726 results on '"travel distance"'
Search Results
202. Attenuation of High-Frequency Seismic Waves
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Sato, Haruo, Fehler, Michael C., Beyer, Robert T., editor, Sato, Haruo, and Fehler, Michael C.
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- 2009
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203. Warehouse Order Picking Process
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Merkuryev, Yuri, Burinskiene, Aurelija, Merkuryeva, Galina, Merkuryev, Yuri, editor, Merkuryeva, Galina, editor, Piera, Miquel Àngel, editor, and Guasch, Antoni, editor
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- 2009
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204. 3-D multi-aspect mix degree index: A method for measuring land use mix at street block level.
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Zhao, Xin, Xia, Nan, and Li, ManChun
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LAND use , *URBAN planning , *SUSTAINABLE urban development , *STREETS , *CURRICULUM - Abstract
Land use mix refers to the integration of different land use types within a certain region, which is essential for sustainable cities. Comprehensive, accurate, and reasonable indices are priorities for evaluating the mixing degree, and current indices are mostly limited to two-dimensional (2-D) space. Based on three-dimensional (3-D) information from building and points of interest (POI) data, we improved the calculation methods of 2-D indicators and constructed a 3-D multi-aspect mix degree index, including single indicators (3-D diversity indicator, 3-D accessibility indicator and 3-D street block compatibility indicator) and a comprehensive indicator (3-D comprehensive mix degree indicator, CMDI 3D). Considering the street block as study unit, results showed that Shenzhen had a high level of land use mix, especially urban centers with better socioeconomic conditions, and CMDI 3D could delineate salient spatial heterogeneity. A comparative analysis revealed that CMDI 3D was less affected by spatial scales, negatively correlated with travel distance (r ≤ −0.145), and strongly intercorrelated with other single indicators (r ≥ 0.40), which proved its stability and capacity to provide additional characteristics. Compared with 2-D Indicators, empirical verification and stronger correlations with travel distance also validated the effectiveness and advantages of 3-D Indicators. The proposed index can significantly help to improve urban planning and management. • Land use mix is important for sustainable cities and urban planning. • 3-D multi-aspect mix degree index from diversity, accessibility & compatibility. • Building and POI data were integrated for index construction at street block level. • Comprehensive indicator CMDI 3D showed obvious spatial heterogeneity in Shenzhen. • 3-D Indicators had stronger correlations with travel distance than 2-D Indicators. [ABSTRACT FROM AUTHOR]
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- 2023
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205. Bayesian Hierarchical Tobit Models: an application to travel distance analysis
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Jonathan Aguero-Valverde
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Travel distance ,Bayesian Tobit hierarchical models ,residential location ,employment location ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The objective of travel distance models is to better understand travel behavior so that policies can be implemented for reducing travel and with that the externalities of transport such as air pollution, congestion, and crashes. Hierarchical Bayesian models offer a flexible framework to analyze travel behavior by allowing the study of short term decisions of the activity and travel choices as well as long term decisions of residential and employment location. Since travel distance is censored at zero for a significant fraction of the observations, parameter estimates obtained by conventional regression methods are biased. Consistent parameter estimates can be obtained by using the Tobit model. The purpose of this paper is to demonstrate the application of fully Bayesian Tobit hierarchical models to the analysis of travel distance; this with the goal of accommodating the multilevel and censored nature of the data. Results show that the hierarchical Tobit Model performs significantly better than the non-hierarchical model as measure by the Deviance and Deviance Information Criteria. Further, the highly significant variance at the individual and location levels, demonstrates the importance of using a multilevel approach. The distance traveled increases with years of study and job qualification. In addition, all the members of the household travel less than the householder and women travel less than men. Industry sectors also show significant differences in travel time: workers in the secondary and tertiary sectors travel farther than workers in the primary sector. Land price is significantly correlated with distance traveled in both residence and employment locations.
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- 2017
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206. Exploring the Nonlinear and Threshold Effects of Travel Distance on the Travel Mode Choice across Different Groups: An Empirical Study of Guiyang, China
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Mingwei He, Jianbo Li, Zhuangbin Shi, Yang Liu, Chunyan Shuai, and Jie Liu
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China ,Travel ,travel distance ,nonlinear effect ,group heterogeneity ,mode choice behavior ,random forest ,Health, Toxicology and Mutagenesis ,Surveys and Questionnaires ,Public Health, Environmental and Occupational Health ,Transportation ,Walking - Abstract
Examining how travel distance is associated with travel mode choice is essential for understanding traveler travel patterns and the potential mechanisms of behavioral changes. Although existing studies have explored the effect of travel distance on travel mode choice, most overlook their non-linear relationship and the heterogeneity between groups. In this study, the correlation between travel distance and travel mode choice is explored by applying the random forest model based on resident travel survey data in Guiyang, China. The results show that travel distance is far more important than other determinants for understanding the mechanism of travel mode choice. Travel distance contributes to 42.28% of explanation power for predicting travel mode choice and even 63.24% for walking. Significant nonlinear associations and threshold effects are found between travel distance and travel mode choice, and such nonlinear associations vary significantly across different socioeconomic groups. Policymakers are recommended to understand the group heterogeneity of travel mode choice behavior and to make targeted interventions for different groups with different travel distances. These results can provide beneficial guidance for optimizing the spatial layout of transportation infrastructure and improving the operational efficiency of low-carbon transportation systems.
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- 2022
207. Understanding portuguese consumers ́ perceptions of local food products
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Teixeira, Joana Isabel Aires and Matos, Florinda Maria Carreira Neto
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Cadeias de abastecimento curtas ,Travel distance ,Emissões de carbono ,Distâncias de transporte ,D12 ,D Microeconomics ,Short food supply chains ,Q01 ,Sustentabilidade ambiental -- Environmental sustainability ,Ciências Sociais::Economia e Gestão [Domínio/Área Científica] ,Q Agricultural and natural resource economics - Environmental and ecological economics ,Carbon emissions - Abstract
The urge to combat the increase in CO2 emissions and climate change requires humankind to rethink activities and learn to live within environmental capacity. In this manner, production and consumption methods must be altered in favor of environmental sustainability. An important part of these harmful emissions comes from food supply chains, especially downstream stages. A more sustainable alternative is short food supply chains. For this reason, the purpose of this dissertation is to understand if Portuguese consumers are aware of the impact that long travel distances of food products have on the environment and if they are willing to pay more for food products that will reduce carbon emissions as they are produced locally. To achieve the aim of this research, the data collection consisted of an observation used as a pre-case study to confirm the lengthiness of transportation distances and the application of an online questionnaire to gather information about consumers. The findings of the present research elucidate that Portuguese consumers are aware of the environmental benefits of purchasing local food products but at the time of purchase these are not the most important factors when making a decision. In fact, these are the least important. Despite this, in general, consumers are willing to pay price premiums for local products. A necessidade de combater o aumento das emissões de CO2 e as alterações climáticas impõem que a humanidade repense nas suas atividades e que aprenda a viver dentro da capacidade ambiental. Desta forma, os métodos de produção e consumo devem ser alterados em prol da sustentabilidade ambiental. Uma grande parte destas emissões nocivas provém das cadeias de abastecimento alimentar, especialmente das fases a jusante. Uma alternativa mais sustentável são as cadeias de abastecimento alimentar curtas. Por esta razão, o objetivo desta dissertação é compreender se os consumidores portugueses estão conscientes do impacto que as longas distâncias de transporte dos produtos alimentares têm no ambiente e se estão dispostos a pagar mais por produtos alimentares que reduzirão as emissões de carbono por serem produzidos localmente. Para atingir o objetivo desta pesquisa, a recolha de dados consistiu numa observação, utilizada como estudo prévio, para confirmar as grandes distâncias de transporte e na aplicação de um questionário online para recolher informações sobre os consumidores. Os resultados da presente investigação elucidam que os consumidores portugueses estão conscientes dos benefícios ambientais da compra de produtos alimentares locais, mas no momento da compra estes não são os fatores mais importantes na decisão. Na realidade, são os menos importantes. Apesar disso, em geral, os consumidores estão dispostos a pagar mais pelos produtos locais.
