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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The Investigation of Ping-Tung Motorcycle Driving Cycle and Emission Factor

Lin, Zhi-Feng 20 July 2001 (has links)
During administer mobil source examine and control plan , we must estimate emission amount , curtail amount and curtail rate , to estimate the improve effection . But there has very few data of this aspect , especially real road driving pattern to calcul ate emission factory and amount . So it¡¦s necessary to proceed this aspect investigate. The investigate have two parts include driving pattern and emission factor . Determine item is CO , THC and NOx .The result of driving Ping-tung area have faster speed,longer navigate time and larger acceleration and deceleration . The result of emission factor¡GCO is 6.79 (¡Ó3.39) g/km , THC is 1.63 (¡Ó1.27) g/km and NOx is 0.13(¡Ó0.14) g/km . Idle emission CO is 1.03%(¡Ó1.19%)¡ATHC is 1400(¡Ó2138) ppm
2

Decomposition of FSMD for Low Power

Wu, Ming-Ho 09 September 2008 (has links)
none
3

An analysis of school bus idling and emissions

Rome, Christopher 31 August 2011 (has links)
In 2009, Cobb County School District (CCSD) and Georgia Institute of Technology (Georgia Tech) received a competitive federal grant to implement an idle and tailpipe emission reduction program in the CCSD bus fleet. The project is designed to reduce school bus idling by installing GPS and idle detection systems in the bus, providing bus dispatchers with a web system to track vehicle activity and idling in real-time, and to automatically shut off the engine when idle thresholds at specific locations are exceeded. A team of Georgia Tech researchers is implementing the anti-idle program and estimating the emissions and fuel savings from the project using approved modeling methods. This thesis presents the results of the emission modeling process, as well as an analysis of baseline school bus idling activity. EPA's MOVES mobile source emission model was used to develop emission rates for school buses for each operating mode, which are defined by the instantaneous vehicle speed, acceleration and scaled tractive power. Local data for Cobb County and Atlanta were collected and input into the MOVES model. The pollutants modeled include carbon dioxide, carbon monoxide, particulate matter (coarse and fine), oxides of nitrogen, and gaseous hydrocarbons. The vehicle activity data collected through the GPS and communications equipment installed in the buses were classified into the operating mode bins for each second of recorded data, and multiplied by the corresponding emission rate to determine the total modal emissions before and after project implementation. Preliminary results suggest that thousands of gallons of diesel fuel and thousands of dollars can be saved with the project, improving overall fleet fuel efficiency by 2%, as well as reducing emissions in some categories by as much as 38%.
4

The maclaurin series for the moments of performance measures in a GI/G/1 queue

曾凱弘 Unknown Date (has links)
無 / We derive the MacLaurin series for the moments of the idle time with respect to the parameters in the service time and interarrival time distributions for a GI/G/I queue. The light traffic derivatives are obtained to investigate the quality of a well-known MacLaurin series. The coefficients in these series are expressed in terms of the derivatives of the interarrival time density function evaluated at zero and the moments of the service time distribution, which can be easily calculated through a simple recursive procedure. The result for the idle period is easily taken as input to the calculation of other performance measures of the system, e.g., interdeparture time distributions. Numerical examples are given to illustrate these results.
5

A Traffic-Load Oriented Power Saving Mechanism in Ad Hoc Networks

Tan, Jui-hua 13 February 2007 (has links)
The mobile ad hoc network (MANET) has become a popular technology in recent years. Due to most devices are battery powered, energy conservation is a critical issue in the MANET. To save energy and extend battery life, nodes should turn their radios off when they have no packet to send or receive. To achieve this, IEEE 802.11 defined a synchronous power saving mechanism (PSM) based on periodical beacon transmission. It allows devices to turn their radios off when no data has to be sent or received. However, the idle state is long because the device must remain awake during the entire beacon interval even though there is only a small amount of data packets to be sent. Although some PSMs have been proposed, they still suffer from a long idle state. In this paper, we propose a new power saving mechanism by dynamically adjusting the sleeping time based on the network traffic. Simulation results show that the proposed PSM outperforms other PSMs in energy goodput and lifetime.
6

