural network model to evaluate and predict the residual bagging bend height of the knitting
specimens after test. It also provides the impact of each input parameter in our experimental field of interest to
simulate this phenomenon after use. Moreover, the contribution of these influential input parameters was analysed
and discussed. Nevertheless, our results show that residual bagging height decreases when yarn contains
elastane filament, Spandex©. This finding is in agreement with Mirostawa et al. [11] that with an increase of the
elastane content in fabric, permanent bagging decreases, whereas elastic bagging increases. According to the
analytical results obtained, the neural network model gives a more accurate prediction than the fuzzy one.
DYEING OF GLASS FIBRES BY THE SOL GEL METHOD
Authors: Chládová Andrea , Wiener Jakub , Luthuli Jewel Mavela , Zajícová Veronika
Published: December 2023

This study focused on the dyeing of glass fibres by colour layers created by the sol gel method. Glass fibres are used as a typical example of fibres with non-ideal dyeing properties. Glass and similar dyes are rigid, the internal fibre structure is non-porous and the glass transition temperature is very high. The sol gel method is used for the fixation of selected dyes on the fibre surface. In this study, we compared basic, disperse and metal complex dyes. The properties of coloured textiles were tested by standard and modified fastness tests. The stability to temperature, washing and light was different according the basic properties of the used dyes. The results of the tests are discussed in this paper. The process of dyeing fibres with sol simultaneously results in reasonable dye fastnesses to the fibres; at the same time, bright and dark shades can also be obtained. The sol used is based on the blending of 3-trimethoxysilyl propyl methacrylate in isopropanol with supporting chemicals (water, HCl, benzoyl peroxide).
CHARACTERISATION OF BARRIER PROPERTIES OF WOVEN FABRICS FOR SURGICAL PROTECTIVE TEXTILES
Authors: Cherif C. , Laourine E.
Published: December 2023

Abstract

The pore morphology of textile filter structures is important for numerous technical applications. It determines
the functional properties of surgical textiles, such as the effective barrier function and wearing comfort. Surgical
and protective textiles must fulfil both of these contradictory functions. To date, basic research has not been
successful, either theoretically or experimentally, in describing the complex correlation between the 3D pore
structure of woven textiles and their barrier properties while simultaneously remaining permeable. In an attempt
to clarify this issue, high density multi-filament woven textiles were categorised according to their geometry, pore
morphology, permeability and retention properties by virtual modelling of their 3D pore morphology. Differentiation
was made between mesostructures (pores between the yarns) and microstructures (pores within the yarn itself).
In this process it was possible to identify the influence of weaving parameters on the pore morphology and
determine their resulting functional properties. Various new testing methods were developed and successfully
implemented to characterise and evaluate the barrier properties. The experiments show that by selecting
specific yarns and weave constructions, the permeability and woven structure can be positively influenced and
adapted to fulfil a wide range of requirements. A major finding is that the permeability and retention properties
of the weave can be independently controlled by choosing suitable machine parameters. Specifically, by varying
the shed closing time a clear shift in the pore size distribution to smaller pore diameters can be achieved without
altering the air permeability. A correlation between the construction and processing parameters and the 3D pore
morphology of the woven textile was ascertained. The relation between the properties of a weave and the
machine and construction parameters is extremely complex due to their interaction.
USE OF THE VIBTEX VIBRATION SYSTEM FOR TESTING TEXTILES
Authors: Tumajer Petr , Ursíny Petr , Bílek Martin , Moucková Eva
Published: December 2023

Abstract

Principal objective of this paper is a description of a special testing device (VibTex). This device allows testing of
textile materials (threads, samples of fabrics, etc.) during cyclical stress at a high frequency. Control of the
VibTex allows harmonic and non-harmonic elongation of the textile samples. Results of the tests with harmonic
elongation can be used for calculations of the dynamic characteristics of textile samples. In the final part of the
paper, values of the dynamic modulus and loss angles are determined at frequencies of 10 Hz and 100 Hz for
various yarns.
FIBRE-BASED SINGLE-WIRE KEYBOARD -THE INTEGRATION OF A FLEXIBLE TACTILE SENSOR INTO E-TEXTILES
Authors: Guo Li , Soroudi Azadeh , Berglin Lena , Mattila Heikki , Skrifvars Mikael , Torstensson Hakan
Published: December 2023

