bluuebunny/crossref_metadata_2025 huggingface dataset:
Minnesotaite Fe2+3[(OH)2/Si4O10] – Fayalite and Ferrohortonolite Substitution Product in Plagiogranites of Castel Mountain. Mesozoids оf Mountain Crimea
Authors: Спиридонов Э.М. , Путинцева Е.В.
Published: April 2024

Описан миннесотаит Fe2+ 3 [(OH)2 /Si4 O10] из кайм замещения феррогортонолита и фаялита в плагиогранитах горы Кастель, мезозоиды Горного Крыма. Миннесотаит в шлифе в проходящем свете зеленого цвета, при скрещенных николях напоминает тальк. Химический состав минерала (микрозондовый анализ), мас.%: SiO2 50.60, FeO 43.41, MnO 1.20, MgO 0.51, сумма 95.72%, что отвечает формуле (Fe2+ 2.87Mn2+ 0.08Mg0.06)3.01[Si4 O10](OH)2 . Описанный миннесотаит – продукт низкотемпературной послемагматической гидратации феррогортонолита и фаялита.

Minnesotaite Fe2+3[(OH)2/Si4O10] from ferrohortonolite and fayalite substitution margins in Castel Mountain plagiogranites of Mountain Crimean mesozoids is described. In thin section minnesotaite is green in transmitted light and has a look of talk in reflected light. The chemical composition of the mineral is (microprobe analysis), wt. %: SiO2 50.60; FeO 43.41; MnO 1.20; MgO 0.51; sum. 95.72%, which corresponds to (Fe2+2.87Mn2+0.08Mg0.06)3.01[Si4O10](OH)2. The described minnesotaite is a product of low-temperature post-magmatic hydration of ferrohortonolite and fayalite.
Practical Use of Sarcophaga dashwoodia (Aneust, 1775) in Estimating the Post-Mortem Interval on Rural Areas of Europe
Authors:   Middleton Institute of Forensic Science, Sussex, UK, M Ferrars , C Brandon ,   University of Delaford, Exeter, Devonshire, UK, V Nabokov ,   National Institute of Criminology, Moscow, Russia, HP Lovecraft ,   Middleton Institute of Forensic Science, Sussex, UK
Published: April 2024

Sarcophaga dashwoodia (Aneust, 1775) is a widespread species of the flesh-fly family Sarcophagidae; these flies inhabit most of the grasslands and peripheral woods of Europe. Many species of the Sarcophagidae family, including S. dashwoodia, have been identified as rapid colonizers of animal corpses in rural areas. In forensic science, when it comes to the estimation of the Postmortem Interval, these types of insects are really useful. We examined the abundance of this species in six domestic goat corpses (Rigober tabandini) in rural areas of the county of Devonshire (UK) and Лися-Гура (Russia). The results show a high colonization of corpses by S. dashwoodia accompanied by other secondary necrophagous species. Therefore, we propose S. dashwoodia as a valuable tool for determining the PMI in forensic research.
Determination of Firing Distance based on Pellet Dispersion
Authors:   Hellenic Police, Firearm & Toolmark Examiner, Greece, A Kostorrizos , C Spiliopoulou ,   Department of Forensic Medicine and Toxicology, School of Medicine, University of Athens, Greece, K Moraitis ,   Department of Forensic Medicine and Toxicology, School of Medicine, University of Athens, Greece, S Papadodima ,   Department of Forensic Medicine and Toxicology, School of Medicine, University of Athens, Greece
Published: April 2024

According to literature, practice and experience, the firing distance from shotguns (i.e., the distance between the victim and the muzzle of the gun) can be determined fairly accurately by studying and evaluating the pellet dispersion pattern after shooting a target surface, either on clothing or on the victim’s body. Many formulas have been published in order to determine the range at which a shotgun has been discharged, as well as the parameters that affect the calculation of the estimated firing distance. Τhe purpose of the current study was to provide answers to questions regarding firing distance ranges, by firing 12-gauge shotguns from 10, 18 and 25 meters, using different sizes of barrel choke and pellet sizes. Experimental shots were fired from two different guns, with different technical characteristics, from different distances and with different types of shotshell charges. The research revealed that 65% to 80% of the pellet pattern is distributed evenly in the center of the shot and this percentage remains the same at all three distances (10, 18 and 25 meters). Also, an important term in research is Shotgun Pellet Pattern (SPP), which is based on the number of pellets that are uniformly imprinted in the center of the shot and is an important factor in determining shot distance. The results of the shootings were recorded in tables and integrated into a computer program, giving useful information to the case examiner regarding the ability to determine the firing distance from a shotgun.
Review of Post-Operative Rehabilitation Protocols Following Ankle Lateral Collateral Ligament Repair in Adults
Authors:   ¹East Sussex Healthcare NHS Trust, UK, Apostolides Michael , Mazin Al-Janabi Mina ,   Princess Alexandra Hospitals NHS Trust, UK, Southgate Crispin ,   East Kent Hospitals University NHS Foundation Trust, UK, Dhinsa Baljinder Singh ,   East Kent Hospitals University NHS Foundation Trust, UK
Published: April 2024

