bluuebunny/crossref_metadata_2025 huggingface dataset:
Philosophical Counseling and Loneliness: An Interdisciplinary Approach
Authors: Mijuskovic Ben
Published: July 2023

As individuals, the universal fear of loneliness and the desire to secure intimacy has consumed our thoughts and passions. Ever since the Old Testament and Plato’s dialogues, mankind has searched to gain understanding and insights into the dynamics of loneliness. Traditionally, Western thought has assumed, both theologically and philosophically, that the soul or self is a substance, an independent reality secure in-itself in distinction to an external material world. But following the Scientific Revolution of the seventeenth-eighteenth centuries, science began systematically to question and even reject the “doctrine” of a personal identity. The roots of science are now steadfastly gaining ground in materialism, mechanism, determinism, empiricism, phenomenalism (as opposed to phenomenology), cognitive behaviorism, psychoanalysis, and the current neurosciences, which sciences assume that the lonely and passive patient is best “aided” and “treated” by the active agency and interventions of the clinical “specialist, which often requires pharmacological medications. By contrast, the article contends that philosophical and humanistic therapy and counseling offers a partnered alliance with the subject through interdisciplinary learning. Again, the learning is mutual. The subject controls the issues addressed; it is not a student-teacher relationship.
Pretext of Friendship. Introduction to Philosophical Counseling
Authors: Rossi Annalisa
Published: July 2023

In this essay I will bring together a number of pretexts related explicitly or implicitly to the theme of friendship – experiences and concepts (§ 1), case studies (§ 2), exercises (§ 3), and again patterns (§ 4), variations (§ 5), and styles (§ 6) – which raise significant issues that I will use as an introduction to philosophical counseling. The aim is an original introduction to philosophical counseling starting from philosophical counseling itself and to show concretely, I hope also effectively, what a pretext function means.
The impact of digitalization on the leisure time of today’s youth
Authors: N. Gafner E. Salganova, L. Belova &
Published: July 2023

This article presents the results of research on the impact of digitalization on the leisure of modern youth. The factors in the transformation of leisure activities, the role of leisure practices in the lives of modern Russian youth are revealed. Our conclusions are based on data from the studies independently conducted by the authors from 2003 to 2020. About 2,000 respondents were survived annually. Quantitative survey data were supplemented by the results of interviews with experts, the youth of the small and medium-sized cities of Chelyabinsk Region, frame analysis of case studies and the content analysis of the social networking accounts of young people, secondary analysis and document analysis. The analysis established common practices of youth leisure, identified the impact of digitalization on the changing shape of the leisure activities and identified the destructive effects of the Internet on the leisure of today's youth of the South Urals.
Philosophy for Children and respect as a value in preschool education
Authors: Talias Yael Dafna
Published: July 2023

After a long period of practical experience in the kindergarten and day care section of the department of education, an opportunity arose to expand my influence into the education of children aged birth-three. Despite the importance of high-quality educational programs for this age group, it was only recently that a bill was passed regarding licensing and supervision of educational frameworks for children under three. Based on a theory of change, this study will proceed from the assumption that any change of values with the caregivers would only be significant if it existed through nannies who love their work and want to pursue it long-term. Furthermore, caregivers, whose work experience will be valued by the organization, will be able to produce a similar experience for the children under their care. In this study, I try to find out whether recognition and respect support the relationship in the daycare and allows the caregivers to experience respect, meaning and influence.
Against the (main) stream: feminist thinkers and the philosophical canon
Authors: Bălan Ana
Published: July 2023

The philosophical canon has long been criticized for its lack of diversity, particularly in terms of gender. Feminist thinkers have challenged this tradition, arguing that it reflects a narrow and exclusionary view of the world. The present article examines the ways in which feminist philosophers have contributed to expanding the philosophical canon through their critiques of traditional philosophy and the inclusion of previously marginalized perspectives. Drawing on the principles of intersectionality, feminist thinkers have highlighted the ways in which various forms of oppression intersect and reinforce one another. By doing so, they have exposed the limitations of traditional philosophical approaches and expanded the scope of philosophical inquiry. This article argues that the work of feminist philosophers has not only enriched the philosophical canon, but also helped to challenge and transform the dominant cultural narratives that have historically excluded marginalized voices. Ultimately, this article advocates for greater recognition and inclusion of feminist perspectives in the philosophical canon, as a means of promoting a more diverse and inclusive understanding of the world.
Gender equality normative and applied ethics in global automotive suppliers companies
Authors: Marcu Angelica Laura
Published: July 2023

The article investigates how gender equality normative ethics is applied in global automotive suppliers companies across the globe for women in management positions. Although women represent almost half of the global workforce, women have still not reached equality in terms of management positions in global automotive suppliers companies. There is a gap between the gender equality normative ethics present in almost all codes of conduct or codes of ethics of these companies and the gender equality applied ethics in terms of women in management positions. The paper argues that gender equality normative ethics is not detailed expressly and the applied ethics for women in management positions is lacking. The article identifies the gender equality representation of women in management positions in the global automotive suppliers companies based on the public codes of conduct or codes of ethics of these companies of the companies. In this paper, I try to identify what could be the next steps on a normative ethics so that gender equality for women in management positions can be achieved.
Eco-philosophy for children: a philosophical approach that reconciles us with nature
Authors: Stratan Alis
Published: July 2023

