bluuebunny/crossref_metadata_2025 huggingface dataset:
Rope Tensioning System in a Large-Sized Horizontal Turntable
Authors: JASIŃSKI W.
Published: October 2024

Abstract. The study presents practical solutions for the design considerations of a rope tensioning system in a large horizontal turntable. The analyzed turntable is designed for rotating large-sized wheeled military vehicles such as the Jelcz 882 or KTO Rosomak, as well as tracked military vehicles such as the Leopard tank. The control of the rope tension force is illustrated using proprietary solutions for tensioning devices. Kinematic and dynamic analyses were performed using the “dynamic analysis” environment of the Autodesk Inventor Professional 2021 modelling software.
Comparative Analysis of the Strain in Composite Rings Fabricated with Fibre Prestressing
Authors: KRYSIAK P.
Published: October 2024

Abstract. The presented work addresses issues related to the manufacturing and testing of composite rings made of glass fibres and epoxy resin. Rings equivalent to a segment of a composite tube were prepared for the study. During the winding process, the tension force of the fibre bundle was varied to induce pre-stresses. After curing the samples, fibre optic sensors containing Fiber Bragg Gratings (FBG) were attached to their outer surface. Subsequently, the rings were cut along the generator, resulting in noticeable displacements of the cut planes. Thanks to the sensors used, it was possible to determine the circumferential deformations induced by the initial stresses in the manufactured composites.
Modern Vehicle Armor Technologies
Authors: OLSZEWSKI Dawid
Published: October 2024

Abstract. The article explores modern approaches to armoring vehicles exposed to kinetic threats. It discusses the advantages and disadvantages of various solutions compared to other materials. The study concludes with recommendations underscoring the need for continued scientific research to advance ballistic armor technology, thereby enhancing the safety of drivers, operators, crews, and passengers. The article aims to summarize the current body of knowledge on vehicle armor and to raise awareness of this important topic.
Effect of Ash from Thermal Conversion of Municipal Waste on the Strength Parameters and Frost Resistance of Cement Mortars
Authors: PIETRZAK A.
Published: October 2024

Abstract. The paper presents the possibility of using waste, fly ash, generated in the process of thermal conversion of municipal waste in cement mortar technology. For the study, fly ash in the amount of 5% to 30% by weight of cement was used as a substitute for sand. A total of 7 different cement mortars were made, including a standard (control) mortar. The following tests were performed for the prepared samples: flexural and compressive strength after 7 and 28 days of maturation, frost resistance, water absorption, and consistency test for fresh mortars.
Mechanical Properties of Metal Expansion Joint Manufactured by Mechanically Assisted Laser Forming
Authors: TOFI S.
Published: October 2024

Abstract. The presented article describes the general principle of operation of metal expansion joint (MEJ) manufactured by mechanically assisted laser forming. These details are important elements designed to compensate for temperature differences and limitations of construction materials. The authors described and analyzed the traditional method of producing metal expansion joints and drew attention to its limitations and potential problems. This work mainly focused on strength tests. The resistance of the MEJ to tensile forces was tested. The rest of the article presents the results of strength tests of the proposed method of hybrid production of MEJ. The authors focused mainly on the recorded parameters of the testing machine and the stretching process. The results are presented in graphs. The results of the tests confirmed that the proposed method is effective and efficient, enabling precise control of the production process of metal expansion joints.
Life Cycle Assessment (LCA) of Truck Steel Wheels
Authors: PACANA A.
Published: October 2024

Abstract. The automotive industry is one of the main sources of greenhouse gas emissions. Therefore, various solutions are sought in automotive products that will eliminate their negative impact on the environment. The objective of the article was to analyze the environmental impact of a truck steel wheel during its life cycle (LCA) in terms of ecological footprint. The method was life cycle assessment (LCA) according to ISO 14040. The environmental impact analysis was carried out using the OpenLCA program with the ecoinvent v3.10 database. The ecological footprint included impacts for the following categories: carbon dioxide (CO2), land occupation, and nuclear. The total impact on the life cycle of the analyzed truck wheel (with the adopted assumptions) in terms of ecological footprint was estimated at 7.31E+09 m2a. The main environmental burdens were: heat production, heat and power cogeneration, uranium production, electricity production, and underground uranium mine’s operation. The results may be useful for improving the processes for creating steel truck wheels. Therefore, future research will focus on developing and analyzing different scenarios of steel truck wheel solutions for the main environmental loads identified from the ecological footprint.
Identification of Non-Compliance of Children's Products Based on Ishikawa Diagram
Authors: CHWIST Katarzyna
Published: October 2024

Abstract. Qualitative analysis of produced goods, particularly the analysis of the causes of non-compliance, is crucial for every company as it directly impacts the satisfaction of customers who utilize such products. The fishbone diagram is the most popular tool that can be effectively utilized for such analysis in a straightforward manner. In the studied company, this diagram was employed to analyze the issue of unsatisfactory product quality. Through brainstorming, potential causes of the problem were organized and appropriately classified in the article. The aim was to implement corrective actions and focus on key areas that cause the most waste.
Analysis of the Surface Geometric Structure after Laser Cleaning of Paint Coatings
Authors: RADEK N.
Published: October 2024

