Concept Of System Research Articles

Oxygen as obturation biomaterial in endodontic treatment: development of novel membranous dental restoration system

Complexities in obturation and difficulties in disinfection represent significant issues that render endodontic treatment notably time-consuming. A new perspective is essential to reduce both working time and address these two challenges. To date, none of the established techniques for root canal obturation can assure a perfect seal. Solid materials are not easily manipulated to hermetically fill the intricate branches of the root canal system. Concurrently, anaerobic and facultative anaerobic bacteria, particularly Enterococcus faecalis, are predominant in discussions surrounding endodontic infections. Numerous studies have demonstrated that achieving complete disinfection of Enterococcus faecalis is exceedingly difficult, even with the use of irrigating solutions that possess strong antibacterial properties. Under anaerobic conditions, the invasion efficiency of facultative anaerobes is heightened. If irrigation and disinfection fail to entirely eliminate anaerobes and facultative anaerobes, a novel strategy is required to address the bacteria that persist within the root canal. Oxygen can easily permeate the root canal system, eradicate anaerobes, and inhibit facultative anaerobes from becoming pathogenic. Therefore, employing oxygen as a biomaterial for obturation following appropriate cleaning and shaping procedures is anticipated to address the two primary endodontic issues. This article aims to explore a new potential concept for a dental restoration system that utilizes an oxygen-permeable membrane to reduce the time required for endodontic treatment. The membrane is positioned at the orifice of a duct designed to connect the entire root canal system with ambient air outside the restoration. The function of the membrane is somewhat analogous to the masks used during the COVID-19 pandemic, as it allows for the circulation of oxygen while preventing the passage of fluids, debris, and microorganisms. We hypothesize that the oxygen circulating within the root canal system will also function as a continuously renewing antimicrobial agent.

Systems of knowledge organizing in philological information resources

The concept of knowledge organization system (Knowledge Organization System, KOS) is introduced and discussed in this article. Approaches to the typology of KOS are considered. The BARTOC database is analyzed, containing the most complete list of KOS, including more than 130 philological KOS. Philological KOS related to the following types are described: authority lists, terminologies and glossaries, hierarchical classifications, metadata systems, thesauri, ontologies, as well as some unique KOS. Russian philological KOS are considered separately. It is proposed to create a database of Russian philological KOS, as a component of the infrastructure of the Russian scientific and scholarly information space.

Initial design concepts for solid boron injection in ITER

As part of ITER’s consideration to change its first wall material from beryllium to tungsten, the ITER Organization has proposed studying the feasibility of real-time solid boron injection (SBI) into the plasma to coat the walls and divertor to supplement glow discharge boronization (GDB) [1]. Boron deposits getter oxygen and reduce sputtering of tungsten from plasma facing components (PFCs). Particularly in areas with significant plasma wall interactions, boron coatings are expected to be short-lived under high performance plasma conditions. The proposed SBI system aims to maintain boron layers in these areas to avoid excessive radiation from tungsten in the plasma as a risk mitigation to ensure ITER will be able to reach and sustain Q = 10 conditions. The system will be used sparingly, as redeposition of boron can lead to significant tritium retention, which must be minimized in ITER to comply with nuclear safety concerns. SBI is proposed to limit and precisely control the amount of boron injected in real-time during plasma operation. Here, some of the design requirements and initial concepts for an SBI system in ITER are presented based on previous results carried out with SBI systems on a number of tokamaks and stellarators around the world [2–18].Previous results using SBI systems installed by PPPL have injected boron particles from 5 µm–2 mm diameter at calibrated rates of 2–200 mg/s in real-time during plasma operation on AUG [4], DIII-D [5], EAST [6], KSTAR [7], LHD [8], TFTR [9], WEST [10], and W7-X [11,12], leading to improved wall conditions with reduced plasma impurity concentrations and radiated power and improved plasma performance. The boron is ionized in the plasma edge and then deposited on plasma-wetted surfaces. On AUG [4], EAST [6] and WEST [10] reduced tungsten sputtering sources were observed following several discharges with SBI. Extrapolation of these SBI results are presented to estimate the amount of boron needed for wall conditioning in ITER. Real-time SBI control requirements and plasma operation scenarios for ITER are also described.

