bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects Of Wing Elasticity On Tip Vortex: 3D Deformation And 2D3C Flow Field Measurements
Authors: Guo Qinfeng , Wang Jinjun
Published: July 2024

As aircraft embrace broader applications, the flexible wing presents a promising avenue to enhance aircraft performance across a wide range of flight conditions. Although the aerodynamic benefits of wing deformation are widely recognized, the present understanding of the tip vortex is relatively limited. This work experimentally examines the effects of wing deformation on the tip vortex of a simplified aircraft model with two kinds of elastic wings and a rigid wing. The 3D deformations and 2D3C flow fields are measured using a synchronous measurement system, which includes the high accuracy deformation measurement (HADM) method and the stereoscopic particle image velocimetry (SPIV). It is shown that increased wing elasticity leads to greater bending, with the wing tip moving along the streamwise, vertically upward, and spanwise inward directions. These deformations are closely linked to aerodynamic forces and influence the tip vortex positions. The more elastic wing, EW2, exhibits the highest vortex core position, more than 0.5 times the length of the wing root, while the other one, EW1, shows the strongest vortex in the lift-increased regime. In the early wakes, the tip vortex of the elastic wing is elongated along the spanwise direction, resulting in an asymmetric shape. As it convects downstream, the vortex core disperses via viscous diffusion, resulting in a relatively more circular shape with decreased vorticity.
An Appraisal Of Large-Scale Particle Tracking With Uncrewed Aerial Vehicles
Authors: Leister Robin , Rival David E.
Published: July 2024

Camera technology is rapidly enhancing within the last years, which led to the availability of sophisticated technical features within consumer cameras, that could only be found in scientific set-ups earlier. The present work explores the possibilities of utilizing the potentials of commercially-available camera drones as moving cameras for large-scale particle tracking velocimetry. We made use of the glare-point particle tracking approach introduced by Kaiser & Rival (2023), where only a single camera and natural illumination, e.g. the sun, could be used. The set-up demonstrated full suitability for large volumes in the order of 10-100 m³. The frame-to-frame camera movement, caused by the slight movement of the drone could be quantified and corrected by an imaged-based approach. The calibration strategy could be simplified due to the fixed set-up in the camera drone. The limits introduced through the tracer size and uncertainty caused by the glare-point approach are discussed accordingly. For the presented magnification and camera set-up given by the DJI Mini 3 pro, the limit in height can be determined when the two most dominant glare points collapse to one, which happened well above 10 m for the present set-up. The equipment together with the glare-point particle tracking approach is best suited for flow information extraction at large-scale facilities or difficult accessible terrain, where the current set-up could depict its strengths.
Visualization Of Nanoparticle Orientation Structures Inside Complex Fluids Using Polarized Light Imaging Technique
Authors: Worby William Kai Alexander , Yokoyama Yuto , Kawaguchi Misa , Kusuno Hiroaki , Tagawa Yoshiyuki
Published: July 2024

The present paper reports on the effect of 3D-oriented particles on birefringence using the concept of 'rheooptics', a technique for identifying changes in the internal structure or flow dynamics of complex fluids from changes in optical anisotropy (birefringence). We used the photoelastic method, as a kind of polarized light imaging technique, to visualize the internal orientation structure induced by applying shear stress to cellulose nanocrystal (CNC) suspensions under shear flow. Two different rheometers (concentric cylinder and parallel plate-type) that can easily combine a birefringence measurement system were introduced to Transverse rotation Longitudinal rotation perform the shear flow induction, and the birefringence was measured and compared from vertical and horizontal directions for shear. The birefringence measurements from different directions provide an opportunity to investigate the effect of 3D-oriented CNCs on birefringence, which is a novelty of the present study. The measured birefringence was fitted with the empirical equation proposed in the previous study and followed the power law of applied shear rate with the same exponent, independent of the shear direction at the time of measurement This result suggests that there is a common physical background that gives birefringence a power law. This exponent was different from the values given in previous studies and is explained by differences in the particle interaction behaviour based on the concentration of suspensions and CNC length. Note that the proportionality coefficients differ by a factor of 10, clearly indicating differences due to the direction of birefringence measurement. These results indicate that birefringence due to transverse rotation of the CNC is more sensitive to shear stress than to longitudinal rotation.
Experimental Study On Pressure-Velocity Relation Of Near-Field Tip Vortex Using Tomographic PIV
Authors: Zhao Hang , She Wenxuan , Gao Qi , Shao Xueming
Published: July 2024

The non-cavitating tip vortex in the near field of an elliptical hydrofoil is studied using tomographic particle image velocimetry (TPIV). By investigating the distributions of the axial velocity difference and streamwise vorticity, the formation and development of the near-field tip vortex are clearly revealed. In the near field, the axial flow within the tip vortex manifests a jet-like profile, and the majority of the vorticity is contained within the vortex core. A special position is identified during the streamwise evolution of the tip vortex, where the vortex core circulation reaches its local maximum for the first time and tip vortex cavitation (TVC) might be more prone to incept. In the vicinity of this crucial position, a concise relation between the static pressure along the tip vortex center line and the local velocity is derived by combining the three-dimensional measured velocity fields with the governing equations. Based on the Reynolds-averaged Navier-Stokes equation, it is revealed that the mean static pressure along the vortex center line is directly related to the local mean axial velocity, whereas the local velocity fluctuation has little impact on the mean static pressure. It is the first attempt to combine the three-dimensional measurement with the governing equations to investigate the near-field tip vortex flow, which might provide valuable insights for understanding and predicting tip vortex cavitation inception.
Development And Application Of A New Visualization Technique Using Photochromism For Transport Process Of Lubricating Oil Around The Engine Piston
Authors: Azetsu Akihiko , Ochiai Masayuki
Published: July 2024

