bluuebunny/crossref_metadata_2025_split huggingface dataset:
Culturas quilombolas invisibilizadas nos currículos de formação de professores: caminhos em Freire para a humanização
Authors: Cabral Libório Andréia Regina Silva , Feldmann Marina Graziela 
Published: November 2021

O presente artigo pondera a invisibilidade acerca de determinadas culturas nos currículos, sobretudo as comunidades de remanescentes de quilombos, bem como da importância dessas serem reconhecidas, acolhidas e valorizadas no seio das instituições educativas, desde as políticas públicas aos currículos e as práticas educativas. Apresenta como objetivo central: compreender as contribuições de Paulo Freire para o processo de humanização dos sujeitos e culturas invisibilizadas nos currículos, especificamente a dos povos quilombolas. A metodologia baseia-se na abordagem qualitativa e a análise a partir do referencial teórico e legislações/documentos selecionados. Com as contribuições de Freire (1981, 1987, 1997); García (1999); Feldmann (2009); Chiavenato (2012); Arroyo (2013); Santomé (2013); Chizotti (2014); Silva (2016) entre outros. Os resultados: revelam a necessidade da compreensão e de um olhar mais sensível a respeito do apagamento, ausência ou silenciamento de determinadas culturas, nos currículos escolares e de formação de professores em detrimento de uma cultura dominante e hegemônica e, a partir das contribuições freireanas evidencia-se que o caminho para a humanização dessas culturas, intermediada por uma pedagogia crítico e emancipadora para libertação e anti-marginalização, precisa partir do “ser para si” no que concerne as suas próprias histórias e de suas realidades concretas, de modo a reconhecer-se e acolher-se as suas especificidades e diversidade cultural, bem como a busca do “ser mais” por meio de suas vozes e relações com o mundo. Ademais, faz-se necessários a visibilidade e o conhecimento sobre os povos/comunidades quilombolas que contribuíram e contribuem na constituição da sociedade brasileira.
Prediction of Mechanical Properties of Hardwood Species Using the Longitudinal Vibration Acoustic Method
Authors: Olaoye Kayode , Aguda Lawrence , Ogunleye Bolade 
Published: November 2021

Abstract
Acoustic test methods such as longitudinal vibration have been developed to predict the elastic properties of wood. However, attention has not been shifted to using this method to predict other mechanical properties, especially on Nigeria's preferred, and lesser-used wood species. Thus, we further investigate relationships among mechanical and acoustic properties of selected hardwood species with a view of predicting the mechanical properties of wood from acoustic parameters. Clear wood samples (324) of 20 by 20 by 20 mm3 were collected axially from Albizia adianthifolia, Gmelina arborea, Delonix regia, and Boscia anguistifolia trees, and conditioned before testing. The longitudinal vibration method was adopted to test for the dynamic (acoustic) parameters and properties (fundamental frequency, damping factor, dynamic modulus of elasticity, sound velocity, specific elastic modulus, radiation coefficient, acoustic conversion efficiency, acoustic impedance) while the universal testing machine was used to test for the mechanical properties (static modulus of elasticity, modulus of rupture, maximum compression strength parallel to grain). The damping factor, dynamic modulus of elasticity, and acoustic impedance were the best acoustic parameters that significantly correlated with the static modulus of elasticity (−0.57, 0.81, 0.76), modulus of rupture −0.64, 0.82, 0.85) and maximum compression strength parallel to grain (−0.52, 0.78, 0.84), respectively. There was a significant difference in the mechanical properties with respect to species, thus A. adianthifolia and G. arborea were mechanically better than D. regia and B. anguistifolia for construction or structural purposes. This study revealed that additional new acoustic measures are suitable for inferring mechanical wood properties.
VLCIoT: design and implementation of a visible light communication system for indoor Internet of Things applications
Authors: Makvandi Armin , Kavian Yousef Seifi , Namjoo Ehsan 
Published: November 2021

