oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2019 ( 3 )

2018 ( 29 )

2017 ( 29 )

2016 ( 56 )

自定义范围…

匹配条件: “Electric Bicycle” ,找到相关结果约2128条。
列表显示的所有文章,均可免费获取
第1页/共2128条
每页显示
Campus Mobility for the Future: The Electric Bicycle  [PDF]
I. V. McLoughlin, I. K. Narendra, L. H. Koh, Q. H. Nguyen, B. Seshadri, W. Zeng, C. Yao
Journal of Transportation Technologies (JTTs) , 2012, DOI: 10.4236/jtts.2012.21001
Abstract: Sustainable and practical personal mobility solutions for campus environments have traditionally revolved around the use of bicycles, or provision of pedestrian facilities. However many campus environments also experience traffic congestion, parking difficulties and pollution from fossil-fuelled vehicles. It appears that pedal power alone has not been sufficient to supplant the use of petrol and diesel vehicles to date, and therefore it is opportune to investigate both the reasons behind the continual use of environmentally unfriendly transport, and consider potential solutions. This paper presents the results from a year-long study into electric bicycle effectiveness for a large tropical campus, identifying barriers to bicycle use that can be overcome through the availability of public use electric bicycles.
Analyzing Electric Bicycle Rider’s Unsafe Crossing Behavior Based on Theory of Planned Behavior
Qingyuan Zhang,Guoqiang Zhang,Yuli Qi
Modern Transportation , 2013,
Abstract: Electric bicycle riders, particularly youngsters, are one of the high risk groups of road transportation system. Previous studies were limited to the causes of electric bicycle accident, and failed to explore occurrence mechanism of accidents. For a better understanding of electric bicycle rider’s unsafe crossing behavior, a questionnaire which contains TPB variables such as intention, attitude, subjective norm and perceived behavioral control was made based on the theory of planned behavior (TPB). Electric bicycle rider’s unsafe crossing behavior model was established and tested by using AMOS 20.0 which is statistical software and can verify kinds of measurement model and path analysis model through structural equation modeling (SEM). Confirmatory factor analysis (CFA) and goodness-of-fit test indicates that TPB can well explain rider’s unsafe crossing behavior. The results show that attitude toward unsafe crossing and perceived behavioral control have a positive effect on unsafe crossing intention, while otherwise for. Perceived behavioral control and unsafe crossing intention do contribute to the prediction of unsafe crossing behavior. Available advices on the avoidance of unsafe crossing have been suggested on organizing safety education and training, increasing the traffic safety awareness of riders and strengthening law enforcement strategies.
Likelihood Parameterization of Bicycle Crash Injury Severities  [PDF]
Deo Chimba, Daniel Emaasit, Boniphace Kutela
Journal of Transportation Technologies (JTTs) , 2012, DOI: 10.4236/jtts.2012.23023
Abstract: This paper evaluates different factors and parameters contributing to likelihood of bicycle crash injury severity levels. Multinomial Logit (MNL) model was used to analyze impact of different roadway features, traffic characteristics and environmental conditions associated with bicycle crash injury severities. The multinomial model was used due to its flexibility in quantifying the effect of the independent variables for each injury severity categories. Model results showed that, severity of bicycle crashes increases with increase in vehicles per lane, number of lanes, bicyclist alcohol or drug use, routes with 35-45 mph posted speed limits, riding along curved or sloped road sections, when bicyclists approach or cross a signalized intersection, and at driveways. In addition, routes with a high percentage of trucks, roadway sections with curb and gutter, cloudy or foggy weather and obstructed vision were found to have high probability of severe injury. Segments with wider lanes, wide median and wide shoulders were found to have low likelihood of severe bicycle injury severities. Limited lighting locations was found to be associated with incapacitating injury and fatal crashes, indicating that insufficient visibility can potentially lead to severe crashes. Other findings are also presented in the paper.
Discovering cycling routes of national importance
?tefan Huzjan
Urbani Izziv , 1998,
Abstract: Bicycle traffic is an element of traffic infrastructure and deserves more attention. The article presents cycling as an ecologically and spatially undemanding traffic mode and a possibility for reviving urban and suburban areas. By the example of a local study group, organised by the Slovene ecological movement, possibilities are shown for public participation in spatial planning procedures, the integration of bicycle traffic as an equal element of local and national traffic infrastructure, promoting safe cycling and a healthy lifestyle, as well as promoting ecotourism.
Estudio diagnóstico-terapéutico de las lesiones bucofaciales por accidente ciclístico
Díaz Fernández,José Manuel; Gámez Rodríguez,Maximiliano Freddy; Pérez Rodríguez,ángel; Robert Ramos,Jacinto;
Revista Cubana de Estomatolog?-a , 2005,
Abstract: a descriptive and cross-sectional study on the diagnostic and therapeutic aspects of the maxillofacial trauma due to bicycle accident was undertaken in 194 patients with buccofacial injuries that received attention at the emergency maxillofacial surgery service of "saturnino lora" clinical and surgical hospital in santiago de cuba from october 1, 1998 to december 31, 1999. it was observed that fall was the accident that caused the highest number of injured persons, mainly non-severe, whereas collision produced the greatest percentage of severe injuries and deaths. the injuries of the soft tissue prevailed in this type of accident, above all in the contusions and lacerations, generally caused by the fall, which was the mechanism that originated the largest number and diversity of the osteal injuries, with predominance of the zygomatic, palatoalveolar and mandibular fractures. the collision stood out in the production of combined nasal, nasoethmoidal and le fort fractures. the most affected region was the cranium. it also showed the highest diversity and severity of the injuries associated with facial traumatisms. it was observed a predominance of the non-severe maxillofacial injuries, which were compatible with the non-surgical procedures and received ambulatory care.
