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Search Results: 1 - 10 of 3833 matches for " Aziz-ur-Rehman "
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Factors Affecting Software Cost Estimation in Developing Countries
Ali Javed,Mirza Ahsan Ullah,Aziz-ur-Rehman
International Journal of Information Technology and Computer Science , 2013,
Abstract: Cost is the main driving factor for all projects. When it is done correctly, it helps in the successful completion of the project. In this research we have discussed various factors that affect the estimation procedure. These include team structure, team culture, managerial style, project type (Core application or integrated application), client’s working environment. Accurate estimation is far difficult in developing countries where most of the organizations follow local standards. These inaccurate estimations lead to late delivery, less profit or in worst case complete failure. Software requirement gathering, development, maintenance, quality assurance and cost of poor quality are major groups responsible for overall cost in software production process. The exact proportion among them varies significantly in consecutive software releases, which is caused by many factors. The ever increasing need for the reliability of the software systems, especially mission critical applications in the public safety domain, raises the bar for the accuracy of prediction and estimation techniques. The accuracy of estimations in many areas brings about more concerns regarding techniques already used in the software industry. Widely deployed techniques, such as Wideband Delphi method, stress the engineering and technical aspects of the process of how estimates are prepared.
Comparative Analysis of Different Fabric Defects Detection Techniques
Ali Javed,Mirza Ahsan Ullah,Aziz-ur-Rehman
International Journal of Image, Graphics and Signal Processing , 2013,
Abstract: In last few years’ different textile companies aim to produce the quality fabrics. Major loss of any textile oriented company occurs due to defective fabrics. So the detection of faulty fabrics plays an important role in the success of any company. Till now most of the inspection is done using human visual. This way is too much time consuming, cumbersome and prone to human errors. In past, many advances are made in developing automated and computerized systems to reduce cost and time whereas, increasing the efficiency of the process. This paper aims at comparing some of these techniques on the basis of classification methods and accuracy.
1-Chloromethyl-3-nitrobenzene
Muhammad Athar Abbasi,Muhammad Jahangir,Mehmet Akkurt,Aziz-ur-Rehman
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810005076
Abstract: In the title molecule, C7H6ClNO2, the plane of the nitro group and the direction of the chloromethyl group are twisted away from the benzene ring, forming dihedral angles of 8.2 (3) and 67.55 (12)°, respectively. In the crystal structure, weak intermolecular C—H...O interactions link the molecules into corrugated sheets parallel to the bc plane.
N-(2-Hydroxy-1,1-dimethylethyl)-4-methylbenzenesulfonamide
Aziz-ur-Rehman,Amina Yasin,Mehmet Akkurt,Nadia Abbas
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811000614
Abstract: In the title molecule, C11H17NO3S, the S atom has a distorted tetrahedral geometry [maximum deviation: O—S—O = 119.08 (9)°]. In the crystal, molecules are connected by intermolecular N—H...O, O—H...O and C—H...O hydrogen bonds, forming layers of molecules aligned parallel to (110). The 2-methylpropan-1-ol group of the molecule is disordered over two positions with an 0.592 (4):0.408 (4) occupancy ratio.
6-Hydroxymethyl-4-methoxy-2H-pyran-2-one (Opuntiol)
Muhammad Athar Abbasi,Tayyaba Shahzadi,Mehmet Akkurt,Aziz-ur-Rehman
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809053860
Abstract: The title compound, C7H8O4, isolated from Opuntia dillenii Haw (Cactaceae), is almost planar [maximum deviation of 0.027 (2) ] except for the H atoms of the methylene and methyl groups. The crystal packing is stabilized by C—H...O and O—H...O intermolecular hydrogen bonds, resulting in the formation of a three-dimensional network.
N-(3-Ethoxyphenyl)-4-methylbenzenesulfonamide
Aziz-ur-Rehman,Asia Siddiqa,Mehmet Akkurt,Muhammad Athar Abbasi
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810022427
Abstract: In the title compound, C15H17NO3S, the two aromatic rings make a dihedral angle of 69.42 (9)° with each other and the bridging C—N—S—C torsion angle is 65.76 (16)°. Weak intramolecular C—H...O interactions may affect the molecular conformation. Two neighbouring molecules generate a hydrogen-bonded dimer about a center of inversion through a pair of intermolecular N—H...O interactions, forming an R22(8) ring motif. Furthermore, two intermolecular C—H...π interactions contribute to the stability of the crystal packing.
2-Amino-1,3-benzothiazol-3-ium dihydrogen phosphate
Sabahat Zahra Siddiqui,Usama Waqas,Mehmet Akkurt,Aziz-ur-Rehman
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810025547
Abstract: The cation of the title compound, C7H7N2S+·H2PO4 , is almost planar (r.m.s deviation = 0.017 for all non-H atoms). In the crystal structure, the cations and anions are connected by N—H...O and O—H...O hydrogen bonds, with π–π stacking interactions between neighbouring 1,3-thiazole and benzene rings [centroid–centroid distance = 3.5711 (11) ], forming a three-dimensional network.
N-Ethyl-N-(2-methoxyphenyl)benzenesulfonamide
Aziz-ur-Rehman,Humaira Rafique,Mehmet Akkurt,Nabila Dilber
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810023287
Abstract: In the title molecule, C15H17NO3S, the C—S—N—Cbenzene torsion angle is 81.45 (16)°, and the two aromatic rings form a dihedral angle of 45.83 (12)°. In the crystal structure, weak intermolecular C—H...O hydrogen bonds link the molecules into chains parallel to the b axis.
N-Benzyl-N-(2-methoxyphenyl)benzenesulfonamide
Aziz-ur-Rehman,Wajeeha Tanveer,Mehmet Akkurt,Almas Sattar
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810043369
Abstract: In the title molecule, C20H19NO3S, the dihedral angle between the phenyl rings is 48.93 (18)°, and they make dihedral angles of 38.37 (17) and 86.50 (19)° with the benzene ring. A weak intramolecular C—H...O interaction might stabilize the molecular conformation. In the crystal, weak π–π stacking interactions between the benzene rings [centroid–centroid distance = 3.774 (2) ] may help to establish the packing.
N-(2-Hydroxy-1,1-dimethylethyl)benzenesulfonamide
Aziz-ur-Rehman,Nadia Abbas,Mehmet Akkurt,Muhammad Athar Abbasi
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810044144
Abstract: In the title molecule, C10H15NO3S, the S atom is bonded in a distorted tetrahedral geometry. In the crystal structure, intermolecular N—H...O, O—H...O and weak C—H...O hydrogen bonds connect the molecules to form a two-dimensional network parallel to (100). The 2-methylpropan-1-ol group is disordered over two orientations with occupancies of 0.570 (3) and 0.430 (3).
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