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PHYSICS (587 journals)            First | 1 2 3 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 3)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 13)
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 7)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 7)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 8)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 1)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 13)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 10)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 13)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 11)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 13)
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Nanotechnology     Hybrid Journal   (Followers: 7)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 8)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal  
International Journal of Physical Sciences     Open Access  
International Journal of Physics     Open Access   (Followers: 11)
International Journal of PIXE     Hybrid Journal  
International Journal of Plasticity     Hybrid Journal   (Followers: 7)
International Journal of Quantum Information     Hybrid Journal   (Followers: 4)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal   (Followers: 1)
International Journal of Solids and Structures     Hybrid Journal   (Followers: 15)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 7)
International Journal of Theoretical and Applied Multiscale Mechanics     Hybrid Journal   (Followers: 3)
International Journal of Theoretical and Mathematical Physics     Open Access   (Followers: 11)
International Journal of Theoretical Physics     Hybrid Journal   (Followers: 16)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 17)
International Journal on Smart Sensing and Intelligent Systems     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 11)
International Materials Reviews     Hybrid Journal   (Followers: 14)
Inverse Problems     Hybrid Journal   (Followers: 3)
IOP Conference Series: Materials Science and Engineering     Open Access   (Followers: 8)
Iranian Journal of Medical Physics     Open Access  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 6)
Izvestiya Atmospheric and Oceanic Physics     Hybrid Journal   (Followers: 1)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 2)
Japanese Journal of Applied Physics     Full-text available via subscription   (Followers: 5)
JETP Letters     Hybrid Journal   (Followers: 3)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 11)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 12)
Journal of Advances in Physics     Open Access   (Followers: 19)
Journal of Applied Mathematics and Mechanics     Full-text available via subscription   (Followers: 8)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 8)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 6)
Journal of Applied Physics     Hybrid Journal   (Followers: 74)
Journal of Applied Remote Sensing     Hybrid Journal   (Followers: 68)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 8)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 39)
Journal of Basic and Applied Physics     Open Access   (Followers: 4)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 18)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 319)
Journal of Computational Physics     Hybrid Journal   (Followers: 61)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 10)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 12)
Journal of Elasticity     Hybrid Journal   (Followers: 6)
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 2)
Journal of Electronic Materials     Hybrid Journal   (Followers: 4)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 5)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 17)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 1)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 4)
Journal of Geometry and Physics     Full-text available via subscription  
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 137)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 21)
Journal of High Energy Physics     Hybrid Journal   (Followers: 17)
Journal of High Energy Physics, Gravitation and Cosmology     Open Access  
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 18)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 7)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 13)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 9)
Journal of Luminescence     Hybrid Journal   (Followers: 4)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 23)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 2)
Journal of Materials Science     Hybrid Journal   (Followers: 22)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 4)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 4)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 8)
Journal of Mathematical Physics     Hybrid Journal   (Followers: 23)
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Medical Ultrasonics     Hybrid Journal   (Followers: 2)
Journal of Micro/Nanolithography MEMS and MOEMS     Hybrid Journal   (Followers: 18)
Journal of Modern Physics     Open Access   (Followers: 8)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 5)
Journal of Motor Behavior     Hybrid Journal   (Followers: 9)
Journal of Multiscale Modeling     Hybrid Journal  
Journal of Nanophotonics     Hybrid Journal   (Followers: 9)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 9)
Journal of Nonlinear Dynamics     Open Access   (Followers: 5)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 1)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 1)
Journal of Optics     Hybrid Journal   (Followers: 8)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 3)
Journal of Physical Chemistry B     Full-text available via subscription   (Followers: 43)
Journal of Physical Chemistry C     Full-text available via subscription   (Followers: 36)
Journal of Physical Oceanography     Full-text available via subscription   (Followers: 12)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 8)
Journal of Physics A : Mathematical and Theoretical     Hybrid Journal   (Followers: 18)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 4)
Journal of Physics D : Applied Physics     Hybrid Journal   (Followers: 13)
Journal of Physics: Condensed Matter     Hybrid Journal   (Followers: 6)
Journal of Physics: Conference Series     Open Access   (Followers: 1)
Journal of Plasma Physics     Hybrid Journal   (Followers: 20)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 23)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 2)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 2)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 31)
Journal of Research in Physics     Open Access   (Followers: 11)
Journal of Rheology     Full-text available via subscription   (Followers: 5)
Journal of Romance Studies     Full-text available via subscription  