Aspectos determinantes do posicionamento corporal no ciclismo: uma revis?o sistemática
Kleinpaul, Julio Francisco;Mann, Luana;Diefenthaeler, Fernando;Moro, Ant?nio Renato Pereira;Carpes, Felipe Pivetta;
Motriz: Revista de Educa??o Física , 2010, DOI: 10.5016/1980-6574.2010v16n4p1013
Abstract: by means of systematic review a surveying of english and portuguese language studies concerning the expected body positioning for improvement of cycling. search engines used were lilacs, sciencedirect, scielo and medline. the keywords used to find relevant papers were: posicionamento corporal + ciclismo; ajuste + bicicleta; postura + ciclismo; body positioning + cycling; bicycle fitting; cycling posture. original papers, short review papers, master thesis and books published from 1993 to 2009 (october) were considered when the main subject of discussion was the topic of interest. a total of 20 studies were considered. in general, the studies suggest that is will be useful to know about the bicycle fitting. even so protocols for body positioning evaluation are available, most of studies concluded that cyclists are not able to use this protocol correctly. it suggests the difficult to access studies.
KONYA’DA B S KLET ULA IMI: PLANLAMA VE UYGULAMA SüRE LER N N KAR ILA TIRILMASI
Kaya MERT,Ebru Vesile ?CALIR
Middle East Technical University Journal of the Faculty of Architecture , 2010,
Abstract:
Bicycle Related Injuries in Adults and Children in the Central Anatolian Region: Analysis of 4 Years
Seda ?zkan,Okhan Akdur,?brahim ?kizceli,Polat Durukan
Journal of Academic Emergency Medicine , 2012,
Abstract: Objective: We aimed to investigate and compare the features of child and adult injuries due to bicycle accidents admitted to our emergency department. Material and Methods: The study was carried out retrospectively by searching the files of patients admitted to the emergency department due to bicycle accidents in the emergency department and archive records between the dates of January 2005-December 2008. The patients were divided into two groups as adults and children. Age and sex of the patients, season or month of injuries, place and mechanism of injury, site of the injury, diagnosis and treatment modalities, discharge and hospitalization rates were evaluated. Student t test was used for two group comparison. Results: A total of 150 patients were included in the study. 79% of the patients were in the child age group, 21% were adults. It was determined that the number of accidents increased especially in the summer months. 71.4% of accidents concerning children and all adult accidents occurred in the streets. Falling off the bicycle was the most common cause of injury in children (91%) and adults (90%). The head and neck region was the most common body site subjected to injury in both children (32%) and adults (40%). There was a significant difference between the two groups with respect to injury severity.Conclusion: Most of the injuries due to bicycle accidents in children happen, in the streets, in summer months and during school vacations. Although not statistically significant, it was seen that adult injuries were more serious.
Using of spectral analysis of heart rate variability for increasing reliability of bicycle ergometry results  [PDF]
Vladimir Ivanovich Gridnev, Anton Robertovich Kiselev, Olga Mikhailovna Posnenkova, Vladimir Alexandrovich Shvartz
Health (Health) , 2011, DOI: 10.4236/health.2011.38078
Abstract: The aim was to study the suitability of the heart rate variability (HRV) spectral parameters for evaluations of bicycle ergometry results in coronary heart disease (CHD) patients. Methods. Our study included 243 male CHD patients aged 49±8 years. The coronary atherosclerosis was assessed by coronary angiography. The results of bicycle ergometry, Doppler echocardio-graphy and HRV spectral analysis were also analyzed. The duration of each stage of bicycle ergometry was 3 min, the initial load value was 25 W. Dynamic load continued until the patient had reached 75% of heart rate from his maximal age level. The maximal level of load achieved (i.e. load tolerance) was taken into consideration. We calculated sensitivity (Se), specificity (Sp), likelihood ratios of positive (LR+) and negative (LR-) bicycle ergometry results. Results. All patients had similar clinical characteristics. LR+ become maximal under the moderate load tolerance. LR- are maximal in the CHD patients with high load tolerance. Thus, the excessiveness of false-negative results of bicycle ergometry is in CHD patients with high load tolerance. Reliability of results of bicycle ergometry increased under using assessments of low-frequency (LF) range power of HRV spectrum. Conclusions. Thus,the using of LF range power of HRV spectrum increases reliability of bicycle ergometry (or other load tests) results in CHD patients.
BICICLETA, CIRCULACIóN VIAL Y ESPACIO PúBLICO EN LA ITALIA FASCISTA
Caracciolo,Carlos Héctor;
Historia Crítica , 2009,
Abstract: while the bicycle has not changed much since the end of the nineteenth century, the world around it -fashion, customs, technology, ideology, material culture, political and economic systems- has changed. the bicycle was a part of many aspects of italian life (work, sports, politics, leisure) for various decades and its social meaning changed over the years. this article analyzes the bicycle during the fascist dictatorship: the transformation of its social meaning and its relationship with public space. it highlights the values, strategies of power, hierarchies, tensions, and contradictions of the society and the regime, proposing a way to read them that is useful for understanding other contexts and eras.
第1页/共2128条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.