bluuebunny/crossref_metadata_2025 huggingface dataset:
ON MODELING THE FLOW OF RUBBER MIXTURES IN THE CHANNELS OF THE COEXTRUSION HEAD WITH A REINFORCED CONTACT ZONE OF MATERIALS
Authors:   Yaroslavl state technical university, Dolgin Dmitry S. , Vatagin Alexander A. ,   Yaroslavl state technical university, Gudanov Ilya S. ,   Yaroslavl state technical university, Lebedev Anton E. ,   Yaroslavl state technical university
Published: February 2024

Currently, in the chemical and related industries, the process of obtaining polymeric, two-layer products with a reinforced contact zone of materials is common. These products include: caterpillar tracks, liners for tram tracks, etc. Particular attention is paid to the quality of products obtained by coextrusion. The article presents ways to solve problems of obtaining a strong connection between the layers of materials and an unstable shape of the extrudate at the outlet of the co-extrusion head. The authors propose to use a co-extrusion head with a reinforced material contact zone. In order to save time and computing resources, it is necessary to identify a rational design zone, in which sufficient calculation accuracy will be ensured. To identify the rational design zone, numerical experiments were carried out in the ANSYS software and computer system. The Maxwell model was chosen as the rheological model. Velocity and pressure distribution patterns were obtained, which can be used to solve various applied problems. It was revealed that the maximum speed is achieved in the center of the head section, while its minimum values are located along the periphery. As a result, dependences of the velocity inhomogeneity coefficient in the outlet section on the relative tooth height were drawn. The resulting regression curves are similar for the cases of the full and partial simulation zones. That is why it is sufficient to simulate the process only in the part of the extrusion head. With such a scheme, the number of finite elements will be less, which, with a given accuracy, will reduce the calculation time. The results obtained can be used in the design of co-extrusion heads for tire and rubber industries in order to replace foreign equipment with domestic developments.
DEVELOPMENT OF A SIMULATION MODEL OF THE AUTOMATIC CONTROL SYSTEM FOR THE GREEN LIQUOR LEVEL IN THE MELT DISSOLVER TANK OF A RECOVERY BOILER UNIT
Authors:   St. Petersburg state university of industrial technologies and Design, Kovalev Dmitrii A. , Sharyakov Vladimir A. ,   St. Petersburg state university of industrial technologies and Design, Sharyakova Olga L. ,   St. Petersburg state university of industrial technologies and Design, Rubtsova Maria A. ,   St. Petersburg state university of industrial technologies and Design
Published: February 2024

The use of existing or development of new simulation models of the green liquor recovery process in the recovery boiler (RB) remains relevant due to the ever-increasing requirements for process safety and product quality, therefore a general algorithm for simulation of the automatic control system of the green liquor level in the dissolver tank of the RB is proposed. Application of the developed analytical model in practice will allow users to increase the accuracy of green liquor level control in the dissolver tank and reduce the influence of disturbing actions on the quality of the technological process
3D bioprinting of anisotropic filler-reinforced polymer nanocomposites: Synthesis, assembly, and multifunctional applications
Authors: Wu Yuan , Ganguly Sayan , Tang Xiaowu Shirley
Published: February 2024

Bioprinting is a novel technique with a wide range of potential uses, including the fabrication of functioning tissue constructs for use in the biomedical sectors. It is a revolutionary method for high-throughput manufacturing that automates fine control over manufactured structures. Bioink refers to the solution of biomaterials usually encapsulating cells used in the bioprinting process; this bioink often encapsulates the appropriate cell types. In order to create the ultimate architecture, this bioink should solidify during or shortly after bioprinting. Bioinks can be developed from either all-natural or all-synthetic biomaterials, or a blend of the two. Cell aggregation can occasionally be used as a bioink without addition of any biomaterials, in bioprinting process. To bioprint functional tissues and organs, an optimal bioink should possess mechanical, rheological, and biological characteristics mimicking those of the target tissues. For attaining physicomechanical properties, anisotropic fillers are commonly added in bioink formulations. In this review, we provide an in-depth discussion of various anisotropic fillers used in bioprinting and their fabrication techniques, and outline their multifunctional applicability in biomedical and environmental areas. Given the steady growth of bioprinting market, we also present the global scenario of the bioprinting market and their techno-commercial orientations.
Optimizing cell deposition for inkjet-based bioprinting
Authors: Ng Wei Long , Shkolnikov Viktor
Published: February 2024

Although inkjet-based bioprinting enables precise drop-on-demand cell deposition within three-dimensional (3D) tissue constructs and facilitates critical cell–cell and cell–matrix interactions, it faces challenges such as poor cell homogeneity and low cell viability. To date, there is a lack of comprehensive review papers addressing the optimization of cell deposition in inkjet-based bioprinting. This review aims to fill that gap by providing an overview of various critical aspects in bioprinting, ranging from bio-ink properties to the impact of printed droplets. The bio-ink section begins by exploring how cells influence the physical properties of bio-inks and emphasizes the significance of achieving cell homogeneity within bio-inks to ensure consistent and reliable printing. The discussion then delves into inkjet-based printing chambers (thermal and piezoelectric), the effect of shear stress on printed cells, droplet formation dynamics, the influence of polymer-based and cell-laden droplets on the underlying substrate surface, and the dynamics of droplet impact. Beyond droplet formation and impact, the review highlights the importance of biophysical and biological cues within 3D hydrogel matrices for cell proliferation and differentiation. Finally, the paper highlights current and potential applications, with a specific focus on skin and lung tissue engineering using inkjet-based bioprinting techniques, and provides insights into the emerging role of machine learning in optimizing the cell deposition process for inkjet-based bioprinting.
Educação Matemática Queer: uma possibilidade dialética entre bases numéricas e concepções de gêneros
Authors: Lacerda Matheus Centa de , Rosa Maurício
Published: February 2024