Abstract

A flexible textile keyboard, using carbon nanotube (CNT) filled polypropylene (PP) composite fibres, is introduced.
The identification of input information is achieved by reading the effective resistance of the conductive composite
fibre. By using a single wire, a complex matrix is avoided and the interface between textiles and processing
electronics is reduced to a minimum. LabVIEW has been used as the output display of the keyboard indicator
for testing. This keyboard is fully flexible and washable, which provides opportunities for its integration with etextiles.
Pedagogical Design as a Tool to Increase Students’ Learning Motivation During Distance Learning
Authors: Beisembayeva Altynai , Ibrayeva Kamarsulu , Yerezhepov Talgat , Urazaliyeva Moldir , Sultangaliyeva Elmira
Published: December 2023

The introduction and spread of distance learning imply a shift in approaches and methods of its organisation. This affects the methods and goals of the interaction of subjects of educational activity, including their motivation. That is why the question regarding the analysis of educational components and models aimed at increasing the motivation of education applicants is relevant. Based on this, the purpose of the study was formed, which was to investigate pedagogical design in the context of a means to increase students’ interest in the educational process. As a result, the concept of “pedagogical design” was defined in the context of a modern approach to the implementation of educational and professional training of applicants for education. The features of the establishment of the educational environment based on common goals of learning tasks are considered. The study characterised the basics of pedagogical design, namely, the effective formation of goals, scientific, accessibility, self-organisation, and differentiation of the educational process, providing conditions for the development of a person’s experience.
Inclusive rice seed business: Performance and sustainability
Authors: Prasetyo Teguh , Arianti Forita Dyah , Jauhari Sodiq , Setiani Cahyati , Cempaka Intan Gilang , Pertiwi Miranti Dian , Wulanjari Munir Eti , Jatuningtyas Ratih Kurnia , Purwaningsih Heni , Basuki Seno , Utomo Budi , Minarsih Sri
Published: December 2023

A collective action approach to rice seed production is an inclusive method involving the community’s active participation at all stages of its execution. This all-inclusive strategy, however, has yet to be thoroughly investigated and published. This study explored how and to what degree an inclusive rice seed business of Gapoktan, based on a collective action approach, might be deployed in a sustainable rice seed company run by community groups. The research comprised the following stages: (1) establishment of a seed production business institution, (2) production of rice seeds, and (3) self-assessment of the performance of the seed production business institution. Institutional data were acquired through a questionnaire that references the European Foundation for Quality Management’s (EFQM) methodology. Three dimensions used were direction (purpose, vision, and strategy; organizational culture and leadership); execution (engaging stakeholders; coasting sustainable value; driving performance transformation); and result (stakeholder perceptions; strategic and operational performance). The study suggests essential findings: The organizational structure of rice seed producers formed is complete regarding its operational functions. The rice seeds produced by Gapoktan have met both the volume and quality standards. From a financial perspective, this rice seed production unit is feasible for further development. However, their social orientation is still relatively high and needs to be more profit-oriented. Uniquely, not all members buy and use Gapoktan seeds. As a result, additional efforts are necessary to provide exceptional service to Gapoktan members.
PROTACs targeting epigenetic proteins
Authors: Zhang Chao , He Yuna , Sun Xiuyun , Wei Wenyi , Liu Yanlong , Rao Yu
Published: December 2023

The field of epigenetics pertains to alterations in gene function that are inherited without changes in the DNA sequence, including histone modifications, post-translational modifications of amino acids, and covalent modifications of DNA bases. These alteration pathways modulate the transformation of genotypes into specific phenotypes. Epigenetics plays major roles in cell growth, development, and differentiation by dynamically regulating gene transcription and ensuring genomic stability. This regulation is performed by three key players: writers, readers, and erasers. In recent years, epigenetic proteins have been found to have crucial roles in epigenetic regulation, and have become important targets in drug research and development. Although targeted therapy is an essential treatment strategy, the effectiveness of targeted drugs is often limited by drug resistance, thus posing a major dilemma in clinical practice. Targeted protein degradation technologies, including proteolysis-targeting chimeras (PROTACs), have great potential in overcoming drug resistance and targeting undruggable targets. PROTACs are gaining increasing attention in the treatment of various epigenetic diseases. In this review, we summarize recently developed degraders targeting epigenetic readers, writers, and erasers. Additionally, we outline new applications for epigenetic protein degraders. Finally, we address several unresolved challenges in the PROTAC field, and suggest potential solutions from our perspective. As the field continues to advance, the integration of these innovative methods holds great promise in addressing the challenges associated with PROTAC development.
Optical and photoconductivity properties of Mn doped nanocrystalline PbS thin films deposited by chemical bath deposition method
Authors:   Department of Physics. D. M. College of Science, Imphal-795001, Manipur, India, Singh L. R. , Singh R. K. L. ,   Department of Chemistry, D. M. College of Science, Imphal-795001, Manipur, India, Hussain M. A. ,   Department of Physics, Imphal College, Imphal-795001, Manipur, India
Published: December 2023