Microalgae biomass: A multi-product biorefinery solution for sustainable energy, environmental remediation, and industrial symbiosis

The rapid expansion of industrialization and the depletion of non-renewable fossil fuel have urged the search for alternative and sustainable renewable resources to fulfil the escalating energy demand while reducing water pollution and greenhouse gas emissions. Microalgae have emerged as a promising and sustainable solution, capable of not only treating wastewater but also yielding valuable products. This study aimed to explore the primary applications of microalgae, including wastewater treatment and CO2 sequestration, while assessing the viability of utilizing the resultant microalgae biomass (MB) across diverse sectors such as liquid and gaseous biofuels, bioplastics, animal and aquatic feed, nutraceuticals and pharmaceuticals, biofertilizers, and cosmetics production. Additionally, the study discusses the importance of assessing the environmental impacts of these applications through life cycle assessment (LCA) studies and elaborate the concept of a multi-products biorefinery system. To address the contemporary challenges of the bio-economy in simultaneously producing multiple high-value products, the biorefinery complexity index (BCI) was estimated to be 37, highlighting the need for further research to establish the practicability of a multi-products biorefinery system.

Implementation of Control Valves System on Microturbine Drone’s Rotational Motion

The drone technology has received a wide range of research focusing on improving flight dynamics, battery life, payload capacity and sensor technology. However, for the applications of using drone for high rise buildings are limited by battery life for longer flight with longer duration tasks. This work presents the implementation of a control valve systems for the rotational motion of a microturbine drone. The first objective of this project was to design and develop a control valve system for a microturbine with propeller. The second objective was to measure micro turbine’s performance output which consisted of revolution per minute (rpm) and voltage (V) produced with the control valves system. The final objective was to verify the effectiveness of the control valve system by measuring the differences of the turbine speed of each turbine on the quadcopter to conceptually control the rotational motion of the drones. In conclusion, this work demonstrated the concept of the developed control valve system that can control the rotational motion of the drone.

The different ways to operationalise the social in applied models and simulations of sustainability science: A contribution for the enhancement of good modelling practices

There are several concepts out there, which describe modelling as a circular process with several rounds of iteration. The aim of these concepts is to structure the process and gain insights into the various steps carried out during a modelling project. It is common to all these concepts that they are created by modellers themselves, hence the focus is on generating a good modelling practice (GMP) in standardising technical aspect. However, modelling must also be considered as a social process, which have so far only been marginally considered in these GMP protocols.Therefore, we explored the different approaches to incorporate the social aspects into GMP of interdisciplinary applied modelling projects in sustainability science with reference to sociological knowledge. While discussing the social dimensions in the modelling process, we found that two perspectives need to be distinguished, namely a structural and a procedural one. From a structural perspective, various approaches have developed to model interactions and feedbacks between ecological and social aspects of a sustainability problem. Among the best known is the concept of the social-ecological system, which makes it possible to grasp the complexity of reality in ecological and social subsystems that are intertwined within each other. From a procedural perspective, several components describing decision points and feedback processes along the modelling pathway have been identified. This forms a new GMP scheme different from the so far published ones as it incorporates all the feedback loops active during the modelling process. It therefore breaks the so far common circular approach. The new scheme emphasises the fact that every model formation is a social, communicative process at all phases of a modelling project.Additionally, we have gained new insights into the path dependency of model structures and identified an extended hierarchical structure of social modelling steps. Most importantly, we describe how the iterative application of these two perspectives should be used to improve the GMP of an active modelling project.

