bluuebunny/crossref_metadata_2025 huggingface dataset:
Activated carbon supported cobalt-molybdenum carbides: effect of the synthesis method, heating rate, type of cobalt precursor and presulfiding agent on thiophene hydrodesulfurization
Authors: Puello-Polo Esneyder , Ayala Mónica V. , Brito Joaquín L.
Published: September 2023

This  work  studied  the  Effect  of  the  presulfiding  agent,  type  of  precursor (sulfate   vs.   nitrate   of   promotor),   synthesis   method   (conventional   vs.   carbothermal  carbiding)  and  heating  rate  in  the  hydrodesulfurization  of thiophene  over  activated  carbon  supported  cobalt-molybdenum  carbides.  The synthesis was carried out using the methods conventional (CH4/H2 (1:4)) and carbothermal with H2 at 973 K and 1 or 5 K/min. The carbided phases were characterized by surface area (B.E.T), X-ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The surface areas were within a rank of 266 and 493m2/g, whereas the XRD analysis verified the presence of Co6Mo6C2  for  carbides  obtained  by  carbothermal  method  independently  of  these variables. The XPS showed the presence on the surface of: Moδ+, Mo4+and Mo6+, and Co2+ whose abundance was influenced by the synthesis method and  type  of  precursor.  On  the  order  hand,  XPS  revealed  that  the  carbides  obtained by sulfate precursor retained sulfur on the surface as S2- and SO42-. Tests of thiophene HDS showed that carbides obtained by the carbothermal method had higher activity than those obtained by the conventional method when it was activated with CS2/H2 and inversely when used H2S/H2.
On the evaluation of the unicast-multicast switching point in MBMS networks for transmission power saving
Authors: Tamayo Fernández Raúl , Andrade Reátiga Ángel Gabriel , Serrano Santoyo Arturo , Conte Galván Roberto
Published: September 2023

Current  multimedia  services  are  mainly  offered  through  existing  3G  and 4G  mobile  network  infrastructure.  Data  transmission  using  these  kind  of networks is accomplished using multicast mode; in this case, the network allocates radio resources (bandwidth and transmission power) during the whole communication process. This has several drawbacks, such as bandwidth and transmission power consumption, interference and higher operational expenses. Mobile operators require new technologies to optimize their radio resources in order to get more effective operation geared to increase the customer base. Hence the need for a paradigm shift towards multicast or broadcast modes, in which several users can receive the same signal simultaneously, sharing the radio resources. In relation to the above, 3GPP provided a technical solution in the LTE Release 6 standard, which is specified as Multimedia Broadcast Multicast Service (MBMS). MBMS allows unicast to multicast transition from a “switching point” that determines the time and conditions for bandwidth and power transmission savings. This paper presents an evaluation to determine the optimal switching point under the MBMS standard for different wireless contexts. Furthermore, given that MBMS allows the use of Single Frequency Networks (SFN) topologies, with network gain properties, we also determine the additional power savings for this configuration.
Low cost heat-and-pull rig for manufacturing adiabatic optical fiber tapers
Authors: Cardona Maya Yamile , Gómez Cardona Nelson , Torres Trujillo Pedro Ignacio
Published: September 2023

In this paper we report the fabrication of adiabatic tapered optical fbers using a low cost heat-and-pull rig. Our setup is based on the ﬂame-brushing technique moving in zigzag, where an inexpensive and simple portable gas micro-torch is used as heating device. Since this method does not require an electronic system to control the gas ﬂow rate, makes out taper rig an attractive alternative, low-cost, and trivial to implement. The feasibility of such a heat source is shown with the manufacture of low-loss tapers (<0.12 dB/mm) and diameters in the micro range.
Overlapped block-based compressive sensing imaging on mobile handset devices
Authors: Aguello Fuentes Henry , Manotas Gutiérrez Irene
Published: September 2023

Compressive Sensing (CS) is a new technique that simultaneously senses and compresses an image by taking a set of random projections from the underlying scene. An optimization algorithm is then used to recover the initial image. In practice, these optimization algorithms have restricted CS techniques to be implemented on high performance computational architectures, such as personal computers or graphical processing units (GPU) due the huge number of operations required for the image recovery. This work extends the application of CS to be implemented in an extremely limited memory and processing architecture such as a mobile device. Specifically, overlapped blocking-based algorithms are developed such that it is possible to reconstruct an image on a mobile device. An analysis of the energy consumption of the block-based CS algorithms is presented. The results show the required computational time for reconstruction and the image reconstruction quality for images of 128x128 and 256x256 pixels.
Robust Design in Multiobjective Systems using Taguchi’s Parameter Design Approach and a Pareto Genetic Algorithm
Authors: Canessa Enrique , Bielenberg Gabriel , Allende Héctor
Published: September 2023

