Cilt 02, Sayı 2 (2012)

A novel algorithm for computer based assessment

2024-01-23T08:41:21Z

A novel algorithm for computer based assessment Ata, Oğuz; Balık, Hasan H. Student learning outcomes have been evaluated through graded assignments and tests by most paperbased assessment systems. But computer based assessments have the opportunity to improve the efficiency of assessments process. Recently internet is widely used in various areas from banking to trade, from education to entertainment. In this paper, ideas for efficient and fast usage of internet on education have been suggested and applied to implementation of multiple choice examination system. There are two contributions to the science in this paper. The first is the implementation of new software which uses the bandwidth efficiently. The second is to introduce new mechanism for creating question bank.

Some plant extracts that prevent lipid peroxidation and protect the unsaturated fatty acids in the fenton reagent environment

2024-01-23T08:37:56Z

Some plant extracts that prevent lipid peroxidation and protect the unsaturated fatty acids in the fenton reagent environment Kireçci, Oğuz Ayhan; Gökçe, Zehra; Özşahin Kireçci, Ayşe Dilek; Balcı, Gülcan; Yılmaz, Ökkeş This study investigated protective effects of the Laurus nobilis, Arum italicum and Malva sylvestris extracts on the unsaturated fatty acids and the prevention of lipid peroxidation formation in the fenton reagent environment. Antioxidative activities of the plant extracts were determined with the following modifications. Lipid peroxidation level in the Fenton R group was significantly high when compared to the control group, but lipid peroxidation significantly decreased according to the Fenton R group (p<0.0001). It was determined that extracts had scavenging effect on the DPPH radical depending on the increase in the flavonoid concentration. Present results confirm that plants decrease lipid peroxidation level in the fenton reagent environment and protect markedly unsaturated fatty acids in the environment with radical sourced oxidations.

The gross alpha and beta radioactivity concentration on the Sivrice (Elazığ) fault zone

2024-01-23T08:33:57Z

The gross alpha and beta radioactivity concentration on the Sivrice (Elazığ) fault zone Şahin Bal, Sultan; Kuluöztürk, Muhammed Fatih; Doğru, Mahmut Sivrice Fault Zone of the East Anatolia Fault System is seismically active and it often produces earthquakes in various magnitudes (almost between 2.0-4.5 Md). Recently, we have been monitoring the existence of soil radon in different four locations of this zone. The radon existence on the fault zone is slighly higher than other locations. Thus, it is interesting to determine the gross alpha and beta radioactivity concentrations in the water and soil of the same location where the soil radon monitoring was done to determine whether there was any correlation between radioactivity concentration and soil radon or not. Determination of the gross alpha and gross beta radioactivity concentrations were done by using ZnS (Ag) and beta sensitive plastic detectors, respectively. The obtained results for both measurements were concluded.

Molecular dynamics simulation of crystallization of amorphous aluminium modelled with EAM

2024-01-23T08:26:19Z

Molecular dynamics simulation of crystallization of amorphous aluminium modelled with EAM Çelik, Fatih Ahmet The crystallization process of a amorphous aluminium (Al) containing 2048 atoms is studied with molecular dynamics (MD) simulation. Amorphous and crystal structure of Al is reproduced by applying fast cooling treatment and crystal behaviour from amorphous phase by means of MD simulation. The local order of the system have been analysed by bond orientational order parameters, the radial distribution functions and atomic coordinates. The simulation results also show that there are transformations from a disordered structure to a stable crystal phase during the crystallization.