Three-dimensional planar object tracking with sub-pixel accuracy

Subpixel techniques are commonly used to increase the spatial resolution in tracking tasks. Object tracking with targets of known shape permits obtaining information about object position and orientation in the three-dimensional space. A proper selection of the target shape allows us to determine its position inside a plane and its angular and azimuthal orientation under certain limits. Our proposal is demonstrated both numerical and experimentally and provides an increase the accuracy of more than one order of magnitude compared to the nominal resolution of the sensor. The experiment has been performed with a high-speed camera, which simultaneously provides high spatial and temporal resolution, so it may be interesting for some applications where this kind of targets can be attached, such as vibration monitoring and structural analysis.

Uso de Internet y prácticas políticas de los jóvenes españoles

A partir de un análisis secundario de los microdatos procedentes del estudio 2.889 del Centro de Investigaciones Sociológicas de España, pretendemos observar la posible relación entre el uso de Internet por parte de los jóvenes y sus prácticas políticas. En concreto, las variables disponibles permiten estudiar tres aspectos fundamentales: si existe relación entre la frecuencia de uso de Internet y la participación política; si el grado de participación política en el espacio virtual se correlaciona con la participación fuera de este espacio; y si se observan diferencias en términos de participación política online según variables sociodemográficas. Entre los resultados obtenidos podemos destacar la existencia de una relación estadísticamente significativa entre una mayor frecuencia de uso de Internet y una mayor implicación política tanto en el espacio virtual como offline.

Visions of the Spanish Revolution: identities and conflicts in post-welfare societies

This is a case study that analyzes photographic documents of the social protest in Spain between 2011 and 2013. The analysis is qualitative and considers the use of space, the visual expression of the messages and the orientation toward the causes or effects of political, economic and social changes. Visual sociology allows us to appreciate, in the case of the Spanish Revolution, a dynamic of “reflexivity” unrecognizable from other research approaches. Two successive waves of social mobilization in response to two different shocks can be appreciated. The first is given by political corruption, unemployment and the threat to consumer society. The second shock is caused by the savage cuts in the Welfare State. Social mobilization is expressed differently in each phase, and the forms taken by the protests show how the class structure in post industrial society shapes the reactions to the crisis of the Welfare State.

Description of two cryptic species of Anomala Samouelle (Coleoptera: Scarabaeidae: Rutelinae) from Costa Rica

Two new species of Anomala Samouelle from Costa Rica are described: Anomala moroni new species and A. parvaeucoma new species. Habitus, protibia, distribution map, and male genitalia (aedeagus and endophallus) of each species are illustrated. A key for the dorsally setose species from the Neotropical region is provided.

Discursos interculturales y prácticas asimilacionistas: algunas contradicciones en el sistema educativo español

En este artículo se analiza el grado de coherencia entre el discurso legal, teórico y formal acerca de la gestión de la diversidad y la realidad de las prácticas pedagógicas en las instituciones educativas formales. Con este fin se aborda una revisión teórica de las distintas leyes educativas, de los discursos del profesorado y de las prácticas pedagógicas a partir de investigaciones precedentes. El principal resultado apunta a la existencia de algunas contradicciones: el concepto de asimilación cultural al mismo tiempo que se desprecia, tanto en la legislación educativa como en el discurso explícito y consciente del profesorado, acaba siendo el adoptado en la mayoría de las prácticas educativas. Este hallazgo conduce a algunas conclusiones respecto a la necesidad de repensar y redefinir el concepto de asimilación cultural desde la perspectiva de la igualdad y de una concepción crítica de la etnicidad y de la identidad.

Gulistān : manuscript, 1727?

Written in one column (in black and red ink) and two columns (in red ink), 29 lines per page.

