Research model robot-hexapod under static and dynamic loads

In the paper the stress-strain state of hexapod robot is considered in order to clarify its dynamical characteristics. Full-size model of hexapod robot is built in the SolidWorks program complex. The state of the robot was analyzed in an extremely dangerous location at static loading. Dynamic analysis was conducted to clarify oscillation of the support unit in the robot’s construction. The results of the survey show that such robot design cannot be used in the environments with the vibrating background below 5 Hz

Разработка Web-портала

Traditionally, a portal denotes a gate, a door, or entrance. In the context of th

Organ–preserving operations for the gun–shot thoraco–abdominal and abdominal woundings with splenic injuries

Objective.To determine the expediency of the spleen–preserving operations performance for its injury due to gun–shot thoraco–abdominal and abdominal woundings. Materials and methods. Of 51wounded persons with the gun–shot penetrating abdominal woundings with splenic injuries 8 (15.7%) were operated on the II level of the medical help delivery, while on the ІІІ level – 43 (84.3%). Of 43 wounded persons, operated on the ІІІ level of the medical help delivery, in 35 (81.4%) splenectomy was performed, while in 8 (18.6%) – the organ–preserving operations. All the splenic injuries have been characterized as a shrapnel woundings. The splenic damage degree was estimated in accordance to Moore, taking into account its structure. In 5 (62.5%) wounded persons the open laparotomy organ–preserving operations were performed, and while using video–laparoscopic system– in 3 (37.5%). Results. Ultrasonographic investigation in accordance to the FAST–protocol was done in all the wounded persons, what have permitted to determine the blood abdominal outpouring volume as well as the splenic injury presence. The affection volume and further tactics were determined using video–laparoscopy. The Stage I splenic affection in accordance to Moore was diagnosed in 4 (50%) wounded persons, the Stage ІІ – in 3 (37.5%), and the Stage ІІІ – in 1 (12.5%). In all the patients, in whom organ–preserving interventions were performed, the surgical help volume consisted of coagulation, using the radiofrequency therapy apparatus MEDTRONICAEX and the hemostatic sponge application with drainage of the left subdiaphragmatic space, using silicone tube. Conclusion. Organ–preserving operations in splenic injury are expedient to be performed on ІІІ level of the medical help delivery, while presence of local conditions, such as the organ injury degrees І and ІІ,determined in accordance to Moore, as well as adequate time and equipment

Reconstruction of sub-threshold events of cosmic-ray radio detectors using an autoencoder

Radio detection of air showers produced by ultra-high energy cosmic rays is a cost-effective technique for the next generation of sparse arrays. The performance of this technique strongly depends on the environmental background, which has different constituents, namely anthropogenic radio frequency interferences, synchrotron galactic radiation and others. These components have recognizable features, which can help for background suppression. A powerful method for handling this is the application of convolution neural networks with a specific architecture called autoencoder. By suppressing unwanted signatures, the autoencoder keeps the signal-like ones. We have successfully developed and trained an autoencoder, which is now applied to the data from Tunka-Rex. We show the procedures of the training and optimization of the network including benchmarks of different architectures. Using the autoencoder, we improved the standard analysis of Tunka-Rex in order to lower the threshold of the detection. This enables the reconstructing of sub-threshold events with energies lower than 0.1 EeV with satisfactory angular and energy resolutions

Research strategies for organizational history:a dialogue between historical theory and organization theory

If history matters for organization theory, then we need greater reflexivity regarding the epistemological problem of representing the past; otherwise, history might be seen as merely a repository of ready-made data. To facilitate this reflexivity, we set out three epistemological dualisms derived from historical theory to explain the relationship between history and organization theory: (1) in the dualism of explanation, historians are preoccupied with narrative construction, whereas organization theorists subordinate narrative to analysis; (2) in the dualism of evidence, historians use verifiable documentary sources, whereas organization theorists prefer constructed data; and (3) in the dualism of temporality, historians construct their own periodization, whereas organization theorists treat time as constant for chronology. These three dualisms underpin our explication of four alternative research strategies for organizational history: corporate history, consisting of a holistic, objectivist narrative of a corporate entity; analytically structured history, narrating theoretically conceptualized structures and events; serial history, using replicable techniques to analyze repeatable facts; and ethnographic history, reading documentary sources "against the grain." Ultimately, we argue that our epistemological dualisms will enable organization theorists to justify their theoretical stance in relation to a range of strategies in organizational history, including narratives constructed from documentary sources found in organizational archives. Copyright of the Academy of Management, all rights reserved

Surgical tactics of treatment of a cryptorchism in the specializes uroandrological center

Cryptorchism is a polyetiological disease that may affect one or two undescended testicles. In the Medical Center of Male Health in Stavropol an algorithm of active detection, treatment and monitoring of patients with cryptorchism has been developed and successfully applied. This leads to the identification of different forms of cryptorchism in the early stages. Using precise surgical techniques allows to avoid complications such as testicular atrophy and disease recurrence. Furthermore, active postoperative surveillance and hormone rehabilitation minimizes the risk of male infertility.</em