A development in our understanding of our own nature has implications at different levels. Of great relevance are the ecological consequences, considered of most importance for our future life on earth. For decades environmental ethics has been trying to find possible answers and solutions. An increasing number of ecological movements talk about the necessity of a deeper change, one which confronts the status qvo and determines important changes in the way humans perceive their place and role in the natural ecosystem. However, the importance of children`s role in this endeavor is neglected and reduced to simple approaches: spending more time outdoor and/or offering more theoretical lessons on biology.  The content will show that children have the natural inclination, the inborn values and also the capacity to undergo a philosophical process for a deeper understanding of nature and themselves. This paper purpose is to underline the importance of children in the odyssey of change and the necessity of a philosophical approach. Equally, to show possibilities of practicing eco-philosophy for children that could represent a starting point for future initiatives in education.
Statistical mix design method for self-compacting concrete with limestone fillers
Authors: Nécira Brahim , Djireb Samir , Belkacem Mounia
Published: July 2023

This study presents a statistical mix design method for self-compacting concrete (SCC) with limestone fillers (LF) content that considers mortar rheological properties and material packing characteristics. The effect of LF on the rheological properties of SCC was investigated through seven SCC mixes with different LF replacement levels. A basic water demand experiment was designed to obtain the packing density of mortar, and the equivalent packing density was defined and calibrated to represent the effect of LF. The relative spread and relative flow formula were modified based on the equivalent packing density, and the bilinear interpolation method was used to analyses the mortar results.
Enhancing Heart Disease Prediction using Deep Learning Model
Authors: Gasmi Safa , Djebbar Akila , Merouani Hayet Farida
Published: July 2023

Cardiovascular disease, often known as heart disease, is the most common disease affecting people in general. Heart disease is a general term for any medical issue that impairs the heart's ability to pump blood. The most frequent cause of heart failure is a narrowing or blockage of the coronary arteries, which provide blood to the heart. The most frequent type of heart disease and the main factor in heart attacks is coronary artery disease (CAD). These days, there is no upper age restriction on who might contract this illness. There are many different ways for diagnosing diseases, but the majority are expensive, risky, and need technical professionals. Before a heart attack happens, effective treatment of cardiac patients depends on the accurate prediction of heart disease. Recently, a variety of machine learning techniques have been proposed to predict and diagnose cardiac diseases. However, these methods are unable to handle large data sets and as a result do not provide accurate results for the prediction of cardiovascular diseases. The purpose of this study is to assess a deep learning (DNN) model ability to predict the incidence of cardiovascular diseases using a widely used reference dataset.In comparison to other machine learning models, the deep learning model achieved the highest accuracy, F1-score, and precision values (97.07%, 97.07%, and 97.08%).
Maximum Power Point Tracking for Photovoltaic System under Partial Shading Conditions using Aquila Optimizer Algorithm
Authors: KORICH Belkacem , ELBAR Mohamed , BAKRIA Derradji , BELADEL Abdelkader , TETA Ali , DOURARI Ahmed Lamine
Published: July 2023

The output of photovoltaic (PV) systems can be affected by inconsistent irradiance, temperature, and unexpected weather conditions, classified as partial shading conditions (PSC). To address these difficulties, this work applies an Aquila optimizer algorithm (AO), a bio-inspired meta-heuristic algorithm, to track the multiple-peak P–V curve in PV systems under such PSCs. The results of the AO algorithm were found to be highly efficient, reliable, and precise in normal conditions, PSCs, and fluctuations in irradiance. Additionally, the AO algorithm was shown to have a much better performance when compared to the particle swarm optimization algorithm (PSO) and perturb and observe (P&O) algorithm. The work was validated and executed using MATLAB/Simulink software.
Electrochemical and Mechanical Studies of Metal Parts Manufactured by CMT
Authors: BELLAL Youcef , BOUHANK Antar , ABABSA Abdelmadjid
Published: July 2023

An electrochemical study is carried out on metal parts manufactured by cold metal transfer (CMT) with ordinary steel under different working conditions (deposition speeds; V= 800, 1200 and 1600 m/min and current density; I= 50, 75 and 100 A) at a constant flow rate of inert gas QArgon/CO2 = 12 litre/min. The samples were immersed in an aggressive environment (H2SO4; 0.5 M). The electrochemical study was carried out using potentiodynamic polarization spectroscopy and impedance measurement. Morphological investigations carried out by scanning electron microscopy (SEM) confirm the electrochemical results. the deposition rate proportionally influences the polarization resistance with a rate equal to 60% and 43% for the metallic samples fabricated at current density I=100A, and I=75A respectively. The metallic samples fabricated at the current density I=75A have a good polarization resistance with a resistance rate equal to 54% compared to the metallic samples fabricated at I=100A, this confirms that the CMT process does not require great heat, on the other hand, it needs more cooling time, which is reflected in the deposition rate. Finally and to confirm the mechanical resistance on the parts manufactured in different working conditions, mechanical tests of pressure, attraction and shearing were carried out and gave us different results, which confirms the influence of its parameters on the mechanical resistance.
Evolution of Entropy Generation on Mixing Process Using a Novel Chaotic Micromixer
Authors: Tayeb Naas Toufik , Abdelkader Mahammedi , Tounsi Chati
Published: July 2023

