FIXED POINT THEOREMS OF WEAKLY MONOTONE PREŠIĆ TYPE MAPPINGS IN ORDERED CONE METRIC SPACES

Khan, Mohammad Saeed,Shukla, Satish,Kang, Shin Min Korean Mathematical Society 2015 대한수학회보 Vol.52 No.3

In this paper, we introduce the weakly monotone $Pre{\check{s}}i{\acute{c}}$ type mappings in product spaces when the underlying space is an ordered cone metric space. Some fixed point results for such mappings are also proved which generalize and unify several known results in metric and cone metric spaces with normal cone. The results are supported by examples.

Qualitative study of the fractional order nonlinear chaotic model: electronic realization and secure data enhancement

Khan Najeeb Alam,Akbar Saeed,Qureshi Muhammad Ali,Hameed Tooba,Khan Nadeem Alam 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.78 No.2

In this work, we explore the superposition of two well-known chaotic oscillators, namely, the Duffing double-well and the forced van der Pol with the fractional order derivative. The proportional fractional derivative has been taken for numerical simulations and highly chaotic solution to improve some information of security systems has been found. The existence and the uniqueness of a super system are stated in the form of theorems using the Lipschitz condition locally. The qualitative properties of chaotic dynamics are described by mean of Lyapunov exponent (LE), eigenvalues, bifurcation and Poincaré maps. The analog circuit is also intended, with the help of different physical instruments, to validate the superposition of chaotic systems. The randomness level of a superposition chaotic system is tested via standard test suite, and the qualified set of a 32-bit array with high haphazardness is used for encryption as well as decryption. Furthermore, a security analysis is performed using different parameters, such as the uncertainty, similarity etc. The outcomes for the properties, time evolution, phase portrait, and oscilloscopic views are presented in tabulated and graphical forms.

Photocatalytic degradation of bromophenol blue in aqueous medium using chitosan conjugated magnetic nanoparticles

Hamayun Khan,Abdul Kabir Khalil,Adnan Khan,Khalid Saeed Ibrahim,Nauman Ali 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.10

Three different chitosan conjugated magnetic nanoparticles (CCMN) of Co, Ni and Fe were prepared using co-precipitation method. The prepared CCMN were characterized by scanning electron microscopy (SEM), Xray diffraction (XRD) and Fourier transform infra-red (FT-IR) spectroscopic techniques. The SEM results showed a smooth surface morphology with almost uniform particle size and irregular shape structure for all CCMN. The XRD study revealed the crystalline structure in case of Co-CCMN and Ni-CCMN, while amorphous nature of Fe-CCMN was observed. The particle size of the prepared CCMN was found to be <95 nm, as confirmed from SEM and XRD analyses. Similarly, FT-IR analysis showed the incorporation and conjugation of Co, Ni and Fe magnetic nanoparticles into the chitosan polymer matrix. The point of zero charge (PZC) was found to be 7.41 for Co-CCMN and Ni-CCMN and 7.70 for Fe-CCMN. The photocatalytic activity of the prepared CCMN was investigated under UV light irradiation (254 nm and 15 W) in the aqueous medium using bromophenol blue (BPB). The photocatalytic process was monitored by UV-visible spectrophotometer for different irradiation times (0 to 10 h). The results showed that all the prepared CCMN displayed good to excellent photocatalytic property where the highest degradation was exhibited by Fe-CCMN (94.5%), followed by Co-CCMN (85.1%) and Ni-CCMN (83.0%). The prepared catalysts were recycled and reused, maintaining good photocatalytic activity for four consecutive batches.

