Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 83 for “"bicycles"”.
-
Synthesis and Characterization of Polyamine Bicycles for Anion Binding
Abstract This thesis details the interaction between anions, such as Br-, Cl-, and F- and a group of familiar Schiff base derived azacryptands. Often these systems are synthesized by tosylating i.e., protecting, the bridging amine sites to prevent them from undesirable interactions. Only after …
-
Regenerative braking on bicycles to power LED safety flashers
… kinetic energy ordinarily lost during braking on bicycles to power LED safety flashers. The system is designed to eliminate: (a) battery changing in popular LED flashers, and (b) the "generator drag" associated with battery-less human-powered bicycle lights and flashers. System sizing, mechanical …
-
The Steerability of Generative Models: Towards Bicycles for the Mind
… models not only as tools for automation, but as bicycles for the mind.
-
Kinematics, Dynamics and Control of Single-Axle, Two-Wheel Vehicles (Biplanar Bicycles)
A two-wheeled, single-axle, differentially driven vehicle possesses many salient advantages when compared to traditional vehicle designs. In particular, high traction factor, zero turn radius, and inherent static and dynamic stability are characteristics of this configuration. Drive torque is …
-
HOW TRANSIT AGENCIES HANDLE BICYCLES | AN ANALYSIS OF NINE NORTH AMERICAN TRANSIT AGENCIES
… is the lack of accessibility to transit stops. Bicycles can increase user accessibility to transit stops and reduce door-to-door travel times. The goal of this thesis is to better understand how transit agencies currently integrate their transit service with bicycles. While there is a great deal …
-
Riding Bicycles When We Need Cars: The Development Of Transnational Union Networks In Brazil
This dissertation analyzes the development and effects of transnational union networks in Brazil. Transnational union networks are formal organizational linkages created by unions sharing a common multinational employer. Networks expand core union activities across borders allowing unions from …
-
The recyclists : bikes, borders and basura
… caravan to Mexico. The group works to promote bicycles, both here and in Mexico, as an environmentally and financially sound alternative to motorized transportation. Each winter, members ride bicycles they build out of salvaged parts to border cities in Mexico. They give these bicycles to …
-
The role of bicycles and bicycle empowerment centres in improving the mobility and livelihoods of the poor, and assisting with low-carbon development in Cape Town Michael Joseph Boulle
Includes abstract. Includes bibliographical references.
-
Utvärdering av cykelfälts effekter på cyklisters säkerhet och cykelns konkurrenskraft mot bil
… effects on cyclist safety and the ability of bicycles to compete with car traffic. Thirteen Swedish urban streets were studied before and after bicycle lanes were introduced. Data was collected using video recordings, speed studies, road side questionnaires/interviews with cyclists/car …
-
Bicycle detection through the use of inductance loop detectors at vehicular actuated traffic signals
… precluded because of the small mass and size of bicycles. The most popular type of in-road sensing device in use today is the inductance loop detector. As the bicycle continues to increase in importance as a transport mode for a growing number of people, the detection of bicycles through the use …
-
A Multi-Stage Optimization Framework for Battery Swapping in Urban E-Bike Sharing Systems
Shared electric bicycles (e-bikes) are increasingly central to urban transportation, providing a faster, more accessible alternative to conventional bicycles for short trips. As their use grows, maintaining sufficient battery levels across large fleets becomes critical. Among battery management …
-
Towards a Comprehensive Bicycle Motion Behavior Model and Naturalistic Cycling Dataset
… valid for modeling the longitudinal motion of bicycles except for the activation conditions of the collision avoidance strategy which are modified in order to allow for overtaking when possible. The proposed methodology is innovative in that it makes use of the intersection of certain …
-
Data-Driven Bicycle Design using Performance-Aware Deep Generative Models
… develops a foundation for data-driven design of bicycles, introducing three datasets: BIKED, BIKER, and FRAMED, considering holistic bicycle design, aerodynamic optimization, and structural optimization of bicycles respectively. It further proposes a set of tractable bicycle design tools, such as …
-
Mixed traffic in Chinese cities : bicycle and the intersection problems
The mixed traffic (the traffic made up of bicycles and automobiles) is widely spread in Chinese cities. It is also greatly responsible for major traffic problems, such as the conflicts, low efficiency and safety problems. These problems are most evident at street intersections. However, they have …
-
A wait-list controlled evaluation of the Qhubeka bicycle on an adolescent's physiology, executive function, and school performance
… recruited, with the evaluation school receiving bicycles and the control a school who were yet to receive bicycles. Significant differences were observed across the physiological and executive function assessments. Most notably in the executive function tests, the evaluation group showed …
-
Bicycle and Pedestrian Traffic Monitoring and AADT Estimation in a Small Rural College Town
… My thesis explores how to (1) best count bicycles and pedestrians on the entire transportation network, rather than only focus on off-street trail systems or specific transportation corridors and (2) estimate AADT of bicycles and pedestrians in a small college town (i.e., Blacksburg, VA). …
-
Bicycle-powered attachments : designing for developing countries
… transmission through three main modes off of bicycles, via chain drive and friction drive, this thesis proposes recommendations for design in developing countries, including the advantages of chain-driven attachments and considerations necessary for successful implementation.
-
Open loop aspects of two-wheeled vehicle stability characteristics
Bicycles and motorcycles constitute one of the most popular means of transportation in the world. While the literature regarding two wheeled vehicle behavior is extensive, to this day, no consensus exits in the literature as to what principles govern the steering and stability characteristics of …
-
Design of a bicycle rig
… be used for aerodynamics measurement testing of bicycles, cyclists and cycling related items in a wind tunnel. This paper discusses the design of a new version of the bike rig that has been used in the MIT Wright Brothers Wind Tunnel. Through finite element analyses, feasibility and practicality …
-
Donkeys and Compost: Intermediate Transport and Soil Fertility Management in Northern Ghanaian Livelihoods
… larger and could be used almost all day, and bicycles, owned by most farmers. Vehicle access was easiest when richer individuals owned large vehicles and hired or lent them to peers, combining capitalist and traditional systems. A second strategy was useful when no one in the community had …
Page 1 of 5