bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantitative Analysis of Fuel Film Formation and Evolution Following
Spray Impingement
Authors: Qiu Shuyi , Wang Shangning , Li Xuesong , Xu Min , Nour Mohamed
Published: January 2025

Flash boiling spray has exhibited remarkable atomization performance by utilizing
the sudden alterations in the thermodynamic state of the fluid during injection.
The notable evaporation properties of flash boiling spray provide potential
remedies for the problem of fuel film adhesion resulting from spray-wall
impingement, especially during cold starts in reciprocating engines. Multi-hole
injectors, which are often employed, frequently experience spray collapse under
flash boiling conditions. The collapsing spray impinging a wall involves a
complex multi-phase coupling mechanism. Once the spray impinges the wall, the
heat and mass transfer between the wall and the adhering liquid film complicates
the predictability of the fuel film characteristics. The quantitative evaluation
of fuel film is crucial for studies on wall impingement. Nonetheless, the
quantitative measurement of phase change fuel films necessitates addressing
multiple problems, including evaporation and vapor phase interference. This work
utilizes Mie scattering photography and Laser-Induced Exciplex Fluorescence
(LIEF) techniques to examine the multi-plume spray impingement process. The
impacts of the flash boiling superheat index and wall temperature were examined,
alongside a quantitative analysis of the evolutions in the thickness, area,
mass, and temperature of the adherent fuel film. The study results indicate that
the spray collapses at a low superheat index. High fuel temperature diminishes
liquid volume flux, hence reducing the mass of droplet impinging on the wall.
The mass of the deposited fuel film reduces with an increase in fuel
temperature, but low plate temperatures hinder evaporation and increase the mass
of fuel film. The interplay of impinging droplets and evaporation governs fuel
film’s thickness and temperature. Under flare flash boiling conditions, even
with a plate temperature of -25°C, the adhered film comprising merely 4% of the
total injected fuel.
Feedforward Control of Clamping Force in Electronic Mechanical Brake
System Based on Inertia Identification and Load Torque
Observation
Authors: Wan Xiaobo , Shang Ruipeng , Li Yingchun
Published: January 2025

The braking system is an essential element for ensuring the safe operation of
vehicles. This research investigates the influence of electronic mechanical
brakes on the control performance of permanent magnet synchronous motors, with a
particular focus on variations in the load torque and inertial load. This study
addresses challenges such as delayed responses in the clamping force and
diminished control accuracy. To mitigate these issues, a Luenberger load torque
observer is utilized for the real-time identification of load torque. The
identified load torque is subsequently converted into a compensation current,
which is integrated into the current loop as a feed-forward compensation signal
to enhance the control performance. Additionally, to reduce the impact of
variations in inertial load on the overall control system, this study employs a
model reference adaptive algorithm for the online identification of rotational
inertia, with the identification results being fed back to the load torque
observer. The efficacy of this approach was validated through the development of
a corresponding simulation model. Simulation outcomes indicate that the proposed
strategy for identifying rotational inertia and implementing load torque
feed-forward compensation significantly enhances the accuracy of clamping force
control and the system's resistance to interference in electromechanical brakes,
thereby offering a novel technical pathway for achieving high-precision brake
control.
Model Predictive Torque Control of PMSM Without Weighting Factors
Based on MRAS Parameter Identification
Authors: Zhang Yanqing , Jia Danyang , Yin Zhonggang , Liu Qi
Published: January 2025

The design of weighting factors in the cost function of traditional model
predictive torque control (MPTC) is relatively cumbersome, at the same time, the
accuracy of the prediction model decreases obviously when the motor parameters
are mismatched. Therefore, a model predictive control without weighting factors
based on on-line identification of motor parameters is studied. Firstly, the
control objectives transformed from torque and flux of traditional MPTC to
active torque and reactive torque, since they are of the same dimension the
design of weighting factors is unnecessary. Secondly, aiming at the problem of
control performance degradation caused by the change of motor parameters in the
prediction model, the online identification of motor parameters based on model
reference adaptive system is studied, the identification results are applied to
the prediction process to avoid the bad influence caused by the parameter
variation. The findings from the simulation indicate that the proposed
methodology maintains both the dynamic and steady-state performance
characteristic of traditional MPTC, while also eliminating the need for
weighting factors. Furthermore, it demonstrates an ability to accurately
identify motor parameters and enhance control performance in response to
parameter variations.
Research on Hydrogen Production Process by Photothermal-Driven
Sludge-Coal Thermochemical Synergistic Conversion
Authors: Li Guangyang , Xue Xiaodong , Wang Yulin
Published: January 2025

In recent years, the amount of industrial sewage sludge awaiting treatment has
continued to rise steadily, posing serious risks to human health and the
ecological environment if mishandled. This study proposes a photothermal-driven
supercritical water co-gasification of sludge-coal thermochemical synergistic
conversion system for efficient hydrogen production. The main feature is that
the medium-low temperature exothermic heating method uses concentrated solar
energy to provide reaction heat for the co-gasification process. This approach
synergistically converts solar energy into syngas chemical energy while meeting
the heat demand of the co-gasification hydrogen production process. The results
show that this co-gasification system for hydrogen production can achieve an
energy efficiency of 56.82%. The sensitivity analysis shows that the molar flow
rate of hydrogen increased from 44.02 kmol/h to 217.51 kmol/h as the
gasification temperature increased from 500°C to 700°C. The concluded that the
increase in temperature is favorable for the preparation of hydrogen. When the
gasification pressure is increased from 230 bar to 310 bar, the molar flow rate
of hydrogen decreases from 166.06 kmol/h to 138.09 kmol/h. The concluded that
the gasification pressure does not have much effect on the preparation of
hydrogen. The hydrogen yield increases continuously as the ratio of dry coal to
dry sludge rises from 1.5 to 3. Under the same dry coal to dry sludge ratio, the
hydrogen yield increases with the rise in total moisture content. Through the
above research, the multi-energy complementary method of photothermal-driven
sludge-coal thermochemical synergistic conversion is clarified. This establishes
a novel approach that achieves both clean treatment and resource utilization of
sludge simultaneously.
Research on Engine Thermal Management System Modeling and the Control
Strategies of an Extended-Range Hybrid Electric Vehicle
Authors: Pan Shiyi , Zhang Nan , Zheng Junli , Sun Tianfu , Zidi Li
Published: January 2025