Este artigo investiga uma possível relação entre a educação matemática e concepções de gêneros, por meio de atividades envolvendo bases numéricas. Assim, a prática pedagógica que foi colocada em ação com estudantes de um 9º ano do ensino fundamental, visou, sob um viés queer, conscientizar sobre as identidades de gêneros (no plural) e sustentar, por meio da matemática, a luta da comunidade LGBTQIA+[1] em termos de resistência e equidade. Nossos resultados apontam para uma promoção, por parte das/des/dos estudantes, da conscientização sobre a dialética existente entre a diversidade de gêneros e as representações de bases numéricas. Logo, a pesquisa qualitativa desenvolvida indica que as identidades de gêneros, assim como, as sexualidades (ditas como assuntos provenientes das ciências humanas) e as possibilidades de constituir conhecimento matemático com as atividades sobre bases numéricas desenvolvidas estão dialeticamente ancoradas.
 
[1] “[...] L = Lésbicas - São mulheres que sentem atração afetiva/sexual pelo mesmo gênero, ou seja, outras        mulheres. G= Gays - São homens que sentem atração afetiva/sexual pelo mesmo gênero, ou seja, outros homens. B = Bissexuais - Diz respeito aos homens e mulheres que sentem atração afetivo/sexual pelos gêneros masculino e feminino. T =Transexuais - A transexualidade não se relaciona com a orientação sexual, mas se refere à identidade de gênero. Dessa forma, corresponde às pessoas que não se identificam com o gênero atribuído em seu nascimento. As travestis também são incluídas neste grupo. Porém, apesar de se identificarem com a identidade feminina constituem um terceiro gênero. Q = Queer-Pessoas com o gênero 'Queer' são aquelas que transitam entre as noções de gênero, como é o caso das drag queens. A teoria queer defende que a orientação sexual e identidade de gênero não são resultado da funcionalidade biológica, mas de uma construção social. I = Intersexo - A pessoa intersexo está entre o feminino e o masculino. As suas combinações biológicas e desenvolvimento corporal - cromossomos, genitais, hormônios etc. - não se enquadram na norma binária (masculino ou feminino). Assexuais- Assexuais não sentem atração sexual por outras pessoas, independente do gênero. Existem diferentes níveis de assexualidade e é comum que estas pessoas não veem as relações sexuais humanas como prioridade. +, O + é utilizado para incluir outros grupos e variações de sexualidade e gênero. Aqui, são incluídos os pansexuais, por exemplo, que sentem atração por outras pessoas, independente do gênero” (SILVA,2020).
Effect of Alteration in Hip Joint Alignment following Total Hip Arthroplasty on Hip Joint Contact Force during Gait
Authors: Hata Kazutaka , Ishido Yasuhiro , Fukudome Kiyohiro , Kiyama Ryoji , Kawada Masayuki , Nishi Tomohiro , Nakatsuji Shintaro , Yone Kazunori
Published: February 2024

Purpose

Investigation of the relationship between changes in hip-joint center and hip loading pre- and post- total hip arthroplasty (THA) is important in evaluating the effect of surgery on motor function. However, few longitudinal studies comparing pre- and post-THA have been reported. The purpose of this study was to determine the effect of changes in hip-joint center pre- and post-THA on the magnitude and direction of hip-joint contact force during the gait cycle, using a patient-specific musculoskeletal model.

Methods

The simulation program AnyBody was used to create musculoskeletal models incorporating patient specific hip-joint shape and hip-joint center position for 17 patients. The relationship between the displacement distance of the hip-joint center and the amount of change in hip-joint contact force was examined by correlation analysis.

Results

A decrease in the medial force (p ≤ 0.049) and an increase in the anterior force (p ≤ 0.001) acting on the hip joint were observed during gait post-THA compared to pre-THA. Mediolateral displacement of the hip-joint center post-THA compared to pre-THA was significantly positively correlated with the difference in anterior hip-joint contact force, and negatively to hip-joint medial contact force.

Conclusions

Longitudinal observations revealed the effects of change in hip-joint center position induced by THA on the hip-joint contact force during gait. Therefore, the change of hip-joint center position during THA can be an important factor for estimating the improvement of motor function following THA.
Effectiveness of Serial Casting Alone and in Combination with Botulinum Neurotoxin in Pediatric Spastic Cerebral Palsy Patients
Authors: Argunsah_ Hande , Bentley Katherine , Androwis Ghaith , Higgins Laura , Nolan Karen J.
Published: February 2024

Purpose

This study evaluated the changes in gait of pediatric cerebral palsy patients after serial casting alone and serial casting in conjunction with botulinum neurotoxin treatments.

