bluuebunny/crossref_metadata_2025 huggingface dataset:
Achieving Maximum Filler Retention by Improving Chemical and Mechanical Retention
Authors:   Innventia AB, SE- 114 86 Stockholm, Sweden, Krochak Paul , Athley Karin ,   Innventia AB, SE- 114 86 Stockholm, Sweden, Björk Elisabeth ,   Innventia AB, SE- 114 86 Stockholm, Sweden, Norman Bo ,   Innventia AB, SE- 114 86 Stockholm, Sweden
Published: February 2024

Conditions for maximizing chemical and mechanical filler retention were studied through a combination of laboratory, semi-pilot and pilot scale experiments. In the first part of this work, we investigated the impact of particle size on the mechanical retention of particles in a fibre network using a modified laboratory hand sheet former. Quartz particles of well-defined and narrow-size fractions were used to simulate pre-flocculated filler of different sizes. Five different size fractions were studied. The mechanical retention was found to increase linearly with both web fibre grammage for each quartz fraction and with particle size. These results were then validated through pilot- scale production trials where different filler floc sizes were created through pre-flocculation techniques. In the second part of this work, we studied the stability of pre-flocculated filler flocs through a set of semi-pilot scale ow loop trials. Trials were performed by pre-flocculating filler (PCC) with flocculating agents continuously and exposing the filler flocs to controlled levels of hydrodynamic shear created by ow through a partially closed gate valve. Changes in filler floc size were monitored continuously using Focused Beam Reflectance Measurements (FBRM). A clear reduction in the particle size was observed as the pressure drop increased. A major part of the floc degradation occurred at relatively low shear conditions while under the highest shear conditions, the pre-flocculated PCC floc size was reduced close to the unflocculated state. In the third part of this work, we investigated the effect of different forms of process related shear on retention polymer stability and its effect on chemical retention. A set of semi-pilot scale ow loop trials were performed to investigate the effect of elongational shear-strain and shear due to velocity differences created inside and outside a dosage nozzle respectively. We show that the effect of elongational strain created inside the dosage nozzle leads to significant retention polymer degradation while shear created outside the dosage nozzle due to velocity gradients has a smaller effect on polymer degradation. We investigate these results with a series of pilot scale production trials and show that high shear conditions created inside the dosage nozzle leads to significant reductions in chemical filler retention. However, pilot trials indicate that shear created outside the dosage nozzle can also have a significant effect on filler retention, although to a lesser extent.
Some Fundamental Aspects of Pulp Screen Capacity
Authors:   Department of Mechanical Engineering, The University of British Columbia, Salem H. J. ,   The Pulp and Paper Centre, The University of British Columbia, Gooding R. W. ,   Department of Mechanical Engineering, The University of British Columbia; The Pulp and Paper Centre, The University of British Columbia; Aikawa Fiber Technologies, Martinez D. M. ,   The Pulp and Paper Centre, The University of British Columbia; Department of Chemical and Biological Engineering, The University of British Columbia, Olson J. A. ,   Department of Mechanical Engineering, The University of British Columbia; Department of Chemical and Biological Engineering, The University of British Columbia
Published: February 2024

Pulp screens remove contaminants from pulp suspensions and are critical to the production of high-quality paper products. Screen performance is determined by two internal components: a cylinder with apertures that pass acceptable fibres and block oversize contaminants, and a rotor that clears the apertures of any blockages. Capacity is an essential parameter of screen operation and a necessary consideration in evaluating changes made to enhance debris removal or reduce power consumption. The present study uses a pilot pulp screen to assess capacity limits, and a specialized laboratory screen with a-high-speed video camera to study what happens at a screen aperture. What results is an understanding of some mechanisms related to the deposition and removal of fibres at an aperture where there is a time- varying ow bifurcation, and which is proposed herein as the essence of screen capacity.
Local Structural Orientation of Towel and Tissue Grades in Two and Three Dimensions
Authors:   Miami University, Department of Chemical, Paper, and Biomedical Engineering, Oxford, OH, USA, Keller D. S. , Feng C. ,   Miami University, Department of Chemical, Paper, and Biomedical Engineering, Oxford, OH, USA, Bloch J.-F. ,   Grenoble Institute of Technology, 38402 Saint Martin d’Hères, Cedex, France, Roland du Roscoat S. ,   Université Joseph Fourier, Domaine Universitaire, 38041 Grenoble Cedex, France
Published: February 2024

