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Toxic leadership behavior in healthcare professionals a study to determine its impact on organizational silence
No full textBu çalışmada, sağlık çalışanlarının toksik liderlik algılarının örgütsel sessizlik durumları üzerindeki etkisini belirlemek amacıyla öncelikle toksik liderlik ve örgütsel sessizlik değişkenleri ile ilgili literatür çalışmasına, devamında değişkenlerin birbirleri ile olan ilişkilerine yönelik yapılan ampirik araştırmaya yer verilmiştir. Kolayda örnekleme yöntemi kullanılarak İstanbul ili kamu hastanelerindeki 400 sağlık çalışanı ile yapılan çalışmada, veri toplama aracı olarak toksik liderliği ve örgütsel sessizliği belirleyen ölçekler ile kişisel veri formu kullanılmıştır. Değişkenler arasındaki ilişkiye yönelik hipotezlerin test edilmesi amacıyla korelasyon ve regresyon analizlerinden faydalanılarak yapılan çalışmada, sağlık çalışanlarının yöneticilerine yönelik toksik liderlik algısına sahip olmalarının, onların örgütsel sessizlik durumları üzerinde belirleyici ve açıklayıcı bir etkisinin olduğu tespit edilmiştir. Ayrıca analizler sonucunda toksik liderlik ölçeğinin değer bilmezlik alt boyutunun kabullenici, fırsatçı, örgüt yararına ve pasif sessizlik alt boyutları üzerinde pozitif yönde anlamlı etkilerinin olduğu belirlenmiştir.In this study, the literature review on the variables of toxic leadership and organizational silence is first included, followed by empirical research on the relationships between the variables to determine the effect of healthcare professionals' perceptions of toxic leadership on organizational silence. A survey with the scales of toxic leadership and organizational silence and personal data questions was conducted on 400 healthcare professionals in Istanbul's public hospitals using the convenience sampling method. The study, which tested the hypotheses regarding the relationship between the variables using correlation and regression analyzes, showed that the toxic leadership perception of health professionals towards their managers had a decisive and explanatory effect on their organizational silence. As another result of the analyzes, it was determined that the ignorance sub-dimension of the toxic leadership scale had positive and significant effects on the accepting, opportunistic, organizational benefit and passive silence sub-dimensions
Thiolated layered double hydroxide-based nanoparticles: A study on mucoadhesiveness and cytotoxicity
No full textThe aim of this study was the synthesis and characterization of thiolated Mg/Al Layered double hydroxide nanoparticles (nLDH) that can adhere to mucosal surfaces. For this purpose, initially, nLDH were synthesized and then their surface was modified with L-cysteine (Cys). Then the Cys-modified nanoparticle structure (nLDHCys) Cys ) was characterized by FTIR, XRD and FE-SEM/EDS, and the amount of thiol groups was determined using the iodometric method. The cytotoxicity properties of nLDH and LDHCys Cys were examined on cervical (HeLa), fibroblast (L929) and colon (HT29) cell lines. In addition, the adhesion of nanoparticles to mucosal surfaces has been evaluated through mucin interaction experiments and ex vivo tests on ewe vaginal tissue. The results from characterization studies prove that Cys molecule has been successfully modified on the surface of nLDH. Cytotoxicity studies demonstrated that Cys modification did not negatively affect the cell viability, and these results were extremely close to those of nLDH. Ex vivo tests on ewe vaginal tissue and mucin interaction demonstrated that nLDHCys Cys enhanced retention on the mucosal surface. Considering their retention ability to mucosal surface and their biocompatible nature, nLDHCys Cys is expected to play an important role as a promising option for a safe mucoadhesive nanoparticle system for biological applications in the future.Presidency of Turkey, Presidency of Strategy and Budget [DPT-2019K12-149071]This research supported with DPT-2019K12-149071 project by Presidency of Turkey, Presidency of Strategy and Budget
The Effect of Ru/PMC Hydrogel Composite for Water-Splitting Applications
