bluuebunny/crossref_metadata_2025 huggingface dataset:
A retrospective cohort study to observe the efficacy and safety of Endoscopic Submucosal Dissection (ESD) with adjuvant radiotherapy for T1a-MM/T1b-SM Esophageal Squamous Cell Carcinoma (ESCC)
Authors: Lu Hongna , Bei Yanping , Wang Chunnian , Deng Xi , Hu QinQin , Guo Wenying , Zhang Xuesong
Published: February 2024

Background and aim

The clinical outcome of endoscopy submucosal dissection with subsequent radiotherapy for esophageal squamous cell carcinoma remain unclear. In this study we aim to investigate the efficacy and safety of endoscopic submucosal dissection with adjuvant radiotherapy in the treatment of superficial esophageal squamous cell carcinoma involving the muscularis mucosae (T1a-MM) or the submucosa < 200 μm (T1b-SM1).

Methods

We analyzed 20 patients with pathologically confirmed T1a-MM or T1b-SM1 esophageal squamous cell carcinoma treated by endoscopic submucosal dissection from 2016 to 2020 in Lihuili Hospital, 9 patients received adjuvant radiotherapy (RT group) and 11 patients received did not (non-RT group).

Results

All 20 patients underwent en bloc resection, and both the vertical and horizontal margins were negative. There was no recurrence or lymph node metastasis in the RT group, and no serious complications or death were observed. In the non-RT group, 2 patients had local recurrence and 1 had distant metastasis. None of the 20 patients died of esophageal carcinoma.

Conclusions

Adjuvant radiotherapy following endoscopic submucosal dissection may be a safe and effective method for the treatment of T1a-MM/T1b-SM1 superficial esophageal squamous cell carcinoma.
Ecological economics as the science of sustainability and transformation: Integrating entropy, sustainable scale, and justice
Authors: Haddad Brent M. , Solomon Barry D.
Published: February 2024

Ecological economics, developed in the late 1980s, came to be known as the multi- and transdisciplinary science of sustainability. Since that time, it has blended basic and applied research with the intention of both informing and bringing change to environmental policy, governance, and society. However, many conventional economists have questioned its originality and contributions. This paper begins by clarifying the foundational perspectives of ecological economics that it engages an economy embedded in both real and limited ecosystems as well as socially constructed power relations. Herman Daly, a founder of the field, expanded on Nicholas Georgescu-Roegen’s entropy economics by focusing on a quantifiable sustainable scale of the economy and achieving justice in the control and distribution of economic benefits. He called for both quantitative analyses of economic scale and discursive approaches to a just distribution. The paper then discusses how the terms entropy, scale, and justice are used and interact in the literature, illustrated by some of the key debates in the field involving the Ecological Footprint, substitutability of natural and manufactured capital, and the growth—“agrowth”—degrowth debate. The debates also illustrate the potential for the field to influence policy. Ecological economics as the science of both sustainability and transformation can deploy numerous concepts and tools to provide insights on how to illuminate and solve some of the most pressing problems of the Anthropocene.
Mundos de língua portuguesa – olhares cruzados (I): Temas de linguística e didática
Authors: Tocco Valeria , Araújo Filipa Medeiros , André Carlos Ascenso
Published: February 2024

Mundos de língua portuguesa - olhares cruzados apresenta a síntese do debate científico que vários especialistas ligados à Associação Internacional de Lusitanistas compartilharam na cidade de Roma, em tempo de pandemia. Neste volume são reunidos estudos sobre o português e a didática da língua portuguesa nas suas variedades, que vão da gramática histórica à comunicação publicitária, das traduções económicas às tecnologias para a sala de aula, do ensino-aprendizagem no séc. XVI ao português jurídico de hoje, do infinito pessoal à clivagem, sem esquecer o eixo diacrónico, sociológico e pragmático.
Mundos de língua portuguesa – olhares cruzados (II): Reflexões interartes sobre Cultura e Teoria literária
Authors: Tocco Valeria , Araújo Filipa Medeiros , André Carlos Ascenso
Published: February 2024

Mundos de língua portuguesa - olhares cruzados apresenta a síntese do debate científico que vários especialistas ligados à Associação Internacional de Lusitanistas compartilharam na cidade de Roma, em tempo de pandemia. Neste volume são reunidos estudos que problematizam questões de ordem sociológica, antropológica, ecocrítica ou interartística, transversais à comunidade de língua portuguesa. Encontram-se ainda contribuições que tratam de jornalismo, museus, turismo cultural, cinema, teatro, arquitetura e temas de cultura galega.
Mundos de língua portuguesa – olhares cruzados (III): Da literatura em Portugal: ficção, poesia, teatro, crítica
Authors: Tocco Valeria , Araújo Filipa Medeiros , André Carlos Ascenso
Published: February 2024

