Dynamic Concept Research Articles

A clinical case of using the concept of monitoring in the treatment of a gunshot defect of the soft tissues of the knee joint

Rapid rehabilitation and restoration of the function of damaged anatomical areas in the military is the main goal of military medicine. In the case of gunshot wounds of the knee joint with defects of soft tissues, one of the optional methods of reconstructive and plastic "closure" is the usage of a propeller flap. The clinical case represents a mine-explosive wound of the lower extremities with a defect of the soft tissues of the lateral aspect of the right knee joint in a serviceman of the Ukrainian Armed Forces as a result of artillery shelling in the east of Ukraine in November 2022. There was an isolated shrapnel tangential non-penetrating wound on the lateral aspect of the right knee joint with a soft tissue defect measuring 7.2x3.2-1.0 cm. The aim of the work was to study the thermographic and sonographic features of soft tissue perfusion after gunshot injuries of the lower extremities and on the basis of the temperature dynamics data from the wound surface in combination with the sonographic examination of the vessels to determine the rationality and relevance in the reconstruction of defects of the lower extremities by propeller tactics. Reconstruction with flap with a perforating vessel as the "key" of LSGA (lateral superior genicular artery) and a dynamic multimodal concept (DMT) with the use of audio doppler in the pre-, intra- and postoperative period) with closure of the defect due to a rotary perforating flap with supplying was carried out. During the entire period of treatment, of the injured the temperature background from the surface of the flap was followed up using FLIR C2, and sonographic changes in blood flow were monitored in the projection of the LSGA location. We came to the conclusion that applying the technique of flaps on perforating vessels, several goals are tactically achieved: restoration of the completeness and function of the damaged area, reduction of complications in the recipient and donor areas. Thus, the propeller flap can be classified as a primary option for "replacemen t" of tissues among the restorative tactics of the damaged area of the lower extremities caused by a gunshot origin.

The Essence of Nature and Dialectical Naturalism

In this paper, we examine how nature is defined and perceived and address the conflict between constructivism and essentialism. By exploring modern perspectives on the concept of nature that stem from the field of social sciences, we will review the analysis of Murray Bookchin’s dialectical naturalism regarding the very essence of nature. We argue that dialectical naturalism offers a dynamic developmental concept of nature that goes beyond the context of constructivism and supports that the truth of nature can be conceived.

Dynamic Structural Scaling Concept for a Delta Wing Wind Tunnel Configuration Using Additive Manufacturing

Considering aeroelastic effects plays a vital role in the aircraft design process. The construction of elastic wind tunnel models is a critical element in the investigation of occurring aeroelastic phenomena. However, the structural scaling between full-scale and reduced-scale configurations is a complex design and manufacturing task and is usually avoided in wind tunnel testing. This work proposes a numerical approach for a dynamic aeroelastic scaling technique, which is applied to a fictive delta wing configuration. This scaling methodology is designed to optimise the structural layout of wind tunnel models with an integrated rib and spar structure to meet the behaviour of a realistic full-scale equivalent. For the modelling approach of the wing structure, a beam and shell structure is utilised. The applied scaling laws for the relevant quantities and the applied procedures are described. Computational fluid dynamics (CFD) calculations are performed by solving the Reynolds-averaged Navier–Stokes (RANS) equations for the assumption of a rigid full-scale and down-scaled wing. These calculations are used to verify the aerodynamic scaling assumptions, which are applied to the scaling procedure of the wind tunnel model. Global aerodynamic coefficients are evaluated for a variety of angles of attack. The local flow phenomena of the full-scale and the scaled model are compared in more detail for a medium and a high angle of attack. The pressure coefficient distribution shows a proper accordance for the full-scale and the scaled model. To verify the results of the structural scaling optimisation, a high-fidelity structural full-scale model is compared with the scaled model using the ELFINI FEM solver. Therefore, all structural components are modelled by 2D elements. The results for the reduced eigenfrequencies and according modes of the full-scale and the scaled model show a high level of similarity. A static deformation of the structural grids is performed by applying the aerodynamic loads from the CFD simulations. The results show that the deviation of the nondimensional deformation between the scaled and the full-scale model is negligible. Consequently, the applied scaling methodology proves to be a valuable tool for the conceptual approach of designing aeroelastically scaled wind tunnel models considering 3D-printed material.

