Practical Point Research Articles

일본 근대 다인 타카하시 요시오(高敎義雄)의 사상과 미학

Takahashi Yoshio's position in Japan's modern tea ceremony is important. TaishomeikiKan and KinseiDouguIdousi, the masterpieces of his compilation of Japanese tea utensils at the time, have an important position in both tea utensils and art. After the Meiji Restoration, Japan had a strong tendency to break off the old practice and pursue practicality. Art was also dealt with from a practical point of view. Takahashi Yoshio', a student of Fukuzawa Yukichi, a strong enlightenment theorist of Japan, took the lead in the modernization of Japan more than anyone else. When it comes to the tea ceremony, however, it is recognized as a unique Japanese tradition that must be observed. Nevertheless, emphasizing the financial and political utility of the tea ceremony and utensils helps match the modern and traditional tea ceremony of the Meiji Restoration.

К оценке техникo-эксплуaтaциoннoгo сoстoяния гoрoдских железoбетoнных мoстoв и путепрoвoдoв

To consider the issue of assessing the technical and operational condition of urban reinforced concrete bridges and overpasses. Study technical passports of about 300 reinforced concrete bridge structures in Tashkent. Analyze in detail and formulate the main technical and operational indicators (TEI) as criteria for assessing the technical condition of bridge structures in Tashkent. Methods: methods for assessing the technical condition of the city’s bridge park objects have been determined — absolute and relative. For this purpose their purposes are indicated. Results: the statistics were compiled on the basis of the bridge park of the city of Tashkent, carried out by the authors of a survey of 30 city bridge structures. Based on the results of the examination of selected bridge structures, it was established that the main damage to the spans and supports of reinforced concrete bridges and overpasses is caused, first of all, by the poor condition of waterproofing, expansion joints and lack of water water pipes. The main technical and operational indicators (TEI) are formulated as criteria for assessing the technical condition of bridge structures in Tashkent, such as “safety and traffic comfort”, “durability”, “load capacity”, “throughput”, and “maintainability”. Practical importance: taking into account the specifics of a large metropolis, managing the technical condition of bridge structures in Tashkent is an extremely responsible and complex task. For use in practical operation of reinforced concrete bridge structures as the most widespread objects of the city’s road transport infrastructure, a statistical analysis was performed. From a practical point of view, this information will make it possible with a sufficient degree of probability to ensure and maintain the specified regulatory (design) levels of reliability, safety and durability of bridge structures.

PRR30, pRR3.25% and Asymmetrical Entropy Descriptors in Atrial Fibrillation Detection.

Early detection of atrial fibrillation (AF) is essential to prevent stroke and other cardiac and embolic complications. We compared the diagnostic properties for AF detection of the percentage of successive RR interval differences greater than or equal to 30 ms or 3.25% of the previous RR interval (pRR30 and pRR3.25%, respectively), and asymmetric entropy descriptors of RR intervals. Previously, both pRR30 and pRR3.25% outperformed many other heart rate variability (HRV) parameters in distinguishing AF from sinus rhythm (SR) in 60 s electrocardiograms (ECGs). The 60 s segments with RR intervals were extracted from the publicly available Physionet Long-Term Atrial Fibrillation Database (84 recording, 24 h Holter ECG). There were 31,753 60 s segments of AF and 32,073 60 s segments of SR. The diagnostic properties of all parameters were analysed with receiver operator curve analysis, a confusion matrix and logistic regression. The best model with pRR30, pRR3.25% and total entropic features (H) had the largest area under the curve (AUC)-0.98 compared to 0.959 for pRR30-and 0.972 for pRR3.25%. However, the differences in AUC between pRR30 and pRR3.25% alone and the combined model were negligible from a practical point of view. Moreover, combining pRR30 and pRR3.25% with H significantly increased the number of false-negative cases by more than threefold. Asymmetric entropy has some potential in differentiating AF from SR in the 60 s RR interval time series, but the addition of these parameters does not seem to make a relevant difference compared to pRR30 and especially pRR3.25%.

