VRP with Interdependent Time Windows — A Case Study for the Austrian Red Cross Blood Program

2003 ◽  
pp. 156-161 ◽  
Author(s):  
Karl Doerner ◽  
Manfred Gronalt ◽  
Richard F. Hartl ◽  
Marc Reimann ◽  
Kerstin Zisser
Keyword(s):  
Time Windows ◽  
Red Cross

Optimizing Ambulance Paths: Case Study of Red Cross Tripoli Branch

2020 ◽  
Author(s):  
Elissa Rafka ◽  
Nadia Baroudi ◽  
Samer El-Zahab ◽  
Nabil Semaan ◽  
Abobakr Al-Sakkaf
Keyword(s):  
Red Cross

scholarly journals Impacts of Spatial Heterogeneity and Temporal Non-Stationarity on Intensity-Duration-Frequency Estimates—A Case Study in a Mountainous California-Nevada Watershed

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1296 ◽  
Author(s):  
Huiying Ren ◽  
Z. Jason Hou ◽  
Mark Wigmosta ◽  
Ying Liu ◽  
L. Ruby Leung
Keyword(s):  
High Resolution ◽  
Spatial Heterogeneity ◽  
Time Windows ◽  
Exceedance Probability ◽  
Extreme Precipitation Events ◽  
Climate Simulations ◽  
Engineering Standards ◽  
Intensity Duration Frequency ◽  
Using Data

Changes in extreme precipitation events may require revisions of civil engineering standards to prevent water infrastructures from performing below the designated guidelines. Climate change may invalidate the intensity-duration-frequency (IDF) computation that is based on the assumption of data stationarity. Efforts in evaluating non-stationarity in the annual maxima series are inadequate, mostly due to the lack of long data records and convenient methods for detecting trends in the higher moments. In this study, using downscaled high resolution climate simulations of the historical and future periods under different carbon emission scenarios, we tested two solutions to obtain reliable IDFs under non-stationarity: (1) identify quasi-stationary time windows from the time series of interest to compute the IDF curves using data for the corresponding time windows; (2) introduce a parameter representing the trend in the means of the extreme value distributions. Focusing on a mountainous site, the Walker Watershed, the spatial heterogeneity and variability of IDFs or extremes are evaluated, particularly in terms of the terrain and elevation impacts. We compared observations-based IDFs that use the stationarity assumption with the two approaches that consider non-stationarity. The IDFs directly estimated based on the traditional stationarity assumption may underestimate the 100-year 24-h events by 10% to 60% towards the end of the century at most grids, resulting in significant under-designing of the engineering infrastructure at the study site. Strong spatial heterogeneity and variability in the IDF estimates suggest a preference for using high resolution simulation data for the reliable estimation of exceedance probability over data from sparsely distributed weather stations. Discrepancies among the three IDFs analyses due to non-stationarity are comparable to the spatial variability of the IDFs, underscoring a need to use an ensemble of non-stationary approaches to achieve unbiased and comprehensive IDF estimates.

scholarly journals Location Routing Problem with Consideration of CO2 Emissions Cost: A Case Study

2020 ◽  
Vol 21 (2) ◽  
pp. 225-234
Author(s):  
Ananda Noor Sholichah ◽  
Y Yuniaristanto ◽  
I Wayan Suletra
Keyword(s):  
Co2 Emissions ◽  
Time Windows ◽  
Optimal Solution ◽  
Mixed Integer ◽  
Distribution Centers ◽  
Location Routing Problem ◽  
Routing Problem ◽  
Location Routing ◽  
Study Results

Location and routing are the main critical problems investigated in a logistic. Location-Routing Problem (LRP) involves determining the location of facilities and vehicle routes to supply customer's demands. Determination of depots as distribution centers is one of the problems in LRP.  In LRP, carbon emissions need to be considered because these problems cause global warming and climate change. In this paper, a new mathematical model for LRP considering CO2 emissions minimization is proposed. This study developed a new  Mixed Integer Linear Programming (MILP)  model for LRP with time windows and considered the environmental impacts.  Finally, a case study was conducted in the province of Central Java, Indonesia. In this case study, there are three depot candidates. The study results indicated that using this method in existing conditions and constraints provides a more optimal solution than the company's actual route. A sensitivity analysis was also carried out in this case study.