International Law´s premature farewell to the concept of War

According to the dominant view, the supposedly state-centric concept of war has been successively replaced after the Second World War by the concepts of use of force, aggression, and armed attack in international security law, on the one hand, and the concept(s) of armed conflict in international humanitarian law, on the other. Based on an analysis of post-war codifications, in particular, international human rights law, this article argues that it is yet still too premature to bid farewell to war as a concept that for centuries has shaped the practice and theory of international law. Rather, it should be treated as a dynamic umbrella concept recognizing that non-state actors may be capable of committing acts of war, i.e., armed attacks triggering a state´s inherent right to self-defence. As further explained by the authors, this 21st century concept of war might be located in international law´s general part, thus overstretching its different subareas and without altering the lex specialis-concepts contained therein.

“The Child Needs to Tell it to Me in Words”

Abstract Much research on child witnesses in child sexual abuse trials is focused on children’s performance in legal proceedings. Witness competency, that is predicated on the adversarial justice system’s principle of orality, is core to child witness testimony, and is determined at the pre-trial stage. However, this article highlights the need to consider child witness competency as a dynamic concept, that varies in response to the ecologies of the trial processes as they unfold. Set in a low-middle-income country, this qualitative study describes and analyzes trial processes through a child-inclusive lens, identifying barriers and facilitators to child witness competency. The results were mixed, yielding three major conclusions for consideration: (i) the importance attributed to physical infrastructure, and the creation of vulnerable deposition rooms; (ii) the role of judicial discretion in issues of child witness competency and (iii) role of intermediaries, with regard to enhancing child witness competencies.

Access to treatment in chronic kidney disease, dialysis and transplantation. Is there gender equality?

Sex and gender are often used as synonyms. However, while sex describes only a biological state, gender is a dynamic concept that takes into account psychosocial and cultural aspects of human existence that can change according to place and time. Inequality in medicine has been described in several areas. Among them, gender inequality has been disregarded for many years and is now a matter of concern. Chronic kidney disease (CKD) is a growing epidemic worldwide, affecting approximately 10% of the population. Although both men and women are affected, gender equality, especially in access to different treatments, is a matter of concern. We decided to investigate gender equality in patients with CKD. To this end, we conducted a literature narrative review to determine whether gender inequalities were found in CKD patients in general and in access to different treatment modalities in particular. A non-language restricted search was performed until November 30th 2022 in PubMed, SciELO, Trip Database, Google Scholar, MEDES y MEDLINE. We also investigated the situation in this regard in our country. We found that CKD is more prevalent in women than men, nevertheless this prevalence decreases along the CKD stages to the point that more men reach end stage kidney disease (ESKD) and dialysis. Access to transplant (ATT) is higher in men than in women although posttransplant survival shows no gender differences. Finally, most series have shown that women are more frequently Kidney transplantation (KT) living donors than men. Results in our country are similar to the published literature with the exception of a higher proportion of men as KT living donors. As in other areas, gender inequality in Nephrology has been largely overlooked. In this review we have highlighted gender differences in CKD patients. Gender inequality in Nephrology exists and needs to be looked upon in order to reach a personalized clinical approach.

From Blind Spot to Crucial Concept: On the Role of Animal Welfare in Food System Changes towards Circular Agriculture

Agriculture in Western Europe has become efficient and productive but at a cost. The quality of biodiversity, soil, air, and water has been compromised. In the search for ways to ensure food security and meet the challenges of climate change, new production systems have been proposed. One of these is the transition to circular agriculture: closing the cycles of nutrients and other resources to minimise losses and end the impact on climate change. This development aims to address existing problems in food production but also raises questions about animal health and welfare. Although the role animals can play in this development is not ignored, the animal welfare dimension of circular agriculture seems to be overlooked. We argue that this is a problem both for the success of circular agriculture and for the animals involved. To substantiate this claim, we analyse the background to this lack of attention, which we find in (a) the way circular agriculture is conceptualised; (b) the institutional hurdles related to the legal, political and economic context; and (c) the concept of animal welfare, which requires further innovation. By analysing these aspects, we develop stepping stones for an animal-welfare inclusive concept of circular agriculture. These stepping stones include: recognising the animal as a participant with its own interests in the innovation towards circular agriculture; using a dynamic concept of animal welfare; a concept of circularity that provides space for social values, including animal welfare; and attention to institutional innovation by improving public engagement and building trust.