Abstract. Numerous research centers all over the world are being involved in the studies of laser surface modification. By controlling laser parameters such as the amount of power, scanning speed, and pulse duration, it is possible to form coatings with different surface properties, including surface geometry, microhardness, stress states, or resistance to wear. The paper analyzes the influence of selected parameters of laser processing on the removal of paint coatings used for the purpose of special use of armaments and military equipment. By controlling the laser processing parameters, i.e., power density, feed rate, pulse frequency, and duration, the best processing conditions were selected at which masking coatings were removed. In order to clean the surface, laboratory tests were carried out to remove the paint coating using the surface layer cleaning technique using a picosecond laser TruMicro 5325c with UV radiation (343 nm). As part of the research, measurements of the surface geometric structure, hardness, and adhesion, as well as observations of the microstructure, were made.
Multiphysics Modeling of Direct-Start Induction Motor Considering Rotor Unbalance
Authors: GOROSHKO Andrii
Published: October 2024

Abstract. The paper proposes a multiphysics model of the dynamics of an induction motor with a squirrel-cage rotor, taking into account the forced vibrations caused by the mass and magnetic eccentricity of the rotor. The model is based on numerical modeling of the motor operation, analytical modeling of the motor oscillations with a rotor containing mass eccentricity and numerical modeling of the motor oscillations with a rotor containing static and dynamic magnetic eccentricity. The model makes it possible to simulate vibrations of rotors and induction motor casings with account of moments of unbalanced forces of mechanical and electromagnetic nature. The model takes into account the polyharmonic nature of vibrations and makes it possible to study their effect on the electrical and energy parameters of the motor during acceleration during direct start and in steady-state mode. As a result of numerical simulations of a three-phase induction motor, it was found that the maximum permissible vibrations increase power consumption by 5% in steady-state mode and by 10% during direct start.
The influence of a coordination training model that uses various manipulative movements on futsal kick accuracy
Authors: Priyambada Galih , Raharja Andri Tria , Julianur Julianur , Rismayanthi Cerika , Ristiana Pitra Ashrin
Published: October 2024

Achieving precise kick accuracy and coordinated movements in futsal was essential for competitive success. This study aimed to evaluate the differences between various futsal training approaches that incorporated distinct coordination exercises involving manipulative movements, specifically assessing their impact on kick accuracy. A quasi-experimental design with a control group was employed, focusing on shooting skills within the futsal context. The population consisted of 70 members from the Universitas Muhammadiyah Kalimantan Timur (UMKT) futsal team, from which 40 players were purposively selected based on their participation duration of over six months and their tier status within the university's core teams. Participants were divided into two groups: one received static coordination training (control group), and the other underwent dynamic coordination training (experimental group), each comprising 20 players. The intervention spanned 18 sessions, including pre- and post-tests. Data were collected through a modified shooting kick test at the futsal goal, utilizing a point distribution system. Analysis revealed significant differences in kick performance between the two training methods, with dynamic coordination training yielding superior results (t-count = 3.010 t-table = 2.024). These findings indicated that dynamic coordination exercises were more effective than static ones in enhancing futsal kick accuracy. Future research should have considered expanding the population and sample size to include amateur players, introducing additional variables and diverse training methodologies, extending training duration and frequency, conducting long-term evaluations, measuring shooting technique quality, and employing quantitative research methods. By addressing these suggestions, subsequent studies could contribute more comprehensively to the understanding of effective training strategies in futsal.
Medication Burden and Adverse Cardiovascular Events and Death in Patients Treated with Maintenance Hemodialysis
Authors: Park Cheol Ho , Ko Ye Eun , Heo Ga Young , Kim Bo Yeon , Oh Seong Ju , Han So Young , Park Jung Tak , Han Seung Hyeok , Yoo Tae-Hyun , Kang Shin-Wook , Kim Hyung Woo
Published: October 2024

Key Points

A higher medication burden was associated with a higher risk of adverse events in patients receiving maintenance hemodialysis.

Medication burden can serve as a clinically relevant risk indicator for cardiovascular events and all-cause death in patients on maintenance hemodialysis.

Background

A high medication burden is associated with adverse outcomes. Although patients with ESKD have a substantial medication burden, the relationship between the number of medications in use and clinical outcomes in these patients remains unclear. Hence, this study aimed to investigate the prognostic implications of medication burden regarding adverse outcomes in patients with ESKD on maintenance hemodialysis.

