Multi-channel hardware and software complex for monitoring and analysing vibrosignals

The description of complex construction and operation principles for vibrosignal analysis is presented. The distinguishing feature of the complex is application of the wavelet analysis method. Peculiarities of wavelet transformation when solving the problems of mechanical system vibrodiagnostics in comparison with the Fourier analysis are shown. Hardware and software model of measuring complex has been created; its tests have been carries out

Improvement of the efficiency of vehicle inspection and maintenance programs through incorporation of vehicle remote sensing data and vehicle characteristics

Emissions from light-duty passenger vehicles represent a significant portion of total criteria pollutant emissions in the United States. Since the 1970s, emissions testing of these vehicles has been required in many major metropolitan areas, including Atlanta, GA, that were designated to be in non-attainment for one or more of the National Ambient Air Quality Standards. While emissions inspections have successfully reduced emissions by identifying and repairing high emitting vehicles, they have been increasingly inefficient as emissions control systems have become more durable and fewer vehicles are in need of repair. Currently, only about 9% of Atlanta area vehicles fail emissions inspection, but every vehicle is inspected annually. This research addresses explores ways to create a more efficient emissions testing program while continuing to use existing testing infrastructure. To achieve this objective, on road vehicle emissions data were collected as a part of the Continuous Atlanta Fleet Evaluation program sponsored the Georgia Department of Natural Resources. These remote sensing data were combined with in-program vehicle inspection data from the Atlanta Vehicle Inspection and Maintenance (I/M) program to establish the degree to which on road vehicle remote sensing could be used to enhance program efficiency. Based on this analysis, a multi-parameter model was developed to predict the probability of a particular vehicle failing an emissions inspection. The parameters found to influence the probability of failure include: vehicle characteristics, ownership history, vehicle usage, previous emission test results, and remote sensing emissions readings. This model was the foundation for a proposed emissions testing program that would create variable timing for vehicle retesting with high and low failure probability vehicles being more and less frequently, respectively, than the current annual cycle. Implementation of this program is estimated to reduce fleet emissions of 17% for carbon monoxide, 11% for hydrocarbons, and 5% for nitrogen oxides in Atlanta. These reductions would be achieved very cost-effectively at an estimated marginal cost of $149,$7,576 and $2,436 per-ton-per-year for carbon monoxide, hydrocarbons, and nitrogen oxides emissions reductions respectfully.Ph.D

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

One of the most important environment monitoring problems is the detection of oxidizing gases in the ambient air. Negative impact of noxious oxidizing gases (ozone and nitrogen oxides) on human health, sensitive vegetation, and ecosystems is very serious. For this reason, palladium (II) oxide nanostructures have been employed for oxidizing gas detection. Thin and ultrathin films of palladium (II) oxide were prepared by thermal oxidation at dry oxygen of previously formed pure palladium layers on polished poly-Al2O3, SiO2/Si (100), optical quality quartz, and amorphous carbon/KCl substrates. At ozone and nitrogen dioxide detection, PdO films prepared by oxidation at T = 870 K have demonstrated good values of sensitivity, signal stability, operation speed, and reproducibility of sensor response. In comparison with other materials, palladium (II) oxide thin and ultrathin films have some advantages at gas sensor fabrication. Firstly, for oxidizing gas detection, PdO films with p-type conductivity are more perspective than the material with n-type conductivity. Secondly, at ambient conditions, palladium (II) oxide is insoluble in water and does not react with it. These facts are favorable for the fabrication of gas detectors because they make possible to minimize the air humidity influence on PdO sensor response values. Thirdly, the synthesis procedure of PdO films is rather simple and is compatible with planar processes of microelectronic industry

