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Der Einsatz Mathematischer Optimierung für Fragestellungen im Bergbau – aktuelle Fallstudien

Jörg Benndorf

BHM Berg- und Hüttenmännische Monatshefte > 2017 > 162 > 10 > 447-452

Die Mathematische Optimierung bzw. das Operations-Research bieten ein großes Repertoire an Methoden, die in der Assistenz zur Entscheidungsfindung komplexer Probleme unterstützen können. Obwohl schon seit den 70er-Jahren in einzelnen Fallstudien der Rohstoffgewinnung dokumentiert, kommt diese Technik in der heutigen Praxis bzw. in der Lehre im deutschsprachigen Raum anscheinend nur sehr vereinzelt...

article

Optimal divestment time in supply chain redesign under oligopoly: evidence from shale oil production plants

Farzad Alavifard, Dmitry Ivanov, Jian He

International Transactions in Operational Research > 27 > 5 > 2559 - 2583

This paper investigates the optimal timing for the closure of production plants in the context of supply chain redesign. We consider producers operating under oligopoly and analyze their optimal decisions with the aid of real options. We contextualize this study in the energy supply chain, where revenue is heavily influenced by the Organization of the Petroleum Exporting Countries (OPEC). It is optimal...

article

Capitalizing on specialists' services in rural family health unit: Interventional study

Madiha Said Abdel‐Razik, Arwa Mohamed Hosney El Shafei, AlShaimaa Mohammed Abd Al Moety, Reham Yosry Al Amir, more

The International Journal of Health Planning and Management > 35 > 1 > 140 - 151

For achieving universal health coverage in Egypt, Ministry of Health aims to improve the accessibility to quality specialized health care. Objectives The objectives of the study were to explore legal and regulatory environment for the policy of specialists' visits to unit and assess the impact of gynecology specialist's visits on utilization pattern of gynecological services and clients' satisfaction...

article

Towards the integration of lean principles and optimization for agricultural production systems: a conceptual review proposition

Nestor E Caicedo Solano, Guisselle A García Llinás, Jairo R Montoya‐Torres

Journal of the Science of Food and Agriculture > 100 > 2 > 453 - 464

Operative planning in agricultural production has historically had the objective of improving yields and quality. Sowing, cropping, and harvesting are usually treated independently, and waste and the sustainability of operations are generally not integrated into operational planning methodologies for agricultural production. This study shows the need to have a clear and precise methodology to minimize...

article

Identifying menstrual migraine– improving the diagnostic criteria using a statistical method

Mathias Barra, Fredrik A. Dahl, E. Anne MacGregor, Kjersti Grøtta Vetvik

The Journal of Headache and Pain > 2019 > 20 > 1 > 1-12

Objective To develop a robust statistical tool for the diagnosis of menstrually related migraine. Background The International Classification of Headache Disorders (ICHD) has diagnostic criteria for menstrual migraine within the appendix. These include the requirement for menstrual attacks to occur within a 5-day window in at least 23 $\frac {2}{3}$ menstrual cycles ( 23 $\frac {2}{3}$-criterion)...

article

Research Capacity Strengthening in Sub-Saharan Africa: Recognizing the Importance of Local Partnerships in Designing and Disseminating HIV Implementation Science to Reach the 90–90–90 Goals

Anna Kalbarczyk, Wendy Davis, Sam Kalibala, Scott Geibel, more

AIDS and Behavior > 2019 > 23 > 2 > 206-213

Capacity building in implementation science is integral to PEPFAR’s mission and to meeting the 90–90–90 goals. The USAID funded Project SOAR sponsored a 4 day workshop for investigators and governmental and non-governmental partners from 12 African countries. The workshop was designed to address both findings from a pre-workshop online needs assessment as well as capacity challenges across the capacity...

article

Improving Clinic Operational Efficiency and Utilization with RTLS

Bjorn Berg, Grant Longley, Jordan Dunitz

Journal of Medical Systems > 2019 > 43 > 3 > 1-9

New sources of operational data are leading to novel healthcare delivery system design and opportunities to support operational planning and decision-making. Technologies such as real time locating systems (RTLS) provide a unique view and understanding of how healthcare delivery settings behave and respond to operational design changes. In this paper RTLS data from an outpatient clinical setting is...