No full textHerein, poly(methacrylic acid) (PMAA) and PMAA-g-carbon nanotube (CNT) (PMC) hydrogel composites were prepared using the redox polymerization method. PMAA and PMC hydrogel composites were coated with the Ru metal electrochemical deposition method to be used as electrocatalysts in water-splitting applications. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) and mapping, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) techniques were used to characterize the hydrogel composites. The electrochemical properties of these hydrogel composites were examined using techniques including linear sweep voltammetry (LSV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) measurements. The activities of hydrogel composites against both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) were examined for water-splitting applications. The electrochemical results indicated that the Ru/PMC hydrogel composite exhibited high catalytic activity for both OER and HER in alkaline media
Three-dimensional optical microrobot orientation estimation and tracking using deep learning
No full textOptical microrobots are activated by a laser in a liquid medium using optical tweezers. To create visual control loops for robotic automation, this work describes a deep learning-based method for orientation estimation of optical microrobots, focusing on detecting 3-D rotational movements and localizing microrobots and trapping points (TPs). We integrated and fine-tuned You Only Look Once (YOLOv7) and Deep Simple Online Real-time Tracking (DeepSORT) algorithms, improving microrobot and TP detection accuracy by 3 degrees'c and 11 degrees'c, respectively, at the 0.95 Intersection over Union (IoU) threshold in our test set. Additionally, it increased mean average precision (mAP) by 3 degrees'c at the 0.5:0.95 IoU threshold during training. Our results showed a 99 degrees'c success rate in trapping events with no false-positive detection. We introduced a model that employs EfficientNet as a feature extractor combined with custom convolutional neural networks (CNNs) and feature fusion layers. To demonstrate its generalization ability, we evaluated the model on an independent in-house dataset comprising 4,757 image frames, where micro- robots executed simultaneous rotations across all three axes. Our method provided mean rotation angle errors of 1.871 degrees, 2.308 degrees, and 2.808 degrees for X (yaw), Y (roll), and Z (pitch) axes, respectively. Compared to pre-trained models, our model provided the lowest error in the Y and Z axes while offering competitive results for X-axis. Finally, we demonstrated the explainability and transparency of the model's decision-making process. Our work contributes to the field of microrobotics by providing an efficient 3-axis orientation estimation pipeline, with a clear focus on automation.French National Research Agency Grants OPTOBOTS [ANR-21-CE33-0003]This work was funded through French National Research Agency Grants OPTOBOTS (ANR-21-CE33-0003)
Comparison of Canopy-Vegetation Parameters from Interior Parts to Edge of Multi-Story Grove Forest Patch and Meadow Field Within Rural Landscape for Soil Temperature and Moisture
No full textSoil temperature and soil moisture are significant interactive parameters that influence many ecological and hydrological processes within forest ecosystems. Furthermore, they are affected by the above canopy characteristics, which determine the amount of sunlight penetration. These canopy characteristics spatially vary within isolated or narrowed forest patches, which include interior parts and edges. On the other hand, forest patches display different effects on the soil temperature and moisture than agricultural meadows within rural landscapes. This study aimed to analyze and evaluate the influences of interior-edge canopies and meadow cover on soil temperature and moisture. Hence, the mutual responses of canopy phenology and physiology, along with the soil temperature and moisture beneath, were analyzed and determined on a temporal basis throughout one year. For this purpose, the air-soil temperature and precipitation data of close meteorological stations were utilized. In addition, soil temperature and moisture parameters were analyzed using an on-site measuring device. Furthermore, canopy parameters-namely LAI, LT, CO, and GF-were determined using a hemispherical photographing procedure and image processing-analysis methodology. Moreover, the LAI of the meadow cover was determined using an on-site analysis device. The maximum