bluuebunny/crossref_metadata_2025 huggingface dataset:
Factorial structure, reliability, and construct validity of the Generalized Anxiety Disorder 7-item (GAD-7): Evidence from Malaysia
Authors: Pheh Kai-Shuen , Tan Chee-Seng , Lee Kai Wei , Tay Kok-Wai , Ong Hooi Tin , Yap Sook Fan
Published: May 2023

Generalized anxiety disorder (GAD) is one of the most common mental disorders in Malaysia. Psychometrically sound measurements are urgently needed to assess anxiety symptoms. The extensively used Generalized Anxiety Disorder 7-item (GAD-7) is a promising candidate. However, studies on its factorial validity show mixed findings. While the one-factor solution has been replicated in different cultural contexts, some studies found different factorial structures instead. This study aimed to clarify the factorial validity of the English version of the GAD-7 in the Malaysian context. The responses collected from 1272 emerging to older adults in Malaysia were randomly divided into two halves and submitted to exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) respectively. Four acceptable models were explored in EFA ranging from unidimensional factor with 7 items to 3-factor models with 6 items. The four models revealed in EFA and the other competing models found in past studies were then examined and compared using CFA. The 6-item second-order model with a general factor of anxiety and three first-order factors with two items respectively (i.e., GAD-6) showed a more harmonic result and hence, is preferable. Moreover, the GAD-6 and its three subscales also showed satisfactory internal consistency and construct validity. This study uncovers a new and unique factorial structure of the GAD screening tool that fits in the Malaysian context. The scale may reveal GAD symptomatic dimensions that guide clinical interventions.
A minisatellite-based MLVA for deciphering the global epidemiology of the bacterial cassava pathogen Xanthomonas phaseoli pv. manihotis
Authors: Rache Leidy , Blondin Laurence , Diaz Tatis Paula , Flores Carolina , Camargo Andrea , Kante Moussa , Wonni Issa , López Camilo , Szurek Boris , Dupas Stephane , Pruvost Olivier , Koebnik Ralf , Restrepo Silvia , Bernal Adriana , Vernière Christian
Published: May 2023

Cassava Bacterial Blight (CBB) is a destructive disease widely distributed in the different areas where this crop is grown. Populations studies have been performed at local and national scales revealing a geographical genetic structure with temporal variations. A global epidemiology analysis of its causal agent Xanthomonas phaseoli pv. manihotis (Xpm) is needed to better understand the expansion of the disease for improving the monitoring of CBB. We targeted new tandem repeat (TR) loci with large repeat units, i.e. minisatellites, that we multiplexed in a scheme of Multi-Locus Variable number of TR Analysis (MLVA-8). This genotyping scheme separated 31 multilocus haplotypes in three clusters of single-locus variants and a singleton within a worldwide collection of 93 Xpm strains isolated over a period of fifty years. The major MLVA-8 cluster 1 grouped strains originating from all countries, except the unique Chinese strain. On the contrary, all the Xpm strains genotyped using the previously developed MLVA-14 microsatellite scheme were separated as unique haplotypes. We further propose an MLVA-12 scheme which takes advantage of combining TR loci with different mutation rates: the eight minisatellites and four faster evolving microsatellite markers, for global epidemiological surveillance. This MLVA-12 scheme identified 78 haplotypes and separated most of the strains in groups of double-locus variants (DLV) supporting some phylogenetic relationships. DLV groups were subdivided into closely related clusters of strains most often sharing the same geographical origin and isolated over a short period, supporting epidemiological relationships. The main MLVA-12 DLV group#1 was composed by strains from South America and all the African strains. The MLVA-12 scheme combining both minisatellite and microsatellite loci with different discriminatory power is expected to increase the accuracy of the phylogenetic signal and to minimize the homoplasy effects. Further investigation of the global epidemiology of Xpm will be helpful for a better control of CBB worldwide.
Optimization of electrical stimulation for the treatment of lower limb dysfunction after stroke: A systematic review and Bayesian network meta-analysis of randomized controlled trials
Authors: Fang Yu , Li Jiang , Liu Shanyu , Wang Yan , Li Jiaming , Yang Dongdong , Wang Qiaoling
Published: May 2023

Objective

To compare the treatment effect of five electrical stimulation methods commonly used in the treatment of stroke patients with lower limb dysfunction.

Methods

We implemented a systematic search of 3915 studies published up to January 2023 from eight databases and two clinical trial registries. First, two independent reviewers critically evaluated trial eligibility according to the inclusion and exclusion criteria. Next, they selected and extracted data. Then, they assessed the risk of bias. Pairwise meta-analysis and Bayesian network meta-analysis were conducted to estimate the effectiveness and ranking of the five electrical stimulation methods.

Results

A total of 33 trials with a final total of 2246 subjects were included in the analysis. By combining the comprehensive Rehabilitation Treatment (RT), the treatment effects of using five electrical stimulation methods were surperior to those of using RT only. In the meantime, RT+transcranial Direct Current Stimulation(tDCS) and RT+Functional Electrical Stimulation(FES) could be the optimal electric stimulation schemes for restoring lower limb motor function(SMD 8.35, 95%CI [3.05, 13.34]/ SMD 5.64, 95%CI [3.68, 7.56]), improving balance (SMD 9.80, 95%CI [0.67, 20.93]/ SMD 6.54, 95%CI [3.85, 10.95]) and activities of daily living(SMD 18.95, 95%CI [0.401, 36.9]/ SMD 15.47, 95%CI [7.89, 22.75]), and the treatment effects would be even better using RT+FES+tDCS combination.

