Revised Morphological Characteristics of Species of Two Ostracod Genera Loxoconcha Sars, 1866 (Loxoconchidae) and Xestoleberis Sars, 1866 (Xestoleberididae)

Total 23 species of the genus Loxoconcha and 21 species of the genus Xestoleberis were presented in this study. A scanning electron microscope for observing muscle scars of the carapaces, and a stereoscopic microscope for dissecting, observing and sketching the appendages were used. The results show that most species of the genus Loxoconcha consist of four adductor scars to arrange in a curved sub-vertical row and concave anteriorly, except L. pulchra carrying five, in which the top one is divided into two. The frontal scars with C-shape, opening anteriorly are presented in most of Loxoconcha species, however, the frontal scar with bean-shape or oval-shape is discovered in five species of L. japonica group. Most of L. kosugii bear the frontal scar with C-shape, but the frontal scar with Y-shape is found in several individuals. This phenemenon shows the close phylogeny between the genus Loxoconcha and Palmoconcha. About the genus Xestoleberis, chaetotaxy of setae on all appendages, except setae of exopodite on the maxillula is a typical character of this genus. The published fossil records and the tendencies of change in the number of setae on the maxillula and mandible among three phylogenetic groups suggest that Group A or B is an ancestor of the genus Xestoleberis, and Group C is a derived group.

SOME PECULIARITIES OF THE INSTALLATION, DESIGN AND CALCULATION OF HINGE BOLT CONNECTIONS IN THE FLOWS OF STEEL DOUBLE BEAMS IN THE RECONSTRUCTION OF BUILDINGS

Formulation of the problem. The object of study is steel beams of technological sites and coatings of buildings under static load. Statically indeterminate beams of the 1st class (according to the classification given in DBN B.2.6-198:2014) are considered, for which as a result of the reconstruction of the building provided in the project, increase in intensity of loading increase of bearing capacity of beams is required. The analysis of the existing ways of increase of bearing capacity of beams without strengthening by a method of increase in cross sections, namely, vertical movement of supports of a beam, the device of artificial hinges in beams of a beam is resulted. These methods allow the adjustment of the forces in the beam so that the bending moments in the run and the support section are the same in absolute value, which is less than the maximum bending moment in the beam before the adjustment of the forces. The problem is the design of the bolted hinged connection of the suspension beam with the cantilever beam without dismantling the beam stored for further operation, or without the installation of temporary supports in the joint area. The purpose of the article. Identify and take into account the features of the location, calculation, design and execution of hinged bolted joints in the beams saved for further operation of the beams without their dismantling. Conclusion. The design of the hinged bolted connection of the suspended beam with the cantilever has been developed. The walls of the suspension and cantilever beams are connected so that on one side of the joint the bolts are located in one vertical row, which provides free rotation of the cross sections of the suspension and cantilever beam with sufficient, determined by calculation, the difference between the diameters of holes and bolts. One vertical row of bolts should be placed in the wall of the suspension beam, for the strength of the bolted connection of the pads. An example of construction and calculation of a hinged cantilever beam formed from an integral two-span beam during the reconstruction of the building is given.

Loimia ramzegasp. nov., a new giant species of Terebellidae (Polychaeta) from French waters (Brittany, English Channel)

A new species of Terebellidae,Loimia ramzegasp. nov., has been identified from North Brittany beaches (English Channel). This new species is characterized by its gigantic size (max 650 mm, live), two pairs of lateral lappets on segments 1 and 3; first pair more ventral, second pair more developed and lateral but oblique, with wavy edge. Nine ventral pads from segment 2 (fused on segments 2 and 3), first three pads swollen, next ones subsequently decreasing in size. Three types of notochaetae, asymmetrically bilimbate, symmetrically bilimbate and capillary. Uncini pectinate with 6 teeth (some with 5 teeth) slightly decreasing in size, in one vertical row. Pygidium with about 14 long conical marginal papillae surrounding anus.

SPINNING LED DISPLAYUSING RADIO FREQUENCY

The project consists of Spinning LED display using RF which displays the messages send by the user at the handheld device. if there are no inputs from the user for the system, the message that is programmed in the microcontroller will be displayed continuously. The circuit needs to be mounted on a mechanical structure that rotates at high speed. The display consists of 7 LEDs only in a vertical row. By moving them fast enough, message can be displayed which appears to be generated by a 7*n matrix of LEDs and not a single column of LEDs, where n is the no. of columns of the display matrix. This illusion is based on inertia of human eye or in other terms PERSISTANCE OF VISION. It consists of motor and seven LEDs that are arranged in a vertical line. The motor spins at a constant rate such that the LEDs rotate around a centre pivot point. As the LEDs spin around they light up sequentially such that they will display the message. The motor spinning fast enough that the human eye will perceive all of the display is on at once, and the viewer will be able to read the message completely. If LED formed message will periodically and frequently enough flash, they will appear solid and steady. A microcontroller is used to keep the message and blink the LEDs in an appropriate pattern. It has to be programmed so that it will both keep message and also send the appropriate signals to the LEDs to light them in the correct sequence.

SPINNING LED DISPLAY USING RADIO FREQUENCY

The project consists of Spinning LED display using RF which displays the messages send by the user at the handheld device. if there are no inputs from the user for the system, the message that is programmed in the microcontroller will be displayed continuously. The circuit needs to be mounted on a mechanical structure that rotates at high speed. The display consists of 7 LEDs only in a vertical row. By moving them fast enough, message can be displayed which appears to be generated by a 7*n matrix of LEDs and not a single column of LEDs, where n is the no. of columns of the display matrix. This illusion is based on inertia of human eye or in other terms PERSISTANCE OF VISION. It consists of motor and seven LEDs that are arranged in a vertical line. The motor spins at a constant rate such that the LEDs rotate around a centre pivot point. As the LEDs spin around they light up sequentially such that they will display the message. The motor spinning fast enough that the human eye will perceive all of the display is on at once, and the viewer will be able to read the message completely. If LED formed message will periodically and frequently enough flash, they will appear solid and steady. A microcontroller is used to keep the message and blink the LEDs in an appropriate pattern. It has to be programmed so that it will both keep message and also send the appropriate signals to the LEDs to light them in the correct sequence.

A new species of Liotyphlops (Serpentes: Anomalepididae) from the Atlantic Rain Forest of Northeastern Brazil

A new species of the genus Liotyphlops, known from three localities in the states of Alagoas and Bahia, in the Atlantic Rain Forest of Northeastern Brazil, is described. Liotyphlops trefauti sp. nov. is distinguished from all other species of the genus by the following combination of characters: four scales contacting the posterior edge of prefrontal; one scale contacting the posterior edge of nasal, between the second supralabial and the frontal; five scales in the first vertical row of lateral head scales; 22-22-22 scales around body; 520–543 dorsal scales; 499–532 ventral scales; absence of eye spot; and dorsal and ventral color bright yellowish-brown to reddish-brown.

A new species of Liotyphlops (Serpentes: Anomalepididae) from the Atlantic Rain Forest of Northeastern Brazil

A new species of the genus Liotyphlops, known from three localities in the states of Alagoas and Bahia, in the Atlantic Rain Forest of Northeastern Brazil, is described. Liotyphlops trefauti sp. nov. is distinguished from all other species of the genus by the following combination of characters: four scales contacting the posterior edge of prefrontal; one scale contacting the posterior edge of nasal, between the second supralabial and the frontal; five scales in the first vertical row of lateral head scales; 22-22-22 scales around body; 520–543 dorsal scales; 499–532 ventral scales; absence of eye spot; and dorsal and ventral color bright yellowish-brown to reddish-brown.