: Espaces d'interlocution et énonciation du tort

International audiencePlan de l'article : 1. Prise de parole et espace public2. Espaces du texte caché3. Dire le tort4. Parole pris

Sans-papiers : d’un quotidien tactique à l’action collective

« Tu sais le combat, il commence, dès que tu es vivant là. Dès que tu es mis dans le monde, c’est un combat. Que c’est en Afrique, en Europe, c’est un combat à mener. »Bakari, « Oublié de St-Paul » Le « choix du petit » peut s’entendre de deux manières. La première renvoie au choix de l’analyste produisant un discours sur le social : faire le choix du petit c’est choisir son camp. Dans le champ de la sociologie, c’est ranger au placard ses velléités de surplomb et prendre le point de vue de c..

Gambaran Tingkat Kecemasan Mahasiswa Fakultas Kedokteran UKI Angkatan 2021 Selama Pembelajaran Daring Di Masa Pandemi Covid-19

Situasi pandemi Covid-19 menjadi permasalahan yang berdampak pada kebijakan pemerintah Indonesia untuk menerapkan pembelajaran daring atau jarak jauh. Peralihan menjadi mahasiswa di perguruan tinggi dari siswa SMA memerlukan proses penyesuaian diri dengan situasi baru dalam perkuliahan. Keberhasilan mahasiswa baru dalam menjalankan proses penyesuaian diri berpengaruh terhadap performa dan prestasi mahasiswa dalam menjalani masa pendidikan. Mahasiswa baru yang tidak dapat menyesuaikan diri dengan kehidupan akademik cenderung rentan mengalami masalah psikologis yaitu kecemasan. Tujuan dari penelitian ini adalah untuk mendeskripsikan tingkat kecemasan mahasiswa Fakultas Kedokteran saat belajar online pada masa wabah Covid-19 di ruang kelas UKI angkatan 2021. Penelitian ini merupakan penelitian lanjutan dengan menggunakan penelitian deskriptif observasional dan pendekatan cross-sectional. Penelitian ini dilakukan di Fakultas Kedokteran UKI antara bulan November hingga Desember 2021. Hasil penelitian ini menggunakan Zung Self-Rating Anxiety Scale (ZSAS). Metode pengambilan sampel yang digunakan adalah sampling total dengan jumlah 138 responden. Hasil penelitian menunjukkan bahwa tingkat kecemasan mahasiswa baru Fakultas Kedokteran UKI memiliki tingkat kecemasan ringan sebesar 89,13%, tingkat kecemasan sedang sebesar 10,15%, dan tingkat kecemasan berat sebesar 0,72%. Dapat disimpulkan bahwa sebagian besar mahasiswa tahun pertama Fakultas Kedokteran UKI merasakan beberapa tingkat kecemasan, yang paling banyak yaitu kecemasan ringan saat kelas online selama wabah Covid-19./ The situation of pandemic Covid-19 became a problem resulting in the Indonesian government to implement the policies of online or distance learning. The transition of being a college student from a senior high school student requires an adjustment process to the new situations in the lectures. The succession of the new students in implementing an adjustment process results in their performance and achievement during the education period. The new students that cannot adjust themselves in the transition process of the academic life leads to being vulnerable and resulting in a psychological problem named anxiety. The purpose of this study is to describe the level of anxiety of students of the Faculty of Medicine when studying online during the Covid-19 outbreak in the classrooms of the University of Christian Indonesia class of 2021. This research is a follow-up study using observational descriptive research and a cross-sectional approach. This research was conducted at the Faculty of Medicine, University of Christian Indonesia between November and December 2021. The results of this study using Zung Self-Rating Anxiety Scale (ZSAS). The sampling method used is a total sampling with a total of 138 respondents. The results showed that the anxiety level of new students of the Faculty of Medicine, University of Christian Indonesia had a mild anxiety level of 89.13%, a moderate anxiety level of 10.15%, and a severe anxiety level of 0.72%. It can be concluded that most first-year students of the Faculty of Medicine, University of Christian Indonesia feel some level of anxiety, most of which is mild anxiety during online classes during the Covid-19 outbreak