We present a Pareto Genetic Algorithm (PGA), which finds the Pareto frontier of solutions to problems of robust design in multiobjective systems. The PGA was designed to be applied using Taguchi’s Parameter Design method, which is the most frequently used approach by practitioners to executing robust design studies. We tested the PGA using data obtained from a real singleoutput system and from multiobjective process simulators with many control and noise factors. In all cases, the PGA delivered Pareto-optimal solutions that adequately achieved the objective of robust design. Additionally, the discussion of the results showed that having those Pareto solutions helps in the selection of the best ones to be implemented in the system under study, especially when the system has many control factors and responses.
Engineering iron oxide nanoparticles for biomedicine and bioengineering applications
Authors: Morales Alvaro L. , Casanova Herley , Zysler Roberto D. , Urquijo Jeaneth Patricia
Published: September 2023

In the present study the one-step coprecipitation method is used to obtain magnetic nanoparticles at controlled pH of 10 and 12, and surfactant concentration of 1% and 3%(m/m). The surfactant is sodium polyacrylate(PS), biocompatible and biodegradable, necessary attributes for biological applications. The magnetic nanoparticles have a magnetite core, and a shell of maghemite surrounded by a shell of polymer. The maghemite layer is smaller for large surfactant concentration(3%) and pH 10. The TEM images confirm the particle size distribution in the average range of 5-10 nm. Mössbauer results at 80 K showed line shapes dominated by magnetic relaxation effects with sextets and combinations of sextets and doublets for pH 12. The doublet features dominated the samples obtained at pH 10.
The interactions of the surfactant with the nanoparticle surface, mainly with the Fe3+, is strong showing at least two surfactant layers, one layer directly over the nanoparticle surface and another layer resting over the inner layer. FTIR confirmed the attachment of the surfactant to the magnetic nanoparticle surface. The nanoparticles showed superparamagnetic behavior at room temperature and ferromagnetic properties at 5 K. The saturation magnetization presented lower values than reported bulk systems due to the presence of a large layer of maghemite. The very close particle size for all samples gave indication that the particle growth was dominated by the surface properties of the nanoparticles and that the pH and surfactant concentration did not affect importantly the growth process.
Volumetric and viscometer properties binary mixtures of N,N-dimethylformamide + 1-pentanol at various temperatures
Authors: Páez Francsisco J. , Páez Manuel S. , Lans Edineldo
Published: September 2023

Se  determinaron  las  densidades  y  viscosidades  de  las  mezclas  binarias  de  N,N-Dimetilformamida  (DMF)  +  1-pentanol  sobre  todo  el  intervalo  de  concentraciones  a  las  temperaturas  de  (283,15,  288,15,  293,15,  298,15  y  313,15) K utilizando un densímetro de tubo vibratorio Anton Paar DMA 5000 y  un  viscosímetro  Anton  Paar  AMVn  respectivamente.  Se  calcularon  los  volúmenes molares de exceso , las desviaciones de viscosidad, los coeficientes B de viscosidad y los parámetros de activación del flujo viscoso. Se discutieron los efectos de la concentración del 1-pentanol y de la temperatura sobre los parámetros  previamente  mencionados.  Los  resultados  fueron  interpretados  en  términos  de  interacciones  soluto-solvente  en  medios  orgánicos.  Los  volúmenes molares de exceso resultaron ser negativos, y fueron atribuidos a la presencia de varios factores: fuerzas atractivas tipo puentes de hidrógeno soluto-solvente, fuerzas físicas más débiles como la fuerza bipolar o cualquier otra  fuerza  de  este  tipo;  así  como,  al  acomodamiento  de  las  moléculas  del  alcohol  en  los  espacios  de  las  moléculas  de  la  DMF.  Las  desviaciones  de  viscosidad son altas y negativas en todo el intervalo de concentraciones y se incrementan  al  aumentar  la  temperatura,  lo  cual  podría  indicar  la  presencia  de interacciones específicas entre las moléculas de 1-pentanol y la DMF, mientras que los altos valores negativos se pueden interpretar considerando la fuerza de los enlaces de hidrógeno, la forma y el tamaño de las moléculas estudiadas.
Effect of shaping method on the densification of SnO2 ceramic pieces
Authors: Ochoa-Muñoz Yasser Halil , Rodríguez-Páez Jorge Enrique , Aguilar-Paz Carol Julieth
Published: September 2023

