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Sınıf içi davranış sorunları ve öğretmen müdahaleleri: İlkokul düzeyinde inceleme
No full textAraştırmada ilkokullarda görev yapan öğretmenlerin karşılaştıkları sınıf içi olumsuz davranışlar ve bu davranışlara yönelik müdahaleleri araştırılmıştır. Araştırma nitel ve olgu bilim deseninde yapılmıştır. Veriler, maksimum çeşitlilik örnekleme seçimiyle belirlenen 22 öğretmen ile görüşülerek toplanmış ve betimsel analiz ile analiz edilmiştir. Araştırma sonucunda, öğretmenlerin görüşlerine göre, öğrencilerin ailelerinden kaynaklı sınıf içi sorunlarının başında ilgisizlik ve aile içi yaşantılar gelirken bunu iletişim eksikliği, kural bilmeme ve velilerin bilgisizliği izlemiştir. Bunun yanında, öğrencilerin arkadaşlarından kaynaklı yaşanan sorunların başında ise zorbalık gelirken bunu rekabet, çekişme, ayrışmalar ile küfür ve şiddetin izlediği; mülteci arkadaşlarından kaynaklı en önemli sorunun dil ve iletişim olduğu; engelli ya da kaynaştırma arkadaşlarından kaynaklı sorunlarla ilgili olarak da en çok dile getirilen sorunun empati eksikliği, olumsuz tutum ve davranışlar ile akademik eksiklik olduğu sonucuna ulaşılmıştır. Benzer şekilde, öğretmenlerin görüşlerine göre, fiziki ortam ve şartlardan kaynaklanan sorunların fiziki ve teknolojik yetersizlikler ile temizlik sorunları olduğu; ders içerik ve kazanımlarından kaynaklı sorunların müfredatın yoğunluğu yanında öğrenci seviyelerine uygun olmaması, ölçme değerlendirme sorunları, belirsizlikler ve araç-gereç eksikliği sorunları olduğu sonucuna ulaşılmıştır. Sınıf içinde öğrenci sorunlarını çözmeye yönelik stratejilerin başında etkili iletişim kurma yanında empatik davranma, olumlu davranışları ödüllendirme, kararlara dahil etme, kolektif çalışma ile rol yapma ve drama çalışmaları stratejilerinin uygulandığı; velilerle ve okul yönetimiyle ise işbirliği yapıldığı görülmüştür
Incidence and Predictors of Woven Endobridge (Web) Shape Modification Following Treatment of Intracranial Aneurysms in a Large Multicenter Study
No full textDiestro, Jose Danilo Bengzon/0000-0001-8450-2021The Woven EndoBridge (WEB) device is FDA-approved for the treatment of bifurcation aneurysms. Despite its wide popularity, it has been under scrutiny for its association with potential aneurysm recanalization and retreatment due to device shape modification. This study aims to analyze the shape modification rate of WEB devices and identify factors associated with this phenomenon, as well as its correlation with aneurysm retreatment. We conducted a retrospective review of the WorldWide WEB Consortium database, including adult patients treated for intracranial aneurysms with the WEB device. We assessed aneurysm occlusion using the WEB Occlusion Scale and defined WEB shape modification as a percentage reduction in the distance between two WEB markers. Logistic regression and Cox proportional hazards models were utilized to evaluate predictors of shape modification and retreatment. Kaplan-Meier curves were used to estimate the time-dependent probability of no or minor shape modification. A total of 405 patients were analyzed, with minor and major shape modification occurring in 31.4% and 10.1% of cases, respectively. Major shape modification was associated with lower rates of adequate occlusion (70.7%) compared to no or minor shape modification (86.6%) and a higher rate of retreatment (26.8% vs. 8.1%). Predictors of major shape modification included the presence of daughter sac, bifurcation aneurysms, absence of immediate flow stagnation, and a WEB width minus aneurysm width ratio = 0.5. The probability of no or minor shape modification declined within the first 25 months and stabilized thereafter. WEB device shape modification is a significant predictor of aneurysm occlusion efficacy and retreatment. Recognizing the factors influencing shape modification can guide treatment decisions and follow-up protocols to improve patient outcomes
Immunohistochemical Analysis of Asprosin and Meteorin-Like Peptide in Melanocytic Nevus and Malignant Melanoma
No full textIntroduction: Asprosin (ASP) plays many important roles in the central nervous system, peripheral tissues, and organs, such as appetite, glucose metabolism, insulin resistance, and cell apoptosis. Many experimental and clinical studies have examined the effects of meteorin-like peptide (METRNL) on inflammation. This study aimed to examine the immunohistochemical analysis of ASP and METRNL in healthy skin, melanocytic nevus, and malignant melanoma and to investigate their possible role in melanocyte proliferation an d whether ASP and METRNL are potential biomarkers for melanocytic tumor development. Materials and Methods: A total of 36 skin samples, including 12 benign nevi, 8 dysplastic nevi, 6 malignant melanoma, and 10 healthy skin around lesions removed from breast tissue that was not exposed to the sun as a control group were included in this study. The skin samples were stained immunohistochemically using the avidin-biotin-peroxidase complex method. Results: ASP and METRNL expressions were detected in the epidermis and hair follicles of healthy s kin. No significant difference was detected in ASP and METRNL histoscores in tumor tissues of benign nevus, dysplastic nevus, and malignant melanoma (p>0.05). Conclusion: Current findings suggest that ASP and METRNL may be associated with cell-to-cell interactions between keratinocytes, melanocytes, and inflammatory cells and may be effective in melanocyte functions. Future studies will clarify whether ASP and METRNL are potential biomarkers for melanocytic tumor development. © 2025, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved
