scholarly journals A Framework for Modeling "Real-Life" Airline Networks

2009 ◽  
Vol 8 (3) ◽  
Author(s):  
Volodymyr Bilotkach
Keyword(s):  
Airline Industry ◽  
Real Life ◽  
Cost Savings ◽  
Hub And Spoke ◽  
Mixed Network ◽  
One Stop ◽  
Set Up ◽  
Point To Point ◽  
The One ◽  
The Cost

This paper develops a new model, which allows for the co-existence of hub-and-spoke and point-to-point networks in the airline industry. Passengers are segmented between the non-stop and one-stop services. In the baseline model, the monopoly airline’s ability to segment the market and effectively set up the mixed network depends on the cost savings due to the through-hub service relative to exogenous quality difference between the one-stop and non-stop flights. Socially inefficient entry with the new non-stop service where an incumbent is operating the hub-and-spoke network is possible.

Decision onRegional Logistics Network Based on H-S and P-P Network: Taking Tobacco Transportation Logistics as anExample

2021 ◽  
Vol 7 (6) ◽  
pp. 5340-5353
Author(s):  
Wang Bangjun ◽  
Wei Yixi ◽  
Ji Feng ◽  
Zhu Wei ◽  
Yu Pan
Keyword(s):  
Fixed Cost ◽  
Particle Swarm Algorithm ◽  
Cost Difference ◽  
Hub And Spoke ◽  
Total Cost ◽  
Logistics Network ◽  
Logistics Enterprise ◽  
Transportation Logistics ◽  
Point To Point ◽  
The Cost

Objectives: The logistics hub construction has always been the short board of logistics network planning in China. In order to improve the decision-making efficiency of logistics enterprise’s hub selection and reduce its comprehensive operation cost, this paper establishes a cost difference model for hub-and-spoke(H-S) and point-to-point(P-P) networks considering the fixed cost of hubs, transportation and route costs based on the 0-1 integer nonlinear programming. The model aims at minimizing the cost difference between the two networks, and divides the fixed cost of the hubs into three situations: full lease, lease and self-built, and fully self-built. Finally, this paper takes tobacco transportation logistics as an example, and use particle swarm algorithm to solve the model by using tobacco transportation logistics data of a logistics enterprise in Jiangsu Province. The results show that: (i) in the case of complete leasing, the total cost of the H-S network decreases with the increase of the number of hubs, and the cost change has a point of intersection with the total cost of the P-P network;(ii) when the lease and self-build are mixed, the increase is first reduced and then increased, it is U-shaped and has a minimum value, and there are two intersections with the total cost of the P-P network;(iii) the situation of completely self-built and fully leased is just the opposite. This paper takes tobacco transportation logistics as a representative, and provides a reference for logistics companies to choose the appropriate regional logistics network structure and different pivot points.

The U.S. Airline Industry in 1995

2017 ◽  
pp. 1-38
Author(s):  
James D. Dana ◽  
David A. Schmitt
Keyword(s):  
Airline Industry ◽  
Industry Structure ◽  
Industry Analysis ◽  
Hub And Spoke ◽  
Cost And Benefit ◽  
Basic Industry ◽  
And Performance ◽  
Point To Point ◽  
Domestic Airline ◽  
The U.S

Provides an overview of the domestic airline industry. Offers details on industry structure and performance necessary for basic industry analysis (or five forces analysis). Also emphasizes cost and benefit drivers, especially hub-and-spoke vs. point-to-point service and sources of differentiation.

scholarly journals Modeling a Three-Mode Hybrid Port-Hinterland Freight Intermodal Distribution Network with Environmental Consideration: The Case of the Yangtze River Economic Belt in China

2018 ◽  
Vol 10 (9) ◽  
pp. 3081 ◽  
Author(s):  
Qian Dai ◽  
Jiaqi Yang ◽  
Dong Li
Keyword(s):  
Distribution System ◽  
Yangtze River ◽  
Distribution Network ◽  
Real Life ◽  
The Yangtze River ◽  
Road Transportation ◽  
Hub And Spoke ◽  
The Road ◽  
Environmental Objectives ◽  
Point To Point

