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Can Vitamin D reduce the need for SSRI by modulating serotonin synthesis? : a review of recent literature
(Springer Nature, 2025) Bostan, Zekiye Zeynep; Bulut, Melike Sare; Gezmen Karadağ, Makbule
Purpose of Review: This study aims to analyze the effects of vitamin D on serotonin synthesis, release, and function in the brain, and to explore its relationship with various psychiatric disorders. Recent Findings: The hormone calcitriol plays a vital role in regulating a multitude of biological processes within the human body. Its deficiency can lead to significant adverse effects on overall health and well-being, including physical and psychological consequences. Evidence indicates that vitamin D may exert influences through receptors in the brain, modulating serotonin production and influencing emotional and cognitive processes. Recent studies propose that elevated serum vitamin D may enhance mood and alleviate depressive states. The impact of vitamin D on cognitive function and behavior remains an area of ongoing investigation. This literature review analyses the available evidence on how vitamin D intake impacts the severity of illness and medication requirements in diverse psychiatric disorders. A review of the literature suggests that there may be a correlation between vitamin D and serotonin, which could potentially contribute to more favorable outcomes in the context of illness. Vitamin D may increase the amount of serotonin in the synaptic gap, which is the intended use of selective serotonin reuptake inhibitors (SSRIs), with its effect on the increase in serotonin release. Summary: According to reports, vitamin D supplementation in conjunction with SSRI group medication provides an additive effect for the management of psychiatric disorders.
Thermodynamics analyses of ionic GO plus MXene/EG plus water hybrid nanofluid in a circular tube including a novelty vortex generator
(Elsevier Science SA, 2025) Gürsoy, Emrehan; Gürdal, Mehmet; Yıldırım, Furkan
This research explores the thermo-hydraulic efficiency and entropy generation characteristics of an innovative hybrid nanofluid (GO+MXene/EG+water) flowing through a circular tube, enhanced by a novel vortex generator incorporating dimpled fins with spherical, elliptical, and trapeze geometries placed on wave tapes. The vortex generators effectively disrupted boundary layers, thereby improving thermal performance across all configurations. The novelty of this research lies in the first-time examination of MXene-based hybrid nanofluids in conjunction with vortex generators to assess thermo-hydraulic performance and entropy generation. Due to its excellent thermal conductivity and stability, the hybrid nanofluid was studied under laminar flow conditions, with Reynolds numbers ranging from 500 to 2000. The findings reveal that the GO+MXene/EG+water hybrid nanofluid enhances the convective heat transfer coefficient by 20.32% while increasing the pressure drop by 25.85% compared to the base fluid. Besides, GO+MXene/EG+water hybrid nanofluid reduced the thermal entropy generation at the rate of 60.6%. Among the studied fin geometries, spherical dimpled fins demonstrated the highest heat transfer improvement, with a normalized heat transfer ratio of 1.02, whereas trapeze fins exhibited relatively lower enhancement. This research contributes to the scientific community by providing valuable insights into the optimization of heat exchangers and other industrial thermal systems, facilitating enhanced heat transfer with reduced entropy generation. The study's findings have significant implications for future investigations on the integration of hybrid nanofluids and extended surface heat transfer enhancement techniques. Notably, the results offer a foundation for the development of novel designs that leverage hybrid nanofluids to improve energy efficiency in industrial systems.
The effect of internet addiction on surgical nurses' malpractice tendencies: Turkish sample
(Springer Nature, 2025) Gezginci Akpınar, Elif; Orhan, Büşra Nur; Göktaş, Sonay
Background This study aimed to determine the effect of surgical nurses' internet addiction on their malpractice tendencies. Methods The descriptive cross-sectional study included 1051 nurses working in the surgical awards of 10 hospitals in Istanbul. Data were collected using a descriptive characteristics form, the Internet Addiction Scale, and the Malpractice Tendency Scale. An increase in the score on the internet addiction scale indicates that internet addiction increases. In contrast, an increase in the score on the malpractice tendency scale indicates that malpractice tendency decreases. Data were analyzed using independent groups t-test, one-way ANOVA test, Pearson correlation and linear regression analyzes with IBM SPSS Statistics version 22.0 software. Results A weak negative correlation was found between the surgical nurses' total scores on the Internet Addiction Scale and Malpractice Tendency Scale (r=-0.422 p < 0.001). Internet addiction total score was also negatively correlated with malpractice tendency subscale scores for medication and transfusion administration safety (r=-0.450 p < 0.001); infection prevention (r=-0.416 p < 0.001); patient monitoring, device, and material safety (r=-0.321 p < 0.001); fall prevention (r=-0.325 p < 0.001), and communication (r=-0.332 p <= 0.001). In linear regression analysis, an increase in internet addiction overall and in the lack of control subscale was associated with greater malpractice tendency (ss=-0.422 and ss=-0.243, respectively). Internet addiction explained a total of 17.7% of the total change in malpractice tendency (R2 = 0.177). Conclusion Surgical nurses showed increased malpractice tendency as their internet addiction level increased. This relationship was seen in all domains of malpractice, including medication and transfusion administration safety, infection and fall prevention, communication, and patient monitoring, device, and material safety. It is recommended that in-service training be planned for conscious internet use to limit the time nurses spend on the internet during working hours.
