bluuebunny/crossref_metadata_2025 huggingface dataset:
PowerFLOW Simulations of Helicopters in Blade-Vortex Interaction Conditions
Authors:   Dassault Systems, Romani Gianluca , Casalino Damiano
Published: July 2023

The scope of this paper is to assess the accuracy of the Lattice-Boltzmann/Very Large Eddy Simulation Method to predict the aerodynamics and aeroacoustics of helicopter rotors in strong Blade-Vortex Interaction conditions, and to validate a computational approach to include the effects associated to the rotor blade deflections into the numerical setup. The numerical flow solution is obtained by solving the explicit, transient and compressible Lattice-Boltzmann equation implemented in the high-fidelity CFD/CAA solver Simulia Power FLOW. The acoustic far-field is computed by using the Ffwocs-Williams & Hawkings integral solution applied to a permeable surface encompassing the whole helicopter geometry. The employed benchmark configuration is the 40% geometrically and aeroelastically scaled model of a BO-105 4-bladed main rotor tested in the open-jet anechoic test section of the German-Dutch wind tunnel in the framework of the HART-II project. In the present study, only the baseline operating condition of the HART-II test, without Higher-Harmonic Control enabled, is considered. Simulations are performed either assuming a fully-rigid blade motion or a computational strategy, based on a combination of a velocity wall boundary condition applied on the blade surface and fluid body-forces fields applied in proximity of the blade leading- and trailing-edge, to partially retrieve the effects related to the experimental blade flap and torsion deformations, respectively. The impact due to the inclusion of the blade elastic deformations into the computational setup on control settings, unsteady air-loads and noise footprint predictions is outlined.
Expanding Helicopter Noise Simulation Scope, based on High-Fidelity CFD
Authors:   University of Stuttgart, Keßler Manuel
Published: July 2023

Based on a previous high fidelity CFD simulation of descent flight for acoustic evaluation, the two other certification points of takeoff and flyover have been investigated. Selected simulation results are compared to flight test data and among each other, investigating commonalities as well as deviations. Special consideration was given to the separate analysis of blade harmonics and broadband noise, expecting the latter to be less accessible to CFD. However, the accuracy of results varies for both shares, ranging from excellent to leaving room for considerable improvement. An old empirical model for broadband noise did not deliver the upgrade hoped for. For takeoff, an alternative data set with a slightly different, but equally plausible trim condition was analyzed, resulting in a rough sensitivity estimate. Summing up, acoustic evaluation of high fidelity CFD can give valuable qualitative information, and in some, albeit not all, cases match flight tests and parameter dependencies also quantitatively.
High-Fidelity Multidisciplinary Design Optimization of Low-Noise Rotorcraft
Authors:   National Institute of Aerospace, Wang Li ,   NASA Langley Research Center, Lopes Leonard , Diskin Boris , Nielsen Eric , Lee-Rausch Elizabeth , Biedron Robert
Published: July 2023

A high-fidelity multidisciplinary analysis and optimization methodology is presented for low-noise rotorcraft design. Tightly coupled discipline models include physics-based computational fluid dynamics, rotorcraft comprehensive analysis, and acoustic-noise prediction and propagation. A discretely-consistent adjoint methodology accounts for sensitivities of the unsteady flow and unstructured, dynamically deforming, overset grids. The sensitivities of structural responses to blade aerodynamic loads are computed using a complex-variable approach. Sensitivities of the acoustic metrics are computed by manual differentiation. Interfaces are developed to enable interactions between the coupled discipline models for rotorcraft aeroelastic and aeroacoustic analysis and the integrated sensitivity analysis. The multidisciplinary sensitivity analysis is verified through a complex-variable perturbation approach. A gradient-based optimization for a HART-II rotorcraft configuration in a forward-flight condition is demonstrated with the objective of reducing a rotorcraft noise metric of interest, subject to aerodynamic and geometric constraints. The optimized configuration achieves a notable noise reduction and satisfies all required constraints. Computational cost of the optimization cycle is assessed in a high-performance computing environment and found to be acceptable for design of rotorcraft in general level-flight conditions.
Comparison of Rotor - Fuselage Flow Fields and Unsteady Tail Interactions between Two CFD Codes and Experiment
Authors:   Sikorsky a Lockheed Martin Co., Lorber Peter , Min Byung-Young , Zhao Jinggen
Published: July 2023