Methods

We analyzed 29,690 patients receiving maintenance hemodialysis who participated in the Periodic Hemodialysis Quality Assessment conducted by the Health Insurance Review and Assessment Service. The exposure of interest was the number of routinely prescribed oral medications. The main outcome was a composite of nonfatal cardiovascular events (nonfatal myocardial infarction, coronary revascularization, nonfatal stroke, or hospitalization for heart failure) or all-cause death (major adverse cardiac and cerebrovascular events [MACCEs]). The secondary outcomes were the individual components of the primary outcome.

Results

During a follow-up period of 146,749 person-years (median, 6.0 years), MACCEs occurred in 17,573 patients (59.2%). Higher medication burden was associated with progressively higher incidence of MACCEs (84.7, 107.2, 130.2, and 168.9 events per 1000 person-years in Q1–Q4, respectively). In a multivariable Cox proportional hazard model, the adjusted hazard ratios (95% confidence intervals) for the second, third, and highest quartiles were 1.05 (1.00 to 1.10), 1.12 (1.07 to 1.17), and 1.27 (1.21 to 1.33), respectively, compared with the lowest quartile. In continuous modeling, each increase in the number of medication was associated with a 1.03-fold (95% confidence interval, 1.03 to 1.04) higher risk of the primary outcome.

Conclusion

A high medication burden was independently associated with higher risk of adverse cardiovascular outcomes and all-cause death in patients receiving maintenance hemodialysis. These findings suggest that a high medication burden could be a useful indicator of adverse clinical outcomes in patients undergoing hemodialysis.
Cost-Effectiveness of Empagliflozin in CKD with or without Albuminuria
Authors: Odawara Motoki , Nishi Hiroshi , Kodera Satoshi , Kondo Masahide , Nangaku Masaomi
Published: October 2024

Key Points

Empagliflozin is cost-effective for the treatment of CKD in patients with an urine albumin-to-creatinine ratio of 30 mg/g or more.

Empagliflozin is not cost-effective for the treatment of CKD in patients with an urine albumin-to-creatinine ratio <30 mg/g.

Background

The Study of Heart and Kidney Protection with Empagliflozin (EMPA-KIDNEY) expanded the CKD population that may benefit from sodium-glucose cotransporter 2 inhibitors in terms of eGFR and urine albumin-to-creatinine ratio. This enables a cost-effectiveness analysis of empagliflozin in subgroups stratified by these two parameters.

Methods

A cost–utility analysis using the Markov model was performed to evaluate the cost-effectiveness of adding empagliflozin to the standard treatment for CKD in Japan over 20 years of observation. Each cohort with the initial eGFR (≥45 but <60 ml/min per 1.73 m2, ≥30 but <45 ml/min per 1.73 m2, or ≥20 but <30 ml/min per 1.73 m2) and urine albumin-to-creatinine ratio (<30 mg/g, ≥30 but <300 mg/g, or ≥300 mg/g) within the defined ranges was analyzed. The changes in eGFR were determined on the basis of the EMPA-KIDNEY study. An incremental cost-effectiveness ratio of <¥5,000,000 (approximately $35,500) per quality-adjusted life-year (QALY) was considered cost-effective. One-way deterministic analyses, probabilistic sensitivity analyses, and scenario analyses were conducted to ensure the robustness of the results.

Results

The addition of empagliflozin to the standard treatment was associated with lower costs and higher QALYs in the macroalbuminuria or microalbuminuria cohorts while the incremental cost-effectiveness ratios in the negative albuminuria cohorts were >¥5,000,000 per QALY, regardless of the initial eGFR. The probabilities of empagliflozin being cost-effective were >84% in the macroalbuminuria or microalbuminuria cohorts but <30% in the negative albuminuria cohorts. Scenario analyses where empagliflozin suppressed the eGFR decline in the negative albuminuria cohorts showed that the drug was cost-effective in CKD stage G3b and G4 cohorts. Empagliflozin was not cost-effective in patients with CKD stage G3a and microalbuminuria with the observation period of 10 years.

Conclusions

In patients meeting the enrollment criteria for the EMPA-KIDNEY trial, the addition of empagliflozin to the standard treatment of CKD was judged as cost-effective for patients with albuminuria but not for those without albuminuria in the Japanese health care system.
New Thoughts on Guiding Students’ Values in the Microblog Era
Authors: Xu Xueke
Published: October 2024

With the popularization of the Internet, which promotes the arrival of the microblogging era, college students in today’s colleges and universities are the main population in the microblogging era. Microblog attracts college students with its popularity, flexibility and originality. Due to the complexity of microblogging information, the lack of attention to microblogging education in colleges and universities, as well as some factors of college students themselves, microblogging will have a certain impact on the values of college students, which is specifically manifested in the sense that it makes college students increase their awareness of social participation, realizes and vulgarizes their value orientation, and makes their value standards relatively loose. Therefore, in the era of microblogging, it is necessary to take effective strategies to guide college students to establish correct values.
Women Political Leadership in India: Status and Challenges
Authors: Saha Jayeeta
Published: October 2024

