Determining the orientation parameters using the mems accelerometer and magnetometer

Для определения положения объекта на поверхности Земли наибольшее распространение получили географические координаты, с помощью которых можно наблюдать ориентацию и навигацию объекта. Информация об ориентации объекта в пространстве является основополагающей для задач навигации этого объекта на Земле [2]. В географической системе координат задача ориентации понимается как определение углового положения относительно горизонтальной плоскости и направления на север. Одним из самых известных устройств, используемых для определения углового положения объекта относительно направления на магнитный север, является магнитный компас. В этой работе будет рассмотрен современный электронный компас, основанный на тр?хосных МЭМС акселерометре и магнетометре.This article describes the temperature control system for a downhole tool. The peculiarity of this system isthat it is using a heater and an active cooler which are controlled by pulse width modulation. The basis of such asystem is taken from the thermostatic scheme of the inclinometer IGN 100-100 / 60-A. However, this scheme hasserious drawback - conducted interference. These disturbances affect the operation of a downhole power supply,and therefore the entire electronic inclinometer instrumentation. This article briefly describes the principle of thetemperature control system. Furthermore, reasons for this interference are discussed in detail, calculated the valueof failures in the selection of power, the graphs clearly show the changes in the signal. The problematic elements ofthe scheme, affecting the appearance of interference, are identified. The possible solutions to eliminate thisinterference are analyzed, stating the shortcomings of each of the solutions

Озеро Гусиное как источник водоснабжения

Рассмотрены проблемы озера Гусиное, как единственного источника питьевого водоснабжения г. Гусиноозерск. Несмотря на это в озеро сбрасываются сточные воды населённых пунктов и промышленных предприятий, таких как Гусиноозерская ГРЭС и угольные разрещзы. Это приводит к заметному негативному влиянию на качество поверхностных вод. The problems of Goose lake as the only source of drinking water supply Gusinoozersk. Despite this the lake is discharged in the waste water of the "Gusinoozerskaya GRES", municipal water Gusinoozersk, which negatively affect water quality in the lake

A 2.1 Solar Mass Pulsar Measured by Relativistic Orbital Decay

PSR J0751+1807 is a millisecond pulsar in a circular 6 hr binary system with a helium white dwarf secondary. Through high precision pulse timing measurements with the Arecibo and Effelsberg radio telescopes, we have detected the decay of its orbit due to emission of gravitational radiation. This is the first detection of the relativistic orbital decay of a low-mass, circular binary pulsar system. The measured rate of change in orbital period, corrected for acceleration biases, is dP_b/dt=(-6.4+-0.9)x10^-14. Interpreted in the context of general relativity, and combined with measurement of Shapiro delay, it implies a pulsar mass of 2.1+-0.2 solar masses, the most massive pulsar measured. This adds to the emerging trend toward relatively high neutron star masses in neutron star--white dwarf binaries. Additionally, there is some evidence for an inverse correlation between pulsar mass and orbital period in these systems. We consider alternatives to the general relativistic analysis of the data, and we use the pulsar timing data to place limits on violations of the strong equivalence principle.Comment: 9 pages, Submitted to Ap

Influence of information technology on homeland security

The modern world is a complexly organized system, a space of global information technologies (IT). Information today is the main determinant of society, and the rapid development of IT, which penetrate into all spheres of our life, opens up completely new opportunities for social progress, as well as certain problems and challenges. Since information technologies are widely used in business, politics, and national development, they have become an attractive target for hacker attacks; as well as a very powerful tool which can threaten state's national security. This paper examines the issue of information technology and its role in homeland security protection, as well as the key problems associated with increasing their influence in the world

Режимы лазерного восстановления оксида графена

Обработка светом (фотолитография) хорошо зарекомендовала себя в твердотельной электронике и на данный момент играет важную роль в микроэлектронной промышленности. С данной точки зрения представляется научный интерес работы по возможностям модификации пленок ОГ для получения гибкой, биосовместимой и "зеленой" электроникиPhotolithography is a powerfull instrument for designing a solid state electronics. Today is plays an important role in the microelectronic industry. Scientific interest of this work is on the possibilities of modifications of the graphene oxide film to obtain flexibility, biocompatible and "green" electronic

Distinguishing Parkinson's disease from atypical parkinsonian syndromes using PET data and a computer system based on support vector machines and Bayesian networks

Differentiating between Parkinson's disease (PD) and atypical parkinsonian syndromes (APS) is still a challenge, specially at early stages when the patients show similar symptoms. During last years, several computer systems have been proposed in order to improve the diagnosis of PD, but their accuracy is still limited. In this work we demonstrate a full automatic computer system to assist the diagnosis of PD using 18F-DMFP PET data. First, a few regions of interest are selected by means of a two-sample t-test. The accuracy of the selected regions to separate PD from APS patients is then computed using a support vector machine classifier. The accuracy values are finally used to train a Bayesian network that can be used to predict the class of new unseen data. This methodology was evaluated using a database with 87 neuroimages, achieving accuracy rates over 78%. A fair comparison with other similar approaches is also provided.This work is part of a project approved by the Andalucía Talent Hub Program launched by the Andalusian Knowledge Agency, co-funded by the European Union's Seventh Framework Program, Marie Sklodowska-Curie actions (COFUND Grant Agreement no 291780) and the Ministry of Economy, Innovation, Science and Employment of the Junta de Andalucía. The work was also supported by the University of Granada (Spain), the University for Munich (Germany), the MICINN (Spain) under the TEC2012–34306 project and the Consejera de Innovacin, Ciencia y Empresa (Junta de Andaluca, Spain) under the P11–TIC–7103 excellence project