Ankle sprains are very common injuries and are usually managed non-operatively. With poor rehabilitation, 20% of ankle sprains may develop chronic instability, which often necessitates surgical intervention. Rehabilitation after such procedures is focused on regaining the function of the ankle while keeping a stable joint. Post-operative rehabilitation and weight-bearing status varies greatly among surgeons. Our aim is to review the existing most recent literature that investigates post-operative outcomes following different rehabilitation protocols in patients with Chronic Lateral Ankle Instability (CLAI). We performed a literature search from 2002 to 2022, through Medline/Pubmed databases using the terms ‘ankle lateral ligament’, ‘repair’, ‘reconstruction’ and ‘post-operative rehabilitation’. A gray literature search was also performed using the Google Scholar search engine. Studies that described post-operative rehabilitation protocols following CLAI surgery were included. 25 studies with 1045 patients describing rehabilitation protocols following repair/reconstruction of CLAI were included. Most studies used the Broström procedure or modification of it. In 82% of cases patients were immobilised in a cast from day 1 post-operatively for two weeks and were kept non-weight-bearing in 64% during the same time. A boot or brace was kept up to 6 weeks in 82%. Full weight-bearing was recommended either at the very start following surgery (32%), or after four weeks from surgery (36%). Early range of movement exercises started after week 2, with muscle strengthening, proprioception, and balance between week 2 and 6. Return to sports is usually between 2-4 months. In conclusion, post-operative rehabilitation protocols following CLAI surgery vary considerably. We attempted to quantify the studies that provide enough information on this subject and create a post-operative rehabilitation protocol following anatomic repair/reconstruction for CLAI.
Current Advances in Regenerative Medicine for Articular Cartilage Injury: Progress and Market Trends
Authors:   Iranian Tissue Bank and Research Center, Tehran University of Medical Sciences, Tehran, Iran, Arabpour Zohreh , Parvizpour Farzad ,   Department of Molecular Medicine, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran, Moradi Maryam ,   School of Medicine, Iran University of Medical Sciences, Tehran, Iran, Zargarzadeh Nikan ,   School of Medicine, Tehran University of Medical Sciences, Tehran, Iran, Nazari Mahnaz ,   Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran, Rashnavadi Heewa ,   School of Medicine, Tehran University of Medical Sciences, Tehran, Iran, Dehghani Sanaz ,   Iranian Tissue Bank and Research Center, Tehran University of Medical Sciences, Tehran, Iran, Latifi Marzieh ,   Organ Procurement Unit, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran, Jafarian Arefeh ,   Iranian Tissue Bank and Research Center, Tehran University of Medical Sciences, Tehran, Iran
Published: April 2024

Today, treatments of cartilage and osteochondral lesions are routine clinical procedures. Treatment of large Articular Cartilage (AC) defects is technically difficult and complex, often accompanied by failure. Articular cartilage is a highly specialized connective tissue with limited ability to repair itself after injury due to a lack of blood vessels, lymph, and nerves. Therefore, without sufficient and potent intervention, cartilage lesions can easily lead to progressive tissue degeneration, disabling joint pain, and eventually the degenerative disease, Osteoarthritis (OA). Various treatments for cartilage regeneration have shown encouraging results, but unfortunately, none of them have been the perfect solution. New minimally invasive and effective techniques are being developed. The development of tissue engineering technology has created strong promise to engineer or regenerate functional and healthy articular cartilage. In this technology, potential stem cell sources are mainly supplied with pluripotent stem cells and mesenchymal stem cells from various sources. In the meantime, some such as BioSeed®-C and NOVOCART® have been marketed. In this review, the common techniques of articular cartilage reconstruction and the clinical application of articular cartilage tissue engineering are described in detail.
Adenomyomatosis Looks Like a Pearl Necklace
Authors:   Resident Doctor in Radiology Emergency Department of Radiology Hospital Avicenne Rabat Morocco, KN Raissa Albertine , L Fatimzahra ,   Assistant Professor Specialist in Radiology, Radiology Emergency Department at Avicenne Rabat Morocco Hospital, Morocco, L Jerondi ,   Professor Head of the Radiology Department Radiology Emergency Department Avicenne Hospital Rabat Morocco
Published: April 2024

Focal and diffuse thickening of the gallbladder, Benign and noninflammatory pathology. Gallbladder adenomyomatosis is a benign alteration of the gallbladder wall characterized by excessive epithelial proliferation associated with muscle hyperplasia, resulting in thickening of the gallbladder wall. Excessive epithelial proliferation leads to epithelial folding in the underlying muscle layer with the subsequent formation of diverticular pockets lined with epithelium, the Rokitansky-Aschoff sinuses (SRA).
Mannose Presenting ‘Glyco-Colicins’ Convert the Bacterial Cell Surface into a Multivalent Adsorption Site for Adherent Bacteria
Authors: Hatton Natasha , Nabarro Joe , Yates Nicholas , Parkin Alison , Wilson Laurence , Baumann Christoph , Fascione Martin
Published: April 2024