Experimental measurements of the unsteady flow fields generated by a scale model rotor, hub, and fuselage, plus the unsteady loads generated on a horizontal stabilizer, have been used as the basis for comparison to two computational fluid dynamics (CFD) simulations. The STAR-CCM+ commercial solver and CREATE™-AV HELIOS using the KCFD and SAMCART solver were applied to a series of seven test cases. The configurations were fuselage and hub with blades-on and blades-off for velocity fields, as well as the stabilizer in two locations for unsteady normal forces. The quantities examined included time averaged rotor, hub, fuselage, and tail forces and moments, time averaged, unsteady, and periodic velocities, and stabilizer forces. Overall for the forces and velocities, both codes did well for the time averages, and captured the trends and qualitative features of the unsteady quantities. Cases driven by a strong tip vortex - stabilizer interaction were modelled well, the key issue being rotor tip path plane trim. Cases driven by combined wakes from the hub, fuselage, and forward pointing blades were more challenging, and the codes often under-predicted the unsteady amplitudes or differed in the distribution of frequencies. Since this was accompanied by higher than measured Reynolds stresses, one cure may be resolved smaller scales in the solutions, increasing the order, or improving the turbulence modelling to better preserve the unsteady flow structures. However, application for industrial design still requires computational efficiency.
Extraction of Dynamic Inflow Models for Coaxial and Tandem Rotors from CFD Simulations
Authors:   Georgia Institute of Technology, Chen Po-Wei ,   NASA Ames Research Center, Schatzman Natasha ,   Iowa State University, Rajagopalan Ganesh , Sankar Lakshmi , Prasad JVR
Published: July 2023

The performance and inflow characteristics of representative coaxial rotor and tandem configurations have been studied. Two different solvers were used. The first approach is the well-established RotCFD solver that uses a wake capturing approach on a Cartesian coordinate system, with radially distributed rotating body forces representing the forces exerted by the rotor blades on the fluid. The second approach, called GT-Hybrid, uses Navier-Stokes analyses over small regions surrounding the rotor blades, and a free wake model outside the Navier-Stokes domains. There are significant differences in the way the flow was modeled with these two solvers. Nevertheless, the two solvers gave consistent, physically realistic results for representative coaxial and tandem rotor configurations. The inflow velocity field was examined, and the first three terms in the dynamic inflow (uniform component, and the lateral and longitudinal variations) were extracted. Comparisons with a viscous vortex particle method and the dynamic inflow theory was done for the coaxial rotor in forward flight and good agreement was observed. Significant interference of the upper rotor downwash over the lower rotor was captured and quantified for this coaxial rotor. For the tandem rotor configuration, the effects of overlap on the inflow was captured. In addition, the longitudinal variation of the inflow was properly captured with both solvers.
Inflow System Identification for Coaxial-Pusher Rotorcraft in Cruising Flight
Authors:   University of Maryland, Hersey Sean ,   US Army ADD, Juhasz Ondrej , Celi Roberto , Tischler Mark
Published: July 2023

Advanced multi-rotor configurations, such as coaxial rotorcraft, present a complicated aerodynamics problem, particularly in certain flight conditions where interactions between the wakes of two or more rotors exist. These aerodynamic couplings have large impacts on the flight dynamics of the helicopter, and consequently on flight control design. High fidelity aerodynamic models exist, such as vortex methods or computational fluid dynamics methods, that can accurately describe the behavior of rotors in complicated flow fields. However, these methods are not immediately applicable to flight dynamics and control analyses, because the equations of these models are not in state-space form, i.e., in ordinary differential equation form. In the last few years, frequency domain system identification has proven to be a valuable tool for identifying low-order state-space models of inflow dynamics, both for single main rotor configurations in hover and forward flight, and also for coaxial configurations in hover, from high-fidelity vortex methods. This paper demonstrates the method on a coaxial rotor configuration in forward flight at a pitch attitude, of a type likely to be encountered in flight, where the wakes interact strongly. This paper describes in detail the methodology, and the detailed steps required to identify the complex state-space system. A free vortex wake model is describe the aerodynamic flow field. The identification is performed for a flight condition that generates a complex aerodynamic flow field, for which closed form potential flow solutions are not available, and represents a clear example of how system identification techniques can be applied to any high fidelity aerodynamic tool to obtain models of inflow dynamics in state-space form for flight dynamics and control applications.
Computational Assessment of Laminar-Turbulent Transition for a Rotor in Forward-Flight Conditions
Authors:   University of Tennessee, Carnes Jared , Coder James
Published: July 2023

Forward-flight predictions of a rotor-fuselage system are made using a computational fluid dynamics approach. Solutions are generated using the NASA OVERFLOW solver with laminar-turbulent transition modeling enabled. Simulations are based on a hover tip Mach number of 0.57 at an advance ratio of 0.30 with prescribed collective and cyclic pitch angles. The configuration is based on a three-bladed Pressure Sensitive Paint rotor with a Rotor Body Interaction mod7 fuselage that was tested in the NASA Langley 14x22 subsonic tunnel. Grid generation and computational methods are described. The rotor and fuselage flowfield is analyzed and the effect of the transition model is assessed. Predicted forward flight performance is compared with measurements obtained at NASA Langley.
Uncertainty Quantification for Laminar-Turbulent Transition on Airfoil and Fuselage
Authors:   University of Maryland, Jung Yong , Baeder James
Published: July 2023