Combating Economic Crime in Ukraine In Conditions of Sustainable Development

Purpose: The study is devoted to clarifying the system of law enforcement agencies of Ukraine in the field of prevention and counteraction of economic crime, determining the directions of transformation of individual agencies in order to improve the efficiency of their activities in this area. Methods: The methodological basis of the study was general philosophical and general scientific methods of learning phenomena and processes: theoretical generalization, analysis and synthesis, induction and deduction, systematization, analogy, systematization, generalization, bibliometric analysis, modeling. Results and discussion: It was established that economic crimes are threats to the economic security of the state, consisting in the implementation of illegal economic activity (economic processes, relations, operations) or violation of requirements for legal economic activity to satisfy the selfish interests of a person or a group of persons. The specific features of economic crime prevention and counteraction entities that implement the law enforcement function in Ukraine as a component of economic security in conditions of sustainable development are highlighted. The procedure and forms of interaction of law enforcement agencies in the specified area under martial law conditions have been determined. Proposals were made to the legislation to increase the efficiency of the Economic Security Bureau of Ukraine as an analytical law enforcement agency in countering economic criminal offenses. Implications of the research: This research has theoretical and applied significance. From the theoretical side - to determine the essence and content of economic crime, to clarify the system of law enforcement agencies of Ukraine in the field of prevention and counteraction of economic crime. From a practical point of view, proposals of a theoretical, methodological and legislative nature will contribute to the development of the most effective ways of combating crime in this area, will help to understand the place and role of such a law enforcement body with a special status as the Bureau of Economic Security in the specified activity of the state. Originality/value: The tasks of law enforcement agencies in combating economic crimes in the conditions of martial law and hybrid warfare are becoming extremely important in many countries, as they are aimed at ensuring the financing of defense capabilities and ensuring sustainable development. The author's proposals formulated in the research will contribute to the understanding of economic crime, form an idea about the powers and directions of improvement of the activities of law enforcement agencies in combating crime in this area.

Flexible serial capacity allocation with intensive care application

Serial delay structures are of natural and practical interest, as in production, communications and health care. Flexible service allocation might well be beneficial, particularly to handle overflow. The availability of bed capacity for Intensive Care (IC) provision was prominent in hospitals during the corona period. By integrating an Intensive Care Unit (ICU) with a flexible Step Down Unit (SDU) for intensive care overflow, IC availability might be greatly enhanced. This will lead to an unsolvable system that has to be evaluated by numerical computation (or simulation). First, as an approximate modeling and from a computational point of view, it is shown that by an artificial capacity flexibility principle, related to a principle known for parallel structures within telecommunications, an analytic so-called product form expression can be obtained for a flexible serial structure, such as an ICU-SDU complex. The principle will be referred to as serial repositioning (SR). The analytic form appears to be of both theoretical and computational interest. Theoretical as the closed form expression under this principle seems new for a serial structure. For indistinguishable intensive care at the ICU and SDU it is also proven to be insensitive, i.e. to only depend on the IC service by its mean. Computational as it provides easily computable estimates and bounds. For distinguishable overflow services, in contrast, insensitivity is numerically shown not to hold. Nevertheless, from a practical point of view, the insensitivity appears virtually true. Throughout numerical support is provided for small and realistic scale. It shows that the result •provides a reasonable first order of magnitude approximate,•supports an intuitive notion of bounds,•strongly reduces computational times and leads to qualitative results. For example, it shows that full flexibility for overflow service might be most useful but not necessarily required. A reallife academic hospital case is numerically studied. It illustrates that just a small number of flexible beds can well be beneficial. The results can be seen as representative for ICU-SDU dimensioning itself as well as for possible application to other serial structures, such as in flexible manufacturing.

Using Health Claims to Teach Evidence-Based Practice to Healthcare Students: A Mixed Methods Study

Background A multifaceted and interactive teaching approach is recommended for achieving proficiency in evidence-based practice, with critical thinking considered vital for connecting theory and practice. In this context, we advocate the strategic use of health claims in media to promote critical thinking and provide an accessible entry point to evidence-based practice for early-stage university healthcare students. Method We conducted a convergent mixed methods study, including a cross-sectional survey with structured and open-ended questions as well as focus group interviews, at the Faculty of Health Sciences, Oslo Metropolitan University, during the 2020-2021 academic year. Participants were bachelor’s students in bioengineering, physiotherapy, social education, and occupational therapy. We employed a blended learning approach, combining digital learning resources, teaching in critical assessment of health claims and evidence-based practice, and a concurrent group exam assignment centered around health news. The outcome measures included students’ experiences integrating health claims into evidence-based practice teaching and their experiences with teaching approaches, including the group exam. Results Out of 446 participants, 136 (30.5%) responded to the structured questions in the survey. In response to the open-ended questions within the survey, 109 (80.1%) of the respondents shared positive experiences about the course, while 98 (72%) suggested improvements. Additionally, 25 students participated in focus group interviews. Synthesizing the results, we found that students viewed the inclusion of health claim assessment as a useful entry point for learning evidence-based practice. In addition, both the blended learning design and the group exam were identified as contributors to a positive perception of learning outcomes from the course. Conclusions Integrating critical reflection on media health claims into evidence-based practice education, alongside a blended learning approach and a group exam, may be beneficial for educating bachelor’s healthcare students. However, further rigorous study designs are needed to assess the effect of the course on learning outcomes. Registration DOI 10.5281/zenodo.6985449