This paper describes the study of new methods for characterizing the orientation of fiber segments in low density paper towel from two- and three-dimensional X-radiographic data sets. The end use properties of the absorbent hygiene grades such as paper towels and tissues stem from an open porous structure where stochastically distributed fibers are contorted by post forming processes to increase bulk, stretch, flexibility and softness, while maintaining adequate strength. The orientation of free fiber segments that form the network are kinked and curved in three dimensions by processes including creping, through air drying and embossing. Providing a linkage between process conditions and the end use properties through the characterization of the network structure is the overarching goal of this investigation. A method is presented for mapping the 2D, in-plane orientation of fiber segments using soft (6kV) X-radiographs and an algorithm for calculating the image moments for circular sub-regions that surround each point. The eigenvectors form the major and minor axes of the inertial ellipse from which the principal orientation may be extracted. Colorized maps representing the local orientation are used to examine the effects of embossing and creping, as well as comparing different forming processes. A method for characterizing fiber segment orientation in three dimensions uses a similar approach applied to binarized X-ray micro-computed tomographic data sets. The inertial ellipsoid is determined by performing principal component analysis on the covariance matrix of the voxels contained within a spherical region surrounding each solid voxel within the structure. The eigenvectors are used to extract the shape and principal orientation of the ellipsoids which are plotted as colorized representations in 3D space. The 2D and 3D plots demonstrate the sensitivity of the method to orientation of fiber segment mass, while mean fiber orientation plots reveal differences between samples.
The Heat of Sorption in Paper Drying – An Investigation of Measurement Methods and Influence of Pulp Parameters
Authors:   Institute for Paper-, Pulp and Fibre Technology, Graz University of Technology, Austria, Schneeberger M. , Leuk P. ,   Institute for Paper-, Pulp and Fibre Technology, Graz University of Technology, Austria, Hirn U. ,   Institute for Paper-, Pulp and Fibre Technology, Graz University of Technology, Austria, Bauer W. ,   Institute for Paper-, Pulp and Fibre Technology, Graz University of Technology, Austria
Published: February 2024

When the dry content during pulp drying reaches a level above 75% to 80% the free water, i.e. unbound water, has been evaporated. The remaining water is bonded to the surface due to physisorption, additional energy is necessary to overcome these bonding effects. This additional energy is called heat of sorption. At 80 degrees C and a dry content of 95% for unbleached softwood kraft pulp the evaporation energy increases up to 2800 kJ per kg water compared to the latent heat of water of about 2300 kJ/kg at the same temperature. Different measuring methods to determine the heat of sorption HS are described in the literature, the reported values for HS of pulp show large differences. The first aim of this work is to compare the results of different measurement methods using the same sample pulp. We investigated calculation of HS from sorption isotherms collected with a conventional climate chamber (ESC) and differential vapor sorption (DVS) analysis. Furthermore we applied direct measurement of the heat flux generated by sorption using differential scanning calorimetry (DSC), differential scanning calorimetry combined with thermogravimetric analysis (DSC/TGA) and reaction calorimetry (RC). All but one measurement method delivered consistent results in the range of HS=40 kJ/kg to 70 kJ/kg additional energy due to surface sorption. The advantages and disadvantages of the different measurement techniques are discussed. In the second part of this work the impact of pulping and pulp treatment on the heat of sorption has been investigated. Refining and bleaching seems to have no impact. Pre drying reduces the overall heat of sorption by 15 %. The addition of inorganic fillers to paper reduces its heat of sorption due to a negligible HS of the filler. In conclusion the total additional energy caused by sorption effects is less than 2% of the overall energy necessary to fully dry the pulp. Additionally the heat of sorption is nearly unaffected by pulping, bleaching, refining or pre-drying of the pulp. Therefor the heat of sorption HS is playing only a minor role for industrial applications of paper drying.
Rheological Characterization of Micro-Fibrillated Cellulose Fibre Suspensions Using Multi Scale Velocity Profile Measurements
Authors:   VTT Technical Research Centre of Finland, P.O. Box 1603, FI- 40101, Jyväskylä, Finland, Salmela Juha , Haavisto Sanna ,   VTT Technical Research Centre of Finland, P.O. Box 1603, FI- 40101, Jyväskylä, Finland, Koponen Antti ,   VTT Technical Research Centre of Finland, P.O. Box 1603, FI- 40101, Jyväskylä, Finland, Jäsberg Ari ,   VTT Technical Research Centre of Finland, P.O. Box 1603, FI- 40101, Jyväskylä, Finland, Kataja Markku ,   VTT Technical Research Centre of Finland, P.O. Box 1603, FI- 40101, Jyväskylä, Finland
Published: February 2024

A rheometric method based on velocity pro ling simultaneously by optical coherence tomography and the ultrasound velocity profilometry was introduced and used in a preliminary study of the rheological and boundary layer ow properties of micro fibrillated cellulose. The two velocity pro ling methods appear adequate and complementary for rheological characterization of opaque complex fluids. The ultrasound method is useful in measuring the velocity profile in the interior parts of the tube, while the optical technique is capable of high-resolution measurement of the boundary layer ow close to the tube wall. The preliminary results obtained for a 0.4% micro-fibrillated cellulose suspension show typical shear thinning behaviour in the interior part of the tube while the near wall behaviour shows existence of a slip layer of thickness ~200 m. Both the velocity profile measurement and the imaging mode data obtained by the optical coherence tomographic method indicate that the slip layer is related to a concentration gradient appearing near the tube wall. In a sublayer of thickness ~100 m, the fluid appears nearly Newtonian, and the viscosity value approaches that of pure water with decreasing distance from the wall.
The Effect of Moisture and Structure on Wet Web Strength and Its Variation – A Pilot Scale Approach Using Dry and Rewetted Mill Made Papers
Authors:   UPM-Kymmene Corporation, Research Centre, FI-53200 Lappeenranta, Finland, Ora Markku , Maloney Thaddeus ,   School of Chemical Technology, Aalto University, FI-00076 Espoo, Finland
Published: February 2024