The effect of uncertainty in Reynolds-Averaged Navier-Stokes (RANS) simulation is determined through application of Uncertainty Quantification (UQ). In the present study, the sensitivity of aerodynamic coefficients to uncertainty in freestream turbulence intensity (FSTI) and surface roughness is computed for both a rotorcraft fuselage (ROBINMod7) and an airfoil (SC1095). Laminar-turbulent transition model has been extended to account for roughness induced transition by incorporating an existing roughness-induced transition model. Current UQ analysis is based on the Monte Carlo method with Gaussian distributions of uncertain input parameters. The use of a surrogate model allows for incorporating the results from intensive RANS simulations into a Monte Carlo method. The surrogate model is generated using either a cubic interpolation for a single uncertain parameter or a radial basis function (RBF) for multiple uncertain parameters. The stochastic standard deviation is measured as an indicator for magnitude of uncertainty. It is observed that the standard deviation of each aerodynamic coefficient depends on the flow conditions (angle of attack, mean FSTI, and mean roughness) and the type of transition (natural or separation-induced). Also, the major source of output uncertainty is identified between the unknown FSTI and roughness at various flow conditions.
Collaborative Airfoil Design for Dynamic Stall Performance
Authors:   Combustion Research and Flow Technology Inc., Ahuja Vineet ,   University of Wyoming, Nikoueeyan Pourya ,   US Army ADD, Potsdam Mark , Barr Stephen , Harms Tanner , Naughton Jonathan
Published: July 2023

In this paper we present the results of a collaborative computational and experimental design process where airfoil sections that show improved stall performance are identified. The baseline design is the SC1094R8 airfoil section that in itself has superior stall performance than the SC1095 airfoil section. A formal design optimization study was carried out to identify candidate designs that could further delay the onset of stall on thin airfoils such as SC1094r8 airfoil section without substantially affecting other aerodynamic performance factors. Formal computational studies showed that simply adjusting the thickness of the SC1094R8 airfoil provided minimum benefit in improving stall performance. Therefore, the design study incorporated a broader design space that included modifying thickness, leading edge shape, suction side airfoil profile and droop as variables in facilitating shape change. A candidate design from the study was tested in a wind tunnel and found to show better performance (higher lift) and milder stall characteristics although the onset of stall was within the margins of experimental uncertainty. Subsequently, the design space was re-investigated and the airfoil section was modified to provide higher margins in delaying dynamic stall. This iterative process between simulations and experiments in deriving feasible designs is presented in the paper. Important conclusions that impact the design of airfoil sections such as the correlation of nose shape with type of stall, margins in the design process to accommodate experimental uncertainties are also discussed as part of a data mining exercise.
Assessment of Current CFD Performance Predictions for Novel Rotor Blade Planforms
Authors:   University of Glasgow, Fitzgibbon Thomas , Woodgate Mark , Barakos George
Published: July 2023

This paper provides an assessment of modern CFD methods in predicting the rotor blade performance for advanced planform blade designs. The Langley BERP blade with an advanced tip shape is the primary supporting test case with results also presented for simpler blade designs such as the Langley Baseline and PSP rotor blade. The CFD method was able to achieve performance predictions of very good accuracy for all three blade designs in both hover and high-speed forward flight. However, further validation is required, for a blade with a more extensive experimental data set. The second part of the paper, focuses on analysis of the three rotor blade designs. In particular, typically used rotor efficiency metrics such as Figure of Merit and Lift to Drag ratio were only considered to be useful when comparing rotor designs at the same disk loading and operating conditions. The design analysis showed that subtle geometry features such as the blade thickness distribution across the blade tip and the exact blade planform shape can have a significant impact on the flow characteristics around advanced blade planforms showing the need for CFD coupled with optimisation methods.
Experiments on Flow Control of the Rotor via Synthetic Jets
Authors:   Nanjing University of Aeronautics and Astronautics, Chen Xi , ZHAO QIJUN , WANG BO , MA YIYANG
Published: July 2023

Principle experiment for the synthetic jet control effects on the aerodynamic characteristics of the rotor in forward flight were conducted with low rotor rotation speeds and free stream velocities. To ensure the structural strength of the rotor and the enough interior room for installing the actuators, a particular blade with a frame-covering structure was designed and processed. To measure the synthetic jet control effect on the rotor in dynamic stall, the aerodynamic forces and sectional velocity field were measured by using the six-component balance and the Particle Image Velocimetry (PIV) system in the wind tunnel respectively. The experimental results indicated that the synthetic jet has the capability to delay flow separation over the blade and to improve aerodynamic characteristics of the rotor. Furthermore, flow control effects of synthetic jets on rotor's aerodynamic characteristics were experimentally investigated with different jet parameters, such as jet locations, jet angles and excitation voltages, and some meaningful conclusions were obtained. In forward flight, the jet closer to the leading-edge of the blade is more effective in improving aerodynamic characteristics of the rotor. The jet with 90° inclined angle could bring out the most increment of the rotor normal force, while the jet with 30° inclined angle has the best control effects on preventing flow separation in the retreating side. In general, the synthetic jet with 30° inclined angle is more appropriate for preventing dynamic stall of the helicopter rotor.
Turboshaft Engine Altitude Testing for Army Qualification
Authors:   IronMountain Solutions, Bobula George ,   US Army-Aviation Turbine Engines, Wayne Richard , Watwood Charles
Published: July 2023

