Now showing items 1-20 of 1582

    • Circular Polarization Vision in a Stomatopod Crustacean 

      Chiou, Tsyr-Huei; Kleinlogel, Sonja; Cronin, Tom; Caldwell, Roy; Loeffler, Birte; Siddiqi, Afsheen; Goldizen, Alan; Marshall, Justin (Elsevier B.V, 2008-03-25)
      We describe the addition of a fourth visual modality in the animal kingdom, the perception of circular polarized light. Animals are sensitive to various characteristics of light, such as intensity, color, and linear ...
    • Transmission of linearly polarized light in seawater: implications for polarization signaling 

      Shashar, Nadav; Sabbah, Shai; Cronin, Thomas W. (The Company of Biologists Ltd, 2004-07-12)
      Partially linearly polarized light is abundant in the oceans. The natural light field is partially polarized throughout the photic range, and some objects and animals produce a polarization pattern of their own. Many ...
    • Spectral sensitivity of four species of fiddler crabs (Uca pugnax, Uca pugilator, Uca vomeris and Uca tangeri) measured by in situ microspectrophotometry 

      Jordão, Joana M.; Cronin, Thomas W.; Oliveira, Rui F. (The Company of Biologists Ltd, 2007-01-17)
      Fiddler crabs have compound eyes that are structurally fairly well understood. However, there has been much debate regarding their spectral sensitivity and capacity to enable colour discrimination. We examined the ...
    • Spectral and spatial properties of polarized light reflections from the arms of squid (Loligo pealeii) and cuttlefish (Sepia officinalis L.) 

      Chiou, Tsyr-Huei; Mäthger, Lydia M.; Hanlon, Roger T.; Cronin, Thomas W. (The Company of Biologists Ltd, 2007-07-16)
      On every arm of cuttlefish and squid there is a stripe of high-reflectance iridophores that reflects highly polarized light. Since cephalopods possess polarization vision, it has been hypothesized that these polarized ...
    • Polarization signals in mantis shrimps 

      Cronin, Thomas W.; Chiou, Tsyr-Huei; Caldwell, Roy L.; Roberts, Nicholas; Marshall, Justin (SPIE, 2009-08-11)
      While color signals are well known as a form of animal communication, a number of animals communicate using signals based on patterns of polarized light reflected from specialized body parts or structures. Mantis shrimps, ...
    • Light habitats and the role of polarized iridescence in the sensory ecology of neotropical nymphalid butterflies (Lepidoptera: Nymphalidae) 

      Douglas, Jonathan M.; Cronin, Thomas W.; Chiou, Tsyr-Huei; Dominy, Nathaniel J. (The Company of Biologists Ltd, 2007-02-12)
      The exploitation of polarized light may increase perceived visual contrast independent of spectrum and intensity and thus have adaptive value in forest habitats, where illumination varies greatly in brightness and spectral ...
    • Learning in Stomatopod Crustaceans 

      Cronin, Thomas W.; Caldwell, Roy L.; Marshall, Justin (International Society for Comparative Psychology, 2006-12-31)
      The stomatopod crustaceans, or mantis shrimps, are marine predators that stalk or ambush prey and that have complex intraspecific communication behavior. Their active lifestyles, means of predation, and intricate displays ...
    • Interspecific and intraspecific views of color signals in the strawberry poison frog Dendrobates pumilio 

      Siddiqi, Afsheen; Cronin, Thomas W.; Loew, Ellis R.; Vorobyev, Misha; Summers, Kyle (The Company of Biologists Ltd, 2004-04-21)
      Poison frogs in the anuran family Dendrobatidae use bright colors on their bodies to advertise toxicity. The species Dendrobates pumilio Schmidt 1858, the strawberry poison frog, shows extreme polymorphism in color and ...
    • Adaptive signaling behavior in stomatopods under varying light conditions 

      Cheroske, Alexander G.; Cronin, Thomas W.; Durham, Mary F.; Caldwell, Roy L. (Taylor and Francis Online, 2009-09-07)
      Stomatopod crustaceans (mantis shrimp) are aggressive benthic marine predators with extraordinary color vision. When communicating with conspecifics, many stomatopods display conspicuously colored body areas, often in ...
    • Polarization patterns of the twilight sky 