Tin oxide, SnO2, has a big technological importance. For its uses it is of great interest to optimize the sintering conditions to obtain an adequate densification, microstructure and mechanical properties, depending on the technological application. In this paper, ceramic powders of SnO2 obtained by controlled precipitation method were sintered. Powders were shaped to obtain “green” pieces using both pressing and by the casting method (“slip casting”) for this. For the slip casting method was realized a careful study of SnO2 suspensions to obtain a stable slurry. For determine the effect of shaping methods on the densification of pieces, were obtained important information analyzing the results of curves of weight loss, shrinkage and densification, as temperature functions, of the different samples. Finally, the sintered pieces were characterized using SEM to know their microstructure. The shaped pieces using colloidal method showed the higher density values (ρ = 4.2 ± 0.2 g/cm3). These samples showed a uniform microstructure with very small pores. These characteristics would allow their use as membranes or gas sensors.
Effect of the fusion and aging process in the synthesis of zeotypes from fly ash
Authors: Lizcano-Cabeza Jeimer Alexander , Ávila-Ascanio Luis Fernando , Ríos-Reyes Carlos Alberto , Vargas-Fiallo Luz Yolanda
Published: September 2023

In this study, we evaluate the use of a sample of fly ash from TERMOPAIPA (Boyacá, Colombia) as the starting material for the synthesis of zeotypes on laboratory scale through its transforming via alkaline fusion, using solid or water dissolved NaOH, followed by aging during 6, 12 and 24 h under static or ultrasound conditions prior to hydrothermal treatment during 6, 12 and 24 h of reaction time. Experimental data reveal that the method, state of alkaline fusion, temperature and time of reaction strongly affect the zeotype to be synthesized. Low-silica sodium zeotypes were synthesized, which include zeolite NaP1, faujasite, and traces of sodalite. The synthesis of zeotypes from fly ash represents an interesting alternative for the mitigation of the environmental problem associated to the disposal of industrial wastes. Therefore, fly ash-based zeotypes synthesized under optimum experimental conditions can be used in several applications for environmental waste treatment.
Performance assessment of internal logistics for service companies
Authors: Alves Vanessa Teresinha , Mairesse-Siluk Julio Cezar , Neuenfeldt-Júnior Alvaro Luiz , Soliman Marlon , Dalla-Nora Lissandro Dorneles
Published: September 2023

The present research aims to propose a model for evaluating the performance of the internal logistics for a service company, based on Multicriteria Constructivist methods, towards a systematic mapping of the current context situation, aiming to find opportunities to improve its processes. It was found that, considering the difficulties of managing logistics flows, the method allows assisting in the identification, organization, measurement and integration of the variables through a systemic and participatory manner. As practical implications, it was provided conditions for the company to measure its actions, sustaining indexes for goal setting and periodic assessments. This research also presents the importance of this type of methodology for the provision of logistics services, a subject underexplored in the scientific literature, especially when using constructivist approaches.
Influence of data quality in the preferences of citizens in Municipal e-Government applications
Authors: Fuentes-Moya Claudia Loreto , Caro-Gutiérrez María Angélica , Rodríguez-Ríos Alfonso Enrique
Published: September 2023

The  e-Government  represents  the  government-citizen  relationship,  through   the use of information technologies. Through e-Government the governments,  offer different utilities and information, trying with this, to make life easier  for  citizens  and  to  facilitate  the  public  administration.  This  implies,  among   other  things,  strong  data  exchange  between  government  and  citizens.  This   leads us to think that the quality of the data could become an important factor  when  attempting  to  promote  the  use  of  e-Government.  Consequently,  this   article  focuses  on  studying  the  views  of  citizens  regarding  the  presence  of   data  quality  in  Municipal  e-Government  applications.  Concretely,  the  case   study,  has  shown  that  citizens  recognize  and  prefer  an  application  with   improved data quality.
Molecular dynamics simulations of nanoindentation in Cr, Ni, and Ni/Cr bilayer films using a hard spherical potential
Authors: Arias Mateus Diego Fernando , Amaya Roncancio Sebastian , Restrepo Parra Elisabeth , Gómez Hermida Mónica María , Riaño Rojas Juan Carlos
Published: September 2023

Molecular dynamics (MD) simulations of nanoindentation using the hard sphere potential were carried out for Cr, Ni and Ni/Cr bilayer thin films with interaction of BCC and FCC single-crystal and the contact between the Cr-Ni. On the other hand, fixed boundary conditions were used and the repulsive radial potential was employed for modeling the interaction between the tip and sample surface. Mechanical properties of the material at 300 K were obtained for Cr and Ni thin films and Ni/Cr bilayers. Hardness and elastic parameters were determined from the load-unload curves obtained by means of the simulations. These results show a better mechanical response in the case of bilayers compared to the Ni and Cr monolayers.
Automated design of customized implants
Authors: Chulvi Vicente , Cebrian Tarrasón David , Sancho Álex , Vidal Rosario
Published: September 2023

This paper presents a model capable of design a customized cranial implant directly from a medical imaging process, whose output will be a file in a manufacture system recognizable format.The proposed system has been created by linking two computer prototypes developed during the present research and studying the inner and outer related technologies. The core of the model is the KBS (Knowledge Based System) technology, able to store and manage medical data, as well as designer knowledge, in order to use this information in the implant design process. The aim of this project is to obtain a tool to improve the design process, the biocompatibility with patient and reduce final costs, which can be operated without necessity of wide knowledge from the user.
heuristic decomposition method for large-scale traffic assignment: Aburra Valley case study
Authors: Lotero Laura , Jaramillo Patricia , Rave Claudia Cristina
Published: September 2023