The altitude qualification test is one of the key test activities during the Army's Engineering & Manufacturing Development program that must be successfully completed by test in order to complete engine qualification. It is also one of the most expensive tests that must be performed during Qualification Testing, putting it under substantial schedule and cost pressure. This paper provides background to the tests the Army requires for the altitude qualification, presents the elements of the altitude test, discusses what is being learned during these elements of the test, and considers the test parameter control for the altitude test. The paper concludes with a discussion of lessons learned; a compilation of material collected over the past 50 years while engaged in various forms of altitude test, whether for research and development or for qualification. The full list of altitude test requirements with supplemental details found elsewhere in referenced documents are provided in an appendix, making this a thorough, standalone documentation of Army turboshaft engine altitude qualification requirements.
Material Property Characterization for Low Pressure Carburization Process Design using Computer Modeling
Authors:   DANTE Solutions Inc., Li Zhichao ,   US Army ADD, Fetty Jason , Sims Justin , Ferguson Lynn , Baker Treven
Published: July 2023

Low Pressure Carburization (LPC) is widely used in the aerospace industry for hardening components made of steels with high alloy content and high heat resistant properties. The traditional gas carburizing process often generates Intergranular Oxidation (IGO) near the surface due to the existence of oxygen in the furnace atmosphere, which needs to be removed by grinding after hardening to restore bending and contact fatigue performance. LPC processing is done in a low pressure chamber without the existence of oxygen, so the surface microstructure is improved by eliminating IGO. High temperature resistant steels require high alloy element contents, and some elements are strong carbide formers, such as Cr, Mn, Mo, and V, etc. During LPC processing, both iron and alloy carbides can be formed, which significantly affect the carburization time required to reach a specified case depth and surface carbon. The carbides formed during the LPC process may not decompose completely prior to quench hardening, and these primary carbides will end up in the final processed parts. If the size of these primary carbides is not controlled, both bending and contact fatigue performance may be decreased. In order to control carbide formation during LPC, the carbon diffusivity of a material must be characterized. This characterization was recently performed under a program between DANTE Solutions and the Combat Capabilities Development Command Aviation and Missile Center (CCDC AvMC). In this research, a specifically designed coupon was used to characterize the carbon diffusivity and carbide forming properties during LPC processes. Using the characterized material properties, LPC process recipes can be designed by using modeling to achieve specific case depth and surface carbon content. The work was demonstrated using Pyrowear 675 steel and DANTE commercial heat treatment modeling software.
Advanced High Temperature Propulsion Materials Research Project: An Update
Authors:   US Army Research Laboratory, Ghoshal Anindya ,   US Naval Post Graduate School, Nieto Andy ,   Technology Assessment and Transfer Inc., Fehrenbacher Larry ,   Acree Technologies Inc., Wong Kelvin ,   Physical Optics Corporation, Grubsky Victor ,   Luna Innovations Inc., Webster Matthew ,   University of Maryland, Jain Nishan ,   University of California San Diego, Wright Andrew , Murugan Muthuvel , Walock Michael , Bravo Luis , Swab Jeffrey , Hofmeister-Mock Clara , Hirsch Samuel , Dowding Robert , Pepi Marci , Flatau Alison , Luo Jian
Published: July 2023

The goal of this collaborative program within United States Army Research Laboratory (ARL) is to establish a generalized fundamental physics-based approach and probabilistic-based lifing method to extrapolate thermal loading performance and material characterization results from high performance high temperature ceramic materials such as ceramic matrix composites (CMC) based flat specimens and engine component representative specimens. High temperature structural integrity and durability and probabilistic-based lifing assessment is evaluated both analytically and experimentally under thermal shock, thermal cycling, and combined thermo-mechanical loadings. This work aligns with Army's Modernization Priorities Future Vertical Lift and Long Range Precision Fires. This research paper provides the current research of ARL's Advanced High Temperature Propulsion Materials project.
Human Respiratory Syncytial Virus and Coronavirus Rates in Iranian Elderly Patients More than 60 Years Old with Acute Respiratory Symptoms
Authors: Tavakolian Shaian , Goudarzi Hossein , Alavi Darazam Ilad , Faghihloo Ebrahim
Published: July 2023

Background:

Scientists have believed that a number of risk factors, especially viral infectious agents, can be related to respiratory diseases. Due to the pandemics in 2019, Human Respiratory Syncytial Virus and Coronavirus have attracted the attention of different kinds of research. In this study, we attempted to evaluate the prevalence of these viruses.

Materials and Methods:

After extracting the RNA and DNA of these viruses, molecular tests were employed to report the rate of them in patients suffering from respiratory symptoms.

