Model Test about Reflection Coefficient for Perforated Wall Caisson according to Perforated Wall Shapes: Single Chamber Open Slit Caisson

In this study, the hydraulic model tests for the single chamber perforated wall caisson were performed to investigate the reflection coefficients according to the slit shapes. The perforated wall with vertical and horizontal slits was applied to the tests. The random waves were used for the test by using Bretschneider-Mitsuyasu frequency spectrum. The similar reflection coefficients were measured in the vertical and horizontal slit caisson within a similar perforation ratio and area. The reflection coefficient according to relative slit length(S/Hs) was analyzed and the minimum reflection coefficients were measured in relatively small S/Hs (=2.7). The results from horizontal slits showed similar trends with those from the vertical slit perforated wall.

Adsorption Hysteresis in Open Slit-like Micropores

Adsorption hysteresis in the low-pressure range is only rarely described in the literature. To optimise, for example, heat storage technologies, a deeper understanding of the low-pressure hysteresis (LPH) process is necessary. Here, two thermodynamically based approaches are further developed for analysing the LPH within the framework of thermodynamically irreversible processes and fractal geometry. With both methods developed, it is possible to obtain the description of the adsorption and desorption branches with high accuracy. Within the framework of the two thermodynamic models of the hysteresis loop, generalised equations are obtained with the control parameter in the form of the degree of irreversibility. This is done by taking the adsorption of water on alumina as an example. It is shown that the fractal dimension of the adsorption process is larger than the fractal dimension of the desorption branch, meaning that the phase state of the adsorbate is more symmetric during the adsorption step than in the desorption process.

Schizencephaly with Agenesis of the Corpus Callosum in the Neonatal Period: A Case Report

Schizencephaly is a rare abnormality in supratentorial brain development, the etiopathogenesis of which is not yet clear. This disorder consists of the presence of a slit bordered with gray poly-microgyric substance, which extends from the subarachnoid space to the ventricles: the ventricle and the cortex communicate with each other. Here we report an infant with this condition; its clinical, radiological and prognostic aspects. This infant had unilateral open slit schizencephaly with agenesis of the corpus callosum.

The Methanol Adsorption in Microporous Alumina Agglomerates

We have studied theoretical and experimental methods of methanol adsorption in micropores of aluminum oxide agglomerates obtained by gas-dispersion synthesis. It is shown that the necessity to use strict equations based on the theory of volume filling of micropores, which implies a physical and formal analogy between the volume filling of micropores and capillary condensation, for qualitative and quantitative description of adsorption equilibrium in open slit-like micropores. The applicability of the proposed equations for the description of adsorption equilibrium in such systems is demonstrated on the example of experimental methanol adsorption/desorption isotherm on the aluminum oxide, which possesses a microporous structure.

Anatoma rolani n. sp. and new records of rare Caribbean Anatoma species (Gastropoda: Vetigastropoda: Anatomidae)

Anatomidae McLean, 1989, is a family of small (1–11 mm), slit-bearing Vetigastropoda (see Geiger et al. 2008) occurring from the shallow subtidal to the abyss in all the world’s oceans. They are distinguished from Scissurellidae by the peripheral location of the slit. Three genera have been described: Anatoma Woodward, 1859, Thieleella Bandel, 1998, and Sasakiconcha Geiger, 2006c. The former two have an open slit and are recognized based on protoconch sculpture (Anatoma: flocculent or smooth; Thieleella: reticulate). The monotypic Sasakiconcha has a closed slit forming a foramen.

XV. On the photographic spectrum of comet (Wells) 1,1882

On the evening of Wednesday, May 31, I obtained a photograph of the spectrum of this comet with an exposure of one hour and a quarter. A spectrum of a Ursæ Majoris was taken through the other half of the slit, on the plate, for comparison. The photograph shows a strong continuous spectrum extending from about F to a little beyond H. In this continuous spectrum I am not able to distinguish the Fraunhofer lines. In this comet therefore, at this time, the original light giving a continuous spectrum must have been much stronger relatively to the sunlight reflected than was the case in the comet of last year. It should be stated that the greater faintness of the present comet made it necessary to use a more open slit, which would cause the Fraunhofer lines to be less distinct; but the lines G, H, and K are to be clearly seen in the star’s spectrum taken under the same conditions.