bluuebunny/crossref_metadata_2025 huggingface dataset:
Saúde mental da mulher: desafios no diagnóstico e intervenção precoce: uma revisão sistemática
Authors: Reis Isabella de Lara Aires , Meira Marissa Maria Leiriao , Saldanha Junior Jose Carlos , Frizon Renata Reis , Lima Isla Barbosa Leite , Dressel Paula , De Lima Flávia Marques Melandi , Buda Luis Felipe Schiavon
Published: July 2023

A saúde mental se apresenta nos últimos tempos como uma temática de preocupação global, principalmente devido exigências da vida contemporânea. Considerando que a mulher desempenha inúmeras atividades, é responsável por muitas demandas e ainda carrega consigo historicamente a atribuição referente à fragilidade, a imposição de seguir as normas impostas pela sociedade, é vítima de machismo dentre outras questões, a temática faz-se relevante para buscar elencar as nuances que cercam a vida feminina e como isso pode interferir em problemas mentais. O estudo aqui exposto tem por objetivo refletir sobre os principais desafios para o diagnóstico e a intervenção precoce na saúde mental da mulher. Dentre os achados, pode-se constatar que muitas são as causas que originam as doenças mentais femininas e que essas precisam ser tratadas levando em conta o gênero feminino e suas atribuições.
EFFICIENCY OF MICROORGANISM-ENRICHED FERTILIZERS WHEN GROWING POTATOES
Authors: Volkohon V. V. , Dimova S. B. , Sasina T. S. , Volkohon K. I , Shevchenko L. A. , Shtanko N. P. , Zemska I. A.
Published: July 2023

Objective. Investigate the possibility of enriching mineral fertilizers (Azofoska: NPK 16:16:16) with agronomically useful microorganisms by applying their suspensions to solid fertilizer granules. Methods. Microbiological (cultivation of microorganisms on different media, obtaining suspensions, determination of titre in suspensions, microscopy), field small-plot experiment in six repetitions (growing potatoes on sod-podzolic soil), full accounting of the harvest from each plot, statistical. Results. Enrichment of Azofoska with microorganisms by applying aqueous suspensions of Trichoderma harzianum PD3 and representatives of the genus Bacillus to fertilizer granules before their application to sod-podzolic soil at the rate of N80P80K80 had different effects on the yield of Bellaroza potatoes. T. harzianum PD3- and Bacillus sp. 102-enriched fertilizers contributed to a reliable increase in crop yield in a three-year experiment. The combination of these microorganisms to enrich Azofoska did not provide a stable effect over the years of research. The use of B. vallismortis 44- and B. cereus SB1-enriched fertilizers was not effective. The greatest increase in potato yield was ensured by the use of Bacillus sp. 102-enriched fertilizers. At the same time, minor deviations from the average parameter were reported for all six repetitions in the experiments (in contrast to other variants). Conclusion. The fundamental possibility of increasing the efficiency of mineral fertilizers by enriching them with agronomically useful microorganisms when growing potatoes on sod-podzolic soil has been shown. The efficiency of biologically modified Azofoska depended on the microorganism used for enrichment. Additional research both on the screening of microorganism strains promising for this purpose, as well as technological aspects (the number of cells of microorganisms on fertilizer granules, the use of adhesives, carbon sources and adjuvants during fertilizer enrichment, the terms of preservation of microorganisms on granules depending on the conditions of enrichment, extension of the spectrum of fertilizer types and types of agricultural crops, etc.) is necessary.
A CROSS SECTIONAL STUDY TO DETERMINE THE ASSOCIATION OF MATERNAL NUTRITIONAL STATUS RISK CLASSIFICATION WITH BIRTH WEIGHT
Authors: Kariyappa Mallesh , Karanam Sreesarada , Reddy P S Chikkanarasa
Published: July 2023

Introduction: Birth weight is a predominant factor responsible for child survival. Low birth weight is an independent risk factor for development of Malnutrition in the children. Maternal anthropometry and her nutritional intake diversity before and during pregnancy are critical factors inuencing birth weight. Maternal nutritional status is related to Age, Height ,BMI ,Presence of Anaemia ,MUAC, other medical illnesses and mental health. After the institutional ethics committee clearance, Method: Data of post natal mothers regarding age, history of associated chronic illness Pre pregnancy weight , height, BMI , MUAC, Hemoglobin ,Mental health assessment which includes PHQ 2 score and risk classication is done as not at nutritional risk ,at some nutritional risk at severe nutritional risk which was based on MAMI classication of Mothers at nutritional risk with Birth weight is collected during the study period from APRIL 2023 to MAY 2023 and interpreted by statistical analysis. Out of Results: 75 Mothers included in the study, mean age at pregnancy was 23years, Mean height 143cms with standard deviation of 5.1,Mean weight of 44kg with standard deviation of 5.25. Mean BMI of 23.48 with standard deviation of 3.83,Mean MUAC 23.85 with standard deviation of 2.23. Mean HB of 10.0 gm/dl with standard deviation of 1.15. mean birth weight 2.52kg with standard deviation of 0.36. 28% of the subjects were at risk of depression disorder based on PHQ 2 Scores. Low birth weight was 54.7%,Normal Birth weight were 45.3% Mothers at Severe nutritional risk, at some nutritional risk and no nutritional risk were 2.7% ,94.7% and 2.7% respectively and low birth was observed as 100%,47%% and 50% among them respectively. From our study we conclude that there is signicant association betwe Conclusion: en maternal nutritional status with birth weight of the baby
SEROPREVALENCE OF HUMAN IMMUNODEFICIENCY VIRUS, HEPATITIS B AND HEPATITIS C AMONG HEALTHY BLOOD DONORS AT A TERTIARY CARE HOSPITAL IN EASTERN UTTAR PRADESH INDIA: A RETROSPECTIVE STUDY
Authors: Singh Sabal Pallavi , Mitra Shaila , Kumar Rai Rajesh , Tripathi Archana , Jain Mayank , Singh Vibha
Published: July 2023