In spite of extensive research on wet web strength properties and rheology, knowledge of the effect of web structure, e.g. formation and fibre orientation, on wet web strength properties has been limited. Therefore the topic was studied by running the re-wetted mill-made paper reels on a pilot runnability device at low dry solids contents of 56% and 68%. In addition, one trial was conducted by measuring the wet web strength properties in situ on the press section of a pilot Fourdrinier. The bene t of both these approaches is the ability to measure the strength properties in more realistic conditions compared with standard laboratory methods. In order to differentiate between the effect of formation and fibre orientation on strength properties, the variables should not be correlated. This requirement was met in the main mill trial by suitably selecting the headbox and wire section parameters. Formation was measured using a -radiographic method and local grammage variation was examined as standard deviation in different wavelength bands and size classes. In addition, formation was also measured with Ambertec formation tester. Fibre orientation was determined using layered fibre orientation measurements. It was shown that formation has an influence on the tensile strength variation and the effect depends on the scale of formation and dry solids content. In contrast to dry strength, the wet strength does not follow the Weibull distribution, but rather the Gaussian one. In addition, the distribution of wet strength is sensitive to centimetre-scale variability in paper structure instead of millimetre-scale in dry paper. When formation is good, as it typically is on modern paper machines, further improvement does not improve average wet strength properties. Only when large scale formation is poor, it has an influence on average wet web tensile strength and tensile stiffness. Presumably this would be the situation on a Fourdrinier type machine. Unlike formation, anisotropy does not affect the strength variation but it has an influence on the average tensile strength and tensile stiffness of wet and dry papers. The anisotropy profile in z-direction has no influence on the mentioned properties.
Preparation and Characterization of Spherical Nanosized Cellulose by Enzymatic Hydrolysis of Pulp Fibers
Authors:   State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Chen Xiao-Quan , Deng Xue-Yan ,   State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Shen Wen-Hao ,   State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Jia Meng-Yu ,   State Key Laboratory of Pulp and Paper Engineering, South China University of Technology
Published: February 2024

In this work, the pulp fibers were enzymolyzed to prepare the nano-sized cellulose (NC). The as-prepared samples were characterized by optical microscopy, electron microscopy, and Raman spectra. The experimental results indicated that enzymatic hydrolysis of pulp fibers could produce the spherical NC with a mean particle size of about 30 nm, which has the excellent monodispersity and uniformity. When the concentration of complex enzymes was 20 u/mL (cellulase: xylanase = 9:1), the yield of NC was 13.6%. The single cellulase was used, even if the concentration and time reached up to 200 u/mL, only a mixture of trip and granular flocculation were obtained. The positive synergistic effect between xylanase and cellulase could be due to the enzymolysis of hemicellulose located on the cellulose microfibers to favorable of cutting and splitting of the microfibers by the endoglycannase in cellulase. Otherwise, the additive copper sulfate could decrease formation of reducing sugar effectively.
Determination of Length and Width of Nanocelluloses from Their Dilute Dispersions
Authors:   Department of Biomaterials Sciences, The University of Tokyo, Isogai Akira
Published: February 2024

Length/width and their distribution of nanocelluloses, prepared from wood pulps with or without chemical pretreatment, are key factors in application to high-strength and light-weight composites, transparent optical films, gas-barrier films, electronic devices, etc. Although microscopy images provide some length/width information, the number of measurable nanocellulose elements is limited. In this paper, three methods to determine nanocellulose lengths and widths are presented. The field-flow-fractionation (FFF) method combined with static light scattering was applied to dilute aqueous TEMPO-oxidised cellulose nanofibril (TOCN) dispersions to obtain avarage lengths, length distributions, and widths of different TOCNs. Although TOCN elements with lengths > 300 nm could not be separated properly according to their lengths by the FFF system, TOCNs with lengths < 300 nm were adequately separated, depending on the lengths by the FFF system, and provided length/length distributions and widths, well corresponding to those obtained from microscopy images. Intrinsic viscosities of TOCNs with different lengths and widths were obtained viscosities of TOCNs with different lengths and widths were obtained using shear viscosity measurement of dilute aqueous TOCN dispersions.
Impact of the Panama Canal on the Panamanian economy: analysis with input-output tables
Authors: Valverde Batista Reyes Arturo
Published: February 2024