A new visualization technique using photochromism for the movement of oil film was developed and applied to an optical gasoline engine. A photochromic dye was dissolved in the oil and an arbitrary position of the oil film was illuminated by UV laser light, which makes a marker in the oil film via a photochromic reaction. The lifetime of color change by photochromism is relatively long and therefore, by tracking the movement of a marker makes it possible to visualize the movement of oil film directly. The color density was quantified based on the absorbance calculated from images taken before and after coloring in two wavelengths. Through the experimental and theoretical considerations, it was confirmed that the calculated absorbance is effective in reducing a noise originated by the color, the shape of the piston surface, the temporal variation of oil film thickness and the illuminating light intensity distribution. Furthermore, the value of the absorbance is in a very good linear relationship with the oil film thickness.
This technique was applied to an optical gasoline engine and confirmed the availability of this technique. In the top land of piston surface, the oil film between the piston and cylinder liner was separated and the majority of the oil is at the piston surface and moved with the piston motion. The oil film thickness on the cylinder liner was very thin. On the contrary, at the piston skirt region, a wider region of the oil film is connected between the linear and the piston skirt. However, there are regions where the oil film between the liner and the skirt is separated by cavitation and the majority of the oil film is on the piston skirt. The change of the flow direction by the operating condition, i.e., the throttle condition, was able to clearly visualize, though the movement of oil film on the piston surface was very slow in normal case. The relatively fast complexed flow for opposite direction was also able to visualize by this technique.
Rayleigh-Bénard Convection In Molten Salt At Elevated Temperatures
Authors: Calmbach Jasmin , Li Panxin , Naumann Clemens , Käufer Theo , Resagk Christian , Karcher Christian , Cierpka Christian
Published: July 2024

The velocity field of turbulent Rayleigh-Bénard convection is analyzed by means of 2D2C particle image velocimetry (PIV). In order to investigate the influence of thermal radiation to the global heat flux hot molten salt with temperatures between 160 °C and 250 °C is used as working fluid. We report on the construction of the convection cell, the application of the PIV measurement technique and show first results of the velocity fields at two different Rayleigh numbers Ra = 1.7 x 10^7 and Ra = 1.3 x 10^8 .
Reynolds Number Independence In An Urban Street Canyon Using 3D Robotic Particle Tracking Velocimetry
Authors: Dsouza Brian , Sciacchitano Andrea , Yu W
Published: July 2024

The Reynolds number in an Urban Street Canyon is a difficult parameter to match between reduced-scale experiments and full-scale measurements. It is possible to overcome this mismatch in Reynolds numbers by satisfying the Reynolds number independence criterion, which states that above a certain critical Reynolds number, the flow field remains invariant with increasing Reynolds numbers. For an urban canyon with an aspect ratio 1, this critical Reynolds number is often reported to be 12000 for the mean flow quantities. This critical Reynolds number, however, is not applicable for higher-order quantities such as turbulence intensity and Reynolds stresses. In this study, 3D robotic particle tracking velocimetry was used to study the flow in an urban street canyon with an aspect ratio of 1 at several Reynolds numbers to estimate the critical Reynolds number for mean flow quantities and turbulence quantities. It was found that the critical Reynolds number for mean flow quantities was between Re = 13000 and Re = 17000. For the higher-order quantities, it was found that the critical Reynolds number was above 22000.
PIV And Schlieren Measurements Of A Linear Plug Nozzle Jet Interacting With External Flow
Authors: Wißmann Paul , Kähler Christian J. , Scharnowski Sven
Published: July 2024

Plug nozzles represent a promising concept as part of a propulsion system for space launchers. The ability to adapt the nozzle jet to the ambient pressure level improves thrust performance in overexpanded operating conditions compared to conventional bell nozzles. In this study, the dynamics of a jet flow of a cold air plug nozzle model are investigated by means of PIV and high-speed schlieren measurements. For a fixed nozzle pressure ratio, the jet flow is studied in an externalouter flow environment with sub-, trans-, and supersonic Mach numbers. The effect of plug truncation is analyzed as well. It is found that the outer Mach number strongly influences the flow pattern, local velocity magnitudes and aerodynamic modes. The frequency and dominance of vortex shedding and jet screeching modes are found to be highly dependent on the Mach number of the surrounding flow. A truncated plug introduces local accelerations in its base wake region, causing an increased shock strength in the jet structure. In addition,it causes severe periodic fluctuations in the flow that are transmitted to the shear layer and induce acoustic wave emissions. The impact of the plug length on the flow dynamics has been seen to decrease with increasing outer Mach number.
Revisit Liu & Katz (2006) And Zigunov & Charonko (2024): On The Equivalency Of Omni-Directional Integration And Pressure Poisson Equation
Authors: Pryce Connor , Li Lanyu , Pan Zhao
Published: July 2024