Methods

Retrospective data of 31 children were investigated. Sixteen children were treated with serial casting combined with BoNT injection and 15 children were treated only with serial casting treatment. GAITRite was used to collect velocity, cadence, swing %, stance %, step length, stride length, and step time parameters to compare the outcomes of the treatments.

Results

Combined treatment group unaffected side swing % showed a statistically significant difference at completion (M = 35.16 ±1.21; M = 32.46 ± 1.38; t (15) = 2.12, p = 0.049). Unaffected side stance % at pre-intervention was statistically different for serial casting only and the combined treatment groups (M = 61.69± 0.73; M = 64.88±1.20; t (14) = -2.273, p = 0.039). Pre- and post-intervention hemiplegic side swing % comparison was statistically significant for the serial casting only group (M = 40.87± 0.57; M = 42.39±0.79, t (14) = -0.151, p = 0.032). The baseline velocity of the combined treatment group was slower than the serial casting-only group (88±11.2 vs. 107±14.4 (cm/s), p=0.007).

Conclusions

This investigation suggests that for patients, who have poor ambulation quality, abnormal spatiotemporal gait parameters, and significant spasticity at pre-intervention, BoNT in conjunction with serial casting is more effective for improving ambulation quality. Serial casting can be used in conjunction with botulinum neurotoxin, which is efficient in muscle morphology and function regulation by reducing spasticity.
Evaluation of mandibular geometry in healthy children aged 0-1 year – a pilot study
Authors: Lipowicz Anna , Kawlewska Edyta , Larysz Dawid , Kostyra Patrycja , Graja Katarzyna , Joszko Kamil , Gzik-Zroska Bożena , Wolański Wojciech
Published: February 2024

Purpose

The main aim of the researches was the three-dimensional morphological assessment of the mandible in children.

Methods

The research group consisted of 34 infants from 21 to 417 days of age (0-13 months). Models of the mandibles were developed on the basis of tomographic images. Characteristic anatomical points were marked on the models, on the basis of which characteristic distances and angles were calculated, determining the length, width and height of the mandible as well as its proportion and symmetry. Based on the obtained database, models of mandibular growth in the first year of life in three directions were also developed.

Results

It was performed the statistical analysis to assess the jaw dimensions in children in the first year of life. The size, shape and proportions of the lower jaws were obtained and analyzed.

Conclusions

The analysis of the results revealed some significant objective information on the growth and development of the normal mandible.
Biomechanical characterization of bilateral pedicle screw internal fixation combinations on lumbar vertebrae
Authors: Weiqi Li  , Peiming Zhang  , Feihong Gan
Published: February 2024

Purpose

Pedicle screw fixation has been considered a suitable surgical intervention for addressing a diverse range of indications involving the lumbar spinal segments, but the impact of bilateral pedicle screw internal fixation combinations on the stability and flexibility of vertebral body motion has been limited. This study aimed to the effect of pedicle screw internal fixation on the mechanical characterization of lumbar multi-segmental vertebra under various loading conditions.

Methods

Porcine lumbar multi-segmental vertebral samples were tested with three pedicle screw fixation groups including rigid fixation, mixed fixation and dynamic fixation under four loading conditions of flexion, posterior extension, left-side bend, and right-side bend at bending moments of 3 N⋅m, 4 N⋅m, 5 N⋅m and 6 N⋅m, respectively. The stability and flexibility of the segmental motion were statistically analysed.

Results

The flexibility of joint activities increased using one-way dynamic pedicle screws with the range of motion for mixed fixation and dynamic fixation increased by 30% and 47% in left side bend and by 25% and 73% in right side bend, respectively. The range of motion for lumbar vertebra increased with higher moments.

Conclusions

The flexibility of joint activities was improved using one-way dynamic pedicle screws and the mixed fixation was considered moderate providing larger flexibility in right and left side bend without compromising stabilization. The results of this study are useful for providing theoretical reference for clinical selection of surgical plans.
Comparison of the Fluoride Ion Release from nanofluoroapatite-modified orthodontic cement under different pH Conditions - an in vitro Study
Authors: Dobrzyński Wojciech , Nikodem Anna , Diakowska Dorota , Wiglusz Rafał J. , Watras Adam , Dobrzyński Maciej , Mikulewicz Marcin
Published: February 2024

Purpose

Construction of the orthodontic bracket promotes food accumulation, which is the cause of plaque formation. Modern trends in the design of adhesive orthodontic cements focus on the ability to release cariostatic fluoride ions. One of the methods is to incorporate the material with fluorapatite nanoparticles. The aim of the study was to determine the fluoride release capacity of orthodontic cement doped with nanosized fluorapatite in selected media and solution pH over a 12-week period.

Methods

A commercial light-curing two-component orthodontic cement GC Fuji Ortho®LC was modified by the addition of nanofluorapatite at 2% or 5% by weight. Each of the three groups (5 samples in 9 different media of varying ionic composition and pH). Fluoride determination was performed at 18 time intervals.

Results

The largest amount of fluoride is released in the first hour of incubation of all samples. Incorporating cement with 5% w/w nFAp significantly increases the amount of ions released. Low pH and artificial saliva rich in calcium cations promote significantly lower fluoride detection, which is associated with the formation of CaF2 conglomerates. The erosion of the surface layer was confirmed by the SEM image to be responsible for the ability to release the largest amounts of fluoride ions in an acidic environment.

