Compact Broadband Rectangular Microstrip Patch Antenna

In this paper, using two or more U-slots which are mutually coupled, we are further able to extend the bandwidth achievable by single U-slot. Our Proposed design on 1.6 mm high FR4 substrate is 69 mm X 62 mm (L X W) in size which is vary compact, low profile and conformable. We have chosen licence free band from 7.6 GHz to 9.2 GHz which has not yet been targeted by any commercial product till now. We expect major wave of wireless product for Biomedical, Industrial, Defence and IOT applications in this frequency band in years to come. Our design achieves 1.6 GHz (20%) bandwidth around 8.3 GHz with fairly good gain achievable in low profile substrate. In our design we have introduce Microstrip ring to improve directivity of a antenna. The measured and simulated response shows close agreement thus validating our design

The effect of water salinity on growth and survival of Rutilus frisii kutum fingerlings

This research was carried out over a period of 60 days in the summer and autumn of 2005 in the Caspian Sea Aquaculture Research Station (Inland Water Aquaculture Research Center). Fingerlings of Rutilus frisii kutum weighting one gram were transferred to fiberglass 100 liter tanks each stocked with 35 fish. The fish were divided into five groups and treated with five treatments and three replicates including, fresh water, 4ppt, 6ppt, 8ppt, and 10ppt salinity by completely randomized design. We found that different salinities did not affect the mortality rate of the fish. Comparison of food conversion ratio (FCR), special growth rate (SGR) and weight gain (WG) between control and other treatments revealed a significant difference (P less than or equal to 0.05). We also found that the 4ppt treatment differed meaningfully with 8ppt and 10ppt treatments in terms of FCR, SGR and WG (P less than or equal to 0.05) and the same was true between 6ppt and 8ppt and 10ppt treatments for the FCR, SGR and WG. The results showed that the maximum and minimum weight gain were related to 10ppt treatment (mean 58.9 plus or minus 2.71) and control (mean 39.1 plus or minus 4.73) respectively. The minimum special growth rate (0.549 plus or minus 0.057) was referred to the control treatment and the maximum (0.772 plus or minus 0.028) was seen in 10ppt salinity .The minimum average FCR (3.93 plus or minus 0.122) was seen in 10ppt salinity and the maximum (5.6 plus or minus 0.601) was observed in the control treatment. According to the results, it is suggested that the optimal salinity for fingerlings with mean weight 1gr is 8ppt and 10ppt

A refined shear deformation theory for bending analysis of isotropic and orthotropic plates under various loading conditions

In this paper, a refined trigonometric shear deformation theory is applied for the bending analysis of isotropic and orthotropic plates under the various loading conditions. The two unknown variables are involved in the present theory. The present theory satisfies the shear stress free condition at top and bottom surface of the plates without using shear correction factors. The governing equations and boundary conditions are obtained by using the principle of virtual work. A closed form solution is obtained using Navier Solution Scheme. A simply supported isotropic and orthotropic plate subjected to sinusoidally distributed, uniformly distributed and linearly varying loads are considered for the detailed numerical study. The results obtained using present theory are compared with previously published results.

Moxifloxacin and bilateral acute iris transillumination

Recent publications have alerted clinicians to a syndrome of uveitic transilluminating iris depigmentation associated with systemic fluoroquinolones and other antibiotics. Bilateral acute iris transillumination, which is associated with loss of the iris pigment epithelium and results in iris transillumination, differs from the previously described bilateral acute depigmentation of the iris, which is associated with atrophy of the iris stroma without transillumination. We present a case of fluoroquinolone-associated uveitis with anterior segment optical coherence tomography imaging to highlight some observations about this syndrome. We interpret pharmacokinetic data to help explain why oral, but not topical, moxifloxacin may cause fluoroquinolone-associated uveitis

Catch composition and fishing trend of kilka in Iranian part of the Caspian Sea

Population structure of three kilka fishes (Clupeonella spp.), particularly anchovy kilka (C. engrauliformis), in Iranian waters of the Caspian Sea was surveyed in 2003. A total of 3230 biweekly samples were collected from commercially landed kilka at 3 stations in Mazandaran and Guilan provinces. Catch and effort statistics were obtained from the relevant organization. Results showed a great decline in the commercial kilka catch from 95000 tons in 1999 to 15497 tons in 2003. The contribution of anchovy kilka to the total kilka fishery also showed a decline from 71% in 1999 to 52.5% in 2003, while common kilka (C. cultriventris) increased from 13.7% in 1999 to 48.9% in 2003. Fork length range of anchovy kilka showed an increase from 89.2±12mm in 1999 to 100.4±4.9mm in 2003. The age composition of anchovy ranged between 1+ to 7+ years and the dominant group was 5+ years old (age group of 4+ and 5+ comprised 84.6% of population). The K value and L∞ calculated 0.598/year and 110.13 mm respectively. Natural, fishing and total mortality coefficient was estimated 0.69, 0.31 and 1 per year respectively. The results showed a sex ratio of F:M= 68.2:31.8

Momentum-dependent relaxation dynamics of the doped repulsive Hubbard model

We study the dynamical behavior of doped electronic systems subject to a global ramp of the repulsive Hubbard interaction. We start with formulating a real-time generalization of the fluctuation-exchange approximation. Implementing this numerically, we investigate the weak-coupling regime of the Hubbard model both in the electron-doped and hole-doped regimes. The results show that both local and nonlocal (momentum-dependent) observables evolve toward a thermal state, although the temperature of the final state depends on the ramp duration and the band filling. We further reveal a momentum-dependent relaxation rate of the distribution function in doped systems and trace back its physical origin to the anisotropic self-energies in the momentum space

Streets of Islamic Cairo : a configuration of urban themes and patterns

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1981.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH.Bibliography: p. 92-93.This study presents a closer look at a Muslim-built environment. It examines streets as one of the major structuring elements in a city. It traces the history and the physical development of three major streets in Medieval Cairo within the overall structure of the city at the end of each ruling dynasty. The hypothesis presented in this study is that streets in a Muslim city (Cairo) possessed some common themes and patterns that created for them a characteristic structure. The purpose of this study is to verify the existence of such a structure and to explore some of the implicit principles that may have governed its shaping The lessons learnt from the analysis of the street structure and its development, provide a better understanding of the history of a built environment and of the physical factors that shaped its urban form. Ultimately, it may be possible to generate from the study a general set of criteria ·which could identify the extent of traditionality in a given project. These rules could also assist urban designers in the formulation of design criteria extracted from the history of the built environment.by Nezar M. Al-Sayyad.M.S