bluuebunny/crossref_metadata_2025 huggingface dataset:
Feminismo Matricêntrico e contranarrativas de maternagem das entrevistadas da plataforma Cientista Que Virou Mãe
Authors: Lemes Luana Borges
Published: March 2023

Este trabalho aborda o conceito de Feminismo Matricêntrico, de Andrea O’Reilly (2016), para fundamentar contranarrativas de maternagem nos relatos das entrevistadas da plataforma Cientista Que Virou Mãe. Objetiva-se compreender como elas atribuem suas práticas de maternagem às suas militâncias feministas, a partir da história das mulheres, dos estudos de gênero, sobre representações maternas.

PALAVRAS-CHAVE: Maternagem. Gênero. Feminismo. Prática Discursiva.
AGRONEGÓCIO E ACIDENTES DE TRABALHO LETAIS EM ARMAZÉNS GRANELEIROS DO MATO GROSSO (2019-2021)
Authors: Nascimento Luciano Bomfim do , Binsztok Jacob
Published: March 2023

Objetivo: Delinear a distribuição e caracterização dos acidentes letais em armazéns de grãos do Mato Grosso ocorridos entre 2019 e 2021, identificando as principais causas dos óbitos nessas importantes instalações do agronegócio brasileiro. Métodos: Pesquisa documental referente a consultas em jornais eletrônicos e sites de notícias sobre os casos ocorridos no período delimitado, por meio da ferramenta de busca do google, além de revisão da literatura sobre acidentes e segurança de trabalho em ambientes confinados e as condições de reprodução do espaço agrário, e de consulta aos bancos de dados da Conab, IBGE e demais instituições similares. Resultados: A pesquisa constatou que há um padrão de distribuição geográfica das mortes concentradas no Centro-sul, circunscritas às áreas produtoras de grãos, com o estado de Mato Grosso liderando o ranking com 17 casos, quase a metade dos ocorridos no país (37). Além disso, revelou o não cumprimento rigoroso das normas de segurança (NR) como a principal causa das mortes – em 70% dos óbitos os funcionários não faziam uso dos equipamentos de segurança necessário para a função. Conclusão: A partir da identificação e análise dos casos em pontos específicos, foram sugeridas medidas que tencionam reduzir ou eliminar os acidentes nos municípios identificados na pesquisa.
Analysis of Antioxidant, Antidiabetic Potential, and Corosolic Acid Content in Prunus Padus Leaves
Authors: Kharyal Sudhir , Puri Richa
Published: March 2023

This research was conducted to detect corosolic acid, in vitro antioxidant and antidiabetic effect of Prunus padus leaf, also called Bird cherry and is a member of Rosaceae. It is a medium-sized tree with obovate, fine serrated leaves and white flowers. According to the HPLC Chromatogram of standard corosolic acid, leaf samples of Prunus padus displayed a peak with a retention time of 9.855 min. Quantitative analysis revealed a good concentration of corosolic acid i.e 8.032 μg/20 mg d w. In vitro studies showed potent antidiabetic and antioxidant activities DPPH radical scavenging test of Prunus padus showed 91.90 per cent inhibition and standard ascorbic acid showed 82.39 per cent inhibition at 250 μg/ml concentration. Acarbose and Prunus padus both have IC50 values of 193.62 ± 0.634 μg/ ml and 114.72 ± 1.038 μg/ ml, accordingly, as determined by an alpha amylase inhibition experiment. The results demonstrate that Prunus padus possesses a good amount of corosolic acid and can be considered a natural source, which is very influential in neutralizing the reactive oxygen species and damage caused by diabetes and has strong antioxidant and antidiabetic effects.
A Novel Scheme of an Optimal Data Rate Transmission for Airborne Telemetry of Long Range Aerospace Vehicle
Authors: Karnati Sudarsana Reddy , Boppanna Lakshmi , Jahagirdar D.R.
Published: March 2023

Airborne telemetry data is inevitable during the development phase of an aerospace vehicle. With the availability of telemetry data the vehicle characteristics are evaluated and the vehicle objectives are achieved subsequently. During the trajectory path, the airborne telemetry system transmits vehicle data continuously and ground receiving station receives it. The availability of data at ground station is solely dependent on various parameters; primarily data rate, modulation, RF power, etc. In this paper, typical data rate of telemetry for long range aerospace vehicle is analyzed and an innovative scheme is proposed for optimal data rate transmission with multi-resolution of high speed image data for distributed telemetry system. The scheme is implemented on 25 nm ZYNQ CSOC of telemetry hardware and synthesized netlist is simulated, performance is evaluated and results verified on telemetry hardware.
An Architecture for On board Frequency Domain Analysis of Launch Vehicle Vibration Signals
Authors: Srinivasan R , Lakshmi B , Thomas Tessy
Published: March 2023