Study of Oil Degradation in Extended Idle Operation Heavy Duty Vehicles

Kader, Michael Kirk 02 October 2013 (has links)
Advances in engine oil technology and increased combustion efficiency has resulted in the longer oil intervals in vehicles. Current oil change interval practice only takes into account the mileage a vehicle has driven and does not consider other vehicle operations that affect oil life like extended idle. Routine oil sampling is one way to ensure optimal oil intervals, but the price continuous analysis can be prohibitive. It is possible to use on board diagnostic (OBD) data to correlate oil degradation to engine usage in order to develop an algorithm that is applicable to many vehicles. While much research has been conducted for light duty vehicles, little has been completed for heavy duty vehicles, in particular vehicles that idle a majority of their time. This study uses multiple heavy duty vehicles that are monitored by monthly routine oil analysis and logging of on board diagnostic data to determine the effects extended idle has on the wear rate of oil. The vehicles were used in their normal operation; this resulted in an average idle run time of 60% of run time and no less than 50% in a single vehicle. At each sample the quality of the oil and the operation of the engines were assessed. The results of the oil analysis showed very little degradation of oil. As expected, a negative correlation was seen in viscosity and total base number (TBN) but not abnormal when compared to base oil. Significant degradation was not seen even after using the vehicle passed the manufacturer recommended oil intervals. Analysis of engine operation showed that the temperature of the oil was optimal for 85% of idle operation. In addition, oil pressures at idle were sufficiently higher than the minimum pressure recommended by the manufacturer, but was less than half of the average in use oil pressure. The combination of low pressure and optimal temperature has resulted in little oil degradation. The results from the study have shown that extended idling in the study vehicles can be treated similar to long trip interval service for oil degradation. Additionally, extended idling did not result in abnormal engine wear or excessive contamination.
7

Tension and Trauma in Idle Talk under the Bean Arbor

Waldrop, Lindsey 06 September 2017 (has links)
As a genre, the huaben話本 short story reassured readers of a Heaven who punished and rewarded human actions with perfect accuracy. Yet in the years before the Ming明 (1368-1644) collapse, the genre grew increasingly dark. Aina Jushi wrote Doupeng xianhua豆棚閒話, or Idle Talk under the Bean Arbor (c. 1668), only a few years after the Manchus solidified their rule. The only full-frame story in pre-modern Chinese literature, the text is also notable for the directness with which it confronts societal and cosmological questions arising from the fall of the Ming dynasty. It was also the last significant huaben before the genre faded into obsolescence. My dissertation asks three questions. Why was this the last major collection of the genre? How do the form and the content work together? And what does Aina contribute to the Qing cosmological questioning through a genre obsessed with an ordered cosmos? I argue that the text deserves further study because of the beautiful complexity of its narrative structure and voices and its direct confrontation of the fall of the Ming. I also argue that Aina questions if there really is a moral Heaven that rewards and punishes human action and if there is any greater significance to virtuous action. His doubts about the presence of a moral Heaven increase as the text progresses but he is unwilling to completely discard Confucian relational ethics. This is shown by his loosening of the requirements of the huaben structure. The narratives become more incoherent and the content generally grows darker. By the final narrative, Aina drops the huaben form and presents an apathetic cosmos directly to the primary diegetic audience. The resulting cognitive dissonance causes the bean arbor to collapse and the audience to disperse. Aina offers us no moral certitude or clear didacticism.
8

Det beroendeframkallande klicket : Engagerande och emotionella icke-spel / The Addictive Click : Engaging and Emotional Idle Games