LAI, with mean values of 3.69 m2 m-2 and 2.54 m2 m-2, occurred in late May (DOY: 142) within the forest canopies of the interior parts and the patch edge, respectively. On the other hand, the maximum LAI with a mean value of 2.77 m2 m-2 occurred again in late May within the meadow field. On the contrary, during the same period, the lowest percentages were observed for LT and CO, each at 5%, and for GF with 0.5% within the interior parts of the forest patch. However, their lowest percentages were 23% and 16%, respectively, within the forest patch edge. For that late May period, the mean soil temperatures were 17.2, 26.0, and 21.0 degrees C under the forest canopies of the interior parts, the patch edge, and the meadow field, respectively. Meanwhile, their mean soil moistures were 56.4%, 51.6%, and 32.9% when the mean air temperature was 16.2 degrees C. Definite correlation did not exist between the canopy-vegetation parameters and the soil temperature-moisture values for all the interior parts, for the edge of the multi-story grove forest patch, and for the meadow field. Based on the overall results of this study, there were apparent differences amongst the interior parts, the edge of the forest patch, and the meadow field in terms of both the canopy-vegetation parameters and the soil temperature-moisture values. The multi-story structure of the interior parts and the edge of the forest patch determined the temporal patterns of their canopy-vegetation parameters. This study elucidated ecology, hydrology, and therefore management of narrow forest patches between agricultural areas within rural landscapes.TUBITAK (The Scientific and Technological Research Council of Tuerkiye) [1002-A-123O787]; TUBITAKPart of this study was supported by the TUBITAK (The Scientific and Technological Research Council of Tuerkiye) with the grant number of 1002-A-123O787. The authors Hueseyin & Scedil;ensoy, & Idot;lyas Bolat, and Kamil Cak & imath;roglu have received research support from the TUBITAK
The Relationship Between School Climate and Student Self-efficacy: Evidence from High Schools
No full textThe objective of this study is to assess the school environment and the levels of self-efficacy among high school students, as well as to examine the correlation between the school environment and their views of self-efficacy. The study involved a total of 1492 high school students. The data was analyzed using MANOVA, correlation, and hierarchical regression methods. The findings suggest that students' self-efficacy judgments vary according to the sort of school they attend. Furthermore, the findings suggest that the students' impressions of their self-efficacy remained constant despite their advancing grade level. Certain sub-factors related to school climate are linked to specific sub-factors of self-efficacy, and these variables mutually predict one another. Concerning the findings, we offer recommendations about the school climate and individuals' belief in their abilities
Thermal energy storage and mechanical enhancement of cement composites containing PCM-impregnated and cement-slurry coated pumice aggregates
No full textIn the field of thermal energy management and building materials, PCM has been impregnated into aggregates and added to cement to produce composite concretes. However, challenges such as PCM leakage and poor interfacial bonding have limited their widespread application. To address these issues, this study utilized pumice aggregates with exceptional porosity, impregnated with PCM and coated with cement slurry, to develop enhanced composite concretes. The produced composites were characterized through compressive strength tests, thermal conductivity measurements, ultrasonic pulse velocity analysis, and detailed thermal regulation experiments under dynamic solar radiation. Thermal regulation experiments were conducted using thermal imaging under real-time heating and cooling processes. Results demonstrated that PCM-impregnated aggregates enhanced the thermal stability of concrete, with surface temperatures on PCM-based composites (MAL-2) being approximately 5 degrees C lower during heating compared to control samples (MAL-K). During the cooling process, MAL-2 exhibited delayed temperature reduction, stabilizing surface temperatures around 1 degrees C higher than MAL-K due to PCM's latent heat release. Experimental outcomes further presented that an increasing proportion of PCM-impregnated aggregates significantly reduced porosity from 13.55 % to 7.87 % and improved compressive strength from 12.7 MPa to 16.81 MPa. Thermal conductivity increased from 0.5706 to 0.7058 W/mK, while water absorption decreased from 13.94 % to 7.13 %. Ultrasonic pulse velocity values increased from 2.49 km/s to 2.58 km/s, indicating enhanced matrix integrity. This design, offering superior thermal regulation and mechanical performance, holds great promise for applications in energy-efficient building materials and sustainable construction practices