The dynamic properties of the airborne structures plays a crucial role in the stability of the vehicle during

flight. Modal and spectral behaviour of the structures are simulated and analysed. Ground tests are carried out with environmental conditions close to the flight conditions, with some assumptions. Subsequently, based on the flight telemetered data, the on-board mission algorithm and the auto-pilot filter coefficients are fine tuned. An attempt is made in this paper to design a novel architecture for analysing the modal and spectral random vibration signals on-board the flight vehicle and to identify the dominant frequencies. Based on the analysed results, the mission mode algorithm and the filter coefficients can be fine tuned on-board for better effectiveness in control and providing more stability. Three types of windows viz. Hann, Hamming and Blackman-Harris are configured with a generalised equation using FIR filter structure. The overlapping of the input signal data for better inclusiveness of the real-time data is implemented with BRAM. The domain conversion of the data from time domain to frequency domain is carried out with FFT using Radix-2 BF architecture. The FFT output data are processed for calculating the power spectral density. The dominant frequency is identified using the array search method and Goldschmidt algorithm is utilised for the averaging of the PSDs for better precision. The proposed architecture is synthesised, implemented and tested with both Synthetic and doppler signal of 300 Hz spot frequency padded with Gaussian white noise. The results are highly satisfactory in identifying the spot frequency and generating the PSD array.
Evaluation of Seismic Behavior Due to Vertical Irregularities in High Rise Reinforced Concrete Buildings
Authors: Prayuda Hakas , Wilasamba Ogata , Saleh Fadillawaty , Maulana Taufiq Ilham , Firdausa Fadhila
Published: March 2023

This study investigated the behavior of high-rise reinforced concrete structures with vertical irregularities caused by seismic loading. The ability of the building to endure all of the load during operation should be considered in design process. The irregularities in the building cause to impair stiffness and performance of the structure, particularly during the earthquake. Therefore, it is necessary to evaluate the effects of vertical irregularities on building, especially high-rise buildings. This study employs an S-Shaped structure with five vertical irregularities. Numerical analysis was used by using STEDA 3D software. The dynamic load used is based on time history data from the previous earthquakes, including the El-Centro, Kobe, and Parkfield. The seismic behavior evaluated in this study consist of shear force, lateral deformation, structural stiffness, the relationship between base shear and top displacement, drift ratio, maximum acceleration response, capacity curve, and top orbit of the building. Based on the numerical analysis results, it can be concluded that each model has a different seismic performance even though it is given the same earthquake load and material properties. The vertical irregularity of the building greatly affects the behavior of the structure due to seismic analysis.
The Effect of Peat Water Soaking on The Durability of AC-WC
Authors: Harahap Amal Risky , Wiyono Sugeng , Elizar Elizar , Puri Anas
Published: March 2023

Puddles such as peat water on the surface of the bending pavement can accelerate the aging process, disintegration and cause damage. The purpose of the study was to determine the effect of the aging process due to peat water soaking on the durability of the AC-WC mixture penetration 60/70 based on the Cantabro test. Research methods are laboratory tests that start from the design of asphalt concrete mixtures, determining KAO, LTOA tests, peat water chemical element tests. Soak asphalt concrete with peat water for 0, 1, 2, 4, and 7 days, CL Test and Marshall test. 7-day duration CL value 23.6%, stability 1805 kg, IDP 37%, IDK 34%. The chemical reaction element that causes LTOA is the oxidation reaction of asphaltenes due to the increase of the element oxygen that removes nitrogen (N) and alkyl chains (R). The chemical reaction element that causes aging due to peat water, namely organic substances affect the pH value depending on the number of lignin compounds. Lignin produces H ions that can accelerate aging. The pH value of peat water is 3, Na 78.81 mg/l, Fe 0.47 mg/l, organic substances 148.52 mg/l.
Probabilistic Seismic Hazard Analysis at New Capital in Indonesia
Authors: Mountainshia Rocky , Rahardjo Paulus Pramono , Aditramulyadi Dega Damara
Published: March 2023

Efforts to move the Capital of Indonesia to Kalimantan are intended to solve the problem of overpopulation in Jakarta, so it’s possible there are massive infrastructure development in the future. In this study conducted Probabilistic Seismic Hazard Analysis (PSHA) and made an earthquake hazard map that serves to analyze earthquake-resistant buildings for the New Capital of Indonesia. The PSHA and earthquake map was developed for 2% probability exceeded in 50 years or 2500-return period. The results of the analysis on three important periods, comprised of PGA, Ss, and S1 with a return period of 2500 years have higher acceleration at bedrock if performed by GMPE 2017 rather than GMPE 2010 for the period between PGA and 0.1s. Maximum earthquake acceleration on bedrock resulting from the creation of earthquake hazard maps in New Capital of Indonesia for period of PGA, 0.2s, and 1.0s at bedrock for return period of 2500 years is 0.2-0.25g, 0.4-0.5g, and 0-0.15g, respectively. The earthquake threat index in the New Capital of Indonesia is categorized as low according to Indonesia's National Board for Disaster Management (BNPB) regulations (PGA<0.2501g).
Study of Flexural Behavior of FJLB Beams made of Rubber Wood Species (Hevea Brasiliensis)
Authors: Shulhan M. Afif , Awaludin Ali , Nugroho Maris Setyo , Octavia Sherly
Published: March 2023

This study is aimed to determine the flexural behavior of Rubberwood FJLB (finger jointed laminated board) beams as building structural components. It was carried out through experimental approach and numerical analysis on six specimens of FJLB beams having a cross-section of 100 mm by 150 mm and a length of 2850 mm. The experiment was consisted of small specimen tests (BS-373:1957) and four-point bending test (EN-408) with two different cross-sectional orientations (flatwise and edgewise). The numerical analysis was performed by conducting 2-D finite element analysis developed in MATLAB program based on plane stress assumption. It was found that the average flexural capacity of beams tested under edgewise orientation was 24.6 kN, which is higher than that of the beams tested under flatwise orientation, 19.7 kN. However, the flexural stress (modulus of rupture) of those beams was about the same. All the beams experienced brittle failure caused by glueline failure between laminas or at finger joints. The results of strain measurement at mid-span of the beams throughout the test showed that the FJLB beams failed within elastic response. This finding was confirmed by the numerical analysis results.
Local Inflow Analysis of Jatiluhur Reservoir Using HEC-HMS
Authors: Novrizal Dedi , Hermawan Ferry , Wibowo Mochamad Agung , Nasution Ifan Azwar
Published: March 2023