CONCEPTUAL FRAMEWORK TO STUDY TEAM COHESION IN HUMAN-ROBOT TEAMS

Abstractuse-case scenarios, including homes, hospitals, workplaces, and recreation. Though the area of Social Robotics has gained traction in recent years, the majority of the studies so far have studied single-human and single-robot interaction. In comparison, Social Robots are increasingly being placed in human teams, likely affecting team dynamics. On the other hand, Engineering teams work together to deliver outstanding results and the processes in these teams are social. We propose that Social robot can be added to engineering human team to enhance team cohesion and performance. Therefore, this paper presents a preliminary framework towards developing a conceptual framework to study team cohesion in Human-Robot Teams (HRTs) in engineering context, looks at different roles of social robot and how the responses, behaviours, emotions of social robots shape outcomes in the engineering team. The research specifically focuses on team cohesion because team cohesion is reportedly one of the most critical concepts in team dynamics. The paper outlines the research objectives, framework and concept workflow.

The development of a W-shaped channel extrusion for fabricating magnesium alloy shells by combining high amplitude shear strain with a shorter process

This paper introduced a novel single-pass severe plastic deformation method, W-shaped channel extrusion (WCE), for the direct manufacturing of magnesium alloy shells. Based on a strategically installed mandrel and die with a sloping asymmetric step structure, the WCE constructed a narrow severe plastic deformation gap specially reinforced by a backpressure-shear structure and an asymmetric shear-extrusion section. Therefore, slender bar with large height-to-diameter ratio (i.e. small diameter, large height) could easily be extruded into larger diameter shell in narrow gap through only one pass, and an impressive average plastic strain of over 4.1 was concurrently achieved, evidenced by upper bound theory calculation. The WCE process was further experimentally conducted on AZ80 alloy at 340 °C, demonstrating remarkable improvements in yield strength, ultimate tensile strength, and elongation of the extruded part by factors of 2.4, 2.2, and 4.3 over the as-cast condition. The consecutive multi-stage shear and high hydrostatic pressure catalyzed extreme grain refinement, favored high matrix dislocations and concurrently facilitated the early dynamic conception of granular β-Mg17Al12 particles in subgrains stage, all of which served the superior performance. Moreover, no prominent anisotropy detected in the extruded part due to the development of a special bimodal basal texture under shear stress, where its synergistic effect with grain refinement evidently promoted the balance of strength and plasticity. Finally, the mechanism of bimodal texture formation associated with specific slip activations during WCE and anisotropic weakening was revealed in detail.

Endothelial Cells and Mitochondria: Two Key Players in Liver Transplantation.

Building the inner layer of our blood vessels, the endothelium forms an important line communicating with deeper parenchymal cells in our organs. Previously considered passive, endothelial cells are increasingly recognized as key players in intercellular crosstalk, vascular homeostasis, and blood fluidity. Comparable to other cells, their metabolic function strongly depends on mitochondrial health, and the response to flow changes observed in endothelial cells is linked to their mitochondrial metabolism. Despite the direct impact of new dynamic preservation concepts in organ transplantation, the impact of different perfusion conditions on sinusoidal endothelial cells is not yet explored well enough. This article therefore describes the key role of liver sinusoidal endothelial cells (LSECs) together with their mitochondrial function in the context of liver transplantation. The currently available ex situ machine perfusion strategies are described with their effect on LSEC health. Specific perfusion conditions, including perfusion pressure, duration, and perfusate oxygenation are critically discussed considering the metabolic function and integrity of liver endothelial cells and their mitochondria.

Examining the validity, reliability and feasibility of capturing children's physical literacy through games-based assessment in physical education.

