scholarly journals LESSONS FROM DEPLOYING LARGE-SCALE SOLAR ELECTRIFICATION IN BANGLADESH: CAN THE LAST MILE BECOME THE FIRST?

2019 ◽  
Author(s):  
GEORG HEINEMANN ◽  
RALUCA DUMITRESCU ◽  
CHRISTIAN VON HIRSCHHAUSEN ◽  
NOARA KEBIR ◽  
DANIEL PHILIPP
Keyword(s):  
Large Scale ◽  
Last Mile

Efficient Schedule of Energy-Constrained UAV Using Crowdsourced Buses in Last-Mile Parcel Delivery

2021 ◽  
Vol 5 (1) ◽  
pp. 1-23
Author(s):  
Yan Pan ◽  
Shining Li ◽  
Qianwu Chen ◽  
Nan Zhang ◽  
Tao Cheng ◽  
...  
Keyword(s):  
Traffic Congestion ◽  
Large Scale ◽  
Load Capacity ◽  
Scheduling Algorithm ◽  
Cost Effective ◽  
Promising Alternative ◽  
Logistics Industry ◽  
Last Mile ◽  
Delivery Scheduling ◽  
Schedule Approach

Stimulated by the dramatical service demand in the logistics industry, logistics trucks employed in last-mile parcel delivery bring critical public concerns, such as heavy cost burden, traffic congestion and air pollution. Unmanned Aerial Vehicles (UAVs) are a promising alternative tool in last-mile delivery, which is however limited by insufficient flight range and load capacity. This paper presents an innovative energy-limited logistics UAV schedule approach using crowdsourced buses. Specifically, when one UAV delivers a parcel, it first lands on a crowdsourced social bus to parcel destination, gets recharged by the wireless recharger deployed on the bus, and then flies from the bus to the parcel destination. This novel approach not only increases the delivery range and load capacity of battery-limited UAVs, but is also much more cost-effective and environment-friendly than traditional methods. New challenges therefore emerge as the buses with spatiotemporal mobility become the bottleneck during delivery. By landing on buses, an Energy-Neutral Flight Principle and a delivery scheduling algorithm are proposed for the UAVs. Using the Energy-Neutral Flight Principle, each UAV can plan a flying path without depleting energy given buses with uncertain velocities. Besides, the delivery scheduling algorithm optimizes the delivery time and number of delivered parcels given warehouse location, logistics UAVs, parcel locations and buses. Comprehensive evaluations using a large-scale bus dataset demonstrate the superiority of the innovative logistics UAV schedule approach.

scholarly journals Planning the use of helicopters in the last mile distribution process in catastrophes

2021 ◽  
Vol 28 (4) ◽  
Author(s):  
Iran Rosa Xavier ◽  
Renata Albergaria de Mello Bandeira ◽  
Leandro de Oliveira Silva ◽  
Adriano de Paula Fontainhas Bandeira ◽  
Vânia Barcellos Gouvêa Campos ◽  
...  
Keyword(s):  
Disaster Response ◽  
Large Scale ◽  
Transportation Systems ◽  
Air Transport ◽  
Earthquake Response ◽  
Multiple Products ◽  
Last Mile ◽  
Hypothetical Scenario ◽  
Distribution Process ◽  
Key Steps

Abstract: The shortage of funding, the challenging assessment of aid needs, and the lack of transportation systems for the rescue and care of victims represent major constraints to disaster response operations. In order to improve logistical performance in these conditions, including remote and large areas, this paper proposes a formal mathematical model to assist air transport planning, using helicopters, for large-scale disasters, considering multiple deposit systems, multiples vehicles and multiple products, implemented in AIMMS to evaluate its performance. To achieve the objectives, a literature review is conducted to understand the ways in which helicopters are used in aid operations and to identify key steps in decision making and modeling processes. In the end, a hypothetical scenario is created with similar characteristics from the records of earthquake response operations that hit Haiti in 2010 for consolidation and validation of the procedure.

scholarly journals Reducing Child Mortality in the Last Mile: Experimental Evidence on Community Health Promoters in Uganda

2019 ◽  
Vol 11 (3) ◽  
pp. 155-192 ◽  
Author(s):  
Martina Björkman Nyqvist ◽  
Andrea Guariso ◽  
Jakob Svensson ◽  
David Yanagizawa-Drott
Keyword(s):  
Child Mortality ◽  
Large Scale ◽  
Care Delivery ◽  
Health Impact ◽  
Medical Advice ◽  
Randomized Evaluation ◽  
Novel Approach ◽  
Last Mile ◽  
Health Products ◽  
Sales Agent

The delivery of basic health products and services remains abysmal in many parts of the world where child mortality is high. This paper shows the results from a large-scale randomized evaluation of a novel approach to health care delivery. In randomly selected villages, a sales agent was locally recruited and incentivized to conduct home visits, educate households on essential health behaviors, provide medical advice and referrals, and sell preventive and curative health products. Results after 3 years show substantial health impact: under 5-years child mortality was reduced by 27 percent at an estimated average cost of $68 per life-year saved. (JEL I12, I18, J13, O15, O18)

scholarly journals Improving Last-Mile Service Delivery Using Phone-Based Monitoring