Blood transfusions are inseparable entity of various treatment modalities in healthcare system. The chances of transfusion transmitted infections (TTIs), in blood transfusion services are a major problem faced in blood banks and hospitals in the world and our country. Being one of the largest tertiary care hospital handling a huge urban as well as rural population of eastern Uttar Pradesh the voluntary donation is one of the major source for blood and blood components. The aim of this study was to determine the trend of seroprevalence of Transfusion transmitted infections such as human immunodeciency virus (HIV), hepatitis B virus (HBV) and hepatitis C virus (HCV) in a pool of voluntary healthy blood donors. This study was conducted at the blood bank of a Baba Raghav Das Medical College, Gorakhpur serving the urban and rural population in Eastern Uttar Pradesh. Aretrospective study on blood donors over a period of 2-year (January 2021-December 2022) was conducted to assess the seroprevalence and the trend of Human Immunodeciency Virus, hepatitis B and hepatitis C infection in voluntary blood donors in our institution.
BRONCHIECTASIS IN ADULT PATIENTS: CLINICAL PECULIARITIES AND APPROACHES TO THE TREATMENT
Authors: Rudnyk Viktoriia , Chaplynska Nataliia , Skrypnyk Liubov
Published: July 2023

The aim: To perform a clinical analysis of bronchiectasis in adults, to analyze the effectiveness of nebulizer therapy with hypertonic NaCl solution with hyaluronic acid
Materials and methods: All patients were performed clinical-functional examination (MRC dyspnea index, Sp O2, 6-minute walking test, external respiration function); calculated the index BODE, analyzed the SGRQ, studied the results of sputum. Statistical data analysis was performed using the Microsoft Excel for Microsoft 365 MSO 16.0.13530.2040418 package of statistical functions.
Results: The main symptom in 100% of cases was chronic cough with production of sputum. Patients were concerned about shortness of breath (91.7%), episodic hemoptysis (29.2%), systemic symptoms (fatigue, weight loss). Hypertonic NaCl solution has a direct mucolytic effect, osmotic and anti-edematous effect. Protection of the mucous membrane of the respiratory tract makes hyaluronic acid an ideal additional component of hypertonic saline solution. All patients showed a positive effect of treatment immediately. After 2 weeks, the respiratory rate decreased, the FEV1 index increased at 8.6 (p<0.05), SpO2 increased up to 93.75 ± 7.13%, the number of points according to the SGRQ decreased, BODE index also decreased
Conclusions: Leading clinical signs of bronchiectasis were: a chronic cough with daily sputum production (100% of patients), shortness of breath (91.7%). The use of nebulizer inhalations decreased shortness of breath at 17.6% (р<0.05), improved external respiratory function indices (FVCL increased at 9.7% (р<0.01), FEV1 at 8.6% (р<0.01)) and blood oxygen saturation increased at 4.9% (р<0.05)). The offered complex increased tolerance to physical exertion (the 6-minute walk test and 4-year survival (BODE prognostic index)
ANALYSIS OF THE PROBLEMS OF THE TEXTILE INDUSTRY AND WAYS OF RECYCLING ITS WASTE IN RUSSIA AND THE WORLD
Authors:   Federal State Budgetary Educational Institution of Higher Education «Bauman Moscow State Technical University», Orlov E. D. , Volkova Maria V. ,   Federal State Budgetary Educational Institution of Higher Education «Bauman Moscow State Technical University»
Published: July 2023

The authors analyze the flows of material waste from the textile industry and the efficiency of textile processing in the Russian Federation, justifying the need to use a circular economy model. There are the main tools for reducing waste in the textile industry, namely: reverse logistics, extension of the period of use of textiles, secondary use of textiles, secondary use of fabrics as raw materials for new products, wastefree production.
DEVELOPMENT OF A SYSTEM FOR MONITORING THEЧMAIN INDICATORS OF INNOVATION ACTIVITY
Authors:   Plekhanov Russian University of Economics, Moscow, Russia, Balakhanova Dariko K. , Kukushkin Sergey N. ,   Plekhanov Russian University of Economics, Moscow, Russia, Alekhicheva Anastasia V. ,   Plekhanov Russian University of Economics, Moscow, Russia, Tleubergenov Abdulaziz A.-Zh. ,   Plekhanov Russian University of Economics, Moscow, Russia, Tleubergenova Aziza A.-Zh. ,   Plekhanov Russian University of Economics, Moscow, Russia, Zakharova Anna V. ,   Plekhanov Russian University of Economics, Moscow, Russia
Published: July 2023

Today all spheres of life aimed at modernization with the help of innovative technologies. In this regard, there is a need for a multilateral market analysis in order to determine the type and effectiveness of innovation, as well as to identify risks. This article proposes the development of a program with the help of which it will be possible to trace the main indicators of innovation activity, its dynamics, as well as the adoption of effective strategies for the further development of both the organization and the industry under study as a whole.
FAKTOR-FAKTOR YANG BERHUBUNGAN DENGAN PENGETAHUAN REMAJA TENTANG INFEKSI MENULAR SEKSUAL DI SMKN 46 JAKARTA PERIODE MARET - JUNI 2018
Authors: Rahayu Khairiah  , Mariyani  , Fransistia Puspita Ningrum
Published: July 2023

