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TÜRKİYE’DE KAMU RAPORLARINDA DİJİTAL UÇURUMUN TEMSİLİ
No full textTürkiye’de kamu kurumları tarafından yayınlanan strateji raporları, dijital dönüşüm ve politika belgelerinde dijital uçurum kavramının nasıl tanımlandığı, hangi boyutlarıyla ele alındığı ve bu konuda kamu politikalarının nasıl bir yaklaşım benimsediği çalışmanın amacını oluşturmaktadır. Türkiye’de dijital uçurumun kamu raporlarında temsiline ilişkin toplamda 17 rapor ve belge tespit edilmiştir. Söz konusu dokümanlar, güncellik ve tematik çeşitlilik esas alınarak; özellikle dijitalleşme, toplumsal kapsayıcılık ve kamu hizmetleriyle doğrudan ilişkili olmalarına göre seçilmiş ve 9 rapor ile sınırlandırılmıştır. Çalışma kamu kurumlarına ilişkin belge ve raporların incelenmesine yönelik nitel araştırma yöntemlerinden doküman analizine uygun bir kodlama şeması çerçevesinde incelenmiştir. Veri analizi, MAXQDA 2022 nitel analiz yazılımı kullanılarak yapılmıştır. Bulgular incelendiğinde raporlarda erişim eşitsizliği, altyapı eksikliği, kullanıma yönelik eksiklikler ile dijital uçuruma yönelik politikalar ve önerilerin yer aldığı görülmektedir. Bu çalışma, dijital uçurum olgusunun yoğunlukla altyapı eksikliği boyutunda ele alındığı, en az ise toplumsal eşitsizliğe vurgu yapıldığını, dijital uçuruma yönelik politikaların daha çok hizmet sunumuna odaklandığını, söz konusu hizmetlere eşit erişimin ise yeterince tartışılmadığını ortaya koymaktadır. Bu kapsamda başta toplumsal eşitsizlik olmak üzere kullanım ve erişime yönelik eksikliklerin daha yapısal ve hak temelli bir biçimde ele alınması dijital uçurumun kapanmasına katkı sağlayacaktır. The purpose of this study is to examine how the concept of the digital divide is defined in strategy reports, digital transformation and policy documents published by public institutions in Turkey, which dimensions are addressed, and what approach public policies adopt in this regard. A total of 17 reports and documents related to the representation of the digital divide in public reports in Turkey were identified. The documents in question were selected based on their recency and thematic diversity, particularly their direct relevance to digitalisation, social inclusion, and public services, and were limited to nine reports. The study was conducted using a coding scheme suitable for document analysis, one of the qualitative research methods for examining documents and reports related to public institutions. Data analysis was performed using MAXQDA 2022 qualitative analysis software. Upon examination of the findings, it was observed that the reports addressed issues such as access inequality, infrastructure deficiencies, deficiencies in usage, and policies and recommendations regarding the digital divide. This study reveals that the digital divide phenomenon is predominantly addressed in terms of infrastructure deficiencies, with the least emphasis on social inequality, that policies addressing the digital divide focus more on service provision, and that equal access to these services is not sufficiently discussed. In this context, addressing deficiencies in usage and access, particularly social inequality, in a more structural and rights-based manner will contribute to closing the digital divide. </p
Instantaneous Lifetime Dynamics of Short Laser Pulse-Driven Positronium Embedded in Plasmas
No full textThis work examines the instantaneous lifetime dynamics of a positronium (Ps) atom under spherical confinement, influenced by a short laser pulse, and embedded in different plasma environments such as plasma-free (PF), Debye plasma (DP), quantum plasma (QP), and nonideal classical plasma (NICP). The effects of medium parameters-particularly the screening length, confinement radius, pulse frequency, and pulse strength are systematically analyzed. For the plasma interactions of the Ps atom, the work considers the screened Coulomb potential, exponential cosine screened Coulomb potential, and nonideal classical plasma potential. The corresponding wave equation is solved numerically using the tridiagonal matrix method. The effects of the short laser pulse are probed within the Runge–Kutta–Fehlberg formalism. Under the influence of the short laser pulse, the screening effects of plasma environments on the instantaneous lifetime of Ps are systematically examined in the time domain, and the functionalities of these environments are compared in detail. A similar analysis is also performed for the spherical confinement radius, as well as the strength and frequency of the short laser pulse. Significant influences and functional dependencies of the medium parameters and laser pulse on the instantaneous lifetime are identified. These results not only contribute to understanding the behavior of the Ps atom in complex environments but also provide a new perspective for controlled positronium applications in experimental plasma systems. The obtained findings offer new possibilities for engineering the lifetime dynamics of short-lived quantum structures, particularly Ps, in the context of laser-matter interactions and precise control of quantum systems in plasma environments. In this regard, they hold significant application potential across a broad spectrum ranging from antimatter physics to quantum optics