In this paper we demonstrate the equivalency of Omni-Directional Integration (ODI) and the Pressure Poisson Equation (PPE) for pressure field reconstruction from corrupted image velocimetry data. Over the years, it has been long debated which of the two families of methods is better for pressure reconstruction, direct pressure gradient integration (particularly ODI) versus PPE. Some have claimed that ODI is fundamentally different, and far more accurate than PPE; while other studies observed similar reconstruction accuracy between ODI and PPE (McClure & Yarusevych, 2017). This debate has been filled with confusion and conflicting results until a recent breakthrough by Zigunov & Charonko (2023, 2024) while trying to improve the computational efficiency of ODI. In a series of works, Zigunov & Charonko (2023, 2024) reformulated the iterative integration process of ODI into a system of linear equations resembling the discretized PPE, alluding to a deep connection between ODI and PPE. With careful numerical treatment, we show that ODI can be viewed as pursuing the minimal norm solution to a Poisson equation with pure Neumann boundary conditions. We provide a detailed and physical explanation for why some have reported poor robustness of the PPE, highlighting critical nuances in its numerical implementation, and explain why the ODI is more robust to random noise in the data. We hope to put an end to the PPE versus ODI debate and clear up the confusion surrounding how these and when these methods perform well. With these new comprehensions, we can leverage the established regularization techniques and efficient numerical algorithms of elliptic equations to improve PPE/ODI-based pressure field reconstruction.
A facility for PIV measurements of water hammer in pipe flow
Authors: Oldenziel Gosse , Clemens Francois
Published: July 2024

We present a facility for measurements of transient flow behavior due to rapid valve closure at initial Reynolds numbers up to Re τ = 1237. The facility allows the deployment of non-intrusive laser based diagnostic techniques such as Particle Image Velocimetry, Stereo Particle Image Velocimetry and Laser Doppler Anemometry. Steady state planar PIV and pressure drop measurements have been performed as well as planar PIV and absolute pressure measurements of the flow following rapid valve closure. The steady state measurements indicate that a clear logarithmic layer is present for the measured conditions at Re τ > 344 with a von-Kármán constant of k = 0.40. Resulting velocity and vorticity fields for an example transient case show the rich flow physics, including generation and advection of vorticity.
Robot-LDA Plane Measurements And Smoke Investigations On A 30° Inclined Flat Plate In An Open Wind Channel With And Without Plasma Actuation Effect
Authors: Berger Manuel , Wilhelm Martin , Güntner Leonhard , Mayerl Christian , Kofler Tobias , Senfter Thomas , Zingerle Lukas , Pillei Martin
Published: July 2024

Active ﬂow control is a relatively new approach to inﬂuence the velocity vector ﬁeld for plane airfoils or process engineering applications with a plasma source. The goal is to positively effect the point of separation to increase the lift/drag ratio or increase separation efﬁciency and to reduce pressure drop. In the presented study two approaches, the Robot-LDA measurements and smoke investigations, are chosen to ﬁnd out whether the plasma source has an effect on the velocity vector ﬁeld on a 30°inclined ﬂat plate and the separation point. A ﬂow rate of 250 m³/h resulting in a Reynolds number of 100 000 is chosen, since this is typical for already presented results within the ﬁeld of plasma source investigations. With Robot-LDA in total 825 measurements points of the axial wind channel velocity components are captured twice, with and without activated plasma source. The measurement plane was set 80 mm x 50 mm orthogonal to the ﬂat plate in the middle of the wind channel axis. The plasma source was powered with 14 kVp−p and 5 kHz. Due to stability of the plasma actuator, the LDA measurements were subdivided into eight regions. For the same conﬁgurations smoke investigations are performed. A chromium-nickel wire with a diameter of 0.213 mm is heated by an electronic circuit including capacitor and power source to vaporize liquid parafﬁn. The ﬂow ﬁeld is captured by a highspeed camera. Robot-LDA measurement results show a free-stream axial wind channel velocity component of about 15 m/s. In the shadow region of the 30°inclined ﬂat plate a recirculation zone is found due to negative velocity components. At a distance up to 12 mm close to the plat plate, wall reﬂections dominated and to ﬁnd valid LDA measurement results were not possible. With and without activated plasma source velocity differences between -0.5 m/s and 0.5 m/s are found. The biggest velocity differences are in the region of 15 mm to 45 mm relative to the tip of the inclined ﬂat plate. For post-processing purposes, the 3D wind channel geometry and the Robot-LDA measurement results are loaded in ParaView 5.10.1. Smoke investigations show that the plasma source minimally attach the ﬂow to the ﬂat plate. This effect is higher with smaller ﬂow rates (50 m³/h) than with 250 m³/h. Robot-LDA and smoke measurement results are promising that ﬂow inﬂuence due to plasma has potential in various applications in future.
High Gain DC-DC Converter for Photovoltaic System
Authors: Thilothama P. ,   Department of Electrical and Electronics Engineering, Government College of Engineering, Salem-11,  Tamil Nadu, India, Ashokaraju D.
Published: July 2024

The, high-gain DC–DC converters dragged much attention among the researchers. But there is a concern that high-gain converters have less efficiency and high switching stresses. The converter topology has two quasi-impedance source network and a voltage multiplier cell unit to facilitate very high-gain output voltage. The input variations due to varying irradiation of photovoltaic are alleviated by employing the perturb and observe maximum power point tracking mechanism. The simulation of the work is realized in MATLAB/ Simulink arena, and hardware circuits are validated using the dsPIC30F2010 controller. Key Words: High-gain DC–DC converter, non-linear carrier controller, voltage regulation, perturb and observe maximum power point tracking, solar photovoltaic
FEA-Based Analysis of Front Control Lower Arm in Automotive Suspension
Authors: Borase Pradip Diwan , Babele Vivek , Khare Girish Kumar
Published: July 2024