Helmisaari, Marc January 2015 (has links)
En ny spelgenre har ökat i popularitet de senaste fem åren. En spelgenre som faller utanför den klassiska definitionen av spel. En spelgenre vid namn ”Idle Games”. Föreliggande studie handlar om vilka element i dessa spel som får spelaren att fortsätta spela och hur elementen kan analyseras med hjälp av MDA och AARRR ramverken. Data har samlats in från tre populära Idle Games vid namn Cookie Clicker, Clicker Heroes och AdVenture Capatalist. En enkät har också skickats till spelarna av dessa spel för att få en uppfattning om varför spelen är populära. Resultaten har sedan analyserats med olika speldesignteorier för att undersöka vilka spelmekaniker som skapar lusten att spela och varför dessa spel är populära. / A new game genre has seen increased popularity during the last five years. A game genre that falls outside the classic definition of games. A game genre with the name of “Idle Games”. This study is all about which elements in these games create the drive for the player to continue playing and how the elements can be analyzed with the help of MDA and AARRR frameworks. Data have been collected from three popular idle games with the names of Cookie clicker, Clicker Heros and AdVenture Capatalist. A survey has also been sent to the players of these games in order to get better knowledge of why these games are popular. The result has then been analyzed with different design theories in order to examine which game mechanics create the feel to play and why.
9

