Optical sensor of components concentration in solution

Sensor Review ◽  
2019 ◽  
Vol 39 (5) ◽  
pp. 704-707
Author(s):  
Igor S. Nadezhdin ◽  
Aleksey G. Goryunov ◽  
Yuliya Yu Nadezhdina
Keyword(s):  
Sensitive Element ◽  
Light Signal ◽  
Measuring System ◽  
Practical Implementation ◽  
Remote Measurement ◽  
Content Type ◽  
Optical Cable ◽  
Require Power ◽  
Fiber Optical ◽  
Measurement Principle

Purpose This paper aims to focus on the development of an optical concentration sensor designed for measuring the concentration of components in solutions. Design/methodology/approach The operating principle of the developed sensor is based on the Bouguer–Lambert–Beer law. An optical measuring system using fiber optical cables was used for the practical implementation of the concentration sensor. Findings As a result of fiber optical cable use in the concentration sensor, the remote measurement principle was implemented, ensuring the instrument’s reliability and the reduction of operating costs. Originality/value The advantage of the proposed measuring system is that the sensitive element is maintenance-free, does not require power supply and can operate under severe industrial conditions. Using a fiber optic cable to transmit a light signal allows placing the sensitive element at a distance of several tens of meters from the electronics unit (the smart part).

Image reconstruction by solving the inverse problem in ultrasonic transmission tomography system

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tomasz Rymarczyk ◽  
Konrad Kania ◽  
Michał Gołąbek ◽  
Jan Sikora ◽  
Michał Maj ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Measuring System ◽  
Practical Implementation ◽  
Projection Data ◽  
Reconstruction Algorithms ◽  
Transmission Tomography ◽  
Content Type ◽  
Fermat Principle ◽  
Finite Set ◽  
Transformation Methods

Purpose The purpose of this study is to develop a reconstruction and measurement system for data analysis using ultrasonic transmission tomography. The problem of reconstruction from the projection is encountered in practical implementation, which consists in reconstructing an image that is an estimation of an unknown object from a finite set of projection data. Reconstructive algorithms used in transmission tomography are based on linear mathematical models, which makes it necessary to process non-linear data into estimates for a finite number of projections. The application of transformation methods requires building a mathematical model in which the projection data forming the known and unknown quantities are functions with arguments from a continuous set of real numbers, determining the function describing the unknown quantities sought in the form of inverse relation and adapting it to operate on discrete and noisy data. This was done by designing a tomographic device and proprietary algorithms capable of reconstructing two-dimensional images regardless of the size, shape, location or number of inclusions hidden in the examined object. Design/methodology/approach The application consists of a device and measuring sensors, as well as proprietary algorithms for image reconstruction. Ultrasonic transmission tomography makes it possible to analyse processes occurring in an object without interfering with the examined object. The proposed solution uses algorithms based on ray integration, the Fermat principle and deterministic methods. Two applications were developed, one based on C and implemented on the embedded device, while the other application was made in Matlab. Findings Research shows that ultrasonic transmission tomography provides an effective analysis of tested objects in closed tanks. Research limitations/implications In the presented technique, the use of ultrasonic absorption wave has been limited. Nevertheless, the effectiveness of such a solution has been confirmed. Practical implications The presented solution can be used for research and monitoring of technological processes. Originality/value Author’s tomographic system consisting of a measuring system and image reconstruction algorithms.

Compact Energy Measuring System for Short Pulse Lasers

2013 ◽  
Vol 20 (2) ◽  
pp. 183-190 ◽  
Author(s):  
A. Barna ◽  
I. B. Földes ◽  
Z. Gingl ◽  
R. Mingesz
Keyword(s):  
Short Pulse ◽  
Electronic Devices ◽  
Laser Pulses ◽  
Measuring System ◽  
Electric Response ◽  
Usb Interface ◽  
Radiated Noise ◽  
Fiber Optical ◽  
Measurement Control ◽  
Short Pulse Lasers

Abstract In experiments with short-pulse lasers the measurement control of the energy of the laser pulse is of crucial importance. Generally it is difficult to measure the amplitude of the pulses of short-pulse lasers using electronic devices, their response time being longer than the duration of the laser pulses. The electric response of the detector is still too fast to be directly digitized therefore a peak-hold unit can be used to allow data processing for the computer. In this paper we present a device which measures the energy of UV short (fs) pulses shot-byshot, digitizes and sends the data to the PC across an USB interface. The circuit is based on an analog peak detect and hold unit and the use of fiber optical coupling between the PC and the device provides a significant improvement to eliminate potential ground loops and to reduce conductive and radiated noise as well. The full development is open source and has been made available to download from our web page (http://www.noise.inf.u-szeged.hu/Instruments/PeakHold/).

