Abstract:The definition of the data mining can be told as to extract information or knowledge from large volumes of data. Statistical and machine learning techniques are used for the determination of the models to be used for data mining predictions. Today, data mining is used in many different areas such as science and engineering, health, commerce, shopping, banking and finance, education and internet. This study make use of WEKA (Waikato Environment for Knowledge Analysis) to compare the different classification techniques on energy efficiency datasets. In this study 10 different Data Mining methods namely Bagging, Decorate, Rotation Forest, J48, NNge, K-Star, Naïve Bayes, Dagging, Bayes Net and JRip classification methods were applied on energy efficiency dataset that were taken from UCI Machine Learning Repository. When comparing the performances of algorithms it's been found that Rotation Forest has highest accuracy whereas Dagging had the worst accuracy.
Xylenol is a phenolic chemical substance having two methyl groups and one hydroxyl group attached to a benzene ring and has six isomers. 2,4-xylenol is the only isomer of the xylenol molecule that is in the liquid phase while the remaining isomers are all in crystal form at room temperature. In the scope of this study, we have experimentally investigated ionization and dissociation properties of xylenol isomers. All experiments were carried out by using a time of flight mass spectrometry (TOF-MS) system coupled with a femtosecond laser system. The laser pulse power-dependent multiphoton ionization of xylenol isomers was investigated by using IR (800 nm) femtosecond laser pulses having a pulse width of ∼90 fs in duration and laser intensities changing from 2.6 × 1013 to 2.6 × 1014 W/cm2. Theoretically, molecular orbitals (LUMO+1, LUMO, HOMO, HOMO–1), vertical and adiabatic ionization energies were calculated using density functional theory (DFT) with B3LYP functional and 6–311++G(d,p) basis set by following geometry optimization and performing conformational analysis.
Rapid developments in technology, diversification of tools provided that can be used in the education stage.These new technologies facilitate learning improving the quality of learning and affects students' performance. In accordance with physics laws, it is desired to describe events or experiments. It is possible to create animations and simulations with the help of various programs in the computer. It is thought that via animation and simulation, student can learn the concepts which can be learned in laboratories used for physics lessons with lower cost and in shorter time. In this study, general physics course and laboratory test commissioned by the resistance ammeter-voltmeter method of determination of the issue are utilized in better animation lectures and simulations in order to comprehend by the students. Descriptions relating to experiments and issues were formed as animations. With animations, it has been shown how ammeters, voltmeter and rheostat will be connected, to the circuit. With the sample in the animations, it has been shown that the extraction of the formula how to calculate the current and voltage values from ammeter and voltmeter. In the simulation which is given at the end of the experiment, let the student to enter to the blank space in the table which the values students want to enter, it is aimed for students to understood and test how good they can understand the fact that how potential difference, flow violence or resistance values are calculated. It has also been worked to defeat misconceptions on this issue. In this way, more comfortable experiment understanding of the students' has been targeted.
Vast developments in information and technology era necessitate implementation of technology reinforced teaching & learning. Information and communication technologies remove the negative effects of preparation and understanding problems. Scientist admit that animations and simulations widely contribute education by learning through experience. Abstract courses like physics complicate comprehension of student therefore alternative teaching methods like animation and simulation are used. In this study, we had benefit of animations for achieving better comprehension on teaching "Resistance Measurement with Wheatstone Bridge". Primarily, definitions about the topic are given as animations then, the simulation. Following the directions given to students, calculation of unknown resistance through entering values in simulation with aiming students to understand what Wheatstone bridge is used for. The bridge circuit is built in simulation on computer environment and calculation of the unknown resistance per student is procured by monitoring the change on galvanometer. Besides, derivation of the formulas are showed in animations aiming minimizing misconception about topic and better comprehension.
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