Biofilm formation is integral to the pathogenesis of numerous adherent bacteria and contributes to antimicrobial resistance (AMR). The rising threat of AMR means the need to develop novel non-bactericidal anti-adhesion approaches against such bacteria is more urgent than ever. Both adherent invasive Eschericia coli (AIEC, implicated in inflammatory bowel disease) and uropathogenic E. coli (UPEC, responsible for ~80% of urinary tract infections) adhere to terminal mannose sugars on epithelial glycoproteins through the FimH adhesin on their type 1 pilus. Although mannose-based inhibitors have previously been explored to inhibit binding of adherent bacteria to epithelial cells, this approach has been limited by monovalent carbohydrate-protein interactions. Herein we pioneer a novel approach to this problem through the preparation of colicin E9 bioconjugates that bind to the abundant BtuB receptor in the outer membrane of bacteria, enabling multivalent presentation of functional motifs on the cell surface. We show these bioconjugates label the surface of live E. coli, and furthermore demonstrate that mannose presenting “glyco-colicins” induce E. coli aggregation, using the bacteria itself as a multivalent platform for mannose display which triggers binding to adjacent FimH presenting bacteria.
A Configurationally Stable Indenofluorene-Based Helical Diradicaloid
Authors: Martínez-Pinel Álvaro , Lezama Luis , Cuerva Juan M. , Casares Raquel , Blanco Víctor , Cruz Carlos M. , Millán Alba
Published: April 2024

The synthesis and the optoelectronic, magnetic and chiroptical properties of a helically chiral diradicaloid have been reported. Dibenzoindeno[2,1-c]fluorene, the simplest configurationally stable chiral derivative of the family of the indenofluorenes, shows a low HOMO-LUMO gap and a moderate singlet-triplet gap. Enantiomers have been isolated and are configurationally stable. Electronic circular dichroism has been measured and dissymmetry factor calculated. Our experimental findings are supported by DFT calculations.
Sustainable and Surfactant-Free Synthesis of Negatively Charged Acrylamide Nanogels for Biomedical Applications
Authors: Mazzali Davide , Rath Gabriela , Röntgen Alexander , Roy Chowdhury Vaidehi , Vendruscolo Michele , Resmini Marina
Published: April 2024

Nanogels offer unique advantages, like high surface-to-volume ratio, scalable synthetic methods and easily tailored formulations, that allow to control size and introduce stimuli-responsive properties. Their potential for drug delivery is significant due to their biocompatibility, high drug loading capacity, and controlled and sustained drug release, but the development of greener and sustainable processes, in particular the replacement of organic solvents with water, is essential for large-scale applications. Here we report our results on the synthesis in water of covalently crosslinked acrylamide-based nanogels, both neutral and negatively charged, with varying amounts of acryloyl-L-proline, using a high-dilution radical polymerization technique without the need for surfactants. The use of a water-based synthesis resulted in nanogels with high monomer conversions and chemical yields, as well as lower polydispersity and smaller particle sizes for the negatively charged nanogels. This results in a more efficient synthetic methodology, with reduced loss of starting materials, higher potential for scalability and reduction in costs. The suitability of these nanogels for biomedical applications was supported by cytotoxicity studies showing no significant reduction in viability on a human neuroblastoma cell line.
Valoración de estrategia para el afianzamiento del aprendizaje de Coriolis tridimensional en estudiantes de la asignatura de Dinámica
Authors: Betancur Montoya Gabriela , Marin Urrego Leidy Tatiana , Restrepo Martinez Alejandro , Álvarez Gil Laura Carolina
Published: April 2024

Normalmente, la aceleración en Coriolis tridimensional es uno de los temas que genera más retos para los estudiantes Ingeniería Mecánica. Este artículo plantea una estrategia que permite mejorar el proceso de aprendizaje de Coriolis 3D. La estrategia cuenta con los siguientes pasos: En la primera etapa se realiza un aporte conceptual que facilita entendimiento del ejercicio planteado; en el segundo paso desarrolla matemáticamente el ejercicio  propuesto, para lo cual se usa de la derivada de un vector con respecto al tiempo, medido en relación en un sistema trasladante-rotatorio; en el tercer paso se programa y analiza el ejercicio, como resultado se presenta la incidencia de la velocidad angular en la aceleración de Coriolis, la cual afecta la magnitud total de la aceleración.  El cuarto paso realiza una encuesta que mide la percepción del estudiante y cuestionarios de valoración del desempeño real, los cuales fueron aplicados a dos grupos de estudiantes de la asignatura de Dinámica de la Universidad Nacional de Colombia, Sede Medellín.  En el estudio se dividieron los grupos así:  un conjunto de estudiantes con acceso a material complementario y grupo de control. Se evidenció que quienes leyeron el artículo tuvieron un mejor desempeño. Finalmente, la encuesta y su revisión permitió hacer cambios en la clase presencial lo cual ayudó en la presentación y el entendimiento de los conceptos asociados al problema trabajado.
Propuesta para capacitar a tutores de los centros de desarrollo de software de la Universidad de las Ciencias Informáticas de Cuba
Authors: Estrada Molina Odiel
Published: April 2024