Paraplegia Following Spinal Cord Contusion from an Indirect Gunshot Injury

Khuram Khan,Beatrice Dieudonne,Saqib Saeed,Sara Alothman,Yasir Saeed,Sanjiv Gray,Khuram Khan 대한신경손상학회 2018 Korean Journal of Neurotrauma Vol.15 No.1

Spinal cord injuries are debilitating and life threatening. Paraplegia due to direct traumatic gunshot injury to the spinalcord is common. The most common cause of spinal cord injury is road traffc accidents. This is followed by spinal cord injury due to a fall from a height. Most of the spinal cord injuries due to gunshot wounds occur as a result of direct traumatic effects. We present a rare case of a 49-year-old male with trauma. He developed paraplegia after a gunshot wound injuryto the neck and contusion to the spinal cord, with no direct trauma. Paraplegia due to direct gunshot injury can have manydifferent outcomes. In our case, the patient was managed conservatively, and the outcome was favorable

FIXED POINT THEOREMS OF WEAKLY MONOTONE PREˇSI´C TYPE MAPPINGS IN ORDERED CONE METRIC SPACES

Mohammad Saeed Khan,Satish Shukla,강신민 대한수학회 2015 대한수학회보 Vol.52 No.3

In this paper, we introduce the weakly monotone Preˇsi´c type mappings in product spaces when the underlying space is an ordered cone metric space. Some fixed point results for such mappings are also proved which generalize and unify several known results in metric and cone metric spaces with normal cone. The results are supported by examples.

Adsorption of Cu (II) Ion through Functionalized Nylon 66 and their Utilization as Photocatalyst for the Photodegradation of Eriochrome Black T Dye in Aqueous Medium

Nasib Khan,Idrees Khan,Noor Zada,Khalid Saeed Ibrahim 한국섬유공학회 2022 Fibers and polymers Vol.23 No.5

Removal of toxic pollutants such as heavy metals and dyes from water has received great attention due to asignificant decline in the clean water level, worldwide. Herein, we attempted to remove both metals and dyes using a singlematerial. Nylon 66 (nylon) films were prepared and then functionalized with nitric acid. The functionalized nylon 66 (Fnylon)was utilized for the adsorption of copper (II) (Cu(II)) ions from an aqueous solution. The adsorption study revealed theefficient adsorption of Cu (II) ions through F-nylon. Moreover, the adsorption data were fitted to Langmuir, Freundlich, andTemkin isotherms, and the values are best fitted to Langmuir isotherm as compared with Freundlich isotherm. The nylon 66,F-nylon, and Cu/F-nylon were characterized through scanning electron microscopy (SEM), energy dispersive X-ray (EDX),Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). SEM of F-nylon samples showedhighly porous surface and membrane-like appearance that is suitable for the metal adsorption. The EDX analysis confirmedthe overall elemental composition of the adsorbed copper on F-nylon surface. FTIR was helpful to confirm the introductionof new functional groups after modification of nylon, while TGA analysis demonstrated significant thermal stability of allsamples. The copper adsorbed F-nylon 66 (Cu/F-nylon) was further utilized as a photocatalyst for the photodegradation ofEriochrome Black T (EBT) dye. Cu/F-nylon and recovered Cu/F-nylon films degraded about 93 and 89.3 % EBT dye within240 min, respectively. The optimum conditions for EBT photodegradation were pH 6, 0.05 g photocatalyst dosage, and aninitial dye concentration of 60 ppm.

Diversity of pollinators and their role in the pollination biology of chickpea, Cicer arietinum L. (Fabaceae)

Abdul Latif,Saeed Ahmad Malik,Shafqat Saeed,Naeem Iqbal,Qamar Saeed,Khalid Ali Khan,Chen Ting,Hamed A. Ghramh 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2

Chickpea (Cicer arietinum L.) is an important source of food for people worldwide. In the current study, we studied its pollination biology with special reference to floral visitors along with their visitation rate, frequency and pollen load during 2012 and 2013. We also explored the effect of floral visitors on the capsule weight, seed weight, seed numbers and seed germination. Results revealed three bees, two wasps, five flies, one moth and three butterfly species on the flowers of chickpea. Apis dorsata, A. florea, Amegilla sp. and Eristalinus aeneus were the major species with 434–474, 223–311, 69–74 and 81–136 individuals, respectively in both years. Floral visitors differed significantly in term of visitation frequency with A. florea as the most frequent visitor (9.13–9.86 visits/flower/5 min) followed by E. aeneus (5.43–5.58 visits/flower/5 min) and A. dorsata (1.72–2.31 visits/ flower/5 min) in both years. Similarly, A. florea had statistically highest visitation rate (16.85–19.99 flowers visited/min) followed by E. aeneus (9.73–10.68 flowers visited/min). A. dorsata had significantly higher pollen load on its body (84629–85,104 pollen grains) followed by A. florea (64940–65,135 pollen grains) and Amegilla sp. (64020–65,120 pollen grains). The open-pollinated flowers had significantly higher capsule weight (0.27 ± 0.01 g), seed weight (0.18 ± 0.01 g), seed numbers (1.67 ± 0.07 seeds) and seed germination (95 ± 1.38%) as compared to flowers deprived of pollinators in cages. The results suggested A. florea, A. dorsata and E. aeneus could be effective pollinators of chickpea. Hence these three species can be properly utilized on commercial scale to increase crop yield.