Research on Embedded Roundness Measuring System

2012 ◽  
Vol 184-185 ◽  
pp. 1613-1617
Author(s):  
Jin Fang Zhu
Keyword(s):  
Data Collection ◽  
Power Consumption ◽  
Low Power ◽  
High Accuracy ◽  
Measuring System ◽  
Low Power Consumption ◽  
Measurement Principle ◽  
Graphic Construction ◽  
Collection Date ◽  
Roundness Measurement

This article studies the embedded SPC and its application in roundness measuring system by analyzing the current roundness measurement principle and technology. With analyzing the process of data collection, date treatment and various kinds of tool graphic construction, we study the feasibility of integrating SPC into roundness measurement and finally apply the embedded SPC as pure software into roundness measuring system. We design the roundness measuring system based on embedded SPC and develop the roundness measuring system of low power consumption, high accuracy and easy application, which is suitable for industry field usage.

Non-cancer pain clinic in three English prisons: understanding prisoner needs and prescribing practice in relation to chronic non-cancer pain (CNCP)

2018 ◽  
Vol 14 (4) ◽  
pp. 268-275
Author(s):  
Arun Sondhi ◽  
Tina Garrett
Keyword(s):  
Cancer Pain ◽  
Substance Misuse ◽  
Emotional Health ◽  
Secondary Analysis ◽  
Therapeutic Interventions ◽  
Pain Clinic ◽  
Practical Implementation ◽  
Physical And Mental Health ◽  
Content Type ◽  
Female Patients

Purpose Prisoner access to opiate-based analgesics and gabapentinoids is a concern to prisons through illicit trading. The purpose of this paper is to describe patient needs following introduction of nine pilot chronic non-cancer pain (CNCP) clinics for chronic pain in three prisons (two male and one female) in the South of England. The study evaluated the effectiveness of this model and assessed the wider practical implementation issues. Design/methodology/approach Clinical notes were reviewed for 63 consultations, anonymised and recorded for secondary analysis. Findings Alongside CNCP, high levels of substance misuse, physical and mental health histories were noted, especially for female patients. Amitriptyline, pregabalin, gabapentin were the main frontline analgesics prescribed prior to assessment. A total of 41 per cent of patients did not change their medication following the consultation; 25 per cent had their medication increased or reintroduced (greater for women prisoners); with one-third (33 per cent) of patients reducing the prescription of strong opioids and gabapentinoids. Significant differences were noted between male and female patients. Prisoners were amenable to changes in medication to facilitate access to work and other therapeutic interventions. Social implications The prescribing of analgesics has largely been couched in terms of disruption to the prison regime through illicit trading. This study highlights the need to place CNCP within wider contexts of substance misuse, physical and emotional health. There is an opportunity to develop a rehabilitative rather than palliative approach to pain management. Gender specific approaches for female patients should be considered. Originality/value Few studies of CNCP have been conducted within a prison environment.

The effectiveness of e-corporate governance: an exploratory study of internet voting at shareholders’ annual meetings in France

2020 ◽  
Vol 20 (4) ◽  
pp. 673-702
Author(s):  
Sonia Abdennadher ◽  
Walid Cheffi
Keyword(s):  
Corporate Governance ◽  
Practical Implementation ◽  
Business Law ◽  
Content Type ◽  
Internet Voting ◽  
Documentary Analysis ◽  
Governance Effectiveness ◽  
Voting System ◽  
The Relationship

Purpose E-corporate governance or the use of technologies and information systems (ISs) in corporate governance, is still a subject that is too seldom addressed in business research. This paper is at the intersection between two fields of research (corporate governance and the management of ISs), which are interdependent in ways that are still unexplored. The paper analyzes the implications of internet voting (IV) at shareholders’ annual meetings (SAM) for the corporate governance of listed companies in France, in particular for the relationship between executives and shareholders. Most of the studies that have dealt with IV at SAM have focused on techno-legal issues and were often conducted by business law researchers. The purpose of this paper is to investigate the implications of the new voting system through the prism of corporate governance. Design/methodology/approach The authors proceeded by triangulation of methods. This qualitative study is based on observations, interviews and documentary analysis. It assessed the IV implications for both the issuing companies and the shareholders. Findings The new voting system brings undeniable competitive advantage to the issuing company and facilitates shareholders’ activism, yet it has serious risks both for the corporations and for certain categories of the shareholder. Interestingly, the authors propose an original and field-grounded typology that distinguishes the risks and benefits associated with IV in relation to executives’ attitudes. Social implications The paper shows that the resolving of identified deficiencies with IV development could contribute to the alignment of companies’ interests with those of shareholders. Moreover, the study calls for policymakers to appoint an official body to regulate the practical implementation of the new system and to prevent its dissemination being held hostage to the executives’ willingness. Originality/value An original aspect of this research lies in the effective operationalization of the constructs of corporate governance effectiveness with a view to examining corporate governance as a set of technologically mediated practices. Moreover, this study emphasizes the key role of the construct of “executives’ willingness” in facilitating/impeding IV diffusion. This underlies their attempts to reverse the corporate governance relationship.