Se presenta una propuesta de capacitación orientada a preparar a los tutores de los Centros de Desarrollo de Software de la Universidad de las Ciencias Informáticas para que puedan consolidar en sus estudiantes la habilidad de modelar en Ingeniería de Software. Se explica la estructura didáctica y metodológica de cada uno de los talleres que se proponen, sirviendo de guía a los encargados de efectuar la capacitación. La validación de la propuesta se realizó mediante una consulta a especialistas (total 10) en la se concluye que es efectiva al cumplir con los requisitos de factibilidad, aplicabilidad, generalidad, pertinencia, originalidad y validez.
Geotechnical centrifuge applications in the teaching of applied soil mechanics
Authors: Lozada López Catalina , Garzón Lina Ximena , Campagnoli Sandra Ximena
Published: April 2024

This paper presents the characteristics of the new geotechnical centrifuge of the Escuela Colombiana de Ingeniería Julio Garavito, including the installed capacities, future applications, and possibilities that offer the new centrifuge as an important tool for teaching and learning in geotechnics. This centrifuge has a radio of 610mm and a maximum acceleration of 200 gravities. A very complete acquisition system with a capacity of 12 sensors to measure different properties is installed.  Also, the centrifuge has five oedometric consolidometers as a complementary tool to prepared fine soils in the construction boxes. The possibilities in teaching soil mechanics and applied soil mechanics using the new centrifuge are multiple and are based on the visualization of failure surfaces and deformations produced by different geotechnical structures.
Perfect Fluid with Heat Flow in f(T) Theory of Gravity
Authors: Pawar D.D. , Ghungarwar N.G. , Gaikwad P.S.
Published: April 2024

Bianchi Type-I cosmological models have been a subject of extensive research in cosmology due to their simplicity and relevance in understanding the dynamics of the early Universe. In this study, we investigate the dynamics of such models within the framework of f(T) gravity, an alternative theory of gravity that extends teleparallel gravity by introducing a general function of the torsion scalar, T. We focus on the presence of a perfect fluid with heat flow in the cosmic medium. By solving the field equations of f(T) gravity, we obtain exact solutions for the Bianchi Type-I cosmological models. These solutions provide valuable insights into the evolution of the Universe and how it is influenced by the modified gravity theory. Furthermore, we derive cosmological parameters in terms of redshift, offering a convenient way to interpret observational data and connect theoretical predictions to empirical measurements. Our findings not only contribute to a deeper understanding of the dynamics of Bianchi Type-I cosmological models but also  provide a foundation for comparing f(T) gravity with standard general relativity in the context of observational cosmology. This research paves the way for further exploration of alternative gravity theories and their implications for the early Universe’s evolution and structure.
A Numerical Study on the MHD Ternary Hybrid Nanofluid (Cu-Al2O3-TiO2/H2O) in presence of Thermal Stratification and Radiation across a Vertically Stretching Cylinder in a Porous Medium
Authors: Nath Rupam Shankar , Deka Rudra Kanta
Published: April 2024

The primary objective of this study is to investigate the influence of thermal stratification on the magnetohydrodynamics (MHD) flow of water-based nano, hybrid, and ternary hybrid nanofluids, as they pass a vertically stretching cylinder within a porous media. The nanoparticles Cu, Al2O3, and TiO2 are suspended in a base fluid H2O, leading to the formation of a ternary hybrid nanofluid (Cu + Al2O3 + TiO2/H2O). The use of a relevant similarity variable has been utilized to simplify the boundary layer equations which control the flow and transform the coupled nonlinear partial differential equations into a collection of nonlinear ordinary differential equations. The numerical results are calculated with the 3-stage Lobatto IIIa approach, specifically implemented by Bvp4c in MATLAB. This study presents a graphical and numerical analysis of the effects of various non-dimensional parameters, such as the Prandtl number, radiation parameter, heat source/sink parameter, magnetic parameter, porosity parameter, curvature parameter, thermal stratification parameter, and thermal buoyancy parameter, on the velocity, temperature, skin-friction coefficient, and Nusselt number. The impacts of these parameters are visually depicted through graphs and quantitatively represented in tables. The ternary hybrid nanofluid has a higher heat transfer rate than the hybrid nanofluid, and the hybrid nanofluids has a higher heat transfer rate than ordinary nanofluids.
Study of Structural and Electronic Properties of CsMgCl3 Compound
Authors: Kumar Aman , Gupta Harshit , Kumar Dev , Sharma Ritu , Kumar Anuj , Sharma Subodh Kumar , Singh Aman Pal
Published: April 2024

In this report, we have investigated the CsMgCl3 compound with the help of the WIEN2K software package. The structural and electronic properties are performed using the full potential augmented plane wave (FP-LAPW) method with the generalised gradient approximation (GGA) approximation as exchange correlation potentials. We used the Birch-Murnaghan equation (BME) to find the structural properties of the material. These include the lattice parameter, the bulk modulus, the first derivative of the bulk modulus, the minimum energy, and the volume. The structural properties match up with the experimental data. Electronic properties in terms of the band structure (BS) and total and partial density of state (T-DOS and P-DOS) profiles of CsMgCl3 using GGA potentials exhibit an indirect wide energy band gap of 5.35 eV. All these properties show that the CsMgCl3 compound is used as a perovskite in solar cells.
Spectra of Ultrasound Doppler Response Using Plane-Wave Compounding Technique
Authors: Barannik Evgen A. , Hrytsenko Mykhailo O.
Published: April 2024

