Hyperspectral signatures and reflectance models related to the ripening index in four grape varieties

The preference for the consumption of red wine in Mexico is increasing because its components derived from the grape are attributed to health benefits. The quality of wine depends mostly on the vineyard conditions. The objective of this study was able to differentiate the physicochemical composition in the harvest stage of four varieties of red grapes that are used in the production of wine to relate their maturation with those of their hyperspectral signatures. Various parameters including pH, total soluble solids, color, weight, and morphology were determined from the bunches of grapes. Concerning the maturity index, it was observed that the grapes with the highest degree of maturity were Shiraz and Merlot at harvest time. The pH of grape juice is a measure of active acidity; the texture is considered a quick and inexpensive technique. The hyperspectral signatures reflectances versus color, total soluble solids, morphology, weight, texture, and pH for each grape variety was best fitted with Gaussian curves of order 8 to Cabernet sauvignon and Merlot, 7 to Malbec, and 5 to Shiraz with R2 above 0.99

Model for initiation of quality factor degradation at high accelerating fields in superconducting radio-frequency cavities

A model for the onset of the reduction in SRF cavity quality factor, the so-called Q-drop, at high accelerating electric fields is presented. Breakdown of the surface barrier against magnetic flux penetration at the cavity equator is considered to be the critical event that determines the onset of Q-drop. The worst case of triangular grooves with low field of first flux penetration Hp, as analyzed previously by Buzdin and Daumens, [1998 Physica C 294: 257], was adapted. This approach incorporates both the geometry of the groove and local contamination via the Ginzburg-Landau parameter kappa, so the proposed model allows new comparisons of one effect in relation to the other. The model predicts equivalent reduction of Hp when either roughness or contamination were varied alone, so smooth but dirty surfaces limit cavity performance about as much as rough but clean surfaces do. When in combination, contamination exacerbates the negative effects of roughness and vice-versa. To test the model with actual data, coupons were prepared by buffered chemical polishing and electropolishing, and stylus profilometry was used to obtain distributions of angles. From these data, curves for surface resistance generated by simple flux flow as a function of magnetic field were generated by integrating over the distribution of angles for reasonable values of kappa. This showed that combined effects of roughness and contamination indeed reduce the Q-drop onset field by ~30%, and that that contamination contributes to Q-drop as much as roughness. The latter point may be overlooked by SRF cavity research, since access to the cavity interior by spectroscopy tools is very difficult, whereas optical images have become commonplace. The model was extended to fit cavity test data, which indicated that reduction of the superconducting gap by contaminants may also play a role in Q-drop.Comment: 15 pages with 7 figure

L’educació sexual com a eina de transformació social. Anàlisi de la sexualitat que viuen avui en dia els i les joves de la generació Z

Curs 2021-2022La sexualitat és una dimensió de la persona present al llarg de la seva vida que encara es viu amb molt tabú. Hi ha molts aspectes que influencien l'imaginari social sobre la idea de sexualitat, el qual determina quines dinàmiques, gustos, interessos, desitjos, són correctes i quins no. Parlem d'una sexualitat normativa i homogènia que condiciona a moltes persones a viure la sexualitat d'una determinada manera i totes aquelles que surten fora de la norma en queden excloses i mal vistes. Avui en dia, tot i que encara és un tema tabú, ple d'estigmes per a la nostra societat, comença a sorgir un moviment que lluita per a poder generar espais, en els quals es pugui parlar de sexualitat sense pors i treballar cap a una sexualitat de l'autoconeixement, lliure i plaent. En aquest treball, es realitza una anàlisi de l'imaginari social al qual s'emmarca i es viu la sexualitat i quina influència té l'educació sexual sobre aquesta. Concretament com afecte les persones de la generació Z.Sexuality is a dimension of people that is very present in our lives, but at the same time it is lived with a lot of taboos. There are many aspects that influence the social imagination of the idea of sexuality, which determines which dynamics, feelings, interests, desires, are right and which are not. We tend to talk about a normative and homogeneous sexuality that leads to many people to live sexuality in a certain way and all those that are out of the norm are excluded and frowned upon. Today, although it is still a taboo subject full of stigmas for our society, a movement is beginning to emerge that struggles to be able to generate spaces in which we can talk about sexuality without fear and work towards a sexuality of self-knowledge which is free and pleasurable. In this project, the analysis is focus on the social imaginary in which sexuality is framed and lived and what influence sex education has on it. Specifically how it affects people in generation Z

Habitáculos: Empleo de los códigos QR como medio de creación de material educativo.

The use of QR codes as an educational support is a success in its planning and implementation in the classroom. For decades, teachers have used the notes and documents that are distributed in printed format to students as the main didactic resource that serves as support and auxiliary material. This information can be expanded through a QR code that will be a simpler process, because with only scanning it will access infinite content websites where you can find more information about the subject, audios, videos on specific platforms enabled for that purpose. The creation of a blog or a social network of the subject we teach, a platform to share all kinds of educational files. The results are accessible and bright, QR codes can substitute infinite amounts of information in a simple image, this allows us to respect the environment, we will not have to print huge amounts of notes and research documents on the specific topic. Students are also motivated through the use of technological tools that in turn capture their attention. The objective is achieved that the totality of the students participate through the vote of a common reference artist through QR codes, being agents involved in the teaching-learning process. Currently they are a resource that has not been fully strengthened but in the future more interesting initiatives will be developed through this tool.La utilización de los códigos QR como apoyo educativo es un éxito en su planificación e implementación en el aula. Desde hace décadas los profesores, han empleado como recurso didáctico principal que funciona como soporte y material auxiliar los apuntes y documentos que se distribuyen en formato impreso al alumnado. Esta información puede ser ampliada a través de un código QR que será un proceso más sencillo, pues con tan sólo escanearlo accederán a infinitos contenidos webs donde encontrar más datos sobre la materia, audios, vídeos en plataformas específicas habilitadas al efecto. La creación de un blog o una red social de la asignatura que impartimos, una plataforma donde compartir todo tipo de archivos educativos. Los resultados son accesibles y brillantes, los códigos QR pueden sustituir cantidades infinitas de información en una simple imagen, esto permite respetar el medio ambiente, ya no tendremos que imprimir enormes cantidades de apuntes y documentos de investigación sobre el tema específico. También los estudiantes se encuentran motivados a través del uso de herramientas tecnológicas que a su vez captan su atención. Se alcanza el objetivo de que la totalidad del alumnado participe mediante la votación de un artista referente común a través de códigos QR, siendo agentes implicados del proceso de enseñanza-aprendizaje . Actualmente son un recurso que no se ha potenciado plenamente pero en el futuro se desarrollarán más iniciativas interesantes a través de esta herramienta

Daily salivary cortisol levels in captive chimpanzees (Pan troglodytes) : a potential non-invasive welfare indicator

Jun

Biosensor proposal to detect vitamin C degradation in juice

PòsterJun