scholarly journals PLANNING OF THE AMOUNT OF TRAINS NEEDED FOR TRANSPORTATION BY RAIL

Transport ◽  
2007 ◽  
Vol 22 (2) ◽  
pp. 83-89 ◽  
Author(s):  
Jonas Jonaitis
Keyword(s):  
Planning Process ◽  
Rolling Stock ◽  
Maximum Efficiency ◽  
Repair Costs ◽  
Operational Characteristics ◽  
Optimal Service ◽  
Railway Planning ◽  
Key Factor ◽  
Crew Planning ◽  
Planning Problems

The article analyses the importance of planning process of rail transportation. Railway planning problems are presented in this paper. Planning the railways for years, months, weeks or days ahead leads to substantially different problems; in this regard railway planning problems can be strategic, tactical, operational and short‐term. Another way to classify railway planning problems is based on their target: they concern the timetable, the rolling stock and the crew. Planning the structure and volume of the rolling stock is a key factor in achieving maximum efficiency of transportation by rail as well as forecasting the demand for these transport facilities. The demand for trains is a time‐dependant variable which in each case should be determined by two main approaches. The first method allows us to determine quantitative parameters of rolling stock (i.e. kilometers logged, efficiency, turnover, etc.). The second is based on specially developed mathematical models relying on qualitative characteristics such as relative expenses, efficiency of the particular train, relative expenditure of resources, cost of the trains, etc. Planning the volume of the rolling stock the determination of optimal service life of the trains plays an important role. The calculations involve repair costs, number of overhauls, current expenses and operational characteristics.

scholarly journals STRATEGIC PLANNING OF THE ROLLING STOCK IN TRANSPORTATION BY RAIL

Transport ◽  
2002 ◽  
Vol 17 (6) ◽  
pp. 230-233
Author(s):  
Saulius Kaminskas
Keyword(s):  
Service Life ◽  
Mathematical Models ◽  
Rolling Stock ◽  
Maximum Efficiency ◽  
Repair Costs ◽  
Operational Characteristics ◽  
Optimal Service ◽  
Key Factor ◽  
Qualitative Characteristics

Planning the structure and volume of the rolling stock is a key factor of achieving maximum efficiency of transportation by rail as well as forecasting the demand for these it transport facilities. The demand for trains is a time — dependant variable which in each case should be determined by two main approaches. The first method allows us to determine quantitative parameters of rolling stock (i.e. kilometers logged, efficiency, turnover, etc.). The second is based on specially developed mathematical models relying on qualitative characteristics such as relative expenses, efficiency of the particular train, relative expenditure of resources, cost of the trains, etc. Planning the volume of the rolling stock the determination of optimal service life of the trains plays an important role. The calculations involve repair costs, number of overhauls, current expenses and other operational characteristics.

scholarly journals Pengembangan Perencanaan Pendidikan Islam (Konsep Strategi Pengembangan Di Indonesia)

2018 ◽  
Vol 16 (3) ◽  
pp. 294-307
Author(s):  
Dwi Priyanto
Keyword(s):  
Planning Process ◽  
Local Level ◽  
Educational Planning ◽  
Islamic Education ◽  
Strategy Development ◽  
Educational Activities ◽  
Education Planning ◽  
Strategic Factor ◽  
Key Factor ◽  
Planning Development

Abstract: Planning is a very important and strategic factor of its nature as a guide for the implementation of an activity in order to achieve the desired goals or objectives. Planning process as a series of activities is undertook to prepare a decision on what is expected to occur and what will be done. In the field of Islamic education, planning is one key factor for the effectiveness of the implementation of educational activities, national and local level. But in practice of the Islamic education implementation, educational planning is viewed as complementary factors, so objectives are not achieved maximally. The importance of planning development strategies of Islamic education in Indonesia is due to the implementation of Islamic education in Indonesia still needs to be done a repositioning effort, so that Islamic education can truly achieve its goals. Keywords: Strategy development and Islamic educational planning.