Climate Litigation in Europe: a Discussion about Emerging Trends in the Context of Principle of Non-regression

The climate crisis is one of the most serious problems that humankind has ever faced. With the adverse consequences of this phenomenon, new practices have emerged in social, economic, and legal structures. One of these new practices is doubtlessly climate litigation that aim to pressure states to fulfil their positive obligations concerning the mitigation of the human-induced climate crisis. Global warming, advancing at an unprecedented rate, is pushing governments to take immediate measures and shape their legislation accordingly. Within this movement, the principle of non-regression, rooted in human rights, has gained a tangible form in environmental law. This study explores the potential role of the climate crisis and, specifically, the climate litigation cases in Europe in establishing the principle of non-regression as a settled principle in environmental law. It discusses its value as an argument in climate litigation from a practical point of view.

Linear-Time Verification of Data-Aware Processes Modulo Theories via Covers and Automata

The need to model and analyse dynamic systems operating over complex data is ubiquitous in AI and neighboring areas, in particular business process management. Analysing such data-aware systems is a notoriously difficult problem, as they are intrinsically infinite-state. Existing approaches work for specific datatypes, and/or limit themselves to the verification of safety properties. In this paper, we lift both such limitations, studying for the first time linear-time verification for so-called data-aware processes modulo theories (DMTs), from the foundational and practical point of view. The DMT model is very general, as it supports processes operating over variables that can store arbitrary types of data, ranging over infinite domains and equipped with domain-specific predicates. Specifically, we provide four contributions. First, we devise a semi-decision procedure for linear-time verification of DMTs, which works for a very large class of datatypes obeying to mild model-theoretic assumptions. The procedure relies on a unique combination of automata-theoretic and cover computation techniques to respectively deal with linear-time properties and datatypes. Second, we identify an abstract, semantic property that guarantees the existence of a faithful finite-state abstraction of the original system, and show that our method becomes a decision procedure in this case. Third, we identify concrete, checkable classes of systems that satisfy this property, generalising several results in the literature. Finally, we present an implementation and an experimental evaluation over a benchmark of real-world data-aware business processes.

Machine Learning-Powered Combinatorial Clock Auction

We study the design of iterative combinatorial auctions (ICAs). The main challenge in this domain is that the bundle space grows exponentially in the number of items. To address this, several papers have recently proposed machine learning (ML)-based preference elicitation algorithms that aim to elicit only the most important information from bidders. However, from a practical point of view, the main shortcoming of this prior work is that those designs elicit bidders' preferences via value queries (i.e., “What is your value for the bundle {A, B}?''). In most real-world ICA domains, value queries are considered impractical, since they impose an unrealistically high cognitive burden on bidders, which is why they are not used in practice. In this paper, we address this shortcoming by designing an ML-powered combinatorial clock auction that elicits information from the bidders only via demand queries (i.e., “At prices p, what is your most preferred bundle of items?''). We make two key technical contributions: First, we present a novel method for training an ML model on demand queries. Second, based on those trained ML models, we introduce an efficient method for determining the demand query with the highest clearing potential, for which we also provide a theoretical foundation. We experimentally evaluate our ML-based demand query mechanism in several spectrum auction domains and compare it against the most established real-world ICA: the combinatorial clock auction (CCA). Our mechanism significantly outperforms the CCA in terms of efficiency in all domains, it achieves higher efficiency in a significantly reduced number of rounds, and, using linear prices, it exhibits vastly higher clearing potential. Thus, with this paper we bridge the gap between research and practice and propose the first practical ML-powered ICA.

How to Make Knockout Tournaments More Popular?