Inflow in Jatiluhur Reservoir located on the Citarum River is influenced by outflow from Cirata Reservoir and Saguling Reservoir which are above it. These three reservoirs are incorporated in the Citarum Cascade System Reservoir. This inflow analysis is related to the availability of water in the Jatiluhur Reservoir, which is a multi-purpose reservoir, which then becomes the mainstay of the water supply as a hydropower operation pattern. Runoff rain modeling using HEC-HMS software using data on rainfall, temperature, land cover, soil type and topography. Parameters generated from observation and modeling are coefficient of determination (R2), Nash-Stuclift (NSE), and Percent Bias (PBIAS). The results of the case study show that the parameters of the observed local inflow (R2: 0.693; NSE: 0.525; PBIAS: 9.88%) with data sources from the Jatiluhur Reservoir manager are better than the local inflow analysis results (R2: 0.533; NSE: - 0.457; PBIAS: 48.88%) with data sources from water level (TMA). Meanwhile, the total inflow of observations (R2: 0.982; NSE: 0.973; PBIAS: 1.14%) with data sources from the Jatiluhur Reservoir manager is better than the total inflow analysis results (R2: 0.932; NSE: 0.889; PBIAS: 9.43 %) with the data source from the water level (TMA).
Sexual Behavior of Men Who Have Sex with Men and Its Relationship to Sexually Transmitted Infections during an Outbreak of the Human Monkeypox Virus
Authors: Otivo Raúl Montalvo , Crisostomo Sonia , Zevallos Liz , Ninahuanca Carina , Montalvo Miguel
Published: March 2023

Background: There is a high frequency of monkeypox (MPOX) and sexually transmitted infections (STIs) in men who have sex with men (MSM). Aim: To identify the sexual behavior of MSM during the MPOX infection period. Methods: We conducted an observational study of cases and controls were carried out. Results: A total of 171 participants were considered, two heterosexual male controls (MSW) were included for each case of MSM with a consecutive selection of people who attended the STI prevention and control center from January to July 2022. The results revealed that the mean number of sexual partners reported in the last year was higher in cases (4.2) compared to controls 1.9 (p < 0.05). The related conditions for MSM to acquire some type of STI were sexual intercourse under the influence of alcohol (OR 2.42; 95% CI: 1.11–3.96), forgetting to use a protection method (condom) (OR 3.16; 95%: 1.73–7.48) and sexual intercourse with casual couples (OR 1.4; 95% CI: 1.01–2.16). Conclusion: Our findings demonstrated a link between the sexual behavior of men who have sex with men and the high prevalence of sexually transmitted infections during the human monkeypox virus outbreak.
Group Portrait of the Galician Oil Entrepreneurs
Authors: Franaszek Piotr
Published: March 2023

When presenting the careers of entrepreneurs operating on Polish soil at the turn of the 19th and 20th centuries, researchers usually focus on individuals operating in the most industrialised areas, especially the Kingdom of Poland. Much less attention has been paid to successful entrepreneurs in Galicia. Studies on Galician entrepreneurship have mainly taken the form of biographical entries in encyclopaedias and lexicons and in the Polish Biographical Dictionary. These are profiles of individual business leaders of the Austrian partition, while far fewer works deal with the issue of entrepreneurs as a group, despite the fact that there are many sources for such research. This article is an attempt to create a group portrait of a number of Galician oil entrepreneurs who played an exceptional role in the economic, the social, and the political life of Galicia.
Report from the Academic Session “Human and Nature: Between Destruction and Creation” Organized as Part of the 23rd International Congress of Historical Sciences in Poznań on 24th August 2022
Authors: Janicki Tadeusz
Published: March 2023

Broadly defined environmental history was the context for the session entitled “Human and nature: Between destruction and creation”, organized and conducted on 24th august 2022 by prof. tadeusz Janicki (Faculty of History, UAM, Poznań, Poland) and prof. Dariusz Gwiazdowicz (Department of Forest Protection, Poznań University of Life Sciences, Poland) as part of the 23rd International Congress of Historical Sciences Poznań 2022.
Golf Lobby and Anti-Grafting Law: Evidence from South Korea
Authors: Cho Joonmo , Jeong Yeasung
Published: March 2023

In 2016, the Improper Solicitation and Graft Act entered into force in South Korea, which prohibits any improper activities that can be regarded as lobbying. The Golf industry was expected to have a direct effect from the Act since the sport of golf in Korea has been regarded as highly political. Therefore, this study focuses on the impact of the Act on the demands of golf. Our empirical analysis shows that the Act led to a decrease in the number of visitors and membership prices of private golf courses. The results indicate that those who had regarded golf as a political activity may now have little incentive to be involved in lobbying held on private golf courses.
Die Leipziger Autoritarismus Studie 2022: Zentrale Ergebnisse
Authors: Decker Oliver , Kiess Johannes , Heller Ayline , Schuler Julia , Brähler Elmar
Published: March 2023