Mundos de língua portuguesa - olhares cruzados&lt; apresenta a síntese do debate científico que vários especialistas ligados à Associação Internacional de Lusitanistas compartilharam na cidade de Roma, em tempo de pandemia. Neste volume são reunidos ensaios que, na área dos Estudos Portugueses, abordam autores, temas, textos e géneros literários da Idade Média aos nossos dias – um percurso diacrónico e metodologicamente variado sobre obras e figuras do panorama literário em Portugal, estimulante e complexo.
Adaptive and Robust Following of 3D Paths by Holonomic Manipulator
Authors: Mazur Alicja , Kaczmarek Mirela
Published: February 2024

This paper addresses the problem of following three‐ dimensional path by holonomic manipulator with para‐ metric or structural uncertainty in the dynamics. De‐ scription of the manipulator relative to a desired three‐ dimensional path was presented. The path is parame‐ terized orthogonally to the Serret‐Frenet frame which is moving along the curve. The adaptive and robust control laws for stationary manipulator which ensures realiza‐ tion of the task were specified. Theoretical considerations are supported by the results of computer simulations con‐ ducted for RTR manipulator.
Notch and Cdk5 in Zebrafish mindbomb Mutant: Co-regulation or Coincidence?
Authors: Kanungo Jyotshna , Goswami M. T. , Pant H. C.
Published: February 2024

Notch signalling is critical for the development of the nervous system. In the zebrafish mindbomb mutants, disruption of E3 ubiquitin ligase activity inhibits Notch signalling. In these mutant embryos, precocious development of primary neurons leading to depletion of neural progenitor cells results in a neurogenic phenotype characterized by defects in neural patterning and brain development. Cyclin-dependent kinase 5 (Cdk5), a predominant neuronal kinase, is involved in a variety of essential functions of the nervous system. Most recently, mammalian studies on Notch and Cdk5 regulating each other’s function have been emerging. The status of Cdk5 in the mindbomb mutant embryos with excessive primary neurons is not known. In situ hybridization of the zebrafish mindbomb mutant embryos uncovered a robust upregulation in Cdk5 expression but with a reduced Cdk5 activity. The implications of these findings in both the mammalian system and zebrafish are discussed in this mini-review to provide a glimpse into the relationship between Notch and Cdk5 that may explain certain neurodevelopmental defects associated with either mutations in ubiquitin ligase or altered expression of Cdk5.
Algorithms in medical decision-making and in everyday life: what’s the difference?
Authors: Chartash David , Bruno Michael A.
Published: February 2024

Algorithms are a ubiquitous part of modern life. Despite being a component of medicine since early efforts to deploy computers in medicine, clinicians’ resistance to using decision support and use algorithms to address cognitive biases has been limited. This resistance is not just limited to the use of algorithmic clinical decision support, but also evidence and stochastic reasoning and the implications of the forcing function of the electronic medical record. Physician resistance to algorithmic support in clinical decision making is in stark contrast to their general acceptance of algorithmic support in other aspects of life.
Thermal proficiency of magnetized and radiative cross-ternary hybrid nanofluid flow induced by a vertical cylinder
Authors: Al-Kouz Wael , Owhaib Wahib , Ayub Assad , Souayeh Basma , Hader Montasir , Homod Raad Z. , Muhammad Taseer , Ishak Anuar , Khan Umair
Published: February 2024

The ternary hybrid nanofluid leads to a significant enhancement in thermal performance applications like heat transfer in automotive engines, solar thermal energy storage, aerospace, and electronic cooling. The present study investigates the thermal characteristics of a ternary hybrid magnetized and radiated cross nanofluid comprising Al2O3, TiO2, and Ag nanoparticles in water subjected to combined convection flow around a vertical cylinder. Furthermore, innovative effects of the magnetic field, absorber surface of the cylinder, non-linear thermal radiations, and effective thermophysical characteristics of ternary nanofluid are taken, and a new model for heat transport is successfully achieved. The governing equations in the form of partial differential equations (PDEs) are obtained through Navier–Stokes and heat equations by applying current assumptions. The system of PDEs is converted into a set of ordinary differential equations (ODEs) via a similarity variable. The built-in code bvp4c in Matlab software further exercises the dimensionless ODE equations numerically. Adding multiple nanoparticles and the magnetic field effect enhances the heat transfer rate in the ternary hybrid cross nanofluid. The Weissenberg number reduces the velocity, the radiation parameter increases heat transport, and the increased volume friction of nanoparticles enhances thermal conductivity and rapid heat transport.
Isopointal intermetallics: the cP24, dca phases as a representative set of examples, along with their vacancy-ordered variants β-Mn and SrSi2
Authors: Janka Oliver , Pöttgen Rainer
Published: February 2024

The crystal-chemical relationship of the cubic Laves phase MgCu2 (space group F

d

3
‾

$d\overline{3}$

m, cF24) with the ternary phases Cd2Cu3In, Na2Au3Al, Mg2Rh3P, Li2Pd3B, Ag2Pd3S, Cu3Pt2B, Mo3Al2C, Mo3Ni2N, and V3Ga2N (subgroup P4132, cP24, dca) is discussed based on a group-subgroup scheme. The course of the lattice parameters and the free positional parameters show substantially different distortions and thus clear differences in chemical bonding, classifying these phases as isopointal rather than isotypic (usually they are all assigned to the Mo3Al2C type). The group-subgroup scheme further shows that the β-Mn and SrSi2 structures are vacancy-ordered variants of the cP24, dca phases. The structures of Mn3IrSi and LaIrSi (space group types P213; translationengleiche subgroups) are their ternary ordered versions.
Attention-Driven Modulation of Auditory Cortex Activity during Selective Listening in a Multispeaker Setting
Authors: Puschmann Sebastian , Regev Mor , Fakhar Kayson , Zatorre Robert J. , Thiel Christiane M.
Published: February 2024