Mn doped nanocrystalline PbS thin films were deposited onto glass substrates by chemical bath deposition (CBD) method. All the deposited thin films were found to be crystalline having cubic phase structure. The optical properties of the Mn doped nanocrystalline PbS thin films have been studied. They have high absorbance in the UV-visible region. The linear nature of (αhν)2 vs (hν) plots of PbS thin films confirmed that the transition is direct and the optical band gap energy of PbS films is found to increase from 1.90 eV to 2.28 eV with decreasing crystallite size from 21 nm to 11 nm and the optical band gap values are higher than the bulk value (0.40 eV). The optical band gap of Mn doped PbS films are found to increase with increase in dopant concentrations. The Photoconductive rise time and decay time determined from the prepared films are found to decrease with increase in doping concentrations.
Ionic transport study in [NaNO3]100-x:[Sr(NO3)2]x mixed solid electrolyte system
Authors:   Department of Physics, CVR College of Engineering, Hyderabad, India, Kumar T.V. , Kumar K. P. ,   Department of Physics, CVR College of Engineering, Hyderabad, India, Prathibha G. ,   Department of Physics, CMR College of Engineering & Technology, Hyd, India, Kumar N.H ,   Department of Physics, St. Peter’s Engineering college, Hyderabad, India, Rao B. H. C. ,   Department of Physics, Gokaraju Rangaraju Institute of Engineering & Technology, Hyderabad, India
Published: December 2023

Na+ ion-conducting solid electrolyte of sodium nitrate (NaNO3) and Sr(NO3)2 mixed crystals were grown by slow evaporation technique. XRD, FTIR, SEM characterizations and AC, DC conductivities were carried out on the pellets. Conductivity in these mixed solid electrolytes was noticed to increase with increase in m/o Sr(NO3)2 upto 14.68 followed by decrease. The conductivity in 14.68 m/o Sr(NO3)2 is more than one order of magnitude as compared to NaNO3 in the extrinsic region. Ionic transport in these mixed systems is explained.
Support of Cd doping in SnO2 nanoparticles to enhance its thermoelectric parameters
Authors:   Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan, Rehman N. U. , Hussain A. ,   Department of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan, Ali S. M. ,   Department of Physics and Astronomy, College of Science, P.O. BOX 2455, King Saud University, Riyadh 11451, Saudi Arabia, Ahmad J. ,   Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan, Buzdar S. A. ,   Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan, Mahmood K. ,   Department of Physics, Government College University, Faisalabad, Pakistan, Shah Z. A. ,   Department of Physics, Allama Iqbal Open University, Islamabad, P. O. Box 44310, Pakistan, Ali S. D. ,   Nanoscience and Technology Department, National Centre for physics, QAU campus, 45320, Islamabad, Pakistan, Shar M. A. ,   Department of Mechanical & Energy Systems Engineering, Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK
Published: December 2023

In the present study we have successfully synthesized undoped and Cd doped SnO2 nanoparticles using the Sol-gel method with different concentrations of Cd solutions, and Seebeck coefficient and electrical conductivity have been reported at various temperatures. The structural, morphological, thermoelectric and electrical properties of undoped and doped samples were by XRD, scanning electron microscopy, Raman spectroscopy, Seebeck effect and two point probe electrical measurement. XRD show the rutile tetragonal structure and the enhanced particle size in the range of 18.12 nm to 25.08 nm, and Raman active mode at 479cm-1 , 632cm-1 and 775cm-1 were measured by Raman spectroscopy. Morphology of the nanoparticles by using Scanning electron microscopy have revealed the random spherical shape and cluster formation of these nanoparticles. The maximum value of seebeck coefficient, electrical conductivity and power factor for 6% doped SnO2 samples were found to be -297.92μV/°C, 33.33Ω-1 m-1 and 0.129117 x 106 Wm-1 /°C2 , respectively. These results reveal that the Cd doped tin dioxide (SnO2) nanoparticles can be used as a good candidate for thermoelectric applications.
The concentration factor on the mixture of Ag paste and H3PO4 solution as a dopant paste for contact formation in silicon solar cells
Authors:   Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia, Sinin N. A. M. , Rais A. R. M. ,   Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia, Sopian K. ,   Department of Mechanical Engineering, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak Darul Ridzuan, Malaysia, Ibrahim M. A. ,   Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Published: December 2023