Structural and electrical properties of CuO-doped NaNbO3 ceramics
(Walter de Gruyter GmbH, 2025) Berksoy Yavuz, Ayşe; Danışman, Murat
Ceramics are one of the key materials of today’s industry. The manufacturing technique used for preparing the ceramics greatly affects the material’s structural and electrical properties. Therefore, the elements and their distribution in the material as well as understanding their relation with the manufacturing process are the key factors for managing the expected outcome. In this study, NaNbO3 ceramics and the effect of CuO-doping in solid state calcination process was investigated. For this purpose pure, 0.5 mol.% and 1.0 mol.% CuO-doped sample discs were prepared. Crystallite size, strain, atomic structure, lattice parameters and atomic occupancies of the material were calculated by using X-ray diffraction patterns combined with Rietveld analysis. Additionally, the samples were investigated with the scanning electron microscopy technique to observe the effect of CuO doping. For electrical characterization, dielectric constant and tangent loss measurements were carried out on samples. As a result, it was concluded that CuO doping affected the crystal structure of the NaNbO3 which triggered the changes in its electrical behavior. The observed effects were more pronounced at 1.0 mol.% CuO content.
The acute effects of motor imagery combined with action observation breathing exercise on cardiorespiratory responses, brain activity, and cognition: a randomized, controlled trial
(Wiley-Hindawi, 2025) Atak, Ebrar; Ataç, Amine
Breath and brain activity have been integral to daily life since time immemorial. Cognition and cardiorespiratory responses are closely interlinked, necessitating further investigation into their dynamics. The potential benefits of combining motor imagery (MI) and action observation (AO) based breathing exercises in rehabilitation have not been fully explored. This study was aimed at assessing the acute effects of MI combined with AO on cognitive function and cardiorespiratory responses. Thirty-three healthy adults were randomized into MI combined with AO breathing (MI+AO), active respiratory exercise (ARE), and control groups, with equal distribution across groups. Electroencephalography (EEG) data were collected using a Muse EEG headband, and cognitive function was assessed using the Montreal Cognitive Assessment (MoCA) while imagining activities were measured via the Kinesthetic and Visual Imagery Questionnaire (KVIQ). Significant improvements in the Timed Up and Go (TUG) test and systolic blood pressure were observed in the ARE group (p < 0.05), alongside improvements in MoCA and KVIQ scores (p < 0.05). EEG data revealed significant decreases in delta and theta power at the temporoparietal (TP) location in the ARE group (p < 0.05). These findings suggest that MI and AO, when combined with respiratory exercises, may serve as effective passive strategies to support cognition and cardiorespiratory function, particularly in individuals who struggle to actively participate in pulmonary rehabilitation.