Given a mapping from a set of players to the leaves of a complete binary tree (called a seeding), a knockout tournament is conducted as follows: every round, every two players with a common parent compete against each other, and the winner is promoted to the common parent; then, the leaves are deleted. When only one player remains, it is declared the winner. This is a popular competition format in sports, elections, and decision-making. Over the past decade, it has been studied intensively from both theoretical and practical points of view. Most frequently, the objective is to seed the tournament in a way that ``assists'' (or even guarantees) some particular player to win the competition. We introduce a new objective, which is very sensible from the perspective of the directors of the competition: maximize the profit or popularity of the tournament. Specifically, we associate a ``score'' with every possible match, and aim to seed the tournament to maximize the sum of the scores of the matches that take place. We focus on the case where we assume a total order on the players' strengths, and provide a wide spectrum of results on the computational complexity of the problem.

Integrating Health and Smartness—New Sustainable Paradigms for the Urban Environment: A Case Study in Lianshi Town (China)

The concepts of healthy cities and smart cities are popular in emerging research in the 21st century. This study focuses on the existing interrelations between the two notions in terms of socio-spatial quality, technology, and innovation, particularly regarding industrial sites that no longer have a role and constitute ‘urban voids’ with high volumetric concentrations. The fast expansion of cities and the de-industrialization phenomena have resulted in such void-producing blights that compromise public health; environmental quality; and social, economic, and living conditions. Therefore, the authors intend to emphasize the relevance of citizens’ and communities’ engagement in shaping new healthy and smart urban environments. The present method relies on a literature review to describe the current theoretical and practical dimensions of such topics, identifying synergies and trade-offs. After this, a case study in China is presented to support the discussion. The site, a former granary, is located in Lianshi, a traditional water-edge town in the central area of the Yangtze River Delta. The proposed example enhances solutions that meet healthy and smart requirements, transforming the former industrial area into a social catalyst, acting as an effective motivator for urban development. One such theoretical approach is exemplified by a project that won a national architecture competition in 2018, the ‘Taihu Cultural Heritage Rehabilitation Competition’. The latter is then validated through practical solutions in a real-world context by analyzing the ‘Cuckoo’ project developed in 2021 for the same area. Overall, the integration of healthy and smart elements is proposed by the authors as an effective method to achieve more holistic and sustainable city development from both theoretical and practical points of view.

Modelling the impact of a dam‐break wave on a vertical wall

SummaryDam‐Break waves arise from the sudden release of the water stored behind a wall, and they cause destruction and losses on nearby areas. Characterisation of the impact force on obstacles is very important for risk assessment. In this work, we performed a series of lock‐release experiments to evaluate the wave‐induced impact force on a vertical end wall situated some distance from the lock. Laboratory data were used to evaluate the performance of several types of numerical models to predict the wave‐induced force on the vertical end wall. The selected models were as follows: the hydrostatic 1D De Saint‐Venant model, the multi‐layer hydrostatic model and the Navier–Stokes two‐phase flow. For the latter two models, both 2D (in the ‐ plane) and 3D simulations were performed. The results show that, independently of the hydrostatic assumption, the 2‐D simulations generate nonphysical oscillations which are not present in the measured temporal histories of the pressure and force values. By contrast, the predictions of both 3D numerical models better reproduce the temporal variation of the pressure forces on the end wall. The present study also shows that from a practical point of view, the 1D De Saint‐Venant model predicts with sufficient accuracy the impact time and the magnitude of the peak value of the impact force. Therefore, if the use of a fully 3D models is not a feasible option, in terms of a trade‐off between computation cost and accuracy, the use of a simple hydrostatic 1D De Saint‐Venant model is preferable to a 2D model.

Reasonable adjustments to application of the Medication Safety Standard for adult patients living with intellectual disability in Australian hospital settings

AbstractPurpose of reviewAdults living with intellectual disability experience higher rates of preventable adverse medication events across the medicine pathway compared to their peers without disability.Source of informationThe Medication Safety Standard, developed by the Australian Commission on Safety and Quality in Health Care, describes systems and strategies to ensure that clinicians and health organisations safely prescribe, dispense, administer appropriate medications to informed patients, and monitor their use.Key findingsOptimal application of the Medication Safety Standard for this population requires the development of reasonable adjustments to its action which take into account the barriers to safe medication management experienced by them in hospital settings. Design of such reasonable adjustments is influenced by consideration of the experiences of medicine management within with people living with intellectual disability, with intellectual disability, the roles of disability supports, and the disability‐health sector interface in relation to medication management.ConclusionThis review describes the formulation of a range of practice point reasonable adjustments to the usual clinical processes, content, knowledge, and organisation required in application of the Medication Safety Standard for adult patients living with intellectual disability.