El papel de los <i>food system living labs</i> en el establecimiento de sistemas agroalimentarios sostenibles y resilientes en Colombia

Agrifood systems are crucial in food security, sustainability, and social equity. In a global context marked by challenges such as climate change and population growth, it is essential to propose new methodologies to understand the complex interconnections between the different actors and activities of the food system. In this context, food system living labs (FSLL) emerge as an effective strategy to generate alternative solutions that enable an efficient transition to resilient and sustainable agrifood systems. This review explores the concept and relevance of food system living labs, focusing on their importance, the innovations implemented, the economic, social, and environmental impacts they generate, and the challenges and successful strategies in their implementation. In addition, it analyzes four key aspects for their success: i) collaborative innovation platforms, ii) innovation for sustainability, iii) experimentation in real environments, and iv) development and adoption of new technologies, all within the framework of multisectoral participation and co-creation processes with local actors in rural and urban contexts. Finally, it proposes a model for implementation in Colombia.

Concept of a Diagnostic System for Measuring the Electron Temperature Profile of Plasma from the Intensity of Electron Cyclotron Emission for the TRT Facility

The paper presents a concept of the ECE diagnostic for the TRT facility and estimates the achievable measurement parameters in the baseline scenario. The target spectral region for the diagnostic corresponds to the first harmonic of the ECR frequency in ordinary polarization (O1) and the second harmonic in extraordinary polarization (X2). It is proposed to carry out measurements from the low-field side along two lines of sight: radial and toroidally oblique. The accessible spectral region in terms of the normalized radial coordinate is approximately estimated as –0.9 to 0.9 and –0.1 to 0.9. It is proposed to shape the input wave beam by means of a quasi-optical focusing system that provides a transverse size of the resolved region of approximately 3—5 cm for O1 and 1.2—3 cm for X2. For measurements, it is proposed to use Fourier transform spectrometers with a time resolution of about 10 ms and multichannel heterodyne receivers with a time resolution of about 1 μs. The minimum radial size of the resolved region is estimated to be 3—5 cm for O1 and 2—4 cm for X2, depending on the coordinate.

Two-tone RF signal phase drift measurement system

Modern electronic circuits designed for various applications, such as telecommunications, radar systems, and high-energy physics experiments, require increasing performance of RF signal phase (propagation delay) drift in the signal chain reaching millidegree (or femtosecond) stability levels at hundreds of MHz or GHz frequencies. Therefore, long-term phase change measurements are getting difficult and sensitive to effects rarely considered in earlier designs. Consequently, new and more precise techniques for phase drift measurements and compensation must be developed.This paper presents the concept of a novel RF signal phase drift measurement system based on a unique two-tone approach to accurately measure the phase drift, providing an improved alternative to traditional measurement methods. The idea can be used in systems with digital signal processing of measurement signals. An auxiliary (2nd tone) signal is introduced in the RF chain to allow for extracting phase changes introduced by the system components.The principles of the system are explained, including mathematical basics. Next, a detailed description of a sample system, illustrating how the concept can be practically implemented, is presented. The measured test system achieved a temperature coefficient of a signal propagation delay of just 0.67 fs/°C @ RF frequency of 162.5 MHz. The paper concludes by discussing the system’s performance and highlighting its strengths and limitations. Furthermore, the authors outlined plans for future research and potential improvements to the system.

An absolute abstraction of person in person-centred care: A contemporary issue

BackgroundExtensive nursing literature exists on the term person-centred care. Nevertheless, there is scant literature defining or explicating the concept. Rather, necessary contextual pre-conditions are often presented under the guise of explicit definitions. Person-centredness appears to be explained as a culture that could allow person-centred care to exist. This raises problems knowing what is being provided and what is being received in a person-centred care experience. Contemporary issueWithin a caring space, a nurse providing person-centred care assumes an ontological perspective to provide such care. Specifically, it is typically assumed that the care giver is oriented to a single objective reality and the needs and desires of the care receiver can and should be judged from that perspective. However, when perceived reality noticeably differs between people, this ontological position may not hold. This is particularly apparent when a care receiver is experiencing dementia or other conditions which appear to alter conscious experience. This fundamental problem raises the contemporary issue of the nature of consciousness, as reality is perceived in the context of consciousness. DiscussionSome recent evidence such as that presented by Hoffman, suggests that consciousness may be more fundamental than physiology. This may form a basis for connecting with and understanding the experience of another. Consistent with this perspective, we introduce the concept of a Multiple Ego State System (MESSy). This concept may be a starting point for a theory-based person-centred approach to nursing which truly honours the perspective of the care receiver. ConclusionsAn ontological position inclusive of all individual realities as parts of one consciousness is an attractive position for the theoretical placement of person-centred care. Foundational work is therefore needed to explicate this concept.