Conclusions

The selection of experimental media for studying the fluoride release capacity of biomaterials is important in terms of the results achieved. The nanofluorapatite content correlates with the amount of fluorine released. Some limitations of the current research require further studies.
Fabrication of Monophasic Strontium Doped Calcium Silicate Granules With Enhanced Osteogenic Performance In The Reconstruction Of Rabbit Bone Defect
Authors: Ghamor-Amegavi Edem Prince , Fei Xu  , Yu Chong
Published: February 2024

Purpose

Advances in the design and manufacturing of novel synthetic bioactive scaffolds as bone substitute in bone reconstruction are at the forefront of orthopedic study due to their excellent biological performances. However, fabricating bioactive scaffolds with similar osteogenic and mechanical properties of a natural bone still remains a challenge. Our aim was to produce functional bioactive scaffolds with biologically interactive ions, microstructure for cell proliferation and a suitable biodegradation rate in critical-size bone defect.

Methods

The Sr-CaSi group had complete bone healing and reconstruction. The granule showed physiochemical tolerance and was able to biodegrade enhancing the formation of new bone matrix and remodeling. However, the blank group had limited proliferation and osteogenic differentiation of new bone tissue, hence there was retarded ingrowth of new bone tissues.

Results

The Sr-CaSi group had complete bone healing and reconstruction. The granule showed physiochemical tolerance and was able to biodegrade enhancing the formation of new bone matrix and remodeling. However, the blank group had limited proliferation and osteogenic differentiation of new bone tissue, hence there was retarded ingrowth of new bone tissues.

Conclusions

The Sr-CaSi group saw excellent bone mineralization due to biostimulation effect of the bioceramic granules. The extensive stimulation and osteogenic factors in bone healing by the novel Sr-CaSi shows it is indispensable in bone tissue engineering and regenerative medicine.
Biomechanical properties of bicortical and monocortical plate fixation for rib fractures in the adolescent human rib fracture model
Authors: Głowacki Jakub , Bartkowiak Tomasz , Paczos Piotr , Zieliński Michał , Smyczyński Mikołaj , Pelic Marcin
Published: February 2024

Purpose

The technical advancement of surgical stabilization of ribs often prevents the surgeons from fixation, despite the procedure`s documented improved outcomes. The aim of this study was to evaluate a less invasive approach involving a simplified monocortical rib fixation technique.

Methods

Eighteen frozen human ribs obtained intraoperatively from young individuals aged 13-18 were employed for this study. First, the ribs were fractured under three-point bending, with their intrathoracic side put under tensile stress. Following this, the ChM 4.0 rib fixation system was utilized. The specimens were categorized into two groups: bicortical fixation (n=9), monocortical fixation (n=9). Subsequently, bicortical and monocortical fixation groups underwent dynamic testing over 400,000 cycles under combined sinusoidal tensile bending and torsional loading (2 N-5 N at 3Hz). In the final stage, all samples were subjected to a destructive load to failure.

Results

Our analysis revealed that the fixation method did not demonstrate statistically significant differences in terms of preliminary bending stiffness (p=0.379). Similarly, undergoing a course of 400,000 cycles involving combined tensile and torsional loading did not constitute a statistically significant factor affecting the monocortical and the bicortical fixation groups (p=0.894). In the monocortical fixation group, all specimens failed due to screws pulled out from the bone. In contrast, all specimens in the bicortical fixation group exhibited failure attributed to fractures occurring just behind the plate. Nonetheless, the fixation method was not a significant factor affecting bending strength (p=0.863).

Conclusions

The monocortial fixation could be a reasonable option among younger populations with comparable stability of fixation.
Security and Privacy of Wearable Wireless Sensors in Healthcare: A Systematic Review
Authors: Kaur Ranjit , Shahrestani Seyed , Ruan Chun
Published: February 2024

Wearable Wireless Sensor Network (WWSN) devices are widely used in healthcare to monitor health data. However, when WWSN users transmit their data to healthcare professionals or third parties over wireless connections, they face privacy and security vulnerabilities. This paper aims to identify the unsolved privacy and security challenges in wearable sensor devices in healthcare, especially the aspects overlooked by previous research. The main research question is: What are the unsolved privacy and security challenges in wearable sensor devices in healthcare, and what are their implications for users and healthcare professionals? This systematic review employs specific keywords to search for relevant publications on bibliographic databases, including Google Scholar, Scopus, IEEE Xplore, and Web of Science. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) charts helped in screening and summarising the selected papers. The results highlight the critical areas that can make WWSNs vulnerable to security attacks. The findings examine the security and privacy issues of wearable sensor devices in cloud computing, fog computing, the Internet of Things (IoT) and the like. Many studies examine IoT due to its privacy and security challenges, especially regarding handling extensive data, using public channels, deploying advanced technologies, managing sharing policies alongside the growing number of wireless devices, and protecting data from hackers. These challenges seriously threaten the confidentiality, integrity, and availability of health data transmitted by WWSN users to healthcare professionals or third parties in cloud-based environments and IoT and are exacerbated by limited resources. The significant findings thereby focus on unresolved areas in IoT. This paper aims to safeguard against cyber-attacks on healthcare and increase users' adoption rate of WWSN devices.
Challenges in Diagnosing and Managing Uterus Didelphys: A Case Report
Authors: Sebastian Giovanni  , Kang Heji Dian Pertiwi  , Rijal Syamsu
Published: February 2024

Background: This medical case report provides an insightful examination of a 22-year-old pregnant woman with uterus didelphys, a rare congenital anomaly of the Müllerian ducts. The introduction section sets the stage by discussing the embryological origins of congenital uterine anomalies and their varied clinical manifestations. It emphasizes the challenges in detecting these conditions due to their often asymptomatic nature and highlights their significant impact on reproductive health, including increased risks of miscarriage, preterm labor, and perinatal mortality.