Present and Future Challenges of the Special VAT Scheme for Travel Agents

The special scheme for travel agents and tour operators was designed as a simplification measure to avoid multiple registration obligations for businesses in this sector and to allocate VAT revenues to the Member State of consumption. However, the scheme raises a number of practical difficulties, largely due to the different interpretations of the scheme in the Member States, which makes it difficult for taxable persons to manage. In this article, the author discusses some of these practical difficulties and points out what he believes may be possible future solutions.

The Principle of Constructive Alternativeism and Physical Education. Introduction and purpose of the study

Nowadays, there is an active rethinking of the prospects for the development of physical education in educational institutions. This is manifested, in particular, in the aggravation of discussions about the expediency of using in our time such models of physical education as health-improving and adaptive, socially-oriented, personality-oriented, sports and recteative, which, as you know, differ in their goals and means of achieving them. In the course of these discussions, the proponents of some points of view reject the expediency of paying attention to the other approaches and offer their point of view as the "ultimate truth". In this work, an attempt is made to analyze the experience of getting out of similar situations in modern psychology and apply it to the field of physical education. The purpose of the study is to substantiate the expediency of using the principle of constructive alternativeism in physical education. Material and methods. In the process of research, the method of analysis and generalization of data from scientific and methodological literature was used. Results. The starting point of the study was the idea that approaches to the analysis of models of physical education should be carried out in the practical and theoretical planes. From a practical point of view, it is important to understand to what extent this or that model responds to the current demand of society, the complexity of organizational measures that are necessary for its implementation, the material base, etc. From the point of view of theory, the only thing that matters is to what extent our understanding of physical education as a phenomenon has been deepened and expanded. Conclusions. In the current conditions of martial law in Ukraine, the most expedient is the transition to a socially-oriented model of physical education. In the theory of physical education, it is advisable to focus on the principle of constructive alternativeism.

On prediction-modelers and decision-makers: why fairness requires more than a fair prediction model

AbstractAn implicit ambiguity in the field of prediction-based decision-making concerns the relation between the concepts of prediction and decision. Much of the literature in the field tends to blur the boundaries between the two concepts and often simply refers to ‘fair prediction’. In this paper, we point out that a differentiation of these concepts is helpful when trying to implement algorithmic fairness. Even if fairness properties are related to the features of the used prediction model, what is more properly called ‘fair’ or ‘unfair’ is a decision system, not a prediction model. This is because fairness is about the consequences on human lives, created by a decision, not by a prediction. In this paper, we clarify the distinction between the concepts of prediction and decision and show the different ways in which these two elements influence the final fairness properties of a prediction-based decision system. As well as discussing this relationship both from a conceptual and a practical point of view, we propose a framework that enables a better understanding and reasoning of the conceptual logic of creating fairness in prediction-based decision-making. In our framework, we specify different roles, namely the ‘prediction-modeler’ and the ‘decision-maker,’ and the information required from each of them for being able to implement fairness of the system. Our framework allows for deriving distinct responsibilities for both roles and discussing some insights related to ethical and legal requirements. Our contribution is twofold. First, we offer a new perspective shifting the focus from an abstract concept of algorithmic fairness to the concrete context-dependent nature of algorithmic decision-making, where different actors exist, can have different goals, and may act independently. In addition, we provide a conceptual framework that can help structure prediction-based decision problems with respect to fairness issues, identify responsibilities, and implement fairness governance mechanisms in real-world scenarios.

Assessing the Curvilinear Relationship in Employee Digital Performance: A Task-Technology Fit Perspective