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- 2022
208. The Shopping Centre as an Object of Desire: Attraction and Distance In Shopping Centre Choice
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Dennis, Charles and Dennis, Charles
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- 2005
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209. Why Do People Shop Where They Do? The Attributes of Shopping Centres that Determine Where Consumers Choose to Shop
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Dennis, Charles and Dennis, Charles
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- 2005
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210. Adolescent and caregiver attitudes towards telemedicine use in pediatric nephrology
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Sherry Coulson, Brooke Wile, Guido Filler, Yi Qiu, and Christopher W. McIntyre
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Male ,medicine.medical_specialty ,Telemedicine ,Travel distance ,020205 medical informatics ,Adolescent ,030209 endocrinology & metabolism ,02 engineering and technology ,Health informatics ,Health administration ,Caregiver attitudes ,03 medical and health sciences ,0302 clinical medicine ,Health care ,0202 electrical engineering, electronic engineering, information engineering ,Medicine ,Humans ,Adolescent attitudes ,Child ,Pandemics ,Chronic care ,business.industry ,Health Policy ,Nursing research ,Public health ,Clinic visits ,Attitude ,Caregivers ,Nephrology ,Family medicine ,Female ,Public aspects of medicine ,RA1-1270 ,business ,Qualitative research ,Research Article - Abstract
Background Telemedicine is increasingly utilized as an alternative to in person consultation. Current pandemic conditions are providing additional impetus to virtual care delivery. We compared both adolescent and caregiver (parent or guardian) attitudes towards telemedicine (here as tertiary center to remote health care location) as a crucial determinant of longer-term effectiveness. Methods This qualitative research study analyzed transcribed structured telephone interviews with both 11–18 year-old pediatric nephrology patients and their caregivers and performed a quantitative analysis of patient demographics, disease factors and distance to tertiary center vs. telemedicine center. Results The study was conducted in a medium-sized tertiary pediatric nephrology centre with a large catchment area of over 0.5 million square kilometers and 629,000 children and adolescents under 18 years of age. Eleven dyads of adolescents and caregivers were enrolled. Five adolescents were male. The mean age of the adolescents was 14.4 ± 2.5 years (range 11.2–18.0). The median distance to our tertiary center was 191 km (range 110–1378 km). Four adolescents lived more than 500 km from our tertiary center. The 11 adolescents had a total of 334 in person visits (mean 30 ± 25) and 86 telemedicine visits (mean 8 ± 7). A ratio of 2:1 telemedicine to in-person visits was favored; with caregivers more in favor of remote care than adolescents. Qualitative analysis found that experiences with telemedicine were distinguished by consultation-specific factors and contextual factors. Contextual factors (travel/cost savings) were valued for telemedicine by adolescents and caregivers. Consultation-specific factors, such as the ability to show the doctor physical symptoms, were more valued during in-person consultations, especially by adolescents. The overall visit type preference was related to the nature of the consultation. For regular check-ups, and for adolescents with less complex needs, participants felt that telemedicine offered a comparable experience to in-person visits. Adolescents with more complex conditions preferred in-person visits. Conclusions Indiscriminate transfer to chronic care predicated on mainly telemedicine approach is not compatible with user expressed attitudes (especially among adolescents). Accurately mapping models of care to these attitudes is an essential determinant of effective management and longer-term engagement with potentially life-long health challenges.
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- 2021
211. Optimal shape for a rectangular warehouse with a lateral receive / ship dock
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Di Luozzo, Sebastiano, Schiraldi, Massimiliano Maria, Di Luozzo, Sebastiano, and Schiraldi, Massimiliano Maria
- Abstract
Purpose: This technical note provides the mathematical demonstration for obtaining the optimal aspect ratio for a rectangular storage area with a lateral receive/ship dock, representing the standard configuration of modern distribution centers and logistic warehouses. The proposed aspect ratio is the one that minimizes the travel times of operators, keeping the common assumption of a storage area having a uniform access probability. Design/methodology/approach: To obtain the optimal aspect ratio of the storage area we model the entry point of the uniformly distributed dock with a random variable with a continuous uniform distribution, and we consequently evaluate the average travel path of the operator as a function of the latter. Successively, we estimate and minimize the average roundtrip length of the operator, leading to the optimal aspect ratio of the storage area. Findings: We find that the optimal aspect ratio between the warehouse width (U) and length (V) equals 1.5. The obtained result shows that the operators’ travel times are minimized with a storage area where . Research limitations/implications: Warehouses with a dock on one side now represent modern distribution centers' standard configuration. However, no optimal aspect ratio for the storage area has been discussed. For this reason, the paper fills this lack of scientific literature in the warehouse optimization research field by providing indications on how to design this class of warehouses. Practical implications: Distribution managers may find here guidance for defining a proper design of logistics centers and evaluating the operators' actual travel times to perform a roundtrip within the storage area. Originality/value: Traditional warehouse shape optimization models assume a single input/output point to the storage area. To our knowledge, no formal demonstration has been proposed for a warehouse with a dock on one entire side, Peer Reviewed
- Published
- 2022
212. Strategic Vehicle Routing in Practice — A pure Software Problem or a Problem Requiring Scientific Advice? Routing Problems of Daily Deliveries to the Same Customers
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Dillmann, Roland, Fandel, G., editor, Trockel, W., editor, Aliprantis, C. D., editor, Klose, Andreas, editor, Speranza, M. Gracia, editor, and Van Wassenhove, Luk N., editor
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- 2002
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213. Understanding the effect of sociodemographic, natural and built environment factors on cycling accessibility
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Juan P. Ospina, Juan C. Duque, Verónica Botero-Fernández, Mark Brussel, Digital Society Institute, Department of Urban and Regional Planning and Geo-Information Management, UT-I-ITC-PLUS, and Faculty of Geo-Information Science and Earth Observation
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Travel distance ,Geography, Planning and Development ,UT-Hybrid-D ,Transportation ,Cycling ,Network ,Accessibility ,General Environmental Science - Abstract
The concept of accessibility has gained considerable attention in the analysis of access to specific facilities for different populations. Unlike motorized systems in which there is no physical limit on the distance that can be traveled, the distance that a given cyclist can travel is variable and is determined by their personal characteristics and the environment. Such maximal travel distance is assumed to delimit the total extension of territory where all the potential interactions of a cyclist may take place and, therefore it affects the accessibility for people who cycle. Despite this variability in the area of influence of each cyclist, accessibility models assume, in the best of cases, a single maximum travel distance, which produces estimates of accessibility that are not very representative of reality. In this article we present more precise estimates of the accessibility of cyclists and compare them with traditional measures. The methodological improvement focuses on two aspects: (1) we calculate variable maximum distances based on the characteristics of the cyclists and the built urban environment. (2) Because the maximum travel distance depends on the characteristics of the built environment, we analyze the impact that the expansion of the dedicated cycling network has on accessibility. Our results reveal that the accessibility patterns depend on the individual characteristics and the built environment. Moreover, our results also confirm that the expansion and densification of the cycling network have an impact on the access to opportunities for cyclists that is not necessarily captured by most classical accessibility measures when considering the variability of cyclists' profiles.
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- 2022
214. Measuring travel time and distance in library use
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Jae Park, Sung
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- 2012
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215. The Effects of Travel Burden on Outcomes After Resection of Extrahepatic Biliary Malignancies: Results from the US Extrahepatic Biliary Consortium.
