Calibration of CFD Numerical Model for the Analysis of a Combined Caisson

The purpose of this work is the calibration of a numerical model for simulating the interaction of waves with a composite caisson having an internal rubble mound to dissipate incident sea wave energy. In particular, the analysis focused on the reflection coefficient and the pressure distribution at the caisson vertical walls. The numerical model is based on the Volume-Average Reynolds-Averaged Navier–Stokes (VARANS) equations. Through three closure terms (linear, nonlinear, and transition), such equations take into account some phenomena that cannot be dealt when the volume-average method is used (i.e., frictional forces, pressure force, and added mass). To reproduce properly the real phenomena, a calibration process of such terms is necessary. The reference data used in the calibration process were obtained from an experimental campaign carried out at the Hydraulics Laboratory of the University of Messina. The calibration process allowed the proper prediction of certain phenomena to be expressed as a function of different closing terms. In particular, it was estimated that the reflection coefficient and the wave loading at the frontal wall are better reproduced when all three terms are considered, while the force at the rear wall is better simulated when the effects of such terms are neglected.

Pandanipora fragilis—a new deep-water cyclostome bryozoan from the subequatorial Mid-Atlantic Ridge, Atlantic Ocean, and a review of Pandanipora worldwide

A new cyclostome bryozoan, Pandanipora fragilis n. sp., is described from 3453 m depth on the subequatorial Mid-Atlantic Ridge. It differs from the type species, P. helix Grischenko, Gordon & Melnik, 2018, by a combination of colonial and zooidal characters. These include regular branching of a uniserial stem along the entire colony length; a straight or just slightly elevated and gently curved distal autozooidal peristomial component, forming a sharp angle with the frontal wall of the next zooid; the pattern of zooidal budding, achieved via development of a partition from the floor of the parent zooid in its distal quarter to third, leaving the proximal portion of daughter zooids not overlapping, so that preceding and subsequent zooids are not appressed along their proximal segments; props are uniformly straight and filiform, with their diameter much smaller than in P. helix; the exceptionally rare presence of slit-like pseudopores, restricted to props; and wedge-shaped crystallites on the internal surface of developing zooids, with irregular, ragged edges. The discovery of P. fragilis suggests that Pandanipora is most likely a relict element of a more-widespread ancient distribution that existed in tropical and boreal zones of both the Atlantic and Pacific Oceans prior to formation of the Isthmus of Panama in the Pliocene.

Ultrastructure of the prosomal gland complex in unfed larvae of the fresh-water mite Limnesia maculata (Müller, 1776) (Acariformes, Limnesiidae)

The salivary and coxal glands in unfed larvae of the fresh-water mite Limnesia maculata (Müller, 1776) (Acariformes, Limnesiidae) were studied using light and electron microscopy. Three pairs of the salivary and one pair of the coxal glands constitute the prosomal gland complex. The salivary glands pertain to simple alveolar glands consisting of the single acinus with prismatic cells arranged around the intra-alveolar lumen. Owing to their spatial distribution, the salivary glands may be termed as medial, ventral and lateral. While the ventral and lateral glands are arranged symmetrically, the medial glands are disposed one after another at the frontal wall of the synganglion (brain). The medial and the ventral glands possess mostly electron-dense secretory granules supposedly of protein nature. The lateral glands show variable organization mainly having electron-lucent vacuoles. No well pronounced rough endoplasmic reticulum and Golgi bodies were discernible in the salivary glands. The coxal glands are well developed and composed of (i) the main portion (the so-called labyrinth) including at least two tightly opposed loops and extending backward along the brain, and (ii) the very short anterior portion/end piece transforming anteriorly into the terminal sac/bladder. The cells of the main portion are provided with apical microvilli, whereas the basal infolding/basal labyrinth is lacking. The cells of the anterior portion do not show the apical microvilli and the basal infoldings. The terminal sac is lined by a cuticle and has an ectodermal origin. The ducts of the salivary glands come together at the dorsal aspect of the bladder, to which they open forming the common podocephalic duct anteriorly. The latter opens on each side into the subcheliceral space. The well-developed podocephalic system suggests its active role in the living processes such as feeding and ion-water balance.

Experimental and Numerical Investigation the Effect of Grooves Impeller on Rotating Stall of High Speed Blower

Experimental and numerical investigation to study the influence of add (one groove and two grooves) to the unshroud impeller onto the rotating stall as well fluctuations of pressure at a high speed blower of centrifugal. Experimental test rig which includes blower of centrifugal, transducer of pressure as well measurement instrumentations are constructed and designed for this study. A data acquisition system (hardware) as well its (software) have been developed into transferring the signal than transducer of pressure to the computer. The experimental work has been implemented through measuring the variation of static pressure as well fluctuation of pressure for two cases of the impeller (with one groove and with two grooves). Static pressure has been taken in different points arranged onto the frontal-wall of a volute casing along one track for two cases of the impeller. This track is angular track about the impeller. The results of experimental show that the fluctuations of pressure for different mass flow rates are nature of non-periodical and the mass flow rates decrease with the fluctuations of pressure increase. Also, the results indicate that the impeller with two grooves show high mass flow rates comparison with the impeller with one groove. Simulation of numerical has been implemented onto blower of centrifugal to analysis both field of flow as well fluctuations of pressure through using ANSYS (FLUENT 15). The simulation of numerical has been carried out through solve the continuity as well momentum equations with the moving reference framework technicality inside a blower. The numerical simulation results show good agreement with the results of experimental.