The effects of canal activity not only prevent a greater economic contraction derived from the pandemic, but also allow for rapid economic recovery in Panama. The objective of the study is to determine the economic impact of the Canal in relation to production, added value, employment and salary income. The methodology used is the analysis of direct, indirect and induced impact attributed to the Input-Output Tables (IOT) method, for which the 45X45 IOTs have been developed in the years 2019, 2020, 2021 and 2022, incorporating the financial information from the Panama Canal Authority and the Supply and Use Tables at 2018 prices and with chained volume measurements provided by the National Institute of Statistics and Census. The results indicate that at the time of the considerable economic contraction in the country, estimated at 17.9%, the Canal grew by 7.2% of its production compared to fiscal year 2019, maintaining that the weight of this activity for this referenced year reached 5.5% of the GDP when adding indirect and induced effects; while in 2020 it reached 7.6%, gaining 2.1 units of this magnitude. For its part, the added value exceeds the growth in production, setting an evolution in its growth of 11.1%, with a less intense participation than in production, going from 4.2% in 2019 to 5.8% in 2020 of the value total added; However, the results in employment and salary income show a different dynamic when compared to 2019, with the former falling by 2% and the latter by 5%, considering that by 2019 canal employment included all the effects between 0.5% and 1.2% of total employment; improving this relationship in 2020 with a range between 0.6% and 1.5%. In subsequent years, the behavior of this service activity provides an important contribution to the aforementioned indicators in the country, ignoring the negative impacts of the container crises, the war between Russia and Ukraine; and the increase in interest rates.
Population awareness regarding D vitamin and its role in immunomodulation in the COVID 19 Pandemia
Authors: de Almeida Bernardo M Machado , Cardoso Carolina Queiroz , Saldanha Anita L R , Scartezini Marileia , Klosovski Caio Corsi , Pantoja Margeotto Ana Paula , Gasparoto André L V , Pereira Abel , Bellincanta Tereza Luiza , Rocha Martinez Tania Leme da
Published: February 2024

International and national official surveys and publications have documented dietary deficiencies that may have deleterious repercussions to immunomodulation. Brazilian population that sought spontaneously for D Vitamin pre and since the Covid 19 pandemia was specially studied using databases collected throughout Brazil. The number of people that sought for their D vitamin levels were three times bigger during the pandemia. The mean D vitamin levels were significantly lower in the pandemic period as compared to the pre pandemic. Of the total of 1,421 tests performed in the observed period, 25.2% were performed in 2019 (prepandemic) and 74.8% were performed in 2020 or 2021 (pandemic). Most of the individuals tested were women over 20 years of age. The proportion of individuals over 60 years was higher in 2020-2021, compared to 2019 (12% vs. 39.5%). There was no significant difference in D vitamin mean between cohorts by gender, age or region. These results point to the awareness of having to live a healthy nutritional lifestyle and even follow guidance for supplementation.
Considerations on job satisfaction as a predictor of employment success for people with severe mental illness
Authors: Pulido Francisco Rodríguez , Melián Cartaya María Jesús
Published: February 2024

In the psychosocial rehabilitation of people with severe mental illness (SMI), employment is an ingredient in the process of recovery and human rights, given the numerous benefits generated in each of the personal and social dimensions. Existing research has tried to determine the variables that favour or hinder access to the labour market by studying the experiences reported by people with SMI in ordinary employment. However, the results obtained do not allow us to reach a clear consensus on the variables that determine the success of the employment experience. The job satisfaction is presented as a variable to be studied in depth due to the few studies on this topic. We must insist on this issue because of its predictive nature. This paper provides a review of studies on job satisfaction as a predictor of success in the regular employment of people with TMG, for which different databases were consulted from 2010 to 2021.
Brazilian hug lips: a new approach to treating inverted and atrophic lips with hyaluronic acid
Authors: Rossi Ticiano , Virginia Sardenberg Cyntia
Published: February 2024

Background: Inverted and atrophic lips are always a major challenge when we opt for treatment with hyaluronic acid. In most cases, the correct indication would be surgical correction (Liplifting). However, we bring a new technique to provide improved lip inversion with aesthetically natural results. Methods: Six female patients aged between 30-80 years old and without any previous lip treatment were selected. The application of hyaluronic acid was carried out following the criteria developed by the authors, and deposition of hyaluronic acid using the C-shaped technique or "embrace" technique (HUG lips). Results: By following the technique and quantities (ml) of hyaluronic acid described, we achieve natural and satisfactory results for lip eversion. Conclusion: According to our study, we observed an improvement in lip definition, correcting atrophic lips, without the need for surgery, with a high level of satisfaction among treated patients.
NATTOKINASE – USES AND BENEFITS
Authors: Hristova M.
Published: February 2024

Nattokinase has been one of the most widely discussed and researched extracellular enzymes since it was first introduced in 2005. Nattokinase belongs to the subtilisin family and is a proteolytic enzyme (serine protease) with a powerful fibrinolytic effect. Nattokinase is purified and extracted from fermented soybean seeds under the effect of the Bacillus subtilis (Natto) bacteria. Its main natural source is the fermented vegetable cheese called natto, which is a traditional Japanese food consumed in Japan for more than 2000 years (1).
All over the world, natto is regarded as a fibrinolytic miracle food. The enzyme discovery became a fact thanks to the Japanese scientist Hiroyuki Sumi, a researcher at the Medical University in Chicago, who in 1980 after testing more than 173 natural foods as possible thrombolytic agents(2), discovered that natto possesses the ability to break down artificial fibrin in vitro. Later in 1987, Sumi and his team introduced the new fibrinolytic enzyme, extracted from natto, and named it nattokinase (NK), known also as subtilisin NAT. The major interest in the enzyme is namely because of its direct fibrinolytic activity, provided that it remains stable in the gastrointestinal tract after oral administration. This determines it as a highly valuable, safe and easy-to-use nutraceutical with a wide area of medical applications for the treatment of thrombotic, neurological and dyslipidemia conditions, arterial hypertension, diabetes mellitus, atherosclerosis, hemorrhoids, endometriosis, uterine fibroids, muscle spasms, infertility in reproductive medicine and obstetrics.
SURGICAL TREATMENT OF COMPLEX META-DIAPHYSEAL TIBIAL FRACTURES – CURRENT STATE OF THE ART AND NEW TREATMENT MODALITIES
Authors: Makelov B.
Published: February 2024