ABSTRAKLatar Belakang : Di Indonesia, dilaporkan pada tanggal 1 Januari s.d 30 September 2015 kasus HIV terdapat 45% dan untuk kasus AIDS 36% untuk usia 15-19 tahun. Berdasarkan provinsi terutama di Jawa Barat terdapat 18% untuk kasus HIV dan 16% untuk kasus AIDS..Tujuan : untuk mengetahui faktor-faktor yang berhubungan dengan pengetahuan remaja tentang infeksi menular seksual di SMK N 46 Jakarta periode Maret – Juni 2018.Metode Peneltian : Penelitian ini menggunakan metode analitik dengan pendekatan cross sectional. Populasi dalam penelitian ini adalah seluruh siswa/siswi SMK N 46 Jakarta dengan menggunakan sampel Total sampling, yang berjumlah 58 orang. Data yang terkumpul dianalisa secara univariat dan bivariat.Hasil penelit : dari 58 responden terdapat responden dengan pengetahuan kurang sebanyak 28 responden (48,3%), sebanyak 23 responden (60,5%) prestasi kurang baik dikelasnya, sebanyak 21 responden (65,6%) mendapatkan informasi dari non media, sebanyak 21 responden (70,0%) tinggal di kost .
A Machine Learning Approach to Estimate Geo-mechanical Parameters from Core Samples: A Comparative Approach
Authors: Brahma Jwngsar
Published: July 2023

Geo-mechanical parameters and Thomsen parameters play very important roles to design a stable wellbore in a challenging environment. The main objective of this paper is to estimate Thomsen's parameters (ε, γ, δ) and geo-mechanical properties from the core samples by Machine Learning and a comparative analysis with the conventional mathematical approach; to place emphasis on the use of Machine Learning and Artificial Intelligence in the Oil & Gas industry and to highlight its future potential to help in the digital transformation of the industry. Two different Machine Learning models, the Ordinary Least Square method and the Random Forest method, were used to predict the aforementioned geo-mechanical properties from the wave velocity and confining pressure data. In this study, it has been observed that the approaches employed in the estimate of geo-mechanical properties are rapid and reliable (about 93.5 percent accuracy) and may be applied in geo-mechanical modeling for wellbore stability analysis for safe and cost-effective well plan and design on a large scale. The analysis in this work indicates that Young’s modulus and Poisson’s ratio are heavily influenced by the anisotropy parameters. Finally, a comparison is made with mathematical approaches. The machine learning and artificial intelligence approaches shown here are excellently matched with mathematical approaches. The geo-mechanical parameters and Thomsen parameters and be computed with reasonable accuracy with the help of our proposed ML algorithms. Our proposed ML model can predict the geo-mechanical parameters and Thomsen parameters from the velocity profile directly without complex mathematical computation. The mathematical model would have required us to first determine the stiffness constants for the prediction of that parameters. Additionally, we may conclude that a machine learning model needs to be trained with more modeling data to predict the right values with a smaller error margin. The number of data points required to train a model has a significant impact on the model's overall accuracy. Therefore, additional modeling data is needed to learn about and comprehend the intricacies, patterns, and interactions between provided input and output variables.
Panel Seemingly Unrelated Regression with Dummy Variables For Economic Modeling Of Developed And Developing Country
Authors: Pratama Muhamad Liswansyah , Fitriani Rahma , Astutik Suci
Published: July 2023

This study aims to identify the relationship between population density, inflation, and unemployment on the human development index, GNP, export-import, and urbanization in the category of developed and developing countries using the Panel Seemingly Unrelated Regression (Panel SUR) with a dummy variable as a slope component. This study uses economic data from 145 countries in the world obtained through the official websites of the World Bank and the International Monetary Fund. The results showed that the Fix Effect SUR model (AIC=84915.74) was better than the pooled SUR model (AIC=114936) and Random Effect SUR (AIC=1148415). The results of the analysis using the Fix Effect SUR model show that population density has a significant positive relationship with GNP, imports, and exports. There is a significant negative relationship between the unemployment rate and GNP. In addition, the results obtained show that the effect of population density on GNP in developed countries is positive and greater. The effect of the unemployment rate on GNP in developed countries is negative and greater than that of developing countries. The results of the analysis using the pooled SUR model and the Random Effect SUR are the same conclusion where population density has a significant positive relationship to GNP, imports, and exports. There is a significant negative relationship between inflation and GNP. The effect of population density and inflation on GNP, imports, and exports in developed countries is positive and greater than that of developing countries. The effect of the unemployment rate on GNP in developed countries is negative and greater than that of developing countries.
New Minerals from the Redmond Mine, North Carolina, USA: III. Cherokeeite and Cuprocherokeeite, Two New Minerals Containing [Pb2(Zn,Cu2+)(OH)4]2+ Chains
Authors: Kampf Anthony R. , Smith Jason B. , Hughes John M. , Ma Chi , Emproto Christopher
Published: July 2023