Formulation of thiosemicarbazide based epoxy resin as inhibitor for corrosion of mild steel in 1M HCl: electrochemcial and theoretical studies
No full textThe study presents the development of a new pentafunctional epoxy resin, pentaglycidylthiosemicarbazide (PGTSC), synthesised through a simple condensation process. The molecular structure of PGTSC was characterised using FTIR and 1H NMR spectroscopy. Viscosity measurements indicated that PGTSC's viscosity is significantly influenced by solution concentration and temperature, demonstrating its improved inhibition performance. Electrochemical tests showed that PGTSC achieves a maximum corrosion inhibition efficiency of 92% at a concentration of 10−3 M, with a notable reduction in corrosion current density from 608.60 µA/cm² to 36.67 µA/cm² in 1.0 M HCl. The polarisation studies revealed a mixed-type inhibition mechanism affecting both anodic and cathodic reactions, and the polarisation resistance increased, enhancing the protective properties of steel. The findings were corroborated by additional studies, including PDP, EIS, SEM observations, and computational DFT, MD, and MC calculations support the experimental findings and were in good agreement
Enhancement of mode I/II fracture toughness in basalt/Kevlar hybrid composites via multiwall carbon nanotube integration
No full textAbstract This study investigates the synergistic enhancement of Mode I and Mode II interlaminar fracture toughness (G IC and G IIC ) in basalt/Kevlar hybrid fiber-reinforced epoxy composites through multiwall carbon nanotube (MWCNT) integration. Hybrid laminates with two stacking sequences (B5K10B5 and K5B10K5) were fabricated via vacuum-assisted resin transfer molding (VARTM), incorporating MWCNTs at 0.1, 0.25, and 0.5 wt.% in the epoxy matrix. Fracture behavior was characterized using double cantilever beam (DCB) and end-notched flexure (ENF) tests, complemented by scanning electron microscopy (SEM) to elucidate failure mechanisms. Key results demonstrate that 0.1 wt.% MWCNTs optimally enhanced fracture resistance: K5B10K5 composites achieved 32.9 % G IC improvement (923.42 J m −2 ) and 22.9 % G IIC increase in mode II fracture toughness. B5K10B5 composites exhibited superior baseline G IC (998.61 J m −2 vs. K5B10K5’s 619.47 J m −2 ) but lower G IIC sensitivity to MWCNTs. Performance degradation occurred at 0.5 wt.% MWCNTs due to agglomeration, reducing G IC by 22.5 % in B5K10B5. Conversely, K5B10K5 showed exceptional G IIC (4481.06 J m −2 ) at 0.5 wt.%, attributed to crack bifurcation and shear-induced frictional sliding. SEM analysis confirmed that MWCNTs enhance toughness via crack bridging and fiber-matrix interlocking at optimal dispersion (0.1 wt.%), while agglomerates degraded Mode I performance but partially increased Mode II resistance. </jats:p
Ringde Nostalji: Mike Tyson ve Jake Paul Müsabakasının Retro Pazarlama Bağlamında İncelenmesi
No full textImpact of Encapsulated Thyme, Clove, and Sage Essential Oils on the Antioxidant, Physicochemical, DNA Binding, and Cleaving Properties of Chewing Gum
No full textThe use of essential oils (EOs) in various food matrices has gained interest due to their olfactory properties, as well as their antimicrobial and antioxidant activities, making them valuable in the development of functional foods. In this study, thyme, clove, and sage EOs were nanoencapsulated using the ionic gelation method. Their encapsulation efficiency, DNA binding and cleavage properties, particle size, and zeta potential were evaluated. These encapsulated EOs were then incorporated into sugar-free chewing gum formulations, and their antioxidant, anticarcinogenic, sensory, textural, and color properties were analyzed. The results showed the highest encapsulation efficiency for thyme EO (61.51% ± 1.52), followed by clove (56.10% ± 1.87) and sage (52.59% ± 0.56). The average particle sizes (Z-average) of encapsulated thyme, clove, and sage EOs were 330.1 ± 10.89, 452.6 ± 5.52, and 553.7 ± 0.01 d nm, respectively. All encapsulated EOs possessed negative zeta potential values ranging from −26.40 to −32.30 mV and polydispersity index (PDI) values between 0.399 and 0.433. The antioxidant activity of chewing gums increased with the addition of nanocapsules, and the percentage of DPPH inhibited the lowest for control with 6.73% ± 0.32 and 40.41% ± 0.07 for thyme in sugar-free gums. The concentrations of 0.05, 0.1, and 0.2% (w/w) were applied to evaluate the hydrolytic and oxidative cleavage activities. The DNA cleavage experiment revealed that chewing gum samples containing sage EO exhibited hydrolytic and oxidative cleavage activities. In contrast, chewing gum samples containing clove and thyme EOs exhibited only hydrolytic cleavage activity. The addition of 0.2% (w/w) of encapsulated thyme, clove, and sage EOs did not negatively affect the sensory and textural properties of the gum samples. Ultimately, the findings demonstrate that the incorporation of encapsulated EOs successfully enhanced the antioxidant properties of sugar-free gum without compromising its sensory quality
