scholarly journals Planning of Indoor Femtocell Network for LTE 2300 MHz on Railways Carriages Using Radiowave Propagation Simulator 5.4

2021 ◽  
Vol 13 (1) ◽  
pp. 18-24
Author(s):  
Adisti Nabilah Naufallia ◽  
Anggun Fitrian Isnawati ◽  
Khoirun Ni’amah
Keyword(s):  
Access Point ◽  
Cellular Communication ◽  
Radiowave Propagation ◽  
Network System ◽  
Passenger Cars ◽  
Femtocell Network ◽  
Cellular Communication Network ◽  
Calculation Results ◽  
Link Budget

The indoor communication system is a system to solve the problem of weak signals received by placing a Femtocell Access Point (FAP) indoor area. The design of an indoor cellular communication network system is carried out using the Radiowave Propagation Simulator 5.4. The parameters observed were Received Signal Level (RSL) and Signal to Interface Ratio (SIR). The case study is the passenger carriage of the executive, business and economy passenger class. The research includes link budget calculations based on coverage and capacity by considering the type of train carriage material and train passenger capacity. The calculation results based on capacity obtained 1 FAP for executive and business class train passenger cars, while economy class train passenger cars obtained 2 FAP. The best scenario for executive class namely scenario 1A, the receiver gets average RSL of approximately -32.26 dBm and SIR of 0 dB. The best scenario for business class namely scenario 2A, the receiver gets average RSL of approximately -32.57 dBm and SIR of 0 dB.  The best scenario for economy class namely scenario 3A, the receiver gets average RSL of approximately -29.80 dBm and the receiver gets average SIR of approximately 6.97 dB

scholarly journals Objective Evaluation of Drivability in Passenger Cars with Dual-Clutch Transmission: A Case Study of Static Gearshift Condition

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Wei Zhou ◽  
Xuexun Guo ◽  
Xiaofei Pei ◽  
Chengcai Zhang ◽  
Jun Yan ◽  
...  
Keyword(s):  
Fuzzy Ahp ◽  
Subjective Evaluation ◽  
Objective Evaluation ◽  
Dual Clutch Transmission ◽  
Evaluation Tool ◽  
Passenger Cars ◽  
Denoising Method ◽  
Fuzzy Matrix ◽  
Predictability Score

This paper is aimed at the problem that the subjective drivability evaluation by experienced test drivers is limited in time efficiency and is of high cost and poor repeatability. In this article, an intelligent drivability objective evaluation tool (I-DOET) for passenger cars with dual-clutch transmission (DCT) is developed and verified by real vehicle testing. First, the signal denoising method and its key parameters, which are suitable for drivability evaluation, are selected based on analytic hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS). Besides, combined with the uncertainty characteristics of subjective judgment, a mathematical model of the objective drivability evaluation FARODE (fuzzy AHP-RS based on objective drivability evaluation) is proposed by using the fuzzy comprehensive assessment (FCA) method. The AHP and rough set (RS) method are used to calculate the subjective and objective weights of the drivability evaluation, respectively, and the proportion of subjective and objective weights is determined by the principle of minimum relative information entropy. The fuzzy matrix is built by membership function of the evaluation indexes. Finally, the static gearshift condition focused on by the subjective evaluation experts is taken as a case study. The predictability score is obtained by combining the drivability quantization lever vector, comprehensive weight, and fuzzy matrix. The experimental results indicate that the proposed method is applicable for objective drivability evaluation in passenger cars with DCT.

Inherently safer design of a reactor network system: A case study

2018 ◽  
Vol 51 ◽  
pp. 112-124 ◽  
Author(s):  
Saeed Eini ◽  
Majid Javidi ◽  
Hamid Reza Shahhosseini ◽  
Davood Rashtchian
Keyword(s):  
Network System ◽  
System A ◽  
Inherently Safer Design ◽  
Reactor Network

scholarly journals Dekonstruksi titik akses diseminasi informasi pada Radio Boekoe

2019 ◽  
Vol 15 (2) ◽  
pp. 188
Author(s):  
Rukiyah Rukiyah ◽  
Ana Irhandayaningsih ◽  
Lydia Christiani
Keyword(s):  
Qualitative Method ◽  
Information Dissemination ◽  
Information Access ◽  
Access Point ◽  
Access Points ◽  
Study Approach ◽  
Internet Radio ◽  
Local Access

