X-ray beam monitoring and wavelength calibration using four-beam diffraction

Rigorous dynamical theory calculations show that four-beam diffraction (4BD) can be activated only by a unique photon energy and a unique incidence direction. Thus, 4BD may be used to precisely calibrate X-ray photon energies and beam positions. Based on the principles that the forbidden-reflection 4BD pattern, which is typically an X-shaped cross, can be generated by instant imaging using the divergent beam from a point source without rocking the crystal, a detailed real-time high-resolution beam (and source) position monitoring scheme is illustrated for monitoring two-dimensional beam positions and directions of modern synchrotron light sources, X-ray free-electron lasers and nano-focused X-ray sources.

ALGORITHMS FOR OBJECT POSITION MONITORING ON THE SEA SURFACE USING MONOCULAR VIDEO CAMERA

The article proposes new algorithms for estimating the coordinates of objects (both linear and angular) relative to the coordinate system related to the video camera. A two-step algorithm is proposed. At the first stage, the processing of images coming from the camera is performed – the selection of an area be-longing to the sea surface in the image, the detection and video tracking of objects, the determination of azimuth and elevation angles from the obtained images. Our approach is based on the representation of elevation and azimuth angles in the form of non-stationary autoregression models, recurrent estimation of their parameters and subsequent estimation of the object coordinates.

Mobile-based Activity Monitoring System for the Self-quarantine Patient

Nowadays, not all the patient can be hospitalized because of the COVID-19 pandemics. So, the self-quarantine for the patient with the various diseases will be the given solution by the hospital. It would make the hospital needs a system that can monitor the activity and the position of the patient from a distance. Nowadays, mobile phone is equipped by the sensor that can detect the user movement. Not only the user’s position, but also the user’s activity. In this paper, it will be developed an activity and position monitoring system for the self-quarantine patient that can be used in their home. The mobile activity monitoring can be achieved by activity recognition using classification method. For the needs of performance testing, we evaluate some classification method for activity recognition to compare the among classification method for the activity recognition. Some tested classification methods are Naïve Bayes, KNN, KStar and TreeJ48. Furthermore, we tested the impact of sliding windows per N samples taken to the accuracy of the activity recognition. We choose the best N sample that could give the best accuracy for activity recognition. The system not only monitor the patient’s activity, but also the patient’s position. The position monitoring can be achieved using Google Maps API. The result is Naive bayes has the accuracy of 81.25%, KNN has the accuracy of 78.125%, KStar has the accuracy of 78.125% and TreeJ48 has the accuracy of 75%. The N sample that could give the best accuracy is 6 with the accuracy of 90.15%.

Research on the Awareness and Application of Strategic Management Accounting Instruments in Lithuanian Companies

In recent decades, as the newly created internal and external environment conditions have radically changed the environment of business, the process of creating and implementing business strategy became more relevant. The data, generated by strategic management accounting, makes this process more efficient. The article examines the concept of the strategic management, its importance and related instruments. The article provides results of the research carried out to determine the level of awareness and application of strategic management accounting instruments in Lithuanian companies. Empirical research has shown that the level of awareness and application of the strategic management accounting instruments in Lithuanian companies is minor. The most common strategic management accounting instruments are as follows: customer profitability analysis, benchmarking, competitive position monitoring, strategic pricing, and strategic costing. The least known and, according to the research, the least applicable strategic management accounting instruments are: attribute costing, product life cycle accounting and brand value budgeting. According to the study, the most significant reason for the difficulties in implementing strategic management accounting instruments is the lack of time required to implement the instruments.