In der Aktuellen Analyse stellen Oliver Decker, Johannes Kiess, Ayline Heller, Julia Schuler und Elmar Brähler zentrale Ergebnisse der Leipziger Autoritarismus Studien 2022 (LAS) vor. Diese untersuchen rechtsextreme Einstellungen in Deutschland im Langzeitverlauf. Seit 2002 wird im Zweijahresrhythmus eine repräsentative Stichprobe der deutschen Bevölkerung zu einer Bandbreite politischer Themen befragt. Bekannt wurde die Studienreihe bis 2016 unter dem Namen Leipziger »Mitte«-Studien. Seit 2018 erscheint die Studie unter einem neuen Reihentitel, der eine Fokusverschiebung von der Problemanzeige zur Problemanalyse markiert. Die Studie zeigt auf, wie weit verbreitetet antidemokratischen Ressentiments in der Bevölkerung sind und sie rekonstruiert über die Jahre die Entwicklung der psychosozialen Dynamiken, die diesen antidemokratischen Reaktionen zu Grunde liegen. Der Beitrag fasst die zentralen Ergebnisse der diesjährigen Erhebung und Veränderungen in den letzten 20 Jahren zusammen.
Wiederkehrende Wohnungsnot und kritische wie konstruktive Beiträge sozialer Bewegungen
Authors: Breckner Ingrid
Published: March 2023

Dieser Beitrag thematisiert im ersten Abschnitt verschiedene Aspekte von Wohnungsnot im 21. Jahrhundert, die keineswegs neu sind, sondern in sich wandelnden Ausprägungen seit 150 Jahren immer wieder nachgewiesen wird. Der zweite Abschnitt fokussiert kritische und konstruktive Beiträge sozialer Bewegungen zu aktuellen Wohnungsnöten. Abschließend wird auf Handlungsansätze eingegangen, die in Koproduktion unterschiedlicher Akteure einen Abbau von Wohnungsnöten ermöglichen könnten.
Soziale Bewegungen und Selbstorganisation im Wohnungsbau
Authors: Metzger Joscha
Published: March 2023

Bewegungen für Mieter*innenrechte und selbstverwaltetes Bauen erscheinen oft als Gegensatz. Im vorliegenden Text vertrete ich dagegen die These, dass es sich hierbei viel eher um sich ergänzende politische Kämpfe handelt: Selbstorganisierte Wohnungsbauvorhaben finden gerade dann günstige Gründungsbedingungen vor, wenn zeitgleich die etablierten Strukturen der Wohnungswirtschaft kritisiert und angegriffen werden. Gleichzeitig sind Projekte
von unten lebende Beispiele dafür, dass es sehr wohl auch anders geht und können weiteres Engagement inspirieren. Beispiele dafür finden sich insbesondere in der Genossenschaftsbewegung der 1920er und 1980er Jahre. Offen ist die Frage, inwieweit die Verbindung zwischen Mieter*innenorganisationen und selbstorganisiertem Wohnungsbau im Hamburg der Gegenwart intensiviert werden kann.
SIW-cavity based frequency reconfigurable antenna for IoT, WLAN, and 5G applications
Authors: Sharma Babu Lal , Mathur Dhirendra , Sharma Madan Kumar
Published: March 2023

In order to minimize antenna complexity and improve gain, a new compact size low profile SIW-cavity-based frequency reconfigurable antenna is presented for IoT, WLAN, and 5G applications. The proposed antenna miniaturization is achieved by incorporating SIW cavity using metallic vias. The reconfiguration mechanism is accomplished by etching a circular ring slot and a C-shaped slot at the top metallic layer of the substrate. The frequency switching mechanism from low to high state is provided by eight PIN diodes. The diodes are placed in a symmetrical order along circular ring slot. All the diodes are switched on simultaneously to achieve low-frequency state operation. However, the off state of the diodes shifts antenna operation from low to high-frequency state. The antenna is fabricated on a small size substrate with an overall electrical size of (0.4λ* 0.4λ).The proposed antenna resonates at frequencies 2.4, and 3.45 GHz with 220 MHz and 470 MHz bandwidth respectively in low-frequency state. In high-frequency state, the antenna resonates at 5.8 GHz with 200 MHz bandwidth. The proposed antenna achieves peak gain of 6.3, 6.7, and 5.9 dBi in the three bands, and stable radiation patterns are attained in the working frequency band of the antenna.
Reinforcement learning with Gaussian process regression using variational free energy
Authors: Kameda Kiseki , Tanaka Fuyuhiko
Published: March 2023

The essential part of existing reinforcement learning algorithms that use Gaussian process regression involves a complicated online Gaussian process regression algorithm. Our study proposes online and mini-batch Gaussian process regression algorithms that are easier to implement and faster to estimate for reinforcement learning. In our algorithm, the Gaussian process regression updates the value function through only the computation of two equations, which we then use to construct reinforcement learning algorithms. Our numerical experiments show that the proposed algorithm works as well as those from previous studies.
A construction of encryption protocols over some semidirect products
Authors: Isobe Shuji , Koizumi Eisuke
Published: March 2023

In CANDARW ’18, Isobe et al. proposed a secure encryption protocol on non-abelian groups based on the Anshel–Anshel–Goldfeld key exchange protocol. There have remained two weak points on the protocol: one is that the protocol is indistinguishable against adaptive chosen ciphertext attack (IND-CCA) in a slightly restricted sense, what they call IND-rCCA secure, and the other is that the conditions imposed on groups and hashing schemes are too strict to make the protocol practical. In this article, we propose an IND-CCA secure protocol that resolves those problems. The key idea is to employ some specific semidirect product as platform groups, so that we can achieve the exact IND-CCA security from concise conditions on groups and hashing schemes. Our protocol is not dependent on any computational assumptions on abelian subgroups.
Analytical and numerical study for the generalized q-deformed sinh-Gordon equation
Authors: Ali Khalid K.
Published: March 2023