Lactate kinetics and fatigue dynamics in elite taekwondo athletes during a 30-second continuous jump protocol
(Projack, 2025) Kaya, Mehmet Zeki; Shahidi, Seyed Houtan
Background: This study examines lactate kinetics and performance declines during a 30- second BOSCO jump protocol in elite Taekwondo athletes, providing insights into anaerobic performance and recovery. Methods: Anthropometric data, including age, height, and weight, were collected, with averages of 21.2 years (+/- 2.0), 181.4 cm (+/- 4.8), and 70.6 kg (+/- 4.3). Fatigue-induced changes were assessed by measuring jump heights, contact times, and power outputs using the Witty Jump Mat (Italy) during the first and last 5 seconds of the protocol. Blood lactate concentrations were measured with the Lactate Scout 4 (Germany) at baseline, immediately postexercise, and at 3, 6, and 9 minutes post-exercise. Results: Significant declines were observed in jump height (mean decrease = 13%, p = 0.01) and power output (mean decrease = 15%, p = 0.02), alongside an increase in contact time (mean increase = 18%, p = 0.03), reflecting the impact of fatigue on explosive performance. Athlete B showed the greatest reduction in jump height (31.36%), revealing notable inter-individual variability in fatigue resilience. Blood lactate levels increased significantly from baseline (mean = 0.78 +/- 0.08 mmol/L) to peak post-exercise (mean = 3.16 +/- 1.19 mmol/L, p < 0.001) and subsequently declined. Lactate clearance rates were calculated as 40.5% at 3 minutes, 60.5% at 6 minutes, and 65.5% at 9 minutes post-exercise. Athlete D exhibited the fastest clearance rate (72%, p = 0.02), while Athlete C demonstrated delayed recovery. Conclusions: The findings underscore the need for tailored conditioning programs to optimize anaerobic performance and recovery in Taekwondo athletes. Future research should explore the effects of targeted training on anaerobic capacity and competition readiness in combat sports.
Search for central exclusive production of top quark pairs in proton-proton collisions at √s=13 TeV with tagged protons
(Springer, 2024) Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.
A search for the central exclusive production of top quark-antiquark pairs (t (t) over bar) is performed for the first time using proton-tagged events in proton-proton collisions at the LHC at a centre-of-mass energy of 13TeV. The data correspond to an integrated luminosity of 29.4 fb(-1). The t (t) over bar decay products are reconstructed using the central CMS detector, while forward protons are measured in the CMS-TOTEM precision proton spectrometer. An observed (expected) upper bound on the production cross section of 0.59 (1.14) pb is set at 95% confidence level, for collisions of protons with fractional momentum losses between 2 and 20%.
Non-invasive Raman and XRF study of Mīnā’ī decoration, the first sophisticated painted enamels
(Multidisciplinary Digital Publishing Institute (MDPI), 2025) Colomban, Philippe; Şimşek Franci, Gülsu; Ngo, Anh-Tu; Gallet, Xavier
Mīnā’ī wares, crafted during the 12th–13th centuries, represent some of the earliest examples of sophisticated painted enamel decoration by potters. Due to the thinness of these enamel layers, their detailed characterization remains challenging, even with the use of advanced techniques, such as Proton-Induced X-ray Emission (PIXE) analysis and Rutherford Backscattering Spectrometry (RBS). This study provides the first combined non-invasive analysis, using X-ray fluorescence (XRF) and Raman spectroscopy, of five shards attributed to mīnā’ī wares. For comparison, two İznik shards from the 17th century, which feature similarly styled but thicker enamel decorations, were also analyzed. Interestingly, the mīnā’ī paste was found to contain lead and tin, suggesting the use of a lead-rich frit in its composition. This finding was confirmed through micro-destructive analysis, using Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM–EDS). Elements, such as rubidium (Rb), strontium (Sr), yttrium (Y), and zirconium (Zr), produced significant XRF signals and effectively distinguished mīnā’ī wares from İznik wares. A uniform tin-rich glaze, measuring 300–500 µm in thickness, was used as a base layer for the much thinner painted mīnā’ī enamels. The colored areas (blue, turquoise, red, green, black, white, eggplant) revealed the presence of various coloring agents and phases, such as spinels, chromite, and ions like Cu2+ and Co2+, as well as opacifiers like cassiterite and lead–calcium/potassium arsenates. Two distinct cobalt sources were identified: one associated with arsenic and the other with manganese and nickel. These cobalt sources are comparable to those used in İznik pottery. For the first time, boron was detected in the blue enamel of mīnā’ī wares.