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O'Connor, Sean, Mogal, Harveshp, Russell, Gregory, Ethun, Cecilia, Fields, Ryan, Jin, Linda, Hatzaras, Ioannis, Vitiello, Gerardo, Idrees, Kamran, Isom, Chelsea, Martin, Robert, Scoggins, Charles, Pawlik, Timothy, Schmidt, Carl, Poultsides, George, Tran, Thuy, Weber, Sharon, Salem, Ahmed, Maithel, Shishir, and Shen, Perry
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SURGICAL excision , *GERM cell tumors , *CANCER patients , *INFLAMMATION , *PATHOLOGY , *HOSPITALS , *INCOME , *MEDICAL care , *RESEARCH funding , *SURVIVAL , *TRAVEL , *SPECIALTY hospitals , *TREATMENT effectiveness , *PROPORTIONAL hazards models , *RETROSPECTIVE studies ,BILE duct tumors - Abstract
Background: Surgical resection of extrahepatic biliary malignancies has been increasingly centralized at high-volume tertiary care centers. While this has improved outcomes overall, increased travel burden has been associated with worse survival for many other malignancies. We hypothesized that longer travel distances are associated with worse outcomes for these patients as well.Study Design: Data was analyzed from the US Extrahepatic Biliary Consortium database, which retrospectively reviewed patients who received resection of extrahepatic biliary malignancies at 10 high-volume centers. Driving distance to the patient's treatment center was measured for 1025 patients. These were divided into four quartiles for analysis: < 24.5, 24.5-57.2, 57.2-117, and < 117 mi. Cox proportional hazard models were then used to measure differences in overall survival.Results: No difference was found between the groups in severity of disease or post-operative complications. The median overall survival in each quartile was as follows: 1st = 1.91, 2nd = 1.60, 3rd = 1.30, and 4th = 1.39 years. Patients in the 3rd and 4th quartile had a significantly lower median household income (p = 0.0001) and a greater proportion Caucasian race (p = 0.0001). However, neither of these was independently associated with overall survival. The two furthest quartiles were found to have decreased overall survival (HR = 1.39, CI = 1.12-1.73 and HR = 1.3, CI = 1.04-1.62), with quartile 3 remaining significant after multivariate analysis (HR = 1.45, CI = 1.04-2.0, p = 0.028).Conclusions: Longer travel distances were associated with decreased overall survival, especially in the 3rd quartile of our study. Patients traveling longer distances also had a lower household income, suggesting that these patients have significant barriers to care. [ABSTRACT FROM AUTHOR]- Published
- 2017
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216. Changes to radiotherapy utilisation in Western NSW after the opening of a local service.
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Butler, Sally M.
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CANCER radiotherapy , *MEDICAL care , *CANCER patients , *CANCER treatment , *PUBLIC health - Abstract
Introduction In 2011, the first radiotherapy centre in Western NSW Local Health District (WNSWLHD) was opened in the city of Orange. Prior to this, patients travelled outside the health service, primarily to Sydney, to receive treatment. The aim of this study was to investigate if the establishment of the new rural radiotherapy service has changed the demographic profile, cancer type, treatment intent and number of patients treated. Methods Data were collected on WNSWLHD patients, 17 years of age and above, who received radiotherapy in either 2010 or 2012 in New South Wales (NSW) or Australian Capital Territory (ACT). The age, gender, treatment intent, cancer type and residential town were recorded. Results The number of patients who accessed radiation increased from 573 to 667 between 2010 and 2012. The corresponding radiotherapy utilisation (RTU) rates were 29.3% in 2010 and 33.4% in 2012, an improvement of 4.1% ( P = 0.01, 95% CI 1-7%). Patients travelled 128.5 km less for treatment in 2012 than in 2010 (338.7 km vs. 210.2 km, CI 111-145.5 km, P > 0.0001). All regions had an improvement in the RTU rates apart from the Remote region which decreased by 9% (31-20% in 2012). The number of palliative treatments increased significantly only within the Orange region. The number of male patients for treatments also significantly increased as there were 81 additional treatments (292 vs. 373) as did patients with a respiratory cancer (66 vs. 97). Conclusions A new radiotherapy service in a sparsely populated health district significantly changed the pattern of radiotherapy use for those who lived only in the Orange region. Treatment capacity at the Orange radiotherapy centre has doubled with the opening of a second linear accelerator since this study was conducted. Thus, a follow-up study is recommended to ascertain if radiotherapy rates remain low in the regions beyond Orange. [ABSTRACT FROM AUTHOR]
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- 2017
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217. A comparison of families of children with autism spectrum disorders in family daily routines, service usage, and stress levels by regionality.
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McAuliffe, Tomomi, Vaz, Sharmila, Falkmer, Torbjörn, and Cordier, Reinie
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AUTISM in children , *CHILD health services , *HEALTH services accessibility , *MULTIVARIATE analysis , *POPULATION density , *POPULATION geography , *STATISTICS , *PSYCHOLOGICAL stress , *FAMILY relations , *SECONDARY analysis , *DESCRIPTIVE statistics - Abstract
Purpose: To explore whether family routines, service usage, and stress levels in families of children with autism spectrum disorder differ as a function of regionality. Methods: Secondary analysis of data was undertaken from 535 surveys. Univariate and multivariate analyses were performed to investigate differences between families living in densely populated (DP) areas and less densely populated (LDP) areas. Results: Families living in LDP areas were found to: (1) have reduced employment hours (a two-parent household: Exp (B) = 3.48, p <.001, a single-parent household: Exp (B) = 3.32, p =.011); (2) travel greater distance to access medical facilities (Exp (B) = 1.27, p =.006); and (3) report less severe stress levels (Exp (B) = 0.22, p =.014). Conclusions: There were no differences in family routines; however, flexible employment opportunities and travel distance to medical services need to be considered in families living in LDP areas. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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218. Evaluating the susceptibility of landslide landforms in Japan using slope stability analysis: a case study of the 2016 Kumamoto earthquake.
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Chen, Chi-Wen, Chen, Hongey, Wei, Lun-Wei, Lin, Guan-Wei, Iida, Tomoyuki, and Yamada, Ryuji
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LANDSLIDES , *LANDSLIDE hazard analysis , *LANDFORMS , *EARTHQUAKES , *DISASTER resilience - Abstract
This study analyzed 267 landslide landforms (LLs) in the Kumamoto area of Japan from the database of about 0.4 million LLs for the whole of Japan identified from aerial photos by the National Research Institute for Earth Science and Disaster Resilience of Japan (NIED). Each LL in the inventory is composed of a scarp and a moving mass. Since landslides are prone to reactivation, it is important to evaluate the sliding-recurrence susceptibility of LLs. One possible approach to evaluate the susceptibility of LLs is slope stability analysis. A previous study found a good correlation ( R = 0.99) between the safety factor ( F ) and slope angle ( α) of F = 17.3 α . We applied the equation to the analysis of F for 267 LLs in the area affected by the 2016 Kumamoto earthquake ( M = 7.3). The F was calculated for the following three cases of failure: scarps only, moving mass only, and scarps and moving mass together. Verification with the 2016 Kumamoto earthquake event shows that the most appropriate method for the evaluation of LLs is to consider the failure of scarps and moving mass together. In addition, by analyzing the relationship between the factors of slope of entire landslide and slope of scarp for LLs and comparing the results with the Aso-ohashi landslide, the largest landslide caused by the 2016 Kumamoto earthquake, we also found that morphometric analysis of LLs is useful for forecasting the travel distance of future landslides. [ABSTRACT FROM AUTHOR]
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- 2017
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219. A simple command to calculate travel distance and travel time.
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Weber, Sylvain and Péclat, Martin
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TRAVEL time (Traffic engineering) , *COORDINATES , *MATHEMATICAL models - Abstract
Obtaining the routing distance between two addresses should not be a hassle with current technology. Unfortunately, this is more complicated than it first seems. Recently, several commands have been implemented for this purpose (traveltime, traveltime3, mqtime, osrmtime), but most of them became obsolete only a few months after their introduction or appear complicated to use. In this article, we introduce the community-contributed command georoute, which retrieves travel distance and travel time between two points defined either by their addresses or by their geographical coordinates. Compared with other existing commands, it is simple to use, efficient in terms of computational speed, and versatile regarding the information that can be provided as input. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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220. Considering Tobler's first law of geography in a tourism context.
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Joo, Dongoh, Woosnam, Kyle M., Shafer, C. Scott, Scott, David, and An, Soyoung
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TOURISM ,TOURIST attractions ,SOLIDARITY ,MULTIVARIATE analysis ,REGRESSION analysis - Abstract
Despite potential benefits from applying Tobler's law in a tourism context, the law has been used sparingly within the tourism literature. This study seeks to expand the use of Tobler's law in tourism research by examining the relationship between tourists' distance travelled to a destination and the perceived degree of emotional closeness such visitors have with community residents. In doing so, visitor data from three uniquely distinct Texas destinations were analyzed. Results suggest that visitors to the destinations not only differed in their average travel distances, but also the perceived levels of emotional solidarity with residents. Results supported Tobler's law in a tourism context, whereby results indicated that the further an individual travelled to a destination, the less they agreed with feeling close to destination residents. Implications and future research direction opportunities are offered at the close of the work. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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221. Scheduling the Australian Football League.