Hambatan pengoperasian variabel teknis Pemilu terhadap keterwakilan perempuan di DPR

The low representation of women in the Indonesian DPR (People's Consultative Assembly) indicates a problem with the electoral system. Women's concerns cannot be translated into policy if they are not directly involved in decision-making. The study aims to identify the factors that contribute to the low representation of women in the DPR, specifically examining the operation of indirect and direct election technical variables. The research uses a literature review approach to understand the concepts of the electoral system, democracy, the party system, and affirmation policies. The findings reveal that the affirmation policy, which focuses primarily on the election formula, is insufficient to guarantee women's representation in the DPR. Other technical variables are considered detrimental to women's representation. Despite the implementation of the affirmation policy, the number of women in the DPR has not reached a critical mass from the 2004 to 2019 elections.

The Acquisition of Spanish as a Foreign Language: a Lexical-enactive Approach

The purpose of this article is to demonstrate how the environment is responsible for the construction of the lexicon in the acquisition of a foreign language and, in particular, Spanish as FL. Our study focuses on the acquisition of Spanish by Italian learners. It takes into consideration the existence, for these learners, of a unique conceptual system, but with branches for the acquisition of a foreign language that arise, not so much from the conceptual system directly, but from the L1. We who are not native speakers can come into contact with our lexicon through the experience we have had with the L1. Whoever learns an L2, especially at an A1-A2 level, looks for expressions in his L1 to translate them into the L2 through their mental construction, while a native will extract the information directly, concretizing the experience of emotion without going beyond the L1: all this is regulated, at a neurophysiological level, by the prefrontal cortex that controls the lexicon. What we will try to argue in this article is the way in which a lexical-enactive approach in teaching Spanish as FL can be very useful when acquiring lexical competence in a foreign language.

Ill-structured on respiratory system: How does the contextual problem improve students’ problem-solving skills by developing electronic worksheet?

This research aims to develop an electronic student worksheet based on respiratory problem to improve problem-solving skills on the respiratory system concept. This research and development (R&D) using 4D model proposed by Thiagarajan consist of define, design, develop, and disseminate. E-worksheets were validated by three experts, i.e. the material experts, media experts, and biology teacher as a practitioner. The result of the research showed that the e-worksheet developed had an average validity percentage of 81.85% with a very good category. While the e-worksheet readability was 96.67% (very good). Furthermore, either the teacher or students shows that the field trial test of the e-worksheet had good criteria due to their responses of 94.58% and 88.39%, respectively. The research results shows that there is an increase on students’ problem-solving skills based on the N-gain score of 0.47 and classified as medium category. Based on these results, it can be concluded that e-worksheet is very suitable for use in learning activities and can improve student’s problem-solving skills.

Heavy‐duty conceptual engineering

AbstractConceptual engineering is the process of assessing and improving our conceptual repertoire. Some authors have claimed that introducing or revising concepts through conceptual engineering can go as far as expanding the realm of thinkable thoughts and thus enable us to form beliefs, hypotheses, wishes, or desires that we are currently unable to form. If true, this would allow conceptual engineers to contribute to solving stubborn problems – problems that cannot be solved with our current ways of thinking. We call this kind of conceptual engineering heavy‐duty conceptual engineering. As exciting as the idea of heavy‐duty conceptual engineering sounds, it has never been developed or defended. In this paper, we pursue a two‐fold goal. First, to offer a theory of heavy‐duty conceptual engineering that distinguishes it from other kinds of conceptual engineering; second, to show that heavy‐duty conceptual engineering is possible, both in theory and in practice, and to explain how it can be applied in the service of solving stubborn problems. The central idea is that heavy‐duty conceptual engineering can enhance the semantic expressive power of a conceptual system by the use of bootstrapping processes.