Case presentation: The case report segment details the patient’s clinical presentation, initially misdiagnosed as an ectopic pregnancy, later revealed to be an intrauterine pregnancy coexisting with uterus didelphys. The diagnosis was substantiated by her history of irregular menstruation, lower abdominal pain since menarche, and a previously diagnosed ovarian cyst, illustrating the critical role of a thorough medical history in guiding diagnosis. The discussion section delves into the implications of uterus didelphys on fertility and pregnancy outcomes, advocating for individualized management strategies and highlighting the psychological impact of such congenital anomalies. It underscores the necessity of a multidisciplinary approach to care involving obstetricians, radiologists, and reproductive specialists.

Conclusion: The conclusion emphasizes the importance of clinical awareness, meticulous history-taking, and personalized care in the management of uterus didelphys. It calls for further research to enhance understanding and improve outcomes in reproductive medicine, stressing the complexity of diagnosing and managing pregnancies in women with Müllerian anomalies and the need to consider congenital uterine anomalies in differential diagnoses, particularly in young women with atypical gynecological histories.
The Effect of Chlorogenic Acid in Green Arabica Coffee Beans on the Activity of Staphylococcus aureus
Authors: Adriana Shirley , Molek  , Lola Marta Elisabet Pasaribu
Published: February 2024

Background: Gingivitis is a dental and oral health problem caused by the bacteria Staphylococcus aureus. This research utilized the antibacterial effect of the chlorogenic acid compound content of green Arabica coffee beans (Coffea arabica L.) on the activity of the Staphylococcus aureus bacteria. The aim of the research was to determine the effect of chlorogenic acid from green Arabica coffee beans and its inhibitory diameter on the activity of Staphylococcus aureus bacteria.

Methods: The research method used was laboratory experimental with post-test only with a control group design. The research samples were green Arabica coffee bean extract with various concentrations of 25%, 50%, 75%, and 100%, which is compared to various concentrations of pure chlorogenic acid (95% Sigma-Aldrich). The chlorogenic acid content in the extract was analyzed with liquid chromatography LC-MS/MS. The large sample was determined using the Federer formula with a total sample size of 24 samples. The parameter measured was the diameter of the growth inhibition zone for Staphylococcus aureus bacteria. Data were analyzed statistically using One-way ANOVA and Post Hoc LSD, and the research results were shown in regression graphs.

Results: The results of the analysis of chlorogenic acid content of green arabica coffee bean extract amounted to 4.29% The results of this study showed that the average diameter of the inhibition zone of green Arabica coffee bean extract with concentrations of 25%, 50%, 75% and 100% on the growth of Staphylococcus aureus bacteria was 7.65 ± 0.289 mm; 9.63 ± 0.550 mm, 10.50 ± 0.374 mm, and 12.75 ± 0.370 mm. Research shows that the higher the concentration of green Arabica coffee bean extract, the larger the diameter of the inhibition zone. 95% pure chlorogenic acid from Sigma-Aldrich displays an inhibition zone above 12.5%.

Conclusion: Chlorogenic acid exerts a substantial inhibitory impact on the proliferation of Staphylococcus aureus bacteria.
The Influence of Health Education Towards Buzz Group Method On Pregnant Women Knowledge About COVID-19 Pandemic at the Jember
Authors: Septiyono Eka Afdi
Published: February 2024

Background: Coronavirus disease (COVID-19) is an infected disease which caused by Sars-Cov-2 and it also called with pneumonia virus this disease are spreads quickly in the worldwide. Pregnant women are being a vulnerable group for this disease. They have a lack of immune system that impacts a physiological systems. Buzz Group is one of the effective method for increasing knowledge. Objective: The aim of this study is analyzed the effect of health education with Buzz Group method to increase the pregnant woman knowledge about COVID-19 pandemic in the work area of Panti Public Health Center. Methods: This study used Quasy-experimental method with pre-post test and used a control group design. The research sample technique used purposive sampling, consist of 20 pregnant women in the intervention group and 20 pregnant women in the control group. Results: This study analyzed with Wilcoxon's test, the result showed that there is a significant effects of health education with buzz group method on pregnant women knowledge about the COVID-19 pandemic (p value = 0.0001). The study analyzed with Mann Whitney's test, the results showed that there is a significant difference in the effects of buzz group method on intervention and control group (p value = 0.042).