In this article, we study the generalized

q

q

-deformed sinh-Gordon equation analytically using the new general form of Kudryashov’s approach and numerically using the finite difference method. We develop a general form of the Kudryashov method that contains more than one constant that is used to give more explanations for the solutions that are obtained. The numerical results are also presented using the finite difference approach. We also provide numerous figures to demonstrate the various solitons propagation patterns. The proposed equation has opened up new options for describing physical systems that have lost their symmetry. The equation under study has not been studied extensively, so we completed the lesson that started a short time ago on it.
Profiling of carbonyl compounds in fresh cabbage with chemometric analysis for the development of freshness assessment method
Authors: Syukri Daimon , Rini  , Juanssilfero Ario Betha , Nakano Kohei
Published: March 2023

The aim of this study was to screen the distribution of carbonyl compounds (CCs) in fresh cabbage as a sample model of multi-layered leafy vegetables for discovering the universal freshness marker of fresh produces. The distribution of CCs was observed in the three outer leaf layers of the cabbage. The profile of CCs in each leaf will guide the selection of which leaf is the appropriate part to be used to further discover a freshness marker of cabbage during storage treatment at the postharvest stage. The carbonyl compounds in each leaf were extracted using a mixture of chloroform and methanol (2:1). The extracted CCs from samples were derivatized with dansyl hydrazine. A high-performance liquid chromatography-mass spectrometer with multiplexed multiple reactions monitoring (MRM) was used for the comprehensive detection of carbonyl compounds. More than 400 peaks were observed in the MRM chromatogram from all leaves. The distribution of m/z values that represent CCs were analyzed employing the principle component analysis-discriminant analysis by relating it to the leaf position. The distribution of CC was different for each leaf where the leaves of the second and third layers were similar and significantly different from the leaves of the first layer. The accumulation of trans-2-hexenal was dominant in the first layer; therefore, the utilization of the first layer is not suitable as the part of the sample to discover the freshness marker of multi-layered leafy vegetables.
Relationship between parental exposure to radiofrequency electromagnetic fields and primarily hematopoietic neoplasms (lymphoma, leukemia) and tumors in the central nervous system in children: a systematic review
Authors: Morales-Suárez-Varela María , Llopis-Morales Agustin , Doccioli Chiara , Donzelli Gabriele
Published: March 2023

Low-frequency electromagnetic fields have grown exponentially in recent years due to technological development and modernization. The World Health Organization (WHO)/International Agency for Research on Cancer (IARC) has classified radiofrequency electromagnetic fields (RF-EMFs) as possibly carcinogenic to humans (Group 2B), and recent studies have investigated the association between exposure to electromagnetic fields in parents and possible health effects in children, especially the development of tumours of the central nervous system (CNS). The objective of this systematic review was to collate all evidence on the relationship between parental occupational exposure to electromagnetic fields and the development of CNS cancer in children and to evaluate this association. This review was prepared according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed, Embase, and Web of Science were searched from January 1990 to April 2021. The search was conducted using the following search string: “occupational” AND “child” AND “electromagnetic” AND “cancer”. Seventeen articles met our inclusion criteria: 13 case-control studies, two cohort studies, and 2 meta-analyses. Most of the studies showed several methodological weaknesses that limited their results. Due to a lack of consistency regarding the outcome as well as the heterogeneity in the reviewed studies, the body of evidence for the effects of parental exposure to electromagnetic fields is not clear. Methodological heterogeneity in the way that studies were conducted could be responsible for the lack of consistency in the findings. Overall, the body of evidence allows no conclusion on the relationship between parental exposure to electromagnetic fields and the occurrence of CNS tumours in children.
RISING STARS: Targeting G protein-coupled receptors to regulate energy homeostasis
Authors: Jamaluddin Aqfan , Gorvin Caroline M
Published: March 2023

G protein-coupled receptors (GPCRs) have a critical role in energy homeostasis, contributing to food intake, energy expenditure and glycaemic control. Dysregulation of energy expenditure can lead to metabolic syndrome (abdominal obesity, elevated plasma triglyceride, LDL cholesterol and glucose, and high blood pressure), which is associated with an increased risk of developing obesity, diabetes mellitus, non-alcoholic fatty liver disease and cardiovascular complications. As the prevalence of these chronic diseases continues to rise worldwide, there is an increased need to understand the molecular mechanisms by which energy expenditure is regulated to facilitate the development of effective therapeutic strategies to treat and prevent these conditions. In recent years, drugs targeting GPCRs have been the focus of efforts to improve treatments for type-2 diabetes and obesity, with GLP-1R agonists a particular success. In this review, we focus on nine GPCRs with roles in energy homeostasis that are current and emerging targets to treat obesity and diabetes. We discuss findings from pre-clinical models and clinical trials of drugs targeting these receptors and challenges that must be overcome before these drugs can be routinely used in clinics. We also describe new insights into how these receptors signal, including how accessory proteins, biased signalling, and complex spatial signalling could provide unique opportunities to develop more efficacious therapies with fewer side effects. Finally, we describe how combined therapies, in which multiple GPCRs are targeted, may improve clinical outcomes and reduce off-target effects.
La investigación formativa en las Facultades de Arquitectura de la USTA: aproximación histórica a partir de los trabajos de grado modalidad investigación
Authors: Rueda Cáceres Liliana , Farrés Delgado Yasser , Cano Castro Ginna Paola , Abreu Plata Eneyda , Garcés Bravo Camilo Andrés , Gómez Arciniegas Carlos Humberto , Sanabria Salcedo Angélica Viviana
Published: March 2023