The new minerals cherokeeite, [Pb2Zn(OH)4](SO4)·H2O (IMA2022-016), and cuprocherokeeite, [Pb8Zn3Cu2+(OH)16](SO4)4·4H2O (IMA2022-086), were found in the Redmond mine, Haywood County, North Carolina, USA, where they occur together in a highly unusual secondary assemblage that comprises a variety of rare Pb-Zn-Cu sulfates, thiosulfates, and carbonates. Cherokeeite has the following properties: colorless to pale pink prisms or blades to about 1 mm; white streak; vitreous luster; brittle; Mohs hardness 2½; splintery fracture; at least two perfect cleavages; 5.011 g/cm3 calculated density; biaxial (+) with α = 1.745(5), β = 1.770(5), γ = 1.805(5), and 2V = 85(2)°. Cuprocherokeeite has the following properties: light blue prisms or blades to about 1 mm; very pale bluish-white streak; vitreous luster; brittle; Mohs hardness 2½; irregular, curved fracture; probably two good cleavages; 5.032 g/cm3 calculated density; biaxial (+) with α = 1.760(5), β = 1.770(5), γ = 1.800(5), and 2V (meas.) = 65(3)°. Electron probe microanalyses provided the empirical formulae [Pb2.00Zn1.00(OH)4](SO4)0.85(S2O3)0.15·H2O and [Pb8.14(Zn2.52Cu2+1.34)(OH)16][(SO4)3.07(S2O3)0.93]·4H2O for cherokeeite and cuprocherokeeite, respectively. Cherokeeite is monoclinic, P21/n, a = 17.1697(7), b = 6.47173(19), c = 17.5304(12) Å, β = 115.440(8)°, V = 1759.06(19) Å3, and Z = 8. Cuprocherokeeite is monoclinic, P21/n, a = 12.6828(5), b = 9.4629(5), c = 14.7876(8) Å, β = 94.798(4)°, V = 1768.53(15) Å3, and Z = 2. The structures of cherokeeite (R1 = 0.0425 for 2681 I > 2σI) and cuprocherokeeite (R1 = 0.0741 for 2411 I > 2σI) both contain edge-sharing chains of octahedra decorated by Pb2+ cations, which are strongly bonded to the chains via short Pb–O bonds. In cherokeeite, the octahedral cations are all Zn, whereas in cuprocherokeeite, one in every four cations is Cu2+.
Asymmetric Distributed Electric Propulsion VTOL Flying Wing: Conceptualization, Design and Flight Test
Authors:   ST Engineering Aerospace Ltd., Chan Keen
Published: July 2023

This paper presents aircraft concepts and designs which demonstrate that distributed electric propulsion can enable another paradigm in aircraft design: asymmetry. This attribute is leveraged upon to address operational issues relating to single motor failure. It is shown that the unique combination of minimum number of motors and a corresponding placement for which any one of the motors could fail, and full flight control in roll/pitch/yaw throughout VTOL and airplane modes can still be maintained, requires an asymmetric arrangement of six motors and their proprotors. This all-round redundancy is particularly important in applications where the aircraft, in the event of single motor failure during airplane mode cruise, needs to continue to be recoverable by VTOL mode landing in geometrically constrained environments (e.g. forested areas, small ships, urban locations etc.). In addition, the mechanical simplicity of the asymmetric arrangement enables the motors to be installed with a cant angle, thereby leveraging moment arm effects to enhance yaw control power. This is a much-needed enhancement for certain challenging operating conditions such as hovering or vertical landing in a crosswind. A small-scale prototype is designed, built and flight tested. Also presented is an example aircraft sizing of a larger scale variant to FAA Part 107 requirements, and it is shown that one area that can yield substantial improvement in loiter endurance is variable pitch proprotors.
Design-Oriented Study on the Public Acceptance of cargo eVTOL aircraft as a Revolutionary Vehicle Concept
Authors:   Yamato Holdings Co. Ltd., Ito Yu ,   Tokyo University of Science, Furue Nanami
Published: July 2023

The recent active development on eVTOL (electric vertical take-off and landing) aircraft has introduced various aircraft configurations and usage into the design space, including those that could have a very different appearance from any existing transportation means to the society. Most especially, logistics application of such vehicle system could give an even more strange impression to the general public, since it won't directly interact with them, but at the same time will be operated very near the living milieu of civilians. In order to achieve acceptance of such revolutionary aircraft concept from the society, this study conducts a questionnaire survey on the preferable exterior design to citizens not involved in the field of eVTOL development (n = 69), based on hypotheses derived from multiple human- and social-science studies. Design hypotheses examined here will include not only on liveries or coloring, but also options of changes on the airframe form, if necessary. As a result, it was discovered that people prefer a passenger-liner-like livery and a roundish form on the airframe. The design principle derived here should contribute orientating engineering towards a market-tolerant product development in the future.
Potential Army Repurposing of Digital Radio Frequency Memory (DRFM) Products for the Electronic Warfare, Tactical Environment
Authors:   US Army Aviation Engineering Directorate, Menees Brenda
Published: July 2023

The miniaturization of Digital RF Memory (DRFM) products is paving the way for a new generation of military products with tactical missions never before considered. Although DRFM products have been available and used in various capacities for many years, a reduction in size, weight, power, and cooling (SWAP-C) will allow the repurposing of an already proven technology.
A Comparison of Control Activity and Heart Rate as Measures of Pilot Workload in a Helicopter Tracking Task
Authors:   National Research Council Canada, Law Andrew , Jennings Sion , Ellis Kris
Published: July 2023

