scholarly journals Three-robot minimax travel-distance optimal formation

Author(s):  
Zhenchao Jia ◽  
Hongbin Ma ◽  
Chenguang Yang ◽  
Meiling Wang
Keyword(s):  
Author(s):  
Karline R. L. Janmaat ◽  
Simone D. Ban ◽  
Roger Mundry
Keyword(s):  

2020 ◽  
Vol 3 (1) ◽  
pp. 56
Author(s):  
Arkadiusz Gendek ◽  
Monika Aniszewska ◽  
Witold Zychowicz ◽  
Tadeusz Moskalik ◽  
Jan Malaťák ◽  
...  

The aim of the research was to verify the impact of selected parameters on the efficiency and organization of chipper operations. The paper analyzes chipping operations in Polish forests with a focus on work site location, overnight chipper location, chipper workload per site, fuel consumption, and work shift duration, as all of these factors may affect operating efficiency. The mean chipper travel distance between sites during a shift ranged from 4.74 km to 9.5 km (chippers moved on average every other day). The mean work shift duration was 12.4 h. At the end of a shift, the chippers traveled on average from 4.2 km to 6.3 km to an overnight location. At the beginning of a workday, the chippers were dispatched to sites at a distance of 2.5 km to 4.0 km. The average fuel consumption of the forwarder-mounted chippers was 16 L/h and that of the truck-mounted chipper was 7.7 L/h. It was found that the following actions have a decisive influence on the effectiveness of the operation of the chippers: determination of the size of individual tasks and the deployment of successive forest areas, indication of the proper location of the machine base, and the method of accessing the forest area.


2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
C Pena-Gil ◽  
G Prada-Ramallal ◽  
V Gonzalez-Salvado ◽  
M Sestayo-Fernandez ◽  
O Lado-Baleato ◽  
...  

Abstract Background Cardiac rehabilitation programs (CRP) are strongly recommended after acute coronary syndrome (ACS) or coronary revascularization (PCI or CABG), but actual offer and participation among elderly patients (age ≥65) have not been well characterised. Purpose To analyse current offer and participation rates in different European CRP in elderly patients. Methods Data from elderly patients recruited for CRP, after ACS, PCI or CABG, in centres from seven European countries participating in the EU-CaRE study (NTR5306), were analysed. Results 3471 patients were screened, of whom 80.9% (n=2806) were offered participation and 68.0% of these (n=1908) agreed to participate in a CRP. Outpatient CRP were offered to 73–92% of screened patients. Among reasons for not offering the program were contraindications and geographical conditions. Patients who were not offered were mainly older, with worse cardiovascular risk profile and comorbidities. In the multivariable analysis main variables related with offering in Copenhagen were age (OR=0.92, CI95% 0.87–0.98), gender (male, OR=2.42, CI95% 1.10–5.31) and previous CABG (OR=0.12, CI95% 0.04–0.36). In Bern, age (OR=0.89, CI95% 0.85–0.93), ACS (OR=1.85, CI95% 1.01–3.54) and smoking status (OR=0.47, CI95% 0.24–0.93). In Zwolle, age (OR=0.89, CI95% 0.91–0.97), CABG (OR=4.34, CI95% 1.37->10), smoking status (OR=0.23, CI95% 0.06–1.11), diabetes mellitus (OR=0.33, CI95% 0.13–0.91) and comorbidities (i.e. obstructive pulmonary disease). In Santiago, age (OR=0.83, CI95% 0.73–0.91), index event PCI (OR=14.21, CI95% 3.68->10) and rheumatoid arthritis. The ratio of participation among those who were offered the program varied from 46% to 94% (46% to 67% in outpatients' programs). Main reasons for not participating were patients considered that it was not useful (366, 10.5%), travel distance (205, 5.8%), transport difficulties (134, 3.8%) and exercises on own initiative (70, 2.0%). In a center-specific analysis we performed predictive models of participation. In Copenhagen (AUC=0.69) the main variables predicting participation were age (OR=0.99, CI95% 0.96–1.03), not living alone (OR=1.53, CI95% 0.96–2.42), CABG (OR=2.69, CI95% 1.51–4.80) and comorbidities. In Bern (AUC=0.81), age (OR=0.92, CI95% 0.89–0.95), ACS (OR=3.99, CI95% 2.56–6.20) and peripheral artery disease. In Zwolle (AUC=0.71), age (OR=0.94, CI95% 0.91–0.98), employment status (OR=0.28, CI95% 0.13–0.60), CABG (OR=3.62, CI95% 2.28–5.77) and previous ACS (OR=0.58, CI95% 0.35–0.95). In Santiago (AUC=0.85), age (OR=0.95, CI95% 0.90–0.99), rural habitat (OR=0.58, CI95% 0.32–1.04), valvulopathy (OR=0.33, CI95% 0.14–0.79) and the index intervention PCI. Conclusions Knowing reasons (travel distance, usefulness of the program understood by patient) and variables (age, living alone or in rural area) that determine if CRP is offered and whether or not patients participate will help redesign CRP to better adapt to actual needs of an elderly European population. Acknowledgement/Funding This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 634439


2016 ◽  
Vol 88 (3) ◽  
pp. 526-532 ◽  
Author(s):  
Veronika Simova ◽  
Eva Voslarova ◽  
Vladimir Vecerek ◽  
Annamaria Passantino ◽  
Iveta Bedanova

2021 ◽  
Author(s):  
Laleh Jalilian ◽  
Irene Wu ◽  
Jakun Ing ◽  
Xuezhi Dong ◽  
George Pan ◽  
...  

BACKGROUND An increasing number of patients require outpatient and interventional pain management. To help meet the rising demand for anesthesia pain subspecialty care in rural and metropolitan areas, healthcare providers have utilized telemedicine for pain management of both interventional and chronic pain patients. OBJECTIVE This study describes telemedicine implementation for pain management at an academic pain division in a large metropolitan area. The study estimates patient cost savings from telemedicine, before and after the California COVID-19 "Safer at Home" directive, and patient satisfaction with telemedicine for pain management care. METHODS This was a retrospective, observational case series study of telemedicine use in a pain division at an urban academic medical center. From August 2019 to June 2020, we evaluated 1,398 patients and conducted 2,948 video visits for remote pain management care. We utilize publicly available IRS Statistics of Income data to estimate hourly earnings by zip code in order to estimate patient cost savings. We estimate median travel time, travel distance, direct cost of travel, and time-based opportunity savings and report patient satisfaction scores. RESULTS Telemedicine patients avoided an estimated median roundtrip driving distance of 26 miles and a median travel time of 69 minutes during afternoon traffic conditions. Within sample, the median hourly earnings was $28/hr. Patients saved a median of $22 on gas and parking and a total of $52 per telemedicine visit based on estimated hourly earnings and travel time. Patients evaluated serially with telemedicine for medication management saved a median of $156 over three visits. 91% of patients surveyed (n = 313) were satisfied with their telemedicine experience. CONCLUSIONS Telemedicine use for pain management reduced travel distance, travel time, and travel and time-based opportunity costs for pain patients. We achieved the successful implementation of telemedicine across a pain division in an urban academic medical center with high patient satisfaction and patient cost savings.


2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Aaron M. Tarnasky ◽  
Lindsey A. Olivere ◽  
Leila Ledbetter ◽  
Elisabeth T. Tracy

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