This study aims to compare numerically the laminar steady flow of shear-thinning non Newtonian fluids in novel chaotic micromixer. The process is verified for non-Newtonian flow in a complex geometry that is heated with a constant flux. The selected geometry produce secondary flow structures that greatly improve fluid dynamic performance. To measure this performance, the Poincaré map method is used for various cases of fluid power-law index in different geometries. In addition, thermal mixing behavior is studied for shear-thinning fluids in the chosen geometry with two different inlet temperatures.In different cases of fluid power-law indexes, the novel geometry resulted in an 82% increase in thermal mixing degree relative to the thermal mixing degree observed in the C-shaped and serpentine channels. The second law of thermodynamics is examined in terms of entropy generation caused by thermal and hydrodynamic processes, as a function of low rates of generalized Reynolds number and power-law index, while taking into consideration the effects of chaotic advection. As a result, the new configuration showed a significant improvement in the degree of mixing compared to other geometries considered, while also minimizing friction and thermal irreversibilities.
Performance Enhancement of Wind Turbine System: Numerical Investigation
Authors: Tayeb Naas Toufik , Mostefa Telha , Tounsi Chati
Published: July 2023

In this work, a numerical model of a domestic wind turbine with a horizontal axis of varying power between 0.4 kW and 50 KW, were proposed to exhibit the wind turbine performances.The numerical analysis was performed using the computational fluid dynamic (CFD) tool to solve 3D Navier-Stokes equations. The efficiency of power wind turbine is estimated for different cases of Reynolds number and experimental data (rotor diameter; height of mast; wind speed; speed of rotation; energy produced). The results showed that the effect of the uniform flow of air around on the turbine pressure and the velocity. Streamlines, vectors and the power of the wind turbine were analysed in details.
Framing Analysis of ChatGPT in Malaysian English Newspaper
Authors: Wong Michelle
Published: July 2023

Ever since the release of the Artificial Intelligence (AI) driven text tool named ChatGPT, society has started a wildfire of discussion regarding its pros and cons. However, ChatGPT has been given wide attention due to its availability and accessibility. People can easily assess the tool from their smartphones or computers. Thus, this research explores how newspapers frame ChatGPT. It is important as newspaper portrayals are responsible for shaping public opinion. Using a qualitative approach, the researcher used framing analysis to analyse data collected from a Malaysian daily English Newspaper, The Star. The newspaper articles were collected for a period of three months starting February 1st to April 30th, 2023. The rationale behind the period was that ChatGPT Plus was made available in Malaysia in February. A total of 69 articles were found. However, only 17 articles were written locally while the rest were taken from international news agencies. Thus, the study will only include the local articles to see how they were written in a local context. The study found three major recurring themes which are responsibility, consequence, and human-interest frames. The newspapers urged society to embrace AI, especially in the education and business sectors. More emphasis was put on practitioners in their respective industries to set up policies to guide the usage of ChatGPT. Meanwhile, consequence frames were highlighted when the newspapers covered the low side of ChatGPT such as the dangers of fraud, phishing as well as plagiarism. Finally, the human-interest frame could be found when the newspaper shed light on some human conditions such as celebrities' and students’ opinions on ChatGPT. With that, the findings suggest that Malaysian newspapers should give more diverse coverage on the topic itself. It is evident that the newspaper should look at their roles as public watchdogs to serve the public's interest.
Fully Developed Laminar Flow of Heat Transfer Non-Newtonian Flow in Ducts with Arbitrary Cross-Sectional Shape
Authors: Tayeb Naas Toufik , Tounsi Chati
Published: July 2023

The pressure drop and heat transfer properties of a laminar flow with circular, square, and triangular cross sections and a constant heat flux boundary condition are given by a numerical solution. A 3D Navier-Stokes incompressible flow and energy equation serves as the foundation for the numerical model. Results are tabulated and given visually for the velocity field, Poiseuille number, and Nusselt number product for various power-law indices (0.5 n 1.0). One of the analyzed ducts causes a greater heat transfer intensification along with a significant pressure loss. A different type of duct allows for a better balance between pressure loss and heat transfer. In order to verify the accuracy of the numerical codes created in the current study, critical comparisons with earlier findings in the literature are also carried out.
Masonry Wall Reinforcement
Authors: Djeffal M. , Merdas A.
Published: July 2023

Unreinforced masonry has been used as a construction material for thousands of years. Whilesome of these structures survive to this day, these tend to have massive walls and would be unpractical formodern use. Unreinforced masonry can be reinforced with proper masonry techniques. As a result,reinforced and confined types of masonry were developed to exploit the strength potential of masonry andto solve its lack of tensile strength, significantly improving not only resistance, but also ductility andenergy dissipation capacity.Fiber reinforced polymer composites have emerged as an effective means of reinforcing masonrystructures due to their high mechanical characteristics, low weight and durability. The role of FRPmaterials is to act as a tensile reinforcement which can be used to improve the ability of a wall against inplane shear and/or out-of-plane bending.This contribution, based on experimentation and numerical modelling, aims at a better understanding ofthe behaviour of structures in masonry. Multiple reinforcement techniques and methods are illustrated inthis summary, such as the reinforcement of masonry walls by composite materials like CFRP (CarbonFiber Reinforced Polymer) and glass fibre reinforced polymer (GFPR), also there are Near surfacemounted (NSM), carbon fibers reinforced polymer (CFRP) and other techniques are cited in this work.
Extending The Product Integration Method
Authors: BEN DAHMANE Raouia , BEN DAHMANE Khanssa , KABOUL Hanane
Published: July 2023

We examine a weakly singular kernel Fredholm integral equation of the second kind in1([ ] R) and provide adequate conditions for the solution’s existence and uniqueness. Furthermore, weexpand the product integration technique initially proposed in 1([ ] R) and adapt it to 1([ ][ ] R). To demonstrate its effectiveness, we present numerical evidence along with an application inAstrophysics.
Stability result of solutions for a Transmition wave equation with internal neutral delay
Authors: Sabah Baibeche , Lamine Bouzettouta , Chafia Karek
Published: July 2023