      Cronin, Thomas W.; Warrant, Eric J.; Greiner, Birgit (SPIE, 2005-08-18)
      Although natural light sources produce depolarized light, patterns of partially linearly polarized light appear in the sky due to scattering from air molecules, dust, and aerosols. Many animals, including bees and ants, ...
    • Fine structure and optical properties of biological polarizers in crustaceans and cephalopods 

      Chiou, Tsyr-Huei; Caldwell, Roy L.; Hanlon, Roger T.; Cronin, Thomas W. (SPIE, 2008-03-24)
      The lighting of the underwater environment is constantly changing due to attenuation by water, scattering by suspended particles, as well as the refraction and reflection caused by the surface waves. These factors pose a ...
    • Biological properties of coral GFP-type proteins provide clues for engineering novel optical probes and biosensors 

      Salih, Anya; Larkum, Anthony W.; Cronin, Thomas W.; Wiedenmann, Joerg; Szymczak, Ron; Cox, Guy C. (SPIE, 2004-06-14)
      In recent years, a variety of Green Fluorescent Protein (GFP)-like pigments have been discovered from corals and other marine organisms. They are widely used to expand the range of available GFP-type proteins in imaging ...
    • Biological polarized light reflectors in stomatopod crustaceans 

      Chiou, Tsyr-Huei; Cronin, Thomas W.; Caldwell, Roy L.; Marshall, Justin (SPIE, 2005-09-10)
      Body parts that can reflect highly polarized light have been found in several species of stomatopod crustaceans (mantis shrimps). These polarized light reflectors can be grossly divided into two major types. The first ...
    • Effect of Birth Preparedness on Institutional Delivery in Semiurban Ethiopia: A Cross-Sectional Study 

      Rosado, Carina; Callaghan-Koru, Jennifer A.; Estifanos, Abiy Seifu; Sheferaw, Ephrem; Shay, Thewodros; Graft-Johnson, Joseph de; Rawlins, Barbara; Gibson, Hannah; Baqui, Abdullah H.; Nonyane, Bareng Aletta Sanny (Ubiquity Press, 2019-03-21)
      Background: Ethiopia has one of the lowest rates of facility delivery and is promoting birth preparedness among pregnant women through its community health services to increase the rate of institutional delivery and reduce ...
    • Neural network cloud retrievals from POLDER 

      Noia, Antonio Di; Hasekamp, Otto P.; Diedenhoven, Bastiaan van; Zhang, Zhibo (Copernicus Publications on behalf of the European Geosciences Union, 2019-03-18)
      This paper describes a neural network algorithm for the estimation of liquid water cloud optical properties from the Polarization and Directionality of Earth’s Reflectances-3 (POLDER-3) instrument aboard the Polarization ...
    • Plasmon-exciton coupling 

      Pelton, Matthew; Sheldon, Matthew; Khurgin, Jacob (De Gruyter, 2019-03-15)
    • Solution Uniqueness of Convex Piecewise Affine Functions Based Optimization with Applications to Constrained ℓ 1 Minimization 

      Mousavi, Seyedahmad; Shen, Jinglai (2017-11-16)
      In this paper, we study the solution uniqueness of an individual feasible vector of a class of convex optimization problems involving convex piecewise affine functions and subject to general polyhedral constraints. This ...
    • Exact Support and Vector Recovery of Constrained Sparse Vectors via Constrained Matching Pursuit 

      Shen, Jinglai; Mousavi, Seyedahmad (2019-03-18)
      Matching pursuit, especially its orthogonal version and other variations, is a greedy algorithm widely used in signal processing, compressed sensing, and sparse modeling and approximation. Inspired by constrained sparse ...
    • Effect of sulfide on growth of marine bacteria 

      Mirzoyan, Natella; Schreier, Harold J. (Springer Nature Switzerland AG., 2014-03-09)
      Severe hypoxia leads to excess production of hydrogen sulfide in marine environments. In this study, we examined the effect of sulfide on growth of four facultative anaerobic marine bacteria in minimal media under anaerobic ...
    • The ILRS: approaching 20 years and planning for the future 

      Pearlman, Michael R.; Noll, Carey E.; Pavlis, Erricos C.; Lemoine, Frank G.; Combrink, Ludwig; Degnan, John J.; Kirchner, Georg; Schreiber, Ulrich (Springer Nature Switzerland AG., 2019-03-19)
      The International Laser Ranging Service (ILRS) was established by the International Association of Geodesy (IAG) in 1998 to support programs in geodesy, geophysics, fundamental constants and lunar research, and to provide ...