Güncel Gönderiler

• Yükleniyor...

  Öğe Türü: Öğe ,

  Coherent control of optical lattices and optical unit cells in atomic medium by counter propagation of Laguerre Gaussian beams

  (NATURE PORTFOLIO, HEIDELBERGER PLATZ 3, BERLIN 14197, GERMANY, 2025) Ur Rahman, Latif; Zakir, U.; Bacha, Bakht Amin; Shah, Kamal; Abdeljawad, Thabet; Naseralla, Khaled

  Daha fazla

  This manuscript explores the coherent control of optical lattices and optical unit cells. Optical lattices are formed by the counter-propagation of Laguerre Gaussian beams within an atomic medium. Variations in absorption and the refractive index along the x and y axes provide insight into the confined modes of the optical lattice and its unit cells, from which we can extract information about mode confinement. Density plots of the absorption spectrum and refractive index reveal the presence of unit cells in both the valley and peak regions of the counter-propagating Laguerre Gaussian standing wave fields. In this manuscript, we control the Wigner and cubic-type unit cells of optical lattices with lattice parameters a = 0.3λ, b = 0.3λ, c = 0.3λ, a = 0.5λ, b = 0.5λ, c = 0.5λ, a = 0.6λ, b = 0.6λ, c = 0.6λ and a = 0.2λ, b = 0.2λ, c = 0.2λ.

  Daha fazla
• Yükleniyor...

  Öğe Türü: Öğe ,

  Molecular Diversity of Lupane Hybrids in Drug Design and Materials Science

  (MDPI, MDPI AG, Grosspeteranlage 5, CH-4052 BASEL, SWITZERLAND, 2025) Lipson, Victoria V.; Shirobokova, Maria G.; Gümüş, Mustafa Kemal; Öztürkcan, Arda; Chebanov, Valentyn A.

  Daha fazla

  The need for new, more effective drugs to treat cancer, infectious diseases, various parasitic infestations, and metabolic disorders requires innovative approaches to the design of promising molecules. One of these areas is the creation of hybrid structures. Lupane triterpenoids are of significant interest for such research due to their high abundance in natural sources and their renewable nature, their molecular architecture, presence of several easily modifiable functional groups, enantiomeric purity, broad spectrum of biological activity, and low toxicity. Active research into the biological properties of new pentacyclic triterpenoid derivatives, not only of the lupane series but also of the oleonane and ursane series, is evidenced by the large number of reviews and experimental studies devoted to this topic. Our interest in the modification of lupanoids stems not only from the search for biologically active compounds but also from the development of functional materials. However, the materials science aspects of lupanoid applications are virtually unknown in literature. We have tried to fill this gap and examined the possibility of using betulin derivatives to create advanced materials. The high lipophilicity and nanoscale molecular structure of these compounds make them highly promising as chiral dopants in liquid crystal compositions and organogel components.

  Daha fazla
• Yükleniyor...

  Öğe Türü: Öğe ,

  The Adaptation of the Multidimensional Neglectful Behavior Scale Parents form (5–9 Years) into Turkish: Validity and Reliability Studies

  (SPRINGER, ONE NEW YORK PLAZA, SUITE 4600 , NEW YORK, NY 10004, UNITED STATES, 2025) Beyazıt, Utku; Çınar Karasu, Kevser Tuğba; Bütün Ayhan, Aynur