Toda formación tiene que ser sencillamente “investigativa”, la capacidad de asombro innata de los seres humanos se está perdiendo y debe ser recuperada, incluso, o sobre todo “para la comprensión, para el mundo de la vida cotidiana, para la construcción de la disposición al pensamiento crítico”, porque la investigación es realmente “una función inherente y fundamental del ser humano”
Assessments of Erianthus arundinaceus as a potential energy crop for bioethanol and biomethane production
Authors: Hu Yaodong , Zhang Lele , Hu Jinguang , Zhang Jianbo , Shen Fei , Yang Gang , Zhang Yanzong , Deng Shihuai , Qi Hui , Yan Jiajun , Bai Shiqie
Published: March 2023

Six varieties of Erianthus arundinaceus were assessed as potential energy crops and compared with switchgrass. Bioethanol and biomethane were produced as well. The chemical composition, elemental composition, and heating values were close to those of switchgrass except for a higher cellulose content. All varieties scored higher than 110, suggesting excellent potential as an energy crop. Pretreatment resulted in almost complete hydrolysis and achieved a higher glucose yield. In particular, E33 and E19 yielded 337.4 g and 332.4 g glucose, respectively, from 1.0 kg of feedstock compared with 312.1g/kg for switchgrass. E33, E49, and E19 exhibited a higher ethanol yield of 144.2 g/kg, 146.9 g/kg, and 149.6 g/kg feedstock, respectively, at a solids loading of 15%. No obvious influences could be observed on anaerobic digestion performances. A 16.3%, 14.6%, 14.0%, and 13.1% higher yield on cumulative methane could be obtained from E17, E23, E33, and E6, respectively, compared to switchgrass. Bioethanol and biomethane could be maximally obtained from E19 (6820 kg/ha) and E17 (3916 m3/ha), respectively. Thus, they are specially recommended for bioethanol and biomethane production, respectively. E33 can be suggested as a flexible variety for yielding relatively high bioethanol (6008 kg/ha) and biomethane (3409 m3/ha).
Thermal treatment’s effect on dust emission during sanding of meranti wood
Authors: Mikušová Lucia , Očkajová Alena , Dado Miroslav , Kučera Marián , Danihelová Zuzana
Published: March 2023

The aim of this research was to investigate the effects of various temperatures of thermal treatment of red meranti (Shorea accuminata) wood on mass concentration and size distribution of wood dust produced by a hand-held belt sander. The experiment was conducted during the sanding of the meranti wood in the natural state and using specimens that were heat-treated via the ThermoWood® technology at the temperatures of 160 °C, 180 °C, 200 °C, and 220 °C. An analysis of variance was used to measure the significance of the effects. Average values of the inhalable and respirable fractions of wood dust mass concentration determined via the optical and gravimetric method was highest at the treatment temperature of 160 °C. The results showed that mass concentration was not significantly influenced by thermal treatment.
Autohydrolysis, pulping, and bleaching of Eucalyptus urograndis in a biorefinery framework
Authors: Rodriguez Javier M. Loaiza , Colodette Jorge L. , García Juan C. , López Francisco
Published: March 2023

Autohydrolysis and kraft pulping were sequentially applied to Eucalyptus urograndis wood to obtain added-value products from hydrolysis liquor. A biorefinery approach was used to bleach the resulting solid phase containing the cellulose pulp with an optimized O–D–(EP)–D bleaching sequence, where O denotes delignification with the sequence D bleaching with chlorine dioxide and EP alkaline extraction with soda and hydrogen peroxide. The pulp was then beaten to obtain paper sheets. The two-stage process yielded pulp with a small Kappa number relative to conventional delignification (4.9 to 13.7 vs 17.1). Using autohydrolysis temperatures of 160 °C to 170 °C during 0 min to 15 min made the process selective towards the extraction of hemicelluloses (xylan up to 43.9%). Additionally, the Kappa number and brightness obtained after bleaching with an O-D-EP-D sequence were suitable for preparing dissolving grade pulp. The brightness of the pulp obtained was identical with that of the reference pulp (91.0%) and the Kappa number was smaller (0.2 to 0.6). Beating the pulp for 4500 PFI revolutions produced paper sheets with slightly better tensile strength and tear index than those for sheets from the reference pulp (viz., 90.3 N·m·g-1 and 9.9 mN·m²·g-1, respectively, versus 89.8 N·m·g-1 and 9.7 mN·m²·g-1, respectively).
Physico-mechanical and biodegradability study of Mimusops elengi seed shell powder filled PVOH films produced through membrane casting method
Authors: Tan Wuan Chien , Mathialagan Muniyadi , Ooi Zhong Xian
Published: March 2023

The development of biobased-plastic through natural filler addition into polymers has been the best method to resolve numerous environmental problems caused by overconsumption and the increasing waste disposal of non-degradable plastic films. This article produced biodegradable polyvinyl alcohol (PVOH) films by adding Mimusops elengi seed shell powder (MESSP) as a filler. The membrane casting method was used to develop the films instead of using the commercially studied solution casting method to avoid inconsistency in the thickness of the casted films. Increasing the MESSP loading enhanced the tensile modulus, resistance towards water absorption, and biodegradability of the PVOH/MESSP films. However, the tensile strength and elongation at break were reduced compared with the unfilled PVOH film. Fourier transform infrared (FTIR) analysis confirmed the reduction of intermolecular bonding between the MESSP and PVOH with increasing the MESSP loading, which is responsible for the reduction in tensile strength, deformability and water absorption of the films. After soil burial exposure, unfilled PVOH films experienced swelling due to water absorption, and there was no evidence of bio-degradation after 9 weeks of exposure. Meanwhile, the PVOH/ MESSP films were prone to microorganism activity and biodegradation can be seen as early as 3 weeks after exposure to soil.
Bacterial nanocellulose from symbiotic culture of bacteria and yeast kombucha prepared with lemongrass tea and sucrose: Optimization and characterization
Authors: Aditiawati Pingkan , Taufik Intan , Alexis Julio Jonathan Gilbert , Dungani Rudi
Published: March 2023

