Fano Enhancement of Unlocalized Nonlinear Optical Processes

Field localization boosts nonlinear optical processes at the hot spots of metal nanostructures. Fano resonances can further enhance these "local" processes taking place at the hot spots. However, in conventional nonlinear materials, the frequency conversion takes place along the entire crystal body. That is, the conversion process is "unlocalized". The path interference (Fano resonance) schemes developed for localized processes become useless in such materials. Here, we develop Fano enhancement schemes for unlocalized nonlinear optical processes. We show that 3 orders of magnitude Fano enhancement multiply the enhancements achieved via field trapping techniques, e.g., in epsilon-near-zero~(ENZ) materials. We demonstrate the phenomenon both analytically and by numerical solutions of Maxwell's equations. The match between the two solutions is impressive. We observe that the interference scheme for unlocalized processes is richer than the one for the local processes. The method can be employed for any kind of nonlinear optical conversion. Moreover, the Fano enhancement can be continuously controlled by an applied voltage.Comment: 10 pages, 5 figure

INVESTIGATION OF THE EFFECT OF MENSTRUATION PERIOD ON SPORTIVE PERFORMANCE OF WOMEN’S FUTSAL PLAYERS

This paper was to investigate the effect of menstruation cycles on sportive performance in women’s futsal players. A total of 8 healthy, active and volunteer women players who had a regular menstruation period and didn’t use any regulatory medical supplement (oral contraceptive) were recruited for this study. To analyse data, means of age, height, body weight and BMI values of the players, standard deviation, minimum and maximum values were calculated. The Friedman Two Way Analysis of Variance (ANOVA) test from nonparametric tests was employed to determine if there is a difference among menstrual phases. Findings clearly indicate that flexibility, vertical jump and anaerobic power values showed significant decrease (P<0,01), while other performance variables didn’t show statistical significant differences (P>0.05) among menstrual cycles. In a nutshell, it can be concluded that menstrual cycles of women’s futsal players don’t affect the flexibility, power, speed, anaerobic and aerobic power performances.  Article visualizations

INVESTIGATION INTO THE EFFECTS OF STATIC AND DYNAMIC STRETCHING ON VERTICAL JUMP PERFORMANCE OF TAEKWONDO ATHLETES

This study has sought to illuminate the effect of static and dynamic stretching exercises on the vertical jump performance of taekwondo players. 14 volunteer players were solicited to take part in this study. The participants who were 14-17 age range are licensed players of Amasya Tekhan Sports Club. The protocol employed by Gelen (2008) so as to investigate into the effects of different stretching protocols on the vertical jumping was utilised for tests. Vertical jump tests were conducted on participants three times following each stretching activity in 4-5 min and the best results were noted. Height, body weight and means of BMI, standart deviation, minimum and maximum values of the athletes were measured. A one-way variance analysis in repeated measures (ANOVA) was employed to analyze the data. Findings clearly indicate that neither static nor dynamic stretching exercises have an effect on jumping performance. Correspondingly, this finding may have caused from the physical and psyhological traits of taekwondo players. In summation, based on the analysis in this study, it can be concluded that static and dynamic stretching exercises done after slow aerobic runnings before jumping had no significant effect on front jumping (FJ), squat jumping (SJ) and drop jumping (DJ) performance.  Article visualizations