2021 ◽  
Vol 13 (2) ◽  
pp. 52-82
Author(s):  
Karthik Muralidharan ◽  
Paul Niehaus ◽  
Sandip Sukhtankar ◽  
Jeffrey Weaver
Keyword(s):  
Service Delivery ◽  
Public Service ◽  
Program Implementation ◽  
Large Scale ◽  
Effective Means ◽  
Cost Effective ◽  
Percent Reduction ◽  
Last Mile ◽  
Scale Experiment ◽  
The Impact

Improving “ last-mile” public service delivery is a recurring challenge in developing countries. Could the widespread adoption of mobile phones provide a scalable, cost-effective means for improvement? We use a large-scale experiment to evaluate the impact of phone-based monitoring on a program that transferred nearly a billion dollars to 5.7 million Indian farmers. In randomly selected jurisdictions, officials were informed that program implementation would be measured via calls with beneficiaries. This led to a 7.8 percent reduction in the number of farmers who did not receive their transfers. The program was highly cost-effective, costing 3.6 cents for each additional dollar delivered. (JEL O13, O33, Q12, Q18)

scholarly journals Employing helicopters in the modelling of last mile distribution system in large-scale disasters

2019 ◽  
Vol 37 ◽  
pp. 306-313 ◽  
Author(s):  
Iran Rosa Xavier ◽  
Renata Albergaria de Mello Bandeira ◽  
Leandro de Oliveira Silva ◽  
Adriano de Paula Fontainhas Bandeira ◽  
Vânia Barcellos Gouvêa Campos
Keyword(s):  
Distribution System ◽  
Large Scale ◽  
Last Mile

scholarly journals A New Ant Colony-Based Methodology for Disaster Relief

Mathematics ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 518 ◽  
Author(s):  
José M. Ferrer ◽  
M. Teresa Ortuño ◽  
Gregorio Tirado
Keyword(s):  
Large Scale ◽  
Humanitarian Aid ◽  
Decision Support Tool ◽  
Ant Colony ◽  
Haiti Earthquake ◽  
Distribution Problem ◽  
Support Tool ◽  
Last Mile ◽  
Research Gap ◽  
High Uncertainty

Humanitarian logistics in response to large scale disasters entails decisions that must be taken urgently and under high uncertainty. In addition, the scarcity of available resources sometimes causes the involved organizations to suffer assaults while transporting the humanitarian aid. This paper addresses the last mile distribution problem that arises in such an insecure environment, in which vehicles are often forced to travel together forming convoys for security reasons. We develop an elaborated methodology based on Ant Colony Optimization that is applied to two case studies built from real disasters, namely the 2010 Haiti earthquake and the 2005 Niger famine. There are very few works in the literature dealing with problems in this context, and that is the research gap this paper tries to fill. Furthermore, the consideration of multiple criteria such as cost, time, equity, reliability, security or priority, is also an important contribution to the literature, in addition to the use of specialized ants and effective pheromones that are novel elements of the algorithm which could be exported to other similar problems. Computational results illustrate the efficiency of the new methodology, confirming it could be a good basis for a decision support tool for real operations.

Some comments about observations and image processing of comet 29P/Schwassmann-Wachmann 1

1999 ◽  
Vol 173 ◽  
pp. 243-248
Author(s):  
D. Kubáček ◽  
A. Galád ◽  
A. Pravda
Keyword(s):  
Image Processing ◽  
Large Scale ◽  
Harvard College ◽  
Oak Ridge ◽  
Large Scale Structures ◽  
Short Period Comet ◽  
Short Period ◽  
Scale Structures ◽  
Harvard College Observatory ◽  
Period Comet

AbstractUnusual short-period comet 29P/Schwassmann-Wachmann 1 inspired many observers to explain its unpredictable outbursts. In this paper large scale structures and features from the inner part of the coma in time periods around outbursts are studied. CCD images were taken at Whipple Observatory, Mt. Hopkins, in 1989 and at Astronomical Observatory, Modra, from 1995 to 1998. Photographic plates of the comet were taken at Harvard College Observatory, Oak Ridge, from 1974 to 1982. The latter were digitized at first to apply the same techniques of image processing for optimizing the visibility of features in the coma during outbursts. Outbursts and coma structures show various shapes.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Large-scale Motion of Solar Filaments

2000 ◽  
Vol 179 ◽  
pp. 205-208
Author(s):  
Pavel Ambrož ◽  
Alfred Schroll
Keyword(s):  
Magnetic Flux ◽  
Proper Motion ◽  
Time Scale ◽  
Large Scale ◽  
Accuracy Of Measurements ◽  
Solar Filaments ◽  
General Movement ◽  
Scale Motion ◽  
Velocity Scatter

AbstractPrecise measurements of heliographic position of solar filaments were used for determination of the proper motion of solar filaments on the time-scale of days. The filaments have a tendency to make a shaking or waving of the external structure and to make a general movement of whole filament body, coinciding with the transport of the magnetic flux in the photosphere. The velocity scatter of individual measured points is about one order higher than the accuracy of measurements.

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