The Effect of Serious Game on the Level of Anxiety, Fear, Knowledge of Hospitalized Children and Level of Anxiety in Their Parents
No full textBackground: Serious games can be used to increase the knowledge level of hospitalized children and reduce their anxiety levels and fear of medical procedures. Objectives: This randomized controlled study was conducted to examine the effects of the developed serious game on children's anxiety, fear and knowledge levels and their parents' anxiety levels. Methods: For this randomized controlled trial, a pre-test-post-test experimental study method was used, guided by the CONSORT checklist. The sample consisted of 70 children aged 8-12 years and their parents. Sociodemographic Data Collection Form, Fear Scale of Medical Treatment, Clinical Knowledge Form, State-trait Anxiety Inventory for Children and for Adults were used to data collection. Results: As a result of the study, it has been found that serious gaming affects the state and trait anxiety levels, medical treatment fear levels and clinical knowledge levels of hospitalized children aged 8-12 years. It was determined that the state anxiety of the parents of the children participating in the study decreased, their trait anxiety is not affected. Conclusion: In children aged 8-12 years, the use of serious game increased knowledge and decreased anxiety and fear of medical procedures. Larger studies involving parents are needed. Application to practice: Nurses are healthcare professionals who play a key role in managing anxiety through non- pharmacological interventions. Opportunities should be created for nurses to use artificial intelligence in their own initiatives and transfer it to the clinical environment. It is the first Turkish serious game developed by nurses. (c) 2025 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.Pamukkale University Scientific Research Projects Coordination Unit [2021SABE019]This study was supported by Pamukkale University Scientific Research Projects Coordination Unit through Project number 2021SABE019. There is no conflict of interest in this article
Hypophosphatemia: Unraveling a Lethal Connection With Icu Mortality in Critically Ill Covid-19 Patients: a Multicenter Observational Study
No full textBackground: Despite a lack of sufficient knowledge about the prevalence and impact of hypophosphatemia in critically ill COVID-19 patients, organ dysfunction, adverse clinical outcomes, and increased mortality have been consistently associated with hypophosphatemia across diverse patient populations. This retrospective, observational study aimed to investigate hypophosphatemia (HypoP) frequency and establish the correlation between variations in serum phos-phorus levels and outcomes in critically ill patients with SARS-CoV-2. Methods: The research comprised 205 patients diagnosed with COVID-19 confirmed via RT-PCR. The study included COVID-19 patients who experienced respiratory failure and were in intensive care for more than 24 hours, and their phosphorus values were accurately documented. Clinical parameters, comorbidities, respiratory support require-ments, and laboratory findings were analysed. Results: The study participants had a median age of 64 (IQR: 54-75 years), with hypertension being the most pre-valent chronic disease (46%). During the first three days of intensive care, 33% of the participants received conven-tional oxygen support, whereas 54% required intubation and mechanical ventilation (MV). During this period, hypo-phosphatemia was noted in 25% of patients, with an ICU admission median serum phosphorus level of 1.02 (0.87-1.25) mmol/L. The median duration of stay in the intensive care unit (ICU) was 7 days, significantly extended in patients with hypophosphatemia (p=0.046). Phosphorus levels on the third day of ICU stay were an independent predictor of ICU mortality. (COX, HR=1.48, 95% CI=1.11-1.98, p=0.006) Conclusions: During the first three days of ICU admission, 25% of SARS-CoV-2 critically ill adult patients presented with hypophosphatemia. This condition was found to increase ICU mortality rates and prolong ICU stays. Therefore, it is crucial to monitor serum phosphorus levels in the care of critically ill COVID-19 patients
Çekme karavanlar için rüzgâr – güneş hibrit enerji sistemi uygulamaları