Traffic assignment is one of the most important stages in transportation planning; however, its application to real case studies in medium- to largesized cities makes the solution of the model difficult because of the scale and high computational complexity related to the combinatorial and non-linear nature of the problem. The aim of this paper is to present a decomposition method based on sub-region analysis, and a simple heuristic rule for solving large-scale traffic assignment problems. This reduces the total amount of variables and equations of the model and offers a practical solution in a reasonable computing time. The proposed traffic assignment model is applied to the multimodal main road network of the Aburra Valley, Colombia. Such an application of a great amount of variables and equations converts the model into a large-scale problem. The proposed method considerably reduces the computational complexity of the problem, and it reveals accurate solutions in an execution time which is reasonable for such a large-scale model.
Treatment of lack of information in process mining
Authors: Yzquierdo-Herrera Raykenler , Silverio-Castro Rogelio , Lazo-Cortés Manuel
Published: September 2023

Process mining is a research discipline including discovery, monitoring and improvement of real processes by extracting knowledge from event logs readily available in today's information systems. Most process mining algorithms assume that the traces are complete and free of noise. In reality, this assumption is rarely met. The lack of information affects the structure and understanding of the model discovered. The paper proposes a set of steps to estimate the lack of information in the traces used in processes mining. Align traces during the pre-processing stage is proposed as part of the estimation in order to detect possible situations in which lack of information is manifested. From detected situations, missing information is estimated and a new record is generated in correspondence to the event, which can be used by different process discovery algorithms. Finally we discuss the experimental results obtained from implementing the approach.
Hydrolysis time influence in obtaining hybrid film with addition of cerium ions for protecting galvanized steels
Authors: Kunst Sandra R. , Ludwig Gustavo A. , Matos José F. , Malfatti Célia F.
Published: September 2023

The hybrid films act as a barrier layer between the substrate and the environment. This kind of coating reduces the electrolyte permeability, decreasing the corrosion rate of the substrate. However, many variables influenced the corrosion resistance of hybrid coating. The main factors that influence the thickness of the films are: temperature, curing time, the concentration alcooxide precursors on the bath, the pH of the hydrolysis and the hydrolysis time. In this study, the galvanized steel was coated with and hybrid film obtained from precursors consisting of a sol alcooxide 3-(trimetoxisililpropil) methacrylate (TMSPMA) and tetraethoxysilane (TEOS) with cerium nitrate addition [0,01 M]. The hydrolysis time was varied in four levels of (1, 3, 24 and 48 hours). The characterization of the films was performed by SEM, profilometry, contact angle determination, polarization and electrochemical impedance spectroscopy measurements. Results showed that the hydrolysis time presented influence on the hybrid film properties and consequently on the protection.
A nonlinear finite element model of lightweight walls with cold formed steel members under lateral load
Authors: Gaviria M. Carlos Andrés , Guerrero Z. Aydée Patricia , Thomson R. Peter
Published: September 2023

This article presents the results of an investigation aimed at generating finite element models (FEM) for studying lateral load behavior of lightweight walls composed of a typical steel framing and different coating materials. Initially, the elements and connections were characterized with standard tests, based on this information and research by [1] finite element models were built that included the nonlinear behavior of the connections between elements. This model was updated for different coating materials using experimental results of lateral loads test conduced on full-scale prototypes for five different coating configurations. However large differences were found when compared the model updating parameters with initial parameters on the FEM model. These differences are attributed to the dissimilar materials working together as a composite rather than as individually. The model was validated with a configuration combining coating materials producing results with a 6.9% difference with respect to experimental data. This indicates an acceptable predictability of the model for other coating materials.
Total Lagrangian Finite Element Formulation of the Flory-Rehner Free Energy Function
Authors: Juha Mario J.
Published: September 2023

The total Lagrangian finite element implementation of the Flory-Rehner free-energy function in the framework of a hyperelastic material model is addressed. It is explicitly given all the equations required to implement this material model in an implicit nonlinear finite element analysis, particularly, it is shown how to derive the so-called algorithmic or consistent linearized tangent moduli in the Lagrangian description. Some analytical and numerical results for different boundary-value problems are presented to validate the implementation.
Influence of season and species Phragmites australis and Schoenoplectus californicus on the removal of organic matter and nutrients contained in sewage wastewater during the start up operation of the horizontal subsurface flow constructed wetland
Authors: Rojas Karen , Vera Ismael , Vidal Gladys
Published: September 2023