This study examines a wave equation on a bounded domain that incorporates internal neutraldelay. By establishing certain conditions, we prove the existence and uniqueness of the solution.Furthermore, we utilize semigroup theory to demonstrate the existence and uniqueness of the problem'ssolution. Additionally, we employ H. Levine's concavity theorem to establish a time estimate for theexplosion of the solutions in Sobolev spaces
Effect of annealing treatment in the mechanical proprty of chromium carbides films
Authors: Malla Meryem , Linda Aissani  , Belbah Ahmed , Bezazi Abderrezak
Published: July 2023

Applications of thin film technology have grown quickly, including thermal insulation, cuttingtools, solar cells, protection against oxidation and corrosion, and microelectronics. The use ofthermoelectric thin films, which have several advantages over bulky sensors (such as sensors of: heat flow,radiation, pressure, electric power, and thermocouples), is widespread. Chromium carbides are widelyattracted for industrial applications by their good hardness, high chemical stability, and toughness. Thepresence of carbon in the composition of chromium metal improves the hardness and the wear resistanceby lubricating effect. In this work, the chromium carbides films deposited from pure Cr target by the PVDmethod on steel substrates are developed and characterized. In this study, the samples are annealed undervacuum in a temperature range between 800 and 1000 °C. The improvement of the mechanical property ofthin Cr films is due in particular to the fact that the hardness and wear obtained in this temperature rangeare very important. The increase in hardness is attributed to the formation of hard binary Chromiumcarbides. However, its decrease was related with the diffusion of iron and the transformation of binarychromium carbides to ternary carbides at higher annealing temperatures.
Deep Eutectic Solvents: Green Applications
Authors: Nashef Enas
Published: July 2023

Recently, ionic liquids (ILs) have attracted considerable attention in scientific research as greensolvents. Owing to their low vapor pressure, ILs were qualified as green solvents. However, the ”greenaffiliation” of ILs is now contested by many research groups. The hazardous toxicity and the very poorbiodegradability of many ILs have been reported in the literature. Additionally, their synthesis generallyrequires a large amount of salts and solvents. These drawbacks and the high price of common ILs delayedtheir industrial applications. To overcome these drawbacks, a new generation of solvents, named DeepEutectic Solvents (DESs), has emerged. DESs can be formed by mixing, at moderate temperature, two ormore components that can be chosen to be cheap, renewable and biodegradable. These compounds arecapable of forming a eutectic mixture with a melting point lower than that of the individual component.DESs are generally liquid at temperatures lower than 100 C.Many DESs have similar physical-chemical properties to those of ILs, while being much cheaper andenvironmentally friendlier. Owing to these advantages, there is growing interest in DESs in many fields ofresearch. DESs are chemically tailorable solvents since they can be designed by properly combining variousquaternary ammonium or phosphonium salts with different hydrogen bond donors (HBD) or complexingagents. Hence, task-specific DESs with different physical-chemical properties can be prepared.In this work, we discuss the important contributions of DESs in diverse applications, e.g. electrochemicalprocesses, catalysis, synthesis, absorption of CO2, desulfurization of fuels, separation, and dissolution andextraction processes.
Deep Learning Based Prediction of axial turbine performance for Clean Organic Rankine Cycle system driven by low-temperature heat source
Authors: Naas T.T. , Mahammedi A. , Rahmani K.
Published: July 2023

The big data performances of Organic Rankine Cycle (ORC) system is widely used in avariety of industrial applications. In some processes, the axial flow turbine at the low temperature heatsource is crucial. The goal of this work is to increase the high efficiency of a tiny axial turbine poweredby an Organic Rankine Cycle (ORC) utilizing numerical studies and deep learning method. To providethe best performance for the Organic Rankine Cycle (ORC) application, various turbine stages aresuggested. Three-dimensional RANS computations are recommended for five different rotational speedsand four mass flow rates ranging from 0.2 to 0.5 kg/s with an inlet temperature of 365 K in order todescribe the hydrodynamic and thermodynamic capabilities and get a big data. The analysis show that thetwo-stage turbine with a fixed rotational speed delivers the highest power output value of 10000W, hasthe highest turbine efficiency of 86%.In a three-stage turbine arrangement operating at steady state, theefficiency of the turbine and its output are 89% and 12000 W, respectively. The maximum values forturbine efficiency and power production are 88% and 12000W, respectively, as a result of the transientcomputational procedure. These results demonstrate the potential for exchanging low temperature heatsources using micro-three-stage axial turbines in Organic Rankine Cycle (ORC) systems .
Düktil Boru Üretimi İçin Hidrolik Devre Tasarımı ve Simülasyonu
Authors: ŞENEL Mahmut Can
Published: July 2023