No full textElektrik enerjisi üretim sistemlerinde yenilenebilir enerji kaynaklarına yönelim giderek artmaktadır. Güneş panelleri ve rüzgâr türbinlerinin bir arada kullanımıyla elektrik ihtiyacını karşılayacak bir sistem kurulmuştur. Bu sistemler hibrit elektrik enerji sistemleri olarak adlandırılmaktadır. Yenilenebilir enerji kaynaklarının kullanıldığı hibrit enerji sistemlerinde sürdürülebilir ve kaliteli enerji alınması önemlidir. İstenen gücün sistem çıkışındaki gerilimi optimum düzeyde olabilmesi için ilave dönüştürücülerden de faydalanılmaktadır. Bu sistemlerin karmaşık olması sebebiyle bilgisayar simülasyonları; hibrit enerji sistemlerinin kurulması, modellenmesi ve planlaması için kullanılan farklı ekonomik ve mühendislik parametrelerin optimum değere getirilmesine olanak sağlamaktadırlar. Bu simülasyonlar yeni olan herhangi bir sistemdeki uygulamaları yapabilmekte ve sistemin çalışma sırasında meydana gelebilecek sorunları tespit edebilmektedirler. Karavan kullanıcıları yazın plajda tatil yapmanın yanı sıra kış turizminde de ürününü kullanmak istemektir. Fakat kış aylarında ısıtma ve diğer elektriksel ihtiyaçların karşılanabilmesi için daha fazla enerji gereksinimi bulunmaktadır. Fakat güneşin kışın yetersiz olması sebebiyle rüzgâr türbini gibi elektrik sağlayıcılarına ihtiyaç duyulmaktadır. Ayrıca yetersiz enerji girişi sebebiyle akülerin daha fazla derin deşarja maruz kalması depolama sisteminin ömrünü azaltmaktadır. Yaz aylarında da geceleri rüzgâr enerjisi oluşmakta fakat değerlendirilememektedir. Güneş – rüzgâr hibrit enerji sistemlerinin karavanlar üzerinde uygulanması var olan enerji kaynaklarının kullanılabilmesi ve enerji ihtiyacının rahat bir şekilde karşılanabilmesi açısından önem arz etmektedir. Bu tez çalışmasında sistemin çalışma prensibi, parçaların özellikleri ve gerekli hesaplamalar, farklı özellikteki hibrit sistem uygulamaları hakkında bilgilere yer verilmiş, karavanlar için 910w kapasiteli hibrit enerji sistemi uygulaması gerçekleştirilmiştir.The tendency towards renewable energy sources in electrical energy production systems is increasing. A system that will meet the electricity need by using solar panels and wind turbines together is established. These systems are called hybrid electrical energy systems. In hybrid energy systems where renewable energy sources are used, it is important to receive sustainable and high-quality energy. Additional converters are also used in order for the voltage at the system output of the desired power to be at an optimum level. Due to the complexity of these systems, computer simulations allow the different economic and engineering parameters used for the establishment, modeling and planning of hybrid energy systems to be brought to optimum values. These simulations can perform applications in any new system and detect problems that may occur during the operation of the system. Caravan users want to use their products in winter tourism as well as having a holiday at the beach in the summer. However, in the winter months, there is a need for more energy to meet heating and other electrical needs. However, since the sun is insufficient in the winter, electricity providers such as wind turbines are needed. In addition, due to insufficient energy input, the batteries are exposed to more deep discharge, which reduces the life of the storage system. Wind energy is also generated at night in the summer months, but it cannot be evaluated. The application of solar-wind hybrid energy systems on caravans is important in terms of using existing energy sources and meeting energy needs easily. In this thesis, the working principle of the system, the features of the parts and the necessary calculations, information about different hybrid system applications are given, and a 910w capacity hybrid energy system application for caravans is implemented
Automated Ecg Arrhythmia Classification Using Feature Images With Common Matrix Approach-Based Classifier
No full textThis paper seeks to solve the classification problem of cardiac arrhythmias by using a small number of electrocardiogram (ECG) recordings. To offer a reasonable solution to this problem, a technique that combines a common matrix approach (CMA)-based classifier model with the Fourier decomposition method (FDM) is proposed. The FDM is responsible for generating time-frequency (T-F) representations of ECG recordings. The classification process is performed with feature images applied as input to the classifier model. The feature images are obtained after two-dimensional principal component analysis (2DPCA) of data matrices related to ECG recordings. Each data matrix is created by concatenating the ECG record itself, the Fourier transform, and the T-F representation on a single matrix. To verify the efficacy of the proposed method, various experiments are conducted with the MIT-BIH, Chapman, and PTB-XL databases. In the assessments using the MIT-BIH database under the inter-patient paradigm, we achieved a mean overall accuracy rate of 99.81%. The proposed method outperforms the majority of recent efforts, yielding rates exceeding 99% on nearly five performance metrics for the recognition of V- and S-class arrhythmias. It is found that, in the classification of four types of arrhythmias using ECG recordings from the Chapman database, our model surpasses recent works by reaching mean overall accuracy rates of 99.76% and 99.45% for the raw and de-noised ECG recordings, respectively. Similarly, five different forms of arrhythmias from the PTB-XL database were recognized with a mean overall accuracy of 98.71%