article

Design of placing the container reloading station by applying the Operations Research methods: a research study

Ondrej Stopka

Archiwum Motoryzacji > 2019 > Vol. 85, nr 3 > 123--136

The manuscript is focused on the design of methodical procedure to locate container reloading station of national importance in the examined country. Slovakia represents the investigated country where ten container reloading stations , specialized above all in transshipment of loading units, are currently in operation. The introductory parts of the manuscript outline the most important concepts associated...

article

Improving the efficiency of the operating room environment with an optimization and machine learning model

Michael Fairley, David Scheinker, Margaret L. Brandeau

Health Care Management Science > 2019 > 22 > 4 > 756-767

The operating room is a major cost and revenue center for most hospitals. Thus, more effective operating room management and scheduling can provide significant benefits. In many hospitals, the post-anesthesia care unit (PACU), where patients recover after their surgical procedures, is a bottleneck. If the PACU reaches capacity, patients must wait in the operating room until the PACU has available...

article

Proposed Architecture for Energy Efficiency and Comfort Optimization in Smart Homes

P. U. B. Albuquerque, D. K. De A. Ohi, N. S. Pereira, B. De A. Prata, more

Journal of Control, Automation and Electrical Systems > 2018 > 29 > 6 > 718-730

In this paper a smart home controller proposal is formalized as a multi-objective integer linear programming problem that minimizes energy consumption and maximizes comfort. A comfort objective function is tested for several tariff scenarios including one with renewable sources as local off-grid micro-generation. The proposed model specifies best times to activate real household appliances based on...

article

An optimization model for management of empty containers in distribution network of a logistics company under uncertainty

Ahmad Hosseini, Tobias Sahlin

Journal of Industrial Engineering International > 2019 > 15 > 4 > 585-602

In transportation via containers, unbalanced movement of loaded containers forces shipping companies to reposition empty containers. This study addresses the problem of empty container repositioning (ECR) in the distribution network of a European logistics company, where some restrictions impose decision making in an uncertain environment. The problem involves dispatching empty containers of multiple...

article

Optimal Planning and Analysis of Continuous Production Models

V. I. Kuvykin

Automation and Remote Control > 2018 > 79 > 2 > 384-390

The paper suggests analysis methods for optimal planning models in oil refining. The basic trends of optimization models construction are described. It is shown that parametric analysis is vital for improving the efficiency of activity. Finally, the economic efficiency of the suggested methods is estimated.

article

Lack of generalizability of observational studies' findings for turnover time reduction and growth in surgery based on the State of Iowa, where from one year to the next, most growth was attributable to surgeons performing only a few cases per week

Franklin Dexter, Craig Jarvie, Richard H. Epstein

Journal of Clinical Anesthesia > 2018 > 44 > C > 107-113

Three observational studies at large teaching hospitals found that reducing turnover times resulted in the surgeons performing more cases. We sought to determine if these findings are generalizable to other hospitals, because, if so, reducing turnover times may be an important mechanism for hospitals to use for growing caseloads.Observational cohort study.116 hospitals in Iowa with inpatient or outpatient...

article

Reserve Policy Optimization for Scheduling Wind Energy and Reserve

Mojgan Hedayati-Mehdiabadi, Kory W. Hedman, Junshan Zhang

IEEE Transactions on Power Systems > 2018 > 33 > 1 > 19 - 31

The rapid increase in the integration of renewable resources has given rise to challenges in power system operations. Due to the uncertainty and variability of renewable generation, additional reserves may be needed to maintain reliability. Uncertainty complicates the process of economic dispatch and renders the deterministic optimization approach less effective. Existing optimization solutions for...

article

Querying Beneficial Constraints Before Clustering Using Facility Location Analysis

Ahmad Ali Abin

IEEE Transactions on Cybernetics > 2018 > 48 > 1 > 312 - 323

This paper examines the problem of querying beneficial constraints before clustering. Existing methods in this area choose constraints heuristically based on some prior assumptions on the usefulness of constraints. However, the usefulness and propagation of constraints are two important issues in the constraints selection that are not investigated simultaneously in most existing works. This paper...