Dynamic sliding mode position control of induction motors based load torque compensation using adaptive state observer

2018 ◽  
Vol 37 (6) ◽  
pp. 2249-2262
Author(s):  
Ali Karami-Mollaee ◽  
Hamed Tirandaz ◽  
Oscar Barambones
Keyword(s):  
Position Control ◽  
Sliding Mode ◽  
State Observer ◽  
Practical Implementation ◽  
Load Torque ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Content Type ◽  
Adaptive State Observer ◽  
Dynamic Sliding Mode

Purpose The purpose of this paper is position control scheme for a servo induction motor (SIM) with uncertainty has been designed using a new observer issue and a dynamic sliding mode control (DSMC). Design/methodology/approach In DSMC, the chattering is removed due to the integrator (or a low-pass filter) which is placed before the input control of the plant. However, in DSMC, the augmented system has one dimension bigger than the actual system (if integrator is used) and then, the plant model should be completely known. To solve this problem in SIM, the use of a new adaptive state observer (ASO) is proposed. Findings The advantage of the proposed approach is to maintain the system controlled under the external load torque variations. Then, the load variations do not affect the motor positioning. Moreover, it is demonstrated that the observer error converges to zero based on the Lyapunov stability theory. Originality/value The knowledge of the upper bound for the system uncertainty is not necessary in an adaptive state observer, which is important in practical implementation. Simulation results are presented to demonstrate the performance of the proposed approach.

Making for learning: how graduate students discuss and design for maker-focused pedagogy

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Megan Humburg ◽  
Verily Tan ◽  
Adam V. Maltese ◽  
Amber Simpson ◽  
Joshua A. Danish
Keyword(s):  
Graduate Students ◽  
Formal Education ◽  
Lesson Plans ◽  
Future Research ◽  
Practical Implementation ◽  
Pedagogical Strategies ◽  
Content Type ◽  
Maker Education ◽  
Support Students ◽  
Education Courses

Purpose This study aims to understand how graduate students in a maker education course discuss beliefs about making and implement these beliefs as pedagogy in their curricular designs. Design/methodology/approach Interview transcripts from seven students were analyzed thematically for conceptions of making and learning. Lesson plans were also coded for elements of making, and the authors compared students’ articulated ideas about making with the practical implementation of making in their designs. Findings Students reflected on the nature of making and the possible benefits and tensions surrounding the use of making for learning. Multiple students discussed benefits for their future learning and careers. Comparisons between interview and lesson plans highlight both successful alignments and key gaps in the application of making principles, including struggles that students encountered when translating their beliefs about making into real-world pedagogy. Research limitations/implications Given the limited sample size, future research should explore the extent to which educators in other contexts encounter similar or different obstacles in their development of maker-focused pedagogies. Practical implications Findings can be used to inform future maker education courses to better support students in successfully translating core principles of making from general beliefs into effective and practical pedagogical strategies. Originality/value Despite widespread interest in combining making with educational spaces, much remains to be understood about the strategies that educators use to integrate elements of making into their pedagogy. This study contributes discussions of the benefits and tensions that maker educators may encounter when blending tenets of making with the needs of formal education.

Barriers of knowledge transfer and mitigating strategies in collaborative management system implementations

2019 ◽  
Vol 49 (1) ◽  
pp. 2-20 ◽  
Author(s):  
Juanqiong Gou ◽  
Nan Li ◽  
Tete Lyu ◽  
Xiyan Lyu ◽  
Zuopeng Zhang
Keyword(s):  
Information Systems ◽  
Knowledge Transfer ◽  
Management System ◽  
Transfer Problem ◽  
Relevant Literature ◽  
Implementation Process ◽  
Collaborative Management ◽  
Practical Implementation ◽  
Content Type ◽  
Implementation Methodology

PurposeAs the dynamics of the external environment of the enterprise continue to increase, the support of information systems for organizational agility becomes increasingly important. Collaborative Management System (CMS) is a new type of information system that can cope with the dynamic changes of the organization. Effective knowledge transfer is the core of the system implementation. The purpose of this study is to explore the knowledge transfer barriers faced by CMS in its implementation process.Design/methodology/approachThrough field interviews with a representative CMS provider, this paper summarizes the barriers of knowledge transfer during CMS implementation into three aspects.FindingsBased on the innovative measures taken by the company and relevant literature, the corresponding mitigating strategies are proposed.Originality/valueThe findings enrich the implementation methodology of agile information systems by exploring the knowledge transfer problem from a novel context. The study also provides a reference for practical implementation to overcome the dilemma of knowledge transfer.

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