Search results for "processes"
showing 10 items of 3831 documents
Octave Spanning Supercontinuum in Titanium Dioxide Waveguides
2018
International audience; We report on the experimental generation of an octave-spanning supercontinuum in a 2.2 cm-long titanium dioxide optical waveguide with two zero dispersion wavelengths. The resulting on-chip supercontinuum reaches the visible wavelength range as well as the mid-infrared region by using a femtosecond fiber laser pump at 1.64 µm.
UV variability and accretion in NGC 2264
2015
Photometric variability is a distinctive feature of young stellar objects; exploring variability signatures at different wavelengths provides insight into the physical processes at work in these sources. We explore the variability signatures at ultraviolet (UV) and optical wavelengths for several hundred accreting and non-accreting members of the star-forming region NGC 2264 (~3Myr). Cone search capability for table J/A+A/581/A66/table2 (Median photometry, variability amplitudes, light curve rms, J index, and color slopes for members monitored at CFHT)
Shaping 1,2,4-Triazolium Fluorinated Ionic Liquid Crystals
2023
The synthesis and thermotropic behaviour of some di-alkyloxy-phenyl-1,2,4-triazolium trifluoromethane-sulfonate salts bearing a seven-carbon atom perfluoroalkyl chain on the cation is herein described. The fluorinated salts presenting a 1,2,4-triazole as a core and differing in the length of two alkyloxy chains on the phenyl ring demonstrated a typical liquid crystalline behaviour. The mesomorphic properties of this set of salts were studied by differential scanning calorimetry and polarized optical microscopy. The thermotropic properties are discussed on the grounds of the tuneable structures of the salts. The results showed the existence of a monotropic, columnar, liquid crystalline phase…
How physical activity, fitness, and motor skills contribute to math performance: Working memory as a mediating factor
2021
Purpose The purpose of this study was to examine whether physical activity, fitness and motor skills have indirect association with math performance via cognitive outcomes and if so, through which aspects of cognition? Methods This study comprised 311 6th–9th grade adolescents (12–17y [M age=14.0y], 59% girls) from seven schools throughout Finland in 2015. Math performance was measured via a teacher-rated math achievement and the Basic Arithmetic test. Cognitive functions were measured by broad cognitive test battery. Physical activity was assessed with a self-reported questionnaire and a hip-worn accelerometer. Aerobic fitness was estimated using a maximal 20-m shuttle run test, muscular f…
Hume’s Guillotine Resolved
2020
According to Hume’s guillotine, one cannot derive values from facts. Since intelligent systems are fact processors, one can ask how ethical machines can be possible. However, ethics is a real-life process. People analyze actions and situations emotionally and cognitively. Thus they learn rules, such as “this situation feels good/bad.” The cognitive analysis of actions is associated with emotional analysis. The association of action, emotion and cognition can be termed a primary ethical schema. Through an ethical information process in which emotions and cognitions interact in social discourse, primary ethical schemas are refined into ethical norms. Each component of the process is different…
Intranuclear dynamics in parvovirus infection
2009
The cumulative effect of positive and negative feedback on emotional experience
2021
The cumulative effect of positive or negative feedback on subsequent emotional experiences remains unclear. Elucidating this effect could help individuals to better understand and accept the change in emotional experience, irrespective of when they or others receive consecutive positive or negative feedback. This study aimed to examine this effect on 37 participants using self-reported pleasantness and event-related potential data as indicators. After completing each trial, the participants received predetermined false feedback; they were then assessed on a nine-point pleasantness scale. There were 12 false feedback conditions categorized into three valence types. The positive type consiste…
Loģistikas procesu pilnveidošanas iespējas starptautiskā uzņēmumā.
2016
Maģistra darbā tiek pētīta loģistikas procesu būtība, analizējot no dažādiem aspektiem, saistībā ar starptautiskās uzņēmējdarbības aktivitātēm. Uzsvars ir likts uz komunikācijas un informācijas aprites efektivitātes nozīmi loģistikas procesu organizēšanā, tādejādi veicinot uzņēmuma vadības procesu uzlabošanu un konkurētspējas paaugstināšanu. Galvenais pētījuma rezultātā gūtais secinājums ir izvirzītās hipotēzes apstiprinājums, ka loģistikas procesu uzlabošanu traucē komunikācijas problēmas un neefektīva informācijas aprite uzņēmumā, ko iespējams risināt izveidojot efektīvu informācijas plūsmu. Maģistra darbā veiktā analīze un pētījums tiek balstīts uz ārvalstu un vietējo zinātnieku darbiem,…
Cambio de percepción de los niños de preescolar sobre su ambiente, mediante una intervención educativa con enfoque local.
2015
La investigación se desarrolla con 300 infantes de doce centros escolares de preescolar en cinco comunidades aledañas a los Manglares y Humedales de Tuxpan. El objetivo fue determinar si una intervención educativa cambia la percepción sobre su medio. Se realiza un diagnóstico solicitando a los pequeños que elaboraran un dibujo bajo el título ¿Cómo es mi medio ambiente?. Se diseña e implementa una intervención educativa pertinente al contexto y alineada con el currículum Programa de Estudios 2011/ Preescolar, específicamente con el campo formativo de Exploración y Conocimiento del mundo, fomentando una actitud reflexiva sobre la importancia del aprovechamiento adecuado de los recursos natura…
OBSTÁCULOS AL APRENDIZAJE DEL CONCEPTO ESTRUCTURANTE EVOLUCIÓN BIOLÓGICA
2014
Se contrastaron los obstáculos en el aprendizaje del concepto evolución biológica reportados en publicaciones especializadas en la enseñanza de las ciencias, con losen la implementación de un juego para enseñar evolución por selección natural. Lo anterior, se realizó mediante la revisión de antecedentes que permitieron identificar los obstáculos encontrados por otros investigadores y la puesta en marcha de la propuesta didáctica que posibilitó identificar y superar algunos de los mismos. Existen múltiples factores que dificultan la comprensión de la evolución biológica, componentes culturales, iconografía inapropiada, insuficiente preparación de los profesores, estrategias didácticas inade…