Two qualified test pilots performed a target tracking flight task on a Bell 205 helicopter. Cooper-Harper handling quality ratings confirmed that pilot compensation was proportional to task difficulty. Pilot control activity was measured using the Dynamic Interface Modeling and Simulation System Product Metric (DIMSS-PM) to quantify the number and amplitude of control deflections during each trial. Inter-beat interval measures of heart rate and heart rate variability were also computed to evaluate the pilot’s autonomic nervous system (ANS) response to task workload. The DIMSS-PM was positively correlated with task difficulty, as expected based on the dynamics of target motion for each difficulty level. By comparison, the mean and high-frequency (HF) variability of heart beat intervals were negatively correlated with task difficulty, suggesting an increase in ANS arousal with increased pilot workload. Pilot-specific differences were found in the time-dependent relationship between DIMSS-PM, mean heart beat interval, and HF variability, indicating that control activity and heart rate metrics provide asynchronous and complementary information about pilot workload during helicopter flight.
Cheeseman Award Paper: Isomorphic Spatial Visual Auditory Displays for Operations in DVE for Obstacle Avoidance
Authors:   US Army ADD, Godfroy-Cooper Martine ,   NASA Ames Research Center, Wenzel Elizabeth , Miller Joel , Bachelder Edward
Published: July 2023

Helicopter military missions such as combat search and rescue, medical evacuation and landing on unprepared sites can involve operating in hostile, low-altitude, and degraded visual environments (DVE). These conditions may significantly reduce the pilot's capability to use the natural out of the window (OTW) perceptual cues, increase workload and increase the risk of collision with terrain and natural or man-made obstacles. In modern helicopter cockpits, synthetic vision systems (SVSs) can employ conventional nonconformal two-dimensional (2D), egocentric three-dimensional (3D) conformal symbology (CS) and laser detection and ranging (LADAR)/ radio detection and ranging (RADAR)/ forward looking infrared (FLIR) imagery support guidance and control, especially during operations in DVE. Although 3D CS can decrease pilot workload, it can also produce attentional tunneling (cognitive capture) and may not provide maximally effective depiction of the environment around the helicopter. In this context, it is crucial to develop integrated multimodal interfaces that extend the current operational envelope while enhancing flight safety. Several flight simulator studies have investigated the use of spatial auditory displays (SADs) in combination with spatially and temporally congruent visual displays in tasks as diverse as collision avoidance, intruding aircraft detection, or system malfunction warning. In this paper we propose a novel approach to spatial sonification design based on the premises that perception-based synthetic cueing can increase situation awareness (SA), improve overall performance, and allow mental workload to be kept at operationally effective levels. This paper discusses the development, implementation, and evaluation of a sensor-based augmented-reality spatial auditory display (ARSAD) and its visual analog, an integrated collision avoidance display (ICAD) for all phases of flight. Five UH60M Army pilots participated in a low-level flight simulation evaluating the visual and the auditory displays, alone or in combination in low-visibility and zero visibility environments. The results are discussed in the context of pilot cueing synergies for DVE.
Advanced Rotorcraft Aeromechanics Simulations Using HPCMP CREATE™-AV Helios
Authors:   Advanced Rotorcraft Technology Inc., Roget Beatrice , Sitaraman Jay , Blumenstein Ryan , Taheri Mina , Saberi Hossein
Published: July 2023

The HPCMP CREATE™-AV Helios is a rotorcraft aeromechanics simulation framework that combines higher fidelity Computational Fluid Dynamics (CFD) based aerodynamic modeling with rotorcraft comprehensive analysis. Vehicles with multiple rotors and differing rotor frequencies require several enhancements to the traditional CFD/CSD coupling approach used for rotorcraft aeromechanics predictions. Additionally, CFD/CSD coupling modifications are also required for non-rotor aerodynamic entities such as fuselages and wings whose aerodynamic loads are influenced by the interference and impingement of multiple rotor wakes. Methodologies for consistently coupling multiple rotors with non-harmonic arbitrary frequencies are developed. The developed technique also allows for variations in rotor frequencies at each CFD/CSD coupling iteration. The methodology is successfully demonstrated to achieve full vehicle trim for the UH-60A with aerodynamic loading on all main wetted surfaces, i.e. main-rotor, tail-rotor, fuselage and stabilator wing, predicted using CFD-based modeling. A commercial quadcopter configuration is also studied to demonstrate the ability to achieve full vehicle trim using the rotor frequencies as control variables.
Effect of Ground Proximity on the Regressive Lag Mode during Ground Resonance : An Experimental Study
Authors:   Indian Institute of Technology Madras, Nair Salini , Ramachandran Akshay , Pandey Bittesh , Mohan Ranjith , M Rohith
Published: July 2023

This paper studies aerodynamic effects of ground on regressive lag mode damping during ground resonance. The experimental investigation is performed on a scaled helicopter model built to simulate the ground resonance scenario. The study involves both stationary as well as dynamic (oscillating) ground conditions. Experiments are conducted by measuring lead-lag damping at different rotor speeds (in the ground resonance regime) for different collective inputs. Results show that ground and its dynamics have a significant effect on regressive lead-lag mode damping during ground resonance.
Whirl Flutter Investigation of Hingeless Proprotors
Authors:   US Army CCDC ARL, Yeo Hyeonsoo , Kreshock Andrew
Published: July 2023

Hingeless proprotor whirl flutter in cruise flight is investigated using comprehensive rotorcraft analysis codes CAMRAD II and RCAS. Generic hingeless proprotor designs include conventional soft-inplane and stiff-inplane rotors operating at cruise tip speeds typical of existing tiltrotor systems, and a rotor which exhibits higher frequencies and operates at much lower cruise tip speed than existing rotor designs. The effects of blade elasticity, density, speed of sound, unsteady aerodynamics, and realistic airfoil tables on whirl flutter speed are examined. The US Army and NASA have been developing a new wind tunnel test system, TiltRotor Aeroelastic Stability Testbed (TRAST), and preliminary analysis for a notional TRAST hingeless rotor is also presented. The effects of precone, center of gravity, rotor rotational speed, and density on the TRAST whirl flutter stability are examined. CAMRAD II and RCAS show consistently excellent agreement with each other for wide variations of design variables and operating conditions.
Stability Analysis of Whirl Flutter in a Nonlinear Gimballed Rotor-Nacelle System
Authors:   University of Bristol, Mair Christopher , Rezgui Djamel , Titurus Branislav
Published: July 2023