Investigation of inspiratory muscle training efficiency before bronchoscopic lung volume reduction: a randomized controlled trial
(Sociedad Espanola de Neumologia y Cirugia Toracica (SEPAR), 2025) Pehlivan, Esra; Çetinkaya, Erdoğan; Özcan, Zeynep Betül; Karaahmetoğlu, Fulya Senem; Çörtük, Mustafa; Ataç, Amine; Çınarka, Halit
Introduction: Pulmonary rehabilitation (PR) is recommended prior to bronchoscopic lung volume reduction (BLVR) procedures to optimize patient outcomes. However, there's a lack of clear guidance on PR content. The aim of our study is to examine the effect of adding inspiratory muscle training (IMT) to standard PR before BLVR on exercise capacity, dyspnea, fatigue level and quality of life. Methods: Sixty-four patients were randomly assigned to either the PR Group (PRGr) or the PR with IMT group (IMTGr). Both groups underwent an 8-week standard PR program, including breathing exercises, muscle strengthening, and walking. Additionally, IMTGr received IMT sessions. Outcome measures comprised six-minute walking distance (6MWD), maximal inspiratory and expiratory pressures (MIP, MEP), peripheral muscle strength, modified Medical Research Council dyspnea score, fatigue symptom scale, spirometric parameters, Saint George Quality of Life Questionnaire (SGRQ), International Physical Activity Questionnaire Short Form (IPAQ-SF), and Hospital Anxiety and Depression Scale. Results: Our study found no significant difference in exercise capacity improvement between IMTGr and PRGr. However, IMTGr showed significant improvement in MIP compared to PRGr. Both groups experienced improvements in dyspnea, fatigue, and depression scores, as well as enhancements in 6MWD, MEP, peripheral muscle strength, IPAQ-SF and SGRQ scores. Conclusion: Adding IMT to PR did not show a significant difference between groups among BLVR-eligible patients. However, improved respiratory muscle strength may have positive clinical implications. Further research is needed to explore short and long-term effects.
Does the use of protective face masks affectemporomandibular joint function?
(Professional Medical Publications, 2025) Özdemir Görgü, Sena; Yıldırım, Yasin; Kaya, Pınar; Ergezen, Gizem; Uzuner, Eda
Objective: Long-term mask use can trigger or exacerbate various health issues. This prospective experimental study evaluated the impact of protective face masks on masseter muscle activity and temporomandibular joint (TMJ) function reported by participants. Methods: This prospective, experimental tudy was conducted to investigate the effect of face masks on TMJ function, we used surface electromyography to assess masseter muscle activity at rest, during maximum contraction of the masseter muscle, and while reading a text. We also evaluated the intensity of the masseter muscle pain using an algometer. The participants underwent these evaluations at the Istanbul Medipol University between July and October 2022. Results: The study included 24 female participants with an average age of 28.5±5.40 years. After at least five hours of daily N95 mask use, a significant increase in masseter muscle activity was observed at rest and during speech (p=0.01; p=0.04, respectively). However, no significant changes in the maximum contraction of masseter muscle or pain threshold were observed (p>0.05). Conclusion: This study found that the use of N95 mask is associated with restricted TMJ movements and discomfort, and an increase in its use is associated with restricted TMJ movements, discomfort, and increased masseter muscle activity. Questions regarding mask-wearing-related habits should be included in the routine lifestyle assessment of patients who report TMJ complaints.
Relationship between nutritional literacy and healthy life skills of university students
(John Wiley and Sons Inc, 2025) Karadağ, Gülendam; Bilgiç, Dilek; Öztürk, Nuray; Özdemir, Tuğba
Health literacy is important for maintaining healthy diets and lifestyles. This study examined the relationship between nutrition literacy and healthy life skills of university students. This study was a descriptive and correlational design. The students' Food and Nutrition Literacy Scale knowledge sub-dimension mean score was found to be 10.30 +/- 2.11, at the limited knowledge level, the attitude sub-dimension mean score was 49.32 +/- 7.26, at the limited attitude level, and the behaviour sub-dimension mean score was 31.04 +/- 5.71, at the limited level. The mean Scale of Healthy Life Skills in University Students score of the university students was 62.96 +/- 9.99, at a moderate level. Multiple regression analysis showed that the mean scores obtained from the attitude and behaviour sub-dimensions, studying in the Faculty of Nursing, being 18 years old, and studying in the first or second year were the main variables influencing the healthy life skills of university students. The food and nutrition literacy of the students was limited and their healthy life skills were at a moderate level. As the food and nutrition literacy of the students increased, their healthy life skills became more positive.