Bacterial nanocellulose (BNC) can be produced using a variety of substrates as fermentation medium for use in various biomaterial applications. This study aimed to optimize the production of and characterize the BNC derived from lemongrass leaves (L-BNC) obtained by symbiotic culture of bacteria and yeast (SCOBY) kombucha. The lemongrass leaves (10, 15, and 20 g/L) and sugar (30, 50, and 70 g/L) were incubated for 14 d at 30 °C. The optimal treatment was used to ferment kombucha for 21 days at 30 °C, with initial SCOBY inoculum of 3% w/v and kombucha of 10% v/v for the resulting L-BNC. The L-BNC was characterized using scanning electron microscopy-energy dispersive X-ray (SEM-EDX) spectroscopy, Fourier-transform Infrared spectroscopy (FT-IR), and X-ray diffraction analysis (XRD). The optimal parameters of the lemongrass kombucha fermentation production process were lemongrass content 10 g/L and sugar content 30 g/L with the incubation period of two weeks for 56.8 g/L of SCOBY production. The SEM analysis of L-BNC revealed a three-dimensional fibrous extremely fine network of randomly arranged nanofibrils with diameter of 163 ± 34 nm and hydrogen bonds present in L-BNC fibril units. Meanwhile, XRD results showed a crystallinity of 67.2%.
Evaluation of changes in fold cracking and mechanical properties of high-grammage paper based on pulp fiber modification
Authors: Kim Dong-Seop , Sung Yong Joo
Published: March 2023

The demand for high-grammage paper, 150 g/m2 or more, is increasing for product protection and aesthetic value. Fold cracking, resulting from high mechanical pressure during folding, considerably decreases the economic feasibility of such products for papermaking companies. Fold cracking can be reduced through creasing, but defects possibly occur as fiber bonds are broken. In this study, the fold cracking of high-grammage paper that was not treated through creasing was explored. The mechanical and folding properties of six types of pulp fibers were evaluated based on their beating degree. The fines content of the fiber differed according to the beating condition. Using pulp with low fines content improved the folding properties. The mechanical properties of hardwood pulp were enhanced with increased beating degree. The mechanical properties of softwood pulp were considerably increased, and fold cracking occurred with increasing beating degree. Therefore, to improve the fold cracking, beating should be applied appropriately, following the type and mixing ratio of pulp fibers. Finally, softwood pulp mixing is proposed as a strategy to control fold cracking while maintaining the unique characteristics of high-grammage paper.
Changes in fold cracking properties and mechanical properties of high-grammage paper as affected by additive and fillers
Authors: Kim Dong-Seop , Sung Yong Joo
Published: March 2023

Fold cracking, which reduces the economic feasibility of paper-making, is a localized surface deformation caused by extreme bending stress. Most paper products, such as base paper and coated paper, generate fold cracking during folding processing. To control fold cracking, the mechanical properties of the base paper can be strengthened, and the flexibility of the structure can be increased by controlling the modification in pulp fibers and stock preparation conditions. This study analyzed the changes in the mechanical properties of high-grammage paper in response to the addition of precipitated calcium carbonate (PCC) and cationic starch (C-starch). The application of inorganic filler (PCC) drastically reduced the internal bond strength and tensile strength, causing fold cracking, whereas C-starch increased the bond strength between fibers, which improved the tensile strength, internal bond strength, and elongation. However, when applied independently, fold cracking occurred because of extreme increase or decrease in strength. Therefore, the combined application of C-starch and PCC made it possible to form a paper-based structure with high fold cracking resistance. Moreover, when the fold cracking resistance was excellent, the mechanical properties were balanced without being biased in one direction even under conditions of relatively low mechanical properties.
Assessment of educators’ physical activity in conditions of social isolation
Authors: Kalynychenko Iryna , Cieslicka Miroslawa , Latina Hanna , Antomonov Mykhailo , Zaikina Hanna
Published: March 2023

Purpose: To assess the educators’ physical activity in the conditions of social isolation during the Covid-19 pandemic with the use of data on daily energy costs in the dynamics of 16 years.

Material &methods. To solve the problems, the data of 925 teachers of preschool and general secondary education institutions were analyzed (436 people – in 2005, 404 people – in 2018, 85 people – in 2021). Age composition of the participants of the scientific observation: I age group (I AG) up to 31 years old – 165 people (17.84 %), II age group (II AG) 31-40 years old – 271 people (29.30 %), III age group (III AG) 41-50 years old – 253 people (27.35 %), IV age group (IV AG) older than 50 years – 236 people (25.51 %). Among the teachers, 690 people (74.59 %) were residents of the regional center, 207 (22.38 %) were residents of district centers, and 28 (3.03 %) were residents of rural areas. The following methods were used during the study: questionnaire; natural experiment; statistical processing of the received data.

Results. The study revealed a tendency towards a decrease in the average values of teachers’ energy expenditure of daily physical activity from 2005 (2818.78±38.32 kcal) to 2021 (2804.03±20.77 (F2005-2021 =14.049; p=0.000)) and a natural decrease in the average value of the indicator of energy expenditure of daily physical activity during the distance learning (2412.34±21.08 kcal) by 13.96 % compared with the similar indicator during the traditional form of learning in 2021 (2804.03±20.77 kcal), (t offline - online =34.913; p=0.000).

