Browsing by Author "Çelik, Ahmet"
Now showing items 1-7 of 7
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Assessment of natural radiation exposure levels and mass attenuation coefficients of lime and gypsum samples used in Turkey
Damla, Nevzat; Çevik, Uğur; Kobya, Ali İhsan; Çelik, Ahmet; Çelik, Necati (Springer Nature, 2009-11-17)The activity concentrations of 226Ra, 232Th, and 40K in lime and gypsum samples used as building materials in Turkey were measured using gamma spectrometry. The mean activity concentrations of 226Ra, 232Th, and 40K were ... -
Bazı saturated sayısal yarıgruplar üzerine
Süer, Meral; İlhan, Sedat; Çelik, Ahmet (Dicle Üniversitesi, 2016-12) -
Katlılığı 6 olan saturated sayısal yarıgruplar üzerine
Süer, Meral; İlhan, Sedat; Çelik, Ahmet (Batman Üniversitesi, 2017)İlk olarak sayısal yarıgrup problemi, “ Sayısal yarıgruba ait olmayan en büyük tamsayıyı üreteçleri cinsinden nasıl ifade edilebilir?” şeklinde olup, 19. yy sonunda karşımıza çıkmıştır. Sayısal yarıgrup çalışan ilk ... -
On Arf closures of some numerical semigroups generated by three elements
Süer, Meral; İlhan, Sedat; Çelik, Ahmet (Harran Üniversitesi, 2017-05)A numerical semigroup is a subset of the set of nonnegative integers (denoted here by ¥ ) closed under addition, containing the zero element and with finite complement in ¥ . A numerical semigroup is a set of the form 1, ... -
On the fundamental gaps of some saturated numerical semigroups with multiplicity 4
Süer, Meral; İlhan, Sedat; Çelik, Ahmet (Hikari, 2016)In this study, we calculate the number of fundamental gaps of the some numerical semigroups which are for and and for and and or. Also, we give the type sequence of these numerical semigroups. -
On the numerical semigroups with generated by two elements with multiplicity 3
Süer, Meral; İlhan, Sedat; Çelik, Ahmet (Harran Üniversitesi, 2017-05)Throughout this study, we assume that ¥ and ¢ be the sets of nonnegative integers and integers, respectively. The subset S of ¥ is a numerical semigroup if 0 Î S , x + y Î S, for all x, y Î S , and Card(¥ \S)< ¥ ( this ... -
Radiation dose estimation and mass attenuation coefficients ofcement samples used in Turkey
Damla, Nevzat; Çevik, Uğur; Kobya, Ali İhsan; Çelik, Ahmet; Çelik, Necati; Grieken, R. Van (Elsevier, 2009-12-16)Different cement samples commonly used in building construction in Turkey have been analyzed for natural radioactivity using gamma-ray spectrometry. The mean activity concentrations observed in the cement samples were 52, ...