Conclusion

tDCS and FES superior to other electrical stimulation methods based on RT in the treatment of lower limb dysfunction after stroke.
Causal speech enhancement using dynamical-weighted loss and attention encoder-decoder recurrent neural network
Authors: Peracha Fahad Khalil , Khattak Muhammad Irfan , Salem Nema , Saleem Nasir
Published: May 2023

Speech enhancement (SE) reduces background noise signals in target speech and is applied at the front end in various real-world applications, including robust ASRs and real-time processing in mobile phone communications. SE systems are commonly integrated into mobile phones to increase quality and intelligibility. As a result, a low-latency system is required to operate in real-world applications. On the other hand, these systems need efficient optimization. This research focuses on the single-microphone SE operating in real-time systems with better optimization. We propose a causal data-driven model that uses attention encoder-decoder long short-term memory (LSTM) to estimate the time-frequency mask from a noisy speech in order to make a clean speech for real-time applications that need low-latency causal processing. The encoder-decoder LSTM and a causal attention mechanism are used in the proposed model. Furthermore, a dynamical-weighted (DW) loss function is proposed to improve model learning by varying the weight loss values. Experiments demonstrated that the proposed model consistently improves voice quality, intelligibility, and noise suppression. In the causal processing mode, the LSTM-based estimated suppression time-frequency mask outperforms the baseline model for unseen noise types. The proposed SE improved the STOI by 2.64% (baseline LSTM-IRM), 6.6% (LSTM-KF), 4.18% (DeepXi-KF), and 3.58% (DeepResGRU-KF). In addition, we examine word error rates (WERs) using Google’s Automatic Speech Recognition (ASR). The ASR results show that error rates decreased from 46.33% (noisy signals) to 13.11% (proposed) 15.73% (LSTM), and 14.97% (LSTM-KF).
Expression of RNA polymerase I catalytic core is influenced by RPA12
Authors: Ford Brittany L. , Wei Ting , Liu Hester , Scull Catherine E. , Najmi Saman M. , Pitts Stephanie , Fan Wenjun , Schneider David A. , Laiho Marikki
Published: May 2023

RNA Polymerase I (Pol I) has recently been recognized as a cancer therapeutic target. The activity of this enzyme is essential for ribosome biogenesis and is universally activated in cancers. The enzymatic activity of this multi-subunit complex resides in its catalytic core composed of RPA194, RPA135, and RPA12, a subunit with functions in RNA cleavage, transcription initiation and elongation. Here we explore whether RPA12 influences the regulation of RPA194 in human cancer cells. We use a specific small-molecule Pol I inhibitor BMH-21 that inhibits transcription initiation, elongation and ultimately activates the degradation of Pol I catalytic subunit RPA194. We show that silencing RPA12 causes alterations in the expression and localization of Pol I subunits RPA194 and RPA135. Furthermore, we find that despite these alterations not only does the Pol I core complex between RPA194 and RPA135 remain intact upon RPA12 knockdown, but the transcription of Pol I and its engagement with chromatin remain unaffected. The BMH-21-mediated degradation of RPA194 was independent of RPA12 suggesting that RPA12 affects the basal expression, but not the drug-inducible turnover of RPA194. These studies add to knowledge defining regulatory factors for the expression of this Pol I catalytic subunit.
Experiences, barriers, and facilitators of health data use among performance monitoring teams (PMT) of health facilities in Eastern Ethiopia: A qualitative study
Authors: Abera Admas , Tolera Abebe , Tusa Biruk Shalmeno , Weldesenbet Adisu Birhanu , Tola Assefa , Shiferaw Tilahun , Girma Alemayehu , Mohammed Rania , Dessie Yadeta
Published: May 2023

Background

Routine health data is crucial in decision-making and improved health outcomes. Despite the significant investments in improving Ethiopia’s Performance Monitoring Team (PMT), there is limited evidence on the involvement, implementation strategies, and facilitators and barriers to data utilization by these teams responding to present and emerging health challenges. Therefore, this study aimed to explore the PMT experiences, facilitators, and barriers to information use in healthcare facilities in Eastern Ethiopia.

Method

This study employed a phenomenological study design using the Consolidated Framework for Implementation Research (CFIR) to identify the most relevant constructs, aiming to describe the data use approaches at six facilities in Dire Dawa and Harari regions in July 2021. Key informant interviews were conducted among 18 purposively selected experts using a semi-structured interview guide. Thematic coding analysis was applied using a partially deductive approach informed by previous studies and an inductive technique with the creation of new emerging themes. Data were analyzed thematically using ATLAS.ti.

Results

Study participants felt the primary function of PMT was improving health service delivery. This study also revealed that data quality, performance, service quality, and improvement strategies were among the major focus areas of the PMT. Data use by the PMT was affected by poor data quality, absence of accountability, and lack of recognition for outstanding performance. In addition, the engagement of PMT members on multiple committees negatively impacted data use leading to inadequate follow-up of PMT activities, weariness, and insufficient time to complete responsibilities.