Screen printing dopant is a new technique to create emitter regions on solar cells. On top of the emitter region, there will be screen-printed metallic contacts that are commonly used silver as front contact. Both processes are performed in separate procedure which requires two different diffusion process involving a high-temperature process. Silver makes good ohmic contact on both light and heavily doped. A solution is proposed by applying a single step of screen printing and annealing process of Ag and phosphorus acid. Simultaneous annealing of Al, Ag, Ag/P screen-printed pastes form diodes with and without heavily doped phosphorous layers under Ag contacts on n-type and p-type silicon wafers by annealing at a constant temperature of 900℃ while varying annealing time from 10-40 seconds at a 10-second interval. The cross-section image of 5% and 10% of Ag/P was measured by using FESEM with EDX report has identified the presence of phosphorus in the Ag/P paste. Dark IV shows an ohmic contact for both p- and n-type. The ability to form the Ag/P paste in the screen-printing process makes it amenable to use as a self-dopant paste process in solar cells.
SECURING IOT HEALTHCARE APPLICATIONS AND BLOCKCHAIN: ADDRESSING SECURITY ATTACKS
Authors: MUHAMMAD UMAR DIGINSA  , Usman Sahnius , Sanchi Shahnurin Khanam , Idris Muhammad , Zagga Sadiq Abubakar
Published: December 2023

The Internet of Things (IoT) describes the connection of bodily devices as "things" that can communicate with other systems and devices through the Internet and exchange statistics (data or information), facilitating the exchange of data with other systems and devices. These devices have sensors, software, and various components designed to exchange data seamlessly within the IoT network. Securing and protecting the data transmitted over the Internet from unauthorized access is imperative to ensuring the integrity and confidentiality of the information. IoT Smart health monitoring systems, integral components of the IoT landscape, are susceptible to various attacks. These include denial of service (DoS), fingerprint, router, select, forwarding, sensor, and replay attacks, all of which pose significant threats to the security of these systems. As such, there is a pressing need to address and mitigate the vulnerabilities associated with IoT healthcare applications. This paper aims to explore the significant role of IoT devices in healthcare systems and provide an in-depth review of attacks that threaten the security of IoT healthcare applications. The study analyses the existing literature on the vulnerabilities present in smart health monitoring systems and the potential application of blockchain technology as a robust solution to enhance the security of IoT healthcare applications. This research reveals critical vulnerabilities in IoT healthcare applications and highlights blockchain's effectiveness in mitigating them, providing insights for robust security measures and strategic decision-making in secure healthcare systems. This paper provides valuable insight and recommendations for policymakers, researchers, and practitioners involved in the domain of the IoT healthcare system.
DISTRIBUTED VOLTAGE REGULATION IN ELECTRICAL GRIDS WITH RENEWABLE SOURCES OF ELECTRIC ENERGY
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Blinov I.V. , Trach I.V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Rybina O.B. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine
Published: December 2023

The problems of distributed voltage control in electrical grids (EGs) with renewable sources of electric energy with converter-interfaced generation (CIG). It is proposed to control the EGs modes by controlling the reactive power of converter-interfaced generation. It is proposed to use the mean square deviation of the voltage in the converter inter-faced generation (CIG) installation nodes as the criterion of the target function. The extremum seeking control method was used to solve the problem of dynamic optimization with daily changes in the parameters of the electric network, namely the loads and active power of renewable sources. The examples provided have shown the improvement of the voltage in the EG at different levels of reactive power generation limitation according to the norms of the standard EN50549-1:2019. The optimal values of the average daily value of the rms deviation of the voltage of the ieee33 test EM were obtained with a significant penetration of the RES power. Bibl. 12, fig. 4, table. Keywords.: distributed voltage control, converter interfaced generation, extremum seeking control method.
RETROSPECTIVE ANALYSIS OF THE VALUE OF THE FORECAST ERROR FOR THE CONSTRUCTION OF BALANCING GROUPS OF RENEWABLE ENERGY SOURCES PRODUCERS
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave. 56, Kyiv, 03057, Ukraine, Miroshnyk V.O. , Loskutov S.S. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave. 56, Kyiv, 03057, Ukraine
Published: December 2023