The Wastewater Treatment Plant (WWTP) based on horizontal subsurface flow constructed wetland (HSS) achieved its full operation after two years of implantation. Removal efficiency of this WWTP is function of seasonality, type of species plant and maturity period of the system. The objective of this work is evaluating of the influence of season and plant species Phragmites australis and Schoenoplectus californicus in removal of organic matter and nutrients in HSS units during start up operation phase. To this end, four HSS units were implemented in Mediterranean Austral weather conditions. Two HSS units were planted with Phragmites australis, and the other two HSS units were planted with Schoenoplectus californicus. This paper shows results from start up operation phase which cover the first 193 days. It was evaluated the influence of plant species and season (winter and spring), in the removal efficiency of organic matter (5-day Biological Oxygen Demand, BOD5, and Chemical Oxygen Demand, COD) and nutrients (nitrogen (NH4 +-N, NO3 - -N and TN) and phosphorus (PO4 -3-P and TP)). The HSS units planted with Phragmites australis showed better early adaptation than HSS units planted with Schoenoplectus californicus. However, removal efficiencies were similar in all units. Seasonality, it can evidence differences for COD (winter: 18 to 30%, spring: 45 to 55%) and TN (winter: 25 to 65%, spring: 25 to 35%).
Processing, characterization and biological testing of electrochemically modified titanium for dental implants
Authors: Pavón Palacio Juan José , Arias Suarez Sandra Liliana , Echeverry Rendón Mónica , Robledo Restrepo Sara María , Arismendi Echavarría Jorge Alberto , Escobar Sierra Diana Marcela , Ossa Orozco Claudia Patricia
Published: September 2023

Biomedical applications of titanium and its alloys are possible due to their suitable characteristics for bone replacement, including good mechanical properties, excellent corrosion resistance and high biocompatibility. However, one of their main limitations is the fibrous tissue capsule that is formed around the material, which can be related with implants loosening. As an alternative to solve this problem, in this work were carried out some chemical and electrochemical modifications of titanium surface, in order to evaluate their influence on implants osteointegration through in vitro testing in contact with osteoblasts. Results of scanning electron microscopy (SEM), roughness parameters measured and osteoblasts morphology indicate that there is a relationship between surface roughness and bone cells adhesion. Surfaces with highest vertical roughness parameters, within evaluated conditions, allowed better cells adhesion. These results suggest that a combination of chemical and electrochemical techniques can help to control surface roughness of titanium dental implants and, by this way, it can also allow to optimize osteointegration.
empirical method for the estimation of yield strength on bonds and strands of expanded metal meshes
Authors: Smith-López Dimas José , Graciano-Gallego Carlos Alberto , Aparicio-Carrillo Gennifer Nataly
Published: September 2023

The manufacturing process of expanded metal meshes is based upon an in-line expansion of partially slit metal sheets, creating a pattern formed by strands and bonds. After this process, the mechanical properties of the base material change, especially in the bonds. Due to the size of strands and bonds it is difficult to quantify the amount of cold work that the base metal undergoes, hence the mechanical properties in the final meshes are difficult to predict. This paper presents an empirical method for the estimation of the yield strength on standard and flattened expanded metal, correlating Vickers microhardness with the yield strength using the Tabor’s relationship. In addition, the effect of various heat treatments on the yield strength of expanded metal was investigated. Results show that the yield strengths estimated through the Tabor’s equation are in good agreement with those obtained through standard mechanical testing, for various levels of cold work. In addition, it was found that the manufacturing process introduces some degree of heterogeneity and anisotropy in the material, and that long times of exposure to heat treatments are required to mitigate the effects of the cold work.
Design, modeling and dynamic simulation of three double stage gearboxes with different module, mesh stiffness fluctuation and different level tooth breakage
Authors: Ruiz-Botero Jairo Alberto , López-López Juan Fernando , Quintero-Riaza Héctor Fabio
Published: September 2023

This paper presents the detection of failure in gears using, as a statistical indicator, the Root Mean Square value from the vibration residual signal. Models for three double stage gearboxes are considered on the analysis. The gear models are designed with different modules in order to preserve geometrical resemblance. This research shows the variation on gear mesh stiffness for different amounts of damage. This paper also describes the development of a model to simulate the vibration response from the double stage gearbox for conditions with and without failure. The variation on time of the gear mesh stiffness is taken into account on the dynamic simulation, and damping coefficient is considered proportional to gear mesh stiffness. Results obtained from dynamic simulation for both good state and with failure teeth are in accordance with the results reported on literature.
Preliminary
Authors: Gómez Botero Maryory Astrid
Published: September 2023

Revista Facultad de Ingeniería published its first issue in 1984, as the materialization of the efforts of many professors, especially from the School of Engineering. In tribute to those leaders and visionaries, who believed and made this dream possible, I'd like to remember the first members of the Editorial Board. Dr. Germán Urrego was the Dean in turn, Dr. Oscar Piedrahíta, the Journal Editor, Dr. Gildardo Hernández, the Deputy Director, and Dr. Rodrigo Peñaloza, the representative of the research centers.
Use of Evidence-Based Evaluation Criteria for Inclusive Practices in Competitive Procedures
Authors: Alekhina S.V. , Bystrova Yu.A. , Samsonova E.V. , Shemanov A.Yu.
Published: September 2023