Within the framework of a simple model of the sensitivity function, the Doppler spectra are considered for different ways of generating response signals using plane wave compounding. A Doppler spectrum is obtained for coherent compounding of signals received at different steering angles of waves during their period of changing. Compared to traditional diagnostic systems, the Doppler spectrum width is increased only by limiting the duration of the signals. There is no additional increase in the spectrum width if the compound signals are formed by adding with cyclic permutation, in which signals from each new wave angle are compounded. When a Doppler signal is formed directly from Doppler signals at different steering angles, the spectral width increases both in comparison with the traditional method of sensing with stationary focused ultrasound fields and with the case of coherent signal compouding. The obtained increase in the spectral width has an intrinsic physical meaning. The increase in width is connected with a dynamic change in the Doppler angle, which increases the interval of apparent projections of the velocities of motion of inhomogeneities along the direction of transmitting of a plane wave without inclination.
FR/ASimJava: a federated approach to parallel and distributed network simulation in practice
Authors: Sikora Andrzej , Niewiadomska-Szynkiewicz Ewa
Published: April 2024

The paper addresses issues associated with the application of federations of parallel/distributed simulators to large scale networks simulation. We discuss two principal paradigms for constructing simulations today. Particular attention is paid to an approach for federating parallel/distributed simulators. We describe the design and performance of frame relay network simulator (FR/ASimJava) implemented based on a Java-based library for distributed simulation – ASimJava. Six practical examples – six networks operating under frame relay – are presented to illustrate the operation of the given software tool. The focus is on the efficiency of presented network simulator.
Distributed, asynchronous algorithms for network control with contracted flow rates – a review
Authors: Karbowski Andrzej
Published: April 2024

The paper reviews current algorithms for distributed, asynchronous control of networks when the customer is guaranteed to get some predetermined (e.g., as a part of a service level agreement – SLA) values of flow. Two cases are considered – both with single and multiple commodity. It is assumed, that the flow cost functions are convex with special attention devoted to linear and strictly convex cases
Developing a Ring-Based Optical Network Structure with Glass-Through Nodes
Authors: Caserta Marco , Schwarze Silvia , Voß Stefan
Published: April 2024

An important issue in designing optical transport networks (OTN) is security. The concept of 1+1 protection requires to connect each origin-destination(OD)-pair by at least two node-disjoint paths. In the case of a single edge or node failure, the connection of all OD-pairs is maintained under 1+1 protection. On a ring, 1+1 protection is given naturally. Moreover, on rings, the routing effort is typically decreasing. These observations motivate the investigation of ring structures for OTN. When developing a ring structure for telecommunication networks, several subtasks can be identified. Ringshave to be designed, OD-pairs have to be assigned to rings, communication among rings has to be defined, a proper flow routing has to be chosen, and rings have to be dimensioned regarding flow capacity. In this paper, we address the first two issues, namely generation of rings and assignment of OD-pairs to rings. Our approach allows to distinguish active and non-active (glass-through) nodes in OTN. Active nodes are equipped with active routing hardware that weakens the optical signal and has impact on feasible ring lengths. Non-active nodes do not influence the optical signal. Although a consideration of active/non-active nodes is important in ring design, only a few references address this issue. We propose an algorithm for generating random ring candidates. Moreover, we present a mathematical model for the assignment of OD-pairs to rings subject to a feasible choice of active nodes. We test our methods using a case of Deutsche Telekom.
RTT+ – Time Validity Constraints in RTT Language
Authors: Felkner Anna , Kozakiewicz Adam
Published: April 2024

Most of the traditional access control models, like mandatory, discretionary and role based access control make authorization decisions based on the identity, or the role of the requester, who must be known to the resource owner. Thus, they may be suitable for centralized systems but not for decentralized environments, where the requester and service provider or resource owner are often unknown to each other. To overcome the shortcomings of traditional access control models, trust management models have been presented. The topic of this paper is three different semantics (set-theoretic, operational, and logic- programming) of RTT , language from the family of role-based trust management languages (RT). RT is used for representing security policies and credentials in decentralized, distributed access control systems. A credential provides information about the privileges of users and the security policies issued by one or more trusted authorities. The set-theoretic semantics maps roles to a set of sets of entity names. Members of such a set must cooperate in order to satisfy the role. In the case of logic-programming semantics, the credentials are translated into a logic program. In the operational semantics the credentials can be established using a simple set of inference rules. It turns out to be fundamental mainly in large- scale distributed systems, where users have only partial view of their execution context. The core part of this paper is the introduction of time validity constraints to show how that can make RTT language more realistic. The new language, named RTT+ takes time validity constraints into account. The semantics for RTT+ language will also be shown. Inference system will be introduced not just for specific moment but also for time intervals. It will evaluate maximal time validity, when it is possible to derive the credential from the set of available credentials. The soundness and completeness of the inference systems with the time validity constraints with respect to the set-theoretic semantics of RTT+ will be proven.
Application of Social Network Analysis to the Investigation of Interpersonal Connections
Authors: Mincer Marcin , Niewiadomska-Szynkiewicz Ewa
Published: April 2024