Efficiency challenges of the hinterland connectivity, along with growing green concerns necessitate the integration of economic goals and environmental considerations, for port-hinterland logistics problems. This study focused on innovative modeling, for a three-mode port-hinterland intermodal freight distribution system, from the perspective of shippers. A hybrid distribution network topology, combining point to point, hub-and-spoke, and connected hubs was designed as route alternatives for loads from origin to destination. A bi-objective decision framework involving analytical scenarios of emissions limitation, emissions taxation, and an emissions trading scheme, was developed for policy analysis, and then applied to a real-life hinterland logistics network in the Yangtze River Economic Belt in China. The results showed that the implementation of the three emissions policies, all resulted in great changes in flows between intermodal routes and achieved emissions reduction goals. Nevertheless, the conflict between logistics costs and carbon emissions, differs from policy to policy. Some inflection points were identified to offer decision supports on policy insights, for the port-hinterland distribution network. Lastly, a sensitivity analysis on cost and emissions parameters was given. It revealed that the flow changes and trade-off relationship between economic and environmental objectives, were both sensitive to the road transportation mode.

Saline Locks in Prehospital Care

1994 ◽  
Vol 9 (3) ◽  
pp. 190-192 ◽  
Author(s):  
Michael F. Boyle ◽  
Brian Kuntz
Keyword(s):  
Saline Solution ◽  
Prehospital Care ◽  
Cost Savings ◽  
Prehospital Setting ◽  
Local Infiltration ◽  
Fluid Infusion ◽  
Traumatic Injuries ◽  
Cumulative Cost ◽  
Set Up ◽  
The Cost

AbstractObjectives:1) To determine if paramedics could select appropriate patients for use of the saline lock; 2) to evaluate saline-lock patency upon arrival at the emergency department (ED); and 3) to define any cost-savings associated with the use of the saline lock.Population:Patients in the prehospital setting who required intravenous (IV) access, but did not require fluid resuscitation. Patients with hypotension or multiple traumatic injuries were excluded.Methods:Paramedics were given the option for the use of either the saline lock or a routine IV set-up. Initially, the reservoir was flushed with 1 ml 0.9 N saline solution and the flush was repeated only if medications subsequently were completed for each patient. Information collected included: 1) demographics; 2) reason for selection; 3) need for fluid infusion; 4) conversion of the lock to a routine IV set-up; and 5) administration of medications through the lock. Failures included inability to flush after arrival to the ED, or local infiltration detected on flush while in the ED. Costs associated with the use of the saline locks were compared with those associated with the use of traditional IV set-ups. Cost-savings were calculated as the cost of a traditional IV set-up minus costs of the lock set-up.Results:A total of 58 male and 42 female patients was enrolled. All patients were assigned appropriately. The most commonly used indications included chest pain, possible stroke, and shortness of breath. Two locks were occluded, and two had infiltrated when flushed following arrival of the patient to the ED. Five patients had IV fluid bads initiated through the locks. Cumulative cost-saving were [U.S.]$130 to the hospitals and $1,710 to the patients or their carriers. Most paramedics were pleased with the performance and utility of the locks.Conclusions:The use of saline locks is an alternative to the use of traditional IVs in certain patients in the prehospital setting.

scholarly journals The performance of a flapping foil for a self-propelled fishlike body

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Damiano Paniccia ◽  
Luca Padovani ◽  
Giorgio Graziani ◽  
Renzo Piva
Keyword(s):  
Swimming Performance ◽  
Real Life ◽  
Minimum Cost ◽  
The Body ◽  
Cost Of Transport ◽  
Locomotion Speed ◽  
Optimal Efficiency ◽  
The One ◽  
The Cost ◽  
Flapping Foils

AbstractSeveral fish species propel by oscillating the tail, while the remaining part of the body essentially contributes to the overall drag. Since in this case thrust and drag are in a way separable, most attention was focused on the study of propulsive efficiency for flapping foils under a prescribed stream. We claim here that the swimming performance should be evaluated, as for undulating fish whose drag and thrust are severely entangled, by turning to self-propelled locomotion to find the proper speed and the cost of transport for a given fishlike body. As a major finding, the minimum value of this quantity corresponds to a locomotion speed in a range markedly different from the one associated with the optimal efficiency of the propulsor. A large value of the feathering parameter characterizes the minimum cost of transport while the optimal efficiency is related to a large effective angle of attack. We adopt here a simple two-dimensional model for both inviscid and viscous flows to proof the above statements in the case of self-propelled axial swimming. We believe that such an easy approach gives a way for a direct extension to fully free swimming and to real-life configurations.

scholarly journals Kualitas Pelayanan Publik Pemerintah Daerah (Kasus Pelayanan IMB pada KPTSA Kabupaten Bone)