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Kyngäs, Jari, Nurmi, Kimmo, Kyngäs, Nico, Lilley, George, Salter, Thea, and Goossens, Dries
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SCHEDULING ,TELEVISION viewers ,TIME management ,AUSTRALIAN football tournaments - Abstract
Generating a schedule for a professional sports league is an extremely demanding task. Good schedules have many benefits for the league, such as higher attendance and TV viewership, lower costs and increased fairness. The Australian Football League is particularly interesting because of an unusual competition format integrating a single round-robin tournament with additional games. Furthermore, several teams have multiple home venues and some venues are shared by multiple teams. This paper presents a 3-phase process to schedule the Australian Football League. The resulting solution outperforms the official schedule with respect to minimizing and balancing travel distance and breaks, while satisfying more requirements. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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222. Excess kindergarten travel in Changchun, Northeast China: A measure of residence-kindergarten spatial mismatch.
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Cheng, Lin, Chen, Chen, and Xiu, Chunliang
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TRAVEL , *KINDERGARTEN , *SPATIAL mismatch hypothesis , *SCHOOL enrollment , *PUBLIC spending - Abstract
Home-kindergarten travel is an important urban travel activity. This paper firstly discussed the relationship between excess kindergarten travel and residence-kindergarten spatial mismatch. And then questionnaires and GIS are used to provide some baseline analyses of their distribution pattern both statistically and spatially in Changchun. Thirdly, we provide an exploratory analysis of the causes of excess kindergarten travel and spatial mismatch. Results indicate that a) kindergartens in Changchun are highly accessible if children attend their nearest kindergartens, b) however, there is numerous excess travel and high degree of spatial mismatch, nearly 87.1% of the kindergarteners travel excessively, c) the excess travel distances in inner city are much shorter than other areas, and the corresponding spatial mismatch degree is lower. Two critical factors influencing excess kindergarten travel and residence-kindergarten spatial mismatch are summarized. Firstly, the actual causes are a) parents' personal preferences and kindergarten choice tendencies, b) Danwei owned kindergartens generally with higher quality, tendentious enrollment policies, charge threshold, and c) the widespread use of private cars. Secondly, the root causes are limited public expenditure on kindergarten education and its unbalanced allocation, as well as Chinese traditional concept and prevailing way of parenting. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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223. Transport habits of travelers using new energy type modes: A random parameters hazard-based approach of travel distance.
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Anastasopoulos, Panagiotis Ch., Fountas, Grigorios, Sarwar, Md Tawfiq, Karlaftis, Matthew G., and Sadek, Adel W.
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PSYCHOLOGY of travelers , *HABIT (Philosophy) , *TRANSPORTATION & the environment , *TRAVEL time (Traffic engineering) , *CARBON dioxide mitigation , *METROPOLITAN areas , *SOCIOECONOMICS - Abstract
With environmental concerns on the rise, identifying the factors that affect travel demand for energy efficient and environmentally friendly means of transportation becomes critical. It is, thus, beneficial to identify the characteristics of new energy type – low CO 2 emissions – transport habits. Travel time is one such characteristic that has been extensively studied within the context of activity-based travel demand modeling. However, when travelers choose a new energy type with low CO 2 emissions transport mode, it is likely that travel time may be playing a secondary role in their mode choice criteria as opposed to travel distance, especially in highly congested urban areas. Within this context, the origin-destination distance of a trip has the potential to reveal interesting traveler preferences and trip patterns. This paper presents an exploratory empirical analysis of origin-destination distance for such new energy type mode transport habits, in the Metropolitan area of Athens, Greece. Using hazard-based econometric modeling and random parameters to account for the longitudinal nature of trip distance and unobserved heterogeneity, respectively, trip distance is found to be affected by a number of influential factors, such as traveler socio-economic and demographic characteristics, trip purpose, trip time, trip frequency, and time of day for the trip. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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224. Travel, Treatment Choice, and Survival Among Breast Cancer Patients: A Population-Based Analysis
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Beth A Virnig, Hannah T. Neprash, Colleen F. Longacre, Nathan D. Shippee, and Todd M Tuttle
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Oncology ,medicine.medical_specialty ,patient decision making ,business.industry ,Treatment options ,Cancer survival ,Population based ,medicine.disease ,travel distance ,Breast cancer ,breast cancer ,Internal medicine ,medicine ,radiation treatment ,Original Article ,business - Abstract
Background: Travel distance to care facilities may shape urban–rural cancer survival disparities by creating barriers to specific treatments. Guideline-supported treatment options for women with early stage breast cancer involves considerations of breast conservation and travel burden: Mastectomy requires travel for surgery, whereas breast-conserving surgery (BCS) with adjuvant radiation therapy (RT) requires travel for both surgery and RT. This provides a unique opportunity to evaluate the impact of travel distance on surgical decisions and receipt of guideline-concordant treatment. Materials and Methods: We included 61,169 women diagnosed with early stage breast cancer between 2004 and 2013 from the Surveillance Epidemiology and End Results (SEER)-Medicare database. Driving distances to the nearest radiation facility were calculated by using Google Maps. We used multivariable regression to model treatment choice as a function of distance to radiation and Cox regression to model survival. Results: Women living farthest from radiation facilities (>50 miles vs.
- Published
- 2021
225. Geographic disparities in disruptions to abortion care in Louisiana at the onset of the COVID-19 pandemic
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Nancy F. Berglas, Kari White, Rosalyn Schroeder, and Sarah C.M. Roberts
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Geographic disparities ,Travel distance ,Geography ,Induced ,Clinical Sciences ,Abortion ,Obstetrics and Gynecology ,COVID-19 ,Abortion, Induced ,Louisiana ,Paediatrics and Reproductive Medicine ,Good Health and Well Being ,Reproductive Medicine ,Pregnancy ,Public Health and Health Services ,Humans ,Female ,Healthcare Disparities ,Obstetrics & Reproductive Medicine ,Pandemics - Abstract
ObjectivesPrior research identified a significant decline in the number of abortions in Louisiana at the onset of the COVID-19 pandemic, as well as increases in second-trimester abortions and decreases in medication abortions. This study examines how service disruptions in particular areas of the state disparately affected access to abortion care based on geography.Study designWe collected monthly service data from Louisiana's abortion clinics (January 2018-May 2020) and conducted mystery client calls to determine whether clinics were scheduling appointments at pandemic onset (April-May 2020). We used segmented regression to assess whether service disruptions modified the main pandemic effects on the number, timing, and type of abortions using stratified models and interaction terms. Additionally, we calculated the median distance that Louisiana residents traveled to the clinic where they obtained care.ResultsFor residents whose closest clinic was consistently scheduling appointments at the onset of the pandemic, the number of monthly abortions did not change (IRR=1.07, 95% CI: 0.84-1.36). For those whose closest clinic services were disrupted, the number of monthly abortions decreased by 46% (IRR=0.54, 95% CI: 0.45-0.65). Similarly, increases in second-trimester abortions and decreases in medication abortions were concentrated in areas where residents experienced service disruptions (AOR=2.25, 95% CI: 1.21-4.56 and AOR=0.59, 95% CI: 0.29-0.87, respectively) and were not seen elsewhere in the state.ConclusionChanges in the number, timing and type of abortions were concentrated among residents in particular areas of Louisiana. The early stages of the COVID-19 pandemic exacerbated geographic disparities in access to abortion care.ImplicationsDisruptions in services at the beginning of the COVID-19 pandemic in Louisiana meaningfully affected pregnant people's ability to obtain an abortion at their nearest clinic. These findings reinforce the importance of developing mechanisms to support pregnant people during emergency situations when traveling to a nearby clinic is no longer possible.
