bluuebunny/crossref_metadata_2025_split huggingface dataset:
Near-Resonant Regimes of a Moving Load on a Pre-Stressed Incompressible Elastic Half-Space
Authors: Kudaibergenov Askar , Kudaibergenov Askat , Prikazchikov Danila 
Published: July 2021

Abstract
The article is concerned with the analysis of the problem for a concentrated line load moving at a constant speed along the surface of a pre-stressed, incompressible, isotropic elastic half-space, within the framework of the plane-strain assumption. The focus is on the near-critical regimes, when the speed of the load is close to that of the surface wave. Both steady-state and transient regimes are considered. Implementation of the hyperbolic–elliptic asymptotic formulation for the surface wave field allows explicit approximate solution for displacement components expressed in terms of the elementary functions, highlighting the resonant nature of the surface wave. Numerical illustrations of the solutions are presented for several material models.
Certain partitions on a set and their applications to different classes of graded algebras
Authors: Calderón Martín Antonio J. , Dieme Boubacar 
Published: July 2021

Abstract
Let (𝔘, ɛu
) and (𝔅, ɛb
) be two pointed sets. Given a family of three maps ℱ = {f
1 : 𝔘 → 𝔘; f
2 : 𝔘 × 𝔘 → 𝔘; f
3 : 𝔘 × 𝔘 → 𝔅}, this family provides an adequate decomposition of 𝔘 \ {ɛu
} as the orthogonal disjoint union of well-described ℱ-invariant subsets. This decomposition is applied to the structure theory of graded involutive algebras, graded quadratic algebras and graded weak H
*-algebras.
Simulation of the optical erbium doped fiber amplification for performance analysis
Authors: Róka Rastislav 
Published: July 2021

Abstract
In this contribution, innovations in the simulation of the optical transmission path are presented specifically, the dynamic performance analysis of erbium doped fiber amplifier (EDFA) properties for system applications is focused. Our EDFA simulation model is based on population equations of ions that can describe mutual relations between three states of ions in the EDFA amplifier. The presented numerical approach includes a signal gain and noise contributions to the single input channel amplification using the steady state modelling coming out of a dynamic model. The EDFA model in the steady state can be consequently applied for a purpose of advanced si mulations performed in the complete optical transmission path.
Blind audio source separation based on a new system model and the Savitzky-Golay filter
Authors: Xu Pengfei , Jia Yinjie , Jiang Mingxin 
Published: July 2021

Abstract
Blind source separation (BSS) is a research hotspot in the field of signal processing. This scheme is widely applied to separate a group of source signals from a given set of observations or mixed signals. In the present study, the Savitzky-Golay filter is applied to smooth the mixed signals, adopt a simplified cost function based on the signal to noise ratio (SNR) and obtain the demixing matrix accordingly. To this end, the generalized eigenvalue problem is solved without conventional iterative methods. It is founded that the proposed algorithm has a simple structure and can be easily implemented in diverse problems. The obtained results demonstrate the good performance of the proposed model for separating audio signals in cases with high signal to noise ratios.
General population perceptions of risk in the Covid-19 pandemic: A Romanian case study
Authors: Popescu Liliana , Vîlcea Cristiana 
Published: July 2021

Abstract
The COVID-19 pandemic has created complex socio-political situations, as the health crisis was paralleled by the reshaping of lifestyle patterns and induced severe economic changes. By means of an online survey, this study aims to investigate the population perceptions of risk in Romania: it examines important psychological and social factors related to risk perception and behaviours, as well as attitudes toward quarantine and physical distancing. By means of statistical analysis, the data were analysed and a GIS environment was used to visualise data distributions. Our findings indicate that if the perceived risk associated to the epidemic is high, people will change their normal behaviours, adopt preventative measures, adhere to strict hygiene practices and are willing to self-isolate for the benefit of their peers, which they tend to see as running a greater risk than themselves. Women and people with higher educational status tend to be more worried about the current situation, but regarding the severity, almost all men believe they would risk a severe state if infected. In conclusion, the perception of high risk associated with COVID-19 can lead not only to positive behavioural changes (mainly physical distancing and improved hygiene), but also to a rapid mobilisation and active involvement of communities, which are vital for stopping transmission of the virus.
Suburbanisation processes within and outside the city: The development of intra-urban suburbs in Wrocław, Poland
Authors: Szmytkie Robert 
Published: July 2021

