Ultrafast dynamics in metallic and semiconducting carbon nanotubes

Journal ArticleTransient polarized pump/probe transmission changes upon pulse photoexcitation at 1.6 eV were measured in chiral enriched carbon nanotubes ensembles of both metallic and semiconductor characters, in a very broad probe spectral range from mid-IR to visible, combining several ultrafast laser systems. We identify a photoinduced absorption band at ~0.7 eV as due to hot Dirac fermions in the metallic tubes and measure its dynamics. The hot carriers equilibrate within the electronic system in ~400 fs and with the lattice within ~2 ps; in agreement with hot Dirac fermions thermalization in graphene. We also assign excitonic transitions in the semiconducting tubes, mainly of (6,5) chirality; in particular, an intraexciton transition at ~0.4 eV represents a lower limit for the exciton binding energy

Perception of Sustainability Reporting – an Attempt by Means of Eye-Tracking

Financial reporting–going back to the work of the Croatian Benedikt Kotruljević in 1458 - has been significantly developed in recent years. Notwithstanding this, financial reporting is no longer perceived as comprehensive. Large public-interest preparers as well as their suppliers have been facing pressure in their reporting: Only financial reporting together with nonfinancial reporting on Corporate Social Responsibility (CSR) is said to achieve a comprehensive view of a company’s performance. Such reporting discloses amongst others social and environmental matters e.g. by means of a sustainability report. However, as there are different reporting types the goal of this paper is to identify the superior CSR reporting type from a stakeholder’s perspective. After identifying and analyzing central guidelines on CSR reporting and presenting different approaches, the authors will apply positive-empirical methodology by using Eye-Tracking technology. In this first innovative joint attempt for approaching CSR quality by Eye-Tracking technology students act as subjects in order to develop hypothesis for future research after feedback from conference participants. This work is licensed under a&nbsp;Creative Commons Attribution-NonCommercial 4.0 International License.</p

Welche Rolle spielt die Sprache für die Funktionen des Arbeitsgedächtnisses?

原著：リュアー, ゲァー　翻訳：中島,

Perception of Sustainability Reporting – an Attempt by Means of Eye-Tracking

Financial reporting–going back to the work of the Croatian Benedikt Kotruljević in 1458 - has been significantly developed in recent years. Notwithstanding this, financial reporting is no longer perceived as comprehensive. Large public-interest preparers as well as their suppliers have been facing pressure in their reporting: Only financial reporting together with nonfinancial reporting on Corporate Social Responsibility (CSR) is said to achieve a comprehensive view of a company’s performance. Such reporting discloses amongst others social and environmental matters e.g. by means of a sustainability report. However, as there are different reporting types the goal of this paper is to identify the superior CSR reporting type from a stakeholder’s perspective. After identifying and analyzing central guidelines on CSR reporting and presenting different approaches, the authors will apply positive-empirical methodology by using Eye-Tracking technology. In this first innovative joint attempt for approaching CSR quality by Eye-Tracking technology students act as subjects in order to develop hypothesis for future research after feedback from conference participants. This work is licensed under a&nbsp;Creative Commons Attribution-NonCommercial 4.0 International License.</p

Corporate Social Responsibility Reporting - a Stakeholder`s Perspective Approach

Background: International financial reporting standards have constantly been facing fast-growing significant development. This has mainly been driven by the aim of better serving the needs of the investors. Awareness that corporate financial reporting provides short-sighted information and measures has been rising among politicians, in the society and on the financial markets. Therefore, Corporate Social Responsibility (CSR) reporting as a form of non-financial reporting has made it to limelight. Various reporting types developed, but the type of reporting is hardly codified. Objective: The goal of this paper is to identify the superior CSR reporting type from a stakeholder\u27s perspective. After identifying and analyzing central guidelines on CSR reporting and presenting different approaches, the authors will apply a positive-empirical methodology. Methods/Approach: In this first innovative joint attempt, eye-tracking technology is combined with a questionnaire for approaching CSR quality. Results: This study demonstrates the validity of the used methodology for the analysis of search and information browsing behavior in various types of sustainability reports. Conclusions: Overall our findings indicate that the reporting type "reference sustainability report" may not be advisable from a stakeholder’s perspective