2. Uluslararası değişen dünyada Çeşm-i Cihan sağlık kongresi : Küresel iklim değişikliğinde sağlıklı yaşam : Sürdürülebilir çözümler, 20-21 Aralık 2024 çevrim içi kongre, bildiri özetleri e-kitabı
No full textBartın Üniversitesi Sağlık Bilimleri Fakültemiz tarafından bu yıl ikincisi düzenlenen Uluslararası Değişen Dünyada Çeşm-i Cihan Sağlık Kongresine hepiniz hoş geldiniz! Bugün, iklim değişikliği tüm dünyayı etkisi altına almış ve küresel bir sorun haline gelmiştir. Biz de tüm dünyanın karşı karşıya kaldığı bu soruna yönelik kolektif çözüm önerilerini tartışmak üzere kongremizin bu yılki ana temasını “Küresel İklim Değişikliğinde Sağlıklı Yaşam: Sürdürülebilir Çözümler” olarak belirledik. Dünyadaki nüfusun, sanayileşme ve kentleşmenin artışı, atık yönetimi, enerji üretimi ve ulaşım için fosil yakıtların kullanımı, CO2 ve metan gibi sera gazı emisyonlarının artmasına neden olmuştur. Bunun sonucu olarak küresel sıcaklık hızla artmaya başlamıştır. Yapılan çalışmalar, tüm emisyonlar hemen durdurulsa bile, küresel sıcaklığın önümüzdeki on yıl boyunca 0.2-0.5°C artmaya devam edeceğini ortaya koymuştur. İklim değişikliği ile ilişkili kuraklık, sıcak hava dalgaları, seller, şiddetli yağmurlar, fırtınalar, orman yangınları gibi aşırı hava olaylarındaki artışın, biyolojik çeşitlilikteki değişikliklerin ve göçteki artışın küresel sağlığı olumsuz şekilde etkilediğine ve etkilemeye de devam edeceğine dikkat çekilmektedir. Son yıllarda yaşadığımız pandemi ve afetler ve bunların sonuçları, iklim değişikliğinin sadece çevresel değil, aynı zamanda sağlık ve sosyal açısından da ne denli kritik olduğunu bir kez daha gözler önüne serdi. Dünya Sağlık Örgütü de, 2030 ile 2050 yılları arasında, iklim değişikliğinin dünyada sadece bulaşıcı hastalıklar ve gıda kıtlığı nedeniyle yılda yaklaşık 250.000 ek ölüme neden olacağını tahmin etmektedir. Sıcaklığa bağlı ölümlerin en azından 2050'ye kadar artması öngörülmektedir. Bu sonucun sağlık altyapısı üzerinde büyük bir stres yaratacağı, hem sağlık sisteminde hem de tedarik zincirinde önemli zorlanmalara yol açabileceği üzerinde durulmaktadır. İki gün sürecek kongremizde, sadece iklim değişikliğinin toplum üzerindeki olumsuz etkilerini konuşmayacağız. Aynı zamanda, bilimsel bir çerçevede iklim değişikliği ile mücadelede nasıl sürdürülebilir çözümler üretebileceğimizi, bireysel ve toplumsal düzeyde nasıl daha sağlıklı bir yaşam sürdürebileceğimizi tartışacağız. Çünkü bu, sadece çevremizi korumakla ilgili bir sorun olarak nitelendirilmemelidir. Bu durum, sağlıklı bir yaşam sürdürebilmek için iklimsel dengeyi sağlama zorunluluğuna dönüşmüştür. Değerli katılımcılar, sürdürülebilir çözümler, yalnızca gezegenimizin korunmasına yönelik adımlar atmakla kalmaz, aynı zamanda sağlık sistemlerimizin, gıda güvenliğimizin, su kaynaklarımızın ve yaşam alanlarımızın da sürdürülebilir olmasını sağlar. Yenilenebilir enerjiye geçiş, doğa dostu tarım yöntemleri, yeşil alanların artırılması, atık yönetimi gibi alanlarda alınacak tedbirler, gelecekteki nesillerin sağlıklı bir dünyada yaşamasına katkı sağlayacaktır. Kongremizde siz değerli katılımcılarla birlikte toplumların sağlıkla ilgili zorluklarının iklim değişikliği ile nasıl iç içe geçtiğini tartışacak, çözüm önerileri üzerinde fikir birliğine varmaya çalışacağız. Ayrıca, her birimizin bu küresel sorunun çözümüne nasıl katkı sağlayabileceğimizi de sorgulayacağız. Çünkü artık hepimiz biliyoruz ki, iklim değişikliği herkesin meselesidir. Küresel iklim değişikliği ve sağlık konusundaki farkındalığı artırmak, bilimsel bilgiyi yaymak, politikaları etkilemek, yeni politikalar üretmek ve en önemlisi de sürdürülebilir çözümleri hayata geçirmek için hepimizin rolü oldukça büyük ve önemli. Bu kongrenin