Social network analysis (SNA) is an important and valuable tool for knowledge extraction from massive and unstructured data. Social network provides a powerful abstraction of the structure and dynamics of diverse kinds of interpersonal connection and interaction. In this paper, we address issues associated with the application of SNA to the investigation and analysis of social relationships of people. We provide a brief introduction to representation and analysis of social networks, SNA models and methods. The main objective is to investigate the application of SNA techniques to data mining in case of two social networks Facebook and Twitter. The presented simulations illustrate how social analysis can be used to determine the interpersonal connections, importance of actors in a given social network and detect communities of people. We then discuss strength and weakness of SNA techniques.
A Survey of Energy Efficient Security Architectures and Protocols for Wireless Sensor Networks
Authors: Daniluk Krzysztof , Niewiadomska-Szynkiewicz Ewa
Published: April 2024

Data security and energy aware communication are key aspects in design of modern ad hoc networks. In this paper we investigate issues associated with the development of secure IEEE 802.15.4 based wireless sensor networks (WSNs) – a special type of ad hoc networks. We focus on energy aware security architectures and protocols for use in WSNs. To give the motivation behind energy efficient secure networks, first, the security requirements of wireless sensor networks are presented and the relationships between network security and network lifetime limited by often insufficient resources of network nodes are explained. Second, a short literature survey of energy aware security solutions for use in WSNs is presented.
How the Role-Based Trust Management Can Be Applied to Wireless Sensor Networks
Authors: Felkner Anna
Published: April 2024

Trust plays an important role in human life environments. That is why the researchers has been focusing on it for a long time. It allows us to delegate tasks and decisions to an appropriate person. In social sciences trust between humans was studied, but it also was analyzed in economic transactions. A lot of computer scientists from different areas, like security, semantic web, electronic commerce, social networks tried to transfer this concept to their domains. Trust is an essential factor in any kind of network, whether social or computer. Wireless sensor networks (WSN) are characterized by severely constrained resources, they have limited power supplies, low transmission bandwidth, small memory sizes and limited energy, therefore security techniques used in traditional wired networks cannot be adopted directly. Some effort has been expended in this fields, but the concept of trust is defined in slightly different ways by different researchers. In this paper we will show how the family of Role-based Trust management languages (RT) can be used in WSN. RT is used for representing security policies and credentials in decentralized, distributed access control systems. A credential provides information about the privileges of users and the security policies issued by one or more trusted authorities.
On the Optimal Design of a Broadcast Data Dissemination System over VANET Providing V2V and V2I Communications “The Vision of Rome as a Smart City”
Authors: Palma Veronica , Vegni Anna Maria
Published: April 2024

In different this paper we present the performance evaluation study of a simple broadcast data dissemination technique in new emerging Vehicular Ad hoc Networks (VANETs). Differently from the traditional Mobile Ad hoc NETworks (MANETs), VANETs require particular routing protocols, due to the high dynamism of the network topology, and to different traffic and mobility patterns. For safety and emergency message applications, broadcast data dissemination is an important key factor in VANETs. However, the design of optimal deployment of relay nodes in different network scenarios allows to enhance system performance. At this aim, this work analyzes vehicular network performances in terms of throughput and delays, for different traffic scenarios, exploiting both inter-vehicular communications, as well as the availability of fixed network infrastructure.
Mobile Telecommunication Systems Changed the Electronic Communications and ICT Market
Authors: Zieliński Andrzej , Zieliński Kazimierz
Published: April 2024

The paper covers development and importance of mobile (cellular) telecommunication services, which developed during last about 20 years and are currently the most important and profitable telecommunication sector. The development of mobile telecommunications becomes essential factor of economic growth in many countries, especially in developing countries. Currently due to the scientific and technological progress as well as the implementation a new standard known as LTE system, cellular telecommunication becomes the basic element of the modern broadband telecommunication infrastructure and internet services. Growing importance of the mobile systems is also connected with great popularity of new mobile terminals – smartphones and tablets. These terminals together with the technology known as cloud computing changed also the ICT market. The paper relates to the situation in many countries, but mainly to Poland.
Performance Tests of Xen-based Node for Future Internet IIP Initiative
Authors: Rzym Grzegorz , Wajda Krzysztof
Published: April 2024

In this paper the authors intend to report results for performance evaluation of Xen-based node providing both transport and computational functionalities. This node design is proposed as the implementation platform developed for the Polish Initiative of Future Internet called System IIP. In particular, we search for mutual dependence among transport and computational performance parameters of the node. Our investigations show that there is significant dependence among performance indices, such as virtual link bandwidth and node’s processing power, strongly depending on frame size. The tests and measurements were done according to fundamental methodology designed for network devices, described in RFC 2544. The goal of those investigations is to design a provisioning module allocating both transport and computational resources.
Recent Developments in Mobile Cloud Scheduling: State-of-the-Art, Challenges and Perspectives
Authors: Smelcerz Katarzyna
Published: April 2024