In this paper, a visible light communication (VLC) system for indoor Internet of Things (IoT) applications, called VLCIoT, is proposed. The proposed system is based on type I of the IEEE 802.15.7 standard physical (PHY) layer. The PHY I is provided for low data rate applications from 10 to 100 kb/s, which looks suitable for the typical IoT applications. The on-off keying suggested modulation scheme by the PHY I that is simple and requires low-cost hardware for implementation is considered. The implemented VLCIoT system is robust against indoor ambient light interference. Using the frequency division multiple access, several VLC networks can operate at different frequencies in the vicinity of each other without interference. The data rate of VLCIoT is up to 115.2 kb/s, and the bit error ratio of the system is very low. This system is designed for indoor, which for this purpose operates well up to 7 m distances. In this paper, a figure of merit (FoM) is proposed, in which the most important parameters for IoT applications are considered. A comprehensive comparison of VLCIoT to other suitable VLC systems for IoT applications is performed. The results show that the VLCIoT achieves the best FoM and is suitable for indoor IoT applications.
Effective interference mitigation scheme for multi-LED-based mobile optical camera communication
Authors: Yang Yiting , He Jing , Zhou Biao 
Published: November 2021

Recently, optical camera communication (OCC) based on light-emitting diodes (LEDs) and complementary metal oxide semiconductor (CMOS) image sensors has received extensive attention due to its low cost and high flexibility. However, considering that the location of the user with a CMOS image sensor changes frequently, multi-LEDs are required to achieve seamless communication. In the paper, to mitigate random interchannel interference in overlapping areas of LED radiation, an effective identification recognition and sorting-based column selection are proposed. Meanwhile, to alleviate the distortion of bright and dark stripes caused by overlapping exposure time and user movement, an improved sampling scheme based on length estimation is proposed and experimentally demonstrated in a multi-LED-based mobile OCC system. Moreover, by varying the overlap rate of the adjacent LEDs’ radiation area and the moving speed of the user, respectively, the performance of the system is investigated. The experimental results show that, the bit error rate (BER) performance of the system decreases slightly with the increasing of moving speed, but it is lower than the hard-decision forward error code rate limit. In addition, at the overlap rate of the LED radiation area of 4.3% and the moving speed of 80 cm/s, the BER is close to

10

−
6

using the proposed scheme.
Graphene-based dual functional metadevice in the THz gap
Authors: Kumar Ghosh Sambit , Das Santanu , Bhattacharyya Somak 
Published: November 2021

This paper presents a graphene-metal dual functional metadevice to provide two separate applications simultaneously, viz., absorption and cross-polarization conversion (CPC) of the electromagnetic (EM) wave without any structural deformations in the terahertz (THz) gap under two different biasing conditions. The meta-atom of the device bears stacked layers of metallic elliptical-shaped split rings, a thin zinc oxide (ZnO) layer, a slotted graphene layer printed over another ZnO layer backed by a continuous gold plate. It provides more than 70% absorptivity over a bandwidth of 3.40 THz (4.25 THz and 7.65 THz), with 90% absorptivity peak at 6.84 THz when the externally applied static electric field (

ξ

) on the patterned graphene surface is 8.52 V/nm. The change of the

ξ

to a value of 0.44 V/nm enables the device to produce a CPC ratio (CPCR) above 90% over a bandwidth of almost 3.87 THz (2.22 THz and 6.09 THz), with near unity polarization conversion ratio peaks occurring at 2.38 THz, 3.80 THz, and 5.82 THz. Both findings have been validated using an exhaustive equivalent circuit analysis. The design possesses ultrathin properties (

λ
0

/

12.49

), along with compactness (

λ
0

/

5

), which has been improved significantly compared to their microwave counterparts. The proposed metadevice finds useful applications in THz sensing, stealth technology, THz communication, detection, polarization manipulation of EM waves, etc.
Effectiveness of vaccination against SARS-CoV-2 infection and Covid-19 hospitalisation among Finnish elderly and chronically ill—An interim analysis of a nationwide cohort study
Authors: Baum Ulrike , Poukka Eero , Palmu Arto A. , Salo Heini , Lehtonen Toni O. , Leino Tuija 
Published: November 2021

Background
In Finland, both mRNA and adenovirus vector (AdV) Covid-19 vaccines have been used after the vaccination campaign started on December 27, 2020. Vaccination of the elderly and chronically ill was prioritized and the interval between doses set to 12 weeks. The objective of this interim analysis was to evaluate first and second dose vaccine effectiveness (VE) in a real-world setting.