Accessing Knowledge, Information and Resources for Planning and Spatial Decision Support

2012 ◽  
Vol 1 (1) ◽  
pp. 90-97
Author(s):  
Naicong Li
Keyword(s):  
Decision Support ◽  
Conceptual Framework ◽  
Planning Process ◽  
Relevant Information ◽  
Spatial Decision Support ◽  
Knowledge Domains ◽  
Problem Types ◽  
Standard Set ◽  
Planning Problems ◽  
Knowledge Portal

To help synthesize and systematically organize the information, knowledge and resources for spatial decision support (SDS), and to help researchers and practitioners engaged in an actual planning process find relevant information and resources for solving their specific planning problems, the SDS Consortium and University of Redlands have developed a conceptual framework for SDS and a collection of SDS resources, hosted on the SDS Knowledge Portal. The conceptual framework includes a set of defined, inter-connected concepts pertaining to planning and spatial decision support, such as planning and decision problem types, application domains, knowledge domains and planning process including phases and steps. This conceptual framework is further used to organize a representative set of SDS resources, such as planning process workflows, methods, tools and models, data sources, case studies, literature, and so forth. The SDS Knowledge Portal facilitates learning of SDS and accessing SDS resources, promotes semantic clarity by adopting a common vocabulary for the user community, and promotes interoperability among SDS resources by using a standard set of concepts to define and classify these resources.

Operational Planning Using Mixed Integer Programming

1988 ◽  
Vol 64 (6) ◽  
pp. 485-488 ◽  
Author(s):  
H. Douglas Walker ◽  
Stephen W. Preiss
Keyword(s):  
Planning Process ◽  
Cost Savings ◽  
Mathematical Structure ◽  
Timber Harvesting ◽  
Operational Planning ◽  
Mixed Integer ◽  
Forest Planning ◽  
Planning Problem ◽  
Process Data ◽  
Planning Problems

A mathematical model was constructed and used to help plan five-year timber harvesting and delivery activities from an industrially managed public forest in Ontario. Harvest systems, harvest levels, and wood flows from compartments within the forest to various mills and delivery points were scheduled to minimize costs. The mathematical structure of the model may suggest applications to related forest planning problems. The model was useful in addressing the planning problem, and model results were used within the company's planning process. Data accuracy problems precluded assessing definitively the expected cost savings resulting from model use.

Sliding Control Without Reaching Phase and Its Application to Bipedal Locomotion

1993 ◽  
Vol 115 (3) ◽  
pp. 447-455 ◽  
Author(s):  
Tai-Heng Chang ◽  
Yildirim Hurmuzlu
Keyword(s):  
Trajectory Planning ◽  
Planning Process ◽  
Control Method ◽  
Variable Structure ◽  
Bipedal Locomotion ◽  
Tracking Errors ◽  
Structure Control ◽  
Control Scheme ◽  
Lyapunov’S Second Method ◽  
Planning Problems

A new variable structure control law based on the Lyapunov’s second method that can be used in trajectory planning problems of robotic systems is developed. A modified approach to the formulation of the sliding domain equations in terms of tracking errors has been presented. This approach possesses three distinct advantages: (i) it eliminates the reaching phase, (ii) it provides means to predict the entire motion and directly control the evolution of tracking errors, (iii) it facilitates the trajectory planning process in the joint and/or cartesian spaces. A planar, five-link bipedal locomotion model has been developed. Five constraint relations that cast the motion of the biped in terms of four parameters are developed. The new control method is applied to regulate the locomotion of the system according to the five constraint relations. Numerical simulation is performed to verify the ability of the controller to achieve steady gait by applying the proposed control scheme. Bifurcation diagrams of the periodic motions of the biped are used to demonstrate the improvements in controller performance that arise from the application of the proposed method.

scholarly journals A GIS-Based Metropolitan Railway Planning Process

1998 ◽  
Vol 15 ◽  
pp. 705-712 ◽  
Author(s):  
Hisao UCHIYAMA ◽  
Ken-ichi HOSHI
Keyword(s):  
Planning Process ◽  
Railway Planning

scholarly journals significance of local meteorological stations in research planning

2020 ◽  
pp. 87-91
Author(s):  
Zsuzsanna Novák ◽  
Lajos Juhász ◽  
Sámuel Zsolt Varga
Keyword(s):  
Data Collection ◽  
Planning Process ◽  
Research Area ◽  
Climatic Conditions ◽  
Meteorological Station ◽  
Material Resources ◽  
Research Planning ◽  
Key Factor ◽  
Weather Stations ◽  
The Relationship