Real-world listening settings often consist of multiple concurrent sound streams. To limit perceptual interference during selective listening, the auditory system segregates and filters the relevant sensory input. Previous work provided evidence that the auditory cortex is critically involved in this process and selectively gates attended input toward subsequent processing stages. We studied at which level of auditory cortex processing this filtering of attended information occurs using functional magnetic resonance imaging (fMRI) and a naturalistic selective listening task. Forty-five human listeners (of either sex) attended to one of two continuous speech streams, presented either concurrently or in isolation. Functional data were analyzed using an inter-subject analysis to assess stimulus-specific components of ongoing auditory cortex activity. Our results suggest that stimulus-related activity in the primary auditory cortex and the adjacent planum temporale are hardly affected by attention, whereas brain responses at higher stages of the auditory cortex processing hierarchy become progressively more selective for the attended input. Consistent with these findings, a complementary analysis of stimulus-driven functional connectivity further demonstrated that information on the to-be-ignored speech stream is shared between the primary auditory cortex and the planum temporale but largely fails to reach higher processing stages. Our findings suggest that the neural processing of ignored speech cannot be effectively suppressed at the level of early cortical processing of acoustic features but is gradually attenuated once the competing speech streams are fully segregated.
Nacc1 Mutation in Mice Models Rare Neurodevelopmental Disorder with Underlying Synaptic Dysfunction
Authors: Deehan Mark A. , Kothuis Josine M. , Sapp Ellen , Chase Kathryn , Ke Yuting , Seeley Connor , Iuliano Maria , Kim Emily , Kennington Lori , Miller Rachael , Boudi Adel , Shing Kai , Li Xueyi , Pfister Edith , Anaclet Christelle , Brodsky Michael , Kegel-Gleason Kimberly , Aronin Neil , DiFiglia Marian
Published: February 2024

A missense mutation in the transcription repressor Nucleus accumbens-associated 1 (NACC1) gene at c.892C>T (p.Arg298Trp) on chromosome 19 causes severe neurodevelopmental delay ( Schoch et al., 2017). To model this disorder, we engineered the first mouse model with the homologous mutation (Nacc1+/R284W) and examined mice from E17.5 to 8 months. Both genders had delayed weight gain, epileptiform discharges and altered power spectral distribution in cortical electroencephalogram, behavioral seizures, and marked hindlimb clasping; females displayed thigmotaxis in an open field. In the cortex, NACC1 long isoform, which harbors the mutation, increased from 3 to 6 months, whereas the short isoform, which is not present in humans and lacks aaR284 in mice, rose steadily from postnatal day (P) 7. Nuclear NACC1 immunoreactivity increased in cortical pyramidal neurons and parvalbumin containing interneurons but not in nuclei of astrocytes or oligodendroglia. Glial fibrillary acidic protein staining in astrocytic processes was diminished. RNA-seq of P14 mutant mice cortex revealed over 1,000 differentially expressed genes (DEGs). Glial transcripts were downregulated and synaptic genes upregulated. Top gene ontology terms from upregulated DEGs relate to postsynapse and ion channel function, while downregulated DEGs enriched for terms relating to metabolic function, mitochondria, and ribosomes. Levels of synaptic proteins were changed, but number and length of synaptic contacts were unaltered at 3 months. Homozygosity worsened some phenotypes including postnatal survival, weight gain delay, and increase in nuclear NACC1. This mouse model simulates a rare form of autism and will be indispensable for assessing pathophysiology and targets for therapeutic intervention.
IT Master Plan Menggunakan Metode Ward And Papperd Pada DINKOMINFO Cilacap
Authors: Setiawan Ito , Biantoro Dwikris , Waluyo Retno , Eksandi Priski Fajar
Published: February 2024

