Competitive impact model for site selection: the impact of competition, sales generators and own store cannibalization

1993 ◽  
Vol 3 (3) ◽  
pp. 237-259 ◽  
Author(s):  
J. Patrick Kelly ◽  
D. Carl Freeman ◽  
John M Emlen
Keyword(s):  
Site Selection ◽  
Impact Model ◽  
The Impact

scholarly journals Nitrogen Mass Balance and Pressure Impact Model Applied to an Urban Aquifer

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1171 ◽  
Author(s):  
Mitja Janža ◽  
Joerg Prestor ◽  
Simona Pestotnik ◽  
Brigita Jamnik
Keyword(s):  
Groundwater Quality ◽  
Urban Areas ◽  
Transport Model ◽  
Nitrate Concentration ◽  
Impact Model ◽  
Sewer System ◽  
Management Measures ◽  
Pressure Impact ◽  
The Impact ◽  
The City

The assurance of drinking water supply is one of the biggest emerging global challenges, especially in urban areas. In this respect, groundwater and its management in the urban environment are gaining importance. This paper presents the modeling of nitrogen load from the leaky sewer system and from agriculture and the impact of this pressure on the groundwater quality (nitrate concentration) in the urban aquifer located beneath the City of Ljubljana. The estimated total nitrogen load in the model area of 58 km2 is 334 ton/year, 38% arising from the leaky sewer system and 62% from agriculture. This load was used as input into the groundwater solute transport model to simulate the distribution of nitrate concentration in the aquifer. The modeled nitrate concentrations at the observation locations were found to be on average slightly lower (2.7 mg/L) than observed, and in general reflected the observed contamination pattern. The ability of the presented model to relate and quantify the impact of pressures from different contamination sources on groundwater quality can be beneficially used for the planning and optimization of groundwater management measures for the improvement of groundwater quality.

The impact model of cumulative damage on the detection threshold of space optical communication

2010 ◽  
Author(s):  
Guolong Chang ◽  
Yanping Zhou ◽  
Jing Ma ◽  
Jianqiang Zhou ◽  
Bingnan Zhao ◽  
...  
Keyword(s):  
Optical Communication ◽  
Detection Threshold ◽  
Cumulative Damage ◽  
Impact Model ◽  
Space Optical Communication ◽  
The Impact

scholarly journals Slow Decay of Impact in Equity Markets

2015 ◽  
Vol 01 (02) ◽  
pp. 1550007 ◽  
Author(s):  
X. Brokmann ◽  
E. Sérié ◽  
J. Kockelkoren ◽  
J.-P. Bouchaud
Keyword(s):  
Power Law ◽  
Equity Markets ◽  
Impact Model ◽  
Market Impact ◽  
Temporal Dependence ◽  
Raw Data ◽  
Slow Decay ◽  
First Approximation ◽  
Information Contents ◽  
The Impact

Using a proprietary dataset of meta-orders and prediction signals, and assuming a quasi-linear impact model, we deconvolve market impact from past correlated trades and a predictable return component to elicit the temporal dependence of the market impact of a single daily meta-order, over a 10-day horizon in various equity markets. We find that the impact of single meta-orders is to a first approximation universal and slowly decays to zero (or to a small value), possibly as a power-law. We show that autocorrelated order-flows and trade information contents fully accounts for the apparent plateau observed in the raw data. We discuss the possible bias introduced by the quasi-linear assumption.

scholarly journals Modelling the impact of a new tobacco product: review of Philip Morris International’s Population Health Impact Model as applied to the IQOS heated tobacco product

2018 ◽  
Vol 27 (Suppl 1) ◽  
pp. s82-s86 ◽  
Author(s):  
Wendy B Max ◽  
Hai-Yen Sung ◽  
James Lightwood ◽  
Yingning Wang ◽  
Tingting Yao
Keyword(s):  
Population Health ◽  
New Product ◽  
Health Impact ◽  
Tobacco Product ◽  
Dynamic State ◽  
Model Parameters ◽  
Impact Model ◽  
Tobacco Products ◽  
Philip Morris ◽  
The Impact

ObjectivesWe review the Population Health Impact Model (PHIM) developed by Philip Morris International and used in its application to the US Food and Drug Administration (FDA) to market its heated tobacco product (HTP), IQOS, as a modified-risk tobacco product (MRTP). We assess the model against FDA guidelines for MRTP applications and consider more general criteria for evaluating reduced-risk tobacco products.MethodsIn assessing the PHIM against FDA guidelines, we consider two key components of the model: the assumptions implicit in the model (outcomes included, relative harm of the new product vs cigarettes, tobacco-related diseases considered, whether dual or polyuse of the new product is modelled, and what other tobacco products are included) and data used to estimate and validate model parameters (transition rates between non-smoking, cigarette-only smoking, dual use of cigarettes and MRTP, and MRTP-only use; and starting tobacco use prevalence).ResultsThe PHIM is a dynamic state transition model which models the impact of cigarette and MRTP use on mortality from four tobacco-attributable diseases. The PHIM excludes morbidity, underestimates mortality, excludes tobacco products other than cigarettes, does not include FDA-recommended impacts on non-users and underestimates the impact on other population groups.ConclusionThe PHIM underestimates the health impact of HTP products and cannot be used to justify an MRTP claim. An assessment of the impact of a potential MRTP on population health should include a comprehensive measure of health impacts, consideration of all groups impacted, and documented and justifiable assumptions regarding model parameters.

