As Estruturas Elementares do Parentesco, de Claude Lévi-Strauss

Tradução do texto “Les Structures Élémentaires de la Parenté, par Claude Lévi-Strauss”. publicado originalmente na revista Les Temps Modernes, em 1949

It's OK not to be OK: Shared Reflections from two PhD Parents in a Time of Pandemic

Adopting an intersectional feminist lens, we explore our identities as single and co‐parents thrust into the new reality of the UK COVID‐19 lockdown. As two PhD students, we present shared reflections on our intersectional and divergent experiences of parenting and our attempts to protect our work and families during a pandemic. We reflect on the social constructions of ‘masculinities’ and ‘emphasized femininities’ as complicated influence on our roles as parents. Finally, we highlight the importance of time and self‐care as ways of managing our shared realities during this uncertain period. Through sharing reflections, we became closer friends in mutual appreciation and solidarity as we learned about each other’s struggles and vulnerabilities

Tourism and Pilgrimage: Paying Homage to Literary Heroes

By exploring the experiences of visiting the grave of famous authors, this study highlights the place of literary tourism in the tourism pilgrimage literature. It is based on an observational study of visitors to the grave of Jean-Paul Sartre and Simone de Beauvoir in Paris. Analysis reveals that visitors were motivated by a desire for closeness, a wish to pay their respects and to acknowledge the influence on their life of the two writers. The study notes a strong parallel between the religious and the literary pilgrim, and contributes to knowledge on the phenomenon of the secular pilgrimage

«Jusqu’à nos désirs, jusqu’aux formes de notre plaisir»: feminism’s development in Les Temps modernes

Les Temps Modernes has been a basic ground for the growth both of the second-wave feminism and of the third-wave one, and has skaken old roles also by questioning traditional longings, as some writings we can (re)read here show: several remarks by Simone de Beauvoir, an article by Colette Audry, an issue of the column Le Sexisme ordinaire.Les Temps Modernes ha offerto sia al femminismo dell’emancipazione sia a quello della differenza un fondamentale terreno di crescita, e ha scosso gli antichi ruoli rimettendo in discussione i desideri tradizionali; come mostrano gli scritti che possiamo (ri)leggere qui: alcune riflessioni di Simone de Beauvoir, un articolo di Colette Audry, un numero della rubrica Le Sexisme ordinaire

Optical frequency measurement of the 1S-3S two-photon transition in hydrogen

This article reports the first optical frequency measurement of the $1\mathrm{S}-3\mathrm{S}$ transition in hydrogen. The excitation of this transition occurs at a wavelength of 205 nm which is obtained with two frequency doubling stages of a titanium sapphire laser at 820 nm. Its frequency is measured with an optical frequency comb. The second-order Doppler effect is evaluated from the observation of the motional Stark effect due to a transverse magnetic field perpendicular to the atomic beam. The measured value of the $1\mathrm{S}_{1/2}(F=1)-3\mathrm{S}_{1/2}(F=1)$ frequency splitting is $2 922 742 936.729 (13) \mathrm{MHz}$ with a relative uncertainty of $4.5\times10^{-12}$. After the measurement of the $1\mathrm{S}-2\mathrm{S}$ frequency, this result is the most precise of the optical frequencies in hydrogen

QED confronts the radius of the proton

Recent results on muonic hydrogen [1] and the ones compiled by CODATA on ordinary hydrogen and $ep$-scattering [2] are $5\sigma$ away from each other. Two reasons justify a further look at this subject: 1) One of the approximations used in [1] is not valid for muonic hydrogen. This amounts to a shift of the proton's radius by $\sim 3$ of the standard deviations of [1], in the "right" direction of data-reconciliation. In field-theory terms, the error is a mismatch of renormalization scales. Once corrected, the proton radius "runs", much as the QCD coupling "constant" does. 2) The result of [1] requires a choice of the "third Zemach moment". Its published independent determination is based on an analysis with a $p$-value --the probability of obtaining data with equal or lesser agreement with the adopted (fit form-factor) hypothesis-- of $3.92\times 10^{-12}$. In this sense, this quantity is not empirically known. Its value would regulate the level of "tension" between muonic- and ordinary-hydrogen results, currently {\it at most} $\sim 4\sigma$. There is no tension between the results of [1] and the proton radius determined with help of the analyticity of its form factors.Comment: Extended for publication in Physics Letter

Hoy Julien Sorel sería una mujer

Sentada en un bar, mientras Simone de Beauvoir lee mi artículo de la semana pasada, la miro. Ninguna madre burguesa tendría de qué quejarse: la señora Beauvoir tiene una blusa cuidadosamente planchada; está fresca como una rosa, su rostro es terso y limpio, de ella emana un discreto perfume, es verdaderamente perfecta. Su rebelión contra su familia y su entorno, tan bien descrita en las Memorias de una joven formal, no se muestra en los detalles de la vestimenta. No, definitivamente, Simone de Beauvoir no tiene la agresividad "amazónica" al límite

Translucent γ-AlOOH and γ-Al2O3 glass-ceramics using the cold sintering process

Cold Sintering Process has been applied to hydroxide precursors Al(OH) 3 , xH 2 O to promote in situ reactive sintering. The application of sintering temperatures < 400 °C led to the release of OH groups and partial crystallization into boehmite γ-AlOOH. This latter step is accompanied by a densification stage leading to the production of dense translucent pellet. From skeletal density measurements, it appears that not all the pellet is composed of crystalline phase, but contains a mix of amorphous and crystalline phase. The presence of amorphous phase seems to favor the mechanical stability of the samples made of the inter- mediate boehmite phase, which is brittle due to its oriented layer structure. Further heat treatment in an oven at 500 °C induces the transformation of boehmite into γ-Al 2 O 3 . Here we demonstrate the possibility to produce optically translucent ceramics of low temperature stability gamma alumina structure