Methods
During the first five months of the campaign, a register-based cohort study was conducted in the Finnish elderly aged 70+ years and those aged 16–69 years with medical conditions predisposing to severe Covid-19 (chronically ill). Using Cox regression, VE against SARS-CoV-2 infection and Covid-19 hospitalisation was estimated comparing the hazard in the vaccinated with that in the unvaccinated.

Results
The cohorts included 901092 elderly (89% vaccinated) and 774526 chronically ill (69% vaccinated) individuals. Three weeks after the first dose, mRNA VE against infection was 45% (95% confidence interval, 36–53%) and 40% (26–51%) in elderly and chronically ill; mRNA VE against hospitalisation was 63% (49–74%) and 82% (56–93%). In chronically ill, AdV VE was 42% (32–50) and 62% (42–75%) against infection and hospitalisation, respectively. One week after the second dose, mRNA VE against infection was 75% (65–82%) and 77% (65–85%) in elderly and chronically ill; mRNA VE against hospitalisation was 93% (70–98%) and 90% (29–99%).

Conclusions
Covid-19 vaccines protect against SARS-CoV-2 infection and Covid-19 hospitalisation. A single dose provides moderate protection in elderly and chronically ill, although two doses are clearly superior.
Maternal smoking behaviour across the first two pregnancies and small for gestational age birth: Analysis of the SLOPE (Studying Lifecourse Obesity PrEdictors) population-based cohort in the South of England
Authors: Taylor Elizabeth J. , Doh Pia , Ziauddeen Nida , Godfrey Keith M. , Berrington Ann , Alwan Nisreen A. 
Published: November 2021

Maternal smoking is established to cause adverse birth outcomes, but evidence considering maternal smoking change across successive pregnancies is sparse. We examined the association between self-reported maternal smoking during and between the first two pregnancies with the odds of small for gestational age (SGA) birth (<10thpercentile) in the second infant.Records for the first two pregnancies for 16791 women within the SLOPE (Studying Lifecourse Obesity PrEdictors) study were analysed. This is a population-based cohort of prospectively collected anonymised antenatal and birth healthcare data (2003–2018) in Hampshire, UK. Logistic regression was used to relate maternal smoking change to the odds of SGA birth in the second infant.In the full sample, compared to never smokers, mothers smoking at the start of the first pregnancy had higher odds of SGA birth in the second pregnancy even where they stopped smoking before the first antenatal appointment for the second pregnancy (adjusted odds ratio (aOR) 1.50 [95% confidence interval 1.10, 2.03]). If a mother was not a smoker at the first antenatal appointment for either her first or her second pregnancy, but smoked later in her first pregnancy or between pregnancies, there was no evidence of increased risk of SGA birth in the second pregnancy compared to never smokers. A mother who smoked ten or more cigarettes a day at the start of both of her first two pregnancies had the highest odds of SGA birth (3.54 [2.55, 4.92]). Women who were not smoking at the start of the first pregnancy but who subsequently resumed/began smoking and smoked at the start of their second pregnancy, also had higher odds (2.11 [1.51, 2.95]) than never smokers.Smoking in the first pregnancy was associated with SGA birth in the second pregnancy, even if the mother quit by the confirmation of her second pregnancy.
Effectiveness of 3D-printed orthoses for traumatic and chronic hand conditions: A scoping review
Authors: Oud T. A. M. , Lazzari E. , Gijsbers H. J. H. , Gobbo M. , Nollet F. , Brehm M. A. 
Published: November 2021

Background
In the field of orthotics, the use of three-dimensional (3D) technology as an alternative to the conventional production process of orthoses is growing.

Purpose
This scoping review aimed to systematically map and summarize studies assessing the effectiveness of 3D-printed orthoses for traumatic and chronic hand conditions, and to identify knowledge gaps.

Methods
The Cochrane Library, PubMed, EMBASE, CINAHL, Web of Science, IEEE, and PEDro were searched for studies of any type of 3D-printed orthoses for traumatic and chronic hand conditions. Any outcome related to the effectiveness of 3D-printed orthoses was considered. Two reviewers selected eligible studies, charted data on study characteristics by impairment type, and critically appraised the studies, except for case reports/series.

