Karamanoğlu Mehmetbey University
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Observation of WWγ production and search for Hγ production in proton-proton collisions at √s=13 TeV
No full textPubMed ID: 38579207The observation of WWγ production in proton-proton collisions at a center-of-mass energy of 13 TeV with an integrated luminosity of 138 fb−1 is presented. The observed (expected) significance is 5.6 (5.1) standard deviations. Events are selected by requiring exactly two leptons (one electron and one muon) of opposite charge, moderate missing transverse momentum, and a photon. The measured fiducial cross section for WWγ is 5.9 0.8ðstatÞ 0.8ðsystÞ 0.7ðmodelingÞ fb, in agreement with the next-to-leading order quantum chromodynamics prediction. The analysis is extended with a search for the associated production of the Higgs boson and a photon, which is generated by a coupling of the Higgs boson to light quarks. The result is used to constrain the Higgs boson couplings to light quarks. © 2024 CERN, for the CMS Collaboration
Lithography-free highly sensitive detection of glucose based on colloidal spheres
Get PDFDiabetes has emerged as a global health crisis, with a substantial increase in prevalence and associated healthcare costs. The urgency for early diagnosis to prevent complications has fueled research into advanced biosensing technologies. Plasmonic sensors, leveraging localized surface plasmon resonance (LSPR), have gained prominence for their sensitivity. This study explores a metamaterial-based sensor platform comprising nanospheres fabricated through colloidal lithography. A comprehensive numerical and experimental analysis of the designed metamaterial-based sensor is presented, focusing on the spectral response at the resonance frequency of 535 nm. Finite-difference time-domain (FDTD) simulations reveal the field and charge distributions, enabling a systematic exploration of geometric parameters’ impact on absorption resonance. The chosen optimum parameters are validated experimentally, demonstrating excellent agreement between numerical predictions and experimental outcomes. The spectral shifts occurring in the absorption spectrum of the sensor have demonstrated the molecular detection capability of very low concentrations of glucose oxidase, such as 0.001 ppm. Our approach, offering a cost-effective alternative to common fabrication methods, holds promise for the mass production of highly sensitive biosensors, providing a pathway for the development of advanced diagnostic tools for diabetes and other healthcare applications
Power generation prediction of a geothermal-thermoelectric hybrid system using intelligent models
No full textThis study focuses on the most effective use of energy resources, which is the main goal of sustainable energy systems. The first contribution of the research is to ensure that the waste and geothermal fluids generated during the geothermal energy production process are evaluated in the most efficient way and reused for energy production. For this purpose, a geothermal-thermoelectric hybrid experimental system has been designed to produce electrical energy through heat exchange and how waste thermal energy could be reused in this process has been examined. Experimental tests have been performed under electrical load and in the presence of real-time uncertainties such as temperature changes, thermal conductivity, electrical noise, heat losses and random variations in thermal interaction. The second main contribution of the study is to predict and evaluate different power generation performances in the Thermoelectric Generator (TEG) system, which is affected by the mentioned experimental limitations based on artificial intelligence models. In addition, the optimal prediction performance of artificial intelligence models using hyper-parameter optimization has also been compared. Experimental results have shown that intelligent models are a successful tool for energy prediction in geothermal power generation. As a result of the hyper-parameter optimization, each model is improved by ?5 % to ?30 % in various error metrics. However, it was observed that the decision tree-based learning techniques resulted in ?46 % to ?96 % less inaccurate predictions on various error metrics compared to other methods. Power production predictions obtained using intelligent models have been obtained with 98.7 % accuracy with LightGBM learning algorithms. Most of the models used to classify different hot and cold water levels exhibit very high classification performance. The results show the successful integration of artificial intelligence models in effectively utilizing waste thermal energy and adopting a sustainable approach to energy production. © 2023 Elsevier Lt