QSOs and Absorption Line Systems Surrounding the Hubble Deep Field

We have imaged a 45x45 sq. arcmin. area centered on the Hubble Deep Field (HDF) in UBVRI passbands, down to respective limiting magnitudes of approximately 21.5, 22.5, 22.2, 22.2, and 21.2. The principal goals of the survey are to identify QSOs and to map structure traced by luminous galaxies and QSO absorption line systems in a wide volume containing the HDF. We have selected QSO candidates from color space, and identified 4 QSOs and 2 narrow emission-line galaxies (NELGs) which have not previously been discovered, bringing the total number of known QSOs in the area to 19. The bright z=1.305 QSO only 12 arcmin. away from the HDF raises the northern HDF to nearly the same status as the HDF-S, which was selected to be proximate to a bright QSO. About half of the QSO candidates remain for spectroscopic verification. Absorption line spectroscopy has been obtained for 3 bright QSOs in the field, using the Keck 10m, ARC 3.5m, and MDM 2.4m telescopes. Five heavy-element absorption line systems have been identified, 4 of which overlap the well-explored redshift range covered by deep galaxy redshift surveys towards the HDF. The two absorbers at z=0.5565 and z=0.5621 occur at the same redshift as the second most populated redshift peak in the galaxy distribution, but each is more than 7Mpc/h (comoving, Omega_M=1, Omega_L=0) away from the HDF line of sight in the transverse dimension. This supports more indirect evidence that the galaxy redshift peaks are contained within large sheet-like structures which traverse the HDF, and may be precursors to large-scale ``pancake'' structures seen in the present-day galaxy distribution.Comment: 36 pages, including 9 figures and 8 tables. Accepted for publication in the Astronomical Journa

Pensar um sucesso alternativo na universidade – Reclassificar experiências de professores e de estudantes com base na auto-socioanálise

Este artigo oferece uma análise reflexiva sobre uma experiência coletiva de ensino realizada no âmbito de um sistema de apoio ao sucesso da universidade (um curso destinado a ser dedicado à “expressão escrita e oral”), dentro do departamento de sociologia da universidade de Nantes entre 2016 e 2019. O curso está centralizado na realização, pelos alunos, de uma autoanálise socioeconômica. O artigo analisa essa experiência como um « sucesso » educacional relativo, indo além do significado institucional do termo para defini-lo de maneira subjetiva e decompor suas manifestações. Se, em relação aos indicadores institucionais, este exercício e seu impacto são mínimos, destacamos como professores e alunos o adotam e investem. As fontes desse sucesso revelam processos de requalificação das experiências de ensino e aluno e sua relação com a universidade.Palavras-chave: Práticas de ensino. Condições de trabalho. Sucesso acadêmico. Relacionamento com a universidade.

A Bayesian analysis of the 27 highest energy cosmic rays detected by the Pierre Auger Observatory

It is possible that ultra-high energy cosmic rays (UHECRs) are generated by active galactic nuclei (AGNs), but there is currently no conclusive evidence for this hypothesis. Several reports of correlations between the arrival directions of UHECRs and the positions of nearby AGNs have been made, the strongest detection coming from a sample of 27 UHECRs detected by the Pierre Auger Observatory (PAO). However, the PAO results were based on a statistical methodology that not only ignored some relevant information (most obviously the UHECR arrival energies but also some of the information in the arrival directions) but also involved some problematic fine-tuning of the correlation parameters. Here we present a fully Bayesian analysis of the PAO data (collected before 2007 September), which makes use of more of the available information, and find that a fraction F_AGN = 0.15^(+0.10)_(-0.07) of the UHECRs originate from known AGNs in the Veron-Cetty & Veron (VCV) catalogue. The hypothesis that all the UHECRs come from VCV AGNs is ruled out, although there remains a small possibility that the PAO-AGN correlation is coincidental (F_AGN = 0.15 is 200 times as probable as F_AGN = 0.00).Comment: MNRAS, accepted; 8 pages, 7 figure

Double-Peaked Broad Emission Lines in NGC 4450 and Other LINERs

Spectra taken with HST reveal that NGC 4450 emits Balmer emission lines with displaced double peaks and extremely high-velocity wings. This characteristic line profile, previously seen in a few nearby LINERs and in a small fraction of broad-line radio galaxies, can be interpreted as a kinematic signature of a relativistic accretion disk. We can reproduce the observed profile with a model for a disk with a radial range of 1000-2000 gravitational radii and inclined by 27 degrees along the line of sight. The small-aperture HST data also allow us to detect, for the first time, the featureless continuum at optical wavelengths in NGC 4450; the nonstellar nucleus is intrinsically very faint, with M_B = -11.2 mag for D = 16.8 Mpc. We have examined the multiwavelength properties of NGC 4450 collectively with those of other low-luminosity active nuclei which possess double-peaked broad lines and find a number of common features. These objects are all classified spectroscopically as "type 1" LINERs or closely related objects. The nuclear luminosities are low, both in absolute terms and relative to the Eddington rates. All of them have compact radio cores, whose strength relative to the optical nuclear emission places them in the league of radio-loud active nuclei. The broad-band spectral energy distributions of these sources are most notable for their deficit of ultraviolet emission compared to those observed in luminous Seyfert 1 nuclei and quasars. The double-peaked broad-line radio galaxies Arp 102B and Pictor A have very similar attributes. We discuss how these characteristics can be understood in the context of advection-dominated accretion onto massive black holes.Comment: To appear in The Astrophysical Journal. Latex, 15 pages, embedded figures and tabl