The front control lower arm (LCA) is a pivotal component in an automotive suspension system, responsible for maintaining vehicle stability, handling, and overall comfort. This study delves into the structural integrity and performance of the LCA using advanced Computer-Aided Design (CAD) modeling and comprehensive Finite Element Analysis (FEA). The CAD model was meticulously developed in Creo and exported to ANSYS for detailed simulation. The FEA results revealed significant insights into the stress distribution, deformation patterns, and fatigue life of the control arm under realistic operational conditions. The analysis identified high-stress concentrations near the top mounting point, marking these regions as critical areas that necessitate design modifications to prevent potential failures. Specifically, the maximum equivalent (von-Mises) stress observed was 208.89 MPa, which is near the material's yield strength, indicating a high likelihood of structural failure under prolonged stress. Additionally, the maximum total deformation was found to be 0.4218 mm, occurring at the same critical regions as the high-stress concentrations. This deformation pattern was smooth and well- distributed, suggesting a structurally sound design despite the stress vulnerabilities. Fatigue life predictions showed considerable variability, with the highest life expectancy exceeding 6.3 million cycles and the lowest life around 15,649 cycles in the high-stress areas. This correlation between stress concentration and reduced fatigue life underscores the necessity for targeted design improvements. By enhancing these critical areas, the overall durability and performance of the LCA can be significantly improved. This research provides a detailed methodology for evaluating the LCA's structural performance, offering valuable insights into potential design enhancements. The study’s findings are crucial for automotive engineers and designers aiming to optimize suspension components for better reliability and longevity. The use of CAD modeling and FEA in this context demonstrates the importance of these tools in modern engineering, enabling precise simulations and accurate predictions that guide the design process. Future work will focus on implementing the suggested design modifications and validating their effectiveness through experimental testing and further simulation. Keywords—Lower control arm, automotive suspension, CAD
911 Call Analyzer: A Vital Tool for Detecting Critical Emergencies
Authors: Patil Paresh , Gaikwad Sushant , Hatkangane Akash
Published: July 2024

Emergency response systems must be able to promptly and accurately evaluate emergency calls. We provide a machine learning- based method in this study, called the "911 Call Analyzer," to automate the process of identifying serious crises from 911 call audio recordings. Mel- frequency cepstral coefficients (MFCCs) are used by the system to extract features, and machine learning and deep learning architectures are used for classification. To forecast the urgency and severity of each emergency call, the collected features are fed into a model that has been trained on a dataset of labelled calls. We assess the 911 Call Analyzer's performance using a test dataset, and we obtain a 91% accuracy rate with RF and XG Boost model followed by SVM with 90% accuracy, CNN with 69% accuracy and lastly LSTM with 64% accuracy. These findings show how well the suggested method works to reliably identify important crises, which helps emergency dispatchers prioritize calls and allocate resources more wisely. The 911 Call Analyzer is a tool that holds great potential for improving emergency response systems' efficacy and efficiency, which will eventually benefit those who are in need. Key Words: 911 calls, MFCCs, LSTM, CNN, SVM, RF, XG Boost.
ENHANCING USER PRODUCTIVITY: DEVELOPMENT OF A VOICE-BASED VIRTUAL ASSISTANT
Authors: H R PRAMOD , K T SIDDESH , S M KOTRU SWAMY
Published: July 2024

This work streamlines voice command interactions with devices by integrating NLP and machine learning in Python to create a desktop virtual assistant. It prioritizes safe authentication and economical resource use while converting voice inputs into text for analysis and customized responses. By using cutting-edge voice recognition, the assistant seeks to improve desktop productivity. It continuously adjusts to new developments in voice technology to satisfy changing user demands. Keyword: Virtual Personal Assistant, Artificial Intelligence, Voice Recognition, Python, text to speech.
INNOVATIVE AERIAL IMAGE PROCESSING TECHNIQUES FOR ENHANCED SOIL EROSION DETECTION
Authors: A Nikhil ,   Department of MCA, BIET, DAVANGERE., R Roopa
Published: July 2024

The health of ecosystems, land use, and agriculture are all seriously threatened by soil erosion.This innovative method makes use of sophisticated image processing techniques like contour evaluation, adaptive thresholding, Gaussian blur, and morphological operations to analyze aerial photos. The method increases the accuracy of detecting erosion and identifies susceptible areas in expansive landscapes. This scalable approach offers a potent weapon in the fight against soil degradation and promises to transform ecological monitoring and management. The novel approach represents a significant development in the evaluation of soil erosion andenvironmental preservation. Keyword: Soil Erosion, Aerial Photography, Image Processing, Gaussian Blur.
MODERN THREATS TO THE NATURAL-ECOLOGICAL FRAMEWORK OF THE ARCTIC TERRITORY (ON THE EXAMPLE OF THE KOMI REPUBLIC USINSKY DISTRICT)
Authors: Osadchaya Galina , Churbakov Evgeniy , Bykova Mariya
Published: July 2024

The article defines the elements of the natural and ecological framework (PEC) of the Usinsky district of the Komi Republic. The main types of environmental management are characterized and their impact on the main elements of the PEC is assessed. Quantitative data on the loss of the territories of the PEK due to subsurface use, which is the main threat to its preservation, are presented. The ways of solving the problem of loss of PEC in relation to the Arctic territories of the European Arctic are proposed.
Nutritional Composition of Value-added Fish Products from Selected Fish Species in Kenya
Authors: Githukia Cecilia , Cheserek Maureen , Otieno Dennis , Menach Evans , Kyule-Muendo Domitila , Obiero Kevin , Munguti Jonathan
Published: July 2024