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- 2022
226. Numerical Characterization of Contaminant Transport in Nested Two-Scale Porous Media
- Author
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Ruan, Feng, Mclaughlin, Dennis, Soares, Amílcar, editor, Gómez-Hernandez, Jaime, editor, and Froidevaux, Roland, editor
- Published
- 1997
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227. Nondestructive Evaluation of Wood using Ultrasonic Frequency Domain Analysis
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Halabe, Udaya B., GangaRao, Hota, Hota, V. Rao, Thompson, Donald O., editor, and Chimenti, Dale E., editor
- Published
- 1995
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228. Impact of nationwide centralization of oesophageal, gastric, and pancreatic surgery on travel distance and experienced burden in the Netherlands
- Author
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Pauline A. J. Vissers, Valery E.P.P. Lemmens, Joos Heisterkamp, Meindert N. Sosef, Josianne Luijten, W.O. de Steur, H.C. van Santvoort, Marc G. Besselink, Jelle P. Ruurda, B. Groot Koerkamp, P. van Duijvendijk, Camiel Rosman, I.H.J.T. de Hingh, G.A.P. Nieuwenhuijzen, H.W.M. van Laarhoven, Oncology, CCA - Cancer Treatment and Quality of Life, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, Surgery, and Public Health
- Subjects
Male ,medicine.medical_specialty ,Hospitals, Low-Volume ,Travel distance ,Esophageal Neoplasms ,Health Services Accessibility ,Pancreatic surgery ,Tumours of the digestive tract Radboud Institute for Health Sciences [Radboudumc 14] ,Cost of Illness ,SDG 3 - Good Health and Well-being ,Stomach Neoplasms ,Kilometer ,Surveys and Questionnaires ,Pancreatic cancer ,medicine ,Hospital Planning ,Humans ,Referral and Consultation ,Digestive System Surgical Procedures ,Aged ,Netherlands ,Travel ,business.industry ,Surgical care ,Age Factors ,Cancer ,Centralization ,Travel burden ,General Medicine ,Middle Aged ,medicine.disease ,Hospitals ,Pancreatic Neoplasms ,Logistic Models ,Surgical Oncology ,Oncology ,Multivariate Analysis ,Emergency medicine ,Female ,Surgery ,Ordered logit ,Health Expenditures ,business ,human activities ,Hospitals, High-Volume - Abstract
Background: This study aims to assess the impact of nationwide centralization of surgery on travel distance and travel burden among patients with oesophageal, gastric, and pancreatic cancer according to age in the Netherlands. As centralization of care increases to improve postoperative outcomes, travel distance and experienced burden might increase. Materials and methods: All patients who underwent surgery between 2006 and 2017 for oesophageal, gastric and pancreatic cancer in the Netherlands were included. Travel distance between patient's home address and hospital of surgery in kilometres was calculated. Questionnaires were used to assess experienced travel burden in a subpopulation (n = 239). Multivariable ordinal logistic regression models were constructed to identify predictors for longer travel distance. Results: Over 23,838 patients were included, in whom median travel distance for surgical care increased for oesophageal cancer (n = 9217) from 18 to 28 km, for gastric cancer (n = 6743) from 9 to 26 km, and for pancreatic cancer (n = 7878) from 18 to 25 km (all p < 0.0001). Multivariable analyses showed an increase in travel distance for all cancer types over time. In general, patients experienced a physical and social burden, and higher financial costs, due to traveling extra kilometres. Patients aged >70 years travelled less often independently (56% versus 68%), as compared to patients aged
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- 2022
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229. Prediction of Concrete Fragments Amount and Travel Distance under Impact Loading Using Deep Neural Network and Gradient Boosting Method
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Kyeongjin Kim, WooSeok Kim, Junwon Seo, Yoseok Jeong, Meeju Lee, and Jaeha Lee
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Technology ,Microscopy ,QC120-168.85 ,smoothed particle hydrodynamics ,concrete median barrier ,gradient boosting machine ,deep neural network ,artificial neural network ,fragments ,travel distance ,QH201-278.5 ,Engineering (General). Civil engineering (General) ,TK1-9971 ,Descriptive and experimental mechanics ,General Materials Science ,Electrical engineering. Electronics. Nuclear engineering ,TA1-2040 - Abstract
In the present study, the amount of fragments generated and their travel distances due to vehicle collision with concrete median barrier (CMB) was analyzed and predicted. In this regard, machine learning was applied to the results of numerical analysis, which were developed by comparing with field test. The numerical model was developed using smoothed particle hydrodynamics (SPH). SPH is a mesh-free method that can be used to predict the amount of fragments and their travel distances from concrete structures under impact loading. In addition, deep neural network (DNN) and gradient boosting machine (GBM) were also employed as machine learning methods. In this study, the results of DNN, GBM, and numerical analysis were then compared with the conducted field test. Such comparisons revealed that numerical analysis generated lower error than both DNN and GBM. When prediction results of both the amount of fragments and their travel distances were considered, the result of DNN showed smaller errors than that of GBM. Therefore, in studies where machine learning is used to predict the amount of fragments and their travel distances, careful selection of an appropriate method from the various available machine learning methods such as DNN, GBM, and random forest is absolutely important.
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- 2022
230. Public bike users' annual travel distance: Findings from combined data of user survey and annual rental records.
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Namkung, Ok Stella, Park, Jonghan, and Ko, Joonho
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- *
NEIGHBORHOOD characteristics , *BICYCLES , *CHOICE of transportation , *RENTAL trucks , *REGRESSION analysis - Abstract
The public bikesharing (PBS) scheme has been recognized as a sustainable transport mode. However, to promote its use, it is crucial to understand the travel behavior of PBS subscribers. This study intends to determine the factors associated with PBS subscribers' annual public bike distance, which is yet to be noted in the literature. We build up a dataset for the PBS scheme in Seoul, South Korea, by combining its 2019 rental records with a questionnaire survey addressed to its subscribers. The combined dataset containing 1,652 PBS users' detailed personal information and yearly rental records enables us to explain the subscribers' annual PBS distance along with their socio-demographic characteristics, travel behavior, perceived benefit from PBS use, and land-use characteristics of their neighborhoods. By adopting mixed-effect gamma regression models, we identify that the heterogeneity of neighborhoods has around 7.5% random effects on subscribers' annual PBS travel distance on weekdays and weekends. Based on the combined data, we can explain the public bike travel behavior from both a long-term as well as user-oriented perspective. We expect this study to not only enhance policymakers' and planners' fundamental understanding of long-term public bike use patterns, but also help them prepare an integrated mobility system in the future. [ABSTRACT FROM AUTHOR]
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- 2023
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231. Travel Burden as a Measure of Healthcare Access and the Impact of Telehealth within the Veterans Health Administration.
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Hahn Z, Hotchkiss J, Atwood C, Smith C, Totten A, Boudreau E, Folmer R, Chilakamarri P, Whooley M, and Sarmiento K
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- Humans, Health Services Accessibility, Retrospective Studies, Travel, Travel-Related Illness, United States epidemiology, United States Department of Veterans Affairs, Veterans Health, Telemedicine, Veterans
- Abstract
Background: Travel is a major barrier to healthcare access for Veteran Affairs (VA) patients, and disproportionately affects rural Veterans (approximately one quarter of Veterans). The CHOICE/MISSION acts' intent is to increase timeliness of care and decrease travel, although not clearly demonstrated. The impact on outcomes remains unclear. Increased community care increases VA costs and increases care fragmentation. Retaining Veterans within the VA is a high priority, and reduction of travel burdens will help achieve this goal. Sleep medicine is presented as a use case to quantify travel related barriers., Objective: The Observed and Excess Travel Distances are proposed as two measures of healthcare access, allowing for quantification of healthcare delivery related to travel burden. A telehealth initiative that reduced travel burden is presented., Design: Retrospective, observational, utilizing administrative data., Subjects: VA patients with sleep related care between 2017 and 2021. In-person encounters: Office visits and polysomnograms; telehealth encounters: virtual visits and home sleep apnea tests (HSAT)., Main Measures: Observed distance: distance between Veteran's home and treating VA facility. Excess distance: difference between where Veteran received care and nearest VA facility offering the service of interest. Avoided distance: distance between Veteran's home and nearest VA facility offering in-person equivalent of telehealth service., Key Results: In-person encounters peaked between 2018 and 2019, and have down trended since, while telehealth encounters have increased. During the 5-year period, Veterans traveled an excess 14.1 million miles, while 10.9 million miles of travel were avoided due to telehealth encounters, and 48.4 million miles were avoided due to HSAT devices., Conclusions: Veterans often experience a substantial travel burden when seeking medical care. Observed and excess travel distances are valuable measures to quantify this major healthcare access barrier. These measures allow for assessment of novel healthcare approaches to improve Veteran healthcare access and identify specific regions that may benefit from additional resources., (© 2023. The author(s).)
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- 2023
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232. Clinical features and outcome of retinoblastoma at the Vietnam National Cancer Hospital.