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 3)
Journal of Scientific Research     Open Access  
Journal of Semiconductors     Full-text available via subscription   (Followers: 4)
Journal of Sensors     Open Access   (Followers: 24)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Lighting     Open Access  
Journal of Spectroscopy     Open Access   (Followers: 7)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Hybrid Journal   (Followers: 3)
Journal of Testing and Evaluation     Full-text available via subscription   (Followers: 19)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 32)
Journal of the Brazilian Society of Mechanical Sciences     Open Access   (Followers: 2)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of Theoretical and Applied Physics     Open Access   (Followers: 8)
Journal of Tissue Engineering     Open Access   (Followers: 6)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 11)
Journal of Vibration and Control     Hybrid Journal   (Followers: 42)
Journal of Visualization     Hybrid Journal   (Followers: 3)
Journal of Zhejiang University SCIENCE A     Hybrid Journal  
Jurnal Fisika     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Pendidikan Fisika     Open Access   (Followers: 4)
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access   (Followers: 2)
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Jurnal Sains dan Pendidikan Fisika     Open Access  
Karbala International Journal of Modern Science     Open Access   (Followers: 3)
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Les Houches Summer School Proceedings     Full-text available via subscription   (Followers: 1)
Letters in Mathematical Physics     Hybrid Journal   (Followers: 2)
Light : Science & Applications     Open Access   (Followers: 1)
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 2)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 3)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 3)
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 29)
Matéria (Rio de Janeiro)     Open Access  
Materials & Design     Hybrid Journal   (Followers: 42)
Materials at High Temperatures     Full-text available via subscription   (Followers: 4)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 17)
Materials Research     Open Access   (Followers: 6)
Materials Research Bulletin     Hybrid Journal   (Followers: 26)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 7)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 41)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 20)
Materials Science and Engineering: C     Hybrid Journal   (Followers: 17)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 15)
Materials Science and Technology     Hybrid Journal   (Followers: 41)
Materials Today Physics     Hybrid Journal  
Matériaux & Techniques     Full-text available via subscription   (Followers: 1)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 1)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access  
Meccanica     Hybrid Journal  
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 5)
Mechanics of Materials     Hybrid Journal   (Followers: 22)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 2)
Metamaterials     Hybrid Journal   (Followers: 4)
Micro and Nano Systems Letters     Open Access   (Followers: 5)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 10)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 9)
Modern Instrumentation     Open Access   (Followers: 40)
Modern Physics Letters A     Hybrid Journal   (Followers: 14)
Modern Physics Letters B     Hybrid Journal   (Followers: 10)
Molecular Astrophysics     Full-text available via subscription  
Molecular Diversity     Hybrid Journal  
Moscow University Physics Bulletin     Hybrid Journal  
Multibody System Dynamics     Hybrid Journal   (Followers: 2)
NANO     Hybrid Journal   (Followers: 5)
Nano Letters     Full-text available via subscription   (Followers: 63)
Nano Reviews & Experiments     Open Access   (Followers: 13)

  First | 1 2 3 | Last

Journal Cover Flexible Services and Manufacturing Journal
  [SJR: 1.325]   [H-I: 34]   [1 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1936-6582 - ISSN (Online) 1936-6590
   Published by Springer-Verlag Homepage  [2349 journals]
  • Evaluating the long-term effects of appointment scheduling policies in a
           magnetic resonance imaging setting
    • Authors: Paola Cappanera; Filippo Visintin; Carlo Banditori; Daniele Di Feo
      Abstract: This study addresses the problem of scheduling magnetic resonance imaging examinations to reduce indirect waiting time—that is, the time that elapses between the patient’s call for an appointment and the scheduled appointment time. Two alternative scheduling approaches are proposed: online and offline characterized, respectively, by the absence or presence of a batch of patients waiting for an appointment. Specifically, with an online approach, patients are scheduled when they call for an appointment, and consequently there is no need to have a batch of patients. On the contrary, the offline approach assumes that patients are given an expected waiting time when they call; they are subsequently called back and assigned an appointment within few days. With an offline approach, patients are thus collected in a batch until a scheduling policy is run; clearly, the batch size or equivalently the frequency according to which patients are scheduled impacts on the performance of the scheduling policy. The offline approach allows a better planning with respect to the online approach where the decision regarding a patient is greatly affected by the schedule of patients who called before him. On the other side, the online approach allows a prompt accommodation of the patient. In an attempt at trade-off these two approaches, the offline one is experimented with three different scheduling frequencies: once per week, two times per week, and three times per week. The paper describes a novel MIP model for implementation of the offline approach and a greedy heuristic for implementation of the online one. Online and offline approaches are then compared in terms of effectiveness, equity, efficiency and discrimination power, using a rolling horizon of 52 weeks and assuming different demand patterns. The comparison includes an evaluation of the impact of two managerial practices—examination overlapping and radiologist cross-training—when using the two forms of scheduling. The key findings are that the offline approach achieves smaller, less variable values for tardiness and enables scheduling of a higher number of patients in situations where capacity is scarce. As to managerial practices, overlapping is found to be relatively more effective than cross-training when an offline approach is adopted, while for online scheduling, cross-training is more effective than overlapping. The results presented are based on an extensive experimental campaign based on real data coming from a leading Italian hospital.