The advancement of a nation depends on gender equality. Women's successful involvement in politics may lead to gender equality. Women's status in society is uplifted when they participate actively in politics. It is also essential to a country's growth since it is only possible for real development to occur when men and women participate equally in positions of leadership. The truth is that women still lag significantly behind men in terms of global political participation, even though they make up 50% of the global population. In India women’s participation as voters and campaigners has increased gradually but women are still under-represented in legislative bodies both at the national and state level and in political parties. Greater participation of women in decision-making positions in political parties and in government is a precondition for getting full support from women and for proper utilisation of women power. So we need to address the problem of low participation of women in leadership position in politics. In this regard, it is important to examine the actual status of women in political leadership position in India and challenges that women face in the political sphere.
An Evaluative Study of Impacts of Corporal Punishment on Students’ Personality at Primary Level in District Nowshera
Authors: Khan Faryal
Published: October 2024

Corporal punishment of children is a worldwide phenomenon children are physically punished in almost all society. Two key features define corporal punishment physical violence against children and the concept of punishment in response to wrong doing. Corporal punishment has great effect on the students in their academic life. It is conducted with in school. It has both positive and negative effects. When the students go against the rules and regulation and do not allow the discipline. Different types of punishment like kicking, slapping, punching or paddling etc. are given in the schools to change their negative behavior. It is observed that corporal punishment has negative effects on the student’s personality like they may falls in depression, fear and they start hatred from going to school. It will put bad effects on their personality, behavior and academic performance. Random sampling technique will be used. Data will be collected via questionnaire and then it will be analyzed by statistical package for social science (SPSS) software. Corporal punishment in schools reflects on large gap between current education policy that bans corporal punishment and actual implementations of the policy. The purpose of the present study is to investigate the impact of corporal punishment in schools at primary level in District Nowshera.
Exploring Disability within Igbo Cultural Identity: A Philosophical Inquiry
Authors: Onwuatuegwu Ignatius Nnaemeka
Published: October 2024

This article delves into the intricate relationship between disability and cultural identity within the Igbo society of Nigeria. Drawing upon philosophical inquiry, it examines the attitudinal barriers, cultural perceptions, and ethical dimensions surrounding disability. While negative beliefs rooted in cultural mythology perpetuate stigma and marginalization, the Igbo community also demonstrates instances of reverence and acceptance towards disabled individuals. Through an analysis of ethical theories and human rights frameworks, the article advocates for greater inclusivity and recognition of disability rights within Igbo culture. Despite historical challenges, signs of progress towards a more inclusive society are evident, fueled by educational advancements and awareness campaigns. By engaging in ongoing dialogue and critical reflection, the Igbo community can steer towards a future that embraces the diversity of its members and fosters a more just and compassionate society.
An Overview Regarding the U.S domestic Economic Strategies: Role of Think Tanks
Authors: Dehnavi Ellias Aghili , Niafar Mohammad Mahdi , Ahmadzada Kanan
Published: October 2024

Even though federal government of U.S play the primary role in managing the nations various systems such as fiscal policy, healthcare, defense and welfare, the existence of different political ideologies plays a part in national and international stability[1] , in sense that each ideology strategy in managing economic issues reach a different conclusion, proved by the numerous economical tragedies such as the greater recession , implements the bases of each ideologies perspective on government's role in reducing economic inequality, addressing job displacement due to technological change, and striking a balance between free market principles and government intervention during economic crises.1 To discuss the economical view of each side, one must fully understand in clarity the differences between two ideologies, in simplest form liberalism is described by the government's sole responsibly in preserving freedom protections its citizens individual liberty while also minimizing its intervention in its citizens lives, on the other hand, conservatism allows the government vast influence thus to conserve the established norms and institutions such as the cultural and religious traditions of its nation. While this is nearly the correct definition of what each ideology stands for, such political movements do tend to abuse power through the ideological privileges they stand for. Furthermore, the existence of the federal government is crucial in interfering with conservative or liberal administrations when their policies threaten economic stability. Federal governments’ regulatory agencies such as federal reserves and the Environmental protection agencies exist to act as checks on extreme economic policies. Under a conservative administration that Favors deregulation and reduced taxes, the federal government may intervene to prevent excessive corporate power or environmental harm that could arise from such policies.[2] Conversely, in a liberal administration pushing for expansive social programs or aggressive tax hikes, the federal government’s budgetary and constitutional frameworks can limit excessive spending or prevent overreach that may stifle economic growth.[3] Thus, regardless of the political ideology in power, the federal government ensures a balanced approach to economic management by safeguarding essential public interests while keeping national economic stability.
Have Your Cake and Eat It Too
Authors: Smith Cassia
Published: October 2024

