Use of Psychoacoustic Metrics for the Analysis of Next Generation Computer Graphic Card Noise

2005 ◽  
Author(s):  
Colin Novak ◽  
Helen Ule ◽  
Robert Gaspar ◽  
Gamal Refai-Ahmed
Keyword(s):  
Computer Graphic ◽  
Sound Quality ◽  
Quality Metrics ◽  
Passive Cooling ◽  
Air Cooling ◽  
Analysis Tool ◽  
Processing Unit ◽  
Fan Noise ◽  
Analysis Techniques ◽  
Psychoacoustic Metrics

The continuing challenge to deliver performance improvements in computer graphic cards has long since progressed to the point of requiring finned, passive, cooling devices to dissipate the heat generated by the graphics processing unit (GPU). The heat flux generated by further improvements now exceeds that dissipation capacity so that passive cooling can no longer provide adequate cooling the GPU. The dissipation rates required by the latest generation of designs can be delivered by forced air cooling of finned heat sinks. The concurrent challenge to the industry is to provide this cooling while minimizing the noise generated by these cooling fans. A significant aspect associate with this problem is missed if one only considers the problem to be a one-dimensional sound level issue. From a consumer’s perspective, the perceived quality of the noise emitted takes precedence over what traditional acoustical analysis techniques of this fan noise may imply. Here, psychoacoustic or sound quality metrics, may be a more applicable analysis tool as it provides the quantification of these qualitative human impressions. The present study investigates the validity of using several psychoacoustic metrics for the analysis of fan cooled computer graphics card noise. Using experimentally measured fan noise from three different cooling fan designs, a sound quality analysis was performed using loudness, sharpness, roughness, fluctuation strength, prominent tone and articulation index. A discussion and comparison of measured results using traditional analysis techniques is also included. It was found that some of the metrics proved more useful than others as an analysis tool for this specific noise source. A discussion of the applicability of the various sound quality metrics along with justifications is presented.

scholarly journals Pengaruh Gaya Kepemimpinan Kepemimpinan dan Penempatan Pegawai Terhadap Motivasi Kerja Serta Dampaknya Pada Kinerja Pegawai di Biro Umum Setda Provinsi Jambi

2020 ◽  
Vol 5 (2) ◽  
pp. 276
Author(s):  
M Zahari MS ◽  
Fakhrul Rozi Yamali ◽  
A Irfani
Keyword(s):  
Leadership Style ◽  
Work Motivation ◽  
Employee Performance ◽  
Good Condition ◽  
Employee Motivation ◽  
Analysis Tool ◽  
Analysis Techniques ◽  
Indirect Influence ◽  
Several Variables ◽  
And Performance

Theoretically outlined, Employee Performance can be influenced by several variables including Leadership Style, Placement, and Work Motivation. Therefore, the performance of employees at the General Bureau of Setda Jambi Province can also be attributed to these three variables, this is what inspired the authors to conduct the research. Research objectives: 1. To find out the description of leadership style, placement,, motivation, and performance of Employees in the General Bureau of Setda Jambi Province, 2. To know the direct and indirect influence of leadership style and placement on the work motivation of employees in the General Bureau of Setda Jambi Province, 3. To know the direct and indirect influence of leadership style and placement on the performance of Employees in the General Bureau of Setda Jambi Province, 4. To know the influence of leadership style and placement through work motivation on Kinerja Employees in The General Bureau of Setda Jambi Province. This research that became the object of the research was employees of the General Bureau of Setda Jambi Province with a population of 130 people who were used as a research sample. Analysis techniques using Path Analysis tool using SPSS 22 software. The results showed that: 1. Leadership style, placement, motivation and employee performance are in good condition, 2. Leadership and placement styles directly and indirectly affect employee motivation, 3. Leadership and placement styles directly and indirectly affect employee performance, 4. Leadership and placement styles through motivation directly and indirectly affect performance.