2011 ◽  
Vol 1 (2) ◽  
Author(s):  
Rabina Yunus
Keyword(s):  
Public Service ◽  
Influential Factor ◽  
Leadership Model ◽  
The Public ◽  
Building Permit ◽  
One Stop ◽  
The Government ◽  
The One ◽  
The Cost

Measuring the quality of public services in the Building Permit in the one-stop services office of Bone Regency, using indicators of the ability of the apparatus, system services and influential factor in the service of Building permit. The data was collected through interviews, observation and documentation, as a way to know the description of the organizational structure, education and training, ability to work completion on schedule, the convenience in obtaining services, clarity of information, security and protection services to consumers in the Office of One-Stop Services (KPTSA) of Bone Regency. The factors that affect the public service of Building Permit (IMB), among others; timeliness, ease of filing, the accuracy of service, the cost of service. Factor is a barometer of the consumer or the use of the service, so whether or not the services provided by the government back to the things mentioned above. In the public service should further develop the quality of human resources and democratization, leadership model must shift from power to the approach of expertise (from macho to maestro) and democratic in spirit, close to the subordinates and apply humanistic model of bureaucracy is putting a human in its proportions.Mengukur kualitas pelayanan publik dalam Izin Bangunan di kantor pelayanan satu atap Kabupaten Bone, dengan menggunakan indikator kemampuan aparatur, sistem layanan dan faktor yang berpengaruh dalam pelayanan Membangun izin. Data dikumpulkan melalui wawancara, observasi dan dokumentasi, sebagai cara untuk mengetahui gambaran struktur organisasi, pendidikan dan pelatihan, kemampuan untuk bekerja selesai sesuai jadwal, kenyamanan dalam memperoleh pelayanan, kejelasan layanan informasi, keamanan dan perlindungan kepada konsumen di Kantor Pelayanan Satu Atap (KPTSA) Kabupaten Bone. Faktor- faktor yang mempengaruhi pelayanan publik Izin Mendirikan Bangunan (IMB), antara lain; ketepatan waktu, kemudahan pengajuan, akurasi pelayanan, biaya pelayanan. Faktor adalah barometer konsumen atau penggunaan layanan, sehingga apakah layanan yang diberikan oleh pemerintah kembali ke hal-hal tersebut di atas. Dalam layanan publik lebih lanjut harus mengembangkan kualitas sumber daya manusia dan demokratisasi, model kepemimpinan harus bergeser dari kekuasaan ke pendekatan keahlian (dari macho untuk maestro) dan berjiwa demokratis, dekat dengan bawahan dan menerapkan model birokrasi humanistik adalah meletakkan manusia dalam proporsinya.

scholarly journals PERLINDUNGAN HUKUM BAGI PENANAMAN MODAL ASING (PMA) DI INDONESIA

2020 ◽  
Vol 28 (1) ◽  
pp. 64
Author(s):  
Nanci Yosepin Simbolon ◽  
Muhammad Yasid ◽  
Beny Syahputra Sinaga ◽  
Nancy Saragih
Keyword(s):  
Foreign Investment ◽  
Study Data ◽  
Literature Study ◽  
National Economic ◽  
One Stop ◽  
Investment Law ◽  
The Republic ◽  
The Government ◽  
The One ◽  
The Cost

The existence of foreign investment in Indonesia is very important and strategic in supporting the implementation of national economic development and increasing economic growth in the community, which is regulated in law number 25 of 2007. This research is an empirical normative research, data collection is done by interview and literature study. Data processing is done by checking the data, the analysis in this study is done descriptive, that is, systematically doing research in the field to obtain data.The results show that in every foreign company that wants to invest in Indonesia, it must take care of the principle permit to the Investment Coordinating Board (BKPM) and the One-Stop Integrated Investment and Service Office (PTSP). So that the company can be established in Indonesia and its establishment is in accordance with the procedures of the foreign investment law so that the foreign investment company is fully under the responsibility and supervision of The Republic of Indonesia. The Government also provides relief to foreign investment in Indonesia in foreign up the cost of the entry of goods or electronic equipment for the purposes of Foreign Investment in Indonesia in investing.