      PubDate: 2018-01-30
      DOI: 10.1007/s10696-018-9306-1
  • A note on: a flexible crane scheduling methodology for container terminals
    • Authors: Jiang Hang Chen
      Abstract: In Dik and Kozan (2017) published in Flexible Services and Manufacturing Journal, a Tabu search algorithm was proposed for the quay crane scheduling problem raised in the operation of container terminals. According to the computational experiments and results, Dik and Kozan (2017) demonstrated that by relaxing the non-preemption restrictions when handling tasks (i.e., flexible jobs) and quay cranes’ moving pattern to unidirectional/bidirectional manner, through Tabu search, better solutions of the quay crane scheduling problems could be obtained in an efficient way. However, it should be highlighted that compared to most of the relevent researches in the literature, in Dik and Kozan (2017), the initial quay crane positions were disregarded. Dik and Kozan (2017) has discussed that the improvements on makespan can be attributed to flexible jobs and unidirectional/bidirectional schedules. In this note, the impact of initial crane positions on the makespan would be investigated.
      PubDate: 2018-01-27
      DOI: 10.1007/s10696-018-9307-0
  • An investigation of shift and break flexibility with real-time break
           assignments using a rolling horizon approach
    • Authors: Youngbum Hur; Jonathan F. Bard; Markus Frey; Ferdinand Kiermaier
      Abstract: The purpose of this paper is to investigate the benefits that flexibility offers in daily shift scheduling, especially when demand is uncertain. The different forms of flexibility considered include shift start times, the number of breaks, break lengths, and break placement. Five related mixed-integer programming models are developed and used to compare break scheduling in advance and either sequentially or in real time for various shift and break profiles. The first model integrates the shift and break assignments while the second model assigns shifts only. The third and fourth models assume an optimal set of shifts. In the former case, the goal is to assign as many breaks as possible without violating demand requirements; in the latter case, the objective is to minimize undercoverage while ensuring that all shifts receive their required breaks. The fifth model takes a rolling horizon approach and provides the greatest advantage when responding to unexpected demand fluctuations over the day. Tests were performed using work requirements for ground handlers at a major European airport and showed in part that when demand is known and the most flexible break type is used, the total uncovered periods in a day can be decreased by up to 94% (down from 270 to 16). When demand is uncertain, we found that using our rolling horizon procedure reduces undercoverage by up to 41% compared to scheduling breaks in advance.
      PubDate: 2018-01-23
      DOI: 10.1007/s10696-018-9305-2
  • An integrated analysis of capacity allocation and patient scheduling in
           presence of seasonal walk-ins
    • Authors: Tugba Cayirli; Pinar Dursun; Evrim D. Gunes
      Abstract: This study analyzes two decision levels in appointment system design in the context of clinics that face seasonal demand for scheduled and walk-in patients. The macro-level problem addresses access rules dealing with capacity allocation decisions in terms of how many slots to reserve for walk-ins and scheduled patients given fixed daily capacity for the clinic session. The micro-level problem addresses scheduling rules determining the specific time slots for scheduled arrivals. A fully-integrated simulation model is developed where daily demand actualized at the macro level becomes an input to the micro model that simulates the in-clinic dynamics, such as the arrivals of walk-ins and scheduled patients, as well as stochastic service times. The proposed integrated approach is shown to improve decision-making by considering patient lead times (i.e., indirect wait), direct wait times, and clinic overtime as relevant measures of performance. The traditional methods for evaluating appointment system performance are extended to incorporate multiple trade-offs. This allows combining both direct wait and indirect wait that are generally addressed separately due to time scale differences (minutes vs. days). The results confirm the benefits of addressing both decision levels in appointment system design simultaneously. We investigate how environmental factors affect the performance and the choice of appointment systems. The most critical environmental factors emerge as the demand load, seasonality level, and percentage of walk-ins, listed in the decreasing order of importance.