Effect of intensive training on immune system cells in elite female weightlifters
No full textOBJECTIVE: This study aimed to investigate the effects of intense weightlifting training on lymphocyte and natural killer cell subgroups, which are the major cells of the immune system, in elite female weightlifters.METHODS: A total of 20 elite female weightlifters were evaluated using flow cytometry before training (pre-T), immediately after training (post-T), and after a 120-min rest period (rest-T).RESULTS: Post-T and rest-T showed significant decreases in helper T (Th) and cytotoxic T compared with pre-T (p=0.045, p<0.001 and p=0.05, p<0.001, respectively). B and natural killer cells were higher in post-T and rest-T than in pre-T. The increase in B cells was significant in pre-T/rest-T (p<0.001) but not in pre-T/post-T (p=0.122). Intense training significantly increased natural killer cells in both post-T and rest-T (p<0.001). CD56brightand CD56dim natural killer cell subgroups were significantly lower in post-T and rest-T than in pre-T (p=0.005, p=0.006 and p<0.001, p=0.004, respectively).CONCLUSION: This study shows that intense weightlifting alters peripheral lymphocyte and natural killer subgroup ratios, being the first investigation in this field.Necmettin Erbakan University Scientific Research Projects Coordinator [221218009]The study was supported by Necmettin Erbakan University Scientific Research Projects Coordinator for supporting this study with research project number 221218009 research project numbers
Perceptions of forest product businesses employees in Turkey regarding occupational health and safety during the COVID-19 pandemic
No full textPubMed ID: 37742673BACKGROUND: The COVID-19 pandemic has undeniably brought up the issue of Occupational Health and Safety (OHS) for businesses in Turkey. In this global pandemic, strategies developed to effectively address OHS risks and eliminate them with reliable, high-quality data have gained importance. OBJECTIVE: This study aimed to determine the perceptions of employees in the forest products industry in Turkey regarding the OHS during the COVID-19 pandemic. METHOD: The sample of the descriptive and analytical study consisted of a total of 371 employees in forest product businesses located in Turkey. The sample of the study was determined by the purpose-based sampling method. Data were collected both online and face-To-face from June 2022 to October 2022. The data were obtained using the Questionnaire of Employee and Business Characteristics and the Scale of Employees' Perceptions on the OHS (S-POHS) adapted by Özden (2022). Statistical analysis was performed using SPSS and calculated by descriptive analyses, pairwise comparison tests and multivariate regression analyses. RESULTS: 39.1% of the employees with a mean age of 34.12±8.78 years are high school graduates and 61.5% are workers. Significant differences were found in the S-POHS average scores of the employees in the businesses that produce paper-cardboard, have operated for less than 20 years, have a partnership structure with foreign capital and have an OHS Management System Quality Certificate (p < 0.05). CONCLUSION: While a positive OHS perception level has already been achieved in the forest products industry in business administrations and by employees, it is clear that this should not be lost and it should be prepared for the next crises by adding new applications
Classification of killing magnetic curves in ℍ3
Get PDFIn this paper, we study classification of magnetic curves corresponding to Killing vector fields of ℍ3. First, we solve the geodesic equation analytically. Then we calculate the trajectories generated by all the six Killing vector fields, which are considered as magnetic field vectors, by using perturbation method up to first-order with respect to the strength of the magnetic field. We present a comparison of our solution with the numerical solution for one case. We also prove that 3-dimensional (α)-Kenmotsu manifolds cannot have any magnetic vector field in the direction of their Reeb vector fields
Determination of essential oil constituents and antioxidant activities of hybrid species Salvia × karamanensis Celep & B. T. Drew and its parents (Salvia aucheri Benth. subsp. canescens (Boiss. & Heldr.) Celep, Kahraman & Dogan × Salvia heldreichiana Boiss. ex Benth.)
