Theoretical Bounds in Minimax Decentralized Hypothesis Testing

Minimax decentralized detection is studied under two scenarios: with and without a fusion center when the source of uncertainty is the Bayesian prior. When there is no fusion center, the constraints in the network design are determined. Both for a single decision maker and multiple decision makers, the maximum loss in detection performance due to minimax decision making is obtained. In the presence of a fusion center, the maximum loss of detection performance between with- and without fusion center networks is derived assuming that both networks are minimax robust. The results are finally generalized.Comment: Submitted to IEEE Trans. on Signal Processin

Breeding properties of Tinca tinca (L., 1758) living in Kapulukaya Reservoir (Kirikkale, Turkey)

This study involves the investigation of Tinca tinca (L., 1758) living in Kapulukaya Reservoir in Turkey. It was observed that the fish reach sexual maturity at the age of III and the breeding period starts in May and ends in July. The mean monthly gonadosomatic indices varied from 1.38 ±0.06 (in October) to 8.01±1.03 (in May). According to monthly variations of the GSI, spawning of the tench takes place between May (8.01 ± 1.03) and June (5.50 ± 0.57). The average egg number per fish was estimated to be 23403 ± 17047 . The eggs diameters varied from 0.50 mm to 1.33 mm (mean 0.86 mm). The relations between the fecundity (F) and body length (L) and body weight (W) were found as F = 0.037799 × L 1.0212 (r = 0.70) and F = 0. 00000175 × W 2.8696 (r = 0.62)

Two-Frequency Jahn-Teller Systems in Circuit QED

We investigate the simulation of Jahn-Teller models with two non-degenerate vibrational modes using a circuit QED architecture. Typical Jahn-Teller systems are anisotropic and require at least a two-frequency description. The proposed simulator consists of two superconducting lumped-element resonators interacting with a common flux qubit in the ultrastrong coupling regime. We translate the circuit QED model of the system to a two-frequency Jahn-Teller Hamiltonian and calculate its energy eigenvalues and the emission spectrum of the cavities. It is shown that the system can be systematically tuned to an effective single mode Hamiltonian from the two-mode model by varying the coupling strength between the resonators. The flexibility in manipulating the parameters of the circuit QED simulator permits isolating the effective single frequency and pure two-frequency effects in the spectral response of Jahn-Teller systems.Comment: 8 pages, 4 figures, figures revise

Short communication: Growth properties of tench (Tinca tinca L., 1758) living in Hirfanlı Reservoir (Kırşehir, Turkey)

Tinca tinca is originally from the Near East and West-Siberia and nowadays is spread all over the world. Previous reports showed that they abundantly present in the rivers flowing to the Black Sea and various lakes as well as in rivers in Central Anatolia. It has no economical importance due to its slow growth rate and tasteless meat. There are many publications on the growth and the bio-ecology and feeding of T. tinca. This study was carried out to investigate the growth properties, such as weight, length and condition factor, in T. tinca inhabit in Hirfanlı Reservoir built in 1959 on Kızılırmak River with the altitude of 856m and volume of 7.63 x10^9m^3. The study was carried out from August 1996 to July 1997 on 241 T. tinca species

HOMO SEMIOTICUS IN SCIENCE CLASSROOM: HOW FUTURE’S SCIENCE TEACHERS FACILITATE MEANING-MAKING OF SCIENCE CONCEPTS AS CITIZENS OF DIGITAL AGE?

Communication of scientific knowledge is ultimately multimodal. In science education, many researchers demonstrated that design of science texts has a great role in meaning-making of communicated scientific knowledge. In order to present message, representations are essential elements that need to be designed consciously by science educators. This study investigates meaning-making practices of pre-service science teachers during learning activities. In a social semiotic approach, multimodality principles were executed to reveal how participants think about meaning-making practices, how they design their learn materials, and how they orchestrate during teaching. 41 preservice science teachers participated to study. 33 of them responded multimodal literacy scale, all of them prepared a PowerPointTM presentation as ten groups to teach a certain general chemistry topic and classroom observations were done. It was seen that, in theory almost all pre-service science teachers have representational competence but the results stemming from real practices showed inverse. Results of this study demonstrated that there is a big gap between pedagogical concerns and meaning-making facilities in the practices of pre-service science teachers during a science instruction. It was implied that, designing learning materials that contain high meaning-making potentials and mastering to communicate it requires a theoretical and pedagogical knowledge.  Article visualizations

Composición de ácidos grasos en aceites de semillas de cáñamo de diferentes localidades de Turquía

Recent interest in hempseed as a source of food has largely focused on its oil content and fatty acid profile. The oil content and fatty acid composition (15 fatty acids) of twenty one different hempseed samples of domestic origin from north-western Turkey were monitored. The samples were obtained from seed wholesalers and local spice shops and are of unknown genetic origin. The oil content of the hempseeds ranged between 29.6 to 36.5%. Out of the 15 detected fatty acids, the omega-6 linoleic acid (18:2n-6) was predominant and fluctuated from 55.4 to 56.9%, while the omega-3 α-linolenic (18:3n-3) acid ranged from 16.5 to 20.4% and the omega-9 oleic acid (18:1n-9) ranged from 11.4 to 15.9%. Of the minor fatty acids, the highest concentrations were found for γ-linolenic acid (18:3n-6), range 0.6-1.1%, followed by stearidonic acid (18:4n-3), range 0.3-0.5%. These results show that hempseed grown in north-western Turkey provides a well balanced and rich source of dietary omega-6 and -3 essential fatty acids and appears to be a potentially valuable source of food.El reciente interés por las semillas de cáñamo como alimento se ha enfocado en su contenido en aceite y su perfil de ácidos grasos. En este estudio se analizó el contenido en aceite y composición de ácidos grasos de 21 muestras diferentes de semillas de cáñamo de origen genético desconocido en el noroeste de Turquía. El contenido en aceite de las semillas varió entre 29,6 y 36,5%. De los 15 ácidos grasos detectados, el ácido linoleico (18:2n-6) (omega-6) fue predominante y fluctuó entre 55,4 y 56,9%; el ácido α-linolénico (18:3n-3) (omega-3) entre 16,5 y 20,4%; y el ácido oleico (18:1n-9) (omega-9) entre 11,4 y 15,9%. Entre los ácidos grasos minoritarios, se encontraron las mayores concentraciones (entre 0,6 y 1,1%) para el ácido γ-linolénico (18:3n-6), seguido del ácido estearidónico (18:4n-3), entre 0,3 y 0,5%. Estos resultados muestran que las semillas de cáñamo que se cultivan en el noroeste de Turquía pueden ser un alimento potencialmente valioso y constituirían para la dieta una fuente rica y equilibrada de ácidos grasos omega-6 y -3