A mathematical model of the thermal management system (TMS) for an extended-range
hybrid electric vehicle is developed. The variation in engine coolant
temperature is examined under different water pump and fan control strategies,
and its subsequent impact on engine TMS energy consumption is analyzed. Based on
the simulation results of energy consumption under various control parameters,
machine learning regression models are constructed, and four different
regression algorithms are applied. By incorporating temperature-based
optimization into the water pump and fan control strategy, system energy
consumption can be effectively reduced. The machine learning regression results
indicate that the mathematical model of TMS cannot be simply regarded as a
linear model. ANN and SVM regression show high degree of agreement with the
mathematical model. This study provides a theoretical foundation for the
development of data-driven tool for optimizing real-time TMS control
strategies.
Analysis of the Battery Direct Cooling Thermal Management System
Coupled with Passenger Cabin Air Conditioning in Extended-Range
Vehicles
Authors: Li Li-Jie , Su Chuqi , Wang Yi-Ping , Yuan Xiao-Hong , Liu Xun
Published: January 2025

To investigate the characteristics of a battery direct-cooling thermal management
system integrated with the passenger compartment air-conditioning in a
range-extended hybrid electric vehicle (REV), a model of the vehicle’s
direct-cooling and liquid-cooling thermal management systems was established in
GT-SUITE software. The findings are as follows: (1) Under high-temperature
fast-charging conditions, the direct-cooling thermal management system exhibited
improved performance indicators compared to the liquid-cooling system.
Specifically, the charging time was reduced by 3.8%, the maximum heat exchange
power increased by 27.33%, the battery temperature decreased by 2.37°C, the
thermal decay rate was only 6%, and the average system energy efficiency ratio
increased by 8.37%. (2)The outlet pressure of the direct-cooling plate
significantly affected the temperature reduction of the battery pack during
high-temperature fast-charging. The results indicated that within a certain
range, a lower outlet pressure of the cooling plate led to a greater average
temperature reduction of the battery pack. (3)Under high-speed cruising
conditions, the direct-cooling thermal management system also demonstrated
improved performance indicators compared to the liquid-cooling system. Notably,
the average temperature reduction of the battery pack increased by 18.8% with
the direct-cooling system. The inlet water temperature of the electric motor and
the temperature reduction in the passenger compartment were nearly identical and
met thermal safety requirements. (4)Significant differences in battery pack
temperature reduction were observed under three thermal balance conditions with
the direct-cooling thermal management system. Specifically, the temperature
reduction was smallest during high-speed cruising and largest during high-speed
climbing, with an increase of 13.52% compared to high-speed cruising. This study
provides a theoretical basis for the practical application of direct-cooling
thermal management systems in range-extended vehicles.
Research on Fuel Cell Vehicle Performance Based on PEMFC Stack
Degradation
Authors: Li You , Du Jing , Guo Donglai , Wang Kai , Wang Yupeng
Published: January 2025

The degradation of vehicle performance resulting from powertrain degradation
throughout the lifecycle of alternative energy vehicles (AEVs) has consistently
been a focal issue among scholars and consumers. The purpose of this paper is to
utilize a one-dimensional vehicle simulation model to analyze the changes in
power performance and economy of fuel cell vehicles as the Proton Exchange
Membrane Fuel Cell (PEMFC) stack degrades. In this study, a simulation model was
developed based on the design parameters and vehicle architecture of a 45kW fuel
cell vehicle. The 1D model was validated for accuracy using experimental data.
The results indicate that as the stack performance degrades, the attenuation
rate of the fuel cell engine is further amplified, with a degradation of up to
13.6% in the system's peak output power at the End of Life (EOL) state after
5000 hours. Furthermore, the level of economic performance degradation of the
complete vehicle in the EOL state is dependent on the driving cycle, with higher
hydrogen consumption attenuation observed under aggressive driving
conditions.
A High-Precision Simulation Model of a PEMFC System for Key Component
Selection and Performance Prediction
Authors: Yu Peiwen , Wang Yanbo , Zhao Xiaojun , Pan Fengwen , Shi Baofan , Yang Feng , Qiao Xingnian , Shan Fengxiang , Cheng Xiaoxian , Zhang Yaran , Zhang Chun , Sun Yuling , Gao Yong , Feng Gang
Published: January 2025

The selection of the key components of proton exchange membrane fuel cell (PEMFC)
crucially impacts the performance. This work developed a model of the fuel cell
system model to simulate the power consumption of component and system and the
temperature dynamic response of stack in real systems. A PEMFC simulation model
was developed based on AMESim, encompassing the air supply subsystem, hydrogen
supply subsystem, and the hydrothermal management subsystem. The parameters for
the flow and pressure of hydrogen, air, and water were established based on the
operational requirements to ensure efficient stack performance. Furthermore, a
PID control model was employed to regulate the flow and pressure parameters of
hydrogen, air, and water, in accordance with the operational requirements, to
ensure optimal PEMFC system performance.The purpose of this study is to predict
the power consumption of the key components and the overall system, as well as
to analyze the compliance with fuel supply, oxidant delivery, and reactor
cooling requirements, thereby validating the suitability of the selected key
components.For a 40 kW PEMFC system, the suitability of the component selection
was validated by comparing the simulation outcomes against empirical data,
yielding a mean absolute percentage error (MAPE) below 0.64%. This indicates
that the model can be used to predict the output performance of the fuel cell
under different conditions and has significant instructive value. The main
contents of the paper are as follows:

A
PEMFC simulation model encompassing air, hydrogen supply, and
thermal management systems has been
created.

