Synchronization conditions in networks of Hindmarsh-Rose systems

The algebraic connectivity is crucial parameter in studying of synchronization of diffusively coupled networks. This paper studies the synchronization in networks of Hindmarsh-Rose systems, which is one of the most used neuron models. It presents sufficient condition for synchronization in these networks using the Lyapunov function method. This is a simple condition which depends on the algebraic connectivity and on the parameters of the individual system. Numerical examples are presented to illustrate the obtained results.

Inter-annual and intra-seasonal variation of some characteristics of monsoon disturbances formed over the Bay

The characteristics of monsoon disturbances during drought and flood years for the period 1971-96 are studied to find out their inter-annual variations. Variations of some of the characteristics of monsoon disturbances formed over Bay during 1979-88, with respect to different monsoon conditions such as strong, weak and break monsoons, are also studied. The results show that monsoon disturbance days are higher during flood years than during drought years. Drought years are associated with higher chances of low pressure areas to intensity into depressions, less westward movement, more horizontal extent, intense pressure departure from normal in comparison with flood years. However, more monsoon disturbances tilt significantly during flood years. The rainfall associated with these disturbances is highly variable and does not depend on the density, horizontal and vertical extent of the individual system. More number of lows intensify into depressions during strong monsoon conditions compared to those of weak monsoon conditions. Lows and depressions during strong monsoons have more westward movement and longer life period. Generally, very few lows form during break monsoon and none of them intensify into depression. Hence, the presence of mid-tropospheric heating during strong and weak monsoons is essential for the formation of depression. Synoptic systems which abate break monsoon condition and re-establish normal monsoon are also discussed.

Demographics of Exoplanets in Binaries. I. Architecture of S-type Planetary Systems Revealed by the Radial-velocity Sample

Although the sample of exoplanets in binaries has been greatly expanded, the sample heterogeneity and observational bias are obstacles toward a clear figure of exoplanet demographics in the binary environment. To overcome the obstacles, we conduct a statistical study that focuses on S-type (circumstellar) planetary systems detected by the radial-velocity (RV) method. We try to account for observational biases by estimating, from available RV data, planet detection efficiencies for each individual system. Our main results are as follows. (1) Single (resp. multiple) planetary systems are mostly found in close (wide) binaries with separation a B < (>) ∼ 100–300 au. (2) In binaries, single and multiple-planet systems are similar in 1D distributions of mass and period as well as eccentricity (in contrast to the “eccentricity dichotomy” found in single star systems) but different in the 2D period-mass diagram. Specifically, there is a rectangular-shaped gap in the period-mass diagram of single-planet systems but not for multiples. This gap also depends on binary separation and is more prominent in close binaries. (3) There is a rising upper envelope in the period-mass diagram for planets in wide binaries as well as in single stars but not in close binaries. More specifically, there is a population of massive short-period planets in close binaries but almost absent in wide binaries or single stars. We suggest that enhanced planetary migration, collision and/or ejection in close binaries could be the potential underlying explanation for these three features.

Studying reliability of marine pump systems by using technical supervision data

The article describes the analysis of the ship systems’ reliability at the stage of the technical design, which is based on the reliability data of individual system elements and mathematical methods of reliability theory. During the ship operation maintenance deficiencies can lead to the equipment failure, which can be prevented by the methods of instrumental diagnostics of system elements, maintenance repairs regardless of the current technical condition, and classification inspection during the ship operation. Collecting the detailed data on changes in the functional reliability of ship mechanical systems, which could confirm or deny the advantages of each of the existing methods is not enough. There has been carried out collecting, processing and analyzing the actual data on the life cycles of various pumps of ship systems at different stages of service life, as well as beyond the designated service life or operating time. There are examined the general ship systems and auxiliary power units of icebreakers and floating structures. The examined equipment has standard pumps with different capacity and efficiency. Service life, assigned resource (operating time), frequency of repair are taken as the criteria of pump reliability and durability. There have been shown the actual life cycles of pumps in dependence of the service life in years on the operating time in hours; in addition, data on the passage of maintenance repairs, maintenance, inspection of the technical condition, as well as replacement or extension of the service life are plotted on the graphs. It has been inferred that some of the pumps in the ship's systems should be replaced before the full resource was developed, while the performance of the systems as a whole was preserved or restored as a result of repairs; some pumps have exceeded their specified resource, but during the technical inspection their operation was extended, the operability of the systems was also preserved.

