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D-patches: effective traffic sign detection with occlusion handling
Rehman, Yawar,Riaz, Irfan,Fan, Xue,Shin, Hyunchul IET 2017 IET computer vision Vol.11 No.5
<P>In advanced driver assistance systems, accurate detection of traffic signs plays an important role in extracting information about the road ahead. However, traffic signs are persistently occluded by vehicles, trees, and other structures on road. Performance of a detector decreases drastically when occlusions are encountered especially when it is trained using full object templates. Therefore, we propose a new method called discriminative patches (d-patches), which is a traffic sign detection (TSD) framework with occlusion handling capability. D-patches are those regions of an object that possess the most discriminative features than their surroundings. They are mined during training and are used for classification instead of the full object templates. Furthermore, we observe that the distribution of redundant-detections around a true-positive is different from that around a false-positive. Based on this observation, we propose a novel hypothesis generation scheme that uses a voting and penalisation mechanism to accurately select a true-positive candidate. We also introduce a new Korean TSD (KTSD) dataset with several evaluation settings to facilitate detector's evaluation under different conditions. The proposed method achieves 100% detection accuracy on German TSD benchmark and achieves 4.0% better detection accuracy, when compared with other well-known methods (under partially occluded settings), on KTSD dataset.</P>
M. Hassan,R. Irfan,S. Riaz,S. Naseem,S. S. Hussain,G. Murtaza 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.5
In this study, ZnO was doped with various concentrations of zirconium (xZr = 0 - 5 mole%), by using the co-precipitation method so as to achieve successful formation of a single-phase diluted magnetic semiconductor. X-Ray diffraction results showed that the crystal structure of Zn1−xZrxO was that of hexagonal wurtzite. The structural properties showed no additional phases at low impurity contents (xZr < 3%); however, impurity peaks belonging to ZrO2 appeared at high impurity contents (xZr 3%). The calculated ZnO lattice constants ‘a’ and ‘c’ were found to be 3.256 °A and 5.203 °A, respectively, which are in close match to the values found in the literature. For undoped ZnO, the average calculated particle size was 75.35 nm, and calculated bond length was 1.98 °A. The residual strains and the secondary phases of ZrO2 were found to affect the lattice parameters and the bond lengths. The scanning electron microscopy images showed a porous structure with non-uniform surface morphology. However, a few nano-scale dendrite-type structures were also present, indicating the potential applications of Zr-doped ZnO in nano-devices. Vibrating sample magnetometry (VSM) was employed to measure the magnetic properties, and the measurements showed undoped ZnO to be diamagnetic; however, doping with Zr induced a small ferromagnetic character at small magnetic fields. On the otherhand, a paramagnetic behavior was evident at higher magnetic fields. The magnetization at 1T was observed to degrade with increasing Zr content in the ZnO host lattice, which was due to the residual strains and the secondary phases.
Adnan Younis,Atif Riaz,Muhammad Irfan Siddique,Ki-Byung Lim,Yoon-Jung Hwang,Muhammad Asif Khan 한국화훼산업육성협회 2013 화훼연구 Vol.21 No.4
Potting media are an integral part of potted plants production system, formulated by a mixture of various raw materials to act as a substrate for plant support and source of nutrition. There is a wide range of potting media available, which are used for quality production of high-value plants worldwide. In this study, quality assessment of Dracaena plants grown in different potting media like: mushroom compost, peat, sand, farmyard manure, coconut coir, and leaf compost in different combinations were carried out. A mixture of sand, mushroom compost, coconut coir, and peat proved to be the best, by promoting root and shoot growth, leaf area, fresh and dry weights of root and shoot, and also improved overall quality of the plant. Media containing garden soil alone or a mixture of sand and leaf compost produced the lowest quality of plants with considerable reduction in most of the growth parameters. Anatomical parameters showed weak relation to media composition as compared to other morphological features. The best medium was made with sand, mushroom compost, coconut coir, peat, that produced plants with thick epidermis and larger pith cells, but thin endodermis and smaller metaxylem vessels in their roots. As moisture availability was sufficient enough in this medium combination, the development of water storing tissue may not contribute significantly. However, epidermis can play a decisive role in protecting roots from external environmental hazards.
Medicinal Plants Combating Against Cancer - a Green Anticancer Approach
Sultana, Sabira,Asif, Hafiz Muhammad,Nazar, Hafiz Muhammad Irfan,Akhtar, Naveed,Rehman, Jalil Ur.,Rehman, Riaz Ur. Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.11
Cancer is the most deadly disease that causes the serious health problems, physical disabilities, mortalities, and morbidities around the world. It is the second leading cause of death all over the world. Although great advancement have been made in the treatment of cancer progression, still significant deficiencies and room for improvement remain. Chemotherapy produced a number of undesired and toxic side effects. Natural therapies, such as the use of plant-derived products in the treatment of cancer, may reduce adverse and toxic side effects. However, many plants exist that have shown very promising anticancer activities in vitro and in vivo but their active anticancer principle have yet to be evaluated. Combined efforts of botanist, pharmacologist and chemists are required to find new lead anticancer constituent to fight disease. This review will help researchers in the finding of new bioactive molecules as it will focus on various plants evaluated for anticancer properties in vitro and in vivo.