No full textWOS:001180930500001Salvia × karamanensis is endemic to Türkiye and is a hybrid of Salvia aucheri subsp. canescens and Salvia heldreichiana. In this study, the essential oil content and composition of S. × karamanensis hybrid species and its parents S. aucheri subsp. canescens, S. heldreichiana were determined. Essential oils of the plants were obtained by hydro distillation method using Clevenger apparatus for 3 h and the essential oil components were determined by GC-MS. As a result of the distillation, it was determined that S. aucheri subsp. canescens, contains 0.80%, while S. × karamanensis and S. heldreichiana contain 0.64 and 0.48% essential oil, respectively. The major components of the essential oils were borneol, 1,8-cineole, camphor, α-pinene, borneol and α-terpineol. The DPPH antiradical activity of the samples was determined as 46.70 ± 0.09, 33.78 ± 0.68 and 25.93 ± 0.72 (S. aucheri subsp. canescens, S. × karamanensis and S. heldreichiana), respectively. The highest phenolic content in terms of gallic acid was obtained from S. aucheri subsp. canescens with 15,02 mg/100 ml, followed by S. × karamanensis with 14,43 mg/100 ml and S. heldreichiana with 13,43 mg/100 ml
Ultra-hybrid sensor based on magnetic and fluorescent biomaterial for the sensitive/selective detection of toxic Ag+ and Hg2+ ions in real samples
No full textWOS:001174281500001The development of high-performance, eco-friendly and magnetic sensors prepared from natural products have recently attracted a lot of attention for the selective detection of metal ions in aqueous environments and the simultaneous detection of metals in the same environment. In this study, a fluorescent and magnetic sensor (MSp-P[5]-EN-B) was prepared by the immobilization of Bodipy and pillar [5]arene on the sporopollenin surface modified by Fe3O4 for the selective detection of Ag+ and Hg2+ ions separately and together in the aqueous solution. The characterization of the fluorescent and magnetic sensor, MSp-P[5]-EN-B, was supported by techniques such as SEM, FT-IR, and XRD. The fluorescence data of MSp-P[5]-EN-B sensor was examined with various concentrations in the range 1–100 μM that in here, an “on-off” fluorescence process for Ag+, and Hg2+ and the detection limits are 0.019 μM and 0.33 μM, respectively. As a result, the designed magnetic MSp-P[5]-EN-B sensor showed strong potential in terms of its accurate, sensitive, and practical application in the separate and simultaneous detection of Ag+ and Hg2+ ions in aqueous media
Comparison of blood parameters of scuba divers
No full textTez No: 873129Bu araştırmada tüplü dalış yapan bireylerin dalış öncesi ve sonrası kan parametrelerindeki değişimleri incelemek için planlanmıştır. Çalışmaya Balıkesir/Ayvalık ilçesinde Rekreaktif amaçlı dalış yapan yaş ortalamaları 22.54 ± 1.20 yıl, boy ortalamaları 180.31 ± 4.63 cm, kilo ortalamaları 77.54 ± 9.98 kg ve vücut kitle indeksleri 23.92 ± 3.46 olan ve dalış için herhangi bir engeli olmayan 13 dalıcı gönüllü olarak katılmıştır. Dalıcıların kan parametreleri ölçümünde tek gruplu Ön test – Son test uygulanmıştır. Verilerin analizinde spss 27 paket program kullanılmıştır. Elde edilen verilerde; çalışmaya katılan dalıcıların kan değerleri karşılaştırıldığında total kolesterol parametresinde istatistiksel olarak anlamlı fark olduğu saptanmıştır (p 0.05). Sonuç olarak tüplü dalış kan parametrelerinde rakamsal olarak değişimler meydana getirdiğini, total kolesterol parametresini arttırdığı söylenebilir.The aim of this study was planned to examine the changes in blood parameters of individuals who do scuba diving before and after diving. Thirteen divers, who were diving for recreational purposes in Balıkesir/Ayvalık district, with an average age of 22.54 ± 1.20 years, an average height of 180.31 ± 4.63 cm, an average weight of 77.54 ± 9.98 kg and a body mass index of 23.92 ± 3.46 kg/m2, and who did not have any disabilities for diving, participated in the study voluntarily. A single group Pre-test-Post-test was applied to measure the divers' blood parameters. SPSS 27 package program was used to analyze the data. In the data obtained; When the blood values of the divers participating in the study were compared, it was determined that there was a statistically significant difference in the total cholesterol parameter (p 0.05). As a result, it can be said that scuba diving creates numerical changes in blood parameters and increases the total cholesterol parameter
