Spatial localization of relaxation dispersion by field-cycling with one-dimensional projection

Peer reviewe

Mass customization of teaching and learning in organizations

In search of methods that improve the efficiency of teaching and training in organizations, several authors point out that mass customization (MC) is a principle that covers individual needs of knowledge and skills and, at the same time, limits the development costs of customized training to those of mass training. MC is proven and established in the economic sector, and shows high potential for continuing education, too. The paper explores this potential and proposes a multidisciplinary, pragmatic approach to teaching and training in organizations. The first section of the paper formulates four design principles of MC deduced from an examination of economics literature. The second section presents amit™, a frame for mass customized training, designed according to the principles presented in the first section. The evaluation results encourage the further development and use of mass customized training in continuing education, and offer suggestions for future research

Imaging and etching: soft x-ray microscopy on whole wet cells

We have produced images of whole wet tissue culture cells with the Stony Brook/BNL scanning transmission x-ray microscope (STXM). For fixed cells we have taken images at theoretical resolutions of ~50-75 nm, and in practice have measured FWHM of features down to near 100 nm, without any exotic image processing. For un-fixed (i.e., initially live) cells we have imaged with 100 nm pixels and measured features down to 250 nm. In order to do this we have developed, tested, and used a wet cell for maintaining fixed or live cells on the STXM stage during imaging. Our design of the wet cell and the culture substrates that go with it make the STXM compatible with almost all standard systems for surface adherent tissue culture. We show some new images of whole wet fixed and unfixed cells, with visible sub-micron features. We also report data that helps to characterize the tissue damage due to x-ray absorption during STXM imaging

First-Summer Survival of Largemouth Bass Cohorts: Is Early Spawning Really Best?

Previous work has demonstrated that survival of largemouth bass Micropterus salmoides through the first year of life can be size dependent, favoring larger individuals. Because size, diet biomass, lipid accumulation, and ultimately overwinter survival of juveniles are typically positively related to age, early spawning is clearly advantageous. However, a true understanding of which largemouth bass cohorts contribute to the new year-class remains somewhat unclear because these conclusions have largely been based upon fish collected during summer rather than fish collected during spring. Conceivably, even earlier hatched cohorts of largemouth bass could have existed in many of these studies, and these fish may simply not have survived to the summer collection period. In order to assess this possibility, we quantified first-summer survival of largemouth bass cohorts collected during 1992 and 1993 in Auburn, Alabama, ponds (which were 2–5 ha each). Our results indicate that it is early-hatched cohorts that likely contribute to the new year-class. Although we found that early-hatched cohorts were lost between May and July, these losses were not attributable to age-dependent mortality; instead, sampling biases associated with avoidance of seines by older, larger young-of-year largemouth bass appear to have driven these shifts. In addition, because we found that size-dependent cannibalism during summer acted to remove smaller, later-hatched largemouth bass, early hatching may enhance survival during larval and early juvenile stages in southern systems (and not just during the winter period). Given this information, fishery managers may potentially be able to implement harvest regulations that are designed to protect large, early-spawning adults, thereby increasing the probability of producing a strong year-class by enhancing first-summer growth and, ultimately, recruitment to adult stages.This research was supported in part by National Science Foundation grants DEB-9108986 and DEB-9410323 and Federal Aid in Sport Fish Restoration project F40-R (administered by the Alabama Game and Fish Division to D. R. DeVries)

Potensi Krim Ekstrak Daun Johar (Cassia Siame) Menghambat Pertumbuhan Candida Albicans

Penelitian ini bertujuan untuk mengetahui potensi krim ekstrak daun johar untuk menghambat pertumbuhan Candida albicans. Penelitian ini merupakan penelitian ekperimental. Daun johar (Cassia siamea Lamk.) diekstraksi dengan metode maserasi mengunakan pelarut etanol 96% kemudian diformulasi dalam bentuk sediaan krim dengan konsentrasi ekstrak 5%b/b dan 10%b/b. Sediaan krim tersebut kemudian diuji kemampuan daya hambatnya terhadap pertumbuhan Candida albicans dengan metode sumuran. Hasil penelitian menunjukkan krim ekstrak daun johar (Cassia siamea Lamk.) konsentrasi 10%b/b memiliki diameter zona hambat terhadap pertumbuhan Candida albicans sebesar 22,5 mm. Daya hambat dari krim ekstrak daun johar konsentrasi 10%b/b termasuk kategori sangat kuat

Green function Retrieval and Time-reversal in a Disordered World

We apply the theory of multiple wave scattering to two contemporary, related topics: imaging with diffuse correlations and stability of time-reversal of diffuse waves, using equipartition, coherent backscattering and frequency speckles as fundamental concepts.Comment: 1 figur