A Uniform Search for Nearby Planetary Companions to Hot Jupiters in TESS Data Reveals Hot Jupiters Are Still Lonely

We present the results of a uniform search for additional planets around all stars with confirmed hot Jupiters observed by the Transiting Exoplanet Survey Satellite (TESS) in its Cycle 1 survey of the southern ecliptic hemisphere. Our search comprises 184 total planetary systems with confirmed hot Jupiters with R p > 8 R ⊕ and orbital period <10 days. The Transit Least Squares algorithm was utilized to search for periodic signals that may have been missed by other planet search pipelines. While we recovered 169 of these confirmed hot Jupiters, our search yielded no new statistically validated planetary candidates in the parameter space searched (P < 14 days). A lack of planet candidates nearby hot Jupiters in the TESS data supports results from previous transit searches of each individual system, now down to the photometric precision of TESS. This is consistent with expectations from a high-eccentricity migration formation scenario, but additional formation indicators are needed for definitive confirmation. We injected transit signals into the light curves of the hot Jupiter sample to probe the pipeline’s sensitivity to the target parameter space, finding a dependence proportional to R p 2.32 P − 0.88 for planets within 0.3 ≤ R p ≤ 4 R ⊕ and 1 ≤ P ≤ 14 days. A statistical analysis accounting for this sensitivity provides a median and 90% confidence interval of 7.3 − 7.3 + 15.2 % for the rate of hot Jupiters with nearby companions in this target parameter space. This study demonstrates how TESS uniquely enables comprehensive searches for nearby planetary companions to nearly all the known hot Jupiters.

MANAGEMENT OF TRANSPORTATION AND TECHNOLOGICAL EQUIPMENT OF THE INDUSTRY BASED ON THE SMART SYSTEM

High productivity and power of technological and transport mechanisms, large capacity and number of storage equipment, a variety of types of grain crops simultaneously processed at the elevator require the operator to make a lightning-fast decision, the optimal choice of grain transportation routes.One of the first control systems consisted of huge energy-intensive cabinets with starting equipment, allowing remote control of equipment, without the functions of elementary control of their operation.As storage volumes increased, these systems were supplemented with relay cabinets, whose task was to conduct interlocked control of an ever-increasing number of mechanisms, so that at least somehow it was possible to control such a complex. These relay cabinets had a low degree of reliability (contact elements), consumed a large amount of energy, and required the constant presence of large maintenance personnel.The era of microelectronics has come, which completely changed the idea of the capabilities of control systems. At first, it seemed very expensive and not a quick payback. But every year, the cost of automation equipment is decreasing, reliability has grown to high levels and this technique has come to the management systems of grain storages and elevators.Modern automation at the majority of Ukrainian elevators makes it possible to control technological processes. At the same time, many processes are regulated in a mode that requires a sufficiently high qualification of service personnel. The exchange of data on the operation of SMART-INDIVIDUAL equipment is carried out by logical controllers by polling sensors, generating control actions, monitoring equipment operating modes with display in the WEB-interface system. The SMART-INDIVIDUAL system has undeniable advantages over existing centralized control and management systems. SMART technology is inextricably linked with the dispatch control and data collection system - SCADA, designed to monitor and supervise a large number of remote objects or one geographically distributed object. The SMART-INDIVIDUAL system is equipped with a module with a regulation for monitoring parameters, equipment according to the passport characteristics. At the same time, the system maintains an archive and controls the timing of maintenance. The laboratory installation SMART-INDIVIDUAL includes technological and transport equipment, which is most used in the elevator industry: air filter ZEO-FCS, bucket elevator ZEO-BE, scraper chain conveyor ZEO-DC. On the basis of the SMART-INDIVIDUAL software and hardware complex at the Department of Technological Equipment for Grain Production of the Odessa National Academy of Food Technologies, students are trained in the new specialty "IT service of equipment".

Personal Determinants of Emotional Burnout in Students (Future Physical Training Teachers)