Conclusion

Performance monitoring teams in the health facilities were established and functioning according to the national standard. However, barriers to operative data use included PMT engagement with multiple committees, poor data quality, lack of accountability, and poor documentation practices. Addressing the potential barriers by leveraging the PMT and existing structures have the potential to improve data use and health service performance.
Understanding barriers to tuberculosis diagnosis and treatment completion in a low-resource setting: A mixed-methods study in the Kingdom of Lesotho
Authors: Andom Afom T. , Gilbert Hannah N. , Ndayizigiye Melino , Mukherjee Joia S. , Lively Christina Thompson , Nthunya Jonase , Marole Tholoana A. , Ratsiu Makena , Smith Fawzi Mary C. , Yuen Courtney M.
Published: May 2023

Background

Lesotho is one of the 30 countries with the highest tuberculosis incidence rates in the world, estimated at 650 per 100,000 population. Tuberculosis case detection is extremely low, particularly with the rapid spread of COVID-19, dropping from an estimated 51% in 2020 to 33% in 2021. The aim of this study is to understand the barriers to tuberculosis diagnosis and treatment completion.

Methods

We used a convergent mixed methods study design. We collected data on the number of clients reporting symptoms upon tuberculosis screening, their sputum test results, the number of clients diagnosed, and the number of clients who started treatment from one district hospital and one health center in Berea district, Lesotho. We conducted in-depth interviews and focus group discussions with 53 health workers and patients. We used a content analysis approach to analyze qualitative data and integrated quantitative and qualitative findings in a joint display.

Findings

During March-August, 2019, 218 clients at the hospital and 292 clients at the health center reported tuberculosis symptoms. The full diagnostic testing process was completed for 66% of clients at the hospital and 68% at the health center. Among clients who initiated tuberculosis treatment, 68% (61/90) at the hospital and 74% (32/43) at the health center completed treatment. The main barriers to testing and treatment completion were challenges at sample collection, lack of decentralized diagnostic services, and socioeconomic factors such as food insecurity and high patient movement to search for jobs.

Conclusions

Tuberculosis diagnosis could be improved through the effective decentralization of laboratory services at the health facility level, and treatment completion could be improved by providing food and other forms of social support to patients.
‘Partners in education’: Primary educational publishers’ understanding of their role
Authors: Reid Grace , Mrva-Montoya Agata
Published: May 2023

The twenty-first century has seen the education ecosystem change drastically, with increased digitization of the classroom and more recently the global pandemic. These changes have been entwined with publishers’ own understanding of their role. Based on semi-structured interviews with ten industry professionals, this article aims to understand how primary educational publishers see their role and the future of the industry. The findings reveal a mission-driven sector operating in a complex environment, shaped by government policies and regulations, and the impact of technology, educational research, pedagogy and learning design. To support educators, publishers produce teaching resources and learning materials, interpret government regulation and curricula, research and develop expertise in learning design and pedagogical knowledge, research user and market needs, and provide professional development to educators. Despite these challenges and the impact of the COVID-19 pandemic, the interviewees believed that primary educational publishing would continue to expand, innovate and support the educators of Australia in the future by producing a combination of print and digital resources.
Artes Performativas e Intimidade
Authors: Silva José Eduardo , Louro Filomena , Porteiro Tiago Mora
Published: May 2023

A relação entre artes performativas e intimidade exprime-se em múltiplas e contraditórias valências, criando possibilidades heurísticas com profundas implicações sociopolíticas. A abertura da esfera íntima individual a outras esferas íntimas, configura um ato de partilha interpessoal que permite o privilégio da experiência de um outro ser humano naquilo que possui de mais profundo e singular. Mas, uma análise justa levará a reconhecer que, em determinadas circunstâncias, este espaço de intimidade também pode (e talvez deva) legitimamente manter-se vedado aos demais. É neste enquadramento que, por intermédio dos seus criadores, o teatro e as artes performativas têm vindo a desenvolver interessantes formas de lidar com problemáticas da esfera íntima no mundo contemporâneo. Sendo que o trabalho performativo conduz invariavelmente à investigação dos processos corporais, emocionais, mentais e relacionais da condição humana, esta edição pretende, através de uma abordagem interdisciplinar e intercultural, contribuir para o mapeamento do conceito de intimidade na sua relação com as artes performativas de forma plural, política e afetiva.
Automated identification and mapping of geological folds in cross sections
Authors: Huang Jian-Chu , Li An-Bo , Wang Xin , Shao Chang-Zheng , Shen Yan-Gen
Published: May 2023

Cross sections carry information on the spatial distribution of rock strata and the development of geological structures, and it is an important data source for three-dimensional (3D) geological modeling. However, the interpretation and mapping of geological structures in sections by means of manual interpretation are inefficient and costly, and the performance varies greatly with the experts’ ability and experience. The objective of this article is to develop an automatic recognition and mapping method for folds in cross sections. This method mainly includes identifying folds based on stratigraphic sequence characteristics (symmetrical and repetitive), classifying fold types based on geometric attributes of folds (interval scheduling, strike, and section morphology), optimizing strata based on the superposition principle and area conservation principle, and constructing the polygon features of folds. Based on experiments in the Parallel Fold Belt of Eastern Sichuan and the central Appalachian fold-thrust belt in the Appalachian Mountains, the method presented in this article can effectively be used for automatic recognition and high-quality mapping of folds in the cross sections. The method provides a good source of geological cross-sectional data for the 3D modeling of geologic bodies.
The crystal structure of 1-ethyl-2-nitro-imidazole oxide, C5H7N3O3
Authors: Jun Yuan , Bingheng Wu , Yong Wang , Jianlong Wang , Duanlin Cao , Lizhen Chen
Published: May 2023

C5H7N3O3, monoclinic, P21/n (no. 14), a = 8.7821(7) Å, b = 7.1320(5) Å, c = 11.6293(10) Å, β = 