Application of Adapt-Cmsa To the Electric Vehicle Routing Problem With Simultaneous Pickup and Deliveries
No full textThe Vehicle Routing Problem (VRP) has long been a cornerstone in combinatorial optimization, aiming to optimize the fleet of vehicles delivering goods in a transportation network. With the global shift towards sustainability, Electric Vehicles (EVs) have emerged as a green logistics alternative, leading to the Electric Vehicle Routing Problem with Simultaneous Pickup and Delivery (EVRP-SPD). This problem variant introduces the complexities of EV constraints, such as battery limitations and recharging necessities, coupled with handling delivery and pickup demands simultaneously during a single customer visit. This paper presents the application of the recent hybrid metaheuristic Construct, Merge, Solve ; Adapt (CMSA) to the EVRP-SPD. Our self-adaptive version of CMSA, combined with a set covering-based mathematical formulation, offers a promising approach to efficiently tackle larger instances of the problem, aiming to provide high-quality solutions. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.Technological Research Council of Turkey; Ministry of National Education, Turkey, (YLYS-2019); Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK, (119M236); Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTA
New Full-Wave Rectifiers Based on the Plus-Type Second-Generation Current Conveyors
No full textPsychalinos, Costas/0000-0002-0817-7228; Yuce, Erkan/0000-0001-7775-3949; Minaei, Shahram/0000-0002-6921-9348; Yucehan, Tolga/0000-0002-8835-0907Two new full-wave rectifiers (FWRs) based on two plus-type second-generation current conveyors are proposed in this paper. Also, the proposed FWR structures comprise two diodes and two grounded resistors without matching conditions. They are not affected from any bias voltage(s) and/or current(s); thus, they eliminate the need for extra circuitry. One of the proposed FWRs provides positive rectification, while the other offers negative rectification. Both proposed FWRs have high input impedance and gain. Simulation results are obtained through the SPICE program, and experimental results are provided. We present two new full-wave rectifiers (FWRs) based on two plus-type second-generation current conveyors. The proposed FWRs comprise two diodes and two grounded resistors without matching conditions. They are not affected by any bias voltage(s) and/or current(s), thus eliminating the need for extra circuitry. One of the proposed FWRs provides positive rectification, while the other offers negative rectification. Both proposed FWRs have high input impedance and gain. Simulation results are obtained through the SPICE program, and experimental results are provided.imageThe circuits of this manuscript were previously published in [49] as the PhD thesis
Thermal Treatments of Titanium- and Nickel-Based Alloys Processed by Powder Bed Fusion Technology
No full textOne of the most widely utilised additive manufacturing processes is powder bed fusion, which fabricates complex, custom-designed components directly from powders using a layer-by-layer procedure. This type of additive manufacturing method provides many advantages and benefits over many other additive manufacturing methods, including a comfortable design, the production of final products without the need for any secondary material removal process, and the easy production of complicated parts in a short time with high three-dimensional accuracy and precision. Powder bed fusion has gained widespread use recently for producing high-performance alloys like those based on titanium and nickel. Despite the advantageous characteristics of powder bed fusion-processed products, they still suffer from poor mechanical properties, low density, porosity, and other defects. Accordingly, post-process thermal and heat treatments significantly improve the overall properties. This study aims to provide an overview of how heat treatment procedures can enhance the properties and performance of powder bed fusion-processed Ti- and Ni-based alloys. Accordingly, stress-relieving, quenching/hardening, annealing/recrystallization, and thermo-mechanical heat treatments have been investigated, which can have a significant impact on the structure–property performance of powder bed fusion-processed Ti- and Ni-based alloys. The heat treatment greatly influences the evolution of the microstructure and the production of new phases. © 2024 Canadian Institute of Mining, Metallurgy and Petroleum.University of Maraghe