ЭКСПЕРИМЕНТАЛЬНО-МОРФОЛОГИЧЕСКОЕ ОБОСНОВАНИЕ МИКРОХИРУРГИЧЕСКИХ ИНВАГИНАЦИОННЫХ ПИЩЕВОДНО-ЖЕЛУДОЧНЫХ АНАСТОМОЗОВ

New ways of formation of microsurgical invagination late-side and end-terminal esophago-gastric anastomoses in the resection of the esophagus and cardia stomach are proposed in the experiment on animals. Objects of the experiment are 24 purebred dogs. Experimental approbation of microsurgical invagination PGA demonstrated the feasibility, reliability and high functionality of ways. The microsurgical techniques, single row of continuous seam without capture mucosa when creating anastomoses, allows to improve the immediate and distant results of operations. Anastomoses have high antireflux properties that due to constructive features, due to the inclusion in the anastomosis zone of duplikatory of alternate layers of muscles of the esophagus and stomach, forming an artificial sphincter, which is confirmed by the functional and morphological methods of research.Предложены новые способы формирования микрохирургических инвагинационных концебоковых и концеконцевых пищеводно-желудочных анастомозов (ПЖА) при резекции пищевода и кардии желудка в эксперименте на животных. В качестве объекта эксперимента были использованы 24 беспородные собаки. Экспериментальная апробация микрохирургических инвагинационных ПЖА показала выполнимость, надежность и высокую функциональность способов. Применение микрохирургической техники, однорядного непрерывного шва без захвата слизистой оболочки при создании соустий позволяет улучшить ближайшие и отдаленные результаты операций. Анастомозы обладают высокими антирефлюксными свойствами, которые обусловлены конструктивными особенностями за счет включения в зону анастомозов дупликатуры разнонаправленных слоев мышц пищевода и желудка, образующих искусственный сфинктер, что подтверждено функциональными и морфологическими методами исследования

Development of Hydrometallurgical Process of Non-Ferrous and Rare Metals Recovery from Untraditional Mineral Raw Materials and Natural Brines

In connection with gradual lowering of supplies of tradit- ional ore raw materials involving non-ferrous and rare metals, winch is treated by well-known technologies, invo-lving into the production of untraditional, secondary and technogeneous raw materials appears to be actual task

The effectiveness of the use of various methods of shock wave therapy in the complex treatment of athletes with lateral epicondylitis

The purpose of the study: to evaluate the effectiveness of various methods of shock wave therapy in the complex treatment of athletes with lateral epicondylitis.Materials and methods: the study involved 122 people. with a diagnosis of Lateral epicondylitis, aged 20 to 45 years, of which 55 (45.1 %) women and 67 (54.9 %) men. All patients were divided into 4 groups: a control group, which included 28 people who underwent standard treatment, and 3 groups, a total of 94 people, who underwent shock wave procedures using various methods against the background of standard treatment. The examination included the collection of complaints, anamnesis, physical examination, assessment of the function of the upper limb using the QuickDASH questionnaire, assessment of tennis elbow using the PRTEE questionnaire, carpal dynamometry was performed on a MEGEON-34090 dynamometer, and statistical methods. All studies were conducted before, after treatment, as well as after 3 weeks and 1 month. after treatment.Results: shockwave therapy applied to tendons, flexors of the hand, and triceps brachii outperformed shockwaves to tendons or tendons and flexors of the hand in terms of Upper Limb Functional Activity (DASH) (p < 0,05) and score tennis elbow (PRTEE) (p < 0,05) after 3 weeks and after 1 month after treatment.Conclusion: reducing the severity of pain syndrome and functional disorders of the upper limb when performing various types of activities, when conducting shock wave therapy on the area of the tendons, flexor muscles of the hand and the triceps muscle of the shoulder indicates a faster recovery of the functions of the upper limb, which is especially important for athletes

Lateral epicondylitis: tendinitis or tendinosis?

Lateral epicondylitis is a common pathology of the musculoskeletal system resulting from repeated microtrauma of the extensor muscles of the forearm and their tendons. Lateral epicondylitis was previously thought to be tendinitis, which is an inflammatory reaction in the tendon. However, histopathologically, it has been shown to be low in inflammatory elements: macrophages and neutrophils. Thus, it is now believed that this pathology is a tendinosis, which is defined as a degenerative rather than an inflammatory process