Observational tools can help refine practice design and guide the creation of effective learning environments. The intention of this study was to design and validate an observational instrument for assessing physical literacy that remains more faithful to the philosophically complex and holistic nature of the concept. Framed by concepts of ecological dynamics, the emergent games-based assessment tool enables capture of children's interactions with their environment, providing insight on the manifestation of physical literacy within physical education games. The design and validation of the instrument consisted of a multistage process: (1) design of the observational instrument and establishing face validity; (2) pilot observation study; (3) expert qualitative and quantitative review to establish content validity; (4) observation training; and (5), establishing observer reliability. Following expert qualitative and quantitative evaluation, Aiken's V coefficient was used to determine content validity. Results achieved demanding levels of validity (V ≥ 0.78) for all retained measurement variables. Cohen's κ values for inter- and intra-observer reliability ranged from 0.331 to 1.00 and 0.552 to 1.00, generally reporting "substantial" agreement during inter-observer analysis and "substantial" to "almost perfect" agreement during intra-observer analysis. The final model of the emergent games-based assessment tool, with 9 ecological conceptualisations of behaviour, 15 measurement variables, and 44 categorical observational items was found to be valid and reliable, providing both educators and researchers with a useful mechanism to assess physical literacy during gameplay.

Machine perfusion techniques for liver transplantation - A meta-analysis of the first seven randomized-controlled trials

Machine perfusion is increasingly being tested in clinical transplantation. Despite this, the number of large prospective clinical trials remains limited. The aim of this study was to compare the impact of machine perfusion vs. static cold storage (SCS) on outcomes after liver transplantation. A systematic search of MEDLINE, EMBASE, CINAHL and the Cochrane Central Register of Controlled Trials (CENTRAL) was conducted to identify randomized-controlled trials (RCTs) comparing "post-transplant" outcomes following machine perfusion vs. SCS. Data were pooled using random effect models. Risk ratios (RRs) were calculated for relevant outcomes. The quality of evidence was rated using the GRADE-framework. Seven RCTs were identified (four on hypothermic oxygenated [HOPE] and three on normothermic machine perfusion [NMP]), including a total number of 1,017 patients. Both techniques were associated with significantly lower rates of early allograft dysfunction (NMP: n= 41/282, SCS: n= 74/253, RR 0.50, 95% CI 0.30-0.86, p=0.01, I2= 39%; HOPE: n= 45/241, SCS: n= 97/241, RR 0.48, 95% CI 0.35-0.65, p<0.00001, I2= 5%). The HOPE approach led to a significant reduction in major complications (Clavien Grade ≥IIIb; HOPE: n= 90/241; SCS: n= 117/241, RR 0.76, 95% CI 0.63-0.93, p=0.006, I2= 0%), "re-transplantation" (HOPE: n= 1/163; SCS: n= 11/163; RR 0.21, 95% CI 0.04-0.96, p=0.04; I2= 0%) and graft loss (HOPE: n= 7/163; SCS: n= 19/163; RR 0.40, 95% CI 0.17-0.95, p=0.04; I2= 0%). Both perfusion techniques were found to 'likely' reduce overall biliary complications and non-anastomotic strictures. Although this study provides the highest current evidence on the role of machine perfusion, outcomes remain limited to a 1-year follow-up after liver transplantation. Comparative RCTs and large real-world cohort studies with longer follow-up are required to enhance the robustness of the data further, thereby supporting the introduction of perfusion technologies into routine clinical practice. CRD42022355252. For a decade, two dynamic perfusion concepts have increasingly been tested in several transplant centres worldwide. We undertook the first systematic review and meta-analysis and identified seven published RCTs, including 1,017 patients, evaluating the effect of machine perfusion (hypothermic and normothermic perfusion techniques) compared to static cold storage in liver transplantation. Both perfusion techniques were associated with lower rates of early allograft dysfunction in the first week after liver transplantation. Hypothermic oxygenated perfusion led to a reduction in major complications, lower "re-transplantation" rates and better graft survival. Both perfusion strategies were found to 'likely' reduce overall biliary complications and non-anastomotic biliary strictures. This study provides the highest current evidence on the role of machine perfusion. Outcomes remain limited to a 1-year post-transplant follow-up. Larger cohort studies with longer follow-up and clinical trials comparing the perfusion techniques are required. This is especially relevant to provide clarity and optimise implementation processes further to support the commissioning of this technology worldwide.

Utilization of a Learning Management System to Develop Critical Thinking Skills

The concept of a Learning Management System (LMS) is a dynamic concept of critical thinking. This research aims to explain using LMS to develop critical thinking skills. This type of research is qualitative with a literature review. The data sources used secondary data from journals, books, and references. Data collection techniques were carried out with documentation, while data analysis was through content analysis. Learning Management System (LMS) can improve students’ critical thinking skills because it will familiarize students with problem-solving and/or learning from problems, as well as the educators in developing thinking skills. It was concluded that the Learning Management System (LMS) based discussion method could improve undergraduate students' critical thinking skills.