DINKOMINFO Cilacap memiliki bagian seperti urusan pemerintahan bidang sandi, bidang komunikasi dan informatika serta bidang statistik. Banyak sistem yang telah dibuat oleh DINKOMINFO Cilacap yang sudah dipakai di dinas-dinas terkait dan banyak juga permintaan pembuatan sistem dari dinas terkait untuk digunakan, namun permintaan sistem tersebut tidak melihat kemampuan sumber daya manusia yang akan menggunakan sistemnya serta melihat kebutuhan secara menyeluruh sehingga sistem yang diminta rata-rata berdiri sendiri tanpa ada integrasi sistem atau saling terkait antar sistem yang dibuat. Dari hal tersebut membuat kesulitan DINKOMINFO Cilacap dalam melakukan pengembangan sistem dikemudian hari. Permintaan untuk pengintergrasian sistem juga menjadi permasalahan tersendiri karena sebelumnya sistem tidak saling terkait dan membutuhkan waktu lama untuk proses tersebut. Merancang IT master plan pada DINKOMINFO Cilacap adalah tujuan dari penelitian ini. Metode yang digunakan pada penelitian ini mengacu metode ward and peppard yang mencangkup analisis PEST, SWOT, McFarland dan CSF. Hasil dari penelitian ini adalah usulan sistem yang sebaiknya diterapkan seperti implementasi smart city yang mencangkup  Smart Living,  Smart Environment,  Smart Economy,  Smart Mobilty,  Smart Government  dan  Smart People. Usulan yang lain seperti  Pengembangan e-pajak,  digitalilasi pemerintahan desa dan kecamatan, SI Penanggulangan Kemiskinan,  pengembangan smart kir,  pengembangan aplikasi kepegewaian terintergrasi, e-tiket,  e-commerce UMKM, pengembangan SIMBAJA,  pengembangan e-edukasi, e-bangunan, e-wisata,  e-lingkungan, e-transportasi,  pengembangan database center, pengembangan digitalisasi pelayanan publik dan pengembangan portal website pemerintahan.
Written cassation proceedings in domestic criminal procedure: application of law and perspectives for improvement
Authors: Kulchak L.S.
Published: February 2024

The article is dedicated to the examination of the issue of the institute of written cassation proceedings in domestic criminal procedure, its application of law, and perspectives for improvement. The advantages and disadvantages of conducting written proceedings are analyzed. The problematic aspects of implementing written proceedings in the cassation instance are discussed, and ways to improve the norms of criminal procedural legislation are proposed. These improvements aim to strengthen the legal stability of judicial decisions, procedural efficiency, the effective execution of criminal proceedings’ objectives, and ensuring the adequate protection of the rights of its participants.The introduction of the rule regarding the inclusion in domestic normative acts of the provision on assigning the jurisdiction of the court of cassation instance in criminal proceedings to decide on the form of cassation proceedings is reasonable. During the initiation of cassation proceedings, depending on the sufficiency of the materials for considering the cassation complaint present in the case, the court must appoint cassation review either in written proceedings or in a court session. However, if the court, choosing the written form of proceedings, concludes after studying the provided materials that they are insufficient for delivering a lawful and justified decision, it must issue a resolution for the case to be considered in a court session.Enhancing the norms of criminal procedural legislation in the proposed manner will contribute to strengthening the legal stability of judicial decisions, procedural economy, ensuring an adequate level of protection of the rights of its participants, and solidifying the definition of written proceedings through the review of court decisions among the main trends of amendments to the Criminal Procedure Code of Ukraine. This will foster an understanding of the significance and crucial importance of this institution in criminal proceedings.
Corporate secretary as subject of fiduciary duties
Authors: Heints R.M.
Published: February 2024

The article is devoted to the analysis of the legal status of the corporate secretary through the prism of the duties of the latter as a subject of fiduciary duties. It is emphasized that clarifying this issue is important because it depends on: 1) the possibility, and most importantly, the legality of terminating his powers without substantiating the grounds for such dismissal and on grounds not covered by Art. 36 of the Code of Labor Laws of Ukraine; 2) the possibility/impossibility of holding him accountable for actions that go beyond disciplinary, administrative or criminal offences.It is emphasized that, at the legislative level, the fiduciary duties of officials stem from the need to act: 1) in the interests of the company and within the scope of authority; 2) in such a way that, in his good faith belief, will contribute to the achievement of: a) the purpose of the company’s activity; b) successful results of the company’s activities for the benefit of all its shareholders as a whole, for which he must take into account: the possible consequences of his decisions in the long term; interests of company employees.The legal nature of fiduciary duties is analyzed. It is justified that although the corporate secretary is not directly related to the management bodies of the joint-stock company, the nature of his competence determines the special legal position of the corporate secretary. A fiduciary duty exists where one person, the owner, places a special hope or trust in and relies on another person, the fiduciary, while the fiduciary acts in his own discretion using his own experience.The author concludes that the corporate secretary is subject to fiduciary duties, as he implements on behalf of the company the latter’s duty to provide shareholders with information about the company; the corporate secretary is subject to the rules regarding the prohibition of competition (conflict of interests) and is obliged to act in the best interests of the company; is the bearer of the company’s confidential information.
Classification of grounds for termination of the right to lease land
Authors: Kysylytsia N.D.
Published: February 2024