Anıt tasarım dili kuruluşunda temsilin aracı olarak biçim ve biçimsel örgütlenme düzeni
(Anadolu Üniversitesi, 2024) Kolbay, Sevda Duygu
Anıtlar, ontolojik açıdan sanat ve mimarlık disiplininin arakesitinde yer almaktadır. Bir tasar ürünü olarak anıt oluşumunda, öncelikli beklenti, doğrudan veya örtük yollarla anlamın aktarımıdır. Anıt ve anma temalı tasarım yarışmaları bu arayışın ön plana çıktığı fikir üretim süreçleridir. Nesnenin biçimlendirilişi, anlamın üretimi için etkin bir yol oluşturur. Manifestolarla yapılandırılan içerik biçim ile bağlama tutunur. Tasarımcı ile gözlemci arasındaki iletişim, imgelerin kolektif hafızadaki temsilleri üzerinden sağlanmaktadır. Çalışma kapsamında, yarışma projelerinde söylem üretme çabasında biçimi örgütleyen görece değişkenlerin tasarım dili üzerindeki etkisini ve biçim ile temsilde betimlenebilecek karşılığı araştırmak hedeflenmiştir. Bu doğrultuda, anıt ve anma temalı yarışma süreçlerinde sunulan fikir projesi önerileri üzerinden anlambilimsel çözümleme gerçekleştirilmiştir. İncelenecek örneklerin seçimi için, tasarımcının aynı oluşu, tasarımda benzer asal geometrilerin yer alışı bir ölçüt olarak kabul edilerek, biçim organizasyonlarında öğenin bağlamı içindeki yeri araştırılmıştır. Yazar tarafından, tasarım dili küp ve koni tabanlı biçimsel öğeler kullanılarak benzer yaklaşımla geliştirilmiş, İstanbul’un Mezarları Yarışması/Lefter Küçükandonyadis Anıt Mezarı, 1.Ödülü (2020) ve Kaş’ın Kahramanları Anıtı Yarışması/ Mustafa Ertuğrul Aker ve Yusuf Ziya Erdil Anıtı, Eşdeğer Ödülü (2021) ve Efeler Belediyesi 100. Yıl Anıtı Önerisi (2023) anlambilimsel açılımında temsilin biçim ve biçimsel örgütlenme düzenine dayalı kökleri aranmıştır. Anımsatma değerinin, yapım nedeninin, yapılı çevre özelliklerinin farklılaştığı koşullarda, asal geometrilerden türetilebilecek benzer biçimsel öğelerin bağlam içinde kazanabileceği farklı temsiller irdelenmiştir. Tasarım dilinin kodlanışı ve örüntü dizgelerinin algıdaki yansımaları biçim grameri açılımında tartışılmıştır. Elde edilen çıkarımlar, anlamın, nesnenin biçimi ile olduğu kadar bütündeki kurgusu üzerinden nasıl yakalanabildiğine yönelik imgesel referanslar sunmaktadır.
Developing a xenophobia scale for healthcare workers in Türkiye
(Chiang Mai University, 2025) Karagöz, Yalçın; Karaşin, Yusuf; Filiz, Mustafa; Genç, Gülşen
T his study proposes a psychometric measurement tool to determine the level of xenophobia among healthcare workers. To this end, 312 healthcare workers serving in Istanbul were reached through convenience sampling and data was generated through face-to-face interviews. A preliminary scale comprising 33 items was initially created. Following expert opinions and pilot study phases, six items were removed from the draft scale, leaving 27 items. Exploratory factor analysis was initially applied to the data, resulting in the removal of nine more items from the scale, thus reducing the number of items to a final scale of 18. The final scale was grouped into three factors: "General Xenophobia," "Occupational Xenophobia," and "Cultural Xenophobia." The items obtained following exploratory factor analysis were subjected to confirmatory factor analysis. The analysis demonstrated that the model obtained fits the data perfectly. The Cronbach's alpha value for the developed scale was found to be 0.905. In conclusion, the developed scale was found to be a valid and reliable measurement tool for the measurement of xenophobic attitudes among healthcare workers.