104.718

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t

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(F) = 0.0468,

w

R

r
e
f

$w{R}_{ref}$

(F
2) = 0.1125, T = 170.0 K.
Tb2Co(B2O5)2 and Tb2Cu(B2O5)2 – two new borates with gadolinite-type structures
Authors: Teichtmeister Tobias A. , Hladik Michael M. , Heymann Gunter , Huppertz Hubert
Published: May 2023

Using high-pressure/high-temperature synthesis methods, it was possible to increase the number of known borates with a crystal structure derived from gadolinite. Syntheses of Tb2Co(B2O5)2 (8 GPa, 1000 °C) and Tb2Cu(B2O5)2 (11 GPa, 650 °C) were carried out in a Walker-type multianvil device. The crystal structures were determined by single-crystal X-ray diffraction methods and Rietveld refinements of the powder patterns. The new compounds were further characterized by their infrared spectra. The lanthanoid cobalt and copper borates Tb2Co(B2O5)2 and Tb2Cu(B2O5)2 crystallize in the monoclinic space group P21/c (no. 14) with the unit cell parameters a = 4.5630(1), b = 7.2991(2), c = 9.4161(2) Å, and β = 91.14(1)° for the cobalt and a = 4.5757(1), b = 7.3078(2), c = 9.3771(3) Å, β = 90.73(1)° for the copper compound.
Deviance Distraction and Stimulus-Specific Adaptation in the Somatosensory Cortex Reduce with Experience
Authors: Ghasemi Nejad Newsha , English Gwendolyn , Apostolelli Athina , Kopp Nicolas , Yanik Mehmet Fatih , von der Behrens Wolfger
Published: May 2023

Automatic detection of a surprising change in the sensory input is a central element of exogenous attentional control. Stimulus-specific adaptation (SSA) is a potential neuronal mechanism detecting such changes and has been robustly described across sensory modalities and different instances of the ascending sensory pathways. However, little is known about the relationship of SSA to perception. To assess how deviating stimuli influence target signal detection, we used a behavioral cross-modal paradigm in mice and combined it with extracellular recordings from the primary somatosensory whisker cortex. In this paradigm, male mice performed a visual detection task while task-irrelevant whisker stimuli were either presented as repetitive “standard” or as rare deviant stimuli. We found a deviance distraction effect on the animals' performance: Faster reaction times but worsened target detection was observed in the presence of a deviant stimulus. Multiunit activity and local field potentials exhibited enhanced neuronal responses to deviant compared with standard whisker stimuli across all cortical layers, as a result of SSA. The deviant-triggered behavioral distraction correlated with these enhanced neuronal deviant responses only in the deeper cortical layers. However, the layer-specific effect of SSA on perception reduced with increasing task experience as a result of statistical distractor learning. These results demonstrate a layer-specific involvement of SSA on perception that is susceptible to modulation over time.

SIGNIFICANCE STATEMENTDetecting sudden changes in our immediate environment is behaviorally relevant and important for efficient perceptual processing. However, the connection between the underpinnings of cortical deviance detection and perception remains unknown. Here, we investigate how the cortical representation of deviant whisker stimuli impacts visual target detection by recording local field potential and multiunit activity in the primary somatosensory cortex of mice engaged in a cross-modal visual detection task. We find that deviant whisker stimuli distract animals in their task performance, which correlates with enhanced neuronal responses for deviants in a layer-specific manner. Interestingly, this effect reduces with the increased experience of the animal as a result of distractor learning on statistical regularities.
Work Engagement dengan Intensi Turnover pada Karyawan
Authors: Cahyana Krisna Satya , Prahara Sowanya Ardi
Published: May 2023

Ketidaksanggupan suatu perusahaan untuk mempertahankan karyawan dapat berdampak pada tingginya tingkat intensi turnover pada karyawan yang pada akhirnya akan merugikan perusahaan. Karyawan dengan kualitas yang baik tetapi tidak didukung oleh perusahaan dengan memberikan masa depan yang baik, membuat karyawan keluar dari pekerjaanya. Tujuan penelitian ini untuk mengungkap keterkaitan work engagement dengan intensi turnover pada karyawan. Metode purposive sampling dipilih sebagai cara yang digunakan untuk mengambil subjek penelitian. Skala Work Engagement dan Skala Intensi Turnover digunakan untuk mengumpulkan data penelitian, selanjutnya dianalisis dengan menggunakan teknik korelasi product moment dari Karl Pearson. Hasil koefisien korelasi (rxy) antara variabel work engagement dan internsi turnover sebesar -0,328 (p0,005). Hipotesis dalam penelitian ini diterima, hal ini ditunjukkan dari hasil tersebut. Artinya work engagement dengan intensi turnover pada karyawan memiliki hubungan yang negatif.The inability of a company to retain employees can have an impact on the high level of turnover intention for employees which in turn will harm the company. Employees with good quality but not supported by the company by providing a good future, make employees quit their jobs. The purpose of this study was to reveal the relationship between work engagement and turnover intentions in employees. The purposive sampling method was chosen as the method used to take research subjects. The Work Engagement Scale and the Turnover Intention Scale were used to collect research data, then analyzed using Karl Pearson's product moment correlation technique. The result of the correlation coefficient (rxy) between work engagement and internal turnover variables is -0.328 (p 0.005). The hypothesis in this study is accepted, this is indicated by these results. This means that work engagement with employee turnover intentions has a negative relationship.
Geochemistry of Ruska Poliana granitoids of Korsun-Novomyrhorod pluton of Ukrainian Shield
Authors:   M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation, Kyiv,Ukraine, Zaiats Olha Viktorivna
Published: May 2023

