scholarly journals Numerical Analysis of Evacuation Start in Pangandaran

2021 ◽  
Vol 925 (1) ◽  
pp. 012044
Author(s):  
K A Sujatmiko ◽  
Y Okumura
Keyword(s):  
Numerical Analysis ◽  
Satisfactory Result ◽  
Field Survey ◽  
Low Cost ◽  
Evacuation Planning ◽  
Target Area ◽  
Behavior Model ◽  
Evacuation Simulation ◽  
Evacuee Behavior ◽  
Insight Into

Abstract Tsunami evacuations plan should consider the behavior of local people. In this study tsunami evacuation start was analyzed using tsunami evacuation simulation consist of evacuee generation and evacuee behavior model. Pangandaran west beach was selected as the target area due to its popularity as a tourist spot and fishery activities in West Java. Evacuation simulations were conducted using 500 evacuations agents with tsunami shelter and grand mosques as goal for the safer place. A total of six evacuation scenarios were made using a different set of evacuation triggers parameter value with the combination of influence weight and effective range. The simulation result indicates that the influence weight which made 57% of people start evacuation immediately after the earthquake happened showed an instantaneous evacuation. Simulation result that was using lower influence weight and lower exposure range showed a more gradual tsunami evacuation. The simulation gave promising results that Pangandaran people could be safely evacuating if they raise their awareness and preparedness. The low-cost simulations that were used in this study provide an insight into the behaviors of Indonesians during disaster evacuation and might use as support for tsunami evacuation planning. However, to produce more satisfactory result we need to conduct field survey and tsunami drill to gain more information of people behavior during tsunami evacuation.

scholarly journals Completely non-fused electron acceptor with 3D-interpenetrated crystalline structure enables efficient and stable organic solar cell

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lijiao Ma ◽  
Shaoqing Zhang ◽  
Jincheng Zhu ◽  
Jingwen Wang ◽  
Junzhen Ren ◽  
...  
Keyword(s):  
Organic Solar Cell ◽  
Low Cost ◽  
Three Dimensional ◽  
Molecular Geometry ◽  
Interpenetrating Network ◽  
Fused Ring ◽  
Molecule Design ◽  
End Capping ◽  
Conversion Efficiencies ◽  
Insight Into

AbstractNon-fullerene acceptors (NFAs) based on non-fused conjugated structures have more potential to realize low-cost organic photovoltaic (OPV) cells. However, their power conversion efficiencies (PCEs) are much lower than those of the fused-ring NFAs. Herein, a new bithiophene-based non-fused core (TT-Pi) featuring good planarity as well as large steric hindrance was designed, based on which a completely non-fused NFA, A4T-16, was developed. The single-crystal result of A4T-16 reveals that a three-dimensional interpenetrating network can be formed due to the compact π–π stacking between the adjacent end-capping groups. A high PCE of 15.2% is achieved based on PBDB-TF:A4T-16, which is the highest value for the cells based on the non-fused NFAs. Notably, the device retains ~84% of its initial PCE after 1300 h under the simulated AM 1.5 G illumination (100 mW cm−2). Overall, this work provides insight into molecule design of the non-fused NFAs from the aspect of molecular geometry control.

Design and topological optimization of rear pressure bulkhead for a typical aircraft

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marshal Thakran ◽  
Meenakshi ◽  
Jitender Sharma ◽  
Charles Gilbert Martin
Keyword(s):  
Numerical Analysis ◽  
Significant Influence ◽  
Design Methodology ◽  
Structural Integrity ◽  
Topological Optimization ◽  
Content Type ◽  
Iterative Design ◽  
Practical Implications ◽  
Insight Into ◽  
Selection Of

Purpose The purpose of this paper is to evaluate the model of a rear pressure bulkhead with different design optimizations to meet the pressurized cabin requirements of an aircraft. Design/methodology/approach This paper presents the results of the static analysis of a dome-shaped rear pressure bulkhead model designed in Catia-v5. Numerical analysis of model meshed in hyper-mesh and solved using Opti-Struct for iterative design optimizations. Findings All the iterative models are analyzed at 9 Psi. Rear pressure bulkhead designed with L-section stringer shows better results than the model optimized with T-section stringer for the same thickness. The model optimized with L-shaped stinger also reduces the weight of the bulkhead without affecting the structural integrity. Practical implications It has been concluded in this paper that the selection of specific shapes of the stringers shows a significant influence on weight reduction. Originality/value This paper provides a topical, technical insight into the design and development of a rear pressure bulkhead. It also outlines the future development of dome-shaped rear pressure bulkhead.

Contrasting profiles of product returners and keepers

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dong Hwan Lee
Keyword(s):  
New York ◽  
Household Income ◽  
Field Survey ◽  
Survey Study ◽  
Content Type ◽  
Demographic Profiles ◽  
Post Purchase ◽  
Practical Implications ◽  
Insight Into ◽  
Study Offer

Purpose This paper aims to investigate whether the consumers who return a product and those who end up keeping a product after experiencing post-purchase dissonance (PPD) possess distinct underlying characteristics. Design/methodology/approach Field survey study consisting of two separate surveys conducted with consumers of New York City and neighboring areas of New York and New Jersey. Findings Product returners and keepers exhibited disparate demographic profiles regarding gender and household income, along with ethnicity to some extent. The two groups also exhibited different predispositions with regard to confidence in the purchase decision and expectations about their purchase. Finally, returners and keepers were engaged in divergent thoughts, feelings and activities to cope with PPD. Practical implications The findings of this study offer marketing practitioners new knowledge and insight into understanding product returners and keepers and will assist them in developing strategies to reduce and manage increasing product returns by consumers more effectively. Originality/value This study is the first to present empirical evidence that product returners and keepers have distinct profiles of demographic characteristics and predispositions toward purchase. The study also has found divergent PPD coping strategies used by the two types of consumers, which exposes an obsolete understanding of PPD in the marketing literature.