Abstract
The scale and the specificity of intra-urban suburbanisation is subject to evaluation in this article, based on a case study of Wrocław city (SW Poland), using data on population changes at an intra-urban scale and on the level of construction activity in the city. Intra-urban suburbanisation is characterised by intensive construction activity and population growth in the peripheral districts of the city, while depopulation takes place in the central part of the city and in large panel block estates from the socialist period. The main factors for the development of intra-urban suburbanisation are a reaction to the unfavourable (from the perspective of the city) suburbanisation processes (outflow of residents and tax revenue, road traffic congestion and the necessity to service populations residing de facto outside the city). The existence of extensive non-urbanised areas within the larger cities of Central and Eastern Europe (identified as potential areas for investment) results from the specific nature of their territorial development in the 20th century, including incorporation processes connected with planned urbanisation.
Monitoring and Forecasting of Surface Deformation at Victoria and Cantacuzino Mines
Authors: Onica Ilie , Marian Dacian-Paul , Marina Ovidiu 
Published: July 2021

Abstract
The underground mining of the rock salt deposit from Slănic started in 1665, with the Old Mines and continued in 1970, with Victoria Mine, then in 1993, with Cantacuzino Mine. The mining method applied at Victoria and Cantacuzino mines was the one with small rooms and square pillars, with which over 9.7 million m3 of rock salt were extracted. This very large volume of underground mining voids led to the convergence of the underground excavations and thus to the deformation of the surface. This article presents the analysis of the measurements of surface displacement and the prediction of its subsidence over time. Also, the main factors that contributed to the deformation of the surface are analyzed, namely: the dimensions of the underground voids, the mining depth, the geomechanical characteristics, the tectonics and microtectonics of the deposit, the hydrogeology and the effect of blasting.
Environmental Impact Assessment Related by Energy Sector in Rovinari Mining Area
Authors: Gurică Crina-Adriana , Georgescu Mircea 
Published: July 2021

Abstract
In this article an impact assessment is carried out, generated by activities in the energy sector related to Rovinari mining area. Energy-related activities in this area are carried out by open pit mining activities in the context of Tismana, Roșia, Pinoasa, Peşteana and Rovinari locations and Rovinari thermal power plant. Some information that has formed the input for the author’s approach has been provided by SC. Complexul Energetic Oltenia SA (CEO) and S.C. Institute of Scientific Research, Technological Engineering and Mine Designs on Lignite S.A. Craiova (ICSITPML) which has been processed, analysed and used for the presented environmental impact assessment. Two methods from specialized studies have been used for the impact assessment, namely: the Matrix Method for Rapid Impact Assessment (MERI) and the Method for Integrated Quantitative Impact and Risk Assessment of Environmental Pollution (EIRM). Based on the analysis carried out, it can be concluded that the activity in this sector does not lead to significant negative effects strictly associated with it.
The Impact of Exploiting Lignite in Lupoaia Open Pit on Environmental Water
Authors: Iladie Corina Maria 
Published: July 2021

Abstract
The impact of extracting lignite in Lupoaia open pit over waters is local and regional, and temporary. The hydrographic network in Lupoaia open pit depends on River Motru, with its afluents, Ploștina and Lupoița Valley Rivers. The aquifers are to be found in the coal layers V-XII, mainly of sands formation. The impact over water in Lupoaia consists of water pollution and of changes in both the quality and the quantity of ground and surface waters. The surface waters are polluted resulting in industrial wastewaters, household wastewaters and waste rainwater. The wastewater is polluted within maximum admitted limits. The quality of groundwaters is influenced and modified by extracting coal resulting in the extinction of some aquifers. Environmental risks that can occur when extracting lignite are water floods, landslides, disasters which can be prevented by building guard channels around the open pit. The actions for reducing the impact are, in general, accomplished through monitoring both the water pollutants and the morphological changes caused by extracting lignite. That is why wastewater treatment plants must function. The impact of the activity in Lupoaia open pit over the hydrographic net of the area is to be observed during the entire extracting period, and monitoring this activity is highly demanded by the European environmental protection laws.
The Share Distribution and Precision Evaluation in Underground Topographic Routes and Networks
Authors: Filip Larisa Ofelia , Cucăilă Simona 
Published: July 2021

