<abstract xmlns="http://www.w3.org/1999/xhtml">

Broadband dielectric spectroscopy (BDS) is a method of characterizing matter from the perspective of its dielectric parameters, which varies depending on the frequency of the applied electromagnetic field. During recent years, along with its many uses, there has been an increase in interest in the use of the method in biomedical fields, especially for the characterization of normal and tumor cells. In this context, this review aims to address in the first part the theoretical bases and mathematical models that explain the principle of operation of the broadband spectroscope. Subsequently, the advantages and limitations of the method are detailed, including the difficulties that the researcher may encounter in the case of working with living cells. Finally, the most important scientific results obtained on normal and pathological cell cultures are presented, possible future research directions being suggested.
</abstract>

University of Medicine and Pharmacy “Gr. T. Popa” Iași

“Gheorghe Asachi” Technical University of Iaşi

Broadband Dielectric Spectroscopy and Its Role in the Characterization of Biological Cells

<abstract xmlns="http://www.w3.org/1999/xhtml">

The maritime industry makes a significant contribution to the globalized economy. One of the most important parts of the maritime industry is transport. Maritime transport by ships is the dominant means of transport for industrial products and food. Modern ships are increasingly automated. A characteristic feature of automation systems is the use of distributed monitoring and control systems with large distances between field devices and controllers. Among many methods of signal transmission, both in measurement and control, the dominant role in related to continuous signals is played by the two-wire 4-20 mA current standard. Despite its advantages, this standard has limitations mainly due to one-way transmission of information representing one measurement quantity. Programmable transducers are an alternative to analogue solutions. This carried out research concentrates on the full assessment of the properties of the considered methods of information transmission used so far with particular reference to the two-wire 4-20 mA standard. This assessment also takes into account the negative factors characterizing the sea-going ships, such as environmental conditions or problems resulting from the use of an isolated power grid. Additionally, a description of the available digital methods used for communication in ship automation systems will be presented. Firstly, description will be provided for HART protocol (Highway Addressable Remote Transducer), Foundation Fieldbus, Profibus PA and Modbus as communication protocols adopted by modern smart transducers as alternatives for classical analogue 4-20 mA transducers. Moreover, serial communication interfaces such as RS232, RS422 and RS485 will be discussed as means of communication between automation stations. In order to demonstrate the positive contribution for smart transmitters in measurement and control process, an experimental research has been conducted at the laboratories of Gdynia Maritime University, results of which will be discussed in detail in this article. Eventually, illustration will be provided for tank level measurement systems on a commercial ship as an example for measurement and control system mainly based on classical 4-20 mA current signal. Description will be provided for the problems associated with the system and their causes. Based on the conducted discussions, there will be recommendations of suggested solutions for such problems.
</abstract>

Digital Communication Links Cooperating with the Analog 4-20 mA Standard for Marine Applications

<abstract xmlns="http://www.w3.org/1999/xhtml">

The paper presents a cascade of preprocessing procedures aiming at enhancing the quality of images generated by gas-chromatography ion mobility spectrometers (GC-IMS). The methods successfully eliminate the Reactant Ion Peak (RIP) lines, while additionally filtering out noisy components. The resulting images enable better localization and matching of the peaks associated with the presence of distinct analytes in the samples under study.
</abstract>

“Gheorghe Asachi” Technical University of Iași

Depart. for Automation in Medicine and Biotechnology

Preprocessing Methods for GC-IMS Image Analysis

<abstract xmlns="http://www.w3.org/1999/xhtml">

Custom power devices are generally used to power sensitive consumers who need higher energy quality. This paper will exemplify some of the custom power devices used in distribution networks. The case study will highlight the solid-state current limiter effects on an electrical network by simulating a medium voltage network. By installing a solid-state current limiter, the value of the short-circuit current decreases; thus, the electrodynamic forces and thermal stresses supported by the components of the electrical network are reduced.
</abstract>

Aspects Regarding the Use of Electronic Power Devices in Power Grid

<abstract xmlns="http://www.w3.org/1999/xhtml">

The paper presents a possibility to determine the electrical patterns for the electrical loads through nonintrusive monitoring of their operating regimes.
The electrical patterns are determined on the basis of the electrical parameters acquired for each load from the electrical network analysed. The determination of the electrical patterns is useful for the management of electrical energy consumption.
The easiness of the nonintrusive monitoring technique is determined by the possibility of acquiring the electrical parameters from a single measurement point from the electrical network. From the electrical parameters acquired can be obtained information for electrical loads consumption recognition and their operating regimes, for certain time intervals, and it can be established the technical condition for each load.
</abstract>

Nonintrusive Electrical Loads Pattern Determination

<abstract xmlns="http://www.w3.org/1999/xhtml">

Nonlinear systems with hyperchaotic dynamical behaviour are studied for applications in complex measurement, modulation and encryption. Unidimensional signals resulting from medical tests can be securely transmitted using chaotic encryption. The present paper analyses synchronization of hyperchaotic systems applied in secure communication. The resulting emitter-receiver pair performance is presented from both dynamic and statistic points of view. Possible application in biomedical signal transmission is analyzed by computer simulations.
</abstract>

“Gheorghe Asachi” Technical University of Iaşi, Faculty of Electronics

“Gr. T. Popa” University of Medicine and Pharmacy of Iaşi

Hyperchaotic Modulation for Secure Biomedical Signal Transmission

AHEAD OF PRINT

Volume 68 (2022): Issue 4 (December 2022)

Volume 68 (2022): Issue 3 (September 2022)

Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section

Volume 67 (2021): Issue 4 (December 2021)

Volume 67 (2021): Issue 3 (September 2021)

Volume 67 (2021): Issue 2 (June 2021)

Volume 67 (2021): Issue 1 (March 2021)

 The journal Buletinul Institutului Politehnic din Iaşi, Electrotehnicã. Energeticã. Electronicã (Bulletin of thE Polytechnic Institute of Iasi, Electrical Engineering, Power Engineering, Electronics section) is publishing papers that present the research work in the broad area of Electrical Engineering, Power Engineering, Electronics, Automatic Control and Computer Science. The proposed topics of the published papers cover not only classical fields of Electrical and Computer Engineering Science, but also subjects in areas that show a rapid process of maturation. The journal is an effective mean of disseminating the recently obtained results, of promoting interdisciplinary research and also an opportunity for young researchers to present their relevant scientific work.  Authors are invited to submit papers to one of the following subject areas: Electrical Engineering Power Engineering Electronics Automatic Control Computer Science  The journal Buletinul Institutului Politehnic din Iaşi, Electrotehnicã. Energeticã. Electronicã is publishing mainly original research but, good quality focused review articles that scrutinize state of art, that highlight newly emerging trends or propose future directions for developing areas, are also welcomed after consulting the editor.  All articles are subject to a blind review assessing the content, scientific relevance, novelty and originality of research, quality of presentation, text structure and style, referencing, and the overall contribution of the article. Based on the review, the editor reserves the right to reject the paper or request the author to adjust it according to the reviewers suggestions.  The journal Buletinul Institutului Politehnic din Iaşi, Electrotehnicã. Energeticã. Electronicã is jointly coordinated by the Faculty of Electrical Engineering, Faculty of Electronics, Telecommunications and Information Technology and Faculty of Automatic Control and Computer Engineering of “Gheorghe Asachi” Technical University of Iași.  Plagiarism and Archiving Policy  Archiving  Sciendo archives the contents of this journal in System's Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 