Living and fossil Steginoporellidae (Bryozoa: Cheilostomata) from New Zealand

The cheilostome bryozoan family Steginoporellidae in New Zealand comprises seven living species of Steginoporella. Three of these are new to science—Steginoporella discors n. sp., Steginoporella lineata n. sp. and Steginoporella modesta n. sp.—and one (Steginoporella magnifica) additionally occurs as a Plio-Pleistocene fossil. A new Early Pleistocene fossil species, Steginoporella tiara n. sp., is also recognised. The living species exhibit the full range of colonial morphologies known for the genus, and two of the new deep-shelf taxa described herein have the smallest known colonies, both linear, not exceeding 5 mm in width and 22 mm in length. One species has a recorded depth range down to 615 m, apparently the deepest known for the genus. Zooidal proportions vary, with a length:width ratio in the seven living species ranging from 1.31 to 1.81, exceeded only by that in the new fossil taxon, which has very elongate zooids. Notwithstanding the conspicuous differences in colonial and zooidal morphology, four of the living species appear to be closely related, sharing distinctive reticulation of opercular sclerites, a similar morphology of the median process and no B-zooid morphs. Only one New Zealand taxon has B-zooids. Biogeographically, all the species except S. magnifica (also known from Tonga) are nominally endemic, but it is possible that some of the deeper-water taxa may eventually be found outside the boundary of the New Zealand Exclusive Economic Zone. The operculum in Steginoporella species is initially a single thin layer continuous with the membranous frontal wall, becoming two-layered when fully functioning in feeding zooids and mandibulate B-zooids.

Results of study on changes in the body of livestock castrated by unopened method

"Tartu-SHAB" emasculator for unopened castration of male calf, lamb and kids is used to break ductus deferens and blood vessels and damage cremaster muscle after detecting outside the spermatic cord via palpation of scrotal neck skin. Movement of castrated animal becomes slower, hind legs are slightly spread, animal steps on frontal wall of its hind leg hooves and lifts one of hind legs in turn, and superficial, small, painful, differently sized, and warmer swelling appears. Cremaster fascia of testicle tissue castrated animals (at day 30) divides testicle parenchyma into lobules and there are epithelial cells producing spermatozoa at various stages of development in the wall of seminiferous tubules, Sertoli cells and Leydig cells in reticular and soft connective tissues between seminiferous tubules. But at day 60, thickened outer layer of testicle, larger gaps between tubules, structural change of primary and secondary spermatozoa, ceased cellular division cellular division and absence of Leydig cells reveal the process of atrophy. DOI: http://dx.doi.org/10.5564/mjas.v11i2.215 Mongolian Journal of Agricultural Sciences Vol.11(2) 2013 pp.43-48

New and little known species of Celleporina Gray, 1848 (Bryozoa, Cheilostomata) from the Atlantic–Mediterranean region

Celleporina parvula, a species present in shallow waters along the NW African coast, is re-described from its original material. Celleporina fragilis, only known from the Canaries, and Celleporina derungsi, from south Portugal, are newly reported from the Gorringe Bank and NW Iberian Peninsula respectively. Two new species are described: Celleporina algarvensis n. sp., from south Portugal, and Celleporina mediterranea n. sp., from NW Mediterranean. The structure of the ooecium and its tabula, and the structure of the frontal wall in the genus Celleporina are discussed in the light of new observations.

A Diagnosis of Maxillary Sinus Fracture with Cone-Beam CT: Case Report and Literature Review

The purpose of this article is to present the case of maxillofacial trauma patient with maxillary sinus fracture diagnosed with cone-beam computed tomography (CBCT) and to explore the applications of this technique in evaluating the maxillofacial region. A 23-year-old male patient attempted to our clinic who had an injury at midface with complaints of swelling, numbness. The patient was examined before in emergency center but any diagnosis was made about the maxillofacial trauma. The patient re-examined clinically and radiographically. A fracture on the frontal wall of maxillary sinus is determined with the aid of CBCT. The patient consulted with the department of maxillofacial surgery and it is decided that any surgical treatment was not necessary. The emerging technique CBCT would not be the primary choice of imaging maxillofacial trauma. Nevertheless, when advantages considered this imaging procedure could be the modality of choice according to the case.