The significant increase in the installed capacity of power plants with renewable energy sources and the imbalance of the financial system of the wholesale electricity market of Ukraine prompted the Ministry of Energy to develop an alter-native support mechanism for RES producers. The introduction of a feed-in tariff (FIP), which compensates for the difference between the actual sale price of electricity and the "green" tariff, can help producers receive more money immediately after the electricity is released. However, studies have shown that exiting a balancing group without form-ing a new one can lead to increased costs associated with forecasting error. It is important for manufacturers to form independent balancing groups to compensate for negative consequences. The findings of the article show that there is no single optimal balancing group for all manufacturers, but some groups are often repeated. Switching to a separate balancing group can have a significant economic effect for the manufacturer, reducing the cost of forecasting error compared to being solely responsible for the imbalance. However, the balancing group determined by the method of retrospective calculation of the cost of the forecast error is not stable in the long term. Ref. 8, fig. 2, tab. 3 Key words: renewable sources, electricity market, short-term forecasting, forecast interval, deep learning neural net-works, cost estimation.
MONITORING SYSTEMS FOR MODERN POWER CABLE LINES
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine, Kucheriava I.M.
Published: December 2023

The overview of fiber-optic technologies for real-time monitoring of the technical condition and operational characteristics of modern power cables with cross-linked polyethylene insulation and with the fiber-optic module integrated into their structure is presented. In particular, the new intelligent means for monitoring of the temperature, load current, deformation (mechanical damages), partial discharges in the insulation, moisture penetration inside the cables and control over sheath voltage limitation are described. The topicality of using and developing the technologies of smart diagnostics for power cable lines in order to achieve the effective and safe operation of cables as well as the high reliability of networks is shown. Ref. 47, fig. 7. Key words: power cables, power cable lines, cross-linked polyethylene insulation, integrated fiber-optic modules, power networks, smart monitoring.
MEASUREMENT OF EFFORT IN THE STATOR CORE TIGHTENING PRISMS OF POWERFUL TUR-BOGENERATOR USING DATA ON THE MOVEMENT OF THE COMPRESSION DISC SPRING BLOCK IN PRESSURE ACCUMULATOR
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03680, Ukraine, Levitskyi А.S. , Zaitsev Ie.O. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03680, Ukraine, Kobzar K.O. ,   JSC Ukrainian Energy Machines, Heroiv Kharkiv ave., 199, Kharkiv, 61037, Ukraine, Sorokina N.L. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03680, Ukraine
Published: December 2023

The advantages and features of the use of pressure accumulators (CA) with blocks of conic springs for restoring and stabilizing the pressing pressure of the stator core of a powerful turbogenerator (TG), which are installed under the tightening nuts or instead of them on the threaded ends of the tightening prisms of the core, are described. It is shown that the measurement of the displacement of the compression disc spring in the CA makes it possible to estimate the current state of the pressing pressure. The use of a capacitive sensor of linear displacements, placed outside the CA, to control the movement of the spring block in the caseless CA is substantiated. According to the specified design parame-ters of the caseless CA and the value of the maximum stroke of the plate springs in it, a capacitive sensor with its speci-fied characteristics was developed. The method of monitoring the state of the TG stator core using the CA system with capacitive sensors on each CA and the control method with the alternate use of one disk spring travel meter are de-scribed. Ref. 14, fig. 6. Key words: powerful turbogenerator, stator core, pressure, forces in the tightening prisms, power accumulator, displacement of block compression disc spring, capacitive sensor.
Influence of gold nanostructures on excited state intramolecular proton transfer in multidomain HTTH dye
Authors:   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41, prosp. Nauky, 03680 Kyiv, Ukraine, Hudzenko I.I. , Lopatynskyi A.M. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41, prosp. Nauky, 03680 Kyiv, Ukraine,   Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., 01601 Kyiv, Ukraine, Chegel V.I. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41, prosp. Nauky, 03680 Kyiv, Ukraine,   Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., 01601 Kyiv, Ukraine
Published: December 2023

