An End-to-end Beacon Placement Optimization System for Indoor Positioning

It is more practical and efficient to deploy sensors in critical areas rather than common areas to ensure indoor positioning accuracy and reduce deployment cost. This study focused on the sensor placement optimization for critical-grid coverage problem with two objectives: accuracy and cost. After reviewing some related works, this article proposed a multi-objective optimization model for critical-grid coverage problem of indoor positioning considering k-coverage problem as well as the topological rationality of sensor distribution. Then, NSGA-II algorithm was used to solve the optimizing model of sensor placement. At last, the simulation experiment and real environment validation were conducted for proposed method. The results showed that the optimized schemes obtain a lower error (1.13, 1.21 m) and a higher reduction of sensor deployment cost than the uniform deployment scheme (1.44 m). As a conclusion, the proposed method could reduce the cost of sensor deployment while ensuring the accuracy of indoor positioning for critical areas. It also provides a new direction for improving the accuracy of indoor positioning.

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Surgical management of extracranial carotid artery aneurysms

VASA ◽

10.1024/0301-1526/a000528 ◽

2016 ◽

Vol 45 (3) ◽

pp. 223-228 ◽

Cited By ~ 2

Author(s):

Jan Paweł Skóra ◽

Jacek Kurcz ◽

Krzysztof Korta ◽

Przemysław Szyber ◽

Tadeusz Andrzej Dorobisz ◽

...

Keyword(s):

Carotid Artery ◽

Surgical Management ◽

Minor Stroke ◽

Stroke Rate ◽

Extracranial Carotid Artery ◽

Long Term Follow Up ◽

End To End ◽

Dacron Patch ◽

Major Stroke

Abstract. Background: We present the methods and results of the surgical management of extracranial carotid artery aneurysms (ECCA). Postoperative complications including early and late neurological events were analysed. Correlation between reconstruction techniques and morphology of ECCA was assessed in this retrospective study. Patients and methods: In total, 32 reconstructions of ECCA were performed in 31 symptomatic patients with a mean age of 59.2 (range 33 - 84) years. The causes of ECCA were divided among atherosclerosis (n = 25; 78.1 %), previous carotid endarterectomy with Dacron patch (n = 4; 12.5 %), iatrogenic injury (n = 2; 6.3 %) and infection (n = 1; 3.1 %). In 23 cases, intervention consisted of carotid bypass. Aneurysmectomy with end-to-end suture was performed in 4 cases. Aneurysmal resection with patching was done in 2 cases and aneurysmorrhaphy without patching in another 2 cases. In 1 case, ligature of the internal carotid artery (ICA) was required. Results: Technical success defined as the preservation of ICA patency was achieved in 31 cases (96.9 %). There was one perioperative death due to major stroke (3.1 %). Two cases of minor stroke occurred in the 30-day observation period (6.3 %). Three patients had a transient hypoglossal nerve palsy that subsided spontaneously (9.4 %). At a mean long-term follow-up of 68 months, there were no major or minor ipsilateral strokes or surgery-related deaths reported. In all 30 surviving patients (96.9 %), long-term clinical outcomes were free from ipsilateral neurological symptoms. Conclusions: Open surgery is a relatively safe method in the therapy of ECCA. Surgical repair of ECCAs can be associated with an acceptable major stroke rate and moderate minor stroke rate. Complication-free long-term outcomes can be achieved in as many as 96.9 % of patients. Aneurysmectomy with end-to-end anastomosis or bypass surgery can be implemented during open repair of ECCA.

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Indoor positioning system based on received signal strength: RSS

PsycEXTRA Dataset ◽

10.1037/e518112013-018 ◽

2012 ◽

Author(s):

Phongchai Nilas ◽

Burin Baitoei

Keyword(s):

Signal Strength ◽

Indoor Positioning ◽

Received Signal Strength ◽

Positioning System ◽

Indoor Positioning System

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Raw material mix optimization system for sintering plant and blast furnace at CST

Revue de Métallurgie ◽

10.1051/metal:2006157 ◽

2006 ◽

Vol 103 (2) ◽

pp. 76-81

Author(s):

C. Perin Filho ◽

D. Tassinari Miranda ◽

E. Medeiros Milanez ◽

E. Luiz Massanori Harano ◽

E. Torres Bispo dos Santos ◽

...

Keyword(s):

Blast Furnace ◽

Raw Material ◽

Optimization System ◽

Raw Material Mix ◽

Sintering Plant

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Reliability of the Mangled Extremity Severity Score in the Management of Peripheral Vascular Injuries in Children: A Retrospective Review

International Journal of Angiology ◽

10.1055/s-0040-1720970 ◽

2020 ◽

Author(s):

Ahmed Mousa ◽

Ossama M. Zakaria ◽

Mai A. Elkalla ◽

Lotfy A. Abdelsattar ◽

Hamad Al-Game'a

Keyword(s):

Severity Score ◽

Vein Graft ◽

Bypass Surgery ◽

Age Groups ◽

Vascular Injuries ◽

Peripheral Vascular ◽

Group Iii ◽

Mangled Extremity ◽

Group I ◽

End To End

AbstractThis study was aimed to evaluate different management modalities for peripheral vascular trauma in children, with the aid of the Mangled Extremity Severity Score (MESS). A single-center retrospective analysis took place between 2010 and 2017 at University Hospitals, having emergencies and critical care centers. Different types of vascular repair were adopted by skillful vascular experts and highly trained pediatric surgeons. Patients were divided into three different age groups. Group I included those children between 5 and 10 years; group II involved pediatrics between 11 and 15 years; while children between 16 and 21 years participated in group III. We recruited 183 children with peripheral vascular injuries. They were 87% males and 13% females, with the mean age of 14.72 ± 04. Arteriorrhaphy was performed in 32%; end-to-end anastomosis and natural vein graft were adopted in 40.5 and 49%, respectively. On the other hand, 10.5% underwent bypass surgery. The age groups I and II are highly susceptible to penetrating trauma (p = 0.001), while patients with an extreme age (i.e., group III) are more susceptible to blunt injury (p = 0.001). The MESS has a significant correlation to both age groups I and II (p = 0.001). Vein patch angioplasty and end-to-end primary repair should be adopted as the main treatment options for the repair of extremity vascular injuries in children. Moreover, other treatment modalities, such as repair with autologous vein graft/bypass surgery, may be adopted whenever possible. They are cost-effective, reliable, and simple techniques with fewer postoperative complication, especially in poor/limited resources.

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