Results:

Our results demonstrated that 31 samples were COVID-19 positive. Furthermore, two cases had Respiratory syncytial virus (RSV) subgroup A infections. However, no cases showed a coinfection of both viruses.

Conclusions:

It seems that during the pandemic of COVID-19, RSV should not be ignored as it can be responsible for the respiratory syndrome.
New Superheroes/Villain Characters for Teaching Engineering Materials Selection
Authors: Goh Suk Meng
Published: July 2023

Superhero themes have been increasingly used in the teaching of a range of topics including business, humanities and science in recent years. Typically, characters from existing popular media are adopted for the teaching activities. On the other hand, customised characters that are developed from scratch allow the educator to have more control of the characters’ features so that the learning objectives can be achieved more effectively. In this work, new fictitious characters have been created as cases for students to perform their engineering materials selection assignment. The motivation for using the superhero theme was to increase the students’ excitement in the assignment. This paper shares the approach taken and the teaching experience after running the superhero theme with two cohorts of students.
Gamifying Exercise in the Elderly
Authors: Heston Thomas F
Published: July 2023

Gamification of exercise in the elderly is a promising approach to promoting physical activity and improving overall health outcomes. By integrating game elements into exercise routines, seniors experience increased motivation, adherence and enjoyment, which leads to improved physical and cognitive health. Strategies for implementing gamification into exercise programs involve game design, personalization and feedback mechanisms.
EFEKTIVITAS PENINGKATAN AKTIFITAS FUNGSIONAL DENGAN INTERVENSI ICE MASSAGE DAN TERAPI LATIHAN PADA KASUS PLANTAR FASCIITIS
Authors: Muawanah Siti , Herli Muhammad Azhari
Published: July 2023

Plantar fasciitis occurs due to excessive stretching of the plantar fascia which can lead to inflammation of the plantar fascia dimedial calcaneus. The purpose of this study was to analyze the effectiveness of increasing functional activity with ice massage interventions and exercise therapy in cases of plantar fasciitis. This research method is pure experimental with randomized pre-test and post-test group design. In this study 9 respondents as group I were given ice massage intervention and 9 respondents as group II were given exercise therapy intervention. Physical examination of physiotherapy and measurement of increased functional activity were performed using the foot and ankle disability index (FADI). The test results showed an increase in functional activity with exercise therapy intervention before and after treatment in groups using non-parametric tests with the Wilcoxon Signed Ranks Test because the normality value was before P> 0.05 and the value after intervention was P <0.05 data with p = 0.008 (p <0.05), it means that there is a difference before and after treatment in this group. The conclusion in this study is that the effectiveness of increasing functional activity with exercise therapy interventions is better than giving ice massage in cases of plantar fasciitis which can be seen from the mean difference between the ice massage group 15.11 + 4.81 and the exercise therapy group 29.11 + 10.07.
Marketing Communication Strategy to Strengthen Brand Awareness: Case of K Commerce in Indonesia
Authors:   School of Business and Management, Institut Teknologi Bandung, Indonesia, Azwar Jehan Khairina , Anggoro Yudo ,   School of Business and Management, Institut Teknologi Bandung, Indonesia, Mussry Jacob Silas ,   School of Business and Management, Institut Teknologi Bandung, Indonesia
Published: July 2023

This research outlines a strategy for increasing K Commerce’s awareness of the brand in Indonesia’s competitive eCommerce landscape, specifically in the Jabodetabek region. An integrated marketing communication approach combining segmentation, targeting, positioning, values laddering, and the PDB triangle is offered using Kotler’s STP model and differentiation concept. The findings of the study highlight a positioning and differentiation approach based on customer centricity, trust, innovation, and enjoyment. The importance of optimal content, context, and infrastructure is emphasized. Proposed taglines capture K Commerce’s brand spirit, and the marketing communication strategy devised plans to overcome the awareness-appeal gap, placing K Commerce as a top brand choice among Millennials and Generation Z. This research will be used to improve K Commerce’s awareness and position in eCommerce.
ESG Integration into Company Valuation: Case Study of PT Surya Energi Indotama
Authors:   School of Business Management Institute Technology Bandung, Bandung, Indonesia, Daffa Haidar Ahmad , Nainggolan Yunieta Anny ,   School of Business Management Institute Technology Bandung, Bandung, Indonesia
Published: July 2023

The commitment of Indonesia to the Paris Agreement has prompted the government to issue regulations supporting the development of renewable energy in the country. Utilizing Environmental, Social, and Governance (ESG) criteria allows investors to align their values with their investments and effectively evaluate a company’s risk management capabilities. Companies that prioritize ESG principles, particularly those involved in renewable energy production, can seize opportunities arising from this situation. PT Surya Energi Indotama (SEI), a company that has not engaged in equity funding before, aims to capitalize on these opportunities. To assess the value of PT SEI, both absolute valuation and relative valuation methods are employed. Recognizing the potential of ESG factors to enhance company value, the author implements the Value Driven Adjustment approach and incorporates the SASB industry ESG standard. The valuation analysis reveals a potential valuation increase of up to 30%.
Relationship between Nurse Performance and Implementation of Infection Prevention and Control at Hospital X Bogor, Indonesia
Authors:   Faculty of health sciences, Universitas Pembangunan Nasional “Veteran” Jakarta, Indonesia, Zhafarina Zhafirah , Hutahaean Serri ,   Faculty of health sciences, Universitas Pembangunan Nasional “Veteran” Jakarta, Indonesia
Published: July 2023