Knowledge Dynamics: Exploring its Meanings and Interpretations

Abstract In the literature there are many and different interpretations of the concept knowledge dynamics that creates a real difficulty in working with it. There is no comprehensive study of all these meanings and interpretations attributed to knowledge dynamics. The purpose of this paper is to explore the semantic spectrum of the concept of knowledge dynamics and to reveal the most relevant meanings and interpretations researchers in the domain of knowledge management attribute to it. The multitude of meanings and interpretations can be explained as a result of using different metaphors for expressing the concept of knowledge. Also, many researchers come from different domains of science and have different practical experiences in working with knowledge and knowledge management. The research question is how can be found a common framework to explain the most significant meanings and interpretations of the knowledge dynamics concept. Understanding this concept is necessary for all researchers, academics, and practitioners working in the domain of knowledge management and intellectual capital. The research method is based on a critical literature review, on using metaphorical thinking and on a comparative semantic analysis. It is a conceptual paper and therefore its structure will follow the logic of analysis and not that used for empirical research papers. The findings are integrated into a complex but coherent semantic framework based on both Newtonian and Thermodynamics principles.

Two-Way Concept-Cognitive Learning Method: A Fuzzy-Based Progressive Learning

Granular computing (GrC) and two-way concept learning (TCL) are influential studies of knowledge processing and cognitive learning. A central notion of two-way concept learning is learning concepts from an arbitrary information granule. Although TCL has been widely adopted for concept learning and formal concept analysis in a fuzzy context, the existing studies of TCL still have some issues: 1) the sufficient and necessary granule concept is only obtained from the necessary granule or sufficient granule concept; 2) the cognitive mechanism ignores integrating past experiences into itself to deal with dynamic data. Meanwhile, concept-cognitive learning (CCL) method still faces challenges, such as incomplete cognitive and weak generalization ability. This paper proposes a novel two-way concept-cognitive learning method for dynamic concept learning in a fuzzy context for these problems and challenges. Unlike TCL, fuzzy-based twoway concept-cognitive learning (F-TCCL) is more flexible and less time-consuming to learn granule concepts from the given clue, and meanwhile, it is good at dynamic concept learning. Moreover, we design a fuzzy-based progressive learning mechanism within this framework under the dynamic environment. Some numerical experiments on public datasets verify the effectiveness of our proposed method. The considered framework can provide a convenient novel method for researching two-way learning and concept-cognitive learning.

Trends and Obstacles to Implement Dynamic Perfusion Concepts for Clinical Liver Transplantation: Results from a Global Web-Based Survey.

Organ perfusion technology is increasingly used in many countries, with a focus, however, on the Western world. This study investigates the current international trends and obstacles to the broader routine implementation of dynamic perfusion concepts in liver transplantation. A web-based anonymous survey was launched in 2021. Experts of all involved specializations from 70 centers in 34 countries were contacted, based on the published literature and experience in the field of abdominal organ perfusion. Overall, 143 participants from 23 countries completed the survey. Most respondents were male (67.8%) and transplant surgeons (64.3%) working at university hospitals (67.9%). The majority had experience with organ perfusion (82%), applying mainly hypothermic machine perfusion (HMP; 38%) and other concepts. While most (94.4%) expect a higher utilization of marginal organs with machine perfusion, the majority considers HMP the best technique to reduce liver discard-rates. While most respondents (90%) believed machine perfusion should be fully commissioned, the lack of funding (34%) and knowledge (16%) as well as limited staff (19%) were the three main obstacles to a routine clinical implementation. Although dynamic preservation concepts are increasingly used in clinical practice, significant challenges remain. Specific financial pathways, uniform regulations, and tight collaborations among involved experts are needed to achieve wider global clinical use.