Purpose: The purpose of the study is to identify and analyze the manifestations of emotional burnout of future physical education teachers and to determine the role of personal determinants in the formation and overcoming this condition. The purpose was specified in the following tasks: to identify the features of emotional burnout in future physical training teachers; to investigate the relationships between emotional burnout and personal characteristics of students; to find out the differences in the sets of personality characteristics of students of future physical training teachers with different levels of emotional burnout. Design and Methods: The research involved 150 students of the college (18.1±2 years) who study in the specialty “physical training and sports”: the 1st year, n=50; 2nd year, n=32; 3rd year, n=37 and 4th year, n=31). The sample is heterogeneous (61.33% of boys, 38.67% of girls). The Maslach Burnout Inventory (C. Maslach), “Diagnostics of the level of emotional burnout” (V.V. Bojko), the modified form of the FRI questionnaire was employed. Methods of descriptive statistics, Spearman correlation analysis, Kruskal-Wallis one-way analysis of variance and structural analysis (by A.V. Karpov) were used. Mathematical data processing and graphical presentation of the results were carried out using the computer software package of statistical software SPSS 22.0. Results: The article confirms the assumption about the existence of correlation relations between emotional burnout and personal characteristics of future physical training teachers. The statistically significant differences between groups of students with different levels of emotional burnout on the scale of “neuroticism”, “spontaneous aggression”, “depression”, “emotional lability”, “irritability”, “reactive aggression”, “openness” that are more common to future teachers with high level of emotional burnout are revealed. It is empirically proven that students with different levels of emotional burnout characterized by various structural organizations of personality characteristics, and also that the growth of indicators of the emotional burnout formation is accompanied by a qualitative restructuring of the personality characteristics. Conclusions: The obtained data contributes to the study of the phenomenon of burnout and provide an opportunity to identify further directions of its prevention and correction among future physical training teachers. Subsequent studies will be aimed at developing an individual system of psychological training and support for the prevention and correction of emotional burnout among students.

A Model of Life Cycle on Biogas Feed to Solid Oxide Fuel Cell in Malaysia: Economic and Environmental Perspective

Abundant of palm oil waste creates huge potential in producing biogas. Technically, biogas can be fed as an input gas into the fuel cell system to get the electricity output. This paper aims to estimate the life cycle costs and environmental impact for the biogas feed to the solid oxide fuel cell system in two different models: Individual System and Centralized System. Then the system boundary-setting starts from palm oil plantation until the fuel cell system. The result indicates that the individual system is more efficient due to lower cost and emission compared to the centralized system. Life cycle cost for the individual and centralized system is RM 2.56 / kWh and RM 7.04 / kWh, respectively. Then the carbon dioxide emissions are 0.2034 CO2-EQ / kWh and 0.61 CO2-EQ / kWh. Hopefully, the outcome from this paper will be able to assist the decision-maker in planning to model the fuel cell combining with biogas system in the future. Apart from that, its objective is to focus on cost-efficient and more sustainable electricity generation.

“En garde – un, deux!”: Military Sabre Fencing in Nineteenth-century Switzerland

This article presents recent research into military fencing in Switzerland, with a focus on manuals and regulation written to help instructors teach sabre fencing in Swiss officers’ schools. The publications discussed here, essentially sabre fencing manuals, can be grouped into a unique corpus based on the only official regulation for sabre fencing. They are interesting elements that can help scholars to understand not only the teaching and practice of fencing inside the infantry officers’ schools, but also the more technical aspects of an individual system: all publications in the corpus are part of the same system, although with minor variations. The system, called Contre-pointe (or Stichsäbel in some of the publications), is similar to others in France and elsewhere in Europe. Another central part of the system was its sportive aspect and use in military and civil competitions. Surprisingly, this meant that infantry officers were taught a type of fencing designed not solely for fighting on the battlefield and arguably more suited for the fencing room.

Development of Balanced Whole System Value Measures for Inflammatory Bowel Disease Care in the IBD Qorus Collaborative Using a Modified Delphi Process

Background The IBD Qorus Collaborative aims to reduce variation and increase the value of care for the adult inflammatory bowel disease (IBD) community. To evaluate the success of the collaborative, we aimed to develop a balanced set of outcome measures that reflect a multistakeholder view of value in IBD care. To achieve this, we used the Clinical Value Compass framework and engaged a mixed-stakeholder group to conduct a modified Delphi process. The end result was a 10-measure set to assess the value of IBD care. Method The modified Delphi process included 3 iterative rounds of blinded voting and interactive webinar-style discussion. We recruited 18 participants for the Delphi panel, including clinicians, researchers, patients, Crohn’s & Colitis Foundation staff, and payers. Participants first identified constructs to measure, then identified the tools to measure those constructs. A literature review and environmental scan of current measures in 4 domains were performed, and relevant measures were proposed for discussion and voting in each domain. Throughout the process, participants were invited to contribute additional measures. Conclusion The modified Delphi process led to selection of 10 value measures across 4 domains: (1) patient experience; (2) functional status; (3) clinical status; and (4) health care costs and utilization. We have successfully completed a 3-stage modified Delphi process to develop a balanced set of value measures for adult IBD care. The value measure set expands upon prior efforts that have established quality measures for IBD care by adding cost and experience of care elements. This work positions IBD Qorus to better assess, study, improve, and demonstrate value at individual, system, and population levels and will inform and empower related research, improvement, and implementation efforts.