The article is devoted to the classification of grounds for terminating the right to lease land. It has been established that there are many approaches to the classification of grounds for terminating the right to land. It was found that the predominant criteria for the classification of grounds for terminating land rights are the volitional orientation of the subjects of legal relations and their division into voluntary and forced ones. The classification of the grounds for terminating the right to lease land is also given, taking into account the sectoral affiliation of the relevant legal norms, and the land-legal: civil-legal, and environmental-legal grounds for terminating the right to lease land. It was established that the legal (actual) structure of the termination of the right to lease land contains a legal fact that is mandatory regardless of the reason for the termination of the right. The analysis of the legal (actual) structure of the termination of the land lease right was carried out, and their features in the context of the termination of the land lease right were clarified. In particular, it was established that the legal (actual) structure of the termination of the right to lease land are characterized by a sequential accumulation of elements, have a blanket character and are complete. The classification of terminating legal facts was carried out according to various criteria, such as the nature of the cause-and-effect relationship, depending on the functional purpose, depending on the behavior of the authorized person. The knowledge about the termination of the land lease right has been improved, in particular, the classification of grounds for the termination of the land lease right has been proposed, in accordance with the current legislation and the analysis of scientific works.
Optical Properties of Paper: Theory and Practice
Authors:   Department of Chemical Engineering and Applied Chemistry, University of Toronto,, Farnood Ramin
Published: February 2024

The perceived value of paper products depends not only upon their performance but also upon their visual appeal. The optical properties of paper, including whiteness, brightness, opacity, and gloss, affect its visual perception and appeal. From a practical point of view, it is important to quantify these optical properties by means of reliable and repeatable measurement methods, and furthermore, to relate these measured values to the structure of paper and characteristics of its constituents. This would allow papermakers to design new products with improved quality and reduced cost. In recent years, significant progress has been made in terms of the fundamental understanding of light-paper interaction and its effect on paper’s appearance. The introduction of digital imaging technology has led to the emergence of a new category of optical testing methods and has provided fresh insights into the relationship between paper’s structure and its optical properties. These developments were complemented by advances in the theoretical treatment of light propagation in paper. In particular, wave scattering theories in random media are ﬁnding increasing applicability in gaining a better understanding of the optical properties of paper. In this document, a review of these advancements is presented.
On the Importance of In-plane Shrinkage and Through-thickness Moisture Gradient during Drying on Cockling and Curling Phenomena
Authors:   University of Kuopio, Department of Physics, Lipponen P. , Erkkilä A. L. ,   Metso Paper, Inc., P.O. Box 587 FI-40101 Jyväskylä, Finland, Leppänen T. ,   University of Kuopio, Department of Physics, Hämäläinen J. ,   University of Kuopio, Department of Physics
Published: February 2024

Cockling and curling are unwanted phenomena that occur already in the manufacturing process and continue through the end use of paper due to moisture content changes. This paper compares the effects of different in-plane tensions and throughthickness drying proﬁles during the drying process on cockling and curling by means of ﬁnite element simulations. In this study, paper is treated as a heterogeneous orthotropic elasto-plastic material. The results predict that ﬁnding the optimal way to dry paper is not straightforward; it also depends on ﬁber orientation structure. On the other hand, defects in the ﬁber orientation structure of paper can be redressed at some level by drying the paper appropriately.
System Stability of the Open Draw Section and Paper Machine Runnability
Authors:   Fibre Science and Communication Network, and Department of Natural Sciences, Engineering and Mathematics, Mid Sweden University, Edvardsson S. , Uesaka T. ,   Fibre Science and Communication Network, and Department of Natural Sciences, Engineering and Mathematics, Mid Sweden University
Published: February 2024

The present work is concerned with the system dynamics and stability of the open draw sections of paper machines where web breaks occur most frequently. We have applied a novel particle based system dynamics model that allows the investigation of complex interactions between web property ﬂuctuations and system parameters, without any constraints of a particular geometrical web shape or boundary conditions assumed a priori. The result shows that, at a given machine draw and web property parameters, the open draw section maintains its steady-state until it reaches a certain machine speed limit. At this speed the system looses its stability and the web strain starts growing without any limit, and thus leading to a web break. A similar instability can also be triggered when web properties suddenly ﬂuctuate during steady-state operation. The parametric sensitivity studies indicate that, among the web property parameters studied, the elastic modulus of the wet web has the largest impact on the critical machine speed as well as on the detachment point where the web is released from the ﬁrst roll. Further analysis shows that the decrease in dryness has a (negative) synergistic effect causing an increased risk of system instability. It is, therefore, most important to control, not only average dryness, but also its variations in order to enhance paper machine runnability.
Varnos ir kranklio įvaizdis lietuvių ir slavų frazeologijoje bei etninėje kultūroje
Authors: Plachovičiūtė Diana
Published: February 2024