The operational parameters of
the fuel cell system, including hydrogen gas, air, and water flow
rates and pressures, are precisely controlled by the PID control
system.

For a 40 kW fuel cell system,
the suitability of component selection was validated by comparing
simulation outcomes against empirical data, yielding a MAPE below
0.64%.
The Influence of Excess Air Ratio on NOx Emissions of Turbocharged
Direct Injection Hydrogen Internal Combustion Engines
Authors: Peng Tianyu , Luo Qinghe , Tang Hongyang
Published: January 2025

Direct injection in the cylinder of a hydrogen internal combustion engine results
in increasing NOx emissions in high-temperature oxygen rich environments. To
explore the effect of excess air ratio λ on the NOx emissions of a direct
injection hydrogen fueled internal combustion engine (HICE), a CFD simulation
model was built based on a turbocharged direct injection hydrogen internal
combustion engine using Converge software, and investigates the impact of lean
burn on the NOx emissions. The simulation results show that increasing the
excess air ratio λ can lower the in-cylinder mean temperature and effectively
reduce the generation of NOx. The maximum temperature difference between λ=2.1
and λ=2.7 is 400K when engine speed is 4500 r/min. As the engine speed
increases, under the same condition of λ, different loads at different speeds
result in differences in the reaction temperature inside the cylinder, with
higher temperatures at high speeds, so both the cylinder temperature and NOx
emissions increase. The maximum cylinder pressure and mean cylinder temperature
also increase when engine speed increase.
Calculation and Analysis of Carbon Emissions for Fuel Vehicles and
Electric Vehicles
Authors: Xie Haonan , Lin Guangyu
Published: January 2025

With the increase in vehicle population, the environmental problems caused by
excessive carbon emissions from vehicles are becoming increasingly serious.
Currently, China is actively promoting the development of electric vehicles to
reduce carbon emissions. However, the electricity used by electric vehicles is a
secondary energy source, and thermal power generation still dominates China's
current power structure, so electric vehicles will indirectly contribute to
carbon emissions during use. Calculating and analysing the carbon emissions of
fuel vehicles and electric vehicles will give a better idea of the environmental
advantages of electric vehicles. In this paper, the World Light Vehicle Test
Cycle (WLTC) are selected, and the energy consumption is calculated by the
energy consumption formula of fuel and electric vehicles under different
conditions, and the carbon emission is obtained by the carbon emission
coefficients of gasoline and electric energy. Through MATLAB calculation, the
carbon emission of the fuel vehicle under one WLTC cycle is 0.146kg in the
uniform speed condition, 2.529kg in the constant acceleration condition, 0.444kg
in the deceleration condition, 0.137kg in the idling stop condition, in the
whole WLTC condition is 3.256kg. The carbon emission of the electric vehicle is
0.144kg in the uniform speed driving condition,2.31kg in the constant
acceleration driving condition, 667.75W·h of electric energy recovered in the
deceleration condition, and 2.057kg in the whole WLTC cycle. the results show
that the electric vehicle is more environmentally friendly than the fuel
vehicle.
Modeling, Simulation and Hardware in the Loop Test of PEM
Electrolysis System
Authors: Hua Yuwei , Tian Ying , Tao Yuepeng
Published: January 2025

PEM electrolysis system has characteristic of excellent performance such as fast
response, high electrolysis efficiency, compact design and wide adjustable power
range. It provides a sustainable solution for the production of hydrogen, and is
well suited to couple with renewable energy sources. In the development process
of PEM electrolysis controller, this article originally applied the V-mode
development process, including simulation modeling, RCP testing, and HIL
testing, which can provide guidance in the practical application of electrolytic
hydrogen production. In this paper, we present modeling and simulation study of
PEM water electrolysis system. Model of electrolytic cell, hydrogen production
subsystem and thermal management subsystem are constructed in Matlab/Simulink.
Controller model was designed based on PI control strategy. A rapid prototyping
controller with MPC5744 chip was used to develop the control system of
electrolytic hydrogen production system. Hardware in the loop test system is
designed with PXI hardware and NI VeriStand software. The simulation results
indicate that the working current density is 1.0 Acm-2, at 25°C and 55°C, the
electrolytic voltage of PEM electrolytic cell is 2.0093V and 2.06218V,
respectively, and the electrolytic efficiency is 74.25% and 72.35% relative to
the thermal neutral voltage of 1.492V. Performance simulation of electrolytic
hydrogen production system and hardware in the loop testing of the controller
were completed on this development platform. Practical applications have shown
that this model based development platform can greatly improve development
efficiency. It is applied to the development process of PEM electrolysis
controllers to accelerate development speed and efficiency, and has certain
engineering significance.
Investigation on the Influence of Nozzle Shape on Supersonic Hydrogen
Jet
Authors: Yan Chao , Luo Qinghe , Li Yikai , Tang Hongyang
Published: January 2025

