Potential Effects on Human Safety and Health from Infrasound and Audible Frequencies Generated by Vibrations of Diesel Engines Using Biofuel Blends at the Workplaces of Sustainable Engineering Systems
نویسندگان
چکیده
Employees involved in various occupational environments that include vibration machines and any kind of vehicles are adversely subjected to multiple source noise. Thus, the corresponding noise frequencies (and mainly infrasound ones) present high interest, especially from viewpoint sustainability, due potential effects on human safety health (H_S&H) sustainable engineering projects. Moreover, (OSH) visualization (a fact unveiling social dimension sustainability) workplaces (by evaluating audible generated by diesel engines) could help a officer lessen crucial risk factors OSH field also protect, more efficiently, employees taking most essential measures. This study (i) suggests technique determine sound produced vibrations engines, using biofuels (i.e., utilization resources), order evaluate at projects, (ii) it ultimately aims contribute improvement three “sustainability pillars” (economy, social, environmental). Therefore, provides experimental results frequency (regarding spectrum) motor generates vibration, frame different engine rpms (850, 1150, 2000) variety biofuel mixtures (B20-D80, B40-D60, B60-D40, B80-D20). The article shows fuel blend meaningfully affects noise, particularly, usage blends coming mixing oil with biodiesel emerging environmental can produce frequencies, which determined spectra (~10–23 Hz). suggested technique, ameliorating situation, doubtless will enterprises achieve finest allocation limited financial resources economic sustainability), allowing managers have available budget for implementing other risk-reduction
منابع مشابه
leadership styles of tefl instructors at gilan university and their effects on the students attitudes and motivation
the subjects of the study are only the tefl teachers and students at gilan university. to obtain the desired data, a questionnaire which was based on the theories and disecussions gathered, was used as the main data gathering instrument. to determine the degree of relationship between variables, covariance and pearson product moment correlation coefficient were the formulas applied. the data we...
15 صفحه اولthe effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...
15 صفحه اولon the relationship between using discourse markers and the quality of expository and argumentative academic writing of iranian english majors
the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...
15 صفحه اولthe effects of time planning and task complexity on accuracy of narrative task performance
هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...
the effects of previewing and providing background knowledge on iranian university efl learners’ comprehension of literary and academic texts
abstract poor reading comprehension can result in failure in using references, benefiting from professional gatherings and resources, keeping up with the growing body of knowledge in the virtual world of the internet, and failing to achieve in efl programs. the purpose of the present quasi-experimental study was to explore the effects of background knowledge and previewing narrative and expos...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Sustainability
سال: 2022
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su14137554