The work presents the results of approbation of the approach to expert evaluation of inclusive practices in educational institutions developed at the Institute for Problems of Inclusive Education of the Moscow State University of Psychology and Education based on the integration of inclusiveness criteria and evidence requirements. The assessment involved 25 federal experts on inclusive education, who evaluated 30 cases in three nominations of inclusive practices submitted to the federal stage of the competition. The assessors scored the applications by completing expert protocols, which were processed to determine the level of inclusivity of the practice (zero, initial, basic, or advanced). Then a reflective discussion was organized on the application by experts of the approach we developed to assessing inclusive practices according to the criteria of inclusiveness and evidence, the results of this discussion were subjected to thematic analysis. The study revealed that the distribution of expert assessments of inclusive practices by levels differs from uniform (p < 0,01), confirming the effectiveness of the criteria as an assessment tool. At the same time, the reproducibility of the results of the expert assessment turned out to be at an acceptable level (83%), taking into account the unreliability of differentiation of the zero and initial levels (sample of repeated measurements: N = 12). The thematic analysis of expert reflection showed the usefulness of evaluation criteria as a tool not only for examination, but also for the development of expert thinking of the experts themselves, as well as the professional development of the contestants. Also, the results of the thematic analysis revealed the need for a broad discussion and further study of the key categories of inclusion (diversity, participation, acceptance, etc.) to operationalize them more accurately as inclusion criteria.
Conscious Self-Regulation and Academic Motivation as Resources for Students to Perform Research Project Work
Authors: Morosanova V.I. , Filippova E.V. , Fomina T.G.
Published: September 2023

The article presents the results of an empirical study of the relationship between the regulatory competencies of students, different types of academic motivation and successful performance of the research project work. Diagnostics of regulatory competencies was carried out by means of Morosanova’s "Self-regulation profile of learning activities questionnaire - SRPLAQ-M"; academic motivation was assessed using Gordeeva’s "Scales of academic motivation of schoolchildren". The diagnostics was carried out at the beginning of the academic year. Criteria-based assessments, set by the expert teachers, were used as indicators of the project work success. The study, performed on a sample of 9th grade students (N=187, 15-16 years old), provided evidence that regulatory competencies and motivation serve as prerequisites for the students’ success in research project work. The study allowed to empirically distinguish between the universal and special regulatory competencies. The data analysis revealed the resource role of regulatory competencies in performing an individual research project. It is shown that the general level of the conscious self-regulation development characterizes the universal resources for successful performance of an individual project and is positively associated with all expert criteria for assessment research project success. Special regulatory resources are the modeling of significant conditions and evaluating the results of actions. The study also revealed a mediator role of the regulatory competence of evaluating results in the relationship between the students’ academic motivation and the final assessment of the research project.
Separation of Parents and Children in the Context of Realization of the Right to Education
Authors: Kosova O. Yu.
Published: September 2023

The paper examines the phenomena that in the legal vocabulary are called «separation of a parent and a child» and «taking children away from parents». The author proceeds from the fact that in the family upbringing of a child by his parents is carried out through direct personal communication between each of the parents and the child during their family life. Therefore, the subjective right to upbringing should have legally significant guarantees of such communication. Based on the analysis of the norms of law and law enforcement practice, the author gives definitions of the legal phenomena under consideration.Separation on their own initiative is the most widespread in the relationship between parents and children, the need for which is predetermined by the conditions of their social life in the family and beyond, which in a number of cases directly established by law requires legal formalization. The termination of family ties and the loss of the possibility of family communication between parents and children on the initiative and with the participation of bodies performing public functions should be regarded as an exception, be temporary in nature and comply with legal parameters. The ultimate goal of the measures under consideration should be to improve the health of the family rather than to distroy it. In this regard, special attention is paid by the author to individual cases of taking children away from the family provided for in the Family Code of the Russian Federation, as well as guarantees established by specific Russian legislation for the preservation of interpersonal contacts between parents and children in various situations. In the aspect of the need for maximum preservation of child-parent relations, the paper gives the assessment of family legal regulation and indicates the conflicts and gaps existing in the legal regulation. The author examines the measures taken in recent years and aimed at reducing the number of unjustified and illegal selections associated with the application of Article 77 of the RF Family Code on the immediate selection of children with an immediate taking children away from the family if there is a threat to their life and health.
The Principle of Estoppel in Civil Law as a Mechanism for Preventing Contradictory Behavior
Authors: Yakusheva E. E.
Published: September 2023