The Changing Face of Journalistic Autonomy: A Case Study of De Standaard (1976–2020)

ABSTRACT Autonomy is considered a prerequisite for the press to function in service of the public. Over the past few decades, both journalism and society at large have been subjected to significant change and instability, potentially affecting journalists’ independent modes of production. We, therefore, argue that a re-evaluation of journalism’s institutional strength to perform the societal functions bestowed upon it by the public is imperative. This paper attempts to contribute to this re-evaluation by examining to what extent legacy media journalists act according to their own professional logic rather than being historically conditioned to act according to external logics imposed on the field of journalism. We adopt a qualitative historical approach grounded in the theoretical framework of field theory for our examination of the development of journalistic autonomy at Flemish newspaper De Standaard. Based on a rich body of source material that emphasizes the rarely considered perspective of chief editors, we reconstruct journalistic autonomy as a dynamic concept shaped by an intricate web of interconnected macro-, meso- and micro-level developments and interactions.

Evolution of the Concepts of Architecture and Supramolecular Dynamics of the Plasma Membrane.

The plasma membrane (PM) has undergone important conceptual changes during the history of scientific research, although it is undoubtedly a cellular organelle that constitutes the first defining characteristic of cellular life. Throughout history, the contributions of countless scientists have been published, each one of them with an enriching contribution to the knowledge of the structure-location and function of each structural component of this organelle, as well as the interaction between these and other structures. The first published contributions on the plasmatic membrane were the transport through it followed by the description of the structure: lipid bilayer, associated proteins, carbohydrates bound to both macromolecules, association with the cytoskeleton and dynamics of these components.. The data obtained experimentally from each researcher were represented in graphic configurations, as a language that facilitates the understanding of cellular structures and processes. This paper presents a review of some of the concepts and models proposed about the plasma membrane, emphasizing the components, the structure, the interaction between them and the dynamics. The work is illustrated with resignified 3D diagrams to visualize the changes that occurred during the history of the study of this organelle. Schemes were redrawn in 3D from the original articles...

DYNAMICS OF WEST JAVA PROVINCIAL GOVERNMENT IN IMPLEMENTING SECURITY, TEST, PUBLIC ORDER AND PROTECTION OF THE COMMUNITY POST 2019 ELECTIONS

Before and after the 2019 Presidential Election there was political polarization in society. This condition is made worse by the existence of identity politics which has the potential to cause social segregation. This situation can certainly threaten the security and order of the people of West Java. To analyze the West Java Provincial Government's efforts to deal with community dynamics, the authors used the Dynamic Governance concept approach proposed by Boon Shiong, Neo, and Geraldine, Chen (2007) with a focus on discussion on Capability elements which include Thinking Ahead, Thinking Again, and Thinking Across. In addition, the Culture element will analyze five of the thirteen values, namely: Integrity, Multi-racialism (Different ethnicities and beliefs), Relevance (According to the Will of the Society), Stability, and Prudence. There are also changes due to elements of culture and capabilities. Moreover, to analyze the commitment of the West Java Provincial Government in implementing the development of human security this research was analyzed by using the theory of Human Security according to Mary Kaldor (2007). Based on the research results, it was found that; First, the West Java Provincial Government was able to predict the potential for social conflict due to political polarization in society. Therefore, preventive, pre-emptive, and repressive steps are taken to locate potential conflicts so that they do not spread; Second, the Provincial Government of West Java has not carried out social consolidation and reconciliation to reunite the polarized society. Thus, the potential for political polarization in the coming elections is quite potential; Third, the Provincial Government of West Java continues to make socialization and education efforts for the community through development policies that are in favor of the interests of the community, so that it is hoped that the community can understand the importance of security and for development and improving public welfare.

Robust quantum many-body scars in lattice gauge theories

Quantum many-body scarring is a paradigm of weak ergodicity breaking arising due to the presence of special nonthermal many-body eigenstates that possess low entanglement entropy, are equally spaced in energy, and concentrate in certain parts of the Hilbert space. Though scars have been shown to be intimately connected to gauge theories, their stability in such experimentally relevant models is still an open question, and it is generally considered that they exist only under fine-tuned conditions. In this work, we show through Krylov-based time-evolution methods how quantum many-body scars can be made robust in the presence of experimental errors through utilizing terms linear in the gauge-symmetry generator or a simplified pseudogenerator in U(1) and Z2 lattice gauge theories. Our findings are explained by the concept of quantum Zeno dynamics. Our experimentally feasible methods can be readily implemented in existing large-scale ultracold-atom quantum simulators and setups of Rydberg atoms with optical tweezers.