The aim of the article is to explore whether the image of the crow and raven in Lithuanian phraseology and ethnic culture is similar to that of its Slavic neighbors or exhibits distinctive characteristics. The research material includes phraseological units in Lithuanian, Polish, Belarusian, and Russian with the components crow and raven. The analysis encompasses phraseologisms found in both vernacular and literary sources, applying the theory of conventional figurative language and the comparative method. Special attention is given to the portrayal of crows and ravens in folklore and folk beliefs. The findings reveal a predominantly negative perception of both birds in Lithuanian and Slavic phraseology and ethnic culture. The main features of the image of a crow and raven, which have developed in Lithuanian and Slavic phraseology and ethnic culture, are based on such characteristics as: black feathers, predatory behaviour, an unpleasant voice (the cry is mythologized, and it is associated with misfortunes and death). The image of the crow is often ironic and comical, while the image of the raven is much more negative. The crow is a cultural symbol of foolishness, while the raven is associated with wisdom. However, both Lithuanian and Slavic phraseology have their own peculiar images of the crow and the raven.
Dynamic models for developing reference scenarios of energy system in the low-carbon transition
Authors:   General Energy Institute of National Academy of Sciences of Ukraine, 172, Antonovycha St., 03150, Kyiv, Ukraine, Denysov Viktor , Eutukhova Tatiana ,   General Energy Institute of National Academy of Sciences of Ukraine, 172, Antonovycha St., 03150, Kyiv, Ukraine
Published: February 2024

The proposed study is aimed at the development of dynamic input-output models in relation to energy development systems. The main task is to find optimal scenarios, defined as sequences of optimal balances between production and capital investment. These models are rooted in Leontief's conceptual concept of input-output, which emphasizes the timing of the introduction of new production systems. The article discusses the economic interpretation and mathematical conditions of intersectoral models, and examines their application to problems related to energy. The model uses the concept of balanced equilibrium growth, in which the ratio of consumption to net release is the same for all resources, and the reserve of at least one resource is fully utilized. The growth rate of the system is the most important parameter that determines the trajectory of balanced growth. Solving the system of inequalities yields balanced growth trajectories in which the dominant root and the associated vector of characteristics plays a key role. A balanced equilibrium growth rate has the properties of a minimax with the presence of a saddle point, which indicates its importance in achieving market equilibrium while preventing a reduction in inventories. The practical application of the model is described. The results of calculations of pessimistic, reference and optimistic scenarios of electricity production in the IPS of Ukraine are presented. Official statistical information and economic forecasts are used, and various restrictions are taken into account. The model aims to minimize the total cost of electricity generation while respecting environmental and operational constraints. The proposed model provides a comprehensive basis for understanding the dynamics of resource reserves, consumption and growth of electricity production of the IPS of Ukraine. It offers decision-makers a valuable tool to optimize electricity generation strategies, taking into account a range of scenarios and constraints, for the sustainable and cost-effective operation of the energy system. Keywords: Dynamic input-output models, optimal scenarios, balanced equilibrium growth, growth rate of the system.
Determination of the limit values of electric energy consumption using optimization modeling
Authors:   National Technical University of Ukraine ", Zamulko Anatolii ,   Igor Sikorsky Kyiv Polytechnic Institute",   , 37, Beresteiskyi Ave., Kyiv, 03056, Ukraine, Chernetska Yuliia ,   National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37, Beresteiskyi Ave., Kyiv, 03056, Ukraine, Prasol Anton ,   National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37, Beresteiskyi Ave., Kyiv, 03056, Ukraine
Published: February 2024

In the heating season of 2022/2023, as a result of the military aggression of the Russian Federation and targeted attacks on electric power facilities, a significant shortage of electric energy occurred in the Integrated power system of Ukraine. Restriction schedules and emergency disconnection of consumers were forcibly applied. In the conditions of such an unprecedented violation of the security of electricity supply, the problem of determining the limit values of electric energy and power consumption has gained new relevance for the electricity market participants. In this study, the problem of determining the optimal limit values of electricity consumption based on the criterion of maximum income from its sale to three groups of consumers was set and solved: "Critical infrastructure", "Households" and "Non-household consumers". The formation of the three specified groups is related to price discrimination in the electricity market and the need to supply critical infrastructure facilities without limits. The decision variables in the optimization model are proposed to be specified in fractions of the provision of electrical energy needs (unit fractions), which allows for establishing equal conditions regarding restrictions for all distribution system operators. To take into account the social significance of electric energy as a commodity, an additional constraint was included to the basic optimization model: the lower limit of the decision variable for the "Households" group. Approbation of the proposed optimization model was carried out using spreadsheet modeling in MS Excel on reported data on the results of electrical load measurements on regime days. The results of computational experiments are presented for the conditions of different values of the deficit of electric energy in the Integrated power system of Ukraine and different values of the additional constraint for the «Households» group, in particular, quantitative estimates of the consequences of the included constraints for the functioning of the electricity market. The proposed method of determining the limit values of electric energy consumption allows to formalize the procedure for decision-making according to predetermined rules and thereby achieve a fair distribution of limited resources. Keywords: electric energy consumption, shortage, limit value, optimization modelling, spreadsheet model.
Forecasting the output of coalproducts in thepost-warperiod in Ukraine
Authors:   General Energy Institute of National Academy of Sciences of Ukraine, 172, Antonovycha St., 03150, Kyiv, Ukraine, Makarov Vitalii
Published: February 2024