The utility of age-specific cut-offs for visual rating of medial temporal atrophy in classifying Alzheimer\u27s disease, MCI and cognitively normal elderly subjects

Background: New research criteria for diagnosing Alzheimer\u27s disease (AD) in the mild cognitive impairment stage (MCI-AD) incorporate biomarkers to assign a level of certainty to the diagnosis. Structural MRI is widely available but greatly under-utilized for assessing atrophy of structures affected in early AD, such as the hippocampus (HP), because the quantification of HP volumes (HP-v) requires special expertise, and normative values have not been established. Methods: Elderly subjects (n = 273) from the Florida ADRC were classified as having no cognitive impairment (cognitively normal, CN), amnestic mild cognitive impairment (aMCI) or AD. Volumes for the hippocampus (HP-v) were measured on structural MRI scans. A validated visual rating system for measuring medial temporal atrophy (VRS-MTA), including hippocampal, entorhinal cortex and perirhinal cortex atrophy was employed. The participants were subdivided into younger (less than or equal to 75 years of age) and older (greater than 75 years of age) subgroups. Results: Volumetric and VRS-MTA measures were equivalent in predicting classification of CN vs. aMCI for older (area under the receiver operator curves [aROC]: 0.652 vs. 0.723) and younger subjects (aROC: 0.764 vs. 0.736). However, for younger AD subjects, aROC values were significantly higher for VRS-MTA measures (0.920) than for volumetric measures (0.847). Relative to HP-v, VRS-MTA score was significantly more correlated to impairment on a range of memory tests and was more associated with progression of aMCI to AD than HP-v. Conclusion: Structural MRI with VRS-MTA assessment can serve as a biomarker for supporting the diagnosis of MCI-AD. Age-adjusted VRS-MTA scores are at least as effective as HP-v for distinguishing aMCI and AD from CN and for predicting progression from aMCI to AD. VRS-MTA is convenient for use in the clinic as well as for clinical trials and can readily be incorporated into a standardized radiological report

Nutrient uptake dynamics of Gloriosa for cut flower

Gloriosa superba L. is a recently introduced tropical species in Argentina, cultivated as a cut flower. It is extremely important to know the nutritional demands of the crop to provide the optimal amounts of nutrients at each stage, achieving quality and good yield in flowers, reducing production costs and environmental impact. The objective of this work was to determine the dynamics of nutrient absorption in the cultivation of G. superba for cut flowers, to facilitate the creation of a fertilization program, in order to avoid crop deficiencies and contribute to sustainable production. Tuber composition analyzes were carried out and, on the other hand, an essay was installed in greenhouse beds, taking samples at seven moments of the cycle. Fresh matter and dry matter of stems, leaves, flowers, tubers, roots and chemical analysis of aerial organs were measured to obtain the absorption curve. It was verified that only around 20% of each nutrient is provided by the tuber, being necessary the external contribution from initial stages of the crop. The rate of growth and accumulation of dry matter was shown as a double sigmoid, with maximum peaks      in the vegetative stage of stem elongation and beginning of flowering. Nutrient amounts were absorbed in the following order: N>K>Mg>Ca>P>Fe>Mn>Zn>Cu. Fertilization rich in N, P, and Fe is recommended in the vegetative stage, balanced during the visible shoot stage, and rich in Ca, K, Mg, Mn, Zn, and Cu during flowering

Optical and Near-IR Imaging of Ultra Steep Spectrum Radio Sources - The K-z diagram of radio and optically selected galaxies

We present optical and/or near-IR images of 128 ultra steep spectrum (USS) radio sources. Roughly half of the objects are identified in the optical images (R 94% are detected at K<~ 22. The mean K-magnitude is K=19.26 within a 2" diameter aperture. The distribution of R-K colors indicates that at least 1/3 of the objects observed have very red colors (R-K>5). The major axes of the identifications in K-band are preferentially oriented along the radio axes, with half of them having compact morphologies. The 22 sources with spectroscopic redshifts and K-band magnitudes follow the K-z relation found from previous radio samples, but with a larger scatter. We argue that this may be due to a dependence of K-magnitude on the radio power, with the highest radio power sources inhabiting the most massive host galaxies. We present a composite K-z diagram of radio-loud and radio-quiet galaxies, selected from the HDF-North and the Hawaii surveys. Out to z <~ 1, the radio-loud galaxies trace the bright envelope of the radio quiet galaxies, while at z >~ 1, the radio-loud galaxies are >~ 2 magnitudes brighter. We argue that this is not due to a contribution from the AGN or emission lines. This difference strongly suggests that radio galaxies pinpoint the most massive systems out to the highest known redshifts, probably due to the mutual correlation of the mass of the galaxy and the radio power on the mass of the central black hole.Comment: 39 Pages, including 10 PostScript figures. Accepted for publication in the January 2002 Astronomical Journal. Figures 2 and 12 are available from http://www.strw.leidenuniv.nl/~debreuck/paper