Features of design and calculation of sliding gates of industrial buildings and structures

The article discusses the design features of sliding gates, reviewed patents from 1983 to the present, analyzed the recommendation methods for calculating cantilever sliding gates. It is established that the designs of sliding gates for long-term trouble-free operation must meet the requirements for the first and second group of limiting conditions for gates as a building structure, specific requirements for the operation of structures (reduced deflections, roll and bends), the minimum weight of the movable part of the gate for the use of an opening mechanism of lower power.

New Method for the Estimation and Validation of Fostemsavir and Ganciclovir by using RP-HPLC

We have evolved a completely unique, reliable HPLC technique for simultaneous quantification of Fostemsavir and Ganciclovir. The chromatographic detachment was attained on an X-Bridge phenyl column (150x4.6mm, 3.5 µ) using isocratic elution with a buffer containing 0.1% OPA and acetonitrile proportion of 50:50 as movable part with a stream of 1 mL/min at room temperature. The maximum absorbance of the drugs was observed at 236 nm. Dissolve 1mL of orthophosphoric acid in 1 lt of HPLC marked water and sieved by using 0.45 µ filter paper, this solution was used as a buffer. 10 min run time was used to separate Fostemsavir and Ganciclovir. Analysis was achieved within 15 min over honest linearity within the concentration range from 6-90 µg/mL of Fostemsavir and 2.5-37.5 µg/mL of Ganciclovir. To check the system suitability parameters, the normal solution was injected six times, from the outcomes, it was concluded that all the outcomes were well under the acceptable range. Precision and recovery study results were well under a suitable range. From this technique, an assay of Fostemsavir and Ganciclovir was performed and the results were well under the acceptable range. Degradation studies were carried out on Fostemsavir and Ganciclovir, with a purity threshold greater than the purity angle in all conditions and within the acceptable range. The above-mentioned technique was validated according to ICH guidelines.

Method of remote control of the position of the movable part of the elastic connecting unit

A method for remote control of the position in space of the movable part of the elastic connecting unit is proposed. The control is carried out by continuous measurement of six lengths between the tops of two triangles, rigidly connected, respectively, with the fixed and the movable parts of the connecting unit. For measuring the lengths, it is proposed to use Вт 718 cable sensors. Keywords: elastic connecting joint, remote control of coordinates, displacement vector, rotation vector. [email protected]

Morphometric Relationships in the Blue Swimming Crabs, (Portunus pelagicus) (Linnaeus, 1758) from the Palk Bay, Sri Lanka

The blue swimming crab (Portunus pelagicus) has become the focus of an important export-oriented fishery in Sri Lanka for a decade. The Palk Bay in the Northern coastal waters of Sri Lanka is one of the best-known fishing grounds for blue swimming crabs in Sri Lanka. This study was undertaken with the aim of establishing some morphometric relationships for P. pelagicus in the Palk Bay. Biological sampling was conducted for five consecutive days per month from November 2014 - October 2015 in the Northern landing sites in the Jaffna District where the catch of Palk Bay blue swimming crab fishery was landed. P. pelagicus specimens were also randomly collected for laboratory analysis. The morphometric measurements of the specimens for the following parameters were undertaken: CW - carapace width with the spine, CWW - carapace width without spine, MW – mouth width, TL - total length, LCPL - left chelar propodus length, LMOV - left movable part Length, RMOV - right movable part length, LCPH - left chelar propodus height, RCPH - right chelar propodus height, ABW - abdominal width, ABL - abdominal length and BW - body weight. The least squared method was used to obtain the Length-Length (L-L) and Length-Weight (L-W) relationships. Of the 65 L-L relationships obtained for P. pelagicus from the study, 34 relationships were correlated (r2>0.5). The estimated relationships between BW and CW for males and females were BW=0.0001 CW 3.01 (r2 =0.84) and BW= 0.0001 CW 2.90 (r2 =0.86), respectively. Positive allometric growth was observed for male P. pelagicus, whereas a negative allometric growth was observed for female P. pelagicus. Most of the morphometric relationships of P. pelagicus obtained in this study were not isometric.