Efficacy of ursodeoxycholic acid in reducing the necessity of cholecystectomy due to pre-existing and subsequently formed gallstones in patients who underwent laparoscopic sleeve gastrectomy
(BMC, 2025) Demirpolat, Muhammed Taha; Çelikkaya, Muhammet Oğuz; Ertekin, Süleyman Çağlar; Başak, Fatih; Şişik, Abdullah
BackgroundIn this study, we aimed to investigate whether ursodeoxycholic acid (UDCA) would reduce the necessity of cholecystectomy in patients diagnosed with asymptomatic gallstones after laparoscopic sleeve gastrectomy (LSG) and in patients diagnosed with asymptomatic gallstones before LSG.MethodsBetween July 2020 and November 2022, at least 2-year follow-ups of patients who underwent LSG for obesity were retrospectively analyzed. Patients with pre-existing asymptomatic gallstones during preoperative evaluation, those with UDCA treatment (group 1), and observation group (group 2). Patients with newly formed gallstones in postoperative outpatient clinic follow-up, those with UDCA treatment (group A), and those without UDCA treatment (group B).ResultsA total of 425 patients included. At the end of the first year, patients who had newly formed gallstones after LSG had a higher total weight loss percentages (TWL%) (39.8 +/- 6.1) compared to those who did not develop gallstones (37.9 +/- 7.4), which were statistically significant (p = 0.004). Among patients who developed gallstones postoperatively, UDCA treatment was associated with a significantly lower cholecystectomy rate in patients with newly formed gallstones postoperatively (p = 0.025), while no significant difference was shown in patients with preoperative gallstones (p = 0.631).ConclusionUDCA is a promising option for reducing the need for cholecystectomy in patients with post-LSG gallstones, but it appears ineffective for pre-existing gallstones.
Search for new physics in the lepton plus missing transverse momentum final state in proton-proton collisions at √s=13 TeV
(Springer, 2022) Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Dragicevic, M.; del Valle, A. Escalante
A search for physics beyond the standard model (SM) in final states with an electron or muon and missing transverse momentum is presented. The analysis uses data from proton-proton collisions at a centre-of-mass energy of 13 TeV, collected with the CMS detector at the LHC in 2016-2018 and corresponding to an integrated luminosity of 138 fb(-1). No significant deviation from the SM prediction is observed. Model-independent limits are set on the production cross section of W' bosons decaying into lepton-plus-neutrino final states. Within the framework of the sequential standard model, with the combined results from the electron and muon decay channels a W' boson with mass less than 5.7 TeV is excluded at 95% confidence level. Results on a SM precision test, the determination of the oblique electroweak W parameter, are presented using LHC data for the first time. These results together with those from the direct W' resonance search are used to extend existing constraints on composite Higgs scenarios. This is the first experimental exclusion on compositeness parameters using results from LHC data other than Higgs boson measurements.
Free volume impact on ionic conductivity of PVdF/GO/PVP solid polymer electrolytes via positron annihilation approach
(Elsevier Ltd, 2025) Yılmazoğlu, Mesut; Okkay, Hikmet; Abacı, Ufuk; Tekay, Emre; Çoban, Ozan; Veziroğlu, Sümeyye; Yumak Yahşi, Ayşe; Tav, Cumali; Yahşi, Uğur
This study reports the effects of free volume (FV) profiles on the ionic conductivities of PVdF/GO/PVP ternary polymer electrolytes using positron annihilation lifetime spectroscopy (PALS). The electrolytes were characterized by various tests such as FTIR, XRD, TGA-DTG, SEM, contact angle and DMA. FV profiles were evaluated by o-Ps lifetime (τ₃), intensity (I3) and FV fractions (fυ). PVdF exhibits a proton conductivity of 2.1 × 10⁻5 S/m at 80 °C. However, the introduction of GO leads to a decrease in conductivity, with PVdF/GO showing 1.7 × 10⁻5 S/m at 80 °C. The presence of PVP in PVdF/GO/PVP10 and PVdF/GO/PVP30 creates new FV spaces via hydrogen bonds and intermolecular interactions, expanding hydrophobic areas and increasing I₃ values. PVP's high mobility and positive charge density reduce the τ₃ values. In contrast, I₃ and fυ values decrease in PVdF/GO/PVP50, accompanied by a significant drop in τ₃ values and the proton conductivity and dielectric constant peak at 6.1 × 10⁻2 S/m and 77.38, respectively. High PVP concentration may enhance interactions within the polymer matrix, forming a dense structure that, despite reduced FV, maintains or enhances proton mobility through alternative conduction pathways and increased polarization. This study emphasizes the balance of FV and dielectric behavior for efficient electrochemical processes.
Human side of strategic alliances, cooperations and manoeuvrings during recession and crisis
(Springer, 2017) Uslu, Tuna
Together with the globalizing economy, it is no more possible for any system to survive by ignoring the market changes and transformations. A change taking place anyhow in any place of the world triggers complex processes and affects everyone by growing in waves. Successful ways of business conduct of today is based on predicting the growth speed of these waves and on the ability to carry out strategic cooperations and manoeuvres accordingly. Sometimes these fluctuations also trigger serious crises. Apart from the shocks created in organizational structures, periods of crisis have complex effects on people. Some people approach to these events in hesitation, while other people or organizations happen to have skills to turn these processes into opportunity. The practical examples show that the organizations that adapt to new condition by getting simpler and getting rid of burdens in the constriction process are able to come out in a better condition before the crisis. This section discusses the way of organizations to become human oriented when acting strategically during strategic alliances, cooperations and manoeuvrings.
