Aksaray Üniversitesi Kurumsal Akademik Arşivi
DSpace@Aksaray, Aksaray Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Isotopic dependence of (n,α) reaction cross sections for Fe and Sn nuclei
(Elsevier B.V., 2024) Küçüksucu, S.; Yiğit, Mustafa
The (n,α) reactions play an important role for the energy generation and the synthesis of chemical elements in the stars, as well as for nuclear engineering and medical applications. The aim of this study is to explore the evolution of (n,α) reactions in Fe and Sn isotope chains in order to assess the cross section properties with the increase of neutron number in target nucleus, and to make a comparison with other relevant neutron induced reactions. The cross section calculations are based on the statistical Hauser-Feshbach and exciton models in TALYS nuclear reaction code, using global optical model potential that is additionally adjusted by the (n,α) cross section data for 54Fe and 118Sn. The calculations of (n,α) reactions in Fe and Sn isotopes provide the insight into their isotopic dependence and properties over the complete relevant range of neutron energies. The cross sections result in pronounced maxima at lower-mass isotopes, and rather strong decrease for neutron-rich nuclei consistent with the reduction of the reaction Q-value and increased contributions from other exit channels from compound nucleus. The analysis of the Maxwellian averaged cross sections at temperatures in stellar environment shows that the (n,α) reactions have significant contributions for low-mass Fe isotopes, that is opposite than for Sn isotopes. For both neutron rich isotopes γ and neutron emissions dominate, with their interplay depending on the temperature involved.
Involvement of microbial species for plant growth promotion and disease suppression
(Elsevier, 2024) Şam, Mesut; Sağlam, Semran; Altındağ, Serap; Sağlam, Necdet
Our need for agricultural production is progressively increasing as a result of the growing global population. It has become more important than ever to eliminate the conditions that affect plant ecosystem adversely, such as pathogenic microorganisms and insects that affect plant health. This has led to a steady rise in our reliance on agrochemicals, which are used to eliminate these unfavorable conditions and are now the most crucial tool for plant protection. These agrochemicals, which can adversely affect both agricultural products and the ecosystem, are not the eventual solution to our problems, and may lose their effectiveness over time since the target organisms develop resistance. Furthermore, the toxic effects of chemical residues in food have significantly changed the communities' consensus on chemicals, leading to studies for alternative solutions.
AI in a superintelligent society: its impact on businesses
(Apple Academic Press, 2024) Uğuz Arsu, Şerife
The industrial revolutions of the last few centuries and the rapid developments and innovations in information and communication technology have brought great changes to society and organizations. Due to the intensive use of robotic technologies in working life, it is obvious that these changes will also affect businesses. The aim of the study is to draw attention to the transformation that will be experienced in enterprises with the effect of artificial intelligence in Industry 5.0, which is called industrial revolutions, and especially in Industry 5.0, which is called supersmart society, and to draw a general framework on how it will affect the structure of enterprises, ways of doing business, employee profiles, employment policies, business processes, behavior patterns in business life, and competition strategies. In addition, it is aimed to raise awareness on issues such as the opportunities obtained in the transition from Industry 4.0–5.0, the difficulties to be experienced, concerns about the rapid changes brought by technological transformations to business conditions, behavioral and managerial problems between employees and robots, and basic skill gaps in the management and manager roles of enterprises. In this context, starting from the transition from Industry 4.0 to Industry 5.0 with industrial revolutions, the effects of artificial intelligence on enterprises in a superintelligent society are examined in all conceptual aspects.
The effects of propofol on Doppler echocardiographic values of the aorta, main pulmonary artery, and mitral E wave in New Zealand white rabbits
(Chulalongkorn University Printing House, 2024) Çetinkaya, Mehmet Alper; Kaya, Mahir
The aim of this study was to determine the effects of propofol on acceleration time (AT), ejection time (ET), AT / ET ratio obtained from the aorta (Ao) and main pulmonary artery (MPA) and Doppler echocardiographic values of mitral E wave (E) in New Zealand white rabbits. Echocardiographic evaluation was performed in 40 conscious rabbits and repeated after propofol administration. The baseline mean values were 0.028±0.006 second (s) for Ao-AT, 0.116±0.017 s for Ao-ET, 0.24±0.036 for Ao-AT / ET, 0.05±0.01 s for MPA-AT, 0.137±0.018 s for MPA-ET, 0.38±0.037 s for MPA-AT/ET, 84.13±18.26 cm/s for E peak velocity, 3.06±1.38 mmHg for E peak pressure, 0.069±0.018 s for E duration, 0.046±0.015 s for E deceleration time (Edec)._After propofol administration, the decrease in velocity (P = 0.044, 90.76±14.39 vs. 83.04±12.24) and peak pressure gradient (P = 0.036, 3.47±1.01 vs. 2.98±0.77) of Ao wave, as well as left ventricular ejection fraction (EF) and fractional shortening (FS) was statistically significant (P < 0.001, 70.1±4.47 vs. 63.2±3.79, 37.85±3.74 vs. 32.15±2.43, respectively); AT was longer (P < 0.05) and AT/ET was increased (P < 0.001) in both Ao and MPA. Among Doppler echocardiographic parameters of the E wave, there was only a statistically significant difference for Edec (P = 0.008). In the presented study, while the effect of propofol is minimal on Edec, its effects on aortic and pulmonic AT/ET values, as well as EF and FS values, should be taken into consideration.
Extended goal programming approach for solving multi-objective de novo programming problems
(IGI Global, 2024) Umarusman, Nurullah
A new proposal has been made in this study to solve the multi-objective de novo programming problem using extended goal programming, which includes minmax and weighted goal programming. In the proposal, goal functions are created by fixing each objective function of the multi-objective de novo programming model to its own positive ideal solution. Additionally, the normalization constant is determined using positive and negative ideal solutions in the proposal. The proposed approach made it possible to determine the range in which "efficiency and equity" are balanced in the transition from max. efficiency to max. equity. The applicability of the proposed approach is demonstrated in an illustrative example, and considering the obtained results, the optimal point that represents both poles of the extended GP equally is obtained. Through this optimal point, the optimal feasible amount of each constraint is calculated from the extended goal programming perspective.