The global energy crisis and environmental pollution problems have accelerated
the process of the new energy technology revolution. Hydrogen energy is
considered as one of the main forces of future green energy. Hydrogen internal
combustion engines (H2ICES), as one of the main power forms of hydrogen energy
application, have received extensive attention. It is worth noting that the
characteristics of hydrogen jet affect the combustion performance and emission
performance of hydrogen engines because they are directly related to the mixture
formation process. In this paper, for a certain inner-opening direct injection
(DI) nozzle, the Computational Fluid Dynamics (CFD) research method is used to
explore the jet characteristics of the straight-hole (SH) nozzle, the
diverging-tapered-hole (DTH) nozzle, and the stepped-hole (STH) nozzle from
aspects such as mass flow rate, hydrogen mass fraction field, velocity field,
and pressure field. The results show that for inward-opening DI nozzles with a
cap, the nozzle inlet size within the shielding cap is the dominant factor
influencing hydrogen flow, as it primarily determines the jet characteristics.
Conversely, nozzle volume and outlet size have minimal impact on the mass flow
rate. Under identical inlet conditions, the DTH nozzle exhibits superior flow
performance. These results will have certain guiding significance for the design
of DI nozzles and promote the commercial application process of H2ICES.
Hydrogen Energy and Dongfeng Hydrogen Engine
Development
Authors: Jin Xiaoyan , Zhang Shemin , Duan Shaoyuan , Liu Cong , Zhou Hongli
Published: January 2025

Hydrogen energy is the best form of energy to achieve "carbon peak, carbon
neutrality", and is known as the most promising clean energy in the 21st century
because of its diverse sources, clean and low-carbon, flexible and efficient,
and wide application sce-narios. Hydrogen internal combustion engine has the
advantages of zero carbon emission, high efficiency, high reliability and low
cost, and has become one of the important directions of hydrogen energy
application. The paper first analyzes the development and application of
hydrogen energy industry in recent years, covering many aspects such as laws and
regulations, energy structure, realization path, and development status. Then,
the research and development process of the hydrogen engine of the technical
team of Dongfeng Motor Group Co., Ltd. R&D Institute Department is
introduced, and the effective thermal efficiency of 45.04% is achieved. Finally,
the future of hydrogen engine is further prospected.
Quality Service Provision after Recovering from COVID-19 Pandemic among Passengers Using Bus Transport in Tanzania
Authors: Ngalesoni Obedi , Msendo Adam , Mwakifwamba Geofrey
Published: January 2025

The research examines the impact of Standard Operating Procedures (SOPs), passenger satisfaction, and bus company expectations on the provision of quality services. The study usedthe SERVQUAL theory, which highlighted the gap between customer expectations and perceptions of actual service delivered. Cross-sectional design with a quantitative approach was employed, utilizing structured questionnaires for 300 bus passengers and semi-structured interviews with 20 bus operators. Regression analysis was applied to assess the relationship between the independent variables and the quality of service provision. Findings revealed a strong relationship between SOPs, passenger satisfaction, and bus company expectations with service quality, explaining 54.3% of the variance in service quality. The study indicates that these factors significantly influence the satisfaction of passengers and the adherence to post-pandemic operational standards. The results provide insights for bus companies to improve service delivery by addressing SOPs, enhancing customer experiences, and aligning operational expectations with passenger needs. These findings offer practical recommendations for the transport sector to enhance service standards and foster recovery in the post-COVID-19 era.
Putative Mechanisms of Immune Dysfunction in the Pathogenesis of Type 1 Diabetes Mellitus: A Scoping Review
Authors: Okafor Michcael T
Published: January 2025

Type 1 Diabetes Mellitus is a complex disorder characterized by autoimmune destruction of insulin-producing pancreatic beta cells. Immune dysfunctional mechanisms underlying its pathogenesis remain elusive. Immuno-toxic lifestyle habits (poor diet, inadequate sleep and lack of exercise) contribute to the pathogenesis of Immune-Mediated Inflammatory Diseases (IMIDs). There are disease models of T-cell dysfunction that describe the systemic inflammatory disease processes that underlie IMIDs. These disease models do not highlight the roles of immunotoxins in the disease pathogenesis. Online searches were conducted on databases such as Google Scholar, PubMed, Biomed Central, and SciELO. Articles were reviewed using keywords such as Immune optimization/dysfunction, T cell activation/dysfunction, cytokines, Type 1 DM, cellular adhesion molecules and inflammatory pathogenesis. This review proposed a putative immune dysfunctional disease model for Type 1 DM, which multi-omic studies may validate. Insights from the putative disease model can guide effective therapeutic interventions.
Black Sock Tops: Effective Low-Cost Eye Shields for Phototherapy
Authors: Park Sophia J , Sleeth Clark , Abdulkadir Isa
Published: January 2025

Background: In low-resource settings, there is often a challenge with sourcing effective eye protection for newborns undergoing intensive phototherapy as treatment for neonatal jaundice.
Objective: To evaluate the efficacy of sock tops as an eye-shielding alternative for use in intensive phototherapy.
Methods: This study evaluated the efficacy of black, gray, and white thick, elastic, sock tops in various materials as eye-shielding alternatives for use in intensive phototherapy.
Results: Wool, cotton, and polyester black sock tops provided acceptable levels of shielding at all levels of irradiance when layered. However, white and gray sock tops in the same material did not provide adequate shielding, even when layered.
Conclusion: Black sock tops may provide an accessible, low-cost alternative to commercial eye patches in low-resource settings, especially when confirmatory testing with an irradiance meter is available.
Heat stress in dairy cows: A review of abiotic and biotic factors, with reference to the subtropics
Authors: Erasmus L.M. , Van Marle-Köster E.
Published: January 2025