The monograph presents the results of the study of rare-metal granitoids of the Ruska Poliana massif of the Korsun-Novomyrhorod pluton of the Ukrainian shield. The paper highlights the petrographic, mineralogical, petrochemical and geochemical features of the granitoids of the massif, as well as the content and distribution of rare and rare-earth elements in these rocks. Special attention is paid to the study of accessory mineralization of granites of the Ruska Poliana massif. According to the results of these studies, the main minerals-concentrators of rare elements of granites were identified. The Ruska Poliana granites and other rare-metal granites of the anorthosite-rapakivigranite group of the East European platform are compared. In terms of geochemical specialization, the Ruska Poliana granites are similar to the granites of the Kamiani Mohyly complex of the Azov megablock of the Ukrainian shield. On the basis of data on the isotopic composition of strontium in plagioclases and apatites from the Ruska Poliana granites, a conclusion was made about their crustal origin. The age of the granitoids of the Ruska Poliana massif was determined (1758 ± 3 million years), which corresponds to the time of formation of the rocks of the Korsun-Novomyrhorod pluton. The chemical composition of rock-forming and accessory minerals of granitoids of the massif was studied. The results of the work are used within the framework of the scientific topics of the M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation. The obtained results were put to practical use in conducting a geological survey of the M-36-XX area by the Northern State Regional Geological Enterprise “Northern Geology and compiling a set of state geological maps on a scale of 1:200,000. For a wide range of geological scientists. Research results can also be used by scientific and industrial organizations involved in the assessment of rare metal ore-bearing prospects of the Ukrainian shield and other regions.
STRATEGIES OF ECONOMIC STABILITY IN UNSTABLE ENVIRONMENT
Authors:   State Institution “Institute for Economics and Forecasting, NAS of Ukraine”, Grytsenko Andrii
Published: May 2023

The article deals with the problems raised in Sergio Mariotti's article on "A warning from the Russian-Ukrainian war: avoiding a future that rhymes with the past". The author supports the proposal for a broader view of the events and for the inclusion of a historical component in the analysis. At the same time, it is argued that a comparative historical analysis might be insufficient to solve such complex problems. The method of ascent from the abstract to the concrete is proposed, which allows considering systemic modern phenomena as a result of the entire previous historical development. On this basis, it is shown that the war in Ukraine is a concrete manifestation of the contradictions of globalization and localization, which historically originated from the jointly-divided labor and reached the apogee of their development in modern times. A hybrid "peace-war" system emerged and the process of changing the world order began based on the transition from industrial-market economy to information-network economy, which naturally increases uncertainties and contradictions. The policy of free trade and the policy of protectionism only are concrete manifestations of the contradictions of globalization and localization. It is shown that as a result of the aggravation of the contradictions of globalization and localization and their specific manifestations, objective tendencies to ensure the national rootedness of the sustainability of economic development arise. The generalization of such trends and their conscious use necessitates the formation of strategies of nationally rooted economic development, which will be relevant until the completion of a new technical and technological system and the formation of an information network based system of socio-economic relations. The article identifies the main features of the strategy of nationally rooted economic development relevant for the current conditions of Ukraine.
COMPARISON OF THE RESULTS OF SHORT-TERM FORECASTING OF ELECTRICITY IMBALANCES OF THE IPS OF UKRAINE USING AUTOREGRESSIVE MODELS AND ARTIFICIAL NEURAL NETWORKS
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine, Sychova V.V.
Published: May 2023

The article presents the results of the study of models for short-term forecasting of overall electricity imbalances in the IPS of Ukraine. The analysis of forecasting results obtained using different types of autoregressive models and two forecasting models based on artificial neural networks was performed. Conducted research based on actual data of the balancing market of electric energy of Ukraine showed the effectiveness of using artificial neural networks for the specified task. It is shown that the application of the LSTM (Long short-term memory) artificial neural network model achieves the highest forecasting accuracy for both positive and negative electricity imbalances, respectively, compared to forecasting using autoregressive models. Bibl. 11, fig. 3, table.
TUNING THE ANGULAR SPEED CONTROLLER OF THE REACTIVE FLYWHEEL OF THE NANOSATELLITE ORIENTATION SYSTEM
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine, Akinin K.P. , Kireyev V.G. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: May 2023

The paper describes reactive flywheels based on brushless magnetoelectric motors for controlling the spatial orientation of satellites, developed at the Institute of Electrodynamics of the National Academy of Sciences of Ukraine. The main attention is paid to the problem of implementing a rotor angular speed and position sensor, provided that it can be integrated into the motor design. The influence of the number of feedback signal pulses per one revolution of the motor shaft on the tuning of the reactive flywheel angular speed controller is studied under the condition that the ripple range at the controller output signal is limited at a given level. The dependences of the filter time constant and the controller gains on the value of the reactive flywheel angular speed and on the number of feedback signal pulses per revolution are obtained. Ref. 8, fig. 5, table.
ANALYTICAL CALCULATION OF MAGNETIC FLOWS AND LOSSES IN THE MAGNETIC SYSTEMS OF SHUNTING REACTORS BY SUBSTITUTE CIRCUITS
Authors:   PrJSC «ZTR»,  Dniprovske shose, 3, Zaporizhia, 69600, Ukraine, Basova А.V. , Ivankov V.F. ,   PrJSC «ZTR»,  Dniprovske shose, 3, Zaporizhia, 69600, Ukraine
Published: May 2023

