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Majid Liaqat,Nadia Saeed,Moustafa Omar Ahmed Abu-Shawie,Rehan Ahmad Khan Sherwani 대한산업공학회 2021 Industrial Engineeering & Management Systems Vol.20 No.3
The group chain acceptance sampling plans are widely used in industrial sectors when we want to minimize the inspection by selecting number of batches representing the whole lot. The research is based on the construction of plan parameters of group chain acceptance sampling (GCAS) plan when life of the items follows Beta Burr Type-X (BB-X) distribution. The various design parameters i.e. optimum number of groups, minimum mean ratio, operating characteristic (OC) values and minimum angles are calculated by satisfying and obeying producer’s and consumer’s risks at a certain specified quality level. Assuming prefixed number of item, the scale parameters and termination time, the plan parameters are calculated. The application of proposed plan is provided on real life data set and the results of tables with the help of classical examples are also discussed for illustrative purpose.
Imran Mubashair,Khan Majid,Javed M.A.,Ahmad S.,Qayyum A. 한국물리학회 2023 Current Applied Physics Vol.50 No.-
Non-thermal cold atmospheric pressure plasma jet (APPJ) produced in multi-pulse dielectric barrier discharge (DBD) preferentially heats the electrons that subsequently transfer their energy to the other plasma species converting them into reactive species. Therefore the characterization of different energy groups of electrons is essential for efficient production and control of reactive plasma species contributing to surface modifications. Here we present the spectroscopic investigations of the APPJ produced in multi-pulse DBD using pin electrode configuration. Boltzmann plot relates the emission intensities of the several Ar–I spectral lines to their corresponding threshold excitation energies to give the electron temperature more precisely. The Stark broadening of the Ar–I (696.54 nm) line profile gives the electron number density after de-convoluting the contributions of the Doppler and instrumental broadenings. Plasma measurements correlate the gas flow rate, applied jet power across the electrodes, and a group of electrons contributing to optical emission. Sequential imaging correlates the size of the plasma bullets momentarily with the discharge pulse for different argon flow rates and applied jet powers. With an increasing flow rate of up to 1.4 L/min, the plasma plume of the jet becomes more elongated, intense, and spatially uniform. However, the glow intensity and size of the plume start reducing with a further increase in gas flow rate. Experimental findings propose plasma processing for small-scale localized plasma surface treatments.
Ahmad Jalal,Majid Ali Khan Quaid,김기범 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.4
In recent years, health-care industry has received a major boost due to sensors i.e., accelerometers, magnetometers etc., which allow its user to get instant updates about their current health status in indoor/outdoor environments. The real driving force behind the usage of accelerometer has been the fi tness industry but it also holds a prominent place in ambient smart home to monitor resident’s life-style. In this paper, we proposed a novel triaxial accelerometer-based human motion detection and recognition system using multiple features and random forest. Triaxial signals have been statistically processed to produce worthy features like variance, positive and negative peaks, and signal magnitude features. The proposed model was evaluated over HMP recognition data sets and achieved satisfactory recognition accuracy of 85.17%. The proposed system is directly applicable to any elderly/children health monitoring system, 3D animated games/movies and examining the indoor behaviors of people at home, malls and offi ces.
Factors Associated with Helicobacter Pylori Infection, Results from a Developing Country-Pakistan
Valliani, Arif,Khan, Fazal,Chagani, Bilawal,Khuwaja, Ali Khan,Majid, Syed,Hashmi, Syed,Nanji, Kashmira,Valliani, Salimah Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.1
Background: It is known that blood group antigens are related to the development of peptic ulcer and gastric carcinoma. Infections due to H. pylori are most widespread among the developing regions due to poor standard of public health. This study sought to determine the association of H. pylori with ABO blood groups, age, gender, and smoking status among inpatients at a public sector hospital in Karachi. Materials and Methods: A cross-sectional study was conducted at endoscopy suite at a public sector hospital in Karachi in the year 2011. All the symptomatic patients coming for upper GIT endoscopy were included in this study. Results: Biopsy for histopathology was taken from 93 patients, with an age range from 15-65 years. Age group of 15 to 20 years was found to be associated with H. pylori infection but without significance (p-value 0.83). In all, 36 (38.7%) turned out to be H. pylori positive with a significant male preponderance (p=0.04). Distribution of ABO blood groups in H. pylori positive group were A=31.4%, B=15.4%, AB=25.0% and O=53.7%, with a statistically significant link for blood group O (p=0.05). Rhesus factor was also compared but significant relationship was evident (p-value 0.73). Conclusions: This study demonstrated that H. pylori infection can be related to ABO blood group, middle age persons and male gender. People of blood group O are more prone to develop infection related gastritis, ulcers, and even perforations, so they should be more cautious against transmission of the bacterium.