Abstract
The underground topographic works of elevating and drawing are necessary for the execution of underground works (mining, hydrotechnics, communications, etc.) Fulfilling these works efficiently and safely requires an advance study for the precisions in topographic support routes and networks. This paper aims to establish the share distribution correlated with the underground works distribution.
Investigation of the effects on ink colour of lacquer coating applied to the printed substrate in the electrophotographic printing system
Authors: Sönmez Sinan , Arslan Serra 
Published: July 2021

Abstract
In this study, the effects of the lacquer applied to the printing materials which were printed by electrophotographic printing method on printing quality were investigated. In practice, printing materials with the same weight and different optical properties were used and the study was carried out in three stages. The optical and physical properties of the printing materials used in the first part were determined, in the second part, the printing of these materials by electrophotographic printing method and printability tests were performed. In the third chapter, matte and glossy lacquers were applied to these printed materials and printability tests were repeated. As a result of the study, it was observed that the application of gloss and matte lacquer caused a decrease in the printing density values and also the application of matte lacquer caused a decrease in the gloss values.
Fe-modified activated carbon obtained from biomass as a catalyst for α-pinene autoxidation
Authors: Kamińska Adrianna , Maciejewska Nikola , Miądlicki Piotr , Kiełbasa Karolina , Sreńscek-Nazzal Joanna , Michalkiewicz Beata 
Published: July 2021

Abstract
The presented work describes the autoxidation of alpha-pinene for the first time using a catalyst based on activated carbon from biomass with introduced Fe. The raw material for the preparation of the carbon material was waste orange peel, which was activated with a KOH solution. The following instrumental methods characterized the obtained catalyst (Fe/O_AC):N2 adsorption at 77 K, XRD, UV, SEM, TEM, X-ray microanalysis, and catalytic studies. It was shown that the Fe/O_AC catalyst was very active in the autoxidation of alpha-pinene. The main reaction products were: alpha-pinene oxide, verbenone, verbenol, and campholenic aldehyde.
Physical Activity and Parameters of Body Posture in the Frontal Plane in Children
Authors: Labecka Marta Kinga 
Published: July 2021

Abstract

Introduction
Physical activity may have an impact on the parameters of body posture. Scientific reports suggest that levels of physical activity are declining among society, which may result in incorrect changes in body posture. This study aimed to assess the relationship between physical activity and the parameters characterizing posture in the frontal plane in children.

Material and Methods
Sixty-seven primary school students aged 9 were enrolled in the study, including 29 girls and 38 boys. The posture was evaluated with the photogrammetric method. Also, anthropometric measures and the level of physical activity were investigated.

Results
The highest percentage of examined children was characterized by a moderate level of physical activity. Children with a high level of physical activity were characterized by the greater asymmetry of position between the right and left shoulder as compared to those with a low and a moderate level of physical activity.

Conclusions
There were statistically significant differences only in the height of shoulders in children with a high level of physical activity. This study should be repeated in adolescence, characterized by changes in development and a reluctance to physical activity.
Directions for Ensuring the Equivalence of Exchange in Agri-Food Chains in Ukraine
Authors: Varchenko Olha.O. 
Published: July 2021

Abstract
The article examines the issues of intersectoral price relations in agri-food chains in Ukraine. It is proved that the imbalance of relations between different spheres of the agro-industrial complex due to price disparity causes the withdrawal of financial resources from one industry to another, without creating conditions for expanded reproduction. The factors influencing prices in agri-food chains are systematized: inflation, disparity, currency fluctuations, sales channels, etc. It is confirmed that the subjects of entrepreneurial activity of the agricultural sector of economy operated in conditions of price disparity during 2000–2019, which led to a relatively low value of their profitability. At the level of a participant in the chain of food industry entities, the price index for food industry products has been exceeded over the agricultural level, but there is a very low level of profitability – 1.4% in 2019. Analytically proved existence of a disparity between retail prices for food and agricultural products provides a profitability of wholesale and retail trade at 15.8–23.3%. Violation of the equivalence of exchange in supply chains at the level of wholesale and retail trade leads to the entry of agricultural enterprises into vertically integrated associations of the holding type. It is substantiated that ensuring the equivalence of exchange in agri-food chains requires the introduction of a set of value-added tools in the agricultural sector of antitrust regulation, market infrastructure development, rural cooperation and integration, and support for the development of small producers.
Shear and Hardness Properties Study of AA-6061 Aluminium Alloy Lap-Joints Produced by Friction Stir Spot Welding Process Using H13 Tool Steel
Authors: Mohamad Hanapiah Afif , Islam Sumaiya , Khandoker Neamul , Abdul Md Mazid 
Published: July 2021