Whirl flutter is an aeroelastic instability that affects propellers/rotors and the aircraft on which they are mounted. The complexity of its behaviour and analysis increases significantly with the addition of nonlinear effects. With their long and flexible rotor blades, tiltrotor aircraft are particularly susceptible. This paper investigates the impact of structural nonlinearity on the whirl flutter stability of a basic gimballed rotor-nacelle model, compared to a baseline linear stiffness version. A 9-DoF model with quasi-steady aerodynamics and blades that can move both cyclically and collectively in both flapping and lead-lag motions was adopted from existing literature. The nonlinearities investigated in this paper are cubic and quintic softening and hardening introduced to the gimbal flapping stiffness. The investigation is conducted through a combination of bifurcation and eigenvalue analyses, supplemented by time simulations. In some cases, the nonlinearities are shown to cause whirl flutter behaviour to exist in parameter value regions that are predicted to be stable by linear analysis. This impact is fully captured in the redrawn system stability boundary.
Time- and Frequency-Domain Whirl-Flutter Analysis using a Vortex Particle Method
Authors:   Oak Ridge Associated Universities, Corle Ethan ,   Pennsylvania State University, Schmitz Sven ,   US Army CCDC ARL, Kang Hao , Floros Matthew
Published: July 2023

The method of using the viscous vortex particle method (VVPM) to conduct whirl-flutter stability analysis is evaluated on a 4-bladed, soft in-plane tiltrotor model using the Rotorcraft Comprehensive Analysis System (RCAS). For the first time, coupled VVPM/RCAS transient simulations are used to calculate whirl-flutter stability. In addition, a novel concept of linearizing VPM solutions by perturbing trimmed VPM inflow velocities with dynamic inflow (DI) states is studied to make linearized stability predictions via eigenanalysis. Comparisons are made between several different levels of fidelity in prediction capabilities and against experimental data. Time-domain stability predictions are shown to capture the physical features of rotor airloads and rotor-to-wing interactional aerodynamics. Linearization of VPM solutions using DI is shown to accurately capture rotor airloads but currently does not properly capture the rotor-towing interaction. Baseline results are presented using VPM and uniform inflow (UI) wake models. DI is demonstrated to be significantly more accurate than UI and makes linearized stability predictions similar to those made using VPM. Linearized VPM frequency and damping predictions are shown to be insensitive to vortex particle resolution; however, a reduction in damping is shown for particle resolutions less than 2% of the rotor span using time-domain transient analysis and needs further investigation.
Challenges of applying the law of naval warfare in non-international armed conflict at sea
Authors: Fink Martin
Published: July 2023

The question of application of the law of naval warfare during non-international armed conflict (NIAC) at sea is still an area of uncharted waters. Some discussion on the matter surfaced in reaction to the Israeli naval blockades against Hamas and Hezbollah and the applicability of the law of blockade in NIAC, mainly limited to noting possible other historical examples. At this stage in the development of the law of armed conflict at sea in NIAC, there are no clear legal opinions or any direction to where this issue might go to. This article offers an introductory view on some challenges of applying the law of naval warfare during non-international armed conflict and a discussion on the use of the law of blockade in particular.
Who are the members of the accreditation commissions? Portrait, requests and expectations
Authors: Ripp T. М. , Iminov N. М. , Zverev A. S. , Yegorova V. S. , Konenkova N. В. , Ripp E. G.
Published: July 2023

Primary accreditation of specialists plays a key role in the growth of young doctors. The members of the accreditation subcommittees (ASC) occupy an important place in the process of primary accreditation.

   The purpose of this pilot single-center prospective research with anonymous questionnaires was to study aspects of the work and training of ASC members in order to develop a reasonable design of a multicenter research to study the “portrait” of an ASC member in order to subsequently form a request for the members preparation of subcommittees and develop practical recommendations for effective interaction between the accreditation site and ASC members.

   The questionnaires of 27 members of the subcommittees were analyzed. The pilot study reviewed the duration of participation in the work of the ASC, ways of preparing for work as experts and readiness to undergo additional training, satisfaction with the training of accredited medical students. In addition,  opinions were taken into account on the quality and the need to correct the passports of stations of an Objective Structured Clinical Examination (OSCE), optimize the work schedule during the period of accreditation of specialists, as well as proposals for improving, increasing the efficiency and coordination of the work of the ASC with accreditation sites. The pilot project aroused serious interest among the participants of the XI Congress of the Russian Society for Simulation Education in Medicine (ROSOMED) and the international conference 2022 in Moscow. The reason is this study showed the importance of taking into account the opinions of members of the ASC, as direct participants in the accreditation process, which makes it possible to develop the design of a multicenter international study, the data of which will make it possible to offer evidence-based recommendations to improve the interaction between participants in the accreditation process in medicine and improve its quality in the Russian Federation, with a possible broadcast on the territory of the interested countries participating in the study.
Experiencias de aprendizaje creativas para el desarrollo de valores ambientales en estudiantes del nivel bachillerato
Authors: Eduarte Saltos Ronald Fabricio , Zambrano Montes Lubis Carmita
Published: July 2023