      PubDate: 2018-01-08
      DOI: 10.1007/s10696-017-9304-8
  • Quay crane scheduling problem with considering tidal impact and fuel
    • Authors: Shucheng Yu; Shuaian Wang; Lu Zhen
      Pages: 345 - 368
      Abstract: This study investigates a quay crane scheduling problem with considering the impact of tides in a port and fuel consumption of ships. A mixed-integer nonlinear programming model is proposed. Some nonlinear parts in the model are linearized by approximation approaches. For solving the proposed model in large-scale problem instances, both a local branching based solution method and a particle swarm optimization based solution method are developed. Numerical experiments with some real-world like cases are conducted to validate the effectiveness of the proposed model and the efficiency of the proposed solution methods.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9248-4
      Issue No: Vol. 29, No. 3-4 (2017)
  • Real-time container storage location assignment at a seaport container
           transshipment terminal: dispersion levels, yard templates, and sensitivity
    • Authors: Matthew E. H. Petering; Yong Wu; Wenkai Li; Mark Goh; Robert de Souza; Katta G. Murty
      Pages: 369 - 402
      Abstract: We present the results of four experiments that link a seaport container terminal’s overall productivity to the system that automatically selects storage locations for export containers in real time as they enter the terminal. Experiment 1 introduces the concept of a container dispersion level and tests the performance of several dispersion levels at various terminals. Experiment 2 considers the math-programming-based yard template concept that has received much attention in recent years. By evaluating yard templates under simulated operating conditions, we provide a link between yard templates and overall terminal productivity that has been absent from previous studies. Experiments 3 and 4 examine how the vessel berthing policy and yard truck traveling speed affect the performance of the storage systems considered in Experiments 1–2. The experiments provide insight into options for real-time decision making at container terminals that is rare in that (1) performance is measured in overall terms and (2) detailed measures of performance for all entities—berths, vessels, groundslots, quay cranes, yard cranes, yard trucks, and containers—involved in every container’s complete lifetime at the terminal are provided.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9247-5
      Issue No: Vol. 29, No. 3-4 (2017)
  • The impact of lanes segmentation and booking levels on a container
           terminal gate congestion
    • Authors: María D. Gracia; Rosa G. González-Ramírez; Julio Mar-Ortiz
      Pages: 403 - 432
      Abstract: Recent trends in port performance improvement include the coordination of intermodal transport logistics to reduce congestion and inefficiencies generated at the gates of the terminals. Congestion at the gate of a terminal generates several problems such as pollution and long waiting times for truck carriers. As part of the strategies and best practices to reduce congestion, some ports worldwide have implemented advanced booking systems in order to coordinate truck arrivals and deliveries at the gate of their container terminals. We will refer to these systems as truck appointment systems. In general terms, a truck appointment system provides a mechanism where truck carriers coordinate their time of arrival at the container terminal based on an advanced booking. In this way, gate managers are able to better plan their port operations and equipment allocation, to reduce the waiting times of trucks and improve the turnaround time for container deliveries. In order to account for the real benefits of such systems, the particular conditions of each container terminal need to be considered. In this paper, a case study of a Chilean port terminal is analyzed. The aim is to provide recommendations that may reduce congestion and improve the container terminal´s gate control of truck arrivals, turnaround times and container deliveries by means of efficient lane segmentation policies. Several scenarios were examined under which different booking levels are considered for an environment in which the arrival of containers can vary significantly from day to day and on a seasonal basis. As a basis for our study a fractional factorial design is performed in order to analyze the impact of controllable factors on two service levels measures, which reduce the number of scenarios needed to obtain robust conclusions.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9256-4
      Issue No: Vol. 29, No. 3-4 (2017)
  • Re-marshalling in automated container yards with terminal appointment
    • Authors: Filip Covic
      Pages: 433 - 503