For high-voltage shunt reactors with rods with non-magnetic gaps, an analytical method for calculating magnetic fluxes based on substitute circuits has been developed by substantiation by finite element modeling, and the calculation of main and additional losses in magnetic systems has been refined. The results of loss calculations are compared with their estimates during type tests of reactors. Bibl. 11, fig. 8, table.
A Theoretical Estimation of Optical, Vibrational and Structural Properties of II–VI Quaternary Alloy Zn0.5Cd0.5SySe1–y
Authors: Jhakal R.K. , Sharma M.D. , Paliwal U.
Published: May 2023

We present a theoretical estimation of optical, vibrational, and structural properties of II–VI semiconducting quaternary alloy Zn0.5Cd0.5SySe1−y for 0 < y < 1 giving total 10 compositions. The estimation of refractive index, elastic constants, bulk modulus, and vibrational frequencies are performed using the important input parameters provided by the empirical pseudopotential method. In this method, the bandgaps are computed, and the alloying effects are modeled through the modified virtual crystal approximation. We have computed the static refractive index, static and high-frequency dielectric constants, longitudinal and transverse optical phonon frequencies, elastic constants, bulk modulus, and cohesive energy for 10 compositions of the alloy. The results are compared to other experimental and theoretical values wherever available.
Development of Technology for Obtaining Nanosized Heterostructured Films by Ion-Plasma Deposition
Authors: Normuradov M.T. , Khozhiev Sh.T. , Dovranov K.T. , Davranov Kh.T. , Davlatov M.A. , Khollokov F.K.
Published: May 2023

The study of films containing narrow-gap semiconductors is a very promising field related to the production of thermal sensors. In this work, we consider the possibility of obtaining the film coatings from silicides of Ba, Na, Ni, Co, Pd, Mn, and P and BaTiO3 using ionplasma methods. The production of film coatings from metal silicides and BaTiO3 on the surface of crystalline silicon and mica and their electronic and X-ray structural characteristics are studied. The dependence of the properties of film coatings on the conditions of the film deposition is determined.
Інформаційно-аналітичне забезпечення державних механізмів запобігання та врегулювання міжнаціональних конфліктів
Authors: Запорожець Тетяна , Савченко Наталія
Published: May 2023

Мета дослідження полягає у визначенні  основних  аспектів  і  напрямів інформаційно-аналітичного забезпечення державних механізмів запобігання та врегулювання міжнаціональних конфліктів. Окреслено наукові підходи до проблеми прогнозування міжнаціональних конфліктів на основі аналітики та інформаційних даних. Обґрунтовано історичні основи розвитку державної політики управління суспільними процесами, пошуку і застосування ефективних методів запобігання кризам та конфліктам такого характеру. Доведено, що ефективність функціонування державних механізмів запобігання та врегулювання міжнаціональних конфліктів безпосередньо залежить від сукупності взаємодіючих інформаційних підсистем, розроблених єдиних підходів і методології прийняття управлінських рішень з досліджуваних питань. Встановлено, що система інформаційного та аналітичного забезпечення повинна враховувати неоднорідність процесу прийняття управлінських рішень та специфіку роботи посадових осіб на різних етапах їх прийняття. У зв’язку із цим запропоновано низку взаємодіючих підсистем з відповідними функціями та характеристиками, як-то: “інформаційно-комунікаційне середовище”, “моніторинг проблемних ситуацій”, “інформаційно-документальне обслуговування”, “ситуаційний  і  системний аналіз”, “підтримка процесів підготовки та прийняття управлінських рішень”, “забезпечення необхідного рівня кінцевих показників діяльності”. Доведено, що запобігання виникненню міжнаціональних конфліктів, а в ідеалі – усунення ймовірних негативних явищ на етнонаціональному ґрунті є одним з нагальних державотворчих завдань. Його вирішення вимагає копіткого вивчення та аналізу етнонаціональної ситуації в регіонах, теоретичного обґрунтування дій органів державної влади у цій сфері, вироблення концептуальних підходів, інформаційно-аналітичного супроводу прийняття державно-управлінських рішень, інноваційних технологій регулятивного впливу держави на процеси етноконфліктного характеру.
Цифрові платформи Smart Specialisation Platform та Espon: структура та можливості для регіонів і громад ЄС
Authors: Маматова Тетяна , Чикаренко Ірина , Бородін Євгеній
Published: May 2023

Мета – вивчити структуру цифрових платформ Smart Specialisation Platform (S3P) та ESPON, а також можливості, які ними пропонуються для регіонів і громад ЄС, задля окреслення напрямів подальших наукових прикладних досліджень та розроблення обов’язкових та вибіркових освітніх компонент освітньо-професійних програм галузі знань 28 «Публічне управління та адміністрування».

Актуальність. Смарт-спеціалізація розглядається як один із методологічних інструментів наближення якості стратегічного планування до стандартів ЄС та збільшення спроможності регіонів України отримувати доступ до фінансування програм і проєктів розвитку через залучення коштів структурних фондів ЄС. Набуття Україною у 2022 році статусу країни-кандидата до вступу до ЄС зумовлює виникнення нових можливостей і викликів у цій сфері, які потребують науково-обґрунтованого розв’язання, а також розвинення у практиків місцевого самоврядування специфічних складових професійної компетентності, зокрема навичок смарт-спеціалізації.

