Efficiently Controllable Graphs

We investigate graphs that can be disconnected into small components by removing a vanishingly small fraction of their vertices. We show that when a quantum network is described by such a graph, the network is efficiently controllable, in the sense that universal quantum computation can be performed using a control sequence polynomial in the size of the network while controlling a vanishingly small fraction of subsystems. We show that networks corresponding to finite-dimensional lattices are efficently controllable, and explore generalizations to percolation clusters and random graphs. We show that the classical computational complexity of estimating the ground state of Hamiltonians described by controllable graphs is polynomial in the number of subsystems/qubits

Time Independent Universal Computing with Spin Chains: Quantum Plinko Machine

We present a scheme for universal quantum computing using XY Heisenberg spin chains. Information is encoded into packets propagating down these chains, and they interact with each other to perform universal quantum computation. A circuit using g gate blocks on m qubits can be encoded into chains of length $O(g^{3+\delta} m^{3+\delta})$ for all $\delta >0$ with vanishingly small error

The prevalence of probable migraine and sleep quality among women aged 20-49 living in a semi-rural area in western Turkey

Background: We aimed to evaluate the prevalence of probable migraine, to examine the factors associated with probable migraine and to assess the level of sleep quality among women aged 20-45 who were living in the county town named Mahmudiye, in Eskisehir, in Turkey.Methods: The study was carried out in all women aged 20-45 years in Mahmudiye. 69.2% of women (n=570) comprised the study group. Questionnaire consisted of three parts: The first part included several socio-demographic, nutritional and health characteristics. The second part included questions about the headache type and third part included Pittsburgh Sleep Quality Index (PSQI). Migraine type headache was scanned via the International Headache Society (IHS) criteria for migraine. There were eight criteria which were defined by IHS. Individuals who possessed the six of the eight criteria were defined as “probable migraine”.Results: The mean age of the participants was 32.8±7.3 years. Prevalence of probable migraine was 13.3% (n=60) and it was significantly higher in women who have been smoking and who had a physician diagnosed chronic diseases. Of the women, 45.1% had poor sleep quality based on the PSQI. The sleep quality of probable migraineurs was found significantly lower than healthy women.Conclusions: To control the probable migraine symptoms and attacks, we suggest to giving regular treatment to women with chronic diseases and reducing the smoking.

Eating disorders and anxiety among high school students in Western area of Turkey

Background Eating disorders (ED) are the one of the most common chronic illness among adolescents. The aim of the present study was to investigate eating disorders and it's associations between anxiety among high school students in Sivrihisar in Eskisehir, Turkey.Methods: This cross-sectional study was carried out in the high school students of center of Sivrihisar between 01 January 2014 and 28 February 2014. The questionnaire prepared according to literature, consisting of 3 parts (socio-demographic characteristics, eating attitude test (EAT-40) and beck anxiety inventory (BAI)). The students completed questionnaire in the presence of a member of the research team. The data collected were self-reported by the students.Results: Of the study group 64.4% (n=625) were females and 35.6% (n=345) were males. The prevalence of eating disorder was 13.0% (n=126). The mean and standard deviation of students' total score of EAT-40 were 18.80±9.88 (ranged 3 to 95).  The mean and standard deviation of students' total score of BAI were 20.32±12.32 (ranged 0 to 63). The positive weak correlation was found between the total scores of EAT-40 and BAI (r=0.178; p=0.001).Conclusions: ED is an important health problem for adolescents. On the studies upon epidemiology of ED towards high school students, socio-economic factors should be assessed in more detailed and more comprehensive perspective.