Fish is an important seafood that provides quality nutrients to human beings which is vital for health and development. This is especially critical in the diets of children under two years old and reproductive women (pregnant and lactating). Selected fish species were sampled from both Lake Victoria and fish farms, and their weight was determined using a sensitive weighing balance and fish-based products (powder and gelatin) developed to food-grade standards. The proximate composition of minerals, amino acid, and fatty acid profile were assessed in the laboratory, and data were analyzed using R statistic tool version 4.2.2 to understand the differences between the variables at a significance level of p < 0.05. Results indicated that crude fat ranged from 3-23%, crude protein was highest in Nile perch gelatin at 81.22±1.43 while omena and haplochromine spp. had the highest concentration of calcium at 6347.1±428.5 and 4522.0±233.3 mg/Kg respectively. The highest concentration of essential amino acids was found in omena and Nile perch powder. Among the fatty acids; oleic and palmitic were the dominant fatty acid in the fish products at 25.12±0.56% - 45.12±0.65% and 20.52±0.69% - 44.23±0.74% respectively. The moisture content of the final products was between 4.64 ±0.08% - 8.82±0.35%, which was within limits ensuring little microbial activity thus enhancing the shelf-life of the final products. The developed products had nutrients that are beneficial to human health at desirable concentrations and are recommended for inclusion in the diet of vulnerable groups for a prosperous community free from hunger and malnutrition.
El accionar político y militante de colectivos de músicos/as de rock y de artistas en el conurbano bonaerense. Una mirada etnográfica de la campaña electoral de 2019
Authors: Saponara Spinetta Valeria Lucia
Published: July 2024

En base a los diversos vínculos que el Estado y los/as músicos/as organizados/as de rock han entablado en los últimos años, en este artículo me propongo analizar el accionar colectivo y político que asumieron los/as artistas y músicos/as autogestionados/as de rock de la ciudad de Avellaneda (ubicada en el sur del conurbano bonaerense, Provincia de Buenos Aires, Argentina), durante la campaña electoral de 2019. Hago énfasis, por un lado, en la militancia y el accionar político que asumieron diferentes colectivos, en coordinación con la gestión municipal, en pos de influir en el resultado electoral y, por otro lado, en el posicionamiento y las posturas que los/as propios/as músicos/as y artistas han tomado al respecto. Parto de un enfoque etnográfico, el cual retoma aportes de perspectivas que privilegian la experiencia de campo como fuente de conocimiento. El trabajo de campo, la observación participante y las entrevistas en profundidad a artistas y trabajadores municipales han sido las técnicas elegidas para realizar este trabajo. Con este artículo espero aportar al análisis y reflexión acerca de los nuevos vínculos que emergen entre los/as artistas independientes y/o autogestionados/as y el Estado (haciendo foco, particularmente, en los consensos y las tensiones que conllevan estas articulaciones), y sobre el cruce entre la actividad cultural/artística, la militancia colectiva y el trabajo en y desde el Estado.
Aportes para pensar en urbanismos interespecies
Authors: Perez Pejcic Gonzalo
Published: July 2024

Los espacios urbanos responden a un modelo de sujeto hegemónico que es criticado por distintas corrientes que abogan por ciudades pensadas desde la diversidad humana. Sin embargo, esas objeciones suelen llevarse a cabo sin cuestionar que el primer rasgo de aquel sujeto es su pertenencia a la especie homo sapiens y que, en consecuencia, la cuestión tanto territorial como de la urbe se centra en él. Esto es problemático, ya que convivimos con individuos de diferentes grupos biológicos. A raíz de ello, mi objetivo es plantear la necesidad de un urbanismo crítico, interseccional y no antropocéntrico. Con ese fin, selecciono los cuestionamientos que recibe el modelo tradicional de habitante urbano por parte de las teorías de la discapacidad. Me detendré en el carácter capacitista del prototipo de referencia y las razones antropocéntricas que se emplean para su rechazo. Luego, argumentaré que esos motivos son especistas desde la perspectiva de la ética animal e interactúan con el capacitismo a la luz del enfoque animalista crip. Por último, daré paso al giro político para los derechos de los animales con la intención de exhibir sus implicancias en materia de urbanismo.
1-(4-NITROFENIL)-4-(X-FENOKSIMETIL)-1H-1,2,3-TRIAZOLLAR SINTEZI VA ULARNING BAKTERIYA VA ZAMBURUG‘LARGA QARSHI FAOLLIGI
Authors: Mamajonov Jasurbek Shuxratbekovich , Abdugafurov Ibragimdjan Azizovich , Umizoqov Nurshod Orif o‘g‘li
Published: July 2024

Ushbu maqolada 1H-1,2,3-triazollarning biologik faolliklari to‘g‘risidagi ma’lumotlar, 1-(4-nitrofenil)-4-(X-fenoksimetil)-1H-1,2,3-triazollarning mis tuzlari katalizatorligida samarali sintez usuli keltirilgan. Sintez qilingan moddalarning bakteriya va zamburug‘larga qarshi faolliklari o‘rganilgan. Bakteriya va zamburug‘larga qarshi faollikni namoyon qilgan.
Kırsal Turizmin Kırsal Kalkınmaya Katkısı: Nedenleri ve Etkileri
Authors: Bilge Nihat Sarp
Published: July 2024

