Technology adoption review for ageing well: analysis of technical solutions

While several technological solutions are available for older adults to improve their wellbeing and quality of life, little is known about the gaps between the needs, provided solutions, and their adoption from a more pragmatic perspective. This paper reports on reviewing existing technological solutions for older adults, which span the work life, life in the community, and wellbeing at home. We analyzed 50 different solutions to uncover both negative and positive features of these solutions from the perspective of the impact of technology adoption on the quality of life of older adults. Our approach harnesses holistic reasoning to determine the most suitable technologies available today and provides suggestions for improvement toward designing and implementing better solutions

Modeling and calculation of temperature distribution along the length of a wire studying problems the capacity of power transmission lines near contact connections

The article has obtained an analytical solution to the thermal conductivity equation for the contact connection of long sections of overhead lines, and also considered the case for a line with two short and two long sections, which makes it possible to take into account distributed defects and clamp sizes. The application of the obtained mathematical model to determine the temperature of an overhead power line near contact connections is shown. A comparative analysis of the temperature values in the power line, calculated using the created mathematical model, with published data obtained based on finite element modeling using the results of a physical experiment is performed. It has been shown that heating of contact connections can significantly limit the throughput of lines even at an acceptable level of contact resistance. This makes relevant the tasks of calculating the temperature of contact connections of power lines and clarifying permissible currents taking into account the influence of transient contact resistances

Arthroscopically Monitored Dynamic Osteosynthesis in Closed Patella Fractures

The study is based on the experience of treatment of 52 patients with closed transverse and oblique-transverse fractures of the patella. The problems of diagnosis and treatment of patella fractures with moderate (not more than 5 mm) displacement of fragments are considered. After X-ray exclusion of the severe injury of soft-tissue component of extensive complex of the knee joint the arthroscopy, joint washing from blood, reposition of fragments by instruments, percutaneous dipped osteosynthesis using pins and tightened wired loop quided subfascially are performed. That method was applied in 14 patients. Long term results are studied in 12 patients: complete early restoration of knee function is observed in all cases.</jats:p

The analysis of continuous admissible currents and active power losses in overhead power lines taking into account climatic factors

Formulas for calculating continuous admissible currents and active power losses for overhead power transmission lines under conditions of natural and forced convection for insulated and non-insulated conductors are presented. The correct determination of maximum current loads plays an important role in the efficient use of the load capacity of power transmission lines, and the refinement of the calculation of active power losses is the basis for increasing the efficiency of energy transmission. The results obtained can be used in the selection of measures aimed at increasing the capacity of overhead lines and reducing energy losses

Osteosynthesis with arthroscopic control in fractures of tibial condyles

Modern opportunities of the arthroscopic surgery in intra-articular knee injuries (including fractures) are described; the advantages of arthroscopic method are shown. Authors give the precise description of reposition and osteosynthesis technique in various types of tibial plato fractures. Principles of postoperative and rehabilitation management are given. Authors consider the restoration of knee ligament tears in intra-articular fractures. Meniscus repair and collaterall ligaments reconstruction should be done in acute period of injury. Arthroscopic autoplasty of anterior cruciate ligament should be performed not earlier than 4 months after injury and prior ostheosynthesis. The results of the treatment of 27 patients allow to recommend the osteosynthesis of the tibial condyle with arthroscopic control for the wide clinical practice.</jats:p

Arthroscopic anterior cruciate ligament (ACL) reconstruction

Arthroscopic transtibial ACL reconstruction has been frequently employed (38 cases) in our clinic practice since 1994. Details of the operative technique, special surgical instruments, post-opetative management and rehabilitation are described. Of all available grafts, we prefer free autografts from the middle third of the contralateral patellar ligament, with bone blocks at both ends (bone-tendon-bone). Our experience confirms the advatages of intracanal fixation with interference screws over the methods. Long term follow-up was available in 33 of the 38 patients, of which 32 had good or excellent results and one with an unsatisfactory outcome. This method can be recommended for the patient with an ACL deficient knee.</jats:p

Losses of electrical energy in electrical networks

This article discusses the relevance of reducing electrical energy losses. The actual values and plans for reducing electric energy losses in PJSC «Rosseti» and the main branches of PJSC «Rosseti Siberia» are given. The existing standards of losses in electrical networks of different voltage levels are presented. Possible ways of reducing electricity losses to achieve the targets set by the «Energy Strategy of the Russian Federation for the period up to 2035» are considered

Power management of variable capacitors in electrical grid systems according to the criterion of mini-mum energy loss

The aim is to manage the transmitted reactive power in electrical grids using variable capacitor batteries according to the criterion of minimum energy loss under different annual reactive load schedules and different numbers of variable capacitor sections. The main theoretical relations were obtained by the methods of mathematical modelling and integral calculus using the theory of optimal control. The influence of the power and number of sections in a capacitor battery on energy losses in the grid was estimated using computational experiments. Dependencies for energy losses in a capacitor battery, as well as for reducing energy losses in the grid, were obtained. These expressions are valid for linearized load schedules. It is shown that the dependences of energy losses in a capacitor battery and the reduction of losses in the grid on the section power have inflection points and pass through a maximum. The presence of inflection points is associated with a change in the number of capacitor sections operating throughout the year. The presence of a maximum is explained by the fact that, with an increase in the power of the capacitor battery, its operating time decreases under the complete number of variable sections. It is established that the batteries of static capacitors with two variable sections can reduce energy losses when transmitting reactive power by over 90%. For three- and four-section static capacitors, the loss reduction is close to 100%. The reduction in energy losses increases when approaching maximal levels of annual reactive load. Energy losses in electrical grid systems can be reduced by capacitor batteries with no more than three or four variable sections. In most cases, this can be achieved by two-section capacitor batteries.</jats:p