Advanced Analysis Techniques for NVH and Sound Quality Improvement

2016 ◽  
Author(s):  
Thomas Deighan ◽  
Graeme Maclean ◽  
Nozomu Kato ◽  
Kiyofumi Sato
Keyword(s):  
Quality Improvement ◽  
Sound Quality ◽  
Analysis Techniques ◽  
Advanced Analysis

A Bayesian Based Machine Learning Application to Task Analysis

2012 ◽  
pp. 234-242
Author(s):  
Shu-Chiang Lin
Keyword(s):  
Machine Learning ◽  
Task Analysis ◽  
Analysis Tool ◽  
Analysis Techniques ◽  
Bayesian Methodology ◽  
The Past ◽  
Expensive Process

Many task analysis techniques and methods have been developed over the past decades, but identifying and decomposing a user’s task into small task components remains a difficult, impractically time-consuming, and expensive process that involves extensive manual effort (Sheridan, 1997; Liu, 1997; Gramopadhye and Thaker, 1999; Annett and Stanton, 2000; Bridger, 2003; Stammers and Shephard, 2005; Hollnagel, 2006; Luczak et al., 2006; Morgeson et al., 2006). A practical need exists for developing automated task analysis techniques to help practitioners perform task analysis efficiently and effectively (Lin, 2007). This chapter summarizes a Bayesian methodology for task analysis tool to help identify and predict the agents’ subtasks from the call center’s naturalistic decision making’s environment.

Beyond green façades: active air-cooling vertical gardens

2019 ◽  
Vol 8 (3) ◽  
pp. 243-252 ◽  
Author(s):  
Michael Maks Davis ◽  
Andrea Lorena Vallejo Espinosa ◽  
Francisco Rene Ramirez
Keyword(s):  
Design Methodology ◽  
Cooling Capacity ◽  
Urban Environments ◽  
Passive Cooling ◽  
Air Cooling ◽  
Climate Control ◽  
Content Type ◽  
Air Inlet ◽  
Water Saturated ◽  
Monteith Equation

Purpose Vertical gardens offer multiple benefits in urban environments, including passive cooling services. Previous research explored the use of “active vertical gardens” as potential evaporative air-cooling units by developing a mathematical model based on the FAO-56 Penman Monteith equation. Further research showed that active vertical gardens function best by creating an airflow in the cavity behind the garden such that air is cooled by flowing over the water-saturated garden substrate. The purpose of this paper is to improve the quantification of active vertical garden performance. Design/methodology/approach A building-incorporated vertical garden was built in Quito, Ecuador, with an air inlet at the top of the garden, an air cavity behind the garden and where air was expelled from the base. Measurements were made of air temperature, humidity and velocity at the air inlet and outlet. Findings The active vertical garden cooled the air by an average of 8.1 °C with an average cooling capacity of 682.8 W. Including the effects of pre-cooling at the garden inlet, the garden cooled the air by an average of 14.3 °C with an average cooling capacity of 1,203.2 W. Originality/value The results are promising and support the potential for active vertical gardens to be incorporated into building services and climate control.

Mooring with Multicomponent Cable Systems

1980 ◽  
Vol 102 (2) ◽  
pp. 62-69 ◽  
Author(s):  
K. A. Ansari
Keyword(s):  
Dynamic Response ◽  
System Design ◽  
Mooring Line ◽  
Analysis Tool ◽  
Mooring System ◽  
Practical Application ◽  
Analysis Techniques ◽  
Anchoring System ◽  
Cable Systems ◽  
Stiffness Characteristics

Relative to the present-day need for offshore operations involving the use of moored vessels, mooring system design has become quite complex. Since a proper choice of mooring line components in the form of anchors, clump weights, chains and cables is vital for vessel station-keeping and mooring system survival, the adequacy of the mooring system under consideration must be checked out by suitable analysis techniques. This paper gives a general discussion of the various mooring line components available for use, presents an analysis tool to determine the stiffness characteristics of a multicomponent cable including the effect of line stretch, and demonstrates how these could be included in the dynamic analysis of an offshore construction vessel moored by a multileg anchoring system. The maximum limiting tension of the mooring line considered, which is a combination of anchors, clump weights, chains and cables is determined from the several breaking strengths and anchor capacities associated with the various cable configurations that can occur. Finally, in order to illustrate a practical application, the dynamic response of a moored production barge subjected to external environmental forces is examined.

Study on sound quality evaluation of fan noise

2005 ◽  
Vol 118 (3) ◽  
pp. 1868-1868
Author(s):  
Gaku Minorikawa ◽  
Shoji Suzuki ◽  
Akio Nagamatsu ◽  
Hiroshi Irikado ◽  
Takahiro Ito
Keyword(s):  
Quality Evaluation ◽  
Sound Quality ◽  
Fan Noise
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