The Impact Model

2018 ◽  
pp. 126-128
Author(s):  
Eric Heinze
Keyword(s):  
Impact Model ◽  
The Impact

Improved Model for Impact of Viscoplastic Bodies

2016 ◽  
Vol 715 ◽  
pp. 180-185 ◽  
Author(s):  
Masniezam Ahmad ◽  
Khairul Azwan Ismail ◽  
Fauziah Mat ◽  
William James Stronge
Keyword(s):  
Plastic Deformation ◽  
Wave Propagation ◽  
High Impact ◽  
Impact Response ◽  
Stress Wave Propagation ◽  
Impact Model ◽  
Direct Impact ◽  
Proposed Model ◽  
Improved Model ◽  
The Impact

This study proposes an improved viscoplastic impact model that calculates impact response for direct impact between two compact bodies. The proposed model employs spring and viscous elements that represent the energy loss due to plastic deformation and stress wave propagation, respectively. The impact response is calculated by solving differential equations through analytical and numerical methods. This model can accurately predict impact response for low, moderate and high impact speeds.

scholarly journals Experimental evaluation of a vibro-impact model for two adjacent shear-building structures

2018 ◽  
Vol 211 ◽  
pp. 03004
Author(s):  
Marcus Varanis ◽  
Arthur Mereles ◽  
Anderson Silva ◽  
José Balthazar ◽  
Ângelo Tusset ◽  
...  
Keyword(s):  
Beam Theory ◽  
Rotor Blades ◽  
Contact Theory ◽  
Building Structures ◽  
Impact Model ◽  
Nonlinear Characteristics ◽  
Strongly Nonlinear ◽  
Shear Building ◽  
The Impact ◽  
Euler Bernoulli Beam

The vibro-impact phenomenon is found in many engineering applications, from impact of floating ice with ships to rubbing between the stator structure and rotor blades in turbomachinery, and in most cases it is important to know the implication of this phenomenon in the mechanical system. This is often done by proposing vibro-impact models for describing the behavior of the system when subjected to periodically impacts. However, this modelling may be challenging due to the strongly nonlinear characteristics of the impact phenomenon. Therefore, this paper presents a vibro-impact model of two shearbuilding structures positioned side by side, where one of them is driven by an unbalanced DC motor. The structures were modeled using the Euler-Bernoulli beam theory and the contact was modeled based on the Hertz contact theory. In order to validate the model their responses were compared with experimental signals.

Source water impact model (SWIM) - a watershed guided approach as a new planing tool for indirect potable water reuse

2001 ◽  
Vol 43 (10) ◽  
pp. 267-275 ◽  
Author(s):  
J. E. Drewes ◽  
P. Fox
Keyword(s):  
Water Quality ◽  
Water Reuse ◽  
Reclaimed Water ◽  
Water Sources ◽  
Distribution Data ◽  
Source Water ◽  
Impact Model ◽  
Water Impact ◽  
Potable Reuse ◽  
The Impact

The scope of this study was to develop a model to assess the impact of source water quality on reclaimed water used for indirect potable reuse. The source water impact model (SWIM) considered source water qualities, water supply distribution data, water use and the impact of wastewater treatment to calculate reclaimed water quality. It was applied for sulfate, chloride, and dissolved organic carbon (DOC) at four water reuse sites in Arizona and California. SWIM was able to differentiate between the amount of salts derived by drinking water sources and the amount added by consumers. At all sites, the magnitude of organic residuals in reclaimed water was strongly effected by the concentration of organics in corresponding water sources and effluent-derived organic matter. SWIM can be used as a tool to predict reclaimed water quality in existing or planned water reuse systems.

Influencing factors and determinants of health literacy

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
L Grillich ◽  
E Kostial
Keyword(s):  
Health Literacy ◽  
Influencing Factors ◽  
Impact Model ◽  
Umbrella Review ◽  
Scoping Reviews ◽  
Individual Determinants ◽  
Health Target ◽  
Health Promoting ◽  
The Individual ◽  
The Impact

Abstract Health literacy has demonstrable effects on health status and quality of life and is a prerequisite for health-promoting behavior. Thus, health literacy is naturally an Austrian health target. Actions to strengthen health literacy should specifically address its determinants and influencing factors. To provide the best available knowledge for this goal, we developed an impact model of how influencing factors (indirect influence) and determinants (direct influence) will lead to increased health literacy based on the best available evidence We conducted an umbrella review on systematic, narrative and scoping reviews that deal with concepts, models or definitions of health literacy. The systematic literature search in MEDLINE (Ovid/Epistemonikos) identified 256 relevant abstracts. Two authors checked the abstracts and included 32 in the full text assessment. Fourteen studies were ultimately included in the umbrella review. We extracted influencing factors, determinants, and outcomes and coded, summarized, and renamed them in an inductive approach to ensure uniform terminology. In total, we identified 10 specific influencing factors and 13 measurable determinants. A graphical impact model visualizes the causal relationships between influencing factors and determinants and how they affect the main dimensions of health literacy together: decision, appraisal, access & seek. The impact model illustrates that health literacy is prevalent when decisions are made and implemented and that strengthening health literacy is best achieved through approaches that influence the determinants at the individual and situational level. With the list of specific influencing factors and measurable determinants, the impact model presented differs from all health literacy models available to date. The impact model gives clear recommendations on which concrete influencing factors and determinants programs for strengthening health literacy should be used to aim for positive changes. Key messages Interventions to strengthen health literacy should aim to improve both situational and individual determinants. A key situational determinant is the availability of accessible, understandable and reliable health information.

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