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1 – 10 of 46
Article
Publication date: 1 August 2002

O. Aleksić, V. Desnica, M. Luković and Lj.D. Živanov

Thick film symmetrical LC cells with two pairs of terminations were printed on alumina using PdAg paste and crossover dielectric. Planar inductors such as meander, spiral…

Abstract

Thick film symmetrical LC cells with two pairs of terminations were printed on alumina using PdAg paste and crossover dielectric. Planar inductors such as meander, spiral, bispiral, and solenoid in plane were distributed over planar capacitors such as sandwich, interdigitated and segmented. Attenu‐ation and Smith charts of symmetrical EMI LC cells were measured on network analyzer in the range of 1 MHz to 3 GHz. Two or three main LC cells were joined in series to sum attenuation. The obtained results were compared mutually, at first, and than with the cubic (chip) EMI LC filters. The obtained EMI noise suppression was similar, but the filter band of thick film LC cells was much wider.

Details

Microelectronics International, vol. 19 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 31 July 2009

O.S. Aleksic, S.M. Savic, M.V. Nikolic, L. Sibinoski and Lukovic

The purpose of this paper is to apply negative thermal coefficient (NTC) thick film segmented thermistors (TFSTs) in a micro‐flow sensor for water.

441

Abstract

Purpose

The purpose of this paper is to apply negative thermal coefficient (NTC) thick film segmented thermistors (TFSTs) in a micro‐flow sensor for water.

Design/methodology/approach

A TFST is printed using NTC paste based on nickel manganite. The resistance of this thermistor is measured in a climatic chamber and the resulting curves are calibrated. A micro‐flow sensor is designed using a self‐heated segmented thermistor. The sensing principle is based on heat loss depending on the water flow intensity through the capillary. Water flow calibration is performed. The sensor sensitivity, inertia, and stability are analyzed.

Findings

The micro‐flow sensor exhibits good stability, suitable sensitivity, and inertia for integral measurements of water flow.

Practical implications

Advantages of a micro‐flow sensor using a TFST include low energy consumption, simple measuring procedure, and passive electronics.

Originality/value

This paper describes initial work on a micro‐flow sensor for water using TFSTs.

Details

Microelectronics International, vol. 26 no. 3
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 1 August 1997

O.S. Aleksić, P.M. Nikolić, D. Vasiljević‐Radović, Luković and S. Durić

A variety of thick film planar inductors, designed forapplications in the HF range, were printed from conductive PdAg and NiFe2O4 ferrite paste on alumina substrate. Pure ferrite…

276

Abstract

A variety of thick film planar inductors, designed for applications in the HF range, were printed from conductive PdAg and NiFe2O4 ferrite paste on alumina substrate. Pure ferrite powder with a nanometric particle size was used in the NiFe2O4 paste preparation. The ferrite thick film layer characterisation was performed on small spirals, after which the following inductor planar geometries were tested together with ferrite layers: meanders, spirals, bispirals and solenoid in plane. Their impedance was analysed with an impedance analyser in the MHz‐GHz range. The results obtained were compared with the properties of the smallest cubic inductors and with the literature data for planar inductors (theoretical and practical). A comparison was made of the L geometries printed. It was observed that better utilisation of the thick ferrite layers was achieved on L geometries with equally distributed windings over the thick ferrite layers.

Details

Microelectronics International, vol. 14 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 14 December 2020

Ilya A. Surov, Vlada V. Ignateva and Andrey Y. Bazhenov

The study aims to reveal regularities of collective decision in groups of varying cooperativity and to investigate the influence of individualism–collectivism cultural dimension…

Abstract

Purpose

The study aims to reveal regularities of collective decision in groups of varying cooperativity and to investigate the influence of individualism–collectivism cultural dimension on the emergence of collective behavioral entities.