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Do KH, Pham CTM, Do TC, Hoang TT, Hoang TA, Nguyen CV, Bui GV, Ngo LL, Van Nguyen T, and Le QV
- Abstract
Objectives: To characterize the clinical features, treatment, and outcome of children diagnosed with retinoblastoma (RB) at Vietnam National Cancer Hospital., Methods: The study enrolled all RB patients newly diagnosed at Vietnam National Cancer Hospital from January 2018 to December 2022. The primary endpoint was overall survival (OS) and the eye salvage rate., Results: In total, 139 patients were enrolled, 51.8% patients were male. Median age was 18.9 months. Most patients presented with leukocoria (63.3%), followed by strabismus (14.4%), and 43.9% had bilateral disease. Of 200 eyes, 129 (64.5%) were classified as group E. Extraocular extension was noted in 10 of 139 patients (7.2%). About one-third of the patients lived more than 300 kilometers (km) away from these hospitals, and 17.3% of the patients belonged to minority groups, both of which were dominated by group E and extraocular or high-risk eyes at the time of consultation. Primary enucleation was done for 57 eyes (28.5%), and 51 of 61 patients (83.6%) received eye salvage therapy in bilateral RB group. At study closure, 127 children were alive at the last follow-up, 12 cases were confirmed dead. The 5-year OS and progression-free survival (PFS) rates were 90.3% and 85.9%, respectively. In particular, ethnic minority, distance to hospital more than 150 km, and extraocular disease were significantly associated with higher mortality among children with RB treated in Vietnam National Cancer Hospital., Conclusions: There is a need to support for screening RB with early symptoms in grassroots medical facilities and raise awareness among patients' families through health education programs. Besides, caring and supporting treatment for patients from the ethnic minority and who live far from hospitals are also extremely necessary., (© 2023 Wiley Periodicals LLC.)
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- 2023
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233. CONTROL FACILITY LAYOUT PROBLEMS IN CONSTRUCTION PROJECT SITES IN IRAQ
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Entisar Kadhim Rasheed
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facility ,Construction site management ,layout of site facilities ,Optimization ,travel distance ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The layout of temporary facilities in a construction site deals with the selection of the most efficient layout in order to operate efficiently and cost-effectively. The layout design seeks the best arrangement of facilities within the available area. In the design process of the layout, many objectives must be considered to effectively utilize people resources, equipment, space, and energy. The research aims to design practical scheme to locate the temporary facilities in construction sites with less travel distance between them, so it has been to follow the scientific methodology of the research included two phases, the first was the study of theoretical research and previous studies relating to research, and represented the second phase of the study process which has been used in two ways, namely: a survey field for a number of experienced in construction sites management and analysis of answers and compare them with the theoretical study while the second way to use the results of phases theory and practice in the design of a mathematical model to accomplish the aim of the research to reach optimum planning for the sites of temporary facilities in construction sites and using the software Matlab to find in the minimum transition between each pair of these facilities and minimum distance between all of the facilities The results showed through a survey of experts need to design places of temporary facilities right before starting the implementation of the project...
- Published
- 2015
234. Factors associated with negative co-parenting experiences in families of a child with autism spectrum disorder.
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Sim, Angela, Cordier, Reinie, Vaz, Sharmila, Netto, Julie, and Falkmer, Torbjörn
- Subjects
- *
AUTISM , *SIBLINGS , *FAMILIES , *INCOME , *MENTAL health , *CLASSIFICATION of mental disorders , *MULTIVARIATE analysis , *PARENT-child relationships , *PARENTING , *QUESTIONNAIRES , *REHABILITATION , *RESEARCH funding , *TRAVEL , *LOGISTIC regression analysis , *WELL-being , *DATA analysis software , *DISEASE complications - Abstract
Purpose: The purpose of this study was to identify key factors associated with negative co-parenting experiences in parents raising a child with autism spectrum disorder. Methods: Questionnaires were sent to families with one or more children with a diagnosis of autism spectrum disorder. Parents of 142 children with autism spectrum disorder indicated that the diagnosis had a very negative impact on their co-parent relationship. A multivariate logistic regression model was run to analyze the association of these experiences with various demographic, family and community factors. Results: Three factors were associated with negative co-parenting relationships: (1) family stress due to the child's diagnosis, (2) effects of the diagnosis on parents' relationship with their other children and (3) distance travelled to the nearest medical facility. Conclusions: Findings highlight the need to further explore family dynamics, particularly the relationships between the co-parenting alliance, other family members and the extra-familial environment. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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235. Travel distance to prenatal care and high blood pressure during pregnancy.
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Shi, Lu, MacLeod, Kara E., Zhang, Donglan, Wang, Fan, and Chao, Margaret Shin
- Subjects
PRENATAL care ,HYPERTENSION in pregnancy ,SELF-evaluation ,PHYSICAL activity ,CONFIDENCE intervals ,HEALTH services accessibility ,SURVEYS ,SOCIOECONOMIC factors ,THERAPEUTICS - Abstract
Objective: To assess whether poor geographic accessibility to prenatal care, as indicated by long distance trips to prenatal care, produced high blood pressure (HPB) during pregnancy.Methods: Using the 2007 Los Angeles Mommy and Baby Study for women without hypertension prior to pregnancy (n = 3405), we compared self-reported HBP by travel distance to prenatal care controlling for age, race/ethnicity, marital status, education, household income, weight status, and physical activity.Results: Results of the multilevel logistic regression shows traveling more than 50 mi to prenatal care is associated with an increased odds for having HPB during pregnancy (odds ratio [OR] = 2.867, 95% confidence interval [CI] = 1.079,7.613), as compared with a travel distance shorter than 5 mi. Traveling 5-14 mi (OR = 0.917, 95% CI = 0.715-1.176), 15-29 mi (OR = 0.955, 95% CI = 0.634-1.438), or 30-50 mi (OR = 1.101, 95% CI = 0.485-2.499) were not significantly associated with more risk of HBP during pregnancy.Conclusion: To our knowledge, no previous studies have examined the association between poor geographic accessibility to care and the possible harms of travel burdens for pregnant women. Future research that replicates these findings can assist in developing recommendations for pregnant women and health-care accessibility. [ABSTRACT FROM AUTHOR]- Published
- 2017
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236. Modelling tourists' length of stay: A call for a 'back-to-basic' approach.
- Author
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Thrane, Christer
- Subjects
TOURISTS ,ECONOMETRICS ,LEAST squares ,REGRESSION analysis ,WORKMANSHIP ,PARSIMONIOUS models - Abstract
Modelling of tourists' length of stay (LOS) is an expanding topic of study. A common thread in this literature is the use of sophisticated statistical/econometric methods. The present study builds on and extends an article critical of the statistical craftsmanship in prior LOS modelling studies. On the basis of an updated assessment of current practice and two small-scale case studies, two main conclusions are drawn. First, the available evidence suggests that the ordinary least squares (OLS) regression model produces qualitatively similar findings to much more complicated methods, such as duration and count data models. The principle of parsimony and the so-called KISS rule thus dictate that OLS regression analysis should be the preferred estimation technique in LOS modelling studies. Second, the quality of LOS modelling studies will most likely be improved by intensifying the use of the long-established tools of the trade explicated in influential econometric textbooks rather than by testing new estimation methods. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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237. LOG HAULING PRODUCTIVITY IN TIMBER HARVESTING OPERATION IN PENINSULAR MALAYSIA FOREST.
- Author
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Norizah, K., Mohd-Hasmadi, I., Husna, S., and Chung, W.
- Subjects
- *
LOG transportation , *LUMBER industry , *TIMBER , *LOGGING trucks , *PREDICTION models - Abstract
The study continuously recorded working elements and log hauling activities of log trucks. The variables measured were travel distance, number of logs and log volume which were regressed with hauling time and productive machine hour (m³ PMH-1) using stepwise method via data analysis in Excel. Travel distance and the number of logs hauled per truck were found to be significantly corelated with hauling time, while all the three variables were significantly corelated with productivity. The equation models for both hauling time and productivity were developed using significantly tested variables. On average, productivity of free delay time of log hauling at the study area was 8.36 ± 2.49 m³ PMH-1 and the operation cost of log truck was RM25.08. Thus, the unit cost of log hauling activities was estimated at RM3.80 m-3. The developed prediction model of hauling time, productivity and cost analysis could be used to plan timber harvesting activities with improved productivity and decreased cost. [ABSTRACT FROM AUTHOR]
- Published
- 2016
238. Large Rock Slope Failures Induced by Recent Earthquakes.
- Author
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Aydan, Ö.