Kitāb Sharḥ Burdat al-mukhtār / lil-Shaykh al-Imām al-ʻĀlim al-ʻĀmil Shihāb al-Dīn Abū al-ʻAbbās Aḥmad ibn ʻImād al-Dīn ʻAbd al-Bāqī al-Aqfahsī : manuscript, 1635

Written in one column, 17 lines per page, in black with punctuation in red.

Kitāb Fatḥ al-jawād bi-sharḥ Manẓūmat Ibn al-ʻImād / taṣnīf al-Shaykh al-Imām al-ʻĀlim al-ʻAllāmah shaykhinā wa-mawlānā Abū al-ʻAbbās al-Shihāb Aḥmad al-Ramlī al-Anṣārī al-Khazrajī : manuscript, 1542

بسم الله الرحمن الرحيم الحمد لله الذي بعث محمد صلى الله عليه وسلم رحمة للعالمين ... :Incipit

Bayān al-najāsāt al-maʻfū ʻanhā / li-Ibn al-ʻImād : manuscript, 1885

Title from f. 1r in later hand.

Risālah : manuscript, [ca. 1918]

Title supplied by cataloger.

Hādhihi risālat Tanbīh al-muhtadīn ʻalá dasāʼis al-muʻtadīn / li-muʻallifihi al-ʻAllāmah al-Humām Dhū al-Qadr al-Aʻdal al-Sayyid Muḥammad [ibn] Muḥammad ibn ʻAbd al-Qādir al-Ahdal : manuscript, 1918

Copy completed 15 Jumādá al-Thānī 1336 [March 28, 1918] in the hand of Muḥammad ʻAbd al-Jalīl, from a copy dated 22 Ṣafar 1323 [April 27, 1905].

Fatḥ al-Raḥmān bi-al-jawāb ʻalá ahl Qalībān / jamʻ al-Shaykh al-ʻAllāmah wa-al-Sayyid al-Fahhāmah ʻAbd Allāh ibn ʻUmar ibn Yaḥyá Bāʻalawī : manuscript, 1918

Written in 1248 [1832-3].

Hādhā kitāb sammāhu muʼallifuhu Natāʼij al-fiṭan fī ibrāz faḍāʼil al-Yaman / wa-al-muʼallif al-Shaykh Muḥammad ibn Muḥammad al-Shīrāzī al-Zabīdī : manuscript, 1918

Copy completed on 16 Jumād[á] al-Thānī 1336 [March 29, 1918] from a copy dated 16 Rabīʻ al-Awwal 1323 [May 21, 1905].

Dissolved organic carbon in sediments of the central Arctic Ocean collected during POLARSTERN cruise ARK-XXVII/3 from August-September 2012

Marine organic matter (OM) sinks from surface waters to the seafloor via the biological pump. Benthic communities, which use this sedimented OM as energy and carbon source, produce dissolved organic matter (DOM) in the process of remineralization, enriching the sediment porewater with fresh DOM compounds. We hypothesized that in the oligotrophic deep Arctic basin the molecular signal of freshly deposited primary produced OM is restricted to the surface sediment pore waters which should differ from bottom water and deeper sediment pore water in DOM composition. This study focused on: 1) the molecular composition of the DOM in sediment pore waters of the deep Eurasian Arctic basins, 2) whether the signal of marine vs. terrigenous DOM is represented by different compounds preserved in the sediment pore waters and 3) whether there is any relation between Arctic Ocean ice cover and DOM composition. Molecular data, obtained via 15 Tesla Fourier transform ion cyclotron resonance mass spectrometer, were correlated with environmental parameters by partial least square analysis. The fresher marine detrital OM signal from surface waters was limited to pore waters from < 5 cm sediment depth. The productive ice margin stations showed higher abundances of peptides, unsaturated aliphatics and saturated fatty acids formulae, indicative of fresh OM/pigments deposition, compared to northernmost stations which had stronger aromatic signals. This study contributes to the understanding of the coupling between the Arctic Ocean productivity and its depositional regime, and how it will be altered in response to sea ice retreat and increasing river runoff.