Gazi University Dspace
Not a member yet
26981 research outputs found
Sort by
The contribution of additional sampling in cholecystectomy materials: A multicenter prospective study
No full textMathematical model and heuristic approach for solving dynamic vehicle routing problem with simultaneous pickup and delivery: Random iterative local search variable neighborhood descent search [Dinamik eş zamanlı topla dağıt araç rotalama probleminin çözümü için matematiksel model ve sezgisel yaklaşım: Rassal iteratif yerel arama değişken komşu iniş algoritması]
No full textThe effects of memantine on recovery from propofol anesthesia, cognitive function and pain in elderly rats [Yaşlı Ratlarda Memantin'in Propofol Anestezisinden Derlenme, Kognitif Fonksiyon ve Ağrı Üzerine Etkisi]
No full textSelectıng The Country Wıth The Best Cyber Securıty System In Nuclear Supply Chaın
No full textBilgisayar güvenliğine olan ilginin ve akabinde bu yöndeki araştırmaların ve uygulamaların arttığı günümüzde pek çok uluslarası devlette olduğu gibi ülkemizde de gelecekte yaşanması olası tehdit senaryolarına karşı yeni düzenlemeler yapılmakta ve savunma sistemleri geliştirilmektedir. Bu düzenlemeler en nihayetinde nükleer tesislerin güvenliğini de etkileyebilecek olan bilgisayar güvenliği gereksinimlerini de karşılamalıdır. Bilgi ve bilgisayar güvenliğinin hedefinde genelde elektronik veri ve bilgisayarların siber tehditlere karşı korunması vardır. Bu tezin hedefi ise nükleer tedarik zincirinde yer alan dijital sistemlerin her türlü kötü niyetli eyleme karşı hazırlıklı olmasını sağlamak, bu amaçla yalnızca nükleer tesislerin değil nükleer güvenliği aynı seviyede etkileyebilecek tüm tedarik zincirinde siber güvenliği sağlamanın gerekliliği konusunda farkındalık kazandırmaktır. Bu tezin bilgisayar güvenliği konusunda bilgi alt yapısı oluşturulması, nükleer tedarik zincirinin işleyiş mekanizmasının ortaya konularak olası tehditlerin değerlendirilmesi ve bu hususta ortaya konulabilecek savunma sistemlerinin geliştirilmesi bakımından faydalı olacağı düşünülmektedir. Bu tezde, diğer ülke uygulamalarının ve uzman görüşlerinin aktarılması sağlanarak ülkemiz nükleer altyapısının güçlendirilmesi ve nükleer tedarik zinciri yönetiminde siber güvenliği geliştiren başarı faktörlerini Analitik Hiyerarşi Prosesi(AHP) kullanarak sıralaması bakımından katkısı olacaktır.Today, as the interest in computer security and subsequent research and applications in this direction have increased, new regulations are being made and defense systems are being developed against future threatening scenarios in our country, as in many international states. These regulations must also meet computer security requirements, which may ultimately affect the security of nuclear facilities. Electronic data and computers are generally protected against cyber threats at the target of information and computer security. The aim of this thesis is to ensure that the digital systems in the nuclear supply chain are prepared for all kinds of malicious actions, and for this purpose, to raise awareness about the necessity of providing cyber security in the entire supply chain that may affect not only nuclear facilities but also nuclear security at the same level. It is thought that this thesis will be useful in terms of establishing an information infrastructure on computer security, evaluating possible threats by revealing the functioning mechanism of the nuclear supply chain and developing defense systems that can be revealed in this regard. In this thesis, it will contribute to the strengthening of our country's nuclear infrastructure and listing the success factors that improve cyber security in the nuclear supply chain management by using the Analytical Hierarchy Process (AHP) by providing the transfer of other country practices and expert opinions
Analysis of the effect of the number of criteria and alternatives on the ranking results in applications of the multi criteria decision making approaches in machining center selection problems
No full textMulti criteria machining center selection models are widely used in the
literature. In the applications of multi-criteria decision making
models, machining center selection criteria are directly taken from
catalogues. It is known that to have a ranking model sensitive to the
weights of the selection criteria, it is especially important to limit
the number of selection criteria to 7 +/- 2. A similar proposal can be
put forward for the number of machining centers. In this study, whether
or not reducing the number of criteria and alternative machining centers
make the ranking results more sensitive to the changes in the criteria
weights is studied using Spearman's rank correlation test. The study
results show that the ranking results become more sensitive with a
reduced number of criteria and alternative machining centers
Surgical management of peripheral facial paralysis due to temporal bone fractures [Temporal Kemik Fraktürüne Baǧli Periferik Fasial Paralizinin Cerrahi Tedavisi]
No full text
Insecticidal Activity ofHyoscyamus nigerL. onLucilia sericataCausing Myiasis
No full textBackground:Hyoscyamus nigerL. (Solanaceae) generally known as henbane,
is commonly distributed in Europe and Asia. In Turkey, henbane seeds
have been used in folk medicine to remove worms from the eyes. The
present study aimed to investigate the insecticidal activity ofH.
nigerseeds. Methods:n-hexane, ethyl acetate, methanol and alkaloid
extracts were prepared from the seeds of the plant and their
insecticidal activities onLucilia sericatalarvae were evaluated.
EC(50)and EC(90)values of the alkaloid extract were calculated and
morphological abnormalities were investigated. Results: Alkaloid extract
prepared from the seeds of this plant displayed significant insecticidal
activity. EC(50)values ofH. nigerseeds alkaloid extract were found to be
8.04, 8.49, 7.96 mu g/mL against first, second and third instar,
respectively. It was determined that malformations of larvae included
damaged larvae with small size, contraction and weak cuticle.
Furthermore, HPLC analysis was performed on alkaloid extract ofH.
nigerseeds and main components of the extract were determined. It was
determined that alkaloid extract mainly contain hyoscyamine and
scopolamine. Conclusions: These results confirm the folkloric usage of
the plant and suggest that the alkaloid content of the plant could be
responsible for the insecticidal activity