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Disruptive Factors and Customer Satisfaction at Chain Stores in Karachi, Pakistan
Aamir RASHID(Aamir RASHID ),Rizwana RASHEED(Rizwana RASHEED ),Noor Aina AMIRAH(Noor Aina AMIRAH ),Asyraf AFTHANORHAN(Asyraf AFTHANORHAN ) 한국유통과학회 2022 유통과학연구 Vol.20 No.10
Purpose: This study aims to determine the relationship between disruptive factors and customer satisfaction at chain stores. Survey-based questionnaires were designed in the distribution technique to measure the findings in this study. Research design, data, and methodology: In terms of the sampling technique, the researchers adopted the simple random sampling technique with a total of 200 sample sizes. For the statistical method, the researchers applied multiple linear regression analysis to determine the potential factors that affect customer satisfaction at chain stores. The analysis of this study measured how product quality, pricing policies of chain stores, design and layout, responsiveness, and location of chain stores impart their roles in customer satisfaction. Results: This study found a significant relationship between the product quality and location of chain stores on customer satisfaction. In addition, the responsiveness, pricing policy, and physical design of chain stores impart an insignificant role in customer satisfaction. However, it is proven that the location of chain stores and product quality positively impact customer satisfaction. Conclusions: The study is geographically limited to the region of Karachi, Pakistan. Therefore, the findings may differ in the context of study implications in the other areas.
Design and Analysis of RF MEMS Cantilever Switches for Parameter Enhancement
Aamir Saud Khan,Thangavelu Shanmuganantham 한국전기전자재료학회 2018 Transactions on Electrical and Electronic Material Vol.19 No.3
This paper investigates some of the disadvantages of Radio Frequency Micro Electro Mechanical System (RF MEMS)switches, such as high actuation voltage and high switching time. RF MEMS switches are among the most widely usedtechnologies since the past two decades owing to their abundant advantages such as low insertion loss, high isolation loss,low power consumption, and very high Q. In this paper, we focus on reducing the high actuation voltage and high switchingtime; a novel design of an RF MEMS metal contact switch was proposed and designed using the software Intellisuite 8.7v,and simulations were performed by fi nite element modeling. Analysis was carried out by the electrostatic actuation method. The actuation voltage depends on the spring constant, area of the actuation electrode, and air gap. From the simulation, weobtained a very low actuation voltage (1.2 V) and low switching time (approximately 7.98 μs).
압전-마찰전기 복합 소재 기반의 고출력 에너지 하베스팅 기술 개발 리뷰
Aamir Rasheed,박현제(Hyunje Park),손민균(Min Kyun Sohn),이태형(Tae Hyeong Lee),강대준(Dae Joon Kang) 한국세라믹학회 2020 세라미스트 Vol.23 No.1
Global effort has resulted in tremendous progress with energy harvesters that extract mechanical energy from ambient sources, convert it to electrical energy, and use it for systems such as wrist watches, mobile electronic devices, wireless sensor nodes, health monitoring, and biosensors. However, harvesting a single energy source only still pauses a great challenge in driving sustainable and maintenance-free monitoring and sensing devices. Over the last few years, research on high-performance mechanical energy harvesters at the micro and nanoscale has been directed toward the development of hybrid devices that either aim to harvest mechanical energy in addition to other types of energies simultaneously or to exploit multiple mechanisms to more effectively harvest mechanical energy. Herein, we appraise the rational designs for multiple energy harvesting, specifically state-of-the-art hybrid mechanical energy harvesters that employ multiple piezoelectric and triboelectric mechanisms to efficiently harvest mechanical energy. We identify the critical material parameters and device design criteria that lead to high-performance hybrid mechanical energy harvesters. Finally, we address the future perspectives and remaining challenges in the field.
Aamir Javed,Manjula Kannasandra Ramaiah,Muralidhar Srinivasaih Talkad 대한산부인과학회 2019 Obstetrics & Gynecology Science Vol.62 No.6
ObjectiveThe male reproductive system generates, accumulates, and transports the sperm. In this study, 2 methods of surgicallyretrieving sperm, namely, testicular sperm aspiration (TESA) and percutaneous epididymal sperm aspiration (PESA), arediscussed and studied in men aged ≤38 years to achieve successful conception using assisted reproductive technology. The purpose was to assess the fertilization rate (FA), clinical pregnancy, and live birth rate (LBR) with sperm. MethodsA total of 287 semen samples were divided into 4 groups as follows: fresh PESA (n=73), frozen PESA (n=65), fresh TESA(n=128), and frozen TESA (n=21). The DNA fragmentation test using sperm chromatin dispersion assay was measuredand reported. ResultsFA was 70.3% and 65.5%, (P<0.022) for fresh and frozen epididymal sperm and 53.8% and 49.5%, (P<0.032) for freshand frozen testicular sperm. LBR was 33.6% and 30.2% (P<0.075) for fresh and frozen epididymal sperm (PESA) and22.7% and 18.2% (P<0.063) for fresh and frozen-thawed TESA sperm. ConclusionExposure to tissue shearing may adversely affect sperm quality. Increased sperm DNA damage due to long-termexposure while teasing enhances reactive oxygen species production foremost to membrane damage because ofthe oxidation of polyunsaturated fatty acid in lipids (lipid peroxidation), oxidation of amino acid in proteins, andinactivation of specific enzymes, all leading to enzymatic dipping and possibility of less fertilization and conception asindicated by the increase in LBR with fresh/frozen PESA compared to with fresh/frozen TESA.