Organic multidomain dyes exhibiting excited state intramolecular proton transfer (ESIPT) are known due to large Stokes shifts and dependence of their luminescence spectral characteristics on the properties of the environment. In this work, influence of gold nanostructures on the spectral characteristics of a “polycarbonate matrix – gold nanostructures – HTTH” system was studied using thiazole dye HTTH as an example. A hypothesis about the possibility of plasmon resonance energy transfer (PRET) between the HTTH molecules in different states, namely the ground state (enol form) and the state after proton transfer (keto form), mediated by gold nanostructures was experimentally tested. Presence of gold nanostructures in the vicinity of HTTH molecules was found to lead to the changes in the ratio of the luminescence peak intensities for the enol and keto form of these molecules. This phenomenon opens up the possibility of additional regulation of the spectral characteristics and may evidence the PRET effect in the systems containing ESIPT-exhibiting dyes and plasmonic nanostructures. The obtained results improve our understanding of the physical processes in the systems similar to the studied one and imply new practical applications of them such as fabrication of organic light-emitting diodes, sensors, super-resolution microscopy tools and ultraviolet-to-visible radiation convertors.
Increasing Chlamydia and Gonorrhea Testing for Adolescents in the Pediatric Emergency Department
Authors: Vayngortin Tatyana , Gracia Michael , Clark Katie , Vayngortin Beata , Bialostozky Mario , Heitzman Lindsay , Hollenbach Kathryn , Kumar Maya , Titchen Kanani , Bryl Amy
Published: December 2023

OBJECTIVE

Adolescents who use the emergency department are more likely to engage in high-risk sexual activity and are at an increased risk of sexually transmitted infections. We aimed to increase testing for Chlamydia and gonorrhea from 12% to 50% among adolescents presenting to our pediatric emergency department with at-risk chief complaints over 12 months.

METHODS

Plan-Do-Study-Act cycles were initiated in July 2020. A multidisciplinary team reviewed preexisting data and developed interventions to increase Chlamydia and gonorrhea testing in teens with at-risk complaints, including genitourinary and behavioral health complaints, and females with abdominal pain. Two categories of interventions were implemented: education and electronic medical record optimization. Process measures were the proportion of patients with a documented sexual history and the proportion of patients tested with a documented confidential phone number. Secondary outcome measures included the weekly number of positive test results and the proportion of patients testing positive who were contacted to arrange treatment. Statistical process control charts were used to examine changes in measures over time.

RESULTS

Within 14 months of project initiation, the proportion of at-risk patients tested increased from 12% to 59%. Teen phone number documentation remained unchanged from 23%. Sexual history documentation remained unchanged from 46%. The number of positive test results increased from 1.8 to 3.4 per month, and the proportion of patients testing positive who were contacted to arrange treatment remained unchanged at 83%.

CONCLUSIONS

We surpassed our goal and increased the proportion of at-risk patients tested for Chlamydia and gonorrhea to 59%, sustained for 4 months from the last intervention.
Sounds From a Base Camp
Authors: Hackl Maria , Kaudela Veronika , Käfer Bernadette
Published: December 2023

Since the discovery of a fragmented Ice Age wind instrument was made in 1994 at a base camp of Palaeolithic reindeer hunters in Grubgraben/Kammern in Lower Austria, different attempts of reconstructing the aerophone have been conducted. Due to the fact, that both ends of the bone are broken predepositionally, varying options of reconstructions have been discussed since 1997. The most prominent research questions remain: How was the instrument likely played, how did it soundand how can the sonic results of reconstruction experiments be displayed and interpreted? This paper will build a bridge from the first detailed research, carried out in the late nineties, to today’s more wide-spread field of scientific research on Palaeolithic aerophones in order to shift the attention to possibilities of reconstructing the Grubgraben artefact additional to those first attempts and to contextualise it. In the course of this, the main focus is on studies of the instrument as an end-blown flute and the resulting tonal properties and pitch ranges, as they were presented and discussed at the 11th Symposium of the International Study Group on Music Archaeology in Berlin in November 2021by Author 1 and Author 2