Fractures of a meta-diaphyseal region of the tibia are still challenging in terms of safe, fast, minimal invasive, low - risk surgical treatment. The unstable meta diaphyseal tibial fractures affect proximal and distal one-third of the tibia and result from high-energy trauma, usually combined with severe soft tissue injury. Treatment strategies include mostly operative approaches with various contemporary surgical instrumentations and modern techniques for definitive fracture repair, achieving primary or secondary bone union and better quality of life for patients. In the last decade, new techniques for definitive external plate fixation have been introduced as a part of contemporary trauma armamentarium with good and excellent outcomes.
OXIDATIVE STRESS AND INFLAMMATORY BOWEL DISEASE IN PEDIATRICS
Authors: Panayotova M.
Published: February 2024

Inflammatory bowel diseases (IBD) are chronic, idiopathic and complex diseases of the gastrointestinal tract. Their two most common forms are ulcerative colitis (UC) and Crohn’s disease, (CD).
The incidence and prevalence of IBD increase, the age profile of IBD patients is also changing, in a direction that includes childhood. C-reactive protein (CRP) and calprotectin have been traditional inflammatory markers in IBD. The primary diagnostic tool in the hands of gastroenterologists remains endoscopy, which is an invasive, expensive, and patient-unwanted procedure. Furthermore, a wide range of diseases, from malignant and infectious to functional, can present with similar symptoms as IBD. This makes the diagnostic process even more complicated and requires a wide range of laboratory and instrumental studies, takes a lot of time and money.
The oxidative imbalance presence in patients with IBD has been demonstrated. In addition, some markers of oxidative stress in IBD have the potential to become markers for the differential non-invasive diagnosis of inflammatory bowel diseases (IBD and CMA) and would shorten the time to diagnosis. Further, would become a suitable method for monitoring inflammation and the effect of treatment in these diseases.
Social History of the Parongpong Tablighi Jamaat (1985-2023)
Authors: Hakim Ajid
Published: February 2024

There are several interesting things about the Tablighi Jamaah (hereinafter referred to as JT) movement. This interesting phenomenon includes, first, the da'wah method. JT's preaching method is considered unique and contradictory by some laypeople. In his preaching method, it is necessary to leave the family for a certain time. So this method requires members to leave work and family. This, of course, has an impact on the family's livelihood and productivity. Meanwhile, earning a living for the family is considered a sharia obligation. This is the first contradictory and unique condition. However, on the other hand, this co-contradictory condition is followed by other conditions. No method of preaching exceeds the speed carried out by JT. Suddenly, after going out (khuruj) for 3 days, he suddenly became a brother of worship and regretted his sins in the past. This condition of spiritual change certainly cannot be carried out by individuals or other religious organizations. This event only occurs in the JT tradition.
Optimizing yeast strain selection for mulberry wine fermentation: a performance-based approach
Authors: Luo Bangzhou , Yang Yuxin , Lin Qiao
Published: February 2024

This study focused on identifying the optimal yeast strain for Dechang mulberry wine fermentation blended through a multi-stage evaluation process using five commercial yeasts. Initially, the Durham tube fermentation method and weight-based analysis were employed for initial screening. Subsequently, a secondary evaluation involving physical, chemical, and sensory assessments was conducted. The final stage assessed yeast tolerance to ethanol and sulfur dioxide (SO2), and the wine’s volatile compounds were analyzed using gas chromatography-mass spectrometry. The L13 yeast strain emerged as superior, demonstrating efficient fermentation initiation, rapid primary fermentation, and production of a desirable wine profile, including optimal sugar, acid, and alcohol levels. Notably, the L13 yeast strain showed resilience, tolerating up to 11% ethanol and 170-mg/L SO2 within 7 days, and contributed to a rich aromatic profile with 23 volatile compounds, including 13 esters. These attributes render the L13 strain particularly suitable for producing mulberry wine with robust fermentation characteristics and a complex aroma, enhancing both quality and sensory appeal of the final product.
Anthropometric studies of dancers’ feet
Authors: Karaseva Alina , Kostyleva Valentina , Burtsev Anatoly
Published: February 2024

The article presents an analysis of the results of anthropometric studies of a group of dancers specializing in the performance of pop-folk dances, which is necessary for the further development of a scientifically based design of special shoes. The features of dance shoes, the requirements for them, the nature of the loads on the feet during the performance of folk dance are shown. As part of the research work, anthropometric studies were carried out using a computer plantograph PKS-01. From the feet of a group of dancers, data were taken before classes and after the rehearsal. Primary processing of the data obtained made it possible to identify changes in the parameters of the feet of the subjects. The data obtained are systematized according to various criteria. The subjects were divided into groups of «right-handed», «left-handed» and «ambidexter» (a person who does not have a dominant arm or leg to perform an activity; the functioning of both arms or legs is equally developed, actions are performed with the same strength, speed and accuracy). With such a systematization, the dependence of changes in the parameters of the feet on the nature of the loads was noted. The result of the study is systematized data, as well as preliminary conclusions, on the relationship between changes in the longitude-latitudinal parameters of the foot and compensatory reactions of the corresponding muscles of the body to the loads experienced by the «leading» limb.