Kırsal turizm, kırsal kültür, doğal çevre ve tarımla bütünleşen, ayrıca diğer turizm
türleriyle de kolayca entegre edilebilen bir turizm türüdür. Kırsal turizmin kırsal kalkınmaya etkileri hakkında yapılan literatür taramalarının yanı sıra, Dokuz Eylül Üniversitesi'nden uzmanlarla görüşülerek istişarelerde bulunulmuştur. Turistik faaliyetler ile kırsal kalkınmayı örneklerle incelemek için toplamda 2 ülke, 6 şehir, 9 yerde gözlem çalışmaları sürdürülmüştür. Gözlemler sayesinde farklı coğrafyalardaki turistik kırsal kalkınma konusunda bilgi edinilmiştir. Ayrıca, kırsal turizmin gayrimenkul sektörüne etkisi sayısal veriler ışığında incelenmiştir. Türkiye, dünya genelinde turizmde altıncı sırada yer alsa da kırsal turizm aracılığıyla ülke genelindeki turistik potansiyeli daha dengeli bir şekilde dağıtarak, turizm açısından yaşadığı orantısızlık sorununu çözebilir. Böylece kırsal turizm, Türkiye'nin turizm konusunda da sorunlarını çözerek kırsal kalkınmaya turizm konusunda da katkı sağlamaktadır.
İbn Battuta Seyahatnamesinde Sivas Multan ve Granada Şehirleri
Authors: Ergün Altun Sümeyye , Doğan Umut
Published: July 2024

İbn Battuta (1304-1369) 14. yüzyılın en önemli seyyahlarından birisidir ve seyahatname çağdaşı olan diğer seyahatnamelere göre Mekânsal referansları doğrulanabilir olduğu için tercih edilmiştir. Granada, Marakesh, Cordoba, Sevilla, Sivas, Konya, Şiraz, Multan, Yeni Delhi, Lahore, İstanbul, Viyana, Roma, Kahire ve Bağdat şehirlerinin, 11. yüzyıl ile 15. yüzyıl arasında Altın Çağ olarak nitelendirebileceğimiz bir dönem içerisinde ve dönemin önemli başkentlerinden olduklarını söyleyebiliriz. Bu çalışma, seyahatnamede (Rıhle) yer alan İbni Battuta’nın tabiri ile dönemin başkentlerinden olan Granada, Multan ve Sivas hakkındaki bilgileri incelemek ve yazdığı şehirlerin tasvirleri ve yöneticileri ile ilgili bilgileri derleyerek yeni harita ve görseller oluşturularak 14. yüzyılda ve sonrasında karşılaştığı yağma ve işgallerden dolayı o döneme ait kaynak yetersizliğine ışık tutmak amaçlanmıştır. Dönemim aksine günümüzde başkent olamayan bu şehirler bu nedenle tercih edilmiştir. Çalışmada, literatürde döneme ait mevcut minyatür ve gravürler incelenmiş ve Adobe çizim programlarından yararlanılarak 13. yüzyıla ait haritalardan oluşturulmuş. İbn Battuta, El Hamra’nın yeni yapıldığını söyleyebileceğimiz bir dönemde Granada’yı ziyaret etmiş büyüklüğünden ve refahından bahsetmiştir. Multan için özel vergiler olduğundan büyük ticaret merkezi olduğundan ve Rajaların (vali) saraylarından bahsetmiştir. Sivas’ı ziyaret ettiği zaman şehrin Anadolu Selçuklu ve İlhanlıların ardından Eretna Bey’in himayesinde olduğundan Eretna Bey’in sarayından, şehrin refahından ve misafirperverliğinden bahsetmiştir. Bu bilgilerin ışığında Sonuç olarak 3 şehir için yeni strüktür analizi (şehirlerin analizi) yapılarak 13-14. yüzyılda bu kentlere dair yeni bir şema ortaya konulmaya çalışılmıştır.
Suriye ve Çevresindeki Ermenilerin 1918 Sonrasında Yabancı Ülkelere Göçürülmesi
Authors: Çoruh Haydar
Published: July 2024

Osmanlı Devleti’nin parçalanması esnasında Ermenilerin 1890’larda Doğu Anadolu’da bir Ermeni yurdu kurmak amacıyla başlattıkları isyan ve saldırılar, Birinci Dünya Savaşı’nın başlamasından bir yıl sonra Türkler tarafından mukabele gösterilerek durdurulmak istenmiştir. Ermeniler İngiliz, Fransız ve Rus hamilerine güvenerek 1878 Ayastefanos Anlaşması’nda elde edemedikleri taleplerini gerçekleştirmek için yaklaşık yarım asırlık bir mücadeleye girmenin bedelini, Türk topraklarından Suriye’nin kuzeyine sürülmekle ödeyeceklerdir. Ermenilerin büyük ihanetlerine rağmen Osmanlılar onları cezalandırmak yerine, hayatlarını, canlarını, mallarını ve namuslarını koruyabilecekleri bir fırsat vererek hazırladıkları Sevk ve İskan Yasası ile emniyet içerisinde Kuzey Suriye’ye yerleşmelerine izin vermiş ve bizzat kendi kolluk güçleriyle onları bu yolculukta refakatsiz bırakmamışlardır. Ancak Ermeniler güven içerisinde gittikleri bu toprakardan önce Avrupa ve ABD’ye sığınarak ayrıldıkları yetmezmiş gibi, sonrasında gidenleri kayıp ve yok edilmiş kaydeden patrik ve piskoposlarının ardına düşerek, Osmanlı Devleti’ne karşı büyük bir iftira kampanyası başlatarak sözde Ermeni Soykırımı” yaftasını yakıştırmak istemişlerdi.
Bu makalede, Osmanlı Devleti’nin Sevk ve İskan yasası ile Suriye’nin kuzeyine sürgün ettiği Ermeni ve daha bir çok unsurun sonradan uydurdukları katliam ve soykırım iddialarını, yabancı ülkelere göç eden gayrimüsli nüfusa dikkat çekerek çürütmeye çalışılmıştır.
Field placements during a global pandemic
Authors: Burke Susan , Kyle Lisa , Pierce Joanna , Anatole Rachel
Published: July 2024