Heat stress has been identified as one of the major challenges for livestock production. Global temperatures are steadily increasing, with South African temperatures increasing at nearly twice the global rate. Of the livestock used for food production, dairy cows are the most sensitive to thermal changes, which have detrimental effects on their health, welfare, and overall productivity. Several abiotic factors that influence the heat load experienced by the cow are not commonly included in thermal indices used to measure heat stress; these include solar radiation, wind speed, and soil quality. Furthermore, the thermal comfort zone of cows has been altered by years of intense selection for increased milk yield, causing cows to become heat stressed at lower temperatures. Considering the abiotic and biotic factors affecting the cow’s heat load, it can be argued that dairy cows in tropical and subtropical climates are experiencing constant heat stress. In this review, the abiotic and biotic factors influencing the heat load experienced by dairy cows are reviewed, along with the available thermal indices that can be utilised at farm level.
Effects of environmental change on phytoplankton in Kuwait Bay, Arabian Gulf: Emerging Critical Issues
Authors: Durvasula Subba Rao , Chava Nageswara Rao , Saxena Ashlesha
Published: January 2025

Declining fluvial discharge, dust storms, salinity increases to ~44 PSU and anthropogenic activities impact the phytoplankton of Kuwait Bay, located in the hyper-arid desert climate of the north-western Arabian Gulf. Historical trends in phytoplankton dynamics in the bay are reviewed, which include decadal changes in phytoplankton communities and episodic algal blooms. The number of identified dinoflagellate species has increased from 45 to 213 since 1931, with increases in six categories of potentially toxigenic species, of which Gymnodinium catenatum, Karenia papilionacea and Pyrodinium bahamense pose the highest risk. A decline in chlorophyll a between 2002 and 2020, despite available nutrient sources, likely contributed to the decline in Arabian Gulf fisheries. Apart from declining pelagic fish catches, several mass fish mortality events have been reported for mullets, sobaity seabreams and sea cucumbers. Experimental manipulation of offshore Kuwait surface waters (~42 PSU) to salinities of 32, 37, 42 and 50 PSU resulted in phytoplankton bloom proportions in four days at 32 and 37 PSU. The measured trends in key ecosystem variables together with the decline in diatoms to dinoflagellates, and mass mortalities of fish, suggest a rapidly changing structure and functioning of phytoplank- ton communities in Kuwait Bay. Restoration measures are suggested to improve the ecological condition of the bay and surrounding Arabian Gulf, including greater regional collaboration to reduce the flow of brine and waste water nutrients into the Gulf.
Effects of Physical Activity Level on Sleep Quality and Well-Being in Individuals with Diabetes During Covid-19 Pandemic Period
Authors: Amır Rashedı Bonab Masoud , Yıldız Kızkın Zeynep , Özgül Bahar , Üstün Kağan , Hasırcı Yusuf , Kuru Çolak Tuğba
Published: January 2025

Objective: This study was planned to compare the sleep quality and well-being levels of individuals with Diabetes Mellitus (DM) with different levels of physical activity (PA) due to the increased periods of quarantine at home during the COVID-19 pandemic.
Method: 120 individuals with DM with a mean age of 52.4 (8.42) years (53 females, 67 males) were included in the study. All information was gathered through face-to-face interviews. The participants’ PA levels were measured by the International Physical Activity Questionnaire-Short Form (IPAQ-SF), sleep quality by the Pittsburgh Sleep Quality Index (PSQI), and well-being by the Well-Being Questionnaire-22 (WBQ-22).
Results: The participants' levels of PA were “inactive” for 48 (40), “moderate active” for 64 (53.3%), and “high active” for eight (6.7%). Statistically, there was a significant difference between PA levels in terms of PSQI total score and WBQ-22 total score (p
MARKETING RELACIONAL Y CALIDAD DE SERVICIO EN UNA EMPRESA EN UNA DE TRANSPORTES DE SERVICIO DE TAXY EN LA CIUDAD DE AYACUCHO
Authors: Ccoyllo Quispe Lisseth Wendy , Mosqueira Rodríguez Guisella Balbina , Paz Muro Edgard Stalin
Published: January 2025

El presente artículo tiene como fin determinar la asociación entre el marketing relacional y la calidad de servicio en una empresa de transportes de servicio de taxi de la ciudad de Ayacucho. El estudio es de tipo aplicada, de diseño no experimental, descriptivo, correlacional y cortetransversal. Se aplicó la técnica de encuesta y los instrumentos fueron dos cuestionarios; el modelo RM (Relationship Marketing) y el modelo SERVQUAL, los cuales fueron administrados a 315 usuarios.Se determinó que existe asociación entre las variables marketing relacional la calidad de servicio, con un p-valor de 0.033 (<0.05), siendo de baja intensidad debido a que el indicador V de Cramer = 0.148, por lo que se aceptó la hipótesis alterna de la investigación:existe asociación entre el marketing relacional con la calidad de servicio en una empresa de transportes de servicio de taxi de la ciudad de Ayacucho y se rechazó la hipótesis nula.
Correlación entre la calidad de sueño y actividad de la enfermedad en pacientes con Espondiloartritis.
Authors: Zúñiga-Vera Andrés , Quiñonez-Caicedo Jairo , Martínez-Pérez José
Published: January 2025

bjetivo: Evaluar la relación entre la calidad de sueño y la actividad de la enfermedad en pacientes con Espondiloartritis (EspA).