This approach is being developed within the framework of the master’s program «Development of the design and manufacturing technology of various types of special footwear» and is expected to be introduced into the educational process of the department «Artistic modeling, design and technology of leather products», RSU A.N. Kosygin (Technology. Design. Art) in the form of a textbook, in accordance with the Research Plan of the Russian State University. A.N. Kosygin for 2019–2023, problem 1. «Matrix approach to the formation of digital industry 4.0 at industrial enterprises of the textile and light industry», the implementation of theme No. 1.2 «Development of the innovative potential of enterprises for the production of leather goods based on modern digital design technologies and rapid prototyping».
The concept of developing collections of shoes and accessories of a class «Lux» with use of the modular transformation
Authors: Karaseva Alina , Kostyleva Valentina
Published: February 2024

Today’s situation is such that a small number of you can create a variety of transformable items ensembles. Clothing constantly undergoes changes, becomes multi-functional, versatile, easily modifiable that saves money and consumer’s living space. Clothing and shoes they must be not only ergonomically, but also psychologically comfortable, so that it involves entering a fundamentally new position in the design process products’. The multiplicity of the subject ensemble is firmly included in our life. Completing the elements of the costume and its use turn into creative process. Today every single product provides the possibility of combinatorics, transformation, and various combinations of elements. The development of multifunctional products allows you to expand the range and increase the competitiveness of manufactured products products. The article shows the necessary stages of design activities in the development of new products with transformable elements, presents the process of sketch design with a detailed study of the artistic image using metonymy as a means of graphic transformation of the object.

The purpose of the article is to present the developed collection of shoes using a modular transformation method that corresponds to aesthetic and ergonomic properties, as well as to show the success of the developed conceptual approach to creating transformable Shoe designs, including a retrospective review, interactive design based on analog models and production of experimental samples. This approach was developed in the framework of the dissertation for the candidate of technical Sciences Karaseva A.I. since 2014, and introduced into the educational process of the Department of «Artistic modeling, design and technology of leather products» of the Kosygin Russian state University (Technology. Design. Art) in the form of several textbooks and monographs.
A study of consumer preferences in professional dance shoes
Authors: Kostyleva Valentina , Karaseva Alina , Burtsev Anatoly , Sulaimanova Dinara
Published: February 2024

The article presents the results of a marketing research conducted to identify consumer preferences when choosing shoes for professional dancing. The study is part of an integrated approach to the study of the most important parameters in the design and improvement of special footwear for dancers.

The survey involved artists of various dance groups, including ensembles with a worldwide reputation, such as the State Academic Choreographic Ensemble «Berezka» named after N.S. Nadezhdina, the Academic Song and Dance Ensemble of the National Guard of the Russian Federation, as well as students of specialized dance universities and schools. The respondents also included dancers who had taken part in our earlier anthropometric study.

The selected method of collecting sociological information based on the use of Internet technology was carried out in the form of an interactive questionnaire located on an electronic resource. The method has a number of advantages, including the ability to fill in from a computer or mobile device online, unlimited in time, which is an important factor in obtaining full-fledged objective results among creative youth with a heavy workload in the educational and rehearsal process.

According to the results of the study, the most important properties of shoes for consumers were identified, such as the materials from which various models of «jazz shoes» are made, the correspondence of the internal shape of the shoe to the individual foot, the areas of the shoe design where dancers experience discomfort during operation, as well as the most popular models of «jazz shoes». The data obtained through the survey opens up the prospect of improving the design of «jazz shoes».
The study of the functioning of the style of ballet stage costume in everyday wardrobe products
Authors: Karaseva Alina , Kostyleva Valentina , Korzh Kseniya , Roshchupkina Darya
Published: February 2024

The article presents the results of a study of the functioning of dance style in everyday shoes, clothing and accessories, conducted in order to identify consumer preferences in the field of stylized wardrobe products. At the stage of developing the concept of designing shoes in the style of a ballet costume, an online survey was conducted. This type of survey provides respondents with the maximum level of convenience, since they can answer the questionnaire questions according to their pace, chosen time and preferences. The developed questionnaire for the study of consumer preferences regarding models of pumps as a popular type of footwear is designed to identify the most popular factors when purchasing casual shoes, such as: the relevance of the model, the material used in the manufacture, the style and cost of shoes. Based on the results, we can conclude about the relevance of ballet style in modern shoes, clothes and accessories, both women’s and children’s wardrobes.