Mojtaba Gorji Azandariani,Majid Gholhaki,Mohammad Ali Kafi,Tadeh Zirakian,Afrasyab Khan,Hamid Abdolmaleki,Hamid Shojaeifar 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.39 No.1
This research endeavor intends to use the implicit finite element method to investigate the structural response of steel shear walls with partial plate-column connection. To this end, comprehensive verification studies are initially performed by comparing the numerical predictions with several reported experimental results in order to demonstrate the reliability and accuracy of the implicit analysis method. Comparison is made between the hysteresis curves, failure modes, and base shear capacities predicted numerically using ABAQUS software and obtained/observed experimentally. Following the validation of the finite element analysis approach, the effects of partial plate-column connection on the strength and stiffness performances of steel shear wall systems with different web-plate slenderness and aspect ratios under monotonic loading are investigated through a parametric study. While removal of the connection between the web-plate and columns can be beneficial by decreasing the overall system demand on the vertical boundary members, based on the results and findings of this study such detachment can lower the stiffness and strength capacities of steel shear walls by about 25%, on average.
Ejaz Syeda Rabia,Khan Muhammad Azhar,Gulbadan Shagufta,Akhtar Majid Niaz,Ahmad Mukhtar,Hussain Altaf,Islam Misbah ul 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.4
Co 2+ and Cr 3+ -substituted SrBaCu Fe 28- y O 46 X-type hexaferrite with x = y = 0, 0.1 to 0.5 (step = 0.1) were prepared Co Cr 2- x x y through auto-combustion sol–gel method and sintered at 1250 °C for 5 h which was found from thermal analysis. The thermal investigation, phase detection, spectral, magnetic, and dielectric characteristics of the prepared composition were investigated by TGA, XRD, FTIR, VSM, and dielectric measurement. XRD patterns of the entire composition confi rmed the development of a single phase of X-type structure. The enhancement in the lattice parameters and cell volume was observed by varying the Co–Cr concentration, attributed to the larger ionic radii substitution. FTIR\spectra of all samples exhibit two absorption peaks in the wavenumber range of 500–550 cm −1 and 418–425 cm −1 that confi rm the formation of hexaferrite. The dielectric properties have been inspected based on frequency and substitution variation in the sample. The dielectric constant exhibits the increasing trend with the Co–Cr ratio. The enhancement in Ac conductivity was also found by increased substitution ions. Single semi-circles were examined in Nyquist plots, attributed to the contribution of the grain boundaries. Detailed magnetic parameters such as saturation magnetization, remanence, squareness ratio, coercivity, and magneto-crystalline anisotropy constant were measured. By the increase in Co–Cr substitution the increased of saturation magnetization ( Ms ) from 61.12 emu/g to 64.89 emu/g, the remanence ( Mr ) from 27.43 emu/g to 30.71 emu/g, and coercivity ( H c ) from 1654.56 Oe to 1863.54 Oe was found. Therefore, the synthesized SrBaCu 2 X-type hexagonal ferrites with the appropriate amount of Co–Cr substitution are suitable candidates for microwave devices and valuable in longitudinal recording media.
A Scalable Data Integrity Mechanism Based on Provable Data Possession and JARs
( Faheem Zafar ),( Abid Khan ),( Mansoor Ahmed ),( Majid Iqbal Khan ),( Farhana Jabeen ),( Zara Hamid ),( Naveed Ahmed ),( Faisal Bashir ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.6
Cloud storage as a service provides high scalability and availability as per need of user, without large investment on infrastructure. However, data security risks, such as confidentiality, privacy, and integrity of the outsourced data are associated with the cloud-computing model. Over the year`s techniques such as, remote data checking (RDC), data integrity protection (DIP), provable data possession (PDP), proof of storage (POS), and proof of retrievability (POR) have been devised to frequently and securely check the integrity of outsourced data. In this paper, we improve the efficiency of PDP scheme, in terms of computation, storage, and communication cost for large data archives. By utilizing the capabilities of JAR and ZIP technology, the cost of searching the metadata in proof generation process is reduced from O(n) to O(1). Moreover, due to direct access to metadata, disk I/O cost is reduced and resulting in 50 to 60 time faster proof generation for large datasets. Furthermore, our proposed scheme achieved 50% reduction in storage size of data and respective metadata that result in providing storage and communication efficiency.