The hospital is a place for people to get treatment and health services, and expect the best treatment. However, due to the high rate of Healthcare-Associated Infections (HAIs) in hospitals, health workers must be able to take Infection Prevention and Control (PPI) measures; but the workload, work environment, motivation, and attitudes drive the performance of nurses in providing nursing care, which can have an impact on the implementation of PPI. The purpose of this study was to determine the relationship between nurse performance and respondent characteristics with the implementation of infection prevention and control in the inpatient room of Hospital X in Bogor Regency, Indonesia. The method in this study is descriptive-analytic with a cross-sectional approach with a total sampling of 45 respondents. The results of the chi-square test obtained a p-value of 0.001 < 0.05, which means that there is a significant relationship between the performance of nurses and the implementation of infection prevention and control. It can be concluded that the better the nurse's performance, the greater the opportunity to be able to carry out infection prevention and control actions properly. Researchers recommend improving the quality of nurses by providing retraining or retraining to nurses to add experience and insight so that it will increase the work ethic that is beneficial for the implementation of infection prevention and control properly organized by hospital management.
Care Nursing to Patients about Fulfillment Need Oxygenation of the Patient Bronchopnuemonia in the Pediatric Room
Authors:   Parepare School of Nursing, Makassar Health polytechnic, Jalan Laupe, Parepare City, South Sulawesi Indonesia, Asikin Muhammad
Published: July 2023

Bronchopneumonia is term medical used for state inflammation of the walls bronchioles and tissues surrounding lung. Brocopeumonia can called as lobular pneumonia Because inflammation of the parenchyma of lungs characteristic localized to the bronchioles along with the alveoli around it.
Kruha i igara - razvoj, simbolika i prikazi gladijatorskih igara
Authors: Domazet Božo
Published: July 2023

Gladijatorske igre i sami gladijatori važna su povijesna i društvena tema, s velikom znatiželjnom publikom i mnoštvom povijesno umjetničkih radova. Stoga, tekst u nastavku donosi glavne ideje podrijetla, početka i razvoja gladijatorskih borbi. Objašnjava vrste gladijatora, kao i gladijatorica, ali i same scenarije borbe. Rad donosi mnoštvo povijesno umjetničkih prikaza i iskaza koje prenose mnoštvo priča. Radi se o pregledu od samog početka i razvoja gladijatorskih igra, njihova prestanka, sve do novovjekovne umjetnosti i fascinacije istih događaja.
Specific Legal Provisions Established During the State of Pandemic
Authors:   Petroleum-Gas University of Ploiesti, Rădulescu Dragoş Lucian
Published: July 2023

The legal provisions applicable to institutions or public authorities may be determined by the occurrence of exceptional circumstances, which require an adaptation of the legislator's requirement for a determined period, in order to limit its effects. The article analyzes the legality of the decisions of the control bodies, regarding the finding of a violation by a public authority in the ongoing activity of the provisions of Law no. 672/2002 and the provisions of GEO no. 131/07.08.2020, with reference to the establishment of the state of alert during the Covid-19 Pandemic.
Protection of Children's Cognitive Integrity - a Legal and Educational Context. TikTok case
Authors:   Petroleum-Gas University of Ploiesti, Volosevici Dana , Grigorescu Dragoș ,   Petroleum-Gas University of Ploiesti
Published: July 2023

In the paper we propose to analyze both from the point of view of the legal provisions in force, but also from the educational point of view, the cognitive situation of children in the face of exposure to applications such as those with a wide audience dedicated to socialization. Among the social interaction tools widely used by young people and children, we have chosen the TikTok application, as an illustration of the ways of legal and educational regulation with the aim of protecting the cognitive integrity of children. In the absence of effective legal actions and educational interventions by the decision-makers regarding children's development, in our opinion, the cognitive autonomy of children is seriously affected. At the same time, we present sufficient legal and educational ways to preserve the academic well-being of children.
The Dilemma of Teaching in the Digital Era: Artificial Intelligence. Risks And Challenges for Education
Authors:   Petroleum-Gas University of Ploiesti, Ghiță Iulia Adelina , Stan Angela ,   Petroleum-Gas University of Ploiesti
Published: July 2023