Desde un enfoque de la educación creativa es necesario la práctica de valores ambientales orientados a la concientización de los educandos sobre el cuidado y protección del entorno. El presente estudio tuvo como objetivo determinar las experiencias de aprendizajes creativas para el desarrollo de valores ambientales en estudiantes del nivel Bachillerato del circuito 13D02C15_a del catón Montecristi-Ecuador. Se desarrolló bajo un enfoque cualicuantitativo de tipo exploratorio y de campo, se utilizaron métodos teóricos de análisis y síntesis para profundizar en el objeto de estudio y como técnica la encuesta a estudiantes y docentes, además de la entrevista a directivos. Los resultados demuestran que no existen los suficientes conocimientos de experiencias exitosas en educación ambiental y se utilizan limitadas estrategias didácticas que fomentan los valores para la promoción del medio ambiente. Se concluye que existe un insuficiente uso de experiencias de aprendizaje en el aula que permita la promoción de valores ambientales. Sin embargo, el estudio destaca que son los proyectos educativos continuos de reforestación por especie una experiencia de aprendizaje creativa que está dando sus primeros pasos en los centros educativos y que desarrolla el valor ambiental del respeto hacia la naturaleza.
A Ten-Year Review of the Management of Medical Patients in the Intensive Care Unit in a Resource-Poor Setting in Southern Nigeria
Authors: Victor Abhulimen , Ayanate Oruobu-Nwogu
Published: July 2023

Purpose: The Intensive Care Unit (ICU) is a specialist ward within a hospital, with a concentration of expertise and resources for the management of critically ill patients. Some clinicians think of the ICU only in relation to surgical practice, maybe because many intensivists are anaesthesiologists and anaesthesia is closely linked to surgery. However, this notion may not be entirely true. This study aims to highlight the importance of the ICU to patients with medical challenges.

Methodology: This is a ten-year retrospective study conducted at the University of Port Harcourt Teaching Hospital. Ethical approval for the study was sought and gotten from the hospital’s ethical committee. All patients who were admitted into the ICU with medical diagnosis were included in this study. The information gotten includes history, age, sex, diagnosis, length of admission, and outcome. The data collected was analyzed and presented in tables and charts.

Findings: The mean age was 51.41±20.12. The highest age was 95 years. The mean bill paid was 80,718.55 Naira and the largest bill paid was 605,500 Naira while the least bill paid was 2000. The mean duration of stay was 6.59 days and ranged from a day to 120 days. The males were 268 (51.8%) while the females were 249(48.2%). Two hundred and sixty-five patients (51.3%) died during the study period. Patients who were transferred out of the ICU spent the highest amount of money and spent the most time (10.19 days) in the ICU. The patient who died spent the least amount of time (4.56 days) in the ICU. A hundred and two patients were discharged from the ICU. Transferring them to a high dependency unit or ward will save cost. As the age increased, the comorbidities also increased with 309 out of 517 having comorbidities. Exacerbation of comorbidity led to admission in the ICU.

Recommendation: Medical patients admitted into the ICU tend to have a higher mean age and have a higher mortality rate. Older patients tend to have more comorbidity. Proper and effective management of the ICU will save cost. Proper management of comorbidities in older patients can lead to an improvement in health. Patients who are fit, could be transferred to other wards and discharged from there, this will free up beds in the ICU, increase effective use of the ICU and save cost.
Automatic Water Quality and Fish Feed Monitoring System in Aquarium Using LORA
Authors: Ilmi Muhammad Fariz , Syahrorini Syamsudduha , Ayuni Shazana Dhiya
Published: July 2023

Keeping ornamental fish, especially guppies, is a type of ornamental fish that is widely kept because it has a very beautiful color pattern. The growth of guppies is influenced by environmental factors, including water temperature, water pH, and water turbidity. Fish feed is also a very important factor in the survival of fish. In general, the ideal temperature that can make guppies develop well between the range of 23-27 °C, the pH of the water is in the range of 6-8 pH. and the turbidity of guppy water requires a water turbidity level of 0-25 NTU.

The purpose of this study is to design and create a water quality monitoring system in guupies using LoRa and automatic feeding according to realtime. The hardware used is Arduino Uno as a microcontroller, LoRa SX1278 as long-distance communication, Turbidity Sensor, DS18B20 temperature sensor, water pH sensor as LCD 16x4, RTC, Relay, Water pump. The system created can monitor the water temperature, water turbidity level, and Ph of aquarium water automatically. Testing is carried out by detecting the quality of aquarium water with all sensors simultaneously to determine the condition of the water which will later be monitored using LoRa. The test results determine if the water state is cloudy with a range of >2000 NTU, the water pump will automatically turn on until the water state reaches the range of <2000 NTU.
Ser mujer, una obra de coraje. Narrativas de mujeres salvadoreñas en el siglo XXI
Authors: Vásquez Monzón Olga
Published: July 2023

Los cambios económicos, jurídicos, políticos, científicos y culturales han favorecido la desestructuración de la identidad femenina patriarcal. En el caso de El Salvador, al menos desde los Acuerdos de Paz, el activismo sociopolítico desplegado por los diversos movimientos feministas y las organizaciones de mujeres han cuestionado la definición de mujer como un ser en función de otros. Varios estudios producidos en El Salvador en años recientes dan cuenta de la proyección de las mujeres en el espacio público a través de la ciencia, la economía, la política y la cultura. Pese a ello, la reflexión en torno a cómo estos cambios han impactado la narrativa de las mujeres en los espacios cotidianos está pendiente. Desde el campo de los estudios culturales, esta investigación analiza las narrativas de mujeres salvadoreñas con el objetivo de identificar continuidades y/o rupturas del modelo de identidad femenina patriarcal en el siglo XXI.
ECA Estudios Centroamericanos, Vol. 77, No. 770, 2022 : 35-60.
reestructuración de las actividades administrativas y operacionales dentro de las medianas y grandes empresas salvadoreñas en el contexto de la pandemia COVID-19
Authors: Vaquerano Amaya José Adán , Mártir Ana Lorena
Published: July 2023