Conclusion: Based on these, the buzz group method can be used as one of the granting health education to increasing knowledge.
ISOLATION AND EXAMINATION OF NAIL FUNGUS (ONYCHOMYCOSIS) IN THE NAILS OF FIELD FARMERS
Authors: Paramata Nanang Roswita
Published: February 2024

Onychomycosis is a superficial fungal infection, this fungus is found all over the world without exception in Gorontalo Province. The purpose of this research is to determine the type of fungus that causes onychomycosis. This research is a type of quantitative research with experimental methods using KOH (Potassium Hydroxide) and observing microscopically. The research population is farmers who work in the fields with a sample of 10 respondents using a total sampling technique and the data used is univariate data. The results found from 10 respondents, 5 respondents (50%) the results were positive and 5 respondents (50%) the results were negative. The fungi that cause onychomycosis are Tricophyton mentagrophytes and Epidermophyton floccosum. With this research, it is hoped that the type of fungus that causes infection in the nails can be identified. Also can be a reference for further research and information for the advancement of science and technology.

Key Word : Onikomikosis, KOH
DSFC Education on Knowledge And Attitude To Prevent Diabetic Foot Ulcer
Authors: Jamaluddin Ahmad , Wahdaniah Wahdaniah
Published: February 2024

Background: Diabetes Mellitus (DM) is a metabolic disease characterized by hyperglycemia. As the number of DM increases, the incidence of diabetic ulcers will also increase. Approximately 14-24% of diabetic foot ulcer patients require amputation with 50% recurrence after three years. This may be due to a lack of knowledge and information in carrying out foot care independently. Most DM patients still think that all they need to do is control their blood glucose levels, so they pay less attention to the condition or cleanliness of their feet, don't wear sandals, and don't cut their nails properly, which creates a risk of recurring wounds. The research aims to determine the effect of providing Diabetic Self Foot Care (DSFC) health education on patient knowledge and attitudes about preventing diabetic foot ulcers.

Method: This research was a descriptive-analytical design with a pretest–posttest cross-sectional study approach. Sampling in this research used a total sampling technique, obtaining a sample of 15 respondents. Data collection used measuring instruments in the form of questionnaires, data analysis uses the non-parametric statistical test Wilcoxon Sign Test.

Results: The results of respondents' measurements after being given education about preventing diabetic foot ulcers showed that 15 of the respondents had a positive attitude after being given the education. The results of the analysis through statistical tests were obtained by Asymp.Sig. (2-tailed) 0.001 which means it is smaller than the p-value 0.05, so the result is
Feasibility of coronary flow velocity reserve during semi-supine exercise echocardiography: a single center study of 3,014 patients
Authors: Zagatina Angela , Hanjykova Ogulleyla , Petrova Ekaterina , Begidova Irina , Kalinina Elena
Published: February 2024

Aim: There is a lack of studies that analyzed factors influencing on feasibility of coronary flow velocity reserve (CFVR) during exercise stress echocardiography (SE). The aim of the study was to define the feasibility of assessment of CFVR during exercise through SE depending on experience, techniques, and clinical factors.
Methods: This is a single-center study. SE was performed using three generations of echo systems in five consecutive cohorts of patients by experienced and novice specialists. All patients performed a supine bicycle testing. CFVR was calculated in the middle/middle-distal parts of the left anterior descending artery (LAD). Three different adjustment settings were used for LAD visualization.
Results: The study included 3,014 patients (59 years old ± 11 years old, 54% males). Age [odds ratio (OR) 0.98, 95% confidence interval (CI) 0.96–0.99, P < 0.01], body mass index (BMI; OR 0.95, 95% CI 0.91–0.98, P < 0.003), rest heart rate (OR 0.98, 95% CI 0.97–0.99, P < 0.0005) and doctor’s experience (OR 2.7, 95% CI 1.57–4.53, P < 0.0003) were independent factors that influence on feasibility. The feasibility of CFVR assessment during exercise SE in the whole population by experienced doctors was 89.4%. The feasibility of CFVR assessment of LAD in obese patients performed by experienced doctors using modern echo machines and new techniques was high (86.0%).
Conclusions: Coronary artery velocity reserve during supine exercise SE is a feasible, non-invasive available tool. The new generation echo machine and the new techniques provide a good feasibility of CFVR assessment, even in novice doctors. Despite a lower level of possibility to assess CFVR in obese patients or with a higher resting heart rate, this method is feasible in a great majority of such patients.
Generation and pathogenicity of autoantibodies associated to thrombosis and hemostasis
Authors: Amiral Jean
Published: February 2024

