Výsledky vyhledávání - "Usman Bhutta"

Akademický článek

Severe Hypocalcemia due to Denosumab in Metastatic Prostate Cancer

Autor: Mohammed Muqeet Adnan, Usman Bhutta, Tanzeel Iqbal, Sufyan AbdulMujeeb, Lukas Haragsim, Syed Amer

Publikováno v: Case Reports in Nephrology, Vol 2014 (2014)

Denosumab is a monoclonal antibody used for prevention of skeletal-related events (SREs) in patients with bone metastases from solid tumors. Hypocalcemia is a rare and dangerous side effect of the drug Denosumab. We present a case of a patient with m

Externí odkaz: https://doaj.org/article/b638cef8c6a042dabc05fed57d5d56f8

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Experimental Investigation of Engine Valve Train Friction Considering Effects of Operating Conditions and WPC Surface Treatment

Autor: Muhammad Usman Bhutta, Muhammad Huzaifa Najeeb, Muhammad Usman Abdullah, Samiur Rahman Shah, Muhammad Khurram, Riaz Ahmad Mufti, Kiyotaka Ogawa, Jawad Aslam, Rehan Zahid, Mian Ashfaq Ali, Muazzam Arshad

Publikováno v: Materials; Volume 16; Issue 9; Pages: 3431

Reduction in friction ensures fuel economy, control on emissions and durability of components in internal combustion engines. A modern gasoline internal combustion engine was instrumented to determine the friction values at the cam–roller interface

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e37054a9fe69ab0e39d6b57c53301442

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Nexus between Volatility of Stocks and Macroeconomic Factors during Global Financial Crisis: Evidence from Conventional & Islamic Stocks

Autor: Majid Imdad Khan, Muhammad Usman Bhutta, Waheed Akhter

Publikováno v: Journal of Accounting and Finance in Emerging Economies. 6:465-473

Purpose: The study explores the relationship between the volatility of stock return of markets (Islamic & conventional) and macroeconomic factors by using GARCH in Mean (1,1) model during global financial crisis. Design/Methodology/Approach: monthly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d9bb23df872d42cfb5d6161006f6974
https://doi.org/10.26710/jafee.v6i2.1197

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A Review of Friction Performance of Lubricants with Nano Additives

Autor: Rehan Zahid, Zulfiqar Ahmad Khan, Muhammad Usman Bhutta, Muhammad Waqas, Adil Saeed

Publikováno v: Materials, Vol 14, Iss 6310, p 6310 (2021)
Materials

It has been established in literature that the addition of nanoparticles to lubricants at an optimum concentration results in a lower coefficient of friction compared to lubricants with no nanoparticle additives. This review paper shows a comparison

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd2aad25f08c60f89bfa77edb83ef4b7
https://www.mdpi.com/1996-1944/14/21/6310

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Friction and wear performance analysis of hydrofluoroether-7000 refrigerant

Autor: Zulfiqar Ahmad Khan, Muhammad Usman Bhutta

Publikováno v: Tribology International. 139:36-54

The disquiet about global warming has triggered the formulation and introduction of new generation of refrigerants. Hydrofluoroethers (HFEs) are within the family of newly developed environmentally friendly refrigerants with a wide range of applicati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7b1a3718b245c334c318b4965417490
https://doi.org/10.1016/j.triboint.2019.06.028

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Friction and Wear Performance Evaluation of Bio-Lubricants and DLC Coatings on Cam/Tappet Interface of Internal Combustion Engines

Autor: Khalid Akhtar, Muhammad Usman Abdullah, Riaz Ahmad Mufti, Haji Hassan Masjuki, Muhammad Usman Bhutta, Rehan Zahid, Mahendra Varman, Jawad Aslam, Mian Ashfaq Ali, M.A. Kalam

Publikováno v: Materials
Zahid, R, Bhutta, M U, Mufti, R A, Abdullah, M, Masjuki, H H, Varman, M, MD., ABUL KALAM, Ali, M A, Aslam, J & Akhtar, K 2021, ' Friction and Wear Performance Evaluation of Bio-Lubricants and DLC Coatings on Cam/Tappet Interface of Internal Combustion Engines ', Materials, vol. 14, no. 23, 7206 . https://doi.org/10.3390/ma14237206
Materials; Volume 14; Issue 23; Pages: 7206
Materials, Vol 14, Iss 7206, p 7206 (2021)

The environmental concerns associated with artificially formulated engine oils have forced a shift towards bio-based lubricants. The deposition of hard coatings on engine components and migrating to environmentally friendly green lubricants can help

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::017fc6fc952eccdc7746727c0bdb42b2
https://pubmed.ncbi.nlm.nih.gov/34885361

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Interest Rate Exposure and Stocks Returns during Global Financial Crisis: Evidence from Islamic and Conventional Markets

Autor: Majid Imdad Khan, Waheed Akhter, Usman Bhutta

Publikováno v: Journal of Islamic Business and Management (JIBM). 10

This study aims to assess the impact of interest rate change on stocks returns and volatility of Islamic and Conventional stock market indices during global financial crisis for the period from 04 January, 2005 to 30 December, 2015.The stock indices

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1dfa3dae03bc912d892c4a7fa6a5d8ea
https://doi.org/10.26501/jibm/2020.1001-009

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Tribological characteristics comparison of formulated palm trimethylolpropane ester and polyalphaolefin for cam/tappet interface of direct acting valve train system

Autor: Abdullah Alabdulkarem, Usman Abdullah, Riaz Ahmad Mufti, Md. Abul Kalam, Mubashir Gulzar, Mahendra Varman, Masjuki Hassan, Nurin Wahidah Mohd Zulkifli, Mian Ashfaq Ali, Robiah H. Yunus, Muhammad Usman Bhutta, Rehan Zahid

Publikováno v: Industrial Lubrication and Tribology. 70:888-901

Purpose There is a continuous drive in automotive sector to shift from conventional lubricants to environmental friendly ones without adversely affecting critical tribological performance parameters. Because of their favorable tribological properties

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b0f5aaa4c7753f98ccfd6efc7d5ca5cf
https://doi.org/10.1108/ilt-06-2017-0156

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Benefits of wonder process craft on engine valve train performance

Autor: Waseem Arshad, M Usman Abdullah, Kiyo Ogawa, Riaz Ahmad Mufti, M Huzaifa Najeeb, M Usman Bhutta, Samiur Rahman Shah, Muhammad Khurram

Publikováno v: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 233:1125-1135

The performance and durability of tribological components in roller follower valve train is governed mainly by the roller rotational behaviour. Pure rolling of roller on the camshaft surface is essential to achieve the optimum valve train efficiency.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::99f363f69e4d29172c807f373dea8328
https://doi.org/10.1177/0954407018760935

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A Historical Review on the Tribological Performance of Refrigerants used in Compressors

Autor: Abdul Ghafoor, Zulfiqar Ahmad Khan, Nigel P. Garland, Muhammad Usman Bhutta

Publikováno v: Tribology in Industry, Vol 40, Iss 1, Pp 19-51 (2018)

Refrigerants directly affect the tribological performance of interacting components in a compressor. Since the introduction of artificially formulated refrigerants, the types of refrigerants used in compressors have changed over the years. Apart from

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61a78224e0a5ef9693503d46eead47c1
http://www.tribology.rs/journals/2018/2018-1/2018-1-03.html

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