This study describes research conducted with Master of Social Work (MSW) students and alumni who completed all or part of their graduate practicum during the height of the COVID-19 pandemic. It arises from observations by the first three authors, who are all faculty in a post-secondary social work program in northern British Columbia. These faculty observed that, despite myriad challenges associated with the COVID-19 pandemic, many graduate students reported benefits from completing a practicum during this time. Semi-structured interviews were conducted with 11 participants, revealing three themes: 1) advantages from flexibility in completing practicum requirements, 2) enhanced connections, and 3) richer learning experiences. This article discusses those themes and their sub-themes, and offers suggestions for how the people involved with post-secondary professional programs can use what was learned from the unprecedented time around the COVID-19 pandemic to inform field education. As people involved in post-secondary professional programs, faculty and staff, university administrators, community organizations and professionals, and accreditation bodies may find this study helpful.
Keywords: Field education, practicum placements, COVID-19, student experiences
Stages pendant une pandémie mondiale : Leçons tirées d'expériences positivesRésumé : Cette étude décrit la recherche menée auprès d'étudiants et d'anciens étudiants en maîtrise en travail social (MSW) qui ont effectué la totalité ou une partie de leur stage d'études supérieures au plus fort de la pandémie de COVID-19. Elle découle d’observations effectuées par les trois premiers auteurs, qui sont tous professeurs dans un programme postsecondaire de travail social dans le nord de la Colombie-Britannique. Ces professeurs ont observé que, malgré la myriade de défis associés à la pandémie de COVID-19, de nombreux étudiants diplômés ont déclaré avoir tiré profit de la réalisation d'un stage pendant cette période. Des entretiens semi-structurés ont été menés avec 11 participants, révélant trois thèmes : 1) les avantages de la flexibilité pour remplir les exigences du stage, 2) l'amélioration des relations et 3) des expériences d'apprentissage plus riches. Cet article aborde ces thèmes et leurs sous-thèmes, et propose des suggestions sur la manière dont les personnes impliquées dans les programmes professionnels post-secondaires peuvent utiliser les enseignements tirés de cette période sans précédent de la pandémie de COVID-19 concernant les formations pratiques. Les personnes impliquées dans les programmes professionnels post-secondaires, le corps enseignant et le personnel, les administrateurs d'université, les organisations et les professionnels de la communauté, ainsi que les organismes d'accréditation, sont susceptibles de tirer profit de cette étude.Mots-clés : Formation sur le terrain, stages pratiques, COVID-19, expériences des étudiants
Un accès payant pour des ressources éducatives en licence Creative Commons : un paradoxe étudié au prisme d’une étude de cas, Faq2Sciences
Authors: Cisel Matthieu , Laudier Nicolas
Published: July 2024

Le projet Faq2Sciences porté par l’Université Numérique Thématique Unisciel représente une banque de plusieurs milliers d’exercices en sciences naturelles, mathématiques et informatiques, alimentée par de nombreuses institutions d’enseignement supérieur. Il s’inscrit dans une logique de mutualisation des ressources éducatives libres (REL) de l’enseignement supérieur français, problématique qui a connu une recrudescence d’intérêt à l’occasion des confinements qui eurent lieu durant la pandémie de COVID-19. A travers une analyse quantitative des métadonnées associées aux exercices menée notamment au prisme de la théorie de l’échange social, nous montrons que prédominent les licences Creative Commons, alors même que l’accès plein et entier à ces ressources implique pour les institutions concernées de s’affranchir d’un abonnement annuel. Nous nous basons sur cette étude de cas pour discuter d’un paradoxe : le développement de ressources pédagogiques sur lesquelles sont apposées des licences de libre diffusion, mais qui n’en demeurent pas moins relativement difficiles d’accès dans la mesure où un paiement est demandé. Loin d’être un cas isolé en France, ce projet révèle certaines des difficultés que rencontrent les institutions qui veulent concilier impératifs économiques et idéaux des licences libres.
 
Faq2Sciences represents an exercise database in natural sciences, mathematics, and computer science; it is designed by a consortium of French institutions of higher education. The mutualization of open educational resources (OER) at a national scale has seen a resurgence of interest during the lockdowns which took place during the COVID-19 pandemic, and discourses promoting open licenses for educational content have gained momentum. However, they are hindered by the fact that such initiatives need to be economically sustainable. In the present article, we use Faq2Sciences to illustrate this contradiction through a quantitative analysis of the metadata associated with the exercises. The fact that public institutions broadcast resources with open licenses, but ask for a fee to provide access to the database due to economic imperatives has become a growing paradox in France. As it hampers the development of a culture of open education, it needs to be addressed by the research community. Through the lens of the social exchange theory, notably, we analyze why content designers favor different types of Creative Commons licenses, while at the same time the overarching institution, Unisciel, requires a subscription to access the content.
Staff Emolument, Job Security and Employee Commitment: A Correlational Analysis of Multinational Oil Companies in South-South, Nigeria
Authors: Tuoyo Akpokiniovo-Uwawah Felicia ,   Department of Business Administration, Delta State University, Abraka, Nigeria, Odiri Dr. V.I.O. , Aruoren Dr. E.E. ,   Department of Business Administration, Delta State University, Abraka, Nigeria,   Department of Business Administration, Delta State University, Abraka, Nigeria
Published: July 2024