Результати. Вивчення тематичної структури S3P дозволяє схарактеризувати її як потужний портал управління знаннями у сфері регіональної смарт-спеціалізації, який надає доступ до оглядів успішних практик, створює основу для розбудови партнерств, пропонує різноманітні аналітичні інструменти. Будь які області України за умов належної комунікації із модераторами платформи і підготовки пакету документів можуть приєднатися до S3P. Цифрова платформа ESPON надає, зокрема, можливість: проведення досліджень із територіальним фокусуванням з метою адаптації до специфіки та потреб мешканців і територій; громадянам/політикам зрозуміти, як їхня громада чи територія працює у порівнянні з іншими європейськими регіонами; отримати актуальну інформацію та аналітику на теми, які є пріоритетними на європейському порядку денному. 

Висновки. Актуалізується завдання підготовки висококваліфікованих та вмотивованих фахівців з розвиненими навичками смарт-спеціалізації, здатних розробляти та впроваджувати регіональні стратегії смарт-спеціалізації та стратегій розвитку територіальних громад на основі вивчення провідного досвіду та кращих ЄС із використанням потенціалу платформ S3P та ESPON.
Composição química e atividade antibacteriana do óleo essencial dos frutos da Pimenta dioica
Authors: Barros Gomes Paulo Roberto , Diniz Ribeiro Joelkson , Guimarães da Costa Myrcéia Carolyne , Da Silva Castro Marcelo Werneck , Buzar Neto Nagib , Vasconcelos Melo Andréa , Oliveira Everton Gustavo , Costa Louzeiro Hilton , Fontenele Maria Alves , Souza de Lima Helson , Fonseca Silva Eduardo , de Paula Maria do Livramento , Mouchrek Filho Victor Elias , Nascimento Mouchrek Adenilde
Published: May 2023

Neste estudo descrevemos a extração, composição química e a atividade antibacteriana do óleo essencial extraído dos frutos da Pimenta dioica. Para isso, extraímos o óleo por hidrodestilação; identificamos os compostos por cromatografia gasosa acoplada ao espectrômetro de massa (CG/EM); quantificamos o componente majoritário por espectrometria UV vis e voltametria; e determinamos a atividade antibacteriana contra Escherichia coli, Staphylococcus aureus, Proteus mirabilis, Pseudomonas aeruginosa e Serratia odorifera pelo método de difusão em disco. Os resultados mostraram que o óleo é composto em sua maioria por eugenol e sua quantidade está em, aproximadamente, 78,15%, cuja classe predominante foi a dos monoterpenos. Além disso, as bactérias testadas com o óleo essencial apresentaram halos de inibição, variando de 11 a 21 mm. Portanto, o óleo é um potencial agente antibacteriano.
Principales enfermedades según el grupo sanguíneo en población mayor de 60 años en provincia de Cuenca (España)
Authors: Batanero-Hernán Ma. Carmen , Escalera Izquierdo Begoña , Fresno Contreras María José , Rodríguez-Chamorro Miguel Angel
Published: May 2023

Objetivo: conocer la prevalencia de enfermedades según el grupo sanguíneo de la población estudiada en la provincia de Cuenca (España). Métodos: estudio observacional, descriptivo, corte transversal y base poblacional. La muestra de 73 personas (39 varones, 34 mujeres), mayores de 60 años. Se identificaron todos los grupos sanguíneos, estudiándolos por edad y género. Resultados: los porcentajes de grupos sanguíneos de la población estudiada por género son 42,6% (grupo A); 42,4% (O); 13% (B) y 1,4% (AB). Predomina el A+ (35,6%), seguido del O+ (27,4%). Se estudia la prevalencia de una determinada enfermedad en función del grupo sanguíneo. En este sentido, se detectan diferencias dentro de un mismo grupo, según el fator Rh. Los grupos Rh positivos padecen más de HTA, insomnio y depresión que los Rh negativos. Los grupos A y O padecen mayor aumento de colesterol que los del grupo B. Los del grupo O tienen más HTA que el resto y el O+ padece mayor porcentaje de anemia (Fe), mientras que los A+ anemia (B12). La osteoporosis es mayor en los grupos negativos que en los positivos, salvo en el grupo AB+. Conclusiones: el grupo sanguíneo con el que nacemos puede condicionar las enfermedades que padeceremos a lo largo de nuestra vida. El ser 0 podría predisponerlos a tener HTA, anemia (Fe), colesterol, enfermedades pulmonares e insomnio, mientras que el A depresión, anemia (B12) y problemas de próstata en varones.
Síntesis en fase sólida de un neuropéptido cosmecéutico y su microencapsulación en un sistema liposomal
Authors: Sandoval A J. Andrés , Rosas P. Jaiver E.
Published: May 2023