As datasets have become a more significant aspect of Open Science, attention has turned to the data transformations that drive their creation. Li and Ludäscher have pointed out the importance of identifying data cleaning workflows as a series of modular transformations that can be extracted for reuse. This modular approach aids reproducibility and allows for transparency in data provenance. However, the constantly evolving nature of data science technology means that even once these modules have been identified and implemented, their functionality must be ported to new platforms as old ones become less applicable or less common in a field of study. When these transformations take place, it is important to consider not only practicality and functionality, but also transparency within a data processing team. Clarity of communication within a team is the first step towards providing clear and transparent documentation to the end user. This case study of an updated workflow process for a long-running longitudinal health and well-being study provides practical examples of these principles.
Crime Type and Occurrence Prediction Using Machine Learning Algorithm
Authors: P Sajitha
Published: October 2024

This project is entitled as “Crime Type and Occurrence Prediction Using Machine Learning Algorithm” Crime is still a major worry and a serious problem in our society. As a result, crime prevention is a significant issue that needs to be examined methodically. Detecting and preventing crime requires effective crime analytics, which is also crucial for assessing how well criminal investigations are working. To create precise forecasts, inferences are drawn from trained data. a system that uses user input to forecast different characteristics of crime. Users select the year, offense type, and city name. The method forecasts the population, expected number of occurrences, and expected crime rate for the year in 100,000 units based on this data. The dataset used in this investigation was produced on its own. The system makes use of machine learning techniques, particularly Random Forest, SVM, Logistic Regression, and Linear Regression. To guarantee precise forecasts and dependable results, it has undergone testing and training
Enhancing Kubernetes Observability: A Synthetic Testing Approach for Improved Impact Analysis
Authors: Amrutham Naresh Kumar
Published: October 2024

Kubernetes has become the cornerstone for deploying and managing containerized applications. Its dynamic and distributed nature, while offering scalability and resilience, introduces significant complexities in observability, monitoring, and impact analysis. Traditional monitoring solutions often fall short in providing visibility into the functionalities affected by interruptions in the Kubernetes platform, leading to prolonged downtime and impact analysis. This paper investigates the challenges associated with achieving effective observability for Kubernetes environments due to their distributed architecture. We highlight the limitations of relying solely on conventional metrics, logs, and events to understand the impact of system interruptions. To address these challenges, we propose an integrated approach that combines synthetic testing with existing observability tools. By executing synthetic transactions and simulating user interactions with the Kubernetes platform across various use cases, this method proactively evaluates the system's performance and detects issues that passive monitoring might overlook. This comprehensive view enables faster identification of impacted functionalities. Through practical experiments, we demonstrate how incorporating synthetic testing improves the detection of service degradations and supports more effective troubleshooting strategies.
Manajemen Operasional Kantor Jasa Penilai Publik (KJPP) Dalam Melakukan Prosedur Penilaian Properti Sederhana
Authors: Hidayat Haziz , Mahdi Fadilla Muhammad , Salama Sri Cahyaning Umi
Published: October 2024

This study aims to analyze how the operational management of Public Valuation Service Office (PVSO) Fuadah Rudi and Partners performs simple property valuation procedures. The type of research used is qualitative research with a case study approach. The results of this study indicate that PVSO Fuadah Rudi and Rakan have implemented operational management standards in simple property appraisal procedures. The operational management used is divided into 2, namely design and operation. The design is divided into 5 parts: a) Selection and design of products, processes, and equipment, b) Appointment of company locations and production units, c) Layout design, d) Design of tasks and work, e) preparation of production strategy and capacity selection. Operation is divided into 5 parts: a) Preparation of production plans. b) Planning, procurement, and control of inventory or materials, c) Machinery and equipment maintenance, d) Quality control, e) Human resource management. PVSO Fuadah Rudi and colleagues use mediation as a meeting point between the client and the office in case of a discrepancy.
Surfing the COVID-19 news waves: a Belgian case study of science communication and public relations with university press releases
Authors: Vissers Miguel , Paulussen Steve , de Bruijn Gert-Jan
Published: October 2024

Press releases remain an important link between academia and the media. While science communication is a goal of universities, public relations is also becoming increasingly salient. The press release, as a significant tool for both science communication and institutional public relations, means that the fields are entwined, prompting us to propose viewing science communication and public relations on a continuum. Based on a quantitative content analysis of all press releases sent out by a Belgian university during the COVID-19 pandemic we show what this university communicates about and identify how science communication can be used for public relation purposes and vice versa.
Transformative Insights Into Water Distribution Network Modeling and Optimization Through Epanet At Ranibandh and Khatra Blocks in Bankura
Authors: Nandi Buddhadev , Das Subhasish
Published: October 2024