scholarly journals In/visible conflicts: NGOs and the visual politics of humanitarian photography

2017 ◽  
Vol 39 (8) ◽  
pp. 1178-1193 ◽  
Author(s):  
Lina Dencik ◽  
Stuart Allan
Keyword(s):  
News Media ◽  
Red Cross ◽  
Digital Imagery ◽  
Structured Interviews ◽  
Visual Politics ◽  
Visual Boundaries ◽  
Save The Children ◽  
Visual Coverage

This article examines the diverse factors shaping the involvement of non-governmental organisation (NGO) with humanitarian photography, paying particular attention to co-operative relationships with photojournalists intended to facilitate the generation of visual coverage of crises otherwise marginalised, or ignored altogether, in mainstream news media. The analysis is primarily based on a case study drawing upon 26 semi-structured interviews with NGO personnel (International Red Cross/Red Crescent Movement, Oxfam and Save the Children) and photojournalists conducted over 2014–2016, securing original insights into the epistemic terms upon which NGOs have sought to produce, frame and distribute imagery from recurrently disregarded crisis zones. In this way, the article pinpoints how the uses of digital imagery being negotiated by NGOs elucidate the changing, stratified geopolitics of visibility demarcating the visual boundaries of newsworthiness.

scholarly journals Capacity Analysis for Approach Channels Shared by LNG Carriers

2020 ◽  
Vol 8 (9) ◽  
pp. 697
Author(s):  
Xiang Gao ◽  
Linying Chen ◽  
Pengfei Chen ◽  
Yu Luo ◽  
Junmin Mou
Keyword(s):  
Traffic Management ◽  
Time Windows ◽  
Management Strategies ◽  
Capacity Analysis ◽  
Behavioral Characteristics ◽  
Traffic Capacity ◽  
Approach Channel ◽  
General Cargo ◽  
The Impact

The transport of liquefied natural gas (LNG) has significant impact on traffic capacity of waterways, especially the approach channels shared by LNG carriers and other types of ships (general cargo ships, container ships, etc.). Few studies take the behavioral characteristics of LNG carriers and their impacts into consideration. In this paper, we propose a framework for capacity analysis of shared approach channels based on the spatial–temporal consumption method. It consists of three modules: (1) the tide module predicts the tidal height and tidal time for identifying the time windows for LNG carriers; (2) the spatial–temporal consumption module is introduced to calculate the capacity of approach channels; (3) the LNG carrier navigation module is for analyzing the characteristics of LNG carriers and the impact on the capacity of approach channels. A spatial–temporal indexed chart is designed to visualize the utilization of the spatial–temporal resources. A case study on the approach channel of Yueqing Bay near the east coast of China is conducted to verify the effectiveness of the framework. The utilization rates of the approach channel and the impact of LNG carriers are presented using our method. The results of the case study indicate that the proposed traffic capacity analyzing framework can provide support for making traffic management strategies.

INTERNATIONAL HUMANITARIAN LAW FROM A FIELD PERSPECTIVE – CASE STUDY: NEPAL

2006 ◽  
Vol 9 ◽  
pp. 394-417 ◽  
Author(s):  
P.J.C. Schimmelpenninck van der Oije
Keyword(s):  
Armed Conflict ◽  
Humanitarian Aid ◽  
International Committee ◽  
Theory And Practice ◽  
Red Cross ◽  
International Humanitarian Law ◽  
Humanitarian Law ◽  
Link Theory ◽  
Field Perspective

AbstractWhat is it like to be working in the field with international humanitarian law during an armed conflict? In the article ‘International Humanitarian Law from a field perspective - case study: Nepal‘, the promotion of international humanitarian law is described through the eyes of a humanitarian aid worker. The author worked as a delegate for the International Committee of the Red Cross (ICRC) during the civil war in Nepal. International humanitarian law forms the legal basis of the ICRC's presence in Nepal, it's humanitarian activities and confidential interventions. Nepal and its conflict are introduced, as well as the warring parties and the Red Cross in Nepal. Various humanitarian activities and dilemma's are described. Through this article the YIHL seeks to link theory and practice, and focus on international humanitarian law from an operational perspective.

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