Günümüzde, modern tesis ve fabrika inşaatlarında hidrolik tesisatların yapımı kaçınılmaz bir unsur olarak görülmektedir. Bu tesisatlar, elektrik, su ve kanalizasyon gibi altyapı sistemleriyle birlikte, orta ve büyük ölçekli işletmelerin tamamında ve küçük işletmelerin bir kısmında kullanılmaktadır. Bu çalışmada, düktil boru üretiminde kullanılabilecek hidrolik bir devrenin tasarımı ve simülasyonu gerçekleştirilmiştir. Düktil boru üretiminde kullanılan en önemli cihazlar santrifüj makinası ve indüksiyon ocağıdır. Bu cihazlardan santrifüj makinasının ileri-geri hareketi ve indüksiyon ocağına ait pota kapağının hareketihidrolik devrelerle sağlanmaktadır. Bu çalışmayla, Fluid-Sim hidrolik paket programından faydalanılarak santrifüj makinasının ileri-geri hareketini ve indüksiyon ocağına ait pota kapağının hareketini sağlayansanayide kolaylıkla kullanılabilecek bir tertibat geliştirilmiştir. Bu sayede işlem hızının artışı, zamandan tasarruf ve işçilik masraflarında düşüş gibi kazanımlar elde edilmiştir.
The Importance of Rose and Rosehip Species in Past, Present, and Tomorrow
Authors: HATİPOĞLU İbrahim Halil
Published: July 2023

Rose and rosehip species have been important to people in different civilizations since the historical period. There are many natural and cultural Rosa species in Anatolia, which is an important area for Turks and has been a homeland for many years. In the study, information about the use of these species in the historical process, nutritional values, mythology and current developments were obtained. In addition, today, recommendations for these special species have been determined.
The Relationship Between Exercise Addiction Levels and Healthy Nutrition Levels of Students Studying at the Faculty of Health Sciences
Authors: YILDIZ Abdurrahim
Published: July 2023

Introduction: Exercise is planned, structured, voluntary, continuous activities aimed at improving one or more elements of physical fitness. One aspect of healthy lifestyle behaviors is nutrition, while another aspect is exercise and physical activity. Many studies in the literature emphasize the physical, psychological, and physiological benefits of regular physical exercise. Therefore, in our study, we aimed to investigate the relationship between exercise addiction levels and healthy nutrition levels of students studying at the faculty of health sciences.Method: The study was conducted on 133 students studying at the faculty of health sciences. Participants' demographic and income information was recorded. Exercise dependence levels were evaluated with the Exercise Dependence Scale, and nutritional levels were evaluated with the Nutrition Exercise Behavior Scale.Results: Average age and body mass index of the participants, respectively; It was 21.83±4.21 and 18.13±3.09. It was found that there was a correlation between the exercise addiction levels of the participants and their healthy eating habits (p<0.001-r=0.386). In addition, it was found that there was no significant correlation with the subscale evaluating unhealthy nutrition parameters (p=0.401-r=0.073).Conclusion: It has been observed that there is a positive correlation between exercise addiction and healthy nutrition levels of students studying at the faculty of health sciences. Accordingly, it is seen that more attention is paid to the level of exercise and healthy nutrition. We believe that exercise should be an integral part of daily activities for a healthy diet.
Kalman Filtresi Parametre Değişimlerinin Batarya SoC Tahmini Üzerine Etkileri
Authors: KORKMAZ Mehmet
Published: July 2023

Küresel ısınma ve iklim değişkenliğinin başat aktörlerinden birisi fosil yakıtların tüketilmesidir. Özellikle ulaşım endüstrisi yüksek miktarda petrol ürün gereksinimlerinden dolayı bu duruma önemli ölçüde sebep olmaktadır. Bu noktada elektrikli araçlar bir alternatif olarak düşünülmektedir. Gelişen batarya teknolojisi, özellikle de Lityum iyon (Li-ion) bataryaların geliştirilmesi ile fosil yakıtlı araçlardan elektrikli araçlara geçiş mümkün olabilmektedir. Li-ion bataryaların yüksek enerji yoğunluğu, düşükboşta deşarj etkinliği, hafıza etkisinin olmaması, hızlı şarja imkan vermeleri, uzun çevrim ömrü gibi özellikleri sayesinde elektrikli araç teknolojisinde tercih sebebi olmaktadır. Bu avantajlarının yanı sıra elektrikli araç endüstrisinde bu türde bataryaların kullanılmasıyla ortaya çıkan bazı problemlerde bulunmaktadır. Bunların en başında kalan enerji miktarını gösteren şarj durum gösterge (SoC) değerinin bulunmasıdır. Bu değerin doğru bir şekilde elde edilmesi hem batarya yönetim sistemi (BMS) için önemli bir koşul hem de kullanıcının sürüş konforu açısından vazgeçilmez bir unsurdur. SoC değerinin doğru bir şekilde elde edilmesi için kimyasal, analitik, algoritmik birçok yöntem kullanılmaktadır. Kalman filtresi tabanlı yöntemler ise SoC değeri hesabında akla gelen ilk metotlardandır. Yinelemeli yapıları sayesinde SoC değerinin gerçek değere yakın bir şekilde tahmini mümkün olmaktadır. Ancak bu filtrelerde gürültü değerlerinin SoC değişimi üzerine etkileri olabilmektedir. Bu çalışmada bu türde bir etkinin nasıl olacağı irdelenmiştir. Gürültü değerinin pozitif veya negatif yönde belirli aralıklarda değişimi için SoC ve terminal gerilim değerlerinin değişimi ele alınarak sonuçlar Turnigy Graphene 5Ah bataryası için değerlendirilmiştir.
Non-Integer Order Proportional Integral Control for Time Delay Plant with Single Fractional Order
Authors: Şenol Bilal , Avuçlu Emre , Demiroğlu Uğur , Matušů Radek
Published: July 2023