Introducción: actualmente los péptidos sintéticos se han constituido en una novedosa alternativa para el tratamiento de la piel envejecida. Acetilhexapéptido-3 (Ac-EEMQRR-NH2) ha sido utilizado para inducir reducción de líneas de expresión de manera análoga a la toxina botulínica, pero sin efectos tóxicos. Objetivo: sintetizar el acetilhexapéptido-3 y desarrollar un sistema liposomal para su encapsulación y favorecer su paso a través de una membrana modelo. Metodología: el péptido fue obtenido mediante síntesis en fase sólida (SFS) empleando la estrategia Fmoc/tBu, fue purificado y plenamente caracterizado. El sistema liposomal con acetilhexapéptido-3 encapsulado fue desarrollado mediante la formación de una emulsión con posterior inversión de fase por evaporación del solvente orgánico. Los sistemas fueron caracterizados en su tamaño, potencial zeta, eficiencia de encapsulación del neuropéptido y de manera preliminar se realizó un estudio de permeabilidad ex vivo. Resultados: es posible sintetizar péptidos cortos con alto grado de pureza y buen rendimiento, utilizando la metodología de SFS Fmoc/tBu. De acuerdo con la caracterización, el sistema liposomal adelantado sugiere una buena estrategia para la encapsulación del acetilhexapéptido-3 y su potencial aplicación en el desarrollo un novedoso producto cosmecéutico.
Chemical constituents, larvicidal activity and molluscicidal from fresh leaves of Alpinia zerumbet (Pers.) and Cymbopogon citratus (DC.) Stapf
Authors: Victor Serra Rosa Paulo , Santos Júnior Paulo Sérgio , Pereira de Sousa Irlane Thais , Santos da Silva Igor , dos Santos Farias Wilma Karlla , Dos Santos Souza Laurilene , Fonseca Danielly , de Araújo Neto Ari Pereira , Oliveira Everton Gustavo
Published: May 2023

Introduction: This study evaluated the chemical characterization, larvicidal activity and molluscicidal activity in front of the snail transmitting schistosomes (Biomphalaria glabrata) of the essential oils of Alpinia zerumbet and Cymbopogon citratus (DC.) Stapf. The essential oils (EOs) were extracted by hydrodistillation, with chemical characterization through Gas Chromatography coupled to mass spectrometry (GC-MS). The physical-chemical parameters were determined according to the Brazilian Pharmacopoeia. The toxicity test followed the bioassay with Artemia salina Leach, the EOs approved in this assay followed to evaluate their biological properties. Methodology: for molluscicidal activity, the methodology recommended by the WHO was performed, and the LC50 of the EOs was performed for their action in the face of the snail obtained by the Reed&Muench method. Both EOs showed low toxicity, and thus were evaluated for the biological properties larvicidal and molluscicidal .Alpinia zerumbet EO showed molluscicidal activity with LC50 of 40.63 mg·L-1 and Cymbopogon citratus EO 33.94 mg·L-1. Results: Both EOs showed larvicidal and molluscicidal potentials against the organisms tested, showing satisfactory results for their action. The results indicate that the evaluated EOs are composed of substances that promote and encourage their application due to their potential for molluscicidal and larvicidal biological activity.
New records of semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from the Caatinga biome, Brazil
Authors: Mourão dos Santos Rodrigues Juliana , Moreira Felipe Ferraz Figueiredo
Published: May 2023

Semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) are small to mid-sized insects, currently represented by more than 2,100 known species distributed on all continents, except for Antarctica. So far, 244 species have been recorded from Brazil, but only 63 from the Northeast Region of the country. The relatively small number of species in this region is related to the virtual lack of knowledge on the fauna of the Caatinga, a biome that is distributed essentially throughout this region. We present here new records for 28 species based on material collected in four Federal Conservation Units of the Caatinga biome: Aiuaba Ecological Station (Ceará state), Chapada Diamantina National Park (Bahia state), Catimbau National Park (Pernambuco state), and Serra das Confusões National Park (Piauí state). Moreover, several species are recorded for the first time from at least one of these states: 11 from Bahia, ten from Ceará, two from Pernambuco, and eight from Piauí.
EXTENSÃO UNIVERSITÁRIA E DIREITOS HUMANOS
Authors: Silva Clemildo Anacleto da
Published: May 2023

Este texto tem como propósito apresentar o programa de extensão da Rede Metodista – denominado Educação, Direitos Humanos e Cidadania – a datar da nova política de extensão universitária, contida na Resolução nº 7, de 18 de dezembro de 2018. Nesse sentido, o artigo preocupa-se em mostrar os principais itens a serem considerados na elaboração dos projetos de extensão. Para tanto, aborda o conceito de direitos humanos, evidencia os principais tópicos das diretrizes nacionais para educação em direitos humanos e indica como um projeto de extensão universitária deve ser elaborado, a partir do programa de extensão: educação, direitos humanos e cidadania.
Modal analysis under jittering and kernel clock distribution: single-output identification
Authors: Ramadan Wasim , Ozer Ekin
Published: May 2023

Smartphones have attracted attention in the structural health monitoring community due to their embedded multisensory platforms suitable for crowdsourcing innovation. Despite their advantages, smartphone sensors are originally designed for user utility rather than technical engineering applications (e.g. vibration analysis and modal identification). Sampling jitter is among those problems adversely influencing smartphone performance as a scientific device that can be used for characterising civil infrastructure dynamic characteristics. With inconsistencies in the sampling period due to jitter effects, the identified modal frequencies of a structure can deviate from the actual value, which is artificially introduced by smartphone clock errors. In this study, the authors formulate the statistical characteristics of the smartphone sampling period through kernel distribution and apply a digital reconstruction remedy to the sampling jitter problem. Through introductory simulations of a sine wave and physical implementations through shaking table tests equipped with smartphones, the efficiency of kernel distribution diagnosis and the signal-reconstruction remedy is presented. Following the simulation and laboratory applications, the proposed techniques are applied to vibration monitoring of a steel pedestrian bridge in terms of the auto power spectral density and short-time Fourier transform of single-output signals. The results show successful rehabilitation of accelerometer data from smartphones, removing jitter-induced errors to a significant extent and accordingly improving the identification accuracy currently in a single-output setting.