Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Saeid Ahmadi"'
A Technical Review on the Proper Design of Gate Drivers in Industrial Power Electronics Applications
Publikováno v:
International Journal of Industrial Electronics, Control and Optimization, Vol 7, Iss 2, Pp 109-117 (2024)
Power semiconductor devices are the most important components in power electronics applications. They are also the most fragile components of electronic circuits. A power semiconductor device's switching performance and protection depend on the gate
Externí odkaz:
https://doaj.org/article/3fa3fe2009364134b8fdaf25945314a0
Publikováno v:
بهداشت و ایمنی کار, Vol 14, Iss 1, Pp 40-53 (2024)
Introduction: Disturbing noise can cause physical and mental illnesses among workers; for this reason, it is necessary to restrain it, especially in workplaces. Using sound-absorbing materials with suitable acoustic properties has been a growing tren
Externí odkaz:
https://doaj.org/article/4429df8144804dee9336ab29f8f8a3fc
Publikováno v:
Heliyon, Vol 10, Iss 5, Pp e27263- (2024)
Compressors are a significant source of noise in various industries. Silencers can be utilized to mitigate this noise. This study aims to design and construct an expansion silencer that can effectively reduce the pulsating noise produced by a recipro
Externí odkaz:
https://doaj.org/article/2491c182bc244f4e90bdd86f9d8de9c3
Publikováno v:
Heliyon, Vol 9, Iss 9, Pp e20058- (2023)
Periodic sound reduction at some frequencies and high pressure loss could be considered as the disadvantages of simple expansion silencers. Generally, reactive elements are applied in silencers to optimize their acoustic and aerodynamic performance.
Externí odkaz:
https://doaj.org/article/580507f36bbf4316a35e558a4776ca63
Publikováno v:
Journal of Health Sciences and Surveillance System, Vol 10, Iss 4, Pp 471-479 (2022)
Background: Awkward posture during work is one of the most critical risk factors for musculoskeletal disorders. A laptop desk fitting with users’ body dimensions plays a crucial role in maintaining proper posture and reducing musculoskeletal disord
Externí odkaz:
https://doaj.org/article/74f6aa64ac6c460e9ce89d36f2cf6301
Autor:
Ashkan Jafari malekabad, Sajad Zare, Mohammad Reza Ghotbi ravandi, Saeid Ahmadi, Reza Esmaeili, Moslem Mohammadi dameneh
Publikováno v:
Heliyon, Vol 8, Iss 11, Pp e11556- (2022)
Noise is one of the most harmful factors in the work environment, which is very important to control. There are various techniques to achieve this goal. One of the most important of them is the use of noise absorbers. Absorbent materials are often us
Externí odkaz:
https://doaj.org/article/05d5dbc093d24685b45873224b346cfe
Autor:
Saeid Ahmadi Bonabi, Vajiheh Javani
Publikováno v:
Sports Business Journal, Vol 1, Iss 2, Pp 13-31 (2021)
Purpose: One of the actual reasons for sponsorship is to attract millions to increase the number of consumers. Therefore, this article aims to study the effects of kit sponsorship for football clubs on Nike's corporate value by analyzing price trends
Externí odkaz:
https://doaj.org/article/fc79757a43a844048413e72ca92c4752
Publikováno v:
Muhandisī-i bihdāsht-i ḥirfah/ī, Vol 7, Iss 3, Pp 1-8 (2020)
Background and Objective: Perforated panels are one of the most common resonant absorbers for sound control. These types of absorbers are widely used due to their adjustable mechanical properties and ease of processing. This study was conducted to in
Externí odkaz:
https://doaj.org/article/59ce9bb47f9a4b7bb48905cc93e9f111
Publikováno v:
Salāmat-i kār-i Īrān, Vol 16, Iss 4, Pp 46-58 (2019)
Background and aim: Microwave radiations are one of the most environmental workplace factors that exposed too many workers. In microwave spectrum, radar frequency with 1-300 GHz range have varied applications such as satellite, communications, milita
Externí odkaz:
https://doaj.org/article/2807f4dcc35a4e00ade7d1612b79f804
Autor:
Sajad Zare, Mohammad R. Baneshi, Rasoul Hemmatjo, Saeid Ahmadi, Mohsen Omidvar, Behzad F. Dehaghi
Publikováno v:
Safety and Health at Work, Vol 10, Iss 1, Pp 109-113 (2019)
Background: In both developed and developing countries, noise is regarded as the most common occupational hazard in various industries. The present study aimed to examine the effect of sound pressure level (SPL) on serum cortisol concentration in thr
Externí odkaz:
https://doaj.org/article/e6e43dd82f8b4ef987335336db16ede2