This paper studies the tuning of non-integer order proportional integral controller for time delay plants having one fractional order in its denominator polynomial. The well-known first order plus time delay plant is reorganized to have the order of the operator s to be an arbitrary real number. The main aim is to tune the parameters of the fractional order proportional integral controller to make the mentioned plant behavior to be stable and robust against unexpected changes in the gain of the system. The approach here is a graphical point of view on the Bode diagram. The two crossover points in the Bode diagram, the gain crossover frequency and the phase crossover frequency are tuned towards the desire of the researcher. This brought us to extend or to restrict the distance between these two crossover frequencies and thus, to provide the stability and robustness of the system. The design process is an analytical way from beginning to the end. Hence, the method is more reliable when compared with the methods based on optimization. This paper presents the findings of the first step in the research. The formulas to design the controller are found and the results are shown on an illustrative example.
Improving the Prediction Performance of Protein Protein Interaction Sites Using Xgboost and Optimization
Authors: GÖKTEPE Yunus Emre
Published: July 2023

Since proteins have important tasks in all processes within the cell they are vital elements for all living organisms. They are significant in regulating most of the biological processes which occur in a cell. They are widely researched to comprehend roles of them and to assist drug design studies. In these tasks, they usually work by interacting with other proteins, not alone. Thus, predicting protein-protein interactions and protein protein interaction sites is an important problem in bioinformatics. There are a number of computational methods developed for this prediction task. DeepPPISP-XGB is one of these methods and produces promising predicting results. In this study, we proposed an optimization process in order to improve prediction results of this method. This optimization process produced 1.5% better AUROC value and 3.3% better AUPRC value compared to DeepPPISP-XGB method.
İkili fayans tozu, tuğla tozu ve cam tozu bazlı geopolimer kompozitlerin mekanik özelliklerinin incelenmesi
Authors: GÜNEL Gazi , SEVİM Özer , DEMİR İlhami , ALAKARA Erdinç Halis
Published: July 2023

Dünya nüfusunun hızlı bir şekilde artmasıyla yapı ihtiyacına karşı duyulan talepler de artış göstermektedir. Beton, yapıda en çok kullanılan yapı malzemeleri arasında yer almaktadır. Betona bağlayıcılık özelliği kazandırmak için çimentoya ihtiyaç duyulmaktadır. Bu ihtiyacı karşılama doğrultusunda yüksek miktarda sera gazı salınımı ve doğal yaşam alanlarının tahribatı gerçekleşmektedir. Çimento üretimi sonucu doğaya verilen bu zararı bertaraf etmek amacıyla puzolanik malzemeler çimento yerine ikame edilerek kullanılmaktadır. Çimentonun diğer bir alternatifi olarak geopolimer beton karşımıza çıkmaktadır. Geopolimer beton çimentodan tamamen bağımsız, puzolanik malzemelerin alkali çözeltilerle aktive edilmeleriyle elde edilmektedir. Geopolimerlerin çevreci olmasının yanı sıra mekanik ve fiziksel özellikleri bakımından geleneksel betondan daha üstündür. Bu bağlamda çalışmada bağlayıcı malzeme olarak inşaat yıkıntı atıklarından elde edilen Fayans Tozu (FT), Tuğla Tozu (TT), Cam Tozu (CT) ve alkali aktivatör olarak NaOH kullanılmıştır. Geopolimer harçlar bağlayıcı malzemelerin farklı oranlarda kullanılmasıyla ikili karışımlarla hazırlanmıştır. 100 ℃ etüvde, 24 saat kür edilen harçlara eğilme dayanımı ve basınç dayanımı testleri yapılmıştır. Sonuçlar incelendiğinde; cam tozu ikameli ikili karışımlarda, cam tozu ikame oranının artmasıyla eğilme ve basınç dayanım değerleri de artış göstermiştir. Cam tozunun yalnız başına geopolimer harçlarda bağlayıcı olarak kullanılabileceği sonucuna ulaşılmıştır. Ayrıca servis ömrünün doldurmuş yapıların yıkım çalışmaları sonucunda meydana gelen atıkların geri dönüştürülerek kullanılması sürdürülebilir çevreye katkı sağlayacaktır.
Piroteknik Malzemelerin Ömürlerinin Belirlenmesinde Kullanılan Yaşlandırma Mekanizmalarının İncelenmesi
Authors: ÖZKAN Kaan Turgay , PUL Muharrem
Published: July 2023

Piroteknik malzemeler, sıcaklık, nem, titreşim ve darbe gibi dış etkenlere maruz kaldığında yapılarında kimyasal ve fiziksel bozunmalar meydana gelmektedir. Bu değişimler sonucunda piroteknik malzemelerin hizmet ömürleri, beklenen performansı ve güvenilirliği azalmaktadır. Bu sebeple son yıllardapiroteknik malzemelerin hizmet ömrüne yönelik çalışmalar önem kazanmaktadır. Flynn/Wall/Ozawa Method ve Kissinger Yöntemi kapsamında TGA (Termogravimetrik Analiz ) yapılarak malzemenin bozunma (yaşlanma) reaksiyonu parametreleri hesaplanıp hızlı yaşlandırma yapılarak, istenilen süre sonrasında malzemelerin fonksiyonel ve depolamaya yönelik performans ve güvenilirliği belirlenebilmektedir. Bu çalışmada MTV piroteknik malzemesinin hızlı yaşlandırma yöntemi için gerekli olan yaşlanma(bozunma) reaksiyonu kinetik parametreleri TGA ile elde edilen değerler yardımıyla Flynn/Wall/Ozawa Methodu ve Kissinger Yöntemi kullanılarak hesaplanması amaçlanmış ve iki yöntemde elde edilen parametreler karşılaştırılmıştır. Çalışma sonucunda; Flynn/Wall/Ozawa Methodu ve Kissinger Yöntemi ile piroteknik malzemelerin yaşlanma (bozunma) reaksiyon parametreleri ile ilgili değerler elde edilmiş ve değerlerin iki yöntemde birbiri içerisinde yakın olduğu görülmüştür.
Determination of Cutting Tool Performance Characteristics in Machining Nickel Based Super Alloys
Authors: ALTIN Abdullah
Published: July 2023