      Abstract: As a result of scarce land availability, growing competition and throughput, container terminals are increasing the stacking height of yard blocks to fulfil the demand for storage area. Due to inadequate retrieval information at initial stacking, shuffle moves can occur during retrieval operations as containers may be stacked in a sequence which does not correspond to the actual retrieval sequence. Automated stacking cranes can perform re-marshalling during periods of no crane workload to shift unproductive moves during retrieval operations to phases of idle time. Terminal appointment systems (TAS) enhance landside sequence information when external trucks (XT) announce their arrival beforehand. Under these circumstances, it is beneficial for terminal planers to understand the effects of using re-marshalling in combination with TAS. The purpose of this work is to introduce an online rule-based solution method for the re-marshalling problem with and without TAS. A simulation model of a fully operating yard block is used as environment to compare the proposed method with a benchmark heuristic from the literature. All tests are conducted for single and multiple Rail-Mounted-Gantry-Crane systems with different yard block sizes. It is also shown that solving the re-marshalling problem with the proposed algorithm generates results that reduce shuffle moves by 30% on average and by up to 50% in the best case, while always performing better in the worst case in comparison with not performing re-marshalling. Afterwards, influences on the method of selected TAS parameters are evaluated numerically. Results show that imprecise XT arrival information, not deviating above a certain threshold, significantly contribute to reducing congestion by mitigating XT waiting time and levelling arrival peaks. These benefits can be achieved without imposing restrictions on the arrival schedule preferred by XT companies.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-017-9278-6
      Issue No: Vol. 29, No. 3-4 (2017)
  • Analyzing complex service structures in liner shipping network design
    • Authors: Kristian Thun; Henrik Andersson; Marielle Christiansen
      Pages: 535 - 552
      Abstract: One of the most important strategic decisions of a liner shipping company is the design of a set of cyclic routes, services, for container vessels to provide transport for goods from origins to destinations. This problem is called the liner shipping network design problem (LSNDP). The cyclic nature of the services as well as the possibility of transshipping cargoes between services makes the problem difficult to solve for large instances. Therefore, it is common to make assumptions regarding the structure of the services. We analyze the effect of different structures ranging from simple ones visiting a port once in a service, to butterfly services where one port can be visited twice in a service and a more general structure where every port in a service can be visited more than once. To perform these analyses, we have developed a new mathematical model for the LSNDP where there are no limitations on the number of visits to each port. The model is solved by a branch-and-price method, where we for the sake of computational time have reduced the number of visits per port on a service to a maximum of two. The computational study shows that complex service structures can create more cost-efficient networks and that the objective value can be improved by allowing general service structures even for small sized instances.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9262-6
      Issue No: Vol. 29, No. 3-4 (2017)
  • Determining departure times in dynamic and stochastic maritime routing and
           scheduling problems
    • Authors: Gregorio Tirado; Lars Magnus Hvattum
      Pages: 553 - 571
      Abstract: In maritime transportation, decisions are made in a dynamic setting where many aspects of the future are uncertain. However, most academic literature on maritime transportation considers static and deterministic routing and scheduling problems. This work addresses a gap in the literature on dynamic and stochastic maritime routing and scheduling problems, by focusing on the scheduling of departure times. Five simple strategies for setting departure times are considered, as well as a more advanced strategy which involves solving a mixed integer mathematical programming problem. The latter strategy is significantly better than the other methods, while adding only a small computational effort.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9242-x
      Issue No: Vol. 29, No. 3-4 (2017)
  • Designing a maritime supply chain for distribution of wood pellets: a case
           study from southern Norway
    • Authors: Kristian Andersen; Henrik Andersson; Marielle Christiansen; Roar Grønhaug; Aslanbek Sjamsutdinov
      Pages: 572 - 600
      Abstract: Heat is traditionally produced from non-renewable energy sources. Some of this energy could be produced from renewable energy sources such as wood pellets. In Norway, pellets are today transported by trucks, but it is not profitable to use the road-based transportation network for long distances. Therefore, the Norwegian consumption of pellets is low. The purpose of this paper is to present a feasibility study for evaluating if a maritime supply chain for distribution of pellets along the Norwegian coast is economically viable. A mixed integer programming model is developed as a basis for decision support, and the model utilizes the structure of the geographical network resulting in a novel and innovative formulation of the problem. The main findings are that the operating profit margin is around 8% for the supply chain and that the model is flexible and able to design maritime distribution chains that are suitable for different levels of demand.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9269-z
      Issue No: Vol. 29, No. 3-4 (2017)
  • Stochastic programming for flexible global supply chain planning
    • Authors: Yingjie Fan; Frank Schwartz; Stefan Voß; David L. Woodruff
      Pages: 601 - 633