scholarly journals Working Mechanism of Nonresonance Friction in Driving Linear Piezoelectric Motors with Rigid Shaking Beam

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Xifu Chen ◽  
Qian Lu ◽  
Weiqing Huang ◽  
Yin Wang
Keyword(s):  
Numerical Analysis ◽  
Normal Vibration ◽  
Low Cost ◽  
Theoretical Data ◽  
Friction Model ◽  
Working Mechanism ◽  
Ultrasonic Motors ◽  
Vibration Model ◽  
Piezoelectric Motors ◽  
Output Characteristics

A kind of nonresonance shaking beam motors is proposed with the advantages of simple structure, easy processing, and low cost due to its wide application prospects in precision positioning technology and precision instruments. The normal vibration model between the stator and slider is divided into contact and noncontact types to investigate the nonresonance friction drive principle for this motor. The microscopic kinematics model for stator protruding section and the interface friction model for motor systems during both operating stages are established. Accordingly, the trajectory of the stator protruding section consists of two different elliptical motions, which differ from those of resonance-type motors. The output characteristic of the nonresonance shaking beam motor is proposed under steady working conditions with reference to the research method of standing-wave-type ultrasonic motors. Numerical analysis is used to simulate the normal vibration and mechanical output characteristics of the motor. Experimental and theoretical data fitting validates the numerical analysis results and allows the future optimization of nonresonance-type motors.

scholarly journals Numerical analysis of effects of an open-pit coal mine to groundwater

2019 ◽  
Vol 4 (2) ◽  
pp. 70-74
Author(s):  
Viktória Mikita ◽  
Balázs Kovács
Keyword(s):  
Numerical Analysis ◽  
Coal Mine ◽  
Cost Efficiency ◽  
Low Cost ◽  
Open Pit ◽  
Contaminated Sites ◽  
Coal Basin ◽  
Contaminant Plumes ◽  
Key Factor ◽  
Groundwater Regime

In this study we investigated the hydrogeological problems of an open-pit brown coal mine in the Borsod coal basin with Processing Modflow software. The coal mine is located in the valley of the Sajó-river with high transmissivity overburden layer where the traditional dewatering solutions were not encouraging due to inrush risks and low cost-efficiency. A new way of barrier forming was found out and numerically simulated to prove the efficiency of the solution. Since there are several contaminated sites in the surroundings it was a key factor to assure that the new mine dewatering technique has only a negligible effect on the groundwater regime that undisturbs the known contaminant plumes nearby.

Evacuation Planning and Spatial Decision Making

2011 ◽  
pp. 358-373 ◽  
Author(s):  
F. N. de Silva ◽  
R. W. Eglese ◽  
M. Pidd
Keyword(s):  
Decision Making ◽  
Technology Development ◽  
Emergency Planning ◽  
Evacuation Planning ◽  
Prototype System ◽  
Gis Technology ◽  
Decision Systems ◽  
Spatial Decision Making ◽  
Decision Making Processes ◽  
Evacuee Behavior

Issues concerning the development of Spatial Decision Systems for evacuation planning include realistic modelling of evacuee behavior, decision-making processes that take place during an evacuation, logistics, generating realistic scenarios, validation, technology development and trends for the future. These issues are discussed with reference to the development of a prototype system called CEMPS, which integrates simulation and GIS technology for emergency planning.

Reliability Analysis

2020 ◽  
pp. 1-44
Author(s):  
Cherry Bhargava
Keyword(s):  
High Speed ◽  
Manufacturing Industry ◽  
Low Cost ◽  
Operating Performance ◽  
Operating Time ◽  
Electronic System ◽  
Health Condition ◽  
Operating Characteristics ◽  
Integrated Technique ◽  
Insight Into

As the integration of components are increasing from VLSI to ULSI level. This may lead to damage of electronic system because each component has its own operating characteristics and conditions. So, health prognostic techniques are used that comprise a deep insight into failure cause and effects of all the components individually as well as an integrated technique. It will raise alarm, in case health condition, of the components drift from the desired outcomes. From toy to satellite and sand to silicon, the major key constraint of designing and manufacturing industry are towards enhanced operating performance at less operating time. As the technology advances towards high-speed and low-cost gadgets, reliability becomes a challenging issue.

scholarly journals Effects of introducing low-cost high-speed rail on air-rail competition: Modelling and numerical analysis for Paris-Marseille

2020 ◽  
Vol 99 ◽  
pp. 145-162
Author(s):  
Yixiao Wang ◽  
Luoyi Sun ◽  
Ruud H. Teunter ◽  
Jianhong Wu ◽  
Guowei Hua
Keyword(s):  
Numerical Analysis ◽  
High Speed ◽  
Low Cost ◽  
High Speed Rail

The Design and Development of a Non-Contact Printer for Product Coding

1988 ◽  
Vol 202 (2) ◽  
pp. 87-92
Author(s):  
D King ◽  
R Luk ◽  
P Massingberd-Mundy ◽  
A Sendell ◽  
R Holmes
Keyword(s):  
Product Information ◽  
Low Cost ◽  
Target Area ◽  
Design And Development ◽  
High Quality ◽  
Cost System

This paper is concerned with the design and development of a low-cost system for applying product information to a target area on the top of a carton passing through a cartoning machine at, typically, 60 cartons a minute. A prototype was designed and built which prints high-quality preprogrammed characters on to a range of carton sizes, can be adjusted in the x, y and z planes and can be fitted to a variety of existing packaging machines.

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