The paper examines the legal nature of the estoppel principle, applied both as a result of unfair actions of the party and because of the party’s inconsistent behavior. The paper analyzes the possibility of applying the German principle of protestatio facto contraria (objection to the actual expression of will) and compares estoppel and the continental law principle venire contra factum proprium.The study classifies the rules of law regulating the application of the estoppel principle; two categories of norms are distinguished, namely, the norms related to the prohibition of unfair actions and the norms aimed at preserving the contract. The author compares the norms of the Russian civil legislation regulating the application of the estoppel principle and highlights the conditions under which its application is allowed. The paper discusses the possibility of applying the principle of estoppel in the absence of the party’s intentions to harm the counterparty. The author analyzes the court practice related to the prohibition of contradictory behavior. In particular, the author analyzes legal disputes caused by the parties’ references to the non-conclusion or invalidity of the contract, as well as related to the inconsistent refusal of the party from the contract. Additionally, the author identified the circumstances to be proved when referring the parties to the need to apply the estoppel principle. Based on the results of the analysis, the author proposes options for improving legislative regulation of the application of the estoppel principle. In particular, the author proposes to introduce the following criteria for analyzing the need to apply the estoppel principle: the degree of validity and reasonableness of expectations of the counterparty’s behavior; analysis of the counterparty’s behavior; a causal relationship between an inconsistent behavior of the party and the damage caused to the relying party; the degree of damage caused to the party as a result of the counterparty’s unscrupulous behavior.
Implementation of the Law of the People’s Republic of China «On Higher Education» in China: Achievements, Problems and Solutions
Authors: Shaoxue Jia
Published: September 2023

The Law of the People’s Republic of China «On Higher Education» is the main regulatory act in the field of higher education in China. It was adopted in 1999, had a significant impact on the education sector as a whole, and made it possible to solve a number of key problems at that time.The paper analyzes the relevant data on the achievements of the implementation of the Law of the People’s Republic of China «On Higher Education» for a period of more than 20 years since its entry into force. The quality of staff training has steadily improved; the efficiency, scale and structure of higher education have achieved significant success. The law effectively guaranteed the right of citizens to receive higher education, gradually rationalized the internal and external management structures of higher education institutions. The causes of fundamental problems are also disclosed. The author proposes ways to improve the current legislation and ways to solve emerging problems. For example, it is suggested creating a more scientific and effective assessment and control system in order to strengthen the role of the academic council of universities; improving channels for resolving academic disputes, expanding the categories of disputes between professors and universities, subject to courts; ways of disclosing information on the assessment of the level of higher education; accelerated deep integration of modern information technologies and teaching in the field of education, etc.The Law of the People’s Republic of China «On Higher Education» gives clearer answers to a number of important issues of the development of higher education, such as the relationship between the state (government) and universities, the autonomy of universities and the internal management system of universities. However, taking into account the rapid development of society, its democratization and the growing interest in the mechanisms of protection of individual rights, the institute of higher education in China, largely built on the basis of the analyzed normative act, is hardly able to continue to fulfill its role in the conditions of modern times.
Supporting Black Girls' Creativity as They Learn to Code Virtual Environments
Authors:   , Woodard Monique A. , Foster Aroutis
Published: September 2023

This mixed methods study examines the creativity of Black girls as they learned to code virtual environments in an afterschool program. The afterschool program, West Philly Tech Camp/Black Girls in Computing was a nine-week program in which students learned to code a virtual chatbot using Python. The program's design was guided by culturally responsive computing (CRC) and Black feminist theory. Creativity was operationalized using the collect, analyze, synthesize, evaluate, and employ (CASEE) framework. Participants were encouraged to integrate their personal experience and background into their projects. Similar to prior studies, participants learned the basics of coding during the first three weeks of the program with block coding then transitioned to Python. However, the students also learned about Python alongside the block codes. Next, they were encouraged to integrate their personal and cultural backgrounds into the design of their virtual chatbots. The participants completed this study with knowledge about computing careers and a basic understanding of Python. The purpose of this study was not to convince the students to become computer scientists, but to empower them to become producers of technology. The findings of this dissertation add to existing creativity literature, as there is a dearth of research regarding Black creativity. The results revealed the methods Black girls engage in creativity as they create virtual chatbots. Data was analyzed using Epistemic Network Analysis (ENA) to capture and examine the participants' nuances while they developed their virtual chatbots. During the program, participants utilized their resources, including their peers, instructor, and the online webtool, to debug their code.
Incidência do Imposto Sobre Serviços de Qualquer Natureza na Atividade Notarial e Registral
Authors: Guedes Mauricio Barroso
Published: September 2023