Idle Time and Employee Outcomes

Zeschke, Martin 23 January 2024 (has links)
Idle time is a common phenomenon that prevents employees from performing their core job tasks, with detrimental effects on employee well-being and performance. Drawing on affective events theory, the job demands-resources model, and action regulation theory, this dissertation addresses three main questions: First, how idle time affects employee well-being and performance; second, the mechanisms behind these effects, namely appraisals and affective reactions; and third, the conditions under which idle time may be beneficial for employees. Study 1 (N = 338) showed indirect negative effects of objective idle time on employee well-being through the subjective experience of being idle. Age was negatively and boredom proneness positively associated with subjective idle time. Two experiments in Study 2 (N2a = 445, N2b = 597) demonstrated the detrimental effects of regulation problems on employee well-being and performance, mediated by objective and subjective idle time. Recovery activities buffered the detrimental effects of idle time. In Study 3, a 12-month, five-wave longitudinal study (N = 1,036), the associations of idle time with lower job satisfaction, higher turnover intentions, and higher counterproductive work behavior were mediated by higher boredom. Finally, the results of Study 4, based on the same data as Study 3, showed that the effects of idle time on employee exhaustion and engagement depended on boundary conditions, namely workload and autonomy. For high workload employees, idle time was positively associated with engagement, whereas when autonomy was high, idle time was associated with lower exhaustion and lower engagement. During idle time, relaxation was beneficial, whereas detachment was detrimental regarding employee exhaustion and engagement. Idle time is detrimental to employee well-being and performance, mediated by subjective idle time, boredom, and lack of recovery, respectively. Certain conditions, like high workload or using idle time for relaxation, can make it beneficial for employees. The results provide insights for research, particular in the areas of waiting, interruptions, recovery, and well-being.:Acknowledgments i English Abstract ii German Abstract iii Table of Contents iv List of Tables ix List of Figures x 1 General Introduction 1 2 Study 1: Effects of Idle Time on Well-Being – An Experimental Study 6 2.1 Abstract 6 2.2 Introduction 7 2.3 Idle Time as an Affective Event at Work 9 2.4 Method 11 2.4.1 Open Science 11 2.4.2 Study Design 11 2.4.3 Participants 12 2.4.4 Materials 13 2.4.5 Data Analysis 14 2.5 Results 15 2.5.1 Descriptive Statistics 15 2.5.2 Confirmatory Factor Analysis 15 2.5.3 Manipulation Check 15 2.5.4 Hypothesis Tests 15 2.5.5 Exploratory Results 16 2.6 Discussion 17 2.6.1 Theoretical and Practical Implications 17 2.6.2 Limitations and Future Research 19 2.7 Conclusion 21 2.8 Open Data and Electronic Supplementary Materials (ESM 1) 21 3 Study 2: Idle Time, Recovery, and Work Outcomes: Results of Two Experimental Studies 26 3.1 Abstract 26 3.2 Introduction 27 3.3 Idle Time at Work 29 3.3.1 Antecedents of Idle Time 29 3.3.2 The Consequences of Idle Time 30 3.3.3 The Mechanisms Underlying Effects of Idle Time 31 3.4 Study 1 33 3.4.1 Method 33 3.4.2 Results 36 3.4.3 Discussion 37 3.5 Study 2 37 3.5.1 Method 37 3.5.2 Results 40 3.5.3 Discussion 43 3.6 General Discussion 43 3.6.1 Theoretical and Practical Implications 44 3.6.2 Limitations and Future Research 46 3.7 Conclusion 47 4 Study 3: Is it Bad Because it is Boring? Effects of Idle Time on Employee Outcomes 58 4.1 Abstract 58 4.2 Introduction 59 4.3 The Effects of Idle Time 62 4.3.1 Idle Time and Boredom 63 4.3.2 Boredom and Employee Outcomes 64 4.3.3 Idle Time and Employee Outcomes 65 4.4 Method 66 4.4.1 Participants and Procedure 66 4.4.2 Measures 68 4.4.3 Statistical Analysis 70 4.5 Results 71 4.5.1 Hypothesis Tests 71 4.5.2 Additional Analyses 73 4.6 Discussion 75 4.6.1 Theoretical and Practical Implications 75 4.6.2 Limitations and Future Research 77 4.7 Conclusion 79 5 Study 4: Can Idle Time Serve as a Resource? A Job Demands-Resources Approach 88 5.1 Abstract 88 5.2 Introduction 89 5.3 Theoretical Background and Hypotheses Development 91 5.3.1 The Downsides of Idle Time 91 5.3.2 The Benefits of Idle Time 92 5.4 Method 94 5.4.1 Participants and Procedure 94 5.4.2 Measures 95 5.4.3 Data Analysis 97 5.5 Results 97 5.5.1 Hypothesis Tests 97 5.5.2 Additional Analyses 99 5.6 Discussion 99 5.6.1 Theoretical and Practical Implications 100 5.6.2 Limitations and Future Directions 102 5.7 Conclusion 103 6 General Discussion 109 6.1 Summary 109 6.2 Theoretical Contributions 110 6.2.1 The Consequences of Idle Time 110 6.2.2 The Mechanisms Underlying Idle Time 111 6.2.3 Recovery and Boundary Conditions 112 6.3 Practical Contributions 113 6.4 Limitations and Future Directions 114 6.4.1 Affective Events Theory 114 6.4.2 Event System Theory 115 6.4.3 Action Regulation Theory 116 6.5 Conclusion 117 References 118 Appendix I Theses I Idle Time at Work I Study 1: Effects of Idle Time on Well-Being – An Experimental Study II Study 2: Idle Time, Recovery, and Work Outcomes: Results of Two Experimental Studies II Study 3: Is it Bad Because it is Boring? Effects of Idle Time on Employee Outcomes II Study 4: Can Idle Time Serve as a Resource? A Job Demands-Resources Approach III Conclusion IV References IV Thesen VI Leerlaufzeiten bei der Arbeit VI Studie 1: Auswirkungen von Leerlaufzeiten auf das Wohlbefinden – eine Experiment VII Studie 2: Leerlaufzeit, Erholung und Arbeitsergebnisse: Ergebnisse von zwei experimentellen Studien VII Studie 3: Sind sie schlecht, weil sie langweilig sind? Auswirkungen von Leerlaufzeiten auf Beschäftigte VII Studie 4: Kann Leerlaufzeit als Ressource dienen? Ein Arbeitsanforderungen-Ressourcen-Ansatz VIII Schlussfolgerungen IX Literaturverzeichnis IX Curriculum Vitae XI Publication List XII Selbstständigkeitserklärung XIV Nachweise über die Anteile der Co-Autorschaft: Studie 1 XV Nachweise über die Anteile der Co-Autorschaft: Studie 2 XVI Nachweise über die Anteile der Co-Autorschaft: Studie 3 XVII Nachweise über die Anteile der Co-Autorschaft: Studie 4 XVIII
10

SELF-STABILIZING PHILOSOPHERS WITH GENERIC CONFLICTS

Danturi, Praveen Kumar 05 April 2007 (has links)
No description available.

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