Many acquired bleeding and thrombotic complications are provoked by autoantibodies to blood coagulation factors, or to hemostasis inhibitors and regulatory proteins. If occurrence of those antibodies remains rare or ultra-rare, affected patients are not always well-identified and associated pathologies are not always understood. Today, autoantigens tend to be better characterized. New available methods allow investigating structural changes of body components, responsible for auto-immunization. This renders it possible to develop laboratory assays for detecting autoantibodies and estimating their blood concentration. This review analyzes the major autoantibodies reported to be associated with hemorrhagic or thrombotic pathologies and their possible inducing causes when known. Pathogenicity is strongly patient- and context-dependent and is related to autoantibodies’ concentration, avidity, and capacity to bind to autoantigen structures in-vivo, misdirecting the immune system to the own body’s cells or organs. Identification of autoantigens allows for developing laboratory methods for testing autoantibodies and following their evolution kinetics. In-vitro investigations concern functional assays, to evaluate autoantibody’s capacity to inhibit physiological activities, or autoantigen-capture-based assays to detect autoantibodies, like with enzyme-linked immuno-sorbent assay (ELISA) methods. Exploring patients with autoimmune complications remains difficult as few specific assays are available. They mainly concern diseases with the highest incidence, like anti-phospholipid antibodies, lupus anticoagulants, or heparin-dependent antibodies. The present understanding suggests that antibodies to ubiquitous components, like phospholipids or polysaccharides, are actually targeted to proteins with a strong affinity binding to those components: Autoantibodies are not directed to phospholipids, but to phospholipid-binding proteins, and heparin-dependent antibodies are not directed to anticoagulant polysaccharides, but to platelet factor 4. Most pathogenic autoantibodies are of immunoglobulin G (IgG) isotype, but in some cases, IgM or IgA isotypes can be involved. Identification and characterization of autoantibodies associated to hemorrhagic or thrombotic pathologies remains complex at the laboratory level, although they are of high relevance for the right management of concerned patients.
Aplicación del modelo de Van Hiele al estudio de los conceptos de perímetro y área en una escuela rural con aulas multigrado
Authors: Bustamante-Valdés Matías , Caamaño Carlos , Lodhi Atif , Díaz-Levicoy Danilo
Published: February 2024

La investigación se centra en el análisis de los niveles de razonamiento geométrico y los grados de adquisición, de acuerdo con el modelo de Van Hiele, que obtienen los estudiantes de 5º y 6º de Educación Básica de una escuela rural con aulas multigrado, al implementar una unidad didáctica sobre perímetro y área de cuadriláteros. La metodología es mixta, con un diseño pre-experimental, con aplicación de pre-test y post-test. La muestra está constituida por 7 estudiantes en un curso multigrado. Para el análisis de los niveles de razonamiento, se tomaron en cuenta los tipos de respuesta de los estudiantes, los que son de utilidad para ponderar las respuestas y con ello lograr medir los grados de adquisición. Se describen resultados antes y después de la implementación que, aplicando la prueba no paramétrica Wilcoxon para muestras emparejadas, evidencian cambios positivos mostrando diferencias estadísticamente significativas, logrando alcanzar los niveles de razonamiento y grados de adquisición acordes a su nivel educacional.
Uma investigação histórica de um texto de Leonardo Pisano, edição de 1857, considerando as esferas de análise da Historiografia Atualizada
Authors: Guimarães Filho José dos Santos , Brandemberg João Cláudio
Published: February 2024

Nos últimos anos, temos pesquisado sobre objetos matemáticos presentes em textos históricos, o que nos levou a percorrer alguns caminhos na reconstrução histórica e epistemológica destes. Nesse percurso de investigação nos deparamos com uma ferramenta da Historiografia Atualizada alcunhada de esferas de análise, a qual é composta por três esferas: contextual, historiográfica e epistemológica, que ajustadas para análise de textos históricos, podem oferecer uma ferramenta exequível para o estudo de conteúdos matemáticos. Dessa forma, questionamos: Como a utilização das esferas de análise da Historiografia Atualizada podem contribuir para uma investigação de objetos matemáticos em textos históricos? E para responder este questionamento, objetivamos investigar as condições de contorno da aritmética contida no Liber Abaci a partir das esferas de análise da historiografia atualizada. Assim, construímos um suporte teórico e metodológico com os critérios da ciência histórica com percepções mais atualizadas e ajustadas a investigação de textos históricos, oportunizando a reconstrução das condições de contorno da aritmética do século XIII contidas no Liber Abaci de Leonardo Pisano (1180 – 1250). Utilizamos nesta investigação a edição de 1857, sendo possível restituir o texto ao seu contexto medieval a partir da ação conjunta das esferas de análise da historiografia atualizada.
Consideraciones sobre la relación entre el Arte figurativo y la Matemática
Authors: D’Amore Bruno , Fandiño Pinilla Martha Isabel
Published: February 2024

En este texto, proponemos varias consideraciones que, a nuestro juicio, proporcionan diversos vínculos, algunos de estos inesperados, entre la Matemática y el arte figurativo, con el fin de proporcionar material para la reflexión cultural general y sugerir hipótesis de trabajo en las clases de Matemática escolar.
La tutoría de los docentes de matemática de la Secundaria Básica. Una experiencia desde la introducción de resultados investigativos
Authors: Perón Migdalia Fernández , Murias Gilda Hernández , Aguilera Pablo Ernesto Estrada , González Olga Lidia Pérez
Published: February 2024

El trabajo aborda una experiencia pedagógica relacionada con una de las tareas del proyecto de investigación “Gestión didáctica innovadora para mejorar la formación de los estudiantes de Preuniversitario y Secundaria Básica”, de la universidad de Camagüey. En el mismo se destaca la necesidad, en el contexto de la escuela cubana actual, de la labor tutorial en instituciones educativas de la Secundaria Básica, seleccionadas del municipio Camagüey, en función de la formación didáctico-matemática de los docentes de matemática, a partir de la introducción de resultados científicos derivados de la investigación educativa. El presente trabajo persigue como objetivo caracterizar el desempeño de los investigadores, en su función de tutores, en el proceso de enseñanza- aprendizaje de la matemática, mediante los fundamentos teóricos y didácticos-metodológicos que inciden en la consolidación de modos de actuación profesional de los docentes del territorio. Para su desarrollo se emplearon métodos teóricos como el analítico-sintético y el deductivo-inductivo que posibilitaron realizar las valoraciones necesarias y establecer generalizaciones a partir de la información obtenida de los talleres desarrollados. Entre los empíricos se utilizó la observación durante el desarrollo de las actividades docentes, así como la aplicación de una encuesta de satisfacción para constatar su efectividad.
Socio-educational characteristics are associated with the choice of operation in additive questions and in multiplicative questions
Authors: Lopes Thiago Beirigo , Felix Ana Paula Nunes , Sá Pedro Franco de
Published: February 2024