Multinational oil companiеs, whosе goals arе basically oil еxploration, thеir succеss could bе dirеctly tracеd to thе quality of staff, and thе commitmеnt of such staff are basеd on thе working conditions that motivatе thеm. One of such condition is employee emolument and job security. Thus, this paper investigated how emolument and job security correlate employee commitment in multinational oil companies in South-South, Nigeria. Two hypotheses were tested in the study. Thе study еmployеd thе еx-post facto descriptive survey design sampling thе opinions of 482 participants within thе jurisdiction of thе study. Thе instrument used was thе questionnaire titled Staff Emolument, Job Security and Employee Commitment Questionnaire (SEJSECQ). Thе data analysis еmployеd thе use of dеscriptivе statistics with thе statistical packagе of thе social sciеncеs version 23 (SPSS 23). Thе stated hypothеsеs wеrе tеstеd using thе Pearson Product Moment Correlation (PPMC) of significance with thе same software. It was found in thе study that was a positivе significant rеlationship bеtwееn staff еmolumеnt, tеrms of еmploymеnt (job sеcurity), and staff lеvеl of commitmеnt in multinational oil companiеs in South-South, Nigеria. Based on the findings generated from the study, the researcher therefore concludes that the multinational oil companies in South-South, Nigeria has a great level of staff emolument and job security which has a direct link to their employee commitment. It was rеcommеndеd among othеrs that Multinational oil companiеs and othеr corporatе organizations should еnsurе propеr and adеquatе еmployее еmolumеnt implеmеntation policy. This will adеquatеly еnhancе staff lеvеl of commitmеnt.
Kesejahteraan Psikologis dan Tingkat Stress Pada Mahasiswa Tingkat Akhir di UNIMUS
Authors: Aulia Windi , Oktavia Nur Yanti  , Abdullah Rizki Aditya , Taliki Siti Nuria , Ibrahim Jessica Naurah , Agustin Dewinta , Permatasari Novi Indah , Kusumaninggar Titis Sari , Hasanah Risma Nur , Saputra Riztu Duwi
Published: July 2024

Latar Belakang: Pendidikan tinggi merupakan tahap yang kritis dalam kehidupan seseorang, mahasiswa tingkat akhir dihadapkan pada tekanan yang tinggi karena berbagai tuntutan akademis, hal ini merupakan salah satu faktor yang dapat menimbulkan stress pada mahasiswa. Tujuan: Penelitian ini bertujuan untuk mengetahui karakteristik mahasiswa tingkat akhir dan mengetahui hubungan antara kesejahteraan psikosial dengan tingkat stress pada mahasiswa tingkat akhir di Universitas Muhammadiyah Semarang. Metode: Penelitian ini merupakan penelitian kualitatif dengan pendekatan deskriptif yang mengetahui lebih dalam mengenai tingkat pengetahuan kesehatan reproduksi remaja pada Mahasiswa S1 Keperawatan Universitas Muhammadiyah semarang dengan pengambilan sampel cluster random sampling.  Hasil: Pentingnya menjaga pola hidup sehat untuk menunjang keberlangsungan hidup manusia dari generasi ke generasi. Pola hidup sehat terkait dengan kebersihan lingkungan, kenersihan diri, dan pengetahuan tentang faktor resiko penyakit sistem reproduksi. Sedangkan pada keberlangsungan hidup, seseorang dapat menerapkan dengan menjaga kesehatan reproduksi untuk mencegah penyakit seksual yang menular maupun tidak menular. Kesimpulan: Menjaga kesehatan jiwa dan raga untuk keberlangsungan hidup bangsa sangat penting. Diharapkan pada remaja lebih aktif dalam menjaga pola hidup sehat dengan kebersihan lingkungan, personal hygiene dan pengetahuan tetang faktor resiko penyakit reproduksi.
O uso da realidade aumentada nas aulas de matemática
Authors: Oliveira Fabiane de , Barbosa José Luiz de Andrade
Published: July 2024

Este trabalho apresenta um estudo sobre a Realidade Aumentada (R.A.). A R.A. consiste na inserção de objetos virtuais, através de aplicativos, no nosso ambiente real. Neste projeto pesquisamos como essa tecnologia vem sendo aplicada nas aulas de Matemática. Foi realizado um estudo sobre a Realidade Aumentada tendo como início uma revisão bibliográfica, elaboração de materiais e oficinas, aplicação dessas oficinas juntamente com uma coleta de dados e escrita de artigos. Verificamos que a incorporação da R.A. vem sendo maior nos conteúdos de Geometria Espacial, pois auxilia na aprendizagem de seus conceitos principais. Com isso, utilizar a R.A. para desenvolver oficinas é uma ótima ferramenta para a visualização espacial de objetos que, incialmente só eram possíveis através de imaginação e desenhos nos livros didáticos e quadro negro.
Estudio cualitativo sobre necesidades psicosociales en personal sanitario hospitalario durante la emergencia sanitaria por coronavirus
Authors: Lerma Raquel Melero , Azarola Enrique Negueruela
Published: July 2024

La emergencia sanitaria por SARSCoV19 ha tenido un gran impacto sobre la capacidad asistencial de los hospitales públicos del Sistema Nacional de Salud. Se presupone un impacto sobre la salud mental de los trabajadores que no ha sido determinado con claridad. Se realiza un estudio cualitativo mediante técnica de entrevista con el que se pretende comprender hasta qué punto ha sido afectada la salud mental de los profesionales, seleccionando personal de distintas categorías y unidades de un hospital de titularidad pública de Área Sanitaria, estudiándose las narrativas y destacando 6 temas: enfermedad, situación asistencial, figura del sanitario, relaciones laborales con compañeros, relaciones con la institución y relaciones personales. Se encuentran en cada uno narrativas específicas relacionadas con el impacto de la COVID sobre la salud mental de los profesionales. Se hace necesario determinar el impacto sobre su labor asistencial y encontrar propuestas de intervención psicosocial que alivien o protejan y fortalezcan la resiliencia.