      Abstract: When ocean transportation is used, possible disruptions both at sea and on land should be taken into account in the planning process of the affected supply chain. In this paper, a framework to enable flexible global supply chain operational planning in stochastic environments is presented. In order to cope with unexpected events like natural or man-made disasters, flexible international long-distance transportation modes and postponement strategies are taken into account in our supply chain model. In order to balance supply chain costs and the flexibility of supply chains, a two-stage multi-scenario stochastic programming model is developed where the stochastic events are represented by corresponding scenarios. High quality solutions of all our problem instances are generated by using a Python based stochastic programming framework to solve the model. Finally, managerial insights related to flexible supply chain planning in stochastic environments are derived from our computational results.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9261-7
      Issue No: Vol. 29, No. 3-4 (2017)
  • The Cargo Fare Class Mix problem for an intermodal corridor: revenue
           management in synchromodal container transportation
    • Authors: Bart van Riessen; Rudy R. Negenborn; Rommert Dekker
      Pages: 634 - 658
      Abstract: The intermodal hinterland transportation of maritime containers is under pressure from port authorities and shippers to achieve a more integrated, efficient network operation. Current optimisation methods in literature yield limited results in practice, though, as the transportation product structure limits the flexibility to optimise network logistics. Synchromodality aims to overcome this by a new product structure based on differentiation in price and lead time. Each product is considered as a fare class with a related service level, allowing to target different customer segments and to use revenue management for maximising revenue. However, higher priced fare classes come with tighter planning restrictions and must be carefully balanced with lower priced fare classes to match available capacity and optimise network utilisation. Based on the developments of intermodal networks in North West European, such as the network of European Gateway Services, the Cargo Fare Class Mix problem is proposed. Its purpose is to set limits for each fare class at a tactical level, such that the expected revenue is maximised, considering the available capacity at the operational level. Setting limits at the tactical level is important, as it reflects the necessity of long-term agreements between the transportation provider and its customers. A solution method for an intermodal corridor is proposed, considering a single intermodal connection towards a region with multiple destinations. The main purpose of the article is to show that using a limit on each fare class increases revenue and reliability, thereby outperforming existing fare class mix policies, such as Littlewood.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-017-9285-7
      Issue No: Vol. 29, No. 3-4 (2017)
  • The regional port competition with different terminal competition
    • Authors: Mingzhu Yu; Chung-Yee Lee; James Jixian Wang
      Pages: 659 - 688
      Abstract: This paper studies the regional container port competition problem which involves two port cities each with its own container terminal. We provide two-level game-theoretic models to characterize several practice-related issues, such as container terminal cooperation situation, and the difference between local in/out and transshipment container throughputs. Numerical experiments are conducted based on the port system in the Pearl River Delta area of China. We find that (1) the two ports in the heterogeneous regional port system should focus on differentiating services rather than compete with each other in every service; (2) the terminal cooperation may not be preferred by both of the port city governments; (3) the developed port will gradually dominate the transshipment container business in the system, leaving the developing port to focus its efforts on the local in/out container business instead.
      PubDate: 2017-12-01
      DOI: 10.1007/s10696-016-9254-6
      Issue No: Vol. 29, No. 3-4 (2017)
  • A decomposition heuristic to solve the two-stage lot sizing and scheduling
           problem with temporal cleaning
    • Authors: Alyne Toscano; Deisemara Ferreira; Reinaldo Morabito
      Abstract: This paper presents a study on the fruit-based beverage lot sizing and scheduling problem. This is a two-stage lot-scheduling problem with some features, such as the presence of buffers between the production stages, mandatory temporal cleanings for the preparation tanks (stage I) and production lines (stage II), and production synchronization between the production stages. To solve this problem, we propose two variations of a two-phase heuristic algorithm by devising a production stage decomposition scheme coupled with a constructive procedure. In the first phase, a one-stage lot sizing is solved by a mixed integer programming model, and in the second phase, scheduling and the synchrony between the stages are carried out using a constructive algorithm. The two variations of the heuristic are: Stage I Heuristics (S1H) and Stage II Heuristics (S2H). In S1H, production stage I is solved by a mathematical model and in S2H, production stage II is solved by another mathematical model. Data from a typical beverage company of a large worldwide brand was used in the computational tests. The results showed that the heuristics are able to find competitive solutions very quickly and that the S2H heuristic performs better than S1H.