Experience with radiofrequency closure of varicose veins (VNUS)

2005 ◽  
Vol 20 (2) ◽  
pp. 82-86 ◽  
Author(s):  
S K Das ◽  
N Sahoo ◽  
M Shanaz
Keyword(s):  
Saphenous Vein ◽  
Varicose Veins ◽  
Cost Savings ◽  
General Anaesthetic ◽  
Vein Thrombosis ◽  
Long Saphenous Vein ◽  
The One ◽  
Intraoperative Localization ◽  
The Cost ◽  
Deep Vein

Objective: The aim of this study was to reproduce the results of VNUS closure in our setting; to minimize the cost associated with the procedure; and to reduce the need for an experienced ultrasonographer during the procedure. Methods: Over a two-year period, 26 patients (42 limbs) were treated. A VNUS radio-frequency machine was used and assisted by intraoperative localization using Sonosite ultrasound, which was operated by the surgeon. All patients were treated under general anaesthetic. Nine patients were operated as a day case and 17 others stayed overnight. Median follow-up period was seven months. Results: The mean age of the patients was 37 years (range 19–69). Eighteen patients had primary and eight had recurrent varicose veins. Sixteen patients underwent bilateral and 10 underwent the unilateral procedure. Long saphenous vein (LSV) closure was performed in 41 limbs and short saphenous vein closure in two limbs. The LSV was accessed at the ankle in 36 and at knee in three limbs. In two other limbs, groin exploration with retrograde closure of the LSV was achieved. One patient developed numbness at phlebectomy site. None of the patients had deep vein thrombosis and all the treated veins were closed at the one-week scan. In bilateral cases, one catheter was used instead of two for closure in 12 of the 16 limbs. Using our approach, we were able to make a cost savings of £8,600.00. Conclusion: Technical success in radiofrequency vein closure can be achieved without the need for an additional ultrasonographer. We have shown that our approach is safe, effective and less expensive to deliver.

Helping Older Adults to Move Around in Their Community Where, When, and How They Wish: Protocol for Developing a One-Stop Platform Transportation Planning Service Co-Designed by and for Older Adults (Preprint)

2021 ◽  
Author(s):  
Veronique Provencher ◽  
Dany Baillargeon ◽  
Bessam Abdulrazak ◽  
Patrick Boissy ◽  
Mélanie Levasseur ◽  
...  
Keyword(s):  
Older Adults ◽  
Transportation Planning ◽  
Web Application ◽  
Leisure Activities ◽  
Real Life ◽  
Steering Committee ◽  
Planning Service ◽  
One Stop ◽  
The One ◽  
Older Citizens

BACKGROUND Multiple mobility-related challenges frequently appear with aging. As a result, many older adults have difficulty getting around, to go, for example, to doctors’ appointments or leisure activities. Although various means of transportation are currently available, older adults do not necessarily use them, partly because they do not know which ones are adapted to their needs and preferences. To foster older adults’ autonomy and freedom in their decision-making about transportation, it is crucial to help them make informed decisions about the means that suit them best. OBJECTIVE The aim of this study is to develop MOBILAINÉS, a one-stop platform transportation planning service to help older adults move around in their community where, when, and how they wish. More specifically, the study aims (1) to define older adults’ mobility needs and preferences in order to conceptualize the one-stop platform; (2) to co-create the prototype of the one-stop platform; and (3) to test the prototype with users in a real-life context. METHODS A Living Lab co-design approach is used for this ongoing study. This approach differs from traditional research on aging by facilitating intersectoral knowledge sharing and innovative solutions by and with older adults themselves. A steering committee composed of 8 stakeholders from the public, scientific, and private sectors as well as older citizens meets quarterly throughout the study. The design comprises three phases, each with several iterative subphases. (1) Exploration: through co-design workshops and literature reviews, members of the intersectoral committee define older adults’ mobility needs and preferences to support the conceptualization of the one-stop platform. (2) Experimentation: four personas are produced that reflect the different needs and preferences of typical older adult end-users of the platform. To develop a prototype, scenarios, and mockups (static designs of the web application) are created through co-design sessions with older adults (n=12) embodying these personas. (3) Evaluation: to test the usability of the prototype, changes in mobility, such as the ability to move around and get to activities on time, will be documented by and with older adults (n=30) after using the prototype. The steering committee will identify ways to support the adoption, implementation and scaling up of MOBILAINÉS to ensure that the project is sustainable. Qualitative and quantitative data will be triangulated according to each subphase objective. RESULTS The first phase began in September 2019. The study is scheduled for completion by mid-2023. CONCLUSIONS This innovative one-stop platform transportation planning service will merge existing transportation options in one place. By meeting a wide variety of older adults’ needs and preferences, MOBILAINÉS will help them feel comfortable and safe when moving around, which should increase their participation in meaningful activities and reduce the risk of social isolation.

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