- Subjects
- *
EARTHQUAKES , *ROCK slopes , *STRUCTURAL failures , *ROCK mechanics , *FAILURE analysis - Abstract
Recent earthquakes caused many large-scale rock slope failures. The scale and impact of rock slope failures are very large, and the form of failure differs depending upon the geological structures of slopes. First, the author briefly describes some model experiments to investigate the effects of shaking or faulting due to earthquakes on rock slopes. Then, fundamental characteristics of the rock slope failures induced by the earthquakes are described and evaluated according to some empirical and theoretical models. Furthermore, the observations for slope failures in relation to earthquake magnitude and epicenter or hypocenter distance were compared with several empirical relations available in the literature. Some of major rock slope failures induced by earthquakes are selected, and the post-failure motions are simulated and compared with observations. In addition, the effects of tsunamis on rock slopes in view of observations in the reconnaissances of the recent mega-earthquakes are explained and are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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239. Travel burden and dentist bypass among dentally insured children.
- Author
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McKernan, Susan C., Pooley, Mark J., Momany, Elizabeth T., and Kuthy, Raymond A.
- Subjects
MEDICAID ,DENTAL care ,DATA analysis ,DATA binning ,MODEL validation ,CHILDREN'S dental care ,HEALTH services accessibility ,DENTAL insurance ,TRAVEL - Abstract
Objectives: Using administrative data from Iowa Medicaid and a large private dental insurer, we compared distance to the nearest primary care dentist for children ages 6-15 in 2012. Additionally, we examined rates of provider bypass in both populations as an indicator of spatial accessibility to dental care.Methods: We calculated measures of travel burden, including distance to the nearest primary care dentist and distance to current primary care dentist. Distance outcomes and rates of bypass, traveling beyond the nearest dentist for care, were compared by insurance type.Results: We found that Medicaid-enrolled children lived farther from the nearest dentist and farther from their current dentist than privately insured children. However, rates of bypass were higher among the privately insured population. These results were consistent among urban and rural residents; additionally, both rural populations demonstrated greater travel distances than urban dwellers.Conclusions: Travel burden was greater among Medicaid-enrolled children. Lower rates of bypass, in conjunction with lower rates of dental utilization in this population, may indicate a distance threshold beyond which dental care becomes unattainable. [ABSTRACT FROM AUTHOR]- Published
- 2016
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240. Wildlife speed cameras: measuring animal travel speed and day range using camera traps.
- Author
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Rowcliffe, J. Marcus, Jansen, Patrick A., Kays, Roland, Kranstauber, Bart, and Carbone, Chris
- Published
- 2016
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241. Walking, cycling and the urban form: A Heckman selection model of active travel mode and distance by young adolescents.
- Author
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Kaplan, Sigal, Nielsen, Thomas Alexander Sick, and Prato, Carlo Giacomo
- Subjects
- *
SEDENTARY behavior in children , *HUMAN locomotion , *WALKING speed , *CYCLING training , *TRAVEL clubs - Abstract
Physical inactivity of children and adolescents is a major public health challenge of the modern era but, when adequately promoted and nurtured, active travel offers immediate health benefits and forms future sustainable and healthy travel habits. This study explores jointly the choice and the extent of active travel of young adolescents while considering walking and cycling as distinct travel forms, controlling for objective urban form measures, and taking both a “street-buffer” looking at the immediate home surroundings and a “transport-zone” looking at wider neighborhoods. A Heckman selection model represents the distance covered while cycling (walking) given the mode choice being bicycle (walk) for a representative sample of 10–15 year-olds from the Capital Region of Denmark extracted from the Danish national travel survey. Results illustrate the necessity of different urban environments for walking and cycling, as the former relates to “street-buffer” urban form measures and the latter also to “transport-zone ” ones. Results also show that lessening the amount and the density of car traffic, diminishing the movement of heavy vehicles in local streets, reducing the conflict points with the density of intersections, and intervening on crash frequency and severity, would increase the probability and the amount of active travel by young adolescents. Last, results indicate that zones in rural areas and at a higher percentage of immigrants are likely to have lower probability and amount of active travel by young adolescents. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
242. 剖析台灣民眾的就醫流動:利用引力模式評估就醫距離與醫療資源分布的影響
- Author
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林民浩, 郭年真, 陳威全, and 溫在弘
- Abstract
Objectives: Township-level physician-to-population and hospital bed-to-population ratios have been widely adopted as indicators of health care accessibility in Taiwan; however, these indicators cannot reflect actual healthcare-seeking behaviors of patients. Therefore, the aims of this study were to establish actual patient flow for seeking healthcare and to clarify the factors influencing preferences for seeking healthcare. Methods: We estimated the residence and collected the locations of healthcare visits for each patient from the nationwide Longitudinal Health Insurance Database in 2010 to establish an origin-destination matrix. The patient flow among townships could be conducted from the matrix. The weighted travel distance of healthcare visits was developed as a new indicator of accessibility. The gravity model was then used to analyze the patient flow and assess the influences of travel distance and healthcare resources. Results: Using the weighted travel distance, eastern Taiwan and the coastal areas of Yunlin and Chiayi were identified as the poorest accessibility for healthcare resources. The results of the gravity model showed that travel distance was the major factor correlated negatively with the volumes of outpatient and inpatient/emergency flow; however, the abundance of healthcare resources positively influenced the preference of inpatient/emergency patients from their residence to neighborhood regions for seeking healthcare. Conclusions: The weighted travel distance could properly reflect the access of healthcare. We conclude that travel distance is the major factor which influences patient flow for seeking healthcare. In contrast, people tend to choose the healthcare facilities with abundant resources for seeking inpatient/emergency healthcare. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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243. Calculate travel time and distance with OpenStreetMap data using the Open Source Routing Machine (OSRM).
- Author
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Huber, Stephan and Rust, Christoph
- Subjects
- *
OPEN source software , *COMPUTER software , *ROUTING (Computer network management) - Abstract
In this article, we introduce the osrmtime command, which calculates the distance and travel time between two points using latitude and longitude information. The command uses the Open Source Routing Machine (OSRM) and OpenStreetMap to find the optimal route by car, by bicycle, or on foot. The procedure is specially built for large georeferenced datasets. Because it is fast, the command uses the full computational capacity of a PC, allows the user to make unlimited requests, and is independent of the Internet and commercial online providers. Hence, there is no risk of the command becoming obsolete. Moreover, the results can be replicated at any time. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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244. Influence of neighborhood types on trip distances: Spatial error models for Central Ohio.
- Author
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Akar, Gulsah, Chen, Na, and Gordon, Steven I.
- Subjects
- *
LAND use , *TRANSPORTATION , *MATHEMATICAL models , *AUTOCORRELATION (Statistics) , *CLUSTER analysis (Statistics) - Abstract
This study examines the relationships between land-use, transportation infrastructure, household, and individual characteristics and the resulting average and daily trip distances using data from the 1999 Mid-Ohio Area Household Travel Survey. Spatial error models are developed to analyze the determinants of average and daily trip distances at the person level. First, new neighborhood categories are created usingK-means cluster analysis and several land-use and built-environment variables. Then, these new neighborhood categories (such as central city residential areas, medium-density suburbs, low-density suburbs, etc.) are used as independent variables to explain the resulting average and total trip distances, while controlling for sociodemographics, access to transit and bicycle facilities, and spatial autocorrelation. The results indicate that the residential location characteristics are a significant factor in explaining trip distances; people who live in areas that are away from urban centers and with a low mix of employment and population travel longer distances. For the Central Ohio Region, residing in lowest-density suburbs may add up to 44% to average trip distances and 33% to daily trip distances. [ABSTRACT FROM PUBLISHER]
- Published
- 2016
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245. Influence of the distance between home and the hospital on patients with surgically resected non-small-cell lung cancer.