Standalone green hydrogen production powered by photovoltaic panels and solar atmospheric water harvesting hybrid system: Experimental investigation

The current study experimentally investigates the performance of a hybrid standalone solar system of atmospheric water harvesting (AWH) and solar photovoltaic powering electrolyzer for green water and green hydrogen production. The system prototype is designed, constructed, and tested under outdoor summer and winter climate conditions of Alexandria, Egypt at different operating and design enhancement conditions. Water electrolyzes concept for green hydrogen production system driven by a photovoltaic panel and silica gel absorption/desorption atmospheric water harvesting solar still concept with insertion of porous sheet metals for freshwater production is performed and evaluated. The results show a rise of the AWH freshwater production of (60% and 120%) and (146% and 260%) in summer and winter, respectively with the insertion of one and two porous metal sheets, respectively. The maximum rise of the AWH efficiency is 82% in summer and 53.4% in winter by using 2 porous metal sheets. The hydrogen production rate of the system in summer is higher than that of winter by about 25%. System efficiency is almost doubled when electrolyzer KOH concentration increased from 4 gm/kg to 12 gm/kg water. The average daily system efficiency of the AWH, electrolyzer, and overall system reaches 11.6%, 65.1%, and 2.6% when operating at a KOH concentration of 12 gm/kg with two porous metal sheets. The study contributes to achieving mainly SDG goals 6, 7, and 13.

Performance evaluation of agrivoltaic system for the synergy among greengram (Vigna radiata L. Wilczek) production and solar electric power generation

AbstractThe concept of agrivoltaic, combining agriculture and solar photovoltaic system, is ideal for populous countries like India as it provides access to eco‐friendly power and crop production from the same land. The main objective of the study was to evaluate the performance of agrivoltaic systems for different geometry of solar photovoltaic strings and their suitability for agricultural practices for the greengram (Vigna radiata L. Wilczek) crop under North‐Gujarat agro‐climatic conditions of India. Eight equal‐capacity strings with different geometry were designed to evaluate power generation and crop production beneath the strings. The experiment involved eight strings taken as eight treatments and the traditional system of greengram (V. radiata L. Wilczek) cultivation practices is taken as the ninth treatment. The greengram (V. radiata L. Wilczek) was shown and all other cultural practices was kept same upto grain yields. The results revealed that 10.5 feet height string with continuous solar panel pattern) provided the highest gross income (Rs. 24,364.00) from power generation and greengram (V. radiata L. Wilczek) yield. In terms of net realization, a 6.0‐feet string with continuous solar panel pattern provided the highest net return of Rs. 12,417.00, as the capital cost was less for the system. Treatment‐5, which involved transparent panels, was found to be better for the photosynthesis process of the greengram (V. radiata L. Wilczek) crop, as it provided the highest yield (12.99 kg) under the agrivoltaic system.

Local dual spaces and primary decomposition

Generalizing the concept of the Macaulay inverse system, we introduce a way to describe localizations of an ideal in a polynomial ring. This leads to an approach to the differential primary decomposition as a description of the affine scheme defined by the ideal.