Design/methodology/approach

An agent-based model of group behavior is used to simulate the logic of collective binary decisions defined by reaching a consensus threshold. The key parameter of the model is the cooperativity of interaction between individuals which locates the group in individualism–collectivism cultural dimension. The probabilities of collective decisions are measured as a function of individual preferences and the strength of cooperation between agents.

Findings

Strong, weak and middle point cooperativities of inter-individual interaction define three distinct regimes of collective decision logic, namely, individualism, conformism and criticality. The critical organization allows the group to generate coherent non-predetermined collective behavior in statistical agreement with individual preferences.

Research limitations/implications

Emergent collective behavior with coherent and nondeterministic decision-making can be modeled in an agent-based approach with local interaction between individuals tuned to a critical point. Variation of a single cooperativity parameter accounts for a continuous transition between organizations of the group inherent to inert matter and living systems.

Social implications

A new organization of social systems distinguished by internally relaxed relations and large-scale freedom is found beyond the traditional individualism–collectivism contraposition. This state is reached by tuning behavioral logic of individuals to a critical balance of individual and collective values.

Originality/value

Individualist, conformist and critical regimes of collective organization distinct in terms of integrity, complexity and determinism are recognized as universal organizational classes of nature spanning both inert and living systems. In particular, individualist and conformist regimes produce simple deterministic behavior typical for gases and solid bodies, whereas the critical organization generates complex nondeterministic behavior inherent to living organisms.

Details

Kybernetes, vol. 50 no. 8
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 2 January 2007

O.S. Aleksić, B.M. Radojčić and R.M. Ramović

The paper aims to focus on thick film planar thermistors.

Abstract

Purpose

The paper aims to focus on thick film planar thermistors.

Design/methodology/approach

Thick film planar thermistors such as rectangular, sandwich, multilayer, segmented and interdigitated were printed of law temperature NTC paste called NTC 3K3 95/2 (Ei Iritel). Their resistivity was measured at room temperature as a function of volume resistivity variations due to electrode effect (diffusion of PdAg into NTC layer) and variation of geometrical parameters such as length l, width w, thickness d, number of segments n. The experimental data obtained were used in forming a model by the simple fitting procedure for counting diffusion effect on volume resistivity and resistivity dependence on geometrical parameters.

Findings

Thermal behavior of NTC thick films was measured in the range of −30‐120°C. Exponential factor B was fitted for measured values and included in the proposed thick film thermistors model. The agreement of measured and calculated data enables simulation of new thermistor geometries.

Originality/value

The paper focuses on the experiment which was the first step in forming a total physical/mathematical model proposed for thick film thermistor resistivity.

Details

Microelectronics International, vol. 24 no. 1
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 4 March 2021

Amir Asgari, Ali Khorsandi Taskoh and Saeed Ghiasi Nodooshan

This paper aims to introduce a conceptual model for the shaping of the innovation district under the anchor approach by extracting the specifications of the fourth-generation…

Abstract

Purpose

This paper aims to introduce a conceptual model for the shaping of the innovation district under the anchor approach by extracting the specifications of the fourth-generation university.

Design/methodology/approach

This study selected 550 resources and reduced them to 190 to achieve the most appropriate resources. This study used a meta-synthesis analysis approach using a text-mining method due to the multidisciplinary and voluminous nature of contents.

Findings

The results first reveal the shaping process and the components of innovation districts, which are: innovational urban infrastructures, knowledge economy and competitiveness and academic development. Second, this study also shows the specifications of a fourth-generation university to shape innovation districts.

Practical implications

This study also informs the policymakers and researchers internationally about the implementation requirements of a fourth-generation university and the shaping mechanisms of an innovation district.

Originality/value

This paper is pioneer about two concepts, first, it shows the shaping process of an innovation district, providing a large-scale insight about the components and second, this illustrates for the first time the specifications of a fourth-generation University practically as an anchor institute to shape innovation district.