  Daha fazla

  The purpose of this study was to adapt the Parents Form of the Multidimensional Neglectful Behavior Scale (MNBS-PR) for parents with 5–9 year old children into Turkish as well as to examine its validity and reliability. The study included 529 parents whose children were attending six separate primary schools in the city center of Istanbul, Turkiye. Construct and criterion-related validity analyses were conducted to examine the validity of the form. Within the scope of construct validity, confirmatory factor analysis was initially run and a structure consisting of six sub-dimensions and 28 items was obtained. Subsequently, discriminant validity analysis revealed that the heterotrait-monotrait ratio of correlations ranged between 0.01 and 0.83. In the criterion-related validity analysis, it was determined that there were significant associations between all sub-dimensions and the total score of MNBS-PR and the Parental Acceptance-Rejection Questionnaire scores. Regarding the reliability analysis, the Cronbach’s alpha coefficient for the entire form was determined as 0.78 and the McDonald’s omega coefficient was determined as 0.79. Therefore, the study findings indicated that the scale comprises a valid and reliable instrument that can assess parents’ neglect towards their children aged 5–9 years with a multidimensional approach in a Turkish sample. Highlights ● The aim of this study was to adapt the Parents Form of the Multidimensional Neglectful Behavior Scale (MNBS-PR) for parents with 5–9 year old children into Turkish. ● The study included 529 parents whose children were attending six separate primary schools in the city center of Istanbul, Turkiye. ● The study findings indicated that the scale comprises a valid and reliable instrument that can assess parents’ neglect towards their children aged 5–9 years in a Turkish sample.

  Daha fazla
• Yükleniyor...

  Öğe Türü: Öğe ,

  Lymph‑node ratio for micropapillary and nonmicropapillary diferentiated thyroid cancers: a comprehensive analysis

  (SPRINGER-VERLAG ITALIA SRL, VIA DECEMBRIO, 28, MILAN 20137, ITALY, 2025) Matlım Özel, Tuğba; Aydın, Hüsnü; Karakuş Bozkurt, Şeyma; Dural, Ahmet Cem; Şahbaz, Nuri Alper; Yurdacan Şahin, Müge; Güzey, Deniz; Akbulut, Sezer; Çelik, Aykut; Yıldız, Görkem; Güney, Burak; Canöz, Özden; Sarı, Serkan

  Daha fazla

  Background Regional lymph-node metastasis plays a pivotal role in predicting recurrence in patients with diferentiated thyroid cancer (DTC). Recent studies have highlighted the prognostic potential of the lymph-node ratio (LNR). This research aims to discern and compare LNR values in patients who underwent neck dissection specifcally for micropapillary DTC and those with nonmicropapillary DTC. Methods Patients who underwent central lymph-node dissection (CND) due to DTC at three diferent tertiary centers in Istanbul between 2013 and 2023 were retrospectively reviewed. Patient and tumor characteristics (age, sex, type of neck dissection, multifocality, subtype of DTC, and LNR) were recorded and analyzed. The total harvested lymph-node (LN) number, metastatic LN number, and LNR were recorded and compared between the micropapillary and nonmicropapillary groups. Results The mean age of the patients was 44±13.1 years, and the F/M ratio was 290/75. The mean dominant nodule size measured 15.53±0.63 mm. Neck dissection procedures were unilateral CND in 62% (n=226) and bilateral CND in 38% (n=139). According to the histopathological examination results, nonmicropapillary thyroid carcinoma (non-PTMC) was detected in 220 patients (60%), whereas papillary thyroid microcarcinoma (PTMC) was detected in 145 patients (40%). The mean LNR was 0.14±0.2 in patients with PTMC and 0.17±0.2 in patients with non-PTMC (p=0.286). Conclusion This study demonstrated that when regional lymph-node metastases (LNMs) develop in patients with PTMC, the LNR can be as high as that in patients with PTC. These fndings emphasize that, in clinical assessments of PTC, the LNR is independent of the main tumor size.

  Daha fazla
• Yükleniyor...

  Öğe Türü: Öğe ,

  Istanbul Gelişim University Faculty of Sports Sciences: Monthly E-Bulletin (October 2025)

  (İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2025) Istanbul Gelişim University Faculty of Sports Sciences

  Daha fazla

  New Sports Technology That Increases Reaction Time Through Brain Stimulation Transcranial direct current stimulation (tDCS), used to improve reaction times in athletes, has become a noteworthy neurotechnological method in performance science in recent years. This method, which increases neural excitability by applying lowintensity electrical current to the motor cortex, stands out particularly for its potential to support speed, agility and decision-making skills.

  Daha fazla