Metodología: Estudio observacional, transversal, realizado en pacientes de 18 a 65 años de edad con diagnóstico de EspA. Se usó el cuestionario Pittsburgh Sleep Quality Index (PSQI) para medir calidad de sueño, y los instrumentos Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Ankylosing Spondylitis Disease Activity Score (ASDAS-CRP), Disease Activity in PSoriatic Arthritis (DAPSA) para evaluar actividad de la enfermedad.

Resultados: Se evaluaron 72 con EspA. La mediana total de edad fue 42 (IQ 33.75 - 56.25), la media de calidad de sueño medido por PSQI fue 9.15 ± 4.11. En el cuestionario PSQI, los puntajes de mayor frecuencia fueron 8 y 9 (10 sujetos cada uno), seguido de la puntuación 10, presente en 9 individuos. Se encontraron 59 pacientes con EspA y pobre calidad de sueño (puntaje PSQI>5). Se observó asociación significativa para calidad de sueño medido por PSQI, y actividad de la enfermedad evaluada por BASDAI (r 0.530; P<0.001), ASDAS-CRP (r 0.533; P<0.001), DAPSA (r 0.368; P=0.002), VGP (r 0.478; P<0.001), VGM (r 0.382; P=0.001), EVA (r 0.522; P<0.001), SJC/66 (r 0.286; P=0.019), VSG (r -0.363; P=0.021). Se observó asociación entre el uso de antidepresivos y gabapentinoides con la calidad sueño por PSQI, mostrando r 0.30; P=0.005, y r 0.25; P=0.029, respectivamente.

Conclusión: En pacientes con EspA, la pobre calidad de sueño, es un factor independiente de mayor actividad de la enfermedad
Enfermedad de Vogt-Koyanagi-Harada, revisión de literatura: Una entidad infrecuente con tratamiento efectivo.
Authors: Jelves Guido , Carreño Félix , Montecino Lorena , Vidal Álvaro , Gutiérrez Martín , Stevenson Ricardo
Published: January 2025

Introducción: La enfermedad de Vogt-Koyanagi-Harada (VKH) es una enfermedad sistémica inflamatoria poco frecuente de etiología autoinmune. Puede presentar manifestaciones tanto neurológicas, auditivas, dermatológicas y oftalmológicas, tiene una evolución clínica natural bien establecida con variaciones entre los distintos estados, lo que constituye un desafío diagnóstico en la práctica clínica.

Desarrollo: Se realizó una búsqueda de literatura acerca de la enfermedad de Vogt-Koyanagi-Harada en bases de datos PubMed y Scopus disponible hasta Julio 2023, con los términos MeSH "Vogt-Koyanagi-Harada disease," "Uveitis," "UveitisMeningitis Syndrome," "Aseptic meningitis."

Conclusiones: La enfermedad de Vogt-Koyanagi-Harada es considerada una condición infrecuente y multifacética, lo que constituye un desafío diagnóstico. Existe evidencia que apoya un mecanismo de autoinmunidad mediada por linfocitos T contra antígenos de melanocitos, el mecanismo gatillante aún es incierto. El diagnóstico de esta enfermedad es clínico, asociado a exámenes imagenológicos y de laboratorio complementarios, es necesario conformar mejores criterios diagnósticos para lograr un diagnóstico y tratamiento temprano, orientado a obtener mejores resultados clínicos para los pacientes con esta enfermedad.
Suat Engüllü’nün Makedonya Türk Edebiyatındaki Yeri ve Önemi
Authors: Gürel Zeki
Published: January 2025

Türk asıllı, Kuzey Makedonya doğumlu Türkiye Cumhuriyeti vatandaşı, şair, yazar, çevirmen, gazeteci ve edebiyat araştırmacısı Suat Engüllü, 1950 yılında Üsküp’te doğdu. 8 Ekim 2023’te İstanbul’da vefat etti. 1989 yılında Türkiye’ye göç eden Suat Engüllü, İstanbul’a yerleşti ve İstanbul Üniversitesi’nde çalıştı. Sırpça, Hırvatça ve Makedoncadan Türkçeye, Türkçe-den Makedoncaya çeviri çalışmalarından dolayı çeviri ödülleri, sanat çalışmalarından dolayı da şiir dalında ödülleri bulunan Suat Engüllü, Türk edebiyatının Yugoslavya’nın diğer halkları tarafından tanınmasına vesile olmuştur. Makedonya’da yaşayanlar için veya Makedonca öğretecek-öğrenecek olanlar için önemli bir ihtiyaç olan Makedonca-Türkçe sözlük çalışmalarını ise tamamlayamadan vefat etmiştir. Şiir, tiyatro, hikâye türlerinde yayınlanmış pek çok eseri bulunan Suat Engüllü, Yugoslavya Türk Edebiyatını, Yugoslavya’nın kuruluşundan (1944) itibaren başlatmanın yanlış olduğunu savunmuştur. Suat Engüllü, Türkiye Dışındaki Türk Edebiyatları Antolojisi’nin “Makedonya Yugoslavya (Kosova) Türk Edebiyatı” bölümünü de bu bakış açısıyla yazmıştır. Söz konusu antolojinin, bu alanda daha önce yayımlanan antolojilerden farklı bir başka tarafı da önceki antolojilerde dinî kimliklerinden dolayı eserlerine yer verilmeyen şairlerin eserlerine de yer vermiş olmasıdır.
Türkçede “Karadağlıca” Dil Adının Kullanılışına Dair
Authors: Yıldız Cemre Sena
Published: January 2025