The purpose of the study is to adjust the previously developed forecasts of the development of the Ukrainian coal industry, as well as to determine the appropriate volumes of coal production for the energy sector and the country's economy as a whole. Due to the loss of all mines in Luhansk region and some mines in Donetsk region as a result of Russia's full-scale invasion of Ukraine, the forecast scenarios for the development of the coal industry of Ukraine for the period up to 2040 were adjusted. To adjust the forecast scenarios for the development of the coal industry, the software subsystem for forecasting coal production in Ukraine was used in the context of instability of the structure of the country's fuel bases arising from the effect of extraordinary force factors, in particular martial law, temporary occupation of the territory of Ukraine, and the. The software was created to enable a quick assessment of the impact of emergencies situations in the country on production volumes in the coal industry and to take them into account when developing forecasts of fuel supply to the economy and the country's energy balance as a whole. The software is created on the basis of databases detailing professional forecasts of the coal industry development by coal mining facilities, taking into account mining, geological, technological, economic and social features of coal mining enterprises, as well as possible scenarios of their technological re-equipment and optimization of production sites, and allows adjusting such forecasts by changing the expected production status of a mine in the event of force majeure. According to the adjusted scenarios, the volumes of coal production to meet the needs of the thermal power industry, metallurgical industry and other sectors of the economy for the period up to 2040 were determined. Keywords: coal industry, production, coal products, forecast, development, scenarios.
A new species of Catasetum (Cymbidieae: Catasetinae) from the Colombian Amazonia
Authors: Calderón Álvarez R. Alexis , Bonilla Morales Miguel M.
Published: February 2024

A new species, Catasetum caquetense from the Caquetá department of the Colombian Amazonia, is described and illustrated. Catasetum caquetense is morphologically distinct from similar species such as C. tuberculatum in its rectangular, entire, denticulate, prominent apiculate basal callus surrounded by inconspicuous crown-shaped protrusions with an extra callus towards the apex that partially narrows towards the mid-lip. Information about its distribution, ecology, habitat, and taxonomic comments on morphologically similar species is also provided. With this addition, the genus comprises eight species in the department of Caquetá.
Catasetum tavaresii (Catasetinae), a new species from Central Brazilian Amazon
Authors: Passos Krahl Dayse Raiane , Sena de Oliveira Miguel , Schmal Philippe , Chiron Guy , Batista Fernandes da Silva João , Krahl Amauri Herbert , Moreira da Silva de Almeida Sheylla Susan , De Castro Cantuária Patrick
Published: February 2024

A new Catasetum species from Brazilian Amazon, more specifically from the “Floresta Nacional de Saracá-Taquera” (State of Pará), is proposed, described and illustrated. This new taxon belongs to the subgenus Catasetum, section Isoceras, subsection Isoceras, whose representatives have symmetrical and parallel antennae. It is compared with C. nhamundaense, C. garnettianum and C. barbatum, all with the same antennae characteristics and belonging to the "C. cristatum alliance". Among related species, C. tavaresii differs mainly in the lip structure. We also give data on geographical distribution, habitat, phenology, flower visitors, and preliminary conservation status.
Analysis of the stress state at the contours of underground horizontal workings of elliptical cross-section shape subjected to all-round uniform pressure
Authors: Ponomarev A. B. , Bogomolova O. A. , Ushakov A. N.
Published: February 2024

The results of the research to determine the stress state on the contours of underground horizontal excavations, the cross-section of which has the form of an ellipse of any size and shape are presented. When changing the intensity of tensile uniform pressure applied to the points of elliptical shape cross-section excavation contours, the given values of excavation depths, ellipse parameters and rock side spreading coefficient values, the areas of the contours with tensile and compressive stresses are identified. If the depths of workings of the considered form of cross-section change, the areas where tensile and compressive stresses act at given values of the intensity of tensile uniform pressure applied to the points of working's contours, ellipse parameters and values of the coefficient of rock lateral spreading are highlighted. The graphical images of the normal tangential stresses, acting on the contours of the considered workings are given. The ranges of intensity of the tensile uniform pressure, at which, depending on the depth of excavation, values of ellipse parameters and the coefficient of rock lateral spread, tensile and (or) compressive stresses act in the points of excavation contours have been determined. The given relations and results can be applied to calculate the values of the permissible values of all-round uniform pressure in the points of the workings contours and to determine the permissible depths of their embedding. As a criterion for determining the values of these values, the condition of absente on the contours of excavations of points in which the normal tangential stresses exceed the limits of tensile and compression strength of the rock can be accepted.
Solution of filtration problems of construction geotechnology in thin water layers
Authors: Sologaev V. I.
Published: February 2024