By virtue of high-strength verses weight ratio aluminium alloys are achieving attentions in automobile, marine, and aircraft industries as it reduces the fuel consumption for running the vehicles. But their main drawback is the destruction of their carefully engineered microstructures by high heat generated in traditional welding processes. Friction Stir Welding (FSW) minimizes excessive heat in the welding zone and does not influence the microstructural features. FSW is currently one of the recommended solutions for manufacturing aluminium alloy welded machine parts. In this study, AA6061 Al-alloy strips were lap joined using the improvised FSW setup tool clamping it on the spindle of a CNC milling machine with the speed rate varied from 1000 rpm to 3000 rpm, and three different feed rates 5, 15, and 25 mm/min. Shear strength experiments of these joints revealed that samples created with the speed rate of 1000 rpm and feed rate of 25 mm/min performed best showing the highest load carrying capacity of 8976 N with elongation of 1.04%. They also demonstrated highest Vickers hardness value of 31 at the centre of the weldment.
HUBUNGAN TINGKAT KONFLIK AGRARIA DENGAN TINGKAT EFEKTIVITAS PROGRAM MODEL KAMPUNG KONSERVASI
Authors: Randi Firman Syah  , Murdianto  
Published: July 2021

Program Model Kampung Konservasi (MKK) yang dilaksanakan sejak tahun 2005 dan ditujukan untuk kampung yang berbatasan langsung atau dekat dengan Taman Nasional, yaitu Kampung Sukagalih, Cisarua, Cisalimar 1, Cisalimar 2, dan Cilodor. Program MKK memiliki cita-cita perbaikan taraf ekonomi, kemandirian masyarakat dan juga sebagai jawaban atas konflik agraria yang dewasa ini terjadi. Penelitian ini menggunakan pendekatan kuantitatif didukung pendekatan kualitatif. Pendekatan kuantitatif menggunakan alat berupa kuesioner dan pendekatan kualitatif yaitu wawancara mendalam menggunakan alat panduan wawancara. Hasil penelitian ini adalah konflik agraria yang ada mayoritas masih tergolong tinggi meskipun tidak sampai pada kekerasan. Selain itu juga efektivitas program model kampung konservasi masih tergolong rendah, hanya pada Kampung Sukagalih saja yang tergolong tinggi. Terdapat hubungan antara konflik agraria dengan efektivitas program, bahwa hanya pada kampung dengan konflik rendah yang dapat melaksanakan program dengan baik.
Kata Kunci: Efektivitas, konflik agraria, model kampung konservasi
Diskresi Hakim dalam Memutus Perkara Cerai Talak melalui Video Call pada Saat Pandemi Covid-19
Authors: Annisa Sherin Millenia  , Abdurrahman Maman , Mujahid Ilham 
Published: July 2021