Details

International Journal of Innovation Science, vol. 13 no. 4
Type: Research Article
ISSN: 1757-2223

Keywords

Abstract

Details

Microelectronics International, vol. 12 no. 3
Type: Research Article
ISSN: 1356-5362

Article
Publication date: 1 January 1993

O.S. Aleksić, P.M. Nikolić, T.D. Grozdić and Luković

Various thick film varistor constructions were made and characterised: ‘sandwich’, ‘interdigitated’ and ‘segmented’ varistors. The varistor active layer thickness, the electrode…

Abstract

Various thick film varistor constructions were made and characterised: ‘sandwich’, ‘interdigitated’ and ‘segmented’ varistors. The varistor active layer thickness, the electrode surface value and shape were varied. The Ul characteristics of these varistors were compared mutually, and with the Ul characteristics of the smallest chip varistors. In accordance with the results obtained, it has been shown that thick film printed varistors composed of ZnO and with additives could be applied as discrete components or integrated into a hybrid circuit.

Details

Microelectronics International, vol. 10 no. 1
Type: Research Article
ISSN: 1356-5362

Book part
Publication date: 23 November 2022

Amir Shahsavari

The institution of the university has played a significant role in the economic, social, political, and cultural developments of society throughout history, which has resulted in…

Abstract

The institution of the university has played a significant role in the economic, social, political, and cultural developments of society throughout history, which has resulted in presenting different but also contradictory views on university missions. After the middle of the twentieth century, some economic developments, especially technological ones, have led to the maximum domination of economic discourse over university missions and, consequently, the marginalization of other aspects of university missions, which constitute a significant part of the contribution of universities in society. In this regard, this study aimed to identify the missions of universities based on a comprehensive understanding of the contribution of universities in society. This study uses a systematic qualitative review strategy for collecting and investigating the data and a metasynthesis method to analyze and synthesize the findings. The data included 130 valid studies related to university missions. The research findings indicated 18 important university missions, 11 of which are considered transeconomic missions, including social, political, and cultural ones. Among the implications of this research are: the necessity of redefining higher education policy frameworks based on a more comprehensive understanding of the missions of universities and a warning about policy frameworks based on the exclusive authorization for their role in the knowledge-based economy.

Details

Theory and Method in Higher Education Research
Type: Book
ISBN: 978-1-80455-385-5

Keywords

Article
Publication date: 9 May 2023

Dheeraj Choppara, Alysia Garmulewicz and Joshua M. Pearce

This study aims to apply an open-source approach to protect the 3D printing industry from innovation stagnation due to broad patenting of obvious materials.

Abstract

Purpose

This study aims to apply an open-source approach to protect the 3D printing industry from innovation stagnation due to broad patenting of obvious materials.

Design/methodology/approach

To do this, first an open-source implementation of the first five conditions of an open-source algorithm developed to identify all obvious 3-D printing materials was implemented in Python, and the compound combinations of two and three constituents were tested on ten natural and synthetic compounds. The time complexity for combinations composed of two constituents and three constituents is determined to be O(n2) and O(n3), respectively.

Findings

Generating all combinations of materials available on the Chemical Abstracts Services (CAS) registry on the fastest processor on the market will require at least 73.9 h for the latter, but as the number of constituents increases the time needed becomes prohibitive (e.g. 3 constituents is 1.65 million years). To demonstrate how machine learning (ML) could help prioritize both theoretical as well as experimental efforts a three-part biomaterial consisting of water, agar and glycerin was used as a case study. A decision tree model is trained with the experimental data and is used to fill in missing physical properties, including Young's modulus and yield strength, with 84.9 and 85.1% accuracy, respectively.

Originality/value

The results are promising for an open-source system that can theoretically generate all possible combinations of materials for 3-D printing that can then be used to identify suitable printing material for specific business cases based on desired material properties.

Details

Journal of Manufacturing Technology Management, vol. 34 no. 6
Type: Research Article
ISSN: 1741-038X

Keywords

1 – 10 of 46