Introduction. Radio Boekoe as a community that affected by the determination of information technology, adapts through the deconstruction process of information dissemination access points by utilizing hybrid media. This study aims to discuss the deconstruction process of information dissemination access points on Radio Boekoe.Research methods. This research used a qualitative method with case study approach. The process of collecting data involved observations, interviews, and documentation studies. The informants are the founder, manager and volunteer of Radio Boekoe.Data Analysis. The research data was analyzed with the stages of reduction, display, and drawing conclusions.Results and Discussion. The deconstruction process of information access points on Radio Boekoe occurred through the use of hybrid media. The deconstruction process of the information access point was expanded to the process of adding information access capacity in the form of Bale Black Box co-working space.Conclusions. The process of deconstruction of information access points on Radio Boekoe occurs through the shifting of local access points in the form of the Gelaran Iboekoe to global hybrid media-based access in the form of internet radio. Furthermore, it is recommended to conduct a research to examine the effectiveness of using hybrid media to expand information access points.

CCN2 (Cellular Communication Network Factor 2) Deletion Alters Vascular Integrity and Function Predisposing to Aneurysm Formation

Hypertension ◽  
2021 ◽  
Author(s):  
R. Rodrigues-Díez Raul ◽  
Antonio Tejera-Muñoz ◽  
Vanesa Esteban ◽  
B. Steffensen Lasse ◽  
Raquel Rodrigues-Díez ◽  
...  
Keyword(s):  
Communication Network ◽  
Rapid Development ◽  
Cellular Communication ◽  
Aortic Aneurysms ◽  
Matricellular Protein ◽  
Ang Ii ◽  
Mineralocorticoid Receptor Antagonist ◽  
Functional Changes ◽  
Aneurysm Formation ◽  
Cellular Communication Network

Background: CCN2 (cellular communication network factor 2) is a matricellular protein involved in cell communication and microenvironmental signaling responses. CCN2 is known to be overexpressed in several cardiovascular diseases, but its role is not completely understood. Methods: Here, CCN2 involvement in aortic wall homeostasis and response to vascular injury was investigated in inducible Ccn2 -deficient mice, with induction of vascular damage by infusion of Ang II (angiotensin II; 15 days), which is known to upregulate CCN2 expression in the aorta. Results: Ang II infusion in CCN2-silenced mice lead to 60% mortality within 10 days due to rapid development and rupture of aortic aneurysms, as evidenced by magnetic resonance imaging, echography, and histological examination. Ccn2 deletion decreased systolic blood pressure and caused aortic structural and functional changes, including elastin layer disruption, smooth muscle cell alterations, augmented distensibility, and increased metalloproteinase activity, which were aggravated by Ang II administration. Gene ontology analysis of RNA sequencing data identified aldosterone biosynthesis as one of the most enriched terms in CCN2-deficient aortas. Consistently, treatment with the mineralocorticoid receptor antagonist spironolactone before and during Ang II infusion reduced aneurysm formation and mortality, underscoring the importance of the aldosterone pathway in Ang II–induced aorta pathology. Conclusions: CCN2 is critically involved in the functional and structural homeostasis of the aorta and in maintenance of its integrity under Ang II–induced stress, at least, in part, by disruption of the aldosterone pathway. Thus, this study opens new avenues to future studies in disorders associated to vascular pathologies.

Fragility curves for toppling of railroad locomotives

2020 ◽  
Vol 36 (4) ◽  
pp. 1623-1644
Author(s):  
Bruce F Maison
Keyword(s):  
United States ◽  
Size Effect ◽  
Case Studies ◽  
Fragility Curves ◽  
Western United States ◽  
Passenger Cars ◽  
Strong Earthquakes ◽  
Ground Shaking ◽  
Seismic Regions

Three locomotives that overturned (toppled) during strong earthquakes (>6.5M) are used as computer analytical case studies. The locomotives were at rest or traveling very slowly at the time of the earthquakes. Fragility curves are presented relating ground shaking intensity to likelihood of toppling. Supplemental studies determine the influence of various parameters, including track gauge, damping, sway-roll period, and size effect. The shaking intensities necessary for standard gauge (56.5 in) locomotives to topple are much greater than the median intensities of 2475-year earthquakes representative of those in high seismic regions of the western United States. A general conclusion is that standard gauge locomotives at rest are not susceptible to toppling in such earthquakes (≪50% chance). This can be expected to be the case as well for freight and passenger cars having sizes and slenderness similar to the case study locomotives. The study also provides insights about the toppling fragility of other large unanchored objects having similar proportions.

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