Manhattan Project | EPFL Graph Search

The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with support from the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. The nuclear physicist J. Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the bombs. The Army component was designated the Manhattan District, as its first headquarters were in Manhattan; the name gradually superseded the official codename, Development of Substitute Materials, for the entire project. The project absorbed its earlier British counterpart, Tube Alloys. The Manhattan Project began modestly in 1939, but employed nearly 130,000 people at its peak and cost nearly US

2&nbsp;billion (equivalent to about

billion in ). Over 90 percent of the cost was for building factories and to produce fissile material, with less th

CROCUS Concrete Activation Study by γ-ray Spectrometry and TLD Neutron Flux Measurements

Isabelle Tanseri

The semester project was under the course Physics lab IVb at EPFL. At EPFL site, the experimental fission reactor CROCUS is shielded by concrete which becomes radioactive as a result of neutron interaction. The activation is of interest to study for validation of models and cal- culations, and to quantify the amount of radioactive waste when the reactor will be recycled. In this project, measurements on concrete ac- tivation by NaI- and HPGe-detectors were performed on an in-cavity concrete block, together with TLD measurements on neutron flux in- side the core of CROCUS and in the cavity. The concrete activation and neutron flux allows for comparison and validation of models. The in-cavity concrete block had a low activation, trace elements of 60Co and 65Zn seem to be existing. The relative flux was the highest for structures close to the core and at the ceiling. In future projects, more experimental data on both concrete activation and neutron flux would be performed to acquire uncertainty estimations and correction factors.

2017

Interface maritime. Un marché alimentaire public entre quais et rails (Ouest new-yorkais, Etats-Unis, USA)

Alexandra Ménard

Manhattan a opté depuis longtemps pour le mode de vie citadin et la densité. Seules les régions périphériques peuvent actuellement faire basculer l'orientation générale de l'aire urbaine: vers une ville rassemblée ou vers un urbain fragmenté? A Bayonne, un site attend aujourd'hui de connaître son sort, à 15 km seulement du centre de New York. L'extrémité Sud d'une péninsule. La ressemblance à Manhattan s'arrête là. Vaste et vide, adossé à des friches industrielles au Nord et à quelques parcelles résidentielles, ce site offre des vues spectaculaires sur les grues portuaires et les activités maritimes des ports de Staten Island, d' Elizabeth et de Newark. Un potentiel qui n'est pas voué à rester inexploité. La ligne de Light Rail en provenance de Hoboken, carrefour directement relié au centre ville new-yorkais, va bientôt s'étendre jusqu'à la pointe de la péninsule. Terminus auquel nous nous proposons d'ajouter un terminal de ferries. De la bonne connexion entre ces deux modes de transports dépendra la fin de l'isolement dont souffre actuellement le site. Le projet consistera donc en un élément connecteur (entre la station de Light Rail et le terminal de ferries) marqué par une linéarité forte. Mais cette densification des transports ne suffira pas. Il faudra l'accompagner d'une densification des activités. Le projet se propose par conséquent de combiner à cette nouvelle interface de transports un marché public. Ce programme n'est pas choisi au hasard. Toutes les activités liées à la livraison, au stockage, à la distribution et à la consommation de la nourriture, souvent dissociées, cohabiteront ici, réduisant ainsi considérablement les problèmes liés au transport de biens sur de longues distances. De plus, l'activité de fret par cargos permettra au site de renouer avec ses origines industrielles passées.

2009

The Scikit HEP Project - overview and prospects

Pratyush Das

Scikit-HEP is a community-driven and community-oriented project with the goal of providing an ecosystem for particle physics data analysis in Python. Scikit-HEP is a toolset of approximately twenty packages and a few "a ffiliated" packages. It expands the typical Python data analysis tools for particle physicists. Each package focuses on a particular topic, and interacts with other packages in the toolset, where appropriate. Most of the packages are easy to install in many environments; much work has been done this year to provide binary "wheels" on PyPI and conda-forge packages. The Scikit-HEP project has been gaining interest and momentum, by building a user and developer community engaging collaboration across experiments. Some of the packages are being used by other communities, including the astroparticle physics community. An overview of the overall project and toolset will be presented, as well as a vision for development and sustainability.

E D P SCIENCES2020

Interface maritime. Un marché alimentaire public entre quais et rails (Ouest new-yorkais, Etats-Unis, USA)

Alexandra Ménard

2009