Conclusions. In the dynamics of the studied period, there is a decrease in the average values of teachers’ energy expenditure of daily physical activity from 2005 (2818.78±38.32 kcal) to 2021 (2804.03±20.77 (F2005-2021 =14.049; p=0.000)).

The average value of the indicator of daily energy expenditure for physical activity during the distance learning (2412.34±21.08 kcal) is 13.96 % lower, compared with the similar indicator of teachers’ work using the traditional form of learning in 2021 (2804.03±20.77 kcal), (t offline - online =34,913; p=0,000).
Swallowing disorders and abnormal development in low risk term infants with gastroesophageal reflux
Authors: Alicia Correa-Ramírez , Esperanza Ontiveros-Mendoza , Mario Mandujano-Valdes , Miriam Figueroa-Olea , Bernardo Peña-Cruz , Maria Antonieta Mora-Tizcareno , Gabriela Romero-Esquilano , Francisco Javier Espinosa-Rosales , Carmen Sánchez-Perez
Published: March 2023

Introduction: A higher incidence of swallowing and developmental disorders has been reported in term infants with gastroesophageal reflux (GER) and no other apparent disorders when compared to healthy. No physiological explanation for this has been suggested and none of this evidence is considered when infants with GER are assessed. Brainstem is involved in deglutition and other automatism regulation especially early in life and has been proposed to participate, in a vertical-integrative hierarchical system, with higher nervous structures in the regulation of functional status, attention, and emotional reactivity. Objective: Report the follow-up during the first year of life of three term infants born under low risk conditions apparently healthy except for GER. Search for a relation between GER, swallowing disorders and development in which nervous system could be involved. Methods: Three infants born under low risk conditions and diagnosed with GER within the first three months of life were followed for a year. Radiological study of swallowing, and brainstem auditory-evoked potentials (BAEP) were performed at involvement and at six months of age. Patients where monthly assessed with Bayley II infant developmental scale and a neurological evaluation. Results: The three patients showed deglutition, development and self-regulation alterations that may not be explained by GER itself. Alterations on BAEP were reported. Conclusion: Further research should be done to establish if GER in infancy could be an early indicator of brainstem and neurological disorganization that could be associated to other complications that could be prevented with early intervention.
Healthy lifestyles for male masters athletes from frailty and lifestyle points of view
Authors: Bando Hiroshi , Konoike Kiyoshi , Takenaka Yuko
Published: March 2023

Authors and collaborators have investigated the subjective health and life satisfaction of elderly male Masters’ athletes. Subjects were 97 cases with 63.9 years in average, who participated in Masters track and field competition event, and they are asked to answer the questionnaire concerning healthy lifestyle habits. It had the inquiries about subjective health, satisfaction of daily life, spending leisure time and others. Two groups were categorized as non-elderly and elderly people (n=46/51), and compared for the detail such as frailty. As a result, no significant difference was found between two age groups for several aspects including daily lifestyle situation.
Antenatal genetic diagnostics in the context of genetic counselling: a medical, ethical and legal perspective in Europe
Authors: Emaldi Cirión Aitziber , Armaza Armaza Emilio José
Published: March 2023

Antenatal genetic diagnostics in the context of genetic counselling: a medical, ethical and legal perspective in Europe
Biocomposites composed of cartilage and natural rubber latex
Authors: Okamoto Yuki , Okamoto Masami
Published: March 2023

We have successfully fabricated the cartilage/natural rubber latex (NRL) biocomposites via human mesenchymal stem cells (hMSCs) spheroid under hypoxic condition. It was revealed that NRL nanoparticles acted as the main component, providing surface heterogeneity for the spheroids and resulting in a mechanically stable structure with a modulus two times higher compared to controls. The formation of the cartilage/NRL nanoparticles biocomposite results in having a stiff property was demonstrated. The gene expression levels of SRY-box 9 (SOX9), aggrecan and type II collagen (Col-II), and formation of glycosaminoglycan’s were higher in spheroids under hypoxic conditions, and administration of NRL nanoparticles enhanced chondrogenic differentiation is successfully induced. The promise of NRL nanoparticles for well-controlled chondrogenic differentiation and mechanically stable cartilage tissue was demonstrated.
Rare cycling-related shoulder fracture at pediatric age
Authors: Ramalho Joana , Ribeiro Silva Sara , Pinto Luísa , Oliveira Diana , Ribeiro André , Carvalho Adriano , Barroso Castro Helena
Published: March 2023

Introduction: Scapula Fractures are uncommon fractures to the shoulder girdle caused by high energy trauma and associated with pulmonary injury, head injury, and increased injury severity scores. They usually occur between 25-50 years of age. Diagnosis can be made with plain radiography and CT scan studies are helpful for fracture characterization and surgical planning. Treatment is usually conservative and thus early rehabilitation is essential. Case description: During a track cycling competition, a 14-year-old male participant falls. He was assessed by the medical team and evacuated to the nearby hospital for a suspected clavicle fracture. After evaluation and imaging investigation he was diagnosed with a scapular fracture. He was treated with immobilization for 4 weeks, with subsequent rehabilitation. Discussion: The present clinical case emphasizes the importance of correctly identifying a scapular fracture which may be associated with serious life-threatening conditions such as haemothorax or pneumothorax. A well systematised objective examination, early evacuation to hospital and effective imagiological examination as well as a prompt rehabilitation strategy are fundamental for therapeutic success.