La pandemia COVID-19 provocó una reestructuración de las actividades administrativas y operacionales en las organizaciones salvadoreñas, de tal forma que fueran desarrolladas bajo un escenario acorde a la nueva realidad, marcado con grandes variaciones en relación con lo que hasta ese momento se conocía como normal. Tanto colaboradores como empleadores se embarcaron en la tarea de diseñar e implementar estrategias para mantener en marcha las actividades productivas en un entorno seguro, a través de medidas de higiene y distanciamiento social y, de esa manera, afrontar adecuadamente los efectos negativos provocados por la crisis sanitaria y económica a causa de la pandemia.
ECA Estudios Centroamericanos, Vol. 77, No. 770, 2022 : 61-80.
Ajustando la economía familiar en tiempos de COVID-19
Authors: López Meraris C.
Published: July 2023

Si bien la pandemia del COVID-19 ha generado efectos adversos a diversas escalas, tanto globales y nacionales como locales, es innegable que los impactos se han diferenciado y la contención del virus ha sido exitosa en función de las condiciones materiales y las capacidades humanas de las que se disponen. A nivel de los hogares, que es el foco de esta investigación, ha salido a la luz cómo la prevalencia de las desigualdades socioeconómicas ha tenido diversos efectos en los grupos superior, medio e inferior de la escala social.
Esta investigación retrata desde una perspectiva más vivencial, elaborada a través de entrevistas en profundidad con personas clave, cómo los hogares salvadoreños enfrentaron la pandemia e identifica las diferentes estrategias tomadas en función de la realidad socioeconómica del hogar. Profundiza en las repercusiones que se tuvieron en los diferentes estratos sociales dependiendo de la situación laboral, la división sexual del trabajo, las condiciones materiales previas en los hogares y los ajustes que las familias tuvieron que hacer dentro de los hogares para enfrentar la pandemia en general y, particularmente en la cuarentena domiciliaria en El Salvador, destacando que se trataba de una de las más largas del mundo, superando los 80 días de aislamiento, lo que implicaba un cese prolongado de diversas actividades económicas formales e informales y el deterioro de la economía familiar, principalmente de aquellos hogares en condiciones de vulnerabilidad preexistentes.
ECA Estudios Centroamericanos, Vol. 77, No. 770, 2022 : 91-98.
EMISSÕES DO CICLO DE VIDA DE CO2, EMISSÕES EVITADAS E TEMPO DE RECUPERAÇÃO DE ENERGIA PARA SISTEMAS FOTOVOLTAICOS NO BRASIL
Authors: Guerreiro Larissa Ribeiro , Pacca Sérgio Almeida
Published: July 2023

Sistemas fotovoltaicos, que convertem a energia solar em eletricidade, são uma alternativa para a redução das emissões de gases do efeito estufa. A instalação desses sistemas vem crescendo no mundo e no Brasil. Apesar de serem considerados livres de emissão durante a sua fase de operação, o ciclo de vida dos sistemas fotovoltaicos libera CO2. A fabricação dos módulos consome energia, que pode vir de fontes fósseis, e liberar CO2, durante a combustão. Assim, a fim de determinar a real contribuição ambiental dos sistemas fotovoltaicos, avaliações do ciclo de vida (ACV) buscam calcular as emissões e o tempo de recuperação de energia dos sistemas instalados pelo mundo afora. Neste trabalho realizamos uma revisão da literatura de ACV de sistemas fotovoltaicos e buscamos harmonizar os valores de EPBT e emissões de CO2 para sistemas instalados no Brasil, considerando a faixa de irradiação solar no território nacional. A disponibilidade de radiação solar no Brasil varia e afeta as emissões evitadas pela instalação de sistemas fotovoltaicos, que também dependem das emissões das tecnologias evitadas. Mesmo considerando, estas variações e a média do fator de emissão da eletricidade da rede, as instalações fotovoltaicas no Brasil podem evitar de 346 a 366 g de CO2 por kWh de energia gerada pelos sistemas. Já a mediana do tempo de recuperação de energia varia de 1,2 a 8,9 anos, para, respectivamente, os valores máximos e mínimos de irradiação.
Prática das danças urbanas em contexto escolar: memória e atenção de escolares de 7 e 8 anos
Authors: Sousa e Silva Cielle Amanda de , Gasparotto Guilherme da Silva
Published: July 2023

Este estudo, do tipo experimental com enfoque quantitativo e corte longitudinal, objetivou verificar possíveis alterações na memória e na atenção de escolares de 7 e 8 anos com a prática das danças urbanas na escola. A amostra final foi de 65 escolares divididos em grupo intervenção e controle, submetidos a dois testes cognitivos. No primeiro teste, o grupo controle atingiu no pré e pós-teste, respectivamente, uma média de acertos de 19,9 (Desvio Padrão – DP = 1,98) e 19,2 (DP = 2,33); já o grupo intervenção acertou, respectivamente, 19,4 (DP = 2,47) e 21,5 (DP = 2,50) (p<0,05). No segundo teste, o grupo controle aumentou seu tempo de resposta enquanto o grupo intervenção diminuiu. Identificou-se melhoras relevantes na memória e na atenção do grupo que recebeu a intervenção e, com isso, espera-se aproximar o conteúdo dos professores bem como fomentar possíveis avanços científicos sobre o tema.