scholarly journals A heuristic approach applied to the fleet sizing problem for military ground vehicles

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dave C. Longhorn ◽  
John Dale Stobbs
Keyword(s):  
Large Scale ◽  
Geographic Region ◽  
Small Scale ◽  
Destination Node ◽  
Heuristic Solution ◽  
Content Type ◽  
Us Army ◽  
Fleet Sizing ◽  
Military Equipment ◽  
The Us

Purpose This paper aims to propose two solution approaches to determine the number of ground transport vehicles that are required to ensure the on-time delivery of military equipment between origin and destination node pairs in some geographic region, which is an important logistics problem at the US Transportation Command. Design/methodology/approach The author uses a mathematical program and a traditional heuristic to provide optimal and near-optimal solutions, respectively. The author also compares the approaches for random, small-scale problems to assess the quality and computational efficiency of the heuristic solution, and also uses the heuristic to solve a notional, large-scale problem typical of real problems. Findings This work helps analysts identify how many ground transport vehicles are needed to meet cargo delivery requirements in any military theater of operation. Research limitations/implications This research assumes all problem data is deterministic, so it does not capture variations in requirements or transit times between nodes. Practical implications This work provides prescriptive details to military analysts and decision-makers in a timely manner. Prior to this work, insights for this type of problem were generated using time-consuming simulation taking about a week and often involving trial-and-error. Originality/value This research provides new methods to solve an important logistics problem. The heuristic presented in this paper was recently used to provide operational insights about ground vehicle requirements to support a geographic combatant command and to inform decisions for railcar recapitalization within the US Army.

Societal discontent will increase in Bahrain

2021 ◽  
Keyword(s):  
Large Scale ◽  
Political Representation ◽  
Social Protest ◽  
Small Scale ◽  
Content Type ◽  
High Profile ◽  
Arab Uprisings ◽  
Base Level

Significance Although large-scale social protest in Bahrain has been cowed over the ten years since the ‘Arab uprisings’, small-scale demonstrations recur, reflecting a base level of discontent. Mobilising issues include economic pressures, limited political representation (especially of the Shia majority) and, most recently, ties with Israel. Impacts Despite protests, Israel’s and Bahrain’s respective ambassadors will keep up high-profile activity and statements. The authorities are likely to exaggerate the role of Iranian interference in order to deepen the Sunni-Shia divide. If Riyadh manages to extricate itself from the Yemen war, that could partly reduce the pressure on Manama.

scholarly journals Supply chain resilience in a developing country context: a case study on the interconnectedness of threats, strategies and outcomes

2017 ◽  
Vol 22 (6) ◽  
pp. 486-505 ◽  
Author(s):  
Benjamin Tukamuhabwa ◽  
Mark Stevenson ◽  
Jerry Busby
Keyword(s):  
Supply Chain ◽  
Developing Country ◽  
Large Scale ◽  
Empirical Studies ◽  
Small Scale ◽  
Supply Network ◽  
Catastrophic Events ◽  
Content Type ◽  
Supply Chain Resilience

Purpose In few prior empirical studies on supply chain resilience (SCRES), the focus has been on the developed world. Yet, organisations in developing countries constitute a significant part of global supply chains and have also experienced the disastrous effects of supply chain failures. The purpose of this paper is therefore to empirically investigate SCRES in a developing country context and to show that this also provides theoretical insights into the nature of what is meant by resilience. Design/methodology/approach Using a case study approach, a supply network of 20 manufacturing firms in Uganda is analysed based on a total of 45 interviews. Findings The perceived threats to SCRES in this context are mainly small-scale, chronic disruptive events rather than discrete, large-scale catastrophic events typically emphasised in the literature. The data reveal how threats of disruption, resilience strategies and outcomes are inter-related in complex, coupled and non-linear ways. These interrelationships are explained by the political, cultural and territorial embeddedness of the supply network in a developing country. Further, this embeddedness contributes to the phenomenon of supply chain risk migration, whereby an attempt to mitigate one threat produces another threat and/or shifts the threat to another point in the supply network. Practical implications Managers should be aware, for example, of potential risk migration from one threat to another when crafting strategies to build SCRES. Equally, the potential for risk migration across the supply network means managers should look at the supply chain holistically because actors along the chain are so interconnected. Originality/value The paper goes beyond the extant literature by highlighting how SCRES is not only about responding to specific, isolated threats but about the continuous management of risk migration. It demonstrates that resilience requires both an understanding of the interconnectedness of threats, strategies and outcomes and an understanding of the embeddedness of the supply network. Finally, this study’s focus on the context of a developing country reveals that resilience should be equally concerned both with smaller in scale, chronic disruptions and with occasional, large-scale catastrophic events.