      PubDate: 2017-12-29
      DOI: 10.1007/s10696-017-9303-9
  • Simulation-based optimization approach for simultaneous scheduling of
           vehicles and machines with processing time uncertainty in FMS
    • Authors: James T. Lin; Chun-Chih Chiu; Yu-Hsiang Chang
      Abstract: Many stochastic factors, such as vehicle congestion, deadlock or conflict, or stochastic processing time have significant effects on performance in scheduling problem in flexible manufacturing system (FMS). This paper proposed a simulation-based optimization, L-GAOCBA, to address the simultaneous scheduling of vehicles and machines in FMS. The simulation model is constructed to evaluate the performance of scheduling decision, and includes stochastic elements, such as vehicle congestion, deadlock, and uncertain processing time. Genetic algorithm (GA) combined with local search, L-GA, plays important role in exploring the good design alternative based on simulation output. Optimal computing budget allocation (OCBA) embedded with L-GA is used to allocate the number of replications for reducing simulation replications. The design of experiments is used to analyze and set the parameters of L-GA and OCBA. This study shows that L-GAOCBA is superior for enhancing solution quality and search efficiency.
      PubDate: 2017-12-29
      DOI: 10.1007/s10696-017-9302-x
  • Green logistics solutions
    • Authors: Emel Aktas; J. M. Bloemhof; Jan C. Fransoo; Hans-Otto Günther; Werner Jammernegg
      PubDate: 2017-12-04
      DOI: 10.1007/s10696-017-9301-y
  • Yard crane scheduling to minimize total weighted vessel loading time in
           container terminals
    • Authors: Shell Ying Huang; Ya Li
      Abstract: One of the most important objectives for container terminals is to minimize the total weighted turnaround time for vessels. Minimizing total weighted vessel loading time directly helps minimize total weighted vessel turnaround time. In this paper we consider the yard crane (YC) scheduling problem in a multi-vessel loading process. We propose a YC scheduling system that minimizes the total weighted maximum tardiness of loading jobs. Our experiments show that this is significantly more effective in the minimization of the total weighted vessel loading time than the existing YC scheduling methods that minimize job waiting time or makespan. Our scheduling system also has the ability to dynamically optimize the YC operations with the consideration of the maximum tardiness already incurred to each vessel earlier in the loading process. To evaluate against our YC scheduling system, an optimal algorithm to minimize makespan (useful if there is YCs shortage) and an optimal algorithm to minimize total weighted job tardiness (common in manufacturing) are also proposed.
      PubDate: 2017-11-07
      DOI: 10.1007/s10696-017-9299-1
  • Two decision models for berth allocation problem under uncertainty
           considering service level
    • Abstract: This paper examines the berth allocation problem, which is to assign a quay space and a service time to the vessels that have to be loaded and unloaded at a container terminal within a given planning horizon, with consideration of uncertain factors, mainly including the arrival and operation time of the calling vessels. Based on the concept of conflict, two kinds of service level are proposed and two decision models are constructed to minimize the total operational cost, which includes delay cost and non-optimal berthing location cost. The first model satisfies the service level of a specific scenario and the second one considers the service level across all scenarios. Due to the NP-hardness of the constructed model, a two-stage heuristics algorithm is employed to solve the problem. Finally, extensive numerical experiments are conducted to test the performances of the two proposed models and algorithm and help the port planners make decisions.
      PubDate: 2017-09-08
      DOI: 10.1007/s10696-017-9295-5
  • Editorial of special issue on ocean transportation logistics: making
           global supply chain effective
    • Authors: Kjetil Fagerholt; Kap-Hwan Kim; Chung-Yee Lee; Qiang Meng; Xiangtong Qi
      PubDate: 2017-08-30
      DOI: 10.1007/s10696-017-9293-7
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