In the digital era, a new dilemma is beginning to take shape in the mind of every teacher: Is teaching still necessary? The question has been a concern since 1990, when Tim Berners-Lee, a researcher at the Centre Européen de Rechérches Nucleaires in Geneva, laid the foundations for the World Wide Web (www). Shortly after the emergence of the World Wide Web, desired information could be accessed with a click, which contributed to a rapid decline in the frequency of visits to libraries, second-hand bookshops, or reading clubs. The issue of AI is viewed here from the perspective of the dangers observed, including addiction, the impact on personal data security, the increase in the digital divide, and the loss of various abilities or competencies. It can be seen that "This generation will no longer have their heads filled, they will navigate the net, cheerful and inventive, sheltered from wars and poverty" (Blais, Gauchet, and Ottavi, 2019). From a pedagogical perspective, our concern is to outline possible directions of action that can help us effectively cope with the challenges posed by the use of AI in teaching-learning activities.
Family Involvement in Extracurricular Activities Aimed to Support Children Educationally and Emotionally
Authors:   Petroleum-Gas University of Ploiesti, Iurea Corina
Published: July 2023

The study contains indispensable information for a future teacher. The implementation of non-formal activities contributes greatly to improving the quality of the instructional-educational process, having an active-participatory character and a credible formative value on the personality of preschoolers and schoolchildren. The benefits of these types of extracurricular activities increase when the family is a partner in the educational and emotional support of the children, thus becoming an important support for the school.
Epidemiological profile of Covid-19 cases and deaths in a reference hospital in the state of Goiás, Brazil
Authors: Da Silva Oliveira Gabriela Larissa , Neves Jesus Rafael , Ferreira Dias Pollyana , Magalhães de Brito Alvares Laize Evelyn , Nepomuceno Ana Carolina , Dourado Nóbrega Sakai Lívia , Daher Marcelo Cecilio , Nascimento Silva Osmar , Hungria Pinto Emerith Mayra
Published: July 2023

The pandemic caused by the Coronavirus 19 (Coronavirus disease 2019, COVID-19) killed countless people in 2020 and it arrived in Brazil in mid-February from the same year. It spread quickly, through its facilitated form of transmission by droplets of saliva, coughing, sneezing and contaminated surfaces. Several studies have indicated that male people over 60 years of age with comorbidities such as diabetes mellitus, chronic kidney disease, cardiovascular disease and/ or chronic lung diseases had higher rates of progression to Severe Acute Respiratory Syndrome and greater vulnerability to death. In this sense, this study aimed to describe the clinical and epidemiological profile from suspected and confirmed cases of COVID-19 in a hospital in the city of Anápolis, in the State of Goiás, Brazil, from March to December 2020. A total of 1,170 patients were included in this study, with 54.8% of the patients admitted with symptoms of COVID-19 were women (46.9%) aged between 30 and 59 years old. In addition, it was noted that 11.5% of these patients had some type of comorbidities. Furthermore, the data revealed that 82.2% of the laboratory-confirmed patients who died had comorbidities, most of them men (57%), and from the total of 68.5% had two or more comorbidities, with cardiovascular origin being the most frequent reaching 77.5% from the sample. Thus, it was concluded that the clinical-epidemiological profile of suspected and confirmed patients for COVID-19 in this research was characterized by the majority of female patients between 30 and 49 years of age, although most confirmed cases and deaths occurred in men older than 60 years of age. Most confirmed patients had two or more comorbidities, most of them of cardiovascular origin, followed by metabolic syndromes, lung diseases and others.
KEY WORDS: COVID-19; epidemiology; comorbidity.
Educational Goals and Types of Computational Thinking in the Competition Papers for II – IV Grades of the Chernorizets Hrabar Tournament
Authors:   Institute of Mathematics and Informatics, Lazarov Borislav
Published: July 2023

В статията се прави операционализация на таксономията на алгоритмичното мислене, предложена от Вайнтроп и колеги, чрез тестови единици от турнира „Черноризец Храбър“ от състезателни теми за II – IV клас. Направен е дидактически анализ върху извадка от образователни цели, които изискват определени дейности, класифицирани като типове алгоритмично мислене в таксономията. На основата на статистическа обработка на постиженията на учениците се правят изводи за възможностите да се формират и развиват определени типове алгоритмично мислене в началната степен на основното образование. Показано е с примери как конкретни образователни цели се свързват със съответно алгоритмично мислене в различен контекст. Обосновава се ползата от ранно изграждане на алгоритмично мислене у учениците за потенциалното им реализиране в STEM професионални направления.
The Defensive Capabilities of Mechanized and Tank Formations – Challenges and Significance
Authors:   Rakovski National Defence College, Zhelyazkova-Genkova Slavena , Gradev Kalin
Published: July 2023

Defense policy objectives are achieved by building and continuously developing appropriate defense capabilities to counter contemporary challenges, risks and threats and achieving defense capabilities to effectively participate in the full range of NATO and EU-led operations. To ensure that the development of defense capabilities is directed to the operational needs identified by the armed forces and is consistent with the missions of the Armed Forces, it is necessary to determine the importance of each of the imperatives/capability elements, as well as the extent to which the proposed directions for their improvement. For the purposes of research on the topic: „Directions for improving the capabilities of mechanized and tank formations in planning and conducting tactical actions in a defensive operation” the method of expert evaluation was applied and the results of the study are presented.
The War in Ukraine in the Perspective of the Election Campaign for the 49th Ordinary National Assembly
Authors:   University of National and World Economy, Raycheva-Danailova Boryana
Published: July 2023