hepimiz için verimli ve ilham verici olmasını diliyor, sunumlar, panel tartışmaları ve bildiri oturumlarımızın sizlere yeni bakış açıları kazandırmasını temenni ediyorum. Hep birlikte, sağlıklı bir yaşam ve sürdürülebilir bir gelecek için önemli adımlar atacağımıza olan inancım ile kongremize katkı sunan herkese teşekkürlerimi sunuyor, başarılı bir kongre diliyorum.Welcome to the second International "Çeşm-i Cihan Health Congress in a Changing World," organized by the Faculty of Health Sciences at Bartın University. Today, climate change has become a global issue, affecting the entire world. In response to this pressing challenge, we have selected the theme of this year’s congress as “Healthy Living in Global Climate Change: Sustainable Solutions.” The increasing global population, industrialization, urbanization, inadequate waste management, reliance on fossil fuels for energy production and transportation, and rising emissions of greenhouse gases such as CO2 and methane have significantly contributed to global warming. As a result, global temperatures have begun to rise rapidly. Studies reveal that even if all emissions were halted immediately, global temperatures would still increase by 0.2–0.5°C over the next decade. It is welldocumented that climate change exacerbates extreme weather events, such as droughts, heatwaves, floods, heavy rains, storms, and wildfires, and leads to biodiversity loss and increased migration, all of which negatively impact global health and are projected to continue doing so. Recent pandemics and natural disasters have once again highlighted that climate change is not only an environmental crisis but also a critical health and social issue. The World Health Organization estimates that between 2030 and 2050, climate change will cause approximately 250,000 additional deaths annually, primarily due to infectious diseases and food scarcity. Heat-related deaths are also expected to rise at least until 2050. These outcomes are anticipated to place immense stress on health infrastructure, leading to significant challenges in both healthcare systems and supply chains. During our two-day congress, we will not only address the adverse effects of climate change on society but also explore how we can develop sustainable solutions to combat climate change within a scientific framework. Moreover, we will discuss how we can promote healthier living on both individual and societal levels. This issue should not be regarded merely as an environmental concern but as an essential requirement for maintaining climatic balance to ensure a healthy life. Distinguished Participants, sustainable solutions do not only involve measures to protect our planet but also ensure the sustainability of our healthcare systems, food security, water resources, and living environments. Measures such as transitioning to renewable energy, adopting eco-friendly agricultural practices, increasing green spaces, and improving waste management will significantly contribute to ensuring that future generations can live in a healthy world. Throughout this congress, we will discuss with you, our valued participants, how the health challenges faced by societies are intricately linked to climate change, and we will strive to reach a consensus on potential solutions. We will also reflect on how each of us can contribute to addressing this global challenge. By now, it is evident to all of us that climate change is everyone’s concern. Raising awareness about global climate change and health, disseminating scientific knowledge, influencing policies, developing new strategies, and, most importantly, implementing sustainable solutions require all of us to take on significant and vital roles. I hope this congress will be productive and inspiring for everyone and that our presentations, panel discussions, and sessions will provide you with new perspectives. With the belief that we will take meaningful steps together toward a healthier life and a sustainable future, I extend my gratitude to everyone who has contributed to this congress and wish you a successful event
Design and PID Control of a Lower Limb Exoskeleton for Virtual Reality-Based Telerehabilitation