An experience of elaboration and implementation of systems of slag-forming mixtures mechanized feeding into CCM moulds

Effective application of slag-forming mixtures (SFM), being fed into continuous castingg machine (CCM) moulds, depends on their even distribution on the melt surface. Manual feeding of the SFM which is widely usedd does not provide this condition, resulting in the necessity to actualize the work to elaborate systems of SFM mechanized feedingg into moulds of various types CCM. A concept of the designing of a system of SFM feeding into CCM moulds presented with the ratte strictly correspondent to the casting speed and providing formation of an even layer of fine material of given thickness on the whoole surface of liquid steel. The proposed methods of designing of the SFM mechanized feeding systems based on three-dimensional computer simulation with the subsequent verification of the correctness of the adopted technical solutions on field samples. Informattion is presented on the design features of the adjusted facilities intended for continuous supply of finely granulated and powder mixtuures on metal mirror in moulds at the production of high-quality billets, blooms and slabs. Variants of mechanical and pneumo-mechaanical SFM supply elaborated. At the mechanical supply the fine material from the feeding hopper is moved at a adjusted distance bby a rigid horizontally located screw. At the pneumo-mechanical supply the metered doze of the granular mixture is delivered by a sshort vertical screw, the lower part of which is located in the mixing chamber attached from below to the hopper and equipped with ann ejector serving for pneumatic supply of the SFM in a stream of transporting gas. It was proposed to use flexible spiral screws in the ffuture facilities of mechanical SFM feeding. It will enable to eliminate the restrictions stipulated by the lack of free surface for locatiion of the facility in the working zone of the tundish, as well as to decrease significantly the mass of its movable part and to decreaase the necessary power of the carriage moving mechanism driver. The novelty of the proposed technical solutions is protected by thhree patents. The reduction of 10–15% in the consumption of slag-forming mixtures during the transition from manual to mechanizeed feeding confirmed. The resulting economic effect from the implementation of technical development enables to recoup the costs inncurred within 8–10 months.

Developing a Movable Part for a Test Bench Featuring a Linear Motor and Magnetic Suspensionfor Simulating Inertial Loads on an Object

We selected the main parameters for a new layout of a centrifugal installation featuring a linear motor and magnetic suspension. Since existing test benches for simulating linear accelerations have a range of disadvantages, we propose to consider an alternative to the classical layout, in particular, to reject the rotary link and replace it by a ring-like path structure with a linear motor, along which a trolley carrying the object under investigation will move on a magnetic suspension. We analysed various spatial stabilisation systems for the trolley moving at high velocities. We defined the key initial data, taking into account descent into planetary atmospheres, design specifics of products subjected to G-forces and existing centrifugal installations. We computed the parameters of a magnetic suspension based on high-temperature superconducting yttrium ceramics and electrical engineering parameters of the linear motor, and carried out strength calculations for the movable part of the test bench using the Femap with NX Nastran software package, accounting for the operational loads intended. The paper presents an option for implementing a new structural layout of an experimental installation that ensures linear acceleration testing in various operation modes

Robotic Arm for the Easy Mobility of Amputees using EMG Signals

A robotic arm is a Programmable mechanical arm to replicate the functions of human arm. They are widely used in industries. Human robot-controlled interfaces mainly focus on providing rehabilitation to amputees in order to overcome their impairment or disability leading them to live a normal life. The major objective of this paper is to develop a movable robotic arm controlled by EMG signals from the muscles of the upper limb. In this system, we mainly focus on providing a low 2-dimensional input derived from electromyography to move the arm. This work involves creating a prosthesis system that allows signals recorded directly from the human body. The arm is mainly divided into 2 sections, control section and moving section. Movable part contains the servo motor which is connected to the Arduino Nano board, and it helps in developing a motion in accordance with the EMG signals acquired from the body. Control part is the part which is controlled by the operation in accordance with the movement of the amputee mainly the initiation of the movement with respect to the threshold fixed in the coding. The major theme of the project is to provide an affordable and easily operable device that helps even the poor sections of the amputated society to lead a happier and normal life by mimicking the functionaries of the human arm in terms of both the physical, structural as well as functional aspects

EXPERIMENTAL STAND AND METHODOLOGY FOR THE ROLLER’S WORKING BODY RESEARCH

Introduction. The paper researches the sphere of paving with a roller. The authors describe the current situation in the asphalt concrete’s application as a road surface. Moreover, the authors conduct the excursion into the history of material. The paper presents the preconditions that justify the need for creating recommendations, schemes and methods for experimental study of the working body and material under laboratory conditions of various kinds. The aim of the study is to create the stand concept and methods for experimental research of the roller’s working body in the laboratory.Materials and methods. The paper described a laboratory stand for experiments in the sphere of roller’s working equipment. The authors demonstrated the construction made of a base, a stiffener box, guides and a movable part with a frame and equipment, suspended above the compacted material’s container.Results. As a result, the authors presented the detailed methodology for conducting experiments and recommendations for its transformation in the considered sphere. The paper showed all the necessary data for the design, construction of the test bench and experiments with the roller’s working equipment. Discussion and conclusions. Researchers, especially beginners, receive an additional tool for study of dependencies and phenomena that occur during compaction of material by the roller. Therefore, the authors develops the scheme for the research of the roller’s working body in small area conditions and in extensive laboratories.