scholarly journals Narratives of everyday resilience: lessons from an urban kampung community in Surabaya, Indonesia

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shirleyana ◽  
Scott Hawken ◽  
Riza Yosia Sunindijo ◽  
David Sanderson
Keyword(s):  
Inner City ◽  
Design Methodology ◽  
Large Scale ◽  
Small Scale ◽  
Content Type ◽  
Disadvantaged Communities ◽  
Political Network ◽  
Starting Point ◽  
Resilience Factors ◽  
Depth Interviews

Purpose This paper aims to discuss what people perceive as risks and resilience factors, and how they build everyday resilience. Design/methodology/approach The study focuses on Kampung (literally “village”) Plampitan, a neighbourhood in the inner-city part of Surabaya. The research used field observation, in-depth interviews and workshops during community meetings to collect data. Findings The results show how people respond to daily risks and find the support necessary to survive. The problems and risks revealed in the study include crime and economic difficulties, such as unemployment and insufficient income. Coping strategies identified are classified into place-based adaption, people-based network and political network. These strategies can serve as a starting point for local communities to assess their resilience and assist them in enhancing “everyday” resilience. Originality/value The paper argues that the concept of resilience must go beyond top-down approaches to disaster risk management and integrate bottom-up understanding from the perspective of local people, especially among marginal and disadvantaged communities. The paper develops the emerging and overlooked concept of “everyday resilience” and suggests that it is essential in surviving both “everyday” or small-scale chronic risks and large-scale disasters.

Burn Chamber Test of Ex Situ Thermal Impulse Sensors

2020 ◽  
Vol 74 (5) ◽  
pp. 515-524
Author(s):  
Benjamin R. Anderson ◽  
Natalie Gese ◽  
Ray Gunawidjaja ◽  
Hergen Eilers
Keyword(s):  
Research Laboratory ◽  
Large Scale ◽  
Current Method ◽  
Ex Situ ◽  
Small Scale ◽  
Average Temperature ◽  
Current Test ◽  
Oxide Precursor ◽  
The Us ◽  
Lab Test

Recently, we reported on a novel ex situ thermal impulse sensing technique (based on lanthanide-doped oxide precursor nanoparticles) for use in structural fire forensics and demonstrated its functionality in small-scale lab-based tests. As a next step we have now performed a large-scale lab test at the US Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) Fire Research Laboratory using a burn chamber with three sand burners. In this test we demonstrate our technique’s ability to determine the average temperature experienced by surfaces during the fire. While we successfully demonstrate our techniques accuracy, we also discover several previously unknown vulnerabilities. Namely, we find that: (1) our current method of embedding sensors in paint results in our sensor particles being difficult to recover (due to a large quantity of debris), (2) the current test panels have poor survivability, (3) debris from the fire tests interferes with excitation of dopant Dy ions (limiting our sensors’ functionality), and (4) dispersal in paint results in suppression of the (metastable)tetragonal-to-monoclinic phase transition of ZrO2. To overcome these vulnerabilities we are evaluating new panel materials, paints, and lanthanide-dopants.

Even gradual quantitative tightening raises GDP risks

2019 ◽  
Keyword(s):  
Euro Area ◽  
Commercial Banks ◽  
Large Scale ◽  
Sales Tax ◽  
Quantitative Easing ◽  
Content Type ◽  
Balance Sheets ◽  
Liquidity Provision ◽  
The Us ◽  
Repurchase Agreements

Subject Quantitative easing and GDP. Significance The US Federal Reserve (Fed), Bank of Japan (BoJ) and ECB have all conducted quantitative easing (QE) programmes since 2008, purchasing assets from commercial banks on a large scale and without predefined repurchase agreements. These purchases have swollen the balance sheets of the three largest central banks and provided commercial banks with large liquidity buffers. Impacts The pace of the Fed withdrawing liquidity may slow; if US-China conflict worsens or another shock occurs, the Fed may consider reversing. In the euro-area, there are no new liquidity provisions, at a time when German GDP is weakening and Brexit threatens EU growth. New liquidity-provision plans may be hard for the euro-area to agree; if this is off the table, so are liquidity-withdrawing measures. The BoJ may stop scaling back its bond and ETF holdings if markets suffer; the upcoming sales tax rise will also hit spending.