Karadağlıca; Balkan coğrafyasında konuşulan, Karadağ'da resmî dil statüsüne sahip olmuş, iki adet yazı sistemi, iki adet ağız sahası bulunan Güney Slav dilidir. Türkçenin Balkan coğrafyasındaki komşularından biri olmasına rağmen Türkçe konuşurları tarafından daha az duyulan ve bilinen dillerdendir. Bunun sebebi, konuşur sayısının diğer dillere göre az olmasına bağlanabilir. Türkçede bu dilin ismi, dili konuşan etnik kökene (Karadağlı) getirilen {+CA} ekiyle kurulmuştur. Ancak Türkçe yazılan akademik kaynaklarda bu dilin “Karadağlıca” olan adının yanında farklı şekillere de rastlanmıştır. Yayınlardaki örnekler sunularak durum ortaya konmuştur. Bu çalışmada öncelikle ana hatlarıyla Karadağ’a, Karadağlılara ve Karadağlıcaya dair genel bilgiler aktarılmıştır. Ardından Karadağlıların dillerini nasıl adlandırdıkları ve başka dillerde bu dilin nasıl adlandırıldığı açıklanmıştır. Çalışmanın öne sürdükleri arasında, Türkçede yeni kullanıma giren veya yaygınlaşan dil adlarında {+CA} yapım ekinin ülke veya coğrafya adına değil, o dili konuşan etnik ada getirilmesi gerektiğidir. Türkçenin dil adı düzeni millet, kavim, halk adlarına {+CA} ekini veya “dili” sözüyle kurulur. Ülke adına doğrudan ek getirerek yapılan adlandırmalar hatalı kullanılan adlar olarak yanlış anlamalara yol açabilir. O ülke veya coğrafyadaki diğer dilleri kapsam dışı bırakarak çok dilliliği ihlal edebilir ve Türkçenin dil adlandırma yaklaşımıyla da çelişir. Çalışma bu görüşten hareketle, yanlış kullanımların önüne geçmek ve henüz yaygınlaşmadan hatalı şekilden kaçınmak gerektiğini vurgulamıştır
Síndrome del indio perdido en la población Yekwana Sadojan Ajo
Authors: Hernández Brito Wilfredo José , Hernández Somoza José  Manuel
Published: January 2025

Se presentan algunos aportes para la construcción y definición de un concepto de Síndrome del Indio Perdido, hallazgo fundamental de mi tesis Doctoral, muy relacionado con el concepto de ladinización en la región Centroamericana. Todo ello es producto de procesos antropológicos de asimilación, exclusión, transculturación y reducción de grupos humanos, desde la época de la conquista por los europeos  hasta nuestros días. Esta investigación servirá en las regiones donde coexisten población autóctona y criolla o extranjera, para diseñar estrategias para la preservación de la salud emocional y mental, salvar las comunidades ancestrales sobrevivientes y rescatar el patrimonio cultural que representan esos pueblos para sus comunidades y el mundo.
Cancer Disease Identification and Recommendation Using Hybrid Deep Learning Algorithms
Authors: E Loganathan  , P Naveenkumar  , C Santhosh  , P Shankareshwaran
Published: January 2025

It presents an automated system for cancer identification and classification using MATLAB, focusing on three types of cancer: brain tumour, skin cancer, and lung cancer. The system leverages advanced image processing techniques for cancer detection, feature extraction, and image segmentation to isolate cancerous regions in medical images. The core of the system is a Convolutional Neural Network (CNN), which is trained to predict the presence of cancer based on the extracted features. Feature selection methods are applied to reduce the complexity of the data, ensuring the CNN focuses on the most relevant characteristics of the suspected cancerous regions. The classification output not only confirms the presence of cancer but also distinguishes between different types of cancer, such as brain tumours, skin cancer, or lung cancer. Upon successful classification, the system provides medical recommendations, guiding clinicians toward appropriate next steps in diagnosis or treatment. This project aims to enhance cancer detection accuracy and efficiency, providing a non-invasive, automated solution to assist healthcare professionals in making informed decisions, potentially leading to earlier interventions and better patient care outcomes.
Analisis Pembelajaran Berdiferensiasi Dalam Kurikulum Merdeka di Sekolah Dasar
Authors: Anggelina Hapsary  , Elysia Anjani  , Vina Maryati
Published: January 2025

Pemerintah menetapkan kurikulum merdeka sebagai kurikulum baru di Indonesia pada tahun 2022. Kurikulum merdeka ini diharapkan dapat memperbaiki sistem pembelajaran di Indonesia dari sekolah dasar sampai perguruan tinggi. Kurikulum Merdeka merupakan kurikulum yang hadir untuk memenuhi kebutuhan siswa melalui pembelajaran berdiferensiasi. Pembelajaran berdiferensiasi menempatkan siswa sebagai pusat pembelajaran dan mengakomodasi kebutuhan belajar siswa yang berbeda-beda. Dalam diferensiasinya terdapat 4 aspek namun untuk proses pembelajaran aspek konten dan proses sangat penting dan selalu berkaitan, maka penelitian ini fokus pada kedua aspek tersebut dalam pembelajaran IPA di sekolah dasar. Bertujuan untuk mengetahui dan memahami aspek konten dan proses yang diperlukan dalam proses pembelajaran IPA di sekolah dasar. Hasil dari penelitian ini adalah guru dapat menyesuaikan materi dan metode pembelajaran dengan mempertimbangkan kesiapan, minat serta profil belajar siswa untuk meningkatkan pemahaman dan keterlibatan siswa sehingga pembelajaran IPA di sekolah dasar akan lebih kontekstual dan relevan dengan kehidupan sehari-hari. Metode penelitian yang digunakan yaitu System Literature Review (SLR).
Staff development programmes and library services delivery in university libraries in Delta and Edo States
Authors: Etchie Victor , Ogbomo Esoswo Francisca
Published: January 2025