The goal of research planning is to optimize human and material resources while maximizing efficiency. If there are databases that can be used as a substitute for own data collection, effective research can be facilitated by reallocating resources. In the case of environmental studies, the knowledge of the climatic conditions of the study period is known to be a key factor in research planning process.  In the present study, the data of our meteorological station in our research area (known as “Szamárháti Tanya”, Kesznyéten, Hungary) was compared with the measurements of meteorological stations operated by the competent water authority. Stations were taken into the study within a 10 and 20 km radius over a period of 21 months, to determine which provided more relevant data from the area. During the evaluation of results, the relationship between the local and regional weather stations were determined, and deductions were made from the obtained results to support the decision which of the targeted investigations could be of greater benefit. 

scholarly journals Railway and urban development in Patras: Towards the improved participation of local governance in complex planning problems

2015 ◽  
Vol 7 (3) ◽  
pp. 365-380
Author(s):  
Theodora Papamichail
Keyword(s):  
Urban Development ◽  
Planning Process ◽  
Local Governance ◽  
Infrastructure Development ◽  
Test Planning ◽  
Local Actors ◽  
Railway System ◽  
Planning Problems ◽  
Complex Planning

In recent years, the topic of integrated infrastructure and urban development requires the bottom-up approach in addition to the formal planning policies. This is specifically true for complex institutional frameworks, which need the enforcement of the interested public. Due to the socio-economic crisis in Greece, infrastructure networks have already been dramatically influenced by the fragmented decision-making among the different planning levels and actors. The case study presented in the paper relates to the improvement of a railway system in Patras, Greece (in narrow terms), but, in broader terms, the case study elucidates the informal planning procedure (called the Test Planning process) behind the railway improvement as such. The idea of using such a procedure in Patras emerged due to the different interests of various actors concerning the railway integration into the urban fabric in last two decades. However, it seems there is an absence of an effective cooperation between the initiators of this procedure and the local authorities. Research methodology is developed in several steps. Firstly, the broader problem and the potential of infrastructure development will be presented. Secondly, the Test Planning process will be presented shortly. In the end, the importance of local government in such a collaborative procedure will be mentioned and the case of local actors in Patras in the different phases of the Test Planning process will be under a critical scope towards the existing situation and the benefits in future steps.

Review of Current Maintenance Practices Used on Commuter and Passenger Rail Cars

2008 ◽  
Author(s):  
Lamont B. Ward
Keyword(s):  
Life Cycle ◽  
Condition Based Maintenance ◽  
Rolling Stock ◽  
Government Regulations ◽  
Passenger Rail ◽  
Reliability Centered Maintenance ◽  
Repair Costs ◽  
Maintenance Practice ◽  
Corrective Actions ◽  
Made In

Commuter and passenger railroads invest large amounts of capital to purchase and maintain their rolling stock. Funding for maintenance is largely derived from operating budgets with some funds coming from other sources. Realizing maintenance is vital to the safety and operations of their rolling stock, railroads use maintenance methodologies found in other industries along with government regulations and in-house practices to determine the best maintenance practice for their fleet. By using Condition Based Maintenance, Life Cycle Maintenance, and Reliability Centered Maintenance, railroads have increased reliability by isolating unreliable parts and performing corrective actions when needed. This increases scheduled maintenance and reduces unscheduled maintenance. However, unscheduled maintenance still impacts operations and reliability for railroads. Rolling stock repair costs due to unscheduled maintenance are not captured or analyzed so further improvement can be made in this area.

scholarly journals Mortars for 3D printing

2018 ◽  
Vol 143 ◽  
pp. 02013
Author(s):  
Olga Demyanenko ◽  
Ekaterina Sorokina ◽  
Natalya Kopanitsa ◽  
Yurij Sarkisov
Keyword(s):  
3D Printing ◽  
Cement Paste ◽  
Chemical Interaction ◽  
Early Age ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Operational Characteristics ◽  
Physico Chemical ◽  
Key Factor ◽  
Technical Specifications

The paper is aimed at developing scientifically proven compositions of mortars for 3D printing modified by a peat-based admixture with improved operational characteristics. The paper outlines the results of experimental research on hardened cement paste and concrete mixture with the use of modifying admixture MT-600 (thermally modified peat). It is found that strength of hardened cement paste increases at early age when using finely dispersed admixtures, which is the key factor for formation of construction and technical specifications of concrete for 3D printing technologies. The composition of new formations of hardened cement paste modified by MT-600 admixture were obtained, which enabled to suggest the possibility of their physico-chemical interaction while hardening.

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