Improving unsustainable livelihood through marketing interventions

2014 ◽  
Vol 33 (2) ◽  
pp. 107-118
Author(s):  
Subhojit Banerjee ◽  
Anuj Sharma
Keyword(s):  
Large Scale ◽  
Economic Status ◽  
Working Hours ◽  
Small Scale ◽  
Urban District ◽  
Content Type ◽  
Cultural Aspects ◽  
Critical Issues ◽  
Secondary Survey ◽  
Initial Survey

Purpose – The purpose of this paper is to describe an initiative to improve the daily earnings of a rickshaw puller by training them to retail branded FMCG products based on a “bulk buying retail selling” model. The paper is based on the findings of a survey conducted 112 rickshaw pullers in a semi-urban district of eastern India. It also dwells on the business of rickshaw pulling and the socio-economic status of the rickshaw puller. Critical issues related to the sustainability and the future of such interventions on a large scale has also been discussed. Design/methodology/approach – An initial survey of 112 rickshaw pullers was done using a structured schedule that captured data related to age, literacy level, earnings per day, ownership and working hours. Some additional aspects related to socio-cultural aspects were also collected as an unstructured interview. A secondary survey from 107 respondents representing different sections of the society who frequently use rickshaw as a means for transport was also done to take an opinion on intervention issues. Findings – Findings of the paper suggest that rickshaw pullers have three distinct strategic advantages of literacy, access and mobility, which makes them a potent resource for marketing intervention. Research limitations/implications – The paper reflects on a systematic intervention plan that can change the socio-economic pattern of rickshaw pulling. A possibility of contributory roles from garage owners and wholesellers is also explored. The proposed scheme may also bail-out the small-scale industries and handicraft businesses in villages. Major limitations of the research are long-term sustainability and large-scale implementation of the proposed model. Practical implications – The paper can act as a manual for small entrepreneurs and NGOs working in the social-development area for implementing schemes targeted at rickshaw pullers. The paper also has valuable points for the consideration of policy makers. Originality/value – The research has given insights in to the livelihood aspect of one of the most essential but neglected modes of transport, i.e. rickshaw pulling. The paper has also identified key strengths that rickshaw pulling has, which otherwise is considered purely physical and low-skilled job.

ECB sovereign QE could support inflation trends

2015 ◽  
Keyword(s):  
Euro Area ◽  
Risk Sharing ◽  
Large Scale ◽  
The United States ◽  
Wealth Effects ◽  
Medium Term ◽  
Content Type ◽  
European Institutions ◽  
The Us ◽  
Asset Backed Securities

Significance The programme expands existing purchases of asset-backed securities and covered bonds with large-scale buying of bonds issued by euro-area governments, agencies and European institutions. Purchases will amount to a combined total of 60 billion euros (69 billion dollars) per month, starting in March. They will continue until at least September 2016 -- or until there is progress towards the central bank's medium-term inflation goal. Impacts The larger than expected size of the programme will be achievable thanks to partial risk sharing among national central banks. Wealth effects will be smaller than in the United States and United Kingdom, as euro-area capital markets are less deep. The QE programme will amount to 12% of euro-area GDP, while the US programme was larger, at 25% of GDP.

Asteroid mining becomes a serious proposition

2018 ◽  
Keyword(s):  
Large Scale ◽  
Mining Industry ◽  
Resource Depletion ◽  
Content Type ◽  
China Academy ◽  
Viable Solution ◽  
The Us ◽  
Legal Foundations ◽  
Legal Frameworks

Subject Asteroid mining. Significance The US firm Planetary Resources in April completed successful tests in orbit of technology it plans to use to prospect for natural resources on asteroids from 2020. Separately, the China Academy of Launch Vehicle Technology late last year announced long-term plans for large-scale asteroid mining. Meanwhile, US legislators have begun laying the legal foundations for a space mining industry. Significant technological challenges remain, but key technologies have already been demonstrated, making the industry a serious prospect. Impacts An investment bubble could follow dramatic early successes or technological breakthroughs. There may be international tension over ownership or priority of access unless new international legal frameworks are agreed in advance. Asteroid mining will not be a viable solution to terrestrial resource depletion for the foreseeable future.