Water, the most precious natural resource on earth, has become a valuable commodity compared to other consumer goods.lt acts as a universal solvent containing essential minerals.Over time, there has been a change from using water from natural sources such as springs and rivers to groundwater for daily needs. Pipelines networks are laid to lift treated water to overhead reservoirs and boosting stations. This study is about three combined pipeline networks including two boosting lines of the Ranibandh and Khatra blocks of Bankura District in West Bengal. Three water distribution networks operate 16 hours a day. To check the water distribution networks and whether they are optimized, we have drawn the network and determined the head, pressure, head gradient and velocity to avoid problems in these distribution networks.EPANET software is used to analyze such pressure, headloss, base demand and height at various intersections of the provided models.The goal is to keep these parameters within the desired range by optimizing pipe diameters.From there, the goal is to determine head loss, flow, velocity, etc. in various parts of such pipelines. Point of view is to observe what is happening and report the results using the EPANET software. Inputs are given based on the data obtained and the results are graphically interpreted accordingly.Results through simulations confirm that the network systems are nearly optimized by keeping these parameters within the desired ranges, if cost analysis is included and simulation results are compared with practical observations, this system can be optimized in a better way.
A proposal towards a VNS-based decision support tool for large scale location-covering-type problems
Authors: Plastria Frank
Published: October 2024

We describe a number of typical features, constraints and objectives,
frequently appearing in spatial system-design of maximum covering-type, such
as emergency response systems. We then indicate some heuristic local search
methods topped by a Variable Neighbourhood Search to construct and search
for good solutions. These ideas were intended to form the basis for a
possibly multi-objective spatial decision support system.
Exact solutions of some OR-library test instances for the p-next center problem
Authors: Ristic Dalibor , Todosijevic Raca , Urosevic Dragan
Published: October 2024

OR-Library is a platform that provides standardized examples for testing
problem-solving algorithms in many fields of the operational research and
combinatorial optimization. One of the problems emerged in the previous
decade is the p-next center problem. The solution to the p-next center
problem implies locating p centers in order to minimize the maximum user
distance to the closest center plus the distance between that center and the
center closest to it. There are several heuristic algorithms for solving
this NP-hard problem that give optimal or near-optimal solutions. We propose
an algorithm for solving the p-next center problem based on the variable
neighborhood search method, capable of recognizing whether some of the found
solutions from the OR-Library test set are exact. As a result of the
algorithm execution, more than 50% of the solutions are identified as
globally optimal. The paper presents a table with the found exact solution
values for the p-next center problem from the OR-Library test set.
Hidden lithic treasures. Research perspectives on museum collections of the Neolithic stone tools
Authors: Kufel-Diakowska Bernadeta , Chłoń Marcin , Bronowicki Wojciech , Borowski Michał
Published: October 2024

Museum collections contain numerous finds that are considered low-quality data and do not attract the proper attention of researchers. The most common reason is the uncertain context of the finds or lack of other precise identification. The main aim of this paper is to increase the scientific value of so-called stray finds. The collection of the Neolithic stone tools from two museums was subjected to multifaceted analysis combined with detailed archival research. The results allowed us to address two important aspects. At the level of objects, the use of microscopic observations proved the complexity and prolonged use-life of the Neolithic tools. At the cultural level, the re-evaluation of stray finds introduces changes in the range of Neolithic settlements in SW Poland.
Value, significance and use of 'exotic' materials – in the light of the presence of obsidian on Neolithic sites in Poland
Authors: Werra Dagmara H. , Szeliga Marcin , Pyżewicz Katarzyna , Burgert Pavel
Published: October 2024

At Neolithic archaeological sites in Poland, obsidian stands out as the most common ‘exotic’ raw material. Thereare over several hundred Neolithic sites where artefacts made from this raw material have been recovered. Given the absence of natural obsidian outcrops in Poland, it is evident that these artefacts were imported to the sites through various means, such as direct procurement or exchanges.One of the most extensive collections was found at Opatów, representing the Samborzec-Opatów group of the Late Neolithic. This collection forms the core of our discussion, in which we aim to explore the economic systems involved in the acquisition of obsidian. Results obtained from our analyses (technological, morphological, and traceological) constitute the foundation for considering various hypotheses regarding the significance and value of ‘exotic’ materials for Neolithic communities.
Addressing Marine Pollution in the Context of the UN Ocean Decade
Authors: Liu Jixin
Published: October 2024

The United Nations Decade of Ocean Science for Sustainable Development (2021-2030), known as the “Ocean Decade”, represents a significant global initiative aimed at mobilising ocean science to foster sustainable development. One of the key challenges highlighted by this initiative is marine pollution, which poses severe threats to ocean ecosystems, biodiversity, and human livelihoods. Marine pollution has escalated over the past decades, primarily driven by anthropogenic activities, including plastic waste, chemical runoff, oil spills, and untreated wastewater discharges. Addressing these challenges requires not only robust scientific research but also coordinated international efforts to implement practical and long-term solutions.
Liver Surgery Outcomes: Early Experience of a Highly Trained Group in a Low-Income Country
Authors: Abad Carlos Andrés Astudillo , P Martinez Calderon , A Vintimilla Moscoso , L Ayala , D Barzallo Sanchez
Published: October 2024