Results
Seventeen studies were included: four randomized controlled trials, four uncontrolled trials, four case series and five case reports. Only three studies had a sample size >20. Impairments described were forearm fractures (n = 5), spasticity (n = 5), muscle weakness (n = 4), joint contractures (n = 2) and pain (n = 1). Four poor to fair quality studies on forearm fractures supported the effectiveness of 3D-printed orthoses on hand function, functionality, and satisfaction. One good quality study on spasticity demonstrated the effectiveness of 3D-printed orthoses on hand function. One poor quality pain study reported limited positive effects on satisfaction. Studies on muscle weakness and joint contractures showed no benefits.

Conclusion
Current literature addressing the effectiveness of 3D-printed orthoses for traumatic and chronic hand conditions consists primarily of small and poor methodological quality studies. There is a need for well-designed controlled trials including patient-related outcomes, production time and cost analyses.
Psychiatric behavioral effect and characteristics of type 2 diabetes mellitus on Japanese patients with Prader-Willi syndrome: a preliminary retrospective study
Authors: Oto Yuji , Murakami Nobuyuki , Inoue Takeshi , Matsubara Keiko , Saima Sohei , Ogata Hiroyuki , Ihara Hiroshi , Nagai Toshiro , Matsubara Tomoyo 
Published: November 2021

Abstract

Objectives
In recent years, research on behavioral and psychiatric problems of adults with Prader-Willi syndrome (PWS) has gained attention. However, no report is available regarding the relationship between psychiatric illness and type 2 diabetes mellitus (T2DM) in patients with PWS. Therefore, we evaluated a behavioral assessment to address the lack of data on the association between psychiatric behavior and T2DM.

Methods
This was a retrospective single-center study of patients with PWS. Patients with PWS whose blood tests were performed in our hospital between January 2018 and December 2019 and aged >10 years were included. We evaluated the data, including the behavioral patterns of Japanese PWS patients with T2DM.

Results
Overall, 114 patients were evaluated; 33 patients (28.9%) developed T2DM. The age of T2DM onset was 18.0 years (interquartile range [IQR], 14.6–21.4 years). The median body mass index at T2DM onset was 33.7 kg/m2 (IQR, 30.0–37.4 kg/m2). Between-group comparisons of the intelligence quotient, Food-Related Problem Questionnaire (FRPQ), and Japanese versions of the Short Sensory Profile and Aberrant Behavior Checklist showed a significant difference only in FRPQ scores (p=0.003).

Conclusions
The occurrence of T2DM among Japanese patients with PWS remains high. Only the FRPQ was significantly different between the T2DM and the non-T2DM group.
Preparation and characterization of polydimethylsiloxane-based composite films
Authors: Kılıç Enver Can , Salt Yavuz 
Published: November 2021

Abstract
In this study, we aimed to find the characteristic properties of the neat and the composite polydimethylsiloxane (PDMS) films. The composite films were prepared by adding 5 A and NaY zeolites and nano-TiO2 to PDMS polymer matrix. In the preparation of the composite polymer films, the inorganic additives were added by 10 wt.-%. The structural and thermal characteristics of the prepared homogenous PDMS film and composite PDMS films were determined by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). The glass transition temperature of the films was found by differential scanning calorimetry (DSC). Finally, the mechanical properties of the films were obtained through tensile tests. The effects of 5 A and NaY zeolites and TiO2 on the neat PDMS films were investigated.
Impact behavior of natural rubber based syntactic foam core sandwich structures
Authors: Güçlü Harun , Kasım Hasan , Kürşad Türkoğlu İ. , Can Yücel , Yazıcı Murat 
Published: November 2021