Cutting tool materials often undergo severe mechanical stresses and thermal changes when machining nickel-based superalloys. The stresses and temperatures that arise when machining nickel-based superalloys greatly increase the blunting and wear rate of the cutting tool. As a result, tool life is adversely affected. It is seen from important studies that adhesion and abrasion wear mechanisms are more dominant in the processing of Inconel 718. The work material adheres to the cutting edge, forming a BUE. Depending on the cutting conditions, stable BUE is not always formed and this layer is sometimes repeatedly removed with the chips. Notching in the depth of cut, wear on the tool nose and coating layer is caused by the presence of hard particles in Inconel 718 and causes severe flank wear. Flank wear and notch are the main factors limiting tool life, and oxidation and diffusion occur as a result of high temperatures.
Nanocomposite Materials Used in Heat and Sound Insulation
Authors: COPUR Veli , GUNOZ Alper , KARA Memduh
Published: July 2023

–The use of composite materials, which are widely used in many areas of industry, in heat and sound insulation is increasing rapidly. In this study, primarily composite and nanocomposite material definitions were made. In addition, composite and nanocomposite application examples and different solution examples in heat and sound insulation are mentioned. The advantages and disadvantages of nanocomposite structures are presented in the study.
RANS-DES Comparison on the Numerical Modelling of a Downforce Generating Wing Moving over a Solid Surface
Authors: Ozdemir Yavuz Hakan , Cosgun Taner
Published: July 2023

Present paper covers the numerical modelling of a 3D wing operating near a solid surface using Reynolds Averaged Navier Stokes (RANS) and Detached Eddy Simulation (DES). The characteristics of the flow over a wing near a surface is significantly different from the free flight. Capturing the changing aerodynamics of an object moving close to a surface have importance for flight and vehicle aerodynamics. This study aims to investigate the reliability of RANS and DES turbulence modelling approaches on the numerical solution of the challenging ground effect flow physics of the downforce generating (or inverted) wings. For this purpose, a 3D symmetrical wing moving in the close proximity of a solid surface is numerically modelled in fully turbulent flow conditions. The results show that, DES approach predicts the lift force slightly better than RANS. On the other hand, tip leakage flow capturing and the separating vortex field modelling of the DES approach is clearly superior. Comparison of velocity, vorticity and the vortex visualization results are presented for the better understanding of the performance of the two modelling approaches.
Demir Oksit ile Hümik Asit Adsorpsiyonu
Authors: ÇELİK Suna Özden , Nesli  , KAYKIOĞLU Gül
Published: July 2023

Bu çalışma ile, önemli bir doğal organik madde (DOM) fraksiyonu olan hümik asitin (HA), demir oksit kullanılarak adsorbsiyon yöntemiyle su ortamından giderimi ve adsorpsiyona iyonik şiddet etkisi araştırılmıştır. Çalışmalar iyonik şiddet varlığında, 5 ila 100 mg/L aralığında HA içeren su örneklerinde ve 100 ve 500 mg/L demir oksit (DO) ile, pH 4-6 aralığında yürütülmüştür. Çalışma kapsamında pH, iyonik şiddet ile DO ve HA konsantrasyon değişimlerinin adsorbsiyona etkisi incelenmiş, adsorpsiyon kinetiği ve izotermi belirlenmeye çalışılmıştır. Elde edilen bulgulara göre, çözeltinin pH değerinin artmasına bağlı olarak DO ile HA adsorpsiyonu azalmıştır. Genellikle, HA gideriminde, DO konsantrasyonundaki artışın etkisi, iyonik şiddet oluşturmak için eklenen Na2SO4, NaCl, ve Na3PO4’ün olumsuz etkilerini azaltma yönünde olmuştur. Temas süresi arttıkça adsorpsiyonun arttığı belirlenmiştir. Adsorpsiyonun dengeye ulaşma süresi 120 dakika olarak gözlenmiştir. Adsorpsiyonunun HA ve DO dozuna güçlü şekilde bağlı olduğu ve Langmuir modeline uyduğu tespit edilmiştir. Maksimum adsorpsiyon kapasitesi (qmax) 222,2 mg/g olarak belirlenmiştir.Kinetik değerlendirmede HA adsorpsiyon reaksiyonunun ikinci derece kinetik modele uyduğu bulunmuştur.
Design and Assessment of the Solar Energy Based Direct Steam Generation Supercritical CO2 Brayton Cycle
Authors: ÇELİK TOKER Serpil , KIZILKAN Önder
Published: July 2023

The aim of this study is to examine the performance of the supercritical CO2 Brayton cycle (sCO2-BC)with intercooling and reheating for low-temperature solar energy application. The heat required for the sCO2-BC is supplied from an evacuated tube solar collector. Energy and exergy analyses of the solar energy-assisted sCO2-BCwith intercooling and reheating are investigated. In addition, the effects of operating parameters like solar radiation, collector number, compressor, and turbine input pressure on system performance are examined parametrically.According to the findings of the analysis, the net power production is found to be 0.2687 kW. In addition, the solar energy-based sCO2-BC's energy and exergy efficiencies are found to be 3.68% and 3.95%, respectively. Moreover, it has been determined that the sCO2-BC's energy and exergy efficiencies reduce with the increase of solar irradiation, the collector number, and the compressor inlet pressure, while the system's energy and exergy efficiencies rise with the increase of the turbine input pressure.
Development and Characterization of a Paper-Based Sensor for Colorimetric Urea Detection in Artificial Urine
Authors: YAŞASIN Burak , ŞEN Mustafa
Published: July 2023