Quantitative Analyses of Esophageal Cancer Research in Pakistan

Qureshi, Muhammad Asif,Khan, Saeed,Ujjan, Ikram Din,Iqbal, Asif,Khan, Ramsha,Khan, Bilal Ahmed Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7

Background: Health-care research is a neglected discipline in Pakistan and research related to esophageal cancer (ranks 9th in Pakistani males and 5th in females) is no exception in this regard. Particularly, there are no data available to delineate the overall status of esophageal cancer epidemiological studies in Pakistan. This study describes the first ever effort to make a systematic quantification, in an attempt to provide a road-map to all stakeholders for designing appropriate epidemiological, diagnostic and therapeutic strategies. Materials and Methods: International (PubMed, ISI Web of Knowledge) and local (PakMedinet) scientific databases as well as Google search engine were searched using specified keywords to extract relevant publication. Well-defined inclusion criteria were implemented to select publications for final analyses. All data were recorded by at least 3 authors and consensus data were entered into and analyzed for descriptive statistics (such as frequencies, percentages and annual growth rates) using Microsoft Excel and SPSS software. Results: A total of 79 publications fulfilled the inclusion criteria including 20 publications for which full texts were not available. Of the 79 publications, 59 (74.6%) were original/research publications, 5 (6.3%) were case reports, 4 (5.1%) were research communications, 2 (2.5%) were review articles, 1 was (1.2%) correspondence and 8 (10.1%) were undefined categories. Only 13 (<20%) cities of Pakistan contributed towards the 79 publications. On average, only 1.9 relevant publications/year were published from 1976 (year of first publication) to the present. Alarmingly, a decline in the annual growth at -4.1% was recorded in the last six years. Conclusions: Esophageal cancer research is largely unfathomed in Pakistan. Urgent/dramatic steps are required by all concerned to address this common (and under reported) cancer of Pakistan.

Acetylation of Retinoblastoma Like Protein2 (Rb2/p130) in Tumor Tissues

Khan, Z.N.,Sabir, M.,Kayani, M.A.,Saeed, M. Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.4

The activity of Rb proteins is controlled by post-translational modifications, especially through phosphorylation. Acetylation of Rb2/p130 was reported recently in NIH3T3 cells but its physiological relevance in cell cycle control and tumorigenesis is still unknown. Efforts are underway to investigate possible interplay between Rb2/p130 phosphorylation and acetylation. Here we hypothesized that Rb2/p130 acetylation, like p53 acetylation, may play a role in development of the tumor phenotype. The proposed hypothesis regarding acetylation of Rb2/p130 in tumor VS normal cells was found to be true in our case study of 36 tumor samples. Statistical analysis of results suggest strong correlation among Rb2/p130 acetylation and cancer phenotype.

Fault Detection and Location in a Radial LVDC Distribution Network through Current Comparison Strategy

Saeed Zaman Jamali(사이드 자만 자말리),Syed Basit Ali Bukhari(사이드 바짓 알리 부카리),Muhammad Omer Khan(무하마드 오메르 칸),Muhammad Mehdi(무하마드 메디),Shazia Baloch(샤지아 발로츠),Kim Chul-Hwan(김철환) 대한전기학회 2018 대한전기학회 학술대회 논문집 Vol.2018 No.11