In the context of the digital economy, one of the most important issues facing business managers is that of how to improve employee digital performance (EDP), however, extant studies exploring this problem are quite limited. The purpose of this paper is to investigate how the characteristics of task and technology represented by enterprise social media (ESM) affect task-technology fit (TTF), which in turn affects EDP. Using TTF theory, this paper proposes a research model to validate the research question. An ordinary least squares method is used to analyze 284 questionnaire responses drawn from 33 provinces in China. The results indicate that task complexity has an inverted U-shaped effect on TTF, whereas task interdependence has no effect on TTF. Work-related function of ESM has a U-shaped effect on TTF, while social-related function of ESM has a positive effect on TTF. TTF positively influences both employee digital-enabled task performance and employee digital-enabled innovative performance. Employee digital literacy strengthens the impact of TTF on employee digital-enabled task performance, but does not moderate the relationship between TTF and employee digital-enabled innovative performance. Organizational digital culture strengthens the impacts of TTF on both employee digital-enabled task performance and employee digital-enabled innovative performance. From a theoretical perspective, this paper makes a contribution to TTF theory by revealing the curvilinear relationship between the characteristics of task, the characteristics of ESM technology and TTF. This paper also contributes to the EDP literature by clarifying how TTF affects EDP, and by identifying the boundary conditions (namely employee digital literacy and organizational digital culture) between TTF and EDP. From a practical point of view, this paper provides managers with the insights to improve EDP in terms of task assignment, employee training, enterprise culture building, etc.

Running up that hill: a literature review and research agenda proposal on “gazelles” firms

AbstractIn recent years, “gazelles”—a small set of high-growth firms—have attracted considerable interest from researchers for their capacity to contribute significantly to the competitiveness of nations. However, in management literature, the research on this topic is still incomplete, and a broad but focused review is needed to understand the phenomenon fully. Therefore, the paper aims to analyse in depth the literature on “gazelles” published in the Business, Management, and Accounting and Decision Sciences fields, shedding light on opportunities arising from emerging research topics related to the phenomenon. In meeting this aim, the work is built on a systematic literature review, and Elsevier’s Scopus database was selected and scanned to access publications. The analysis identifies in the sample under investigation the quantitative characteristics (temporal distribution of publications, journals included in the sample, and methodological approach adopted by authors), as well as seven main topics resulting from the qualitative coding process (performance, policy and employment, innovation, entrepreneurship, corporate governance and decision-making, human resources, and strategy). Finally, a comprehensive outlook and a critical analysis of the state-of-the-art research on these specific high-growth firms have been provided through the proposal of a conceptual framework. This study also proposes a research agenda for scholars while providing insightful suggestions from a practical point of view.

Fenton-Like Reaction: Recent Advances and New Trends.

The Fenton reaction refers to the reaction in which ferrous ions (Fe2+ ) produce hydroxyl radicals and other reactive oxidizing substances by decomposing hydrogen peroxide (H2 O2 ). This paper reviews the mechanism, application system, and materials employed in the Fenton reaction including conventional homogeneous and non-homogeneous Fenton reactions as well as photo-, electrically-, ultrasonically-, and piezoelectrically-triggered Fenton reactions, and summarizes the applications in the degradation of soil oil pollutions, landfill leachate, textile wastewater, and antibiotics from a practical point of view. The mineralization paths of typical pollutant are elucidated with relevant case studies. The paper concludes with a summary and outlook of the further development of Fenton-like reactions.

Counter-ion adsorption and electrostatic potential in sodium and choline dodecyl sulfate micelles - a molecular dynamics simulation study.

Choline-based surfactants are interesting both from the practical point of view to obtaining environmental-friendly surfactants as well as from the theoretical side since the interactions between the choline and surfactants can help to understand self-assembly phenomena in deep eutectic solvents. Although no significant change was noticed in the micelle size and shape due to the exchange of the sodium counter-ion by choline in our simulations, the adsorption of the choline cation over the micelle surface is stronger than the adsorption of the sodium, which leads to a reduction of the exposed surface area of the micelle and remarkable effects over the electrostatic potential. The choline neutralizes the surface charge of the surfactant better than sodium; however, this is partially compensated by a stronger water orientation around the SDS micelle. The balance between the contributions from the surfactant, the counter-ion, and water to the electrostatic potential leads to a complex pattern with alternate regions of positive and negative potential at the micelle/water interface which can be important to the incorporation of other charged species at the micelle surface as well as for the interaction between micelles in solution. To evaluate the effects of the counter-ion substitution, micelles of sodium dodecyl sulfate (SDS) and choline dodecyl sulfate (ChDS) were studied and compared by means of molecular dynamics simulations in aqueous solution. In both cases, the simulations started from pre-assembled micelles with 60 dodecyl sulfate ions and 240-ns simulations were performed at NPT ensemble at T = 323.15K and P = 1bar using the Gromacs software with the OPLS-AA force field to describe dodecyl sulfate and choline, Åqvist parameters for sodium, and SPC model for water molecules.