Filtration problems of construction geotechnics during water movement in thin permeable layers of soils and artificial materials are considered. Under such conditions, traditional approaches borrowed from classical hydrogeology give errors. This is due to the fact that under normal conditions of underground aquifers of a sufficiently large depth, in hydrogeological practice, the hydraulic theory of filtration is used, in which the velocities of filtration currents are averaged along the vertical coordinate. The original nonlinear differential equations of filtration flows are subjected to forced linearization by one or another known method. In this case, the method of linearization by introducing the average power (depth) of the filtration flow is widely used. This method was originally developed for aquifers of great depth. In the presented work, an attempt was made to abandon such a linearization and solve some of the problems of unsteady filtration flows in thin aquifers, which are characteristic of building geotechnics, with obtaining analytical solutions of the final form without introducing artificial simplifications. A methodology is proposed for combining analytical and numerical methods in the process of finding solutions to filtration problems of construction geotechnics with obtaining self-similar dependencies. This approach will make it possible to avoid linearization errors and carry out filtration calculations in thin permeable layers of soils and artificial materials more accurately. A review of domestic and foreign scientific publications on the topic of research has shown some stagnation in this direction. The comparison revealed that in thin permeable layers of soils and artificial materials, preference can be given to filtration calculations using the presented method, since it more accurately describes the non-stationary movement of water in construction geotechnics.
Training sample balancing to train artificial neural networks for geotechnical problems
Authors: Ofrikhter I. V. , Ponomaryov A. B.
Published: February 2024

This paper deals with the issue of balancing the training sample for training artificial neural networks when solving geotechnical problems. As an example problem, the prediction of mechanical characteristics of soil based on physical parameters is considered. A multi-layer full-connection artificial neural network was used to build the dependence. The need to improve the accuracy of analytical calculation methods for geotechnical problems is constant. Recently, such a regressor as an artificial neural network has been used more and more often for geotechnical problems. Neural networks are a powerful forecasting tool that allows reproducing dependencies of almost unlimited complexity. As neural networks need to be trained on a ready set of data, there is a question of quality of geotechnical test databases that are used for training. Due to the fact that there is no centralized way to collect geotechnical test data electronically, many researchers encounter significant incompleteness and imbalance in the data when attempting to collect such data. This paper proposes a solution for balancing such a training sample by generating examples of minority classes. It is proposed to balance the sample by generating missing examples with random parameter values within a certain range. The output data is proposed to be obtained with the help of existing calculation methods. This approach made it possible to make the training sample evenly distributed over the entire available range of values. At the same time, the range of predicted values increased in accordance with the limits of the experimental and generated sample. In addition, this approach allows us to take into account the existing analytical calculation methods when training neural networks.
ADVANCED ULTRAWIDEBAND PATCH ANTENNA FOR WEARABLE AND WBAN APPLICATIONS
Authors: Chaudhury Raaunak , Dutta Bimal Raj
Published: February 2024

Present communication devices are adopting an application-centric approach with the integration of electronic gadgets into wearable accessories in recent years. This paper presents a wearable antenna with a flexible textile substrate. The design comprises a low-profile, textile-based UWB (3.1-10.6 GHz) antenna of 25 × 20 × 1 mm3 size with a defected ground structure. Design antenna performance characteristics have been simulated in Computer Simulation Technology studio. It offers a gain of 4.204 dBi at 5.11 GHz frequency and 2.993 dBi at 7.39 GHz frequency using a cotton substrate with a 1.6 dielectric constant. A simulated testing of the design antenna on a human body phantom has resulted in a gain of 0.697 dBi with a return loss of -30.863dB and 1.058 VSWR at 5.3125 GHz frequency. A specific absorption rate value of 1.64 W/kg of the designed antenna for 10 g tissue shows that it is safe for the human body. The patch antenna of the paper is promising for wearable, medical imaging, tumor detection, and other wireless body area network (WBAN) biomedical applications.
Psychological Determinants of Conflicts in Interpersonal Communication
Authors: Mityaeva Anna , Valuikova Vera
Published: February 2024

The article considers the concept of "conflict" from the point of view of socio-psychological analysis. Conflict is understood as an inevitable phenomenon of interpersonal relations in society. The article describes the socio-psychological prerequisites for the emergence of interpersonal conflicts in communication. The emergence of conflict situations in the process of communication is influenced by various factors: objective and subjective ones. In terms of socio-psychological analysis of the conflicts’ emergence in interpersonal communication, it is of interest to reveal the essence of the concept “personal conflict” as an integrative personal property that indicates an increased tendency to conflict behavior. Interpersonal communication is diverse, as the goals of its participants are. At the same time, it is interesting that in the process of communication the goals of the participants are realized and the process of communication itself can act as a goal in itself. The personality plays an important role in the course of conflict confrontation, as well as its value orientations, and features of the motivational-need sphere. The spheres of manifestation of interpersonal conflicts are extremely diverse. These are conflicts in the family, in professional activities between employees or management, conflicts among schoolchildren and adolescents. You can continue indefinitely. All these types of conflicts are united by the each of the parties’ desire to prove their case, to defend their interests and goals, to a greater extent to the detriment of the interests of the opposite side. The functions of interpersonal conflicts are dual in nature. The destructive role of conflicts that arise in interpersonal communication stands out most clearly: they reduce the effectiveness of the activities performed, contribute to the deterioration of the socio-psychological climate and the emergence of various kinds of emotional problems. The causes of conflicts in communication are mostly psychological in nature. Personality and its individual characteristics play an important role in the conflict. The study of such a characteristic as a person’s conflict nature allows a deeper understanding of the conflict behavior emergence nature, to identify patterns of conflict response. In this regard, it is relevant to consider the psychological foundations of conflict management.