Toxic nitrogen, which is formed as a result of the breakdown of proteins, is converted into nontoxic urea by the enzymes in the "urea cycle". While a small part of the produced urea is eliminated with sweat, a large part is removed from the body by the kidneys with urine. Therefore, urea determination in blood and urine provides important information about kidney functions. In this study, a colorimetric paper based sensor was developed and characterized for use in urea detection. Basically, urea measurement was carried out by immobilization of urease enzyme on pH sensitive papers. The determination of urea was made by observing the changes in pH caused by ammonia with basic properties, which is formed as a result of the destruction of urea by urease. In the presence of different concentrations of urea, the colorimetric changes on the sensor were visualized with a camera and analyzed with the ImageJ program in the computer environment. In the first stage, a calibration curve showing the relationship between urea concentration and color intensity was obtained, and then the detection limit and sensitivity of the system were determined from this curve. Finally, the selectivity of the sensor was demonstrated by testing the different molecules involved.
Data Scientist Selection in IT Industry: SMCDM Approach
Authors: Nacar Emine Nur
Published: July 2023

Traditional Multi-Criteria Decision Making (MCDM) methods cannot provide solutions to problems that may be encountered in the near future. Basically, MCDM methods have a very rich algorithmliterature for decision making problems. Traditional MCDM methods do not take short-term changes into account. In a new development, it is necessary to start the process from the beginning and solve the problem from the beginning. This leads to huge loss of money and time. The purpose of developing the MCDM method is to make decision-making problems more efficient and to prevent losses in the process. However, the MCDM method is a method that has been developed based on the changes in the process, which is a problem that has not been addressed until now. Since it will be tiring and difficult to solve the problem by assigning new weights from the beginning, the Stratified Multi-Criteria Decision Making (SMCDM) Method has been developed for the possibilities that may occur in the near future. In this study, an exemplary study of the SMCDM method was carried out in a IT company. In the data scientist selectionproblem, the best alternative was selected with the SMCDM method, taking into account the events that may occur in the near future.
Evaluation of the Unslotted CSMA_CA in Zigbee Networks
Authors: KHOUNI Sadika , KHESRANI Samia
Published: July 2023

A Zigbee network with 12 nodes (end device) and a coordinator is developed to evaluate the performance of the un-slotted CSMA_CA protocol for the two frequency bands 2.4GHz and 900 MHz by varying the BE (Backoff Exponent) parameter . The simulation is effected for BE=1, 2 and 3 to observe the End to End delay which characterizes the response speed of the network. The network implementation and his simulation were effected under Opnet 14.5.
Reküperatörlü Kombine Güç Çevrimlerinin Optimum Çalışma Şartları ve Performans Analizi
Authors: Keven Arzu , Karaali Rabi
Published: July 2023

Dünya’da enerji maliyetinin ve talebinin artması, çevre kirliliği ve sınırlı kaynaklar gibi problemlerden dolayı güç üretiminde ve diğer proseslerde ortaya çıkan atık ısıların enerjilerinin atmosfere atılmadan önce nasıl değerlendirilebileceği konusu araştırmacılar için önemli bir konu haline gelmiştir. Proseslerden ya da çeşitli ısı kaynaklarından ortaya çıkan ısı enerjisi ile gaz türbini ya da motorlardan çıkan sıcak egzoz gazlarının ısı enerjisini çeşitli proseslerde kullanmak mümkündür. Bu kullanılmayan atık ısı enerjisi atmosfere atılmadan önce kojenerasyonda (aynı anda güç ve buhar üretimi), trijenerasyonda (güç, sıcak su ve soğutma) ya da başka amaçlarla kullanılması ile verim artışı sağlanabileceği gibi maliyet düşüşleri ve yakıttan tasarrufta sağlanabilir. Gaz türbinli rekuperatörlü güç çevrimlerine buharlı ya da organik Rankine çevrimi ekleyerek gaz türbininden çıkan egzoz gazının ısısından buhar türbini vasıtası ile tekrar güç elde etmek mümkündür. Kombine çevrim denilen bu çevrimlerin hesabı için Fortran dilinde bir program yazılarak Termodinamiğin 1. ve 2. kanunu ile ekserji analizi metotları uygulanmıştır. Elde edilen sonuçlar da Literatürdeki çalışmalarla karşılaştırılarak tartışılmıştır. Gaz türbinli rekuperatörlü güç çevrimi ile gaz türbinli rekuperatörlü kombine çevrimin değişik hava fazlalık katsayılarına ve değişik kompresör sıkıştırma oranlarına göre güç değişimi, ekserji verimi ve diğer performans özellikleri değişimleri karşılaştırılmış ve avantajları gösterilmiştir. Ekonomik ve maliyet analizleri yapılmadan her iki çevrimin birim güç için harcanan yakıt değerleri ve performanstaki artışlar hesaplamıştır. Optimum performans değerleri için çalışılması gereken hava fazlalık katsayısı ile kompresör sıkıştırma oranları elde edilmiştir.