Abstract. Research in this thesis is a type of descriptive research. The data used in this study is secondary data with primary legal material in the form of Al-Qur'anul Karim, Compilation of Islamic Law, Law No. 1 of 1974, Law No. 48 of 2009 on the Power of Justice. While the approach the author uses is juridical normative. The author uses data collection techniques or library research in accordance with PERMA No. 1 Year 2019 on The Administration of Cases and Hearings in the Court conducted electronically, however, the facts that occurred, the absence of the respondent at the court on the grounds that the existence of PSBB, although the call has been made officially and appropriately. In the examination of the Respondent from the attorney general the applicant submits an application to the panel of judges to continue the trial and examine the respondent via video call. The results of this study showed that the discretion of the Judge in deciding the divorce lawsuit through a video call in the Brass Religious Court, the judge prioritized the principle of justice and efficacy for the community, especially to the litigants.
Abstrak. Penelitian dalam skripsi ini merupakan jenis penelitian deskriptif. Data yang digunakan dalam penelitian ini adalah data sekunder dengan bahan hukum primer berupa Al-Qur’anul Karim, Kompilasi Hukum Islam, Undang-undang No. 1 Tahun 1974, Undang-Undang No. 48 Tahun 2009 tentang Kekuasaan Kehakiman. Sementara pendekatan yang penulis gunakan adalah yuridis normatif. Penulis menggunakan teknik pengumpulan data atau library research Sesuai dengan PERMA No. 1 Tahun 2019 tentang Adminsitrasi Perkara dan Persidangan di Pengadilan dilakukan secara elektronik, Namun, Fakta yang terjadi, ketidakhadiran dari termohon di persidangan dengan alasan saat itu adanya PSBB, meskipun telah dilakukan panggilan secara resmi dan patut. Dalam pemeriksaan Termohon dari kuasa hukum pemohon mengajukan permohonan kepada majelis hakim untuk tetap melanjutkan persidangan dan memeriksa pihak termohon melalui video call. Hasil penelitian ini menunjukkan bahwa diskresi Hakim dalam memutus perkara gugatan cerai talak melalui video call di Pengadilan Agama Kuningan, hakim mengutamakan asas keadilan dan kemanfatan bagi masyarakat, khususnya kepada pihak yang berperkara.
Cirugía tubaria
Authors: Bunster Eduardo 
Published: July 2021

La cirugía en el embarazo tubario debe, en general, ser radical en lo referente a la trompa y no debe, salvo excepciones, incluir la exéresis del ovario. La cirugía conservadora de la trompa grávida estará justificada en los casos en que la paciente sólo tenga solo ese oviducto y desee tener familia. Además, el estado de la paciente y de la trompa debe permitir tal tipo de operación. En todo caso de embarazo tu bario la trompa no afectada debe ser cuidadosamente examinada y tratado de acuerdo con lo que se encuentre, a lo menos con una hidrotubación descendente. La cirugía de las salpingitis será, por lo general radical y la trompa deberá extirparse incluyendo su porción intersticial. Sólo en los casos en que se tenga la convicción del buen estado del endosalpinx se podrá hacer cirugía tubaria conservadora. La TBC genital aunque esté clínicamente curada constituye una contraindicación para la cirugía tubaria plástica con miras a restablecer la fertilidad. La endometriosis tu baria constituye un impedimento fisiológico –cuyo mecanismo íntimo se desconoce- que impide en un alto porcentaje el embarazo. La cirugía de la endometriosis debe ser precedida y seguida de un tratamiento médico prolongado con estrógenos y progestágenos. La cirugía de la esterilidad de causa tubaria ha dado al autor un 39 % de casos con embarazos y un 34.5 % de niños vivos entre 23 operadas en los últimos 15 años. La implantación tubo-uterina ha suministrado un 33.3 % de niños vivos y un 42.85 % de embarazos entre 15 operadas. La salpingolisis entre cuatro pacientes de la presente estadística ha tenido éxito con niños vivos en dos de ellas. Nuestra estadística anterior (Bunster 1951) dio un 20 % de embarazos pero sólo un 10% de niños vivos. La salpingostomía realizada por ginecólogos extranjeros ha dado un 18 % de niños vivos pero el autor no ha conseguido jamás resultados positivos. El uso de tubos y tallos de polietileno no tiene razón de ser en las implantaciones tubo uterinas como se demuestra por el escaso porcentaje de éxitos (12%) obtenidos por Rock et al en Estados Unidos frente al 33 % obtenido por nosotros que no usamos dicho material.
Enseñanza de pre-grado de ginecología
Authors: Gonzáles del Riego M. 
Published: July 2021

La enseñanza de Ginecología en el Pre-grado debe en nuestro concepto estar dirigida a la formación del médico general dándole los conocimientos de la especialidad que le van a ser útiles para hacer un tratamiento integral de las pacientes. En nuestro país, en el cual la mitad de la población femenina es menor de 20 años y tiene problemas ginecológicos muy peculiares, la atención especializada en todos los casos no es factible, por lo que se requiere que el médico general sea capaz de tener conocimientos adecuados en ginecología y resolver algunos de estos problemas, refiriendo los casos complicados a los especialistas para un diagnóstico o tratamiento definitivo.