Automatic Onion Peeler

Our senior design report encompasses the design selection, process, and fabrication of an automatic onion peeler. Our design is intended for the peeling of medium yellow onions in restaurant-scale applications. Our machine is easily cleaned and can be safely operated by one person

The glandulous Specklinia: morphological convergence versus phylogenetic divergence

The present paper focuses on the systematics of the Specklinia glandulosa species complex. Traditionally, S. glandulosa has been considered a widely distributed and variable species, ranging from Mexico to the guiana Shield. Here it is treated as one of at least six different, albeit closely related, species. of these species, S. pertenuis and S. vittariifolia, are recognized as distinct species and removed from the synonymy of S. glandulosa, and S. alajuelensis and S. gersonii are described and il- lustrated as new to science. Specklinia chontalensis is described and illustrated from living, Costa rican material. Specklinia alajuelensis is compared with S. glandulosa and S. vittariifolia, from which it differs in its broader leaves, multi-flowered, lax inflorescence that surpasses the leaves, and smaller petals and sepals. Specklinia gersonii is compared with S. glandu- losa, from which it differs in the smaller leaves, and the smaller, orange flowers.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Jardín Botánico Lankester (JBL

Early life sensory ability—ventilatory responses of thornback ray embryos (Raja clavata) to predator-type electric fields

Predator avoidance is fundamental for survival and it can be particularly challenging for prey animals if physical movement away from a predatory threat is restricted. Many sharks and rays begin life within an egg capsule that is attached to the sea bed. The vulnerability of this sedentary life stage is exacerbated in skates (Rajidae) as the compulsory ventilatory activity of embryos makes them conspicuous to potential predators. Embryos can reduce this risk by mediating ventilatory activity if they detect the presence of a predator using an acute electrosense. To determine how early in embryonic life predator elicited behavioral responses can occur, the reactions of three different age groups (1/3 developed, 2/3 developed, and near hatching) of embryonic thornback rays Raja clavata were tested using predator-type electric field stimuli. Egg capsules were exposed to continuous or intermittent stimuli in order to assess varying predator-type encounter scenarios on the ventilatory behavior of different developmental stages. All embryos reacted with a “freeze response” following initial electric field (E-field) exposure, ceasing ventilatory behavior in response to predator presence, demonstrating electroreceptive functionality for the first time at the earliest possible stage in ontogeny. This ability coincided with the onset of egg ventilatory behavior and may represent an effective means to enhance survival. A continuous application of stimuli over time revealed that embryos can adapt their behavior and resume normal activity, whereas when presented intermittently, the E-field resulted in a significant reduction in overall ventilatory activity across all ages. Recovery from stimuli was significantly quicker in older embryos, potentially indicative of the trade-off between avoiding predation and adequate respiration. © 2015 Wiley Periodicals, Inc. Develop Neurobiol 76: 721–729, 201

Especies de Lepanthes (Orchidaceae) de Colombia

Las orquídeas son una de las familias de plantas más ricas en especies en el mundo y Colombia posee una gran proporción de esta diversidad, con 4000 especies estimadas en 205 géneros, siendo la subtribu Pleurothallidinae una de las más diversas en la familia, incluyendo un 15-20% de las especies de orquÌdeas (Luer 1986). Las Pleurothallidinae son un grupo de orquÌdeas neotropicales, con cerca de 4000 especies distribuidas en 29 géneros (Luer 1986), en las que se incluye el género Lepanthes. Este es el tercer género más diverso de la subtribu, después de Stelis y Pleurothallis, y está comprendido por ca. 800 especies distribuidas desde México hasta Bolivia incluyendo las Antillas (Luer 1996a). Los dos paÌses con m·s especies de Lepanthes son: Colombia con 270 (Listado TaxonÛmico) y Ecuador con 332 (Luer 2002); otros paÌses con buena diversidad son México con 60 (Salazar &amp; Soto 1996) y Costa Rica con 95 (Pupulin 2002); en Puerto Rico se encuentran nueve (Ackerman 1995). Muchas especies de Lepanthes poseen una distribución limitada y presentan un alto grado de endemismo y algunas otras están ampliamente distribuidas. La mayoría de las especies de Lepanthes habitan los bosques nublados, donde las temperaturas son bajas y la humedad es alta

Ultra-broadband 2D electronic spectroscopy of carotenoid-bacteriochlorophyll interactions in the LH1 complex of a purple bacterium

International audienc