article

Pretreatment loss to follow-up of tuberculosis patients in Chennai, India: a cohort study with implications for health systems strengthening

Beena E. Thomas, Ramnath Subbaraman, Senthil Sellappan, Chandra Suresh, more

BMC Infectious Diseases > 2018 > 18 > 1 > 1-11

Background Pretreatment loss to follow-up (PTLFU) is a barrier to tuberculosis (TB) control in India’s Revised National TB Control Programme (RNTCP). PTLFU studies have not been conducted in India’s mega-cities, where patient mobility may complicate linkage to care. Methods We collected data from patient registries for May 2015 from 22 RNTCP designated microscopy centers (DMCs) in Chennai and audited...

article

Offline penalty price determination method for transmission thermal constraint relaxations

Jonghwan Kwon, Kory W. Hedman

Electric Power Systems Research > 2018 > 154 > C > 257-265

This paper proposes an offline penalty price determination process for transmission thermal constraint relaxations. System operators utilize various market models, which are highly complex due to operating requirements as well as physical restrictions of assets, to manage electric energy markets while ensuring a reliable supply of electric power. System operators enable constraint relaxations in market...

article

Constraint programming and operations research

J. N. Hooker, W.-J. Hoeve

Constraints > 2018 > 23 > 2 > 172-195

We present an overview of the integration of constraint programming (CP) and operations research (OR) to solve combinatorial optimization problems. We interpret CP and OR as relying on a common primal-dual solution approach that provides the basis for integration using four main strategies. The first strategy tightly interweaves propagation from CP and relaxation from OR in a single solver. The second...

article

A bibliometric analysis of operations research and management science

José M. Merigó, Jian-Bo Yang

Omega > 2017 > 73 > C > 37-48

Bibliometric analysis is the quantitative study of bibliographic material. It provides a general picture of a research field that can be classified by papers, authors and journals. This paper presents a bibliometric overview of research published in operations research and management science in recent decades. The main objective of this study is to identify some of the most relevant research in this...

article

A New Optimization Model for Reliable Team Formation Problem Considering Experts’ Collaboration Network

Mohammad Fathian, Mohamad Saei-Shahi, Ahmad Makui

IEEE Transactions on Engineering Management > 2017 > 64 > 4 > 586 - 593

The objective of this study is to propose a new optimization model for the formation of a reliable team of experts, who have a certain number of skills and best collaboration with each other. The proposed mathematical model maximized team reliability by considering the probability of unreliable experts that may leave the team with the probability (1-Q) and proposed a backup for each unreliable member...

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Der Einsatz Mathematischer Optimierung für Fragestellungen im Bergbau – aktuelle Fallstudien

Optimal divestment time in supply chain redesign under oligopoly: evidence from shale oil production plants

Capitalizing on specialists' services in rural family health unit: Interventional study

Towards the integration of lean principles and optimization for agricultural production systems: a conceptual review proposition

Identifying menstrual migraine– improving the diagnostic criteria using a statistical method

Research Capacity Strengthening in Sub-Saharan Africa: Recognizing the Importance of Local Partnerships in Designing and Disseminating HIV Implementation Science to Reach the 90–90–90 Goals

Improving Clinic Operational Efficiency and Utilization with RTLS

Design of placing the container reloading station by applying the Operations Research methods: a research study

Improving the efficiency of the operating room environment with an optimization and machine learning model

Proposed Architecture for Energy Efficiency and Comfort Optimization in Smart Homes

An optimization model for management of empty containers in distribution network of a logistics company under uncertainty

Optimal Planning and Analysis of Continuous Production Models

Lack of generalizability of observational studies' findings for turnover time reduction and growth in surgery based on the State of Iowa, where from one year to the next, most growth was attributable to surgeons performing only a few cases per week

Reserve Policy Optimization for Scheduling Wind Energy and Reserve

Querying Beneficial Constraints Before Clustering Using Facility Location Analysis

Pretreatment loss to follow-up of tuberculosis patients in Chennai, India: a cohort study with implications for health systems strengthening

Offline penalty price determination method for transmission thermal constraint relaxations

Constraint programming and operations research

A bibliometric analysis of operations research and management science

A New Optimization Model for Reliable Team Formation Problem Considering Experts’ Collaboration Network

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