Background: The aim of this study is to analyze the morbidity and mortaslity rates among patients undergoing hepatic resections at a tertiary healthcare center in the city of Cuenca, Ecuador. A surgical team with formal training in hepatopancreatobiliary (HPB) surgery performs these surgeries. Study Design: A retrospective descriptive cross-sectional study was performed over time between 2017 and 2022 at the Hospital Jose Carrasco Arteaga, in which all patients who underwent liver resection during a 5-year period were included. The variables used were: I. Demographic data variables (age, sex, BMI, cirrhotic, ASA), II. pre-surgical diagnosis variables, III. Intraoperative and postoperative outcome variables (complications, blood loss, time in the operating room, etc.). Outcomes: A total of 38 liver resections were identified, of which 26.3% were male and 73.7% were female. Mean age: 60.5 years. Of the patients, 31.6% were reoperated, 23.7% were readmitted to the hospital, and 18.4% required a trans-operative blood transfusion. The surgical time averaged 290 minutes. The most common reason for surgery was hepatocarcinoma (23.68%), followed by intrahepatic cholangiocarcinoma (ICC) (13.15%). Morbidity was 23,68%, corresponding to Clavien Dindo 3B or higher. The 90-day mortality rate was 5.25%. Conclusions: According to the results obtained during the period from 2017 to 2022 at Hospital Jose Carrasco Arteaga, the implementation of hepatic resections has been demonstrated to be a safe and effective procedure, characterized by low rates of mortality and morbidity
Contextual Interference Effect in Learning of Simulated Laparoscopic Tasks
Authors: Langdon David Telles , T Rozovsky , S Johnston , G Tailor , S TellesLangdon
Published: October 2024

Laparoscopy, a minimally invasive surgical technique involving fine motor movements of the hands and fingers, has proven to be an invaluable tool in surgical care. Expediting the learning process of surgeons to reach proficiency in this surgical technique directly impacts patient outcomes, recovery times, and time management in hospitals [1]. Within motor learning, blocked and random practice has been identified as having correspondingly low or high levels of contextual interference, with different effects on learning and retention of motor skills. Contextual interference can be described as the level of mental interference created during the practice of motor skills. So far, research has been equivocal in identifying the best practice schedule for optimizing the acquisition and retention of fine and gross motor skills. This study examines the role of contextual interference in the acquisition, short-term retention (10-minute), and long-term retention (10-day) of three variations of a simulated laparoscopic task in 60 adults aged 18-65, 30 males and 30 females. The index of performance was represented by the total time taken to complete each task using curved laparoscopic graspers. Results showed that both blocked and random practice groups significantly improved acquisition performance over 54 acquisition trials. Participants undergoing a blocked practice schedule improved their pattern time-to-completion by 46%, retaining most of their performance in the 10-minute retest while maintaining their skill as well after 10 days. The random practice group improved acquisition performance by 38%, maintaining most of their performance in the short-term retention test, with only a slight decrease in speed in the long-term retention test. No statistically significant differences in the efficiency of blocked versus random practice schedules were found for both acquisition and retention, suggesting that both practice schedules can be viable options for learning and retention of simulated laparoscopic surgical tasks. We suggest tailoring training programs to individual skill levels to provide each learner with the optimal amount of contextual interference to reach their optimal challenge point according to subjective task difficulty experienced.
Modeled Sea Level Rise Impacts on Coastal Vegetation and Infrastructure at Lake Earl Wildlife Area and Tolowa Lagoon, Northern California: Implications for Management and Adaptive Planning
Authors: Sullivan Robert
Published: October 2024

Few ecosystems remain untouched by sea-level rise along the Pacific coast of North America. This process has facilitated reduction in the range of ecosystem responses and promoted loss of biological diversity at a scale relevant to local populations of plants and animals. Even fewer studies have evaluated the extent of rising sea levels on coastal ecosystems at finer scales. Here, I quantified the projected impacts of rising sea level on the vulnerability of plant communities at the Lake Earl-Tolowa Lagoon System (Lake Earl Wildlife Area) using a Static Vegetation Model. I also evaluated use of a recent regional coastal Marsh-migration Model fitted to the same study area. Results showed the Static Model predicted 100% of Estuarine Brackish Emergent habitat, 34.0% of Coastal Dune habitat, 80.7% of Freshwater Emergent Wetland, 48.9% of Forest Wetland, 21.0% of Grassland/Pasture, 8.0% of Coastal Maritime Forest, and 3.4% of Urban infrastructure would be inundated by salt-water at ~3.0m (~9.8 ft) of sea-level rise. Conversely, categories of marsh-types used in the Marsh-migration Model were inconsistent with the type of vegetation mapped within the study area, and impacts to these categories did not materialize until ~14 m (~45.9 ft) of sea-level rise. At this level Estuarian Wetland, Emergent Wetland, and Unconsolidated Shore exhibited slight increases in area, while other categories declined. The Marsh-migration Model also proved insufficient at identifying any major alteration in the extent of marsh-types for future planning or conservation by land managers, which was the primary goal of this model at conception. Identifying the potential impact of future sea-level rise on biological communities necessitates extensive data collection, quantification of plant and animal communities, updating existing vegetation maps, modeling the potential for migration inland, and establishing a comprehensive, multi-scale coastal-change modeling framework at spatiotemporal scales unique to the particular wildlife area. These actions are necessary to identify, assess, mitigate, and alleviate any potential future stressors in rising sea-level on natural resources on managed lands along the coast of northern California and elsewhere.
A Few Words about Progressive Care
Authors: S* Franjic
Published: October 2024