This approach is being developed within the framework of the master’s thesis Korzh K.V. and is supposed to be introduced into the educational process of the department «Artistic Modeling, Design and Technology of Leather products», Kosygin Russian State University (Technologies. Design. Art) in the form of a textbook. In general, the direction of stylization of the stage image into everyday fashion is relevant, since the majority of respondents directly relate themselves to the culture of dance of one direction or another. The results obtained by the online survey method can be recommended to fashion designers and designers when developing new collections of shoes and accessories.
Post-COVID-19 syndrome among hospitalized COVID-19 patients: a cohort study assessing patients 6 and 12 months after hospital discharge
Authors: Rocha Roseany Patricia Silva , Andrade Amanda Cristina de Souza , Melanda Francine Nesello , Muraro Ana Paula
Published: February 2024

Post-COVID-19 syndrome involves a variety of symptoms that last more than 12 weeks after COVID diagnosis. This study aimed to analyze post-COVID-19 syndrome among hospitalized COVID-19 patients 6 and 12 months after hospital discharge. This is an ambidirectional cohort study conducted with individuals who were discharged from three main hospitals in the capital of Mato Grosso State, Brazil, between October and December 2021 and January and March 2022. After data collection from medical records, the individuals were interviewed by telephone 6 and 12 months after hospital discharge, when they were asked about the presence of ongoing or new symptoms and when symptom frequency was evaluated according to sociodemographic and economic characteristics hospitalization, and health conditions. Of all 277 medical records evaluated, 259 patients were eligible to participate in the study, 190 patients six months after discharge and 160 patients 12 months after hospital discharge. At six months, 59% were female patients, 40% were aged 60 years or older, and 87.4% reported at least one symptom. At 12 months, 58.7% were female patients, 37.5% were aged 30 to 49 years, and 67.5% reported at least one symptom. Fatigue was the most common symptom 6 and 12 months after hospital discharge (55.3% and 40.6%, respectively), followed by memory problems (36.8%; 20%), and hair loss (26.8%; 11.2%). The prevalence of post-COVID-19 syndrome was higher among patients of older age, lower income, with hypertension, diabetes, and more severe infection during hospitalization. The risk factors for post-COVID-19 syndrome help understand the long-term effects and the importance of monitoring after the acute phase of the disease.
Prevalence, trends, and factors associated with hypertensive crisis among Peruvian adults
Authors: Calderon-Ocon Victor , Cueva-Peredo Fiorella , Bernabe-Ortiz Antonio
Published: February 2024

There are few studies focused on the epidemiology of hypertensive crisis at the population level in resource-constrained settings. This study aimed to determine the prevalence and trends over time of hypertensive crisis, as well as the factors associated with this condition among adults. A secondary data analysis was carried out using the Peruvian Demographic and Family Health Survey (ENDES). Hypertensive crisis was defined based on the presence of systolic (≥ 180mmHg) or diastolic (≥ 110mmHg) blood pressure, regardless of previous diagnosis or medication use. The factors associated with our outcome were evaluated using multinomial logistic regression, and the trend of hypertensive crisis was evaluated using the Cochrane-Armitage test. Data from 260,167 participants were analyzed, with a mean age of 44.2 (SD: 16.9) years and 55.5% were women. Hypertension prevalence was 23% (95%CI: 22.7-23.4) and, among them, 5.7% (95%CI: 5.4-5.9) had hypertensive crisis, with an overall prevalence of 1.5% (95%CI: 1.4-1.6). From 2014 to 2022, a significant decrease in the prevalence of hypertensive crisis was observed, from 1.7% in 2014 to 1.4% in 2022 (p = 0.001). In the multivariable model, males, increasing age, living in urban areas, high body mass index, and self-reported type 2 diabetes were positively associated with hypertensive crisis, whereas higher educational level, socioeconomic status, and high altitude were inversely associated. There is a need to improve strategies for the diagnosis, treatment, and control of hypertension, especially hypertensive crisis.
Fishes from affluents of Rio Branco, Municipality of Caracaraí, Roraima State, northern Brazil
Authors: Lopez Giovanna Guimarães Silva , Cetra Mauricio , Mattox George Mendes Taliaferro
Published: February 2024