Abstract
In this study, the impact behavior of sandwich panels of natural rubber-based syntactic foam cores with aluminum face sheets was investigated experimentally and with the help of finite element analysis (FEA). Syntactic foam cores were produced byadding glass bubbles (GB) to the natural rubber (NR). Natural rubber was dissolved at room temperature with chemical solvents mixed with glass bubbles at 10, 20, and 30 weight percentages. Very low density (~0.8 g × cm-3) and high compressible foams were obtained depending on the GB weight percentages. Aluminum face sheets and the NR/GB syntactic foam core developed were joined by adhesive bonding to produce sandwich beam specimens. The sandwich beams manufactured in this way were subjected to impact loading under three-point bending boundary conditions experimentally. The experimental results were compared with finite element simulation results under the same loading and boundary conditions. The damage mechanism of the sandwich panels devised were analyzed. According to the results, natural rubber containing an additive of 20 wt.-% GBs showed better impact resistance than the others.
Optimization of casting parameters for improved mechanical properties of eggshell reinforced composites
Authors: Dwivedi Shashi Prakash , Maurya Nagendra Kumar , Maurya Manish , Saxena Ambuj , Srivastava Ashish Kumar 
Published: November 2021

Abstract
The tensile strength, hardness and toughness of any materials are the most important mechanical properties in the selection of materials for varied industrial applications. In the development of aluminum based composite material, tensile strength and hardness were significantly improved by adding various ceramic reinforcement particles. However, toughness was reduced. In this research work, an attempt was made to enhance tensile strength, hardness and toughness simultaneously by using carbonized eggshell as reinforcement material developed via electromagnetic stir casting. The process parameters used in this study are the matrix pouring temperature, wt.-% of the reinforcement; preheat temperature, stirring current and stirring time. Response surface methodology (RSM) is used for conducting the experiment. The multi-objective optimization technique utility theory is employed to optimize the combined mechanical properties viz. tensile strength, hardness and toughness. Microstructure results show that at the optimum level of process parameters, eggshells are uniformly distributed. Confirmation tests are conducted to validate the experimental results. Experimental results revealed that at optimum process parameters, hardness and tensile strength are significantly improved without affecting the toughness property of the composite. The optimum level of process parameters to enhance all mechanical properties (tensile strength, hardness and toughness) were found to be a reinforced preheating temperature of about 448.32 °C, a stirring current of about 11.64 A, a stirring time of about 63.64 s, a maximum pouring temperature of about 800.24 °C and a percentage of eggshells of about 9.16 %. The novelty of this work lies in the fact that no attempt was made to optimize these electromagnetic process parameters. Corrosion loss, thermal expansion behavior and a wear test were investigated to observe the effect of adding eggshell at optimum electromagnetic stir casting parameters.
Treatment of acromegaly has substantial effects on body composition: a long-term follow-up study
Authors: Wolf Peter , Salenave Sylvie , Durand Emmanuel , Young Jacques , Kamenicky Peter , Chanson Philippe , Maione Luigi 
Published: November 2021

Background
Acromegaly is associated with changes in body composition. Long-term changes following acromegaly treatment and the impact of different treatments have been less investigated.

Methods
We performed a retrospective study in 201 patients with acromegaly. Body composition was assessed by dual-energy X-ray absorptiometry. To investigate the specific effects of treatment vs aging, changes in body composition were compared in one group of patients evaluated both at the time of active and controlled disease (active-to-controlled (A>C); n  = 31) and in another group of patients evaluated two times while the disease was controlled (controlled-to-controlled (C>C); n  = 32).

Results
In the whole cohort, insulin-like growth factor I (IGF-I) was correlated with fat (r = −0.369; P  < 0.001) and lean mass (r = 0.383; P  < 0.001). Patients from A>C and C>C groups were comparable for age, sex, BMI and follow-up duration (P = n.s.). Reduction in IGF-I levels was associated with an increase in fat mass and a decrease in lean mass in the A>C group, which was four and eight times more pronounced compared to the C>C group (fat mass: +39 ± 34% vs +10 ± 15%, P  < 0.001; lean mass: −8 ± 8% vs −0.2 ± 6%, P  < 0.001, respectively). Changes in fat mass were negatively associated with IGF-I (r = −0.450; P = 0.011) and independent of the individual therapy. The daily dose of pegvisomant correlated with fat mass (r = 0.421; P = 0.002) and insulin sensitivity index (r = −0.466; P  < 0.001).

Conclusions
Treatment of acromegaly strongly impacts body composition until biochemical disease remission, characterized by an increase in fat mass and a decrease in lean mass. These changes are closely associated with the normalization of IGF-I. Thereafter, body composition changes are similar to what is observed with aging.