The crisis in political speech in our country (2022 – 2023) was strongly influenced by the military conflict in Ukraine that officially began on February 26, 2022. The war, which has shaken politics at the international level, has exposed the thick red lines between political entities in Bulgaria, deepening the parliamentary crisis that has reached a state of collapse in the past year and a half. And the media – intentionally or not, became a witness and accomplice to what was happening. The relevance of the chosen topic is dictated by the need to analyze the political speech regarding the military conflict in Ukraine during the election campaign for the fifth consecutive early parliamentary elections in Bulgaria (April 2, 2023). In the analysis, the author refers to the messages from the political formations and the position they take on the war, as well as their media coverage. The positions of media experts are presented. Sociological surveys were also examined, which show the attitude of the voters on the question. The goals of the development are to make an attempt to analyze the behavior of the main political subjects in our country regarding the war in Ukraine, the position they take, as well as the messages they send to the voters; to examine the results of each party’s strategy and how far it was able to influence the election result; to offer a prediction about the future development of the parties (possible and impossible partners) in the perspective of their political speech related to the military conflict. The pre-election campaign for the 49th Ordinary National Assembly was marked by the theme of the war in Ukraine and made it necessary for political subjects to clearly define their position on the conflict both to the voters and to their competitors, but also to future potential partners in the attempt to form a cabinet. In the current uncertain domestic political and international situation, the Bulgarian voter demonstrates the need for clearly stated and categorical positions in which to recognize his convictions.
Decentralised Social Media
Authors:   University of National and World Economy, Kalenderov Vasil
Published: July 2023

The model by which the most prominent social media operate has its non-sufficiencies, and they have been clearly visible in recent years. Technological innovations provide an opportunity for new decentralised models of social media to avoid the problems associated with centralised data storage and moderation.
The Influence of Product Quality, Personal Sales, and Pricing on Purchase Decisions at PT Panca Niaga Jaya Lestari Kisaran
Authors: Panjaitan Yuni Lastri , Hutagalung Rani Beby Yohana , Master Viona Adelina Lion , Sitorus Jhekson , Ginting Nurmaidah
Published: July 2023

Personal selling is a skill somebody for communicate to candidate buyer in offer something products for buyers interested for To do purchase product that. Determination price policy a business entity in set price sell from products offered PT Panca Niaga Jaya Lestari Kisaran  is a private company engaged in as a food distributor light that has been operate since 2002 in the Kisaran. The research method uses a quantitative approach, the type of research used is descriptive quantitative. Data was collected by means of interviews, questionnaires and documentation studies. Analysis of the data used is multiple linear regression. Population is PT Panca consumers Niaga Jaya Lestari, totaling 88 people. Determination of the sample in the study using a saturated sample. The results showed that the quality of product, personal selling and pricing simultaneously and partially have a positive and significant effect on purchasing decisions with a coefficient of determination of 0.565 or 56.5%, while the remaining 43.5 % is influenced by other factors. The conclusion of the study is simultaneously and partially product quality, personal selling and pricing have a significant effect on purchasing decisions on products PT. Panca Niaga Jaya Lestari Kisaran
Juridical Analysis of Money Laundering Crimes in Financial Technology Based Equity Crowdfunding Services in Indonesia
Authors: Halawa Adil Putra
Published: July 2023

The importance of the convenience of practical and efficient financial transactions in today's business world, has led to new innovations in the financial sector called financial technology or (fintech). The type of research carried out is normative juridical research by proposing legislation in conducting the study, selecting the type of normative juridical research, then this research is also supported by empirical data in which the researcher conducts interviews with the Head of OJK Regional 5 North Sumatra Office, and the Prosecutor. The scope and rules regarding fintech services based on equity crowdfunding in Indonesia are first registration, Second Regulatory Sandbox, Third Operator Licensing and Approval, Fourth Monitoring and Supervision. Legal certainty in regulating money laundering crimes in fintech services based on equity crowdfunding in Indonesia is related to the existence of POJK Number 37/POJK.04/2018 concerning Crowdfunding Services through Information Technology-Based Stock Offerings that have an effect on filling legal gaps in the process of establishing an equity company. crowdfunding and the practice of equity crowdfunding in Indonesia so that legal certainty refers to the implementation of the POJK No. 37/POJK.04/2018 law is clear, plus the existence of Law No. 8 of 2010 strengthens the duties, functions, and PPATK in prevention and eradication Money Laundering crime. The obstacles in preventing the eradication of money laundering crimes in fintech-based equity crowdfunding services in Indonesia are the first obstacles in terms of legal structure, second obstacles in terms of legal substance, and third obstacles in terms of legal culture.