- Author
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Tomoyoshi Takenaka, Eiko Inamasu, Tsukihisa Yoshida, Gouji Toyokawa, Kaname Nosaki, Fumihiko Hirai, Masafumi Yamaguchi, Takashi Seto, Mitsuhiro Takenoyama, and Yukito Ichinose
- Subjects
- *
HOSPITAL-based home care programs , *NON-small-cell lung carcinoma , *CANCER treatment , *SURGICAL excision , *HEALTH outcome assessment , *ONCOLOGY - Abstract
OBJECTIVES: There have been no previous reports examining how the travel distance affects the outcomes of non-small-cell lung cancer (NSCLC) patients. In this study, we examined the influence of the distance from home to the hospital on patients with NSCLC who underwent surgical resection. METHODS: From 2006 to 2011, 607 consecutive patients with NSCLC who had undergone pulmonary resection were enrolled. The patients were divided into three groups according to the distance from their home to the hospital: 0 < 10, 10-30 and >30 km. We analysed the short-term and long-term outcomes according to the group. RESULTS: Two hundred and ninety-six patients lived less than 10 km from the hospital, 111 patients lived 10-30 km and 200 patients lived more than 30 km. There were no differences in the demographics, including age, European Cooperative Oncology Group performance status, histological type, surgical procedure and pathological stage, between the three groups. The mean postoperative hospital stay was as follows: 13.9 days in the <10 km group, 13.3 days in the 10-30 km group and 14.3 days in the >30 km group (P = 0.04). There were no significant differences in the median length of follow-up (50, 47, 43 months, P = 0.24), disease-free survival (DFS) (5-year DFS, 68.1, 68.2 and 70.1%, P = 0.89) or overall survival (OS) (5-year OS, 80.6, 78.8 and 79.4%, P = 0.99) between the three groups. CONCLUSIONS: The distance between home and the hospital was not found to influence the long-term outcomes of the patients with surgically resected NSCLC. Therefore, the travel distance should not represent a contraindication to surgical resection and postoperative therapy for NSCLC. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
246. SPH study of rapid landslides of cut slopes.
- Author
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Xuzhen He and Dongfang Liang
- Abstract
The article discusses research which examined the smoothed particle hydrodynamics (SPH) of rapid landslides of cut slopes. Topics discussed include a description of the SPH as a particle-based Lagrangian method represented by a large number of discrete particles, physical model for cut slope landslides and application to Fei Tsui landslide which happened in Hong Kong on August 13, 1995.
- Published
- 2015
247. A Microscopic Simulation Model of Roundabout Entry Operations
- Author
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Tan, Jian-an and Brilon, Werner, editor
- Published
- 1991
- Full Text
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248. Macroplastic Debris Transfer in Rivers: A Travel Distance Approach
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D. Mark Powell, Michael J. Whelan, and Robert Newbould
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Hydrology ,Flux ,Replicate ,Vegetation ,tracer ,Trap (plumbing) ,Environmental technology. Sanitary engineering ,Debris ,Displacement (vector) ,macroplastic ,travel distance ,plastic ,transport ,Litter ,Spatial ecology ,pollution ,Environmental science ,TD1-1066 - Abstract
Plastic accumulation in the marine environment is a major concern given the harmful effects and longevity of plastics at sea. Although rivers are likely to significantly contribute to the flux of plastic to marine systems, the behaviour of plastic debris in fluvial systems remains poorly understood and estimates of riverine plastic flux derived from field measurements and modelling efforts are highly uncertain. This paper presents a new probabilistic model of plastic transport in rivers which describes the main processes controlling plastic displacement and which predicts the statistical distribution of travel distances for individual items of buoyant macroplastic debris. Macroplastic transport is controlled by retention in temporary stores (or traps) created by vegetation, bank roughness elements and other obstacles. The behaviour of these traps is represented in the model via a series of Bernoulli trials conducted in a Monte Carlo simulation framework. The model was applied to a tracer experiment in a small 1.1 km river reach. Three replicates were used for calibration and three for validation. For each replicate, 90 closed air-filled polyethylene terephthalate (PET) bottles were introduced at the upstream end of the reach and the location of each bottle was recorded after 24 h. Bottles were chosen as “model” macroplastic litter items given their high usage and littering rate. Travel distances were low. The average and maximum distances travelled over 24 h were 231 m and 1.1 km, respectively. They were also variable. The coefficient of variation of travel distances was 0.94. Spatial patterns were controlled by the location and characteristics of discrete traps. The model was able to describe the observed travel distance distributions reasonably well, suggesting that modelling plastic behaviour in longer reaches and even whole catchments using a stochastic travel distance approach is feasible. The approach has the potential to improve estimates of river plastic flux, although significant knowledge gaps remain (e.g., the rate and location of plastic supply to river systems, the transport behaviours of different types of plastic debris and trap effectiveness in different types of river system, season, and discharge).
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- 2021
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249. Overcoming a travel burden to high-volume centers for treatment of retroperitoneal sarcomas is associated with improved survival
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Mohamed A. Adam, Robin Schmitz, and Dan G. Blazer
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Male ,medicine.medical_specialty ,Hospitals, Low-Volume ,Travel distance ,Retroperitoneal sarcomas ,Databases, Factual ,Survival ,medicine.medical_treatment ,lcsh:Surgery ,Improved survival ,RPS ,Patient Readmission ,lcsh:RC254-282 ,Disease-Free Survival ,Health Services Accessibility ,Resection ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,North Carolina ,Humans ,030212 general & internal medicine ,Hospital Mortality ,Retroperitoneal Neoplasms ,Aged ,Retrospective Studies ,Travel ,business.industry ,Research ,Cancer ,Sarcoma ,lcsh:RD1-811 ,Length of Stay ,Middle Aged ,medicine.disease ,Prognosis ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Treatment characteristics ,Radiation therapy ,Oncology ,Quartile ,030220 oncology & carcinogenesis ,Cohort ,Surgery ,Female ,Volume outcomes ,business ,Hospitals, High-Volume - Abstract
Background Guidelines recommend treatment of retroperitoneal sarcomas (RPS) at high-volume centers. However, high-volume centers may not be accessible locally. This national study compared outcomes of RPS resection between local low-volume centers and more distant high-volume centers. Methods Patients treated for RPS were identified from the National Cancer Database (1998–2012). Travel distance and annual hospital volume were divided into quartiles. Two groups were identified: (1) short travel to low-volume hospitals (ST/LV), (2) long travel to high-volume hospitals (LT/HV). Outcomes were adjusted for clinical, tumor, and treatment characteristics. Results Two thousand five hundred ninety-nine patients met the inclusion criteria. The LT/HV cohort was younger and more often white (p p p = 0.003). Thirty-day mortality was significantly lower in the LT/HV group (1.2% vs. 2.8%, p = 0.0026). Five-year survival was better among the LT/HV group (63% vs. 53%, p p = 0.0009). Conclusions This national study suggests that traveling to high-volume centers for the treatment of RPS confers a significant short-term and long-term survival advantage, supporting centralized care for RPS.
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- 2019
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250. Topography And Geology Effects On Travel Distances Of Natural Terrain Landslides: Evidence From A Large Multi-Temporal Landslide Inventory in Hong Kong
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Gao, Liang, Zhang, Limin, Chen, Hongxin, Fei, K., Hong, Yang, Gao, Liang, Zhang, Limin, Chen, Hongxin, Fei, K., and Hong, Yang
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Landslides pose threats to the safety and property of people living in mountainous areas like Hong Kong. Dependence of landslide travel distance on initial conditions and travel routes has broad implications for assessing the landslide risks. In this study, the controlling topographic and geologic factors for travel distances of open hillslope landslides and channelized debris flows are examined based on the Enhanced Natural Terrain Landslide Inventory (ENTLI) in Hong Kong with 11,622 records during the period of 1984–2013. The mean values of the horizontal travel distances of open hillslope landslides and channelized debris flows are 24.1 and 86.3 m, respectively. Correlations combining horizontal travel distances, volumes and fall heights of open hillslope landslides have been derived. The horizontal travel distances (L) and fall heights (H) are closely related for both types of landslides. The use of the L/H ratio alone as a representation of natural terrain landslide mobility is not suggested. Because of the entrainment of loose materials, the travel distances of channelized debris flows are enlarged significantly on colluvium lands (with mean value of 142.6 m), compared with those on weathered mantles (with mean value of 74.2 m). © 2021
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- 2021
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