Cloud computing became recently one of the most popular multi-layer distributed computational and data processing environments with various types of services, distributed data storages and resources. With rapid development of mobile technologies, computational  clouds have been transformed into the systems with dynamically changing topology and flexible infrastructure through integration with the mobile devices and mobile users as the whole system nodes and actors. The aim of this paper is to provide a comprehensive study and critical comparative analysis of the recent developments in the Mobile Clouds with a new energy optimization criterion scheduling.
Application of High-Performance Techniques for Solving Linear Systems of Algebraic Equations
Authors: Grzonka Daniel
Published: April 2024

Solving many problems in mechanics, engineering, medicine and other (e.g., diffusion tensor magnetic resonance imaging or finite element modeling) requires the efficient solving of algebraic equations. In many cases, such systems are very complex with a large number of linear equations, which are symmetric positive-defined (SPD). This paper is focused on improving the computational efficiency of the solvers dedicated for the linear systems based on incomplete and noisy SPD matrices by using preconditioning technique – Incomplete Cholesky Factorization, and modern set of processor instructions – Advanced Vector Extension. Application of these techniques allows to fairly reduce the computational time, number of iterations of conventional algorithms and improve the speed of calculation.
Two Semantics of Trust Management Language with Negation
Authors: Felkner Anna
Published: April 2024

The family of Role-based Trust management languages is used for representing security policies by defining a formalism, which uses credentials to handle trust in decentralized, distributed access control systems. A credential provides information about the privileges of users and the security policies issued by one or more trusted authorities. The main topic of this paper is RT⊖, a language which provides a carefully controlled form of non-monotonicity. The core part of the paper defines two different semantics of RT⊖ language – a relational, set-theoretic semantics for the language, and an inference system, which is a kind of operational semantics. The set-theoretic semantics maps roles to a set of entity names. In the operational semantics credentials can be derived from an initial set of credentials using a set of inference rules. The soundness and the completeness of the inference system with respect to the set-theoretic semantics of RT⊖ will be proven.
Burst Ratio in Concatenated Markov-based Channels
Authors: Rachwalski Jakub , Papir Zdzisław
Published: April 2024

This paper deals with the burst ratio parameter, which describes the burstiness of a packet loss observed in digital networks. It is one of the input parameters of E-model – the most widely used method of assessing conversational quality of telephony. The burst ratio is defined for one channel scenario so it can be calculated when the whole transmission path has been characterized by a single set of parameters. The main objective of the paper is to extend the burst ratio definition when the transmission path is defined as a tandem concatenation of transmission channels being described by their individual burst ratios. It is assumed that packet loss of a single channel is described by a 2-state Markov chain. The final result of the research is an equation describing the burst ratio parameter when the transmission path consists of multiple concatenated channels. The derived formula has been validated by extensive simulations.
Professional Development of College English Teachers from the Perspective of Self-Education
Authors: Xu Daoping
Published: April 2024

The English proficiency of college students is correlated with the professional development of college teachers. Self-education is a fundamental element of the professional development of college English teachers. The article describes the connotation, characteristics, and significance of self-education for the professional development of teachers. Besides, it describes effective strategies for the professional development of college English teachers under the threshold of selfeducation.
Image Thinking and Modeling of Chinese Painting
Authors: Zhou Zhensheng
Published: April 2024

As the essence of Chinese traditional culture, Chinese painting is distinguished from other paintings by its unique art form and expression technique. Among them, image thinking and image modeling are the soul of Chinese painting, which is an important way to express the artist’s unique feelings and thoughts, and also the source of the unique charm of Chinese paintings. Therefore, this paper mainly explores the image thinking and modeling of Chinese painting, and its importance, and analyzes the application of image thinking and modeling in Chinese painting.
Preliminary Study on the Integrated Publishing for Further Medical Education
Authors: Zhang Rong
Published: April 2024

The “14th Five-Year Plan for the Development of the Publishing Industry” highlights the role of scientific and technological innovation in promoting the digital transformation and upgrading of the publishing industry. The plan advocates for the application of 5G, big data, cloud computing, artificial intelligence, blockchain, Internet of Things, virtual reality, and augmented reality in the publishing field. Besides, it also promotes the application of the national public service platform for the publishing and distribution of information. It can be seen that the publishing industry has been integrated into the new technological development and industrial transformation. During the “13th Five-Year Plan” period, the scale of digital publishing for education and training has been continuously expanded, the products have been continuously diversified, and the industrial chain has become increasingly mature. Furthermore, the policy system has been continuously improved, the pace of transformation has been steadily advancing, and development has become increasingly integrated. Taking the integrated publishing of education and training in the ultrasound medical industry as an example, this paper expounds the practice of the Scientific and Technical Literature Press in the construction of knowledge system, the exploration of knowledge service mode, and the construction of online/offline learning platform in the field of education and training.
Pengaruh Layanan Bermain Bersama Terhadap Perkembangan Sosial Emosional Anak Di Rumah Anak SIGAP Kecamatan Koroncong
Authors: Khalisha Fadhilah Nur , Gustiana Asep Deni
Published: April 2024