Progressive patient care means its maximum adaptation to the patient’s needs. Progressive care implies the classification of patients into groups, according to the degree of care required, the use of certain medical-technical and other equipment and the work of professional staff with appropriate training and work experience.
Emerging Frontiers in Surface Modification: A Critical Investigation of Advanced Anodization Technique for Biomedical Application
Authors: kumar Santhosh , R Kumar
Published: October 2024

Titanium anodizing or titanium oxide coating process has emerged globally nowadays owing to the properties of corrosion resistance, nontoxic & nonreactive nature, improve aesthetically, enhanced fatigue strength, increased osseointegration, exhibits natural biocompatibility, helps in part identification, reduced wear & tear, etc. Titanium anodizing is popular for various applications including aerospace, medical implants, automotive, sports equipment, dental, jewelry, etc. In the present investigation, 08 cylindrical samples of PureTitanium, Grade-4 material (7 for color anodizing and 1 for Type II gray color anodizing) were prepared. After that, samples were thoroughly processed & anodized by using distinct voltage as well as by using an optimum combination of parameters. The constant voltage was used during the anodizing process to achieve a consistent uniform layer thickness. Thereafter, coating thickness was measured on lowest and highest voltage samples, to know the variation of oxide layer formation. Chemical analysis was also performed to know the changes in elemental composition before and after anodizing, whether it comply the standard or not. Finally, all the samples were analyzed for fingerprint issues in case of biomedical applications.
Decoding Homoeopathy: Nanoparticle Evidence and its Therapeutic Implications
Authors: S Sheeba
Published: October 2024

Potentization subsists as a pharmacological procedure, interior to solid whacks which cast-off progressively insipid a drug. Potentization persist as a structure used by homoeopathy, which turned of practicing for 200 years, to sort its medications. The unique measureable is transformed to nanoparticles throughout the process, which might be transferal the "encrypted information" of innovative substantial and devour the organic consequence. Even at high dilutions greater than Avogadro's number, homoeopathic medications contain nanoparticles, according to recent research that used by advanced microscopy and spectroscopy. This research challenges accepted the wisdom of potency and the medicinal drugs. The National Nanotechnology Initiative claims the biological activity can be observed in nanoparticles as miniature of esoteric slew nanometres. The perception of homoeopathic remedies could be regarded as Nano medicines aligns with this endeavour. These nanoparticles have anti-inflammatory, immunomodulatory, and enhanced bioavailability characteristics. They possess the ability to influence immunological and cellular reactions. Throughout the potentization process the drug's bioactivity increases as identical result of reduction in particle size. This supports the theory, by using the principles of quantum mechanics, even highly diluted treatments demonstrate biological efficacy. Research has partaken the homoeopathic medications preserve the architectures of nanoparticles that impact the biological systems. This conclusion imparts the credence to possibility of these remedies may function as Nano carriers, conveying therapeutic information to specific localities privileged as frame. Through the application of these results, homoeopathy is positioned as a sort of Nano pharmacology, therefore bridging the gap between homoeopathic philosophy and contemporary nanoscience.
The Dynamics of Electron Acoustic Solitary Waves in a Nonmagnetized Quantum Plasma with Two Temperature Electrons
Authors: Roy Sagnik Sinha , T Debnath , N Mete , K Bulchandani , P Thakur , D Mahanta , S Ghosh , G Manna
Published: October 2024

In this article we have studied the linear and nonlinear properties of plasma waves using a one-dimensional quantum hydrodynamic (QHD) model specifically designed for quantum plasma with electron acoustic waves (EAWs). In particular, we use the standard reductive perturbation method to investigate the solitary structures resulting from nonlinearity. We use this method to derive and numerically analyze the Kortewegde Vries (KdV) equation relevant to the plasma system as well as the dispersion relation. Furthermore, in order to shed light on the dynamics of plasma waves under external influences, we investigate the temporal evolution of a forced KdV equation. PACS-52.20.j; 52.25.b; 52.30.d; 52.35.Mw; 52.65.Vv.
Non-Equilibrium Thermodynamics in the Non-Canonical Scalar Field Perturbed Space-Time: Stability Analysis
Authors: Maity Subhayan
Published: October 2024

The space-time of the Universe has been perturbed under a scalar field ϕ considering the minimum coupling between and the background metric. The solutions of Einstein field equations have been obtained under perturbed geometry and the corresponding conservation equation shows the non-equilibrium thermodynamic prescription of the cosmic fluid. Following the stability criteria of the cosmic fluid along with the laws of thermodynamics, some constraints have been imposed on the choice of ϕ.