The research explored staff development programmes and the provision of library services in university libraries across Delta and Edo states. It was guided by four research questions and one hypothesis. Correlational research design was adopted, with a population of 167 librarians from university libraries in Delta and Edo States. The research instrument utilised is a questionnaire entitled "Staff Development Programme and Library Services Delivery Questionnaire (SDPLSDQ)". The data were analysed with frequency, mean, and standard deviation, with a criterion mean set at 2.50. The hypothesis was tested using Pearson’s Product Moment Correlation (PPMC) at the 0.05 level of significance. The findings revealed a high level of participation by librarians in staff development programmes within university libraries in Delta and Edo States. The extent of library services delivered in these libraries is also high. Additionally, there is a very strong positive relationship between librarians' attendance at staff development programmes and the quality of library service delivery. The study concluded that the active participation of librarians in staff development programmes significantly enhances the quality of library services in university libraries in Delta and Edo States. It was recommended that university libraries should continue to offer and diversify staff development programmes, including induction, professional education, workshops, and online courses. This will ensure that librarians remain current with trends and technologies in the field.
PENGARUH METODE STORYTELLING UNTUK MENINGKATKAN KETERAMPILAN BERBICARA SISWA KELAS X SMK NEGERI 1 LUBUK PAKAM
Authors: Hidayah Tiara , Arianto Arianto , Muliatik Sri
Published: January 2025

This research aims to determine the effect of the storytelling method in improving the speaking skills of class X students at SMK Negeri 1 Lubuk Pakam. This study involved a random sample of 32 students in the control group and 34 students in the experimental group. The two group pre-test and post-test model was used as the experimental design in this research. Performance tests are used to obtain data. The results of the analysis show that in the control class, the average pre-test score is 58.76, the average post-test score is 61.78, and the standard deviation is 57.96 and 5.73 respectively. In the experimental class, the average pre-test score was 66.88, the average post-test score was 86.93, and the standard deviations were 65.96 and 3.26, respectively. The normality test L_count in the normality test is smaller than L_table (0.2562 < 0.2580) and F_table is smaller than F_table in the homogeneity test, so that the post-test data in both groups is considered normal and homogeneous. With 66 degrees of freedom (n1 + n2 – 2), hypothesis testing is carried out at a significance level of ɑ = 0.05. The null hypothesis (H0) is rejected, and the alternative hypothesis (Ha) is accepted, because the t_table value is 2.032 and the calculated t_value is 2.933. This proves that there is a significant influence of the storytelling method in improving students' speaking skills.
THE EFFECTIVENESS OF USING THE DUOLINGGO APPLICATION IN IMPROVING STUDENTS’ MOTIVATION AND ENGLISH-SPEAKING SKILL AT UNIVERSITAS POTENSI UTAMA MEDAN
Authors: Amaniarsih Dwi Suci , Asrul Nurmahyuni , Juliana Juliana , Ginting Erwin
Published: January 2025

This study aims to improve students' motivation and English-speaking skills by using the Duolingo application. The type of research applied in this study is a quasi-experimental method research type with a one group pre-test-post-test design approach, namely experimental research carried out on only one group, namely the experimental group without a comparison group or control group. The study was conducted on students of the English Study Program, Universitas Potensi Utama Medan, Semester I TA. 2024/2025, totaling 30 people. Based on the research results, it shows that the application Duolingo as a learning medium has been proven to be effective in improving students' English-speaking skills and increasing students' interest and motivation in participating in learning. It can be seen from the results of the percentage that has increased after the Duolingo application was implemented as a learning medium. In the pretest activity, the percentage of student completion scores only reached 30%, and student responses during the learning process were categorized as lacking, meaning that students seemed less motivated to participate in learning activities. While in the posttest activity there was a significant increase where there were 74% of students who experienced completion in learning to speak English and student responses during the learning process were categorized as good. This means that student interest and motivation in participating in learning have increased
PENINGKATAN HASIL BELAJAR PENJUMLAHAN MATEMATIKA SISWA KELAS I SDN 04 SERENGSENG TIPE STAD
Authors: Rosfiani Okta , Sabila Salsa , Ernawan Reyhan Fachrezy , Fajar Muhamad , Hafizah Hafizah , Syafi Muhammad
Published: January 2025

This study discusses the application of the Student Teams Achievement Division (STAD) type cooperative learning model to improve the mathematical addition ability of grade 1 students of SDN 04 Serengseng. The STAD model is designed to encourage cooperation between students in small, heterogeneous groups. The learning process begins with the delivery of material by the teacher, followed by group discussion activities where students share their understanding with each other and solve addition problems together. Each student in the group has a role and responsibility to contribute to the success of their team. Teachers act as facilitators who monitor the learning process, provide direction, and ensure the active involvement of all students. In the final stage, students take individual quizzes to assess their understanding, and awards are given to groups that show significant progress. This approach focuses not only on academic outcomes, but also on developing social skills, such as the ability to communicate, collaborate, and appreciate the opinions of others. The STAD learning model is expected to create a fun learning atmosphere, increase students' motivation, and help them understand the concept of addition better. With structured learning, students can strengthen their maths skills while building positive social relationships in the learning environment.