AbstractThis study aims to evaluate the program of group play together at Rumah Anak SIGAP Kecamatan Koroncong on the socio-emotional development of children. Social and emotional aspects have an important role in determining the quality of life. The main focus of the study was on the implementation of stimulation provided in the KBB program with the aim of improving child development. This study used the method of pre-experiment with design one group pre-test post-test. Data were obtained from a sample of 30 participants. Data were collected through tests and analyzed using Paired T-Tests. The results showed that before receiving the treatment (pre-test) the average value of children's social emotional development was 56.83 and after the treatment (post-test), the value increased to 62.73. Statistical analysis with T-test showed Sig 0.011 < 0.05 which means H0 rejected and Ha accepted. Thus, it can be concluded that there is a significant increase in the social emotional development of children before and after participating in the play group service program at Rumah Anak SIGAP, Koroncong District. This discovery has important implications in the design of similar educational programs in strengthening the development of children in the early stages of their lives.Keywords: Child Development; Social Emotional; SIGAP Children's HomeAbstrakPenelitian ini memiliki tujuan untuk mengevaluasi program layanan Bermain Bersama di Rumah Anak SIGAP Kecamatan Koroncong terhadap perkembangan sosial-emosional anak. Dalam konteks perkembangan anak, aspek sosial dan emosional memiliki peran penting dalam menentukan kualitas hidup anak. Fokus utama penelitian adalah pada implementasi stimulasi dalam program KBB dengan tujuan meningkatkan perkembangan anak. Penelitian ini menggunakan metode pre-eksperimen dengan design One Group Pre-test Post-test. Data diperoleh dari sampel yang berjumlah 30 partisipan. Data dikumpulkan melalui tes dan dianalisis menggunakan Paired T-Test. Hasil penelitian menunjukkan bahwa sebelum menerima perlakuan berupa stimulasi dalam program layanan kelompok bermain bersama (pre-test) nilai rata-rata perkembangan sosial emosional anak adalah sebesar 56,83 dan setelah pemberian perlakuan (post-test), nilai tersebut meningkat menjadi sebesar 62,73. Analisis statistik dengan uji-t menunjukkan Sig 0,011 < 0,05 yang artinya H0 ditolak dan Ha diterima. Dengan demikian, dapat disimpulkan bahwa terdapat peningkatan yang signifikan dalam perkembangan sosial emosional anak sebelum dan sesudah mengikuti program layanan bermain bersama di Rumah Anak SIGAP Kecamatan Koroncong. Penemuan ini memiliki implikasi penting dalam perancangan program pendidikan serupa dalam memperkuat perkembangan anak pada tahap awal kehidupan mereka.Kata kunci: Bermain Bersama; Sosial Emosional; Rumah Anak SIGAP
Talleres de superación profesional para rehabilitadores físicos de pacientes con enfermedades neurológicas y enfermedades no transmisibles asociadas
Authors: Noa Pelier Bárbara Yumila , Barcos Pina Indira , Martínez Blanco Yadimir
Published: April 2024

Introducción. A nivel mundial, el aumento progresivo del número de personas con enfermedades crónicas genera un impacto sanitario, social y económico. Múltiples estudios demuestran la presencia de varias enfermedades no transmisibles durante la vida de las personas, así como la asociación de las enfermedades neurológicas con otras enfermedades no transmisibles. La superación profesional se logra mediante una formación permanente enfocada en la actualización sistemática de los conocimientos y el desarrollo de las habilidades y los valores necesarios para el adecuado desempeño profesional mediante alternativas sólidas, flexibles, concretas y humanistas. En la actualidad, la preparación que reciben los rehabilitadores físicos del Centro Internacional de Restauración Neurológica de La Habana, Cuba, resulta insuficiente para asumir la responsabilidad del proceso de rehabilitación de pacientes con enfermedades neurológicas y enfermedades no transmisibles asociadas.
Objetivo. Realizar una propuesta de talleres para la superación profesional de los rehabilitadores físicos que desarrollan el proceso de neurorrehabilitación en los pacientes con secuelas de enfermedades neurológicas y enfermedades no transmisibles asociadas atendidos en el Centro Internacional de Restauración Neurológica.
Métodos. Estudio descriptivo en el que se utilizaron métodos del nivel teórico y empírico que propician la elaboración de una propuesta de talleres con criterios individualizados para la superación profesional de rehabilitadores físicos que atienden a pacientes con enfermedades neurológicas y enfermedades no transmisibles asociadas, atendiendo las particularidades de cada paciente.
Conclusiones. Los talleres de superación profesional para los rehabilitadores físicos que atienden pacientes con secuelas de enfermedades neurológicas y enfermedades no transmisibles asociadas basados en la educación avanzada y la andragogía transformarán los modos de atención a esta población, lo cual garantizará una intervención personalizada.