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41.
42.
Muhammad Nawaz Naeem Madiha Gamkhar Shahid Hussain Arshad Abdul Ghafar Shah 《Journal of Mechanical Science and Technology》2013,27(3):649-656
This study gives a brief work on vibration characteristics of cylindrical shells submerged in an incompressible fluid. The shell is presumed to be structured from functionally graded material. The effect of the fluid is introduced by using the acoustic wave equation. Love’s first order thin shell theory is utilized in the shell dynamical equations. The problem is framed by combining shell dynamical equations with the acoustic wave equation. Fluid-loaded terms are associated with Hankel function of second kind. Wave propagation approach is employed to solve the shell problem. Some comparisons of numerical results are performed for the natural frequencies of simply supported-simply supported, clamped-clamped and clamped-simply supported boundary conditions of isotropic as well as functionally graded cylindrical shells to check the validity of the present approach. The influence of fluid on the submerged functionally graded cylindrical shells is noticed to be very pronounced. 相似文献
43.
Synergistic Tumor Therapy: Porous Gold Nanoshells on Functional NH2‐MOFs: Facile Synthesis and Designable Platforms for Cancer Multiple Therapy (Small 35/2018) 
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Naveed Ahmed Kashif Ishfaq Madiha Rafaqat Salman Pervaiz Saqib Anwar Bashir Salah 《Materials and Manufacturing Processes》2019,34(7):769-778
Titanium and its alloys especially Ti-6Al-4V are being widely used numerous application areas. In addition to have iconic properties, Ti-6Al-4V is considered as challenging material in machining perspective that is why it has captured global research focus. In this research, electric discharge machining of Ti-6Al-4V has been carried out by employing four different types of electrode materials (graphite, aluminum, copper, and brass) assigned with two alternate polarities (positive and negative). Selection of the most appropriate tool material and electrode polarity is the important aspect needed to be explored for this alloy. In addition to polarity, discharge current, and pulse time ratio have been considered as process variables owing to have their direct influence in electric discharge machining. Taguchi L9 array has been employed for each of the four electrodes with positive polarity and similarly L9 with negative polarity. Thus, a total number of 72 experiments have been conducted. Tool wear rate and overcut (OC) around the machined surfaces are the response characteristics to be investigated in order to achieve minimum amounts of both of these two responses. Selection of the most suitable tool with common tool polarity has been carried out meeting the decision criteria of minimum tool wear and minimum OC. 相似文献
45.
Madiha Amjad Hassaan Khaliq Qureshi Sobia Jangsher 《Transactions on Emerging Telecommunications Technologies》2019,30(2)
For achieving high bandwidth, fast, and robust communication in 5G, multiple technologies are needed to work under heterogeneous networks. Visible light communication, due to its high bandwidth, low latency, and small interference area, will be a significant part of 5G along with mmwave. In this paper, a new frame structure has been proposed that implements reserve before transmit scheme. In this scheme, the active portion of the frame starts with contention access‐based reservation period (RP) followed by access point response (RES Reply) and TDMA‐based guaranteed time slots for successful nodes. In contrast to fixed slot assignment in TDMA, contention‐based reservation avoids idle slot wastage due to fixed allotment. Moreover, small reserve packets keep medium busy for a short time, the benefit of which is a lower probability of failed channel access. The proposed scheme has been compared with IEEE 802.15.7 for a sufficiently large length of RP. A Markov model of the system has been developed for analyzing the effect of RP length on the network performance. The result depicts that reserve before transmit–based frame structure provides an increase of 170% in reliability and decrease of 80% in channel access delay as compared to existing IEEE 802.15.7 CSMA/CA‐based access. 相似文献
46.
Huma Bader Ul Ain Farhan Saeed Muhammad Asif Khan Bushra Niaz Madiha Rohi Muhammad Adnan Nasir Tabussam Tufail Friha Anbreen Faqir Muhammad Anjum 《Food Science & Nutrition》2019,7(5):1816-1820
The current research was carried out to observe the effect of different thermal treatments on soluble and insoluble dietary fiber ratio to improve functional properties of barley. Two varieties of barley labeled as Haider‐93 and Jau‐87 were milled and then wet and dry heat‐treated. Soaking and then cooking of soaked and nonsoaked barley was performed. Untreated barley contained more insoluble dietary fiber (12.00–12.40 g/100g dm) than soluble dietary fiber (4.73–5.70 g/100g dm). Additionally, the modification of soluble (13.32%) and insoluble dietary fiber (8.79%) ratio through pressure cooking was nonsignificant while roasting showed significant results, that is, 53.91% increase in soluble dietary fiber and 8.79% decrease in insoluble dietary fiber. In phase II, cooking without soaking gave highest results, that is, 68.08% increase in soluble dietary fiber and 15.48% decrease in insoluble dietary fiber. Conclusively, among all treatments of phase I and II, the better results were shown by cooking without soaking. 相似文献
47.
Chuang Liu Lijia Luo Leyong Zeng Jie Xing Yuanzhi Xia Shan Sun Luyun Zhang Zhe Yu Junlie Yao Zhangsen Yu Ozioma Udochukwu Akakuru Madiha Saeed Aiguo Wu 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(35)
AuroShell nanoparticles (sealed gold nanoshell on silica) are the only inorganic materials that are approved for clinical trial for photothermal ablation of solid tumors. Based on that, porous gold nanoshell structures are thus critical for cancer multiple theranostics in the future owing to their inherent cargo‐loading ability. Nevertheless, adjusting the diverse experimental parameters of the reported procedures to obtain porous gold nanoshell structures is challenging. Herein, a series of amino‐functionalized porous metal–organic frameworks (NH2‐MOFs) nanoparticles are uncovered as superior templates for porous gold nanoshell deposition (NH2‐MOFs@Aushell) by means of a more facile and general one‐step method, which combines the enriched functionalities of NH2‐MOFs with those of porous gold nanoshells. Moreover, in order to illustrate the promising applications of this method in biomedicine, platinum nanozymes‐encapsulated NH2‐MOFs are further designed with porous gold nanoshell coating and photosensitizer chlorin e6 (Ce6)‐loaded nanoparticles with continuous O2‐evolving ability (Pt@UiO‐66‐NH2@Aushell‐Ce6). The combination of photodynamic and photothermal therapy is then carried out both in vitro and in vivo, achieving excellent synergistic therapeutic outcomes. Therefore, this work not only presents a facile strategy to fabricate functionalized porous gold nanoshell structures, but also illustrates an excellent synergistic tumor therapy strategy. 相似文献