No abstract

A novel compact size ultrawide band planar antenna with band notched characteristics is present. The band rejection characteristic is achieved by loading a pair of metamaterial inspired rectangular split ring resonator (SRR) near the feed line and by etching the SRR slots on a radiating patch. The simulated and measured results reveal that the proposed antenna exhibits the impedance bandwidth over the ultrawide band (UWB) frequency range from 3.1 to 14 GHz with the voltage standing wave ratio less than 2 except for band stop bands at 3.29 to 3.7 GHz (WiMAX band), 3.7 to 4.10 GHz (C-band), 5.1 to 5.9 GHz (WLAN band), and 7.06 to 7.76 GHz (downlink X-band satellite communication), respectively. The proposed antenna fabricated on low-cost FR-4 substrate has compact size of 24 × 20 × 1.6 mm3. The simulation results are compared with measured results and demonstrate good agreement with stable gain over pass bands. The proposed antenna also exhibits dipole-like radiation pattern in E-plane and omni-directional pattern in H-plane. These results led to conclusion that the presented antenna is a suitable candidate for ultrawide band UWB applications with desired band notch characteristics.

Nowadays, the demand for low-cost, compact, and interference rejected antennas with ultrawideband capability has been increased. Metamaterial-inspired loaded structures have capability of providing exceptional solutions for narrow range wireless communication and low consuming power while transmitting and receiving the signal. It is a difficult task to construct ideal metamaterial-inspired antennas with a variety of features such as extremely large bandwidth, notching out undesirable bands, and frequency. Metamaterial-inspired structures such as SRR and CSRR, and triangle-shaped TCSRR are most commonly used structures to achieve optimized characteristics in ultrawideband antennas. In this paper, an extensive literature survey is accomplished to get conception about metamaterial-inspired patch antennas. This review paper elucidates variants of metamaterial-inspired structures/resonators utilized in order to acquire sundry applications such as WiMAX, WLAN, satellite communication, and radar. Various researchers have used different methodology to design, stimulate, and analyze the metamaterial-inspired structure loaded antennas. Also, the results of different metamaterial-inspired antennas such as bandwidth, gain, return loss, and resonant frequency have been also represented in this paper. This manuscript also gives brief introduction about the metamaterial, its types, and then its application in microstrip patch antenna over the last decade. This manuscript throws light over the various studies conducted in the field of metamaterial-inspired antenna in the past. It has been seen that with the inclusion of metamaterial in conventional antenna, various characteristics such as impedance bandwidth, reflection coefficient, gain, and directivity have been improved. Also, frequency rejection of narrow bands which exits in ultrawideband frequency range can be done by embedding metamaterial-inspired structures such as SRR and CSRR.

No abstract

No abstract

Plantain or unripe banana is a starchy food that contains a high proportion of indigestible compounds, such as resistant starch, non-starch polysaccharides and is gluten free. The objective of this study was to analyze the functional and pasting properties of plantain flour (PF) for preparation of gluten free muffins. Plantain flour had more water absorption (2.62 g/g), oil absorption (1.92 g/g), swelling power(10.75) and better pasting properties as compared to wheat flour (WF). Muffins were prepared from whole plantain flour and compared with wheat flour muffins. Muffins were evaluated for specific volume, color and sensory parameters. PF muffins had more content of Ca (27.18 mg/Kg), Mg (17.21 mg/Kg), K (122.2 mg/Kg), specific volume (2 cc/g), lighter in color and liked more by sensory panel as compared to WF muffins. The possibility of developing gluten free products with PF can expand the product supply for people with celiac disease and contribute to a more diverse diet.

No abstract

Cloud computing is the most dynamic field of IT industry. It is becoming very famous due to its less resource consuming and higher output. Though Cloud computing is very vast and useful technology but it is not remained untouched from attackers or hackers. The most common attack notified on the cloud environment is DDoS attack. DDoS attacks i.e. Distributed Denial of service attacks happens on a cloud environment in such a way that, two or more than two attackers sends the multiple SOAP requests at the same cloud server and consume all the legitimate resources. From the study it has been concluded that, none a system is developed so far to prevent the DDoS attacks completely because even the detection of DDoS attacks is a major issue and prevention is a very big thing to achieve after detection and mitigation. This paper is focused on underlying the introduction about DDoS attacks and the next part of the paper is followed by the comparative analysis of the different techniques and algorithms used in detecting the DDoS attacks in cloud environment.