Abstract The Amazon has the richest freshwater ichthyofauna of the planet, with tens of new species being described annually. Although studies on Amazonian fish in the literature are increasingly common recently, there are still significant gaps concerning primary data on the ichthyofauna. One such gap is the state of Roraima and its main drainage, Rio Branco. There is a single book published in 2007 on fishes of Rio Branco, and although it presents a rather complete list of over 580 species known until then, the information is now a little outdated and many species found in some of its affluents are not listed in the book. Due to the scarcity of published data on the fish diversity of Roraima and taking into account that ichthyofaunal surveys are important tools towards freshwater conservation, we carried out an inventory of the ichthyofauna in the region of Caracaraí (RR) in 18 sampling sites including seven affluents of both left and right margins of Rio Branco. We recorded a total of 64 species of 41 genera and 18 families of five orders that occur in the Neotropical region, representing more than 11% of the species previously registered in the book for the entire Rio Branco basin. Twelve species were added to the list presented in the book, with four representing first records for the basin, one of them a new record for Brazil. Two of the 64 species are putative new taxa in need of further taxonomic studies. The order with the highest diversity was Characiformes (40 species), with highlights for the family Characidae (24 of these species), followed by Cichliformes (11 species) and Siluriformes (9 species). The richest collecting sites had 23 species, and the least rich site had only two species. Hyphessobrycon bentosi and Nannostomus marginatus occurred in more than 60% of the sites. There has been a significant difference in the exclusive ichthyofauna from affluents of both margins of Rio Branco, with the number of exclusive species in left margin tributaries approximately five times higher. Results presented herein complement data from the literature regarding the still poorly known ichthyofauna from Roraima.
Gerenciamento de discursos hídricos: A comunicação da crise de abastecimento de água na RMSP (2014-2015)
Authors: Leite Douglas de Albuquerque , Monteiro Marko Synésio Alves
Published: February 2024

Resumo Este artigo investiga a forma como foi discursada a crise de abastecimento hídrico registrada na Região Metropolitana de São Paulo (RMSP), durante o biênio 2014-2015. São enfocados aspectos de monopólio de informações e mobilização da expertise científica pela Companhia de Saneamento Básico do Estado de São Paulo e pelo Governo do Estado de São Paulo, e da instrumentação desses aspectos na comunicação massiva dedicada ao episódio. Amparados nos Estudos Sociais de Ciência e Tecnologia e na teoria do enquadramento (framing), foram analisados 63 documentos publicados por esses atores. Os resultados apontam para um plano discursivo que buscou moldar a interpretação da crise, relativizando a condição dos agentes públicos e revigorando determinado modelo de expansão da rede de abastecimento hídrico. A contribuição dessa investigação é a identificação do discurso público como instrumento de ação sobre a infraestrutura urbana de saneamento básico.
Discursos sobre o manejo florestal sustentável no Domínio da Caatinga
Authors: Lucena Marcelo Silva de , Zakia Maria José Brito , Guerin Natalia
Published: February 2024

Resumo O manejo florestal sustentável (MFS) pode abrigar diferentes discursos sobre a sustentabilidade. Neste trabalho, a partir da teoria do discurso, foram caracterizadas as principais ideias, conceitos e narrativas que têm sido propostos sobre o MFS da vegetação nativa do Domínio da Caatinga (DC). Foram constatados três principais discursos: a) MFS bioenergético: enfatiza a produção de biomassa florestal para abastecer as demandas energéticas regionais; adicionalmente, procura contribuir fortemente para a redução do desmatamento e conservação florestal; b) MFS silvo-pastoril: busca fornecer alternativas para melhorar a disponibilidade forrageira; c) MFS não madeireiro: procura valorizar os conhecimentos tradicionais sobre a biodiversidade, para ampliar as formas de manejo de múltiplas espécies e fortalecer as estratégias de convivência com a região semiárida. A existência de diferentes discursos, juntamente com o leque de práticas sustentáveis que eles apresentam, oferece a oportunidade para a mudança política e inovação institucional.
Discourses on sustainable forest management in the Caatinga Domain
Authors: Lucena Marcelo Silva de , Zakia Maria José Brito , Guerin Natalia
Published: February 2024

Abstract Sustainable forest management (SFM) can harbor different discourses on sustainability. In this paper, based on discourse theory, the main ideas, concepts and narratives that have been proposed about the SFM of the native vegetation of the Caatinga Domain (DC) were characterized. Three main speeches were highlighted: a) Bioenergetic SFM: emphasizes the production of forest biomass to supply regional energy demands; additionally, it seeks to contribute strongly to the reduction of deforestation and forest conservation; b) Silvopastoral SFM: seeks to offer alternatives to improve forage availability; c) Non-timber SFM: seeks to value traditional knowledge about biodiversity, to expand the ways of managing multiple species and strengthen strategies for coexistence with the semi-arid region. The existence of different discourses, together with the range of sustainable practices they present, offers the opportunity for policy change and institutional innovation.
Impactos dos Desastres Socioambientais no Oeste do Paraná entre 2010 e 2020
Authors: Gonzalez Aline Costa , Carniatto Irene , Pereira Vilmar Alves
Published: February 2024

Resumo Os objetivos dessa pesquisa são analisar: a) os registros de desastres no sistema da Defesa Civil SISDC/PR; b) o número de pessoas afetadas e inventário dos danos financeiros, no período de 2010 a 2020, em três dos principais municípios da mesorregião oeste paranaense. A pesquisa foi realizada por meio do levantamento de dados e estudo documental, que identificaram 20 tipos diferentes de desastres, entre naturais e tecnológicos. Desses, os mais frequentes foram vendaval, alagamentos e granizo. Os prejuízos econômicos foram da ordem de R$ 372.046.631,73 e, concomitantemente, 1.359.599 pessoas sofreram com os impactos desses desastres. A partir desses registros podem-se apontar ações de gestão de riscos e de desastres para aumentar a capacidade de adaptação dos referidos municípios às mudanças climáticas e consequente redução dos riscos e dos desastres.