Development of environmental literacy tool for children (8-9 years old): validity and reliability study
No full textBu araştırmanın amacı 8-9 yaş öğrencilerinin çevre okuryazarlık düzeyini ölçmeye yönelik geçerli ve güvenilir bir ölçme aracı geliştirmektir. Araştırmanın çalışma grubunu Karaman ili merkeze bağlı ilkokullarda eğitim-öğretim gören 516 üçüncü sınıf ve 238 dördüncü sınıf öğrencisi oluşturmaktadır. Çocuklar için Çevre Okuryazarlığı Aracının (ÇİÇOA) yapı gerçerliğini test etmek için açımlayıcı ve doğrulaycı faktör analizi yapılmıştır. ÇİÇOA çevre bilgisi testi, çevreye yönelik duyuşsal eğilimler ölçeği ve çevreye yönelik sorumlu davranış ölçeği olmak üzere üç alt boyuttan oluşmaktadır. Çevre bilgisi testinde çevre bilgisi alt boyutunda 10 soru ve çevre sorunları alt boyutunda 12 soru olmak üzere toplam 22 sorudan oluşmaktadır. Çevre bilgisi testinin KR 20 güvenirlik katsayısı .74 olarak bulunmuştur. Çevreye yönelik duyuşsal eğilimler (ÇYDE) ölçeği olumlu tutum alt boyutunda 11 madde, olumsuz tutum alt boyutunda 6 madde ve çevre koruma bilinci alt boyutunda 5 madde olmak üzere toplam 22 maddeden oluşmaktadır. ÇYDE ölçeğinin cronbach alpha değerleri olumlu tutum boyutu için .79 olumsuz tutum boyutu için .73, çevre koruma bilinci boyutu için .73 ve ölçeğin tamamı için .84 olarak hesaplanmıştır. Çevreye yönelik sorumlu davranış (ÇYSD) ölçeği politik davranış boyutunda 6 madde, tüketici ve ikna boyutunda 7 madde ve eko-yönetim boyutunda 4 madde olmak üzere toplam 17 maddeden oluşmaktadır. ÇYSD ölçeğinin cronbach alpha değerleri politik davranış boyutu için .81, tüketici ve ikna davranışı boyutu için.75, eko yönetim boyutu için .78 ve ölçeğin tamamı için .84 olarak hesaplanmıştır. ÇİÇOA’da yer alan ölçeklerin birbiriyle ilişkili olduğu ve yapılan analizler sonucunda aracın çevre okuryazarlığını ölçebilecek geçerli ve güvenilir bir ölçme aracı olduğu ortaya konmuştur.The aim of this study is to develop a valid and reliable measurement tool to measure the environmental literacy level of 8-9 year old students. The study group of the research consisted of 516 third grade and 238 fourth grade students studying in primary schools in the centre of Karaman province. Exploratory and confirmatory factor analyses were conducted to test the construct validity of the Environmental Literacy Instrument for Children (ELIC). The ELIC consists of three sub-dimensions: environmental knowledge test, scale of affective dispositions towards the environment and scale of responsible behaviour towards the environment. The environmental knowledge test consists of a total of 22 questions, 10 questions in the environmental knowledge sub-dimension and 12 questions in the environmental problems sub-dimension. The KR 20 reliability coefficient of the environmental knowledge test was found to be .74. The scale of affective dispositions towards the environment consists of a total of 22 items, including 11 items in the positive attitude sub-dimension, 6 items in the negative attitude sub-dimension and 5 items in the environmental protection awareness sub-dimension. The cronbach alpha values of the EFL scale were calculated as .79 for the positive attitude dimension, .73 for the negative attitude dimension, .73 for the environmental protection awareness dimension and .84 for the whole scale. The environmentally responsible behaviour scale consists of a total of 17 items, including 6 items in the political behaviour dimension, 7 items in the consumer and persuasion dimension and 4 items in the eco-management dimension. The cronbach alpha values of the environmentally responsible behaviour scale were calculated as .81 for the political behaviour dimension, .75 for the consumer and persuasion behaviour dimension, .78 for the eco-management dimension and .84 for the whole scale. It was found that the scales in the ELIC are related to each other and that the instrument is a valid and reliable measure of environmental literacy as a result of the analyses