a fourth-degree substrate integrated waveguide (siw) crossed coupled band pass filter for wlan band is designed by using a new negative coupling structure. it consists of two u shape microstrip lines on top and bottom planes with via holes at the center of them. this paper investigates the phase characteristics of negative and positive coupling structures and their effects. the design, fabricat...

abstract a 2.5 year old girl is presented with both hands constriction bands leading to distal amputations and the rare deformity of shoulder duplication in the right side accompanying constriction skin marking over the affected shoulder. the cephalomedial scapula articulated with the clavicle and the caudolateral scapula articulated with humeral head. the most important physical finding which ...

To clarify the suppression of postprandial blood glucose rise via alpha-glucosidase (AGH) inhibitory action by natural compounds, propolis was examined in this study. A single oral administration of propolis extract (50% methanol fraction on XAD-2 column chromatography) in Sprague-Dawley rats demonstrated a potent antihyperglycemic effect with the significant AUC(0-120 min) reduction of 38% at ...

In this paper, we suggest the use of the chi-square test for detecting backoff misbehaviour in IEEE 802.11 EDCA networks. A performance evaluation is performed to compare the chi-square test with two other methods, known in the literature. To perform a suitable comparison, these two methods are extended to support EDCA and the BEB mechanism. We assume a misbehaviour model, which can be easily e...

Copper and silver, respectively, were introduced into single crystals of CsCdF3. Our detailed electron paramagnetic resonance (EPR) study showed that both elements enter the Cd lattice site-copper as Cu2+, silver as Ag+, which then was converted into AgH by x raying the corresponding samples. Cu2+ and Ai+ were shown to present in their ground state a pseudostatic J ahn-Teller effect. Motional e...

M. Holtzer, B. Grabowska, S. Żymankowska-kumon, D. Kwaśniew skakrólikowska, R. Dańko, W. Solarski, A. Bobrowski, AGH University of Science and Technology, Faculty of Foundry Engineering, Kraków, Poland Procedures have been developed to determine the volume, rate and composition (particularly BTEX: benzene, toluene, ethylbenzene and xylenes and PAHs (polycyclic aromatic hydrocarbons)) of gas evo...

S. Żymankowska-Kumon, AGH University of Science and Technology, Kraków, Poland The article contains the results of emission BTEX (benzene, toluene, ethylobenzene and xylenes) during thermal destruction (500 – 1 300 °C) of moulding sand with furan resin. This furan resin is with a high content of free furfuryl alcohol (about 80 %). Knowledge of emissions of these compounds allows the assessment ...

The Polder Computing Environment, a system for interactive distributed simulation K. A. Iskra1, , R. G. Belleman, G. D. van Albada, J. Santoso, P. M. A. Sloot, H. E. Bal, H. J. W. Spoelder and M. Bubak4,5 1 Section Computational Science, Universiteit van Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands 2 Division of Mathematics and Computer Science, Faculty of Sciences, Vrije Univer...

M. Łucarz, AGH University of Science and Technology, Faculty of Foundry and Enginering, Kraków, Poland The application of thermogravimetric analysis can be very useful in the method since an extensive range of resins is used in founding. The thermal analysis performed for three different binders indicated the similar destruction mechanism. Along with the temperature increase the mass decrease o...

The main goal of this note is to provide a complete tool for verifying whether polytopes of complex polynomials whose degrees differ at most by one are Hurwitz stable. The results extend some classical theorems, such as the Edge Theorem given by Bartlett, Hollot and Huang (1988), its generalizations proposed by Sideris and Barmish (1989), Fu and Barmish (1989), and the eigenvalue criterion give...