The term socio-educational constitutes something that at the same time relates education and society, in which it extends to any dimensions that include these two aspects of the individual. Therefore, to guide the research conducted in this thesis cut, the following guiding research question was created: Do socio-educational factors interfere in the process of choosing the operation in additive or multiplicative issues? To answer this guiding question, the objective of the research was to analyze whether the student's socio-educational characteristics interfere in the choice of operation to solve additive and multiplicative questions. The instrument used to perform this analysis if there is a statistical association between the objects studied was the Chi-Square association test. The data obtained by the socio-educational questionnaire processed through the association test indicated that there was a statistical association between the choice of operation in questions and factors referring to the student's relationship with mathematics and its study.
A coordenação pedagógica e as intervenções no cotidiano escolar
Authors: Lima Paulo Gomes , Pereira Meira Chaves
Published: February 2024

En este artículo; cuyo objetivo es situar la coordinación pedagógica como una actividad intermedia, entre las atribuciones de apoyo al profesor; Destacamos la gestión pedagógica como la atribución de todo el equipo escolar, pero de respuesta directa de la dirección y coordinación pedagógica. La reflexión sobre una profesión o función particular en un campo del conocimiento exige la comprensión de los elementos constitutivos de un tiempo histórico y el contexto que requirió su creación en Brasil, sus fundamentos, documentos oficiales, delimitación de atribuciones a las expectativas del papel de este profesional. A través de una investigación exploratoria-reflexiva, se pretende enfatizar la centralidad profesional del coordinador pedagógico y la importancia de su papel en la actividad final de la escuela.
Valorização Docente e os Impactos na Saúde em Tempos de Pandemia
Authors: Cardoso Berta Leni Costa , Ribeiro Vanilda Batista
Published: February 2024

O objetivo deste estudo consiste em avaliar a valorização do trabalho docente e identificar os impactos na saúde dos docentes em meio a pandemia da covid-19. Trata-se de um estudo descritivo com abordagem quantitativa e qualitativa, realizado com 27 docentes da Universidade do Estado da Bahia (UNEB) – DEDC Campus XII – Guanambi (BA). Para a coleta de dados, utilizou-se o Questionário de Valorização Docente (QVD). Os dados foram analisados pelo programa SPSS, versão 21, e para as análises inferenciais foram consideradas o nível de significância p<0,05. Prevaleceram os docentes da área da Educação Física (40,7%), com idades que variam entre 33 e 60 anos, com renda mensal de mais de cinco salários mínimos (55,6%), em que 40,7% são doutores e 25,9% dos estão em processo de formação continuada. Predominam os professores efetivos/concursados (77,8%) e os demais contrato temporário. Revela-se que o incentivo salarial é baixo na formação continuada, e se sentem sobrecarregados, sendo que 29,6% se sentem emocionalmente cansados com o trabalho. No que concerne a remuneração, os docentes não estão satisfeitos com o salário, e para eles, esse é um dos principais fatores que caracterizam a desvalorização. Além disso, as condições de trabalho impactam significativamente na saúde dos mesmos, principalmente na pandemia, em que não são oferecidos aparatos tecnológicos e capacitação adequada, causando nos docentes problemas como ansiedade, estresse, insônia e outros. Conclui-se que a classe não se sente valorizada, os salários precisam ser ajustados, e há a necessidade da promoção de políticas públicas para a real valorização docente.
Enseñanza Online y Offline necesitan herramientas tecnológicas
Authors: Muñoz González María José
Published: February 2024

La situación de pandemia actual que se vive a nivel mundial y que afecta también a nuestro país ha provocado un vuelco en la forma como se realiza la entrega de contenidos educativos, pasando del modo presencial a la enseñanza online, para la cual estudiantes, docentes y familias a pesar de no encontrarse capacitados, por otra parte no cuentan con las herramientas tecnológicas para ello, programas radiales, canales de televisión han brindado educación a distancia de altura internacional.
Sin embargo, la pandemia de tal manera nos presenta una brecha de diferencias sociales, es así como se encuentran estudiantes que no tienen aparatos tecnológicos adecuados para recibir la enseñanza virtual específicamente aulas en línea, videoconferencias, videos, programas educativos virtuales y a la vez tampoco existe una política pública que considere la capacitación nacional de profesores con una plataforma única para la realización de clases online y offline. Asimismo, de esta manera nace la necesidad imperiosa de continuar asegurando la calidad en la educación en Chile, otros países internacionales, los educadores necesitan las herramientas necesarias para adaptar las metodologías a los nuevos escenarios que la situación sanitaria mundial exige. En esencia, la pandemia del Covid-19 ha generado impacto en diferentes ámbitos de la sociedad al respecto produciendo cambios estructurales.