Em síntese, o presente estudo aborda o Imposto sobre Serviços de Qualquer Natureza aplicado aos notários e registradores, analisado à luz da Lei Complementar nº 116/2003 e do Decreto-Lei nº 406/68. Por meio de um estudo doutrinário e jurisprudencial este artigo tem por objetivo geral demonstrar a pessoalidade com que são prestados os serviços nas Serventias Extrajudiciais, com a indicação das características específicas da atividade. Isso porque desempenham uma atividade delegada pelo Poder Público, a qual assumem após aprovação em concurso público atrelado à pessoa física do candidato, possuem responsabilidade pessoal por todos os atos praticados na serventia, são dotados de fé pública (atribuída ao titular) e exercem a função de forma autônoma (são responsáveis pessoalmente por todos os gastos e contratos celebrados para o funcionamento da serventia). Acrescenta-se, ainda, o fato de que os agentes delegados são considerados como autônomos para fins previdenciários e obrigados ao recolhimento de imposto de renda como pessoas físicas. Como objetivo específico, buscou-se demonstrar que a tributação sobre notários e registradores deve ser realizada na forma de alíquotas fixas ou variáveis, nos termos do art. 9º do Decreto-Lei nº 406/68, ao contrário do que preveem a maioria das Leis Municipais que instituem o imposto sobre estes profissionais na forma de percentual sobre seus rendimentos brutos.
Palavras-chave: Notários. Registradores. ISSQn. Imposto. Alíquota.
AbstractIn summary, this study addresses the Tax on Services of Any Nature applied to notaries and registrars, analyzed in the light of Complementary Law No. 116/2003 and Decree-Law No. 406/68. Through a doctrinal and jurisprudential study this article has as general objective to demonstrate the personhood with which the services are provided in the Extrajudicial Services, with the indication of the specific characteristics of the activity. This is because they perform an activity delegated by the Public Power, which they assume after approval in a public tender linked to the candidate's natural person, have personal responsibility for all acts performed in the service, are endowed with public faith (attributed to the holder) and exercise the function autonomously (they are personally responsible for all expenses and contracts entered into for the operation of the service). Added to this is the fact that the delegated agents are considered as autonomous for social security purposes and obliged to collect income tax as individuals. As a specific objective, it was sought to demonstrate that the taxation on notaries and registrars should be carried out in the form of fixed or variable rates, under the terms of article 9 of Decree-Law No. 406/68, contrary to what is provided for in most of the Municipal Laws that establish the tax on these professionals in the form of a percentage of their gross income.
Keywords: Notaries. Registrars. ISSQn. Tax. Rate.
Nowcasting and Forecasting Key Russian Macroeconomic Variables With the MFBVAR Model
Authors:   Russian Academy of National Economy and Public Administration, Fokin Nikita ,   Gaidar Institute for Еconomic Policy
Published: September 2023

This paper examines the quality of nowcasts and forecasts for Russian GDP and its components (in constant and current prices) using a mixed-frequency Bayesian vector autoregression model (MFBVAR) which is currently one of the most advanced time series forecasting models. It enables use of quarterly and monthly frequency data within a single monthly frequency VAR model in a statespace form while taking into account the intra-quarter dynamics of monthly indicators; this approach improves forecasting accuracy when new monthly data is published. The MFBVAR model’s resistance to the jagged edge problem is especially important for real-time forecasting, and it can incorporate a large number of predictors because of its Bayesian estimation with a Minnesota-type prior distribution. The paper sets up three experiments with differing availability of monthly data in order to test pseudo out-of-sample nowcasting and forecasting. The MFBVAR model exhibits statistically significant outperformance compared to a naïve benchmark, as well as to ARIMA and quarterly BVAR models, in nowcasting and forecasting a few steps ahead for GDP, consumption and foreign trade variables. The test sample is also quite representative and covers two crisis periods, specifically 2015 and 2020. In both crises, the model accurately estimates the scale of the recession and recovery of economic activity. Nevertheless, there was no significant improvement in the quality of forecasts when new available monthly data was introduced.
Investing Pension Savings in Russia: Results and Lessons for the Future
Authors:   Russian Presidential Academy of National Economy and Public Administration, Abramov Alexander , Chernova Maria
Published: September 2023

A mandatory savings pillar was added to the Russian pension system in 2002, but by 2022 the Ministry of Finance terminated it and transformed it into voluntary pension savings. Because it was in effect for much less time than the typical life-cycle horizon, mandatory pension savings never had a chance to show its potential for increasing the pension benefits of future pensioners. The successful implementation of a mandatory savings pillar requires that general rules and regulation remain stable over at least a 40-year time horizon for the accumulation phase and a 20-year time horizon for the decumulation or payout phase. In addition to the brevity of its existence, the mandatory savings pillar also faced several other obstacles. The state prioritized the welfare of existing pensioners, and this bias eventually led to the introduction of more and more restrictions on the pension savings pillar and its coverage. Many problems arose in the administration of pension savings and in coordinating the actions of various government departments involved in its regulation. Low investment efficiency for pension savings, irrational asset allocation in non-state pension funds’ portfolios, and poor active management decisions were among other issues. Based on the problems outlined, the authors have formulated basic proposals for the future of the pension savings system