DEVELOPMENT OF A REPEATER FOR A DEVICE FOR MONITORING CHANGES IN THE COMPOSITION OF THE AIR ENVIRONMENT

This work is part of a project to create a device for monitoring changes in the composition of the air environment. The article describes the main elements of the repeater unit included in the measuring device. The results of modeling the developed band-pass filter, which is part of the waveguide path of the repeater, are presented. Experimental studies of the filter and circulator parameters are also carried out. The technical capabilities of the electronic part of the repeater unit, namely microwave amplifiers and a controlled phase shifter, are described.

On the limit of the accuracy of timе stamp at the detection of annihilation γ-quanta with a scintillation detector

An influence of the various relaxation processes of the electronic excitations causing the scintillation in the crystalline compounds under ionising radiation is analysed. It was found that the intracenter relaxation of electronic excitations in the luminescence ion forms a physical limit for the time resolution of the scintillation detector. The limit of the time resolution, which can be provided when measuring the ionising radiation with a scintillation detector, has been established by simulation. A comparison of the time resolution limits for various errors by the electronic part of the ionising radiation detector is performed. It is shown that inorganic scintillation materials based on single crystals activated by cerium ions have a limit of 10 ps, while self-activated scintillators with low yield and short scintillation kinetics may show results not worse than 20 ps. It has been demonstrated that a further increase in the scintillation yield while keeping the short kinetics in self-activated materials can provide a better time resolution in comparison with Ce-activated materials in future detectors.

6 Monopole Elements Array Intelligent Antennas for IoT Based Environmental Surveillance Network

Three types of 6 monopoles array intelligent antennas was numerically and practically examined. The main purposes of the investigation is to guarantee that those designed antennas are feasible to implement and to install in a particular IoT based environmental surveillance network configuration. The basic differences of the three intelligent antennas lied on the frequency operations (i.e. 433 MHz, 875-915 MHz and 2.5 GHz) and the actual environment operations (whether for indoor or outdoor). The extreme differences of such frequency operations, of course, affecting the differences on the whole antenna physical dimension. The higher the frequency operation determined then the smaller the physical size of the designed antennas produced. However, the deep intelligent antenna evaluations presented in the paper is the one that operated on frequency band of 875 -915 MHz. The intelligent electronic part of six monopole wire elements arrayed on a circular ground plate was composed of LoRa chip module, Android Uno microcontroller, and the switching network part. The three parts determined whole antenna operation throughout the IoT network. The results of whole antenna examinations are thoroughly discussed in the paper.

Model pengendalian kualitas produk cover bottom (electronic part) menggunakan metode lean six sigma

Company shall give full attention to the quality of the products. In the electronics industry, quality control is the key to gain the loyalty of the customer. This is the basis for making improvement at the production activities, especially in controlling the quality in order to reduce the problem of scratch on the cover bottom using the six sigma DMAIC method. The purpose of this research is to analyze the factor that will cause defect to the product. The aimed target is to reduce the lower problem of defective products cover bottom 50%, it also to get the best result where previous defective products amounted to 8183 ppm has downed to 291 ppm and the level of the previous sigma 3,89σ rose to 4,94σ, the target is 4,14σ. This was result an exceed achievement from the Company’s target more than 50%. Six Sigma is the most effective tools at the present time, this will affect to eliminate defects, cut the time of making the product, eliminate unnecessary costs and the principal concept of science to support the sustainability of business which is focused on improving quality and customer satisfaction. The key success of improving quality depends on the ability to identify and solve the problems. This application may be useful and align with the company's philosophy, so that it can be expected to get the final outcome of the company.

Michelson Interferometer Mirror Shift Method for Femtosecond Pulse Studies

In this paper is considered the autocorrelator of ultrashort pulses based a Michelson interferometer, his schemes and operating principles. The method of measuring ultrashort pulses is given. The schemes and principles of operation of the main nodes of the autocorrelation receiver are presented: the optical-mechanical part (the construction of the Michelson interferometer) and the electronic part, which includes a photodetector module, a control and data processing unit with a speaker amplifier, and a personal computer.

The house that is here but is not that: On the Lonesome Skyscraper by Ivana Ognjanović

This paper interprets the piece Lonesome Skyscraper for orchestra and electronics (2012) by Ivana Ognjanović, relying on the theoretical essay about the composition given by the author herself. Inspired by the fate of the tallest residential building in Pécs, which was evacuated because of a construction error and left abandoned and isolated for almost 30 years, I. Ognjanović creates an organic sound unity by connecting various ambient (field recordings) and concrete sounds in the electronic part with responses coming from the orchestral part. Using the time stretching technique, suspending the melodic component, and avoiding the formal and motivic development, the author builds her own version of the skyscraper, an acoustic space through which the memory of the sonic environment is howling.