P A College of Engineering

About: P A College of Engineering is a based out in . It is known for research contribution in the topics: Dihedral angle & Ring (chemistry). The organization has 298 authors who have published 594 publications receiving 4888 citations.

Low Power Adder Based Digital Filter for QRS Detector

Abstract: Most of the Biomedical applications use dedicated processors for the implementation of complex signal processing. Among them, sensor network is also a type, which has the constraint of low power consumption. Since the processing elements are the most copiously used operations in the signal processors, the power consumption of this has the major impact on the system level application. In this paper, we introduce low power concept of transistor stacking to reduce leakage power; and new architectures based on stacking to implement the full adder and its significance at the digital filter level for QRS detector are implemented. The proposed concept has lesser leakage power at the adder as well as filter level with trade-off in other quality metrics of the design. This enabled the design to be dealt with as the low-power corner and can be made adaptable to any level of hierarchical abstractions as per the requirement of the application. The proposed architectures are designed, modeled at RTL level using the Verilog-HDL, and synthesized in Synopsys Design Compiler by mapping the design to 65 nm technology library standard cells.

(2E)-3-(4-Chloro-phen-yl)-1-(4-hy-droxy-phen-yl)prop-2-en-1-one.

Abstract: In the title compound, C15H11ClO2, the dihedral angle between the mean planes of the chloro­benzene and hy­droxy­benzene rings is 6.5 (6)°. The mean plane of the prop-2-en-1-one group makes an angle of 18.0 (1)° with the hy­droxy­phenyl ring and 11.5 (1)° with the chloro­phenyl ring. The crystal packing is stabilized by inter­molecular O—H⋯O hydrogen bonds, weak C—H⋯O, C—H⋯π and π–π stacking inter­actions [centroid–centroid distances = 3.7771 (7) and 3.6917 (7) A].

3-Chloro-4-fluoro­anilinium picrate

Abstract: In the title picrate salt of a dihalogenated aniline derivative, C6H6ClF+·C6H2N3O7−, the intra­cyclic C—C—C angles in the picrate anion cover a broad range [111.95 (12)–125.38 (13)°], while those in the aromatic cation span a much narrower range [118.25 (14)–122.33 (13)°]. In the crystal, classical N—H⋯O hydrogen bonds, as well as C—H⋯O contacts, connect the ions into layers parallel to (001).

Design and Development of Proactive Solutions for Mitigating Denial-of-Service Attacks

Abstract: Denial of Service attacks, orchestrated by a single host or multiple hosts in a coordinated manner, has become an increasingly frequent disturbance in today's Internet. Generally, attackers launch DDoS attacks by directing a massive number of attack sources to send useless traffic to the victim. The victim's services are disrupted when its host or network resources are occupied by the attack traffic. The threat of DDoS attacks has become even more severe as attackers can compromise a huge number of computers using vulnerabilities in popular operating systems [4]. This paper deals with Denial of service (DoS) and Distributed DoS (DDoS) attacks. In the first part, we categorize existing defense mechanisms, and analyze their strengths and weaknesses. In the second part of our investigation, we develop and evaluate two defense models for DoS attacks: the Secure Overlay Services (SOS) Model and the Server Hopping Model using distributed firewalls. Each of these models provide defense in a different part of the network, and has different resource requirements. In the third part of our investigation, we assess the effectiveness of our defense models for different types of DoS attack.

1-(6-Fluoro-1,3-benzothia­zol-2-yl)-2-(1-phenyl­ethyl­idene)hydrazine

Abstract: The asymmetric unit of the title compound, C15H12FN3S, consists of two independent mol­ecules with comparable geometries In one mol­ecule, the 1,3-benzothia­zole ring system (rms deviation = 0011 A) forms a dihedral angle of 1986 (6)° with the phenyl ring The corresponding rms deviation and dihedral angle for the other mol­ecule are 0014 A and 2232 (6)°, respectively In the crystal, mol­ecules are linked via N—H⋯N, C—H⋯F and C—H⋯N hydrogen bonds into a three-dimensional network The crystal studied was a non-merohedral twin with a refined BASF value of 0301 (2)