Publications associées à Barrière à l'entrée

Predicting Changes in Depression Severity Using the PSYCHE-D (Prediction of Severity Change-Depression) Model Involving Person-Generated Health Data: Longitudinal Case-Control Observational Study

Background: In 2017, an estimated 17.3 million adults in the United States experienced at least one major depressive episode, with 35% of them not receiving any treatment. Underdiagnosis of depression has been attributed to many reasons, including stigma s ...

Jmir Publications, Inc2022

High energy barriers for edge dislocation motion in body-centered cubic high entropy alloys

William Curtin, Recep Ekin Kubilay, Francesco Maresca, Alireza Ghafarollahi

Recent theory proposes that edge dislocations in random body-centered cubic (BCC) high entropy alloys have high barriers for motion, conveying high strengths up to high temperatures. Here, the energy barriers for edge motion are computed for two model allo ...

NATURE RESEARCH2021

Inventory of Problems: The Genesis of the Rotterdam Kunsthal by OMA/Rem Koolhaas, 1987-1992

Tibor Bonaventura Pataky

The Kunsthal in Rotterdam is a key work in the oeuvre of OMA/Rem Koolhaas that marks the threshold between the firmâ s architectural production of the decades before and after 1990. This doctoral thesis aims at a deeper and comprehensive understanding of ...

EPFL2021

The Who, Where, What, How and When of Market Entry

Christopher Tucci

This introductory, along with the eight articles contained within this Special Issue, highlights and brings greater clarity to entrant-incumbent interactions and to firm movement - when entrants traverse market territories for the creation and/or delivery ...

WILEY2019

A demand-based optimization approach to find market equilibria in oligopolies

Stefano Bortolomiol

Oligopolistic competition occurs often in transportation as well as in other markets due to reasons such as barriers to entry, limited capacity of the infrastructure and external regulations. In transport oligopolies, suppliers are profit maximizers and ta ...

2019

Liquidity, Innovation, And Endogenous Growth

Semyon Malamud, Francesca Maria Zucchi

We build a model of endogenous, innovation-driven growth in which innovative firms have costly access to outside financing and hoard cash reserves to maintain financial flexibility. We show that financing frictions slow down Schumpeterian creative destruct ...

2019

Sparsified SGD with Memory

Martin Jaggi, Sebastian Urban Stich, Jean-Baptiste Francis Marie Juliette Cordonnier

Huge scale machine learning problems are nowadays tackled by distributed optimization algorithms, i.e. algorithms that leverage the compute power of many devices for training. The communication overhead is a key bottleneck that hinders perfect scalability. ...

2018

No money, no honey? Financial versus knowledge and demand constraints on innovation

Gabriele Pellegrino

The paper adds to the literature on the barriers to innovation in two ways. First, we assess comparatively what mostly constrains firms' ability to translate investment in innovation activity into new products and processes, whether it is mainly finance, a ...

Elsevier2017

The Economics of Sharing Markets

Maryam Razeghian Jahromi

Sharing and redistributing assets between individuals has become a noticeable part of the economy. Ownership is no longer the sole mode of consumption and consumers have the option of choosing between ownership and access-based consumption. This change in ...

EPFL2017

The Beacon: A New Framework for Business Model Reconfiguration for Complex Enterprises

Deep Ramnik Parekh

During the last twenty years we have witnessed the steady rise in academic research and practitioner interest and inquiry on the topic of business models. The topic is still in its infancy, and thus a lot of literature hitherto has focused on the basics: d ...

EPFL2016

Exploring barriers to climate change adaptation in the Swiss tourism sector

Philippe Thalmann, Cecilia Matasci

Increasingly, various sectors are affected by climate change and need to find ways to adapt with much public guidance and support. This paper examines the adaptation process of a sector that started it some time ago - Swiss Alpine tourism. It identifies ba ...

Springer Verlag2014

Escaping the Prior Knowledge Corridor: What shapes the Number and Variety of Market Opportunities identified before Market Entry of Technology Start-ups?

Marc Gruber, James David Thompson

The choice of the firm's market environment is one of the fundamental decisions of firm founders. We study the pre-entry generation of founders' market choice sets by investigating their search for market opportunities in which the firm's technological res ...

INFORMS2013

Simple buffers for 3D STORM microscopy

Pierre Gönczy, Suliana Manley, Debora Keller, Vinoth Edal Joseph Sundar Rajan

3D STORM is one of the leading methods for super-resolution imaging, with resolution down to 10 nm in the lateral direction, and 30-50 nm in the axial direction. However, there is one important requirement to perform this type of imaging: making dye molecu ...

Optical Soc Amer2013

Regulatory Institutions and Governance Costs : The Case of the Postal Sector

Martin Maegli

In recent decades, the European postal industry has undergone profound reforms, which aim to promote competition while simultaneously maintaining a high level of universal services for consumers. It is often put forth that market opening and the emergence ...

EPFL2012

'Technology, innovation and knowledge: An Asian perspective': Introduction

Christopher Tucci

Technology, knowledge and innovation play a crucial role in explaining the competitive potential of firms and countries in today’s globalised world. With lowered barriers to international activities, firms develop technological competencies abroad, either ...

2012

Three Essays on Navigating the Stages in New Venture Creation

Jana Thiel

Starting a new venture is arguably an exciting journey into previously unknown territories. Since entrepreneurs, through their economic activities, are central to social prosperity, academic research has a strong interest to understand who those entreprene ...

EPFL2012

Toward Dark Silicon in Servers

Anastasia Ailamaki, Babak Falsafi, Michael Ferdman

Server chips will not scale beyond a few tens to low hundreds of cores, and an increasing fraction of the chip in future technologies will be dark silicon that we cannot afford to power. Specialized multicore processors, however, can leverage the underutil ...

Institute of Electrical and Electronics Engineers2011

Intrinsic dynamics of weakly and strongly confined excitons in nonpolar nitride-based heterostructures

Benoît Marie Joseph Deveaud, Nicolas Grandjean, Jean-Daniel Ganière, Jacques Levrat, Pierre Michel Corfdir

Both weakly and strongly confined excitons are studied by time-resolved photoluminescence in a nonpolar nitride-based heterostructure grown by molecular beam epitaxy on the a-facet of a bulk GaN crystal, with an ultralow dislocation density of 2 × 105 cm-2 ...

2011

Light engineering of the polariton landscape in semiconductor microcavities

Romuald Houdré, Cristiano Ciuti

We demonstrate a method to create potential barriers with polarized light beams for polaritons in semiconductor microcavities. The form of the barriers is engineered via the real space shape of a focalized beam on the sample. Their height can be determined ...

2010

Self-assembled ordered mesoporous metals

Scott Charles Warren

Control over the structure of metals at the mesoscale (2-50 nm) is crucial for emerging applications such as energy conversion, sensing, and information processing. The self-assembly of nanoparticles with block copolymers provides a natural entry point to ...

2009