Specific road safety issues in LMICs: an overview and some illustrative examples

This paper gives an overview of the work of PIARC Working Group 3.1.1 ‘Specific road safety issues for LMICs’. The working group performed its activities in the period 2019–2023. We prepared two deliverables: (a) a literature review, and (b) an overview of illustrative examples. The review started from the notion that the road safety problem requires a multi-disciplinary approach. The safe system approach is generally considered as the central concept for this purpose and this starting point is also taken in this study. However new directions are needed to make the safe system concept work in LMICs. The period of the first UN Decade of Action for Road Safety has brought us a series of valuable problem analysis and overview articles prepared by a variety of institutions and institutes. As a PIARC working group we did not repeat this effort, but used it as a starting point to indicate which specific issues do require a boost in LMICs for the coming period up to 2030. We concluded that the following 12 issues deserve special attention. Strategical: (i) Sustainable Development Goals integral approach, (ii) safety culture, (iii) road safety management and leadership, (iv) building road safety expertise and science; Tactical: (v) transportation system as a whole, (vi) city design, architecture, land use, rural planning, (vii) cost effectiveness, (viii) legislation and enforcement; Operational: (ix) speed, (x) sustainable safe roads, (xi) vehicles as a safe system component, (xii) post-crash health care. As a result of our discussions and analyses we also concluded that it is worthwhile and necessary to make a distinction between the issues in terms of levels of approach. Making roads and vehicles safe may be considered as operational safety measures on a component level, whereas city design and transport system issues do represent a more tactical approach. On top of that, organisational and cultural aspects do have a more strategical nature. As in many managerial and planning tasks the distinction between strategical, tactical and operational levels of approach is needed in the road safety field. It illustrates that the Safe System concept asks for a multi-level vision, thus preventing a silo approach with a limited focus on human behaviour, safe roads or vehicle safety. A further analysis for each of the selected issues resulted in priority areas, i.e. topics that deserve special attention in the LMIC context. In a similar line of reasoning we also described illustrative examples, i.e. LMIC related before-after studies that show the perspective of certain measures on an evidence basis. Although we found some illustrative cases for each of these issues, our search for evidence based cases confirmed the findings from recent overview articles indicating the lack of LMIC related road safety research. A more widespread implementation of effective road safety measures in LMICs would require a stronger national commitment and leadership from the road safety agencies point of view in the first place. Moreover an evidence based policy asks for a strong national and regional knowledge infrastructure. Ultimately road safety policies and road safety research programs are to be considered as inseparable. A strong local knowledge infrastructure may thus become the basis for an effective national road safety policy.

Static and Transient Response Analysis of Arbitrary Laminated Composite and Sandwich Shells by the FSDT Meshless Method

This paper, for the first time, presents a novel meshless method based on the first-order shear deformation theory (FSDT) and moving-least squares (MLS) approximation to carry out static and transient response analysis on arbitrary laminated and sandwich shell structures. The novelty of the method lies in the implementation of MLS in the curvilinear shell formulation, and the derivation of meshless governing equations on the static and transient response of arbitrary laminated and sandwich shells according to the principle of minimum potential energy and Hamilton’s principle, respectively. The concept of a Convected coordinate system is adopted to deal with arbitrary curvilinear surfaces. Both the position and displacement vectors of shells are approximated by MLS, which is conceptually the same procedure as that in the isoparametric finite element method (FEM). The numerical integration of the stiffness matrices is conducted by the simple Gaussian integral in the Convected coordinate system. Because the moving-least squares (MLS) approximation does not satisfy the Kronecker delta condition, the full transformation method is used to modify the meshless governing equations. Numerical examples are calculated to investigate the static and transient response analysis of laminated and sandwich structures with different geometrical shell shapes, including square plates, spherical shells, doubly-curved shells, and cylindrical shells. The numerical tests show that the proposed method is reliable, and robust and produces accurate results compared to the analytical and numerical solutions taken from the previous literature.

Development and Application of IoT-Based Emotional Lighting System: Focusing on Emotion Analysis Using Instant Message Data

ABSTRACT Research on human-centric lighting (HCL) is actively being conducted to provide an optimal lighting environment that takes into account the physical and mental states of humans, as well as energy savings and improvements in convenience. This study is a proof-of-concept study that proposes and implements the concept of an IoT-based emotional lighting system using instant message (IM) data. The system we propose performs emotion analysis based on IM data to automatically control the lighting environment of the home according to the emotional state of the occupants when they return home. The lighting system was programmed using Node-RED to extract only the necessary data for emotion analysis from IM data, translate it into English, and perform emotion analysis in IBM Cloud’s Natural Language Understanding (NLU) to adjust the color of the lighting according to the emotional state of the occupants. Based on previous studies that demonstrated the effect of color on emotion regulation, this study selected lighting colors that are appropriate for the emotional state of occupants. The operability of the system was then tested through its implementation in a mock-up studio. Our proposed emotional lighting system, which utilizes IM data, enhances convenience by minimizing the need for occupants to manually intervene. Furthermore, this system can be effortlessly implemented in any personal space and offers scalability due to its seamless integration with other smart devices.