Geodesic path planning characteristics of the reconfigurable 1-S robot workspaces for hyperbolic, elliptical, and Euclidean geometries
(Polska Akademia Nauk, 2024) Şahin, Haydar
The path-planning strategies are implemented by establishing the Riemann curvature tensor and geodesic equations of the 1-S robot workspace. This paper’s originality lies in formulation of the parametric 1-S robot workspace for path planning, which is based on the differential geometry of the geodesic and Riemann curvature equations. The novel results in defining the path plan with diffeomorphic and expandable trajectories with zero and negative sectional curvatures are encouraging, as shown in the research article’s result sections. The constant negative, constant positive, and zero sectional curvatures produce hyperbolic, elliptical, and Euclidean geometries. The workspace equation, derived using Lie algebra, defines the parameters of u12, u3, and u4 to obtain the shortest distances in path planning. The geodesic equations determine the shortest distances in the context of Riemann curvature tensor equations. These parameters from the workspace equation (α1, α2, θ1, r1) are used in the geodesic and Riemann curvature tensor equations. The results show that one needs to choose the most convenient parameters of the mechanism for path-planning capabilities. Both the topology of the mechanism, which is 1-S herein and the parameters of the workspaces should be selected for the pre-defined trajectories of the path planning, as shown in the results. The reconfigurable robots have many mechanism topologies to transform.
Redefining endurance testing in soccer: the reliability and impact of a ball-integrated yo-yo intermittent recovery test
(Campus Educa Sportis S.L., 2025) Yılmaz, Levent; Shahidi, Seyed Houtan
The Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo) is a widely recognized method for assessing aerobic capacity in soccer players. Despite its utility, the test does not incorporate ball manipulation, which is a critical component of soccer-specific endurance. This study aimed to evaluate the reliability of a modified soccer-specific Yo-Yo test (MYo-Yo) that includes ball dribbling, passing, and control, and to compare the physiological responses with those from the conventional Yo-Yo test. Twenty elite male soccer players (mean ± SD: age, 16.4 ± 1 years; height, 173 ± 7 cm; body mass, 65.7 ± 10.4 kg) completed both Yo-Yo tests, with and without ball manipulation. Performance metrics included the number of completed shuttles (Level), total distance covered (Distance; m), and blood lactate concentration (Lactate; mmol/L), while maximal oxygen consumption (V̇ O2 max; ml/min/kg) was estimated for all trials. The modified Yo-Yo test (MYo-Yo) demonstrated high reliability, with Intraclass Correlation Coefficients (ICC) of 0.802 for Level, 0.982 for Distance, 0.997 for V̇ O2 max, and 0.992 for Lactate (P ≤ 0.001). Comparatively, the MYo-Yo test resulted in significantly lower distances than the standard Yo-Yo test (832 vs. 1520 m, respectively; P < 0.001) and lower lactate concentrations (5.2 vs. 10.9 mmol/L; P < 0.001). No significant correlations were found between the two tests for outcomes (P > 0.05). In summary, integrating ball manipulation in the MYo-Yo test introduces distinct physical and technical demands that influence overall performance. The MYo-Yo test offers a reliable alternative for assessing soccer-specific endurance, better replicating the physical demands encountered during a soccer match.
K0S and Λ((Λ)over-bar) two-particle femtoscopic correlations in PbPb collisions at √sNN=5.02 TeV
(Elsevier B.V., 2024) Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; del Valle, A. Escalante
Two-particle correlations are presented for KS0, [Formula presented], and [Formula presented] strange hadrons as a function of relative momentum in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The dataset corresponds to an integrated luminosity of 0.607nb−1 and was collected using the CMS detector at the CERN LHC. These correlations are sensitive to quantum statistics and to final-state interactions between the particles. The source size extracted from the KS0KS0 correlations is found to decrease from 4.6 to 1.6 fm in going from central to peripheral collisions. Strong interaction scattering parameters (i.e., scattering length and effective range) are determined from the [Formula presented] and [Formula presented] (including their charge conjugates) correlations using the Lednický–Lyuboshitz model and are compared to theoretical and other experimental results.

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