scholarly journals Hard paths, soft paths or no paths? Cross-cultural perceptions of water solutions

2014 ◽  
Vol 18 (1) ◽  
pp. 109-120 ◽  
Author(s):  
A. Wutich ◽  
A. C. White ◽  
D. D. White ◽  
K. L. Larson ◽  
A. Brewis ◽  
...  
Keyword(s):  
Water Scarcity ◽  
Large Scale ◽  
Resource Constraints ◽  
Small Scale ◽  
Cultural Perceptions ◽  
Water Solutions ◽  
Development Status ◽  
The Social ◽  
The Us ◽  
Water Scarce

Abstract. In this study, we examine how development status and water scarcity shape people's perceptions of "hard path" and "soft path" water solutions. Based on ethnographic research conducted in four semi-rural/peri-urban sites (in Bolivia, Fiji, New Zealand, and the US), we use content analysis to conduct statistical and thematic comparisons of interview data. Our results indicate clear differences associated with development status and, to a lesser extent, water scarcity. People in the two less developed sites were more likely to suggest hard path solutions, less likely to suggest soft path solutions, and more likely to see no path to solutions than people in the more developed sites. Thematically, people in the two less developed sites envisioned solutions that involve small-scale water infrastructure and decentralized, community-based solutions, while people in the more developed sites envisioned solutions that involve large-scale infrastructure and centralized, regulatory water solutions. People in the two water-scarce sites were less likely to suggest soft path solutions and more likely to see no path to solutions (but no more likely to suggest hard path solutions) than people in the water-rich sites. Thematically, people in the two water-rich sites seemed to perceive a wider array of unrealized potential soft path solutions than those in the water-scarce sites. On balance, our findings are encouraging in that they indicate that people are receptive to soft path solutions in a range of sites, even those with limited financial or water resources. Our research points to the need for more studies that investigate the social feasibility of soft path water solutions, particularly in sites with significant financial and natural resource constraints.

Reckoning with the barriers to Lean implementation in Northern Indian SMEs using the AHP-TOPSIS approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sachin Saini ◽  
Doordarshi Singh
Keyword(s):  
Lean Manufacturing ◽  
Large Scale ◽  
Service Sector ◽  
Extensive Study ◽  
Small Scale ◽  
Successful Implementation ◽  
Topsis Method ◽  
Lean Implementation ◽  
Content Type ◽  
The People

Purpose The purpose of this study is to recognize critical barriers for Lean manufacturing practices implementation in small and medium enterprises (SMEs) focusing in the context of a developing economy. The advancement of SMEs is of utmost important for a surge in exports while competing with other countries and these barriers have to be given due importance as they play a major role in stalling the overall development of SMEs. Design/methodology/approach In this present investigation, 26 barriers to Lean implementation in SMEs have been identified after an extensive study of the literature available on the subject. After that, the influential barriers were investigated through the Analytical hierarchy process-Technique of order preference by similarity to ideal solution (AHP-TOPSIS) method using priority weightage given to them by different experts in their industries. The ranking given to the barriers is based on the AHP-TOPSIS method and has been validated by the sensitivity analysis. Findings The investigation reveals that for the successful implementation of Lean manufacturing practices, the will of the management, individual will power and contribution of the people matter a lot apart from other barriers such as flexibility, expertise of the people, resources and resistance offered by the people to new programs. The solutions for overcoming these barriers are also provided in this study and a model has been suggested for the same. Research limitations/implications This work was devoted to the evaluation of obstacles in the introduction of Lean practices and prioritizing them. But it was limited to the medium- and small-scale organizations located in Northern India. Further studies can expand the scope to the large-scale units in the field. Moreover, the scope of this study was confined to the manufacturing sector. Future studies can extend it to the non-manufacturing environments such as the service sector, health care, etc. This investigation was based on the judgments of industry experts and academicians. Another approach such as Viekriterijumsko kompromisno rangiranje can be used for future investigations. Originality/value This study is significant when keeping in mind the contribution of SMEs to a country’s economy, especially in the Indian context.

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