No full text11th International Conference on Mechatronics and Robotics Engineering-ICMRE-Annual -- FEB 24-26, 2025 -- Lille, FRANCERehabilitation is a critical process that enables people who have lost motor skills to regain their physical abilities. Exoskeletons offer innovative solutions to accelerate the functional recovery of patients and increase the effectiveness of treatment. The integration of virtual reality and biological signal processing technologies into such systems allows the user's movements to be detected in real time with high accuracy, enabling remote and personalised treatment. This study explains the working principle and control structure of a 4-degree-of-freedom lower limb exoskeleton robot developed for virtual reality-based telerehabilitation. The details of the electrical components of the system such as controller, input and output units, motor, sensor, virtual reality goggles, EEG and EMG devices and their interrelationships are explained. The position control performance for each joint using the PID control method is analysed. The results show that the exoskeleton can follow the given target trajectories with different error values depending on the period and joint. A maximum position error of 0.659 degrees was observed in the hip flexion-extension joint, while the average error for this joint was recorded as 0.385 degrees.Scientific and Technological Research Council of Turkiye [122N152]; Poland National Center for Research and Development [POLTUR5/2022/81/SmartExTwin/2023]This work was supported by The Scientific and Technological Research Council of Turkiye (Project Number: 122N152) and Poland National Center for Research and Development (POLTUR5/2022/81/SmartExTwin/2023).University of Lille I,IEEE Robotics and Automation Society,Centre de Recherche en Informatique Signal et Automatique de Lill
Determining the Relationship Between University Students' Belief in Romantic Love Myths, Attitudes Toward Dating Violence, and Attitudes Toward Violence Against Women
No full textAmaç: Bu araştırmanın amacı üniversite öğrencilerinin romantik aşk mitlerine inanma düzeyleri, flört şiddetine yönelik tutumları ve kadına yönelik şiddete yönelik tutumları arasındaki ilişkiyi belirlemektir. Gereç ve Yöntem: Tanımlayıcı ve kesitsel tipteki bu araştırma, Mayıs-Aralık 2022 tarihleri arasında Türkiye'nin kuzeyindeki bir üniversitede gerçekleştirilmiştir. Çalışmanın örneklemi, evreni bilinen örnekleme yöntemi kullanılarak hesaplanmıştır. Araştırma 374 öğrenci ile tamamlanmıştır. Veriler Demografik Bilgi Formu, Romantik Aşk Mitleri Ölçeği (RAMÖ), Flört Şiddeti Tutum Ölçeği (FŞTÖ) ve ISKEBE Kadına Yönelik Şiddet Tutum Ölçeği (KYŞTÖ) kullanılarak toplanmıştır. Verilerin değerlendirilmesinde betimsel istatistikler, Mann-Whitney U, Kruskal Wallis ve Spearman Korelasyon analizleri kullanılmıştır. Bulgular: Öğrencilerin %58,1'inin şu anda romantik bir ilişkisi yokken %57,0'ının daha önce romantik ilişki deneyimi olduğu belirlenmiştir. RAMÖ'den alınan ortalama puanlar 26,46±7,60, FŞTÖ puanları 4,42±0,48 ve KYŞTÖ puanları 131,35±21,55'tir. Erkek öğrencilerin, meslek liselerinde okuyanların ve 6 ay ile bir yıl arasında romantik ilişki süresi olanların romantik aşk mitlerine olan inanç düzeylerinin anlamlı olarak daha yüksek olduğu bulunmuştur (pObjective: This study aimed to determine the relationship between university students’ levels of belief in romantic love myths, attitudes toward dating violence, and attitudes toward violence against women. Methods: This descriptive and cross-sectional research was conducted at a university in northern Turkey between May and December 2022. The study sample was calculated using the known universe sampling method. The research was completed with 374 students. Data were collected using a Demographic Information Form, Romantic Love Myths Scale (RLMS), Dating Violence Attitude Scale (DVAS), and ISKEBE Violence Against Women Attitude Scale (VAWAS). Descriptive statistics, Mann-Whitney U, Kruskal Wallis, and Spearman Correlation analysis were used for data evaluation. Results: While 58.1% of students currently had no romantic relationship, 57.0% had previous romantic relationship experience. The average scores from RLMS were 26.46±7.60, DVAS scores were 4.42±0.48, and ISKEBE scores were 131.35±21.55. It was found that male students, those studying in vocational schools, and those with a romantic relationship duration between 6 months and one year had significantly higher levels of belief in romantic love myths (